X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/ca92fe3359ce2a751763b1bb0bfe824a89b20853..1e78b1e4d264674be20e5517c1e218608a623743:/vendor/assets/iD/iD.js

diff --git a/vendor/assets/iD/iD.js b/vendor/assets/iD/iD.js
index 6cc200808..088e252a2 100644
--- a/vendor/assets/iD/iD.js
+++ b/vendor/assets/iD/iD.js
@@ -1,5053 +1,6776 @@
 (function () {
+
 	var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
 
-	function createCommonjsModule(fn, basedir, module) {
-		return module = {
-		  path: basedir,
-		  exports: {},
-		  require: function (path, base) {
-	      return commonjsRequire(path, (base === undefined || base === null) ? module.path : base);
-	    }
-		}, fn(module, module.exports), module.exports;
-	}
+	var check = function (it) {
+	  return it && it.Math == Math && it;
+	};
 
-	function getCjsExportFromNamespace (n) {
-		return n && n['default'] || n;
-	}
+	// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
+	var global$1o =
+	  // eslint-disable-next-line es/no-global-this -- safe
+	  check(typeof globalThis == 'object' && globalThis) ||
+	  check(typeof window == 'object' && window) ||
+	  // eslint-disable-next-line no-restricted-globals -- safe
+	  check(typeof self == 'object' && self) ||
+	  check(typeof commonjsGlobal == 'object' && commonjsGlobal) ||
+	  // eslint-disable-next-line no-new-func -- fallback
+	  (function () { return this; })() || Function('return this')();
 
-	function commonjsRequire () {
-		throw new Error('Dynamic requires are not currently supported by @rollup/plugin-commonjs');
-	}
+	var objectGetOwnPropertyDescriptor = {};
 
-	var isImplemented = function () {
-		var set, iterator, result;
-		if (typeof Set !== 'function') { return false; }
-		set = new Set(['raz', 'dwa', 'trzy']);
-		if (String(set) !== '[object Set]') { return false; }
-		if (set.size !== 3) { return false; }
-		if (typeof set.add !== 'function') { return false; }
-		if (typeof set.clear !== 'function') { return false; }
-		if (typeof set.delete !== 'function') { return false; }
-		if (typeof set.entries !== 'function') { return false; }
-		if (typeof set.forEach !== 'function') { return false; }
-		if (typeof set.has !== 'function') { return false; }
-		if (typeof set.keys !== 'function') { return false; }
-		if (typeof set.values !== 'function') { return false; }
+	var fails$V = function (exec) {
+	  try {
+	    return !!exec();
+	  } catch (error) {
+	    return true;
+	  }
+	};
 
-		iterator = set.values();
-		result = iterator.next();
-		if (result.done !== false) { return false; }
-		if (result.value !== 'raz') { return false; }
+	var fails$U = fails$V;
 
-		return true;
-	};
+	// Detect IE8's incomplete defineProperty implementation
+	var descriptors = !fails$U(function () {
+	  // eslint-disable-next-line es/no-object-defineproperty -- required for testing
+	  return Object.defineProperty({}, 1, { get: function () { return 7; } })[1] != 7;
+	});
 
-	// eslint-disable-next-line no-empty-function
-	var noop = function () {};
+	var fails$T = fails$V;
 
-	var _undefined = noop(); // Support ES3 engines
+	var functionBindNative = !fails$T(function () {
+	  var test = (function () { /* empty */ }).bind();
+	  // eslint-disable-next-line no-prototype-builtins -- safe
+	  return typeof test != 'function' || test.hasOwnProperty('prototype');
+	});
 
-	var isValue = function (val) { return val !== _undefined && val !== null; };
+	var NATIVE_BIND$4 = functionBindNative;
 
-	var validValue = function (value) {
-		if (!isValue(value)) { throw new TypeError("Cannot use null or undefined"); }
-		return value;
-	};
+	var call$q = Function.prototype.call;
 
-	var clear = function () {
-		validValue(this).length = 0;
-		return this;
+	var functionCall = NATIVE_BIND$4 ? call$q.bind(call$q) : function () {
+	  return call$q.apply(call$q, arguments);
 	};
 
-	var isImplemented$1 = function () {
-		var numberIsNaN = Number.isNaN;
-		if (typeof numberIsNaN !== "function") { return false; }
-		return !numberIsNaN({}) && numberIsNaN(NaN) && !numberIsNaN(34);
-	};
+	var objectPropertyIsEnumerable = {};
 
-	var shim = function (value) {
-		// eslint-disable-next-line no-self-compare
-		return value !== value;
-	};
+	var $propertyIsEnumerable$2 = {}.propertyIsEnumerable;
+	// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	var getOwnPropertyDescriptor$5 = Object.getOwnPropertyDescriptor;
 
-	var isNan = isImplemented$1() ? Number.isNaN : shim;
+	// Nashorn ~ JDK8 bug
+	var NASHORN_BUG = getOwnPropertyDescriptor$5 && !$propertyIsEnumerable$2.call({ 1: 2 }, 1);
 
-	var isImplemented$2 = function () {
-		var sign = Math.sign;
-		if (typeof sign !== "function") { return false; }
-		return sign(10) === 1 && sign(-20) === -1;
+	// `Object.prototype.propertyIsEnumerable` method implementation
+	// https://tc39.es/ecma262/#sec-object.prototype.propertyisenumerable
+	objectPropertyIsEnumerable.f = NASHORN_BUG ? function propertyIsEnumerable(V) {
+	  var descriptor = getOwnPropertyDescriptor$5(this, V);
+	  return !!descriptor && descriptor.enumerable;
+	} : $propertyIsEnumerable$2;
+
+	var createPropertyDescriptor$7 = function (bitmap, value) {
+	  return {
+	    enumerable: !(bitmap & 1),
+	    configurable: !(bitmap & 2),
+	    writable: !(bitmap & 4),
+	    value: value
+	  };
 	};
 
-	var shim$1 = function (value) {
-		value = Number(value);
-		if (isNaN(value) || value === 0) { return value; }
-		return value > 0 ? 1 : -1;
+	var NATIVE_BIND$3 = functionBindNative;
+
+	var FunctionPrototype$3 = Function.prototype;
+	var bind$g = FunctionPrototype$3.bind;
+	var call$p = FunctionPrototype$3.call;
+	var uncurryThis$Y = NATIVE_BIND$3 && bind$g.bind(call$p, call$p);
+
+	var functionUncurryThis = NATIVE_BIND$3 ? function (fn) {
+	  return fn && uncurryThis$Y(fn);
+	} : function (fn) {
+	  return fn && function () {
+	    return call$p.apply(fn, arguments);
+	  };
 	};
 
-	var sign = isImplemented$2() ? Math.sign : shim$1;
+	var uncurryThis$X = functionUncurryThis;
 
-	var abs   = Math.abs
-	  , floor = Math.floor;
+	var toString$n = uncurryThis$X({}.toString);
+	var stringSlice$c = uncurryThis$X(''.slice);
 
-	var toInteger = function (value) {
-		if (isNaN(value)) { return 0; }
-		value = Number(value);
-		if (value === 0 || !isFinite(value)) { return value; }
-		return sign(value) * floor(abs(value));
+	var classofRaw$1 = function (it) {
+	  return stringSlice$c(toString$n(it), 8, -1);
 	};
 
-	var max       = Math.max;
+	var global$1n = global$1o;
+	var uncurryThis$W = functionUncurryThis;
+	var fails$S = fails$V;
+	var classof$e = classofRaw$1;
 
-	var toPosInteger = function (value) { return max(0, toInteger(value)); };
+	var Object$5 = global$1n.Object;
+	var split$4 = uncurryThis$W(''.split);
 
-	var indexOf           = Array.prototype.indexOf
-	  , objHasOwnProperty = Object.prototype.hasOwnProperty
-	  , abs$1               = Math.abs
-	  , floor$1             = Math.floor;
+	// fallback for non-array-like ES3 and non-enumerable old V8 strings
+	var indexedObject = fails$S(function () {
+	  // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346
+	  // eslint-disable-next-line no-prototype-builtins -- safe
+	  return !Object$5('z').propertyIsEnumerable(0);
+	}) ? function (it) {
+	  return classof$e(it) == 'String' ? split$4(it, '') : Object$5(it);
+	} : Object$5;
 
-	var eIndexOf = function (searchElement/*, fromIndex*/) {
-		var i, length, fromIndex, val;
-		if (!isNan(searchElement)) { return indexOf.apply(this, arguments); }
+	var global$1m = global$1o;
 
-		length = toPosInteger(validValue(this).length);
-		fromIndex = arguments[1];
-		if (isNaN(fromIndex)) { fromIndex = 0; }
-		else if (fromIndex >= 0) { fromIndex = floor$1(fromIndex); }
-		else { fromIndex = toPosInteger(this.length) - floor$1(abs$1(fromIndex)); }
+	var TypeError$p = global$1m.TypeError;
 
-		for (i = fromIndex; i < length; ++i) {
-			if (objHasOwnProperty.call(this, i)) {
-				val = this[i];
-				if (isNan(val)) { return i; } // Jslint: ignore
-			}
-		}
-		return -1;
+	// `RequireObjectCoercible` abstract operation
+	// https://tc39.es/ecma262/#sec-requireobjectcoercible
+	var requireObjectCoercible$e = function (it) {
+	  if (it == undefined) throw TypeError$p("Can't call method on " + it);
+	  return it;
 	};
 
-	var create = Object.create, getPrototypeOf = Object.getPrototypeOf, plainObject = {};
+	// toObject with fallback for non-array-like ES3 strings
+	var IndexedObject$4 = indexedObject;
+	var requireObjectCoercible$d = requireObjectCoercible$e;
 
-	var isImplemented$3 = function (/* CustomCreate*/) {
-		var setPrototypeOf = Object.setPrototypeOf, customCreate = arguments[0] || create;
-		if (typeof setPrototypeOf !== "function") { return false; }
-		return getPrototypeOf(setPrototypeOf(customCreate(null), plainObject)) === plainObject;
+	var toIndexedObject$d = function (it) {
+	  return IndexedObject$4(requireObjectCoercible$d(it));
 	};
 
-	var map = { function: true, object: true };
-
-	var isObject = function (value) { return (isValue(value) && map[typeof value]) || false; };
-
-	var create$1 = Object.create, shim$2;
-
-	if (!isImplemented$3()) {
-		shim$2 = shim$3;
-	}
-
-	var create_1 = (function () {
-		var nullObject, polyProps, desc;
-		if (!shim$2) { return create$1; }
-		if (shim$2.level !== 1) { return create$1; }
-
-		nullObject = {};
-		polyProps = {};
-		desc = { configurable: false, enumerable: false, writable: true, value: undefined };
-		Object.getOwnPropertyNames(Object.prototype).forEach(function (name) {
-			if (name === "__proto__") {
-				polyProps[name] = {
-					configurable: true,
-					enumerable: false,
-					writable: true,
-					value: undefined
-				};
-				return;
-			}
-			polyProps[name] = desc;
-		});
-		Object.defineProperties(nullObject, polyProps);
-
-		Object.defineProperty(shim$2, "nullPolyfill", {
-			configurable: false,
-			enumerable: false,
-			writable: false,
-			value: nullObject
-		});
-
-		return function (prototype, props) {
-			return create$1(prototype === null ? nullObject : prototype, props);
-		};
-	})();
+	// `IsCallable` abstract operation
+	// https://tc39.es/ecma262/#sec-iscallable
+	var isCallable$r = function (argument) {
+	  return typeof argument == 'function';
+	};
 
-	var objIsPrototypeOf = Object.prototype.isPrototypeOf
-	  , defineProperty   = Object.defineProperty
-	  , nullDesc         = { configurable: true, enumerable: false, writable: true, value: undefined }
-	  , validate;
+	var isCallable$q = isCallable$r;
 
-	validate = function (obj, prototype) {
-		validValue(obj);
-		if (prototype === null || isObject(prototype)) { return obj; }
-		throw new TypeError("Prototype must be null or an object");
+	var isObject$s = function (it) {
+	  return typeof it == 'object' ? it !== null : isCallable$q(it);
 	};
 
-	var shim$3 = (function (status) {
-		var fn, set;
-		if (!status) { return null; }
-		if (status.level === 2) {
-			if (status.set) {
-				set = status.set;
-				fn = function (obj, prototype) {
-					set.call(validate(obj, prototype), prototype);
-					return obj;
-				};
-			} else {
-				fn = function (obj, prototype) {
-					validate(obj, prototype).__proto__ = prototype;
-					return obj;
-				};
-			}
-		} else {
-			fn = function self(obj, prototype) {
-				var isNullBase;
-				validate(obj, prototype);
-				isNullBase = objIsPrototypeOf.call(self.nullPolyfill, obj);
-				if (isNullBase) { delete self.nullPolyfill.__proto__; }
-				if (prototype === null) { prototype = self.nullPolyfill; }
-				obj.__proto__ = prototype;
-				if (isNullBase) { defineProperty(self.nullPolyfill, "__proto__", nullDesc); }
-				return obj;
-			};
-		}
-		return Object.defineProperty(fn, "level", {
-			configurable: false,
-			enumerable: false,
-			writable: false,
-			value: status.level
-		});
-	})(
-		(function () {
-			var tmpObj1 = Object.create(null)
-			  , tmpObj2 = {}
-			  , set
-			  , desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
-
-			if (desc) {
-				try {
-					set = desc.set; // Opera crashes at this point
-					set.call(tmpObj1, tmpObj2);
-				} catch (ignore) {}
-				if (Object.getPrototypeOf(tmpObj1) === tmpObj2) { return { set: set, level: 2 }; }
-			}
-
-			tmpObj1.__proto__ = tmpObj2;
-			if (Object.getPrototypeOf(tmpObj1) === tmpObj2) { return { level: 2 }; }
-
-			tmpObj1 = {};
-			tmpObj1.__proto__ = tmpObj2;
-			if (Object.getPrototypeOf(tmpObj1) === tmpObj2) { return { level: 1 }; }
-
-			return false;
-		})()
-	);
-
-	var setPrototypeOf = isImplemented$3() ? Object.setPrototypeOf : shim$3;
-
-	var validCallable = function (fn) {
-		if (typeof fn !== "function") { throw new TypeError(fn + " is not a function"); }
-		return fn;
+	var global$1l = global$1o;
+	var isCallable$p = isCallable$r;
+
+	var aFunction = function (argument) {
+	  return isCallable$p(argument) ? argument : undefined;
 	};
 
-	// ES3 safe
-	var _undefined$1 = void 0;
+	var getBuiltIn$b = function (namespace, method) {
+	  return arguments.length < 2 ? aFunction(global$1l[namespace]) : global$1l[namespace] && global$1l[namespace][method];
+	};
 
-	var is = function (value) { return value !== _undefined$1 && value !== null; };
+	var uncurryThis$V = functionUncurryThis;
 
-	// prettier-ignore
-	var possibleTypes = { "object": true, "function": true, "undefined": true /* document.all */ };
+	var objectIsPrototypeOf = uncurryThis$V({}.isPrototypeOf);
 
-	var is$1 = function (value) {
-		if (!is(value)) { return false; }
-		return hasOwnProperty.call(possibleTypes, typeof value);
-	};
+	var getBuiltIn$a = getBuiltIn$b;
 
-	var is$2 = function (value) {
-		if (!is$1(value)) { return false; }
-		try {
-			if (!value.constructor) { return false; }
-			return value.constructor.prototype === value;
-		} catch (error) {
-			return false;
-		}
-	};
+	var engineUserAgent = getBuiltIn$a('navigator', 'userAgent') || '';
 
-	var is$3 = function (value) {
-		if (typeof value !== "function") { return false; }
+	var global$1k = global$1o;
+	var userAgent$7 = engineUserAgent;
 
-		if (!hasOwnProperty.call(value, "length")) { return false; }
+	var process$4 = global$1k.process;
+	var Deno = global$1k.Deno;
+	var versions = process$4 && process$4.versions || Deno && Deno.version;
+	var v8 = versions && versions.v8;
+	var match, version$1;
 
-		try {
-			if (typeof value.length !== "number") { return false; }
-			if (typeof value.call !== "function") { return false; }
-			if (typeof value.apply !== "function") { return false; }
-		} catch (error) {
-			return false;
-		}
+	if (v8) {
+	  match = v8.split('.');
+	  // in old Chrome, versions of V8 isn't V8 = Chrome / 10
+	  // but their correct versions are not interesting for us
+	  version$1 = match[0] > 0 && match[0] < 4 ? 1 : +(match[0] + match[1]);
+	}
 
-		return !is$2(value);
-	};
+	// BrowserFS NodeJS `process` polyfill incorrectly set `.v8` to `0.0`
+	// so check `userAgent` even if `.v8` exists, but 0
+	if (!version$1 && userAgent$7) {
+	  match = userAgent$7.match(/Edge\/(\d+)/);
+	  if (!match || match[1] >= 74) {
+	    match = userAgent$7.match(/Chrome\/(\d+)/);
+	    if (match) version$1 = +match[1];
+	  }
+	}
 
-	var classRe = /^\s*class[\s{/}]/, functionToString = Function.prototype.toString;
+	var engineV8Version = version$1;
 
-	var is$4 = function (value) {
-		if (!is$3(value)) { return false; }
-		if (classRe.test(functionToString.call(value))) { return false; }
-		return true;
-	};
+	/* eslint-disable es/no-symbol -- required for testing */
 
-	var isImplemented$4 = function () {
-		var assign = Object.assign, obj;
-		if (typeof assign !== "function") { return false; }
-		obj = { foo: "raz" };
-		assign(obj, { bar: "dwa" }, { trzy: "trzy" });
-		return obj.foo + obj.bar + obj.trzy === "razdwatrzy";
-	};
+	var V8_VERSION$3 = engineV8Version;
+	var fails$R = fails$V;
 
-	var isImplemented$5 = function () {
-		try {
-			Object.keys("primitive");
-			return true;
-		} catch (e) {
-			return false;
-		}
-	};
+	// eslint-disable-next-line es/no-object-getownpropertysymbols -- required for testing
+	var nativeSymbol = !!Object.getOwnPropertySymbols && !fails$R(function () {
+	  var symbol = Symbol();
+	  // Chrome 38 Symbol has incorrect toString conversion
+	  // `get-own-property-symbols` polyfill symbols converted to object are not Symbol instances
+	  return !String(symbol) || !(Object(symbol) instanceof Symbol) ||
+	    // Chrome 38-40 symbols are not inherited from DOM collections prototypes to instances
+	    !Symbol.sham && V8_VERSION$3 && V8_VERSION$3 < 41;
+	});
 
-	var keys = Object.keys;
+	/* eslint-disable es/no-symbol -- required for testing */
 
-	var shim$4 = function (object) { return keys(isValue(object) ? Object(object) : object); };
+	var NATIVE_SYMBOL$3 = nativeSymbol;
 
-	var keys$1 = isImplemented$5() ? Object.keys : shim$4;
+	var useSymbolAsUid = NATIVE_SYMBOL$3
+	  && !Symbol.sham
+	  && typeof Symbol.iterator == 'symbol';
 
-	var max$1   = Math.max;
+	var global$1j = global$1o;
+	var getBuiltIn$9 = getBuiltIn$b;
+	var isCallable$o = isCallable$r;
+	var isPrototypeOf$9 = objectIsPrototypeOf;
+	var USE_SYMBOL_AS_UID$1 = useSymbolAsUid;
 
-	var shim$5 = function (dest, src/*, …srcn*/) {
-		var arguments$1 = arguments;
+	var Object$4 = global$1j.Object;
 
-		var error, i, length = max$1(arguments.length, 2), assign;
-		dest = Object(validValue(dest));
-		assign = function (key) {
-			try {
-				dest[key] = src[key];
-			} catch (e) {
-				if (!error) { error = e; }
-			}
-		};
-		for (i = 1; i < length; ++i) {
-			src = arguments$1[i];
-			keys$1(src).forEach(assign);
-		}
-		if (error !== undefined) { throw error; }
-		return dest;
+	var isSymbol$6 = USE_SYMBOL_AS_UID$1 ? function (it) {
+	  return typeof it == 'symbol';
+	} : function (it) {
+	  var $Symbol = getBuiltIn$9('Symbol');
+	  return isCallable$o($Symbol) && isPrototypeOf$9($Symbol.prototype, Object$4(it));
 	};
 
-	var assign = isImplemented$4() ? Object.assign : shim$5;
+	var global$1i = global$1o;
 
-	var forEach = Array.prototype.forEach, create$2 = Object.create;
+	var String$6 = global$1i.String;
 
-	var process$1 = function (src, obj) {
-		var key;
-		for (key in src) { obj[key] = src[key]; }
+	var tryToString$5 = function (argument) {
+	  try {
+	    return String$6(argument);
+	  } catch (error) {
+	    return 'Object';
+	  }
 	};
 
-	// eslint-disable-next-line no-unused-vars
-	var normalizeOptions = function (opts1/*, …options*/) {
-		var result = create$2(null);
-		forEach.call(arguments, function (options) {
-			if (!isValue(options)) { return; }
-			process$1(Object(options), result);
-		});
-		return result;
-	};
+	var global$1h = global$1o;
+	var isCallable$n = isCallable$r;
+	var tryToString$4 = tryToString$5;
 
-	var str = "razdwatrzy";
+	var TypeError$o = global$1h.TypeError;
 
-	var isImplemented$6 = function () {
-		if (typeof str.contains !== "function") { return false; }
-		return str.contains("dwa") === true && str.contains("foo") === false;
+	// `Assert: IsCallable(argument) is true`
+	var aCallable$a = function (argument) {
+	  if (isCallable$n(argument)) return argument;
+	  throw TypeError$o(tryToString$4(argument) + ' is not a function');
 	};
 
-	var indexOf$1 = String.prototype.indexOf;
+	var aCallable$9 = aCallable$a;
 
-	var shim$6 = function (searchString/*, position*/) {
-		return indexOf$1.call(this, searchString, arguments[1]) > -1;
+	// `GetMethod` abstract operation
+	// https://tc39.es/ecma262/#sec-getmethod
+	var getMethod$7 = function (V, P) {
+	  var func = V[P];
+	  return func == null ? undefined : aCallable$9(func);
 	};
 
-	var contains = isImplemented$6() ? String.prototype.contains : shim$6;
+	var global$1g = global$1o;
+	var call$o = functionCall;
+	var isCallable$m = isCallable$r;
+	var isObject$r = isObject$s;
+
+	var TypeError$n = global$1g.TypeError;
 
-	var d_1 = createCommonjsModule(function (module) {
+	// `OrdinaryToPrimitive` abstract operation
+	// https://tc39.es/ecma262/#sec-ordinarytoprimitive
+	var ordinaryToPrimitive$1 = function (input, pref) {
+	  var fn, val;
+	  if (pref === 'string' && isCallable$m(fn = input.toString) && !isObject$r(val = call$o(fn, input))) return val;
+	  if (isCallable$m(fn = input.valueOf) && !isObject$r(val = call$o(fn, input))) return val;
+	  if (pref !== 'string' && isCallable$m(fn = input.toString) && !isObject$r(val = call$o(fn, input))) return val;
+	  throw TypeError$n("Can't convert object to primitive value");
+	};
 
+	var shared$5 = {exports: {}};
 
+	var isPure = false;
 
-	var d = (module.exports = function (dscr, value/*, options*/) {
-		var c, e, w, options, desc;
-		if (arguments.length < 2 || typeof dscr !== "string") {
-			options = value;
-			value = dscr;
-			dscr = null;
-		} else {
-			options = arguments[2];
-		}
-		if (is(dscr)) {
-			c = contains.call(dscr, "c");
-			e = contains.call(dscr, "e");
-			w = contains.call(dscr, "w");
-		} else {
-			c = w = true;
-			e = false;
-		}
+	var global$1f = global$1o;
 
-		desc = { value: value, configurable: c, enumerable: e, writable: w };
-		return !options ? desc : assign(normalizeOptions(options), desc);
-	});
+	// eslint-disable-next-line es/no-object-defineproperty -- safe
+	var defineProperty$d = Object.defineProperty;
 
-	d.gs = function (dscr, get, set/*, options*/) {
-		var c, e, options, desc;
-		if (typeof dscr !== "string") {
-			options = set;
-			set = get;
-			get = dscr;
-			dscr = null;
-		} else {
-			options = arguments[3];
-		}
-		if (!is(get)) {
-			get = undefined;
-		} else if (!is$4(get)) {
-			options = get;
-			get = set = undefined;
-		} else if (!is(set)) {
-			set = undefined;
-		} else if (!is$4(set)) {
-			options = set;
-			set = undefined;
-		}
-		if (is(dscr)) {
-			c = contains.call(dscr, "c");
-			e = contains.call(dscr, "e");
-		} else {
-			c = true;
-			e = false;
-		}
-
-		desc = { get: get, set: set, configurable: c, enumerable: e };
-		return !options ? desc : assign(normalizeOptions(options), desc);
+	var setGlobal$3 = function (key, value) {
+	  try {
+	    defineProperty$d(global$1f, key, { value: value, configurable: true, writable: true });
+	  } catch (error) {
+	    global$1f[key] = value;
+	  } return value;
 	};
-	});
 
-	var eventEmitter = createCommonjsModule(function (module, exports) {
+	var global$1e = global$1o;
+	var setGlobal$2 = setGlobal$3;
 
-	var apply = Function.prototype.apply, call = Function.prototype.call
-	  , create = Object.create, defineProperty = Object.defineProperty
-	  , defineProperties = Object.defineProperties
-	  , hasOwnProperty = Object.prototype.hasOwnProperty
-	  , descriptor = { configurable: true, enumerable: false, writable: true }
+	var SHARED = '__core-js_shared__';
+	var store$4 = global$1e[SHARED] || setGlobal$2(SHARED, {});
 
-	  , on, once, off, emit, methods, descriptors, base;
+	var sharedStore = store$4;
 
-	on = function (type, listener) {
-		var data;
+	var store$3 = sharedStore;
 
-		validCallable(listener);
+	(shared$5.exports = function (key, value) {
+	  return store$3[key] || (store$3[key] = value !== undefined ? value : {});
+	})('versions', []).push({
+	  version: '3.21.0',
+	  mode: 'global',
+	  copyright: '© 2014-2022 Denis Pushkarev (zloirock.ru)',
+	  license: 'https://github.com/zloirock/core-js/blob/v3.21.0/LICENSE',
+	  source: 'https://github.com/zloirock/core-js'
+	});
+
+	var global$1d = global$1o;
+	var requireObjectCoercible$c = requireObjectCoercible$e;
 
-		if (!hasOwnProperty.call(this, '__ee__')) {
-			data = descriptor.value = create(null);
-			defineProperty(this, '__ee__', descriptor);
-			descriptor.value = null;
-		} else {
-			data = this.__ee__;
-		}
-		if (!data[type]) { data[type] = listener; }
-		else if (typeof data[type] === 'object') { data[type].push(listener); }
-		else { data[type] = [data[type], listener]; }
+	var Object$3 = global$1d.Object;
 
-		return this;
+	// `ToObject` abstract operation
+	// https://tc39.es/ecma262/#sec-toobject
+	var toObject$i = function (argument) {
+	  return Object$3(requireObjectCoercible$c(argument));
 	};
 
-	once = function (type, listener) {
-		var once, self;
+	var uncurryThis$U = functionUncurryThis;
+	var toObject$h = toObject$i;
 
-		validCallable(listener);
-		self = this;
-		on.call(this, type, once = function () {
-			off.call(self, type, once);
-			apply.call(listener, this, arguments);
-		});
+	var hasOwnProperty$3 = uncurryThis$U({}.hasOwnProperty);
 
-		once.__eeOnceListener__ = listener;
-		return this;
+	// `HasOwnProperty` abstract operation
+	// https://tc39.es/ecma262/#sec-hasownproperty
+	var hasOwnProperty_1 = Object.hasOwn || function hasOwn(it, key) {
+	  return hasOwnProperty$3(toObject$h(it), key);
 	};
 
-	off = function (type, listener) {
-		var data, listeners, candidate, i;
-
-		validCallable(listener);
-
-		if (!hasOwnProperty.call(this, '__ee__')) { return this; }
-		data = this.__ee__;
-		if (!data[type]) { return this; }
-		listeners = data[type];
-
-		if (typeof listeners === 'object') {
-			for (i = 0; (candidate = listeners[i]); ++i) {
-				if ((candidate === listener) ||
-						(candidate.__eeOnceListener__ === listener)) {
-					if (listeners.length === 2) { data[type] = listeners[i ? 0 : 1]; }
-					else { listeners.splice(i, 1); }
-				}
-			}
-		} else {
-			if ((listeners === listener) ||
-					(listeners.__eeOnceListener__ === listener)) {
-				delete data[type];
-			}
-		}
-
-		return this;
-	};
+	var uncurryThis$T = functionUncurryThis;
 
-	emit = function (type) {
-		var arguments$1 = arguments;
-
-		var i, l, listener, listeners, args;
-
-		if (!hasOwnProperty.call(this, '__ee__')) { return; }
-		listeners = this.__ee__[type];
-		if (!listeners) { return; }
-
-		if (typeof listeners === 'object') {
-			l = arguments.length;
-			args = new Array(l - 1);
-			for (i = 1; i < l; ++i) { args[i - 1] = arguments$1[i]; }
-
-			listeners = listeners.slice();
-			for (i = 0; (listener = listeners[i]); ++i) {
-				apply.call(listener, this, args);
-			}
-		} else {
-			switch (arguments.length) {
-			case 1:
-				call.call(listeners, this);
-				break;
-			case 2:
-				call.call(listeners, this, arguments[1]);
-				break;
-			case 3:
-				call.call(listeners, this, arguments[1], arguments[2]);
-				break;
-			default:
-				l = arguments.length;
-				args = new Array(l - 1);
-				for (i = 1; i < l; ++i) {
-					args[i - 1] = arguments$1[i];
-				}
-				apply.call(listeners, this, args);
-			}
-		}
-	};
+	var id$2 = 0;
+	var postfix = Math.random();
+	var toString$m = uncurryThis$T(1.0.toString);
 
-	methods = {
-		on: on,
-		once: once,
-		off: off,
-		emit: emit
+	var uid$5 = function (key) {
+	  return 'Symbol(' + (key === undefined ? '' : key) + ')_' + toString$m(++id$2 + postfix, 36);
 	};
 
-	descriptors = {
-		on: d_1(on),
-		once: d_1(once),
-		off: d_1(off),
-		emit: d_1(emit)
-	};
+	var global$1c = global$1o;
+	var shared$4 = shared$5.exports;
+	var hasOwn$l = hasOwnProperty_1;
+	var uid$4 = uid$5;
+	var NATIVE_SYMBOL$2 = nativeSymbol;
+	var USE_SYMBOL_AS_UID = useSymbolAsUid;
 
-	base = defineProperties({}, descriptors);
+	var WellKnownSymbolsStore$1 = shared$4('wks');
+	var Symbol$3 = global$1c.Symbol;
+	var symbolFor = Symbol$3 && Symbol$3['for'];
+	var createWellKnownSymbol = USE_SYMBOL_AS_UID ? Symbol$3 : Symbol$3 && Symbol$3.withoutSetter || uid$4;
 
-	module.exports = exports = function (o) {
-		return (o == null) ? create(base) : defineProperties(Object(o), descriptors);
+	var wellKnownSymbol$t = function (name) {
+	  if (!hasOwn$l(WellKnownSymbolsStore$1, name) || !(NATIVE_SYMBOL$2 || typeof WellKnownSymbolsStore$1[name] == 'string')) {
+	    var description = 'Symbol.' + name;
+	    if (NATIVE_SYMBOL$2 && hasOwn$l(Symbol$3, name)) {
+	      WellKnownSymbolsStore$1[name] = Symbol$3[name];
+	    } else if (USE_SYMBOL_AS_UID && symbolFor) {
+	      WellKnownSymbolsStore$1[name] = symbolFor(description);
+	    } else {
+	      WellKnownSymbolsStore$1[name] = createWellKnownSymbol(description);
+	    }
+	  } return WellKnownSymbolsStore$1[name];
 	};
-	exports.methods = methods;
-	});
 
-	var validTypes = { object: true, symbol: true };
+	var global$1b = global$1o;
+	var call$n = functionCall;
+	var isObject$q = isObject$s;
+	var isSymbol$5 = isSymbol$6;
+	var getMethod$6 = getMethod$7;
+	var ordinaryToPrimitive = ordinaryToPrimitive$1;
+	var wellKnownSymbol$s = wellKnownSymbol$t;
 
-	var isImplemented$7 = function () {
-		var symbol;
-		if (typeof Symbol !== 'function') { return false; }
-		symbol = Symbol('test symbol');
-		try { String(symbol); } catch (e) { return false; }
+	var TypeError$m = global$1b.TypeError;
+	var TO_PRIMITIVE$1 = wellKnownSymbol$s('toPrimitive');
 
-		// Return 'true' also for polyfills
-		if (!validTypes[typeof Symbol.iterator]) { return false; }
-		if (!validTypes[typeof Symbol.toPrimitive]) { return false; }
-		if (!validTypes[typeof Symbol.toStringTag]) { return false; }
-
-		return true;
+	// `ToPrimitive` abstract operation
+	// https://tc39.es/ecma262/#sec-toprimitive
+	var toPrimitive$3 = function (input, pref) {
+	  if (!isObject$q(input) || isSymbol$5(input)) return input;
+	  var exoticToPrim = getMethod$6(input, TO_PRIMITIVE$1);
+	  var result;
+	  if (exoticToPrim) {
+	    if (pref === undefined) pref = 'default';
+	    result = call$n(exoticToPrim, input, pref);
+	    if (!isObject$q(result) || isSymbol$5(result)) return result;
+	    throw TypeError$m("Can't convert object to primitive value");
+	  }
+	  if (pref === undefined) pref = 'number';
+	  return ordinaryToPrimitive(input, pref);
 	};
 
-	var isSymbol = function (x) {
-		if (!x) { return false; }
-		if (typeof x === 'symbol') { return true; }
-		if (!x.constructor) { return false; }
-		if (x.constructor.name !== 'Symbol') { return false; }
-		return (x[x.constructor.toStringTag] === 'Symbol');
-	};
+	var toPrimitive$2 = toPrimitive$3;
+	var isSymbol$4 = isSymbol$6;
 
-	var validateSymbol = function (value) {
-		if (!isSymbol(value)) { throw new TypeError(value + " is not a symbol"); }
-		return value;
+	// `ToPropertyKey` abstract operation
+	// https://tc39.es/ecma262/#sec-topropertykey
+	var toPropertyKey$5 = function (argument) {
+	  var key = toPrimitive$2(argument, 'string');
+	  return isSymbol$4(key) ? key : key + '';
 	};
 
-	var create$3 = Object.create, defineProperties = Object.defineProperties
-	  , defineProperty$1 = Object.defineProperty, objPrototype = Object.prototype
-	  , NativeSymbol, SymbolPolyfill, HiddenSymbol, globalSymbols = create$3(null)
-	  , isNativeSafe;
-
-	if (typeof Symbol === 'function') {
-		NativeSymbol = Symbol;
-		try {
-			String(NativeSymbol());
-			isNativeSafe = true;
-		} catch (ignore) {}
-	}
-
-	var generateName = (function () {
-		var created = create$3(null);
-		return function (desc) {
-			var postfix = 0, name, ie11BugWorkaround;
-			while (created[desc + (postfix || '')]) { ++postfix; }
-			desc += (postfix || '');
-			created[desc] = true;
-			name = '@@' + desc;
-			defineProperty$1(objPrototype, name, d_1.gs(null, function (value) {
-				// For IE11 issue see:
-				// https://connect.microsoft.com/IE/feedbackdetail/view/1928508/
-				//    ie11-broken-getters-on-dom-objects
-				// https://github.com/medikoo/es6-symbol/issues/12
-				if (ie11BugWorkaround) { return; }
-				ie11BugWorkaround = true;
-				defineProperty$1(this, name, d_1(value));
-				ie11BugWorkaround = false;
-			}));
-			return name;
-		};
-	}());
-
-	// Internal constructor (not one exposed) for creating Symbol instances.
-	// This one is used to ensure that `someSymbol instanceof Symbol` always return false
-	HiddenSymbol = function Symbol(description) {
-		if (this instanceof HiddenSymbol) { throw new TypeError('Symbol is not a constructor'); }
-		return SymbolPolyfill(description);
-	};
+	var global$1a = global$1o;
+	var isObject$p = isObject$s;
+
+	var document$3 = global$1a.document;
+	// typeof document.createElement is 'object' in old IE
+	var EXISTS$1 = isObject$p(document$3) && isObject$p(document$3.createElement);
 
-	// Exposed `Symbol` constructor
-	// (returns instances of HiddenSymbol)
-	var polyfill = SymbolPolyfill = function Symbol(description) {
-		var symbol;
-		if (this instanceof Symbol) { throw new TypeError('Symbol is not a constructor'); }
-		if (isNativeSafe) { return NativeSymbol(description); }
-		symbol = create$3(HiddenSymbol.prototype);
-		description = (description === undefined ? '' : String(description));
-		return defineProperties(symbol, {
-			__description__: d_1('', description),
-			__name__: d_1('', generateName(description))
-		});
+	var documentCreateElement$2 = function (it) {
+	  return EXISTS$1 ? document$3.createElement(it) : {};
 	};
-	defineProperties(SymbolPolyfill, {
-		for: d_1(function (key) {
-			if (globalSymbols[key]) { return globalSymbols[key]; }
-			return (globalSymbols[key] = SymbolPolyfill(String(key)));
-		}),
-		keyFor: d_1(function (s) {
-			var key;
-			validateSymbol(s);
-			for (key in globalSymbols) { if (globalSymbols[key] === s) { return key; } }
-		}),
-
-		// To ensure proper interoperability with other native functions (e.g. Array.from)
-		// fallback to eventual native implementation of given symbol
-		hasInstance: d_1('', (NativeSymbol && NativeSymbol.hasInstance) || SymbolPolyfill('hasInstance')),
-		isConcatSpreadable: d_1('', (NativeSymbol && NativeSymbol.isConcatSpreadable) ||
-			SymbolPolyfill('isConcatSpreadable')),
-		iterator: d_1('', (NativeSymbol && NativeSymbol.iterator) || SymbolPolyfill('iterator')),
-		match: d_1('', (NativeSymbol && NativeSymbol.match) || SymbolPolyfill('match')),
-		replace: d_1('', (NativeSymbol && NativeSymbol.replace) || SymbolPolyfill('replace')),
-		search: d_1('', (NativeSymbol && NativeSymbol.search) || SymbolPolyfill('search')),
-		species: d_1('', (NativeSymbol && NativeSymbol.species) || SymbolPolyfill('species')),
-		split: d_1('', (NativeSymbol && NativeSymbol.split) || SymbolPolyfill('split')),
-		toPrimitive: d_1('', (NativeSymbol && NativeSymbol.toPrimitive) || SymbolPolyfill('toPrimitive')),
-		toStringTag: d_1('', (NativeSymbol && NativeSymbol.toStringTag) || SymbolPolyfill('toStringTag')),
-		unscopables: d_1('', (NativeSymbol && NativeSymbol.unscopables) || SymbolPolyfill('unscopables'))
-	});
 
-	// Internal tweaks for real symbol producer
-	defineProperties(HiddenSymbol.prototype, {
-		constructor: d_1(SymbolPolyfill),
-		toString: d_1('', function () { return this.__name__; })
-	});
+	var DESCRIPTORS$p = descriptors;
+	var fails$Q = fails$V;
+	var createElement$1 = documentCreateElement$2;
 
-	// Proper implementation of methods exposed on Symbol.prototype
-	// They won't be accessible on produced symbol instances as they derive from HiddenSymbol.prototype
-	defineProperties(SymbolPolyfill.prototype, {
-		toString: d_1(function () { return 'Symbol (' + validateSymbol(this).__description__ + ')'; }),
-		valueOf: d_1(function () { return validateSymbol(this); })
+	// Thanks to IE8 for its funny defineProperty
+	var ie8DomDefine = !DESCRIPTORS$p && !fails$Q(function () {
+	  // eslint-disable-next-line es/no-object-defineproperty -- required for testing
+	  return Object.defineProperty(createElement$1('div'), 'a', {
+	    get: function () { return 7; }
+	  }).a != 7;
 	});
-	defineProperty$1(SymbolPolyfill.prototype, SymbolPolyfill.toPrimitive, d_1('', function () {
-		var symbol = validateSymbol(this);
-		if (typeof symbol === 'symbol') { return symbol; }
-		return symbol.toString();
-	}));
-	defineProperty$1(SymbolPolyfill.prototype, SymbolPolyfill.toStringTag, d_1('c', 'Symbol'));
 
-	// Proper implementaton of toPrimitive and toStringTag for returned symbol instances
-	defineProperty$1(HiddenSymbol.prototype, SymbolPolyfill.toStringTag,
-		d_1('c', SymbolPolyfill.prototype[SymbolPolyfill.toStringTag]));
+	var DESCRIPTORS$o = descriptors;
+	var call$m = functionCall;
+	var propertyIsEnumerableModule$2 = objectPropertyIsEnumerable;
+	var createPropertyDescriptor$6 = createPropertyDescriptor$7;
+	var toIndexedObject$c = toIndexedObject$d;
+	var toPropertyKey$4 = toPropertyKey$5;
+	var hasOwn$k = hasOwnProperty_1;
+	var IE8_DOM_DEFINE$1 = ie8DomDefine;
+
+	// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	var $getOwnPropertyDescriptor$2 = Object.getOwnPropertyDescriptor;
+
+	// `Object.getOwnPropertyDescriptor` method
+	// https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
+	objectGetOwnPropertyDescriptor.f = DESCRIPTORS$o ? $getOwnPropertyDescriptor$2 : function getOwnPropertyDescriptor(O, P) {
+	  O = toIndexedObject$c(O);
+	  P = toPropertyKey$4(P);
+	  if (IE8_DOM_DEFINE$1) try {
+	    return $getOwnPropertyDescriptor$2(O, P);
+	  } catch (error) { /* empty */ }
+	  if (hasOwn$k(O, P)) return createPropertyDescriptor$6(!call$m(propertyIsEnumerableModule$2.f, O, P), O[P]);
+	};
+
+	var objectDefineProperty = {};
+
+	var DESCRIPTORS$n = descriptors;
+	var fails$P = fails$V;
+
+	// V8 ~ Chrome 36-
+	// https://bugs.chromium.org/p/v8/issues/detail?id=3334
+	var v8PrototypeDefineBug = DESCRIPTORS$n && fails$P(function () {
+	  // eslint-disable-next-line es/no-object-defineproperty -- required for testing
+	  return Object.defineProperty(function () { /* empty */ }, 'prototype', {
+	    value: 42,
+	    writable: false
+	  }).prototype != 42;
+	});
 
-	// Note: It's important to define `toPrimitive` as last one, as some implementations
-	// implement `toPrimitive` natively without implementing `toStringTag` (or other specified symbols)
-	// And that may invoke error in definition flow:
-	// See: https://github.com/medikoo/es6-symbol/issues/13#issuecomment-164146149
-	defineProperty$1(HiddenSymbol.prototype, SymbolPolyfill.toPrimitive,
-		d_1('c', SymbolPolyfill.prototype[SymbolPolyfill.toPrimitive]));
+	var global$19 = global$1o;
+	var isObject$o = isObject$s;
+
+	var String$5 = global$19.String;
+	var TypeError$l = global$19.TypeError;
+
+	// `Assert: Type(argument) is Object`
+	var anObject$n = function (argument) {
+	  if (isObject$o(argument)) return argument;
+	  throw TypeError$l(String$5(argument) + ' is not an object');
+	};
+
+	var global$18 = global$1o;
+	var DESCRIPTORS$m = descriptors;
+	var IE8_DOM_DEFINE = ie8DomDefine;
+	var V8_PROTOTYPE_DEFINE_BUG$1 = v8PrototypeDefineBug;
+	var anObject$m = anObject$n;
+	var toPropertyKey$3 = toPropertyKey$5;
+
+	var TypeError$k = global$18.TypeError;
+	// eslint-disable-next-line es/no-object-defineproperty -- safe
+	var $defineProperty$1 = Object.defineProperty;
+	// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	var $getOwnPropertyDescriptor$1 = Object.getOwnPropertyDescriptor;
+	var ENUMERABLE = 'enumerable';
+	var CONFIGURABLE$1 = 'configurable';
+	var WRITABLE = 'writable';
+
+	// `Object.defineProperty` method
+	// https://tc39.es/ecma262/#sec-object.defineproperty
+	objectDefineProperty.f = DESCRIPTORS$m ? V8_PROTOTYPE_DEFINE_BUG$1 ? function defineProperty(O, P, Attributes) {
+	  anObject$m(O);
+	  P = toPropertyKey$3(P);
+	  anObject$m(Attributes);
+	  if (typeof O === 'function' && P === 'prototype' && 'value' in Attributes && WRITABLE in Attributes && !Attributes[WRITABLE]) {
+	    var current = $getOwnPropertyDescriptor$1(O, P);
+	    if (current && current[WRITABLE]) {
+	      O[P] = Attributes.value;
+	      Attributes = {
+	        configurable: CONFIGURABLE$1 in Attributes ? Attributes[CONFIGURABLE$1] : current[CONFIGURABLE$1],
+	        enumerable: ENUMERABLE in Attributes ? Attributes[ENUMERABLE] : current[ENUMERABLE],
+	        writable: false
+	      };
+	    }
+	  } return $defineProperty$1(O, P, Attributes);
+	} : $defineProperty$1 : function defineProperty(O, P, Attributes) {
+	  anObject$m(O);
+	  P = toPropertyKey$3(P);
+	  anObject$m(Attributes);
+	  if (IE8_DOM_DEFINE) try {
+	    return $defineProperty$1(O, P, Attributes);
+	  } catch (error) { /* empty */ }
+	  if ('get' in Attributes || 'set' in Attributes) throw TypeError$k('Accessors not supported');
+	  if ('value' in Attributes) O[P] = Attributes.value;
+	  return O;
+	};
 
-	var es6Symbol = isImplemented$7() ? Symbol : polyfill;
+	var DESCRIPTORS$l = descriptors;
+	var definePropertyModule$7 = objectDefineProperty;
+	var createPropertyDescriptor$5 = createPropertyDescriptor$7;
 
-	var objToString = Object.prototype.toString
-	  , id = objToString.call((function () { return arguments; })());
+	var createNonEnumerableProperty$b = DESCRIPTORS$l ? function (object, key, value) {
+	  return definePropertyModule$7.f(object, key, createPropertyDescriptor$5(1, value));
+	} : function (object, key, value) {
+	  object[key] = value;
+	  return object;
+	};
 
-	var isArguments = function (value) { return objToString.call(value) === id; };
+	var redefine$h = {exports: {}};
 
-	var objToString$1 = Object.prototype.toString, id$1 = objToString$1.call("");
+	var uncurryThis$S = functionUncurryThis;
+	var isCallable$l = isCallable$r;
+	var store$2 = sharedStore;
 
-	var isString = function (value) {
-		return (
-			typeof value === "string" ||
-			(value &&
-				typeof value === "object" &&
-				(value instanceof String || objToString$1.call(value) === id$1)) ||
-			false
-		);
-	};
+	var functionToString$1 = uncurryThis$S(Function.toString);
 
-	var isImplemented$8 = function () {
-		if (typeof globalThis !== "object") { return false; }
-		if (!globalThis) { return false; }
-		return globalThis.Array === Array;
-	};
+	// this helper broken in `core-js@3.4.1-3.4.4`, so we can't use `shared` helper
+	if (!isCallable$l(store$2.inspectSource)) {
+	  store$2.inspectSource = function (it) {
+	    return functionToString$1(it);
+	  };
+	}
 
-	var naiveFallback = function () {
-		if (typeof self === "object" && self) { return self; }
-		if (typeof window === "object" && window) { return window; }
-		throw new Error("Unable to resolve global `this`");
-	};
+	var inspectSource$4 = store$2.inspectSource;
 
-	var implementation = (function () {
-		if (this) { return this; }
-
-		// Unexpected strict mode (may happen if e.g. bundled into ESM module)
-
-		// Thanks @mathiasbynens -> https://mathiasbynens.be/notes/globalthis
-		// In all ES5+ engines global object inherits from Object.prototype
-		// (if you approached one that doesn't please report)
-		try {
-			Object.defineProperty(Object.prototype, "__global__", {
-				get: function () { return this; },
-				configurable: true
-			});
-		} catch (error) {
-			// Unfortunate case of Object.prototype being sealed (via preventExtensions, seal or freeze)
-			return naiveFallback();
-		}
-		try {
-			// Safari case (window.__global__ is resolved with global context, but __global__ does not)
-			if (!__global__) { return naiveFallback(); }
-			return __global__;
-		} finally {
-			delete Object.prototype.__global__;
-		}
-	})();
+	var global$17 = global$1o;
+	var isCallable$k = isCallable$r;
+	var inspectSource$3 = inspectSource$4;
 
-	var globalThis_1 = isImplemented$8() ? globalThis : implementation;
+	var WeakMap$1 = global$17.WeakMap;
 
-	var validTypes$1 = { object: true, symbol: true };
+	var nativeWeakMap = isCallable$k(WeakMap$1) && /native code/.test(inspectSource$3(WeakMap$1));
 
-	var isImplemented$9 = function () {
-		var Symbol = globalThis_1.Symbol;
-		var symbol;
-		if (typeof Symbol !== "function") { return false; }
-		symbol = Symbol("test symbol");
-		try { String(symbol); }
-		catch (e) { return false; }
+	var shared$3 = shared$5.exports;
+	var uid$3 = uid$5;
 
-		// Return 'true' also for polyfills
-		if (!validTypes$1[typeof Symbol.iterator]) { return false; }
-		if (!validTypes$1[typeof Symbol.toPrimitive]) { return false; }
-		if (!validTypes$1[typeof Symbol.toStringTag]) { return false; }
+	var keys$3 = shared$3('keys');
 
-		return true;
+	var sharedKey$4 = function (key) {
+	  return keys$3[key] || (keys$3[key] = uid$3(key));
 	};
 
-	var isSymbol$1 = function (value) {
-		if (!value) { return false; }
-		if (typeof value === "symbol") { return true; }
-		if (!value.constructor) { return false; }
-		if (value.constructor.name !== "Symbol") { return false; }
-		return value[value.constructor.toStringTag] === "Symbol";
-	};
+	var hiddenKeys$6 = {};
 
-	var validateSymbol$1 = function (value) {
-		if (!isSymbol$1(value)) { throw new TypeError(value + " is not a symbol"); }
-		return value;
-	};
+	var NATIVE_WEAK_MAP = nativeWeakMap;
+	var global$16 = global$1o;
+	var uncurryThis$R = functionUncurryThis;
+	var isObject$n = isObject$s;
+	var createNonEnumerableProperty$a = createNonEnumerableProperty$b;
+	var hasOwn$j = hasOwnProperty_1;
+	var shared$2 = sharedStore;
+	var sharedKey$3 = sharedKey$4;
+	var hiddenKeys$5 = hiddenKeys$6;
 
-	var create$4 = Object.create, defineProperty$2 = Object.defineProperty, objPrototype$1 = Object.prototype;
-
-	var created = create$4(null);
-	var generateName$1 = function (desc) {
-		var postfix = 0, name, ie11BugWorkaround;
-		while (created[desc + (postfix || "")]) { ++postfix; }
-		desc += postfix || "";
-		created[desc] = true;
-		name = "@@" + desc;
-		defineProperty$2(
-			objPrototype$1,
-			name,
-			d_1.gs(null, function (value) {
-				// For IE11 issue see:
-				// https://connect.microsoft.com/IE/feedbackdetail/view/1928508/
-				//    ie11-broken-getters-on-dom-objects
-				// https://github.com/medikoo/es6-symbol/issues/12
-				if (ie11BugWorkaround) { return; }
-				ie11BugWorkaround = true;
-				defineProperty$2(this, name, d_1(value));
-				ie11BugWorkaround = false;
-			})
-		);
-		return name;
-	};
+	var OBJECT_ALREADY_INITIALIZED = 'Object already initialized';
+	var TypeError$j = global$16.TypeError;
+	var WeakMap = global$16.WeakMap;
+	var set$4, get$5, has;
 
-	var NativeSymbol$1 = globalThis_1.Symbol;
-
-	var standardSymbols = function (SymbolPolyfill) {
-		return Object.defineProperties(SymbolPolyfill, {
-			// To ensure proper interoperability with other native functions (e.g. Array.from)
-			// fallback to eventual native implementation of given symbol
-			hasInstance: d_1(
-				"", (NativeSymbol$1 && NativeSymbol$1.hasInstance) || SymbolPolyfill("hasInstance")
-			),
-			isConcatSpreadable: d_1(
-				"",
-				(NativeSymbol$1 && NativeSymbol$1.isConcatSpreadable) ||
-					SymbolPolyfill("isConcatSpreadable")
-			),
-			iterator: d_1("", (NativeSymbol$1 && NativeSymbol$1.iterator) || SymbolPolyfill("iterator")),
-			match: d_1("", (NativeSymbol$1 && NativeSymbol$1.match) || SymbolPolyfill("match")),
-			replace: d_1("", (NativeSymbol$1 && NativeSymbol$1.replace) || SymbolPolyfill("replace")),
-			search: d_1("", (NativeSymbol$1 && NativeSymbol$1.search) || SymbolPolyfill("search")),
-			species: d_1("", (NativeSymbol$1 && NativeSymbol$1.species) || SymbolPolyfill("species")),
-			split: d_1("", (NativeSymbol$1 && NativeSymbol$1.split) || SymbolPolyfill("split")),
-			toPrimitive: d_1(
-				"", (NativeSymbol$1 && NativeSymbol$1.toPrimitive) || SymbolPolyfill("toPrimitive")
-			),
-			toStringTag: d_1(
-				"", (NativeSymbol$1 && NativeSymbol$1.toStringTag) || SymbolPolyfill("toStringTag")
-			),
-			unscopables: d_1(
-				"", (NativeSymbol$1 && NativeSymbol$1.unscopables) || SymbolPolyfill("unscopables")
-			)
-		});
+	var enforce = function (it) {
+	  return has(it) ? get$5(it) : set$4(it, {});
 	};
 
-	var registry = Object.create(null);
-
-	var symbolRegistry = function (SymbolPolyfill) {
-		return Object.defineProperties(SymbolPolyfill, {
-			for: d_1(function (key) {
-				if (registry[key]) { return registry[key]; }
-				return (registry[key] = SymbolPolyfill(String(key)));
-			}),
-			keyFor: d_1(function (symbol) {
-				var key;
-				validateSymbol$1(symbol);
-				for (key in registry) {
-					if (registry[key] === symbol) { return key; }
-				}
-				return undefined;
-			})
-		});
+	var getterFor = function (TYPE) {
+	  return function (it) {
+	    var state;
+	    if (!isObject$n(it) || (state = get$5(it)).type !== TYPE) {
+	      throw TypeError$j('Incompatible receiver, ' + TYPE + ' required');
+	    } return state;
+	  };
 	};
 
-	var NativeSymbol$2         = globalThis_1.Symbol;
-
-	var create$5 = Object.create
-	  , defineProperties$1 = Object.defineProperties
-	  , defineProperty$3 = Object.defineProperty;
+	if (NATIVE_WEAK_MAP || shared$2.state) {
+	  var store$1 = shared$2.state || (shared$2.state = new WeakMap());
+	  var wmget = uncurryThis$R(store$1.get);
+	  var wmhas = uncurryThis$R(store$1.has);
+	  var wmset = uncurryThis$R(store$1.set);
+	  set$4 = function (it, metadata) {
+	    if (wmhas(store$1, it)) throw new TypeError$j(OBJECT_ALREADY_INITIALIZED);
+	    metadata.facade = it;
+	    wmset(store$1, it, metadata);
+	    return metadata;
+	  };
+	  get$5 = function (it) {
+	    return wmget(store$1, it) || {};
+	  };
+	  has = function (it) {
+	    return wmhas(store$1, it);
+	  };
+	} else {
+	  var STATE = sharedKey$3('state');
+	  hiddenKeys$5[STATE] = true;
+	  set$4 = function (it, metadata) {
+	    if (hasOwn$j(it, STATE)) throw new TypeError$j(OBJECT_ALREADY_INITIALIZED);
+	    metadata.facade = it;
+	    createNonEnumerableProperty$a(it, STATE, metadata);
+	    return metadata;
+	  };
+	  get$5 = function (it) {
+	    return hasOwn$j(it, STATE) ? it[STATE] : {};
+	  };
+	  has = function (it) {
+	    return hasOwn$j(it, STATE);
+	  };
+	}
+
+	var internalState = {
+	  set: set$4,
+	  get: get$5,
+	  has: has,
+	  enforce: enforce,
+	  getterFor: getterFor
+	};
+
+	var DESCRIPTORS$k = descriptors;
+	var hasOwn$i = hasOwnProperty_1;
+
+	var FunctionPrototype$2 = Function.prototype;
+	// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	var getDescriptor = DESCRIPTORS$k && Object.getOwnPropertyDescriptor;
+
+	var EXISTS = hasOwn$i(FunctionPrototype$2, 'name');
+	// additional protection from minified / mangled / dropped function names
+	var PROPER = EXISTS && (function something() { /* empty */ }).name === 'something';
+	var CONFIGURABLE = EXISTS && (!DESCRIPTORS$k || (DESCRIPTORS$k && getDescriptor(FunctionPrototype$2, 'name').configurable));
+
+	var functionName = {
+	  EXISTS: EXISTS,
+	  PROPER: PROPER,
+	  CONFIGURABLE: CONFIGURABLE
+	};
+
+	var global$15 = global$1o;
+	var isCallable$j = isCallable$r;
+	var hasOwn$h = hasOwnProperty_1;
+	var createNonEnumerableProperty$9 = createNonEnumerableProperty$b;
+	var setGlobal$1 = setGlobal$3;
+	var inspectSource$2 = inspectSource$4;
+	var InternalStateModule$9 = internalState;
+	var CONFIGURABLE_FUNCTION_NAME$2 = functionName.CONFIGURABLE;
+
+	var getInternalState$7 = InternalStateModule$9.get;
+	var enforceInternalState$1 = InternalStateModule$9.enforce;
+	var TEMPLATE = String(String).split('String');
+
+	(redefine$h.exports = function (O, key, value, options) {
+	  var unsafe = options ? !!options.unsafe : false;
+	  var simple = options ? !!options.enumerable : false;
+	  var noTargetGet = options ? !!options.noTargetGet : false;
+	  var name = options && options.name !== undefined ? options.name : key;
+	  var state;
+	  if (isCallable$j(value)) {
+	    if (String(name).slice(0, 7) === 'Symbol(') {
+	      name = '[' + String(name).replace(/^Symbol\(([^)]*)\)/, '$1') + ']';
+	    }
+	    if (!hasOwn$h(value, 'name') || (CONFIGURABLE_FUNCTION_NAME$2 && value.name !== name)) {
+	      createNonEnumerableProperty$9(value, 'name', name);
+	    }
+	    state = enforceInternalState$1(value);
+	    if (!state.source) {
+	      state.source = TEMPLATE.join(typeof name == 'string' ? name : '');
+	    }
+	  }
+	  if (O === global$15) {
+	    if (simple) O[key] = value;
+	    else setGlobal$1(key, value);
+	    return;
+	  } else if (!unsafe) {
+	    delete O[key];
+	  } else if (!noTargetGet && O[key]) {
+	    simple = true;
+	  }
+	  if (simple) O[key] = value;
+	  else createNonEnumerableProperty$9(O, key, value);
+	// add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative
+	})(Function.prototype, 'toString', function toString() {
+	  return isCallable$j(this) && getInternalState$7(this).source || inspectSource$2(this);
+	});
 
-	var SymbolPolyfill$1, HiddenSymbol$1, isNativeSafe$1;
+	var objectGetOwnPropertyNames = {};
 
-	if (typeof NativeSymbol$2 === "function") {
-		try {
-			String(NativeSymbol$2());
-			isNativeSafe$1 = true;
-		} catch (ignore) {}
-	} else {
-		NativeSymbol$2 = null;
-	}
+	var ceil$1 = Math.ceil;
+	var floor$8 = Math.floor;
 
-	// Internal constructor (not one exposed) for creating Symbol instances.
-	// This one is used to ensure that `someSymbol instanceof Symbol` always return false
-	HiddenSymbol$1 = function Symbol(description) {
-		if (this instanceof HiddenSymbol$1) { throw new TypeError("Symbol is not a constructor"); }
-		return SymbolPolyfill$1(description);
+	// `ToIntegerOrInfinity` abstract operation
+	// https://tc39.es/ecma262/#sec-tointegerorinfinity
+	var toIntegerOrInfinity$b = function (argument) {
+	  var number = +argument;
+	  // eslint-disable-next-line no-self-compare -- safe
+	  return number !== number || number === 0 ? 0 : (number > 0 ? floor$8 : ceil$1)(number);
 	};
 
-	// Exposed `Symbol` constructor
-	// (returns instances of HiddenSymbol)
-	var polyfill$1 = SymbolPolyfill$1 = function Symbol(description) {
-		var symbol;
-		if (this instanceof Symbol) { throw new TypeError("Symbol is not a constructor"); }
-		if (isNativeSafe$1) { return NativeSymbol$2(description); }
-		symbol = create$5(HiddenSymbol$1.prototype);
-		description = description === undefined ? "" : String(description);
-		return defineProperties$1(symbol, {
-			__description__: d_1("", description),
-			__name__: d_1("", generateName$1(description))
-		});
+	var toIntegerOrInfinity$a = toIntegerOrInfinity$b;
+
+	var max$5 = Math.max;
+	var min$9 = Math.min;
+
+	// Helper for a popular repeating case of the spec:
+	// Let integer be ? ToInteger(index).
+	// If integer < 0, let result be max((length + integer), 0); else let result be min(integer, length).
+	var toAbsoluteIndex$9 = function (index, length) {
+	  var integer = toIntegerOrInfinity$a(index);
+	  return integer < 0 ? max$5(integer + length, 0) : min$9(integer, length);
 	};
 
-	standardSymbols(SymbolPolyfill$1);
-	symbolRegistry(SymbolPolyfill$1);
+	var toIntegerOrInfinity$9 = toIntegerOrInfinity$b;
 
-	// Internal tweaks for real symbol producer
-	defineProperties$1(HiddenSymbol$1.prototype, {
-		constructor: d_1(SymbolPolyfill$1),
-		toString: d_1("", function () { return this.__name__; })
-	});
+	var min$8 = Math.min;
 
-	// Proper implementation of methods exposed on Symbol.prototype
-	// They won't be accessible on produced symbol instances as they derive from HiddenSymbol.prototype
-	defineProperties$1(SymbolPolyfill$1.prototype, {
-		toString: d_1(function () { return "Symbol (" + validateSymbol$1(this).__description__ + ")"; }),
-		valueOf: d_1(function () { return validateSymbol$1(this); })
-	});
-	defineProperty$3(
-		SymbolPolyfill$1.prototype,
-		SymbolPolyfill$1.toPrimitive,
-		d_1("", function () {
-			var symbol = validateSymbol$1(this);
-			if (typeof symbol === "symbol") { return symbol; }
-			return symbol.toString();
-		})
-	);
-	defineProperty$3(SymbolPolyfill$1.prototype, SymbolPolyfill$1.toStringTag, d_1("c", "Symbol"));
-
-	// Proper implementaton of toPrimitive and toStringTag for returned symbol instances
-	defineProperty$3(
-		HiddenSymbol$1.prototype, SymbolPolyfill$1.toStringTag,
-		d_1("c", SymbolPolyfill$1.prototype[SymbolPolyfill$1.toStringTag])
-	);
-
-	// Note: It's important to define `toPrimitive` as last one, as some implementations
-	// implement `toPrimitive` natively without implementing `toStringTag` (or other specified symbols)
-	// And that may invoke error in definition flow:
-	// See: https://github.com/medikoo/es6-symbol/issues/13#issuecomment-164146149
-	defineProperty$3(
-		HiddenSymbol$1.prototype, SymbolPolyfill$1.toPrimitive,
-		d_1("c", SymbolPolyfill$1.prototype[SymbolPolyfill$1.toPrimitive])
-	);
-
-	var es6Symbol$1 = isImplemented$9()
-		? globalThis_1.Symbol
-		: polyfill$1;
-
-	var iteratorSymbol = es6Symbol$1.iterator
-	  , isArray        = Array.isArray;
-
-	var isIterable = function (value) {
-		if (!isValue(value)) { return false; }
-		if (isArray(value)) { return true; }
-		if (isString(value)) { return true; }
-		if (isArguments(value)) { return true; }
-		return typeof value[iteratorSymbol] === "function";
+	// `ToLength` abstract operation
+	// https://tc39.es/ecma262/#sec-tolength
+	var toLength$c = function (argument) {
+	  return argument > 0 ? min$8(toIntegerOrInfinity$9(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991
 	};
 
-	var validIterable = function (value) {
-		if (!isIterable(value)) { throw new TypeError(value + " is not iterable"); }
-		return value;
-	};
+	var toLength$b = toLength$c;
 
-	var objectToString = Object.prototype.toString;
-
-	var coerce = function (value) {
-		if (!is(value)) { return null; }
-		if (is$1(value)) {
-			// Reject Object.prototype.toString coercion
-			var valueToString = value.toString;
-			if (typeof valueToString !== "function") { return null; }
-			if (valueToString === objectToString) { return null; }
-			// Note: It can be object coming from other realm, still as there's no ES3 and CSP compliant
-			// way to resolve its realm's Object.prototype.toString it's left as not addressed edge case
-		}
-		try {
-			return "" + value; // Ensure implicit coercion
-		} catch (error) {
-			return null;
-		}
+	// `LengthOfArrayLike` abstract operation
+	// https://tc39.es/ecma262/#sec-lengthofarraylike
+	var lengthOfArrayLike$i = function (obj) {
+	  return toLength$b(obj.length);
 	};
 
-	var safeToString = function (value) {
-		try {
-			return value.toString();
-		} catch (error) {
-			try { return String(value); }
-			catch (error2) { return null; }
-		}
-	};
+	var toIndexedObject$b = toIndexedObject$d;
+	var toAbsoluteIndex$8 = toAbsoluteIndex$9;
+	var lengthOfArrayLike$h = lengthOfArrayLike$i;
 
-	var reNewLine = /[\n\r\u2028\u2029]/g;
-
-	var toShortString = function (value) {
-		var string = safeToString(value);
-		if (string === null) { return "<Non-coercible to string value>"; }
-		// Trim if too long
-		if (string.length > 100) { string = string.slice(0, 99) + "…"; }
-		// Replace eventual new lines
-		string = string.replace(reNewLine, function (char) {
-			switch (char) {
-				case "\n":
-					return "\\n";
-				case "\r":
-					return "\\r";
-				case "\u2028":
-					return "\\u2028";
-				case "\u2029":
-					return "\\u2029";
-				/* istanbul ignore next */
-				default:
-					throw new Error("Unexpected character");
-			}
-		});
-		return string;
+	// `Array.prototype.{ indexOf, includes }` methods implementation
+	var createMethod$6 = function (IS_INCLUDES) {
+	  return function ($this, el, fromIndex) {
+	    var O = toIndexedObject$b($this);
+	    var length = lengthOfArrayLike$h(O);
+	    var index = toAbsoluteIndex$8(fromIndex, length);
+	    var value;
+	    // Array#includes uses SameValueZero equality algorithm
+	    // eslint-disable-next-line no-self-compare -- NaN check
+	    if (IS_INCLUDES && el != el) while (length > index) {
+	      value = O[index++];
+	      // eslint-disable-next-line no-self-compare -- NaN check
+	      if (value != value) return true;
+	    // Array#indexOf ignores holes, Array#includes - not
+	    } else for (;length > index; index++) {
+	      if ((IS_INCLUDES || index in O) && O[index] === el) return IS_INCLUDES || index || 0;
+	    } return !IS_INCLUDES && -1;
+	  };
 	};
 
-	var resolveMessage = function (message, value) {
-		return message.replace("%v", toShortString(value));
+	var arrayIncludes = {
+	  // `Array.prototype.includes` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.includes
+	  includes: createMethod$6(true),
+	  // `Array.prototype.indexOf` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.indexof
+	  indexOf: createMethod$6(false)
 	};
 
-	var resolveException = function (value, defaultMessage, inputOptions) {
-		if (!is$1(inputOptions)) { throw new TypeError(resolveMessage(defaultMessage, value)); }
-		if (!is(value)) {
-			if ("default" in inputOptions) { return inputOptions["default"]; }
-			if (inputOptions.isOptional) { return null; }
-		}
-		var errorMessage = coerce(inputOptions.errorMessage);
-		if (!is(errorMessage)) { errorMessage = defaultMessage; }
-		throw new TypeError(resolveMessage(errorMessage, value));
-	};
+	var uncurryThis$Q = functionUncurryThis;
+	var hasOwn$g = hasOwnProperty_1;
+	var toIndexedObject$a = toIndexedObject$d;
+	var indexOf$1 = arrayIncludes.indexOf;
+	var hiddenKeys$4 = hiddenKeys$6;
 
-	var ensure = function (value/*, options*/) {
-		if (is(value)) { return value; }
-		return resolveException(value, "Cannot use %v", arguments[1]);
-	};
+	var push$a = uncurryThis$Q([].push);
 
-	var ensure$1 = function (value/*, options*/) {
-		if (is$4(value)) { return value; }
-		return resolveException(value, "%v is not a plain function", arguments[1]);
+	var objectKeysInternal = function (object, names) {
+	  var O = toIndexedObject$a(object);
+	  var i = 0;
+	  var result = [];
+	  var key;
+	  for (key in O) !hasOwn$g(hiddenKeys$4, key) && hasOwn$g(O, key) && push$a(result, key);
+	  // Don't enum bug & hidden keys
+	  while (names.length > i) if (hasOwn$g(O, key = names[i++])) {
+	    ~indexOf$1(result, key) || push$a(result, key);
+	  }
+	  return result;
 	};
 
-	var isImplemented$a = function () {
-		var from = Array.from, arr, result;
-		if (typeof from !== "function") { return false; }
-		arr = ["raz", "dwa"];
-		result = from(arr);
-		return Boolean(result && result !== arr && result[1] === "dwa");
-	};
+	// IE8- don't enum bug keys
+	var enumBugKeys$3 = [
+	  'constructor',
+	  'hasOwnProperty',
+	  'isPrototypeOf',
+	  'propertyIsEnumerable',
+	  'toLocaleString',
+	  'toString',
+	  'valueOf'
+	];
 
-	var objToString$2 = Object.prototype.toString
-	  , isFunctionStringTag = RegExp.prototype.test.bind(/^[object [A-Za-z0-9]*Function]$/);
+	var internalObjectKeys$1 = objectKeysInternal;
+	var enumBugKeys$2 = enumBugKeys$3;
 
-	var isFunction = function (value) {
-		return typeof value === "function" && isFunctionStringTag(objToString$2.call(value));
-	};
+	var hiddenKeys$3 = enumBugKeys$2.concat('length', 'prototype');
 
-	var iteratorSymbol$1 = es6Symbol$1.iterator
-	  , isArray$1        = Array.isArray
-	  , call           = Function.prototype.call
-	  , desc           = { configurable: true, enumerable: true, writable: true, value: null }
-	  , defineProperty$4 = Object.defineProperty;
-
-	// eslint-disable-next-line complexity, max-lines-per-function
-	var shim$7 = function (arrayLike/*, mapFn, thisArg*/) {
-		var mapFn = arguments[1]
-		  , thisArg = arguments[2]
-		  , Context
-		  , i
-		  , j
-		  , arr
-		  , length
-		  , code
-		  , iterator
-		  , result
-		  , getIterator
-		  , value;
-
-		arrayLike = Object(validValue(arrayLike));
-
-		if (isValue(mapFn)) { validCallable(mapFn); }
-		if (!this || this === Array || !isFunction(this)) {
-			// Result: Plain array
-			if (!mapFn) {
-				if (isArguments(arrayLike)) {
-					// Source: Arguments
-					length = arrayLike.length;
-					if (length !== 1) { return Array.apply(null, arrayLike); }
-					arr = new Array(1);
-					arr[0] = arrayLike[0];
-					return arr;
-				}
-				if (isArray$1(arrayLike)) {
-					// Source: Array
-					arr = new Array((length = arrayLike.length));
-					for (i = 0; i < length; ++i) { arr[i] = arrayLike[i]; }
-					return arr;
-				}
-			}
-			arr = [];
-		} else {
-			// Result: Non plain array
-			Context = this;
-		}
-
-		if (!isArray$1(arrayLike)) {
-			if ((getIterator = arrayLike[iteratorSymbol$1]) !== undefined) {
-				// Source: Iterator
-				iterator = validCallable(getIterator).call(arrayLike);
-				if (Context) { arr = new Context(); }
-				result = iterator.next();
-				i = 0;
-				while (!result.done) {
-					value = mapFn ? call.call(mapFn, thisArg, result.value, i) : result.value;
-					if (Context) {
-						desc.value = value;
-						defineProperty$4(arr, i, desc);
-					} else {
-						arr[i] = value;
-					}
-					result = iterator.next();
-					++i;
-				}
-				length = i;
-			} else if (isString(arrayLike)) {
-				// Source: String
-				length = arrayLike.length;
-				if (Context) { arr = new Context(); }
-				for (i = 0, j = 0; i < length; ++i) {
-					value = arrayLike[i];
-					if (i + 1 < length) {
-						code = value.charCodeAt(0);
-						// eslint-disable-next-line max-depth
-						if (code >= 0xd800 && code <= 0xdbff) { value += arrayLike[++i]; }
-					}
-					value = mapFn ? call.call(mapFn, thisArg, value, j) : value;
-					if (Context) {
-						desc.value = value;
-						defineProperty$4(arr, j, desc);
-					} else {
-						arr[j] = value;
-					}
-					++j;
-				}
-				length = j;
-			}
-		}
-		if (length === undefined) {
-			// Source: array or array-like
-			length = toPosInteger(arrayLike.length);
-			if (Context) { arr = new Context(length); }
-			for (i = 0; i < length; ++i) {
-				value = mapFn ? call.call(mapFn, thisArg, arrayLike[i], i) : arrayLike[i];
-				if (Context) {
-					desc.value = value;
-					defineProperty$4(arr, i, desc);
-				} else {
-					arr[i] = value;
-				}
-			}
-		}
-		if (Context) {
-			desc.value = null;
-			arr.length = length;
-		}
-		return arr;
+	// `Object.getOwnPropertyNames` method
+	// https://tc39.es/ecma262/#sec-object.getownpropertynames
+	// eslint-disable-next-line es/no-object-getownpropertynames -- safe
+	objectGetOwnPropertyNames.f = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
+	  return internalObjectKeys$1(O, hiddenKeys$3);
 	};
 
-	var from_1 = isImplemented$a() ? Array.from : shim$7;
-
-	var copy = function (obj/*, propertyNames, options*/) {
-		var copy = Object(validValue(obj)), propertyNames = arguments[1], options = Object(arguments[2]);
-		if (copy !== obj && !propertyNames) { return copy; }
-		var result = {};
-		if (propertyNames) {
-			from_1(propertyNames, function (propertyName) {
-				if (options.ensure || propertyName in obj) { result[propertyName] = obj[propertyName]; }
-			});
-		} else {
-			assign(result, obj);
-		}
-		return result;
-	};
+	var objectGetOwnPropertySymbols = {};
 
-	var bind                    = Function.prototype.bind
-	  , call$1                    = Function.prototype.call
-	  , keys$2                    = Object.keys
-	  , objPropertyIsEnumerable = Object.prototype.propertyIsEnumerable;
-
-	var _iterate = function (method, defVal) {
-		return function (obj, cb/*, thisArg, compareFn*/) {
-			var list, thisArg = arguments[2], compareFn = arguments[3];
-			obj = Object(validValue(obj));
-			validCallable(cb);
-
-			list = keys$2(obj);
-			if (compareFn) {
-				list.sort(typeof compareFn === "function" ? bind.call(compareFn, obj) : undefined);
-			}
-			if (typeof method !== "function") { method = list[method]; }
-			return call$1.call(method, list, function (key, index) {
-				if (!objPropertyIsEnumerable.call(obj, key)) { return defVal; }
-				return call$1.call(cb, thisArg, obj[key], key, obj, index);
-			});
-		};
-	};
+	// eslint-disable-next-line es/no-object-getownpropertysymbols -- safe
+	objectGetOwnPropertySymbols.f = Object.getOwnPropertySymbols;
 
-	var forEach$1 = _iterate("forEach");
+	var getBuiltIn$8 = getBuiltIn$b;
+	var uncurryThis$P = functionUncurryThis;
+	var getOwnPropertyNamesModule$2 = objectGetOwnPropertyNames;
+	var getOwnPropertySymbolsModule$2 = objectGetOwnPropertySymbols;
+	var anObject$l = anObject$n;
 
-	var call$2     = Function.prototype.call;
+	var concat$3 = uncurryThis$P([].concat);
 
-	var map$1 = function (obj, cb/*, thisArg*/) {
-		var result = {}, thisArg = arguments[2];
-		validCallable(cb);
-		forEach$1(obj, function (value, key, targetObj, index) {
-			result[key] = call$2.call(cb, thisArg, value, key, targetObj, index);
-		});
-		return result;
+	// all object keys, includes non-enumerable and symbols
+	var ownKeys$1 = getBuiltIn$8('Reflect', 'ownKeys') || function ownKeys(it) {
+	  var keys = getOwnPropertyNamesModule$2.f(anObject$l(it));
+	  var getOwnPropertySymbols = getOwnPropertySymbolsModule$2.f;
+	  return getOwnPropertySymbols ? concat$3(keys, getOwnPropertySymbols(it)) : keys;
 	};
 
-	var bind$1 = Function.prototype.bind
-	  , defineProperty$5 = Object.defineProperty
-	  , hasOwnProperty$1 = Object.prototype.hasOwnProperty
-	  , define;
-
-	define = function (name, desc, options) {
-		var value = ensure(desc) && ensure$1(desc.value), dgs;
-		dgs = copy(desc);
-		delete dgs.writable;
-		delete dgs.value;
-		dgs.get = function () {
-			if (!options.overwriteDefinition && hasOwnProperty$1.call(this, name)) { return value; }
-			desc.value = bind$1.call(value, options.resolveContext ? options.resolveContext(this) : this);
-			defineProperty$5(this, name, desc);
-			return this[name];
-		};
-		return dgs;
-	};
+	var hasOwn$f = hasOwnProperty_1;
+	var ownKeys = ownKeys$1;
+	var getOwnPropertyDescriptorModule$3 = objectGetOwnPropertyDescriptor;
+	var definePropertyModule$6 = objectDefineProperty;
 
-	var autoBind = function (props/*, options*/) {
-		var options = normalizeOptions(arguments[1]);
-		if (is(options.resolveContext)) { ensure$1(options.resolveContext); }
-		return map$1(props, function (desc, name) { return define(name, desc, options); });
+	var copyConstructorProperties$2 = function (target, source, exceptions) {
+	  var keys = ownKeys(source);
+	  var defineProperty = definePropertyModule$6.f;
+	  var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule$3.f;
+	  for (var i = 0; i < keys.length; i++) {
+	    var key = keys[i];
+	    if (!hasOwn$f(target, key) && !(exceptions && hasOwn$f(exceptions, key))) {
+	      defineProperty(target, key, getOwnPropertyDescriptor(source, key));
+	    }
+	  }
 	};
 
-	var defineProperty$6 = Object.defineProperty, defineProperties$2 = Object.defineProperties, Iterator;
-
-	var es6Iterator = Iterator = function (list, context) {
-		if (!(this instanceof Iterator)) { throw new TypeError("Constructor requires 'new'"); }
-		defineProperties$2(this, {
-			__list__: d_1("w", validValue(list)),
-			__context__: d_1("w", context),
-			__nextIndex__: d_1("w", 0)
-		});
-		if (!context) { return; }
-		validCallable(context.on);
-		context.on("_add", this._onAdd);
-		context.on("_delete", this._onDelete);
-		context.on("_clear", this._onClear);
+	var fails$O = fails$V;
+	var isCallable$i = isCallable$r;
+
+	var replacement = /#|\.prototype\./;
+
+	var isForced$5 = function (feature, detection) {
+	  var value = data[normalize$1(feature)];
+	  return value == POLYFILL ? true
+	    : value == NATIVE ? false
+	    : isCallable$i(detection) ? fails$O(detection)
+	    : !!detection;
 	};
 
-	// Internal %IteratorPrototype% doesn't expose its constructor
-	delete Iterator.prototype.constructor;
-
-	defineProperties$2(
-		Iterator.prototype,
-		assign(
-			{
-				_next: d_1(function () {
-					var i;
-					if (!this.__list__) { return undefined; }
-					if (this.__redo__) {
-						i = this.__redo__.shift();
-						if (i !== undefined) { return i; }
-					}
-					if (this.__nextIndex__ < this.__list__.length) { return this.__nextIndex__++; }
-					this._unBind();
-					return undefined;
-				}),
-				next: d_1(function () {
-					return this._createResult(this._next());
-				}),
-				_createResult: d_1(function (i) {
-					if (i === undefined) { return { done: true, value: undefined }; }
-					return { done: false, value: this._resolve(i) };
-				}),
-				_resolve: d_1(function (i) {
-					return this.__list__[i];
-				}),
-				_unBind: d_1(function () {
-					this.__list__ = null;
-					delete this.__redo__;
-					if (!this.__context__) { return; }
-					this.__context__.off("_add", this._onAdd);
-					this.__context__.off("_delete", this._onDelete);
-					this.__context__.off("_clear", this._onClear);
-					this.__context__ = null;
-				}),
-				toString: d_1(function () {
-					return "[object " + (this[es6Symbol$1.toStringTag] || "Object") + "]";
-				})
-			},
-			autoBind({
-				_onAdd: d_1(function (index) {
-					if (index >= this.__nextIndex__) { return; }
-					++this.__nextIndex__;
-					if (!this.__redo__) {
-						defineProperty$6(this, "__redo__", d_1("c", [index]));
-						return;
-					}
-					this.__redo__.forEach(function (redo, i) {
-						if (redo >= index) { this.__redo__[i] = ++redo; }
-					}, this);
-					this.__redo__.push(index);
-				}),
-				_onDelete: d_1(function (index) {
-					var i;
-					if (index >= this.__nextIndex__) { return; }
-					--this.__nextIndex__;
-					if (!this.__redo__) { return; }
-					i = this.__redo__.indexOf(index);
-					if (i !== -1) { this.__redo__.splice(i, 1); }
-					this.__redo__.forEach(function (redo, j) {
-						if (redo > index) { this.__redo__[j] = --redo; }
-					}, this);
-				}),
-				_onClear: d_1(function () {
-					if (this.__redo__) { clear.call(this.__redo__); }
-					this.__nextIndex__ = 0;
-				})
-			})
-		)
-	);
-
-	defineProperty$6(
-		Iterator.prototype,
-		es6Symbol$1.iterator,
-		d_1(function () {
-			return this;
-		})
-	);
-
-	var array = createCommonjsModule(function (module) {
-
-
-
-	var defineProperty = Object.defineProperty, ArrayIterator;
-
-	ArrayIterator = module.exports = function (arr, kind) {
-		if (!(this instanceof ArrayIterator)) { throw new TypeError("Constructor requires 'new'"); }
-		es6Iterator.call(this, arr);
-		if (!kind) { kind = "value"; }
-		else if (contains.call(kind, "key+value")) { kind = "key+value"; }
-		else if (contains.call(kind, "key")) { kind = "key"; }
-		else { kind = "value"; }
-		defineProperty(this, "__kind__", d_1("", kind));
+	var normalize$1 = isForced$5.normalize = function (string) {
+	  return String(string).replace(replacement, '.').toLowerCase();
 	};
-	if (setPrototypeOf) { setPrototypeOf(ArrayIterator, es6Iterator); }
 
-	// Internal %ArrayIteratorPrototype% doesn't expose its constructor
-	delete ArrayIterator.prototype.constructor;
+	var data = isForced$5.data = {};
+	var NATIVE = isForced$5.NATIVE = 'N';
+	var POLYFILL = isForced$5.POLYFILL = 'P';
 
-	ArrayIterator.prototype = Object.create(es6Iterator.prototype, {
-		_resolve: d_1(function (i) {
-			if (this.__kind__ === "value") { return this.__list__[i]; }
-			if (this.__kind__ === "key+value") { return [i, this.__list__[i]]; }
-			return i;
-		})
-	});
-	defineProperty(ArrayIterator.prototype, es6Symbol$1.toStringTag, d_1("c", "Array Iterator"));
-	});
+	var isForced_1 = isForced$5;
 
-	var string = createCommonjsModule(function (module) {
+	var global$14 = global$1o;
+	var getOwnPropertyDescriptor$4 = objectGetOwnPropertyDescriptor.f;
+	var createNonEnumerableProperty$8 = createNonEnumerableProperty$b;
+	var redefine$g = redefine$h.exports;
+	var setGlobal = setGlobal$3;
+	var copyConstructorProperties$1 = copyConstructorProperties$2;
+	var isForced$4 = isForced_1;
 
+	/*
+	  options.target      - name of the target object
+	  options.global      - target is the global object
+	  options.stat        - export as static methods of target
+	  options.proto       - export as prototype methods of target
+	  options.real        - real prototype method for the `pure` version
+	  options.forced      - export even if the native feature is available
+	  options.bind        - bind methods to the target, required for the `pure` version
+	  options.wrap        - wrap constructors to preventing global pollution, required for the `pure` version
+	  options.unsafe      - use the simple assignment of property instead of delete + defineProperty
+	  options.sham        - add a flag to not completely full polyfills
+	  options.enumerable  - export as enumerable property
+	  options.noTargetGet - prevent calling a getter on target
+	  options.name        - the .name of the function if it does not match the key
+	*/
+	var _export = function (options, source) {
+	  var TARGET = options.target;
+	  var GLOBAL = options.global;
+	  var STATIC = options.stat;
+	  var FORCED, target, key, targetProperty, sourceProperty, descriptor;
+	  if (GLOBAL) {
+	    target = global$14;
+	  } else if (STATIC) {
+	    target = global$14[TARGET] || setGlobal(TARGET, {});
+	  } else {
+	    target = (global$14[TARGET] || {}).prototype;
+	  }
+	  if (target) for (key in source) {
+	    sourceProperty = source[key];
+	    if (options.noTargetGet) {
+	      descriptor = getOwnPropertyDescriptor$4(target, key);
+	      targetProperty = descriptor && descriptor.value;
+	    } else targetProperty = target[key];
+	    FORCED = isForced$4(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);
+	    // contained in target
+	    if (!FORCED && targetProperty !== undefined) {
+	      if (typeof sourceProperty == typeof targetProperty) continue;
+	      copyConstructorProperties$1(sourceProperty, targetProperty);
+	    }
+	    // add a flag to not completely full polyfills
+	    if (options.sham || (targetProperty && targetProperty.sham)) {
+	      createNonEnumerableProperty$8(sourceProperty, 'sham', true);
+	    }
+	    // extend global
+	    redefine$g(target, key, sourceProperty, options);
+	  }
+	};
 
+	var $$1e = _export;
+	var global$13 = global$1o;
+	var uncurryThis$O = functionUncurryThis;
 
-	var defineProperty = Object.defineProperty, StringIterator;
+	var Date$1 = global$13.Date;
+	var getTime$2 = uncurryThis$O(Date$1.prototype.getTime);
 
-	StringIterator = module.exports = function (str) {
-		if (!(this instanceof StringIterator)) { throw new TypeError("Constructor requires 'new'"); }
-		str = String(str);
-		es6Iterator.call(this, str);
-		defineProperty(this, "__length__", d_1("", str.length));
-	};
-	if (setPrototypeOf) { setPrototypeOf(StringIterator, es6Iterator); }
-
-	// Internal %ArrayIteratorPrototype% doesn't expose its constructor
-	delete StringIterator.prototype.constructor;
-
-	StringIterator.prototype = Object.create(es6Iterator.prototype, {
-		_next: d_1(function () {
-			if (!this.__list__) { return undefined; }
-			if (this.__nextIndex__ < this.__length__) { return this.__nextIndex__++; }
-			this._unBind();
-			return undefined;
-		}),
-		_resolve: d_1(function (i) {
-			var char = this.__list__[i], code;
-			if (this.__nextIndex__ === this.__length__) { return char; }
-			code = char.charCodeAt(0);
-			if (code >= 0xd800 && code <= 0xdbff) { return char + this.__list__[this.__nextIndex__++]; }
-			return char;
-		})
-	});
-	defineProperty(StringIterator.prototype, es6Symbol$1.toStringTag, d_1("c", "String Iterator"));
+	// `Date.now` method
+	// https://tc39.es/ecma262/#sec-date.now
+	$$1e({ target: 'Date', stat: true }, {
+	  now: function now() {
+	    return getTime$2(new Date$1());
+	  }
 	});
 
-	var iteratorSymbol$2 = es6Symbol$1.iterator;
+	var uncurryThis$N = functionUncurryThis;
+	var redefine$f = redefine$h.exports;
+
+	var DatePrototype$1 = Date.prototype;
+	var INVALID_DATE = 'Invalid Date';
+	var TO_STRING$1 = 'toString';
+	var un$DateToString = uncurryThis$N(DatePrototype$1[TO_STRING$1]);
+	var getTime$1 = uncurryThis$N(DatePrototype$1.getTime);
+
+	// `Date.prototype.toString` method
+	// https://tc39.es/ecma262/#sec-date.prototype.tostring
+	if (String(new Date(NaN)) != INVALID_DATE) {
+	  redefine$f(DatePrototype$1, TO_STRING$1, function toString() {
+	    var value = getTime$1(this);
+	    // eslint-disable-next-line no-self-compare -- NaN check
+	    return value === value ? un$DateToString(this) : INVALID_DATE;
+	  });
+	}
 
-	var get = function (obj) {
-		if (typeof validIterable(obj)[iteratorSymbol$2] === "function") { return obj[iteratorSymbol$2](); }
-		if (isArguments(obj)) { return new array(obj); }
-		if (isString(obj)) { return new string(obj); }
-		return new array(obj);
-	};
+	function _typeof(obj) {
+	  "@babel/helpers - typeof";
 
-	var isArray$2 = Array.isArray, call$3 = Function.prototype.call, some = Array.prototype.some;
-
-	var forOf = function (iterable, cb /*, thisArg*/) {
-		var mode, thisArg = arguments[2], result, doBreak, broken, i, length, char, code;
-		if (isArray$2(iterable) || isArguments(iterable)) { mode = "array"; }
-		else if (isString(iterable)) { mode = "string"; }
-		else { iterable = get(iterable); }
-
-		validCallable(cb);
-		doBreak = function () {
-			broken = true;
-		};
-		if (mode === "array") {
-			some.call(iterable, function (value) {
-				call$3.call(cb, thisArg, value, doBreak);
-				return broken;
-			});
-			return;
-		}
-		if (mode === "string") {
-			length = iterable.length;
-			for (i = 0; i < length; ++i) {
-				char = iterable[i];
-				if (i + 1 < length) {
-					code = char.charCodeAt(0);
-					if (code >= 0xd800 && code <= 0xdbff) { char += iterable[++i]; }
-				}
-				call$3.call(cb, thisArg, char, doBreak);
-				if (broken) { break; }
-			}
-			return;
-		}
-		result = iterable.next();
-
-		while (!result.done) {
-			call$3.call(cb, thisArg, result.value, doBreak);
-			if (broken) { return; }
-			result = iterable.next();
-		}
-	};
+	  return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
+	    return typeof obj;
+	  } : function (obj) {
+	    return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+	  }, _typeof(obj);
+	}
+
+	function _classCallCheck$1(instance, Constructor) {
+	  if (!(instance instanceof Constructor)) {
+	    throw new TypeError("Cannot call a class as a function");
+	  }
+	}
 
-	var iterator = createCommonjsModule(function (module) {
+	function _defineProperties$1(target, props) {
+	  for (var i = 0; i < props.length; i++) {
+	    var descriptor = props[i];
+	    descriptor.enumerable = descriptor.enumerable || false;
+	    descriptor.configurable = true;
+	    if ("value" in descriptor) descriptor.writable = true;
+	    Object.defineProperty(target, descriptor.key, descriptor);
+	  }
+	}
 
-	var toStringTagSymbol = es6Symbol.toStringTag
+	function _createClass$1(Constructor, protoProps, staticProps) {
+	  if (protoProps) _defineProperties$1(Constructor.prototype, protoProps);
+	  if (staticProps) _defineProperties$1(Constructor, staticProps);
+	  Object.defineProperty(Constructor, "prototype", {
+	    writable: false
+	  });
+	  return Constructor;
+	}
 
-	  , defineProperty = Object.defineProperty
-	  , SetIterator;
+	function _defineProperty(obj, key, value) {
+	  if (key in obj) {
+	    Object.defineProperty(obj, key, {
+	      value: value,
+	      enumerable: true,
+	      configurable: true,
+	      writable: true
+	    });
+	  } else {
+	    obj[key] = value;
+	  }
 
-	SetIterator = module.exports = function (set, kind) {
-		if (!(this instanceof SetIterator)) { return new SetIterator(set, kind); }
-		es6Iterator.call(this, set.__setData__, set);
-		if (!kind) { kind = 'value'; }
-		else if (contains.call(kind, 'key+value')) { kind = 'key+value'; }
-		else { kind = 'value'; }
-		defineProperty(this, '__kind__', d_1('', kind));
-	};
-	if (setPrototypeOf) { setPrototypeOf(SetIterator, es6Iterator); }
-
-	SetIterator.prototype = Object.create(es6Iterator.prototype, {
-		constructor: d_1(SetIterator),
-		_resolve: d_1(function (i) {
-			if (this.__kind__ === 'value') { return this.__list__[i]; }
-			return [this.__list__[i], this.__list__[i]];
-		}),
-		toString: d_1(function () { return '[object Set Iterator]'; })
-	});
-	defineProperty(SetIterator.prototype, toStringTagSymbol, d_1('c', 'Set Iterator'));
-	});
+	  return obj;
+	}
 
-	// Exports true if environment provides native `Set` implementation,
-
-	var isNativeImplemented = (function () {
-		if (typeof Set === 'undefined') { return false; }
-		return (Object.prototype.toString.call(Set.prototype) === '[object Set]');
-	}());
-
-	var iterator$1       = validIterable
-
-	  , call$4 = Function.prototype.call
-	  , defineProperty$7 = Object.defineProperty, getPrototypeOf$1 = Object.getPrototypeOf
-	  , SetPoly, getValues, NativeSet;
-
-	if (isNativeImplemented) { NativeSet = Set; }
-
-	var polyfill$2 = SetPoly = function Set(/*iterable*/) {
-		var iterable = arguments[0], self;
-		if (!(this instanceof SetPoly)) { throw new TypeError('Constructor requires \'new\''); }
-		if (isNativeImplemented && setPrototypeOf) { self = setPrototypeOf(new NativeSet(), getPrototypeOf$1(this)); }
-		else { self = this; }
-		if (iterable != null) { iterator$1(iterable); }
-		defineProperty$7(self, '__setData__', d_1('c', []));
-		if (!iterable) { return self; }
-		forOf(iterable, function (value) {
-			if (eIndexOf.call(this, value) !== -1) { return; }
-			this.push(value);
-		}, self.__setData__);
-		return self;
-	};
+	function _slicedToArray(arr, i) {
+	  return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();
+	}
 
-	if (isNativeImplemented) {
-		if (setPrototypeOf) { setPrototypeOf(SetPoly, NativeSet); }
-		SetPoly.prototype = Object.create(NativeSet.prototype, { constructor: d_1(SetPoly) });
-	}
-
-	eventEmitter(Object.defineProperties(SetPoly.prototype, {
-		add: d_1(function (value) {
-			if (this.has(value)) { return this; }
-			this.emit('_add', this.__setData__.push(value) - 1, value);
-			return this;
-		}),
-		clear: d_1(function () {
-			if (!this.__setData__.length) { return; }
-			clear.call(this.__setData__);
-			this.emit('_clear');
-		}),
-		delete: d_1(function (value) {
-			var index = eIndexOf.call(this.__setData__, value);
-			if (index === -1) { return false; }
-			this.__setData__.splice(index, 1);
-			this.emit('_delete', index, value);
-			return true;
-		}),
-		entries: d_1(function () { return new iterator(this, 'key+value'); }),
-		forEach: d_1(function (cb/*, thisArg*/) {
-			var thisArg = arguments[1], iterator, result, value;
-			validCallable(cb);
-			iterator = this.values();
-			result = iterator._next();
-			while (result !== undefined) {
-				value = iterator._resolve(result);
-				call$4.call(cb, thisArg, value, value, this);
-				result = iterator._next();
-			}
-		}),
-		has: d_1(function (value) {
-			return (eIndexOf.call(this.__setData__, value) !== -1);
-		}),
-		keys: d_1(getValues = function () { return this.values(); }),
-		size: d_1.gs(function () { return this.__setData__.length; }),
-		values: d_1(function () { return new iterator(this); }),
-		toString: d_1(function () { return '[object Set]'; })
-	}));
-	defineProperty$7(SetPoly.prototype, es6Symbol.iterator, d_1(getValues));
-	defineProperty$7(SetPoly.prototype, es6Symbol.toStringTag, d_1('c', 'Set'));
-
-	var es6Set = isImplemented() ? Set : polyfill$2;
-
-	var isImplemented$b = function () {
-		var map, iterator, result;
-		if (typeof Map !== 'function') { return false; }
-		try {
-			// WebKit doesn't support arguments and crashes
-			map = new Map([['raz', 'one'], ['dwa', 'two'], ['trzy', 'three']]);
-		} catch (e) {
-			return false;
-		}
-		if (String(map) !== '[object Map]') { return false; }
-		if (map.size !== 3) { return false; }
-		if (typeof map.clear !== 'function') { return false; }
-		if (typeof map.delete !== 'function') { return false; }
-		if (typeof map.entries !== 'function') { return false; }
-		if (typeof map.forEach !== 'function') { return false; }
-		if (typeof map.get !== 'function') { return false; }
-		if (typeof map.has !== 'function') { return false; }
-		if (typeof map.keys !== 'function') { return false; }
-		if (typeof map.set !== 'function') { return false; }
-		if (typeof map.values !== 'function') { return false; }
-
-		iterator = map.entries();
-		result = iterator.next();
-		if (result.done !== false) { return false; }
-		if (!result.value) { return false; }
-		if (result.value[0] !== 'raz') { return false; }
-		if (result.value[1] !== 'one') { return false; }
-
-		return true;
-	};
+	function _toConsumableArray(arr) {
+	  return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread();
+	}
 
-	var forEach$2 = Array.prototype.forEach, create$6 = Object.create;
+	function _arrayWithoutHoles(arr) {
+	  if (Array.isArray(arr)) return _arrayLikeToArray(arr);
+	}
 
-	// eslint-disable-next-line no-unused-vars
-	var primitiveSet = function (arg/*, …args*/) {
-		var set = create$6(null);
-		forEach$2.call(arguments, function (name) { set[name] = true; });
-		return set;
-	};
+	function _arrayWithHoles(arr) {
+	  if (Array.isArray(arr)) return arr;
+	}
 
-	var iteratorKinds = primitiveSet('key',
-		'value', 'key+value');
+	function _iterableToArray(iter) {
+	  if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter);
+	}
 
-	var iterator$2 = createCommonjsModule(function (module) {
+	function _iterableToArrayLimit(arr, i) {
+	  var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"];
 
-	var toStringTagSymbol = es6Symbol$1.toStringTag
+	  if (_i == null) return;
+	  var _arr = [];
+	  var _n = true;
+	  var _d = false;
 
-	  , defineProperties = Object.defineProperties
-	  , unBind = es6Iterator.prototype._unBind
-	  , MapIterator;
+	  var _s, _e;
 
-	MapIterator = module.exports = function (map, kind) {
-		if (!(this instanceof MapIterator)) { return new MapIterator(map, kind); }
-		es6Iterator.call(this, map.__mapKeysData__, map);
-		if (!kind || !iteratorKinds[kind]) { kind = 'key+value'; }
-		defineProperties(this, {
-			__kind__: d_1('', kind),
-			__values__: d_1('w', map.__mapValuesData__)
-		});
-	};
-	if (setPrototypeOf) { setPrototypeOf(MapIterator, es6Iterator); }
-
-	MapIterator.prototype = Object.create(es6Iterator.prototype, {
-		constructor: d_1(MapIterator),
-		_resolve: d_1(function (i) {
-			if (this.__kind__ === 'value') { return this.__values__[i]; }
-			if (this.__kind__ === 'key') { return this.__list__[i]; }
-			return [this.__list__[i], this.__values__[i]];
-		}),
-		_unBind: d_1(function () {
-			this.__values__ = null;
-			unBind.call(this);
-		}),
-		toString: d_1(function () { return '[object Map Iterator]'; })
-	});
-	Object.defineProperty(MapIterator.prototype, toStringTagSymbol,
-		d_1('c', 'Map Iterator'));
-	});
+	  try {
+	    for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) {
+	      _arr.push(_s.value);
 
-	// Exports true if environment provides native `Map` implementation,
-
-	var isNativeImplemented$1 = (function () {
-		if (typeof Map === 'undefined') { return false; }
-		return (Object.prototype.toString.call(new Map()) === '[object Map]');
-	}());
-
-	var iterator$3       = validIterable
-
-	  , call$5 = Function.prototype.call
-	  , defineProperties$3 = Object.defineProperties, getPrototypeOf$2 = Object.getPrototypeOf
-	  , MapPoly;
-
-	var polyfill$3 = MapPoly = function (/*iterable*/) {
-		var iterable = arguments[0], keys, values, self;
-		if (!(this instanceof MapPoly)) { throw new TypeError('Constructor requires \'new\''); }
-		if (isNativeImplemented$1 && setPrototypeOf && (Map !== MapPoly)) {
-			self = setPrototypeOf(new Map(), getPrototypeOf$2(this));
-		} else {
-			self = this;
-		}
-		if (iterable != null) { iterator$3(iterable); }
-		defineProperties$3(self, {
-			__mapKeysData__: d_1('c', keys = []),
-			__mapValuesData__: d_1('c', values = [])
-		});
-		if (!iterable) { return self; }
-		forOf(iterable, function (value) {
-			var key = validValue(value)[0];
-			value = value[1];
-			if (eIndexOf.call(keys, key) !== -1) { return; }
-			keys.push(key);
-			values.push(value);
-		}, self);
-		return self;
-	};
+	      if (i && _arr.length === i) break;
+	    }
+	  } catch (err) {
+	    _d = true;
+	    _e = err;
+	  } finally {
+	    try {
+	      if (!_n && _i["return"] != null) _i["return"]();
+	    } finally {
+	      if (_d) throw _e;
+	    }
+	  }
 
-	if (isNativeImplemented$1) {
-		if (setPrototypeOf) { setPrototypeOf(MapPoly, Map); }
-		MapPoly.prototype = Object.create(Map.prototype, {
-			constructor: d_1(MapPoly)
-		});
-	}
-
-	eventEmitter(defineProperties$3(MapPoly.prototype, {
-		clear: d_1(function () {
-			if (!this.__mapKeysData__.length) { return; }
-			clear.call(this.__mapKeysData__);
-			clear.call(this.__mapValuesData__);
-			this.emit('_clear');
-		}),
-		delete: d_1(function (key) {
-			var index = eIndexOf.call(this.__mapKeysData__, key);
-			if (index === -1) { return false; }
-			this.__mapKeysData__.splice(index, 1);
-			this.__mapValuesData__.splice(index, 1);
-			this.emit('_delete', index, key);
-			return true;
-		}),
-		entries: d_1(function () { return new iterator$2(this, 'key+value'); }),
-		forEach: d_1(function (cb/*, thisArg*/) {
-			var thisArg = arguments[1], iterator, result;
-			validCallable(cb);
-			iterator = this.entries();
-			result = iterator._next();
-			while (result !== undefined) {
-				call$5.call(cb, thisArg, this.__mapValuesData__[result],
-					this.__mapKeysData__[result], this);
-				result = iterator._next();
-			}
-		}),
-		get: d_1(function (key) {
-			var index = eIndexOf.call(this.__mapKeysData__, key);
-			if (index === -1) { return; }
-			return this.__mapValuesData__[index];
-		}),
-		has: d_1(function (key) {
-			return (eIndexOf.call(this.__mapKeysData__, key) !== -1);
-		}),
-		keys: d_1(function () { return new iterator$2(this, 'key'); }),
-		set: d_1(function (key, value) {
-			var index = eIndexOf.call(this.__mapKeysData__, key), emit;
-			if (index === -1) {
-				index = this.__mapKeysData__.push(key) - 1;
-				emit = true;
-			}
-			this.__mapValuesData__[index] = value;
-			if (emit) { this.emit('_add', index, key); }
-			return this;
-		}),
-		size: d_1.gs(function () { return this.__mapKeysData__.length; }),
-		values: d_1(function () { return new iterator$2(this, 'value'); }),
-		toString: d_1(function () { return '[object Map]'; })
-	}));
-	Object.defineProperty(MapPoly.prototype, es6Symbol$1.iterator, d_1(function () {
-		return this.entries();
-	}));
-	Object.defineProperty(MapPoly.prototype, es6Symbol$1.toStringTag, d_1('c', 'Map'));
-
-	var es6Map = isImplemented$b() ? Map : polyfill$3;
-
-	var toStr = Object.prototype.toString;
-
-	var isArguments$1 = function isArguments(value) {
-		var str = toStr.call(value);
-		var isArgs = str === '[object Arguments]';
-		if (!isArgs) {
-			isArgs = str !== '[object Array]' &&
-				value !== null &&
-				typeof value === 'object' &&
-				typeof value.length === 'number' &&
-				value.length >= 0 &&
-				toStr.call(value.callee) === '[object Function]';
-		}
-		return isArgs;
-	};
+	  return _arr;
+	}
 
-	var keysShim;
-	if (!Object.keys) {
-		// modified from https://github.com/es-shims/es5-shim
-		var has = Object.prototype.hasOwnProperty;
-		var toStr$1 = Object.prototype.toString;
-		var isArgs = isArguments$1; // eslint-disable-line global-require
-		var isEnumerable = Object.prototype.propertyIsEnumerable;
-		var hasDontEnumBug = !isEnumerable.call({ toString: null }, 'toString');
-		var hasProtoEnumBug = isEnumerable.call(function () {}, 'prototype');
-		var dontEnums = [
-			'toString',
-			'toLocaleString',
-			'valueOf',
-			'hasOwnProperty',
-			'isPrototypeOf',
-			'propertyIsEnumerable',
-			'constructor'
-		];
-		var equalsConstructorPrototype = function (o) {
-			var ctor = o.constructor;
-			return ctor && ctor.prototype === o;
-		};
-		var excludedKeys = {
-			$applicationCache: true,
-			$console: true,
-			$external: true,
-			$frame: true,
-			$frameElement: true,
-			$frames: true,
-			$innerHeight: true,
-			$innerWidth: true,
-			$onmozfullscreenchange: true,
-			$onmozfullscreenerror: true,
-			$outerHeight: true,
-			$outerWidth: true,
-			$pageXOffset: true,
-			$pageYOffset: true,
-			$parent: true,
-			$scrollLeft: true,
-			$scrollTop: true,
-			$scrollX: true,
-			$scrollY: true,
-			$self: true,
-			$webkitIndexedDB: true,
-			$webkitStorageInfo: true,
-			$window: true
-		};
-		var hasAutomationEqualityBug = (function () {
-			/* global window */
-			if (typeof window === 'undefined') { return false; }
-			for (var k in window) {
-				try {
-					if (!excludedKeys['$' + k] && has.call(window, k) && window[k] !== null && typeof window[k] === 'object') {
-						try {
-							equalsConstructorPrototype(window[k]);
-						} catch (e) {
-							return true;
-						}
-					}
-				} catch (e$1) {
-					return true;
-				}
-			}
-			return false;
-		}());
-		var equalsConstructorPrototypeIfNotBuggy = function (o) {
-			/* global window */
-			if (typeof window === 'undefined' || !hasAutomationEqualityBug) {
-				return equalsConstructorPrototype(o);
-			}
-			try {
-				return equalsConstructorPrototype(o);
-			} catch (e) {
-				return false;
-			}
-		};
-
-		keysShim = function keys(object) {
-			var isObject = object !== null && typeof object === 'object';
-			var isFunction = toStr$1.call(object) === '[object Function]';
-			var isArguments = isArgs(object);
-			var isString = isObject && toStr$1.call(object) === '[object String]';
-			var theKeys = [];
-
-			if (!isObject && !isFunction && !isArguments) {
-				throw new TypeError('Object.keys called on a non-object');
-			}
-
-			var skipProto = hasProtoEnumBug && isFunction;
-			if (isString && object.length > 0 && !has.call(object, 0)) {
-				for (var i = 0; i < object.length; ++i) {
-					theKeys.push(String(i));
-				}
-			}
-
-			if (isArguments && object.length > 0) {
-				for (var j = 0; j < object.length; ++j) {
-					theKeys.push(String(j));
-				}
-			} else {
-				for (var name in object) {
-					if (!(skipProto && name === 'prototype') && has.call(object, name)) {
-						theKeys.push(String(name));
-					}
-				}
-			}
-
-			if (hasDontEnumBug) {
-				var skipConstructor = equalsConstructorPrototypeIfNotBuggy(object);
-
-				for (var k = 0; k < dontEnums.length; ++k) {
-					if (!(skipConstructor && dontEnums[k] === 'constructor') && has.call(object, dontEnums[k])) {
-						theKeys.push(dontEnums[k]);
-					}
-				}
-			}
-			return theKeys;
-		};
-	}
-	var implementation$1 = keysShim;
-
-	var slice = Array.prototype.slice;
-
-
-	var origKeys = Object.keys;
-	var keysShim$1 = origKeys ? function keys(o) { return origKeys(o); } : implementation$1;
-
-	var originalKeys = Object.keys;
-
-	keysShim$1.shim = function shimObjectKeys() {
-		if (Object.keys) {
-			var keysWorksWithArguments = (function () {
-				// Safari 5.0 bug
-				var args = Object.keys(arguments);
-				return args && args.length === arguments.length;
-			}(1, 2));
-			if (!keysWorksWithArguments) {
-				Object.keys = function keys(object) { // eslint-disable-line func-name-matching
-					if (isArguments$1(object)) {
-						return originalKeys(slice.call(object));
-					}
-					return originalKeys(object);
-				};
-			}
-		} else {
-			Object.keys = keysShim$1;
-		}
-		return Object.keys || keysShim$1;
-	};
+	function _unsupportedIterableToArray(o, minLen) {
+	  if (!o) return;
+	  if (typeof o === "string") return _arrayLikeToArray(o, minLen);
+	  var n = Object.prototype.toString.call(o).slice(8, -1);
+	  if (n === "Object" && o.constructor) n = o.constructor.name;
+	  if (n === "Map" || n === "Set") return Array.from(o);
+	  if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
+	}
 
-	var objectKeys = keysShim$1;
+	function _arrayLikeToArray(arr, len) {
+	  if (len == null || len > arr.length) len = arr.length;
 
-	var hasSymbols = typeof Symbol === 'function' && typeof Symbol('foo') === 'symbol';
+	  for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
 
-	var toStr$2 = Object.prototype.toString;
-	var concat = Array.prototype.concat;
-	var origDefineProperty = Object.defineProperty;
+	  return arr2;
+	}
 
-	var isFunction$1 = function (fn) {
-		return typeof fn === 'function' && toStr$2.call(fn) === '[object Function]';
-	};
+	function _nonIterableSpread() {
+	  throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+	}
 
-	var arePropertyDescriptorsSupported = function () {
-		var obj = {};
-		try {
-			origDefineProperty(obj, 'x', { enumerable: false, value: obj });
-			// eslint-disable-next-line no-unused-vars, no-restricted-syntax
-			for (var _ in obj) { // jscs:ignore disallowUnusedVariables
-				return false;
-			}
-			return obj.x === obj;
-		} catch (e) { /* this is IE 8. */
-			return false;
-		}
-	};
-	var supportsDescriptors = origDefineProperty && arePropertyDescriptorsSupported();
-
-	var defineProperty$8 = function (object, name, value, predicate) {
-		if (name in object && (!isFunction$1(predicate) || !predicate())) {
-			return;
-		}
-		if (supportsDescriptors) {
-			origDefineProperty(object, name, {
-				configurable: true,
-				enumerable: false,
-				value: value,
-				writable: true
-			});
-		} else {
-			object[name] = value;
-		}
-	};
+	function _nonIterableRest() {
+	  throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+	}
 
-	var defineProperties$4 = function (object, map) {
-		var predicates = arguments.length > 2 ? arguments[2] : {};
-		var props = objectKeys(map);
-		if (hasSymbols) {
-			props = concat.call(props, Object.getOwnPropertySymbols(map));
-		}
-		for (var i = 0; i < props.length; i += 1) {
-			defineProperty$8(object, props[i], map[props[i]], predicates[props[i]]);
-		}
-	};
+	function _createForOfIteratorHelper(o, allowArrayLike) {
+	  var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"];
 
-	defineProperties$4.supportsDescriptors = !!supportsDescriptors;
+	  if (!it) {
+	    if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
+	      if (it) o = it;
+	      var i = 0;
+
+	      var F = function () {};
 
-	var defineProperties_1 = defineProperties$4;
+	      return {
+	        s: F,
+	        n: function () {
+	          if (i >= o.length) return {
+	            done: true
+	          };
+	          return {
+	            done: false,
+	            value: o[i++]
+	          };
+	        },
+	        e: function (e) {
+	          throw e;
+	        },
+	        f: F
+	      };
+	    }
 
-	/* eslint complexity: [2, 18], max-statements: [2, 33] */
-	var shams = function hasSymbols() {
-		if (typeof Symbol !== 'function' || typeof Object.getOwnPropertySymbols !== 'function') { return false; }
-		if (typeof Symbol.iterator === 'symbol') { return true; }
+	    throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+	  }
 
-		var obj = {};
-		var sym = Symbol('test');
-		var symObj = Object(sym);
-		if (typeof sym === 'string') { return false; }
+	  var normalCompletion = true,
+	      didErr = false,
+	      err;
+	  return {
+	    s: function () {
+	      it = it.call(o);
+	    },
+	    n: function () {
+	      var step = it.next();
+	      normalCompletion = step.done;
+	      return step;
+	    },
+	    e: function (e) {
+	      didErr = true;
+	      err = e;
+	    },
+	    f: function () {
+	      try {
+	        if (!normalCompletion && it.return != null) it.return();
+	      } finally {
+	        if (didErr) throw err;
+	      }
+	    }
+	  };
+	}
 
-		if (Object.prototype.toString.call(sym) !== '[object Symbol]') { return false; }
-		if (Object.prototype.toString.call(symObj) !== '[object Symbol]') { return false; }
+	var $$1d = _export;
+	var global$12 = global$1o;
 
-		// temp disabled per https://github.com/ljharb/object.assign/issues/17
-		// if (sym instanceof Symbol) { return false; }
-		// temp disabled per https://github.com/WebReflection/get-own-property-symbols/issues/4
-		// if (!(symObj instanceof Symbol)) { return false; }
+	// `globalThis` object
+	// https://tc39.es/ecma262/#sec-globalthis
+	$$1d({ global: true }, {
+	  globalThis: global$12
+	});
 
-		// if (typeof Symbol.prototype.toString !== 'function') { return false; }
-		// if (String(sym) !== Symbol.prototype.toString.call(sym)) { return false; }
+	var global$11 = global$1o;
 
-		var symVal = 42;
-		obj[sym] = symVal;
-		for (sym in obj) { return false; } // eslint-disable-line no-restricted-syntax
-		if (typeof Object.keys === 'function' && Object.keys(obj).length !== 0) { return false; }
+	var path$1 = global$11;
 
-		if (typeof Object.getOwnPropertyNames === 'function' && Object.getOwnPropertyNames(obj).length !== 0) { return false; }
+	var wellKnownSymbolWrapped = {};
 
-		var syms = Object.getOwnPropertySymbols(obj);
-		if (syms.length !== 1 || syms[0] !== sym) { return false; }
+	var wellKnownSymbol$r = wellKnownSymbol$t;
 
-		if (!Object.prototype.propertyIsEnumerable.call(obj, sym)) { return false; }
+	wellKnownSymbolWrapped.f = wellKnownSymbol$r;
 
-		if (typeof Object.getOwnPropertyDescriptor === 'function') {
-			var descriptor = Object.getOwnPropertyDescriptor(obj, sym);
-			if (descriptor.value !== symVal || descriptor.enumerable !== true) { return false; }
-		}
+	var path = path$1;
+	var hasOwn$e = hasOwnProperty_1;
+	var wrappedWellKnownSymbolModule$1 = wellKnownSymbolWrapped;
+	var defineProperty$c = objectDefineProperty.f;
 
-		return true;
+	var defineWellKnownSymbol$4 = function (NAME) {
+	  var Symbol = path.Symbol || (path.Symbol = {});
+	  if (!hasOwn$e(Symbol, NAME)) defineProperty$c(Symbol, NAME, {
+	    value: wrappedWellKnownSymbolModule$1.f(NAME)
+	  });
 	};
 
-	var origSymbol = commonjsGlobal.Symbol;
+	var defineWellKnownSymbol$3 = defineWellKnownSymbol$4;
 
+	// `Symbol.iterator` well-known symbol
+	// https://tc39.es/ecma262/#sec-symbol.iterator
+	defineWellKnownSymbol$3('iterator');
 
-	var hasSymbols$1 = function hasNativeSymbols() {
-		if (typeof origSymbol !== 'function') { return false; }
-		if (typeof Symbol !== 'function') { return false; }
-		if (typeof origSymbol('foo') !== 'symbol') { return false; }
-		if (typeof Symbol('bar') !== 'symbol') { return false; }
+	var objectDefineProperties = {};
 
-		return shams();
+	var internalObjectKeys = objectKeysInternal;
+	var enumBugKeys$1 = enumBugKeys$3;
+
+	// `Object.keys` method
+	// https://tc39.es/ecma262/#sec-object.keys
+	// eslint-disable-next-line es/no-object-keys -- safe
+	var objectKeys$4 = Object.keys || function keys(O) {
+	  return internalObjectKeys(O, enumBugKeys$1);
 	};
 
-	/* eslint no-invalid-this: 1 */
+	var DESCRIPTORS$j = descriptors;
+	var V8_PROTOTYPE_DEFINE_BUG = v8PrototypeDefineBug;
+	var definePropertyModule$5 = objectDefineProperty;
+	var anObject$k = anObject$n;
+	var toIndexedObject$9 = toIndexedObject$d;
+	var objectKeys$3 = objectKeys$4;
 
-	var ERROR_MESSAGE = 'Function.prototype.bind called on incompatible ';
-	var slice$1 = Array.prototype.slice;
-	var toStr$3 = Object.prototype.toString;
-	var funcType = '[object Function]';
+	// `Object.defineProperties` method
+	// https://tc39.es/ecma262/#sec-object.defineproperties
+	// eslint-disable-next-line es/no-object-defineproperties -- safe
+	objectDefineProperties.f = DESCRIPTORS$j && !V8_PROTOTYPE_DEFINE_BUG ? Object.defineProperties : function defineProperties(O, Properties) {
+	  anObject$k(O);
+	  var props = toIndexedObject$9(Properties);
+	  var keys = objectKeys$3(Properties);
+	  var length = keys.length;
+	  var index = 0;
+	  var key;
+	  while (length > index) definePropertyModule$5.f(O, key = keys[index++], props[key]);
+	  return O;
+	};
+
+	var getBuiltIn$7 = getBuiltIn$b;
+
+	var html$2 = getBuiltIn$7('document', 'documentElement');
+
+	/* global ActiveXObject -- old IE, WSH */
+
+	var anObject$j = anObject$n;
+	var definePropertiesModule$1 = objectDefineProperties;
+	var enumBugKeys = enumBugKeys$3;
+	var hiddenKeys$2 = hiddenKeys$6;
+	var html$1 = html$2;
+	var documentCreateElement$1 = documentCreateElement$2;
+	var sharedKey$2 = sharedKey$4;
+
+	var GT = '>';
+	var LT = '<';
+	var PROTOTYPE$2 = 'prototype';
+	var SCRIPT = 'script';
+	var IE_PROTO$1 = sharedKey$2('IE_PROTO');
+
+	var EmptyConstructor = function () { /* empty */ };
+
+	var scriptTag = function (content) {
+	  return LT + SCRIPT + GT + content + LT + '/' + SCRIPT + GT;
+	};
+
+	// Create object with fake `null` prototype: use ActiveX Object with cleared prototype
+	var NullProtoObjectViaActiveX = function (activeXDocument) {
+	  activeXDocument.write(scriptTag(''));
+	  activeXDocument.close();
+	  var temp = activeXDocument.parentWindow.Object;
+	  activeXDocument = null; // avoid memory leak
+	  return temp;
+	};
+
+	// Create object with fake `null` prototype: use iframe Object with cleared prototype
+	var NullProtoObjectViaIFrame = function () {
+	  // Thrash, waste and sodomy: IE GC bug
+	  var iframe = documentCreateElement$1('iframe');
+	  var JS = 'java' + SCRIPT + ':';
+	  var iframeDocument;
+	  iframe.style.display = 'none';
+	  html$1.appendChild(iframe);
+	  // https://github.com/zloirock/core-js/issues/475
+	  iframe.src = String(JS);
+	  iframeDocument = iframe.contentWindow.document;
+	  iframeDocument.open();
+	  iframeDocument.write(scriptTag('document.F=Object'));
+	  iframeDocument.close();
+	  return iframeDocument.F;
+	};
+
+	// Check for document.domain and active x support
+	// No need to use active x approach when document.domain is not set
+	// see https://github.com/es-shims/es5-shim/issues/150
+	// variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346
+	// avoid IE GC bug
+	var activeXDocument;
+	var NullProtoObject = function () {
+	  try {
+	    activeXDocument = new ActiveXObject('htmlfile');
+	  } catch (error) { /* ignore */ }
+	  NullProtoObject = typeof document != 'undefined'
+	    ? document.domain && activeXDocument
+	      ? NullProtoObjectViaActiveX(activeXDocument) // old IE
+	      : NullProtoObjectViaIFrame()
+	    : NullProtoObjectViaActiveX(activeXDocument); // WSH
+	  var length = enumBugKeys.length;
+	  while (length--) delete NullProtoObject[PROTOTYPE$2][enumBugKeys[length]];
+	  return NullProtoObject();
+	};
+
+	hiddenKeys$2[IE_PROTO$1] = true;
+
+	// `Object.create` method
+	// https://tc39.es/ecma262/#sec-object.create
+	var objectCreate = Object.create || function create(O, Properties) {
+	  var result;
+	  if (O !== null) {
+	    EmptyConstructor[PROTOTYPE$2] = anObject$j(O);
+	    result = new EmptyConstructor();
+	    EmptyConstructor[PROTOTYPE$2] = null;
+	    // add "__proto__" for Object.getPrototypeOf polyfill
+	    result[IE_PROTO$1] = O;
+	  } else result = NullProtoObject();
+	  return Properties === undefined ? result : definePropertiesModule$1.f(result, Properties);
+	};
+
+	var wellKnownSymbol$q = wellKnownSymbol$t;
+	var create$a = objectCreate;
+	var definePropertyModule$4 = objectDefineProperty;
+
+	var UNSCOPABLES = wellKnownSymbol$q('unscopables');
+	var ArrayPrototype$1 = Array.prototype;
+
+	// Array.prototype[@@unscopables]
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	if (ArrayPrototype$1[UNSCOPABLES] == undefined) {
+	  definePropertyModule$4.f(ArrayPrototype$1, UNSCOPABLES, {
+	    configurable: true,
+	    value: create$a(null)
+	  });
+	}
 
-	var implementation$2 = function bind(that) {
-	    var target = this;
-	    if (typeof target !== 'function' || toStr$3.call(target) !== funcType) {
-	        throw new TypeError(ERROR_MESSAGE + target);
-	    }
-	    var args = slice$1.call(arguments, 1);
+	// add a key to Array.prototype[@@unscopables]
+	var addToUnscopables$6 = function (key) {
+	  ArrayPrototype$1[UNSCOPABLES][key] = true;
+	};
 
-	    var bound;
-	    var binder = function () {
-	        if (this instanceof bound) {
-	            var result = target.apply(
-	                this,
-	                args.concat(slice$1.call(arguments))
-	            );
-	            if (Object(result) === result) {
-	                return result;
-	            }
-	            return this;
-	        } else {
-	            return target.apply(
-	                that,
-	                args.concat(slice$1.call(arguments))
-	            );
-	        }
-	    };
+	var iterators = {};
 
-	    var boundLength = Math.max(0, target.length - args.length);
-	    var boundArgs = [];
-	    for (var i = 0; i < boundLength; i++) {
-	        boundArgs.push('$' + i);
-	    }
+	var fails$N = fails$V;
 
-	    bound = Function('binder', 'return function (' + boundArgs.join(',') + '){ return binder.apply(this,arguments); }')(binder);
+	var correctPrototypeGetter = !fails$N(function () {
+	  function F() { /* empty */ }
+	  F.prototype.constructor = null;
+	  // eslint-disable-next-line es/no-object-getprototypeof -- required for testing
+	  return Object.getPrototypeOf(new F()) !== F.prototype;
+	});
 
-	    if (target.prototype) {
-	        var Empty = function Empty() {};
-	        Empty.prototype = target.prototype;
-	        bound.prototype = new Empty();
-	        Empty.prototype = null;
-	    }
+	var global$10 = global$1o;
+	var hasOwn$d = hasOwnProperty_1;
+	var isCallable$h = isCallable$r;
+	var toObject$g = toObject$i;
+	var sharedKey$1 = sharedKey$4;
+	var CORRECT_PROTOTYPE_GETTER$1 = correctPrototypeGetter;
+
+	var IE_PROTO = sharedKey$1('IE_PROTO');
+	var Object$2 = global$10.Object;
+	var ObjectPrototype$4 = Object$2.prototype;
+
+	// `Object.getPrototypeOf` method
+	// https://tc39.es/ecma262/#sec-object.getprototypeof
+	var objectGetPrototypeOf = CORRECT_PROTOTYPE_GETTER$1 ? Object$2.getPrototypeOf : function (O) {
+	  var object = toObject$g(O);
+	  if (hasOwn$d(object, IE_PROTO)) return object[IE_PROTO];
+	  var constructor = object.constructor;
+	  if (isCallable$h(constructor) && object instanceof constructor) {
+	    return constructor.prototype;
+	  } return object instanceof Object$2 ? ObjectPrototype$4 : null;
+	};
+
+	var fails$M = fails$V;
+	var isCallable$g = isCallable$r;
+	var getPrototypeOf$4 = objectGetPrototypeOf;
+	var redefine$e = redefine$h.exports;
+	var wellKnownSymbol$p = wellKnownSymbol$t;
+
+	var ITERATOR$a = wellKnownSymbol$p('iterator');
+	var BUGGY_SAFARI_ITERATORS$1 = false;
+
+	// `%IteratorPrototype%` object
+	// https://tc39.es/ecma262/#sec-%iteratorprototype%-object
+	var IteratorPrototype$2, PrototypeOfArrayIteratorPrototype, arrayIterator;
+
+	/* eslint-disable es/no-array-prototype-keys -- safe */
+	if ([].keys) {
+	  arrayIterator = [].keys();
+	  // Safari 8 has buggy iterators w/o `next`
+	  if (!('next' in arrayIterator)) BUGGY_SAFARI_ITERATORS$1 = true;
+	  else {
+	    PrototypeOfArrayIteratorPrototype = getPrototypeOf$4(getPrototypeOf$4(arrayIterator));
+	    if (PrototypeOfArrayIteratorPrototype !== Object.prototype) IteratorPrototype$2 = PrototypeOfArrayIteratorPrototype;
+	  }
+	}
 
-	    return bound;
-	};
+	var NEW_ITERATOR_PROTOTYPE = IteratorPrototype$2 == undefined || fails$M(function () {
+	  var test = {};
+	  // FF44- legacy iterators case
+	  return IteratorPrototype$2[ITERATOR$a].call(test) !== test;
+	});
 
-	var functionBind = Function.prototype.bind || implementation$2;
+	if (NEW_ITERATOR_PROTOTYPE) IteratorPrototype$2 = {};
 
-	/* globals
-		Atomics,
-		SharedArrayBuffer,
-	*/
+	// `%IteratorPrototype%[@@iterator]()` method
+	// https://tc39.es/ecma262/#sec-%iteratorprototype%-@@iterator
+	if (!isCallable$g(IteratorPrototype$2[ITERATOR$a])) {
+	  redefine$e(IteratorPrototype$2, ITERATOR$a, function () {
+	    return this;
+	  });
+	}
 
-	var undefined$1;
-
-	var $TypeError = TypeError;
-
-	var $gOPD = Object.getOwnPropertyDescriptor;
-	if ($gOPD) {
-		try {
-			$gOPD({}, '');
-		} catch (e) {
-			$gOPD = null; // this is IE 8, which has a broken gOPD
-		}
-	}
-
-	var throwTypeError = function () { throw new $TypeError(); };
-	var ThrowTypeError = $gOPD
-		? (function () {
-			try {
-				// eslint-disable-next-line no-unused-expressions, no-caller, no-restricted-properties
-				arguments.callee; // IE 8 does not throw here
-				return throwTypeError;
-			} catch (calleeThrows) {
-				try {
-					// IE 8 throws on Object.getOwnPropertyDescriptor(arguments, '')
-					return $gOPD(arguments, 'callee').get;
-				} catch (gOPDthrows) {
-					return throwTypeError;
-				}
-			}
-		}())
-		: throwTypeError;
-
-	var hasSymbols$2 = hasSymbols$1();
-
-	var getProto = Object.getPrototypeOf || function (x) { return x.__proto__; }; // eslint-disable-line no-proto
-	var generatorFunction =  undefined$1;
-	var asyncFunction =  undefined$1;
-	var asyncGenFunction =  undefined$1;
-
-	var TypedArray = typeof Uint8Array === 'undefined' ? undefined$1 : getProto(Uint8Array);
-
-	var INTRINSICS = {
-		'%Array%': Array,
-		'%ArrayBuffer%': typeof ArrayBuffer === 'undefined' ? undefined$1 : ArrayBuffer,
-		'%ArrayBufferPrototype%': typeof ArrayBuffer === 'undefined' ? undefined$1 : ArrayBuffer.prototype,
-		'%ArrayIteratorPrototype%': hasSymbols$2 ? getProto([][Symbol.iterator]()) : undefined$1,
-		'%ArrayPrototype%': Array.prototype,
-		'%ArrayProto_entries%': Array.prototype.entries,
-		'%ArrayProto_forEach%': Array.prototype.forEach,
-		'%ArrayProto_keys%': Array.prototype.keys,
-		'%ArrayProto_values%': Array.prototype.values,
-		'%AsyncFromSyncIteratorPrototype%': undefined$1,
-		'%AsyncFunction%': asyncFunction,
-		'%AsyncFunctionPrototype%':  undefined$1,
-		'%AsyncGenerator%':  undefined$1,
-		'%AsyncGeneratorFunction%': asyncGenFunction,
-		'%AsyncGeneratorPrototype%':  undefined$1,
-		'%AsyncIteratorPrototype%':  undefined$1,
-		'%Atomics%': typeof Atomics === 'undefined' ? undefined$1 : Atomics,
-		'%Boolean%': Boolean,
-		'%BooleanPrototype%': Boolean.prototype,
-		'%DataView%': typeof DataView === 'undefined' ? undefined$1 : DataView,
-		'%DataViewPrototype%': typeof DataView === 'undefined' ? undefined$1 : DataView.prototype,
-		'%Date%': Date,
-		'%DatePrototype%': Date.prototype,
-		'%decodeURI%': decodeURI,
-		'%decodeURIComponent%': decodeURIComponent,
-		'%encodeURI%': encodeURI,
-		'%encodeURIComponent%': encodeURIComponent,
-		'%Error%': Error,
-		'%ErrorPrototype%': Error.prototype,
-		'%eval%': eval, // eslint-disable-line no-eval
-		'%EvalError%': EvalError,
-		'%EvalErrorPrototype%': EvalError.prototype,
-		'%Float32Array%': typeof Float32Array === 'undefined' ? undefined$1 : Float32Array,
-		'%Float32ArrayPrototype%': typeof Float32Array === 'undefined' ? undefined$1 : Float32Array.prototype,
-		'%Float64Array%': typeof Float64Array === 'undefined' ? undefined$1 : Float64Array,
-		'%Float64ArrayPrototype%': typeof Float64Array === 'undefined' ? undefined$1 : Float64Array.prototype,
-		'%Function%': Function,
-		'%FunctionPrototype%': Function.prototype,
-		'%Generator%':  undefined$1,
-		'%GeneratorFunction%': generatorFunction,
-		'%GeneratorPrototype%':  undefined$1,
-		'%Int8Array%': typeof Int8Array === 'undefined' ? undefined$1 : Int8Array,
-		'%Int8ArrayPrototype%': typeof Int8Array === 'undefined' ? undefined$1 : Int8Array.prototype,
-		'%Int16Array%': typeof Int16Array === 'undefined' ? undefined$1 : Int16Array,
-		'%Int16ArrayPrototype%': typeof Int16Array === 'undefined' ? undefined$1 : Int8Array.prototype,
-		'%Int32Array%': typeof Int32Array === 'undefined' ? undefined$1 : Int32Array,
-		'%Int32ArrayPrototype%': typeof Int32Array === 'undefined' ? undefined$1 : Int32Array.prototype,
-		'%isFinite%': isFinite,
-		'%isNaN%': isNaN,
-		'%IteratorPrototype%': hasSymbols$2 ? getProto(getProto([][Symbol.iterator]())) : undefined$1,
-		'%JSON%': typeof JSON === 'object' ? JSON : undefined$1,
-		'%JSONParse%': typeof JSON === 'object' ? JSON.parse : undefined$1,
-		'%Map%': typeof Map === 'undefined' ? undefined$1 : Map,
-		'%MapIteratorPrototype%': typeof Map === 'undefined' || !hasSymbols$2 ? undefined$1 : getProto(new Map()[Symbol.iterator]()),
-		'%MapPrototype%': typeof Map === 'undefined' ? undefined$1 : Map.prototype,
-		'%Math%': Math,
-		'%Number%': Number,
-		'%NumberPrototype%': Number.prototype,
-		'%Object%': Object,
-		'%ObjectPrototype%': Object.prototype,
-		'%ObjProto_toString%': Object.prototype.toString,
-		'%ObjProto_valueOf%': Object.prototype.valueOf,
-		'%parseFloat%': parseFloat,
-		'%parseInt%': parseInt,
-		'%Promise%': typeof Promise === 'undefined' ? undefined$1 : Promise,
-		'%PromisePrototype%': typeof Promise === 'undefined' ? undefined$1 : Promise.prototype,
-		'%PromiseProto_then%': typeof Promise === 'undefined' ? undefined$1 : Promise.prototype.then,
-		'%Promise_all%': typeof Promise === 'undefined' ? undefined$1 : Promise.all,
-		'%Promise_reject%': typeof Promise === 'undefined' ? undefined$1 : Promise.reject,
-		'%Promise_resolve%': typeof Promise === 'undefined' ? undefined$1 : Promise.resolve,
-		'%Proxy%': typeof Proxy === 'undefined' ? undefined$1 : Proxy,
-		'%RangeError%': RangeError,
-		'%RangeErrorPrototype%': RangeError.prototype,
-		'%ReferenceError%': ReferenceError,
-		'%ReferenceErrorPrototype%': ReferenceError.prototype,
-		'%Reflect%': typeof Reflect === 'undefined' ? undefined$1 : Reflect,
-		'%RegExp%': RegExp,
-		'%RegExpPrototype%': RegExp.prototype,
-		'%Set%': typeof Set === 'undefined' ? undefined$1 : Set,
-		'%SetIteratorPrototype%': typeof Set === 'undefined' || !hasSymbols$2 ? undefined$1 : getProto(new Set()[Symbol.iterator]()),
-		'%SetPrototype%': typeof Set === 'undefined' ? undefined$1 : Set.prototype,
-		'%SharedArrayBuffer%': typeof SharedArrayBuffer === 'undefined' ? undefined$1 : SharedArrayBuffer,
-		'%SharedArrayBufferPrototype%': typeof SharedArrayBuffer === 'undefined' ? undefined$1 : SharedArrayBuffer.prototype,
-		'%String%': String,
-		'%StringIteratorPrototype%': hasSymbols$2 ? getProto(''[Symbol.iterator]()) : undefined$1,
-		'%StringPrototype%': String.prototype,
-		'%Symbol%': hasSymbols$2 ? Symbol : undefined$1,
-		'%SymbolPrototype%': hasSymbols$2 ? Symbol.prototype : undefined$1,
-		'%SyntaxError%': SyntaxError,
-		'%SyntaxErrorPrototype%': SyntaxError.prototype,
-		'%ThrowTypeError%': ThrowTypeError,
-		'%TypedArray%': TypedArray,
-		'%TypedArrayPrototype%': TypedArray ? TypedArray.prototype : undefined$1,
-		'%TypeError%': $TypeError,
-		'%TypeErrorPrototype%': $TypeError.prototype,
-		'%Uint8Array%': typeof Uint8Array === 'undefined' ? undefined$1 : Uint8Array,
-		'%Uint8ArrayPrototype%': typeof Uint8Array === 'undefined' ? undefined$1 : Uint8Array.prototype,
-		'%Uint8ClampedArray%': typeof Uint8ClampedArray === 'undefined' ? undefined$1 : Uint8ClampedArray,
-		'%Uint8ClampedArrayPrototype%': typeof Uint8ClampedArray === 'undefined' ? undefined$1 : Uint8ClampedArray.prototype,
-		'%Uint16Array%': typeof Uint16Array === 'undefined' ? undefined$1 : Uint16Array,
-		'%Uint16ArrayPrototype%': typeof Uint16Array === 'undefined' ? undefined$1 : Uint16Array.prototype,
-		'%Uint32Array%': typeof Uint32Array === 'undefined' ? undefined$1 : Uint32Array,
-		'%Uint32ArrayPrototype%': typeof Uint32Array === 'undefined' ? undefined$1 : Uint32Array.prototype,
-		'%URIError%': URIError,
-		'%URIErrorPrototype%': URIError.prototype,
-		'%WeakMap%': typeof WeakMap === 'undefined' ? undefined$1 : WeakMap,
-		'%WeakMapPrototype%': typeof WeakMap === 'undefined' ? undefined$1 : WeakMap.prototype,
-		'%WeakSet%': typeof WeakSet === 'undefined' ? undefined$1 : WeakSet,
-		'%WeakSetPrototype%': typeof WeakSet === 'undefined' ? undefined$1 : WeakSet.prototype
+	var iteratorsCore = {
+	  IteratorPrototype: IteratorPrototype$2,
+	  BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS$1
 	};
 
+	var defineProperty$b = objectDefineProperty.f;
+	var hasOwn$c = hasOwnProperty_1;
+	var wellKnownSymbol$o = wellKnownSymbol$t;
 
-	var $replace = functionBind.call(Function.call, String.prototype.replace);
+	var TO_STRING_TAG$4 = wellKnownSymbol$o('toStringTag');
 
-	/* adapted from https://github.com/lodash/lodash/blob/4.17.15/dist/lodash.js#L6735-L6744 */
-	var rePropName = /[^%.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|%$))/g;
-	var reEscapeChar = /\\(\\)?/g; /** Used to match backslashes in property paths. */
-	var stringToPath = function stringToPath(string) {
-		var result = [];
-		$replace(string, rePropName, function (match, number, quote, subString) {
-			result[result.length] = quote ? $replace(subString, reEscapeChar, '$1') : (number || match);
-		});
-		return result;
+	var setToStringTag$a = function (target, TAG, STATIC) {
+	  if (target && !STATIC) target = target.prototype;
+	  if (target && !hasOwn$c(target, TO_STRING_TAG$4)) {
+	    defineProperty$b(target, TO_STRING_TAG$4, { configurable: true, value: TAG });
+	  }
 	};
-	/* end adaptation */
 
-	var getBaseIntrinsic = function getBaseIntrinsic(name, allowMissing) {
-		if (!(name in INTRINSICS)) {
-			throw new SyntaxError('intrinsic ' + name + ' does not exist!');
-		}
+	var IteratorPrototype$1 = iteratorsCore.IteratorPrototype;
+	var create$9 = objectCreate;
+	var createPropertyDescriptor$4 = createPropertyDescriptor$7;
+	var setToStringTag$9 = setToStringTag$a;
+	var Iterators$4 = iterators;
 
-		// istanbul ignore if // hopefully this is impossible to test :-)
-		if (typeof INTRINSICS[name] === 'undefined' && !allowMissing) {
-			throw new $TypeError('intrinsic ' + name + ' exists, but is not available. Please file an issue!');
-		}
-
-		return INTRINSICS[name];
-	};
+	var returnThis$1 = function () { return this; };
 
-	var GetIntrinsic = function GetIntrinsic(name, allowMissing) {
-		if (typeof name !== 'string' || name.length === 0) {
-			throw new TypeError('intrinsic name must be a non-empty string');
-		}
-		if (arguments.length > 1 && typeof allowMissing !== 'boolean') {
-			throw new TypeError('"allowMissing" argument must be a boolean');
-		}
-
-		var parts = stringToPath(name);
-
-		var value = getBaseIntrinsic('%' + (parts.length > 0 ? parts[0] : '') + '%', allowMissing);
-		for (var i = 1; i < parts.length; i += 1) {
-			if (value != null) {
-				if ($gOPD && (i + 1) >= parts.length) {
-					var desc = $gOPD(value, parts[i]);
-					if (!allowMissing && !(parts[i] in value)) {
-						throw new $TypeError('base intrinsic for ' + name + ' exists, but the property is not available.');
-					}
-					value = desc ? (desc.get || desc.value) : value[parts[i]];
-				} else {
-					value = value[parts[i]];
-				}
-			}
-		}
-		return value;
+	var createIteratorConstructor$2 = function (IteratorConstructor, NAME, next, ENUMERABLE_NEXT) {
+	  var TO_STRING_TAG = NAME + ' Iterator';
+	  IteratorConstructor.prototype = create$9(IteratorPrototype$1, { next: createPropertyDescriptor$4(+!ENUMERABLE_NEXT, next) });
+	  setToStringTag$9(IteratorConstructor, TO_STRING_TAG, false);
+	  Iterators$4[TO_STRING_TAG] = returnThis$1;
+	  return IteratorConstructor;
 	};
 
-	var $TypeError$1 = GetIntrinsic('%TypeError%');
+	var global$$ = global$1o;
+	var isCallable$f = isCallable$r;
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.10
+	var String$4 = global$$.String;
+	var TypeError$i = global$$.TypeError;
 
-	var CheckObjectCoercible = function CheckObjectCoercible(value, optMessage) {
-		if (value == null) {
-			throw new $TypeError$1(optMessage || ('Cannot call method on ' + value));
-		}
-		return value;
+	var aPossiblePrototype$1 = function (argument) {
+	  if (typeof argument == 'object' || isCallable$f(argument)) return argument;
+	  throw TypeError$i("Can't set " + String$4(argument) + ' as a prototype');
 	};
 
-	var RequireObjectCoercible = CheckObjectCoercible;
+	/* eslint-disable no-proto -- safe */
 
-	var $Object = GetIntrinsic('%Object%');
+	var uncurryThis$M = functionUncurryThis;
+	var anObject$i = anObject$n;
+	var aPossiblePrototype = aPossiblePrototype$1;
 
+	// `Object.setPrototypeOf` method
+	// https://tc39.es/ecma262/#sec-object.setprototypeof
+	// Works with __proto__ only. Old v8 can't work with null proto objects.
+	// eslint-disable-next-line es/no-object-setprototypeof -- safe
+	var objectSetPrototypeOf = Object.setPrototypeOf || ('__proto__' in {} ? function () {
+	  var CORRECT_SETTER = false;
+	  var test = {};
+	  var setter;
+	  try {
+	    // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	    setter = uncurryThis$M(Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set);
+	    setter(test, []);
+	    CORRECT_SETTER = test instanceof Array;
+	  } catch (error) { /* empty */ }
+	  return function setPrototypeOf(O, proto) {
+	    anObject$i(O);
+	    aPossiblePrototype(proto);
+	    if (CORRECT_SETTER) setter(O, proto);
+	    else O.__proto__ = proto;
+	    return O;
+	  };
+	}() : undefined);
+
+	var $$1c = _export;
+	var call$l = functionCall;
+	var FunctionName$1 = functionName;
+	var isCallable$e = isCallable$r;
+	var createIteratorConstructor$1 = createIteratorConstructor$2;
+	var getPrototypeOf$3 = objectGetPrototypeOf;
+	var setPrototypeOf$6 = objectSetPrototypeOf;
+	var setToStringTag$8 = setToStringTag$a;
+	var createNonEnumerableProperty$7 = createNonEnumerableProperty$b;
+	var redefine$d = redefine$h.exports;
+	var wellKnownSymbol$n = wellKnownSymbol$t;
+	var Iterators$3 = iterators;
+	var IteratorsCore = iteratorsCore;
+
+	var PROPER_FUNCTION_NAME$3 = FunctionName$1.PROPER;
+	var CONFIGURABLE_FUNCTION_NAME$1 = FunctionName$1.CONFIGURABLE;
+	var IteratorPrototype = IteratorsCore.IteratorPrototype;
+	var BUGGY_SAFARI_ITERATORS = IteratorsCore.BUGGY_SAFARI_ITERATORS;
+	var ITERATOR$9 = wellKnownSymbol$n('iterator');
+	var KEYS = 'keys';
+	var VALUES = 'values';
+	var ENTRIES = 'entries';
+
+	var returnThis = function () { return this; };
+
+	var defineIterator$3 = function (Iterable, NAME, IteratorConstructor, next, DEFAULT, IS_SET, FORCED) {
+	  createIteratorConstructor$1(IteratorConstructor, NAME, next);
+
+	  var getIterationMethod = function (KIND) {
+	    if (KIND === DEFAULT && defaultIterator) return defaultIterator;
+	    if (!BUGGY_SAFARI_ITERATORS && KIND in IterablePrototype) return IterablePrototype[KIND];
+	    switch (KIND) {
+	      case KEYS: return function keys() { return new IteratorConstructor(this, KIND); };
+	      case VALUES: return function values() { return new IteratorConstructor(this, KIND); };
+	      case ENTRIES: return function entries() { return new IteratorConstructor(this, KIND); };
+	    } return function () { return new IteratorConstructor(this); };
+	  };
+
+	  var TO_STRING_TAG = NAME + ' Iterator';
+	  var INCORRECT_VALUES_NAME = false;
+	  var IterablePrototype = Iterable.prototype;
+	  var nativeIterator = IterablePrototype[ITERATOR$9]
+	    || IterablePrototype['@@iterator']
+	    || DEFAULT && IterablePrototype[DEFAULT];
+	  var defaultIterator = !BUGGY_SAFARI_ITERATORS && nativeIterator || getIterationMethod(DEFAULT);
+	  var anyNativeIterator = NAME == 'Array' ? IterablePrototype.entries || nativeIterator : nativeIterator;
+	  var CurrentIteratorPrototype, methods, KEY;
+
+	  // fix native
+	  if (anyNativeIterator) {
+	    CurrentIteratorPrototype = getPrototypeOf$3(anyNativeIterator.call(new Iterable()));
+	    if (CurrentIteratorPrototype !== Object.prototype && CurrentIteratorPrototype.next) {
+	      if (getPrototypeOf$3(CurrentIteratorPrototype) !== IteratorPrototype) {
+	        if (setPrototypeOf$6) {
+	          setPrototypeOf$6(CurrentIteratorPrototype, IteratorPrototype);
+	        } else if (!isCallable$e(CurrentIteratorPrototype[ITERATOR$9])) {
+	          redefine$d(CurrentIteratorPrototype, ITERATOR$9, returnThis);
+	        }
+	      }
+	      // Set @@toStringTag to native iterators
+	      setToStringTag$8(CurrentIteratorPrototype, TO_STRING_TAG, true);
+	    }
+	  }
 
+	  // fix Array.prototype.{ values, @@iterator }.name in V8 / FF
+	  if (PROPER_FUNCTION_NAME$3 && DEFAULT == VALUES && nativeIterator && nativeIterator.name !== VALUES) {
+	    if (CONFIGURABLE_FUNCTION_NAME$1) {
+	      createNonEnumerableProperty$7(IterablePrototype, 'name', VALUES);
+	    } else {
+	      INCORRECT_VALUES_NAME = true;
+	      defaultIterator = function values() { return call$l(nativeIterator, this); };
+	    }
+	  }
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-toobject
+	  // export additional methods
+	  if (DEFAULT) {
+	    methods = {
+	      values: getIterationMethod(VALUES),
+	      keys: IS_SET ? defaultIterator : getIterationMethod(KEYS),
+	      entries: getIterationMethod(ENTRIES)
+	    };
+	    if (FORCED) for (KEY in methods) {
+	      if (BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME || !(KEY in IterablePrototype)) {
+	        redefine$d(IterablePrototype, KEY, methods[KEY]);
+	      }
+	    } else $$1c({ target: NAME, proto: true, forced: BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME }, methods);
+	  }
+
+	  // define iterator
+	  if (IterablePrototype[ITERATOR$9] !== defaultIterator) {
+	    redefine$d(IterablePrototype, ITERATOR$9, defaultIterator, { name: DEFAULT });
+	  }
+	  Iterators$3[NAME] = defaultIterator;
+
+	  return methods;
+	};
+
+	var toIndexedObject$8 = toIndexedObject$d;
+	var addToUnscopables$5 = addToUnscopables$6;
+	var Iterators$2 = iterators;
+	var InternalStateModule$8 = internalState;
+	var defineProperty$a = objectDefineProperty.f;
+	var defineIterator$2 = defineIterator$3;
+	var DESCRIPTORS$i = descriptors;
+
+	var ARRAY_ITERATOR = 'Array Iterator';
+	var setInternalState$8 = InternalStateModule$8.set;
+	var getInternalState$6 = InternalStateModule$8.getterFor(ARRAY_ITERATOR);
+
+	// `Array.prototype.entries` method
+	// https://tc39.es/ecma262/#sec-array.prototype.entries
+	// `Array.prototype.keys` method
+	// https://tc39.es/ecma262/#sec-array.prototype.keys
+	// `Array.prototype.values` method
+	// https://tc39.es/ecma262/#sec-array.prototype.values
+	// `Array.prototype[@@iterator]` method
+	// https://tc39.es/ecma262/#sec-array.prototype-@@iterator
+	// `CreateArrayIterator` internal method
+	// https://tc39.es/ecma262/#sec-createarrayiterator
+	var es_array_iterator = defineIterator$2(Array, 'Array', function (iterated, kind) {
+	  setInternalState$8(this, {
+	    type: ARRAY_ITERATOR,
+	    target: toIndexedObject$8(iterated), // target
+	    index: 0,                          // next index
+	    kind: kind                         // kind
+	  });
+	// `%ArrayIteratorPrototype%.next` method
+	// https://tc39.es/ecma262/#sec-%arrayiteratorprototype%.next
+	}, function () {
+	  var state = getInternalState$6(this);
+	  var target = state.target;
+	  var kind = state.kind;
+	  var index = state.index++;
+	  if (!target || index >= target.length) {
+	    state.target = undefined;
+	    return { value: undefined, done: true };
+	  }
+	  if (kind == 'keys') return { value: index, done: false };
+	  if (kind == 'values') return { value: target[index], done: false };
+	  return { value: [index, target[index]], done: false };
+	}, 'values');
+
+	// argumentsList[@@iterator] is %ArrayProto_values%
+	// https://tc39.es/ecma262/#sec-createunmappedargumentsobject
+	// https://tc39.es/ecma262/#sec-createmappedargumentsobject
+	var values = Iterators$2.Arguments = Iterators$2.Array;
+
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables$5('keys');
+	addToUnscopables$5('values');
+	addToUnscopables$5('entries');
+
+	// V8 ~ Chrome 45- bug
+	if (DESCRIPTORS$i && values.name !== 'values') try {
+	  defineProperty$a(values, 'name', { value: 'values' });
+	} catch (error) { /* empty */ }
+
+	var wellKnownSymbol$m = wellKnownSymbol$t;
+
+	var TO_STRING_TAG$3 = wellKnownSymbol$m('toStringTag');
+	var test$2 = {};
+
+	test$2[TO_STRING_TAG$3] = 'z';
+
+	var toStringTagSupport = String(test$2) === '[object z]';
+
+	var global$_ = global$1o;
+	var TO_STRING_TAG_SUPPORT$2 = toStringTagSupport;
+	var isCallable$d = isCallable$r;
+	var classofRaw = classofRaw$1;
+	var wellKnownSymbol$l = wellKnownSymbol$t;
+
+	var TO_STRING_TAG$2 = wellKnownSymbol$l('toStringTag');
+	var Object$1 = global$_.Object;
+
+	// ES3 wrong here
+	var CORRECT_ARGUMENTS = classofRaw(function () { return arguments; }()) == 'Arguments';
+
+	// fallback for IE11 Script Access Denied error
+	var tryGet = function (it, key) {
+	  try {
+	    return it[key];
+	  } catch (error) { /* empty */ }
+	};
+
+	// getting tag from ES6+ `Object.prototype.toString`
+	var classof$d = TO_STRING_TAG_SUPPORT$2 ? classofRaw : function (it) {
+	  var O, tag, result;
+	  return it === undefined ? 'Undefined' : it === null ? 'Null'
+	    // @@toStringTag case
+	    : typeof (tag = tryGet(O = Object$1(it), TO_STRING_TAG$2)) == 'string' ? tag
+	    // builtinTag case
+	    : CORRECT_ARGUMENTS ? classofRaw(O)
+	    // ES3 arguments fallback
+	    : (result = classofRaw(O)) == 'Object' && isCallable$d(O.callee) ? 'Arguments' : result;
+	};
+
+	var TO_STRING_TAG_SUPPORT$1 = toStringTagSupport;
+	var classof$c = classof$d;
+
+	// `Object.prototype.toString` method implementation
+	// https://tc39.es/ecma262/#sec-object.prototype.tostring
+	var objectToString$1 = TO_STRING_TAG_SUPPORT$1 ? {}.toString : function toString() {
+	  return '[object ' + classof$c(this) + ']';
+	};
+
+	var TO_STRING_TAG_SUPPORT = toStringTagSupport;
+	var redefine$c = redefine$h.exports;
+	var toString$l = objectToString$1;
+
+	// `Object.prototype.toString` method
+	// https://tc39.es/ecma262/#sec-object.prototype.tostring
+	if (!TO_STRING_TAG_SUPPORT) {
+	  redefine$c(Object.prototype, 'toString', toString$l, { unsafe: true });
+	}
+
+	var global$Z = global$1o;
+	var classof$b = classof$d;
+
+	var String$3 = global$Z.String;
+
+	var toString$k = function (argument) {
+	  if (classof$b(argument) === 'Symbol') throw TypeError('Cannot convert a Symbol value to a string');
+	  return String$3(argument);
+	};
+
+	var uncurryThis$L = functionUncurryThis;
+	var toIntegerOrInfinity$8 = toIntegerOrInfinity$b;
+	var toString$j = toString$k;
+	var requireObjectCoercible$b = requireObjectCoercible$e;
+
+	var charAt$8 = uncurryThis$L(''.charAt);
+	var charCodeAt$2 = uncurryThis$L(''.charCodeAt);
+	var stringSlice$b = uncurryThis$L(''.slice);
+
+	var createMethod$5 = function (CONVERT_TO_STRING) {
+	  return function ($this, pos) {
+	    var S = toString$j(requireObjectCoercible$b($this));
+	    var position = toIntegerOrInfinity$8(pos);
+	    var size = S.length;
+	    var first, second;
+	    if (position < 0 || position >= size) return CONVERT_TO_STRING ? '' : undefined;
+	    first = charCodeAt$2(S, position);
+	    return first < 0xD800 || first > 0xDBFF || position + 1 === size
+	      || (second = charCodeAt$2(S, position + 1)) < 0xDC00 || second > 0xDFFF
+	        ? CONVERT_TO_STRING
+	          ? charAt$8(S, position)
+	          : first
+	        : CONVERT_TO_STRING
+	          ? stringSlice$b(S, position, position + 2)
+	          : (first - 0xD800 << 10) + (second - 0xDC00) + 0x10000;
+	  };
+	};
+
+	var stringMultibyte = {
+	  // `String.prototype.codePointAt` method
+	  // https://tc39.es/ecma262/#sec-string.prototype.codepointat
+	  codeAt: createMethod$5(false),
+	  // `String.prototype.at` method
+	  // https://github.com/mathiasbynens/String.prototype.at
+	  charAt: createMethod$5(true)
+	};
+
+	var charAt$7 = stringMultibyte.charAt;
+	var toString$i = toString$k;
+	var InternalStateModule$7 = internalState;
+	var defineIterator$1 = defineIterator$3;
+
+	var STRING_ITERATOR = 'String Iterator';
+	var setInternalState$7 = InternalStateModule$7.set;
+	var getInternalState$5 = InternalStateModule$7.getterFor(STRING_ITERATOR);
+
+	// `String.prototype[@@iterator]` method
+	// https://tc39.es/ecma262/#sec-string.prototype-@@iterator
+	defineIterator$1(String, 'String', function (iterated) {
+	  setInternalState$7(this, {
+	    type: STRING_ITERATOR,
+	    string: toString$i(iterated),
+	    index: 0
+	  });
+	// `%StringIteratorPrototype%.next` method
+	// https://tc39.es/ecma262/#sec-%stringiteratorprototype%.next
+	}, function next() {
+	  var state = getInternalState$5(this);
+	  var string = state.string;
+	  var index = state.index;
+	  var point;
+	  if (index >= string.length) return { value: undefined, done: true };
+	  point = charAt$7(string, index);
+	  state.index += point.length;
+	  return { value: point, done: false };
+	});
 
-	var ToObject = function ToObject(value) {
-		RequireObjectCoercible(value);
-		return $Object(value);
+	// iterable DOM collections
+	// flag - `iterable` interface - 'entries', 'keys', 'values', 'forEach' methods
+	var domIterables = {
+	  CSSRuleList: 0,
+	  CSSStyleDeclaration: 0,
+	  CSSValueList: 0,
+	  ClientRectList: 0,
+	  DOMRectList: 0,
+	  DOMStringList: 0,
+	  DOMTokenList: 1,
+	  DataTransferItemList: 0,
+	  FileList: 0,
+	  HTMLAllCollection: 0,
+	  HTMLCollection: 0,
+	  HTMLFormElement: 0,
+	  HTMLSelectElement: 0,
+	  MediaList: 0,
+	  MimeTypeArray: 0,
+	  NamedNodeMap: 0,
+	  NodeList: 1,
+	  PaintRequestList: 0,
+	  Plugin: 0,
+	  PluginArray: 0,
+	  SVGLengthList: 0,
+	  SVGNumberList: 0,
+	  SVGPathSegList: 0,
+	  SVGPointList: 0,
+	  SVGStringList: 0,
+	  SVGTransformList: 0,
+	  SourceBufferList: 0,
+	  StyleSheetList: 0,
+	  TextTrackCueList: 0,
+	  TextTrackList: 0,
+	  TouchList: 0
+	};
+
+	// in old WebKit versions, `element.classList` is not an instance of global `DOMTokenList`
+	var documentCreateElement = documentCreateElement$2;
+
+	var classList$1 = documentCreateElement('span').classList;
+	var DOMTokenListPrototype$2 = classList$1 && classList$1.constructor && classList$1.constructor.prototype;
+
+	var domTokenListPrototype = DOMTokenListPrototype$2 === Object.prototype ? undefined : DOMTokenListPrototype$2;
+
+	var global$Y = global$1o;
+	var DOMIterables$1 = domIterables;
+	var DOMTokenListPrototype$1 = domTokenListPrototype;
+	var ArrayIteratorMethods = es_array_iterator;
+	var createNonEnumerableProperty$6 = createNonEnumerableProperty$b;
+	var wellKnownSymbol$k = wellKnownSymbol$t;
+
+	var ITERATOR$8 = wellKnownSymbol$k('iterator');
+	var TO_STRING_TAG$1 = wellKnownSymbol$k('toStringTag');
+	var ArrayValues = ArrayIteratorMethods.values;
+
+	var handlePrototype$1 = function (CollectionPrototype, COLLECTION_NAME) {
+	  if (CollectionPrototype) {
+	    // some Chrome versions have non-configurable methods on DOMTokenList
+	    if (CollectionPrototype[ITERATOR$8] !== ArrayValues) try {
+	      createNonEnumerableProperty$6(CollectionPrototype, ITERATOR$8, ArrayValues);
+	    } catch (error) {
+	      CollectionPrototype[ITERATOR$8] = ArrayValues;
+	    }
+	    if (!CollectionPrototype[TO_STRING_TAG$1]) {
+	      createNonEnumerableProperty$6(CollectionPrototype, TO_STRING_TAG$1, COLLECTION_NAME);
+	    }
+	    if (DOMIterables$1[COLLECTION_NAME]) for (var METHOD_NAME in ArrayIteratorMethods) {
+	      // some Chrome versions have non-configurable methods on DOMTokenList
+	      if (CollectionPrototype[METHOD_NAME] !== ArrayIteratorMethods[METHOD_NAME]) try {
+	        createNonEnumerableProperty$6(CollectionPrototype, METHOD_NAME, ArrayIteratorMethods[METHOD_NAME]);
+	      } catch (error) {
+	        CollectionPrototype[METHOD_NAME] = ArrayIteratorMethods[METHOD_NAME];
+	      }
+	    }
+	  }
 	};
 
-	var $Math = GetIntrinsic('%Math%');
-	var $Number = GetIntrinsic('%Number%');
+	for (var COLLECTION_NAME$1 in DOMIterables$1) {
+	  handlePrototype$1(global$Y[COLLECTION_NAME$1] && global$Y[COLLECTION_NAME$1].prototype, COLLECTION_NAME$1);
+	}
+
+	handlePrototype$1(DOMTokenListPrototype$1, 'DOMTokenList');
 
-	var maxSafeInteger = $Number.MAX_SAFE_INTEGER || $Math.pow(2, 53) - 1;
+	var NATIVE_BIND$2 = functionBindNative;
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.3
+	var FunctionPrototype$1 = Function.prototype;
+	var apply$9 = FunctionPrototype$1.apply;
+	var call$k = FunctionPrototype$1.call;
 
-	var ToNumber = function ToNumber(value) {
-		return +value; // eslint-disable-line no-implicit-coercion
-	};
+	// eslint-disable-next-line es/no-reflect -- safe
+	var functionApply = typeof Reflect == 'object' && Reflect.apply || (NATIVE_BIND$2 ? call$k.bind(apply$9) : function () {
+	  return call$k.apply(apply$9, arguments);
+	});
+
+	var classof$a = classofRaw$1;
 
-	var _isNaN = Number.isNaN || function isNaN(a) {
-		return a !== a;
+	// `IsArray` abstract operation
+	// https://tc39.es/ecma262/#sec-isarray
+	// eslint-disable-next-line es/no-array-isarray -- safe
+	var isArray$8 = Array.isArray || function isArray(argument) {
+	  return classof$a(argument) == 'Array';
 	};
 
-	var $isNaN = Number.isNaN || function (a) { return a !== a; };
+	var objectGetOwnPropertyNamesExternal = {};
 
-	var _isFinite = Number.isFinite || function (x) { return typeof x === 'number' && !$isNaN(x) && x !== Infinity && x !== -Infinity; };
+	var toPropertyKey$2 = toPropertyKey$5;
+	var definePropertyModule$3 = objectDefineProperty;
+	var createPropertyDescriptor$3 = createPropertyDescriptor$7;
 
-	var sign$1 = function sign(number) {
-		return number >= 0 ? 1 : -1;
+	var createProperty$5 = function (object, key, value) {
+	  var propertyKey = toPropertyKey$2(key);
+	  if (propertyKey in object) definePropertyModule$3.f(object, propertyKey, createPropertyDescriptor$3(0, value));
+	  else object[propertyKey] = value;
 	};
 
-	var $Math$1 = GetIntrinsic('%Math%');
-
+	var global$X = global$1o;
+	var toAbsoluteIndex$7 = toAbsoluteIndex$9;
+	var lengthOfArrayLike$g = lengthOfArrayLike$i;
+	var createProperty$4 = createProperty$5;
 
+	var Array$7 = global$X.Array;
+	var max$4 = Math.max;
 
+	var arraySliceSimple = function (O, start, end) {
+	  var length = lengthOfArrayLike$g(O);
+	  var k = toAbsoluteIndex$7(start, length);
+	  var fin = toAbsoluteIndex$7(end === undefined ? length : end, length);
+	  var result = Array$7(max$4(fin - k, 0));
+	  for (var n = 0; k < fin; k++, n++) createProperty$4(result, n, O[k]);
+	  result.length = n;
+	  return result;
+	};
 
+	/* eslint-disable es/no-object-getownpropertynames -- safe */
 
+	var classof$9 = classofRaw$1;
+	var toIndexedObject$7 = toIndexedObject$d;
+	var $getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;
+	var arraySlice$c = arraySliceSimple;
 
-	var $floor = $Math$1.floor;
-	var $abs = $Math$1.abs;
+	var windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames
+	  ? Object.getOwnPropertyNames(window) : [];
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.4
+	var getWindowNames = function (it) {
+	  try {
+	    return $getOwnPropertyNames$1(it);
+	  } catch (error) {
+	    return arraySlice$c(windowNames);
+	  }
+	};
 
-	var ToInteger = function ToInteger(value) {
-		var number = ToNumber(value);
-		if (_isNaN(number)) { return 0; }
-		if (number === 0 || !_isFinite(number)) { return number; }
-		return sign$1(number) * $floor($abs(number));
+	// fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window
+	objectGetOwnPropertyNamesExternal.f = function getOwnPropertyNames(it) {
+	  return windowNames && classof$9(it) == 'Window'
+	    ? getWindowNames(it)
+	    : $getOwnPropertyNames$1(toIndexedObject$7(it));
 	};
 
-	var $apply = GetIntrinsic('%Function.prototype.apply%');
-	var $call = GetIntrinsic('%Function.prototype.call%');
-	var $reflectApply = GetIntrinsic('%Reflect.apply%', true) || functionBind.call($call, $apply);
+	var uncurryThis$K = functionUncurryThis;
 
-	var callBind = function callBind() {
-		return $reflectApply(functionBind, $call, arguments);
-	};
+	var arraySlice$b = uncurryThis$K([].slice);
 
-	var apply = function applyBind() {
-		return $reflectApply(functionBind, $apply, arguments);
-	};
-	callBind.apply = apply;
+	var uncurryThis$J = functionUncurryThis;
+	var aCallable$8 = aCallable$a;
+	var NATIVE_BIND$1 = functionBindNative;
 
-	var $indexOf = callBind(GetIntrinsic('String.prototype.indexOf'));
+	var bind$f = uncurryThis$J(uncurryThis$J.bind);
 
-	var callBound = function callBoundIntrinsic(name, allowMissing) {
-		var intrinsic = GetIntrinsic(name, !!allowMissing);
-		if (typeof intrinsic === 'function' && $indexOf(name, '.prototype.')) {
-			return callBind(intrinsic);
-		}
-		return intrinsic;
+	// optional / simple context binding
+	var functionBindContext = function (fn, that) {
+	  aCallable$8(fn);
+	  return that === undefined ? fn : NATIVE_BIND$1 ? bind$f(fn, that) : function (/* ...args */) {
+	    return fn.apply(that, arguments);
+	  };
 	};
 
-	var $test = GetIntrinsic('RegExp.prototype.test');
-
+	var uncurryThis$I = functionUncurryThis;
+	var fails$L = fails$V;
+	var isCallable$c = isCallable$r;
+	var classof$8 = classof$d;
+	var getBuiltIn$6 = getBuiltIn$b;
+	var inspectSource$1 = inspectSource$4;
 
+	var noop$2 = function () { /* empty */ };
+	var empty$1 = [];
+	var construct$1 = getBuiltIn$6('Reflect', 'construct');
+	var constructorRegExp = /^\s*(?:class|function)\b/;
+	var exec$6 = uncurryThis$I(constructorRegExp.exec);
+	var INCORRECT_TO_STRING = !constructorRegExp.exec(noop$2);
 
-	var regexTester = function regexTester(regex) {
-		return callBind($test, regex);
+	var isConstructorModern = function isConstructor(argument) {
+	  if (!isCallable$c(argument)) return false;
+	  try {
+	    construct$1(noop$2, empty$1, argument);
+	    return true;
+	  } catch (error) {
+	    return false;
+	  }
 	};
 
-	var isPrimitive = function isPrimitive(value) {
-		return value === null || (typeof value !== 'function' && typeof value !== 'object');
+	var isConstructorLegacy = function isConstructor(argument) {
+	  if (!isCallable$c(argument)) return false;
+	  switch (classof$8(argument)) {
+	    case 'AsyncFunction':
+	    case 'GeneratorFunction':
+	    case 'AsyncGeneratorFunction': return false;
+	  }
+	  try {
+	    // we can't check .prototype since constructors produced by .bind haven't it
+	    // `Function#toString` throws on some built-it function in some legacy engines
+	    // (for example, `DOMQuad` and similar in FF41-)
+	    return INCORRECT_TO_STRING || !!exec$6(constructorRegExp, inspectSource$1(argument));
+	  } catch (error) {
+	    return true;
+	  }
 	};
 
-	var isPrimitive$1 = function isPrimitive(value) {
-		return value === null || (typeof value !== 'function' && typeof value !== 'object');
+	isConstructorLegacy.sham = true;
+
+	// `IsConstructor` abstract operation
+	// https://tc39.es/ecma262/#sec-isconstructor
+	var isConstructor$4 = !construct$1 || fails$L(function () {
+	  var called;
+	  return isConstructorModern(isConstructorModern.call)
+	    || !isConstructorModern(Object)
+	    || !isConstructorModern(function () { called = true; })
+	    || called;
+	}) ? isConstructorLegacy : isConstructorModern;
+
+	var global$W = global$1o;
+	var isArray$7 = isArray$8;
+	var isConstructor$3 = isConstructor$4;
+	var isObject$m = isObject$s;
+	var wellKnownSymbol$j = wellKnownSymbol$t;
+
+	var SPECIES$6 = wellKnownSymbol$j('species');
+	var Array$6 = global$W.Array;
+
+	// a part of `ArraySpeciesCreate` abstract operation
+	// https://tc39.es/ecma262/#sec-arrayspeciescreate
+	var arraySpeciesConstructor$1 = function (originalArray) {
+	  var C;
+	  if (isArray$7(originalArray)) {
+	    C = originalArray.constructor;
+	    // cross-realm fallback
+	    if (isConstructor$3(C) && (C === Array$6 || isArray$7(C.prototype))) C = undefined;
+	    else if (isObject$m(C)) {
+	      C = C[SPECIES$6];
+	      if (C === null) C = undefined;
+	    }
+	  } return C === undefined ? Array$6 : C;
+	};
+
+	var arraySpeciesConstructor = arraySpeciesConstructor$1;
+
+	// `ArraySpeciesCreate` abstract operation
+	// https://tc39.es/ecma262/#sec-arrayspeciescreate
+	var arraySpeciesCreate$4 = function (originalArray, length) {
+	  return new (arraySpeciesConstructor(originalArray))(length === 0 ? 0 : length);
+	};
+
+	var bind$e = functionBindContext;
+	var uncurryThis$H = functionUncurryThis;
+	var IndexedObject$3 = indexedObject;
+	var toObject$f = toObject$i;
+	var lengthOfArrayLike$f = lengthOfArrayLike$i;
+	var arraySpeciesCreate$3 = arraySpeciesCreate$4;
+
+	var push$9 = uncurryThis$H([].push);
+
+	// `Array.prototype.{ forEach, map, filter, some, every, find, findIndex, filterReject }` methods implementation
+	var createMethod$4 = function (TYPE) {
+	  var IS_MAP = TYPE == 1;
+	  var IS_FILTER = TYPE == 2;
+	  var IS_SOME = TYPE == 3;
+	  var IS_EVERY = TYPE == 4;
+	  var IS_FIND_INDEX = TYPE == 6;
+	  var IS_FILTER_REJECT = TYPE == 7;
+	  var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
+	  return function ($this, callbackfn, that, specificCreate) {
+	    var O = toObject$f($this);
+	    var self = IndexedObject$3(O);
+	    var boundFunction = bind$e(callbackfn, that);
+	    var length = lengthOfArrayLike$f(self);
+	    var index = 0;
+	    var create = specificCreate || arraySpeciesCreate$3;
+	    var target = IS_MAP ? create($this, length) : IS_FILTER || IS_FILTER_REJECT ? create($this, 0) : undefined;
+	    var value, result;
+	    for (;length > index; index++) if (NO_HOLES || index in self) {
+	      value = self[index];
+	      result = boundFunction(value, index, O);
+	      if (TYPE) {
+	        if (IS_MAP) target[index] = result; // map
+	        else if (result) switch (TYPE) {
+	          case 3: return true;              // some
+	          case 5: return value;             // find
+	          case 6: return index;             // findIndex
+	          case 2: push$9(target, value);      // filter
+	        } else switch (TYPE) {
+	          case 4: return false;             // every
+	          case 7: push$9(target, value);      // filterReject
+	        }
+	      }
+	    }
+	    return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;
+	  };
+	};
+
+	var arrayIteration = {
+	  // `Array.prototype.forEach` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.foreach
+	  forEach: createMethod$4(0),
+	  // `Array.prototype.map` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.map
+	  map: createMethod$4(1),
+	  // `Array.prototype.filter` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.filter
+	  filter: createMethod$4(2),
+	  // `Array.prototype.some` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.some
+	  some: createMethod$4(3),
+	  // `Array.prototype.every` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.every
+	  every: createMethod$4(4),
+	  // `Array.prototype.find` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.find
+	  find: createMethod$4(5),
+	  // `Array.prototype.findIndex` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.findIndex
+	  findIndex: createMethod$4(6),
+	  // `Array.prototype.filterReject` method
+	  // https://github.com/tc39/proposal-array-filtering
+	  filterReject: createMethod$4(7)
+	};
+
+	var $$1b = _export;
+	var global$V = global$1o;
+	var getBuiltIn$5 = getBuiltIn$b;
+	var apply$8 = functionApply;
+	var call$j = functionCall;
+	var uncurryThis$G = functionUncurryThis;
+	var DESCRIPTORS$h = descriptors;
+	var NATIVE_SYMBOL$1 = nativeSymbol;
+	var fails$K = fails$V;
+	var hasOwn$b = hasOwnProperty_1;
+	var isArray$6 = isArray$8;
+	var isCallable$b = isCallable$r;
+	var isObject$l = isObject$s;
+	var isPrototypeOf$8 = objectIsPrototypeOf;
+	var isSymbol$3 = isSymbol$6;
+	var anObject$h = anObject$n;
+	var toObject$e = toObject$i;
+	var toIndexedObject$6 = toIndexedObject$d;
+	var toPropertyKey$1 = toPropertyKey$5;
+	var $toString$3 = toString$k;
+	var createPropertyDescriptor$2 = createPropertyDescriptor$7;
+	var nativeObjectCreate = objectCreate;
+	var objectKeys$2 = objectKeys$4;
+	var getOwnPropertyNamesModule$1 = objectGetOwnPropertyNames;
+	var getOwnPropertyNamesExternal = objectGetOwnPropertyNamesExternal;
+	var getOwnPropertySymbolsModule$1 = objectGetOwnPropertySymbols;
+	var getOwnPropertyDescriptorModule$2 = objectGetOwnPropertyDescriptor;
+	var definePropertyModule$2 = objectDefineProperty;
+	var definePropertiesModule = objectDefineProperties;
+	var propertyIsEnumerableModule$1 = objectPropertyIsEnumerable;
+	var arraySlice$a = arraySlice$b;
+	var redefine$b = redefine$h.exports;
+	var shared$1 = shared$5.exports;
+	var sharedKey = sharedKey$4;
+	var hiddenKeys$1 = hiddenKeys$6;
+	var uid$2 = uid$5;
+	var wellKnownSymbol$i = wellKnownSymbol$t;
+	var wrappedWellKnownSymbolModule = wellKnownSymbolWrapped;
+	var defineWellKnownSymbol$2 = defineWellKnownSymbol$4;
+	var setToStringTag$7 = setToStringTag$a;
+	var InternalStateModule$6 = internalState;
+	var $forEach$2 = arrayIteration.forEach;
+
+	var HIDDEN = sharedKey('hidden');
+	var SYMBOL = 'Symbol';
+	var PROTOTYPE$1 = 'prototype';
+	var TO_PRIMITIVE = wellKnownSymbol$i('toPrimitive');
+
+	var setInternalState$6 = InternalStateModule$6.set;
+	var getInternalState$4 = InternalStateModule$6.getterFor(SYMBOL);
+
+	var ObjectPrototype$3 = Object[PROTOTYPE$1];
+	var $Symbol = global$V.Symbol;
+	var SymbolPrototype$1 = $Symbol && $Symbol[PROTOTYPE$1];
+	var TypeError$h = global$V.TypeError;
+	var QObject = global$V.QObject;
+	var $stringify = getBuiltIn$5('JSON', 'stringify');
+	var nativeGetOwnPropertyDescriptor$2 = getOwnPropertyDescriptorModule$2.f;
+	var nativeDefineProperty$1 = definePropertyModule$2.f;
+	var nativeGetOwnPropertyNames = getOwnPropertyNamesExternal.f;
+	var nativePropertyIsEnumerable = propertyIsEnumerableModule$1.f;
+	var push$8 = uncurryThis$G([].push);
+
+	var AllSymbols = shared$1('symbols');
+	var ObjectPrototypeSymbols = shared$1('op-symbols');
+	var StringToSymbolRegistry = shared$1('string-to-symbol-registry');
+	var SymbolToStringRegistry = shared$1('symbol-to-string-registry');
+	var WellKnownSymbolsStore = shared$1('wks');
+
+	// Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173
+	var USE_SETTER = !QObject || !QObject[PROTOTYPE$1] || !QObject[PROTOTYPE$1].findChild;
+
+	// fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687
+	var setSymbolDescriptor = DESCRIPTORS$h && fails$K(function () {
+	  return nativeObjectCreate(nativeDefineProperty$1({}, 'a', {
+	    get: function () { return nativeDefineProperty$1(this, 'a', { value: 7 }).a; }
+	  })).a != 7;
+	}) ? function (O, P, Attributes) {
+	  var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor$2(ObjectPrototype$3, P);
+	  if (ObjectPrototypeDescriptor) delete ObjectPrototype$3[P];
+	  nativeDefineProperty$1(O, P, Attributes);
+	  if (ObjectPrototypeDescriptor && O !== ObjectPrototype$3) {
+	    nativeDefineProperty$1(ObjectPrototype$3, P, ObjectPrototypeDescriptor);
+	  }
+	} : nativeDefineProperty$1;
+
+	var wrap$2 = function (tag, description) {
+	  var symbol = AllSymbols[tag] = nativeObjectCreate(SymbolPrototype$1);
+	  setInternalState$6(symbol, {
+	    type: SYMBOL,
+	    tag: tag,
+	    description: description
+	  });
+	  if (!DESCRIPTORS$h) symbol.description = description;
+	  return symbol;
+	};
+
+	var $defineProperty = function defineProperty(O, P, Attributes) {
+	  if (O === ObjectPrototype$3) $defineProperty(ObjectPrototypeSymbols, P, Attributes);
+	  anObject$h(O);
+	  var key = toPropertyKey$1(P);
+	  anObject$h(Attributes);
+	  if (hasOwn$b(AllSymbols, key)) {
+	    if (!Attributes.enumerable) {
+	      if (!hasOwn$b(O, HIDDEN)) nativeDefineProperty$1(O, HIDDEN, createPropertyDescriptor$2(1, {}));
+	      O[HIDDEN][key] = true;
+	    } else {
+	      if (hasOwn$b(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;
+	      Attributes = nativeObjectCreate(Attributes, { enumerable: createPropertyDescriptor$2(0, false) });
+	    } return setSymbolDescriptor(O, key, Attributes);
+	  } return nativeDefineProperty$1(O, key, Attributes);
+	};
+
+	var $defineProperties = function defineProperties(O, Properties) {
+	  anObject$h(O);
+	  var properties = toIndexedObject$6(Properties);
+	  var keys = objectKeys$2(properties).concat($getOwnPropertySymbols(properties));
+	  $forEach$2(keys, function (key) {
+	    if (!DESCRIPTORS$h || call$j($propertyIsEnumerable$1, properties, key)) $defineProperty(O, key, properties[key]);
+	  });
+	  return O;
 	};
 
-	var fnToStr = Function.prototype.toString;
-	var reflectApply = typeof Reflect === 'object' && Reflect !== null && Reflect.apply;
-	var badArrayLike;
-	var isCallableMarker;
-	if (typeof reflectApply === 'function' && typeof Object.defineProperty === 'function') {
-		try {
-			badArrayLike = Object.defineProperty({}, 'length', {
-				get: function () {
-					throw isCallableMarker;
-				}
-			});
-			isCallableMarker = {};
-		} catch (_) {
-			reflectApply = null;
-		}
-	} else {
-		reflectApply = null;
-	}
-
-	var constructorRegex = /^\s*class\b/;
-	var isES6ClassFn = function isES6ClassFunction(value) {
-		try {
-			var fnStr = fnToStr.call(value);
-			return constructorRegex.test(fnStr);
-		} catch (e) {
-			return false; // not a function
-		}
+	var $create = function create(O, Properties) {
+	  return Properties === undefined ? nativeObjectCreate(O) : $defineProperties(nativeObjectCreate(O), Properties);
 	};
 
-	var tryFunctionObject = function tryFunctionToStr(value) {
-		try {
-			if (isES6ClassFn(value)) { return false; }
-			fnToStr.call(value);
-			return true;
-		} catch (e) {
-			return false;
-		}
+	var $propertyIsEnumerable$1 = function propertyIsEnumerable(V) {
+	  var P = toPropertyKey$1(V);
+	  var enumerable = call$j(nativePropertyIsEnumerable, this, P);
+	  if (this === ObjectPrototype$3 && hasOwn$b(AllSymbols, P) && !hasOwn$b(ObjectPrototypeSymbols, P)) return false;
+	  return enumerable || !hasOwn$b(this, P) || !hasOwn$b(AllSymbols, P) || hasOwn$b(this, HIDDEN) && this[HIDDEN][P]
+	    ? enumerable : true;
 	};
-	var toStr$4 = Object.prototype.toString;
-	var fnClass = '[object Function]';
-	var genClass = '[object GeneratorFunction]';
-	var hasToStringTag = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
-
-	var isCallable = reflectApply
-		? function isCallable(value) {
-			if (!value) { return false; }
-			if (typeof value !== 'function' && typeof value !== 'object') { return false; }
-			if (typeof value === 'function' && !value.prototype) { return true; }
-			try {
-				reflectApply(value, null, badArrayLike);
-			} catch (e) {
-				if (e !== isCallableMarker) { return false; }
-			}
-			return !isES6ClassFn(value);
-		}
-		: function isCallable(value) {
-			if (!value) { return false; }
-			if (typeof value !== 'function' && typeof value !== 'object') { return false; }
-			if (typeof value === 'function' && !value.prototype) { return true; }
-			if (hasToStringTag) { return tryFunctionObject(value); }
-			if (isES6ClassFn(value)) { return false; }
-			var strClass = toStr$4.call(value);
-			return strClass === fnClass || strClass === genClass;
-		};
-
-	var getDay = Date.prototype.getDay;
-	var tryDateObject = function tryDateGetDayCall(value) {
-		try {
-			getDay.call(value);
-			return true;
-		} catch (e) {
-			return false;
-		}
+
+	var $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(O, P) {
+	  var it = toIndexedObject$6(O);
+	  var key = toPropertyKey$1(P);
+	  if (it === ObjectPrototype$3 && hasOwn$b(AllSymbols, key) && !hasOwn$b(ObjectPrototypeSymbols, key)) return;
+	  var descriptor = nativeGetOwnPropertyDescriptor$2(it, key);
+	  if (descriptor && hasOwn$b(AllSymbols, key) && !(hasOwn$b(it, HIDDEN) && it[HIDDEN][key])) {
+	    descriptor.enumerable = true;
+	  }
+	  return descriptor;
 	};
 
-	var toStr$5 = Object.prototype.toString;
-	var dateClass = '[object Date]';
-	var hasToStringTag$1 = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
+	var $getOwnPropertyNames = function getOwnPropertyNames(O) {
+	  var names = nativeGetOwnPropertyNames(toIndexedObject$6(O));
+	  var result = [];
+	  $forEach$2(names, function (key) {
+	    if (!hasOwn$b(AllSymbols, key) && !hasOwn$b(hiddenKeys$1, key)) push$8(result, key);
+	  });
+	  return result;
+	};
 
-	var isDateObject = function isDateObject(value) {
-		if (typeof value !== 'object' || value === null) {
-			return false;
-		}
-		return hasToStringTag$1 ? tryDateObject(value) : toStr$5.call(value) === dateClass;
+	var $getOwnPropertySymbols = function getOwnPropertySymbols(O) {
+	  var IS_OBJECT_PROTOTYPE = O === ObjectPrototype$3;
+	  var names = nativeGetOwnPropertyNames(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject$6(O));
+	  var result = [];
+	  $forEach$2(names, function (key) {
+	    if (hasOwn$b(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || hasOwn$b(ObjectPrototype$3, key))) {
+	      push$8(result, AllSymbols[key]);
+	    }
+	  });
+	  return result;
 	};
 
-	var isSymbol$2 = createCommonjsModule(function (module) {
-
-	var toStr = Object.prototype.toString;
-	var hasSymbols = hasSymbols$1();
-
-	if (hasSymbols) {
-		var symToStr = Symbol.prototype.toString;
-		var symStringRegex = /^Symbol\(.*\)$/;
-		var isSymbolObject = function isRealSymbolObject(value) {
-			if (typeof value.valueOf() !== 'symbol') {
-				return false;
-			}
-			return symStringRegex.test(symToStr.call(value));
-		};
-
-		module.exports = function isSymbol(value) {
-			if (typeof value === 'symbol') {
-				return true;
-			}
-			if (toStr.call(value) !== '[object Symbol]') {
-				return false;
-			}
-			try {
-				return isSymbolObject(value);
-			} catch (e) {
-				return false;
-			}
-		};
-	} else {
+	// `Symbol` constructor
+	// https://tc39.es/ecma262/#sec-symbol-constructor
+	if (!NATIVE_SYMBOL$1) {
+	  $Symbol = function Symbol() {
+	    if (isPrototypeOf$8(SymbolPrototype$1, this)) throw TypeError$h('Symbol is not a constructor');
+	    var description = !arguments.length || arguments[0] === undefined ? undefined : $toString$3(arguments[0]);
+	    var tag = uid$2(description);
+	    var setter = function (value) {
+	      if (this === ObjectPrototype$3) call$j(setter, ObjectPrototypeSymbols, value);
+	      if (hasOwn$b(this, HIDDEN) && hasOwn$b(this[HIDDEN], tag)) this[HIDDEN][tag] = false;
+	      setSymbolDescriptor(this, tag, createPropertyDescriptor$2(1, value));
+	    };
+	    if (DESCRIPTORS$h && USE_SETTER) setSymbolDescriptor(ObjectPrototype$3, tag, { configurable: true, set: setter });
+	    return wrap$2(tag, description);
+	  };
 
-		module.exports = function isSymbol(value) {
-			// this environment does not support Symbols.
-			return false ;
-		};
-	}
-	});
+	  SymbolPrototype$1 = $Symbol[PROTOTYPE$1];
 
-	var hasSymbols$3 = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol';
+	  redefine$b(SymbolPrototype$1, 'toString', function toString() {
+	    return getInternalState$4(this).tag;
+	  });
 
+	  redefine$b($Symbol, 'withoutSetter', function (description) {
+	    return wrap$2(uid$2(description), description);
+	  });
 
+	  propertyIsEnumerableModule$1.f = $propertyIsEnumerable$1;
+	  definePropertyModule$2.f = $defineProperty;
+	  definePropertiesModule.f = $defineProperties;
+	  getOwnPropertyDescriptorModule$2.f = $getOwnPropertyDescriptor;
+	  getOwnPropertyNamesModule$1.f = getOwnPropertyNamesExternal.f = $getOwnPropertyNames;
+	  getOwnPropertySymbolsModule$1.f = $getOwnPropertySymbols;
 
+	  wrappedWellKnownSymbolModule.f = function (name) {
+	    return wrap$2(wellKnownSymbol$i(name), name);
+	  };
 
+	  if (DESCRIPTORS$h) {
+	    // https://github.com/tc39/proposal-Symbol-description
+	    nativeDefineProperty$1(SymbolPrototype$1, 'description', {
+	      configurable: true,
+	      get: function description() {
+	        return getInternalState$4(this).description;
+	      }
+	    });
+	    {
+	      redefine$b(ObjectPrototype$3, 'propertyIsEnumerable', $propertyIsEnumerable$1, { unsafe: true });
+	    }
+	  }
+	}
 
+	$$1b({ global: true, wrap: true, forced: !NATIVE_SYMBOL$1, sham: !NATIVE_SYMBOL$1 }, {
+	  Symbol: $Symbol
+	});
 
-	var ordinaryToPrimitive = function OrdinaryToPrimitive(O, hint) {
-		if (typeof O === 'undefined' || O === null) {
-			throw new TypeError('Cannot call method on ' + O);
-		}
-		if (typeof hint !== 'string' || (hint !== 'number' && hint !== 'string')) {
-			throw new TypeError('hint must be "string" or "number"');
-		}
-		var methodNames = hint === 'string' ? ['toString', 'valueOf'] : ['valueOf', 'toString'];
-		var method, result, i;
-		for (i = 0; i < methodNames.length; ++i) {
-			method = O[methodNames[i]];
-			if (isCallable(method)) {
-				result = method.call(O);
-				if (isPrimitive$1(result)) {
-					return result;
-				}
-			}
-		}
-		throw new TypeError('No default value');
-	};
+	$forEach$2(objectKeys$2(WellKnownSymbolsStore), function (name) {
+	  defineWellKnownSymbol$2(name);
+	});
 
-	var GetMethod = function GetMethod(O, P) {
-		var func = O[P];
-		if (func !== null && typeof func !== 'undefined') {
-			if (!isCallable(func)) {
-				throw new TypeError(func + ' returned for property ' + P + ' of object ' + O + ' is not a function');
-			}
-			return func;
-		}
-		return void 0;
-	};
+	$$1b({ target: SYMBOL, stat: true, forced: !NATIVE_SYMBOL$1 }, {
+	  // `Symbol.for` method
+	  // https://tc39.es/ecma262/#sec-symbol.for
+	  'for': function (key) {
+	    var string = $toString$3(key);
+	    if (hasOwn$b(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string];
+	    var symbol = $Symbol(string);
+	    StringToSymbolRegistry[string] = symbol;
+	    SymbolToStringRegistry[symbol] = string;
+	    return symbol;
+	  },
+	  // `Symbol.keyFor` method
+	  // https://tc39.es/ecma262/#sec-symbol.keyfor
+	  keyFor: function keyFor(sym) {
+	    if (!isSymbol$3(sym)) throw TypeError$h(sym + ' is not a symbol');
+	    if (hasOwn$b(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];
+	  },
+	  useSetter: function () { USE_SETTER = true; },
+	  useSimple: function () { USE_SETTER = false; }
+	});
 
-	// http://www.ecma-international.org/ecma-262/6.0/#sec-toprimitive
-	var es2015 = function ToPrimitive(input) {
-		if (isPrimitive$1(input)) {
-			return input;
-		}
-		var hint = 'default';
-		if (arguments.length > 1) {
-			if (arguments[1] === String) {
-				hint = 'string';
-			} else if (arguments[1] === Number) {
-				hint = 'number';
-			}
-		}
-
-		var exoticToPrim;
-		if (hasSymbols$3) {
-			if (Symbol.toPrimitive) {
-				exoticToPrim = GetMethod(input, Symbol.toPrimitive);
-			} else if (isSymbol$2(input)) {
-				exoticToPrim = Symbol.prototype.valueOf;
-			}
-		}
-		if (typeof exoticToPrim !== 'undefined') {
-			var result = exoticToPrim.call(input, hint);
-			if (isPrimitive$1(result)) {
-				return result;
-			}
-			throw new TypeError('unable to convert exotic object to primitive');
-		}
-		if (hint === 'default' && (isDateObject(input) || isSymbol$2(input))) {
-			hint = 'string';
-		}
-		return ordinaryToPrimitive(input, hint === 'default' ? 'number' : hint);
-	};
+	$$1b({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL$1, sham: !DESCRIPTORS$h }, {
+	  // `Object.create` method
+	  // https://tc39.es/ecma262/#sec-object.create
+	  create: $create,
+	  // `Object.defineProperty` method
+	  // https://tc39.es/ecma262/#sec-object.defineproperty
+	  defineProperty: $defineProperty,
+	  // `Object.defineProperties` method
+	  // https://tc39.es/ecma262/#sec-object.defineproperties
+	  defineProperties: $defineProperties,
+	  // `Object.getOwnPropertyDescriptor` method
+	  // https://tc39.es/ecma262/#sec-object.getownpropertydescriptors
+	  getOwnPropertyDescriptor: $getOwnPropertyDescriptor
+	});
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-toprimitive
+	$$1b({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL$1 }, {
+	  // `Object.getOwnPropertyNames` method
+	  // https://tc39.es/ecma262/#sec-object.getownpropertynames
+	  getOwnPropertyNames: $getOwnPropertyNames,
+	  // `Object.getOwnPropertySymbols` method
+	  // https://tc39.es/ecma262/#sec-object.getownpropertysymbols
+	  getOwnPropertySymbols: $getOwnPropertySymbols
+	});
 
-	var ToPrimitive = function ToPrimitive(input) {
-		if (arguments.length > 1) {
-			return es2015(input, arguments[1]);
-		}
-		return es2015(input);
-	};
+	// Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives
+	// https://bugs.chromium.org/p/v8/issues/detail?id=3443
+	$$1b({ target: 'Object', stat: true, forced: fails$K(function () { getOwnPropertySymbolsModule$1.f(1); }) }, {
+	  getOwnPropertySymbols: function getOwnPropertySymbols(it) {
+	    return getOwnPropertySymbolsModule$1.f(toObject$e(it));
+	  }
+	});
 
-	var $TypeError$2 = GetIntrinsic('%TypeError%');
-	var $Number$1 = GetIntrinsic('%Number%');
-	var $RegExp = GetIntrinsic('%RegExp%');
-	var $parseInteger = GetIntrinsic('%parseInt%');
+	// `JSON.stringify` method behavior with symbols
+	// https://tc39.es/ecma262/#sec-json.stringify
+	if ($stringify) {
+	  var FORCED_JSON_STRINGIFY = !NATIVE_SYMBOL$1 || fails$K(function () {
+	    var symbol = $Symbol();
+	    // MS Edge converts symbol values to JSON as {}
+	    return $stringify([symbol]) != '[null]'
+	      // WebKit converts symbol values to JSON as null
+	      || $stringify({ a: symbol }) != '{}'
+	      // V8 throws on boxed symbols
+	      || $stringify(Object(symbol)) != '{}';
+	  });
 
+	  $$1b({ target: 'JSON', stat: true, forced: FORCED_JSON_STRINGIFY }, {
+	    // eslint-disable-next-line no-unused-vars -- required for `.length`
+	    stringify: function stringify(it, replacer, space) {
+	      var args = arraySlice$a(arguments);
+	      var $replacer = replacer;
+	      if (!isObject$l(replacer) && it === undefined || isSymbol$3(it)) return; // IE8 returns string on undefined
+	      if (!isArray$6(replacer)) replacer = function (key, value) {
+	        if (isCallable$b($replacer)) value = call$j($replacer, this, key, value);
+	        if (!isSymbol$3(value)) return value;
+	      };
+	      args[1] = replacer;
+	      return apply$8($stringify, null, args);
+	    }
+	  });
+	}
 
+	// `Symbol.prototype[@@toPrimitive]` method
+	// https://tc39.es/ecma262/#sec-symbol.prototype-@@toprimitive
+	if (!SymbolPrototype$1[TO_PRIMITIVE]) {
+	  var valueOf = SymbolPrototype$1.valueOf;
+	  // eslint-disable-next-line no-unused-vars -- required for .length
+	  redefine$b(SymbolPrototype$1, TO_PRIMITIVE, function (hint) {
+	    // TODO: improve hint logic
+	    return call$j(valueOf, this);
+	  });
+	}
+	// `Symbol.prototype[@@toStringTag]` property
+	// https://tc39.es/ecma262/#sec-symbol.prototype-@@tostringtag
+	setToStringTag$7($Symbol, SYMBOL);
+
+	hiddenKeys$1[HIDDEN] = true;
+
+	var $$1a = _export;
+	var DESCRIPTORS$g = descriptors;
+	var global$U = global$1o;
+	var uncurryThis$F = functionUncurryThis;
+	var hasOwn$a = hasOwnProperty_1;
+	var isCallable$a = isCallable$r;
+	var isPrototypeOf$7 = objectIsPrototypeOf;
+	var toString$h = toString$k;
+	var defineProperty$9 = objectDefineProperty.f;
+	var copyConstructorProperties = copyConstructorProperties$2;
+
+	var NativeSymbol = global$U.Symbol;
+	var SymbolPrototype = NativeSymbol && NativeSymbol.prototype;
+
+	if (DESCRIPTORS$g && isCallable$a(NativeSymbol) && (!('description' in SymbolPrototype) ||
+	  // Safari 12 bug
+	  NativeSymbol().description !== undefined
+	)) {
+	  var EmptyStringDescriptionStore = {};
+	  // wrap Symbol constructor for correct work with undefined description
+	  var SymbolWrapper = function Symbol() {
+	    var description = arguments.length < 1 || arguments[0] === undefined ? undefined : toString$h(arguments[0]);
+	    var result = isPrototypeOf$7(SymbolPrototype, this)
+	      ? new NativeSymbol(description)
+	      // in Edge 13, String(Symbol(undefined)) === 'Symbol(undefined)'
+	      : description === undefined ? NativeSymbol() : NativeSymbol(description);
+	    if (description === '') EmptyStringDescriptionStore[result] = true;
+	    return result;
+	  };
 
+	  copyConstructorProperties(SymbolWrapper, NativeSymbol);
+	  SymbolWrapper.prototype = SymbolPrototype;
+	  SymbolPrototype.constructor = SymbolWrapper;
 
+	  var NATIVE_SYMBOL = String(NativeSymbol('test')) == 'Symbol(test)';
+	  var symbolToString$1 = uncurryThis$F(SymbolPrototype.toString);
+	  var symbolValueOf = uncurryThis$F(SymbolPrototype.valueOf);
+	  var regexp = /^Symbol\((.*)\)[^)]+$/;
+	  var replace$8 = uncurryThis$F(''.replace);
+	  var stringSlice$a = uncurryThis$F(''.slice);
 
-	var $strSlice = callBound('String.prototype.slice');
-	var isBinary = regexTester(/^0b[01]+$/i);
-	var isOctal = regexTester(/^0o[0-7]+$/i);
-	var isInvalidHexLiteral = regexTester(/^[-+]0x[0-9a-f]+$/i);
-	var nonWS = ['\u0085', '\u200b', '\ufffe'].join('');
-	var nonWSregex = new $RegExp('[' + nonWS + ']', 'g');
-	var hasNonWS = regexTester(nonWSregex);
+	  defineProperty$9(SymbolPrototype, 'description', {
+	    configurable: true,
+	    get: function description() {
+	      var symbol = symbolValueOf(this);
+	      var string = symbolToString$1(symbol);
+	      if (hasOwn$a(EmptyStringDescriptionStore, symbol)) return '';
+	      var desc = NATIVE_SYMBOL ? stringSlice$a(string, 7, -1) : replace$8(string, regexp, '$1');
+	      return desc === '' ? undefined : desc;
+	    }
+	  });
 
-	// whitespace from: https://es5.github.io/#x15.5.4.20
-	// implementation from https://github.com/es-shims/es5-shim/blob/v3.4.0/es5-shim.js#L1304-L1324
-	var ws = [
-		'\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003',
-		'\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028',
-		'\u2029\uFEFF'
-	].join('');
-	var trimRegex = new RegExp('(^[' + ws + ']+)|([' + ws + ']+$)', 'g');
-	var $replace$1 = callBound('String.prototype.replace');
-	var $trim = function (value) {
-		return $replace$1(value, trimRegex, '');
-	};
+	  $$1a({ global: true, forced: true }, {
+	    Symbol: SymbolWrapper
+	  });
+	}
 
+	// eslint-disable-next-line es/no-typed-arrays -- safe
+	var arrayBufferNative = typeof ArrayBuffer != 'undefined' && typeof DataView != 'undefined';
 
+	var redefine$a = redefine$h.exports;
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-tonumber
-
-	var ToNumber$1 = function ToNumber(argument) {
-		var value = isPrimitive(argument) ? argument : ToPrimitive(argument, $Number$1);
-		if (typeof value === 'symbol') {
-			throw new $TypeError$2('Cannot convert a Symbol value to a number');
-		}
-		if (typeof value === 'string') {
-			if (isBinary(value)) {
-				return ToNumber($parseInteger($strSlice(value, 2), 2));
-			} else if (isOctal(value)) {
-				return ToNumber($parseInteger($strSlice(value, 2), 8));
-			} else if (hasNonWS(value) || isInvalidHexLiteral(value)) {
-				return NaN;
-			} else {
-				var trimmed = $trim(value);
-				if (trimmed !== value) {
-					return ToNumber(trimmed);
-				}
-			}
-		}
-		return $Number$1(value);
+	var redefineAll$4 = function (target, src, options) {
+	  for (var key in src) redefine$a(target, key, src[key], options);
+	  return target;
 	};
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-tointeger
+	var global$T = global$1o;
+	var isPrototypeOf$6 = objectIsPrototypeOf;
 
-	var ToInteger$1 = function ToInteger$1(value) {
-		var number = ToNumber$1(value);
-		return ToInteger(number);
-	};
+	var TypeError$g = global$T.TypeError;
 
-	var ToLength = function ToLength(argument) {
-		var len = ToInteger$1(argument);
-		if (len <= 0) { return 0; } // includes converting -0 to +0
-		if (len > maxSafeInteger) { return maxSafeInteger; }
-		return len;
+	var anInstance$7 = function (it, Prototype) {
+	  if (isPrototypeOf$6(Prototype, it)) return it;
+	  throw TypeError$g('Incorrect invocation');
 	};
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.11
-
-	var IsCallable = isCallable;
-
-	var implementation$3 = function find(predicate) {
-		var list = ToObject(this);
-		var length = ToLength(list.length);
-		if (!IsCallable(predicate)) {
-			throw new TypeError('Array#find: predicate must be a function');
-		}
-		if (length === 0) {
-			return void 0;
-		}
-		var thisArg;
-		if (arguments.length > 0) {
-			thisArg = arguments[1];
-		}
-
-		for (var i = 0, value; i < length; i++) {
-			value = list[i];
-			// inlined for performance: if (Call(predicate, thisArg, [value, i, list])) {
-			if (predicate.apply(thisArg, [value, i, list])) {
-				return value;
-			}
-		}
-		return void 0;
-	};
+	var global$S = global$1o;
+	var toIntegerOrInfinity$7 = toIntegerOrInfinity$b;
+	var toLength$a = toLength$c;
 
-	var polyfill$4 = function getPolyfill() {
-		// Detect if an implementation exists
-		// Detect early implementations which skipped holes in sparse arrays
-		// eslint-disable-next-line no-sparse-arrays
-		var implemented = Array.prototype.find && [, 1].find(function () {
-			return true;
-		}) !== 1;
+	var RangeError$b = global$S.RangeError;
 
-		// eslint-disable-next-line global-require
-		return implemented ? Array.prototype.find : implementation$3;
+	// `ToIndex` abstract operation
+	// https://tc39.es/ecma262/#sec-toindex
+	var toIndex$2 = function (it) {
+	  if (it === undefined) return 0;
+	  var number = toIntegerOrInfinity$7(it);
+	  var length = toLength$a(number);
+	  if (number !== length) throw RangeError$b('Wrong length or index');
+	  return length;
 	};
 
-	var shim$8 = function shimArrayPrototypeFind() {
-		var polyfill = polyfill$4();
+	// IEEE754 conversions based on https://github.com/feross/ieee754
+	var global$R = global$1o;
 
-		defineProperties_1(Array.prototype, { find: polyfill }, {
-			find: function () {
-				return Array.prototype.find !== polyfill;
-			}
-		});
+	var Array$5 = global$R.Array;
+	var abs$4 = Math.abs;
+	var pow$2 = Math.pow;
+	var floor$7 = Math.floor;
+	var log$2 = Math.log;
+	var LN2 = Math.LN2;
 
-		return polyfill;
+	var pack = function (number, mantissaLength, bytes) {
+	  var buffer = Array$5(bytes);
+	  var exponentLength = bytes * 8 - mantissaLength - 1;
+	  var eMax = (1 << exponentLength) - 1;
+	  var eBias = eMax >> 1;
+	  var rt = mantissaLength === 23 ? pow$2(2, -24) - pow$2(2, -77) : 0;
+	  var sign = number < 0 || number === 0 && 1 / number < 0 ? 1 : 0;
+	  var index = 0;
+	  var exponent, mantissa, c;
+	  number = abs$4(number);
+	  // eslint-disable-next-line no-self-compare -- NaN check
+	  if (number != number || number === Infinity) {
+	    // eslint-disable-next-line no-self-compare -- NaN check
+	    mantissa = number != number ? 1 : 0;
+	    exponent = eMax;
+	  } else {
+	    exponent = floor$7(log$2(number) / LN2);
+	    c = pow$2(2, -exponent);
+	    if (number * c < 1) {
+	      exponent--;
+	      c *= 2;
+	    }
+	    if (exponent + eBias >= 1) {
+	      number += rt / c;
+	    } else {
+	      number += rt * pow$2(2, 1 - eBias);
+	    }
+	    if (number * c >= 2) {
+	      exponent++;
+	      c /= 2;
+	    }
+	    if (exponent + eBias >= eMax) {
+	      mantissa = 0;
+	      exponent = eMax;
+	    } else if (exponent + eBias >= 1) {
+	      mantissa = (number * c - 1) * pow$2(2, mantissaLength);
+	      exponent = exponent + eBias;
+	    } else {
+	      mantissa = number * pow$2(2, eBias - 1) * pow$2(2, mantissaLength);
+	      exponent = 0;
+	    }
+	  }
+	  while (mantissaLength >= 8) {
+	    buffer[index++] = mantissa & 255;
+	    mantissa /= 256;
+	    mantissaLength -= 8;
+	  }
+	  exponent = exponent << mantissaLength | mantissa;
+	  exponentLength += mantissaLength;
+	  while (exponentLength > 0) {
+	    buffer[index++] = exponent & 255;
+	    exponent /= 256;
+	    exponentLength -= 8;
+	  }
+	  buffer[--index] |= sign * 128;
+	  return buffer;
 	};
 
-	var slice$2 = Array.prototype.slice;
+	var unpack = function (buffer, mantissaLength) {
+	  var bytes = buffer.length;
+	  var exponentLength = bytes * 8 - mantissaLength - 1;
+	  var eMax = (1 << exponentLength) - 1;
+	  var eBias = eMax >> 1;
+	  var nBits = exponentLength - 7;
+	  var index = bytes - 1;
+	  var sign = buffer[index--];
+	  var exponent = sign & 127;
+	  var mantissa;
+	  sign >>= 7;
+	  while (nBits > 0) {
+	    exponent = exponent * 256 + buffer[index--];
+	    nBits -= 8;
+	  }
+	  mantissa = exponent & (1 << -nBits) - 1;
+	  exponent >>= -nBits;
+	  nBits += mantissaLength;
+	  while (nBits > 0) {
+	    mantissa = mantissa * 256 + buffer[index--];
+	    nBits -= 8;
+	  }
+	  if (exponent === 0) {
+	    exponent = 1 - eBias;
+	  } else if (exponent === eMax) {
+	    return mantissa ? NaN : sign ? -Infinity : Infinity;
+	  } else {
+	    mantissa = mantissa + pow$2(2, mantissaLength);
+	    exponent = exponent - eBias;
+	  } return (sign ? -1 : 1) * mantissa * pow$2(2, exponent - mantissaLength);
+	};
+
+	var ieee754$2 = {
+	  pack: pack,
+	  unpack: unpack
+	};
+
+	var toObject$d = toObject$i;
+	var toAbsoluteIndex$6 = toAbsoluteIndex$9;
+	var lengthOfArrayLike$e = lengthOfArrayLike$i;
+
+	// `Array.prototype.fill` method implementation
+	// https://tc39.es/ecma262/#sec-array.prototype.fill
+	var arrayFill$1 = function fill(value /* , start = 0, end = @length */) {
+	  var O = toObject$d(this);
+	  var length = lengthOfArrayLike$e(O);
+	  var argumentsLength = arguments.length;
+	  var index = toAbsoluteIndex$6(argumentsLength > 1 ? arguments[1] : undefined, length);
+	  var end = argumentsLength > 2 ? arguments[2] : undefined;
+	  var endPos = end === undefined ? length : toAbsoluteIndex$6(end, length);
+	  while (endPos > index) O[index++] = value;
+	  return O;
+	};
+
+	var global$Q = global$1o;
+	var uncurryThis$E = functionUncurryThis;
+	var DESCRIPTORS$f = descriptors;
+	var NATIVE_ARRAY_BUFFER$2 = arrayBufferNative;
+	var FunctionName = functionName;
+	var createNonEnumerableProperty$5 = createNonEnumerableProperty$b;
+	var redefineAll$3 = redefineAll$4;
+	var fails$J = fails$V;
+	var anInstance$6 = anInstance$7;
+	var toIntegerOrInfinity$6 = toIntegerOrInfinity$b;
+	var toLength$9 = toLength$c;
+	var toIndex$1 = toIndex$2;
+	var IEEE754 = ieee754$2;
+	var getPrototypeOf$2 = objectGetPrototypeOf;
+	var setPrototypeOf$5 = objectSetPrototypeOf;
+	var getOwnPropertyNames$4 = objectGetOwnPropertyNames.f;
+	var defineProperty$8 = objectDefineProperty.f;
+	var arrayFill = arrayFill$1;
+	var arraySlice$9 = arraySliceSimple;
+	var setToStringTag$6 = setToStringTag$a;
+	var InternalStateModule$5 = internalState;
+
+	var PROPER_FUNCTION_NAME$2 = FunctionName.PROPER;
+	var CONFIGURABLE_FUNCTION_NAME = FunctionName.CONFIGURABLE;
+	var getInternalState$3 = InternalStateModule$5.get;
+	var setInternalState$5 = InternalStateModule$5.set;
+	var ARRAY_BUFFER$1 = 'ArrayBuffer';
+	var DATA_VIEW = 'DataView';
+	var PROTOTYPE = 'prototype';
+	var WRONG_LENGTH$1 = 'Wrong length';
+	var WRONG_INDEX = 'Wrong index';
+	var NativeArrayBuffer$1 = global$Q[ARRAY_BUFFER$1];
+	var $ArrayBuffer = NativeArrayBuffer$1;
+	var ArrayBufferPrototype$1 = $ArrayBuffer && $ArrayBuffer[PROTOTYPE];
+	var $DataView = global$Q[DATA_VIEW];
+	var DataViewPrototype$1 = $DataView && $DataView[PROTOTYPE];
+	var ObjectPrototype$2 = Object.prototype;
+	var Array$4 = global$Q.Array;
+	var RangeError$a = global$Q.RangeError;
+	var fill$1 = uncurryThis$E(arrayFill);
+	var reverse = uncurryThis$E([].reverse);
+
+	var packIEEE754 = IEEE754.pack;
+	var unpackIEEE754 = IEEE754.unpack;
+
+	var packInt8 = function (number) {
+	  return [number & 0xFF];
+	};
+
+	var packInt16 = function (number) {
+	  return [number & 0xFF, number >> 8 & 0xFF];
+	};
+
+	var packInt32 = function (number) {
+	  return [number & 0xFF, number >> 8 & 0xFF, number >> 16 & 0xFF, number >> 24 & 0xFF];
+	};
+
+	var unpackInt32 = function (buffer) {
+	  return buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];
+	};
+
+	var packFloat32 = function (number) {
+	  return packIEEE754(number, 23, 4);
+	};
+
+	var packFloat64 = function (number) {
+	  return packIEEE754(number, 52, 8);
+	};
+
+	var addGetter$1 = function (Constructor, key) {
+	  defineProperty$8(Constructor[PROTOTYPE], key, { get: function () { return getInternalState$3(this)[key]; } });
+	};
+
+	var get$4 = function (view, count, index, isLittleEndian) {
+	  var intIndex = toIndex$1(index);
+	  var store = getInternalState$3(view);
+	  if (intIndex + count > store.byteLength) throw RangeError$a(WRONG_INDEX);
+	  var bytes = getInternalState$3(store.buffer).bytes;
+	  var start = intIndex + store.byteOffset;
+	  var pack = arraySlice$9(bytes, start, start + count);
+	  return isLittleEndian ? pack : reverse(pack);
+	};
+
+	var set$3 = function (view, count, index, conversion, value, isLittleEndian) {
+	  var intIndex = toIndex$1(index);
+	  var store = getInternalState$3(view);
+	  if (intIndex + count > store.byteLength) throw RangeError$a(WRONG_INDEX);
+	  var bytes = getInternalState$3(store.buffer).bytes;
+	  var start = intIndex + store.byteOffset;
+	  var pack = conversion(+value);
+	  for (var i = 0; i < count; i++) bytes[start + i] = pack[isLittleEndian ? i : count - i - 1];
+	};
+
+	if (!NATIVE_ARRAY_BUFFER$2) {
+	  $ArrayBuffer = function ArrayBuffer(length) {
+	    anInstance$6(this, ArrayBufferPrototype$1);
+	    var byteLength = toIndex$1(length);
+	    setInternalState$5(this, {
+	      bytes: fill$1(Array$4(byteLength), 0),
+	      byteLength: byteLength
+	    });
+	    if (!DESCRIPTORS$f) this.byteLength = byteLength;
+	  };
+
+	  ArrayBufferPrototype$1 = $ArrayBuffer[PROTOTYPE];
+
+	  $DataView = function DataView(buffer, byteOffset, byteLength) {
+	    anInstance$6(this, DataViewPrototype$1);
+	    anInstance$6(buffer, ArrayBufferPrototype$1);
+	    var bufferLength = getInternalState$3(buffer).byteLength;
+	    var offset = toIntegerOrInfinity$6(byteOffset);
+	    if (offset < 0 || offset > bufferLength) throw RangeError$a('Wrong offset');
+	    byteLength = byteLength === undefined ? bufferLength - offset : toLength$9(byteLength);
+	    if (offset + byteLength > bufferLength) throw RangeError$a(WRONG_LENGTH$1);
+	    setInternalState$5(this, {
+	      buffer: buffer,
+	      byteLength: byteLength,
+	      byteOffset: offset
+	    });
+	    if (!DESCRIPTORS$f) {
+	      this.buffer = buffer;
+	      this.byteLength = byteLength;
+	      this.byteOffset = offset;
+	    }
+	  };
+
+	  DataViewPrototype$1 = $DataView[PROTOTYPE];
 
-	var polyfill$5 = polyfill$4();
+	  if (DESCRIPTORS$f) {
+	    addGetter$1($ArrayBuffer, 'byteLength');
+	    addGetter$1($DataView, 'buffer');
+	    addGetter$1($DataView, 'byteLength');
+	    addGetter$1($DataView, 'byteOffset');
+	  }
 
-	var boundFindShim = function find(array, predicate) { // eslint-disable-line no-unused-vars
-		RequireObjectCoercible(array);
-		var args = slice$2.call(arguments, 1);
-		return polyfill$5.apply(array, args);
-	};
+	  redefineAll$3(DataViewPrototype$1, {
+	    getInt8: function getInt8(byteOffset) {
+	      return get$4(this, 1, byteOffset)[0] << 24 >> 24;
+	    },
+	    getUint8: function getUint8(byteOffset) {
+	      return get$4(this, 1, byteOffset)[0];
+	    },
+	    getInt16: function getInt16(byteOffset /* , littleEndian */) {
+	      var bytes = get$4(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
+	      return (bytes[1] << 8 | bytes[0]) << 16 >> 16;
+	    },
+	    getUint16: function getUint16(byteOffset /* , littleEndian */) {
+	      var bytes = get$4(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
+	      return bytes[1] << 8 | bytes[0];
+	    },
+	    getInt32: function getInt32(byteOffset /* , littleEndian */) {
+	      return unpackInt32(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined));
+	    },
+	    getUint32: function getUint32(byteOffset /* , littleEndian */) {
+	      return unpackInt32(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)) >>> 0;
+	    },
+	    getFloat32: function getFloat32(byteOffset /* , littleEndian */) {
+	      return unpackIEEE754(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 23);
+	    },
+	    getFloat64: function getFloat64(byteOffset /* , littleEndian */) {
+	      return unpackIEEE754(get$4(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 52);
+	    },
+	    setInt8: function setInt8(byteOffset, value) {
+	      set$3(this, 1, byteOffset, packInt8, value);
+	    },
+	    setUint8: function setUint8(byteOffset, value) {
+	      set$3(this, 1, byteOffset, packInt8, value);
+	    },
+	    setInt16: function setInt16(byteOffset, value /* , littleEndian */) {
+	      set$3(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
+	    },
+	    setUint16: function setUint16(byteOffset, value /* , littleEndian */) {
+	      set$3(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
+	    },
+	    setInt32: function setInt32(byteOffset, value /* , littleEndian */) {
+	      set$3(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
+	    },
+	    setUint32: function setUint32(byteOffset, value /* , littleEndian */) {
+	      set$3(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
+	    },
+	    setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {
+	      set$3(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : undefined);
+	    },
+	    setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {
+	      set$3(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : undefined);
+	    }
+	  });
+	} else {
+	  var INCORRECT_ARRAY_BUFFER_NAME = PROPER_FUNCTION_NAME$2 && NativeArrayBuffer$1.name !== ARRAY_BUFFER$1;
+	  /* eslint-disable no-new -- required for testing */
+	  if (!fails$J(function () {
+	    NativeArrayBuffer$1(1);
+	  }) || !fails$J(function () {
+	    new NativeArrayBuffer$1(-1);
+	  }) || fails$J(function () {
+	    new NativeArrayBuffer$1();
+	    new NativeArrayBuffer$1(1.5);
+	    new NativeArrayBuffer$1(NaN);
+	    return INCORRECT_ARRAY_BUFFER_NAME && !CONFIGURABLE_FUNCTION_NAME;
+	  })) {
+	  /* eslint-enable no-new -- required for testing */
+	    $ArrayBuffer = function ArrayBuffer(length) {
+	      anInstance$6(this, ArrayBufferPrototype$1);
+	      return new NativeArrayBuffer$1(toIndex$1(length));
+	    };
+
+	    $ArrayBuffer[PROTOTYPE] = ArrayBufferPrototype$1;
+
+	    for (var keys$2 = getOwnPropertyNames$4(NativeArrayBuffer$1), j$2 = 0, key$1; keys$2.length > j$2;) {
+	      if (!((key$1 = keys$2[j$2++]) in $ArrayBuffer)) {
+	        createNonEnumerableProperty$5($ArrayBuffer, key$1, NativeArrayBuffer$1[key$1]);
+	      }
+	    }
 
-	defineProperties_1(boundFindShim, {
-		getPolyfill: polyfill$4,
-		implementation: implementation$3,
-		shim: shim$8
-	});
+	    ArrayBufferPrototype$1.constructor = $ArrayBuffer;
+	  } else if (INCORRECT_ARRAY_BUFFER_NAME && CONFIGURABLE_FUNCTION_NAME) {
+	    createNonEnumerableProperty$5(NativeArrayBuffer$1, 'name', ARRAY_BUFFER$1);
+	  }
 
-	var array_prototype_find = boundFindShim;
-
-	var implementation$4 = function findIndex(predicate) {
-		var list = ToObject(this);
-		var length = ToLength(list.length);
-		if (!IsCallable(predicate)) {
-			throw new TypeError('Array#findIndex: predicate must be a function');
-		}
-
-		if (length === 0) {
-			return -1;
-		}
-
-		var thisArg;
-		if (arguments.length > 0) {
-			thisArg = arguments[1];
-		}
-
-		for (var i = 0, value; i < length; i++) {
-			value = list[i];
-			// inlined for performance: if (Call(predicate, thisArg, [value, i, list])) return i;
-			if (predicate.apply(thisArg, [value, i, list])) {
-				return i;
-			}
-		}
-
-		return -1;
-	};
+	  // WebKit bug - the same parent prototype for typed arrays and data view
+	  if (setPrototypeOf$5 && getPrototypeOf$2(DataViewPrototype$1) !== ObjectPrototype$2) {
+	    setPrototypeOf$5(DataViewPrototype$1, ObjectPrototype$2);
+	  }
+
+	  // iOS Safari 7.x bug
+	  var testView = new $DataView(new $ArrayBuffer(2));
+	  var $setInt8 = uncurryThis$E(DataViewPrototype$1.setInt8);
+	  testView.setInt8(0, 2147483648);
+	  testView.setInt8(1, 2147483649);
+	  if (testView.getInt8(0) || !testView.getInt8(1)) redefineAll$3(DataViewPrototype$1, {
+	    setInt8: function setInt8(byteOffset, value) {
+	      $setInt8(this, byteOffset, value << 24 >> 24);
+	    },
+	    setUint8: function setUint8(byteOffset, value) {
+	      $setInt8(this, byteOffset, value << 24 >> 24);
+	    }
+	  }, { unsafe: true });
+	}
 
-	var polyfill$6 = function getPolyfill() {
-		// Detect if an implementation exists
-		// Detect early implementations which skipped holes in sparse arrays
-		// eslint-disable-next-line no-sparse-arrays
-		var implemented = Array.prototype.findIndex && ([, 1].findIndex(function (item, idx) {
-			return idx === 0;
-		}) === 0);
+	setToStringTag$6($ArrayBuffer, ARRAY_BUFFER$1);
+	setToStringTag$6($DataView, DATA_VIEW);
 
-		return implemented ? Array.prototype.findIndex : implementation$4;
+	var arrayBuffer = {
+	  ArrayBuffer: $ArrayBuffer,
+	  DataView: $DataView
 	};
 
-	var shim$9 = function shimFindIndex() {
-		var polyfill = polyfill$6();
+	var global$P = global$1o;
+	var isConstructor$2 = isConstructor$4;
+	var tryToString$3 = tryToString$5;
 
-		defineProperties_1(Array.prototype, { findIndex: polyfill }, {
-			findIndex: function () {
-				return Array.prototype.findIndex !== polyfill;
-			}
-		});
+	var TypeError$f = global$P.TypeError;
 
-		return polyfill;
+	// `Assert: IsConstructor(argument) is true`
+	var aConstructor$3 = function (argument) {
+	  if (isConstructor$2(argument)) return argument;
+	  throw TypeError$f(tryToString$3(argument) + ' is not a constructor');
 	};
 
-	var slice$3 = Array.prototype.slice;
+	var anObject$g = anObject$n;
+	var aConstructor$2 = aConstructor$3;
+	var wellKnownSymbol$h = wellKnownSymbol$t;
 
-	var polyfill$7 = polyfill$6();
+	var SPECIES$5 = wellKnownSymbol$h('species');
 
-	var boundShim = function findIndex(array, predicate) { // eslint-disable-line no-unused-vars
-		RequireObjectCoercible(array);
-		var args = slice$3.call(arguments, 1);
-		return polyfill$7.apply(array, args);
+	// `SpeciesConstructor` abstract operation
+	// https://tc39.es/ecma262/#sec-speciesconstructor
+	var speciesConstructor$5 = function (O, defaultConstructor) {
+	  var C = anObject$g(O).constructor;
+	  var S;
+	  return C === undefined || (S = anObject$g(C)[SPECIES$5]) == undefined ? defaultConstructor : aConstructor$2(S);
 	};
 
-	defineProperties_1(boundShim, {
-		getPolyfill: polyfill$6,
-		implementation: implementation$4,
-		shim: shim$9
-	});
+	var $$19 = _export;
+	var uncurryThis$D = functionUncurryThis;
+	var fails$I = fails$V;
+	var ArrayBufferModule$2 = arrayBuffer;
+	var anObject$f = anObject$n;
+	var toAbsoluteIndex$5 = toAbsoluteIndex$9;
+	var toLength$8 = toLength$c;
+	var speciesConstructor$4 = speciesConstructor$5;
 
-	var array_prototype_findindex = boundShim;
+	var ArrayBuffer$4 = ArrayBufferModule$2.ArrayBuffer;
+	var DataView$2 = ArrayBufferModule$2.DataView;
+	var DataViewPrototype = DataView$2.prototype;
+	var un$ArrayBufferSlice = uncurryThis$D(ArrayBuffer$4.prototype.slice);
+	var getUint8 = uncurryThis$D(DataViewPrototype.getUint8);
+	var setUint8 = uncurryThis$D(DataViewPrototype.setUint8);
 
-	var $apply$1 = GetIntrinsic('%Reflect.apply%', true) || callBound('%Function.prototype.apply%');
+	var INCORRECT_SLICE = fails$I(function () {
+	  return !new ArrayBuffer$4(2).slice(1, undefined).byteLength;
+	});
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-call
+	// `ArrayBuffer.prototype.slice` method
+	// https://tc39.es/ecma262/#sec-arraybuffer.prototype.slice
+	$$19({ target: 'ArrayBuffer', proto: true, unsafe: true, forced: INCORRECT_SLICE }, {
+	  slice: function slice(start, end) {
+	    if (un$ArrayBufferSlice && end === undefined) {
+	      return un$ArrayBufferSlice(anObject$f(this), start); // FF fix
+	    }
+	    var length = anObject$f(this).byteLength;
+	    var first = toAbsoluteIndex$5(start, length);
+	    var fin = toAbsoluteIndex$5(end === undefined ? length : end, length);
+	    var result = new (speciesConstructor$4(this, ArrayBuffer$4))(toLength$8(fin - first));
+	    var viewSource = new DataView$2(this);
+	    var viewTarget = new DataView$2(result);
+	    var index = 0;
+	    while (first < fin) {
+	      setUint8(viewTarget, index++, getUint8(viewSource, first++));
+	    } return result;
+	  }
+	});
 
-	var Call = function Call(F, V) {
-		var args = arguments.length > 2 ? arguments[2] : [];
-		return $apply$1(F, V, args);
-	};
+	var $$18 = _export;
+	var ArrayBufferModule$1 = arrayBuffer;
+	var NATIVE_ARRAY_BUFFER$1 = arrayBufferNative;
 
-	var $defineProperty = GetIntrinsic('%Object.defineProperty%', true);
-
-	if ($defineProperty) {
-		try {
-			$defineProperty({}, 'a', { value: 1 });
-		} catch (e) {
-			// IE 8 has a broken defineProperty
-			$defineProperty = null;
-		}
-	}
-
-
-
-	var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable');
-
-	// eslint-disable-next-line max-params
-	var DefineOwnProperty = function DefineOwnProperty(IsDataDescriptor, SameValue, FromPropertyDescriptor, O, P, desc) {
-		if (!$defineProperty) {
-			if (!IsDataDescriptor(desc)) {
-				// ES3 does not support getters/setters
-				return false;
-			}
-			if (!desc['[[Configurable]]'] || !desc['[[Writable]]']) {
-				return false;
-			}
-
-			// fallback for ES3
-			if (P in O && $isEnumerable(O, P) !== !!desc['[[Enumerable]]']) {
-				// a non-enumerable existing property
-				return false;
-			}
-
-			// property does not exist at all, or exists but is enumerable
-			var V = desc['[[Value]]'];
-			// eslint-disable-next-line no-param-reassign
-			O[P] = V; // will use [[Define]]
-			return SameValue(O[P], V);
-		}
-		$defineProperty(O, P, FromPropertyDescriptor(desc));
-		return true;
-	};
+	// `DataView` constructor
+	// https://tc39.es/ecma262/#sec-dataview-constructor
+	$$18({ global: true, forced: !NATIVE_ARRAY_BUFFER$1 }, {
+	  DataView: ArrayBufferModule$1.DataView
+	});
 
-	var src = functionBind.call(Function.call, Object.prototype.hasOwnProperty);
-
-	var $TypeError$3 = GetIntrinsic('%TypeError%');
-	var $SyntaxError = GetIntrinsic('%SyntaxError%');
-
-
-
-	var predicates = {
-		// https://ecma-international.org/ecma-262/6.0/#sec-property-descriptor-specification-type
-		'Property Descriptor': function isPropertyDescriptor(Type, Desc) {
-			if (Type(Desc) !== 'Object') {
-				return false;
-			}
-			var allowed = {
-				'[[Configurable]]': true,
-				'[[Enumerable]]': true,
-				'[[Get]]': true,
-				'[[Set]]': true,
-				'[[Value]]': true,
-				'[[Writable]]': true
-			};
-
-			for (var key in Desc) { // eslint-disable-line
-				if (src(Desc, key) && !allowed[key]) {
-					return false;
-				}
-			}
-
-			var isData = src(Desc, '[[Value]]');
-			var IsAccessor = src(Desc, '[[Get]]') || src(Desc, '[[Set]]');
-			if (isData && IsAccessor) {
-				throw new $TypeError$3('Property Descriptors may not be both accessor and data descriptors');
-			}
-			return true;
-		}
+	var NATIVE_ARRAY_BUFFER = arrayBufferNative;
+	var DESCRIPTORS$e = descriptors;
+	var global$O = global$1o;
+	var isCallable$9 = isCallable$r;
+	var isObject$k = isObject$s;
+	var hasOwn$9 = hasOwnProperty_1;
+	var classof$7 = classof$d;
+	var tryToString$2 = tryToString$5;
+	var createNonEnumerableProperty$4 = createNonEnumerableProperty$b;
+	var redefine$9 = redefine$h.exports;
+	var defineProperty$7 = objectDefineProperty.f;
+	var isPrototypeOf$5 = objectIsPrototypeOf;
+	var getPrototypeOf$1 = objectGetPrototypeOf;
+	var setPrototypeOf$4 = objectSetPrototypeOf;
+	var wellKnownSymbol$g = wellKnownSymbol$t;
+	var uid$1 = uid$5;
+
+	var Int8Array$4 = global$O.Int8Array;
+	var Int8ArrayPrototype$1 = Int8Array$4 && Int8Array$4.prototype;
+	var Uint8ClampedArray$1 = global$O.Uint8ClampedArray;
+	var Uint8ClampedArrayPrototype = Uint8ClampedArray$1 && Uint8ClampedArray$1.prototype;
+	var TypedArray$1 = Int8Array$4 && getPrototypeOf$1(Int8Array$4);
+	var TypedArrayPrototype$2 = Int8ArrayPrototype$1 && getPrototypeOf$1(Int8ArrayPrototype$1);
+	var ObjectPrototype$1 = Object.prototype;
+	var TypeError$e = global$O.TypeError;
+
+	var TO_STRING_TAG = wellKnownSymbol$g('toStringTag');
+	var TYPED_ARRAY_TAG$1 = uid$1('TYPED_ARRAY_TAG');
+	var TYPED_ARRAY_CONSTRUCTOR$2 = uid$1('TYPED_ARRAY_CONSTRUCTOR');
+	// Fixing native typed arrays in Opera Presto crashes the browser, see #595
+	var NATIVE_ARRAY_BUFFER_VIEWS$3 = NATIVE_ARRAY_BUFFER && !!setPrototypeOf$4 && classof$7(global$O.opera) !== 'Opera';
+	var TYPED_ARRAY_TAG_REQUIRED = false;
+	var NAME$1, Constructor, Prototype;
+
+	var TypedArrayConstructorsList = {
+	  Int8Array: 1,
+	  Uint8Array: 1,
+	  Uint8ClampedArray: 1,
+	  Int16Array: 2,
+	  Uint16Array: 2,
+	  Int32Array: 4,
+	  Uint32Array: 4,
+	  Float32Array: 4,
+	  Float64Array: 8
+	};
+
+	var BigIntArrayConstructorsList = {
+	  BigInt64Array: 8,
+	  BigUint64Array: 8
+	};
+
+	var isView = function isView(it) {
+	  if (!isObject$k(it)) return false;
+	  var klass = classof$7(it);
+	  return klass === 'DataView'
+	    || hasOwn$9(TypedArrayConstructorsList, klass)
+	    || hasOwn$9(BigIntArrayConstructorsList, klass);
+	};
+
+	var isTypedArray$1 = function (it) {
+	  if (!isObject$k(it)) return false;
+	  var klass = classof$7(it);
+	  return hasOwn$9(TypedArrayConstructorsList, klass)
+	    || hasOwn$9(BigIntArrayConstructorsList, klass);
+	};
+
+	var aTypedArray$m = function (it) {
+	  if (isTypedArray$1(it)) return it;
+	  throw TypeError$e('Target is not a typed array');
+	};
+
+	var aTypedArrayConstructor$3 = function (C) {
+	  if (isCallable$9(C) && (!setPrototypeOf$4 || isPrototypeOf$5(TypedArray$1, C))) return C;
+	  throw TypeError$e(tryToString$2(C) + ' is not a typed array constructor');
+	};
+
+	var exportTypedArrayMethod$n = function (KEY, property, forced, options) {
+	  if (!DESCRIPTORS$e) return;
+	  if (forced) for (var ARRAY in TypedArrayConstructorsList) {
+	    var TypedArrayConstructor = global$O[ARRAY];
+	    if (TypedArrayConstructor && hasOwn$9(TypedArrayConstructor.prototype, KEY)) try {
+	      delete TypedArrayConstructor.prototype[KEY];
+	    } catch (error) {
+	      // old WebKit bug - some methods are non-configurable
+	      try {
+	        TypedArrayConstructor.prototype[KEY] = property;
+	      } catch (error2) { /* empty */ }
+	    }
+	  }
+	  if (!TypedArrayPrototype$2[KEY] || forced) {
+	    redefine$9(TypedArrayPrototype$2, KEY, forced ? property
+	      : NATIVE_ARRAY_BUFFER_VIEWS$3 && Int8ArrayPrototype$1[KEY] || property, options);
+	  }
 	};
 
-	var assertRecord = function assertRecord(Type, recordType, argumentName, value) {
-		var predicate = predicates[recordType];
-		if (typeof predicate !== 'function') {
-			throw new $SyntaxError('unknown record type: ' + recordType);
-		}
-		if (!predicate(Type, value)) {
-			throw new $TypeError$3(argumentName + ' must be a ' + recordType);
-		}
+	var exportTypedArrayStaticMethod$1 = function (KEY, property, forced) {
+	  var ARRAY, TypedArrayConstructor;
+	  if (!DESCRIPTORS$e) return;
+	  if (setPrototypeOf$4) {
+	    if (forced) for (ARRAY in TypedArrayConstructorsList) {
+	      TypedArrayConstructor = global$O[ARRAY];
+	      if (TypedArrayConstructor && hasOwn$9(TypedArrayConstructor, KEY)) try {
+	        delete TypedArrayConstructor[KEY];
+	      } catch (error) { /* empty */ }
+	    }
+	    if (!TypedArray$1[KEY] || forced) {
+	      // V8 ~ Chrome 49-50 `%TypedArray%` methods are non-writable non-configurable
+	      try {
+	        return redefine$9(TypedArray$1, KEY, forced ? property : NATIVE_ARRAY_BUFFER_VIEWS$3 && TypedArray$1[KEY] || property);
+	      } catch (error) { /* empty */ }
+	    } else return;
+	  }
+	  for (ARRAY in TypedArrayConstructorsList) {
+	    TypedArrayConstructor = global$O[ARRAY];
+	    if (TypedArrayConstructor && (!TypedArrayConstructor[KEY] || forced)) {
+	      redefine$9(TypedArrayConstructor, KEY, property);
+	    }
+	  }
 	};
 
-	// https://www.ecma-international.org/ecma-262/5.1/#sec-8
-
-	var Type = function Type(x) {
-		if (x === null) {
-			return 'Null';
-		}
-		if (typeof x === 'undefined') {
-			return 'Undefined';
-		}
-		if (typeof x === 'function' || typeof x === 'object') {
-			return 'Object';
-		}
-		if (typeof x === 'number') {
-			return 'Number';
-		}
-		if (typeof x === 'boolean') {
-			return 'Boolean';
-		}
-		if (typeof x === 'string') {
-			return 'String';
-		}
-	};
+	for (NAME$1 in TypedArrayConstructorsList) {
+	  Constructor = global$O[NAME$1];
+	  Prototype = Constructor && Constructor.prototype;
+	  if (Prototype) createNonEnumerableProperty$4(Prototype, TYPED_ARRAY_CONSTRUCTOR$2, Constructor);
+	  else NATIVE_ARRAY_BUFFER_VIEWS$3 = false;
+	}
 
-	// https://ecma-international.org/ecma-262/6.0/#sec-ecmascript-data-types-and-values
+	for (NAME$1 in BigIntArrayConstructorsList) {
+	  Constructor = global$O[NAME$1];
+	  Prototype = Constructor && Constructor.prototype;
+	  if (Prototype) createNonEnumerableProperty$4(Prototype, TYPED_ARRAY_CONSTRUCTOR$2, Constructor);
+	}
 
-	var Type$1 = function Type$1(x) {
-		if (typeof x === 'symbol') {
-			return 'Symbol';
-		}
-		return Type(x);
-	};
+	// WebKit bug - typed arrays constructors prototype is Object.prototype
+	if (!NATIVE_ARRAY_BUFFER_VIEWS$3 || !isCallable$9(TypedArray$1) || TypedArray$1 === Function.prototype) {
+	  // eslint-disable-next-line no-shadow -- safe
+	  TypedArray$1 = function TypedArray() {
+	    throw TypeError$e('Incorrect invocation');
+	  };
+	  if (NATIVE_ARRAY_BUFFER_VIEWS$3) for (NAME$1 in TypedArrayConstructorsList) {
+	    if (global$O[NAME$1]) setPrototypeOf$4(global$O[NAME$1], TypedArray$1);
+	  }
+	}
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-frompropertydescriptor
-
-	var FromPropertyDescriptor = function FromPropertyDescriptor(Desc) {
-		if (typeof Desc === 'undefined') {
-			return Desc;
-		}
-
-		assertRecord(Type$1, 'Property Descriptor', 'Desc', Desc);
-
-		var obj = {};
-		if ('[[Value]]' in Desc) {
-			obj.value = Desc['[[Value]]'];
-		}
-		if ('[[Writable]]' in Desc) {
-			obj.writable = Desc['[[Writable]]'];
-		}
-		if ('[[Get]]' in Desc) {
-			obj.get = Desc['[[Get]]'];
-		}
-		if ('[[Set]]' in Desc) {
-			obj.set = Desc['[[Set]]'];
-		}
-		if ('[[Enumerable]]' in Desc) {
-			obj.enumerable = Desc['[[Enumerable]]'];
-		}
-		if ('[[Configurable]]' in Desc) {
-			obj.configurable = Desc['[[Configurable]]'];
-		}
-		return obj;
-	};
+	if (!NATIVE_ARRAY_BUFFER_VIEWS$3 || !TypedArrayPrototype$2 || TypedArrayPrototype$2 === ObjectPrototype$1) {
+	  TypedArrayPrototype$2 = TypedArray$1.prototype;
+	  if (NATIVE_ARRAY_BUFFER_VIEWS$3) for (NAME$1 in TypedArrayConstructorsList) {
+	    if (global$O[NAME$1]) setPrototypeOf$4(global$O[NAME$1].prototype, TypedArrayPrototype$2);
+	  }
+	}
+
+	// WebKit bug - one more object in Uint8ClampedArray prototype chain
+	if (NATIVE_ARRAY_BUFFER_VIEWS$3 && getPrototypeOf$1(Uint8ClampedArrayPrototype) !== TypedArrayPrototype$2) {
+	  setPrototypeOf$4(Uint8ClampedArrayPrototype, TypedArrayPrototype$2);
+	}
 
-	var $gOPD$1 = GetIntrinsic('%Object.getOwnPropertyDescriptor%');
-	if ($gOPD$1) {
-		try {
-			$gOPD$1([], 'length');
-		} catch (e) {
-			// IE 8 has a broken gOPD
-			$gOPD$1 = null;
-		}
+	if (DESCRIPTORS$e && !hasOwn$9(TypedArrayPrototype$2, TO_STRING_TAG)) {
+	  TYPED_ARRAY_TAG_REQUIRED = true;
+	  defineProperty$7(TypedArrayPrototype$2, TO_STRING_TAG, { get: function () {
+	    return isObject$k(this) ? this[TYPED_ARRAY_TAG$1] : undefined;
+	  } });
+	  for (NAME$1 in TypedArrayConstructorsList) if (global$O[NAME$1]) {
+	    createNonEnumerableProperty$4(global$O[NAME$1], TYPED_ARRAY_TAG$1, NAME$1);
+	  }
 	}
 
-	var getOwnPropertyDescriptor = $gOPD$1;
+	var arrayBufferViewCore = {
+	  NATIVE_ARRAY_BUFFER_VIEWS: NATIVE_ARRAY_BUFFER_VIEWS$3,
+	  TYPED_ARRAY_CONSTRUCTOR: TYPED_ARRAY_CONSTRUCTOR$2,
+	  TYPED_ARRAY_TAG: TYPED_ARRAY_TAG_REQUIRED && TYPED_ARRAY_TAG$1,
+	  aTypedArray: aTypedArray$m,
+	  aTypedArrayConstructor: aTypedArrayConstructor$3,
+	  exportTypedArrayMethod: exportTypedArrayMethod$n,
+	  exportTypedArrayStaticMethod: exportTypedArrayStaticMethod$1,
+	  isView: isView,
+	  isTypedArray: isTypedArray$1,
+	  TypedArray: TypedArray$1,
+	  TypedArrayPrototype: TypedArrayPrototype$2
+	};
+
+	var $$17 = _export;
+	var ArrayBufferViewCore$o = arrayBufferViewCore;
 
-	var $Array = GetIntrinsic('%Array%');
+	var NATIVE_ARRAY_BUFFER_VIEWS$2 = ArrayBufferViewCore$o.NATIVE_ARRAY_BUFFER_VIEWS;
 
-	// eslint-disable-next-line global-require
-	var toStr$6 = !$Array.isArray && callBound('Object.prototype.toString');
+	// `ArrayBuffer.isView` method
+	// https://tc39.es/ecma262/#sec-arraybuffer.isview
+	$$17({ target: 'ArrayBuffer', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS$2 }, {
+	  isView: ArrayBufferViewCore$o.isView
+	});
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isarray
+	var getBuiltIn$4 = getBuiltIn$b;
+	var definePropertyModule$1 = objectDefineProperty;
+	var wellKnownSymbol$f = wellKnownSymbol$t;
+	var DESCRIPTORS$d = descriptors;
 
-	var IsArray = $Array.isArray || function IsArray(argument) {
-		return toStr$6(argument) === '[object Array]';
-	};
+	var SPECIES$4 = wellKnownSymbol$f('species');
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-ispropertykey
+	var setSpecies$5 = function (CONSTRUCTOR_NAME) {
+	  var Constructor = getBuiltIn$4(CONSTRUCTOR_NAME);
+	  var defineProperty = definePropertyModule$1.f;
 
-	var IsPropertyKey = function IsPropertyKey(argument) {
-		return typeof argument === 'string' || typeof argument === 'symbol';
+	  if (DESCRIPTORS$d && Constructor && !Constructor[SPECIES$4]) {
+	    defineProperty(Constructor, SPECIES$4, {
+	      configurable: true,
+	      get: function () { return this; }
+	    });
+	  }
 	};
 
-	var hasSymbols$4 = hasSymbols$1();
-	var hasToStringTag$2 = hasSymbols$4 && typeof Symbol.toStringTag === 'symbol';
-	var regexExec;
-	var isRegexMarker;
-	var badStringifier;
+	var $$16 = _export;
+	var global$N = global$1o;
+	var arrayBufferModule = arrayBuffer;
+	var setSpecies$4 = setSpecies$5;
 
-	if (hasToStringTag$2) {
-		regexExec = Function.call.bind(RegExp.prototype.exec);
-		isRegexMarker = {};
+	var ARRAY_BUFFER = 'ArrayBuffer';
+	var ArrayBuffer$3 = arrayBufferModule[ARRAY_BUFFER];
+	var NativeArrayBuffer = global$N[ARRAY_BUFFER];
 
-		var throwRegexMarker = function () {
-			throw isRegexMarker;
-		};
-		badStringifier = {
-			toString: throwRegexMarker,
-			valueOf: throwRegexMarker
-		};
+	// `ArrayBuffer` constructor
+	// https://tc39.es/ecma262/#sec-arraybuffer-constructor
+	$$16({ global: true, forced: NativeArrayBuffer !== ArrayBuffer$3 }, {
+	  ArrayBuffer: ArrayBuffer$3
+	});
 
-		if (typeof Symbol.toPrimitive === 'symbol') {
-			badStringifier[Symbol.toPrimitive] = throwRegexMarker;
-		}
-	}
+	setSpecies$4(ARRAY_BUFFER);
 
-	var toStr$7 = Object.prototype.toString;
-	var regexClass = '[object RegExp]';
+	var fails$H = fails$V;
 
-	var isRegex = hasToStringTag$2
-		// eslint-disable-next-line consistent-return
-		? function isRegex(value) {
-			if (!value || typeof value !== 'object') {
-				return false;
-			}
+	var arrayMethodIsStrict$9 = function (METHOD_NAME, argument) {
+	  var method = [][METHOD_NAME];
+	  return !!method && fails$H(function () {
+	    // eslint-disable-next-line no-useless-call,no-throw-literal -- required for testing
+	    method.call(null, argument || function () { throw 1; }, 1);
+	  });
+	};
 
-			try {
-				regexExec(value, badStringifier);
-			} catch (e) {
-				return e === isRegexMarker;
-			}
-		}
-		: function isRegex(value) {
-			// In older browsers, typeof regex incorrectly returns 'function'
-			if (!value || (typeof value !== 'object' && typeof value !== 'function')) {
-				return false;
-			}
+	/* eslint-disable es/no-array-prototype-indexof -- required for testing */
+	var $$15 = _export;
+	var uncurryThis$C = functionUncurryThis;
+	var $IndexOf = arrayIncludes.indexOf;
+	var arrayMethodIsStrict$8 = arrayMethodIsStrict$9;
 
-			return toStr$7.call(value) === regexClass;
-		};
+	var un$IndexOf = uncurryThis$C([].indexOf);
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.2
+	var NEGATIVE_ZERO$1 = !!un$IndexOf && 1 / un$IndexOf([1], 1, -0) < 0;
+	var STRICT_METHOD$8 = arrayMethodIsStrict$8('indexOf');
 
-	var ToBoolean = function ToBoolean(value) { return !!value; };
+	// `Array.prototype.indexOf` method
+	// https://tc39.es/ecma262/#sec-array.prototype.indexof
+	$$15({ target: 'Array', proto: true, forced: NEGATIVE_ZERO$1 || !STRICT_METHOD$8 }, {
+	  indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {
+	    var fromIndex = arguments.length > 1 ? arguments[1] : undefined;
+	    return NEGATIVE_ZERO$1
+	      // convert -0 to +0
+	      ? un$IndexOf(this, searchElement, fromIndex) || 0
+	      : $IndexOf(this, searchElement, fromIndex);
+	  }
+	});
 
-	var $match = GetIntrinsic('%Symbol.match%', true);
+	var anObject$e = anObject$n;
+
+	// `RegExp.prototype.flags` getter implementation
+	// https://tc39.es/ecma262/#sec-get-regexp.prototype.flags
+	var regexpFlags$1 = function () {
+	  var that = anObject$e(this);
+	  var result = '';
+	  if (that.global) result += 'g';
+	  if (that.ignoreCase) result += 'i';
+	  if (that.multiline) result += 'm';
+	  if (that.dotAll) result += 's';
+	  if (that.unicode) result += 'u';
+	  if (that.sticky) result += 'y';
+	  return result;
+	};
 
+	var fails$G = fails$V;
+	var global$M = global$1o;
 
+	// babel-minify and Closure Compiler transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError
+	var $RegExp$2 = global$M.RegExp;
 
+	var UNSUPPORTED_Y$3 = fails$G(function () {
+	  var re = $RegExp$2('a', 'y');
+	  re.lastIndex = 2;
+	  return re.exec('abcd') != null;
+	});
 
+	// UC Browser bug
+	// https://github.com/zloirock/core-js/issues/1008
+	var MISSED_STICKY$1 = UNSUPPORTED_Y$3 || fails$G(function () {
+	  return !$RegExp$2('a', 'y').sticky;
+	});
 
-	// https://ecma-international.org/ecma-262/6.0/#sec-isregexp
+	var BROKEN_CARET = UNSUPPORTED_Y$3 || fails$G(function () {
+	  // https://bugzilla.mozilla.org/show_bug.cgi?id=773687
+	  var re = $RegExp$2('^r', 'gy');
+	  re.lastIndex = 2;
+	  return re.exec('str') != null;
+	});
 
-	var IsRegExp = function IsRegExp(argument) {
-		if (!argument || typeof argument !== 'object') {
-			return false;
-		}
-		if ($match) {
-			var isRegExp = argument[$match];
-			if (typeof isRegExp !== 'undefined') {
-				return ToBoolean(isRegExp);
-			}
-		}
-		return isRegex(argument);
+	var regexpStickyHelpers = {
+	  BROKEN_CARET: BROKEN_CARET,
+	  MISSED_STICKY: MISSED_STICKY$1,
+	  UNSUPPORTED_Y: UNSUPPORTED_Y$3
 	};
 
-	var $TypeError$4 = GetIntrinsic('%TypeError%');
-
-
-
-
-
-	// https://ecma-international.org/ecma-262/5.1/#sec-8.10.5
-
-	var ToPropertyDescriptor = function ToPropertyDescriptor(Obj) {
-		if (Type$1(Obj) !== 'Object') {
-			throw new $TypeError$4('ToPropertyDescriptor requires an object');
-		}
-
-		var desc = {};
-		if (src(Obj, 'enumerable')) {
-			desc['[[Enumerable]]'] = ToBoolean(Obj.enumerable);
-		}
-		if (src(Obj, 'configurable')) {
-			desc['[[Configurable]]'] = ToBoolean(Obj.configurable);
-		}
-		if (src(Obj, 'value')) {
-			desc['[[Value]]'] = Obj.value;
-		}
-		if (src(Obj, 'writable')) {
-			desc['[[Writable]]'] = ToBoolean(Obj.writable);
-		}
-		if (src(Obj, 'get')) {
-			var getter = Obj.get;
-			if (typeof getter !== 'undefined' && !IsCallable(getter)) {
-				throw new TypeError('getter must be a function');
-			}
-			desc['[[Get]]'] = getter;
-		}
-		if (src(Obj, 'set')) {
-			var setter = Obj.set;
-			if (typeof setter !== 'undefined' && !IsCallable(setter)) {
-				throw new $TypeError$4('setter must be a function');
-			}
-			desc['[[Set]]'] = setter;
-		}
-
-		if ((src(desc, '[[Get]]') || src(desc, '[[Set]]')) && (src(desc, '[[Value]]') || src(desc, '[[Writable]]'))) {
-			throw new $TypeError$4('Invalid property descriptor. Cannot both specify accessors and a value or writable attribute');
-		}
-		return desc;
-	};
+	var fails$F = fails$V;
+	var global$L = global$1o;
 
-	var $TypeError$5 = GetIntrinsic('%TypeError%');
+	// babel-minify and Closure Compiler transpiles RegExp('.', 's') -> /./s and it causes SyntaxError
+	var $RegExp$1 = global$L.RegExp;
 
+	var regexpUnsupportedDotAll = fails$F(function () {
+	  var re = $RegExp$1('.', 's');
+	  return !(re.dotAll && re.exec('\n') && re.flags === 's');
+	});
 
+	var fails$E = fails$V;
+	var global$K = global$1o;
 
-	var $isEnumerable$1 = callBound('Object.prototype.propertyIsEnumerable');
+	// babel-minify and Closure Compiler transpiles RegExp('(?<a>b)', 'g') -> /(?<a>b)/g and it causes SyntaxError
+	var $RegExp = global$K.RegExp;
 
+	var regexpUnsupportedNcg = fails$E(function () {
+	  var re = $RegExp('(?<a>b)', 'g');
+	  return re.exec('b').groups.a !== 'b' ||
+	    'b'.replace(re, '$<a>c') !== 'bc';
+	});
 
+	/* eslint-disable regexp/no-empty-capturing-group, regexp/no-empty-group, regexp/no-lazy-ends -- testing */
+	/* eslint-disable regexp/no-useless-quantifier -- testing */
+	var call$i = functionCall;
+	var uncurryThis$B = functionUncurryThis;
+	var toString$g = toString$k;
+	var regexpFlags = regexpFlags$1;
+	var stickyHelpers$2 = regexpStickyHelpers;
+	var shared = shared$5.exports;
+	var create$8 = objectCreate;
+	var getInternalState$2 = internalState.get;
+	var UNSUPPORTED_DOT_ALL$1 = regexpUnsupportedDotAll;
+	var UNSUPPORTED_NCG$1 = regexpUnsupportedNcg;
+
+	var nativeReplace = shared('native-string-replace', String.prototype.replace);
+	var nativeExec = RegExp.prototype.exec;
+	var patchedExec = nativeExec;
+	var charAt$6 = uncurryThis$B(''.charAt);
+	var indexOf = uncurryThis$B(''.indexOf);
+	var replace$7 = uncurryThis$B(''.replace);
+	var stringSlice$9 = uncurryThis$B(''.slice);
+
+	var UPDATES_LAST_INDEX_WRONG = (function () {
+	  var re1 = /a/;
+	  var re2 = /b*/g;
+	  call$i(nativeExec, re1, 'a');
+	  call$i(nativeExec, re2, 'a');
+	  return re1.lastIndex !== 0 || re2.lastIndex !== 0;
+	})();
 
+	var UNSUPPORTED_Y$2 = stickyHelpers$2.BROKEN_CARET;
 
+	// nonparticipating capturing group, copied from es5-shim's String#split patch.
+	var NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;
 
+	var PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y$2 || UNSUPPORTED_DOT_ALL$1 || UNSUPPORTED_NCG$1;
 
+	if (PATCH) {
+	  patchedExec = function exec(string) {
+	    var re = this;
+	    var state = getInternalState$2(re);
+	    var str = toString$g(string);
+	    var raw = state.raw;
+	    var result, reCopy, lastIndex, match, i, object, group;
 
+	    if (raw) {
+	      raw.lastIndex = re.lastIndex;
+	      result = call$i(patchedExec, raw, str);
+	      re.lastIndex = raw.lastIndex;
+	      return result;
+	    }
 
+	    var groups = state.groups;
+	    var sticky = UNSUPPORTED_Y$2 && re.sticky;
+	    var flags = call$i(regexpFlags, re);
+	    var source = re.source;
+	    var charsAdded = 0;
+	    var strCopy = str;
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-ordinarygetownproperty
+	    if (sticky) {
+	      flags = replace$7(flags, 'y', '');
+	      if (indexOf(flags, 'g') === -1) {
+	        flags += 'g';
+	      }
 
-	var OrdinaryGetOwnProperty = function OrdinaryGetOwnProperty(O, P) {
-		if (Type$1(O) !== 'Object') {
-			throw new $TypeError$5('Assertion failed: O must be an Object');
-		}
-		if (!IsPropertyKey(P)) {
-			throw new $TypeError$5('Assertion failed: P must be a Property Key');
-		}
-		if (!src(O, P)) {
-			return void 0;
-		}
-		if (!getOwnPropertyDescriptor) {
-			// ES3 / IE 8 fallback
-			var arrayLength = IsArray(O) && P === 'length';
-			var regexLastIndex = IsRegExp(O) && P === 'lastIndex';
-			return {
-				'[[Configurable]]': !(arrayLength || regexLastIndex),
-				'[[Enumerable]]': $isEnumerable$1(O, P),
-				'[[Value]]': O[P],
-				'[[Writable]]': true
-			};
-		}
-		return ToPropertyDescriptor(getOwnPropertyDescriptor(O, P));
-	};
+	      strCopy = stringSlice$9(str, re.lastIndex);
+	      // Support anchored sticky behavior.
+	      if (re.lastIndex > 0 && (!re.multiline || re.multiline && charAt$6(str, re.lastIndex - 1) !== '\n')) {
+	        source = '(?: ' + source + ')';
+	        strCopy = ' ' + strCopy;
+	        charsAdded++;
+	      }
+	      // ^(? + rx + ) is needed, in combination with some str slicing, to
+	      // simulate the 'y' flag.
+	      reCopy = new RegExp('^(?:' + source + ')', flags);
+	    }
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isdatadescriptor
+	    if (NPCG_INCLUDED) {
+	      reCopy = new RegExp('^' + source + '$(?!\\s)', flags);
+	    }
+	    if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;
 
-	var IsDataDescriptor = function IsDataDescriptor(Desc) {
-		if (typeof Desc === 'undefined') {
-			return false;
-		}
+	    match = call$i(nativeExec, sticky ? reCopy : re, strCopy);
 
-		assertRecord(Type$1, 'Property Descriptor', 'Desc', Desc);
+	    if (sticky) {
+	      if (match) {
+	        match.input = stringSlice$9(match.input, charsAdded);
+	        match[0] = stringSlice$9(match[0], charsAdded);
+	        match.index = re.lastIndex;
+	        re.lastIndex += match[0].length;
+	      } else re.lastIndex = 0;
+	    } else if (UPDATES_LAST_INDEX_WRONG && match) {
+	      re.lastIndex = re.global ? match.index + match[0].length : lastIndex;
+	    }
+	    if (NPCG_INCLUDED && match && match.length > 1) {
+	      // Fix browsers whose `exec` methods don't consistently return `undefined`
+	      // for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/
+	      call$i(nativeReplace, match[0], reCopy, function () {
+	        for (i = 1; i < arguments.length - 2; i++) {
+	          if (arguments[i] === undefined) match[i] = undefined;
+	        }
+	      });
+	    }
 
-		if (!src(Desc, '[[Value]]') && !src(Desc, '[[Writable]]')) {
-			return false;
-		}
+	    if (match && groups) {
+	      match.groups = object = create$8(null);
+	      for (i = 0; i < groups.length; i++) {
+	        group = groups[i];
+	        object[group[0]] = match[group[1]];
+	      }
+	    }
 
-		return true;
-	};
+	    return match;
+	  };
+	}
 
-	var $Object$1 = GetIntrinsic('%Object%');
+	var regexpExec$3 = patchedExec;
 
+	var $$14 = _export;
+	var exec$5 = regexpExec$3;
 
+	// `RegExp.prototype.exec` method
+	// https://tc39.es/ecma262/#sec-regexp.prototype.exec
+	$$14({ target: 'RegExp', proto: true, forced: /./.exec !== exec$5 }, {
+	  exec: exec$5
+	});
 
-	var $preventExtensions = $Object$1.preventExtensions;
-	var $isExtensible = $Object$1.isExtensible;
+	var fails$D = fails$V;
+	var wellKnownSymbol$e = wellKnownSymbol$t;
+	var V8_VERSION$2 = engineV8Version;
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isextensible-o
+	var SPECIES$3 = wellKnownSymbol$e('species');
 
-	var IsExtensible = $preventExtensions
-		? function IsExtensible(obj) {
-			return !isPrimitive(obj) && $isExtensible(obj);
-		}
-		: function IsExtensible(obj) {
-			return !isPrimitive(obj);
-		};
+	var arrayMethodHasSpeciesSupport$5 = function (METHOD_NAME) {
+	  // We can't use this feature detection in V8 since it causes
+	  // deoptimization and serious performance degradation
+	  // https://github.com/zloirock/core-js/issues/677
+	  return V8_VERSION$2 >= 51 || !fails$D(function () {
+	    var array = [];
+	    var constructor = array.constructor = {};
+	    constructor[SPECIES$3] = function () {
+	      return { foo: 1 };
+	    };
+	    return array[METHOD_NAME](Boolean).foo !== 1;
+	  });
+	};
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.12
+	var $$13 = _export;
+	var $map$1 = arrayIteration.map;
+	var arrayMethodHasSpeciesSupport$4 = arrayMethodHasSpeciesSupport$5;
 
-	var SameValue = function SameValue(x, y) {
-		if (x === y) { // 0 === -0, but they are not identical.
-			if (x === 0) { return 1 / x === 1 / y; }
-			return true;
-		}
-		return _isNaN(x) && _isNaN(y);
-	};
+	var HAS_SPECIES_SUPPORT$3 = arrayMethodHasSpeciesSupport$4('map');
 
-	var $TypeError$6 = GetIntrinsic('%TypeError%');
+	// `Array.prototype.map` method
+	// https://tc39.es/ecma262/#sec-array.prototype.map
+	// with adding support of @@species
+	$$13({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$3 }, {
+	  map: function map(callbackfn /* , thisArg */) {
+	    return $map$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
+	var $forEach$1 = arrayIteration.forEach;
+	var arrayMethodIsStrict$7 = arrayMethodIsStrict$9;
 
+	var STRICT_METHOD$7 = arrayMethodIsStrict$7('forEach');
 
+	// `Array.prototype.forEach` method implementation
+	// https://tc39.es/ecma262/#sec-array.prototype.foreach
+	var arrayForEach = !STRICT_METHOD$7 ? function forEach(callbackfn /* , thisArg */) {
+	  return $forEach$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	// eslint-disable-next-line es/no-array-prototype-foreach -- safe
+	} : [].forEach;
 
+	var $$12 = _export;
+	var forEach$3 = arrayForEach;
 
+	// `Array.prototype.forEach` method
+	// https://tc39.es/ecma262/#sec-array.prototype.foreach
+	// eslint-disable-next-line es/no-array-prototype-foreach -- safe
+	$$12({ target: 'Array', proto: true, forced: [].forEach != forEach$3 }, {
+	  forEach: forEach$3
+	});
 
+	var global$J = global$1o;
+	var DOMIterables = domIterables;
+	var DOMTokenListPrototype = domTokenListPrototype;
+	var forEach$2 = arrayForEach;
+	var createNonEnumerableProperty$3 = createNonEnumerableProperty$b;
 
+	var handlePrototype = function (CollectionPrototype) {
+	  // some Chrome versions have non-configurable methods on DOMTokenList
+	  if (CollectionPrototype && CollectionPrototype.forEach !== forEach$2) try {
+	    createNonEnumerableProperty$3(CollectionPrototype, 'forEach', forEach$2);
+	  } catch (error) {
+	    CollectionPrototype.forEach = forEach$2;
+	  }
+	};
 
+	for (var COLLECTION_NAME in DOMIterables) {
+	  if (DOMIterables[COLLECTION_NAME]) {
+	    handlePrototype(global$J[COLLECTION_NAME] && global$J[COLLECTION_NAME].prototype);
+	  }
+	}
 
+	handlePrototype(DOMTokenListPrototype);
 
+	var $$11 = _export;
+	var isArray$5 = isArray$8;
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-createdataproperty
+	// `Array.isArray` method
+	// https://tc39.es/ecma262/#sec-array.isarray
+	$$11({ target: 'Array', stat: true }, {
+	  isArray: isArray$5
+	});
 
-	var CreateDataProperty = function CreateDataProperty(O, P, V) {
-		if (Type$1(O) !== 'Object') {
-			throw new $TypeError$6('Assertion failed: Type(O) is not Object');
-		}
-		if (!IsPropertyKey(P)) {
-			throw new $TypeError$6('Assertion failed: IsPropertyKey(P) is not true');
-		}
-		var oldDesc = OrdinaryGetOwnProperty(O, P);
-		var extensible = !oldDesc || IsExtensible(O);
-		var immutable = oldDesc && (!oldDesc['[[Writable]]'] || !oldDesc['[[Configurable]]']);
-		if (immutable || !extensible) {
-			return false;
-		}
-		return DefineOwnProperty(
-			IsDataDescriptor,
-			SameValue,
-			FromPropertyDescriptor,
-			O,
-			P,
-			{
-				'[[Configurable]]': true,
-				'[[Enumerable]]': true,
-				'[[Value]]': V,
-				'[[Writable]]': true
-			}
-		);
-	};
+	var $$10 = _export;
+	var fails$C = fails$V;
+	var getOwnPropertyNames$3 = objectGetOwnPropertyNamesExternal.f;
 
-	var $TypeError$7 = GetIntrinsic('%TypeError%');
+	// eslint-disable-next-line es/no-object-getownpropertynames -- required for testing
+	var FAILS_ON_PRIMITIVES$5 = fails$C(function () { return !Object.getOwnPropertyNames(1); });
 
+	// `Object.getOwnPropertyNames` method
+	// https://tc39.es/ecma262/#sec-object.getownpropertynames
+	$$10({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$5 }, {
+	  getOwnPropertyNames: getOwnPropertyNames$3
+	});
 
+	var global$I = global$1o;
 
+	var nativePromiseConstructor = global$I.Promise;
 
+	var wellKnownSymbol$d = wellKnownSymbol$t;
+	var Iterators$1 = iterators;
 
-	// // https://ecma-international.org/ecma-262/6.0/#sec-createdatapropertyorthrow
+	var ITERATOR$7 = wellKnownSymbol$d('iterator');
+	var ArrayPrototype = Array.prototype;
 
-	var CreateDataPropertyOrThrow = function CreateDataPropertyOrThrow(O, P, V) {
-		if (Type$1(O) !== 'Object') {
-			throw new $TypeError$7('Assertion failed: Type(O) is not Object');
-		}
-		if (!IsPropertyKey(P)) {
-			throw new $TypeError$7('Assertion failed: IsPropertyKey(P) is not true');
-		}
-		var success = CreateDataProperty(O, P, V);
-		if (!success) {
-			throw new $TypeError$7('unable to create data property');
-		}
-		return success;
+	// check on default Array iterator
+	var isArrayIteratorMethod$3 = function (it) {
+	  return it !== undefined && (Iterators$1.Array === it || ArrayPrototype[ITERATOR$7] === it);
 	};
 
-	var hasMap = typeof Map === 'function' && Map.prototype;
-	var mapSizeDescriptor = Object.getOwnPropertyDescriptor && hasMap ? Object.getOwnPropertyDescriptor(Map.prototype, 'size') : null;
-	var mapSize = hasMap && mapSizeDescriptor && typeof mapSizeDescriptor.get === 'function' ? mapSizeDescriptor.get : null;
-	var mapForEach = hasMap && Map.prototype.forEach;
-	var hasSet = typeof Set === 'function' && Set.prototype;
-	var setSizeDescriptor = Object.getOwnPropertyDescriptor && hasSet ? Object.getOwnPropertyDescriptor(Set.prototype, 'size') : null;
-	var setSize = hasSet && setSizeDescriptor && typeof setSizeDescriptor.get === 'function' ? setSizeDescriptor.get : null;
-	var setForEach = hasSet && Set.prototype.forEach;
-	var booleanValueOf = Boolean.prototype.valueOf;
-	var objectToString$1 = Object.prototype.toString;
+	var classof$6 = classof$d;
+	var getMethod$5 = getMethod$7;
+	var Iterators = iterators;
+	var wellKnownSymbol$c = wellKnownSymbol$t;
 
-	var objectInspect = function inspect_ (obj, opts, depth, seen) {
-	    if (typeof obj === 'undefined') {
-	        return 'undefined';
-	    }
-	    if (obj === null) {
-	        return 'null';
-	    }
-	    if (typeof obj === 'boolean') {
-	        return obj ? 'true' : 'false';
-	    }
-	    if (typeof obj === 'string') {
-	        return inspectString(obj);
-	    }
-	    if (typeof obj === 'number') {
-	      if (obj === 0) {
-	        return Infinity / obj > 0 ? '0' : '-0';
-	      }
-	      return String(obj);
-	    }
+	var ITERATOR$6 = wellKnownSymbol$c('iterator');
 
-	    if (!opts) { opts = {}; }
+	var getIteratorMethod$5 = function (it) {
+	  if (it != undefined) return getMethod$5(it, ITERATOR$6)
+	    || getMethod$5(it, '@@iterator')
+	    || Iterators[classof$6(it)];
+	};
 
-	    var maxDepth = typeof opts.depth === 'undefined' ? 5 : opts.depth;
-	    if (typeof depth === 'undefined') { depth = 0; }
-	    if (depth >= maxDepth && maxDepth > 0 && typeof obj === 'object') {
-	        return '[Object]';
-	    }
+	var global$H = global$1o;
+	var call$h = functionCall;
+	var aCallable$7 = aCallable$a;
+	var anObject$d = anObject$n;
+	var tryToString$1 = tryToString$5;
+	var getIteratorMethod$4 = getIteratorMethod$5;
 
-	    if (typeof seen === 'undefined') { seen = []; }
-	    else if (indexOf$2(seen, obj) >= 0) {
-	        return '[Circular]';
-	    }
+	var TypeError$d = global$H.TypeError;
 
-	    function inspect (value, from) {
-	        if (from) {
-	            seen = seen.slice();
-	            seen.push(from);
-	        }
-	        return inspect_(value, opts, depth + 1, seen);
-	    }
+	var getIterator$4 = function (argument, usingIterator) {
+	  var iteratorMethod = arguments.length < 2 ? getIteratorMethod$4(argument) : usingIterator;
+	  if (aCallable$7(iteratorMethod)) return anObject$d(call$h(iteratorMethod, argument));
+	  throw TypeError$d(tryToString$1(argument) + ' is not iterable');
+	};
 
-	    if (typeof obj === 'function') {
-	        var name = nameOf(obj);
-	        return '[Function' + (name ? ': ' + name : '') + ']';
-	    }
-	    if (isSymbol$3(obj)) {
-	        var symString = Symbol.prototype.toString.call(obj);
-	        return typeof obj === 'object' ? markBoxed(symString) : symString;
-	    }
-	    if (isElement(obj)) {
-	        var s = '<' + String(obj.nodeName).toLowerCase();
-	        var attrs = obj.attributes || [];
-	        for (var i = 0; i < attrs.length; i++) {
-	            s += ' ' + attrs[i].name + '="' + quote(attrs[i].value) + '"';
-	        }
-	        s += '>';
-	        if (obj.childNodes && obj.childNodes.length) { s += '...'; }
-	        s += '</' + String(obj.nodeName).toLowerCase() + '>';
-	        return s;
-	    }
-	    if (isArray$3(obj)) {
-	        if (obj.length === 0) { return '[]'; }
-	        return '[ ' + arrObjKeys(obj, inspect).join(', ') + ' ]';
-	    }
-	    if (isError(obj)) {
-	        var parts = arrObjKeys(obj, inspect);
-	        if (parts.length === 0) { return '[' + String(obj) + ']'; }
-	        return '{ [' + String(obj) + '] ' + parts.join(', ') + ' }';
-	    }
-	    if (typeof obj === 'object' && typeof obj.inspect === 'function') {
-	        return obj.inspect();
-	    }
-	    if (isMap(obj)) {
-	        var parts = [];
-	        mapForEach.call(obj, function (value, key) {
-	            parts.push(inspect(key, obj) + ' => ' + inspect(value, obj));
-	        });
-	        return collectionOf('Map', mapSize.call(obj), parts);
-	    }
-	    if (isSet(obj)) {
-	        var parts = [];
-	        setForEach.call(obj, function (value ) {
-	            parts.push(inspect(value, obj));
-	        });
-	        return collectionOf('Set', setSize.call(obj), parts);
-	    }
-	    if (isNumber(obj)) {
-	        return markBoxed(Number(obj));
-	    }
-	    if (isBoolean(obj)) {
-	        return markBoxed(booleanValueOf.call(obj));
-	    }
-	    if (isString$1(obj)) {
-	        return markBoxed(inspect(String(obj)));
-	    }
-	    if (!isDate(obj) && !isRegExp(obj)) {
-	        var xs = arrObjKeys(obj, inspect);
-	        if (xs.length === 0) { return '{}'; }
-	        return '{ ' + xs.join(', ') + ' }';
+	var call$g = functionCall;
+	var anObject$c = anObject$n;
+	var getMethod$4 = getMethod$7;
+
+	var iteratorClose$2 = function (iterator, kind, value) {
+	  var innerResult, innerError;
+	  anObject$c(iterator);
+	  try {
+	    innerResult = getMethod$4(iterator, 'return');
+	    if (!innerResult) {
+	      if (kind === 'throw') throw value;
+	      return value;
 	    }
-	    return String(obj);
+	    innerResult = call$g(innerResult, iterator);
+	  } catch (error) {
+	    innerError = true;
+	    innerResult = error;
+	  }
+	  if (kind === 'throw') throw value;
+	  if (innerError) throw innerResult;
+	  anObject$c(innerResult);
+	  return value;
 	};
 
-	function quote (s) {
-	    return String(s).replace(/"/g, '&quot;');
-	}
+	var global$G = global$1o;
+	var bind$d = functionBindContext;
+	var call$f = functionCall;
+	var anObject$b = anObject$n;
+	var tryToString = tryToString$5;
+	var isArrayIteratorMethod$2 = isArrayIteratorMethod$3;
+	var lengthOfArrayLike$d = lengthOfArrayLike$i;
+	var isPrototypeOf$4 = objectIsPrototypeOf;
+	var getIterator$3 = getIterator$4;
+	var getIteratorMethod$3 = getIteratorMethod$5;
+	var iteratorClose$1 = iteratorClose$2;
 
-	function isArray$3 (obj) { return toStr$8(obj) === '[object Array]' }
-	function isDate (obj) { return toStr$8(obj) === '[object Date]' }
-	function isRegExp (obj) { return toStr$8(obj) === '[object RegExp]' }
-	function isError (obj) { return toStr$8(obj) === '[object Error]' }
-	function isSymbol$3 (obj) { return toStr$8(obj) === '[object Symbol]' }
-	function isString$1 (obj) { return toStr$8(obj) === '[object String]' }
-	function isNumber (obj) { return toStr$8(obj) === '[object Number]' }
-	function isBoolean (obj) { return toStr$8(obj) === '[object Boolean]' }
+	var TypeError$c = global$G.TypeError;
 
-	var hasOwn = Object.prototype.hasOwnProperty || function (key) { return key in this; };
-	function has$1 (obj, key) {
-	    return hasOwn.call(obj, key);
-	}
+	var Result = function (stopped, result) {
+	  this.stopped = stopped;
+	  this.result = result;
+	};
 
-	function toStr$8 (obj) {
-	    return objectToString$1.call(obj);
-	}
+	var ResultPrototype = Result.prototype;
 
-	function nameOf (f) {
-	    if (f.name) { return f.name; }
-	    var m = String(f).match(/^function\s*([\w$]+)/);
-	    if (m) { return m[1]; }
-	}
+	var iterate$3 = function (iterable, unboundFunction, options) {
+	  var that = options && options.that;
+	  var AS_ENTRIES = !!(options && options.AS_ENTRIES);
+	  var IS_ITERATOR = !!(options && options.IS_ITERATOR);
+	  var INTERRUPTED = !!(options && options.INTERRUPTED);
+	  var fn = bind$d(unboundFunction, that);
+	  var iterator, iterFn, index, length, result, next, step;
 
-	function indexOf$2 (xs, x) {
-	    if (xs.indexOf) { return xs.indexOf(x); }
-	    for (var i = 0, l = xs.length; i < l; i++) {
-	        if (xs[i] === x) { return i; }
-	    }
-	    return -1;
-	}
+	  var stop = function (condition) {
+	    if (iterator) iteratorClose$1(iterator, 'normal', condition);
+	    return new Result(true, condition);
+	  };
 
-	function isMap (x) {
-	    if (!mapSize) {
-	        return false;
+	  var callFn = function (value) {
+	    if (AS_ENTRIES) {
+	      anObject$b(value);
+	      return INTERRUPTED ? fn(value[0], value[1], stop) : fn(value[0], value[1]);
+	    } return INTERRUPTED ? fn(value, stop) : fn(value);
+	  };
+
+	  if (IS_ITERATOR) {
+	    iterator = iterable;
+	  } else {
+	    iterFn = getIteratorMethod$3(iterable);
+	    if (!iterFn) throw TypeError$c(tryToString(iterable) + ' is not iterable');
+	    // optimisation for array iterators
+	    if (isArrayIteratorMethod$2(iterFn)) {
+	      for (index = 0, length = lengthOfArrayLike$d(iterable); length > index; index++) {
+	        result = callFn(iterable[index]);
+	        if (result && isPrototypeOf$4(ResultPrototype, result)) return result;
+	      } return new Result(false);
 	    }
+	    iterator = getIterator$3(iterable, iterFn);
+	  }
+
+	  next = iterator.next;
+	  while (!(step = call$f(next, iterator)).done) {
 	    try {
-	        mapSize.call(x);
-	        try {
-	            setSize.call(x);
-	        } catch (s) {
-	            return true;
-	        }
-	        return x instanceof Map; // core-js workaround, pre-v2.5.0
-	    } catch (e) {}
-	    return false;
-	}
+	      result = callFn(step.value);
+	    } catch (error) {
+	      iteratorClose$1(iterator, 'throw', error);
+	    }
+	    if (typeof result == 'object' && result && isPrototypeOf$4(ResultPrototype, result)) return result;
+	  } return new Result(false);
+	};
 
-	function isSet (x) {
-	    if (!setSize) {
-	        return false;
+	var wellKnownSymbol$b = wellKnownSymbol$t;
+
+	var ITERATOR$5 = wellKnownSymbol$b('iterator');
+	var SAFE_CLOSING = false;
+
+	try {
+	  var called = 0;
+	  var iteratorWithReturn = {
+	    next: function () {
+	      return { done: !!called++ };
+	    },
+	    'return': function () {
+	      SAFE_CLOSING = true;
 	    }
-	    try {
-	        setSize.call(x);
-	        try {
-	            mapSize.call(x);
-	        } catch (m) {
-	            return true;
+	  };
+	  iteratorWithReturn[ITERATOR$5] = function () {
+	    return this;
+	  };
+	  // eslint-disable-next-line es/no-array-from, no-throw-literal -- required for testing
+	  Array.from(iteratorWithReturn, function () { throw 2; });
+	} catch (error) { /* empty */ }
+
+	var checkCorrectnessOfIteration$4 = function (exec, SKIP_CLOSING) {
+	  if (!SKIP_CLOSING && !SAFE_CLOSING) return false;
+	  var ITERATION_SUPPORT = false;
+	  try {
+	    var object = {};
+	    object[ITERATOR$5] = function () {
+	      return {
+	        next: function () {
+	          return { done: ITERATION_SUPPORT = true };
 	        }
-	        return x instanceof Set; // core-js workaround, pre-v2.5.0
-	    } catch (e) {}
-	    return false;
-	}
+	      };
+	    };
+	    exec(object);
+	  } catch (error) { /* empty */ }
+	  return ITERATION_SUPPORT;
+	};
 
-	function isElement (x) {
-	    if (!x || typeof x !== 'object') { return false; }
-	    if (typeof HTMLElement !== 'undefined' && x instanceof HTMLElement) {
-	        return true;
-	    }
-	    return typeof x.nodeName === 'string'
-	        && typeof x.getAttribute === 'function'
-	    ;
-	}
+	var global$F = global$1o;
 
-	function inspectString (str) {
-	    var s = str.replace(/(['\\])/g, '\\$1').replace(/[\x00-\x1f]/g, lowbyte);
-	    return "'" + s + "'";
-	}
+	var TypeError$b = global$F.TypeError;
 
-	function lowbyte (c) {
-	    var n = c.charCodeAt(0);
-	    var x = { 8: 'b', 9: 't', 10: 'n', 12: 'f', 13: 'r' }[n];
-	    if (x) { return '\\' + x; }
-	    return '\\x' + (n < 0x10 ? '0' : '') + n.toString(16);
-	}
+	var validateArgumentsLength$4 = function (passed, required) {
+	  if (passed < required) throw TypeError$b('Not enough arguments');
+	  return passed;
+	};
 
-	function markBoxed (str) {
-	    return 'Object(' + str + ')';
-	}
+	var userAgent$6 = engineUserAgent;
 
-	function collectionOf (type, size, entries) {
-	    return type + ' (' + size + ') {' + entries.join(', ') + '}';
-	}
+	var engineIsIos = /(?:ipad|iphone|ipod).*applewebkit/i.test(userAgent$6);
 
-	function arrObjKeys (obj, inspect) {
-	    var isArr = isArray$3(obj);
-	    var xs = [];
-	    if (isArr) {
-	        xs.length = obj.length;
-	        for (var i = 0; i < obj.length; i++) {
-	            xs[i] = has$1(obj, i) ? inspect(obj[i], obj) : '';
-	        }
-	    }
-	    for (var key in obj) {
-	        if (!has$1(obj, key)) { continue; }
-	        if (isArr && String(Number(key)) === key && key < obj.length) { continue; }
-	        if (/[^\w$]/.test(key)) {
-	            xs.push(inspect(key, obj) + ': ' + inspect(obj[key], obj));
-	        } else {
-	            xs.push(key + ': ' + inspect(obj[key], obj));
-	        }
-	    }
-	    return xs;
+	var classof$5 = classofRaw$1;
+	var global$E = global$1o;
+
+	var engineIsNode = classof$5(global$E.process) == 'process';
+
+	var global$D = global$1o;
+	var apply$7 = functionApply;
+	var bind$c = functionBindContext;
+	var isCallable$8 = isCallable$r;
+	var hasOwn$8 = hasOwnProperty_1;
+	var fails$B = fails$V;
+	var html = html$2;
+	var arraySlice$8 = arraySlice$b;
+	var createElement = documentCreateElement$2;
+	var validateArgumentsLength$3 = validateArgumentsLength$4;
+	var IS_IOS$1 = engineIsIos;
+	var IS_NODE$4 = engineIsNode;
+
+	var set$2 = global$D.setImmediate;
+	var clear = global$D.clearImmediate;
+	var process$3 = global$D.process;
+	var Dispatch$1 = global$D.Dispatch;
+	var Function$3 = global$D.Function;
+	var MessageChannel = global$D.MessageChannel;
+	var String$2 = global$D.String;
+	var counter = 0;
+	var queue$1 = {};
+	var ONREADYSTATECHANGE = 'onreadystatechange';
+	var location$1, defer, channel, port;
+
+	try {
+	  // Deno throws a ReferenceError on `location` access without `--location` flag
+	  location$1 = global$D.location;
+	} catch (error) { /* empty */ }
+
+	var run = function (id) {
+	  if (hasOwn$8(queue$1, id)) {
+	    var fn = queue$1[id];
+	    delete queue$1[id];
+	    fn();
+	  }
+	};
+
+	var runner = function (id) {
+	  return function () {
+	    run(id);
+	  };
+	};
+
+	var listener = function (event) {
+	  run(event.data);
+	};
+
+	var post = function (id) {
+	  // old engines have not location.origin
+	  global$D.postMessage(String$2(id), location$1.protocol + '//' + location$1.host);
+	};
+
+	// Node.js 0.9+ & IE10+ has setImmediate, otherwise:
+	if (!set$2 || !clear) {
+	  set$2 = function setImmediate(handler) {
+	    validateArgumentsLength$3(arguments.length, 1);
+	    var fn = isCallable$8(handler) ? handler : Function$3(handler);
+	    var args = arraySlice$8(arguments, 1);
+	    queue$1[++counter] = function () {
+	      apply$7(fn, undefined, args);
+	    };
+	    defer(counter);
+	    return counter;
+	  };
+	  clear = function clearImmediate(id) {
+	    delete queue$1[id];
+	  };
+	  // Node.js 0.8-
+	  if (IS_NODE$4) {
+	    defer = function (id) {
+	      process$3.nextTick(runner(id));
+	    };
+	  // Sphere (JS game engine) Dispatch API
+	  } else if (Dispatch$1 && Dispatch$1.now) {
+	    defer = function (id) {
+	      Dispatch$1.now(runner(id));
+	    };
+	  // Browsers with MessageChannel, includes WebWorkers
+	  // except iOS - https://github.com/zloirock/core-js/issues/624
+	  } else if (MessageChannel && !IS_IOS$1) {
+	    channel = new MessageChannel();
+	    port = channel.port2;
+	    channel.port1.onmessage = listener;
+	    defer = bind$c(port.postMessage, port);
+	  // Browsers with postMessage, skip WebWorkers
+	  // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'
+	  } else if (
+	    global$D.addEventListener &&
+	    isCallable$8(global$D.postMessage) &&
+	    !global$D.importScripts &&
+	    location$1 && location$1.protocol !== 'file:' &&
+	    !fails$B(post)
+	  ) {
+	    defer = post;
+	    global$D.addEventListener('message', listener, false);
+	  // IE8-
+	  } else if (ONREADYSTATECHANGE in createElement('script')) {
+	    defer = function (id) {
+	      html.appendChild(createElement('script'))[ONREADYSTATECHANGE] = function () {
+	        html.removeChild(this);
+	        run(id);
+	      };
+	    };
+	  // Rest old browsers
+	  } else {
+	    defer = function (id) {
+	      setTimeout(runner(id), 0);
+	    };
+	  }
 	}
 
-	var $TypeError$8 = GetIntrinsic('%TypeError%');
+	var task$1 = {
+	  set: set$2,
+	  clear: clear
+	};
 
+	var userAgent$5 = engineUserAgent;
+	var global$C = global$1o;
 
+	var engineIsIosPebble = /ipad|iphone|ipod/i.test(userAgent$5) && global$C.Pebble !== undefined;
 
+	var userAgent$4 = engineUserAgent;
 
+	var engineIsWebosWebkit = /web0s(?!.*chrome)/i.test(userAgent$4);
 
+	var global$B = global$1o;
+	var bind$b = functionBindContext;
+	var getOwnPropertyDescriptor$3 = objectGetOwnPropertyDescriptor.f;
+	var macrotask = task$1.set;
+	var IS_IOS = engineIsIos;
+	var IS_IOS_PEBBLE = engineIsIosPebble;
+	var IS_WEBOS_WEBKIT = engineIsWebosWebkit;
+	var IS_NODE$3 = engineIsNode;
 
-	/**
-	 * 7.3.1 Get (O, P) - https://ecma-international.org/ecma-262/6.0/#sec-get-o-p
-	 * 1. Assert: Type(O) is Object.
-	 * 2. Assert: IsPropertyKey(P) is true.
-	 * 3. Return O.[[Get]](P, O).
-	 */
+	var MutationObserver = global$B.MutationObserver || global$B.WebKitMutationObserver;
+	var document$2 = global$B.document;
+	var process$2 = global$B.process;
+	var Promise$1 = global$B.Promise;
+	// Node.js 11 shows ExperimentalWarning on getting `queueMicrotask`
+	var queueMicrotaskDescriptor = getOwnPropertyDescriptor$3(global$B, 'queueMicrotask');
+	var queueMicrotask = queueMicrotaskDescriptor && queueMicrotaskDescriptor.value;
+
+	var flush, head, last, notify$1, toggle, node, promise, then;
+
+	// modern engines have queueMicrotask method
+	if (!queueMicrotask) {
+	  flush = function () {
+	    var parent, fn;
+	    if (IS_NODE$3 && (parent = process$2.domain)) parent.exit();
+	    while (head) {
+	      fn = head.fn;
+	      head = head.next;
+	      try {
+	        fn();
+	      } catch (error) {
+	        if (head) notify$1();
+	        else last = undefined;
+	        throw error;
+	      }
+	    } last = undefined;
+	    if (parent) parent.enter();
+	  };
+
+	  // browsers with MutationObserver, except iOS - https://github.com/zloirock/core-js/issues/339
+	  // also except WebOS Webkit https://github.com/zloirock/core-js/issues/898
+	  if (!IS_IOS && !IS_NODE$3 && !IS_WEBOS_WEBKIT && MutationObserver && document$2) {
+	    toggle = true;
+	    node = document$2.createTextNode('');
+	    new MutationObserver(flush).observe(node, { characterData: true });
+	    notify$1 = function () {
+	      node.data = toggle = !toggle;
+	    };
+	  // environments with maybe non-completely correct, but existent Promise
+	  } else if (!IS_IOS_PEBBLE && Promise$1 && Promise$1.resolve) {
+	    // Promise.resolve without an argument throws an error in LG WebOS 2
+	    promise = Promise$1.resolve(undefined);
+	    // workaround of WebKit ~ iOS Safari 10.1 bug
+	    promise.constructor = Promise$1;
+	    then = bind$b(promise.then, promise);
+	    notify$1 = function () {
+	      then(flush);
+	    };
+	  // Node.js without promises
+	  } else if (IS_NODE$3) {
+	    notify$1 = function () {
+	      process$2.nextTick(flush);
+	    };
+	  // for other environments - macrotask based on:
+	  // - setImmediate
+	  // - MessageChannel
+	  // - window.postMessag
+	  // - onreadystatechange
+	  // - setTimeout
+	  } else {
+	    // strange IE + webpack dev server bug - use .bind(global)
+	    macrotask = bind$b(macrotask, global$B);
+	    notify$1 = function () {
+	      macrotask(flush);
+	    };
+	  }
+	}
+
+	var microtask$1 = queueMicrotask || function (fn) {
+	  var task = { fn: fn, next: undefined };
+	  if (last) last.next = task;
+	  if (!head) {
+	    head = task;
+	    notify$1();
+	  } last = task;
+	};
+
+	var newPromiseCapability$2 = {};
 
-	var Get = function Get(O, P) {
-		// 7.3.1.1
-		if (Type$1(O) !== 'Object') {
-			throw new $TypeError$8('Assertion failed: Type(O) is not Object');
-		}
-		// 7.3.1.2
-		if (!IsPropertyKey(P)) {
-			throw new $TypeError$8('Assertion failed: IsPropertyKey(P) is not true, got ' + objectInspect(P));
-		}
-		// 7.3.1.3
-		return O[P];
+	var aCallable$6 = aCallable$a;
+
+	var PromiseCapability = function (C) {
+	  var resolve, reject;
+	  this.promise = new C(function ($$resolve, $$reject) {
+	    if (resolve !== undefined || reject !== undefined) throw TypeError('Bad Promise constructor');
+	    resolve = $$resolve;
+	    reject = $$reject;
+	  });
+	  this.resolve = aCallable$6(resolve);
+	  this.reject = aCallable$6(reject);
 	};
 
-	var $TypeError$9 = GetIntrinsic('%TypeError%');
-
-	var isPropertyDescriptor = function IsPropertyDescriptor(ES, Desc) {
-		if (ES.Type(Desc) !== 'Object') {
-			return false;
-		}
-		var allowed = {
-			'[[Configurable]]': true,
-			'[[Enumerable]]': true,
-			'[[Get]]': true,
-			'[[Set]]': true,
-			'[[Value]]': true,
-			'[[Writable]]': true
-		};
-
-		for (var key in Desc) { // eslint-disable-line no-restricted-syntax
-			if (src(Desc, key) && !allowed[key]) {
-				return false;
-			}
-		}
-
-		if (ES.IsDataDescriptor(Desc) && ES.IsAccessorDescriptor(Desc)) {
-			throw new $TypeError$9('Property Descriptors may not be both accessor and data descriptors');
-		}
-		return true;
+	// `NewPromiseCapability` abstract operation
+	// https://tc39.es/ecma262/#sec-newpromisecapability
+	newPromiseCapability$2.f = function (C) {
+	  return new PromiseCapability(C);
 	};
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isaccessordescriptor
+	var anObject$a = anObject$n;
+	var isObject$j = isObject$s;
+	var newPromiseCapability$1 = newPromiseCapability$2;
 
-	var IsAccessorDescriptor = function IsAccessorDescriptor(Desc) {
-		if (typeof Desc === 'undefined') {
-			return false;
-		}
+	var promiseResolve$2 = function (C, x) {
+	  anObject$a(C);
+	  if (isObject$j(x) && x.constructor === C) return x;
+	  var promiseCapability = newPromiseCapability$1.f(C);
+	  var resolve = promiseCapability.resolve;
+	  resolve(x);
+	  return promiseCapability.promise;
+	};
+
+	var global$A = global$1o;
 
-		assertRecord(Type$1, 'Property Descriptor', 'Desc', Desc);
+	var hostReportErrors$1 = function (a, b) {
+	  var console = global$A.console;
+	  if (console && console.error) {
+	    arguments.length == 1 ? console.error(a) : console.error(a, b);
+	  }
+	};
 
-		if (!src(Desc, '[[Get]]') && !src(Desc, '[[Set]]')) {
-			return false;
-		}
+	var perform$1 = function (exec) {
+	  try {
+	    return { error: false, value: exec() };
+	  } catch (error) {
+	    return { error: true, value: error };
+	  }
+	};
 
-		return true;
+	var Queue$1 = function () {
+	  this.head = null;
+	  this.tail = null;
 	};
 
-	var $TypeError$a = GetIntrinsic('%TypeError%');
+	Queue$1.prototype = {
+	  add: function (item) {
+	    var entry = { item: item, next: null };
+	    if (this.head) this.tail.next = entry;
+	    else this.head = entry;
+	    this.tail = entry;
+	  },
+	  get: function () {
+	    var entry = this.head;
+	    if (entry) {
+	      this.head = entry.next;
+	      if (this.tail === entry) this.tail = null;
+	      return entry.item;
+	    }
+	  }
+	};
+
+	var queue = Queue$1;
+
+	var engineIsBrowser = typeof window == 'object';
+
+	var $$$ = _export;
+	var global$z = global$1o;
+	var getBuiltIn$3 = getBuiltIn$b;
+	var call$e = functionCall;
+	var NativePromise$1 = nativePromiseConstructor;
+	var redefine$8 = redefine$h.exports;
+	var redefineAll$2 = redefineAll$4;
+	var setPrototypeOf$3 = objectSetPrototypeOf;
+	var setToStringTag$5 = setToStringTag$a;
+	var setSpecies$3 = setSpecies$5;
+	var aCallable$5 = aCallable$a;
+	var isCallable$7 = isCallable$r;
+	var isObject$i = isObject$s;
+	var anInstance$5 = anInstance$7;
+	var inspectSource = inspectSource$4;
+	var iterate$2 = iterate$3;
+	var checkCorrectnessOfIteration$3 = checkCorrectnessOfIteration$4;
+	var speciesConstructor$3 = speciesConstructor$5;
+	var task = task$1.set;
+	var microtask = microtask$1;
+	var promiseResolve$1 = promiseResolve$2;
+	var hostReportErrors = hostReportErrors$1;
+	var newPromiseCapabilityModule = newPromiseCapability$2;
+	var perform = perform$1;
+	var Queue = queue;
+	var InternalStateModule$4 = internalState;
+	var isForced$3 = isForced_1;
+	var wellKnownSymbol$a = wellKnownSymbol$t;
+	var IS_BROWSER = engineIsBrowser;
+	var IS_NODE$2 = engineIsNode;
+	var V8_VERSION$1 = engineV8Version;
+
+	var SPECIES$2 = wellKnownSymbol$a('species');
+	var PROMISE = 'Promise';
+
+	var getInternalState$1 = InternalStateModule$4.getterFor(PROMISE);
+	var setInternalState$4 = InternalStateModule$4.set;
+	var getInternalPromiseState = InternalStateModule$4.getterFor(PROMISE);
+	var NativePromisePrototype = NativePromise$1 && NativePromise$1.prototype;
+	var PromiseConstructor = NativePromise$1;
+	var PromisePrototype = NativePromisePrototype;
+	var TypeError$a = global$z.TypeError;
+	var document$1 = global$z.document;
+	var process$1 = global$z.process;
+	var newPromiseCapability = newPromiseCapabilityModule.f;
+	var newGenericPromiseCapability = newPromiseCapability;
+
+	var DISPATCH_EVENT = !!(document$1 && document$1.createEvent && global$z.dispatchEvent);
+	var NATIVE_REJECTION_EVENT = isCallable$7(global$z.PromiseRejectionEvent);
+	var UNHANDLED_REJECTION = 'unhandledrejection';
+	var REJECTION_HANDLED = 'rejectionhandled';
+	var PENDING = 0;
+	var FULFILLED = 1;
+	var REJECTED = 2;
+	var HANDLED = 1;
+	var UNHANDLED = 2;
+	var SUBCLASSING = false;
+
+	var Internal, OwnPromiseCapability, PromiseWrapper, nativeThen;
+
+	var FORCED$g = isForced$3(PROMISE, function () {
+	  var PROMISE_CONSTRUCTOR_SOURCE = inspectSource(PromiseConstructor);
+	  var GLOBAL_CORE_JS_PROMISE = PROMISE_CONSTRUCTOR_SOURCE !== String(PromiseConstructor);
+	  // V8 6.6 (Node 10 and Chrome 66) have a bug with resolving custom thenables
+	  // https://bugs.chromium.org/p/chromium/issues/detail?id=830565
+	  // We can't detect it synchronously, so just check versions
+	  if (!GLOBAL_CORE_JS_PROMISE && V8_VERSION$1 === 66) return true;
+	  // We can't use @@species feature detection in V8 since it causes
+	  // deoptimization and performance degradation
+	  // https://github.com/zloirock/core-js/issues/679
+	  if (V8_VERSION$1 >= 51 && /native code/.test(PROMISE_CONSTRUCTOR_SOURCE)) return false;
+	  // Detect correctness of subclassing with @@species support
+	  var promise = new PromiseConstructor(function (resolve) { resolve(1); });
+	  var FakePromise = function (exec) {
+	    exec(function () { /* empty */ }, function () { /* empty */ });
+	  };
+	  var constructor = promise.constructor = {};
+	  constructor[SPECIES$2] = FakePromise;
+	  SUBCLASSING = promise.then(function () { /* empty */ }) instanceof FakePromise;
+	  if (!SUBCLASSING) return true;
+	  // Unhandled rejections tracking support, NodeJS Promise without it fails @@species test
+	  return !GLOBAL_CORE_JS_PROMISE && IS_BROWSER && !NATIVE_REJECTION_EVENT;
+	});
 
+	var INCORRECT_ITERATION$1 = FORCED$g || !checkCorrectnessOfIteration$3(function (iterable) {
+	  PromiseConstructor.all(iterable)['catch'](function () { /* empty */ });
+	});
 
+	// helpers
+	var isThenable = function (it) {
+	  var then;
+	  return isObject$i(it) && isCallable$7(then = it.then) ? then : false;
+	};
 
+	var callReaction = function (reaction, state) {
+	  var value = state.value;
+	  var ok = state.state == FULFILLED;
+	  var handler = ok ? reaction.ok : reaction.fail;
+	  var resolve = reaction.resolve;
+	  var reject = reaction.reject;
+	  var domain = reaction.domain;
+	  var result, then, exited;
+	  try {
+	    if (handler) {
+	      if (!ok) {
+	        if (state.rejection === UNHANDLED) onHandleUnhandled(state);
+	        state.rejection = HANDLED;
+	      }
+	      if (handler === true) result = value;
+	      else {
+	        if (domain) domain.enter();
+	        result = handler(value); // can throw
+	        if (domain) {
+	          domain.exit();
+	          exited = true;
+	        }
+	      }
+	      if (result === reaction.promise) {
+	        reject(TypeError$a('Promise-chain cycle'));
+	      } else if (then = isThenable(result)) {
+	        call$e(then, result, resolve, reject);
+	      } else resolve(result);
+	    } else reject(value);
+	  } catch (error) {
+	    if (domain && !exited) domain.exit();
+	    reject(error);
+	  }
+	};
+
+	var notify = function (state, isReject) {
+	  if (state.notified) return;
+	  state.notified = true;
+	  microtask(function () {
+	    var reactions = state.reactions;
+	    var reaction;
+	    while (reaction = reactions.get()) {
+	      callReaction(reaction, state);
+	    }
+	    state.notified = false;
+	    if (isReject && !state.rejection) onUnhandled(state);
+	  });
+	};
 
+	var dispatchEvent$1 = function (name, promise, reason) {
+	  var event, handler;
+	  if (DISPATCH_EVENT) {
+	    event = document$1.createEvent('Event');
+	    event.promise = promise;
+	    event.reason = reason;
+	    event.initEvent(name, false, true);
+	    global$z.dispatchEvent(event);
+	  } else event = { promise: promise, reason: reason };
+	  if (!NATIVE_REJECTION_EVENT && (handler = global$z['on' + name])) handler(event);
+	  else if (name === UNHANDLED_REJECTION) hostReportErrors('Unhandled promise rejection', reason);
+	};
+
+	var onUnhandled = function (state) {
+	  call$e(task, global$z, function () {
+	    var promise = state.facade;
+	    var value = state.value;
+	    var IS_UNHANDLED = isUnhandled(state);
+	    var result;
+	    if (IS_UNHANDLED) {
+	      result = perform(function () {
+	        if (IS_NODE$2) {
+	          process$1.emit('unhandledRejection', value, promise);
+	        } else dispatchEvent$1(UNHANDLED_REJECTION, promise, value);
+	      });
+	      // Browsers should not trigger `rejectionHandled` event if it was handled here, NodeJS - should
+	      state.rejection = IS_NODE$2 || isUnhandled(state) ? UNHANDLED : HANDLED;
+	      if (result.error) throw result.value;
+	    }
+	  });
+	};
 
+	var isUnhandled = function (state) {
+	  return state.rejection !== HANDLED && !state.parent;
+	};
 
+	var onHandleUnhandled = function (state) {
+	  call$e(task, global$z, function () {
+	    var promise = state.facade;
+	    if (IS_NODE$2) {
+	      process$1.emit('rejectionHandled', promise);
+	    } else dispatchEvent$1(REJECTION_HANDLED, promise, state.value);
+	  });
+	};
 
+	var bind$a = function (fn, state, unwrap) {
+	  return function (value) {
+	    fn(state, value, unwrap);
+	  };
+	};
 
+	var internalReject = function (state, value, unwrap) {
+	  if (state.done) return;
+	  state.done = true;
+	  if (unwrap) state = unwrap;
+	  state.value = value;
+	  state.state = REJECTED;
+	  notify(state, true);
+	};
 
+	var internalResolve = function (state, value, unwrap) {
+	  if (state.done) return;
+	  state.done = true;
+	  if (unwrap) state = unwrap;
+	  try {
+	    if (state.facade === value) throw TypeError$a("Promise can't be resolved itself");
+	    var then = isThenable(value);
+	    if (then) {
+	      microtask(function () {
+	        var wrapper = { done: false };
+	        try {
+	          call$e(then, value,
+	            bind$a(internalResolve, wrapper, state),
+	            bind$a(internalReject, wrapper, state)
+	          );
+	        } catch (error) {
+	          internalReject(wrapper, error, state);
+	        }
+	      });
+	    } else {
+	      state.value = value;
+	      state.state = FULFILLED;
+	      notify(state, false);
+	    }
+	  } catch (error) {
+	    internalReject({ done: false }, error, state);
+	  }
+	};
 
+	// constructor polyfill
+	if (FORCED$g) {
+	  // 25.4.3.1 Promise(executor)
+	  PromiseConstructor = function Promise(executor) {
+	    anInstance$5(this, PromisePrototype);
+	    aCallable$5(executor);
+	    call$e(Internal, this);
+	    var state = getInternalState$1(this);
+	    try {
+	      executor(bind$a(internalResolve, state), bind$a(internalReject, state));
+	    } catch (error) {
+	      internalReject(state, error);
+	    }
+	  };
+	  PromisePrototype = PromiseConstructor.prototype;
+	  // eslint-disable-next-line no-unused-vars -- required for `.length`
+	  Internal = function Promise(executor) {
+	    setInternalState$4(this, {
+	      type: PROMISE,
+	      done: false,
+	      notified: false,
+	      parent: false,
+	      reactions: new Queue(),
+	      rejection: false,
+	      state: PENDING,
+	      value: undefined
+	    });
+	  };
+	  Internal.prototype = redefineAll$2(PromisePrototype, {
+	    // `Promise.prototype.then` method
+	    // https://tc39.es/ecma262/#sec-promise.prototype.then
+	    // eslint-disable-next-line unicorn/no-thenable -- safe
+	    then: function then(onFulfilled, onRejected) {
+	      var state = getInternalPromiseState(this);
+	      var reaction = newPromiseCapability(speciesConstructor$3(this, PromiseConstructor));
+	      state.parent = true;
+	      reaction.ok = isCallable$7(onFulfilled) ? onFulfilled : true;
+	      reaction.fail = isCallable$7(onRejected) && onRejected;
+	      reaction.domain = IS_NODE$2 ? process$1.domain : undefined;
+	      if (state.state == PENDING) state.reactions.add(reaction);
+	      else microtask(function () {
+	        callReaction(reaction, state);
+	      });
+	      return reaction.promise;
+	    },
+	    // `Promise.prototype.catch` method
+	    // https://tc39.es/ecma262/#sec-promise.prototype.catch
+	    'catch': function (onRejected) {
+	      return this.then(undefined, onRejected);
+	    }
+	  });
+	  OwnPromiseCapability = function () {
+	    var promise = new Internal();
+	    var state = getInternalState$1(promise);
+	    this.promise = promise;
+	    this.resolve = bind$a(internalResolve, state);
+	    this.reject = bind$a(internalReject, state);
+	  };
+	  newPromiseCapabilityModule.f = newPromiseCapability = function (C) {
+	    return C === PromiseConstructor || C === PromiseWrapper
+	      ? new OwnPromiseCapability(C)
+	      : newGenericPromiseCapability(C);
+	  };
 
+	  if (isCallable$7(NativePromise$1) && NativePromisePrototype !== Object.prototype) {
+	    nativeThen = NativePromisePrototype.then;
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-definepropertyorthrow
+	    if (!SUBCLASSING) {
+	      // make `Promise#then` return a polyfilled `Promise` for native promise-based APIs
+	      redefine$8(NativePromisePrototype, 'then', function then(onFulfilled, onRejected) {
+	        var that = this;
+	        return new PromiseConstructor(function (resolve, reject) {
+	          call$e(nativeThen, that, resolve, reject);
+	        }).then(onFulfilled, onRejected);
+	      // https://github.com/zloirock/core-js/issues/640
+	      }, { unsafe: true });
 
-	var DefinePropertyOrThrow = function DefinePropertyOrThrow(O, P, desc) {
-		if (Type$1(O) !== 'Object') {
-			throw new $TypeError$a('Assertion failed: Type(O) is not Object');
-		}
+	      // makes sure that native promise-based APIs `Promise#catch` properly works with patched `Promise#then`
+	      redefine$8(NativePromisePrototype, 'catch', PromisePrototype['catch'], { unsafe: true });
+	    }
 
-		if (!IsPropertyKey(P)) {
-			throw new $TypeError$a('Assertion failed: IsPropertyKey(P) is not true');
-		}
+	    // make `.constructor === Promise` work for native promise-based APIs
+	    try {
+	      delete NativePromisePrototype.constructor;
+	    } catch (error) { /* empty */ }
 
-		var Desc = isPropertyDescriptor({
-			Type: Type$1,
-			IsDataDescriptor: IsDataDescriptor,
-			IsAccessorDescriptor: IsAccessorDescriptor
-		}, desc) ? desc : ToPropertyDescriptor(desc);
-		if (!isPropertyDescriptor({
-			Type: Type$1,
-			IsDataDescriptor: IsDataDescriptor,
-			IsAccessorDescriptor: IsAccessorDescriptor
-		}, Desc)) {
-			throw new $TypeError$a('Assertion failed: Desc is not a valid Property Descriptor');
-		}
+	    // make `instanceof Promise` work for native promise-based APIs
+	    if (setPrototypeOf$3) {
+	      setPrototypeOf$3(NativePromisePrototype, PromisePrototype);
+	    }
+	  }
+	}
 
-		return DefineOwnProperty(
-			IsDataDescriptor,
-			SameValue,
-			FromPropertyDescriptor,
-			O,
-			P,
-			Desc
-		);
-	};
+	$$$({ global: true, wrap: true, forced: FORCED$g }, {
+	  Promise: PromiseConstructor
+	});
 
-	var IsConstructor = createCommonjsModule(function (module) {
+	setToStringTag$5(PromiseConstructor, PROMISE, false);
+	setSpecies$3(PROMISE);
 
+	PromiseWrapper = getBuiltIn$3(PROMISE);
 
+	// statics
+	$$$({ target: PROMISE, stat: true, forced: FORCED$g }, {
+	  // `Promise.reject` method
+	  // https://tc39.es/ecma262/#sec-promise.reject
+	  reject: function reject(r) {
+	    var capability = newPromiseCapability(this);
+	    call$e(capability.reject, undefined, r);
+	    return capability.promise;
+	  }
+	});
 
-	var $construct = GetIntrinsic('%Reflect.construct%', true);
+	$$$({ target: PROMISE, stat: true, forced: FORCED$g }, {
+	  // `Promise.resolve` method
+	  // https://tc39.es/ecma262/#sec-promise.resolve
+	  resolve: function resolve(x) {
+	    return promiseResolve$1(this, x);
+	  }
+	});
 
-	var DefinePropertyOrThrow$1 = DefinePropertyOrThrow;
-	try {
-		DefinePropertyOrThrow$1({}, '', { '[[Get]]': function () {} });
-	} catch (e) {
-		// Accessor properties aren't supported
-		DefinePropertyOrThrow$1 = null;
-	}
-
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isconstructor
-
-	if (DefinePropertyOrThrow$1 && $construct) {
-		var isConstructorMarker = {};
-		var badArrayLike = {};
-		DefinePropertyOrThrow$1(badArrayLike, 'length', {
-			'[[Get]]': function () {
-				throw isConstructorMarker;
-			},
-			'[[Enumerable]]': true
-		});
-
-		module.exports = function IsConstructor(argument) {
-			try {
-				// `Reflect.construct` invokes `IsConstructor(target)` before `Get(args, 'length')`:
-				$construct(argument, badArrayLike);
-			} catch (err) {
-				return err === isConstructorMarker;
-			}
-		};
-	} else {
-		module.exports = function IsConstructor(argument) {
-			// unfortunately there's no way to truly check this without try/catch `new argument` in old environments
-			return typeof argument === 'function' && !!argument.prototype;
-		};
-	}
+	$$$({ target: PROMISE, stat: true, forced: INCORRECT_ITERATION$1 }, {
+	  // `Promise.all` method
+	  // https://tc39.es/ecma262/#sec-promise.all
+	  all: function all(iterable) {
+	    var C = this;
+	    var capability = newPromiseCapability(C);
+	    var resolve = capability.resolve;
+	    var reject = capability.reject;
+	    var result = perform(function () {
+	      var $promiseResolve = aCallable$5(C.resolve);
+	      var values = [];
+	      var counter = 0;
+	      var remaining = 1;
+	      iterate$2(iterable, function (promise) {
+	        var index = counter++;
+	        var alreadyCalled = false;
+	        remaining++;
+	        call$e($promiseResolve, C, promise).then(function (value) {
+	          if (alreadyCalled) return;
+	          alreadyCalled = true;
+	          values[index] = value;
+	          --remaining || resolve(values);
+	        }, reject);
+	      });
+	      --remaining || resolve(values);
+	    });
+	    if (result.error) reject(result.value);
+	    return capability.promise;
+	  },
+	  // `Promise.race` method
+	  // https://tc39.es/ecma262/#sec-promise.race
+	  race: function race(iterable) {
+	    var C = this;
+	    var capability = newPromiseCapability(C);
+	    var reject = capability.reject;
+	    var result = perform(function () {
+	      var $promiseResolve = aCallable$5(C.resolve);
+	      iterate$2(iterable, function (promise) {
+	        call$e($promiseResolve, C, promise).then(capability.resolve, reject);
+	      });
+	    });
+	    if (result.error) reject(result.value);
+	    return capability.promise;
+	  }
+	});
+
+	var typedArrayConstructor = {exports: {}};
+
+	/* eslint-disable no-new -- required for testing */
+
+	var global$y = global$1o;
+	var fails$A = fails$V;
+	var checkCorrectnessOfIteration$2 = checkCorrectnessOfIteration$4;
+	var NATIVE_ARRAY_BUFFER_VIEWS$1 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
+
+	var ArrayBuffer$2 = global$y.ArrayBuffer;
+	var Int8Array$3 = global$y.Int8Array;
+
+	var typedArrayConstructorsRequireWrappers = !NATIVE_ARRAY_BUFFER_VIEWS$1 || !fails$A(function () {
+	  Int8Array$3(1);
+	}) || !fails$A(function () {
+	  new Int8Array$3(-1);
+	}) || !checkCorrectnessOfIteration$2(function (iterable) {
+	  new Int8Array$3();
+	  new Int8Array$3(null);
+	  new Int8Array$3(1.5);
+	  new Int8Array$3(iterable);
+	}, true) || fails$A(function () {
+	  // Safari (11+) bug - a reason why even Safari 13 should load a typed array polyfill
+	  return new Int8Array$3(new ArrayBuffer$2(2), 1, undefined).length !== 1;
 	});
 
-	var $String = GetIntrinsic('%String%');
-	var $TypeError$b = GetIntrinsic('%TypeError%');
+	var isObject$h = isObject$s;
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-tostring
+	var floor$6 = Math.floor;
 
-	var ToString = function ToString(argument) {
-		if (typeof argument === 'symbol') {
-			throw new $TypeError$b('Cannot convert a Symbol value to a string');
-		}
-		return $String(argument);
+	// `IsIntegralNumber` abstract operation
+	// https://tc39.es/ecma262/#sec-isintegralnumber
+	// eslint-disable-next-line es/no-number-isinteger -- safe
+	var isIntegralNumber$1 = Number.isInteger || function isInteger(it) {
+	  return !isObject$h(it) && isFinite(it) && floor$6(it) === it;
 	};
 
-	var hasToStringTag$3 = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
-	var toStr$9 = Object.prototype.toString;
+	var global$x = global$1o;
+	var toIntegerOrInfinity$5 = toIntegerOrInfinity$b;
 
-	var isStandardArguments = function isArguments(value) {
-		if (hasToStringTag$3 && value && typeof value === 'object' && Symbol.toStringTag in value) {
-			return false;
-		}
-		return toStr$9.call(value) === '[object Arguments]';
-	};
+	var RangeError$9 = global$x.RangeError;
 
-	var isLegacyArguments = function isArguments(value) {
-		if (isStandardArguments(value)) {
-			return true;
-		}
-		return value !== null &&
-			typeof value === 'object' &&
-			typeof value.length === 'number' &&
-			value.length >= 0 &&
-			toStr$9.call(value) !== '[object Array]' &&
-			toStr$9.call(value.callee) === '[object Function]';
+	var toPositiveInteger$1 = function (it) {
+	  var result = toIntegerOrInfinity$5(it);
+	  if (result < 0) throw RangeError$9("The argument can't be less than 0");
+	  return result;
 	};
 
-	var supportsStandardArguments = (function () {
-		return isStandardArguments(arguments);
-	}());
+	var global$w = global$1o;
+	var toPositiveInteger = toPositiveInteger$1;
 
-	isStandardArguments.isLegacyArguments = isLegacyArguments; // for tests
+	var RangeError$8 = global$w.RangeError;
 
-	var isArguments$2 = supportsStandardArguments ? isStandardArguments : isLegacyArguments;
+	var toOffset$2 = function (it, BYTES) {
+	  var offset = toPositiveInteger(it);
+	  if (offset % BYTES) throw RangeError$8('Wrong offset');
+	  return offset;
+	};
 
-	var toString = {}.toString;
+	var bind$9 = functionBindContext;
+	var call$d = functionCall;
+	var aConstructor$1 = aConstructor$3;
+	var toObject$c = toObject$i;
+	var lengthOfArrayLike$c = lengthOfArrayLike$i;
+	var getIterator$2 = getIterator$4;
+	var getIteratorMethod$2 = getIteratorMethod$5;
+	var isArrayIteratorMethod$1 = isArrayIteratorMethod$3;
+	var aTypedArrayConstructor$2 = arrayBufferViewCore.aTypedArrayConstructor;
 
-	var isarray = Array.isArray || function (arr) {
-	  return toString.call(arr) == '[object Array]';
+	var typedArrayFrom$2 = function from(source /* , mapfn, thisArg */) {
+	  var C = aConstructor$1(this);
+	  var O = toObject$c(source);
+	  var argumentsLength = arguments.length;
+	  var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
+	  var mapping = mapfn !== undefined;
+	  var iteratorMethod = getIteratorMethod$2(O);
+	  var i, length, result, step, iterator, next;
+	  if (iteratorMethod && !isArrayIteratorMethod$1(iteratorMethod)) {
+	    iterator = getIterator$2(O, iteratorMethod);
+	    next = iterator.next;
+	    O = [];
+	    while (!(step = call$d(next, iterator)).done) {
+	      O.push(step.value);
+	    }
+	  }
+	  if (mapping && argumentsLength > 2) {
+	    mapfn = bind$9(mapfn, arguments[2]);
+	  }
+	  length = lengthOfArrayLike$c(O);
+	  result = new (aTypedArrayConstructor$2(C))(length);
+	  for (i = 0; length > i; i++) {
+	    result[i] = mapping ? mapfn(O[i], i) : O[i];
+	  }
+	  return result;
 	};
 
-	var strValue = String.prototype.valueOf;
-	var tryStringObject = function tryStringObject(value) {
-		try {
-			strValue.call(value);
-			return true;
-		} catch (e) {
-			return false;
-		}
-	};
-	var toStr$a = Object.prototype.toString;
-	var strClass = '[object String]';
-	var hasToStringTag$4 = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
-
-	var isString$2 = function isString(value) {
-		if (typeof value === 'string') {
-			return true;
-		}
-		if (typeof value !== 'object') {
-			return false;
-		}
-		return hasToStringTag$4 ? tryStringObject(value) : toStr$a.call(value) === strClass;
+	var isCallable$6 = isCallable$r;
+	var isObject$g = isObject$s;
+	var setPrototypeOf$2 = objectSetPrototypeOf;
+
+	// makes subclassing work correct for wrapped built-ins
+	var inheritIfRequired$4 = function ($this, dummy, Wrapper) {
+	  var NewTarget, NewTargetPrototype;
+	  if (
+	    // it can work only with native `setPrototypeOf`
+	    setPrototypeOf$2 &&
+	    // we haven't completely correct pre-ES6 way for getting `new.target`, so use this
+	    isCallable$6(NewTarget = dummy.constructor) &&
+	    NewTarget !== Wrapper &&
+	    isObject$g(NewTargetPrototype = NewTarget.prototype) &&
+	    NewTargetPrototype !== Wrapper.prototype
+	  ) setPrototypeOf$2($this, NewTargetPrototype);
+	  return $this;
+	};
+
+	var $$_ = _export;
+	var global$v = global$1o;
+	var call$c = functionCall;
+	var DESCRIPTORS$c = descriptors;
+	var TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS$1 = typedArrayConstructorsRequireWrappers;
+	var ArrayBufferViewCore$n = arrayBufferViewCore;
+	var ArrayBufferModule = arrayBuffer;
+	var anInstance$4 = anInstance$7;
+	var createPropertyDescriptor$1 = createPropertyDescriptor$7;
+	var createNonEnumerableProperty$2 = createNonEnumerableProperty$b;
+	var isIntegralNumber = isIntegralNumber$1;
+	var toLength$7 = toLength$c;
+	var toIndex = toIndex$2;
+	var toOffset$1 = toOffset$2;
+	var toPropertyKey = toPropertyKey$5;
+	var hasOwn$7 = hasOwnProperty_1;
+	var classof$4 = classof$d;
+	var isObject$f = isObject$s;
+	var isSymbol$2 = isSymbol$6;
+	var create$7 = objectCreate;
+	var isPrototypeOf$3 = objectIsPrototypeOf;
+	var setPrototypeOf$1 = objectSetPrototypeOf;
+	var getOwnPropertyNames$2 = objectGetOwnPropertyNames.f;
+	var typedArrayFrom$1 = typedArrayFrom$2;
+	var forEach$1 = arrayIteration.forEach;
+	var setSpecies$2 = setSpecies$5;
+	var definePropertyModule = objectDefineProperty;
+	var getOwnPropertyDescriptorModule$1 = objectGetOwnPropertyDescriptor;
+	var InternalStateModule$3 = internalState;
+	var inheritIfRequired$3 = inheritIfRequired$4;
+
+	var getInternalState = InternalStateModule$3.get;
+	var setInternalState$3 = InternalStateModule$3.set;
+	var nativeDefineProperty = definePropertyModule.f;
+	var nativeGetOwnPropertyDescriptor$1 = getOwnPropertyDescriptorModule$1.f;
+	var round = Math.round;
+	var RangeError$7 = global$v.RangeError;
+	var ArrayBuffer$1 = ArrayBufferModule.ArrayBuffer;
+	var ArrayBufferPrototype = ArrayBuffer$1.prototype;
+	var DataView$1 = ArrayBufferModule.DataView;
+	var NATIVE_ARRAY_BUFFER_VIEWS = ArrayBufferViewCore$n.NATIVE_ARRAY_BUFFER_VIEWS;
+	var TYPED_ARRAY_CONSTRUCTOR$1 = ArrayBufferViewCore$n.TYPED_ARRAY_CONSTRUCTOR;
+	var TYPED_ARRAY_TAG = ArrayBufferViewCore$n.TYPED_ARRAY_TAG;
+	var TypedArray = ArrayBufferViewCore$n.TypedArray;
+	var TypedArrayPrototype$1 = ArrayBufferViewCore$n.TypedArrayPrototype;
+	var aTypedArrayConstructor$1 = ArrayBufferViewCore$n.aTypedArrayConstructor;
+	var isTypedArray = ArrayBufferViewCore$n.isTypedArray;
+	var BYTES_PER_ELEMENT = 'BYTES_PER_ELEMENT';
+	var WRONG_LENGTH = 'Wrong length';
+
+	var fromList = function (C, list) {
+	  aTypedArrayConstructor$1(C);
+	  var index = 0;
+	  var length = list.length;
+	  var result = new C(length);
+	  while (length > index) result[index] = list[index++];
+	  return result;
 	};
 
-	var $Map = typeof Map === 'function' && Map.prototype ? Map : null;
-	var $Set = typeof Set === 'function' && Set.prototype ? Set : null;
-
-	var exported;
-
-	if (!$Map) {
-		// eslint-disable-next-line no-unused-vars
-		exported = function isMap(x) {
-			// `Map` is not present in this environment.
-			return false;
-		};
-	}
-
-	var $mapHas = $Map ? Map.prototype.has : null;
-	var $setHas = $Set ? Set.prototype.has : null;
-	if (!exported && !$mapHas) {
-		// eslint-disable-next-line no-unused-vars
-		exported = function isMap(x) {
-			// `Map` does not have a `has` method
-			return false;
-		};
-	}
-
-	var isMap$1 = exported || function isMap(x) {
-		if (!x || typeof x !== 'object') {
-			return false;
-		}
-		try {
-			$mapHas.call(x);
-			if ($setHas) {
-				try {
-					$setHas.call(x);
-				} catch (e) {
-					return true;
-				}
-			}
-			return x instanceof $Map; // core-js workaround, pre-v2.5.0
-		} catch (e$1) {}
-		return false;
+	var addGetter = function (it, key) {
+	  nativeDefineProperty(it, key, { get: function () {
+	    return getInternalState(this)[key];
+	  } });
 	};
 
-	var $Map$1 = typeof Map === 'function' && Map.prototype ? Map : null;
-	var $Set$1 = typeof Set === 'function' && Set.prototype ? Set : null;
-
-	var exported$1;
-
-	if (!$Set$1) {
-		// eslint-disable-next-line no-unused-vars
-		exported$1 = function isSet(x) {
-			// `Set` is not present in this environment.
-			return false;
-		};
-	}
-
-	var $mapHas$1 = $Map$1 ? Map.prototype.has : null;
-	var $setHas$1 = $Set$1 ? Set.prototype.has : null;
-	if (!exported$1 && !$setHas$1) {
-		// eslint-disable-next-line no-unused-vars
-		exported$1 = function isSet(x) {
-			// `Set` does not have a `has` method
-			return false;
-		};
-	}
-
-	var isSet$1 = exported$1 || function isSet(x) {
-		if (!x || typeof x !== 'object') {
-			return false;
-		}
-		try {
-			$setHas$1.call(x);
-			if ($mapHas$1) {
-				try {
-					$mapHas$1.call(x);
-				} catch (e) {
-					return true;
-				}
-			}
-			return x instanceof $Set$1; // core-js workaround, pre-v2.5.0
-		} catch (e$1) {}
-		return false;
+	var isArrayBuffer = function (it) {
+	  var klass;
+	  return isPrototypeOf$3(ArrayBufferPrototype, it) || (klass = classof$4(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';
 	};
 
-	var esGetIterator = createCommonjsModule(function (module) {
+	var isTypedArrayIndex = function (target, key) {
+	  return isTypedArray(target)
+	    && !isSymbol$2(key)
+	    && key in target
+	    && isIntegralNumber(+key)
+	    && key >= 0;
+	};
 
-	/* eslint global-require: 0 */
-	// the code is structured this way so that bundlers can
-	// alias out `has-symbols` to `() => true` or `() => false` if your target
-	// environments' Symbol capabilities are known, and then use
-	// dead code elimination on the rest of this module.
-	//
-	// Similarly, `isarray` can be aliased to `Array.isArray` if
-	// available in all target environments.
-
-
-
-	if (hasSymbols$1() || shams()) {
-		var $iterator = Symbol.iterator;
-		// Symbol is available natively or shammed
-		// natively:
-		//  - Chrome >= 38
-		//  - Edge 12-14?, Edge >= 15 for sure
-		//  - FF >= 36
-		//  - Safari >= 9
-		//  - node >= 0.12
-		module.exports = function getIterator(iterable) {
-			// alternatively, `iterable[$iterator]?.()`
-			if (iterable != null && typeof iterable[$iterator] !== 'undefined') {
-				return iterable[$iterator]();
-			}
-			if (isArguments$2(iterable)) {
-				// arguments objects lack Symbol.iterator
-				// - node 0.12
-				return Array.prototype[$iterator].call(iterable);
-			}
-		};
-	} else {
-		// Symbol is not available, native or shammed
-		var isArray = isarray;
-		var isString = isString$2;
-		var GetIntrinsic$1 = GetIntrinsic;
-		var $Map = GetIntrinsic$1('%Map%', true);
-		var $Set = GetIntrinsic$1('%Set%', true);
-		var callBound$1 = callBound;
-		var $arrayPush = callBound$1('Array.prototype.push');
-		var $charCodeAt = callBound$1('String.prototype.charCodeAt');
-		var $stringSlice = callBound$1('String.prototype.slice');
-
-		var advanceStringIndex = function advanceStringIndex(S, index) {
-			var length = S.length;
-			if ((index + 1) >= length) {
-				return index + 1;
-			}
-
-			var first = $charCodeAt(S, index);
-			if (first < 0xD800 || first > 0xDBFF) {
-				return index + 1;
-			}
-
-			var second = $charCodeAt(S, index + 1);
-			if (second < 0xDC00 || second > 0xDFFF) {
-				return index + 1;
-			}
-
-			return index + 2;
-		};
-
-		var getArrayIterator = function getArrayIterator(arraylike) {
-			var i = 0;
-			return {
-				next: function next() {
-					var done = i >= arraylike.length;
-					var value;
-					if (!done) {
-						value = arraylike[i];
-						i += 1;
-					}
-					return {
-						done: done,
-						value: value
-					};
-				}
-			};
-		};
-
-		var getNonCollectionIterator = function getNonCollectionIterator(iterable) {
-			if (isArray(iterable) || isArguments$2(iterable)) {
-				return getArrayIterator(iterable);
-			}
-			if (isString(iterable)) {
-				var i = 0;
-				return {
-					next: function next() {
-						var nextIndex = advanceStringIndex(iterable, i);
-						var value = $stringSlice(iterable, i, nextIndex);
-						i = nextIndex;
-						return {
-							done: nextIndex > iterable.length,
-							value: value
-						};
-					}
-				};
-			}
-		};
-
-		if (!$Map && !$Set) {
-			// the only language iterables are Array, String, arguments
-			// - Safari <= 6.0
-			// - Chrome < 38
-			// - node < 0.12
-			// - FF < 13
-			// - IE < 11
-			// - Edge < 11
-
-			module.exports = getNonCollectionIterator;
-		} else {
-			// either Map or Set are available, but Symbol is not
-			// - es6-shim on an ES5 browser
-			// - Safari 6.2 (maybe 6.1?)
-			// - FF v[13, 36)
-			// - IE 11
-			// - Edge 11
-			// - Safari v[6, 9)
-
-			var isMap = isMap$1;
-			var isSet = isSet$1;
-
-			// Firefox >= 27, IE 11, Safari 6.2 - 9, Edge 11, es6-shim in older envs, all have forEach
-			var $mapForEach = callBound$1('Map.prototype.forEach', true);
-			var $setForEach = callBound$1('Set.prototype.forEach', true);
-			if (typeof process === 'undefined' || !process.versions || !process.versions.node) { // "if is not node"
-
-				// Firefox 17 - 26 has `.iterator()`, whose iterator `.next()` either
-				// returns a value, or throws a StopIteration object. These browsers
-				// do not have any other mechanism for iteration.
-				var $mapIterator = callBound$1('Map.prototype.iterator', true);
-				var $setIterator = callBound$1('Set.prototype.iterator', true);
-				var getStopIterationIterator = function (iterator) {
-					var done = false;
-					return {
-						next: function next() {
-							try {
-								return {
-									done: done,
-									value: done ? undefined : iterator.next()
-								};
-							} catch (e) {
-								done = true;
-								return {
-									done: true,
-									value: undefined
-								};
-							}
-						}
-					};
-				};
-			}
-			// Firefox 27-35, and some older es6-shim versions, use a string "@@iterator" property
-			// this returns a proper iterator object, so we should use it instead of forEach.
-			// newer es6-shim versions use a string "_es6-shim iterator_" property.
-			var $mapAtAtIterator = callBound$1('Map.prototype.@@iterator', true) || callBound$1('Map.prototype._es6-shim iterator_', true);
-			var $setAtAtIterator = callBound$1('Set.prototype.@@iterator', true) || callBound$1('Set.prototype._es6-shim iterator_', true);
-
-			var getCollectionIterator = function getCollectionIterator(iterable) {
-				if (isMap(iterable)) {
-					if ($mapIterator) {
-						return getStopIterationIterator($mapIterator(iterable));
-					}
-					if ($mapAtAtIterator) {
-						return $mapAtAtIterator(iterable);
-					}
-					if ($mapForEach) {
-						var entries = [];
-						$mapForEach(iterable, function (v, k) {
-							$arrayPush(entries, [k, v]);
-						});
-						return getArrayIterator(entries);
-					}
-				}
-				if (isSet(iterable)) {
-					if ($setIterator) {
-						return getStopIterationIterator($setIterator(iterable));
-					}
-					if ($setAtAtIterator) {
-						return $setAtAtIterator(iterable);
-					}
-					if ($setForEach) {
-						var values = [];
-						$setForEach(iterable, function (v) {
-							$arrayPush(values, v);
-						});
-						return getArrayIterator(values);
-					}
-				}
-			};
-
-			module.exports = function getIterator(iterable) {
-				return getCollectionIterator(iterable) || getNonCollectionIterator(iterable);
-			};
-		}
-	}
-	});
+	var wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {
+	  key = toPropertyKey(key);
+	  return isTypedArrayIndex(target, key)
+	    ? createPropertyDescriptor$1(2, target[key])
+	    : nativeGetOwnPropertyDescriptor$1(target, key);
+	};
 
-	var $TypeError$c = TypeError;
-
-	// eslint-disable-next-line consistent-return
-	var iterateIterator = function iterateIterator(iterator) {
-		if (!iterator || typeof iterator.next !== 'function') {
-			throw new $TypeError$c('iterator must be an object with a `next` method');
-		}
-		if (arguments.length > 1) {
-			var callback = arguments[1];
-			if (typeof callback !== 'function') {
-				throw new $TypeError$c('`callback`, if provided, must be a function');
-			}
-		}
-		var values = callback || [];
-		var result;
-		while ((result = iterator.next()) && !result.done) {
-			if (callback) {
-				callback(result.value); // eslint-disable-line callback-return
-			} else {
-				values.push(result.value);
-			}
-		}
-		if (!callback) {
-			return values;
-		}
+	var wrappedDefineProperty = function defineProperty(target, key, descriptor) {
+	  key = toPropertyKey(key);
+	  if (isTypedArrayIndex(target, key)
+	    && isObject$f(descriptor)
+	    && hasOwn$7(descriptor, 'value')
+	    && !hasOwn$7(descriptor, 'get')
+	    && !hasOwn$7(descriptor, 'set')
+	    // TODO: add validation descriptor w/o calling accessors
+	    && !descriptor.configurable
+	    && (!hasOwn$7(descriptor, 'writable') || descriptor.writable)
+	    && (!hasOwn$7(descriptor, 'enumerable') || descriptor.enumerable)
+	  ) {
+	    target[key] = descriptor.value;
+	    return target;
+	  } return nativeDefineProperty(target, key, descriptor);
 	};
 
-	var $TypeError$d = TypeError;
+	if (DESCRIPTORS$c) {
+	  if (!NATIVE_ARRAY_BUFFER_VIEWS) {
+	    getOwnPropertyDescriptorModule$1.f = wrappedGetOwnPropertyDescriptor;
+	    definePropertyModule.f = wrappedDefineProperty;
+	    addGetter(TypedArrayPrototype$1, 'buffer');
+	    addGetter(TypedArrayPrototype$1, 'byteOffset');
+	    addGetter(TypedArrayPrototype$1, 'byteLength');
+	    addGetter(TypedArrayPrototype$1, 'length');
+	  }
 
+	  $$_({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {
+	    getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,
+	    defineProperty: wrappedDefineProperty
+	  });
 
-	var iterateValue = function iterateValue(iterable) {
-		var iterator = esGetIterator(iterable);
-		if (!iterator) {
-			throw new $TypeError$d('non-iterable value provided');
-		}
-		if (arguments.length > 1) {
-			return iterateIterator(iterator, arguments[1]);
-		}
-		return iterateIterator(iterator);
-	};
+	  typedArrayConstructor.exports = function (TYPE, wrapper, CLAMPED) {
+	    var BYTES = TYPE.match(/\d+$/)[0] / 8;
+	    var CONSTRUCTOR_NAME = TYPE + (CLAMPED ? 'Clamped' : '') + 'Array';
+	    var GETTER = 'get' + TYPE;
+	    var SETTER = 'set' + TYPE;
+	    var NativeTypedArrayConstructor = global$v[CONSTRUCTOR_NAME];
+	    var TypedArrayConstructor = NativeTypedArrayConstructor;
+	    var TypedArrayConstructorPrototype = TypedArrayConstructor && TypedArrayConstructor.prototype;
+	    var exported = {};
 
-	var implementation$5 = function from(items) {
-		var C = this;
-		if (items === null || typeof items === 'undefined') {
-			throw new TypeError('`Array.from` requires an array-like object, not `null` or `undefined`');
-		}
-		var mapFn, T;
-		if (typeof arguments[1] !== 'undefined') {
-			mapFn = arguments[1];
-			if (!IsCallable(mapFn)) {
-				throw new TypeError('When provided, the second argument to `Array.from` must be a function');
-			}
-			if (arguments.length > 2) {
-				T = arguments[2];
-			}
-		}
-
-		var values;
-		try {
-			values = iterateValue(items);
-		} catch (e) {
-			values = items;
-		}
-
-		var arrayLike = ToObject(values);
-		var len = ToLength(arrayLike.length);
-		var A = IsConstructor(C) ? ToObject(new C(len)) : new Array(len);
-		var k = 0;
-		var kValue, mappedValue;
-
-		while (k < len) {
-			var Pk = ToString(k);
-			kValue = Get(arrayLike, Pk);
-			if (mapFn) {
-				mappedValue = typeof T === 'undefined' ? mapFn(kValue, k) : Call(mapFn, T, [kValue, k]);
-			} else {
-				mappedValue = kValue;
-			}
-			CreateDataPropertyOrThrow(A, Pk, mappedValue);
-			k += 1;
-		}
-		A.length = len;
-		return A;
-	};
+	    var getter = function (that, index) {
+	      var data = getInternalState(that);
+	      return data.view[GETTER](index * BYTES + data.byteOffset, true);
+	    };
 
-	var tryCall = function (fn) {
-		try {
-			return fn();
-		} catch (e) {
-			return false;
-		}
-	};
+	    var setter = function (that, index, value) {
+	      var data = getInternalState(that);
+	      if (CLAMPED) value = (value = round(value)) < 0 ? 0 : value > 0xFF ? 0xFF : value & 0xFF;
+	      data.view[SETTER](index * BYTES + data.byteOffset, value, true);
+	    };
 
-	var polyfill$8 = function getPolyfill() {
-		if (IsCallable(Array.from)) {
-			var handlesUndefMapper = tryCall(function () {
-				// Microsoft Edge v0.11 throws if the mapFn argument is *provided* but undefined,
-				// but the spec doesn't care if it's provided or not - undefined doesn't throw.
-				return Array.from([0], undefined);
-			});
-			if (!handlesUndefMapper) {
-				var origArrayFrom = Array.from;
-				return function from(items) {
-					/* eslint no-invalid-this: 0 */
-					if (arguments.length > 1 && typeof arguments[1] !== 'undefined') {
-						return Call(origArrayFrom, this, arguments);
-					} else {
-						return Call(origArrayFrom, this, [items]);
-					}
-				};
-			}
-			var implemented = tryCall(function () {
-				// Detects a Firefox bug in v32
-				// https://bugzilla.mozilla.org/show_bug.cgi?id=1063993
-				return Array.from({ 'length': -1 }) === 0;
-			})
-			&& tryCall(function () {
-				// Detects a bug in Webkit nightly r181886
-				var arr = Array.from([0].entries());
-				return arr.length === 1 && IsArray(arr[0]) && arr[0][0] === 0 && arr[0][1] === 0;
-			})
-			&& tryCall(function () {
-				return Array.from({ 'length': -Infinity });
-			});
-			if (implemented) {
-				return Array.from;
-			}
-		}
-
-		return implementation$5;
-	};
+	    var addElement = function (that, index) {
+	      nativeDefineProperty(that, index, {
+	        get: function () {
+	          return getter(this, index);
+	        },
+	        set: function (value) {
+	          return setter(this, index, value);
+	        },
+	        enumerable: true
+	      });
+	    };
 
-	var shim$a = function shimArrayFrom() {
-		var polyfill = polyfill$8();
+	    if (!NATIVE_ARRAY_BUFFER_VIEWS) {
+	      TypedArrayConstructor = wrapper(function (that, data, offset, $length) {
+	        anInstance$4(that, TypedArrayConstructorPrototype);
+	        var index = 0;
+	        var byteOffset = 0;
+	        var buffer, byteLength, length;
+	        if (!isObject$f(data)) {
+	          length = toIndex(data);
+	          byteLength = length * BYTES;
+	          buffer = new ArrayBuffer$1(byteLength);
+	        } else if (isArrayBuffer(data)) {
+	          buffer = data;
+	          byteOffset = toOffset$1(offset, BYTES);
+	          var $len = data.byteLength;
+	          if ($length === undefined) {
+	            if ($len % BYTES) throw RangeError$7(WRONG_LENGTH);
+	            byteLength = $len - byteOffset;
+	            if (byteLength < 0) throw RangeError$7(WRONG_LENGTH);
+	          } else {
+	            byteLength = toLength$7($length) * BYTES;
+	            if (byteLength + byteOffset > $len) throw RangeError$7(WRONG_LENGTH);
+	          }
+	          length = byteLength / BYTES;
+	        } else if (isTypedArray(data)) {
+	          return fromList(TypedArrayConstructor, data);
+	        } else {
+	          return call$c(typedArrayFrom$1, TypedArrayConstructor, data);
+	        }
+	        setInternalState$3(that, {
+	          buffer: buffer,
+	          byteOffset: byteOffset,
+	          byteLength: byteLength,
+	          length: length,
+	          view: new DataView$1(buffer)
+	        });
+	        while (index < length) addElement(that, index++);
+	      });
 
-		defineProperties_1(Array, { 'from': polyfill }, {
-			'from': function () {
-				return Array.from !== polyfill;
-			}
-		});
+	      if (setPrototypeOf$1) setPrototypeOf$1(TypedArrayConstructor, TypedArray);
+	      TypedArrayConstructorPrototype = TypedArrayConstructor.prototype = create$7(TypedArrayPrototype$1);
+	    } else if (TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS$1) {
+	      TypedArrayConstructor = wrapper(function (dummy, data, typedArrayOffset, $length) {
+	        anInstance$4(dummy, TypedArrayConstructorPrototype);
+	        return inheritIfRequired$3(function () {
+	          if (!isObject$f(data)) return new NativeTypedArrayConstructor(toIndex(data));
+	          if (isArrayBuffer(data)) return $length !== undefined
+	            ? new NativeTypedArrayConstructor(data, toOffset$1(typedArrayOffset, BYTES), $length)
+	            : typedArrayOffset !== undefined
+	              ? new NativeTypedArrayConstructor(data, toOffset$1(typedArrayOffset, BYTES))
+	              : new NativeTypedArrayConstructor(data);
+	          if (isTypedArray(data)) return fromList(TypedArrayConstructor, data);
+	          return call$c(typedArrayFrom$1, TypedArrayConstructor, data);
+	        }(), dummy, TypedArrayConstructor);
+	      });
 
-		return polyfill;
-	};
+	      if (setPrototypeOf$1) setPrototypeOf$1(TypedArrayConstructor, TypedArray);
+	      forEach$1(getOwnPropertyNames$2(NativeTypedArrayConstructor), function (key) {
+	        if (!(key in TypedArrayConstructor)) {
+	          createNonEnumerableProperty$2(TypedArrayConstructor, key, NativeTypedArrayConstructor[key]);
+	        }
+	      });
+	      TypedArrayConstructor.prototype = TypedArrayConstructorPrototype;
+	    }
 
-	var polyfill$9 = polyfill$8();
+	    if (TypedArrayConstructorPrototype.constructor !== TypedArrayConstructor) {
+	      createNonEnumerableProperty$2(TypedArrayConstructorPrototype, 'constructor', TypedArrayConstructor);
+	    }
 
-	// eslint-disable-next-line no-unused-vars
-	var boundFromShim = function from(items) {
-		// eslint-disable-next-line no-invalid-this
-		return polyfill$9.apply(this || Array, arguments);
-	};
+	    createNonEnumerableProperty$2(TypedArrayConstructorPrototype, TYPED_ARRAY_CONSTRUCTOR$1, TypedArrayConstructor);
 
-	defineProperties_1(boundFromShim, {
-		'getPolyfill': polyfill$8,
-		'implementation': implementation$5,
-		'shim': shim$a
-	});
+	    if (TYPED_ARRAY_TAG) {
+	      createNonEnumerableProperty$2(TypedArrayConstructorPrototype, TYPED_ARRAY_TAG, CONSTRUCTOR_NAME);
+	    }
 
-	var array_from = boundFromShim;
+	    exported[CONSTRUCTOR_NAME] = TypedArrayConstructor;
 
-	var $isEnumerable$2 = callBound('Object.prototype.propertyIsEnumerable');
+	    $$_({
+	      global: true, forced: TypedArrayConstructor != NativeTypedArrayConstructor, sham: !NATIVE_ARRAY_BUFFER_VIEWS
+	    }, exported);
 
-	var implementation$6 = function values(O) {
-		var obj = RequireObjectCoercible(O);
-		var vals = [];
-		for (var key in obj) {
-			if (src(obj, key) && $isEnumerable$2(obj, key)) {
-				vals.push(obj[key]);
-			}
-		}
-		return vals;
-	};
+	    if (!(BYTES_PER_ELEMENT in TypedArrayConstructor)) {
+	      createNonEnumerableProperty$2(TypedArrayConstructor, BYTES_PER_ELEMENT, BYTES);
+	    }
 
-	var polyfill$a = function getPolyfill() {
-		return typeof Object.values === 'function' ? Object.values : implementation$6;
-	};
+	    if (!(BYTES_PER_ELEMENT in TypedArrayConstructorPrototype)) {
+	      createNonEnumerableProperty$2(TypedArrayConstructorPrototype, BYTES_PER_ELEMENT, BYTES);
+	    }
 
-	var shim$b = function shimValues() {
-		var polyfill = polyfill$a();
-		defineProperties_1(Object, { values: polyfill }, {
-			values: function testValues() {
-				return Object.values !== polyfill;
-			}
-		});
-		return polyfill;
-	};
+	    setSpecies$2(CONSTRUCTOR_NAME);
+	  };
+	} else typedArrayConstructor.exports = function () { /* empty */ };
+
+	var createTypedArrayConstructor$1 = typedArrayConstructor.exports;
 
-	var polyfill$b = polyfill$a();
+	// `Uint8Array` constructor
+	// https://tc39.es/ecma262/#sec-typedarray-objects
+	createTypedArrayConstructor$1('Uint8', function (init) {
+	  return function Uint8Array(data, byteOffset, length) {
+	    return init(this, data, byteOffset, length);
+	  };
+	});
 
-	defineProperties_1(polyfill$b, {
-		getPolyfill: polyfill$a,
-		implementation: implementation$6,
-		shim: shim$b
+	var toObject$b = toObject$i;
+	var toAbsoluteIndex$4 = toAbsoluteIndex$9;
+	var lengthOfArrayLike$b = lengthOfArrayLike$i;
+
+	var min$7 = Math.min;
+
+	// `Array.prototype.copyWithin` method implementation
+	// https://tc39.es/ecma262/#sec-array.prototype.copywithin
+	// eslint-disable-next-line es/no-array-prototype-copywithin -- safe
+	var arrayCopyWithin = [].copyWithin || function copyWithin(target /* = 0 */, start /* = 0, end = @length */) {
+	  var O = toObject$b(this);
+	  var len = lengthOfArrayLike$b(O);
+	  var to = toAbsoluteIndex$4(target, len);
+	  var from = toAbsoluteIndex$4(start, len);
+	  var end = arguments.length > 2 ? arguments[2] : undefined;
+	  var count = min$7((end === undefined ? len : toAbsoluteIndex$4(end, len)) - from, len - to);
+	  var inc = 1;
+	  if (from < to && to < from + count) {
+	    inc = -1;
+	    from += count - 1;
+	    to += count - 1;
+	  }
+	  while (count-- > 0) {
+	    if (from in O) O[to] = O[from];
+	    else delete O[to];
+	    to += inc;
+	    from += inc;
+	  } return O;
+	};
+
+	var uncurryThis$A = functionUncurryThis;
+	var ArrayBufferViewCore$m = arrayBufferViewCore;
+	var $ArrayCopyWithin = arrayCopyWithin;
+
+	var u$ArrayCopyWithin = uncurryThis$A($ArrayCopyWithin);
+	var aTypedArray$l = ArrayBufferViewCore$m.aTypedArray;
+	var exportTypedArrayMethod$m = ArrayBufferViewCore$m.exportTypedArrayMethod;
+
+	// `%TypedArray%.prototype.copyWithin` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.copywithin
+	exportTypedArrayMethod$m('copyWithin', function copyWithin(target, start /* , end */) {
+	  return u$ArrayCopyWithin(aTypedArray$l(this), target, start, arguments.length > 2 ? arguments[2] : undefined);
 	});
 
-	var object_values = polyfill$b;
+	var ArrayBufferViewCore$l = arrayBufferViewCore;
+	var $every$1 = arrayIteration.every;
 
-	// modified from https://github.com/es-shims/es6-shim
+	var aTypedArray$k = ArrayBufferViewCore$l.aTypedArray;
+	var exportTypedArrayMethod$l = ArrayBufferViewCore$l.exportTypedArrayMethod;
 
+	// `%TypedArray%.prototype.every` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.every
+	exportTypedArrayMethod$l('every', function every(callbackfn /* , thisArg */) {
+	  return $every$1(aTypedArray$k(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	var canBeObject = function (obj) {
-		return typeof obj !== 'undefined' && obj !== null;
-	};
-	var hasSymbols$5 = shams();
-	var toObject = Object;
-	var push = functionBind.call(Function.call, Array.prototype.push);
-	var propIsEnumerable = functionBind.call(Function.call, Object.prototype.propertyIsEnumerable);
-	var originalGetSymbols = hasSymbols$5 ? Object.getOwnPropertySymbols : null;
-
-	var implementation$7 = function assign(target, source1) {
-		var arguments$1 = arguments;
-
-		if (!canBeObject(target)) { throw new TypeError('target must be an object'); }
-		var objTarget = toObject(target);
-		var s, source, i, props, syms, value, key;
-		for (s = 1; s < arguments.length; ++s) {
-			source = toObject(arguments$1[s]);
-			props = objectKeys(source);
-			var getSymbols = hasSymbols$5 && (Object.getOwnPropertySymbols || originalGetSymbols);
-			if (getSymbols) {
-				syms = getSymbols(source);
-				for (i = 0; i < syms.length; ++i) {
-					key = syms[i];
-					if (propIsEnumerable(source, key)) {
-						push(props, key);
-					}
-				}
-			}
-			for (i = 0; i < props.length; ++i) {
-				key = props[i];
-				value = source[key];
-				if (propIsEnumerable(source, key)) {
-					objTarget[key] = value;
-				}
-			}
-		}
-		return objTarget;
-	};
+	var ArrayBufferViewCore$k = arrayBufferViewCore;
+	var call$b = functionCall;
+	var $fill = arrayFill$1;
+
+	var aTypedArray$j = ArrayBufferViewCore$k.aTypedArray;
+	var exportTypedArrayMethod$k = ArrayBufferViewCore$k.exportTypedArrayMethod;
+
+	// `%TypedArray%.prototype.fill` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.fill
+	exportTypedArrayMethod$k('fill', function fill(value /* , start, end */) {
+	  var length = arguments.length;
+	  return call$b(
+	    $fill,
+	    aTypedArray$j(this),
+	    value,
+	    length > 1 ? arguments[1] : undefined,
+	    length > 2 ? arguments[2] : undefined
+	  );
+	});
 
-	var lacksProperEnumerationOrder = function () {
-		if (!Object.assign) {
-			return false;
-		}
-		// v8, specifically in node 4.x, has a bug with incorrect property enumeration order
-		// note: this does not detect the bug unless there's 20 characters
-		var str = 'abcdefghijklmnopqrst';
-		var letters = str.split('');
-		var map = {};
-		for (var i = 0; i < letters.length; ++i) {
-			map[letters[i]] = letters[i];
-		}
-		var obj = Object.assign({}, map);
-		var actual = '';
-		for (var k in obj) {
-			actual += k;
-		}
-		return str !== actual;
-	};
+	var lengthOfArrayLike$a = lengthOfArrayLike$i;
 
-	var assignHasPendingExceptions = function () {
-		if (!Object.assign || !Object.preventExtensions) {
-			return false;
-		}
-		// Firefox 37 still has "pending exception" logic in its Object.assign implementation,
-		// which is 72% slower than our shim, and Firefox 40's native implementation.
-		var thrower = Object.preventExtensions({ 1: 2 });
-		try {
-			Object.assign(thrower, 'xy');
-		} catch (e) {
-			return thrower[1] === 'y';
-		}
-		return false;
+	var arrayFromConstructorAndList$1 = function (Constructor, list) {
+	  var index = 0;
+	  var length = lengthOfArrayLike$a(list);
+	  var result = new Constructor(length);
+	  while (length > index) result[index] = list[index++];
+	  return result;
 	};
 
-	var polyfill$c = function getPolyfill() {
-		if (!Object.assign) {
-			return implementation$7;
-		}
-		if (lacksProperEnumerationOrder()) {
-			return implementation$7;
-		}
-		if (assignHasPendingExceptions()) {
-			return implementation$7;
-		}
-		return Object.assign;
+	var ArrayBufferViewCore$j = arrayBufferViewCore;
+	var speciesConstructor$2 = speciesConstructor$5;
+
+	var TYPED_ARRAY_CONSTRUCTOR = ArrayBufferViewCore$j.TYPED_ARRAY_CONSTRUCTOR;
+	var aTypedArrayConstructor = ArrayBufferViewCore$j.aTypedArrayConstructor;
+
+	// a part of `TypedArraySpeciesCreate` abstract operation
+	// https://tc39.es/ecma262/#typedarray-species-create
+	var typedArraySpeciesConstructor$4 = function (originalArray) {
+	  return aTypedArrayConstructor(speciesConstructor$2(originalArray, originalArray[TYPED_ARRAY_CONSTRUCTOR]));
 	};
 
-	var shim$c = function shimAssign() {
-		var polyfill = polyfill$c();
-		defineProperties_1(
-			Object,
-			{ assign: polyfill },
-			{ assign: function () { return Object.assign !== polyfill; } }
-		);
-		return polyfill;
+	var arrayFromConstructorAndList = arrayFromConstructorAndList$1;
+	var typedArraySpeciesConstructor$3 = typedArraySpeciesConstructor$4;
+
+	var typedArrayFromSpeciesAndList = function (instance, list) {
+	  return arrayFromConstructorAndList(typedArraySpeciesConstructor$3(instance), list);
 	};
 
-	var polyfill$d = polyfill$c();
+	var ArrayBufferViewCore$i = arrayBufferViewCore;
+	var $filter$1 = arrayIteration.filter;
+	var fromSpeciesAndList = typedArrayFromSpeciesAndList;
+
+	var aTypedArray$i = ArrayBufferViewCore$i.aTypedArray;
+	var exportTypedArrayMethod$j = ArrayBufferViewCore$i.exportTypedArrayMethod;
 
-	defineProperties_1(polyfill$d, {
-		getPolyfill: polyfill$c,
-		implementation: implementation$7,
-		shim: shim$c
+	// `%TypedArray%.prototype.filter` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.filter
+	exportTypedArrayMethod$j('filter', function filter(callbackfn /* , thisArg */) {
+	  var list = $filter$1(aTypedArray$i(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  return fromSpeciesAndList(this, list);
 	});
 
-	var object_assign = polyfill$d;
+	var ArrayBufferViewCore$h = arrayBufferViewCore;
+	var $find$1 = arrayIteration.find;
 
-	/**
-	 * @this {Promise}
-	 */
-	function finallyConstructor(callback) {
-	  var constructor = this.constructor;
-	  return this.then(
-	    function(value) {
-	      // @ts-ignore
-	      return constructor.resolve(callback()).then(function() {
-	        return value;
-	      });
-	    },
-	    function(reason) {
-	      // @ts-ignore
-	      return constructor.resolve(callback()).then(function() {
-	        // @ts-ignore
-	        return constructor.reject(reason);
-	      });
-	    }
-	  );
-	}
+	var aTypedArray$h = ArrayBufferViewCore$h.aTypedArray;
+	var exportTypedArrayMethod$i = ArrayBufferViewCore$h.exportTypedArrayMethod;
 
-	// Store setTimeout reference so promise-polyfill will be unaffected by
-	// other code modifying setTimeout (like sinon.useFakeTimers())
-	var setTimeoutFunc = setTimeout;
+	// `%TypedArray%.prototype.find` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.find
+	exportTypedArrayMethod$i('find', function find(predicate /* , thisArg */) {
+	  return $find$1(aTypedArray$h(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	function isArray$4(x) {
-	  return Boolean(x && typeof x.length !== 'undefined');
-	}
+	var ArrayBufferViewCore$g = arrayBufferViewCore;
+	var $findIndex$1 = arrayIteration.findIndex;
 
-	function noop$1() {}
+	var aTypedArray$g = ArrayBufferViewCore$g.aTypedArray;
+	var exportTypedArrayMethod$h = ArrayBufferViewCore$g.exportTypedArrayMethod;
 
-	// Polyfill for Function.prototype.bind
-	function bind$2(fn, thisArg) {
-	  return function() {
-	    fn.apply(thisArg, arguments);
-	  };
-	}
+	// `%TypedArray%.prototype.findIndex` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.findindex
+	exportTypedArrayMethod$h('findIndex', function findIndex(predicate /* , thisArg */) {
+	  return $findIndex$1(aTypedArray$g(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	/**
-	 * @constructor
-	 * @param {Function} fn
-	 */
-	function Promise$1(fn) {
-	  if (!(this instanceof Promise$1))
-	    { throw new TypeError('Promises must be constructed via new'); }
-	  if (typeof fn !== 'function') { throw new TypeError('not a function'); }
-	  /** @type {!number} */
-	  this._state = 0;
-	  /** @type {!boolean} */
-	  this._handled = false;
-	  /** @type {Promise|undefined} */
-	  this._value = undefined;
-	  /** @type {!Array<!Function>} */
-	  this._deferreds = [];
-
-	  doResolve(fn, this);
-	}
-
-	function handle(self, deferred) {
-	  while (self._state === 3) {
-	    self = self._value;
-	  }
-	  if (self._state === 0) {
-	    self._deferreds.push(deferred);
-	    return;
-	  }
-	  self._handled = true;
-	  Promise$1._immediateFn(function() {
-	    var cb = self._state === 1 ? deferred.onFulfilled : deferred.onRejected;
-	    if (cb === null) {
-	      (self._state === 1 ? resolve : reject)(deferred.promise, self._value);
-	      return;
-	    }
-	    var ret;
-	    try {
-	      ret = cb(self._value);
-	    } catch (e) {
-	      reject(deferred.promise, e);
-	      return;
-	    }
-	    resolve(deferred.promise, ret);
-	  });
-	}
+	var ArrayBufferViewCore$f = arrayBufferViewCore;
+	var $forEach = arrayIteration.forEach;
 
-	function resolve(self, newValue) {
-	  try {
-	    // Promise Resolution Procedure: https://github.com/promises-aplus/promises-spec#the-promise-resolution-procedure
-	    if (newValue === self)
-	      { throw new TypeError('A promise cannot be resolved with itself.'); }
-	    if (
-	      newValue &&
-	      (typeof newValue === 'object' || typeof newValue === 'function')
-	    ) {
-	      var then = newValue.then;
-	      if (newValue instanceof Promise$1) {
-	        self._state = 3;
-	        self._value = newValue;
-	        finale(self);
-	        return;
-	      } else if (typeof then === 'function') {
-	        doResolve(bind$2(then, newValue), self);
-	        return;
-	      }
-	    }
-	    self._state = 1;
-	    self._value = newValue;
-	    finale(self);
-	  } catch (e) {
-	    reject(self, e);
-	  }
-	}
+	var aTypedArray$f = ArrayBufferViewCore$f.aTypedArray;
+	var exportTypedArrayMethod$g = ArrayBufferViewCore$f.exportTypedArrayMethod;
 
-	function reject(self, newValue) {
-	  self._state = 2;
-	  self._value = newValue;
-	  finale(self);
-	}
+	// `%TypedArray%.prototype.forEach` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.foreach
+	exportTypedArrayMethod$g('forEach', function forEach(callbackfn /* , thisArg */) {
+	  $forEach(aTypedArray$f(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	function finale(self) {
-	  if (self._state === 2 && self._deferreds.length === 0) {
-	    Promise$1._immediateFn(function() {
-	      if (!self._handled) {
-	        Promise$1._unhandledRejectionFn(self._value);
-	      }
-	    });
-	  }
+	var ArrayBufferViewCore$e = arrayBufferViewCore;
+	var $includes$1 = arrayIncludes.includes;
 
-	  for (var i = 0, len = self._deferreds.length; i < len; i++) {
-	    handle(self, self._deferreds[i]);
-	  }
-	  self._deferreds = null;
-	}
+	var aTypedArray$e = ArrayBufferViewCore$e.aTypedArray;
+	var exportTypedArrayMethod$f = ArrayBufferViewCore$e.exportTypedArrayMethod;
 
-	/**
-	 * @constructor
-	 */
-	function Handler(onFulfilled, onRejected, promise) {
-	  this.onFulfilled = typeof onFulfilled === 'function' ? onFulfilled : null;
-	  this.onRejected = typeof onRejected === 'function' ? onRejected : null;
-	  this.promise = promise;
-	}
+	// `%TypedArray%.prototype.includes` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.includes
+	exportTypedArrayMethod$f('includes', function includes(searchElement /* , fromIndex */) {
+	  return $includes$1(aTypedArray$e(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	/**
-	 * Take a potentially misbehaving resolver function and make sure
-	 * onFulfilled and onRejected are only called once.
-	 *
-	 * Makes no guarantees about asynchrony.
-	 */
-	function doResolve(fn, self) {
-	  var done = false;
-	  try {
-	    fn(
-	      function(value) {
-	        if (done) { return; }
-	        done = true;
-	        resolve(self, value);
-	      },
-	      function(reason) {
-	        if (done) { return; }
-	        done = true;
-	        reject(self, reason);
-	      }
-	    );
-	  } catch (ex) {
-	    if (done) { return; }
-	    done = true;
-	    reject(self, ex);
-	  }
-	}
+	var ArrayBufferViewCore$d = arrayBufferViewCore;
+	var $indexOf = arrayIncludes.indexOf;
 
-	Promise$1.prototype['catch'] = function(onRejected) {
-	  return this.then(null, onRejected);
-	};
+	var aTypedArray$d = ArrayBufferViewCore$d.aTypedArray;
+	var exportTypedArrayMethod$e = ArrayBufferViewCore$d.exportTypedArrayMethod;
 
-	Promise$1.prototype.then = function(onFulfilled, onRejected) {
-	  // @ts-ignore
-	  var prom = new this.constructor(noop$1);
+	// `%TypedArray%.prototype.indexOf` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.indexof
+	exportTypedArrayMethod$e('indexOf', function indexOf(searchElement /* , fromIndex */) {
+	  return $indexOf(aTypedArray$d(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	  handle(this, new Handler(onFulfilled, onRejected, prom));
-	  return prom;
-	};
+	var global$u = global$1o;
+	var fails$z = fails$V;
+	var uncurryThis$z = functionUncurryThis;
+	var ArrayBufferViewCore$c = arrayBufferViewCore;
+	var ArrayIterators = es_array_iterator;
+	var wellKnownSymbol$9 = wellKnownSymbol$t;
+
+	var ITERATOR$4 = wellKnownSymbol$9('iterator');
+	var Uint8Array$2 = global$u.Uint8Array;
+	var arrayValues = uncurryThis$z(ArrayIterators.values);
+	var arrayKeys = uncurryThis$z(ArrayIterators.keys);
+	var arrayEntries = uncurryThis$z(ArrayIterators.entries);
+	var aTypedArray$c = ArrayBufferViewCore$c.aTypedArray;
+	var exportTypedArrayMethod$d = ArrayBufferViewCore$c.exportTypedArrayMethod;
+	var TypedArrayPrototype = Uint8Array$2 && Uint8Array$2.prototype;
+
+	var GENERIC = !fails$z(function () {
+	  TypedArrayPrototype[ITERATOR$4].call([1]);
+	});
 
-	Promise$1.prototype['finally'] = finallyConstructor;
+	var ITERATOR_IS_VALUES = !!TypedArrayPrototype
+	  && TypedArrayPrototype.values
+	  && TypedArrayPrototype[ITERATOR$4] === TypedArrayPrototype.values
+	  && TypedArrayPrototype.values.name === 'values';
+
+	var typedArrayValues = function values() {
+	  return arrayValues(aTypedArray$c(this));
+	};
+
+	// `%TypedArray%.prototype.entries` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.entries
+	exportTypedArrayMethod$d('entries', function entries() {
+	  return arrayEntries(aTypedArray$c(this));
+	}, GENERIC);
+	// `%TypedArray%.prototype.keys` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.keys
+	exportTypedArrayMethod$d('keys', function keys() {
+	  return arrayKeys(aTypedArray$c(this));
+	}, GENERIC);
+	// `%TypedArray%.prototype.values` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.values
+	exportTypedArrayMethod$d('values', typedArrayValues, GENERIC || !ITERATOR_IS_VALUES, { name: 'values' });
+	// `%TypedArray%.prototype[@@iterator]` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype-@@iterator
+	exportTypedArrayMethod$d(ITERATOR$4, typedArrayValues, GENERIC || !ITERATOR_IS_VALUES, { name: 'values' });
+
+	var ArrayBufferViewCore$b = arrayBufferViewCore;
+	var uncurryThis$y = functionUncurryThis;
+
+	var aTypedArray$b = ArrayBufferViewCore$b.aTypedArray;
+	var exportTypedArrayMethod$c = ArrayBufferViewCore$b.exportTypedArrayMethod;
+	var $join = uncurryThis$y([].join);
+
+	// `%TypedArray%.prototype.join` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.join
+	exportTypedArrayMethod$c('join', function join(separator) {
+	  return $join(aTypedArray$b(this), separator);
+	});
 
-	Promise$1.all = function(arr) {
-	  return new Promise$1(function(resolve, reject) {
-	    if (!isArray$4(arr)) {
-	      return reject(new TypeError('Promise.all accepts an array'));
-	    }
+	/* eslint-disable es/no-array-prototype-lastindexof -- safe */
+	var apply$6 = functionApply;
+	var toIndexedObject$5 = toIndexedObject$d;
+	var toIntegerOrInfinity$4 = toIntegerOrInfinity$b;
+	var lengthOfArrayLike$9 = lengthOfArrayLike$i;
+	var arrayMethodIsStrict$6 = arrayMethodIsStrict$9;
+
+	var min$6 = Math.min;
+	var $lastIndexOf$1 = [].lastIndexOf;
+	var NEGATIVE_ZERO = !!$lastIndexOf$1 && 1 / [1].lastIndexOf(1, -0) < 0;
+	var STRICT_METHOD$6 = arrayMethodIsStrict$6('lastIndexOf');
+	var FORCED$f = NEGATIVE_ZERO || !STRICT_METHOD$6;
+
+	// `Array.prototype.lastIndexOf` method implementation
+	// https://tc39.es/ecma262/#sec-array.prototype.lastindexof
+	var arrayLastIndexOf = FORCED$f ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {
+	  // convert -0 to +0
+	  if (NEGATIVE_ZERO) return apply$6($lastIndexOf$1, this, arguments) || 0;
+	  var O = toIndexedObject$5(this);
+	  var length = lengthOfArrayLike$9(O);
+	  var index = length - 1;
+	  if (arguments.length > 1) index = min$6(index, toIntegerOrInfinity$4(arguments[1]));
+	  if (index < 0) index = length + index;
+	  for (;index >= 0; index--) if (index in O && O[index] === searchElement) return index || 0;
+	  return -1;
+	} : $lastIndexOf$1;
 
-	    var args = Array.prototype.slice.call(arr);
-	    if (args.length === 0) { return resolve([]); }
-	    var remaining = args.length;
+	var ArrayBufferViewCore$a = arrayBufferViewCore;
+	var apply$5 = functionApply;
+	var $lastIndexOf = arrayLastIndexOf;
 
-	    function res(i, val) {
-	      try {
-	        if (val && (typeof val === 'object' || typeof val === 'function')) {
-	          var then = val.then;
-	          if (typeof then === 'function') {
-	            then.call(
-	              val,
-	              function(val) {
-	                res(i, val);
-	              },
-	              reject
-	            );
-	            return;
-	          }
-	        }
-	        args[i] = val;
-	        if (--remaining === 0) {
-	          resolve(args);
-	        }
-	      } catch (ex) {
-	        reject(ex);
-	      }
-	    }
+	var aTypedArray$a = ArrayBufferViewCore$a.aTypedArray;
+	var exportTypedArrayMethod$b = ArrayBufferViewCore$a.exportTypedArrayMethod;
 
-	    for (var i = 0; i < args.length; i++) {
-	      res(i, args[i]);
-	    }
-	  });
-	};
+	// `%TypedArray%.prototype.lastIndexOf` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.lastindexof
+	exportTypedArrayMethod$b('lastIndexOf', function lastIndexOf(searchElement /* , fromIndex */) {
+	  var length = arguments.length;
+	  return apply$5($lastIndexOf, aTypedArray$a(this), length > 1 ? [searchElement, arguments[1]] : [searchElement]);
+	});
 
-	Promise$1.resolve = function(value) {
-	  if (value && typeof value === 'object' && value.constructor === Promise$1) {
-	    return value;
-	  }
+	var ArrayBufferViewCore$9 = arrayBufferViewCore;
+	var $map = arrayIteration.map;
+	var typedArraySpeciesConstructor$2 = typedArraySpeciesConstructor$4;
 
-	  return new Promise$1(function(resolve) {
-	    resolve(value);
-	  });
-	};
+	var aTypedArray$9 = ArrayBufferViewCore$9.aTypedArray;
+	var exportTypedArrayMethod$a = ArrayBufferViewCore$9.exportTypedArrayMethod;
 
-	Promise$1.reject = function(value) {
-	  return new Promise$1(function(resolve, reject) {
-	    reject(value);
+	// `%TypedArray%.prototype.map` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.map
+	exportTypedArrayMethod$a('map', function map(mapfn /* , thisArg */) {
+	  return $map(aTypedArray$9(this), mapfn, arguments.length > 1 ? arguments[1] : undefined, function (O, length) {
+	    return new (typedArraySpeciesConstructor$2(O))(length);
 	  });
-	};
+	});
 
-	Promise$1.race = function(arr) {
-	  return new Promise$1(function(resolve, reject) {
-	    if (!isArray$4(arr)) {
-	      return reject(new TypeError('Promise.race accepts an array'));
+	var global$t = global$1o;
+	var aCallable$4 = aCallable$a;
+	var toObject$a = toObject$i;
+	var IndexedObject$2 = indexedObject;
+	var lengthOfArrayLike$8 = lengthOfArrayLike$i;
+
+	var TypeError$9 = global$t.TypeError;
+
+	// `Array.prototype.{ reduce, reduceRight }` methods implementation
+	var createMethod$3 = function (IS_RIGHT) {
+	  return function (that, callbackfn, argumentsLength, memo) {
+	    aCallable$4(callbackfn);
+	    var O = toObject$a(that);
+	    var self = IndexedObject$2(O);
+	    var length = lengthOfArrayLike$8(O);
+	    var index = IS_RIGHT ? length - 1 : 0;
+	    var i = IS_RIGHT ? -1 : 1;
+	    if (argumentsLength < 2) while (true) {
+	      if (index in self) {
+	        memo = self[index];
+	        index += i;
+	        break;
+	      }
+	      index += i;
+	      if (IS_RIGHT ? index < 0 : length <= index) {
+	        throw TypeError$9('Reduce of empty array with no initial value');
+	      }
 	    }
-
-	    for (var i = 0, len = arr.length; i < len; i++) {
-	      Promise$1.resolve(arr[i]).then(resolve, reject);
+	    for (;IS_RIGHT ? index >= 0 : length > index; index += i) if (index in self) {
+	      memo = callbackfn(memo, self[index], index, O);
 	    }
-	  });
-	};
-
-	// Use polyfill for setImmediate for performance gains
-	Promise$1._immediateFn =
-	  // @ts-ignore
-	  (typeof setImmediate === 'function' &&
-	    function(fn) {
-	      // @ts-ignore
-	      setImmediate(fn);
-	    }) ||
-	  function(fn) {
-	    setTimeoutFunc(fn, 0);
+	    return memo;
 	  };
+	};
 
-	Promise$1._unhandledRejectionFn = function _unhandledRejectionFn(err) {
-	  if (typeof console !== 'undefined' && console) {
-	    console.warn('Possible Unhandled Promise Rejection:', err); // eslint-disable-line no-console
-	  }
+	var arrayReduce = {
+	  // `Array.prototype.reduce` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.reduce
+	  left: createMethod$3(false),
+	  // `Array.prototype.reduceRight` method
+	  // https://tc39.es/ecma262/#sec-array.prototype.reduceright
+	  right: createMethod$3(true)
 	};
 
-	/** @suppress {undefinedVars} */
-	var globalNS = (function() {
-	  // the only reliable means to get the global object is
-	  // `Function('return this')()`
-	  // However, this causes CSP violations in Chrome apps.
-	  if (typeof self !== 'undefined') {
-	    return self;
-	  }
-	  if (typeof window !== 'undefined') {
-	    return window;
-	  }
-	  if (typeof global !== 'undefined') {
-	    return global;
-	  }
-	  throw new Error('unable to locate global object');
-	})();
+	var ArrayBufferViewCore$8 = arrayBufferViewCore;
+	var $reduce$1 = arrayReduce.left;
 
-	if (!('Promise' in globalNS)) {
-	  globalNS['Promise'] = Promise$1;
-	} else if (!globalNS.Promise.prototype['finally']) {
-	  globalNS.Promise.prototype['finally'] = finallyConstructor;
-	}
+	var aTypedArray$8 = ArrayBufferViewCore$8.aTypedArray;
+	var exportTypedArrayMethod$9 = ArrayBufferViewCore$8.exportTypedArrayMethod;
 
-	var polyfill$e = /*#__PURE__*/Object.freeze({
-		__proto__: null
+	// `%TypedArray%.prototype.reduce` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.reduce
+	exportTypedArrayMethod$9('reduce', function reduce(callbackfn /* , initialValue */) {
+	  var length = arguments.length;
+	  return $reduce$1(aTypedArray$8(this), callbackfn, length, length > 1 ? arguments[1] : undefined);
 	});
 
-	var setAsap = createCommonjsModule(function (module) {
-	(function (thisVar, undefined$1) {
-		var main = (typeof window === 'object' && window) || (typeof commonjsGlobal === 'object' && commonjsGlobal) ||
-			typeof self === 'object' && self || thisVar;
-
-		var hasSetImmediate = typeof setImmediate === 'function';
-		var hasNextTick = typeof process === 'object' && !!process && typeof process.nextTick === 'function';
-		var index = 0;
-
-		function getNewIndex() {
-			if (index === 9007199254740991) {
-				return 0;
-			}
-			return ++index;
-		}
-
-		var setAsap = (function () {
-			var hiddenDiv, scriptEl, timeoutFn, callbacks;
-
-			// Modern browsers, fastest async
-			if (main.MutationObserver) {
-				return function setAsap(callback) {
-					hiddenDiv = document.createElement("div");
-					(new MutationObserver(function() {
-						callback();
-						hiddenDiv = null;
-					})).observe(hiddenDiv, { attributes: true });
-					hiddenDiv.setAttribute('i', '1');
-				};
-
-			// Browsers that support postMessage
-			} else if (!hasSetImmediate && main.postMessage && !main.importScripts && main.addEventListener) {
-
-				var MESSAGE_PREFIX = "com.setImmediate" + Math.random();
-				callbacks = {};
-
-				var onGlobalMessage = function (event) {
-					if (event.source === main && event.data.indexOf(MESSAGE_PREFIX) === 0) {
-						var i = +event.data.split(':')[1];
-						callbacks[i]();
-						delete callbacks[i];
-					}
-				};
-
-				main.addEventListener("message", onGlobalMessage, false);
-
-				return function setAsap(callback) {
-					var i = getNewIndex();
-					callbacks[i] = callback;
-					main.postMessage(MESSAGE_PREFIX + ':' + i, "*");
-				};
-
-				// IE browsers without postMessage
-			} else if (!hasSetImmediate && main.document && 'onreadystatechange' in document.createElement('script')) {
-
-				return function setAsap(callback) {
-					scriptEl = document.createElement("script");
-					scriptEl.onreadystatechange = function onreadystatechange() {
-						scriptEl.onreadystatechange = null;
-						scriptEl.parentNode.removeChild(scriptEl);
-						scriptEl = null;
-						callback();
-					};
-					document.body.appendChild(scriptEl);
-				};
-
-			// All other browsers and node
-			} else {
-
-				timeoutFn = (hasSetImmediate && setImmediate) || (hasNextTick && process.nextTick) || setTimeout;
-				return function setAsap(callback) {
-					timeoutFn(callback);
-				};
-			}
-
-		})();
-
-		if ( module.exports) {
-			module.exports = setAsap;
-		} else if (typeof commonjsRequire !== 'undefined' && commonjsRequire.amd) {
-			undefined$1(function () {
-				return setAsap;
-			});
-		} else {
-			main.setAsap = setAsap;
-		}
-	})(commonjsGlobal);
+	var ArrayBufferViewCore$7 = arrayBufferViewCore;
+	var $reduceRight$1 = arrayReduce.right;
+
+	var aTypedArray$7 = ArrayBufferViewCore$7.aTypedArray;
+	var exportTypedArrayMethod$8 = ArrayBufferViewCore$7.exportTypedArrayMethod;
+
+	// `%TypedArray%.prototype.reduceRicht` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.reduceright
+	exportTypedArrayMethod$8('reduceRight', function reduceRight(callbackfn /* , initialValue */) {
+	  var length = arguments.length;
+	  return $reduceRight$1(aTypedArray$7(this), callbackfn, length, length > 1 ? arguments[1] : undefined);
 	});
 
-	var performanceNow = createCommonjsModule(function (module) {
-	// Generated by CoffeeScript 1.12.2
-	(function() {
-	  var getNanoSeconds, hrtime, loadTime, moduleLoadTime, nodeLoadTime, upTime;
+	var ArrayBufferViewCore$6 = arrayBufferViewCore;
 
-	  if ((typeof performance !== "undefined" && performance !== null) && performance.now) {
-	    module.exports = function() {
-	      return performance.now();
-	    };
-	  } else if ((typeof process !== "undefined" && process !== null) && process.hrtime) {
-	    module.exports = function() {
-	      return (getNanoSeconds() - nodeLoadTime) / 1e6;
-	    };
-	    hrtime = process.hrtime;
-	    getNanoSeconds = function() {
-	      var hr;
-	      hr = hrtime();
-	      return hr[0] * 1e9 + hr[1];
-	    };
-	    moduleLoadTime = getNanoSeconds();
-	    upTime = process.uptime() * 1e9;
-	    nodeLoadTime = moduleLoadTime - upTime;
-	  } else if (Date.now) {
-	    module.exports = function() {
-	      return Date.now() - loadTime;
-	    };
-	    loadTime = Date.now();
-	  } else {
-	    module.exports = function() {
-	      return new Date().getTime() - loadTime;
-	    };
-	    loadTime = new Date().getTime();
-	  }
+	var aTypedArray$6 = ArrayBufferViewCore$6.aTypedArray;
+	var exportTypedArrayMethod$7 = ArrayBufferViewCore$6.exportTypedArrayMethod;
+	var floor$5 = Math.floor;
 
-	}).call(commonjsGlobal);
+	// `%TypedArray%.prototype.reverse` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.reverse
+	exportTypedArrayMethod$7('reverse', function reverse() {
+	  var that = this;
+	  var length = aTypedArray$6(that).length;
+	  var middle = floor$5(length / 2);
+	  var index = 0;
+	  var value;
+	  while (index < middle) {
+	    value = that[index];
+	    that[index++] = that[--length];
+	    that[length] = value;
+	  } return that;
+	});
 
+	var global$s = global$1o;
+	var call$a = functionCall;
+	var ArrayBufferViewCore$5 = arrayBufferViewCore;
+	var lengthOfArrayLike$7 = lengthOfArrayLike$i;
+	var toOffset = toOffset$2;
+	var toIndexedObject$4 = toObject$i;
+	var fails$y = fails$V;
+
+	var RangeError$6 = global$s.RangeError;
+	var Int8Array$2 = global$s.Int8Array;
+	var Int8ArrayPrototype = Int8Array$2 && Int8Array$2.prototype;
+	var $set = Int8ArrayPrototype && Int8ArrayPrototype.set;
+	var aTypedArray$5 = ArrayBufferViewCore$5.aTypedArray;
+	var exportTypedArrayMethod$6 = ArrayBufferViewCore$5.exportTypedArrayMethod;
+
+	var WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS = !fails$y(function () {
+	  // eslint-disable-next-line es/no-typed-arrays -- required for testing
+	  var array = new Uint8ClampedArray(2);
+	  call$a($set, array, { length: 1, 0: 3 }, 1);
+	  return array[1] !== 3;
+	});
 
+	// https://bugs.chromium.org/p/v8/issues/detail?id=11294 and other
+	var TO_OBJECT_BUG = WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS && ArrayBufferViewCore$5.NATIVE_ARRAY_BUFFER_VIEWS && fails$y(function () {
+	  var array = new Int8Array$2(2);
+	  array.set(1);
+	  array.set('2', 1);
+	  return array[0] !== 0 || array[1] !== 2;
 	});
 
-	var root = typeof window === 'undefined' ? commonjsGlobal : window
-	  , vendors = ['moz', 'webkit']
-	  , suffix = 'AnimationFrame'
-	  , raf = root['request' + suffix]
-	  , caf = root['cancel' + suffix] || root['cancelRequest' + suffix];
-
-	for(var i = 0; !raf && i < vendors.length; i++) {
-	  raf = root[vendors[i] + 'Request' + suffix];
-	  caf = root[vendors[i] + 'Cancel' + suffix]
-	      || root[vendors[i] + 'CancelRequest' + suffix];
-	}
-
-	// Some versions of FF have rAF but not cAF
-	if(!raf || !caf) {
-	  var last = 0
-	    , id$2 = 0
-	    , queue = []
-	    , frameDuration = 1000 / 60;
-
-	  raf = function(callback) {
-	    if(queue.length === 0) {
-	      var _now = performanceNow()
-	        , next = Math.max(0, frameDuration - (_now - last));
-	      last = next + _now;
-	      setTimeout(function() {
-	        var cp = queue.slice(0);
-	        // Clear queue here to prevent
-	        // callbacks from appending listeners
-	        // to the current frame's queue
-	        queue.length = 0;
-	        for(var i = 0; i < cp.length; i++) {
-	          if(!cp[i].cancelled) {
-	            try{
-	              cp[i].callback(last);
-	            } catch(e) {
-	              setTimeout(function() { throw e }, 0);
-	            }
-	          }
-	        }
-	      }, Math.round(next));
-	    }
-	    queue.push({
-	      handle: ++id$2,
-	      callback: callback,
-	      cancelled: false
-	    });
-	    return id$2
-	  };
+	// `%TypedArray%.prototype.set` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.set
+	exportTypedArrayMethod$6('set', function set(arrayLike /* , offset */) {
+	  aTypedArray$5(this);
+	  var offset = toOffset(arguments.length > 1 ? arguments[1] : undefined, 1);
+	  var src = toIndexedObject$4(arrayLike);
+	  if (WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS) return call$a($set, this, src, offset);
+	  var length = this.length;
+	  var len = lengthOfArrayLike$7(src);
+	  var index = 0;
+	  if (len + offset > length) throw RangeError$6('Wrong length');
+	  while (index < len) this[offset + index] = src[index++];
+	}, !WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS || TO_OBJECT_BUG);
 
-	  caf = function(handle) {
-	    for(var i = 0; i < queue.length; i++) {
-	      if(queue[i].handle === handle) {
-	        queue[i].cancelled = true;
-	      }
-	    }
-	  };
-	}
+	var ArrayBufferViewCore$4 = arrayBufferViewCore;
+	var typedArraySpeciesConstructor$1 = typedArraySpeciesConstructor$4;
+	var fails$x = fails$V;
+	var arraySlice$7 = arraySlice$b;
 
-	var raf_1 = function(fn) {
-	  // Wrap in a new function to prevent
-	  // `cancel` potentially being assigned
-	  // to the native rAF function
-	  return raf.call(root, fn)
-	};
-	var cancel = function() {
-	  caf.apply(root, arguments);
+	var aTypedArray$4 = ArrayBufferViewCore$4.aTypedArray;
+	var exportTypedArrayMethod$5 = ArrayBufferViewCore$4.exportTypedArrayMethod;
+
+	var FORCED$e = fails$x(function () {
+	  // eslint-disable-next-line es/no-typed-arrays -- required for testing
+	  new Int8Array(1).slice();
+	});
+
+	// `%TypedArray%.prototype.slice` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.slice
+	exportTypedArrayMethod$5('slice', function slice(start, end) {
+	  var list = arraySlice$7(aTypedArray$4(this), start, end);
+	  var C = typedArraySpeciesConstructor$1(this);
+	  var index = 0;
+	  var length = list.length;
+	  var result = new C(length);
+	  while (length > index) result[index] = list[index++];
+	  return result;
+	}, FORCED$e);
+
+	var ArrayBufferViewCore$3 = arrayBufferViewCore;
+	var $some$1 = arrayIteration.some;
+
+	var aTypedArray$3 = ArrayBufferViewCore$3.aTypedArray;
+	var exportTypedArrayMethod$4 = ArrayBufferViewCore$3.exportTypedArrayMethod;
+
+	// `%TypedArray%.prototype.some` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.some
+	exportTypedArrayMethod$4('some', function some(callbackfn /* , thisArg */) {
+	  return $some$1(aTypedArray$3(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	});
+
+	var arraySlice$6 = arraySliceSimple;
+
+	var floor$4 = Math.floor;
+
+	var mergeSort = function (array, comparefn) {
+	  var length = array.length;
+	  var middle = floor$4(length / 2);
+	  return length < 8 ? insertionSort(array, comparefn) : merge$5(
+	    array,
+	    mergeSort(arraySlice$6(array, 0, middle), comparefn),
+	    mergeSort(arraySlice$6(array, middle), comparefn),
+	    comparefn
+	  );
 	};
-	var polyfill$f = function(object) {
-	  if (!object) {
-	    object = root;
-	  }
-	  object.requestAnimationFrame = raf;
-	  object.cancelAnimationFrame = caf;
+
+	var insertionSort = function (array, comparefn) {
+	  var length = array.length;
+	  var i = 1;
+	  var element, j;
+
+	  while (i < length) {
+	    j = i;
+	    element = array[i];
+	    while (j && comparefn(array[j - 1], element) > 0) {
+	      array[j] = array[--j];
+	    }
+	    if (j !== i++) array[j] = element;
+	  } return array;
 	};
-	raf_1.cancel = cancel;
-	raf_1.polyfill = polyfill$f;
 
-	var global$1 = (function(self) {
-	  return self
-	  // eslint-disable-next-line no-invalid-this
-	})(typeof self !== 'undefined' ? self : undefined);
-	var support = {
-	  searchParams: 'URLSearchParams' in global$1,
-	  iterable: 'Symbol' in global$1 && 'iterator' in Symbol,
-	  blob:
-	    'FileReader' in global$1 &&
-	    'Blob' in global$1 &&
-	    (function() {
-	      try {
-	        new Blob();
-	        return true
-	      } catch (e) {
-	        return false
-	      }
-	    })(),
-	  formData: 'FormData' in global$1,
-	  arrayBuffer: 'ArrayBuffer' in global$1
+	var merge$5 = function (array, left, right, comparefn) {
+	  var llength = left.length;
+	  var rlength = right.length;
+	  var lindex = 0;
+	  var rindex = 0;
+
+	  while (lindex < llength || rindex < rlength) {
+	    array[lindex + rindex] = (lindex < llength && rindex < rlength)
+	      ? comparefn(left[lindex], right[rindex]) <= 0 ? left[lindex++] : right[rindex++]
+	      : lindex < llength ? left[lindex++] : right[rindex++];
+	  } return array;
 	};
 
-	function isDataView(obj) {
-	  return obj && DataView.prototype.isPrototypeOf(obj)
-	}
+	var arraySort$1 = mergeSort;
 
-	if (support.arrayBuffer) {
-	  var viewClasses = [
-	    '[object Int8Array]',
-	    '[object Uint8Array]',
-	    '[object Uint8ClampedArray]',
-	    '[object Int16Array]',
-	    '[object Uint16Array]',
-	    '[object Int32Array]',
-	    '[object Uint32Array]',
-	    '[object Float32Array]',
-	    '[object Float64Array]'
-	  ];
+	var userAgent$3 = engineUserAgent;
 
-	  var isArrayBufferView =
-	    ArrayBuffer.isView ||
-	    function(obj) {
-	      return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1
-	    };
-	}
+	var firefox = userAgent$3.match(/firefox\/(\d+)/i);
 
-	function normalizeName(name) {
-	  if (typeof name !== 'string') {
-	    name = String(name);
-	  }
-	  if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
-	    throw new TypeError('Invalid character in header field name')
-	  }
-	  return name.toLowerCase()
-	}
+	var engineFfVersion = !!firefox && +firefox[1];
 
-	function normalizeValue(value) {
-	  if (typeof value !== 'string') {
-	    value = String(value);
+	var UA = engineUserAgent;
+
+	var engineIsIeOrEdge = /MSIE|Trident/.test(UA);
+
+	var userAgent$2 = engineUserAgent;
+
+	var webkit = userAgent$2.match(/AppleWebKit\/(\d+)\./);
+
+	var engineWebkitVersion = !!webkit && +webkit[1];
+
+	var global$r = global$1o;
+	var uncurryThis$x = functionUncurryThis;
+	var fails$w = fails$V;
+	var aCallable$3 = aCallable$a;
+	var internalSort$1 = arraySort$1;
+	var ArrayBufferViewCore$2 = arrayBufferViewCore;
+	var FF$1 = engineFfVersion;
+	var IE_OR_EDGE$1 = engineIsIeOrEdge;
+	var V8$1 = engineV8Version;
+	var WEBKIT$1 = engineWebkitVersion;
+
+	var Array$3 = global$r.Array;
+	var aTypedArray$2 = ArrayBufferViewCore$2.aTypedArray;
+	var exportTypedArrayMethod$3 = ArrayBufferViewCore$2.exportTypedArrayMethod;
+	var Uint16Array = global$r.Uint16Array;
+	var un$Sort$1 = Uint16Array && uncurryThis$x(Uint16Array.prototype.sort);
+
+	// WebKit
+	var ACCEPT_INCORRECT_ARGUMENTS = !!un$Sort$1 && !(fails$w(function () {
+	  un$Sort$1(new Uint16Array(2), null);
+	}) && fails$w(function () {
+	  un$Sort$1(new Uint16Array(2), {});
+	}));
+
+	var STABLE_SORT$1 = !!un$Sort$1 && !fails$w(function () {
+	  // feature detection can be too slow, so check engines versions
+	  if (V8$1) return V8$1 < 74;
+	  if (FF$1) return FF$1 < 67;
+	  if (IE_OR_EDGE$1) return true;
+	  if (WEBKIT$1) return WEBKIT$1 < 602;
+
+	  var array = new Uint16Array(516);
+	  var expected = Array$3(516);
+	  var index, mod;
+
+	  for (index = 0; index < 516; index++) {
+	    mod = index % 4;
+	    array[index] = 515 - index;
+	    expected[index] = index - 2 * mod + 3;
 	  }
-	  return value
-	}
 
-	// Build a destructive iterator for the value list
-	function iteratorFor(items) {
-	  var iterator = {
-	    next: function() {
-	      var value = items.shift();
-	      return {done: value === undefined, value: value}
-	    }
-	  };
+	  un$Sort$1(array, function (a, b) {
+	    return (a / 4 | 0) - (b / 4 | 0);
+	  });
 
-	  if (support.iterable) {
-	    iterator[Symbol.iterator] = function() {
-	      return iterator
-	    };
+	  for (index = 0; index < 516; index++) {
+	    if (array[index] !== expected[index]) return true;
 	  }
+	});
+
+	var getSortCompare$1 = function (comparefn) {
+	  return function (x, y) {
+	    if (comparefn !== undefined) return +comparefn(x, y) || 0;
+	    // eslint-disable-next-line no-self-compare -- NaN check
+	    if (y !== y) return -1;
+	    // eslint-disable-next-line no-self-compare -- NaN check
+	    if (x !== x) return 1;
+	    if (x === 0 && y === 0) return 1 / x > 0 && 1 / y < 0 ? 1 : -1;
+	    return x > y;
+	  };
+	};
+
+	// `%TypedArray%.prototype.sort` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.sort
+	exportTypedArrayMethod$3('sort', function sort(comparefn) {
+	  if (comparefn !== undefined) aCallable$3(comparefn);
+	  if (STABLE_SORT$1) return un$Sort$1(this, comparefn);
+
+	  return internalSort$1(aTypedArray$2(this), getSortCompare$1(comparefn));
+	}, !STABLE_SORT$1 || ACCEPT_INCORRECT_ARGUMENTS);
+
+	var ArrayBufferViewCore$1 = arrayBufferViewCore;
+	var toLength$6 = toLength$c;
+	var toAbsoluteIndex$3 = toAbsoluteIndex$9;
+	var typedArraySpeciesConstructor = typedArraySpeciesConstructor$4;
+
+	var aTypedArray$1 = ArrayBufferViewCore$1.aTypedArray;
+	var exportTypedArrayMethod$2 = ArrayBufferViewCore$1.exportTypedArrayMethod;
+
+	// `%TypedArray%.prototype.subarray` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.subarray
+	exportTypedArrayMethod$2('subarray', function subarray(begin, end) {
+	  var O = aTypedArray$1(this);
+	  var length = O.length;
+	  var beginIndex = toAbsoluteIndex$3(begin, length);
+	  var C = typedArraySpeciesConstructor(O);
+	  return new C(
+	    O.buffer,
+	    O.byteOffset + beginIndex * O.BYTES_PER_ELEMENT,
+	    toLength$6((end === undefined ? length : toAbsoluteIndex$3(end, length)) - beginIndex)
+	  );
+	});
+
+	var global$q = global$1o;
+	var apply$4 = functionApply;
+	var ArrayBufferViewCore = arrayBufferViewCore;
+	var fails$v = fails$V;
+	var arraySlice$5 = arraySlice$b;
+
+	var Int8Array$1 = global$q.Int8Array;
+	var aTypedArray = ArrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$1 = ArrayBufferViewCore.exportTypedArrayMethod;
+	var $toLocaleString = [].toLocaleString;
+
+	// iOS Safari 6.x fails here
+	var TO_LOCALE_STRING_BUG = !!Int8Array$1 && fails$v(function () {
+	  $toLocaleString.call(new Int8Array$1(1));
+	});
 
-	  return iterator
+	var FORCED$d = fails$v(function () {
+	  return [1, 2].toLocaleString() != new Int8Array$1([1, 2]).toLocaleString();
+	}) || !fails$v(function () {
+	  Int8Array$1.prototype.toLocaleString.call([1, 2]);
+	});
+
+	// `%TypedArray%.prototype.toLocaleString` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.tolocalestring
+	exportTypedArrayMethod$1('toLocaleString', function toLocaleString() {
+	  return apply$4(
+	    $toLocaleString,
+	    TO_LOCALE_STRING_BUG ? arraySlice$5(aTypedArray(this)) : aTypedArray(this),
+	    arraySlice$5(arguments)
+	  );
+	}, FORCED$d);
+
+	var exportTypedArrayMethod = arrayBufferViewCore.exportTypedArrayMethod;
+	var fails$u = fails$V;
+	var global$p = global$1o;
+	var uncurryThis$w = functionUncurryThis;
+
+	var Uint8Array$1 = global$p.Uint8Array;
+	var Uint8ArrayPrototype = Uint8Array$1 && Uint8Array$1.prototype || {};
+	var arrayToString = [].toString;
+	var join$5 = uncurryThis$w([].join);
+
+	if (fails$u(function () { arrayToString.call({}); })) {
+	  arrayToString = function toString() {
+	    return join$5(this);
+	  };
 	}
 
-	function Headers(headers) {
-	  this.map = {};
+	var IS_NOT_ARRAY_METHOD = Uint8ArrayPrototype.toString != arrayToString;
 
-	  if (headers instanceof Headers) {
-	    headers.forEach(function(value, name) {
-	      this.append(name, value);
-	    }, this);
-	  } else if (Array.isArray(headers)) {
-	    headers.forEach(function(header) {
-	      this.append(header[0], header[1]);
-	    }, this);
-	  } else if (headers) {
-	    Object.getOwnPropertyNames(headers).forEach(function(name) {
-	      this.append(name, headers[name]);
-	    }, this);
+	// `%TypedArray%.prototype.toString` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.prototype.tostring
+	exportTypedArrayMethod('toString', arrayToString, IS_NOT_ARRAY_METHOD);
+
+	var $$Z = _export;
+	var uncurryThis$v = functionUncurryThis;
+	var IndexedObject$1 = indexedObject;
+	var toIndexedObject$3 = toIndexedObject$d;
+	var arrayMethodIsStrict$5 = arrayMethodIsStrict$9;
+
+	var un$Join = uncurryThis$v([].join);
+
+	var ES3_STRINGS = IndexedObject$1 != Object;
+	var STRICT_METHOD$5 = arrayMethodIsStrict$5('join', ',');
+
+	// `Array.prototype.join` method
+	// https://tc39.es/ecma262/#sec-array.prototype.join
+	$$Z({ target: 'Array', proto: true, forced: ES3_STRINGS || !STRICT_METHOD$5 }, {
+	  join: function join(separator) {
+	    return un$Join(toIndexedObject$3(this), separator === undefined ? ',' : separator);
 	  }
-	}
+	});
 
-	Headers.prototype.append = function(name, value) {
-	  name = normalizeName(name);
-	  value = normalizeValue(value);
-	  var oldValue = this.map[name];
-	  this.map[name] = oldValue ? oldValue + ', ' + value : value;
-	};
+	var $$Y = _export;
+	var global$o = global$1o;
+	var isArray$4 = isArray$8;
+	var isConstructor$1 = isConstructor$4;
+	var isObject$e = isObject$s;
+	var toAbsoluteIndex$2 = toAbsoluteIndex$9;
+	var lengthOfArrayLike$6 = lengthOfArrayLike$i;
+	var toIndexedObject$2 = toIndexedObject$d;
+	var createProperty$3 = createProperty$5;
+	var wellKnownSymbol$8 = wellKnownSymbol$t;
+	var arrayMethodHasSpeciesSupport$3 = arrayMethodHasSpeciesSupport$5;
+	var un$Slice = arraySlice$b;
+
+	var HAS_SPECIES_SUPPORT$2 = arrayMethodHasSpeciesSupport$3('slice');
+
+	var SPECIES$1 = wellKnownSymbol$8('species');
+	var Array$2 = global$o.Array;
+	var max$3 = Math.max;
+
+	// `Array.prototype.slice` method
+	// https://tc39.es/ecma262/#sec-array.prototype.slice
+	// fallback for not array-like ES3 strings and DOM objects
+	$$Y({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$2 }, {
+	  slice: function slice(start, end) {
+	    var O = toIndexedObject$2(this);
+	    var length = lengthOfArrayLike$6(O);
+	    var k = toAbsoluteIndex$2(start, length);
+	    var fin = toAbsoluteIndex$2(end === undefined ? length : end, length);
+	    // inline `ArraySpeciesCreate` for usage native `Array#slice` where it's possible
+	    var Constructor, result, n;
+	    if (isArray$4(O)) {
+	      Constructor = O.constructor;
+	      // cross-realm fallback
+	      if (isConstructor$1(Constructor) && (Constructor === Array$2 || isArray$4(Constructor.prototype))) {
+	        Constructor = undefined;
+	      } else if (isObject$e(Constructor)) {
+	        Constructor = Constructor[SPECIES$1];
+	        if (Constructor === null) Constructor = undefined;
+	      }
+	      if (Constructor === Array$2 || Constructor === undefined) {
+	        return un$Slice(O, k, fin);
+	      }
+	    }
+	    result = new (Constructor === undefined ? Array$2 : Constructor)(max$3(fin - k, 0));
+	    for (n = 0; k < fin; k++, n++) if (k in O) createProperty$3(result, n, O[k]);
+	    result.length = n;
+	    return result;
+	  }
+	});
 
-	Headers.prototype['delete'] = function(name) {
-	  delete this.map[normalizeName(name)];
-	};
+	var fails$t = fails$V;
+	var wellKnownSymbol$7 = wellKnownSymbol$t;
+	var IS_PURE = isPure;
+
+	var ITERATOR$3 = wellKnownSymbol$7('iterator');
+
+	var nativeUrl = !fails$t(function () {
+	  // eslint-disable-next-line unicorn/relative-url-style -- required for testing
+	  var url = new URL('b?a=1&b=2&c=3', 'http://a');
+	  var searchParams = url.searchParams;
+	  var result = '';
+	  url.pathname = 'c%20d';
+	  searchParams.forEach(function (value, key) {
+	    searchParams['delete']('b');
+	    result += key + value;
+	  });
+	  return (IS_PURE && !url.toJSON)
+	    || !searchParams.sort
+	    || url.href !== 'http://a/c%20d?a=1&c=3'
+	    || searchParams.get('c') !== '3'
+	    || String(new URLSearchParams('?a=1')) !== 'a=1'
+	    || !searchParams[ITERATOR$3]
+	    // throws in Edge
+	    || new URL('https://a@b').username !== 'a'
+	    || new URLSearchParams(new URLSearchParams('a=b')).get('a') !== 'b'
+	    // not punycoded in Edge
+	    || new URL('http://тест').host !== 'xn--e1aybc'
+	    // not escaped in Chrome 62-
+	    || new URL('http://a#б').hash !== '#%D0%B1'
+	    // fails in Chrome 66-
+	    || result !== 'a1c3'
+	    // throws in Safari
+	    || new URL('http://x', undefined).host !== 'x';
+	});
 
-	Headers.prototype.get = function(name) {
-	  name = normalizeName(name);
-	  return this.has(name) ? this.map[name] : null
+	// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
+
+	var $$X = _export;
+	var global$n = global$1o;
+	var getBuiltIn$2 = getBuiltIn$b;
+	var call$9 = functionCall;
+	var uncurryThis$u = functionUncurryThis;
+	var USE_NATIVE_URL$1 = nativeUrl;
+	var redefine$7 = redefine$h.exports;
+	var redefineAll$1 = redefineAll$4;
+	var setToStringTag$4 = setToStringTag$a;
+	var createIteratorConstructor = createIteratorConstructor$2;
+	var InternalStateModule$2 = internalState;
+	var anInstance$3 = anInstance$7;
+	var isCallable$5 = isCallable$r;
+	var hasOwn$6 = hasOwnProperty_1;
+	var bind$8 = functionBindContext;
+	var classof$3 = classof$d;
+	var anObject$9 = anObject$n;
+	var isObject$d = isObject$s;
+	var $toString$2 = toString$k;
+	var create$6 = objectCreate;
+	var createPropertyDescriptor = createPropertyDescriptor$7;
+	var getIterator$1 = getIterator$4;
+	var getIteratorMethod$1 = getIteratorMethod$5;
+	var validateArgumentsLength$2 = validateArgumentsLength$4;
+	var wellKnownSymbol$6 = wellKnownSymbol$t;
+	var arraySort = arraySort$1;
+
+	var ITERATOR$2 = wellKnownSymbol$6('iterator');
+	var URL_SEARCH_PARAMS = 'URLSearchParams';
+	var URL_SEARCH_PARAMS_ITERATOR = URL_SEARCH_PARAMS + 'Iterator';
+	var setInternalState$2 = InternalStateModule$2.set;
+	var getInternalParamsState = InternalStateModule$2.getterFor(URL_SEARCH_PARAMS);
+	var getInternalIteratorState = InternalStateModule$2.getterFor(URL_SEARCH_PARAMS_ITERATOR);
+
+	var n$Fetch = getBuiltIn$2('fetch');
+	var N$Request = getBuiltIn$2('Request');
+	var Headers$1 = getBuiltIn$2('Headers');
+	var RequestPrototype = N$Request && N$Request.prototype;
+	var HeadersPrototype = Headers$1 && Headers$1.prototype;
+	var RegExp$1 = global$n.RegExp;
+	var TypeError$8 = global$n.TypeError;
+	var decodeURIComponent$1 = global$n.decodeURIComponent;
+	var encodeURIComponent$1 = global$n.encodeURIComponent;
+	var charAt$5 = uncurryThis$u(''.charAt);
+	var join$4 = uncurryThis$u([].join);
+	var push$7 = uncurryThis$u([].push);
+	var replace$6 = uncurryThis$u(''.replace);
+	var shift$1 = uncurryThis$u([].shift);
+	var splice = uncurryThis$u([].splice);
+	var split$3 = uncurryThis$u(''.split);
+	var stringSlice$8 = uncurryThis$u(''.slice);
+
+	var plus = /\+/g;
+	var sequences = Array(4);
+
+	var percentSequence = function (bytes) {
+	  return sequences[bytes - 1] || (sequences[bytes - 1] = RegExp$1('((?:%[\\da-f]{2}){' + bytes + '})', 'gi'));
+	};
+
+	var percentDecode = function (sequence) {
+	  try {
+	    return decodeURIComponent$1(sequence);
+	  } catch (error) {
+	    return sequence;
+	  }
 	};
 
-	Headers.prototype.has = function(name) {
-	  return this.map.hasOwnProperty(normalizeName(name))
+	var deserialize = function (it) {
+	  var result = replace$6(it, plus, ' ');
+	  var bytes = 4;
+	  try {
+	    return decodeURIComponent$1(result);
+	  } catch (error) {
+	    while (bytes) {
+	      result = replace$6(result, percentSequence(bytes--), percentDecode);
+	    }
+	    return result;
+	  }
 	};
 
-	Headers.prototype.set = function(name, value) {
-	  this.map[normalizeName(name)] = normalizeValue(value);
+	var find$1 = /[!'()~]|%20/g;
+
+	var replacements = {
+	  '!': '%21',
+	  "'": '%27',
+	  '(': '%28',
+	  ')': '%29',
+	  '~': '%7E',
+	  '%20': '+'
 	};
 
-	Headers.prototype.forEach = function(callback, thisArg) {
-	  for (var name in this.map) {
-	    if (this.map.hasOwnProperty(name)) {
-	      callback.call(thisArg, this.map[name], name, this);
-	    }
-	  }
+	var replacer = function (match) {
+	  return replacements[match];
 	};
 
-	Headers.prototype.keys = function() {
-	  var items = [];
-	  this.forEach(function(value, name) {
-	    items.push(name);
-	  });
-	  return iteratorFor(items)
+	var serialize = function (it) {
+	  return replace$6(encodeURIComponent$1(it), find$1, replacer);
 	};
 
-	Headers.prototype.values = function() {
-	  var items = [];
-	  this.forEach(function(value) {
-	    items.push(value);
+	var URLSearchParamsIterator = createIteratorConstructor(function Iterator(params, kind) {
+	  setInternalState$2(this, {
+	    type: URL_SEARCH_PARAMS_ITERATOR,
+	    iterator: getIterator$1(getInternalParamsState(params).entries),
+	    kind: kind
 	  });
-	  return iteratorFor(items)
+	}, 'Iterator', function next() {
+	  var state = getInternalIteratorState(this);
+	  var kind = state.kind;
+	  var step = state.iterator.next();
+	  var entry = step.value;
+	  if (!step.done) {
+	    step.value = kind === 'keys' ? entry.key : kind === 'values' ? entry.value : [entry.key, entry.value];
+	  } return step;
+	}, true);
+
+	var URLSearchParamsState = function (init) {
+	  this.entries = [];
+	  this.url = null;
+
+	  if (init !== undefined) {
+	    if (isObject$d(init)) this.parseObject(init);
+	    else this.parseQuery(typeof init == 'string' ? charAt$5(init, 0) === '?' ? stringSlice$8(init, 1) : init : $toString$2(init));
+	  }
+	};
+
+	URLSearchParamsState.prototype = {
+	  type: URL_SEARCH_PARAMS,
+	  bindURL: function (url) {
+	    this.url = url;
+	    this.update();
+	  },
+	  parseObject: function (object) {
+	    var iteratorMethod = getIteratorMethod$1(object);
+	    var iterator, next, step, entryIterator, entryNext, first, second;
+
+	    if (iteratorMethod) {
+	      iterator = getIterator$1(object, iteratorMethod);
+	      next = iterator.next;
+	      while (!(step = call$9(next, iterator)).done) {
+	        entryIterator = getIterator$1(anObject$9(step.value));
+	        entryNext = entryIterator.next;
+	        if (
+	          (first = call$9(entryNext, entryIterator)).done ||
+	          (second = call$9(entryNext, entryIterator)).done ||
+	          !call$9(entryNext, entryIterator).done
+	        ) throw TypeError$8('Expected sequence with length 2');
+	        push$7(this.entries, { key: $toString$2(first.value), value: $toString$2(second.value) });
+	      }
+	    } else for (var key in object) if (hasOwn$6(object, key)) {
+	      push$7(this.entries, { key: key, value: $toString$2(object[key]) });
+	    }
+	  },
+	  parseQuery: function (query) {
+	    if (query) {
+	      var attributes = split$3(query, '&');
+	      var index = 0;
+	      var attribute, entry;
+	      while (index < attributes.length) {
+	        attribute = attributes[index++];
+	        if (attribute.length) {
+	          entry = split$3(attribute, '=');
+	          push$7(this.entries, {
+	            key: deserialize(shift$1(entry)),
+	            value: deserialize(join$4(entry, '='))
+	          });
+	        }
+	      }
+	    }
+	  },
+	  serialize: function () {
+	    var entries = this.entries;
+	    var result = [];
+	    var index = 0;
+	    var entry;
+	    while (index < entries.length) {
+	      entry = entries[index++];
+	      push$7(result, serialize(entry.key) + '=' + serialize(entry.value));
+	    } return join$4(result, '&');
+	  },
+	  update: function () {
+	    this.entries.length = 0;
+	    this.parseQuery(this.url.query);
+	  },
+	  updateURL: function () {
+	    if (this.url) this.url.update();
+	  }
 	};
 
-	Headers.prototype.entries = function() {
-	  var items = [];
-	  this.forEach(function(value, name) {
-	    items.push([name, value]);
-	  });
-	  return iteratorFor(items)
+	// `URLSearchParams` constructor
+	// https://url.spec.whatwg.org/#interface-urlsearchparams
+	var URLSearchParamsConstructor = function URLSearchParams(/* init */) {
+	  anInstance$3(this, URLSearchParamsPrototype);
+	  var init = arguments.length > 0 ? arguments[0] : undefined;
+	  setInternalState$2(this, new URLSearchParamsState(init));
 	};
 
-	if (support.iterable) {
-	  Headers.prototype[Symbol.iterator] = Headers.prototype.entries;
-	}
+	var URLSearchParamsPrototype = URLSearchParamsConstructor.prototype;
 
-	function consumed(body) {
-	  if (body.bodyUsed) {
-	    return Promise.reject(new TypeError('Already read'))
+	redefineAll$1(URLSearchParamsPrototype, {
+	  // `URLSearchParams.prototype.append` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-append
+	  append: function append(name, value) {
+	    validateArgumentsLength$2(arguments.length, 2);
+	    var state = getInternalParamsState(this);
+	    push$7(state.entries, { key: $toString$2(name), value: $toString$2(value) });
+	    state.updateURL();
+	  },
+	  // `URLSearchParams.prototype.delete` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-delete
+	  'delete': function (name) {
+	    validateArgumentsLength$2(arguments.length, 1);
+	    var state = getInternalParamsState(this);
+	    var entries = state.entries;
+	    var key = $toString$2(name);
+	    var index = 0;
+	    while (index < entries.length) {
+	      if (entries[index].key === key) splice(entries, index, 1);
+	      else index++;
+	    }
+	    state.updateURL();
+	  },
+	  // `URLSearchParams.prototype.get` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-get
+	  get: function get(name) {
+	    validateArgumentsLength$2(arguments.length, 1);
+	    var entries = getInternalParamsState(this).entries;
+	    var key = $toString$2(name);
+	    var index = 0;
+	    for (; index < entries.length; index++) {
+	      if (entries[index].key === key) return entries[index].value;
+	    }
+	    return null;
+	  },
+	  // `URLSearchParams.prototype.getAll` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-getall
+	  getAll: function getAll(name) {
+	    validateArgumentsLength$2(arguments.length, 1);
+	    var entries = getInternalParamsState(this).entries;
+	    var key = $toString$2(name);
+	    var result = [];
+	    var index = 0;
+	    for (; index < entries.length; index++) {
+	      if (entries[index].key === key) push$7(result, entries[index].value);
+	    }
+	    return result;
+	  },
+	  // `URLSearchParams.prototype.has` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-has
+	  has: function has(name) {
+	    validateArgumentsLength$2(arguments.length, 1);
+	    var entries = getInternalParamsState(this).entries;
+	    var key = $toString$2(name);
+	    var index = 0;
+	    while (index < entries.length) {
+	      if (entries[index++].key === key) return true;
+	    }
+	    return false;
+	  },
+	  // `URLSearchParams.prototype.set` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-set
+	  set: function set(name, value) {
+	    validateArgumentsLength$2(arguments.length, 1);
+	    var state = getInternalParamsState(this);
+	    var entries = state.entries;
+	    var found = false;
+	    var key = $toString$2(name);
+	    var val = $toString$2(value);
+	    var index = 0;
+	    var entry;
+	    for (; index < entries.length; index++) {
+	      entry = entries[index];
+	      if (entry.key === key) {
+	        if (found) splice(entries, index--, 1);
+	        else {
+	          found = true;
+	          entry.value = val;
+	        }
+	      }
+	    }
+	    if (!found) push$7(entries, { key: key, value: val });
+	    state.updateURL();
+	  },
+	  // `URLSearchParams.prototype.sort` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-sort
+	  sort: function sort() {
+	    var state = getInternalParamsState(this);
+	    arraySort(state.entries, function (a, b) {
+	      return a.key > b.key ? 1 : -1;
+	    });
+	    state.updateURL();
+	  },
+	  // `URLSearchParams.prototype.forEach` method
+	  forEach: function forEach(callback /* , thisArg */) {
+	    var entries = getInternalParamsState(this).entries;
+	    var boundFunction = bind$8(callback, arguments.length > 1 ? arguments[1] : undefined);
+	    var index = 0;
+	    var entry;
+	    while (index < entries.length) {
+	      entry = entries[index++];
+	      boundFunction(entry.value, entry.key, this);
+	    }
+	  },
+	  // `URLSearchParams.prototype.keys` method
+	  keys: function keys() {
+	    return new URLSearchParamsIterator(this, 'keys');
+	  },
+	  // `URLSearchParams.prototype.values` method
+	  values: function values() {
+	    return new URLSearchParamsIterator(this, 'values');
+	  },
+	  // `URLSearchParams.prototype.entries` method
+	  entries: function entries() {
+	    return new URLSearchParamsIterator(this, 'entries');
 	  }
-	  body.bodyUsed = true;
-	}
+	}, { enumerable: true });
 
-	function fileReaderReady(reader) {
-	  return new Promise(function(resolve, reject) {
-	    reader.onload = function() {
-	      resolve(reader.result);
-	    };
-	    reader.onerror = function() {
-	      reject(reader.error);
-	    };
-	  })
-	}
+	// `URLSearchParams.prototype[@@iterator]` method
+	redefine$7(URLSearchParamsPrototype, ITERATOR$2, URLSearchParamsPrototype.entries, { name: 'entries' });
 
-	function readBlobAsArrayBuffer(blob) {
-	  var reader = new FileReader();
-	  var promise = fileReaderReady(reader);
-	  reader.readAsArrayBuffer(blob);
-	  return promise
-	}
+	// `URLSearchParams.prototype.toString` method
+	// https://url.spec.whatwg.org/#urlsearchparams-stringification-behavior
+	redefine$7(URLSearchParamsPrototype, 'toString', function toString() {
+	  return getInternalParamsState(this).serialize();
+	}, { enumerable: true });
 
-	function readBlobAsText(blob) {
-	  var reader = new FileReader();
-	  var promise = fileReaderReady(reader);
-	  reader.readAsText(blob);
-	  return promise
-	}
+	setToStringTag$4(URLSearchParamsConstructor, URL_SEARCH_PARAMS);
 
-	function readArrayBufferAsText(buf) {
-	  var view = new Uint8Array(buf);
-	  var chars = new Array(view.length);
+	$$X({ global: true, forced: !USE_NATIVE_URL$1 }, {
+	  URLSearchParams: URLSearchParamsConstructor
+	});
 
-	  for (var i = 0; i < view.length; i++) {
-	    chars[i] = String.fromCharCode(view[i]);
+	// Wrap `fetch` and `Request` for correct work with polyfilled `URLSearchParams`
+	if (!USE_NATIVE_URL$1 && isCallable$5(Headers$1)) {
+	  var headersHas = uncurryThis$u(HeadersPrototype.has);
+	  var headersSet = uncurryThis$u(HeadersPrototype.set);
+
+	  var wrapRequestOptions = function (init) {
+	    if (isObject$d(init)) {
+	      var body = init.body;
+	      var headers;
+	      if (classof$3(body) === URL_SEARCH_PARAMS) {
+	        headers = init.headers ? new Headers$1(init.headers) : new Headers$1();
+	        if (!headersHas(headers, 'content-type')) {
+	          headersSet(headers, 'content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
+	        }
+	        return create$6(init, {
+	          body: createPropertyDescriptor(0, $toString$2(body)),
+	          headers: createPropertyDescriptor(0, headers)
+	        });
+	      }
+	    } return init;
+	  };
+
+	  if (isCallable$5(n$Fetch)) {
+	    $$X({ global: true, enumerable: true, forced: true }, {
+	      fetch: function fetch(input /* , init */) {
+	        return n$Fetch(input, arguments.length > 1 ? wrapRequestOptions(arguments[1]) : {});
+	      }
+	    });
+	  }
+
+	  if (isCallable$5(N$Request)) {
+	    var RequestConstructor = function Request(input /* , init */) {
+	      anInstance$3(this, RequestPrototype);
+	      return new N$Request(input, arguments.length > 1 ? wrapRequestOptions(arguments[1]) : {});
+	    };
+
+	    RequestPrototype.constructor = RequestConstructor;
+	    RequestConstructor.prototype = RequestPrototype;
+
+	    $$X({ global: true, forced: true }, {
+	      Request: RequestConstructor
+	    });
+	  }
+	}
+
+	var web_urlSearchParams = {
+	  URLSearchParams: URLSearchParamsConstructor,
+	  getState: getInternalParamsState
+	};
+
+	var uncurryThis$t = functionUncurryThis;
+	var PROPER_FUNCTION_NAME$1 = functionName.PROPER;
+	var redefine$6 = redefine$h.exports;
+	var anObject$8 = anObject$n;
+	var isPrototypeOf$2 = objectIsPrototypeOf;
+	var $toString$1 = toString$k;
+	var fails$s = fails$V;
+	var regExpFlags$2 = regexpFlags$1;
+
+	var TO_STRING = 'toString';
+	var RegExpPrototype$3 = RegExp.prototype;
+	var n$ToString = RegExpPrototype$3[TO_STRING];
+	var getFlags$1 = uncurryThis$t(regExpFlags$2);
+
+	var NOT_GENERIC = fails$s(function () { return n$ToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });
+	// FF44- RegExp#toString has a wrong name
+	var INCORRECT_NAME = PROPER_FUNCTION_NAME$1 && n$ToString.name != TO_STRING;
+
+	// `RegExp.prototype.toString` method
+	// https://tc39.es/ecma262/#sec-regexp.prototype.tostring
+	if (NOT_GENERIC || INCORRECT_NAME) {
+	  redefine$6(RegExp.prototype, TO_STRING, function toString() {
+	    var R = anObject$8(this);
+	    var p = $toString$1(R.source);
+	    var rf = R.flags;
+	    var f = $toString$1(rf === undefined && isPrototypeOf$2(RegExpPrototype$3, R) && !('flags' in RegExpPrototype$3) ? getFlags$1(R) : rf);
+	    return '/' + p + '/' + f;
+	  }, { unsafe: true });
+	}
+
+	// TODO: Remove from `core-js@4` since it's moved to entry points
+
+	var uncurryThis$s = functionUncurryThis;
+	var redefine$5 = redefine$h.exports;
+	var regexpExec$2 = regexpExec$3;
+	var fails$r = fails$V;
+	var wellKnownSymbol$5 = wellKnownSymbol$t;
+	var createNonEnumerableProperty$1 = createNonEnumerableProperty$b;
+
+	var SPECIES = wellKnownSymbol$5('species');
+	var RegExpPrototype$2 = RegExp.prototype;
+
+	var fixRegexpWellKnownSymbolLogic = function (KEY, exec, FORCED, SHAM) {
+	  var SYMBOL = wellKnownSymbol$5(KEY);
+
+	  var DELEGATES_TO_SYMBOL = !fails$r(function () {
+	    // String methods call symbol-named RegEp methods
+	    var O = {};
+	    O[SYMBOL] = function () { return 7; };
+	    return ''[KEY](O) != 7;
+	  });
+
+	  var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails$r(function () {
+	    // Symbol-named RegExp methods call .exec
+	    var execCalled = false;
+	    var re = /a/;
+
+	    if (KEY === 'split') {
+	      // We can't use real regex here since it causes deoptimization
+	      // and serious performance degradation in V8
+	      // https://github.com/zloirock/core-js/issues/306
+	      re = {};
+	      // RegExp[@@split] doesn't call the regex's exec method, but first creates
+	      // a new one. We need to return the patched regex when creating the new one.
+	      re.constructor = {};
+	      re.constructor[SPECIES] = function () { return re; };
+	      re.flags = '';
+	      re[SYMBOL] = /./[SYMBOL];
+	    }
+
+	    re.exec = function () { execCalled = true; return null; };
+
+	    re[SYMBOL]('');
+	    return !execCalled;
+	  });
+
+	  if (
+	    !DELEGATES_TO_SYMBOL ||
+	    !DELEGATES_TO_EXEC ||
+	    FORCED
+	  ) {
+	    var uncurriedNativeRegExpMethod = uncurryThis$s(/./[SYMBOL]);
+	    var methods = exec(SYMBOL, ''[KEY], function (nativeMethod, regexp, str, arg2, forceStringMethod) {
+	      var uncurriedNativeMethod = uncurryThis$s(nativeMethod);
+	      var $exec = regexp.exec;
+	      if ($exec === regexpExec$2 || $exec === RegExpPrototype$2.exec) {
+	        if (DELEGATES_TO_SYMBOL && !forceStringMethod) {
+	          // The native String method already delegates to @@method (this
+	          // polyfilled function), leasing to infinite recursion.
+	          // We avoid it by directly calling the native @@method method.
+	          return { done: true, value: uncurriedNativeRegExpMethod(regexp, str, arg2) };
+	        }
+	        return { done: true, value: uncurriedNativeMethod(str, regexp, arg2) };
+	      }
+	      return { done: false };
+	    });
+
+	    redefine$5(String.prototype, KEY, methods[0]);
+	    redefine$5(RegExpPrototype$2, SYMBOL, methods[1]);
+	  }
+
+	  if (SHAM) createNonEnumerableProperty$1(RegExpPrototype$2[SYMBOL], 'sham', true);
+	};
+
+	var charAt$4 = stringMultibyte.charAt;
+
+	// `AdvanceStringIndex` abstract operation
+	// https://tc39.es/ecma262/#sec-advancestringindex
+	var advanceStringIndex$3 = function (S, index, unicode) {
+	  return index + (unicode ? charAt$4(S, index).length : 1);
+	};
+
+	var uncurryThis$r = functionUncurryThis;
+	var toObject$9 = toObject$i;
+
+	var floor$3 = Math.floor;
+	var charAt$3 = uncurryThis$r(''.charAt);
+	var replace$5 = uncurryThis$r(''.replace);
+	var stringSlice$7 = uncurryThis$r(''.slice);
+	var SUBSTITUTION_SYMBOLS = /\$([$&'`]|\d{1,2}|<[^>]*>)/g;
+	var SUBSTITUTION_SYMBOLS_NO_NAMED = /\$([$&'`]|\d{1,2})/g;
+
+	// `GetSubstitution` abstract operation
+	// https://tc39.es/ecma262/#sec-getsubstitution
+	var getSubstitution$1 = function (matched, str, position, captures, namedCaptures, replacement) {
+	  var tailPos = position + matched.length;
+	  var m = captures.length;
+	  var symbols = SUBSTITUTION_SYMBOLS_NO_NAMED;
+	  if (namedCaptures !== undefined) {
+	    namedCaptures = toObject$9(namedCaptures);
+	    symbols = SUBSTITUTION_SYMBOLS;
+	  }
+	  return replace$5(replacement, symbols, function (match, ch) {
+	    var capture;
+	    switch (charAt$3(ch, 0)) {
+	      case '$': return '$';
+	      case '&': return matched;
+	      case '`': return stringSlice$7(str, 0, position);
+	      case "'": return stringSlice$7(str, tailPos);
+	      case '<':
+	        capture = namedCaptures[stringSlice$7(ch, 1, -1)];
+	        break;
+	      default: // \d\d?
+	        var n = +ch;
+	        if (n === 0) return match;
+	        if (n > m) {
+	          var f = floor$3(n / 10);
+	          if (f === 0) return match;
+	          if (f <= m) return captures[f - 1] === undefined ? charAt$3(ch, 1) : captures[f - 1] + charAt$3(ch, 1);
+	          return match;
+	        }
+	        capture = captures[n - 1];
+	    }
+	    return capture === undefined ? '' : capture;
+	  });
+	};
+
+	var global$m = global$1o;
+	var call$8 = functionCall;
+	var anObject$7 = anObject$n;
+	var isCallable$4 = isCallable$r;
+	var classof$2 = classofRaw$1;
+	var regexpExec$1 = regexpExec$3;
+
+	var TypeError$7 = global$m.TypeError;
+
+	// `RegExpExec` abstract operation
+	// https://tc39.es/ecma262/#sec-regexpexec
+	var regexpExecAbstract = function (R, S) {
+	  var exec = R.exec;
+	  if (isCallable$4(exec)) {
+	    var result = call$8(exec, R, S);
+	    if (result !== null) anObject$7(result);
+	    return result;
+	  }
+	  if (classof$2(R) === 'RegExp') return call$8(regexpExec$1, R, S);
+	  throw TypeError$7('RegExp#exec called on incompatible receiver');
+	};
+
+	var apply$3 = functionApply;
+	var call$7 = functionCall;
+	var uncurryThis$q = functionUncurryThis;
+	var fixRegExpWellKnownSymbolLogic$3 = fixRegexpWellKnownSymbolLogic;
+	var fails$q = fails$V;
+	var anObject$6 = anObject$n;
+	var isCallable$3 = isCallable$r;
+	var toIntegerOrInfinity$3 = toIntegerOrInfinity$b;
+	var toLength$5 = toLength$c;
+	var toString$f = toString$k;
+	var requireObjectCoercible$a = requireObjectCoercible$e;
+	var advanceStringIndex$2 = advanceStringIndex$3;
+	var getMethod$3 = getMethod$7;
+	var getSubstitution = getSubstitution$1;
+	var regExpExec$3 = regexpExecAbstract;
+	var wellKnownSymbol$4 = wellKnownSymbol$t;
+
+	var REPLACE = wellKnownSymbol$4('replace');
+	var max$2 = Math.max;
+	var min$5 = Math.min;
+	var concat$2 = uncurryThis$q([].concat);
+	var push$6 = uncurryThis$q([].push);
+	var stringIndexOf$2 = uncurryThis$q(''.indexOf);
+	var stringSlice$6 = uncurryThis$q(''.slice);
+
+	var maybeToString = function (it) {
+	  return it === undefined ? it : String(it);
+	};
+
+	// IE <= 11 replaces $0 with the whole match, as if it was $&
+	// https://stackoverflow.com/questions/6024666/getting-ie-to-replace-a-regex-with-the-literal-string-0
+	var REPLACE_KEEPS_$0 = (function () {
+	  // eslint-disable-next-line regexp/prefer-escape-replacement-dollar-char -- required for testing
+	  return 'a'.replace(/./, '$0') === '$0';
+	})();
+
+	// Safari <= 13.0.3(?) substitutes nth capture where n>m with an empty string
+	var REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = (function () {
+	  if (/./[REPLACE]) {
+	    return /./[REPLACE]('a', '$0') === '';
+	  }
+	  return false;
+	})();
+
+	var REPLACE_SUPPORTS_NAMED_GROUPS = !fails$q(function () {
+	  var re = /./;
+	  re.exec = function () {
+	    var result = [];
+	    result.groups = { a: '7' };
+	    return result;
+	  };
+	  // eslint-disable-next-line regexp/no-useless-dollar-replacements -- false positive
+	  return ''.replace(re, '$<a>') !== '7';
+	});
+
+	// @@replace logic
+	fixRegExpWellKnownSymbolLogic$3('replace', function (_, nativeReplace, maybeCallNative) {
+	  var UNSAFE_SUBSTITUTE = REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE ? '$' : '$0';
+
+	  return [
+	    // `String.prototype.replace` method
+	    // https://tc39.es/ecma262/#sec-string.prototype.replace
+	    function replace(searchValue, replaceValue) {
+	      var O = requireObjectCoercible$a(this);
+	      var replacer = searchValue == undefined ? undefined : getMethod$3(searchValue, REPLACE);
+	      return replacer
+	        ? call$7(replacer, searchValue, O, replaceValue)
+	        : call$7(nativeReplace, toString$f(O), searchValue, replaceValue);
+	    },
+	    // `RegExp.prototype[@@replace]` method
+	    // https://tc39.es/ecma262/#sec-regexp.prototype-@@replace
+	    function (string, replaceValue) {
+	      var rx = anObject$6(this);
+	      var S = toString$f(string);
+
+	      if (
+	        typeof replaceValue == 'string' &&
+	        stringIndexOf$2(replaceValue, UNSAFE_SUBSTITUTE) === -1 &&
+	        stringIndexOf$2(replaceValue, '$<') === -1
+	      ) {
+	        var res = maybeCallNative(nativeReplace, rx, S, replaceValue);
+	        if (res.done) return res.value;
+	      }
+
+	      var functionalReplace = isCallable$3(replaceValue);
+	      if (!functionalReplace) replaceValue = toString$f(replaceValue);
+
+	      var global = rx.global;
+	      if (global) {
+	        var fullUnicode = rx.unicode;
+	        rx.lastIndex = 0;
+	      }
+	      var results = [];
+	      while (true) {
+	        var result = regExpExec$3(rx, S);
+	        if (result === null) break;
+
+	        push$6(results, result);
+	        if (!global) break;
+
+	        var matchStr = toString$f(result[0]);
+	        if (matchStr === '') rx.lastIndex = advanceStringIndex$2(S, toLength$5(rx.lastIndex), fullUnicode);
+	      }
+
+	      var accumulatedResult = '';
+	      var nextSourcePosition = 0;
+	      for (var i = 0; i < results.length; i++) {
+	        result = results[i];
+
+	        var matched = toString$f(result[0]);
+	        var position = max$2(min$5(toIntegerOrInfinity$3(result.index), S.length), 0);
+	        var captures = [];
+	        // NOTE: This is equivalent to
+	        //   captures = result.slice(1).map(maybeToString)
+	        // but for some reason `nativeSlice.call(result, 1, result.length)` (called in
+	        // the slice polyfill when slicing native arrays) "doesn't work" in safari 9 and
+	        // causes a crash (https://pastebin.com/N21QzeQA) when trying to debug it.
+	        for (var j = 1; j < result.length; j++) push$6(captures, maybeToString(result[j]));
+	        var namedCaptures = result.groups;
+	        if (functionalReplace) {
+	          var replacerArgs = concat$2([matched], captures, position, S);
+	          if (namedCaptures !== undefined) push$6(replacerArgs, namedCaptures);
+	          var replacement = toString$f(apply$3(replaceValue, undefined, replacerArgs));
+	        } else {
+	          replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);
+	        }
+	        if (position >= nextSourcePosition) {
+	          accumulatedResult += stringSlice$6(S, nextSourcePosition, position) + replacement;
+	          nextSourcePosition = position + matched.length;
+	        }
+	      }
+	      return accumulatedResult + stringSlice$6(S, nextSourcePosition);
+	    }
+	  ];
+	}, !REPLACE_SUPPORTS_NAMED_GROUPS || !REPLACE_KEEPS_$0 || REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE);
+
+	var isObject$c = isObject$s;
+	var classof$1 = classofRaw$1;
+	var wellKnownSymbol$3 = wellKnownSymbol$t;
+
+	var MATCH$2 = wellKnownSymbol$3('match');
+
+	// `IsRegExp` abstract operation
+	// https://tc39.es/ecma262/#sec-isregexp
+	var isRegexp = function (it) {
+	  var isRegExp;
+	  return isObject$c(it) && ((isRegExp = it[MATCH$2]) !== undefined ? !!isRegExp : classof$1(it) == 'RegExp');
+	};
+
+	var apply$2 = functionApply;
+	var call$6 = functionCall;
+	var uncurryThis$p = functionUncurryThis;
+	var fixRegExpWellKnownSymbolLogic$2 = fixRegexpWellKnownSymbolLogic;
+	var isRegExp$2 = isRegexp;
+	var anObject$5 = anObject$n;
+	var requireObjectCoercible$9 = requireObjectCoercible$e;
+	var speciesConstructor$1 = speciesConstructor$5;
+	var advanceStringIndex$1 = advanceStringIndex$3;
+	var toLength$4 = toLength$c;
+	var toString$e = toString$k;
+	var getMethod$2 = getMethod$7;
+	var arraySlice$4 = arraySliceSimple;
+	var callRegExpExec = regexpExecAbstract;
+	var regexpExec = regexpExec$3;
+	var stickyHelpers$1 = regexpStickyHelpers;
+	var fails$p = fails$V;
+
+	var UNSUPPORTED_Y$1 = stickyHelpers$1.UNSUPPORTED_Y;
+	var MAX_UINT32 = 0xFFFFFFFF;
+	var min$4 = Math.min;
+	var $push = [].push;
+	var exec$4 = uncurryThis$p(/./.exec);
+	var push$5 = uncurryThis$p($push);
+	var stringSlice$5 = uncurryThis$p(''.slice);
+
+	// Chrome 51 has a buggy "split" implementation when RegExp#exec !== nativeExec
+	// Weex JS has frozen built-in prototypes, so use try / catch wrapper
+	var SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = !fails$p(function () {
+	  // eslint-disable-next-line regexp/no-empty-group -- required for testing
+	  var re = /(?:)/;
+	  var originalExec = re.exec;
+	  re.exec = function () { return originalExec.apply(this, arguments); };
+	  var result = 'ab'.split(re);
+	  return result.length !== 2 || result[0] !== 'a' || result[1] !== 'b';
+	});
+
+	// @@split logic
+	fixRegExpWellKnownSymbolLogic$2('split', function (SPLIT, nativeSplit, maybeCallNative) {
+	  var internalSplit;
+	  if (
+	    'abbc'.split(/(b)*/)[1] == 'c' ||
+	    // eslint-disable-next-line regexp/no-empty-group -- required for testing
+	    'test'.split(/(?:)/, -1).length != 4 ||
+	    'ab'.split(/(?:ab)*/).length != 2 ||
+	    '.'.split(/(.?)(.?)/).length != 4 ||
+	    // eslint-disable-next-line regexp/no-empty-capturing-group, regexp/no-empty-group -- required for testing
+	    '.'.split(/()()/).length > 1 ||
+	    ''.split(/.?/).length
+	  ) {
+	    // based on es5-shim implementation, need to rework it
+	    internalSplit = function (separator, limit) {
+	      var string = toString$e(requireObjectCoercible$9(this));
+	      var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
+	      if (lim === 0) return [];
+	      if (separator === undefined) return [string];
+	      // If `separator` is not a regex, use native split
+	      if (!isRegExp$2(separator)) {
+	        return call$6(nativeSplit, string, separator, lim);
+	      }
+	      var output = [];
+	      var flags = (separator.ignoreCase ? 'i' : '') +
+	                  (separator.multiline ? 'm' : '') +
+	                  (separator.unicode ? 'u' : '') +
+	                  (separator.sticky ? 'y' : '');
+	      var lastLastIndex = 0;
+	      // Make `global` and avoid `lastIndex` issues by working with a copy
+	      var separatorCopy = new RegExp(separator.source, flags + 'g');
+	      var match, lastIndex, lastLength;
+	      while (match = call$6(regexpExec, separatorCopy, string)) {
+	        lastIndex = separatorCopy.lastIndex;
+	        if (lastIndex > lastLastIndex) {
+	          push$5(output, stringSlice$5(string, lastLastIndex, match.index));
+	          if (match.length > 1 && match.index < string.length) apply$2($push, output, arraySlice$4(match, 1));
+	          lastLength = match[0].length;
+	          lastLastIndex = lastIndex;
+	          if (output.length >= lim) break;
+	        }
+	        if (separatorCopy.lastIndex === match.index) separatorCopy.lastIndex++; // Avoid an infinite loop
+	      }
+	      if (lastLastIndex === string.length) {
+	        if (lastLength || !exec$4(separatorCopy, '')) push$5(output, '');
+	      } else push$5(output, stringSlice$5(string, lastLastIndex));
+	      return output.length > lim ? arraySlice$4(output, 0, lim) : output;
+	    };
+	  // Chakra, V8
+	  } else if ('0'.split(undefined, 0).length) {
+	    internalSplit = function (separator, limit) {
+	      return separator === undefined && limit === 0 ? [] : call$6(nativeSplit, this, separator, limit);
+	    };
+	  } else internalSplit = nativeSplit;
+
+	  return [
+	    // `String.prototype.split` method
+	    // https://tc39.es/ecma262/#sec-string.prototype.split
+	    function split(separator, limit) {
+	      var O = requireObjectCoercible$9(this);
+	      var splitter = separator == undefined ? undefined : getMethod$2(separator, SPLIT);
+	      return splitter
+	        ? call$6(splitter, separator, O, limit)
+	        : call$6(internalSplit, toString$e(O), separator, limit);
+	    },
+	    // `RegExp.prototype[@@split]` method
+	    // https://tc39.es/ecma262/#sec-regexp.prototype-@@split
+	    //
+	    // NOTE: This cannot be properly polyfilled in engines that don't support
+	    // the 'y' flag.
+	    function (string, limit) {
+	      var rx = anObject$5(this);
+	      var S = toString$e(string);
+	      var res = maybeCallNative(internalSplit, rx, S, limit, internalSplit !== nativeSplit);
+
+	      if (res.done) return res.value;
+
+	      var C = speciesConstructor$1(rx, RegExp);
+
+	      var unicodeMatching = rx.unicode;
+	      var flags = (rx.ignoreCase ? 'i' : '') +
+	                  (rx.multiline ? 'm' : '') +
+	                  (rx.unicode ? 'u' : '') +
+	                  (UNSUPPORTED_Y$1 ? 'g' : 'y');
+
+	      // ^(? + rx + ) is needed, in combination with some S slicing, to
+	      // simulate the 'y' flag.
+	      var splitter = new C(UNSUPPORTED_Y$1 ? '^(?:' + rx.source + ')' : rx, flags);
+	      var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
+	      if (lim === 0) return [];
+	      if (S.length === 0) return callRegExpExec(splitter, S) === null ? [S] : [];
+	      var p = 0;
+	      var q = 0;
+	      var A = [];
+	      while (q < S.length) {
+	        splitter.lastIndex = UNSUPPORTED_Y$1 ? 0 : q;
+	        var z = callRegExpExec(splitter, UNSUPPORTED_Y$1 ? stringSlice$5(S, q) : S);
+	        var e;
+	        if (
+	          z === null ||
+	          (e = min$4(toLength$4(splitter.lastIndex + (UNSUPPORTED_Y$1 ? q : 0)), S.length)) === p
+	        ) {
+	          q = advanceStringIndex$1(S, q, unicodeMatching);
+	        } else {
+	          push$5(A, stringSlice$5(S, p, q));
+	          if (A.length === lim) return A;
+	          for (var i = 1; i <= z.length - 1; i++) {
+	            push$5(A, z[i]);
+	            if (A.length === lim) return A;
+	          }
+	          q = p = e;
+	        }
+	      }
+	      push$5(A, stringSlice$5(S, p));
+	      return A;
+	    }
+	  ];
+	}, !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC, UNSUPPORTED_Y$1);
+
+	// a string of all valid unicode whitespaces
+	var whitespaces$4 = '\u0009\u000A\u000B\u000C\u000D\u0020\u00A0\u1680\u2000\u2001\u2002' +
+	  '\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF';
+
+	var uncurryThis$o = functionUncurryThis;
+	var requireObjectCoercible$8 = requireObjectCoercible$e;
+	var toString$d = toString$k;
+	var whitespaces$3 = whitespaces$4;
+
+	var replace$4 = uncurryThis$o(''.replace);
+	var whitespace = '[' + whitespaces$3 + ']';
+	var ltrim = RegExp('^' + whitespace + whitespace + '*');
+	var rtrim$2 = RegExp(whitespace + whitespace + '*$');
+
+	// `String.prototype.{ trim, trimStart, trimEnd, trimLeft, trimRight }` methods implementation
+	var createMethod$2 = function (TYPE) {
+	  return function ($this) {
+	    var string = toString$d(requireObjectCoercible$8($this));
+	    if (TYPE & 1) string = replace$4(string, ltrim, '');
+	    if (TYPE & 2) string = replace$4(string, rtrim$2, '');
+	    return string;
+	  };
+	};
+
+	var stringTrim = {
+	  // `String.prototype.{ trimLeft, trimStart }` methods
+	  // https://tc39.es/ecma262/#sec-string.prototype.trimstart
+	  start: createMethod$2(1),
+	  // `String.prototype.{ trimRight, trimEnd }` methods
+	  // https://tc39.es/ecma262/#sec-string.prototype.trimend
+	  end: createMethod$2(2),
+	  // `String.prototype.trim` method
+	  // https://tc39.es/ecma262/#sec-string.prototype.trim
+	  trim: createMethod$2(3)
+	};
+
+	var PROPER_FUNCTION_NAME = functionName.PROPER;
+	var fails$o = fails$V;
+	var whitespaces$2 = whitespaces$4;
+
+	var non = '\u200B\u0085\u180E';
+
+	// check that a method works with the correct list
+	// of whitespaces and has a correct name
+	var stringTrimForced = function (METHOD_NAME) {
+	  return fails$o(function () {
+	    return !!whitespaces$2[METHOD_NAME]()
+	      || non[METHOD_NAME]() !== non
+	      || (PROPER_FUNCTION_NAME && whitespaces$2[METHOD_NAME].name !== METHOD_NAME);
+	  });
+	};
+
+	var $$W = _export;
+	var $trim = stringTrim.trim;
+	var forcedStringTrimMethod$2 = stringTrimForced;
+
+	// `String.prototype.trim` method
+	// https://tc39.es/ecma262/#sec-string.prototype.trim
+	$$W({ target: 'String', proto: true, forced: forcedStringTrimMethod$2('trim') }, {
+	  trim: function trim() {
+	    return $trim(this);
+	  }
+	});
+
+	var DESCRIPTORS$b = descriptors;
+	var FUNCTION_NAME_EXISTS = functionName.EXISTS;
+	var uncurryThis$n = functionUncurryThis;
+	var defineProperty$6 = objectDefineProperty.f;
+
+	var FunctionPrototype = Function.prototype;
+	var functionToString = uncurryThis$n(FunctionPrototype.toString);
+	var nameRE = /function\b(?:\s|\/\*[\S\s]*?\*\/|\/\/[^\n\r]*[\n\r]+)*([^\s(/]*)/;
+	var regExpExec$2 = uncurryThis$n(nameRE.exec);
+	var NAME = 'name';
+
+	// Function instances `.name` property
+	// https://tc39.es/ecma262/#sec-function-instances-name
+	if (DESCRIPTORS$b && !FUNCTION_NAME_EXISTS) {
+	  defineProperty$6(FunctionPrototype, NAME, {
+	    configurable: true,
+	    get: function () {
+	      try {
+	        return regExpExec$2(nameRE, functionToString(this))[1];
+	      } catch (error) {
+	        return '';
+	      }
+	    }
+	  });
+	}
+
+	var $$V = _export;
+	var DESCRIPTORS$a = descriptors;
+	var create$5 = objectCreate;
+
+	// `Object.create` method
+	// https://tc39.es/ecma262/#sec-object.create
+	$$V({ target: 'Object', stat: true, sham: !DESCRIPTORS$a }, {
+	  create: create$5
+	});
+
+	var $$U = _export;
+	var global$l = global$1o;
+	var apply$1 = functionApply;
+	var isCallable$2 = isCallable$r;
+	var userAgent$1 = engineUserAgent;
+	var arraySlice$3 = arraySlice$b;
+	var validateArgumentsLength$1 = validateArgumentsLength$4;
+
+	var MSIE = /MSIE .\./.test(userAgent$1); // <- dirty ie9- check
+	var Function$2 = global$l.Function;
+
+	var wrap$1 = function (scheduler) {
+	  return function (handler, timeout /* , ...arguments */) {
+	    var boundArgs = validateArgumentsLength$1(arguments.length, 1) > 2;
+	    var fn = isCallable$2(handler) ? handler : Function$2(handler);
+	    var args = boundArgs ? arraySlice$3(arguments, 2) : undefined;
+	    return scheduler(boundArgs ? function () {
+	      apply$1(fn, this, args);
+	    } : fn, timeout);
+	  };
+	};
+
+	// ie9- setTimeout & setInterval additional parameters fix
+	// https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#timers
+	$$U({ global: true, bind: true, forced: MSIE }, {
+	  // `setTimeout` method
+	  // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-settimeout
+	  setTimeout: wrap$1(global$l.setTimeout),
+	  // `setInterval` method
+	  // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-setinterval
+	  setInterval: wrap$1(global$l.setInterval)
+	});
+
+	var global$k = typeof globalThis !== 'undefined' && globalThis || typeof self !== 'undefined' && self || typeof global$k !== 'undefined' && global$k;
+	var support = {
+	  searchParams: 'URLSearchParams' in global$k,
+	  iterable: 'Symbol' in global$k && 'iterator' in Symbol,
+	  blob: 'FileReader' in global$k && 'Blob' in global$k && function () {
+	    try {
+	      new Blob();
+	      return true;
+	    } catch (e) {
+	      return false;
+	    }
+	  }(),
+	  formData: 'FormData' in global$k,
+	  arrayBuffer: 'ArrayBuffer' in global$k
+	};
+
+	function isDataView(obj) {
+	  return obj && DataView.prototype.isPrototypeOf(obj);
+	}
+
+	if (support.arrayBuffer) {
+	  var viewClasses = ['[object Int8Array]', '[object Uint8Array]', '[object Uint8ClampedArray]', '[object Int16Array]', '[object Uint16Array]', '[object Int32Array]', '[object Uint32Array]', '[object Float32Array]', '[object Float64Array]'];
+
+	  var isArrayBufferView = ArrayBuffer.isView || function (obj) {
+	    return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1;
+	  };
+	}
+
+	function normalizeName(name) {
+	  if (typeof name !== 'string') {
+	    name = String(name);
+	  }
+
+	  if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
+	    throw new TypeError('Invalid character in header field name: "' + name + '"');
+	  }
+
+	  return name.toLowerCase();
+	}
+
+	function normalizeValue(value) {
+	  if (typeof value !== 'string') {
+	    value = String(value);
+	  }
+
+	  return value;
+	} // Build a destructive iterator for the value list
+
+
+	function iteratorFor(items) {
+	  var iterator = {
+	    next: function next() {
+	      var value = items.shift();
+	      return {
+	        done: value === undefined,
+	        value: value
+	      };
+	    }
+	  };
+
+	  if (support.iterable) {
+	    iterator[Symbol.iterator] = function () {
+	      return iterator;
+	    };
+	  }
+
+	  return iterator;
+	}
+
+	function Headers(headers) {
+	  this.map = {};
+
+	  if (headers instanceof Headers) {
+	    headers.forEach(function (value, name) {
+	      this.append(name, value);
+	    }, this);
+	  } else if (Array.isArray(headers)) {
+	    headers.forEach(function (header) {
+	      this.append(header[0], header[1]);
+	    }, this);
+	  } else if (headers) {
+	    Object.getOwnPropertyNames(headers).forEach(function (name) {
+	      this.append(name, headers[name]);
+	    }, this);
+	  }
+	}
+
+	Headers.prototype.append = function (name, value) {
+	  name = normalizeName(name);
+	  value = normalizeValue(value);
+	  var oldValue = this.map[name];
+	  this.map[name] = oldValue ? oldValue + ', ' + value : value;
+	};
+
+	Headers.prototype['delete'] = function (name) {
+	  delete this.map[normalizeName(name)];
+	};
+
+	Headers.prototype.get = function (name) {
+	  name = normalizeName(name);
+	  return this.has(name) ? this.map[name] : null;
+	};
+
+	Headers.prototype.has = function (name) {
+	  return this.map.hasOwnProperty(normalizeName(name));
+	};
+
+	Headers.prototype.set = function (name, value) {
+	  this.map[normalizeName(name)] = normalizeValue(value);
+	};
+
+	Headers.prototype.forEach = function (callback, thisArg) {
+	  for (var name in this.map) {
+	    if (this.map.hasOwnProperty(name)) {
+	      callback.call(thisArg, this.map[name], name, this);
+	    }
+	  }
+	};
+
+	Headers.prototype.keys = function () {
+	  var items = [];
+	  this.forEach(function (value, name) {
+	    items.push(name);
+	  });
+	  return iteratorFor(items);
+	};
+
+	Headers.prototype.values = function () {
+	  var items = [];
+	  this.forEach(function (value) {
+	    items.push(value);
+	  });
+	  return iteratorFor(items);
+	};
+
+	Headers.prototype.entries = function () {
+	  var items = [];
+	  this.forEach(function (value, name) {
+	    items.push([name, value]);
+	  });
+	  return iteratorFor(items);
+	};
+
+	if (support.iterable) {
+	  Headers.prototype[Symbol.iterator] = Headers.prototype.entries;
+	}
+
+	function consumed(body) {
+	  if (body.bodyUsed) {
+	    return Promise.reject(new TypeError('Already read'));
+	  }
+
+	  body.bodyUsed = true;
+	}
+
+	function fileReaderReady(reader) {
+	  return new Promise(function (resolve, reject) {
+	    reader.onload = function () {
+	      resolve(reader.result);
+	    };
+
+	    reader.onerror = function () {
+	      reject(reader.error);
+	    };
+	  });
+	}
+
+	function readBlobAsArrayBuffer(blob) {
+	  var reader = new FileReader();
+	  var promise = fileReaderReady(reader);
+	  reader.readAsArrayBuffer(blob);
+	  return promise;
+	}
+
+	function readBlobAsText(blob) {
+	  var reader = new FileReader();
+	  var promise = fileReaderReady(reader);
+	  reader.readAsText(blob);
+	  return promise;
+	}
+
+	function readArrayBufferAsText(buf) {
+	  var view = new Uint8Array(buf);
+	  var chars = new Array(view.length);
+
+	  for (var i = 0; i < view.length; i++) {
+	    chars[i] = String.fromCharCode(view[i]);
 	  }
-	  return chars.join('')
+
+	  return chars.join('');
 	}
 
 	function bufferClone(buf) {
 	  if (buf.slice) {
-	    return buf.slice(0)
+	    return buf.slice(0);
 	  } else {
 	    var view = new Uint8Array(buf.byteLength);
 	    view.set(new Uint8Array(buf));
-	    return view.buffer
+	    return view.buffer;
 	  }
 	}
 
 	function Body() {
 	  this.bodyUsed = false;
 
-	  this._initBody = function(body) {
+	  this._initBody = function (body) {
 	    /*
 	      fetch-mock wraps the Response object in an ES6 Proxy to
 	      provide useful test harness features such as flush. However, on
@@ -5060,6 +6783,7 @@
 	    */
 	    this.bodyUsed = this.bodyUsed;
 	    this._bodyInit = body;
+
 	    if (!body) {
 	      this._bodyText = '';
 	    } else if (typeof body === 'string') {
@@ -5071,8 +6795,8 @@
 	    } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
 	      this._bodyText = body.toString();
 	    } else if (support.arrayBuffer && support.blob && isDataView(body)) {
-	      this._bodyArrayBuffer = bufferClone(body.buffer);
-	      // IE 10-11 can't handle a DataView body.
+	      this._bodyArrayBuffer = bufferClone(body.buffer); // IE 10-11 can't handle a DataView body.
+
 	      this._bodyInit = new Blob([this._bodyArrayBuffer]);
 	    } else if (support.arrayBuffer && (ArrayBuffer.prototype.isPrototypeOf(body) || isArrayBufferView(body))) {
 	      this._bodyArrayBuffer = bufferClone(body);
@@ -5092,86 +6816,106 @@
 	  };
 
 	  if (support.blob) {
-	    this.blob = function() {
+	    this.blob = function () {
 	      var rejected = consumed(this);
+
 	      if (rejected) {
-	        return rejected
+	        return rejected;
 	      }
 
 	      if (this._bodyBlob) {
-	        return Promise.resolve(this._bodyBlob)
+	        return Promise.resolve(this._bodyBlob);
 	      } else if (this._bodyArrayBuffer) {
-	        return Promise.resolve(new Blob([this._bodyArrayBuffer]))
+	        return Promise.resolve(new Blob([this._bodyArrayBuffer]));
 	      } else if (this._bodyFormData) {
-	        throw new Error('could not read FormData body as blob')
+	        throw new Error('could not read FormData body as blob');
 	      } else {
-	        return Promise.resolve(new Blob([this._bodyText]))
+	        return Promise.resolve(new Blob([this._bodyText]));
 	      }
 	    };
 
-	    this.arrayBuffer = function() {
+	    this.arrayBuffer = function () {
 	      if (this._bodyArrayBuffer) {
-	        return consumed(this) || Promise.resolve(this._bodyArrayBuffer)
+	        var isConsumed = consumed(this);
+
+	        if (isConsumed) {
+	          return isConsumed;
+	        }
+
+	        if (ArrayBuffer.isView(this._bodyArrayBuffer)) {
+	          return Promise.resolve(this._bodyArrayBuffer.buffer.slice(this._bodyArrayBuffer.byteOffset, this._bodyArrayBuffer.byteOffset + this._bodyArrayBuffer.byteLength));
+	        } else {
+	          return Promise.resolve(this._bodyArrayBuffer);
+	        }
 	      } else {
-	        return this.blob().then(readBlobAsArrayBuffer)
+	        return this.blob().then(readBlobAsArrayBuffer);
 	      }
 	    };
 	  }
 
-	  this.text = function() {
+	  this.text = function () {
 	    var rejected = consumed(this);
+
 	    if (rejected) {
-	      return rejected
+	      return rejected;
 	    }
 
 	    if (this._bodyBlob) {
-	      return readBlobAsText(this._bodyBlob)
+	      return readBlobAsText(this._bodyBlob);
 	    } else if (this._bodyArrayBuffer) {
-	      return Promise.resolve(readArrayBufferAsText(this._bodyArrayBuffer))
+	      return Promise.resolve(readArrayBufferAsText(this._bodyArrayBuffer));
 	    } else if (this._bodyFormData) {
-	      throw new Error('could not read FormData body as text')
+	      throw new Error('could not read FormData body as text');
 	    } else {
-	      return Promise.resolve(this._bodyText)
+	      return Promise.resolve(this._bodyText);
 	    }
 	  };
 
 	  if (support.formData) {
-	    this.formData = function() {
-	      return this.text().then(decode)
+	    this.formData = function () {
+	      return this.text().then(decode);
 	    };
 	  }
 
-	  this.json = function() {
-	    return this.text().then(JSON.parse)
+	  this.json = function () {
+	    return this.text().then(JSON.parse);
 	  };
 
-	  return this
-	}
+	  return this;
+	} // HTTP methods whose capitalization should be normalized
+
 
-	// HTTP methods whose capitalization should be normalized
 	var methods = ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT'];
 
 	function normalizeMethod(method) {
 	  var upcased = method.toUpperCase();
-	  return methods.indexOf(upcased) > -1 ? upcased : method
+	  return methods.indexOf(upcased) > -1 ? upcased : method;
 	}
 
 	function Request(input, options) {
+	  if (!(this instanceof Request)) {
+	    throw new TypeError('Please use the "new" operator, this DOM object constructor cannot be called as a function.');
+	  }
+
 	  options = options || {};
 	  var body = options.body;
 
 	  if (input instanceof Request) {
 	    if (input.bodyUsed) {
-	      throw new TypeError('Already read')
+	      throw new TypeError('Already read');
 	    }
+
 	    this.url = input.url;
 	    this.credentials = input.credentials;
+
 	    if (!options.headers) {
 	      this.headers = new Headers(input.headers);
 	    }
+
 	    this.method = input.method;
 	    this.mode = input.mode;
 	    this.signal = input.signal;
+
 	    if (!body && input._bodyInit != null) {
 	      body = input._bodyInit;
 	      input.bodyUsed = true;
@@ -5181,23 +6925,27 @@
 	  }
 
 	  this.credentials = options.credentials || this.credentials || 'same-origin';
+
 	  if (options.headers || !this.headers) {
 	    this.headers = new Headers(options.headers);
 	  }
+
 	  this.method = normalizeMethod(options.method || this.method || 'GET');
 	  this.mode = options.mode || this.mode || null;
 	  this.signal = options.signal || this.signal;
 	  this.referrer = null;
 
 	  if ((this.method === 'GET' || this.method === 'HEAD') && body) {
-	    throw new TypeError('Body not allowed for GET or HEAD requests')
+	    throw new TypeError('Body not allowed for GET or HEAD requests');
 	  }
+
 	  this._initBody(body);
 
 	  if (this.method === 'GET' || this.method === 'HEAD') {
 	    if (options.cache === 'no-store' || options.cache === 'no-cache') {
 	      // Search for a '_' parameter in the query string
 	      var reParamSearch = /([?&])_=[^&]*/;
+
 	      if (reParamSearch.test(this.url)) {
 	        // If it already exists then set the value with the current time
 	        this.url = this.url.replace(reParamSearch, '$1_=' + new Date().getTime());
@@ -5210,45 +6958,53 @@
 	  }
 	}
 
-	Request.prototype.clone = function() {
-	  return new Request(this, {body: this._bodyInit})
+	Request.prototype.clone = function () {
+	  return new Request(this, {
+	    body: this._bodyInit
+	  });
 	};
 
 	function decode(body) {
 	  var form = new FormData();
-	  body
-	    .trim()
-	    .split('&')
-	    .forEach(function(bytes) {
-	      if (bytes) {
-	        var split = bytes.split('=');
-	        var name = split.shift().replace(/\+/g, ' ');
-	        var value = split.join('=').replace(/\+/g, ' ');
-	        form.append(decodeURIComponent(name), decodeURIComponent(value));
-	      }
-	    });
-	  return form
+	  body.trim().split('&').forEach(function (bytes) {
+	    if (bytes) {
+	      var split = bytes.split('=');
+	      var name = split.shift().replace(/\+/g, ' ');
+	      var value = split.join('=').replace(/\+/g, ' ');
+	      form.append(decodeURIComponent(name), decodeURIComponent(value));
+	    }
+	  });
+	  return form;
 	}
 
 	function parseHeaders(rawHeaders) {
-	  var headers = new Headers();
-	  // Replace instances of \r\n and \n followed by at least one space or horizontal tab with a space
+	  var headers = new Headers(); // Replace instances of \r\n and \n followed by at least one space or horizontal tab with a space
 	  // https://tools.ietf.org/html/rfc7230#section-3.2
-	  var preProcessedHeaders = rawHeaders.replace(/\r?\n[\t ]+/g, ' ');
-	  preProcessedHeaders.split(/\r?\n/).forEach(function(line) {
+
+	  var preProcessedHeaders = rawHeaders.replace(/\r?\n[\t ]+/g, ' '); // Avoiding split via regex to work around a common IE11 bug with the core-js 3.6.0 regex polyfill
+	  // https://github.com/github/fetch/issues/748
+	  // https://github.com/zloirock/core-js/issues/751
+
+	  preProcessedHeaders.split('\r').map(function (header) {
+	    return header.indexOf('\n') === 0 ? header.substr(1, header.length) : header;
+	  }).forEach(function (line) {
 	    var parts = line.split(':');
 	    var key = parts.shift().trim();
+
 	    if (key) {
 	      var value = parts.join(':').trim();
 	      headers.append(key, value);
 	    }
 	  });
-	  return headers
+	  return headers;
 	}
 
 	Body.call(Request.prototype);
-
 	function Response(bodyInit, options) {
+	  if (!(this instanceof Response)) {
+	    throw new TypeError('Please use the "new" operator, this DOM object constructor cannot be called as a function.');
+	  }
+
 	  if (!options) {
 	    options = {};
 	  }
@@ -5256,58 +7012,69 @@
 	  this.type = 'default';
 	  this.status = options.status === undefined ? 200 : options.status;
 	  this.ok = this.status >= 200 && this.status < 300;
-	  this.statusText = 'statusText' in options ? options.statusText : '';
+	  this.statusText = options.statusText === undefined ? '' : '' + options.statusText;
 	  this.headers = new Headers(options.headers);
 	  this.url = options.url || '';
+
 	  this._initBody(bodyInit);
 	}
-
 	Body.call(Response.prototype);
 
-	Response.prototype.clone = function() {
+	Response.prototype.clone = function () {
 	  return new Response(this._bodyInit, {
 	    status: this.status,
 	    statusText: this.statusText,
 	    headers: new Headers(this.headers),
 	    url: this.url
-	  })
+	  });
 	};
 
-	Response.error = function() {
-	  var response = new Response(null, {status: 0, statusText: ''});
+	Response.error = function () {
+	  var response = new Response(null, {
+	    status: 0,
+	    statusText: ''
+	  });
 	  response.type = 'error';
-	  return response
+	  return response;
 	};
 
 	var redirectStatuses = [301, 302, 303, 307, 308];
 
-	Response.redirect = function(url, status) {
+	Response.redirect = function (url, status) {
 	  if (redirectStatuses.indexOf(status) === -1) {
-	    throw new RangeError('Invalid status code')
+	    throw new RangeError('Invalid status code');
 	  }
 
-	  return new Response(null, {status: status, headers: {location: url}})
+	  return new Response(null, {
+	    status: status,
+	    headers: {
+	      location: url
+	    }
+	  });
 	};
 
-	var DOMException$1 = global$1.DOMException;
+	var DOMException$1 = global$k.DOMException;
 
-	if (typeof DOMException$1 !== 'function') {
-	  DOMException$1 = function(message, name) {
+	try {
+	  new DOMException$1();
+	} catch (err) {
+	  DOMException$1 = function DOMException(message, name) {
 	    this.message = message;
 	    this.name = name;
 	    var error = Error(message);
 	    this.stack = error.stack;
 	  };
+
 	  DOMException$1.prototype = Object.create(Error.prototype);
 	  DOMException$1.prototype.constructor = DOMException$1;
 	}
 
 	function fetch$1(input, init) {
-	  return new Promise(function(resolve, reject) {
+	  return new Promise(function (resolve, reject) {
 	    var request = new Request(input, init);
 
 	    if (request.signal && request.signal.aborted) {
-	      return reject(new DOMException$1('Aborted', 'AbortError'))
+	      return reject(new DOMException$1('Aborted', 'AbortError'));
 	    }
 
 	    var xhr = new XMLHttpRequest();
@@ -5316,7 +7083,7 @@
 	      xhr.abort();
 	    }
 
-	    xhr.onload = function() {
+	    xhr.onload = function () {
 	      var options = {
 	        status: xhr.status,
 	        statusText: xhr.statusText,
@@ -5324,34 +7091,34 @@
 	      };
 	      options.url = 'responseURL' in xhr ? xhr.responseURL : options.headers.get('X-Request-URL');
 	      var body = 'response' in xhr ? xhr.response : xhr.responseText;
-	      setTimeout(function() {
+	      setTimeout(function () {
 	        resolve(new Response(body, options));
 	      }, 0);
 	    };
 
-	    xhr.onerror = function() {
-	      setTimeout(function() {
+	    xhr.onerror = function () {
+	      setTimeout(function () {
 	        reject(new TypeError('Network request failed'));
 	      }, 0);
 	    };
 
-	    xhr.ontimeout = function() {
-	      setTimeout(function() {
+	    xhr.ontimeout = function () {
+	      setTimeout(function () {
 	        reject(new TypeError('Network request failed'));
 	      }, 0);
 	    };
 
-	    xhr.onabort = function() {
-	      setTimeout(function() {
+	    xhr.onabort = function () {
+	      setTimeout(function () {
 	        reject(new DOMException$1('Aborted', 'AbortError'));
 	      }, 0);
 	    };
 
 	    function fixUrl(url) {
 	      try {
-	        return url === '' && global$1.location.href ? global$1.location.href : url
+	        return url === '' && global$k.location.href ? global$k.location.href : url;
 	      } catch (e) {
-	        return url
+	        return url;
 	      }
 	    }
 
@@ -5366,23 +7133,25 @@
 	    if ('responseType' in xhr) {
 	      if (support.blob) {
 	        xhr.responseType = 'blob';
-	      } else if (
-	        support.arrayBuffer &&
-	        request.headers.get('Content-Type') &&
-	        request.headers.get('Content-Type').indexOf('application/octet-stream') !== -1
-	      ) {
+	      } else if (support.arrayBuffer && request.headers.get('Content-Type') && request.headers.get('Content-Type').indexOf('application/octet-stream') !== -1) {
 	        xhr.responseType = 'arraybuffer';
 	      }
 	    }
 
-	    request.headers.forEach(function(value, name) {
-	      xhr.setRequestHeader(name, value);
-	    });
+	    if (init && _typeof(init.headers) === 'object' && !(init.headers instanceof Headers)) {
+	      Object.getOwnPropertyNames(init.headers).forEach(function (name) {
+	        xhr.setRequestHeader(name, normalizeValue(init.headers[name]));
+	      });
+	    } else {
+	      request.headers.forEach(function (value, name) {
+	        xhr.setRequestHeader(name, value);
+	      });
+	    }
 
 	    if (request.signal) {
 	      request.signal.addEventListener('abort', abortXhr);
 
-	      xhr.onreadystatechange = function() {
+	      xhr.onreadystatechange = function () {
 	        // DONE (success or failure)
 	        if (xhr.readyState === 4) {
 	          request.signal.removeEventListener('abort', abortXhr);
@@ -5391,153 +7160,285 @@
 	    }
 
 	    xhr.send(typeof request._bodyInit === 'undefined' ? null : request._bodyInit);
-	  })
+	  });
 	}
-
 	fetch$1.polyfill = true;
 
-	if (!global$1.fetch) {
-	  global$1.fetch = fetch$1;
-	  global$1.Headers = Headers;
-	  global$1.Request = Request;
-	  global$1.Response = Response;
+	if (!global$k.fetch) {
+	  global$k.fetch = fetch$1;
+	  global$k.Headers = Headers;
+	  global$k.Request = Request;
+	  global$k.Response = Response;
 	}
 
-	var lib = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
+	var $$T = _export;
+	var DESCRIPTORS$9 = descriptors;
+	var defineProperty$5 = objectDefineProperty.f;
 
+	// `Object.defineProperty` method
+	// https://tc39.es/ecma262/#sec-object.defineproperty
+	// eslint-disable-next-line es/no-object-defineproperty -- safe
+	$$T({ target: 'Object', stat: true, forced: Object.defineProperty !== defineProperty$5, sham: !DESCRIPTORS$9 }, {
+	  defineProperty: defineProperty$5
+	});
 
+	var $$S = _export;
+	var setPrototypeOf = objectSetPrototypeOf;
 
+	// `Object.setPrototypeOf` method
+	// https://tc39.es/ecma262/#sec-object.setprototypeof
+	$$S({ target: 'Object', stat: true }, {
+	  setPrototypeOf: setPrototypeOf
+	});
 
+	var $$R = _export;
+	var fails$n = fails$V;
+	var toObject$8 = toObject$i;
+	var nativeGetPrototypeOf = objectGetPrototypeOf;
+	var CORRECT_PROTOTYPE_GETTER = correctPrototypeGetter;
 
+	var FAILS_ON_PRIMITIVES$4 = fails$n(function () { nativeGetPrototypeOf(1); });
 
+	// `Object.getPrototypeOf` method
+	// https://tc39.es/ecma262/#sec-object.getprototypeof
+	$$R({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$4, sham: !CORRECT_PROTOTYPE_GETTER }, {
+	  getPrototypeOf: function getPrototypeOf(it) {
+	    return nativeGetPrototypeOf(toObject$8(it));
+	  }
+	});
 
+	var global$j = global$1o;
+	var uncurryThis$m = functionUncurryThis;
+	var aCallable$2 = aCallable$a;
+	var isObject$b = isObject$s;
+	var hasOwn$5 = hasOwnProperty_1;
+	var arraySlice$2 = arraySlice$b;
+	var NATIVE_BIND = functionBindNative;
+
+	var Function$1 = global$j.Function;
+	var concat$1 = uncurryThis$m([].concat);
+	var join$3 = uncurryThis$m([].join);
+	var factories = {};
+
+	var construct = function (C, argsLength, args) {
+	  if (!hasOwn$5(factories, argsLength)) {
+	    for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']';
+	    factories[argsLength] = Function$1('C,a', 'return new C(' + join$3(list, ',') + ')');
+	  } return factories[argsLength](C, args);
+	};
+
+	// `Function.prototype.bind` method implementation
+	// https://tc39.es/ecma262/#sec-function.prototype.bind
+	var functionBind = NATIVE_BIND ? Function$1.bind : function bind(that /* , ...args */) {
+	  var F = aCallable$2(this);
+	  var Prototype = F.prototype;
+	  var partArgs = arraySlice$2(arguments, 1);
+	  var boundFunction = function bound(/* args... */) {
+	    var args = concat$1(partArgs, arraySlice$2(arguments));
+	    return this instanceof boundFunction ? construct(F, args.length, args) : F.apply(that, args);
+	  };
+	  if (isObject$b(Prototype)) boundFunction.prototype = Prototype;
+	  return boundFunction;
+	};
+
+	var $$Q = _export;
+	var getBuiltIn$1 = getBuiltIn$b;
+	var apply = functionApply;
+	var bind$7 = functionBind;
+	var aConstructor = aConstructor$3;
+	var anObject$4 = anObject$n;
+	var isObject$a = isObject$s;
+	var create$4 = objectCreate;
+	var fails$m = fails$V;
+
+	var nativeConstruct = getBuiltIn$1('Reflect', 'construct');
+	var ObjectPrototype = Object.prototype;
+	var push$4 = [].push;
+
+	// `Reflect.construct` method
+	// https://tc39.es/ecma262/#sec-reflect.construct
+	// MS Edge supports only 2 arguments and argumentsList argument is optional
+	// FF Nightly sets third argument as `new.target`, but does not create `this` from it
+	var NEW_TARGET_BUG = fails$m(function () {
+	  function F() { /* empty */ }
+	  return !(nativeConstruct(function () { /* empty */ }, [], F) instanceof F);
+	});
 
-	if (!window.Set) {
-	    window.Set = es6Set;
-	}
-	if (!window.Map) {
-	    window.Map = es6Map;
-	}
-	if (!window.Promise) {
-	    window.Promise = polyfill$e;
-	    window.Promise._immediateFn = setAsap;
-	}
-	if (!Array.prototype.find) {
-	    array_prototype_find.shim();
-	}
-	if (!Array.prototype.findIndex) {
-	    array_prototype_findindex.shim();
-	}
-	if (!Array.from) {
-	    array_from.shim();
-	}
-	if (!Object.values) {
-	    object_values.shim();
-	}
-	if (!Object.assign) {
-	    object_assign.shim();
-	}
-	if (!window.requestAnimationFrame || !window.cancelAnimationFrame) {
-	    window.requestAnimationFrame = raf_1;
-	    window.cancelAnimationFrame = raf_1.cancel;
-	}
+	var ARGS_BUG = !fails$m(function () {
+	  nativeConstruct(function () { /* empty */ });
+	});
 
-	var finalFetch = window.fetch;
-	var finalPromise = window.Promise;
-	window.fetch = function (input, init) {
-	    try {
-	        return finalFetch(input, init);
-	    }
-	    catch (error) {
-	        return new finalPromise(function (_, reject) { return reject(error); });
+	var FORCED$c = NEW_TARGET_BUG || ARGS_BUG;
+
+	$$Q({ target: 'Reflect', stat: true, forced: FORCED$c, sham: FORCED$c }, {
+	  construct: function construct(Target, args /* , newTarget */) {
+	    aConstructor(Target);
+	    anObject$4(args);
+	    var newTarget = arguments.length < 3 ? Target : aConstructor(arguments[2]);
+	    if (ARGS_BUG && !NEW_TARGET_BUG) return nativeConstruct(Target, args, newTarget);
+	    if (Target == newTarget) {
+	      // w/o altered newTarget, optimization for 0-4 arguments
+	      switch (args.length) {
+	        case 0: return new Target();
+	        case 1: return new Target(args[0]);
+	        case 2: return new Target(args[0], args[1]);
+	        case 3: return new Target(args[0], args[1], args[2]);
+	        case 4: return new Target(args[0], args[1], args[2], args[3]);
+	      }
+	      // w/o altered newTarget, lot of arguments case
+	      var $args = [null];
+	      apply(push$4, $args, args);
+	      return new (apply(bind$7, Target, $args))();
 	    }
-	};
+	    // with altered newTarget, not support built-in constructors
+	    var proto = newTarget.prototype;
+	    var instance = create$4(isObject$a(proto) ? proto : ObjectPrototype);
+	    var result = apply(Target, instance, args);
+	    return isObject$a(result) ? result : instance;
+	  }
 	});
 
-	var $Math$2 = GetIntrinsic('%Math%');
+	var hasOwn$4 = hasOwnProperty_1;
 
-	var $floor$1 = $Math$2.floor;
-	var $abs$1 = $Math$2.abs;
+	var isDataDescriptor$1 = function (descriptor) {
+	  return descriptor !== undefined && (hasOwn$4(descriptor, 'value') || hasOwn$4(descriptor, 'writable'));
+	};
 
+	var $$P = _export;
+	var call$5 = functionCall;
+	var isObject$9 = isObject$s;
+	var anObject$3 = anObject$n;
+	var isDataDescriptor = isDataDescriptor$1;
+	var getOwnPropertyDescriptorModule = objectGetOwnPropertyDescriptor;
+	var getPrototypeOf = objectGetPrototypeOf;
 
+	// `Reflect.get` method
+	// https://tc39.es/ecma262/#sec-reflect.get
+	function get$3(target, propertyKey /* , receiver */) {
+	  var receiver = arguments.length < 3 ? target : arguments[2];
+	  var descriptor, prototype;
+	  if (anObject$3(target) === receiver) return target[propertyKey];
+	  descriptor = getOwnPropertyDescriptorModule.f(target, propertyKey);
+	  if (descriptor) return isDataDescriptor(descriptor)
+	    ? descriptor.value
+	    : descriptor.get === undefined ? undefined : call$5(descriptor.get, receiver);
+	  if (isObject$9(prototype = getPrototypeOf(target))) return get$3(prototype, propertyKey, receiver);
+	}
 
+	$$P({ target: 'Reflect', stat: true }, {
+	  get: get$3
+	});
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isinteger
+	var $$O = _export;
+	var fails$l = fails$V;
+	var toIndexedObject$1 = toIndexedObject$d;
+	var nativeGetOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+	var DESCRIPTORS$8 = descriptors;
 
-	var IsInteger = function IsInteger(argument) {
-		if (typeof argument !== 'number' || _isNaN(argument) || !_isFinite(argument)) {
-			return false;
-		}
-		var abs = $abs$1(argument);
-		return $floor$1(abs) === abs;
-	};
+	var FAILS_ON_PRIMITIVES$3 = fails$l(function () { nativeGetOwnPropertyDescriptor(1); });
+	var FORCED$b = !DESCRIPTORS$8 || FAILS_ON_PRIMITIVES$3;
 
-	var ArrayPush = callBound('Array.prototype.push');
-	var StringFromCharCodeSpread = callBind.apply(String.fromCharCode, null);
-
-	var implementation$8 = function fromCodePoint(_ /* fromCodePoint.length is 1 */) {
-		var arguments$1 = arguments;
-
-		var MAX_SIZE = 0x4000;
-		var codeUnits = [];
-		var highSurrogate;
-		var lowSurrogate;
-		var index = -1;
-		var length = arguments.length;
-		if (!length) {
-			return '';
-		}
-		var result = '';
-		while (++index < length) {
-			var codePoint = ToNumber$1(arguments$1[index]);
-			if (
-				!IsInteger(codePoint) ||
-				codePoint < 0 || codePoint > 0x10FFFF // not a valid Unicode code point
-			) {
-				throw RangeError('Invalid code point: ' + codePoint);
-			}
-			if (codePoint <= 0xFFFF) { // BMP code point
-				ArrayPush(codeUnits, codePoint);
-			} else { // Astral code point; split in surrogate halves
-				// https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
-				codePoint -= 0x10000;
-				highSurrogate = (codePoint >> 10) + 0xD800;
-				lowSurrogate = (codePoint % 0x400) + 0xDC00;
-				ArrayPush(codeUnits, highSurrogate, lowSurrogate);
-			}
-			if (index + 1 == length || codeUnits.length > MAX_SIZE) {
-				result += StringFromCharCodeSpread(codeUnits);
-				codeUnits.length = 0;
-			}
-		}
-		return result;
-	};
+	// `Object.getOwnPropertyDescriptor` method
+	// https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
+	$$O({ target: 'Object', stat: true, forced: FORCED$b, sham: !DESCRIPTORS$8 }, {
+	  getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {
+	    return nativeGetOwnPropertyDescriptor(toIndexedObject$1(it), key);
+	  }
+	});
 
-	var polyfill$g = function getPolyfill() {
-		return String.fromCodePoint || implementation$8;
-	};
+	var $$N = _export;
+	var global$i = global$1o;
+	var toAbsoluteIndex$1 = toAbsoluteIndex$9;
+	var toIntegerOrInfinity$2 = toIntegerOrInfinity$b;
+	var lengthOfArrayLike$5 = lengthOfArrayLike$i;
+	var toObject$7 = toObject$i;
+	var arraySpeciesCreate$2 = arraySpeciesCreate$4;
+	var createProperty$2 = createProperty$5;
+	var arrayMethodHasSpeciesSupport$2 = arrayMethodHasSpeciesSupport$5;
+
+	var HAS_SPECIES_SUPPORT$1 = arrayMethodHasSpeciesSupport$2('splice');
+
+	var TypeError$6 = global$i.TypeError;
+	var max$1 = Math.max;
+	var min$3 = Math.min;
+	var MAX_SAFE_INTEGER$1 = 0x1FFFFFFFFFFFFF;
+	var MAXIMUM_ALLOWED_LENGTH_EXCEEDED = 'Maximum allowed length exceeded';
+
+	// `Array.prototype.splice` method
+	// https://tc39.es/ecma262/#sec-array.prototype.splice
+	// with adding support of @@species
+	$$N({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$1 }, {
+	  splice: function splice(start, deleteCount /* , ...items */) {
+	    var O = toObject$7(this);
+	    var len = lengthOfArrayLike$5(O);
+	    var actualStart = toAbsoluteIndex$1(start, len);
+	    var argumentsLength = arguments.length;
+	    var insertCount, actualDeleteCount, A, k, from, to;
+	    if (argumentsLength === 0) {
+	      insertCount = actualDeleteCount = 0;
+	    } else if (argumentsLength === 1) {
+	      insertCount = 0;
+	      actualDeleteCount = len - actualStart;
+	    } else {
+	      insertCount = argumentsLength - 2;
+	      actualDeleteCount = min$3(max$1(toIntegerOrInfinity$2(deleteCount), 0), len - actualStart);
+	    }
+	    if (len + insertCount - actualDeleteCount > MAX_SAFE_INTEGER$1) {
+	      throw TypeError$6(MAXIMUM_ALLOWED_LENGTH_EXCEEDED);
+	    }
+	    A = arraySpeciesCreate$2(O, actualDeleteCount);
+	    for (k = 0; k < actualDeleteCount; k++) {
+	      from = actualStart + k;
+	      if (from in O) createProperty$2(A, k, O[from]);
+	    }
+	    A.length = actualDeleteCount;
+	    if (insertCount < actualDeleteCount) {
+	      for (k = actualStart; k < len - actualDeleteCount; k++) {
+	        from = k + actualDeleteCount;
+	        to = k + insertCount;
+	        if (from in O) O[to] = O[from];
+	        else delete O[to];
+	      }
+	      for (k = len; k > len - actualDeleteCount + insertCount; k--) delete O[k - 1];
+	    } else if (insertCount > actualDeleteCount) {
+	      for (k = len - actualDeleteCount; k > actualStart; k--) {
+	        from = k + actualDeleteCount - 1;
+	        to = k + insertCount - 1;
+	        if (from in O) O[to] = O[from];
+	        else delete O[to];
+	      }
+	    }
+	    for (k = 0; k < insertCount; k++) {
+	      O[k + actualStart] = arguments[k + 2];
+	    }
+	    O.length = len - actualDeleteCount + insertCount;
+	    return A;
+	  }
+	});
 
-	var shim$d = function shimFromCodePoint() {
-		var polyfill = polyfill$g();
+	var defineWellKnownSymbol$1 = defineWellKnownSymbol$4;
 
-		if (String.fromCodePoint !== polyfill) {
-			defineProperties_1(String, { fromCodePoint: polyfill });
-		}
+	// `Symbol.toStringTag` well-known symbol
+	// https://tc39.es/ecma262/#sec-symbol.tostringtag
+	defineWellKnownSymbol$1('toStringTag');
 
-		return polyfill;
-	};
+	var global$h = global$1o;
+	var setToStringTag$3 = setToStringTag$a;
+
+	// JSON[@@toStringTag] property
+	// https://tc39.es/ecma262/#sec-json-@@tostringtag
+	setToStringTag$3(global$h.JSON, 'JSON', true);
 
-	/*! https://mths.be/fromcodepoint v1.0.0 by @mathias */
+	var setToStringTag$2 = setToStringTag$a;
 
-	shim$d();
+	// Math[@@toStringTag] property
+	// https://tc39.es/ecma262/#sec-math-@@tostringtag
+	setToStringTag$2(Math, 'Math', true);
 
 	(function (factory) {
-	  
 	  factory();
-	}((function () {
+	})(function () {
+
 	  function _classCallCheck(instance, Constructor) {
 	    if (!(instance instanceof Constructor)) {
 	      throw new TypeError("Cannot call a class as a function");
@@ -5549,14 +7450,14 @@
 	      var descriptor = props[i];
 	      descriptor.enumerable = descriptor.enumerable || false;
 	      descriptor.configurable = true;
-	      if ("value" in descriptor) { descriptor.writable = true; }
+	      if ("value" in descriptor) descriptor.writable = true;
 	      Object.defineProperty(target, descriptor.key, descriptor);
 	    }
 	  }
 
 	  function _createClass(Constructor, protoProps, staticProps) {
-	    if (protoProps) { _defineProperties(Constructor.prototype, protoProps); }
-	    if (staticProps) { _defineProperties(Constructor, staticProps); }
+	    if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+	    if (staticProps) _defineProperties(Constructor, staticProps);
 	    return Constructor;
 	  }
 
@@ -5572,7 +7473,7 @@
 	        configurable: true
 	      }
 	    });
-	    if (superClass) { _setPrototypeOf(subClass, superClass); }
+	    if (superClass) _setPrototypeOf(subClass, superClass);
 	  }
 
 	  function _getPrototypeOf(o) {
@@ -5591,6 +7492,19 @@
 	    return _setPrototypeOf(o, p);
 	  }
 
+	  function _isNativeReflectConstruct() {
+	    if (typeof Reflect === "undefined" || !Reflect.construct) return false;
+	    if (Reflect.construct.sham) return false;
+	    if (typeof Proxy === "function") return true;
+
+	    try {
+	      Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
+	      return true;
+	    } catch (e) {
+	      return false;
+	    }
+	  }
+
 	  function _assertThisInitialized(self) {
 	    if (self === void 0) {
 	      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
@@ -5600,17 +7514,36 @@
 	  }
 
 	  function _possibleConstructorReturn(self, call) {
-	    if (call && (typeof call === "object" || typeof call === "function")) {
+	    if (call && (_typeof(call) === "object" || typeof call === "function")) {
 	      return call;
 	    }
 
 	    return _assertThisInitialized(self);
 	  }
 
+	  function _createSuper(Derived) {
+	    var hasNativeReflectConstruct = _isNativeReflectConstruct();
+
+	    return function _createSuperInternal() {
+	      var Super = _getPrototypeOf(Derived),
+	          result;
+
+	      if (hasNativeReflectConstruct) {
+	        var NewTarget = _getPrototypeOf(this).constructor;
+
+	        result = Reflect.construct(Super, arguments, NewTarget);
+	      } else {
+	        result = Super.apply(this, arguments);
+	      }
+
+	      return _possibleConstructorReturn(this, result);
+	    };
+	  }
+
 	  function _superPropBase(object, property) {
 	    while (!Object.prototype.hasOwnProperty.call(object, property)) {
 	      object = _getPrototypeOf(object);
-	      if (object === null) { break; }
+	      if (object === null) break;
 	    }
 
 	    return object;
@@ -5623,7 +7556,7 @@
 	      _get = function _get(target, property, receiver) {
 	        var base = _superPropBase(target, property);
 
-	        if (!base) { return; }
+	        if (!base) return;
 	        var desc = Object.getOwnPropertyDescriptor(base, property);
 
 	        if (desc.get) {
@@ -5637,9 +7570,7 @@
 	    return _get(target, property, receiver || target);
 	  }
 
-	  var Emitter =
-	  /*#__PURE__*/
-	  function () {
+	  var Emitter = /*#__PURE__*/function () {
 	    function Emitter() {
 	      _classCallCheck(this, Emitter);
 
@@ -5652,12 +7583,15 @@
 
 	    _createClass(Emitter, [{
 	      key: "addEventListener",
-	      value: function addEventListener(type, callback) {
+	      value: function addEventListener(type, callback, options) {
 	        if (!(type in this.listeners)) {
 	          this.listeners[type] = [];
 	        }
 
-	        this.listeners[type].push(callback);
+	        this.listeners[type].push({
+	          callback: callback,
+	          options: options
+	        });
 	      }
 	    }, {
 	      key: "removeEventListener",
@@ -5669,7 +7603,7 @@
 	        var stack = this.listeners[type];
 
 	        for (var i = 0, l = stack.length; i < l; i++) {
-	          if (stack[i] === callback) {
+	          if (stack[i].callback === callback) {
 	            stack.splice(i, 1);
 	            return;
 	          }
@@ -5678,22 +7612,27 @@
 	    }, {
 	      key: "dispatchEvent",
 	      value: function dispatchEvent(event) {
-	        var _this = this;
-
 	        if (!(event.type in this.listeners)) {
 	          return;
 	        }
 
-	        var debounce = function debounce(callback) {
-	          setTimeout(function () {
-	            return callback.call(_this, event);
-	          });
-	        };
-
 	        var stack = this.listeners[event.type];
+	        var stackToCall = stack.slice();
 
-	        for (var i = 0, l = stack.length; i < l; i++) {
-	          debounce(stack[i]);
+	        for (var i = 0, l = stackToCall.length; i < l; i++) {
+	          var listener = stackToCall[i];
+
+	          try {
+	            listener.callback.call(this, event);
+	          } catch (e) {
+	            Promise.resolve().then(function () {
+	              throw e;
+	            });
+	          }
+
+	          if (listener.options && listener.options.once) {
+	            this.removeEventListener(event.type, listener.callback);
+	          }
 	        }
 
 	        return !event.defaultPrevented;
@@ -5703,40 +7642,40 @@
 	    return Emitter;
 	  }();
 
-	  var AbortSignal =
-	  /*#__PURE__*/
-	  function (_Emitter) {
+	  var AbortSignal = /*#__PURE__*/function (_Emitter) {
 	    _inherits(AbortSignal, _Emitter);
 
+	    var _super = _createSuper(AbortSignal);
+
 	    function AbortSignal() {
-	      var _this2;
+	      var _this;
 
 	      _classCallCheck(this, AbortSignal);
 
-	      _this2 = _possibleConstructorReturn(this, _getPrototypeOf(AbortSignal).call(this)); // Some versions of babel does not transpile super() correctly for IE <= 10, if the parent
+	      _this = _super.call(this); // Some versions of babel does not transpile super() correctly for IE <= 10, if the parent
 	      // constructor has failed to run, then "this.listeners" will still be undefined and then we call
 	      // the parent constructor directly instead as a workaround. For general details, see babel bug:
 	      // https://github.com/babel/babel/issues/3041
 	      // This hack was added as a fix for the issue described here:
 	      // https://github.com/Financial-Times/polyfill-library/pull/59#issuecomment-477558042
 
-	      if (!_this2.listeners) {
-	        Emitter.call(_assertThisInitialized(_this2));
+	      if (!_this.listeners) {
+	        Emitter.call(_assertThisInitialized(_this));
 	      } // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
 	      // we want Object.keys(new AbortController().signal) to be [] for compat with the native impl
 
 
-	      Object.defineProperty(_assertThisInitialized(_this2), 'aborted', {
+	      Object.defineProperty(_assertThisInitialized(_this), 'aborted', {
 	        value: false,
 	        writable: true,
 	        configurable: true
 	      });
-	      Object.defineProperty(_assertThisInitialized(_this2), 'onabort', {
+	      Object.defineProperty(_assertThisInitialized(_this), 'onabort', {
 	        value: null,
 	        writable: true,
 	        configurable: true
 	      });
-	      return _this2;
+	      return _this;
 	    }
 
 	    _createClass(AbortSignal, [{
@@ -5761,14 +7700,13 @@
 
 	    return AbortSignal;
 	  }(Emitter);
-	  var AbortController =
-	  /*#__PURE__*/
-	  function () {
-	    function AbortController() {
-	      _classCallCheck(this, AbortController);
 
-	      // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
+	  var AbortController = /*#__PURE__*/function () {
+	    function AbortController() {
+	      _classCallCheck(this, AbortController); // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
 	      // we want Object.keys(new AbortController()) to be [] for compat with the native impl
+
+
 	      Object.defineProperty(this, 'signal', {
 	        value: new AbortSignal(),
 	        writable: true,
@@ -5838,7 +7776,6 @@
 
 	    return typeof self.Request === 'function' && !self.Request.prototype.hasOwnProperty('signal') || !self.AbortController;
 	  }
-
 	  /**
 	   * Note: the "fetch.Request" default value is available for fetch imported from
 	   * the "node-fetch" package and not in browsers. This is OK since browsers
@@ -5853,6 +7790,7 @@
 	   * @returns {fetch: abortableFetch, Request: AbortableRequest}
 	   */
 
+
 	  function abortableFetchDecorator(patchTargets) {
 	    if ('function' === typeof patchTargets) {
 	      patchTargets = {
@@ -5979,7 +7917,6 @@
 	  }
 
 	  (function (self) {
-
 	    if (!polyfillNeeded(self)) {
 	      return;
 	    }
@@ -6008,14 +7945,224 @@
 	      value: AbortSignal
 	    });
 	  })(typeof self !== 'undefined' ? self : commonjsGlobal);
-
-	})));
+	});
 
 	function actionAddEntity(way) {
-	    return function(graph) {
-	        return graph.replace(way);
-	    };
-	}
+	  return function (graph) {
+	    return graph.replace(way);
+	  };
+	}
+
+	var $$M = _export;
+	var global$g = global$1o;
+	var fails$k = fails$V;
+	var isArray$3 = isArray$8;
+	var isObject$8 = isObject$s;
+	var toObject$6 = toObject$i;
+	var lengthOfArrayLike$4 = lengthOfArrayLike$i;
+	var createProperty$1 = createProperty$5;
+	var arraySpeciesCreate$1 = arraySpeciesCreate$4;
+	var arrayMethodHasSpeciesSupport$1 = arrayMethodHasSpeciesSupport$5;
+	var wellKnownSymbol$2 = wellKnownSymbol$t;
+	var V8_VERSION = engineV8Version;
+
+	var IS_CONCAT_SPREADABLE = wellKnownSymbol$2('isConcatSpreadable');
+	var MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;
+	var MAXIMUM_ALLOWED_INDEX_EXCEEDED = 'Maximum allowed index exceeded';
+	var TypeError$5 = global$g.TypeError;
+
+	// We can't use this feature detection in V8 since it causes
+	// deoptimization and serious performance degradation
+	// https://github.com/zloirock/core-js/issues/679
+	var IS_CONCAT_SPREADABLE_SUPPORT = V8_VERSION >= 51 || !fails$k(function () {
+	  var array = [];
+	  array[IS_CONCAT_SPREADABLE] = false;
+	  return array.concat()[0] !== array;
+	});
+
+	var SPECIES_SUPPORT = arrayMethodHasSpeciesSupport$1('concat');
+
+	var isConcatSpreadable = function (O) {
+	  if (!isObject$8(O)) return false;
+	  var spreadable = O[IS_CONCAT_SPREADABLE];
+	  return spreadable !== undefined ? !!spreadable : isArray$3(O);
+	};
+
+	var FORCED$a = !IS_CONCAT_SPREADABLE_SUPPORT || !SPECIES_SUPPORT;
+
+	// `Array.prototype.concat` method
+	// https://tc39.es/ecma262/#sec-array.prototype.concat
+	// with adding support of @@isConcatSpreadable and @@species
+	$$M({ target: 'Array', proto: true, forced: FORCED$a }, {
+	  // eslint-disable-next-line no-unused-vars -- required for `.length`
+	  concat: function concat(arg) {
+	    var O = toObject$6(this);
+	    var A = arraySpeciesCreate$1(O, 0);
+	    var n = 0;
+	    var i, k, length, len, E;
+	    for (i = -1, length = arguments.length; i < length; i++) {
+	      E = i === -1 ? O : arguments[i];
+	      if (isConcatSpreadable(E)) {
+	        len = lengthOfArrayLike$4(E);
+	        if (n + len > MAX_SAFE_INTEGER) throw TypeError$5(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
+	        for (k = 0; k < len; k++, n++) if (k in E) createProperty$1(A, n, E[k]);
+	      } else {
+	        if (n >= MAX_SAFE_INTEGER) throw TypeError$5(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
+	        createProperty$1(A, n++, E);
+	      }
+	    }
+	    A.length = n;
+	    return A;
+	  }
+	});
+
+	var DESCRIPTORS$7 = descriptors;
+	var uncurryThis$l = functionUncurryThis;
+	var call$4 = functionCall;
+	var fails$j = fails$V;
+	var objectKeys$1 = objectKeys$4;
+	var getOwnPropertySymbolsModule = objectGetOwnPropertySymbols;
+	var propertyIsEnumerableModule = objectPropertyIsEnumerable;
+	var toObject$5 = toObject$i;
+	var IndexedObject = indexedObject;
+
+	// eslint-disable-next-line es/no-object-assign -- safe
+	var $assign = Object.assign;
+	// eslint-disable-next-line es/no-object-defineproperty -- required for testing
+	var defineProperty$4 = Object.defineProperty;
+	var concat = uncurryThis$l([].concat);
+
+	// `Object.assign` method
+	// https://tc39.es/ecma262/#sec-object.assign
+	var objectAssign = !$assign || fails$j(function () {
+	  // should have correct order of operations (Edge bug)
+	  if (DESCRIPTORS$7 && $assign({ b: 1 }, $assign(defineProperty$4({}, 'a', {
+	    enumerable: true,
+	    get: function () {
+	      defineProperty$4(this, 'b', {
+	        value: 3,
+	        enumerable: false
+	      });
+	    }
+	  }), { b: 2 })).b !== 1) return true;
+	  // should work with symbols and should have deterministic property order (V8 bug)
+	  var A = {};
+	  var B = {};
+	  // eslint-disable-next-line es/no-symbol -- safe
+	  var symbol = Symbol();
+	  var alphabet = 'abcdefghijklmnopqrst';
+	  A[symbol] = 7;
+	  alphabet.split('').forEach(function (chr) { B[chr] = chr; });
+	  return $assign({}, A)[symbol] != 7 || objectKeys$1($assign({}, B)).join('') != alphabet;
+	}) ? function assign(target, source) { // eslint-disable-line no-unused-vars -- required for `.length`
+	  var T = toObject$5(target);
+	  var argumentsLength = arguments.length;
+	  var index = 1;
+	  var getOwnPropertySymbols = getOwnPropertySymbolsModule.f;
+	  var propertyIsEnumerable = propertyIsEnumerableModule.f;
+	  while (argumentsLength > index) {
+	    var S = IndexedObject(arguments[index++]);
+	    var keys = getOwnPropertySymbols ? concat(objectKeys$1(S), getOwnPropertySymbols(S)) : objectKeys$1(S);
+	    var length = keys.length;
+	    var j = 0;
+	    var key;
+	    while (length > j) {
+	      key = keys[j++];
+	      if (!DESCRIPTORS$7 || call$4(propertyIsEnumerable, S, key)) T[key] = S[key];
+	    }
+	  } return T;
+	} : $assign;
+
+	var $$L = _export;
+	var assign$2 = objectAssign;
+
+	// `Object.assign` method
+	// https://tc39.es/ecma262/#sec-object.assign
+	// eslint-disable-next-line es/no-object-assign -- required for testing
+	$$L({ target: 'Object', stat: true, forced: Object.assign !== assign$2 }, {
+	  assign: assign$2
+	});
+
+	var $$K = _export;
+	var $filter = arrayIteration.filter;
+	var arrayMethodHasSpeciesSupport = arrayMethodHasSpeciesSupport$5;
+
+	var HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('filter');
+
+	// `Array.prototype.filter` method
+	// https://tc39.es/ecma262/#sec-array.prototype.filter
+	// with adding support of @@species
+	$$K({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT }, {
+	  filter: function filter(callbackfn /* , thisArg */) {
+	    return $filter(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
+
+	var $$J = _export;
+	var toObject$4 = toObject$i;
+	var nativeKeys = objectKeys$4;
+	var fails$i = fails$V;
+
+	var FAILS_ON_PRIMITIVES$2 = fails$i(function () { nativeKeys(1); });
+
+	// `Object.keys` method
+	// https://tc39.es/ecma262/#sec-object.keys
+	$$J({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$2 }, {
+	  keys: function keys(it) {
+	    return nativeKeys(toObject$4(it));
+	  }
+	});
+
+	var $$I = _export;
+	var uncurryThis$k = functionUncurryThis;
+	var isArray$2 = isArray$8;
+
+	var un$Reverse = uncurryThis$k([].reverse);
+	var test$1 = [1, 2];
+
+	// `Array.prototype.reverse` method
+	// https://tc39.es/ecma262/#sec-array.prototype.reverse
+	// fix for Safari 12.0 bug
+	// https://bugs.webkit.org/show_bug.cgi?id=188794
+	$$I({ target: 'Array', proto: true, forced: String(test$1) === String(test$1.reverse()) }, {
+	  reverse: function reverse() {
+	    // eslint-disable-next-line no-self-assign -- dirty hack
+	    if (isArray$2(this)) this.length = this.length;
+	    return un$Reverse(this);
+	  }
+	});
+
+	var global$f = global$1o;
+	var fails$h = fails$V;
+	var uncurryThis$j = functionUncurryThis;
+	var toString$c = toString$k;
+	var trim$4 = stringTrim.trim;
+	var whitespaces$1 = whitespaces$4;
+
+	var charAt$2 = uncurryThis$j(''.charAt);
+	var n$ParseFloat = global$f.parseFloat;
+	var Symbol$2 = global$f.Symbol;
+	var ITERATOR$1 = Symbol$2 && Symbol$2.iterator;
+	var FORCED$9 = 1 / n$ParseFloat(whitespaces$1 + '-0') !== -Infinity
+	  // MS Edge 18- broken with boxed symbols
+	  || (ITERATOR$1 && !fails$h(function () { n$ParseFloat(Object(ITERATOR$1)); }));
+
+	// `parseFloat` method
+	// https://tc39.es/ecma262/#sec-parsefloat-string
+	var numberParseFloat = FORCED$9 ? function parseFloat(string) {
+	  var trimmedString = trim$4(toString$c(string));
+	  var result = n$ParseFloat(trimmedString);
+	  return result === 0 && charAt$2(trimmedString, 0) == '-' ? -0 : result;
+	} : n$ParseFloat;
+
+	var $$H = _export;
+	var $parseFloat = numberParseFloat;
+
+	// `parseFloat` method
+	// https://tc39.es/ecma262/#sec-parsefloat-string
+	$$H({ global: true, forced: parseFloat != $parseFloat }, {
+	  parseFloat: $parseFloat
+	});
 
 	/*
 	Order the nodes of a way in reverse order and reverse any direction dependent tags
@@ -6037,2098 +8184,2586 @@
 	    http://wiki.openstreetmap.org/wiki/Key:traffic_sign#On_a_way_or_area
 	*/
 	function actionReverse(entityID, options) {
-	    var ignoreKey = /^.*(_|:)?(description|name|note|website|ref|source|comment|watch|attribution)(_|:)?/;
-	    var numeric = /^([+\-]?)(?=[\d.])/;
-	    var directionKey = /direction$/;
-	    var turn_lanes = /^turn:lanes:?/;
-	    var keyReplacements = [
-	        [/:right$/, ':left'],
-	        [/:left$/, ':right'],
-	        [/:forward$/, ':backward'],
-	        [/:backward$/, ':forward'],
-	        [/:right:/, ':left:'],
-	        [/:left:/, ':right:'],
-	        [/:forward:/, ':backward:'],
-	        [/:backward:/, ':forward:']
-	    ];
-	    var valueReplacements = {
-	        left: 'right',
-	        right: 'left',
-	        up: 'down',
-	        down: 'up',
-	        forward: 'backward',
-	        backward: 'forward',
-	        forwards: 'backward',
-	        backwards: 'forward',
-	    };
-	    var roleReplacements = {
-	        forward: 'backward',
-	        backward: 'forward',
-	        forwards: 'backward',
-	        backwards: 'forward'
-	    };
-	    var onewayReplacements = {
-	        yes: '-1',
-	        '1': '-1',
-	        '-1': 'yes'
-	    };
+	  var ignoreKey = /^.*(_|:)?(description|name|note|website|ref|source|comment|watch|attribution)(_|:)?/;
+	  var numeric = /^([+\-]?)(?=[\d.])/;
+	  var directionKey = /direction$/;
+	  var turn_lanes = /^turn:lanes:?/;
+	  var keyReplacements = [[/:right$/, ':left'], [/:left$/, ':right'], [/:forward$/, ':backward'], [/:backward$/, ':forward'], [/:right:/, ':left:'], [/:left:/, ':right:'], [/:forward:/, ':backward:'], [/:backward:/, ':forward:']];
+	  var valueReplacements = {
+	    left: 'right',
+	    right: 'left',
+	    up: 'down',
+	    down: 'up',
+	    forward: 'backward',
+	    backward: 'forward',
+	    forwards: 'backward',
+	    backwards: 'forward'
+	  };
+	  var roleReplacements = {
+	    forward: 'backward',
+	    backward: 'forward',
+	    forwards: 'backward',
+	    backwards: 'forward'
+	  };
+	  var onewayReplacements = {
+	    yes: '-1',
+	    '1': '-1',
+	    '-1': 'yes'
+	  };
+	  var compassReplacements = {
+	    N: 'S',
+	    NNE: 'SSW',
+	    NE: 'SW',
+	    ENE: 'WSW',
+	    E: 'W',
+	    ESE: 'WNW',
+	    SE: 'NW',
+	    SSE: 'NNW',
+	    S: 'N',
+	    SSW: 'NNE',
+	    SW: 'NE',
+	    WSW: 'ENE',
+	    W: 'E',
+	    WNW: 'ESE',
+	    NW: 'SE',
+	    NNW: 'SSE'
+	  };
+
+	  function reverseKey(key) {
+	    for (var i = 0; i < keyReplacements.length; ++i) {
+	      var replacement = keyReplacements[i];
+
+	      if (replacement[0].test(key)) {
+	        return key.replace(replacement[0], replacement[1]);
+	      }
+	    }
 
-	    var compassReplacements = {
-	        N: 'S',
-	        NNE: 'SSW',
-	        NE: 'SW',
-	        ENE: 'WSW',
-	        E: 'W',
-	        ESE: 'WNW',
-	        SE: 'NW',
-	        SSE: 'NNW',
-	        S: 'N',
-	        SSW: 'NNE',
-	        SW: 'NE',
-	        WSW: 'ENE',
-	        W: 'E',
-	        WNW: 'ESE',
-	        NW: 'SE',
-	        NNW: 'SSE'
-	    };
+	    return key;
+	  }
 
+	  function reverseValue(key, value, includeAbsolute) {
+	    if (ignoreKey.test(key)) return value; // Turn lanes are left/right to key (not way) direction - #5674
 
-	    function reverseKey(key) {
-	        for (var i = 0; i < keyReplacements.length; ++i) {
-	            var replacement = keyReplacements[i];
-	            if (replacement[0].test(key)) {
-	                return key.replace(replacement[0], replacement[1]);
-	            }
+	    if (turn_lanes.test(key)) {
+	      return value;
+	    } else if (key === 'incline' && numeric.test(value)) {
+	      return value.replace(numeric, function (_, sign) {
+	        return sign === '-' ? '' : '-';
+	      });
+	    } else if (options && options.reverseOneway && key === 'oneway') {
+	      return onewayReplacements[value] || value;
+	    } else if (includeAbsolute && directionKey.test(key)) {
+	      if (compassReplacements[value]) return compassReplacements[value];
+	      var degrees = parseFloat(value);
+
+	      if (typeof degrees === 'number' && !isNaN(degrees)) {
+	        if (degrees < 180) {
+	          degrees += 180;
+	        } else {
+	          degrees -= 180;
 	        }
-	        return key;
-	    }
-
-
-	    function reverseValue(key, value, includeAbsolute) {
-	        if (ignoreKey.test(key)) { return value; }
 
-	        // Turn lanes are left/right to key (not way) direction - #5674
-	        if (turn_lanes.test(key)) {
-	            return value;
+	        return degrees.toString();
+	      }
+	    }
 
-	        } else if (key === 'incline' && numeric.test(value)) {
-	            return value.replace(numeric, function(_, sign) { return sign === '-' ? '' : '-'; });
+	    return valueReplacements[value] || value;
+	  } // Reverse the direction of tags attached to the nodes - #3076
 
-	        } else if (options && options.reverseOneway && key === 'oneway') {
-	            return onewayReplacements[value] || value;
 
-	        } else if (includeAbsolute && directionKey.test(key)) {
-	            if (compassReplacements[value]) { return compassReplacements[value]; }
+	  function reverseNodeTags(graph, nodeIDs) {
+	    for (var i = 0; i < nodeIDs.length; i++) {
+	      var node = graph.hasEntity(nodeIDs[i]);
+	      if (!node || !Object.keys(node.tags).length) continue;
+	      var tags = {};
 
-	            var degrees = parseFloat(value);
-	            if (typeof degrees === 'number' && !isNaN(degrees)) {
-	                if (degrees < 180) {
-	                    degrees += 180;
-	                } else {
-	                    degrees -= 180;
-	                }
-	                return degrees.toString();
-	            }
-	        }
+	      for (var key in node.tags) {
+	        tags[reverseKey(key)] = reverseValue(key, node.tags[key], node.id === entityID);
+	      }
 
-	        return valueReplacements[value] || value;
+	      graph = graph.replace(node.update({
+	        tags: tags
+	      }));
 	    }
 
+	    return graph;
+	  }
 
-	    // Reverse the direction of tags attached to the nodes - #3076
-	    function reverseNodeTags(graph, nodeIDs) {
-	        for (var i = 0; i < nodeIDs.length; i++) {
-	            var node = graph.hasEntity(nodeIDs[i]);
-	            if (!node || !Object.keys(node.tags).length) { continue; }
+	  function reverseWay(graph, way) {
+	    var nodes = way.nodes.slice().reverse();
+	    var tags = {};
+	    var role;
 
-	            var tags = {};
-	            for (var key in node.tags) {
-	                tags[reverseKey(key)] = reverseValue(key, node.tags[key], node.id === entityID);
-	            }
-	            graph = graph.replace(node.update({tags: tags}));
-	        }
-	        return graph;
+	    for (var key in way.tags) {
+	      tags[reverseKey(key)] = reverseValue(key, way.tags[key]);
 	    }
 
-
-	    function reverseWay(graph, way) {
-	        var nodes = way.nodes.slice().reverse();
-	        var tags = {};
-	        var role;
-
-	        for (var key in way.tags) {
-	            tags[reverseKey(key)] = reverseValue(key, way.tags[key]);
+	    graph.parentRelations(way).forEach(function (relation) {
+	      relation.members.forEach(function (member, index) {
+	        if (member.id === way.id && (role = roleReplacements[member.role])) {
+	          relation = relation.updateMember({
+	            role: role
+	          }, index);
+	          graph = graph.replace(relation);
 	        }
+	      });
+	    }); // Reverse any associated directions on nodes on the way and then replace
+	    // the way itself with the reversed node ids and updated way tags
 
-	        graph.parentRelations(way).forEach(function(relation) {
-	            relation.members.forEach(function(member, index) {
-	                if (member.id === way.id && (role = roleReplacements[member.role])) {
-	                    relation = relation.updateMember({role: role}, index);
-	                    graph = graph.replace(relation);
-	                }
-	            });
-	        });
+	    return reverseNodeTags(graph, nodes).replace(way.update({
+	      nodes: nodes,
+	      tags: tags
+	    }));
+	  }
+
+	  var action = function action(graph) {
+	    var entity = graph.entity(entityID);
 
-	        // Reverse any associated directions on nodes on the way and then replace
-	        // the way itself with the reversed node ids and updated way tags
-	        return reverseNodeTags(graph, nodes)
-	            .replace(way.update({nodes: nodes, tags: tags}));
+	    if (entity.type === 'way') {
+	      return reverseWay(graph, entity);
 	    }
 
+	    return reverseNodeTags(graph, [entityID]);
+	  };
 
-	    var action = function(graph) {
-	        var entity = graph.entity(entityID);
-	        if (entity.type === 'way') {
-	            return reverseWay(graph, entity);
-	        }
-	        return reverseNodeTags(graph, [entityID]);
-	    };
+	  action.disabled = function (graph) {
+	    var entity = graph.hasEntity(entityID);
+	    if (!entity || entity.type === 'way') return false;
 
-	    action.disabled = function(graph) {
-	        var entity = graph.hasEntity(entityID);
-	        if (!entity || entity.type === 'way') { return false; }
+	    for (var key in entity.tags) {
+	      var value = entity.tags[key];
 
-	        for (var key in entity.tags) {
-	            var value = entity.tags[key];
-	            if (reverseKey(key) !== key || reverseValue(key, value, true) !== value) {
-	                return false;
-	            }
-	        }
-	        return 'nondirectional_node';
-	    };
+	      if (reverseKey(key) !== key || reverseValue(key, value, true) !== value) {
+	        return false;
+	      }
+	    }
 
-	    action.entityID = function() {
-	        return entityID;
-	    };
+	    return 'nondirectional_node';
+	  };
 
-	    return action;
+	  action.entityID = function () {
+	    return entityID;
+	  };
+
+	  return action;
 	}
 
 	function osmIsInterestingTag(key) {
-	    return key !== 'attribution' &&
-	        key !== 'created_by' &&
-	        key !== 'source' &&
-	        key !== 'odbl' &&
-	        key.indexOf('source:') !== 0 &&
-	        key.indexOf('source_ref') !== 0 && // purposely exclude colon
-	        key.indexOf('tiger:') !== 0;
+	  return key !== 'attribution' && key !== 'created_by' && key !== 'source' && key !== 'odbl' && key.indexOf('source:') !== 0 && key.indexOf('source_ref') !== 0 && // purposely exclude colon
+	  key.indexOf('tiger:') !== 0;
 	}
-
 	var osmAreaKeys = {};
 	function osmSetAreaKeys(value) {
-	    osmAreaKeys = value;
-	}
+	  osmAreaKeys = value;
+	} // returns an object with the tag from `tags` that implies an area geometry, if any
 
-	// returns an object with the tag from `tags` that implies an area geometry, if any
 	function osmTagSuggestingArea(tags) {
-	    if (tags.area === 'yes') { return { area: 'yes' }; }
-	    if (tags.area === 'no') { return null; }
-
-	    // `highway` and `railway` are typically linear features, but there
-	    // are a few exceptions that should be treated as areas, even in the
-	    // absence of a proper `area=yes` or `areaKeys` tag.. see #4194
-	    var lineKeys = {
-	        highway: {
-	            rest_area: true,
-	            services: true
-	        },
-	        railway: {
-	            roundhouse: true,
-	            station: true,
-	            traverser: true,
-	            turntable: true,
-	            wash: true
-	        }
-	    };
-	    var returnTags = {};
-	    for (var key in tags) {
-	        if (key in osmAreaKeys && !(tags[key] in osmAreaKeys[key])) {
-	            returnTags[key] = tags[key];
-	            return returnTags;
-	        }
-	        if (key in lineKeys && tags[key] in lineKeys[key]) {
-	            returnTags[key] = tags[key];
-	            return returnTags;
-	        }
+	  if (tags.area === 'yes') return {
+	    area: 'yes'
+	  };
+	  if (tags.area === 'no') return null; // `highway` and `railway` are typically linear features, but there
+	  // are a few exceptions that should be treated as areas, even in the
+	  // absence of a proper `area=yes` or `areaKeys` tag.. see #4194
+
+	  var lineKeys = {
+	    highway: {
+	      rest_area: true,
+	      services: true
+	    },
+	    railway: {
+	      roundhouse: true,
+	      station: true,
+	      traverser: true,
+	      turntable: true,
+	      wash: true
 	    }
-	    return null;
-	}
+	  };
+	  var returnTags = {};
+
+	  for (var key in tags) {
+	    if (key in osmAreaKeys && !(tags[key] in osmAreaKeys[key])) {
+	      returnTags[key] = tags[key];
+	      return returnTags;
+	    }
+
+	    if (key in lineKeys && tags[key] in lineKeys[key]) {
+	      returnTags[key] = tags[key];
+	      return returnTags;
+	    }
+	  }
 
-	// Tags that indicate a node can be a standalone point
+	  return null;
+	} // Tags that indicate a node can be a standalone point
 	// e.g. { amenity: { bar: true, parking: true, ... } ... }
+
 	var osmPointTags = {};
 	function osmSetPointTags(value) {
-	    osmPointTags = value;
-	}
-	// Tags that indicate a node can be part of a way
+	  osmPointTags = value;
+	} // Tags that indicate a node can be part of a way
 	// e.g. { amenity: { parking: true, ... }, highway: { stop: true ... } ... }
+
 	var osmVertexTags = {};
 	function osmSetVertexTags(value) {
-	    osmVertexTags = value;
+	  osmVertexTags = value;
 	}
-
 	function osmNodeGeometriesForTags(nodeTags) {
-	    var geometries = {};
-	    for (var key in nodeTags) {
-	        if (osmPointTags[key] &&
-	            (osmPointTags[key]['*'] || osmPointTags[key][nodeTags[key]])) {
-	            geometries.point = true;
-	        }
-	        if (osmVertexTags[key] &&
-	            (osmVertexTags[key]['*'] || osmVertexTags[key][nodeTags[key]])) {
-	            geometries.vertex = true;
-	        }
-	        // break early if both are already supported
-	        if (geometries.point && geometries.vertex) { break; }
+	  var geometries = {};
+
+	  for (var key in nodeTags) {
+	    if (osmPointTags[key] && (osmPointTags[key]['*'] || osmPointTags[key][nodeTags[key]])) {
+	      geometries.point = true;
 	    }
-	    return geometries;
-	}
 
+	    if (osmVertexTags[key] && (osmVertexTags[key]['*'] || osmVertexTags[key][nodeTags[key]])) {
+	      geometries.vertex = true;
+	    } // break early if both are already supported
+
+
+	    if (geometries.point && geometries.vertex) break;
+	  }
+
+	  return geometries;
+	}
 	var osmOneWayTags = {
-	    'aerialway': {
-	        'chair_lift': true,
-	        'drag_lift': true,
-	        'j-bar': true,
-	        'magic_carpet': true,
-	        'mixed_lift': true,
-	        'platter': true,
-	        'rope_tow': true,
-	        't-bar': true,
-	        'zip_line': true
-	    },
-	    'highway': {
-	        'motorway': true
-	    },
-	    'junction': {
-	        'circular': true,
-	        'roundabout': true
-	    },
-	    'man_made': {
-	        'goods_conveyor': true,
-	        'piste:halfpipe': true
-	    },
-	    'piste:type': {
-	        'downhill': true,
-	        'sled': true,
-	        'yes': true
-	    },
-	    'waterway': {
-	        'canal': true,
-	        'ditch': true,
-	        'drain': true,
-	        'fish_pass': true,
-	        'river': true,
-	        'stream': true,
-	        'tidal_channel': true
-	    }
-	};
+	  'aerialway': {
+	    'chair_lift': true,
+	    'drag_lift': true,
+	    'j-bar': true,
+	    'magic_carpet': true,
+	    'mixed_lift': true,
+	    'platter': true,
+	    'rope_tow': true,
+	    't-bar': true,
+	    'zip_line': true
+	  },
+	  'highway': {
+	    'motorway': true
+	  },
+	  'junction': {
+	    'circular': true,
+	    'roundabout': true
+	  },
+	  'man_made': {
+	    'goods_conveyor': true,
+	    'piste:halfpipe': true
+	  },
+	  'piste:type': {
+	    'downhill': true,
+	    'sled': true,
+	    'yes': true
+	  },
+	  'seamark:type': {
+	    'separation_lane': true,
+	    'separation_roundabout': true
+	  },
+	  'waterway': {
+	    'canal': true,
+	    'ditch': true,
+	    'drain': true,
+	    'fish_pass': true,
+	    'river': true,
+	    'stream': true,
+	    'tidal_channel': true
+	  }
+	}; // solid and smooth surfaces akin to the assumed default road surface in OSM
 
-	// solid and smooth surfaces akin to the assumed default road surface in OSM
 	var osmPavedTags = {
-	    'surface': {
-	        'paved': true,
-	        'asphalt': true,
-	        'concrete': true,
-	        'concrete:lanes': true,
-	        'concrete:plates': true
-	    },
-	    'tracktype': {
-	        'grade1': true
-	    }
-	};
+	  'surface': {
+	    'paved': true,
+	    'asphalt': true,
+	    'concrete': true,
+	    'concrete:lanes': true,
+	    'concrete:plates': true
+	  },
+	  'tracktype': {
+	    'grade1': true
+	  }
+	}; // solid, if somewhat uncommon surfaces with a high range of smoothness
 
-	// solid, if somewhat uncommon surfaces with a high range of smoothness
 	var osmSemipavedTags = {
-	    'surface': {
-	        'cobblestone': true,
-	        'cobblestone:flattened': true,
-	        'unhewn_cobblestone': true,
-	        'sett': true,
-	        'paving_stones': true,
-	        'metal': true,
-	        'wood': true
-	    }
+	  'surface': {
+	    'cobblestone': true,
+	    'cobblestone:flattened': true,
+	    'unhewn_cobblestone': true,
+	    'sett': true,
+	    'paving_stones': true,
+	    'metal': true,
+	    'wood': true
+	  }
 	};
-
 	var osmRightSideIsInsideTags = {
-	    'natural': {
-	        'cliff': true,
-	        'coastline': 'coastline',
-	    },
-	    'barrier': {
-	        'retaining_wall': true,
-	        'kerb': true,
-	        'guard_rail': true,
-	        'city_wall': true,
-	    },
-	    'man_made': {
-	        'embankment': true
-	    },
-	    'waterway': {
-	        'weir': true
-	    }
-	};
-
-	// "highway" tag values for pedestrian or vehicle right-of-ways that make up the routable network
+	  'natural': {
+	    'cliff': true,
+	    'coastline': 'coastline'
+	  },
+	  'barrier': {
+	    'retaining_wall': true,
+	    'kerb': true,
+	    'guard_rail': true,
+	    'city_wall': true
+	  },
+	  'man_made': {
+	    'embankment': true
+	  },
+	  'waterway': {
+	    'weir': true
+	  }
+	}; // "highway" tag values for pedestrian or vehicle right-of-ways that make up the routable network
 	// (does not include `raceway`)
+
 	var osmRoutableHighwayTagValues = {
-	    motorway: true, trunk: true, primary: true, secondary: true, tertiary: true, residential: true,
-	    motorway_link: true, trunk_link: true, primary_link: true, secondary_link: true, tertiary_link: true,
-	    unclassified: true, road: true, service: true, track: true, living_street: true, bus_guideway: true,
-	    path: true, footway: true, cycleway: true, bridleway: true, pedestrian: true, corridor: true, steps: true
-	};
-	// "highway" tag values that generally do not allow motor vehicles
+	  motorway: true,
+	  trunk: true,
+	  primary: true,
+	  secondary: true,
+	  tertiary: true,
+	  residential: true,
+	  motorway_link: true,
+	  trunk_link: true,
+	  primary_link: true,
+	  secondary_link: true,
+	  tertiary_link: true,
+	  unclassified: true,
+	  road: true,
+	  service: true,
+	  track: true,
+	  living_street: true,
+	  bus_guideway: true,
+	  path: true,
+	  footway: true,
+	  cycleway: true,
+	  bridleway: true,
+	  pedestrian: true,
+	  corridor: true,
+	  steps: true
+	}; // "highway" tag values that generally do not allow motor vehicles
+
 	var osmPathHighwayTagValues = {
-	    path: true, footway: true, cycleway: true, bridleway: true, pedestrian: true, corridor: true, steps: true
-	};
+	  path: true,
+	  footway: true,
+	  cycleway: true,
+	  bridleway: true,
+	  pedestrian: true,
+	  corridor: true,
+	  steps: true
+	}; // "railway" tag values representing existing railroad tracks (purposely does not include 'abandoned')
 
-	// "railway" tag values representing existing railroad tracks (purposely does not include 'abandoned')
 	var osmRailwayTrackTagValues = {
-	    rail: true, light_rail: true, tram: true, subway: true,
-	    monorail: true, funicular: true, miniature: true, narrow_gauge: true,
-	    disused: true, preserved: true
-	};
+	  rail: true,
+	  light_rail: true,
+	  tram: true,
+	  subway: true,
+	  monorail: true,
+	  funicular: true,
+	  miniature: true,
+	  narrow_gauge: true,
+	  disused: true,
+	  preserved: true
+	}; // "waterway" tag values for line features representing water flow
 
-	// "waterway" tag values for line features representing water flow
 	var osmFlowingWaterwayTagValues = {
-	    canal: true, ditch: true, drain: true, fish_pass: true, river: true, stream: true, tidal_channel: true
-	};
-
-	// Adds floating point numbers with twice the normal precision.
-	// Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and
-	// Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3)
-	// 305–363 (1997).
-	// Code adapted from GeographicLib by Charles F. F. Karney,
-	// http://geographiclib.sourceforge.net/
+	  canal: true,
+	  ditch: true,
+	  drain: true,
+	  fish_pass: true,
+	  river: true,
+	  stream: true,
+	  tidal_channel: true
+	};
+
+	var global$e = global$1o;
+	var fails$g = fails$V;
+	var uncurryThis$i = functionUncurryThis;
+	var toString$b = toString$k;
+	var trim$3 = stringTrim.trim;
+	var whitespaces = whitespaces$4;
+
+	var $parseInt$1 = global$e.parseInt;
+	var Symbol$1 = global$e.Symbol;
+	var ITERATOR = Symbol$1 && Symbol$1.iterator;
+	var hex$2 = /^[+-]?0x/i;
+	var exec$3 = uncurryThis$i(hex$2.exec);
+	var FORCED$8 = $parseInt$1(whitespaces + '08') !== 8 || $parseInt$1(whitespaces + '0x16') !== 22
+	  // MS Edge 18- broken with boxed symbols
+	  || (ITERATOR && !fails$g(function () { $parseInt$1(Object(ITERATOR)); }));
+
+	// `parseInt` method
+	// https://tc39.es/ecma262/#sec-parseint-string-radix
+	var numberParseInt = FORCED$8 ? function parseInt(string, radix) {
+	  var S = trim$3(toString$b(string));
+	  return $parseInt$1(S, (radix >>> 0) || (exec$3(hex$2, S) ? 16 : 10));
+	} : $parseInt$1;
+
+	var $$G = _export;
+	var $parseInt = numberParseInt;
+
+	// `parseInt` method
+	// https://tc39.es/ecma262/#sec-parseint-string-radix
+	$$G({ global: true, forced: parseInt != $parseInt }, {
+	  parseInt: $parseInt
+	});
 
-	function adder() {
-	  return new Adder;
-	}
+	var internalMetadata = {exports: {}};
 
-	function Adder() {
-	  this.reset();
-	}
+	// FF26- bug: ArrayBuffers are non-extensible, but Object.isExtensible does not report it
+	var fails$f = fails$V;
 
-	Adder.prototype = {
-	  constructor: Adder,
-	  reset: function() {
-	    this.s = // rounded value
-	    this.t = 0; // exact error
-	  },
-	  add: function(y) {
-	    add(temp, y, this.t);
-	    add(this, temp.s, this.s);
-	    if (this.s) { this.t += temp.t; }
-	    else { this.s = temp.t; }
-	  },
-	  valueOf: function() {
-	    return this.s;
+	var arrayBufferNonExtensible = fails$f(function () {
+	  if (typeof ArrayBuffer == 'function') {
+	    var buffer = new ArrayBuffer(8);
+	    // eslint-disable-next-line es/no-object-isextensible, es/no-object-defineproperty -- safe
+	    if (Object.isExtensible(buffer)) Object.defineProperty(buffer, 'a', { value: 8 });
 	  }
-	};
+	});
 
-	var temp = new Adder;
+	var fails$e = fails$V;
+	var isObject$7 = isObject$s;
+	var classof = classofRaw$1;
+	var ARRAY_BUFFER_NON_EXTENSIBLE = arrayBufferNonExtensible;
 
-	function add(adder, a, b) {
-	  var x = adder.s = a + b,
-	      bv = x - a,
-	      av = x - bv;
-	  adder.t = (a - av) + (b - bv);
-	}
+	// eslint-disable-next-line es/no-object-isextensible -- safe
+	var $isExtensible = Object.isExtensible;
+	var FAILS_ON_PRIMITIVES$1 = fails$e(function () { $isExtensible(1); });
 
-	var epsilon = 1e-6;
-	var epsilon2 = 1e-12;
-	var pi = Math.PI;
-	var halfPi = pi / 2;
-	var quarterPi = pi / 4;
-	var tau = pi * 2;
+	// `Object.isExtensible` method
+	// https://tc39.es/ecma262/#sec-object.isextensible
+	var objectIsExtensible = (FAILS_ON_PRIMITIVES$1 || ARRAY_BUFFER_NON_EXTENSIBLE) ? function isExtensible(it) {
+	  if (!isObject$7(it)) return false;
+	  if (ARRAY_BUFFER_NON_EXTENSIBLE && classof(it) == 'ArrayBuffer') return false;
+	  return $isExtensible ? $isExtensible(it) : true;
+	} : $isExtensible;
 
-	var degrees = 180 / pi;
-	var radians = pi / 180;
+	var fails$d = fails$V;
 
-	var abs$2 = Math.abs;
-	var atan = Math.atan;
-	var atan2 = Math.atan2;
-	var cos = Math.cos;
-	var exp = Math.exp;
-	var log = Math.log;
-	var sin = Math.sin;
-	var sign$2 = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; };
-	var sqrt = Math.sqrt;
-	var tan = Math.tan;
+	var freezing = !fails$d(function () {
+	  // eslint-disable-next-line es/no-object-isextensible, es/no-object-preventextensions -- required for testing
+	  return Object.isExtensible(Object.preventExtensions({}));
+	});
 
-	function acos(x) {
-	  return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
-	}
+	var $$F = _export;
+	var uncurryThis$h = functionUncurryThis;
+	var hiddenKeys = hiddenKeys$6;
+	var isObject$6 = isObject$s;
+	var hasOwn$3 = hasOwnProperty_1;
+	var defineProperty$3 = objectDefineProperty.f;
+	var getOwnPropertyNamesModule = objectGetOwnPropertyNames;
+	var getOwnPropertyNamesExternalModule = objectGetOwnPropertyNamesExternal;
+	var isExtensible = objectIsExtensible;
+	var uid = uid$5;
+	var FREEZING$1 = freezing;
+
+	var REQUIRED = false;
+	var METADATA = uid('meta');
+	var id$1 = 0;
+
+	var setMetadata = function (it) {
+	  defineProperty$3(it, METADATA, { value: {
+	    objectID: 'O' + id$1++, // object ID
+	    weakData: {}          // weak collections IDs
+	  } });
+	};
+
+	var fastKey$1 = function (it, create) {
+	  // return a primitive with prefix
+	  if (!isObject$6(it)) return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;
+	  if (!hasOwn$3(it, METADATA)) {
+	    // can't set metadata to uncaught frozen object
+	    if (!isExtensible(it)) return 'F';
+	    // not necessary to add metadata
+	    if (!create) return 'E';
+	    // add missing metadata
+	    setMetadata(it);
+	  // return object ID
+	  } return it[METADATA].objectID;
+	};
+
+	var getWeakData = function (it, create) {
+	  if (!hasOwn$3(it, METADATA)) {
+	    // can't set metadata to uncaught frozen object
+	    if (!isExtensible(it)) return true;
+	    // not necessary to add metadata
+	    if (!create) return false;
+	    // add missing metadata
+	    setMetadata(it);
+	  // return the store of weak collections IDs
+	  } return it[METADATA].weakData;
+	};
+
+	// add metadata on freeze-family methods calling
+	var onFreeze$1 = function (it) {
+	  if (FREEZING$1 && REQUIRED && isExtensible(it) && !hasOwn$3(it, METADATA)) setMetadata(it);
+	  return it;
+	};
+
+	var enable = function () {
+	  meta.enable = function () { /* empty */ };
+	  REQUIRED = true;
+	  var getOwnPropertyNames = getOwnPropertyNamesModule.f;
+	  var splice = uncurryThis$h([].splice);
+	  var test = {};
+	  test[METADATA] = 1;
+
+	  // prevent exposing of metadata key
+	  if (getOwnPropertyNames(test).length) {
+	    getOwnPropertyNamesModule.f = function (it) {
+	      var result = getOwnPropertyNames(it);
+	      for (var i = 0, length = result.length; i < length; i++) {
+	        if (result[i] === METADATA) {
+	          splice(result, i, 1);
+	          break;
+	        }
+	      } return result;
+	    };
 
-	function asin(x) {
-	  return x > 1 ? halfPi : x < -1 ? -halfPi : Math.asin(x);
-	}
+	    $$F({ target: 'Object', stat: true, forced: true }, {
+	      getOwnPropertyNames: getOwnPropertyNamesExternalModule.f
+	    });
+	  }
+	};
 
-	function noop$2() {}
+	var meta = internalMetadata.exports = {
+	  enable: enable,
+	  fastKey: fastKey$1,
+	  getWeakData: getWeakData,
+	  onFreeze: onFreeze$1
+	};
+
+	hiddenKeys[METADATA] = true;
+
+	var $$E = _export;
+	var global$d = global$1o;
+	var uncurryThis$g = functionUncurryThis;
+	var isForced$2 = isForced_1;
+	var redefine$4 = redefine$h.exports;
+	var InternalMetadataModule = internalMetadata.exports;
+	var iterate$1 = iterate$3;
+	var anInstance$2 = anInstance$7;
+	var isCallable$1 = isCallable$r;
+	var isObject$5 = isObject$s;
+	var fails$c = fails$V;
+	var checkCorrectnessOfIteration$1 = checkCorrectnessOfIteration$4;
+	var setToStringTag$1 = setToStringTag$a;
+	var inheritIfRequired$2 = inheritIfRequired$4;
+
+	var collection$2 = function (CONSTRUCTOR_NAME, wrapper, common) {
+	  var IS_MAP = CONSTRUCTOR_NAME.indexOf('Map') !== -1;
+	  var IS_WEAK = CONSTRUCTOR_NAME.indexOf('Weak') !== -1;
+	  var ADDER = IS_MAP ? 'set' : 'add';
+	  var NativeConstructor = global$d[CONSTRUCTOR_NAME];
+	  var NativePrototype = NativeConstructor && NativeConstructor.prototype;
+	  var Constructor = NativeConstructor;
+	  var exported = {};
+
+	  var fixMethod = function (KEY) {
+	    var uncurriedNativeMethod = uncurryThis$g(NativePrototype[KEY]);
+	    redefine$4(NativePrototype, KEY,
+	      KEY == 'add' ? function add(value) {
+	        uncurriedNativeMethod(this, value === 0 ? 0 : value);
+	        return this;
+	      } : KEY == 'delete' ? function (key) {
+	        return IS_WEAK && !isObject$5(key) ? false : uncurriedNativeMethod(this, key === 0 ? 0 : key);
+	      } : KEY == 'get' ? function get(key) {
+	        return IS_WEAK && !isObject$5(key) ? undefined : uncurriedNativeMethod(this, key === 0 ? 0 : key);
+	      } : KEY == 'has' ? function has(key) {
+	        return IS_WEAK && !isObject$5(key) ? false : uncurriedNativeMethod(this, key === 0 ? 0 : key);
+	      } : function set(key, value) {
+	        uncurriedNativeMethod(this, key === 0 ? 0 : key, value);
+	        return this;
+	      }
+	    );
+	  };
 
-	function streamGeometry(geometry, stream) {
-	  if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
-	    streamGeometryType[geometry.type](geometry, stream);
-	  }
-	}
+	  var REPLACE = isForced$2(
+	    CONSTRUCTOR_NAME,
+	    !isCallable$1(NativeConstructor) || !(IS_WEAK || NativePrototype.forEach && !fails$c(function () {
+	      new NativeConstructor().entries().next();
+	    }))
+	  );
 
-	var streamObjectType = {
-	  Feature: function(object, stream) {
-	    streamGeometry(object.geometry, stream);
-	  },
-	  FeatureCollection: function(object, stream) {
-	    var features = object.features, i = -1, n = features.length;
-	    while (++i < n) { streamGeometry(features[i].geometry, stream); }
-	  }
-	};
+	  if (REPLACE) {
+	    // create collection constructor
+	    Constructor = common.getConstructor(wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER);
+	    InternalMetadataModule.enable();
+	  } else if (isForced$2(CONSTRUCTOR_NAME, true)) {
+	    var instance = new Constructor();
+	    // early implementations not supports chaining
+	    var HASNT_CHAINING = instance[ADDER](IS_WEAK ? {} : -0, 1) != instance;
+	    // V8 ~ Chromium 40- weak-collections throws on primitives, but should return false
+	    var THROWS_ON_PRIMITIVES = fails$c(function () { instance.has(1); });
+	    // most early implementations doesn't supports iterables, most modern - not close it correctly
+	    // eslint-disable-next-line no-new -- required for testing
+	    var ACCEPT_ITERABLES = checkCorrectnessOfIteration$1(function (iterable) { new NativeConstructor(iterable); });
+	    // for early implementations -0 and +0 not the same
+	    var BUGGY_ZERO = !IS_WEAK && fails$c(function () {
+	      // V8 ~ Chromium 42- fails only with 5+ elements
+	      var $instance = new NativeConstructor();
+	      var index = 5;
+	      while (index--) $instance[ADDER](index, index);
+	      return !$instance.has(-0);
+	    });
 
-	var streamGeometryType = {
-	  Sphere: function(object, stream) {
-	    stream.sphere();
-	  },
-	  Point: function(object, stream) {
-	    object = object.coordinates;
-	    stream.point(object[0], object[1], object[2]);
-	  },
-	  MultiPoint: function(object, stream) {
-	    var coordinates = object.coordinates, i = -1, n = coordinates.length;
-	    while (++i < n) { object = coordinates[i], stream.point(object[0], object[1], object[2]); }
-	  },
-	  LineString: function(object, stream) {
-	    streamLine(object.coordinates, stream, 0);
-	  },
-	  MultiLineString: function(object, stream) {
-	    var coordinates = object.coordinates, i = -1, n = coordinates.length;
-	    while (++i < n) { streamLine(coordinates[i], stream, 0); }
-	  },
-	  Polygon: function(object, stream) {
-	    streamPolygon(object.coordinates, stream);
-	  },
-	  MultiPolygon: function(object, stream) {
-	    var coordinates = object.coordinates, i = -1, n = coordinates.length;
-	    while (++i < n) { streamPolygon(coordinates[i], stream); }
-	  },
-	  GeometryCollection: function(object, stream) {
-	    var geometries = object.geometries, i = -1, n = geometries.length;
-	    while (++i < n) { streamGeometry(geometries[i], stream); }
-	  }
-	};
+	    if (!ACCEPT_ITERABLES) {
+	      Constructor = wrapper(function (dummy, iterable) {
+	        anInstance$2(dummy, NativePrototype);
+	        var that = inheritIfRequired$2(new NativeConstructor(), dummy, Constructor);
+	        if (iterable != undefined) iterate$1(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });
+	        return that;
+	      });
+	      Constructor.prototype = NativePrototype;
+	      NativePrototype.constructor = Constructor;
+	    }
 
-	function streamLine(coordinates, stream, closed) {
-	  var i = -1, n = coordinates.length - closed, coordinate;
-	  stream.lineStart();
-	  while (++i < n) { coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]); }
-	  stream.lineEnd();
-	}
+	    if (THROWS_ON_PRIMITIVES || BUGGY_ZERO) {
+	      fixMethod('delete');
+	      fixMethod('has');
+	      IS_MAP && fixMethod('get');
+	    }
 
-	function streamPolygon(coordinates, stream) {
-	  var i = -1, n = coordinates.length;
-	  stream.polygonStart();
-	  while (++i < n) { streamLine(coordinates[i], stream, 1); }
-	  stream.polygonEnd();
-	}
+	    if (BUGGY_ZERO || HASNT_CHAINING) fixMethod(ADDER);
 
-	function d3_geoStream(object, stream) {
-	  if (object && streamObjectType.hasOwnProperty(object.type)) {
-	    streamObjectType[object.type](object, stream);
-	  } else {
-	    streamGeometry(object, stream);
+	    // weak collections should not contains .clear method
+	    if (IS_WEAK && NativePrototype.clear) delete NativePrototype.clear;
 	  }
-	}
 
-	var areaRingSum = adder();
+	  exported[CONSTRUCTOR_NAME] = Constructor;
+	  $$E({ global: true, forced: Constructor != NativeConstructor }, exported);
 
-	var areaSum = adder(),
-	    lambda00,
-	    phi00,
-	    lambda0,
-	    cosPhi0,
-	    sinPhi0;
+	  setToStringTag$1(Constructor, CONSTRUCTOR_NAME);
 
-	var areaStream = {
-	  point: noop$2,
-	  lineStart: noop$2,
-	  lineEnd: noop$2,
-	  polygonStart: function() {
-	    areaRingSum.reset();
-	    areaStream.lineStart = areaRingStart;
-	    areaStream.lineEnd = areaRingEnd;
-	  },
-	  polygonEnd: function() {
-	    var areaRing = +areaRingSum;
-	    areaSum.add(areaRing < 0 ? tau + areaRing : areaRing);
-	    this.lineStart = this.lineEnd = this.point = noop$2;
-	  },
-	  sphere: function() {
-	    areaSum.add(tau);
-	  }
-	};
+	  if (!IS_WEAK) common.setStrong(Constructor, CONSTRUCTOR_NAME, IS_MAP);
 
-	function areaRingStart() {
-	  areaStream.point = areaPointFirst;
-	}
+	  return Constructor;
+	};
 
-	function areaRingEnd() {
-	  areaPoint(lambda00, phi00);
-	}
+	var defineProperty$2 = objectDefineProperty.f;
+	var create$3 = objectCreate;
+	var redefineAll = redefineAll$4;
+	var bind$6 = functionBindContext;
+	var anInstance$1 = anInstance$7;
+	var iterate = iterate$3;
+	var defineIterator = defineIterator$3;
+	var setSpecies$1 = setSpecies$5;
+	var DESCRIPTORS$6 = descriptors;
+	var fastKey = internalMetadata.exports.fastKey;
+	var InternalStateModule$1 = internalState;
 
-	function areaPointFirst(lambda, phi) {
-	  areaStream.point = areaPoint;
-	  lambda00 = lambda, phi00 = phi;
-	  lambda *= radians, phi *= radians;
-	  lambda0 = lambda, cosPhi0 = cos(phi = phi / 2 + quarterPi), sinPhi0 = sin(phi);
-	}
+	var setInternalState$1 = InternalStateModule$1.set;
+	var internalStateGetterFor = InternalStateModule$1.getterFor;
 
-	function areaPoint(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  phi = phi / 2 + quarterPi; // half the angular distance from south pole
+	var collectionStrong$2 = {
+	  getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {
+	    var Constructor = wrapper(function (that, iterable) {
+	      anInstance$1(that, Prototype);
+	      setInternalState$1(that, {
+	        type: CONSTRUCTOR_NAME,
+	        index: create$3(null),
+	        first: undefined,
+	        last: undefined,
+	        size: 0
+	      });
+	      if (!DESCRIPTORS$6) that.size = 0;
+	      if (iterable != undefined) iterate(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });
+	    });
 
-	  // Spherical excess E for a spherical triangle with vertices: south pole,
-	  // previous point, current point.  Uses a formula derived from Cagnoli’s
-	  // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
-	  var dLambda = lambda - lambda0,
-	      sdLambda = dLambda >= 0 ? 1 : -1,
-	      adLambda = sdLambda * dLambda,
-	      cosPhi = cos(phi),
-	      sinPhi = sin(phi),
-	      k = sinPhi0 * sinPhi,
-	      u = cosPhi0 * cosPhi + k * cos(adLambda),
-	      v = k * sdLambda * sin(adLambda);
-	  areaRingSum.add(atan2(v, u));
+	    var Prototype = Constructor.prototype;
 
-	  // Advance the previous points.
-	  lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;
-	}
+	    var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);
 
-	function d3_geoArea(object) {
-	  areaSum.reset();
-	  d3_geoStream(object, areaStream);
-	  return areaSum * 2;
-	}
+	    var define = function (that, key, value) {
+	      var state = getInternalState(that);
+	      var entry = getEntry(that, key);
+	      var previous, index;
+	      // change existing entry
+	      if (entry) {
+	        entry.value = value;
+	      // create new entry
+	      } else {
+	        state.last = entry = {
+	          index: index = fastKey(key, true),
+	          key: key,
+	          value: value,
+	          previous: previous = state.last,
+	          next: undefined,
+	          removed: false
+	        };
+	        if (!state.first) state.first = entry;
+	        if (previous) previous.next = entry;
+	        if (DESCRIPTORS$6) state.size++;
+	        else that.size++;
+	        // add to index
+	        if (index !== 'F') state.index[index] = entry;
+	      } return that;
+	    };
+
+	    var getEntry = function (that, key) {
+	      var state = getInternalState(that);
+	      // fast case
+	      var index = fastKey(key);
+	      var entry;
+	      if (index !== 'F') return state.index[index];
+	      // frozen object case
+	      for (entry = state.first; entry; entry = entry.next) {
+	        if (entry.key == key) return entry;
+	      }
+	    };
 
-	function spherical(cartesian) {
-	  return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];
-	}
+	    redefineAll(Prototype, {
+	      // `{ Map, Set }.prototype.clear()` methods
+	      // https://tc39.es/ecma262/#sec-map.prototype.clear
+	      // https://tc39.es/ecma262/#sec-set.prototype.clear
+	      clear: function clear() {
+	        var that = this;
+	        var state = getInternalState(that);
+	        var data = state.index;
+	        var entry = state.first;
+	        while (entry) {
+	          entry.removed = true;
+	          if (entry.previous) entry.previous = entry.previous.next = undefined;
+	          delete data[entry.index];
+	          entry = entry.next;
+	        }
+	        state.first = state.last = undefined;
+	        if (DESCRIPTORS$6) state.size = 0;
+	        else that.size = 0;
+	      },
+	      // `{ Map, Set }.prototype.delete(key)` methods
+	      // https://tc39.es/ecma262/#sec-map.prototype.delete
+	      // https://tc39.es/ecma262/#sec-set.prototype.delete
+	      'delete': function (key) {
+	        var that = this;
+	        var state = getInternalState(that);
+	        var entry = getEntry(that, key);
+	        if (entry) {
+	          var next = entry.next;
+	          var prev = entry.previous;
+	          delete state.index[entry.index];
+	          entry.removed = true;
+	          if (prev) prev.next = next;
+	          if (next) next.previous = prev;
+	          if (state.first == entry) state.first = next;
+	          if (state.last == entry) state.last = prev;
+	          if (DESCRIPTORS$6) state.size--;
+	          else that.size--;
+	        } return !!entry;
+	      },
+	      // `{ Map, Set }.prototype.forEach(callbackfn, thisArg = undefined)` methods
+	      // https://tc39.es/ecma262/#sec-map.prototype.foreach
+	      // https://tc39.es/ecma262/#sec-set.prototype.foreach
+	      forEach: function forEach(callbackfn /* , that = undefined */) {
+	        var state = getInternalState(this);
+	        var boundFunction = bind$6(callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	        var entry;
+	        while (entry = entry ? entry.next : state.first) {
+	          boundFunction(entry.value, entry.key, this);
+	          // revert to the last existing entry
+	          while (entry && entry.removed) entry = entry.previous;
+	        }
+	      },
+	      // `{ Map, Set}.prototype.has(key)` methods
+	      // https://tc39.es/ecma262/#sec-map.prototype.has
+	      // https://tc39.es/ecma262/#sec-set.prototype.has
+	      has: function has(key) {
+	        return !!getEntry(this, key);
+	      }
+	    });
 
-	function cartesian(spherical) {
-	  var lambda = spherical[0], phi = spherical[1], cosPhi = cos(phi);
-	  return [cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi)];
-	}
+	    redefineAll(Prototype, IS_MAP ? {
+	      // `Map.prototype.get(key)` method
+	      // https://tc39.es/ecma262/#sec-map.prototype.get
+	      get: function get(key) {
+	        var entry = getEntry(this, key);
+	        return entry && entry.value;
+	      },
+	      // `Map.prototype.set(key, value)` method
+	      // https://tc39.es/ecma262/#sec-map.prototype.set
+	      set: function set(key, value) {
+	        return define(this, key === 0 ? 0 : key, value);
+	      }
+	    } : {
+	      // `Set.prototype.add(value)` method
+	      // https://tc39.es/ecma262/#sec-set.prototype.add
+	      add: function add(value) {
+	        return define(this, value = value === 0 ? 0 : value, value);
+	      }
+	    });
+	    if (DESCRIPTORS$6) defineProperty$2(Prototype, 'size', {
+	      get: function () {
+	        return getInternalState(this).size;
+	      }
+	    });
+	    return Constructor;
+	  },
+	  setStrong: function (Constructor, CONSTRUCTOR_NAME, IS_MAP) {
+	    var ITERATOR_NAME = CONSTRUCTOR_NAME + ' Iterator';
+	    var getInternalCollectionState = internalStateGetterFor(CONSTRUCTOR_NAME);
+	    var getInternalIteratorState = internalStateGetterFor(ITERATOR_NAME);
+	    // `{ Map, Set }.prototype.{ keys, values, entries, @@iterator }()` methods
+	    // https://tc39.es/ecma262/#sec-map.prototype.entries
+	    // https://tc39.es/ecma262/#sec-map.prototype.keys
+	    // https://tc39.es/ecma262/#sec-map.prototype.values
+	    // https://tc39.es/ecma262/#sec-map.prototype-@@iterator
+	    // https://tc39.es/ecma262/#sec-set.prototype.entries
+	    // https://tc39.es/ecma262/#sec-set.prototype.keys
+	    // https://tc39.es/ecma262/#sec-set.prototype.values
+	    // https://tc39.es/ecma262/#sec-set.prototype-@@iterator
+	    defineIterator(Constructor, CONSTRUCTOR_NAME, function (iterated, kind) {
+	      setInternalState$1(this, {
+	        type: ITERATOR_NAME,
+	        target: iterated,
+	        state: getInternalCollectionState(iterated),
+	        kind: kind,
+	        last: undefined
+	      });
+	    }, function () {
+	      var state = getInternalIteratorState(this);
+	      var kind = state.kind;
+	      var entry = state.last;
+	      // revert to the last existing entry
+	      while (entry && entry.removed) entry = entry.previous;
+	      // get next entry
+	      if (!state.target || !(state.last = entry = entry ? entry.next : state.state.first)) {
+	        // or finish the iteration
+	        state.target = undefined;
+	        return { value: undefined, done: true };
+	      }
+	      // return step by kind
+	      if (kind == 'keys') return { value: entry.key, done: false };
+	      if (kind == 'values') return { value: entry.value, done: false };
+	      return { value: [entry.key, entry.value], done: false };
+	    }, IS_MAP ? 'entries' : 'values', !IS_MAP, true);
 
-	function cartesianDot(a, b) {
-	  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
-	}
+	    // `{ Map, Set }.prototype[@@species]` accessors
+	    // https://tc39.es/ecma262/#sec-get-map-@@species
+	    // https://tc39.es/ecma262/#sec-get-set-@@species
+	    setSpecies$1(CONSTRUCTOR_NAME);
+	  }
+	};
 
-	function cartesianCross(a, b) {
-	  return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
-	}
+	var collection$1 = collection$2;
+	var collectionStrong$1 = collectionStrong$2;
 
-	// TODO return a
-	function cartesianAddInPlace(a, b) {
-	  a[0] += b[0], a[1] += b[1], a[2] += b[2];
-	}
+	// `Set` constructor
+	// https://tc39.es/ecma262/#sec-set-objects
+	collection$1('Set', function (init) {
+	  return function Set() { return init(this, arguments.length ? arguments[0] : undefined); };
+	}, collectionStrong$1);
 
-	function cartesianScale(vector, k) {
-	  return [vector[0] * k, vector[1] * k, vector[2] * k];
+	function d3_ascending (a, b) {
+	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
 	}
 
-	// TODO return d
-	function cartesianNormalizeInPlace(d) {
-	  var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
-	  d[0] /= l, d[1] /= l, d[2] /= l;
-	}
+	function d3_bisector (f) {
+	  var delta = f;
+	  var compare = f;
 
-	var lambda0$1, phi0, lambda1, phi1, // bounds
-	    lambda2, // previous lambda-coordinate
-	    lambda00$1, phi00$1, // first point
-	    p0, // previous 3D point
-	    deltaSum = adder(),
-	    ranges,
-	    range;
+	  if (f.length === 1) {
+	    delta = function delta(d, x) {
+	      return f(d) - x;
+	    };
 
-	var boundsStream = {
-	  point: boundsPoint,
-	  lineStart: boundsLineStart,
-	  lineEnd: boundsLineEnd,
-	  polygonStart: function() {
-	    boundsStream.point = boundsRingPoint;
-	    boundsStream.lineStart = boundsRingStart;
-	    boundsStream.lineEnd = boundsRingEnd;
-	    deltaSum.reset();
-	    areaStream.polygonStart();
-	  },
-	  polygonEnd: function() {
-	    areaStream.polygonEnd();
-	    boundsStream.point = boundsPoint;
-	    boundsStream.lineStart = boundsLineStart;
-	    boundsStream.lineEnd = boundsLineEnd;
-	    if (areaRingSum < 0) { lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90); }
-	    else if (deltaSum > epsilon) { phi1 = 90; }
-	    else if (deltaSum < -epsilon) { phi0 = -90; }
-	    range[0] = lambda0$1, range[1] = lambda1;
-	  },
-	  sphere: function() {
-	    lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
+	    compare = ascendingComparator(f);
 	  }
-	};
 
-	function boundsPoint(lambda, phi) {
-	  ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
-	  if (phi < phi0) { phi0 = phi; }
-	  if (phi > phi1) { phi1 = phi; }
-	}
+	  function left(a, x, lo, hi) {
+	    if (lo == null) lo = 0;
+	    if (hi == null) hi = a.length;
 
-	function linePoint(lambda, phi) {
-	  var p = cartesian([lambda * radians, phi * radians]);
-	  if (p0) {
-	    var normal = cartesianCross(p0, p),
-	        equatorial = [normal[1], -normal[0], 0],
-	        inflection = cartesianCross(equatorial, normal);
-	    cartesianNormalizeInPlace(inflection);
-	    inflection = spherical(inflection);
-	    var delta = lambda - lambda2,
-	        sign = delta > 0 ? 1 : -1,
-	        lambdai = inflection[0] * degrees * sign,
-	        phii,
-	        antimeridian = abs$2(delta) > 180;
-	    if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
-	      phii = inflection[1] * degrees;
-	      if (phii > phi1) { phi1 = phii; }
-	    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
-	      phii = -inflection[1] * degrees;
-	      if (phii < phi0) { phi0 = phii; }
-	    } else {
-	      if (phi < phi0) { phi0 = phi; }
-	      if (phi > phi1) { phi1 = phi; }
-	    }
-	    if (antimeridian) {
-	      if (lambda < lambda2) {
-	        if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) { lambda1 = lambda; }
-	      } else {
-	        if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) { lambda0$1 = lambda; }
-	      }
-	    } else {
-	      if (lambda1 >= lambda0$1) {
-	        if (lambda < lambda0$1) { lambda0$1 = lambda; }
-	        if (lambda > lambda1) { lambda1 = lambda; }
-	      } else {
-	        if (lambda > lambda2) {
-	          if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) { lambda1 = lambda; }
-	        } else {
-	          if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) { lambda0$1 = lambda; }
-	        }
-	      }
+	    while (lo < hi) {
+	      var mid = lo + hi >>> 1;
+	      if (compare(a[mid], x) < 0) lo = mid + 1;else hi = mid;
 	    }
-	  } else {
-	    ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
+
+	    return lo;
 	  }
-	  if (phi < phi0) { phi0 = phi; }
-	  if (phi > phi1) { phi1 = phi; }
-	  p0 = p, lambda2 = lambda;
-	}
 
-	function boundsLineStart() {
-	  boundsStream.point = linePoint;
-	}
+	  function right(a, x, lo, hi) {
+	    if (lo == null) lo = 0;
+	    if (hi == null) hi = a.length;
 
-	function boundsLineEnd() {
-	  range[0] = lambda0$1, range[1] = lambda1;
-	  boundsStream.point = boundsPoint;
-	  p0 = null;
-	}
+	    while (lo < hi) {
+	      var mid = lo + hi >>> 1;
+	      if (compare(a[mid], x) > 0) hi = mid;else lo = mid + 1;
+	    }
 
-	function boundsRingPoint(lambda, phi) {
-	  if (p0) {
-	    var delta = lambda - lambda2;
-	    deltaSum.add(abs$2(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
-	  } else {
-	    lambda00$1 = lambda, phi00$1 = phi;
+	    return lo;
 	  }
-	  areaStream.point(lambda, phi);
-	  linePoint(lambda, phi);
-	}
 
-	function boundsRingStart() {
-	  areaStream.lineStart();
-	}
+	  function center(a, x, lo, hi) {
+	    if (lo == null) lo = 0;
+	    if (hi == null) hi = a.length;
+	    var i = left(a, x, lo, hi - 1);
+	    return i > lo && delta(a[i - 1], x) > -delta(a[i], x) ? i - 1 : i;
+	  }
 
-	function boundsRingEnd() {
-	  boundsRingPoint(lambda00$1, phi00$1);
-	  areaStream.lineEnd();
-	  if (abs$2(deltaSum) > epsilon) { lambda0$1 = -(lambda1 = 180); }
-	  range[0] = lambda0$1, range[1] = lambda1;
-	  p0 = null;
+	  return {
+	    left: left,
+	    center: center,
+	    right: right
+	  };
 	}
 
-	// Finds the left-right distance between two longitudes.
-	// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
-	// the distance between ±180° to be 360°.
-	function angle(lambda0, lambda1) {
-	  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
+	function ascendingComparator(f) {
+	  return function (d, x) {
+	    return d3_ascending(f(d), x);
+	  };
 	}
 
-	function rangeCompare(a, b) {
-	  return a[0] - b[0];
-	}
+	var defineWellKnownSymbol = defineWellKnownSymbol$4;
 
-	function rangeContains(range, x) {
-	  return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
-	}
+	// `Symbol.asyncIterator` well-known symbol
+	// https://tc39.es/ecma262/#sec-symbol.asynciterator
+	defineWellKnownSymbol('asyncIterator');
 
-	function d3_geoBounds(feature) {
-	  var i, n, a, b, merged, deltaMax, delta;
+	var runtime = {exports: {}};
 
-	  phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
-	  ranges = [];
-	  d3_geoStream(feature, boundsStream);
+	(function (module) {
+	  var runtime = function (exports) {
 
-	  // First, sort ranges by their minimum longitudes.
-	  if (n = ranges.length) {
-	    ranges.sort(rangeCompare);
+	    var Op = Object.prototype;
+	    var hasOwn = Op.hasOwnProperty;
+	    var undefined$1; // More compressible than void 0.
 
-	    // Then, merge any ranges that overlap.
-	    for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
-	      b = ranges[i];
-	      if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
-	        if (angle(a[0], b[1]) > angle(a[0], a[1])) { a[1] = b[1]; }
-	        if (angle(b[0], a[1]) > angle(a[0], a[1])) { a[0] = b[0]; }
-	      } else {
-	        merged.push(a = b);
-	      }
+	    var $Symbol = typeof Symbol === "function" ? Symbol : {};
+	    var iteratorSymbol = $Symbol.iterator || "@@iterator";
+	    var asyncIteratorSymbol = $Symbol.asyncIterator || "@@asyncIterator";
+	    var toStringTagSymbol = $Symbol.toStringTag || "@@toStringTag";
+
+	    function define(obj, key, value) {
+	      Object.defineProperty(obj, key, {
+	        value: value,
+	        enumerable: true,
+	        configurable: true,
+	        writable: true
+	      });
+	      return obj[key];
 	    }
 
-	    // Finally, find the largest gap between the merged ranges.
-	    // The final bounding box will be the inverse of this gap.
-	    for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
-	      b = merged[i];
-	      if ((delta = angle(a[1], b[0])) > deltaMax) { deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1]; }
+	    try {
+	      // IE 8 has a broken Object.defineProperty that only works on DOM objects.
+	      define({}, "");
+	    } catch (err) {
+	      define = function define(obj, key, value) {
+	        return obj[key] = value;
+	      };
 	    }
-	  }
 
-	  ranges = range = null;
+	    function wrap(innerFn, outerFn, self, tryLocsList) {
+	      // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.
+	      var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;
+	      var generator = Object.create(protoGenerator.prototype);
+	      var context = new Context(tryLocsList || []); // The ._invoke method unifies the implementations of the .next,
+	      // .throw, and .return methods.
 
-	  return lambda0$1 === Infinity || phi0 === Infinity
-	      ? [[NaN, NaN], [NaN, NaN]]
-	      : [[lambda0$1, phi0], [lambda1, phi1]];
-	}
+	      generator._invoke = makeInvokeMethod(innerFn, self, context);
+	      return generator;
+	    }
 
-	var W0, W1,
-	    X0, Y0, Z0,
-	    X1, Y1, Z1,
-	    X2, Y2, Z2,
-	    lambda00$2, phi00$2, // first point
-	    x0, y0, z0; // previous point
+	    exports.wrap = wrap; // Try/catch helper to minimize deoptimizations. Returns a completion
+	    // record like context.tryEntries[i].completion. This interface could
+	    // have been (and was previously) designed to take a closure to be
+	    // invoked without arguments, but in all the cases we care about we
+	    // already have an existing method we want to call, so there's no need
+	    // to create a new function object. We can even get away with assuming
+	    // the method takes exactly one argument, since that happens to be true
+	    // in every case, so we don't have to touch the arguments object. The
+	    // only additional allocation required is the completion record, which
+	    // has a stable shape and so hopefully should be cheap to allocate.
 
-	var centroidStream = {
-	  sphere: noop$2,
-	  point: centroidPoint,
-	  lineStart: centroidLineStart,
-	  lineEnd: centroidLineEnd,
-	  polygonStart: function() {
-	    centroidStream.lineStart = centroidRingStart;
-	    centroidStream.lineEnd = centroidRingEnd;
-	  },
-	  polygonEnd: function() {
-	    centroidStream.lineStart = centroidLineStart;
-	    centroidStream.lineEnd = centroidLineEnd;
-	  }
-	};
+	    function tryCatch(fn, obj, arg) {
+	      try {
+	        return {
+	          type: "normal",
+	          arg: fn.call(obj, arg)
+	        };
+	      } catch (err) {
+	        return {
+	          type: "throw",
+	          arg: err
+	        };
+	      }
+	    }
 
-	// Arithmetic mean of Cartesian vectors.
-	function centroidPoint(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  var cosPhi = cos(phi);
-	  centroidPointCartesian(cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi));
-	}
+	    var GenStateSuspendedStart = "suspendedStart";
+	    var GenStateSuspendedYield = "suspendedYield";
+	    var GenStateExecuting = "executing";
+	    var GenStateCompleted = "completed"; // Returning this object from the innerFn has the same effect as
+	    // breaking out of the dispatch switch statement.
 
-	function centroidPointCartesian(x, y, z) {
-	  ++W0;
-	  X0 += (x - X0) / W0;
-	  Y0 += (y - Y0) / W0;
-	  Z0 += (z - Z0) / W0;
-	}
+	    var ContinueSentinel = {}; // Dummy constructor functions that we use as the .constructor and
+	    // .constructor.prototype properties for functions that return Generator
+	    // objects. For full spec compliance, you may wish to configure your
+	    // minifier not to mangle the names of these two functions.
 
-	function centroidLineStart() {
-	  centroidStream.point = centroidLinePointFirst;
-	}
+	    function Generator() {}
 
-	function centroidLinePointFirst(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  var cosPhi = cos(phi);
-	  x0 = cosPhi * cos(lambda);
-	  y0 = cosPhi * sin(lambda);
-	  z0 = sin(phi);
-	  centroidStream.point = centroidLinePoint;
-	  centroidPointCartesian(x0, y0, z0);
-	}
+	    function GeneratorFunction() {}
 
-	function centroidLinePoint(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  var cosPhi = cos(phi),
-	      x = cosPhi * cos(lambda),
-	      y = cosPhi * sin(lambda),
-	      z = sin(phi),
-	      w = atan2(sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);
-	  W1 += w;
-	  X1 += w * (x0 + (x0 = x));
-	  Y1 += w * (y0 + (y0 = y));
-	  Z1 += w * (z0 + (z0 = z));
-	  centroidPointCartesian(x0, y0, z0);
-	}
+	    function GeneratorFunctionPrototype() {} // This is a polyfill for %IteratorPrototype% for environments that
+	    // don't natively support it.
 
-	function centroidLineEnd() {
-	  centroidStream.point = centroidPoint;
-	}
 
-	// See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
-	// J. Applied Mechanics 42, 239 (1975).
-	function centroidRingStart() {
-	  centroidStream.point = centroidRingPointFirst;
-	}
+	    var IteratorPrototype = {};
+	    define(IteratorPrototype, iteratorSymbol, function () {
+	      return this;
+	    });
+	    var getProto = Object.getPrototypeOf;
+	    var NativeIteratorPrototype = getProto && getProto(getProto(values([])));
+
+	    if (NativeIteratorPrototype && NativeIteratorPrototype !== Op && hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {
+	      // This environment has a native %IteratorPrototype%; use it instead
+	      // of the polyfill.
+	      IteratorPrototype = NativeIteratorPrototype;
+	    }
+
+	    var Gp = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(IteratorPrototype);
+	    GeneratorFunction.prototype = GeneratorFunctionPrototype;
+	    define(Gp, "constructor", GeneratorFunctionPrototype);
+	    define(GeneratorFunctionPrototype, "constructor", GeneratorFunction);
+	    GeneratorFunction.displayName = define(GeneratorFunctionPrototype, toStringTagSymbol, "GeneratorFunction"); // Helper for defining the .next, .throw, and .return methods of the
+	    // Iterator interface in terms of a single ._invoke method.
+
+	    function defineIteratorMethods(prototype) {
+	      ["next", "throw", "return"].forEach(function (method) {
+	        define(prototype, method, function (arg) {
+	          return this._invoke(method, arg);
+	        });
+	      });
+	    }
 
-	function centroidRingEnd() {
-	  centroidRingPoint(lambda00$2, phi00$2);
-	  centroidStream.point = centroidPoint;
-	}
+	    exports.isGeneratorFunction = function (genFun) {
+	      var ctor = typeof genFun === "function" && genFun.constructor;
+	      return ctor ? ctor === GeneratorFunction || // For the native GeneratorFunction constructor, the best we can
+	      // do is to check its .name property.
+	      (ctor.displayName || ctor.name) === "GeneratorFunction" : false;
+	    };
 
-	function centroidRingPointFirst(lambda, phi) {
-	  lambda00$2 = lambda, phi00$2 = phi;
-	  lambda *= radians, phi *= radians;
-	  centroidStream.point = centroidRingPoint;
-	  var cosPhi = cos(phi);
-	  x0 = cosPhi * cos(lambda);
-	  y0 = cosPhi * sin(lambda);
-	  z0 = sin(phi);
-	  centroidPointCartesian(x0, y0, z0);
-	}
+	    exports.mark = function (genFun) {
+	      if (Object.setPrototypeOf) {
+	        Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);
+	      } else {
+	        genFun.__proto__ = GeneratorFunctionPrototype;
+	        define(genFun, toStringTagSymbol, "GeneratorFunction");
+	      }
 
-	function centroidRingPoint(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  var cosPhi = cos(phi),
-	      x = cosPhi * cos(lambda),
-	      y = cosPhi * sin(lambda),
-	      z = sin(phi),
-	      cx = y0 * z - z0 * y,
-	      cy = z0 * x - x0 * z,
-	      cz = x0 * y - y0 * x,
-	      m = sqrt(cx * cx + cy * cy + cz * cz),
-	      w = asin(m), // line weight = angle
-	      v = m && -w / m; // area weight multiplier
-	  X2 += v * cx;
-	  Y2 += v * cy;
-	  Z2 += v * cz;
-	  W1 += w;
-	  X1 += w * (x0 + (x0 = x));
-	  Y1 += w * (y0 + (y0 = y));
-	  Z1 += w * (z0 + (z0 = z));
-	  centroidPointCartesian(x0, y0, z0);
-	}
-
-	function d3_geoCentroid(object) {
-	  W0 = W1 =
-	  X0 = Y0 = Z0 =
-	  X1 = Y1 = Z1 =
-	  X2 = Y2 = Z2 = 0;
-	  d3_geoStream(object, centroidStream);
-
-	  var x = X2,
-	      y = Y2,
-	      z = Z2,
-	      m = x * x + y * y + z * z;
-
-	  // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.
-	  if (m < epsilon2) {
-	    x = X1, y = Y1, z = Z1;
-	    // If the feature has zero length, fall back to arithmetic mean of point vectors.
-	    if (W1 < epsilon) { x = X0, y = Y0, z = Z0; }
-	    m = x * x + y * y + z * z;
-	    // If the feature still has an undefined ccentroid, then return.
-	    if (m < epsilon2) { return [NaN, NaN]; }
-	  }
-
-	  return [atan2(y, x) * degrees, asin(z / sqrt(m)) * degrees];
-	}
-
-	function compose(a, b) {
+	      genFun.prototype = Object.create(Gp);
+	      return genFun;
+	    }; // Within the body of any async function, `await x` is transformed to
+	    // `yield regeneratorRuntime.awrap(x)`, so that the runtime can test
+	    // `hasOwn.call(value, "__await")` to determine if the yielded value is
+	    // meant to be awaited.
 
-	  function compose(x, y) {
-	    return x = a(x, y), b(x[0], x[1]);
-	  }
 
-	  if (a.invert && b.invert) { compose.invert = function(x, y) {
-	    return x = b.invert(x, y), x && a.invert(x[0], x[1]);
-	  }; }
+	    exports.awrap = function (arg) {
+	      return {
+	        __await: arg
+	      };
+	    };
 
-	  return compose;
-	}
+	    function AsyncIterator(generator, PromiseImpl) {
+	      function invoke(method, arg, resolve, reject) {
+	        var record = tryCatch(generator[method], generator, arg);
 
-	function rotationIdentity(lambda, phi) {
-	  return [abs$2(lambda) > pi ? lambda + Math.round(-lambda / tau) * tau : lambda, phi];
-	}
+	        if (record.type === "throw") {
+	          reject(record.arg);
+	        } else {
+	          var result = record.arg;
+	          var value = result.value;
+
+	          if (value && _typeof(value) === "object" && hasOwn.call(value, "__await")) {
+	            return PromiseImpl.resolve(value.__await).then(function (value) {
+	              invoke("next", value, resolve, reject);
+	            }, function (err) {
+	              invoke("throw", err, resolve, reject);
+	            });
+	          }
 
-	rotationIdentity.invert = rotationIdentity;
+	          return PromiseImpl.resolve(value).then(function (unwrapped) {
+	            // When a yielded Promise is resolved, its final value becomes
+	            // the .value of the Promise<{value,done}> result for the
+	            // current iteration.
+	            result.value = unwrapped;
+	            resolve(result);
+	          }, function (error) {
+	            // If a rejected Promise was yielded, throw the rejection back
+	            // into the async generator function so it can be handled there.
+	            return invoke("throw", error, resolve, reject);
+	          });
+	        }
+	      }
 
-	function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
-	  return (deltaLambda %= tau) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma))
-	    : rotationLambda(deltaLambda))
-	    : (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma)
-	    : rotationIdentity);
-	}
+	      var previousPromise;
 
-	function forwardRotationLambda(deltaLambda) {
-	  return function(lambda, phi) {
-	    return lambda += deltaLambda, [lambda > pi ? lambda - tau : lambda < -pi ? lambda + tau : lambda, phi];
-	  };
-	}
+	      function enqueue(method, arg) {
+	        function callInvokeWithMethodAndArg() {
+	          return new PromiseImpl(function (resolve, reject) {
+	            invoke(method, arg, resolve, reject);
+	          });
+	        }
 
-	function rotationLambda(deltaLambda) {
-	  var rotation = forwardRotationLambda(deltaLambda);
-	  rotation.invert = forwardRotationLambda(-deltaLambda);
-	  return rotation;
-	}
+	        return previousPromise = // If enqueue has been called before, then we want to wait until
+	        // all previous Promises have been resolved before calling invoke,
+	        // so that results are always delivered in the correct order. If
+	        // enqueue has not been called before, then it is important to
+	        // call invoke immediately, without waiting on a callback to fire,
+	        // so that the async generator function has the opportunity to do
+	        // any necessary setup in a predictable way. This predictability
+	        // is why the Promise constructor synchronously invokes its
+	        // executor callback, and why async functions synchronously
+	        // execute code before the first await. Since we implement simple
+	        // async functions in terms of async generators, it is especially
+	        // important to get this right, even though it requires care.
+	        previousPromise ? previousPromise.then(callInvokeWithMethodAndArg, // Avoid propagating failures to Promises returned by later
+	        // invocations of the iterator.
+	        callInvokeWithMethodAndArg) : callInvokeWithMethodAndArg();
+	      } // Define the unified helper method that is used to implement .next,
+	      // .throw, and .return (see defineIteratorMethods).
 
-	function rotationPhiGamma(deltaPhi, deltaGamma) {
-	  var cosDeltaPhi = cos(deltaPhi),
-	      sinDeltaPhi = sin(deltaPhi),
-	      cosDeltaGamma = cos(deltaGamma),
-	      sinDeltaGamma = sin(deltaGamma);
 
-	  function rotation(lambda, phi) {
-	    var cosPhi = cos(phi),
-	        x = cos(lambda) * cosPhi,
-	        y = sin(lambda) * cosPhi,
-	        z = sin(phi),
-	        k = z * cosDeltaPhi + x * sinDeltaPhi;
-	    return [
-	      atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi),
-	      asin(k * cosDeltaGamma + y * sinDeltaGamma)
-	    ];
-	  }
+	      this._invoke = enqueue;
+	    }
 
-	  rotation.invert = function(lambda, phi) {
-	    var cosPhi = cos(phi),
-	        x = cos(lambda) * cosPhi,
-	        y = sin(lambda) * cosPhi,
-	        z = sin(phi),
-	        k = z * cosDeltaGamma - y * sinDeltaGamma;
-	    return [
-	      atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi),
-	      asin(k * cosDeltaPhi - x * sinDeltaPhi)
-	    ];
-	  };
+	    defineIteratorMethods(AsyncIterator.prototype);
+	    define(AsyncIterator.prototype, asyncIteratorSymbol, function () {
+	      return this;
+	    });
+	    exports.AsyncIterator = AsyncIterator; // Note that simple async functions are implemented on top of
+	    // AsyncIterator objects; they just return a Promise for the value of
+	    // the final result produced by the iterator.
+
+	    exports.async = function (innerFn, outerFn, self, tryLocsList, PromiseImpl) {
+	      if (PromiseImpl === void 0) PromiseImpl = Promise;
+	      var iter = new AsyncIterator(wrap(innerFn, outerFn, self, tryLocsList), PromiseImpl);
+	      return exports.isGeneratorFunction(outerFn) ? iter // If outerFn is a generator, return the full iterator.
+	      : iter.next().then(function (result) {
+	        return result.done ? result.value : iter.next();
+	      });
+	    };
 
-	  return rotation;
-	}
+	    function makeInvokeMethod(innerFn, self, context) {
+	      var state = GenStateSuspendedStart;
+	      return function invoke(method, arg) {
+	        if (state === GenStateExecuting) {
+	          throw new Error("Generator is already running");
+	        }
 
-	function rotation(rotate) {
-	  rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);
+	        if (state === GenStateCompleted) {
+	          if (method === "throw") {
+	            throw arg;
+	          } // Be forgiving, per 25.3.3.3.3 of the spec:
+	          // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume
 
-	  function forward(coordinates) {
-	    coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
-	    return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
-	  }
 
-	  forward.invert = function(coordinates) {
-	    coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
-	    return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
-	  };
+	          return doneResult();
+	        }
 
-	  return forward;
-	}
+	        context.method = method;
+	        context.arg = arg;
 
-	// Generates a circle centered at [0°, 0°], with a given radius and precision.
-	function circleStream(stream, radius, delta, direction, t0, t1) {
-	  if (!delta) { return; }
-	  var cosRadius = cos(radius),
-	      sinRadius = sin(radius),
-	      step = direction * delta;
-	  if (t0 == null) {
-	    t0 = radius + direction * tau;
-	    t1 = radius - step / 2;
-	  } else {
-	    t0 = circleRadius(cosRadius, t0);
-	    t1 = circleRadius(cosRadius, t1);
-	    if (direction > 0 ? t0 < t1 : t0 > t1) { t0 += direction * tau; }
-	  }
-	  for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
-	    point = spherical([cosRadius, -sinRadius * cos(t), -sinRadius * sin(t)]);
-	    stream.point(point[0], point[1]);
-	  }
-	}
+	        while (true) {
+	          var delegate = context.delegate;
 
-	// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
-	function circleRadius(cosRadius, point) {
-	  point = cartesian(point), point[0] -= cosRadius;
-	  cartesianNormalizeInPlace(point);
-	  var radius = acos(-point[1]);
-	  return ((-point[2] < 0 ? -radius : radius) + tau - epsilon) % tau;
-	}
+	          if (delegate) {
+	            var delegateResult = maybeInvokeDelegate(delegate, context);
 
-	function clipBuffer() {
-	  var lines = [],
-	      line;
-	  return {
-	    point: function(x, y, m) {
-	      line.push([x, y, m]);
-	    },
-	    lineStart: function() {
-	      lines.push(line = []);
-	    },
-	    lineEnd: noop$2,
-	    rejoin: function() {
-	      if (lines.length > 1) { lines.push(lines.pop().concat(lines.shift())); }
-	    },
-	    result: function() {
-	      var result = lines;
-	      lines = [];
-	      line = null;
-	      return result;
-	    }
-	  };
-	}
+	            if (delegateResult) {
+	              if (delegateResult === ContinueSentinel) continue;
+	              return delegateResult;
+	            }
+	          }
 
-	function pointEqual(a, b) {
-	  return abs$2(a[0] - b[0]) < epsilon && abs$2(a[1] - b[1]) < epsilon;
-	}
+	          if (context.method === "next") {
+	            // Setting context._sent for legacy support of Babel's
+	            // function.sent implementation.
+	            context.sent = context._sent = context.arg;
+	          } else if (context.method === "throw") {
+	            if (state === GenStateSuspendedStart) {
+	              state = GenStateCompleted;
+	              throw context.arg;
+	            }
 
-	function Intersection(point, points, other, entry) {
-	  this.x = point;
-	  this.z = points;
-	  this.o = other; // another intersection
-	  this.e = entry; // is an entry?
-	  this.v = false; // visited
-	  this.n = this.p = null; // next & previous
-	}
+	            context.dispatchException(context.arg);
+	          } else if (context.method === "return") {
+	            context.abrupt("return", context.arg);
+	          }
 
-	// A generalized polygon clipping algorithm: given a polygon that has been cut
-	// into its visible line segments, and rejoins the segments by interpolating
-	// along the clip edge.
-	function clipRejoin(segments, compareIntersection, startInside, interpolate, stream) {
-	  var subject = [],
-	      clip = [],
-	      i,
-	      n;
+	          state = GenStateExecuting;
+	          var record = tryCatch(innerFn, self, context);
 
-	  segments.forEach(function(segment) {
-	    if ((n = segment.length - 1) <= 0) { return; }
-	    var n, p0 = segment[0], p1 = segment[n], x;
+	          if (record.type === "normal") {
+	            // If an exception is thrown from innerFn, we leave state ===
+	            // GenStateExecuting and loop back for another invocation.
+	            state = context.done ? GenStateCompleted : GenStateSuspendedYield;
 
-	    if (pointEqual(p0, p1)) {
-	      if (!p0[2] && !p1[2]) {
-	        stream.lineStart();
-	        for (i = 0; i < n; ++i) { stream.point((p0 = segment[i])[0], p0[1]); }
-	        stream.lineEnd();
-	        return;
-	      }
-	      // handle degenerate cases by moving the point
-	      p1[0] += 2 * epsilon;
-	    }
+	            if (record.arg === ContinueSentinel) {
+	              continue;
+	            }
 
-	    subject.push(x = new Intersection(p0, segment, null, true));
-	    clip.push(x.o = new Intersection(p0, null, x, false));
-	    subject.push(x = new Intersection(p1, segment, null, false));
-	    clip.push(x.o = new Intersection(p1, null, x, true));
-	  });
+	            return {
+	              value: record.arg,
+	              done: context.done
+	            };
+	          } else if (record.type === "throw") {
+	            state = GenStateCompleted; // Dispatch the exception by looping back around to the
+	            // context.dispatchException(context.arg) call above.
 
-	  if (!subject.length) { return; }
+	            context.method = "throw";
+	            context.arg = record.arg;
+	          }
+	        }
+	      };
+	    } // Call delegate.iterator[context.method](context.arg) and handle the
+	    // result, either by returning a { value, done } result from the
+	    // delegate iterator, or by modifying context.method and context.arg,
+	    // setting context.delegate to null, and returning the ContinueSentinel.
+
+
+	    function maybeInvokeDelegate(delegate, context) {
+	      var method = delegate.iterator[context.method];
+
+	      if (method === undefined$1) {
+	        // A .throw or .return when the delegate iterator has no .throw
+	        // method always terminates the yield* loop.
+	        context.delegate = null;
+
+	        if (context.method === "throw") {
+	          // Note: ["return"] must be used for ES3 parsing compatibility.
+	          if (delegate.iterator["return"]) {
+	            // If the delegate iterator has a return method, give it a
+	            // chance to clean up.
+	            context.method = "return";
+	            context.arg = undefined$1;
+	            maybeInvokeDelegate(delegate, context);
+
+	            if (context.method === "throw") {
+	              // If maybeInvokeDelegate(context) changed context.method from
+	              // "return" to "throw", let that override the TypeError below.
+	              return ContinueSentinel;
+	            }
+	          }
 
-	  clip.sort(compareIntersection);
-	  link(subject);
-	  link(clip);
+	          context.method = "throw";
+	          context.arg = new TypeError("The iterator does not provide a 'throw' method");
+	        }
 
-	  for (i = 0, n = clip.length; i < n; ++i) {
-	    clip[i].e = startInside = !startInside;
-	  }
+	        return ContinueSentinel;
+	      }
 
-	  var start = subject[0],
-	      points,
-	      point;
+	      var record = tryCatch(method, delegate.iterator, context.arg);
 
-	  while (1) {
-	    // Find first unvisited intersection.
-	    var current = start,
-	        isSubject = true;
-	    while (current.v) { if ((current = current.n) === start) { return; } }
-	    points = current.z;
-	    stream.lineStart();
-	    do {
-	      current.v = current.o.v = true;
-	      if (current.e) {
-	        if (isSubject) {
-	          for (i = 0, n = points.length; i < n; ++i) { stream.point((point = points[i])[0], point[1]); }
-	        } else {
-	          interpolate(current.x, current.n.x, 1, stream);
+	      if (record.type === "throw") {
+	        context.method = "throw";
+	        context.arg = record.arg;
+	        context.delegate = null;
+	        return ContinueSentinel;
+	      }
+
+	      var info = record.arg;
+
+	      if (!info) {
+	        context.method = "throw";
+	        context.arg = new TypeError("iterator result is not an object");
+	        context.delegate = null;
+	        return ContinueSentinel;
+	      }
+
+	      if (info.done) {
+	        // Assign the result of the finished delegate to the temporary
+	        // variable specified by delegate.resultName (see delegateYield).
+	        context[delegate.resultName] = info.value; // Resume execution at the desired location (see delegateYield).
+
+	        context.next = delegate.nextLoc; // If context.method was "throw" but the delegate handled the
+	        // exception, let the outer generator proceed normally. If
+	        // context.method was "next", forget context.arg since it has been
+	        // "consumed" by the delegate iterator. If context.method was
+	        // "return", allow the original .return call to continue in the
+	        // outer generator.
+
+	        if (context.method !== "return") {
+	          context.method = "next";
+	          context.arg = undefined$1;
 	        }
-	        current = current.n;
 	      } else {
-	        if (isSubject) {
-	          points = current.p.z;
-	          for (i = points.length - 1; i >= 0; --i) { stream.point((point = points[i])[0], point[1]); }
-	        } else {
-	          interpolate(current.x, current.p.x, -1, stream);
-	        }
-	        current = current.p;
+	        // Re-yield the result returned by the delegate method.
+	        return info;
+	      } // The delegate iterator is finished, so forget it and continue with
+	      // the outer generator.
+
+
+	      context.delegate = null;
+	      return ContinueSentinel;
+	    } // Define Generator.prototype.{next,throw,return} in terms of the
+	    // unified ._invoke helper method.
+
+
+	    defineIteratorMethods(Gp);
+	    define(Gp, toStringTagSymbol, "Generator"); // A Generator should always return itself as the iterator object when the
+	    // @@iterator function is called on it. Some browsers' implementations of the
+	    // iterator prototype chain incorrectly implement this, causing the Generator
+	    // object to not be returned from this call. This ensures that doesn't happen.
+	    // See https://github.com/facebook/regenerator/issues/274 for more details.
+
+	    define(Gp, iteratorSymbol, function () {
+	      return this;
+	    });
+	    define(Gp, "toString", function () {
+	      return "[object Generator]";
+	    });
+
+	    function pushTryEntry(locs) {
+	      var entry = {
+	        tryLoc: locs[0]
+	      };
+
+	      if (1 in locs) {
+	        entry.catchLoc = locs[1];
 	      }
-	      current = current.o;
-	      points = current.z;
-	      isSubject = !isSubject;
-	    } while (!current.v);
-	    stream.lineEnd();
-	  }
-	}
 
-	function link(array) {
-	  if (!(n = array.length)) { return; }
-	  var n,
-	      i = 0,
-	      a = array[0],
-	      b;
-	  while (++i < n) {
-	    a.n = b = array[i];
-	    b.p = a;
-	    a = b;
-	  }
-	  a.n = b = array[0];
-	  b.p = a;
-	}
+	      if (2 in locs) {
+	        entry.finallyLoc = locs[2];
+	        entry.afterLoc = locs[3];
+	      }
 
-	var sum = adder();
+	      this.tryEntries.push(entry);
+	    }
 
-	function longitude(point) {
-	  if (abs$2(point[0]) <= pi)
-	    { return point[0]; }
-	  else
-	    { return sign$2(point[0]) * ((abs$2(point[0]) + pi) % tau - pi); }
-	}
+	    function resetTryEntry(entry) {
+	      var record = entry.completion || {};
+	      record.type = "normal";
+	      delete record.arg;
+	      entry.completion = record;
+	    }
 
-	function polygonContains(polygon, point) {
-	  var lambda = longitude(point),
-	      phi = point[1],
-	      sinPhi = sin(phi),
-	      normal = [sin(lambda), -cos(lambda), 0],
-	      angle = 0,
-	      winding = 0;
+	    function Context(tryLocsList) {
+	      // The root entry object (effectively a try statement without a catch
+	      // or a finally block) gives us a place to store values thrown from
+	      // locations where there is no enclosing try statement.
+	      this.tryEntries = [{
+	        tryLoc: "root"
+	      }];
+	      tryLocsList.forEach(pushTryEntry, this);
+	      this.reset(true);
+	    }
 
-	  sum.reset();
+	    exports.keys = function (object) {
+	      var keys = [];
 
-	  if (sinPhi === 1) { phi = halfPi + epsilon; }
-	  else if (sinPhi === -1) { phi = -halfPi - epsilon; }
+	      for (var key in object) {
+	        keys.push(key);
+	      }
 
-	  for (var i = 0, n = polygon.length; i < n; ++i) {
-	    if (!(m = (ring = polygon[i]).length)) { continue; }
-	    var ring,
-	        m,
-	        point0 = ring[m - 1],
-	        lambda0 = longitude(point0),
-	        phi0 = point0[1] / 2 + quarterPi,
-	        sinPhi0 = sin(phi0),
-	        cosPhi0 = cos(phi0);
+	      keys.reverse(); // Rather than returning an object with a next method, we keep
+	      // things simple and return the next function itself.
 
-	    for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
-	      var point1 = ring[j],
-	          lambda1 = longitude(point1),
-	          phi1 = point1[1] / 2 + quarterPi,
-	          sinPhi1 = sin(phi1),
-	          cosPhi1 = cos(phi1),
-	          delta = lambda1 - lambda0,
-	          sign = delta >= 0 ? 1 : -1,
-	          absDelta = sign * delta,
-	          antimeridian = absDelta > pi,
-	          k = sinPhi0 * sinPhi1;
+	      return function next() {
+	        while (keys.length) {
+	          var key = keys.pop();
 
-	      sum.add(atan2(k * sign * sin(absDelta), cosPhi0 * cosPhi1 + k * cos(absDelta)));
-	      angle += antimeridian ? delta + sign * tau : delta;
+	          if (key in object) {
+	            next.value = key;
+	            next.done = false;
+	            return next;
+	          }
+	        } // To avoid creating an additional object, we just hang the .value
+	        // and .done properties off the next function object itself. This
+	        // also ensures that the minifier will not anonymize the function.
 
-	      // Are the longitudes either side of the point’s meridian (lambda),
-	      // and are the latitudes smaller than the parallel (phi)?
-	      if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
-	        var arc = cartesianCross(cartesian(point0), cartesian(point1));
-	        cartesianNormalizeInPlace(arc);
-	        var intersection = cartesianCross(normal, arc);
-	        cartesianNormalizeInPlace(intersection);
-	        var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);
-	        if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
-	          winding += antimeridian ^ delta >= 0 ? 1 : -1;
+
+	        next.done = true;
+	        return next;
+	      };
+	    };
+
+	    function values(iterable) {
+	      if (iterable) {
+	        var iteratorMethod = iterable[iteratorSymbol];
+
+	        if (iteratorMethod) {
+	          return iteratorMethod.call(iterable);
+	        }
+
+	        if (typeof iterable.next === "function") {
+	          return iterable;
+	        }
+
+	        if (!isNaN(iterable.length)) {
+	          var i = -1,
+	              next = function next() {
+	            while (++i < iterable.length) {
+	              if (hasOwn.call(iterable, i)) {
+	                next.value = iterable[i];
+	                next.done = false;
+	                return next;
+	              }
+	            }
+
+	            next.value = undefined$1;
+	            next.done = true;
+	            return next;
+	          };
+
+	          return next.next = next;
+	        }
+	      } // Return an iterator with no values.
+
+
+	      return {
+	        next: doneResult
+	      };
+	    }
+
+	    exports.values = values;
+
+	    function doneResult() {
+	      return {
+	        value: undefined$1,
+	        done: true
+	      };
+	    }
+
+	    Context.prototype = {
+	      constructor: Context,
+	      reset: function reset(skipTempReset) {
+	        this.prev = 0;
+	        this.next = 0; // Resetting context._sent for legacy support of Babel's
+	        // function.sent implementation.
+
+	        this.sent = this._sent = undefined$1;
+	        this.done = false;
+	        this.delegate = null;
+	        this.method = "next";
+	        this.arg = undefined$1;
+	        this.tryEntries.forEach(resetTryEntry);
+
+	        if (!skipTempReset) {
+	          for (var name in this) {
+	            // Not sure about the optimal order of these conditions:
+	            if (name.charAt(0) === "t" && hasOwn.call(this, name) && !isNaN(+name.slice(1))) {
+	              this[name] = undefined$1;
+	            }
+	          }
+	        }
+	      },
+	      stop: function stop() {
+	        this.done = true;
+	        var rootEntry = this.tryEntries[0];
+	        var rootRecord = rootEntry.completion;
+
+	        if (rootRecord.type === "throw") {
+	          throw rootRecord.arg;
+	        }
+
+	        return this.rval;
+	      },
+	      dispatchException: function dispatchException(exception) {
+	        if (this.done) {
+	          throw exception;
+	        }
+
+	        var context = this;
+
+	        function handle(loc, caught) {
+	          record.type = "throw";
+	          record.arg = exception;
+	          context.next = loc;
+
+	          if (caught) {
+	            // If the dispatched exception was caught by a catch block,
+	            // then let that catch block handle the exception normally.
+	            context.method = "next";
+	            context.arg = undefined$1;
+	          }
+
+	          return !!caught;
+	        }
+
+	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+	          var entry = this.tryEntries[i];
+	          var record = entry.completion;
+
+	          if (entry.tryLoc === "root") {
+	            // Exception thrown outside of any try block that could handle
+	            // it, so set the completion value of the entire function to
+	            // throw the exception.
+	            return handle("end");
+	          }
+
+	          if (entry.tryLoc <= this.prev) {
+	            var hasCatch = hasOwn.call(entry, "catchLoc");
+	            var hasFinally = hasOwn.call(entry, "finallyLoc");
+
+	            if (hasCatch && hasFinally) {
+	              if (this.prev < entry.catchLoc) {
+	                return handle(entry.catchLoc, true);
+	              } else if (this.prev < entry.finallyLoc) {
+	                return handle(entry.finallyLoc);
+	              }
+	            } else if (hasCatch) {
+	              if (this.prev < entry.catchLoc) {
+	                return handle(entry.catchLoc, true);
+	              }
+	            } else if (hasFinally) {
+	              if (this.prev < entry.finallyLoc) {
+	                return handle(entry.finallyLoc);
+	              }
+	            } else {
+	              throw new Error("try statement without catch or finally");
+	            }
+	          }
+	        }
+	      },
+	      abrupt: function abrupt(type, arg) {
+	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+	          var entry = this.tryEntries[i];
+
+	          if (entry.tryLoc <= this.prev && hasOwn.call(entry, "finallyLoc") && this.prev < entry.finallyLoc) {
+	            var finallyEntry = entry;
+	            break;
+	          }
+	        }
+
+	        if (finallyEntry && (type === "break" || type === "continue") && finallyEntry.tryLoc <= arg && arg <= finallyEntry.finallyLoc) {
+	          // Ignore the finally entry if control is not jumping to a
+	          // location outside the try/catch block.
+	          finallyEntry = null;
+	        }
+
+	        var record = finallyEntry ? finallyEntry.completion : {};
+	        record.type = type;
+	        record.arg = arg;
+
+	        if (finallyEntry) {
+	          this.method = "next";
+	          this.next = finallyEntry.finallyLoc;
+	          return ContinueSentinel;
+	        }
+
+	        return this.complete(record);
+	      },
+	      complete: function complete(record, afterLoc) {
+	        if (record.type === "throw") {
+	          throw record.arg;
+	        }
+
+	        if (record.type === "break" || record.type === "continue") {
+	          this.next = record.arg;
+	        } else if (record.type === "return") {
+	          this.rval = this.arg = record.arg;
+	          this.method = "return";
+	          this.next = "end";
+	        } else if (record.type === "normal" && afterLoc) {
+	          this.next = afterLoc;
+	        }
+
+	        return ContinueSentinel;
+	      },
+	      finish: function finish(finallyLoc) {
+	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+	          var entry = this.tryEntries[i];
+
+	          if (entry.finallyLoc === finallyLoc) {
+	            this.complete(entry.completion, entry.afterLoc);
+	            resetTryEntry(entry);
+	            return ContinueSentinel;
+	          }
+	        }
+	      },
+	      "catch": function _catch(tryLoc) {
+	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+	          var entry = this.tryEntries[i];
+
+	          if (entry.tryLoc === tryLoc) {
+	            var record = entry.completion;
+
+	            if (record.type === "throw") {
+	              var thrown = record.arg;
+	              resetTryEntry(entry);
+	            }
+
+	            return thrown;
+	          }
+	        } // The context.catch method must only be called with a location
+	        // argument that corresponds to a known catch block.
+
+
+	        throw new Error("illegal catch attempt");
+	      },
+	      delegateYield: function delegateYield(iterable, resultName, nextLoc) {
+	        this.delegate = {
+	          iterator: values(iterable),
+	          resultName: resultName,
+	          nextLoc: nextLoc
+	        };
+
+	        if (this.method === "next") {
+	          // Deliberately forget the last sent value so that we don't
+	          // accidentally pass it on to the delegate.
+	          this.arg = undefined$1;
 	        }
+
+	        return ContinueSentinel;
 	      }
+	    }; // Regardless of whether this script is executing as a CommonJS module
+	    // or not, return the runtime object so that we can declare the variable
+	    // regeneratorRuntime in the outer scope, which allows this module to be
+	    // injected easily by `bin/regenerator --include-runtime script.js`.
+
+	    return exports;
+	  }( // If this script is executing as a CommonJS module, use module.exports
+	  // as the regeneratorRuntime namespace. Otherwise create a new empty
+	  // object. Either way, the resulting object will be used to initialize
+	  // the regeneratorRuntime variable at the top of this file.
+	  module.exports );
+
+	  try {
+	    regeneratorRuntime = runtime;
+	  } catch (accidentalStrictMode) {
+	    // This module should not be running in strict mode, so the above
+	    // assignment should always work unless something is misconfigured. Just
+	    // in case runtime.js accidentally runs in strict mode, in modern engines
+	    // we can explicitly access globalThis. In older engines we can escape
+	    // strict mode using a global Function call. This could conceivably fail
+	    // if a Content Security Policy forbids using Function, but in that case
+	    // the proper solution is to fix the accidental strict mode problem. If
+	    // you've misconfigured your bundler to force strict mode and applied a
+	    // CSP to forbid Function, and you're not willing to fix either of those
+	    // problems, please detail your unique predicament in a GitHub issue.
+	    if ((typeof globalThis === "undefined" ? "undefined" : _typeof(globalThis)) === "object") {
+	      globalThis.regeneratorRuntime = runtime;
+	    } else {
+	      Function("r", "regeneratorRuntime = r")(runtime);
 	    }
 	  }
+	})(runtime);
 
-	  // First, determine whether the South pole is inside or outside:
-	  //
-	  // It is inside if:
-	  // * the polygon winds around it in a clockwise direction.
-	  // * the polygon does not (cumulatively) wind around it, but has a negative
-	  //   (counter-clockwise) area.
-	  //
-	  // Second, count the (signed) number of times a segment crosses a lambda
-	  // from the point to the South pole.  If it is zero, then the point is the
-	  // same side as the South pole.
+	var _marked$3 = /*#__PURE__*/regeneratorRuntime.mark(numbers);
 
-	  return (angle < -epsilon || angle < epsilon && sum < -epsilon) ^ (winding & 1);
+	function number$1 (x) {
+	  return x === null ? NaN : +x;
 	}
+	function numbers(values, valueof) {
+	  var _iterator, _step, value, index, _iterator2, _step2, _value;
 
-	function d3_ascending(a, b) {
-	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
-	}
+	  return regeneratorRuntime.wrap(function numbers$(_context) {
+	    while (1) {
+	      switch (_context.prev = _context.next) {
+	        case 0:
+	          if (!(valueof === undefined)) {
+	            _context.next = 21;
+	            break;
+	          }
 
-	function d3_bisector(compare) {
-	  if (compare.length === 1) { compare = ascendingComparator(compare); }
-	  return {
-	    left: function(a, x, lo, hi) {
-	      if (lo == null) { lo = 0; }
-	      if (hi == null) { hi = a.length; }
-	      while (lo < hi) {
-	        var mid = lo + hi >>> 1;
-	        if (compare(a[mid], x) < 0) { lo = mid + 1; }
-	        else { hi = mid; }
-	      }
-	      return lo;
-	    },
-	    right: function(a, x, lo, hi) {
-	      if (lo == null) { lo = 0; }
-	      if (hi == null) { hi = a.length; }
-	      while (lo < hi) {
-	        var mid = lo + hi >>> 1;
-	        if (compare(a[mid], x) > 0) { hi = mid; }
-	        else { lo = mid + 1; }
+	          _iterator = _createForOfIteratorHelper(values);
+	          _context.prev = 2;
+
+	          _iterator.s();
+
+	        case 4:
+	          if ((_step = _iterator.n()).done) {
+	            _context.next = 11;
+	            break;
+	          }
+
+	          value = _step.value;
+
+	          if (!(value != null && (value = +value) >= value)) {
+	            _context.next = 9;
+	            break;
+	          }
+
+	          _context.next = 9;
+	          return value;
+
+	        case 9:
+	          _context.next = 4;
+	          break;
+
+	        case 11:
+	          _context.next = 16;
+	          break;
+
+	        case 13:
+	          _context.prev = 13;
+	          _context.t0 = _context["catch"](2);
+
+	          _iterator.e(_context.t0);
+
+	        case 16:
+	          _context.prev = 16;
+
+	          _iterator.f();
+
+	          return _context.finish(16);
+
+	        case 19:
+	          _context.next = 40;
+	          break;
+
+	        case 21:
+	          index = -1;
+	          _iterator2 = _createForOfIteratorHelper(values);
+	          _context.prev = 23;
+
+	          _iterator2.s();
+
+	        case 25:
+	          if ((_step2 = _iterator2.n()).done) {
+	            _context.next = 32;
+	            break;
+	          }
+
+	          _value = _step2.value;
+
+	          if (!((_value = valueof(_value, ++index, values)) != null && (_value = +_value) >= _value)) {
+	            _context.next = 30;
+	            break;
+	          }
+
+	          _context.next = 30;
+	          return _value;
+
+	        case 30:
+	          _context.next = 25;
+	          break;
+
+	        case 32:
+	          _context.next = 37;
+	          break;
+
+	        case 34:
+	          _context.prev = 34;
+	          _context.t1 = _context["catch"](23);
+
+	          _iterator2.e(_context.t1);
+
+	        case 37:
+	          _context.prev = 37;
+
+	          _iterator2.f();
+
+	          return _context.finish(37);
+
+	        case 40:
+	        case "end":
+	          return _context.stop();
 	      }
-	      return lo;
 	    }
-	  };
-	}
-
-	function ascendingComparator(f) {
-	  return function(d, x) {
-	    return d3_ascending(f(d), x);
-	  };
+	  }, _marked$3, null, [[2, 13, 16, 19], [23, 34, 37, 40]]);
 	}
 
 	var ascendingBisect = d3_bisector(d3_ascending);
 	var bisectRight = ascendingBisect.right;
+	d3_bisector(number$1).center;
+
+	var anObject$2 = anObject$n;
+	var iteratorClose = iteratorClose$2;
+
+	// call something on iterator step with safe closing on error
+	var callWithSafeIterationClosing$1 = function (iterator, fn, value, ENTRIES) {
+	  try {
+	    return ENTRIES ? fn(anObject$2(value)[0], value[1]) : fn(value);
+	  } catch (error) {
+	    iteratorClose(iterator, 'throw', error);
+	  }
+	};
+
+	var global$c = global$1o;
+	var bind$5 = functionBindContext;
+	var call$3 = functionCall;
+	var toObject$3 = toObject$i;
+	var callWithSafeIterationClosing = callWithSafeIterationClosing$1;
+	var isArrayIteratorMethod = isArrayIteratorMethod$3;
+	var isConstructor = isConstructor$4;
+	var lengthOfArrayLike$3 = lengthOfArrayLike$i;
+	var createProperty = createProperty$5;
+	var getIterator = getIterator$4;
+	var getIteratorMethod = getIteratorMethod$5;
+
+	var Array$1 = global$c.Array;
+
+	// `Array.from` method implementation
+	// https://tc39.es/ecma262/#sec-array.from
+	var arrayFrom$1 = function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {
+	  var O = toObject$3(arrayLike);
+	  var IS_CONSTRUCTOR = isConstructor(this);
+	  var argumentsLength = arguments.length;
+	  var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
+	  var mapping = mapfn !== undefined;
+	  if (mapping) mapfn = bind$5(mapfn, argumentsLength > 2 ? arguments[2] : undefined);
+	  var iteratorMethod = getIteratorMethod(O);
+	  var index = 0;
+	  var length, result, step, iterator, next, value;
+	  // if the target is not iterable or it's an array with the default iterator - use a simple case
+	  if (iteratorMethod && !(this == Array$1 && isArrayIteratorMethod(iteratorMethod))) {
+	    iterator = getIterator(O, iteratorMethod);
+	    next = iterator.next;
+	    result = IS_CONSTRUCTOR ? new this() : [];
+	    for (;!(step = call$3(next, iterator)).done; index++) {
+	      value = mapping ? callWithSafeIterationClosing(iterator, mapfn, [step.value, index], true) : step.value;
+	      createProperty(result, index, value);
+	    }
+	  } else {
+	    length = lengthOfArrayLike$3(O);
+	    result = IS_CONSTRUCTOR ? new this(length) : Array$1(length);
+	    for (;length > index; index++) {
+	      value = mapping ? mapfn(O[index], index) : O[index];
+	      createProperty(result, index, value);
+	    }
+	  }
+	  result.length = index;
+	  return result;
+	};
+
+	var $$D = _export;
+	var from = arrayFrom$1;
+	var checkCorrectnessOfIteration = checkCorrectnessOfIteration$4;
+
+	var INCORRECT_ITERATION = !checkCorrectnessOfIteration(function (iterable) {
+	  // eslint-disable-next-line es/no-array-from -- required for testing
+	  Array.from(iterable);
+	});
+
+	// `Array.from` method
+	// https://tc39.es/ecma262/#sec-array.from
+	$$D({ target: 'Array', stat: true, forced: INCORRECT_ITERATION }, {
+	  from: from
+	});
+
+	var $$C = _export;
+	var fill = arrayFill$1;
+	var addToUnscopables$4 = addToUnscopables$6;
+
+	// `Array.prototype.fill` method
+	// https://tc39.es/ecma262/#sec-array.prototype.fill
+	$$C({ target: 'Array', proto: true }, {
+	  fill: fill
+	});
+
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables$4('fill');
+
+	var $$B = _export;
+	var $some = arrayIteration.some;
+	var arrayMethodIsStrict$4 = arrayMethodIsStrict$9;
+
+	var STRICT_METHOD$4 = arrayMethodIsStrict$4('some');
 
-	function d3_descending(a, b) {
+	// `Array.prototype.some` method
+	// https://tc39.es/ecma262/#sec-array.prototype.some
+	$$B({ target: 'Array', proto: true, forced: !STRICT_METHOD$4 }, {
+	  some: function some(callbackfn /* , thisArg */) {
+	    return $some(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
+
+	var TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS = typedArrayConstructorsRequireWrappers;
+	var exportTypedArrayStaticMethod = arrayBufferViewCore.exportTypedArrayStaticMethod;
+	var typedArrayFrom = typedArrayFrom$2;
+
+	// `%TypedArray%.from` method
+	// https://tc39.es/ecma262/#sec-%typedarray%.from
+	exportTypedArrayStaticMethod('from', typedArrayFrom, TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS);
+
+	var createTypedArrayConstructor = typedArrayConstructor.exports;
+
+	// `Float64Array` constructor
+	// https://tc39.es/ecma262/#sec-typedarray-objects
+	createTypedArrayConstructor('Float64', function (init) {
+	  return function Float64Array(data, byteOffset, length) {
+	    return init(this, data, byteOffset, length);
+	  };
+	});
+
+	function d3_descending (a, b) {
 	  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
 	}
 
-	function number(x) {
-	  return x === null ? NaN : +x;
-	}
+	// https://github.com/python/cpython/blob/a74eea238f5baba15797e2e8b570d153bc8690a7/Modules/mathmodule.c#L1423
+	var Adder = /*#__PURE__*/function () {
+	  function Adder() {
+	    _classCallCheck$1(this, Adder);
 
-	function range$1(start, stop, step) {
-	  start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;
+	    this._partials = new Float64Array(32);
+	    this._n = 0;
+	  }
 
-	  var i = -1,
-	      n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
-	      range = new Array(n);
+	  _createClass$1(Adder, [{
+	    key: "add",
+	    value: function add(x) {
+	      var p = this._partials;
+	      var i = 0;
 
-	  while (++i < n) {
-	    range[i] = start + i * step;
+	      for (var j = 0; j < this._n && j < 32; j++) {
+	        var y = p[j],
+	            hi = x + y,
+	            lo = Math.abs(x) < Math.abs(y) ? x - (hi - y) : y - (hi - x);
+	        if (lo) p[i++] = lo;
+	        x = hi;
+	      }
+
+	      p[i] = x;
+	      this._n = i + 1;
+	      return this;
+	    }
+	  }, {
+	    key: "valueOf",
+	    value: function valueOf() {
+	      var p = this._partials;
+	      var n = this._n,
+	          x,
+	          y,
+	          lo,
+	          hi = 0;
+
+	      if (n > 0) {
+	        hi = p[--n];
+
+	        while (n > 0) {
+	          x = hi;
+	          y = p[--n];
+	          hi = x + y;
+	          lo = y - (hi - x);
+	          if (lo) break;
+	        }
+
+	        if (n > 0 && (lo < 0 && p[n - 1] < 0 || lo > 0 && p[n - 1] > 0)) {
+	          y = lo * 2;
+	          x = hi + y;
+	          if (y == x - hi) hi = x;
+	        }
+	      }
+
+	      return hi;
+	    }
+	  }]);
+
+	  return Adder;
+	}();
+
+	var $$A = _export;
+	var DESCRIPTORS$5 = descriptors;
+	var defineProperties$1 = objectDefineProperties.f;
+
+	// `Object.defineProperties` method
+	// https://tc39.es/ecma262/#sec-object.defineproperties
+	// eslint-disable-next-line es/no-object-defineproperties -- safe
+	$$A({ target: 'Object', stat: true, forced: Object.defineProperties !== defineProperties$1, sham: !DESCRIPTORS$5 }, {
+	  defineProperties: defineProperties$1
+	});
+
+	var collection = collection$2;
+	var collectionStrong = collectionStrong$2;
+
+	// `Map` constructor
+	// https://tc39.es/ecma262/#sec-map-objects
+	collection('Map', function (init) {
+	  return function Map() { return init(this, arguments.length ? arguments[0] : undefined); };
+	}, collectionStrong);
+
+	var $$z = _export;
+	var uncurryThis$f = functionUncurryThis;
+	var aCallable$1 = aCallable$a;
+	var toObject$2 = toObject$i;
+	var lengthOfArrayLike$2 = lengthOfArrayLike$i;
+	var toString$a = toString$k;
+	var fails$b = fails$V;
+	var internalSort = arraySort$1;
+	var arrayMethodIsStrict$3 = arrayMethodIsStrict$9;
+	var FF = engineFfVersion;
+	var IE_OR_EDGE = engineIsIeOrEdge;
+	var V8 = engineV8Version;
+	var WEBKIT = engineWebkitVersion;
+
+	var test = [];
+	var un$Sort = uncurryThis$f(test.sort);
+	var push$3 = uncurryThis$f(test.push);
+
+	// IE8-
+	var FAILS_ON_UNDEFINED = fails$b(function () {
+	  test.sort(undefined);
+	});
+	// V8 bug
+	var FAILS_ON_NULL = fails$b(function () {
+	  test.sort(null);
+	});
+	// Old WebKit
+	var STRICT_METHOD$3 = arrayMethodIsStrict$3('sort');
+
+	var STABLE_SORT = !fails$b(function () {
+	  // feature detection can be too slow, so check engines versions
+	  if (V8) return V8 < 70;
+	  if (FF && FF > 3) return;
+	  if (IE_OR_EDGE) return true;
+	  if (WEBKIT) return WEBKIT < 603;
+
+	  var result = '';
+	  var code, chr, value, index;
+
+	  // generate an array with more 512 elements (Chakra and old V8 fails only in this case)
+	  for (code = 65; code < 76; code++) {
+	    chr = String.fromCharCode(code);
+
+	    switch (code) {
+	      case 66: case 69: case 70: case 72: value = 3; break;
+	      case 68: case 71: value = 4; break;
+	      default: value = 2;
+	    }
+
+	    for (index = 0; index < 47; index++) {
+	      test.push({ k: chr + index, v: value });
+	    }
 	  }
 
-	  return range;
-	}
+	  test.sort(function (a, b) { return b.v - a.v; });
+
+	  for (index = 0; index < test.length; index++) {
+	    chr = test[index].k.charAt(0);
+	    if (result.charAt(result.length - 1) !== chr) result += chr;
+	  }
+
+	  return result !== 'DGBEFHACIJK';
+	});
+
+	var FORCED$7 = FAILS_ON_UNDEFINED || !FAILS_ON_NULL || !STRICT_METHOD$3 || !STABLE_SORT;
+
+	var getSortCompare = function (comparefn) {
+	  return function (x, y) {
+	    if (y === undefined) return -1;
+	    if (x === undefined) return 1;
+	    if (comparefn !== undefined) return +comparefn(x, y) || 0;
+	    return toString$a(x) > toString$a(y) ? 1 : -1;
+	  };
+	};
+
+	// `Array.prototype.sort` method
+	// https://tc39.es/ecma262/#sec-array.prototype.sort
+	$$z({ target: 'Array', proto: true, forced: FORCED$7 }, {
+	  sort: function sort(comparefn) {
+	    if (comparefn !== undefined) aCallable$1(comparefn);
+
+	    var array = toObject$2(this);
+
+	    if (STABLE_SORT) return comparefn === undefined ? un$Sort(array) : un$Sort(array, comparefn);
+
+	    var items = [];
+	    var arrayLength = lengthOfArrayLike$2(array);
+	    var itemsLength, index;
+
+	    for (index = 0; index < arrayLength; index++) {
+	      if (index in array) push$3(items, array[index]);
+	    }
+
+	    internalSort(items, getSortCompare(comparefn));
+
+	    itemsLength = items.length;
+	    index = 0;
+
+	    while (index < itemsLength) array[index] = items[index++];
+	    while (index < arrayLength) delete array[index++];
+
+	    return array;
+	  }
+	});
 
 	var e10 = Math.sqrt(50),
 	    e5 = Math.sqrt(10),
 	    e2 = Math.sqrt(2);
-
-	function ticks(start, stop, count) {
+	function ticks (start, stop, count) {
 	  var reverse,
 	      i = -1,
 	      n,
 	      ticks,
 	      step;
-
 	  stop = +stop, start = +start, count = +count;
-	  if (start === stop && count > 0) { return [start]; }
-	  if (reverse = stop < start) { n = start, start = stop, stop = n; }
-	  if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) { return []; }
+	  if (start === stop && count > 0) return [start];
+	  if (reverse = stop < start) n = start, start = stop, stop = n;
+	  if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) return [];
 
 	  if (step > 0) {
-	    start = Math.ceil(start / step);
-	    stop = Math.floor(stop / step);
-	    ticks = new Array(n = Math.ceil(stop - start + 1));
-	    while (++i < n) { ticks[i] = (start + i) * step; }
+	    var r0 = Math.round(start / step),
+	        r1 = Math.round(stop / step);
+	    if (r0 * step < start) ++r0;
+	    if (r1 * step > stop) --r1;
+	    ticks = new Array(n = r1 - r0 + 1);
+
+	    while (++i < n) {
+	      ticks[i] = (r0 + i) * step;
+	    }
 	  } else {
-	    start = Math.floor(start * step);
-	    stop = Math.ceil(stop * step);
-	    ticks = new Array(n = Math.ceil(start - stop + 1));
-	    while (++i < n) { ticks[i] = (start - i) / step; }
-	  }
+	    step = -step;
+
+	    var _r = Math.round(start * step),
+	        _r2 = Math.round(stop * step);
 
-	  if (reverse) { ticks.reverse(); }
+	    if (_r / step < start) ++_r;
+	    if (_r2 / step > stop) --_r2;
+	    ticks = new Array(n = _r2 - _r + 1);
 
+	    while (++i < n) {
+	      ticks[i] = (_r + i) / step;
+	    }
+	  }
+
+	  if (reverse) ticks.reverse();
 	  return ticks;
 	}
-
 	function tickIncrement(start, stop, count) {
 	  var step = (stop - start) / Math.max(0, count),
 	      power = Math.floor(Math.log(step) / Math.LN10),
 	      error = step / Math.pow(10, power);
-	  return power >= 0
-	      ? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power)
-	      : -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);
+	  return power >= 0 ? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power) : -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);
 	}
-
 	function tickStep(start, stop, count) {
 	  var step0 = Math.abs(stop - start) / Math.max(0, count),
 	      step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
 	      error = step0 / step1;
-	  if (error >= e10) { step1 *= 10; }
-	  else if (error >= e5) { step1 *= 5; }
-	  else if (error >= e2) { step1 *= 2; }
+	  if (error >= e10) step1 *= 10;else if (error >= e5) step1 *= 5;else if (error >= e2) step1 *= 2;
 	  return stop < start ? -step1 : step1;
 	}
 
-	function threshold(values, p, valueof) {
-	  if (valueof == null) { valueof = number; }
-	  if (!(n = values.length)) { return; }
-	  if ((p = +p) <= 0 || n < 2) { return +valueof(values[0], 0, values); }
-	  if (p >= 1) { return +valueof(values[n - 1], n - 1, values); }
-	  var n,
-	      i = (n - 1) * p,
-	      i0 = Math.floor(i),
-	      value0 = +valueof(values[i0], i0, values),
-	      value1 = +valueof(values[i0 + 1], i0 + 1, values);
-	  return value0 + (value1 - value0) * (i - i0);
-	}
+	function max(values, valueof) {
+	  var max;
 
-	function d3_median(values, valueof) {
-	  var n = values.length,
-	      i = -1,
-	      value,
-	      numbers = [];
+	  if (valueof === undefined) {
+	    var _iterator = _createForOfIteratorHelper(values),
+	        _step;
 
-	  if (valueof == null) {
-	    while (++i < n) {
-	      if (!isNaN(value = number(values[i]))) {
-	        numbers.push(value);
+	    try {
+	      for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	        var value = _step.value;
+
+	        if (value != null && (max < value || max === undefined && value >= value)) {
+	          max = value;
+	        }
 	      }
+	    } catch (err) {
+	      _iterator.e(err);
+	    } finally {
+	      _iterator.f();
 	    }
-	  }
+	  } else {
+	    var index = -1;
 
-	  else {
-	    while (++i < n) {
-	      if (!isNaN(value = number(valueof(values[i], i, values)))) {
-	        numbers.push(value);
+	    var _iterator2 = _createForOfIteratorHelper(values),
+	        _step2;
+
+	    try {
+	      for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+	        var _value = _step2.value;
+
+	        if ((_value = valueof(_value, ++index, values)) != null && (max < _value || max === undefined && _value >= _value)) {
+	          max = _value;
+	        }
 	      }
+	    } catch (err) {
+	      _iterator2.e(err);
+	    } finally {
+	      _iterator2.f();
 	    }
 	  }
 
-	  return threshold(numbers.sort(d3_ascending), 0.5);
+	  return max;
 	}
 
-	function merge(arrays) {
-	  var n = arrays.length,
-	      m,
-	      i = -1,
-	      j = 0,
-	      merged,
-	      array;
+	function min$2(values, valueof) {
+	  var min;
+
+	  if (valueof === undefined) {
+	    var _iterator = _createForOfIteratorHelper(values),
+	        _step;
 
-	  while (++i < n) { j += arrays[i].length; }
-	  merged = new Array(j);
+	    try {
+	      for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	        var value = _step.value;
 
-	  while (--n >= 0) {
-	    array = arrays[n];
-	    m = array.length;
-	    while (--m >= 0) {
-	      merged[--j] = array[m];
+	        if (value != null && (min > value || min === undefined && value >= value)) {
+	          min = value;
+	        }
+	      }
+	    } catch (err) {
+	      _iterator.e(err);
+	    } finally {
+	      _iterator.f();
 	    }
-	  }
+	  } else {
+	    var index = -1;
 
-	  return merged;
-	}
+	    var _iterator2 = _createForOfIteratorHelper(values),
+	        _step2;
 
-	function clip(pointVisible, clipLine, interpolate, start) {
-	  return function(sink) {
-	    var line = clipLine(sink),
-	        ringBuffer = clipBuffer(),
-	        ringSink = clipLine(ringBuffer),
-	        polygonStarted = false,
-	        polygon,
-	        segments,
-	        ring;
+	    try {
+	      for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+	        var _value = _step2.value;
 
-	    var clip = {
-	      point: point,
-	      lineStart: lineStart,
-	      lineEnd: lineEnd,
-	      polygonStart: function() {
-	        clip.point = pointRing;
-	        clip.lineStart = ringStart;
-	        clip.lineEnd = ringEnd;
-	        segments = [];
-	        polygon = [];
-	      },
-	      polygonEnd: function() {
-	        clip.point = point;
-	        clip.lineStart = lineStart;
-	        clip.lineEnd = lineEnd;
-	        segments = merge(segments);
-	        var startInside = polygonContains(polygon, start);
-	        if (segments.length) {
-	          if (!polygonStarted) { sink.polygonStart(), polygonStarted = true; }
-	          clipRejoin(segments, compareIntersection, startInside, interpolate, sink);
-	        } else if (startInside) {
-	          if (!polygonStarted) { sink.polygonStart(), polygonStarted = true; }
-	          sink.lineStart();
-	          interpolate(null, null, 1, sink);
-	          sink.lineEnd();
+	        if ((_value = valueof(_value, ++index, values)) != null && (min > _value || min === undefined && _value >= _value)) {
+	          min = _value;
 	        }
-	        if (polygonStarted) { sink.polygonEnd(), polygonStarted = false; }
-	        segments = polygon = null;
-	      },
-	      sphere: function() {
-	        sink.polygonStart();
-	        sink.lineStart();
-	        interpolate(null, null, 1, sink);
-	        sink.lineEnd();
-	        sink.polygonEnd();
 	      }
-	    };
-
-	    function point(lambda, phi) {
-	      if (pointVisible(lambda, phi)) { sink.point(lambda, phi); }
-	    }
-
-	    function pointLine(lambda, phi) {
-	      line.point(lambda, phi);
+	    } catch (err) {
+	      _iterator2.e(err);
+	    } finally {
+	      _iterator2.f();
 	    }
+	  }
 
-	    function lineStart() {
-	      clip.point = pointLine;
-	      line.lineStart();
-	    }
+	  return min;
+	}
 
-	    function lineEnd() {
-	      clip.point = point;
-	      line.lineEnd();
-	    }
+	// ISC license, Copyright 2018 Vladimir Agafonkin.
 
-	    function pointRing(lambda, phi) {
-	      ring.push([lambda, phi]);
-	      ringSink.point(lambda, phi);
-	    }
+	function quickselect$3(array, k) {
+	  var left = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;
+	  var right = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : array.length - 1;
+	  var compare = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : d3_ascending;
 
-	    function ringStart() {
-	      ringSink.lineStart();
-	      ring = [];
+	  while (right > left) {
+	    if (right - left > 600) {
+	      var n = right - left + 1;
+	      var m = k - left + 1;
+	      var z = Math.log(n);
+	      var s = 0.5 * Math.exp(2 * z / 3);
+	      var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
+	      var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
+	      var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
+	      quickselect$3(array, k, newLeft, newRight, compare);
 	    }
 
-	    function ringEnd() {
-	      pointRing(ring[0][0], ring[0][1]);
-	      ringSink.lineEnd();
-
-	      var clean = ringSink.clean(),
-	          ringSegments = ringBuffer.result(),
-	          i, n = ringSegments.length, m,
-	          segment,
-	          point;
+	    var t = array[k];
+	    var i = left;
+	    var j = right;
+	    swap$1(array, left, k);
+	    if (compare(array[right], t) > 0) swap$1(array, left, right);
 
-	      ring.pop();
-	      polygon.push(ring);
-	      ring = null;
+	    while (i < j) {
+	      swap$1(array, i, j), ++i, --j;
 
-	      if (!n) { return; }
+	      while (compare(array[i], t) < 0) {
+	        ++i;
+	      }
 
-	      // No intersections.
-	      if (clean & 1) {
-	        segment = ringSegments[0];
-	        if ((m = segment.length - 1) > 0) {
-	          if (!polygonStarted) { sink.polygonStart(), polygonStarted = true; }
-	          sink.lineStart();
-	          for (i = 0; i < m; ++i) { sink.point((point = segment[i])[0], point[1]); }
-	          sink.lineEnd();
-	        }
-	        return;
+	      while (compare(array[j], t) > 0) {
+	        --j;
 	      }
+	    }
 
-	      // Rejoin connected segments.
-	      // TODO reuse ringBuffer.rejoin()?
-	      if (n > 1 && clean & 2) { ringSegments.push(ringSegments.pop().concat(ringSegments.shift())); }
+	    if (compare(array[left], t) === 0) swap$1(array, left, j);else ++j, swap$1(array, j, right);
+	    if (j <= k) left = j + 1;
+	    if (k <= j) right = j - 1;
+	  }
 
-	      segments.push(ringSegments.filter(validSegment));
-	    }
+	  return array;
+	}
 
-	    return clip;
-	  };
+	function swap$1(array, i, j) {
+	  var t = array[i];
+	  array[i] = array[j];
+	  array[j] = t;
 	}
 
-	function validSegment(segment) {
-	  return segment.length > 1;
+	function quantile(values, p, valueof) {
+	  values = Float64Array.from(numbers(values, valueof));
+	  if (!(n = values.length)) return;
+	  if ((p = +p) <= 0 || n < 2) return min$2(values);
+	  if (p >= 1) return max(values);
+	  var n,
+	      i = (n - 1) * p,
+	      i0 = Math.floor(i),
+	      value0 = max(quickselect$3(values, i0).subarray(0, i0 + 1)),
+	      value1 = min$2(values.subarray(i0 + 1));
+	  return value0 + (value1 - value0) * (i - i0);
 	}
 
-	// Intersections are sorted along the clip edge. For both antimeridian cutting
-	// and circle clipping, the same comparison is used.
-	function compareIntersection(a, b) {
-	  return ((a = a.x)[0] < 0 ? a[1] - halfPi - epsilon : halfPi - a[1])
-	       - ((b = b.x)[0] < 0 ? b[1] - halfPi - epsilon : halfPi - b[1]);
+	function d3_median (values, valueof) {
+	  return quantile(values, 0.5, valueof);
 	}
 
-	var clipAntimeridian = clip(
-	  function() { return true; },
-	  clipAntimeridianLine,
-	  clipAntimeridianInterpolate,
-	  [-pi, -halfPi]
-	);
+	var _marked$2 = /*#__PURE__*/regeneratorRuntime.mark(flatten);
 
-	// Takes a line and cuts into visible segments. Return values: 0 - there were
-	// intersections or the line was empty; 1 - no intersections; 2 - there were
-	// intersections, and the first and last segments should be rejoined.
-	function clipAntimeridianLine(stream) {
-	  var lambda0 = NaN,
-	      phi0 = NaN,
-	      sign0 = NaN,
-	      clean; // no intersections
+	function flatten(arrays) {
+	  var _iterator, _step, array;
 
-	  return {
-	    lineStart: function() {
-	      stream.lineStart();
-	      clean = 1;
-	    },
-	    point: function(lambda1, phi1) {
-	      var sign1 = lambda1 > 0 ? pi : -pi,
-	          delta = abs$2(lambda1 - lambda0);
-	      if (abs$2(delta - pi) < epsilon) { // line crosses a pole
-	        stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi : -halfPi);
-	        stream.point(sign0, phi0);
-	        stream.lineEnd();
-	        stream.lineStart();
-	        stream.point(sign1, phi0);
-	        stream.point(lambda1, phi0);
-	        clean = 0;
-	      } else if (sign0 !== sign1 && delta >= pi) { // line crosses antimeridian
-	        if (abs$2(lambda0 - sign0) < epsilon) { lambda0 -= sign0 * epsilon; } // handle degeneracies
-	        if (abs$2(lambda1 - sign1) < epsilon) { lambda1 -= sign1 * epsilon; }
-	        phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
-	        stream.point(sign0, phi0);
-	        stream.lineEnd();
-	        stream.lineStart();
-	        stream.point(sign1, phi0);
-	        clean = 0;
-	      }
-	      stream.point(lambda0 = lambda1, phi0 = phi1);
-	      sign0 = sign1;
-	    },
-	    lineEnd: function() {
-	      stream.lineEnd();
-	      lambda0 = phi0 = NaN;
-	    },
-	    clean: function() {
-	      return 2 - clean; // if intersections, rejoin first and last segments
-	    }
-	  };
-	}
+	  return regeneratorRuntime.wrap(function flatten$(_context) {
+	    while (1) {
+	      switch (_context.prev = _context.next) {
+	        case 0:
+	          _iterator = _createForOfIteratorHelper(arrays);
+	          _context.prev = 1;
 
-	function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
-	  var cosPhi0,
-	      cosPhi1,
-	      sinLambda0Lambda1 = sin(lambda0 - lambda1);
-	  return abs$2(sinLambda0Lambda1) > epsilon
-	      ? atan((sin(phi0) * (cosPhi1 = cos(phi1)) * sin(lambda1)
-	          - sin(phi1) * (cosPhi0 = cos(phi0)) * sin(lambda0))
-	          / (cosPhi0 * cosPhi1 * sinLambda0Lambda1))
-	      : (phi0 + phi1) / 2;
-	}
+	          _iterator.s();
 
-	function clipAntimeridianInterpolate(from, to, direction, stream) {
-	  var phi;
-	  if (from == null) {
-	    phi = direction * halfPi;
-	    stream.point(-pi, phi);
-	    stream.point(0, phi);
-	    stream.point(pi, phi);
-	    stream.point(pi, 0);
-	    stream.point(pi, -phi);
-	    stream.point(0, -phi);
-	    stream.point(-pi, -phi);
-	    stream.point(-pi, 0);
-	    stream.point(-pi, phi);
-	  } else if (abs$2(from[0] - to[0]) > epsilon) {
-	    var lambda = from[0] < to[0] ? pi : -pi;
-	    phi = direction * lambda / 2;
-	    stream.point(-lambda, phi);
-	    stream.point(0, phi);
-	    stream.point(lambda, phi);
-	  } else {
-	    stream.point(to[0], to[1]);
-	  }
-	}
-
-	function clipCircle(radius) {
-	  var cr = cos(radius),
-	      delta = 6 * radians,
-	      smallRadius = cr > 0,
-	      notHemisphere = abs$2(cr) > epsilon; // TODO optimise for this common case
-
-	  function interpolate(from, to, direction, stream) {
-	    circleStream(stream, radius, delta, direction, from, to);
-	  }
-
-	  function visible(lambda, phi) {
-	    return cos(lambda) * cos(phi) > cr;
-	  }
-
-	  // Takes a line and cuts into visible segments. Return values used for polygon
-	  // clipping: 0 - there were intersections or the line was empty; 1 - no
-	  // intersections 2 - there were intersections, and the first and last segments
-	  // should be rejoined.
-	  function clipLine(stream) {
-	    var point0, // previous point
-	        c0, // code for previous point
-	        v0, // visibility of previous point
-	        v00, // visibility of first point
-	        clean; // no intersections
-	    return {
-	      lineStart: function() {
-	        v00 = v0 = false;
-	        clean = 1;
-	      },
-	      point: function(lambda, phi) {
-	        var point1 = [lambda, phi],
-	            point2,
-	            v = visible(lambda, phi),
-	            c = smallRadius
-	              ? v ? 0 : code(lambda, phi)
-	              : v ? code(lambda + (lambda < 0 ? pi : -pi), phi) : 0;
-	        if (!point0 && (v00 = v0 = v)) { stream.lineStart(); }
-	        if (v !== v0) {
-	          point2 = intersect(point0, point1);
-	          if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2))
-	            { point1[2] = 1; }
-	        }
-	        if (v !== v0) {
-	          clean = 0;
-	          if (v) {
-	            // outside going in
-	            stream.lineStart();
-	            point2 = intersect(point1, point0);
-	            stream.point(point2[0], point2[1]);
-	          } else {
-	            // inside going out
-	            point2 = intersect(point0, point1);
-	            stream.point(point2[0], point2[1], 2);
-	            stream.lineEnd();
-	          }
-	          point0 = point2;
-	        } else if (notHemisphere && point0 && smallRadius ^ v) {
-	          var t;
-	          // If the codes for two points are different, or are both zero,
-	          // and there this segment intersects with the small circle.
-	          if (!(c & c0) && (t = intersect(point1, point0, true))) {
-	            clean = 0;
-	            if (smallRadius) {
-	              stream.lineStart();
-	              stream.point(t[0][0], t[0][1]);
-	              stream.point(t[1][0], t[1][1]);
-	              stream.lineEnd();
-	            } else {
-	              stream.point(t[1][0], t[1][1]);
-	              stream.lineEnd();
-	              stream.lineStart();
-	              stream.point(t[0][0], t[0][1], 3);
-	            }
+	        case 3:
+	          if ((_step = _iterator.n()).done) {
+	            _context.next = 8;
+	            break;
 	          }
-	        }
-	        if (v && (!point0 || !pointEqual(point0, point1))) {
-	          stream.point(point1[0], point1[1]);
-	        }
-	        point0 = point1, v0 = v, c0 = c;
-	      },
-	      lineEnd: function() {
-	        if (v0) { stream.lineEnd(); }
-	        point0 = null;
-	      },
-	      // Rejoin first and last segments if there were intersections and the first
-	      // and last points were visible.
-	      clean: function() {
-	        return clean | ((v00 && v0) << 1);
-	      }
-	    };
-	  }
-
-	  // Intersects the great circle between a and b with the clip circle.
-	  function intersect(a, b, two) {
-	    var pa = cartesian(a),
-	        pb = cartesian(b);
-
-	    // We have two planes, n1.p = d1 and n2.p = d2.
-	    // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
-	    var n1 = [1, 0, 0], // normal
-	        n2 = cartesianCross(pa, pb),
-	        n2n2 = cartesianDot(n2, n2),
-	        n1n2 = n2[0], // cartesianDot(n1, n2),
-	        determinant = n2n2 - n1n2 * n1n2;
-
-	    // Two polar points.
-	    if (!determinant) { return !two && a; }
 
-	    var c1 =  cr * n2n2 / determinant,
-	        c2 = -cr * n1n2 / determinant,
-	        n1xn2 = cartesianCross(n1, n2),
-	        A = cartesianScale(n1, c1),
-	        B = cartesianScale(n2, c2);
-	    cartesianAddInPlace(A, B);
-
-	    // Solve |p(t)|^2 = 1.
-	    var u = n1xn2,
-	        w = cartesianDot(A, u),
-	        uu = cartesianDot(u, u),
-	        t2 = w * w - uu * (cartesianDot(A, A) - 1);
+	          array = _step.value;
+	          return _context.delegateYield(array, "t0", 6);
 
-	    if (t2 < 0) { return; }
+	        case 6:
+	          _context.next = 3;
+	          break;
 
-	    var t = sqrt(t2),
-	        q = cartesianScale(u, (-w - t) / uu);
-	    cartesianAddInPlace(q, A);
-	    q = spherical(q);
+	        case 8:
+	          _context.next = 13;
+	          break;
 
-	    if (!two) { return q; }
+	        case 10:
+	          _context.prev = 10;
+	          _context.t1 = _context["catch"](1);
 
-	    // Two intersection points.
-	    var lambda0 = a[0],
-	        lambda1 = b[0],
-	        phi0 = a[1],
-	        phi1 = b[1],
-	        z;
+	          _iterator.e(_context.t1);
 
-	    if (lambda1 < lambda0) { z = lambda0, lambda0 = lambda1, lambda1 = z; }
+	        case 13:
+	          _context.prev = 13;
 
-	    var delta = lambda1 - lambda0,
-	        polar = abs$2(delta - pi) < epsilon,
-	        meridian = polar || delta < epsilon;
+	          _iterator.f();
 
-	    if (!polar && phi1 < phi0) { z = phi0, phi0 = phi1, phi1 = z; }
+	          return _context.finish(13);
 
-	    // Check that the first point is between a and b.
-	    if (meridian
-	        ? polar
-	          ? phi0 + phi1 > 0 ^ q[1] < (abs$2(q[0] - lambda0) < epsilon ? phi0 : phi1)
-	          : phi0 <= q[1] && q[1] <= phi1
-	        : delta > pi ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
-	      var q1 = cartesianScale(u, (-w + t) / uu);
-	      cartesianAddInPlace(q1, A);
-	      return [q, spherical(q1)];
+	        case 16:
+	        case "end":
+	          return _context.stop();
+	      }
 	    }
-	  }
-
-	  // Generates a 4-bit vector representing the location of a point relative to
-	  // the small circle's bounding box.
-	  function code(lambda, phi) {
-	    var r = smallRadius ? radius : pi - radius,
-	        code = 0;
-	    if (lambda < -r) { code |= 1; } // left
-	    else if (lambda > r) { code |= 2; } // right
-	    if (phi < -r) { code |= 4; } // below
-	    else if (phi > r) { code |= 8; } // above
-	    return code;
-	  }
-
-	  return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi, radius - pi]);
+	  }, _marked$2, null, [[1, 10, 13, 16]]);
 	}
 
-	function clipLine(a, b, x0, y0, x1, y1) {
-	  var ax = a[0],
-	      ay = a[1],
-	      bx = b[0],
-	      by = b[1],
-	      t0 = 0,
-	      t1 = 1,
-	      dx = bx - ax,
-	      dy = by - ay,
-	      r;
-
-	  r = x0 - ax;
-	  if (!dx && r > 0) { return; }
-	  r /= dx;
-	  if (dx < 0) {
-	    if (r < t0) { return; }
-	    if (r < t1) { t1 = r; }
-	  } else if (dx > 0) {
-	    if (r > t1) { return; }
-	    if (r > t0) { t0 = r; }
-	  }
-
-	  r = x1 - ax;
-	  if (!dx && r < 0) { return; }
-	  r /= dx;
-	  if (dx < 0) {
-	    if (r > t1) { return; }
-	    if (r > t0) { t0 = r; }
-	  } else if (dx > 0) {
-	    if (r < t0) { return; }
-	    if (r < t1) { t1 = r; }
-	  }
+	function merge$4(arrays) {
+	  return Array.from(flatten(arrays));
+	}
 
-	  r = y0 - ay;
-	  if (!dy && r > 0) { return; }
-	  r /= dy;
-	  if (dy < 0) {
-	    if (r < t0) { return; }
-	    if (r < t1) { t1 = r; }
-	  } else if (dy > 0) {
-	    if (r > t1) { return; }
-	    if (r > t0) { t0 = r; }
-	  }
+	function range$1 (start, stop, step) {
+	  start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;
+	  var i = -1,
+	      n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
+	      range = new Array(n);
 
-	  r = y1 - ay;
-	  if (!dy && r < 0) { return; }
-	  r /= dy;
-	  if (dy < 0) {
-	    if (r > t1) { return; }
-	    if (r > t0) { t0 = r; }
-	  } else if (dy > 0) {
-	    if (r < t0) { return; }
-	    if (r < t1) { t1 = r; }
+	  while (++i < n) {
+	    range[i] = start + i * step;
 	  }
 
-	  if (t0 > 0) { a[0] = ax + t0 * dx, a[1] = ay + t0 * dy; }
-	  if (t1 < 1) { b[0] = ax + t1 * dx, b[1] = ay + t1 * dy; }
-	  return true;
+	  return range;
 	}
 
-	var clipMax = 1e9, clipMin = -clipMax;
-
-	// TODO Use d3-polygon’s polygonContains here for the ring check?
-	// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?
-
-	function clipRectangle(x0, y0, x1, y1) {
+	// `SameValue` abstract operation
+	// https://tc39.es/ecma262/#sec-samevalue
+	// eslint-disable-next-line es/no-object-is -- safe
+	var sameValue$1 = Object.is || function is(x, y) {
+	  // eslint-disable-next-line no-self-compare -- NaN check
+	  return x === y ? x !== 0 || 1 / x === 1 / y : x != x && y != y;
+	};
 
-	  function visible(x, y) {
-	    return x0 <= x && x <= x1 && y0 <= y && y <= y1;
-	  }
+	var $$y = _export;
 
-	  function interpolate(from, to, direction, stream) {
-	    var a = 0, a1 = 0;
-	    if (from == null
-	        || (a = corner(from, direction)) !== (a1 = corner(to, direction))
-	        || comparePoint(from, to) < 0 ^ direction > 0) {
-	      do { stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0); }
-	      while ((a = (a + direction + 4) % 4) !== a1);
-	    } else {
-	      stream.point(to[0], to[1]);
-	    }
-	  }
+	// eslint-disable-next-line es/no-math-hypot -- required for testing
+	var $hypot = Math.hypot;
+	var abs$3 = Math.abs;
+	var sqrt$1 = Math.sqrt;
 
-	  function corner(p, direction) {
-	    return abs$2(p[0] - x0) < epsilon ? direction > 0 ? 0 : 3
-	        : abs$2(p[0] - x1) < epsilon ? direction > 0 ? 2 : 1
-	        : abs$2(p[1] - y0) < epsilon ? direction > 0 ? 1 : 0
-	        : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
-	  }
+	// Chrome 77 bug
+	// https://bugs.chromium.org/p/v8/issues/detail?id=9546
+	var BUGGY = !!$hypot && $hypot(Infinity, NaN) !== Infinity;
 
-	  function compareIntersection(a, b) {
-	    return comparePoint(a.x, b.x);
+	// `Math.hypot` method
+	// https://tc39.es/ecma262/#sec-math.hypot
+	$$y({ target: 'Math', stat: true, forced: BUGGY }, {
+	  // eslint-disable-next-line no-unused-vars -- required for `.length`
+	  hypot: function hypot(value1, value2) {
+	    var sum = 0;
+	    var i = 0;
+	    var aLen = arguments.length;
+	    var larg = 0;
+	    var arg, div;
+	    while (i < aLen) {
+	      arg = abs$3(arguments[i++]);
+	      if (larg < arg) {
+	        div = larg / arg;
+	        sum = sum * div * div + 1;
+	        larg = arg;
+	      } else if (arg > 0) {
+	        div = arg / larg;
+	        sum += div * div;
+	      } else sum += arg;
+	    }
+	    return larg === Infinity ? Infinity : larg * sqrt$1(sum);
 	  }
+	});
 
-	  function comparePoint(a, b) {
-	    var ca = corner(a, 1),
-	        cb = corner(b, 1);
-	    return ca !== cb ? ca - cb
-	        : ca === 0 ? b[1] - a[1]
-	        : ca === 1 ? a[0] - b[0]
-	        : ca === 2 ? a[1] - b[1]
-	        : b[0] - a[0];
-	  }
+	// `Math.sign` method implementation
+	// https://tc39.es/ecma262/#sec-math.sign
+	// eslint-disable-next-line es/no-math-sign -- safe
+	var mathSign = Math.sign || function sign(x) {
+	  // eslint-disable-next-line no-self-compare -- NaN check
+	  return (x = +x) == 0 || x != x ? x : x < 0 ? -1 : 1;
+	};
 
-	  return function(stream) {
-	    var activeStream = stream,
-	        bufferStream = clipBuffer(),
-	        segments,
-	        polygon,
-	        ring,
-	        x__, y__, v__, // first point
-	        x_, y_, v_, // previous point
-	        first,
-	        clean;
+	var $$x = _export;
+	var sign$1 = mathSign;
 
-	    var clipStream = {
-	      point: point,
-	      lineStart: lineStart,
-	      lineEnd: lineEnd,
-	      polygonStart: polygonStart,
-	      polygonEnd: polygonEnd
-	    };
+	// `Math.sign` method
+	// https://tc39.es/ecma262/#sec-math.sign
+	$$x({ target: 'Math', stat: true }, {
+	  sign: sign$1
+	});
 
-	    function point(x, y) {
-	      if (visible(x, y)) { activeStream.point(x, y); }
-	    }
+	var epsilon$1 = 1e-6;
+	var epsilon2$1 = 1e-12;
+	var pi = Math.PI;
+	var halfPi = pi / 2;
+	var quarterPi = pi / 4;
+	var tau = pi * 2;
+	var degrees$1 = 180 / pi;
+	var radians = pi / 180;
+	var abs$2 = Math.abs;
+	var atan = Math.atan;
+	var atan2 = Math.atan2;
+	var cos = Math.cos;
+	var exp$2 = Math.exp;
+	var log$1 = Math.log;
+	var sin = Math.sin;
+	var sign = Math.sign || function (x) {
+	  return x > 0 ? 1 : x < 0 ? -1 : 0;
+	};
+	var sqrt = Math.sqrt;
+	var tan = Math.tan;
+	function acos(x) {
+	  return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
+	}
+	function asin(x) {
+	  return x > 1 ? halfPi : x < -1 ? -halfPi : Math.asin(x);
+	}
 
-	    function polygonInside() {
-	      var winding = 0;
+	function noop$1() {}
 
-	      for (var i = 0, n = polygon.length; i < n; ++i) {
-	        for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
-	          a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
-	          if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) { ++winding; } }
-	          else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) { --winding; } }
-	        }
-	      }
+	function streamGeometry(geometry, stream) {
+	  if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
+	    streamGeometryType[geometry.type](geometry, stream);
+	  }
+	}
 
-	      return winding;
-	    }
+	var streamObjectType = {
+	  Feature: function Feature(object, stream) {
+	    streamGeometry(object.geometry, stream);
+	  },
+	  FeatureCollection: function FeatureCollection(object, stream) {
+	    var features = object.features,
+	        i = -1,
+	        n = features.length;
 
-	    // Buffer geometry within a polygon and then clip it en masse.
-	    function polygonStart() {
-	      activeStream = bufferStream, segments = [], polygon = [], clean = true;
+	    while (++i < n) {
+	      streamGeometry(features[i].geometry, stream);
 	    }
+	  }
+	};
+	var streamGeometryType = {
+	  Sphere: function Sphere(object, stream) {
+	    stream.sphere();
+	  },
+	  Point: function Point(object, stream) {
+	    object = object.coordinates;
+	    stream.point(object[0], object[1], object[2]);
+	  },
+	  MultiPoint: function MultiPoint(object, stream) {
+	    var coordinates = object.coordinates,
+	        i = -1,
+	        n = coordinates.length;
 
-	    function polygonEnd() {
-	      var startInside = polygonInside(),
-	          cleanInside = clean && startInside,
-	          visible = (segments = merge(segments)).length;
-	      if (cleanInside || visible) {
-	        stream.polygonStart();
-	        if (cleanInside) {
-	          stream.lineStart();
-	          interpolate(null, null, 1, stream);
-	          stream.lineEnd();
-	        }
-	        if (visible) {
-	          clipRejoin(segments, compareIntersection, startInside, interpolate, stream);
-	        }
-	        stream.polygonEnd();
-	      }
-	      activeStream = stream, segments = polygon = ring = null;
+	    while (++i < n) {
+	      object = coordinates[i], stream.point(object[0], object[1], object[2]);
 	    }
+	  },
+	  LineString: function LineString(object, stream) {
+	    streamLine(object.coordinates, stream, 0);
+	  },
+	  MultiLineString: function MultiLineString(object, stream) {
+	    var coordinates = object.coordinates,
+	        i = -1,
+	        n = coordinates.length;
 
-	    function lineStart() {
-	      clipStream.point = linePoint;
-	      if (polygon) { polygon.push(ring = []); }
-	      first = true;
-	      v_ = false;
-	      x_ = y_ = NaN;
+	    while (++i < n) {
+	      streamLine(coordinates[i], stream, 0);
 	    }
+	  },
+	  Polygon: function Polygon(object, stream) {
+	    streamPolygon(object.coordinates, stream);
+	  },
+	  MultiPolygon: function MultiPolygon(object, stream) {
+	    var coordinates = object.coordinates,
+	        i = -1,
+	        n = coordinates.length;
 
-	    // TODO rather than special-case polygons, simply handle them separately.
-	    // Ideally, coincident intersection points should be jittered to avoid
-	    // clipping issues.
-	    function lineEnd() {
-	      if (segments) {
-	        linePoint(x__, y__);
-	        if (v__ && v_) { bufferStream.rejoin(); }
-	        segments.push(bufferStream.result());
-	      }
-	      clipStream.point = point;
-	      if (v_) { activeStream.lineEnd(); }
+	    while (++i < n) {
+	      streamPolygon(coordinates[i], stream);
 	    }
+	  },
+	  GeometryCollection: function GeometryCollection(object, stream) {
+	    var geometries = object.geometries,
+	        i = -1,
+	        n = geometries.length;
 
-	    function linePoint(x, y) {
-	      var v = visible(x, y);
-	      if (polygon) { ring.push([x, y]); }
-	      if (first) {
-	        x__ = x, y__ = y, v__ = v;
-	        first = false;
-	        if (v) {
-	          activeStream.lineStart();
-	          activeStream.point(x, y);
-	        }
-	      } else {
-	        if (v && v_) { activeStream.point(x, y); }
-	        else {
-	          var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
-	              b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];
-	          if (clipLine(a, b, x0, y0, x1, y1)) {
-	            if (!v_) {
-	              activeStream.lineStart();
-	              activeStream.point(a[0], a[1]);
-	            }
-	            activeStream.point(b[0], b[1]);
-	            if (!v) { activeStream.lineEnd(); }
-	            clean = false;
-	          } else if (v) {
-	            activeStream.lineStart();
-	            activeStream.point(x, y);
-	            clean = false;
-	          }
-	        }
-	      }
-	      x_ = x, y_ = y, v_ = v;
+	    while (++i < n) {
+	      streamGeometry(geometries[i], stream);
 	    }
-
-	    return clipStream;
-	  };
-	}
-
-	var lengthSum = adder(),
-	    lambda0$2,
-	    sinPhi0$1,
-	    cosPhi0$1;
-
-	var lengthStream = {
-	  sphere: noop$2,
-	  point: noop$2,
-	  lineStart: lengthLineStart,
-	  lineEnd: noop$2,
-	  polygonStart: noop$2,
-	  polygonEnd: noop$2
+	  }
 	};
 
-	function lengthLineStart() {
-	  lengthStream.point = lengthPointFirst;
-	  lengthStream.lineEnd = lengthLineEnd;
-	}
+	function streamLine(coordinates, stream, closed) {
+	  var i = -1,
+	      n = coordinates.length - closed,
+	      coordinate;
+	  stream.lineStart();
 
-	function lengthLineEnd() {
-	  lengthStream.point = lengthStream.lineEnd = noop$2;
-	}
+	  while (++i < n) {
+	    coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
+	  }
 
-	function lengthPointFirst(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  lambda0$2 = lambda, sinPhi0$1 = sin(phi), cosPhi0$1 = cos(phi);
-	  lengthStream.point = lengthPoint;
+	  stream.lineEnd();
 	}
 
-	function lengthPoint(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  var sinPhi = sin(phi),
-	      cosPhi = cos(phi),
-	      delta = abs$2(lambda - lambda0$2),
-	      cosDelta = cos(delta),
-	      sinDelta = sin(delta),
-	      x = cosPhi * sinDelta,
-	      y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,
-	      z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;
-	  lengthSum.add(atan2(sqrt(x * x + y * y), z));
-	  lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;
-	}
+	function streamPolygon(coordinates, stream) {
+	  var i = -1,
+	      n = coordinates.length;
+	  stream.polygonStart();
 
-	function d3_geoLength(object) {
-	  lengthSum.reset();
-	  d3_geoStream(object, lengthStream);
-	  return +lengthSum;
+	  while (++i < n) {
+	    streamLine(coordinates[i], stream, 1);
+	  }
+
+	  stream.polygonEnd();
 	}
 
-	function identity(x) {
-	  return x;
+	function d3_geoStream (object, stream) {
+	  if (object && streamObjectType.hasOwnProperty(object.type)) {
+	    streamObjectType[object.type](object, stream);
+	  } else {
+	    streamGeometry(object, stream);
+	  }
 	}
 
-	var areaSum$1 = adder(),
-	    areaRingSum$1 = adder(),
-	    x00,
-	    y00,
-	    x0$1,
-	    y0$1;
+	var areaRingSum$1 = new Adder(); // hello?
 
+	var areaSum$1 = new Adder(),
+	    lambda00$1,
+	    phi00$1,
+	    lambda0$2,
+	    cosPhi0$1,
+	    sinPhi0$1;
 	var areaStream$1 = {
-	  point: noop$2,
-	  lineStart: noop$2,
-	  lineEnd: noop$2,
-	  polygonStart: function() {
+	  point: noop$1,
+	  lineStart: noop$1,
+	  lineEnd: noop$1,
+	  polygonStart: function polygonStart() {
+	    areaRingSum$1 = new Adder();
 	    areaStream$1.lineStart = areaRingStart$1;
 	    areaStream$1.lineEnd = areaRingEnd$1;
 	  },
-	  polygonEnd: function() {
-	    areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$2;
-	    areaSum$1.add(abs$2(areaRingSum$1));
-	    areaRingSum$1.reset();
+	  polygonEnd: function polygonEnd() {
+	    var areaRing = +areaRingSum$1;
+	    areaSum$1.add(areaRing < 0 ? tau + areaRing : areaRing);
+	    this.lineStart = this.lineEnd = this.point = noop$1;
 	  },
-	  result: function() {
-	    var area = areaSum$1 / 2;
-	    areaSum$1.reset();
-	    return area;
+	  sphere: function sphere() {
+	    areaSum$1.add(tau);
 	  }
 	};
 
@@ -8136,52625 +10771,66375 @@
 	  areaStream$1.point = areaPointFirst$1;
 	}
 
-	function areaPointFirst$1(x, y) {
+	function areaRingEnd$1() {
+	  areaPoint$1(lambda00$1, phi00$1);
+	}
+
+	function areaPointFirst$1(lambda, phi) {
 	  areaStream$1.point = areaPoint$1;
-	  x00 = x0$1 = x, y00 = y0$1 = y;
+	  lambda00$1 = lambda, phi00$1 = phi;
+	  lambda *= radians, phi *= radians;
+	  lambda0$2 = lambda, cosPhi0$1 = cos(phi = phi / 2 + quarterPi), sinPhi0$1 = sin(phi);
 	}
 
-	function areaPoint$1(x, y) {
-	  areaRingSum$1.add(y0$1 * x - x0$1 * y);
-	  x0$1 = x, y0$1 = y;
+	function areaPoint$1(lambda, phi) {
+	  lambda *= radians, phi *= radians;
+	  phi = phi / 2 + quarterPi; // half the angular distance from south pole
+	  // Spherical excess E for a spherical triangle with vertices: south pole,
+	  // previous point, current point.  Uses a formula derived from Cagnoli’s
+	  // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
+
+	  var dLambda = lambda - lambda0$2,
+	      sdLambda = dLambda >= 0 ? 1 : -1,
+	      adLambda = sdLambda * dLambda,
+	      cosPhi = cos(phi),
+	      sinPhi = sin(phi),
+	      k = sinPhi0$1 * sinPhi,
+	      u = cosPhi0$1 * cosPhi + k * cos(adLambda),
+	      v = k * sdLambda * sin(adLambda);
+	  areaRingSum$1.add(atan2(v, u)); // Advance the previous points.
+
+	  lambda0$2 = lambda, cosPhi0$1 = cosPhi, sinPhi0$1 = sinPhi;
 	}
 
-	function areaRingEnd$1() {
-	  areaPoint$1(x00, y00);
+	function d3_geoArea (object) {
+	  areaSum$1 = new Adder();
+	  d3_geoStream(object, areaStream$1);
+	  return areaSum$1 * 2;
 	}
 
-	var x0$2 = Infinity,
-	    y0$2 = x0$2,
-	    x1 = -x0$2,
-	    y1 = x1;
+	function spherical(cartesian) {
+	  return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];
+	}
+	function cartesian(spherical) {
+	  var lambda = spherical[0],
+	      phi = spherical[1],
+	      cosPhi = cos(phi);
+	  return [cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi)];
+	}
+	function cartesianDot(a, b) {
+	  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
+	}
+	function cartesianCross(a, b) {
+	  return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
+	} // TODO return a
+
+	function cartesianAddInPlace(a, b) {
+	  a[0] += b[0], a[1] += b[1], a[2] += b[2];
+	}
+	function cartesianScale(vector, k) {
+	  return [vector[0] * k, vector[1] * k, vector[2] * k];
+	} // TODO return d
+
+	function cartesianNormalizeInPlace(d) {
+	  var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
+	  d[0] /= l, d[1] /= l, d[2] /= l;
+	}
 
+	var lambda0$1, phi0, lambda1, phi1, // bounds
+	lambda2, // previous lambda-coordinate
+	lambda00, phi00, // first point
+	p0, // previous 3D point
+	deltaSum, ranges, range;
 	var boundsStream$1 = {
 	  point: boundsPoint$1,
-	  lineStart: noop$2,
-	  lineEnd: noop$2,
-	  polygonStart: noop$2,
-	  polygonEnd: noop$2,
-	  result: function() {
-	    var bounds = [[x0$2, y0$2], [x1, y1]];
-	    x1 = y1 = -(y0$2 = x0$2 = Infinity);
-	    return bounds;
+	  lineStart: boundsLineStart,
+	  lineEnd: boundsLineEnd,
+	  polygonStart: function polygonStart() {
+	    boundsStream$1.point = boundsRingPoint;
+	    boundsStream$1.lineStart = boundsRingStart;
+	    boundsStream$1.lineEnd = boundsRingEnd;
+	    deltaSum = new Adder();
+	    areaStream$1.polygonStart();
+	  },
+	  polygonEnd: function polygonEnd() {
+	    areaStream$1.polygonEnd();
+	    boundsStream$1.point = boundsPoint$1;
+	    boundsStream$1.lineStart = boundsLineStart;
+	    boundsStream$1.lineEnd = boundsLineEnd;
+	    if (areaRingSum$1 < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);else if (deltaSum > epsilon$1) phi1 = 90;else if (deltaSum < -epsilon$1) phi0 = -90;
+	    range[0] = lambda0$1, range[1] = lambda1;
+	  },
+	  sphere: function sphere() {
+	    lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
 	  }
 	};
 
-	function boundsPoint$1(x, y) {
-	  if (x < x0$2) { x0$2 = x; }
-	  if (x > x1) { x1 = x; }
-	  if (y < y0$2) { y0$2 = y; }
-	  if (y > y1) { y1 = y; }
+	function boundsPoint$1(lambda, phi) {
+	  ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
+	  if (phi < phi0) phi0 = phi;
+	  if (phi > phi1) phi1 = phi;
 	}
 
-	// TODO Enforce positive area for exterior, negative area for interior?
+	function linePoint(lambda, phi) {
+	  var p = cartesian([lambda * radians, phi * radians]);
 
-	var X0$1 = 0,
-	    Y0$1 = 0,
-	    Z0$1 = 0,
-	    X1$1 = 0,
-	    Y1$1 = 0,
-	    Z1$1 = 0,
-	    X2$1 = 0,
-	    Y2$1 = 0,
-	    Z2$1 = 0,
-	    x00$1,
-	    y00$1,
-	    x0$3,
-	    y0$3;
+	  if (p0) {
+	    var normal = cartesianCross(p0, p),
+	        equatorial = [normal[1], -normal[0], 0],
+	        inflection = cartesianCross(equatorial, normal);
+	    cartesianNormalizeInPlace(inflection);
+	    inflection = spherical(inflection);
+	    var delta = lambda - lambda2,
+	        sign = delta > 0 ? 1 : -1,
+	        lambdai = inflection[0] * degrees$1 * sign,
+	        phii,
+	        antimeridian = abs$2(delta) > 180;
 
-	var centroidStream$1 = {
-	  point: centroidPoint$1,
-	  lineStart: centroidLineStart$1,
-	  lineEnd: centroidLineEnd$1,
-	  polygonStart: function() {
-	    centroidStream$1.lineStart = centroidRingStart$1;
-	    centroidStream$1.lineEnd = centroidRingEnd$1;
-	  },
-	  polygonEnd: function() {
-	    centroidStream$1.point = centroidPoint$1;
-	    centroidStream$1.lineStart = centroidLineStart$1;
-	    centroidStream$1.lineEnd = centroidLineEnd$1;
-	  },
-	  result: function() {
-	    var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1]
-	        : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1]
-	        : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1]
-	        : [NaN, NaN];
-	    X0$1 = Y0$1 = Z0$1 =
-	    X1$1 = Y1$1 = Z1$1 =
-	    X2$1 = Y2$1 = Z2$1 = 0;
-	    return centroid;
+	    if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
+	      phii = inflection[1] * degrees$1;
+	      if (phii > phi1) phi1 = phii;
+	    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
+	      phii = -inflection[1] * degrees$1;
+	      if (phii < phi0) phi0 = phii;
+	    } else {
+	      if (phi < phi0) phi0 = phi;
+	      if (phi > phi1) phi1 = phi;
+	    }
+
+	    if (antimeridian) {
+	      if (lambda < lambda2) {
+	        if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
+	      } else {
+	        if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
+	      }
+	    } else {
+	      if (lambda1 >= lambda0$1) {
+	        if (lambda < lambda0$1) lambda0$1 = lambda;
+	        if (lambda > lambda1) lambda1 = lambda;
+	      } else {
+	        if (lambda > lambda2) {
+	          if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
+	        } else {
+	          if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
+	        }
+	      }
+	    }
+	  } else {
+	    ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
 	  }
-	};
 
-	function centroidPoint$1(x, y) {
-	  X0$1 += x;
-	  Y0$1 += y;
-	  ++Z0$1;
+	  if (phi < phi0) phi0 = phi;
+	  if (phi > phi1) phi1 = phi;
+	  p0 = p, lambda2 = lambda;
 	}
 
-	function centroidLineStart$1() {
-	  centroidStream$1.point = centroidPointFirstLine;
+	function boundsLineStart() {
+	  boundsStream$1.point = linePoint;
 	}
 
-	function centroidPointFirstLine(x, y) {
-	  centroidStream$1.point = centroidPointLine;
-	  centroidPoint$1(x0$3 = x, y0$3 = y);
+	function boundsLineEnd() {
+	  range[0] = lambda0$1, range[1] = lambda1;
+	  boundsStream$1.point = boundsPoint$1;
+	  p0 = null;
 	}
 
-	function centroidPointLine(x, y) {
-	  var dx = x - x0$3, dy = y - y0$3, z = sqrt(dx * dx + dy * dy);
-	  X1$1 += z * (x0$3 + x) / 2;
-	  Y1$1 += z * (y0$3 + y) / 2;
-	  Z1$1 += z;
-	  centroidPoint$1(x0$3 = x, y0$3 = y);
+	function boundsRingPoint(lambda, phi) {
+	  if (p0) {
+	    var delta = lambda - lambda2;
+	    deltaSum.add(abs$2(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
+	  } else {
+	    lambda00 = lambda, phi00 = phi;
+	  }
+
+	  areaStream$1.point(lambda, phi);
+	  linePoint(lambda, phi);
 	}
 
-	function centroidLineEnd$1() {
-	  centroidStream$1.point = centroidPoint$1;
+	function boundsRingStart() {
+	  areaStream$1.lineStart();
 	}
 
-	function centroidRingStart$1() {
-	  centroidStream$1.point = centroidPointFirstRing;
+	function boundsRingEnd() {
+	  boundsRingPoint(lambda00, phi00);
+	  areaStream$1.lineEnd();
+	  if (abs$2(deltaSum) > epsilon$1) lambda0$1 = -(lambda1 = 180);
+	  range[0] = lambda0$1, range[1] = lambda1;
+	  p0 = null;
+	} // Finds the left-right distance between two longitudes.
+	// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
+	// the distance between ±180° to be 360°.
+
+
+	function angle(lambda0, lambda1) {
+	  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
 	}
 
-	function centroidRingEnd$1() {
-	  centroidPointRing(x00$1, y00$1);
+	function rangeCompare(a, b) {
+	  return a[0] - b[0];
 	}
 
-	function centroidPointFirstRing(x, y) {
-	  centroidStream$1.point = centroidPointRing;
-	  centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);
+	function rangeContains(range, x) {
+	  return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
 	}
 
-	function centroidPointRing(x, y) {
-	  var dx = x - x0$3,
-	      dy = y - y0$3,
-	      z = sqrt(dx * dx + dy * dy);
+	function d3_geoBounds (feature) {
+	  var i, n, a, b, merged, deltaMax, delta;
+	  phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
+	  ranges = [];
+	  d3_geoStream(feature, boundsStream$1); // First, sort ranges by their minimum longitudes.
 
-	  X1$1 += z * (x0$3 + x) / 2;
-	  Y1$1 += z * (y0$3 + y) / 2;
-	  Z1$1 += z;
+	  if (n = ranges.length) {
+	    ranges.sort(rangeCompare); // Then, merge any ranges that overlap.
 
-	  z = y0$3 * x - x0$3 * y;
-	  X2$1 += z * (x0$3 + x);
-	  Y2$1 += z * (y0$3 + y);
-	  Z2$1 += z * 3;
-	  centroidPoint$1(x0$3 = x, y0$3 = y);
-	}
+	    for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
+	      b = ranges[i];
 
-	function PathContext(context) {
-	  this._context = context;
-	}
-
-	PathContext.prototype = {
-	  _radius: 4.5,
-	  pointRadius: function(_) {
-	    return this._radius = _, this;
-	  },
-	  polygonStart: function() {
-	    this._line = 0;
-	  },
-	  polygonEnd: function() {
-	    this._line = NaN;
-	  },
-	  lineStart: function() {
-	    this._point = 0;
-	  },
-	  lineEnd: function() {
-	    if (this._line === 0) { this._context.closePath(); }
-	    this._point = NaN;
-	  },
-	  point: function(x, y) {
-	    switch (this._point) {
-	      case 0: {
-	        this._context.moveTo(x, y);
-	        this._point = 1;
-	        break;
-	      }
-	      case 1: {
-	        this._context.lineTo(x, y);
-	        break;
-	      }
-	      default: {
-	        this._context.moveTo(x + this._radius, y);
-	        this._context.arc(x, y, this._radius, 0, tau);
-	        break;
+	      if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
+	        if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
+	        if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
+	      } else {
+	        merged.push(a = b);
 	      }
+	    } // Finally, find the largest gap between the merged ranges.
+	    // The final bounding box will be the inverse of this gap.
+
+
+	    for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
+	      b = merged[i];
+	      if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];
 	    }
-	  },
-	  result: noop$2
-	};
+	  }
 
-	var lengthSum$1 = adder(),
-	    lengthRing,
-	    x00$2,
-	    y00$2,
-	    x0$4,
-	    y0$4;
+	  ranges = range = null;
+	  return lambda0$1 === Infinity || phi0 === Infinity ? [[NaN, NaN], [NaN, NaN]] : [[lambda0$1, phi0], [lambda1, phi1]];
+	}
 
-	var lengthStream$1 = {
-	  point: noop$2,
-	  lineStart: function() {
-	    lengthStream$1.point = lengthPointFirst$1;
-	  },
-	  lineEnd: function() {
-	    if (lengthRing) { lengthPoint$1(x00$2, y00$2); }
-	    lengthStream$1.point = noop$2;
-	  },
-	  polygonStart: function() {
-	    lengthRing = true;
-	  },
-	  polygonEnd: function() {
-	    lengthRing = null;
-	  },
-	  result: function() {
-	    var length = +lengthSum$1;
-	    lengthSum$1.reset();
-	    return length;
+	function compose (a, b) {
+	  function compose(x, y) {
+	    return x = a(x, y), b(x[0], x[1]);
 	  }
-	};
 
-	function lengthPointFirst$1(x, y) {
-	  lengthStream$1.point = lengthPoint$1;
-	  x00$2 = x0$4 = x, y00$2 = y0$4 = y;
+	  if (a.invert && b.invert) compose.invert = function (x, y) {
+	    return x = b.invert(x, y), x && a.invert(x[0], x[1]);
+	  };
+	  return compose;
 	}
 
-	function lengthPoint$1(x, y) {
-	  x0$4 -= x, y0$4 -= y;
-	  lengthSum$1.add(sqrt(x0$4 * x0$4 + y0$4 * y0$4));
-	  x0$4 = x, y0$4 = y;
+	function rotationIdentity(lambda, phi) {
+	  return [abs$2(lambda) > pi ? lambda + Math.round(-lambda / tau) * tau : lambda, phi];
 	}
 
-	function PathString() {
-	  this._string = [];
+	rotationIdentity.invert = rotationIdentity;
+	function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
+	  return (deltaLambda %= tau) ? deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma)) : rotationLambda(deltaLambda) : deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma) : rotationIdentity;
 	}
 
-	PathString.prototype = {
-	  _radius: 4.5,
-	  _circle: circle(4.5),
-	  pointRadius: function(_) {
-	    if ((_ = +_) !== this._radius) { this._radius = _, this._circle = null; }
-	    return this;
-	  },
-	  polygonStart: function() {
-	    this._line = 0;
-	  },
-	  polygonEnd: function() {
-	    this._line = NaN;
-	  },
-	  lineStart: function() {
-	    this._point = 0;
-	  },
-	  lineEnd: function() {
-	    if (this._line === 0) { this._string.push("Z"); }
-	    this._point = NaN;
-	  },
-	  point: function(x, y) {
-	    switch (this._point) {
-	      case 0: {
-	        this._string.push("M", x, ",", y);
-	        this._point = 1;
-	        break;
-	      }
-	      case 1: {
-	        this._string.push("L", x, ",", y);
-	        break;
-	      }
-	      default: {
-	        if (this._circle == null) { this._circle = circle(this._radius); }
-	        this._string.push("M", x, ",", y, this._circle);
-	        break;
-	      }
-	    }
-	  },
-	  result: function() {
-	    if (this._string.length) {
-	      var result = this._string.join("");
-	      this._string = [];
-	      return result;
-	    } else {
-	      return null;
-	    }
-	  }
-	};
+	function forwardRotationLambda(deltaLambda) {
+	  return function (lambda, phi) {
+	    return lambda += deltaLambda, [lambda > pi ? lambda - tau : lambda < -pi ? lambda + tau : lambda, phi];
+	  };
+	}
 
-	function circle(radius) {
-	  return "m0," + radius
-	      + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius
-	      + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius
-	      + "z";
+	function rotationLambda(deltaLambda) {
+	  var rotation = forwardRotationLambda(deltaLambda);
+	  rotation.invert = forwardRotationLambda(-deltaLambda);
+	  return rotation;
 	}
 
-	function d3_geoPath(projection, context) {
-	  var pointRadius = 4.5,
-	      projectionStream,
-	      contextStream;
+	function rotationPhiGamma(deltaPhi, deltaGamma) {
+	  var cosDeltaPhi = cos(deltaPhi),
+	      sinDeltaPhi = sin(deltaPhi),
+	      cosDeltaGamma = cos(deltaGamma),
+	      sinDeltaGamma = sin(deltaGamma);
 
-	  function path(object) {
-	    if (object) {
-	      if (typeof pointRadius === "function") { contextStream.pointRadius(+pointRadius.apply(this, arguments)); }
-	      d3_geoStream(object, projectionStream(contextStream));
-	    }
-	    return contextStream.result();
+	  function rotation(lambda, phi) {
+	    var cosPhi = cos(phi),
+	        x = cos(lambda) * cosPhi,
+	        y = sin(lambda) * cosPhi,
+	        z = sin(phi),
+	        k = z * cosDeltaPhi + x * sinDeltaPhi;
+	    return [atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi), asin(k * cosDeltaGamma + y * sinDeltaGamma)];
 	  }
 
-	  path.area = function(object) {
-	    d3_geoStream(object, projectionStream(areaStream$1));
-	    return areaStream$1.result();
+	  rotation.invert = function (lambda, phi) {
+	    var cosPhi = cos(phi),
+	        x = cos(lambda) * cosPhi,
+	        y = sin(lambda) * cosPhi,
+	        z = sin(phi),
+	        k = z * cosDeltaGamma - y * sinDeltaGamma;
+	    return [atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi), asin(k * cosDeltaPhi - x * sinDeltaPhi)];
 	  };
 
-	  path.measure = function(object) {
-	    d3_geoStream(object, projectionStream(lengthStream$1));
-	    return lengthStream$1.result();
-	  };
+	  return rotation;
+	}
 
-	  path.bounds = function(object) {
-	    d3_geoStream(object, projectionStream(boundsStream$1));
-	    return boundsStream$1.result();
-	  };
+	function rotation (rotate) {
+	  rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);
 
-	  path.centroid = function(object) {
-	    d3_geoStream(object, projectionStream(centroidStream$1));
-	    return centroidStream$1.result();
-	  };
+	  function forward(coordinates) {
+	    coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
+	    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
+	  }
 
-	  path.projection = function(_) {
-	    return arguments.length ? (projectionStream = _ == null ? (projection = null, identity) : (projection = _).stream, path) : projection;
+	  forward.invert = function (coordinates) {
+	    coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
+	    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
 	  };
 
-	  path.context = function(_) {
-	    if (!arguments.length) { return context; }
-	    contextStream = _ == null ? (context = null, new PathString) : new PathContext(context = _);
-	    if (typeof pointRadius !== "function") { contextStream.pointRadius(pointRadius); }
-	    return path;
-	  };
+	  return forward;
+	}
 
-	  path.pointRadius = function(_) {
-	    if (!arguments.length) { return pointRadius; }
-	    pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
-	    return path;
-	  };
+	function circleStream(stream, radius, delta, direction, t0, t1) {
+	  if (!delta) return;
+	  var cosRadius = cos(radius),
+	      sinRadius = sin(radius),
+	      step = direction * delta;
 
-	  return path.projection(projection).context(context);
+	  if (t0 == null) {
+	    t0 = radius + direction * tau;
+	    t1 = radius - step / 2;
+	  } else {
+	    t0 = circleRadius(cosRadius, t0);
+	    t1 = circleRadius(cosRadius, t1);
+	    if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau;
+	  }
+
+	  for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
+	    point = spherical([cosRadius, -sinRadius * cos(t), -sinRadius * sin(t)]);
+	    stream.point(point[0], point[1]);
+	  }
+	} // Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
+
+	function circleRadius(cosRadius, point) {
+	  point = cartesian(point), point[0] -= cosRadius;
+	  cartesianNormalizeInPlace(point);
+	  var radius = acos(-point[1]);
+	  return ((-point[2] < 0 ? -radius : radius) + tau - epsilon$1) % tau;
 	}
 
-	function d3_geoTransform(methods) {
+	function clipBuffer () {
+	  var lines = [],
+	      line;
 	  return {
-	    stream: transformer(methods)
+	    point: function point(x, y, m) {
+	      line.push([x, y, m]);
+	    },
+	    lineStart: function lineStart() {
+	      lines.push(line = []);
+	    },
+	    lineEnd: noop$1,
+	    rejoin: function rejoin() {
+	      if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
+	    },
+	    result: function result() {
+	      var result = lines;
+	      lines = [];
+	      line = null;
+	      return result;
+	    }
 	  };
 	}
 
-	function transformer(methods) {
-	  return function(stream) {
-	    var s = new TransformStream;
-	    for (var key in methods) { s[key] = methods[key]; }
-	    s.stream = stream;
-	    return s;
-	  };
+	function pointEqual (a, b) {
+	  return abs$2(a[0] - b[0]) < epsilon$1 && abs$2(a[1] - b[1]) < epsilon$1;
 	}
 
-	function TransformStream() {}
+	function Intersection(point, points, other, entry) {
+	  this.x = point;
+	  this.z = points;
+	  this.o = other; // another intersection
 
-	TransformStream.prototype = {
-	  constructor: TransformStream,
-	  point: function(x, y) { this.stream.point(x, y); },
-	  sphere: function() { this.stream.sphere(); },
-	  lineStart: function() { this.stream.lineStart(); },
-	  lineEnd: function() { this.stream.lineEnd(); },
-	  polygonStart: function() { this.stream.polygonStart(); },
-	  polygonEnd: function() { this.stream.polygonEnd(); }
-	};
+	  this.e = entry; // is an entry?
 
-	function fit(projection, fitBounds, object) {
-	  var clip = projection.clipExtent && projection.clipExtent();
-	  projection.scale(150).translate([0, 0]);
-	  if (clip != null) { projection.clipExtent(null); }
-	  d3_geoStream(object, projection.stream(boundsStream$1));
-	  fitBounds(boundsStream$1.result());
-	  if (clip != null) { projection.clipExtent(clip); }
-	  return projection;
-	}
+	  this.v = false; // visited
 
-	function fitExtent(projection, extent, object) {
-	  return fit(projection, function(b) {
-	    var w = extent[1][0] - extent[0][0],
-	        h = extent[1][1] - extent[0][1],
-	        k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
-	        x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
-	        y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;
-	    projection.scale(150 * k).translate([x, y]);
-	  }, object);
-	}
+	  this.n = this.p = null; // next & previous
+	} // A generalized polygon clipping algorithm: given a polygon that has been cut
+	// into its visible line segments, and rejoins the segments by interpolating
+	// along the clip edge.
 
-	function fitSize(projection, size, object) {
-	  return fitExtent(projection, [[0, 0], size], object);
-	}
 
-	function fitWidth(projection, width, object) {
-	  return fit(projection, function(b) {
-	    var w = +width,
-	        k = w / (b[1][0] - b[0][0]),
-	        x = (w - k * (b[1][0] + b[0][0])) / 2,
-	        y = -k * b[0][1];
-	    projection.scale(150 * k).translate([x, y]);
-	  }, object);
-	}
+	function clipRejoin (segments, compareIntersection, startInside, interpolate, stream) {
+	  var subject = [],
+	      clip = [],
+	      i,
+	      n;
+	  segments.forEach(function (segment) {
+	    if ((n = segment.length - 1) <= 0) return;
+	    var n,
+	        p0 = segment[0],
+	        p1 = segment[n],
+	        x;
 
-	function fitHeight(projection, height, object) {
-	  return fit(projection, function(b) {
-	    var h = +height,
-	        k = h / (b[1][1] - b[0][1]),
-	        x = -k * b[0][0],
-	        y = (h - k * (b[1][1] + b[0][1])) / 2;
-	    projection.scale(150 * k).translate([x, y]);
-	  }, object);
-	}
+	    if (pointEqual(p0, p1)) {
+	      if (!p0[2] && !p1[2]) {
+	        stream.lineStart();
 
-	var maxDepth = 16, // maximum depth of subdivision
-	    cosMinDistance = cos(30 * radians); // cos(minimum angular distance)
+	        for (i = 0; i < n; ++i) {
+	          stream.point((p0 = segment[i])[0], p0[1]);
+	        }
 
-	function resample(project, delta2) {
-	  return +delta2 ? resample$1(project, delta2) : resampleNone(project);
-	}
+	        stream.lineEnd();
+	        return;
+	      } // handle degenerate cases by moving the point
 
-	function resampleNone(project) {
-	  return transformer({
-	    point: function(x, y) {
-	      x = project(x, y);
-	      this.stream.point(x[0], x[1]);
+
+	      p1[0] += 2 * epsilon$1;
 	    }
-	  });
-	}
 
-	function resample$1(project, delta2) {
+	    subject.push(x = new Intersection(p0, segment, null, true));
+	    clip.push(x.o = new Intersection(p0, null, x, false));
+	    subject.push(x = new Intersection(p1, segment, null, false));
+	    clip.push(x.o = new Intersection(p1, null, x, true));
+	  });
+	  if (!subject.length) return;
+	  clip.sort(compareIntersection);
+	  link(subject);
+	  link(clip);
 
-	  function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
-	    var dx = x1 - x0,
-	        dy = y1 - y0,
-	        d2 = dx * dx + dy * dy;
-	    if (d2 > 4 * delta2 && depth--) {
-	      var a = a0 + a1,
-	          b = b0 + b1,
-	          c = c0 + c1,
-	          m = sqrt(a * a + b * b + c * c),
-	          phi2 = asin(c /= m),
-	          lambda2 = abs$2(abs$2(c) - 1) < epsilon || abs$2(lambda0 - lambda1) < epsilon ? (lambda0 + lambda1) / 2 : atan2(b, a),
-	          p = project(lambda2, phi2),
-	          x2 = p[0],
-	          y2 = p[1],
-	          dx2 = x2 - x0,
-	          dy2 = y2 - y0,
-	          dz = dy * dx2 - dx * dy2;
-	      if (dz * dz / d2 > delta2 // perpendicular projected distance
-	          || abs$2((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
-	          || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance
-	        resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
-	        stream.point(x2, y2);
-	        resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
-	      }
-	    }
+	  for (i = 0, n = clip.length; i < n; ++i) {
+	    clip[i].e = startInside = !startInside;
 	  }
-	  return function(stream) {
-	    var lambda00, x00, y00, a00, b00, c00, // first point
-	        lambda0, x0, y0, a0, b0, c0; // previous point
-
-	    var resampleStream = {
-	      point: point,
-	      lineStart: lineStart,
-	      lineEnd: lineEnd,
-	      polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; },
-	      polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; }
-	    };
 
-	    function point(x, y) {
-	      x = project(x, y);
-	      stream.point(x[0], x[1]);
-	    }
+	  var start = subject[0],
+	      points,
+	      point;
 
-	    function lineStart() {
-	      x0 = NaN;
-	      resampleStream.point = linePoint;
-	      stream.lineStart();
-	    }
+	  while (1) {
+	    // Find first unvisited intersection.
+	    var current = start,
+	        isSubject = true;
 
-	    function linePoint(lambda, phi) {
-	      var c = cartesian([lambda, phi]), p = project(lambda, phi);
-	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
-	      stream.point(x0, y0);
+	    while (current.v) {
+	      if ((current = current.n) === start) return;
 	    }
 
-	    function lineEnd() {
-	      resampleStream.point = point;
-	      stream.lineEnd();
-	    }
+	    points = current.z;
+	    stream.lineStart();
 
-	    function ringStart() {
-	      lineStart();
-	      resampleStream.point = ringPoint;
-	      resampleStream.lineEnd = ringEnd;
-	    }
+	    do {
+	      current.v = current.o.v = true;
 
-	    function ringPoint(lambda, phi) {
-	      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
-	      resampleStream.point = linePoint;
-	    }
+	      if (current.e) {
+	        if (isSubject) {
+	          for (i = 0, n = points.length; i < n; ++i) {
+	            stream.point((point = points[i])[0], point[1]);
+	          }
+	        } else {
+	          interpolate(current.x, current.n.x, 1, stream);
+	        }
 
-	    function ringEnd() {
-	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
-	      resampleStream.lineEnd = lineEnd;
-	      lineEnd();
-	    }
+	        current = current.n;
+	      } else {
+	        if (isSubject) {
+	          points = current.p.z;
 
-	    return resampleStream;
-	  };
-	}
+	          for (i = points.length - 1; i >= 0; --i) {
+	            stream.point((point = points[i])[0], point[1]);
+	          }
+	        } else {
+	          interpolate(current.x, current.p.x, -1, stream);
+	        }
 
-	var transformRadians = transformer({
-	  point: function(x, y) {
-	    this.stream.point(x * radians, y * radians);
-	  }
-	});
+	        current = current.p;
+	      }
 
-	function transformRotate(rotate) {
-	  return transformer({
-	    point: function(x, y) {
-	      var r = rotate(x, y);
-	      return this.stream.point(r[0], r[1]);
-	    }
-	  });
-	}
+	      current = current.o;
+	      points = current.z;
+	      isSubject = !isSubject;
+	    } while (!current.v);
 
-	function scaleTranslate(k, dx, dy, sx, sy) {
-	  function transform(x, y) {
-	    x *= sx; y *= sy;
-	    return [dx + k * x, dy - k * y];
+	    stream.lineEnd();
 	  }
-	  transform.invert = function(x, y) {
-	    return [(x - dx) / k * sx, (dy - y) / k * sy];
-	  };
-	  return transform;
 	}
 
-	function scaleTranslateRotate(k, dx, dy, sx, sy, alpha) {
-	  var cosAlpha = cos(alpha),
-	      sinAlpha = sin(alpha),
-	      a = cosAlpha * k,
-	      b = sinAlpha * k,
-	      ai = cosAlpha / k,
-	      bi = sinAlpha / k,
-	      ci = (sinAlpha * dy - cosAlpha * dx) / k,
-	      fi = (sinAlpha * dx + cosAlpha * dy) / k;
-	  function transform(x, y) {
-	    x *= sx; y *= sy;
-	    return [a * x - b * y + dx, dy - b * x - a * y];
+	function link(array) {
+	  if (!(n = array.length)) return;
+	  var n,
+	      i = 0,
+	      a = array[0],
+	      b;
+
+	  while (++i < n) {
+	    a.n = b = array[i];
+	    b.p = a;
+	    a = b;
 	  }
-	  transform.invert = function(x, y) {
-	    return [sx * (ai * x - bi * y + ci), sy * (fi - bi * x - ai * y)];
-	  };
-	  return transform;
+
+	  a.n = b = array[0];
+	  b.p = a;
 	}
 
-	function projection(project) {
-	  return projectionMutator(function() { return project; })();
+	function longitude(point) {
+	  if (abs$2(point[0]) <= pi) return point[0];else return sign(point[0]) * ((abs$2(point[0]) + pi) % tau - pi);
 	}
 
-	function projectionMutator(projectAt) {
-	  var project,
-	      k = 150, // scale
-	      x = 480, y = 250, // translate
-	      lambda = 0, phi = 0, // center
-	      deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, // pre-rotate
-	      alpha = 0, // post-rotate angle
-	      sx = 1, // reflectX
-	      sy = 1, // reflectX
-	      theta = null, preclip = clipAntimeridian, // pre-clip angle
-	      x0 = null, y0, x1, y1, postclip = identity, // post-clip extent
-	      delta2 = 0.5, // precision
-	      projectResample,
-	      projectTransform,
-	      projectRotateTransform,
-	      cache,
-	      cacheStream;
+	function polygonContains (polygon, point) {
+	  var lambda = longitude(point),
+	      phi = point[1],
+	      sinPhi = sin(phi),
+	      normal = [sin(lambda), -cos(lambda), 0],
+	      angle = 0,
+	      winding = 0;
+	  var sum = new Adder();
+	  if (sinPhi === 1) phi = halfPi + epsilon$1;else if (sinPhi === -1) phi = -halfPi - epsilon$1;
 
-	  function projection(point) {
-	    return projectRotateTransform(point[0] * radians, point[1] * radians);
-	  }
+	  for (var i = 0, n = polygon.length; i < n; ++i) {
+	    if (!(m = (ring = polygon[i]).length)) continue;
+	    var ring,
+	        m,
+	        point0 = ring[m - 1],
+	        lambda0 = longitude(point0),
+	        phi0 = point0[1] / 2 + quarterPi,
+	        sinPhi0 = sin(phi0),
+	        cosPhi0 = cos(phi0);
 
-	  function invert(point) {
-	    point = projectRotateTransform.invert(point[0], point[1]);
-	    return point && [point[0] * degrees, point[1] * degrees];
-	  }
+	    for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
+	      var point1 = ring[j],
+	          lambda1 = longitude(point1),
+	          phi1 = point1[1] / 2 + quarterPi,
+	          sinPhi1 = sin(phi1),
+	          cosPhi1 = cos(phi1),
+	          delta = lambda1 - lambda0,
+	          sign = delta >= 0 ? 1 : -1,
+	          absDelta = sign * delta,
+	          antimeridian = absDelta > pi,
+	          k = sinPhi0 * sinPhi1;
+	      sum.add(atan2(k * sign * sin(absDelta), cosPhi0 * cosPhi1 + k * cos(absDelta)));
+	      angle += antimeridian ? delta + sign * tau : delta; // Are the longitudes either side of the point’s meridian (lambda),
+	      // and are the latitudes smaller than the parallel (phi)?
 
-	  projection.stream = function(stream) {
-	    return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
-	  };
+	      if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
+	        var arc = cartesianCross(cartesian(point0), cartesian(point1));
+	        cartesianNormalizeInPlace(arc);
+	        var intersection = cartesianCross(normal, arc);
+	        cartesianNormalizeInPlace(intersection);
+	        var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);
 
-	  projection.preclip = function(_) {
-	    return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
-	  };
+	        if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
+	          winding += antimeridian ^ delta >= 0 ? 1 : -1;
+	        }
+	      }
+	    }
+	  } // First, determine whether the South pole is inside or outside:
+	  //
+	  // It is inside if:
+	  // * the polygon winds around it in a clockwise direction.
+	  // * the polygon does not (cumulatively) wind around it, but has a negative
+	  //   (counter-clockwise) area.
+	  //
+	  // Second, count the (signed) number of times a segment crosses a lambda
+	  // from the point to the South pole.  If it is zero, then the point is the
+	  // same side as the South pole.
 
-	  projection.postclip = function(_) {
-	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
-	  };
 
-	  projection.clipAngle = function(_) {
-	    return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees;
-	  };
+	  return (angle < -epsilon$1 || angle < epsilon$1 && sum < -epsilon2$1) ^ winding & 1;
+	}
 
-	  projection.clipExtent = function(_) {
-	    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
-	  };
+	function clip (pointVisible, clipLine, interpolate, start) {
+	  return function (sink) {
+	    var line = clipLine(sink),
+	        ringBuffer = clipBuffer(),
+	        ringSink = clipLine(ringBuffer),
+	        polygonStarted = false,
+	        polygon,
+	        segments,
+	        ring;
+	    var clip = {
+	      point: point,
+	      lineStart: lineStart,
+	      lineEnd: lineEnd,
+	      polygonStart: function polygonStart() {
+	        clip.point = pointRing;
+	        clip.lineStart = ringStart;
+	        clip.lineEnd = ringEnd;
+	        segments = [];
+	        polygon = [];
+	      },
+	      polygonEnd: function polygonEnd() {
+	        clip.point = point;
+	        clip.lineStart = lineStart;
+	        clip.lineEnd = lineEnd;
+	        segments = merge$4(segments);
+	        var startInside = polygonContains(polygon, start);
 
-	  projection.scale = function(_) {
-	    return arguments.length ? (k = +_, recenter()) : k;
-	  };
+	        if (segments.length) {
+	          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+	          clipRejoin(segments, compareIntersection, startInside, interpolate, sink);
+	        } else if (startInside) {
+	          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+	          sink.lineStart();
+	          interpolate(null, null, 1, sink);
+	          sink.lineEnd();
+	        }
 
-	  projection.translate = function(_) {
-	    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
-	  };
+	        if (polygonStarted) sink.polygonEnd(), polygonStarted = false;
+	        segments = polygon = null;
+	      },
+	      sphere: function sphere() {
+	        sink.polygonStart();
+	        sink.lineStart();
+	        interpolate(null, null, 1, sink);
+	        sink.lineEnd();
+	        sink.polygonEnd();
+	      }
+	    };
 
-	  projection.center = function(_) {
-	    return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees, phi * degrees];
-	  };
+	    function point(lambda, phi) {
+	      if (pointVisible(lambda, phi)) sink.point(lambda, phi);
+	    }
 
-	  projection.rotate = function(_) {
-	    return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees, deltaPhi * degrees, deltaGamma * degrees];
-	  };
+	    function pointLine(lambda, phi) {
+	      line.point(lambda, phi);
+	    }
 
-	  projection.angle = function(_) {
-	    return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees;
-	  };
+	    function lineStart() {
+	      clip.point = pointLine;
+	      line.lineStart();
+	    }
 
-	  projection.reflectX = function(_) {
-	    return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;
-	  };
-
-	  projection.reflectY = function(_) {
-	    return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;
-	  };
+	    function lineEnd() {
+	      clip.point = point;
+	      line.lineEnd();
+	    }
 
-	  projection.precision = function(_) {
-	    return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
-	  };
+	    function pointRing(lambda, phi) {
+	      ring.push([lambda, phi]);
+	      ringSink.point(lambda, phi);
+	    }
 
-	  projection.fitExtent = function(extent, object) {
-	    return fitExtent(projection, extent, object);
-	  };
+	    function ringStart() {
+	      ringSink.lineStart();
+	      ring = [];
+	    }
 
-	  projection.fitSize = function(size, object) {
-	    return fitSize(projection, size, object);
-	  };
+	    function ringEnd() {
+	      pointRing(ring[0][0], ring[0][1]);
+	      ringSink.lineEnd();
+	      var clean = ringSink.clean(),
+	          ringSegments = ringBuffer.result(),
+	          i,
+	          n = ringSegments.length,
+	          m,
+	          segment,
+	          point;
+	      ring.pop();
+	      polygon.push(ring);
+	      ring = null;
+	      if (!n) return; // No intersections.
 
-	  projection.fitWidth = function(width, object) {
-	    return fitWidth(projection, width, object);
-	  };
+	      if (clean & 1) {
+	        segment = ringSegments[0];
 
-	  projection.fitHeight = function(height, object) {
-	    return fitHeight(projection, height, object);
-	  };
+	        if ((m = segment.length - 1) > 0) {
+	          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+	          sink.lineStart();
 
-	  function recenter() {
-	    var center = scaleTranslateRotate(k, 0, 0, sx, sy, alpha).apply(null, project(lambda, phi)),
-	        transform = (alpha ? scaleTranslateRotate : scaleTranslate)(k, x - center[0], y - center[1], sx, sy, alpha);
-	    rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);
-	    projectTransform = compose(project, transform);
-	    projectRotateTransform = compose(rotate, projectTransform);
-	    projectResample = resample(projectTransform, delta2);
-	    return reset();
-	  }
+	          for (i = 0; i < m; ++i) {
+	            sink.point((point = segment[i])[0], point[1]);
+	          }
 
-	  function reset() {
-	    cache = cacheStream = null;
-	    return projection;
-	  }
+	          sink.lineEnd();
+	        }
 
-	  return function() {
-	    project = projectAt.apply(this, arguments);
-	    projection.invert = project.invert && invert;
-	    return recenter();
-	  };
-	}
+	        return;
+	      } // Rejoin connected segments.
+	      // TODO reuse ringBuffer.rejoin()?
 
-	function mercatorRaw(lambda, phi) {
-	  return [lambda, log(tan((halfPi + phi) / 2))];
-	}
 
-	mercatorRaw.invert = function(x, y) {
-	  return [x, 2 * atan(exp(y)) - halfPi];
-	};
+	      if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));
+	      segments.push(ringSegments.filter(validSegment));
+	    }
 
-	function mercator() {
-	  return mercatorProjection(mercatorRaw)
-	      .scale(961 / tau);
+	    return clip;
+	  };
 	}
 
-	function mercatorProjection(project) {
-	  var m = projection(project),
-	      center = m.center,
-	      scale = m.scale,
-	      translate = m.translate,
-	      clipExtent = m.clipExtent,
-	      x0 = null, y0, x1, y1; // clip extent
+	function validSegment(segment) {
+	  return segment.length > 1;
+	} // Intersections are sorted along the clip edge. For both antimeridian cutting
+	// and circle clipping, the same comparison is used.
 
-	  m.scale = function(_) {
-	    return arguments.length ? (scale(_), reclip()) : scale();
-	  };
 
-	  m.translate = function(_) {
-	    return arguments.length ? (translate(_), reclip()) : translate();
-	  };
+	function compareIntersection(a, b) {
+	  return ((a = a.x)[0] < 0 ? a[1] - halfPi - epsilon$1 : halfPi - a[1]) - ((b = b.x)[0] < 0 ? b[1] - halfPi - epsilon$1 : halfPi - b[1]);
+	}
 
-	  m.center = function(_) {
-	    return arguments.length ? (center(_), reclip()) : center();
-	  };
+	var clipAntimeridian = clip(function () {
+	  return true;
+	}, clipAntimeridianLine, clipAntimeridianInterpolate, [-pi, -halfPi]); // Takes a line and cuts into visible segments. Return values: 0 - there were
+	// intersections or the line was empty; 1 - no intersections; 2 - there were
+	// intersections, and the first and last segments should be rejoined.
 
-	  m.clipExtent = function(_) {
-	    return arguments.length ? ((_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1])), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
-	  };
+	function clipAntimeridianLine(stream) {
+	  var lambda0 = NaN,
+	      phi0 = NaN,
+	      sign0 = NaN,
+	      _clean; // no intersections
 
-	  function reclip() {
-	    var k = pi * scale(),
-	        t = m(rotation(m.rotate()).invert([0, 0]));
-	    return clipExtent(x0 == null
-	        ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw
-	        ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]]
-	        : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);
-	  }
 
-	  return reclip();
-	}
+	  return {
+	    lineStart: function lineStart() {
+	      stream.lineStart();
+	      _clean = 1;
+	    },
+	    point: function point(lambda1, phi1) {
+	      var sign1 = lambda1 > 0 ? pi : -pi,
+	          delta = abs$2(lambda1 - lambda0);
 
-	function d3_geoIdentity() {
-	  var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, // scale, translate and reflect
-	      alpha = 0, ca, sa, // angle
-	      x0 = null, y0, x1, y1, // clip extent
-	      kx = 1, ky = 1,
-	      transform = transformer({
-	        point: function(x, y) {
-	          var p = projection([x, y]);
-	          this.stream.point(p[0], p[1]);
-	        }
-	      }),
-	      postclip = identity,
-	      cache,
-	      cacheStream;
+	      if (abs$2(delta - pi) < epsilon$1) {
+	        // line crosses a pole
+	        stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi : -halfPi);
+	        stream.point(sign0, phi0);
+	        stream.lineEnd();
+	        stream.lineStart();
+	        stream.point(sign1, phi0);
+	        stream.point(lambda1, phi0);
+	        _clean = 0;
+	      } else if (sign0 !== sign1 && delta >= pi) {
+	        // line crosses antimeridian
+	        if (abs$2(lambda0 - sign0) < epsilon$1) lambda0 -= sign0 * epsilon$1; // handle degeneracies
 
-	  function reset() {
-	    kx = k * sx;
-	    ky = k * sy;
-	    cache = cacheStream = null;
-	    return projection;
-	  }
+	        if (abs$2(lambda1 - sign1) < epsilon$1) lambda1 -= sign1 * epsilon$1;
+	        phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
+	        stream.point(sign0, phi0);
+	        stream.lineEnd();
+	        stream.lineStart();
+	        stream.point(sign1, phi0);
+	        _clean = 0;
+	      }
 
-	  function projection (p) {
-	    var x = p[0] * kx, y = p[1] * ky;
-	    if (alpha) {
-	      var t = y * ca - x * sa;
-	      x = x * ca + y * sa;
-	      y = t;
-	    }    
-	    return [x + tx, y + ty];
-	  }
-	  projection.invert = function(p) {
-	    var x = p[0] - tx, y = p[1] - ty;
-	    if (alpha) {
-	      var t = y * ca + x * sa;
-	      x = x * ca - y * sa;
-	      y = t;
+	      stream.point(lambda0 = lambda1, phi0 = phi1);
+	      sign0 = sign1;
+	    },
+	    lineEnd: function lineEnd() {
+	      stream.lineEnd();
+	      lambda0 = phi0 = NaN;
+	    },
+	    clean: function clean() {
+	      return 2 - _clean; // if intersections, rejoin first and last segments
 	    }
-	    return [x / kx, y / ky];
-	  };
-	  projection.stream = function(stream) {
-	    return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));
-	  };
-	  projection.postclip = function(_) {
-	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
-	  };
-	  projection.clipExtent = function(_) {
-	    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
-	  };
-	  projection.scale = function(_) {
-	    return arguments.length ? (k = +_, reset()) : k;
-	  };
-	  projection.translate = function(_) {
-	    return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];
-	  };
-	  projection.angle = function(_) {
-	    return arguments.length ? (alpha = _ % 360 * radians, sa = sin(alpha), ca = cos(alpha), reset()) : alpha * degrees;
-	  };
-	  projection.reflectX = function(_) {
-	    return arguments.length ? (sx = _ ? -1 : 1, reset()) : sx < 0;
-	  };
-	  projection.reflectY = function(_) {
-	    return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;
-	  };
-	  projection.fitExtent = function(extent, object) {
-	    return fitExtent(projection, extent, object);
-	  };
-	  projection.fitSize = function(size, object) {
-	    return fitSize(projection, size, object);
-	  };
-	  projection.fitWidth = function(width, object) {
-	    return fitWidth(projection, width, object);
-	  };
-	  projection.fitHeight = function(height, object) {
-	    return fitHeight(projection, height, object);
 	  };
-
-	  return projection;
 	}
 
-	// constants
-	var TAU = 2 * Math.PI;
-	var EQUATORIAL_RADIUS = 6356752.314245179;
-	var POLAR_RADIUS = 6378137.0;
+	function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
+	  var cosPhi0,
+	      cosPhi1,
+	      sinLambda0Lambda1 = sin(lambda0 - lambda1);
+	  return abs$2(sinLambda0Lambda1) > epsilon$1 ? atan((sin(phi0) * (cosPhi1 = cos(phi1)) * sin(lambda1) - sin(phi1) * (cosPhi0 = cos(phi0)) * sin(lambda0)) / (cosPhi0 * cosPhi1 * sinLambda0Lambda1)) : (phi0 + phi1) / 2;
+	}
 
+	function clipAntimeridianInterpolate(from, to, direction, stream) {
+	  var phi;
 
-	function geoLatToMeters(dLat) {
-	    return dLat * (TAU * POLAR_RADIUS / 360);
+	  if (from == null) {
+	    phi = direction * halfPi;
+	    stream.point(-pi, phi);
+	    stream.point(0, phi);
+	    stream.point(pi, phi);
+	    stream.point(pi, 0);
+	    stream.point(pi, -phi);
+	    stream.point(0, -phi);
+	    stream.point(-pi, -phi);
+	    stream.point(-pi, 0);
+	    stream.point(-pi, phi);
+	  } else if (abs$2(from[0] - to[0]) > epsilon$1) {
+	    var lambda = from[0] < to[0] ? pi : -pi;
+	    phi = direction * lambda / 2;
+	    stream.point(-lambda, phi);
+	    stream.point(0, phi);
+	    stream.point(lambda, phi);
+	  } else {
+	    stream.point(to[0], to[1]);
+	  }
 	}
 
+	function clipCircle (radius) {
+	  var cr = cos(radius),
+	      delta = 6 * radians,
+	      smallRadius = cr > 0,
+	      notHemisphere = abs$2(cr) > epsilon$1; // TODO optimise for this common case
 
-	function geoLonToMeters(dLon, atLat) {
-	    return Math.abs(atLat) >= 90 ? 0 :
-	        dLon * (TAU * EQUATORIAL_RADIUS / 360) * Math.abs(Math.cos(atLat * (Math.PI / 180)));
-	}
+	  function interpolate(from, to, direction, stream) {
+	    circleStream(stream, radius, delta, direction, from, to);
+	  }
 
+	  function visible(lambda, phi) {
+	    return cos(lambda) * cos(phi) > cr;
+	  } // Takes a line and cuts into visible segments. Return values used for polygon
+	  // clipping: 0 - there were intersections or the line was empty; 1 - no
+	  // intersections 2 - there were intersections, and the first and last segments
+	  // should be rejoined.
 
-	function geoMetersToLat(m) {
-	    return m / (TAU * POLAR_RADIUS / 360);
-	}
 
+	  function clipLine(stream) {
+	    var point0, // previous point
+	    c0, // code for previous point
+	    v0, // visibility of previous point
+	    v00, // visibility of first point
+	    _clean; // no intersections
 
-	function geoMetersToLon(m, atLat) {
-	    return Math.abs(atLat) >= 90 ? 0 :
-	        m / (TAU * EQUATORIAL_RADIUS / 360) / Math.abs(Math.cos(atLat * (Math.PI / 180)));
-	}
 
+	    return {
+	      lineStart: function lineStart() {
+	        v00 = v0 = false;
+	        _clean = 1;
+	      },
+	      point: function point(lambda, phi) {
+	        var point1 = [lambda, phi],
+	            point2,
+	            v = visible(lambda, phi),
+	            c = smallRadius ? v ? 0 : code(lambda, phi) : v ? code(lambda + (lambda < 0 ? pi : -pi), phi) : 0;
+	        if (!point0 && (v00 = v0 = v)) stream.lineStart();
 
-	function geoMetersToOffset(meters, tileSize) {
-	    tileSize = tileSize || 256;
-	    return [
-	        meters[0] * tileSize / (TAU * EQUATORIAL_RADIUS),
-	        -meters[1] * tileSize / (TAU * POLAR_RADIUS)
-	    ];
-	}
+	        if (v !== v0) {
+	          point2 = intersect(point0, point1);
+	          if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2)) point1[2] = 1;
+	        }
 
+	        if (v !== v0) {
+	          _clean = 0;
 
-	function geoOffsetToMeters(offset, tileSize) {
-	    tileSize = tileSize || 256;
-	    return [
-	        offset[0] * TAU * EQUATORIAL_RADIUS / tileSize,
-	        -offset[1] * TAU * POLAR_RADIUS / tileSize
-	    ];
-	}
+	          if (v) {
+	            // outside going in
+	            stream.lineStart();
+	            point2 = intersect(point1, point0);
+	            stream.point(point2[0], point2[1]);
+	          } else {
+	            // inside going out
+	            point2 = intersect(point0, point1);
+	            stream.point(point2[0], point2[1], 2);
+	            stream.lineEnd();
+	          }
 
+	          point0 = point2;
+	        } else if (notHemisphere && point0 && smallRadius ^ v) {
+	          var t; // If the codes for two points are different, or are both zero,
+	          // and there this segment intersects with the small circle.
 
-	// Equirectangular approximation of spherical distances on Earth
-	function geoSphericalDistance(a, b) {
-	    var x = geoLonToMeters(a[0] - b[0], (a[1] + b[1]) / 2);
-	    var y = geoLatToMeters(a[1] - b[1]);
-	    return Math.sqrt((x * x) + (y * y));
-	}
+	          if (!(c & c0) && (t = intersect(point1, point0, true))) {
+	            _clean = 0;
+
+	            if (smallRadius) {
+	              stream.lineStart();
+	              stream.point(t[0][0], t[0][1]);
+	              stream.point(t[1][0], t[1][1]);
+	              stream.lineEnd();
+	            } else {
+	              stream.point(t[1][0], t[1][1]);
+	              stream.lineEnd();
+	              stream.lineStart();
+	              stream.point(t[0][0], t[0][1], 3);
+	            }
+	          }
+	        }
 
+	        if (v && (!point0 || !pointEqual(point0, point1))) {
+	          stream.point(point1[0], point1[1]);
+	        }
 
-	// scale to zoom
-	function geoScaleToZoom(k, tileSize) {
-	    tileSize = tileSize || 256;
-	    var log2ts = Math.log(tileSize) * Math.LOG2E;
-	    return Math.log(k * TAU) / Math.LN2 - log2ts;
-	}
+	        point0 = point1, v0 = v, c0 = c;
+	      },
+	      lineEnd: function lineEnd() {
+	        if (v0) stream.lineEnd();
+	        point0 = null;
+	      },
+	      // Rejoin first and last segments if there were intersections and the first
+	      // and last points were visible.
+	      clean: function clean() {
+	        return _clean | (v00 && v0) << 1;
+	      }
+	    };
+	  } // Intersects the great circle between a and b with the clip circle.
 
 
-	// zoom to scale
-	function geoZoomToScale(z, tileSize) {
-	    tileSize = tileSize || 256;
-	    return tileSize * Math.pow(2, z) / TAU;
-	}
+	  function intersect(a, b, two) {
+	    var pa = cartesian(a),
+	        pb = cartesian(b); // We have two planes, n1.p = d1 and n2.p = d2.
+	    // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
 
+	    var n1 = [1, 0, 0],
+	        // normal
+	    n2 = cartesianCross(pa, pb),
+	        n2n2 = cartesianDot(n2, n2),
+	        n1n2 = n2[0],
+	        // cartesianDot(n1, n2),
+	    determinant = n2n2 - n1n2 * n1n2; // Two polar points.
 
-	// returns info about the node from `nodes` closest to the given `point`
-	function geoSphericalClosestNode(nodes, point) {
-	    var minDistance = Infinity, distance;
-	    var indexOfMin;
+	    if (!determinant) return !two && a;
+	    var c1 = cr * n2n2 / determinant,
+	        c2 = -cr * n1n2 / determinant,
+	        n1xn2 = cartesianCross(n1, n2),
+	        A = cartesianScale(n1, c1),
+	        B = cartesianScale(n2, c2);
+	    cartesianAddInPlace(A, B); // Solve |p(t)|^2 = 1.
 
-	    for (var i in nodes) {
-	        distance = geoSphericalDistance(nodes[i].loc, point);
-	        if (distance < minDistance) {
-	            minDistance = distance;
-	            indexOfMin = i;
-	        }
-	    }
+	    var u = n1xn2,
+	        w = cartesianDot(A, u),
+	        uu = cartesianDot(u, u),
+	        t2 = w * w - uu * (cartesianDot(A, A) - 1);
+	    if (t2 < 0) return;
+	    var t = sqrt(t2),
+	        q = cartesianScale(u, (-w - t) / uu);
+	    cartesianAddInPlace(q, A);
+	    q = spherical(q);
+	    if (!two) return q; // Two intersection points.
 
-	    if (indexOfMin !== undefined) {
-	        return { index: indexOfMin, distance: minDistance, node: nodes[indexOfMin] };
-	    } else {
-	        return null;
-	    }
-	}
+	    var lambda0 = a[0],
+	        lambda1 = b[0],
+	        phi0 = a[1],
+	        phi1 = b[1],
+	        z;
+	    if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;
+	    var delta = lambda1 - lambda0,
+	        polar = abs$2(delta - pi) < epsilon$1,
+	        meridian = polar || delta < epsilon$1;
+	    if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z; // Check that the first point is between a and b.
 
-	function geoExtent(min, max) {
-	    if (!(this instanceof geoExtent)) {
-	        return new geoExtent(min, max);
-	    } else if (min instanceof geoExtent) {
-	        return min;
-	    } else if (min && min.length === 2 && min[0].length === 2 && min[1].length === 2) {
-	        this[0] = min[0];
-	        this[1] = min[1];
-	    } else {
-	        this[0] = min        || [ Infinity,  Infinity];
-	        this[1] = max || min || [-Infinity, -Infinity];
+	    if (meridian ? polar ? phi0 + phi1 > 0 ^ q[1] < (abs$2(q[0] - lambda0) < epsilon$1 ? phi0 : phi1) : phi0 <= q[1] && q[1] <= phi1 : delta > pi ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
+	      var q1 = cartesianScale(u, (-w + t) / uu);
+	      cartesianAddInPlace(q1, A);
+	      return [q, spherical(q1)];
 	    }
-	}
+	  } // Generates a 4-bit vector representing the location of a point relative to
+	  // the small circle's bounding box.
 
-	geoExtent.prototype = new Array(2);
 
-	Object.assign(geoExtent.prototype, {
+	  function code(lambda, phi) {
+	    var r = smallRadius ? radius : pi - radius,
+	        code = 0;
+	    if (lambda < -r) code |= 1; // left
+	    else if (lambda > r) code |= 2; // right
 
-	    equals: function (obj) {
-	        return this[0][0] === obj[0][0] &&
-	            this[0][1] === obj[0][1] &&
-	            this[1][0] === obj[1][0] &&
-	            this[1][1] === obj[1][1];
-	    },
+	    if (phi < -r) code |= 4; // below
+	    else if (phi > r) code |= 8; // above
 
+	    return code;
+	  }
 
-	    extend: function(obj) {
-	        if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-	        return geoExtent(
-	            [Math.min(obj[0][0], this[0][0]), Math.min(obj[0][1], this[0][1])],
-	            [Math.max(obj[1][0], this[1][0]), Math.max(obj[1][1], this[1][1])]
-	        );
-	    },
+	  return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi, radius - pi]);
+	}
 
+	function clipLine (a, b, x0, y0, x1, y1) {
+	  var ax = a[0],
+	      ay = a[1],
+	      bx = b[0],
+	      by = b[1],
+	      t0 = 0,
+	      t1 = 1,
+	      dx = bx - ax,
+	      dy = by - ay,
+	      r;
+	  r = x0 - ax;
+	  if (!dx && r > 0) return;
+	  r /= dx;
 
-	    _extend: function(extent) {
-	        this[0][0] = Math.min(extent[0][0], this[0][0]);
-	        this[0][1] = Math.min(extent[0][1], this[0][1]);
-	        this[1][0] = Math.max(extent[1][0], this[1][0]);
-	        this[1][1] = Math.max(extent[1][1], this[1][1]);
-	    },
+	  if (dx < 0) {
+	    if (r < t0) return;
+	    if (r < t1) t1 = r;
+	  } else if (dx > 0) {
+	    if (r > t1) return;
+	    if (r > t0) t0 = r;
+	  }
 
+	  r = x1 - ax;
+	  if (!dx && r < 0) return;
+	  r /= dx;
 
-	    area: function() {
-	        return Math.abs((this[1][0] - this[0][0]) * (this[1][1] - this[0][1]));
-	    },
+	  if (dx < 0) {
+	    if (r > t1) return;
+	    if (r > t0) t0 = r;
+	  } else if (dx > 0) {
+	    if (r < t0) return;
+	    if (r < t1) t1 = r;
+	  }
 
+	  r = y0 - ay;
+	  if (!dy && r > 0) return;
+	  r /= dy;
 
-	    center: function() {
-	        return [(this[0][0] + this[1][0]) / 2, (this[0][1] + this[1][1]) / 2];
-	    },
+	  if (dy < 0) {
+	    if (r < t0) return;
+	    if (r < t1) t1 = r;
+	  } else if (dy > 0) {
+	    if (r > t1) return;
+	    if (r > t0) t0 = r;
+	  }
 
+	  r = y1 - ay;
+	  if (!dy && r < 0) return;
+	  r /= dy;
 
-	    rectangle: function() {
-	        return [this[0][0], this[0][1], this[1][0], this[1][1]];
-	    },
+	  if (dy < 0) {
+	    if (r > t1) return;
+	    if (r > t0) t0 = r;
+	  } else if (dy > 0) {
+	    if (r < t0) return;
+	    if (r < t1) t1 = r;
+	  }
 
+	  if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
+	  if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
+	  return true;
+	}
 
-	    bbox: function() {
-	        return { minX: this[0][0], minY: this[0][1], maxX: this[1][0], maxY: this[1][1] };
-	    },
+	var clipMax = 1e9,
+	    clipMin = -clipMax; // TODO Use d3-polygon’s polygonContains here for the ring check?
+	// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?
 
+	function clipRectangle(x0, y0, x1, y1) {
+	  function visible(x, y) {
+	    return x0 <= x && x <= x1 && y0 <= y && y <= y1;
+	  }
 
-	    polygon: function() {
-	        return [
-	            [this[0][0], this[0][1]],
-	            [this[0][0], this[1][1]],
-	            [this[1][0], this[1][1]],
-	            [this[1][0], this[0][1]],
-	            [this[0][0], this[0][1]]
-	        ];
-	    },
+	  function interpolate(from, to, direction, stream) {
+	    var a = 0,
+	        a1 = 0;
 
+	    if (from == null || (a = corner(from, direction)) !== (a1 = corner(to, direction)) || comparePoint(from, to) < 0 ^ direction > 0) {
+	      do {
+	        stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
+	      } while ((a = (a + direction + 4) % 4) !== a1);
+	    } else {
+	      stream.point(to[0], to[1]);
+	    }
+	  }
 
-	    contains: function(obj) {
-	        if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-	        return obj[0][0] >= this[0][0] &&
-	               obj[0][1] >= this[0][1] &&
-	               obj[1][0] <= this[1][0] &&
-	               obj[1][1] <= this[1][1];
-	    },
+	  function corner(p, direction) {
+	    return abs$2(p[0] - x0) < epsilon$1 ? direction > 0 ? 0 : 3 : abs$2(p[0] - x1) < epsilon$1 ? direction > 0 ? 2 : 1 : abs$2(p[1] - y0) < epsilon$1 ? direction > 0 ? 1 : 0 : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
+	  }
 
+	  function compareIntersection(a, b) {
+	    return comparePoint(a.x, b.x);
+	  }
 
-	    intersects: function(obj) {
-	        if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-	        return obj[0][0] <= this[1][0] &&
-	               obj[0][1] <= this[1][1] &&
-	               obj[1][0] >= this[0][0] &&
-	               obj[1][1] >= this[0][1];
-	    },
+	  function comparePoint(a, b) {
+	    var ca = corner(a, 1),
+	        cb = corner(b, 1);
+	    return ca !== cb ? ca - cb : ca === 0 ? b[1] - a[1] : ca === 1 ? a[0] - b[0] : ca === 2 ? a[1] - b[1] : b[0] - a[0];
+	  }
 
+	  return function (stream) {
+	    var activeStream = stream,
+	        bufferStream = clipBuffer(),
+	        segments,
+	        polygon,
+	        ring,
+	        x__,
+	        y__,
+	        v__,
+	        // first point
+	    x_,
+	        y_,
+	        v_,
+	        // previous point
+	    first,
+	        clean;
+	    var clipStream = {
+	      point: point,
+	      lineStart: lineStart,
+	      lineEnd: lineEnd,
+	      polygonStart: polygonStart,
+	      polygonEnd: polygonEnd
+	    };
 
-	    intersection: function(obj) {
-	        if (!this.intersects(obj)) { return new geoExtent(); }
-	        return new geoExtent(
-	            [Math.max(obj[0][0], this[0][0]), Math.max(obj[0][1], this[0][1])],
-	            [Math.min(obj[1][0], this[1][0]), Math.min(obj[1][1], this[1][1])]
-	        );
-	    },
+	    function point(x, y) {
+	      if (visible(x, y)) activeStream.point(x, y);
+	    }
 
+	    function polygonInside() {
+	      var winding = 0;
 
-	    percentContainedIn: function(obj) {
-	        if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-	        var a1 = this.intersection(obj).area();
-	        var a2 = this.area();
+	      for (var i = 0, n = polygon.length; i < n; ++i) {
+	        for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
+	          a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
 
-	        if (a1 === Infinity || a2 === Infinity) {
-	            return 0;
-	        } else if (a1 === 0 || a2 === 0) {
-	            if (obj.contains(this)) {
-	                return 1;
-	            }
-	            return 0;
-	        } else {
-	            return a1 / a2;
+	          if (a1 <= y1) {
+	            if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding;
+	          } else {
+	            if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding;
+	          }
 	        }
-	    },
-
+	      }
 
-	    padByMeters: function(meters) {
-	        var dLat = geoMetersToLat(meters);
-	        var dLon = geoMetersToLon(meters, this.center()[1]);
-	        return geoExtent(
-	            [this[0][0] - dLon, this[0][1] - dLat],
-	            [this[1][0] + dLon, this[1][1] + dLat]
-	        );
-	    },
+	      return winding;
+	    } // Buffer geometry within a polygon and then clip it en masse.
 
 
-	    toParam: function() {
-	        return this.rectangle().join(',');
+	    function polygonStart() {
+	      activeStream = bufferStream, segments = [], polygon = [], clean = true;
 	    }
 
-	});
+	    function polygonEnd() {
+	      var startInside = polygonInside(),
+	          cleanInside = clean && startInside,
+	          visible = (segments = merge$4(segments)).length;
 
-	function d3_polygonArea(polygon) {
-	  var i = -1,
-	      n = polygon.length,
-	      a,
-	      b = polygon[n - 1],
-	      area = 0;
+	      if (cleanInside || visible) {
+	        stream.polygonStart();
 
-	  while (++i < n) {
-	    a = b;
-	    b = polygon[i];
-	    area += a[1] * b[0] - a[0] * b[1];
-	  }
+	        if (cleanInside) {
+	          stream.lineStart();
+	          interpolate(null, null, 1, stream);
+	          stream.lineEnd();
+	        }
 
-	  return area / 2;
-	}
+	        if (visible) {
+	          clipRejoin(segments, compareIntersection, startInside, interpolate, stream);
+	        }
 
-	function d3_polygonCentroid(polygon) {
-	  var i = -1,
-	      n = polygon.length,
-	      x = 0,
-	      y = 0,
-	      a,
-	      b = polygon[n - 1],
-	      c,
-	      k = 0;
+	        stream.polygonEnd();
+	      }
 
-	  while (++i < n) {
-	    a = b;
-	    b = polygon[i];
-	    k += c = a[0] * b[1] - b[0] * a[1];
-	    x += (a[0] + b[0]) * c;
-	    y += (a[1] + b[1]) * c;
-	  }
+	      activeStream = stream, segments = polygon = ring = null;
+	    }
 
-	  return k *= 3, [x / k, y / k];
-	}
+	    function lineStart() {
+	      clipStream.point = linePoint;
+	      if (polygon) polygon.push(ring = []);
+	      first = true;
+	      v_ = false;
+	      x_ = y_ = NaN;
+	    } // TODO rather than special-case polygons, simply handle them separately.
+	    // Ideally, coincident intersection points should be jittered to avoid
+	    // clipping issues.
 
-	// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
-	// the 3D cross product in a quadrant I Cartesian coordinate system (+x is
-	// right, +y is up). Returns a positive value if ABC is counter-clockwise,
-	// negative if clockwise, and zero if the points are collinear.
-	function cross(a, b, c) {
-	  return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
-	}
 
-	function lexicographicOrder(a, b) {
-	  return a[0] - b[0] || a[1] - b[1];
-	}
+	    function lineEnd() {
+	      if (segments) {
+	        linePoint(x__, y__);
+	        if (v__ && v_) bufferStream.rejoin();
+	        segments.push(bufferStream.result());
+	      }
 
-	// Computes the upper convex hull per the monotone chain algorithm.
-	// Assumes points.length >= 3, is sorted by x, unique in y.
-	// Returns an array of indices into points in left-to-right order.
-	function computeUpperHullIndexes(points) {
-	  var n = points.length,
-	      indexes = [0, 1],
-	      size = 2;
+	      clipStream.point = point;
+	      if (v_) activeStream.lineEnd();
+	    }
 
-	  for (var i = 2; i < n; ++i) {
-	    while (size > 1 && cross(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) { --size; }
-	    indexes[size++] = i;
-	  }
+	    function linePoint(x, y) {
+	      var v = visible(x, y);
+	      if (polygon) ring.push([x, y]);
 
-	  return indexes.slice(0, size); // remove popped points
-	}
+	      if (first) {
+	        x__ = x, y__ = y, v__ = v;
+	        first = false;
 
-	function d3_polygonHull(points) {
-	  if ((n = points.length) < 3) { return null; }
+	        if (v) {
+	          activeStream.lineStart();
+	          activeStream.point(x, y);
+	        }
+	      } else {
+	        if (v && v_) activeStream.point(x, y);else {
+	          var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
+	              b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];
 
-	  var i,
-	      n,
-	      sortedPoints = new Array(n),
-	      flippedPoints = new Array(n);
-
-	  for (i = 0; i < n; ++i) { sortedPoints[i] = [+points[i][0], +points[i][1], i]; }
-	  sortedPoints.sort(lexicographicOrder);
-	  for (i = 0; i < n; ++i) { flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]]; }
-
-	  var upperIndexes = computeUpperHullIndexes(sortedPoints),
-	      lowerIndexes = computeUpperHullIndexes(flippedPoints);
+	          if (clipLine(a, b, x0, y0, x1, y1)) {
+	            if (!v_) {
+	              activeStream.lineStart();
+	              activeStream.point(a[0], a[1]);
+	            }
 
-	  // Construct the hull polygon, removing possible duplicate endpoints.
-	  var skipLeft = lowerIndexes[0] === upperIndexes[0],
-	      skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
-	      hull = [];
+	            activeStream.point(b[0], b[1]);
+	            if (!v) activeStream.lineEnd();
+	            clean = false;
+	          } else if (v) {
+	            activeStream.lineStart();
+	            activeStream.point(x, y);
+	            clean = false;
+	          }
+	        }
+	      }
 
-	  // Add upper hull in right-to-l order.
-	  // Then add lower hull in left-to-right order.
-	  for (i = upperIndexes.length - 1; i >= 0; --i) { hull.push(points[sortedPoints[upperIndexes[i]][2]]); }
-	  for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) { hull.push(points[sortedPoints[lowerIndexes[i]][2]]); }
+	      x_ = x, y_ = y, v_ = v;
+	    }
 
-	  return hull;
+	    return clipStream;
+	  };
 	}
 
-	// vector equals
-	function geoVecEqual(a, b, epsilon) {
-	    if (epsilon) {
-	        return (Math.abs(a[0] - b[0]) <= epsilon) && (Math.abs(a[1] - b[1]) <= epsilon);
-	    } else {
-	        return (a[0] === b[0]) && (a[1] === b[1]);
-	    }
-	}
+	var lengthSum$1, lambda0, sinPhi0, cosPhi0;
+	var lengthStream$1 = {
+	  sphere: noop$1,
+	  point: noop$1,
+	  lineStart: lengthLineStart,
+	  lineEnd: noop$1,
+	  polygonStart: noop$1,
+	  polygonEnd: noop$1
+	};
 
-	// vector addition
-	function geoVecAdd(a, b) {
-	    return [ a[0] + b[0], a[1] + b[1] ];
+	function lengthLineStart() {
+	  lengthStream$1.point = lengthPointFirst$1;
+	  lengthStream$1.lineEnd = lengthLineEnd;
 	}
 
-	// vector subtraction
-	function geoVecSubtract(a, b) {
-	    return [ a[0] - b[0], a[1] - b[1] ];
+	function lengthLineEnd() {
+	  lengthStream$1.point = lengthStream$1.lineEnd = noop$1;
 	}
 
-	// vector scaling
-	function geoVecScale(a, mag) {
-	    return [ a[0] * mag, a[1] * mag ];
+	function lengthPointFirst$1(lambda, phi) {
+	  lambda *= radians, phi *= radians;
+	  lambda0 = lambda, sinPhi0 = sin(phi), cosPhi0 = cos(phi);
+	  lengthStream$1.point = lengthPoint$1;
 	}
 
-	// vector rounding (was: geoRoundCoordinates)
-	function geoVecFloor(a) {
-	    return [ Math.floor(a[0]), Math.floor(a[1]) ];
+	function lengthPoint$1(lambda, phi) {
+	  lambda *= radians, phi *= radians;
+	  var sinPhi = sin(phi),
+	      cosPhi = cos(phi),
+	      delta = abs$2(lambda - lambda0),
+	      cosDelta = cos(delta),
+	      sinDelta = sin(delta),
+	      x = cosPhi * sinDelta,
+	      y = cosPhi0 * sinPhi - sinPhi0 * cosPhi * cosDelta,
+	      z = sinPhi0 * sinPhi + cosPhi0 * cosPhi * cosDelta;
+	  lengthSum$1.add(atan2(sqrt(x * x + y * y), z));
+	  lambda0 = lambda, sinPhi0 = sinPhi, cosPhi0 = cosPhi;
 	}
 
-	// linear interpolation
-	function geoVecInterp(a, b, t) {
-	    return [
-	        a[0] + (b[0] - a[0]) * t,
-	        a[1] + (b[1] - a[1]) * t
-	    ];
+	function d3_geoLength (object) {
+	  lengthSum$1 = new Adder();
+	  d3_geoStream(object, lengthStream$1);
+	  return +lengthSum$1;
 	}
 
-	// http://jsperf.com/id-dist-optimization
-	function geoVecLength(a, b) {
-	    return Math.sqrt(geoVecLengthSquare(a,b));
-	}
+	var identity$4 = (function (x) {
+	  return x;
+	});
 
-	// length of vector raised to the power two
-	function geoVecLengthSquare(a, b) {
-	    b = b || [0, 0];
-	    var x = a[0] - b[0];
-	    var y = a[1] - b[1];
-	    return (x * x) + (y * y);
-	}
+	var areaSum = new Adder(),
+	    areaRingSum = new Adder(),
+	    x00$2,
+	    y00$2,
+	    x0$3,
+	    y0$3;
+	var areaStream = {
+	  point: noop$1,
+	  lineStart: noop$1,
+	  lineEnd: noop$1,
+	  polygonStart: function polygonStart() {
+	    areaStream.lineStart = areaRingStart;
+	    areaStream.lineEnd = areaRingEnd;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    areaStream.lineStart = areaStream.lineEnd = areaStream.point = noop$1;
+	    areaSum.add(abs$2(areaRingSum));
+	    areaRingSum = new Adder();
+	  },
+	  result: function result() {
+	    var area = areaSum / 2;
+	    areaSum = new Adder();
+	    return area;
+	  }
+	};
 
-	// get a unit vector
-	function geoVecNormalize(a) {
-	    var length = Math.sqrt((a[0] * a[0]) + (a[1] * a[1]));
-	    if (length !== 0) {
-	        return geoVecScale(a, 1 / length);
-	    }
-	    return [0, 0];
+	function areaRingStart() {
+	  areaStream.point = areaPointFirst;
 	}
 
-	// Return the counterclockwise angle in the range (-pi, pi)
-	// between the positive X axis and the line intersecting a and b.
-	function geoVecAngle(a, b) {
-	    return Math.atan2(b[1] - a[1], b[0] - a[0]);
+	function areaPointFirst(x, y) {
+	  areaStream.point = areaPoint;
+	  x00$2 = x0$3 = x, y00$2 = y0$3 = y;
 	}
 
-	// dot product
-	function geoVecDot(a, b, origin) {
-	    origin = origin || [0, 0];
-	    var p = geoVecSubtract(a, origin);
-	    var q = geoVecSubtract(b, origin);
-	    return (p[0]) * (q[0]) + (p[1]) * (q[1]);
+	function areaPoint(x, y) {
+	  areaRingSum.add(y0$3 * x - x0$3 * y);
+	  x0$3 = x, y0$3 = y;
 	}
 
-	// normalized dot product
-	function geoVecNormalizedDot(a, b, origin) {
-	    origin = origin || [0, 0];
-	    var p = geoVecNormalize(geoVecSubtract(a, origin));
-	    var q = geoVecNormalize(geoVecSubtract(b, origin));
-	    return geoVecDot(p, q);
+	function areaRingEnd() {
+	  areaPoint(x00$2, y00$2);
 	}
 
-	// 2D cross product of OA and OB vectors, returns magnitude of Z vector
-	// Returns a positive value, if OAB makes a counter-clockwise turn,
-	// negative for clockwise turn, and zero if the points are collinear.
-	function geoVecCross(a, b, origin) {
-	    origin = origin || [0, 0];
-	    var p = geoVecSubtract(a, origin);
-	    var q = geoVecSubtract(b, origin);
-	    return (p[0]) * (q[1]) - (p[1]) * (q[0]);
+	var x0$2 = Infinity,
+	    y0$2 = x0$2,
+	    x1 = -x0$2,
+	    y1 = x1;
+	var boundsStream = {
+	  point: boundsPoint,
+	  lineStart: noop$1,
+	  lineEnd: noop$1,
+	  polygonStart: noop$1,
+	  polygonEnd: noop$1,
+	  result: function result() {
+	    var bounds = [[x0$2, y0$2], [x1, y1]];
+	    x1 = y1 = -(y0$2 = x0$2 = Infinity);
+	    return bounds;
+	  }
+	};
+
+	function boundsPoint(x, y) {
+	  if (x < x0$2) x0$2 = x;
+	  if (x > x1) x1 = x;
+	  if (y < y0$2) y0$2 = y;
+	  if (y > y1) y1 = y;
 	}
 
+	var X0 = 0,
+	    Y0 = 0,
+	    Z0 = 0,
+	    X1 = 0,
+	    Y1 = 0,
+	    Z1 = 0,
+	    X2 = 0,
+	    Y2 = 0,
+	    Z2 = 0,
+	    x00$1,
+	    y00$1,
+	    x0$1,
+	    y0$1;
+	var centroidStream = {
+	  point: centroidPoint,
+	  lineStart: centroidLineStart,
+	  lineEnd: centroidLineEnd,
+	  polygonStart: function polygonStart() {
+	    centroidStream.lineStart = centroidRingStart;
+	    centroidStream.lineEnd = centroidRingEnd;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    centroidStream.point = centroidPoint;
+	    centroidStream.lineStart = centroidLineStart;
+	    centroidStream.lineEnd = centroidLineEnd;
+	  },
+	  result: function result() {
+	    var centroid = Z2 ? [X2 / Z2, Y2 / Z2] : Z1 ? [X1 / Z1, Y1 / Z1] : Z0 ? [X0 / Z0, Y0 / Z0] : [NaN, NaN];
+	    X0 = Y0 = Z0 = X1 = Y1 = Z1 = X2 = Y2 = Z2 = 0;
+	    return centroid;
+	  }
+	};
 
-	// find closest orthogonal projection of point onto points array
-	function geoVecProject(a, points) {
-	    var min = Infinity;
-	    var idx;
-	    var target;
-
-	    for (var i = 0; i < points.length - 1; i++) {
-	        var o = points[i];
-	        var s = geoVecSubtract(points[i + 1], o);
-	        var v = geoVecSubtract(a, o);
-	        var proj = geoVecDot(v, s) / geoVecDot(s, s);
-	        var p;
-
-	        if (proj < 0) {
-	            p = o;
-	        } else if (proj > 1) {
-	            p = points[i + 1];
-	        } else {
-	            p = [o[0] + proj * s[0], o[1] + proj * s[1]];
-	        }
+	function centroidPoint(x, y) {
+	  X0 += x;
+	  Y0 += y;
+	  ++Z0;
+	}
 
-	        var dist = geoVecLength(p, a);
-	        if (dist < min) {
-	            min = dist;
-	            idx = i + 1;
-	            target = p;
-	        }
-	    }
+	function centroidLineStart() {
+	  centroidStream.point = centroidPointFirstLine;
+	}
 
-	    if (idx !== undefined) {
-	        return { index: idx, distance: min, target: target };
-	    } else {
-	        return null;
-	    }
+	function centroidPointFirstLine(x, y) {
+	  centroidStream.point = centroidPointLine;
+	  centroidPoint(x0$1 = x, y0$1 = y);
 	}
 
-	// Return the counterclockwise angle in the range (-pi, pi)
-	// between the positive X axis and the line intersecting a and b.
-	function geoAngle(a, b, projection) {
-	    return geoVecAngle(projection(a.loc), projection(b.loc));
+	function centroidPointLine(x, y) {
+	  var dx = x - x0$1,
+	      dy = y - y0$1,
+	      z = sqrt(dx * dx + dy * dy);
+	  X1 += z * (x0$1 + x) / 2;
+	  Y1 += z * (y0$1 + y) / 2;
+	  Z1 += z;
+	  centroidPoint(x0$1 = x, y0$1 = y);
 	}
 
+	function centroidLineEnd() {
+	  centroidStream.point = centroidPoint;
+	}
 
-	function geoEdgeEqual(a, b) {
-	    return (a[0] === b[0] && a[1] === b[1]) ||
-	        (a[0] === b[1] && a[1] === b[0]);
+	function centroidRingStart() {
+	  centroidStream.point = centroidPointFirstRing;
 	}
 
+	function centroidRingEnd() {
+	  centroidPointRing(x00$1, y00$1);
+	}
 
-	// Rotate all points counterclockwise around a pivot point by given angle
-	function geoRotate(points, angle, around) {
-	    return points.map(function(point) {
-	        var radial = geoVecSubtract(point, around);
-	        return [
-	            radial[0] * Math.cos(angle) - radial[1] * Math.sin(angle) + around[0],
-	            radial[0] * Math.sin(angle) + radial[1] * Math.cos(angle) + around[1]
-	        ];
-	    });
+	function centroidPointFirstRing(x, y) {
+	  centroidStream.point = centroidPointRing;
+	  centroidPoint(x00$1 = x0$1 = x, y00$1 = y0$1 = y);
 	}
 
+	function centroidPointRing(x, y) {
+	  var dx = x - x0$1,
+	      dy = y - y0$1,
+	      z = sqrt(dx * dx + dy * dy);
+	  X1 += z * (x0$1 + x) / 2;
+	  Y1 += z * (y0$1 + y) / 2;
+	  Z1 += z;
+	  z = y0$1 * x - x0$1 * y;
+	  X2 += z * (x0$1 + x);
+	  Y2 += z * (y0$1 + y);
+	  Z2 += z * 3;
+	  centroidPoint(x0$1 = x, y0$1 = y);
+	}
 
-	// Choose the edge with the minimal distance from `point` to its orthogonal
-	// projection onto that edge, if such a projection exists, or the distance to
-	// the closest vertex on that edge. Returns an object with the `index` of the
-	// chosen edge, the chosen `loc` on that edge, and the `distance` to to it.
-	function geoChooseEdge(nodes, point, projection, activeID) {
-	    var dist = geoVecLength;
-	    var points = nodes.map(function(n) { return projection(n.loc); });
-	    var ids = nodes.map(function(n) { return n.id; });
-	    var min = Infinity;
-	    var idx;
-	    var loc;
-
-	    for (var i = 0; i < points.length - 1; i++) {
-	        if (ids[i] === activeID || ids[i + 1] === activeID) { continue; }
-
-	        var o = points[i];
-	        var s = geoVecSubtract(points[i + 1], o);
-	        var v = geoVecSubtract(point, o);
-	        var proj = geoVecDot(v, s) / geoVecDot(s, s);
-	        var p;
-
-	        if (proj < 0) {
-	            p = o;
-	        } else if (proj > 1) {
-	            p = points[i + 1];
-	        } else {
-	            p = [o[0] + proj * s[0], o[1] + proj * s[1]];
-	        }
+	function PathContext(context) {
+	  this._context = context;
+	}
+	PathContext.prototype = {
+	  _radius: 4.5,
+	  pointRadius: function pointRadius(_) {
+	    return this._radius = _, this;
+	  },
+	  polygonStart: function polygonStart() {
+	    this._line = 0;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    this._line = NaN;
+	  },
+	  lineStart: function lineStart() {
+	    this._point = 0;
+	  },
+	  lineEnd: function lineEnd() {
+	    if (this._line === 0) this._context.closePath();
+	    this._point = NaN;
+	  },
+	  point: function point(x, y) {
+	    switch (this._point) {
+	      case 0:
+	        {
+	          this._context.moveTo(x, y);
 
-	        var d = dist(p, point);
-	        if (d < min) {
-	            min = d;
-	            idx = i + 1;
-	            loc = projection.invert(p);
+	          this._point = 1;
+	          break;
 	        }
-	    }
-
-	    if (idx !== undefined) {
-	        return { index: idx, distance: min, loc: loc };
-	    } else {
-	        return null;
-	    }
-	}
 
+	      case 1:
+	        {
+	          this._context.lineTo(x, y);
 
-	// Test active (dragged or drawing) segments against inactive segments
-	// This is used to test e.g. multipolygon rings that cross
-	// `activeNodes` is the ring containing the activeID being dragged.
-	// `inactiveNodes` is the other ring to test against
-	function geoHasLineIntersections(activeNodes, inactiveNodes, activeID) {
-	    var actives = [];
-	    var inactives = [];
-	    var j, k, n1, n2, segment;
-
-	    // gather active segments (only segments in activeNodes that contain the activeID)
-	    for (j = 0; j < activeNodes.length - 1; j++) {
-	        n1 = activeNodes[j];
-	        n2 = activeNodes[j+1];
-	        segment = [n1.loc, n2.loc];
-	        if (n1.id === activeID || n2.id === activeID) {
-	            actives.push(segment);
-	        }
-	    }
-
-	    // gather inactive segments
-	    for (j = 0; j < inactiveNodes.length - 1; j++) {
-	        n1 = inactiveNodes[j];
-	        n2 = inactiveNodes[j+1];
-	        segment = [n1.loc, n2.loc];
-	        inactives.push(segment);
-	    }
-
-	    // test
-	    for (j = 0; j < actives.length; j++) {
-	        for (k = 0; k < inactives.length; k++) {
-	            var p = actives[j];
-	            var q = inactives[k];
-	            var hit = geoLineIntersection(p, q);
-	            if (hit) {
-	                return true;
-	            }
+	          break;
 	        }
-	    }
 
-	    return false;
-	}
+	      default:
+	        {
+	          this._context.moveTo(x + this._radius, y);
 
+	          this._context.arc(x, y, this._radius, 0, tau);
 
-	// Test active (dragged or drawing) segments against inactive segments
-	// This is used to test whether a way intersects with itself.
-	function geoHasSelfIntersections(nodes, activeID) {
-	    var actives = [];
-	    var inactives = [];
-	    var j, k;
-
-	    // group active and passive segments along the nodes
-	    for (j = 0; j < nodes.length - 1; j++) {
-	        var n1 = nodes[j];
-	        var n2 = nodes[j+1];
-	        var segment = [n1.loc, n2.loc];
-	        if (n1.id === activeID || n2.id === activeID) {
-	            actives.push(segment);
-	        } else {
-	            inactives.push(segment);
+	          break;
 	        }
 	    }
+	  },
+	  result: noop$1
+	};
 
-	    // test
-	    for (j = 0; j < actives.length; j++) {
-	        for (k = 0; k < inactives.length; k++) {
-	            var p = actives[j];
-	            var q = inactives[k];
-	            // skip if segments share an endpoint
-	            if (geoVecEqual(p[1], q[0]) || geoVecEqual(p[0], q[1]) ||
-	                geoVecEqual(p[0], q[0]) || geoVecEqual(p[1], q[1]) ) {
-	                continue;
-	            }
+	var lengthSum = new Adder(),
+	    lengthRing,
+	    x00,
+	    y00,
+	    x0,
+	    y0;
+	var lengthStream = {
+	  point: noop$1,
+	  lineStart: function lineStart() {
+	    lengthStream.point = lengthPointFirst;
+	  },
+	  lineEnd: function lineEnd() {
+	    if (lengthRing) lengthPoint(x00, y00);
+	    lengthStream.point = noop$1;
+	  },
+	  polygonStart: function polygonStart() {
+	    lengthRing = true;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    lengthRing = null;
+	  },
+	  result: function result() {
+	    var length = +lengthSum;
+	    lengthSum = new Adder();
+	    return length;
+	  }
+	};
 
-	            var hit = geoLineIntersection(p, q);
-	            if (hit) {
-	                var epsilon = 1e-8;
-	                // skip if the hit is at the segment's endpoint
-	                if (geoVecEqual(p[1], hit, epsilon) || geoVecEqual(p[0], hit, epsilon) ||
-	                    geoVecEqual(q[1], hit, epsilon) || geoVecEqual(q[0], hit, epsilon) ) {
-	                    continue;
-	                } else {
-	                    return true;
-	                }
-	            }
-	        }
-	    }
+	function lengthPointFirst(x, y) {
+	  lengthStream.point = lengthPoint;
+	  x00 = x0 = x, y00 = y0 = y;
+	}
 
-	    return false;
+	function lengthPoint(x, y) {
+	  x0 -= x, y0 -= y;
+	  lengthSum.add(sqrt(x0 * x0 + y0 * y0));
+	  x0 = x, y0 = y;
 	}
 
+	function PathString() {
+	  this._string = [];
+	}
+	PathString.prototype = {
+	  _radius: 4.5,
+	  _circle: circle(4.5),
+	  pointRadius: function pointRadius(_) {
+	    if ((_ = +_) !== this._radius) this._radius = _, this._circle = null;
+	    return this;
+	  },
+	  polygonStart: function polygonStart() {
+	    this._line = 0;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    this._line = NaN;
+	  },
+	  lineStart: function lineStart() {
+	    this._point = 0;
+	  },
+	  lineEnd: function lineEnd() {
+	    if (this._line === 0) this._string.push("Z");
+	    this._point = NaN;
+	  },
+	  point: function point(x, y) {
+	    switch (this._point) {
+	      case 0:
+	        {
+	          this._string.push("M", x, ",", y);
 
-	// Return the intersection point of 2 line segments.
-	// From https://github.com/pgkelley4/line-segments-intersect
-	// This uses the vector cross product approach described below:
-	//  http://stackoverflow.com/a/565282/786339
-	function geoLineIntersection(a, b) {
-	    var p = [a[0][0], a[0][1]];
-	    var p2 = [a[1][0], a[1][1]];
-	    var q = [b[0][0], b[0][1]];
-	    var q2 = [b[1][0], b[1][1]];
-	    var r = geoVecSubtract(p2, p);
-	    var s = geoVecSubtract(q2, q);
-	    var uNumerator = geoVecCross(geoVecSubtract(q, p), r);
-	    var denominator = geoVecCross(r, s);
+	          this._point = 1;
+	          break;
+	        }
 
-	    if (uNumerator && denominator) {
-	        var u = uNumerator / denominator;
-	        var t = geoVecCross(geoVecSubtract(q, p), s) / denominator;
+	      case 1:
+	        {
+	          this._string.push("L", x, ",", y);
 
-	        if ((t >= 0) && (t <= 1) && (u >= 0) && (u <= 1)) {
-	            return geoVecInterp(p, p2, t);
+	          break;
 	        }
-	    }
 
-	    return null;
-	}
+	      default:
+	        {
+	          if (this._circle == null) this._circle = circle(this._radius);
 
+	          this._string.push("M", x, ",", y, this._circle);
 
-	function geoPathIntersections(path1, path2) {
-	    var intersections = [];
-	    for (var i = 0; i < path1.length - 1; i++) {
-	        for (var j = 0; j < path2.length - 1; j++) {
-	            var a = [ path1[i], path1[i+1] ];
-	            var b = [ path2[j], path2[j+1] ];
-	            var hit = geoLineIntersection(a, b);
-	            if (hit) {
-	                intersections.push(hit);
-	            }
+	          break;
 	        }
 	    }
-	    return intersections;
-	}
+	  },
+	  result: function result() {
+	    if (this._string.length) {
+	      var result = this._string.join("");
 
-	function geoPathHasIntersections(path1, path2) {
-	    for (var i = 0; i < path1.length - 1; i++) {
-	        for (var j = 0; j < path2.length - 1; j++) {
-	            var a = [ path1[i], path1[i+1] ];
-	            var b = [ path2[j], path2[j+1] ];
-	            var hit = geoLineIntersection(a, b);
-	            if (hit) {
-	                return true;
-	            }
-	        }
+	      this._string = [];
+	      return result;
+	    } else {
+	      return null;
 	    }
-	    return false;
-	}
-
+	  }
+	};
 
-	// Return whether point is contained in polygon.
-	//
-	// `point` should be a 2-item array of coordinates.
-	// `polygon` should be an array of 2-item arrays of coordinates.
-	//
-	// From https://github.com/substack/point-in-polygon.
-	// ray-casting algorithm based on
-	// http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
-	//
-	function geoPointInPolygon(point, polygon) {
-	    var x = point[0];
-	    var y = point[1];
-	    var inside = false;
+	function circle(radius) {
+	  return "m0," + radius + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius + "z";
+	}
 
-	    for (var i = 0, j = polygon.length - 1; i < polygon.length; j = i++) {
-	        var xi = polygon[i][0];
-	        var yi = polygon[i][1];
-	        var xj = polygon[j][0];
-	        var yj = polygon[j][1];
+	function d3_geoPath (projection, context) {
+	  var pointRadius = 4.5,
+	      projectionStream,
+	      contextStream;
 
-	        var intersect = ((yi > y) !== (yj > y)) &&
-	            (x < (xj - xi) * (y - yi) / (yj - yi) + xi);
-	        if (intersect) { inside = !inside; }
+	  function path(object) {
+	    if (object) {
+	      if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
+	      d3_geoStream(object, projectionStream(contextStream));
 	    }
 
-	    return inside;
-	}
+	    return contextStream.result();
+	  }
 
+	  path.area = function (object) {
+	    d3_geoStream(object, projectionStream(areaStream));
+	    return areaStream.result();
+	  };
 
-	function geoPolygonContainsPolygon(outer, inner) {
-	    return inner.every(function(point) {
-	        return geoPointInPolygon(point, outer);
-	    });
-	}
+	  path.measure = function (object) {
+	    d3_geoStream(object, projectionStream(lengthStream));
+	    return lengthStream.result();
+	  };
 
+	  path.bounds = function (object) {
+	    d3_geoStream(object, projectionStream(boundsStream));
+	    return boundsStream.result();
+	  };
 
-	function geoPolygonIntersectsPolygon(outer, inner, checkSegments) {
-	    function testPoints(outer, inner) {
-	        return inner.some(function(point) {
-	            return geoPointInPolygon(point, outer);
-	        });
-	    }
+	  path.centroid = function (object) {
+	    d3_geoStream(object, projectionStream(centroidStream));
+	    return centroidStream.result();
+	  };
 
-	   return testPoints(outer, inner) || (!!checkSegments && geoPathHasIntersections(outer, inner));
-	}
+	  path.projection = function (_) {
+	    return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$4) : (projection = _).stream, path) : projection;
+	  };
 
+	  path.context = function (_) {
+	    if (!arguments.length) return context;
+	    contextStream = _ == null ? (context = null, new PathString()) : new PathContext(context = _);
+	    if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
+	    return path;
+	  };
 
-	// http://gis.stackexchange.com/questions/22895/finding-minimum-area-rectangle-for-given-points
-	// http://gis.stackexchange.com/questions/3739/generalisation-strategies-for-building-outlines/3756#3756
-	function geoGetSmallestSurroundingRectangle(points) {
-	    var hull = d3_polygonHull(points);
-	    var centroid = d3_polygonCentroid(hull);
-	    var minArea = Infinity;
-	    var ssrExtent = [];
-	    var ssrAngle = 0;
-	    var c1 = hull[0];
-
-	    for (var i = 0; i <= hull.length - 1; i++) {
-	        var c2 = (i === hull.length - 1) ? hull[0] : hull[i + 1];
-	        var angle = Math.atan2(c2[1] - c1[1], c2[0] - c1[0]);
-	        var poly = geoRotate(hull, -angle, centroid);
-	        var extent = poly.reduce(function(extent, point) {
-	            return extent.extend(geoExtent(point));
-	        }, geoExtent());
-
-	        var area = extent.area();
-	        if (area < minArea) {
-	            minArea = area;
-	            ssrExtent = extent;
-	            ssrAngle = angle;
-	        }
-	        c1 = c2;
-	    }
+	  path.pointRadius = function (_) {
+	    if (!arguments.length) return pointRadius;
+	    pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
+	    return path;
+	  };
 
-	    return {
-	        poly: geoRotate(ssrExtent.polygon(), ssrAngle, centroid),
-	        angle: ssrAngle
-	    };
+	  return path.projection(projection).context(context);
 	}
 
-
-	function geoPathLength(path) {
-	    var length = 0;
-	    for (var i = 0; i < path.length - 1; i++) {
-	        length += geoVecLength(path[i], path[i + 1]);
-	    }
-	    return length;
+	function d3_geoTransform (methods) {
+	  return {
+	    stream: transformer$1(methods)
+	  };
 	}
+	function transformer$1(methods) {
+	  return function (stream) {
+	    var s = new TransformStream();
 
-
-	// If the given point is at the edge of the padded viewport,
-	// return a vector that will nudge the viewport in that direction
-	function geoViewportEdge(point, dimensions) {
-	    var pad = [80, 20, 50, 20];   // top, right, bottom, left
-	    var x = 0;
-	    var y = 0;
-
-	    if (point[0] > dimensions[0] - pad[1])
-	        { x = -10; }
-	    if (point[0] < pad[3])
-	        { x = 10; }
-	    if (point[1] > dimensions[1] - pad[2])
-	        { y = -10; }
-	    if (point[1] < pad[0])
-	        { y = 10; }
-
-	    if (x || y) {
-	        return [x, y];
-	    } else {
-	        return null;
+	    for (var key in methods) {
+	      s[key] = methods[key];
 	    }
-	}
-
-	var noop$3 = {value: function() {}};
-
-	function dispatch() {
-	  var arguments$1 = arguments;
-
-	  for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
-	    if (!(t = arguments$1[i] + "") || (t in _) || /[\s.]/.test(t)) { throw new Error("illegal type: " + t); }
-	    _[t] = [];
-	  }
-	  return new Dispatch(_);
-	}
 
-	function Dispatch(_) {
-	  this._ = _;
-	}
-
-	function parseTypenames(typenames, types) {
-	  return typenames.trim().split(/^|\s+/).map(function(t) {
-	    var name = "", i = t.indexOf(".");
-	    if (i >= 0) { name = t.slice(i + 1), t = t.slice(0, i); }
-	    if (t && !types.hasOwnProperty(t)) { throw new Error("unknown type: " + t); }
-	    return {type: t, name: name};
-	  });
+	    s.stream = stream;
+	    return s;
+	  };
 	}
 
-	Dispatch.prototype = dispatch.prototype = {
-	  constructor: Dispatch,
-	  on: function(typename, callback) {
-	    var _ = this._,
-	        T = parseTypenames(typename + "", _),
-	        t,
-	        i = -1,
-	        n = T.length;
-
-	    // If no callback was specified, return the callback of the given type and name.
-	    if (arguments.length < 2) {
-	      while (++i < n) { if ((t = (typename = T[i]).type) && (t = get$1(_[t], typename.name))) { return t; } }
-	      return;
-	    }
-
-	    // If a type was specified, set the callback for the given type and name.
-	    // Otherwise, if a null callback was specified, remove callbacks of the given name.
-	    if (callback != null && typeof callback !== "function") { throw new Error("invalid callback: " + callback); }
-	    while (++i < n) {
-	      if (t = (typename = T[i]).type) { _[t] = set(_[t], typename.name, callback); }
-	      else if (callback == null) { for (t in _) { _[t] = set(_[t], typename.name, null); } }
-	    }
+	function TransformStream() {}
 
-	    return this;
+	TransformStream.prototype = {
+	  constructor: TransformStream,
+	  point: function point(x, y) {
+	    this.stream.point(x, y);
 	  },
-	  copy: function() {
-	    var copy = {}, _ = this._;
-	    for (var t in _) { copy[t] = _[t].slice(); }
-	    return new Dispatch(copy);
+	  sphere: function sphere() {
+	    this.stream.sphere();
 	  },
-	  call: function(type, that) {
-	    var arguments$1 = arguments;
-
-	    if ((n = arguments.length - 2) > 0) { for (var args = new Array(n), i = 0, n, t; i < n; ++i) { args[i] = arguments$1[i + 2]; } }
-	    if (!this._.hasOwnProperty(type)) { throw new Error("unknown type: " + type); }
-	    for (t = this._[type], i = 0, n = t.length; i < n; ++i) { t[i].value.apply(that, args); }
+	  lineStart: function lineStart() {
+	    this.stream.lineStart();
+	  },
+	  lineEnd: function lineEnd() {
+	    this.stream.lineEnd();
+	  },
+	  polygonStart: function polygonStart() {
+	    this.stream.polygonStart();
 	  },
-	  apply: function(type, that, args) {
-	    if (!this._.hasOwnProperty(type)) { throw new Error("unknown type: " + type); }
-	    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) { t[i].value.apply(that, args); }
+	  polygonEnd: function polygonEnd() {
+	    this.stream.polygonEnd();
 	  }
 	};
 
-	function get$1(type, name) {
-	  for (var i = 0, n = type.length, c; i < n; ++i) {
-	    if ((c = type[i]).name === name) {
-	      return c.value;
-	    }
-	  }
-	}
-
-	function set(type, name, callback) {
-	  for (var i = 0, n = type.length; i < n; ++i) {
-	    if (type[i].name === name) {
-	      type[i] = noop$3, type = type.slice(0, i).concat(type.slice(i + 1));
-	      break;
-	    }
-	  }
-	  if (callback != null) { type.push({name: name, value: callback}); }
-	  return type;
+	function fit(projection, fitBounds, object) {
+	  var clip = projection.clipExtent && projection.clipExtent();
+	  projection.scale(150).translate([0, 0]);
+	  if (clip != null) projection.clipExtent(null);
+	  d3_geoStream(object, projection.stream(boundsStream));
+	  fitBounds(boundsStream.result());
+	  if (clip != null) projection.clipExtent(clip);
+	  return projection;
 	}
 
-	var xhtml = "http://www.w3.org/1999/xhtml";
-
-	var namespaces = {
-	  svg: "http://www.w3.org/2000/svg",
-	  xhtml: xhtml,
-	  xlink: "http://www.w3.org/1999/xlink",
-	  xml: "http://www.w3.org/XML/1998/namespace",
-	  xmlns: "http://www.w3.org/2000/xmlns/"
-	};
-
-	function namespace(name) {
-	  var prefix = name += "", i = prefix.indexOf(":");
-	  if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") { name = name.slice(i + 1); }
-	  return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;
+	function fitExtent(projection, extent, object) {
+	  return fit(projection, function (b) {
+	    var w = extent[1][0] - extent[0][0],
+	        h = extent[1][1] - extent[0][1],
+	        k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
+	        x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
+	        y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;
+	    projection.scale(150 * k).translate([x, y]);
+	  }, object);
 	}
-
-	function creatorInherit(name) {
-	  return function() {
-	    var document = this.ownerDocument,
-	        uri = this.namespaceURI;
-	    return uri === xhtml && document.documentElement.namespaceURI === xhtml
-	        ? document.createElement(name)
-	        : document.createElementNS(uri, name);
-	  };
+	function fitSize(projection, size, object) {
+	  return fitExtent(projection, [[0, 0], size], object);
 	}
-
-	function creatorFixed(fullname) {
-	  return function() {
-	    return this.ownerDocument.createElementNS(fullname.space, fullname.local);
-	  };
+	function fitWidth(projection, width, object) {
+	  return fit(projection, function (b) {
+	    var w = +width,
+	        k = w / (b[1][0] - b[0][0]),
+	        x = (w - k * (b[1][0] + b[0][0])) / 2,
+	        y = -k * b[0][1];
+	    projection.scale(150 * k).translate([x, y]);
+	  }, object);
 	}
-
-	function creator(name) {
-	  var fullname = namespace(name);
-	  return (fullname.local
-	      ? creatorFixed
-	      : creatorInherit)(fullname);
+	function fitHeight(projection, height, object) {
+	  return fit(projection, function (b) {
+	    var h = +height,
+	        k = h / (b[1][1] - b[0][1]),
+	        x = -k * b[0][0],
+	        y = (h - k * (b[1][1] + b[0][1])) / 2;
+	    projection.scale(150 * k).translate([x, y]);
+	  }, object);
 	}
 
-	function none() {}
+	var maxDepth = 16,
+	    // maximum depth of subdivision
+	cosMinDistance = cos(30 * radians); // cos(minimum angular distance)
 
-	function selector(selector) {
-	  return selector == null ? none : function() {
-	    return this.querySelector(selector);
-	  };
+	function resample (project, delta2) {
+	  return +delta2 ? resample$1(project, delta2) : resampleNone(project);
 	}
 
-	function selection_select(select) {
-	  if (typeof select !== "function") { select = selector(select); }
-
-	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
-	      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
-	        if ("__data__" in node) { subnode.__data__ = node.__data__; }
-	        subgroup[i] = subnode;
-	      }
+	function resampleNone(project) {
+	  return transformer$1({
+	    point: function point(x, y) {
+	      x = project(x, y);
+	      this.stream.point(x[0], x[1]);
 	    }
-	  }
-
-	  return new Selection(subgroups, this._parents);
-	}
-
-	function empty() {
-	  return [];
+	  });
 	}
 
-	function selectorAll(selector) {
-	  return selector == null ? empty : function() {
-	    return this.querySelectorAll(selector);
-	  };
-	}
+	function resample$1(project, delta2) {
+	  function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
+	    var dx = x1 - x0,
+	        dy = y1 - y0,
+	        d2 = dx * dx + dy * dy;
 
-	function selection_selectAll(select) {
-	  if (typeof select !== "function") { select = selectorAll(select); }
+	    if (d2 > 4 * delta2 && depth--) {
+	      var a = a0 + a1,
+	          b = b0 + b1,
+	          c = c0 + c1,
+	          m = sqrt(a * a + b * b + c * c),
+	          phi2 = asin(c /= m),
+	          lambda2 = abs$2(abs$2(c) - 1) < epsilon$1 || abs$2(lambda0 - lambda1) < epsilon$1 ? (lambda0 + lambda1) / 2 : atan2(b, a),
+	          p = project(lambda2, phi2),
+	          x2 = p[0],
+	          y2 = p[1],
+	          dx2 = x2 - x0,
+	          dy2 = y2 - y0,
+	          dz = dy * dx2 - dx * dy2;
 
-	  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-	      if (node = group[i]) {
-	        subgroups.push(select.call(node, node.__data__, i, group));
-	        parents.push(node);
+	      if (dz * dz / d2 > delta2 // perpendicular projected distance
+	      || abs$2((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
+	      || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) {
+	        // angular distance
+	        resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
+	        stream.point(x2, y2);
+	        resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
 	      }
 	    }
 	  }
 
-	  return new Selection(subgroups, parents);
-	}
-
-	function matcher(selector) {
-	  return function() {
-	    return this.matches(selector);
-	  };
-	}
-
-	function selection_filter(match) {
-	  if (typeof match !== "function") { match = matcher(match); }
+	  return function (stream) {
+	    var lambda00, x00, y00, a00, b00, c00, // first point
+	    lambda0, x0, y0, a0, b0, c0; // previous point
 
-	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
-	      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
-	        subgroup.push(node);
+	    var resampleStream = {
+	      point: point,
+	      lineStart: lineStart,
+	      lineEnd: lineEnd,
+	      polygonStart: function polygonStart() {
+	        stream.polygonStart();
+	        resampleStream.lineStart = ringStart;
+	      },
+	      polygonEnd: function polygonEnd() {
+	        stream.polygonEnd();
+	        resampleStream.lineStart = lineStart;
 	      }
+	    };
+
+	    function point(x, y) {
+	      x = project(x, y);
+	      stream.point(x[0], x[1]);
 	    }
-	  }
 
-	  return new Selection(subgroups, this._parents);
-	}
+	    function lineStart() {
+	      x0 = NaN;
+	      resampleStream.point = linePoint;
+	      stream.lineStart();
+	    }
 
-	function sparse(update) {
-	  return new Array(update.length);
-	}
+	    function linePoint(lambda, phi) {
+	      var c = cartesian([lambda, phi]),
+	          p = project(lambda, phi);
+	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
+	      stream.point(x0, y0);
+	    }
 
-	function selection_enter() {
-	  return new Selection(this._enter || this._groups.map(sparse), this._parents);
-	}
-
-	function EnterNode(parent, datum) {
-	  this.ownerDocument = parent.ownerDocument;
-	  this.namespaceURI = parent.namespaceURI;
-	  this._next = null;
-	  this._parent = parent;
-	  this.__data__ = datum;
-	}
-
-	EnterNode.prototype = {
-	  constructor: EnterNode,
-	  appendChild: function(child) { return this._parent.insertBefore(child, this._next); },
-	  insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },
-	  querySelector: function(selector) { return this._parent.querySelector(selector); },
-	  querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }
-	};
-
-	function constant(x) {
-	  return function() {
-	    return x;
-	  };
-	}
-
-	var keyPrefix = "$"; // Protect against keys like “__proto__”.
-
-	function bindIndex(parent, group, enter, update, exit, data) {
-	  var i = 0,
-	      node,
-	      groupLength = group.length,
-	      dataLength = data.length;
-
-	  // Put any non-null nodes that fit into update.
-	  // Put any null nodes into enter.
-	  // Put any remaining data into enter.
-	  for (; i < dataLength; ++i) {
-	    if (node = group[i]) {
-	      node.__data__ = data[i];
-	      update[i] = node;
-	    } else {
-	      enter[i] = new EnterNode(parent, data[i]);
+	    function lineEnd() {
+	      resampleStream.point = point;
+	      stream.lineEnd();
 	    }
-	  }
 
-	  // Put any non-null nodes that don’t fit into exit.
-	  for (; i < groupLength; ++i) {
-	    if (node = group[i]) {
-	      exit[i] = node;
+	    function ringStart() {
+	      lineStart();
+	      resampleStream.point = ringPoint;
+	      resampleStream.lineEnd = ringEnd;
 	    }
-	  }
-	}
-
-	function bindKey(parent, group, enter, update, exit, data, key) {
-	  var i,
-	      node,
-	      nodeByKeyValue = {},
-	      groupLength = group.length,
-	      dataLength = data.length,
-	      keyValues = new Array(groupLength),
-	      keyValue;
 
-	  // Compute the key for each node.
-	  // If multiple nodes have the same key, the duplicates are added to exit.
-	  for (i = 0; i < groupLength; ++i) {
-	    if (node = group[i]) {
-	      keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);
-	      if (keyValue in nodeByKeyValue) {
-	        exit[i] = node;
-	      } else {
-	        nodeByKeyValue[keyValue] = node;
-	      }
+	    function ringPoint(lambda, phi) {
+	      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
+	      resampleStream.point = linePoint;
 	    }
-	  }
 
-	  // Compute the key for each datum.
-	  // If there a node associated with this key, join and add it to update.
-	  // If there is not (or the key is a duplicate), add it to enter.
-	  for (i = 0; i < dataLength; ++i) {
-	    keyValue = keyPrefix + key.call(parent, data[i], i, data);
-	    if (node = nodeByKeyValue[keyValue]) {
-	      update[i] = node;
-	      node.__data__ = data[i];
-	      nodeByKeyValue[keyValue] = null;
-	    } else {
-	      enter[i] = new EnterNode(parent, data[i]);
+	    function ringEnd() {
+	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
+	      resampleStream.lineEnd = lineEnd;
+	      lineEnd();
 	    }
-	  }
 
-	  // Add any remaining nodes that were not bound to data to exit.
-	  for (i = 0; i < groupLength; ++i) {
-	    if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {
-	      exit[i] = node;
-	    }
-	  }
+	    return resampleStream;
+	  };
 	}
 
-	function selection_data(value, key) {
-	  if (!value) {
-	    data = new Array(this.size()), j = -1;
-	    this.each(function(d) { data[++j] = d; });
-	    return data;
+	var transformRadians = transformer$1({
+	  point: function point(x, y) {
+	    this.stream.point(x * radians, y * radians);
 	  }
+	});
 
-	  var bind = key ? bindKey : bindIndex,
-	      parents = this._parents,
-	      groups = this._groups;
-
-	  if (typeof value !== "function") { value = constant(value); }
-
-	  for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
-	    var parent = parents[j],
-	        group = groups[j],
-	        groupLength = group.length,
-	        data = value.call(parent, parent && parent.__data__, j, parents),
-	        dataLength = data.length,
-	        enterGroup = enter[j] = new Array(dataLength),
-	        updateGroup = update[j] = new Array(dataLength),
-	        exitGroup = exit[j] = new Array(groupLength);
-
-	    bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);
-
-	    // Now connect the enter nodes to their following update node, such that
-	    // appendChild can insert the materialized enter node before this node,
-	    // rather than at the end of the parent node.
-	    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
-	      if (previous = enterGroup[i0]) {
-	        if (i0 >= i1) { i1 = i0 + 1; }
-	        while (!(next = updateGroup[i1]) && ++i1 < dataLength){ }
-	        previous._next = next || null;
-	      }
+	function transformRotate(rotate) {
+	  return transformer$1({
+	    point: function point(x, y) {
+	      var r = rotate(x, y);
+	      return this.stream.point(r[0], r[1]);
 	    }
-	  }
-
-	  update = new Selection(update, parents);
-	  update._enter = enter;
-	  update._exit = exit;
-	  return update;
-	}
-
-	function selection_exit() {
-	  return new Selection(this._exit || this._groups.map(sparse), this._parents);
-	}
-
-	function selection_join(onenter, onupdate, onexit) {
-	  var enter = this.enter(), update = this, exit = this.exit();
-	  enter = typeof onenter === "function" ? onenter(enter) : enter.append(onenter + "");
-	  if (onupdate != null) { update = onupdate(update); }
-	  if (onexit == null) { exit.remove(); } else { onexit(exit); }
-	  return enter && update ? enter.merge(update).order() : update;
+	  });
 	}
 
-	function selection_merge(selection) {
-
-	  for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
-	    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
-	      if (node = group0[i] || group1[i]) {
-	        merge[i] = node;
-	      }
-	    }
+	function scaleTranslate(k, dx, dy, sx, sy) {
+	  function transform(x, y) {
+	    x *= sx;
+	    y *= sy;
+	    return [dx + k * x, dy - k * y];
 	  }
 
-	  for (; j < m0; ++j) {
-	    merges[j] = groups0[j];
-	  }
+	  transform.invert = function (x, y) {
+	    return [(x - dx) / k * sx, (dy - y) / k * sy];
+	  };
 
-	  return new Selection(merges, this._parents);
+	  return transform;
 	}
 
-	function selection_order() {
+	function scaleTranslateRotate(k, dx, dy, sx, sy, alpha) {
+	  if (!alpha) return scaleTranslate(k, dx, dy, sx, sy);
+	  var cosAlpha = cos(alpha),
+	      sinAlpha = sin(alpha),
+	      a = cosAlpha * k,
+	      b = sinAlpha * k,
+	      ai = cosAlpha / k,
+	      bi = sinAlpha / k,
+	      ci = (sinAlpha * dy - cosAlpha * dx) / k,
+	      fi = (sinAlpha * dx + cosAlpha * dy) / k;
 
-	  for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
-	    for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
-	      if (node = group[i]) {
-	        if (next && node.compareDocumentPosition(next) ^ 4) { next.parentNode.insertBefore(node, next); }
-	        next = node;
-	      }
-	    }
+	  function transform(x, y) {
+	    x *= sx;
+	    y *= sy;
+	    return [a * x - b * y + dx, dy - b * x - a * y];
 	  }
 
-	  return this;
+	  transform.invert = function (x, y) {
+	    return [sx * (ai * x - bi * y + ci), sy * (fi - bi * x - ai * y)];
+	  };
+
+	  return transform;
 	}
 
-	function selection_sort(compare) {
-	  if (!compare) { compare = ascending; }
+	function projection(project) {
+	  return projectionMutator(function () {
+	    return project;
+	  })();
+	}
+	function projectionMutator(projectAt) {
+	  var project,
+	      k = 150,
+	      // scale
+	  x = 480,
+	      y = 250,
+	      // translate
+	  lambda = 0,
+	      phi = 0,
+	      // center
+	  deltaLambda = 0,
+	      deltaPhi = 0,
+	      deltaGamma = 0,
+	      rotate,
+	      // pre-rotate
+	  alpha = 0,
+	      // post-rotate angle
+	  sx = 1,
+	      // reflectX
+	  sy = 1,
+	      // reflectX
+	  theta = null,
+	      preclip = clipAntimeridian,
+	      // pre-clip angle
+	  x0 = null,
+	      y0,
+	      x1,
+	      y1,
+	      postclip = identity$4,
+	      // post-clip extent
+	  delta2 = 0.5,
+	      // precision
+	  projectResample,
+	      projectTransform,
+	      projectRotateTransform,
+	      cache,
+	      cacheStream;
 
-	  function compareNode(a, b) {
-	    return a && b ? compare(a.__data__, b.__data__) : !a - !b;
+	  function projection(point) {
+	    return projectRotateTransform(point[0] * radians, point[1] * radians);
 	  }
 
-	  for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
-	      if (node = group[i]) {
-	        sortgroup[i] = node;
-	      }
-	    }
-	    sortgroup.sort(compareNode);
+	  function invert(point) {
+	    point = projectRotateTransform.invert(point[0], point[1]);
+	    return point && [point[0] * degrees$1, point[1] * degrees$1];
 	  }
 
-	  return new Selection(sortgroups, this._parents).order();
-	}
-
-	function ascending(a, b) {
-	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
-	}
-
-	function selection_call() {
-	  var callback = arguments[0];
-	  arguments[0] = this;
-	  callback.apply(null, arguments);
-	  return this;
-	}
+	  projection.stream = function (stream) {
+	    return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
+	  };
 
-	function selection_nodes() {
-	  var nodes = new Array(this.size()), i = -1;
-	  this.each(function() { nodes[++i] = this; });
-	  return nodes;
-	}
+	  projection.preclip = function (_) {
+	    return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
+	  };
 
-	function selection_node() {
+	  projection.postclip = function (_) {
+	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
+	  };
 
-	  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
-	    for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
-	      var node = group[i];
-	      if (node) { return node; }
-	    }
-	  }
+	  projection.clipAngle = function (_) {
+	    return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1;
+	  };
 
-	  return null;
-	}
+	  projection.clipExtent = function (_) {
+	    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+	  };
 
-	function selection_size() {
-	  var size = 0;
-	  this.each(function() { ++size; });
-	  return size;
-	}
+	  projection.scale = function (_) {
+	    return arguments.length ? (k = +_, recenter()) : k;
+	  };
 
-	function selection_empty() {
-	  return !this.node();
-	}
+	  projection.translate = function (_) {
+	    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
+	  };
 
-	function selection_each(callback) {
+	  projection.center = function (_) {
+	    return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1];
+	  };
 
-	  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
-	    for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
-	      if (node = group[i]) { callback.call(node, node.__data__, i, group); }
-	    }
-	  }
+	  projection.rotate = function (_) {
+	    return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1];
+	  };
 
-	  return this;
-	}
+	  projection.angle = function (_) {
+	    return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees$1;
+	  };
 
-	function attrRemove(name) {
-	  return function() {
-	    this.removeAttribute(name);
+	  projection.reflectX = function (_) {
+	    return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;
 	  };
-	}
 
-	function attrRemoveNS(fullname) {
-	  return function() {
-	    this.removeAttributeNS(fullname.space, fullname.local);
+	  projection.reflectY = function (_) {
+	    return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;
 	  };
-	}
 
-	function attrConstant(name, value) {
-	  return function() {
-	    this.setAttribute(name, value);
+	  projection.precision = function (_) {
+	    return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
 	  };
-	}
 
-	function attrConstantNS(fullname, value) {
-	  return function() {
-	    this.setAttributeNS(fullname.space, fullname.local, value);
+	  projection.fitExtent = function (extent, object) {
+	    return fitExtent(projection, extent, object);
 	  };
-	}
 
-	function attrFunction(name, value) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    if (v == null) { this.removeAttribute(name); }
-	    else { this.setAttribute(name, v); }
+	  projection.fitSize = function (size, object) {
+	    return fitSize(projection, size, object);
 	  };
-	}
 
-	function attrFunctionNS(fullname, value) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    if (v == null) { this.removeAttributeNS(fullname.space, fullname.local); }
-	    else { this.setAttributeNS(fullname.space, fullname.local, v); }
+	  projection.fitWidth = function (width, object) {
+	    return fitWidth(projection, width, object);
 	  };
-	}
 
-	function selection_attr(name, value) {
-	  var fullname = namespace(name);
+	  projection.fitHeight = function (height, object) {
+	    return fitHeight(projection, height, object);
+	  };
 
-	  if (arguments.length < 2) {
-	    var node = this.node();
-	    return fullname.local
-	        ? node.getAttributeNS(fullname.space, fullname.local)
-	        : node.getAttribute(fullname);
+	  function recenter() {
+	    var center = scaleTranslateRotate(k, 0, 0, sx, sy, alpha).apply(null, project(lambda, phi)),
+	        transform = scaleTranslateRotate(k, x - center[0], y - center[1], sx, sy, alpha);
+	    rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);
+	    projectTransform = compose(project, transform);
+	    projectRotateTransform = compose(rotate, projectTransform);
+	    projectResample = resample(projectTransform, delta2);
+	    return reset();
 	  }
 
-	  return this.each((value == null
-	      ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function"
-	      ? (fullname.local ? attrFunctionNS : attrFunction)
-	      : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));
-	}
-
-	function defaultView(node) {
-	  return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
-	      || (node.document && node) // node is a Window
-	      || node.defaultView; // node is a Document
-	}
+	  function reset() {
+	    cache = cacheStream = null;
+	    return projection;
+	  }
 
-	function styleRemove(name) {
-	  return function() {
-	    this.style.removeProperty(name);
+	  return function () {
+	    project = projectAt.apply(this, arguments);
+	    projection.invert = project.invert && invert;
+	    return recenter();
 	  };
 	}
 
-	function styleConstant(name, value, priority) {
-	  return function() {
-	    this.style.setProperty(name, value, priority);
-	  };
+	function mercatorRaw(lambda, phi) {
+	  return [lambda, log$1(tan((halfPi + phi) / 2))];
 	}
 
-	function styleFunction(name, value, priority) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    if (v == null) { this.style.removeProperty(name); }
-	    else { this.style.setProperty(name, v, priority); }
-	  };
-	}
+	mercatorRaw.invert = function (x, y) {
+	  return [x, 2 * atan(exp$2(y)) - halfPi];
+	};
 
-	function selection_style(name, value, priority) {
-	  return arguments.length > 1
-	      ? this.each((value == null
-	            ? styleRemove : typeof value === "function"
-	            ? styleFunction
-	            : styleConstant)(name, value, priority == null ? "" : priority))
-	      : styleValue(this.node(), name);
+	function mercator () {
+	  return mercatorProjection(mercatorRaw).scale(961 / tau);
 	}
+	function mercatorProjection(project) {
+	  var m = projection(project),
+	      center = m.center,
+	      scale = m.scale,
+	      translate = m.translate,
+	      clipExtent = m.clipExtent,
+	      x0 = null,
+	      y0,
+	      x1,
+	      y1; // clip extent
 
-	function styleValue(node, name) {
-	  return node.style.getPropertyValue(name)
-	      || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
-	}
+	  m.scale = function (_) {
+	    return arguments.length ? (scale(_), reclip()) : scale();
+	  };
 
-	function propertyRemove(name) {
-	  return function() {
-	    delete this[name];
+	  m.translate = function (_) {
+	    return arguments.length ? (translate(_), reclip()) : translate();
 	  };
-	}
 
-	function propertyConstant(name, value) {
-	  return function() {
-	    this[name] = value;
+	  m.center = function (_) {
+	    return arguments.length ? (center(_), reclip()) : center();
 	  };
-	}
 
-	function propertyFunction(name, value) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    if (v == null) { delete this[name]; }
-	    else { this[name] = v; }
+	  m.clipExtent = function (_) {
+	    return arguments.length ? (_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
 	  };
-	}
 
-	function selection_property(name, value) {
-	  return arguments.length > 1
-	      ? this.each((value == null
-	          ? propertyRemove : typeof value === "function"
-	          ? propertyFunction
-	          : propertyConstant)(name, value))
-	      : this.node()[name];
-	}
+	  function reclip() {
+	    var k = pi * scale(),
+	        t = m(rotation(m.rotate()).invert([0, 0]));
+	    return clipExtent(x0 == null ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]] : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);
+	  }
 
-	function classArray(string) {
-	  return string.trim().split(/^|\s+/);
+	  return reclip();
 	}
 
-	function classList(node) {
-	  return node.classList || new ClassList(node);
-	}
+	function d3_geoIdentity () {
+	  var k = 1,
+	      tx = 0,
+	      ty = 0,
+	      sx = 1,
+	      sy = 1,
+	      // scale, translate and reflect
+	  alpha = 0,
+	      ca,
+	      sa,
+	      // angle
+	  x0 = null,
+	      y0,
+	      x1,
+	      y1,
+	      // clip extent
+	  kx = 1,
+	      ky = 1,
+	      transform = transformer$1({
+	    point: function point(x, y) {
+	      var p = projection([x, y]);
+	      this.stream.point(p[0], p[1]);
+	    }
+	  }),
+	      postclip = identity$4,
+	      cache,
+	      cacheStream;
 
-	function ClassList(node) {
-	  this._node = node;
-	  this._names = classArray(node.getAttribute("class") || "");
-	}
+	  function reset() {
+	    kx = k * sx;
+	    ky = k * sy;
+	    cache = cacheStream = null;
+	    return projection;
+	  }
 
-	ClassList.prototype = {
-	  add: function(name) {
-	    var i = this._names.indexOf(name);
-	    if (i < 0) {
-	      this._names.push(name);
-	      this._node.setAttribute("class", this._names.join(" "));
-	    }
-	  },
-	  remove: function(name) {
-	    var i = this._names.indexOf(name);
-	    if (i >= 0) {
-	      this._names.splice(i, 1);
-	      this._node.setAttribute("class", this._names.join(" "));
+	  function projection(p) {
+	    var x = p[0] * kx,
+	        y = p[1] * ky;
+
+	    if (alpha) {
+	      var t = y * ca - x * sa;
+	      x = x * ca + y * sa;
+	      y = t;
 	    }
-	  },
-	  contains: function(name) {
-	    return this._names.indexOf(name) >= 0;
+
+	    return [x + tx, y + ty];
 	  }
-	};
 
-	function classedAdd(node, names) {
-	  var list = classList(node), i = -1, n = names.length;
-	  while (++i < n) { list.add(names[i]); }
-	}
+	  projection.invert = function (p) {
+	    var x = p[0] - tx,
+	        y = p[1] - ty;
 
-	function classedRemove(node, names) {
-	  var list = classList(node), i = -1, n = names.length;
-	  while (++i < n) { list.remove(names[i]); }
-	}
+	    if (alpha) {
+	      var t = y * ca + x * sa;
+	      x = x * ca - y * sa;
+	      y = t;
+	    }
 
-	function classedTrue(names) {
-	  return function() {
-	    classedAdd(this, names);
+	    return [x / kx, y / ky];
 	  };
-	}
 
-	function classedFalse(names) {
-	  return function() {
-	    classedRemove(this, names);
+	  projection.stream = function (stream) {
+	    return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));
 	  };
-	}
 
-	function classedFunction(names, value) {
-	  return function() {
-	    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
+	  projection.postclip = function (_) {
+	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
 	  };
-	}
-
-	function selection_classed(name, value) {
-	  var names = classArray(name + "");
 
-	  if (arguments.length < 2) {
-	    var list = classList(this.node()), i = -1, n = names.length;
-	    while (++i < n) { if (!list.contains(names[i])) { return false; } }
-	    return true;
-	  }
+	  projection.clipExtent = function (_) {
+	    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+	  };
 
-	  return this.each((typeof value === "function"
-	      ? classedFunction : value
-	      ? classedTrue
-	      : classedFalse)(names, value));
-	}
+	  projection.scale = function (_) {
+	    return arguments.length ? (k = +_, reset()) : k;
+	  };
 
-	function textRemove() {
-	  this.textContent = "";
-	}
+	  projection.translate = function (_) {
+	    return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];
+	  };
 
-	function textConstant(value) {
-	  return function() {
-	    this.textContent = value;
+	  projection.angle = function (_) {
+	    return arguments.length ? (alpha = _ % 360 * radians, sa = sin(alpha), ca = cos(alpha), reset()) : alpha * degrees$1;
 	  };
-	}
 
-	function textFunction(value) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    this.textContent = v == null ? "" : v;
+	  projection.reflectX = function (_) {
+	    return arguments.length ? (sx = _ ? -1 : 1, reset()) : sx < 0;
 	  };
-	}
 
-	function selection_text(value) {
-	  return arguments.length
-	      ? this.each(value == null
-	          ? textRemove : (typeof value === "function"
-	          ? textFunction
-	          : textConstant)(value))
-	      : this.node().textContent;
-	}
+	  projection.reflectY = function (_) {
+	    return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;
+	  };
 
-	function htmlRemove() {
-	  this.innerHTML = "";
-	}
+	  projection.fitExtent = function (extent, object) {
+	    return fitExtent(projection, extent, object);
+	  };
 
-	function htmlConstant(value) {
-	  return function() {
-	    this.innerHTML = value;
+	  projection.fitSize = function (size, object) {
+	    return fitSize(projection, size, object);
 	  };
-	}
 
-	function htmlFunction(value) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    this.innerHTML = v == null ? "" : v;
+	  projection.fitWidth = function (width, object) {
+	    return fitWidth(projection, width, object);
 	  };
-	}
 
-	function selection_html(value) {
-	  return arguments.length
-	      ? this.each(value == null
-	          ? htmlRemove : (typeof value === "function"
-	          ? htmlFunction
-	          : htmlConstant)(value))
-	      : this.node().innerHTML;
-	}
+	  projection.fitHeight = function (height, object) {
+	    return fitHeight(projection, height, object);
+	  };
 
-	function raise() {
-	  if (this.nextSibling) { this.parentNode.appendChild(this); }
+	  return projection;
 	}
 
-	function selection_raise() {
-	  return this.each(raise);
+	// constants
+	var TAU = 2 * Math.PI;
+	var EQUATORIAL_RADIUS = 6356752.314245179;
+	var POLAR_RADIUS = 6378137.0;
+	function geoLatToMeters(dLat) {
+	  return dLat * (TAU * POLAR_RADIUS / 360);
 	}
-
-	function lower() {
-	  if (this.previousSibling) { this.parentNode.insertBefore(this, this.parentNode.firstChild); }
+	function geoLonToMeters(dLon, atLat) {
+	  return Math.abs(atLat) >= 90 ? 0 : dLon * (TAU * EQUATORIAL_RADIUS / 360) * Math.abs(Math.cos(atLat * (Math.PI / 180)));
 	}
-
-	function selection_lower() {
-	  return this.each(lower);
+	function geoMetersToLat(m) {
+	  return m / (TAU * POLAR_RADIUS / 360);
 	}
-
-	function selection_append(name) {
-	  var create = typeof name === "function" ? name : creator(name);
-	  return this.select(function() {
-	    return this.appendChild(create.apply(this, arguments));
-	  });
+	function geoMetersToLon(m, atLat) {
+	  return Math.abs(atLat) >= 90 ? 0 : m / (TAU * EQUATORIAL_RADIUS / 360) / Math.abs(Math.cos(atLat * (Math.PI / 180)));
 	}
-
-	function constantNull() {
-	  return null;
+	function geoMetersToOffset(meters, tileSize) {
+	  tileSize = tileSize || 256;
+	  return [meters[0] * tileSize / (TAU * EQUATORIAL_RADIUS), -meters[1] * tileSize / (TAU * POLAR_RADIUS)];
 	}
+	function geoOffsetToMeters(offset, tileSize) {
+	  tileSize = tileSize || 256;
+	  return [offset[0] * TAU * EQUATORIAL_RADIUS / tileSize, -offset[1] * TAU * POLAR_RADIUS / tileSize];
+	} // Equirectangular approximation of spherical distances on Earth
 
-	function selection_insert(name, before) {
-	  var create = typeof name === "function" ? name : creator(name),
-	      select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
-	  return this.select(function() {
-	    return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
-	  });
-	}
+	function geoSphericalDistance(a, b) {
+	  var x = geoLonToMeters(a[0] - b[0], (a[1] + b[1]) / 2);
+	  var y = geoLatToMeters(a[1] - b[1]);
+	  return Math.sqrt(x * x + y * y);
+	} // scale to zoom
 
-	function remove() {
-	  var parent = this.parentNode;
-	  if (parent) { parent.removeChild(this); }
-	}
+	function geoScaleToZoom(k, tileSize) {
+	  tileSize = tileSize || 256;
+	  var log2ts = Math.log(tileSize) * Math.LOG2E;
+	  return Math.log(k * TAU) / Math.LN2 - log2ts;
+	} // zoom to scale
 
-	function selection_remove() {
-	  return this.each(remove);
-	}
+	function geoZoomToScale(z, tileSize) {
+	  tileSize = tileSize || 256;
+	  return tileSize * Math.pow(2, z) / TAU;
+	} // returns info about the node from `nodes` closest to the given `point`
 
-	function selection_cloneShallow() {
-	  var clone = this.cloneNode(false), parent = this.parentNode;
-	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
-	}
+	function geoSphericalClosestNode(nodes, point) {
+	  var minDistance = Infinity,
+	      distance;
+	  var indexOfMin;
 
-	function selection_cloneDeep() {
-	  var clone = this.cloneNode(true), parent = this.parentNode;
-	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
-	}
+	  for (var i in nodes) {
+	    distance = geoSphericalDistance(nodes[i].loc, point);
 
-	function selection_clone(deep) {
-	  return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
-	}
+	    if (distance < minDistance) {
+	      minDistance = distance;
+	      indexOfMin = i;
+	    }
+	  }
 
-	function selection_datum(value) {
-	  return arguments.length
-	      ? this.property("__data__", value)
-	      : this.node().__data__;
+	  if (indexOfMin !== undefined) {
+	    return {
+	      index: indexOfMin,
+	      distance: minDistance,
+	      node: nodes[indexOfMin]
+	    };
+	  } else {
+	    return null;
+	  }
 	}
 
-	var filterEvents = {};
-
-	var event = null;
-
-	if (typeof document !== "undefined") {
-	  var element = document.documentElement;
-	  if (!("onmouseenter" in element)) {
-	    filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"};
+	function geoExtent(min, max) {
+	  if (!(this instanceof geoExtent)) {
+	    return new geoExtent(min, max);
+	  } else if (min instanceof geoExtent) {
+	    return min;
+	  } else if (min && min.length === 2 && min[0].length === 2 && min[1].length === 2) {
+	    this[0] = min[0];
+	    this[1] = min[1];
+	  } else {
+	    this[0] = min || [Infinity, Infinity];
+	    this[1] = max || min || [-Infinity, -Infinity];
 	  }
 	}
+	geoExtent.prototype = new Array(2);
+	Object.assign(geoExtent.prototype, {
+	  equals: function equals(obj) {
+	    return this[0][0] === obj[0][0] && this[0][1] === obj[0][1] && this[1][0] === obj[1][0] && this[1][1] === obj[1][1];
+	  },
+	  extend: function extend(obj) {
+	    if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+	    return geoExtent([Math.min(obj[0][0], this[0][0]), Math.min(obj[0][1], this[0][1])], [Math.max(obj[1][0], this[1][0]), Math.max(obj[1][1], this[1][1])]);
+	  },
+	  _extend: function _extend(extent) {
+	    this[0][0] = Math.min(extent[0][0], this[0][0]);
+	    this[0][1] = Math.min(extent[0][1], this[0][1]);
+	    this[1][0] = Math.max(extent[1][0], this[1][0]);
+	    this[1][1] = Math.max(extent[1][1], this[1][1]);
+	  },
+	  area: function area() {
+	    return Math.abs((this[1][0] - this[0][0]) * (this[1][1] - this[0][1]));
+	  },
+	  center: function center() {
+	    return [(this[0][0] + this[1][0]) / 2, (this[0][1] + this[1][1]) / 2];
+	  },
+	  rectangle: function rectangle() {
+	    return [this[0][0], this[0][1], this[1][0], this[1][1]];
+	  },
+	  bbox: function bbox() {
+	    return {
+	      minX: this[0][0],
+	      minY: this[0][1],
+	      maxX: this[1][0],
+	      maxY: this[1][1]
+	    };
+	  },
+	  polygon: function polygon() {
+	    return [[this[0][0], this[0][1]], [this[0][0], this[1][1]], [this[1][0], this[1][1]], [this[1][0], this[0][1]], [this[0][0], this[0][1]]];
+	  },
+	  contains: function contains(obj) {
+	    if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+	    return obj[0][0] >= this[0][0] && obj[0][1] >= this[0][1] && obj[1][0] <= this[1][0] && obj[1][1] <= this[1][1];
+	  },
+	  intersects: function intersects(obj) {
+	    if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+	    return obj[0][0] <= this[1][0] && obj[0][1] <= this[1][1] && obj[1][0] >= this[0][0] && obj[1][1] >= this[0][1];
+	  },
+	  intersection: function intersection(obj) {
+	    if (!this.intersects(obj)) return new geoExtent();
+	    return new geoExtent([Math.max(obj[0][0], this[0][0]), Math.max(obj[0][1], this[0][1])], [Math.min(obj[1][0], this[1][0]), Math.min(obj[1][1], this[1][1])]);
+	  },
+	  percentContainedIn: function percentContainedIn(obj) {
+	    if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+	    var a1 = this.intersection(obj).area();
+	    var a2 = this.area();
+
+	    if (a1 === Infinity || a2 === Infinity) {
+	      return 0;
+	    } else if (a1 === 0 || a2 === 0) {
+	      if (obj.contains(this)) {
+	        return 1;
+	      }
 
-	function filterContextListener(listener, index, group) {
-	  listener = contextListener(listener, index, group);
-	  return function(event) {
-	    var related = event.relatedTarget;
-	    if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
-	      listener.call(this, event);
+	      return 0;
+	    } else {
+	      return a1 / a2;
 	    }
-	  };
-	}
+	  },
+	  padByMeters: function padByMeters(meters) {
+	    var dLat = geoMetersToLat(meters);
+	    var dLon = geoMetersToLon(meters, this.center()[1]);
+	    return geoExtent([this[0][0] - dLon, this[0][1] - dLat], [this[1][0] + dLon, this[1][1] + dLat]);
+	  },
+	  toParam: function toParam() {
+	    return this.rectangle().join(',');
+	  }
+	});
 
-	function contextListener(listener, index, group) {
-	  return function(event1) {
-	    var event0 = event; // Events can be reentrant (e.g., focus).
-	    event = event1;
-	    try {
-	      listener.call(this, this.__data__, index, group);
-	    } finally {
-	      event = event0;
-	    }
-	  };
-	}
+	var $$w = _export;
+	var $every = arrayIteration.every;
+	var arrayMethodIsStrict$2 = arrayMethodIsStrict$9;
 
-	function parseTypenames$1(typenames) {
-	  return typenames.trim().split(/^|\s+/).map(function(t) {
-	    var name = "", i = t.indexOf(".");
-	    if (i >= 0) { name = t.slice(i + 1), t = t.slice(0, i); }
-	    return {type: t, name: name};
-	  });
-	}
+	var STRICT_METHOD$2 = arrayMethodIsStrict$2('every');
 
-	function onRemove(typename) {
-	  return function() {
-	    var on = this.__on;
-	    if (!on) { return; }
-	    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
-	      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
-	        this.removeEventListener(o.type, o.listener, o.capture);
-	      } else {
-	        on[++i] = o;
-	      }
-	    }
-	    if (++i) { on.length = i; }
-	    else { delete this.__on; }
-	  };
-	}
+	// `Array.prototype.every` method
+	// https://tc39.es/ecma262/#sec-array.prototype.every
+	$$w({ target: 'Array', proto: true, forced: !STRICT_METHOD$2 }, {
+	  every: function every(callbackfn /* , thisArg */) {
+	    return $every(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	function onAdd(typename, value, capture) {
-	  var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
-	  return function(d, i, group) {
-	    var on = this.__on, o, listener = wrap(value, i, group);
-	    if (on) { for (var j = 0, m = on.length; j < m; ++j) {
-	      if ((o = on[j]).type === typename.type && o.name === typename.name) {
-	        this.removeEventListener(o.type, o.listener, o.capture);
-	        this.addEventListener(o.type, o.listener = listener, o.capture = capture);
-	        o.value = value;
-	        return;
-	      }
-	    } }
-	    this.addEventListener(typename.type, listener, capture);
-	    o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};
-	    if (!on) { this.__on = [o]; }
-	    else { on.push(o); }
-	  };
-	}
+	var $$v = _export;
+	var $reduce = arrayReduce.left;
+	var arrayMethodIsStrict$1 = arrayMethodIsStrict$9;
+	var CHROME_VERSION$1 = engineV8Version;
+	var IS_NODE$1 = engineIsNode;
 
-	function selection_on(typename, value, capture) {
-	  var typenames = parseTypenames$1(typename + ""), i, n = typenames.length, t;
+	var STRICT_METHOD$1 = arrayMethodIsStrict$1('reduce');
+	// Chrome 80-82 has a critical bug
+	// https://bugs.chromium.org/p/chromium/issues/detail?id=1049982
+	var CHROME_BUG$1 = !IS_NODE$1 && CHROME_VERSION$1 > 79 && CHROME_VERSION$1 < 83;
 
-	  if (arguments.length < 2) {
-	    var on = this.node().__on;
-	    if (on) { for (var j = 0, m = on.length, o; j < m; ++j) {
-	      for (i = 0, o = on[j]; i < n; ++i) {
-	        if ((t = typenames[i]).type === o.type && t.name === o.name) {
-	          return o.value;
-	        }
-	      }
-	    } }
-	    return;
+	// `Array.prototype.reduce` method
+	// https://tc39.es/ecma262/#sec-array.prototype.reduce
+	$$v({ target: 'Array', proto: true, forced: !STRICT_METHOD$1 || CHROME_BUG$1 }, {
+	  reduce: function reduce(callbackfn /* , initialValue */) {
+	    var length = arguments.length;
+	    return $reduce(this, callbackfn, length, length > 1 ? arguments[1] : undefined);
 	  }
+	});
 
-	  on = value ? onAdd : onRemove;
-	  if (capture == null) { capture = false; }
-	  for (i = 0; i < n; ++i) { this.each(on(typenames[i], value, capture)); }
-	  return this;
-	}
+	function d3_polygonArea (polygon) {
+	  var i = -1,
+	      n = polygon.length,
+	      a,
+	      b = polygon[n - 1],
+	      area = 0;
 
-	function customEvent(event1, listener, that, args) {
-	  var event0 = event;
-	  event1.sourceEvent = event;
-	  event = event1;
-	  try {
-	    return listener.apply(that, args);
-	  } finally {
-	    event = event0;
+	  while (++i < n) {
+	    a = b;
+	    b = polygon[i];
+	    area += a[1] * b[0] - a[0] * b[1];
 	  }
+
+	  return area / 2;
 	}
 
-	function dispatchEvent(node, type, params) {
-	  var window = defaultView(node),
-	      event = window.CustomEvent;
+	function d3_polygonCentroid (polygon) {
+	  var i = -1,
+	      n = polygon.length,
+	      x = 0,
+	      y = 0,
+	      a,
+	      b = polygon[n - 1],
+	      c,
+	      k = 0;
 
-	  if (typeof event === "function") {
-	    event = new event(type, params);
-	  } else {
-	    event = window.document.createEvent("Event");
-	    if (params) { event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail; }
-	    else { event.initEvent(type, false, false); }
+	  while (++i < n) {
+	    a = b;
+	    b = polygon[i];
+	    k += c = a[0] * b[1] - b[0] * a[1];
+	    x += (a[0] + b[0]) * c;
+	    y += (a[1] + b[1]) * c;
 	  }
 
-	  node.dispatchEvent(event);
+	  return k *= 3, [x / k, y / k];
 	}
 
-	function dispatchConstant(type, params) {
-	  return function() {
-	    return dispatchEvent(this, type, params);
-	  };
+	// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
+	// the 3D cross product in a quadrant I Cartesian coordinate system (+x is
+	// right, +y is up). Returns a positive value if ABC is counter-clockwise,
+	// negative if clockwise, and zero if the points are collinear.
+	function cross (a, b, c) {
+	  return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
 	}
 
-	function dispatchFunction(type, params) {
-	  return function() {
-	    return dispatchEvent(this, type, params.apply(this, arguments));
-	  };
-	}
+	function lexicographicOrder(a, b) {
+	  return a[0] - b[0] || a[1] - b[1];
+	} // Computes the upper convex hull per the monotone chain algorithm.
+	// Assumes points.length >= 3, is sorted by x, unique in y.
+	// Returns an array of indices into points in left-to-right order.
 
-	function selection_dispatch(type, params) {
-	  return this.each((typeof params === "function"
-	      ? dispatchFunction
-	      : dispatchConstant)(type, params));
-	}
 
-	var root$1 = [null];
+	function computeUpperHullIndexes(points) {
+	  var n = points.length,
+	      indexes = [0, 1];
+	  var size = 2,
+	      i;
 
-	function Selection(groups, parents) {
-	  this._groups = groups;
-	  this._parents = parents;
-	}
+	  for (i = 2; i < n; ++i) {
+	    while (size > 1 && cross(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) {
+	      --size;
+	    }
 
-	function selection() {
-	  return new Selection([[document.documentElement]], root$1);
+	    indexes[size++] = i;
+	  }
+
+	  return indexes.slice(0, size); // remove popped points
 	}
 
-	Selection.prototype = selection.prototype = {
-	  constructor: Selection,
-	  select: selection_select,
-	  selectAll: selection_selectAll,
-	  filter: selection_filter,
-	  data: selection_data,
-	  enter: selection_enter,
-	  exit: selection_exit,
-	  join: selection_join,
-	  merge: selection_merge,
-	  order: selection_order,
-	  sort: selection_sort,
-	  call: selection_call,
-	  nodes: selection_nodes,
-	  node: selection_node,
-	  size: selection_size,
-	  empty: selection_empty,
-	  each: selection_each,
-	  attr: selection_attr,
-	  style: selection_style,
-	  property: selection_property,
-	  classed: selection_classed,
-	  text: selection_text,
-	  html: selection_html,
-	  raise: selection_raise,
-	  lower: selection_lower,
-	  append: selection_append,
-	  insert: selection_insert,
-	  remove: selection_remove,
-	  clone: selection_clone,
-	  datum: selection_datum,
-	  on: selection_on,
-	  dispatch: selection_dispatch
-	};
+	function d3_polygonHull (points) {
+	  if ((n = points.length) < 3) return null;
+	  var i,
+	      n,
+	      sortedPoints = new Array(n),
+	      flippedPoints = new Array(n);
 
-	function select(selector) {
-	  return typeof selector === "string"
-	      ? new Selection([[document.querySelector(selector)]], [document.documentElement])
-	      : new Selection([[selector]], root$1);
-	}
+	  for (i = 0; i < n; ++i) {
+	    sortedPoints[i] = [+points[i][0], +points[i][1], i];
+	  }
 
-	function sourceEvent() {
-	  var current = event, source;
-	  while (source = current.sourceEvent) { current = source; }
-	  return current;
-	}
+	  sortedPoints.sort(lexicographicOrder);
+
+	  for (i = 0; i < n; ++i) {
+	    flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];
+	  }
 
-	function point(node, event) {
-	  var svg = node.ownerSVGElement || node;
+	  var upperIndexes = computeUpperHullIndexes(sortedPoints),
+	      lowerIndexes = computeUpperHullIndexes(flippedPoints); // Construct the hull polygon, removing possible duplicate endpoints.
+
+	  var skipLeft = lowerIndexes[0] === upperIndexes[0],
+	      skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
+	      hull = []; // Add upper hull in right-to-l order.
+	  // Then add lower hull in left-to-right order.
 
-	  if (svg.createSVGPoint) {
-	    var point = svg.createSVGPoint();
-	    point.x = event.clientX, point.y = event.clientY;
-	    point = point.matrixTransform(node.getScreenCTM().inverse());
-	    return [point.x, point.y];
+	  for (i = upperIndexes.length - 1; i >= 0; --i) {
+	    hull.push(points[sortedPoints[upperIndexes[i]][2]]);
 	  }
 
-	  var rect = node.getBoundingClientRect();
-	  return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
-	}
+	  for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) {
+	    hull.push(points[sortedPoints[lowerIndexes[i]][2]]);
+	  }
 
-	function mouse(node) {
-	  var event = sourceEvent();
-	  if (event.changedTouches) { event = event.changedTouches[0]; }
-	  return point(node, event);
+	  return hull;
 	}
 
-	function selectAll(selector) {
-	  return typeof selector === "string"
-	      ? new Selection([document.querySelectorAll(selector)], [document.documentElement])
-	      : new Selection([selector == null ? [] : selector], root$1);
-	}
+	// vector equals
+	function geoVecEqual(a, b, epsilon) {
+	  if (epsilon) {
+	    return Math.abs(a[0] - b[0]) <= epsilon && Math.abs(a[1] - b[1]) <= epsilon;
+	  } else {
+	    return a[0] === b[0] && a[1] === b[1];
+	  }
+	} // vector addition
+
+	function geoVecAdd(a, b) {
+	  return [a[0] + b[0], a[1] + b[1]];
+	} // vector subtraction
+
+	function geoVecSubtract(a, b) {
+	  return [a[0] - b[0], a[1] - b[1]];
+	} // vector scaling
+
+	function geoVecScale(a, mag) {
+	  return [a[0] * mag, a[1] * mag];
+	} // vector rounding (was: geoRoundCoordinates)
+
+	function geoVecFloor(a) {
+	  return [Math.floor(a[0]), Math.floor(a[1])];
+	} // linear interpolation
+
+	function geoVecInterp(a, b, t) {
+	  return [a[0] + (b[0] - a[0]) * t, a[1] + (b[1] - a[1]) * t];
+	} // http://jsperf.com/id-dist-optimization
+
+	function geoVecLength(a, b) {
+	  return Math.sqrt(geoVecLengthSquare(a, b));
+	} // length of vector raised to the power two
+
+	function geoVecLengthSquare(a, b) {
+	  b = b || [0, 0];
+	  var x = a[0] - b[0];
+	  var y = a[1] - b[1];
+	  return x * x + y * y;
+	} // get a unit vector
+
+	function geoVecNormalize(a) {
+	  var length = Math.sqrt(a[0] * a[0] + a[1] * a[1]);
+
+	  if (length !== 0) {
+	    return geoVecScale(a, 1 / length);
+	  }
+
+	  return [0, 0];
+	} // Return the counterclockwise angle in the range (-pi, pi)
+	// between the positive X axis and the line intersecting a and b.
+
+	function geoVecAngle(a, b) {
+	  return Math.atan2(b[1] - a[1], b[0] - a[0]);
+	} // dot product
+
+	function geoVecDot(a, b, origin) {
+	  origin = origin || [0, 0];
+	  var p = geoVecSubtract(a, origin);
+	  var q = geoVecSubtract(b, origin);
+	  return p[0] * q[0] + p[1] * q[1];
+	} // normalized dot product
+
+	function geoVecNormalizedDot(a, b, origin) {
+	  origin = origin || [0, 0];
+	  var p = geoVecNormalize(geoVecSubtract(a, origin));
+	  var q = geoVecNormalize(geoVecSubtract(b, origin));
+	  return geoVecDot(p, q);
+	} // 2D cross product of OA and OB vectors, returns magnitude of Z vector
+	// Returns a positive value, if OAB makes a counter-clockwise turn,
+	// negative for clockwise turn, and zero if the points are collinear.
+
+	function geoVecCross(a, b, origin) {
+	  origin = origin || [0, 0];
+	  var p = geoVecSubtract(a, origin);
+	  var q = geoVecSubtract(b, origin);
+	  return p[0] * q[1] - p[1] * q[0];
+	} // find closest orthogonal projection of point onto points array
+
+	function geoVecProject(a, points) {
+	  var min = Infinity;
+	  var idx;
+	  var target;
+
+	  for (var i = 0; i < points.length - 1; i++) {
+	    var o = points[i];
+	    var s = geoVecSubtract(points[i + 1], o);
+	    var v = geoVecSubtract(a, o);
+	    var proj = geoVecDot(v, s) / geoVecDot(s, s);
+	    var p;
+
+	    if (proj < 0) {
+	      p = o;
+	    } else if (proj > 1) {
+	      p = points[i + 1];
+	    } else {
+	      p = [o[0] + proj * s[0], o[1] + proj * s[1]];
+	    }
 
-	function touch(node, touches, identifier) {
-	  if (arguments.length < 3) { identifier = touches, touches = sourceEvent().changedTouches; }
+	    var dist = geoVecLength(p, a);
 
-	  for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {
-	    if ((touch = touches[i]).identifier === identifier) {
-	      return point(node, touch);
+	    if (dist < min) {
+	      min = dist;
+	      idx = i + 1;
+	      target = p;
 	    }
 	  }
 
-	  return null;
+	  if (idx !== undefined) {
+	    return {
+	      index: idx,
+	      distance: min,
+	      target: target
+	    };
+	  } else {
+	    return null;
+	  }
 	}
 
-	function nopropagation() {
-	  event.stopImmediatePropagation();
-	}
+	// between the positive X axis and the line intersecting a and b.
 
-	function noevent() {
-	  event.preventDefault();
-	  event.stopImmediatePropagation();
+	function geoAngle(a, b, projection) {
+	  return geoVecAngle(projection(a.loc), projection(b.loc));
 	}
+	function geoEdgeEqual(a, b) {
+	  return a[0] === b[0] && a[1] === b[1] || a[0] === b[1] && a[1] === b[0];
+	} // Rotate all points counterclockwise around a pivot point by given angle
 
-	function dragDisable(view) {
-	  var root = view.document.documentElement,
-	      selection = select(view).on("dragstart.drag", noevent, true);
-	  if ("onselectstart" in root) {
-	    selection.on("selectstart.drag", noevent, true);
+	function geoRotate(points, angle, around) {
+	  return points.map(function (point) {
+	    var radial = geoVecSubtract(point, around);
+	    return [radial[0] * Math.cos(angle) - radial[1] * Math.sin(angle) + around[0], radial[0] * Math.sin(angle) + radial[1] * Math.cos(angle) + around[1]];
+	  });
+	} // Choose the edge with the minimal distance from `point` to its orthogonal
+	// projection onto that edge, if such a projection exists, or the distance to
+	// the closest vertex on that edge. Returns an object with the `index` of the
+	// chosen edge, the chosen `loc` on that edge, and the `distance` to to it.
+
+	function geoChooseEdge(nodes, point, projection, activeID) {
+	  var dist = geoVecLength;
+	  var points = nodes.map(function (n) {
+	    return projection(n.loc);
+	  });
+	  var ids = nodes.map(function (n) {
+	    return n.id;
+	  });
+	  var min = Infinity;
+	  var idx;
+	  var loc;
+
+	  for (var i = 0; i < points.length - 1; i++) {
+	    if (ids[i] === activeID || ids[i + 1] === activeID) continue;
+	    var o = points[i];
+	    var s = geoVecSubtract(points[i + 1], o);
+	    var v = geoVecSubtract(point, o);
+	    var proj = geoVecDot(v, s) / geoVecDot(s, s);
+	    var p;
+
+	    if (proj < 0) {
+	      p = o;
+	    } else if (proj > 1) {
+	      p = points[i + 1];
+	    } else {
+	      p = [o[0] + proj * s[0], o[1] + proj * s[1]];
+	    }
+
+	    var d = dist(p, point);
+
+	    if (d < min) {
+	      min = d;
+	      idx = i + 1;
+	      loc = projection.invert(p);
+	    }
+	  }
+
+	  if (idx !== undefined) {
+	    return {
+	      index: idx,
+	      distance: min,
+	      loc: loc
+	    };
 	  } else {
-	    root.__noselect = root.style.MozUserSelect;
-	    root.style.MozUserSelect = "none";
+	    return null;
+	  }
+	} // Test active (dragged or drawing) segments against inactive segments
+	// This is used to test e.g. multipolygon rings that cross
+	// `activeNodes` is the ring containing the activeID being dragged.
+	// `inactiveNodes` is the other ring to test against
+
+	function geoHasLineIntersections(activeNodes, inactiveNodes, activeID) {
+	  var actives = [];
+	  var inactives = [];
+	  var j, k, n1, n2, segment; // gather active segments (only segments in activeNodes that contain the activeID)
+
+	  for (j = 0; j < activeNodes.length - 1; j++) {
+	    n1 = activeNodes[j];
+	    n2 = activeNodes[j + 1];
+	    segment = [n1.loc, n2.loc];
+
+	    if (n1.id === activeID || n2.id === activeID) {
+	      actives.push(segment);
+	    }
+	  } // gather inactive segments
+
+
+	  for (j = 0; j < inactiveNodes.length - 1; j++) {
+	    n1 = inactiveNodes[j];
+	    n2 = inactiveNodes[j + 1];
+	    segment = [n1.loc, n2.loc];
+	    inactives.push(segment);
+	  } // test
+
+
+	  for (j = 0; j < actives.length; j++) {
+	    for (k = 0; k < inactives.length; k++) {
+	      var p = actives[j];
+	      var q = inactives[k];
+	      var hit = geoLineIntersection(p, q);
+
+	      if (hit) {
+	        return true;
+	      }
+	    }
+	  }
+
+	  return false;
+	} // Test active (dragged or drawing) segments against inactive segments
+	// This is used to test whether a way intersects with itself.
+
+	function geoHasSelfIntersections(nodes, activeID) {
+	  var actives = [];
+	  var inactives = [];
+	  var j, k; // group active and passive segments along the nodes
+
+	  for (j = 0; j < nodes.length - 1; j++) {
+	    var n1 = nodes[j];
+	    var n2 = nodes[j + 1];
+	    var segment = [n1.loc, n2.loc];
+
+	    if (n1.id === activeID || n2.id === activeID) {
+	      actives.push(segment);
+	    } else {
+	      inactives.push(segment);
+	    }
+	  } // test
+
+
+	  for (j = 0; j < actives.length; j++) {
+	    for (k = 0; k < inactives.length; k++) {
+	      var p = actives[j];
+	      var q = inactives[k]; // skip if segments share an endpoint
+
+	      if (geoVecEqual(p[1], q[0]) || geoVecEqual(p[0], q[1]) || geoVecEqual(p[0], q[0]) || geoVecEqual(p[1], q[1])) {
+	        continue;
+	      }
+
+	      var hit = geoLineIntersection(p, q);
+
+	      if (hit) {
+	        var epsilon = 1e-8; // skip if the hit is at the segment's endpoint
+
+	        if (geoVecEqual(p[1], hit, epsilon) || geoVecEqual(p[0], hit, epsilon) || geoVecEqual(q[1], hit, epsilon) || geoVecEqual(q[0], hit, epsilon)) {
+	          continue;
+	        } else {
+	          return true;
+	        }
+	      }
+	    }
+	  }
+
+	  return false;
+	} // Return the intersection point of 2 line segments.
+	// From https://github.com/pgkelley4/line-segments-intersect
+	// This uses the vector cross product approach described below:
+	//  http://stackoverflow.com/a/565282/786339
+
+	function geoLineIntersection(a, b) {
+	  var p = [a[0][0], a[0][1]];
+	  var p2 = [a[1][0], a[1][1]];
+	  var q = [b[0][0], b[0][1]];
+	  var q2 = [b[1][0], b[1][1]];
+	  var r = geoVecSubtract(p2, p);
+	  var s = geoVecSubtract(q2, q);
+	  var uNumerator = geoVecCross(geoVecSubtract(q, p), r);
+	  var denominator = geoVecCross(r, s);
+
+	  if (uNumerator && denominator) {
+	    var u = uNumerator / denominator;
+	    var t = geoVecCross(geoVecSubtract(q, p), s) / denominator;
+
+	    if (t >= 0 && t <= 1 && u >= 0 && u <= 1) {
+	      return geoVecInterp(p, p2, t);
+	    }
 	  }
+
+	  return null;
 	}
+	function geoPathIntersections(path1, path2) {
+	  var intersections = [];
 
-	function yesdrag(view, noclick) {
-	  var root = view.document.documentElement,
-	      selection = select(view).on("dragstart.drag", null);
-	  if (noclick) {
-	    selection.on("click.drag", noevent, true);
-	    setTimeout(function() { selection.on("click.drag", null); }, 0);
+	  for (var i = 0; i < path1.length - 1; i++) {
+	    for (var j = 0; j < path2.length - 1; j++) {
+	      var a = [path1[i], path1[i + 1]];
+	      var b = [path2[j], path2[j + 1]];
+	      var hit = geoLineIntersection(a, b);
+
+	      if (hit) {
+	        intersections.push(hit);
+	      }
+	    }
 	  }
-	  if ("onselectstart" in root) {
-	    selection.on("selectstart.drag", null);
-	  } else {
-	    root.style.MozUserSelect = root.__noselect;
-	    delete root.__noselect;
+
+	  return intersections;
+	}
+	function geoPathHasIntersections(path1, path2) {
+	  for (var i = 0; i < path1.length - 1; i++) {
+	    for (var j = 0; j < path2.length - 1; j++) {
+	      var a = [path1[i], path1[i + 1]];
+	      var b = [path2[j], path2[j + 1]];
+	      var hit = geoLineIntersection(a, b);
+
+	      if (hit) {
+	        return true;
+	      }
+	    }
+	  }
+
+	  return false;
+	} // Return whether point is contained in polygon.
+	//
+	// `point` should be a 2-item array of coordinates.
+	// `polygon` should be an array of 2-item arrays of coordinates.
+	//
+	// From https://github.com/substack/point-in-polygon.
+	// ray-casting algorithm based on
+	// http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
+	//
+
+	function geoPointInPolygon(point, polygon) {
+	  var x = point[0];
+	  var y = point[1];
+	  var inside = false;
+
+	  for (var i = 0, j = polygon.length - 1; i < polygon.length; j = i++) {
+	    var xi = polygon[i][0];
+	    var yi = polygon[i][1];
+	    var xj = polygon[j][0];
+	    var yj = polygon[j][1];
+	    var intersect = yi > y !== yj > y && x < (xj - xi) * (y - yi) / (yj - yi) + xi;
+	    if (intersect) inside = !inside;
 	  }
+
+	  return inside;
 	}
+	function geoPolygonContainsPolygon(outer, inner) {
+	  return inner.every(function (point) {
+	    return geoPointInPolygon(point, outer);
+	  });
+	}
+	function geoPolygonIntersectsPolygon(outer, inner, checkSegments) {
+	  function testPoints(outer, inner) {
+	    return inner.some(function (point) {
+	      return geoPointInPolygon(point, outer);
+	    });
+	  }
 
-	function constant$1(x) {
-	  return function() {
-	    return x;
+	  return testPoints(outer, inner) || !!checkSegments && geoPathHasIntersections(outer, inner);
+	} // http://gis.stackexchange.com/questions/22895/finding-minimum-area-rectangle-for-given-points
+	// http://gis.stackexchange.com/questions/3739/generalisation-strategies-for-building-outlines/3756#3756
+
+	function geoGetSmallestSurroundingRectangle(points) {
+	  var hull = d3_polygonHull(points);
+	  var centroid = d3_polygonCentroid(hull);
+	  var minArea = Infinity;
+	  var ssrExtent = [];
+	  var ssrAngle = 0;
+	  var c1 = hull[0];
+
+	  for (var i = 0; i <= hull.length - 1; i++) {
+	    var c2 = i === hull.length - 1 ? hull[0] : hull[i + 1];
+	    var angle = Math.atan2(c2[1] - c1[1], c2[0] - c1[0]);
+	    var poly = geoRotate(hull, -angle, centroid);
+	    var extent = poly.reduce(function (extent, point) {
+	      return extent.extend(geoExtent(point));
+	    }, geoExtent());
+	    var area = extent.area();
+
+	    if (area < minArea) {
+	      minArea = area;
+	      ssrExtent = extent;
+	      ssrAngle = angle;
+	    }
+
+	    c1 = c2;
+	  }
+
+	  return {
+	    poly: geoRotate(ssrExtent.polygon(), ssrAngle, centroid),
+	    angle: ssrAngle
 	  };
 	}
+	function geoPathLength(path) {
+	  var length = 0;
 
-	function DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {
-	  this.target = target;
-	  this.type = type;
-	  this.subject = subject;
-	  this.identifier = id;
-	  this.active = active;
-	  this.x = x;
-	  this.y = y;
-	  this.dx = dx;
-	  this.dy = dy;
-	  this._ = dispatch;
+	  for (var i = 0; i < path.length - 1; i++) {
+	    length += geoVecLength(path[i], path[i + 1]);
+	  }
+
+	  return length;
+	} // If the given point is at the edge of the padded viewport,
+	// return a vector that will nudge the viewport in that direction
+
+	function geoViewportEdge(point, dimensions) {
+	  var pad = [80, 20, 50, 20]; // top, right, bottom, left
+
+	  var x = 0;
+	  var y = 0;
+
+	  if (point[0] > dimensions[0] - pad[1]) {
+	    x = -10;
+	  }
+
+	  if (point[0] < pad[3]) {
+	    x = 10;
+	  }
+
+	  if (point[1] > dimensions[1] - pad[2]) {
+	    y = -10;
+	  }
+
+	  if (point[1] < pad[0]) {
+	    y = 10;
+	  }
+
+	  if (x || y) {
+	    return [x, y];
+	  } else {
+	    return null;
+	  }
 	}
 
-	DragEvent.prototype.on = function() {
-	  var value = this._.on.apply(this._, arguments);
-	  return value === this._ ? this : value;
+	var noop = {
+	  value: function value() {}
 	};
 
-	// Ignore right-click, since that should open the context menu.
-	function defaultFilter() {
-	  return !event.ctrlKey && !event.button;
-	}
+	function dispatch$8() {
+	  for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
+	    if (!(t = arguments[i] + "") || t in _ || /[\s.]/.test(t)) throw new Error("illegal type: " + t);
+	    _[t] = [];
+	  }
 
-	function defaultContainer() {
-	  return this.parentNode;
+	  return new Dispatch(_);
 	}
 
-	function defaultSubject(d) {
-	  return d == null ? {x: event.x, y: event.y} : d;
+	function Dispatch(_) {
+	  this._ = _;
 	}
 
-	function defaultTouchable() {
-	  return navigator.maxTouchPoints || ("ontouchstart" in this);
+	function parseTypenames$1(typenames, types) {
+	  return typenames.trim().split(/^|\s+/).map(function (t) {
+	    var name = "",
+	        i = t.indexOf(".");
+	    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+	    if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
+	    return {
+	      type: t,
+	      name: name
+	    };
+	  });
 	}
 
-	function d3_drag() {
-	  var filter = defaultFilter,
-	      container = defaultContainer,
-	      subject = defaultSubject,
-	      touchable = defaultTouchable,
-	      gestures = {},
-	      listeners = dispatch("start", "drag", "end"),
-	      active = 0,
-	      mousedownx,
-	      mousedowny,
-	      mousemoving,
-	      touchending,
-	      clickDistance2 = 0;
+	Dispatch.prototype = dispatch$8.prototype = {
+	  constructor: Dispatch,
+	  on: function on(typename, callback) {
+	    var _ = this._,
+	        T = parseTypenames$1(typename + "", _),
+	        t,
+	        i = -1,
+	        n = T.length; // If no callback was specified, return the callback of the given type and name.
 
-	  function drag(selection) {
-	    selection
-	        .on("mousedown.drag", mousedowned)
-	      .filter(touchable)
-	        .on("touchstart.drag", touchstarted)
-	        .on("touchmove.drag", touchmoved)
-	        .on("touchend.drag touchcancel.drag", touchended)
-	        .style("touch-action", "none")
-	        .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
-	  }
-
-	  function mousedowned() {
-	    if (touchending || !filter.apply(this, arguments)) { return; }
-	    var gesture = beforestart("mouse", container.apply(this, arguments), mouse, this, arguments);
-	    if (!gesture) { return; }
-	    select(event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
-	    dragDisable(event.view);
-	    nopropagation();
-	    mousemoving = false;
-	    mousedownx = event.clientX;
-	    mousedowny = event.clientY;
-	    gesture("start");
-	  }
+	    if (arguments.length < 2) {
+	      while (++i < n) {
+	        if ((t = (typename = T[i]).type) && (t = get$2(_[t], typename.name))) return t;
+	      }
 
-	  function mousemoved() {
-	    noevent();
-	    if (!mousemoving) {
-	      var dx = event.clientX - mousedownx, dy = event.clientY - mousedowny;
-	      mousemoving = dx * dx + dy * dy > clickDistance2;
+	      return;
+	    } // If a type was specified, set the callback for the given type and name.
+	    // Otherwise, if a null callback was specified, remove callbacks of the given name.
+
+
+	    if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
+
+	    while (++i < n) {
+	      if (t = (typename = T[i]).type) _[t] = set$1(_[t], typename.name, callback);else if (callback == null) for (t in _) {
+	        _[t] = set$1(_[t], typename.name, null);
+	      }
 	    }
-	    gestures.mouse("drag");
-	  }
 
-	  function mouseupped() {
-	    select(event.view).on("mousemove.drag mouseup.drag", null);
-	    yesdrag(event.view, mousemoving);
-	    noevent();
-	    gestures.mouse("end");
-	  }
+	    return this;
+	  },
+	  copy: function copy() {
+	    var copy = {},
+	        _ = this._;
 
-	  function touchstarted() {
-	    var arguments$1 = arguments;
+	    for (var t in _) {
+	      copy[t] = _[t].slice();
+	    }
 
-	    if (!filter.apply(this, arguments)) { return; }
-	    var touches = event.changedTouches,
-	        c = container.apply(this, arguments),
-	        n = touches.length, i, gesture;
+	    return new Dispatch(copy);
+	  },
+	  call: function call(type, that) {
+	    if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) {
+	      args[i] = arguments[i + 2];
+	    }
+	    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
 
-	    for (i = 0; i < n; ++i) {
-	      if (gesture = beforestart(touches[i].identifier, c, touch, this, arguments$1)) {
-	        nopropagation();
-	        gesture("start");
-	      }
+	    for (t = this._[type], i = 0, n = t.length; i < n; ++i) {
+	      t[i].value.apply(that, args);
+	    }
+	  },
+	  apply: function apply(type, that, args) {
+	    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
+
+	    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) {
+	      t[i].value.apply(that, args);
 	    }
 	  }
+	};
 
-	  function touchmoved() {
-	    var touches = event.changedTouches,
-	        n = touches.length, i, gesture;
+	function get$2(type, name) {
+	  for (var i = 0, n = type.length, c; i < n; ++i) {
+	    if ((c = type[i]).name === name) {
+	      return c.value;
+	    }
+	  }
+	}
 
-	    for (i = 0; i < n; ++i) {
-	      if (gesture = gestures[touches[i].identifier]) {
-	        noevent();
-	        gesture("drag");
-	      }
+	function set$1(type, name, callback) {
+	  for (var i = 0, n = type.length; i < n; ++i) {
+	    if (type[i].name === name) {
+	      type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
+	      break;
 	    }
 	  }
 
-	  function touchended() {
-	    var touches = event.changedTouches,
-	        n = touches.length, i, gesture;
+	  if (callback != null) type.push({
+	    name: name,
+	    value: callback
+	  });
+	  return type;
+	}
 
-	    if (touchending) { clearTimeout(touchending); }
-	    touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
-	    for (i = 0; i < n; ++i) {
-	      if (gesture = gestures[touches[i].identifier]) {
-	        nopropagation();
-	        gesture("end");
+	var xhtml = "http://www.w3.org/1999/xhtml";
+	var namespaces = {
+	  svg: "http://www.w3.org/2000/svg",
+	  xhtml: xhtml,
+	  xlink: "http://www.w3.org/1999/xlink",
+	  xml: "http://www.w3.org/XML/1998/namespace",
+	  xmlns: "http://www.w3.org/2000/xmlns/"
+	};
+
+	function namespace (name) {
+	  var prefix = name += "",
+	      i = prefix.indexOf(":");
+	  if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
+	  return namespaces.hasOwnProperty(prefix) ? {
+	    space: namespaces[prefix],
+	    local: name
+	  } : name; // eslint-disable-line no-prototype-builtins
+	}
+
+	function creatorInherit(name) {
+	  return function () {
+	    var document = this.ownerDocument,
+	        uri = this.namespaceURI;
+	    return uri === xhtml && document.documentElement.namespaceURI === xhtml ? document.createElement(name) : document.createElementNS(uri, name);
+	  };
+	}
+
+	function creatorFixed(fullname) {
+	  return function () {
+	    return this.ownerDocument.createElementNS(fullname.space, fullname.local);
+	  };
+	}
+
+	function creator (name) {
+	  var fullname = namespace(name);
+	  return (fullname.local ? creatorFixed : creatorInherit)(fullname);
+	}
+
+	function none() {}
+
+	function selector (selector) {
+	  return selector == null ? none : function () {
+	    return this.querySelector(selector);
+	  };
+	}
+
+	function selection_select (select) {
+	  if (typeof select !== "function") select = selector(select);
+
+	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+	      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+	        if ("__data__" in node) subnode.__data__ = node.__data__;
+	        subgroup[i] = subnode;
 	      }
 	    }
 	  }
 
-	  function beforestart(id, container, point, that, args) {
-	    var p = point(container, id), s, dx, dy,
-	        sublisteners = listeners.copy();
+	  return new Selection$1(subgroups, this._parents);
+	}
 
-	    if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {
-	      if ((event.subject = s = subject.apply(that, args)) == null) { return false; }
-	      dx = s.x - p[0] || 0;
-	      dy = s.y - p[1] || 0;
-	      return true;
-	    })) { return; }
+	function array (x) {
+	  return _typeof(x) === "object" && "length" in x ? x // Array, TypedArray, NodeList, array-like
+	  : Array.from(x); // Map, Set, iterable, string, or anything else
+	}
 
-	    return function gesture(type) {
-	      var p0 = p, n;
-	      switch (type) {
-	        case "start": gestures[id] = gesture, n = active++; break;
-	        case "end": delete gestures[id], --active; // nobreak
-	        case "drag": p = point(container, id), n = active; break;
-	      }
-	      customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);
-	    };
-	  }
+	function empty() {
+	  return [];
+	}
 
-	  drag.filter = function(_) {
-	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$1(!!_), drag) : filter;
+	function selectorAll (selector) {
+	  return selector == null ? empty : function () {
+	    return this.querySelectorAll(selector);
 	  };
+	}
 
-	  drag.container = function(_) {
-	    return arguments.length ? (container = typeof _ === "function" ? _ : constant$1(_), drag) : container;
+	function arrayAll(select) {
+	  return function () {
+	    var group = select.apply(this, arguments);
+	    return group == null ? [] : array(group);
 	  };
+	}
 
-	  drag.subject = function(_) {
-	    return arguments.length ? (subject = typeof _ === "function" ? _ : constant$1(_), drag) : subject;
-	  };
+	function selection_selectAll (select) {
+	  if (typeof select === "function") select = arrayAll(select);else select = selectorAll(select);
 
-	  drag.touchable = function(_) {
-	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$1(!!_), drag) : touchable;
-	  };
+	  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+	      if (node = group[i]) {
+	        subgroups.push(select.call(node, node.__data__, i, group));
+	        parents.push(node);
+	      }
+	    }
+	  }
 
-	  drag.on = function() {
-	    var value = listeners.on.apply(listeners, arguments);
-	    return value === listeners ? drag : value;
+	  return new Selection$1(subgroups, parents);
+	}
+
+	var $$u = _export;
+	var $find = arrayIteration.find;
+	var addToUnscopables$3 = addToUnscopables$6;
+
+	var FIND = 'find';
+	var SKIPS_HOLES$1 = true;
+
+	// Shouldn't skip holes
+	if (FIND in []) Array(1)[FIND](function () { SKIPS_HOLES$1 = false; });
+
+	// `Array.prototype.find` method
+	// https://tc39.es/ecma262/#sec-array.prototype.find
+	$$u({ target: 'Array', proto: true, forced: SKIPS_HOLES$1 }, {
+	  find: function find(callbackfn /* , that = undefined */) {
+	    return $find(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
+
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables$3(FIND);
+
+	function matcher (selector) {
+	  return function () {
+	    return this.matches(selector);
+	  };
+	}
+	function childMatcher(selector) {
+	  return function (node) {
+	    return node.matches(selector);
 	  };
+	}
 
-	  drag.clickDistance = function(_) {
-	    return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
+	var find = Array.prototype.find;
+
+	function childFind(match) {
+	  return function () {
+	    return find.call(this.children, match);
 	  };
+	}
 
-	  return drag;
+	function childFirst() {
+	  return this.firstElementChild;
 	}
 
-	function define$1(constructor, factory, prototype) {
-	  constructor.prototype = factory.prototype = prototype;
-	  prototype.constructor = constructor;
+	function selection_selectChild (match) {
+	  return this.select(match == null ? childFirst : childFind(typeof match === "function" ? match : childMatcher(match)));
 	}
 
-	function extend(parent, definition) {
-	  var prototype = Object.create(parent.prototype);
-	  for (var key in definition) { prototype[key] = definition[key]; }
-	  return prototype;
+	var filter = Array.prototype.filter;
+
+	function children() {
+	  return this.children;
 	}
 
-	function Color() {}
+	function childrenFilter(match) {
+	  return function () {
+	    return filter.call(this.children, match);
+	  };
+	}
 
-	var darker = 0.7;
-	var brighter = 1 / darker;
+	function selection_selectChildren (match) {
+	  return this.selectAll(match == null ? children : childrenFilter(typeof match === "function" ? match : childMatcher(match)));
+	}
 
-	var reI = "\\s*([+-]?\\d+)\\s*",
-	    reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*",
-	    reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
-	    reHex = /^#([0-9a-f]{3,8})$/,
-	    reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"),
-	    reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"),
-	    reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"),
-	    reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$"),
-	    reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$"),
-	    reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
+	function selection_filter (match) {
+	  if (typeof match !== "function") match = matcher(match);
 
-	var named = {
-	  aliceblue: 0xf0f8ff,
-	  antiquewhite: 0xfaebd7,
-	  aqua: 0x00ffff,
-	  aquamarine: 0x7fffd4,
-	  azure: 0xf0ffff,
-	  beige: 0xf5f5dc,
-	  bisque: 0xffe4c4,
-	  black: 0x000000,
-	  blanchedalmond: 0xffebcd,
-	  blue: 0x0000ff,
-	  blueviolet: 0x8a2be2,
-	  brown: 0xa52a2a,
-	  burlywood: 0xdeb887,
-	  cadetblue: 0x5f9ea0,
-	  chartreuse: 0x7fff00,
-	  chocolate: 0xd2691e,
-	  coral: 0xff7f50,
-	  cornflowerblue: 0x6495ed,
-	  cornsilk: 0xfff8dc,
-	  crimson: 0xdc143c,
-	  cyan: 0x00ffff,
-	  darkblue: 0x00008b,
-	  darkcyan: 0x008b8b,
-	  darkgoldenrod: 0xb8860b,
-	  darkgray: 0xa9a9a9,
-	  darkgreen: 0x006400,
-	  darkgrey: 0xa9a9a9,
-	  darkkhaki: 0xbdb76b,
-	  darkmagenta: 0x8b008b,
-	  darkolivegreen: 0x556b2f,
-	  darkorange: 0xff8c00,
-	  darkorchid: 0x9932cc,
-	  darkred: 0x8b0000,
-	  darksalmon: 0xe9967a,
-	  darkseagreen: 0x8fbc8f,
-	  darkslateblue: 0x483d8b,
-	  darkslategray: 0x2f4f4f,
-	  darkslategrey: 0x2f4f4f,
-	  darkturquoise: 0x00ced1,
-	  darkviolet: 0x9400d3,
-	  deeppink: 0xff1493,
-	  deepskyblue: 0x00bfff,
-	  dimgray: 0x696969,
-	  dimgrey: 0x696969,
-	  dodgerblue: 0x1e90ff,
-	  firebrick: 0xb22222,
-	  floralwhite: 0xfffaf0,
-	  forestgreen: 0x228b22,
-	  fuchsia: 0xff00ff,
-	  gainsboro: 0xdcdcdc,
-	  ghostwhite: 0xf8f8ff,
-	  gold: 0xffd700,
-	  goldenrod: 0xdaa520,
-	  gray: 0x808080,
-	  green: 0x008000,
-	  greenyellow: 0xadff2f,
-	  grey: 0x808080,
-	  honeydew: 0xf0fff0,
-	  hotpink: 0xff69b4,
-	  indianred: 0xcd5c5c,
-	  indigo: 0x4b0082,
-	  ivory: 0xfffff0,
-	  khaki: 0xf0e68c,
-	  lavender: 0xe6e6fa,
-	  lavenderblush: 0xfff0f5,
-	  lawngreen: 0x7cfc00,
-	  lemonchiffon: 0xfffacd,
-	  lightblue: 0xadd8e6,
-	  lightcoral: 0xf08080,
-	  lightcyan: 0xe0ffff,
-	  lightgoldenrodyellow: 0xfafad2,
-	  lightgray: 0xd3d3d3,
-	  lightgreen: 0x90ee90,
-	  lightgrey: 0xd3d3d3,
-	  lightpink: 0xffb6c1,
-	  lightsalmon: 0xffa07a,
-	  lightseagreen: 0x20b2aa,
-	  lightskyblue: 0x87cefa,
-	  lightslategray: 0x778899,
-	  lightslategrey: 0x778899,
-	  lightsteelblue: 0xb0c4de,
-	  lightyellow: 0xffffe0,
-	  lime: 0x00ff00,
-	  limegreen: 0x32cd32,
-	  linen: 0xfaf0e6,
-	  magenta: 0xff00ff,
-	  maroon: 0x800000,
-	  mediumaquamarine: 0x66cdaa,
-	  mediumblue: 0x0000cd,
-	  mediumorchid: 0xba55d3,
-	  mediumpurple: 0x9370db,
-	  mediumseagreen: 0x3cb371,
-	  mediumslateblue: 0x7b68ee,
-	  mediumspringgreen: 0x00fa9a,
-	  mediumturquoise: 0x48d1cc,
-	  mediumvioletred: 0xc71585,
-	  midnightblue: 0x191970,
-	  mintcream: 0xf5fffa,
-	  mistyrose: 0xffe4e1,
-	  moccasin: 0xffe4b5,
-	  navajowhite: 0xffdead,
-	  navy: 0x000080,
-	  oldlace: 0xfdf5e6,
-	  olive: 0x808000,
-	  olivedrab: 0x6b8e23,
-	  orange: 0xffa500,
-	  orangered: 0xff4500,
-	  orchid: 0xda70d6,
-	  palegoldenrod: 0xeee8aa,
-	  palegreen: 0x98fb98,
-	  paleturquoise: 0xafeeee,
-	  palevioletred: 0xdb7093,
-	  papayawhip: 0xffefd5,
-	  peachpuff: 0xffdab9,
-	  peru: 0xcd853f,
-	  pink: 0xffc0cb,
-	  plum: 0xdda0dd,
-	  powderblue: 0xb0e0e6,
-	  purple: 0x800080,
-	  rebeccapurple: 0x663399,
-	  red: 0xff0000,
-	  rosybrown: 0xbc8f8f,
-	  royalblue: 0x4169e1,
-	  saddlebrown: 0x8b4513,
-	  salmon: 0xfa8072,
-	  sandybrown: 0xf4a460,
-	  seagreen: 0x2e8b57,
-	  seashell: 0xfff5ee,
-	  sienna: 0xa0522d,
-	  silver: 0xc0c0c0,
-	  skyblue: 0x87ceeb,
-	  slateblue: 0x6a5acd,
-	  slategray: 0x708090,
-	  slategrey: 0x708090,
-	  snow: 0xfffafa,
-	  springgreen: 0x00ff7f,
-	  steelblue: 0x4682b4,
-	  tan: 0xd2b48c,
-	  teal: 0x008080,
-	  thistle: 0xd8bfd8,
-	  tomato: 0xff6347,
-	  turquoise: 0x40e0d0,
-	  violet: 0xee82ee,
-	  wheat: 0xf5deb3,
-	  white: 0xffffff,
-	  whitesmoke: 0xf5f5f5,
-	  yellow: 0xffff00,
-	  yellowgreen: 0x9acd32
-	};
-
-	define$1(Color, color, {
-	  copy: function(channels) {
-	    return Object.assign(new this.constructor, this, channels);
-	  },
-	  displayable: function() {
-	    return this.rgb().displayable();
-	  },
-	  hex: color_formatHex, // Deprecated! Use color.formatHex.
-	  formatHex: color_formatHex,
-	  formatHsl: color_formatHsl,
-	  formatRgb: color_formatRgb,
-	  toString: color_formatRgb
-	});
+	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+	      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+	        subgroup.push(node);
+	      }
+	    }
+	  }
 
-	function color_formatHex() {
-	  return this.rgb().formatHex();
+	  return new Selection$1(subgroups, this._parents);
 	}
 
-	function color_formatHsl() {
-	  return hslConvert(this).formatHsl();
+	function sparse (update) {
+	  return new Array(update.length);
 	}
 
-	function color_formatRgb() {
-	  return this.rgb().formatRgb();
+	function selection_enter () {
+	  return new Selection$1(this._enter || this._groups.map(sparse), this._parents);
 	}
-
-	function color(format) {
-	  var m, l;
-	  format = (format + "").trim().toLowerCase();
-	  return (m = reHex.exec(format)) ? (l = m[1].length, m = parseInt(m[1], 16), l === 6 ? rgbn(m) // #ff0000
-	      : l === 3 ? new Rgb((m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1) // #f00
-	      : l === 8 ? rgba(m >> 24 & 0xff, m >> 16 & 0xff, m >> 8 & 0xff, (m & 0xff) / 0xff) // #ff000000
-	      : l === 4 ? rgba((m >> 12 & 0xf) | (m >> 8 & 0xf0), (m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), (((m & 0xf) << 4) | (m & 0xf)) / 0xff) // #f000
-	      : null) // invalid hex
-	      : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
-	      : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
-	      : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
-	      : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
-	      : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
-	      : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
-	      : named.hasOwnProperty(format) ? rgbn(named[format]) // eslint-disable-line no-prototype-builtins
-	      : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0)
-	      : null;
+	function EnterNode(parent, datum) {
+	  this.ownerDocument = parent.ownerDocument;
+	  this.namespaceURI = parent.namespaceURI;
+	  this._next = null;
+	  this._parent = parent;
+	  this.__data__ = datum;
 	}
+	EnterNode.prototype = {
+	  constructor: EnterNode,
+	  appendChild: function appendChild(child) {
+	    return this._parent.insertBefore(child, this._next);
+	  },
+	  insertBefore: function insertBefore(child, next) {
+	    return this._parent.insertBefore(child, next);
+	  },
+	  querySelector: function querySelector(selector) {
+	    return this._parent.querySelector(selector);
+	  },
+	  querySelectorAll: function querySelectorAll(selector) {
+	    return this._parent.querySelectorAll(selector);
+	  }
+	};
 
-	function rgbn(n) {
-	  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
+	function constant$3 (x) {
+	  return function () {
+	    return x;
+	  };
 	}
 
-	function rgba(r, g, b, a) {
-	  if (a <= 0) { r = g = b = NaN; }
-	  return new Rgb(r, g, b, a);
-	}
+	function bindIndex(parent, group, enter, update, exit, data) {
+	  var i = 0,
+	      node,
+	      groupLength = group.length,
+	      dataLength = data.length; // Put any non-null nodes that fit into update.
+	  // Put any null nodes into enter.
+	  // Put any remaining data into enter.
 
-	function rgbConvert(o) {
-	  if (!(o instanceof Color)) { o = color(o); }
-	  if (!o) { return new Rgb; }
-	  o = o.rgb();
-	  return new Rgb(o.r, o.g, o.b, o.opacity);
+	  for (; i < dataLength; ++i) {
+	    if (node = group[i]) {
+	      node.__data__ = data[i];
+	      update[i] = node;
+	    } else {
+	      enter[i] = new EnterNode(parent, data[i]);
+	    }
+	  } // Put any non-null nodes that don’t fit into exit.
+
+
+	  for (; i < groupLength; ++i) {
+	    if (node = group[i]) {
+	      exit[i] = node;
+	    }
+	  }
 	}
 
-	function rgb(r, g, b, opacity) {
-	  return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
+	function bindKey(parent, group, enter, update, exit, data, key) {
+	  var i,
+	      node,
+	      nodeByKeyValue = new Map(),
+	      groupLength = group.length,
+	      dataLength = data.length,
+	      keyValues = new Array(groupLength),
+	      keyValue; // Compute the key for each node.
+	  // If multiple nodes have the same key, the duplicates are added to exit.
+
+	  for (i = 0; i < groupLength; ++i) {
+	    if (node = group[i]) {
+	      keyValues[i] = keyValue = key.call(node, node.__data__, i, group) + "";
+
+	      if (nodeByKeyValue.has(keyValue)) {
+	        exit[i] = node;
+	      } else {
+	        nodeByKeyValue.set(keyValue, node);
+	      }
+	    }
+	  } // Compute the key for each datum.
+	  // If there a node associated with this key, join and add it to update.
+	  // If there is not (or the key is a duplicate), add it to enter.
+
+
+	  for (i = 0; i < dataLength; ++i) {
+	    keyValue = key.call(parent, data[i], i, data) + "";
+
+	    if (node = nodeByKeyValue.get(keyValue)) {
+	      update[i] = node;
+	      node.__data__ = data[i];
+	      nodeByKeyValue["delete"](keyValue);
+	    } else {
+	      enter[i] = new EnterNode(parent, data[i]);
+	    }
+	  } // Add any remaining nodes that were not bound to data to exit.
+
+
+	  for (i = 0; i < groupLength; ++i) {
+	    if ((node = group[i]) && nodeByKeyValue.get(keyValues[i]) === node) {
+	      exit[i] = node;
+	    }
+	  }
 	}
 
-	function Rgb(r, g, b, opacity) {
-	  this.r = +r;
-	  this.g = +g;
-	  this.b = +b;
-	  this.opacity = +opacity;
+	function datum(node) {
+	  return node.__data__;
 	}
 
-	define$1(Rgb, rgb, extend(Color, {
-	  brighter: function(k) {
-	    k = k == null ? brighter : Math.pow(brighter, k);
-	    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
-	  },
-	  darker: function(k) {
-	    k = k == null ? darker : Math.pow(darker, k);
-	    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
-	  },
-	  rgb: function() {
-	    return this;
-	  },
-	  displayable: function() {
-	    return (-0.5 <= this.r && this.r < 255.5)
-	        && (-0.5 <= this.g && this.g < 255.5)
-	        && (-0.5 <= this.b && this.b < 255.5)
-	        && (0 <= this.opacity && this.opacity <= 1);
-	  },
-	  hex: rgb_formatHex, // Deprecated! Use color.formatHex.
-	  formatHex: rgb_formatHex,
-	  formatRgb: rgb_formatRgb,
-	  toString: rgb_formatRgb
-	}));
+	function selection_data (value, key) {
+	  if (!arguments.length) return Array.from(this, datum);
+	  var bind = key ? bindKey : bindIndex,
+	      parents = this._parents,
+	      groups = this._groups;
+	  if (typeof value !== "function") value = constant$3(value);
 
-	function rgb_formatHex() {
-	  return "#" + hex$1(this.r) + hex$1(this.g) + hex$1(this.b);
-	}
+	  for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
+	    var parent = parents[j],
+	        group = groups[j],
+	        groupLength = group.length,
+	        data = array(value.call(parent, parent && parent.__data__, j, parents)),
+	        dataLength = data.length,
+	        enterGroup = enter[j] = new Array(dataLength),
+	        updateGroup = update[j] = new Array(dataLength),
+	        exitGroup = exit[j] = new Array(groupLength);
+	    bind(parent, group, enterGroup, updateGroup, exitGroup, data, key); // Now connect the enter nodes to their following update node, such that
+	    // appendChild can insert the materialized enter node before this node,
+	    // rather than at the end of the parent node.
 
-	function rgb_formatRgb() {
-	  var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
-	  return (a === 1 ? "rgb(" : "rgba(")
-	      + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", "
-	      + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", "
-	      + Math.max(0, Math.min(255, Math.round(this.b) || 0))
-	      + (a === 1 ? ")" : ", " + a + ")");
+	    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
+	      if (previous = enterGroup[i0]) {
+	        if (i0 >= i1) i1 = i0 + 1;
+
+	        while (!(next = updateGroup[i1]) && ++i1 < dataLength) {
+	        }
+
+	        previous._next = next || null;
+	      }
+	    }
+	  }
+
+	  update = new Selection$1(update, parents);
+	  update._enter = enter;
+	  update._exit = exit;
+	  return update;
 	}
 
-	function hex$1(value) {
-	  value = Math.max(0, Math.min(255, Math.round(value) || 0));
-	  return (value < 16 ? "0" : "") + value.toString(16);
+	function selection_exit () {
+	  return new Selection$1(this._exit || this._groups.map(sparse), this._parents);
 	}
 
-	function hsla(h, s, l, a) {
-	  if (a <= 0) { h = s = l = NaN; }
-	  else if (l <= 0 || l >= 1) { h = s = NaN; }
-	  else if (s <= 0) { h = NaN; }
-	  return new Hsl(h, s, l, a);
+	function selection_join (onenter, onupdate, onexit) {
+	  var enter = this.enter(),
+	      update = this,
+	      exit = this.exit();
+	  enter = typeof onenter === "function" ? onenter(enter) : enter.append(onenter + "");
+	  if (onupdate != null) update = onupdate(update);
+	  if (onexit == null) exit.remove();else onexit(exit);
+	  return enter && update ? enter.merge(update).order() : update;
 	}
 
-	function hslConvert(o) {
-	  if (o instanceof Hsl) { return new Hsl(o.h, o.s, o.l, o.opacity); }
-	  if (!(o instanceof Color)) { o = color(o); }
-	  if (!o) { return new Hsl; }
-	  if (o instanceof Hsl) { return o; }
-	  o = o.rgb();
-	  var r = o.r / 255,
-	      g = o.g / 255,
-	      b = o.b / 255,
-	      min = Math.min(r, g, b),
-	      max = Math.max(r, g, b),
-	      h = NaN,
-	      s = max - min,
-	      l = (max + min) / 2;
-	  if (s) {
-	    if (r === max) { h = (g - b) / s + (g < b) * 6; }
-	    else if (g === max) { h = (b - r) / s + 2; }
-	    else { h = (r - g) / s + 4; }
-	    s /= l < 0.5 ? max + min : 2 - max - min;
-	    h *= 60;
-	  } else {
-	    s = l > 0 && l < 1 ? 0 : h;
+	function selection_merge (selection) {
+	  if (!(selection instanceof Selection$1)) throw new Error("invalid merge");
+
+	  for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+	    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+	      if (node = group0[i] || group1[i]) {
+	        merge[i] = node;
+	      }
+	    }
 	  }
-	  return new Hsl(h, s, l, o.opacity);
-	}
 
-	function hsl(h, s, l, opacity) {
-	  return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
-	}
+	  for (; j < m0; ++j) {
+	    merges[j] = groups0[j];
+	  }
 
-	function Hsl(h, s, l, opacity) {
-	  this.h = +h;
-	  this.s = +s;
-	  this.l = +l;
-	  this.opacity = +opacity;
+	  return new Selection$1(merges, this._parents);
 	}
 
-	define$1(Hsl, hsl, extend(Color, {
-	  brighter: function(k) {
-	    k = k == null ? brighter : Math.pow(brighter, k);
-	    return new Hsl(this.h, this.s, this.l * k, this.opacity);
-	  },
-	  darker: function(k) {
-	    k = k == null ? darker : Math.pow(darker, k);
-	    return new Hsl(this.h, this.s, this.l * k, this.opacity);
-	  },
-	  rgb: function() {
-	    var h = this.h % 360 + (this.h < 0) * 360,
-	        s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
-	        l = this.l,
-	        m2 = l + (l < 0.5 ? l : 1 - l) * s,
-	        m1 = 2 * l - m2;
-	    return new Rgb(
-	      hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),
-	      hsl2rgb(h, m1, m2),
-	      hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),
-	      this.opacity
-	    );
-	  },
-	  displayable: function() {
-	    return (0 <= this.s && this.s <= 1 || isNaN(this.s))
-	        && (0 <= this.l && this.l <= 1)
-	        && (0 <= this.opacity && this.opacity <= 1);
-	  },
-	  formatHsl: function() {
-	    var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
-	    return (a === 1 ? "hsl(" : "hsla(")
-	        + (this.h || 0) + ", "
-	        + (this.s || 0) * 100 + "%, "
-	        + (this.l || 0) * 100 + "%"
-	        + (a === 1 ? ")" : ", " + a + ")");
+	function selection_order () {
+	  for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
+	    for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
+	      if (node = group[i]) {
+	        if (next && node.compareDocumentPosition(next) ^ 4) next.parentNode.insertBefore(node, next);
+	        next = node;
+	      }
+	    }
 	  }
-	}));
 
-	/* From FvD 13.37, CSS Color Module Level 3 */
-	function hsl2rgb(h, m1, m2) {
-	  return (h < 60 ? m1 + (m2 - m1) * h / 60
-	      : h < 180 ? m2
-	      : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60
-	      : m1) * 255;
+	  return this;
 	}
 
-	function constant$2(x) {
-	  return function() {
-	    return x;
-	  };
+	function selection_sort (compare) {
+	  if (!compare) compare = ascending;
+
+	  function compareNode(a, b) {
+	    return a && b ? compare(a.__data__, b.__data__) : !a - !b;
+	  }
+
+	  for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
+	      if (node = group[i]) {
+	        sortgroup[i] = node;
+	      }
+	    }
+
+	    sortgroup.sort(compareNode);
+	  }
+
+	  return new Selection$1(sortgroups, this._parents).order();
 	}
 
-	function linear(a, d) {
-	  return function(t) {
-	    return a + t * d;
-	  };
+	function ascending(a, b) {
+	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
 	}
 
-	function exponential(a, b, y) {
-	  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {
-	    return Math.pow(a + t * b, y);
-	  };
+	function selection_call () {
+	  var callback = arguments[0];
+	  arguments[0] = this;
+	  callback.apply(null, arguments);
+	  return this;
 	}
 
-	function gamma(y) {
-	  return (y = +y) === 1 ? nogamma : function(a, b) {
-	    return b - a ? exponential(a, b, y) : constant$2(isNaN(a) ? b : a);
-	  };
+	function selection_nodes () {
+	  return Array.from(this);
 	}
 
-	function nogamma(a, b) {
-	  var d = b - a;
-	  return d ? linear(a, d) : constant$2(isNaN(a) ? b : a);
+	function selection_node () {
+	  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+	    for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
+	      var node = group[i];
+	      if (node) return node;
+	    }
+	  }
+
+	  return null;
 	}
 
-	var d3_interpolateRgb = (function rgbGamma(y) {
-	  var color = gamma(y);
+	function selection_size () {
+	  var size = 0;
 
-	  function rgb$1(start, end) {
-	    var r = color((start = rgb(start)).r, (end = rgb(end)).r),
-	        g = color(start.g, end.g),
-	        b = color(start.b, end.b),
-	        opacity = nogamma(start.opacity, end.opacity);
-	    return function(t) {
-	      start.r = r(t);
-	      start.g = g(t);
-	      start.b = b(t);
-	      start.opacity = opacity(t);
-	      return start + "";
-	    };
-	  }
+	  var _iterator = _createForOfIteratorHelper(this),
+	      _step;
 
-	  rgb$1.gamma = rgbGamma;
+	  try {
+	    for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	      var node = _step.value;
+	      ++size;
+	    } // eslint-disable-line no-unused-vars
 
-	  return rgb$1;
-	})(1);
+	  } catch (err) {
+	    _iterator.e(err);
+	  } finally {
+	    _iterator.f();
+	  }
 
-	function numberArray(a, b) {
-	  if (!b) { b = []; }
-	  var n = a ? Math.min(b.length, a.length) : 0,
-	      c = b.slice(),
-	      i;
-	  return function(t) {
-	    for (i = 0; i < n; ++i) { c[i] = a[i] * (1 - t) + b[i] * t; }
-	    return c;
-	  };
+	  return size;
 	}
 
-	function isNumberArray(x) {
-	  return ArrayBuffer.isView(x) && !(x instanceof DataView);
+	function selection_empty () {
+	  return !this.node();
 	}
 
-	function genericArray(a, b) {
-	  var nb = b ? b.length : 0,
-	      na = a ? Math.min(nb, a.length) : 0,
-	      x = new Array(na),
-	      c = new Array(nb),
-	      i;
+	function selection_each (callback) {
+	  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+	    for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
+	      if (node = group[i]) callback.call(node, node.__data__, i, group);
+	    }
+	  }
 
-	  for (i = 0; i < na; ++i) { x[i] = interpolate(a[i], b[i]); }
-	  for (; i < nb; ++i) { c[i] = b[i]; }
+	  return this;
+	}
 
-	  return function(t) {
-	    for (i = 0; i < na; ++i) { c[i] = x[i](t); }
-	    return c;
+	function attrRemove$1(name) {
+	  return function () {
+	    this.removeAttribute(name);
 	  };
 	}
 
-	function date(a, b) {
-	  var d = new Date;
-	  return a = +a, b = +b, function(t) {
-	    return d.setTime(a * (1 - t) + b * t), d;
+	function attrRemoveNS$1(fullname) {
+	  return function () {
+	    this.removeAttributeNS(fullname.space, fullname.local);
 	  };
 	}
 
-	function d3_interpolateNumber(a, b) {
-	  return a = +a, b = +b, function(t) {
-	    return a * (1 - t) + b * t;
+	function attrConstant$1(name, value) {
+	  return function () {
+	    this.setAttribute(name, value);
 	  };
 	}
 
-	function object(a, b) {
-	  var i = {},
-	      c = {},
-	      k;
-
-	  if (a === null || typeof a !== "object") { a = {}; }
-	  if (b === null || typeof b !== "object") { b = {}; }
-
-	  for (k in b) {
-	    if (k in a) {
-	      i[k] = interpolate(a[k], b[k]);
-	    } else {
-	      c[k] = b[k];
-	    }
-	  }
-
-	  return function(t) {
-	    for (k in i) { c[k] = i[k](t); }
-	    return c;
+	function attrConstantNS$1(fullname, value) {
+	  return function () {
+	    this.setAttributeNS(fullname.space, fullname.local, value);
 	  };
 	}
 
-	var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
-	    reB = new RegExp(reA.source, "g");
-
-	function zero(b) {
-	  return function() {
-	    return b;
+	function attrFunction$1(name, value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (v == null) this.removeAttribute(name);else this.setAttribute(name, v);
 	  };
 	}
 
-	function one(b) {
-	  return function(t) {
-	    return b(t) + "";
+	function attrFunctionNS$1(fullname, value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (v == null) this.removeAttributeNS(fullname.space, fullname.local);else this.setAttributeNS(fullname.space, fullname.local, v);
 	  };
 	}
 
-	function interpolateString(a, b) {
-	  var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
-	      am, // current match in a
-	      bm, // current match in b
-	      bs, // string preceding current number in b, if any
-	      i = -1, // index in s
-	      s = [], // string constants and placeholders
-	      q = []; // number interpolators
-
-	  // Coerce inputs to strings.
-	  a = a + "", b = b + "";
-
-	  // Interpolate pairs of numbers in a & b.
-	  while ((am = reA.exec(a))
-	      && (bm = reB.exec(b))) {
-	    if ((bs = bm.index) > bi) { // a string precedes the next number in b
-	      bs = b.slice(bi, bs);
-	      if (s[i]) { s[i] += bs; } // coalesce with previous string
-	      else { s[++i] = bs; }
-	    }
-	    if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
-	      if (s[i]) { s[i] += bm; } // coalesce with previous string
-	      else { s[++i] = bm; }
-	    } else { // interpolate non-matching numbers
-	      s[++i] = null;
-	      q.push({i: i, x: d3_interpolateNumber(am, bm)});
-	    }
-	    bi = reB.lastIndex;
-	  }
+	function selection_attr (name, value) {
+	  var fullname = namespace(name);
 
-	  // Add remains of b.
-	  if (bi < b.length) {
-	    bs = b.slice(bi);
-	    if (s[i]) { s[i] += bs; } // coalesce with previous string
-	    else { s[++i] = bs; }
+	  if (arguments.length < 2) {
+	    var node = this.node();
+	    return fullname.local ? node.getAttributeNS(fullname.space, fullname.local) : node.getAttribute(fullname);
 	  }
 
-	  // Special optimization for only a single match.
-	  // Otherwise, interpolate each of the numbers and rejoin the string.
-	  return s.length < 2 ? (q[0]
-	      ? one(q[0].x)
-	      : zero(b))
-	      : (b = q.length, function(t) {
-	          for (var i = 0, o; i < b; ++i) { s[(o = q[i]).i] = o.x(t); }
-	          return s.join("");
-	        });
+	  return this.each((value == null ? fullname.local ? attrRemoveNS$1 : attrRemove$1 : typeof value === "function" ? fullname.local ? attrFunctionNS$1 : attrFunction$1 : fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, value));
 	}
 
-	function interpolate(a, b) {
-	  var t = typeof b, c;
-	  return b == null || t === "boolean" ? constant$2(b)
-	      : (t === "number" ? d3_interpolateNumber
-	      : t === "string" ? ((c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString)
-	      : b instanceof color ? d3_interpolateRgb
-	      : b instanceof Date ? date
-	      : isNumberArray(b) ? numberArray
-	      : Array.isArray(b) ? genericArray
-	      : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object
-	      : d3_interpolateNumber)(a, b);
+	function defaultView (node) {
+	  return node.ownerDocument && node.ownerDocument.defaultView // node is a Node
+	  || node.document && node // node is a Window
+	  || node.defaultView; // node is a Document
 	}
 
-	function interpolateRound(a, b) {
-	  return a = +a, b = +b, function(t) {
-	    return Math.round(a * (1 - t) + b * t);
+	function styleRemove$1(name) {
+	  return function () {
+	    this.style.removeProperty(name);
 	  };
 	}
 
-	var degrees$1 = 180 / Math.PI;
-
-	var identity$1 = {
-	  translateX: 0,
-	  translateY: 0,
-	  rotate: 0,
-	  skewX: 0,
-	  scaleX: 1,
-	  scaleY: 1
-	};
-
-	function decompose(a, b, c, d, e, f) {
-	  var scaleX, scaleY, skewX;
-	  if (scaleX = Math.sqrt(a * a + b * b)) { a /= scaleX, b /= scaleX; }
-	  if (skewX = a * c + b * d) { c -= a * skewX, d -= b * skewX; }
-	  if (scaleY = Math.sqrt(c * c + d * d)) { c /= scaleY, d /= scaleY, skewX /= scaleY; }
-	  if (a * d < b * c) { a = -a, b = -b, skewX = -skewX, scaleX = -scaleX; }
-	  return {
-	    translateX: e,
-	    translateY: f,
-	    rotate: Math.atan2(b, a) * degrees$1,
-	    skewX: Math.atan(skewX) * degrees$1,
-	    scaleX: scaleX,
-	    scaleY: scaleY
+	function styleConstant$1(name, value, priority) {
+	  return function () {
+	    this.style.setProperty(name, value, priority);
 	  };
 	}
 
-	var cssNode,
-	    cssRoot,
-	    cssView,
-	    svgNode;
-
-	function parseCss(value) {
-	  if (value === "none") { return identity$1; }
-	  if (!cssNode) { cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView; }
-	  cssNode.style.transform = value;
-	  value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform");
-	  cssRoot.removeChild(cssNode);
-	  value = value.slice(7, -1).split(",");
-	  return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);
+	function styleFunction$1(name, value, priority) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (v == null) this.style.removeProperty(name);else this.style.setProperty(name, v, priority);
+	  };
 	}
 
-	function parseSvg(value) {
-	  if (value == null) { return identity$1; }
-	  if (!svgNode) { svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g"); }
-	  svgNode.setAttribute("transform", value);
-	  if (!(value = svgNode.transform.baseVal.consolidate())) { return identity$1; }
-	  value = value.matrix;
-	  return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
+	function selection_style (name, value, priority) {
+	  return arguments.length > 1 ? this.each((value == null ? styleRemove$1 : typeof value === "function" ? styleFunction$1 : styleConstant$1)(name, value, priority == null ? "" : priority)) : styleValue(this.node(), name);
+	}
+	function styleValue(node, name) {
+	  return node.style.getPropertyValue(name) || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
 	}
 
-	function interpolateTransform(parse, pxComma, pxParen, degParen) {
-
-	  function pop(s) {
-	    return s.length ? s.pop() + " " : "";
-	  }
-
-	  function translate(xa, ya, xb, yb, s, q) {
-	    if (xa !== xb || ya !== yb) {
-	      var i = s.push("translate(", null, pxComma, null, pxParen);
-	      q.push({i: i - 4, x: d3_interpolateNumber(xa, xb)}, {i: i - 2, x: d3_interpolateNumber(ya, yb)});
-	    } else if (xb || yb) {
-	      s.push("translate(" + xb + pxComma + yb + pxParen);
-	    }
-	  }
-
-	  function rotate(a, b, s, q) {
-	    if (a !== b) {
-	      if (a - b > 180) { b += 360; } else if (b - a > 180) { a += 360; } // shortest path
-	      q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: d3_interpolateNumber(a, b)});
-	    } else if (b) {
-	      s.push(pop(s) + "rotate(" + b + degParen);
-	    }
-	  }
-
-	  function skewX(a, b, s, q) {
-	    if (a !== b) {
-	      q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: d3_interpolateNumber(a, b)});
-	    } else if (b) {
-	      s.push(pop(s) + "skewX(" + b + degParen);
-	    }
-	  }
-
-	  function scale(xa, ya, xb, yb, s, q) {
-	    if (xa !== xb || ya !== yb) {
-	      var i = s.push(pop(s) + "scale(", null, ",", null, ")");
-	      q.push({i: i - 4, x: d3_interpolateNumber(xa, xb)}, {i: i - 2, x: d3_interpolateNumber(ya, yb)});
-	    } else if (xb !== 1 || yb !== 1) {
-	      s.push(pop(s) + "scale(" + xb + "," + yb + ")");
-	    }
-	  }
-
-	  return function(a, b) {
-	    var s = [], // string constants and placeholders
-	        q = []; // number interpolators
-	    a = parse(a), b = parse(b);
-	    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
-	    rotate(a.rotate, b.rotate, s, q);
-	    skewX(a.skewX, b.skewX, s, q);
-	    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
-	    a = b = null; // gc
-	    return function(t) {
-	      var i = -1, n = q.length, o;
-	      while (++i < n) { s[(o = q[i]).i] = o.x(t); }
-	      return s.join("");
-	    };
+	function propertyRemove(name) {
+	  return function () {
+	    delete this[name];
 	  };
 	}
 
-	var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
-	var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
-
-	var rho = Math.SQRT2,
-	    rho2 = 2,
-	    rho4 = 4,
-	    epsilon2$1 = 1e-12;
-
-	function cosh(x) {
-	  return ((x = Math.exp(x)) + 1 / x) / 2;
+	function propertyConstant(name, value) {
+	  return function () {
+	    this[name] = value;
+	  };
 	}
 
-	function sinh(x) {
-	  return ((x = Math.exp(x)) - 1 / x) / 2;
+	function propertyFunction(name, value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (v == null) delete this[name];else this[name] = v;
+	  };
 	}
 
-	function tanh(x) {
-	  return ((x = Math.exp(2 * x)) - 1) / (x + 1);
+	function selection_property (name, value) {
+	  return arguments.length > 1 ? this.each((value == null ? propertyRemove : typeof value === "function" ? propertyFunction : propertyConstant)(name, value)) : this.node()[name];
 	}
 
-	// p0 = [ux0, uy0, w0]
-	// p1 = [ux1, uy1, w1]
-	function interpolateZoom(p0, p1) {
-	  var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],
-	      ux1 = p1[0], uy1 = p1[1], w1 = p1[2],
-	      dx = ux1 - ux0,
-	      dy = uy1 - uy0,
-	      d2 = dx * dx + dy * dy,
-	      i,
-	      S;
-
-	  // Special case for u0 ≅ u1.
-	  if (d2 < epsilon2$1) {
-	    S = Math.log(w1 / w0) / rho;
-	    i = function(t) {
-	      return [
-	        ux0 + t * dx,
-	        uy0 + t * dy,
-	        w0 * Math.exp(rho * t * S)
-	      ];
-	    };
-	  }
-
-	  // General case.
-	  else {
-	    var d1 = Math.sqrt(d2),
-	        b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
-	        b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
-	        r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
-	        r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
-	    S = (r1 - r0) / rho;
-	    i = function(t) {
-	      var s = t * S,
-	          coshr0 = cosh(r0),
-	          u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
-	      return [
-	        ux0 + u * dx,
-	        uy0 + u * dy,
-	        w0 * coshr0 / cosh(rho * s + r0)
-	      ];
-	    };
-	  }
-
-	  i.duration = S * 1000;
-
-	  return i;
+	function classArray(string) {
+	  return string.trim().split(/^|\s+/);
 	}
 
-	function d3_quantize(interpolator, n) {
-	  var samples = new Array(n);
-	  for (var i = 0; i < n; ++i) { samples[i] = interpolator(i / (n - 1)); }
-	  return samples;
+	function classList(node) {
+	  return node.classList || new ClassList(node);
 	}
 
-	var frame = 0, // is an animation frame pending?
-	    timeout = 0, // is a timeout pending?
-	    interval = 0, // are any timers active?
-	    pokeDelay = 1000, // how frequently we check for clock skew
-	    taskHead,
-	    taskTail,
-	    clockLast = 0,
-	    clockNow = 0,
-	    clockSkew = 0,
-	    clock = typeof performance === "object" && performance.now ? performance : Date,
-	    setFrame = typeof window === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };
-
-	function now() {
-	  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
+	function ClassList(node) {
+	  this._node = node;
+	  this._names = classArray(node.getAttribute("class") || "");
 	}
 
-	function clearNow() {
-	  clockNow = 0;
-	}
+	ClassList.prototype = {
+	  add: function add(name) {
+	    var i = this._names.indexOf(name);
 
-	function Timer() {
-	  this._call =
-	  this._time =
-	  this._next = null;
-	}
+	    if (i < 0) {
+	      this._names.push(name);
 
-	Timer.prototype = timer.prototype = {
-	  constructor: Timer,
-	  restart: function(callback, delay, time) {
-	    if (typeof callback !== "function") { throw new TypeError("callback is not a function"); }
-	    time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
-	    if (!this._next && taskTail !== this) {
-	      if (taskTail) { taskTail._next = this; }
-	      else { taskHead = this; }
-	      taskTail = this;
+	      this._node.setAttribute("class", this._names.join(" "));
 	    }
-	    this._call = callback;
-	    this._time = time;
-	    sleep();
 	  },
-	  stop: function() {
-	    if (this._call) {
-	      this._call = null;
-	      this._time = Infinity;
-	      sleep();
+	  remove: function remove(name) {
+	    var i = this._names.indexOf(name);
+
+	    if (i >= 0) {
+	      this._names.splice(i, 1);
+
+	      this._node.setAttribute("class", this._names.join(" "));
 	    }
+	  },
+	  contains: function contains(name) {
+	    return this._names.indexOf(name) >= 0;
 	  }
 	};
 
-	function timer(callback, delay, time) {
-	  var t = new Timer;
-	  t.restart(callback, delay, time);
-	  return t;
-	}
+	function classedAdd(node, names) {
+	  var list = classList(node),
+	      i = -1,
+	      n = names.length;
 
-	function timerFlush() {
-	  now(); // Get the current time, if not already set.
-	  ++frame; // Pretend we’ve set an alarm, if we haven’t already.
-	  var t = taskHead, e;
-	  while (t) {
-	    if ((e = clockNow - t._time) >= 0) { t._call.call(null, e); }
-	    t = t._next;
+	  while (++i < n) {
+	    list.add(names[i]);
 	  }
-	  --frame;
 	}
 
-	function wake() {
-	  clockNow = (clockLast = clock.now()) + clockSkew;
-	  frame = timeout = 0;
-	  try {
-	    timerFlush();
-	  } finally {
-	    frame = 0;
-	    nap();
-	    clockNow = 0;
+	function classedRemove(node, names) {
+	  var list = classList(node),
+	      i = -1,
+	      n = names.length;
+
+	  while (++i < n) {
+	    list.remove(names[i]);
 	  }
 	}
 
-	function poke() {
-	  var now = clock.now(), delay = now - clockLast;
-	  if (delay > pokeDelay) { clockSkew -= delay, clockLast = now; }
+	function classedTrue(names) {
+	  return function () {
+	    classedAdd(this, names);
+	  };
 	}
 
-	function nap() {
-	  var t0, t1 = taskHead, t2, time = Infinity;
-	  while (t1) {
-	    if (t1._call) {
-	      if (time > t1._time) { time = t1._time; }
-	      t0 = t1, t1 = t1._next;
-	    } else {
-	      t2 = t1._next, t1._next = null;
-	      t1 = t0 ? t0._next = t2 : taskHead = t2;
-	    }
-	  }
-	  taskTail = t0;
-	  sleep(time);
+	function classedFalse(names) {
+	  return function () {
+	    classedRemove(this, names);
+	  };
 	}
 
-	function sleep(time) {
-	  if (frame) { return; } // Soonest alarm already set, or will be.
-	  if (timeout) { timeout = clearTimeout(timeout); }
-	  var delay = time - clockNow; // Strictly less than if we recomputed clockNow.
-	  if (delay > 24) {
-	    if (time < Infinity) { timeout = setTimeout(wake, time - clock.now() - clockSkew); }
-	    if (interval) { interval = clearInterval(interval); }
-	  } else {
-	    if (!interval) { clockLast = clock.now(), interval = setInterval(poke, pokeDelay); }
-	    frame = 1, setFrame(wake);
-	  }
+	function classedFunction(names, value) {
+	  return function () {
+	    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
+	  };
 	}
 
-	function d3_timeout(callback, delay, time) {
-	  var t = new Timer;
-	  delay = delay == null ? 0 : +delay;
-	  t.restart(function(elapsed) {
-	    t.stop();
-	    callback(elapsed + delay);
-	  }, delay, time);
-	  return t;
-	}
+	function selection_classed (name, value) {
+	  var names = classArray(name + "");
 
-	var emptyOn = dispatch("start", "end", "cancel", "interrupt");
-	var emptyTween = [];
+	  if (arguments.length < 2) {
+	    var list = classList(this.node()),
+	        i = -1,
+	        n = names.length;
 
-	var CREATED = 0;
-	var SCHEDULED = 1;
-	var STARTING = 2;
-	var STARTED = 3;
-	var RUNNING = 4;
-	var ENDING = 5;
-	var ENDED = 6;
+	    while (++i < n) {
+	      if (!list.contains(names[i])) return false;
+	    }
 
-	function schedule(node, name, id, index, group, timing) {
-	  var schedules = node.__transition;
-	  if (!schedules) { node.__transition = {}; }
-	  else if (id in schedules) { return; }
-	  create$7(node, id, {
-	    name: name,
-	    index: index, // For context during callback.
-	    group: group, // For context during callback.
-	    on: emptyOn,
-	    tween: emptyTween,
-	    time: timing.time,
-	    delay: timing.delay,
-	    duration: timing.duration,
-	    ease: timing.ease,
-	    timer: null,
-	    state: CREATED
-	  });
-	}
+	    return true;
+	  }
 
-	function init(node, id) {
-	  var schedule = get$2(node, id);
-	  if (schedule.state > CREATED) { throw new Error("too late; already scheduled"); }
-	  return schedule;
+	  return this.each((typeof value === "function" ? classedFunction : value ? classedTrue : classedFalse)(names, value));
 	}
 
-	function set$1(node, id) {
-	  var schedule = get$2(node, id);
-	  if (schedule.state > STARTED) { throw new Error("too late; already running"); }
-	  return schedule;
+	function textRemove() {
+	  this.textContent = "";
 	}
 
-	function get$2(node, id) {
-	  var schedule = node.__transition;
-	  if (!schedule || !(schedule = schedule[id])) { throw new Error("transition not found"); }
-	  return schedule;
+	function textConstant$1(value) {
+	  return function () {
+	    this.textContent = value;
+	  };
 	}
 
-	function create$7(node, id, self) {
-	  var schedules = node.__transition,
-	      tween;
-
-	  // Initialize the self timer when the transition is created.
-	  // Note the actual delay is not known until the first callback!
-	  schedules[id] = self;
-	  self.timer = timer(schedule, 0, self.time);
-
-	  function schedule(elapsed) {
-	    self.state = SCHEDULED;
-	    self.timer.restart(start, self.delay, self.time);
+	function textFunction$1(value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    this.textContent = v == null ? "" : v;
+	  };
+	}
 
-	    // If the elapsed delay is less than our first sleep, start immediately.
-	    if (self.delay <= elapsed) { start(elapsed - self.delay); }
-	  }
+	function selection_text (value) {
+	  return arguments.length ? this.each(value == null ? textRemove : (typeof value === "function" ? textFunction$1 : textConstant$1)(value)) : this.node().textContent;
+	}
 
-	  function start(elapsed) {
-	    var i, j, n, o;
+	function htmlRemove() {
+	  this.innerHTML = "";
+	}
 
-	    // If the state is not SCHEDULED, then we previously errored on start.
-	    if (self.state !== SCHEDULED) { return stop(); }
+	function htmlConstant(value) {
+	  return function () {
+	    this.innerHTML = value;
+	  };
+	}
 
-	    for (i in schedules) {
-	      o = schedules[i];
-	      if (o.name !== self.name) { continue; }
+	function htmlFunction(value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    this.innerHTML = v == null ? "" : v;
+	  };
+	}
 
-	      // While this element already has a starting transition during this frame,
-	      // defer starting an interrupting transition until that transition has a
-	      // chance to tick (and possibly end); see d3/d3-transition#54!
-	      if (o.state === STARTED) { return d3_timeout(start); }
+	function selection_html (value) {
+	  return arguments.length ? this.each(value == null ? htmlRemove : (typeof value === "function" ? htmlFunction : htmlConstant)(value)) : this.node().innerHTML;
+	}
 
-	      // Interrupt the active transition, if any.
-	      if (o.state === RUNNING) {
-	        o.state = ENDED;
-	        o.timer.stop();
-	        o.on.call("interrupt", node, node.__data__, o.index, o.group);
-	        delete schedules[i];
-	      }
+	function raise() {
+	  if (this.nextSibling) this.parentNode.appendChild(this);
+	}
 
-	      // Cancel any pre-empted transitions.
-	      else if (+i < id) {
-	        o.state = ENDED;
-	        o.timer.stop();
-	        o.on.call("cancel", node, node.__data__, o.index, o.group);
-	        delete schedules[i];
-	      }
-	    }
+	function selection_raise () {
+	  return this.each(raise);
+	}
 
-	    // Defer the first tick to end of the current frame; see d3/d3#1576.
-	    // Note the transition may be canceled after start and before the first tick!
-	    // Note this must be scheduled before the start event; see d3/d3-transition#16!
-	    // Assuming this is successful, subsequent callbacks go straight to tick.
-	    d3_timeout(function() {
-	      if (self.state === STARTED) {
-	        self.state = RUNNING;
-	        self.timer.restart(tick, self.delay, self.time);
-	        tick(elapsed);
-	      }
-	    });
+	function lower() {
+	  if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
+	}
 
-	    // Dispatch the start event.
-	    // Note this must be done before the tween are initialized.
-	    self.state = STARTING;
-	    self.on.call("start", node, node.__data__, self.index, self.group);
-	    if (self.state !== STARTING) { return; } // interrupted
-	    self.state = STARTED;
+	function selection_lower () {
+	  return this.each(lower);
+	}
 
-	    // Initialize the tween, deleting null tween.
-	    tween = new Array(n = self.tween.length);
-	    for (i = 0, j = -1; i < n; ++i) {
-	      if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
-	        tween[++j] = o;
-	      }
-	    }
-	    tween.length = j + 1;
-	  }
+	function selection_append (name) {
+	  var create = typeof name === "function" ? name : creator(name);
+	  return this.select(function () {
+	    return this.appendChild(create.apply(this, arguments));
+	  });
+	}
 
-	  function tick(elapsed) {
-	    var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
-	        i = -1,
-	        n = tween.length;
+	function constantNull() {
+	  return null;
+	}
 
-	    while (++i < n) {
-	      tween[i].call(node, t);
-	    }
+	function selection_insert (name, before) {
+	  var create = typeof name === "function" ? name : creator(name),
+	      select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
+	  return this.select(function () {
+	    return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
+	  });
+	}
 
-	    // Dispatch the end event.
-	    if (self.state === ENDING) {
-	      self.on.call("end", node, node.__data__, self.index, self.group);
-	      stop();
-	    }
-	  }
+	function remove$7() {
+	  var parent = this.parentNode;
+	  if (parent) parent.removeChild(this);
+	}
 
-	  function stop() {
-	    self.state = ENDED;
-	    self.timer.stop();
-	    delete schedules[id];
-	    for (var i in schedules) { return; } // eslint-disable-line no-unused-vars
-	    delete node.__transition;
-	  }
+	function selection_remove () {
+	  return this.each(remove$7);
 	}
 
-	function interrupt(node, name) {
-	  var schedules = node.__transition,
-	      schedule,
-	      active,
-	      empty = true,
-	      i;
+	function selection_cloneShallow() {
+	  var clone = this.cloneNode(false),
+	      parent = this.parentNode;
+	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
+	}
 
-	  if (!schedules) { return; }
+	function selection_cloneDeep() {
+	  var clone = this.cloneNode(true),
+	      parent = this.parentNode;
+	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
+	}
 
-	  name = name == null ? null : name + "";
+	function selection_clone (deep) {
+	  return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
+	}
 
-	  for (i in schedules) {
-	    if ((schedule = schedules[i]).name !== name) { empty = false; continue; }
-	    active = schedule.state > STARTING && schedule.state < ENDING;
-	    schedule.state = ENDED;
-	    schedule.timer.stop();
-	    schedule.on.call(active ? "interrupt" : "cancel", node, node.__data__, schedule.index, schedule.group);
-	    delete schedules[i];
-	  }
+	function selection_datum (value) {
+	  return arguments.length ? this.property("__data__", value) : this.node().__data__;
+	}
 
-	  if (empty) { delete node.__transition; }
+	function contextListener(listener) {
+	  return function (event) {
+	    listener.call(this, event, this.__data__);
+	  };
 	}
 
-	function selection_interrupt(name) {
-	  return this.each(function() {
-	    interrupt(this, name);
+	function parseTypenames(typenames) {
+	  return typenames.trim().split(/^|\s+/).map(function (t) {
+	    var name = "",
+	        i = t.indexOf(".");
+	    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+	    return {
+	      type: t,
+	      name: name
+	    };
 	  });
 	}
 
-	function tweenRemove(id, name) {
-	  var tween0, tween1;
-	  return function() {
-	    var schedule = set$1(this, id),
-	        tween = schedule.tween;
+	function onRemove(typename) {
+	  return function () {
+	    var on = this.__on;
+	    if (!on) return;
 
-	    // If this node shared tween with the previous node,
-	    // just assign the updated shared tween and we’re done!
-	    // Otherwise, copy-on-write.
-	    if (tween !== tween0) {
-	      tween1 = tween0 = tween;
-	      for (var i = 0, n = tween1.length; i < n; ++i) {
-	        if (tween1[i].name === name) {
-	          tween1 = tween1.slice();
-	          tween1.splice(i, 1);
-	          break;
-	        }
+	    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
+	      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
+	        this.removeEventListener(o.type, o.listener, o.options);
+	      } else {
+	        on[++i] = o;
 	      }
 	    }
 
-	    schedule.tween = tween1;
+	    if (++i) on.length = i;else delete this.__on;
 	  };
 	}
 
-	function tweenFunction(id, name, value) {
-	  var tween0, tween1;
-	  if (typeof value !== "function") { throw new Error; }
-	  return function() {
-	    var schedule = set$1(this, id),
-	        tween = schedule.tween;
-
-	    // If this node shared tween with the previous node,
-	    // just assign the updated shared tween and we’re done!
-	    // Otherwise, copy-on-write.
-	    if (tween !== tween0) {
-	      tween1 = (tween0 = tween).slice();
-	      for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {
-	        if (tween1[i].name === name) {
-	          tween1[i] = t;
-	          break;
-	        }
+	function onAdd(typename, value, options) {
+	  return function () {
+	    var on = this.__on,
+	        o,
+	        listener = contextListener(value);
+	    if (on) for (var j = 0, m = on.length; j < m; ++j) {
+	      if ((o = on[j]).type === typename.type && o.name === typename.name) {
+	        this.removeEventListener(o.type, o.listener, o.options);
+	        this.addEventListener(o.type, o.listener = listener, o.options = options);
+	        o.value = value;
+	        return;
 	      }
-	      if (i === n) { tween1.push(t); }
 	    }
-
-	    schedule.tween = tween1;
+	    this.addEventListener(typename.type, listener, options);
+	    o = {
+	      type: typename.type,
+	      name: typename.name,
+	      value: value,
+	      listener: listener,
+	      options: options
+	    };
+	    if (!on) this.__on = [o];else on.push(o);
 	  };
 	}
 
-	function transition_tween(name, value) {
-	  var id = this._id;
-
-	  name += "";
+	function selection_on (typename, value, options) {
+	  var typenames = parseTypenames(typename + ""),
+	      i,
+	      n = typenames.length,
+	      t;
 
 	  if (arguments.length < 2) {
-	    var tween = get$2(this.node(), id).tween;
-	    for (var i = 0, n = tween.length, t; i < n; ++i) {
-	      if ((t = tween[i]).name === name) {
-	        return t.value;
+	    var on = this.node().__on;
+
+	    if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
+	      for (i = 0, o = on[j]; i < n; ++i) {
+	        if ((t = typenames[i]).type === o.type && t.name === o.name) {
+	          return o.value;
+	        }
 	      }
 	    }
-	    return null;
+	    return;
 	  }
 
-	  return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
-	}
-
-	function tweenValue(transition, name, value) {
-	  var id = transition._id;
+	  on = value ? onAdd : onRemove;
 
-	  transition.each(function() {
-	    var schedule = set$1(this, id);
-	    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
-	  });
+	  for (i = 0; i < n; ++i) {
+	    this.each(on(typenames[i], value, options));
+	  }
 
-	  return function(node) {
-	    return get$2(node, id).value[name];
-	  };
+	  return this;
 	}
 
-	function interpolate$1(a, b) {
-	  var c;
-	  return (typeof b === "number" ? d3_interpolateNumber
-	      : b instanceof color ? d3_interpolateRgb
-	      : (c = color(b)) ? (b = c, d3_interpolateRgb)
-	      : interpolateString)(a, b);
-	}
+	function dispatchEvent(node, type, params) {
+	  var window = defaultView(node),
+	      event = window.CustomEvent;
 
-	function attrRemove$1(name) {
-	  return function() {
-	    this.removeAttribute(name);
-	  };
-	}
+	  if (typeof event === "function") {
+	    event = new event(type, params);
+	  } else {
+	    event = window.document.createEvent("Event");
+	    if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;else event.initEvent(type, false, false);
+	  }
 
-	function attrRemoveNS$1(fullname) {
-	  return function() {
-	    this.removeAttributeNS(fullname.space, fullname.local);
-	  };
+	  node.dispatchEvent(event);
 	}
 
-	function attrConstant$1(name, interpolate, value1) {
-	  var string00,
-	      string1 = value1 + "",
-	      interpolate0;
-	  return function() {
-	    var string0 = this.getAttribute(name);
-	    return string0 === string1 ? null
-	        : string0 === string00 ? interpolate0
-	        : interpolate0 = interpolate(string00 = string0, value1);
+	function dispatchConstant(type, params) {
+	  return function () {
+	    return dispatchEvent(this, type, params);
 	  };
 	}
 
-	function attrConstantNS$1(fullname, interpolate, value1) {
-	  var string00,
-	      string1 = value1 + "",
-	      interpolate0;
-	  return function() {
-	    var string0 = this.getAttributeNS(fullname.space, fullname.local);
-	    return string0 === string1 ? null
-	        : string0 === string00 ? interpolate0
-	        : interpolate0 = interpolate(string00 = string0, value1);
+	function dispatchFunction(type, params) {
+	  return function () {
+	    return dispatchEvent(this, type, params.apply(this, arguments));
 	  };
 	}
 
-	function attrFunction$1(name, interpolate, value) {
-	  var string00,
-	      string10,
-	      interpolate0;
-	  return function() {
-	    var string0, value1 = value(this), string1;
-	    if (value1 == null) { return void this.removeAttribute(name); }
-	    string0 = this.getAttribute(name);
-	    string1 = value1 + "";
-	    return string0 === string1 ? null
-	        : string0 === string00 && string1 === string10 ? interpolate0
-	        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
-	  };
+	function selection_dispatch (type, params) {
+	  return this.each((typeof params === "function" ? dispatchFunction : dispatchConstant)(type, params));
 	}
 
-	function attrFunctionNS$1(fullname, interpolate, value) {
-	  var string00,
-	      string10,
-	      interpolate0;
-	  return function() {
-	    var string0, value1 = value(this), string1;
-	    if (value1 == null) { return void this.removeAttributeNS(fullname.space, fullname.local); }
-	    string0 = this.getAttributeNS(fullname.space, fullname.local);
-	    string1 = value1 + "";
-	    return string0 === string1 ? null
-	        : string0 === string00 && string1 === string10 ? interpolate0
-	        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
-	  };
-	}
+	var _marked$1 = /*#__PURE__*/regeneratorRuntime.mark(_callee);
 
-	function transition_attr(name, value) {
-	  var fullname = namespace(name), i = fullname === "transform" ? interpolateTransformSvg : interpolate$1;
-	  return this.attrTween(name, typeof value === "function"
-	      ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value))
-	      : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname)
-	      : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value));
-	}
+	function _callee() {
+	  var groups, j, m, group, i, n, node;
+	  return regeneratorRuntime.wrap(function _callee$(_context) {
+	    while (1) {
+	      switch (_context.prev = _context.next) {
+	        case 0:
+	          groups = this._groups, j = 0, m = groups.length;
 
-	function attrInterpolate(name, i) {
-	  return function(t) {
-	    this.setAttribute(name, i.call(this, t));
-	  };
-	}
+	        case 1:
+	          if (!(j < m)) {
+	            _context.next = 13;
+	            break;
+	          }
 
-	function attrInterpolateNS(fullname, i) {
-	  return function(t) {
-	    this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));
-	  };
-	}
+	          group = groups[j], i = 0, n = group.length;
 
-	function attrTweenNS(fullname, value) {
-	  var t0, i0;
-	  function tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) { t0 = (i0 = i) && attrInterpolateNS(fullname, i); }
-	    return t0;
-	  }
-	  tween._value = value;
-	  return tween;
-	}
+	        case 3:
+	          if (!(i < n)) {
+	            _context.next = 10;
+	            break;
+	          }
 
-	function attrTween(name, value) {
-	  var t0, i0;
-	  function tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) { t0 = (i0 = i) && attrInterpolate(name, i); }
-	    return t0;
-	  }
-	  tween._value = value;
-	  return tween;
-	}
+	          if (!(node = group[i])) {
+	            _context.next = 7;
+	            break;
+	          }
 
-	function transition_attrTween(name, value) {
-	  var key = "attr." + name;
-	  if (arguments.length < 2) { return (key = this.tween(key)) && key._value; }
-	  if (value == null) { return this.tween(key, null); }
-	  if (typeof value !== "function") { throw new Error; }
-	  var fullname = namespace(name);
-	  return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
-	}
+	          _context.next = 7;
+	          return node;
 
-	function delayFunction(id, value) {
-	  return function() {
-	    init(this, id).delay = +value.apply(this, arguments);
-	  };
-	}
+	        case 7:
+	          ++i;
+	          _context.next = 3;
+	          break;
 
-	function delayConstant(id, value) {
-	  return value = +value, function() {
-	    init(this, id).delay = value;
-	  };
-	}
+	        case 10:
+	          ++j;
+	          _context.next = 1;
+	          break;
 
-	function transition_delay(value) {
-	  var id = this._id;
+	        case 13:
+	        case "end":
+	          return _context.stop();
+	      }
+	    }
+	  }, _marked$1, this);
+	}
 
-	  return arguments.length
-	      ? this.each((typeof value === "function"
-	          ? delayFunction
-	          : delayConstant)(id, value))
-	      : get$2(this.node(), id).delay;
+	var root$1 = [null];
+	function Selection$1(groups, parents) {
+	  this._groups = groups;
+	  this._parents = parents;
 	}
 
-	function durationFunction(id, value) {
-	  return function() {
-	    set$1(this, id).duration = +value.apply(this, arguments);
-	  };
+	function selection() {
+	  return new Selection$1([[document.documentElement]], root$1);
 	}
 
-	function durationConstant(id, value) {
-	  return value = +value, function() {
-	    set$1(this, id).duration = value;
-	  };
+	function selection_selection() {
+	  return this;
 	}
 
-	function transition_duration(value) {
-	  var id = this._id;
-
-	  return arguments.length
-	      ? this.each((typeof value === "function"
-	          ? durationFunction
-	          : durationConstant)(id, value))
-	      : get$2(this.node(), id).duration;
-	}
-
-	function easeConstant(id, value) {
-	  if (typeof value !== "function") { throw new Error; }
-	  return function() {
-	    set$1(this, id).ease = value;
-	  };
-	}
-
-	function transition_ease(value) {
-	  var id = this._id;
+	Selection$1.prototype = selection.prototype = _defineProperty({
+	  constructor: Selection$1,
+	  select: selection_select,
+	  selectAll: selection_selectAll,
+	  selectChild: selection_selectChild,
+	  selectChildren: selection_selectChildren,
+	  filter: selection_filter,
+	  data: selection_data,
+	  enter: selection_enter,
+	  exit: selection_exit,
+	  join: selection_join,
+	  merge: selection_merge,
+	  selection: selection_selection,
+	  order: selection_order,
+	  sort: selection_sort,
+	  call: selection_call,
+	  nodes: selection_nodes,
+	  node: selection_node,
+	  size: selection_size,
+	  empty: selection_empty,
+	  each: selection_each,
+	  attr: selection_attr,
+	  style: selection_style,
+	  property: selection_property,
+	  classed: selection_classed,
+	  text: selection_text,
+	  html: selection_html,
+	  raise: selection_raise,
+	  lower: selection_lower,
+	  append: selection_append,
+	  insert: selection_insert,
+	  remove: selection_remove,
+	  clone: selection_clone,
+	  datum: selection_datum,
+	  on: selection_on,
+	  dispatch: selection_dispatch
+	}, Symbol.iterator, _callee);
 
-	  return arguments.length
-	      ? this.each(easeConstant(id, value))
-	      : get$2(this.node(), id).ease;
+	function select (selector) {
+	  return typeof selector === "string" ? new Selection$1([[document.querySelector(selector)]], [document.documentElement]) : new Selection$1([[selector]], root$1);
 	}
 
-	function transition_filter(match) {
-	  if (typeof match !== "function") { match = matcher(match); }
+	function sourceEvent (event) {
+	  var sourceEvent;
 
-	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
-	      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
-	        subgroup.push(node);
-	      }
-	    }
+	  while (sourceEvent = event.sourceEvent) {
+	    event = sourceEvent;
 	  }
 
-	  return new Transition(subgroups, this._parents, this._name, this._id);
+	  return event;
 	}
 
-	function transition_merge(transition) {
-	  if (transition._id !== this._id) { throw new Error; }
+	function pointer (event, node) {
+	  event = sourceEvent(event);
+	  if (node === undefined) node = event.currentTarget;
 
-	  for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
-	    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
-	      if (node = group0[i] || group1[i]) {
-	        merge[i] = node;
-	      }
+	  if (node) {
+	    var svg = node.ownerSVGElement || node;
+
+	    if (svg.createSVGPoint) {
+	      var point = svg.createSVGPoint();
+	      point.x = event.clientX, point.y = event.clientY;
+	      point = point.matrixTransform(node.getScreenCTM().inverse());
+	      return [point.x, point.y];
 	    }
-	  }
 
-	  for (; j < m0; ++j) {
-	    merges[j] = groups0[j];
+	    if (node.getBoundingClientRect) {
+	      var rect = node.getBoundingClientRect();
+	      return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
+	    }
 	  }
 
-	  return new Transition(merges, this._parents, this._name, this._id);
-	}
-
-	function start(name) {
-	  return (name + "").trim().split(/^|\s+/).every(function(t) {
-	    var i = t.indexOf(".");
-	    if (i >= 0) { t = t.slice(0, i); }
-	    return !t || t === "start";
-	  });
-	}
-
-	function onFunction(id, name, listener) {
-	  var on0, on1, sit = start(name) ? init : set$1;
-	  return function() {
-	    var schedule = sit(this, id),
-	        on = schedule.on;
-
-	    // If this node shared a dispatch with the previous node,
-	    // just assign the updated shared dispatch and we’re done!
-	    // Otherwise, copy-on-write.
-	    if (on !== on0) { (on1 = (on0 = on).copy()).on(name, listener); }
-
-	    schedule.on = on1;
-	  };
+	  return [event.pageX, event.pageY];
 	}
 
-	function transition_on(name, listener) {
-	  var id = this._id;
-
-	  return arguments.length < 2
-	      ? get$2(this.node(), id).on.on(name)
-	      : this.each(onFunction(id, name, listener));
+	function selectAll (selector) {
+	  return typeof selector === "string" ? new Selection$1([document.querySelectorAll(selector)], [document.documentElement]) : new Selection$1([selector == null ? [] : array(selector)], root$1);
 	}
 
-	function removeFunction(id) {
-	  return function() {
-	    var parent = this.parentNode;
-	    for (var i in this.__transition) { if (+i !== id) { return; } }
-	    if (parent) { parent.removeChild(this); }
-	  };
+	function nopropagation$1(event) {
+	  event.stopImmediatePropagation();
 	}
-
-	function transition_remove() {
-	  return this.on("end.remove", removeFunction(this._id));
+	function noevent$1 (event) {
+	  event.preventDefault();
+	  event.stopImmediatePropagation();
 	}
 
-	function transition_select(select) {
-	  var name = this._name,
-	      id = this._id;
-
-	  if (typeof select !== "function") { select = selector(select); }
+	function dragDisable (view) {
+	  var root = view.document.documentElement,
+	      selection = select(view).on("dragstart.drag", noevent$1, true);
 
-	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
-	      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
-	        if ("__data__" in node) { subnode.__data__ = node.__data__; }
-	        subgroup[i] = subnode;
-	        schedule(subgroup[i], name, id, i, subgroup, get$2(node, id));
-	      }
-	    }
+	  if ("onselectstart" in root) {
+	    selection.on("selectstart.drag", noevent$1, true);
+	  } else {
+	    root.__noselect = root.style.MozUserSelect;
+	    root.style.MozUserSelect = "none";
 	  }
-
-	  return new Transition(subgroups, this._parents, name, id);
 	}
+	function yesdrag(view, noclick) {
+	  var root = view.document.documentElement,
+	      selection = select(view).on("dragstart.drag", null);
 
-	function transition_selectAll(select) {
-	  var name = this._name,
-	      id = this._id;
-
-	  if (typeof select !== "function") { select = selectorAll(select); }
-
-	  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-	      if (node = group[i]) {
-	        for (var children = select.call(node, node.__data__, i, group), child, inherit = get$2(node, id), k = 0, l = children.length; k < l; ++k) {
-	          if (child = children[k]) {
-	            schedule(child, name, id, k, children, inherit);
-	          }
-	        }
-	        subgroups.push(children);
-	        parents.push(node);
-	      }
-	    }
+	  if (noclick) {
+	    selection.on("click.drag", noevent$1, true);
+	    setTimeout(function () {
+	      selection.on("click.drag", null);
+	    }, 0);
 	  }
 
-	  return new Transition(subgroups, parents, name, id);
-	}
-
-	var Selection$1 = selection.prototype.constructor;
-
-	function transition_selection() {
-	  return new Selection$1(this._groups, this._parents);
-	}
-
-	function styleNull(name, interpolate) {
-	  var string00,
-	      string10,
-	      interpolate0;
-	  return function() {
-	    var string0 = styleValue(this, name),
-	        string1 = (this.style.removeProperty(name), styleValue(this, name));
-	    return string0 === string1 ? null
-	        : string0 === string00 && string1 === string10 ? interpolate0
-	        : interpolate0 = interpolate(string00 = string0, string10 = string1);
-	  };
-	}
-
-	function styleRemove$1(name) {
-	  return function() {
-	    this.style.removeProperty(name);
-	  };
+	  if ("onselectstart" in root) {
+	    selection.on("selectstart.drag", null);
+	  } else {
+	    root.style.MozUserSelect = root.__noselect;
+	    delete root.__noselect;
+	  }
 	}
 
-	function styleConstant$1(name, interpolate, value1) {
-	  var string00,
-	      string1 = value1 + "",
-	      interpolate0;
-	  return function() {
-	    var string0 = styleValue(this, name);
-	    return string0 === string1 ? null
-	        : string0 === string00 ? interpolate0
-	        : interpolate0 = interpolate(string00 = string0, value1);
+	var constant$2 = (function (x) {
+	  return function () {
+	    return x;
 	  };
-	}
+	});
 
-	function styleFunction$1(name, interpolate, value) {
-	  var string00,
-	      string10,
-	      interpolate0;
-	  return function() {
-	    var string0 = styleValue(this, name),
-	        value1 = value(this),
-	        string1 = value1 + "";
-	    if (value1 == null) { string1 = value1 = (this.style.removeProperty(name), styleValue(this, name)); }
-	    return string0 === string1 ? null
-	        : string0 === string00 && string1 === string10 ? interpolate0
-	        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
-	  };
+	function DragEvent(type, _ref) {
+	  var sourceEvent = _ref.sourceEvent,
+	      subject = _ref.subject,
+	      target = _ref.target,
+	      identifier = _ref.identifier,
+	      active = _ref.active,
+	      x = _ref.x,
+	      y = _ref.y,
+	      dx = _ref.dx,
+	      dy = _ref.dy,
+	      dispatch = _ref.dispatch;
+	  Object.defineProperties(this, {
+	    type: {
+	      value: type,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    sourceEvent: {
+	      value: sourceEvent,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    subject: {
+	      value: subject,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    target: {
+	      value: target,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    identifier: {
+	      value: identifier,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    active: {
+	      value: active,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    x: {
+	      value: x,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    y: {
+	      value: y,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    dx: {
+	      value: dx,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    dy: {
+	      value: dy,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    _: {
+	      value: dispatch
+	    }
+	  });
 	}
 
-	function styleMaybeRemove(id, name) {
-	  var on0, on1, listener0, key = "style." + name, event = "end." + key, remove;
-	  return function() {
-	    var schedule = set$1(this, id),
-	        on = schedule.on,
-	        listener = schedule.value[key] == null ? remove || (remove = styleRemove$1(name)) : undefined;
+	DragEvent.prototype.on = function () {
+	  var value = this._.on.apply(this._, arguments);
 
-	    // If this node shared a dispatch with the previous node,
-	    // just assign the updated shared dispatch and we’re done!
-	    // Otherwise, copy-on-write.
-	    if (on !== on0 || listener0 !== listener) { (on1 = (on0 = on).copy()).on(event, listener0 = listener); }
+	  return value === this._ ? this : value;
+	};
 
-	    schedule.on = on1;
-	  };
+	function defaultFilter$2(event) {
+	  return !event.ctrlKey && !event.button;
 	}
 
-	function transition_style(name, value, priority) {
-	  var i = (name += "") === "transform" ? interpolateTransformCss : interpolate$1;
-	  return value == null ? this
-	      .styleTween(name, styleNull(name, i))
-	      .on("end.style." + name, styleRemove$1(name))
-	    : typeof value === "function" ? this
-	      .styleTween(name, styleFunction$1(name, i, tweenValue(this, "style." + name, value)))
-	      .each(styleMaybeRemove(this._id, name))
-	    : this
-	      .styleTween(name, styleConstant$1(name, i, value), priority)
-	      .on("end.style." + name, null);
+	function defaultContainer() {
+	  return this.parentNode;
 	}
 
-	function styleInterpolate(name, i, priority) {
-	  return function(t) {
-	    this.style.setProperty(name, i.call(this, t), priority);
-	  };
+	function defaultSubject(event, d) {
+	  return d == null ? {
+	    x: event.x,
+	    y: event.y
+	  } : d;
 	}
 
-	function styleTween(name, value, priority) {
-	  var t, i0;
-	  function tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) { t = (i0 = i) && styleInterpolate(name, i, priority); }
-	    return t;
-	  }
-	  tween._value = value;
-	  return tween;
+	function defaultTouchable$1() {
+	  return navigator.maxTouchPoints || "ontouchstart" in this;
 	}
 
-	function transition_styleTween(name, value, priority) {
-	  var key = "style." + (name += "");
-	  if (arguments.length < 2) { return (key = this.tween(key)) && key._value; }
-	  if (value == null) { return this.tween(key, null); }
-	  if (typeof value !== "function") { throw new Error; }
-	  return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
-	}
+	function d3_drag () {
+	  var filter = defaultFilter$2,
+	      container = defaultContainer,
+	      subject = defaultSubject,
+	      touchable = defaultTouchable$1,
+	      gestures = {},
+	      listeners = dispatch$8("start", "drag", "end"),
+	      active = 0,
+	      mousedownx,
+	      mousedowny,
+	      mousemoving,
+	      touchending,
+	      clickDistance2 = 0;
 
-	function textConstant$1(value) {
-	  return function() {
-	    this.textContent = value;
-	  };
-	}
+	  function drag(selection) {
+	    selection.on("mousedown.drag", mousedowned).filter(touchable).on("touchstart.drag", touchstarted).on("touchmove.drag", touchmoved).on("touchend.drag touchcancel.drag", touchended).style("touch-action", "none").style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+	  }
 
-	function textFunction$1(value) {
-	  return function() {
-	    var value1 = value(this);
-	    this.textContent = value1 == null ? "" : value1;
-	  };
-	}
+	  function mousedowned(event, d) {
+	    if (touchending || !filter.call(this, event, d)) return;
+	    var gesture = beforestart(this, container.call(this, event, d), event, d, "mouse");
+	    if (!gesture) return;
+	    select(event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
+	    dragDisable(event.view);
+	    nopropagation$1(event);
+	    mousemoving = false;
+	    mousedownx = event.clientX;
+	    mousedowny = event.clientY;
+	    gesture("start", event);
+	  }
 
-	function transition_text(value) {
-	  return this.tween("text", typeof value === "function"
-	      ? textFunction$1(tweenValue(this, "text", value))
-	      : textConstant$1(value == null ? "" : value + ""));
-	}
+	  function mousemoved(event) {
+	    noevent$1(event);
 
-	function textInterpolate(i) {
-	  return function(t) {
-	    this.textContent = i.call(this, t);
-	  };
-	}
+	    if (!mousemoving) {
+	      var dx = event.clientX - mousedownx,
+	          dy = event.clientY - mousedowny;
+	      mousemoving = dx * dx + dy * dy > clickDistance2;
+	    }
 
-	function textTween(value) {
-	  var t0, i0;
-	  function tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) { t0 = (i0 = i) && textInterpolate(i); }
-	    return t0;
+	    gestures.mouse("drag", event);
 	  }
-	  tween._value = value;
-	  return tween;
-	}
 
-	function transition_textTween(value) {
-	  var key = "text";
-	  if (arguments.length < 1) { return (key = this.tween(key)) && key._value; }
-	  if (value == null) { return this.tween(key, null); }
-	  if (typeof value !== "function") { throw new Error; }
-	  return this.tween(key, textTween(value));
-	}
+	  function mouseupped(event) {
+	    select(event.view).on("mousemove.drag mouseup.drag", null);
+	    yesdrag(event.view, mousemoving);
+	    noevent$1(event);
+	    gestures.mouse("end", event);
+	  }
 
-	function transition_transition() {
-	  var name = this._name,
-	      id0 = this._id,
-	      id1 = newId();
+	  function touchstarted(event, d) {
+	    if (!filter.call(this, event, d)) return;
+	    var touches = event.changedTouches,
+	        c = container.call(this, event, d),
+	        n = touches.length,
+	        i,
+	        gesture;
 
-	  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-	      if (node = group[i]) {
-	        var inherit = get$2(node, id0);
-	        schedule(node, name, id1, i, group, {
-	          time: inherit.time + inherit.delay + inherit.duration,
-	          delay: 0,
-	          duration: inherit.duration,
-	          ease: inherit.ease
-	        });
+	    for (i = 0; i < n; ++i) {
+	      if (gesture = beforestart(this, c, event, d, touches[i].identifier, touches[i])) {
+	        nopropagation$1(event);
+	        gesture("start", event, touches[i]);
 	      }
 	    }
 	  }
 
-	  return new Transition(groups, this._parents, name, id1);
-	}
-
-	function transition_end() {
-	  var on0, on1, that = this, id = that._id, size = that.size();
-	  return new Promise(function(resolve, reject) {
-	    var cancel = {value: reject},
-	        end = {value: function() { if (--size === 0) { resolve(); } }};
-
-	    that.each(function() {
-	      var schedule = set$1(this, id),
-	          on = schedule.on;
+	  function touchmoved(event) {
+	    var touches = event.changedTouches,
+	        n = touches.length,
+	        i,
+	        gesture;
 
-	      // If this node shared a dispatch with the previous node,
-	      // just assign the updated shared dispatch and we’re done!
-	      // Otherwise, copy-on-write.
-	      if (on !== on0) {
-	        on1 = (on0 = on).copy();
-	        on1._.cancel.push(cancel);
-	        on1._.interrupt.push(cancel);
-	        on1._.end.push(end);
+	    for (i = 0; i < n; ++i) {
+	      if (gesture = gestures[touches[i].identifier]) {
+	        noevent$1(event);
+	        gesture("drag", event, touches[i]);
 	      }
+	    }
+	  }
 
-	      schedule.on = on1;
-	    });
-	  });
-	}
-
-	var id$3 = 0;
-
-	function Transition(groups, parents, name, id) {
-	  this._groups = groups;
-	  this._parents = parents;
-	  this._name = name;
-	  this._id = id;
-	}
-
-	function transition(name) {
-	  return selection().transition(name);
-	}
-
-	function newId() {
-	  return ++id$3;
-	}
+	  function touchended(event) {
+	    var touches = event.changedTouches,
+	        n = touches.length,
+	        i,
+	        gesture;
+	    if (touchending) clearTimeout(touchending);
+	    touchending = setTimeout(function () {
+	      touchending = null;
+	    }, 500); // Ghost clicks are delayed!
 
-	var selection_prototype = selection.prototype;
+	    for (i = 0; i < n; ++i) {
+	      if (gesture = gestures[touches[i].identifier]) {
+	        nopropagation$1(event);
+	        gesture("end", event, touches[i]);
+	      }
+	    }
+	  }
 
-	Transition.prototype = transition.prototype = {
-	  constructor: Transition,
-	  select: transition_select,
-	  selectAll: transition_selectAll,
-	  filter: transition_filter,
-	  merge: transition_merge,
-	  selection: transition_selection,
-	  transition: transition_transition,
-	  call: selection_prototype.call,
-	  nodes: selection_prototype.nodes,
-	  node: selection_prototype.node,
-	  size: selection_prototype.size,
-	  empty: selection_prototype.empty,
-	  each: selection_prototype.each,
-	  on: transition_on,
-	  attr: transition_attr,
-	  attrTween: transition_attrTween,
-	  style: transition_style,
-	  styleTween: transition_styleTween,
-	  text: transition_text,
-	  textTween: transition_textTween,
-	  remove: transition_remove,
-	  tween: transition_tween,
-	  delay: transition_delay,
-	  duration: transition_duration,
-	  ease: transition_ease,
-	  end: transition_end
-	};
+	  function beforestart(that, container, event, d, identifier, touch) {
+	    var dispatch = listeners.copy(),
+	        p = pointer(touch || event, container),
+	        dx,
+	        dy,
+	        s;
+	    if ((s = subject.call(that, new DragEvent("beforestart", {
+	      sourceEvent: event,
+	      target: drag,
+	      identifier: identifier,
+	      active: active,
+	      x: p[0],
+	      y: p[1],
+	      dx: 0,
+	      dy: 0,
+	      dispatch: dispatch
+	    }), d)) == null) return;
+	    dx = s.x - p[0] || 0;
+	    dy = s.y - p[1] || 0;
+	    return function gesture(type, event, touch) {
+	      var p0 = p,
+	          n;
 
-	function linear$1(t) {
-	  return +t;
-	}
+	      switch (type) {
+	        case "start":
+	          gestures[identifier] = gesture, n = active++;
+	          break;
 
-	function cubicInOut(t) {
-	  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
-	}
+	        case "end":
+	          delete gestures[identifier], --active;
+	        // nobreak
 
-	var defaultTiming = {
-	  time: null, // Set on use.
-	  delay: 0,
-	  duration: 250,
-	  ease: cubicInOut
-	};
+	        case "drag":
+	          p = pointer(touch || event, container), n = active;
+	          break;
+	      }
 
-	function inherit(node, id) {
-	  var timing;
-	  while (!(timing = node.__transition) || !(timing = timing[id])) {
-	    if (!(node = node.parentNode)) {
-	      return defaultTiming.time = now(), defaultTiming;
-	    }
+	      dispatch.call(type, that, new DragEvent(type, {
+	        sourceEvent: event,
+	        subject: s,
+	        target: drag,
+	        identifier: identifier,
+	        active: n,
+	        x: p[0] + dx,
+	        y: p[1] + dy,
+	        dx: p[0] - p0[0],
+	        dy: p[1] - p0[1],
+	        dispatch: dispatch
+	      }), d);
+	    };
 	  }
-	  return timing;
-	}
 
-	function selection_transition(name) {
-	  var id,
-	      timing;
+	  drag.filter = function (_) {
+	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$2(!!_), drag) : filter;
+	  };
 
-	  if (name instanceof Transition) {
-	    id = name._id, name = name._name;
-	  } else {
-	    id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
-	  }
+	  drag.container = function (_) {
+	    return arguments.length ? (container = typeof _ === "function" ? _ : constant$2(_), drag) : container;
+	  };
 
-	  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-	      if (node = group[i]) {
-	        schedule(node, name, id, i, group, timing || inherit(node, id));
-	      }
-	    }
-	  }
+	  drag.subject = function (_) {
+	    return arguments.length ? (subject = typeof _ === "function" ? _ : constant$2(_), drag) : subject;
+	  };
 
-	  return new Transition(groups, this._parents, name, id);
-	}
+	  drag.touchable = function (_) {
+	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$2(!!_), drag) : touchable;
+	  };
 
-	selection.prototype.interrupt = selection_interrupt;
-	selection.prototype.transition = selection_transition;
+	  drag.on = function () {
+	    var value = listeners.on.apply(listeners, arguments);
+	    return value === listeners ? drag : value;
+	  };
 
-	function constant$3(x) {
-	  return function() {
-	    return x;
+	  drag.clickDistance = function (_) {
+	    return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
 	  };
-	}
 
-	function ZoomEvent(target, type, transform) {
-	  this.target = target;
-	  this.type = type;
-	  this.transform = transform;
+	  return drag;
 	}
 
-	function Transform(k, x, y) {
-	  this.k = k;
-	  this.x = x;
-	  this.y = y;
-	}
+	var DESCRIPTORS$4 = descriptors;
+	var global$b = global$1o;
+	var uncurryThis$e = functionUncurryThis;
+	var isForced$1 = isForced_1;
+	var inheritIfRequired$1 = inheritIfRequired$4;
+	var createNonEnumerableProperty = createNonEnumerableProperty$b;
+	var defineProperty$1 = objectDefineProperty.f;
+	var getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;
+	var isPrototypeOf$1 = objectIsPrototypeOf;
+	var isRegExp$1 = isRegexp;
+	var toString$9 = toString$k;
+	var regExpFlags$1 = regexpFlags$1;
+	var stickyHelpers = regexpStickyHelpers;
+	var redefine$3 = redefine$h.exports;
+	var fails$a = fails$V;
+	var hasOwn$2 = hasOwnProperty_1;
+	var enforceInternalState = internalState.enforce;
+	var setSpecies = setSpecies$5;
+	var wellKnownSymbol$1 = wellKnownSymbol$t;
+	var UNSUPPORTED_DOT_ALL = regexpUnsupportedDotAll;
+	var UNSUPPORTED_NCG = regexpUnsupportedNcg;
+
+	var MATCH$1 = wellKnownSymbol$1('match');
+	var NativeRegExp = global$b.RegExp;
+	var RegExpPrototype$1 = NativeRegExp.prototype;
+	var SyntaxError$1 = global$b.SyntaxError;
+	var getFlags = uncurryThis$e(regExpFlags$1);
+	var exec$2 = uncurryThis$e(RegExpPrototype$1.exec);
+	var charAt$1 = uncurryThis$e(''.charAt);
+	var replace$3 = uncurryThis$e(''.replace);
+	var stringIndexOf$1 = uncurryThis$e(''.indexOf);
+	var stringSlice$4 = uncurryThis$e(''.slice);
+	// TODO: Use only propper RegExpIdentifierName
+	var IS_NCG = /^\?<[^\s\d!#%&*+<=>@^][^\s!#%&*+<=>@^]*>/;
+	var re1 = /a/g;
+	var re2 = /a/g;
+
+	// "new" should create a new object, old webkit bug
+	var CORRECT_NEW = new NativeRegExp(re1) !== re1;
+
+	var MISSED_STICKY = stickyHelpers.MISSED_STICKY;
+	var UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y;
+
+	var BASE_FORCED = DESCRIPTORS$4 &&
+	  (!CORRECT_NEW || MISSED_STICKY || UNSUPPORTED_DOT_ALL || UNSUPPORTED_NCG || fails$a(function () {
+	    re2[MATCH$1] = false;
+	    // RegExp constructor can alter flags and IsRegExp works correct with @@match
+	    return NativeRegExp(re1) != re1 || NativeRegExp(re2) == re2 || NativeRegExp(re1, 'i') != '/a/i';
+	  }));
+
+	var handleDotAll = function (string) {
+	  var length = string.length;
+	  var index = 0;
+	  var result = '';
+	  var brackets = false;
+	  var chr;
+	  for (; index <= length; index++) {
+	    chr = charAt$1(string, index);
+	    if (chr === '\\') {
+	      result += chr + charAt$1(string, ++index);
+	      continue;
+	    }
+	    if (!brackets && chr === '.') {
+	      result += '[\\s\\S]';
+	    } else {
+	      if (chr === '[') {
+	        brackets = true;
+	      } else if (chr === ']') {
+	        brackets = false;
+	      } result += chr;
+	    }
+	  } return result;
+	};
 
-	Transform.prototype = {
-	  constructor: Transform,
-	  scale: function(k) {
-	    return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
-	  },
-	  translate: function(x, y) {
-	    return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
-	  },
-	  apply: function(point) {
-	    return [point[0] * this.k + this.x, point[1] * this.k + this.y];
-	  },
-	  applyX: function(x) {
-	    return x * this.k + this.x;
-	  },
-	  applyY: function(y) {
-	    return y * this.k + this.y;
-	  },
-	  invert: function(location) {
-	    return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
-	  },
-	  invertX: function(x) {
-	    return (x - this.x) / this.k;
-	  },
-	  invertY: function(y) {
-	    return (y - this.y) / this.k;
-	  },
-	  rescaleX: function(x) {
-	    return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
-	  },
-	  rescaleY: function(y) {
-	    return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
-	  },
-	  toString: function() {
-	    return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
-	  }
+	var handleNCG = function (string) {
+	  var length = string.length;
+	  var index = 0;
+	  var result = '';
+	  var named = [];
+	  var names = {};
+	  var brackets = false;
+	  var ncg = false;
+	  var groupid = 0;
+	  var groupname = '';
+	  var chr;
+	  for (; index <= length; index++) {
+	    chr = charAt$1(string, index);
+	    if (chr === '\\') {
+	      chr = chr + charAt$1(string, ++index);
+	    } else if (chr === ']') {
+	      brackets = false;
+	    } else if (!brackets) switch (true) {
+	      case chr === '[':
+	        brackets = true;
+	        break;
+	      case chr === '(':
+	        if (exec$2(IS_NCG, stringSlice$4(string, index + 1))) {
+	          index += 2;
+	          ncg = true;
+	        }
+	        result += chr;
+	        groupid++;
+	        continue;
+	      case chr === '>' && ncg:
+	        if (groupname === '' || hasOwn$2(names, groupname)) {
+	          throw new SyntaxError$1('Invalid capture group name');
+	        }
+	        names[groupname] = true;
+	        named[named.length] = [groupname, groupid];
+	        ncg = false;
+	        groupname = '';
+	        continue;
+	    }
+	    if (ncg) groupname += chr;
+	    else result += chr;
+	  } return [result, named];
 	};
 
-	var identity$2 = new Transform(1, 0, 0);
+	// `RegExp` constructor
+	// https://tc39.es/ecma262/#sec-regexp-constructor
+	if (isForced$1('RegExp', BASE_FORCED)) {
+	  var RegExpWrapper = function RegExp(pattern, flags) {
+	    var thisIsRegExp = isPrototypeOf$1(RegExpPrototype$1, this);
+	    var patternIsRegExp = isRegExp$1(pattern);
+	    var flagsAreUndefined = flags === undefined;
+	    var groups = [];
+	    var rawPattern = pattern;
+	    var rawFlags, dotAll, sticky, handled, result, state;
 
-	function nopropagation$1() {
-	  event.stopImmediatePropagation();
-	}
+	    if (!thisIsRegExp && patternIsRegExp && flagsAreUndefined && pattern.constructor === RegExpWrapper) {
+	      return pattern;
+	    }
 
-	function noevent$1() {
-	  event.preventDefault();
-	  event.stopImmediatePropagation();
-	}
+	    if (patternIsRegExp || isPrototypeOf$1(RegExpPrototype$1, pattern)) {
+	      pattern = pattern.source;
+	      if (flagsAreUndefined) flags = 'flags' in rawPattern ? rawPattern.flags : getFlags(rawPattern);
+	    }
 
-	// Ignore right-click, since that should open the context menu.
-	function defaultFilter$1() {
-	  return !event.ctrlKey && !event.button;
-	}
+	    pattern = pattern === undefined ? '' : toString$9(pattern);
+	    flags = flags === undefined ? '' : toString$9(flags);
+	    rawPattern = pattern;
 
-	function defaultExtent() {
-	  var e = this;
-	  if (e instanceof SVGElement) {
-	    e = e.ownerSVGElement || e;
-	    if (e.hasAttribute("viewBox")) {
-	      e = e.viewBox.baseVal;
-	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+	    if (UNSUPPORTED_DOT_ALL && 'dotAll' in re1) {
+	      dotAll = !!flags && stringIndexOf$1(flags, 's') > -1;
+	      if (dotAll) flags = replace$3(flags, /s/g, '');
 	    }
-	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
-	  }
-	  return [[0, 0], [e.clientWidth, e.clientHeight]];
-	}
-
-	function defaultTransform() {
-	  return this.__zoom || identity$2;
-	}
 
-	function defaultWheelDelta() {
-	  return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002);
-	}
+	    rawFlags = flags;
 
-	function defaultTouchable$1() {
-	  return navigator.maxTouchPoints || ("ontouchstart" in this);
-	}
+	    if (MISSED_STICKY && 'sticky' in re1) {
+	      sticky = !!flags && stringIndexOf$1(flags, 'y') > -1;
+	      if (sticky && UNSUPPORTED_Y) flags = replace$3(flags, /y/g, '');
+	    }
 
-	function defaultConstrain(transform, extent, translateExtent) {
-	  var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
-	      dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
-	      dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
-	      dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
-	  return transform.translate(
-	    dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
-	    dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
-	  );
-	}
+	    if (UNSUPPORTED_NCG) {
+	      handled = handleNCG(pattern);
+	      pattern = handled[0];
+	      groups = handled[1];
+	    }
 
-	function d3_zoom() {
-	  var filter = defaultFilter$1,
-	      extent = defaultExtent,
-	      constrain = defaultConstrain,
-	      wheelDelta = defaultWheelDelta,
-	      touchable = defaultTouchable$1,
-	      scaleExtent = [0, Infinity],
-	      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
-	      duration = 250,
-	      interpolate = interpolateZoom,
-	      listeners = dispatch("start", "zoom", "end"),
-	      touchstarting,
-	      touchending,
-	      touchDelay = 500,
-	      wheelDelay = 150,
-	      clickDistance2 = 0;
+	    result = inheritIfRequired$1(NativeRegExp(pattern, flags), thisIsRegExp ? this : RegExpPrototype$1, RegExpWrapper);
 
-	  function zoom(selection) {
-	    selection
-	        .property("__zoom", defaultTransform)
-	        .on("wheel.zoom", wheeled)
-	        .on("mousedown.zoom", mousedowned)
-	        .on("dblclick.zoom", dblclicked)
-	      .filter(touchable)
-	        .on("touchstart.zoom", touchstarted)
-	        .on("touchmove.zoom", touchmoved)
-	        .on("touchend.zoom touchcancel.zoom", touchended)
-	        .style("touch-action", "none")
-	        .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
-	  }
-
-	  zoom.transform = function(collection, transform, point) {
-	    var selection = collection.selection ? collection.selection() : collection;
-	    selection.property("__zoom", defaultTransform);
-	    if (collection !== selection) {
-	      schedule(collection, transform, point);
-	    } else {
-	      selection.interrupt().each(function() {
-	        gesture(this, arguments)
-	            .start()
-	            .zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform)
-	            .end();
-	      });
+	    if (dotAll || sticky || groups.length) {
+	      state = enforceInternalState(result);
+	      if (dotAll) {
+	        state.dotAll = true;
+	        state.raw = RegExpWrapper(handleDotAll(pattern), rawFlags);
+	      }
+	      if (sticky) state.sticky = true;
+	      if (groups.length) state.groups = groups;
 	    }
-	  };
 
-	  zoom.scaleBy = function(selection, k, p) {
-	    zoom.scaleTo(selection, function() {
-	      var k0 = this.__zoom.k,
-	          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
-	      return k0 * k1;
-	    }, p);
-	  };
+	    if (pattern !== rawPattern) try {
+	      // fails in old engines, but we have no alternatives for unsupported regex syntax
+	      createNonEnumerableProperty(result, 'source', rawPattern === '' ? '(?:)' : rawPattern);
+	    } catch (error) { /* empty */ }
 
-	  zoom.scaleTo = function(selection, k, p) {
-	    zoom.transform(selection, function() {
-	      var e = extent.apply(this, arguments),
-	          t0 = this.__zoom,
-	          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p,
-	          p1 = t0.invert(p0),
-	          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
-	      return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
-	    }, p);
+	    return result;
 	  };
 
-	  zoom.translateBy = function(selection, x, y) {
-	    zoom.transform(selection, function() {
-	      return constrain(this.__zoom.translate(
-	        typeof x === "function" ? x.apply(this, arguments) : x,
-	        typeof y === "function" ? y.apply(this, arguments) : y
-	      ), extent.apply(this, arguments), translateExtent);
+	  var proxy = function (key) {
+	    key in RegExpWrapper || defineProperty$1(RegExpWrapper, key, {
+	      configurable: true,
+	      get: function () { return NativeRegExp[key]; },
+	      set: function (it) { NativeRegExp[key] = it; }
 	    });
 	  };
 
-	  zoom.translateTo = function(selection, x, y, p) {
-	    zoom.transform(selection, function() {
-	      var e = extent.apply(this, arguments),
-	          t = this.__zoom,
-	          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p;
-	      return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(
-	        typeof x === "function" ? -x.apply(this, arguments) : -x,
-	        typeof y === "function" ? -y.apply(this, arguments) : -y
-	      ), e, translateExtent);
-	    }, p);
-	  };
-
-	  function scale(transform, k) {
-	    k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
-	    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
+	  for (var keys$1 = getOwnPropertyNames$1(NativeRegExp), index$1 = 0; keys$1.length > index$1;) {
+	    proxy(keys$1[index$1++]);
 	  }
 
-	  function translate(transform, p0, p1) {
-	    var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;
-	    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
-	  }
+	  RegExpPrototype$1.constructor = RegExpWrapper;
+	  RegExpWrapper.prototype = RegExpPrototype$1;
+	  redefine$3(global$b, 'RegExp', RegExpWrapper);
+	}
 
-	  function centroid(extent) {
-	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
-	  }
+	// https://tc39.es/ecma262/#sec-get-regexp-@@species
+	setSpecies('RegExp');
 
-	  function schedule(transition, transform, point) {
-	    transition
-	        .on("start.zoom", function() { gesture(this, arguments).start(); })
-	        .on("interrupt.zoom end.zoom", function() { gesture(this, arguments).end(); })
-	        .tween("zoom", function() {
-	          var that = this,
-	              args = arguments,
-	              g = gesture(that, args),
-	              e = extent.apply(that, args),
-	              p = point == null ? centroid(e) : typeof point === "function" ? point.apply(that, args) : point,
-	              w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
-	              a = that.__zoom,
-	              b = typeof transform === "function" ? transform.apply(that, args) : transform,
-	              i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
-	          return function(t) {
-	            if (t === 1) { t = b; } // Avoid rounding error on end.
-	            else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }
-	            g.zoom(null, t);
-	          };
-	        });
-	  }
+	function define (constructor, factory, prototype) {
+	  constructor.prototype = factory.prototype = prototype;
+	  prototype.constructor = constructor;
+	}
+	function extend$3(parent, definition) {
+	  var prototype = Object.create(parent.prototype);
 
-	  function gesture(that, args, clean) {
-	    return (!clean && that.__zooming) || new Gesture(that, args);
+	  for (var key in definition) {
+	    prototype[key] = definition[key];
 	  }
 
-	  function Gesture(that, args) {
-	    this.that = that;
-	    this.args = args;
-	    this.active = 0;
-	    this.extent = extent.apply(that, args);
-	    this.taps = 0;
-	  }
-
-	  Gesture.prototype = {
-	    start: function() {
-	      if (++this.active === 1) {
-	        this.that.__zooming = this;
-	        this.emit("start");
-	      }
-	      return this;
-	    },
-	    zoom: function(key, transform) {
-	      if (this.mouse && key !== "mouse") { this.mouse[1] = transform.invert(this.mouse[0]); }
-	      if (this.touch0 && key !== "touch") { this.touch0[1] = transform.invert(this.touch0[0]); }
-	      if (this.touch1 && key !== "touch") { this.touch1[1] = transform.invert(this.touch1[0]); }
-	      this.that.__zoom = transform;
-	      this.emit("zoom");
-	      return this;
-	    },
-	    end: function() {
-	      if (--this.active === 0) {
-	        delete this.that.__zooming;
-	        this.emit("end");
-	      }
-	      return this;
-	    },
-	    emit: function(type) {
-	      customEvent(new ZoomEvent(zoom, type, this.that.__zoom), listeners.apply, listeners, [type, this.that, this.args]);
-	    }
-	  };
-
-	  function wheeled() {
-	    if (!filter.apply(this, arguments)) { return; }
-	    var g = gesture(this, arguments),
-	        t = this.__zoom,
-	        k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
-	        p = mouse(this);
+	  return prototype;
+	}
 
-	    // If the mouse is in the same location as before, reuse it.
-	    // If there were recent wheel events, reset the wheel idle timeout.
-	    if (g.wheel) {
-	      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
-	        g.mouse[1] = t.invert(g.mouse[0] = p);
-	      }
-	      clearTimeout(g.wheel);
-	    }
+	function Color() {}
+	var _darker = 0.7;
 
-	    // If this wheel event won’t trigger a transform change, ignore it.
-	    else if (t.k === k) { return; }
+	var _brighter = 1 / _darker;
+	var reI = "\\s*([+-]?\\d+)\\s*",
+	    reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*",
+	    reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
+	    reHex = /^#([0-9a-f]{3,8})$/,
+	    reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"),
+	    reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"),
+	    reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"),
+	    reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$"),
+	    reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$"),
+	    reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
+	var named = {
+	  aliceblue: 0xf0f8ff,
+	  antiquewhite: 0xfaebd7,
+	  aqua: 0x00ffff,
+	  aquamarine: 0x7fffd4,
+	  azure: 0xf0ffff,
+	  beige: 0xf5f5dc,
+	  bisque: 0xffe4c4,
+	  black: 0x000000,
+	  blanchedalmond: 0xffebcd,
+	  blue: 0x0000ff,
+	  blueviolet: 0x8a2be2,
+	  brown: 0xa52a2a,
+	  burlywood: 0xdeb887,
+	  cadetblue: 0x5f9ea0,
+	  chartreuse: 0x7fff00,
+	  chocolate: 0xd2691e,
+	  coral: 0xff7f50,
+	  cornflowerblue: 0x6495ed,
+	  cornsilk: 0xfff8dc,
+	  crimson: 0xdc143c,
+	  cyan: 0x00ffff,
+	  darkblue: 0x00008b,
+	  darkcyan: 0x008b8b,
+	  darkgoldenrod: 0xb8860b,
+	  darkgray: 0xa9a9a9,
+	  darkgreen: 0x006400,
+	  darkgrey: 0xa9a9a9,
+	  darkkhaki: 0xbdb76b,
+	  darkmagenta: 0x8b008b,
+	  darkolivegreen: 0x556b2f,
+	  darkorange: 0xff8c00,
+	  darkorchid: 0x9932cc,
+	  darkred: 0x8b0000,
+	  darksalmon: 0xe9967a,
+	  darkseagreen: 0x8fbc8f,
+	  darkslateblue: 0x483d8b,
+	  darkslategray: 0x2f4f4f,
+	  darkslategrey: 0x2f4f4f,
+	  darkturquoise: 0x00ced1,
+	  darkviolet: 0x9400d3,
+	  deeppink: 0xff1493,
+	  deepskyblue: 0x00bfff,
+	  dimgray: 0x696969,
+	  dimgrey: 0x696969,
+	  dodgerblue: 0x1e90ff,
+	  firebrick: 0xb22222,
+	  floralwhite: 0xfffaf0,
+	  forestgreen: 0x228b22,
+	  fuchsia: 0xff00ff,
+	  gainsboro: 0xdcdcdc,
+	  ghostwhite: 0xf8f8ff,
+	  gold: 0xffd700,
+	  goldenrod: 0xdaa520,
+	  gray: 0x808080,
+	  green: 0x008000,
+	  greenyellow: 0xadff2f,
+	  grey: 0x808080,
+	  honeydew: 0xf0fff0,
+	  hotpink: 0xff69b4,
+	  indianred: 0xcd5c5c,
+	  indigo: 0x4b0082,
+	  ivory: 0xfffff0,
+	  khaki: 0xf0e68c,
+	  lavender: 0xe6e6fa,
+	  lavenderblush: 0xfff0f5,
+	  lawngreen: 0x7cfc00,
+	  lemonchiffon: 0xfffacd,
+	  lightblue: 0xadd8e6,
+	  lightcoral: 0xf08080,
+	  lightcyan: 0xe0ffff,
+	  lightgoldenrodyellow: 0xfafad2,
+	  lightgray: 0xd3d3d3,
+	  lightgreen: 0x90ee90,
+	  lightgrey: 0xd3d3d3,
+	  lightpink: 0xffb6c1,
+	  lightsalmon: 0xffa07a,
+	  lightseagreen: 0x20b2aa,
+	  lightskyblue: 0x87cefa,
+	  lightslategray: 0x778899,
+	  lightslategrey: 0x778899,
+	  lightsteelblue: 0xb0c4de,
+	  lightyellow: 0xffffe0,
+	  lime: 0x00ff00,
+	  limegreen: 0x32cd32,
+	  linen: 0xfaf0e6,
+	  magenta: 0xff00ff,
+	  maroon: 0x800000,
+	  mediumaquamarine: 0x66cdaa,
+	  mediumblue: 0x0000cd,
+	  mediumorchid: 0xba55d3,
+	  mediumpurple: 0x9370db,
+	  mediumseagreen: 0x3cb371,
+	  mediumslateblue: 0x7b68ee,
+	  mediumspringgreen: 0x00fa9a,
+	  mediumturquoise: 0x48d1cc,
+	  mediumvioletred: 0xc71585,
+	  midnightblue: 0x191970,
+	  mintcream: 0xf5fffa,
+	  mistyrose: 0xffe4e1,
+	  moccasin: 0xffe4b5,
+	  navajowhite: 0xffdead,
+	  navy: 0x000080,
+	  oldlace: 0xfdf5e6,
+	  olive: 0x808000,
+	  olivedrab: 0x6b8e23,
+	  orange: 0xffa500,
+	  orangered: 0xff4500,
+	  orchid: 0xda70d6,
+	  palegoldenrod: 0xeee8aa,
+	  palegreen: 0x98fb98,
+	  paleturquoise: 0xafeeee,
+	  palevioletred: 0xdb7093,
+	  papayawhip: 0xffefd5,
+	  peachpuff: 0xffdab9,
+	  peru: 0xcd853f,
+	  pink: 0xffc0cb,
+	  plum: 0xdda0dd,
+	  powderblue: 0xb0e0e6,
+	  purple: 0x800080,
+	  rebeccapurple: 0x663399,
+	  red: 0xff0000,
+	  rosybrown: 0xbc8f8f,
+	  royalblue: 0x4169e1,
+	  saddlebrown: 0x8b4513,
+	  salmon: 0xfa8072,
+	  sandybrown: 0xf4a460,
+	  seagreen: 0x2e8b57,
+	  seashell: 0xfff5ee,
+	  sienna: 0xa0522d,
+	  silver: 0xc0c0c0,
+	  skyblue: 0x87ceeb,
+	  slateblue: 0x6a5acd,
+	  slategray: 0x708090,
+	  slategrey: 0x708090,
+	  snow: 0xfffafa,
+	  springgreen: 0x00ff7f,
+	  steelblue: 0x4682b4,
+	  tan: 0xd2b48c,
+	  teal: 0x008080,
+	  thistle: 0xd8bfd8,
+	  tomato: 0xff6347,
+	  turquoise: 0x40e0d0,
+	  violet: 0xee82ee,
+	  wheat: 0xf5deb3,
+	  white: 0xffffff,
+	  whitesmoke: 0xf5f5f5,
+	  yellow: 0xffff00,
+	  yellowgreen: 0x9acd32
+	};
+	define(Color, color, {
+	  copy: function copy(channels) {
+	    return Object.assign(new this.constructor(), this, channels);
+	  },
+	  displayable: function displayable() {
+	    return this.rgb().displayable();
+	  },
+	  hex: color_formatHex,
+	  // Deprecated! Use color.formatHex.
+	  formatHex: color_formatHex,
+	  formatHsl: color_formatHsl,
+	  formatRgb: color_formatRgb,
+	  toString: color_formatRgb
+	});
 
-	    // Otherwise, capture the mouse point and location at the start.
-	    else {
-	      g.mouse = [p, t.invert(p)];
-	      interrupt(this);
-	      g.start();
-	    }
+	function color_formatHex() {
+	  return this.rgb().formatHex();
+	}
 
-	    noevent$1();
-	    g.wheel = setTimeout(wheelidled, wheelDelay);
-	    g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
+	function color_formatHsl() {
+	  return hslConvert(this).formatHsl();
+	}
 
-	    function wheelidled() {
-	      g.wheel = null;
-	      g.end();
-	    }
-	  }
+	function color_formatRgb() {
+	  return this.rgb().formatRgb();
+	}
 
-	  function mousedowned() {
-	    if (touchending || !filter.apply(this, arguments)) { return; }
-	    var g = gesture(this, arguments, true),
-	        v = select(event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
-	        p = mouse(this),
-	        x0 = event.clientX,
-	        y0 = event.clientY;
+	function color(format) {
+	  var m, l;
+	  format = (format + "").trim().toLowerCase();
+	  return (m = reHex.exec(format)) ? (l = m[1].length, m = parseInt(m[1], 16), l === 6 ? rgbn(m) // #ff0000
+	  : l === 3 ? new Rgb(m >> 8 & 0xf | m >> 4 & 0xf0, m >> 4 & 0xf | m & 0xf0, (m & 0xf) << 4 | m & 0xf, 1) // #f00
+	  : l === 8 ? rgba(m >> 24 & 0xff, m >> 16 & 0xff, m >> 8 & 0xff, (m & 0xff) / 0xff) // #ff000000
+	  : l === 4 ? rgba(m >> 12 & 0xf | m >> 8 & 0xf0, m >> 8 & 0xf | m >> 4 & 0xf0, m >> 4 & 0xf | m & 0xf0, ((m & 0xf) << 4 | m & 0xf) / 0xff) // #f000
+	  : null // invalid hex
+	  ) : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
+	  : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
+	  : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
+	  : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
+	  : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
+	  : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
+	  : named.hasOwnProperty(format) ? rgbn(named[format]) // eslint-disable-line no-prototype-builtins
+	  : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0) : null;
+	}
 
-	    dragDisable(event.view);
-	    nopropagation$1();
-	    g.mouse = [p, this.__zoom.invert(p)];
-	    interrupt(this);
-	    g.start();
+	function rgbn(n) {
+	  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
+	}
 
-	    function mousemoved() {
-	      noevent$1();
-	      if (!g.moved) {
-	        var dx = event.clientX - x0, dy = event.clientY - y0;
-	        g.moved = dx * dx + dy * dy > clickDistance2;
-	      }
-	      g.zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = mouse(g.that), g.mouse[1]), g.extent, translateExtent));
-	    }
+	function rgba(r, g, b, a) {
+	  if (a <= 0) r = g = b = NaN;
+	  return new Rgb(r, g, b, a);
+	}
 
-	    function mouseupped() {
-	      v.on("mousemove.zoom mouseup.zoom", null);
-	      yesdrag(event.view, g.moved);
-	      noevent$1();
-	      g.end();
-	    }
-	  }
+	function rgbConvert(o) {
+	  if (!(o instanceof Color)) o = color(o);
+	  if (!o) return new Rgb();
+	  o = o.rgb();
+	  return new Rgb(o.r, o.g, o.b, o.opacity);
+	}
+	function rgb(r, g, b, opacity) {
+	  return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
+	}
+	function Rgb(r, g, b, opacity) {
+	  this.r = +r;
+	  this.g = +g;
+	  this.b = +b;
+	  this.opacity = +opacity;
+	}
+	define(Rgb, rgb, extend$3(Color, {
+	  brighter: function brighter(k) {
+	    k = k == null ? _brighter : Math.pow(_brighter, k);
+	    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
+	  },
+	  darker: function darker(k) {
+	    k = k == null ? _darker : Math.pow(_darker, k);
+	    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
+	  },
+	  rgb: function rgb() {
+	    return this;
+	  },
+	  displayable: function displayable() {
+	    return -0.5 <= this.r && this.r < 255.5 && -0.5 <= this.g && this.g < 255.5 && -0.5 <= this.b && this.b < 255.5 && 0 <= this.opacity && this.opacity <= 1;
+	  },
+	  hex: rgb_formatHex,
+	  // Deprecated! Use color.formatHex.
+	  formatHex: rgb_formatHex,
+	  formatRgb: rgb_formatRgb,
+	  toString: rgb_formatRgb
+	}));
 
-	  function dblclicked() {
-	    if (!filter.apply(this, arguments)) { return; }
-	    var t0 = this.__zoom,
-	        p0 = mouse(this),
-	        p1 = t0.invert(p0),
-	        k1 = t0.k * (event.shiftKey ? 0.5 : 2),
-	        t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, arguments), translateExtent);
+	function rgb_formatHex() {
+	  return "#" + hex$1(this.r) + hex$1(this.g) + hex$1(this.b);
+	}
 
-	    noevent$1();
-	    if (duration > 0) { select(this).transition().duration(duration).call(schedule, t1, p0); }
-	    else { select(this).call(zoom.transform, t1); }
-	  }
+	function rgb_formatRgb() {
+	  var a = this.opacity;
+	  a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
+	  return (a === 1 ? "rgb(" : "rgba(") + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", " + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", " + Math.max(0, Math.min(255, Math.round(this.b) || 0)) + (a === 1 ? ")" : ", " + a + ")");
+	}
 
-	  function touchstarted() {
-	    if (!filter.apply(this, arguments)) { return; }
-	    var touches = event.touches,
-	        n = touches.length,
-	        g = gesture(this, arguments, event.changedTouches.length === n),
-	        started, i, t, p;
+	function hex$1(value) {
+	  value = Math.max(0, Math.min(255, Math.round(value) || 0));
+	  return (value < 16 ? "0" : "") + value.toString(16);
+	}
 
-	    nopropagation$1();
-	    for (i = 0; i < n; ++i) {
-	      t = touches[i], p = touch(this, touches, t.identifier);
-	      p = [p, this.__zoom.invert(p), t.identifier];
-	      if (!g.touch0) { g.touch0 = p, started = true, g.taps = 1 + !!touchstarting; }
-	      else if (!g.touch1 && g.touch0[2] !== p[2]) { g.touch1 = p, g.taps = 0; }
-	    }
+	function hsla(h, s, l, a) {
+	  if (a <= 0) h = s = l = NaN;else if (l <= 0 || l >= 1) h = s = NaN;else if (s <= 0) h = NaN;
+	  return new Hsl(h, s, l, a);
+	}
 
-	    if (touchstarting) { touchstarting = clearTimeout(touchstarting); }
+	function hslConvert(o) {
+	  if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
+	  if (!(o instanceof Color)) o = color(o);
+	  if (!o) return new Hsl();
+	  if (o instanceof Hsl) return o;
+	  o = o.rgb();
+	  var r = o.r / 255,
+	      g = o.g / 255,
+	      b = o.b / 255,
+	      min = Math.min(r, g, b),
+	      max = Math.max(r, g, b),
+	      h = NaN,
+	      s = max - min,
+	      l = (max + min) / 2;
 
-	    if (started) {
-	      if (g.taps < 2) { touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay); }
-	      interrupt(this);
-	      g.start();
-	    }
+	  if (s) {
+	    if (r === max) h = (g - b) / s + (g < b) * 6;else if (g === max) h = (b - r) / s + 2;else h = (r - g) / s + 4;
+	    s /= l < 0.5 ? max + min : 2 - max - min;
+	    h *= 60;
+	  } else {
+	    s = l > 0 && l < 1 ? 0 : h;
 	  }
 
-	  function touchmoved() {
-	    if (!this.__zooming) { return; }
-	    var g = gesture(this, arguments),
-	        touches = event.changedTouches,
-	        n = touches.length, i, t, p, l;
-
-	    noevent$1();
-	    if (touchstarting) { touchstarting = clearTimeout(touchstarting); }
-	    g.taps = 0;
-	    for (i = 0; i < n; ++i) {
-	      t = touches[i], p = touch(this, touches, t.identifier);
-	      if (g.touch0 && g.touch0[2] === t.identifier) { g.touch0[0] = p; }
-	      else if (g.touch1 && g.touch1[2] === t.identifier) { g.touch1[0] = p; }
-	    }
-	    t = g.that.__zoom;
-	    if (g.touch1) {
-	      var p0 = g.touch0[0], l0 = g.touch0[1],
-	          p1 = g.touch1[0], l1 = g.touch1[1],
-	          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
-	          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
-	      t = scale(t, Math.sqrt(dp / dl));
-	      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
-	      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
-	    }
-	    else if (g.touch0) { p = g.touch0[0], l = g.touch0[1]; }
-	    else { return; }
-	    g.zoom("touch", constrain(translate(t, p, l), g.extent, translateExtent));
-	  }
+	  return new Hsl(h, s, l, o.opacity);
+	}
+	function hsl(h, s, l, opacity) {
+	  return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
+	}
 
-	  function touchended() {
-	    if (!this.__zooming) { return; }
-	    var g = gesture(this, arguments),
-	        touches = event.changedTouches,
-	        n = touches.length, i, t;
+	function Hsl(h, s, l, opacity) {
+	  this.h = +h;
+	  this.s = +s;
+	  this.l = +l;
+	  this.opacity = +opacity;
+	}
 
-	    nopropagation$1();
-	    if (touchending) { clearTimeout(touchending); }
-	    touchending = setTimeout(function() { touchending = null; }, touchDelay);
-	    for (i = 0; i < n; ++i) {
-	      t = touches[i];
-	      if (g.touch0 && g.touch0[2] === t.identifier) { delete g.touch0; }
-	      else if (g.touch1 && g.touch1[2] === t.identifier) { delete g.touch1; }
-	    }
-	    if (g.touch1 && !g.touch0) { g.touch0 = g.touch1, delete g.touch1; }
-	    if (g.touch0) { g.touch0[1] = this.__zoom.invert(g.touch0[0]); }
-	    else {
-	      g.end();
-	      // If this was a dbltap, reroute to the (optional) dblclick.zoom handler.
-	      if (g.taps === 2) {
-	        var p = select(this).on("dblclick.zoom");
-	        if (p) { p.apply(this, arguments); }
-	      }
-	    }
+	define(Hsl, hsl, extend$3(Color, {
+	  brighter: function brighter(k) {
+	    k = k == null ? _brighter : Math.pow(_brighter, k);
+	    return new Hsl(this.h, this.s, this.l * k, this.opacity);
+	  },
+	  darker: function darker(k) {
+	    k = k == null ? _darker : Math.pow(_darker, k);
+	    return new Hsl(this.h, this.s, this.l * k, this.opacity);
+	  },
+	  rgb: function rgb() {
+	    var h = this.h % 360 + (this.h < 0) * 360,
+	        s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
+	        l = this.l,
+	        m2 = l + (l < 0.5 ? l : 1 - l) * s,
+	        m1 = 2 * l - m2;
+	    return new Rgb(hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2), hsl2rgb(h, m1, m2), hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2), this.opacity);
+	  },
+	  displayable: function displayable() {
+	    return (0 <= this.s && this.s <= 1 || isNaN(this.s)) && 0 <= this.l && this.l <= 1 && 0 <= this.opacity && this.opacity <= 1;
+	  },
+	  formatHsl: function formatHsl() {
+	    var a = this.opacity;
+	    a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
+	    return (a === 1 ? "hsl(" : "hsla(") + (this.h || 0) + ", " + (this.s || 0) * 100 + "%, " + (this.l || 0) * 100 + "%" + (a === 1 ? ")" : ", " + a + ")");
 	  }
+	}));
+	/* From FvD 13.37, CSS Color Module Level 3 */
 
-	  zoom.wheelDelta = function(_) {
-	    return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant$3(+_), zoom) : wheelDelta;
-	  };
-
-	  zoom.filter = function(_) {
-	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$3(!!_), zoom) : filter;
-	  };
+	function hsl2rgb(h, m1, m2) {
+	  return (h < 60 ? m1 + (m2 - m1) * h / 60 : h < 180 ? m2 : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60 : m1) * 255;
+	}
 
-	  zoom.touchable = function(_) {
-	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$3(!!_), zoom) : touchable;
+	var constant$1 = (function (x) {
+	  return function () {
+	    return x;
 	  };
+	});
 
-	  zoom.extent = function(_) {
-	    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$3([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+	function linear$2(a, d) {
+	  return function (t) {
+	    return a + t * d;
 	  };
+	}
 
-	  zoom.scaleExtent = function(_) {
-	    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+	function exponential(a, b, y) {
+	  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function (t) {
+	    return Math.pow(a + t * b, y);
 	  };
-
-	  zoom.translateExtent = function(_) {
-	    return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
+	}
+	function gamma(y) {
+	  return (y = +y) === 1 ? nogamma : function (a, b) {
+	    return b - a ? exponential(a, b, y) : constant$1(isNaN(a) ? b : a);
 	  };
+	}
+	function nogamma(a, b) {
+	  var d = b - a;
+	  return d ? linear$2(a, d) : constant$1(isNaN(a) ? b : a);
+	}
 
-	  zoom.constrain = function(_) {
-	    return arguments.length ? (constrain = _, zoom) : constrain;
-	  };
+	var d3_interpolateRgb = (function rgbGamma(y) {
+	  var color = gamma(y);
 
-	  zoom.duration = function(_) {
-	    return arguments.length ? (duration = +_, zoom) : duration;
-	  };
+	  function rgb$1(start, end) {
+	    var r = color((start = rgb(start)).r, (end = rgb(end)).r),
+	        g = color(start.g, end.g),
+	        b = color(start.b, end.b),
+	        opacity = nogamma(start.opacity, end.opacity);
+	    return function (t) {
+	      start.r = r(t);
+	      start.g = g(t);
+	      start.b = b(t);
+	      start.opacity = opacity(t);
+	      return start + "";
+	    };
+	  }
 
-	  zoom.interpolate = function(_) {
-	    return arguments.length ? (interpolate = _, zoom) : interpolate;
-	  };
+	  rgb$1.gamma = rgbGamma;
+	  return rgb$1;
+	})(1);
 
-	  zoom.on = function() {
-	    var value = listeners.on.apply(listeners, arguments);
-	    return value === listeners ? zoom : value;
-	  };
+	function numberArray (a, b) {
+	  if (!b) b = [];
+	  var n = a ? Math.min(b.length, a.length) : 0,
+	      c = b.slice(),
+	      i;
+	  return function (t) {
+	    for (i = 0; i < n; ++i) {
+	      c[i] = a[i] * (1 - t) + b[i] * t;
+	    }
 
-	  zoom.clickDistance = function(_) {
-	    return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
+	    return c;
 	  };
-
-	  return zoom;
+	}
+	function isNumberArray(x) {
+	  return ArrayBuffer.isView(x) && !(x instanceof DataView);
 	}
 
-	/*
-	    Bypasses features of D3's default projection stream pipeline that are unnecessary:
-	    * Antimeridian clipping
-	    * Spherical rotation
-	    * Resampling
-	*/
-	function geoRawMercator() {
-	    var project = mercatorRaw;
-	    var k = 512 / Math.PI; // scale
-	    var x = 0;
-	    var y = 0; // translate
-	    var clipExtent = [[0, 0], [0, 0]];
-
+	function genericArray(a, b) {
+	  var nb = b ? b.length : 0,
+	      na = a ? Math.min(nb, a.length) : 0,
+	      x = new Array(na),
+	      c = new Array(nb),
+	      i;
 
-	    function projection(point) {
-	        point = project(point[0] * Math.PI / 180, point[1] * Math.PI / 180);
-	        return [point[0] * k + x, y - point[1] * k];
-	    }
+	  for (i = 0; i < na; ++i) {
+	    x[i] = interpolate$1(a[i], b[i]);
+	  }
 
+	  for (; i < nb; ++i) {
+	    c[i] = b[i];
+	  }
 
-	    projection.invert = function(point) {
-	        point = project.invert((point[0] - x) / k, (y - point[1]) / k);
-	        return point && [point[0] * 180 / Math.PI, point[1] * 180 / Math.PI];
-	    };
+	  return function (t) {
+	    for (i = 0; i < na; ++i) {
+	      c[i] = x[i](t);
+	    }
 
+	    return c;
+	  };
+	}
 
-	    projection.scale = function(_) {
-	        if (!arguments.length) { return k; }
-	        k = +_;
-	        return projection;
-	    };
+	function date (a, b) {
+	  var d = new Date();
+	  return a = +a, b = +b, function (t) {
+	    return d.setTime(a * (1 - t) + b * t), d;
+	  };
+	}
 
+	function d3_interpolateNumber (a, b) {
+	  return a = +a, b = +b, function (t) {
+	    return a * (1 - t) + b * t;
+	  };
+	}
 
-	    projection.translate = function(_) {
-	        if (!arguments.length) { return [x, y]; }
-	        x = +_[0];
-	        y = +_[1];
-	        return projection;
-	    };
+	function object (a, b) {
+	  var i = {},
+	      c = {},
+	      k;
+	  if (a === null || _typeof(a) !== "object") a = {};
+	  if (b === null || _typeof(b) !== "object") b = {};
 
+	  for (k in b) {
+	    if (k in a) {
+	      i[k] = interpolate$1(a[k], b[k]);
+	    } else {
+	      c[k] = b[k];
+	    }
+	  }
 
-	    projection.clipExtent = function(_) {
-	        if (!arguments.length) { return clipExtent; }
-	        clipExtent = _;
-	        return projection;
-	    };
+	  return function (t) {
+	    for (k in i) {
+	      c[k] = i[k](t);
+	    }
 
+	    return c;
+	  };
+	}
 
-	    projection.transform = function(obj) {
-	        if (!arguments.length) { return identity$2.translate(x, y).scale(k); }
-	        x = +obj.x;
-	        y = +obj.y;
-	        k = +obj.k;
-	        return projection;
-	    };
+	var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
+	    reB = new RegExp(reA.source, "g");
 
+	function zero(b) {
+	  return function () {
+	    return b;
+	  };
+	}
 
-	    projection.stream = d3_geoTransform({
-	        point: function(x, y) {
-	            var vec = projection([x, y]);
-	            this.stream.point(vec[0], vec[1]);
-	        }
-	    }).stream;
+	function one(b) {
+	  return function (t) {
+	    return b(t) + "";
+	  };
+	}
 
+	function interpolateString (a, b) {
+	  var bi = reA.lastIndex = reB.lastIndex = 0,
+	      // scan index for next number in b
+	  am,
+	      // current match in a
+	  bm,
+	      // current match in b
+	  bs,
+	      // string preceding current number in b, if any
+	  i = -1,
+	      // index in s
+	  s = [],
+	      // string constants and placeholders
+	  q = []; // number interpolators
+	  // Coerce inputs to strings.
 
-	    return projection;
-	}
+	  a = a + "", b = b + ""; // Interpolate pairs of numbers in a & b.
 
-	function geoOrthoNormalizedDotProduct(a, b, origin) {
-	    if (geoVecEqual(origin, a) || geoVecEqual(origin, b)) {
-	        return 1;  // coincident points, treat as straight and try to remove
+	  while ((am = reA.exec(a)) && (bm = reB.exec(b))) {
+	    if ((bs = bm.index) > bi) {
+	      // a string precedes the next number in b
+	      bs = b.slice(bi, bs);
+	      if (s[i]) s[i] += bs; // coalesce with previous string
+	      else s[++i] = bs;
 	    }
-	    return geoVecNormalizedDot(a, b, origin);
-	}
 
-
-	function geoOrthoFilterDotProduct(dotp, epsilon, lowerThreshold, upperThreshold, allowStraightAngles) {
-	    var val = Math.abs(dotp);
-	    if (val < epsilon) {
-	        return 0;      // already orthogonal
-	    } else if (allowStraightAngles && Math.abs(val-1) < epsilon) {
-	        return 0;      // straight angle, which is okay in this case
-	    } else if (val < lowerThreshold || val > upperThreshold) {
-	        return dotp;   // can be adjusted
+	    if ((am = am[0]) === (bm = bm[0])) {
+	      // numbers in a & b match
+	      if (s[i]) s[i] += bm; // coalesce with previous string
+	      else s[++i] = bm;
 	    } else {
-	        return null;   // ignore vertex
+	      // interpolate non-matching numbers
+	      s[++i] = null;
+	      q.push({
+	        i: i,
+	        x: d3_interpolateNumber(am, bm)
+	      });
 	    }
-	}
 
+	    bi = reB.lastIndex;
+	  } // Add remains of b.
 
-	function geoOrthoCalcScore(points, isClosed, epsilon, threshold) {
-	    var score = 0;
-	    var first = isClosed ? 0 : 1;
-	    var last = isClosed ? points.length : points.length - 1;
-	    var coords = points.map(function(p) { return p.coord; });
 
-	    var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-	    var upperThreshold = Math.cos(threshold * Math.PI / 180);
+	  if (bi < b.length) {
+	    bs = b.slice(bi);
+	    if (s[i]) s[i] += bs; // coalesce with previous string
+	    else s[++i] = bs;
+	  } // Special optimization for only a single match.
+	  // Otherwise, interpolate each of the numbers and rejoin the string.
 
-	    for (var i = first; i < last; i++) {
-	        var a = coords[(i - 1 + coords.length) % coords.length];
-	        var origin = coords[i];
-	        var b = coords[(i + 1) % coords.length];
 
-	        var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold);
-	        if (dotp === null) { continue; }    // ignore vertex
-	        score = score + 2.0 * Math.min(Math.abs(dotp - 1.0), Math.min(Math.abs(dotp), Math.abs(dotp + 1)));
+	  return s.length < 2 ? q[0] ? one(q[0].x) : zero(b) : (b = q.length, function (t) {
+	    for (var i = 0, o; i < b; ++i) {
+	      s[(o = q[i]).i] = o.x(t);
 	    }
 
-	    return score;
+	    return s.join("");
+	  });
 	}
 
-	// returns the maximum angle less than `lessThan` between the actual corner and a 0° or 90° corner
-	function geoOrthoMaxOffsetAngle(coords, isClosed, lessThan) {
-	    var max = -Infinity;
-
-	    var first = isClosed ? 0 : 1;
-	    var last = isClosed ? coords.length : coords.length - 1;
-
-	    for (var i = first; i < last; i++) {
-	        var a = coords[(i - 1 + coords.length) % coords.length];
-	        var origin = coords[i];
-	        var b = coords[(i + 1) % coords.length];
-	        var normalizedDotP = geoOrthoNormalizedDotProduct(a, b, origin);
-
-	        var angle = Math.acos(Math.abs(normalizedDotP)) * 180 / Math.PI;
+	function interpolate$1 (a, b) {
+	  var t = _typeof(b),
+	      c;
 
-	        if (angle > 45) { angle = 90 - angle; }
-
-	        if (angle >= lessThan) { continue; }
-
-	        if (angle > max) { max = angle; }
-	    }
-
-	    if (max === -Infinity) { return null; }
-
-	    return max;
+	  return b == null || t === "boolean" ? constant$1(b) : (t === "number" ? d3_interpolateNumber : t === "string" ? (c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString : b instanceof color ? d3_interpolateRgb : b instanceof Date ? date : isNumberArray(b) ? numberArray : Array.isArray(b) ? genericArray : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object : d3_interpolateNumber)(a, b);
 	}
 
+	function interpolateRound (a, b) {
+	  return a = +a, b = +b, function (t) {
+	    return Math.round(a * (1 - t) + b * t);
+	  };
+	}
 
-	// similar to geoOrthoCalcScore, but returns quickly if there is something to do
-	function geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles) {
-	    var score = null;
-	    var first = isClosed ? 0 : 1;
-	    var last = isClosed ? coords.length : coords.length - 1;
+	var degrees = 180 / Math.PI;
+	var identity$3 = {
+	  translateX: 0,
+	  translateY: 0,
+	  rotate: 0,
+	  skewX: 0,
+	  scaleX: 1,
+	  scaleY: 1
+	};
+	function decompose (a, b, c, d, e, f) {
+	  var scaleX, scaleY, skewX;
+	  if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
+	  if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
+	  if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
+	  if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
+	  return {
+	    translateX: e,
+	    translateY: f,
+	    rotate: Math.atan2(b, a) * degrees,
+	    skewX: Math.atan(skewX) * degrees,
+	    scaleX: scaleX,
+	    scaleY: scaleY
+	  };
+	}
 
-	    var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-	    var upperThreshold = Math.cos(threshold * Math.PI / 180);
+	var svgNode;
+	/* eslint-disable no-undef */
 
-	    for (var i = first; i < last; i++) {
-	        var a = coords[(i - 1 + coords.length) % coords.length];
-	        var origin = coords[i];
-	        var b = coords[(i + 1) % coords.length];
+	function parseCss(value) {
+	  var m = new (typeof DOMMatrix === "function" ? DOMMatrix : WebKitCSSMatrix)(value + "");
+	  return m.isIdentity ? identity$3 : decompose(m.a, m.b, m.c, m.d, m.e, m.f);
+	}
+	function parseSvg(value) {
+	  if (value == null) return identity$3;
+	  if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
+	  svgNode.setAttribute("transform", value);
+	  if (!(value = svgNode.transform.baseVal.consolidate())) return identity$3;
+	  value = value.matrix;
+	  return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
+	}
+
+	function interpolateTransform(parse, pxComma, pxParen, degParen) {
+	  function pop(s) {
+	    return s.length ? s.pop() + " " : "";
+	  }
 
-	        var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold, allowStraightAngles);
-	        if (dotp === null) { continue; }        // ignore vertex
-	        if (Math.abs(dotp) > 0) { return 1; }   // something to do
-	        score = 0;                          // already square
+	  function translate(xa, ya, xb, yb, s, q) {
+	    if (xa !== xb || ya !== yb) {
+	      var i = s.push("translate(", null, pxComma, null, pxParen);
+	      q.push({
+	        i: i - 4,
+	        x: d3_interpolateNumber(xa, xb)
+	      }, {
+	        i: i - 2,
+	        x: d3_interpolateNumber(ya, yb)
+	      });
+	    } else if (xb || yb) {
+	      s.push("translate(" + xb + pxComma + yb + pxParen);
 	    }
+	  }
 
-	    return score;
-	}
+	  function rotate(a, b, s, q) {
+	    if (a !== b) {
+	      if (a - b > 180) b += 360;else if (b - a > 180) a += 360; // shortest path
 
-	// Returns true if a and b have the same elements at the same indices.
-	function utilArrayIdentical(a, b) {
-	    // an array is always identical to itself
-	    if (a === b) { return true; }
+	      q.push({
+	        i: s.push(pop(s) + "rotate(", null, degParen) - 2,
+	        x: d3_interpolateNumber(a, b)
+	      });
+	    } else if (b) {
+	      s.push(pop(s) + "rotate(" + b + degParen);
+	    }
+	  }
 
-	    var i = a.length;
-	    if (i !== b.length) { return false; }
-	    while (i--) {
-	        if (a[i] !== b[i]) { return false; }
+	  function skewX(a, b, s, q) {
+	    if (a !== b) {
+	      q.push({
+	        i: s.push(pop(s) + "skewX(", null, degParen) - 2,
+	        x: d3_interpolateNumber(a, b)
+	      });
+	    } else if (b) {
+	      s.push(pop(s) + "skewX(" + b + degParen);
 	    }
-	    return true;
+	  }
+
+	  function scale(xa, ya, xb, yb, s, q) {
+	    if (xa !== xb || ya !== yb) {
+	      var i = s.push(pop(s) + "scale(", null, ",", null, ")");
+	      q.push({
+	        i: i - 4,
+	        x: d3_interpolateNumber(xa, xb)
+	      }, {
+	        i: i - 2,
+	        x: d3_interpolateNumber(ya, yb)
+	      });
+	    } else if (xb !== 1 || yb !== 1) {
+	      s.push(pop(s) + "scale(" + xb + "," + yb + ")");
+	    }
+	  }
+
+	  return function (a, b) {
+	    var s = [],
+	        // string constants and placeholders
+	    q = []; // number interpolators
+
+	    a = parse(a), b = parse(b);
+	    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
+	    rotate(a.rotate, b.rotate, s, q);
+	    skewX(a.skewX, b.skewX, s, q);
+	    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
+	    a = b = null; // gc
+
+	    return function (t) {
+	      var i = -1,
+	          n = q.length,
+	          o;
+
+	      while (++i < n) {
+	        s[(o = q[i]).i] = o.x(t);
+	      }
+
+	      return s.join("");
+	    };
+	  };
 	}
 
-	// http://2ality.com/2015/01/es6-set-operations.html
+	var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
+	var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
 
-	// Difference (a \ b): create a set that contains those elements of set a that are not in set b.
-	// This operation is also sometimes called minus (-).
-	// var a = [1,2,3];
-	// var b = [4,3,2];
-	// utilArrayDifference(a, b)
-	//   [1]
-	// utilArrayDifference(b, a)
-	//   [4]
-	function utilArrayDifference(a, b) {
-	    var other = new Set(b);
-	    return Array.from(new Set(a))
-	        .filter(function(v) { return !other.has(v); });
+	var epsilon2 = 1e-12;
+
+	function cosh(x) {
+	  return ((x = Math.exp(x)) + 1 / x) / 2;
 	}
 
-	// Intersection (a ∩ b): create a set that contains those elements of set a that are also in set b.
-	// var a = [1,2,3];
-	// var b = [4,3,2];
-	// utilArrayIntersection(a, b)
-	//   [2,3]
-	function utilArrayIntersection(a, b) {
-	    var other = new Set(b);
-	    return Array.from(new Set(a))
-	        .filter(function(v) { return other.has(v); });
+	function sinh(x) {
+	  return ((x = Math.exp(x)) - 1 / x) / 2;
 	}
 
-	// Union (a ∪ b): create a set that contains the elements of both set a and set b.
-	// var a = [1,2,3];
-	// var b = [4,3,2];
-	// utilArrayUnion(a, b)
-	//   [1,2,3,4]
-	function utilArrayUnion(a, b) {
-	    var result = new Set(a);
-	    b.forEach(function(v) { result.add(v); });
-	    return Array.from(result);
+	function tanh(x) {
+	  return ((x = Math.exp(2 * x)) - 1) / (x + 1);
 	}
 
-	// Returns an Array with all the duplicates removed
-	// var a = [1,1,2,3,3];
-	// utilArrayUniq(a)
-	//   [1,2,3]
-	function utilArrayUniq(a) {
-	    return Array.from(new Set(a));
+	var interpolateZoom = (function zoomRho(rho, rho2, rho4) {
+	  // p0 = [ux0, uy0, w0]
+	  // p1 = [ux1, uy1, w1]
+	  function zoom(p0, p1) {
+	    var ux0 = p0[0],
+	        uy0 = p0[1],
+	        w0 = p0[2],
+	        ux1 = p1[0],
+	        uy1 = p1[1],
+	        w1 = p1[2],
+	        dx = ux1 - ux0,
+	        dy = uy1 - uy0,
+	        d2 = dx * dx + dy * dy,
+	        i,
+	        S; // Special case for u0 ≅ u1.
+
+	    if (d2 < epsilon2) {
+	      S = Math.log(w1 / w0) / rho;
+
+	      i = function i(t) {
+	        return [ux0 + t * dx, uy0 + t * dy, w0 * Math.exp(rho * t * S)];
+	      };
+	    } // General case.
+	    else {
+	      var d1 = Math.sqrt(d2),
+	          b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
+	          b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
+	          r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
+	          r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
+	      S = (r1 - r0) / rho;
+
+	      i = function i(t) {
+	        var s = t * S,
+	            coshr0 = cosh(r0),
+	            u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
+	        return [ux0 + u * dx, uy0 + u * dy, w0 * coshr0 / cosh(rho * s + r0)];
+	      };
+	    }
+
+	    i.duration = S * 1000 * rho / Math.SQRT2;
+	    return i;
+	  }
+
+	  zoom.rho = function (_) {
+	    var _1 = Math.max(1e-3, +_),
+	        _2 = _1 * _1,
+	        _4 = _2 * _2;
+
+	    return zoomRho(_1, _2, _4);
+	  };
+
+	  return zoom;
+	})(Math.SQRT2, 2, 4);
+
+	function d3_quantize (interpolator, n) {
+	  var samples = new Array(n);
+
+	  for (var i = 0; i < n; ++i) {
+	    samples[i] = interpolator(i / (n - 1));
+	  }
+
+	  return samples;
 	}
 
+	var $$t = _export;
+	var bind$4 = functionBind;
 
-	// Splits array into chunks of given chunk size
-	// var a = [1,2,3,4,5,6,7];
-	// utilArrayChunk(a, 3);
-	//   [[1,2,3],[4,5,6],[7]];
-	function utilArrayChunk(a, chunkSize) {
-	    if (!chunkSize || chunkSize < 0) { return [a.slice()]; }
+	// `Function.prototype.bind` method
+	// https://tc39.es/ecma262/#sec-function.prototype.bind
+	$$t({ target: 'Function', proto: true, forced: Function.bind !== bind$4 }, {
+	  bind: bind$4
+	});
 
-	    var result = new Array(Math.ceil(a.length / chunkSize));
-	    return Array.from(result, function(item, i) {
-	        return a.slice(i * chunkSize, i * chunkSize + chunkSize);
-	    });
+	var frame = 0,
+	    // is an animation frame pending?
+	timeout = 0,
+	    // is a timeout pending?
+	interval = 0,
+	    // are any timers active?
+	pokeDelay = 1000,
+	    // how frequently we check for clock skew
+	taskHead,
+	    taskTail,
+	    clockLast = 0,
+	    clockNow = 0,
+	    clockSkew = 0,
+	    clock = (typeof performance === "undefined" ? "undefined" : _typeof(performance)) === "object" && performance.now ? performance : Date,
+	    setFrame = (typeof window === "undefined" ? "undefined" : _typeof(window)) === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function (f) {
+	  setTimeout(f, 17);
+	};
+	function now$1() {
+	  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
 	}
 
+	function clearNow() {
+	  clockNow = 0;
+	}
 
-	// Flattens two level array into a single level
-	// var a = [[1,2,3],[4,5,6],[7]];
-	// utilArrayFlatten(a);
-	//   [1,2,3,4,5,6,7];
-	function utilArrayFlatten(a) {
-	    return a.reduce(function(acc, val) {
-	        return acc.concat(val);
-	    }, []);
+	function Timer() {
+	  this._call = this._time = this._next = null;
 	}
+	Timer.prototype = timer.prototype = {
+	  constructor: Timer,
+	  restart: function restart(callback, delay, time) {
+	    if (typeof callback !== "function") throw new TypeError("callback is not a function");
+	    time = (time == null ? now$1() : +time) + (delay == null ? 0 : +delay);
 
+	    if (!this._next && taskTail !== this) {
+	      if (taskTail) taskTail._next = this;else taskHead = this;
+	      taskTail = this;
+	    }
 
-	// Groups the items of the Array according to the given key
-	// `key` can be passed as a property or as a key function
-	//
-	// var pets = [
-	//     { type: 'Dog', name: 'Spot' },
-	//     { type: 'Cat', name: 'Tiger' },
-	//     { type: 'Dog', name: 'Rover' },
-	//     { type: 'Cat', name: 'Leo' }
-	// ];
-	//
-	// utilArrayGroupBy(pets, 'type')
-	//   {
-	//     'Dog': [{type: 'Dog', name: 'Spot'}, {type: 'Dog', name: 'Rover'}],
-	//     'Cat': [{type: 'Cat', name: 'Tiger'}, {type: 'Cat', name: 'Leo'}]
-	//   }
-	//
-	// utilArrayGroupBy(pets, function(item) { return item.name.length; })
-	//   {
-	//     3: [{type: 'Cat', name: 'Leo'}],
-	//     4: [{type: 'Dog', name: 'Spot'}],
-	//     5: [{type: 'Cat', name: 'Tiger'}, {type: 'Dog', name: 'Rover'}]
-	//   }
-	function utilArrayGroupBy(a, key) {
-	    return a.reduce(function(acc, item) {
-	        var group = (typeof key === 'function') ? key(item) : item[key];
-	        (acc[group] = acc[group] || []).push(item);
-	        return acc;
-	    }, {});
+	    this._call = callback;
+	    this._time = time;
+	    sleep();
+	  },
+	  stop: function stop() {
+	    if (this._call) {
+	      this._call = null;
+	      this._time = Infinity;
+	      sleep();
+	    }
+	  }
+	};
+	function timer(callback, delay, time) {
+	  var t = new Timer();
+	  t.restart(callback, delay, time);
+	  return t;
 	}
+	function timerFlush() {
+	  now$1(); // Get the current time, if not already set.
 
+	  ++frame; // Pretend we’ve set an alarm, if we haven’t already.
 
-	// Returns an Array with all the duplicates removed
-	// where uniqueness determined by the given key
-	// `key` can be passed as a property or as a key function
-	//
-	// var pets = [
-	//     { type: 'Dog', name: 'Spot' },
-	//     { type: 'Cat', name: 'Tiger' },
-	//     { type: 'Dog', name: 'Rover' },
-	//     { type: 'Cat', name: 'Leo' }
-	// ];
-	//
-	// utilArrayUniqBy(pets, 'type')
-	//   [
-	//     { type: 'Dog', name: 'Spot' },
-	//     { type: 'Cat', name: 'Tiger' }
-	//   ]
-	//
-	// utilArrayUniqBy(pets, function(item) { return item.name.length; })
-	//   [
-	//     { type: 'Dog', name: 'Spot' },
-	//     { type: 'Cat', name: 'Tiger' },
-	//     { type: 'Cat', name: 'Leo' }
-	//   }
-	function utilArrayUniqBy(a, key) {
-	    var seen = new Set();
-	    return a.reduce(function(acc, item) {
-	        var val = (typeof key === 'function') ? key(item) : item[key];
-	        if (val && !seen.has(val)) {
-	            seen.add(val);
-	            acc.push(item);
-	        }
-	        return acc;
-	    }, []);
+	  var t = taskHead,
+	      e;
+
+	  while (t) {
+	    if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
+	    t = t._next;
+	  }
+
+	  --frame;
 	}
 
-	var remove$1 = removeDiacritics;
+	function wake() {
+	  clockNow = (clockLast = clock.now()) + clockSkew;
+	  frame = timeout = 0;
 
-	var replacementList = [
-	  {
-	    base: ' ',
-	    chars: "\u00A0",
-	  }, {
-	    base: '0',
-	    chars: "\u07C0",
-	  }, {
-	    base: 'A',
-	    chars: "\u24B6\uFF21\u00C0\u00C1\u00C2\u1EA6\u1EA4\u1EAA\u1EA8\u00C3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\u00C4\u01DE\u1EA2\u00C5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F",
-	  }, {
-	    base: 'AA',
-	    chars: "\uA732",
-	  }, {
-	    base: 'AE',
-	    chars: "\u00C6\u01FC\u01E2",
-	  }, {
-	    base: 'AO',
-	    chars: "\uA734",
-	  }, {
-	    base: 'AU',
-	    chars: "\uA736",
-	  }, {
-	    base: 'AV',
-	    chars: "\uA738\uA73A",
-	  }, {
-	    base: 'AY',
-	    chars: "\uA73C",
-	  }, {
-	    base: 'B',
-	    chars: "\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0181",
-	  }, {
-	    base: 'C',
-	    chars: "\u24b8\uff23\uA73E\u1E08\u0106\u0043\u0108\u010A\u010C\u00C7\u0187\u023B",
-	  }, {
-	    base: 'D',
-	    chars: "\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018A\u0189\u1D05\uA779",
-	  }, {
-	    base: 'Dh',
-	    chars: "\u00D0",
-	  }, {
-	    base: 'DZ',
-	    chars: "\u01F1\u01C4",
-	  }, {
-	    base: 'Dz',
-	    chars: "\u01F2\u01C5",
-	  }, {
-	    base: 'E',
-	    chars: "\u025B\u24BA\uFF25\u00C8\u00C9\u00CA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\u00CB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E\u1D07",
-	  }, {
-	    base: 'F',
-	    chars: "\uA77C\u24BB\uFF26\u1E1E\u0191\uA77B",
-	  }, {
-	    base: 'G',
-	    chars: "\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E\u0262",
-	  }, {
-	    base: 'H',
-	    chars: "\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D",
-	  }, {
-	    base: 'I',
-	    chars: "\u24BE\uFF29\xCC\xCD\xCE\u0128\u012A\u012C\u0130\xCF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197",
-	  }, {
-	    base: 'J',
-	    chars: "\u24BF\uFF2A\u0134\u0248\u0237",
-	  }, {
-	    base: 'K',
-	    chars: "\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2",
-	  }, {
-	    base: 'L',
-	    chars: "\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780",
-	  }, {
-	    base: 'LJ',
-	    chars: "\u01C7",
-	  }, {
-	    base: 'Lj',
-	    chars: "\u01C8",
-	  }, {
-	    base: 'M',
-	    chars: "\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C\u03FB",
-	  }, {
-	    base: 'N',
-	    chars: "\uA7A4\u0220\u24C3\uFF2E\u01F8\u0143\xD1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u019D\uA790\u1D0E",
-	  }, {
-	    base: 'NJ',
-	    chars: "\u01CA",
-	  }, {
-	    base: 'Nj',
-	    chars: "\u01CB",
-	  }, {
-	    base: 'O',
-	    chars: "\u24C4\uFF2F\xD2\xD3\xD4\u1ED2\u1ED0\u1ED6\u1ED4\xD5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\xD6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\xD8\u01FE\u0186\u019F\uA74A\uA74C",
-	  }, {
-	    base: 'OE',
-	    chars: "\u0152",
-	  }, {
-	    base: 'OI',
-	    chars: "\u01A2",
-	  }, {
-	    base: 'OO',
-	    chars: "\uA74E",
-	  }, {
-	    base: 'OU',
-	    chars: "\u0222",
-	  }, {
-	    base: 'P',
-	    chars: "\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754",
-	  }, {
-	    base: 'Q',
-	    chars: "\u24C6\uFF31\uA756\uA758\u024A",
-	  }, {
-	    base: 'R',
-	    chars: "\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782",
-	  }, {
-	    base: 'S',
-	    chars: "\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784",
-	  }, {
-	    base: 'T',
-	    chars: "\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786",
-	  }, {
-	    base: 'Th',
-	    chars: "\u00DE",
-	  }, {
-	    base: 'TZ',
-	    chars: "\uA728",
-	  }, {
-	    base: 'U',
-	    chars: "\u24CA\uFF35\xD9\xDA\xDB\u0168\u1E78\u016A\u1E7A\u016C\xDC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244",
-	  }, {
-	    base: 'V',
-	    chars: "\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245",
-	  }, {
-	    base: 'VY',
-	    chars: "\uA760",
-	  }, {
-	    base: 'W',
-	    chars: "\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72",
-	  }, {
-	    base: 'X',
-	    chars: "\u24CD\uFF38\u1E8A\u1E8C",
-	  }, {
-	    base: 'Y',
-	    chars: "\u24CE\uFF39\u1EF2\xDD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE",
-	  }, {
-	    base: 'Z',
-	    chars: "\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762",
-	  }, {
-	    base: 'a',
-	    chars: "\u24D0\uFF41\u1E9A\u00E0\u00E1\u00E2\u1EA7\u1EA5\u1EAB\u1EA9\u00E3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\u00E4\u01DF\u1EA3\u00E5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250\u0251",
-	  }, {
-	    base: 'aa',
-	    chars: "\uA733",
-	  }, {
-	    base: 'ae',
-	    chars: "\u00E6\u01FD\u01E3",
-	  }, {
-	    base: 'ao',
-	    chars: "\uA735",
-	  }, {
-	    base: 'au',
-	    chars: "\uA737",
-	  }, {
-	    base: 'av',
-	    chars: "\uA739\uA73B",
-	  }, {
-	    base: 'ay',
-	    chars: "\uA73D",
-	  }, {
-	    base: 'b',
-	    chars: "\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253\u0182",
-	  }, {
-	    base: 'c',
-	    chars: "\uFF43\u24D2\u0107\u0109\u010B\u010D\u00E7\u1E09\u0188\u023C\uA73F\u2184",
-	  }, {
-	    base: 'd',
-	    chars: "\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\u018B\u13E7\u0501\uA7AA",
-	  }, {
-	    base: 'dh',
-	    chars: "\u00F0",
-	  }, {
-	    base: 'dz',
-	    chars: "\u01F3\u01C6",
-	  }, {
-	    base: 'e',
-	    chars: "\u24D4\uFF45\u00E8\u00E9\u00EA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\u00EB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u01DD",
-	  }, {
-	    base: 'f',
-	    chars: "\u24D5\uFF46\u1E1F\u0192",
-	  }, {
-	    base: 'ff',
-	    chars: "\uFB00",
-	  }, {
-	    base: 'fi',
-	    chars: "\uFB01",
-	  }, {
-	    base: 'fl',
-	    chars: "\uFB02",
-	  }, {
-	    base: 'ffi',
-	    chars: "\uFB03",
-	  }, {
-	    base: 'ffl',
-	    chars: "\uFB04",
-	  }, {
-	    base: 'g',
-	    chars: "\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\uA77F\u1D79",
-	  }, {
-	    base: 'h',
-	    chars: "\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265",
-	  }, {
-	    base: 'hv',
-	    chars: "\u0195",
-	  }, {
-	    base: 'i',
-	    chars: "\u24D8\uFF49\xEC\xED\xEE\u0129\u012B\u012D\xEF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131",
-	  }, {
-	    base: 'j',
-	    chars: "\u24D9\uFF4A\u0135\u01F0\u0249",
-	  }, {
-	    base: 'k',
-	    chars: "\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3",
-	  }, {
-	    base: 'l',
-	    chars: "\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747\u026D",
-	  }, {
-	    base: 'lj',
-	    chars: "\u01C9",
-	  }, {
-	    base: 'm',
-	    chars: "\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F",
-	  }, {
-	    base: 'n',
-	    chars: "\u24DD\uFF4E\u01F9\u0144\xF1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5\u043B\u0509",
-	  }, {
-	    base: 'nj',
-	    chars: "\u01CC",
-	  }, {
-	    base: 'o',
-	    chars: "\u24DE\uFF4F\xF2\xF3\xF4\u1ED3\u1ED1\u1ED7\u1ED5\xF5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\xF6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\xF8\u01FF\uA74B\uA74D\u0275\u0254\u1D11",
-	  }, {
-	    base: 'oe',
-	    chars: "\u0153",
-	  }, {
-	    base: 'oi',
-	    chars: "\u01A3",
-	  }, {
-	    base: 'oo',
-	    chars: "\uA74F",
-	  }, {
-	    base: 'ou',
-	    chars: "\u0223",
-	  }, {
-	    base: 'p',
-	    chars: "\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755\u03C1",
-	  }, {
-	    base: 'q',
-	    chars: "\u24E0\uFF51\u024B\uA757\uA759",
-	  }, {
-	    base: 'r',
-	    chars: "\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783",
-	  }, {
-	    base: 's',
-	    chars: "\u24E2\uFF53\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B\u0282",
-	  }, {
-	    base: 'ss',
-	    chars: "\xDF",
-	  }, {
-	    base: 't',
-	    chars: "\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787",
-	  }, {
-	    base: 'th',
-	    chars: "\u00FE",
-	  }, {
-	    base: 'tz',
-	    chars: "\uA729",
-	  }, {
-	    base: 'u',
-	    chars: "\u24E4\uFF55\xF9\xFA\xFB\u0169\u1E79\u016B\u1E7B\u016D\xFC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289",
-	  }, {
-	    base: 'v',
-	    chars: "\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C",
-	  }, {
-	    base: 'vy',
-	    chars: "\uA761",
-	  }, {
-	    base: 'w',
-	    chars: "\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73",
-	  }, {
-	    base: 'x',
-	    chars: "\u24E7\uFF58\u1E8B\u1E8D",
-	  }, {
-	    base: 'y',
-	    chars: "\u24E8\uFF59\u1EF3\xFD\u0177\u1EF9\u0233\u1E8F\xFF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF",
-	  }, {
-	    base: 'z',
-	    chars: "\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763",
+	  try {
+	    timerFlush();
+	  } finally {
+	    frame = 0;
+	    nap();
+	    clockNow = 0;
 	  }
-	];
+	}
 
-	var diacriticsMap = {};
-	for (var i$1 = 0; i$1 < replacementList.length; i$1 += 1) {
-	  var chars = replacementList[i$1].chars;
-	  for (var j = 0; j < chars.length; j += 1) {
-	    diacriticsMap[chars[j]] = replacementList[i$1].base;
+	function poke() {
+	  var now = clock.now(),
+	      delay = now - clockLast;
+	  if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
+	}
+
+	function nap() {
+	  var t0,
+	      t1 = taskHead,
+	      t2,
+	      time = Infinity;
+
+	  while (t1) {
+	    if (t1._call) {
+	      if (time > t1._time) time = t1._time;
+	      t0 = t1, t1 = t1._next;
+	    } else {
+	      t2 = t1._next, t1._next = null;
+	      t1 = t0 ? t0._next = t2 : taskHead = t2;
+	    }
 	  }
+
+	  taskTail = t0;
+	  sleep(time);
 	}
 
-	function removeDiacritics(str) {
-	  return str.replace(/[^\u0000-\u007e]/g, function(c) {
-	    return diacriticsMap[c] || c;
+	function sleep(time) {
+	  if (frame) return; // Soonest alarm already set, or will be.
+
+	  if (timeout) timeout = clearTimeout(timeout);
+	  var delay = time - clockNow; // Strictly less than if we recomputed clockNow.
+
+	  if (delay > 24) {
+	    if (time < Infinity) timeout = setTimeout(wake, time - clock.now() - clockSkew);
+	    if (interval) interval = clearInterval(interval);
+	  } else {
+	    if (!interval) clockLast = clock.now(), interval = setInterval(poke, pokeDelay);
+	    frame = 1, setFrame(wake);
+	  }
+	}
+
+	function d3_timeout (callback, delay, time) {
+	  var t = new Timer();
+	  delay = delay == null ? 0 : +delay;
+	  t.restart(function (elapsed) {
+	    t.stop();
+	    callback(elapsed + delay);
+	  }, delay, time);
+	  return t;
+	}
+
+	var emptyOn = dispatch$8("start", "end", "cancel", "interrupt");
+	var emptyTween = [];
+	var CREATED = 0;
+	var SCHEDULED = 1;
+	var STARTING = 2;
+	var STARTED = 3;
+	var RUNNING = 4;
+	var ENDING = 5;
+	var ENDED = 6;
+	function schedule (node, name, id, index, group, timing) {
+	  var schedules = node.__transition;
+	  if (!schedules) node.__transition = {};else if (id in schedules) return;
+	  create$2(node, id, {
+	    name: name,
+	    index: index,
+	    // For context during callback.
+	    group: group,
+	    // For context during callback.
+	    on: emptyOn,
+	    tween: emptyTween,
+	    time: timing.time,
+	    delay: timing.delay,
+	    duration: timing.duration,
+	    ease: timing.ease,
+	    timer: null,
+	    state: CREATED
 	  });
 	}
+	function init(node, id) {
+	  var schedule = get$1(node, id);
+	  if (schedule.state > CREATED) throw new Error("too late; already scheduled");
+	  return schedule;
+	}
+	function set(node, id) {
+	  var schedule = get$1(node, id);
+	  if (schedule.state > STARTED) throw new Error("too late; already running");
+	  return schedule;
+	}
+	function get$1(node, id) {
+	  var schedule = node.__transition;
+	  if (!schedule || !(schedule = schedule[id])) throw new Error("transition not found");
+	  return schedule;
+	}
 
-	var replacementList_1 = replacementList;
-	var diacriticsMap_1 = diacriticsMap;
+	function create$2(node, id, self) {
+	  var schedules = node.__transition,
+	      tween; // Initialize the self timer when the transition is created.
+	  // Note the actual delay is not known until the first callback!
 
-	var diacritics = {
-		remove: remove$1,
-		replacementList: replacementList_1,
-		diacriticsMap: diacriticsMap_1
-	};
+	  schedules[id] = self;
+	  self.timer = timer(schedule, 0, self.time);
 
-	var isArabic_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-	var arabicBlocks = [
-	    [0x0600, 0x06FF],
-	    [0x0750, 0x077F],
-	    [0x08A0, 0x08FF],
-	    [0xFB50, 0xFDFF],
-	    [0xFE70, 0xFEFF],
-	    [0x10E60, 0x10E7F],
-	    [0x1EC70, 0x1ECBF],
-	    [0x1EE00, 0x1EEFF] // Mathematical Alphabetic symbols https://www.unicode.org/charts/PDF/U1EE00.pdf
-	];
-	function isArabic(char) {
-	    if (char.length > 1) {
-	        // allow the newer chars?
-	        throw new Error('isArabic works on only one-character strings');
-	    }
-	    var code = char.charCodeAt(0);
-	    for (var i = 0; i < arabicBlocks.length; i++) {
-	        var block = arabicBlocks[i];
-	        if (code >= block[0] && code <= block[1]) {
-	            return true;
-	        }
+	  function schedule(elapsed) {
+	    self.state = SCHEDULED;
+	    self.timer.restart(start, self.delay, self.time); // If the elapsed delay is less than our first sleep, start immediately.
+
+	    if (self.delay <= elapsed) start(elapsed - self.delay);
+	  }
+
+	  function start(elapsed) {
+	    var i, j, n, o; // If the state is not SCHEDULED, then we previously errored on start.
+
+	    if (self.state !== SCHEDULED) return stop();
+
+	    for (i in schedules) {
+	      o = schedules[i];
+	      if (o.name !== self.name) continue; // While this element already has a starting transition during this frame,
+	      // defer starting an interrupting transition until that transition has a
+	      // chance to tick (and possibly end); see d3/d3-transition#54!
+
+	      if (o.state === STARTED) return d3_timeout(start); // Interrupt the active transition, if any.
+
+	      if (o.state === RUNNING) {
+	        o.state = ENDED;
+	        o.timer.stop();
+	        o.on.call("interrupt", node, node.__data__, o.index, o.group);
+	        delete schedules[i];
+	      } // Cancel any pre-empted transitions.
+	      else if (+i < id) {
+	        o.state = ENDED;
+	        o.timer.stop();
+	        o.on.call("cancel", node, node.__data__, o.index, o.group);
+	        delete schedules[i];
+	      }
+	    } // Defer the first tick to end of the current frame; see d3/d3#1576.
+	    // Note the transition may be canceled after start and before the first tick!
+	    // Note this must be scheduled before the start event; see d3/d3-transition#16!
+	    // Assuming this is successful, subsequent callbacks go straight to tick.
+
+
+	    d3_timeout(function () {
+	      if (self.state === STARTED) {
+	        self.state = RUNNING;
+	        self.timer.restart(tick, self.delay, self.time);
+	        tick(elapsed);
+	      }
+	    }); // Dispatch the start event.
+	    // Note this must be done before the tween are initialized.
+
+	    self.state = STARTING;
+	    self.on.call("start", node, node.__data__, self.index, self.group);
+	    if (self.state !== STARTING) return; // interrupted
+
+	    self.state = STARTED; // Initialize the tween, deleting null tween.
+
+	    tween = new Array(n = self.tween.length);
+
+	    for (i = 0, j = -1; i < n; ++i) {
+	      if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
+	        tween[++j] = o;
+	      }
 	    }
-	    return false;
+
+	    tween.length = j + 1;
+	  }
+
+	  function tick(elapsed) {
+	    var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
+	        i = -1,
+	        n = tween.length;
+
+	    while (++i < n) {
+	      tween[i].call(node, t);
+	    } // Dispatch the end event.
+
+
+	    if (self.state === ENDING) {
+	      self.on.call("end", node, node.__data__, self.index, self.group);
+	      stop();
+	    }
+	  }
+
+	  function stop() {
+	    self.state = ENDED;
+	    self.timer.stop();
+	    delete schedules[id];
+
+	    for (var i in schedules) {
+	      return;
+	    } // eslint-disable-line no-unused-vars
+
+
+	    delete node.__transition;
+	  }
 	}
-	exports.isArabic = isArabic;
-	function isMath(char) {
-	    if (char.length > 2) {
-	        // allow the newer chars?
-	        throw new Error('isMath works on only one-character strings');
+
+	function interrupt (node, name) {
+	  var schedules = node.__transition,
+	      schedule,
+	      active,
+	      empty = true,
+	      i;
+	  if (!schedules) return;
+	  name = name == null ? null : name + "";
+
+	  for (i in schedules) {
+	    if ((schedule = schedules[i]).name !== name) {
+	      empty = false;
+	      continue;
 	    }
-	    var code = char.charCodeAt(0);
-	    return ((code >= 0x660 && code <= 0x66C) || (code >= 0x6F0 && code <= 0x6F9));
+
+	    active = schedule.state > STARTING && schedule.state < ENDING;
+	    schedule.state = ENDED;
+	    schedule.timer.stop();
+	    schedule.on.call(active ? "interrupt" : "cancel", node, node.__data__, schedule.index, schedule.group);
+	    delete schedules[i];
+	  }
+
+	  if (empty) delete node.__transition;
 	}
-	exports.isMath = isMath;
-	});
 
-	var unicodeArabic = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-	var arabicReference = {
-	    "alef": {
-	        "normal": [
-	            "\u0627"
-	        ],
-	        "madda_above": {
-	            "normal": [
-	                "\u0627\u0653",
-	                "\u0622"
-	            ],
-	            "isolated": "\uFE81",
-	            "final": "\uFE82"
-	        },
-	        "hamza_above": {
-	            "normal": [
-	                "\u0627\u0654",
-	                "\u0623"
-	            ],
-	            "isolated": "\uFE83",
-	            "final": "\uFE84"
-	        },
-	        "hamza_below": {
-	            "normal": [
-	                "\u0627\u0655",
-	                "\u0625"
-	            ],
-	            "isolated": "\uFE87",
-	            "final": "\uFE88"
-	        },
-	        "wasla": {
-	            "normal": "\u0671",
-	            "isolated": "\uFB50",
-	            "final": "\uFB51"
-	        },
-	        "wavy_hamza_above": [
-	            "\u0672"
-	        ],
-	        "wavy_hamza_below": [
-	            "\u0627\u065F",
-	            "\u0673"
-	        ],
-	        "high_hamza": [
-	            "\u0675",
-	            "\u0627\u0674"
-	        ],
-	        "indic_two_above": [
-	            "\u0773"
-	        ],
-	        "indic_three_above": [
-	            "\u0774"
-	        ],
-	        "fathatan": {
-	            "normal": [
-	                "\u0627\u064B"
-	            ],
-	            "final": "\uFD3C",
-	            "isolated": "\uFD3D"
-	        },
-	        "isolated": "\uFE8D",
-	        "final": "\uFE8E"
-	    },
-	    "beh": {
-	        "normal": [
-	            "\u0628"
-	        ],
-	        "dotless": [
-	            "\u066E"
-	        ],
-	        "three_dots_horizontally_below": [
-	            "\u0750"
-	        ],
-	        "dot_below_three_dots_above": [
-	            "\u0751"
-	        ],
-	        "three_dots_pointing_upwards_below": [
-	            "\u0752"
-	        ],
-	        "three_dots_pointing_upwards_below_two_dots_above": [
-	            "\u0753"
-	        ],
-	        "two_dots_below_dot_above": [
-	            "\u0754"
-	        ],
-	        "inverted_small_v_below": [
-	            "\u0755"
-	        ],
-	        "small_v": [
-	            "\u0756"
-	        ],
-	        "small_v_below": [
-	            "\u08A0"
-	        ],
-	        "hamza_above": [
-	            "\u08A1"
-	        ],
-	        "small_meem_above": [
-	            "\u08B6"
-	        ],
-	        "isolated": "\uFE8F",
-	        "final": "\uFE90",
-	        "initial": "\uFE91",
-	        "medial": "\uFE92"
-	    },
-	    "teh marbuta": {
-	        "normal": [
-	            "\u0629"
-	        ],
-	        "isolated": "\uFE93",
-	        "final": "\uFE94"
-	    },
-	    "teh": {
-	        "normal": [
-	            "\u062A"
-	        ],
-	        "ring": [
-	            "\u067C"
-	        ],
-	        "three_dots_above_downwards": [
-	            "\u067D"
-	        ],
-	        "small_teh_above": [
-	            "\u08B8"
-	        ],
-	        "isolated": "\uFE95",
-	        "final": "\uFE96",
-	        "initial": "\uFE97",
-	        "medial": "\uFE98"
-	    },
-	    "theh": {
-	        "normal": [
-	            "\u062B"
-	        ],
-	        "isolated": "\uFE99",
-	        "final": "\uFE9A",
-	        "initial": "\uFE9B",
-	        "medial": "\uFE9C"
-	    },
-	    "jeem": {
-	        "normal": [
-	            "\u062C"
-	        ],
-	        "two_dots_above": [
-	            "\u08A2"
-	        ],
-	        "isolated": "\uFE9D",
-	        "final": "\uFE9E",
-	        "initial": "\uFE9F",
-	        "medial": "\uFEA0"
-	    },
-	    "hah": {
-	        "normal": [
-	            "\u062D"
-	        ],
-	        "hamza_above": [
-	            "\u0681"
-	        ],
-	        "two_dots_vertical_above": [
-	            "\u0682"
-	        ],
-	        "three_dots_above": [
-	            "\u0685"
-	        ],
-	        "two_dots_above": [
-	            "\u0757"
-	        ],
-	        "three_dots_pointing_upwards_below": [
-	            "\u0758"
-	        ],
-	        "small_tah_below": [
-	            "\u076E"
-	        ],
-	        "small_tah_two_dots": [
-	            "\u076F"
-	        ],
-	        "small_tah_above": [
-	            "\u0772"
-	        ],
-	        "indic_four_below": [
-	            "\u077C"
-	        ],
-	        "isolated": "\uFEA1",
-	        "final": "\uFEA2",
-	        "initial": "\uFEA3",
-	        "medial": "\uFEA4"
-	    },
-	    "khah": {
-	        "normal": [
-	            "\u062E"
-	        ],
-	        "isolated": "\uFEA5",
-	        "final": "\uFEA6",
-	        "initial": "\uFEA7",
-	        "medial": "\uFEA8"
-	    },
-	    "dal": {
-	        "normal": [
-	            "\u062F"
-	        ],
-	        "ring": [
-	            "\u0689"
-	        ],
-	        "dot_below": [
-	            "\u068A"
-	        ],
-	        "dot_below_small_tah": [
-	            "\u068B"
-	        ],
-	        "three_dots_above_downwards": [
-	            "\u068F"
-	        ],
-	        "four_dots_above": [
-	            "\u0690"
-	        ],
-	        "inverted_v": [
-	            "\u06EE"
-	        ],
-	        "two_dots_vertically_below_small_tah": [
-	            "\u0759"
-	        ],
-	        "inverted_small_v_below": [
-	            "\u075A"
-	        ],
-	        "three_dots_below": [
-	            "\u08AE"
-	        ],
-	        "isolated": "\uFEA9",
-	        "final": "\uFEAA"
-	    },
-	    "thal": {
-	        "normal": [
-	            "\u0630"
-	        ],
-	        "isolated": "\uFEAB",
-	        "final": "\uFEAC"
-	    },
-	    "reh": {
-	        "normal": [
-	            "\u0631"
-	        ],
-	        "small_v": [
-	            "\u0692"
-	        ],
-	        "ring": [
-	            "\u0693"
-	        ],
-	        "dot_below": [
-	            "\u0694"
-	        ],
-	        "small_v_below": [
-	            "\u0695"
-	        ],
-	        "dot_below_dot_above": [
-	            "\u0696"
-	        ],
-	        "two_dots_above": [
-	            "\u0697"
-	        ],
-	        "four_dots_above": [
-	            "\u0699"
-	        ],
-	        "inverted_v": [
-	            "\u06EF"
-	        ],
-	        "stroke": [
-	            "\u075B"
-	        ],
-	        "two_dots_vertically_above": [
-	            "\u076B"
-	        ],
-	        "hamza_above": [
-	            "\u076C"
-	        ],
-	        "small_tah_two_dots": [
-	            "\u0771"
-	        ],
-	        "loop": [
-	            "\u08AA"
-	        ],
-	        "small_noon_above": [
-	            "\u08B9"
-	        ],
-	        "isolated": "\uFEAD",
-	        "final": "\uFEAE"
-	    },
-	    "zain": {
-	        "normal": [
-	            "\u0632"
-	        ],
-	        "inverted_v_above": [
-	            "\u08B2"
-	        ],
-	        "isolated": "\uFEAF",
-	        "final": "\uFEB0"
-	    },
-	    "seen": {
-	        "normal": [
-	            "\u0633"
-	        ],
-	        "dot_below_dot_above": [
-	            "\u069A"
-	        ],
-	        "three_dots_below": [
-	            "\u069B"
-	        ],
-	        "three_dots_below_three_dots_above": [
-	            "\u069C"
-	        ],
-	        "four_dots_above": [
-	            "\u075C"
-	        ],
-	        "two_dots_vertically_above": [
-	            "\u076D"
-	        ],
-	        "small_tah_two_dots": [
-	            "\u0770"
-	        ],
-	        "indic_four_above": [
-	            "\u077D"
-	        ],
-	        "inverted_v": [
-	            "\u077E"
-	        ],
-	        "isolated": "\uFEB1",
-	        "final": "\uFEB2",
-	        "initial": "\uFEB3",
-	        "medial": "\uFEB4"
-	    },
-	    "sheen": {
-	        "normal": [
-	            "\u0634"
-	        ],
-	        "dot_below": [
-	            "\u06FA"
-	        ],
-	        "isolated": "\uFEB5",
-	        "final": "\uFEB6",
-	        "initial": "\uFEB7",
-	        "medial": "\uFEB8"
-	    },
-	    "sad": {
-	        "normal": [
-	            "\u0635"
-	        ],
-	        "two_dots_below": [
-	            "\u069D"
-	        ],
-	        "three_dots_above": [
-	            "\u069E"
-	        ],
-	        "three_dots_below": [
-	            "\u08AF"
-	        ],
-	        "isolated": "\uFEB9",
-	        "final": "\uFEBA",
-	        "initial": "\uFEBB",
-	        "medial": "\uFEBC"
-	    },
-	    "dad": {
-	        "normal": [
-	            "\u0636"
-	        ],
-	        "dot_below": [
-	            "\u06FB"
-	        ],
-	        "isolated": "\uFEBD",
-	        "final": "\uFEBE",
-	        "initial": "\uFEBF",
-	        "medial": "\uFEC0"
-	    },
-	    "tah": {
-	        "normal": [
-	            "\u0637"
-	        ],
-	        "three_dots_above": [
-	            "\u069F"
-	        ],
-	        "two_dots_above": [
-	            "\u08A3"
-	        ],
-	        "isolated": "\uFEC1",
-	        "final": "\uFEC2",
-	        "initial": "\uFEC3",
-	        "medial": "\uFEC4"
-	    },
-	    "zah": {
-	        "normal": [
-	            "\u0638"
-	        ],
-	        "isolated": "\uFEC5",
-	        "final": "\uFEC6",
-	        "initial": "\uFEC7",
-	        "medial": "\uFEC8"
-	    },
-	    "ain": {
-	        "normal": [
-	            "\u0639"
-	        ],
-	        "three_dots_above": [
-	            "\u06A0"
-	        ],
-	        "two_dots_above": [
-	            "\u075D"
-	        ],
-	        "three_dots_pointing_downwards_above": [
-	            "\u075E"
-	        ],
-	        "two_dots_vertically_above": [
-	            "\u075F"
-	        ],
-	        "three_dots_below": [
-	            "\u08B3"
-	        ],
-	        "isolated": "\uFEC9",
-	        "final": "\uFECA",
-	        "initial": "\uFECB",
-	        "medial": "\uFECC"
-	    },
-	    "ghain": {
-	        "normal": [
-	            "\u063A"
-	        ],
-	        "dot_below": [
-	            "\u06FC"
-	        ],
-	        "isolated": "\uFECD",
-	        "final": "\uFECE",
-	        "initial": "\uFECF",
-	        "medial": "\uFED0"
-	    },
-	    "feh": {
-	        "normal": [
-	            "\u0641"
-	        ],
-	        "dotless": [
-	            "\u06A1"
-	        ],
-	        "dot_moved_below": [
-	            "\u06A2"
-	        ],
-	        "dot_below": [
-	            "\u06A3"
-	        ],
-	        "three_dots_below": [
-	            "\u06A5"
-	        ],
-	        "two_dots_below": [
-	            "\u0760"
-	        ],
-	        "three_dots_pointing_upwards_below": [
-	            "\u0761"
-	        ],
-	        "dot_below_three_dots_above": [
-	            "\u08A4"
-	        ],
-	        "isolated": "\uFED1",
-	        "final": "\uFED2",
-	        "initial": "\uFED3",
-	        "medial": "\uFED4"
-	    },
-	    "qaf": {
-	        "normal": [
-	            "\u0642"
-	        ],
-	        "dotless": [
-	            "\u066F"
-	        ],
-	        "dot_above": [
-	            "\u06A7"
-	        ],
-	        "three_dots_above": [
-	            "\u06A8"
-	        ],
-	        "dot_below": [
-	            "\u08A5"
-	        ],
-	        "isolated": "\uFED5",
-	        "final": "\uFED6",
-	        "initial": "\uFED7",
-	        "medial": "\uFED8"
-	    },
-	    "kaf": {
-	        "normal": [
-	            "\u0643"
-	        ],
-	        "swash": [
-	            "\u06AA"
-	        ],
-	        "ring": [
-	            "\u06AB"
-	        ],
-	        "dot_above": [
-	            "\u06AC"
-	        ],
-	        "three_dots_below": [
-	            "\u06AE"
-	        ],
-	        "two_dots_above": [
-	            "\u077F"
-	        ],
-	        "dot_below": [
-	            "\u08B4"
-	        ],
-	        "isolated": "\uFED9",
-	        "final": "\uFEDA",
-	        "initial": "\uFEDB",
-	        "medial": "\uFEDC"
-	    },
-	    "lam": {
-	        "normal": [
-	            "\u0644"
-	        ],
-	        "small_v": [
-	            "\u06B5"
-	        ],
-	        "dot_above": [
-	            "\u06B6"
-	        ],
-	        "three_dots_above": [
-	            "\u06B7"
-	        ],
-	        "three_dots_below": [
-	            "\u06B8"
-	        ],
-	        "bar": [
-	            "\u076A"
-	        ],
-	        "double_bar": [
-	            "\u08A6"
-	        ],
-	        "isolated": "\uFEDD",
-	        "final": "\uFEDE",
-	        "initial": "\uFEDF",
-	        "medial": "\uFEE0"
-	    },
-	    "meem": {
-	        "normal": [
-	            "\u0645"
-	        ],
-	        "dot_above": [
-	            "\u0765"
-	        ],
-	        "dot_below": [
-	            "\u0766"
-	        ],
-	        "three_dots_above": [
-	            "\u08A7"
-	        ],
-	        "isolated": "\uFEE1",
-	        "final": "\uFEE2",
-	        "initial": "\uFEE3",
-	        "medial": "\uFEE4"
-	    },
-	    "noon": {
-	        "normal": [
-	            "\u0646"
-	        ],
-	        "dot_below": [
-	            "\u06B9"
-	        ],
-	        "ring": [
-	            "\u06BC"
-	        ],
-	        "three_dots_above": [
-	            "\u06BD"
-	        ],
-	        "two_dots_below": [
-	            "\u0767"
-	        ],
-	        "small_tah": [
-	            "\u0768"
-	        ],
-	        "small_v": [
-	            "\u0769"
-	        ],
-	        "isolated": "\uFEE5",
-	        "final": "\uFEE6",
-	        "initial": "\uFEE7",
-	        "medial": "\uFEE8"
-	    },
-	    "heh": {
-	        "normal": [
-	            "\u0647"
-	        ],
-	        "isolated": "\uFEE9",
-	        "final": "\uFEEA",
-	        "initial": "\uFEEB",
-	        "medial": "\uFEEC"
-	    },
-	    "waw": {
-	        "normal": [
-	            "\u0648"
-	        ],
-	        "hamza_above": {
-	            "normal": [
-	                "\u0624",
-	                "\u0648\u0654"
-	            ],
-	            "isolated": "\uFE85",
-	            "final": "\uFE86"
-	        },
-	        "high_hamza": [
-	            "\u0676",
-	            "\u0648\u0674"
-	        ],
-	        "ring": [
-	            "\u06C4"
-	        ],
-	        "two_dots_above": [
-	            "\u06CA"
-	        ],
-	        "dot_above": [
-	            "\u06CF"
-	        ],
-	        "indic_two_above": [
-	            "\u0778"
-	        ],
-	        "indic_three_above": [
-	            "\u0779"
-	        ],
-	        "dot_within": [
-	            "\u08AB"
-	        ],
-	        "isolated": "\uFEED",
-	        "final": "\uFEEE"
-	    },
-	    "alef_maksura": {
-	        "normal": [
-	            "\u0649"
-	        ],
-	        "hamza_above": [
-	            "\u0626",
-	            "\u064A\u0654"
-	        ],
-	        "initial": "\uFBE8",
-	        "medial": "\uFBE9",
-	        "isolated": "\uFEEF",
-	        "final": "\uFEF0"
-	    },
-	    "yeh": {
-	        "normal": [
-	            "\u064A"
-	        ],
-	        "hamza_above": {
-	            "normal": [
-	                "\u0626",
-	                "\u0649\u0654"
-	            ],
-	            "isolated": "\uFE89",
-	            "final": "\uFE8A",
-	            "initial": "\uFE8B",
-	            "medial": "\uFE8C"
-	        },
-	        "two_dots_below_hamza_above": [
-	            "\u08A8"
-	        ],
-	        "high_hamza": [
-	            "\u0678",
-	            "\u064A\u0674"
-	        ],
-	        "tail": [
-	            "\u06CD"
-	        ],
-	        "small_v": [
-	            "\u06CE"
-	        ],
-	        "three_dots_below": [
-	            "\u06D1"
-	        ],
-	        "two_dots_below_dot_above": [
-	            "\u08A9"
-	        ],
-	        "two_dots_below_small_noon_above": [
-	            "\u08BA"
-	        ],
-	        "isolated": "\uFEF1",
-	        "final": "\uFEF2",
-	        "initial": "\uFEF3",
-	        "medial": "\uFEF4"
-	    },
-	    "tteh": {
-	        "normal": [
-	            "\u0679"
-	        ],
-	        "isolated": "\uFB66",
-	        "final": "\uFB67",
-	        "initial": "\uFB68",
-	        "medial": "\uFB69"
-	    },
-	    "tteheh": {
-	        "normal": [
-	            "\u067A"
-	        ],
-	        "isolated": "\uFB5E",
-	        "final": "\uFB5F",
-	        "initial": "\uFB60",
-	        "medial": "\uFB61"
-	    },
-	    "beeh": {
-	        "normal": [
-	            "\u067B"
-	        ],
-	        "isolated": "\uFB52",
-	        "final": "\uFB53",
-	        "initial": "\uFB54",
-	        "medial": "\uFB55"
-	    },
-	    "peh": {
-	        "normal": [
-	            "\u067E"
-	        ],
-	        "small_meem_above": [
-	            "\u08B7"
-	        ],
-	        "isolated": "\uFB56",
-	        "final": "\uFB57",
-	        "initial": "\uFB58",
-	        "medial": "\uFB59"
-	    },
-	    "teheh": {
-	        "normal": [
-	            "\u067F"
-	        ],
-	        "isolated": "\uFB62",
-	        "final": "\uFB63",
-	        "initial": "\uFB64",
-	        "medial": "\uFB65"
-	    },
-	    "beheh": {
-	        "normal": [
-	            "\u0680"
-	        ],
-	        "isolated": "\uFB5A",
-	        "final": "\uFB5B",
-	        "initial": "\uFB5C",
-	        "medial": "\uFB5D"
-	    },
-	    "nyeh": {
-	        "normal": [
-	            "\u0683"
-	        ],
-	        "isolated": "\uFB76",
-	        "final": "\uFB77",
-	        "initial": "\uFB78",
-	        "medial": "\uFB79"
-	    },
-	    "dyeh": {
-	        "normal": [
-	            "\u0684"
-	        ],
-	        "isolated": "\uFB72",
-	        "final": "\uFB73",
-	        "initial": "\uFB74",
-	        "medial": "\uFB75"
-	    },
-	    "tcheh": {
-	        "normal": [
-	            "\u0686"
-	        ],
-	        "dot_above": [
-	            "\u06BF"
-	        ],
-	        "isolated": "\uFB7A",
-	        "final": "\uFB7B",
-	        "initial": "\uFB7C",
-	        "medial": "\uFB7D"
-	    },
-	    "tcheheh": {
-	        "normal": [
-	            "\u0687"
-	        ],
-	        "isolated": "\uFB7E",
-	        "final": "\uFB7F",
-	        "initial": "\uFB80",
-	        "medial": "\uFB81"
-	    },
-	    "ddal": {
-	        "normal": [
-	            "\u0688"
-	        ],
-	        "isolated": "\uFB88",
-	        "final": "\uFB89"
-	    },
-	    "dahal": {
-	        "normal": [
-	            "\u068C"
-	        ],
-	        "isolated": "\uFB84",
-	        "final": "\uFB85"
-	    },
-	    "ddahal": {
-	        "normal": [
-	            "\u068D"
-	        ],
-	        "isolated": "\uFB82",
-	        "final": "\uFB83"
-	    },
-	    "dul": {
-	        "normal": [
-	            "\u068F",
-	            "\u068E"
-	        ],
-	        "isolated": "\uFB86",
-	        "final": "\uFB87"
-	    },
-	    "rreh": {
-	        "normal": [
-	            "\u0691"
-	        ],
-	        "isolated": "\uFB8C",
-	        "final": "\uFB8D"
-	    },
-	    "jeh": {
-	        "normal": [
-	            "\u0698"
-	        ],
-	        "isolated": "\uFB8A",
-	        "final": "\uFB8B"
-	    },
-	    "veh": {
-	        "normal": [
-	            "\u06A4"
-	        ],
-	        "isolated": "\uFB6A",
-	        "final": "\uFB6B",
-	        "initial": "\uFB6C",
-	        "medial": "\uFB6D"
-	    },
-	    "peheh": {
-	        "normal": [
-	            "\u06A6"
-	        ],
-	        "isolated": "\uFB6E",
-	        "final": "\uFB6F",
-	        "initial": "\uFB70",
-	        "medial": "\uFB71"
-	    },
-	    "keheh": {
-	        "normal": [
-	            "\u06A9"
-	        ],
-	        "dot_above": [
-	            "\u0762"
-	        ],
-	        "three_dots_above": [
-	            "\u0763"
-	        ],
-	        "three_dots_pointing_upwards_below": [
-	            "\u0764"
-	        ],
-	        "isolated": "\uFB8E",
-	        "final": "\uFB8F",
-	        "initial": "\uFB90",
-	        "medial": "\uFB91"
-	    },
-	    "ng": {
-	        "normal": [
-	            "\u06AD"
-	        ],
-	        "isolated": "\uFBD3",
-	        "final": "\uFBD4",
-	        "initial": "\uFBD5",
-	        "medial": "\uFBD6"
-	    },
-	    "gaf": {
-	        "normal": [
-	            "\u06AF"
-	        ],
-	        "ring": [
-	            "\u06B0"
-	        ],
-	        "two_dots_below": [
-	            "\u06B2"
-	        ],
-	        "three_dots_above": [
-	            "\u06B4"
-	        ],
-	        "inverted_stroke": [
-	            "\u08B0"
-	        ],
-	        "isolated": "\uFB92",
-	        "final": "\uFB93",
-	        "initial": "\uFB94",
-	        "medial": "\uFB95"
-	    },
-	    "ngoeh": {
-	        "normal": [
-	            "\u06B1"
-	        ],
-	        "isolated": "\uFB9A",
-	        "final": "\uFB9B",
-	        "initial": "\uFB9C",
-	        "medial": "\uFB9D"
-	    },
-	    "gueh": {
-	        "normal": [
-	            "\u06B3"
-	        ],
-	        "isolated": "\uFB96",
-	        "final": "\uFB97",
-	        "initial": "\uFB98",
-	        "medial": "\uFB99"
-	    },
-	    "noon ghunna": {
-	        "normal": [
-	            "\u06BA"
-	        ],
-	        "isolated": "\uFB9E",
-	        "final": "\uFB9F"
-	    },
-	    "rnoon": {
-	        "normal": [
-	            "\u06BB"
-	        ],
-	        "isolated": "\uFBA0",
-	        "final": "\uFBA1",
-	        "initial": "\uFBA2",
-	        "medial": "\uFBA3"
-	    },
-	    "heh doachashmee": {
-	        "normal": [
-	            "\u06BE"
-	        ],
-	        "isolated": "\uFBAA",
-	        "final": "\uFBAB",
-	        "initial": "\uFBAC",
-	        "medial": "\uFBAD"
-	    },
-	    "heh goal": {
-	        "normal": [
-	            "\u06C1"
-	        ],
-	        "hamza_above": [
-	            "\u06C1\u0654",
-	            "\u06C2"
-	        ],
-	        "isolated": "\uFBA6",
-	        "final": "\uFBA7",
-	        "initial": "\uFBA8",
-	        "medial": "\uFBA9"
-	    },
-	    "teh marbuta goal": {
-	        "normal": [
-	            "\u06C3"
-	        ]
-	    },
-	    "kirghiz oe": {
-	        "normal": [
-	            "\u06C5"
-	        ],
-	        "isolated": "\uFBE0",
-	        "final": "\uFBE1"
-	    },
-	    "oe": {
-	        "normal": [
-	            "\u06C6"
-	        ],
-	        "isolated": "\uFBD9",
-	        "final": "\uFBDA"
-	    },
-	    "u": {
-	        "normal": [
-	            "\u06C7"
-	        ],
-	        "hamza_above": {
-	            "normal": [
-	                "\u0677",
-	                "\u06C7\u0674"
-	            ],
-	            "isolated": "\uFBDD"
-	        },
-	        "isolated": "\uFBD7",
-	        "final": "\uFBD8"
-	    },
-	    "yu": {
-	        "normal": [
-	            "\u06C8"
-	        ],
-	        "isolated": "\uFBDB",
-	        "final": "\uFBDC"
-	    },
-	    "kirghiz yu": {
-	        "normal": [
-	            "\u06C9"
-	        ],
-	        "isolated": "\uFBE2",
-	        "final": "\uFBE3"
-	    },
-	    "ve": {
-	        "normal": [
-	            "\u06CB"
-	        ],
-	        "isolated": "\uFBDE",
-	        "final": "\uFBDF"
-	    },
-	    "farsi yeh": {
-	        "normal": [
-	            "\u06CC"
-	        ],
-	        "indic_two_above": [
-	            "\u0775"
-	        ],
-	        "indic_three_above": [
-	            "\u0776"
-	        ],
-	        "indic_four_above": [
-	            "\u0777"
-	        ],
-	        "isolated": "\uFBFC",
-	        "final": "\uFBFD",
-	        "initial": "\uFBFE",
-	        "medial": "\uFBFF"
-	    },
-	    "e": {
-	        "normal": [
-	            "\u06D0"
-	        ],
-	        "isolated": "\uFBE4",
-	        "final": "\uFBE5",
-	        "initial": "\uFBE6",
-	        "medial": "\uFBE7"
-	    },
-	    "yeh barree": {
-	        "normal": [
-	            "\u06D2"
-	        ],
-	        "hamza_above": {
-	            "normal": [
-	                "\u06D2\u0654",
-	                "\u06D3"
-	            ],
-	            "isolated": "\uFBB0",
-	            "final": "\uFBB1"
-	        },
-	        "indic_two_above": [
-	            "\u077A"
-	        ],
-	        "indic_three_above": [
-	            "\u077B"
-	        ],
-	        "isolated": "\uFBAE",
-	        "final": "\uFBAF"
-	    },
-	    "ae": {
-	        "normal": [
-	            "\u06D5"
-	        ],
-	        "isolated": "\u06D5",
-	        "final": "\uFEEA",
-	        "yeh_above": {
-	            "normal": [
-	                "\u06C0",
-	                "\u06D5\u0654"
-	            ],
-	            "isolated": "\uFBA4",
-	            "final": "\uFBA5"
-	        }
-	    },
-	    "rohingya yeh": {
-	        "normal": [
-	            "\u08AC"
-	        ]
-	    },
-	    "low alef": {
-	        "normal": [
-	            "\u08AD"
-	        ]
-	    },
-	    "straight waw": {
-	        "normal": [
-	            "\u08B1"
-	        ]
-	    },
-	    "african feh": {
-	        "normal": [
-	            "\u08BB"
-	        ]
-	    },
-	    "african qaf": {
-	        "normal": [
-	            "\u08BC"
-	        ]
-	    },
-	    "african noon": {
-	        "normal": [
-	            "\u08BD"
-	        ]
-	    }
-	};
-	exports.default = arabicReference;
-	});
-
-	var unicodeLigatures = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-	var ligatureReference = {
-	    "\u0626\u0627": {
-	        "isolated": "\uFBEA",
-	        "final": "\uFBEB"
-	    },
-	    "\u0626\u06D5": {
-	        "isolated": "\uFBEC",
-	        "final": "\uFBED"
-	    },
-	    "\u0626\u0648": {
-	        "isolated": "\uFBEE",
-	        "final": "\uFBEF"
-	    },
-	    "\u0626\u06C7": {
-	        "isolated": "\uFBF0",
-	        "final": "\uFBF1"
-	    },
-	    "\u0626\u06C6": {
-	        "isolated": "\uFBF2",
-	        "final": "\uFBF3"
-	    },
-	    "\u0626\u06C8": {
-	        "isolated": "\uFBF4",
-	        "final": "\uFBF5"
-	    },
-	    "\u0626\u06D0": {
-	        "isolated": "\uFBF6",
-	        "final": "\uFBF7",
-	        "initial": "\uFBF8"
-	    },
-	    "\u0626\u0649": {
-	        "uighur_kirghiz": {
-	            "isolated": "\uFBF9",
-	            "final": "\uFBFA",
-	            "initial": "\uFBFB"
-	        },
-	        "isolated": "\uFC03",
-	        "final": "\uFC68"
-	    },
-	    "\u0626\u062C": {
-	        "isolated": "\uFC00",
-	        "initial": "\uFC97"
-	    },
-	    "\u0626\u062D": {
-	        "isolated": "\uFC01",
-	        "initial": "\uFC98"
-	    },
-	    "\u0626\u0645": {
-	        "isolated": "\uFC02",
-	        "final": "\uFC66",
-	        "initial": "\uFC9A",
-	        "medial": "\uFCDF"
-	    },
-	    "\u0626\u064A": {
-	        "isolated": "\uFC04",
-	        "final": "\uFC69"
-	    },
-	    "\u0628\u062C": {
-	        "isolated": "\uFC05",
-	        "initial": "\uFC9C"
-	    },
-	    "\u0628\u062D": {
-	        "isolated": "\uFC06",
-	        "initial": "\uFC9D"
-	    },
-	    "\u0628\u062E": {
-	        "isolated": "\uFC07",
-	        "initial": "\uFC9E"
-	    },
-	    "\u0628\u0645": {
-	        "isolated": "\uFC08",
-	        "final": "\uFC6C",
-	        "initial": "\uFC9F",
-	        "medial": "\uFCE1"
-	    },
-	    "\u0628\u0649": {
-	        "isolated": "\uFC09",
-	        "final": "\uFC6E"
-	    },
-	    "\u0628\u064A": {
-	        "isolated": "\uFC0A",
-	        "final": "\uFC6F"
-	    },
-	    "\u062A\u062C": {
-	        "isolated": "\uFC0B",
-	        "initial": "\uFCA1"
-	    },
-	    "\u062A\u062D": {
-	        "isolated": "\uFC0C",
-	        "initial": "\uFCA2"
-	    },
-	    "\u062A\u062E": {
-	        "isolated": "\uFC0D",
-	        "initial": "\uFCA3"
-	    },
-	    "\u062A\u0645": {
-	        "isolated": "\uFC0E",
-	        "final": "\uFC72",
-	        "initial": "\uFCA4",
-	        "medial": "\uFCE3"
-	    },
-	    "\u062A\u0649": {
-	        "isolated": "\uFC0F",
-	        "final": "\uFC74"
-	    },
-	    "\u062A\u064A": {
-	        "isolated": "\uFC10",
-	        "final": "\uFC75"
-	    },
-	    "\u062B\u062C": {
-	        "isolated": "\uFC11"
-	    },
-	    "\u062B\u0645": {
-	        "isolated": "\uFC12",
-	        "final": "\uFC78",
-	        "initial": "\uFCA6",
-	        "medial": "\uFCE5"
-	    },
-	    "\u062B\u0649": {
-	        "isolated": "\uFC13",
-	        "final": "\uFC7A"
-	    },
-	    "\u062B\u0648": {
-	        "isolated": "\uFC14"
-	    },
-	    "\u062C\u062D": {
-	        "isolated": "\uFC15",
-	        "initial": "\uFCA7"
-	    },
-	    "\u062C\u0645": {
-	        "isolated": "\uFC16",
-	        "initial": "\uFCA8"
-	    },
-	    "\u062D\u062C": {
-	        "isolated": "\uFC17",
-	        "initial": "\uFCA9"
-	    },
-	    "\u062D\u0645": {
-	        "isolated": "\uFC18",
-	        "initial": "\uFCAA"
-	    },
-	    "\u062E\u062C": {
-	        "isolated": "\uFC19",
-	        "initial": "\uFCAB"
-	    },
-	    "\u062E\u062D": {
-	        "isolated": "\uFC1A"
-	    },
-	    "\u062E\u0645": {
-	        "isolated": "\uFC1B",
-	        "initial": "\uFCAC"
-	    },
-	    "\u0633\u062C": {
-	        "isolated": "\uFC1C",
-	        "initial": "\uFCAD",
-	        "medial": "\uFD34"
-	    },
-	    "\u0633\u062D": {
-	        "isolated": "\uFC1D",
-	        "initial": "\uFCAE",
-	        "medial": "\uFD35"
-	    },
-	    "\u0633\u062E": {
-	        "isolated": "\uFC1E",
-	        "initial": "\uFCAF",
-	        "medial": "\uFD36"
-	    },
-	    "\u0633\u0645": {
-	        "isolated": "\uFC1F",
-	        "initial": "\uFCB0",
-	        "medial": "\uFCE7"
-	    },
-	    "\u0635\u062D": {
-	        "isolated": "\uFC20",
-	        "initial": "\uFCB1"
-	    },
-	    "\u0635\u0645": {
-	        "isolated": "\uFC21",
-	        "initial": "\uFCB3"
-	    },
-	    "\u0636\u062C": {
-	        "isolated": "\uFC22",
-	        "initial": "\uFCB4"
-	    },
-	    "\u0636\u062D": {
-	        "isolated": "\uFC23",
-	        "initial": "\uFCB5"
-	    },
-	    "\u0636\u062E": {
-	        "isolated": "\uFC24",
-	        "initial": "\uFCB6"
-	    },
-	    "\u0636\u0645": {
-	        "isolated": "\uFC25",
-	        "initial": "\uFCB7"
-	    },
-	    "\u0637\u062D": {
-	        "isolated": "\uFC26",
-	        "initial": "\uFCB8"
-	    },
-	    "\u0637\u0645": {
-	        "isolated": "\uFC27",
-	        "initial": "\uFD33",
-	        "medial": "\uFD3A"
-	    },
-	    "\u0638\u0645": {
-	        "isolated": "\uFC28",
-	        "initial": "\uFCB9",
-	        "medial": "\uFD3B"
-	    },
-	    "\u0639\u062C": {
-	        "isolated": "\uFC29",
-	        "initial": "\uFCBA"
-	    },
-	    "\u0639\u0645": {
-	        "isolated": "\uFC2A",
-	        "initial": "\uFCBB"
-	    },
-	    "\u063A\u062C": {
-	        "isolated": "\uFC2B",
-	        "initial": "\uFCBC"
-	    },
-	    "\u063A\u0645": {
-	        "isolated": "\uFC2C",
-	        "initial": "\uFCBD"
-	    },
-	    "\u0641\u062C": {
-	        "isolated": "\uFC2D",
-	        "initial": "\uFCBE"
-	    },
-	    "\u0641\u062D": {
-	        "isolated": "\uFC2E",
-	        "initial": "\uFCBF"
-	    },
-	    "\u0641\u062E": {
-	        "isolated": "\uFC2F",
-	        "initial": "\uFCC0"
-	    },
-	    "\u0641\u0645": {
-	        "isolated": "\uFC30",
-	        "initial": "\uFCC1"
-	    },
-	    "\u0641\u0649": {
-	        "isolated": "\uFC31",
-	        "final": "\uFC7C"
-	    },
-	    "\u0641\u064A": {
-	        "isolated": "\uFC32",
-	        "final": "\uFC7D"
-	    },
-	    "\u0642\u062D": {
-	        "isolated": "\uFC33",
-	        "initial": "\uFCC2"
-	    },
-	    "\u0642\u0645": {
-	        "isolated": "\uFC34",
-	        "initial": "\uFCC3"
-	    },
-	    "\u0642\u0649": {
-	        "isolated": "\uFC35",
-	        "final": "\uFC7E"
-	    },
-	    "\u0642\u064A": {
-	        "isolated": "\uFC36",
-	        "final": "\uFC7F"
-	    },
-	    "\u0643\u0627": {
-	        "isolated": "\uFC37",
-	        "final": "\uFC80"
-	    },
-	    "\u0643\u062C": {
-	        "isolated": "\uFC38",
-	        "initial": "\uFCC4"
-	    },
-	    "\u0643\u062D": {
-	        "isolated": "\uFC39",
-	        "initial": "\uFCC5"
-	    },
-	    "\u0643\u062E": {
-	        "isolated": "\uFC3A",
-	        "initial": "\uFCC6"
-	    },
-	    "\u0643\u0644": {
-	        "isolated": "\uFC3B",
-	        "final": "\uFC81",
-	        "initial": "\uFCC7",
-	        "medial": "\uFCEB"
-	    },
-	    "\u0643\u0645": {
-	        "isolated": "\uFC3C",
-	        "final": "\uFC82",
-	        "initial": "\uFCC8",
-	        "medial": "\uFCEC"
-	    },
-	    "\u0643\u0649": {
-	        "isolated": "\uFC3D",
-	        "final": "\uFC83"
-	    },
-	    "\u0643\u064A": {
-	        "isolated": "\uFC3E",
-	        "final": "\uFC84"
-	    },
-	    "\u0644\u062C": {
-	        "isolated": "\uFC3F",
-	        "initial": "\uFCC9"
-	    },
-	    "\u0644\u062D": {
-	        "isolated": "\uFC40",
-	        "initial": "\uFCCA"
-	    },
-	    "\u0644\u062E": {
-	        "isolated": "\uFC41",
-	        "initial": "\uFCCB"
-	    },
-	    "\u0644\u0645": {
-	        "isolated": "\uFC42",
-	        "final": "\uFC85",
-	        "initial": "\uFCCC",
-	        "medial": "\uFCED"
-	    },
-	    "\u0644\u0649": {
-	        "isolated": "\uFC43",
-	        "final": "\uFC86"
-	    },
-	    "\u0644\u064A": {
-	        "isolated": "\uFC44",
-	        "final": "\uFC87"
-	    },
-	    "\u0645\u062C": {
-	        "isolated": "\uFC45",
-	        "initial": "\uFCCE"
-	    },
-	    "\u0645\u062D": {
-	        "isolated": "\uFC46",
-	        "initial": "\uFCCF"
-	    },
-	    "\u0645\u062E": {
-	        "isolated": "\uFC47",
-	        "initial": "\uFCD0"
-	    },
-	    "\u0645\u0645": {
-	        "isolated": "\uFC48",
-	        "final": "\uFC89",
-	        "initial": "\uFCD1"
-	    },
-	    "\u0645\u0649": {
-	        "isolated": "\uFC49"
-	    },
-	    "\u0645\u064A": {
-	        "isolated": "\uFC4A"
-	    },
-	    "\u0646\u062C": {
-	        "isolated": "\uFC4B",
-	        "initial": "\uFCD2"
-	    },
-	    "\u0646\u062D": {
-	        "isolated": "\uFC4C",
-	        "initial": "\uFCD3"
-	    },
-	    "\u0646\u062E": {
-	        "isolated": "\uFC4D",
-	        "initial": "\uFCD4"
-	    },
-	    "\u0646\u0645": {
-	        "isolated": "\uFC4E",
-	        "final": "\uFC8C",
-	        "initial": "\uFCD5",
-	        "medial": "\uFCEE"
-	    },
-	    "\u0646\u0649": {
-	        "isolated": "\uFC4F",
-	        "final": "\uFC8E"
-	    },
-	    "\u0646\u064A": {
-	        "isolated": "\uFC50",
-	        "final": "\uFC8F"
-	    },
-	    "\u0647\u062C": {
-	        "isolated": "\uFC51",
-	        "initial": "\uFCD7"
-	    },
-	    "\u0647\u0645": {
-	        "isolated": "\uFC52",
-	        "initial": "\uFCD8"
-	    },
-	    "\u0647\u0649": {
-	        "isolated": "\uFC53"
-	    },
-	    "\u0647\u064A": {
-	        "isolated": "\uFC54"
-	    },
-	    "\u064A\u062C": {
-	        "isolated": "\uFC55",
-	        "initial": "\uFCDA"
-	    },
-	    "\u064A\u062D": {
-	        "isolated": "\uFC56",
-	        "initial": "\uFCDB"
-	    },
-	    "\u064A\u062E": {
-	        "isolated": "\uFC57",
-	        "initial": "\uFCDC"
-	    },
-	    "\u064A\u0645": {
-	        "isolated": "\uFC58",
-	        "final": "\uFC93",
-	        "initial": "\uFCDD",
-	        "medial": "\uFCF0"
-	    },
-	    "\u064A\u0649": {
-	        "isolated": "\uFC59",
-	        "final": "\uFC95"
-	    },
-	    "\u064A\u064A": {
-	        "isolated": "\uFC5A",
-	        "final": "\uFC96"
-	    },
-	    "\u0630\u0670": {
-	        "isolated": "\uFC5B"
-	    },
-	    "\u0631\u0670": {
-	        "isolated": "\uFC5C"
-	    },
-	    "\u0649\u0670": {
-	        "isolated": "\uFC5D",
-	        "final": "\uFC90"
-	    },
-	    "\u064C\u0651": {
-	        "isolated": "\uFC5E"
-	    },
-	    "\u064D\u0651": {
-	        "isolated": "\uFC5F"
-	    },
-	    "\u064E\u0651": {
-	        "isolated": "\uFC60"
-	    },
-	    "\u064F\u0651": {
-	        "isolated": "\uFC61"
-	    },
-	    "\u0650\u0651": {
-	        "isolated": "\uFC62"
-	    },
-	    "\u0651\u0670": {
-	        "isolated": "\uFC63"
-	    },
-	    "\u0626\u0631": {
-	        "final": "\uFC64"
-	    },
-	    "\u0626\u0632": {
-	        "final": "\uFC65"
-	    },
-	    "\u0626\u0646": {
-	        "final": "\uFC67"
-	    },
-	    "\u0628\u0631": {
-	        "final": "\uFC6A"
-	    },
-	    "\u0628\u0632": {
-	        "final": "\uFC6B"
-	    },
-	    "\u0628\u0646": {
-	        "final": "\uFC6D"
-	    },
-	    "\u062A\u0631": {
-	        "final": "\uFC70"
-	    },
-	    "\u062A\u0632": {
-	        "final": "\uFC71"
-	    },
-	    "\u062A\u0646": {
-	        "final": "\uFC73"
-	    },
-	    "\u062B\u0631": {
-	        "final": "\uFC76"
-	    },
-	    "\u062B\u0632": {
-	        "final": "\uFC77"
-	    },
-	    "\u062B\u0646": {
-	        "final": "\uFC79"
-	    },
-	    "\u062B\u064A": {
-	        "final": "\uFC7B"
-	    },
-	    "\u0645\u0627": {
-	        "final": "\uFC88"
-	    },
-	    "\u0646\u0631": {
-	        "final": "\uFC8A"
-	    },
-	    "\u0646\u0632": {
-	        "final": "\uFC8B"
-	    },
-	    "\u0646\u0646": {
-	        "final": "\uFC8D"
-	    },
-	    "\u064A\u0631": {
-	        "final": "\uFC91"
-	    },
-	    "\u064A\u0632": {
-	        "final": "\uFC92"
-	    },
-	    "\u064A\u0646": {
-	        "final": "\uFC94"
-	    },
-	    "\u0626\u062E": {
-	        "initial": "\uFC99"
-	    },
-	    "\u0626\u0647": {
-	        "initial": "\uFC9B",
-	        "medial": "\uFCE0"
-	    },
-	    "\u0628\u0647": {
-	        "initial": "\uFCA0",
-	        "medial": "\uFCE2"
-	    },
-	    "\u062A\u0647": {
-	        "initial": "\uFCA5",
-	        "medial": "\uFCE4"
-	    },
-	    "\u0635\u062E": {
-	        "initial": "\uFCB2"
-	    },
-	    "\u0644\u0647": {
-	        "initial": "\uFCCD"
-	    },
-	    "\u0646\u0647": {
-	        "initial": "\uFCD6",
-	        "medial": "\uFCEF"
-	    },
-	    "\u0647\u0670": {
-	        "initial": "\uFCD9"
-	    },
-	    "\u064A\u0647": {
-	        "initial": "\uFCDE",
-	        "medial": "\uFCF1"
-	    },
-	    "\u062B\u0647": {
-	        "medial": "\uFCE6"
-	    },
-	    "\u0633\u0647": {
-	        "medial": "\uFCE8",
-	        "initial": "\uFD31"
-	    },
-	    "\u0634\u0645": {
-	        "medial": "\uFCE9",
-	        "isolated": "\uFD0C",
-	        "final": "\uFD28",
-	        "initial": "\uFD30"
-	    },
-	    "\u0634\u0647": {
-	        "medial": "\uFCEA",
-	        "initial": "\uFD32"
-	    },
-	    "\u0640\u064E\u0651": {
-	        "medial": "\uFCF2"
-	    },
-	    "\u0640\u064F\u0651": {
-	        "medial": "\uFCF3"
-	    },
-	    "\u0640\u0650\u0651": {
-	        "medial": "\uFCF4"
-	    },
-	    "\u0637\u0649": {
-	        "isolated": "\uFCF5",
-	        "final": "\uFD11"
-	    },
-	    "\u0637\u064A": {
-	        "isolated": "\uFCF6",
-	        "final": "\uFD12"
-	    },
-	    "\u0639\u0649": {
-	        "isolated": "\uFCF7",
-	        "final": "\uFD13"
-	    },
-	    "\u0639\u064A": {
-	        "isolated": "\uFCF8",
-	        "final": "\uFD14"
-	    },
-	    "\u063A\u0649": {
-	        "isolated": "\uFCF9",
-	        "final": "\uFD15"
-	    },
-	    "\u063A\u064A": {
-	        "isolated": "\uFCFA",
-	        "final": "\uFD16"
-	    },
-	    "\u0633\u0649": {
-	        "isolated": "\uFCFB"
-	    },
-	    "\u0633\u064A": {
-	        "isolated": "\uFCFC",
-	        "final": "\uFD18"
-	    },
-	    "\u0634\u0649": {
-	        "isolated": "\uFCFD",
-	        "final": "\uFD19"
-	    },
-	    "\u0634\u064A": {
-	        "isolated": "\uFCFE",
-	        "final": "\uFD1A"
-	    },
-	    "\u062D\u0649": {
-	        "isolated": "\uFCFF",
-	        "final": "\uFD1B"
-	    },
-	    "\u062D\u064A": {
-	        "isolated": "\uFD00",
-	        "final": "\uFD1C"
-	    },
-	    "\u062C\u0649": {
-	        "isolated": "\uFD01",
-	        "final": "\uFD1D"
-	    },
-	    "\u062C\u064A": {
-	        "isolated": "\uFD02",
-	        "final": "\uFD1E"
-	    },
-	    "\u062E\u0649": {
-	        "isolated": "\uFD03",
-	        "final": "\uFD1F"
-	    },
-	    "\u062E\u064A": {
-	        "isolated": "\uFD04",
-	        "final": "\uFD20"
-	    },
-	    "\u0635\u0649": {
-	        "isolated": "\uFD05",
-	        "final": "\uFD21"
-	    },
-	    "\u0635\u064A": {
-	        "isolated": "\uFD06",
-	        "final": "\uFD22"
-	    },
-	    "\u0636\u0649": {
-	        "isolated": "\uFD07",
-	        "final": "\uFD23"
-	    },
-	    "\u0636\u064A": {
-	        "isolated": "\uFD08",
-	        "final": "\uFD24"
-	    },
-	    "\u0634\u062C": {
-	        "isolated": "\uFD09",
-	        "final": "\uFD25",
-	        "initial": "\uFD2D",
-	        "medial": "\uFD37"
-	    },
-	    "\u0634\u062D": {
-	        "isolated": "\uFD0A",
-	        "final": "\uFD26",
-	        "initial": "\uFD2E",
-	        "medial": "\uFD38"
-	    },
-	    "\u0634\u062E": {
-	        "isolated": "\uFD0B",
-	        "final": "\uFD27",
-	        "initial": "\uFD2F",
-	        "medial": "\uFD39"
-	    },
-	    "\u0634\u0631": {
-	        "isolated": "\uFD0D",
-	        "final": "\uFD29"
-	    },
-	    "\u0633\u0631": {
-	        "isolated": "\uFD0E",
-	        "final": "\uFD2A"
-	    },
-	    "\u0635\u0631": {
-	        "isolated": "\uFD0F",
-	        "final": "\uFD2B"
-	    },
-	    "\u0636\u0631": {
-	        "isolated": "\uFD10",
-	        "final": "\uFD2C"
-	    },
-	    "\u0633\u0639": {
-	        "final": "\uFD17"
-	    },
-	    "\u062A\u062C\u0645": {
-	        "initial": "\uFD50"
-	    },
-	    "\u062A\u062D\u062C": {
-	        "final": "\uFD51",
-	        "initial": "\uFD52"
-	    },
-	    "\u062A\u062D\u0645": {
-	        "initial": "\uFD53"
-	    },
-	    "\u062A\u062E\u0645": {
-	        "initial": "\uFD54"
-	    },
-	    "\u062A\u0645\u062C": {
-	        "initial": "\uFD55"
-	    },
-	    "\u062A\u0645\u062D": {
-	        "initial": "\uFD56"
-	    },
-	    "\u062A\u0645\u062E": {
-	        "initial": "\uFD57"
-	    },
-	    "\u062C\u0645\u062D": {
-	        "final": "\uFD58",
-	        "initial": "\uFD59"
-	    },
-	    "\u062D\u0645\u064A": {
-	        "final": "\uFD5A"
-	    },
-	    "\u062D\u0645\u0649": {
-	        "final": "\uFD5B"
-	    },
-	    "\u0633\u062D\u062C": {
-	        "initial": "\uFD5C"
-	    },
-	    "\u0633\u062C\u062D": {
-	        "initial": "\uFD5D"
-	    },
-	    "\u0633\u062C\u0649": {
-	        "final": "\uFD5E"
-	    },
-	    "\u0633\u0645\u062D": {
-	        "final": "\uFD5F",
-	        "initial": "\uFD60"
-	    },
-	    "\u0633\u0645\u062C": {
-	        "initial": "\uFD61"
-	    },
-	    "\u0633\u0645\u0645": {
-	        "final": "\uFD62",
-	        "initial": "\uFD63"
-	    },
-	    "\u0635\u062D\u062D": {
-	        "final": "\uFD64",
-	        "initial": "\uFD65"
-	    },
-	    "\u0635\u0645\u0645": {
-	        "final": "\uFD66",
-	        "initial": "\uFDC5"
-	    },
-	    "\u0634\u062D\u0645": {
-	        "final": "\uFD67",
-	        "initial": "\uFD68"
-	    },
-	    "\u0634\u062C\u064A": {
-	        "final": "\uFD69"
-	    },
-	    "\u0634\u0645\u062E": {
-	        "final": "\uFD6A",
-	        "initial": "\uFD6B"
-	    },
-	    "\u0634\u0645\u0645": {
-	        "final": "\uFD6C",
-	        "initial": "\uFD6D"
-	    },
-	    "\u0636\u062D\u0649": {
-	        "final": "\uFD6E"
-	    },
-	    "\u0636\u062E\u0645": {
-	        "final": "\uFD6F",
-	        "initial": "\uFD70"
-	    },
-	    "\u0636\u0645\u062D": {
-	        "final": "\uFD71"
-	    },
-	    "\u0637\u0645\u062D": {
-	        "initial": "\uFD72"
-	    },
-	    "\u0637\u0645\u0645": {
-	        "initial": "\uFD73"
-	    },
-	    "\u0637\u0645\u064A": {
-	        "final": "\uFD74"
-	    },
-	    "\u0639\u062C\u0645": {
-	        "final": "\uFD75",
-	        "initial": "\uFDC4"
-	    },
-	    "\u0639\u0645\u0645": {
-	        "final": "\uFD76",
-	        "initial": "\uFD77"
-	    },
-	    "\u0639\u0645\u0649": {
-	        "final": "\uFD78"
-	    },
-	    "\u063A\u0645\u0645": {
-	        "final": "\uFD79"
-	    },
-	    "\u063A\u0645\u064A": {
-	        "final": "\uFD7A"
-	    },
-	    "\u063A\u0645\u0649": {
-	        "final": "\uFD7B"
-	    },
-	    "\u0641\u062E\u0645": {
-	        "final": "\uFD7C",
-	        "initial": "\uFD7D"
-	    },
-	    "\u0642\u0645\u062D": {
-	        "final": "\uFD7E",
-	        "initial": "\uFDB4"
-	    },
-	    "\u0642\u0645\u0645": {
-	        "final": "\uFD7F"
-	    },
-	    "\u0644\u062D\u0645": {
-	        "final": "\uFD80",
-	        "initial": "\uFDB5"
-	    },
-	    "\u0644\u062D\u064A": {
-	        "final": "\uFD81"
-	    },
-	    "\u0644\u062D\u0649": {
-	        "final": "\uFD82"
-	    },
-	    "\u0644\u062C\u062C": {
-	        "initial": "\uFD83",
-	        "final": "\uFD84"
-	    },
-	    "\u0644\u062E\u0645": {
-	        "final": "\uFD85",
-	        "initial": "\uFD86"
-	    },
-	    "\u0644\u0645\u062D": {
-	        "final": "\uFD87",
-	        "initial": "\uFD88"
-	    },
-	    "\u0645\u062D\u062C": {
-	        "initial": "\uFD89"
-	    },
-	    "\u0645\u062D\u0645": {
-	        "initial": "\uFD8A"
-	    },
-	    "\u0645\u062D\u064A": {
-	        "final": "\uFD8B"
-	    },
-	    "\u0645\u062C\u062D": {
-	        "initial": "\uFD8C"
-	    },
-	    "\u0645\u062C\u0645": {
-	        "initial": "\uFD8D"
-	    },
-	    "\u0645\u062E\u062C": {
-	        "initial": "\uFD8E"
-	    },
-	    "\u0645\u062E\u0645": {
-	        "initial": "\uFD8F"
-	    },
-	    "\u0645\u062C\u062E": {
-	        "initial": "\uFD92"
-	    },
-	    "\u0647\u0645\u062C": {
-	        "initial": "\uFD93"
-	    },
-	    "\u0647\u0645\u0645": {
-	        "initial": "\uFD94"
-	    },
-	    "\u0646\u062D\u0645": {
-	        "initial": "\uFD95"
-	    },
-	    "\u0646\u062D\u0649": {
-	        "final": "\uFD96"
-	    },
-	    "\u0646\u062C\u0645": {
-	        "final": "\uFD97",
-	        "initial": "\uFD98"
-	    },
-	    "\u0646\u062C\u0649": {
-	        "final": "\uFD99"
-	    },
-	    "\u0646\u0645\u064A": {
-	        "final": "\uFD9A"
-	    },
-	    "\u0646\u0645\u0649": {
-	        "final": "\uFD9B"
-	    },
-	    "\u064A\u0645\u0645": {
-	        "final": "\uFD9C",
-	        "initial": "\uFD9D"
-	    },
-	    "\u0628\u062E\u064A": {
-	        "final": "\uFD9E"
-	    },
-	    "\u062A\u062C\u064A": {
-	        "final": "\uFD9F"
-	    },
-	    "\u062A\u062C\u0649": {
-	        "final": "\uFDA0"
-	    },
-	    "\u062A\u062E\u064A": {
-	        "final": "\uFDA1"
-	    },
-	    "\u062A\u062E\u0649": {
-	        "final": "\uFDA2"
-	    },
-	    "\u062A\u0645\u064A": {
-	        "final": "\uFDA3"
-	    },
-	    "\u062A\u0645\u0649": {
-	        "final": "\uFDA4"
-	    },
-	    "\u062C\u0645\u064A": {
-	        "final": "\uFDA5"
-	    },
-	    "\u062C\u062D\u0649": {
-	        "final": "\uFDA6"
-	    },
-	    "\u062C\u0645\u0649": {
-	        "final": "\uFDA7"
-	    },
-	    "\u0633\u062E\u0649": {
-	        "final": "\uFDA8"
-	    },
-	    "\u0635\u062D\u064A": {
-	        "final": "\uFDA9"
-	    },
-	    "\u0634\u062D\u064A": {
-	        "final": "\uFDAA"
-	    },
-	    "\u0636\u062D\u064A": {
-	        "final": "\uFDAB"
-	    },
-	    "\u0644\u062C\u064A": {
-	        "final": "\uFDAC"
-	    },
-	    "\u0644\u0645\u064A": {
-	        "final": "\uFDAD"
-	    },
-	    "\u064A\u062D\u064A": {
-	        "final": "\uFDAE"
-	    },
-	    "\u064A\u062C\u064A": {
-	        "final": "\uFDAF"
-	    },
-	    "\u064A\u0645\u064A": {
-	        "final": "\uFDB0"
-	    },
-	    "\u0645\u0645\u064A": {
-	        "final": "\uFDB1"
-	    },
-	    "\u0642\u0645\u064A": {
-	        "final": "\uFDB2"
-	    },
-	    "\u0646\u062D\u064A": {
-	        "final": "\uFDB3"
-	    },
-	    "\u0639\u0645\u064A": {
-	        "final": "\uFDB6"
-	    },
-	    "\u0643\u0645\u064A": {
-	        "final": "\uFDB7"
-	    },
-	    "\u0646\u062C\u062D": {
-	        "initial": "\uFDB8",
-	        "final": "\uFDBD"
-	    },
-	    "\u0645\u062E\u064A": {
-	        "final": "\uFDB9"
-	    },
-	    "\u0644\u062C\u0645": {
-	        "initial": "\uFDBA",
-	        "final": "\uFDBC"
-	    },
-	    "\u0643\u0645\u0645": {
-	        "final": "\uFDBB",
-	        "initial": "\uFDC3"
-	    },
-	    "\u062C\u062D\u064A": {
-	        "final": "\uFDBE"
-	    },
-	    "\u062D\u062C\u064A": {
-	        "final": "\uFDBF"
-	    },
-	    "\u0645\u062C\u064A": {
-	        "final": "\uFDC0"
-	    },
-	    "\u0641\u0645\u064A": {
-	        "final": "\uFDC1"
-	    },
-	    "\u0628\u062D\u064A": {
-	        "final": "\uFDC2"
-	    },
-	    "\u0633\u062E\u064A": {
-	        "final": "\uFDC6"
-	    },
-	    "\u0646\u062C\u064A": {
-	        "final": "\uFDC7"
-	    },
-	    "\u0644\u0622": {
-	        "isolated": "\uFEF5",
-	        "final": "\uFEF6"
-	    },
-	    "\u0644\u0623": {
-	        "isolated": "\uFEF7",
-	        "final": "\uFEF8"
-	    },
-	    "\u0644\u0625": {
-	        "isolated": "\uFEF9",
-	        "final": "\uFEFA"
-	    },
-	    "\u0644\u0627": {
-	        "isolated": "\uFEFB",
-	        "final": "\uFEFC"
-	    },
-	    "words": {
-	        "\u0635\u0644\u06D2": "\uFDF0",
-	        "\u0642\u0644\u06D2": "\uFDF1",
-	        "\u0627\u0644\u0644\u0647": "\uFDF2",
-	        "\u0627\u0643\u0628\u0631": "\uFDF3",
-	        "\u0645\u062D\u0645\u062F": "\uFDF4",
-	        "\u0635\u0644\u0639\u0645": "\uFDF5",
-	        "\u0631\u0633\u0648\u0644": "\uFDF6",
-	        "\u0639\u0644\u064A\u0647": "\uFDF7",
-	        "\u0648\u0633\u0644\u0645": "\uFDF8",
-	        "\u0635\u0644\u0649": "\uFDF9",
-	        "\u0635\u0644\u0649\u0627\u0644\u0644\u0647\u0639\u0644\u064A\u0647\u0648\u0633\u0644\u0645": "\uFDFA",
-	        "\u062C\u0644\u062C\u0644\u0627\u0644\u0647": "\uFDFB",
-	        "\u0631\u06CC\u0627\u0644": "\uFDFC"
-	    }
-	};
-	exports.default = ligatureReference;
-	});
-
-	var reference = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-	var letterList = Object.keys(unicodeArabic.default);
-	exports.letterList = letterList;
-	var ligatureList = Object.keys(unicodeLigatures.default);
-	exports.ligatureList = ligatureList;
-	var ligatureWordList = Object.keys(unicodeLigatures.default.words);
-	exports.ligatureWordList = ligatureWordList;
-	var lams = '\u0644\u06B5\u06B6\u06B7\u06B8';
-	exports.lams = lams;
-	var alefs = '\u0627\u0622\u0623\u0625\u0671\u0672\u0673\u0675\u0773\u0774';
-	exports.alefs = alefs;
-	// for (var l = 1; l < lams.length; l++) {
-	//   console.log('-');
-	//   for (var a = 0; a < alefs.length; a++) {
-	//     console.log(a + ': ' + lams[l] + alefs[a]);
-	//   }
-	// }
-	var tashkeel = '\u0605\u0640\u0670\u0674\u06DF\u06E7\u06E8';
-	exports.tashkeel = tashkeel;
-	function addToTashkeel(start, finish) {
-	    for (var i = start; i <= finish; i++) {
-	        exports.tashkeel = tashkeel += String.fromCharCode(i);
-	    }
-	}
-	addToTashkeel(0x0610, 0x061A);
-	addToTashkeel(0x064B, 0x065F);
-	addToTashkeel(0x06D6, 0x06DC);
-	addToTashkeel(0x06E0, 0x06E4);
-	addToTashkeel(0x06EA, 0x06ED);
-	addToTashkeel(0x08D3, 0x08E1);
-	addToTashkeel(0x08E3, 0x08FF);
-	addToTashkeel(0xFE70, 0xFE7F);
-	var lineBreakers = '\u0627\u0629\u0648\u06C0\u06CF\u06FD\u06FE\u076B\u076C\u0771\u0773\u0774\u0778\u0779\u08E2\u08B1\u08B2\u08B9';
-	exports.lineBreakers = lineBreakers;
-	function addToLineBreakers(start, finish) {
-	    for (var i = start; i <= finish; i++) {
-	        exports.lineBreakers = lineBreakers += String.fromCharCode(i);
-	    }
+	function selection_interrupt (name) {
+	  return this.each(function () {
+	    interrupt(this, name);
+	  });
 	}
-	addToLineBreakers(0x0600, 0x061F); // it's OK to include tashkeel in this range as it is ignored
-	addToLineBreakers(0x0621, 0x0625);
-	addToLineBreakers(0x062F, 0x0632);
-	addToLineBreakers(0x0660, 0x066D); // numerals, math
-	addToLineBreakers(0x0671, 0x0677);
-	addToLineBreakers(0x0688, 0x0699);
-	addToLineBreakers(0x06C3, 0x06CB);
-	addToLineBreakers(0x06D2, 0x06F9);
-	addToLineBreakers(0x0759, 0x075B);
-	addToLineBreakers(0x08AA, 0x08AE);
-	addToLineBreakers(0xFB50, 0xFDFD); // presentation forms look like they could connect, but never do
-	// Presentation Forms A includes diacritics but they are meant to stand alone
-	addToLineBreakers(0xFE80, 0xFEFC); // presentation forms look like they could connect, but never do
-	// numerals, math
-	addToLineBreakers(0x10E60, 0x10E7F);
-	addToLineBreakers(0x1EC70, 0x1ECBF);
-	addToLineBreakers(0x1EE00, 0x1EEFF);
-	});
 
-	var GlyphSplitter_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
+	function tweenRemove(id, name) {
+	  var tween0, tween1;
+	  return function () {
+	    var schedule = set(this, id),
+	        tween = schedule.tween; // If this node shared tween with the previous node,
+	    // just assign the updated shared tween and we’re done!
+	    // Otherwise, copy-on-write.
 
+	    if (tween !== tween0) {
+	      tween1 = tween0 = tween;
 
-	function GlyphSplitter(word) {
-	    var letters = [];
-	    var lastLetter = '';
-	    word.split('').forEach(function (letter) {
-	        if (isArabic_1.isArabic(letter)) {
-	            if (reference.tashkeel.indexOf(letter) > -1) {
-	                letters[letters.length - 1] += letter;
-	            }
-	            else if (lastLetter.length && ((reference.lams.indexOf(lastLetter) === 0 && reference.alefs.indexOf(letter) > -1) || (reference.lams.indexOf(lastLetter) > 0 && reference.alefs.indexOf(letter) === 0))) {
-	                // valid LA forms
-	                letters[letters.length - 1] += letter;
-	            }
-	            else {
-	                letters.push(letter);
-	            }
-	        }
-	        else {
-	            letters.push(letter);
-	        }
-	        if (reference.tashkeel.indexOf(letter) === -1) {
-	            lastLetter = letter;
+	      for (var i = 0, n = tween1.length; i < n; ++i) {
+	        if (tween1[i].name === name) {
+	          tween1 = tween1.slice();
+	          tween1.splice(i, 1);
+	          break;
 	        }
-	    });
-	    return letters;
-	}
-	exports.GlyphSplitter = GlyphSplitter;
-	});
-
-	var BaselineSplitter_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
+	      }
+	    }
 
-	function BaselineSplitter(word) {
-	    var letters = [];
-	    var lastLetter = '';
-	    word.split('').forEach(function (letter) {
-	        if (isArabic_1.isArabic(letter) && isArabic_1.isArabic(lastLetter)) {
-	            if (lastLetter.length && reference.tashkeel.indexOf(letter) > -1) {
-	                letters[letters.length - 1] += letter;
-	            }
-	            else if (reference.lineBreakers.indexOf(lastLetter) > -1) {
-	                letters.push(letter);
-	            }
-	            else {
-	                letters[letters.length - 1] += letter;
-	            }
-	        }
-	        else {
-	            letters.push(letter);
-	        }
-	        if (reference.tashkeel.indexOf(letter) === -1) {
-	            // don't allow tashkeel to hide line break
-	            lastLetter = letter;
-	        }
-	    });
-	    return letters;
+	    schedule.tween = tween1;
+	  };
 	}
-	exports.BaselineSplitter = BaselineSplitter;
-	});
-
-	var Normalization = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
 
+	function tweenFunction(id, name, value) {
+	  var tween0, tween1;
+	  if (typeof value !== "function") throw new Error();
+	  return function () {
+	    var schedule = set(this, id),
+	        tween = schedule.tween; // If this node shared tween with the previous node,
+	    // just assign the updated shared tween and we’re done!
+	    // Otherwise, copy-on-write.
 
+	    if (tween !== tween0) {
+	      tween1 = (tween0 = tween).slice();
 
-	function Normal(word, breakPresentationForm) {
-	    // default is to turn initial/isolated/medial/final presentation form to generic
-	    if (typeof breakPresentationForm === 'undefined') {
-	        breakPresentationForm = true;
-	    }
-	    var returnable = '';
-	    word.split('').forEach(function (letter) {
-	        if (!isArabic_1.isArabic(letter)) {
-	            returnable += letter;
-	            return;
-	        }
-	        for (var w = 0; w < reference.letterList.length; w++) {
-	            // ok so we are checking this potential lettertron
-	            var letterForms = unicodeArabic.default[reference.letterList[w]];
-	            var versions = Object.keys(letterForms);
-	            for (var v = 0; v < versions.length; v++) {
-	                var localVersion = letterForms[versions[v]];
-	                if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-	                    // look at this embedded object
-	                    var embeddedForms = Object.keys(localVersion);
-	                    for (var ef = 0; ef < embeddedForms.length; ef++) {
-	                        var form = localVersion[embeddedForms[ef]];
-	                        if (form === letter || (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1)) {
-	                            // match
-	                            // console.log('embedded match');
-	                            if (form === letter) {
-	                                // match exact
-	                                if (breakPresentationForm && localVersion['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(embeddedForms[ef]) > -1) {
-	                                    // replace presentation form
-	                                    // console.log('keeping normal form of the letter');
-	                                    if (typeof localVersion['normal'] === 'object') {
-	                                        returnable += localVersion['normal'][0];
-	                                    }
-	                                    else {
-	                                        returnable += localVersion['normal'];
-	                                    }
-	                                    return;
-	                                }
-	                                // console.log('keeping this letter');
-	                                returnable += letter;
-	                                return;
-	                            }
-	                            else if (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1) {
-	                                // match
-	                                returnable += form[0];
-	                                // console.log('added the first letter from the same array');
-	                                return;
-	                            }
-	                        }
-	                    }
-	                }
-	                else if (localVersion === letter) {
-	                    // match exact
-	                    if (breakPresentationForm && letterForms['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(versions[v]) > -1) {
-	                        // replace presentation form
-	                        // console.log('keeping normal form of the letter');
-	                        if (typeof letterForms['normal'] === 'object') {
-	                            returnable += letterForms['normal'][0];
-	                        }
-	                        else {
-	                            returnable += letterForms['normal'];
-	                        }
-	                        return;
-	                    }
-	                    // console.log('keeping this letter');
-	                    returnable += letter;
-	                    return;
-	                }
-	                else if (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
-	                    // match
-	                    returnable += localVersion[0];
-	                    // console.log('added the first letter from the same array');
-	                    return;
-	                }
-	            }
-	        }
-	        // try ligatures
-	        for (var v2 = 0; v2 < reference.ligatureList.length; v2++) {
-	            var normalForm = reference.ligatureList[v2];
-	            if (normalForm !== 'words') {
-	                var ligForms = Object.keys(unicodeLigatures.default[normalForm]);
-	                for (var f = 0; f < ligForms.length; f++) {
-	                    if (unicodeLigatures.default[normalForm][ligForms[f]] === letter) {
-	                        returnable += normalForm;
-	                        return;
-	                    }
-	                }
-	            }
-	        }
-	        // try words ligatures
-	        for (var v3 = 0; v3 < reference.ligatureWordList.length; v3++) {
-	            var normalForm$1 = reference.ligatureWordList[v3];
-	            if (unicodeLigatures.default.words[normalForm$1] === letter) {
-	                returnable += normalForm$1;
-	                return;
-	            }
+	      for (var t = {
+	        name: name,
+	        value: value
+	      }, i = 0, n = tween1.length; i < n; ++i) {
+	        if (tween1[i].name === name) {
+	          tween1[i] = t;
+	          break;
 	        }
-	        returnable += letter;
-	        // console.log('kept the letter')
-	    });
-	    return returnable;
-	}
-	exports.Normal = Normal;
-	});
-
-	var CharShaper_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
+	      }
 
-	function CharShaper(letter, form) {
-	    if (!isArabic_1.isArabic(letter)) {
-	        // fail not Arabic
-	        throw new Error('Not Arabic');
-	    }
-	    if (letter === "\u0621") {
-	        // hamza alone
-	        return "\u0621";
-	    }
-	    for (var w = 0; w < reference.letterList.length; w++) {
-	        // ok so we are checking this potential lettertron
-	        var letterForms = unicodeArabic.default[reference.letterList[w]];
-	        var versions = Object.keys(letterForms);
-	        for (var v = 0; v < versions.length; v++) {
-	            var localVersion = letterForms[versions[v]];
-	            if ((localVersion === letter) ||
-	                (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1)) {
-	                if (versions.indexOf(form) > -1) {
-	                    return letterForms[form];
-	                }
-	            }
-	            else if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-	                // check embedded
-	                var embeddedVersions = Object.keys(localVersion);
-	                for (var ev = 0; ev < embeddedVersions.length; ev++) {
-	                    if ((localVersion[embeddedVersions[ev]] === letter) ||
-	                        (typeof localVersion[embeddedVersions[ev]] === 'object' && localVersion[embeddedVersions[ev]].indexOf && localVersion[embeddedVersions[ev]].indexOf(letter) > -1)) {
-	                        if (embeddedVersions.indexOf(form) > -1) {
-	                            return localVersion[form];
-	                        }
-	                    }
-	                }
-	            }
-	        }
+	      if (i === n) tween1.push(t);
 	    }
-	}
-	exports.CharShaper = CharShaper;
-	});
-
-	var WordShaper_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
 
+	    schedule.tween = tween1;
+	  };
+	}
 
+	function transition_tween (name, value) {
+	  var id = this._id;
+	  name += "";
 
+	  if (arguments.length < 2) {
+	    var tween = get$1(this.node(), id).tween;
 
-	function WordShaper(word) {
-	    var state = 'initial';
-	    var output = '';
-	    for (var w = 0; w < word.length; w++) {
-	        var nextLetter = ' ';
-	        for (var nxw = w + 1; nxw < word.length; nxw++) {
-	            if (!isArabic_1.isArabic(word[nxw])) {
-	                break;
-	            }
-	            if (reference.tashkeel.indexOf(word[nxw]) === -1) {
-	                nextLetter = word[nxw];
-	                break;
-	            }
-	        }
-	        if (!isArabic_1.isArabic(word[w]) || isArabic_1.isMath(word[w])) {
-	            // space or other non-Arabic
-	            output += word[w];
-	            state = 'initial';
-	        }
-	        else if (reference.tashkeel.indexOf(word[w]) > -1) {
-	            // tashkeel - add without changing state
-	            output += word[w];
-	        }
-	        else if ((nextLetter === ' ') // last Arabic letter in this word
-	            || (reference.lineBreakers.indexOf(word[w]) > -1)) { // the current letter is known to break lines
-	            output += CharShaper_1.CharShaper(word[w], state === 'initial' ? 'isolated' : 'final');
-	            state = 'initial';
-	        }
-	        else if (reference.lams.indexOf(word[w]) > -1 && reference.alefs.indexOf(nextLetter) > -1) {
-	            // LA letters - advance an additional letter after this
-	            output += unicodeLigatures.default[word[w] + nextLetter][(state === 'initial' ? 'isolated' : 'final')];
-	            while (word[w] !== nextLetter) {
-	                w++;
-	            }
-	            state = 'initial';
-	        }
-	        else {
-	            output += CharShaper_1.CharShaper(word[w], state);
-	            state = 'medial';
-	        }
+	    for (var i = 0, n = tween.length, t; i < n; ++i) {
+	      if ((t = tween[i]).name === name) {
+	        return t.value;
+	      }
 	    }
-	    return output;
-	}
-	exports.WordShaper = WordShaper;
-	});
-
-	var ParentLetter_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
 
+	    return null;
+	  }
 
-	function ParentLetter(letter) {
-	    if (!isArabic_1.isArabic(letter)) {
-	        throw new Error('Not an Arabic letter');
-	    }
-	    for (var w = 0; w < reference.letterList.length; w++) {
-	        // ok so we are checking this potential lettertron
-	        var letterForms = unicodeArabic.default[reference.letterList[w]];
-	        var versions = Object.keys(letterForms);
-	        for (var v = 0; v < versions.length; v++) {
-	            var localVersion = letterForms[versions[v]];
-	            if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-	                // look at this embedded object
-	                var embeddedForms = Object.keys(localVersion);
-	                for (var ef = 0; ef < embeddedForms.length; ef++) {
-	                    var form = localVersion[embeddedForms[ef]];
-	                    if (form === letter || (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1)) {
-	                        // match
-	                        return localVersion;
-	                    }
-	                }
-	            }
-	            else if (localVersion === letter || (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1)) {
-	                // match
-	                return letterForms;
-	            }
-	        }
-	        return null;
-	    }
+	  return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
 	}
-	exports.ParentLetter = ParentLetter;
-	function GrandparentLetter(letter) {
-	    if (!isArabic_1.isArabic(letter)) {
-	        throw new Error('Not an Arabic letter');
-	    }
-	    for (var w = 0; w < reference.letterList.length; w++) {
-	        // ok so we are checking this potential lettertron
-	        var letterForms = unicodeArabic.default[reference.letterList[w]];
-	        var versions = Object.keys(letterForms);
-	        for (var v = 0; v < versions.length; v++) {
-	            var localVersion = letterForms[versions[v]];
-	            if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-	                // look at this embedded object
-	                var embeddedForms = Object.keys(localVersion);
-	                for (var ef = 0; ef < embeddedForms.length; ef++) {
-	                    var form = localVersion[embeddedForms[ef]];
-	                    if (form === letter || (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1)) {
-	                        // match
-	                        return letterForms;
-	                    }
-	                }
-	            }
-	            else if (localVersion === letter || (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1)) {
-	                // match
-	                return letterForms;
-	            }
-	        }
-	        return null;
-	    }
+	function tweenValue(transition, name, value) {
+	  var id = transition._id;
+	  transition.each(function () {
+	    var schedule = set(this, id);
+	    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
+	  });
+	  return function (node) {
+	    return get$1(node, id).value[name];
+	  };
 	}
-	exports.GrandparentLetter = GrandparentLetter;
-	});
-
-	var lib$1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-	exports.isArabic = isArabic_1.isArabic;
-
-	exports.GlyphSplitter = GlyphSplitter_1.GlyphSplitter;
-
-	exports.BaselineSplitter = BaselineSplitter_1.BaselineSplitter;
-
-	exports.Normal = Normalization.Normal;
-
-	exports.CharShaper = CharShaper_1.CharShaper;
-
-	exports.WordShaper = WordShaper_1.WordShaper;
 
-	exports.ParentLetter = ParentLetter_1.ParentLetter;
-	exports.GrandparentLetter = ParentLetter_1.GrandparentLetter;
-	});
-
-	// see https://github.com/openstreetmap/iD/pull/3707
-
-	var rtlRegex = /[\u0590-\u05FF\u0600-\u06FF\u0750-\u07BF\u08A0–\u08BF]/;
-
-	function fixRTLTextForSvg(inputText) {
-	    var ret = '', rtlBuffer = [];
-	    var arabicRegex = /[\u0600-\u06FF]/g;
-	    var arabicDiacritics = /[\u0610-\u061A\u064B-\u065F\u0670\u06D6-\u06ED]/g;
-	    var arabicMath = /[\u0660-\u066C\u06F0-\u06F9]+/g;
-	    var thaanaVowel = /[\u07A6-\u07B0]/;
-	    var hebrewSign = /[\u0591-\u05bd\u05bf\u05c1-\u05c5\u05c7]/;
-
-	    // Arabic word shaping
-	    if (arabicRegex.test(inputText)) {
-	        inputText = lib$1.WordShaper(inputText);
-	    }
-
-	    for (var n = 0; n < inputText.length; n++) {
-	        var c = inputText[n];
-	        if (arabicMath.test(c)) {
-	            // Arabic numbers go LTR
-	            ret += rtlBuffer.reverse().join('');
-	            rtlBuffer = [c];
-	        } else {
-	            if (rtlBuffer.length && arabicMath.test(rtlBuffer[rtlBuffer.length - 1])) {
-	                ret += rtlBuffer.reverse().join('');
-	                rtlBuffer = [];
-	            }
-	            if ((thaanaVowel.test(c) || hebrewSign.test(c) || arabicDiacritics.test(c)) && rtlBuffer.length) {
-	                rtlBuffer[rtlBuffer.length - 1] += c;
-	            } else if (rtlRegex.test(c)
-	                // include Arabic presentation forms
-	                || (c.charCodeAt(0) >= 64336 && c.charCodeAt(0) <= 65023)
-	                || (c.charCodeAt(0) >= 65136 && c.charCodeAt(0) <= 65279)) {
-	                rtlBuffer.push(c);
-	            } else if (c === ' ' && rtlBuffer.length) {
-	                // whitespace within RTL text
-	                rtlBuffer = [rtlBuffer.reverse().join('') + ' '];
-	            } else {
-	                // non-RTL character
-	                ret += rtlBuffer.reverse().join('') + c;
-	                rtlBuffer = [];
-	            }
-	        }
-	    }
-	    ret += rtlBuffer.reverse().join('');
-	    return ret;
+	function interpolate (a, b) {
+	  var c;
+	  return (typeof b === "number" ? d3_interpolateNumber : b instanceof color ? d3_interpolateRgb : (c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString)(a, b);
 	}
 
-	// https://github.com/openstreetmap/iD/issues/772
-	// http://mathiasbynens.be/notes/localstorage-pattern#comment-9
-	var _storage;
-	try { _storage = localStorage; } catch (e) {}  // eslint-disable-line no-empty
-	_storage = _storage || (function () {
-	  var s = {};
-	  return {
-	    getItem: function (k) { return s[k]; },
-	    setItem: function (k, v) { return s[k] = v; },
-	    removeItem: function (k) { return delete s[k]; }
+	function attrRemove(name) {
+	  return function () {
+	    this.removeAttribute(name);
 	  };
-	})();
-
-	//
-	// corePreferences is an interface for persisting basic key-value strings
-	// within and between iD sessions on the same site.
-	//
-	function corePreferences(k, v) {
+	}
 
-	  try {
-	    if (arguments.length === 1) { return _storage.getItem(k); }
-	    else if (v === null) { _storage.removeItem(k); }
-	    else { _storage.setItem(k, v); }
-	  } catch (e) {
-	    /* eslint-disable no-console */
-	    if (typeof console !== 'undefined') {
-	      console.error('localStorage quota exceeded');
-	    }
-	    /* eslint-enable no-console */
-	  }
+	function attrRemoveNS(fullname) {
+	  return function () {
+	    this.removeAttributeNS(fullname.space, fullname.local);
+	  };
+	}
 
+	function attrConstant(name, interpolate, value1) {
+	  var string00,
+	      string1 = value1 + "",
+	      interpolate0;
+	  return function () {
+	    var string0 = this.getAttribute(name);
+	    return string0 === string1 ? null : string0 === string00 ? interpolate0 : interpolate0 = interpolate(string00 = string0, value1);
+	  };
 	}
 
-	function responseText(response) {
-	  if (!response.ok) { throw new Error(response.status + " " + response.statusText); }
-	  return response.text();
+	function attrConstantNS(fullname, interpolate, value1) {
+	  var string00,
+	      string1 = value1 + "",
+	      interpolate0;
+	  return function () {
+	    var string0 = this.getAttributeNS(fullname.space, fullname.local);
+	    return string0 === string1 ? null : string0 === string00 ? interpolate0 : interpolate0 = interpolate(string00 = string0, value1);
+	  };
 	}
 
-	function d3_text(input, init) {
-	  return fetch(input, init).then(responseText);
+	function attrFunction(name, interpolate, value) {
+	  var string00, string10, interpolate0;
+	  return function () {
+	    var string0,
+	        value1 = value(this),
+	        string1;
+	    if (value1 == null) return void this.removeAttribute(name);
+	    string0 = this.getAttribute(name);
+	    string1 = value1 + "";
+	    return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+	  };
 	}
 
-	function responseJson(response) {
-	  if (!response.ok) { throw new Error(response.status + " " + response.statusText); }
-	  if (response.status === 204 || response.status === 205) { return; }
-	  return response.json();
+	function attrFunctionNS(fullname, interpolate, value) {
+	  var string00, string10, interpolate0;
+	  return function () {
+	    var string0,
+	        value1 = value(this),
+	        string1;
+	    if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
+	    string0 = this.getAttributeNS(fullname.space, fullname.local);
+	    string1 = value1 + "";
+	    return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+	  };
 	}
 
-	function d3_json(input, init) {
-	  return fetch(input, init).then(responseJson);
+	function transition_attr (name, value) {
+	  var fullname = namespace(name),
+	      i = fullname === "transform" ? interpolateTransformSvg : interpolate;
+	  return this.attrTween(name, typeof value === "function" ? (fullname.local ? attrFunctionNS : attrFunction)(fullname, i, tweenValue(this, "attr." + name, value)) : value == null ? (fullname.local ? attrRemoveNS : attrRemove)(fullname) : (fullname.local ? attrConstantNS : attrConstant)(fullname, i, value));
 	}
 
-	function parser(type) {
-	  return function(input, init)  {
-	    return d3_text(input, init).then(function(text) {
-	      return (new DOMParser).parseFromString(text, type);
-	    });
+	function attrInterpolate(name, i) {
+	  return function (t) {
+	    this.setAttribute(name, i.call(this, t));
 	  };
 	}
 
-	var d3_xml = parser("application/xml");
+	function attrInterpolateNS(fullname, i) {
+	  return function (t) {
+	    this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));
+	  };
+	}
 
-	var svg = parser("image/svg+xml");
+	function attrTweenNS(fullname, value) {
+	  var t0, i0;
 
-	var _mainFileFetcher = coreFileFetcher(); // singleton
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t0 = (i0 = i) && attrInterpolateNS(fullname, i);
+	    return t0;
+	  }
 
-	//
-	// coreFileFetcher asynchronously fetches data from JSON files
-	//
-	function coreFileFetcher() {
-	  var _this = {};
-	  var _inflight = {};
-	  var _fileMap = {
-	    'address_formats': 'data/address_formats.min.json',
-	    'deprecated': 'data/deprecated.min.json',
-	    'discarded': 'data/discarded.min.json',
-	    'imagery': 'data/imagery.min.json',
-	    'intro_graph': 'data/intro_graph.min.json',
-	    'keepRight': 'data/keepRight.min.json',
-	    'languages': 'data/languages.min.json',
-	    'locales': 'data/locales.min.json',
-	    'nsi_brands': 'https://cdn.jsdelivr.net/npm/name-suggestion-index@4/dist/brands.min.json',
-	    'nsi_filters': 'https://cdn.jsdelivr.net/npm/name-suggestion-index@4/dist/filters.min.json',
-	    'oci_features': 'https://cdn.jsdelivr.net/npm/osm-community-index@2/dist/features.min.json',
-	    'oci_resources': 'https://cdn.jsdelivr.net/npm/osm-community-index@2/dist/resources.min.json',
-	    'preset_categories': 'data/preset_categories.min.json',
-	    'preset_defaults': 'data/preset_defaults.min.json',
-	    'preset_fields': 'data/preset_fields.min.json',
-	    'preset_presets': 'data/preset_presets.min.json',
-	    'phone_formats': 'data/phone_formats.min.json',
-	    'qa_data': 'data/qa_data.min.json',
-	    'shortcuts': 'data/shortcuts.min.json',
-	    'territory_languages': 'data/territory_languages.min.json',
-	    'wmf_sitematrix': 'https://cdn.jsdelivr.net/npm/wmf-sitematrix@0.1/wikipedia.min.json'
-	  };
+	  tween._value = value;
+	  return tween;
+	}
 
-	  var _cachedData = {};
-	  // expose the cache; useful for tests
-	  _this.cache = function () { return _cachedData; };
+	function attrTween(name, value) {
+	  var t0, i0;
 
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t0 = (i0 = i) && attrInterpolate(name, i);
+	    return t0;
+	  }
 
-	  // Returns a Promise to fetch data
-	  // (resolved with the data if we have it already)
-	  _this.get = function (which) {
-	    if (_cachedData[which]) {
-	      return Promise.resolve(_cachedData[which]);
-	    }
+	  tween._value = value;
+	  return tween;
+	}
 
-	    var file = _fileMap[which];
-	    var url = file && _this.asset(file);
-	    if (!url) {
-	      return Promise.reject(("Unknown data file for \"" + which + "\""));
-	    }
+	function transition_attrTween (name, value) {
+	  var key = "attr." + name;
+	  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+	  if (value == null) return this.tween(key, null);
+	  if (typeof value !== "function") throw new Error();
+	  var fullname = namespace(name);
+	  return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
+	}
 
-	    var prom = _inflight[url];
-	    if (!prom) {
-	      _inflight[url] = prom = d3_json(url)
-	        .then(function (result) {
-	          delete _inflight[url];
-	          if (!result) {
-	            throw new Error(("No data loaded for \"" + which + "\""));
-	          }
-	          _cachedData[which] = result;
-	          return result;
-	        })
-	        .catch(function (err) {
-	          delete _inflight[url];
-	          throw err;
-	        });
-	    }
+	function delayFunction(id, value) {
+	  return function () {
+	    init(this, id).delay = +value.apply(this, arguments);
+	  };
+	}
 
-	    return prom;
+	function delayConstant(id, value) {
+	  return value = +value, function () {
+	    init(this, id).delay = value;
 	  };
+	}
 
+	function transition_delay (value) {
+	  var id = this._id;
+	  return arguments.length ? this.each((typeof value === "function" ? delayFunction : delayConstant)(id, value)) : get$1(this.node(), id).delay;
+	}
 
-	  // Accessor for the file map
-	  _this.fileMap = function(val) {
-	    if (!arguments.length) { return _fileMap; }
-	    _fileMap = val;
-	    return _this;
+	function durationFunction(id, value) {
+	  return function () {
+	    set(this, id).duration = +value.apply(this, arguments);
 	  };
+	}
 
-	  var _assetPath = '';
-	  _this.assetPath = function(val) {
-	    if (!arguments.length) { return _assetPath; }
-	    _assetPath = val;
-	    return _this;
+	function durationConstant(id, value) {
+	  return value = +value, function () {
+	    set(this, id).duration = value;
 	  };
+	}
 
-	  var _assetMap = {};
-	  _this.assetMap = function(val) {
-	    if (!arguments.length) { return _assetMap; }
-	    _assetMap = val;
-	    return _this;
-	  };
+	function transition_duration (value) {
+	  var id = this._id;
+	  return arguments.length ? this.each((typeof value === "function" ? durationFunction : durationConstant)(id, value)) : get$1(this.node(), id).duration;
+	}
 
-	  _this.asset = function (val) {
-	    if (/^http(s)?:\/\//i.test(val)) { return val; }
-	    var filename = _assetPath + val;
-	    return _assetMap[filename] || filename;
+	function easeConstant(id, value) {
+	  if (typeof value !== "function") throw new Error();
+	  return function () {
+	    set(this, id).ease = value;
 	  };
+	}
 
-	  return _this;
+	function transition_ease (value) {
+	  var id = this._id;
+	  return arguments.length ? this.each(easeConstant(id, value)) : get$1(this.node(), id).ease;
 	}
 
-	var _detected;
+	function easeVarying(id, value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (typeof v !== "function") throw new Error();
+	    set(this, id).ease = v;
+	  };
+	}
 
-	function utilDetect(refresh) {
-	  if (_detected && !refresh) { return _detected; }
-	  _detected = {};
+	function transition_easeVarying (value) {
+	  if (typeof value !== "function") throw new Error();
+	  return this.each(easeVarying(this._id, value));
+	}
 
-	  var ua = navigator.userAgent;
-	  var m = null;
+	function transition_filter (match) {
+	  if (typeof match !== "function") match = matcher(match);
 
-	  /* Browser */
-	  m = ua.match(/(edge)\/?\s*(\.?\d+(\.\d+)*)/i);   // Edge
-	  if (m !== null) {
-	    _detected.browser = m[1];
-	    _detected.version = m[2];
-	  }
-	  if (!_detected.browser) {
-	    m = ua.match(/Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/i);   // IE11
-	    if (m !== null) {
-	      _detected.browser = 'msie';
-	      _detected.version = m[1];
-	    }
-	  }
-	  if (!_detected.browser) {
-	    m = ua.match(/(opr)\/?\s*(\.?\d+(\.\d+)*)/i);   // Opera 15+
-	    if (m !== null) {
-	      _detected.browser = 'Opera';
-	      _detected.version = m[2];
-	    }
-	  }
-	  if (!_detected.browser) {
-	    m = ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);
-	    if (m !== null) {
-	      _detected.browser = m[1];
-	      _detected.version = m[2];
-	      m = ua.match(/version\/([\.\d]+)/i);
-	      if (m !== null) { _detected.version = m[1]; }
+	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+	      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+	        subgroup.push(node);
+	      }
 	    }
 	  }
-	  if (!_detected.browser) {
-	    _detected.browser = navigator.appName;
-	    _detected.version = navigator.appVersion;
-	  }
-
-	  // keep major.minor version only..
-	  _detected.version = _detected.version.split(/\W/).slice(0,2).join('.');
-
-	  // detect other browser capabilities
-	  // Legacy Opera has incomplete svg style support. See #715
-	  _detected.opera = (_detected.browser.toLowerCase() === 'opera' && parseFloat(_detected.version) < 15 );
 
-	  if (_detected.browser.toLowerCase() === 'msie') {
-	    _detected.ie = true;
-	    _detected.browser = 'Internet Explorer';
-	    _detected.support = parseFloat(_detected.version) >= 11;
-	  } else {
-	    _detected.ie = false;
-	    _detected.support = true;
-	  }
-
-	  _detected.filedrop = (window.FileReader && 'ondrop' in window);
-	  _detected.download = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
-	  _detected.cssfilters = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
+	  return new Transition(subgroups, this._parents, this._name, this._id);
+	}
 
+	function transition_merge (transition) {
+	  if (transition._id !== this._id) throw new Error();
 
-	  /* Platform */
-	  if (/Win/.test(ua)) {
-	    _detected.os = 'win';
-	    _detected.platform = 'Windows';
-	  } else if (/Mac/.test(ua)) {
-	    _detected.os = 'mac';
-	    _detected.platform = 'Macintosh';
-	  } else if (/X11/.test(ua) || /Linux/.test(ua)) {
-	    _detected.os = 'linux';
-	    _detected.platform = 'Linux';
-	  } else {
-	    _detected.os = 'win';
-	    _detected.platform = 'Unknown';
+	  for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+	    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+	      if (node = group0[i] || group1[i]) {
+	        merge[i] = node;
+	      }
+	    }
 	  }
 
-	  _detected.isMobileWebKit = (/\b(iPad|iPhone|iPod)\b/.test(ua) ||
-	    // HACK: iPadOS 13+ requests desktop sites by default by using a Mac user agent,
-	    // so assume any "mac" with multitouch is actually iOS
-	    (navigator.platform === 'MacIntel' && 'maxTouchPoints' in navigator && navigator.maxTouchPoints > 1)) &&
-	    /WebKit/.test(ua) &&
-	    !/Edge/.test(ua) &&
-	    !window.MSStream;
-
-
-	  /* Locale */
-	  // An array of locales requested by the browser in priority order.
-	  _detected.browserLocales = Array.from(new Set( // remove duplicates
-	      [navigator.language]
-	        .concat(navigator.languages || [])
-	        .concat([
-	            // old property for backwards compatibility
-	            navigator.userLanguage,
-	            // fallback to English
-	            'en'
-	        ])
-	        // remove any undefined values
-	        .filter(Boolean)
-	    ));
-
-
-	  /* Host */
-	  var loc = window.top.location;
-	  var origin = loc.origin;
-	  if (!origin) {  // for unpatched IE11
-	    origin = loc.protocol + '//' + loc.hostname + (loc.port ? ':' + loc.port: '');
+	  for (; j < m0; ++j) {
+	    merges[j] = groups0[j];
 	  }
 
-	  _detected.host = origin + loc.pathname;
-
+	  return new Transition(merges, this._parents, this._name, this._id);
+	}
 
-	  return _detected;
+	function start(name) {
+	  return (name + "").trim().split(/^|\s+/).every(function (t) {
+	    var i = t.indexOf(".");
+	    if (i >= 0) t = t.slice(0, i);
+	    return !t || t === "start";
+	  });
 	}
 
-	var aesJs = createCommonjsModule(function (module, exports) {
-	/*! MIT License. Copyright 2015-2018 Richard Moore <me@ricmoo.com>. See LICENSE.txt. */
-	(function(root) {
+	function onFunction(id, name, listener) {
+	  var on0,
+	      on1,
+	      sit = start(name) ? init : set;
+	  return function () {
+	    var schedule = sit(this, id),
+	        on = schedule.on; // If this node shared a dispatch with the previous node,
+	    // just assign the updated shared dispatch and we’re done!
+	    // Otherwise, copy-on-write.
 
-	    function checkInt(value) {
-	        return (parseInt(value) === value);
-	    }
+	    if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
+	    schedule.on = on1;
+	  };
+	}
 
-	    function checkInts(arrayish) {
-	        if (!checkInt(arrayish.length)) { return false; }
+	function transition_on (name, listener) {
+	  var id = this._id;
+	  return arguments.length < 2 ? get$1(this.node(), id).on.on(name) : this.each(onFunction(id, name, listener));
+	}
 
-	        for (var i = 0; i < arrayish.length; i++) {
-	            if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
-	                return false;
-	            }
-	        }
+	function removeFunction(id) {
+	  return function () {
+	    var parent = this.parentNode;
 
-	        return true;
+	    for (var i in this.__transition) {
+	      if (+i !== id) return;
 	    }
 
-	    function coerceArray(arg, copy) {
+	    if (parent) parent.removeChild(this);
+	  };
+	}
 
-	        // ArrayBuffer view
-	        if (arg.buffer && arg.name === 'Uint8Array') {
+	function transition_remove () {
+	  return this.on("end.remove", removeFunction(this._id));
+	}
 
-	            if (copy) {
-	                if (arg.slice) {
-	                    arg = arg.slice();
-	                } else {
-	                    arg = Array.prototype.slice.call(arg);
-	                }
-	            }
+	function transition_select (select) {
+	  var name = this._name,
+	      id = this._id;
+	  if (typeof select !== "function") select = selector(select);
 
-	            return arg;
-	        }
+	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+	      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+	        if ("__data__" in node) subnode.__data__ = node.__data__;
+	        subgroup[i] = subnode;
+	        schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));
+	      }
+	    }
+	  }
 
-	        // It's an array; check it is a valid representation of a byte
-	        if (Array.isArray(arg)) {
-	            if (!checkInts(arg)) {
-	                throw new Error('Array contains invalid value: ' + arg);
-	            }
+	  return new Transition(subgroups, this._parents, name, id);
+	}
 
-	            return new Uint8Array(arg);
-	        }
+	function transition_selectAll (select) {
+	  var name = this._name,
+	      id = this._id;
+	  if (typeof select !== "function") select = selectorAll(select);
 
-	        // Something else, but behaves like an array (maybe a Buffer? Arguments?)
-	        if (checkInt(arg.length) && checkInts(arg)) {
-	            return new Uint8Array(arg);
+	  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+	      if (node = group[i]) {
+	        for (var children = select.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
+	          if (child = children[k]) {
+	            schedule(child, name, id, k, children, inherit);
+	          }
 	        }
 
-	        throw new Error('unsupported array-like object');
-	    }
-
-	    function createArray(length) {
-	        return new Uint8Array(length);
-	    }
-
-	    function copyArray(sourceArray, targetArray, targetStart, sourceStart, sourceEnd) {
-	        if (sourceStart != null || sourceEnd != null) {
-	            if (sourceArray.slice) {
-	                sourceArray = sourceArray.slice(sourceStart, sourceEnd);
-	            } else {
-	                sourceArray = Array.prototype.slice.call(sourceArray, sourceStart, sourceEnd);
-	            }
-	        }
-	        targetArray.set(sourceArray, targetStart);
+	        subgroups.push(children);
+	        parents.push(node);
+	      }
 	    }
+	  }
 
+	  return new Transition(subgroups, parents, name, id);
+	}
 
+	var Selection = selection.prototype.constructor;
+	function transition_selection () {
+	  return new Selection(this._groups, this._parents);
+	}
 
-	    var convertUtf8 = (function() {
-	        function toBytes(text) {
-	            var result = [], i = 0;
-	            text = encodeURI(text);
-	            while (i < text.length) {
-	                var c = text.charCodeAt(i++);
-
-	                // if it is a % sign, encode the following 2 bytes as a hex value
-	                if (c === 37) {
-	                    result.push(parseInt(text.substr(i, 2), 16));
-	                    i += 2;
-
-	                // otherwise, just the actual byte
-	                } else {
-	                    result.push(c);
-	                }
-	            }
+	function styleNull(name, interpolate) {
+	  var string00, string10, interpolate0;
+	  return function () {
+	    var string0 = styleValue(this, name),
+	        string1 = (this.style.removeProperty(name), styleValue(this, name));
+	    return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : interpolate0 = interpolate(string00 = string0, string10 = string1);
+	  };
+	}
 
-	            return coerceArray(result);
-	        }
+	function styleRemove(name) {
+	  return function () {
+	    this.style.removeProperty(name);
+	  };
+	}
 
-	        function fromBytes(bytes) {
-	            var result = [], i = 0;
+	function styleConstant(name, interpolate, value1) {
+	  var string00,
+	      string1 = value1 + "",
+	      interpolate0;
+	  return function () {
+	    var string0 = styleValue(this, name);
+	    return string0 === string1 ? null : string0 === string00 ? interpolate0 : interpolate0 = interpolate(string00 = string0, value1);
+	  };
+	}
 
-	            while (i < bytes.length) {
-	                var c = bytes[i];
+	function styleFunction(name, interpolate, value) {
+	  var string00, string10, interpolate0;
+	  return function () {
+	    var string0 = styleValue(this, name),
+	        value1 = value(this),
+	        string1 = value1 + "";
+	    if (value1 == null) string1 = value1 = (this.style.removeProperty(name), styleValue(this, name));
+	    return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+	  };
+	}
 
-	                if (c < 128) {
-	                    result.push(String.fromCharCode(c));
-	                    i++;
-	                } else if (c > 191 && c < 224) {
-	                    result.push(String.fromCharCode(((c & 0x1f) << 6) | (bytes[i + 1] & 0x3f)));
-	                    i += 2;
-	                } else {
-	                    result.push(String.fromCharCode(((c & 0x0f) << 12) | ((bytes[i + 1] & 0x3f) << 6) | (bytes[i + 2] & 0x3f)));
-	                    i += 3;
-	                }
-	            }
+	function styleMaybeRemove(id, name) {
+	  var on0,
+	      on1,
+	      listener0,
+	      key = "style." + name,
+	      event = "end." + key,
+	      remove;
+	  return function () {
+	    var schedule = set(this, id),
+	        on = schedule.on,
+	        listener = schedule.value[key] == null ? remove || (remove = styleRemove(name)) : undefined; // If this node shared a dispatch with the previous node,
+	    // just assign the updated shared dispatch and we’re done!
+	    // Otherwise, copy-on-write.
 
-	            return result.join('');
-	        }
+	    if (on !== on0 || listener0 !== listener) (on1 = (on0 = on).copy()).on(event, listener0 = listener);
+	    schedule.on = on1;
+	  };
+	}
 
-	        return {
-	            toBytes: toBytes,
-	            fromBytes: fromBytes,
-	        }
-	    })();
+	function transition_style (name, value, priority) {
+	  var i = (name += "") === "transform" ? interpolateTransformCss : interpolate;
+	  return value == null ? this.styleTween(name, styleNull(name, i)).on("end.style." + name, styleRemove(name)) : typeof value === "function" ? this.styleTween(name, styleFunction(name, i, tweenValue(this, "style." + name, value))).each(styleMaybeRemove(this._id, name)) : this.styleTween(name, styleConstant(name, i, value), priority).on("end.style." + name, null);
+	}
 
-	    var convertHex = (function() {
-	        function toBytes(text) {
-	            var result = [];
-	            for (var i = 0; i < text.length; i += 2) {
-	                result.push(parseInt(text.substr(i, 2), 16));
-	            }
+	function styleInterpolate(name, i, priority) {
+	  return function (t) {
+	    this.style.setProperty(name, i.call(this, t), priority);
+	  };
+	}
 
-	            return result;
-	        }
+	function styleTween(name, value, priority) {
+	  var t, i0;
 
-	        // http://ixti.net/development/javascript/2011/11/11/base64-encodedecode-of-utf8-in-browser-with-js.html
-	        var Hex = '0123456789abcdef';
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t = (i0 = i) && styleInterpolate(name, i, priority);
+	    return t;
+	  }
 
-	        function fromBytes(bytes) {
-	                var result = [];
-	                for (var i = 0; i < bytes.length; i++) {
-	                    var v = bytes[i];
-	                    result.push(Hex[(v & 0xf0) >> 4] + Hex[v & 0x0f]);
-	                }
-	                return result.join('');
-	        }
+	  tween._value = value;
+	  return tween;
+	}
 
-	        return {
-	            toBytes: toBytes,
-	            fromBytes: fromBytes,
-	        }
-	    })();
+	function transition_styleTween (name, value, priority) {
+	  var key = "style." + (name += "");
+	  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+	  if (value == null) return this.tween(key, null);
+	  if (typeof value !== "function") throw new Error();
+	  return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
+	}
 
+	function textConstant(value) {
+	  return function () {
+	    this.textContent = value;
+	  };
+	}
 
-	    // Number of rounds by keysize
-	    var numberOfRounds = {16: 10, 24: 12, 32: 14};
+	function textFunction(value) {
+	  return function () {
+	    var value1 = value(this);
+	    this.textContent = value1 == null ? "" : value1;
+	  };
+	}
 
-	    // Round constant words
-	    var rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91];
+	function transition_text (value) {
+	  return this.tween("text", typeof value === "function" ? textFunction(tweenValue(this, "text", value)) : textConstant(value == null ? "" : value + ""));
+	}
 
-	    // S-box and Inverse S-box (S is for Substitution)
-	    var S = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16];
-	    var Si =[0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d];
+	function textInterpolate(i) {
+	  return function (t) {
+	    this.textContent = i.call(this, t);
+	  };
+	}
 
-	    // Transformations for encryption
-	    var T1 = [0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554, 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d, 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b, 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b, 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a, 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f, 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5, 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d, 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb, 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497, 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c, 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a, 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594, 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81, 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504, 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d, 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f, 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395, 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883, 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c, 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4, 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b, 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7, 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818, 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651, 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21, 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12, 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9, 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133, 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a, 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8, 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11, 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a];
-	    var T2 = [0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, 0x0dfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5, 0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b, 0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676, 0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d, 0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0, 0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, 0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0, 0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626, 0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc, 0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x08f9f1f1, 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515, 0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, 0x28301818, 0xa1379696, 0x0f0a0505, 0xb52f9a9a, 0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2, 0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575, 0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a, 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0, 0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, 0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484, 0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded, 0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b, 0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939, 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf, 0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, 0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585, 0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f, 0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8, 0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f, 0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5, 0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, 0x30201010, 0x1ae5ffff, 0x0efdf3f3, 0x6dbfd2d2, 0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec, 0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717, 0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d, 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373, 0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, 0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888, 0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414, 0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb, 0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a, 0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c, 0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, 0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979, 0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d, 0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9, 0xb4d86c6c, 0xfaac5656, 0x07f3f4f4, 0x25cfeaea, 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808, 0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, 0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6, 0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f, 0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a, 0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666, 0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e, 0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, 0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e, 0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111, 0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494, 0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9, 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf, 0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, 0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868, 0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f, 0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616];
-	    var T3 = [0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, 0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5, 0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b, 0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76, 0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d, 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0, 0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, 0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0, 0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26, 0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc, 0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1, 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15, 0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, 0x18283018, 0x96a13796, 0x050f0a05, 0x9ab52f9a, 0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2, 0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75, 0x091b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a, 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0, 0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, 0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384, 0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed, 0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b, 0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239, 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf, 0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, 0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185, 0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f, 0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8, 0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f, 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5, 0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, 0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2, 0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec, 0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17, 0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d, 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673, 0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, 0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88, 0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814, 0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb, 0xe03bdbe0, 0x32566432, 0x3a4e743a, 0x0a1e140a, 0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c, 0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, 0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279, 0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d, 0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9, 0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea, 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008, 0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, 0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6, 0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f, 0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a, 0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66, 0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e, 0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, 0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e, 0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211, 0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394, 0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9, 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df, 0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d, 0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068, 0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f, 0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16];
-	    var T4 = [0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, 0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491, 0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56, 0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec, 0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa, 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb, 0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, 0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b, 0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c, 0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83, 0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9, 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a, 0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, 0x18182830, 0x9696a137, 0x05050f0a, 0x9a9ab52f, 0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf, 0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea, 0x09091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34, 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b, 0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, 0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713, 0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1, 0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6, 0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72, 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85, 0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, 0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411, 0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe, 0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b, 0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05, 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1, 0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, 0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf, 0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3, 0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e, 0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a, 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6, 0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, 0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b, 0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28, 0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad, 0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0x0a0a1e14, 0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8, 0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, 0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2, 0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da, 0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049, 0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf, 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810, 0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, 0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197, 0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e, 0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f, 0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc, 0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c, 0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, 0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927, 0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322, 0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733, 0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9, 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5, 0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a, 0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0, 0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e, 0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c];
+	function textTween(value) {
+	  var t0, i0;
 
-	    // Transformations for decryption
-	    var T5 = [0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393, 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6, 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844, 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94, 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a, 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c, 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a, 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051, 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff, 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb, 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e, 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927, 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, 0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16, 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8, 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120, 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0, 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4, 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5, 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6, 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0, 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f, 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713, 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86, 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541, 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190, 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742];
-	    var T6 = [0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303, 0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3, 0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, 0x02c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9, 0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8, 0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a, 0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b, 0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab, 0x07b2eb28, 0x032fb5c2, 0x9a86c57b, 0xa5d33708, 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682, 0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe, 0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, 0x390b83ec, 0xaa4060ef, 0x065e719f, 0x51bd6e10, 0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, 0xb591548d, 0x0571c45d, 0x6f0406d4, 0xff605015, 0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee, 0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x00000000, 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72, 0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e, 0xb10c0a67, 0x0f9357e7, 0xd2b4ee96, 0x9e1b9b91, 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a, 0x0ae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, 0x0b0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9, 0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e, 0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611, 0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3, 0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390, 0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf, 0xe42c3a9d, 0x0d507892, 0x9b6a5fcc, 0x62547e46, 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af, 0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb, 0x09cd2678, 0xf46e5918, 0x01ec9ab7, 0xa8834f9a, 0x65e6956e, 0x7eaaffe6, 0x0821bccf, 0xe6ef15e8, 0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266, 0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, 0x4af10498, 0xf741ecda, 0x0e7fcd50, 0x2f1791f6, 0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551, 0x049d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647, 0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1, 0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db, 0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, 0x72161dc3, 0x0cbce225, 0x8b283c49, 0x41ff0d95, 0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857];
-	    var T7 = [0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x03934be3, 0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562, 0x5a49deb1, 0x1b6725ba, 0x0e9845ea, 0xc0e15dfe, 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3, 0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9, 0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce, 0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908, 0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, 0xd323ab73, 0x02e2724b, 0x8f57e31f, 0xab2a6655, 0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x08a5d337, 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16, 0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6, 0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e, 0x8af93e21, 0x063d96dd, 0x05aedd3e, 0xbd464de6, 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050, 0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8, 0x0a47a17c, 0x0fe97c42, 0x1ec9f884, 0x00000000, 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a, 0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436, 0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12, 0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, 0x0d0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e, 0x198557f1, 0x074caf75, 0xddbbee99, 0x60fda37f, 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb, 0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, 0xdccad731, 0x85104263, 0x22401397, 0x112084c6, 0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1, 0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233, 0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0x0b3698d4, 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad, 0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3, 0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b, 0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15, 0x9bd9bae7, 0x36ce4a6f, 0x09d4ea9f, 0x7cd629b0, 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2, 0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791, 0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x04dfe496, 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665, 0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6, 0x618c9ad7, 0x0c7a37a1, 0x148e59f8, 0x3c89eb13, 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47, 0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844, 0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d, 0x017139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8];
-	    var T8 = [0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b, 0x30fa5520, 0x766df6ad, 0xcc769188, 0x024c25f5, 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5, 0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b, 0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e, 0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d, 0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x082b94f9, 0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66, 0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, 0x2887f230, 0xbfa5b223, 0x036aba02, 0x16825ced, 0xcf1c2b8a, 0x79b492a7, 0x07f2f0f3, 0x69e2a14e, 0xdaf4cd65, 0x05bed506, 0x34621fd1, 0xa6fe8ac4, 0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd, 0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, 0x548db591, 0xc45d0571, 0x06d46f04, 0x5015ff60, 0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79, 0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x00000000, 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c, 0x0efffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, 0x0fd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24, 0x0a67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c, 0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, 0x090d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814, 0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, 0x01269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b, 0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084, 0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077, 0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22, 0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f, 0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582, 0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb, 0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef, 0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035, 0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, 0x04984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17, 0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46, 0x5eea049d, 0x8c355d01, 0x877473fa, 0x0b412efb, 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d, 0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a, 0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678, 0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0x0d9541ff, 0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0];
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t0 = (i0 = i) && textInterpolate(i);
+	    return t0;
+	  }
 
-	    // Transformations for decryption key expansion
-	    var U1 = [0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3];
-	    var U2 = [0x00000000, 0x0b0e090d, 0x161c121a, 0x1d121b17, 0x2c382434, 0x27362d39, 0x3a24362e, 0x312a3f23, 0x58704868, 0x537e4165, 0x4e6c5a72, 0x4562537f, 0x74486c5c, 0x7f466551, 0x62547e46, 0x695a774b, 0xb0e090d0, 0xbbee99dd, 0xa6fc82ca, 0xadf28bc7, 0x9cd8b4e4, 0x97d6bde9, 0x8ac4a6fe, 0x81caaff3, 0xe890d8b8, 0xe39ed1b5, 0xfe8ccaa2, 0xf582c3af, 0xc4a8fc8c, 0xcfa6f581, 0xd2b4ee96, 0xd9bae79b, 0x7bdb3bbb, 0x70d532b6, 0x6dc729a1, 0x66c920ac, 0x57e31f8f, 0x5ced1682, 0x41ff0d95, 0x4af10498, 0x23ab73d3, 0x28a57ade, 0x35b761c9, 0x3eb968c4, 0x0f9357e7, 0x049d5eea, 0x198f45fd, 0x12814cf0, 0xcb3bab6b, 0xc035a266, 0xdd27b971, 0xd629b07c, 0xe7038f5f, 0xec0d8652, 0xf11f9d45, 0xfa119448, 0x934be303, 0x9845ea0e, 0x8557f119, 0x8e59f814, 0xbf73c737, 0xb47dce3a, 0xa96fd52d, 0xa261dc20, 0xf6ad766d, 0xfda37f60, 0xe0b16477, 0xebbf6d7a, 0xda955259, 0xd19b5b54, 0xcc894043, 0xc787494e, 0xaedd3e05, 0xa5d33708, 0xb8c12c1f, 0xb3cf2512, 0x82e51a31, 0x89eb133c, 0x94f9082b, 0x9ff70126, 0x464de6bd, 0x4d43efb0, 0x5051f4a7, 0x5b5ffdaa, 0x6a75c289, 0x617bcb84, 0x7c69d093, 0x7767d99e, 0x1e3daed5, 0x1533a7d8, 0x0821bccf, 0x032fb5c2, 0x32058ae1, 0x390b83ec, 0x241998fb, 0x2f1791f6, 0x8d764dd6, 0x867844db, 0x9b6a5fcc, 0x906456c1, 0xa14e69e2, 0xaa4060ef, 0xb7527bf8, 0xbc5c72f5, 0xd50605be, 0xde080cb3, 0xc31a17a4, 0xc8141ea9, 0xf93e218a, 0xf2302887, 0xef223390, 0xe42c3a9d, 0x3d96dd06, 0x3698d40b, 0x2b8acf1c, 0x2084c611, 0x11aef932, 0x1aa0f03f, 0x07b2eb28, 0x0cbce225, 0x65e6956e, 0x6ee89c63, 0x73fa8774, 0x78f48e79, 0x49deb15a, 0x42d0b857, 0x5fc2a340, 0x54ccaa4d, 0xf741ecda, 0xfc4fe5d7, 0xe15dfec0, 0xea53f7cd, 0xdb79c8ee, 0xd077c1e3, 0xcd65daf4, 0xc66bd3f9, 0xaf31a4b2, 0xa43fadbf, 0xb92db6a8, 0xb223bfa5, 0x83098086, 0x8807898b, 0x9515929c, 0x9e1b9b91, 0x47a17c0a, 0x4caf7507, 0x51bd6e10, 0x5ab3671d, 0x6b99583e, 0x60975133, 0x7d854a24, 0x768b4329, 0x1fd13462, 0x14df3d6f, 0x09cd2678, 0x02c32f75, 0x33e91056, 0x38e7195b, 0x25f5024c, 0x2efb0b41, 0x8c9ad761, 0x8794de6c, 0x9a86c57b, 0x9188cc76, 0xa0a2f355, 0xabacfa58, 0xb6bee14f, 0xbdb0e842, 0xd4ea9f09, 0xdfe49604, 0xc2f68d13, 0xc9f8841e, 0xf8d2bb3d, 0xf3dcb230, 0xeecea927, 0xe5c0a02a, 0x3c7a47b1, 0x37744ebc, 0x2a6655ab, 0x21685ca6, 0x10426385, 0x1b4c6a88, 0x065e719f, 0x0d507892, 0x640a0fd9, 0x6f0406d4, 0x72161dc3, 0x791814ce, 0x48322bed, 0x433c22e0, 0x5e2e39f7, 0x552030fa, 0x01ec9ab7, 0x0ae293ba, 0x17f088ad, 0x1cfe81a0, 0x2dd4be83, 0x26dab78e, 0x3bc8ac99, 0x30c6a594, 0x599cd2df, 0x5292dbd2, 0x4f80c0c5, 0x448ec9c8, 0x75a4f6eb, 0x7eaaffe6, 0x63b8e4f1, 0x68b6edfc, 0xb10c0a67, 0xba02036a, 0xa710187d, 0xac1e1170, 0x9d342e53, 0x963a275e, 0x8b283c49, 0x80263544, 0xe97c420f, 0xe2724b02, 0xff605015, 0xf46e5918, 0xc544663b, 0xce4a6f36, 0xd3587421, 0xd8567d2c, 0x7a37a10c, 0x7139a801, 0x6c2bb316, 0x6725ba1b, 0x560f8538, 0x5d018c35, 0x40139722, 0x4b1d9e2f, 0x2247e964, 0x2949e069, 0x345bfb7e, 0x3f55f273, 0x0e7fcd50, 0x0571c45d, 0x1863df4a, 0x136dd647, 0xcad731dc, 0xc1d938d1, 0xdccb23c6, 0xd7c52acb, 0xe6ef15e8, 0xede11ce5, 0xf0f307f2, 0xfbfd0eff, 0x92a779b4, 0x99a970b9, 0x84bb6bae, 0x8fb562a3, 0xbe9f5d80, 0xb591548d, 0xa8834f9a, 0xa38d4697];
-	    var U3 = [0x00000000, 0x0d0b0e09, 0x1a161c12, 0x171d121b, 0x342c3824, 0x3927362d, 0x2e3a2436, 0x23312a3f, 0x68587048, 0x65537e41, 0x724e6c5a, 0x7f456253, 0x5c74486c, 0x517f4665, 0x4662547e, 0x4b695a77, 0xd0b0e090, 0xddbbee99, 0xcaa6fc82, 0xc7adf28b, 0xe49cd8b4, 0xe997d6bd, 0xfe8ac4a6, 0xf381caaf, 0xb8e890d8, 0xb5e39ed1, 0xa2fe8cca, 0xaff582c3, 0x8cc4a8fc, 0x81cfa6f5, 0x96d2b4ee, 0x9bd9bae7, 0xbb7bdb3b, 0xb670d532, 0xa16dc729, 0xac66c920, 0x8f57e31f, 0x825ced16, 0x9541ff0d, 0x984af104, 0xd323ab73, 0xde28a57a, 0xc935b761, 0xc43eb968, 0xe70f9357, 0xea049d5e, 0xfd198f45, 0xf012814c, 0x6bcb3bab, 0x66c035a2, 0x71dd27b9, 0x7cd629b0, 0x5fe7038f, 0x52ec0d86, 0x45f11f9d, 0x48fa1194, 0x03934be3, 0x0e9845ea, 0x198557f1, 0x148e59f8, 0x37bf73c7, 0x3ab47dce, 0x2da96fd5, 0x20a261dc, 0x6df6ad76, 0x60fda37f, 0x77e0b164, 0x7aebbf6d, 0x59da9552, 0x54d19b5b, 0x43cc8940, 0x4ec78749, 0x05aedd3e, 0x08a5d337, 0x1fb8c12c, 0x12b3cf25, 0x3182e51a, 0x3c89eb13, 0x2b94f908, 0x269ff701, 0xbd464de6, 0xb04d43ef, 0xa75051f4, 0xaa5b5ffd, 0x896a75c2, 0x84617bcb, 0x937c69d0, 0x9e7767d9, 0xd51e3dae, 0xd81533a7, 0xcf0821bc, 0xc2032fb5, 0xe132058a, 0xec390b83, 0xfb241998, 0xf62f1791, 0xd68d764d, 0xdb867844, 0xcc9b6a5f, 0xc1906456, 0xe2a14e69, 0xefaa4060, 0xf8b7527b, 0xf5bc5c72, 0xbed50605, 0xb3de080c, 0xa4c31a17, 0xa9c8141e, 0x8af93e21, 0x87f23028, 0x90ef2233, 0x9de42c3a, 0x063d96dd, 0x0b3698d4, 0x1c2b8acf, 0x112084c6, 0x3211aef9, 0x3f1aa0f0, 0x2807b2eb, 0x250cbce2, 0x6e65e695, 0x636ee89c, 0x7473fa87, 0x7978f48e, 0x5a49deb1, 0x5742d0b8, 0x405fc2a3, 0x4d54ccaa, 0xdaf741ec, 0xd7fc4fe5, 0xc0e15dfe, 0xcdea53f7, 0xeedb79c8, 0xe3d077c1, 0xf4cd65da, 0xf9c66bd3, 0xb2af31a4, 0xbfa43fad, 0xa8b92db6, 0xa5b223bf, 0x86830980, 0x8b880789, 0x9c951592, 0x919e1b9b, 0x0a47a17c, 0x074caf75, 0x1051bd6e, 0x1d5ab367, 0x3e6b9958, 0x33609751, 0x247d854a, 0x29768b43, 0x621fd134, 0x6f14df3d, 0x7809cd26, 0x7502c32f, 0x5633e910, 0x5b38e719, 0x4c25f502, 0x412efb0b, 0x618c9ad7, 0x6c8794de, 0x7b9a86c5, 0x769188cc, 0x55a0a2f3, 0x58abacfa, 0x4fb6bee1, 0x42bdb0e8, 0x09d4ea9f, 0x04dfe496, 0x13c2f68d, 0x1ec9f884, 0x3df8d2bb, 0x30f3dcb2, 0x27eecea9, 0x2ae5c0a0, 0xb13c7a47, 0xbc37744e, 0xab2a6655, 0xa621685c, 0x85104263, 0x881b4c6a, 0x9f065e71, 0x920d5078, 0xd9640a0f, 0xd46f0406, 0xc372161d, 0xce791814, 0xed48322b, 0xe0433c22, 0xf75e2e39, 0xfa552030, 0xb701ec9a, 0xba0ae293, 0xad17f088, 0xa01cfe81, 0x832dd4be, 0x8e26dab7, 0x993bc8ac, 0x9430c6a5, 0xdf599cd2, 0xd25292db, 0xc54f80c0, 0xc8448ec9, 0xeb75a4f6, 0xe67eaaff, 0xf163b8e4, 0xfc68b6ed, 0x67b10c0a, 0x6aba0203, 0x7da71018, 0x70ac1e11, 0x539d342e, 0x5e963a27, 0x498b283c, 0x44802635, 0x0fe97c42, 0x02e2724b, 0x15ff6050, 0x18f46e59, 0x3bc54466, 0x36ce4a6f, 0x21d35874, 0x2cd8567d, 0x0c7a37a1, 0x017139a8, 0x166c2bb3, 0x1b6725ba, 0x38560f85, 0x355d018c, 0x22401397, 0x2f4b1d9e, 0x642247e9, 0x692949e0, 0x7e345bfb, 0x733f55f2, 0x500e7fcd, 0x5d0571c4, 0x4a1863df, 0x47136dd6, 0xdccad731, 0xd1c1d938, 0xc6dccb23, 0xcbd7c52a, 0xe8e6ef15, 0xe5ede11c, 0xf2f0f307, 0xfffbfd0e, 0xb492a779, 0xb999a970, 0xae84bb6b, 0xa38fb562, 0x80be9f5d, 0x8db59154, 0x9aa8834f, 0x97a38d46];
-	    var U4 = [0x00000000, 0x090d0b0e, 0x121a161c, 0x1b171d12, 0x24342c38, 0x2d392736, 0x362e3a24, 0x3f23312a, 0x48685870, 0x4165537e, 0x5a724e6c, 0x537f4562, 0x6c5c7448, 0x65517f46, 0x7e466254, 0x774b695a, 0x90d0b0e0, 0x99ddbbee, 0x82caa6fc, 0x8bc7adf2, 0xb4e49cd8, 0xbde997d6, 0xa6fe8ac4, 0xaff381ca, 0xd8b8e890, 0xd1b5e39e, 0xcaa2fe8c, 0xc3aff582, 0xfc8cc4a8, 0xf581cfa6, 0xee96d2b4, 0xe79bd9ba, 0x3bbb7bdb, 0x32b670d5, 0x29a16dc7, 0x20ac66c9, 0x1f8f57e3, 0x16825ced, 0x0d9541ff, 0x04984af1, 0x73d323ab, 0x7ade28a5, 0x61c935b7, 0x68c43eb9, 0x57e70f93, 0x5eea049d, 0x45fd198f, 0x4cf01281, 0xab6bcb3b, 0xa266c035, 0xb971dd27, 0xb07cd629, 0x8f5fe703, 0x8652ec0d, 0x9d45f11f, 0x9448fa11, 0xe303934b, 0xea0e9845, 0xf1198557, 0xf8148e59, 0xc737bf73, 0xce3ab47d, 0xd52da96f, 0xdc20a261, 0x766df6ad, 0x7f60fda3, 0x6477e0b1, 0x6d7aebbf, 0x5259da95, 0x5b54d19b, 0x4043cc89, 0x494ec787, 0x3e05aedd, 0x3708a5d3, 0x2c1fb8c1, 0x2512b3cf, 0x1a3182e5, 0x133c89eb, 0x082b94f9, 0x01269ff7, 0xe6bd464d, 0xefb04d43, 0xf4a75051, 0xfdaa5b5f, 0xc2896a75, 0xcb84617b, 0xd0937c69, 0xd99e7767, 0xaed51e3d, 0xa7d81533, 0xbccf0821, 0xb5c2032f, 0x8ae13205, 0x83ec390b, 0x98fb2419, 0x91f62f17, 0x4dd68d76, 0x44db8678, 0x5fcc9b6a, 0x56c19064, 0x69e2a14e, 0x60efaa40, 0x7bf8b752, 0x72f5bc5c, 0x05bed506, 0x0cb3de08, 0x17a4c31a, 0x1ea9c814, 0x218af93e, 0x2887f230, 0x3390ef22, 0x3a9de42c, 0xdd063d96, 0xd40b3698, 0xcf1c2b8a, 0xc6112084, 0xf93211ae, 0xf03f1aa0, 0xeb2807b2, 0xe2250cbc, 0x956e65e6, 0x9c636ee8, 0x877473fa, 0x8e7978f4, 0xb15a49de, 0xb85742d0, 0xa3405fc2, 0xaa4d54cc, 0xecdaf741, 0xe5d7fc4f, 0xfec0e15d, 0xf7cdea53, 0xc8eedb79, 0xc1e3d077, 0xdaf4cd65, 0xd3f9c66b, 0xa4b2af31, 0xadbfa43f, 0xb6a8b92d, 0xbfa5b223, 0x80868309, 0x898b8807, 0x929c9515, 0x9b919e1b, 0x7c0a47a1, 0x75074caf, 0x6e1051bd, 0x671d5ab3, 0x583e6b99, 0x51336097, 0x4a247d85, 0x4329768b, 0x34621fd1, 0x3d6f14df, 0x267809cd, 0x2f7502c3, 0x105633e9, 0x195b38e7, 0x024c25f5, 0x0b412efb, 0xd7618c9a, 0xde6c8794, 0xc57b9a86, 0xcc769188, 0xf355a0a2, 0xfa58abac, 0xe14fb6be, 0xe842bdb0, 0x9f09d4ea, 0x9604dfe4, 0x8d13c2f6, 0x841ec9f8, 0xbb3df8d2, 0xb230f3dc, 0xa927eece, 0xa02ae5c0, 0x47b13c7a, 0x4ebc3774, 0x55ab2a66, 0x5ca62168, 0x63851042, 0x6a881b4c, 0x719f065e, 0x78920d50, 0x0fd9640a, 0x06d46f04, 0x1dc37216, 0x14ce7918, 0x2bed4832, 0x22e0433c, 0x39f75e2e, 0x30fa5520, 0x9ab701ec, 0x93ba0ae2, 0x88ad17f0, 0x81a01cfe, 0xbe832dd4, 0xb78e26da, 0xac993bc8, 0xa59430c6, 0xd2df599c, 0xdbd25292, 0xc0c54f80, 0xc9c8448e, 0xf6eb75a4, 0xffe67eaa, 0xe4f163b8, 0xedfc68b6, 0x0a67b10c, 0x036aba02, 0x187da710, 0x1170ac1e, 0x2e539d34, 0x275e963a, 0x3c498b28, 0x35448026, 0x420fe97c, 0x4b02e272, 0x5015ff60, 0x5918f46e, 0x663bc544, 0x6f36ce4a, 0x7421d358, 0x7d2cd856, 0xa10c7a37, 0xa8017139, 0xb3166c2b, 0xba1b6725, 0x8538560f, 0x8c355d01, 0x97224013, 0x9e2f4b1d, 0xe9642247, 0xe0692949, 0xfb7e345b, 0xf2733f55, 0xcd500e7f, 0xc45d0571, 0xdf4a1863, 0xd647136d, 0x31dccad7, 0x38d1c1d9, 0x23c6dccb, 0x2acbd7c5, 0x15e8e6ef, 0x1ce5ede1, 0x07f2f0f3, 0x0efffbfd, 0x79b492a7, 0x70b999a9, 0x6bae84bb, 0x62a38fb5, 0x5d80be9f, 0x548db591, 0x4f9aa883, 0x4697a38d];
+	  tween._value = value;
+	  return tween;
+	}
 
-	    function convertToInt32(bytes) {
-	        var result = [];
-	        for (var i = 0; i < bytes.length; i += 4) {
-	            result.push(
-	                (bytes[i    ] << 24) |
-	                (bytes[i + 1] << 16) |
-	                (bytes[i + 2] <<  8) |
-	                 bytes[i + 3]
-	            );
-	        }
-	        return result;
-	    }
+	function transition_textTween (value) {
+	  var key = "text";
+	  if (arguments.length < 1) return (key = this.tween(key)) && key._value;
+	  if (value == null) return this.tween(key, null);
+	  if (typeof value !== "function") throw new Error();
+	  return this.tween(key, textTween(value));
+	}
 
-	    var AES = function(key) {
-	        if (!(this instanceof AES)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
+	function transition_transition () {
+	  var name = this._name,
+	      id0 = this._id,
+	      id1 = newId();
 
-	        Object.defineProperty(this, 'key', {
-	            value: coerceArray(key, true)
+	  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+	      if (node = group[i]) {
+	        var inherit = get$1(node, id0);
+	        schedule(node, name, id1, i, group, {
+	          time: inherit.time + inherit.delay + inherit.duration,
+	          delay: 0,
+	          duration: inherit.duration,
+	          ease: inherit.ease
 	        });
+	      }
+	    }
+	  }
+
+	  return new Transition(groups, this._parents, name, id1);
+	}
 
-	        this._prepare();
+	function transition_end () {
+	  var on0,
+	      on1,
+	      that = this,
+	      id = that._id,
+	      size = that.size();
+	  return new Promise(function (resolve, reject) {
+	    var cancel = {
+	      value: reject
+	    },
+	        end = {
+	      value: function value() {
+	        if (--size === 0) resolve();
+	      }
 	    };
+	    that.each(function () {
+	      var schedule = set(this, id),
+	          on = schedule.on; // If this node shared a dispatch with the previous node,
+	      // just assign the updated shared dispatch and we’re done!
+	      // Otherwise, copy-on-write.
 
+	      if (on !== on0) {
+	        on1 = (on0 = on).copy();
 
-	    AES.prototype._prepare = function() {
+	        on1._.cancel.push(cancel);
 
-	        var rounds = numberOfRounds[this.key.length];
-	        if (rounds == null) {
-	            throw new Error('invalid key size (must be 16, 24 or 32 bytes)');
-	        }
+	        on1._.interrupt.push(cancel);
 
-	        // encryption round keys
-	        this._Ke = [];
+	        on1._.end.push(end);
+	      }
 
-	        // decryption round keys
-	        this._Kd = [];
+	      schedule.on = on1;
+	    }); // The selection was empty, resolve end immediately
 
-	        for (var i = 0; i <= rounds; i++) {
-	            this._Ke.push([0, 0, 0, 0]);
-	            this._Kd.push([0, 0, 0, 0]);
-	        }
+	    if (size === 0) resolve();
+	  });
+	}
 
-	        var roundKeyCount = (rounds + 1) * 4;
-	        var KC = this.key.length / 4;
+	var id = 0;
+	function Transition(groups, parents, name, id) {
+	  this._groups = groups;
+	  this._parents = parents;
+	  this._name = name;
+	  this._id = id;
+	}
+	function newId() {
+	  return ++id;
+	}
+	var selection_prototype = selection.prototype;
+	Transition.prototype = _defineProperty({
+	  constructor: Transition,
+	  select: transition_select,
+	  selectAll: transition_selectAll,
+	  filter: transition_filter,
+	  merge: transition_merge,
+	  selection: transition_selection,
+	  transition: transition_transition,
+	  call: selection_prototype.call,
+	  nodes: selection_prototype.nodes,
+	  node: selection_prototype.node,
+	  size: selection_prototype.size,
+	  empty: selection_prototype.empty,
+	  each: selection_prototype.each,
+	  on: transition_on,
+	  attr: transition_attr,
+	  attrTween: transition_attrTween,
+	  style: transition_style,
+	  styleTween: transition_styleTween,
+	  text: transition_text,
+	  textTween: transition_textTween,
+	  remove: transition_remove,
+	  tween: transition_tween,
+	  delay: transition_delay,
+	  duration: transition_duration,
+	  ease: transition_ease,
+	  easeVarying: transition_easeVarying,
+	  end: transition_end
+	}, Symbol.iterator, selection_prototype[Symbol.iterator]);
 
-	        // convert the key into ints
-	        var tk = convertToInt32(this.key);
+	var linear$1 = function linear(t) {
+	  return +t;
+	};
 
-	        // copy values into round key arrays
-	        var index;
-	        for (var i = 0; i < KC; i++) {
-	            index = i >> 2;
-	            this._Ke[index][i % 4] = tk[i];
-	            this._Kd[rounds - index][i % 4] = tk[i];
-	        }
+	function cubicInOut(t) {
+	  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
+	}
 
-	        // key expansion (fips-197 section 5.2)
-	        var rconpointer = 0;
-	        var t = KC, tt;
-	        while (t < roundKeyCount) {
-	            tt = tk[KC - 1];
-	            tk[0] ^= ((S[(tt >> 16) & 0xFF] << 24) ^
-	                      (S[(tt >>  8) & 0xFF] << 16) ^
-	                      (S[ tt        & 0xFF] <<  8) ^
-	                       S[(tt >> 24) & 0xFF]        ^
-	                      (rcon[rconpointer] << 24));
-	            rconpointer += 1;
+	var defaultTiming = {
+	  time: null,
+	  // Set on use.
+	  delay: 0,
+	  duration: 250,
+	  ease: cubicInOut
+	};
 
-	            // key expansion (for non-256 bit)
-	            if (KC != 8) {
-	                for (var i = 1; i < KC; i++) {
-	                    tk[i] ^= tk[i - 1];
-	                }
+	function inherit(node, id) {
+	  var timing;
 
-	            // key expansion for 256-bit keys is "slightly different" (fips-197)
-	            } else {
-	                for (var i = 1; i < (KC / 2); i++) {
-	                    tk[i] ^= tk[i - 1];
-	                }
-	                tt = tk[(KC / 2) - 1];
+	  while (!(timing = node.__transition) || !(timing = timing[id])) {
+	    if (!(node = node.parentNode)) {
+	      throw new Error("transition ".concat(id, " not found"));
+	    }
+	  }
 
-	                tk[KC / 2] ^= (S[ tt        & 0xFF]        ^
-	                              (S[(tt >>  8) & 0xFF] <<  8) ^
-	                              (S[(tt >> 16) & 0xFF] << 16) ^
-	                              (S[(tt >> 24) & 0xFF] << 24));
+	  return timing;
+	}
 
-	                for (var i = (KC / 2) + 1; i < KC; i++) {
-	                    tk[i] ^= tk[i - 1];
-	                }
-	            }
+	function selection_transition (name) {
+	  var id, timing;
 
-	            // copy values into round key arrays
-	            var i = 0, r, c;
-	            while (i < KC && t < roundKeyCount) {
-	                r = t >> 2;
-	                c = t % 4;
-	                this._Ke[r][c] = tk[i];
-	                this._Kd[rounds - r][c] = tk[i++];
-	                t++;
-	            }
-	        }
+	  if (name instanceof Transition) {
+	    id = name._id, name = name._name;
+	  } else {
+	    id = newId(), (timing = defaultTiming).time = now$1(), name = name == null ? null : name + "";
+	  }
 
-	        // inverse-cipher-ify the decryption round key (fips-197 section 5.3)
-	        for (var r = 1; r < rounds; r++) {
-	            for (var c = 0; c < 4; c++) {
-	                tt = this._Kd[r][c];
-	                this._Kd[r][c] = (U1[(tt >> 24) & 0xFF] ^
-	                                  U2[(tt >> 16) & 0xFF] ^
-	                                  U3[(tt >>  8) & 0xFF] ^
-	                                  U4[ tt        & 0xFF]);
-	            }
-	        }
-	    };
+	  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+	      if (node = group[i]) {
+	        schedule(node, name, id, i, group, timing || inherit(node, id));
+	      }
+	    }
+	  }
 
-	    AES.prototype.encrypt = function(plaintext) {
-	        if (plaintext.length != 16) {
-	            throw new Error('invalid plaintext size (must be 16 bytes)');
-	        }
+	  return new Transition(groups, this._parents, name, id);
+	}
 
-	        var rounds = this._Ke.length - 1;
-	        var a = [0, 0, 0, 0];
+	selection.prototype.interrupt = selection_interrupt;
+	selection.prototype.transition = selection_transition;
 
-	        // convert plaintext to (ints ^ key)
-	        var t = convertToInt32(plaintext);
-	        for (var i = 0; i < 4; i++) {
-	            t[i] ^= this._Ke[0][i];
-	        }
+	var constant = (function (x) {
+	  return function () {
+	    return x;
+	  };
+	});
 
-	        // apply round transforms
-	        for (var r = 1; r < rounds; r++) {
-	            for (var i = 0; i < 4; i++) {
-	                a[i] = (T1[(t[ i         ] >> 24) & 0xff] ^
-	                        T2[(t[(i + 1) % 4] >> 16) & 0xff] ^
-	                        T3[(t[(i + 2) % 4] >>  8) & 0xff] ^
-	                        T4[ t[(i + 3) % 4]        & 0xff] ^
-	                        this._Ke[r][i]);
-	            }
-	            t = a.slice();
-	        }
+	function ZoomEvent(type, _ref) {
+	  var sourceEvent = _ref.sourceEvent,
+	      target = _ref.target,
+	      transform = _ref.transform,
+	      dispatch = _ref.dispatch;
+	  Object.defineProperties(this, {
+	    type: {
+	      value: type,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    sourceEvent: {
+	      value: sourceEvent,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    target: {
+	      value: target,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    transform: {
+	      value: transform,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    _: {
+	      value: dispatch
+	    }
+	  });
+	}
 
-	        // the last round is special
-	        var result = createArray(16), tt;
-	        for (var i = 0; i < 4; i++) {
-	            tt = this._Ke[rounds][i];
-	            result[4 * i    ] = (S[(t[ i         ] >> 24) & 0xff] ^ (tt >> 24)) & 0xff;
-	            result[4 * i + 1] = (S[(t[(i + 1) % 4] >> 16) & 0xff] ^ (tt >> 16)) & 0xff;
-	            result[4 * i + 2] = (S[(t[(i + 2) % 4] >>  8) & 0xff] ^ (tt >>  8)) & 0xff;
-	            result[4 * i + 3] = (S[ t[(i + 3) % 4]        & 0xff] ^  tt       ) & 0xff;
-	        }
+	function Transform(k, x, y) {
+	  this.k = k;
+	  this.x = x;
+	  this.y = y;
+	}
+	Transform.prototype = {
+	  constructor: Transform,
+	  scale: function scale(k) {
+	    return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
+	  },
+	  translate: function translate(x, y) {
+	    return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
+	  },
+	  apply: function apply(point) {
+	    return [point[0] * this.k + this.x, point[1] * this.k + this.y];
+	  },
+	  applyX: function applyX(x) {
+	    return x * this.k + this.x;
+	  },
+	  applyY: function applyY(y) {
+	    return y * this.k + this.y;
+	  },
+	  invert: function invert(location) {
+	    return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
+	  },
+	  invertX: function invertX(x) {
+	    return (x - this.x) / this.k;
+	  },
+	  invertY: function invertY(y) {
+	    return (y - this.y) / this.k;
+	  },
+	  rescaleX: function rescaleX(x) {
+	    return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
+	  },
+	  rescaleY: function rescaleY(y) {
+	    return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
+	  },
+	  toString: function toString() {
+	    return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
+	  }
+	};
+	var identity$2 = new Transform(1, 0, 0);
 
-	        return result;
-	    };
+	function nopropagation(event) {
+	  event.stopImmediatePropagation();
+	}
+	function noevent (event) {
+	  event.preventDefault();
+	  event.stopImmediatePropagation();
+	}
 
-	    AES.prototype.decrypt = function(ciphertext) {
-	        if (ciphertext.length != 16) {
-	            throw new Error('invalid ciphertext size (must be 16 bytes)');
-	        }
+	// except for pinch-to-zoom, which is sent as a wheel+ctrlKey event
 
-	        var rounds = this._Kd.length - 1;
-	        var a = [0, 0, 0, 0];
+	function defaultFilter$1(event) {
+	  return (!event.ctrlKey || event.type === 'wheel') && !event.button;
+	}
 
-	        // convert plaintext to (ints ^ key)
-	        var t = convertToInt32(ciphertext);
-	        for (var i = 0; i < 4; i++) {
-	            t[i] ^= this._Kd[0][i];
-	        }
+	function defaultExtent$1() {
+	  var e = this;
 
-	        // apply round transforms
-	        for (var r = 1; r < rounds; r++) {
-	            for (var i = 0; i < 4; i++) {
-	                a[i] = (T5[(t[ i          ] >> 24) & 0xff] ^
-	                        T6[(t[(i + 3) % 4] >> 16) & 0xff] ^
-	                        T7[(t[(i + 2) % 4] >>  8) & 0xff] ^
-	                        T8[ t[(i + 1) % 4]        & 0xff] ^
-	                        this._Kd[r][i]);
-	            }
-	            t = a.slice();
-	        }
+	  if (e instanceof SVGElement) {
+	    e = e.ownerSVGElement || e;
 
-	        // the last round is special
-	        var result = createArray(16), tt;
-	        for (var i = 0; i < 4; i++) {
-	            tt = this._Kd[rounds][i];
-	            result[4 * i    ] = (Si[(t[ i         ] >> 24) & 0xff] ^ (tt >> 24)) & 0xff;
-	            result[4 * i + 1] = (Si[(t[(i + 3) % 4] >> 16) & 0xff] ^ (tt >> 16)) & 0xff;
-	            result[4 * i + 2] = (Si[(t[(i + 2) % 4] >>  8) & 0xff] ^ (tt >>  8)) & 0xff;
-	            result[4 * i + 3] = (Si[ t[(i + 1) % 4]        & 0xff] ^  tt       ) & 0xff;
-	        }
+	    if (e.hasAttribute("viewBox")) {
+	      e = e.viewBox.baseVal;
+	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+	    }
 
-	        return result;
-	    };
+	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+	  }
 
+	  return [[0, 0], [e.clientWidth, e.clientHeight]];
+	}
 
-	    /**
-	     *  Mode Of Operation - Electonic Codebook (ECB)
-	     */
-	    var ModeOfOperationECB = function(key) {
-	        if (!(this instanceof ModeOfOperationECB)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
+	function defaultTransform() {
+	  return this.__zoom || identity$2;
+	}
 
-	        this.description = "Electronic Code Block";
-	        this.name = "ecb";
+	function defaultWheelDelta$1(event) {
+	  return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002) * (event.ctrlKey ? 10 : 1);
+	}
 
-	        this._aes = new AES(key);
-	    };
+	function defaultTouchable() {
+	  return navigator.maxTouchPoints || "ontouchstart" in this;
+	}
 
-	    ModeOfOperationECB.prototype.encrypt = function(plaintext) {
-	        plaintext = coerceArray(plaintext);
+	function defaultConstrain$1(transform, extent, translateExtent) {
+	  var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
+	      dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
+	      dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
+	      dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
+	  return transform.translate(dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1), dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1));
+	}
 
-	        if ((plaintext.length % 16) !== 0) {
-	            throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
-	        }
+	function d3_zoom () {
+	  var filter = defaultFilter$1,
+	      extent = defaultExtent$1,
+	      constrain = defaultConstrain$1,
+	      wheelDelta = defaultWheelDelta$1,
+	      touchable = defaultTouchable,
+	      scaleExtent = [0, Infinity],
+	      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
+	      duration = 250,
+	      interpolate = interpolateZoom,
+	      listeners = dispatch$8("start", "zoom", "end"),
+	      touchstarting,
+	      touchfirst,
+	      touchending,
+	      touchDelay = 500,
+	      wheelDelay = 150,
+	      clickDistance2 = 0,
+	      tapDistance = 10;
 
-	        var ciphertext = createArray(plaintext.length);
-	        var block = createArray(16);
+	  function zoom(selection) {
+	    selection.property("__zoom", defaultTransform).on("wheel.zoom", wheeled).on("mousedown.zoom", mousedowned).on("dblclick.zoom", dblclicked).filter(touchable).on("touchstart.zoom", touchstarted).on("touchmove.zoom", touchmoved).on("touchend.zoom touchcancel.zoom", touchended).style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+	  }
 
-	        for (var i = 0; i < plaintext.length; i += 16) {
-	            copyArray(plaintext, block, 0, i, i + 16);
-	            block = this._aes.encrypt(block);
-	            copyArray(block, ciphertext, i);
-	        }
+	  zoom.transform = function (collection, transform, point, event) {
+	    var selection = collection.selection ? collection.selection() : collection;
+	    selection.property("__zoom", defaultTransform);
 
-	        return ciphertext;
-	    };
+	    if (collection !== selection) {
+	      schedule(collection, transform, point, event);
+	    } else {
+	      selection.interrupt().each(function () {
+	        gesture(this, arguments).event(event).start().zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform).end();
+	      });
+	    }
+	  };
 
-	    ModeOfOperationECB.prototype.decrypt = function(ciphertext) {
-	        ciphertext = coerceArray(ciphertext);
+	  zoom.scaleBy = function (selection, k, p, event) {
+	    zoom.scaleTo(selection, function () {
+	      var k0 = this.__zoom.k,
+	          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+	      return k0 * k1;
+	    }, p, event);
+	  };
 
-	        if ((ciphertext.length % 16) !== 0) {
-	            throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
-	        }
+	  zoom.scaleTo = function (selection, k, p, event) {
+	    zoom.transform(selection, function () {
+	      var e = extent.apply(this, arguments),
+	          t0 = this.__zoom,
+	          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p,
+	          p1 = t0.invert(p0),
+	          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+	      return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
+	    }, p, event);
+	  };
 
-	        var plaintext = createArray(ciphertext.length);
-	        var block = createArray(16);
+	  zoom.translateBy = function (selection, x, y, event) {
+	    zoom.transform(selection, function () {
+	      return constrain(this.__zoom.translate(typeof x === "function" ? x.apply(this, arguments) : x, typeof y === "function" ? y.apply(this, arguments) : y), extent.apply(this, arguments), translateExtent);
+	    }, null, event);
+	  };
 
-	        for (var i = 0; i < ciphertext.length; i += 16) {
-	            copyArray(ciphertext, block, 0, i, i + 16);
-	            block = this._aes.decrypt(block);
-	            copyArray(block, plaintext, i);
-	        }
+	  zoom.translateTo = function (selection, x, y, p, event) {
+	    zoom.transform(selection, function () {
+	      var e = extent.apply(this, arguments),
+	          t = this.__zoom,
+	          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p;
+	      return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(typeof x === "function" ? -x.apply(this, arguments) : -x, typeof y === "function" ? -y.apply(this, arguments) : -y), e, translateExtent);
+	    }, p, event);
+	  };
 
-	        return plaintext;
-	    };
+	  function scale(transform, k) {
+	    k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
+	    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
+	  }
 
+	  function translate(transform, p0, p1) {
+	    var x = p0[0] - p1[0] * transform.k,
+	        y = p0[1] - p1[1] * transform.k;
+	    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
+	  }
 
-	    /**
-	     *  Mode Of Operation - Cipher Block Chaining (CBC)
-	     */
-	    var ModeOfOperationCBC = function(key, iv) {
-	        if (!(this instanceof ModeOfOperationCBC)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
+	  function centroid(extent) {
+	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+	  }
 
-	        this.description = "Cipher Block Chaining";
-	        this.name = "cbc";
+	  function schedule(transition, transform, point, event) {
+	    transition.on("start.zoom", function () {
+	      gesture(this, arguments).event(event).start();
+	    }).on("interrupt.zoom end.zoom", function () {
+	      gesture(this, arguments).event(event).end();
+	    }).tween("zoom", function () {
+	      var that = this,
+	          args = arguments,
+	          g = gesture(that, args).event(event),
+	          e = extent.apply(that, args),
+	          p = point == null ? centroid(e) : typeof point === "function" ? point.apply(that, args) : point,
+	          w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
+	          a = that.__zoom,
+	          b = typeof transform === "function" ? transform.apply(that, args) : transform,
+	          i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
+	      return function (t) {
+	        if (t === 1) t = b; // Avoid rounding error on end.
+	        else {
+	          var l = i(t),
+	              k = w / l[2];
+	          t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
+	        }
+	        g.zoom(null, t);
+	      };
+	    });
+	  }
 
-	        if (!iv) {
-	            iv = createArray(16);
+	  function gesture(that, args, clean) {
+	    return !clean && that.__zooming || new Gesture(that, args);
+	  }
 
-	        } else if (iv.length != 16) {
-	            throw new Error('invalid initialation vector size (must be 16 bytes)');
-	        }
+	  function Gesture(that, args) {
+	    this.that = that;
+	    this.args = args;
+	    this.active = 0;
+	    this.sourceEvent = null;
+	    this.extent = extent.apply(that, args);
+	    this.taps = 0;
+	  }
 
-	        this._lastCipherblock = coerceArray(iv, true);
+	  Gesture.prototype = {
+	    event: function event(_event) {
+	      if (_event) this.sourceEvent = _event;
+	      return this;
+	    },
+	    start: function start() {
+	      if (++this.active === 1) {
+	        this.that.__zooming = this;
+	        this.emit("start");
+	      }
 
-	        this._aes = new AES(key);
-	    };
+	      return this;
+	    },
+	    zoom: function zoom(key, transform) {
+	      if (this.mouse && key !== "mouse") this.mouse[1] = transform.invert(this.mouse[0]);
+	      if (this.touch0 && key !== "touch") this.touch0[1] = transform.invert(this.touch0[0]);
+	      if (this.touch1 && key !== "touch") this.touch1[1] = transform.invert(this.touch1[0]);
+	      this.that.__zoom = transform;
+	      this.emit("zoom");
+	      return this;
+	    },
+	    end: function end() {
+	      if (--this.active === 0) {
+	        delete this.that.__zooming;
+	        this.emit("end");
+	      }
 
-	    ModeOfOperationCBC.prototype.encrypt = function(plaintext) {
-	        plaintext = coerceArray(plaintext);
+	      return this;
+	    },
+	    emit: function emit(type) {
+	      var d = select(this.that).datum();
+	      listeners.call(type, this.that, new ZoomEvent(type, {
+	        sourceEvent: this.sourceEvent,
+	        target: zoom,
+	        type: type,
+	        transform: this.that.__zoom,
+	        dispatch: listeners
+	      }), d);
+	    }
+	  };
 
-	        if ((plaintext.length % 16) !== 0) {
-	            throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
-	        }
+	  function wheeled(event) {
+	    for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+	      args[_key - 1] = arguments[_key];
+	    }
 
-	        var ciphertext = createArray(plaintext.length);
-	        var block = createArray(16);
+	    if (!filter.apply(this, arguments)) return;
+	    var g = gesture(this, args).event(event),
+	        t = this.__zoom,
+	        k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
+	        p = pointer(event); // If the mouse is in the same location as before, reuse it.
+	    // If there were recent wheel events, reset the wheel idle timeout.
 
-	        for (var i = 0; i < plaintext.length; i += 16) {
-	            copyArray(plaintext, block, 0, i, i + 16);
+	    if (g.wheel) {
+	      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
+	        g.mouse[1] = t.invert(g.mouse[0] = p);
+	      }
 
-	            for (var j = 0; j < 16; j++) {
-	                block[j] ^= this._lastCipherblock[j];
-	            }
+	      clearTimeout(g.wheel);
+	    } // If this wheel event won’t trigger a transform change, ignore it.
+	    else if (t.k === k) return; // Otherwise, capture the mouse point and location at the start.
+	    else {
+	      g.mouse = [p, t.invert(p)];
+	      interrupt(this);
+	      g.start();
+	    }
 
-	            this._lastCipherblock = this._aes.encrypt(block);
-	            copyArray(this._lastCipherblock, ciphertext, i);
-	        }
+	    noevent(event);
+	    g.wheel = setTimeout(wheelidled, wheelDelay);
+	    g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
 
-	        return ciphertext;
-	    };
+	    function wheelidled() {
+	      g.wheel = null;
+	      g.end();
+	    }
+	  }
 
-	    ModeOfOperationCBC.prototype.decrypt = function(ciphertext) {
-	        ciphertext = coerceArray(ciphertext);
+	  function mousedowned(event) {
+	    for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
+	      args[_key2 - 1] = arguments[_key2];
+	    }
 
-	        if ((ciphertext.length % 16) !== 0) {
-	            throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
-	        }
+	    if (touchending || !filter.apply(this, arguments)) return;
+	    var g = gesture(this, args, true).event(event),
+	        v = select(event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
+	        p = pointer(event, currentTarget),
+	        currentTarget = event.currentTarget,
+	        x0 = event.clientX,
+	        y0 = event.clientY;
+	    dragDisable(event.view);
+	    nopropagation(event);
+	    g.mouse = [p, this.__zoom.invert(p)];
+	    interrupt(this);
+	    g.start();
 
-	        var plaintext = createArray(ciphertext.length);
-	        var block = createArray(16);
+	    function mousemoved(event) {
+	      noevent(event);
 
-	        for (var i = 0; i < ciphertext.length; i += 16) {
-	            copyArray(ciphertext, block, 0, i, i + 16);
-	            block = this._aes.decrypt(block);
+	      if (!g.moved) {
+	        var dx = event.clientX - x0,
+	            dy = event.clientY - y0;
+	        g.moved = dx * dx + dy * dy > clickDistance2;
+	      }
 
-	            for (var j = 0; j < 16; j++) {
-	                plaintext[i + j] = block[j] ^ this._lastCipherblock[j];
-	            }
+	      g.event(event).zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = pointer(event, currentTarget), g.mouse[1]), g.extent, translateExtent));
+	    }
 
-	            copyArray(ciphertext, this._lastCipherblock, 0, i, i + 16);
-	        }
+	    function mouseupped(event) {
+	      v.on("mousemove.zoom mouseup.zoom", null);
+	      yesdrag(event.view, g.moved);
+	      noevent(event);
+	      g.event(event).end();
+	    }
+	  }
 
-	        return plaintext;
-	    };
+	  function dblclicked(event) {
+	    for (var _len3 = arguments.length, args = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
+	      args[_key3 - 1] = arguments[_key3];
+	    }
 
+	    if (!filter.apply(this, arguments)) return;
+	    var t0 = this.__zoom,
+	        p0 = pointer(event.changedTouches ? event.changedTouches[0] : event, this),
+	        p1 = t0.invert(p0),
+	        k1 = t0.k * (event.shiftKey ? 0.5 : 2),
+	        t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, args), translateExtent);
+	    noevent(event);
+	    if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0, event);else select(this).call(zoom.transform, t1, p0, event);
+	  }
 
-	    /**
-	     *  Mode Of Operation - Cipher Feedback (CFB)
-	     */
-	    var ModeOfOperationCFB = function(key, iv, segmentSize) {
-	        if (!(this instanceof ModeOfOperationCFB)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
+	  function touchstarted(event) {
+	    for (var _len4 = arguments.length, args = new Array(_len4 > 1 ? _len4 - 1 : 0), _key4 = 1; _key4 < _len4; _key4++) {
+	      args[_key4 - 1] = arguments[_key4];
+	    }
 
-	        this.description = "Cipher Feedback";
-	        this.name = "cfb";
+	    if (!filter.apply(this, arguments)) return;
+	    var touches = event.touches,
+	        n = touches.length,
+	        g = gesture(this, args, event.changedTouches.length === n).event(event),
+	        started,
+	        i,
+	        t,
+	        p;
+	    nopropagation(event);
 
-	        if (!iv) {
-	            iv = createArray(16);
+	    for (i = 0; i < n; ++i) {
+	      t = touches[i], p = pointer(t, this);
+	      p = [p, this.__zoom.invert(p), t.identifier];
+	      if (!g.touch0) g.touch0 = p, started = true, g.taps = 1 + !!touchstarting;else if (!g.touch1 && g.touch0[2] !== p[2]) g.touch1 = p, g.taps = 0;
+	    }
 
-	        } else if (iv.length != 16) {
-	            throw new Error('invalid initialation vector size (must be 16 size)');
-	        }
+	    if (touchstarting) touchstarting = clearTimeout(touchstarting);
 
-	        if (!segmentSize) { segmentSize = 1; }
+	    if (started) {
+	      if (g.taps < 2) touchfirst = p[0], touchstarting = setTimeout(function () {
+	        touchstarting = null;
+	      }, touchDelay);
+	      interrupt(this);
+	      g.start();
+	    }
+	  }
 
-	        this.segmentSize = segmentSize;
+	  function touchmoved(event) {
+	    if (!this.__zooming) return;
 
-	        this._shiftRegister = coerceArray(iv, true);
+	    for (var _len5 = arguments.length, args = new Array(_len5 > 1 ? _len5 - 1 : 0), _key5 = 1; _key5 < _len5; _key5++) {
+	      args[_key5 - 1] = arguments[_key5];
+	    }
 
-	        this._aes = new AES(key);
-	    };
+	    var g = gesture(this, args).event(event),
+	        touches = event.changedTouches,
+	        n = touches.length,
+	        i,
+	        t,
+	        p,
+	        l;
+	    noevent(event);
 
-	    ModeOfOperationCFB.prototype.encrypt = function(plaintext) {
-	        if ((plaintext.length % this.segmentSize) != 0) {
-	            throw new Error('invalid plaintext size (must be segmentSize bytes)');
-	        }
+	    for (i = 0; i < n; ++i) {
+	      t = touches[i], p = pointer(t, this);
+	      if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
+	    }
 
-	        var encrypted = coerceArray(plaintext, true);
+	    t = g.that.__zoom;
 
-	        var xorSegment;
-	        for (var i = 0; i < encrypted.length; i += this.segmentSize) {
-	            xorSegment = this._aes.encrypt(this._shiftRegister);
-	            for (var j = 0; j < this.segmentSize; j++) {
-	                encrypted[i + j] ^= xorSegment[j];
-	            }
+	    if (g.touch1) {
+	      var p0 = g.touch0[0],
+	          l0 = g.touch0[1],
+	          p1 = g.touch1[0],
+	          l1 = g.touch1[1],
+	          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
+	          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
+	      t = scale(t, Math.sqrt(dp / dl));
+	      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
+	      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
+	    } else if (g.touch0) p = g.touch0[0], l = g.touch0[1];else return;
 
-	            // Shift the register
-	            copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
-	            copyArray(encrypted, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
-	        }
+	    g.zoom("touch", constrain(translate(t, p, l), g.extent, translateExtent));
+	  }
 
-	        return encrypted;
-	    };
+	  function touchended(event) {
+	    for (var _len6 = arguments.length, args = new Array(_len6 > 1 ? _len6 - 1 : 0), _key6 = 1; _key6 < _len6; _key6++) {
+	      args[_key6 - 1] = arguments[_key6];
+	    }
 
-	    ModeOfOperationCFB.prototype.decrypt = function(ciphertext) {
-	        if ((ciphertext.length % this.segmentSize) != 0) {
-	            throw new Error('invalid ciphertext size (must be segmentSize bytes)');
-	        }
+	    if (!this.__zooming) return;
+	    var g = gesture(this, args).event(event),
+	        touches = event.changedTouches,
+	        n = touches.length,
+	        i,
+	        t;
+	    nopropagation(event);
+	    if (touchending) clearTimeout(touchending);
+	    touchending = setTimeout(function () {
+	      touchending = null;
+	    }, touchDelay);
 
-	        var plaintext = coerceArray(ciphertext, true);
+	    for (i = 0; i < n; ++i) {
+	      t = touches[i];
+	      if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;
+	    }
 
-	        var xorSegment;
-	        for (var i = 0; i < plaintext.length; i += this.segmentSize) {
-	            xorSegment = this._aes.encrypt(this._shiftRegister);
+	    if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;
+	    if (g.touch0) g.touch0[1] = this.__zoom.invert(g.touch0[0]);else {
+	      g.end(); // If this was a dbltap, reroute to the (optional) dblclick.zoom handler.
 
-	            for (var j = 0; j < this.segmentSize; j++) {
-	                plaintext[i + j] ^= xorSegment[j];
-	            }
+	      if (g.taps === 2) {
+	        t = pointer(t, this);
 
-	            // Shift the register
-	            copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
-	            copyArray(ciphertext, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
+	        if (Math.hypot(touchfirst[0] - t[0], touchfirst[1] - t[1]) < tapDistance) {
+	          var p = select(this).on("dblclick.zoom");
+	          if (p) p.apply(this, arguments);
 	        }
+	      }
+	    }
+	  }
 
-	        return plaintext;
-	    };
+	  zoom.wheelDelta = function (_) {
+	    return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant(+_), zoom) : wheelDelta;
+	  };
 
-	    /**
-	     *  Mode Of Operation - Output Feedback (OFB)
-	     */
-	    var ModeOfOperationOFB = function(key, iv) {
-	        if (!(this instanceof ModeOfOperationOFB)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
+	  zoom.filter = function (_) {
+	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant(!!_), zoom) : filter;
+	  };
 
-	        this.description = "Output Feedback";
-	        this.name = "ofb";
+	  zoom.touchable = function (_) {
+	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant(!!_), zoom) : touchable;
+	  };
 
-	        if (!iv) {
-	            iv = createArray(16);
+	  zoom.extent = function (_) {
+	    return arguments.length ? (extent = typeof _ === "function" ? _ : constant([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+	  };
 
-	        } else if (iv.length != 16) {
-	            throw new Error('invalid initialation vector size (must be 16 bytes)');
-	        }
+	  zoom.scaleExtent = function (_) {
+	    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+	  };
 
-	        this._lastPrecipher = coerceArray(iv, true);
-	        this._lastPrecipherIndex = 16;
+	  zoom.translateExtent = function (_) {
+	    return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
+	  };
 
-	        this._aes = new AES(key);
-	    };
+	  zoom.constrain = function (_) {
+	    return arguments.length ? (constrain = _, zoom) : constrain;
+	  };
 
-	    ModeOfOperationOFB.prototype.encrypt = function(plaintext) {
-	        var encrypted = coerceArray(plaintext, true);
+	  zoom.duration = function (_) {
+	    return arguments.length ? (duration = +_, zoom) : duration;
+	  };
 
-	        for (var i = 0; i < encrypted.length; i++) {
-	            if (this._lastPrecipherIndex === 16) {
-	                this._lastPrecipher = this._aes.encrypt(this._lastPrecipher);
-	                this._lastPrecipherIndex = 0;
-	            }
-	            encrypted[i] ^= this._lastPrecipher[this._lastPrecipherIndex++];
-	        }
+	  zoom.interpolate = function (_) {
+	    return arguments.length ? (interpolate = _, zoom) : interpolate;
+	  };
 
-	        return encrypted;
-	    };
+	  zoom.on = function () {
+	    var value = listeners.on.apply(listeners, arguments);
+	    return value === listeners ? zoom : value;
+	  };
 
-	    // Decryption is symetric
-	    ModeOfOperationOFB.prototype.decrypt = ModeOfOperationOFB.prototype.encrypt;
+	  zoom.clickDistance = function (_) {
+	    return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
+	  };
 
+	  zoom.tapDistance = function (_) {
+	    return arguments.length ? (tapDistance = +_, zoom) : tapDistance;
+	  };
 
-	    /**
-	     *  Counter object for CTR common mode of operation
-	     */
-	    var Counter = function(initialValue) {
-	        if (!(this instanceof Counter)) {
-	            throw Error('Counter must be instanitated with `new`');
-	        }
+	  return zoom;
+	}
 
-	        // We allow 0, but anything false-ish uses the default 1
-	        if (initialValue !== 0 && !initialValue) { initialValue = 1; }
+	/*
+	    Bypasses features of D3's default projection stream pipeline that are unnecessary:
+	    * Antimeridian clipping
+	    * Spherical rotation
+	    * Resampling
+	*/
 
-	        if (typeof(initialValue) === 'number') {
-	            this._counter = createArray(16);
-	            this.setValue(initialValue);
+	function geoRawMercator() {
+	  var project = mercatorRaw;
+	  var k = 512 / Math.PI; // scale
 
-	        } else {
-	            this.setBytes(initialValue);
-	        }
-	    };
+	  var x = 0;
+	  var y = 0; // translate
 
-	    Counter.prototype.setValue = function(value) {
-	        if (typeof(value) !== 'number' || parseInt(value) != value) {
-	            throw new Error('invalid counter value (must be an integer)');
-	        }
+	  var clipExtent = [[0, 0], [0, 0]];
 
-	        // We cannot safely handle numbers beyond the safe range for integers
-	        if (value > Number.MAX_SAFE_INTEGER) {
-	            throw new Error('integer value out of safe range');
-	        }
+	  function projection(point) {
+	    point = project(point[0] * Math.PI / 180, point[1] * Math.PI / 180);
+	    return [point[0] * k + x, y - point[1] * k];
+	  }
 
-	        for (var index = 15; index >= 0; --index) {
-	            this._counter[index] = value % 256;
-	            value = parseInt(value / 256);
-	        }
-	    };
+	  projection.invert = function (point) {
+	    point = project.invert((point[0] - x) / k, (y - point[1]) / k);
+	    return point && [point[0] * 180 / Math.PI, point[1] * 180 / Math.PI];
+	  };
 
-	    Counter.prototype.setBytes = function(bytes) {
-	        bytes = coerceArray(bytes, true);
+	  projection.scale = function (_) {
+	    if (!arguments.length) return k;
+	    k = +_;
+	    return projection;
+	  };
 
-	        if (bytes.length != 16) {
-	            throw new Error('invalid counter bytes size (must be 16 bytes)');
-	        }
+	  projection.translate = function (_) {
+	    if (!arguments.length) return [x, y];
+	    x = +_[0];
+	    y = +_[1];
+	    return projection;
+	  };
 
-	        this._counter = bytes;
-	    };
+	  projection.clipExtent = function (_) {
+	    if (!arguments.length) return clipExtent;
+	    clipExtent = _;
+	    return projection;
+	  };
 
-	    Counter.prototype.increment = function() {
-	        for (var i = 15; i >= 0; i--) {
-	            if (this._counter[i] === 255) {
-	                this._counter[i] = 0;
-	            } else {
-	                this._counter[i]++;
-	                break;
-	            }
-	        }
-	    };
+	  projection.transform = function (obj) {
+	    if (!arguments.length) return identity$2.translate(x, y).scale(k);
+	    x = +obj.x;
+	    y = +obj.y;
+	    k = +obj.k;
+	    return projection;
+	  };
 
+	  projection.stream = d3_geoTransform({
+	    point: function point(x, y) {
+	      var vec = projection([x, y]);
+	      this.stream.point(vec[0], vec[1]);
+	    }
+	  }).stream;
+	  return projection;
+	}
 
-	    /**
-	     *  Mode Of Operation - Counter (CTR)
-	     */
-	    var ModeOfOperationCTR = function(key, counter) {
-	        if (!(this instanceof ModeOfOperationCTR)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
+	function geoOrthoNormalizedDotProduct(a, b, origin) {
+	  if (geoVecEqual(origin, a) || geoVecEqual(origin, b)) {
+	    return 1; // coincident points, treat as straight and try to remove
+	  }
 
-	        this.description = "Counter";
-	        this.name = "ctr";
+	  return geoVecNormalizedDot(a, b, origin);
+	}
 
-	        if (!(counter instanceof Counter)) {
-	            counter = new Counter(counter);
-	        }
+	function geoOrthoFilterDotProduct(dotp, epsilon, lowerThreshold, upperThreshold, allowStraightAngles) {
+	  var val = Math.abs(dotp);
+
+	  if (val < epsilon) {
+	    return 0; // already orthogonal
+	  } else if (allowStraightAngles && Math.abs(val - 1) < epsilon) {
+	    return 0; // straight angle, which is okay in this case
+	  } else if (val < lowerThreshold || val > upperThreshold) {
+	    return dotp; // can be adjusted
+	  } else {
+	    return null; // ignore vertex
+	  }
+	}
 
-	        this._counter = counter;
+	function geoOrthoCalcScore(points, isClosed, epsilon, threshold) {
+	  var score = 0;
+	  var first = isClosed ? 0 : 1;
+	  var last = isClosed ? points.length : points.length - 1;
+	  var coords = points.map(function (p) {
+	    return p.coord;
+	  });
+	  var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+	  var upperThreshold = Math.cos(threshold * Math.PI / 180);
 
-	        this._remainingCounter = null;
-	        this._remainingCounterIndex = 16;
+	  for (var i = first; i < last; i++) {
+	    var a = coords[(i - 1 + coords.length) % coords.length];
+	    var origin = coords[i];
+	    var b = coords[(i + 1) % coords.length];
+	    var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold);
+	    if (dotp === null) continue; // ignore vertex
 
-	        this._aes = new AES(key);
-	    };
+	    score = score + 2.0 * Math.min(Math.abs(dotp - 1.0), Math.min(Math.abs(dotp), Math.abs(dotp + 1)));
+	  }
 
-	    ModeOfOperationCTR.prototype.encrypt = function(plaintext) {
-	        var encrypted = coerceArray(plaintext, true);
+	  return score;
+	} // returns the maximum angle less than `lessThan` between the actual corner and a 0° or 90° corner
 
-	        for (var i = 0; i < encrypted.length; i++) {
-	            if (this._remainingCounterIndex === 16) {
-	                this._remainingCounter = this._aes.encrypt(this._counter._counter);
-	                this._remainingCounterIndex = 0;
-	                this._counter.increment();
-	            }
-	            encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
-	        }
+	function geoOrthoMaxOffsetAngle(coords, isClosed, lessThan) {
+	  var max = -Infinity;
+	  var first = isClosed ? 0 : 1;
+	  var last = isClosed ? coords.length : coords.length - 1;
 
-	        return encrypted;
-	    };
+	  for (var i = first; i < last; i++) {
+	    var a = coords[(i - 1 + coords.length) % coords.length];
+	    var origin = coords[i];
+	    var b = coords[(i + 1) % coords.length];
+	    var normalizedDotP = geoOrthoNormalizedDotProduct(a, b, origin);
+	    var angle = Math.acos(Math.abs(normalizedDotP)) * 180 / Math.PI;
+	    if (angle > 45) angle = 90 - angle;
+	    if (angle >= lessThan) continue;
+	    if (angle > max) max = angle;
+	  }
 
-	    // Decryption is symetric
-	    ModeOfOperationCTR.prototype.decrypt = ModeOfOperationCTR.prototype.encrypt;
+	  if (max === -Infinity) return null;
+	  return max;
+	} // similar to geoOrthoCalcScore, but returns quickly if there is something to do
 
+	function geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles) {
+	  var score = null;
+	  var first = isClosed ? 0 : 1;
+	  var last = isClosed ? coords.length : coords.length - 1;
+	  var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+	  var upperThreshold = Math.cos(threshold * Math.PI / 180);
 
-	    ///////////////////////
-	    // Padding
+	  for (var i = first; i < last; i++) {
+	    var a = coords[(i - 1 + coords.length) % coords.length];
+	    var origin = coords[i];
+	    var b = coords[(i + 1) % coords.length];
+	    var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold, allowStraightAngles);
+	    if (dotp === null) continue; // ignore vertex
 
-	    // See:https://tools.ietf.org/html/rfc2315
-	    function pkcs7pad(data) {
-	        data = coerceArray(data, true);
-	        var padder = 16 - (data.length % 16);
-	        var result = createArray(data.length + padder);
-	        copyArray(data, result);
-	        for (var i = data.length; i < result.length; i++) {
-	            result[i] = padder;
-	        }
-	        return result;
-	    }
+	    if (Math.abs(dotp) > 0) return 1; // something to do
 
-	    function pkcs7strip(data) {
-	        data = coerceArray(data, true);
-	        if (data.length < 16) { throw new Error('PKCS#7 invalid length'); }
+	    score = 0; // already square
+	  }
 
-	        var padder = data[data.length - 1];
-	        if (padder > 16) { throw new Error('PKCS#7 padding byte out of range'); }
+	  return score;
+	}
 
-	        var length = data.length - padder;
-	        for (var i = 0; i < padder; i++) {
-	            if (data[length + i] !== padder) {
-	                throw new Error('PKCS#7 invalid padding byte');
-	            }
-	        }
+	var call$2 = functionCall;
+	var fixRegExpWellKnownSymbolLogic$1 = fixRegexpWellKnownSymbolLogic;
+	var anObject$1 = anObject$n;
+	var toLength$3 = toLength$c;
+	var toString$8 = toString$k;
+	var requireObjectCoercible$7 = requireObjectCoercible$e;
+	var getMethod$1 = getMethod$7;
+	var advanceStringIndex = advanceStringIndex$3;
+	var regExpExec$1 = regexpExecAbstract;
 
-	        var result = createArray(length);
-	        copyArray(data, result, 0, 0, length);
-	        return result;
+	// @@match logic
+	fixRegExpWellKnownSymbolLogic$1('match', function (MATCH, nativeMatch, maybeCallNative) {
+	  return [
+	    // `String.prototype.match` method
+	    // https://tc39.es/ecma262/#sec-string.prototype.match
+	    function match(regexp) {
+	      var O = requireObjectCoercible$7(this);
+	      var matcher = regexp == undefined ? undefined : getMethod$1(regexp, MATCH);
+	      return matcher ? call$2(matcher, regexp, O) : new RegExp(regexp)[MATCH](toString$8(O));
+	    },
+	    // `RegExp.prototype[@@match]` method
+	    // https://tc39.es/ecma262/#sec-regexp.prototype-@@match
+	    function (string) {
+	      var rx = anObject$1(this);
+	      var S = toString$8(string);
+	      var res = maybeCallNative(nativeMatch, rx, S);
+
+	      if (res.done) return res.value;
+
+	      if (!rx.global) return regExpExec$1(rx, S);
+
+	      var fullUnicode = rx.unicode;
+	      rx.lastIndex = 0;
+	      var A = [];
+	      var n = 0;
+	      var result;
+	      while ((result = regExpExec$1(rx, S)) !== null) {
+	        var matchStr = toString$8(result[0]);
+	        A[n] = matchStr;
+	        if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength$3(rx.lastIndex), fullUnicode);
+	        n++;
+	      }
+	      return n === 0 ? null : A;
 	    }
+	  ];
+	});
+
+	var $$s = _export;
+	var FREEZING = freezing;
+	var fails$9 = fails$V;
+	var isObject$4 = isObject$s;
+	var onFreeze = internalMetadata.exports.onFreeze;
+
+	// eslint-disable-next-line es/no-object-freeze -- safe
+	var $freeze = Object.freeze;
+	var FAILS_ON_PRIMITIVES = fails$9(function () { $freeze(1); });
 
-	    ///////////////////////
-	    // Exporting
+	// `Object.freeze` method
+	// https://tc39.es/ecma262/#sec-object.freeze
+	$$s({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !FREEZING }, {
+	  freeze: function freeze(it) {
+	    return $freeze && isObject$4(it) ? $freeze(onFreeze(it)) : it;
+	  }
+	});
 
+	// Returns true if a and b have the same elements at the same indices.
+	function utilArrayIdentical(a, b) {
+	  // an array is always identical to itself
+	  if (a === b) return true;
+	  var i = a.length;
+	  if (i !== b.length) return false;
 
-	    // The block cipher
-	    var aesjs = {
-	        AES: AES,
-	        Counter: Counter,
-
-	        ModeOfOperation: {
-	            ecb: ModeOfOperationECB,
-	            cbc: ModeOfOperationCBC,
-	            cfb: ModeOfOperationCFB,
-	            ofb: ModeOfOperationOFB,
-	            ctr: ModeOfOperationCTR
-	        },
+	  while (i--) {
+	    if (a[i] !== b[i]) return false;
+	  }
 
-	        utils: {
-	            hex: convertHex,
-	            utf8: convertUtf8
-	        },
+	  return true;
+	} // http://2ality.com/2015/01/es6-set-operations.html
+	// Difference (a \ b): create a set that contains those elements of set a that are not in set b.
+	// This operation is also sometimes called minus (-).
+	// var a = [1,2,3];
+	// var b = [4,3,2];
+	// utilArrayDifference(a, b)
+	//   [1]
+	// utilArrayDifference(b, a)
+	//   [4]
 
-	        padding: {
-	            pkcs7: {
-	                pad: pkcs7pad,
-	                strip: pkcs7strip
-	            }
-	        },
+	function utilArrayDifference(a, b) {
+	  var other = new Set(b);
+	  return Array.from(new Set(a)).filter(function (v) {
+	    return !other.has(v);
+	  });
+	} // Intersection (a ∩ b): create a set that contains those elements of set a that are also in set b.
+	// var a = [1,2,3];
+	// var b = [4,3,2];
+	// utilArrayIntersection(a, b)
+	//   [2,3]
 
-	        _arrayTest: {
-	            coerceArray: coerceArray,
-	            createArray: createArray,
-	            copyArray: copyArray,
-	        }
-	    };
+	function utilArrayIntersection(a, b) {
+	  var other = new Set(b);
+	  return Array.from(new Set(a)).filter(function (v) {
+	    return other.has(v);
+	  });
+	} // Union (a ∪ b): create a set that contains the elements of both set a and set b.
+	// var a = [1,2,3];
+	// var b = [4,3,2];
+	// utilArrayUnion(a, b)
+	//   [1,2,3,4]
 
+	function utilArrayUnion(a, b) {
+	  var result = new Set(a);
+	  b.forEach(function (v) {
+	    result.add(v);
+	  });
+	  return Array.from(result);
+	} // Returns an Array with all the duplicates removed
+	// var a = [1,1,2,3,3];
+	// utilArrayUniq(a)
+	//   [1,2,3]
 
-	    // node.js
-	    {
-	        module.exports = aesjs;
+	function utilArrayUniq(a) {
+	  return Array.from(new Set(a));
+	} // Splits array into chunks of given chunk size
+	// var a = [1,2,3,4,5,6,7];
+	// utilArrayChunk(a, 3);
+	//   [[1,2,3],[4,5,6],[7]];
 
-	    // RequireJS/AMD
-	    // http://www.requirejs.org/docs/api.html
-	    // https://github.com/amdjs/amdjs-api/wiki/AMD
-	    }
+	function utilArrayChunk(a, chunkSize) {
+	  if (!chunkSize || chunkSize < 0) return [a.slice()];
+	  var result = new Array(Math.ceil(a.length / chunkSize));
+	  return Array.from(result, function (item, i) {
+	    return a.slice(i * chunkSize, i * chunkSize + chunkSize);
+	  });
+	} // Flattens two level array into a single level
+	// var a = [[1,2,3],[4,5,6],[7]];
+	// utilArrayFlatten(a);
+	//   [1,2,3,4,5,6,7];
 
+	function utilArrayFlatten(a) {
+	  return a.reduce(function (acc, val) {
+	    return acc.concat(val);
+	  }, []);
+	} // Groups the items of the Array according to the given key
+	// `key` can be passed as a property or as a key function
+	//
+	// var pets = [
+	//     { type: 'Dog', name: 'Spot' },
+	//     { type: 'Cat', name: 'Tiger' },
+	//     { type: 'Dog', name: 'Rover' },
+	//     { type: 'Cat', name: 'Leo' }
+	// ];
+	//
+	// utilArrayGroupBy(pets, 'type')
+	//   {
+	//     'Dog': [{type: 'Dog', name: 'Spot'}, {type: 'Dog', name: 'Rover'}],
+	//     'Cat': [{type: 'Cat', name: 'Tiger'}, {type: 'Cat', name: 'Leo'}]
+	//   }
+	//
+	// utilArrayGroupBy(pets, function(item) { return item.name.length; })
+	//   {
+	//     3: [{type: 'Cat', name: 'Leo'}],
+	//     4: [{type: 'Dog', name: 'Spot'}],
+	//     5: [{type: 'Cat', name: 'Tiger'}, {type: 'Dog', name: 'Rover'}]
+	//   }
 
-	})();
-	});
+	function utilArrayGroupBy(a, key) {
+	  return a.reduce(function (acc, item) {
+	    var group = typeof key === 'function' ? key(item) : item[key];
+	    (acc[group] = acc[group] || []).push(item);
+	    return acc;
+	  }, {});
+	} // Returns an Array with all the duplicates removed
+	// where uniqueness determined by the given key
+	// `key` can be passed as a property or as a key function
+	//
+	// var pets = [
+	//     { type: 'Dog', name: 'Spot' },
+	//     { type: 'Cat', name: 'Tiger' },
+	//     { type: 'Dog', name: 'Rover' },
+	//     { type: 'Cat', name: 'Leo' }
+	// ];
+	//
+	// utilArrayUniqBy(pets, 'type')
+	//   [
+	//     { type: 'Dog', name: 'Spot' },
+	//     { type: 'Cat', name: 'Tiger' }
+	//   ]
+	//
+	// utilArrayUniqBy(pets, function(item) { return item.name.length; })
+	//   [
+	//     { type: 'Dog', name: 'Spot' },
+	//     { type: 'Cat', name: 'Tiger' },
+	//     { type: 'Cat', name: 'Leo' }
+	//   }
 
-	// See https://github.com/ricmoo/aes-js
-	// We can use keys that are 128 bits (16 bytes), 192 bits (24 bytes) or 256 bits (32 bytes).
-	// To generate a random key:  window.crypto.getRandomValues(new Uint8Array(16));
+	function utilArrayUniqBy(a, key) {
+	  var seen = new Set();
+	  return a.reduce(function (acc, item) {
+	    var val = typeof key === 'function' ? key(item) : item[key];
+
+	    if (val && !seen.has(val)) {
+	      seen.add(val);
+	      acc.push(item);
+	    }
+
+	    return acc;
+	  }, []);
+	}
+
+	var uncurryThis$d = functionUncurryThis;
+
+	// `thisNumberValue` abstract operation
+	// https://tc39.es/ecma262/#sec-thisnumbervalue
+	var thisNumberValue$3 = uncurryThis$d(1.0.valueOf);
+
+	var DESCRIPTORS$3 = descriptors;
+	var global$a = global$1o;
+	var uncurryThis$c = functionUncurryThis;
+	var isForced = isForced_1;
+	var redefine$2 = redefine$h.exports;
+	var hasOwn$1 = hasOwnProperty_1;
+	var inheritIfRequired = inheritIfRequired$4;
+	var isPrototypeOf = objectIsPrototypeOf;
+	var isSymbol$1 = isSymbol$6;
+	var toPrimitive$1 = toPrimitive$3;
+	var fails$8 = fails$V;
+	var getOwnPropertyNames = objectGetOwnPropertyNames.f;
+	var getOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
+	var defineProperty = objectDefineProperty.f;
+	var thisNumberValue$2 = thisNumberValue$3;
+	var trim$2 = stringTrim.trim;
+
+	var NUMBER = 'Number';
+	var NativeNumber = global$a[NUMBER];
+	var NumberPrototype = NativeNumber.prototype;
+	var TypeError$4 = global$a.TypeError;
+	var arraySlice$1 = uncurryThis$c(''.slice);
+	var charCodeAt$1 = uncurryThis$c(''.charCodeAt);
+
+	// `ToNumeric` abstract operation
+	// https://tc39.es/ecma262/#sec-tonumeric
+	var toNumeric = function (value) {
+	  var primValue = toPrimitive$1(value, 'number');
+	  return typeof primValue == 'bigint' ? primValue : toNumber$1(primValue);
+	};
+
+	// `ToNumber` abstract operation
+	// https://tc39.es/ecma262/#sec-tonumber
+	var toNumber$1 = function (argument) {
+	  var it = toPrimitive$1(argument, 'number');
+	  var first, third, radix, maxCode, digits, length, index, code;
+	  if (isSymbol$1(it)) throw TypeError$4('Cannot convert a Symbol value to a number');
+	  if (typeof it == 'string' && it.length > 2) {
+	    it = trim$2(it);
+	    first = charCodeAt$1(it, 0);
+	    if (first === 43 || first === 45) {
+	      third = charCodeAt$1(it, 2);
+	      if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix
+	    } else if (first === 48) {
+	      switch (charCodeAt$1(it, 1)) {
+	        case 66: case 98: radix = 2; maxCode = 49; break; // fast equal of /^0b[01]+$/i
+	        case 79: case 111: radix = 8; maxCode = 55; break; // fast equal of /^0o[0-7]+$/i
+	        default: return +it;
+	      }
+	      digits = arraySlice$1(it, 2);
+	      length = digits.length;
+	      for (index = 0; index < length; index++) {
+	        code = charCodeAt$1(digits, index);
+	        // parseInt parses a string to a first unavailable symbol
+	        // but ToNumber should return NaN if a string contains unavailable symbols
+	        if (code < 48 || code > maxCode) return NaN;
+	      } return parseInt(digits, radix);
+	    }
+	  } return +it;
+	};
+
+	// `Number` constructor
+	// https://tc39.es/ecma262/#sec-number-constructor
+	if (isForced(NUMBER, !NativeNumber(' 0o1') || !NativeNumber('0b1') || NativeNumber('+0x1'))) {
+	  var NumberWrapper = function Number(value) {
+	    var n = arguments.length < 1 ? 0 : NativeNumber(toNumeric(value));
+	    var dummy = this;
+	    // check on 1..constructor(foo) case
+	    return isPrototypeOf(NumberPrototype, dummy) && fails$8(function () { thisNumberValue$2(dummy); })
+	      ? inheritIfRequired(Object(n), dummy, NumberWrapper) : n;
+	  };
+	  for (var keys = DESCRIPTORS$3 ? getOwnPropertyNames(NativeNumber) : (
+	    // ES3:
+	    'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +
+	    // ES2015 (in case, if modules with ES2015 Number statics required before):
+	    'EPSILON,MAX_SAFE_INTEGER,MIN_SAFE_INTEGER,isFinite,isInteger,isNaN,isSafeInteger,parseFloat,parseInt,' +
+	    // ESNext
+	    'fromString,range'
+	  ).split(','), j$1 = 0, key; keys.length > j$1; j$1++) {
+	    if (hasOwn$1(NativeNumber, key = keys[j$1]) && !hasOwn$1(NumberWrapper, key)) {
+	      defineProperty(NumberWrapper, key, getOwnPropertyDescriptor$2(NativeNumber, key));
+	    }
+	  }
+	  NumberWrapper.prototype = NumberPrototype;
+	  NumberPrototype.constructor = NumberWrapper;
+	  redefine$2(global$a, NUMBER, NumberWrapper);
+	}
+
+	var diacritics = {};
+
+	var remove$6 = diacritics.remove = removeDiacritics;
+	var replacementList = [{
+	  base: ' ',
+	  chars: "\xA0"
+	}, {
+	  base: '0',
+	  chars: "\u07C0"
+	}, {
+	  base: 'A',
+	  chars: "\u24B6\uFF21\xC0\xC1\xC2\u1EA6\u1EA4\u1EAA\u1EA8\xC3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\xC4\u01DE\u1EA2\xC5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F"
+	}, {
+	  base: 'AA',
+	  chars: "\uA732"
+	}, {
+	  base: 'AE',
+	  chars: "\xC6\u01FC\u01E2"
+	}, {
+	  base: 'AO',
+	  chars: "\uA734"
+	}, {
+	  base: 'AU',
+	  chars: "\uA736"
+	}, {
+	  base: 'AV',
+	  chars: "\uA738\uA73A"
+	}, {
+	  base: 'AY',
+	  chars: "\uA73C"
+	}, {
+	  base: 'B',
+	  chars: "\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0181"
+	}, {
+	  base: 'C',
+	  chars: "\u24B8\uFF23\uA73E\u1E08\u0106C\u0108\u010A\u010C\xC7\u0187\u023B"
+	}, {
+	  base: 'D',
+	  chars: "\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018A\u0189\u1D05\uA779"
+	}, {
+	  base: 'Dh',
+	  chars: "\xD0"
+	}, {
+	  base: 'DZ',
+	  chars: "\u01F1\u01C4"
+	}, {
+	  base: 'Dz',
+	  chars: "\u01F2\u01C5"
+	}, {
+	  base: 'E',
+	  chars: "\u025B\u24BA\uFF25\xC8\xC9\xCA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\xCB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E\u1D07"
+	}, {
+	  base: 'F',
+	  chars: "\uA77C\u24BB\uFF26\u1E1E\u0191\uA77B"
+	}, {
+	  base: 'G',
+	  chars: "\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E\u0262"
+	}, {
+	  base: 'H',
+	  chars: "\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D"
+	}, {
+	  base: 'I',
+	  chars: "\u24BE\uFF29\xCC\xCD\xCE\u0128\u012A\u012C\u0130\xCF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197"
+	}, {
+	  base: 'J',
+	  chars: "\u24BF\uFF2A\u0134\u0248\u0237"
+	}, {
+	  base: 'K',
+	  chars: "\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2"
+	}, {
+	  base: 'L',
+	  chars: "\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780"
+	}, {
+	  base: 'LJ',
+	  chars: "\u01C7"
+	}, {
+	  base: 'Lj',
+	  chars: "\u01C8"
+	}, {
+	  base: 'M',
+	  chars: "\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C\u03FB"
+	}, {
+	  base: 'N',
+	  chars: "\uA7A4\u0220\u24C3\uFF2E\u01F8\u0143\xD1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u019D\uA790\u1D0E"
+	}, {
+	  base: 'NJ',
+	  chars: "\u01CA"
+	}, {
+	  base: 'Nj',
+	  chars: "\u01CB"
+	}, {
+	  base: 'O',
+	  chars: "\u24C4\uFF2F\xD2\xD3\xD4\u1ED2\u1ED0\u1ED6\u1ED4\xD5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\xD6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\xD8\u01FE\u0186\u019F\uA74A\uA74C"
+	}, {
+	  base: 'OE',
+	  chars: "\u0152"
+	}, {
+	  base: 'OI',
+	  chars: "\u01A2"
+	}, {
+	  base: 'OO',
+	  chars: "\uA74E"
+	}, {
+	  base: 'OU',
+	  chars: "\u0222"
+	}, {
+	  base: 'P',
+	  chars: "\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754"
+	}, {
+	  base: 'Q',
+	  chars: "\u24C6\uFF31\uA756\uA758\u024A"
+	}, {
+	  base: 'R',
+	  chars: "\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782"
+	}, {
+	  base: 'S',
+	  chars: "\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784"
+	}, {
+	  base: 'T',
+	  chars: "\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786"
+	}, {
+	  base: 'Th',
+	  chars: "\xDE"
+	}, {
+	  base: 'TZ',
+	  chars: "\uA728"
+	}, {
+	  base: 'U',
+	  chars: "\u24CA\uFF35\xD9\xDA\xDB\u0168\u1E78\u016A\u1E7A\u016C\xDC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244"
+	}, {
+	  base: 'V',
+	  chars: "\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245"
+	}, {
+	  base: 'VY',
+	  chars: "\uA760"
+	}, {
+	  base: 'W',
+	  chars: "\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72"
+	}, {
+	  base: 'X',
+	  chars: "\u24CD\uFF38\u1E8A\u1E8C"
+	}, {
+	  base: 'Y',
+	  chars: "\u24CE\uFF39\u1EF2\xDD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE"
+	}, {
+	  base: 'Z',
+	  chars: "\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762"
+	}, {
+	  base: 'a',
+	  chars: "\u24D0\uFF41\u1E9A\xE0\xE1\xE2\u1EA7\u1EA5\u1EAB\u1EA9\xE3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\xE4\u01DF\u1EA3\xE5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250\u0251"
+	}, {
+	  base: 'aa',
+	  chars: "\uA733"
+	}, {
+	  base: 'ae',
+	  chars: "\xE6\u01FD\u01E3"
+	}, {
+	  base: 'ao',
+	  chars: "\uA735"
+	}, {
+	  base: 'au',
+	  chars: "\uA737"
+	}, {
+	  base: 'av',
+	  chars: "\uA739\uA73B"
+	}, {
+	  base: 'ay',
+	  chars: "\uA73D"
+	}, {
+	  base: 'b',
+	  chars: "\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253\u0182"
+	}, {
+	  base: 'c',
+	  chars: "\uFF43\u24D2\u0107\u0109\u010B\u010D\xE7\u1E09\u0188\u023C\uA73F\u2184"
+	}, {
+	  base: 'd',
+	  chars: "\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\u018B\u13E7\u0501\uA7AA"
+	}, {
+	  base: 'dh',
+	  chars: "\xF0"
+	}, {
+	  base: 'dz',
+	  chars: "\u01F3\u01C6"
+	}, {
+	  base: 'e',
+	  chars: "\u24D4\uFF45\xE8\xE9\xEA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\xEB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u01DD"
+	}, {
+	  base: 'f',
+	  chars: "\u24D5\uFF46\u1E1F\u0192"
+	}, {
+	  base: 'ff',
+	  chars: "\uFB00"
+	}, {
+	  base: 'fi',
+	  chars: "\uFB01"
+	}, {
+	  base: 'fl',
+	  chars: "\uFB02"
+	}, {
+	  base: 'ffi',
+	  chars: "\uFB03"
+	}, {
+	  base: 'ffl',
+	  chars: "\uFB04"
+	}, {
+	  base: 'g',
+	  chars: "\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\uA77F\u1D79"
+	}, {
+	  base: 'h',
+	  chars: "\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265"
+	}, {
+	  base: 'hv',
+	  chars: "\u0195"
+	}, {
+	  base: 'i',
+	  chars: "\u24D8\uFF49\xEC\xED\xEE\u0129\u012B\u012D\xEF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131"
+	}, {
+	  base: 'j',
+	  chars: "\u24D9\uFF4A\u0135\u01F0\u0249"
+	}, {
+	  base: 'k',
+	  chars: "\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3"
+	}, {
+	  base: 'l',
+	  chars: "\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747\u026D"
+	}, {
+	  base: 'lj',
+	  chars: "\u01C9"
+	}, {
+	  base: 'm',
+	  chars: "\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F"
+	}, {
+	  base: 'n',
+	  chars: "\u24DD\uFF4E\u01F9\u0144\xF1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5\u043B\u0509"
+	}, {
+	  base: 'nj',
+	  chars: "\u01CC"
+	}, {
+	  base: 'o',
+	  chars: "\u24DE\uFF4F\xF2\xF3\xF4\u1ED3\u1ED1\u1ED7\u1ED5\xF5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\xF6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\xF8\u01FF\uA74B\uA74D\u0275\u0254\u1D11"
+	}, {
+	  base: 'oe',
+	  chars: "\u0153"
+	}, {
+	  base: 'oi',
+	  chars: "\u01A3"
+	}, {
+	  base: 'oo',
+	  chars: "\uA74F"
+	}, {
+	  base: 'ou',
+	  chars: "\u0223"
+	}, {
+	  base: 'p',
+	  chars: "\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755\u03C1"
+	}, {
+	  base: 'q',
+	  chars: "\u24E0\uFF51\u024B\uA757\uA759"
+	}, {
+	  base: 'r',
+	  chars: "\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783"
+	}, {
+	  base: 's',
+	  chars: "\u24E2\uFF53\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B\u0282"
+	}, {
+	  base: 'ss',
+	  chars: "\xDF"
+	}, {
+	  base: 't',
+	  chars: "\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787"
+	}, {
+	  base: 'th',
+	  chars: "\xFE"
+	}, {
+	  base: 'tz',
+	  chars: "\uA729"
+	}, {
+	  base: 'u',
+	  chars: "\u24E4\uFF55\xF9\xFA\xFB\u0169\u1E79\u016B\u1E7B\u016D\xFC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289"
+	}, {
+	  base: 'v',
+	  chars: "\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C"
+	}, {
+	  base: 'vy',
+	  chars: "\uA761"
+	}, {
+	  base: 'w',
+	  chars: "\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73"
+	}, {
+	  base: 'x',
+	  chars: "\u24E7\uFF58\u1E8B\u1E8D"
+	}, {
+	  base: 'y',
+	  chars: "\u24E8\uFF59\u1EF3\xFD\u0177\u1EF9\u0233\u1E8F\xFF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF"
+	}, {
+	  base: 'z',
+	  chars: "\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763"
+	}];
+	var diacriticsMap = {};
 
-	// This default signing key is built into iD and can be used to mask/unmask sensitive values.
-	var DEFAULT_128 = [250, 157, 60, 79, 142, 134, 229, 129, 138, 126, 210, 129, 29, 71, 160, 208];
+	for (var i$1 = 0; i$1 < replacementList.length; i$1 += 1) {
+	  var chars = replacementList[i$1].chars;
 
+	  for (var j = 0; j < chars.length; j += 1) {
+	    diacriticsMap[chars[j]] = replacementList[i$1].base;
+	  }
+	}
 
-	function utilAesEncrypt(text, key) {
-	  key = key || DEFAULT_128;
-	  var textBytes = aesJs.utils.utf8.toBytes(text);
-	  var aesCtr = new aesJs.ModeOfOperation.ctr(key);
-	  var encryptedBytes = aesCtr.encrypt(textBytes);
-	  var encryptedHex = aesJs.utils.hex.fromBytes(encryptedBytes);
-	  return encryptedHex;
+	function removeDiacritics(str) {
+	  return str.replace(/[^\u0000-\u007e]/g, function (c) {
+	    return diacriticsMap[c] || c;
+	  });
 	}
 
+	diacritics.replacementList = replacementList;
+	diacritics.diacriticsMap = diacriticsMap;
 
-	function utilAesDecrypt(encryptedHex, key) {
-	  key = key || DEFAULT_128;
-	  var encryptedBytes = aesJs.utils.hex.toBytes(encryptedHex);
-	  var aesCtr = new aesJs.ModeOfOperation.ctr(key);
-	  var decryptedBytes = aesCtr.decrypt(encryptedBytes);
-	  var text = aesJs.utils.utf8.fromBytes(decryptedBytes);
-	  return text;
-	}
+	var lib = {};
 
-	function utilCleanTags(tags) {
-	    var out = {};
-	    for (var k in tags) {
-	        if (!k) { continue; }
-	        var v = tags[k];
-	        if (v !== undefined) {
-	            out[k] = cleanValue(k, v);
-	        }
-	    }
+	var isArabic$1 = {};
+
+	Object.defineProperty(isArabic$1, "__esModule", {
+	  value: true
+	});
+	var arabicBlocks = [[0x0600, 0x06FF], [0x0750, 0x077F], [0x08A0, 0x08FF], [0xFB50, 0xFDFF], [0xFE70, 0xFEFF], [0x10E60, 0x10E7F], [0x1EC70, 0x1ECBF], [0x1EE00, 0x1EEFF] // Mathematical Alphabetic symbols https://www.unicode.org/charts/PDF/U1EE00.pdf
+	];
 
-	    return out;
+	function isArabic(_char) {
+	  if (_char.length > 1) {
+	    // allow the newer chars?
+	    throw new Error('isArabic works on only one-character strings');
+	  }
 
+	  var code = _char.charCodeAt(0);
 
-	    function cleanValue(k, v) {
-	        function keepSpaces(k) {
-	            return /_hours|_times|:conditional$/.test(k);
-	        }
+	  for (var i = 0; i < arabicBlocks.length; i++) {
+	    var block = arabicBlocks[i];
 
-	        function skip(k) {
-	            return /^(description|note|fixme)$/.test(k);
-	        }
+	    if (code >= block[0] && code <= block[1]) {
+	      return true;
+	    }
+	  }
 
-	        if (skip(k)) { return v; }
+	  return false;
+	}
 
-	        var cleaned = v
-	            .split(';')
-	            .map(function(s) { return s.trim(); })
-	            .join(keepSpaces(k) ? '; ' : ';');
+	isArabic$1.isArabic = isArabic;
 
-	        // The code below is not intended to validate websites and emails.
-	        // It is only intended to prevent obvious copy-paste errors. (#2323)
-	        // clean website- and email-like tags
-	        if (k.indexOf('website') !== -1 ||
-	            k.indexOf('email') !== -1 ||
-	            cleaned.indexOf('http') === 0) {
-	            cleaned = cleaned
-	                .replace(/[\u200B-\u200F\uFEFF]/g, '');  // strip LRM and other zero width chars
+	function isMath(_char2) {
+	  if (_char2.length > 2) {
+	    // allow the newer chars?
+	    throw new Error('isMath works on only one-character strings');
+	  }
 
-	        }
+	  var code = _char2.charCodeAt(0);
 
-	        return cleaned;
-	    }
+	  return code >= 0x660 && code <= 0x66C || code >= 0x6F0 && code <= 0x6F9;
 	}
 
-	// Like selection.property('value', ...), but avoids no-op value sets,
-	// which can result in layout/repaint thrashing in some situations.
-	function utilGetSetValue(selection, value) {
-	    function d3_selection_value(value) {
-	        function valueNull() {
-	            delete this.value;
-	        }
+	isArabic$1.isMath = isMath;
 
-	        function valueConstant() {
-	            if (this.value !== value) {
-	                this.value = value;
-	            }
-	        }
+	var GlyphSplitter$1 = {};
 
-	        function valueFunction() {
-	            var x = value.apply(this, arguments);
-	            if (x == null) {
-	                delete this.value;
-	            } else if (this.value !== x) {
-	                this.value = x;
-	            }
-	        }
+	var reference = {};
 
-	        return value == null
-	            ? valueNull : (typeof value === 'function'
-	            ? valueFunction : valueConstant);
-	    }
+	var unicodeArabic = {};
 
-	    if (arguments.length === 1) {
-	        return selection.property('value');
+	Object.defineProperty(unicodeArabic, "__esModule", {
+	  value: true
+	});
+	var arabicReference = {
+	  "alef": {
+	    "normal": ["\u0627"],
+	    "madda_above": {
+	      "normal": ["\u0627\u0653", "\u0622"],
+	      "isolated": "\uFE81",
+	      "final": "\uFE82"
+	    },
+	    "hamza_above": {
+	      "normal": ["\u0627\u0654", "\u0623"],
+	      "isolated": "\uFE83",
+	      "final": "\uFE84"
+	    },
+	    "hamza_below": {
+	      "normal": ["\u0627\u0655", "\u0625"],
+	      "isolated": "\uFE87",
+	      "final": "\uFE88"
+	    },
+	    "wasla": {
+	      "normal": "\u0671",
+	      "isolated": "\uFB50",
+	      "final": "\uFB51"
+	    },
+	    "wavy_hamza_above": ["\u0672"],
+	    "wavy_hamza_below": ["\u0627\u065F", "\u0673"],
+	    "high_hamza": ["\u0675", "\u0627\u0674"],
+	    "indic_two_above": ["\u0773"],
+	    "indic_three_above": ["\u0774"],
+	    "fathatan": {
+	      "normal": ["\u0627\u064B"],
+	      "final": "\uFD3C",
+	      "isolated": "\uFD3D"
+	    },
+	    "isolated": "\uFE8D",
+	    "final": "\uFE8E"
+	  },
+	  "beh": {
+	    "normal": ["\u0628"],
+	    "dotless": ["\u066E"],
+	    "three_dots_horizontally_below": ["\u0750"],
+	    "dot_below_three_dots_above": ["\u0751"],
+	    "three_dots_pointing_upwards_below": ["\u0752"],
+	    "three_dots_pointing_upwards_below_two_dots_above": ["\u0753"],
+	    "two_dots_below_dot_above": ["\u0754"],
+	    "inverted_small_v_below": ["\u0755"],
+	    "small_v": ["\u0756"],
+	    "small_v_below": ["\u08A0"],
+	    "hamza_above": ["\u08A1"],
+	    "small_meem_above": ["\u08B6"],
+	    "isolated": "\uFE8F",
+	    "final": "\uFE90",
+	    "initial": "\uFE91",
+	    "medial": "\uFE92"
+	  },
+	  "teh marbuta": {
+	    "normal": ["\u0629"],
+	    "isolated": "\uFE93",
+	    "final": "\uFE94"
+	  },
+	  "teh": {
+	    "normal": ["\u062A"],
+	    "ring": ["\u067C"],
+	    "three_dots_above_downwards": ["\u067D"],
+	    "small_teh_above": ["\u08B8"],
+	    "isolated": "\uFE95",
+	    "final": "\uFE96",
+	    "initial": "\uFE97",
+	    "medial": "\uFE98"
+	  },
+	  "theh": {
+	    "normal": ["\u062B"],
+	    "isolated": "\uFE99",
+	    "final": "\uFE9A",
+	    "initial": "\uFE9B",
+	    "medial": "\uFE9C"
+	  },
+	  "jeem": {
+	    "normal": ["\u062C"],
+	    "two_dots_above": ["\u08A2"],
+	    "isolated": "\uFE9D",
+	    "final": "\uFE9E",
+	    "initial": "\uFE9F",
+	    "medial": "\uFEA0"
+	  },
+	  "hah": {
+	    "normal": ["\u062D"],
+	    "hamza_above": ["\u0681"],
+	    "two_dots_vertical_above": ["\u0682"],
+	    "three_dots_above": ["\u0685"],
+	    "two_dots_above": ["\u0757"],
+	    "three_dots_pointing_upwards_below": ["\u0758"],
+	    "small_tah_below": ["\u076E"],
+	    "small_tah_two_dots": ["\u076F"],
+	    "small_tah_above": ["\u0772"],
+	    "indic_four_below": ["\u077C"],
+	    "isolated": "\uFEA1",
+	    "final": "\uFEA2",
+	    "initial": "\uFEA3",
+	    "medial": "\uFEA4"
+	  },
+	  "khah": {
+	    "normal": ["\u062E"],
+	    "isolated": "\uFEA5",
+	    "final": "\uFEA6",
+	    "initial": "\uFEA7",
+	    "medial": "\uFEA8"
+	  },
+	  "dal": {
+	    "normal": ["\u062F"],
+	    "ring": ["\u0689"],
+	    "dot_below": ["\u068A"],
+	    "dot_below_small_tah": ["\u068B"],
+	    "three_dots_above_downwards": ["\u068F"],
+	    "four_dots_above": ["\u0690"],
+	    "inverted_v": ["\u06EE"],
+	    "two_dots_vertically_below_small_tah": ["\u0759"],
+	    "inverted_small_v_below": ["\u075A"],
+	    "three_dots_below": ["\u08AE"],
+	    "isolated": "\uFEA9",
+	    "final": "\uFEAA"
+	  },
+	  "thal": {
+	    "normal": ["\u0630"],
+	    "isolated": "\uFEAB",
+	    "final": "\uFEAC"
+	  },
+	  "reh": {
+	    "normal": ["\u0631"],
+	    "small_v": ["\u0692"],
+	    "ring": ["\u0693"],
+	    "dot_below": ["\u0694"],
+	    "small_v_below": ["\u0695"],
+	    "dot_below_dot_above": ["\u0696"],
+	    "two_dots_above": ["\u0697"],
+	    "four_dots_above": ["\u0699"],
+	    "inverted_v": ["\u06EF"],
+	    "stroke": ["\u075B"],
+	    "two_dots_vertically_above": ["\u076B"],
+	    "hamza_above": ["\u076C"],
+	    "small_tah_two_dots": ["\u0771"],
+	    "loop": ["\u08AA"],
+	    "small_noon_above": ["\u08B9"],
+	    "isolated": "\uFEAD",
+	    "final": "\uFEAE"
+	  },
+	  "zain": {
+	    "normal": ["\u0632"],
+	    "inverted_v_above": ["\u08B2"],
+	    "isolated": "\uFEAF",
+	    "final": "\uFEB0"
+	  },
+	  "seen": {
+	    "normal": ["\u0633"],
+	    "dot_below_dot_above": ["\u069A"],
+	    "three_dots_below": ["\u069B"],
+	    "three_dots_below_three_dots_above": ["\u069C"],
+	    "four_dots_above": ["\u075C"],
+	    "two_dots_vertically_above": ["\u076D"],
+	    "small_tah_two_dots": ["\u0770"],
+	    "indic_four_above": ["\u077D"],
+	    "inverted_v": ["\u077E"],
+	    "isolated": "\uFEB1",
+	    "final": "\uFEB2",
+	    "initial": "\uFEB3",
+	    "medial": "\uFEB4"
+	  },
+	  "sheen": {
+	    "normal": ["\u0634"],
+	    "dot_below": ["\u06FA"],
+	    "isolated": "\uFEB5",
+	    "final": "\uFEB6",
+	    "initial": "\uFEB7",
+	    "medial": "\uFEB8"
+	  },
+	  "sad": {
+	    "normal": ["\u0635"],
+	    "two_dots_below": ["\u069D"],
+	    "three_dots_above": ["\u069E"],
+	    "three_dots_below": ["\u08AF"],
+	    "isolated": "\uFEB9",
+	    "final": "\uFEBA",
+	    "initial": "\uFEBB",
+	    "medial": "\uFEBC"
+	  },
+	  "dad": {
+	    "normal": ["\u0636"],
+	    "dot_below": ["\u06FB"],
+	    "isolated": "\uFEBD",
+	    "final": "\uFEBE",
+	    "initial": "\uFEBF",
+	    "medial": "\uFEC0"
+	  },
+	  "tah": {
+	    "normal": ["\u0637"],
+	    "three_dots_above": ["\u069F"],
+	    "two_dots_above": ["\u08A3"],
+	    "isolated": "\uFEC1",
+	    "final": "\uFEC2",
+	    "initial": "\uFEC3",
+	    "medial": "\uFEC4"
+	  },
+	  "zah": {
+	    "normal": ["\u0638"],
+	    "isolated": "\uFEC5",
+	    "final": "\uFEC6",
+	    "initial": "\uFEC7",
+	    "medial": "\uFEC8"
+	  },
+	  "ain": {
+	    "normal": ["\u0639"],
+	    "three_dots_above": ["\u06A0"],
+	    "two_dots_above": ["\u075D"],
+	    "three_dots_pointing_downwards_above": ["\u075E"],
+	    "two_dots_vertically_above": ["\u075F"],
+	    "three_dots_below": ["\u08B3"],
+	    "isolated": "\uFEC9",
+	    "final": "\uFECA",
+	    "initial": "\uFECB",
+	    "medial": "\uFECC"
+	  },
+	  "ghain": {
+	    "normal": ["\u063A"],
+	    "dot_below": ["\u06FC"],
+	    "isolated": "\uFECD",
+	    "final": "\uFECE",
+	    "initial": "\uFECF",
+	    "medial": "\uFED0"
+	  },
+	  "feh": {
+	    "normal": ["\u0641"],
+	    "dotless": ["\u06A1"],
+	    "dot_moved_below": ["\u06A2"],
+	    "dot_below": ["\u06A3"],
+	    "three_dots_below": ["\u06A5"],
+	    "two_dots_below": ["\u0760"],
+	    "three_dots_pointing_upwards_below": ["\u0761"],
+	    "dot_below_three_dots_above": ["\u08A4"],
+	    "isolated": "\uFED1",
+	    "final": "\uFED2",
+	    "initial": "\uFED3",
+	    "medial": "\uFED4"
+	  },
+	  "qaf": {
+	    "normal": ["\u0642"],
+	    "dotless": ["\u066F"],
+	    "dot_above": ["\u06A7"],
+	    "three_dots_above": ["\u06A8"],
+	    "dot_below": ["\u08A5"],
+	    "isolated": "\uFED5",
+	    "final": "\uFED6",
+	    "initial": "\uFED7",
+	    "medial": "\uFED8"
+	  },
+	  "kaf": {
+	    "normal": ["\u0643"],
+	    "swash": ["\u06AA"],
+	    "ring": ["\u06AB"],
+	    "dot_above": ["\u06AC"],
+	    "three_dots_below": ["\u06AE"],
+	    "two_dots_above": ["\u077F"],
+	    "dot_below": ["\u08B4"],
+	    "isolated": "\uFED9",
+	    "final": "\uFEDA",
+	    "initial": "\uFEDB",
+	    "medial": "\uFEDC"
+	  },
+	  "lam": {
+	    "normal": ["\u0644"],
+	    "small_v": ["\u06B5"],
+	    "dot_above": ["\u06B6"],
+	    "three_dots_above": ["\u06B7"],
+	    "three_dots_below": ["\u06B8"],
+	    "bar": ["\u076A"],
+	    "double_bar": ["\u08A6"],
+	    "isolated": "\uFEDD",
+	    "final": "\uFEDE",
+	    "initial": "\uFEDF",
+	    "medial": "\uFEE0"
+	  },
+	  "meem": {
+	    "normal": ["\u0645"],
+	    "dot_above": ["\u0765"],
+	    "dot_below": ["\u0766"],
+	    "three_dots_above": ["\u08A7"],
+	    "isolated": "\uFEE1",
+	    "final": "\uFEE2",
+	    "initial": "\uFEE3",
+	    "medial": "\uFEE4"
+	  },
+	  "noon": {
+	    "normal": ["\u0646"],
+	    "dot_below": ["\u06B9"],
+	    "ring": ["\u06BC"],
+	    "three_dots_above": ["\u06BD"],
+	    "two_dots_below": ["\u0767"],
+	    "small_tah": ["\u0768"],
+	    "small_v": ["\u0769"],
+	    "isolated": "\uFEE5",
+	    "final": "\uFEE6",
+	    "initial": "\uFEE7",
+	    "medial": "\uFEE8"
+	  },
+	  "heh": {
+	    "normal": ["\u0647"],
+	    "isolated": "\uFEE9",
+	    "final": "\uFEEA",
+	    "initial": "\uFEEB",
+	    "medial": "\uFEEC"
+	  },
+	  "waw": {
+	    "normal": ["\u0648"],
+	    "hamza_above": {
+	      "normal": ["\u0624", "\u0648\u0654"],
+	      "isolated": "\uFE85",
+	      "final": "\uFE86"
+	    },
+	    "high_hamza": ["\u0676", "\u0648\u0674"],
+	    "ring": ["\u06C4"],
+	    "two_dots_above": ["\u06CA"],
+	    "dot_above": ["\u06CF"],
+	    "indic_two_above": ["\u0778"],
+	    "indic_three_above": ["\u0779"],
+	    "dot_within": ["\u08AB"],
+	    "isolated": "\uFEED",
+	    "final": "\uFEEE"
+	  },
+	  "alef_maksura": {
+	    "normal": ["\u0649"],
+	    "hamza_above": ["\u0626", "\u064A\u0654"],
+	    "initial": "\uFBE8",
+	    "medial": "\uFBE9",
+	    "isolated": "\uFEEF",
+	    "final": "\uFEF0"
+	  },
+	  "yeh": {
+	    "normal": ["\u064A"],
+	    "hamza_above": {
+	      "normal": ["\u0626", "\u0649\u0654"],
+	      "isolated": "\uFE89",
+	      "final": "\uFE8A",
+	      "initial": "\uFE8B",
+	      "medial": "\uFE8C"
+	    },
+	    "two_dots_below_hamza_above": ["\u08A8"],
+	    "high_hamza": ["\u0678", "\u064A\u0674"],
+	    "tail": ["\u06CD"],
+	    "small_v": ["\u06CE"],
+	    "three_dots_below": ["\u06D1"],
+	    "two_dots_below_dot_above": ["\u08A9"],
+	    "two_dots_below_small_noon_above": ["\u08BA"],
+	    "isolated": "\uFEF1",
+	    "final": "\uFEF2",
+	    "initial": "\uFEF3",
+	    "medial": "\uFEF4"
+	  },
+	  "tteh": {
+	    "normal": ["\u0679"],
+	    "isolated": "\uFB66",
+	    "final": "\uFB67",
+	    "initial": "\uFB68",
+	    "medial": "\uFB69"
+	  },
+	  "tteheh": {
+	    "normal": ["\u067A"],
+	    "isolated": "\uFB5E",
+	    "final": "\uFB5F",
+	    "initial": "\uFB60",
+	    "medial": "\uFB61"
+	  },
+	  "beeh": {
+	    "normal": ["\u067B"],
+	    "isolated": "\uFB52",
+	    "final": "\uFB53",
+	    "initial": "\uFB54",
+	    "medial": "\uFB55"
+	  },
+	  "peh": {
+	    "normal": ["\u067E"],
+	    "small_meem_above": ["\u08B7"],
+	    "isolated": "\uFB56",
+	    "final": "\uFB57",
+	    "initial": "\uFB58",
+	    "medial": "\uFB59"
+	  },
+	  "teheh": {
+	    "normal": ["\u067F"],
+	    "isolated": "\uFB62",
+	    "final": "\uFB63",
+	    "initial": "\uFB64",
+	    "medial": "\uFB65"
+	  },
+	  "beheh": {
+	    "normal": ["\u0680"],
+	    "isolated": "\uFB5A",
+	    "final": "\uFB5B",
+	    "initial": "\uFB5C",
+	    "medial": "\uFB5D"
+	  },
+	  "nyeh": {
+	    "normal": ["\u0683"],
+	    "isolated": "\uFB76",
+	    "final": "\uFB77",
+	    "initial": "\uFB78",
+	    "medial": "\uFB79"
+	  },
+	  "dyeh": {
+	    "normal": ["\u0684"],
+	    "isolated": "\uFB72",
+	    "final": "\uFB73",
+	    "initial": "\uFB74",
+	    "medial": "\uFB75"
+	  },
+	  "tcheh": {
+	    "normal": ["\u0686"],
+	    "dot_above": ["\u06BF"],
+	    "isolated": "\uFB7A",
+	    "final": "\uFB7B",
+	    "initial": "\uFB7C",
+	    "medial": "\uFB7D"
+	  },
+	  "tcheheh": {
+	    "normal": ["\u0687"],
+	    "isolated": "\uFB7E",
+	    "final": "\uFB7F",
+	    "initial": "\uFB80",
+	    "medial": "\uFB81"
+	  },
+	  "ddal": {
+	    "normal": ["\u0688"],
+	    "isolated": "\uFB88",
+	    "final": "\uFB89"
+	  },
+	  "dahal": {
+	    "normal": ["\u068C"],
+	    "isolated": "\uFB84",
+	    "final": "\uFB85"
+	  },
+	  "ddahal": {
+	    "normal": ["\u068D"],
+	    "isolated": "\uFB82",
+	    "final": "\uFB83"
+	  },
+	  "dul": {
+	    "normal": ["\u068F", "\u068E"],
+	    "isolated": "\uFB86",
+	    "final": "\uFB87"
+	  },
+	  "rreh": {
+	    "normal": ["\u0691"],
+	    "isolated": "\uFB8C",
+	    "final": "\uFB8D"
+	  },
+	  "jeh": {
+	    "normal": ["\u0698"],
+	    "isolated": "\uFB8A",
+	    "final": "\uFB8B"
+	  },
+	  "veh": {
+	    "normal": ["\u06A4"],
+	    "isolated": "\uFB6A",
+	    "final": "\uFB6B",
+	    "initial": "\uFB6C",
+	    "medial": "\uFB6D"
+	  },
+	  "peheh": {
+	    "normal": ["\u06A6"],
+	    "isolated": "\uFB6E",
+	    "final": "\uFB6F",
+	    "initial": "\uFB70",
+	    "medial": "\uFB71"
+	  },
+	  "keheh": {
+	    "normal": ["\u06A9"],
+	    "dot_above": ["\u0762"],
+	    "three_dots_above": ["\u0763"],
+	    "three_dots_pointing_upwards_below": ["\u0764"],
+	    "isolated": "\uFB8E",
+	    "final": "\uFB8F",
+	    "initial": "\uFB90",
+	    "medial": "\uFB91"
+	  },
+	  "ng": {
+	    "normal": ["\u06AD"],
+	    "isolated": "\uFBD3",
+	    "final": "\uFBD4",
+	    "initial": "\uFBD5",
+	    "medial": "\uFBD6"
+	  },
+	  "gaf": {
+	    "normal": ["\u06AF"],
+	    "ring": ["\u06B0"],
+	    "two_dots_below": ["\u06B2"],
+	    "three_dots_above": ["\u06B4"],
+	    "inverted_stroke": ["\u08B0"],
+	    "isolated": "\uFB92",
+	    "final": "\uFB93",
+	    "initial": "\uFB94",
+	    "medial": "\uFB95"
+	  },
+	  "ngoeh": {
+	    "normal": ["\u06B1"],
+	    "isolated": "\uFB9A",
+	    "final": "\uFB9B",
+	    "initial": "\uFB9C",
+	    "medial": "\uFB9D"
+	  },
+	  "gueh": {
+	    "normal": ["\u06B3"],
+	    "isolated": "\uFB96",
+	    "final": "\uFB97",
+	    "initial": "\uFB98",
+	    "medial": "\uFB99"
+	  },
+	  "noon ghunna": {
+	    "normal": ["\u06BA"],
+	    "isolated": "\uFB9E",
+	    "final": "\uFB9F"
+	  },
+	  "rnoon": {
+	    "normal": ["\u06BB"],
+	    "isolated": "\uFBA0",
+	    "final": "\uFBA1",
+	    "initial": "\uFBA2",
+	    "medial": "\uFBA3"
+	  },
+	  "heh doachashmee": {
+	    "normal": ["\u06BE"],
+	    "isolated": "\uFBAA",
+	    "final": "\uFBAB",
+	    "initial": "\uFBAC",
+	    "medial": "\uFBAD"
+	  },
+	  "heh goal": {
+	    "normal": ["\u06C1"],
+	    "hamza_above": ["\u06C1\u0654", "\u06C2"],
+	    "isolated": "\uFBA6",
+	    "final": "\uFBA7",
+	    "initial": "\uFBA8",
+	    "medial": "\uFBA9"
+	  },
+	  "teh marbuta goal": {
+	    "normal": ["\u06C3"]
+	  },
+	  "kirghiz oe": {
+	    "normal": ["\u06C5"],
+	    "isolated": "\uFBE0",
+	    "final": "\uFBE1"
+	  },
+	  "oe": {
+	    "normal": ["\u06C6"],
+	    "isolated": "\uFBD9",
+	    "final": "\uFBDA"
+	  },
+	  "u": {
+	    "normal": ["\u06C7"],
+	    "hamza_above": {
+	      "normal": ["\u0677", "\u06C7\u0674"],
+	      "isolated": "\uFBDD"
+	    },
+	    "isolated": "\uFBD7",
+	    "final": "\uFBD8"
+	  },
+	  "yu": {
+	    "normal": ["\u06C8"],
+	    "isolated": "\uFBDB",
+	    "final": "\uFBDC"
+	  },
+	  "kirghiz yu": {
+	    "normal": ["\u06C9"],
+	    "isolated": "\uFBE2",
+	    "final": "\uFBE3"
+	  },
+	  "ve": {
+	    "normal": ["\u06CB"],
+	    "isolated": "\uFBDE",
+	    "final": "\uFBDF"
+	  },
+	  "farsi yeh": {
+	    "normal": ["\u06CC"],
+	    "indic_two_above": ["\u0775"],
+	    "indic_three_above": ["\u0776"],
+	    "indic_four_above": ["\u0777"],
+	    "isolated": "\uFBFC",
+	    "final": "\uFBFD",
+	    "initial": "\uFBFE",
+	    "medial": "\uFBFF"
+	  },
+	  "e": {
+	    "normal": ["\u06D0"],
+	    "isolated": "\uFBE4",
+	    "final": "\uFBE5",
+	    "initial": "\uFBE6",
+	    "medial": "\uFBE7"
+	  },
+	  "yeh barree": {
+	    "normal": ["\u06D2"],
+	    "hamza_above": {
+	      "normal": ["\u06D2\u0654", "\u06D3"],
+	      "isolated": "\uFBB0",
+	      "final": "\uFBB1"
+	    },
+	    "indic_two_above": ["\u077A"],
+	    "indic_three_above": ["\u077B"],
+	    "isolated": "\uFBAE",
+	    "final": "\uFBAF"
+	  },
+	  "ae": {
+	    "normal": ["\u06D5"],
+	    "isolated": "\u06D5",
+	    "final": "\uFEEA",
+	    "yeh_above": {
+	      "normal": ["\u06C0", "\u06D5\u0654"],
+	      "isolated": "\uFBA4",
+	      "final": "\uFBA5"
 	    }
+	  },
+	  "rohingya yeh": {
+	    "normal": ["\u08AC"]
+	  },
+	  "low alef": {
+	    "normal": ["\u08AD"]
+	  },
+	  "straight waw": {
+	    "normal": ["\u08B1"]
+	  },
+	  "african feh": {
+	    "normal": ["\u08BB"]
+	  },
+	  "african qaf": {
+	    "normal": ["\u08BC"]
+	  },
+	  "african noon": {
+	    "normal": ["\u08BD"]
+	  }
+	};
 
-	    return selection.each(d3_selection_value(value));
-	}
-
-	function utilKeybinding(namespace) {
-	    var _keybindings = {};
-
-
-	    function testBindings(isCapturing) {
-	        var didMatch = false;
-	        var bindings = Object.keys(_keybindings).map(function(id) { return _keybindings[id]; });
-	        var i, binding;
-
-	        // Most key shortcuts will accept either lower or uppercase ('h' or 'H'),
-	        // so we don't strictly match on the shift key, but we prioritize
-	        // shifted keybindings first, and fallback to unshifted only if no match.
-	        // (This lets us differentiate between '←'/'⇧←' or '⌘Z'/'⌘⇧Z')
-
-	        // priority match shifted keybindings first
-	        for (i = 0; i < bindings.length; i++) {
-	            binding = bindings[i];
-	            if (!binding.event.modifiers.shiftKey) { continue; }  // no shift
-	            if (!!binding.capture !== isCapturing) { continue; }
-	            if (matches(binding, true)) {
-	                binding.callback();
-	                didMatch = true;
-	            }
-	        }
+	unicodeArabic["default"] = arabicReference;
 
-	        // then unshifted keybindings
-	        if (didMatch) { return; }
-	        for (i = 0; i < bindings.length; i++) {
-	            binding = bindings[i];
-	            if (binding.event.modifiers.shiftKey) { continue; }   // shift
-	            if (!!binding.capture !== isCapturing) { continue; }
-	            if (matches(binding, false)) {
-	                binding.callback();
-	            }
-	        }
+	var unicodeLigatures = {};
 
+	Object.defineProperty(unicodeLigatures, "__esModule", {
+	  value: true
+	});
+	var ligatureReference = {
+	  "\u0626\u0627": {
+	    "isolated": "\uFBEA",
+	    "final": "\uFBEB"
+	  },
+	  "\u0626\u06D5": {
+	    "isolated": "\uFBEC",
+	    "final": "\uFBED"
+	  },
+	  "\u0626\u0648": {
+	    "isolated": "\uFBEE",
+	    "final": "\uFBEF"
+	  },
+	  "\u0626\u06C7": {
+	    "isolated": "\uFBF0",
+	    "final": "\uFBF1"
+	  },
+	  "\u0626\u06C6": {
+	    "isolated": "\uFBF2",
+	    "final": "\uFBF3"
+	  },
+	  "\u0626\u06C8": {
+	    "isolated": "\uFBF4",
+	    "final": "\uFBF5"
+	  },
+	  "\u0626\u06D0": {
+	    "isolated": "\uFBF6",
+	    "final": "\uFBF7",
+	    "initial": "\uFBF8"
+	  },
+	  "\u0626\u0649": {
+	    "uighur_kirghiz": {
+	      "isolated": "\uFBF9",
+	      "final": "\uFBFA",
+	      "initial": "\uFBFB"
+	    },
+	    "isolated": "\uFC03",
+	    "final": "\uFC68"
+	  },
+	  "\u0626\u062C": {
+	    "isolated": "\uFC00",
+	    "initial": "\uFC97"
+	  },
+	  "\u0626\u062D": {
+	    "isolated": "\uFC01",
+	    "initial": "\uFC98"
+	  },
+	  "\u0626\u0645": {
+	    "isolated": "\uFC02",
+	    "final": "\uFC66",
+	    "initial": "\uFC9A",
+	    "medial": "\uFCDF"
+	  },
+	  "\u0626\u064A": {
+	    "isolated": "\uFC04",
+	    "final": "\uFC69"
+	  },
+	  "\u0628\u062C": {
+	    "isolated": "\uFC05",
+	    "initial": "\uFC9C"
+	  },
+	  "\u0628\u062D": {
+	    "isolated": "\uFC06",
+	    "initial": "\uFC9D"
+	  },
+	  "\u0628\u062E": {
+	    "isolated": "\uFC07",
+	    "initial": "\uFC9E"
+	  },
+	  "\u0628\u0645": {
+	    "isolated": "\uFC08",
+	    "final": "\uFC6C",
+	    "initial": "\uFC9F",
+	    "medial": "\uFCE1"
+	  },
+	  "\u0628\u0649": {
+	    "isolated": "\uFC09",
+	    "final": "\uFC6E"
+	  },
+	  "\u0628\u064A": {
+	    "isolated": "\uFC0A",
+	    "final": "\uFC6F"
+	  },
+	  "\u062A\u062C": {
+	    "isolated": "\uFC0B",
+	    "initial": "\uFCA1"
+	  },
+	  "\u062A\u062D": {
+	    "isolated": "\uFC0C",
+	    "initial": "\uFCA2"
+	  },
+	  "\u062A\u062E": {
+	    "isolated": "\uFC0D",
+	    "initial": "\uFCA3"
+	  },
+	  "\u062A\u0645": {
+	    "isolated": "\uFC0E",
+	    "final": "\uFC72",
+	    "initial": "\uFCA4",
+	    "medial": "\uFCE3"
+	  },
+	  "\u062A\u0649": {
+	    "isolated": "\uFC0F",
+	    "final": "\uFC74"
+	  },
+	  "\u062A\u064A": {
+	    "isolated": "\uFC10",
+	    "final": "\uFC75"
+	  },
+	  "\u062B\u062C": {
+	    "isolated": "\uFC11"
+	  },
+	  "\u062B\u0645": {
+	    "isolated": "\uFC12",
+	    "final": "\uFC78",
+	    "initial": "\uFCA6",
+	    "medial": "\uFCE5"
+	  },
+	  "\u062B\u0649": {
+	    "isolated": "\uFC13",
+	    "final": "\uFC7A"
+	  },
+	  "\u062B\u0648": {
+	    "isolated": "\uFC14"
+	  },
+	  "\u062C\u062D": {
+	    "isolated": "\uFC15",
+	    "initial": "\uFCA7"
+	  },
+	  "\u062C\u0645": {
+	    "isolated": "\uFC16",
+	    "initial": "\uFCA8"
+	  },
+	  "\u062D\u062C": {
+	    "isolated": "\uFC17",
+	    "initial": "\uFCA9"
+	  },
+	  "\u062D\u0645": {
+	    "isolated": "\uFC18",
+	    "initial": "\uFCAA"
+	  },
+	  "\u062E\u062C": {
+	    "isolated": "\uFC19",
+	    "initial": "\uFCAB"
+	  },
+	  "\u062E\u062D": {
+	    "isolated": "\uFC1A"
+	  },
+	  "\u062E\u0645": {
+	    "isolated": "\uFC1B",
+	    "initial": "\uFCAC"
+	  },
+	  "\u0633\u062C": {
+	    "isolated": "\uFC1C",
+	    "initial": "\uFCAD",
+	    "medial": "\uFD34"
+	  },
+	  "\u0633\u062D": {
+	    "isolated": "\uFC1D",
+	    "initial": "\uFCAE",
+	    "medial": "\uFD35"
+	  },
+	  "\u0633\u062E": {
+	    "isolated": "\uFC1E",
+	    "initial": "\uFCAF",
+	    "medial": "\uFD36"
+	  },
+	  "\u0633\u0645": {
+	    "isolated": "\uFC1F",
+	    "initial": "\uFCB0",
+	    "medial": "\uFCE7"
+	  },
+	  "\u0635\u062D": {
+	    "isolated": "\uFC20",
+	    "initial": "\uFCB1"
+	  },
+	  "\u0635\u0645": {
+	    "isolated": "\uFC21",
+	    "initial": "\uFCB3"
+	  },
+	  "\u0636\u062C": {
+	    "isolated": "\uFC22",
+	    "initial": "\uFCB4"
+	  },
+	  "\u0636\u062D": {
+	    "isolated": "\uFC23",
+	    "initial": "\uFCB5"
+	  },
+	  "\u0636\u062E": {
+	    "isolated": "\uFC24",
+	    "initial": "\uFCB6"
+	  },
+	  "\u0636\u0645": {
+	    "isolated": "\uFC25",
+	    "initial": "\uFCB7"
+	  },
+	  "\u0637\u062D": {
+	    "isolated": "\uFC26",
+	    "initial": "\uFCB8"
+	  },
+	  "\u0637\u0645": {
+	    "isolated": "\uFC27",
+	    "initial": "\uFD33",
+	    "medial": "\uFD3A"
+	  },
+	  "\u0638\u0645": {
+	    "isolated": "\uFC28",
+	    "initial": "\uFCB9",
+	    "medial": "\uFD3B"
+	  },
+	  "\u0639\u062C": {
+	    "isolated": "\uFC29",
+	    "initial": "\uFCBA"
+	  },
+	  "\u0639\u0645": {
+	    "isolated": "\uFC2A",
+	    "initial": "\uFCBB"
+	  },
+	  "\u063A\u062C": {
+	    "isolated": "\uFC2B",
+	    "initial": "\uFCBC"
+	  },
+	  "\u063A\u0645": {
+	    "isolated": "\uFC2C",
+	    "initial": "\uFCBD"
+	  },
+	  "\u0641\u062C": {
+	    "isolated": "\uFC2D",
+	    "initial": "\uFCBE"
+	  },
+	  "\u0641\u062D": {
+	    "isolated": "\uFC2E",
+	    "initial": "\uFCBF"
+	  },
+	  "\u0641\u062E": {
+	    "isolated": "\uFC2F",
+	    "initial": "\uFCC0"
+	  },
+	  "\u0641\u0645": {
+	    "isolated": "\uFC30",
+	    "initial": "\uFCC1"
+	  },
+	  "\u0641\u0649": {
+	    "isolated": "\uFC31",
+	    "final": "\uFC7C"
+	  },
+	  "\u0641\u064A": {
+	    "isolated": "\uFC32",
+	    "final": "\uFC7D"
+	  },
+	  "\u0642\u062D": {
+	    "isolated": "\uFC33",
+	    "initial": "\uFCC2"
+	  },
+	  "\u0642\u0645": {
+	    "isolated": "\uFC34",
+	    "initial": "\uFCC3"
+	  },
+	  "\u0642\u0649": {
+	    "isolated": "\uFC35",
+	    "final": "\uFC7E"
+	  },
+	  "\u0642\u064A": {
+	    "isolated": "\uFC36",
+	    "final": "\uFC7F"
+	  },
+	  "\u0643\u0627": {
+	    "isolated": "\uFC37",
+	    "final": "\uFC80"
+	  },
+	  "\u0643\u062C": {
+	    "isolated": "\uFC38",
+	    "initial": "\uFCC4"
+	  },
+	  "\u0643\u062D": {
+	    "isolated": "\uFC39",
+	    "initial": "\uFCC5"
+	  },
+	  "\u0643\u062E": {
+	    "isolated": "\uFC3A",
+	    "initial": "\uFCC6"
+	  },
+	  "\u0643\u0644": {
+	    "isolated": "\uFC3B",
+	    "final": "\uFC81",
+	    "initial": "\uFCC7",
+	    "medial": "\uFCEB"
+	  },
+	  "\u0643\u0645": {
+	    "isolated": "\uFC3C",
+	    "final": "\uFC82",
+	    "initial": "\uFCC8",
+	    "medial": "\uFCEC"
+	  },
+	  "\u0643\u0649": {
+	    "isolated": "\uFC3D",
+	    "final": "\uFC83"
+	  },
+	  "\u0643\u064A": {
+	    "isolated": "\uFC3E",
+	    "final": "\uFC84"
+	  },
+	  "\u0644\u062C": {
+	    "isolated": "\uFC3F",
+	    "initial": "\uFCC9"
+	  },
+	  "\u0644\u062D": {
+	    "isolated": "\uFC40",
+	    "initial": "\uFCCA"
+	  },
+	  "\u0644\u062E": {
+	    "isolated": "\uFC41",
+	    "initial": "\uFCCB"
+	  },
+	  "\u0644\u0645": {
+	    "isolated": "\uFC42",
+	    "final": "\uFC85",
+	    "initial": "\uFCCC",
+	    "medial": "\uFCED"
+	  },
+	  "\u0644\u0649": {
+	    "isolated": "\uFC43",
+	    "final": "\uFC86"
+	  },
+	  "\u0644\u064A": {
+	    "isolated": "\uFC44",
+	    "final": "\uFC87"
+	  },
+	  "\u0645\u062C": {
+	    "isolated": "\uFC45",
+	    "initial": "\uFCCE"
+	  },
+	  "\u0645\u062D": {
+	    "isolated": "\uFC46",
+	    "initial": "\uFCCF"
+	  },
+	  "\u0645\u062E": {
+	    "isolated": "\uFC47",
+	    "initial": "\uFCD0"
+	  },
+	  "\u0645\u0645": {
+	    "isolated": "\uFC48",
+	    "final": "\uFC89",
+	    "initial": "\uFCD1"
+	  },
+	  "\u0645\u0649": {
+	    "isolated": "\uFC49"
+	  },
+	  "\u0645\u064A": {
+	    "isolated": "\uFC4A"
+	  },
+	  "\u0646\u062C": {
+	    "isolated": "\uFC4B",
+	    "initial": "\uFCD2"
+	  },
+	  "\u0646\u062D": {
+	    "isolated": "\uFC4C",
+	    "initial": "\uFCD3"
+	  },
+	  "\u0646\u062E": {
+	    "isolated": "\uFC4D",
+	    "initial": "\uFCD4"
+	  },
+	  "\u0646\u0645": {
+	    "isolated": "\uFC4E",
+	    "final": "\uFC8C",
+	    "initial": "\uFCD5",
+	    "medial": "\uFCEE"
+	  },
+	  "\u0646\u0649": {
+	    "isolated": "\uFC4F",
+	    "final": "\uFC8E"
+	  },
+	  "\u0646\u064A": {
+	    "isolated": "\uFC50",
+	    "final": "\uFC8F"
+	  },
+	  "\u0647\u062C": {
+	    "isolated": "\uFC51",
+	    "initial": "\uFCD7"
+	  },
+	  "\u0647\u0645": {
+	    "isolated": "\uFC52",
+	    "initial": "\uFCD8"
+	  },
+	  "\u0647\u0649": {
+	    "isolated": "\uFC53"
+	  },
+	  "\u0647\u064A": {
+	    "isolated": "\uFC54"
+	  },
+	  "\u064A\u062C": {
+	    "isolated": "\uFC55",
+	    "initial": "\uFCDA"
+	  },
+	  "\u064A\u062D": {
+	    "isolated": "\uFC56",
+	    "initial": "\uFCDB"
+	  },
+	  "\u064A\u062E": {
+	    "isolated": "\uFC57",
+	    "initial": "\uFCDC"
+	  },
+	  "\u064A\u0645": {
+	    "isolated": "\uFC58",
+	    "final": "\uFC93",
+	    "initial": "\uFCDD",
+	    "medial": "\uFCF0"
+	  },
+	  "\u064A\u0649": {
+	    "isolated": "\uFC59",
+	    "final": "\uFC95"
+	  },
+	  "\u064A\u064A": {
+	    "isolated": "\uFC5A",
+	    "final": "\uFC96"
+	  },
+	  "\u0630\u0670": {
+	    "isolated": "\uFC5B"
+	  },
+	  "\u0631\u0670": {
+	    "isolated": "\uFC5C"
+	  },
+	  "\u0649\u0670": {
+	    "isolated": "\uFC5D",
+	    "final": "\uFC90"
+	  },
+	  "\u064C\u0651": {
+	    "isolated": "\uFC5E"
+	  },
+	  "\u064D\u0651": {
+	    "isolated": "\uFC5F"
+	  },
+	  "\u064E\u0651": {
+	    "isolated": "\uFC60"
+	  },
+	  "\u064F\u0651": {
+	    "isolated": "\uFC61"
+	  },
+	  "\u0650\u0651": {
+	    "isolated": "\uFC62"
+	  },
+	  "\u0651\u0670": {
+	    "isolated": "\uFC63"
+	  },
+	  "\u0626\u0631": {
+	    "final": "\uFC64"
+	  },
+	  "\u0626\u0632": {
+	    "final": "\uFC65"
+	  },
+	  "\u0626\u0646": {
+	    "final": "\uFC67"
+	  },
+	  "\u0628\u0631": {
+	    "final": "\uFC6A"
+	  },
+	  "\u0628\u0632": {
+	    "final": "\uFC6B"
+	  },
+	  "\u0628\u0646": {
+	    "final": "\uFC6D"
+	  },
+	  "\u062A\u0631": {
+	    "final": "\uFC70"
+	  },
+	  "\u062A\u0632": {
+	    "final": "\uFC71"
+	  },
+	  "\u062A\u0646": {
+	    "final": "\uFC73"
+	  },
+	  "\u062B\u0631": {
+	    "final": "\uFC76"
+	  },
+	  "\u062B\u0632": {
+	    "final": "\uFC77"
+	  },
+	  "\u062B\u0646": {
+	    "final": "\uFC79"
+	  },
+	  "\u062B\u064A": {
+	    "final": "\uFC7B"
+	  },
+	  "\u0645\u0627": {
+	    "final": "\uFC88"
+	  },
+	  "\u0646\u0631": {
+	    "final": "\uFC8A"
+	  },
+	  "\u0646\u0632": {
+	    "final": "\uFC8B"
+	  },
+	  "\u0646\u0646": {
+	    "final": "\uFC8D"
+	  },
+	  "\u064A\u0631": {
+	    "final": "\uFC91"
+	  },
+	  "\u064A\u0632": {
+	    "final": "\uFC92"
+	  },
+	  "\u064A\u0646": {
+	    "final": "\uFC94"
+	  },
+	  "\u0626\u062E": {
+	    "initial": "\uFC99"
+	  },
+	  "\u0626\u0647": {
+	    "initial": "\uFC9B",
+	    "medial": "\uFCE0"
+	  },
+	  "\u0628\u0647": {
+	    "initial": "\uFCA0",
+	    "medial": "\uFCE2"
+	  },
+	  "\u062A\u0647": {
+	    "initial": "\uFCA5",
+	    "medial": "\uFCE4"
+	  },
+	  "\u0635\u062E": {
+	    "initial": "\uFCB2"
+	  },
+	  "\u0644\u0647": {
+	    "initial": "\uFCCD"
+	  },
+	  "\u0646\u0647": {
+	    "initial": "\uFCD6",
+	    "medial": "\uFCEF"
+	  },
+	  "\u0647\u0670": {
+	    "initial": "\uFCD9"
+	  },
+	  "\u064A\u0647": {
+	    "initial": "\uFCDE",
+	    "medial": "\uFCF1"
+	  },
+	  "\u062B\u0647": {
+	    "medial": "\uFCE6"
+	  },
+	  "\u0633\u0647": {
+	    "medial": "\uFCE8",
+	    "initial": "\uFD31"
+	  },
+	  "\u0634\u0645": {
+	    "medial": "\uFCE9",
+	    "isolated": "\uFD0C",
+	    "final": "\uFD28",
+	    "initial": "\uFD30"
+	  },
+	  "\u0634\u0647": {
+	    "medial": "\uFCEA",
+	    "initial": "\uFD32"
+	  },
+	  "\u0640\u064E\u0651": {
+	    "medial": "\uFCF2"
+	  },
+	  "\u0640\u064F\u0651": {
+	    "medial": "\uFCF3"
+	  },
+	  "\u0640\u0650\u0651": {
+	    "medial": "\uFCF4"
+	  },
+	  "\u0637\u0649": {
+	    "isolated": "\uFCF5",
+	    "final": "\uFD11"
+	  },
+	  "\u0637\u064A": {
+	    "isolated": "\uFCF6",
+	    "final": "\uFD12"
+	  },
+	  "\u0639\u0649": {
+	    "isolated": "\uFCF7",
+	    "final": "\uFD13"
+	  },
+	  "\u0639\u064A": {
+	    "isolated": "\uFCF8",
+	    "final": "\uFD14"
+	  },
+	  "\u063A\u0649": {
+	    "isolated": "\uFCF9",
+	    "final": "\uFD15"
+	  },
+	  "\u063A\u064A": {
+	    "isolated": "\uFCFA",
+	    "final": "\uFD16"
+	  },
+	  "\u0633\u0649": {
+	    "isolated": "\uFCFB"
+	  },
+	  "\u0633\u064A": {
+	    "isolated": "\uFCFC",
+	    "final": "\uFD18"
+	  },
+	  "\u0634\u0649": {
+	    "isolated": "\uFCFD",
+	    "final": "\uFD19"
+	  },
+	  "\u0634\u064A": {
+	    "isolated": "\uFCFE",
+	    "final": "\uFD1A"
+	  },
+	  "\u062D\u0649": {
+	    "isolated": "\uFCFF",
+	    "final": "\uFD1B"
+	  },
+	  "\u062D\u064A": {
+	    "isolated": "\uFD00",
+	    "final": "\uFD1C"
+	  },
+	  "\u062C\u0649": {
+	    "isolated": "\uFD01",
+	    "final": "\uFD1D"
+	  },
+	  "\u062C\u064A": {
+	    "isolated": "\uFD02",
+	    "final": "\uFD1E"
+	  },
+	  "\u062E\u0649": {
+	    "isolated": "\uFD03",
+	    "final": "\uFD1F"
+	  },
+	  "\u062E\u064A": {
+	    "isolated": "\uFD04",
+	    "final": "\uFD20"
+	  },
+	  "\u0635\u0649": {
+	    "isolated": "\uFD05",
+	    "final": "\uFD21"
+	  },
+	  "\u0635\u064A": {
+	    "isolated": "\uFD06",
+	    "final": "\uFD22"
+	  },
+	  "\u0636\u0649": {
+	    "isolated": "\uFD07",
+	    "final": "\uFD23"
+	  },
+	  "\u0636\u064A": {
+	    "isolated": "\uFD08",
+	    "final": "\uFD24"
+	  },
+	  "\u0634\u062C": {
+	    "isolated": "\uFD09",
+	    "final": "\uFD25",
+	    "initial": "\uFD2D",
+	    "medial": "\uFD37"
+	  },
+	  "\u0634\u062D": {
+	    "isolated": "\uFD0A",
+	    "final": "\uFD26",
+	    "initial": "\uFD2E",
+	    "medial": "\uFD38"
+	  },
+	  "\u0634\u062E": {
+	    "isolated": "\uFD0B",
+	    "final": "\uFD27",
+	    "initial": "\uFD2F",
+	    "medial": "\uFD39"
+	  },
+	  "\u0634\u0631": {
+	    "isolated": "\uFD0D",
+	    "final": "\uFD29"
+	  },
+	  "\u0633\u0631": {
+	    "isolated": "\uFD0E",
+	    "final": "\uFD2A"
+	  },
+	  "\u0635\u0631": {
+	    "isolated": "\uFD0F",
+	    "final": "\uFD2B"
+	  },
+	  "\u0636\u0631": {
+	    "isolated": "\uFD10",
+	    "final": "\uFD2C"
+	  },
+	  "\u0633\u0639": {
+	    "final": "\uFD17"
+	  },
+	  "\u062A\u062C\u0645": {
+	    "initial": "\uFD50"
+	  },
+	  "\u062A\u062D\u062C": {
+	    "final": "\uFD51",
+	    "initial": "\uFD52"
+	  },
+	  "\u062A\u062D\u0645": {
+	    "initial": "\uFD53"
+	  },
+	  "\u062A\u062E\u0645": {
+	    "initial": "\uFD54"
+	  },
+	  "\u062A\u0645\u062C": {
+	    "initial": "\uFD55"
+	  },
+	  "\u062A\u0645\u062D": {
+	    "initial": "\uFD56"
+	  },
+	  "\u062A\u0645\u062E": {
+	    "initial": "\uFD57"
+	  },
+	  "\u062C\u0645\u062D": {
+	    "final": "\uFD58",
+	    "initial": "\uFD59"
+	  },
+	  "\u062D\u0645\u064A": {
+	    "final": "\uFD5A"
+	  },
+	  "\u062D\u0645\u0649": {
+	    "final": "\uFD5B"
+	  },
+	  "\u0633\u062D\u062C": {
+	    "initial": "\uFD5C"
+	  },
+	  "\u0633\u062C\u062D": {
+	    "initial": "\uFD5D"
+	  },
+	  "\u0633\u062C\u0649": {
+	    "final": "\uFD5E"
+	  },
+	  "\u0633\u0645\u062D": {
+	    "final": "\uFD5F",
+	    "initial": "\uFD60"
+	  },
+	  "\u0633\u0645\u062C": {
+	    "initial": "\uFD61"
+	  },
+	  "\u0633\u0645\u0645": {
+	    "final": "\uFD62",
+	    "initial": "\uFD63"
+	  },
+	  "\u0635\u062D\u062D": {
+	    "final": "\uFD64",
+	    "initial": "\uFD65"
+	  },
+	  "\u0635\u0645\u0645": {
+	    "final": "\uFD66",
+	    "initial": "\uFDC5"
+	  },
+	  "\u0634\u062D\u0645": {
+	    "final": "\uFD67",
+	    "initial": "\uFD68"
+	  },
+	  "\u0634\u062C\u064A": {
+	    "final": "\uFD69"
+	  },
+	  "\u0634\u0645\u062E": {
+	    "final": "\uFD6A",
+	    "initial": "\uFD6B"
+	  },
+	  "\u0634\u0645\u0645": {
+	    "final": "\uFD6C",
+	    "initial": "\uFD6D"
+	  },
+	  "\u0636\u062D\u0649": {
+	    "final": "\uFD6E"
+	  },
+	  "\u0636\u062E\u0645": {
+	    "final": "\uFD6F",
+	    "initial": "\uFD70"
+	  },
+	  "\u0636\u0645\u062D": {
+	    "final": "\uFD71"
+	  },
+	  "\u0637\u0645\u062D": {
+	    "initial": "\uFD72"
+	  },
+	  "\u0637\u0645\u0645": {
+	    "initial": "\uFD73"
+	  },
+	  "\u0637\u0645\u064A": {
+	    "final": "\uFD74"
+	  },
+	  "\u0639\u062C\u0645": {
+	    "final": "\uFD75",
+	    "initial": "\uFDC4"
+	  },
+	  "\u0639\u0645\u0645": {
+	    "final": "\uFD76",
+	    "initial": "\uFD77"
+	  },
+	  "\u0639\u0645\u0649": {
+	    "final": "\uFD78"
+	  },
+	  "\u063A\u0645\u0645": {
+	    "final": "\uFD79"
+	  },
+	  "\u063A\u0645\u064A": {
+	    "final": "\uFD7A"
+	  },
+	  "\u063A\u0645\u0649": {
+	    "final": "\uFD7B"
+	  },
+	  "\u0641\u062E\u0645": {
+	    "final": "\uFD7C",
+	    "initial": "\uFD7D"
+	  },
+	  "\u0642\u0645\u062D": {
+	    "final": "\uFD7E",
+	    "initial": "\uFDB4"
+	  },
+	  "\u0642\u0645\u0645": {
+	    "final": "\uFD7F"
+	  },
+	  "\u0644\u062D\u0645": {
+	    "final": "\uFD80",
+	    "initial": "\uFDB5"
+	  },
+	  "\u0644\u062D\u064A": {
+	    "final": "\uFD81"
+	  },
+	  "\u0644\u062D\u0649": {
+	    "final": "\uFD82"
+	  },
+	  "\u0644\u062C\u062C": {
+	    "initial": "\uFD83",
+	    "final": "\uFD84"
+	  },
+	  "\u0644\u062E\u0645": {
+	    "final": "\uFD85",
+	    "initial": "\uFD86"
+	  },
+	  "\u0644\u0645\u062D": {
+	    "final": "\uFD87",
+	    "initial": "\uFD88"
+	  },
+	  "\u0645\u062D\u062C": {
+	    "initial": "\uFD89"
+	  },
+	  "\u0645\u062D\u0645": {
+	    "initial": "\uFD8A"
+	  },
+	  "\u0645\u062D\u064A": {
+	    "final": "\uFD8B"
+	  },
+	  "\u0645\u062C\u062D": {
+	    "initial": "\uFD8C"
+	  },
+	  "\u0645\u062C\u0645": {
+	    "initial": "\uFD8D"
+	  },
+	  "\u0645\u062E\u062C": {
+	    "initial": "\uFD8E"
+	  },
+	  "\u0645\u062E\u0645": {
+	    "initial": "\uFD8F"
+	  },
+	  "\u0645\u062C\u062E": {
+	    "initial": "\uFD92"
+	  },
+	  "\u0647\u0645\u062C": {
+	    "initial": "\uFD93"
+	  },
+	  "\u0647\u0645\u0645": {
+	    "initial": "\uFD94"
+	  },
+	  "\u0646\u062D\u0645": {
+	    "initial": "\uFD95"
+	  },
+	  "\u0646\u062D\u0649": {
+	    "final": "\uFD96"
+	  },
+	  "\u0646\u062C\u0645": {
+	    "final": "\uFD97",
+	    "initial": "\uFD98"
+	  },
+	  "\u0646\u062C\u0649": {
+	    "final": "\uFD99"
+	  },
+	  "\u0646\u0645\u064A": {
+	    "final": "\uFD9A"
+	  },
+	  "\u0646\u0645\u0649": {
+	    "final": "\uFD9B"
+	  },
+	  "\u064A\u0645\u0645": {
+	    "final": "\uFD9C",
+	    "initial": "\uFD9D"
+	  },
+	  "\u0628\u062E\u064A": {
+	    "final": "\uFD9E"
+	  },
+	  "\u062A\u062C\u064A": {
+	    "final": "\uFD9F"
+	  },
+	  "\u062A\u062C\u0649": {
+	    "final": "\uFDA0"
+	  },
+	  "\u062A\u062E\u064A": {
+	    "final": "\uFDA1"
+	  },
+	  "\u062A\u062E\u0649": {
+	    "final": "\uFDA2"
+	  },
+	  "\u062A\u0645\u064A": {
+	    "final": "\uFDA3"
+	  },
+	  "\u062A\u0645\u0649": {
+	    "final": "\uFDA4"
+	  },
+	  "\u062C\u0645\u064A": {
+	    "final": "\uFDA5"
+	  },
+	  "\u062C\u062D\u0649": {
+	    "final": "\uFDA6"
+	  },
+	  "\u062C\u0645\u0649": {
+	    "final": "\uFDA7"
+	  },
+	  "\u0633\u062E\u0649": {
+	    "final": "\uFDA8"
+	  },
+	  "\u0635\u062D\u064A": {
+	    "final": "\uFDA9"
+	  },
+	  "\u0634\u062D\u064A": {
+	    "final": "\uFDAA"
+	  },
+	  "\u0636\u062D\u064A": {
+	    "final": "\uFDAB"
+	  },
+	  "\u0644\u062C\u064A": {
+	    "final": "\uFDAC"
+	  },
+	  "\u0644\u0645\u064A": {
+	    "final": "\uFDAD"
+	  },
+	  "\u064A\u062D\u064A": {
+	    "final": "\uFDAE"
+	  },
+	  "\u064A\u062C\u064A": {
+	    "final": "\uFDAF"
+	  },
+	  "\u064A\u0645\u064A": {
+	    "final": "\uFDB0"
+	  },
+	  "\u0645\u0645\u064A": {
+	    "final": "\uFDB1"
+	  },
+	  "\u0642\u0645\u064A": {
+	    "final": "\uFDB2"
+	  },
+	  "\u0646\u062D\u064A": {
+	    "final": "\uFDB3"
+	  },
+	  "\u0639\u0645\u064A": {
+	    "final": "\uFDB6"
+	  },
+	  "\u0643\u0645\u064A": {
+	    "final": "\uFDB7"
+	  },
+	  "\u0646\u062C\u062D": {
+	    "initial": "\uFDB8",
+	    "final": "\uFDBD"
+	  },
+	  "\u0645\u062E\u064A": {
+	    "final": "\uFDB9"
+	  },
+	  "\u0644\u062C\u0645": {
+	    "initial": "\uFDBA",
+	    "final": "\uFDBC"
+	  },
+	  "\u0643\u0645\u0645": {
+	    "final": "\uFDBB",
+	    "initial": "\uFDC3"
+	  },
+	  "\u062C\u062D\u064A": {
+	    "final": "\uFDBE"
+	  },
+	  "\u062D\u062C\u064A": {
+	    "final": "\uFDBF"
+	  },
+	  "\u0645\u062C\u064A": {
+	    "final": "\uFDC0"
+	  },
+	  "\u0641\u0645\u064A": {
+	    "final": "\uFDC1"
+	  },
+	  "\u0628\u062D\u064A": {
+	    "final": "\uFDC2"
+	  },
+	  "\u0633\u062E\u064A": {
+	    "final": "\uFDC6"
+	  },
+	  "\u0646\u062C\u064A": {
+	    "final": "\uFDC7"
+	  },
+	  "\u0644\u0622": {
+	    "isolated": "\uFEF5",
+	    "final": "\uFEF6"
+	  },
+	  "\u0644\u0623": {
+	    "isolated": "\uFEF7",
+	    "final": "\uFEF8"
+	  },
+	  "\u0644\u0625": {
+	    "isolated": "\uFEF9",
+	    "final": "\uFEFA"
+	  },
+	  "\u0644\u0627": {
+	    "isolated": "\uFEFB",
+	    "final": "\uFEFC"
+	  },
+	  "words": {
+	    "\u0635\u0644\u06D2": "\uFDF0",
+	    "\u0642\u0644\u06D2": "\uFDF1",
+	    "\u0627\u0644\u0644\u0647": "\uFDF2",
+	    "\u0627\u0643\u0628\u0631": "\uFDF3",
+	    "\u0645\u062D\u0645\u062F": "\uFDF4",
+	    "\u0635\u0644\u0639\u0645": "\uFDF5",
+	    "\u0631\u0633\u0648\u0644": "\uFDF6",
+	    "\u0639\u0644\u064A\u0647": "\uFDF7",
+	    "\u0648\u0633\u0644\u0645": "\uFDF8",
+	    "\u0635\u0644\u0649": "\uFDF9",
+	    "\u0635\u0644\u0649\u0627\u0644\u0644\u0647\u0639\u0644\u064A\u0647\u0648\u0633\u0644\u0645": "\uFDFA",
+	    "\u062C\u0644\u062C\u0644\u0627\u0644\u0647": "\uFDFB",
+	    "\u0631\u06CC\u0627\u0644": "\uFDFC"
+	  }
+	};
+
+	unicodeLigatures["default"] = ligatureReference;
+
+	Object.defineProperty(reference, "__esModule", {
+	  value: true
+	});
+	var unicode_arabic_1$3 = unicodeArabic;
+	var unicode_ligatures_1$2 = unicodeLigatures;
+	var letterList = Object.keys(unicode_arabic_1$3["default"]);
+	reference.letterList = letterList;
+	var ligatureList = Object.keys(unicode_ligatures_1$2["default"]);
+	reference.ligatureList = ligatureList;
+	var ligatureWordList = Object.keys(unicode_ligatures_1$2["default"].words);
+	reference.ligatureWordList = ligatureWordList;
+	var lams = "\u0644\u06B5\u06B6\u06B7\u06B8";
+	reference.lams = lams;
+	var alefs = "\u0627\u0622\u0623\u0625\u0671\u0672\u0673\u0675\u0773\u0774";
+	reference.alefs = alefs; // for (var l = 1; l < lams.length; l++) {
+	//   console.log('-');
+	//   for (var a = 0; a < alefs.length; a++) {
+	//     console.log(a + ': ' + lams[l] + alefs[a]);
+	//   }
+	// }
 
-	        function matches(binding, testShift) {
-	            var event$1 = event;
-	            var isMatch = false;
-	            var tryKeyCode = true;
+	var tashkeel = "\u0605\u0640\u0670\u0674\u06DF\u06E7\u06E8";
+	reference.tashkeel = tashkeel;
 
-	            // Prefer a match on `KeyboardEvent.key`
-	            if (event$1.key !== undefined) {
-	                tryKeyCode = (event$1.key.charCodeAt(0) > 255);  // outside ISO-Latin-1
-	                isMatch = true;
+	function addToTashkeel(start, finish) {
+	  for (var i = start; i <= finish; i++) {
+	    reference.tashkeel = tashkeel += String.fromCharCode(i);
+	  }
+	}
 
-	                if (binding.event.key === undefined) {
-	                    isMatch = false;
-	                } else if (Array.isArray(binding.event.key)) {
-	                    if (binding.event.key.map(function(s) { return s.toLowerCase(); }).indexOf(event$1.key.toLowerCase()) === -1)
-	                        { isMatch = false; }
-	                } else {
-	                    if (event$1.key.toLowerCase() !== binding.event.key.toLowerCase())
-	                        { isMatch = false; }
-	                }
-	            }
+	addToTashkeel(0x0610, 0x061A);
+	addToTashkeel(0x064B, 0x065F);
+	addToTashkeel(0x06D6, 0x06DC);
+	addToTashkeel(0x06E0, 0x06E4);
+	addToTashkeel(0x06EA, 0x06ED);
+	addToTashkeel(0x08D3, 0x08E1);
+	addToTashkeel(0x08E3, 0x08FF);
+	addToTashkeel(0xFE70, 0xFE7F);
+	var lineBreakers = "\u0627\u0629\u0648\u06C0\u06CF\u06FD\u06FE\u076B\u076C\u0771\u0773\u0774\u0778\u0779\u08E2\u08B1\u08B2\u08B9";
+	reference.lineBreakers = lineBreakers;
 
-	            // Fallback match on `KeyboardEvent.keyCode`, can happen if:
-	            // - browser doesn't support `KeyboardEvent.key`
-	            // - `KeyboardEvent.key` is outside ISO-Latin-1 range (cyrillic?)
-	            if (!isMatch && tryKeyCode) {
-	                isMatch = (event$1.keyCode === binding.event.keyCode);
-	            }
+	function addToLineBreakers(start, finish) {
+	  for (var i = start; i <= finish; i++) {
+	    reference.lineBreakers = lineBreakers += String.fromCharCode(i);
+	  }
+	}
 
-	            if (!isMatch) { return false; }
+	addToLineBreakers(0x0600, 0x061F); // it's OK to include tashkeel in this range as it is ignored
 
-	            // test modifier keys
-	            if (!(event$1.ctrlKey && event$1.altKey)) {  // if both are set, assume AltGr and skip it - #4096
-	                if (event$1.ctrlKey !== binding.event.modifiers.ctrlKey) { return false; }
-	                if (event$1.altKey !== binding.event.modifiers.altKey) { return false; }
-	            }
-	            if (event$1.metaKey !== binding.event.modifiers.metaKey) { return false; }
-	            if (testShift && event$1.shiftKey !== binding.event.modifiers.shiftKey) { return false; }
+	addToLineBreakers(0x0621, 0x0625);
+	addToLineBreakers(0x062F, 0x0632);
+	addToLineBreakers(0x0660, 0x066D); // numerals, math
 
-	            return true;
-	        }
-	    }
+	addToLineBreakers(0x0671, 0x0677);
+	addToLineBreakers(0x0688, 0x0699);
+	addToLineBreakers(0x06C3, 0x06CB);
+	addToLineBreakers(0x06D2, 0x06F9);
+	addToLineBreakers(0x0759, 0x075B);
+	addToLineBreakers(0x08AA, 0x08AE);
+	addToLineBreakers(0xFB50, 0xFDFD); // presentation forms look like they could connect, but never do
+	// Presentation Forms A includes diacritics but they are meant to stand alone
 
+	addToLineBreakers(0xFE80, 0xFEFC); // presentation forms look like they could connect, but never do
+	// numerals, math
 
-	    function capture() {
-	        testBindings(true);
-	    }
+	addToLineBreakers(0x10E60, 0x10E7F);
+	addToLineBreakers(0x1EC70, 0x1ECBF);
+	addToLineBreakers(0x1EE00, 0x1EEFF);
 
+	Object.defineProperty(GlyphSplitter$1, "__esModule", {
+	  value: true
+	});
+	var isArabic_1$6 = isArabic$1;
+	var reference_1$5 = reference;
 
-	    function bubble() {
-	        var tagName = select(event.target).node().tagName;
-	        if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
-	            return;
-	        }
-	        testBindings(false);
+	function GlyphSplitter(word) {
+	  var letters = [];
+	  var lastLetter = '';
+	  word.split('').forEach(function (letter) {
+	    if (isArabic_1$6.isArabic(letter)) {
+	      if (reference_1$5.tashkeel.indexOf(letter) > -1) {
+	        letters[letters.length - 1] += letter;
+	      } else if (lastLetter.length && (reference_1$5.lams.indexOf(lastLetter) === 0 && reference_1$5.alefs.indexOf(letter) > -1 || reference_1$5.lams.indexOf(lastLetter) > 0 && reference_1$5.alefs.indexOf(letter) === 0)) {
+	        // valid LA forms
+	        letters[letters.length - 1] += letter;
+	      } else {
+	        letters.push(letter);
+	      }
+	    } else {
+	      letters.push(letter);
 	    }
 
-
-	    function keybinding(selection) {
-	        selection = selection || select(document);
-	        selection.on('keydown.capture.' + namespace, capture, true);
-	        selection.on('keydown.bubble.' + namespace, bubble, false);
-	        return keybinding;
+	    if (reference_1$5.tashkeel.indexOf(letter) === -1) {
+	      lastLetter = letter;
 	    }
-
-	    // was: keybinding.off()
-	    keybinding.unbind = function(selection) {
-	        _keybindings = [];
-	        selection = selection || select(document);
-	        selection.on('keydown.capture.' + namespace, null);
-	        selection.on('keydown.bubble.' + namespace, null);
-	        return keybinding;
-	    };
-
-
-	    keybinding.clear = function() {
-	        _keybindings = {};
-	        return keybinding;
-	    };
-
-
-	    // Remove one or more keycode bindings.
-	    keybinding.off = function(codes, capture) {
-	        var arr = utilArrayUniq([].concat(codes));
-
-	        for (var i = 0; i < arr.length; i++) {
-	            var id = arr[i] + (capture ? '-capture' : '-bubble');
-	            delete _keybindings[id];
-	        }
-	        return keybinding;
-	    };
-
-
-	    // Add one or more keycode bindings.
-	    keybinding.on = function(codes, callback, capture) {
-	        if (typeof callback !== 'function') {
-	            return keybinding.off(codes, capture);
-	        }
-
-	        var arr = utilArrayUniq([].concat(codes));
-
-	        for (var i = 0; i < arr.length; i++) {
-	            var id = arr[i] + (capture ? '-capture' : '-bubble');
-	            var binding = {
-	                id: id,
-	                capture: capture,
-	                callback: callback,
-	                event: {
-	                    key: undefined,  // preferred
-	                    keyCode: 0,      // fallback
-	                    modifiers: {
-	                        shiftKey: false,
-	                        ctrlKey: false,
-	                        altKey: false,
-	                        metaKey: false
-	                    }
-	                }
-	            };
-
-	            if (_keybindings[id]) {
-	                console.warn('warning: duplicate keybinding for "' + id + '"'); // eslint-disable-line no-console
-	            }
-
-	            _keybindings[id] = binding;
-
-	            var matches = arr[i].toLowerCase().match(/(?:(?:[^+⇧⌃⌥⌘])+|[⇧⌃⌥⌘]|\+\+|^\+$)/g);
-	            for (var j = 0; j < matches.length; j++) {
-	                // Normalise matching errors
-	                if (matches[j] === '++') { matches[j] = '+'; }
-
-	                if (matches[j] in utilKeybinding.modifierCodes) {
-	                    var prop = utilKeybinding.modifierProperties[utilKeybinding.modifierCodes[matches[j]]];
-	                    binding.event.modifiers[prop] = true;
-	                } else {
-	                    binding.event.key = utilKeybinding.keys[matches[j]] || matches[j];
-	                    if (matches[j] in utilKeybinding.keyCodes) {
-	                        binding.event.keyCode = utilKeybinding.keyCodes[matches[j]];
-	                    }
-	                }
-	            }
-	        }
-
-	        return keybinding;
-	    };
-
-
-	    return keybinding;
-	}
-
-
-	/*
-	 * See https://github.com/keithamus/jwerty
-	 */
-
-	utilKeybinding.modifierCodes = {
-	    // Shift key, ⇧
-	    '⇧': 16, shift: 16,
-	    // CTRL key, on Mac: ⌃
-	    '⌃': 17, ctrl: 17,
-	    // ALT key, on Mac: ⌥ (Alt)
-	    '⌥': 18, alt: 18, option: 18,
-	    // META, on Mac: ⌘ (CMD), on Windows (Win), on Linux (Super)
-	    '⌘': 91, meta: 91, cmd: 91, 'super': 91, win: 91
-	};
-
-	utilKeybinding.modifierProperties = {
-	    16: 'shiftKey',
-	    17: 'ctrlKey',
-	    18: 'altKey',
-	    91: 'metaKey'
-	};
-
-	utilKeybinding.keys = {
-	    // Backspace key, on Mac: ⌫ (Backspace)
-	    '⌫': 'Backspace', backspace: 'Backspace',
-	    // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
-	    '⇥': 'Tab', '⇆': 'Tab', tab: 'Tab',
-	    // Return key, ↩
-	    '↩': 'Enter', 'return': 'Enter', enter: 'Enter', '⌅': 'Enter',
-	    // Pause/Break key
-	    'pause': 'Pause', 'pause-break': 'Pause',
-	    // Caps Lock key, ⇪
-	    '⇪': 'CapsLock', caps: 'CapsLock', 'caps-lock': 'CapsLock',
-	    // Escape key, on Mac: ⎋, on Windows: Esc
-	    '⎋': ['Escape', 'Esc'], escape: ['Escape', 'Esc'], esc: ['Escape', 'Esc'],
-	    // Space key
-	    space: [' ', 'Spacebar'],
-	    // Page-Up key, or pgup, on Mac: ↖
-	    '↖': 'PageUp', pgup: 'PageUp', 'page-up': 'PageUp',
-	    // Page-Down key, or pgdown, on Mac: ↘
-	    '↘': 'PageDown', pgdown: 'PageDown', 'page-down': 'PageDown',
-	    // END key, on Mac: ⇟
-	    '⇟': 'End', end: 'End',
-	    // HOME key, on Mac: ⇞
-	    '⇞': 'Home', home: 'Home',
-	    // Insert key, or ins
-	    ins: 'Insert', insert: 'Insert',
-	    // Delete key, on Mac: ⌦ (Delete)
-	    '⌦': ['Delete', 'Del'], del: ['Delete', 'Del'], 'delete': ['Delete', 'Del'],
-	    // Left Arrow Key, or ←
-	    '←': ['ArrowLeft', 'Left'], left: ['ArrowLeft', 'Left'], 'arrow-left': ['ArrowLeft', 'Left'],
-	    // Up Arrow Key, or ↑
-	    '↑': ['ArrowUp', 'Up'], up: ['ArrowUp', 'Up'], 'arrow-up': ['ArrowUp', 'Up'],
-	    // Right Arrow Key, or →
-	    '→': ['ArrowRight', 'Right'], right: ['ArrowRight', 'Right'], 'arrow-right': ['ArrowRight', 'Right'],
-	    // Up Arrow Key, or ↓
-	    '↓': ['ArrowDown', 'Down'], down: ['ArrowDown', 'Down'], 'arrow-down': ['ArrowDown', 'Down'],
-	    // odities, stuff for backward compatibility (browsers and code):
-	    // Num-Multiply, or *
-	    '*': ['*', 'Multiply'], star: ['*', 'Multiply'], asterisk: ['*', 'Multiply'], multiply: ['*', 'Multiply'],
-	    // Num-Plus or +
-	    '+': ['+', 'Add'], 'plus': ['+', 'Add'],
-	    // Num-Subtract, or -
-	    '-': ['-', 'Subtract'], subtract: ['-', 'Subtract'], 'dash': ['-', 'Subtract'],
-	    // Semicolon
-	    semicolon: ';',
-	    // = or equals
-	    equals: '=',
-	    // Comma, or ,
-	    comma: ',',
-	    // Period, or ., or full-stop
-	    period: '.', 'full-stop': '.',
-	    // Slash, or /, or forward-slash
-	    slash: '/', 'forward-slash': '/',
-	    // Tick, or `, or back-quote
-	    tick: '`', 'back-quote': '`',
-	    // Open bracket, or [
-	    'open-bracket': '[',
-	    // Back slash, or \
-	    'back-slash': '\\',
-	    // Close backet, or ]
-	    'close-bracket': ']',
-	    // Apostrophe, or Quote, or '
-	    quote: '\'', apostrophe: '\'',
-	    // NUMPAD 0-9
-	    'num-0': '0',
-	    'num-1': '1',
-	    'num-2': '2',
-	    'num-3': '3',
-	    'num-4': '4',
-	    'num-5': '5',
-	    'num-6': '6',
-	    'num-7': '7',
-	    'num-8': '8',
-	    'num-9': '9',
-	    // F1-F25
-	    f1: 'F1',
-	    f2: 'F2',
-	    f3: 'F3',
-	    f4: 'F4',
-	    f5: 'F5',
-	    f6: 'F6',
-	    f7: 'F7',
-	    f8: 'F8',
-	    f9: 'F9',
-	    f10: 'F10',
-	    f11: 'F11',
-	    f12: 'F12',
-	    f13: 'F13',
-	    f14: 'F14',
-	    f15: 'F15',
-	    f16: 'F16',
-	    f17: 'F17',
-	    f18: 'F18',
-	    f19: 'F19',
-	    f20: 'F20',
-	    f21: 'F21',
-	    f22: 'F22',
-	    f23: 'F23',
-	    f24: 'F24',
-	    f25: 'F25'
-	};
-
-	utilKeybinding.keyCodes = {
-	    // Backspace key, on Mac: ⌫ (Backspace)
-	    '⌫': 8, backspace: 8,
-	    // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
-	    '⇥': 9, '⇆': 9, tab: 9,
-	    // Return key, ↩
-	    '↩': 13, 'return': 13, enter: 13, '⌅': 13,
-	    // Pause/Break key
-	    'pause': 19, 'pause-break': 19,
-	    // Caps Lock key, ⇪
-	    '⇪': 20, caps: 20, 'caps-lock': 20,
-	    // Escape key, on Mac: ⎋, on Windows: Esc
-	    '⎋': 27, escape: 27, esc: 27,
-	    // Space key
-	    space: 32,
-	    // Page-Up key, or pgup, on Mac: ↖
-	    '↖': 33, pgup: 33, 'page-up': 33,
-	    // Page-Down key, or pgdown, on Mac: ↘
-	    '↘': 34, pgdown: 34, 'page-down': 34,
-	    // END key, on Mac: ⇟
-	    '⇟': 35, end: 35,
-	    // HOME key, on Mac: ⇞
-	    '⇞': 36, home: 36,
-	    // Insert key, or ins
-	    ins: 45, insert: 45,
-	    // Delete key, on Mac: ⌦ (Delete)
-	    '⌦': 46, del: 46, 'delete': 46,
-	    // Left Arrow Key, or ←
-	    '←': 37, left: 37, 'arrow-left': 37,
-	    // Up Arrow Key, or ↑
-	    '↑': 38, up: 38, 'arrow-up': 38,
-	    // Right Arrow Key, or →
-	    '→': 39, right: 39, 'arrow-right': 39,
-	    // Up Arrow Key, or ↓
-	    '↓': 40, down: 40, 'arrow-down': 40,
-	    // odities, printing characters that come out wrong:
-	    // Firefox Equals
-	    'ffequals': 61,
-	    // Num-Multiply, or *
-	    '*': 106, star: 106, asterisk: 106, multiply: 106,
-	    // Num-Plus or +
-	    '+': 107, 'plus': 107,
-	    // Num-Subtract, or -
-	    '-': 109, subtract: 109,
-	    // Firefox Plus
-	    'ffplus': 171,
-	    // Firefox Minus
-	    'ffminus': 173,
-	    // Semicolon
-	    ';': 186, semicolon: 186,
-	    // = or equals
-	    '=': 187, 'equals': 187,
-	    // Comma, or ,
-	    ',': 188, comma: 188,
-	    // Dash / Underscore key
-	    'dash': 189,
-	    // Period, or ., or full-stop
-	    '.': 190, period: 190, 'full-stop': 190,
-	    // Slash, or /, or forward-slash
-	    '/': 191, slash: 191, 'forward-slash': 191,
-	    // Tick, or `, or back-quote
-	    '`': 192, tick: 192, 'back-quote': 192,
-	    // Open bracket, or [
-	    '[': 219, 'open-bracket': 219,
-	    // Back slash, or \
-	    '\\': 220, 'back-slash': 220,
-	    // Close backet, or ]
-	    ']': 221, 'close-bracket': 221,
-	    // Apostrophe, or Quote, or '
-	    '\'': 222, quote: 222, apostrophe: 222
-	};
-
-	// NUMPAD 0-9
-	var i$2 = 95, n = 0;
-	while (++i$2 < 106) {
-	    utilKeybinding.keyCodes['num-' + n] = i$2;
-	    ++n;
-	}
-
-	// 0-9
-	i$2 = 47; n = 0;
-	while (++i$2 < 58) {
-	    utilKeybinding.keyCodes[n] = i$2;
-	    ++n;
-	}
-
-	// F1-F25
-	i$2 = 111; n = 1;
-	while (++i$2 < 136) {
-	    utilKeybinding.keyCodes['f' + n] = i$2;
-	    ++n;
+	  });
+	  return letters;
 	}
 
-	// a-z
-	i$2 = 64;
-	while (++i$2 < 91) {
-	    utilKeybinding.keyCodes[String.fromCharCode(i$2).toLowerCase()] = i$2;
-	}
+	GlyphSplitter$1.GlyphSplitter = GlyphSplitter;
 
-	function utilObjectOmit(obj, omitKeys) {
-	    return Object.keys(obj).reduce(function(result, key) {
-	        if (omitKeys.indexOf(key) === -1) {
-	            result[key] = obj[key];  // keep
-	        }
-	        return result;
-	    }, {});
-	}
+	var BaselineSplitter$1 = {};
 
-	// Copies a variable number of methods from source to target.
-	function utilRebind(target, source) {
-	    var arguments$1 = arguments;
+	Object.defineProperty(BaselineSplitter$1, "__esModule", {
+	  value: true
+	});
+	var isArabic_1$5 = isArabic$1;
+	var reference_1$4 = reference;
 
-	    var i = 1, n = arguments.length, method;
-	    while (++i < n) {
-	        target[method = arguments$1[i]] = d3_rebind(target, source, source[method]);
+	function BaselineSplitter(word) {
+	  var letters = [];
+	  var lastLetter = '';
+	  word.split('').forEach(function (letter) {
+	    if (isArabic_1$5.isArabic(letter) && isArabic_1$5.isArabic(lastLetter)) {
+	      if (lastLetter.length && reference_1$4.tashkeel.indexOf(letter) > -1) {
+	        letters[letters.length - 1] += letter;
+	      } else if (reference_1$4.lineBreakers.indexOf(lastLetter) > -1) {
+	        letters.push(letter);
+	      } else {
+	        letters[letters.length - 1] += letter;
+	      }
+	    } else {
+	      letters.push(letter);
 	    }
-	    return target;
-	}
-
-	// Method is assumed to be a standard D3 getter-setter:
-	// If passed with no arguments, gets the value.
-	// If passed with arguments, sets the value and returns the target.
-	function d3_rebind(target, source, method) {
-	    return function() {
-	        var value = method.apply(source, arguments);
-	        return value === source ? target : value;
-	    };
-	}
-
-	// A per-domain session mutex backed by a cookie and dead man's
-	// switch. If the session crashes, the mutex will auto-release
-	// after 5 seconds.
-
-	// This accepts a string and returns an object that complies with utilSessionMutexType
-	function utilSessionMutex(name) {
-	    var mutex = {};
-	    var intervalID;
 
-	    function renew() {
-	        var expires = new Date();
-	        expires.setSeconds(expires.getSeconds() + 5);
-	        document.cookie = name + '=1; expires=' + expires.toUTCString() + '; sameSite=strict';
+	    if (reference_1$4.tashkeel.indexOf(letter) === -1) {
+	      // don't allow tashkeel to hide line break
+	      lastLetter = letter;
 	    }
-
-	    mutex.lock = function () {
-	        if (intervalID) { return true; }
-	        var cookie = document.cookie.replace(new RegExp('(?:(?:^|.*;)\\s*' + name + '\\s*\\=\\s*([^;]*).*$)|^.*$'), '$1');
-	        if (cookie) { return false; }
-	        renew();
-	        intervalID = window.setInterval(renew, 4000);
-	        return true;
-	    };
-
-	    mutex.unlock = function () {
-	        if (!intervalID) { return; }
-	        document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT; sameSite=strict';
-	        clearInterval(intervalID);
-	        intervalID = null;
-	    };
-
-	    mutex.locked = function () {
-	        return !!intervalID;
-	    };
-
-	    return mutex;
+	  });
+	  return letters;
 	}
 
-	function utilTiler() {
-	    var _size = [256, 256];
-	    var _scale = 256;
-	    var _tileSize = 256;
-	    var _zoomExtent = [0, 20];
-	    var _translate = [_size[0] / 2, _size[1] / 2];
-	    var _margin = 0;
-	    var _skipNullIsland = false;
-
-
-	    function clamp(num, min, max) {
-	        return Math.max(min, Math.min(num, max));
-	    }
-
-
-	    function nearNullIsland(tile) {
-	        var x = tile[0];
-	        var y = tile[1];
-	        var z = tile[2];
-	        if (z >= 7) {
-	            var center = Math.pow(2, z - 1);
-	            var width = Math.pow(2, z - 6);
-	            var min = center - (width / 2);
-	            var max = center + (width / 2) - 1;
-	            return x >= min && x <= max && y >= min && y <= max;
-	        }
-	        return false;
-	    }
+	BaselineSplitter$1.BaselineSplitter = BaselineSplitter;
 
+	var Normalization = {};
 
-	    function tiler() {
-	        var z = geoScaleToZoom(_scale / (2 * Math.PI), _tileSize);
-	        var z0 = clamp(Math.round(z), _zoomExtent[0], _zoomExtent[1]);
-	        var tileMin = 0;
-	        var tileMax = Math.pow(2, z0) - 1;
-	        var log2ts = Math.log(_tileSize) * Math.LOG2E;
-	        var k = Math.pow(2, z - z0 + log2ts);
-	        var origin = [
-	            (_translate[0] - _scale / 2) / k,
-	            (_translate[1] - _scale / 2) / k
-	        ];
-
-	        var cols = range$1(
-	            clamp(Math.floor(-origin[0]) - _margin,               tileMin, tileMax + 1),
-	            clamp(Math.ceil(_size[0] / k - origin[0]) + _margin,  tileMin, tileMax + 1)
-	        );
-	        var rows = range$1(
-	            clamp(Math.floor(-origin[1]) - _margin,               tileMin, tileMax + 1),
-	            clamp(Math.ceil(_size[1] / k - origin[1]) + _margin,  tileMin, tileMax + 1)
-	        );
-
-	        var tiles = [];
-	        for (var i = 0; i < rows.length; i++) {
-	            var y = rows[i];
-	            for (var j = 0; j < cols.length; j++) {
-	                var x = cols[j];
-
-	                if (i >= _margin && i <= rows.length - _margin &&
-	                    j >= _margin && j <= cols.length - _margin) {
-	                    tiles.unshift([x, y, z0]);  // tiles in view at beginning
-	                } else {
-	                    tiles.push([x, y, z0]);     // tiles in margin at the end
-	                }
-	            }
-	        }
+	Object.defineProperty(Normalization, "__esModule", {
+	  value: true
+	});
+	var unicode_arabic_1$2 = unicodeArabic;
+	var unicode_ligatures_1$1 = unicodeLigatures;
+	var isArabic_1$4 = isArabic$1;
+	var reference_1$3 = reference;
 
-	        tiles.translate = origin;
-	        tiles.scale = k;
+	function Normal(word, breakPresentationForm) {
+	  // default is to turn initial/isolated/medial/final presentation form to generic
+	  if (typeof breakPresentationForm === 'undefined') {
+	    breakPresentationForm = true;
+	  }
 
-	        return tiles;
+	  var returnable = '';
+	  word.split('').forEach(function (letter) {
+	    if (!isArabic_1$4.isArabic(letter)) {
+	      returnable += letter;
+	      return;
 	    }
 
+	    for (var w = 0; w < reference_1$3.letterList.length; w++) {
+	      // ok so we are checking this potential lettertron
+	      var letterForms = unicode_arabic_1$2["default"][reference_1$3.letterList[w]];
+	      var versions = Object.keys(letterForms);
 
-	    /**
-	     * getTiles() returns an array of tiles that cover the map view
-	     */
-	    tiler.getTiles = function(projection) {
-	        var origin = [
-	            projection.scale() * Math.PI - projection.translate()[0],
-	            projection.scale() * Math.PI - projection.translate()[1]
-	        ];
-
-	        this
-	            .size(projection.clipExtent()[1])
-	            .scale(projection.scale() * 2 * Math.PI)
-	            .translate(projection.translate());
-
-	        var tiles = tiler();
-	        var ts = tiles.scale;
-
-	        return tiles
-	            .map(function(tile) {
-	                if (_skipNullIsland && nearNullIsland(tile)) {
-	                    return false;
-	                }
-	                var x = tile[0] * ts - origin[0];
-	                var y = tile[1] * ts - origin[1];
-	                return {
-	                    id: tile.toString(),
-	                    xyz: tile,
-	                    extent: geoExtent(
-	                        projection.invert([x, y + ts]),
-	                        projection.invert([x + ts, y])
-	                    )
-	                };
-	            }).filter(Boolean);
-	    };
-
+	      for (var v = 0; v < versions.length; v++) {
+	        var localVersion = letterForms[versions[v]];
 
-	    /**
-	     * getGeoJSON() returns a FeatureCollection for debugging tiles
-	     */
-	    tiler.getGeoJSON = function(projection) {
-	        var features = tiler.getTiles(projection).map(function(tile) {
-	            return {
-	                type: 'Feature',
-	                properties: {
-	                    id: tile.id,
-	                    name: tile.id
-	                },
-	                geometry: {
-	                    type: 'Polygon',
-	                    coordinates: [ tile.extent.polygon() ]
-	                }
-	            };
-	        });
+	        if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	          // look at this embedded object
+	          var embeddedForms = Object.keys(localVersion);
 
-	        return {
-	            type: 'FeatureCollection',
-	            features: features
-	        };
-	    };
+	          for (var ef = 0; ef < embeddedForms.length; ef++) {
+	            var form = localVersion[embeddedForms[ef]];
 
+	            if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+	              // match
+	              // console.log('embedded match');
+	              if (form === letter) {
+	                // match exact
+	                if (breakPresentationForm && localVersion['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(embeddedForms[ef]) > -1) {
+	                  // replace presentation form
+	                  // console.log('keeping normal form of the letter');
+	                  if (_typeof(localVersion['normal']) === 'object') {
+	                    returnable += localVersion['normal'][0];
+	                  } else {
+	                    returnable += localVersion['normal'];
+	                  }
 
-	    tiler.tileSize = function(val) {
-	        if (!arguments.length) { return _tileSize; }
-	        _tileSize = val;
-	        return tiler;
-	    };
+	                  return;
+	                } // console.log('keeping this letter');
 
 
-	    tiler.zoomExtent = function(val) {
-	        if (!arguments.length) { return _zoomExtent; }
-	        _zoomExtent = val;
-	        return tiler;
-	    };
+	                returnable += letter;
+	                return;
+	              } else if (_typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+	                // match
+	                returnable += form[0]; // console.log('added the first letter from the same array');
 
+	                return;
+	              }
+	            }
+	          }
+	        } else if (localVersion === letter) {
+	          // match exact
+	          if (breakPresentationForm && letterForms['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(versions[v]) > -1) {
+	            // replace presentation form
+	            // console.log('keeping normal form of the letter');
+	            if (_typeof(letterForms['normal']) === 'object') {
+	              returnable += letterForms['normal'][0];
+	            } else {
+	              returnable += letterForms['normal'];
+	            }
 
-	    tiler.size = function(val) {
-	        if (!arguments.length) { return _size; }
-	        _size = val;
-	        return tiler;
-	    };
+	            return;
+	          } // console.log('keeping this letter');
 
 
-	    tiler.scale = function(val) {
-	        if (!arguments.length) { return _scale; }
-	        _scale = val;
-	        return tiler;
-	    };
+	          returnable += letter;
+	          return;
+	        } else if (_typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+	          // match
+	          returnable += localVersion[0]; // console.log('added the first letter from the same array');
 
+	          return;
+	        }
+	      }
+	    } // try ligatures
 
-	    tiler.translate = function(val) {
-	        if (!arguments.length) { return _translate; }
-	        _translate = val;
-	        return tiler;
-	    };
 
+	    for (var v2 = 0; v2 < reference_1$3.ligatureList.length; v2++) {
+	      var normalForm = reference_1$3.ligatureList[v2];
 
-	    // number to extend the rows/columns beyond those covering the viewport
-	    tiler.margin = function(val) {
-	        if (!arguments.length) { return _margin; }
-	        _margin = +val;
-	        return tiler;
-	    };
+	      if (normalForm !== 'words') {
+	        var ligForms = Object.keys(unicode_ligatures_1$1["default"][normalForm]);
 
+	        for (var f = 0; f < ligForms.length; f++) {
+	          if (unicode_ligatures_1$1["default"][normalForm][ligForms[f]] === letter) {
+	            returnable += normalForm;
+	            return;
+	          }
+	        }
+	      }
+	    } // try words ligatures
 
-	    tiler.skipNullIsland = function(val) {
-	        if (!arguments.length) { return _skipNullIsland; }
-	        _skipNullIsland = val;
-	        return tiler;
-	    };
 
+	    for (var v3 = 0; v3 < reference_1$3.ligatureWordList.length; v3++) {
+	      var _normalForm = reference_1$3.ligatureWordList[v3];
 
-	    return tiler;
-	}
+	      if (unicode_ligatures_1$1["default"].words[_normalForm] === letter) {
+	        returnable += _normalForm;
+	        return;
+	      }
+	    }
 
-	function utilTriggerEvent(target, type) {
-	    target.each(function() {
-	        var evt = document.createEvent('HTMLEvents');
-	        evt.initEvent(type, true, true);
-	        this.dispatchEvent(evt);
-	    });
+	    returnable += letter; // console.log('kept the letter')
+	  });
+	  return returnable;
 	}
 
-	var _mainLocalizer = coreLocalizer(); // singleton
-	var _t = _mainLocalizer.t;
-
-	//
-	// coreLocalizer manages language and locale parameters including translated strings
-	//
-	function coreLocalizer() {
-
-	    var localizer = {};
-
-	    var _dataLanguages = {};
-
-	    // `localeData` is an object containing all _supported_ locale codes -> language info.
-	    // {
-	    // en: { rtl: false, languageNames: {…}, scriptNames: {…} },
-	    // de: { rtl: false, languageNames: {…}, scriptNames: {…} },
-	    // …
-	    // }
-	    var _dataLocales = {};
-
-	    // `localeStrings` is an object containing all _loaded_ locale codes -> string data.
-	    // {
-	    // en: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
-	    // de: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
-	    // …
-	    // }
-	    var _localeStrings = {};
-
-	    // the current locale parameters
-	    var _localeCode = 'en-US';
-	    var _languageCode = 'en';
-	    var _textDirection = 'ltr';
-	    var _usesMetric = false;
-	    var _languageNames = {};
-	    var _scriptNames = {};
-
-	    // getters for the current locale parameters
-	    localizer.localeCode = function () { return _localeCode; };
-	    localizer.languageCode = function () { return _languageCode; };
-	    localizer.textDirection = function () { return _textDirection; };
-	    localizer.usesMetric = function () { return _usesMetric; };
-	    localizer.languageNames = function () { return _languageNames; };
-	    localizer.scriptNames = function () { return _scriptNames; };
-
-
-	    // The client app may want to manually set the locale, regardless of the
-	    // settings provided by the browser
-	    var _preferredLocaleCodes = [];
-	    localizer.preferredLocaleCodes = function(codes) {
-	        if (!arguments.length) { return _preferredLocaleCodes; }
-	        if (typeof codes === 'string') {
-	            // be generous and accept delimited strings as input
-	            _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
-	        } else {
-	            _preferredLocaleCodes = codes;
-	        }
-	        return localizer;
-	    };
-
+	Normalization.Normal = Normal;
 
-	    var _loadPromise;
-
-	    localizer.ensureLoaded = function () {
-
-	        if (_loadPromise) { return _loadPromise; }
-
-	        return _loadPromise = Promise.all([
-	                // load the list of langauges
-	                _mainFileFetcher.get('languages'),
-	                // load the list of supported locales
-	                _mainFileFetcher.get('locales')
-	            ])
-	            .then(function (results) {
-	                _dataLanguages = results[0];
-	                _dataLocales = results[1];
-	            })
-	            .then(function () {
-	                var requestedLocales = (_preferredLocaleCodes || [])
-	                    // list of locales preferred by the browser in priority order
-	                    .concat(utilDetect().browserLocales);
-	                _localeCode = bestSupportedLocale(requestedLocales);
-
-	                return Promise.all([
-	                    // always load the English locale strings as fallbacks
-	                    localizer.loadLocale('en'),
-	                    // load the preferred locale
-	                    localizer.loadLocale(_localeCode)
-	                ]);
-	            })
-	            .then(function () {
-	                updateForCurrentLocale();
-	            })
-	            .catch(function (err) { return console.error(err); });  // eslint-disable-line
-	    };
+	var CharShaper$1 = {};
 
-	    // Returns the best locale from `locales` supported by iD, if any
-	    function bestSupportedLocale(locales) {
-	        var supportedLocales = _dataLocales;
+	Object.defineProperty(CharShaper$1, "__esModule", {
+	  value: true
+	});
+	var unicode_arabic_1$1 = unicodeArabic;
+	var isArabic_1$3 = isArabic$1;
+	var reference_1$2 = reference;
 
-	        var loop = function ( i ) {
-	            var locale = locales[i];
-	            if (locale.includes('-')) { // full locale ('es-ES')
+	function CharShaper(letter, form) {
+	  if (!isArabic_1$3.isArabic(letter)) {
+	    // fail not Arabic
+	    throw new Error('Not Arabic');
+	  }
 
-	                if (supportedLocales[locale]) { return { v: locale }; }
+	  if (letter === "\u0621") {
+	    // hamza alone
+	    return "\u0621";
+	  }
 
-	                // If full locale not supported ('es-FAKE'), fallback to the base ('es')
-	                var langPart = locale.split('-')[0];
-	                if (supportedLocales[langPart]) { return { v: langPart }; }
+	  for (var w = 0; w < reference_1$2.letterList.length; w++) {
+	    // ok so we are checking this potential lettertron
+	    var letterForms = unicode_arabic_1$1["default"][reference_1$2.letterList[w]];
+	    var versions = Object.keys(letterForms);
 
-	            } else { // base locale ('es')
+	    for (var v = 0; v < versions.length; v++) {
+	      var localVersion = letterForms[versions[v]];
 
-	                // prefer a lower-priority full locale with this base ('es' < 'es-ES')
-	                var fullLocale = locales.find(function (locale2, index) {
-	                    return index > i &&
-	                        locale2 !== locale &&
-	                        locale2.split('-')[0] === locale &&
-	                        supportedLocales[locale2];
-	                });
-	                if (fullLocale) { return { v: fullLocale }; }
+	      if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+	        if (versions.indexOf(form) > -1) {
+	          return letterForms[form];
+	        }
+	      } else if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	        // check embedded
+	        var embeddedVersions = Object.keys(localVersion);
 
-	                if (supportedLocales[locale]) { return { v: locale }; }
+	        for (var ev = 0; ev < embeddedVersions.length; ev++) {
+	          if (localVersion[embeddedVersions[ev]] === letter || _typeof(localVersion[embeddedVersions[ev]]) === 'object' && localVersion[embeddedVersions[ev]].indexOf && localVersion[embeddedVersions[ev]].indexOf(letter) > -1) {
+	            if (embeddedVersions.indexOf(form) > -1) {
+	              return localVersion[form];
 	            }
-	        };
-
-	        for (var i in locales) {
-	            var returned = loop( i );
-
-	            if ( returned ) return returned.v;
+	          }
 	        }
-
-	        return null;
+	      }
 	    }
+	  }
+	}
 
-	    function updateForCurrentLocale() {
-	        if (!_localeCode) { return; }
+	CharShaper$1.CharShaper = CharShaper;
 
-	        _languageCode = _localeCode.split('-')[0];
+	var WordShaper$2 = {};
 
-	        var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
+	Object.defineProperty(WordShaper$2, "__esModule", {
+	  value: true
+	});
+	var isArabic_1$2 = isArabic$1;
+	var reference_1$1 = reference;
+	var CharShaper_1$1 = CharShaper$1;
+	var unicode_ligatures_1 = unicodeLigatures;
 
-	        var hash = utilStringQs(window.location.hash);
+	function WordShaper$1(word) {
+	  var state = 'initial';
+	  var output = '';
 
-	        if (hash.rtl === 'true') {
-	            _textDirection = 'rtl';
-	        } else if (hash.rtl === 'false') {
-	            _textDirection = 'ltr';
-	        }  else {
-	            _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
-	        }
+	  for (var w = 0; w < word.length; w++) {
+	    var nextLetter = ' ';
 
-	        _languageNames = currentData && currentData.languageNames;
-	        _scriptNames = currentData && currentData.scriptNames;
+	    for (var nxw = w + 1; nxw < word.length; nxw++) {
+	      if (!isArabic_1$2.isArabic(word[nxw])) {
+	        break;
+	      }
 
-	        _usesMetric = _localeCode.slice(-3).toLowerCase() !== '-us';
+	      if (reference_1$1.tashkeel.indexOf(word[nxw]) === -1) {
+	        nextLetter = word[nxw];
+	        break;
+	      }
 	    }
 
+	    if (!isArabic_1$2.isArabic(word[w]) || isArabic_1$2.isMath(word[w])) {
+	      // space or other non-Arabic
+	      output += word[w];
+	      state = 'initial';
+	    } else if (reference_1$1.tashkeel.indexOf(word[w]) > -1) {
+	      // tashkeel - add without changing state
+	      output += word[w];
+	    } else if (nextLetter === ' ' // last Arabic letter in this word
+	    || reference_1$1.lineBreakers.indexOf(word[w]) > -1) {
+	      // the current letter is known to break lines
+	      output += CharShaper_1$1.CharShaper(word[w], state === 'initial' ? 'isolated' : 'final');
+	      state = 'initial';
+	    } else if (reference_1$1.lams.indexOf(word[w]) > -1 && reference_1$1.alefs.indexOf(nextLetter) > -1) {
+	      // LA letters - advance an additional letter after this
+	      output += unicode_ligatures_1["default"][word[w] + nextLetter][state === 'initial' ? 'isolated' : 'final'];
+
+	      while (word[w] !== nextLetter) {
+	        w++;
+	      }
 
-	    /* Locales */
-	    // Returns a Promise to load the strings for the requested locale
-	    localizer.loadLocale = function (requested) {
-
-	        if (!_dataLocales) {
-	            return Promise.reject('loadLocale called before init');
-	        }
-
-	        var locale = requested;
-
-	        // US English is the default
-	        if (locale.toLowerCase() === 'en-us') { locale = 'en'; }
+	      state = 'initial';
+	    } else {
+	      output += CharShaper_1$1.CharShaper(word[w], state);
+	      state = 'medial';
+	    }
+	  }
 
-	        if (!_dataLocales[locale]) {
-	            return Promise.reject(("Unsupported locale: " + requested));
-	        }
+	  return output;
+	}
 
-	        if (_localeStrings[locale]) {    // already loaded
-	            return Promise.resolve(locale);
-	        }
+	WordShaper$2.WordShaper = WordShaper$1;
 
-	        var fileMap = _mainFileFetcher.fileMap();
-	        var key = "locale_" + locale;
-	        fileMap[key] = "locales/" + locale + ".json";
+	var ParentLetter$1 = {};
 
-	        return _mainFileFetcher.get(key)
-	            .then(function (d) {
-	                _localeStrings[locale] = d[locale];
-	                return locale;
-	            });
-	    };
+	Object.defineProperty(ParentLetter$1, "__esModule", {
+	  value: true
+	});
+	var unicode_arabic_1 = unicodeArabic;
+	var isArabic_1$1 = isArabic$1;
+	var reference_1 = reference;
 
-	    /**
-	    * Given a string identifier, try to find that string in the current
-	    * language, and return it.  This function will be called recursively
-	    * with locale `en` if a string can not be found in the requested language.
-	    *
-	    * @param  {string}   s             string identifier
-	    * @param  {object?}  replacements  token replacements and default string
-	    * @param  {string?}  locale        locale to use (defaults to currentLocale)
-	    * @return {string?}  localized string
-	    */
-	    localizer.t = function(s, replacements, locale) {
-	        locale = locale || _localeCode;
+	function ParentLetter(letter) {
+	  if (!isArabic_1$1.isArabic(letter)) {
+	    throw new Error('Not an Arabic letter');
+	  }
 
-	        // US English is the default
-	        if (locale.toLowerCase() === 'en-us') { locale = 'en'; }
+	  for (var w = 0; w < reference_1.letterList.length; w++) {
+	    // ok so we are checking this potential lettertron
+	    var letterForms = unicode_arabic_1["default"][reference_1.letterList[w]];
+	    var versions = Object.keys(letterForms);
 
-	        var path = s
-	          .split('.')
-	          .map(function (s) { return s.replace(/<TX_DOT>/g, '.'); })
-	          .reverse();
+	    for (var v = 0; v < versions.length; v++) {
+	      var localVersion = letterForms[versions[v]];
 
-	        var result = _localeStrings[locale];
+	      if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	        // look at this embedded object
+	        var embeddedForms = Object.keys(localVersion);
 
-	        while (result !== undefined && path.length) {
-	          result = result[path.pop()];
-	        }
+	        for (var ef = 0; ef < embeddedForms.length; ef++) {
+	          var form = localVersion[embeddedForms[ef]];
 
-	        if (result !== undefined) {
-	          if (replacements) {
-	            for (var k in replacements) {
-	              var token = "{" + k + "}";
-	              var regex = new RegExp(token, 'g');
-	              result = result.replace(regex, replacements[k]);
-	            }
+	          if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+	            // match
+	            return localVersion;
 	          }
-	          return result;
-	        }
-
-	        if (locale !== 'en') {
-	          return localizer.t(s, replacements, 'en');  // fallback - recurse with 'en'
 	        }
+	      } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+	        // match
+	        return letterForms;
+	      }
+	    }
 
-	        if (replacements && 'default' in replacements) {
-	          return replacements.default;      // fallback - replacements.default
-	        }
-
-	        var missing = "Missing " + locale + " translation: " + s;
-	        if (typeof console !== 'undefined') { console.error(missing); }  // eslint-disable-line
-
-	        return missing;
-	    };
+	    return null;
+	  }
+	}
 
-	    localizer.languageName = function (code, options) {
+	ParentLetter$1.ParentLetter = ParentLetter;
 
-	        if (_languageNames[code]) {  // name in locale langauge
-	          // e.g. "German"
-	          return _languageNames[code];
-	        }
+	function GrandparentLetter(letter) {
+	  if (!isArabic_1$1.isArabic(letter)) {
+	    throw new Error('Not an Arabic letter');
+	  }
 
-	        // sometimes we only want the local name
-	        if (options && options.localOnly) { return null; }
+	  for (var w = 0; w < reference_1.letterList.length; w++) {
+	    // ok so we are checking this potential lettertron
+	    var letterForms = unicode_arabic_1["default"][reference_1.letterList[w]];
+	    var versions = Object.keys(letterForms);
 
-	        var langInfo = _dataLanguages[code];
-	        if (langInfo) {
-	          if (langInfo.nativeName) {  // name in native language
-	            // e.g. "Deutsch (de)"
-	            return localizer.t('translate.language_and_code', { language: langInfo.nativeName, code: code });
+	    for (var v = 0; v < versions.length; v++) {
+	      var localVersion = letterForms[versions[v]];
 
-	          } else if (langInfo.base && langInfo.script) {
-	            var base = langInfo.base;   // the code of the langauge this is based on
+	      if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	        // look at this embedded object
+	        var embeddedForms = Object.keys(localVersion);
 
-	            if (_languageNames[base]) {   // base language name in locale langauge
-	              var scriptCode = langInfo.script;
-	              var script = _scriptNames[scriptCode] || scriptCode;
-	              // e.g. "Serbian (Cyrillic)"
-	              return localizer.t('translate.language_and_code', { language: _languageNames[base], code: script });
+	        for (var ef = 0; ef < embeddedForms.length; ef++) {
+	          var form = localVersion[embeddedForms[ef]];
 
-	            } else if (_dataLanguages[base] && _dataLanguages[base].nativeName) {
-	              // e.g. "српски (sr-Cyrl)"
-	              return localizer.t('translate.language_and_code', { language: _dataLanguages[base].nativeName, code: code });
-	            }
+	          if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+	            // match
+	            return letterForms;
 	          }
 	        }
-	        return code;  // if not found, use the code
-	    };
+	      } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+	        // match
+	        return letterForms;
+	      }
+	    }
 
-	    return localizer;
+	    return null;
+	  }
 	}
 
-	//
-	// `presetCollection` is a wrapper around an `Array` of presets `collection`,
-	// and decorated with some extra methods for searching and matching geometry
-	//
-	function presetCollection(collection) {
-	  var MAXRESULTS = 50;
-	  var _this = {};
-	  var _memo = {};
-
-	  _this.collection = collection;
-
-	  _this.item = function (id) {
-	    if (_memo[id]) { return _memo[id]; }
-	    var found = _this.collection.find(function (d) { return d.id === id; });
-	    if (found) { _memo[id] = found; }
-	    return found;
-	  };
-
-	  _this.index = function (id) { return _this.collection.findIndex(function (d) { return d.id === id; }); };
-
-	  _this.matchGeometry = function (geometry) {
-	    return presetCollection(
-	      _this.collection.filter(function (d) { return d.matchGeometry(geometry); })
-	    );
-	  };
-
-	  _this.matchAllGeometry = function (geometries) {
-	    return presetCollection(
-	      _this.collection.filter(function (d) { return d && d.matchAllGeometry(geometries); })
-	    );
-	  };
+	ParentLetter$1.GrandparentLetter = GrandparentLetter;
 
-	  _this.matchAnyGeometry = function (geometries) {
-	    return presetCollection(
-	      _this.collection.filter(function (d) { return geometries.some(function (geom) { return d.matchGeometry(geom); }); })
-	    );
-	  };
+	Object.defineProperty(lib, "__esModule", {
+	  value: true
+	});
+	var isArabic_1 = isArabic$1;
+	lib.isArabic = isArabic_1.isArabic;
+	var GlyphSplitter_1 = GlyphSplitter$1;
+	lib.GlyphSplitter = GlyphSplitter_1.GlyphSplitter;
+	var BaselineSplitter_1 = BaselineSplitter$1;
+	lib.BaselineSplitter = BaselineSplitter_1.BaselineSplitter;
+	var Normalization_1 = Normalization;
+	lib.Normal = Normalization_1.Normal;
+	var CharShaper_1 = CharShaper$1;
+	lib.CharShaper = CharShaper_1.CharShaper;
+	var WordShaper_1 = WordShaper$2;
+	var WordShaper = lib.WordShaper = WordShaper_1.WordShaper;
+	var ParentLetter_1 = ParentLetter$1;
+	lib.ParentLetter = ParentLetter_1.ParentLetter;
+	lib.GrandparentLetter = ParentLetter_1.GrandparentLetter;
 
-	  _this.fallback = function (geometry) {
-	    var id = geometry;
-	    if (id === 'vertex') { id = 'point'; }
-	    return _this.item(id);
-	  };
+	var rtlRegex = /[\u0590-\u05FF\u0600-\u06FF\u0750-\u07BF\u08A0–\u08BF]/;
+	function fixRTLTextForSvg(inputText) {
+	  var ret = '',
+	      rtlBuffer = [];
+	  var arabicRegex = /[\u0600-\u06FF]/g;
+	  var arabicDiacritics = /[\u0610-\u061A\u064B-\u065F\u0670\u06D6-\u06ED]/g;
+	  var arabicMath = /[\u0660-\u066C\u06F0-\u06F9]+/g;
+	  var thaanaVowel = /[\u07A6-\u07B0]/;
+	  var hebrewSign = /[\u0591-\u05bd\u05bf\u05c1-\u05c5\u05c7]/; // Arabic word shaping
 
-	  _this.search = function (value, geometry, countryCode) {
-	    if (!value) { return _this; }
+	  if (arabicRegex.test(inputText)) {
+	    inputText = WordShaper(inputText);
+	  }
 
-	    value = value.toLowerCase().trim();
+	  for (var n = 0; n < inputText.length; n++) {
+	    var c = inputText[n];
 
-	    // match at name beginning or just after a space (e.g. "office" -> match "Law Office")
-	    function leading(a) {
-	      var index = a.indexOf(value);
-	      return index === 0 || a[index - 1] === ' ';
-	    }
+	    if (arabicMath.test(c)) {
+	      // Arabic numbers go LTR
+	      ret += rtlBuffer.reverse().join('');
+	      rtlBuffer = [c];
+	    } else {
+	      if (rtlBuffer.length && arabicMath.test(rtlBuffer[rtlBuffer.length - 1])) {
+	        ret += rtlBuffer.reverse().join('');
+	        rtlBuffer = [];
+	      }
 
-	    // match at name beginning only
-	    function leadingStrict(a) {
-	      var index = a.indexOf(value);
-	      return index === 0;
+	      if ((thaanaVowel.test(c) || hebrewSign.test(c) || arabicDiacritics.test(c)) && rtlBuffer.length) {
+	        rtlBuffer[rtlBuffer.length - 1] += c;
+	      } else if (rtlRegex.test(c) // include Arabic presentation forms
+	      || c.charCodeAt(0) >= 64336 && c.charCodeAt(0) <= 65023 || c.charCodeAt(0) >= 65136 && c.charCodeAt(0) <= 65279) {
+	        rtlBuffer.push(c);
+	      } else if (c === ' ' && rtlBuffer.length) {
+	        // whitespace within RTL text
+	        rtlBuffer = [rtlBuffer.reverse().join('') + ' '];
+	      } else {
+	        // non-RTL character
+	        ret += rtlBuffer.reverse().join('') + c;
+	        rtlBuffer = [];
+	      }
 	    }
+	  }
 
-	    function sortNames(a, b) {
-	      var aCompare = (a.suggestion ? a.originalName : a.name()).toLowerCase();
-	      var bCompare = (b.suggestion ? b.originalName : b.name()).toLowerCase();
-
-	      // priority if search string matches preset name exactly - #4325
-	      if (value === aCompare) { return -1; }
-	      if (value === bCompare) { return 1; }
-
-	      // priority for higher matchScore
-	      var i = b.originalScore - a.originalScore;
-	      if (i !== 0) { return i; }
-
-	      // priority if search string appears earlier in preset name
-	      i = aCompare.indexOf(value) - bCompare.indexOf(value);
-	      if (i !== 0) { return i; }
-
-	      // priority for shorter preset names
-	      return aCompare.length - bCompare.length;
-	    }
+	  ret += rtlBuffer.reverse().join('');
+	  return ret;
+	}
 
-	    var pool = _this.collection;
-	    if (countryCode) {
-	      pool = pool.filter(function (a) {
-	        if (a.countryCodes && a.countryCodes.indexOf(countryCode) === -1) { return false; }
-	        if (a.notCountryCodes && a.notCountryCodes.indexOf(countryCode) !== -1) { return false; }
-	        return true;
-	      });
-	    }
-	    var searchable = pool.filter(function (a) { return a.searchable !== false && a.suggestion !== true; });
-	    var suggestions = pool.filter(function (a) { return a.suggestion === true; });
-
-	    // matches value to preset.name
-	    var leading_name = searchable
-	      .filter(function (a) { return leading(a.name().toLowerCase()); })
-	      .sort(sortNames);
-
-	    // matches value to preset suggestion name (original name is unhyphenated)
-	    var leading_suggestions = suggestions
-	      .filter(function (a) { return leadingStrict(a.originalName.toLowerCase()); })
-	      .sort(sortNames);
-
-	    // matches value to preset.terms values
-	    var leading_terms = searchable
-	      .filter(function (a) { return (a.terms() || []).some(leading); });
-
-	    // matches value to preset.tags values
-	    var leading_tag_values = searchable
-	      .filter(function (a) { return Object.values(a.tags || {}).filter(function (val) { return val !== '*'; }).some(leading); });
-
-	    // finds close matches to value in preset.name
-	    var similar_name = searchable
-	      .map(function (a) { return ({ preset: a, dist: utilEditDistance(value, a.name()) }); })
-	      .filter(function (a) { return a.dist + Math.min(value.length - a.preset.name().length, 0) < 3; })
-	      .sort(function (a, b) { return a.dist - b.dist; })
-	      .map(function (a) { return a.preset; });
-
-	    // finds close matches to value to preset suggestion name (original name is unhyphenated)
-	    var similar_suggestions = suggestions
-	      .map(function (a) { return ({ preset: a, dist: utilEditDistance(value, a.originalName.toLowerCase()) }); })
-	      .filter(function (a) { return a.dist + Math.min(value.length - a.preset.originalName.length, 0) < 1; })
-	      .sort(function (a, b) { return a.dist - b.dist; })
-	      .map(function (a) { return a.preset; });
-
-	    // finds close matches to value in preset.terms
-	    var similar_terms = searchable
-	      .filter(function (a) {
-	        return (a.terms() || []).some(function (b) {
-	          return utilEditDistance(value, b) + Math.min(value.length - b.length, 0) < 3;
-	        });
-	      });
+	var DESCRIPTORS$2 = descriptors;
+	var uncurryThis$b = functionUncurryThis;
+	var objectKeys = objectKeys$4;
+	var toIndexedObject = toIndexedObject$d;
+	var $propertyIsEnumerable = objectPropertyIsEnumerable.f;
 
-	    var results = leading_name.concat(
-	      leading_suggestions,
-	      leading_terms,
-	      leading_tag_values,
-	      similar_name,
-	      similar_suggestions,
-	      similar_terms
-	    ).slice(0, MAXRESULTS - 1);
+	var propertyIsEnumerable = uncurryThis$b($propertyIsEnumerable);
+	var push$2 = uncurryThis$b([].push);
 
-	    if (geometry) {
-	      if (typeof geometry === 'string') {
-	        results.push(_this.fallback(geometry));
-	      } else {
-	        geometry.forEach(function (geom) { return results.push(_this.fallback(geom)); });
+	// `Object.{ entries, values }` methods implementation
+	var createMethod$1 = function (TO_ENTRIES) {
+	  return function (it) {
+	    var O = toIndexedObject(it);
+	    var keys = objectKeys(O);
+	    var length = keys.length;
+	    var i = 0;
+	    var result = [];
+	    var key;
+	    while (length > i) {
+	      key = keys[i++];
+	      if (!DESCRIPTORS$2 || propertyIsEnumerable(O, key)) {
+	        push$2(result, TO_ENTRIES ? [key, O[key]] : O[key]);
 	      }
 	    }
-
-	    return presetCollection(utilArrayUniq(results));
+	    return result;
 	  };
+	};
 
+	var objectToArray = {
+	  // `Object.entries` method
+	  // https://tc39.es/ecma262/#sec-object.entries
+	  entries: createMethod$1(true),
+	  // `Object.values` method
+	  // https://tc39.es/ecma262/#sec-object.values
+	  values: createMethod$1(false)
+	};
 
-	  return _this;
-	}
+	var $$r = _export;
+	var $values = objectToArray.values;
 
-	//
-	// `presetCategory` builds a `presetCollection` of member presets,
-	// decorated with some extra methods for searching and matching geometry
-	//
-	function presetCategory(categoryID, category, all) {
-	  var _this = Object.assign({}, category);   // shallow copy
+	// `Object.values` method
+	// https://tc39.es/ecma262/#sec-object.values
+	$$r({ target: 'Object', stat: true }, {
+	  values: function values(O) {
+	    return $values(O);
+	  }
+	});
 
-	  _this.id = categoryID;
+	// https://github.com/openstreetmap/iD/issues/772
+	// http://mathiasbynens.be/notes/localstorage-pattern#comment-9
+	var _storage;
 
-	  _this.members = presetCollection(
-	    category.members.map(function (presetID) { return all.item(presetID); }).filter(Boolean)
-	  );
+	try {
+	  _storage = localStorage;
+	} catch (e) {} // eslint-disable-line no-empty
 
-	  _this.geometry = _this.members.collection
-	    .reduce(function (acc, preset) {
-	      for (var i in preset.geometry) {
-	        var geometry = preset.geometry[i];
-	        if (acc.indexOf(geometry) === -1) {
-	          acc.push(geometry);
-	        }
-	      }
-	      return acc;
-	    }, []);
 
-	  _this.matchGeometry = function (geom) { return _this.geometry.indexOf(geom) >= 0; };
+	_storage = _storage || function () {
+	  var s = {};
+	  return {
+	    getItem: function getItem(k) {
+	      return s[k];
+	    },
+	    setItem: function setItem(k, v) {
+	      return s[k] = v;
+	    },
+	    removeItem: function removeItem(k) {
+	      return delete s[k];
+	    }
+	  };
+	}();
 
-	  _this.matchAllGeometry = function (geometries) { return _this.members.collection
-	    .some(function (preset) { return preset.matchAllGeometry(geometries); }); };
+	var _listeners = {}; //
+	// corePreferences is an interface for persisting basic key-value strings
+	// within and between iD sessions on the same site.
+	//
 
-	  _this.matchScore = function () { return -1; };
+	/**
+	 * @param {string} k
+	 * @param {string?} v
+	 * @returns {boolean} true if the action succeeded
+	 */
 
-	  _this.name = function () { return _t(("presets.categories." + categoryID + ".name"), { 'default': categoryID }); };
+	function corePreferences(k, v) {
+	  try {
+	    if (v === undefined) return _storage.getItem(k);else if (v === null) _storage.removeItem(k);else _storage.setItem(k, v);
 
-	  _this.terms = function () { return []; };
+	    if (_listeners[k]) {
+	      _listeners[k].forEach(function (handler) {
+	        return handler(v);
+	      });
+	    }
 
+	    return true;
+	  } catch (e) {
+	    /* eslint-disable no-console */
+	    if (typeof console !== 'undefined') {
+	      console.error('localStorage quota exceeded');
+	    }
+	    /* eslint-enable no-console */
 
-	  return _this;
-	}
 
-	//
-	// `presetField` decorates a given `field` Object
-	// with some extra methods for searching and matching geometry
-	//
-	function presetField(fieldID, field) {
-	  var _this = Object.assign({}, field);   // shallow copy
+	    return false;
+	  }
+	} // adds an event listener which is triggered whenever
 
-	  _this.id = fieldID;
 
-	  // for use in classes, element ids, css selectors
-	  _this.safeid = utilSafeClassName(fieldID);
+	corePreferences.onChange = function (k, handler) {
+	  _listeners[k] = _listeners[k] || [];
 
-	  _this.matchGeometry = function (geom) { return !_this.geometry || _this.geometry.indexOf(geom) !== -1; };
+	  _listeners[k].push(handler);
+	};
 
-	  _this.matchAllGeometry = function (geometries) {
-	    return !_this.geometry || geometries.every(function (geom) { return _this.geometry.indexOf(geom) !== -1; });
-	  };
+	var vparse = {exports: {}};
 
-	  _this.t = function (scope, options) { return _t(("presets.fields." + fieldID + "." + scope), options); };
+	(function (module) {
+	  (function (window) {
 
-	  _this.label = function () { return _this.overrideLabel || _this.t('label', { 'default': fieldID }); };
+	    function parseVersion(v) {
+	      var m = v.replace(/[^0-9.]/g, '').match(/[0-9]*\.|[0-9]+/g) || [];
+	      v = {
+	        major: +m[0] || 0,
+	        minor: +m[1] || 0,
+	        patch: +m[2] || 0,
+	        build: +m[3] || 0
+	      };
+	      v.isEmpty = !v.major && !v.minor && !v.patch && !v.build;
+	      v.parsed = [v.major, v.minor, v.patch, v.build];
+	      v.text = v.parsed.join('.');
+	      v.compare = compare;
+	      return v;
+	    }
 
-	  var _placeholder = _this.placeholder;
-	  _this.placeholder = function () { return _this.t('placeholder', { 'default': _placeholder }); };
+	    function compare(v) {
+	      if (typeof v === 'string') {
+	        v = parseVersion(v);
+	      }
 
-	  _this.originalTerms = (_this.terms || []).join();
+	      for (var i = 0; i < 4; i++) {
+	        if (this.parsed[i] !== v.parsed[i]) {
+	          return this.parsed[i] > v.parsed[i] ? 1 : -1;
+	        }
+	      }
 
-	  _this.terms = function () { return _this.t('terms', { 'default': _this.originalTerms })
-	    .toLowerCase().trim().split(/\s*,+\s*/); };
+	      return 0;
+	    }
+	    /* istanbul ignore next */
 
 
-	  return _this;
-	}
+	    if (module && 'object' === 'object') {
+	      module.exports = parseVersion;
+	    } else {
+	      window.parseVersion = parseVersion;
+	    }
+	  })(commonjsGlobal);
+	})(vparse);
+
+	var parseVersion = vparse.exports;
+
+	var name = "iD";
+	var version = "2.20.4";
+	var description = "A friendly editor for OpenStreetMap";
+	var main = "dist/iD.min.js";
+	var repository = "github:openstreetmap/iD";
+	var homepage = "https://github.com/openstreetmap/iD";
+	var bugs = "https://github.com/openstreetmap/iD/issues";
+	var keywords = ["editor","openstreetmap"];
+	var license = "ISC";
+	var scripts = {all:"npm-run-all -s clean build build:legacy dist",build:"npm-run-all -s build:css build:data build:dev","build:css":"node scripts/build_css.js","build:data":"shx mkdir -p dist/data && node scripts/build_data.js","build:dev":"rollup --config config/rollup.config.dev.js","build:legacy":"rollup --config config/rollup.config.legacy.js","build:stats":"rollup --config config/rollup.config.stats.js",clean:"shx rm -f dist/*.js dist/*.map dist/*.css dist/img/*.svg",dist:"npm-run-all -p dist:**","dist:mapillary":"shx mkdir -p dist/mapillary-js && shx cp -R node_modules/mapillary-js/dist/* dist/mapillary-js/","dist:pannellum":"shx mkdir -p dist/pannellum-streetside && shx cp -R node_modules/pannellum/build/* dist/pannellum-streetside/","dist:min:iD":"uglifyjs dist/iD.legacy.js --compress --mangle --output dist/iD.min.js","dist:svg:iD":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"iD-%s\" --symbol-sprite dist/img/iD-sprite.svg \"svg/iD-sprite/**/*.svg\"","dist:svg:community":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"community-%s\" --symbol-sprite dist/img/community-sprite.svg node_modules/osm-community-index/dist/img/*.svg","dist:svg:fa":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/fa-sprite.svg svg/fontawesome/*.svg","dist:svg:maki":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"maki-%s\" --symbol-sprite dist/img/maki-sprite.svg node_modules/@mapbox/maki/icons/*.svg","dist:svg:mapillary:signs":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/mapillary-sprite.svg node_modules/mapillary_sprite_source/package_signs/*.svg","dist:svg:mapillary:objects":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/mapillary-object-sprite.svg node_modules/mapillary_sprite_source/package_objects/*.svg","dist:svg:temaki":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"temaki-%s\" --symbol-sprite dist/img/temaki-sprite.svg node_modules/@ideditor/temaki/icons/*.svg",imagery:"node scripts/update_imagery.js",lint:"eslint scripts test/spec modules","lint:fix":"eslint scripts test/spec modules --fix",start:"npm-run-all -s build start:server",quickstart:"npm-run-all -s build:dev start:server","start:server":"node scripts/server.js",test:"npm-run-all -s lint build test:spec","test:spec":"karma start karma.conf.js",translations:"node scripts/update_locales.js"};
+	var dependencies = {"@ideditor/country-coder":"~5.0.3","@ideditor/location-conflation":"~1.0.2","@mapbox/geojson-area":"^0.2.2","@mapbox/sexagesimal":"1.2.0","@mapbox/vector-tile":"^1.3.1","@tmcw/togeojson":"^4.5.0","@turf/bbox-clip":"^6.0.0","abortcontroller-polyfill":"^1.4.0","aes-js":"^3.1.2","alif-toolkit":"^1.2.9","core-js":"^3.6.5",diacritics:"1.3.0","fast-deep-equal":"~3.1.1","fast-json-stable-stringify":"2.1.0","lodash-es":"~4.17.15",marked:"~2.0.0","node-diff3":"2.1.0","osm-auth":"1.1.0",pannellum:"2.5.6",pbf:"^3.2.1","polygon-clipping":"~0.15.1",rbush:"3.0.1","whatwg-fetch":"^3.4.1","which-polygon":"2.2.0"};
+	var devDependencies = {"@babel/core":"^7.11.6","@babel/preset-env":"^7.11.5","@fortawesome/fontawesome-svg-core":"^1.2.32","@fortawesome/free-brands-svg-icons":"~5.15.1","@fortawesome/free-regular-svg-icons":"~5.15.1","@fortawesome/free-solid-svg-icons":"~5.15.1","@ideditor/temaki":"~5.0.0","@mapbox/maki":"^6.0.0","@rollup/plugin-babel":"^5.2.1","@rollup/plugin-commonjs":"^21.0.0","@rollup/plugin-json":"^4.0.1","@rollup/plugin-node-resolve":"~13.0.5",autoprefixer:"^10.0.1",btoa:"^1.2.1",chai:"^4.3.4","cldr-core":"37.0.0","cldr-localenames-full":"37.0.0",chalk:"^4.1.2","concat-files":"^0.1.1",d3:"~6.6.0","editor-layer-index":"github:osmlab/editor-layer-index#gh-pages",eslint:"^7.1.0","fetch-mock":"^9.11.0",gaze:"^1.1.3",glob:"^7.1.0",happen:"^0.3.2","js-yaml":"^4.0.0","json-stringify-pretty-compact":"^3.0.0",karma:"^6.3.5","karma-chrome-launcher":"^3.1.0","karma-coverage":"^2.0.3","karma-mocha":"^2.0.1","karma-remap-istanbul":"^0.6.0",mapillary_sprite_source:"^1.8.0","mapillary-js":"4.0.0",minimist:"^1.2.3",mocha:"^8.4.0","name-suggestion-index":"~6.0","node-fetch":"^2.6.1","npm-run-all":"^4.0.0","object-inspect":"1.10.3","osm-community-index":"~5.1.0",postcss:"^8.1.1","postcss-selector-prepend":"^0.5.0",rollup:"~2.52.8","rollup-plugin-includepaths":"~0.2.3","rollup-plugin-progress":"^1.1.1","rollup-plugin-visualizer":"~4.2.0",shelljs:"^0.8.0",shx:"^0.3.0",sinon:"^11.1.2","sinon-chai":"^3.7.0",smash:"0.0","static-server":"^2.2.1","svg-sprite":"1.5.1","uglify-js":"~3.13.0",vparse:"~1.1.0"};
+	var engines = {node:">=10"};
+	var browserslist = ["> 0.2%, last 6 major versions, Firefox ESR, IE 11, maintained node versions"];
+	var packageJSON = {
+	name: name,
+	version: version,
+	description: description,
+	main: main,
+	repository: repository,
+	homepage: homepage,
+	bugs: bugs,
+	keywords: keywords,
+	license: license,
+	scripts: scripts,
+	dependencies: dependencies,
+	devDependencies: devDependencies,
+	engines: engines,
+	browserslist: browserslist
+	};
 
+	var _mainFileFetcher = coreFileFetcher(); // singleton
+	// coreFileFetcher asynchronously fetches data from JSON files
 	//
-	// `presetPreset` decorates a given `preset` Object
-	// with some extra methods for searching and matching geometry
-	//
-	function presetPreset(presetID, preset, addable, allFields, allPresets) {
-	  allFields = allFields || {};
-	  allPresets = allPresets || {};
-	  var _this = Object.assign({}, preset);   // shallow copy
-	  var _addable = addable || false;
-	  var _resolvedFields;      // cache
-	  var _resolvedMoreFields;  // cache
 
-	  _this.id = presetID;
-
-	  _this.safeid = utilSafeClassName(presetID);  // for use in css classes, selectors, element ids
-
-	  _this.originalTerms = (_this.terms || []).join();
-
-	  _this.originalName = _this.name || '';
+	function coreFileFetcher() {
+	  var ociVersion = packageJSON.devDependencies['osm-community-index'];
+	  var v = parseVersion(ociVersion);
+	  var vMinor = "".concat(v.major, ".").concat(v.minor);
+	  var _this = {};
+	  var _inflight = {};
+	  var _fileMap = {
+	    'address_formats': 'data/address_formats.min.json',
+	    'deprecated': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/deprecated.min.json',
+	    'discarded': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/discarded.min.json',
+	    'imagery': 'data/imagery.min.json',
+	    'intro_graph': 'data/intro_graph.min.json',
+	    'keepRight': 'data/keepRight.min.json',
+	    'languages': 'data/languages.min.json',
+	    'locales': 'locales/index.min.json',
+	    'oci_defaults': "https://cdn.jsdelivr.net/npm/osm-community-index@".concat(vMinor, "/dist/defaults.min.json"),
+	    'oci_features': "https://cdn.jsdelivr.net/npm/osm-community-index@".concat(vMinor, "/dist/featureCollection.min.json"),
+	    'oci_resources': "https://cdn.jsdelivr.net/npm/osm-community-index@".concat(vMinor, "/dist/resources.min.json"),
+	    'preset_categories': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/preset_categories.min.json',
+	    'preset_defaults': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/preset_defaults.min.json',
+	    'preset_fields': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/fields.min.json',
+	    'preset_presets': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/presets.min.json',
+	    'phone_formats': 'data/phone_formats.min.json',
+	    'qa_data': 'data/qa_data.min.json',
+	    'shortcuts': 'data/shortcuts.min.json',
+	    'territory_languages': 'data/territory_languages.min.json',
+	    'wmf_sitematrix': 'https://cdn.jsdelivr.net/npm/wmf-sitematrix@0.1/wikipedia.min.json'
+	  };
+	  var _cachedData = {}; // expose the cache; useful for tests
 
-	  _this.originalScore = _this.matchScore || 1;
+	  _this.cache = function () {
+	    return _cachedData;
+	  }; // Returns a Promise to fetch data
+	  // (resolved with the data if we have it already)
 
-	  _this.originalReference = _this.reference || {};
 
-	  _this.originalFields = (_this.fields || []);
+	  _this.get = function (which) {
+	    if (_cachedData[which]) {
+	      return Promise.resolve(_cachedData[which]);
+	    }
 
-	  _this.originalMoreFields = (_this.moreFields || []);
+	    var file = _fileMap[which];
 
-	  _this.fields = function () { return _resolvedFields || (_resolvedFields = resolve('fields')); };
+	    var url = file && _this.asset(file);
 
-	  _this.moreFields = function () { return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields')); };
+	    if (!url) {
+	      return Promise.reject("Unknown data file for \"".concat(which, "\""));
+	    }
 
-	  _this.resetFields = function () { return _resolvedFields = _resolvedMoreFields = null; };
+	    var prom = _inflight[url];
 
-	  _this.tags = _this.tags || {};
+	    if (!prom) {
+	      _inflight[url] = prom = fetch(url).then(function (response) {
+	        // fetch in PhantomJS tests may return ok=false and status=0 even if it's okay
+	        if (!response.ok && response.status !== 0 || !response.json) {
+	          throw new Error(response.status + ' ' + response.statusText);
+	        }
 
-	  _this.addTags = _this.addTags || _this.tags;
+	        if (response.status === 204 || response.status === 205) return; // No Content, Reset Content
 
-	  _this.removeTags = _this.removeTags || _this.addTags;
+	        return response.json();
+	      }).then(function (result) {
+	        delete _inflight[url];
 
-	  _this.geometry = (_this.geometry || []);
+	        if (!result) {
+	          throw new Error("No data loaded for \"".concat(which, "\""));
+	        }
 
-	  _this.matchGeometry = function (geom) { return _this.geometry.indexOf(geom) >= 0; };
+	        _cachedData[which] = result;
+	        return result;
+	      })["catch"](function (err) {
+	        delete _inflight[url];
+	        throw err;
+	      });
+	    }
 
-	  _this.matchAllGeometry = function (geoms) { return geoms.every(_this.matchGeometry); };
+	    return prom;
+	  }; // Accessor for the file map
 
-	  _this.matchScore = function (entityTags) {
-	    var tags = _this.tags;
-	    var seen = {};
-	    var score = 0;
 
-	    // match on tags
-	    for (var k in tags) {
-	      seen[k] = true;
-	      if (entityTags[k] === tags[k]) {
-	        score += _this.originalScore;
-	      } else if (tags[k] === '*' && k in entityTags) {
-	        score += _this.originalScore / 2;
-	      } else {
-	        return -1;
-	      }
-	    }
+	  _this.fileMap = function (val) {
+	    if (!arguments.length) return _fileMap;
+	    _fileMap = val;
+	    return _this;
+	  };
 
-	    // boost score for additional matches in addTags - #6802
-	    var addTags = _this.addTags;
-	    for (var k$1 in addTags) {
-	      if (!seen[k$1] && entityTags[k$1] === addTags[k$1]) {
-	        score += _this.originalScore;
-	      }
-	    }
+	  var _assetPath = '';
 
-	    return score;
+	  _this.assetPath = function (val) {
+	    if (!arguments.length) return _assetPath;
+	    _assetPath = val;
+	    return _this;
 	  };
 
+	  var _assetMap = {};
 
-	  var _textCache = {};
-	  _this.t = function (scope, options) {
-	    var textID = "presets.presets." + presetID + "." + scope;
-	    if (_textCache[textID]) { return _textCache[textID]; }
-	    return _textCache[textID] = _t(textID, options);
+	  _this.assetMap = function (val) {
+	    if (!arguments.length) return _assetMap;
+	    _assetMap = val;
+	    return _this;
 	  };
 
-
-	  _this.name = function () {
-	    if (_this.suggestion) {
-	      var path = presetID.split('/');
-	      path.pop();  // remove brand name
-	      // NOTE: insert an en-dash, not a hypen (to avoid conflict with fr - nl names in Brussels etc)
-	      return _this.originalName + ' – ' + _t('presets.presets.' + path.join('/') + '.name');
-	    }
-	    return _this.t('name', { 'default': _this.originalName });
+	  _this.asset = function (val) {
+	    if (/^http(s)?:\/\//i.test(val)) return val;
+	    var filename = _assetPath + val;
+	    return _assetMap[filename] || filename;
 	  };
 
+	  return _this;
+	}
+
+	var global$9 = global$1o;
+	var toIntegerOrInfinity$1 = toIntegerOrInfinity$b;
+	var toString$7 = toString$k;
+	var requireObjectCoercible$6 = requireObjectCoercible$e;
 
-	  _this.terms = function () { return _this.t('terms', { 'default': _this.originalTerms })
-	    .toLowerCase().trim().split(/\s*,+\s*/); };
+	var RangeError$5 = global$9.RangeError;
 
+	// `String.prototype.repeat` method implementation
+	// https://tc39.es/ecma262/#sec-string.prototype.repeat
+	var stringRepeat = function repeat(count) {
+	  var str = toString$7(requireObjectCoercible$6(this));
+	  var result = '';
+	  var n = toIntegerOrInfinity$1(count);
+	  if (n < 0 || n == Infinity) throw RangeError$5('Wrong number of repetitions');
+	  for (;n > 0; (n >>>= 1) && (str += str)) if (n & 1) result += str;
+	  return result;
+	};
 
-	  _this.isFallback = function () {
-	    var tagCount = Object.keys(_this.tags).length;
-	    return tagCount === 0 || (tagCount === 1 && _this.tags.hasOwnProperty('area'));
-	  };
+	var $$q = _export;
+	var global$8 = global$1o;
+	var uncurryThis$a = functionUncurryThis;
+	var toIntegerOrInfinity = toIntegerOrInfinity$b;
+	var thisNumberValue$1 = thisNumberValue$3;
+	var $repeat$1 = stringRepeat;
+	var fails$7 = fails$V;
 
+	var RangeError$4 = global$8.RangeError;
+	var String$1 = global$8.String;
+	var floor$2 = Math.floor;
+	var repeat$2 = uncurryThis$a($repeat$1);
+	var stringSlice$3 = uncurryThis$a(''.slice);
+	var un$ToFixed = uncurryThis$a(1.0.toFixed);
 
-	  _this.addable = function(val) {
-	    if (!arguments.length) { return _addable; }
-	    _addable = val;
-	    return _this;
-	  };
+	var pow$1 = function (x, n, acc) {
+	  return n === 0 ? acc : n % 2 === 1 ? pow$1(x, n - 1, acc * x) : pow$1(x * x, n / 2, acc);
+	};
 
+	var log = function (x) {
+	  var n = 0;
+	  var x2 = x;
+	  while (x2 >= 4096) {
+	    n += 12;
+	    x2 /= 4096;
+	  }
+	  while (x2 >= 2) {
+	    n += 1;
+	    x2 /= 2;
+	  } return n;
+	};
 
-	  _this.reference = function (geom) {
-	    // Lookup documentation on Wikidata...
-	    var qid = _this.tags.wikidata || _this.tags['brand:wikidata'] || _this.tags['operator:wikidata'];
-	    if (qid) {
-	      return { qid: qid };
+	var multiply = function (data, n, c) {
+	  var index = -1;
+	  var c2 = c;
+	  while (++index < 6) {
+	    c2 += n * data[index];
+	    data[index] = c2 % 1e7;
+	    c2 = floor$2(c2 / 1e7);
+	  }
+	};
+
+	var divide = function (data, n) {
+	  var index = 6;
+	  var c = 0;
+	  while (--index >= 0) {
+	    c += data[index];
+	    data[index] = floor$2(c / n);
+	    c = (c % n) * 1e7;
+	  }
+	};
+
+	var dataToString = function (data) {
+	  var index = 6;
+	  var s = '';
+	  while (--index >= 0) {
+	    if (s !== '' || index === 0 || data[index] !== 0) {
+	      var t = String$1(data[index]);
+	      s = s === '' ? t : s + repeat$2('0', 7 - t.length) + t;
 	    }
+	  } return s;
+	};
 
-	    // Lookup documentation on OSM Wikibase...
-	    var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
-	    var value = _this.originalReference.value || _this.tags[key];
+	var FORCED$6 = fails$7(function () {
+	  return un$ToFixed(0.00008, 3) !== '0.000' ||
+	    un$ToFixed(0.9, 0) !== '1' ||
+	    un$ToFixed(1.255, 2) !== '1.25' ||
+	    un$ToFixed(1000000000000000128.0, 0) !== '1000000000000000128';
+	}) || !fails$7(function () {
+	  // V8 ~ Android 4.3-
+	  un$ToFixed({});
+	});
 
-	    if (geom === 'relation' && key === 'type') {
-	      if (value in _this.tags) {
-	        key = value;
-	        value = _this.tags[key];
+	// `Number.prototype.toFixed` method
+	// https://tc39.es/ecma262/#sec-number.prototype.tofixed
+	$$q({ target: 'Number', proto: true, forced: FORCED$6 }, {
+	  toFixed: function toFixed(fractionDigits) {
+	    var number = thisNumberValue$1(this);
+	    var fractDigits = toIntegerOrInfinity(fractionDigits);
+	    var data = [0, 0, 0, 0, 0, 0];
+	    var sign = '';
+	    var result = '0';
+	    var e, z, j, k;
+
+	    // TODO: ES2018 increased the maximum number of fraction digits to 100, need to improve the implementation
+	    if (fractDigits < 0 || fractDigits > 20) throw RangeError$4('Incorrect fraction digits');
+	    // eslint-disable-next-line no-self-compare -- NaN check
+	    if (number != number) return 'NaN';
+	    if (number <= -1e21 || number >= 1e21) return String$1(number);
+	    if (number < 0) {
+	      sign = '-';
+	      number = -number;
+	    }
+	    if (number > 1e-21) {
+	      e = log(number * pow$1(2, 69, 1)) - 69;
+	      z = e < 0 ? number * pow$1(2, -e, 1) : number / pow$1(2, e, 1);
+	      z *= 0x10000000000000;
+	      e = 52 - e;
+	      if (e > 0) {
+	        multiply(data, 0, z);
+	        j = fractDigits;
+	        while (j >= 7) {
+	          multiply(data, 1e7, 0);
+	          j -= 7;
+	        }
+	        multiply(data, pow$1(10, j, 1), 0);
+	        j = e - 1;
+	        while (j >= 23) {
+	          divide(data, 1 << 23);
+	          j -= 23;
+	        }
+	        divide(data, 1 << j);
+	        multiply(data, 1, 1);
+	        divide(data, 2);
+	        result = dataToString(data);
 	      } else {
-	        return { rtype: value };
+	        multiply(data, 0, z);
+	        multiply(data, 1 << -e, 0);
+	        result = dataToString(data) + repeat$2('0', fractDigits);
 	      }
 	    }
-
-	    if (value === '*') {
-	      return { key: key };
+	    if (fractDigits > 0) {
+	      k = result.length;
+	      result = sign + (k <= fractDigits
+	        ? '0.' + repeat$2('0', fractDigits - k) + result
+	        : stringSlice$3(result, 0, k - fractDigits) + '.' + stringSlice$3(result, k - fractDigits));
 	    } else {
-	      return { key: key, value: value };
-	    }
-	  };
+	      result = sign + result;
+	    } return result;
+	  }
+	});
 
+	var global$7 = global$1o;
 
-	  _this.unsetTags = function (tags, geometry, skipFieldDefaults) {
-	    tags = utilObjectOmit(tags, Object.keys(_this.removeTags));
+	var globalIsFinite = global$7.isFinite;
 
-	    if (geometry && !skipFieldDefaults) {
-	      _this.fields().forEach(function (field) {
-	        if (field.matchGeometry(geometry) && field.key && field.default === tags[field.key]) {
-	          delete tags[field.key];
-	        }
-	      });
-	    }
+	// `Number.isFinite` method
+	// https://tc39.es/ecma262/#sec-number.isfinite
+	// eslint-disable-next-line es/no-number-isfinite -- safe
+	var numberIsFinite$1 = Number.isFinite || function isFinite(it) {
+	  return typeof it == 'number' && globalIsFinite(it);
+	};
 
-	    delete tags.area;
-	    return tags;
-	  };
+	var $$p = _export;
+	var numberIsFinite = numberIsFinite$1;
 
+	// `Number.isFinite` method
+	// https://tc39.es/ecma262/#sec-number.isfinite
+	$$p({ target: 'Number', stat: true }, { isFinite: numberIsFinite });
 
-	  _this.setTags = function (tags, geometry, skipFieldDefaults) {
-	    var addTags = _this.addTags;
-	    tags = Object.assign({}, tags);   // shallow copy
+	var $$o = _export;
+	var global$6 = global$1o;
+	var uncurryThis$9 = functionUncurryThis;
+	var toAbsoluteIndex = toAbsoluteIndex$9;
 
-	    for (var k in addTags) {
-	      if (addTags[k] === '*') {
-	        tags[k] = 'yes';
-	      } else {
-	        tags[k] = addTags[k];
-	      }
-	    }
+	var RangeError$3 = global$6.RangeError;
+	var fromCharCode$1 = String.fromCharCode;
+	// eslint-disable-next-line es/no-string-fromcodepoint -- required for testing
+	var $fromCodePoint = String.fromCodePoint;
+	var join$2 = uncurryThis$9([].join);
 
-	    // Add area=yes if necessary.
-	    // This is necessary if the geometry is already an area (e.g. user drew an area) AND any of:
-	    // 1. chosen preset could be either an area or a line (`barrier=city_wall`)
-	    // 2. chosen preset doesn't have a key in osmAreaKeys (`railway=station`)
-	    if (!addTags.hasOwnProperty('area')) {
-	      delete tags.area;
-	      if (geometry === 'area') {
-	        var needsAreaTag = true;
-	        if (_this.geometry.indexOf('line') === -1) {
-	          for (var k$1 in addTags) {
-	            if (k$1 in osmAreaKeys) {
-	              needsAreaTag = false;
-	              break;
-	            }
-	          }
-	        }
-	        if (needsAreaTag) {
-	          tags.area = 'yes';
-	        }
-	      }
-	    }
+	// length should be 1, old FF problem
+	var INCORRECT_LENGTH = !!$fromCodePoint && $fromCodePoint.length != 1;
 
-	    if (geometry && !skipFieldDefaults) {
-	      _this.fields().forEach(function (field) {
-	        if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field.default) {
-	          tags[field.key] = field.default;
-	        }
-	      });
-	    }
+	// `String.fromCodePoint` method
+	// https://tc39.es/ecma262/#sec-string.fromcodepoint
+	$$o({ target: 'String', stat: true, forced: INCORRECT_LENGTH }, {
+	  // eslint-disable-next-line no-unused-vars -- required for `.length`
+	  fromCodePoint: function fromCodePoint(x) {
+	    var elements = [];
+	    var length = arguments.length;
+	    var i = 0;
+	    var code;
+	    while (length > i) {
+	      code = +arguments[i++];
+	      if (toAbsoluteIndex(code, 0x10FFFF) !== code) throw RangeError$3(code + ' is not a valid code point');
+	      elements[i] = code < 0x10000
+	        ? fromCharCode$1(code)
+	        : fromCharCode$1(((code -= 0x10000) >> 10) + 0xD800, code % 0x400 + 0xDC00);
+	    } return join$2(elements, '');
+	  }
+	});
 
-	    return tags;
-	  };
+	var call$1 = functionCall;
+	var fixRegExpWellKnownSymbolLogic = fixRegexpWellKnownSymbolLogic;
+	var anObject = anObject$n;
+	var requireObjectCoercible$5 = requireObjectCoercible$e;
+	var sameValue = sameValue$1;
+	var toString$6 = toString$k;
+	var getMethod = getMethod$7;
+	var regExpExec = regexpExecAbstract;
+
+	// @@search logic
+	fixRegExpWellKnownSymbolLogic('search', function (SEARCH, nativeSearch, maybeCallNative) {
+	  return [
+	    // `String.prototype.search` method
+	    // https://tc39.es/ecma262/#sec-string.prototype.search
+	    function search(regexp) {
+	      var O = requireObjectCoercible$5(this);
+	      var searcher = regexp == undefined ? undefined : getMethod(regexp, SEARCH);
+	      return searcher ? call$1(searcher, regexp, O) : new RegExp(regexp)[SEARCH](toString$6(O));
+	    },
+	    // `RegExp.prototype[@@search]` method
+	    // https://tc39.es/ecma262/#sec-regexp.prototype-@@search
+	    function (string) {
+	      var rx = anObject(this);
+	      var S = toString$6(string);
+	      var res = maybeCallNative(nativeSearch, rx, S);
+
+	      if (res.done) return res.value;
+
+	      var previousLastIndex = rx.lastIndex;
+	      if (!sameValue(previousLastIndex, 0)) rx.lastIndex = 0;
+	      var result = regExpExec(rx, S);
+	      if (!sameValue(rx.lastIndex, previousLastIndex)) rx.lastIndex = previousLastIndex;
+	      return result === null ? -1 : result.index;
+	    }
+	  ];
+	});
 
+	var rbush$2 = {exports: {}};
 
-	  // For a preset without fields, use the fields of the parent preset.
-	  // Replace {preset} placeholders with the fields of the specified presets.
-	  function resolve(which) {
-	    var fieldIDs = (which === 'fields' ? _this.originalFields : _this.originalMoreFields);
-	    var resolved = [];
+	var quickselect$2 = {exports: {}};
 
-	    fieldIDs.forEach(function (fieldID) {
-	      var match = fieldID.match(/\{(.*)\}/);
-	      if (match !== null) {    // a presetID wrapped in braces {}
-	        resolved = resolved.concat(inheritFields(match[1], which));
-	      } else if (allFields[fieldID]) {    // a normal fieldID
-	        resolved.push(allFields[fieldID]);
-	      } else {
-	        console.log(("Cannot resolve \"" + fieldID + "\" found in " + (_this.id) + "." + which));  // eslint-disable-line no-console
-	      }
-	    });
+	(function (module, exports) {
+	  (function (global, factory) {
+	    module.exports = factory() ;
+	  })(commonjsGlobal, function () {
 
-	    // no fields resolved, so use the parent's if possible
-	    if (!resolved.length) {
-	      var endIndex = _this.id.lastIndexOf('/');
-	      var parentID = endIndex && _this.id.substring(0, endIndex);
-	      if (parentID) {
-	        resolved = inheritFields(parentID, which);
-	      }
+	    function quickselect(arr, k, left, right, compare) {
+	      quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
 	    }
 
-	    return utilArrayUniq(resolved);
-
+	    function quickselectStep(arr, k, left, right, compare) {
+	      while (right > left) {
+	        if (right - left > 600) {
+	          var n = right - left + 1;
+	          var m = k - left + 1;
+	          var z = Math.log(n);
+	          var s = 0.5 * Math.exp(2 * z / 3);
+	          var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
+	          var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
+	          var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
+	          quickselectStep(arr, k, newLeft, newRight, compare);
+	        }
 
-	    // returns an array of fields to inherit from the given presetID, if found
-	    function inheritFields(presetID, which) {
-	      var parent = allPresets[presetID];
-	      if (!parent) { return []; }
+	        var t = arr[k];
+	        var i = left;
+	        var j = right;
+	        swap(arr, left, k);
+	        if (compare(arr[right], t) > 0) swap(arr, left, right);
 
-	      if (which === 'fields') {
-	        return parent.fields().filter(shouldInherit);
-	      } else if (which === 'moreFields') {
-	        return parent.moreFields();
-	      } else {
-	        return [];
-	      }
-	    }
+	        while (i < j) {
+	          swap(arr, i, j);
+	          i++;
+	          j--;
 
+	          while (compare(arr[i], t) < 0) {
+	            i++;
+	          }
 
-	    // Skip `fields` for the keys which define the preset.
-	    // These are usually `typeCombo` fields like `shop=*`
-	    function shouldInherit(f) {
-	      if (f.key && _this.tags[f.key] !== undefined &&
-	        // inherit anyway if multiple values are allowed or just a checkbox
-	        f.type !== 'multiCombo' && f.type !== 'semiCombo' && f.type !== 'check'
-	      ) { return false; }
+	          while (compare(arr[j], t) > 0) {
+	            j--;
+	          }
+	        }
 
-	      return true;
+	        if (compare(arr[left], t) === 0) swap(arr, left, j);else {
+	          j++;
+	          swap(arr, j, right);
+	        }
+	        if (j <= k) left = j + 1;
+	        if (k <= j) right = j - 1;
+	      }
 	    }
-	  }
 
+	    function swap(arr, i, j) {
+	      var tmp = arr[i];
+	      arr[i] = arr[j];
+	      arr[j] = tmp;
+	    }
 
-	  return _this;
-	}
+	    function defaultCompare(a, b) {
+	      return a < b ? -1 : a > b ? 1 : 0;
+	    }
 
-	var _mainPresetIndex = presetIndex(); // singleton
+	    return quickselect;
+	  });
+	})(quickselect$2);
 
-	//
-	// `presetIndex` wraps a `presetCollection`
-	// with methods for loading new data and returning defaults
-	//
-	function presetIndex() {
-	  var dispatch$1 = dispatch('favoritePreset', 'recentsChange');
-	  var MAXRECENTS = 30;
+	rbush$2.exports = rbush$1;
 
-	  // seed the preset lists with geometry fallbacks
-	  var POINT = presetPreset('point', { name: 'Point', tags: {}, geometry: ['point', 'vertex'], matchScore: 0.1 } );
-	  var LINE = presetPreset('line', { name: 'Line', tags: {}, geometry: ['line'], matchScore: 0.1 } );
-	  var AREA = presetPreset('area', { name: 'Area', tags: { area: 'yes' }, geometry: ['area'], matchScore: 0.1 } );
-	  var RELATION = presetPreset('relation', { name: 'Relation', tags: {}, geometry: ['relation'], matchScore: 0.1 } );
+	rbush$2.exports["default"] = rbush$1;
 
-	  var _this = presetCollection([POINT, LINE, AREA, RELATION]);
-	  var _presets = { point: POINT, line: LINE, area: AREA, relation: RELATION };
+	var quickselect$1 = quickselect$2.exports;
 
-	  var _defaults = {
-	    point: presetCollection([POINT]),
-	    vertex: presetCollection([POINT]),
-	    line: presetCollection([LINE]),
-	    area: presetCollection([AREA]),
-	    relation: presetCollection([RELATION])
-	  };
+	function rbush$1(maxEntries, format) {
+	  if (!(this instanceof rbush$1)) return new rbush$1(maxEntries, format); // max entries in a node is 9 by default; min node fill is 40% for best performance
 
-	  var _fields = {};
-	  var _categories = {};
-	  var _universal = [];
-	  var _addablePresetIDs = null;   // Set of preset IDs that the user can add
-	  var _recents;
-	  var _favorites;
+	  this._maxEntries = Math.max(4, maxEntries || 9);
+	  this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
 
-	  // Index of presets by (geometry, tag key).
-	  var _geometryIndex = { point: {}, vertex: {}, line: {}, area: {}, relation: {} };
+	  if (format) {
+	    this._initFormat(format);
+	  }
 
-	  var _loadPromise;
+	  this.clear();
+	}
 
-	  _this.ensureLoaded = function () {
-	    if (_loadPromise) { return _loadPromise; }
-
-	    return _loadPromise = Promise.all([
-	        _mainFileFetcher.get('preset_categories'),
-	        _mainFileFetcher.get('preset_defaults'),
-	        _mainFileFetcher.get('preset_presets'),
-	        _mainFileFetcher.get('preset_fields')
-	      ])
-	      .then(function (vals) {
-	        _this.merge({
-	          categories: vals[0],
-	          defaults: vals[1],
-	          presets: vals[2],
-	          fields: vals[3]
-	        });
-	        osmSetAreaKeys(_this.areaKeys());
-	        osmSetPointTags(_this.pointTags());
-	        osmSetVertexTags(_this.vertexTags());
-	      });
-	  };
+	rbush$1.prototype = {
+	  all: function all() {
+	    return this._all(this.data, []);
+	  },
+	  search: function search(bbox) {
+	    var node = this.data,
+	        result = [],
+	        toBBox = this.toBBox;
+	    if (!intersects$1(bbox, node)) return result;
+	    var nodesToSearch = [],
+	        i,
+	        len,
+	        child,
+	        childBBox;
 
+	    while (node) {
+	      for (i = 0, len = node.children.length; i < len; i++) {
+	        child = node.children[i];
+	        childBBox = node.leaf ? toBBox(child) : child;
 
-	  _this.merge = function (d) {
-	    // Merge Fields
-	    if (d.fields) {
-	      Object.keys(d.fields).forEach(function (fieldID) {
-	        var f = d.fields[fieldID];
-	        if (f) {   // add or replace
-	          _fields[fieldID] = presetField(fieldID, f);
-	        } else {   // remove
-	          delete _fields[fieldID];
+	        if (intersects$1(bbox, childBBox)) {
+	          if (node.leaf) result.push(child);else if (contains$1(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
 	        }
-	      });
-	    }
+	      }
 
-	    // Merge Presets
-	    if (d.presets) {
-	      Object.keys(d.presets).forEach(function (presetID) {
-	        var p = d.presets[presetID];
-	        if (p) {   // add or replace
-	          var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);
-	          _presets[presetID] = presetPreset(presetID, p, isAddable, _fields, _presets);
-	        } else {   // remove (but not if it's a fallback)
-	          var existing = _presets[presetID];
-	          if (existing && !existing.isFallback()) {
-	            delete _presets[presetID];
-	          }
-	        }
-	      });
+	      node = nodesToSearch.pop();
 	    }
 
-	    // Need to rebuild _this.collection before loading categories
-	    _this.collection = Object.values(_presets).concat(Object.values(_categories));
-
-	    // Merge Categories
-	    if (d.categories) {
-	      Object.keys(d.categories).forEach(function (categoryID) {
-	        var c = d.categories[categoryID];
-	        if (c) {   // add or replace
-	          _categories[categoryID] = presetCategory(categoryID, c, _this);
-	        } else {   // remove
-	          delete _categories[categoryID];
-	        }
-	      });
-	    }
+	    return result;
+	  },
+	  collides: function collides(bbox) {
+	    var node = this.data,
+	        toBBox = this.toBBox;
+	    if (!intersects$1(bbox, node)) return false;
+	    var nodesToSearch = [],
+	        i,
+	        len,
+	        child,
+	        childBBox;
 
-	    // Rebuild _this.collection after loading categories
-	    _this.collection = Object.values(_presets).concat(Object.values(_categories));
+	    while (node) {
+	      for (i = 0, len = node.children.length; i < len; i++) {
+	        child = node.children[i];
+	        childBBox = node.leaf ? toBBox(child) : child;
 
-	    // Merge Defaults
-	    if (d.defaults) {
-	      Object.keys(d.defaults).forEach(function (geometry) {
-	        var def = d.defaults[geometry];
-	        if (Array.isArray(def)) {   // add or replace
-	          _defaults[geometry] = presetCollection(
-	            def.map(function (id) { return _presets[id] || _categories[id]; }).filter(Boolean)
-	          );
-	        } else {   // remove
-	          delete _defaults[geometry];
+	        if (intersects$1(bbox, childBBox)) {
+	          if (node.leaf || contains$1(bbox, childBBox)) return true;
+	          nodesToSearch.push(child);
 	        }
-	      });
+	      }
+
+	      node = nodesToSearch.pop();
 	    }
 
-	    // Rebuild universal fields array
-	    _universal = Object.values(_fields).filter(function (field) { return field.universal; });
+	    return false;
+	  },
+	  load: function load(data) {
+	    if (!(data && data.length)) return this;
 
-	    // Reset all the preset fields - they'll need to be resolved again
-	    Object.values(_presets).forEach(function (preset) { return preset.resetFields(); });
+	    if (data.length < this._minEntries) {
+	      for (var i = 0, len = data.length; i < len; i++) {
+	        this.insert(data[i]);
+	      }
 
-	    // Rebuild geometry index
-	    _geometryIndex = { point: {}, vertex: {}, line: {}, area: {}, relation: {} };
-	    _this.collection.forEach(function (preset) {
-	      (preset.geometry || []).forEach(function (geometry) {
-	        var g = _geometryIndex[geometry];
-	        for (var key in preset.tags) {
-	          (g[key] = g[key] || []).push(preset);
-	        }
-	      });
-	    });
+	      return this;
+	    } // recursively build the tree with the given data from scratch using OMT algorithm
 
-	    return _this;
-	  };
 
+	    var node = this._build(data.slice(), 0, data.length - 1, 0);
 
-	  _this.match = function (entity, resolver) {
-	    return resolver.transient(entity, 'presetMatch', function () {
-	      var geometry = entity.geometry(resolver);
-	      // Treat entities on addr:interpolation lines as points, not vertices - #3241
-	      if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
-	        geometry = 'point';
-	      }
-	      return _this.matchTags(entity.tags, geometry);
-	    });
-	  };
+	    if (!this.data.children.length) {
+	      // save as is if tree is empty
+	      this.data = node;
+	    } else if (this.data.height === node.height) {
+	      // split root if trees have the same height
+	      this._splitRoot(this.data, node);
+	    } else {
+	      if (this.data.height < node.height) {
+	        // swap trees if inserted one is bigger
+	        var tmpNode = this.data;
+	        this.data = node;
+	        node = tmpNode;
+	      } // insert the small tree into the large tree at appropriate level
 
 
-	  _this.matchTags = function (tags, geometry) {
-	    var geometryMatches = _geometryIndex[geometry];
-	    var address;
-	    var best = -1;
-	    var match;
+	      this._insert(node, this.data.height - node.height - 1, true);
+	    }
 
-	    for (var k in tags) {
-	      // If any part of an address is present, allow fallback to "Address" preset - #4353
-	      if (/^addr:/.test(k) && geometryMatches['addr:*']) {
-	        address = geometryMatches['addr:*'][0];
+	    return this;
+	  },
+	  insert: function insert(item) {
+	    if (item) this._insert(item, this.data.height - 1);
+	    return this;
+	  },
+	  clear: function clear() {
+	    this.data = createNode$1([]);
+	    return this;
+	  },
+	  remove: function remove(item, equalsFn) {
+	    if (!item) return this;
+	    var node = this.data,
+	        bbox = this.toBBox(item),
+	        path = [],
+	        indexes = [],
+	        i,
+	        parent,
+	        index,
+	        goingUp; // depth-first iterative tree traversal
+
+	    while (node || path.length) {
+	      if (!node) {
+	        // go up
+	        node = path.pop();
+	        parent = path[path.length - 1];
+	        i = indexes.pop();
+	        goingUp = true;
 	      }
 
-	      var keyMatches = geometryMatches[k];
-	      if (!keyMatches) { continue; }
+	      if (node.leaf) {
+	        // check current node
+	        index = findItem$1(item, node.children, equalsFn);
+
+	        if (index !== -1) {
+	          // item found, remove the item and condense tree upwards
+	          node.children.splice(index, 1);
+	          path.push(node);
+
+	          this._condense(path);
 
-	      for (var i = 0; i < keyMatches.length; i++) {
-	        var score = keyMatches[i].matchScore(tags);
-	        if (score > best) {
-	          best = score;
-	          match = keyMatches[i];
+	          return this;
 	        }
 	      }
+
+	      if (!goingUp && !node.leaf && contains$1(node, bbox)) {
+	        // go down
+	        path.push(node);
+	        indexes.push(i);
+	        i = 0;
+	        parent = node;
+	        node = node.children[0];
+	      } else if (parent) {
+	        // go right
+	        i++;
+	        node = parent.children[i];
+	        goingUp = false;
+	      } else node = null; // nothing found
+
 	    }
 
-	    if (address && (!match || match.isFallback())) {
-	      match = address;
+	    return this;
+	  },
+	  toBBox: function toBBox(item) {
+	    return item;
+	  },
+	  compareMinX: compareNodeMinX$1,
+	  compareMinY: compareNodeMinY$1,
+	  toJSON: function toJSON() {
+	    return this.data;
+	  },
+	  fromJSON: function fromJSON(data) {
+	    this.data = data;
+	    return this;
+	  },
+	  _all: function _all(node, result) {
+	    var nodesToSearch = [];
+
+	    while (node) {
+	      if (node.leaf) result.push.apply(result, node.children);else nodesToSearch.push.apply(nodesToSearch, node.children);
+	      node = nodesToSearch.pop();
 	    }
-	    return match || _this.fallback(geometry);
-	  };
 
+	    return result;
+	  },
+	  _build: function _build(items, left, right, height) {
+	    var N = right - left + 1,
+	        M = this._maxEntries,
+	        node;
 
-	  _this.allowsVertex = function (entity, resolver) {
-	    if (entity.type !== 'node') { return false; }
-	    if (Object.keys(entity.tags).length === 0) { return true; }
+	    if (N <= M) {
+	      // reached leaf level; return leaf
+	      node = createNode$1(items.slice(left, right + 1));
+	      calcBBox$1(node, this.toBBox);
+	      return node;
+	    }
 
-	    return resolver.transient(entity, 'vertexMatch', function () {
-	      // address lines allow vertices to act as standalone points
-	      if (entity.isOnAddressLine(resolver)) { return true; }
+	    if (!height) {
+	      // target height of the bulk-loaded tree
+	      height = Math.ceil(Math.log(N) / Math.log(M)); // target number of root entries to maximize storage utilization
 
-	      var geometries = osmNodeGeometriesForTags(entity.tags);
-	      if (geometries.vertex) { return true; }
-	      if (geometries.point) { return false; }
-	      // allow vertices for unspecified points
-	      return true;
-	    });
-	  };
+	      M = Math.ceil(N / Math.pow(M, height - 1));
+	    }
 
+	    node = createNode$1([]);
+	    node.leaf = false;
+	    node.height = height; // split the items into M mostly square tiles
 
-	  // Because of the open nature of tagging, iD will never have a complete
-	  // list of tags used in OSM, so we want it to have logic like "assume
-	  // that a closed way with an amenity tag is an area, unless the amenity
-	  // is one of these specific types". This function computes a structure
-	  // that allows testing of such conditions, based on the presets designated
-	  // as as supporting (or not supporting) the area geometry.
-	  //
-	  // The returned object L is a keeplist/discardlist of tags. A closed way
-	  // with a tag (k, v) is considered to be an area if `k in L && !(v in L[k])`
-	  // (see `Way#isArea()`). In other words, the keys of L form the keeplist,
-	  // and the subkeys form the discardlist.
-	  _this.areaKeys = function () {
-	    // The ignore list is for keys that imply lines. (We always add `area=yes` for exceptions)
-	    var ignore = ['barrier', 'highway', 'footway', 'railway', 'junction', 'type'];
-	    var areaKeys = {};
+	    var N2 = Math.ceil(N / M),
+	        N1 = N2 * Math.ceil(Math.sqrt(M)),
+	        i,
+	        j,
+	        right2,
+	        right3;
+	    multiSelect$1(items, left, right, N1, this.compareMinX);
 
-	    // ignore name-suggestion-index and deprecated presets
-	    var presets = _this.collection.filter(function (p) { return !p.suggestion && !p.replacement; });
+	    for (i = left; i <= right; i += N1) {
+	      right2 = Math.min(i + N1 - 1, right);
+	      multiSelect$1(items, i, right2, N2, this.compareMinY);
 
-	    // keeplist
-	    presets.forEach(function (p) {
-	      var key;
-	      for (key in p.tags) { break; }  // pick the first tag
-	      if (!key) { return; }
-	      if (ignore.indexOf(key) !== -1) { return; }
+	      for (j = i; j <= right2; j += N2) {
+	        right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
 
-	      if (p.geometry.indexOf('area') !== -1) {    // probably an area..
-	        areaKeys[key] = areaKeys[key] || {};
+	        node.children.push(this._build(items, j, right3, height - 1));
 	      }
-	    });
+	    }
 
-	    // discardlist
-	    presets.forEach(function (p) {
-	      var key;
-	      for (key in p.addTags) {
-	        // examine all addTags to get a better sense of what can be tagged on lines - #6800
-	        var value = p.addTags[key];
-	        if (key in areaKeys &&                    // probably an area...
-	          p.geometry.indexOf('line') !== -1 &&    // but sometimes a line
-	          value !== '*') {
-	          areaKeys[key][value] = true;
+	    calcBBox$1(node, this.toBBox);
+	    return node;
+	  },
+	  _chooseSubtree: function _chooseSubtree(bbox, node, level, path) {
+	    var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;
+
+	    while (true) {
+	      path.push(node);
+	      if (node.leaf || path.length - 1 === level) break;
+	      minArea = minEnlargement = Infinity;
+
+	      for (i = 0, len = node.children.length; i < len; i++) {
+	        child = node.children[i];
+	        area = bboxArea$1(child);
+	        enlargement = enlargedArea$1(bbox, child) - area; // choose entry with the least area enlargement
+
+	        if (enlargement < minEnlargement) {
+	          minEnlargement = enlargement;
+	          minArea = area < minArea ? area : minArea;
+	          targetNode = child;
+	        } else if (enlargement === minEnlargement) {
+	          // otherwise choose one with the smallest area
+	          if (area < minArea) {
+	            minArea = area;
+	            targetNode = child;
+	          }
 	        }
 	      }
-	    });
 
-	    return areaKeys;
-	  };
+	      node = targetNode || node.children[0];
+	    }
 
+	    return node;
+	  },
+	  _insert: function _insert(item, level, isNode) {
+	    var toBBox = this.toBBox,
+	        bbox = isNode ? item : toBBox(item),
+	        insertPath = []; // find the best node for accommodating the item, saving all nodes along the path too
 
-	  _this.pointTags = function () {
-	    return _this.collection.reduce(function (pointTags, d) {
-	      // ignore name-suggestion-index, deprecated, and generic presets
-	      if (d.suggestion || d.replacement || d.searchable === false) { return pointTags; }
+	    var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
-	      // only care about the primary tag
-	      var key;
-	      for (key in d.tags) { break; }  // pick the first tag
-	      if (!key) { return pointTags; }
 
-	      // if this can be a point
-	      if (d.geometry.indexOf('point') !== -1) {
-	        pointTags[key] = pointTags[key] || {};
-	        pointTags[key][d.tags[key]] = true;
-	      }
-	      return pointTags;
-	    }, {});
-	  };
+	    node.children.push(item);
+	    extend$2(node, bbox); // split on node overflow; propagate upwards if necessary
 
+	    while (level >= 0) {
+	      if (insertPath[level].children.length > this._maxEntries) {
+	        this._split(insertPath, level);
 
-	  _this.vertexTags = function () {
-	    return _this.collection.reduce(function (vertexTags, d) {
-	      // ignore name-suggestion-index, deprecated, and generic presets
-	      if (d.suggestion || d.replacement || d.searchable === false) { return vertexTags; }
+	        level--;
+	      } else break;
+	    } // adjust bboxes along the insertion path
 
-	      // only care about the primary tag
-	      var key;
-	      for (key in d.tags) { break; }   // pick the first tag
-	      if (!key) { return vertexTags; }
 
-	      // if this can be a vertex
-	      if (d.geometry.indexOf('vertex') !== -1) {
-	        vertexTags[key] = vertexTags[key] || {};
-	        vertexTags[key][d.tags[key]] = true;
-	      }
-	      return vertexTags;
-	    }, {});
-	  };
+	    this._adjustParentBBoxes(bbox, insertPath, level);
+	  },
+	  // split overflowed node into two
+	  _split: function _split(insertPath, level) {
+	    var node = insertPath[level],
+	        M = node.children.length,
+	        m = this._minEntries;
 
+	    this._chooseSplitAxis(node, m, M);
 
-	  _this.field = function (id) { return _fields[id]; };
+	    var splitIndex = this._chooseSplitIndex(node, m, M);
 
-	  _this.universal = function () { return _universal; };
+	    var newNode = createNode$1(node.children.splice(splitIndex, node.children.length - splitIndex));
+	    newNode.height = node.height;
+	    newNode.leaf = node.leaf;
+	    calcBBox$1(node, this.toBBox);
+	    calcBBox$1(newNode, this.toBBox);
+	    if (level) insertPath[level - 1].children.push(newNode);else this._splitRoot(node, newNode);
+	  },
+	  _splitRoot: function _splitRoot(node, newNode) {
+	    // split root node
+	    this.data = createNode$1([node, newNode]);
+	    this.data.height = node.height + 1;
+	    this.data.leaf = false;
+	    calcBBox$1(this.data, this.toBBox);
+	  },
+	  _chooseSplitIndex: function _chooseSplitIndex(node, m, M) {
+	    var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;
+	    minOverlap = minArea = Infinity;
+
+	    for (i = m; i <= M - m; i++) {
+	      bbox1 = distBBox$1(node, 0, i, this.toBBox);
+	      bbox2 = distBBox$1(node, i, M, this.toBBox);
+	      overlap = intersectionArea$1(bbox1, bbox2);
+	      area = bboxArea$1(bbox1) + bboxArea$1(bbox2); // choose distribution with minimum overlap
+
+	      if (overlap < minOverlap) {
+	        minOverlap = overlap;
+	        index = i;
+	        minArea = area < minArea ? area : minArea;
+	      } else if (overlap === minOverlap) {
+	        // otherwise choose distribution with minimum area
+	        if (area < minArea) {
+	          minArea = area;
+	          index = i;
+	        }
+	      }
+	    }
 
+	    return index;
+	  },
+	  // sorts node children by the best axis for split
+	  _chooseSplitAxis: function _chooseSplitAxis(node, m, M) {
+	    var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX$1,
+	        compareMinY = node.leaf ? this.compareMinY : compareNodeMinY$1,
+	        xMargin = this._allDistMargin(node, m, M, compareMinX),
+	        yMargin = this._allDistMargin(node, m, M, compareMinY); // if total distributions margin value is minimal for x, sort by minX,
+	    // otherwise it's already sorted by minY
 
-	  _this.defaults = function (geometry, n, startWithRecents) {
-	    var recents = [];
-	    if (startWithRecents) {
-	      recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
-	    }
-	    var defaults;
-	    if (_addablePresetIDs) {
-	      defaults = Array.from(_addablePresetIDs).map(function(id) {
-	        var preset = _this.item(id);
-	        if (preset && preset.matchGeometry(geometry)) { return preset; }
-	        return null;
-	      }).filter(Boolean);
-	    } else {
-	      defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
-	    }
 
-	    return presetCollection(
-	      utilArrayUniq(recents.concat(defaults)).slice(0, n - 1)
-	    );
-	  };
+	    if (xMargin < yMargin) node.children.sort(compareMinX);
+	  },
+	  // total margin of all possible split distributions where each node is at least m full
+	  _allDistMargin: function _allDistMargin(node, m, M, compare) {
+	    node.children.sort(compare);
+	    var toBBox = this.toBBox,
+	        leftBBox = distBBox$1(node, 0, m, toBBox),
+	        rightBBox = distBBox$1(node, M - m, M, toBBox),
+	        margin = bboxMargin$1(leftBBox) + bboxMargin$1(rightBBox),
+	        i,
+	        child;
 
-	  // pass a Set of addable preset ids
-	  _this.addablePresetIDs = function(val) {
-	    if (!arguments.length) { return _addablePresetIDs; }
+	    for (i = m; i < M - m; i++) {
+	      child = node.children[i];
+	      extend$2(leftBBox, node.leaf ? toBBox(child) : child);
+	      margin += bboxMargin$1(leftBBox);
+	    }
 
-	    // accept and convert arrays
-	    if (Array.isArray(val)) { val = new Set(val); }
+	    for (i = M - m - 1; i >= m; i--) {
+	      child = node.children[i];
+	      extend$2(rightBBox, node.leaf ? toBBox(child) : child);
+	      margin += bboxMargin$1(rightBBox);
+	    }
 
-	    _addablePresetIDs = val;
-	    if (_addablePresetIDs) {   // reset all presets
-	      _this.collection.forEach(function (p) {
-	        // categories aren't addable
-	        if (p.addable) { p.addable(_addablePresetIDs.has(p.id)); }
-	      });
-	    } else {
-	      _this.collection.forEach(function (p) {
-	        if (p.addable) { p.addable(true); }
-	      });
+	    return margin;
+	  },
+	  _adjustParentBBoxes: function _adjustParentBBoxes(bbox, path, level) {
+	    // adjust bboxes along the given tree path
+	    for (var i = level; i >= 0; i--) {
+	      extend$2(path[i], bbox);
+	    }
+	  },
+	  _condense: function _condense(path) {
+	    // go through the path, removing empty nodes and updating bboxes
+	    for (var i = path.length - 1, siblings; i >= 0; i--) {
+	      if (path[i].children.length === 0) {
+	        if (i > 0) {
+	          siblings = path[i - 1].children;
+	          siblings.splice(siblings.indexOf(path[i]), 1);
+	        } else this.clear();
+	      } else calcBBox$1(path[i], this.toBBox);
 	    }
+	  },
+	  _initFormat: function _initFormat(format) {
+	    // data format (minX, minY, maxX, maxY accessors)
+	    // uses eval-type function compilation instead of just accepting a toBBox function
+	    // because the algorithms are very sensitive to sorting functions performance,
+	    // so they should be dead simple and without inner calls
+	    var compareArr = ['return a', ' - b', ';'];
+	    this.compareMinX = new Function('a', 'b', compareArr.join(format[0]));
+	    this.compareMinY = new Function('a', 'b', compareArr.join(format[1]));
+	    this.toBBox = new Function('a', 'return {minX: a' + format[0] + ', minY: a' + format[1] + ', maxX: a' + format[2] + ', maxY: a' + format[3] + '};');
+	  }
+	};
 
-	    return _this;
-	  };
+	function findItem$1(item, items, equalsFn) {
+	  if (!equalsFn) return items.indexOf(item);
 
+	  for (var i = 0; i < items.length; i++) {
+	    if (equalsFn(item, items[i])) return i;
+	  }
 
-	  _this.recent = function () {
-	    return presetCollection(
-	      utilArrayUniq(_this.getRecents().map(function (d) { return d.preset; }))
-	    );
-	  };
+	  return -1;
+	} // calculate node's bbox from bboxes of its children
 
 
-	  function RibbonItem(preset, source) {
-	    var item = {};
-	    item.preset = preset;
-	    item.source = source;
+	function calcBBox$1(node, toBBox) {
+	  distBBox$1(node, 0, node.children.length, toBBox, node);
+	} // min bounding rectangle of node children from k to p-1
 
-	    item.isFavorite = function () { return item.source === 'favorite'; };
-	    item.isRecent = function () { return item.source === 'recent'; };
-	    item.matches = function (preset) { return item.preset.id === preset.id; };
-	    item.minified = function () { return ({ pID: item.preset.id }); };
 
-	    return item;
+	function distBBox$1(node, k, p, toBBox, destNode) {
+	  if (!destNode) destNode = createNode$1(null);
+	  destNode.minX = Infinity;
+	  destNode.minY = Infinity;
+	  destNode.maxX = -Infinity;
+	  destNode.maxY = -Infinity;
+
+	  for (var i = k, child; i < p; i++) {
+	    child = node.children[i];
+	    extend$2(destNode, node.leaf ? toBBox(child) : child);
 	  }
 
+	  return destNode;
+	}
 
-	  function ribbonItemForMinified(d, source) {
-	    if (d && d.pID) {
-	      var preset = _this.item(d.pID);
-	      if (!preset) { return null; }
-	      return RibbonItem(preset, source);
-	    }
-	    return null;
-	  }
+	function extend$2(a, b) {
+	  a.minX = Math.min(a.minX, b.minX);
+	  a.minY = Math.min(a.minY, b.minY);
+	  a.maxX = Math.max(a.maxX, b.maxX);
+	  a.maxY = Math.max(a.maxY, b.maxY);
+	  return a;
+	}
 
+	function compareNodeMinX$1(a, b) {
+	  return a.minX - b.minX;
+	}
 
-	  _this.getGenericRibbonItems = function () {
-	    return ['point', 'line', 'area'].map(function (id) { return RibbonItem(_this.item(id), 'generic'); });
-	  };
+	function compareNodeMinY$1(a, b) {
+	  return a.minY - b.minY;
+	}
 
+	function bboxArea$1(a) {
+	  return (a.maxX - a.minX) * (a.maxY - a.minY);
+	}
 
-	  _this.getAddable = function () {
-	      if (!_addablePresetIDs) { return []; }
+	function bboxMargin$1(a) {
+	  return a.maxX - a.minX + (a.maxY - a.minY);
+	}
 
-	      return _addablePresetIDs.map(function (id) {
-	        var preset = _this.item(id);
-	        if (preset) {
-	          return RibbonItem(preset, 'addable');
-	        }
-	      }).filter(Boolean);
-	  };
+	function enlargedArea$1(a, b) {
+	  return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) * (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
+	}
 
+	function intersectionArea$1(a, b) {
+	  var minX = Math.max(a.minX, b.minX),
+	      minY = Math.max(a.minY, b.minY),
+	      maxX = Math.min(a.maxX, b.maxX),
+	      maxY = Math.min(a.maxY, b.maxY);
+	  return Math.max(0, maxX - minX) * Math.max(0, maxY - minY);
+	}
 
-	  function setRecents(items) {
-	    _recents = items;
-	    var minifiedItems = items.map(function (d) { return d.minified(); });
-	    corePreferences('preset_recents', JSON.stringify(minifiedItems));
-	    dispatch$1.call('recentsChange');
-	  }
+	function contains$1(a, b) {
+	  return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+	}
 
+	function intersects$1(a, b) {
+	  return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+	}
 
-	  _this.getRecents = function () {
-	    if (!_recents) {
-	      // fetch from local storage
-	      _recents = (JSON.parse(corePreferences('preset_recents')) || [])
-	        .reduce(function (acc, d) {
-	          var item = ribbonItemForMinified(d, 'recent');
-	          if (item && item.preset.addable()) { acc.push(item); }
-	          return acc;
-	        }, []);
-	    }
-	    return _recents;
-	  };
+	function createNode$1(children) {
+	  return {
+	    children: children,
+	    height: 1,
+	    leaf: true,
+	    minX: Infinity,
+	    minY: Infinity,
+	    maxX: -Infinity,
+	    maxY: -Infinity
+	  };
+	} // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
+	// combines selection algorithm with binary divide & conquer approach
 
 
-	  _this.addRecent = function (preset, besidePreset, after) {
-	    var recents = _this.getRecents();
+	function multiSelect$1(arr, left, right, n, compare) {
+	  var stack = [left, right],
+	      mid;
 
-	    var beforeItem = _this.recentMatching(besidePreset);
-	    var toIndex = recents.indexOf(beforeItem);
-	    if (after) { toIndex += 1; }
+	  while (stack.length) {
+	    right = stack.pop();
+	    left = stack.pop();
+	    if (right - left <= n) continue;
+	    mid = left + Math.ceil((right - left) / n / 2) * n;
+	    quickselect$1(arr, mid, left, right, compare);
+	    stack.push(left, mid, mid, right);
+	  }
+	}
 
-	    var newItem = RibbonItem(preset, 'recent');
-	    recents.splice(toIndex, 0, newItem);
-	    setRecents(recents);
-	  };
+	var lineclip_1 = lineclip$2;
+	lineclip$2.polyline = lineclip$2;
+	lineclip$2.polygon = polygonclip$1; // Cohen-Sutherland line clippign algorithm, adapted to efficiently
+	// handle polylines rather than just segments
 
+	function lineclip$2(points, bbox, result) {
+	  var len = points.length,
+	      codeA = bitCode$1(points[0], bbox),
+	      part = [],
+	      i,
+	      a,
+	      b,
+	      codeB,
+	      lastCode;
+	  if (!result) result = [];
 
-	  _this.removeRecent = function (preset) {
-	    var item = _this.recentMatching(preset);
-	    if (item) {
-	      var items = _this.getRecents();
-	      items.splice(items.indexOf(item), 1);
-	      setRecents(items);
-	    }
-	  };
+	  for (i = 1; i < len; i++) {
+	    a = points[i - 1];
+	    b = points[i];
+	    codeB = lastCode = bitCode$1(b, bbox);
 
+	    while (true) {
+	      if (!(codeA | codeB)) {
+	        // accept
+	        part.push(a);
+
+	        if (codeB !== lastCode) {
+	          // segment went outside
+	          part.push(b);
+
+	          if (i < len - 1) {
+	            // start a new line
+	            result.push(part);
+	            part = [];
+	          }
+	        } else if (i === len - 1) {
+	          part.push(b);
+	        }
 
-	  _this.recentMatching = function (preset) {
-	    var items = _this.getRecents();
-	    for (var i in items) {
-	      if (items[i].matches(preset)) {
-	        return items[i];
+	        break;
+	      } else if (codeA & codeB) {
+	        // trivial reject
+	        break;
+	      } else if (codeA) {
+	        // a outside, intersect with clip edge
+	        a = intersect$1(a, b, codeA, bbox);
+	        codeA = bitCode$1(a, bbox);
+	      } else {
+	        // b outside
+	        b = intersect$1(a, b, codeB, bbox);
+	        codeB = bitCode$1(b, bbox);
 	      }
 	    }
-	    return null;
-	  };
 
+	    codeA = lastCode;
+	  }
 
-	  _this.moveItem = function (items, fromIndex, toIndex) {
-	    if (fromIndex === toIndex ||
-	      fromIndex < 0 || toIndex < 0 ||
-	      fromIndex >= items.length || toIndex >= items.length
-	    ) { return null; }
+	  if (part.length) result.push(part);
+	  return result;
+	} // Sutherland-Hodgeman polygon clipping algorithm
 
-	    items.splice(toIndex, 0, items.splice(fromIndex, 1)[0]);
-	    return items;
-	  };
 
+	function polygonclip$1(points, bbox) {
+	  var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
 
-	  _this.moveRecent = function (item, beforeItem) {
-	    var recents = _this.getRecents();
-	    var fromIndex = recents.indexOf(item);
-	    var toIndex = recents.indexOf(beforeItem);
-	    var items = _this.moveItem(recents, fromIndex, toIndex);
-	    if (items) { setRecents(items); }
-	  };
+	  for (edge = 1; edge <= 8; edge *= 2) {
+	    result = [];
+	    prev = points[points.length - 1];
+	    prevInside = !(bitCode$1(prev, bbox) & edge);
 
+	    for (i = 0; i < points.length; i++) {
+	      p = points[i];
+	      inside = !(bitCode$1(p, bbox) & edge); // if segment goes through the clip window, add an intersection
 
-	  _this.setMostRecent = function (preset) {
-	    if (preset.searchable === false) { return; }
+	      if (inside !== prevInside) result.push(intersect$1(prev, p, edge, bbox));
+	      if (inside) result.push(p); // add a point if it's inside
 
-	    var items = _this.getRecents();
-	    var item = _this.recentMatching(preset);
-	    if (item) {
-	      items.splice(items.indexOf(item), 1);
-	    } else {
-	      item = RibbonItem(preset, 'recent');
+	      prev = p;
+	      prevInside = inside;
 	    }
 
-	    // remove the last recent (first in, first out)
-	    while (items.length >= MAXRECENTS) {
-	      items.pop();
-	    }
+	    points = result;
+	    if (!points.length) break;
+	  }
+
+	  return result;
+	} // intersect a segment against one of the 4 lines that make up the bbox
+
 
-	    // prepend array
-	    items.unshift(item);
-	    setRecents(items);
-	  };
+	function intersect$1(a, b, edge, bbox) {
+	  return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
+	  edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
+	  edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
+	  edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
+	  null;
+	} // bit code reflects the point position relative to the bbox:
+	//         left  mid  right
+	//    top  1001  1000  1010
+	//    mid  0001  0000  0010
+	// bottom  0101  0100  0110
 
-	  function setFavorites(items) {
-	    _favorites = items;
-	    var minifiedItems = items.map(function (d) { return d.minified(); });
-	    corePreferences('preset_favorites', JSON.stringify(minifiedItems));
 
-	    // call update
-	    dispatch$1.call('favoritePreset');
-	  }
+	function bitCode$1(p, bbox) {
+	  var code = 0;
+	  if (p[0] < bbox[0]) code |= 1; // left
+	  else if (p[0] > bbox[2]) code |= 2; // right
 
-	  _this.addFavorite = function (preset, besidePreset, after) {
-	      var favorites = _this.getFavorites();
+	  if (p[1] < bbox[1]) code |= 4; // bottom
+	  else if (p[1] > bbox[3]) code |= 8; // top
 
-	      var beforeItem = _this.favoriteMatching(besidePreset);
-	      var toIndex = favorites.indexOf(beforeItem);
-	      if (after) { toIndex += 1; }
+	  return code;
+	}
 
-	      var newItem = RibbonItem(preset, 'favorite');
-	      favorites.splice(toIndex, 0, newItem);
-	      setFavorites(favorites);
-	  };
+	var rbush = rbush$2.exports;
+	var lineclip$1 = lineclip_1;
+	var whichPolygon_1 = whichPolygon;
 
-	  _this.toggleFavorite = function (preset) {
-	    var favs = _this.getFavorites();
-	    var favorite = _this.favoriteMatching(preset);
-	    if (favorite) {
-	      favs.splice(favs.indexOf(favorite), 1);
-	    } else {
-	      // only allow 10 favorites
-	      if (favs.length === 10) {
-	          // remove the last favorite (last in, first out)
-	          favs.pop();
+	function whichPolygon(data) {
+	  var bboxes = [];
+
+	  for (var i = 0; i < data.features.length; i++) {
+	    var feature = data.features[i];
+	    var coords = feature.geometry.coordinates;
+
+	    if (feature.geometry.type === 'Polygon') {
+	      bboxes.push(treeItem(coords, feature.properties));
+	    } else if (feature.geometry.type === 'MultiPolygon') {
+	      for (var j = 0; j < coords.length; j++) {
+	        bboxes.push(treeItem(coords[j], feature.properties));
 	      }
-	      // append array
-	      favs.push(RibbonItem(preset, 'favorite'));
 	    }
-	    setFavorites(favs);
-	  };
+	  }
 
+	  var tree = rbush().load(bboxes);
 
-	  _this.removeFavorite = function (preset) {
-	    var item = _this.favoriteMatching(preset);
-	    if (item) {
-	      var items = _this.getFavorites();
-	      items.splice(items.indexOf(item), 1);
-	      setFavorites(items);
+	  function query(p, multi) {
+	    var output = [],
+	        result = tree.search({
+	      minX: p[0],
+	      minY: p[1],
+	      maxX: p[0],
+	      maxY: p[1]
+	    });
+
+	    for (var i = 0; i < result.length; i++) {
+	      if (insidePolygon(result[i].coords, p)) {
+	        if (multi) output.push(result[i].props);else return result[i].props;
+	      }
 	    }
-	  };
 
+	    return multi && output.length ? output : null;
+	  }
 
-	  _this.getFavorites = function () {
-	    if (!_favorites) {
+	  query.tree = tree;
 
-	      // fetch from local storage
-	      var rawFavorites = JSON.parse(corePreferences('preset_favorites'));
+	  query.bbox = function queryBBox(bbox) {
+	    var output = [];
+	    var result = tree.search({
+	      minX: bbox[0],
+	      minY: bbox[1],
+	      maxX: bbox[2],
+	      maxY: bbox[3]
+	    });
 
-	      if (!rawFavorites) {
-	        rawFavorites = [];
-	        corePreferences('preset_favorites', JSON.stringify(rawFavorites));
+	    for (var i = 0; i < result.length; i++) {
+	      if (polygonIntersectsBBox(result[i].coords, bbox)) {
+	        output.push(result[i].props);
 	      }
-
-	      _favorites = rawFavorites.reduce(function (output, d) {
-	        var item = ribbonItemForMinified(d, 'favorite');
-	        if (item && item.preset.addable()) { output.push(item); }
-	        return output;
-	      }, []);
 	    }
-	    return _favorites;
+
+	    return output;
 	  };
 
+	  return query;
+	}
 
-	  _this.favoriteMatching = function (preset) {
-	    var favs = _this.getFavorites();
-	    for (var index in favs) {
-	      if (favs[index].matches(preset)) {
-	        return favs[index];
-	      }
-	    }
-	    return null;
-	  };
+	function polygonIntersectsBBox(polygon, bbox) {
+	  var bboxCenter = [(bbox[0] + bbox[2]) / 2, (bbox[1] + bbox[3]) / 2];
+	  if (insidePolygon(polygon, bboxCenter)) return true;
 
+	  for (var i = 0; i < polygon.length; i++) {
+	    if (lineclip$1(polygon[i], bbox).length > 0) return true;
+	  }
 
-	  return utilRebind(_this, dispatch$1, 'on');
-	}
+	  return false;
+	} // ray casting algorithm for detecting if point is in polygon
 
-	function utilTagText(entity) {
-	    var obj = (entity && entity.tags) || {};
-	    return Object.keys(obj)
-	        .map(function(k) { return k + '=' + obj[k]; })
-	        .join(', ');
-	}
 
+	function insidePolygon(rings, p) {
+	  var inside = false;
 
-	function utilTotalExtent(array, graph) {
-	    var extent = geoExtent();
-	    var val, entity;
-	    for (var i = 0; i < array.length; i++) {
-	        val = array[i];
-	        entity = typeof val === 'string' ? graph.hasEntity(val) : val;
-	        if (entity) {
-	            extent._extend(entity.extent(graph));
-	        }
+	  for (var i = 0, len = rings.length; i < len; i++) {
+	    var ring = rings[i];
+
+	    for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
+	      if (rayIntersect(p, ring[j], ring[k])) inside = !inside;
 	    }
-	    return extent;
-	}
+	  }
 
+	  return inside;
+	}
 
-	function utilTagDiff(oldTags, newTags) {
-	    var tagDiff = [];
-	    var keys = utilArrayUnion(Object.keys(oldTags), Object.keys(newTags)).sort();
-	    keys.forEach(function(k) {
-	        var oldVal = oldTags[k];
-	        var newVal = newTags[k];
-
-	        if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
-	            tagDiff.push({
-	                type: '-',
-	                key: k,
-	                oldVal: oldVal,
-	                newVal: newVal,
-	                display: '- ' + k + '=' + oldVal
-	            });
-	        }
-	        if ((newVal || newVal === '') && (oldVal === undefined || newVal !== oldVal)) {
-	            tagDiff.push({
-	                type: '+',
-	                key: k,
-	                oldVal: oldVal,
-	                newVal: newVal,
-	                display: '+ ' + k + '=' + newVal
-	            });
-	        }
-	    });
-	    return tagDiff;
+	function rayIntersect(p, p1, p2) {
+	  return p1[1] > p[1] !== p2[1] > p[1] && p[0] < (p2[0] - p1[0]) * (p[1] - p1[1]) / (p2[1] - p1[1]) + p1[0];
 	}
 
+	function treeItem(coords, props) {
+	  var item = {
+	    minX: Infinity,
+	    minY: Infinity,
+	    maxX: -Infinity,
+	    maxY: -Infinity,
+	    coords: coords,
+	    props: props
+	  };
+
+	  for (var i = 0; i < coords[0].length; i++) {
+	    var p = coords[0][i];
+	    item.minX = Math.min(item.minX, p[0]);
+	    item.minY = Math.min(item.minY, p[1]);
+	    item.maxX = Math.max(item.maxX, p[0]);
+	    item.maxY = Math.max(item.maxY, p[1]);
+	  }
 
-	function utilEntitySelector(ids) {
-	    return ids.length ? '.' + ids.join(',.') : 'nothing';
+	  return item;
 	}
 
+	var type = "FeatureCollection";
+	var features = [{
+	  type: "Feature",
+	  properties: {
+	    wikidata: "Q21",
+	    nameEn: "England",
+	    aliases: ["GB-ENG"],
+	    country: "GB",
+	    groups: ["Q23666", "Q3336843", "154", "150", "UN"],
+	    driveSide: "left",
+	    roadSpeedUnit: "mph",
+	    roadHeightUnit: "ft",
+	    callingCodes: ["44"]
+	  },
+	  geometry: {
+	    type: "MultiPolygon",
+	    coordinates: [[[[-6.03913, 51.13217], [-7.74976, 48.64773], [1.17405, 50.74239], [2.18458, 51.52087], [2.56575, 51.85301], [0.792, 57.56437], [-2.30613, 55.62698], [-2.17058, 55.45916], [-2.6095, 55.28488], [-2.63532, 55.19452], [-3.02906, 55.04606], [-3.09361, 54.94924], [-3.38407, 54.94278], [-4.1819, 54.57861], [-3.5082, 53.54318], [-3.08228, 53.25526], [-3.03675, 53.25092], [-2.92329, 53.19383], [-2.92022, 53.17685], [-2.98598, 53.15589], [-2.90649, 53.10964], [-2.87469, 53.12337], [-2.89131, 53.09374], [-2.83133, 52.99184], [-2.7251, 52.98389], [-2.72221, 52.92969], [-2.80549, 52.89428], [-2.85897, 52.94487], [-2.92401, 52.93836], [-2.97243, 52.9651], [-3.13576, 52.895], [-3.15744, 52.84947], [-3.16105, 52.79599], [-3.08734, 52.77504], [-3.01001, 52.76636], [-2.95581, 52.71794], [-3.01724, 52.72083], [-3.04398, 52.65435], [-3.13648, 52.58208], [-3.12926, 52.5286], [-3.09746, 52.53077], [-3.08662, 52.54811], [-3.00929, 52.57774], [-2.99701, 52.551], [-3.03603, 52.49969], [-3.13359, 52.49174], [-3.22971, 52.45344], [-3.22754, 52.42526], [-3.04687, 52.34504], [-2.95364, 52.3501], [-2.99701, 52.323], [-3.00785, 52.2753], [-3.09289, 52.20546], [-3.12638, 52.08114], [-2.97111, 51.90456], [-2.8818, 51.93196], [-2.78742, 51.88833], [-2.74277, 51.84367], [-2.66234, 51.83555], [-2.66336, 51.59504], [-3.20563, 51.31615], [-6.03913, 51.13217]]]]
+	  }
+	}, {
+	  type: "Feature",
+	  properties: {
+	    wikidata: "Q22",
+	    nameEn: "Scotland",
+	    aliases: ["GB-SCT"],
+	    country: "GB",
+	    groups: ["Q23666", "Q3336843", "154", "150", "UN"],
+	    driveSide: "left",
+	    roadSpeedUnit: "mph",
+	    roadHeightUnit: "ft",
+	    callingCodes: ["44"]
+	  },
+	  geometry: {
+	    type: "MultiPolygon",
+	    coordinates: [[[[0.792, 57.56437], [-0.3751, 61.32236], [-14.78497, 57.60709], [-6.82333, 55.83103], [-4.69044, 54.3629], [-3.38407, 54.94278], [-3.09361, 54.94924], [-3.02906, 55.04606], [-2.63532, 55.19452], [-2.6095, 55.28488], [-2.17058, 55.45916], [-2.30613, 55.62698], [0.792, 57.56437]]]]
+	  }
+	}, {
+	  type: "Feature",
+	  properties: {
+	    wikidata: "Q25",
+	    nameEn: "Wales",
+	    aliases: ["GB-WLS"],
+	    country: "GB",
+	    groups: ["Q23666", "Q3336843", "154", "150", "UN"],
+	    driveSide: "left",
+	    roadSpeedUnit: "mph",
+	    roadHeightUnit: "ft",
+	    callingCodes: ["44"]
+	  },
+	  geometry: {
+	    type: "MultiPolygon",
+	    coordinates: [[[[-3.5082, 53.54318], [-5.37267, 53.63269], [-6.03913, 51.13217], [-3.20563, 51.31615], [-2.66336, 51.59504], [-2.66234, 51.83555], [-2.74277, 51.84367], [-2.78742, 51.88833], [-2.8818, 51.93196], [-2.97111, 51.90456], [-3.12638, 52.08114], [-3.09289, 52.20546], [-3.00785, 52.2753], [-2.99701, 52.323], [-2.95364, 52.3501], [-3.04687, 52.34504], [-3.22754, 52.42526], [-3.22971, 52.45344], [-3.13359, 52.49174], [-3.03603, 52.49969], [-2.99701, 52.551], [-3.00929, 52.57774], [-3.08662, 52.54811], [-3.09746, 52.53077], [-3.12926, 52.5286], [-3.13648, 52.58208], [-3.04398, 52.65435], [-3.01724, 52.72083], [-2.95581, 52.71794], [-3.01001, 52.76636], [-3.08734, 52.77504], [-3.16105, 52.79599], [-3.15744, 52.84947], [-3.13576, 52.895], [-2.97243, 52.9651], [-2.92401, 52.93836], [-2.85897, 52.94487], [-2.80549, 52.89428], [-2.72221, 52.92969], [-2.7251, 52.98389], [-2.83133, 52.99184], [-2.89131, 53.09374], [-2.87469, 53.12337], [-2.90649, 53.10964], [-2.98598, 53.15589], [-2.92022, 53.17685], [-2.92329, 53.19383], [-3.03675, 53.25092], [-3.08228, 53.25526], [-3.5082, 53.54318]]]]
+	  }
+	}, {
+	  type: "Feature",
+	  properties: {
+	    wikidata: "Q26",
+	    nameEn: "Northern Ireland",
+	    aliases: ["GB-NIR"],
+	    country: "GB",
+	    groups: ["Q22890", "Q3336843", "154", "150", "UN"],
+	    driveSide: "left",
+	    roadSpeedUnit: "mph",
+	    roadHeightUnit: "ft",
+	    callingCodes: ["44"]
+	  },
+	  geometry: {
+	    type: "MultiPolygon",
+	    coordinates: [[[[-6.34755, 55.49206], [-7.2471, 55.06933], [-7.34464, 55.04688], [-7.4033, 55.00391], [-7.40004, 54.94498], [-7.44404, 54.9403], [-7.4473, 54.87003], [-7.47626, 54.83084], [-7.54508, 54.79401], [-7.54671, 54.74606], [-7.64449, 54.75265], [-7.75041, 54.7103], [-7.83352, 54.73854], [-7.93293, 54.66603], [-7.70315, 54.62077], [-7.8596, 54.53671], [-7.99812, 54.54427], [-8.04538, 54.48941], [-8.179, 54.46763], [-8.04555, 54.36292], [-7.87101, 54.29299], [-7.8596, 54.21779], [-7.81397, 54.20159], [-7.69501, 54.20731], [-7.55812, 54.12239], [-7.4799, 54.12239], [-7.44567, 54.1539], [-7.32834, 54.11475], [-7.30553, 54.11869], [-7.34005, 54.14698], [-7.29157, 54.17191], [-7.28017, 54.16714], [-7.29687, 54.1354], [-7.29493, 54.12013], [-7.26316, 54.13863], [-7.25012, 54.20063], [-7.14908, 54.22732], [-7.19145, 54.31296], [-7.02034, 54.4212], [-6.87775, 54.34682], [-6.85179, 54.29176], [-6.81583, 54.22791], [-6.74575, 54.18788], [-6.70175, 54.20218], [-6.6382, 54.17071], [-6.66264, 54.0666], [-6.62842, 54.03503], [-6.47849, 54.06947], [-6.36605, 54.07234], [-6.36279, 54.11248], [-6.32694, 54.09337], [-6.29003, 54.11278], [-6.26218, 54.09785], [-5.83481, 53.87749], [-4.69044, 54.3629], [-6.34755, 55.49206]]]]
+	  }
+	}, {
+	  type: "Feature",
+	  properties: {
+	    wikidata: "Q35",
+	    nameEn: "Denmark",
+	    country: "DK",
+	    groups: ["EU", "154", "150", "UN"],
+	    callingCodes: ["45"]
+	  },
+	  geometry: {
+	    type: "MultiPolygon",
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+	    coordinates: [[[[31.30611, -22.422], [31.16344, -22.32599], [31.08932, -22.34884], [30.86696, -22.28907], [30.6294, -22.32599], [30.48686, -22.31368], [30.38614, -22.34533], [30.28351, -22.35587], [30.2265, -22.2961], [30.13147, -22.30841], [29.92242, -22.19408], [29.76848, -22.14128], [29.64609, -22.12917], [29.37703, -22.19581], [29.21955, -22.17771], [29.18974, -22.18599], [29.15268, -22.21399], [29.10881, -22.21202], [29.0151, -22.22907], [28.91889, -22.44299], [28.63287, -22.55887], [28.34874, -22.5694], [28.04562, -22.8394], [28.04752, -22.90243], [27.93729, -22.96194], [27.93539, -23.04941], [27.74154, -23.2137], [27.6066, -23.21894], [27.52393, -23.37952], [27.33768, -23.40917], [26.99749, -23.65486], [26.84165, -24.24885], [26.51667, -24.47219], [26.46346, -24.60358], [26.39409, -24.63468], [25.8515, -24.75727], [25.84295, -24.78661], [25.88571, -24.87802], [25.72702, -25.25503], [25.69661, -25.29284], [25.6643, -25.4491], [25.58543, -25.6343], [25.33076, -25.76616], [25.12266, -25.75931], [25.01718, -25.72507], [24.8946, -25.80723], [24.67319, -25.81749], [24.44703, -25.73021], [24.36531, -25.773], [24.18287, -25.62916], [23.9244, -25.64286], [23.47588, -25.29971], [23.03497, -25.29971], [22.86012, -25.50572], [22.70808, -25.99186], [22.56365, -26.19668], [22.41921, -26.23078], [22.21206, -26.3773], [22.06192, -26.61882], [21.90703, -26.66808], [21.83291, -26.65959], [21.77114, -26.69015], [21.7854, -26.79199], [21.69322, -26.86152], [21.37869, -26.82083], [21.13353, -26.86661], [20.87031, -26.80047], [20.68596, -26.9039], [20.63275, -26.78181], [20.61754, -26.4692], [20.86081, -26.14892], [20.64795, -25.47827], [20.29826, -24.94869], [20.03678, -24.81004], [20.02809, -24.78725], [19.99817, -24.76768], [19.99882, -28.42622], [18.99885, -28.89165], [17.4579, -28.68718], [17.15405, -28.08573], [16.90446, -28.057], [16.59922, -28.53246], [16.46592, -28.57126], [16.45332, -28.63117], [12.51595, -32.27486], [38.88176, -48.03306], [34.51034, -26.91792], [32.35222, -26.86027], [32.29584, -26.852], [32.22302, -26.84136], [32.19409, -26.84032], [32.13315, -26.84345], [32.09664, -26.80721], [32.00893, -26.8096], [31.97463, -27.11057], [31.97592, -27.31675], [31.49834, -27.31549], [31.15027, -27.20151], [30.96088, -27.0245], [30.97757, -26.92706], [30.88826, -26.79622], [30.81101, -26.84722], [30.78927, -26.48271], [30.95819, -26.26303], [31.13073, -25.91558], [31.31237, -25.7431], [31.4175, -25.71886], [31.86881, -25.99973], [31.974, -25.95387], [31.92649, -25.84216], [32.00631, -25.65044], [31.97875, -25.46356], [32.01676, -25.38117], [32.03196, -25.10785], [31.9835, -24.29983], [31.90368, -24.18892], [31.87707, -23.95293], [31.77445, -23.90082], [31.70223, -23.72695], [31.67942, -23.60858], [31.56539, -23.47268], [31.55779, -23.176], [31.30611, -22.422]], [[29.33204, -29.45598], [29.28545, -29.58456], [29.12553, -29.76266], [29.16548, -29.91706], [28.9338, -30.05072], [28.80222, -30.10579], [28.68627, -30.12885], [28.399, -30.1592], [28.2319, -30.28476], [28.12073, -30.68072], [27.74814, -30.60635], [27.69467, -30.55862], [27.67819, -30.53437], [27.6521, -30.51707], [27.62137, -30.50509], [27.56781, -30.44562], [27.56901, -30.42504], [27.45452, -30.32239], [27.38108, -30.33456], [27.36649, -30.27246], [27.37293, -30.19401], [27.40778, -30.14577], [27.32555, -30.14785], [27.29603, -30.05473], [27.22719, -30.00718], [27.09489, -29.72796], [27.01016, -29.65439], [27.33464, -29.48161], [27.4358, -29.33465], [27.47254, -29.31968], [27.45125, -29.29708], [27.48679, -29.29349], [27.54258, -29.25575], [27.5158, -29.2261], [27.55974, -29.18954], [27.75458, -28.89839], [27.8907, -28.91612], [27.88933, -28.88156], [27.9392, -28.84864], [27.98675, -28.8787], [28.02503, -28.85991], [28.1317, -28.7293], [28.2348, -28.69471], [28.30518, -28.69531], [28.40612, -28.6215], [28.65091, -28.57025], [28.68043, -28.58744], [29.40524, -29.21246], [29.44883, -29.3772], [29.33204, -29.45598]]]]
+	  }
+	}, {
+	  type: "Feature",
+	  properties: {
+	    iso1A2: "ZM",
+	    iso1A3: "ZMB",
+	    iso1N3: "894",
+	    wikidata: "Q953",
+	    nameEn: "Zambia",
+	    groups: ["014", "202", "002", "UN"],
+	    driveSide: "left",
+	    callingCodes: ["260"]
+	  },
+	  geometry: {
+	    type: "MultiPolygon",
+	    coordinates: [[[[32.95389, -9.40138], [32.76233, -9.31963], [32.75611, -9.28583], [32.53661, -9.24281], [32.49147, -9.14754], [32.43543, -9.11988], [32.25486, -9.13371], [32.16146, -9.05993], [32.08206, -9.04609], [31.98866, -9.07069], [31.94196, -9.02303], [31.94663, -8.93846], [31.81587, -8.88618], [31.71158, -8.91386], [31.57147, -8.81388], [31.57147, -8.70619], [31.37533, -8.60769], [31.00796, -8.58615], [30.79243, -8.27382], [28.88917, -8.4831], [28.9711, -8.66935], [28.38526, -9.23393], [28.36562, -9.30091], [28.52636, -9.35379], [28.51627, -9.44726], [28.56208, -9.49122], [28.68532, -9.78], [28.62795, -9.92942], [28.65032, -10.65133], [28.37241, -11.57848], [28.48357, -11.87532], [29.18592, -12.37921], [29.4992, -12.43843], [29.48404, -12.23604], [29.8139, -12.14898], [29.81551, -13.44683], [29.65078, -13.41844], [29.60531, -13.21685], [29.01918, -13.41353], [28.33199, -12.41375], [27.59932, -12.22123], [27.21025, -11.76157], [27.22541, -11.60323], [27.04351, -11.61312], [26.88687, -12.01868], [26.01777, -11.91488], [25.33058, -11.65767], [25.34069, -11.19707], [24.42612, -11.44975], [24.34528, -11.06816], [24.00027, -10.89356], [24.02603, -11.15368], [23.98804, -12.13149], [24.06672, -12.29058], [23.90937, -12.844], [24.03339, -12.99091], [21.97988, -13.00148], [22.00323, -16.18028], [22.17217, -16.50269], [23.20038, -17.47563], [23.47474, -17.62877], [24.23619, -17.47489], [24.32811, -17.49082], [24.38712, -17.46818], [24.5621, -17.52963], [24.70864, -17.49501], [25.00198, -17.58221], [25.26433, -17.79571], [25.51646, -17.86232], [25.6827, -17.81987], [25.85738, -17.91403], [25.85892, -17.97726], [26.08925, -17.98168], [26.0908, -17.93021], [26.21601, -17.88608], [26.55918, -17.99638], [26.68403, -18.07411], [26.74314, -18.0199], [26.89926, -17.98756], [27.14196, -17.81398], [27.30736, -17.60487], [27.61377, -17.34378], [27.62795, -17.24365], [27.83141, -16.96274], [28.73725, -16.5528], [28.76199, -16.51575], [28.81454, -16.48611], [28.8501, -16.04537], [28.9243, -15.93987], [29.01298, -15.93805], [29.21955, -15.76589], [29.4437, -15.68702], [29.8317, -15.6126], [30.35574, -15.6513], [30.41902, -15.62269], [30.22098, -14.99447], [33.24249, -14.00019], [33.16749, -13.93992], [33.07568, -13.98447], [33.02977, -14.05022], [32.99042, -13.95689], [32.88985, -13.82956], [32.79015, -13.80755], [32.76962, -13.77224], [32.84528, -13.71576], [32.7828, -13.64805], [32.68654, -13.64268], [32.66468, -13.60019], [32.68436, -13.55769], [32.73683, -13.57682], [32.84176, -13.52794], [32.86113, -13.47292], [33.0078, -13.19492], [32.98289, -13.12671], [33.02181, -12.88707], [32.96733, -12.88251], [32.94397, -12.76868], [33.05917, -12.59554], [33.18837, -12.61377], [33.28177, -12.54692], [33.37517, -12.54085], [33.54485, -12.35996], [33.47636, -12.32498], [33.3705, -12.34931], [33.25998, -12.14242], [33.33937, -11.91252], [33.32692, -11.59248], [33.24252, -11.59302], [33.23663, -11.40637], [33.29267, -11.43536], [33.29267, -11.3789], [33.39697, -11.15296], [33.25998, -10.88862], [33.28022, -10.84428], [33.47636, -10.78465], [33.70675, -10.56896], [33.54797, -10.36077], [33.53863, -10.20148], [33.31297, -10.05133], [33.37902, -9.9104], [33.36581, -9.81063], [33.31517, -9.82364], [33.2095, -9.61099], [33.12144, -9.58929], [33.10163, -9.66525], [33.05485, -9.61316], [33.00256, -9.63053], [33.00476, -9.5133], [32.95389, -9.40138]]]]
+	  }
+	}, {
+	  type: "Feature",
+	  properties: {
+	    iso1A2: "ZW",
+	    iso1A3: "ZWE",
+	    iso1N3: "716",
+	    wikidata: "Q954",
+	    nameEn: "Zimbabwe",
+	    groups: ["014", "202", "002", "UN"],
+	    driveSide: "left",
+	    callingCodes: ["263"]
+	  },
+	  geometry: {
+	    type: "MultiPolygon",
+	    coordinates: [[[[30.41902, -15.62269], [30.35574, -15.6513], [29.8317, -15.6126], [29.4437, -15.68702], [29.21955, -15.76589], [29.01298, -15.93805], [28.9243, -15.93987], [28.8501, -16.04537], [28.81454, -16.48611], [28.76199, -16.51575], [28.73725, -16.5528], [27.83141, -16.96274], [27.62795, -17.24365], [27.61377, -17.34378], [27.30736, -17.60487], [27.14196, -17.81398], [26.89926, -17.98756], [26.74314, -18.0199], [26.68403, -18.07411], [26.55918, -17.99638], [26.21601, -17.88608], [26.0908, -17.93021], [26.08925, -17.98168], [25.85892, -17.97726], [25.85738, -17.91403], [25.6827, -17.81987], [25.51646, -17.86232], [25.26433, -17.79571], [25.23909, -17.90832], [25.31799, -18.07091], [25.39972, -18.12691], [25.53465, -18.39041], [25.68859, -18.56165], [25.79217, -18.6355], [25.82353, -18.82808], [25.94326, -18.90362], [25.99837, -19.02943], [25.96226, -19.08152], [26.17227, -19.53709], [26.72246, -19.92707], [27.21278, -20.08244], [27.29831, -20.28935], [27.28865, -20.49873], [27.69361, -20.48531], [27.72972, -20.51735], [27.69171, -21.08409], [27.91407, -21.31621], [28.01669, -21.57624], [28.29416, -21.59037], [28.49942, -21.66634], [28.58114, -21.63455], [29.07763, -21.81877], [29.04023, -21.85864], [29.02191, -21.90647], [29.02191, -21.95665], [29.04108, -22.00563], [29.08495, -22.04867], [29.14501, -22.07275], [29.1974, -22.07472], [29.24648, -22.05967], [29.3533, -22.18363], [29.37703, -22.19581], [29.64609, -22.12917], [29.76848, -22.14128], [29.92242, -22.19408], [30.13147, -22.30841], [30.2265, -22.2961], [30.28351, -22.35587], [30.38614, -22.34533], [30.48686, -22.31368], [30.6294, -22.32599], [30.86696, -22.28907], [31.08932, -22.34884], [31.16344, -22.32599], [31.30611, -22.422], [31.38336, -22.36919], [32.41234, -21.31246], [32.48236, -21.32873], [32.37115, -21.133], [32.51644, -20.91929], [32.48122, -20.63319], [32.55167, -20.56312], [32.66174, -20.56106], [32.85987, -20.27841], [32.85987, -20.16686], [32.93032, -20.03868], [33.01178, -20.02007], [33.06461, -19.77787], [32.95013, -19.67219], [32.84666, -19.68462], [32.84446, -19.48343], [32.78282, -19.47513], [32.77966, -19.36098], [32.85107, -19.29238], [32.87088, -19.09279], [32.84006, -19.0262], [32.72118, -19.02204], [32.69917, -18.94293], [32.73439, -18.92628], [32.70137, -18.84712], [32.82465, -18.77419], [32.9017, -18.7992], [32.95013, -18.69079], [32.88629, -18.58023], [32.88629, -18.51344], [33.02278, -18.4696], [33.03159, -18.35054], [32.94133, -17.99705], [33.0492, -17.60298], [32.98536, -17.55891], [32.96554, -17.48964], [33.0426, -17.3468], [33.00517, -17.30477], [32.96554, -17.11971], [32.84113, -16.92259], [32.91051, -16.89446], [32.97655, -16.70689], [32.78943, -16.70267], [32.69917, -16.66893], [32.71017, -16.59932], [32.42838, -16.4727], [32.28529, -16.43892], [32.02772, -16.43892], [31.91324, -16.41569], [31.90223, -16.34388], [31.67988, -16.19595], [31.42451, -16.15154], [31.30563, -16.01193], [31.13171, -15.98019], [30.97761, -16.05848], [30.91597, -15.99924], [30.42568, -15.9962], [30.41902, -15.62269]]]]
+	  }
+	}];
+	var borders_default = {
+	  type: type,
+	  features: features
+	}; // src/country-coder.ts
 
-	// returns an selector to select entity ids for:
-	//  - entityIDs passed in
-	//  - shallow descendant entityIDs for any of those entities that are relations
-	function utilEntityOrMemberSelector(ids, graph) {
-	    var seen = new Set(ids);
-	    ids.forEach(collectShallowDescendants);
-	    return utilEntitySelector(Array.from(seen));
+	var borders = borders_default;
+	var whichPolygonGetter = {};
+	var featuresByCode = {};
+	var idFilterRegex = /(?=(?!^(and|the|of|el|la|de)$))(\b(and|the|of|el|la|de)\b)|[-_ .,'()&[\]/]/gi;
 
-	    function collectShallowDescendants(id) {
-	        var entity = graph.hasEntity(id);
-	        if (!entity || entity.type !== 'relation') { return; }
+	function canonicalID(id) {
+	  var s = id || "";
 
-	        entity.members
-	            .map(function(member) { return member.id; })
-	            .forEach(function(id) { seen.add(id); });
-	    }
+	  if (s.charAt(0) === ".") {
+	    return s.toUpperCase();
+	  } else {
+	    return s.replace(idFilterRegex, "").toUpperCase();
+	  }
 	}
 
+	var levels = ["subterritory", "territory", "subcountryGroup", "country", "sharedLandform", "intermediateRegion", "subregion", "region", "subunion", "union", "unitedNations", "world"];
+	loadDerivedDataAndCaches(borders);
 
-	// returns an selector to select entity ids for:
-	//  - entityIDs passed in
-	//  - deep descendant entityIDs for any of those entities that are relations
-	function utilEntityOrDeepMemberSelector(ids, graph) {
-	    return utilEntitySelector(utilEntityAndDeepMemberIDs(ids, graph));
-	}
+	function loadDerivedDataAndCaches(borders2) {
+	  var identifierProps = ["iso1A2", "iso1A3", "m49", "wikidata", "emojiFlag", "ccTLD", "nameEn"];
+	  var geometryFeatures = [];
 
+	  for (var i in borders2.features) {
+	    var feature2 = borders2.features[i];
+	    feature2.properties.id = feature2.properties.iso1A2 || feature2.properties.m49 || feature2.properties.wikidata;
+	    loadM49(feature2);
+	    loadTLD(feature2);
+	    loadIsoStatus(feature2);
+	    loadLevel(feature2);
+	    loadGroups(feature2);
+	    loadFlag(feature2);
+	    cacheFeatureByIDs(feature2);
+	    if (feature2.geometry) geometryFeatures.push(feature2);
+	  }
+
+	  for (var _i in borders2.features) {
+	    var _feature = borders2.features[_i];
+	    _feature.properties.groups = _feature.properties.groups.map(function (groupID) {
+	      return featuresByCode[groupID].properties.id;
+	    });
+	    loadMembersForGroupsOf(_feature);
+	  }
+
+	  for (var _i2 in borders2.features) {
+	    var _feature2 = borders2.features[_i2];
+	    loadRoadSpeedUnit(_feature2);
+	    loadRoadHeightUnit(_feature2);
+	    loadDriveSide(_feature2);
+	    loadCallingCodes(_feature2);
+	    loadGroupGroups(_feature2);
+	  }
 
-	// returns an selector to select entity ids for:
-	//  - entityIDs passed in
-	//  - deep descendant entityIDs for any of those entities that are relations
-	function utilEntityAndDeepMemberIDs(ids, graph) {
-	    var seen = new Set();
-	    ids.forEach(collectDeepDescendants);
-	    return Array.from(seen);
+	  for (var _i3 in borders2.features) {
+	    var _feature3 = borders2.features[_i3];
 
-	    function collectDeepDescendants(id) {
-	        if (seen.has(id)) { return; }
-	        seen.add(id);
+	    _feature3.properties.groups.sort(function (groupID1, groupID2) {
+	      return levels.indexOf(featuresByCode[groupID1].properties.level) - levels.indexOf(featuresByCode[groupID2].properties.level);
+	    });
 
-	        var entity = graph.hasEntity(id);
-	        if (!entity || entity.type !== 'relation') { return; }
+	    if (_feature3.properties.members) _feature3.properties.members.sort(function (id1, id2) {
+	      var diff = levels.indexOf(featuresByCode[id1].properties.level) - levels.indexOf(featuresByCode[id2].properties.level);
 
-	        entity.members
-	            .map(function(member) { return member.id; })
-	            .forEach(collectDeepDescendants);   // recurse
-	    }
-	}
+	      if (diff === 0) {
+	        return borders2.features.indexOf(featuresByCode[id1]) - borders2.features.indexOf(featuresByCode[id2]);
+	      }
 
-	// returns an selector to select entity ids for:
-	//  - deep descendant entityIDs for any of those entities that are relations
-	function utilDeepMemberSelector(ids, graph, skipMultipolgonMembers) {
-	    var idsSet = new Set(ids);
-	    var seen = new Set();
-	    var returners = new Set();
-	    ids.forEach(collectDeepDescendants);
-	    return utilEntitySelector(Array.from(returners));
+	      return diff;
+	    });
+	  }
 
-	    function collectDeepDescendants(id) {
-	        if (seen.has(id)) { return; }
-	        seen.add(id);
+	  var geometryOnlyCollection = {
+	    type: "FeatureCollection",
+	    features: geometryFeatures
+	  };
+	  whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);
 
-	        if (!idsSet.has(id)) {
-	            returners.add(id);
-	        }
+	  function loadGroups(feature2) {
+	    var props = feature2.properties;
 
-	        var entity = graph.hasEntity(id);
-	        if (!entity || entity.type !== 'relation') { return; }
-	        if (skipMultipolgonMembers && entity.isMultipolygon()) { return; }
-	        entity.members
-	            .map(function(member) { return member.id; })
-	            .forEach(collectDeepDescendants);   // recurse
+	    if (!props.groups) {
+	      props.groups = [];
 	    }
-	}
 
+	    if (feature2.geometry && props.country) {
+	      props.groups.push(props.country);
+	    }
 
-	// Adds or removes highlight styling for the specified entities
-	function utilHighlightEntities(ids, highlighted, context) {
-	    context.surface()
-	        .selectAll(utilEntityOrDeepMemberSelector(ids, context.graph()))
-	        .classed('highlighted', highlighted);
-	}
+	    if (props.m49 !== "001") {
+	      props.groups.push("001");
+	    }
+	  }
 
+	  function loadM49(feature2) {
+	    var props = feature2.properties;
 
-	// returns an Array that is the union of:
-	//  - nodes for any nodeIDs passed in
-	//  - child nodes of any wayIDs passed in
-	//  - descendant member and child nodes of relationIDs passed in
-	function utilGetAllNodes(ids, graph) {
-	    var seen = new Set();
-	    var nodes = new Set();
+	    if (!props.m49 && props.iso1N3) {
+	      props.m49 = props.iso1N3;
+	    }
+	  }
 
-	    ids.forEach(collectNodes);
-	    return Array.from(nodes);
+	  function loadTLD(feature2) {
+	    var props = feature2.properties;
+	    if (props.level === "unitedNations") return;
 
-	    function collectNodes(id) {
-	        if (seen.has(id)) { return; }
-	        seen.add(id);
+	    if (!props.ccTLD && props.iso1A2) {
+	      props.ccTLD = "." + props.iso1A2.toLowerCase();
+	    }
+	  }
 
-	        var entity = graph.hasEntity(id);
-	        if (!entity) { return; }
+	  function loadIsoStatus(feature2) {
+	    var props = feature2.properties;
 
-	        if (entity.type === 'node') {
-	            nodes.add(entity);
-	        } else if (entity.type === 'way') {
-	            entity.nodes.forEach(collectNodes);
-	        } else {
-	            entity.members
-	                .map(function(member) { return member.id; })
-	                .forEach(collectNodes);   // recurse
-	        }
+	    if (!props.isoStatus && props.iso1A2) {
+	      props.isoStatus = "official";
 	    }
-	}
-
+	  }
 
-	function utilDisplayName(entity) {
-	    var localizedNameKey = 'name:' + _mainLocalizer.languageCode().toLowerCase();
-	    var name = entity.tags[localizedNameKey] || entity.tags.name || '';
-	    var network = entity.tags.cycle_network || entity.tags.network;
+	  function loadLevel(feature2) {
+	    var props = feature2.properties;
+	    if (props.level) return;
 
-	    if (!name && entity.tags.ref) {
-	        name = entity.tags.ref;
-	        if (network) {
-	            name = network + ' ' + name;
-	        }
+	    if (!props.country) {
+	      props.level = "country";
+	    } else if (!props.iso1A2 || props.isoStatus === "official") {
+	      props.level = "territory";
+	    } else {
+	      props.level = "subterritory";
 	    }
+	  }
 
-	    return name;
-	}
+	  function loadGroupGroups(feature2) {
+	    var props = feature2.properties;
+	    if (feature2.geometry || !props.members) return;
+	    var featureLevelIndex = levels.indexOf(props.level);
+	    var sharedGroups = [];
 
+	    var _loop = function _loop(_i4) {
+	      var memberID = props.members[_i4];
+	      var member = featuresByCode[memberID];
+	      var memberGroups = member.properties.groups.filter(function (groupID) {
+	        return groupID !== feature2.properties.id && featureLevelIndex < levels.indexOf(featuresByCode[groupID].properties.level);
+	      });
 
-	function utilDisplayNameForPath(entity) {
-	    var name = utilDisplayName(entity);
-	    var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;
+	      if (_i4 === "0") {
+	        sharedGroups = memberGroups;
+	      } else {
+	        sharedGroups = sharedGroups.filter(function (groupID) {
+	          return memberGroups.indexOf(groupID) !== -1;
+	        });
+	      }
+	    };
 
-	    if (!isFirefox && name && rtlRegex.test(name)) {
-	        name = fixRTLTextForSvg(name);
+	    for (var _i4 in props.members) {
+	      _loop(_i4);
 	    }
 
-	    return name;
-	}
+	    props.groups = props.groups.concat(sharedGroups.filter(function (groupID) {
+	      return props.groups.indexOf(groupID) === -1;
+	    }));
 
+	    for (var j in sharedGroups) {
+	      var groupFeature = featuresByCode[sharedGroups[j]];
 
-	function utilDisplayType(id) {
-	    return {
-	        n: _t('inspector.node'),
-	        w: _t('inspector.way'),
-	        r: _t('inspector.relation')
-	    }[id.charAt(0)];
-	}
+	      if (groupFeature.properties.members.indexOf(props.id) === -1) {
+	        groupFeature.properties.members.push(props.id);
+	      }
+	    }
+	  }
 
+	  function loadRoadSpeedUnit(feature2) {
+	    var props = feature2.properties;
 
-	function utilDisplayLabel(entity, graph) {
-	    var displayName = utilDisplayName(entity);
-	    if (displayName) {
-	        // use the display name if there is one
-	        return displayName;
+	    if (feature2.geometry) {
+	      if (!props.roadSpeedUnit) props.roadSpeedUnit = "km/h";
+	    } else if (props.members) {
+	      var vals = Array.from(new Set(props.members.map(function (id) {
+	        var member = featuresByCode[id];
+	        if (member.geometry) return member.properties.roadSpeedUnit || "km/h";
+	      }).filter(Boolean)));
+	      if (vals.length === 1) props.roadSpeedUnit = vals[0];
 	    }
-	    var preset = _mainPresetIndex.match(entity, graph);
-	    if (preset && preset.name()) {
-	        // use the preset name if there is a match
-	        return preset.name();
-	    }
-	    // fallback to the display type (node/way/relation)
-	    return utilDisplayType(entity.id);
-	}
+	  }
 
+	  function loadRoadHeightUnit(feature2) {
+	    var props = feature2.properties;
 
-	function utilEntityRoot(entityType) {
-	    return {
-	        node: 'n',
-	        way: 'w',
-	        relation: 'r'
-	    }[entityType];
-	}
+	    if (feature2.geometry) {
+	      if (!props.roadHeightUnit) props.roadHeightUnit = "m";
+	    } else if (props.members) {
+	      var vals = Array.from(new Set(props.members.map(function (id) {
+	        var member = featuresByCode[id];
+	        if (member.geometry) return member.properties.roadHeightUnit || "m";
+	      }).filter(Boolean)));
+	      if (vals.length === 1) props.roadHeightUnit = vals[0];
+	    }
+	  }
 
+	  function loadDriveSide(feature2) {
+	    var props = feature2.properties;
 
-	// Returns a single object containing the tags of all the given entities.
-	// Example:
-	// {
-	//   highway: 'service',
-	//   service: 'parking_aisle'
-	// }
-	//           +
-	// {
-	//   highway: 'service',
-	//   service: 'driveway',
-	//   width: '3'
-	// }
-	//           =
-	// {
-	//   highway: 'service',
-	//   service: [ 'driveway', 'parking_aisle' ],
-	//   width: [ '3', undefined ]
-	// }
-	function utilCombinedTags(entityIDs, graph) {
+	    if (feature2.geometry) {
+	      if (!props.driveSide) props.driveSide = "right";
+	    } else if (props.members) {
+	      var vals = Array.from(new Set(props.members.map(function (id) {
+	        var member = featuresByCode[id];
+	        if (member.geometry) return member.properties.driveSide || "right";
+	      }).filter(Boolean)));
+	      if (vals.length === 1) props.driveSide = vals[0];
+	    }
+	  }
 
-	    var tags = {};
-	    var tagCounts = {};
-	    var allKeys = new Set();
+	  function loadCallingCodes(feature2) {
+	    var props = feature2.properties;
 
-	    var entities = entityIDs.map(function(entityID) {
-	        return graph.hasEntity(entityID);
-	    }).filter(Boolean);
+	    if (!feature2.geometry && props.members) {
+	      props.callingCodes = Array.from(new Set(props.members.reduce(function (array, id) {
+	        var member = featuresByCode[id];
+	        if (member.geometry && member.properties.callingCodes) return array.concat(member.properties.callingCodes);
+	        return array;
+	      }, [])));
+	    }
+	  }
 
-	    // gather the aggregate keys
-	    entities.forEach(function(entity) {
-	        var keys = Object.keys(entity.tags).filter(Boolean);
-	        keys.forEach(function(key) {
-	            allKeys.add(key);
-	        });
+	  function loadFlag(feature2) {
+	    if (!feature2.properties.iso1A2) return;
+	    var flag = feature2.properties.iso1A2.replace(/./g, function (_char) {
+	      return String.fromCodePoint(_char.charCodeAt(0) + 127397);
 	    });
+	    feature2.properties.emojiFlag = flag;
+	  }
 
-	    entities.forEach(function(entity) {
+	  function loadMembersForGroupsOf(feature2) {
+	    for (var j in feature2.properties.groups) {
+	      var groupID = feature2.properties.groups[j];
+	      var groupFeature = featuresByCode[groupID];
+	      if (!groupFeature.properties.members) groupFeature.properties.members = [];
+	      groupFeature.properties.members.push(feature2.properties.id);
+	    }
+	  }
 
-	        allKeys.forEach(function(key) {
+	  function cacheFeatureByIDs(feature2) {
+	    var ids = [];
 
-	            var value = entity.tags[key]; // purposely allow `undefined`
+	    for (var k in identifierProps) {
+	      var prop = identifierProps[k];
+	      var id = feature2.properties[prop];
+	      if (id) ids.push(id);
+	    }
 
-	            if (!tags.hasOwnProperty(key)) {
-	                // first value, set as raw
-	                tags[key] = value;
-	            } else {
-	                if (!Array.isArray(tags[key])) {
-	                    if (tags[key] !== value) {
-	                        // first alternate value, replace single value with array
-	                        tags[key] = [tags[key], value];
-	                    }
-	                } else { // type is array
-	                    if (tags[key].indexOf(value) === -1) {
-	                        // subsequent alternate value, add to array
-	                        tags[key].push(value);
-	                    }
-	                }
-	            }
+	    if (feature2.properties.aliases) {
+	      for (var j in feature2.properties.aliases) {
+	        ids.push(feature2.properties.aliases[j]);
+	      }
+	    }
 
-	            var tagHash = key + '=' + value;
-	            if (!tagCounts[tagHash]) { tagCounts[tagHash] = 0; }
-	            tagCounts[tagHash] += 1;
-	        });
-	    });
+	    for (var _i5 in ids) {
+	      var _id = canonicalID(ids[_i5]);
 
-	    for (var key in tags) {
-	        if (!Array.isArray(tags[key])) { continue; }
-
-	        // sort values by frequency then alphabetically
-	        tags[key] = tags[key].sort(function(val1, val2) {
-	            var key = key; // capture
-	            var count2 = tagCounts[key + '=' + val2];
-	            var count1 = tagCounts[key + '=' + val1];
-	            if (count2 !== count1) {
-	                return count2 - count1;
-	            }
-	            if (val2 && val1) {
-	                return val1.localeCompare(val2);
-	            }
-	            return val1 ? 1 : -1;
-	        });
+	      featuresByCode[_id] = feature2;
 	    }
-
-	    return tags;
+	  }
 	}
 
+	function locArray(loc) {
+	  if (Array.isArray(loc)) {
+	    return loc;
+	  } else if (loc.coordinates) {
+	    return loc.coordinates;
+	  }
 
-	function utilStringQs(str) {
-	    var i = 0;  // advance past any leading '?' or '#' characters
-	    while (i < str.length && (str[i] === '?' || str[i] === '#')) { i++; }
-	    str = str.slice(i);
-
-	    return str.split('&').reduce(function(obj, pair){
-	        var parts = pair.split('=');
-	        if (parts.length === 2) {
-	            obj[parts[0]] = (null === parts[1]) ? '' : decodeURIComponent(parts[1]);
-	        }
-	        return obj;
-	    }, {});
+	  return loc.geometry.coordinates;
 	}
 
+	function smallestFeature(loc) {
+	  var query = locArray(loc);
+	  var featureProperties = whichPolygonGetter(query);
+	  if (!featureProperties) return null;
+	  return featuresByCode[featureProperties.id];
+	}
 
-	function utilQsString(obj, noencode) {
-	    // encode everything except special characters used in certain hash parameters:
-	    // "/" in map states, ":", ",", {" and "}" in background
-	    function softEncode(s) {
-	        return encodeURIComponent(s).replace(/(%2F|%3A|%2C|%7B|%7D)/g, decodeURIComponent);
-	    }
-
-	    return Object.keys(obj).sort().map(function(key) {
-	        return encodeURIComponent(key) + '=' + (
-	            noencode ? softEncode(obj[key]) : encodeURIComponent(obj[key]));
-	    }).join('&');
+	function countryFeature(loc) {
+	  var feature2 = smallestFeature(loc);
+	  if (!feature2) return null;
+	  var countryCode = feature2.properties.country || feature2.properties.iso1A2;
+	  return featuresByCode[countryCode] || null;
 	}
 
+	var defaultOpts = {
+	  level: void 0,
+	  maxLevel: void 0,
+	  withProp: void 0
+	};
 
-	function utilPrefixDOMProperty(property) {
-	    var prefixes = ['webkit', 'ms', 'moz', 'o'];
-	    var i = -1;
-	    var n = prefixes.length;
-	    var s = document.body;
+	function featureForLoc(loc, opts) {
+	  var targetLevel = opts.level || "country";
+	  var maxLevel = opts.maxLevel || "world";
+	  var withProp = opts.withProp;
+	  var targetLevelIndex = levels.indexOf(targetLevel);
+	  if (targetLevelIndex === -1) return null;
+	  var maxLevelIndex = levels.indexOf(maxLevel);
+	  if (maxLevelIndex === -1) return null;
+	  if (maxLevelIndex < targetLevelIndex) return null;
+
+	  if (targetLevel === "country") {
+	    var fastFeature = countryFeature(loc);
+
+	    if (fastFeature) {
+	      if (!withProp || fastFeature.properties[withProp]) {
+	        return fastFeature;
+	      }
+	    }
+	  }
 
-	    if (property in s)
-	        { return property; }
+	  var features2 = featuresContaining(loc);
 
-	    property = property.substr(0, 1).toUpperCase() + property.substr(1);
+	  for (var i in features2) {
+	    var feature2 = features2[i];
+	    var levelIndex = levels.indexOf(feature2.properties.level);
 
-	    while (++i < n) {
-	        if (prefixes[i] + property in s) {
-	            return prefixes[i] + property;
-	        }
+	    if (feature2.properties.level === targetLevel || levelIndex > targetLevelIndex && levelIndex <= maxLevelIndex) {
+	      if (!withProp || feature2.properties[withProp]) {
+	        return feature2;
+	      }
 	    }
+	  }
 
-	    return false;
+	  return null;
 	}
 
+	function featureForID(id) {
+	  var stringID;
 
-	function utilPrefixCSSProperty(property) {
-	    var prefixes = ['webkit', 'ms', 'Moz', 'O'];
-	    var i = -1;
-	    var n = prefixes.length;
-	    var s = document.body.style;
-
-	    if (property.toLowerCase() in s) {
-	        return property.toLowerCase();
-	    }
+	  if (typeof id === "number") {
+	    stringID = id.toString();
 
-	    while (++i < n) {
-	        if (prefixes[i] + property in s) {
-	            return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
-	        }
+	    if (stringID.length === 1) {
+	      stringID = "00" + stringID;
+	    } else if (stringID.length === 2) {
+	      stringID = "0" + stringID;
 	    }
+	  } else {
+	    stringID = canonicalID(id);
+	  }
 
-	    return false;
+	  return featuresByCode[stringID] || null;
 	}
 
-
-	var transformProperty;
-	function utilSetTransform(el, x, y, scale) {
-	    var prop = transformProperty = transformProperty || utilPrefixCSSProperty('Transform');
-	    var translate = utilDetect().opera ? 'translate('   + x + 'px,' + y + 'px)'
-	        : 'translate3d(' + x + 'px,' + y + 'px,0)';
-	    return el.style(prop, translate + (scale ? ' scale(' + scale + ')' : ''));
+	function smallestFeaturesForBbox(bbox) {
+	  return whichPolygonGetter.bbox(bbox).map(function (props) {
+	    return featuresByCode[props.id];
+	  });
 	}
 
+	function smallestOrMatchingFeature(query) {
+	  if (_typeof(query) === "object") {
+	    return smallestFeature(query);
+	  }
 
-	// Calculates Levenshtein distance between two strings
-	// see:  https://en.wikipedia.org/wiki/Levenshtein_distance
-	// first converts the strings to lowercase and replaces diacritic marks with ascii equivalents.
-	function utilEditDistance(a, b) {
-	    a = remove$1(a.toLowerCase());
-	    b = remove$1(b.toLowerCase());
-	    if (a.length === 0) { return b.length; }
-	    if (b.length === 0) { return a.length; }
-	    var matrix = [];
-	    for (var i = 0; i <= b.length; i++) { matrix[i] = [i]; }
-	    for (var j = 0; j <= a.length; j++) { matrix[0][j] = j; }
-	    for (i = 1; i <= b.length; i++) {
-	        for (j = 1; j <= a.length; j++) {
-	            if (b.charAt(i-1) === a.charAt(j-1)) {
-	                matrix[i][j] = matrix[i-1][j-1];
-	            } else {
-	                matrix[i][j] = Math.min(matrix[i-1][j-1] + 1, // substitution
-	                    Math.min(matrix[i][j-1] + 1, // insertion
-	                    matrix[i-1][j] + 1)); // deletion
-	            }
-	        }
-	    }
-	    return matrix[b.length][a.length];
+	  return featureForID(query);
 	}
 
+	function feature$1(query) {
+	  var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultOpts;
 
-	// a d3.mouse-alike which
-	// 1. Only works on HTML elements, not SVG
-	// 2. Does not cause style recalculation
-	function utilFastMouse(container) {
-	    var rect = container.getBoundingClientRect();
-	    var rectLeft = rect.left;
-	    var rectTop = rect.top;
-	    var clientLeft = +container.clientLeft;
-	    var clientTop = +container.clientTop;
-	    return function(e) {
-	        return [
-	            e.clientX - rectLeft - clientLeft,
-	            e.clientY - rectTop - clientTop];
-	    };
-	}
-
+	  if (_typeof(query) === "object") {
+	    return featureForLoc(query, opts);
+	  }
 
-	function utilAsyncMap(inputs, func, callback) {
-	    var remaining = inputs.length;
-	    var results = [];
-	    var errors = [];
-
-	    inputs.forEach(function(d, i) {
-	        func(d, function done(err, data) {
-	            errors[i] = err;
-	            results[i] = data;
-	            remaining--;
-	            if (!remaining) { callback(errors, results); }
-	        });
-	    });
+	  return featureForID(query);
 	}
 
-
-	// wraps an index to an interval [0..length-1]
-	function utilWrap(index, length) {
-	    if (index < 0) {
-	        index += Math.ceil(-index/length)*length;
-	    }
-	    return index % length;
+	function iso1A2Code(query) {
+	  var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultOpts;
+	  opts.withProp = "iso1A2";
+	  var match = feature$1(query, opts);
+	  if (!match) return null;
+	  return match.properties.iso1A2 || null;
 	}
 
+	function featuresContaining(query, strict) {
+	  var matchingFeatures;
 
-	/**
-	 * a replacement for functor
-	 *
-	 * @param {*} value any value
-	 * @returns {Function} a function that returns that value or the value if it's a function
-	 */
-	function utilFunctor(value) {
-	    if (typeof value === 'function') { return value; }
-	    return function() {
-	        return value;
-	    };
-	}
+	  if (Array.isArray(query) && query.length === 4) {
+	    matchingFeatures = smallestFeaturesForBbox(query);
+	  } else {
+	    var smallestOrMatching = smallestOrMatchingFeature(query);
+	    matchingFeatures = smallestOrMatching ? [smallestOrMatching] : [];
+	  }
 
+	  if (!matchingFeatures.length) return [];
+	  var returnFeatures;
 
-	function utilNoAuto(selection) {
-	    var isText = (selection.size() && selection.node().tagName.toLowerCase() === 'textarea');
+	  if (!strict || _typeof(query) === "object") {
+	    returnFeatures = matchingFeatures.slice();
+	  } else {
+	    returnFeatures = [];
+	  }
 
-	    return selection
-	        // assign 'new-password' even for non-password fields to prevent browsers (Chrome) ignoring 'off'
-	        .attr('autocomplete', 'new-password')
-	        .attr('autocorrect', 'off')
-	        .attr('autocapitalize', 'off')
-	        .attr('spellcheck', isText ? 'true' : 'false');
-	}
+	  for (var j in matchingFeatures) {
+	    var properties = matchingFeatures[j].properties;
 
+	    for (var i in properties.groups) {
+	      var groupID = properties.groups[i];
+	      var groupFeature = featuresByCode[groupID];
 
-	// https://stackoverflow.com/questions/194846/is-there-any-kind-of-hash-code-function-in-javascript
-	// https://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
-	function utilHashcode(str) {
-	    var hash = 0;
-	    if (str.length === 0) {
-	        return hash;
-	    }
-	    for (var i = 0; i < str.length; i++) {
-	        var char = str.charCodeAt(i);
-	        hash = ((hash << 5) - hash) + char;
-	        hash = hash & hash; // Convert to 32bit integer
+	      if (returnFeatures.indexOf(groupFeature) === -1) {
+	        returnFeatures.push(groupFeature);
+	      }
 	    }
-	    return hash;
-	}
-
-	// Returns version of `str` with all runs of special characters replaced by `_`;
-	// suitable for HTML ids, classes, selectors, etc.
-	function utilSafeClassName(str) {
-	    return str.toLowerCase().replace(/[^a-z0-9]+/g, '_');
-	}
+	  }
 
-	// Returns string based on `val` that is highly unlikely to collide with an id
-	// used previously or that's present elsewhere in the document. Useful for preventing
-	// browser-provided autofills or when embedding iD on pages with unknown elements.
-	function utilUniqueDomId(val) {
-	    return 'ideditor-' + utilSafeClassName(val.toString()) + '-' + new Date().getTime().toString();
+	  return returnFeatures;
 	}
 
-	// Returns the length of `str` in unicode characters. This can be less than
-	// `String.length()` since a single unicode character can be composed of multiple
-	// JavaScript UTF-16 code units.
-	function utilUnicodeCharsCount(str) {
-	    // Native ES2015 implementations of `Array.from` split strings into unicode characters
-	    return Array.from(str).length;
-	}
+	function featuresIn(id, strict) {
+	  var feature2 = featureForID(id);
+	  if (!feature2) return [];
+	  var features2 = [];
 
-	// Returns a new string representing `str` cut from its start to `limit` length
-	// in unicode characters. Note that this runs the risk of splitting graphemes.
-	function utilUnicodeCharsTruncated(str, limit) {
-	    return Array.from(str).slice(0, limit).join('');
-	}
+	  if (!strict) {
+	    features2.push(feature2);
+	  }
 
-	function osmEntity(attrs) {
-	    // For prototypal inheritance.
-	    if (this instanceof osmEntity) { return; }
+	  var properties = feature2.properties;
 
-	    // Create the appropriate subtype.
-	    if (attrs && attrs.type) {
-	        return osmEntity[attrs.type].apply(this, arguments);
-	    } else if (attrs && attrs.id) {
-	        return osmEntity[osmEntity.id.type(attrs.id)].apply(this, arguments);
+	  if (properties.members) {
+	    for (var i in properties.members) {
+	      var memberID = properties.members[i];
+	      features2.push(featuresByCode[memberID]);
 	    }
+	  }
 
-	    // Initialize a generic Entity (used only in tests).
-	    return (new osmEntity()).initialize(arguments);
+	  return features2;
 	}
 
+	function aggregateFeature(id) {
+	  var features2 = featuresIn(id, false);
+	  if (features2.length === 0) return null;
+	  var aggregateCoordinates = [];
 
-	osmEntity.id = function(type) {
-	    return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
-	};
+	  for (var i in features2) {
+	    var feature2 = features2[i];
 
+	    if (feature2.geometry && feature2.geometry.type === "MultiPolygon" && feature2.geometry.coordinates) {
+	      aggregateCoordinates = aggregateCoordinates.concat(feature2.geometry.coordinates);
+	    }
+	  }
 
-	osmEntity.id.next = {
-	    changeset: -1, node: -1, way: -1, relation: -1
-	};
+	  return {
+	    type: "Feature",
+	    properties: features2[0].properties,
+	    geometry: {
+	      type: "MultiPolygon",
+	      coordinates: aggregateCoordinates
+	    }
+	  };
+	}
 
+	function roadSpeedUnit(query) {
+	  var feature2 = smallestOrMatchingFeature(query);
+	  return feature2 && feature2.properties.roadSpeedUnit || null;
+	}
 
-	osmEntity.id.fromOSM = function(type, id) {
-	    return type[0] + id;
-	};
+	function roadHeightUnit(query) {
+	  var feature2 = smallestOrMatchingFeature(query);
+	  return feature2 && feature2.properties.roadHeightUnit || null;
+	}
 
+	var geojsonArea = {};
 
-	osmEntity.id.toOSM = function(id) {
-	    return id.slice(1);
-	};
+	var wgs84$1 = {};
 
+	wgs84$1.RADIUS = 6378137;
+	wgs84$1.FLATTENING = 1 / 298.257223563;
+	wgs84$1.POLAR_RADIUS = 6356752.3142;
 
-	osmEntity.id.type = function(id) {
-	    return { 'c': 'changeset', 'n': 'node', 'w': 'way', 'r': 'relation' }[id[0]];
-	};
+	var wgs84 = wgs84$1;
+	geojsonArea.geometry = geometry;
+	geojsonArea.ring = ringArea;
 
+	function geometry(_) {
+	  var area = 0,
+	      i;
 
-	// A function suitable for use as the second argument to d3.selection#data().
-	osmEntity.key = function(entity) {
-	    return entity.id + 'v' + (entity.v || 0);
-	};
+	  switch (_.type) {
+	    case 'Polygon':
+	      return polygonArea(_.coordinates);
 
-	var _deprecatedTagValuesByKey;
+	    case 'MultiPolygon':
+	      for (i = 0; i < _.coordinates.length; i++) {
+	        area += polygonArea(_.coordinates[i]);
+	      }
 
-	osmEntity.deprecatedTagValuesByKey = function(dataDeprecated) {
-	    if (!_deprecatedTagValuesByKey) {
-	        _deprecatedTagValuesByKey = {};
-	        dataDeprecated.forEach(function(d) {
-	            var oldKeys = Object.keys(d.old);
-	            if (oldKeys.length === 1) {
-	                var oldKey = oldKeys[0];
-	                var oldValue = d.old[oldKey];
-	                if (oldValue !== '*') {
-	                    if (!_deprecatedTagValuesByKey[oldKey]) {
-	                        _deprecatedTagValuesByKey[oldKey] = [oldValue];
-	                    } else {
-	                        _deprecatedTagValuesByKey[oldKey].push(oldValue);
-	                    }
-	                }
-	            }
-	        });
-	    }
-	    return _deprecatedTagValuesByKey;
-	};
+	      return area;
 
+	    case 'Point':
+	    case 'MultiPoint':
+	    case 'LineString':
+	    case 'MultiLineString':
+	      return 0;
 
-	osmEntity.prototype = {
+	    case 'GeometryCollection':
+	      for (i = 0; i < _.geometries.length; i++) {
+	        area += geometry(_.geometries[i]);
+	      }
 
-	    tags: {},
+	      return area;
+	  }
+	}
 
+	function polygonArea(coords) {
+	  var area = 0;
 
-	    initialize: function(sources) {
-	        for (var i = 0; i < sources.length; ++i) {
-	            var source = sources[i];
-	            for (var prop in source) {
-	                if (Object.prototype.hasOwnProperty.call(source, prop)) {
-	                    if (source[prop] === undefined) {
-	                        delete this[prop];
-	                    } else {
-	                        this[prop] = source[prop];
-	                    }
-	                }
-	            }
-	        }
+	  if (coords && coords.length > 0) {
+	    area += Math.abs(ringArea(coords[0]));
 
-	        if (!this.id && this.type) {
-	            this.id = osmEntity.id(this.type);
-	        }
-	        if (!this.hasOwnProperty('visible')) {
-	            this.visible = true;
-	        }
+	    for (var i = 1; i < coords.length; i++) {
+	      area -= Math.abs(ringArea(coords[i]));
+	    }
+	  }
 
-	        return this;
-	    },
+	  return area;
+	}
+	/**
+	 * Calculate the approximate area of the polygon were it projected onto
+	 *     the earth.  Note that this area will be positive if ring is oriented
+	 *     clockwise, otherwise it will be negative.
+	 *
+	 * Reference:
+	 * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
+	 *     Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
+	 *     Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
+	 *
+	 * Returns:
+	 * {float} The approximate signed geodesic area of the polygon in square
+	 *     meters.
+	 */
 
 
-	    copy: function(resolver, copies) {
-	        if (copies[this.id])
-	            { return copies[this.id]; }
+	function ringArea(coords) {
+	  var p1,
+	      p2,
+	      p3,
+	      lowerIndex,
+	      middleIndex,
+	      upperIndex,
+	      i,
+	      area = 0,
+	      coordsLength = coords.length;
+
+	  if (coordsLength > 2) {
+	    for (i = 0; i < coordsLength; i++) {
+	      if (i === coordsLength - 2) {
+	        // i = N-2
+	        lowerIndex = coordsLength - 2;
+	        middleIndex = coordsLength - 1;
+	        upperIndex = 0;
+	      } else if (i === coordsLength - 1) {
+	        // i = N-1
+	        lowerIndex = coordsLength - 1;
+	        middleIndex = 0;
+	        upperIndex = 1;
+	      } else {
+	        // i = 0 to N-3
+	        lowerIndex = i;
+	        middleIndex = i + 1;
+	        upperIndex = i + 2;
+	      }
 
-	        var copy = osmEntity(this, { id: undefined, user: undefined, version: undefined });
-	        copies[this.id] = copy;
+	      p1 = coords[lowerIndex];
+	      p2 = coords[middleIndex];
+	      p3 = coords[upperIndex];
+	      area += (rad(p3[0]) - rad(p1[0])) * Math.sin(rad(p2[1]));
+	    }
 
-	        return copy;
-	    },
+	    area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
+	  }
 
+	  return area;
+	}
 
-	    osmId: function() {
-	        return osmEntity.id.toOSM(this.id);
-	    },
+	function rad(_) {
+	  return _ * Math.PI / 180;
+	}
 
+	var inputValidation = {};
 
-	    isNew: function() {
-	        return this.osmId() < 0;
-	    },
+	var $$n = _export;
+	var $includes = arrayIncludes.includes;
+	var addToUnscopables$2 = addToUnscopables$6;
 
+	// `Array.prototype.includes` method
+	// https://tc39.es/ecma262/#sec-array.prototype.includes
+	$$n({ target: 'Array', proto: true }, {
+	  includes: function includes(el /* , fromIndex = 0 */) {
+	    return $includes(this, el, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	    update: function(attrs) {
-	        return osmEntity(this, attrs, { v: 1 + (this.v || 0) });
-	    },
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables$2('includes');
 
+	var validateCenter$1 = {};
 
-	    mergeTags: function(tags) {
-	        var merged = Object.assign({}, this.tags);   // shallow copy
-	        var changed = false;
-	        for (var k in tags) {
-	            var t1 = merged[k];
-	            var t2 = tags[k];
-	            if (!t1) {
-	                changed = true;
-	                merged[k] = t2;
-	            } else if (t1 !== t2) {
-	                changed = true;
-	                merged[k] = utilUnicodeCharsTruncated(
-	                    utilArrayUnion(t1.split(/;\s*/), t2.split(/;\s*/)).join(';'),
-	                    255 // avoid exceeding character limit; see also services/osm.js -> maxCharsForTagValue()
-	                );
-	            }
-	        }
-	        return changed ? this.update({ tags: merged }) : this;
-	    },
+	validateCenter$1.validateCenter = function validateCenter(center) {
+	  var validCenterLengths = [2, 3];
 
+	  if (!Array.isArray(center) || !validCenterLengths.includes(center.length)) {
+	    throw new Error("ERROR! Center has to be an array of length two or three");
+	  }
 
-	    intersects: function(extent, resolver) {
-	        return this.extent(resolver).intersects(extent);
-	    },
+	  var _center = _slicedToArray(center, 2),
+	      lng = _center[0],
+	      lat = _center[1];
 
+	  if (typeof lng !== "number" || typeof lat !== "number") {
+	    throw new Error("ERROR! Longitude and Latitude has to be numbers but where ".concat(_typeof(lng), " and ").concat(_typeof(lat)));
+	  }
 
-	    hasNonGeometryTags: function() {
-	        return Object.keys(this.tags).some(function(k) { return k !== 'area'; });
-	    },
+	  if (lng > 180 || lng < -180) {
+	    throw new Error("ERROR! Longitude has to be between -180 and 180 but was ".concat(lng));
+	  }
 
-	    hasParentRelations: function(resolver) {
-	        return resolver.parentRelations(this).length > 0;
-	    },
+	  if (lat > 90 || lat < -90) {
+	    throw new Error("ERROR! Latitude has to be between -90 and 90 but was ".concat(lat));
+	  }
+	};
 
-	    hasInterestingTags: function() {
-	        return Object.keys(this.tags).some(osmIsInterestingTag);
-	    },
+	var validateRadius$1 = {};
 
-	    hasWikidata: function() {
-	        return !!this.tags.wikidata || !!this.tags['brand:wikidata'];
-	    },
+	validateRadius$1.validateRadius = function validateRadius(radius) {
+	  if (typeof radius !== "number") {
+	    throw new Error("ERROR! Radius has to be a positive number but was: ".concat(_typeof(radius)));
+	  }
 
-	    isHighwayIntersection: function() {
-	        return false;
-	    },
+	  if (radius <= 0) {
+	    throw new Error("ERROR! Radius has to be a positive number but was: ".concat(radius));
+	  }
+	};
 
-	    isDegenerate: function() {
-	        return true;
-	    },
+	var validateNumberOfEdges$1 = {};
 
-	    deprecatedTags: function(dataDeprecated) {
-	        var tags = this.tags;
+	validateNumberOfEdges$1.validateNumberOfEdges = function validateNumberOfEdges(numberOfEdges) {
+	  if (typeof numberOfEdges !== "number") {
+	    var ARGUMENT_TYPE = Array.isArray(numberOfEdges) ? "array" : _typeof(numberOfEdges);
+	    throw new Error("ERROR! Number of edges has to be a number but was: ".concat(ARGUMENT_TYPE));
+	  }
 
-	        // if there are no tags, none can be deprecated
-	        if (Object.keys(tags).length === 0) { return []; }
+	  if (numberOfEdges < 3) {
+	    throw new Error("ERROR! Number of edges has to be at least 3 but was: ".concat(numberOfEdges));
+	  }
+	};
 
-	        var deprecated = [];
-	        dataDeprecated.forEach(function(d) {
-	            var oldKeys = Object.keys(d.old);
-	            var matchesDeprecatedTags = oldKeys.every(function(oldKey) {
-	                if (!tags[oldKey]) { return false; }
-	                if (d.old[oldKey] === '*') { return true; }
+	var validateEarthRadius$1 = {};
 
-	                var vals = tags[oldKey].split(';').filter(Boolean);
-	                if (vals.length === 0) {
-	                    return false;
-	                } else if (vals.length > 1) {
-	                    return vals.indexOf(d.old[oldKey]) !== -1;
-	                } else {
-	                    if (tags[oldKey] === d.old[oldKey]) {
-	                        if (d.replace && d.old[oldKey] === d.replace[oldKey]) {
-	                            var replaceKeys = Object.keys(d.replace);
-	                            return !replaceKeys.every(function(replaceKey) {
-	                                return tags[replaceKey] === d.replace[replaceKey];
-	                            });
-	                        } else {
-	                            return true;
-	                        }
-	                    }
-	                }
-	                return false;
-	            });
-	            if (matchesDeprecatedTags) {
-	                deprecated.push(d);
-	            }
-	        });
+	validateEarthRadius$1.validateEarthRadius = function validateEarthRadius(earthRadius) {
+	  if (typeof earthRadius !== "number") {
+	    var ARGUMENT_TYPE = Array.isArray(earthRadius) ? "array" : _typeof(earthRadius);
+	    throw new Error("ERROR! Earth radius has to be a number but was: ".concat(ARGUMENT_TYPE));
+	  }
 
-	        return deprecated;
-	    }
+	  if (earthRadius <= 0) {
+	    throw new Error("ERROR! Earth radius has to be a positive number but was: ".concat(earthRadius));
+	  }
 	};
 
-	function osmLanes(entity) {
-	    if (entity.type !== 'way') { return null; }
-	    if (!entity.tags.highway) { return null; }
+	var validateBearing$1 = {};
 
-	    var tags = entity.tags;
-	    var isOneWay = entity.isOneWay();
-	    var laneCount = getLaneCount(tags, isOneWay);
-	    var maxspeed = parseMaxspeed(tags);
-
-	    var laneDirections = parseLaneDirections(tags, isOneWay, laneCount);
-	    var forward = laneDirections.forward;
-	    var backward = laneDirections.backward;
-	    var bothways = laneDirections.bothways;
-
-	    // parse the piped string 'x|y|z' format
-	    var turnLanes = {};
-	    turnLanes.unspecified = parseTurnLanes(tags['turn:lanes']);
-	    turnLanes.forward = parseTurnLanes(tags['turn:lanes:forward']);
-	    turnLanes.backward = parseTurnLanes(tags['turn:lanes:backward']);
-
-	    var maxspeedLanes = {};
-	    maxspeedLanes.unspecified = parseMaxspeedLanes(tags['maxspeed:lanes'], maxspeed);
-	    maxspeedLanes.forward = parseMaxspeedLanes(tags['maxspeed:lanes:forward'], maxspeed);
-	    maxspeedLanes.backward = parseMaxspeedLanes(tags['maxspeed:lanes:backward'], maxspeed);
-
-	    var psvLanes = {};
-	    psvLanes.unspecified = parseMiscLanes(tags['psv:lanes']);
-	    psvLanes.forward = parseMiscLanes(tags['psv:lanes:forward']);
-	    psvLanes.backward = parseMiscLanes(tags['psv:lanes:backward']);
-
-	    var busLanes = {};
-	    busLanes.unspecified = parseMiscLanes(tags['bus:lanes']);
-	    busLanes.forward = parseMiscLanes(tags['bus:lanes:forward']);
-	    busLanes.backward = parseMiscLanes(tags['bus:lanes:backward']);
-
-	    var taxiLanes = {};
-	    taxiLanes.unspecified = parseMiscLanes(tags['taxi:lanes']);
-	    taxiLanes.forward = parseMiscLanes(tags['taxi:lanes:forward']);
-	    taxiLanes.backward = parseMiscLanes(tags['taxi:lanes:backward']);
-
-	    var hovLanes = {};
-	    hovLanes.unspecified = parseMiscLanes(tags['hov:lanes']);
-	    hovLanes.forward = parseMiscLanes(tags['hov:lanes:forward']);
-	    hovLanes.backward = parseMiscLanes(tags['hov:lanes:backward']);
-
-	    var hgvLanes = {};
-	    hgvLanes.unspecified = parseMiscLanes(tags['hgv:lanes']);
-	    hgvLanes.forward = parseMiscLanes(tags['hgv:lanes:forward']);
-	    hgvLanes.backward = parseMiscLanes(tags['hgv:lanes:backward']);
-
-	    var bicyclewayLanes = {};
-	    bicyclewayLanes.unspecified = parseBicycleWay(tags['bicycleway:lanes']);
-	    bicyclewayLanes.forward = parseBicycleWay(tags['bicycleway:lanes:forward']);
-	    bicyclewayLanes.backward = parseBicycleWay(tags['bicycleway:lanes:backward']);
-
-	    var lanesObj = {
-	        forward: [],
-	        backward: [],
-	        unspecified: []
-	    };
+	validateBearing$1.validateBearing = function validateBearing(bearing) {
+	  if (typeof bearing !== "number") {
+	    var ARGUMENT_TYPE = Array.isArray(bearing) ? "array" : _typeof(bearing);
+	    throw new Error("ERROR! Bearing has to be a number but was: ".concat(ARGUMENT_TYPE));
+	  }
+	};
 
-	    // map forward/backward/unspecified of each lane type to lanesObj
-	    mapToLanesObj(lanesObj, turnLanes, 'turnLane');
-	    mapToLanesObj(lanesObj, maxspeedLanes, 'maxspeed');
-	    mapToLanesObj(lanesObj, psvLanes, 'psv');
-	    mapToLanesObj(lanesObj, busLanes, 'bus');
-	    mapToLanesObj(lanesObj, taxiLanes, 'taxi');
-	    mapToLanesObj(lanesObj, hovLanes, 'hov');
-	    mapToLanesObj(lanesObj, hgvLanes, 'hgv');
-	    mapToLanesObj(lanesObj, bicyclewayLanes, 'bicycleway');
+	var validateCenter = validateCenter$1.validateCenter;
+	var validateRadius = validateRadius$1.validateRadius;
+	var validateNumberOfEdges = validateNumberOfEdges$1.validateNumberOfEdges;
+	var validateEarthRadius = validateEarthRadius$1.validateEarthRadius;
+	var validateBearing = validateBearing$1.validateBearing;
 
-	    return {
-	        metadata: {
-	            count: laneCount,
-	            oneway: isOneWay,
-	            forward: forward,
-	            backward: backward,
-	            bothways: bothways,
-	            turnLanes: turnLanes,
-	            maxspeed: maxspeed,
-	            maxspeedLanes: maxspeedLanes,
-	            psvLanes: psvLanes,
-	            busLanes: busLanes,
-	            taxiLanes: taxiLanes,
-	            hovLanes: hovLanes,
-	            hgvLanes: hgvLanes,
-	            bicyclewayLanes: bicyclewayLanes
-	        },
-	        lanes: lanesObj
-	    };
+	function validateInput$1(_ref) {
+	  var center = _ref.center,
+	      radius = _ref.radius,
+	      numberOfEdges = _ref.numberOfEdges,
+	      earthRadius = _ref.earthRadius,
+	      bearing = _ref.bearing;
+	  validateCenter(center);
+	  validateRadius(radius);
+	  validateNumberOfEdges(numberOfEdges);
+	  validateEarthRadius(earthRadius);
+	  validateBearing(bearing);
 	}
 
+	inputValidation.validateCenter = validateCenter;
+	inputValidation.validateRadius = validateRadius;
+	inputValidation.validateNumberOfEdges = validateNumberOfEdges;
+	inputValidation.validateEarthRadius = validateEarthRadius;
+	inputValidation.validateBearing = validateBearing;
+	inputValidation.validateInput = validateInput$1;
 
-	function getLaneCount(tags, isOneWay) {
-	    var count;
-	    if (tags.lanes) {
-	        count = parseInt(tags.lanes, 10);
-	        if (count > 0) {
-	            return count;
-	        }
-	    }
+	var validateInput = inputValidation.validateInput;
+	var defaultEarthRadius = 6378137; // equatorial Earth radius
 
+	function toRadians(angleInDegrees) {
+	  return angleInDegrees * Math.PI / 180;
+	}
 
-	    switch (tags.highway) {
-	        case 'trunk':
-	        case 'motorway':
-	            count = isOneWay ? 2 : 4;
-	            break;
-	        default:
-	            count = isOneWay ? 1 : 2;
-	            break;
-	    }
+	function toDegrees(angleInRadians) {
+	  return angleInRadians * 180 / Math.PI;
+	}
 
-	    return count;
+	function offset(c1, distance, earthRadius, bearing) {
+	  var lat1 = toRadians(c1[1]);
+	  var lon1 = toRadians(c1[0]);
+	  var dByR = distance / earthRadius;
+	  var lat = Math.asin(Math.sin(lat1) * Math.cos(dByR) + Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing));
+	  var lon = lon1 + Math.atan2(Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1), Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat));
+	  return [toDegrees(lon), toDegrees(lat)];
 	}
 
+	var circleToPolygon = function circleToPolygon(center, radius, options) {
+	  var n = getNumberOfEdges(options);
+	  var earthRadius = getEarthRadius(options);
+	  var bearing = getBearing(options);
+	  var direction = getDirection(options); // validateInput() throws error on invalid input and do nothing on valid input
 
-	function parseMaxspeed(tags) {
-	    var maxspeed = tags.maxspeed;
-	    if (!maxspeed) { return; }
+	  validateInput({
+	    center: center,
+	    radius: radius,
+	    numberOfEdges: n,
+	    earthRadius: earthRadius,
+	    bearing: bearing
+	  });
+	  var start = toRadians(bearing);
+	  var coordinates = [];
 
-	    var maxspeedRegex = /^([0-9][\.0-9]+?)(?:[ ]?(?:km\/h|kmh|kph|mph|knots))?$/;
-	    if (!maxspeedRegex.test(maxspeed)) { return; }
+	  for (var i = 0; i < n; ++i) {
+	    coordinates.push(offset(center, radius, earthRadius, start + direction * 2 * Math.PI * -i / n));
+	  }
 
-	    return parseInt(maxspeed, 10);
-	}
+	  coordinates.push(coordinates[0]);
+	  return {
+	    type: "Polygon",
+	    coordinates: [coordinates]
+	  };
+	};
 
+	function getNumberOfEdges(options) {
+	  if (isUndefinedOrNull(options)) {
+	    return 32;
+	  } else if (isObjectNotArray(options)) {
+	    var numberOfEdges = options.numberOfEdges;
+	    return numberOfEdges === undefined ? 32 : numberOfEdges;
+	  }
 
-	function parseLaneDirections(tags, isOneWay, laneCount) {
-	    var forward = parseInt(tags['lanes:forward'], 10);
-	    var backward = parseInt(tags['lanes:backward'], 10);
-	    var bothways = parseInt(tags['lanes:both_ways'], 10) > 0 ? 1 : 0;
+	  return options;
+	}
 
-	    if (parseInt(tags.oneway, 10) === -1) {
-	        forward = 0;
-	        bothways = 0;
-	        backward = laneCount;
-	    }
-	    else if (isOneWay) {
-	        forward = laneCount;
-	        bothways = 0;
-	        backward = 0;
-	    }
-	    else if (isNaN(forward) && isNaN(backward)) {
-	        backward = Math.floor((laneCount - bothways) / 2);
-	        forward = laneCount - bothways - backward;
-	    }
-	    else if (isNaN(forward)) {
-	        if (backward > laneCount - bothways) {
-	            backward = laneCount - bothways;
-	        }
-	        forward = laneCount - bothways - backward;
-	    }
-	    else if (isNaN(backward)) {
-	        if (forward > laneCount - bothways) {
-	            forward = laneCount - bothways;
-	        }
-	        backward = laneCount - bothways - forward;
-	    }
-	    return {
-	        forward: forward,
-	        backward: backward,
-	        bothways: bothways
-	    };
+	function getEarthRadius(options) {
+	  if (isUndefinedOrNull(options)) {
+	    return defaultEarthRadius;
+	  } else if (isObjectNotArray(options)) {
+	    var earthRadius = options.earthRadius;
+	    return earthRadius === undefined ? defaultEarthRadius : earthRadius;
+	  }
+
+	  return defaultEarthRadius;
 	}
 
+	function getDirection(options) {
+	  if (isObjectNotArray(options) && options.rightHandRule) {
+	    return -1;
+	  }
 
-	function parseTurnLanes(tag){
-	    if (!tag) { return; }
+	  return 1;
+	}
 
-	    var validValues = [
-	        'left', 'slight_left', 'sharp_left', 'through', 'right', 'slight_right',
-	        'sharp_right', 'reverse', 'merge_to_left', 'merge_to_right', 'none'
-	    ];
+	function getBearing(options) {
+	  if (isUndefinedOrNull(options)) {
+	    return 0;
+	  } else if (isObjectNotArray(options)) {
+	    var bearing = options.bearing;
+	    return bearing === undefined ? 0 : bearing;
+	  }
 
-	    return tag.split('|')
-	        .map(function (s) {
-	            if (s === '') { s = 'none'; }
-	            return s.split(';')
-	                .map(function (d) {
-	                    return validValues.indexOf(d) === -1 ? 'unknown': d;
-	                });
-	        });
+	  return 0;
 	}
 
+	function isObjectNotArray(argument) {
+	  return argument !== null && _typeof(argument) === "object" && !Array.isArray(argument);
+	}
 
-	function parseMaxspeedLanes(tag, maxspeed) {
-	    if (!tag) { return; }
-
-	    return tag.split('|')
-	        .map(function (s) {
-	            if (s === 'none') { return s; }
-	            var m = parseInt(s, 10);
-	            if (s === '' || m === maxspeed) { return null; }
-	            return isNaN(m) ? 'unknown': m;
-	        });
+	function isUndefinedOrNull(argument) {
+	  return argument === null || argument === undefined;
 	}
 
+	var $$m = _export;
 
-	function parseMiscLanes(tag) {
-	    if (!tag) { return; }
+	// `Number.EPSILON` constant
+	// https://tc39.es/ecma262/#sec-number.epsilon
+	$$m({ target: 'Number', stat: true }, {
+	  EPSILON: Math.pow(2, -52)
+	});
 
-	    var validValues = [
-	        'yes', 'no', 'designated'
-	    ];
+	var uncurryThis$8 = functionUncurryThis;
+	var requireObjectCoercible$4 = requireObjectCoercible$e;
+	var toString$5 = toString$k;
 
-	    return tag.split('|')
-	        .map(function (s) {
-	            if (s === '') { s = 'no'; }
-	            return validValues.indexOf(s) === -1 ? 'unknown': s;
-	        });
-	}
+	var quot = /"/g;
+	var replace$2 = uncurryThis$8(''.replace);
 
+	// `CreateHTML` abstract operation
+	// https://tc39.es/ecma262/#sec-createhtml
+	var createHtml = function (string, tag, attribute, value) {
+	  var S = toString$5(requireObjectCoercible$4(string));
+	  var p1 = '<' + tag;
+	  if (attribute !== '') p1 += ' ' + attribute + '="' + replace$2(toString$5(value), quot, '&quot;') + '"';
+	  return p1 + '>' + S + '</' + tag + '>';
+	};
 
-	function parseBicycleWay(tag) {
-	    if (!tag) { return; }
+	var fails$6 = fails$V;
 
-	    var validValues = [
-	        'yes', 'no', 'designated', 'lane'
-	    ];
+	// check the existence of a method, lowercase
+	// of a tag and escaping quotes in arguments
+	var stringHtmlForced = function (METHOD_NAME) {
+	  return fails$6(function () {
+	    var test = ''[METHOD_NAME]('"');
+	    return test !== test.toLowerCase() || test.split('"').length > 3;
+	  });
+	};
 
-	    return tag.split('|')
-	        .map(function (s) {
-	            if (s === '') { s = 'no'; }
-	            return validValues.indexOf(s) === -1 ? 'unknown': s;
-	        });
-	}
+	var $$l = _export;
+	var createHTML = createHtml;
+	var forcedStringHTMLMethod = stringHtmlForced;
 
+	// `String.prototype.link` method
+	// https://tc39.es/ecma262/#sec-string.prototype.link
+	$$l({ target: 'String', proto: true, forced: forcedStringHTMLMethod('link') }, {
+	  link: function link(url) {
+	    return createHTML(this, 'a', 'href', url);
+	  }
+	});
 
-	function mapToLanesObj(lanesObj, data, key) {
-	    if (data.forward) { data.forward.forEach(function(l, i) {
-	        if (!lanesObj.forward[i]) { lanesObj.forward[i] = {}; }
-	        lanesObj.forward[i][key] = l;
-	    }); }
-	    if (data.backward) { data.backward.forEach(function(l, i) {
-	        if (!lanesObj.backward[i]) { lanesObj.backward[i] = {}; }
-	        lanesObj.backward[i][key] = l;
-	    }); }
-	    if (data.unspecified) { data.unspecified.forEach(function(l, i) {
-	        if (!lanesObj.unspecified[i]) { lanesObj.unspecified[i] = {}; }
-	        lanesObj.unspecified[i][key] = l;
-	    }); }
-	}
+	/**
+	 * splaytree v3.1.0
+	 * Fast Splay tree for Node and browser
+	 *
+	 * @author Alexander Milevski <info@w8r.name>
+	 * @license MIT
+	 * @preserve
+	 */
+	var Node =
+	/** @class */
+	function () {
+	  function Node(key, data) {
+	    this.next = null;
+	    this.key = key;
+	    this.data = data;
+	    this.left = null;
+	    this.right = null;
+	  }
 
-	function osmWay() {
-	    if (!(this instanceof osmWay)) {
-	        return (new osmWay()).initialize(arguments);
-	    } else if (arguments.length) {
-	        this.initialize(arguments);
-	    }
-	}
+	  return Node;
+	}();
+	/* follows "An implementation of top-down splaying"
+	 * by D. Sleator <sleator@cs.cmu.edu> March 1992
+	 */
 
 
-	osmEntity.way = osmWay;
+	function DEFAULT_COMPARE(a, b) {
+	  return a > b ? 1 : a < b ? -1 : 0;
+	}
+	/**
+	 * Simple top down splay, not requiring i to be in the tree t.
+	 */
 
-	osmWay.prototype = Object.create(osmEntity.prototype);
 
+	function splay(i, t, comparator) {
+	  var N = new Node(null, null);
+	  var l = N;
+	  var r = N;
 
-	Object.assign(osmWay.prototype, {
-	    type: 'way',
-	    nodes: [],
+	  while (true) {
+	    var cmp = comparator(i, t.key); //if (i < t.key) {
 
+	    if (cmp < 0) {
+	      if (t.left === null) break; //if (i < t.left.key) {
 
-	    copy: function(resolver, copies) {
-	        if (copies[this.id]) { return copies[this.id]; }
+	      if (comparator(i, t.left.key) < 0) {
+	        var y = t.left;
+	        /* rotate right */
 
-	        var copy = osmEntity.prototype.copy.call(this, resolver, copies);
+	        t.left = y.right;
+	        y.right = t;
+	        t = y;
+	        if (t.left === null) break;
+	      }
 
-	        var nodes = this.nodes.map(function(id) {
-	            return resolver.entity(id).copy(resolver, copies).id;
-	        });
+	      r.left = t;
+	      /* link right */
 
-	        copy = copy.update({ nodes: nodes });
-	        copies[this.id] = copy;
+	      r = t;
+	      t = t.left; //} else if (i > t.key) {
+	    } else if (cmp > 0) {
+	      if (t.right === null) break; //if (i > t.right.key) {
 
-	        return copy;
-	    },
+	      if (comparator(i, t.right.key) > 0) {
+	        var y = t.right;
+	        /* rotate left */
 
+	        t.right = y.left;
+	        y.left = t;
+	        t = y;
+	        if (t.right === null) break;
+	      }
 
-	    extent: function(resolver) {
-	        return resolver.transient(this, 'extent', function() {
-	            var extent = geoExtent();
-	            for (var i = 0; i < this.nodes.length; i++) {
-	                var node = resolver.hasEntity(this.nodes[i]);
-	                if (node) {
-	                    extent._extend(node.extent());
-	                }
-	            }
-	            return extent;
-	        });
-	    },
+	      l.right = t;
+	      /* link left */
 
+	      l = t;
+	      t = t.right;
+	    } else break;
+	  }
+	  /* assemble */
 
-	    first: function() {
-	        return this.nodes[0];
-	    },
 
+	  l.right = t.left;
+	  r.left = t.right;
+	  t.left = N.right;
+	  t.right = N.left;
+	  return t;
+	}
 
-	    last: function() {
-	        return this.nodes[this.nodes.length - 1];
-	    },
+	function insert(i, data, t, comparator) {
+	  var node = new Node(i, data);
 
+	  if (t === null) {
+	    node.left = node.right = null;
+	    return node;
+	  }
 
-	    contains: function(node) {
-	        return this.nodes.indexOf(node) >= 0;
-	    },
+	  t = splay(i, t, comparator);
+	  var cmp = comparator(i, t.key);
 
+	  if (cmp < 0) {
+	    node.left = t.left;
+	    node.right = t;
+	    t.left = null;
+	  } else if (cmp >= 0) {
+	    node.right = t.right;
+	    node.left = t;
+	    t.right = null;
+	  }
 
-	    affix: function(node) {
-	        if (this.nodes[0] === node) { return 'prefix'; }
-	        if (this.nodes[this.nodes.length - 1] === node) { return 'suffix'; }
-	    },
+	  return node;
+	}
 
+	function split$2(key, v, comparator) {
+	  var left = null;
+	  var right = null;
 
-	    layer: function() {
-	        // explicit layer tag, clamp between -10, 10..
-	        if (isFinite(this.tags.layer)) {
-	            return Math.max(-10, Math.min(+(this.tags.layer), 10));
-	        }
+	  if (v) {
+	    v = splay(key, v, comparator);
+	    var cmp = comparator(v.key, key);
 
-	        // implied layer tag..
-	        if (this.tags.covered === 'yes') { return -1; }
-	        if (this.tags.location === 'overground') { return 1; }
-	        if (this.tags.location === 'underground') { return -1; }
-	        if (this.tags.location === 'underwater') { return -10; }
+	    if (cmp === 0) {
+	      left = v.left;
+	      right = v.right;
+	    } else if (cmp < 0) {
+	      right = v.right;
+	      v.right = null;
+	      left = v;
+	    } else {
+	      left = v.left;
+	      v.left = null;
+	      right = v;
+	    }
+	  }
 
-	        if (this.tags.power === 'line') { return 10; }
-	        if (this.tags.power === 'minor_line') { return 10; }
-	        if (this.tags.aerialway) { return 10; }
-	        if (this.tags.bridge) { return 1; }
-	        if (this.tags.cutting) { return -1; }
-	        if (this.tags.tunnel) { return -1; }
-	        if (this.tags.waterway) { return -1; }
-	        if (this.tags.man_made === 'pipeline') { return -10; }
-	        if (this.tags.boundary) { return -10; }
-	        return 0;
-	    },
+	  return {
+	    left: left,
+	    right: right
+	  };
+	}
 
+	function merge$3(left, right, comparator) {
+	  if (right === null) return left;
+	  if (left === null) return right;
+	  right = splay(left.key, right, comparator);
+	  right.left = left;
+	  return right;
+	}
+	/**
+	 * Prints level of the tree
+	 */
 
-	    // the approximate width of the line based on its tags except its `width` tag
-	    impliedLineWidthMeters: function() {
-	        var averageWidths = {
-	            highway: { // width is for single lane
-	                motorway: 5, motorway_link: 5, trunk: 4.5, trunk_link: 4.5,
-	                primary: 4, secondary: 4, tertiary: 4,
-	                primary_link: 4, secondary_link: 4, tertiary_link: 4,
-	                unclassified: 4, road: 4, living_street: 4, bus_guideway: 4, pedestrian: 4,
-	                residential: 3.5, service: 3.5, track: 3, cycleway: 2.5,
-	                bridleway: 2, corridor: 2, steps: 2, path: 1.5, footway: 1.5
-	            },
-	            railway: { // width includes ties and rail bed, not just track gauge
-	                rail: 2.5, light_rail: 2.5, tram: 2.5, subway: 2.5,
-	                monorail: 2.5, funicular: 2.5, disused: 2.5, preserved: 2.5,
-	                miniature: 1.5, narrow_gauge: 1.5
-	            },
-	            waterway: {
-	                river: 50, canal: 25, stream: 5, tidal_channel: 5, fish_pass: 2.5, drain: 2.5, ditch: 1.5
-	            }
-	        };
-	        for (var key in averageWidths) {
-	            if (this.tags[key] && averageWidths[key][this.tags[key]]) {
-	                var width = averageWidths[key][this.tags[key]];
-	                if (key === 'highway') {
-	                    var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
-	                    if (!laneCount) { laneCount = this.isOneWay() ? 1 : 2; }
-
-	                    return width * laneCount;
-	                }
-	                return width;
-	            }
-	        }
-	        return null;
-	    },
 
+	function printRow(root, prefix, isTail, out, printNode) {
+	  if (root) {
+	    out("" + prefix + (isTail ? '└── ' : '├── ') + printNode(root) + "\n");
+	    var indent = prefix + (isTail ? '    ' : '│   ');
+	    if (root.left) printRow(root.left, indent, false, out, printNode);
+	    if (root.right) printRow(root.right, indent, true, out, printNode);
+	  }
+	}
+
+	var Tree =
+	/** @class */
+	function () {
+	  function Tree(comparator) {
+	    if (comparator === void 0) {
+	      comparator = DEFAULT_COMPARE;
+	    }
 
-	    isOneWay: function() {
-	        // explicit oneway tag..
-	        var values = {
-	            'yes': true,
-	            '1': true,
-	            '-1': true,
-	            'reversible': true,
-	            'alternating': true,
-	            'no': false,
-	            '0': false
-	        };
-	        if (values[this.tags.oneway] !== undefined) {
-	            return values[this.tags.oneway];
-	        }
+	    this._root = null;
+	    this._size = 0;
+	    this._comparator = comparator;
+	  }
+	  /**
+	   * Inserts a key, allows duplicates
+	   */
 
-	        // implied oneway tag..
-	        for (var key in this.tags) {
-	            if (key in osmOneWayTags && (this.tags[key] in osmOneWayTags[key]))
-	                { return true; }
-	        }
-	        return false;
-	    },
 
-	    // Some identifier for tag that implies that this way is "sided",
-	    // i.e. the right side is the 'inside' (e.g. the right side of a
-	    // natural=cliff is lower).
-	    sidednessIdentifier: function() {
-	        for (var key in this.tags) {
-	            var value = this.tags[key];
-	            if (key in osmRightSideIsInsideTags && (value in osmRightSideIsInsideTags[key])) {
-	                if (osmRightSideIsInsideTags[key][value] === true) {
-	                    return key;
-	                } else {
-	                    // if the map's value is something other than a
-	                    // literal true, we should use it so we can
-	                    // special case some keys (e.g. natural=coastline
-	                    // is handled differently to other naturals).
-	                    return osmRightSideIsInsideTags[key][value];
-	                }
-	            }
-	        }
+	  Tree.prototype.insert = function (key, data) {
+	    this._size++;
+	    return this._root = insert(key, data, this._root, this._comparator);
+	  };
+	  /**
+	   * Adds a key, if it is not present in the tree
+	   */
 
-	        return null;
-	    },
 
-	    isSided: function() {
-	        if (this.tags.two_sided === 'yes') {
-	            return false;
-	        }
+	  Tree.prototype.add = function (key, data) {
+	    var node = new Node(key, data);
 
-	        return this.sidednessIdentifier() !== null;
-	    },
+	    if (this._root === null) {
+	      node.left = node.right = null;
+	      this._size++;
+	      this._root = node;
+	    }
 
-	    lanes: function() {
-	        return osmLanes(this);
-	    },
+	    var comparator = this._comparator;
+	    var t = splay(key, this._root, comparator);
+	    var cmp = comparator(key, t.key);
+	    if (cmp === 0) this._root = t;else {
+	      if (cmp < 0) {
+	        node.left = t.left;
+	        node.right = t;
+	        t.left = null;
+	      } else if (cmp > 0) {
+	        node.right = t.right;
+	        node.left = t;
+	        t.right = null;
+	      }
 
+	      this._size++;
+	      this._root = node;
+	    }
+	    return this._root;
+	  };
+	  /**
+	   * @param  {Key} key
+	   * @return {Node|null}
+	   */
 
-	    isClosed: function() {
-	        return this.nodes.length > 1 && this.first() === this.last();
-	    },
 
+	  Tree.prototype.remove = function (key) {
+	    this._root = this._remove(key, this._root, this._comparator);
+	  };
+	  /**
+	   * Deletes i from the tree if it's there
+	   */
 
-	    isConvex: function(resolver) {
-	        if (!this.isClosed() || this.isDegenerate()) { return null; }
 
-	        var nodes = utilArrayUniq(resolver.childNodes(this));
-	        var coords = nodes.map(function(n) { return n.loc; });
-	        var curr = 0;
-	        var prev = 0;
+	  Tree.prototype._remove = function (i, t, comparator) {
+	    var x;
+	    if (t === null) return null;
+	    t = splay(i, t, comparator);
+	    var cmp = comparator(i, t.key);
 
-	        for (var i = 0; i < coords.length; i++) {
-	            var o = coords[(i+1) % coords.length];
-	            var a = coords[i];
-	            var b = coords[(i+2) % coords.length];
-	            var res = geoVecCross(a, b, o);
+	    if (cmp === 0) {
+	      /* found it */
+	      if (t.left === null) {
+	        x = t.right;
+	      } else {
+	        x = splay(i, t.left, comparator);
+	        x.right = t.right;
+	      }
 
-	            curr = (res > 0) ? 1 : (res < 0) ? -1 : 0;
-	            if (curr === 0) {
-	                continue;
-	            } else if (prev && curr !== prev) {
-	                return false;
-	            }
-	            prev = curr;
-	        }
-	        return true;
-	    },
+	      this._size--;
+	      return x;
+	    }
 
-	    // returns an object with the tag that implies this is an area, if any
-	    tagSuggestingArea: function() {
-	        return osmTagSuggestingArea(this.tags);
-	    },
+	    return t;
+	    /* It wasn't there */
+	  };
+	  /**
+	   * Removes and returns the node with smallest key
+	   */
 
-	    isArea: function() {
-	        if (this.tags.area === 'yes')
-	            { return true; }
-	        if (!this.isClosed() || this.tags.area === 'no')
-	            { return false; }
-	        return this.tagSuggestingArea() !== null;
-	    },
 
+	  Tree.prototype.pop = function () {
+	    var node = this._root;
 
-	    isDegenerate: function() {
-	        return (new Set(this.nodes).size < (this.isArea() ? 3 : 2));
-	    },
+	    if (node) {
+	      while (node.left) {
+	        node = node.left;
+	      }
 
+	      this._root = splay(node.key, this._root, this._comparator);
+	      this._root = this._remove(node.key, this._root, this._comparator);
+	      return {
+	        key: node.key,
+	        data: node.data
+	      };
+	    }
 
-	    areAdjacent: function(n1, n2) {
-	        for (var i = 0; i < this.nodes.length; i++) {
-	            if (this.nodes[i] === n1) {
-	                if (this.nodes[i - 1] === n2) { return true; }
-	                if (this.nodes[i + 1] === n2) { return true; }
-	            }
-	        }
-	        return false;
-	    },
+	    return null;
+	  };
+	  /**
+	   * Find without splaying
+	   */
 
 
-	    geometry: function(graph) {
-	        return graph.transient(this, 'geometry', function() {
-	            return this.isArea() ? 'area' : 'line';
-	        });
-	    },
+	  Tree.prototype.findStatic = function (key) {
+	    var current = this._root;
+	    var compare = this._comparator;
 
+	    while (current) {
+	      var cmp = compare(key, current.key);
+	      if (cmp === 0) return current;else if (cmp < 0) current = current.left;else current = current.right;
+	    }
 
-	    // returns an array of objects representing the segments between the nodes in this way
-	    segments: function(graph) {
-
-	        function segmentExtent(graph) {
-	            var n1 = graph.hasEntity(this.nodes[0]);
-	            var n2 = graph.hasEntity(this.nodes[1]);
-	            return n1 && n2 && geoExtent([
-	                [
-	                    Math.min(n1.loc[0], n2.loc[0]),
-	                    Math.min(n1.loc[1], n2.loc[1])
-	                ],
-	                [
-	                    Math.max(n1.loc[0], n2.loc[0]),
-	                    Math.max(n1.loc[1], n2.loc[1])
-	                ]
-	            ]);
-	        }
-
-	        return graph.transient(this, 'segments', function() {
-	            var segments = [];
-	            for (var i = 0; i < this.nodes.length - 1; i++) {
-	                segments.push({
-	                    id: this.id + '-' + i,
-	                    wayId: this.id,
-	                    index: i,
-	                    nodes: [this.nodes[i], this.nodes[i + 1]],
-	                    extent: segmentExtent
-	                });
-	            }
-	            return segments;
-	        });
-	    },
+	    return null;
+	  };
 
+	  Tree.prototype.find = function (key) {
+	    if (this._root) {
+	      this._root = splay(key, this._root, this._comparator);
+	      if (this._comparator(key, this._root.key) !== 0) return null;
+	    }
 
-	    // If this way is not closed, append the beginning node to the end of the nodelist to close it.
-	    close: function() {
-	        if (this.isClosed() || !this.nodes.length) { return this; }
+	    return this._root;
+	  };
 
-	        var nodes = this.nodes.slice();
-	        nodes = nodes.filter(noRepeatNodes);
-	        nodes.push(nodes[0]);
-	        return this.update({ nodes: nodes });
-	    },
+	  Tree.prototype.contains = function (key) {
+	    var current = this._root;
+	    var compare = this._comparator;
 
+	    while (current) {
+	      var cmp = compare(key, current.key);
+	      if (cmp === 0) return true;else if (cmp < 0) current = current.left;else current = current.right;
+	    }
 
-	    // If this way is closed, remove any connector nodes from the end of the nodelist to unclose it.
-	    unclose: function() {
-	        if (!this.isClosed()) { return this; }
+	    return false;
+	  };
 
-	        var nodes = this.nodes.slice();
-	        var connector = this.first();
-	        var i = nodes.length - 1;
+	  Tree.prototype.forEach = function (visitor, ctx) {
+	    var current = this._root;
+	    var Q = [];
+	    /* Initialize stack s */
 
-	        // remove trailing connectors..
-	        while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-	            nodes.splice(i, 1);
-	            i = nodes.length - 1;
-	        }
+	    var done = false;
 
-	        nodes = nodes.filter(noRepeatNodes);
-	        return this.update({ nodes: nodes });
-	    },
+	    while (!done) {
+	      if (current !== null) {
+	        Q.push(current);
+	        current = current.left;
+	      } else {
+	        if (Q.length !== 0) {
+	          current = Q.pop();
+	          visitor.call(ctx, current);
+	          current = current.right;
+	        } else done = true;
+	      }
+	    }
+
+	    return this;
+	  };
+	  /**
+	   * Walk key range from `low` to `high`. Stops if `fn` returns a value.
+	   */
 
 
-	    // Adds a node (id) in front of the node which is currently at position index.
-	    // If index is undefined, the node will be added to the end of the way for linear ways,
-	    //   or just before the final connecting node for circular ways.
-	    // Consecutive duplicates are eliminated including existing ones.
-	    // Circularity is always preserved when adding a node.
-	    addNode: function(id, index) {
-	        var nodes = this.nodes.slice();
-	        var isClosed = this.isClosed();
-	        var max = isClosed ? nodes.length - 1 : nodes.length;
+	  Tree.prototype.range = function (low, high, fn, ctx) {
+	    var Q = [];
+	    var compare = this._comparator;
+	    var node = this._root;
+	    var cmp;
 
-	        if (index === undefined) {
-	            index = max;
-	        }
+	    while (Q.length !== 0 || node) {
+	      if (node) {
+	        Q.push(node);
+	        node = node.left;
+	      } else {
+	        node = Q.pop();
+	        cmp = compare(node.key, high);
 
-	        if (index < 0 || index > max) {
-	            throw new RangeError('index ' + index + ' out of range 0..' + max);
+	        if (cmp > 0) {
+	          break;
+	        } else if (compare(node.key, low) >= 0) {
+	          if (fn.call(ctx, node)) return this; // stop if smth is returned
 	        }
 
-	        // If this is a closed way, remove all connector nodes except the first one
-	        // (there may be duplicates) and adjust index if necessary..
-	        if (isClosed) {
-	            var connector = this.first();
+	        node = node.right;
+	      }
+	    }
 
-	            // leading connectors..
-	            var i = 1;
-	            while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
-	                nodes.splice(i, 1);
-	                if (index > i) { index--; }
-	            }
+	    return this;
+	  };
+	  /**
+	   * Returns array of keys
+	   */
 
-	            // trailing connectors..
-	            i = nodes.length - 1;
-	            while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-	                nodes.splice(i, 1);
-	                if (index > i) { index--; }
-	                i = nodes.length - 1;
-	            }
-	        }
 
-	        nodes.splice(index, 0, id);
-	        nodes = nodes.filter(noRepeatNodes);
+	  Tree.prototype.keys = function () {
+	    var keys = [];
+	    this.forEach(function (_a) {
+	      var key = _a.key;
+	      return keys.push(key);
+	    });
+	    return keys;
+	  };
+	  /**
+	   * Returns array of all the data in the nodes
+	   */
 
-	        // If the way was closed before, append a connector node to keep it closed..
-	        if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-	            nodes.push(nodes[0]);
-	        }
 
-	        return this.update({ nodes: nodes });
-	    },
+	  Tree.prototype.values = function () {
+	    var values = [];
+	    this.forEach(function (_a) {
+	      var data = _a.data;
+	      return values.push(data);
+	    });
+	    return values;
+	  };
 
+	  Tree.prototype.min = function () {
+	    if (this._root) return this.minNode(this._root).key;
+	    return null;
+	  };
 
-	    // Replaces the node which is currently at position index with the given node (id).
-	    // Consecutive duplicates are eliminated including existing ones.
-	    // Circularity is preserved when updating a node.
-	    updateNode: function(id, index) {
-	        var nodes = this.nodes.slice();
-	        var isClosed = this.isClosed();
-	        var max = nodes.length - 1;
+	  Tree.prototype.max = function () {
+	    if (this._root) return this.maxNode(this._root).key;
+	    return null;
+	  };
 
-	        if (index === undefined || index < 0 || index > max) {
-	            throw new RangeError('index ' + index + ' out of range 0..' + max);
-	        }
+	  Tree.prototype.minNode = function (t) {
+	    if (t === void 0) {
+	      t = this._root;
+	    }
 
-	        // If this is a closed way, remove all connector nodes except the first one
-	        // (there may be duplicates) and adjust index if necessary..
-	        if (isClosed) {
-	            var connector = this.first();
+	    if (t) while (t.left) {
+	      t = t.left;
+	    }
+	    return t;
+	  };
 
-	            // leading connectors..
-	            var i = 1;
-	            while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
-	                nodes.splice(i, 1);
-	                if (index > i) { index--; }
-	            }
+	  Tree.prototype.maxNode = function (t) {
+	    if (t === void 0) {
+	      t = this._root;
+	    }
 
-	            // trailing connectors..
-	            i = nodes.length - 1;
-	            while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-	                nodes.splice(i, 1);
-	                if (index === i) { index = 0; }  // update leading connector instead
-	                i = nodes.length - 1;
-	            }
-	        }
+	    if (t) while (t.right) {
+	      t = t.right;
+	    }
+	    return t;
+	  };
+	  /**
+	   * Returns node at given index
+	   */
 
-	        nodes.splice(index, 1, id);
-	        nodes = nodes.filter(noRepeatNodes);
 
-	        // If the way was closed before, append a connector node to keep it closed..
-	        if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-	            nodes.push(nodes[0]);
-	        }
+	  Tree.prototype.at = function (index) {
+	    var current = this._root;
+	    var done = false;
+	    var i = 0;
+	    var Q = [];
 
-	        return this.update({nodes: nodes});
-	    },
+	    while (!done) {
+	      if (current) {
+	        Q.push(current);
+	        current = current.left;
+	      } else {
+	        if (Q.length > 0) {
+	          current = Q.pop();
+	          if (i === index) return current;
+	          i++;
+	          current = current.right;
+	        } else done = true;
+	      }
+	    }
 
+	    return null;
+	  };
 
-	    // Replaces each occurrence of node id needle with replacement.
-	    // Consecutive duplicates are eliminated including existing ones.
-	    // Circularity is preserved.
-	    replaceNode: function(needleID, replacementID) {
-	        var nodes = this.nodes.slice();
-	        var isClosed = this.isClosed();
+	  Tree.prototype.next = function (d) {
+	    var root = this._root;
+	    var successor = null;
 
-	        for (var i = 0; i < nodes.length; i++) {
-	            if (nodes[i] === needleID) {
-	                nodes[i] = replacementID;
-	            }
-	        }
+	    if (d.right) {
+	      successor = d.right;
 
-	        nodes = nodes.filter(noRepeatNodes);
+	      while (successor.left) {
+	        successor = successor.left;
+	      }
 
-	        // If the way was closed before, append a connector node to keep it closed..
-	        if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-	            nodes.push(nodes[0]);
-	        }
+	      return successor;
+	    }
 
-	        return this.update({nodes: nodes});
-	    },
+	    var comparator = this._comparator;
 
+	    while (root) {
+	      var cmp = comparator(d.key, root.key);
+	      if (cmp === 0) break;else if (cmp < 0) {
+	        successor = root;
+	        root = root.left;
+	      } else root = root.right;
+	    }
 
-	    // Removes each occurrence of node id.
-	    // Consecutive duplicates are eliminated including existing ones.
-	    // Circularity is preserved.
-	    removeNode: function(id) {
-	        var nodes = this.nodes.slice();
-	        var isClosed = this.isClosed();
+	    return successor;
+	  };
 
-	        nodes = nodes
-	            .filter(function(node) { return node !== id; })
-	            .filter(noRepeatNodes);
+	  Tree.prototype.prev = function (d) {
+	    var root = this._root;
+	    var predecessor = null;
 
-	        // If the way was closed before, append a connector node to keep it closed..
-	        if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-	            nodes.push(nodes[0]);
-	        }
+	    if (d.left !== null) {
+	      predecessor = d.left;
 
-	        return this.update({nodes: nodes});
-	    },
+	      while (predecessor.right) {
+	        predecessor = predecessor.right;
+	      }
 
+	      return predecessor;
+	    }
 
-	    asJXON: function(changeset_id) {
-	        var r = {
-	            way: {
-	                '@id': this.osmId(),
-	                '@version': this.version || 0,
-	                nd: this.nodes.map(function(id) {
-	                    return { keyAttributes: { ref: osmEntity.id.toOSM(id) } };
-	                }, this),
-	                tag: Object.keys(this.tags).map(function(k) {
-	                    return { keyAttributes: { k: k, v: this.tags[k] } };
-	                }, this)
-	            }
-	        };
-	        if (changeset_id) {
-	            r.way['@changeset'] = changeset_id;
-	        }
-	        return r;
-	    },
+	    var comparator = this._comparator;
 
+	    while (root) {
+	      var cmp = comparator(d.key, root.key);
+	      if (cmp === 0) break;else if (cmp < 0) root = root.left;else {
+	        predecessor = root;
+	        root = root.right;
+	      }
+	    }
 
-	    asGeoJSON: function(resolver) {
-	        return resolver.transient(this, 'GeoJSON', function() {
-	            var coordinates = resolver.childNodes(this)
-	                .map(function(n) { return n.loc; });
+	    return predecessor;
+	  };
 
-	            if (this.isArea() && this.isClosed()) {
-	                return {
-	                    type: 'Polygon',
-	                    coordinates: [coordinates]
-	                };
-	            } else {
-	                return {
-	                    type: 'LineString',
-	                    coordinates: coordinates
-	                };
-	            }
-	        });
-	    },
+	  Tree.prototype.clear = function () {
+	    this._root = null;
+	    this._size = 0;
+	    return this;
+	  };
 
+	  Tree.prototype.toList = function () {
+	    return toList(this._root);
+	  };
+	  /**
+	   * Bulk-load items. Both array have to be same size
+	   */
 
-	    area: function(resolver) {
-	        return resolver.transient(this, 'area', function() {
-	            var nodes = resolver.childNodes(this);
 
-	            var json = {
-	                type: 'Polygon',
-	                coordinates: [ nodes.map(function(n) { return n.loc; }) ]
-	            };
+	  Tree.prototype.load = function (keys, values, presort) {
+	    if (values === void 0) {
+	      values = [];
+	    }
 
-	            if (!this.isClosed() && nodes.length) {
-	                json.coordinates[0].push(nodes[0].loc);
-	            }
+	    if (presort === void 0) {
+	      presort = false;
+	    }
 
-	            var area = d3_geoArea(json);
+	    var size = keys.length;
+	    var comparator = this._comparator; // sort if needed
 
-	            // Heuristic for detecting counterclockwise winding order. Assumes
-	            // that OpenStreetMap polygons are not hemisphere-spanning.
-	            if (area > 2 * Math.PI) {
-	                json.coordinates[0] = json.coordinates[0].reverse();
-	                area = d3_geoArea(json);
-	            }
+	    if (presort) sort(keys, values, 0, size - 1, comparator);
 
-	            return isNaN(area) ? 0 : area;
-	        });
+	    if (this._root === null) {
+	      // empty tree
+	      this._root = loadRecursive(keys, values, 0, size);
+	      this._size = size;
+	    } else {
+	      // that re-builds the whole tree from two in-order traversals
+	      var mergedList = mergeLists(this.toList(), createList(keys, values), comparator);
+	      size = this._size + size;
+	      this._root = sortedListToBST({
+	        head: mergedList
+	      }, 0, size);
 	    }
-	});
 
+	    return this;
+	  };
 
-	// Filter function to eliminate consecutive duplicates.
-	function noRepeatNodes(node, i, arr) {
-	    return i === 0 || node !== arr[i - 1];
-	}
+	  Tree.prototype.isEmpty = function () {
+	    return this._root === null;
+	  };
 
-	// "Old" multipolyons, previously known as "simple" multipolygons, are as follows:
-	//
-	// 1. Relation tagged with `type=multipolygon` and no interesting tags.
-	// 2. One and only one member with the `outer` role. Must be a way with interesting tags.
-	// 3. No members without a role.
-	//
-	// Old multipolygons are no longer recommended but are still rendered as areas by iD.
+	  Object.defineProperty(Tree.prototype, "size", {
+	    get: function get() {
+	      return this._size;
+	    },
+	    enumerable: true,
+	    configurable: true
+	  });
+	  Object.defineProperty(Tree.prototype, "root", {
+	    get: function get() {
+	      return this._root;
+	    },
+	    enumerable: true,
+	    configurable: true
+	  });
 
-	function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
-	    if (entity.type !== 'relation' ||
-	        !entity.isMultipolygon()
-	        || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
-	        return false;
+	  Tree.prototype.toString = function (printNode) {
+	    if (printNode === void 0) {
+	      printNode = function printNode(n) {
+	        return String(n.key);
+	      };
 	    }
 
-	    var outerMember;
-	    for (var memberIndex in entity.members) {
-	        var member = entity.members[memberIndex];
-	        if (!member.role || member.role === 'outer') {
-	            if (outerMember) { return false; }
-	            if (member.type !== 'way') { return false; }
-	            if (!graph.hasEntity(member.id)) { return false; }
+	    var out = [];
+	    printRow(this._root, '', true, function (v) {
+	      return out.push(v);
+	    }, printNode);
+	    return out.join('');
+	  };
 
-	            outerMember = graph.entity(member.id);
+	  Tree.prototype.update = function (key, newKey, newData) {
+	    var comparator = this._comparator;
 
-	            if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
-	                return false;
-	            }
-	        }
+	    var _a = split$2(key, this._root, comparator),
+	        left = _a.left,
+	        right = _a.right;
+
+	    if (comparator(key, newKey) < 0) {
+	      right = insert(newKey, newData, right, comparator);
+	    } else {
+	      left = insert(newKey, newData, left, comparator);
 	    }
 
-	    return outerMember;
-	}
+	    this._root = merge$3(left, right, comparator);
+	  };
 
-	// For fixing up rendering of multipolygons with tags on the outer member.
-	// https://github.com/openstreetmap/iD/issues/613
-	function osmIsOldMultipolygonOuterMember(entity, graph) {
-	    if (entity.type !== 'way' || Object.keys(entity.tags).filter(osmIsInterestingTag).length === 0)
-	        { return false; }
+	  Tree.prototype.split = function (key) {
+	    return split$2(key, this._root, this._comparator);
+	  };
 
-	    var parents = graph.parentRelations(entity);
-	    if (parents.length !== 1)
-	        { return false; }
+	  return Tree;
+	}();
 
-	    var parent = parents[0];
-	    if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1)
-	        { return false; }
+	function loadRecursive(keys, values, start, end) {
+	  var size = end - start;
 
-	    var members = parent.members, member;
-	    for (var i = 0; i < members.length; i++) {
-	        member = members[i];
-	        if (member.id === entity.id && member.role && member.role !== 'outer')
-	            { return false; } // Not outer member
-	        if (member.id !== entity.id && (!member.role || member.role === 'outer'))
-	            { return false; } // Not a simple multipolygon
-	    }
+	  if (size > 0) {
+	    var middle = start + Math.floor(size / 2);
+	    var key = keys[middle];
+	    var data = values[middle];
+	    var node = new Node(key, data);
+	    node.left = loadRecursive(keys, values, start, middle);
+	    node.right = loadRecursive(keys, values, middle + 1, end);
+	    return node;
+	  }
 
-	    return parent;
+	  return null;
 	}
 
+	function createList(keys, values) {
+	  var head = new Node(null, null);
+	  var p = head;
 
-	function osmOldMultipolygonOuterMember(entity, graph) {
-	    if (entity.type !== 'way')
-	        { return false; }
+	  for (var i = 0; i < keys.length; i++) {
+	    p = p.next = new Node(keys[i], values[i]);
+	  }
 
-	    var parents = graph.parentRelations(entity);
-	    if (parents.length !== 1)
-	        { return false; }
+	  p.next = null;
+	  return head.next;
+	}
 
-	    var parent = parents[0];
-	    if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1)
-	        { return false; }
+	function toList(root) {
+	  var current = root;
+	  var Q = [];
+	  var done = false;
+	  var head = new Node(null, null);
+	  var p = head;
 
-	    var members = parent.members, member, outerMember;
-	    for (var i = 0; i < members.length; i++) {
-	        member = members[i];
-	        if (!member.role || member.role === 'outer') {
-	            if (outerMember)
-	                { return false; } // Not a simple multipolygon
-	            outerMember = member;
-	        }
+	  while (!done) {
+	    if (current) {
+	      Q.push(current);
+	      current = current.left;
+	    } else {
+	      if (Q.length > 0) {
+	        current = p = p.next = Q.pop();
+	        current = current.right;
+	      } else done = true;
 	    }
+	  }
 
-	    if (!outerMember)
-	        { return false; }
-
-	    var outerEntity = graph.hasEntity(outerMember.id);
-	    if (!outerEntity || !Object.keys(outerEntity.tags).filter(osmIsInterestingTag).length)
-	        { return false; }
+	  p.next = null; // that'll work even if the tree was empty
 
-	    return outerEntity;
+	  return head.next;
 	}
 
+	function sortedListToBST(list, start, end) {
+	  var size = end - start;
 
-	// Join `toJoin` array into sequences of connecting ways.
+	  if (size > 0) {
+	    var middle = start + Math.floor(size / 2);
+	    var left = sortedListToBST(list, start, middle);
+	    var root = list.head;
+	    root.left = left;
+	    list.head = list.head.next;
+	    root.right = sortedListToBST(list, middle + 1, end);
+	    return root;
+	  }
 
-	// Segments which share identical start/end nodes will, as much as possible,
-	// be connected with each other.
-	//
-	// The return value is a nested array. Each constituent array contains elements
-	// of `toJoin` which have been determined to connect.
-	//
-	// Each consitituent array also has a `nodes` property whose value is an
-	// ordered array of member nodes, with appropriate order reversal and
-	// start/end coordinate de-duplication.
-	//
-	// Members of `toJoin` must have, at minimum, `type` and `id` properties.
-	// Thus either an array of `osmWay`s or a relation member array may be used.
-	//
-	// If an member is an `osmWay`, its tags and childnodes may be reversed via
-	// `actionReverse` in the output.
-	//
-	// The returned sequences array also has an `actions` array property, containing
-	// any reversal actions that should be applied to the graph, should the calling
-	// code attempt to actually join the given ways.
-	//
-	// Incomplete members (those for which `graph.hasEntity(element.id)` returns
-	// false) and non-way members are ignored.
-	//
-	function osmJoinWays(toJoin, graph) {
-	    function resolve(member) {
-	        return graph.childNodes(graph.entity(member.id));
-	    }
+	  return null;
+	}
 
-	    function reverse(item) {
-	        var action = actionReverse(item.id, { reverseOneway: true });
-	        sequences.actions.push(action);
-	        return (item instanceof osmWay) ? action(graph).entity(item.id) : item;
-	    }
+	function mergeLists(l1, l2, compare) {
+	  var head = new Node(null, null); // dummy
 
-	    // make a copy containing only the items to join
-	    toJoin = toJoin.filter(function(member) {
-	        return member.type === 'way' && graph.hasEntity(member.id);
-	    });
+	  var p = head;
+	  var p1 = l1;
+	  var p2 = l2;
 
-	    // Are the things we are joining relation members or `osmWays`?
-	    // If `osmWays`, skip the "prefer a forward path" code below (see #4872)
-	    var i;
-	    var joinAsMembers = true;
-	    for (i = 0; i < toJoin.length; i++) {
-	        if (toJoin[i] instanceof osmWay) {
-	            joinAsMembers = false;
-	            break;
-	        }
+	  while (p1 !== null && p2 !== null) {
+	    if (compare(p1.key, p2.key) < 0) {
+	      p.next = p1;
+	      p1 = p1.next;
+	    } else {
+	      p.next = p2;
+	      p2 = p2.next;
 	    }
 
-	    var sequences = [];
-	    sequences.actions = [];
+	    p = p.next;
+	  }
 
-	    while (toJoin.length) {
-	        // start a new sequence
-	        var item = toJoin.shift();
-	        var currWays = [item];
-	        var currNodes = resolve(item).slice();
-	        var doneSequence = false;
-
-	        // add to it
-	        while (toJoin.length && !doneSequence) {
-	            var start = currNodes[0];
-	            var end = currNodes[currNodes.length - 1];
-	            var fn = null;
-	            var nodes = null;
-
-	            // Find the next way/member to join.
-	            for (i = 0; i < toJoin.length; i++) {
-	                item = toJoin[i];
-	                nodes = resolve(item);
-
-	                // (for member ordering only, not way ordering - see #4872)
-	                // Strongly prefer to generate a forward path that preserves the order
-	                // of the members array. For multipolygons and most relations, member
-	                // order does not matter - but for routes, it does. (see #4589)
-	                // If we started this sequence backwards (i.e. next member way attaches to
-	                // the start node and not the end node), reverse the initial way before continuing.
-	                if (joinAsMembers && currWays.length === 1 && nodes[0] !== end && nodes[nodes.length - 1] !== end &&
-	                    (nodes[nodes.length - 1] === start || nodes[0] === start)
-	                ) {
-	                    currWays[0] = reverse(currWays[0]);
-	                    currNodes.reverse();
-	                    start = currNodes[0];
-	                    end = currNodes[currNodes.length - 1];
-	                }
+	  if (p1 !== null) {
+	    p.next = p1;
+	  } else if (p2 !== null) {
+	    p.next = p2;
+	  }
 
-	                if (nodes[0] === end) {
-	                    fn = currNodes.push;               // join to end
-	                    nodes = nodes.slice(1);
-	                    break;
-	                } else if (nodes[nodes.length - 1] === end) {
-	                    fn = currNodes.push;               // join to end
-	                    nodes = nodes.slice(0, -1).reverse();
-	                    item = reverse(item);
-	                    break;
-	                } else if (nodes[nodes.length - 1] === start) {
-	                    fn = currNodes.unshift;            // join to beginning
-	                    nodes = nodes.slice(0, -1);
-	                    break;
-	                } else if (nodes[0] === start) {
-	                    fn = currNodes.unshift;            // join to beginning
-	                    nodes = nodes.slice(1).reverse();
-	                    item = reverse(item);
-	                    break;
-	                } else {
-	                    fn = nodes = null;
-	                }
-	            }
+	  return head.next;
+	}
 
-	            if (!nodes) {     // couldn't find a joinable way/member
-	                doneSequence = true;
-	                break;
-	            }
+	function sort(keys, values, left, right, compare) {
+	  if (left >= right) return;
+	  var pivot = keys[left + right >> 1];
+	  var i = left - 1;
+	  var j = right + 1;
 
-	            fn.apply(currWays, [item]);
-	            fn.apply(currNodes, nodes);
+	  while (true) {
+	    do {
+	      i++;
+	    } while (compare(keys[i], pivot) < 0);
 
-	            toJoin.splice(i, 1);
-	        }
+	    do {
+	      j--;
+	    } while (compare(keys[j], pivot) > 0);
 
-	        currWays.nodes = currNodes;
-	        sequences.push(currWays);
-	    }
+	    if (i >= j) break;
+	    var tmp = keys[i];
+	    keys[i] = keys[j];
+	    keys[j] = tmp;
+	    tmp = values[i];
+	    values[i] = values[j];
+	    values[j] = tmp;
+	  }
 
-	    return sequences;
+	  sort(keys, values, left, j, compare);
+	  sort(keys, values, j + 1, right, compare);
 	}
 
-	function actionAddMember(relationId, member, memberIndex, insertPair) {
+	function _classCallCheck(instance, Constructor) {
+	  if (!(instance instanceof Constructor)) {
+	    throw new TypeError("Cannot call a class as a function");
+	  }
+	}
 
-	    return function action(graph) {
-	        var relation = graph.entity(relationId);
+	function _defineProperties(target, props) {
+	  for (var i = 0; i < props.length; i++) {
+	    var descriptor = props[i];
+	    descriptor.enumerable = descriptor.enumerable || false;
+	    descriptor.configurable = true;
+	    if ("value" in descriptor) descriptor.writable = true;
+	    Object.defineProperty(target, descriptor.key, descriptor);
+	  }
+	}
 
-	        // There are some special rules for Public Transport v2 routes.
-	        var isPTv2 = /stop|platform/.test(member.role);
+	function _createClass(Constructor, protoProps, staticProps) {
+	  if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+	  if (staticProps) _defineProperties(Constructor, staticProps);
+	  return Constructor;
+	}
+	/**
+	 * A bounding box has the format:
+	 *
+	 *  { ll: { x: xmin, y: ymin }, ur: { x: xmax, y: ymax } }
+	 *
+	 */
 
-	        if ((isNaN(memberIndex) || insertPair) && member.type === 'way' && !isPTv2) {
-	            // Try to perform sensible inserts based on how the ways join together
-	            graph = addWayMember(relation, graph);
-	        } else {
-	            // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
-	            // Stops and Platforms for PTv2 should be ordered first.
-	            // hack: We do not currently have the ability to place them in the exactly correct order.
-	            if (isPTv2 && isNaN(memberIndex)) {
-	                memberIndex = 0;
-	            }
 
-	            graph = graph.replace(relation.addMember(member, memberIndex));
-	        }
+	var isInBbox = function isInBbox(bbox, point) {
+	  return bbox.ll.x <= point.x && point.x <= bbox.ur.x && bbox.ll.y <= point.y && point.y <= bbox.ur.y;
+	};
+	/* Returns either null, or a bbox (aka an ordered pair of points)
+	 * If there is only one point of overlap, a bbox with identical points
+	 * will be returned */
 
-	        return graph;
-	    };
 
+	var getBboxOverlap = function getBboxOverlap(b1, b2) {
+	  // check if the bboxes overlap at all
+	  if (b2.ur.x < b1.ll.x || b1.ur.x < b2.ll.x || b2.ur.y < b1.ll.y || b1.ur.y < b2.ll.y) return null; // find the middle two X values
 
-	    // Add a way member into the relation "wherever it makes sense".
-	    // In this situation we were not supplied a memberIndex.
-	    function addWayMember(relation, graph) {
-	        var groups, tempWay, item, i, j, k;
+	  var lowerX = b1.ll.x < b2.ll.x ? b2.ll.x : b1.ll.x;
+	  var upperX = b1.ur.x < b2.ur.x ? b1.ur.x : b2.ur.x; // find the middle two Y values
 
-	        // remove PTv2 stops and platforms before doing anything.
-	        var PTv2members = [];
-	        var members = [];
-	        for (i = 0; i < relation.members.length; i++) {
-	            var m = relation.members[i];
-	            if (/stop|platform/.test(m.role)) {
-	                PTv2members.push(m);
-	            } else {
-	                members.push(m);
-	            }
-	        }
-	        relation = relation.update({ members: members });
-
-
-	        if (insertPair) {
-	            // We're adding a member that must stay paired with an existing member.
-	            // (This feature is used by `actionSplit`)
-	            //
-	            // This is tricky because the members may exist multiple times in the
-	            // member list, and with different A-B/B-A ordering and different roles.
-	            // (e.g. a bus route that loops out and back - #4589).
-	            //
-	            // Replace the existing member with a temporary way,
-	            // so that `osmJoinWays` can treat the pair like a single way.
-	            tempWay = osmWay({ id: 'wTemp', nodes: insertPair.nodes });
-	            graph = graph.replace(tempWay);
-	            var tempMember = { id: tempWay.id, type: 'way', role: member.role };
-	            var tempRelation = relation.replaceMember({id: insertPair.originalID}, tempMember, true);
-	            groups = utilArrayGroupBy(tempRelation.members, 'type');
-	            groups.way = groups.way || [];
+	  var lowerY = b1.ll.y < b2.ll.y ? b2.ll.y : b1.ll.y;
+	  var upperY = b1.ur.y < b2.ur.y ? b1.ur.y : b2.ur.y; // put those middle values together to get the overlap
 
-	        } else {
-	            // Add the member anywhere, one time. Just push and let `osmJoinWays` decide where to put it.
-	            groups = utilArrayGroupBy(relation.members, 'type');
-	            groups.way = groups.way || [];
-	            groups.way.push(member);
-	        }
-
-	        members = withIndex(groups.way);
-	        var joined = osmJoinWays(members, graph);
-
-	        // `joined` might not contain all of the way members,
-	        // But will contain only the completed (downloaded) members
-	        for (i = 0; i < joined.length; i++) {
-	            var segment = joined[i];
-	            var nodes = segment.nodes.slice();
-	            var startIndex = segment[0].index;
-
-	            // j = array index in `members` where this segment starts
-	            for (j = 0; j < members.length; j++) {
-	                if (members[j].index === startIndex) {
-	                    break;
-	                }
-	            }
+	  return {
+	    ll: {
+	      x: lowerX,
+	      y: lowerY
+	    },
+	    ur: {
+	      x: upperX,
+	      y: upperY
+	    }
+	  };
+	};
+	/* Javascript doesn't do integer math. Everything is
+	 * floating point with percision Number.EPSILON.
+	 *
+	 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/EPSILON
+	 */
 
-	            // k = each member in segment
-	            for (k = 0; k < segment.length; k++) {
-	                item = segment[k];
-	                var way = graph.entity(item.id);
-
-	                // If this is a paired item, generate members in correct order and role
-	                if (tempWay && item.id === tempWay.id) {
-	                    if (nodes[0].id === insertPair.nodes[0]) {
-	                        item.pair = [
-	                            { id: insertPair.originalID, type: 'way', role: item.role },
-	                            { id: insertPair.insertedID, type: 'way', role: item.role }
-	                        ];
-	                    } else {
-	                        item.pair = [
-	                            { id: insertPair.insertedID, type: 'way', role: item.role },
-	                            { id: insertPair.originalID, type: 'way', role: item.role }
-	                        ];
-	                    }
-	                }
 
-	                // reorder `members` if necessary
-	                if (k > 0) {
-	                    if (j+k >= members.length || item.index !== members[j+k].index) {
-	                        moveMember(members, item.index, j+k);
-	                    }
-	                }
+	var epsilon = Number.EPSILON; // IE Polyfill
 
-	                nodes.splice(0, way.nodes.length - 1);
-	            }
-	        }
+	if (epsilon === undefined) epsilon = Math.pow(2, -52);
+	var EPSILON_SQ = epsilon * epsilon;
+	/* FLP comparator */
 
-	        if (tempWay) {
-	            graph = graph.remove(tempWay);
-	        }
+	var cmp = function cmp(a, b) {
+	  // check if they're both 0
+	  if (-epsilon < a && a < epsilon) {
+	    if (-epsilon < b && b < epsilon) {
+	      return 0;
+	    }
+	  } // check if they're flp equal
 
-	        // Final pass: skip dead items, split pairs, remove index properties
-	        var wayMembers = [];
-	        for (i = 0; i < members.length; i++) {
-	            item = members[i];
-	            if (item.index === -1) { continue; }
 
-	            if (item.pair) {
-	                wayMembers.push(item.pair[0]);
-	                wayMembers.push(item.pair[1]);
-	            } else {
-	                wayMembers.push(utilObjectOmit(item, ['index']));
-	            }
-	        }
+	  var ab = a - b;
 
-	        // Put stops and platforms first, then nodes, ways, relations
-	        // This is recommended for Public Transport v2 routes:
-	        // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
-	        var newMembers = PTv2members.concat( (groups.node || []), wayMembers, (groups.relation || []) );
+	  if (ab * ab < EPSILON_SQ * a * b) {
+	    return 0;
+	  } // normal comparison
 
-	        return graph.replace(relation.update({ members: newMembers }));
 
+	  return a < b ? -1 : 1;
+	};
+	/**
+	 * This class rounds incoming values sufficiently so that
+	 * floating points problems are, for the most part, avoided.
+	 *
+	 * Incoming points are have their x & y values tested against
+	 * all previously seen x & y values. If either is 'too close'
+	 * to a previously seen value, it's value is 'snapped' to the
+	 * previously seen value.
+	 *
+	 * All points should be rounded by this class before being
+	 * stored in any data structures in the rest of this algorithm.
+	 */
 
-	        // `moveMember()` changes the `members` array in place by splicing
-	        // the item with `.index = findIndex` to where it belongs,
-	        // and marking the old position as "dead" with `.index = -1`
-	        //
-	        // j=5, k=0                jk
-	        // segment                 5 4 7 6
-	        // members       0 1 2 3 4 5 6 7 8 9        keep 5 in j+k
-	        //
-	        // j=5, k=1                j k
-	        // segment                 5 4 7 6
-	        // members       0 1 2 3 4 5 6 7 8 9        move 4 to j+k
-	        // members       0 1 2 3 x 5 4 6 7 8 9      moved
-	        //
-	        // j=5, k=2                j   k
-	        // segment                 5 4 7 6
-	        // members       0 1 2 3 x 5 4 6 7 8 9      move 7 to j+k
-	        // members       0 1 2 3 x 5 4 7 6 x 8 9    moved
-	        //
-	        // j=5, k=3                j     k
-	        // segment                 5 4 7 6
-	        // members       0 1 2 3 x 5 4 7 6 x 8 9    keep 6 in j+k
-	        //
-	        function moveMember(arr, findIndex, toIndex) {
-	            for (var i = 0; i < arr.length; i++) {
-	                if (arr[i].index === findIndex) {
-	                    break;
-	                }
-	            }
 
-	            var item = Object.assign({}, arr[i]);   // shallow copy
-	            arr[i].index = -1;   // mark as dead
-	            item.index = toIndex;
-	            arr.splice(toIndex, 0, item);
-	        }
+	var PtRounder = /*#__PURE__*/function () {
+	  function PtRounder() {
+	    _classCallCheck(this, PtRounder);
 
+	    this.reset();
+	  }
 
-	        // This is the same as `Relation.indexedMembers`,
-	        // Except we don't want to index all the members, only the ways
-	        function withIndex(arr) {
-	            var result = new Array(arr.length);
-	            for (var i = 0; i < arr.length; i++) {
-	                result[i] = Object.assign({}, arr[i]);   // shallow copy
-	                result[i].index = i;
-	            }
-	            return result;
-	        }
+	  _createClass(PtRounder, [{
+	    key: "reset",
+	    value: function reset() {
+	      this.xRounder = new CoordRounder();
+	      this.yRounder = new CoordRounder();
 	    }
+	  }, {
+	    key: "round",
+	    value: function round(x, y) {
+	      return {
+	        x: this.xRounder.round(x),
+	        y: this.yRounder.round(y)
+	      };
+	    }
+	  }]);
 
-	}
-
-	function actionAddMidpoint(midpoint, node) {
-	    return function(graph) {
-	        graph = graph.replace(node.move(midpoint.loc));
-
-	        var parents = utilArrayIntersection(
-	            graph.parentWays(graph.entity(midpoint.edge[0])),
-	            graph.parentWays(graph.entity(midpoint.edge[1]))
-	        );
-
-	        parents.forEach(function(way) {
-	            for (var i = 0; i < way.nodes.length - 1; i++) {
-	                if (geoEdgeEqual([way.nodes[i], way.nodes[i + 1]], midpoint.edge)) {
-	                    graph = graph.replace(graph.entity(way.id).addNode(node.id, i + 1));
+	  return PtRounder;
+	}();
 
-	                    // Add only one midpoint on doubled-back segments,
-	                    // turning them into self-intersections.
-	                    return;
-	                }
-	            }
-	        });
+	var CoordRounder = /*#__PURE__*/function () {
+	  function CoordRounder() {
+	    _classCallCheck(this, CoordRounder);
 
-	        return graph;
-	    };
-	}
+	    this.tree = new Tree(); // preseed with 0 so we don't end up with values < Number.EPSILON
 
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/AddNodeToWayAction.as
-	function actionAddVertex(wayId, nodeId, index) {
-	    return function(graph) {
-	        return graph.replace(graph.entity(wayId).addNode(nodeId, index));
-	    };
-	}
+	    this.round(0);
+	  } // Note: this can rounds input values backwards or forwards.
+	  //       You might ask, why not restrict this to just rounding
+	  //       forwards? Wouldn't that allow left endpoints to always
+	  //       remain left endpoints during splitting (never change to
+	  //       right). No - it wouldn't, because we snap intersections
+	  //       to endpoints (to establish independence from the segment
+	  //       angle for t-intersections).
 
-	function actionChangeMember(relationId, member, memberIndex) {
-	    return function(graph) {
-	        return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
-	    };
-	}
 
-	function actionChangePreset(entityID, oldPreset, newPreset, skipFieldDefaults) {
-	    return function action(graph) {
-	        var entity = graph.entity(entityID);
-	        var geometry = entity.geometry(graph);
-	        var tags = entity.tags;
+	  _createClass(CoordRounder, [{
+	    key: "round",
+	    value: function round(coord) {
+	      var node = this.tree.add(coord);
+	      var prevNode = this.tree.prev(node);
 
-	        if (oldPreset) { tags = oldPreset.unsetTags(tags, geometry); }
-	        if (newPreset) { tags = newPreset.setTags(tags, geometry, skipFieldDefaults); }
+	      if (prevNode !== null && cmp(node.key, prevNode.key) === 0) {
+	        this.tree.remove(coord);
+	        return prevNode.key;
+	      }
 
-	        return graph.replace(entity.update({tags: tags}));
-	    };
-	}
+	      var nextNode = this.tree.next(node);
 
-	function actionChangeTags(entityId, tags) {
-	    return function(graph) {
-	        var entity = graph.entity(entityId);
-	        return graph.replace(entity.update({tags: tags}));
-	    };
-	}
+	      if (nextNode !== null && cmp(node.key, nextNode.key) === 0) {
+	        this.tree.remove(coord);
+	        return nextNode.key;
+	      }
 
-	function osmNode() {
-	    if (!(this instanceof osmNode)) {
-	        return (new osmNode()).initialize(arguments);
-	    } else if (arguments.length) {
-	        this.initialize(arguments);
+	      return coord;
 	    }
-	}
+	  }]);
 
-	osmEntity.node = osmNode;
+	  return CoordRounder;
+	}(); // singleton available by import
 
-	osmNode.prototype = Object.create(osmEntity.prototype);
 
-	Object.assign(osmNode.prototype, {
-	    type: 'node',
-	    loc: [9999, 9999],
+	var rounder = new PtRounder();
+	/* Cross Product of two vectors with first point at origin */
 
-	    extent: function() {
-	        return new geoExtent(this.loc);
-	    },
+	var crossProduct = function crossProduct(a, b) {
+	  return a.x * b.y - a.y * b.x;
+	};
+	/* Dot Product of two vectors with first point at origin */
 
 
-	    geometry: function(graph) {
-	        return graph.transient(this, 'geometry', function() {
-	            return graph.isPoi(this) ? 'point' : 'vertex';
-	        });
-	    },
+	var dotProduct = function dotProduct(a, b) {
+	  return a.x * b.x + a.y * b.y;
+	};
+	/* Comparator for two vectors with same starting point */
 
 
-	    move: function(loc) {
-	        return this.update({loc: loc});
-	    },
+	var compareVectorAngles = function compareVectorAngles(basePt, endPt1, endPt2) {
+	  var v1 = {
+	    x: endPt1.x - basePt.x,
+	    y: endPt1.y - basePt.y
+	  };
+	  var v2 = {
+	    x: endPt2.x - basePt.x,
+	    y: endPt2.y - basePt.y
+	  };
+	  var kross = crossProduct(v1, v2);
+	  return cmp(kross, 0);
+	};
 
+	var length = function length(v) {
+	  return Math.sqrt(dotProduct(v, v));
+	};
+	/* Get the sine of the angle from pShared -> pAngle to pShaed -> pBase */
 
-	    isDegenerate: function() {
-	        return !(
-	            Array.isArray(this.loc) && this.loc.length === 2 &&
-	            this.loc[0] >= -180 && this.loc[0] <= 180 &&
-	            this.loc[1] >= -90 && this.loc[1] <= 90
-	        );
-	    },
 
+	var sineOfAngle = function sineOfAngle(pShared, pBase, pAngle) {
+	  var vBase = {
+	    x: pBase.x - pShared.x,
+	    y: pBase.y - pShared.y
+	  };
+	  var vAngle = {
+	    x: pAngle.x - pShared.x,
+	    y: pAngle.y - pShared.y
+	  };
+	  return crossProduct(vAngle, vBase) / length(vAngle) / length(vBase);
+	};
+	/* Get the cosine of the angle from pShared -> pAngle to pShaed -> pBase */
 
-	    // Inspect tags and geometry to determine which direction(s) this node/vertex points
-	    directions: function(resolver, projection) {
-	        var val;
-	        var i;
 
-	        // which tag to use?
-	        if (this.isHighwayIntersection(resolver) && (this.tags.stop || '').toLowerCase() === 'all') {
-	            // all-way stop tag on a highway intersection
-	            val = 'all';
-	        } else {
-	            // generic direction tag
-	            val = (this.tags.direction || '').toLowerCase();
-
-	            // better suffix-style direction tag
-	            var re = /:direction$/i;
-	            var keys = Object.keys(this.tags);
-	            for (i = 0; i < keys.length; i++) {
-	                if (re.test(keys[i])) {
-	                    val = this.tags[keys[i]].toLowerCase();
-	                    break;
-	                }
-	            }
-	        }
+	var cosineOfAngle = function cosineOfAngle(pShared, pBase, pAngle) {
+	  var vBase = {
+	    x: pBase.x - pShared.x,
+	    y: pBase.y - pShared.y
+	  };
+	  var vAngle = {
+	    x: pAngle.x - pShared.x,
+	    y: pAngle.y - pShared.y
+	  };
+	  return dotProduct(vAngle, vBase) / length(vAngle) / length(vBase);
+	};
+	/* Get the x coordinate where the given line (defined by a point and vector)
+	 * crosses the horizontal line with the given y coordiante.
+	 * In the case of parrallel lines (including overlapping ones) returns null. */
 
-	        if (val === '') { return []; }
-
-	        var cardinal = {
-	            north: 0,               n: 0,
-	            northnortheast: 22,     nne: 22,
-	            northeast: 45,          ne: 45,
-	            eastnortheast: 67,      ene: 67,
-	            east: 90,               e: 90,
-	            eastsoutheast: 112,     ese: 112,
-	            southeast: 135,         se: 135,
-	            southsoutheast: 157,    sse: 157,
-	            south: 180,             s: 180,
-	            southsouthwest: 202,    ssw: 202,
-	            southwest: 225,         sw: 225,
-	            westsouthwest: 247,     wsw: 247,
-	            west: 270,              w: 270,
-	            westnorthwest: 292,     wnw: 292,
-	            northwest: 315,         nw: 315,
-	            northnorthwest: 337,    nnw: 337
-	        };
 
+	var horizontalIntersection = function horizontalIntersection(pt, v, y) {
+	  if (v.y === 0) return null;
+	  return {
+	    x: pt.x + v.x / v.y * (y - pt.y),
+	    y: y
+	  };
+	};
+	/* Get the y coordinate where the given line (defined by a point and vector)
+	 * crosses the vertical line with the given x coordiante.
+	 * In the case of parrallel lines (including overlapping ones) returns null. */
 
-	        var values = val.split(';');
-	        var results = [];
 
-	        values.forEach(function(v) {
-	            // swap cardinal for numeric directions
-	            if (cardinal[v] !== undefined) {
-	                v = cardinal[v];
-	            }
+	var verticalIntersection = function verticalIntersection(pt, v, x) {
+	  if (v.x === 0) return null;
+	  return {
+	    x: x,
+	    y: pt.y + v.y / v.x * (x - pt.x)
+	  };
+	};
+	/* Get the intersection of two lines, each defined by a base point and a vector.
+	 * In the case of parrallel lines (including overlapping ones) returns null. */
+
+
+	var intersection = function intersection(pt1, v1, pt2, v2) {
+	  // take some shortcuts for vertical and horizontal lines
+	  // this also ensures we don't calculate an intersection and then discover
+	  // it's actually outside the bounding box of the line
+	  if (v1.x === 0) return verticalIntersection(pt2, v2, pt1.x);
+	  if (v2.x === 0) return verticalIntersection(pt1, v1, pt2.x);
+	  if (v1.y === 0) return horizontalIntersection(pt2, v2, pt1.y);
+	  if (v2.y === 0) return horizontalIntersection(pt1, v1, pt2.y); // General case for non-overlapping segments.
+	  // This algorithm is based on Schneider and Eberly.
+	  // http://www.cimec.org.ar/~ncalvo/Schneider_Eberly.pdf - pg 244
+
+	  var kross = crossProduct(v1, v2);
+	  if (kross == 0) return null;
+	  var ve = {
+	    x: pt2.x - pt1.x,
+	    y: pt2.y - pt1.y
+	  };
+	  var d1 = crossProduct(ve, v1) / kross;
+	  var d2 = crossProduct(ve, v2) / kross; // take the average of the two calculations to minimize rounding error
+
+	  var x1 = pt1.x + d2 * v1.x,
+	      x2 = pt2.x + d1 * v2.x;
+	  var y1 = pt1.y + d2 * v1.y,
+	      y2 = pt2.y + d1 * v2.y;
+	  var x = (x1 + x2) / 2;
+	  var y = (y1 + y2) / 2;
+	  return {
+	    x: x,
+	    y: y
+	  };
+	};
 
-	            // numeric direction - just add to results
-	            if (v !== '' && !isNaN(+v)) {
-	                results.push(+v);
-	                return;
-	            }
+	var SweepEvent = /*#__PURE__*/function () {
+	  _createClass(SweepEvent, null, [{
+	    key: "compare",
+	    // for ordering sweep events in the sweep event queue
+	    value: function compare(a, b) {
+	      // favor event with a point that the sweep line hits first
+	      var ptCmp = SweepEvent.comparePoints(a.point, b.point);
+	      if (ptCmp !== 0) return ptCmp; // the points are the same, so link them if needed
 
-	            // string direction - inspect parent ways
-	            var lookBackward =
-	                (this.tags['traffic_sign:backward'] || v === 'backward' || v === 'both' || v === 'all');
-	            var lookForward =
-	                (this.tags['traffic_sign:forward'] || v === 'forward' || v === 'both' || v === 'all');
-
-	            if (!lookForward && !lookBackward) { return; }
-
-	            var nodeIds = {};
-	            resolver.parentWays(this).forEach(function(parent) {
-	                var nodes = parent.nodes;
-	                for (i = 0; i < nodes.length; i++) {
-	                    if (nodes[i] === this.id) {  // match current entity
-	                        if (lookForward && i > 0) {
-	                            nodeIds[nodes[i - 1]] = true;  // look back to prev node
-	                        }
-	                        if (lookBackward && i < nodes.length - 1) {
-	                            nodeIds[nodes[i + 1]] = true;  // look ahead to next node
-	                        }
-	                    }
-	                }
-	            }, this);
+	      if (a.point !== b.point) a.link(b); // favor right events over left
 
-	            Object.keys(nodeIds).forEach(function(nodeId) {
-	                // +90 because geoAngle returns angle from X axis, not Y (north)
-	                results.push(
-	                    (geoAngle(this, resolver.entity(nodeId), projection) * (180 / Math.PI)) + 90
-	                );
-	            }, this);
+	      if (a.isLeft !== b.isLeft) return a.isLeft ? 1 : -1; // we have two matching left or right endpoints
+	      // ordering of this case is the same as for their segments
 
-	        }, this);
+	      return Segment.compare(a.segment, b.segment);
+	    } // for ordering points in sweep line order
 
-	        return utilArrayUniq(results);
-	    },
+	  }, {
+	    key: "comparePoints",
+	    value: function comparePoints(aPt, bPt) {
+	      if (aPt.x < bPt.x) return -1;
+	      if (aPt.x > bPt.x) return 1;
+	      if (aPt.y < bPt.y) return -1;
+	      if (aPt.y > bPt.y) return 1;
+	      return 0;
+	    } // Warning: 'point' input will be modified and re-used (for performance)
+
+	  }]);
+
+	  function SweepEvent(point, isLeft) {
+	    _classCallCheck(this, SweepEvent);
+
+	    if (point.events === undefined) point.events = [this];else point.events.push(this);
+	    this.point = point;
+	    this.isLeft = isLeft; // this.segment, this.otherSE set by factory
+	  }
+
+	  _createClass(SweepEvent, [{
+	    key: "link",
+	    value: function link(other) {
+	      if (other.point === this.point) {
+	        throw new Error('Tried to link already linked events');
+	      }
 
+	      var otherEvents = other.point.events;
 
-	    isEndpoint: function(resolver) {
-	        return resolver.transient(this, 'isEndpoint', function() {
-	            var id = this.id;
-	            return resolver.parentWays(this).filter(function(parent) {
-	                return !parent.isClosed() && !!parent.affix(id);
-	            }).length > 0;
-	        });
-	    },
+	      for (var i = 0, iMax = otherEvents.length; i < iMax; i++) {
+	        var evt = otherEvents[i];
+	        this.point.events.push(evt);
+	        evt.point = this.point;
+	      }
 
+	      this.checkForConsuming();
+	    }
+	    /* Do a pass over our linked events and check to see if any pair
+	     * of segments match, and should be consumed. */
 
-	    isConnected: function(resolver) {
-	        return resolver.transient(this, 'isConnected', function() {
-	            var parents = resolver.parentWays(this);
+	  }, {
+	    key: "checkForConsuming",
+	    value: function checkForConsuming() {
+	      // FIXME: The loops in this method run O(n^2) => no good.
+	      //        Maintain little ordered sweep event trees?
+	      //        Can we maintaining an ordering that avoids the need
+	      //        for the re-sorting with getLeftmostComparator in geom-out?
+	      // Compare each pair of events to see if other events also match
+	      var numEvents = this.point.events.length;
+
+	      for (var i = 0; i < numEvents; i++) {
+	        var evt1 = this.point.events[i];
+	        if (evt1.segment.consumedBy !== undefined) continue;
+
+	        for (var j = i + 1; j < numEvents; j++) {
+	          var evt2 = this.point.events[j];
+	          if (evt2.consumedBy !== undefined) continue;
+	          if (evt1.otherSE.point.events !== evt2.otherSE.point.events) continue;
+	          evt1.segment.consume(evt2.segment);
+	        }
+	      }
+	    }
+	  }, {
+	    key: "getAvailableLinkedEvents",
+	    value: function getAvailableLinkedEvents() {
+	      // point.events is always of length 2 or greater
+	      var events = [];
 
-	            if (parents.length > 1) {
-	                // vertex is connected to multiple parent ways
-	                for (var i in parents) {
-	                    if (parents[i].geometry(resolver) === 'line' &&
-	                        parents[i].hasInterestingTags()) { return true; }
-	                }
-	            } else if (parents.length === 1) {
-	                var way = parents[0];
-	                var nodes = way.nodes.slice();
-	                if (way.isClosed()) { nodes.pop(); }  // ignore connecting node if closed
+	      for (var i = 0, iMax = this.point.events.length; i < iMax; i++) {
+	        var evt = this.point.events[i];
 
-	                // return true if vertex appears multiple times (way is self intersecting)
-	                return nodes.indexOf(this.id) !== nodes.lastIndexOf(this.id);
-	            }
+	        if (evt !== this && !evt.segment.ringOut && evt.segment.isInResult()) {
+	          events.push(evt);
+	        }
+	      }
 
-	            return false;
-	        });
-	    },
+	      return events;
+	    }
+	    /**
+	     * Returns a comparator function for sorting linked events that will
+	     * favor the event that will give us the smallest left-side angle.
+	     * All ring construction starts as low as possible heading to the right,
+	     * so by always turning left as sharp as possible we'll get polygons
+	     * without uncessary loops & holes.
+	     *
+	     * The comparator function has a compute cache such that it avoids
+	     * re-computing already-computed values.
+	     */
 
+	  }, {
+	    key: "getLeftmostComparator",
+	    value: function getLeftmostComparator(baseEvent) {
+	      var _this = this;
 
-	    parentIntersectionWays: function(resolver) {
-	        return resolver.transient(this, 'parentIntersectionWays', function() {
-	            return resolver.parentWays(this).filter(function(parent) {
-	                return (parent.tags.highway ||
-	                    parent.tags.waterway ||
-	                    parent.tags.railway ||
-	                    parent.tags.aeroway) &&
-	                    parent.geometry(resolver) === 'line';
-	            });
-	        });
-	    },
+	      var cache = new Map();
 
+	      var fillCache = function fillCache(linkedEvent) {
+	        var nextEvent = linkedEvent.otherSE;
+	        cache.set(linkedEvent, {
+	          sine: sineOfAngle(_this.point, baseEvent.point, nextEvent.point),
+	          cosine: cosineOfAngle(_this.point, baseEvent.point, nextEvent.point)
+	        });
+	      };
 
-	    isIntersection: function(resolver) {
-	        return this.parentIntersectionWays(resolver).length > 1;
-	    },
+	      return function (a, b) {
+	        if (!cache.has(a)) fillCache(a);
+	        if (!cache.has(b)) fillCache(b);
 
+	        var _cache$get = cache.get(a),
+	            asine = _cache$get.sine,
+	            acosine = _cache$get.cosine;
 
-	    isHighwayIntersection: function(resolver) {
-	        return resolver.transient(this, 'isHighwayIntersection', function() {
-	            return resolver.parentWays(this).filter(function(parent) {
-	                return parent.tags.highway && parent.geometry(resolver) === 'line';
-	            }).length > 1;
-	        });
-	    },
+	        var _cache$get2 = cache.get(b),
+	            bsine = _cache$get2.sine,
+	            bcosine = _cache$get2.cosine; // both on or above x-axis
 
 
-	    isOnAddressLine: function(resolver) {
-	        return resolver.transient(this, 'isOnAddressLine', function() {
-	            return resolver.parentWays(this).filter(function(parent) {
-	                return parent.tags.hasOwnProperty('addr:interpolation') &&
-	                    parent.geometry(resolver) === 'line';
-	            }).length > 0;
-	        });
-	    },
+	        if (asine >= 0 && bsine >= 0) {
+	          if (acosine < bcosine) return 1;
+	          if (acosine > bcosine) return -1;
+	          return 0;
+	        } // both below x-axis
 
 
-	    asJXON: function(changeset_id) {
-	        var r = {
-	            node: {
-	                '@id': this.osmId(),
-	                '@lon': this.loc[0],
-	                '@lat': this.loc[1],
-	                '@version': (this.version || 0),
-	                tag: Object.keys(this.tags).map(function(k) {
-	                    return { keyAttributes: { k: k, v: this.tags[k] } };
-	                }, this)
-	            }
-	        };
-	        if (changeset_id) { r.node['@changeset'] = changeset_id; }
-	        return r;
-	    },
+	        if (asine < 0 && bsine < 0) {
+	          if (acosine < bcosine) return -1;
+	          if (acosine > bcosine) return 1;
+	          return 0;
+	        } // one above x-axis, one below
 
 
-	    asGeoJSON: function() {
-	        return {
-	            type: 'Point',
-	            coordinates: this.loc
-	        };
+	        if (bsine < asine) return -1;
+	        if (bsine > asine) return 1;
+	        return 0;
+	      };
 	    }
-	});
+	  }]);
 
-	function actionCircularize(wayId, projection, maxAngle) {
-	    maxAngle = (maxAngle || 20) * Math.PI / 180;
+	  return SweepEvent;
+	}(); // segments and sweep events when all else is identical
 
 
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
+	var segmentId = 0;
 
-	        var way = graph.entity(wayId);
-	        var origNodes = {};
+	var Segment = /*#__PURE__*/function () {
+	  _createClass(Segment, null, [{
+	    key: "compare",
 
-	        graph.childNodes(way).forEach(function(node) {
-	            if (!origNodes[node.id]) { origNodes[node.id] = node; }
-	        });
+	    /* This compare() function is for ordering segments in the sweep
+	     * line tree, and does so according to the following criteria:
+	     *
+	     * Consider the vertical line that lies an infinestimal step to the
+	     * right of the right-more of the two left endpoints of the input
+	     * segments. Imagine slowly moving a point up from negative infinity
+	     * in the increasing y direction. Which of the two segments will that
+	     * point intersect first? That segment comes 'before' the other one.
+	     *
+	     * If neither segment would be intersected by such a line, (if one
+	     * or more of the segments are vertical) then the line to be considered
+	     * is directly on the right-more of the two left inputs.
+	     */
+	    value: function compare(a, b) {
+	      var alx = a.leftSE.point.x;
+	      var blx = b.leftSE.point.x;
+	      var arx = a.rightSE.point.x;
+	      var brx = b.rightSE.point.x; // check if they're even in the same vertical plane
+
+	      if (brx < alx) return 1;
+	      if (arx < blx) return -1;
+	      var aly = a.leftSE.point.y;
+	      var bly = b.leftSE.point.y;
+	      var ary = a.rightSE.point.y;
+	      var bry = b.rightSE.point.y; // is left endpoint of segment B the right-more?
+
+	      if (alx < blx) {
+	        // are the two segments in the same horizontal plane?
+	        if (bly < aly && bly < ary) return 1;
+	        if (bly > aly && bly > ary) return -1; // is the B left endpoint colinear to segment A?
+
+	        var aCmpBLeft = a.comparePoint(b.leftSE.point);
+	        if (aCmpBLeft < 0) return 1;
+	        if (aCmpBLeft > 0) return -1; // is the A right endpoint colinear to segment B ?
+
+	        var bCmpARight = b.comparePoint(a.rightSE.point);
+	        if (bCmpARight !== 0) return bCmpARight; // colinear segments, consider the one with left-more
+	        // left endpoint to be first (arbitrary?)
 
-	        if (!way.isConvex(graph)) {
-	            graph = action.makeConvex(graph);
-	        }
-
-	        var nodes = utilArrayUniq(graph.childNodes(way));
-	        var keyNodes = nodes.filter(function(n) { return graph.parentWays(n).length !== 1; });
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var keyPoints = keyNodes.map(function(n) { return projection(n.loc); });
-	        var centroid = (points.length === 2) ? geoVecInterp(points[0], points[1], 0.5) : d3_polygonCentroid(points);
-	        var radius = d3_median(points, function(p) { return geoVecLength(centroid, p); });
-	        var sign = d3_polygonArea(points) > 0 ? 1 : -1;
-	        var ids, i, j, k;
-
-	        // we need atleast two key nodes for the algorithm to work
-	        if (!keyNodes.length) {
-	            keyNodes = [nodes[0]];
-	            keyPoints = [points[0]];
-	        }
-
-	        if (keyNodes.length === 1) {
-	            var index = nodes.indexOf(keyNodes[0]);
-	            var oppositeIndex = Math.floor((index + nodes.length / 2) % nodes.length);
-
-	            keyNodes.push(nodes[oppositeIndex]);
-	            keyPoints.push(points[oppositeIndex]);
-	        }
-
-	        // key points and nodes are those connected to the ways,
-	        // they are projected onto the circle, inbetween nodes are moved
-	        // to constant intervals between key nodes, extra inbetween nodes are
-	        // added if necessary.
-	        for (i = 0; i < keyPoints.length; i++) {
-	            var nextKeyNodeIndex = (i + 1) % keyNodes.length;
-	            var startNode = keyNodes[i];
-	            var endNode = keyNodes[nextKeyNodeIndex];
-	            var startNodeIndex = nodes.indexOf(startNode);
-	            var endNodeIndex = nodes.indexOf(endNode);
-	            var numberNewPoints = -1;
-	            var indexRange = endNodeIndex - startNodeIndex;
-	            var nearNodes = {};
-	            var inBetweenNodes = [];
-	            var startAngle, endAngle, totalAngle, eachAngle;
-	            var angle, loc, node, origNode;
-
-	            if (indexRange < 0) {
-	                indexRange += nodes.length;
-	            }
+	        return -1;
+	      } // is left endpoint of segment A the right-more?
 
-	            // position this key node
-	            var distance = geoVecLength(centroid, keyPoints[i]) || 1e-4;
-	            keyPoints[i] = [
-	                centroid[0] + (keyPoints[i][0] - centroid[0]) / distance * radius,
-	                centroid[1] + (keyPoints[i][1] - centroid[1]) / distance * radius
-	            ];
-	            loc = projection.invert(keyPoints[i]);
-	            node = keyNodes[i];
-	            origNode = origNodes[node.id];
-	            node = node.move(geoVecInterp(origNode.loc, loc, t));
-	            graph = graph.replace(node);
-
-	            // figure out the between delta angle we want to match to
-	            startAngle = Math.atan2(keyPoints[i][1] - centroid[1], keyPoints[i][0] - centroid[0]);
-	            endAngle = Math.atan2(keyPoints[nextKeyNodeIndex][1] - centroid[1], keyPoints[nextKeyNodeIndex][0] - centroid[0]);
-	            totalAngle = endAngle - startAngle;
-
-	            // detects looping around -pi/pi
-	            if (totalAngle * sign > 0) {
-	                totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
-	            }
 
-	            do {
-	                numberNewPoints++;
-	                eachAngle = totalAngle / (indexRange + numberNewPoints);
-	            } while (Math.abs(eachAngle) > maxAngle);
+	      if (alx > blx) {
+	        if (aly < bly && aly < bry) return -1;
+	        if (aly > bly && aly > bry) return 1; // is the A left endpoint colinear to segment B?
 
+	        var bCmpALeft = b.comparePoint(a.leftSE.point);
+	        if (bCmpALeft !== 0) return bCmpALeft; // is the B right endpoint colinear to segment A?
 
-	            // move existing nodes
-	            for (j = 1; j < indexRange; j++) {
-	                angle = startAngle + j * eachAngle;
-	                loc = projection.invert([
-	                    centroid[0] + Math.cos(angle) * radius,
-	                    centroid[1] + Math.sin(angle) * radius
-	                ]);
+	        var aCmpBRight = a.comparePoint(b.rightSE.point);
+	        if (aCmpBRight < 0) return 1;
+	        if (aCmpBRight > 0) return -1; // colinear segments, consider the one with left-more
+	        // left endpoint to be first (arbitrary?)
 
-	                node = nodes[(j + startNodeIndex) % nodes.length];
-	                origNode = origNodes[node.id];
-	                nearNodes[node.id] = angle;
+	        return 1;
+	      } // if we get here, the two left endpoints are in the same
+	      // vertical plane, ie alx === blx
+	      // consider the lower left-endpoint to come first
 
-	                node = node.move(geoVecInterp(origNode.loc, loc, t));
-	                graph = graph.replace(node);
-	            }
 
-	            // add new inbetween nodes if necessary
-	            for (j = 0; j < numberNewPoints; j++) {
-	                angle = startAngle + (indexRange + j) * eachAngle;
-	                loc = projection.invert([
-	                    centroid[0] + Math.cos(angle) * radius,
-	                    centroid[1] + Math.sin(angle) * radius
-	                ]);
-
-	                // choose a nearnode to use as the original
-	                var min = Infinity;
-	                for (var nodeId in nearNodes) {
-	                    var nearAngle = nearNodes[nodeId];
-	                    var dist = Math.abs(nearAngle - angle);
-	                    if (dist < min) {
-	                        dist = min;
-	                        origNode = origNodes[nodeId];
-	                    }
-	                }
+	      if (aly < bly) return -1;
+	      if (aly > bly) return 1; // left endpoints are identical
+	      // check for colinearity by using the left-more right endpoint
+	      // is the A right endpoint more left-more?
 
-	                node = osmNode({ loc: geoVecInterp(origNode.loc, loc, t) });
-	                graph = graph.replace(node);
+	      if (arx < brx) {
+	        var _bCmpARight = b.comparePoint(a.rightSE.point);
 
-	                nodes.splice(endNodeIndex + j, 0, node);
-	                inBetweenNodes.push(node.id);
-	            }
+	        if (_bCmpARight !== 0) return _bCmpARight;
+	      } // is the B right endpoint more left-more?
 
-	            // Check for other ways that share these keyNodes..
-	            // If keyNodes are adjacent in both ways,
-	            // we can add inBetween nodes to that shared way too..
-	            if (indexRange === 1 && inBetweenNodes.length) {
-	                var startIndex1 = way.nodes.lastIndexOf(startNode.id);
-	                var endIndex1 = way.nodes.lastIndexOf(endNode.id);
-	                var wayDirection1 = (endIndex1 - startIndex1);
-	                if (wayDirection1 < -1) { wayDirection1 = 1; }
-
-	                var parentWays = graph.parentWays(keyNodes[i]);
-	                for (j = 0; j < parentWays.length; j++) {
-	                    var sharedWay = parentWays[j];
-	                    if (sharedWay === way) { continue; }
-
-	                    if (sharedWay.areAdjacent(startNode.id, endNode.id)) {
-	                        var startIndex2 = sharedWay.nodes.lastIndexOf(startNode.id);
-	                        var endIndex2 = sharedWay.nodes.lastIndexOf(endNode.id);
-	                        var wayDirection2 = (endIndex2 - startIndex2);
-	                        var insertAt = endIndex2;
-	                        if (wayDirection2 < -1) { wayDirection2 = 1; }
-
-	                        if (wayDirection1 !== wayDirection2) {
-	                            inBetweenNodes.reverse();
-	                            insertAt = startIndex2;
-	                        }
-	                        for (k = 0; k < inBetweenNodes.length; k++) {
-	                            sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
-	                        }
-	                        graph = graph.replace(sharedWay);
-	                    }
-	                }
-	            }
 
-	        }
+	      if (arx > brx) {
+	        var _aCmpBRight = a.comparePoint(b.rightSE.point);
 
-	        // update the way to have all the new nodes
-	        ids = nodes.map(function(n) { return n.id; });
-	        ids.push(ids[0]);
+	        if (_aCmpBRight < 0) return 1;
+	        if (_aCmpBRight > 0) return -1;
+	      }
 
-	        way = way.update({nodes: ids});
-	        graph = graph.replace(way);
+	      if (arx !== brx) {
+	        // are these two [almost] vertical segments with opposite orientation?
+	        // if so, the one with the lower right endpoint comes first
+	        var ay = ary - aly;
+	        var ax = arx - alx;
+	        var by = bry - bly;
+	        var bx = brx - blx;
+	        if (ay > ax && by < bx) return 1;
+	        if (ay < ax && by > bx) return -1;
+	      } // we have colinear segments with matching orientation
+	      // consider the one with more left-more right endpoint to be first
 
-	        return graph;
-	    };
 
+	      if (arx > brx) return 1;
+	      if (arx < brx) return -1; // if we get here, two two right endpoints are in the same
+	      // vertical plane, ie arx === brx
+	      // consider the lower right-endpoint to come first
 
-	    action.makeConvex = function(graph) {
-	        var way = graph.entity(wayId);
-	        var nodes = utilArrayUniq(graph.childNodes(way));
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var sign = d3_polygonArea(points) > 0 ? 1 : -1;
-	        var hull = d3_polygonHull(points);
-	        var i, j;
+	      if (ary < bry) return -1;
+	      if (ary > bry) return 1; // right endpoints identical as well, so the segments are idential
+	      // fall back on creation order as consistent tie-breaker
 
-	        // D3 convex hulls go counterclockwise..
-	        if (sign === -1) {
-	            nodes.reverse();
-	            points.reverse();
-	        }
+	      if (a.id < b.id) return -1;
+	      if (a.id > b.id) return 1; // identical segment, ie a === b
 
-	        for (i = 0; i < hull.length - 1; i++) {
-	            var startIndex = points.indexOf(hull[i]);
-	            var endIndex = points.indexOf(hull[i+1]);
-	            var indexRange = (endIndex - startIndex);
+	      return 0;
+	    }
+	    /* Warning: a reference to ringWindings input will be stored,
+	     *  and possibly will be later modified */
 
-	            if (indexRange < 0) {
-	                indexRange += nodes.length;
-	            }
+	  }]);
 
-	            // move interior nodes to the surface of the convex hull..
-	            for (j = 1; j < indexRange; j++) {
-	                var point = geoVecInterp(hull[i], hull[i+1], j / indexRange);
-	                var node = nodes[(j + startIndex) % nodes.length].move(projection.invert(point));
-	                graph = graph.replace(node);
-	            }
-	        }
-	        return graph;
-	    };
+	  function Segment(leftSE, rightSE, rings, windings) {
+	    _classCallCheck(this, Segment);
 
+	    this.id = ++segmentId;
+	    this.leftSE = leftSE;
+	    leftSE.segment = this;
+	    leftSE.otherSE = rightSE;
+	    this.rightSE = rightSE;
+	    rightSE.segment = this;
+	    rightSE.otherSE = leftSE;
+	    this.rings = rings;
+	    this.windings = windings; // left unset for performance, set later in algorithm
+	    // this.ringOut, this.consumedBy, this.prev
+	  }
 
-	    action.disabled = function(graph) {
-	        if (!graph.entity(wayId).isClosed()) {
-	            return 'not_closed';
-	        }
+	  _createClass(Segment, [{
+	    key: "replaceRightSE",
 
-	        //disable when already circular
-	        var way = graph.entity(wayId);
-	        var nodes = utilArrayUniq(graph.childNodes(way));
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var hull = d3_polygonHull(points);
-	        var epsilonAngle =  Math.PI / 180;
-	        if (hull.length !== points.length || hull.length < 3){
-	            return false;
-	        }
-	        var centroid = d3_polygonCentroid(points);
-	        var radius = geoVecLengthSquare(centroid, points[0]);
-
-	        // compare distances between centroid and points
-	        for (var i = 0; i<hull.length; i++){
-	            var actualPoint = hull[i];
-	            var actualDist = geoVecLengthSquare(actualPoint, centroid);
-	            var diff = Math.abs(actualDist - radius);
-	            //compare distances with epsilon-error (5%)
-	            if (diff > 0.05*radius) {
-	                return false;
-	            }
-	        }
-	        
-	        //check if central angles are smaller than maxAngle
-	        for (i = 0; i<hull.length; i++){
-	            actualPoint = hull[i];
-	            var nextPoint = hull[(i+1)%hull.length];
-	            var startAngle = Math.atan2(actualPoint[1] - centroid[1], actualPoint[0] - centroid[0]);
-	            var endAngle = Math.atan2(nextPoint[1] - centroid[1], nextPoint[0] - centroid[0]);
-	            var angle = endAngle - startAngle;
-	            if (angle < 0) {
-	                angle = -angle;
-	            }
-	            if (angle > Math.PI){
-	                angle = (2*Math.PI - angle);
-	            }
-	 
-	            if (angle > maxAngle + epsilonAngle) {
-	                return false;
-	            }
+	    /* When a segment is split, the rightSE is replaced with a new sweep event */
+	    value: function replaceRightSE(newRightSE) {
+	      this.rightSE = newRightSE;
+	      this.rightSE.segment = this;
+	      this.rightSE.otherSE = this.leftSE;
+	      this.leftSE.otherSE = this.rightSE;
+	    }
+	  }, {
+	    key: "bbox",
+	    value: function bbox() {
+	      var y1 = this.leftSE.point.y;
+	      var y2 = this.rightSE.point.y;
+	      return {
+	        ll: {
+	          x: this.leftSE.point.x,
+	          y: y1 < y2 ? y1 : y2
+	        },
+	        ur: {
+	          x: this.rightSE.point.x,
+	          y: y1 > y2 ? y1 : y2
 	        }
-	        return 'already_circular';
-	    };
+	      };
+	    }
+	    /* A vector from the left point to the right */
 
+	  }, {
+	    key: "vector",
+	    value: function vector() {
+	      return {
+	        x: this.rightSE.point.x - this.leftSE.point.x,
+	        y: this.rightSE.point.y - this.leftSE.point.y
+	      };
+	    }
+	  }, {
+	    key: "isAnEndpoint",
+	    value: function isAnEndpoint(pt) {
+	      return pt.x === this.leftSE.point.x && pt.y === this.leftSE.point.y || pt.x === this.rightSE.point.x && pt.y === this.rightSE.point.y;
+	    }
+	    /* Compare this segment with a point.
+	     *
+	     * A point P is considered to be colinear to a segment if there
+	     * exists a distance D such that if we travel along the segment
+	     * from one * endpoint towards the other a distance D, we find
+	     * ourselves at point P.
+	     *
+	     * Return value indicates:
+	     *
+	     *   1: point lies above the segment (to the left of vertical)
+	     *   0: point is colinear to segment
+	     *  -1: point lies below the segment (to the right of vertical)
+	     */
 
-	    action.transitionable = true;
+	  }, {
+	    key: "comparePoint",
+	    value: function comparePoint(point) {
+	      if (this.isAnEndpoint(point)) return 0;
+	      var lPt = this.leftSE.point;
+	      var rPt = this.rightSE.point;
+	      var v = this.vector(); // Exactly vertical segments.
+
+	      if (lPt.x === rPt.x) {
+	        if (point.x === lPt.x) return 0;
+	        return point.x < lPt.x ? 1 : -1;
+	      } // Nearly vertical segments with an intersection.
+	      // Check to see where a point on the line with matching Y coordinate is.
+
+
+	      var yDist = (point.y - lPt.y) / v.y;
+	      var xFromYDist = lPt.x + yDist * v.x;
+	      if (point.x === xFromYDist) return 0; // General case.
+	      // Check to see where a point on the line with matching X coordinate is.
+
+	      var xDist = (point.x - lPt.x) / v.x;
+	      var yFromXDist = lPt.y + xDist * v.y;
+	      if (point.y === yFromXDist) return 0;
+	      return point.y < yFromXDist ? -1 : 1;
+	    }
+	    /**
+	     * Given another segment, returns the first non-trivial intersection
+	     * between the two segments (in terms of sweep line ordering), if it exists.
+	     *
+	     * A 'non-trivial' intersection is one that will cause one or both of the
+	     * segments to be split(). As such, 'trivial' vs. 'non-trivial' intersection:
+	     *
+	     *   * endpoint of segA with endpoint of segB --> trivial
+	     *   * endpoint of segA with point along segB --> non-trivial
+	     *   * endpoint of segB with point along segA --> non-trivial
+	     *   * point along segA with point along segB --> non-trivial
+	     *
+	     * If no non-trivial intersection exists, return null
+	     * Else, return null.
+	     */
 
+	  }, {
+	    key: "getIntersection",
+	    value: function getIntersection(other) {
+	      // If bboxes don't overlap, there can't be any intersections
+	      var tBbox = this.bbox();
+	      var oBbox = other.bbox();
+	      var bboxOverlap = getBboxOverlap(tBbox, oBbox);
+	      if (bboxOverlap === null) return null; // We first check to see if the endpoints can be considered intersections.
+	      // This will 'snap' intersections to endpoints if possible, and will
+	      // handle cases of colinearity.
+
+	      var tlp = this.leftSE.point;
+	      var trp = this.rightSE.point;
+	      var olp = other.leftSE.point;
+	      var orp = other.rightSE.point; // does each endpoint touch the other segment?
+	      // note that we restrict the 'touching' definition to only allow segments
+	      // to touch endpoints that lie forward from where we are in the sweep line pass
+
+	      var touchesOtherLSE = isInBbox(tBbox, olp) && this.comparePoint(olp) === 0;
+	      var touchesThisLSE = isInBbox(oBbox, tlp) && other.comparePoint(tlp) === 0;
+	      var touchesOtherRSE = isInBbox(tBbox, orp) && this.comparePoint(orp) === 0;
+	      var touchesThisRSE = isInBbox(oBbox, trp) && other.comparePoint(trp) === 0; // do left endpoints match?
+
+	      if (touchesThisLSE && touchesOtherLSE) {
+	        // these two cases are for colinear segments with matching left
+	        // endpoints, and one segment being longer than the other
+	        if (touchesThisRSE && !touchesOtherRSE) return trp;
+	        if (!touchesThisRSE && touchesOtherRSE) return orp; // either the two segments match exactly (two trival intersections)
+	        // or just on their left endpoint (one trivial intersection
 
-	    return action;
-	}
+	        return null;
+	      } // does this left endpoint matches (other doesn't)
 
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/DeleteWayAction.as
-	function actionDeleteWay(wayID) {
 
-	    function canDeleteNode(node, graph) {
-	        // don't delete nodes still attached to ways or relations
-	        if (graph.parentWays(node).length ||
-	            graph.parentRelations(node).length) { return false; }
+	      if (touchesThisLSE) {
+	        // check for segments that just intersect on opposing endpoints
+	        if (touchesOtherRSE) {
+	          if (tlp.x === orp.x && tlp.y === orp.y) return null;
+	        } // t-intersection on left endpoint
 
-	        var geometries = osmNodeGeometriesForTags(node.tags);
-	        // don't delete if this node can be a standalone point
-	        if (geometries.point) { return false; }
-	        // delete if this node only be a vertex
-	        if (geometries.vertex) { return true; }
 
-	        // iD doesn't know if this should be a point or vertex,
-	        // so only delete if there are no interesting tags
-	        return !node.hasInterestingTags();
-	    }
+	        return tlp;
+	      } // does other left endpoint matches (this doesn't)
 
 
-	    var action = function(graph) {
-	        var way = graph.entity(wayID);
+	      if (touchesOtherLSE) {
+	        // check for segments that just intersect on opposing endpoints
+	        if (touchesThisRSE) {
+	          if (trp.x === olp.x && trp.y === olp.y) return null;
+	        } // t-intersection on left endpoint
 
-	        graph.parentRelations(way).forEach(function(parent) {
-	            parent = parent.removeMembersWithID(wayID);
-	            graph = graph.replace(parent);
 
-	            if (parent.isDegenerate()) {
-	                graph = actionDeleteRelation(parent.id)(graph);
-	            }
-	        });
+	        return olp;
+	      } // trivial intersection on right endpoints
 
-	        (new Set(way.nodes)).forEach(function(nodeID) {
-	            graph = graph.replace(way.removeNode(nodeID));
 
-	            var node = graph.entity(nodeID);
-	            if (canDeleteNode(node, graph)) {
-	                graph = graph.remove(node);
-	            }
-	        });
+	      if (touchesThisRSE && touchesOtherRSE) return null; // t-intersections on just one right endpoint
 
-	        return graph.remove(way);
-	    };
+	      if (touchesThisRSE) return trp;
+	      if (touchesOtherRSE) return orp; // None of our endpoints intersect. Look for a general intersection between
+	      // infinite lines laid over the segments
 
+	      var pt = intersection(tlp, this.vector(), olp, other.vector()); // are the segments parrallel? Note that if they were colinear with overlap,
+	      // they would have an endpoint intersection and that case was already handled above
 
-	    return action;
-	}
+	      if (pt === null) return null; // is the intersection found between the lines not on the segments?
 
-	function actionDeleteMultiple(ids) {
-	    var actions = {
-	        way: actionDeleteWay,
-	        node: actionDeleteNode,
-	        relation: actionDeleteRelation
-	    };
+	      if (!isInBbox(bboxOverlap, pt)) return null; // round the the computed point if needed
 
+	      return rounder.round(pt.x, pt.y);
+	    }
+	    /**
+	     * Split the given segment into multiple segments on the given points.
+	     *  * Each existing segment will retain its leftSE and a new rightSE will be
+	     *    generated for it.
+	     *  * A new segment will be generated which will adopt the original segment's
+	     *    rightSE, and a new leftSE will be generated for it.
+	     *  * If there are more than two points given to split on, new segments
+	     *    in the middle will be generated with new leftSE and rightSE's.
+	     *  * An array of the newly generated SweepEvents will be returned.
+	     *
+	     * Warning: input array of points is modified
+	     */
 
-	    var action = function(graph) {
-	        ids.forEach(function(id) {
-	            if (graph.hasEntity(id)) { // It may have been deleted aready.
-	                graph = actions[graph.entity(id).type](id)(graph);
-	            }
-	        });
+	  }, {
+	    key: "split",
+	    value: function split(point) {
+	      var newEvents = [];
+	      var alreadyLinked = point.events !== undefined;
+	      var newLeftSE = new SweepEvent(point, true);
+	      var newRightSE = new SweepEvent(point, false);
+	      var oldRightSE = this.rightSE;
+	      this.replaceRightSE(newRightSE);
+	      newEvents.push(newRightSE);
+	      newEvents.push(newLeftSE);
+	      var newSeg = new Segment(newLeftSE, oldRightSE, this.rings.slice(), this.windings.slice()); // when splitting a nearly vertical downward-facing segment,
+	      // sometimes one of the resulting new segments is vertical, in which
+	      // case its left and right events may need to be swapped
+
+	      if (SweepEvent.comparePoints(newSeg.leftSE.point, newSeg.rightSE.point) > 0) {
+	        newSeg.swapEvents();
+	      }
 
-	        return graph;
-	    };
+	      if (SweepEvent.comparePoints(this.leftSE.point, this.rightSE.point) > 0) {
+	        this.swapEvents();
+	      } // in the point we just used to create new sweep events with was already
+	      // linked to other events, we need to check if either of the affected
+	      // segments should be consumed
 
 
-	    return action;
-	}
+	      if (alreadyLinked) {
+	        newLeftSE.checkForConsuming();
+	        newRightSE.checkForConsuming();
+	      }
 
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/DeleteRelationAction.as
-	function actionDeleteRelation(relationID, allowUntaggedMembers) {
+	      return newEvents;
+	    }
+	    /* Swap which event is left and right */
 
-	    function canDeleteEntity(entity, graph) {
-	        return !graph.parentWays(entity).length &&
-	            !graph.parentRelations(entity).length &&
-	            (!entity.hasInterestingTags() && !allowUntaggedMembers);
+	  }, {
+	    key: "swapEvents",
+	    value: function swapEvents() {
+	      var tmpEvt = this.rightSE;
+	      this.rightSE = this.leftSE;
+	      this.leftSE = tmpEvt;
+	      this.leftSE.isLeft = true;
+	      this.rightSE.isLeft = false;
+
+	      for (var i = 0, iMax = this.windings.length; i < iMax; i++) {
+	        this.windings[i] *= -1;
+	      }
 	    }
+	    /* Consume another segment. We take their rings under our wing
+	     * and mark them as consumed. Use for perfectly overlapping segments */
 
+	  }, {
+	    key: "consume",
+	    value: function consume(other) {
+	      var consumer = this;
+	      var consumee = other;
 
-	    var action = function(graph) {
-	        var relation = graph.entity(relationID);
+	      while (consumer.consumedBy) {
+	        consumer = consumer.consumedBy;
+	      }
 
-	        graph.parentRelations(relation)
-	            .forEach(function(parent) {
-	                parent = parent.removeMembersWithID(relationID);
-	                graph = graph.replace(parent);
+	      while (consumee.consumedBy) {
+	        consumee = consumee.consumedBy;
+	      }
 
-	                if (parent.isDegenerate()) {
-	                    graph = actionDeleteRelation(parent.id)(graph);
-	                }
-	            });
+	      var cmp = Segment.compare(consumer, consumee);
+	      if (cmp === 0) return; // already consumed
+	      // the winner of the consumption is the earlier segment
+	      // according to sweep line ordering
 
-	        var memberIDs = utilArrayUniq(relation.members.map(function(m) { return m.id; }));
-	        memberIDs.forEach(function(memberID) {
-	            graph = graph.replace(relation.removeMembersWithID(memberID));
+	      if (cmp > 0) {
+	        var tmp = consumer;
+	        consumer = consumee;
+	        consumee = tmp;
+	      } // make sure a segment doesn't consume it's prev
 
-	            var entity = graph.entity(memberID);
-	            if (canDeleteEntity(entity, graph)) {
-	                graph = actionDeleteMultiple([memberID])(graph);
-	            }
-	        });
 
-	        return graph.remove(relation);
-	    };
+	      if (consumer.prev === consumee) {
+	        var _tmp = consumer;
+	        consumer = consumee;
+	        consumee = _tmp;
+	      }
 
+	      for (var i = 0, iMax = consumee.rings.length; i < iMax; i++) {
+	        var ring = consumee.rings[i];
+	        var winding = consumee.windings[i];
+	        var index = consumer.rings.indexOf(ring);
 
-	    return action;
-	}
+	        if (index === -1) {
+	          consumer.rings.push(ring);
+	          consumer.windings.push(winding);
+	        } else consumer.windings[index] += winding;
+	      }
 
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/DeleteNodeAction.as
-	function actionDeleteNode(nodeId) {
-	    var action = function(graph) {
-	        var node = graph.entity(nodeId);
+	      consumee.rings = null;
+	      consumee.windings = null;
+	      consumee.consumedBy = consumer; // mark sweep events consumed as to maintain ordering in sweep event queue
 
-	        graph.parentWays(node)
-	            .forEach(function(parent) {
-	                parent = parent.removeNode(nodeId);
-	                graph = graph.replace(parent);
+	      consumee.leftSE.consumedBy = consumer.leftSE;
+	      consumee.rightSE.consumedBy = consumer.rightSE;
+	    }
+	    /* The first segment previous segment chain that is in the result */
 
-	                if (parent.isDegenerate()) {
-	                    graph = actionDeleteWay(parent.id)(graph);
-	                }
-	            });
+	  }, {
+	    key: "prevInResult",
+	    value: function prevInResult() {
+	      if (this._prevInResult !== undefined) return this._prevInResult;
+	      if (!this.prev) this._prevInResult = null;else if (this.prev.isInResult()) this._prevInResult = this.prev;else this._prevInResult = this.prev.prevInResult();
+	      return this._prevInResult;
+	    }
+	  }, {
+	    key: "beforeState",
+	    value: function beforeState() {
+	      if (this._beforeState !== undefined) return this._beforeState;
+	      if (!this.prev) this._beforeState = {
+	        rings: [],
+	        windings: [],
+	        multiPolys: []
+	      };else {
+	        var seg = this.prev.consumedBy || this.prev;
+	        this._beforeState = seg.afterState();
+	      }
+	      return this._beforeState;
+	    }
+	  }, {
+	    key: "afterState",
+	    value: function afterState() {
+	      if (this._afterState !== undefined) return this._afterState;
+	      var beforeState = this.beforeState();
+	      this._afterState = {
+	        rings: beforeState.rings.slice(0),
+	        windings: beforeState.windings.slice(0),
+	        multiPolys: []
+	      };
+	      var ringsAfter = this._afterState.rings;
+	      var windingsAfter = this._afterState.windings;
+	      var mpsAfter = this._afterState.multiPolys; // calculate ringsAfter, windingsAfter
 
-	        graph.parentRelations(node)
-	            .forEach(function(parent) {
-	                parent = parent.removeMembersWithID(nodeId);
-	                graph = graph.replace(parent);
+	      for (var i = 0, iMax = this.rings.length; i < iMax; i++) {
+	        var ring = this.rings[i];
+	        var winding = this.windings[i];
+	        var index = ringsAfter.indexOf(ring);
 
-	                if (parent.isDegenerate()) {
-	                    graph = actionDeleteRelation(parent.id)(graph);
-	                }
-	            });
+	        if (index === -1) {
+	          ringsAfter.push(ring);
+	          windingsAfter.push(winding);
+	        } else windingsAfter[index] += winding;
+	      } // calcualte polysAfter
 
-	        return graph.remove(node);
-	    };
 
+	      var polysAfter = [];
+	      var polysExclude = [];
 
-	    return action;
-	}
+	      for (var _i = 0, _iMax = ringsAfter.length; _i < _iMax; _i++) {
+	        if (windingsAfter[_i] === 0) continue; // non-zero rule
 
-	// Connect the ways at the given nodes.
-	//
-	// First choose a node to be the survivor, with preference given
-	// to an existing (not new) node.
-	//
-	// Tags and relation memberships of of non-surviving nodes are merged
-	// to the survivor.
-	//
-	// This is the inverse of `iD.actionDisconnect`.
-	//
-	// Reference:
-	//   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeNodesAction.as
-	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/MergeNodesAction.java
-	//
-	function actionConnect(nodeIDs) {
-	    var action = function(graph) {
-	        var survivor;
-	        var node;
-	        var parents;
-	        var i, j;
-
-	        // Choose a survivor node, prefer an existing (not new) node - #4974
-	        for (i = 0; i < nodeIDs.length; i++) {
-	            survivor = graph.entity(nodeIDs[i]);
-	            if (survivor.version) { break; }  // found one
-	        }
-
-	        // Replace all non-surviving nodes with the survivor and merge tags.
-	        for (i = 0; i < nodeIDs.length; i++) {
-	            node = graph.entity(nodeIDs[i]);
-	            if (node.id === survivor.id) { continue; }
-
-	            parents = graph.parentWays(node);
-	            for (j = 0; j < parents.length; j++) {
-	                graph = graph.replace(parents[j].replaceNode(node.id, survivor.id));
-	            }
+	        var _ring = ringsAfter[_i];
+	        var poly = _ring.poly;
+	        if (polysExclude.indexOf(poly) !== -1) continue;
+	        if (_ring.isExterior) polysAfter.push(poly);else {
+	          if (polysExclude.indexOf(poly) === -1) polysExclude.push(poly);
 
-	            parents = graph.parentRelations(node);
-	            for (j = 0; j < parents.length; j++) {
-	                graph = graph.replace(parents[j].replaceMember(node, survivor));
-	            }
+	          var _index = polysAfter.indexOf(_ring.poly);
 
-	            survivor = survivor.mergeTags(node.tags);
-	            graph = actionDeleteNode(node.id)(graph);
+	          if (_index !== -1) polysAfter.splice(_index, 1);
 	        }
+	      } // calculate multiPolysAfter
 
-	        graph = graph.replace(survivor);
-
-	        // find and delete any degenerate ways created by connecting adjacent vertices
-	        parents = graph.parentWays(survivor);
-	        for (i = 0; i < parents.length; i++) {
-	            if (parents[i].isDegenerate()) {
-	                graph = actionDeleteWay(parents[i].id)(graph);
-	            }
-	        }
 
-	        return graph;
-	    };
+	      for (var _i2 = 0, _iMax2 = polysAfter.length; _i2 < _iMax2; _i2++) {
+	        var mp = polysAfter[_i2].multiPoly;
+	        if (mpsAfter.indexOf(mp) === -1) mpsAfter.push(mp);
+	      }
 
+	      return this._afterState;
+	    }
+	    /* Is this segment part of the final result? */
 
-	    action.disabled = function(graph) {
-	        var seen = {};
-	        var restrictionIDs = [];
-	        var survivor;
-	        var node, way;
-	        var relations, relation, role;
-	        var i, j, k;
+	  }, {
+	    key: "isInResult",
+	    value: function isInResult() {
+	      // if we've been consumed, we're not in the result
+	      if (this.consumedBy) return false;
+	      if (this._isInResult !== undefined) return this._isInResult;
+	      var mpsBefore = this.beforeState().multiPolys;
+	      var mpsAfter = this.afterState().multiPolys;
+
+	      switch (operation.type) {
+	        case 'union':
+	          {
+	            // UNION - included iff:
+	            //  * On one side of us there is 0 poly interiors AND
+	            //  * On the other side there is 1 or more.
+	            var noBefores = mpsBefore.length === 0;
+	            var noAfters = mpsAfter.length === 0;
+	            this._isInResult = noBefores !== noAfters;
+	            break;
+	          }
 
-	        // Choose a survivor node, prefer an existing (not new) node - #4974
-	        for (i = 0; i < nodeIDs.length; i++) {
-	            survivor = graph.entity(nodeIDs[i]);
-	            if (survivor.version) { break; }  // found one
-	        }
+	        case 'intersection':
+	          {
+	            // INTERSECTION - included iff:
+	            //  * on one side of us all multipolys are rep. with poly interiors AND
+	            //  * on the other side of us, not all multipolys are repsented
+	            //    with poly interiors
+	            var least;
+	            var most;
+
+	            if (mpsBefore.length < mpsAfter.length) {
+	              least = mpsBefore.length;
+	              most = mpsAfter.length;
+	            } else {
+	              least = mpsAfter.length;
+	              most = mpsBefore.length;
+	            }
 
-	        // 1. disable if the nodes being connected have conflicting relation roles
-	        for (i = 0; i < nodeIDs.length; i++) {
-	            node = graph.entity(nodeIDs[i]);
-	            relations = graph.parentRelations(node);
+	            this._isInResult = most === operation.numMultiPolys && least < most;
+	            break;
+	          }
 
-	            for (j = 0; j < relations.length; j++) {
-	                relation = relations[j];
-	                role = relation.memberById(node.id).role || '';
+	        case 'xor':
+	          {
+	            // XOR - included iff:
+	            //  * the difference between the number of multipolys represented
+	            //    with poly interiors on our two sides is an odd number
+	            var diff = Math.abs(mpsBefore.length - mpsAfter.length);
+	            this._isInResult = diff % 2 === 1;
+	            break;
+	          }
 
-	                // if this node is a via node in a restriction, remember for later
-	                if (relation.hasFromViaTo()) {
-	                    restrictionIDs.push(relation.id);
-	                }
+	        case 'difference':
+	          {
+	            // DIFFERENCE included iff:
+	            //  * on exactly one side, we have just the subject
+	            var isJustSubject = function isJustSubject(mps) {
+	              return mps.length === 1 && mps[0].isSubject;
+	            };
 
-	                if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
-	                    return 'relation';
-	                } else {
-	                    seen[relation.id] = role;
-	                }
-	            }
-	        }
+	            this._isInResult = isJustSubject(mpsBefore) !== isJustSubject(mpsAfter);
+	            break;
+	          }
 
-	        // gather restrictions for parent ways
-	        for (i = 0; i < nodeIDs.length; i++) {
-	            node = graph.entity(nodeIDs[i]);
+	        default:
+	          throw new Error("Unrecognized operation type found ".concat(operation.type));
+	      }
 
-	            var parents = graph.parentWays(node);
-	            for (j = 0; j < parents.length; j++) {
-	                var parent = parents[j];
-	                relations = graph.parentRelations(parent);
+	      return this._isInResult;
+	    }
+	  }], [{
+	    key: "fromRing",
+	    value: function fromRing(pt1, pt2, ring) {
+	      var leftPt, rightPt, winding; // ordering the two points according to sweep line ordering
 
-	                for (k = 0; k < relations.length; k++) {
-	                    relation = relations[k];
-	                    if (relation.hasFromViaTo()) {
-	                        restrictionIDs.push(relation.id);
-	                    }
-	                }
-	            }
-	        }
+	      var cmpPts = SweepEvent.comparePoints(pt1, pt2);
 
+	      if (cmpPts < 0) {
+	        leftPt = pt1;
+	        rightPt = pt2;
+	        winding = 1;
+	      } else if (cmpPts > 0) {
+	        leftPt = pt2;
+	        rightPt = pt1;
+	        winding = -1;
+	      } else throw new Error("Tried to create degenerate segment at [".concat(pt1.x, ", ").concat(pt1.y, "]"));
 
-	        // test restrictions
-	        restrictionIDs = utilArrayUniq(restrictionIDs);
-	        for (i = 0; i < restrictionIDs.length; i++) {
-	            relation = graph.entity(restrictionIDs[i]);
-	            if (!relation.isComplete(graph)) { continue; }
+	      var leftSE = new SweepEvent(leftPt, true);
+	      var rightSE = new SweepEvent(rightPt, false);
+	      return new Segment(leftSE, rightSE, [ring], [winding]);
+	    }
+	  }]);
 
-	            var memberWays = relation.members
-	                .filter(function(m) { return m.type === 'way'; })
-	                .map(function(m) { return graph.entity(m.id); });
+	  return Segment;
+	}();
 
-	            memberWays = utilArrayUniq(memberWays);
-	            var f = relation.memberByRole('from');
-	            var t = relation.memberByRole('to');
-	            var isUturn = (f.id === t.id);
+	var RingIn = /*#__PURE__*/function () {
+	  function RingIn(geomRing, poly, isExterior) {
+	    _classCallCheck(this, RingIn);
 
-	            // 2a. disable if connection would damage a restriction
-	            // (a key node is a node at the junction of ways)
-	            var nodes = { from: [], via: [], to: [], keyfrom: [], keyto: [] };
-	            for (j = 0; j < relation.members.length; j++) {
-	                collectNodes(relation.members[j], nodes);
-	            }
+	    if (!Array.isArray(geomRing) || geomRing.length === 0) {
+	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	    }
 
-	            nodes.keyfrom = utilArrayUniq(nodes.keyfrom.filter(hasDuplicates));
-	            nodes.keyto = utilArrayUniq(nodes.keyto.filter(hasDuplicates));
-
-	            var filter = keyNodeFilter(nodes.keyfrom, nodes.keyto);
-	            nodes.from = nodes.from.filter(filter);
-	            nodes.via = nodes.via.filter(filter);
-	            nodes.to = nodes.to.filter(filter);
-
-	            var connectFrom = false;
-	            var connectVia = false;
-	            var connectTo = false;
-	            var connectKeyFrom = false;
-	            var connectKeyTo = false;
-
-	            for (j = 0; j < nodeIDs.length; j++) {
-	                var n = nodeIDs[j];
-	                if (nodes.from.indexOf(n) !== -1)    { connectFrom = true; }
-	                if (nodes.via.indexOf(n) !== -1)     { connectVia = true; }
-	                if (nodes.to.indexOf(n) !== -1)      { connectTo = true; }
-	                if (nodes.keyfrom.indexOf(n) !== -1) { connectKeyFrom = true; }
-	                if (nodes.keyto.indexOf(n) !== -1)   { connectKeyTo = true; }
-	            }
-	            if (connectFrom && connectTo && !isUturn) { return 'restriction'; }
-	            if (connectFrom && connectVia) { return 'restriction'; }
-	            if (connectTo   && connectVia) { return 'restriction'; }
-
-	            // connecting to a key node -
-	            // if both nodes are on a member way (i.e. part of the turn restriction),
-	            // the connecting node must be adjacent to the key node.
-	            if (connectKeyFrom || connectKeyTo) {
-	                if (nodeIDs.length !== 2) { return 'restriction'; }
-
-	                var n0 = null;
-	                var n1 = null;
-	                for (j = 0; j < memberWays.length; j++) {
-	                    way = memberWays[j];
-	                    if (way.contains(nodeIDs[0])) { n0 = nodeIDs[0]; }
-	                    if (way.contains(nodeIDs[1])) { n1 = nodeIDs[1]; }
-	                }
+	    this.poly = poly;
+	    this.isExterior = isExterior;
+	    this.segments = [];
 
-	                if (n0 && n1) {    // both nodes are part of the restriction
-	                    var ok = false;
-	                    for (j = 0; j < memberWays.length; j++) {
-	                        way = memberWays[j];
-	                        if (way.areAdjacent(n0, n1)) {
-	                            ok = true;
-	                            break;
-	                        }
-	                    }
-	                    if (!ok) {
-	                        return 'restriction';
-	                    }
-	                }
-	            }
+	    if (typeof geomRing[0][0] !== 'number' || typeof geomRing[0][1] !== 'number') {
+	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	    }
 
-	            // 2b. disable if nodes being connected will destroy a member way in a restriction
-	            // (to test, make a copy and try actually connecting the nodes)
-	            for (j = 0; j < memberWays.length; j++) {
-	                way = memberWays[j].update({});   // make copy
-	                for (k = 0; k < nodeIDs.length; k++) {
-	                    if (nodeIDs[k] === survivor.id) { continue; }
+	    var firstPoint = rounder.round(geomRing[0][0], geomRing[0][1]);
+	    this.bbox = {
+	      ll: {
+	        x: firstPoint.x,
+	        y: firstPoint.y
+	      },
+	      ur: {
+	        x: firstPoint.x,
+	        y: firstPoint.y
+	      }
+	    };
+	    var prevPoint = firstPoint;
 
-	                    if (way.areAdjacent(nodeIDs[k], survivor.id)) {
-	                        way = way.removeNode(nodeIDs[k]);
-	                    } else {
-	                        way = way.replaceNode(nodeIDs[k], survivor.id);
-	                    }
-	                }
-	                if (way.isDegenerate()) {
-	                    return 'restriction';
-	                }
-	            }
-	        }
+	    for (var i = 1, iMax = geomRing.length; i < iMax; i++) {
+	      if (typeof geomRing[i][0] !== 'number' || typeof geomRing[i][1] !== 'number') {
+	        throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	      }
 
-	        return false;
+	      var point = rounder.round(geomRing[i][0], geomRing[i][1]); // skip repeated points
 
+	      if (point.x === prevPoint.x && point.y === prevPoint.y) continue;
+	      this.segments.push(Segment.fromRing(prevPoint, point, this));
+	      if (point.x < this.bbox.ll.x) this.bbox.ll.x = point.x;
+	      if (point.y < this.bbox.ll.y) this.bbox.ll.y = point.y;
+	      if (point.x > this.bbox.ur.x) this.bbox.ur.x = point.x;
+	      if (point.y > this.bbox.ur.y) this.bbox.ur.y = point.y;
+	      prevPoint = point;
+	    } // add segment from last to first if last is not the same as first
 
-	        // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction
-	        function hasDuplicates(n, i, arr) {
-	            return arr.indexOf(n) !== arr.lastIndexOf(n);
-	        }
 
-	        function keyNodeFilter(froms, tos) {
-	            return function(n) {
-	                return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
-	            };
-	        }
+	    if (firstPoint.x !== prevPoint.x || firstPoint.y !== prevPoint.y) {
+	      this.segments.push(Segment.fromRing(prevPoint, firstPoint, this));
+	    }
+	  }
 
-	        function collectNodes(member, collection) {
-	            var entity = graph.hasEntity(member.id);
-	            if (!entity) { return; }
+	  _createClass(RingIn, [{
+	    key: "getSweepEvents",
+	    value: function getSweepEvents() {
+	      var sweepEvents = [];
 
-	            var role = member.role || '';
-	            if (!collection[role]) {
-	                collection[role] = [];
-	            }
+	      for (var i = 0, iMax = this.segments.length; i < iMax; i++) {
+	        var segment = this.segments[i];
+	        sweepEvents.push(segment.leftSE);
+	        sweepEvents.push(segment.rightSE);
+	      }
 
-	            if (member.type === 'node') {
-	                collection[role].push(member.id);
-	                if (role === 'via') {
-	                    collection.keyfrom.push(member.id);
-	                    collection.keyto.push(member.id);
-	                }
+	      return sweepEvents;
+	    }
+	  }]);
 
-	            } else if (member.type === 'way') {
-	                collection[role].push.apply(collection[role], entity.nodes);
-	                if (role === 'from' || role === 'via') {
-	                    collection.keyfrom.push(entity.first());
-	                    collection.keyfrom.push(entity.last());
-	                }
-	                if (role === 'to' || role === 'via') {
-	                    collection.keyto.push(entity.first());
-	                    collection.keyto.push(entity.last());
-	                }
-	            }
-	        }
-	    };
+	  return RingIn;
+	}();
 
+	var PolyIn = /*#__PURE__*/function () {
+	  function PolyIn(geomPoly, multiPoly) {
+	    _classCallCheck(this, PolyIn);
 
-	    return action;
-	}
+	    if (!Array.isArray(geomPoly)) {
+	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	    }
 
-	function actionCopyEntities(ids, fromGraph) {
-	    var _copies = {};
+	    this.exteriorRing = new RingIn(geomPoly[0], this, true); // copy by value
 
+	    this.bbox = {
+	      ll: {
+	        x: this.exteriorRing.bbox.ll.x,
+	        y: this.exteriorRing.bbox.ll.y
+	      },
+	      ur: {
+	        x: this.exteriorRing.bbox.ur.x,
+	        y: this.exteriorRing.bbox.ur.y
+	      }
+	    };
+	    this.interiorRings = [];
 
-	    var action = function(graph) {
-	        ids.forEach(function(id) {
-	            fromGraph.entity(id).copy(fromGraph, _copies);
-	        });
+	    for (var i = 1, iMax = geomPoly.length; i < iMax; i++) {
+	      var ring = new RingIn(geomPoly[i], this, false);
+	      if (ring.bbox.ll.x < this.bbox.ll.x) this.bbox.ll.x = ring.bbox.ll.x;
+	      if (ring.bbox.ll.y < this.bbox.ll.y) this.bbox.ll.y = ring.bbox.ll.y;
+	      if (ring.bbox.ur.x > this.bbox.ur.x) this.bbox.ur.x = ring.bbox.ur.x;
+	      if (ring.bbox.ur.y > this.bbox.ur.y) this.bbox.ur.y = ring.bbox.ur.y;
+	      this.interiorRings.push(ring);
+	    }
 
-	        for (var id in _copies) {
-	            graph = graph.replace(_copies[id]);
-	        }
+	    this.multiPoly = multiPoly;
+	  }
 
-	        return graph;
-	    };
+	  _createClass(PolyIn, [{
+	    key: "getSweepEvents",
+	    value: function getSweepEvents() {
+	      var sweepEvents = this.exteriorRing.getSweepEvents();
 
+	      for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
+	        var ringSweepEvents = this.interiorRings[i].getSweepEvents();
 
-	    action.copies = function() {
-	        return _copies;
-	    };
+	        for (var j = 0, jMax = ringSweepEvents.length; j < jMax; j++) {
+	          sweepEvents.push(ringSweepEvents[j]);
+	        }
+	      }
 
+	      return sweepEvents;
+	    }
+	  }]);
 
-	    return action;
-	}
+	  return PolyIn;
+	}();
 
-	function actionDeleteMember(relationId, memberIndex) {
-	    return function(graph) {
-	        var relation = graph.entity(relationId)
-	            .removeMember(memberIndex);
+	var MultiPolyIn = /*#__PURE__*/function () {
+	  function MultiPolyIn(geom, isSubject) {
+	    _classCallCheck(this, MultiPolyIn);
 
-	        graph = graph.replace(relation);
+	    if (!Array.isArray(geom)) {
+	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	    }
 
-	        if (relation.isDegenerate())
-	            { graph = actionDeleteRelation(relation.id)(graph); }
+	    try {
+	      // if the input looks like a polygon, convert it to a multipolygon
+	      if (typeof geom[0][0][0] === 'number') geom = [geom];
+	    } catch (ex) {// The input is either malformed or has empty arrays.
+	      // In either case, it will be handled later on.
+	    }
 
-	        return graph;
+	    this.polys = [];
+	    this.bbox = {
+	      ll: {
+	        x: Number.POSITIVE_INFINITY,
+	        y: Number.POSITIVE_INFINITY
+	      },
+	      ur: {
+	        x: Number.NEGATIVE_INFINITY,
+	        y: Number.NEGATIVE_INFINITY
+	      }
 	    };
-	}
 
-	function actionDiscardTags(difference, discardTags) {
-	  discardTags = discardTags || {};
+	    for (var i = 0, iMax = geom.length; i < iMax; i++) {
+	      var poly = new PolyIn(geom[i], this);
+	      if (poly.bbox.ll.x < this.bbox.ll.x) this.bbox.ll.x = poly.bbox.ll.x;
+	      if (poly.bbox.ll.y < this.bbox.ll.y) this.bbox.ll.y = poly.bbox.ll.y;
+	      if (poly.bbox.ur.x > this.bbox.ur.x) this.bbox.ur.x = poly.bbox.ur.x;
+	      if (poly.bbox.ur.y > this.bbox.ur.y) this.bbox.ur.y = poly.bbox.ur.y;
+	      this.polys.push(poly);
+	    }
 
-	  return function (graph) {
-	    difference.modified().forEach(checkTags);
-	    difference.created().forEach(checkTags);
-	    return graph;
+	    this.isSubject = isSubject;
+	  }
 
-	    function checkTags(entity) {
-	      var keys = Object.keys(entity.tags);
-	      var didDiscard = false;
-	      var tags = {};
+	  _createClass(MultiPolyIn, [{
+	    key: "getSweepEvents",
+	    value: function getSweepEvents() {
+	      var sweepEvents = [];
 
-	      for (var i = 0; i < keys.length; i++) {
-	        var k = keys[i];
-	        if (discardTags[k] || !entity.tags[k]) {
-	          didDiscard = true;
-	        } else {
-	          tags[k] = entity.tags[k];
+	      for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
+	        var polySweepEvents = this.polys[i].getSweepEvents();
+
+	        for (var j = 0, jMax = polySweepEvents.length; j < jMax; j++) {
+	          sweepEvents.push(polySweepEvents[j]);
 	        }
 	      }
-	      if (didDiscard) {
-	        graph = graph.replace(entity.update({ tags: tags }));
-	      }
-	    }
 
-	  };
-	}
+	      return sweepEvents;
+	    }
+	  }]);
 
-	// Disconect the ways at the given node.
-	//
-	// Optionally, disconnect only the given ways.
-	//
-	// For testing convenience, accepts an ID to assign to the (first) new node.
-	// Normally, this will be undefined and the way will automatically
-	// be assigned a new ID.
-	//
-	// This is the inverse of `iD.actionConnect`.
-	//
-	// Reference:
-	//   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/UnjoinNodeAction.as
-	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/UnGlueAction.java
-	//
-	function actionDisconnect(nodeId, newNodeId) {
-	    var wayIds;
+	  return MultiPolyIn;
+	}();
 
+	var RingOut = /*#__PURE__*/function () {
+	  _createClass(RingOut, null, [{
+	    key: "factory",
 
-	    var action = function(graph) {
-	        var node = graph.entity(nodeId);
-	        var connections = action.connections(graph);
+	    /* Given the segments from the sweep line pass, compute & return a series
+	     * of closed rings from all the segments marked to be part of the result */
+	    value: function factory(allSegments) {
+	      var ringsOut = [];
 
-	        connections.forEach(function(connection) {
-	            var way = graph.entity(connection.wayID);
-	            var newNode = osmNode({id: newNodeId, loc: node.loc, tags: node.tags});
+	      for (var i = 0, iMax = allSegments.length; i < iMax; i++) {
+	        var segment = allSegments[i];
+	        if (!segment.isInResult() || segment.ringOut) continue;
+	        var prevEvent = null;
+	        var event = segment.leftSE;
+	        var nextEvent = segment.rightSE;
+	        var events = [event];
+	        var startingPoint = event.point;
+	        var intersectionLEs = [];
+	        /* Walk the chain of linked events to form a closed ring */
 
-	            graph = graph.replace(newNode);
-	            if (connection.index === 0 && way.isArea()) {
-	                // replace shared node with shared node..
-	                graph = graph.replace(way.replaceNode(way.nodes[0], newNode.id));
-	            } else if (way.isClosed() && connection.index === way.nodes.length - 1) {
-	                // replace closing node with new new node..
-	                graph = graph.replace(way.unclose().addNode(newNode.id));
-	            } else {
-	                // replace shared node with multiple new nodes..
-	                graph = graph.replace(way.updateNode(newNode.id, connection.index));
-	            }
-	        });
+	        while (true) {
+	          prevEvent = event;
+	          event = nextEvent;
+	          events.push(event);
+	          /* Is the ring complete? */
 
-	        return graph;
-	    };
+	          if (event.point === startingPoint) break;
 
+	          while (true) {
+	            var availableLEs = event.getAvailableLinkedEvents();
+	            /* Did we hit a dead end? This shouldn't happen. Indicates some earlier
+	             * part of the algorithm malfunctioned... please file a bug report. */
 
-	    action.connections = function(graph) {
-	        var candidates = [];
-	        var keeping = false;
-	        var parentWays = graph.parentWays(graph.entity(nodeId));
-	        var way, waynode;
-	        for (var i = 0; i < parentWays.length; i++) {
-	            way = parentWays[i];
-	            if (wayIds && wayIds.indexOf(way.id) === -1) {
-	                keeping = true;
-	                continue;
-	            }
-	            if (way.isArea() && (way.nodes[0] === nodeId)) {
-	                candidates.push({ wayID: way.id, index: 0 });
-	            } else {
-	                for (var j = 0; j < way.nodes.length; j++) {
-	                    waynode = way.nodes[j];
-	                    if (waynode === nodeId) {
-	                        if (way.isClosed() &&
-	                            parentWays.length > 1 &&
-	                            wayIds &&
-	                            wayIds.indexOf(way.id) !== -1 &&
-	                            j === way.nodes.length - 1) {
-	                            continue;
-	                        }
-	                        candidates.push({ wayID: way.id, index: j });
-	                    }
-	                }
+	            if (availableLEs.length === 0) {
+	              var firstPt = events[0].point;
+	              var lastPt = events[events.length - 1].point;
+	              throw new Error("Unable to complete output ring starting at [".concat(firstPt.x, ",") + " ".concat(firstPt.y, "]. Last matching segment found ends at") + " [".concat(lastPt.x, ", ").concat(lastPt.y, "]."));
 	            }
-	        }
-
-	        return keeping ? candidates : candidates.slice(1);
-	    };
+	            /* Only one way to go, so cotinue on the path */
 
 
-	    action.disabled = function(graph) {
-	        var connections = action.connections(graph);
-	        if (connections.length === 0)
-	            { return 'not_connected'; }
-
-	        var parentWays = graph.parentWays(graph.entity(nodeId));
-	        var seenRelationIds = {};
-	        var sharedRelation;
-
-	        parentWays.forEach(function(way) {
-	            var relations = graph.parentRelations(way);
-	            relations.forEach(function(relation) {
-	                if (relation.id in seenRelationIds) {
-	                    if (wayIds) {
-	                        if (wayIds.indexOf(way.id) !== -1 ||
-	                            wayIds.indexOf(seenRelationIds[relation.id]) !== -1) {
-	                            sharedRelation = relation;
-	                        }
-	                    } else {
-	                        sharedRelation = relation;
-	                    }
-	                } else {
-	                    seenRelationIds[relation.id] = way.id;
-	                }
-	            });
-	        });
-
-	        if (sharedRelation)
-	            { return 'relation'; }
-	    };
+	            if (availableLEs.length === 1) {
+	              nextEvent = availableLEs[0].otherSE;
+	              break;
+	            }
+	            /* We must have an intersection. Check for a completed loop */
 
 
-	    action.limitWays = function(val) {
-	        if (!arguments.length) { return wayIds; }
-	        wayIds = val;
-	        return action;
-	    };
+	            var indexLE = null;
 
+	            for (var j = 0, jMax = intersectionLEs.length; j < jMax; j++) {
+	              if (intersectionLEs[j].point === event.point) {
+	                indexLE = j;
+	                break;
+	              }
+	            }
+	            /* Found a completed loop. Cut that off and make a ring */
 
-	    return action;
-	}
 
-	function actionExtract(entityID) {
+	            if (indexLE !== null) {
+	              var intersectionLE = intersectionLEs.splice(indexLE)[0];
+	              var ringEvents = events.splice(intersectionLE.index);
+	              ringEvents.unshift(ringEvents[0].otherSE);
+	              ringsOut.push(new RingOut(ringEvents.reverse()));
+	              continue;
+	            }
+	            /* register the intersection */
 
-	    var extractedNodeID;
 
-	    var action = function(graph) {
-	        var entity = graph.entity(entityID);
+	            intersectionLEs.push({
+	              index: events.length,
+	              point: event.point
+	            });
+	            /* Choose the left-most option to continue the walk */
 
-	        if (entity.type === 'node') {
-	            return extractFromNode(entity, graph);
+	            var comparator = event.getLeftmostComparator(prevEvent);
+	            nextEvent = availableLEs.sort(comparator)[0].otherSE;
+	            break;
+	          }
 	        }
 
-	        return extractFromWayOrRelation(entity, graph);
-	    };
-
-	    function extractFromNode(node, graph) {
+	        ringsOut.push(new RingOut(events));
+	      }
 
-	        extractedNodeID = node.id;
+	      return ringsOut;
+	    }
+	  }]);
 
-	        // Create a new node to replace the one we will detach
-	        var replacement = osmNode({ loc: node.loc });
-	        graph = graph.replace(replacement);
+	  function RingOut(events) {
+	    _classCallCheck(this, RingOut);
 
-	        // Process each way in turn, updating the graph as we go
-	        graph = graph.parentWays(node)
-	            .reduce(function(accGraph, parentWay) {
-	                return accGraph.replace(parentWay.replaceNode(entityID, replacement.id));
-	            }, graph);
+	    this.events = events;
 
-	        // Process any relations too
-	        return graph.parentRelations(node)
-	            .reduce(function(accGraph, parentRel) {
-	                return accGraph.replace(parentRel.replaceMember(node, replacement));
-	            }, graph);
+	    for (var i = 0, iMax = events.length; i < iMax; i++) {
+	      events[i].segment.ringOut = this;
 	    }
 
-	    function extractFromWayOrRelation(entity, graph) {
+	    this.poly = null;
+	  }
 
-	        var fromGeometry = entity.geometry(graph);
+	  _createClass(RingOut, [{
+	    key: "getGeom",
+	    value: function getGeom() {
+	      // Remove superfluous points (ie extra points along a straight line),
+	      var prevPt = this.events[0].point;
+	      var points = [prevPt];
 
-	        var keysToCopyAndRetain = ['source', 'wheelchair'];
-	        var keysToRetain = ['area'];
-	        var buildingKeysToRetain = ['architect', 'building', 'height', 'layer'];
+	      for (var i = 1, iMax = this.events.length - 1; i < iMax; i++) {
+	        var _pt = this.events[i].point;
+	        var _nextPt = this.events[i + 1].point;
+	        if (compareVectorAngles(_pt, prevPt, _nextPt) === 0) continue;
+	        points.push(_pt);
+	        prevPt = _pt;
+	      } // ring was all (within rounding error of angle calc) colinear points
 
-	        var extractedLoc = d3_geoCentroid(entity.asGeoJSON(graph));
-	        if (!extractedLoc  || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
-	            extractedLoc = entity.extent(graph).center();
-	        }
 
-	        var isBuilding = entity.tags.building && entity.tags.building !== 'no';
+	      if (points.length === 1) return null; // check if the starting point is necessary
 
-	        var entityTags = Object.assign({}, entity.tags);  // shallow copy
-	        var pointTags = {};
-	        for (var key in entityTags) {
+	      var pt = points[0];
+	      var nextPt = points[1];
+	      if (compareVectorAngles(pt, prevPt, nextPt) === 0) points.shift();
+	      points.push(points[0]);
+	      var step = this.isExteriorRing() ? 1 : -1;
+	      var iStart = this.isExteriorRing() ? 0 : points.length - 1;
+	      var iEnd = this.isExteriorRing() ? points.length : -1;
+	      var orderedPoints = [];
 
-	            if (entity.type === 'relation' &&
-	                key === 'type') {
-	                continue;
-	            }
+	      for (var _i = iStart; _i != iEnd; _i += step) {
+	        orderedPoints.push([points[_i].x, points[_i].y]);
+	      }
 
-	            if (keysToRetain.indexOf(key) !== -1) {
-	                continue;
-	            }
+	      return orderedPoints;
+	    }
+	  }, {
+	    key: "isExteriorRing",
+	    value: function isExteriorRing() {
+	      if (this._isExteriorRing === undefined) {
+	        var enclosing = this.enclosingRing();
+	        this._isExteriorRing = enclosing ? !enclosing.isExteriorRing() : true;
+	      }
 
-	            if (isBuilding) {
-	                // don't transfer building-related tags
-	                if (buildingKeysToRetain.indexOf(key) !== -1 ||
-	                    key.match(/^building:.{1,}/) ||
-	                    key.match(/^roof:.{1,}/)) { continue; }
-	            }
+	      return this._isExteriorRing;
+	    }
+	  }, {
+	    key: "enclosingRing",
+	    value: function enclosingRing() {
+	      if (this._enclosingRing === undefined) {
+	        this._enclosingRing = this._calcEnclosingRing();
+	      }
 
-	            // copy the tag from the entity to the point
-	            pointTags[key] = entityTags[key];
+	      return this._enclosingRing;
+	    }
+	    /* Returns the ring that encloses this one, if any */
 
-	            // leave addresses and some other tags so they're on both features
-	            if (keysToCopyAndRetain.indexOf(key) !== -1 ||
-	                key.match(/^addr:.{1,}/)) {
-	                continue;
-	            }
+	  }, {
+	    key: "_calcEnclosingRing",
+	    value: function _calcEnclosingRing() {
+	      // start with the ealier sweep line event so that the prevSeg
+	      // chain doesn't lead us inside of a loop of ours
+	      var leftMostEvt = this.events[0];
+
+	      for (var i = 1, iMax = this.events.length; i < iMax; i++) {
+	        var evt = this.events[i];
+	        if (SweepEvent.compare(leftMostEvt, evt) > 0) leftMostEvt = evt;
+	      }
 
-	            // remove the tag from the entity
-	            delete entityTags[key];
-	        }
+	      var prevSeg = leftMostEvt.segment.prevInResult();
+	      var prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
 
-	        if (!isBuilding && fromGeometry === 'area') {
-	            // ensure that areas keep area geometry
-	            entityTags.area = 'yes';
-	        }
+	      while (true) {
+	        // no segment found, thus no ring can enclose us
+	        if (!prevSeg) return null; // no segments below prev segment found, thus the ring of the prev
+	        // segment must loop back around and enclose us
 
-	        var replacement = osmNode({ loc: extractedLoc, tags: pointTags });
-	        graph = graph.replace(replacement);
+	        if (!prevPrevSeg) return prevSeg.ringOut; // if the two segments are of different rings, the ring of the prev
+	        // segment must either loop around us or the ring of the prev prev
+	        // seg, which would make us and the ring of the prev peers
 
-	        extractedNodeID = replacement.id;
+	        if (prevPrevSeg.ringOut !== prevSeg.ringOut) {
+	          if (prevPrevSeg.ringOut.enclosingRing() !== prevSeg.ringOut) {
+	            return prevSeg.ringOut;
+	          } else return prevSeg.ringOut.enclosingRing();
+	        } // two segments are from the same ring, so this was a penisula
+	        // of that ring. iterate downward, keep searching
 
-	        return graph.replace(entity.update({tags: entityTags}));
+
+	        prevSeg = prevPrevSeg.prevInResult();
+	        prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
+	      }
 	    }
+	  }]);
 
-	    action.getExtractedNodeID = function() {
-	        return extractedNodeID;
-	    };
+	  return RingOut;
+	}();
 
-	    return action;
-	}
+	var PolyOut = /*#__PURE__*/function () {
+	  function PolyOut(exteriorRing) {
+	    _classCallCheck(this, PolyOut);
 
-	// Join ways at the end node they share.
-	//
-	// This is the inverse of `iD.actionSplit`.
-	//
-	// Reference:
-	//   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeWaysAction.as
-	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/CombineWayAction.java
-	//
-	function actionJoin(ids) {
+	    this.exteriorRing = exteriorRing;
+	    exteriorRing.poly = this;
+	    this.interiorRings = [];
+	  }
 
-	    function groupEntitiesByGeometry(graph) {
-	        var entities = ids.map(function(id) { return graph.entity(id); });
-	        return Object.assign(
-	            { line: [] },
-	            utilArrayGroupBy(entities, function(entity) { return entity.geometry(graph); })
-	        );
+	  _createClass(PolyOut, [{
+	    key: "addInterior",
+	    value: function addInterior(ring) {
+	      this.interiorRings.push(ring);
+	      ring.poly = this;
 	    }
+	  }, {
+	    key: "getGeom",
+	    value: function getGeom() {
+	      var geom = [this.exteriorRing.getGeom()]; // exterior ring was all (within rounding error of angle calc) colinear points
 
+	      if (geom[0] === null) return null;
 
-	    var action = function(graph) {
-	        var ways = ids.map(graph.entity, graph);
-	        var survivorID = ways[0].id;
+	      for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
+	        var ringGeom = this.interiorRings[i].getGeom(); // interior ring was all (within rounding error of angle calc) colinear points
 
-	        // if any of the ways are sided (e.g. coastline, cliff, kerb)
-	        // sort them first so they establish the overall order - #6033
-	        ways.sort(function(a, b) {
-	            var aSided = a.isSided();
-	            var bSided = b.isSided();
-	            return (aSided && !bSided) ? -1
-	                : (bSided && !aSided) ? 1
-	                : 0;
-	        });
+	        if (ringGeom === null) continue;
+	        geom.push(ringGeom);
+	      }
 
-	        // Prefer to keep an existing way.
-	        for (var i = 0; i < ways.length; i++) {
-	            if (!ways[i].isNew()) {
-	                survivorID = ways[i].id;
-	                break;
-	            }
-	        }
+	      return geom;
+	    }
+	  }]);
 
-	        var sequences = osmJoinWays(ways, graph);
-	        var joined = sequences[0];
+	  return PolyOut;
+	}();
 
-	        // We might need to reverse some of these ways before joining them.  #4688
-	        // `joined.actions` property will contain any actions we need to apply.
-	        graph = sequences.actions.reduce(function(g, action) { return action(g); }, graph);
+	var MultiPolyOut = /*#__PURE__*/function () {
+	  function MultiPolyOut(rings) {
+	    _classCallCheck(this, MultiPolyOut);
 
-	        var survivor = graph.entity(survivorID);
-	        survivor = survivor.update({ nodes: joined.nodes.map(function(n) { return n.id; }) });
-	        graph = graph.replace(survivor);
+	    this.rings = rings;
+	    this.polys = this._composePolys(rings);
+	  }
 
-	        joined.forEach(function(way) {
-	            if (way.id === survivorID) { return; }
+	  _createClass(MultiPolyOut, [{
+	    key: "getGeom",
+	    value: function getGeom() {
+	      var geom = [];
 
-	            graph.parentRelations(way).forEach(function(parent) {
-	                graph = graph.replace(parent.replaceMember(way, survivor));
-	            });
+	      for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
+	        var polyGeom = this.polys[i].getGeom(); // exterior ring was all (within rounding error of angle calc) colinear points
 
-	            survivor = survivor.mergeTags(way.tags);
+	        if (polyGeom === null) continue;
+	        geom.push(polyGeom);
+	      }
 
-	            graph = graph.replace(survivor);
-	            graph = actionDeleteWay(way.id)(graph);
-	        });
+	      return geom;
+	    }
+	  }, {
+	    key: "_composePolys",
+	    value: function _composePolys(rings) {
+	      var polys = [];
+
+	      for (var i = 0, iMax = rings.length; i < iMax; i++) {
+	        var ring = rings[i];
+	        if (ring.poly) continue;
+	        if (ring.isExteriorRing()) polys.push(new PolyOut(ring));else {
+	          var enclosingRing = ring.enclosingRing();
+	          if (!enclosingRing.poly) polys.push(new PolyOut(enclosingRing));
+	          enclosingRing.poly.addInterior(ring);
+	        }
+	      }
 
-	        // Finds if the join created a single-member multipolygon,
-	        // and if so turns it into a basic area instead
-	        function checkForSimpleMultipolygon() {
-	            if (!survivor.isClosed()) { return; }
+	      return polys;
+	    }
+	  }]);
 
-	            var multipolygons = graph.parentMultipolygons(survivor).filter(function(multipolygon) {
-	                // find multipolygons where the survivor is the only member
-	                return multipolygon.members.length === 1;
-	            });
+	  return MultiPolyOut;
+	}();
+	/**
+	 * NOTE:  We must be careful not to change any segments while
+	 *        they are in the SplayTree. AFAIK, there's no way to tell
+	 *        the tree to rebalance itself - thus before splitting
+	 *        a segment that's in the tree, we remove it from the tree,
+	 *        do the split, then re-insert it. (Even though splitting a
+	 *        segment *shouldn't* change its correct position in the
+	 *        sweep line tree, the reality is because of rounding errors,
+	 *        it sometimes does.)
+	 */
 
-	            // skip if this is the single member of multiple multipolygons
-	            if (multipolygons.length !== 1) { return; }
 
-	            var multipolygon = multipolygons[0];
+	var SweepLine = /*#__PURE__*/function () {
+	  function SweepLine(queue) {
+	    var comparator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : Segment.compare;
 
-	            for (var key in survivor.tags) {
-	                if (multipolygon.tags[key] &&
-	                    // don't collapse if tags cannot be cleanly merged
-	                    multipolygon.tags[key] !== survivor.tags[key]) { return; }
-	            }
+	    _classCallCheck(this, SweepLine);
 
-	            survivor = survivor.mergeTags(multipolygon.tags);
-	            graph = graph.replace(survivor);
-	            graph = actionDeleteRelation(multipolygon.id, true /* allow untagged members */)(graph);
+	    this.queue = queue;
+	    this.tree = new Tree(comparator);
+	    this.segments = [];
+	  }
 
-	            var tags = Object.assign({}, survivor.tags);
-	            if (survivor.geometry(graph) !== 'area') {
-	                // ensure the feature persists as an area
-	                tags.area = 'yes';
-	            }
-	            delete tags.type; // remove type=multipolygon
-	            survivor = survivor.update({ tags: tags });
-	            graph = graph.replace(survivor);
-	        }
-	        checkForSimpleMultipolygon();
+	  _createClass(SweepLine, [{
+	    key: "process",
+	    value: function process(event) {
+	      var segment = event.segment;
+	      var newEvents = []; // if we've already been consumed by another segment,
+	      // clean up our body parts and get out
 
-	        return graph;
-	    };
+	      if (event.consumedBy) {
+	        if (event.isLeft) this.queue.remove(event.otherSE);else this.tree.remove(segment);
+	        return newEvents;
+	      }
 
-	    // Returns the number of nodes the resultant way is expected to have
-	    action.resultingWayNodesLength = function(graph) {
-	        return ids.reduce(function(count, id) {
-	            return count + graph.entity(id).nodes.length;
-	        }, 0) - ids.length - 1;
-	    };
+	      var node = event.isLeft ? this.tree.insert(segment) : this.tree.find(segment);
+	      if (!node) throw new Error("Unable to find segment #".concat(segment.id, " ") + "[".concat(segment.leftSE.point.x, ", ").concat(segment.leftSE.point.y, "] -> ") + "[".concat(segment.rightSE.point.x, ", ").concat(segment.rightSE.point.y, "] ") + 'in SweepLine tree. Please submit a bug report.');
+	      var prevNode = node;
+	      var nextNode = node;
+	      var prevSeg = undefined;
+	      var nextSeg = undefined; // skip consumed segments still in tree
 
+	      while (prevSeg === undefined) {
+	        prevNode = this.tree.prev(prevNode);
+	        if (prevNode === null) prevSeg = null;else if (prevNode.key.consumedBy === undefined) prevSeg = prevNode.key;
+	      } // skip consumed segments still in tree
 
-	    action.disabled = function(graph) {
-	        var geometries = groupEntitiesByGeometry(graph);
-	        if (ids.length < 2 || ids.length !== geometries.line.length) {
-	            return 'not_eligible';
-	        }
 
-	        var joined = osmJoinWays(ids.map(graph.entity, graph), graph);
-	        if (joined.length > 1) {
-	            return 'not_adjacent';
-	        }
+	      while (nextSeg === undefined) {
+	        nextNode = this.tree.next(nextNode);
+	        if (nextNode === null) nextSeg = null;else if (nextNode.key.consumedBy === undefined) nextSeg = nextNode.key;
+	      }
 
-	        // Loop through all combinations of path-pairs
-	        // to check potential intersections between all pairs
-	        for (var i = 0; i < ids.length - 1; i++) {
-	            for (var j = i + 1; j < ids.length; j++) {
-	                var path1 = graph.childNodes(graph.entity(ids[i]))
-	                    .map(function(e) { return e.loc; });
-	                var path2 = graph.childNodes(graph.entity(ids[j]))
-	                    .map(function(e) { return e.loc; });
-	                var intersections = geoPathIntersections(path1, path2);
+	      if (event.isLeft) {
+	        // Check for intersections against the previous segment in the sweep line
+	        var prevMySplitter = null;
 
-	                // Check if intersections are just nodes lying on top of
-	                // each other/the line, as opposed to crossing it
-	                var common = utilArrayIntersection(
-	                    joined[0].nodes.map(function(n) { return n.loc.toString(); }),
-	                    intersections.map(function(n) { return n.toString(); })
-	                );
-	                if (common.length !== intersections.length) {
-	                    return 'paths_intersect';
-	                }
-	            }
-	        }
+	        if (prevSeg) {
+	          var prevInter = prevSeg.getIntersection(segment);
 
-	        var nodeIds = joined[0].nodes.map(function(n) { return n.id; }).slice(1, -1);
-	        var relation;
-	        var tags = {};
-	        var conflicting = false;
+	          if (prevInter !== null) {
+	            if (!segment.isAnEndpoint(prevInter)) prevMySplitter = prevInter;
 
-	        joined[0].forEach(function(way) {
-	            var parents = graph.parentRelations(way);
-	            parents.forEach(function(parent) {
-	                if (parent.isRestriction() && parent.members.some(function(m) { return nodeIds.indexOf(m.id) >= 0; })) {
-	                    relation = parent;
-	                }
-	            });
+	            if (!prevSeg.isAnEndpoint(prevInter)) {
+	              var newEventsFromSplit = this._splitSafely(prevSeg, prevInter);
 
-	            for (var k in way.tags) {
-	                if (!(k in tags)) {
-	                    tags[k] = way.tags[k];
-	                } else if (tags[k] && osmIsInterestingTag(k) && tags[k] !== way.tags[k]) {
-	                    conflicting = true;
-	                }
+	              for (var i = 0, iMax = newEventsFromSplit.length; i < iMax; i++) {
+	                newEvents.push(newEventsFromSplit[i]);
+	              }
 	            }
-	        });
-
-	        if (relation) {
-	            return 'restriction';
-	        }
+	          }
+	        } // Check for intersections against the next segment in the sweep line
 
-	        if (conflicting) {
-	            return 'conflicting_tags';
-	        }
-	    };
 
+	        var nextMySplitter = null;
 
-	    return action;
-	}
+	        if (nextSeg) {
+	          var nextInter = nextSeg.getIntersection(segment);
 
-	function actionMerge(ids) {
+	          if (nextInter !== null) {
+	            if (!segment.isAnEndpoint(nextInter)) nextMySplitter = nextInter;
 
-	    function groupEntitiesByGeometry(graph) {
-	        var entities = ids.map(function(id) { return graph.entity(id); });
-	        return Object.assign(
-	            { point: [], area: [], line: [], relation: [] },
-	            utilArrayGroupBy(entities, function(entity) { return entity.geometry(graph); })
-	        );
-	    }
+	            if (!nextSeg.isAnEndpoint(nextInter)) {
+	              var _newEventsFromSplit = this._splitSafely(nextSeg, nextInter);
 
+	              for (var _i = 0, _iMax = _newEventsFromSplit.length; _i < _iMax; _i++) {
+	                newEvents.push(_newEventsFromSplit[_i]);
+	              }
+	            }
+	          }
+	        } // For simplicity, even if we find more than one intersection we only
+	        // spilt on the 'earliest' (sweep-line style) of the intersections.
+	        // The other intersection will be handled in a future process().
 
-	    var action = function(graph) {
-	        var geometries = groupEntitiesByGeometry(graph);
-	        var target = geometries.area[0] || geometries.line[0];
-	        var points = geometries.point;
 
-	        points.forEach(function(point) {
-	            target = target.mergeTags(point.tags);
-	            graph = graph.replace(target);
+	        if (prevMySplitter !== null || nextMySplitter !== null) {
+	          var mySplitter = null;
+	          if (prevMySplitter === null) mySplitter = nextMySplitter;else if (nextMySplitter === null) mySplitter = prevMySplitter;else {
+	            var cmpSplitters = SweepEvent.comparePoints(prevMySplitter, nextMySplitter);
+	            mySplitter = cmpSplitters <= 0 ? prevMySplitter : nextMySplitter;
+	          } // Rounding errors can cause changes in ordering,
+	          // so remove afected segments and right sweep events before splitting
 
-	            graph.parentRelations(point).forEach(function(parent) {
-	                graph = graph.replace(parent.replaceMember(point, target));
-	            });
+	          this.queue.remove(segment.rightSE);
+	          newEvents.push(segment.rightSE);
 
-	            var nodes = utilArrayUniq(graph.childNodes(target));
-	            var removeNode = point;
+	          var _newEventsFromSplit2 = segment.split(mySplitter);
 
-	            for (var i = 0; i < nodes.length; i++) {
-	                var node = nodes[i];
-	                if (graph.parentWays(node).length > 1 ||
-	                    graph.parentRelations(node).length ||
-	                    node.hasInterestingTags()) {
-	                    continue;
-	                }
+	          for (var _i2 = 0, _iMax2 = _newEventsFromSplit2.length; _i2 < _iMax2; _i2++) {
+	            newEvents.push(_newEventsFromSplit2[_i2]);
+	          }
+	        }
 
-	                // Found an uninteresting child node on the target way.
-	                // Move orig point into its place to preserve point's history. #3683
-	                graph = graph.replace(point.update({ tags: {}, loc: node.loc }));
-	                target = target.replaceNode(node.id, point.id);
-	                graph = graph.replace(target);
-	                removeNode = node;
-	                break;
+	        if (newEvents.length > 0) {
+	          // We found some intersections, so re-do the current event to
+	          // make sure sweep line ordering is totally consistent for later
+	          // use with the segment 'prev' pointers
+	          this.tree.remove(segment);
+	          newEvents.push(event);
+	        } else {
+	          // done with left event
+	          this.segments.push(segment);
+	          segment.prev = prevSeg;
+	        }
+	      } else {
+	        // event.isRight
+	        // since we're about to be removed from the sweep line, check for
+	        // intersections between our previous and next segments
+	        if (prevSeg && nextSeg) {
+	          var inter = prevSeg.getIntersection(nextSeg);
+
+	          if (inter !== null) {
+	            if (!prevSeg.isAnEndpoint(inter)) {
+	              var _newEventsFromSplit3 = this._splitSafely(prevSeg, inter);
+
+	              for (var _i3 = 0, _iMax3 = _newEventsFromSplit3.length; _i3 < _iMax3; _i3++) {
+	                newEvents.push(_newEventsFromSplit3[_i3]);
+	              }
 	            }
 
-	            graph = graph.remove(removeNode);
-	        });
+	            if (!nextSeg.isAnEndpoint(inter)) {
+	              var _newEventsFromSplit4 = this._splitSafely(nextSeg, inter);
 
-	        if (target.tags.area === 'yes') {
-	            var tags = Object.assign({}, target.tags); // shallow copy
-	            delete tags.area;
-	            if (osmTagSuggestingArea(tags)) {
-	                // remove the `area` tag if area geometry is now implied - #3851
-	                target = target.update({ tags: tags });
-	                graph = graph.replace(target);
+	              for (var _i4 = 0, _iMax4 = _newEventsFromSplit4.length; _i4 < _iMax4; _i4++) {
+	                newEvents.push(_newEventsFromSplit4[_i4]);
+	              }
 	            }
+	          }
 	        }
 
-	        return graph;
-	    };
+	        this.tree.remove(segment);
+	      }
 
+	      return newEvents;
+	    }
+	    /* Safely split a segment that is currently in the datastructures
+	     * IE - a segment other than the one that is currently being processed. */
 
-	    action.disabled = function(graph) {
-	        var geometries = groupEntitiesByGeometry(graph);
-	        if (geometries.point.length === 0 ||
-	            (geometries.area.length + geometries.line.length) !== 1 ||
-	            geometries.relation.length !== 0) {
-	            return 'not_eligible';
-	        }
-	    };
+	  }, {
+	    key: "_splitSafely",
+	    value: function _splitSafely(seg, pt) {
+	      // Rounding errors can cause changes in ordering,
+	      // so remove afected segments and right sweep events before splitting
+	      // removeNode() doesn't work, so have re-find the seg
+	      // https://github.com/w8r/splay-tree/pull/5
+	      this.tree.remove(seg);
+	      var rightSE = seg.rightSE;
+	      this.queue.remove(rightSE);
+	      var newEvents = seg.split(pt);
+	      newEvents.push(rightSE); // splitting can trigger consumption
 
+	      if (seg.consumedBy === undefined) this.tree.insert(seg);
+	      return newEvents;
+	    }
+	  }]);
 
-	    return action;
-	}
+	  return SweepLine;
+	}();
 
-	// `actionMergeNodes` is just a combination of:
-	//
-	// 1. move all the nodes to a common location
-	// 2. `actionConnect` them
+	var POLYGON_CLIPPING_MAX_QUEUE_SIZE = typeof process !== 'undefined' && process.env.POLYGON_CLIPPING_MAX_QUEUE_SIZE || 1000000;
+	var POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS = typeof process !== 'undefined' && process.env.POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS || 1000000;
 
-	function actionMergeNodes(nodeIDs, loc) {
+	var Operation = /*#__PURE__*/function () {
+	  function Operation() {
+	    _classCallCheck(this, Operation);
+	  }
 
-	    // If there is a single "interesting" node, use that as the location.
-	    // Otherwise return the average location of all the nodes.
-	    function chooseLoc(graph) {
-	        if (!nodeIDs.length) { return null; }
-	        var sum = [0,0];
-	        var interestingCount = 0;
-	        var interestingLoc;
-
-	        for (var i = 0; i < nodeIDs.length; i++) {
-	            var node = graph.entity(nodeIDs[i]);
-	            if (node.hasInterestingTags()) {
-	                interestingLoc = (++interestingCount === 1) ? node.loc : null;
-	            }
-	            sum = geoVecAdd(sum, node.loc);
-	        }
+	  _createClass(Operation, [{
+	    key: "run",
+	    value: function run(type, geom, moreGeoms) {
+	      operation.type = type;
+	      rounder.reset();
+	      /* Convert inputs to MultiPoly objects */
 
-	        return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
-	    }
+	      var multipolys = [new MultiPolyIn(geom, true)];
 
+	      for (var i = 0, iMax = moreGeoms.length; i < iMax; i++) {
+	        multipolys.push(new MultiPolyIn(moreGeoms[i], false));
+	      }
 
-	    var action = function(graph) {
-	        if (nodeIDs.length < 2) { return graph; }
-	        var toLoc = loc;
-	        if (!toLoc) {
-	            toLoc = chooseLoc(graph);
-	        }
+	      operation.numMultiPolys = multipolys.length;
+	      /* BBox optimization for difference operation
+	       * If the bbox of a multipolygon that's part of the clipping doesn't
+	       * intersect the bbox of the subject at all, we can just drop that
+	       * multiploygon. */
 
-	        for (var i = 0; i < nodeIDs.length; i++) {
-	            var node = graph.entity(nodeIDs[i]);
-	            if (node.loc !== toLoc) {
-	                graph = graph.replace(node.move(toLoc));
-	            }
-	        }
+	      if (operation.type === 'difference') {
+	        // in place removal
+	        var subject = multipolys[0];
+	        var _i = 1;
 
-	        return actionConnect(nodeIDs)(graph);
-	    };
+	        while (_i < multipolys.length) {
+	          if (getBboxOverlap(multipolys[_i].bbox, subject.bbox) !== null) _i++;else multipolys.splice(_i, 1);
+	        }
+	      }
+	      /* BBox optimization for intersection operation
+	       * If we can find any pair of multipolygons whose bbox does not overlap,
+	       * then the result will be empty. */
 
 
-	    action.disabled = function(graph) {
-	        if (nodeIDs.length < 2) { return 'not_eligible'; }
+	      if (operation.type === 'intersection') {
+	        // TODO: this is O(n^2) in number of polygons. By sorting the bboxes,
+	        //       it could be optimized to O(n * ln(n))
+	        for (var _i2 = 0, _iMax = multipolys.length; _i2 < _iMax; _i2++) {
+	          var mpA = multipolys[_i2];
 
-	        for (var i = 0; i < nodeIDs.length; i++) {
-	            var entity = graph.entity(nodeIDs[i]);
-	            if (entity.type !== 'node') { return 'not_eligible'; }
+	          for (var j = _i2 + 1, jMax = multipolys.length; j < jMax; j++) {
+	            if (getBboxOverlap(mpA.bbox, multipolys[j].bbox) === null) return [];
+	          }
 	        }
+	      }
+	      /* Put segment endpoints in a priority queue */
 
-	        return actionConnect(nodeIDs).disabled(graph);
-	    };
 
-	    return action;
-	}
+	      var queue = new Tree(SweepEvent.compare);
 
-	function osmChangeset() {
-	    if (!(this instanceof osmChangeset)) {
-	        return (new osmChangeset()).initialize(arguments);
-	    } else if (arguments.length) {
-	        this.initialize(arguments);
-	    }
-	}
+	      for (var _i3 = 0, _iMax2 = multipolys.length; _i3 < _iMax2; _i3++) {
+	        var sweepEvents = multipolys[_i3].getSweepEvents();
 
+	        for (var _j = 0, _jMax = sweepEvents.length; _j < _jMax; _j++) {
+	          queue.insert(sweepEvents[_j]);
 
-	osmEntity.changeset = osmChangeset;
+	          if (queue.size > POLYGON_CLIPPING_MAX_QUEUE_SIZE) {
+	            // prevents an infinite loop, an otherwise common manifestation of bugs
+	            throw new Error('Infinite loop when putting segment endpoints in a priority queue ' + '(queue size too big). Please file a bug report.');
+	          }
+	        }
+	      }
+	      /* Pass the sweep line over those endpoints */
 
-	osmChangeset.prototype = Object.create(osmEntity.prototype);
 
-	Object.assign(osmChangeset.prototype, {
+	      var sweepLine = new SweepLine(queue);
+	      var prevQueueSize = queue.size;
+	      var node = queue.pop();
 
-	    type: 'changeset',
+	      while (node) {
+	        var evt = node.key;
 
+	        if (queue.size === prevQueueSize) {
+	          // prevents an infinite loop, an otherwise common manifestation of bugs
+	          var seg = evt.segment;
+	          throw new Error("Unable to pop() ".concat(evt.isLeft ? 'left' : 'right', " SweepEvent ") + "[".concat(evt.point.x, ", ").concat(evt.point.y, "] from segment #").concat(seg.id, " ") + "[".concat(seg.leftSE.point.x, ", ").concat(seg.leftSE.point.y, "] -> ") + "[".concat(seg.rightSE.point.x, ", ").concat(seg.rightSE.point.y, "] from queue. ") + 'Please file a bug report.');
+	        }
 
-	    extent: function() {
-	        return new geoExtent();
-	    },
+	        if (queue.size > POLYGON_CLIPPING_MAX_QUEUE_SIZE) {
+	          // prevents an infinite loop, an otherwise common manifestation of bugs
+	          throw new Error('Infinite loop when passing sweep line over endpoints ' + '(queue size too big). Please file a bug report.');
+	        }
 
+	        if (sweepLine.segments.length > POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS) {
+	          // prevents an infinite loop, an otherwise common manifestation of bugs
+	          throw new Error('Infinite loop when passing sweep line over endpoints ' + '(too many sweep line segments). Please file a bug report.');
+	        }
 
-	    geometry: function() {
-	        return 'changeset';
-	    },
+	        var newEvents = sweepLine.process(evt);
 
+	        for (var _i4 = 0, _iMax3 = newEvents.length; _i4 < _iMax3; _i4++) {
+	          var _evt = newEvents[_i4];
+	          if (_evt.consumedBy === undefined) queue.insert(_evt);
+	        }
 
-	    asJXON: function() {
-	        return {
-	            osm: {
-	                changeset: {
-	                    tag: Object.keys(this.tags).map(function(k) {
-	                        return { '@k': k, '@v': this.tags[k] };
-	                    }, this),
-	                    '@version': 0.6,
-	                    '@generator': 'iD'
-	                }
-	            }
-	        };
-	    },
+	        prevQueueSize = queue.size;
+	        node = queue.pop();
+	      } // free some memory we don't need anymore
 
 
-	    // Generate [osmChange](http://wiki.openstreetmap.org/wiki/OsmChange)
-	    // XML. Returns a string.
-	    osmChangeJXON: function(changes) {
-	        var changeset_id = this.id;
+	      rounder.reset();
+	      /* Collect and compile segments we're keeping into a multipolygon */
 
-	        function nest(x, order) {
-	            var groups = {};
-	            for (var i = 0; i < x.length; i++) {
-	                var tagName = Object.keys(x[i])[0];
-	                if (!groups[tagName]) { groups[tagName] = []; }
-	                groups[tagName].push(x[i][tagName]);
-	            }
-	            var ordered = {};
-	            order.forEach(function(o) {
-	                if (groups[o]) { ordered[o] = groups[o]; }
-	            });
-	            return ordered;
-	        }
+	      var ringsOut = RingOut.factory(sweepLine.segments);
+	      var result = new MultiPolyOut(ringsOut);
+	      return result.getGeom();
+	    }
+	  }]);
 
+	  return Operation;
+	}(); // singleton available by import
 
-	        // sort relations in a changeset by dependencies
-	        function sort(changes) {
 
-	            // find a referenced relation in the current changeset
-	            function resolve(item) {
-	                return relations.find(function(relation) {
-	                    return item.keyAttributes.type === 'relation'
-	                        && item.keyAttributes.ref === relation['@id'];
-	                });
-	            }
+	var operation = new Operation();
 
-	            // a new item is an item that has not been already processed
-	            function isNew(item) {
-	                return !sorted[ item['@id'] ] && !processing.find(function(proc) {
-	                    return proc['@id'] === item['@id'];
-	                });
-	            }
+	var union = function union(geom) {
+	  for (var _len = arguments.length, moreGeoms = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+	    moreGeoms[_key - 1] = arguments[_key];
+	  }
 
-	            var processing = [];
-	            var sorted = {};
-	            var relations = changes.relation;
+	  return operation.run('union', geom, moreGeoms);
+	};
 
-	            if (!relations) { return changes; }
+	var intersection$1 = function intersection(geom) {
+	  for (var _len2 = arguments.length, moreGeoms = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
+	    moreGeoms[_key2 - 1] = arguments[_key2];
+	  }
 
-	            for (var i = 0; i < relations.length; i++) {
-	                var relation = relations[i];
+	  return operation.run('intersection', geom, moreGeoms);
+	};
 
-	                // skip relation if already sorted
-	                if (!sorted[relation['@id']]) {
-	                    processing.push(relation);
-	                }
+	var xor = function xor(geom) {
+	  for (var _len3 = arguments.length, moreGeoms = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
+	    moreGeoms[_key3 - 1] = arguments[_key3];
+	  }
 
-	                while (processing.length > 0) {
-	                    var next = processing[0],
-	                    deps = next.member.map(resolve).filter(Boolean).filter(isNew);
-	                    if (deps.length === 0) {
-	                        sorted[next['@id']] = next;
-	                        processing.shift();
-	                    } else {
-	                        processing = deps.concat(processing);
-	                    }
-	                }
-	            }
+	  return operation.run('xor', geom, moreGeoms);
+	};
 
-	            changes.relation = Object.values(sorted);
-	            return changes;
-	        }
+	var difference = function difference(subjectGeom) {
+	  for (var _len4 = arguments.length, clippingGeoms = new Array(_len4 > 1 ? _len4 - 1 : 0), _key4 = 1; _key4 < _len4; _key4++) {
+	    clippingGeoms[_key4 - 1] = arguments[_key4];
+	  }
 
-	        function rep(entity) {
-	            return entity.asJXON(changeset_id);
-	        }
+	  return operation.run('difference', subjectGeom, clippingGeoms);
+	};
 
-	        return {
-	            osmChange: {
-	                '@version': 0.6,
-	                '@generator': 'iD',
-	                'create': sort(nest(changes.created.map(rep), ['node', 'way', 'relation'])),
-	                'modify': nest(changes.modified.map(rep), ['node', 'way', 'relation']),
-	                'delete': Object.assign(nest(changes.deleted.map(rep), ['relation', 'way', 'node']), { '@if-unused': true })
-	            }
-	        };
-	    },
+	var index = {
+	  union: union,
+	  intersection: intersection$1,
+	  xor: xor,
+	  difference: difference
+	};
 
+	var geojsonPrecision = {exports: {}};
 
-	    asGeoJSON: function() {
-	        return {};
+	(function () {
+	  function parse(t, coordinatePrecision, extrasPrecision) {
+	    function point(p) {
+	      return p.map(function (e, index) {
+	        if (index < 2) {
+	          return 1 * e.toFixed(coordinatePrecision);
+	        } else {
+	          return 1 * e.toFixed(extrasPrecision);
+	        }
+	      });
 	    }
 
-	});
-
-	function osmNote() {
-	    if (!(this instanceof osmNote)) {
-	        return (new osmNote()).initialize(arguments);
-	    } else if (arguments.length) {
-	        this.initialize(arguments);
+	    function multi(l) {
+	      return l.map(point);
 	    }
-	}
 
+	    function poly(p) {
+	      return p.map(multi);
+	    }
 
-	osmNote.id = function() {
-	    return osmNote.id.next--;
-	};
-
-
-	osmNote.id.next = -1;
-
+	    function multiPoly(m) {
+	      return m.map(poly);
+	    }
 
-	Object.assign(osmNote.prototype, {
+	    function geometry(obj) {
+	      if (!obj) {
+	        return {};
+	      }
 
-	    type: 'note',
+	      switch (obj.type) {
+	        case "Point":
+	          obj.coordinates = point(obj.coordinates);
+	          return obj;
 
-	    initialize: function(sources) {
-	        for (var i = 0; i < sources.length; ++i) {
-	            var source = sources[i];
-	            for (var prop in source) {
-	                if (Object.prototype.hasOwnProperty.call(source, prop)) {
-	                    if (source[prop] === undefined) {
-	                        delete this[prop];
-	                    } else {
-	                        this[prop] = source[prop];
-	                    }
-	                }
-	            }
-	        }
+	        case "LineString":
+	        case "MultiPoint":
+	          obj.coordinates = multi(obj.coordinates);
+	          return obj;
 
-	        if (!this.id) {
-	            this.id = osmNote.id() + '';  // as string
-	        }
+	        case "Polygon":
+	        case "MultiLineString":
+	          obj.coordinates = poly(obj.coordinates);
+	          return obj;
 
-	        return this;
-	    },
+	        case "MultiPolygon":
+	          obj.coordinates = multiPoly(obj.coordinates);
+	          return obj;
 
-	    extent: function() {
-	        return new geoExtent(this.loc);
-	    },
+	        case "GeometryCollection":
+	          obj.geometries = obj.geometries.map(geometry);
+	          return obj;
 
-	    update: function(attrs) {
-	        return osmNote(this, attrs); // {v: 1 + (this.v || 0)}
-	    },
+	        default:
+	          return {};
+	      }
+	    }
 
-	    isNew: function() {
-	        return this.id < 0;
-	    },
+	    function feature(obj) {
+	      obj.geometry = geometry(obj.geometry);
+	      return obj;
+	    }
 
-	    move: function(loc) {
-	        return this.update({ loc: loc });
+	    function featureCollection(f) {
+	      f.features = f.features.map(feature);
+	      return f;
 	    }
 
-	});
+	    function geometryCollection(g) {
+	      g.geometries = g.geometries.map(geometry);
+	      return g;
+	    }
 
-	function osmRelation() {
-	    if (!(this instanceof osmRelation)) {
-	        return (new osmRelation()).initialize(arguments);
-	    } else if (arguments.length) {
-	        this.initialize(arguments);
+	    if (!t) {
+	      return t;
 	    }
-	}
 
+	    switch (t.type) {
+	      case "Feature":
+	        return feature(t);
 
-	osmEntity.relation = osmRelation;
+	      case "GeometryCollection":
+	        return geometryCollection(t);
 
-	osmRelation.prototype = Object.create(osmEntity.prototype);
+	      case "FeatureCollection":
+	        return featureCollection(t);
 
+	      case "Point":
+	      case "LineString":
+	      case "Polygon":
+	      case "MultiPoint":
+	      case "MultiPolygon":
+	      case "MultiLineString":
+	        return geometry(t);
 
-	osmRelation.creationOrder = function(a, b) {
-	    var aId = parseInt(osmEntity.id.toOSM(a.id), 10);
-	    var bId = parseInt(osmEntity.id.toOSM(b.id), 10);
+	      default:
+	        return t;
+	    }
+	  }
 
-	    if (aId < 0 || bId < 0) { return aId - bId; }
-	    return bId - aId;
-	};
+	  geojsonPrecision.exports = parse;
+	  geojsonPrecision.exports.parse = parse;
+	})();
 
+	var precision = geojsonPrecision.exports;
 
-	Object.assign(osmRelation.prototype, {
-	    type: 'relation',
-	    members: [],
+	var $$k = _export;
+	var fails$5 = fails$V;
+	var toObject$1 = toObject$i;
+	var toPrimitive = toPrimitive$3;
 
+	var FORCED$5 = fails$5(function () {
+	  return new Date(NaN).toJSON() !== null
+	    || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;
+	});
 
-	    copy: function(resolver, copies) {
-	        if (copies[this.id]) { return copies[this.id]; }
+	// `Date.prototype.toJSON` method
+	// https://tc39.es/ecma262/#sec-date.prototype.tojson
+	$$k({ target: 'Date', proto: true, forced: FORCED$5 }, {
+	  // eslint-disable-next-line no-unused-vars -- required for `.length`
+	  toJSON: function toJSON(key) {
+	    var O = toObject$1(this);
+	    var pv = toPrimitive(O, 'number');
+	    return typeof pv == 'number' && !isFinite(pv) ? null : O.toISOString();
+	  }
+	});
 
-	        var copy = osmEntity.prototype.copy.call(this, resolver, copies);
+	var $$j = _export;
+	var call = functionCall;
 
-	        var members = this.members.map(function(member) {
-	            return Object.assign({}, member, { id: resolver.entity(member.id).copy(resolver, copies).id });
-	        });
+	// `URL.prototype.toJSON` method
+	// https://url.spec.whatwg.org/#dom-url-tojson
+	$$j({ target: 'URL', proto: true, enumerable: true }, {
+	  toJSON: function toJSON() {
+	    return call(URL.prototype.toString, this);
+	  }
+	});
 
-	        copy = copy.update({members: members});
-	        copies[this.id] = copy;
+	function isObject$3(obj) {
+	  return _typeof(obj) === 'object' && obj !== null;
+	}
 
-	        return copy;
-	    },
+	function forEach(obj, cb) {
+	  if (Array.isArray(obj)) {
+	    obj.forEach(cb);
+	  } else if (isObject$3(obj)) {
+	    Object.keys(obj).forEach(function (key) {
+	      var val = obj[key];
+	      cb(val, key);
+	    });
+	  }
+	}
 
+	function getTreeDepth(obj) {
+	  var depth = 0;
 
-	    extent: function(resolver, memo) {
-	        return resolver.transient(this, 'extent', function() {
-	            if (memo && memo[this.id]) { return geoExtent(); }
-	            memo = memo || {};
-	            memo[this.id] = true;
+	  if (Array.isArray(obj) || isObject$3(obj)) {
+	    forEach(obj, function (val) {
+	      if (Array.isArray(val) || isObject$3(val)) {
+	        var tmpDepth = getTreeDepth(val);
 
-	            var extent = geoExtent();
-	            for (var i = 0; i < this.members.length; i++) {
-	                var member = resolver.hasEntity(this.members[i].id);
-	                if (member) {
-	                    extent._extend(member.extent(resolver, memo));
-	                }
-	            }
-	            return extent;
-	        });
-	    },
+	        if (tmpDepth > depth) {
+	          depth = tmpDepth;
+	        }
+	      }
+	    });
+	    return depth + 1;
+	  }
 
+	  return depth;
+	}
 
-	    geometry: function(graph) {
-	        return graph.transient(this, 'geometry', function() {
-	            return this.isMultipolygon() ? 'area' : 'relation';
-	        });
-	    },
+	function stringify(obj, options) {
+	  options = options || {};
+	  var indent = JSON.stringify([1], null, get(options, 'indent', 2)).slice(2, -3);
+	  var addMargin = get(options, 'margins', false);
+	  var addArrayMargin = get(options, 'arrayMargins', false);
+	  var addObjectMargin = get(options, 'objectMargins', false);
+	  var maxLength = indent === '' ? Infinity : get(options, 'maxLength', 80);
+	  var maxNesting = get(options, 'maxNesting', Infinity);
+	  return function _stringify(obj, currentIndent, reserved) {
+	    if (obj && typeof obj.toJSON === 'function') {
+	      obj = obj.toJSON();
+	    }
 
+	    var string = JSON.stringify(obj);
 
-	    isDegenerate: function() {
-	        return this.members.length === 0;
-	    },
+	    if (string === undefined) {
+	      return string;
+	    }
 
+	    var length = maxLength - currentIndent.length - reserved;
+	    var treeDepth = getTreeDepth(obj);
 
-	    // Return an array of members, each extended with an 'index' property whose value
-	    // is the member index.
-	    indexedMembers: function() {
-	        var result = new Array(this.members.length);
-	        for (var i = 0; i < this.members.length; i++) {
-	            result[i] = Object.assign({}, this.members[i], {index: i});
-	        }
-	        return result;
-	    },
+	    if (treeDepth <= maxNesting && string.length <= length) {
+	      var prettified = prettify(string, {
+	        addMargin: addMargin,
+	        addArrayMargin: addArrayMargin,
+	        addObjectMargin: addObjectMargin
+	      });
 
+	      if (prettified.length <= length) {
+	        return prettified;
+	      }
+	    }
 
-	    // Return the first member with the given role. A copy of the member object
-	    // is returned, extended with an 'index' property whose value is the member index.
-	    memberByRole: function(role) {
-	        for (var i = 0; i < this.members.length; i++) {
-	            if (this.members[i].role === role) {
-	                return Object.assign({}, this.members[i], {index: i});
-	            }
-	        }
-	    },
+	    if (isObject$3(obj)) {
+	      var nextIndent = currentIndent + indent;
+	      var items = [];
+	      var delimiters;
 
-	    // Same as memberByRole, but returns all members with the given role
-	    membersByRole: function(role) {
-	        var result = [];
-	        for (var i = 0; i < this.members.length; i++) {
-	            if (this.members[i].role === role) {
-	                result.push(Object.assign({}, this.members[i], {index: i}));
-	            }
-	        }
-	        return result;
-	    },
+	      var comma = function comma(array, index) {
+	        return index === array.length - 1 ? 0 : 1;
+	      };
 
-	    // Return the first member with the given id. A copy of the member object
-	    // is returned, extended with an 'index' property whose value is the member index.
-	    memberById: function(id) {
-	        for (var i = 0; i < this.members.length; i++) {
-	            if (this.members[i].id === id) {
-	                return Object.assign({}, this.members[i], {index: i});
-	            }
+	      if (Array.isArray(obj)) {
+	        for (var index = 0; index < obj.length; index++) {
+	          items.push(_stringify(obj[index], nextIndent, comma(obj, index)) || 'null');
 	        }
-	    },
 
+	        delimiters = '[]';
+	      } else {
+	        Object.keys(obj).forEach(function (key, index, array) {
+	          var keyPart = JSON.stringify(key) + ': ';
 
-	    // Return the first member with the given id and role. A copy of the member object
-	    // is returned, extended with an 'index' property whose value is the member index.
-	    memberByIdAndRole: function(id, role) {
-	        for (var i = 0; i < this.members.length; i++) {
-	            if (this.members[i].id === id && this.members[i].role === role) {
-	                return Object.assign({}, this.members[i], {index: i});
-	            }
-	        }
-	    },
-
+	          var value = _stringify(obj[key], nextIndent, keyPart.length + comma(array, index));
 
-	    addMember: function(member, index) {
-	        var members = this.members.slice();
-	        members.splice(index === undefined ? members.length : index, 0, member);
-	        return this.update({members: members});
-	    },
+	          if (value !== undefined) {
+	            items.push(keyPart + value);
+	          }
+	        });
+	        delimiters = '{}';
+	      }
 
+	      if (items.length > 0) {
+	        return [delimiters[0], indent + items.join(',\n' + nextIndent), delimiters[1]].join('\n' + currentIndent);
+	      }
+	    }
 
-	    updateMember: function(member, index) {
-	        var members = this.members.slice();
-	        members.splice(index, 1, Object.assign({}, members[index], member));
-	        return this.update({members: members});
-	    },
+	    return string;
+	  }(obj, '', 0);
+	} // Note: This regex matches even invalid JSON strings, but since we’re
+	// working on the output of `JSON.stringify` we know that only valid strings
+	// are present (unless the user supplied a weird `options.indent` but in
+	// that case we don’t care since the output would be invalid anyway).
 
 
-	    removeMember: function(index) {
-	        var members = this.members.slice();
-	        members.splice(index, 1);
-	        return this.update({members: members});
-	    },
+	var stringOrChar = /("(?:[^\\"]|\\.)*")|[:,\][}{]/g;
 
+	function prettify(string, options) {
+	  options = options || {};
+	  var tokens = {
+	    '{': '{',
+	    '}': '}',
+	    '[': '[',
+	    ']': ']',
+	    ',': ', ',
+	    ':': ': '
+	  };
 
-	    removeMembersWithID: function(id) {
-	        var members = this.members.filter(function(m) { return m.id !== id; });
-	        return this.update({members: members});
-	    },
+	  if (options.addMargin || options.addObjectMargin) {
+	    tokens['{'] = '{ ';
+	    tokens['}'] = ' }';
+	  }
 
-	    moveMember: function(fromIndex, toIndex) {
-	        var members = this.members.slice();
-	        members.splice(toIndex, 0, members.splice(fromIndex, 1)[0]);
-	        return this.update({members: members});
-	    },
+	  if (options.addMargin || options.addArrayMargin) {
+	    tokens['['] = '[ ';
+	    tokens[']'] = ' ]';
+	  }
 
+	  return string.replace(stringOrChar, function (match, string) {
+	    return string ? match : tokens[match];
+	  });
+	}
 
-	    // Wherever a member appears with id `needle.id`, replace it with a member
-	    // with id `replacement.id`, type `replacement.type`, and the original role,
-	    // By default, adding a duplicate member (by id and role) is prevented.
-	    // Return an updated relation.
-	    replaceMember: function(needle, replacement, keepDuplicates) {
-	        if (!this.memberById(needle.id)) { return this; }
+	function get(options, name, defaultValue) {
+	  return name in options ? options[name] : defaultValue;
+	}
 
-	        var members = [];
+	var jsonStringifyPrettyCompact = stringify;
 
-	        for (var i = 0; i < this.members.length; i++) {
-	            var member = this.members[i];
-	            if (member.id !== needle.id) {
-	                members.push(member);
-	            } else if (keepDuplicates || !this.memberByIdAndRole(replacement.id, member.role)) {
-	                members.push({ id: replacement.id, type: replacement.type, role: member.role });
-	            }
-	        }
+	var _default = /*#__PURE__*/function () {
+	  // constructor
+	  //
+	  // `fc`  Optional FeatureCollection of known features
+	  //
+	  // Optionally pass a GeoJSON FeatureCollection of known features which we can refer to later.
+	  // Each feature must have a filename-like `id`, for example: `something.geojson`
+	  //
+	  // {
+	  //   "type": "FeatureCollection"
+	  //   "features": [
+	  //     {
+	  //       "type": "Feature",
+	  //       "id": "philly_metro.geojson",
+	  //       "properties": { … },
+	  //       "geometry": { … }
+	  //     }
+	  //   ]
+	  // }
+	  function _default(fc) {
+	    var _this = this;
 
-	        return this.update({ members: members });
-	    },
+	    _classCallCheck$1(this, _default);
 
+	    // The _cache retains resolved features, so if you ask for the same thing multiple times
+	    // we don't repeat the expensive resolving/clipping operations.
+	    //
+	    // Each feature has a stable identifier that is used as the cache key.
+	    // The identifiers look like:
+	    // - for point locations, the stringified point:          e.g. '[8.67039,49.41882]'
+	    // - for geojson locations, the geojson id:               e.g. 'de-hamburg.geojson'
+	    // - for countrycoder locations, feature.id property:     e.g. 'Q2'  (countrycoder uses Wikidata identifiers)
+	    // - for aggregated locationSets, +[include]-[exclude]:   e.g '+[Q2]-[Q18,Q27611]'
+	    this._cache = {}; // When strict mode = true, throw on invalid locations or locationSets.
+	    // When strict mode = false, return `null` for invalid locations or locationSets.
 
-	    asJXON: function(changeset_id) {
-	        var r = {
-	            relation: {
-	                '@id': this.osmId(),
-	                '@version': this.version || 0,
-	                member: this.members.map(function(member) {
-	                    return {
-	                        keyAttributes: {
-	                            type: member.type,
-	                            role: member.role,
-	                            ref: osmEntity.id.toOSM(member.id)
-	                        }
-	                    };
-	                }, this),
-	                tag: Object.keys(this.tags).map(function(k) {
-	                    return { keyAttributes: { k: k, v: this.tags[k] } };
-	                }, this)
-	            }
-	        };
-	        if (changeset_id) {
-	            r.relation['@changeset'] = changeset_id;
-	        }
-	        return r;
-	    },
+	    this._strict = true; // process input FeatureCollection
 
+	    if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
+	      fc.features.forEach(function (feature) {
+	        feature.properties = feature.properties || {};
+	        var props = feature.properties; // Get `id` from either `id` or `properties`
 
-	    asGeoJSON: function(resolver) {
-	        return resolver.transient(this, 'GeoJSON', function () {
-	            if (this.isMultipolygon()) {
-	                return {
-	                    type: 'MultiPolygon',
-	                    coordinates: this.multipolygon(resolver)
-	                };
-	            } else {
-	                return {
-	                    type: 'FeatureCollection',
-	                    properties: this.tags,
-	                    features: this.members.map(function (member) {
-	                        return Object.assign({role: member.role}, resolver.entity(member.id).asGeoJSON(resolver));
-	                    })
-	                };
-	            }
-	        });
-	    },
+	        var id = feature.id || props.id;
+	        if (!id || !/^\S+\.geojson$/i.test(id)) return; // Ensure `id` exists and is lowercase
 
+	        id = id.toLowerCase();
+	        feature.id = id;
+	        props.id = id; // Ensure `area` property exists
 
-	    area: function(resolver) {
-	        return resolver.transient(this, 'area', function() {
-	            return d3_geoArea(this.asGeoJSON(resolver));
-	        });
-	    },
+	        if (!props.area) {
+	          var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²
 
+	          props.area = Number(area.toFixed(2));
+	        }
 
-	    isMultipolygon: function() {
-	        return this.tags.type === 'multipolygon';
-	    },
+	        _this._cache[id] = feature;
+	      });
+	    } // Replace CountryCoder world geometry to be a polygon covering the world.
 
 
-	    isComplete: function(resolver) {
-	        for (var i = 0; i < this.members.length; i++) {
-	            if (!resolver.hasEntity(this.members[i].id)) {
-	                return false;
-	            }
-	        }
-	        return true;
-	    },
+	    var world = _cloneDeep(feature$1('Q2'));
 
+	    world.geometry = {
+	      type: 'Polygon',
+	      coordinates: [[[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]]]
+	    };
+	    world.id = 'Q2';
+	    world.properties.id = 'Q2';
+	    world.properties.area = geojsonArea.geometry(world.geometry) / 1e6; // m² to km²
 
-	    hasFromViaTo: function() {
-	        return (
-	            this.members.some(function(m) { return m.role === 'from'; }) &&
-	            this.members.some(function(m) { return m.role === 'via'; }) &&
-	            this.members.some(function(m) { return m.role === 'to'; })
-	        );
-	    },
+	    this._cache.Q2 = world;
+	  } // validateLocation
+	  // `location`  The location to validate
+	  //
+	  // Pass a `location` value to validate
+	  //
+	  // Returns a result like:
+	  //   {
+	  //     type:     'point', 'geojson', or 'countrycoder'
+	  //     location:  the queried location
+	  //     id:        the stable identifier for the feature
+	  //   }
+	  // or `null` if the location is invalid
+	  //
 
 
-	    isRestriction: function() {
-	        return !!(this.tags.type && this.tags.type.match(/^restriction:?/));
-	    },
+	  _createClass$1(_default, [{
+	    key: "validateLocation",
+	    value: function validateLocation(location) {
+	      if (Array.isArray(location) && (location.length === 2 || location.length === 3)) {
+	        // [lon, lat] or [lon, lat, radius] point?
+	        var lon = location[0];
+	        var lat = location[1];
+	        var radius = location[2];
 
+	        if (Number.isFinite(lon) && lon >= -180 && lon <= 180 && Number.isFinite(lat) && lat >= -90 && lat <= 90 && (location.length === 2 || Number.isFinite(radius) && radius > 0)) {
+	          var id = '[' + location.toString() + ']';
+	          return {
+	            type: 'point',
+	            location: location,
+	            id: id
+	          };
+	        }
+	      } else if (typeof location === 'string' && /^\S+\.geojson$/i.test(location)) {
+	        // a .geojson filename?
+	        var _id = location.toLowerCase();
 
-	    isValidRestriction: function() {
-	        if (!this.isRestriction()) { return false; }
+	        if (this._cache[_id]) {
+	          return {
+	            type: 'geojson',
+	            location: location,
+	            id: _id
+	          };
+	        }
+	      } else if (typeof location === 'string' || typeof location === 'number') {
+	        // a country-coder value?
+	        var feature = feature$1(location);
 
-	        var froms = this.members.filter(function(m) { return m.role === 'from'; });
-	        var vias = this.members.filter(function(m) { return m.role === 'via'; });
-	        var tos = this.members.filter(function(m) { return m.role === 'to'; });
+	        if (feature) {
+	          // Use wikidata QID as the identifier, since that seems to be the one
+	          // property that everything in CountryCoder is guaranteed to have.
+	          var _id2 = feature.properties.wikidata;
+	          return {
+	            type: 'countrycoder',
+	            location: location,
+	            id: _id2
+	          };
+	        }
+	      }
 
-	        if (froms.length !== 1 && this.tags.restriction !== 'no_entry') { return false; }
-	        if (froms.some(function(m) { return m.type !== 'way'; })) { return false; }
+	      if (this._strict) {
+	        throw new Error("validateLocation:  Invalid location: \"".concat(location, "\"."));
+	      } else {
+	        return null;
+	      }
+	    } // resolveLocation
+	    // `location`  The location to resolve
+	    //
+	    // Pass a `location` value to resolve
+	    //
+	    // Returns a result like:
+	    //   {
+	    //     type:      'point', 'geojson', or 'countrycoder'
+	    //     location:  the queried location
+	    //     id:        a stable identifier for the feature
+	    //     feature:   the resolved GeoJSON feature
+	    //   }
+	    //  or `null` if the location is invalid
+	    //
 
-	        if (tos.length !== 1 && this.tags.restriction !== 'no_exit') { return false; }
-	        if (tos.some(function(m) { return m.type !== 'way'; })) { return false; }
+	  }, {
+	    key: "resolveLocation",
+	    value: function resolveLocation(location) {
+	      var valid = this.validateLocation(location);
+	      if (!valid) return null;
+	      var id = valid.id; // Return a result from cache if we can
+
+	      if (this._cache[id]) {
+	        return Object.assign(valid, {
+	          feature: this._cache[id]
+	        });
+	      } // A [lon,lat] coordinate pair?
 
-	        if (vias.length === 0) { return false; }
-	        if (vias.length > 1 && vias.some(function(m) { return m.type !== 'way'; })) { return false; }
 
-	        return true;
-	    },
+	      if (valid.type === 'point') {
+	        var lon = location[0];
+	        var lat = location[1];
+	        var radius = location[2] || 25; // km
 
+	        var EDGES = 10;
+	        var PRECISION = 3;
+	        var area = Math.PI * radius * radius;
+	        var feature = this._cache[id] = precision({
+	          type: 'Feature',
+	          id: id,
+	          properties: {
+	            id: id,
+	            area: Number(area.toFixed(2))
+	          },
+	          geometry: circleToPolygon([lon, lat], radius * 1000, EDGES) // km to m
+
+	        }, PRECISION);
+	        return Object.assign(valid, {
+	          feature: feature
+	        }); // A .geojson filename?
+	      } else if (valid.type === 'geojson') ; else if (valid.type === 'countrycoder') {
+	        var _feature = _cloneDeep(feature$1(id));
+
+	        var props = _feature.properties; // -> This block of code is weird and requires some explanation. <-
+	        // CountryCoder includes higher level features which are made up of members.
+	        // These features don't have their own geometry, but CountryCoder provides an
+	        //   `aggregateFeature` method to combine these members into a MultiPolygon.
+	        // In the past, Turf/JSTS/martinez could not handle the aggregated features,
+	        //   so we'd iteratively union them all together.  (this was slow)
+	        // But now mfogel/polygon-clipping handles these MultiPolygons like a boss.
+	        // This approach also has the benefit of removing all the internal boaders and
+	        //   simplifying the regional polygons a lot.
+
+	        if (Array.isArray(props.members)) {
+	          var aggregate = aggregateFeature(id);
+	          aggregate.geometry.coordinates = _clip([aggregate], 'UNION').geometry.coordinates;
+	          _feature.geometry = aggregate.geometry;
+	        } // Ensure `area` property exists
+
+
+	        if (!props.area) {
+	          var _area = geojsonArea.geometry(_feature.geometry) / 1e6; // m² to km²
+
+
+	          props.area = Number(_area.toFixed(2));
+	        } // Ensure `id` property exists
+
+
+	        _feature.id = id;
+	        props.id = id;
+	        this._cache[id] = _feature;
+	        return Object.assign(valid, {
+	          feature: _feature
+	        });
+	      }
 
-	    // Returns an array [A0, ... An], each Ai being an array of node arrays [Nds0, ... Ndsm],
-	    // where Nds0 is an outer ring and subsequent Ndsi's (if any i > 0) being inner rings.
+	      if (this._strict) {
+	        throw new Error("resolveLocation:  Couldn't resolve location \"".concat(location, "\"."));
+	      } else {
+	        return null;
+	      }
+	    } // validateLocationSet
+	    // `locationSet`  the locationSet to validate
 	    //
-	    // This corresponds to the structure needed for rendering a multipolygon path using a
-	    // `evenodd` fill rule, as well as the structure of a GeoJSON MultiPolygon geometry.
+	    // Pass a locationSet Object to validate like:
+	    //   {
+	    //     include: [ Array of locations ],
+	    //     exclude: [ Array of locations ]
+	    //   }
 	    //
-	    // In the case of invalid geometries, this function will still return a result which
-	    // includes the nodes of all way members, but some Nds may be unclosed and some inner
-	    // rings not matched with the intended outer ring.
+	    // Returns a result like:
+	    //   {
+	    //     type:         'locationset'
+	    //     locationSet:  the queried locationSet
+	    //     id:           the stable identifier for the feature
+	    //   }
+	    // or `null` if the locationSet is invalid
 	    //
-	    multipolygon: function(resolver) {
-	        var outers = this.members.filter(function(m) { return 'outer' === (m.role || 'outer'); });
-	        var inners = this.members.filter(function(m) { return 'inner' === m.role; });
-
-	        outers = osmJoinWays(outers, resolver);
-	        inners = osmJoinWays(inners, resolver);
-
-	        var sequenceToLineString = function(sequence) {
-	            if (sequence.nodes.length > 2 &&
-	                sequence.nodes[0] !== sequence.nodes[sequence.nodes.length - 1]) {
-	                // close unclosed parts to ensure correct area rendering - #2945
-	                sequence.nodes.push(sequence.nodes[0]);
-	            }
-	            return sequence.nodes.map(function(node) { return node.loc; });
-	        };
-
-	        outers = outers.map(sequenceToLineString);
-	        inners = inners.map(sequenceToLineString);
 
-	        var result = outers.map(function(o) {
-	            // Heuristic for detecting counterclockwise winding order. Assumes
-	            // that OpenStreetMap polygons are not hemisphere-spanning.
-	            return [d3_geoArea({ type: 'Polygon', coordinates: [o] }) > 2 * Math.PI ? o.reverse() : o];
-	        });
+	  }, {
+	    key: "validateLocationSet",
+	    value: function validateLocationSet(locationSet) {
+	      locationSet = locationSet || {};
+	      var validator = this.validateLocation.bind(this);
+	      var include = (locationSet.include || []).map(validator).filter(Boolean);
+	      var exclude = (locationSet.exclude || []).map(validator).filter(Boolean);
+
+	      if (!include.length) {
+	        if (this._strict) {
+	          throw new Error("validateLocationSet:  LocationSet includes nothing.");
+	        } else {
+	          // non-strict mode, replace an empty locationSet with one that includes "the world"
+	          locationSet.include = ['Q2'];
+	          include = [{
+	            type: 'countrycoder',
+	            location: 'Q2',
+	            id: 'Q2'
+	          }];
+	        }
+	      } // Generate stable identifier
+
+
+	      include.sort(_sortLocations);
+	      var id = '+[' + include.map(function (d) {
+	        return d.id;
+	      }).join(',') + ']';
+
+	      if (exclude.length) {
+	        exclude.sort(_sortLocations);
+	        id += '-[' + exclude.map(function (d) {
+	          return d.id;
+	        }).join(',') + ']';
+	      }
 
-	        function findOuter(inner) {
-	            var o, outer;
+	      return {
+	        type: 'locationset',
+	        locationSet: locationSet,
+	        id: id
+	      };
+	    } // resolveLocationSet
+	    // `locationSet`  the locationSet to resolve
+	    //
+	    // Pass a locationSet Object to validate like:
+	    //   {
+	    //     include: [ Array of locations ],
+	    //     exclude: [ Array of locations ]
+	    //   }
+	    //
+	    // Returns a result like:
+	    //   {
+	    //     type:         'locationset'
+	    //     locationSet:  the queried locationSet
+	    //     id:           the stable identifier for the feature
+	    //     feature:      the resolved GeoJSON feature
+	    //   }
+	    // or `null` if the locationSet is invalid
+	    //
 
-	            for (o = 0; o < outers.length; o++) {
-	                outer = outers[o];
-	                if (geoPolygonContainsPolygon(outer, inner))
-	                    { return o; }
-	            }
+	  }, {
+	    key: "resolveLocationSet",
+	    value: function resolveLocationSet(locationSet) {
+	      locationSet = locationSet || {};
+	      var valid = this.validateLocationSet(locationSet);
+	      if (!valid) return null;
+	      var id = valid.id; // Return a result from cache if we can
+
+	      if (this._cache[id]) {
+	        return Object.assign(valid, {
+	          feature: this._cache[id]
+	        });
+	      }
 
-	            for (o = 0; o < outers.length; o++) {
-	                outer = outers[o];
-	                if (geoPolygonIntersectsPolygon(outer, inner, false))
-	                    { return o; }
-	            }
-	        }
+	      var resolver = this.resolveLocation.bind(this);
+	      var includes = (locationSet.include || []).map(resolver).filter(Boolean);
+	      var excludes = (locationSet.exclude || []).map(resolver).filter(Boolean); // Return quickly if it's a single included location..
 
-	        for (var i = 0; i < inners.length; i++) {
-	            var inner = inners[i];
+	      if (includes.length === 1 && excludes.length === 0) {
+	        return Object.assign(valid, {
+	          feature: includes[0].feature
+	        });
+	      } // Calculate unions
 
-	            if (d3_geoArea({ type: 'Polygon', coordinates: [inner] }) < 2 * Math.PI) {
-	                inner = inner.reverse();
-	            }
 
-	            var o = findOuter(inners[i]);
-	            if (o !== undefined) {
-	                result[o].push(inners[i]);
-	            } else {
-	                result.push([inners[i]]); // Invalid geometry
-	            }
-	        }
+	      var includeGeoJSON = _clip(includes.map(function (d) {
+	        return d.feature;
+	      }), 'UNION');
 
-	        return result;
-	    }
-	});
+	      var excludeGeoJSON = _clip(excludes.map(function (d) {
+	        return d.feature;
+	      }), 'UNION'); // Calculate difference, update `area` and return result
 
-	var QAItem = function QAItem(loc, service, itemType, id, props) {
-	  // Store required properties
-	  this.loc = loc;
-	  this.service = service.title;
-	  this.itemType = itemType;
 
-	  // All issues must have an ID for selection, use generic if none specified
-	  this.id = id ? id : ("" + (QAItem.id()));
+	      var resultGeoJSON = excludeGeoJSON ? _clip([includeGeoJSON, excludeGeoJSON], 'DIFFERENCE') : includeGeoJSON;
+	      var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6; // m² to km²
 
-	  this.update(props);
+	      resultGeoJSON.id = id;
+	      resultGeoJSON.properties = {
+	        id: id,
+	        area: Number(area.toFixed(2))
+	      };
+	      this._cache[id] = resultGeoJSON;
+	      return Object.assign(valid, {
+	        feature: resultGeoJSON
+	      });
+	    } // strict
+	    //
 
-	  // Some QA services have marker icons to differentiate issues
-	  if (service && typeof service.getIcon === 'function') {
-	    this.icon = service.getIcon(itemType);
-	  }
+	  }, {
+	    key: "strict",
+	    value: function strict(val) {
+	      if (val === undefined) {
+	        // get
+	        return this._strict;
+	      } else {
+	        // set
+	        this._strict = val;
+	        return this;
+	      }
+	    } // cache
+	    // convenience method to access the internal cache
 
-	  return this;
-	};
+	  }, {
+	    key: "cache",
+	    value: function cache() {
+	      return this._cache;
+	    } // stringify
+	    // convenience method to prettyStringify the given object
 
-	QAItem.prototype.update = function update (props) {
-	    var this$1 = this;
+	  }, {
+	    key: "stringify",
+	    value: function stringify(obj, options) {
+	      return jsonStringifyPrettyCompact(obj, options);
+	    }
+	  }]);
+
+	  return _default;
+	}(); // Wrap the mfogel/polygon-clipping library and return a GeoJSON feature.
+
+	function _clip(features, which) {
+	  if (!Array.isArray(features) || !features.length) return null;
+	  var fn = {
+	    UNION: index.union,
+	    DIFFERENCE: index.difference
+	  }[which];
+	  var args = features.map(function (feature) {
+	    return feature.geometry.coordinates;
+	  });
+	  var coords = fn.apply(null, args);
+	  return {
+	    type: 'Feature',
+	    properties: {},
+	    geometry: {
+	      type: whichType(coords),
+	      coordinates: coords
+	    }
+	  }; // is this a Polygon or a MultiPolygon?
 
-	  // You can't override this inital information
-	  var ref = this;
-	    var loc = ref.loc;
-	    var service = ref.service;
-	    var itemType = ref.itemType;
-	    var id = ref.id;
+	  function whichType(coords) {
+	    var a = Array.isArray(coords);
+	    var b = a && Array.isArray(coords[0]);
+	    var c = b && Array.isArray(coords[0][0]);
+	    var d = c && Array.isArray(coords[0][0][0]);
+	    return d ? 'MultiPolygon' : 'Polygon';
+	  }
+	}
 
-	  Object.keys(props).forEach(function (prop) { return this$1[prop] = props[prop]; });
+	function _cloneDeep(obj) {
+	  return JSON.parse(JSON.stringify(obj));
+	} // Sorting the location lists is ok because they end up unioned together.
+	// This sorting makes it possible to generate a deterministic id.
 
-	  this.loc = loc;
-	  this.service = service;
-	  this.itemType = itemType;
-	  this.id = id;
 
-	  return this;
-	};
+	function _sortLocations(a, b) {
+	  var rank = {
+	    countrycoder: 1,
+	    geojson: 2,
+	    point: 3
+	  };
+	  var aRank = rank[a.type];
+	  var bRank = rank[b.type];
+	  return aRank > bRank ? 1 : aRank < bRank ? -1 : a.id.localeCompare(b.id);
+	}
 
-	// Generic handling for newly created QAItems
-	QAItem.id = function id () {
-	  return this.nextId--;
-	};
-	QAItem.nextId = -1;
+	var $$i = _export;
 
-	// Split a way at the given node.
-	//
-	// Optionally, split only the given ways, if multiple ways share
-	// the given node.
-	//
-	// This is the inverse of `iD.actionJoin`.
-	//
-	// For testing convenience, accepts an ID to assign to the new way.
-	// Normally, this will be undefined and the way will automatically
-	// be assigned a new ID.
-	//
-	// Reference:
-	//   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/SplitWayAction.as
-	//
-	function actionSplit(nodeId, newWayIds) {
-	    var _wayIDs;
+	// `Number.MAX_SAFE_INTEGER` constant
+	// https://tc39.es/ecma262/#sec-number.max_safe_integer
+	$$i({ target: 'Number', stat: true }, {
+	  MAX_SAFE_INTEGER: 0x1FFFFFFFFFFFFF
+	});
 
-	    // The IDs of the ways actually created by running this action
-	    var createdWayIDs = [];
+	var aesJs = {exports: {}};
 
-	    // If the way is closed, we need to search for a partner node
-	    // to split the way at.
-	    //
-	    // The following looks for a node that is both far away from
-	    // the initial node in terms of way segment length and nearby
-	    // in terms of beeline-distance. This assures that areas get
-	    // split on the most "natural" points (independent of the number
-	    // of nodes).
-	    // For example: bone-shaped areas get split across their waist
-	    // line, circles across the diameter.
-	    function splitArea(nodes, idxA, graph) {
-	        var lengths = new Array(nodes.length);
-	        var length;
-	        var i;
-	        var best = 0;
-	        var idxB;
+	(function (module, exports) {
+	  (function (root) {
 
-	        function wrap(index) {
-	            return utilWrap(index, nodes.length);
-	        }
+	    function checkInt(value) {
+	      return parseInt(value) === value;
+	    }
 
-	        function dist(nA, nB) {
-	            var locA = graph.entity(nA).loc;
-	            var locB = graph.entity(nB).loc;
-	            var epsilon = 1e-6;
-	            return (locA && locB) ? geoSphericalDistance(locA, locB) : epsilon;
-	        }
+	    function checkInts(arrayish) {
+	      if (!checkInt(arrayish.length)) {
+	        return false;
+	      }
 
-	        // calculate lengths
-	        length = 0;
-	        for (i = wrap(idxA + 1); i !== idxA; i = wrap(i + 1)) {
-	            length += dist(nodes[i], nodes[wrap(i - 1)]);
-	            lengths[i] = length;
+	      for (var i = 0; i < arrayish.length; i++) {
+	        if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
+	          return false;
 	        }
+	      }
 
-	        length = 0;
-	        for (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
-	            length += dist(nodes[i], nodes[wrap(i + 1)]);
-	            if (length < lengths[i]) {
-	                lengths[i] = length;
-	            }
-	        }
+	      return true;
+	    }
 
-	        // determine best opposite node to split
-	        for (i = 0; i < nodes.length; i++) {
-	            var cost = lengths[i] / dist(nodes[idxA], nodes[i]);
-	            if (cost > best) {
-	                idxB = i;
-	                best = cost;
-	            }
+	    function coerceArray(arg, copy) {
+	      // ArrayBuffer view
+	      if (arg.buffer && arg.name === 'Uint8Array') {
+	        if (copy) {
+	          if (arg.slice) {
+	            arg = arg.slice();
+	          } else {
+	            arg = Array.prototype.slice.call(arg);
+	          }
 	        }
 
-	        return idxB;
-	    }
+	        return arg;
+	      } // It's an array; check it is a valid representation of a byte
 
 
-	    function split(graph, wayA, newWayId) {
-	        var wayB = osmWay({ id: newWayId, tags: wayA.tags });   // `wayB` is the NEW way
-	        var origNodes = wayA.nodes.slice();
-	        var nodesA;
-	        var nodesB;
-	        var isArea = wayA.isArea();
-	        var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);
+	      if (Array.isArray(arg)) {
+	        if (!checkInts(arg)) {
+	          throw new Error('Array contains invalid value: ' + arg);
+	        }
 
-	        if (wayA.isClosed()) {
-	            var nodes = wayA.nodes.slice(0, -1);
-	            var idxA = nodes.indexOf(nodeId);
-	            var idxB = splitArea(nodes, idxA, graph);
+	        return new Uint8Array(arg);
+	      } // Something else, but behaves like an array (maybe a Buffer? Arguments?)
 
-	            if (idxB < idxA) {
-	                nodesA = nodes.slice(idxA).concat(nodes.slice(0, idxB + 1));
-	                nodesB = nodes.slice(idxB, idxA + 1);
-	            } else {
-	                nodesA = nodes.slice(idxA, idxB + 1);
-	                nodesB = nodes.slice(idxB).concat(nodes.slice(0, idxA + 1));
-	            }
-	        } else {
-	            var idx = wayA.nodes.indexOf(nodeId, 1);
-	            nodesA = wayA.nodes.slice(0, idx + 1);
-	            nodesB = wayA.nodes.slice(idx);
-	        }
-
-	        wayA = wayA.update({ nodes: nodesA });
-	        wayB = wayB.update({ nodes: nodesB });
-
-	        graph = graph.replace(wayA);
-	        graph = graph.replace(wayB);
-
-	        graph.parentRelations(wayA).forEach(function(relation) {
-	            var member;
-
-	            // Turn restrictions - make sure:
-	            // 1. Splitting a FROM/TO way - only `wayA` OR `wayB` remains in relation
-	            //    (whichever one is connected to the VIA node/ways)
-	            // 2. Splitting a VIA way - `wayB` remains in relation as a VIA way
-	            if (relation.hasFromViaTo()) {
-	                var f = relation.memberByRole('from');
-	                var v = relation.membersByRole('via');
-	                var t = relation.memberByRole('to');
-	                var i;
-
-	                // 1. split a FROM/TO
-	                if (f.id === wayA.id || t.id === wayA.id) {
-	                    var keepB = false;
-	                    if (v.length === 1 && v[0].type === 'node') {   // check via node
-	                        keepB = wayB.contains(v[0].id);
-	                    } else {                                        // check via way(s)
-	                        for (i = 0; i < v.length; i++) {
-	                            if (v[i].type === 'way') {
-	                                var wayVia = graph.hasEntity(v[i].id);
-	                                if (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
-	                                    keepB = true;
-	                                    break;
-	                                }
-	                            }
-	                        }
-	                    }
 
-	                    if (keepB) {
-	                        relation = relation.replaceMember(wayA, wayB);
-	                        graph = graph.replace(relation);
-	                    }
+	      if (checkInt(arg.length) && checkInts(arg)) {
+	        return new Uint8Array(arg);
+	      }
 
-	                // 2. split a VIA
-	                } else {
-	                    for (i = 0; i < v.length; i++) {
-	                        if (v[i].type === 'way' && v[i].id === wayA.id) {
-	                            member = {
-	                                id: wayB.id,
-	                                type: 'way',
-	                                role: 'via'
-	                            };
-	                            graph = actionAddMember(relation.id, member, v[i].index + 1)(graph);
-	                            break;
-	                        }
-	                    }
-	                }
+	      throw new Error('unsupported array-like object');
+	    }
 
-	            // All other relations (Routes, Multipolygons, etc):
-	            // 1. Both `wayA` and `wayB` remain in the relation
-	            // 2. But must be inserted as a pair (see `actionAddMember` for details)
-	            } else {
-	                if (relation === isOuter) {
-	                    graph = graph.replace(relation.mergeTags(wayA.tags));
-	                    graph = graph.replace(wayA.update({ tags: {} }));
-	                    graph = graph.replace(wayB.update({ tags: {} }));
-	                }
+	    function createArray(length) {
+	      return new Uint8Array(length);
+	    }
 
-	                member = {
-	                    id: wayB.id,
-	                    type: 'way',
-	                    role: relation.memberById(wayA.id).role
-	                };
+	    function copyArray(sourceArray, targetArray, targetStart, sourceStart, sourceEnd) {
+	      if (sourceStart != null || sourceEnd != null) {
+	        if (sourceArray.slice) {
+	          sourceArray = sourceArray.slice(sourceStart, sourceEnd);
+	        } else {
+	          sourceArray = Array.prototype.slice.call(sourceArray, sourceStart, sourceEnd);
+	        }
+	      }
 
-	                var insertPair = {
-	                    originalID: wayA.id,
-	                    insertedID: wayB.id,
-	                    nodes: origNodes
-	                };
+	      targetArray.set(sourceArray, targetStart);
+	    }
 
-	                graph = actionAddMember(relation.id, member, undefined, insertPair)(graph);
-	            }
-	        });
+	    var convertUtf8 = function () {
+	      function toBytes(text) {
+	        var result = [],
+	            i = 0;
+	        text = encodeURI(text);
 
-	        if (!isOuter && isArea) {
-	            var multipolygon = osmRelation({
-	                tags: Object.assign({}, wayA.tags, { type: 'multipolygon' }),
-	                members: [
-	                    { id: wayA.id, role: 'outer', type: 'way' },
-	                    { id: wayB.id, role: 'outer', type: 'way' }
-	                ]
-	            });
+	        while (i < text.length) {
+	          var c = text.charCodeAt(i++); // if it is a % sign, encode the following 2 bytes as a hex value
 
-	            graph = graph.replace(multipolygon);
-	            graph = graph.replace(wayA.update({ tags: {} }));
-	            graph = graph.replace(wayB.update({ tags: {} }));
+	          if (c === 37) {
+	            result.push(parseInt(text.substr(i, 2), 16));
+	            i += 2; // otherwise, just the actual byte
+	          } else {
+	            result.push(c);
+	          }
 	        }
 
-	        createdWayIDs.push(wayB.id);
+	        return coerceArray(result);
+	      }
 
-	        return graph;
-	    }
+	      function fromBytes(bytes) {
+	        var result = [],
+	            i = 0;
+
+	        while (i < bytes.length) {
+	          var c = bytes[i];
 
-	    var action = function(graph) {
-	        var candidates = action.ways(graph);
-	        createdWayIDs = [];
-	        for (var i = 0; i < candidates.length; i++) {
-	            graph = split(graph, candidates[i], newWayIds && newWayIds[i]);
+	          if (c < 128) {
+	            result.push(String.fromCharCode(c));
+	            i++;
+	          } else if (c > 191 && c < 224) {
+	            result.push(String.fromCharCode((c & 0x1f) << 6 | bytes[i + 1] & 0x3f));
+	            i += 2;
+	          } else {
+	            result.push(String.fromCharCode((c & 0x0f) << 12 | (bytes[i + 1] & 0x3f) << 6 | bytes[i + 2] & 0x3f));
+	            i += 3;
+	          }
 	        }
-	        return graph;
-	    };
 
-	    action.getCreatedWayIDs = function() {
-	        return createdWayIDs;
-	    };
+	        return result.join('');
+	      }
 
-	    action.ways = function(graph) {
-	        var node = graph.entity(nodeId);
-	        var parents = graph.parentWays(node);
-	        var hasLines = parents.some(function(parent) {
-	            return parent.geometry(graph) === 'line';
-	        });
+	      return {
+	        toBytes: toBytes,
+	        fromBytes: fromBytes
+	      };
+	    }();
 
-	        return parents.filter(function(parent) {
-	            if (_wayIDs && _wayIDs.indexOf(parent.id) === -1)
-	                { return false; }
+	    var convertHex = function () {
+	      function toBytes(text) {
+	        var result = [];
 
-	            if (!_wayIDs && hasLines && parent.geometry(graph) !== 'line')
-	                { return false; }
+	        for (var i = 0; i < text.length; i += 2) {
+	          result.push(parseInt(text.substr(i, 2), 16));
+	        }
 
-	            if (parent.isClosed()) {
-	                return true;
-	            }
+	        return result;
+	      } // http://ixti.net/development/javascript/2011/11/11/base64-encodedecode-of-utf8-in-browser-with-js.html
 
-	            for (var i = 1; i < parent.nodes.length - 1; i++) {
-	                if (parent.nodes[i] === nodeId) {
-	                    return true;
-	                }
-	            }
 
-	            return false;
-	        });
-	    };
+	      var Hex = '0123456789abcdef';
 
+	      function fromBytes(bytes) {
+	        var result = [];
 
-	    action.disabled = function(graph) {
-	        var candidates = action.ways(graph);
-	        if (candidates.length === 0 || (_wayIDs && _wayIDs.length !== candidates.length)) {
-	            return 'not_eligible';
+	        for (var i = 0; i < bytes.length; i++) {
+	          var v = bytes[i];
+	          result.push(Hex[(v & 0xf0) >> 4] + Hex[v & 0x0f]);
 	        }
-	    };
-
-
-	    action.limitWays = function(val) {
-	        if (!arguments.length) { return _wayIDs; }
-	        _wayIDs = val;
-	        return action;
-	    };
-
 
-	    return action;
-	}
-
-	function coreGraph(other, mutable) {
-	    if (!(this instanceof coreGraph)) { return new coreGraph(other, mutable); }
+	        return result.join('');
+	      }
 
-	    if (other instanceof coreGraph) {
-	        var base = other.base();
-	        this.entities = Object.assign(Object.create(base.entities), other.entities);
-	        this._parentWays = Object.assign(Object.create(base.parentWays), other._parentWays);
-	        this._parentRels = Object.assign(Object.create(base.parentRels), other._parentRels);
+	      return {
+	        toBytes: toBytes,
+	        fromBytes: fromBytes
+	      };
+	    }(); // Number of rounds by keysize
 
-	    } else {
-	        this.entities = Object.create({});
-	        this._parentWays = Object.create({});
-	        this._parentRels = Object.create({});
-	        this.rebase(other || [], [this]);
-	    }
 
-	    this.transients = {};
-	    this._childNodes = {};
-	    this.frozen = !mutable;
-	}
+	    var numberOfRounds = {
+	      16: 10,
+	      24: 12,
+	      32: 14
+	    }; // Round constant words
 
+	    var rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91]; // S-box and Inverse S-box (S is for Substitution)
 
-	coreGraph.prototype = {
+	    var S = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16];
+	    var Si = [0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d]; // Transformations for encryption
 
-	    hasEntity: function(id) {
-	        return this.entities[id];
-	    },
+	    var T1 = [0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554, 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d, 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b, 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b, 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a, 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f, 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5, 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d, 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb, 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497, 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c, 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a, 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594, 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81, 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504, 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d, 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f, 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395, 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883, 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c, 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4, 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b, 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7, 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818, 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651, 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21, 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12, 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9, 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133, 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a, 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8, 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11, 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a];
+	    var T2 = [0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, 0x0dfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5, 0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b, 0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676, 0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d, 0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0, 0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, 0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0, 0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626, 0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc, 0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x08f9f1f1, 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515, 0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, 0x28301818, 0xa1379696, 0x0f0a0505, 0xb52f9a9a, 0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2, 0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575, 0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a, 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0, 0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, 0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484, 0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded, 0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b, 0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939, 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf, 0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, 0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585, 0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f, 0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8, 0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f, 0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5, 0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, 0x30201010, 0x1ae5ffff, 0x0efdf3f3, 0x6dbfd2d2, 0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec, 0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717, 0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d, 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373, 0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, 0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888, 0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414, 0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb, 0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a, 0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c, 0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, 0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979, 0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d, 0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9, 0xb4d86c6c, 0xfaac5656, 0x07f3f4f4, 0x25cfeaea, 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808, 0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, 0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6, 0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f, 0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a, 0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666, 0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e, 0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, 0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e, 0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111, 0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494, 0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9, 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf, 0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, 0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868, 0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f, 0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616];
+	    var T3 = [0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, 0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5, 0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b, 0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76, 0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d, 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0, 0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, 0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0, 0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26, 0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc, 0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1, 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15, 0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, 0x18283018, 0x96a13796, 0x050f0a05, 0x9ab52f9a, 0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2, 0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75, 0x091b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a, 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0, 0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, 0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384, 0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed, 0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b, 0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239, 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf, 0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, 0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185, 0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f, 0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8, 0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f, 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5, 0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, 0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2, 0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec, 0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17, 0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d, 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673, 0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, 0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88, 0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814, 0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb, 0xe03bdbe0, 0x32566432, 0x3a4e743a, 0x0a1e140a, 0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c, 0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, 0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279, 0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d, 0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9, 0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea, 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008, 0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, 0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6, 0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f, 0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a, 0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66, 0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e, 0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, 0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e, 0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211, 0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394, 0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9, 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df, 0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d, 0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068, 0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f, 0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16];
+	    var T4 = [0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, 0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491, 0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56, 0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec, 0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa, 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb, 0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, 0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b, 0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c, 0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83, 0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9, 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a, 0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, 0x18182830, 0x9696a137, 0x05050f0a, 0x9a9ab52f, 0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf, 0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea, 0x09091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34, 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b, 0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, 0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713, 0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1, 0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6, 0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72, 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85, 0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, 0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411, 0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe, 0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b, 0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05, 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1, 0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, 0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf, 0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3, 0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e, 0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a, 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6, 0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, 0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b, 0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28, 0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad, 0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0x0a0a1e14, 0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8, 0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, 0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2, 0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da, 0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049, 0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf, 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810, 0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, 0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197, 0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e, 0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f, 0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc, 0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c, 0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, 0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927, 0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322, 0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733, 0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9, 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5, 0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a, 0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0, 0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e, 0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c]; // Transformations for decryption
 
+	    var T5 = [0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393, 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6, 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844, 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94, 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a, 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c, 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a, 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051, 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff, 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb, 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e, 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927, 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, 0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16, 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8, 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120, 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0, 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4, 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5, 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6, 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0, 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f, 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713, 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86, 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541, 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190, 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742];
+	    var T6 = [0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303, 0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3, 0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, 0x02c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9, 0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8, 0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a, 0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b, 0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab, 0x07b2eb28, 0x032fb5c2, 0x9a86c57b, 0xa5d33708, 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682, 0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe, 0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, 0x390b83ec, 0xaa4060ef, 0x065e719f, 0x51bd6e10, 0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, 0xb591548d, 0x0571c45d, 0x6f0406d4, 0xff605015, 0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee, 0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x00000000, 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72, 0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e, 0xb10c0a67, 0x0f9357e7, 0xd2b4ee96, 0x9e1b9b91, 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a, 0x0ae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, 0x0b0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9, 0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e, 0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611, 0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3, 0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390, 0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf, 0xe42c3a9d, 0x0d507892, 0x9b6a5fcc, 0x62547e46, 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af, 0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb, 0x09cd2678, 0xf46e5918, 0x01ec9ab7, 0xa8834f9a, 0x65e6956e, 0x7eaaffe6, 0x0821bccf, 0xe6ef15e8, 0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266, 0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, 0x4af10498, 0xf741ecda, 0x0e7fcd50, 0x2f1791f6, 0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551, 0x049d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647, 0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1, 0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db, 0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, 0x72161dc3, 0x0cbce225, 0x8b283c49, 0x41ff0d95, 0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857];
+	    var T7 = [0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x03934be3, 0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562, 0x5a49deb1, 0x1b6725ba, 0x0e9845ea, 0xc0e15dfe, 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3, 0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9, 0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce, 0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908, 0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, 0xd323ab73, 0x02e2724b, 0x8f57e31f, 0xab2a6655, 0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x08a5d337, 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16, 0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6, 0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e, 0x8af93e21, 0x063d96dd, 0x05aedd3e, 0xbd464de6, 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050, 0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8, 0x0a47a17c, 0x0fe97c42, 0x1ec9f884, 0x00000000, 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a, 0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436, 0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12, 0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, 0x0d0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e, 0x198557f1, 0x074caf75, 0xddbbee99, 0x60fda37f, 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb, 0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, 0xdccad731, 0x85104263, 0x22401397, 0x112084c6, 0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1, 0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233, 0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0x0b3698d4, 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad, 0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3, 0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b, 0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15, 0x9bd9bae7, 0x36ce4a6f, 0x09d4ea9f, 0x7cd629b0, 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2, 0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791, 0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x04dfe496, 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665, 0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6, 0x618c9ad7, 0x0c7a37a1, 0x148e59f8, 0x3c89eb13, 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47, 0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844, 0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d, 0x017139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8];
+	    var T8 = [0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b, 0x30fa5520, 0x766df6ad, 0xcc769188, 0x024c25f5, 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5, 0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b, 0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e, 0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d, 0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x082b94f9, 0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66, 0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, 0x2887f230, 0xbfa5b223, 0x036aba02, 0x16825ced, 0xcf1c2b8a, 0x79b492a7, 0x07f2f0f3, 0x69e2a14e, 0xdaf4cd65, 0x05bed506, 0x34621fd1, 0xa6fe8ac4, 0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd, 0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, 0x548db591, 0xc45d0571, 0x06d46f04, 0x5015ff60, 0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79, 0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x00000000, 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c, 0x0efffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, 0x0fd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24, 0x0a67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c, 0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, 0x090d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814, 0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, 0x01269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b, 0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084, 0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077, 0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22, 0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f, 0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582, 0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb, 0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef, 0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035, 0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, 0x04984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17, 0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46, 0x5eea049d, 0x8c355d01, 0x877473fa, 0x0b412efb, 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d, 0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a, 0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678, 0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0x0d9541ff, 0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0]; // Transformations for decryption key expansion
 
-	    entity: function(id) {
-	        var entity = this.entities[id];
+	    var U1 = [0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3];
+	    var U2 = [0x00000000, 0x0b0e090d, 0x161c121a, 0x1d121b17, 0x2c382434, 0x27362d39, 0x3a24362e, 0x312a3f23, 0x58704868, 0x537e4165, 0x4e6c5a72, 0x4562537f, 0x74486c5c, 0x7f466551, 0x62547e46, 0x695a774b, 0xb0e090d0, 0xbbee99dd, 0xa6fc82ca, 0xadf28bc7, 0x9cd8b4e4, 0x97d6bde9, 0x8ac4a6fe, 0x81caaff3, 0xe890d8b8, 0xe39ed1b5, 0xfe8ccaa2, 0xf582c3af, 0xc4a8fc8c, 0xcfa6f581, 0xd2b4ee96, 0xd9bae79b, 0x7bdb3bbb, 0x70d532b6, 0x6dc729a1, 0x66c920ac, 0x57e31f8f, 0x5ced1682, 0x41ff0d95, 0x4af10498, 0x23ab73d3, 0x28a57ade, 0x35b761c9, 0x3eb968c4, 0x0f9357e7, 0x049d5eea, 0x198f45fd, 0x12814cf0, 0xcb3bab6b, 0xc035a266, 0xdd27b971, 0xd629b07c, 0xe7038f5f, 0xec0d8652, 0xf11f9d45, 0xfa119448, 0x934be303, 0x9845ea0e, 0x8557f119, 0x8e59f814, 0xbf73c737, 0xb47dce3a, 0xa96fd52d, 0xa261dc20, 0xf6ad766d, 0xfda37f60, 0xe0b16477, 0xebbf6d7a, 0xda955259, 0xd19b5b54, 0xcc894043, 0xc787494e, 0xaedd3e05, 0xa5d33708, 0xb8c12c1f, 0xb3cf2512, 0x82e51a31, 0x89eb133c, 0x94f9082b, 0x9ff70126, 0x464de6bd, 0x4d43efb0, 0x5051f4a7, 0x5b5ffdaa, 0x6a75c289, 0x617bcb84, 0x7c69d093, 0x7767d99e, 0x1e3daed5, 0x1533a7d8, 0x0821bccf, 0x032fb5c2, 0x32058ae1, 0x390b83ec, 0x241998fb, 0x2f1791f6, 0x8d764dd6, 0x867844db, 0x9b6a5fcc, 0x906456c1, 0xa14e69e2, 0xaa4060ef, 0xb7527bf8, 0xbc5c72f5, 0xd50605be, 0xde080cb3, 0xc31a17a4, 0xc8141ea9, 0xf93e218a, 0xf2302887, 0xef223390, 0xe42c3a9d, 0x3d96dd06, 0x3698d40b, 0x2b8acf1c, 0x2084c611, 0x11aef932, 0x1aa0f03f, 0x07b2eb28, 0x0cbce225, 0x65e6956e, 0x6ee89c63, 0x73fa8774, 0x78f48e79, 0x49deb15a, 0x42d0b857, 0x5fc2a340, 0x54ccaa4d, 0xf741ecda, 0xfc4fe5d7, 0xe15dfec0, 0xea53f7cd, 0xdb79c8ee, 0xd077c1e3, 0xcd65daf4, 0xc66bd3f9, 0xaf31a4b2, 0xa43fadbf, 0xb92db6a8, 0xb223bfa5, 0x83098086, 0x8807898b, 0x9515929c, 0x9e1b9b91, 0x47a17c0a, 0x4caf7507, 0x51bd6e10, 0x5ab3671d, 0x6b99583e, 0x60975133, 0x7d854a24, 0x768b4329, 0x1fd13462, 0x14df3d6f, 0x09cd2678, 0x02c32f75, 0x33e91056, 0x38e7195b, 0x25f5024c, 0x2efb0b41, 0x8c9ad761, 0x8794de6c, 0x9a86c57b, 0x9188cc76, 0xa0a2f355, 0xabacfa58, 0xb6bee14f, 0xbdb0e842, 0xd4ea9f09, 0xdfe49604, 0xc2f68d13, 0xc9f8841e, 0xf8d2bb3d, 0xf3dcb230, 0xeecea927, 0xe5c0a02a, 0x3c7a47b1, 0x37744ebc, 0x2a6655ab, 0x21685ca6, 0x10426385, 0x1b4c6a88, 0x065e719f, 0x0d507892, 0x640a0fd9, 0x6f0406d4, 0x72161dc3, 0x791814ce, 0x48322bed, 0x433c22e0, 0x5e2e39f7, 0x552030fa, 0x01ec9ab7, 0x0ae293ba, 0x17f088ad, 0x1cfe81a0, 0x2dd4be83, 0x26dab78e, 0x3bc8ac99, 0x30c6a594, 0x599cd2df, 0x5292dbd2, 0x4f80c0c5, 0x448ec9c8, 0x75a4f6eb, 0x7eaaffe6, 0x63b8e4f1, 0x68b6edfc, 0xb10c0a67, 0xba02036a, 0xa710187d, 0xac1e1170, 0x9d342e53, 0x963a275e, 0x8b283c49, 0x80263544, 0xe97c420f, 0xe2724b02, 0xff605015, 0xf46e5918, 0xc544663b, 0xce4a6f36, 0xd3587421, 0xd8567d2c, 0x7a37a10c, 0x7139a801, 0x6c2bb316, 0x6725ba1b, 0x560f8538, 0x5d018c35, 0x40139722, 0x4b1d9e2f, 0x2247e964, 0x2949e069, 0x345bfb7e, 0x3f55f273, 0x0e7fcd50, 0x0571c45d, 0x1863df4a, 0x136dd647, 0xcad731dc, 0xc1d938d1, 0xdccb23c6, 0xd7c52acb, 0xe6ef15e8, 0xede11ce5, 0xf0f307f2, 0xfbfd0eff, 0x92a779b4, 0x99a970b9, 0x84bb6bae, 0x8fb562a3, 0xbe9f5d80, 0xb591548d, 0xa8834f9a, 0xa38d4697];
+	    var U3 = [0x00000000, 0x0d0b0e09, 0x1a161c12, 0x171d121b, 0x342c3824, 0x3927362d, 0x2e3a2436, 0x23312a3f, 0x68587048, 0x65537e41, 0x724e6c5a, 0x7f456253, 0x5c74486c, 0x517f4665, 0x4662547e, 0x4b695a77, 0xd0b0e090, 0xddbbee99, 0xcaa6fc82, 0xc7adf28b, 0xe49cd8b4, 0xe997d6bd, 0xfe8ac4a6, 0xf381caaf, 0xb8e890d8, 0xb5e39ed1, 0xa2fe8cca, 0xaff582c3, 0x8cc4a8fc, 0x81cfa6f5, 0x96d2b4ee, 0x9bd9bae7, 0xbb7bdb3b, 0xb670d532, 0xa16dc729, 0xac66c920, 0x8f57e31f, 0x825ced16, 0x9541ff0d, 0x984af104, 0xd323ab73, 0xde28a57a, 0xc935b761, 0xc43eb968, 0xe70f9357, 0xea049d5e, 0xfd198f45, 0xf012814c, 0x6bcb3bab, 0x66c035a2, 0x71dd27b9, 0x7cd629b0, 0x5fe7038f, 0x52ec0d86, 0x45f11f9d, 0x48fa1194, 0x03934be3, 0x0e9845ea, 0x198557f1, 0x148e59f8, 0x37bf73c7, 0x3ab47dce, 0x2da96fd5, 0x20a261dc, 0x6df6ad76, 0x60fda37f, 0x77e0b164, 0x7aebbf6d, 0x59da9552, 0x54d19b5b, 0x43cc8940, 0x4ec78749, 0x05aedd3e, 0x08a5d337, 0x1fb8c12c, 0x12b3cf25, 0x3182e51a, 0x3c89eb13, 0x2b94f908, 0x269ff701, 0xbd464de6, 0xb04d43ef, 0xa75051f4, 0xaa5b5ffd, 0x896a75c2, 0x84617bcb, 0x937c69d0, 0x9e7767d9, 0xd51e3dae, 0xd81533a7, 0xcf0821bc, 0xc2032fb5, 0xe132058a, 0xec390b83, 0xfb241998, 0xf62f1791, 0xd68d764d, 0xdb867844, 0xcc9b6a5f, 0xc1906456, 0xe2a14e69, 0xefaa4060, 0xf8b7527b, 0xf5bc5c72, 0xbed50605, 0xb3de080c, 0xa4c31a17, 0xa9c8141e, 0x8af93e21, 0x87f23028, 0x90ef2233, 0x9de42c3a, 0x063d96dd, 0x0b3698d4, 0x1c2b8acf, 0x112084c6, 0x3211aef9, 0x3f1aa0f0, 0x2807b2eb, 0x250cbce2, 0x6e65e695, 0x636ee89c, 0x7473fa87, 0x7978f48e, 0x5a49deb1, 0x5742d0b8, 0x405fc2a3, 0x4d54ccaa, 0xdaf741ec, 0xd7fc4fe5, 0xc0e15dfe, 0xcdea53f7, 0xeedb79c8, 0xe3d077c1, 0xf4cd65da, 0xf9c66bd3, 0xb2af31a4, 0xbfa43fad, 0xa8b92db6, 0xa5b223bf, 0x86830980, 0x8b880789, 0x9c951592, 0x919e1b9b, 0x0a47a17c, 0x074caf75, 0x1051bd6e, 0x1d5ab367, 0x3e6b9958, 0x33609751, 0x247d854a, 0x29768b43, 0x621fd134, 0x6f14df3d, 0x7809cd26, 0x7502c32f, 0x5633e910, 0x5b38e719, 0x4c25f502, 0x412efb0b, 0x618c9ad7, 0x6c8794de, 0x7b9a86c5, 0x769188cc, 0x55a0a2f3, 0x58abacfa, 0x4fb6bee1, 0x42bdb0e8, 0x09d4ea9f, 0x04dfe496, 0x13c2f68d, 0x1ec9f884, 0x3df8d2bb, 0x30f3dcb2, 0x27eecea9, 0x2ae5c0a0, 0xb13c7a47, 0xbc37744e, 0xab2a6655, 0xa621685c, 0x85104263, 0x881b4c6a, 0x9f065e71, 0x920d5078, 0xd9640a0f, 0xd46f0406, 0xc372161d, 0xce791814, 0xed48322b, 0xe0433c22, 0xf75e2e39, 0xfa552030, 0xb701ec9a, 0xba0ae293, 0xad17f088, 0xa01cfe81, 0x832dd4be, 0x8e26dab7, 0x993bc8ac, 0x9430c6a5, 0xdf599cd2, 0xd25292db, 0xc54f80c0, 0xc8448ec9, 0xeb75a4f6, 0xe67eaaff, 0xf163b8e4, 0xfc68b6ed, 0x67b10c0a, 0x6aba0203, 0x7da71018, 0x70ac1e11, 0x539d342e, 0x5e963a27, 0x498b283c, 0x44802635, 0x0fe97c42, 0x02e2724b, 0x15ff6050, 0x18f46e59, 0x3bc54466, 0x36ce4a6f, 0x21d35874, 0x2cd8567d, 0x0c7a37a1, 0x017139a8, 0x166c2bb3, 0x1b6725ba, 0x38560f85, 0x355d018c, 0x22401397, 0x2f4b1d9e, 0x642247e9, 0x692949e0, 0x7e345bfb, 0x733f55f2, 0x500e7fcd, 0x5d0571c4, 0x4a1863df, 0x47136dd6, 0xdccad731, 0xd1c1d938, 0xc6dccb23, 0xcbd7c52a, 0xe8e6ef15, 0xe5ede11c, 0xf2f0f307, 0xfffbfd0e, 0xb492a779, 0xb999a970, 0xae84bb6b, 0xa38fb562, 0x80be9f5d, 0x8db59154, 0x9aa8834f, 0x97a38d46];
+	    var U4 = [0x00000000, 0x090d0b0e, 0x121a161c, 0x1b171d12, 0x24342c38, 0x2d392736, 0x362e3a24, 0x3f23312a, 0x48685870, 0x4165537e, 0x5a724e6c, 0x537f4562, 0x6c5c7448, 0x65517f46, 0x7e466254, 0x774b695a, 0x90d0b0e0, 0x99ddbbee, 0x82caa6fc, 0x8bc7adf2, 0xb4e49cd8, 0xbde997d6, 0xa6fe8ac4, 0xaff381ca, 0xd8b8e890, 0xd1b5e39e, 0xcaa2fe8c, 0xc3aff582, 0xfc8cc4a8, 0xf581cfa6, 0xee96d2b4, 0xe79bd9ba, 0x3bbb7bdb, 0x32b670d5, 0x29a16dc7, 0x20ac66c9, 0x1f8f57e3, 0x16825ced, 0x0d9541ff, 0x04984af1, 0x73d323ab, 0x7ade28a5, 0x61c935b7, 0x68c43eb9, 0x57e70f93, 0x5eea049d, 0x45fd198f, 0x4cf01281, 0xab6bcb3b, 0xa266c035, 0xb971dd27, 0xb07cd629, 0x8f5fe703, 0x8652ec0d, 0x9d45f11f, 0x9448fa11, 0xe303934b, 0xea0e9845, 0xf1198557, 0xf8148e59, 0xc737bf73, 0xce3ab47d, 0xd52da96f, 0xdc20a261, 0x766df6ad, 0x7f60fda3, 0x6477e0b1, 0x6d7aebbf, 0x5259da95, 0x5b54d19b, 0x4043cc89, 0x494ec787, 0x3e05aedd, 0x3708a5d3, 0x2c1fb8c1, 0x2512b3cf, 0x1a3182e5, 0x133c89eb, 0x082b94f9, 0x01269ff7, 0xe6bd464d, 0xefb04d43, 0xf4a75051, 0xfdaa5b5f, 0xc2896a75, 0xcb84617b, 0xd0937c69, 0xd99e7767, 0xaed51e3d, 0xa7d81533, 0xbccf0821, 0xb5c2032f, 0x8ae13205, 0x83ec390b, 0x98fb2419, 0x91f62f17, 0x4dd68d76, 0x44db8678, 0x5fcc9b6a, 0x56c19064, 0x69e2a14e, 0x60efaa40, 0x7bf8b752, 0x72f5bc5c, 0x05bed506, 0x0cb3de08, 0x17a4c31a, 0x1ea9c814, 0x218af93e, 0x2887f230, 0x3390ef22, 0x3a9de42c, 0xdd063d96, 0xd40b3698, 0xcf1c2b8a, 0xc6112084, 0xf93211ae, 0xf03f1aa0, 0xeb2807b2, 0xe2250cbc, 0x956e65e6, 0x9c636ee8, 0x877473fa, 0x8e7978f4, 0xb15a49de, 0xb85742d0, 0xa3405fc2, 0xaa4d54cc, 0xecdaf741, 0xe5d7fc4f, 0xfec0e15d, 0xf7cdea53, 0xc8eedb79, 0xc1e3d077, 0xdaf4cd65, 0xd3f9c66b, 0xa4b2af31, 0xadbfa43f, 0xb6a8b92d, 0xbfa5b223, 0x80868309, 0x898b8807, 0x929c9515, 0x9b919e1b, 0x7c0a47a1, 0x75074caf, 0x6e1051bd, 0x671d5ab3, 0x583e6b99, 0x51336097, 0x4a247d85, 0x4329768b, 0x34621fd1, 0x3d6f14df, 0x267809cd, 0x2f7502c3, 0x105633e9, 0x195b38e7, 0x024c25f5, 0x0b412efb, 0xd7618c9a, 0xde6c8794, 0xc57b9a86, 0xcc769188, 0xf355a0a2, 0xfa58abac, 0xe14fb6be, 0xe842bdb0, 0x9f09d4ea, 0x9604dfe4, 0x8d13c2f6, 0x841ec9f8, 0xbb3df8d2, 0xb230f3dc, 0xa927eece, 0xa02ae5c0, 0x47b13c7a, 0x4ebc3774, 0x55ab2a66, 0x5ca62168, 0x63851042, 0x6a881b4c, 0x719f065e, 0x78920d50, 0x0fd9640a, 0x06d46f04, 0x1dc37216, 0x14ce7918, 0x2bed4832, 0x22e0433c, 0x39f75e2e, 0x30fa5520, 0x9ab701ec, 0x93ba0ae2, 0x88ad17f0, 0x81a01cfe, 0xbe832dd4, 0xb78e26da, 0xac993bc8, 0xa59430c6, 0xd2df599c, 0xdbd25292, 0xc0c54f80, 0xc9c8448e, 0xf6eb75a4, 0xffe67eaa, 0xe4f163b8, 0xedfc68b6, 0x0a67b10c, 0x036aba02, 0x187da710, 0x1170ac1e, 0x2e539d34, 0x275e963a, 0x3c498b28, 0x35448026, 0x420fe97c, 0x4b02e272, 0x5015ff60, 0x5918f46e, 0x663bc544, 0x6f36ce4a, 0x7421d358, 0x7d2cd856, 0xa10c7a37, 0xa8017139, 0xb3166c2b, 0xba1b6725, 0x8538560f, 0x8c355d01, 0x97224013, 0x9e2f4b1d, 0xe9642247, 0xe0692949, 0xfb7e345b, 0xf2733f55, 0xcd500e7f, 0xc45d0571, 0xdf4a1863, 0xd647136d, 0x31dccad7, 0x38d1c1d9, 0x23c6dccb, 0x2acbd7c5, 0x15e8e6ef, 0x1ce5ede1, 0x07f2f0f3, 0x0efffbfd, 0x79b492a7, 0x70b999a9, 0x6bae84bb, 0x62a38fb5, 0x5d80be9f, 0x548db591, 0x4f9aa883, 0x4697a38d];
 
-	        //https://github.com/openstreetmap/iD/issues/3973#issuecomment-307052376
-	        if (!entity) {
-	            entity = this.entities.__proto__[id];  // eslint-disable-line no-proto
-	        }
+	    function convertToInt32(bytes) {
+	      var result = [];
 
-	        if (!entity) {
-	            throw new Error('entity ' + id + ' not found');
-	        }
-	        return entity;
-	    },
+	      for (var i = 0; i < bytes.length; i += 4) {
+	        result.push(bytes[i] << 24 | bytes[i + 1] << 16 | bytes[i + 2] << 8 | bytes[i + 3]);
+	      }
 
+	      return result;
+	    }
 
-	    geometry: function(id) {
-	        return this.entity(id).geometry(this);
-	    },
+	    var AES = function AES(key) {
+	      if (!(this instanceof AES)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
+	      Object.defineProperty(this, 'key', {
+	        value: coerceArray(key, true)
+	      });
 
-	    transient: function(entity, key, fn) {
-	        var id = entity.id;
-	        var transients = this.transients[id] || (this.transients[id] = {});
+	      this._prepare();
+	    };
 
-	        if (transients[key] !== undefined) {
-	            return transients[key];
-	        }
+	    AES.prototype._prepare = function () {
+	      var rounds = numberOfRounds[this.key.length];
 
-	        transients[key] = fn.call(entity);
+	      if (rounds == null) {
+	        throw new Error('invalid key size (must be 16, 24 or 32 bytes)');
+	      } // encryption round keys
 
-	        return transients[key];
-	    },
 
+	      this._Ke = []; // decryption round keys
 
-	    parentWays: function(entity) {
-	        var parents = this._parentWays[entity.id];
-	        var result = [];
-	        if (parents) {
-	            parents.forEach(function(id) {
-	                result.push(this.entity(id));
-	            }, this);
-	        }
-	        return result;
-	    },
+	      this._Kd = [];
 
+	      for (var i = 0; i <= rounds; i++) {
+	        this._Ke.push([0, 0, 0, 0]);
 
-	    isPoi: function(entity) {
-	        var parents = this._parentWays[entity.id];
-	        return !parents || parents.size === 0;
-	    },
+	        this._Kd.push([0, 0, 0, 0]);
+	      }
 
+	      var roundKeyCount = (rounds + 1) * 4;
+	      var KC = this.key.length / 4; // convert the key into ints
 
-	    isShared: function(entity) {
-	        var parents = this._parentWays[entity.id];
-	        return parents && parents.size > 1;
-	    },
+	      var tk = convertToInt32(this.key); // copy values into round key arrays
 
+	      var index;
 
-	    parentRelations: function(entity) {
-	        var parents = this._parentRels[entity.id];
-	        var result = [];
-	        if (parents) {
-	            parents.forEach(function(id) {
-	                result.push(this.entity(id));
-	            }, this);
-	        }
-	        return result;
-	    },
+	      for (var i = 0; i < KC; i++) {
+	        index = i >> 2;
+	        this._Ke[index][i % 4] = tk[i];
+	        this._Kd[rounds - index][i % 4] = tk[i];
+	      } // key expansion (fips-197 section 5.2)
 
-	    parentMultipolygons: function(entity) {
-	        return this.parentRelations(entity).filter(function(relation) {
-	            return relation.isMultipolygon();
-	        });
-	    },
 
+	      var rconpointer = 0;
+	      var t = KC,
+	          tt;
 
-	    childNodes: function(entity) {
-	        if (this._childNodes[entity.id]) { return this._childNodes[entity.id]; }
-	        if (!entity.nodes) { return []; }
+	      while (t < roundKeyCount) {
+	        tt = tk[KC - 1];
+	        tk[0] ^= S[tt >> 16 & 0xFF] << 24 ^ S[tt >> 8 & 0xFF] << 16 ^ S[tt & 0xFF] << 8 ^ S[tt >> 24 & 0xFF] ^ rcon[rconpointer] << 24;
+	        rconpointer += 1; // key expansion (for non-256 bit)
 
-	        var nodes = [];
-	        for (var i = 0; i < entity.nodes.length; i++) {
-	            nodes[i] = this.entity(entity.nodes[i]);
-	        }
+	        if (KC != 8) {
+	          for (var i = 1; i < KC; i++) {
+	            tk[i] ^= tk[i - 1];
+	          } // key expansion for 256-bit keys is "slightly different" (fips-197)
 
-	        this._childNodes[entity.id] = nodes;
-	        return this._childNodes[entity.id];
-	    },
+	        } else {
+	          for (var i = 1; i < KC / 2; i++) {
+	            tk[i] ^= tk[i - 1];
+	          }
 
+	          tt = tk[KC / 2 - 1];
+	          tk[KC / 2] ^= S[tt & 0xFF] ^ S[tt >> 8 & 0xFF] << 8 ^ S[tt >> 16 & 0xFF] << 16 ^ S[tt >> 24 & 0xFF] << 24;
 
-	    base: function() {
-	        return {
-	            'entities': Object.getPrototypeOf(this.entities),
-	            'parentWays': Object.getPrototypeOf(this._parentWays),
-	            'parentRels': Object.getPrototypeOf(this._parentRels)
-	        };
-	    },
+	          for (var i = KC / 2 + 1; i < KC; i++) {
+	            tk[i] ^= tk[i - 1];
+	          }
+	        } // copy values into round key arrays
 
 
-	    // Unlike other graph methods, rebase mutates in place. This is because it
-	    // is used only during the history operation that merges newly downloaded
-	    // data into each state. To external consumers, it should appear as if the
-	    // graph always contained the newly downloaded data.
-	    rebase: function(entities, stack, force) {
-	        var base = this.base();
-	        var i, j, k, id;
-
-	        for (i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-
-	            if (!entity.visible || (!force && base.entities[entity.id]))
-	                { continue; }
-
-	            // Merging data into the base graph
-	            base.entities[entity.id] = entity;
-	            this._updateCalculated(undefined, entity, base.parentWays, base.parentRels);
-
-	            // Restore provisionally-deleted nodes that are discovered to have an extant parent
-	            if (entity.type === 'way') {
-	                for (j = 0; j < entity.nodes.length; j++) {
-	                    id = entity.nodes[j];
-	                    for (k = 1; k < stack.length; k++) {
-	                        var ents = stack[k].entities;
-	                        if (ents.hasOwnProperty(id) && ents[id] === undefined) {
-	                            delete ents[id];
-	                        }
-	                    }
-	                }
-	            }
-	        }
+	        var i = 0,
+	            r,
+	            c;
 
-	        for (i = 0; i < stack.length; i++) {
-	            stack[i]._updateRebased();
+	        while (i < KC && t < roundKeyCount) {
+	          r = t >> 2;
+	          c = t % 4;
+	          this._Ke[r][c] = tk[i];
+	          this._Kd[rounds - r][c] = tk[i++];
+	          t++;
 	        }
-	    },
-
+	      } // inverse-cipher-ify the decryption round key (fips-197 section 5.3)
 
-	    _updateRebased: function() {
-	        var base = this.base();
 
-	        Object.keys(this._parentWays).forEach(function(child) {
-	            if (base.parentWays[child]) {
-	                base.parentWays[child].forEach(function(id) {
-	                    if (!this.entities.hasOwnProperty(id)) {
-	                        this._parentWays[child].add(id);
-	                    }
-	                }, this);
-	            }
-	        }, this);
+	      for (var r = 1; r < rounds; r++) {
+	        for (var c = 0; c < 4; c++) {
+	          tt = this._Kd[r][c];
+	          this._Kd[r][c] = U1[tt >> 24 & 0xFF] ^ U2[tt >> 16 & 0xFF] ^ U3[tt >> 8 & 0xFF] ^ U4[tt & 0xFF];
+	        }
+	      }
+	    };
 
-	        Object.keys(this._parentRels).forEach(function(child) {
-	            if (base.parentRels[child]) {
-	                base.parentRels[child].forEach(function(id) {
-	                    if (!this.entities.hasOwnProperty(id)) {
-	                        this._parentRels[child].add(id);
-	                    }
-	                }, this);
-	            }
-	        }, this);
+	    AES.prototype.encrypt = function (plaintext) {
+	      if (plaintext.length != 16) {
+	        throw new Error('invalid plaintext size (must be 16 bytes)');
+	      }
 
-	        this.transients = {};
+	      var rounds = this._Ke.length - 1;
+	      var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
 
-	        // this._childNodes is not updated, under the assumption that
-	        // ways are always downloaded with their child nodes.
-	    },
+	      var t = convertToInt32(plaintext);
 
+	      for (var i = 0; i < 4; i++) {
+	        t[i] ^= this._Ke[0][i];
+	      } // apply round transforms
 
-	    // Updates calculated properties (parentWays, parentRels) for the specified change
-	    _updateCalculated: function(oldentity, entity, parentWays, parentRels) {
-	        parentWays = parentWays || this._parentWays;
-	        parentRels = parentRels || this._parentRels;
-
-	        var type = entity && entity.type || oldentity && oldentity.type;
-	        var removed, added, i;
-
-	        if (type === 'way') {   // Update parentWays
-	            if (oldentity && entity) {
-	                removed = utilArrayDifference(oldentity.nodes, entity.nodes);
-	                added = utilArrayDifference(entity.nodes, oldentity.nodes);
-	            } else if (oldentity) {
-	                removed = oldentity.nodes;
-	                added = [];
-	            } else if (entity) {
-	                removed = [];
-	                added = entity.nodes;
-	            }
-	            for (i = 0; i < removed.length; i++) {
-	                // make a copy of prototype property, store as own property, and update..
-	                parentWays[removed[i]] = new Set(parentWays[removed[i]]);
-	                parentWays[removed[i]].delete(oldentity.id);
-	            }
-	            for (i = 0; i < added.length; i++) {
-	                // make a copy of prototype property, store as own property, and update..
-	                parentWays[added[i]] = new Set(parentWays[added[i]]);
-	                parentWays[added[i]].add(entity.id);
-	            }
 
-	        } else if (type === 'relation') {   // Update parentRels
-
-	            // diff only on the IDs since the same entity can be a member multiple times with different roles
-	            var oldentityMemberIDs = oldentity ? oldentity.members.map(function(m) { return m.id; }) : [];
-	            var entityMemberIDs = entity ? entity.members.map(function(m) { return m.id; }) : [];
-
-	            if (oldentity && entity) {
-	                removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
-	                added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
-	            } else if (oldentity) {
-	                removed = oldentityMemberIDs;
-	                added = [];
-	            } else if (entity) {
-	                removed = [];
-	                added = entityMemberIDs;
-	            }
-	            for (i = 0; i < removed.length; i++) {
-	                // make a copy of prototype property, store as own property, and update..
-	                parentRels[removed[i]] = new Set(parentRels[removed[i]]);
-	                parentRels[removed[i]].delete(oldentity.id);
-	            }
-	            for (i = 0; i < added.length; i++) {
-	                // make a copy of prototype property, store as own property, and update..
-	                parentRels[added[i]] = new Set(parentRels[added[i]]);
-	                parentRels[added[i]].add(entity.id);
-	            }
+	      for (var r = 1; r < rounds; r++) {
+	        for (var i = 0; i < 4; i++) {
+	          a[i] = T1[t[i] >> 24 & 0xff] ^ T2[t[(i + 1) % 4] >> 16 & 0xff] ^ T3[t[(i + 2) % 4] >> 8 & 0xff] ^ T4[t[(i + 3) % 4] & 0xff] ^ this._Ke[r][i];
 	        }
-	    },
 
+	        t = a.slice();
+	      } // the last round is special
 
-	    replace: function(entity) {
-	        if (this.entities[entity.id] === entity) { return this; }
 
-	        return this.update(function() {
-	            this._updateCalculated(this.entities[entity.id], entity);
-	            this.entities[entity.id] = entity;
-	        });
-	    },
+	      var result = createArray(16),
+	          tt;
 
+	      for (var i = 0; i < 4; i++) {
+	        tt = this._Ke[rounds][i];
+	        result[4 * i] = (S[t[i] >> 24 & 0xff] ^ tt >> 24) & 0xff;
+	        result[4 * i + 1] = (S[t[(i + 1) % 4] >> 16 & 0xff] ^ tt >> 16) & 0xff;
+	        result[4 * i + 2] = (S[t[(i + 2) % 4] >> 8 & 0xff] ^ tt >> 8) & 0xff;
+	        result[4 * i + 3] = (S[t[(i + 3) % 4] & 0xff] ^ tt) & 0xff;
+	      }
 
-	    remove: function(entity) {
-	        return this.update(function() {
-	            this._updateCalculated(entity, undefined);
-	            this.entities[entity.id] = undefined;
-	        });
-	    },
+	      return result;
+	    };
 
+	    AES.prototype.decrypt = function (ciphertext) {
+	      if (ciphertext.length != 16) {
+	        throw new Error('invalid ciphertext size (must be 16 bytes)');
+	      }
 
-	    revert: function(id) {
-	        var baseEntity = this.base().entities[id];
-	        var headEntity = this.entities[id];
-	        if (headEntity === baseEntity) { return this; }
+	      var rounds = this._Kd.length - 1;
+	      var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
 
-	        return this.update(function() {
-	            this._updateCalculated(headEntity, baseEntity);
-	            delete this.entities[id];
-	        });
-	    },
+	      var t = convertToInt32(ciphertext);
 
+	      for (var i = 0; i < 4; i++) {
+	        t[i] ^= this._Kd[0][i];
+	      } // apply round transforms
 
-	    update: function() {
-	        var arguments$1 = arguments;
 
-	        var graph = this.frozen ? coreGraph(this, true) : this;
-	        for (var i = 0; i < arguments.length; i++) {
-	            arguments$1[i].call(graph, graph);
+	      for (var r = 1; r < rounds; r++) {
+	        for (var i = 0; i < 4; i++) {
+	          a[i] = T5[t[i] >> 24 & 0xff] ^ T6[t[(i + 3) % 4] >> 16 & 0xff] ^ T7[t[(i + 2) % 4] >> 8 & 0xff] ^ T8[t[(i + 1) % 4] & 0xff] ^ this._Kd[r][i];
 	        }
 
-	        if (this.frozen) { graph.frozen = true; }
-
-	        return graph;
-	    },
+	        t = a.slice();
+	      } // the last round is special
 
 
-	    // Obliterates any existing entities
-	    load: function(entities) {
-	        var base = this.base();
-	        this.entities = Object.create(base.entities);
+	      var result = createArray(16),
+	          tt;
 
-	        for (var i in entities) {
-	            this.entities[i] = entities[i];
-	            this._updateCalculated(base.entities[i], this.entities[i]);
-	        }
+	      for (var i = 0; i < 4; i++) {
+	        tt = this._Kd[rounds][i];
+	        result[4 * i] = (Si[t[i] >> 24 & 0xff] ^ tt >> 24) & 0xff;
+	        result[4 * i + 1] = (Si[t[(i + 3) % 4] >> 16 & 0xff] ^ tt >> 16) & 0xff;
+	        result[4 * i + 2] = (Si[t[(i + 2) % 4] >> 8 & 0xff] ^ tt >> 8) & 0xff;
+	        result[4 * i + 3] = (Si[t[(i + 1) % 4] & 0xff] ^ tt) & 0xff;
+	      }
 
-	        return this;
-	    }
-	};
+	      return result;
+	    };
+	    /**
+	     *  Mode Of Operation - Electonic Codebook (ECB)
+	     */
 
-	function osmTurn(turn) {
-	    if (!(this instanceof osmTurn)) {
-	        return new osmTurn(turn);
-	    }
-	    Object.assign(this, turn);
-	}
 
+	    var ModeOfOperationECB = function ModeOfOperationECB(key) {
+	      if (!(this instanceof ModeOfOperationECB)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	function osmIntersection(graph, startVertexId, maxDistance) {
-	    maxDistance = maxDistance || 30;    // in meters
-	    var vgraph = coreGraph();           // virtual graph
-	    var i, j, k;
+	      this.description = "Electronic Code Block";
+	      this.name = "ecb";
+	      this._aes = new AES(key);
+	    };
 
+	    ModeOfOperationECB.prototype.encrypt = function (plaintext) {
+	      plaintext = coerceArray(plaintext);
 
-	    function memberOfRestriction(entity) {
-	        return graph.parentRelations(entity)
-	            .some(function(r) { return r.isRestriction(); });
-	    }
-
-	    function isRoad(way) {
-	        if (way.isArea() || way.isDegenerate()) { return false; }
-	        var roads = {
-	            'motorway': true,
-	            'motorway_link': true,
-	            'trunk': true,
-	            'trunk_link': true,
-	            'primary': true,
-	            'primary_link': true,
-	            'secondary': true,
-	            'secondary_link': true,
-	            'tertiary': true,
-	            'tertiary_link': true,
-	            'residential': true,
-	            'unclassified': true,
-	            'living_street': true,
-	            'service': true,
-	            'road': true,
-	            'track': true
-	        };
-	        return roads[way.tags.highway];
-	    }
+	      if (plaintext.length % 16 !== 0) {
+	        throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
+	      }
 
+	      var ciphertext = createArray(plaintext.length);
+	      var block = createArray(16);
 
-	    var startNode = graph.entity(startVertexId);
-	    var checkVertices = [startNode];
-	    var checkWays;
-	    var vertices = [];
-	    var vertexIds = [];
-	    var vertex;
-	    var ways = [];
-	    var wayIds = [];
-	    var way;
-	    var nodes = [];
-	    var node;
-	    var parents = [];
-	    var parent;
+	      for (var i = 0; i < plaintext.length; i += 16) {
+	        copyArray(plaintext, block, 0, i, i + 16);
+	        block = this._aes.encrypt(block);
+	        copyArray(block, ciphertext, i);
+	      }
 
-	    // `actions` will store whatever actions must be performed to satisfy
-	    // preconditions for adding a turn restriction to this intersection.
-	    //  - Remove any existing degenerate turn restrictions (missing from/to, etc)
-	    //  - Reverse oneways so that they are drawn in the forward direction
-	    //  - Split ways on key vertices
-	    var actions = [];
+	      return ciphertext;
+	    };
 
+	    ModeOfOperationECB.prototype.decrypt = function (ciphertext) {
+	      ciphertext = coerceArray(ciphertext);
 
-	    // STEP 1:  walk the graph outwards from starting vertex to search
-	    //  for more key vertices and ways to include in the intersection..
-
-	    while (checkVertices.length) {
-	        vertex = checkVertices.pop();
-
-	        // check this vertex for parent ways that are roads
-	        checkWays = graph.parentWays(vertex);
-	        var hasWays = false;
-	        for (i = 0; i < checkWays.length; i++) {
-	            way = checkWays[i];
-	            if (!isRoad(way) && !memberOfRestriction(way)) { continue; }
-
-	            ways.push(way);   // it's a road, or it's already in a turn restriction
-	            hasWays = true;
-
-	            // check the way's children for more key vertices
-	            nodes = utilArrayUniq(graph.childNodes(way));
-	            for (j = 0; j < nodes.length; j++) {
-	                node = nodes[j];
-	                if (node === vertex) { continue; }                                           // same thing
-	                if (vertices.indexOf(node) !== -1) { continue; }                             // seen it already
-	                if (geoSphericalDistance(node.loc, startNode.loc) > maxDistance) { continue; }   // too far from start
-
-	                // a key vertex will have parents that are also roads
-	                var hasParents = false;
-	                parents = graph.parentWays(node);
-	                for (k = 0; k < parents.length; k++) {
-	                    parent = parents[k];
-	                    if (parent === way) { continue; }                 // same thing
-	                    if (ways.indexOf(parent) !== -1) { continue; }    // seen it already
-	                    if (!isRoad(parent)) { continue; }                // not a road
-	                    hasParents = true;
-	                    break;
-	                }
+	      if (ciphertext.length % 16 !== 0) {
+	        throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
+	      }
 
-	                if (hasParents) {
-	                    checkVertices.push(node);
-	                }
-	            }
-	        }
+	      var plaintext = createArray(ciphertext.length);
+	      var block = createArray(16);
 
-	        if (hasWays) {
-	            vertices.push(vertex);
-	        }
-	    }
+	      for (var i = 0; i < ciphertext.length; i += 16) {
+	        copyArray(ciphertext, block, 0, i, i + 16);
+	        block = this._aes.decrypt(block);
+	        copyArray(block, plaintext, i);
+	      }
 
-	    vertices = utilArrayUniq(vertices);
-	    ways = utilArrayUniq(ways);
+	      return plaintext;
+	    };
+	    /**
+	     *  Mode Of Operation - Cipher Block Chaining (CBC)
+	     */
 
 
-	    // STEP 2:  Build a virtual graph containing only the entities in the intersection..
-	    // Everything done after this step should act on the virtual graph
-	    // Any actions that must be performed later to the main graph go in `actions` array
-	    ways.forEach(function(way) {
-	        graph.childNodes(way).forEach(function(node) {
-	            vgraph = vgraph.replace(node);
-	        });
+	    var ModeOfOperationCBC = function ModeOfOperationCBC(key, iv) {
+	      if (!(this instanceof ModeOfOperationCBC)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	        vgraph = vgraph.replace(way);
+	      this.description = "Cipher Block Chaining";
+	      this.name = "cbc";
 
-	        graph.parentRelations(way).forEach(function(relation) {
-	            if (relation.isRestriction()) {
-	                if (relation.isValidRestriction(graph)) {
-	                    vgraph = vgraph.replace(relation);
-	                } else if (relation.isComplete(graph)) {
-	                    actions.push(actionDeleteRelation(relation.id));
-	                }
-	            }
-	        });
-	    });
+	      if (!iv) {
+	        iv = createArray(16);
+	      } else if (iv.length != 16) {
+	        throw new Error('invalid initialation vector size (must be 16 bytes)');
+	      }
 
+	      this._lastCipherblock = coerceArray(iv, true);
+	      this._aes = new AES(key);
+	    };
 
-	    // STEP 3:  Force all oneways to be drawn in the forward direction
-	    ways.forEach(function(w) {
-	        var way = vgraph.entity(w.id);
-	        if (way.tags.oneway === '-1') {
-	            var action = actionReverse(way.id, { reverseOneway: true });
-	            actions.push(action);
-	            vgraph = action(vgraph);
-	        }
-	    });
+	    ModeOfOperationCBC.prototype.encrypt = function (plaintext) {
+	      plaintext = coerceArray(plaintext);
 
+	      if (plaintext.length % 16 !== 0) {
+	        throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
+	      }
 
-	    // STEP 4:  Split ways on key vertices
-	    var origCount = osmEntity.id.next.way;
-	    vertices.forEach(function(v) {
-	        // This is an odd way to do it, but we need to find all the ways that
-	        // will be split here, then split them one at a time to ensure that these
-	        // actions can be replayed on the main graph exactly in the same order.
-	        // (It is unintuitive, but the order of ways returned from graph.parentWays()
-	        // is arbitrary, depending on how the main graph and vgraph were built)
-	        var splitAll = actionSplit(v.id);
-	        if (!splitAll.disabled(vgraph)) {
-	            splitAll.ways(vgraph).forEach(function(way) {
-	                var splitOne = actionSplit(v.id).limitWays([way.id]);
-	                actions.push(splitOne);
-	                vgraph = splitOne(vgraph);
-	            });
-	        }
-	    });
+	      var ciphertext = createArray(plaintext.length);
+	      var block = createArray(16);
 
-	    // In here is where we should also split the intersection at nearby junction.
-	    //   for https://github.com/mapbox/iD-internal/issues/31
-	    // nearbyVertices.forEach(function(v) {
-	    // });
+	      for (var i = 0; i < plaintext.length; i += 16) {
+	        copyArray(plaintext, block, 0, i, i + 16);
 
-	    // Reasons why we reset the way id count here:
-	    //  1. Continuity with way ids created by the splits so that we can replay
-	    //     these actions later if the user decides to create a turn restriction
-	    //  2. Avoids churning way ids just by hovering over a vertex
-	    //     and displaying the turn restriction editor
-	    osmEntity.id.next.way = origCount;
+	        for (var j = 0; j < 16; j++) {
+	          block[j] ^= this._lastCipherblock[j];
+	        }
 
+	        this._lastCipherblock = this._aes.encrypt(block);
+	        copyArray(this._lastCipherblock, ciphertext, i);
+	      }
 
-	    // STEP 5:  Update arrays to point to vgraph entities
-	    vertexIds = vertices.map(function(v) { return v.id; });
-	    vertices = [];
-	    ways = [];
+	      return ciphertext;
+	    };
 
-	    vertexIds.forEach(function(id) {
-	        var vertex = vgraph.entity(id);
-	        var parents = vgraph.parentWays(vertex);
-	        vertices.push(vertex);
-	        ways = ways.concat(parents);
-	    });
+	    ModeOfOperationCBC.prototype.decrypt = function (ciphertext) {
+	      ciphertext = coerceArray(ciphertext);
 
-	    vertices = utilArrayUniq(vertices);
-	    ways = utilArrayUniq(ways);
+	      if (ciphertext.length % 16 !== 0) {
+	        throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
+	      }
 
-	    vertexIds = vertices.map(function(v) { return v.id; });
-	    wayIds = ways.map(function(w) { return w.id; });
+	      var plaintext = createArray(ciphertext.length);
+	      var block = createArray(16);
 
+	      for (var i = 0; i < ciphertext.length; i += 16) {
+	        copyArray(ciphertext, block, 0, i, i + 16);
+	        block = this._aes.decrypt(block);
 
-	    // STEP 6:  Update the ways with some metadata that will be useful for
-	    // walking the intersection graph later and rendering turn arrows.
+	        for (var j = 0; j < 16; j++) {
+	          plaintext[i + j] = block[j] ^ this._lastCipherblock[j];
+	        }
 
-	    function withMetadata(way, vertexIds) {
-	        var __oneWay = way.isOneWay();
+	        copyArray(ciphertext, this._lastCipherblock, 0, i, i + 16);
+	      }
 
-	        // which affixes are key vertices?
-	        var __first = (vertexIds.indexOf(way.first()) !== -1);
-	        var __last = (vertexIds.indexOf(way.last()) !== -1);
+	      return plaintext;
+	    };
+	    /**
+	     *  Mode Of Operation - Cipher Feedback (CFB)
+	     */
 
-	        // what roles is this way eligible for?
-	        var __via = (__first && __last);
-	        var __from = ((__first && !__oneWay) || __last);
-	        var __to = (__first || (__last && !__oneWay));
 
-	        return way.update({
-	            __first:  __first,
-	            __last:  __last,
-	            __from:  __from,
-	            __via: __via,
-	            __to:  __to,
-	            __oneWay:  __oneWay
-	        });
-	    }
+	    var ModeOfOperationCFB = function ModeOfOperationCFB(key, iv, segmentSize) {
+	      if (!(this instanceof ModeOfOperationCFB)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	    ways = [];
-	    wayIds.forEach(function(id) {
-	        var way = withMetadata(vgraph.entity(id), vertexIds);
-	        vgraph = vgraph.replace(way);
-	        ways.push(way);
-	    });
+	      this.description = "Cipher Feedback";
+	      this.name = "cfb";
 
+	      if (!iv) {
+	        iv = createArray(16);
+	      } else if (iv.length != 16) {
+	        throw new Error('invalid initialation vector size (must be 16 size)');
+	      }
 
-	    // STEP 7:  Simplify - This is an iterative process where we:
-	    //  1. Find trivial vertices with only 2 parents
-	    //  2. trim off the leaf way from those vertices and remove from vgraph
+	      if (!segmentSize) {
+	        segmentSize = 1;
+	      }
 
-	    var keepGoing;
-	    var removeWayIds = [];
-	    var removeVertexIds = [];
+	      this.segmentSize = segmentSize;
+	      this._shiftRegister = coerceArray(iv, true);
+	      this._aes = new AES(key);
+	    };
 
-	    do {
-	        keepGoing = false;
-	        checkVertices = vertexIds.slice();
+	    ModeOfOperationCFB.prototype.encrypt = function (plaintext) {
+	      if (plaintext.length % this.segmentSize != 0) {
+	        throw new Error('invalid plaintext size (must be segmentSize bytes)');
+	      }
 
-	        for (i = 0; i < checkVertices.length; i++) {
-	            var vertexId = checkVertices[i];
-	            vertex = vgraph.hasEntity(vertexId);
+	      var encrypted = coerceArray(plaintext, true);
+	      var xorSegment;
 
-	            if (!vertex) {
-	                if (vertexIds.indexOf(vertexId) !== -1) {
-	                    vertexIds.splice(vertexIds.indexOf(vertexId), 1);   // stop checking this one
-	                }
-	                removeVertexIds.push(vertexId);
-	                continue;
-	            }
+	      for (var i = 0; i < encrypted.length; i += this.segmentSize) {
+	        xorSegment = this._aes.encrypt(this._shiftRegister);
 
-	            parents = vgraph.parentWays(vertex);
-	            if (parents.length < 3) {
-	                if (vertexIds.indexOf(vertexId) !== -1) {
-	                    vertexIds.splice(vertexIds.indexOf(vertexId), 1);   // stop checking this one
-	                }
-	            }
+	        for (var j = 0; j < this.segmentSize; j++) {
+	          encrypted[i + j] ^= xorSegment[j];
+	        } // Shift the register
 
-	            if (parents.length === 2) {     // vertex with 2 parents is trivial
-	                var a = parents[0];
-	                var b = parents[1];
-	                var aIsLeaf = a && !a.__via;
-	                var bIsLeaf = b && !b.__via;
-	                var leaf, survivor;
-
-	                if (aIsLeaf && !bIsLeaf) {
-	                    leaf = a;
-	                    survivor = b;
-	                } else if (!aIsLeaf && bIsLeaf) {
-	                    leaf = b;
-	                    survivor = a;
-	                }
 
-	                if (leaf && survivor) {
-	                    survivor = withMetadata(survivor, vertexIds);      // update survivor way
-	                    vgraph = vgraph.replace(survivor).remove(leaf);    // update graph
-	                    removeWayIds.push(leaf.id);
-	                    keepGoing = true;
-	                }
-	            }
+	        copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
+	        copyArray(encrypted, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
+	      }
 
-	            parents = vgraph.parentWays(vertex);
+	      return encrypted;
+	    };
 
-	            if (parents.length < 2) {     // vertex is no longer a key vertex
-	                if (vertexIds.indexOf(vertexId) !== -1) {
-	                    vertexIds.splice(vertexIds.indexOf(vertexId), 1);   // stop checking this one
-	                }
-	                removeVertexIds.push(vertexId);
-	                keepGoing = true;
-	            }
+	    ModeOfOperationCFB.prototype.decrypt = function (ciphertext) {
+	      if (ciphertext.length % this.segmentSize != 0) {
+	        throw new Error('invalid ciphertext size (must be segmentSize bytes)');
+	      }
 
-	            if (parents.length < 1) {     // vertex is no longer attached to anything
-	                vgraph = vgraph.remove(vertex);
-	            }
+	      var plaintext = coerceArray(ciphertext, true);
+	      var xorSegment;
 
-	        }
-	    } while (keepGoing);
+	      for (var i = 0; i < plaintext.length; i += this.segmentSize) {
+	        xorSegment = this._aes.encrypt(this._shiftRegister);
 
+	        for (var j = 0; j < this.segmentSize; j++) {
+	          plaintext[i + j] ^= xorSegment[j];
+	        } // Shift the register
 
-	    vertices = vertices
-	        .filter(function(vertex) { return removeVertexIds.indexOf(vertex.id) === -1; })
-	        .map(function(vertex) { return vgraph.entity(vertex.id); });
-	    ways = ways
-	        .filter(function(way) { return removeWayIds.indexOf(way.id) === -1; })
-	        .map(function(way) { return vgraph.entity(way.id); });
 
+	        copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
+	        copyArray(ciphertext, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
+	      }
 
-	    // OK!  Here is our intersection..
-	    var intersection = {
-	        graph: vgraph,
-	        actions: actions,
-	        vertices: vertices,
-	        ways: ways,
+	      return plaintext;
 	    };
+	    /**
+	     *  Mode Of Operation - Output Feedback (OFB)
+	     */
 
 
+	    var ModeOfOperationOFB = function ModeOfOperationOFB(key, iv) {
+	      if (!(this instanceof ModeOfOperationOFB)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	    // Get all the valid turns through this intersection given a starting way id.
-	    // This operates on the virtual graph for everything.
-	    //
-	    // Basically, walk through all possible paths from starting way,
-	    //   honoring the existing turn restrictions as we go (watch out for loops!)
-	    //
-	    // For each path found, generate and return a `osmTurn` datastructure.
-	    //
-	    intersection.turns = function(fromWayId, maxViaWay) {
-	        if (!fromWayId) { return []; }
-	        if (!maxViaWay) { maxViaWay = 0; }
-
-	        var vgraph = intersection.graph;
-	        var keyVertexIds = intersection.vertices.map(function(v) { return v.id; });
-
-	        var start = vgraph.entity(fromWayId);
-	        if (!start || !(start.__from || start.__via)) { return []; }
-
-	        // maxViaWay=0   from-*-to              (0 vias)
-	        // maxViaWay=1   from-*-via-*-to        (1 via max)
-	        // maxViaWay=2   from-*-via-*-via-*-to  (2 vias max)
-	        var maxPathLength = (maxViaWay * 2) + 3;
-	        var turns = [];
-
-	        step(start);
-	        return turns;
-
-
-	        // traverse the intersection graph and find all the valid paths
-	        function step(entity, currPath, currRestrictions, matchedRestriction) {
-	            currPath = (currPath || []).slice();  // shallow copy
-	            if (currPath.length >= maxPathLength) { return; }
-	            currPath.push(entity.id);
-	            currRestrictions = (currRestrictions || []).slice();  // shallow copy
-	            var i, j;
-
-	            if (entity.type === 'node') {
-	                var parents = vgraph.parentWays(entity);
-	                var nextWays = [];
-
-	                // which ways can we step into?
-	                for (i = 0; i < parents.length; i++) {
-	                    var way = parents[i];
-
-	                    // if next way is a oneway incoming to this vertex, skip
-	                    if (way.__oneWay && way.nodes[0] !== entity.id) { continue; }
-
-	                    // if we have seen it before (allowing for an initial u-turn), skip
-	                    if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) { continue; }
-
-	                    // Check all "current" restrictions (where we've already walked the `FROM`)
-	                    var restrict = undefined;
-	                    for (j = 0; j < currRestrictions.length; j++) {
-	                        var restriction = currRestrictions[j];
-	                        var f = restriction.memberByRole('from');
-	                        var v = restriction.membersByRole('via');
-	                        var t = restriction.memberByRole('to');
-	                        var isOnly = /^only_/.test(restriction.tags.restriction);
-
-	                        // Does the current path match this turn restriction?
-	                        var matchesFrom = (f.id === fromWayId);
-	                        var matchesViaTo = false;
-	                        var isAlongOnlyPath = false;
-
-	                        if (t.id === way.id) {     // match TO
-
-	                            if (v.length === 1 && v[0].type === 'node') {    // match VIA node
-	                                matchesViaTo = (v[0].id === entity.id && (
-	                                    (matchesFrom && currPath.length === 2) ||
-	                                    (!matchesFrom && currPath.length > 2)
-	                                ));
-
-	                            } else {                                         // match all VIA ways
-	                                var pathVias = [];
-	                                for (k = 2; k < currPath.length; k +=2 ) {   // k = 2 skips FROM
-	                                    pathVias.push(currPath[k]);              // (path goes way-node-way...)
-	                                }
-	                                var restrictionVias = [];
-	                                for (k = 0; k < v.length; k++) {
-	                                    if (v[k].type === 'way') {
-	                                        restrictionVias.push(v[k].id);
-	                                    }
-	                                }
-	                                var diff = utilArrayDifference(pathVias, restrictionVias);
-	                                matchesViaTo = !diff.length;
-	                            }
-
-	                        } else if (isOnly) {
-	                            for (k = 0; k < v.length; k++) {
-	                                // way doesn't match TO, but is one of the via ways along the path of an "only"
-	                                if (v[k].type === 'way' && v[k].id === way.id) {
-	                                    isAlongOnlyPath = true;
-	                                    break;
-	                                }
-	                            }
-	                        }
-
-	                        if (matchesViaTo) {
-	                            if (isOnly) {
-	                                restrict = { id: restriction.id, direct: matchesFrom, from: f.id, only: true, end: true };
-	                            } else {
-	                                restrict = { id: restriction.id, direct: matchesFrom, from: f.id, no: true, end: true };
-	                            }
-	                        } else {    // indirect - caused by a different nearby restriction
-	                            if (isAlongOnlyPath) {
-	                                restrict = { id: restriction.id, direct: false, from: f.id, only: true, end: false };
-	                            } else if (isOnly) {
-	                                restrict = { id: restriction.id, direct: false, from: f.id, no: true, end: true };
-	                            }
-	                        }
-
-	                        // stop looking if we find a "direct" restriction (matching FROM, VIA, TO)
-	                        if (restrict && restrict.direct)
-	                            { break; }
-	                    }
-
-	                    nextWays.push({ way: way, restrict: restrict });
-	                }
-
-	                nextWays.forEach(function(nextWay) {
-	                    step(nextWay.way, currPath, currRestrictions, nextWay.restrict);
-	                });
-
-
-	            } else {  // entity.type === 'way'
-	                if (currPath.length >= 3) {     // this is a "complete" path..
-	                    var turnPath = currPath.slice();   // shallow copy
+	      this.description = "Output Feedback";
+	      this.name = "ofb";
 
-	                    // an indirect restriction - only include the partial path (starting at FROM)
-	                    if (matchedRestriction && matchedRestriction.direct === false) {
-	                        for (i = 0; i < turnPath.length; i++) {
-	                            if (turnPath[i] === matchedRestriction.from) {
-	                                turnPath = turnPath.slice(i);
-	                                break;
-	                            }
-	                        }
-	                    }
+	      if (!iv) {
+	        iv = createArray(16);
+	      } else if (iv.length != 16) {
+	        throw new Error('invalid initialation vector size (must be 16 bytes)');
+	      }
 
-	                    var turn = pathToTurn(turnPath);
-	                    if (turn) {
-	                        if (matchedRestriction) {
-	                            turn.restrictionID = matchedRestriction.id;
-	                            turn.no = matchedRestriction.no;
-	                            turn.only = matchedRestriction.only;
-	                            turn.direct = matchedRestriction.direct;
-	                        }
-	                        turns.push(osmTurn(turn));
-	                    }
+	      this._lastPrecipher = coerceArray(iv, true);
+	      this._lastPrecipherIndex = 16;
+	      this._aes = new AES(key);
+	    };
 
-	                    if (currPath[0] === currPath[2]) { return; }   // if we made a u-turn - stop here
-	                }
+	    ModeOfOperationOFB.prototype.encrypt = function (plaintext) {
+	      var encrypted = coerceArray(plaintext, true);
 
-	                if (matchedRestriction && matchedRestriction.end) { return; }  // don't advance any further
+	      for (var i = 0; i < encrypted.length; i++) {
+	        if (this._lastPrecipherIndex === 16) {
+	          this._lastPrecipher = this._aes.encrypt(this._lastPrecipher);
+	          this._lastPrecipherIndex = 0;
+	        }
 
-	                // which nodes can we step into?
-	                var n1 = vgraph.entity(entity.first());
-	                var n2 = vgraph.entity(entity.last());
-	                var dist = geoSphericalDistance(n1.loc, n2.loc);
-	                var nextNodes = [];
+	        encrypted[i] ^= this._lastPrecipher[this._lastPrecipherIndex++];
+	      }
 
-	                if (currPath.length > 1) {
-	                    if (dist > maxDistance) { return; }   // the next node is too far
-	                    if (!entity.__via) { return; }        // this way is a leaf / can't be a via
-	                }
+	      return encrypted;
+	    }; // Decryption is symetric
 
-	                if (!entity.__oneWay &&                     // bidirectional..
-	                    keyVertexIds.indexOf(n1.id) !== -1 &&   // key vertex..
-	                    currPath.indexOf(n1.id) === -1) {       // haven't seen it yet..
-	                    nextNodes.push(n1);                     // can advance to first node
-	                }
-	                if (keyVertexIds.indexOf(n2.id) !== -1 &&   // key vertex..
-	                    currPath.indexOf(n2.id) === -1) {       // haven't seen it yet..
-	                    nextNodes.push(n2);                     // can advance to last node
-	                }
 
-	                nextNodes.forEach(function(nextNode) {
-	                    // gather restrictions FROM this way
-	                    var fromRestrictions = vgraph.parentRelations(entity).filter(function(r) {
-	                        if (!r.isRestriction()) { return false; }
-
-	                        var f = r.memberByRole('from');
-	                        if (!f || f.id !== entity.id) { return false; }
-
-	                        var isOnly = /^only_/.test(r.tags.restriction);
-	                        if (!isOnly) { return true; }
-
-	                        // `only_` restrictions only matter along the direction of the VIA - #4849
-	                        var isOnlyVia = false;
-	                        var v = r.membersByRole('via');
-	                        if (v.length === 1 && v[0].type === 'node') {   // via node
-	                            isOnlyVia = (v[0].id === nextNode.id);
-	                        } else {                                        // via way(s)
-	                            for (var i = 0; i < v.length; i++) {
-	                                if (v[i].type !== 'way') { continue; }
-	                                var viaWay = vgraph.entity(v[i].id);
-	                                if (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
-	                                    isOnlyVia = true;
-	                                    break;
-	                                }
-	                            }
-	                        }
-	                        return isOnlyVia;
-	                    });
+	    ModeOfOperationOFB.prototype.decrypt = ModeOfOperationOFB.prototype.encrypt;
+	    /**
+	     *  Counter object for CTR common mode of operation
+	     */
 
-	                    step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
-	                });
-	            }
-	        }
+	    var Counter = function Counter(initialValue) {
+	      if (!(this instanceof Counter)) {
+	        throw Error('Counter must be instanitated with `new`');
+	      } // We allow 0, but anything false-ish uses the default 1
 
 
-	        // assumes path is alternating way-node-way of odd length
-	        function pathToTurn(path) {
-	            if (path.length < 3) { return; }
-	            var fromWayId, fromNodeId, fromVertexId;
-	            var toWayId, toNodeId, toVertexId;
-	            var viaWayIds, viaNodeId, isUturn;
+	      if (initialValue !== 0 && !initialValue) {
+	        initialValue = 1;
+	      }
 
-	            fromWayId = path[0];
-	            toWayId = path[path.length - 1];
+	      if (typeof initialValue === 'number') {
+	        this._counter = createArray(16);
+	        this.setValue(initialValue);
+	      } else {
+	        this.setBytes(initialValue);
+	      }
+	    };
 
-	            if (path.length === 3 && fromWayId === toWayId) {  // u turn
-	                var way = vgraph.entity(fromWayId);
-	                if (way.__oneWay) { return null; }
+	    Counter.prototype.setValue = function (value) {
+	      if (typeof value !== 'number' || parseInt(value) != value) {
+	        throw new Error('invalid counter value (must be an integer)');
+	      } // We cannot safely handle numbers beyond the safe range for integers
 
-	                isUturn = true;
-	                viaNodeId = fromVertexId = toVertexId = path[1];
-	                fromNodeId = toNodeId = adjacentNode(fromWayId, viaNodeId);
 
-	            } else {
-	                isUturn = false;
-	                fromVertexId = path[1];
-	                fromNodeId = adjacentNode(fromWayId, fromVertexId);
-	                toVertexId = path[path.length - 2];
-	                toNodeId = adjacentNode(toWayId, toVertexId);
-
-	                if (path.length === 3) {
-	                    viaNodeId = path[1];
-	                } else {
-	                    viaWayIds = path.filter(function(entityId) { return entityId[0] === 'w'; });
-	                    viaWayIds = viaWayIds.slice(1, viaWayIds.length - 1);  // remove first, last
-	                }
-	            }
+	      if (value > Number.MAX_SAFE_INTEGER) {
+	        throw new Error('integer value out of safe range');
+	      }
 
-	            return {
-	                key:  path.join('_'),
-	                path: path,
-	                from: { node: fromNodeId, way:  fromWayId, vertex: fromVertexId },
-	                via:  { node: viaNodeId,  ways: viaWayIds },
-	                to:   { node: toNodeId,   way:  toWayId, vertex: toVertexId },
-	                u:    isUturn
-	            };
+	      for (var index = 15; index >= 0; --index) {
+	        this._counter[index] = value % 256;
+	        value = parseInt(value / 256);
+	      }
+	    };
 
+	    Counter.prototype.setBytes = function (bytes) {
+	      bytes = coerceArray(bytes, true);
 
-	            function adjacentNode(wayId, affixId) {
-	                var nodes = vgraph.entity(wayId).nodes;
-	                return affixId === nodes[0] ? nodes[1] : nodes[nodes.length - 2];
-	            }
-	        }
+	      if (bytes.length != 16) {
+	        throw new Error('invalid counter bytes size (must be 16 bytes)');
+	      }
 
+	      this._counter = bytes;
 	    };
 
-	    return intersection;
-	}
+	    Counter.prototype.increment = function () {
+	      for (var i = 15; i >= 0; i--) {
+	        if (this._counter[i] === 255) {
+	          this._counter[i] = 0;
+	        } else {
+	          this._counter[i]++;
+	          break;
+	        }
+	      }
+	    };
+	    /**
+	     *  Mode Of Operation - Counter (CTR)
+	     */
 
 
-	function osmInferRestriction(graph, turn, projection) {
-	    var fromWay = graph.entity(turn.from.way);
-	    var fromNode = graph.entity(turn.from.node);
-	    var fromVertex = graph.entity(turn.from.vertex);
-	    var toWay = graph.entity(turn.to.way);
-	    var toNode = graph.entity(turn.to.node);
-	    var toVertex = graph.entity(turn.to.vertex);
+	    var ModeOfOperationCTR = function ModeOfOperationCTR(key, counter) {
+	      if (!(this instanceof ModeOfOperationCTR)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	    var fromOneWay = (fromWay.tags.oneway === 'yes');
-	    var toOneWay = (toWay.tags.oneway === 'yes');
-	    var angle = (geoAngle(fromVertex, fromNode, projection) -
-	                geoAngle(toVertex, toNode, projection)) * 180 / Math.PI;
+	      this.description = "Counter";
+	      this.name = "ctr";
 
-	    while (angle < 0)
-	        { angle += 360; }
+	      if (!(counter instanceof Counter)) {
+	        counter = new Counter(counter);
+	      }
 
-	    if (fromNode === toNode)
-	        { return 'no_u_turn'; }
-	    if ((angle < 23 || angle > 336) && fromOneWay && toOneWay)
-	        { return 'no_u_turn'; }   // wider tolerance for u-turn if both ways are oneway
-	    if ((angle < 40 || angle > 319) && fromOneWay && toOneWay && turn.from.vertex !== turn.to.vertex)
-	        { return 'no_u_turn'; }   // even wider tolerance for u-turn if there is a via way (from !== to)
-	    if (angle < 158)
-	        { return 'no_right_turn'; }
-	    if (angle > 202)
-	        { return 'no_left_turn'; }
+	      this._counter = counter;
+	      this._remainingCounter = null;
+	      this._remainingCounterIndex = 16;
+	      this._aes = new AES(key);
+	    };
 
-	    return 'no_straight_on';
-	}
+	    ModeOfOperationCTR.prototype.encrypt = function (plaintext) {
+	      var encrypted = coerceArray(plaintext, true);
 
-	function actionMergePolygon(ids, newRelationId) {
+	      for (var i = 0; i < encrypted.length; i++) {
+	        if (this._remainingCounterIndex === 16) {
+	          this._remainingCounter = this._aes.encrypt(this._counter._counter);
+	          this._remainingCounterIndex = 0;
 
-	    function groupEntities(graph) {
-	        var entities = ids.map(function (id) { return graph.entity(id); });
-	        var geometryGroups = utilArrayGroupBy(entities, function(entity) {
-	            if (entity.type === 'way' && entity.isClosed()) {
-	                return 'closedWay';
-	            } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-	                return 'multipolygon';
-	            } else {
-	                return 'other';
-	            }
-	        });
+	          this._counter.increment();
+	        }
 
-	        return Object.assign(
-	            { closedWay: [], multipolygon: [], other: [] },
-	            geometryGroups
-	        );
-	    }
+	        encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
+	      }
 
+	      return encrypted;
+	    }; // Decryption is symetric
 
-	    var action = function(graph) {
-	        var entities = groupEntities(graph);
 
-	        // An array representing all the polygons that are part of the multipolygon.
-	        //
-	        // Each element is itself an array of objects with an id property, and has a
-	        // locs property which is an array of the locations forming the polygon.
-	        var polygons = entities.multipolygon.reduce(function(polygons, m) {
-	            return polygons.concat(osmJoinWays(m.members, graph));
-	        }, []).concat(entities.closedWay.map(function(d) {
-	            var member = [{id: d.id}];
-	            member.nodes = graph.childNodes(d);
-	            return member;
-	        }));
+	    ModeOfOperationCTR.prototype.decrypt = ModeOfOperationCTR.prototype.encrypt; ///////////////////////
+	    // Padding
+	    // See:https://tools.ietf.org/html/rfc2315
 
-	        // contained is an array of arrays of boolean values,
-	        // where contained[j][k] is true iff the jth way is
-	        // contained by the kth way.
-	        var contained = polygons.map(function(w, i) {
-	            return polygons.map(function(d, n) {
-	                if (i === n) { return null; }
-	                return geoPolygonContainsPolygon(
-	                    d.nodes.map(function(n) { return n.loc; }),
-	                    w.nodes.map(function(n) { return n.loc; })
-	                );
-	            });
-	        });
+	    function pkcs7pad(data) {
+	      data = coerceArray(data, true);
+	      var padder = 16 - data.length % 16;
+	      var result = createArray(data.length + padder);
+	      copyArray(data, result);
 
-	        // Sort all polygons as either outer or inner ways
-	        var members = [];
-	        var outer = true;
+	      for (var i = data.length; i < result.length; i++) {
+	        result[i] = padder;
+	      }
 
-	        while (polygons.length) {
-	            extractUncontained(polygons);
-	            polygons = polygons.filter(isContained);
-	            contained = contained.filter(isContained).map(filterContained);
-	        }
+	      return result;
+	    }
 
-	        function isContained(d, i) {
-	            return contained[i].some(function(val) { return val; });
-	        }
+	    function pkcs7strip(data) {
+	      data = coerceArray(data, true);
 
-	        function filterContained(d) {
-	            return d.filter(isContained);
-	        }
+	      if (data.length < 16) {
+	        throw new Error('PKCS#7 invalid length');
+	      }
 
-	        function extractUncontained(polygons) {
-	            polygons.forEach(function(d, i) {
-	                if (!isContained(d, i)) {
-	                    d.forEach(function(member) {
-	                        members.push({
-	                            type: 'way',
-	                            id: member.id,
-	                            role: outer ? 'outer' : 'inner'
-	                        });
-	                    });
-	                }
-	            });
-	            outer = !outer;
-	        }
+	      var padder = data[data.length - 1];
 
-	        // Move all tags to one relation
-	        var relation = entities.multipolygon[0] ||
-	            osmRelation({ id: newRelationId, tags: { type: 'multipolygon' }});
+	      if (padder > 16) {
+	        throw new Error('PKCS#7 padding byte out of range');
+	      }
 
-	        entities.multipolygon.slice(1).forEach(function(m) {
-	            relation = relation.mergeTags(m.tags);
-	            graph = graph.remove(m);
-	        });
+	      var length = data.length - padder;
 
-	        entities.closedWay.forEach(function(way) {
-	            function isThisOuter(m) {
-	                return m.id === way.id && m.role !== 'inner';
-	            }
-	            if (members.some(isThisOuter)) {
-	                relation = relation.mergeTags(way.tags);
-	                graph = graph.replace(way.update({ tags: {} }));
-	            }
-	        });
+	      for (var i = 0; i < padder; i++) {
+	        if (data[length + i] !== padder) {
+	          throw new Error('PKCS#7 invalid padding byte');
+	        }
+	      }
 
-	        return graph.replace(relation.update({
-	            members: members,
-	            tags: utilObjectOmit(relation.tags, ['area'])
-	        }));
-	    };
+	      var result = createArray(length);
+	      copyArray(data, result, 0, 0, length);
+	      return result;
+	    } ///////////////////////
+	    // Exporting
+	    // The block cipher
 
 
-	    action.disabled = function(graph) {
-	        var entities = groupEntities(graph);
-	        if (entities.other.length > 0 ||
-	            entities.closedWay.length + entities.multipolygon.length < 2) {
-	            return 'not_eligible';
-	        }
-	        if (!entities.multipolygon.every(function(r) { return r.isComplete(graph); })) {
-	            return 'incomplete_relation';
+	    var aesjs = {
+	      AES: AES,
+	      Counter: Counter,
+	      ModeOfOperation: {
+	        ecb: ModeOfOperationECB,
+	        cbc: ModeOfOperationCBC,
+	        cfb: ModeOfOperationCFB,
+	        ofb: ModeOfOperationOFB,
+	        ctr: ModeOfOperationCTR
+	      },
+	      utils: {
+	        hex: convertHex,
+	        utf8: convertUtf8
+	      },
+	      padding: {
+	        pkcs7: {
+	          pad: pkcs7pad,
+	          strip: pkcs7strip
 	        }
+	      },
+	      _arrayTest: {
+	        coerceArray: coerceArray,
+	        createArray: createArray,
+	        copyArray: copyArray
+	      }
+	    }; // node.js
 
-	        if (!entities.multipolygon.length) {
-	            var sharedMultipolygons = [];
-	            entities.closedWay.forEach(function(way, i) {
-	                if (i === 0) {
-	                    sharedMultipolygons = graph.parentMultipolygons(way);
-	                } else {
-	                    sharedMultipolygons = utilArrayIntersection(sharedMultipolygons, graph.parentMultipolygons(way));
-	                }
-	            });
-	            sharedMultipolygons = sharedMultipolygons.filter(function(relation) {
-	                return relation.members.length === entities.closedWay.length;
-	            });
-	            if (sharedMultipolygons.length) {
-	                // don't create a new multipolygon if it'd be redundant
-	                return 'not_eligible';
-	            }
-	        } else if (entities.closedWay.some(function(way) {
-	                return utilArrayIntersection(graph.parentMultipolygons(way), entities.multipolygon).length;
-	            })) {
-	            // don't add a way to a multipolygon again if it's already a member
-	            return 'not_eligible';
-	        }
-	    };
+	    {
+	      module.exports = aesjs; // RequireJS/AMD
+	      // http://www.requirejs.org/docs/api.html
+	      // https://github.com/amdjs/amdjs-api/wiki/AMD
+	    }
+	  })();
+	})(aesJs);
 
+	var aesjs = aesJs.exports;
 
-	    return action;
-	}
+	// We can use keys that are 128 bits (16 bytes), 192 bits (24 bytes) or 256 bits (32 bytes).
+	// To generate a random key:  window.crypto.getRandomValues(new Uint8Array(16));
+	// This default signing key is built into iD and can be used to mask/unmask sensitive values.
 
-	// do not edit .js files directly - edit src/index.jst
+	var DEFAULT_128 = [250, 157, 60, 79, 142, 134, 229, 129, 138, 126, 210, 129, 29, 71, 160, 208];
+	function utilAesEncrypt(text, key) {
+	  key = key || DEFAULT_128;
+	  var textBytes = aesjs.utils.utf8.toBytes(text);
+	  var aesCtr = new aesjs.ModeOfOperation.ctr(key);
+	  var encryptedBytes = aesCtr.encrypt(textBytes);
+	  var encryptedHex = aesjs.utils.hex.fromBytes(encryptedBytes);
+	  return encryptedHex;
+	}
+	function utilAesDecrypt(encryptedHex, key) {
+	  key = key || DEFAULT_128;
+	  var encryptedBytes = aesjs.utils.hex.toBytes(encryptedHex);
+	  var aesCtr = new aesjs.ModeOfOperation.ctr(key);
+	  var decryptedBytes = aesCtr.decrypt(encryptedBytes);
+	  var text = aesjs.utils.utf8.fromBytes(decryptedBytes);
+	  return text;
+	}
 
+	function utilCleanTags(tags) {
+	  var out = {};
 
+	  for (var k in tags) {
+	    if (!k) continue;
+	    var v = tags[k];
 
-	var fastDeepEqual = function equal(a, b) {
-	  if (a === b) { return true; }
+	    if (v !== undefined) {
+	      out[k] = cleanValue(k, v);
+	    }
+	  }
 
-	  if (a && b && typeof a == 'object' && typeof b == 'object') {
-	    if (a.constructor !== b.constructor) { return false; }
+	  return out;
 
-	    var length, i, keys;
-	    if (Array.isArray(a)) {
-	      length = a.length;
-	      if (length != b.length) { return false; }
-	      for (i = length; i-- !== 0;)
-	        { if (!equal(a[i], b[i])) { return false; } }
-	      return true;
+	  function cleanValue(k, v) {
+	    function keepSpaces(k) {
+	      return /_hours|_times|:conditional$/.test(k);
 	    }
 
+	    function skip(k) {
+	      return /^(description|note|fixme)$/.test(k);
+	    }
 
+	    if (skip(k)) return v;
+	    var cleaned = v.split(';').map(function (s) {
+	      return s.trim();
+	    }).join(keepSpaces(k) ? '; ' : ';'); // The code below is not intended to validate websites and emails.
+	    // It is only intended to prevent obvious copy-paste errors. (#2323)
+	    // clean website- and email-like tags
 
-	    if (a.constructor === RegExp) { return a.source === b.source && a.flags === b.flags; }
-	    if (a.valueOf !== Object.prototype.valueOf) { return a.valueOf() === b.valueOf(); }
-	    if (a.toString !== Object.prototype.toString) { return a.toString() === b.toString(); }
+	    if (k.indexOf('website') !== -1 || k.indexOf('email') !== -1 || cleaned.indexOf('http') === 0) {
+	      cleaned = cleaned.replace(/[\u200B-\u200F\uFEFF]/g, ''); // strip LRM and other zero width chars
+	    }
 
-	    keys = Object.keys(a);
-	    length = keys.length;
-	    if (length !== Object.keys(b).length) { return false; }
+	    return cleaned;
+	  }
+	}
 
-	    for (i = length; i-- !== 0;)
-	      { if (!Object.prototype.hasOwnProperty.call(b, keys[i])) { return false; } }
+	var _detected;
 
-	    for (i = length; i-- !== 0;) {
-	      var key = keys[i];
+	function utilDetect(refresh) {
+	  if (_detected && !refresh) return _detected;
+	  _detected = {};
+	  var ua = navigator.userAgent;
+	  var m = null;
+	  /* Browser */
 
-	      if (!equal(a[key], b[key])) { return false; }
-	    }
+	  m = ua.match(/(edge)\/?\s*(\.?\d+(\.\d+)*)/i); // Edge
 
-	    return true;
+	  if (m !== null) {
+	    _detected.browser = m[1];
+	    _detected.version = m[2];
 	  }
 
-	  // true if both NaN, false otherwise
-	  return a!==a && b!==b;
-	};
-
-	// Text diff algorithm following Hunt and McIlroy 1976.
-	// J. W. Hunt and M. D. McIlroy, An algorithm for differential buffer
-	// comparison, Bell Telephone Laboratories CSTR #41 (1976)
-	// http://www.cs.dartmouth.edu/~doug/
-	// https://en.wikipedia.org/wiki/Longest_common_subsequence_problem
-	//
-	// Expects two arrays, finds longest common sequence
-	function LCS(buffer1, buffer2) {
+	  if (!_detected.browser) {
+	    m = ua.match(/Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/i); // IE11
 
-	  var equivalenceClasses = {};
-	  for (var j = 0; j < buffer2.length; j++) {
-	    var item = buffer2[j];
-	    if (equivalenceClasses[item]) {
-	      equivalenceClasses[item].push(j);
-	    } else {
-	      equivalenceClasses[item] = [j];
+	    if (m !== null) {
+	      _detected.browser = 'msie';
+	      _detected.version = m[1];
 	    }
 	  }
 
-	  var NULLRESULT = { buffer1index: -1, buffer2index: -1, chain: null };
-	  var candidates = [NULLRESULT];
-
-	  for (var i = 0; i < buffer1.length; i++) {
-	    var item$1 = buffer1[i];
-	    var buffer2indices = equivalenceClasses[item$1] || [];
-	    var r = 0;
-	    var c = candidates[0];
+	  if (!_detected.browser) {
+	    m = ua.match(/(opr)\/?\s*(\.?\d+(\.\d+)*)/i); // Opera 15+
 
-	    for (var jx = 0; jx < buffer2indices.length; jx++) {
-	      var j$1 = buffer2indices[jx];
+	    if (m !== null) {
+	      _detected.browser = 'Opera';
+	      _detected.version = m[2];
+	    }
+	  }
 
-	      var s = (void 0);
-	      for (s = r; s < candidates.length; s++) {
-	        if ((candidates[s].buffer2index < j$1) && ((s === candidates.length - 1) || (candidates[s + 1].buffer2index > j$1))) {
-	          break;
-	        }
-	      }
+	  if (!_detected.browser) {
+	    m = ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);
 
-	      if (s < candidates.length) {
-	        var newCandidate = { buffer1index: i, buffer2index: j$1, chain: candidates[s] };
-	        if (r === candidates.length) {
-	          candidates.push(c);
-	        } else {
-	          candidates[r] = c;
-	        }
-	        r = s + 1;
-	        c = newCandidate;
-	        if (r === candidates.length) {
-	          break; // no point in examining further (j)s
-	        }
-	      }
+	    if (m !== null) {
+	      _detected.browser = m[1];
+	      _detected.version = m[2];
+	      m = ua.match(/version\/([\.\d]+)/i);
+	      if (m !== null) _detected.version = m[1];
 	    }
-
-	    candidates[r] = c;
 	  }
 
-	  // At this point, we know the LCS: it's in the reverse of the
-	  // linked-list through .chain of candidates[candidates.length - 1].
-
-	  return candidates[candidates.length - 1];
-	}
+	  if (!_detected.browser) {
+	    _detected.browser = navigator.appName;
+	    _detected.version = navigator.appVersion;
+	  } // keep major.minor version only..
 
 
-	// We apply the LCS to give a simple representation of the
-	// offsets and lengths of mismatched chunks in the input
-	// buffers. This is used by diff3MergeRegions.
-	function diffIndices(buffer1, buffer2) {
-	  var lcs = LCS(buffer1, buffer2);
-	  var result = [];
-	  var tail1 = buffer1.length;
-	  var tail2 = buffer2.length;
+	  _detected.version = _detected.version.split(/\W/).slice(0, 2).join('.'); // detect other browser capabilities
+	  // Legacy Opera has incomplete svg style support. See #715
 
-	  for (var candidate = lcs; candidate !== null; candidate = candidate.chain) {
-	    var mismatchLength1 = tail1 - candidate.buffer1index - 1;
-	    var mismatchLength2 = tail2 - candidate.buffer2index - 1;
-	    tail1 = candidate.buffer1index;
-	    tail2 = candidate.buffer2index;
+	  _detected.opera = _detected.browser.toLowerCase() === 'opera' && parseFloat(_detected.version) < 15;
 
-	    if (mismatchLength1 || mismatchLength2) {
-	      result.push({
-	        buffer1: [tail1 + 1, mismatchLength1],
-	        buffer1Content: buffer1.slice(tail1 + 1, tail1 + 1 + mismatchLength1),
-	        buffer2: [tail2 + 1, mismatchLength2],
-	        buffer2Content: buffer2.slice(tail2 + 1, tail2 + 1 + mismatchLength2)
-	      });
-	    }
+	  if (_detected.browser.toLowerCase() === 'msie') {
+	    _detected.ie = true;
+	    _detected.browser = 'Internet Explorer';
+	    _detected.support = parseFloat(_detected.version) >= 11;
+	  } else {
+	    _detected.ie = false;
+	    _detected.support = true;
 	  }
 
-	  result.reverse();
-	  return result;
-	}
-
-
-	// Given three buffers, A, O, and B, where both A and B are
-	// independently derived from O, returns a fairly complicated
-	// internal representation of merge decisions it's taken. The
-	// interested reader may wish to consult
-	//
-	// Sanjeev Khanna, Keshav Kunal, and Benjamin C. Pierce.
-	// 'A Formal Investigation of ' In Arvind and Prasad,
-	// editors, Foundations of Software Technology and Theoretical
-	// Computer Science (FSTTCS), December 2007.
-	//
-	// (http://www.cis.upenn.edu/~bcpierce/papers/diff3-short.pdf)
-	//
-	function diff3MergeRegions(a, o, b) {
+	  _detected.filedrop = window.FileReader && 'ondrop' in window;
+	  _detected.download = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
+	  _detected.cssfilters = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
+	  /* Platform */
 
-	  // "hunks" are array subsets where `a` or `b` are different from `o`
-	  // https://www.gnu.org/software/diffutils/manual/html_node/diff3-Hunks.html
-	  var hunks = [];
-	  function addHunk(h, ab) {
-	    hunks.push({
-	      ab: ab,
-	      oStart: h.buffer1[0],
-	      oLength: h.buffer1[1],   // length of o to remove
-	      abStart: h.buffer2[0],
-	      abLength: h.buffer2[1]   // length of a/b to insert
-	      // abContent: (ab === 'a' ? a : b).slice(h.buffer2[0], h.buffer2[0] + h.buffer2[1])
-	    });
+	  if (/Win/.test(ua)) {
+	    _detected.os = 'win';
+	    _detected.platform = 'Windows';
+	  } else if (/Mac/.test(ua)) {
+	    _detected.os = 'mac';
+	    _detected.platform = 'Macintosh';
+	  } else if (/X11/.test(ua) || /Linux/.test(ua)) {
+	    _detected.os = 'linux';
+	    _detected.platform = 'Linux';
+	  } else {
+	    _detected.os = 'win';
+	    _detected.platform = 'Unknown';
 	  }
 
-	  diffIndices(o, a).forEach(function (item) { return addHunk(item, 'a'); });
-	  diffIndices(o, b).forEach(function (item) { return addHunk(item, 'b'); });
-	  hunks.sort(function (x,y) { return x.oStart - y.oStart; });
+	  _detected.isMobileWebKit = (/\b(iPad|iPhone|iPod)\b/.test(ua) || // HACK: iPadOS 13+ requests desktop sites by default by using a Mac user agent,
+	  // so assume any "mac" with multitouch is actually iOS
+	  navigator.platform === 'MacIntel' && 'maxTouchPoints' in navigator && navigator.maxTouchPoints > 1) && /WebKit/.test(ua) && !/Edge/.test(ua) && !window.MSStream;
+	  /* Locale */
+	  // An array of locales requested by the browser in priority order.
 
-	  var results = [];
-	  var currOffset = 0;
+	  _detected.browserLocales = Array.from(new Set( // remove duplicates
+	  [navigator.language].concat(navigator.languages || []).concat([// old property for backwards compatibility
+	  navigator.userLanguage]) // remove any undefined values
+	  .filter(Boolean)));
+	  /* Host */
 
-	  function advanceTo(endOffset) {
-	    if (endOffset > currOffset) {
-	      results.push({
-	        stable: true,
-	        buffer: 'o',
-	        bufferStart: currOffset,
-	        bufferLength: endOffset - currOffset,
-	        bufferContent: o.slice(currOffset, endOffset)
-	      });
-	      currOffset = endOffset;
-	    }
+	  var loc = window.top.location;
+	  var origin = loc.origin;
+
+	  if (!origin) {
+	    // for unpatched IE11
+	    origin = loc.protocol + '//' + loc.hostname + (loc.port ? ':' + loc.port : '');
 	  }
 
-	  while (hunks.length) {
-	    var hunk = hunks.shift();
-	    var regionStart = hunk.oStart;
-	    var regionEnd = hunk.oStart + hunk.oLength;
-	    var regionHunks = [hunk];
-	    advanceTo(regionStart);
+	  _detected.host = origin + loc.pathname;
+	  return _detected;
+	}
 
-	    // Try to pull next overlapping hunk into this region
-	    while (hunks.length) {
-	      var nextHunk = hunks[0];
-	      var nextHunkStart = nextHunk.oStart;
-	      if (nextHunkStart > regionEnd) { break; }   // no overlap
+	// Like selection.property('value', ...), but avoids no-op value sets,
+	// which can result in layout/repaint thrashing in some situations.
 
-	      regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
-	      regionHunks.push(hunks.shift());
+	/** @returns {string} */
+	function utilGetSetValue(selection, value) {
+	  function d3_selection_value(value) {
+	    function valueNull() {
+	      delete this.value;
 	    }
 
-	    if (regionHunks.length === 1) {
-	      // Only one hunk touches this region, meaning that there is no conflict here.
-	      // Either `a` or `b` is inserting into a region of `o` unchanged by the other.
-	      if (hunk.abLength > 0) {
-	        var buffer = (hunk.ab === 'a' ? a : b);
-	        results.push({
-	          stable: true,
-	          buffer: hunk.ab,
-	          bufferStart: hunk.abStart,
-	          bufferLength: hunk.abLength,
-	          bufferContent: buffer.slice(hunk.abStart, hunk.abStart + hunk.abLength)
-	        });
-	      }
-	    } else {
-	      // A true a/b conflict. Determine the bounds involved from `a`, `o`, and `b`.
-	      // Effectively merge all the `a` hunks into one giant hunk, then do the
-	      // same for the `b` hunks; then, correct for skew in the regions of `o`
-	      // that each side changed, and report appropriate spans for the three sides.
-	      var bounds = {
-	        a: [a.length, -1, o.length, -1],
-	        b: [b.length, -1, o.length, -1]
-	      };
-	      while (regionHunks.length) {
-	        hunk = regionHunks.shift();
-	        var oStart = hunk.oStart;
-	        var oEnd = oStart + hunk.oLength;
-	        var abStart = hunk.abStart;
-	        var abEnd = abStart + hunk.abLength;
-	        var b$1 = bounds[hunk.ab];
-	        b$1[0] = Math.min(abStart, b$1[0]);
-	        b$1[1] = Math.max(abEnd, b$1[1]);
-	        b$1[2] = Math.min(oStart, b$1[2]);
-	        b$1[3] = Math.max(oEnd, b$1[3]);
+	    function valueConstant() {
+	      if (this.value !== value) {
+	        this.value = value;
 	      }
+	    }
 
-	      var aStart = bounds.a[0] + (regionStart - bounds.a[2]);
-	      var aEnd = bounds.a[1] + (regionEnd - bounds.a[3]);
-	      var bStart = bounds.b[0] + (regionStart - bounds.b[2]);
-	      var bEnd = bounds.b[1] + (regionEnd - bounds.b[3]);
+	    function valueFunction() {
+	      var x = value.apply(this, arguments);
 
-	      var result = {
-	        stable: false,
-	        aStart: aStart,
-	        aLength: aEnd - aStart,
-	        aContent: a.slice(aStart, aEnd),
-	        oStart: regionStart,
-	        oLength: regionEnd - regionStart,
-	        oContent: o.slice(regionStart, regionEnd),
-	        bStart: bStart,
-	        bLength: bEnd - bStart,
-	        bContent: b.slice(bStart, bEnd)
-	      };
-	      results.push(result);
+	      if (x === null || x === undefined) {
+	        delete this.value;
+	      } else if (this.value !== x) {
+	        this.value = x;
+	      }
 	    }
-	    currOffset = regionEnd;
+
+	    return value === null || value === undefined ? valueNull : typeof value === 'function' ? valueFunction : valueConstant;
 	  }
 
-	  advanceTo(o.length);
+	  if (arguments.length === 1) {
+	    return selection.property('value');
+	  }
 
-	  return results;
+	  return selection.each(d3_selection_value(value));
 	}
 
+	function utilKeybinding(namespace) {
+	  var _keybindings = {};
 
-	// Applies the output of diff3MergeRegions to actually
-	// construct the merged buffer; the returned result alternates
-	// between 'ok' and 'conflict' blocks.
-	// A "false conflict" is where `a` and `b` both change the same from `o`
-	function diff3Merge(a, o, b, options) {
-	  var defaults = {
-	    excludeFalseConflicts: true,
-	    stringSeparator: /\s+/
-	  };
-	  options = Object.assign(defaults, options);
+	  function testBindings(d3_event, isCapturing) {
+	    var didMatch = false;
+	    var bindings = Object.keys(_keybindings).map(function (id) {
+	      return _keybindings[id];
+	    });
+	    var i, binding; // Most key shortcuts will accept either lower or uppercase ('h' or 'H'),
+	    // so we don't strictly match on the shift key, but we prioritize
+	    // shifted keybindings first, and fallback to unshifted only if no match.
+	    // (This lets us differentiate between '←'/'⇧←' or '⌘Z'/'⌘⇧Z')
+	    // priority match shifted keybindings first
 
-	  var aString = (typeof a === 'string');
-	  var oString = (typeof o === 'string');
-	  var bString = (typeof b === 'string');
+	    for (i = 0; i < bindings.length; i++) {
+	      binding = bindings[i];
+	      if (!binding.event.modifiers.shiftKey) continue; // no shift
 
-	  if (aString) { a = a.split(options.stringSeparator); }
-	  if (oString) { o = o.split(options.stringSeparator); }
-	  if (bString) { b = b.split(options.stringSeparator); }
+	      if (!!binding.capture !== isCapturing) continue;
 
-	  var results = [];
-	  var regions = diff3MergeRegions(a, o, b);
+	      if (matches(d3_event, binding, true)) {
+	        binding.callback(d3_event);
+	        didMatch = true; // match a max of one binding per event
 
-	  var okBuffer = [];
-	  function flushOk() {
-	    if (okBuffer.length) {
-	      results.push({ ok: okBuffer });
+	        break;
+	      }
 	    }
-	    okBuffer = [];
-	  }
 
-	  function isFalseConflict(a, b) {
-	    if (a.length !== b.length) { return false; }
-	    for (var i = 0; i < a.length; i++) {
-	      if (a[i] !== b[i]) { return false; }
-	    }
-	    return true;
-	  }
+	    if (didMatch) return; // then unshifted keybindings
 
-	  regions.forEach(function (region) {
-	    if (region.stable) {
-	      okBuffer.push.apply(okBuffer, region.bufferContent);
-	    } else {
-	      if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
-	        okBuffer.push.apply(okBuffer, region.aContent);
-	      } else {
-	        flushOk();
-	        results.push({
-	          conflict: {
-	            a: region.aContent,
-	            aIndex: region.aStart,
-	            o: region.oContent,
-	            oIndex: region.oStart,
-	            b: region.bContent,
-	            bIndex: region.bStart
-	          }
-	        });
+	    for (i = 0; i < bindings.length; i++) {
+	      binding = bindings[i];
+	      if (binding.event.modifiers.shiftKey) continue; // shift
+
+	      if (!!binding.capture !== isCapturing) continue;
+
+	      if (matches(d3_event, binding, false)) {
+	        binding.callback(d3_event);
+	        break;
 	      }
 	    }
-	  });
 
-	  flushOk();
-	  return results;
-	}
+	    function matches(d3_event, binding, testShift) {
+	      var event = d3_event;
+	      var isMatch = false;
+	      var tryKeyCode = true; // Prefer a match on `KeyboardEvent.key`
 
-	function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
-	    discardTags = discardTags || {};
-	    var _option = 'safe';  // 'safe', 'force_local', 'force_remote'
-	    var _conflicts = [];
+	      if (event.key !== undefined) {
+	        tryKeyCode = event.key.charCodeAt(0) > 255; // outside ISO-Latin-1
 
+	        isMatch = true;
 
-	    function user(d) {
-	        return (typeof formatUser === 'function') ? formatUser(d) : d;
-	    }
+	        if (binding.event.key === undefined) {
+	          isMatch = false;
+	        } else if (Array.isArray(binding.event.key)) {
+	          if (binding.event.key.map(function (s) {
+	            return s.toLowerCase();
+	          }).indexOf(event.key.toLowerCase()) === -1) {
+	            isMatch = false;
+	          }
+	        } else {
+	          if (event.key.toLowerCase() !== binding.event.key.toLowerCase()) {
+	            isMatch = false;
+	          }
+	        }
+	      } // Fallback match on `KeyboardEvent.keyCode`, can happen if:
+	      // - browser doesn't support `KeyboardEvent.key`
+	      // - `KeyboardEvent.key` is outside ISO-Latin-1 range (cyrillic?)
 
 
-	    function mergeLocation(remote, target) {
-	        function pointEqual(a, b) {
-	            var epsilon = 1e-6;
-	            return (Math.abs(a[0] - b[0]) < epsilon) && (Math.abs(a[1] - b[1]) < epsilon);
-	        }
+	      if (!isMatch && tryKeyCode) {
+	        isMatch = event.keyCode === binding.event.keyCode;
+	      }
 
-	        if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
-	            return target;
-	        }
-	        if (_option === 'force_remote') {
-	            return target.update({loc: remote.loc});
-	        }
+	      if (!isMatch) return false; // test modifier keys
+
+	      if (!(event.ctrlKey && event.altKey)) {
+	        // if both are set, assume AltGr and skip it - #4096
+	        if (event.ctrlKey !== binding.event.modifiers.ctrlKey) return false;
+	        if (event.altKey !== binding.event.modifiers.altKey) return false;
+	      }
 
-	        _conflicts.push(_t('merge_remote_changes.conflict.location', { user: user(remote.user) }));
-	        return target;
+	      if (event.metaKey !== binding.event.modifiers.metaKey) return false;
+	      if (testShift && event.shiftKey !== binding.event.modifiers.shiftKey) return false;
+	      return true;
 	    }
+	  }
+
+	  function capture(d3_event) {
+	    testBindings(d3_event, true);
+	  }
 
+	  function bubble(d3_event) {
+	    var tagName = select(d3_event.target).node().tagName;
 
-	    function mergeNodes(base, remote, target) {
-	        if (_option === 'force_local' || fastDeepEqual(target.nodes, remote.nodes)) {
-	            return target;
-	        }
-	        if (_option === 'force_remote') {
-	            return target.update({nodes: remote.nodes});
-	        }
+	    if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
+	      return;
+	    }
 
-	        var ccount = _conflicts.length;
-	        var o = base.nodes || [];
-	        var a = target.nodes || [];
-	        var b = remote.nodes || [];
-	        var nodes = [];
-	        var hunks = diff3Merge(a, o, b, { excludeFalseConflicts: true });
+	    testBindings(d3_event, false);
+	  }
 
-	        for (var i = 0; i < hunks.length; i++) {
-	            var hunk = hunks[i];
-	            if (hunk.ok) {
-	                nodes.push.apply(nodes, hunk.ok);
-	            } else {
-	                // for all conflicts, we can assume c.a !== c.b
-	                // because `diff3Merge` called with `true` option to exclude false conflicts..
-	                var c = hunk.conflict;
-	                if (fastDeepEqual(c.o, c.a)) {  // only changed remotely
-	                    nodes.push.apply(nodes, c.b);
-	                } else if (fastDeepEqual(c.o, c.b)) {  // only changed locally
-	                    nodes.push.apply(nodes, c.a);
-	                } else {       // changed both locally and remotely
-	                    _conflicts.push(_t('merge_remote_changes.conflict.nodelist', { user: user(remote.user) }));
-	                    break;
-	                }
-	            }
-	        }
+	  function keybinding(selection) {
+	    selection = selection || select(document);
+	    selection.on('keydown.capture.' + namespace, capture, true);
+	    selection.on('keydown.bubble.' + namespace, bubble, false);
+	    return keybinding;
+	  } // was: keybinding.off()
 
-	        return (_conflicts.length === ccount) ? target.update({nodes: nodes}) : target;
-	    }
 
+	  keybinding.unbind = function (selection) {
+	    _keybindings = [];
+	    selection = selection || select(document);
+	    selection.on('keydown.capture.' + namespace, null);
+	    selection.on('keydown.bubble.' + namespace, null);
+	    return keybinding;
+	  };
 
-	    function mergeChildren(targetWay, children, updates, graph) {
-	        function isUsed(node, targetWay) {
-	            var hasInterestingParent = graph.parentWays(node)
-	                .some(function(way) { return way.id !== targetWay.id; });
+	  keybinding.clear = function () {
+	    _keybindings = {};
+	    return keybinding;
+	  }; // Remove one or more keycode bindings.
 
-	            return node.hasInterestingTags() ||
-	                hasInterestingParent ||
-	                graph.parentRelations(node).length > 0;
-	        }
 
-	        var ccount = _conflicts.length;
+	  keybinding.off = function (codes, capture) {
+	    var arr = utilArrayUniq([].concat(codes));
 
-	        for (var i = 0; i < children.length; i++) {
-	            var id = children[i];
-	            var node = graph.hasEntity(id);
+	    for (var i = 0; i < arr.length; i++) {
+	      var id = arr[i] + (capture ? '-capture' : '-bubble');
+	      delete _keybindings[id];
+	    }
 
-	            // remove unused childNodes..
-	            if (targetWay.nodes.indexOf(id) === -1) {
-	                if (node && !isUsed(node, targetWay)) {
-	                    updates.removeIds.push(id);
-	                }
-	                continue;
-	            }
+	    return keybinding;
+	  }; // Add one or more keycode bindings.
+
+
+	  keybinding.on = function (codes, callback, capture) {
+	    if (typeof callback !== 'function') {
+	      return keybinding.off(codes, capture);
+	    }
+
+	    var arr = utilArrayUniq([].concat(codes));
+
+	    for (var i = 0; i < arr.length; i++) {
+	      var id = arr[i] + (capture ? '-capture' : '-bubble');
+	      var binding = {
+	        id: id,
+	        capture: capture,
+	        callback: callback,
+	        event: {
+	          key: undefined,
+	          // preferred
+	          keyCode: 0,
+	          // fallback
+	          modifiers: {
+	            shiftKey: false,
+	            ctrlKey: false,
+	            altKey: false,
+	            metaKey: false
+	          }
+	        }
+	      };
 
-	            // restore used childNodes..
-	            var local = localGraph.hasEntity(id);
-	            var remote = remoteGraph.hasEntity(id);
-	            var target;
+	      if (_keybindings[id]) {
+	        console.warn('warning: duplicate keybinding for "' + id + '"'); // eslint-disable-line no-console
+	      }
 
-	            if (_option === 'force_remote' && remote && remote.visible) {
-	                updates.replacements.push(remote);
+	      _keybindings[id] = binding;
+	      var matches = arr[i].toLowerCase().match(/(?:(?:[^+⇧⌃⌥⌘])+|[⇧⌃⌥⌘]|\+\+|^\+$)/g);
 
-	            } else if (_option === 'force_local' && local) {
-	                target = osmEntity(local);
-	                if (remote) {
-	                    target = target.update({ version: remote.version });
-	                }
-	                updates.replacements.push(target);
+	      for (var j = 0; j < matches.length; j++) {
+	        // Normalise matching errors
+	        if (matches[j] === '++') matches[j] = '+';
 
-	            } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
-	                target = osmEntity(local, { version: remote.version });
-	                if (remote.visible) {
-	                    target = mergeLocation(remote, target);
-	                } else {
-	                    _conflicts.push(_t('merge_remote_changes.conflict.deleted', { user: user(remote.user) }));
-	                }
+	        if (matches[j] in utilKeybinding.modifierCodes) {
+	          var prop = utilKeybinding.modifierProperties[utilKeybinding.modifierCodes[matches[j]]];
+	          binding.event.modifiers[prop] = true;
+	        } else {
+	          binding.event.key = utilKeybinding.keys[matches[j]] || matches[j];
 
-	                if (_conflicts.length !== ccount) { break; }
-	                updates.replacements.push(target);
-	            }
+	          if (matches[j] in utilKeybinding.keyCodes) {
+	            binding.event.keyCode = utilKeybinding.keyCodes[matches[j]];
+	          }
 	        }
-
-	        return targetWay;
+	      }
 	    }
 
+	    return keybinding;
+	  };
 
-	    function updateChildren(updates, graph) {
-	        for (var i = 0; i < updates.replacements.length; i++) {
-	            graph = graph.replace(updates.replacements[i]);
-	        }
-	        if (updates.removeIds.length) {
-	            graph = actionDeleteMultiple(updates.removeIds)(graph);
-	        }
-	        return graph;
+	  return keybinding;
+	}
+	/*
+	 * See https://github.com/keithamus/jwerty
+	 */
+
+	utilKeybinding.modifierCodes = {
+	  // Shift key, ⇧
+	  '⇧': 16,
+	  shift: 16,
+	  // CTRL key, on Mac: ⌃
+	  '⌃': 17,
+	  ctrl: 17,
+	  // ALT key, on Mac: ⌥ (Alt)
+	  '⌥': 18,
+	  alt: 18,
+	  option: 18,
+	  // META, on Mac: ⌘ (CMD), on Windows (Win), on Linux (Super)
+	  '⌘': 91,
+	  meta: 91,
+	  cmd: 91,
+	  'super': 91,
+	  win: 91
+	};
+	utilKeybinding.modifierProperties = {
+	  16: 'shiftKey',
+	  17: 'ctrlKey',
+	  18: 'altKey',
+	  91: 'metaKey'
+	};
+	utilKeybinding.plusKeys = ['plus', 'ffplus', '=', 'ffequals', '≠', '±'];
+	utilKeybinding.minusKeys = ['_', '-', 'ffminus', 'dash', '–', '—'];
+	utilKeybinding.keys = {
+	  // Backspace key, on Mac: ⌫ (Backspace)
+	  '⌫': 'Backspace',
+	  backspace: 'Backspace',
+	  // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
+	  '⇥': 'Tab',
+	  '⇆': 'Tab',
+	  tab: 'Tab',
+	  // Return key, ↩
+	  '↩': 'Enter',
+	  '↵': 'Enter',
+	  '⏎': 'Enter',
+	  'return': 'Enter',
+	  enter: 'Enter',
+	  '⌅': 'Enter',
+	  // Pause/Break key
+	  'pause': 'Pause',
+	  'pause-break': 'Pause',
+	  // Caps Lock key, ⇪
+	  '⇪': 'CapsLock',
+	  caps: 'CapsLock',
+	  'caps-lock': 'CapsLock',
+	  // Escape key, on Mac: ⎋, on Windows: Esc
+	  '⎋': ['Escape', 'Esc'],
+	  escape: ['Escape', 'Esc'],
+	  esc: ['Escape', 'Esc'],
+	  // Space key
+	  space: [' ', 'Spacebar'],
+	  // Page-Up key, or pgup, on Mac: ↖
+	  '↖': 'PageUp',
+	  pgup: 'PageUp',
+	  'page-up': 'PageUp',
+	  // Page-Down key, or pgdown, on Mac: ↘
+	  '↘': 'PageDown',
+	  pgdown: 'PageDown',
+	  'page-down': 'PageDown',
+	  // END key, on Mac: ⇟
+	  '⇟': 'End',
+	  end: 'End',
+	  // HOME key, on Mac: ⇞
+	  '⇞': 'Home',
+	  home: 'Home',
+	  // Insert key, or ins
+	  ins: 'Insert',
+	  insert: 'Insert',
+	  // Delete key, on Mac: ⌦ (Delete)
+	  '⌦': ['Delete', 'Del'],
+	  del: ['Delete', 'Del'],
+	  'delete': ['Delete', 'Del'],
+	  // Left Arrow Key, or ←
+	  '←': ['ArrowLeft', 'Left'],
+	  left: ['ArrowLeft', 'Left'],
+	  'arrow-left': ['ArrowLeft', 'Left'],
+	  // Up Arrow Key, or ↑
+	  '↑': ['ArrowUp', 'Up'],
+	  up: ['ArrowUp', 'Up'],
+	  'arrow-up': ['ArrowUp', 'Up'],
+	  // Right Arrow Key, or →
+	  '→': ['ArrowRight', 'Right'],
+	  right: ['ArrowRight', 'Right'],
+	  'arrow-right': ['ArrowRight', 'Right'],
+	  // Up Arrow Key, or ↓
+	  '↓': ['ArrowDown', 'Down'],
+	  down: ['ArrowDown', 'Down'],
+	  'arrow-down': ['ArrowDown', 'Down'],
+	  // odities, stuff for backward compatibility (browsers and code):
+	  // Num-Multiply, or *
+	  '*': ['*', 'Multiply'],
+	  star: ['*', 'Multiply'],
+	  asterisk: ['*', 'Multiply'],
+	  multiply: ['*', 'Multiply'],
+	  // Num-Plus or +
+	  '+': ['+', 'Add'],
+	  'plus': ['+', 'Add'],
+	  // Num-Subtract, or -
+	  '-': ['-', 'Subtract'],
+	  subtract: ['-', 'Subtract'],
+	  'dash': ['-', 'Subtract'],
+	  // Semicolon
+	  semicolon: ';',
+	  // = or equals
+	  equals: '=',
+	  // Comma, or ,
+	  comma: ',',
+	  // Period, or ., or full-stop
+	  period: '.',
+	  'full-stop': '.',
+	  // Slash, or /, or forward-slash
+	  slash: '/',
+	  'forward-slash': '/',
+	  // Tick, or `, or back-quote
+	  tick: '`',
+	  'back-quote': '`',
+	  // Open bracket, or [
+	  'open-bracket': '[',
+	  // Back slash, or \
+	  'back-slash': '\\',
+	  // Close backet, or ]
+	  'close-bracket': ']',
+	  // Apostrophe, or Quote, or '
+	  quote: '\'',
+	  apostrophe: '\'',
+	  // NUMPAD 0-9
+	  'num-0': '0',
+	  'num-1': '1',
+	  'num-2': '2',
+	  'num-3': '3',
+	  'num-4': '4',
+	  'num-5': '5',
+	  'num-6': '6',
+	  'num-7': '7',
+	  'num-8': '8',
+	  'num-9': '9',
+	  // F1-F25
+	  f1: 'F1',
+	  f2: 'F2',
+	  f3: 'F3',
+	  f4: 'F4',
+	  f5: 'F5',
+	  f6: 'F6',
+	  f7: 'F7',
+	  f8: 'F8',
+	  f9: 'F9',
+	  f10: 'F10',
+	  f11: 'F11',
+	  f12: 'F12',
+	  f13: 'F13',
+	  f14: 'F14',
+	  f15: 'F15',
+	  f16: 'F16',
+	  f17: 'F17',
+	  f18: 'F18',
+	  f19: 'F19',
+	  f20: 'F20',
+	  f21: 'F21',
+	  f22: 'F22',
+	  f23: 'F23',
+	  f24: 'F24',
+	  f25: 'F25'
+	};
+	utilKeybinding.keyCodes = {
+	  // Backspace key, on Mac: ⌫ (Backspace)
+	  '⌫': 8,
+	  backspace: 8,
+	  // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
+	  '⇥': 9,
+	  '⇆': 9,
+	  tab: 9,
+	  // Return key, ↩
+	  '↩': 13,
+	  '↵': 13,
+	  '⏎': 13,
+	  'return': 13,
+	  enter: 13,
+	  '⌅': 13,
+	  // Pause/Break key
+	  'pause': 19,
+	  'pause-break': 19,
+	  // Caps Lock key, ⇪
+	  '⇪': 20,
+	  caps: 20,
+	  'caps-lock': 20,
+	  // Escape key, on Mac: ⎋, on Windows: Esc
+	  '⎋': 27,
+	  escape: 27,
+	  esc: 27,
+	  // Space key
+	  space: 32,
+	  // Page-Up key, or pgup, on Mac: ↖
+	  '↖': 33,
+	  pgup: 33,
+	  'page-up': 33,
+	  // Page-Down key, or pgdown, on Mac: ↘
+	  '↘': 34,
+	  pgdown: 34,
+	  'page-down': 34,
+	  // END key, on Mac: ⇟
+	  '⇟': 35,
+	  end: 35,
+	  // HOME key, on Mac: ⇞
+	  '⇞': 36,
+	  home: 36,
+	  // Insert key, or ins
+	  ins: 45,
+	  insert: 45,
+	  // Delete key, on Mac: ⌦ (Delete)
+	  '⌦': 46,
+	  del: 46,
+	  'delete': 46,
+	  // Left Arrow Key, or ←
+	  '←': 37,
+	  left: 37,
+	  'arrow-left': 37,
+	  // Up Arrow Key, or ↑
+	  '↑': 38,
+	  up: 38,
+	  'arrow-up': 38,
+	  // Right Arrow Key, or →
+	  '→': 39,
+	  right: 39,
+	  'arrow-right': 39,
+	  // Up Arrow Key, or ↓
+	  '↓': 40,
+	  down: 40,
+	  'arrow-down': 40,
+	  // odities, printing characters that come out wrong:
+	  // Firefox Equals
+	  'ffequals': 61,
+	  // Num-Multiply, or *
+	  '*': 106,
+	  star: 106,
+	  asterisk: 106,
+	  multiply: 106,
+	  // Num-Plus or +
+	  '+': 107,
+	  'plus': 107,
+	  // Num-Subtract, or -
+	  '-': 109,
+	  subtract: 109,
+	  // Vertical Bar / Pipe
+	  '|': 124,
+	  // Firefox Plus
+	  'ffplus': 171,
+	  // Firefox Minus
+	  'ffminus': 173,
+	  // Semicolon
+	  ';': 186,
+	  semicolon: 186,
+	  // = or equals
+	  '=': 187,
+	  'equals': 187,
+	  // Comma, or ,
+	  ',': 188,
+	  comma: 188,
+	  // Dash / Underscore key
+	  'dash': 189,
+	  // Period, or ., or full-stop
+	  '.': 190,
+	  period: 190,
+	  'full-stop': 190,
+	  // Slash, or /, or forward-slash
+	  '/': 191,
+	  slash: 191,
+	  'forward-slash': 191,
+	  // Tick, or `, or back-quote
+	  '`': 192,
+	  tick: 192,
+	  'back-quote': 192,
+	  // Open bracket, or [
+	  '[': 219,
+	  'open-bracket': 219,
+	  // Back slash, or \
+	  '\\': 220,
+	  'back-slash': 220,
+	  // Close backet, or ]
+	  ']': 221,
+	  'close-bracket': 221,
+	  // Apostrophe, or Quote, or '
+	  '\'': 222,
+	  quote: 222,
+	  apostrophe: 222
+	}; // NUMPAD 0-9
+
+	var i = 95,
+	    n = 0;
+
+	while (++i < 106) {
+	  utilKeybinding.keyCodes['num-' + n] = i;
+	  ++n;
+	} // 0-9
+
+
+	i = 47;
+	n = 0;
+
+	while (++i < 58) {
+	  utilKeybinding.keyCodes[n] = i;
+	  ++n;
+	} // F1-F25
+
+
+	i = 111;
+	n = 1;
+
+	while (++i < 136) {
+	  utilKeybinding.keyCodes['f' + n] = i;
+	  ++n;
+	} // a-z
+
+
+	i = 64;
+
+	while (++i < 91) {
+	  utilKeybinding.keyCodes[String.fromCharCode(i).toLowerCase()] = i;
+	}
+
+	function utilObjectOmit(obj, omitKeys) {
+	  return Object.keys(obj).reduce(function (result, key) {
+	    if (omitKeys.indexOf(key) === -1) {
+	      result[key] = obj[key]; // keep
 	    }
 
+	    return result;
+	  }, {});
+	}
 
-	    function mergeMembers(remote, target) {
-	        if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
-	            return target;
-	        }
-	        if (_option === 'force_remote') {
-	            return target.update({members: remote.members});
-	        }
+	// Copies a variable number of methods from source to target.
+	function utilRebind(target, source) {
+	  var i = 1,
+	      n = arguments.length,
+	      method;
+
+	  while (++i < n) {
+	    target[method = arguments[i]] = d3_rebind(target, source, source[method]);
+	  }
+
+	  return target;
+	} // Method is assumed to be a standard D3 getter-setter:
+	// If passed with no arguments, gets the value.
+	// If passed with arguments, sets the value and returns the target.
+
+	function d3_rebind(target, source, method) {
+	  return function () {
+	    var value = method.apply(source, arguments);
+	    return value === source ? target : value;
+	  };
+	}
+
+	// A per-domain session mutex backed by a cookie and dead man's
+	// switch. If the session crashes, the mutex will auto-release
+	// after 5 seconds.
+	// This accepts a string and returns an object that complies with utilSessionMutexType
+	function utilSessionMutex(name) {
+	  var mutex = {};
+	  var intervalID;
 
-	        _conflicts.push(_t('merge_remote_changes.conflict.memberlist', { user: user(remote.user) }));
-	        return target;
-	    }
+	  function renew() {
+	    var expires = new Date();
+	    expires.setSeconds(expires.getSeconds() + 5);
+	    document.cookie = name + '=1; expires=' + expires.toUTCString() + '; sameSite=strict';
+	  }
 
+	  mutex.lock = function () {
+	    if (intervalID) return true;
+	    var cookie = document.cookie.replace(new RegExp('(?:(?:^|.*;)\\s*' + name + '\\s*\\=\\s*([^;]*).*$)|^.*$'), '$1');
+	    if (cookie) return false;
+	    renew();
+	    intervalID = window.setInterval(renew, 4000);
+	    return true;
+	  };
 
-	    function mergeTags(base, remote, target) {
-	        if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
-	            return target;
-	        }
-	        if (_option === 'force_remote') {
-	            return target.update({tags: remote.tags});
-	        }
+	  mutex.unlock = function () {
+	    if (!intervalID) return;
+	    document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT; sameSite=strict';
+	    clearInterval(intervalID);
+	    intervalID = null;
+	  };
 
-	        var ccount = _conflicts.length;
-	        var o = base.tags || {};
-	        var a = target.tags || {};
-	        var b = remote.tags || {};
-	        var keys = utilArrayUnion(utilArrayUnion(Object.keys(o), Object.keys(a)), Object.keys(b))
-	            .filter(function(k) { return !discardTags[k]; });
-	        var tags = Object.assign({}, a);   // shallow copy
-	        var changed = false;
+	  mutex.locked = function () {
+	    return !!intervalID;
+	  };
 
-	        for (var i = 0; i < keys.length; i++) {
-	            var k = keys[i];
+	  return mutex;
+	}
 
-	            if (o[k] !== b[k] && a[k] !== b[k]) {    // changed remotely..
-	                if (o[k] !== a[k]) {      // changed locally..
-	                    _conflicts.push(_t('merge_remote_changes.conflict.tags',
-	                        { tag: k, local: a[k], remote: b[k], user: user(remote.user) }));
+	function utilTiler() {
+	  var _size = [256, 256];
+	  var _scale = 256;
+	  var _tileSize = 256;
+	  var _zoomExtent = [0, 20];
+	  var _translate = [_size[0] / 2, _size[1] / 2];
+	  var _margin = 0;
+	  var _skipNullIsland = false;
+
+	  function clamp(num, min, max) {
+	    return Math.max(min, Math.min(num, max));
+	  }
 
-	                } else {                  // unchanged locally, accept remote change..
-	                    if (b.hasOwnProperty(k)) {
-	                        tags[k] = b[k];
-	                    } else {
-	                        delete tags[k];
-	                    }
-	                    changed = true;
-	                }
-	            }
-	        }
+	  function nearNullIsland(tile) {
+	    var x = tile[0];
+	    var y = tile[1];
+	    var z = tile[2];
 
-	        return (changed && _conflicts.length === ccount) ? target.update({tags: tags}) : target;
+	    if (z >= 7) {
+	      var center = Math.pow(2, z - 1);
+	      var width = Math.pow(2, z - 6);
+	      var min = center - width / 2;
+	      var max = center + width / 2 - 1;
+	      return x >= min && x <= max && y >= min && y <= max;
 	    }
 
+	    return false;
+	  }
 
-	    //  `graph.base()` is the common ancestor of the two graphs.
-	    //  `localGraph` contains user's edits up to saving
-	    //  `remoteGraph` contains remote edits to modified nodes
-	    //  `graph` must be a descendent of `localGraph` and may include
-	    //      some conflict resolution actions performed on it.
-	    //
-	    //                  --- ... --- `localGraph` -- ... -- `graph`
-	    //                 /
-	    //  `graph.base()` --- ... --- `remoteGraph`
-	    //
-	    var action = function(graph) {
-	        var updates = { replacements: [], removeIds: [] };
-	        var base = graph.base().entities[id];
-	        var local = localGraph.entity(id);
-	        var remote = remoteGraph.entity(id);
-	        var target = osmEntity(local, { version: remote.version });
+	  function tiler() {
+	    var z = geoScaleToZoom(_scale / (2 * Math.PI), _tileSize);
+	    var z0 = clamp(Math.round(z), _zoomExtent[0], _zoomExtent[1]);
+	    var tileMin = 0;
+	    var tileMax = Math.pow(2, z0) - 1;
+	    var log2ts = Math.log(_tileSize) * Math.LOG2E;
+	    var k = Math.pow(2, z - z0 + log2ts);
+	    var origin = [(_translate[0] - _scale / 2) / k, (_translate[1] - _scale / 2) / k];
+	    var cols = range$1(clamp(Math.floor(-origin[0]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[0] / k - origin[0]) + _margin, tileMin, tileMax + 1));
+	    var rows = range$1(clamp(Math.floor(-origin[1]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[1] / k - origin[1]) + _margin, tileMin, tileMax + 1));
+	    var tiles = [];
 
-	        // delete/undelete
-	        if (!remote.visible) {
-	            if (_option === 'force_remote') {
-	                return actionDeleteMultiple([id])(graph);
+	    for (var i = 0; i < rows.length; i++) {
+	      var y = rows[i];
 
-	            } else if (_option === 'force_local') {
-	                if (target.type === 'way') {
-	                    target = mergeChildren(target, utilArrayUniq(local.nodes), updates, graph);
-	                    graph = updateChildren(updates, graph);
-	                }
-	                return graph.replace(target);
+	      for (var j = 0; j < cols.length; j++) {
+	        var x = cols[j];
 
-	            } else {
-	                _conflicts.push(_t('merge_remote_changes.conflict.deleted', { user: user(remote.user) }));
-	                return graph;  // do nothing
-	            }
+	        if (i >= _margin && i <= rows.length - _margin && j >= _margin && j <= cols.length - _margin) {
+	          tiles.unshift([x, y, z0]); // tiles in view at beginning
+	        } else {
+	          tiles.push([x, y, z0]); // tiles in margin at the end
 	        }
+	      }
+	    }
+
+	    tiles.translate = origin;
+	    tiles.scale = k;
+	    return tiles;
+	  }
+	  /**
+	   * getTiles() returns an array of tiles that cover the map view
+	   */
 
-	        // merge
-	        if (target.type === 'node') {
-	            target = mergeLocation(remote, target);
 
-	        } else if (target.type === 'way') {
-	            // pull in any child nodes that may not be present locally..
-	            graph.rebase(remoteGraph.childNodes(remote), [graph], false);
-	            target = mergeNodes(base, remote, target);
-	            target = mergeChildren(target, utilArrayUnion(local.nodes, remote.nodes), updates, graph);
+	  tiler.getTiles = function (projection) {
+	    var origin = [projection.scale() * Math.PI - projection.translate()[0], projection.scale() * Math.PI - projection.translate()[1]];
+	    this.size(projection.clipExtent()[1]).scale(projection.scale() * 2 * Math.PI).translate(projection.translate());
+	    var tiles = tiler();
+	    var ts = tiles.scale;
+	    return tiles.map(function (tile) {
+	      if (_skipNullIsland && nearNullIsland(tile)) {
+	        return false;
+	      }
 
-	        } else if (target.type === 'relation') {
-	            target = mergeMembers(remote, target);
-	        }
+	      var x = tile[0] * ts - origin[0];
+	      var y = tile[1] * ts - origin[1];
+	      return {
+	        id: tile.toString(),
+	        xyz: tile,
+	        extent: geoExtent(projection.invert([x, y + ts]), projection.invert([x + ts, y]))
+	      };
+	    }).filter(Boolean);
+	  };
+	  /**
+	   * getGeoJSON() returns a FeatureCollection for debugging tiles
+	   */
 
-	        target = mergeTags(base, remote, target);
 
-	        if (!_conflicts.length) {
-	            graph = updateChildren(updates, graph).replace(target);
+	  tiler.getGeoJSON = function (projection) {
+	    var features = tiler.getTiles(projection).map(function (tile) {
+	      return {
+	        type: 'Feature',
+	        properties: {
+	          id: tile.id,
+	          name: tile.id
+	        },
+	        geometry: {
+	          type: 'Polygon',
+	          coordinates: [tile.extent.polygon()]
 	        }
-
-	        return graph;
+	      };
+	    });
+	    return {
+	      type: 'FeatureCollection',
+	      features: features
 	    };
+	  };
 
+	  tiler.tileSize = function (val) {
+	    if (!arguments.length) return _tileSize;
+	    _tileSize = val;
+	    return tiler;
+	  };
 
-	    action.withOption = function(opt) {
-	        _option = opt;
-	        return action;
-	    };
+	  tiler.zoomExtent = function (val) {
+	    if (!arguments.length) return _zoomExtent;
+	    _zoomExtent = val;
+	    return tiler;
+	  };
 
+	  tiler.size = function (val) {
+	    if (!arguments.length) return _size;
+	    _size = val;
+	    return tiler;
+	  };
 
-	    action.conflicts = function() {
-	        return _conflicts;
-	    };
+	  tiler.scale = function (val) {
+	    if (!arguments.length) return _scale;
+	    _scale = val;
+	    return tiler;
+	  };
 
+	  tiler.translate = function (val) {
+	    if (!arguments.length) return _translate;
+	    _translate = val;
+	    return tiler;
+	  }; // number to extend the rows/columns beyond those covering the viewport
 
-	    return action;
-	}
 
-	// https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/command/MoveCommand.java
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
-	function actionMove(moveIDs, tryDelta, projection, cache) {
-	    var _delta = tryDelta;
+	  tiler.margin = function (val) {
+	    if (!arguments.length) return _margin;
+	    _margin = +val;
+	    return tiler;
+	  };
 
-	    function setupCache(graph) {
-	        function canMove(nodeID) {
-	            // Allow movement of any node that is in the selectedIDs list..
-	            if (moveIDs.indexOf(nodeID) !== -1) { return true; }
+	  tiler.skipNullIsland = function (val) {
+	    if (!arguments.length) return _skipNullIsland;
+	    _skipNullIsland = val;
+	    return tiler;
+	  };
 
-	            // Allow movement of a vertex where 2 ways meet..
-	            var parents = graph.parentWays(graph.entity(nodeID));
-	            if (parents.length < 3) { return true; }
+	  return tiler;
+	}
 
-	            // Restrict movement of a vertex where >2 ways meet, unless all parentWays are moving too..
-	            var parentsMoving = parents.every(function(way) { return cache.moving[way.id]; });
-	            if (!parentsMoving) { delete cache.moving[nodeID]; }
+	function utilTriggerEvent(target, type) {
+	  target.each(function () {
+	    var evt = document.createEvent('HTMLEvents');
+	    evt.initEvent(type, true, true);
+	    this.dispatchEvent(evt);
+	  });
+	}
 
-	            return parentsMoving;
-	        }
+	var _mainLocations = coreLocations(); // singleton
+	// `coreLocations` maintains an internal index of all the boundaries/geofences used by iD.
+	// It's used by presets, community index, background imagery, to know where in the world these things are valid.
+	// These geofences should be defined by `locationSet` objects:
+	//
+	// let locationSet = {
+	//   include: [ Array of locations ],
+	//   exclude: [ Array of locations ]
+	// };
+	//
+	// For more info see the location-conflation and country-coder projects, see:
+	// https://github.com/ideditor/location-conflation
+	// https://github.com/ideditor/country-coder
+	//
 
-	        function cacheEntities(ids) {
-	            for (var i = 0; i < ids.length; i++) {
-	                var id = ids[i];
-	                if (cache.moving[id]) { continue; }
-	                cache.moving[id] = true;
+	function coreLocations() {
+	  var _this = {};
+	  var _resolvedFeatures = {}; // cache of *resolved* locationSet features
 
-	                var entity = graph.hasEntity(id);
-	                if (!entity) { continue; }
+	  var _loco = new _default(); // instance of a location-conflation resolver
 
-	                if (entity.type === 'node') {
-	                    cache.nodes.push(id);
-	                    cache.startLoc[id] = entity.loc;
-	                } else if (entity.type === 'way') {
-	                    cache.ways.push(id);
-	                    cacheEntities(entity.nodes);
-	                } else {
-	                    cacheEntities(entity.members.map(function(member) {
-	                        return member.id;
-	                    }));
-	                }
-	            }
-	        }
 
-	        function cacheIntersections(ids) {
-	            function isEndpoint(way, id) {
-	                return !way.isClosed() && !!way.affix(id);
-	            }
+	  var _wp; // instance of a which-polygon index
+	  // pre-resolve the worldwide locationSet
 
-	            for (var i = 0; i < ids.length; i++) {
-	                var id = ids[i];
-
-	                // consider only intersections with 1 moved and 1 unmoved way.
-	                var childNodes = graph.childNodes(graph.entity(id));
-	                for (var j = 0; j < childNodes.length; j++) {
-	                    var node = childNodes[j];
-	                    var parents = graph.parentWays(node);
-	                    if (parents.length !== 2) { continue; }
-
-	                    var moved = graph.entity(id);
-	                    var unmoved = null;
-	                    for (var k = 0; k < parents.length; k++) {
-	                        var way = parents[k];
-	                        if (!cache.moving[way.id]) {
-	                            unmoved = way;
-	                            break;
-	                        }
-	                    }
-	                    if (!unmoved) { continue; }
-
-	                    // exclude ways that are overly connected..
-	                    if (utilArrayIntersection(moved.nodes, unmoved.nodes).length > 2) { continue; }
-	                    if (moved.isArea() || unmoved.isArea()) { continue; }
-
-	                    cache.intersections.push({
-	                        nodeId: node.id,
-	                        movedId: moved.id,
-	                        unmovedId: unmoved.id,
-	                        movedIsEP: isEndpoint(moved, node.id),
-	                        unmovedIsEP: isEndpoint(unmoved, node.id)
-	                    });
-	                }
-	            }
-	        }
 
+	  var world = {
+	    locationSet: {
+	      include: ['Q2']
+	    }
+	  };
+	  resolveLocationSet(world);
+	  rebuildIndex();
+	  var _queue = [];
 
-	        if (!cache) {
-	            cache = {};
-	        }
-	        if (!cache.ok) {
-	            cache.moving = {};
-	            cache.intersections = [];
-	            cache.replacedVertex = {};
-	            cache.startLoc = {};
-	            cache.nodes = [];
-	            cache.ways = [];
+	  var _deferred = new Set();
 
-	            cacheEntities(moveIDs);
-	            cacheIntersections(cache.ways);
-	            cache.nodes = cache.nodes.filter(canMove);
+	  var _inProcess; // Returns a Promise to process the queue
 
-	            cache.ok = true;
-	        }
-	    }
 
+	  function processQueue() {
+	    if (!_queue.length) return Promise.resolve(); // console.log(`queue length ${_queue.length}`);
 
-	    // Place a vertex where the moved vertex used to be, to preserve way shape..
-	    //
-	    //  Start:
-	    //      b ---- e
-	    //     / \
-	    //    /   \
-	    //   /     \
-	    //  a       c
-	    //
-	    //      *               node '*' added to preserve shape
-	    //     / \
-	    //    /   b ---- e      way `b,e` moved here:
-	    //   /     \
-	    //  a       c
-	    //
-	    //
-	    function replaceMovedVertex(nodeId, wayId, graph, delta) {
-	        var way = graph.entity(wayId);
-	        var moved = graph.entity(nodeId);
-	        var movedIndex = way.nodes.indexOf(nodeId);
-	        var len, prevIndex, nextIndex;
+	    var chunk = _queue.pop();
 
-	        if (way.isClosed()) {
-	            len = way.nodes.length - 1;
-	            prevIndex = (movedIndex + len - 1) % len;
-	            nextIndex = (movedIndex + len + 1) % len;
-	        } else {
-	            len = way.nodes.length;
-	            prevIndex = movedIndex - 1;
-	            nextIndex = movedIndex + 1;
-	        }
+	    return new Promise(function (resolvePromise) {
+	      var handle = window.requestIdleCallback(function () {
+	        _deferred["delete"](handle); // const t0 = performance.now();
 
-	        var prev = graph.hasEntity(way.nodes[prevIndex]);
-	        var next = graph.hasEntity(way.nodes[nextIndex]);
 
-	        // Don't add orig vertex at endpoint..
-	        if (!prev || !next) { return graph; }
+	        chunk.forEach(resolveLocationSet); // const t1 = performance.now();
+	        // console.log('chunk processed in ' + (t1 - t0) + ' ms');
 
-	        var key = wayId + '_' + nodeId;
-	        var orig = cache.replacedVertex[key];
-	        if (!orig) {
-	            orig = osmNode();
-	            cache.replacedVertex[key] = orig;
-	            cache.startLoc[orig.id] = cache.startLoc[nodeId];
-	        }
+	        resolvePromise();
+	      });
 
-	        var start, end;
-	        if (delta) {
-	            start = projection(cache.startLoc[nodeId]);
-	            end = projection.invert(geoVecAdd(start, delta));
-	        } else {
-	            end = cache.startLoc[nodeId];
-	        }
-	        orig = orig.move(end);
+	      _deferred.add(handle);
+	    }).then(function () {
+	      return processQueue();
+	    });
+	  } // Pass an Object with a `locationSet` property,
+	  // Performs the locationSet resolution, caches the result, and sets a `locationSetID` property on the object.
 
-	        var angle = Math.abs(geoAngle(orig, prev, projection) -
-	                geoAngle(orig, next, projection)) * 180 / Math.PI;
 
-	        // Don't add orig vertex if it would just make a straight line..
-	        if (angle > 175 && angle < 185) { return graph; }
+	  function resolveLocationSet(obj) {
+	    if (obj.locationSetID) return; // work was done already
 
-	        // moving forward or backward along way?
-	        var p1 = [prev.loc, orig.loc, moved.loc, next.loc].map(projection);
-	        var p2 = [prev.loc, moved.loc, orig.loc, next.loc].map(projection);
-	        var d1 = geoPathLength(p1);
-	        var d2 = geoPathLength(p2);
-	        var insertAt = (d1 <= d2) ? movedIndex : nextIndex;
+	    try {
+	      var locationSet = obj.locationSet;
 
-	        // moving around closed loop?
-	        if (way.isClosed() && insertAt === 0) { insertAt = len; }
+	      if (!locationSet) {
+	        throw new Error('object missing locationSet property');
+	      }
 
-	        way = way.addNode(orig.id, insertAt);
-	        return graph.replace(orig).replace(way);
-	    }
+	      if (!locationSet.include) {
+	        // missing `include`, default to worldwide include
+	        locationSet.include = ['Q2']; // https://github.com/openstreetmap/iD/pull/8305#discussion_r662344647
+	      }
 
+	      var resolved = _loco.resolveLocationSet(locationSet);
 
-	    // Remove duplicate vertex that might have been added by
-	    // replaceMovedVertex.  This is done after the unzorro checks.
-	    function removeDuplicateVertices(wayId, graph) {
-	        var way = graph.entity(wayId);
-	        var epsilon = 1e-6;
-	        var prev, curr;
+	      var locationSetID = resolved.id;
+	      obj.locationSetID = locationSetID;
 
-	        function isInteresting(node, graph) {
-	            return graph.parentWays(node).length > 1 ||
-	                graph.parentRelations(node).length ||
-	                node.hasInterestingTags();
-	        }
+	      if (!resolved.feature.geometry.coordinates.length || !resolved.feature.properties.area) {
+	        throw new Error("locationSet ".concat(locationSetID, " resolves to an empty feature."));
+	      }
 
-	        for (var i = 0; i < way.nodes.length; i++) {
-	            curr = graph.entity(way.nodes[i]);
+	      if (!_resolvedFeatures[locationSetID]) {
+	        // First time seeing this locationSet feature
+	        var feature = JSON.parse(JSON.stringify(resolved.feature)); // deep clone
 
-	            if (prev && curr && geoVecEqual(prev.loc, curr.loc, epsilon)) {
-	                if (!isInteresting(prev, graph)) {
-	                    way = way.removeNode(prev.id);
-	                    graph = graph.replace(way).remove(prev);
-	                } else if (!isInteresting(curr, graph)) {
-	                    way = way.removeNode(curr.id);
-	                    graph = graph.replace(way).remove(curr);
-	                }
-	            }
+	        feature.id = locationSetID; // Important: always use the locationSet `id` (`+[Q30]`), not the feature `id` (`Q30`)
 
-	            prev = curr;
-	        }
+	        feature.properties.id = locationSetID;
+	        _resolvedFeatures[locationSetID] = feature; // insert into cache
+	      }
+	    } catch (err) {
+	      obj.locationSet = {
+	        include: ['Q2']
+	      }; // default worldwide
 
-	        return graph;
+	      obj.locationSetID = '+[Q2]';
 	    }
+	  } // Rebuilds the whichPolygon index with whatever features have been resolved.
 
 
-	    // Reorder nodes around intersections that have moved..
-	    //
-	    //  Start:                way1.nodes: b,e         (moving)
-	    //  a - b - c ----- d     way2.nodes: a,b,c,d     (static)
-	    //      |                 vertex: b
-	    //      e                 isEP1: true,  isEP2, false
-	    //
-	    //  way1 `b,e` moved here:
-	    //  a ----- c = b - d
-	    //              |
-	    //              e
-	    //
-	    //  reorder nodes         way1.nodes: b,e
-	    //  a ----- c - b - d     way2.nodes: a,c,b,d
-	    //              |
-	    //              e
-	    //
-	    function unZorroIntersection(intersection, graph) {
-	        var vertex = graph.entity(intersection.nodeId);
-	        var way1 = graph.entity(intersection.movedId);
-	        var way2 = graph.entity(intersection.unmovedId);
-	        var isEP1 = intersection.movedIsEP;
-	        var isEP2 = intersection.unmovedIsEP;
-
-	        // don't move the vertex if it is the endpoint of both ways.
-	        if (isEP1 && isEP2) { return graph; }
-
-	        var nodes1 = graph.childNodes(way1).filter(function(n) { return n !== vertex; });
-	        var nodes2 = graph.childNodes(way2).filter(function(n) { return n !== vertex; });
-
-	        if (way1.isClosed() && way1.first() === vertex.id) { nodes1.push(nodes1[0]); }
-	        if (way2.isClosed() && way2.first() === vertex.id) { nodes2.push(nodes2[0]); }
-
-	        var edge1 = !isEP1 && geoChooseEdge(nodes1, projection(vertex.loc), projection);
-	        var edge2 = !isEP2 && geoChooseEdge(nodes2, projection(vertex.loc), projection);
-	        var loc;
-
-	        // snap vertex to nearest edge (or some point between them)..
-	        if (!isEP1 && !isEP2) {
-	            var epsilon = 1e-6, maxIter = 10;
-	            for (var i = 0; i < maxIter; i++) {
-	                loc = geoVecInterp(edge1.loc, edge2.loc, 0.5);
-	                edge1 = geoChooseEdge(nodes1, projection(loc), projection);
-	                edge2 = geoChooseEdge(nodes2, projection(loc), projection);
-	                if (Math.abs(edge1.distance - edge2.distance) < epsilon) { break; }
-	            }
-	        } else if (!isEP1) {
-	            loc = edge1.loc;
-	        } else {
-	            loc = edge2.loc;
-	        }
+	  function rebuildIndex() {
+	    _wp = whichPolygon_1({
+	      features: Object.values(_resolvedFeatures)
+	    });
+	  } //
+	  // `mergeCustomGeoJSON`
+	  //  Accepts an FeatureCollection-like object containing custom locations
+	  //  Each feature must have a filename-like `id`, for example: `something.geojson`
+	  //
+	  //  {
+	  //    "type": "FeatureCollection"
+	  //    "features": [
+	  //      {
+	  //        "type": "Feature",
+	  //        "id": "philly_metro.geojson",
+	  //        "properties": { … },
+	  //        "geometry": { … }
+	  //      }
+	  //    ]
+	  //  }
+	  //
 
-	        graph = graph.replace(vertex.move(loc));
 
-	        // if zorro happened, reorder nodes..
-	        if (!isEP1 && edge1.index !== way1.nodes.indexOf(vertex.id)) {
-	            way1 = way1.removeNode(vertex.id).addNode(vertex.id, edge1.index);
-	            graph = graph.replace(way1);
-	        }
-	        if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
-	            way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
-	            graph = graph.replace(way2);
-	        }
+	  _this.mergeCustomGeoJSON = function (fc) {
+	    if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
+	      fc.features.forEach(function (feature) {
+	        feature.properties = feature.properties || {};
+	        var props = feature.properties; // Get `id` from either `id` or `properties`
 
-	        return graph;
-	    }
+	        var id = feature.id || props.id;
+	        if (!id || !/^\S+\.geojson$/i.test(id)) return; // Ensure `id` exists and is lowercase
 
+	        id = id.toLowerCase();
+	        feature.id = id;
+	        props.id = id; // Ensure `area` property exists
 
-	    function cleanupIntersections(graph) {
-	        for (var i = 0; i < cache.intersections.length; i++) {
-	            var obj = cache.intersections[i];
-	            graph = replaceMovedVertex(obj.nodeId, obj.movedId, graph, _delta);
-	            graph = replaceMovedVertex(obj.nodeId, obj.unmovedId, graph, null);
-	            graph = unZorroIntersection(obj, graph);
-	            graph = removeDuplicateVertices(obj.movedId, graph);
-	            graph = removeDuplicateVertices(obj.unmovedId, graph);
+	        if (!props.area) {
+	          var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²
+
+	          props.area = Number(area.toFixed(2));
 	        }
 
-	        return graph;
+	        _loco._cache[id] = feature;
+	      });
 	    }
+	  }; //
+	  // `mergeLocationSets`
+	  //  Accepts an Array of Objects containing `locationSet` properties.
+	  //  The locationSets will be resolved and indexed in the background.
+	  //  [
+	  //   { id: 'preset1', locationSet: {…} },
+	  //   { id: 'preset2', locationSet: {…} },
+	  //   { id: 'preset3', locationSet: {…} },
+	  //   …
+	  //  ]
+	  //  After resolving and indexing, the Objects will be decorated with a
+	  //  `locationSetID` property.
+	  //  [
+	  //   { id: 'preset1', locationSet: {…}, locationSetID: '+[Q2]' },
+	  //   { id: 'preset2', locationSet: {…}, locationSetID: '+[Q30]' },
+	  //   { id: 'preset3', locationSet: {…}, locationSetID: '+[Q2]' },
+	  //   …
+	  //  ]
+	  //
+	  //  Returns a Promise fulfilled when the resolving/indexing has been completed
+	  //  This will take some seconds but happen in the background during browser idle time.
+	  //
 
 
-	    // check if moving way endpoint can cross an unmoved way, if so limit delta..
-	    function limitDelta(graph) {
-	        function moveNode(loc) {
-	            return geoVecAdd(projection(loc), _delta);
-	        }
+	  _this.mergeLocationSets = function (objects) {
+	    if (!Array.isArray(objects)) return Promise.reject('nothing to do'); // Resolve all locationSets -> geojson, processing data in chunks
+	    //
+	    // Because this will happen during idle callbacks, we want to choose a chunk size
+	    // that won't make the browser stutter too badly.  LocationSets that are a simple
+	    // country coder include will resolve instantly, but ones that involve complex
+	    // include/exclude operations will take some milliseconds longer.
+	    //
+	    // Some discussion and performance results on these tickets:
+	    // https://github.com/ideditor/location-conflation/issues/26
+	    // https://github.com/osmlab/name-suggestion-index/issues/4784#issuecomment-742003434
 
-	        for (var i = 0; i < cache.intersections.length; i++) {
-	            var obj = cache.intersections[i];
+	    _queue = _queue.concat(utilArrayChunk(objects, 200));
 
-	            // Don't limit movement if this is vertex joins 2 endpoints..
-	            if (obj.movedIsEP && obj.unmovedIsEP) { continue; }
-	            // Don't limit movement if this vertex is not an endpoint anyway..
-	            if (!obj.movedIsEP) { continue; }
+	    if (!_inProcess) {
+	      _inProcess = processQueue().then(function () {
+	        rebuildIndex();
+	        _inProcess = null;
+	        return objects;
+	      });
+	    }
 
-	            var node = graph.entity(obj.nodeId);
-	            var start = projection(node.loc);
-	            var end = geoVecAdd(start, _delta);
-	            var movedNodes = graph.childNodes(graph.entity(obj.movedId));
-	            var movedPath = movedNodes.map(function(n) { return moveNode(n.loc); });
-	            var unmovedNodes = graph.childNodes(graph.entity(obj.unmovedId));
-	            var unmovedPath = unmovedNodes.map(function(n) { return projection(n.loc); });
-	            var hits = geoPathIntersections(movedPath, unmovedPath);
+	    return _inProcess;
+	  }; //
+	  // `locationSetID`
+	  // Returns a locationSetID for a given locationSet (fallback to `+[Q2]`, world)
+	  // (The locationset doesn't necessarily need to be resolved to compute its `id`)
+	  //
+	  // Arguments
+	  //   `locationSet`: A locationSet, e.g. `{ include: ['us'] }`
+	  // Returns
+	  //   The locationSetID, e.g. `+[Q30]`
+	  //
 
-	            for (var j = 0; i < hits.length; i++) {
-	                if (geoVecEqual(hits[j], end)) { continue; }
-	                var edge = geoChooseEdge(unmovedNodes, end, projection);
-	                _delta = geoVecSubtract(projection(edge.loc), start);
-	            }
-	        }
-	    }
 
+	  _this.locationSetID = function (locationSet) {
+	    var locationSetID;
 
-	    var action = function(graph) {
-	        if (_delta[0] === 0 && _delta[1] === 0) { return graph; }
+	    try {
+	      locationSetID = _loco.validateLocationSet(locationSet).id;
+	    } catch (err) {
+	      locationSetID = '+[Q2]'; // the world
+	    }
 
-	        setupCache(graph);
+	    return locationSetID;
+	  }; //
+	  // `feature`
+	  // Returns the resolved GeoJSON feature for a given locationSetID (fallback to 'world')
+	  //
+	  // Arguments
+	  //   `locationSetID`: id of the form like `+[Q30]`  (United States)
+	  // Returns
+	  //   A GeoJSON feature:
+	  //   {
+	  //     type: 'Feature',
+	  //     id: '+[Q30]',
+	  //     properties: { id: '+[Q30]', area: 21817019.17, … },
+	  //     geometry: { … }
+	  //   }
+
+
+	  _this.feature = function (locationSetID) {
+	    return _resolvedFeatures[locationSetID] || _resolvedFeatures['+[Q2]'];
+	  }; //
+	  // `locationsAt`
+	  // Find all the resolved locationSets valid at the given location.
+	  // Results include the area (in km²) to facilitate sorting.
+	  //
+	  // Arguments
+	  //   `loc`: the [lon,lat] location to query, e.g. `[-74.4813, 40.7967]`
+	  // Returns
+	  //   Object of locationSetIDs to areas (in km²)
+	  //   {
+	  //     "+[Q2]": 511207893.3958111,
+	  //     "+[Q30]": 21817019.17,
+	  //     "+[new_jersey.geojson]": 22390.77,
+	  //     …
+	  //   }
+	  //
 
-	        if (cache.intersections.length) {
-	            limitDelta(graph);
-	        }
 
-	        for (var i = 0; i < cache.nodes.length; i++) {
-	            var node = graph.entity(cache.nodes[i]);
-	            var start = projection(node.loc);
-	            var end = geoVecAdd(start, _delta);
-	            graph = graph.replace(node.move(projection.invert(end)));
-	        }
+	  _this.locationsAt = function (loc) {
+	    var result = {};
+	    (_wp(loc, true) || []).forEach(function (prop) {
+	      return result[prop.id] = prop.area;
+	    });
+	    return result;
+	  }; //
+	  // `query`
+	  // Execute a query directly against which-polygon
+	  // https://github.com/mapbox/which-polygon
+	  //
+	  // Arguments
+	  //   `loc`: the [lon,lat] location to query,
+	  //   `multi`: `true` to return all results, `false` to return first result
+	  // Returns
+	  //   Array of GeoJSON *properties* for the locationSet features that exist at `loc`
+	  //
 
-	        if (cache.intersections.length) {
-	            graph = cleanupIntersections(graph);
-	        }
 
-	        return graph;
-	    };
+	  _this.query = function (loc, multi) {
+	    return _wp(loc, multi);
+	  }; // Direct access to the location-conflation resolver
 
 
-	    action.delta = function() {
-	        return _delta;
-	    };
+	  _this.loco = function () {
+	    return _loco;
+	  }; // Direct access to the which-polygon index
 
 
-	    return action;
-	}
+	  _this.wp = function () {
+	    return _wp;
+	  };
 
-	function actionMoveMember(relationId, fromIndex, toIndex) {
-	    return function(graph) {
-	        return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
-	    };
+	  return _this;
 	}
 
-	function actionMoveNode(nodeID, toLoc) {
+	var $$h = _export;
+	var $findIndex = arrayIteration.findIndex;
+	var addToUnscopables$1 = addToUnscopables$6;
 
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
+	var FIND_INDEX = 'findIndex';
+	var SKIPS_HOLES = true;
 
-	        var node = graph.entity(nodeID);
-	        return graph.replace(
-	            node.move(geoVecInterp(node.loc, toLoc, t))
-	        );
-	    };
+	// Shouldn't skip holes
+	if (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES = false; });
 
-	    action.transitionable = true;
+	// `Array.prototype.findIndex` method
+	// https://tc39.es/ecma262/#sec-array.prototype.findindex
+	$$h({ target: 'Array', proto: true, forced: SKIPS_HOLES }, {
+	  findIndex: function findIndex(callbackfn /* , that = undefined */) {
+	    return $findIndex(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	    return action;
-	}
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables$1(FIND_INDEX);
 
-	function actionNoop() {
-	    return function(graph) {
-	        return graph;
-	    };
-	}
+	var global$5 = global$1o;
+	var isRegExp = isRegexp;
 
-	function actionOrthogonalize(wayID, projection, vertexID, degThresh, ep) {
-	    var epsilon = ep || 1e-4;
-	    var threshold = degThresh || 13;  // degrees within right or straight to alter
+	var TypeError$3 = global$5.TypeError;
 
-	    // We test normalized dot products so we can compare as cos(angle)
-	    var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-	    var upperThreshold = Math.cos(threshold * Math.PI / 180);
+	var notARegexp = function (it) {
+	  if (isRegExp(it)) {
+	    throw TypeError$3("The method doesn't accept regular expressions");
+	  } return it;
+	};
 
+	var wellKnownSymbol = wellKnownSymbol$t;
 
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
+	var MATCH = wellKnownSymbol('match');
 
-	        var way = graph.entity(wayID);
-	        way = way.removeNode('');   // sanity check - remove any consecutive duplicates
+	var correctIsRegexpLogic = function (METHOD_NAME) {
+	  var regexp = /./;
+	  try {
+	    '/./'[METHOD_NAME](regexp);
+	  } catch (error1) {
+	    try {
+	      regexp[MATCH] = false;
+	      return '/./'[METHOD_NAME](regexp);
+	    } catch (error2) { /* empty */ }
+	  } return false;
+	};
+
+	var $$g = _export;
+	var uncurryThis$7 = functionUncurryThis;
+	var notARegExp$2 = notARegexp;
+	var requireObjectCoercible$3 = requireObjectCoercible$e;
+	var toString$4 = toString$k;
+	var correctIsRegExpLogic$2 = correctIsRegexpLogic;
+
+	var stringIndexOf = uncurryThis$7(''.indexOf);
+
+	// `String.prototype.includes` method
+	// https://tc39.es/ecma262/#sec-string.prototype.includes
+	$$g({ target: 'String', proto: true, forced: !correctIsRegExpLogic$2('includes') }, {
+	  includes: function includes(searchString /* , position = 0 */) {
+	    return !!~stringIndexOf(
+	      toString$4(requireObjectCoercible$3(this)),
+	      toString$4(notARegExp$2(searchString)),
+	      arguments.length > 1 ? arguments[1] : undefined
+	    );
+	  }
+	});
 
-	        if (way.tags.nonsquare) {
-	            var tags = Object.assign({}, way.tags);
-	            // since we're squaring, remove indication that this is physically unsquare
-	            delete tags.nonsquare;
-	            way = way.update({tags: tags});
-	        }
+	/** Detect free variable `global` from Node.js. */
+	var freeGlobal = (typeof global === "undefined" ? "undefined" : _typeof(global)) == 'object' && global && global.Object === Object && global;
 
-	        graph = graph.replace(way);
+	/** Detect free variable `self`. */
 
-	        var isClosed = way.isClosed();
-	        var nodes = graph.childNodes(way).slice();  // shallow copy
-	        if (isClosed) { nodes.pop(); }
+	var freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
+	/** Used as a reference to the global object. */
 
-	        if (vertexID !== undefined) {
-	            nodes = nodeSubset(nodes, vertexID, isClosed);
-	            if (nodes.length !== 3) { return graph; }
-	        }
+	var root = freeGlobal || freeSelf || Function('return this')();
 
-	        // note: all geometry functions here use the unclosed node/point/coord list
+	/** Built-in value references. */
 
-	        var nodeCount = {};
-	        var points = [];
-	        var corner = { i: 0, dotp: 1 };
-	        var node, point, loc, score, motions, i, j;
+	var _Symbol = root.Symbol;
 
-	        for (i = 0; i < nodes.length; i++) {
-	            node = nodes[i];
-	            nodeCount[node.id] = (nodeCount[node.id] || 0) + 1;
-	            points.push({ id: node.id, coord: projection(node.loc) });
-	        }
+	/** Used for built-in method references. */
 
+	var objectProto$1 = Object.prototype;
+	/** Used to check objects for own properties. */
 
-	        if (points.length === 3) {   // move only one vertex for right triangle
-	            for (i = 0; i < 1000; i++) {
-	                motions = points.map(calcMotion);
+	var hasOwnProperty$2 = objectProto$1.hasOwnProperty;
+	/**
+	 * Used to resolve the
+	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+	 * of values.
+	 */
 
-	                points[corner.i].coord = geoVecAdd(points[corner.i].coord, motions[corner.i]);
-	                score = corner.dotp;
-	                if (score < epsilon) {
-	                    break;
-	                }
-	            }
+	var nativeObjectToString$1 = objectProto$1.toString;
+	/** Built-in value references. */
 
-	            node = graph.entity(nodes[corner.i].id);
-	            loc = projection.invert(points[corner.i].coord);
-	            graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+	var symToStringTag$1 = _Symbol ? _Symbol.toStringTag : undefined;
+	/**
+	 * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
+	 *
+	 * @private
+	 * @param {*} value The value to query.
+	 * @returns {string} Returns the raw `toStringTag`.
+	 */
 
-	        } else {
-	            var straights = [];
-	            var simplified = [];
-
-	            // Remove points from nearly straight sections..
-	            // This produces a simplified shape to orthogonalize
-	            for (i = 0; i < points.length; i++) {
-	                point = points[i];
-	                var dotp = 0;
-	                if (isClosed || (i > 0 && i < points.length - 1)) {
-	                    var a = points[(i - 1 + points.length) % points.length];
-	                    var b = points[(i + 1) % points.length];
-	                    dotp = Math.abs(geoOrthoNormalizedDotProduct(a.coord, b.coord, point.coord));
-	                }
+	function getRawTag(value) {
+	  var isOwn = hasOwnProperty$2.call(value, symToStringTag$1),
+	      tag = value[symToStringTag$1];
 
-	                if (dotp > upperThreshold) {
-	                    straights.push(point);
-	                } else {
-	                    simplified.push(point);
-	                }
-	            }
+	  try {
+	    value[symToStringTag$1] = undefined;
+	    var unmasked = true;
+	  } catch (e) {}
 
-	            // Orthogonalize the simplified shape
-	            var bestPoints = clonePoints(simplified);
-	            var originalPoints = clonePoints(simplified);
+	  var result = nativeObjectToString$1.call(value);
 
-	            score = Infinity;
-	            for (i = 0; i < 1000; i++) {
-	                motions = simplified.map(calcMotion);
+	  if (unmasked) {
+	    if (isOwn) {
+	      value[symToStringTag$1] = tag;
+	    } else {
+	      delete value[symToStringTag$1];
+	    }
+	  }
 
-	                for (j = 0; j < motions.length; j++) {
-	                    simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
-	                }
-	                var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
-	                if (newScore < score) {
-	                    bestPoints = clonePoints(simplified);
-	                    score = newScore;
-	                }
-	                if (score < epsilon) {
-	                    break;
-	                }
-	            }
+	  return result;
+	}
 
-	            var bestCoords = bestPoints.map(function(p) { return p.coord; });
-	            if (isClosed) { bestCoords.push(bestCoords[0]); }
+	/** Used for built-in method references. */
+	var objectProto = Object.prototype;
+	/**
+	 * Used to resolve the
+	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+	 * of values.
+	 */
 
-	            // move the nodes that should move
-	            for (i = 0; i < bestPoints.length; i++) {
-	                point = bestPoints[i];
-	                if (!geoVecEqual(originalPoints[i].coord, point.coord)) {
-	                    node = graph.entity(point.id);
-	                    loc = projection.invert(point.coord);
-	                    graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
-	                }
-	            }
+	var nativeObjectToString = objectProto.toString;
+	/**
+	 * Converts `value` to a string using `Object.prototype.toString`.
+	 *
+	 * @private
+	 * @param {*} value The value to convert.
+	 * @returns {string} Returns the converted string.
+	 */
 
-	            // move the nodes along straight segments
-	            for (i = 0; i < straights.length; i++) {
-	                point = straights[i];
-	                if (nodeCount[point.id] > 1) { continue; }   // skip self-intersections
+	function objectToString(value) {
+	  return nativeObjectToString.call(value);
+	}
 
-	                node = graph.entity(point.id);
+	/** `Object#toString` result references. */
 
-	                if (t === 1 &&
-	                    graph.parentWays(node).length === 1 &&
-	                    graph.parentRelations(node).length === 0 &&
-	                    !node.hasInterestingTags()
-	                ) {
-	                    // remove uninteresting points..
-	                    graph = actionDeleteNode(node.id)(graph);
+	var nullTag = '[object Null]',
+	    undefinedTag = '[object Undefined]';
+	/** Built-in value references. */
 
-	                } else {
-	                    // move interesting points to the nearest edge..
-	                    var choice = geoVecProject(point.coord, bestCoords);
-	                    if (choice) {
-	                        loc = projection.invert(choice.target);
-	                        graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
-	                    }
-	                }
-	            }
-	        }
+	var symToStringTag = _Symbol ? _Symbol.toStringTag : undefined;
+	/**
+	 * The base implementation of `getTag` without fallbacks for buggy environments.
+	 *
+	 * @private
+	 * @param {*} value The value to query.
+	 * @returns {string} Returns the `toStringTag`.
+	 */
 
-	        return graph;
+	function baseGetTag(value) {
+	  if (value == null) {
+	    return value === undefined ? undefinedTag : nullTag;
+	  }
 
+	  return symToStringTag && symToStringTag in Object(value) ? getRawTag(value) : objectToString(value);
+	}
 
-	        function clonePoints(array) {
-	            return array.map(function(p) {
-	                return { id: p.id, coord: [p.coord[0], p.coord[1]] };
-	            });
-	        }
+	/**
+	 * Checks if `value` is object-like. A value is object-like if it's not `null`
+	 * and has a `typeof` result of "object".
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 4.0.0
+	 * @category Lang
+	 * @param {*} value The value to check.
+	 * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+	 * @example
+	 *
+	 * _.isObjectLike({});
+	 * // => true
+	 *
+	 * _.isObjectLike([1, 2, 3]);
+	 * // => true
+	 *
+	 * _.isObjectLike(_.noop);
+	 * // => false
+	 *
+	 * _.isObjectLike(null);
+	 * // => false
+	 */
+	function isObjectLike(value) {
+	  return value != null && _typeof(value) == 'object';
+	}
 
+	/** `Object#toString` result references. */
 
-	        function calcMotion(point, i, array) {
-	            // don't try to move the endpoints of a non-closed way.
-	            if (!isClosed && (i === 0 || i === array.length - 1)) { return [0, 0]; }
-	            // don't try to move a node that appears more than once (self intersection)
-	            if (nodeCount[array[i].id] > 1) { return [0, 0]; }
+	var symbolTag = '[object Symbol]';
+	/**
+	 * Checks if `value` is classified as a `Symbol` primitive or object.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 4.0.0
+	 * @category Lang
+	 * @param {*} value The value to check.
+	 * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+	 * @example
+	 *
+	 * _.isSymbol(Symbol.iterator);
+	 * // => true
+	 *
+	 * _.isSymbol('abc');
+	 * // => false
+	 */
 
-	            var a = array[(i - 1 + array.length) % array.length].coord;
-	            var origin = point.coord;
-	            var b = array[(i + 1) % array.length].coord;
-	            var p = geoVecSubtract(a, origin);
-	            var q = geoVecSubtract(b, origin);
+	function isSymbol(value) {
+	  return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
+	}
 
-	            var scale = 2 * Math.min(geoVecLength(p), geoVecLength(q));
-	            p = geoVecNormalize(p);
-	            q = geoVecNormalize(q);
+	/**
+	 * A specialized version of `_.map` for arrays without support for iteratee
+	 * shorthands.
+	 *
+	 * @private
+	 * @param {Array} [array] The array to iterate over.
+	 * @param {Function} iteratee The function invoked per iteration.
+	 * @returns {Array} Returns the new mapped array.
+	 */
+	function arrayMap(array, iteratee) {
+	  var index = -1,
+	      length = array == null ? 0 : array.length,
+	      result = Array(length);
 
-	            var dotp = (p[0] * q[0] + p[1] * q[1]);
-	            var val = Math.abs(dotp);
+	  while (++index < length) {
+	    result[index] = iteratee(array[index], index, array);
+	  }
 
-	            if (val < lowerThreshold) {  // nearly orthogonal
-	                corner.i = i;
-	                corner.dotp = val;
-	                var vec = geoVecNormalize(geoVecAdd(p, q));
-	                return geoVecScale(vec, 0.1 * dotp * scale);
-	            }
+	  return result;
+	}
 
-	            return [0, 0];   // do nothing
-	        }
-	    };
+	/**
+	 * Checks if `value` is classified as an `Array` object.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 0.1.0
+	 * @category Lang
+	 * @param {*} value The value to check.
+	 * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+	 * @example
+	 *
+	 * _.isArray([1, 2, 3]);
+	 * // => true
+	 *
+	 * _.isArray(document.body.children);
+	 * // => false
+	 *
+	 * _.isArray('abc');
+	 * // => false
+	 *
+	 * _.isArray(_.noop);
+	 * // => false
+	 */
+	var isArray$1 = Array.isArray;
 
+	/** Used as references for various `Number` constants. */
 
-	    // if we are only orthogonalizing one vertex,
-	    // get that vertex and the previous and next
-	    function nodeSubset(nodes, vertexID, isClosed) {
-	        var first = isClosed ? 0 : 1;
-	        var last = isClosed ? nodes.length : nodes.length - 1;
+	var INFINITY = 1 / 0;
+	/** Used to convert symbols to primitives and strings. */
 
-	        for (var i = first; i < last; i++) {
-	            if (nodes[i].id === vertexID) {
-	                return [
-	                    nodes[(i - 1 + nodes.length) % nodes.length],
-	                    nodes[i],
-	                    nodes[(i + 1) % nodes.length]
-	                ];
-	            }
-	        }
+	var symbolProto = _Symbol ? _Symbol.prototype : undefined,
+	    symbolToString = symbolProto ? symbolProto.toString : undefined;
+	/**
+	 * The base implementation of `_.toString` which doesn't convert nullish
+	 * values to empty strings.
+	 *
+	 * @private
+	 * @param {*} value The value to process.
+	 * @returns {string} Returns the string.
+	 */
 
-	        return [];
-	    }
+	function baseToString(value) {
+	  // Exit early for strings to avoid a performance hit in some environments.
+	  if (typeof value == 'string') {
+	    return value;
+	  }
 
+	  if (isArray$1(value)) {
+	    // Recursively convert values (susceptible to call stack limits).
+	    return arrayMap(value, baseToString) + '';
+	  }
 
-	    action.disabled = function(graph) {
-	        var way = graph.entity(wayID);
-	        way = way.removeNode('');  // sanity check - remove any consecutive duplicates
-	        graph = graph.replace(way);
+	  if (isSymbol(value)) {
+	    return symbolToString ? symbolToString.call(value) : '';
+	  }
 
-	        var isClosed = way.isClosed();
-	        var nodes = graph.childNodes(way).slice();  // shallow copy
-	        if (isClosed) { nodes.pop(); }
+	  var result = value + '';
+	  return result == '0' && 1 / value == -INFINITY ? '-0' : result;
+	}
 
-	        var allowStraightAngles = false;
-	        if (vertexID !== undefined) {
-	            allowStraightAngles = true;
-	            nodes = nodeSubset(nodes, vertexID, isClosed);
-	            if (nodes.length !== 3) { return 'end_vertex'; }
-	        }
+	/** Used to match a single whitespace character. */
+	var reWhitespace = /\s/;
+	/**
+	 * Used by `_.trim` and `_.trimEnd` to get the index of the last non-whitespace
+	 * character of `string`.
+	 *
+	 * @private
+	 * @param {string} string The string to inspect.
+	 * @returns {number} Returns the index of the last non-whitespace character.
+	 */
 
-	        var coords = nodes.map(function(n) { return projection(n.loc); });
-	        var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);
+	function trimmedEndIndex(string) {
+	  var index = string.length;
 
-	        if (score === null) {
-	            return 'not_squarish';
-	        } else if (score === 0) {
-	            return 'square_enough';
-	        } else {
-	            return false;
-	        }
-	    };
+	  while (index-- && reWhitespace.test(string.charAt(index))) {}
 
+	  return index;
+	}
 
-	    action.transitionable = true;
+	/** Used to match leading whitespace. */
 
-	    return action;
+	var reTrimStart = /^\s+/;
+	/**
+	 * The base implementation of `_.trim`.
+	 *
+	 * @private
+	 * @param {string} string The string to trim.
+	 * @returns {string} Returns the trimmed string.
+	 */
+
+	function baseTrim(string) {
+	  return string ? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, '') : string;
 	}
 
-	// `actionRestrictTurn` creates a turn restriction relation.
-	//
-	// `turn` must be an `osmTurn` object
-	// see osm/intersection.js, pathToTurn()
-	//
-	// This specifies a restriction of type `restriction` when traveling from
-	// `turn.from.way` toward `turn.to.way` via `turn.via.node` OR `turn.via.ways`.
-	// (The action does not check that these entities form a valid intersection.)
-	//
-	// From, to, and via ways should be split before calling this action.
-	// (old versions of the code would split the ways here, but we no longer do it)
-	//
-	// For testing convenience, accepts a restrictionID to assign to the new
-	// relation. Normally, this will be undefined and the relation will
-	// automatically be assigned a new ID.
-	//
-	function actionRestrictTurn(turn, restrictionType, restrictionID) {
+	/**
+	 * Checks if `value` is the
+	 * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
+	 * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 0.1.0
+	 * @category Lang
+	 * @param {*} value The value to check.
+	 * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+	 * @example
+	 *
+	 * _.isObject({});
+	 * // => true
+	 *
+	 * _.isObject([1, 2, 3]);
+	 * // => true
+	 *
+	 * _.isObject(_.noop);
+	 * // => true
+	 *
+	 * _.isObject(null);
+	 * // => false
+	 */
+	function isObject$2(value) {
+	  var type = _typeof(value);
 
-	    return function(graph) {
-	        var fromWay = graph.entity(turn.from.way);
-	        var toWay = graph.entity(turn.to.way);
-	        var viaNode = turn.via.node && graph.entity(turn.via.node);
-	        var viaWays = turn.via.ways && turn.via.ways.map(function(id) { return graph.entity(id); });
-	        var members = [];
+	  return value != null && (type == 'object' || type == 'function');
+	}
 
-	        members.push({ id: fromWay.id, type: 'way',  role: 'from' });
+	/** Used as references for various `Number` constants. */
 
-	        if (viaNode) {
-	            members.push({ id: viaNode.id,  type: 'node', role: 'via' });
-	        } else if (viaWays) {
-	            viaWays.forEach(function(viaWay) {
-	                members.push({ id: viaWay.id,  type: 'way', role: 'via' });
-	            });
-	        }
+	var NAN = 0 / 0;
+	/** Used to detect bad signed hexadecimal string values. */
 
-	        members.push({ id: toWay.id, type: 'way',  role: 'to' });
+	var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+	/** Used to detect binary string values. */
 
-	        return graph.replace(osmRelation({
-	            id: restrictionID,
-	            tags: {
-	                type: 'restriction',
-	                restriction: restrictionType
-	            },
-	            members: members
-	        }));
-	    };
-	}
+	var reIsBinary = /^0b[01]+$/i;
+	/** Used to detect octal string values. */
 
-	function actionRevert(id) {
-	    var action = function(graph) {
-	        var entity = graph.hasEntity(id),
-	            base = graph.base().entities[id];
-
-	        if (entity && !base) {    // entity will be removed..
-	            if (entity.type === 'node') {
-	                graph.parentWays(entity)
-	                    .forEach(function(parent) {
-	                        parent = parent.removeNode(id);
-	                        graph = graph.replace(parent);
-
-	                        if (parent.isDegenerate()) {
-	                            graph = actionDeleteWay(parent.id)(graph);
-	                        }
-	                    });
-	            }
+	var reIsOctal = /^0o[0-7]+$/i;
+	/** Built-in method references without a dependency on `root`. */
 
-	            graph.parentRelations(entity)
-	                .forEach(function(parent) {
-	                    parent = parent.removeMembersWithID(id);
-	                    graph = graph.replace(parent);
+	var freeParseInt = parseInt;
+	/**
+	 * Converts `value` to a number.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 4.0.0
+	 * @category Lang
+	 * @param {*} value The value to process.
+	 * @returns {number} Returns the number.
+	 * @example
+	 *
+	 * _.toNumber(3.2);
+	 * // => 3.2
+	 *
+	 * _.toNumber(Number.MIN_VALUE);
+	 * // => 5e-324
+	 *
+	 * _.toNumber(Infinity);
+	 * // => Infinity
+	 *
+	 * _.toNumber('3.2');
+	 * // => 3.2
+	 */
 
-	                    if (parent.isDegenerate()) {
-	                        graph = actionDeleteRelation(parent.id)(graph);
-	                    }
-	                });
-	        }
+	function toNumber(value) {
+	  if (typeof value == 'number') {
+	    return value;
+	  }
 
-	        return graph.revert(id);
-	    };
+	  if (isSymbol(value)) {
+	    return NAN;
+	  }
 
-	    return action;
+	  if (isObject$2(value)) {
+	    var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
+	    value = isObject$2(other) ? other + '' : other;
+	  }
+
+	  if (typeof value != 'string') {
+	    return value === 0 ? value : +value;
+	  }
+
+	  value = baseTrim(value);
+	  var isBinary = reIsBinary.test(value);
+	  return isBinary || reIsOctal.test(value) ? freeParseInt(value.slice(2), isBinary ? 2 : 8) : reIsBadHex.test(value) ? NAN : +value;
 	}
 
-	function actionRotate(rotateIds, pivot, angle, projection) {
+	/**
+	 * Converts `value` to a string. An empty string is returned for `null`
+	 * and `undefined` values. The sign of `-0` is preserved.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 4.0.0
+	 * @category Lang
+	 * @param {*} value The value to convert.
+	 * @returns {string} Returns the converted string.
+	 * @example
+	 *
+	 * _.toString(null);
+	 * // => ''
+	 *
+	 * _.toString(-0);
+	 * // => '-0'
+	 *
+	 * _.toString([1, 2, 3]);
+	 * // => '1,2,3'
+	 */
 
-	    var action = function(graph) {
-	        return graph.update(function(graph) {
-	            utilGetAllNodes(rotateIds, graph).forEach(function(node) {
-	                var point = geoRotate([projection(node.loc)], angle, pivot)[0];
-	                graph = graph.replace(node.move(projection.invert(point)));
-	            });
-	        });
-	    };
+	function toString$3(value) {
+	  return value == null ? '' : baseToString(value);
+	}
 
-	    return action;
+	/**
+	 * The base implementation of `_.propertyOf` without support for deep paths.
+	 *
+	 * @private
+	 * @param {Object} object The object to query.
+	 * @returns {Function} Returns the new accessor function.
+	 */
+	function basePropertyOf(object) {
+	  return function (key) {
+	    return object == null ? undefined : object[key];
+	  };
 	}
 
-	/* Align nodes along their common axis */
-	function actionStraightenNodes(nodeIDs, projection) {
-
-	    function positionAlongWay(a, o, b) {
-	        return geoVecDot(a, b, o) / geoVecDot(b, b, o);
-	    }
+	/**
+	 * Gets the timestamp of the number of milliseconds that have elapsed since
+	 * the Unix epoch (1 January 1970 00:00:00 UTC).
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 2.4.0
+	 * @category Date
+	 * @returns {number} Returns the timestamp.
+	 * @example
+	 *
+	 * _.defer(function(stamp) {
+	 *   console.log(_.now() - stamp);
+	 * }, _.now());
+	 * // => Logs the number of milliseconds it took for the deferred invocation.
+	 */
 
-	    // returns the endpoints of the long axis of symmetry of the `points` bounding rect 
-	    function getEndpoints(points) {
-	        var ssr = geoGetSmallestSurroundingRectangle(points);
+	var now = function now() {
+	  return root.Date.now();
+	};
 
-	        // Choose line pq = axis of symmetry.
-	        // The shape's surrounding rectangle has 2 axes of symmetry.
-	        // Snap points to the long axis
-	        var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2 ];
-	        var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2 ];
-	        var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2 ];
-	        var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2 ];
+	/** Error message constants. */
 
-	        var isLong = (geoVecLength(p1, q1) > geoVecLength(p2, q2));
-	        if (isLong) {
-	            return [p1, q1];
-	        }
-	        return [p2, q2];
-	    }
+	var FUNC_ERROR_TEXT$1 = 'Expected a function';
+	/* Built-in method references for those with the same name as other `lodash` methods. */
 
+	var nativeMax = Math.max,
+	    nativeMin = Math.min;
+	/**
+	 * Creates a debounced function that delays invoking `func` until after `wait`
+	 * milliseconds have elapsed since the last time the debounced function was
+	 * invoked. The debounced function comes with a `cancel` method to cancel
+	 * delayed `func` invocations and a `flush` method to immediately invoke them.
+	 * Provide `options` to indicate whether `func` should be invoked on the
+	 * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
+	 * with the last arguments provided to the debounced function. Subsequent
+	 * calls to the debounced function return the result of the last `func`
+	 * invocation.
+	 *
+	 * **Note:** If `leading` and `trailing` options are `true`, `func` is
+	 * invoked on the trailing edge of the timeout only if the debounced function
+	 * is invoked more than once during the `wait` timeout.
+	 *
+	 * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+	 * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+	 *
+	 * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+	 * for details over the differences between `_.debounce` and `_.throttle`.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 0.1.0
+	 * @category Function
+	 * @param {Function} func The function to debounce.
+	 * @param {number} [wait=0] The number of milliseconds to delay.
+	 * @param {Object} [options={}] The options object.
+	 * @param {boolean} [options.leading=false]
+	 *  Specify invoking on the leading edge of the timeout.
+	 * @param {number} [options.maxWait]
+	 *  The maximum time `func` is allowed to be delayed before it's invoked.
+	 * @param {boolean} [options.trailing=true]
+	 *  Specify invoking on the trailing edge of the timeout.
+	 * @returns {Function} Returns the new debounced function.
+	 * @example
+	 *
+	 * // Avoid costly calculations while the window size is in flux.
+	 * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
+	 *
+	 * // Invoke `sendMail` when clicked, debouncing subsequent calls.
+	 * jQuery(element).on('click', _.debounce(sendMail, 300, {
+	 *   'leading': true,
+	 *   'trailing': false
+	 * }));
+	 *
+	 * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
+	 * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
+	 * var source = new EventSource('/stream');
+	 * jQuery(source).on('message', debounced);
+	 *
+	 * // Cancel the trailing debounced invocation.
+	 * jQuery(window).on('popstate', debounced.cancel);
+	 */
 
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
+	function debounce(func, wait, options) {
+	  var lastArgs,
+	      lastThis,
+	      maxWait,
+	      result,
+	      timerId,
+	      lastCallTime,
+	      lastInvokeTime = 0,
+	      leading = false,
+	      maxing = false,
+	      trailing = true;
 
-	        var nodes = nodeIDs.map(function(id) { return graph.entity(id); });
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var endpoints = getEndpoints(points);
-	        var startPoint = endpoints[0];
-	        var endPoint = endpoints[1];
+	  if (typeof func != 'function') {
+	    throw new TypeError(FUNC_ERROR_TEXT$1);
+	  }
 
-	        // Move points onto the line connecting the endpoints
-	        for (var i = 0; i < points.length; i++) {
-	            var node = nodes[i];
-	            var point = points[i];
-	            var u = positionAlongWay(point, startPoint, endPoint);
-	            var point2 = geoVecInterp(startPoint, endPoint, u);
-	            var loc2 = projection.invert(point2);
-	            graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
-	        }
+	  wait = toNumber(wait) || 0;
 
-	        return graph;
-	    };
+	  if (isObject$2(options)) {
+	    leading = !!options.leading;
+	    maxing = 'maxWait' in options;
+	    maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
+	    trailing = 'trailing' in options ? !!options.trailing : trailing;
+	  }
 
+	  function invokeFunc(time) {
+	    var args = lastArgs,
+	        thisArg = lastThis;
+	    lastArgs = lastThis = undefined;
+	    lastInvokeTime = time;
+	    result = func.apply(thisArg, args);
+	    return result;
+	  }
 
-	    action.disabled = function(graph) {
+	  function leadingEdge(time) {
+	    // Reset any `maxWait` timer.
+	    lastInvokeTime = time; // Start the timer for the trailing edge.
 
-	        var nodes = nodeIDs.map(function(id) { return graph.entity(id); });
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var endpoints = getEndpoints(points);
-	        var startPoint = endpoints[0];
-	        var endPoint = endpoints[1];
+	    timerId = setTimeout(timerExpired, wait); // Invoke the leading edge.
 
-	        var maxDistance = 0;
+	    return leading ? invokeFunc(time) : result;
+	  }
 
-	        for (var i = 0; i < points.length; i++) {
-	            var point = points[i];
-	            var u = positionAlongWay(point, startPoint, endPoint);
-	            var p = geoVecInterp(startPoint, endPoint, u);
-	            var dist = geoVecLength(p, point);
+	  function remainingWait(time) {
+	    var timeSinceLastCall = time - lastCallTime,
+	        timeSinceLastInvoke = time - lastInvokeTime,
+	        timeWaiting = wait - timeSinceLastCall;
+	    return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
+	  }
 
-	            if (!isNaN(dist) && dist > maxDistance) {
-	                maxDistance = dist;
-	            }
-	        }
+	  function shouldInvoke(time) {
+	    var timeSinceLastCall = time - lastCallTime,
+	        timeSinceLastInvoke = time - lastInvokeTime; // Either this is the first call, activity has stopped and we're at the
+	    // trailing edge, the system time has gone backwards and we're treating
+	    // it as the trailing edge, or we've hit the `maxWait` limit.
 
-	        if (maxDistance < 0.0001) {
-	            return 'straight_enough';
-	        }
-	    };
+	    return lastCallTime === undefined || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
+	  }
 
+	  function timerExpired() {
+	    var time = now();
 
-	    action.transitionable = true;
+	    if (shouldInvoke(time)) {
+	      return trailingEdge(time);
+	    } // Restart the timer.
 
 
-	    return action;
-	}
+	    timerId = setTimeout(timerExpired, remainingWait(time));
+	  }
 
-	/*
-	 * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
-	 */
-	function actionStraightenWay(selectedIDs, projection) {
+	  function trailingEdge(time) {
+	    timerId = undefined; // Only invoke if we have `lastArgs` which means `func` has been
+	    // debounced at least once.
 
-	    function positionAlongWay(a, o, b) {
-	        return geoVecDot(a, b, o) / geoVecDot(b, b, o);
+	    if (trailing && lastArgs) {
+	      return invokeFunc(time);
 	    }
 
-	    // Return all selected ways as a continuous, ordered array of nodes
-	    function allNodes(graph) {
-	        var nodes = [];
-	        var startNodes = [];
-	        var endNodes = [];
-	        var remainingWays = [];
-	        var selectedWays = selectedIDs.filter(function(w) {
-	            return graph.entity(w).type === 'way';
-	        });
-	        var selectedNodes = selectedIDs.filter(function(n) {
-	            return graph.entity(n).type === 'node';
-	        });
-
-	        for (var i = 0; i < selectedWays.length; i++) {
-	            var way = graph.entity(selectedWays[i]);
-	            nodes = way.nodes.slice(0);
-	            remainingWays.push(nodes);
-	            startNodes.push(nodes[0]);
-	            endNodes.push(nodes[nodes.length-1]);
-	        }
-
-	        // Remove duplicate end/startNodes (duplicate nodes cannot be at the line end,
-	        //   and need to be removed so currNode difference calculation below works)
-	        // i.e. ["n-1", "n-1", "n-2"] => ["n-2"]
-	        startNodes = startNodes.filter(function(n) {
-	            return startNodes.indexOf(n) === startNodes.lastIndexOf(n);
-	        });
-	        endNodes = endNodes.filter(function(n) {
-	            return endNodes.indexOf(n) === endNodes.lastIndexOf(n);
-	        });
+	    lastArgs = lastThis = undefined;
+	    return result;
+	  }
 
-	        // Choose the initial endpoint to start from
-	        var currNode = utilArrayDifference(startNodes, endNodes)
-	            .concat(utilArrayDifference(endNodes, startNodes))[0];
-	        var nextWay = [];
-	        nodes = [];
-
-	        // Create nested function outside of loop to avoid "function in loop" lint error
-	        var getNextWay = function(currNode, remainingWays) {
-	            return remainingWays.filter(function(way) {
-	                return way[0] === currNode || way[way.length-1] === currNode;
-	            })[0];
-	        };
+	  function cancel() {
+	    if (timerId !== undefined) {
+	      clearTimeout(timerId);
+	    }
 
-	        // Add nodes to end of nodes array, until all ways are added
-	        while (remainingWays.length) {
-	            nextWay = getNextWay(currNode, remainingWays);
-	            remainingWays = utilArrayDifference(remainingWays, [nextWay]);
+	    lastInvokeTime = 0;
+	    lastArgs = lastCallTime = lastThis = timerId = undefined;
+	  }
 
-	            if (nextWay[0] !== currNode) {
-	                nextWay.reverse();
-	            }
-	            nodes = nodes.concat(nextWay);
-	            currNode = nodes[nodes.length-1];
-	        }
+	  function flush() {
+	    return timerId === undefined ? result : trailingEdge(now());
+	  }
 
-	        // If user selected 2 nodes to straighten between, then slice nodes array to those nodes
-	        if (selectedNodes.length === 2) {
-	            var startNodeIdx = nodes.indexOf(selectedNodes[0]);
-	            var endNodeIdx = nodes.indexOf(selectedNodes[1]);
-	            var sortedStartEnd = [startNodeIdx, endNodeIdx];
+	  function debounced() {
+	    var time = now(),
+	        isInvoking = shouldInvoke(time);
+	    lastArgs = arguments;
+	    lastThis = this;
+	    lastCallTime = time;
 
-	            sortedStartEnd.sort(function(a, b) { return a - b; });
-	            nodes = nodes.slice(sortedStartEnd[0], sortedStartEnd[1]+1);
-	        }
+	    if (isInvoking) {
+	      if (timerId === undefined) {
+	        return leadingEdge(lastCallTime);
+	      }
 
-	        return nodes.map(function(n) { return graph.entity(n); });
+	      if (maxing) {
+	        // Handle invocations in a tight loop.
+	        clearTimeout(timerId);
+	        timerId = setTimeout(timerExpired, wait);
+	        return invokeFunc(lastCallTime);
+	      }
 	    }
 
-	    function shouldKeepNode(node, graph) {
-	        return graph.parentWays(node).length > 1 ||
-	            graph.parentRelations(node).length ||
-	            node.hasInterestingTags();
+	    if (timerId === undefined) {
+	      timerId = setTimeout(timerExpired, wait);
 	    }
 
+	    return result;
+	  }
 
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
-
-	        var nodes = allNodes(graph);
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var startPoint = points[0];
-	        var endPoint = points[points.length-1];
-	        var toDelete = [];
-	        var i;
-
-	        for (i = 1; i < points.length-1; i++) {
-	            var node = nodes[i];
-	            var point = points[i];
-
-	            if (t < 1 || shouldKeepNode(node, graph)) {
-	                var u = positionAlongWay(point, startPoint, endPoint);
-	                var p = geoVecInterp(startPoint, endPoint, u);
-	                var loc2 = projection.invert(p);
-	                graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
-
-	            } else {
-	                // safe to delete
-	                if (toDelete.indexOf(node) === -1) {
-	                    toDelete.push(node);
-	                }
-	            }
-	        }
-
-	        for (i = 0; i < toDelete.length; i++) {
-	            graph = actionDeleteNode(toDelete[i].id)(graph);
-	        }
-
-	        return graph;
-	    };
+	  debounced.cancel = cancel;
+	  debounced.flush = flush;
+	  return debounced;
+	}
 
+	/** Used to map characters to HTML entities. */
 
-	    action.disabled = function(graph) {
-	        // check way isn't too bendy
-	        var nodes = allNodes(graph);
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var startPoint = points[0];
-	        var endPoint = points[points.length-1];
-	        var threshold = 0.2 * geoVecLength(startPoint, endPoint);
-	        var i;
+	var htmlEscapes = {
+	  '&': '&amp;',
+	  '<': '&lt;',
+	  '>': '&gt;',
+	  '"': '&quot;',
+	  "'": '&#39;'
+	};
+	/**
+	 * Used by `_.escape` to convert characters to HTML entities.
+	 *
+	 * @private
+	 * @param {string} chr The matched character to escape.
+	 * @returns {string} Returns the escaped character.
+	 */
 
-	        if (threshold === 0) {
-	            return 'too_bendy';
-	        }
+	var escapeHtmlChar = basePropertyOf(htmlEscapes);
 
-	        var maxDistance = 0;
+	/** Used to match HTML entities and HTML characters. */
 
-	        for (i = 1; i < points.length - 1; i++) {
-	            var point = points[i];
-	            var u = positionAlongWay(point, startPoint, endPoint);
-	            var p = geoVecInterp(startPoint, endPoint, u);
-	            var dist = geoVecLength(p, point);
+	var reUnescapedHtml = /[&<>"']/g,
+	    reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
+	/**
+	 * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
+	 * corresponding HTML entities.
+	 *
+	 * **Note:** No other characters are escaped. To escape additional
+	 * characters use a third-party library like [_he_](https://mths.be/he).
+	 *
+	 * Though the ">" character is escaped for symmetry, characters like
+	 * ">" and "/" don't need escaping in HTML and have no special meaning
+	 * unless they're part of a tag or unquoted attribute value. See
+	 * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
+	 * (under "semi-related fun fact") for more details.
+	 *
+	 * When working with HTML you should always
+	 * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
+	 * XSS vectors.
+	 *
+	 * @static
+	 * @since 0.1.0
+	 * @memberOf _
+	 * @category String
+	 * @param {string} [string=''] The string to escape.
+	 * @returns {string} Returns the escaped string.
+	 * @example
+	 *
+	 * _.escape('fred, barney, & pebbles');
+	 * // => 'fred, barney, &amp; pebbles'
+	 */
 
-	            // to bendy if point is off by 20% of total start/end distance in projected space
-	            if (isNaN(dist) || dist > threshold) {
-	                return 'too_bendy';
-	            } else if (dist > maxDistance) {
-	                maxDistance = dist;
-	            }
-	        }
+	function escape$4(string) {
+	  string = toString$3(string);
+	  return string && reHasUnescapedHtml.test(string) ? string.replace(reUnescapedHtml, escapeHtmlChar) : string;
+	}
 
-	        var keepingAllNodes = nodes.every(function(node, i) {
-	            return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
-	        });
+	/** Error message constants. */
 
-	        if (maxDistance < 0.0001 &&
-	            // Allow straightening even if already straight in order to remove extraneous nodes
-	            keepingAllNodes) {
-	            return 'straight_enough';
-	        }
-	    };
+	var FUNC_ERROR_TEXT = 'Expected a function';
+	/**
+	 * Creates a throttled function that only invokes `func` at most once per
+	 * every `wait` milliseconds. The throttled function comes with a `cancel`
+	 * method to cancel delayed `func` invocations and a `flush` method to
+	 * immediately invoke them. Provide `options` to indicate whether `func`
+	 * should be invoked on the leading and/or trailing edge of the `wait`
+	 * timeout. The `func` is invoked with the last arguments provided to the
+	 * throttled function. Subsequent calls to the throttled function return the
+	 * result of the last `func` invocation.
+	 *
+	 * **Note:** If `leading` and `trailing` options are `true`, `func` is
+	 * invoked on the trailing edge of the timeout only if the throttled function
+	 * is invoked more than once during the `wait` timeout.
+	 *
+	 * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+	 * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+	 *
+	 * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+	 * for details over the differences between `_.throttle` and `_.debounce`.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 0.1.0
+	 * @category Function
+	 * @param {Function} func The function to throttle.
+	 * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
+	 * @param {Object} [options={}] The options object.
+	 * @param {boolean} [options.leading=true]
+	 *  Specify invoking on the leading edge of the timeout.
+	 * @param {boolean} [options.trailing=true]
+	 *  Specify invoking on the trailing edge of the timeout.
+	 * @returns {Function} Returns the new throttled function.
+	 * @example
+	 *
+	 * // Avoid excessively updating the position while scrolling.
+	 * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
+	 *
+	 * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
+	 * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
+	 * jQuery(element).on('click', throttled);
+	 *
+	 * // Cancel the trailing throttled invocation.
+	 * jQuery(window).on('popstate', throttled.cancel);
+	 */
 
-	    action.transitionable = true;
+	function throttle(func, wait, options) {
+	  var leading = true,
+	      trailing = true;
 
+	  if (typeof func != 'function') {
+	    throw new TypeError(FUNC_ERROR_TEXT);
+	  }
 
-	    return action;
-	}
+	  if (isObject$2(options)) {
+	    leading = 'leading' in options ? !!options.leading : leading;
+	    trailing = 'trailing' in options ? !!options.trailing : trailing;
+	  }
 
-	// `actionUnrestrictTurn` deletes a turn restriction relation.
-	//
-	// `turn` must be an `osmTurn` object with a `restrictionID` property.
-	// see osm/intersection.js, pathToTurn()
-	//
-	function actionUnrestrictTurn(turn) {
-	    return function(graph) {
-	        return actionDeleteRelation(turn.restrictionID)(graph);
-	    };
+	  return debounce(func, wait, {
+	    'leading': leading,
+	    'maxWait': wait,
+	    'trailing': trailing
+	  });
 	}
 
-	/* Reflect the given area around its axis of symmetry */
-	function actionReflect(reflectIds, projection) {
-	    var _useLongAxis = true;
-
-
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
-
-	        var nodes = utilGetAllNodes(reflectIds, graph);
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var ssr = geoGetSmallestSurroundingRectangle(points);
-
-	        // Choose line pq = axis of symmetry.
-	        // The shape's surrounding rectangle has 2 axes of symmetry.
-	        // Reflect across the longer axis by default.
-	        var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2 ];
-	        var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2 ];
-	        var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2 ];
-	        var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2 ];
-	        var p, q;
-
-	        var isLong = (geoVecLength(p1, q1) > geoVecLength(p2, q2));
-	        if ((_useLongAxis && isLong) || (!_useLongAxis && !isLong)) {
-	            p = p1;
-	            q = q1;
-	        } else {
-	            p = p2;
-	            q = q2;
-	        }
-
-	        // reflect c across pq
-	        // http://math.stackexchange.com/questions/65503/point-reflection-over-a-line
-	        var dx = q[0] - p[0];
-	        var dy = q[1] - p[1];
-	        var a = (dx * dx - dy * dy) / (dx * dx + dy * dy);
-	        var b = 2 * dx * dy / (dx * dx + dy * dy);
-	        for (var i = 0; i < nodes.length; i++) {
-	            var node = nodes[i];
-	            var c = projection(node.loc);
-	            var c2 = [
-	                a * (c[0] - p[0]) + b * (c[1] - p[1]) + p[0],
-	                b * (c[0] - p[0]) - a * (c[1] - p[1]) + p[1]
-	            ];
-	            var loc2 = projection.invert(c2);
-	            node = node.move(geoVecInterp(node.loc, loc2, t));
-	            graph = graph.replace(node);
-	        }
+	var $$f = _export;
+	var lastIndexOf = arrayLastIndexOf;
 
-	        return graph;
-	    };
+	// `Array.prototype.lastIndexOf` method
+	// https://tc39.es/ecma262/#sec-array.prototype.lastindexof
+	// eslint-disable-next-line es/no-array-prototype-lastindexof -- required for testing
+	$$f({ target: 'Array', proto: true, forced: lastIndexOf !== [].lastIndexOf }, {
+	  lastIndexOf: lastIndexOf
+	});
 
+	/** Used to map HTML entities to characters. */
 
-	    action.useLongAxis = function(val) {
-	        if (!arguments.length) { return _useLongAxis; }
-	        _useLongAxis = val;
-	        return action;
-	    };
+	var htmlUnescapes = {
+	  '&amp;': '&',
+	  '&lt;': '<',
+	  '&gt;': '>',
+	  '&quot;': '"',
+	  '&#39;': "'"
+	};
+	/**
+	 * Used by `_.unescape` to convert HTML entities to characters.
+	 *
+	 * @private
+	 * @param {string} chr The matched character to unescape.
+	 * @returns {string} Returns the unescaped character.
+	 */
 
+	var unescapeHtmlChar = basePropertyOf(htmlUnescapes);
 
-	    action.transitionable = true;
+	/** Used to match HTML entities and HTML characters. */
 
+	var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
+	    reHasEscapedHtml = RegExp(reEscapedHtml.source);
+	/**
+	 * The inverse of `_.escape`; this method converts the HTML entities
+	 * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to
+	 * their corresponding characters.
+	 *
+	 * **Note:** No other HTML entities are unescaped. To unescape additional
+	 * HTML entities use a third-party library like [_he_](https://mths.be/he).
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 0.6.0
+	 * @category String
+	 * @param {string} [string=''] The string to unescape.
+	 * @returns {string} Returns the unescaped string.
+	 * @example
+	 *
+	 * _.unescape('fred, barney, &amp; pebbles');
+	 * // => 'fred, barney, & pebbles'
+	 */
 
-	    return action;
+	function unescape$3(string) {
+	  string = toString$3(string);
+	  return string && reHasEscapedHtml.test(string) ? string.replace(reEscapedHtml, unescapeHtmlChar) : string;
 	}
 
-	function actionUpgradeTags(entityId, oldTags, replaceTags) {
-
-	    return function(graph) {
-	        var entity = graph.entity(entityId);
-	        var tags = Object.assign({}, entity.tags);  // shallow copy
-	        var transferValue;
-	        var semiIndex;
+	var global$4 = global$1o;
+	var isArray = isArray$8;
+	var lengthOfArrayLike$1 = lengthOfArrayLike$i;
+	var bind$3 = functionBindContext;
 
-	        for (var oldTagKey in oldTags) {
-	            if (oldTags[oldTagKey] === '*') {
-	                transferValue = tags[oldTagKey];
-	                delete tags[oldTagKey];
-	            } else {
-	                var vals = tags[oldTagKey].split(';').filter(Boolean);
-	                var oldIndex = vals.indexOf(oldTags[oldTagKey]);
-	                if (vals.length === 1 || oldIndex === -1) {
-	                    delete tags[oldTagKey];
-	                } else {
-	                    if (replaceTags && replaceTags[oldTagKey]) {
-	                        // replacing a value within a semicolon-delimited value, note the index
-	                        semiIndex = oldIndex;
-	                    }
-	                    vals.splice(oldIndex, 1);
-	                    tags[oldTagKey] = vals.join(';');
-	                }
-	            }
-	        }
+	var TypeError$2 = global$4.TypeError;
 
-	        if (replaceTags) {
-	            for (var replaceKey in replaceTags) {
-	                var replaceValue = replaceTags[replaceKey];
-	                if (replaceValue === '*') {
-	                    if (tags[replaceKey] && tags[replaceKey] !== 'no') {
-	                        // allow any pre-existing value except `no` (troll tag)
-	                        continue;
-	                    } else {
-	                        // otherwise assume `yes` is okay
-	                        tags[replaceKey] = 'yes';
-	                    }
-	                } else if (replaceValue === '$1') {
-	                    tags[replaceKey] = transferValue;
-	                } else {
-	                    if (tags[replaceKey] && oldTags[replaceKey] && semiIndex !== undefined) {
-	                        // don't override preexisting values
-	                        var existingVals = tags[replaceKey].split(';').filter(Boolean);
-	                        if (existingVals.indexOf(replaceValue) === -1) {
-	                            existingVals.splice(semiIndex, 0, replaceValue);
-	                            tags[replaceKey] = existingVals.join(';');
-	                        }
-	                    } else {
-	                        tags[replaceKey] = replaceValue;
-	                    }
-	                }
-	            }
-	        }
+	// `FlattenIntoArray` abstract operation
+	// https://tc39.github.io/proposal-flatMap/#sec-FlattenIntoArray
+	var flattenIntoArray$1 = function (target, original, source, sourceLen, start, depth, mapper, thisArg) {
+	  var targetIndex = start;
+	  var sourceIndex = 0;
+	  var mapFn = mapper ? bind$3(mapper, thisArg) : false;
+	  var element, elementLen;
 
-	        return graph.replace(entity.update({ tags: tags }));
-	    };
-	}
+	  while (sourceIndex < sourceLen) {
+	    if (sourceIndex in source) {
+	      element = mapFn ? mapFn(source[sourceIndex], sourceIndex, original) : source[sourceIndex];
 
-	function behaviorEdit(context) {
+	      if (depth > 0 && isArray(element)) {
+	        elementLen = lengthOfArrayLike$1(element);
+	        targetIndex = flattenIntoArray$1(target, original, element, elementLen, targetIndex, depth - 1) - 1;
+	      } else {
+	        if (targetIndex >= 0x1FFFFFFFFFFFFF) throw TypeError$2('Exceed the acceptable array length');
+	        target[targetIndex] = element;
+	      }
 
-	    function behavior() {
-	        context.map()
-	            .minzoom(context.minEditableZoom());
+	      targetIndex++;
 	    }
+	    sourceIndex++;
+	  }
+	  return targetIndex;
+	};
 
+	var flattenIntoArray_1 = flattenIntoArray$1;
 
-	    behavior.off = function() {
-	        context.map()
-	            .minzoom(0);
-	    };
-
-	    return behavior;
-	}
+	var $$e = _export;
+	var flattenIntoArray = flattenIntoArray_1;
+	var aCallable = aCallable$a;
+	var toObject = toObject$i;
+	var lengthOfArrayLike = lengthOfArrayLike$i;
+	var arraySpeciesCreate = arraySpeciesCreate$4;
 
-	/*
-	   The hover behavior adds the `.hover` class on pointerover to all elements to which
-	   the identical datum is bound, and removes it on pointerout.
+	// `Array.prototype.flatMap` method
+	// https://tc39.es/ecma262/#sec-array.prototype.flatmap
+	$$e({ target: 'Array', proto: true }, {
+	  flatMap: function flatMap(callbackfn /* , thisArg */) {
+	    var O = toObject(this);
+	    var sourceLen = lengthOfArrayLike(O);
+	    var A;
+	    aCallable(callbackfn);
+	    A = arraySpeciesCreate(O, 0);
+	    A.length = flattenIntoArray(A, O, O, sourceLen, 0, 1, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	    return A;
+	  }
+	});
 
-	   The :hover pseudo-class is insufficient for iD's purposes because a datum's visual
-	   representation may consist of several elements scattered throughout the DOM hierarchy.
-	   Only one of these elements can have the :hover pseudo-class, but all of them will
-	   have the .hover class.
-	 */
-	function behaviorHover(context) {
-	    var dispatch$1 = dispatch('hover');
-	    var _selection = select(null);
-	    var _newNodeId = null;
-	    var _initialNodeID = null;
-	    var _altDisables;
-	    var _ignoreVertex;
-	    var _targets = [];
+	// this method was added to unscopables after implementation
+	// in popular engines, so it's moved to a separate module
+	var addToUnscopables = addToUnscopables$6;
+
+	// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables('flatMap');
+
+	var $$d = _export;
+	var uncurryThis$6 = functionUncurryThis;
+	var getOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
+	var toLength$2 = toLength$c;
+	var toString$2 = toString$k;
+	var notARegExp$1 = notARegexp;
+	var requireObjectCoercible$2 = requireObjectCoercible$e;
+	var correctIsRegExpLogic$1 = correctIsRegexpLogic;
+
+	// eslint-disable-next-line es/no-string-prototype-endswith -- safe
+	var un$EndsWith = uncurryThis$6(''.endsWith);
+	var slice$2 = uncurryThis$6(''.slice);
+	var min$1 = Math.min;
+
+	var CORRECT_IS_REGEXP_LOGIC$1 = correctIsRegExpLogic$1('endsWith');
+	// https://github.com/zloirock/core-js/pull/702
+	var MDN_POLYFILL_BUG$1 = !CORRECT_IS_REGEXP_LOGIC$1 && !!function () {
+	  var descriptor = getOwnPropertyDescriptor$1(String.prototype, 'endsWith');
+	  return descriptor && !descriptor.writable;
+	}();
+
+	// `String.prototype.endsWith` method
+	// https://tc39.es/ecma262/#sec-string.prototype.endswith
+	$$d({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG$1 && !CORRECT_IS_REGEXP_LOGIC$1 }, {
+	  endsWith: function endsWith(searchString /* , endPosition = @length */) {
+	    var that = toString$2(requireObjectCoercible$2(this));
+	    notARegExp$1(searchString);
+	    var endPosition = arguments.length > 1 ? arguments[1] : undefined;
+	    var len = that.length;
+	    var end = endPosition === undefined ? len : min$1(toLength$2(endPosition), len);
+	    var search = toString$2(searchString);
+	    return un$EndsWith
+	      ? un$EndsWith(that, search, end)
+	      : slice$2(that, end - search.length, end) === search;
+	  }
+	});
 
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	// https://github.com/tc39/proposal-string-pad-start-end
+	var uncurryThis$5 = functionUncurryThis;
+	var toLength$1 = toLength$c;
+	var toString$1 = toString$k;
+	var $repeat = stringRepeat;
+	var requireObjectCoercible$1 = requireObjectCoercible$e;
+
+	var repeat$1 = uncurryThis$5($repeat);
+	var stringSlice$2 = uncurryThis$5(''.slice);
+	var ceil = Math.ceil;
+
+	// `String.prototype.{ padStart, padEnd }` methods implementation
+	var createMethod = function (IS_END) {
+	  return function ($this, maxLength, fillString) {
+	    var S = toString$1(requireObjectCoercible$1($this));
+	    var intMaxLength = toLength$1(maxLength);
+	    var stringLength = S.length;
+	    var fillStr = fillString === undefined ? ' ' : toString$1(fillString);
+	    var fillLen, stringFiller;
+	    if (intMaxLength <= stringLength || fillStr == '') return S;
+	    fillLen = intMaxLength - stringLength;
+	    stringFiller = repeat$1(fillStr, ceil(fillLen / fillStr.length));
+	    if (stringFiller.length > fillLen) stringFiller = stringSlice$2(stringFiller, 0, fillLen);
+	    return IS_END ? S + stringFiller : stringFiller + S;
+	  };
+	};
+
+	var stringPad = {
+	  // `String.prototype.padStart` method
+	  // https://tc39.es/ecma262/#sec-string.prototype.padstart
+	  start: createMethod(false),
+	  // `String.prototype.padEnd` method
+	  // https://tc39.es/ecma262/#sec-string.prototype.padend
+	  end: createMethod(true)
+	};
+
+	// https://github.com/zloirock/core-js/issues/280
+	var userAgent = engineUserAgent;
+
+	var stringPadWebkitBug = /Version\/10(?:\.\d+){1,2}(?: [\w./]+)?(?: Mobile\/\w+)? Safari\//.test(userAgent);
+
+	var $$c = _export;
+	var $padEnd = stringPad.end;
+	var WEBKIT_BUG$1 = stringPadWebkitBug;
+
+	// `String.prototype.padEnd` method
+	// https://tc39.es/ecma262/#sec-string.prototype.padend
+	$$c({ target: 'String', proto: true, forced: WEBKIT_BUG$1 }, {
+	  padEnd: function padEnd(maxLength /* , fillString = ' ' */) {
+	    return $padEnd(this, maxLength, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
+	var $$b = _export;
+	var $padStart = stringPad.start;
+	var WEBKIT_BUG = stringPadWebkitBug;
 
-	    function keydown() {
-	        if (_altDisables && event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            _selection.selectAll('.hover')
-	                .classed('hover-suppressed', true)
-	                .classed('hover', false);
+	// `String.prototype.padStart` method
+	// https://tc39.es/ecma262/#sec-string.prototype.padstart
+	$$b({ target: 'String', proto: true, forced: WEBKIT_BUG }, {
+	  padStart: function padStart(maxLength /* , fillString = ' ' */) {
+	    return $padStart(this, maxLength, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	            _selection
-	                .classed('hover-disabled', true);
+	var $$a = _export;
+	var $reduceRight = arrayReduce.right;
+	var arrayMethodIsStrict = arrayMethodIsStrict$9;
+	var CHROME_VERSION = engineV8Version;
+	var IS_NODE = engineIsNode;
 
-	            dispatch$1.call('hover', this, null);
-	        }
-	    }
+	var STRICT_METHOD = arrayMethodIsStrict('reduceRight');
+	// Chrome 80-82 has a critical bug
+	// https://bugs.chromium.org/p/chromium/issues/detail?id=1049982
+	var CHROME_BUG = !IS_NODE && CHROME_VERSION > 79 && CHROME_VERSION < 83;
 
+	// `Array.prototype.reduceRight` method
+	// https://tc39.es/ecma262/#sec-array.prototype.reduceright
+	$$a({ target: 'Array', proto: true, forced: !STRICT_METHOD || CHROME_BUG }, {
+	  reduceRight: function reduceRight(callbackfn /* , initialValue */) {
+	    return $reduceRight(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	    function keyup() {
-	        if (_altDisables && event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            _selection.selectAll('.hover-suppressed')
-	                .classed('hover-suppressed', false)
-	                .classed('hover', true);
+	var $$9 = _export;
+	var repeat = stringRepeat;
 
-	            _selection
-	                .classed('hover-disabled', false);
+	// `String.prototype.repeat` method
+	// https://tc39.es/ecma262/#sec-string.prototype.repeat
+	$$9({ target: 'String', proto: true }, {
+	  repeat: repeat
+	});
 
-	            dispatch$1.call('hover', this, _targets);
-	        }
-	    }
+	var $$8 = _export;
+	var uncurryThis$4 = functionUncurryThis;
+	var getOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+	var toLength = toLength$c;
+	var toString = toString$k;
+	var notARegExp = notARegexp;
+	var requireObjectCoercible = requireObjectCoercible$e;
+	var correctIsRegExpLogic = correctIsRegexpLogic;
+
+	// eslint-disable-next-line es/no-string-prototype-startswith -- safe
+	var un$StartsWith = uncurryThis$4(''.startsWith);
+	var stringSlice$1 = uncurryThis$4(''.slice);
+	var min = Math.min;
 
+	var CORRECT_IS_REGEXP_LOGIC = correctIsRegExpLogic('startsWith');
+	// https://github.com/zloirock/core-js/pull/702
+	var MDN_POLYFILL_BUG = !CORRECT_IS_REGEXP_LOGIC && !!function () {
+	  var descriptor = getOwnPropertyDescriptor(String.prototype, 'startsWith');
+	  return descriptor && !descriptor.writable;
+	}();
+
+	// `String.prototype.startsWith` method
+	// https://tc39.es/ecma262/#sec-string.prototype.startswith
+	$$8({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG && !CORRECT_IS_REGEXP_LOGIC }, {
+	  startsWith: function startsWith(searchString /* , position = 0 */) {
+	    var that = toString(requireObjectCoercible(this));
+	    notARegExp(searchString);
+	    var index = toLength(min(arguments.length > 1 ? arguments[1] : undefined, that.length));
+	    var search = toString(searchString);
+	    return un$StartsWith
+	      ? un$StartsWith(that, search, index)
+	      : stringSlice$1(that, index, index + search.length) === search;
+	  }
+	});
 
-	    function behavior(selection) {
-	        _selection = selection;
+	var $$7 = _export;
+	var $trimEnd = stringTrim.end;
+	var forcedStringTrimMethod$1 = stringTrimForced;
 
-	        _targets = [];
+	var FORCED$4 = forcedStringTrimMethod$1('trimEnd');
 
-	        if (_initialNodeID) {
-	            _newNodeId = _initialNodeID;
-	            _initialNodeID = null;
-	        } else {
-	            _newNodeId = null;
-	        }
+	var trimEnd = FORCED$4 ? function trimEnd() {
+	  return $trimEnd(this);
+	// eslint-disable-next-line es/no-string-prototype-trimstart-trimend -- safe
+	} : ''.trimEnd;
 
-	        _selection
-	            .on(_pointerPrefix + 'over.hover', pointerover)
-	            .on(_pointerPrefix + 'out.hover', pointerout)
-	            // treat pointerdown as pointerover for touch devices
-	            .on(_pointerPrefix + 'down.hover', pointerover);
+	// `String.prototype.{ trimEnd, trimRight }` methods
+	// https://tc39.es/ecma262/#sec-string.prototype.trimend
+	// https://tc39.es/ecma262/#String.prototype.trimright
+	$$7({ target: 'String', proto: true, name: 'trimEnd', forced: FORCED$4 }, {
+	  trimEnd: trimEnd,
+	  trimRight: trimEnd
+	});
 
-	        select(window)
-	            .on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true)
-	            .on('keydown.hover', keydown)
-	            .on('keyup.hover', keyup);
+	var $$6 = _export;
+	var $trimStart = stringTrim.start;
+	var forcedStringTrimMethod = stringTrimForced;
 
+	var FORCED$3 = forcedStringTrimMethod('trimStart');
 
-	        function eventTarget() {
-	            var datum = event.target && event.target.__data__;
-	            if (typeof datum !== 'object') { return null; }
-	            if (!(datum instanceof osmEntity) && datum.properties && (datum.properties.entity instanceof osmEntity)) {
-	                return datum.properties.entity;
-	            }
-	            return datum;
-	        }
+	var trimStart = FORCED$3 ? function trimStart() {
+	  return $trimStart(this);
+	// eslint-disable-next-line es/no-string-prototype-trimstart-trimend -- safe
+	} : ''.trimStart;
 
-	        function pointerover() {
-	            // ignore mouse hovers with buttons pressed unless dragging
-	            if (context.mode().id.indexOf('drag') === -1 &&
-	                (!event.pointerType || event.pointerType === 'mouse') &&
-	                event.buttons) { return; }
+	// `String.prototype.{ trimStart, trimLeft }` methods
+	// https://tc39.es/ecma262/#sec-string.prototype.trimstart
+	// https://tc39.es/ecma262/#String.prototype.trimleft
+	$$6({ target: 'String', proto: true, name: 'trimStart', forced: FORCED$3 }, {
+	  trimStart: trimStart,
+	  trimLeft: trimStart
+	});
 
-	            var target = eventTarget();
-	            if (target && _targets.indexOf(target) === -1) {
-	                _targets.push(target);
-	                updateHover(_targets);
-	            }
-	        }
+	var _mainLocalizer = coreLocalizer(); // singleton
 
-	        function pointerout() {
 
-	            var target = eventTarget();
-	            var index = _targets.indexOf(target);
-	            if (index !== -1) {
-	                _targets.splice(index);
-	                updateHover(_targets);
-	            }
-	        }
+	var _t = _mainLocalizer.t;
+	// coreLocalizer manages language and locale parameters including translated strings
+	//
 
-	        function allowsVertex(d) {
-	            return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
-	        }
+	function coreLocalizer() {
+	  var localizer = {};
+	  var _dataLanguages = {}; // `_dataLocales` is an object containing all _supported_ locale codes -> language info.
+	  // * `rtl` - right-to-left or left-to-right text direction
+	  // * `pct` - the percent of strings translated; 1 = 100%, full coverage
+	  //
+	  // {
+	  // en: { rtl: false, pct: {…} },
+	  // de: { rtl: false, pct: {…} },
+	  // …
+	  // }
 
-	        function modeAllowsHover(target) {
-	            var mode = context.mode();
-	            if (mode.id === 'add-point') {
-	                return mode.preset.matchGeometry('vertex') ||
-	                    (target.type !== 'way' && target.geometry(context.graph()) !== 'vertex');
-	            }
-	            return true;
-	        }
+	  var _dataLocales = {}; // `localeStrings` is an object containing all _loaded_ locale codes -> string data.
+	  // {
+	  // en: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
+	  // de: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
+	  // …
+	  // }
 
-	        function updateHover(targets) {
+	  var _localeStrings = {}; // the current locale
 
-	            _selection.selectAll('.hover')
-	                .classed('hover', false);
-	            _selection.selectAll('.hover-suppressed')
-	                .classed('hover-suppressed', false);
+	  var _localeCode = 'en-US'; // `_localeCodes` must contain `_localeCode` first, optionally followed by fallbacks
 
-	            var mode = context.mode();
+	  var _localeCodes = ['en-US', 'en'];
+	  var _languageCode = 'en';
+	  var _textDirection = 'ltr';
+	  var _usesMetric = false;
+	  var _languageNames = {};
+	  var _scriptNames = {}; // getters for the current locale parameters
 
-	            if (!_newNodeId && (mode.id === 'draw-line' || mode.id === 'draw-area')) {
-	                var node = targets.find(function(target) {
-	                    return target instanceof osmEntity && target.type === 'node';
-	                });
-	                _newNodeId = node && node.id;
-	            }
+	  localizer.localeCode = function () {
+	    return _localeCode;
+	  };
 
-	            targets = targets.filter(function(datum) {
-	                if (datum instanceof osmEntity) {
-	                    // If drawing a way, don't hover on a node that was just placed. #3974
-	                    return datum.id !== _newNodeId &&
-	                        (datum.type !== 'node' || !_ignoreVertex || allowsVertex(datum)) &&
-	                        modeAllowsHover(datum);
-	                }
-	                return true;
-	            });
+	  localizer.localeCodes = function () {
+	    return _localeCodes;
+	  };
 
-	            var selector = '';
+	  localizer.languageCode = function () {
+	    return _languageCode;
+	  };
 
-	            for (var i in targets) {
-	                var datum = targets[i];
+	  localizer.textDirection = function () {
+	    return _textDirection;
+	  };
 
-	                // What are we hovering over?
-	                if (datum.__featurehash__) {
-	                    // hovering custom data
-	                    selector += ', .data' + datum.__featurehash__;
+	  localizer.usesMetric = function () {
+	    return _usesMetric;
+	  };
 
-	                } else if (datum instanceof QAItem) {
-	                    selector += ', .' + datum.service + '.itemId-' + datum.id;
+	  localizer.languageNames = function () {
+	    return _languageNames;
+	  };
 
-	                } else if (datum instanceof osmNote) {
-	                    selector += ', .note-' + datum.id;
+	  localizer.scriptNames = function () {
+	    return _scriptNames;
+	  }; // The client app may want to manually set the locale, regardless of the
+	  // settings provided by the browser
 
-	                } else if (datum instanceof osmEntity) {
-	                    selector += ', .' + datum.id;
-	                    if (datum.type === 'relation') {
-	                        for (var j in datum.members) {
-	                            selector += ', .' + datum.members[j].id;
-	                        }
-	                    }
-	                }
-	            }
 
-	            var suppressed = _altDisables && event && event.altKey;
+	  var _preferredLocaleCodes = [];
 
-	            if (selector.trim().length) {
-	                // remove the first comma
-	                selector = selector.slice(1);
-	                _selection.selectAll(selector)
-	                    .classed(suppressed ? 'hover-suppressed' : 'hover', true);
-	            }
+	  localizer.preferredLocaleCodes = function (codes) {
+	    if (!arguments.length) return _preferredLocaleCodes;
 
-	            dispatch$1.call('hover', this, !suppressed && targets);
-	        }
+	    if (typeof codes === 'string') {
+	      // be generous and accept delimited strings as input
+	      _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
+	    } else {
+	      _preferredLocaleCodes = codes;
 	    }
 
+	    return localizer;
+	  };
 
-	    behavior.off = function(selection) {
-	        selection.selectAll('.hover')
-	            .classed('hover', false);
-	        selection.selectAll('.hover-suppressed')
-	            .classed('hover-suppressed', false);
-	        selection
-	            .classed('hover-disabled', false);
-
-	        selection
-	            .on(_pointerPrefix + 'over.hover', null)
-	            .on(_pointerPrefix + 'out.hover', null)
-	            .on(_pointerPrefix + 'down.hover', null);
+	  var _loadPromise;
 
-	        select(window)
-	            .on(_pointerPrefix + 'up.hover pointercancel.hover', null, true)
-	            .on('keydown.hover', null)
-	            .on('keyup.hover', null);
+	  localizer.ensureLoaded = function () {
+	    if (_loadPromise) return _loadPromise;
+	    var filesToFetch = ['languages', // load the list of languages
+	    'locales' // load the list of supported locales
+	    ];
+	    var localeDirs = {
+	      general: 'locales',
+	      tagging: 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/translations'
 	    };
+	    var fileMap = _mainFileFetcher.fileMap();
 
+	    for (var scopeId in localeDirs) {
+	      var key = "locales_index_".concat(scopeId);
 
-	    behavior.altDisables = function(val) {
-	        if (!arguments.length) { return _altDisables; }
-	        _altDisables = val;
-	        return behavior;
-	    };
-
-	    behavior.ignoreVertex = function(val) {
-	        if (!arguments.length) { return _ignoreVertex; }
-	        _ignoreVertex = val;
-	        return behavior;
-	    };
+	      if (!fileMap[key]) {
+	        fileMap[key] = localeDirs[scopeId] + '/index.min.json';
+	      }
 
-	    behavior.initialNodeID = function(nodeId) {
-	        _initialNodeID = nodeId;
-	        return behavior;
-	    };
+	      filesToFetch.push(key);
+	    }
 
-	    return utilRebind(behavior, dispatch$1, 'on');
-	}
+	    return _loadPromise = Promise.all(filesToFetch.map(function (key) {
+	      return _mainFileFetcher.get(key);
+	    })).then(function (results) {
+	      _dataLanguages = results[0];
+	      _dataLocales = results[1];
+	      var indexes = results.slice(2);
 
-	var _disableSpace = false;
-	var _lastSpace = null;
+	      var requestedLocales = (_preferredLocaleCodes || []).concat(utilDetect().browserLocales) // List of locales preferred by the browser in priority order.
+	      .concat(['en']); // fallback to English since it's the only guaranteed complete language
 
 
-	function behaviorDraw(context) {
-	    var dispatch$1 = dispatch(
-	        'move', 'down', 'downcancel', 'click', 'clickWay', 'clickNode', 'undo', 'cancel', 'finish'
-	    );
+	      _localeCodes = localesToUseFrom(requestedLocales);
+	      _localeCode = _localeCodes[0]; // Run iD in the highest-priority locale; the rest are fallbacks
 
-	    var keybinding = utilKeybinding('draw');
+	      var loadStringsPromises = [];
+	      indexes.forEach(function (index, i) {
+	        // Will always return the index for `en` if nothing else
+	        var fullCoverageIndex = _localeCodes.findIndex(function (locale) {
+	          return index[locale] && index[locale].pct === 1;
+	        }); // We only need to load locales up until we find one with full coverage
 
-	    var _hover = behaviorHover(context)
-	        .altDisables(true)
-	        .ignoreVertex(true)
-	        .on('hover', context.ui().sidebar.hover);
-	    var _edit = behaviorEdit(context);
 
-	    var _closeTolerance = 4;
-	    var _tolerance = 12;
-	    var _mouseLeave = false;
-	    var _lastMouse = null;
-	    var _lastPointerUpEvent;
+	        _localeCodes.slice(0, fullCoverageIndex + 1).forEach(function (code) {
+	          var scopeId = Object.keys(localeDirs)[i];
+	          var directory = Object.values(localeDirs)[i];
+	          if (index[code]) loadStringsPromises.push(localizer.loadLocale(code, scopeId, directory));
+	        });
+	      });
+	      return Promise.all(loadStringsPromises);
+	    }).then(function () {
+	      updateForCurrentLocale();
+	    })["catch"](function (err) {
+	      return console.error(err);
+	    }); // eslint-disable-line
+	  }; // Returns the locales from `requestedLocales` supported by iD that we should use
+
+
+	  function localesToUseFrom(requestedLocales) {
+	    var supportedLocales = _dataLocales;
+	    var toUse = [];
+
+	    for (var i in requestedLocales) {
+	      var locale = requestedLocales[i];
+	      if (supportedLocales[locale]) toUse.push(locale);
+
+	      if (locale.includes('-')) {
+	        // Full locale ('es-ES'), add fallback to the base ('es')
+	        var langPart = locale.split('-')[0];
+	        if (supportedLocales[langPart]) toUse.push(langPart);
+	      }
+	    } // remove duplicates
 
-	    var _downPointer;
 
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	    return utilArrayUniq(toUse);
+	  }
 
+	  function updateForCurrentLocale() {
+	    if (!_localeCode) return;
+	    _languageCode = _localeCode.split('-')[0];
+	    var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
+	    var hash = utilStringQs(window.location.hash);
 
-	    // related code
-	    // - `mode/drag_node.js` `datum()`
-	    function datum() {
-	        var mode = context.mode();
-	        var isNote = mode && (mode.id.indexOf('note') !== -1);
-	        if (event.altKey || isNote) { return {}; }
+	    if (hash.rtl === 'true') {
+	      _textDirection = 'rtl';
+	    } else if (hash.rtl === 'false') {
+	      _textDirection = 'ltr';
+	    } else {
+	      _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
+	    }
 
-	        var element;
-	        if (event.type === 'keydown') {
-	            element = _lastMouse && _lastMouse.target;
-	        } else {
-	            element = event.target;
-	        }
+	    var locale = _localeCode;
+	    if (locale.toLowerCase() === 'en-us') locale = 'en';
+	    _languageNames = _localeStrings.general[locale].languageNames;
+	    _scriptNames = _localeStrings.general[locale].scriptNames;
+	    _usesMetric = _localeCode.slice(-3).toLowerCase() !== '-us';
+	  }
+	  /* Locales */
+	  // Returns a Promise to load the strings for the requested locale
 
-	        // When drawing, snap only to touch targets..
-	        // (this excludes area fills and active drawing elements)
-	        var d = element.__data__;
-	        return (d && d.properties && d.properties.target) ? d : {};
-	    }
 
-	    function pointerdown() {
+	  localizer.loadLocale = function (locale, scopeId, directory) {
+	    // US English is the default
+	    if (locale.toLowerCase() === 'en-us') locale = 'en';
 
-	        if (_downPointer) { return; }
+	    if (_localeStrings[scopeId] && _localeStrings[scopeId][locale]) {
+	      // already loaded
+	      return Promise.resolve(locale);
+	    }
 
-	        var pointerLocGetter = utilFastMouse(this);
-	        _downPointer = {
-	            id: event.pointerId || 'mouse',
-	            pointerLocGetter: pointerLocGetter,
-	            downTime: +new Date(),
-	            downLoc: pointerLocGetter(event)
-	        };
+	    var fileMap = _mainFileFetcher.fileMap();
+	    var key = "locale_".concat(scopeId, "_").concat(locale);
 
-	        dispatch$1.call('down', this, datum());
+	    if (!fileMap[key]) {
+	      fileMap[key] = "".concat(directory, "/").concat(locale, ".min.json");
 	    }
 
-	    function pointerup() {
+	    return _mainFileFetcher.get(key).then(function (d) {
+	      if (!_localeStrings[scopeId]) _localeStrings[scopeId] = {};
+	      _localeStrings[scopeId][locale] = d[locale];
+	      return locale;
+	    });
+	  };
 
-	        if (!_downPointer || _downPointer.id !== (event.pointerId || 'mouse')) { return; }
+	  localizer.pluralRule = function (number) {
+	    return pluralRule(number, _localeCode);
+	  }; // Returns the plural rule for the given `number` with the given `localeCode`.
+	  // One of: `zero`, `one`, `two`, `few`, `many`, `other`
 
-	        var downPointer = _downPointer;
-	        _downPointer = null;
 
-	        _lastPointerUpEvent = event;
+	  function pluralRule(number, localeCode) {
+	    // modern browsers have this functionality built-in
+	    var rules = 'Intl' in window && Intl.PluralRules && new Intl.PluralRules(localeCode);
 
-	        if (downPointer.isCancelled) { return; }
+	    if (rules) {
+	      return rules.select(number);
+	    } // fallback to basic one/other, as in English
 
-	        var t2 = +new Date();
-	        var p2 = downPointer.pointerLocGetter(event);
-	        var dist = geoVecLength(downPointer.downLoc, p2);
 
-	        if (dist < _closeTolerance || (dist < _tolerance && (t2 - downPointer.downTime) < 500)) {
-	            // Prevent a quick second click
-	            select(window).on('click.draw-block', function() {
-	                event.stopPropagation();
-	            }, true);
+	    if (number === 1) return 'one';
+	    return 'other';
+	  }
+	  /**
+	  * Try to find that string in `locale` or the current `_localeCode` matching
+	  * the given `stringId`. If no string can be found in the requested locale,
+	  * we'll recurse down all the `_localeCodes` until one is found.
+	  *
+	  * @param  {string}   stringId      string identifier
+	  * @param  {object?}  replacements  token replacements and default string
+	  * @param  {string?}  locale        locale to use (defaults to currentLocale)
+	  * @return {string?}  localized string
+	  */
 
-	            context.map().dblclickZoomEnable(false);
 
-	            window.setTimeout(function() {
-	                context.map().dblclickZoomEnable(true);
-	                select(window).on('click.draw-block', null);
-	            }, 500);
+	  localizer.tInfo = function (origStringId, replacements, locale) {
+	    var stringId = origStringId.trim();
+	    var scopeId = 'general';
 
-	            click(p2);
-	        }
+	    if (stringId[0] === '_') {
+	      var split = stringId.split('.');
+	      scopeId = split[0].slice(1);
+	      stringId = split.slice(1).join('.');
 	    }
 
-	    function pointermove() {
-	        if (_downPointer &&
-	            _downPointer.id === (event.pointerId || 'mouse') &&
-	            !_downPointer.isCancelled) {
-	            var p2 = _downPointer.pointerLocGetter(event);
-	            var dist = geoVecLength(_downPointer.downLoc, p2);
-	            if (dist >= _closeTolerance) {
-	                _downPointer.isCancelled = true;
-	                dispatch$1.call('downcancel', this);
-	            }
-	        }
-
-	        if ((event.pointerType && event.pointerType !== 'mouse') ||
-	            event.buttons ||
-	            _downPointer) { return; }
+	    locale = locale || _localeCode;
+	    var path = stringId.split('.').map(function (s) {
+	      return s.replace(/<TX_DOT>/g, '.');
+	    }).reverse();
+	    var stringsKey = locale; // US English is the default
 
-	        // HACK: Mobile Safari likes to send one or more `mouse` type pointermove
-	        // events immediately after non-mouse pointerup events; detect and ignore them.
-	        if (_lastPointerUpEvent &&
-	            _lastPointerUpEvent.pointerType !== 'mouse' &&
-	            event.timeStamp - _lastPointerUpEvent.timeStamp < 100) { return; }
+	    if (stringsKey.toLowerCase() === 'en-us') stringsKey = 'en';
+	    var result = _localeStrings && _localeStrings[scopeId] && _localeStrings[scopeId][stringsKey];
 
-	        _lastMouse = event;
-	        dispatch$1.call('move', this, datum());
+	    while (result !== undefined && path.length) {
+	      result = result[path.pop()];
 	    }
 
-	    function pointercancel() {
-	        if (_downPointer &&
-	            _downPointer.id === (event.pointerId || 'mouse')) {
+	    if (result !== undefined) {
+	      if (replacements) {
+	        if (_typeof(result) === 'object' && Object.keys(result).length) {
+	          // If plural forms are provided, dig one level deeper based on the
+	          // first numeric token replacement provided.
+	          var number = Object.values(replacements).find(function (value) {
+	            return typeof value === 'number';
+	          });
+
+	          if (number !== undefined) {
+	            var rule = pluralRule(number, locale);
 
-	            if (!_downPointer.isCancelled) {
-	                dispatch$1.call('downcancel', this);
+	            if (result[rule]) {
+	              result = result[rule];
+	            } else {
+	              // We're pretty sure this should be a plural but no string
+	              // could be found for the given rule. Just pick the first
+	              // string and hope it makes sense.
+	              result = Object.values(result)[0];
 	            }
-	            _downPointer = null;
+	          }
 	        }
-	    }
 
-	    function mouseenter() {
-	        _mouseLeave = false;
-	    }
+	        if (typeof result === 'string') {
+	          for (var key in replacements) {
+	            var value = replacements[key];
 
-	    function mouseleave() {
-	        _mouseLeave = true;
-	    }
+	            if (typeof value === 'number') {
+	              if (value.toLocaleString) {
+	                // format numbers for the locale
+	                value = value.toLocaleString(locale, {
+	                  style: 'decimal',
+	                  useGrouping: true,
+	                  minimumFractionDigits: 0
+	                });
+	              } else {
+	                value = value.toString();
+	              }
+	            }
 
-	    function allowsVertex(d) {
-	        return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
-	    }
+	            var token = "{".concat(key, "}");
+	            var regex = new RegExp(token, 'g');
+	            result = result.replace(regex, value);
+	          }
+	        }
+	      }
 
-	    // related code
-	    // - `mode/drag_node.js`     `doMove()`
-	    // - `behavior/draw.js`      `click()`
-	    // - `behavior/draw_way.js`  `move()`
-	    function click(loc) {
-	        var d = datum();
-	        var target = d && d.properties && d.properties.entity;
+	      if (typeof result === 'string') {
+	        // found a localized string!
+	        return {
+	          text: result,
+	          locale: locale
+	        };
+	      }
+	    } // no localized string found...
+	    // attempt to fallback to a lower-priority language
 
-	        var mode = context.mode();
 
-	        if (target && target.type === 'node' && allowsVertex(target)) {   // Snap to a node
-	            dispatch$1.call('clickNode', this, target, d);
-	            return;
+	    var index = _localeCodes.indexOf(locale);
 
-	        } else if (target && target.type === 'way' && (mode.id !== 'add-point' || mode.preset.matchGeometry('vertex'))) {   // Snap to a way
-	            var choice = geoChooseEdge(
-	                context.graph().childNodes(target), loc, context.projection, context.activeID()
-	            );
-	            if (choice) {
-	                var edge = [target.nodes[choice.index - 1], target.nodes[choice.index]];
-	                dispatch$1.call('clickWay', this, choice.loc, edge, d);
-	                return;
-	            }
-	        } else if (mode.id !== 'add-point' || mode.preset.matchGeometry('point')) {
-	            var locLatLng = context.projection.invert(loc);
-	            dispatch$1.call('click', this, locLatLng, d);
-	        }
+	    if (index >= 0 && index < _localeCodes.length - 1) {
+	      // eventually this will be 'en' or another locale with 100% coverage
+	      var fallback = _localeCodes[index + 1];
+	      return localizer.tInfo(origStringId, replacements, fallback);
+	    }
 
+	    if (replacements && 'default' in replacements) {
+	      // Fallback to a default value if one is specified in `replacements`
+	      return {
+	        text: replacements["default"],
+	        locale: null
+	      };
 	    }
 
-	    // treat a spacebar press like a click
-	    function space() {
-	        event.preventDefault();
-	        event.stopPropagation();
+	    var missing = "Missing ".concat(locale, " translation: ").concat(origStringId);
+	    if (typeof console !== 'undefined') console.error(missing); // eslint-disable-line
 
-	        var currSpace = context.map().mouse();
-	        if (_disableSpace && _lastSpace) {
-	            var dist = geoVecLength(_lastSpace, currSpace);
-	            if (dist > _tolerance) {
-	                _disableSpace = false;
-	            }
-	        }
+	    return {
+	      text: missing,
+	      locale: 'en'
+	    };
+	  };
 
-	        if (_disableSpace || _mouseLeave || !_lastMouse) { return; }
+	  localizer.hasTextForStringId = function (stringId) {
+	    return !!localizer.tInfo(stringId, {
+	      "default": 'nothing found'
+	    }).locale;
+	  }; // Returns only the localized text, discarding the locale info
 
-	        // user must move mouse or release space bar to allow another click
-	        _lastSpace = currSpace;
-	        _disableSpace = true;
 
-	        select(window).on('keyup.space-block', function() {
-	            event.preventDefault();
-	            event.stopPropagation();
-	            _disableSpace = false;
-	            select(window).on('keyup.space-block', null);
-	        });
+	  localizer.t = function (stringId, replacements, locale) {
+	    return localizer.tInfo(stringId, replacements, locale).text;
+	  }; // Returns the localized text wrapped in an HTML element encoding the locale info
 
-	        // get the current mouse position
-	        var loc = context.map().mouse() ||
-	            // or the map center if the mouse has never entered the map
-	            context.projection(context.map().center());
-	        click(loc);
-	    }
+	  /**
+	   * @deprecated This method is considered deprecated. Instead, use the direct DOM manipulating
+	   *             method `t.append`.
+	   */
 
 
-	    function backspace() {
-	        event.preventDefault();
-	        dispatch$1.call('undo');
-	    }
+	  localizer.t.html = function (stringId, replacements, locale) {
+	    // replacement string might be html unsafe, so we need to escape it except if it is explicitly marked as html code
+	    replacements = Object.assign({}, replacements);
 
+	    for (var k in replacements) {
+	      if (typeof replacements[k] === 'string') {
+	        replacements[k] = escape$4(replacements[k]);
+	      }
 
-	    function del() {
-	        event.preventDefault();
-	        dispatch$1.call('cancel');
+	      if (_typeof(replacements[k]) === 'object' && typeof replacements[k].html === 'string') {
+	        replacements[k] = replacements[k].html;
+	      }
 	    }
 
+	    var info = localizer.tInfo(stringId, replacements, locale); // text may be empty or undefined if `replacements.default` is
 
-	    function ret() {
-	        event.preventDefault();
-	        dispatch$1.call('finish');
+	    if (info.text) {
+	      return "<span class=\"localized-text\" lang=\"".concat(info.locale || 'und', "\">").concat(info.text, "</span>");
+	    } else {
+	      return '';
 	    }
+	  }; // Adds localized text wrapped as an HTML span element with locale info to the DOM
 
 
-	    function behavior(selection) {
-	        context.install(_hover);
-	        context.install(_edit);
+	  localizer.t.append = function (stringId, replacements, locale) {
+	    return function (selection) {
+	      var info = localizer.tInfo(stringId, replacements, locale);
+	      return selection.append('span').attr('class', 'localized-text').attr('lang', info.locale || 'und').text((replacements && replacements.prefix || '') + info.text + (replacements && replacements.suffix || ''));
+	    };
+	  };
 
-	        _downPointer = null;
+	  localizer.languageName = function (code, options) {
+	    if (_languageNames[code]) {
+	      // name in locale language
+	      // e.g. "German"
+	      return _languageNames[code];
+	    } // sometimes we only want the local name
 
-	        keybinding
-	            .on('⌫', backspace)
-	            .on('⌦', del)
-	            .on('⎋', ret)
-	            .on('↩', ret)
-	            .on('space', space)
-	            .on('⌥space', space);
 
-	        selection
-	            .on('mouseenter.draw', mouseenter)
-	            .on('mouseleave.draw', mouseleave)
-	            .on(_pointerPrefix + 'down.draw', pointerdown)
-	            .on(_pointerPrefix + 'move.draw', pointermove);
+	    if (options && options.localOnly) return null;
+	    var langInfo = _dataLanguages[code];
 
-	        select(window)
-	            .on(_pointerPrefix + 'up.draw', pointerup, true)
-	            .on('pointercancel.draw', pointercancel, true);
+	    if (langInfo) {
+	      if (langInfo.nativeName) {
+	        // name in native language
+	        // e.g. "Deutsch (de)"
+	        return localizer.t('translate.language_and_code', {
+	          language: langInfo.nativeName,
+	          code: code
+	        });
+	      } else if (langInfo.base && langInfo.script) {
+	        var base = langInfo.base; // the code of the language this is based on
 
-	        select(document)
-	            .call(keybinding);
+	        if (_languageNames[base]) {
+	          // base language name in locale language
+	          var scriptCode = langInfo.script;
+	          var script = _scriptNames[scriptCode] || scriptCode; // e.g. "Serbian (Cyrillic)"
 
-	        return behavior;
+	          return localizer.t('translate.language_and_code', {
+	            language: _languageNames[base],
+	            code: script
+	          });
+	        } else if (_dataLanguages[base] && _dataLanguages[base].nativeName) {
+	          // e.g. "српски (sr-Cyrl)"
+	          return localizer.t('translate.language_and_code', {
+	            language: _dataLanguages[base].nativeName,
+	            code: code
+	          });
+	        }
+	      }
 	    }
 
+	    return code; // if not found, use the code
+	  };
 
-	    behavior.off = function(selection) {
-	        context.ui().sidebar.hover.cancel();
-	        context.uninstall(_hover);
-	        context.uninstall(_edit);
+	  return localizer;
+	}
 
-	        selection
-	            .on('mouseenter.draw', null)
-	            .on('mouseleave.draw', null)
-	            .on(_pointerPrefix + 'down.draw', null)
-	            .on(_pointerPrefix + 'move.draw', null);
+	// `presetCollection` is a wrapper around an `Array` of presets `collection`,
+	// and decorated with some extra methods for searching and matching geometry
+	//
 
-	        select(window)
-	            .on(_pointerPrefix + 'up.draw', null)
-	            .on('pointercancel.draw', null);
-	            // note: keyup.space-block, click.draw-block should remain
+	function presetCollection(collection) {
+	  var MAXRESULTS = 50;
+	  var _this = {};
+	  var _memo = {};
+	  _this.collection = collection;
 
-	        select(document)
-	            .call(keybinding.unbind);
-	    };
+	  _this.item = function (id) {
+	    if (_memo[id]) return _memo[id];
 
+	    var found = _this.collection.find(function (d) {
+	      return d.id === id;
+	    });
 
-	    behavior.hover = function() {
-	        return _hover;
-	    };
+	    if (found) _memo[id] = found;
+	    return found;
+	  };
 
+	  _this.index = function (id) {
+	    return _this.collection.findIndex(function (d) {
+	      return d.id === id;
+	    });
+	  };
 
-	    return utilRebind(behavior, dispatch$1, 'on');
-	}
+	  _this.matchGeometry = function (geometry) {
+	    return presetCollection(_this.collection.filter(function (d) {
+	      return d.matchGeometry(geometry);
+	    }));
+	  };
 
-	function initRange(domain, range) {
-	  switch (arguments.length) {
-	    case 0: break;
-	    case 1: this.range(domain); break;
-	    default: this.range(range).domain(domain); break;
-	  }
-	  return this;
-	}
+	  _this.matchAllGeometry = function (geometries) {
+	    return presetCollection(_this.collection.filter(function (d) {
+	      return d && d.matchAllGeometry(geometries);
+	    }));
+	  };
 
-	var prefix = "$";
+	  _this.matchAnyGeometry = function (geometries) {
+	    return presetCollection(_this.collection.filter(function (d) {
+	      return geometries.some(function (geom) {
+	        return d.matchGeometry(geom);
+	      });
+	    }));
+	  };
 
-	function Map$1() {}
+	  _this.fallback = function (geometry) {
+	    var id = geometry;
+	    if (id === 'vertex') id = 'point';
+	    return _this.item(id);
+	  };
 
-	Map$1.prototype = map$2.prototype = {
-	  constructor: Map$1,
-	  has: function(key) {
-	    return (prefix + key) in this;
-	  },
-	  get: function(key) {
-	    return this[prefix + key];
-	  },
-	  set: function(key, value) {
-	    this[prefix + key] = value;
-	    return this;
-	  },
-	  remove: function(key) {
-	    var property = prefix + key;
-	    return property in this && delete this[property];
-	  },
-	  clear: function() {
-	    for (var property in this) { if (property[0] === prefix) { delete this[property]; } }
-	  },
-	  keys: function() {
-	    var keys = [];
-	    for (var property in this) { if (property[0] === prefix) { keys.push(property.slice(1)); } }
-	    return keys;
-	  },
-	  values: function() {
-	    var values = [];
-	    for (var property in this) { if (property[0] === prefix) { values.push(this[property]); } }
-	    return values;
-	  },
-	  entries: function() {
-	    var entries = [];
-	    for (var property in this) { if (property[0] === prefix) { entries.push({key: property.slice(1), value: this[property]}); } }
-	    return entries;
-	  },
-	  size: function() {
-	    var size = 0;
-	    for (var property in this) { if (property[0] === prefix) { ++size; } }
-	    return size;
-	  },
-	  empty: function() {
-	    for (var property in this) { if (property[0] === prefix) { return false; } }
-	    return true;
-	  },
-	  each: function(f) {
-	    for (var property in this) { if (property[0] === prefix) { f(this[property], property.slice(1), this); } }
-	  }
-	};
+	  _this.search = function (value, geometry, loc) {
+	    if (!value) return _this; // don't remove diacritical characters since we're assuming the user is being intentional
 
-	function map$2(object, f) {
-	  var map = new Map$1;
+	    value = value.toLowerCase().trim(); // match at name beginning or just after a space (e.g. "office" -> match "Law Office")
 
-	  // Copy constructor.
-	  if (object instanceof Map$1) { object.each(function(value, key) { map.set(key, value); }); }
+	    function leading(a) {
+	      var index = a.indexOf(value);
+	      return index === 0 || a[index - 1] === ' ';
+	    } // match at name beginning only
 
-	  // Index array by numeric index or specified key function.
-	  else if (Array.isArray(object)) {
-	    var i = -1,
-	        n = object.length,
-	        o;
 
-	    if (f == null) { while (++i < n) { map.set(i, object[i]); } }
-	    else { while (++i < n) { map.set(f(o = object[i], i, object), o); } }
-	  }
+	    function leadingStrict(a) {
+	      var index = a.indexOf(value);
+	      return index === 0;
+	    }
 
-	  // Convert object to map.
-	  else if (object) { for (var key in object) { map.set(key, object[key]); } }
+	    function sortPresets(nameProp) {
+	      return function sortNames(a, b) {
+	        var aCompare = a[nameProp]();
+	        var bCompare = b[nameProp](); // priority if search string matches preset name exactly - #4325
 
-	  return map;
-	}
+	        if (value === aCompare) return -1;
+	        if (value === bCompare) return 1; // priority for higher matchScore
 
-	function Set$1() {}
+	        var i = b.originalScore - a.originalScore;
+	        if (i !== 0) return i; // priority if search string appears earlier in preset name
 
-	var proto = map$2.prototype;
+	        i = aCompare.indexOf(value) - bCompare.indexOf(value);
+	        if (i !== 0) return i; // priority for shorter preset names
 
-	Set$1.prototype = set$2.prototype = {
-	  constructor: Set$1,
-	  has: proto.has,
-	  add: function(value) {
-	    value += "";
-	    this[prefix + value] = value;
-	    return this;
-	  },
-	  remove: proto.remove,
-	  clear: proto.clear,
-	  values: proto.keys,
-	  size: proto.size,
-	  empty: proto.empty,
-	  each: proto.each
-	};
+	        return aCompare.length - bCompare.length;
+	      };
+	    }
 
-	function set$2(object, f) {
-	  var set = new Set$1;
+	    var pool = _this.collection;
 
-	  // Copy constructor.
-	  if (object instanceof Set$1) { object.each(function(value) { set.add(value); }); }
+	    if (Array.isArray(loc)) {
+	      var validLocations = _mainLocations.locationsAt(loc);
+	      pool = pool.filter(function (a) {
+	        return !a.locationSetID || validLocations[a.locationSetID];
+	      });
+	    }
 
-	  // Otherwise, assume it’s an array.
-	  else if (object) {
-	    var i = -1, n = object.length;
-	    if (f == null) { while (++i < n) { set.add(object[i]); } }
-	    else { while (++i < n) { set.add(f(object[i], i, object)); } }
-	  }
+	    var searchable = pool.filter(function (a) {
+	      return a.searchable !== false && a.suggestion !== true;
+	    });
+	    var suggestions = pool.filter(function (a) {
+	      return a.suggestion === true;
+	    }); // matches value to preset.name
+
+	    var leadingNames = searchable.filter(function (a) {
+	      return leading(a.searchName());
+	    }).sort(sortPresets('searchName')); // matches value to preset suggestion name
+
+	    var leadingSuggestions = suggestions.filter(function (a) {
+	      return leadingStrict(a.searchName());
+	    }).sort(sortPresets('searchName'));
+	    var leadingNamesStripped = searchable.filter(function (a) {
+	      return leading(a.searchNameStripped());
+	    }).sort(sortPresets('searchNameStripped'));
+	    var leadingSuggestionsStripped = suggestions.filter(function (a) {
+	      return leadingStrict(a.searchNameStripped());
+	    }).sort(sortPresets('searchNameStripped')); // matches value to preset.terms values
+
+	    var leadingTerms = searchable.filter(function (a) {
+	      return (a.terms() || []).some(leading);
+	    });
+	    var leadingSuggestionTerms = suggestions.filter(function (a) {
+	      return (a.terms() || []).some(leading);
+	    }); // matches value to preset.tags values
 
-	  return set;
-	}
+	    var leadingTagValues = searchable.filter(function (a) {
+	      return Object.values(a.tags || {}).filter(function (val) {
+	        return val !== '*';
+	      }).some(leading);
+	    }); // finds close matches to value in preset.name
 
-	var array$1 = Array.prototype;
+	    var similarName = searchable.map(function (a) {
+	      return {
+	        preset: a,
+	        dist: utilEditDistance(value, a.searchName())
+	      };
+	    }).filter(function (a) {
+	      return a.dist + Math.min(value.length - a.preset.searchName().length, 0) < 3;
+	    }).sort(function (a, b) {
+	      return a.dist - b.dist;
+	    }).map(function (a) {
+	      return a.preset;
+	    }); // finds close matches to value to preset suggestion name
+
+	    var similarSuggestions = suggestions.map(function (a) {
+	      return {
+	        preset: a,
+	        dist: utilEditDistance(value, a.searchName())
+	      };
+	    }).filter(function (a) {
+	      return a.dist + Math.min(value.length - a.preset.searchName().length, 0) < 1;
+	    }).sort(function (a, b) {
+	      return a.dist - b.dist;
+	    }).map(function (a) {
+	      return a.preset;
+	    }); // finds close matches to value in preset.terms
+
+	    var similarTerms = searchable.filter(function (a) {
+	      return (a.terms() || []).some(function (b) {
+	        return utilEditDistance(value, b) + Math.min(value.length - b.length, 0) < 3;
+	      });
+	    });
+	    var results = leadingNames.concat(leadingSuggestions, leadingNamesStripped, leadingSuggestionsStripped, leadingTerms, leadingSuggestionTerms, leadingTagValues, similarName, similarSuggestions, similarTerms).slice(0, MAXRESULTS - 1);
 
-	var map$3 = array$1.map;
-	var slice$4 = array$1.slice;
+	    if (geometry) {
+	      if (typeof geometry === 'string') {
+	        results.push(_this.fallback(geometry));
+	      } else {
+	        geometry.forEach(function (geom) {
+	          return results.push(_this.fallback(geom));
+	        });
+	      }
+	    }
 
-	function constant$4(x) {
-	  return function() {
-	    return x;
+	    return presetCollection(utilArrayUniq(results));
 	  };
-	}
-
-	function number$1(x) {
-	  return +x;
-	}
-
-	var unit = [0, 1];
 
-	function identity$3(x) {
-	  return x;
-	}
-
-	function normalize(a, b) {
-	  return (b -= (a = +a))
-	      ? function(x) { return (x - a) / b; }
-	      : constant$4(isNaN(b) ? NaN : 0.5);
-	}
-
-	function clamper(domain) {
-	  var a = domain[0], b = domain[domain.length - 1], t;
-	  if (a > b) { t = a, a = b, b = t; }
-	  return function(x) { return Math.max(a, Math.min(b, x)); };
+	  return _this;
 	}
 
-	// normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
-	// interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].
-	function bimap(domain, range, interpolate) {
-	  var d0 = domain[0], d1 = domain[1], r0 = range[0], r1 = range[1];
-	  if (d1 < d0) { d0 = normalize(d1, d0), r0 = interpolate(r1, r0); }
-	  else { d0 = normalize(d0, d1), r0 = interpolate(r0, r1); }
-	  return function(x) { return r0(d0(x)); };
-	}
+	// `presetCategory` builds a `presetCollection` of member presets,
+	// decorated with some extra methods for searching and matching geometry
+	//
 
-	function polymap(domain, range, interpolate) {
-	  var j = Math.min(domain.length, range.length) - 1,
-	      d = new Array(j),
-	      r = new Array(j),
-	      i = -1;
+	function presetCategory(categoryID, category, allPresets) {
+	  var _this = Object.assign({}, category); // shallow copy
 
-	  // Reverse descending domains.
-	  if (domain[j] < domain[0]) {
-	    domain = domain.slice().reverse();
-	    range = range.slice().reverse();
-	  }
 
-	  while (++i < j) {
-	    d[i] = normalize(domain[i], domain[i + 1]);
-	    r[i] = interpolate(range[i], range[i + 1]);
-	  }
+	  var _searchName; // cache
 
-	  return function(x) {
-	    var i = bisectRight(domain, x, 1, j) - 1;
-	    return r[i](d[i](x));
-	  };
-	}
 
-	function copy$1(source, target) {
-	  return target
-	      .domain(source.domain())
-	      .range(source.range())
-	      .interpolate(source.interpolate())
-	      .clamp(source.clamp())
-	      .unknown(source.unknown());
-	}
+	  var _searchNameStripped; // cache
 
-	function transformer$1() {
-	  var domain = unit,
-	      range = unit,
-	      interpolate$1 = interpolate,
-	      transform,
-	      untransform,
-	      unknown,
-	      clamp = identity$3,
-	      piecewise,
-	      output,
-	      input;
 
-	  function rescale() {
-	    piecewise = Math.min(domain.length, range.length) > 2 ? polymap : bimap;
-	    output = input = null;
-	    return scale;
-	  }
+	  _this.id = categoryID;
+	  _this.members = presetCollection((category.members || []).map(function (presetID) {
+	    return allPresets[presetID];
+	  }).filter(Boolean));
+	  _this.geometry = _this.members.collection.reduce(function (acc, preset) {
+	    for (var i in preset.geometry) {
+	      var geometry = preset.geometry[i];
+
+	      if (acc.indexOf(geometry) === -1) {
+	        acc.push(geometry);
+	      }
+	    }
 
-	  function scale(x) {
-	    return isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate$1)))(transform(clamp(x)));
-	  }
+	    return acc;
+	  }, []);
 
-	  scale.invert = function(y) {
-	    return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3_interpolateNumber)))(y)));
+	  _this.matchGeometry = function (geom) {
+	    return _this.geometry.indexOf(geom) >= 0;
 	  };
 
-	  scale.domain = function(_) {
-	    return arguments.length ? (domain = map$3.call(_, number$1), clamp === identity$3 || (clamp = clamper(domain)), rescale()) : domain.slice();
+	  _this.matchAllGeometry = function (geometries) {
+	    return _this.members.collection.some(function (preset) {
+	      return preset.matchAllGeometry(geometries);
+	    });
 	  };
 
-	  scale.range = function(_) {
-	    return arguments.length ? (range = slice$4.call(_), rescale()) : range.slice();
+	  _this.matchScore = function () {
+	    return -1;
 	  };
 
-	  scale.rangeRound = function(_) {
-	    return range = slice$4.call(_), interpolate$1 = interpolateRound, rescale();
+	  _this.name = function () {
+	    return _t("_tagging.presets.categories.".concat(categoryID, ".name"), {
+	      'default': categoryID
+	    });
 	  };
 
-	  scale.clamp = function(_) {
-	    return arguments.length ? (clamp = _ ? clamper(domain) : identity$3, scale) : clamp !== identity$3;
+	  _this.nameLabel = function () {
+	    return _t.html("_tagging.presets.categories.".concat(categoryID, ".name"), {
+	      'default': categoryID
+	    });
 	  };
 
-	  scale.interpolate = function(_) {
-	    return arguments.length ? (interpolate$1 = _, rescale()) : interpolate$1;
+	  _this.terms = function () {
+	    return [];
 	  };
 
-	  scale.unknown = function(_) {
-	    return arguments.length ? (unknown = _, scale) : unknown;
-	  };
+	  _this.searchName = function () {
+	    if (!_searchName) {
+	      _searchName = (_this.suggestion ? _this.originalName : _this.name()).toLowerCase();
+	    }
 
-	  return function(t, u) {
-	    transform = t, untransform = u;
-	    return rescale();
+	    return _searchName;
 	  };
-	}
-
-	function continuous(transform, untransform) {
-	  return transformer$1()(transform, untransform);
-	}
-
-	// Computes the decimal coefficient and exponent of the specified number x with
-	// significant digits p, where x is positive and p is in [1, 21] or undefined.
-	// For example, formatDecimal(1.23) returns ["123", 0].
-	function formatDecimal(x, p) {
-	  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) { return null; } // NaN, ±Infinity
-	  var i, coefficient = x.slice(0, i);
 
-	  // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
-	  // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
-	  return [
-	    coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,
-	    +x.slice(i + 1)
-	  ];
-	}
+	  _this.searchNameStripped = function () {
+	    if (!_searchNameStripped) {
+	      _searchNameStripped = _this.searchName(); // split combined diacritical characters into their parts
 
-	function exponent(x) {
-	  return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;
-	}
-
-	function formatGroup(grouping, thousands) {
-	  return function(value, width) {
-	    var i = value.length,
-	        t = [],
-	        j = 0,
-	        g = grouping[0],
-	        length = 0;
+	      if (_searchNameStripped.normalize) _searchNameStripped = _searchNameStripped.normalize('NFD'); // remove diacritics
 
-	    while (i > 0 && g > 0) {
-	      if (length + g + 1 > width) { g = Math.max(1, width - length); }
-	      t.push(value.substring(i -= g, i + g));
-	      if ((length += g + 1) > width) { break; }
-	      g = grouping[j = (j + 1) % grouping.length];
+	      _searchNameStripped = _searchNameStripped.replace(/[\u0300-\u036f]/g, '');
 	    }
 
-	    return t.reverse().join(thousands);
+	    return _searchNameStripped;
 	  };
-	}
 
-	function formatNumerals(numerals) {
-	  return function(value) {
-	    return value.replace(/[0-9]/g, function(i) {
-	      return numerals[+i];
-	    });
-	  };
+	  return _this;
 	}
 
-	// [[fill]align][sign][symbol][0][width][,][.precision][~][type]
-	var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
-
-	function formatSpecifier(specifier) {
-	  if (!(match = re.exec(specifier))) { throw new Error("invalid format: " + specifier); }
-	  var match;
-	  return new FormatSpecifier({
-	    fill: match[1],
-	    align: match[2],
-	    sign: match[3],
-	    symbol: match[4],
-	    zero: match[5],
-	    width: match[6],
-	    comma: match[7],
-	    precision: match[8] && match[8].slice(1),
-	    trim: match[9],
-	    type: match[10]
-	  });
-	}
+	// `presetField` decorates a given `field` Object
+	// with some extra methods for searching and matching geometry
+	//
 
-	formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
+	function presetField(fieldID, field) {
+	  var _this = Object.assign({}, field); // shallow copy
 
-	function FormatSpecifier(specifier) {
-	  this.fill = specifier.fill === undefined ? " " : specifier.fill + "";
-	  this.align = specifier.align === undefined ? ">" : specifier.align + "";
-	  this.sign = specifier.sign === undefined ? "-" : specifier.sign + "";
-	  this.symbol = specifier.symbol === undefined ? "" : specifier.symbol + "";
-	  this.zero = !!specifier.zero;
-	  this.width = specifier.width === undefined ? undefined : +specifier.width;
-	  this.comma = !!specifier.comma;
-	  this.precision = specifier.precision === undefined ? undefined : +specifier.precision;
-	  this.trim = !!specifier.trim;
-	  this.type = specifier.type === undefined ? "" : specifier.type + "";
-	}
 
-	FormatSpecifier.prototype.toString = function() {
-	  return this.fill
-	      + this.align
-	      + this.sign
-	      + this.symbol
-	      + (this.zero ? "0" : "")
-	      + (this.width === undefined ? "" : Math.max(1, this.width | 0))
-	      + (this.comma ? "," : "")
-	      + (this.precision === undefined ? "" : "." + Math.max(0, this.precision | 0))
-	      + (this.trim ? "~" : "")
-	      + this.type;
-	};
+	  _this.id = fieldID; // for use in classes, element ids, css selectors
 
-	// Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.
-	function formatTrim(s) {
-	  out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {
-	    switch (s[i]) {
-	      case ".": i0 = i1 = i; break;
-	      case "0": if (i0 === 0) { i0 = i; } i1 = i; break;
-	      default: if (!+s[i]) { break out; } if (i0 > 0) { i0 = 0; } break;
-	    }
-	  }
-	  return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
-	}
+	  _this.safeid = utilSafeClassName(fieldID);
 
-	var prefixExponent;
+	  _this.matchGeometry = function (geom) {
+	    return !_this.geometry || _this.geometry.indexOf(geom) !== -1;
+	  };
 
-	function formatPrefixAuto(x, p) {
-	  var d = formatDecimal(x, p);
-	  if (!d) { return x + ""; }
-	  var coefficient = d[0],
-	      exponent = d[1],
-	      i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
-	      n = coefficient.length;
-	  return i === n ? coefficient
-	      : i > n ? coefficient + new Array(i - n + 1).join("0")
-	      : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i)
-	      : "0." + new Array(1 - i).join("0") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!
-	}
+	  _this.matchAllGeometry = function (geometries) {
+	    return !_this.geometry || geometries.every(function (geom) {
+	      return _this.geometry.indexOf(geom) !== -1;
+	    });
+	  };
 
-	function formatRounded(x, p) {
-	  var d = formatDecimal(x, p);
-	  if (!d) { return x + ""; }
-	  var coefficient = d[0],
-	      exponent = d[1];
-	  return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient
-	      : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1)
-	      : coefficient + new Array(exponent - coefficient.length + 2).join("0");
-	}
+	  _this.t = function (scope, options) {
+	    return _t("_tagging.presets.fields.".concat(fieldID, ".").concat(scope), options);
+	  };
 
-	var formatTypes = {
-	  "%": function(x, p) { return (x * 100).toFixed(p); },
-	  "b": function(x) { return Math.round(x).toString(2); },
-	  "c": function(x) { return x + ""; },
-	  "d": function(x) { return Math.round(x).toString(10); },
-	  "e": function(x, p) { return x.toExponential(p); },
-	  "f": function(x, p) { return x.toFixed(p); },
-	  "g": function(x, p) { return x.toPrecision(p); },
-	  "o": function(x) { return Math.round(x).toString(8); },
-	  "p": function(x, p) { return formatRounded(x * 100, p); },
-	  "r": formatRounded,
-	  "s": formatPrefixAuto,
-	  "X": function(x) { return Math.round(x).toString(16).toUpperCase(); },
-	  "x": function(x) { return Math.round(x).toString(16); }
-	};
+	  _this.t.html = function (scope, options) {
+	    return _t.html("_tagging.presets.fields.".concat(fieldID, ".").concat(scope), options);
+	  };
 
-	function identity$4(x) {
-	  return x;
-	}
+	  _this.hasTextForStringId = function (scope) {
+	    return _mainLocalizer.hasTextForStringId("_tagging.presets.fields.".concat(fieldID, ".").concat(scope));
+	  };
 
-	var map$4 = Array.prototype.map,
-	    prefixes = ["y","z","a","f","p","n","µ","m","","k","M","G","T","P","E","Z","Y"];
+	  _this.title = function () {
+	    return _this.overrideLabel || _this.t('label', {
+	      'default': fieldID
+	    });
+	  };
 
-	function formatLocale(locale) {
-	  var group = locale.grouping === undefined || locale.thousands === undefined ? identity$4 : formatGroup(map$4.call(locale.grouping, Number), locale.thousands + ""),
-	      currencyPrefix = locale.currency === undefined ? "" : locale.currency[0] + "",
-	      currencySuffix = locale.currency === undefined ? "" : locale.currency[1] + "",
-	      decimal = locale.decimal === undefined ? "." : locale.decimal + "",
-	      numerals = locale.numerals === undefined ? identity$4 : formatNumerals(map$4.call(locale.numerals, String)),
-	      percent = locale.percent === undefined ? "%" : locale.percent + "",
-	      minus = locale.minus === undefined ? "-" : locale.minus + "",
-	      nan = locale.nan === undefined ? "NaN" : locale.nan + "";
+	  _this.label = function () {
+	    return _this.overrideLabel || _this.t.html('label', {
+	      'default': fieldID
+	    });
+	  };
 
-	  function newFormat(specifier) {
-	    specifier = formatSpecifier(specifier);
+	  var _placeholder = _this.placeholder;
 
-	    var fill = specifier.fill,
-	        align = specifier.align,
-	        sign = specifier.sign,
-	        symbol = specifier.symbol,
-	        zero = specifier.zero,
-	        width = specifier.width,
-	        comma = specifier.comma,
-	        precision = specifier.precision,
-	        trim = specifier.trim,
-	        type = specifier.type;
+	  _this.placeholder = function () {
+	    return _this.t('placeholder', {
+	      'default': _placeholder
+	    });
+	  };
 
-	    // The "n" type is an alias for ",g".
-	    if (type === "n") { comma = true, type = "g"; }
+	  _this.originalTerms = (_this.terms || []).join();
 
-	    // The "" type, and any invalid type, is an alias for ".12~g".
-	    else if (!formatTypes[type]) { precision === undefined && (precision = 12), trim = true, type = "g"; }
+	  _this.terms = function () {
+	    return _this.t('terms', {
+	      'default': _this.originalTerms
+	    }).toLowerCase().trim().split(/\s*,+\s*/);
+	  };
 
-	    // If zero fill is specified, padding goes after sign and before digits.
-	    if (zero || (fill === "0" && align === "=")) { zero = true, fill = "0", align = "="; }
+	  _this.increment = _this.type === 'number' ? _this.increment || 1 : undefined;
+	  return _this;
+	}
 
-	    // Compute the prefix and suffix.
-	    // For SI-prefix, the suffix is lazily computed.
-	    var prefix = symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
-	        suffix = symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : "";
+	// `presetPreset` decorates a given `preset` Object
+	// with some extra methods for searching and matching geometry
+	//
 
-	    // What format function should we use?
-	    // Is this an integer type?
-	    // Can this type generate exponential notation?
-	    var formatType = formatTypes[type],
-	        maybeSuffix = /[defgprs%]/.test(type);
+	function presetPreset(presetID, preset, addable, allFields, allPresets) {
+	  allFields = allFields || {};
+	  allPresets = allPresets || {};
 
-	    // Set the default precision if not specified,
-	    // or clamp the specified precision to the supported range.
-	    // For significant precision, it must be in [1, 21].
-	    // For fixed precision, it must be in [0, 20].
-	    precision = precision === undefined ? 6
-	        : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))
-	        : Math.max(0, Math.min(20, precision));
+	  var _this = Object.assign({}, preset); // shallow copy
 
-	    function format(value) {
-	      var valuePrefix = prefix,
-	          valueSuffix = suffix,
-	          i, n, c;
 
-	      if (type === "c") {
-	        valueSuffix = formatType(value) + valueSuffix;
-	        value = "";
-	      } else {
-	        value = +value;
+	  var _addable = addable || false;
 
-	        // Determine the sign. -0 is not less than 0, but 1 / -0 is!
-	        var valueNegative = value < 0 || 1 / value < 0;
+	  var _resolvedFields; // cache
 
-	        // Perform the initial formatting.
-	        value = isNaN(value) ? nan : formatType(Math.abs(value), precision);
 
-	        // Trim insignificant zeros.
-	        if (trim) { value = formatTrim(value); }
+	  var _resolvedMoreFields; // cache
 
-	        // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
-	        if (valueNegative && +value === 0 && sign !== "+") { valueNegative = false; }
 
-	        // Compute the prefix and suffix.
-	        valuePrefix = (valueNegative ? (sign === "(" ? sign : minus) : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
-	        valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : "");
+	  var _searchName; // cache
 
-	        // Break the formatted value into the integer “value” part that can be
-	        // grouped, and fractional or exponential “suffix” part that is not.
-	        if (maybeSuffix) {
-	          i = -1, n = value.length;
-	          while (++i < n) {
-	            if (c = value.charCodeAt(i), 48 > c || c > 57) {
-	              valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
-	              value = value.slice(0, i);
-	              break;
-	            }
-	          }
-	        }
-	      }
 
-	      // If the fill character is not "0", grouping is applied before padding.
-	      if (comma && !zero) { value = group(value, Infinity); }
+	  var _searchNameStripped; // cache
 
-	      // Compute the padding.
-	      var length = valuePrefix.length + value.length + valueSuffix.length,
-	          padding = length < width ? new Array(width - length + 1).join(fill) : "";
 
-	      // If the fill character is "0", grouping is applied after padding.
-	      if (comma && zero) { value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; }
+	  _this.id = presetID;
+	  _this.safeid = utilSafeClassName(presetID); // for use in css classes, selectors, element ids
 
-	      // Reconstruct the final output based on the desired alignment.
-	      switch (align) {
-	        case "<": value = valuePrefix + value + valueSuffix + padding; break;
-	        case "=": value = valuePrefix + padding + value + valueSuffix; break;
-	        case "^": value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); break;
-	        default: value = padding + valuePrefix + value + valueSuffix; break;
-	      }
+	  _this.originalTerms = (_this.terms || []).join();
+	  _this.originalName = _this.name || '';
+	  _this.originalScore = _this.matchScore || 1;
+	  _this.originalReference = _this.reference || {};
+	  _this.originalFields = _this.fields || [];
+	  _this.originalMoreFields = _this.moreFields || [];
 
-	      return numerals(value);
-	    }
+	  _this.fields = function () {
+	    return _resolvedFields || (_resolvedFields = resolve('fields'));
+	  };
 
-	    format.toString = function() {
-	      return specifier + "";
-	    };
+	  _this.moreFields = function () {
+	    return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields'));
+	  };
 
-	    return format;
-	  }
+	  _this.resetFields = function () {
+	    return _resolvedFields = _resolvedMoreFields = null;
+	  };
 
-	  function formatPrefix(specifier, value) {
-	    var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
-	        e = Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3,
-	        k = Math.pow(10, -e),
-	        prefix = prefixes[8 + e / 3];
-	    return function(value) {
-	      return f(k * value) + prefix;
-	    };
-	  }
+	  _this.tags = _this.tags || {};
+	  _this.addTags = _this.addTags || _this.tags;
+	  _this.removeTags = _this.removeTags || _this.addTags;
+	  _this.geometry = _this.geometry || [];
 
-	  return {
-	    format: newFormat,
-	    formatPrefix: formatPrefix
+	  _this.matchGeometry = function (geom) {
+	    return _this.geometry.indexOf(geom) >= 0;
 	  };
-	}
 
-	var locale;
-	var format;
-	var formatPrefix;
+	  _this.matchAllGeometry = function (geoms) {
+	    return geoms.every(_this.matchGeometry);
+	  };
 
-	defaultLocale({
-	  decimal: ".",
-	  thousands: ",",
-	  grouping: [3],
-	  currency: ["$", ""],
-	  minus: "-"
-	});
+	  _this.matchScore = function (entityTags) {
+	    var tags = _this.tags;
+	    var seen = {};
+	    var score = 0; // match on tags
 
-	function defaultLocale(definition) {
-	  locale = formatLocale(definition);
-	  format = locale.format;
-	  formatPrefix = locale.formatPrefix;
-	  return locale;
-	}
+	    for (var k in tags) {
+	      seen[k] = true;
 
-	function precisionFixed(step) {
-	  return Math.max(0, -exponent(Math.abs(step)));
-	}
+	      if (entityTags[k] === tags[k]) {
+	        score += _this.originalScore;
+	      } else if (tags[k] === '*' && k in entityTags) {
+	        score += _this.originalScore / 2;
+	      } else {
+	        return -1;
+	      }
+	    } // boost score for additional matches in addTags - #6802
 
-	function precisionPrefix(step, value) {
-	  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
-	}
 
-	function precisionRound(step, max) {
-	  step = Math.abs(step), max = Math.abs(max) - step;
-	  return Math.max(0, exponent(max) - exponent(step)) + 1;
-	}
+	    var addTags = _this.addTags;
 
-	function tickFormat(start, stop, count, specifier) {
-	  var step = tickStep(start, stop, count),
-	      precision;
-	  specifier = formatSpecifier(specifier == null ? ",f" : specifier);
-	  switch (specifier.type) {
-	    case "s": {
-	      var value = Math.max(Math.abs(start), Math.abs(stop));
-	      if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) { specifier.precision = precision; }
-	      return formatPrefix(specifier, value);
-	    }
-	    case "":
-	    case "e":
-	    case "g":
-	    case "p":
-	    case "r": {
-	      if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) { specifier.precision = precision - (specifier.type === "e"); }
-	      break;
-	    }
-	    case "f":
-	    case "%": {
-	      if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) { specifier.precision = precision - (specifier.type === "%") * 2; }
-	      break;
+	    for (var _k in addTags) {
+	      if (!seen[_k] && entityTags[_k] === addTags[_k]) {
+	        score += _this.originalScore;
+	      }
 	    }
-	  }
-	  return format(specifier);
-	}
-
-	function linearish(scale) {
-	  var domain = scale.domain;
 
-	  scale.ticks = function(count) {
-	    var d = domain();
-	    return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
+	    return score;
 	  };
 
-	  scale.tickFormat = function(count, specifier) {
-	    var d = domain();
-	    return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
+	  _this.t = function (scope, options) {
+	    var textID = "_tagging.presets.presets.".concat(presetID, ".").concat(scope);
+	    return _t(textID, options);
 	  };
 
-	  scale.nice = function(count) {
-	    if (count == null) { count = 10; }
-
-	    var d = domain(),
-	        i0 = 0,
-	        i1 = d.length - 1,
-	        start = d[i0],
-	        stop = d[i1],
-	        step;
+	  _this.t.html = function (scope, options) {
+	    var textID = "_tagging.presets.presets.".concat(presetID, ".").concat(scope);
+	    return _t.html(textID, options);
+	  };
 
-	    if (stop < start) {
-	      step = start, start = stop, stop = step;
-	      step = i0, i0 = i1, i1 = step;
-	    }
+	  _this.name = function () {
+	    return _this.t('name', {
+	      'default': _this.originalName
+	    });
+	  };
 
-	    step = tickIncrement(start, stop, count);
+	  _this.nameLabel = function () {
+	    return _this.t.html('name', {
+	      'default': _this.originalName
+	    });
+	  };
 
-	    if (step > 0) {
-	      start = Math.floor(start / step) * step;
-	      stop = Math.ceil(stop / step) * step;
-	      step = tickIncrement(start, stop, count);
-	    } else if (step < 0) {
-	      start = Math.ceil(start * step) / step;
-	      stop = Math.floor(stop * step) / step;
-	      step = tickIncrement(start, stop, count);
-	    }
+	  _this.subtitle = function () {
+	    if (_this.suggestion) {
+	      var path = presetID.split('/');
+	      path.pop(); // remove brand name
 
-	    if (step > 0) {
-	      d[i0] = Math.floor(start / step) * step;
-	      d[i1] = Math.ceil(stop / step) * step;
-	      domain(d);
-	    } else if (step < 0) {
-	      d[i0] = Math.ceil(start * step) / step;
-	      d[i1] = Math.floor(stop * step) / step;
-	      domain(d);
+	      return _t('_tagging.presets.presets.' + path.join('/') + '.name');
 	    }
 
-	    return scale;
+	    return null;
 	  };
 
-	  return scale;
-	}
+	  _this.subtitleLabel = function () {
+	    if (_this.suggestion) {
+	      var path = presetID.split('/');
+	      path.pop(); // remove brand name
 
-	function linear$2() {
-	  var scale = continuous(identity$3, identity$3);
+	      return _t.html('_tagging.presets.presets.' + path.join('/') + '.name');
+	    }
 
-	  scale.copy = function() {
-	    return copy$1(scale, linear$2());
+	    return null;
 	  };
 
-	  initRange.apply(scale, arguments);
-
-	  return linearish(scale);
-	}
+	  _this.terms = function () {
+	    return _this.t('terms', {
+	      'default': _this.originalTerms
+	    }).toLowerCase().trim().split(/\s*,+\s*/);
+	  };
 
-	function quantize() {
-	  var x0 = 0,
-	      x1 = 1,
-	      n = 1,
-	      domain = [0.5],
-	      range = [0, 1],
-	      unknown;
+	  _this.searchName = function () {
+	    if (!_searchName) {
+	      _searchName = (_this.suggestion ? _this.originalName : _this.name()).toLowerCase();
+	    }
 
-	  function scale(x) {
-	    return x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
-	  }
+	    return _searchName;
+	  };
 
-	  function rescale() {
-	    var i = -1;
-	    domain = new Array(n);
-	    while (++i < n) { domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1); }
-	    return scale;
-	  }
+	  _this.searchNameStripped = function () {
+	    if (!_searchNameStripped) {
+	      _searchNameStripped = _this.searchName(); // split combined diacritical characters into their parts
 
-	  scale.domain = function(_) {
-	    return arguments.length ? (x0 = +_[0], x1 = +_[1], rescale()) : [x0, x1];
-	  };
+	      if (_searchNameStripped.normalize) _searchNameStripped = _searchNameStripped.normalize('NFD'); // remove diacritics
 
-	  scale.range = function(_) {
-	    return arguments.length ? (n = (range = slice$4.call(_)).length - 1, rescale()) : range.slice();
-	  };
+	      _searchNameStripped = _searchNameStripped.replace(/[\u0300-\u036f]/g, '');
+	    }
 
-	  scale.invertExtent = function(y) {
-	    var i = range.indexOf(y);
-	    return i < 0 ? [NaN, NaN]
-	        : i < 1 ? [x0, domain[0]]
-	        : i >= n ? [domain[n - 1], x1]
-	        : [domain[i - 1], domain[i]];
+	    return _searchNameStripped;
 	  };
 
-	  scale.unknown = function(_) {
-	    return arguments.length ? (unknown = _, scale) : scale;
+	  _this.isFallback = function () {
+	    var tagCount = Object.keys(_this.tags).length;
+	    return tagCount === 0 || tagCount === 1 && _this.tags.hasOwnProperty('area');
 	  };
 
-	  scale.thresholds = function() {
-	    return domain.slice();
+	  _this.addable = function (val) {
+	    if (!arguments.length) return _addable;
+	    _addable = val;
+	    return _this;
 	  };
 
-	  scale.copy = function() {
-	    return quantize()
-	        .domain([x0, x1])
-	        .range(range)
-	        .unknown(unknown);
-	  };
+	  _this.reference = function () {
+	    // Lookup documentation on Wikidata...
+	    var qid = _this.tags.wikidata || _this.tags['flag:wikidata'] || _this.tags['brand:wikidata'] || _this.tags['network:wikidata'] || _this.tags['operator:wikidata'];
 
-	  return initRange.apply(linearish(scale), arguments);
-	}
+	    if (qid) {
+	      return {
+	        qid: qid
+	      };
+	    } // Lookup documentation on OSM Wikibase...
 
-	function behaviorBreathe() {
-	    var duration = 800;
-	    var steps = 4;
-	    var selector = '.selected.shadow, .selected .shadow';
-	    var _selected = select(null);
-	    var _classed = '';
-	    var _params = {};
-	    var _done = false;
-	    var _timer;
-
-
-	    function ratchetyInterpolator(a, b, steps, units) {
-	        a = parseFloat(a);
-	        b = parseFloat(b);
-	        var sample = quantize()
-	            .domain([0, 1])
-	            .range(d3_quantize(d3_interpolateNumber(a, b), steps));
-
-	        return function(t) {
-	            return String(sample(t)) + (units || '');
-	        };
-	    }
 
+	    var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
+	    var value = _this.originalReference.value || _this.tags[key];
 
-	    function reset(selection) {
-	        selection
-	            .style('stroke-opacity', null)
-	            .style('stroke-width', null)
-	            .style('fill-opacity', null)
-	            .style('r', null);
+	    if (value === '*') {
+	      return {
+	        key: key
+	      };
+	    } else {
+	      return {
+	        key: key,
+	        value: value
+	      };
 	    }
+	  };
 
+	  _this.unsetTags = function (tags, geometry, ignoringKeys, skipFieldDefaults) {
+	    // allow manually keeping some tags
+	    var removeTags = ignoringKeys ? utilObjectOmit(_this.removeTags, ignoringKeys) : _this.removeTags;
+	    tags = utilObjectOmit(tags, Object.keys(removeTags));
 
-	    function setAnimationParams(transition, fromTo) {
-	        var toFrom = (fromTo === 'from' ? 'to' : 'from');
-
-	        transition
-	            .styleTween('stroke-opacity', function(d) {
-	                return ratchetyInterpolator(
-	                    _params[d.id][toFrom].opacity,
-	                    _params[d.id][fromTo].opacity,
-	                    steps
-	                );
-	            })
-	            .styleTween('stroke-width', function(d) {
-	                return ratchetyInterpolator(
-	                    _params[d.id][toFrom].width,
-	                    _params[d.id][fromTo].width,
-	                    steps,
-	                    'px'
-	                );
-	            })
-	            .styleTween('fill-opacity', function(d) {
-	                return ratchetyInterpolator(
-	                    _params[d.id][toFrom].opacity,
-	                    _params[d.id][fromTo].opacity,
-	                    steps
-	                );
-	            })
-	            .styleTween('r', function(d) {
-	                return ratchetyInterpolator(
-	                    _params[d.id][toFrom].width,
-	                    _params[d.id][fromTo].width,
-	                    steps,
-	                    'px'
-	                );
-	            });
+	    if (geometry && !skipFieldDefaults) {
+	      _this.fields().forEach(function (field) {
+	        if (field.matchGeometry(geometry) && field.key && field["default"] === tags[field.key]) {
+	          delete tags[field.key];
+	        }
+	      });
 	    }
 
+	    delete tags.area;
+	    return tags;
+	  };
 
-	    function calcAnimationParams(selection) {
-	        selection
-	            .call(reset)
-	            .each(function(d) {
-	                var s = select(this);
-	                var tag = s.node().tagName;
-	                var p = {'from': {}, 'to': {}};
-	                var opacity;
-	                var width;
+	  _this.setTags = function (tags, geometry, skipFieldDefaults) {
+	    var addTags = _this.addTags;
+	    tags = Object.assign({}, tags); // shallow copy
 
-	                // determine base opacity and width
-	                if (tag === 'circle') {
-	                    opacity = parseFloat(s.style('fill-opacity') || 0.5);
-	                    width = parseFloat(s.style('r') || 15.5);
-	                } else {
-	                    opacity = parseFloat(s.style('stroke-opacity') || 0.7);
-	                    width = parseFloat(s.style('stroke-width') || 10);
-	                }
+	    for (var k in addTags) {
+	      if (addTags[k] === '*') {
+	        // if this tag is ancillary, don't override an existing value since any value is okay
+	        if (_this.tags[k] || !tags[k] || tags[k] === 'no') {
+	          tags[k] = 'yes';
+	        }
+	      } else {
+	        tags[k] = addTags[k];
+	      }
+	    } // Add area=yes if necessary.
+	    // This is necessary if the geometry is already an area (e.g. user drew an area) AND any of:
+	    // 1. chosen preset could be either an area or a line (`barrier=city_wall`)
+	    // 2. chosen preset doesn't have a key in osmAreaKeys (`railway=station`)
 
-	                // calculate from/to interpolation params..
-	                p.tag = tag;
-	                p.from.opacity = opacity * 0.6;
-	                p.to.opacity = opacity * 1.25;
-	                p.from.width = width * 0.7;
-	                p.to.width = width * (tag === 'circle' ? 1.5 : 1);
-	                _params[d.id] = p;
-	            });
-	    }
 
+	    if (!addTags.hasOwnProperty('area')) {
+	      delete tags.area;
 
-	    function run(surface, fromTo) {
-	        var toFrom = (fromTo === 'from' ? 'to' : 'from');
-	        var currSelected = surface.selectAll(selector);
-	        var currClassed = surface.attr('class');
+	      if (geometry === 'area') {
+	        var needsAreaTag = true;
 
-	        if (_done || currSelected.empty()) {
-	            _selected.call(reset);
-	            _selected = select(null);
-	            return;
+	        if (_this.geometry.indexOf('line') === -1) {
+	          for (var _k2 in addTags) {
+	            if (_k2 in osmAreaKeys) {
+	              needsAreaTag = false;
+	              break;
+	            }
+	          }
 	        }
 
-	        if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
-	            _selected.call(reset);
-	            _classed = currClassed;
-	            _selected = currSelected.call(calcAnimationParams);
+	        if (needsAreaTag) {
+	          tags.area = 'yes';
 	        }
+	      }
+	    }
 
-	        var didCallNextRun = false;
-
-	        _selected
-	            .transition()
-	            .duration(duration)
-	            .call(setAnimationParams, fromTo)
-	            .on('end', function() {
-	                // `end` event is called for each selected element, but we want
-	                // it to run only once
-	                if (!didCallNextRun) {
-	                    surface.call(run, toFrom);
-	                    didCallNextRun = true;
-	                }
-
-	                // if entity was deselected, remove breathe styling
-	                if (!select(this).classed('selected')) {
-	                    reset(select(this));
-	                }
-	            });
+	    if (geometry && !skipFieldDefaults) {
+	      _this.fields().forEach(function (field) {
+	        if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field["default"]) {
+	          tags[field.key] = field["default"];
+	        }
+	      });
 	    }
 
-	    function behavior(surface) {
-	        _done = false;
-	        _timer = timer(function() {
-	            // wait for elements to actually become selected
-	            if (surface.selectAll(selector).empty()) {
-	                return false;
-	            }
+	    return tags;
+	  }; // For a preset without fields, use the fields of the parent preset.
+	  // Replace {preset} placeholders with the fields of the specified presets.
 
-	            surface.call(run, 'from');
-	            _timer.stop();
-	            return true;
-	        }, 20);
-	    }
 
-	    behavior.restartIfNeeded = function(surface) {
-	        if (_selected.empty()) {
-	            surface.call(run, 'from');
-	            if (_timer) {
-	                _timer.stop();
-	            }
-	        }
-	    };
+	  function resolve(which) {
+	    var fieldIDs = which === 'fields' ? _this.originalFields : _this.originalMoreFields;
+	    var resolved = [];
+	    fieldIDs.forEach(function (fieldID) {
+	      var match = fieldID.match(/\{(.*)\}/);
 
-	    behavior.off = function() {
-	        _done = true;
-	        if (_timer) {
-	            _timer.stop();
-	        }
-	        _selected
-	            .interrupt()
-	            .call(reset);
-	    };
+	      if (match !== null) {
+	        // a presetID wrapped in braces {}
+	        resolved = resolved.concat(inheritFields(match[1], which));
+	      } else if (allFields[fieldID]) {
+	        // a normal fieldID
+	        resolved.push(allFields[fieldID]);
+	      } else {
+	        console.log("Cannot resolve \"".concat(fieldID, "\" found in ").concat(_this.id, ".").concat(which)); // eslint-disable-line no-console
+	      }
+	    }); // no fields resolved, so use the parent's if possible
 
+	    if (!resolved.length) {
+	      var endIndex = _this.id.lastIndexOf('/');
 
-	    return behavior;
-	}
+	      var parentID = endIndex && _this.id.substring(0, endIndex);
 
-	/* Creates a keybinding behavior for an operation */
-	function behaviorOperation(context) {
-	    var _operation;
+	      if (parentID) {
+	        resolved = inheritFields(parentID, which);
+	      }
+	    }
 
-	    function keypress() {
-	        // prevent operations during low zoom selection
-	        if (!context.map().withinEditableZoom()) { return; }
+	    return utilArrayUniq(resolved); // returns an array of fields to inherit from the given presetID, if found
 
-	        event.preventDefault();
-	        var disabled = _operation.disabled();
+	    function inheritFields(presetID, which) {
+	      var parent = allPresets[presetID];
+	      if (!parent) return [];
 
-	        if (disabled) {
-	            context.ui().flash
-	                .duration(4000)
-	                .iconName('#iD-operation-' + _operation.id)
-	                .iconClass('operation disabled')
-	                .text(_operation.tooltip)();
+	      if (which === 'fields') {
+	        return parent.fields().filter(shouldInherit);
+	      } else if (which === 'moreFields') {
+	        return parent.moreFields();
+	      } else {
+	        return [];
+	      }
+	    } // Skip `fields` for the keys which define the preset.
+	    // These are usually `typeCombo` fields like `shop=*`
 
-	        } else {
-	            context.ui().flash
-	                .duration(2000)
-	                .iconName('#iD-operation-' + _operation.id)
-	                .iconClass('operation')
-	                .text(_operation.annotation() || _operation.title)();
 
-	            if (_operation.point) { _operation.point(null); }
-	            _operation();
-	        }
+	    function shouldInherit(f) {
+	      if (f.key && _this.tags[f.key] !== undefined && // inherit anyway if multiple values are allowed or just a checkbox
+	      f.type !== 'multiCombo' && f.type !== 'semiCombo' && f.type !== 'manyCombo' && f.type !== 'check') return false;
+	      return true;
 	    }
+	  }
 
+	  return _this;
+	}
 
-	    function behavior() {
-	        if (_operation && _operation.available()) {
-	            context.keybinding()
-	                .on(_operation.keys, keypress);
-	        }
-
-	        return behavior;
-	    }
+	var _mainPresetIndex = presetIndex(); // singleton
+	// `presetIndex` wraps a `presetCollection`
+	// with methods for loading new data and returning defaults
+	//
 
+	function presetIndex() {
+	  var dispatch = dispatch$8('favoritePreset', 'recentsChange');
+	  var MAXRECENTS = 30; // seed the preset lists with geometry fallbacks
 
-	    behavior.off = function() {
-	        context.keybinding()
-	            .off(_operation.keys);
-	    };
+	  var POINT = presetPreset('point', {
+	    name: 'Point',
+	    tags: {},
+	    geometry: ['point', 'vertex'],
+	    matchScore: 0.1
+	  });
+	  var LINE = presetPreset('line', {
+	    name: 'Line',
+	    tags: {},
+	    geometry: ['line'],
+	    matchScore: 0.1
+	  });
+	  var AREA = presetPreset('area', {
+	    name: 'Area',
+	    tags: {
+	      area: 'yes'
+	    },
+	    geometry: ['area'],
+	    matchScore: 0.1
+	  });
+	  var RELATION = presetPreset('relation', {
+	    name: 'Relation',
+	    tags: {},
+	    geometry: ['relation'],
+	    matchScore: 0.1
+	  });
 
+	  var _this = presetCollection([POINT, LINE, AREA, RELATION]);
 
-	    behavior.which = function (_) {
-	        if (!arguments.length) { return _operation; }
-	        _operation = _;
-	        return behavior;
-	    };
+	  var _presets = {
+	    point: POINT,
+	    line: LINE,
+	    area: AREA,
+	    relation: RELATION
+	  };
+	  var _defaults = {
+	    point: presetCollection([POINT]),
+	    vertex: presetCollection([POINT]),
+	    line: presetCollection([LINE]),
+	    area: presetCollection([AREA]),
+	    relation: presetCollection([RELATION])
+	  };
+	  var _fields = {};
+	  var _categories = {};
+	  var _universal = [];
+	  var _addablePresetIDs = null; // Set of preset IDs that the user can add
 
+	  var _recents;
 
-	    return behavior;
-	}
+	  var _favorites; // Index of presets by (geometry, tag key).
 
-	function operationCircularize(context, selectedIDs) {
-	    var _extent;
-	    var _actions = selectedIDs.map(getAction).filter(Boolean);
-	    var _amount = _actions.length === 1 ? 'single' : 'multiple';
-	    var _coords = utilGetAllNodes(selectedIDs, context.graph())
-	        .map(function(n) { return n.loc; });
 
-	    function getAction(entityID) {
+	  var _geometryIndex = {
+	    point: {},
+	    vertex: {},
+	    line: {},
+	    area: {},
+	    relation: {}
+	  };
 
-	        var entity = context.entity(entityID);
+	  var _loadPromise;
 
-	        if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) { return null; }
+	  _this.ensureLoaded = function () {
+	    if (_loadPromise) return _loadPromise;
+	    return _loadPromise = Promise.all([_mainFileFetcher.get('preset_categories'), _mainFileFetcher.get('preset_defaults'), _mainFileFetcher.get('preset_presets'), _mainFileFetcher.get('preset_fields')]).then(function (vals) {
+	      _this.merge({
+	        categories: vals[0],
+	        defaults: vals[1],
+	        presets: vals[2],
+	        fields: vals[3]
+	      });
 
-	        if (!_extent) {
-	            _extent =  entity.extent(context.graph());
-	        } else {
-	            _extent = _extent.extend(entity.extent(context.graph()));
-	        }
+	      osmSetAreaKeys(_this.areaKeys());
+	      osmSetPointTags(_this.pointTags());
+	      osmSetVertexTags(_this.vertexTags());
+	    });
+	  }; // `merge` accepts an object containing new preset data (all properties optional):
+	  // {
+	  //   fields: {},
+	  //   presets: {},
+	  //   categories: {},
+	  //   defaults: {},
+	  //   featureCollection: {}
+	  //}
 
-	        return actionCircularize(entityID, context.projection);
-	    }
 
-	    var operation = function() {
-	        if (!_actions.length) { return; }
+	  _this.merge = function (d) {
+	    var newLocationSets = []; // Merge Fields
 
-	        var combinedAction = function(graph, t) {
-	            _actions.forEach(function(action) {
-	                if (!action.disabled(graph)) {
-	                    graph = action(graph, t);
-	                }
-	            });
-	            return graph;
-	        };
-	        combinedAction.transitionable = true;
+	    if (d.fields) {
+	      Object.keys(d.fields).forEach(function (fieldID) {
+	        var f = d.fields[fieldID];
 
-	        context.perform(combinedAction, operation.annotation());
+	        if (f) {
+	          // add or replace
+	          f = presetField(fieldID, f);
+	          if (f.locationSet) newLocationSets.push(f);
+	          _fields[fieldID] = f;
+	        } else {
+	          // remove
+	          delete _fields[fieldID];
+	        }
+	      });
+	    } // Merge Presets
 
-	        window.setTimeout(function() {
-	            context.validator().validate();
-	        }, 300);  // after any transition
-	    };
 
+	    if (d.presets) {
+	      Object.keys(d.presets).forEach(function (presetID) {
+	        var p = d.presets[presetID];
 
-	    operation.available = function() {
-	        return _actions.length && selectedIDs.length === _actions.length;
-	    };
+	        if (p) {
+	          // add or replace
+	          var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);
 
+	          p = presetPreset(presetID, p, isAddable, _fields, _presets);
+	          if (p.locationSet) newLocationSets.push(p);
+	          _presets[presetID] = p;
+	        } else {
+	          // remove (but not if it's a fallback)
+	          var existing = _presets[presetID];
 
-	    // don't cache this because the visible extent could change
-	    operation.disabled = function() {
-	        if (!_actions.length) { return ''; }
+	          if (existing && !existing.isFallback()) {
+	            delete _presets[presetID];
+	          }
+	        }
+	      });
+	    } // Merge Categories
 
-	        var actionDisableds = _actions.map(function(action) {
-	            return action.disabled(context.graph());
-	        }).filter(Boolean);
 
-	        if (actionDisableds.length === _actions.length) {
-	            // none of the features can be circularized
+	    if (d.categories) {
+	      Object.keys(d.categories).forEach(function (categoryID) {
+	        var c = d.categories[categoryID];
 
-	            if (new Set(actionDisableds).size > 1) {
-	                return 'multiple_blockers';
-	            }
-	            return actionDisableds[0];
-	        } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
+	        if (c) {
+	          // add or replace
+	          c = presetCategory(categoryID, c, _presets);
+	          if (c.locationSet) newLocationSets.push(c);
+	          _categories[categoryID] = c;
+	        } else {
+	          // remove
+	          delete _categories[categoryID];
 	        }
+	      });
+	    } // Rebuild _this.collection after changing presets and categories
 
-	        return false;
 
+	    _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Defaults
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
+	    if (d.defaults) {
+	      Object.keys(d.defaults).forEach(function (geometry) {
+	        var def = d.defaults[geometry];
+
+	        if (Array.isArray(def)) {
+	          // add or replace
+	          _defaults[geometry] = presetCollection(def.map(function (id) {
+	            return _presets[id] || _categories[id];
+	          }).filter(Boolean));
+	        } else {
+	          // remove
+	          delete _defaults[geometry];
 	        }
-	    };
+	      });
+	    } // Rebuild universal fields array
 
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.circularize.' + disable + '.' + _amount) :
-	            _t('operations.circularize.description.' + _amount);
-	    };
+	    _universal = Object.values(_fields).filter(function (field) {
+	      return field.universal;
+	    }); // Reset all the preset fields - they'll need to be resolved again
 
+	    Object.values(_presets).forEach(function (preset) {
+	      return preset.resetFields();
+	    }); // Rebuild geometry index
 
-	    operation.annotation = function() {
-	        return _t('operations.circularize.annotation.' + _amount);
+	    _geometryIndex = {
+	      point: {},
+	      vertex: {},
+	      line: {},
+	      area: {},
+	      relation: {}
 	    };
 
+	    _this.collection.forEach(function (preset) {
+	      (preset.geometry || []).forEach(function (geometry) {
+	        var g = _geometryIndex[geometry];
 
-	    operation.id = 'circularize';
-	    operation.keys = [_t('operations.circularize.key')];
-	    operation.title = _t('operations.circularize.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	        for (var key in preset.tags) {
+	          g[key] = g[key] || {};
+	          var value = preset.tags[key];
+	          (g[key][value] = g[key][value] || []).push(preset);
+	        }
+	      });
+	    }); // Merge Custom Features
 
-	    return operation;
-	}
 
-	// Translate a MacOS key command into the appropriate Windows/Linux equivalent.
-	// For example, ⌘Z -> Ctrl+Z
-	var uiCmd = function (code) {
-	    var detected = utilDetect();
+	    if (d.featureCollection && Array.isArray(d.featureCollection.features)) {
+	      _mainLocations.mergeCustomGeoJSON(d.featureCollection);
+	    } // Resolve all locationSet features.
 
-	    if (detected.os === 'mac') {
-	        return code;
-	    }
 
-	    if (detected.os === 'win') {
-	        if (code === '⌘⇧Z') { return 'Ctrl+Y'; }
+	    if (newLocationSets.length) {
+	      _mainLocations.mergeLocationSets(newLocationSets);
 	    }
 
-	    var result = '',
-	        replacements = {
-	            '⌘': 'Ctrl',
-	            '⇧': 'Shift',
-	            '⌥': 'Alt',
-	            '⌫': 'Backspace',
-	            '⌦': 'Delete'
-	        };
+	    return _this;
+	  };
 
-	    for (var i = 0; i < code.length; i++) {
-	        if (code[i] in replacements) {
-	            result += replacements[code[i]] + (i < code.length - 1 ? '+' : '');
-	        } else {
-	            result += code[i];
-	        }
-	    }
+	  _this.match = function (entity, resolver) {
+	    return resolver["transient"](entity, 'presetMatch', function () {
+	      var geometry = entity.geometry(resolver); // Treat entities on addr:interpolation lines as points, not vertices - #3241
 
-	    return result;
-	};
+	      if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
+	        geometry = 'point';
+	      }
 
+	      var entityExtent = entity.extent(resolver);
+	      return _this.matchTags(entity.tags, geometry, entityExtent.center());
+	    });
+	  };
 
-	// return a display-focused string for a given keyboard code
-	uiCmd.display = function(code) {
-	    if (code.length !== 1) { return code; }
+	  _this.matchTags = function (tags, geometry, loc) {
+	    var keyIndex = _geometryIndex[geometry];
+	    var bestScore = -1;
+	    var bestMatch;
+	    var matchCandidates = [];
 
-	    var detected = utilDetect();
-	    var mac = (detected.os === 'mac');
-	    var replacements = {
-	        '⌘': mac ? '⌘ ' + _t('shortcuts.key.cmd')    : _t('shortcuts.key.ctrl'),
-	        '⇧': mac ? '⇧ ' + _t('shortcuts.key.shift')  : _t('shortcuts.key.shift'),
-	        '⌥': mac ? '⌥ ' + _t('shortcuts.key.option') : _t('shortcuts.key.alt'),
-	        '⌃': mac ? '⌃ ' + _t('shortcuts.key.ctrl')   : _t('shortcuts.key.ctrl'),
-	        '⌫': mac ? '⌫ ' + _t('shortcuts.key.delete') : _t('shortcuts.key.backspace'),
-	        '⌦': mac ? '⌦ ' + _t('shortcuts.key.del')    : _t('shortcuts.key.del'),
-	        '↖': mac ? '↖ ' + _t('shortcuts.key.pgup')   : _t('shortcuts.key.pgup'),
-	        '↘': mac ? '↘ ' + _t('shortcuts.key.pgdn')   : _t('shortcuts.key.pgdn'),
-	        '⇞': mac ? '⇞ ' + _t('shortcuts.key.home')   : _t('shortcuts.key.home'),
-	        '⇟': mac ? '⇟ ' + _t('shortcuts.key.end')    : _t('shortcuts.key.end'),
-	        '↵': mac ? '⏎ ' + _t('shortcuts.key.return') : _t('shortcuts.key.enter'),
-	        '⎋': mac ? '⎋ ' + _t('shortcuts.key.esc')    : _t('shortcuts.key.esc'),
-	        '☰': mac ? '☰ ' + _t('shortcuts.key.menu')  : _t('shortcuts.key.menu'),
-	    };
+	    for (var k in tags) {
+	      var indexMatches = [];
+	      var valueIndex = keyIndex[k];
+	      if (!valueIndex) continue;
+	      var keyValueMatches = valueIndex[tags[k]];
+	      if (keyValueMatches) indexMatches.push.apply(indexMatches, _toConsumableArray(keyValueMatches));
+	      var keyStarMatches = valueIndex['*'];
+	      if (keyStarMatches) indexMatches.push.apply(indexMatches, _toConsumableArray(keyStarMatches));
+	      if (indexMatches.length === 0) continue;
+
+	      for (var i = 0; i < indexMatches.length; i++) {
+	        var candidate = indexMatches[i];
+	        var score = candidate.matchScore(tags);
+
+	        if (score === -1) {
+	          continue;
+	        }
 
-	    return replacements[code] || code;
-	};
+	        matchCandidates.push({
+	          score: score,
+	          candidate: candidate
+	        });
 
-	function operationDelete(context, selectedIDs) {
-	    var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-	    var action = actionDeleteMultiple(selectedIDs);
-	    var nodes = utilGetAllNodes(selectedIDs, context.graph());
-	    var coords = nodes.map(function(n) { return n.loc; });
-	    var extent = utilTotalExtent(selectedIDs, context.graph());
+	        if (score > bestScore) {
+	          bestScore = score;
+	          bestMatch = candidate;
+	        }
+	      }
+	    }
 
+	    if (bestMatch && bestMatch.locationSetID && bestMatch.locationSetID !== '+[Q2]' && Array.isArray(loc)) {
+	      var validLocations = _mainLocations.locationsAt(loc);
 
-	    var operation = function() {
-	        var nextSelectedID;
-	        var nextSelectedLoc;
+	      if (!validLocations[bestMatch.locationSetID]) {
+	        matchCandidates.sort(function (a, b) {
+	          return a.score < b.score ? 1 : -1;
+	        });
 
-	        if (selectedIDs.length === 1) {
-	            var id = selectedIDs[0];
-	            var entity = context.entity(id);
-	            var geometry = entity.geometry(context.graph());
-	            var parents = context.graph().parentWays(entity);
-	            var parent = parents[0];
-
-	            // Select the next closest node in the way.
-	            if (geometry === 'vertex') {
-	                var nodes = parent.nodes;
-	                var i = nodes.indexOf(id);
-
-	                if (i === 0) {
-	                    i++;
-	                } else if (i === nodes.length - 1) {
-	                    i--;
-	                } else {
-	                    var a = geoSphericalDistance(entity.loc, context.entity(nodes[i - 1]).loc);
-	                    var b = geoSphericalDistance(entity.loc, context.entity(nodes[i + 1]).loc);
-	                    i = a < b ? i - 1 : i + 1;
-	                }
+	        for (var _i = 0; _i < matchCandidates.length; _i++) {
+	          var candidateScore = matchCandidates[_i];
 
-	                nextSelectedID = nodes[i];
-	                nextSelectedLoc = context.entity(nextSelectedID).loc;
-	            }
+	          if (!candidateScore.candidate.locationSetID || validLocations[candidateScore.candidate.locationSetID]) {
+	            bestMatch = candidateScore.candidate;
+	            bestScore = candidateScore.score;
+	            break;
+	          }
 	        }
+	      }
+	    } // If any part of an address is present, allow fallback to "Address" preset - #4353
 
-	        context.perform(action, operation.annotation());
-	        context.validator().validate();
 
-	        if (nextSelectedID && nextSelectedLoc) {
-	            if (context.hasEntity(nextSelectedID)) {
-	                context.enter(modeSelect(context, [nextSelectedID]).follow(true));
-	            } else {
-	                context.map().centerEase(nextSelectedLoc);
-	                context.enter(modeBrowse(context));
-	            }
-	        } else {
-	            context.enter(modeBrowse(context));
+	    if (!bestMatch || bestMatch.isFallback()) {
+	      for (var _k in tags) {
+	        if (/^addr:/.test(_k) && keyIndex['addr:*'] && keyIndex['addr:*']['*']) {
+	          bestMatch = keyIndex['addr:*']['*'][0];
+	          break;
 	        }
+	      }
+	    }
 
-	    };
+	    return bestMatch || _this.fallback(geometry);
+	  };
 
+	  _this.allowsVertex = function (entity, resolver) {
+	    if (entity.type !== 'node') return false;
+	    if (Object.keys(entity.tags).length === 0) return true;
+	    return resolver["transient"](entity, 'vertexMatch', function () {
+	      // address lines allow vertices to act as standalone points
+	      if (entity.isOnAddressLine(resolver)) return true;
+	      var geometries = osmNodeGeometriesForTags(entity.tags);
+	      if (geometries.vertex) return true;
+	      if (geometries.point) return false; // allow vertices for unspecified points
 
-	    operation.available = function() {
-	        return true;
-	    };
+	      return true;
+	    });
+	  }; // Because of the open nature of tagging, iD will never have a complete
+	  // list of tags used in OSM, so we want it to have logic like "assume
+	  // that a closed way with an amenity tag is an area, unless the amenity
+	  // is one of these specific types". This function computes a structure
+	  // that allows testing of such conditions, based on the presets designated
+	  // as as supporting (or not supporting) the area geometry.
+	  //
+	  // The returned object L is a keeplist/discardlist of tags. A closed way
+	  // with a tag (k, v) is considered to be an area if `k in L && !(v in L[k])`
+	  // (see `Way#isArea()`). In other words, the keys of L form the keeplist,
+	  // and the subkeys form the discardlist.
 
 
-	    operation.disabled = function() {
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        } else if (selectedIDs.some(protectedMember)) {
-	            return 'part_of_relation';
-	        } else if (selectedIDs.some(incompleteRelation)) {
-	            return 'incomplete_relation';
-	        } else if (selectedIDs.some(hasWikidataTag)) {
-	            return 'has_wikidata_tag';
-	        }
+	  _this.areaKeys = function () {
+	    // The ignore list is for keys that imply lines. (We always add `area=yes` for exceptions)
+	    var ignore = ['barrier', 'highway', 'footway', 'railway', 'junction', 'type'];
+	    var areaKeys = {}; // ignore name-suggestion-index and deprecated presets
 
-	        return false;
+	    var presets = _this.collection.filter(function (p) {
+	      return !p.suggestion && !p.replacement;
+	    }); // keeplist
 
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
+	    presets.forEach(function (p) {
+	      var keys = p.tags && Object.keys(p.tags);
+	      var key = keys && keys.length && keys[0]; // pick the first tag
 
-	        function hasWikidataTag(id) {
-	            var entity = context.entity(id);
-	            return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-	        }
+	      if (!key) return;
+	      if (ignore.indexOf(key) !== -1) return;
 
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
-	        }
+	      if (p.geometry.indexOf('area') !== -1) {
+	        // probably an area..
+	        areaKeys[key] = areaKeys[key] || {};
+	      }
+	    }); // discardlist
 
-	        function protectedMember(id) {
-	            var entity = context.entity(id);
-	            if (entity.type !== 'way') { return false; }
-
-	            var parents = context.graph().parentRelations(entity);
-	            for (var i = 0; i < parents.length; i++) {
-	                var parent = parents[i];
-	                var type = parent.tags.type;
-	                var role = parent.memberById(id).role || 'outer';
-	                if (type === 'route' || type === 'boundary' || (type === 'multipolygon' && role === 'outer')) {
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
-	    };
+	    presets.forEach(function (p) {
+	      var key;
 
+	      for (key in p.addTags) {
+	        // examine all addTags to get a better sense of what can be tagged on lines - #6800
+	        var value = p.addTags[key];
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.delete.' + disable + '.' + multi) :
-	            _t('operations.delete.description' + '.' + multi);
-	    };
+	        if (key in areaKeys && // probably an area...
+	        p.geometry.indexOf('line') !== -1 && // but sometimes a line
+	        value !== '*') {
+	          areaKeys[key][value] = true;
+	        }
+	      }
+	    });
+	    return areaKeys;
+	  };
 
+	  _this.pointTags = function () {
+	    return _this.collection.reduce(function (pointTags, d) {
+	      // ignore name-suggestion-index, deprecated, and generic presets
+	      if (d.suggestion || d.replacement || d.searchable === false) return pointTags; // only care about the primary tag
 
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) :
-	            _t('operations.delete.annotation.multiple', { n: selectedIDs.length });
-	    };
+	      var keys = d.tags && Object.keys(d.tags);
+	      var key = keys && keys.length && keys[0]; // pick the first tag
 
+	      if (!key) return pointTags; // if this can be a point
 
-	    operation.id = 'delete';
-	    operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
-	    operation.title = _t('operations.delete.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	      if (d.geometry.indexOf('point') !== -1) {
+	        pointTags[key] = pointTags[key] || {};
+	        pointTags[key][d.tags[key]] = true;
+	      }
 
-	    return operation;
-	}
+	      return pointTags;
+	    }, {});
+	  };
 
-	function operationOrthogonalize(context, selectedIDs) {
-	    var _extent;
-	    var _type;
-	    var _actions = selectedIDs.map(chooseAction).filter(Boolean);
-	    var _amount = _actions.length === 1 ? 'single' : 'multiple';
-	    var _coords = utilGetAllNodes(selectedIDs, context.graph())
-	        .map(function(n) { return n.loc; });
+	  _this.vertexTags = function () {
+	    return _this.collection.reduce(function (vertexTags, d) {
+	      // ignore name-suggestion-index, deprecated, and generic presets
+	      if (d.suggestion || d.replacement || d.searchable === false) return vertexTags; // only care about the primary tag
 
+	      var keys = d.tags && Object.keys(d.tags);
+	      var key = keys && keys.length && keys[0]; // pick the first tag
 
-	    function chooseAction(entityID) {
+	      if (!key) return vertexTags; // if this can be a vertex
 
-	        var entity = context.entity(entityID);
-	        var geometry = entity.geometry(context.graph());
+	      if (d.geometry.indexOf('vertex') !== -1) {
+	        vertexTags[key] = vertexTags[key] || {};
+	        vertexTags[key][d.tags[key]] = true;
+	      }
 
-	        if (!_extent) {
-	            _extent =  entity.extent(context.graph());
-	        } else {
-	            _extent = _extent.extend(entity.extent(context.graph()));
-	        }
-
-	        // square a line/area
-	        if (entity.type === 'way' && new Set(entity.nodes).size > 2 ) {
-	            if (_type && _type !== 'feature') { return null; }
-	            _type = 'feature';
-	            return actionOrthogonalize(entityID, context.projection);
-
-	        // square a single vertex
-	        } else if (geometry === 'vertex') {
-	            if (_type && _type !== 'corner') { return null; }
-	            _type = 'corner';
-	            var graph = context.graph();
-	            var parents = graph.parentWays(entity);
-	            if (parents.length === 1) {
-	                var way = parents[0];
-	                if (way.nodes.indexOf(entityID) !== -1) {
-	                    return actionOrthogonalize(way.id, context.projection, entityID);
-	                }
-	            }
-	        }
+	      return vertexTags;
+	    }, {});
+	  };
 
-	        return null;
-	    }
+	  _this.field = function (id) {
+	    return _fields[id];
+	  };
 
+	  _this.universal = function () {
+	    return _universal;
+	  };
 
-	    var operation = function() {
-	        if (!_actions.length) { return; }
+	  _this.defaults = function (geometry, n, startWithRecents, loc) {
+	    var recents = [];
 
-	        var combinedAction = function(graph, t) {
-	            _actions.forEach(function(action) {
-	                if (!action.disabled(graph)) {
-	                    graph = action(graph, t);
-	                }
-	            });
-	            return graph;
-	        };
-	        combinedAction.transitionable = true;
+	    if (startWithRecents) {
+	      recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
+	    }
 
-	        context.perform(combinedAction, operation.annotation());
+	    var defaults;
 
-	        window.setTimeout(function() {
-	            context.validator().validate();
-	        }, 300);  // after any transition
-	    };
+	    if (_addablePresetIDs) {
+	      defaults = Array.from(_addablePresetIDs).map(function (id) {
+	        var preset = _this.item(id);
 
+	        if (preset && preset.matchGeometry(geometry)) return preset;
+	        return null;
+	      }).filter(Boolean);
+	    } else {
+	      defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
+	    }
 
-	    operation.available = function() {
-	        return _actions.length && selectedIDs.length === _actions.length;
-	    };
+	    var result = presetCollection(utilArrayUniq(recents.concat(defaults)).slice(0, n - 1));
 
+	    if (Array.isArray(loc)) {
+	      var validLocations = _mainLocations.locationsAt(loc);
+	      result.collection = result.collection.filter(function (a) {
+	        return !a.locationSetID || validLocations[a.locationSetID];
+	      });
+	    }
 
-	    // don't cache this because the visible extent could change
-	    operation.disabled = function() {
-	        if (!_actions.length) { return ''; }
+	    return result;
+	  }; // pass a Set of addable preset ids
 
-	        var actionDisableds = _actions.map(function(action) {
-	            return action.disabled(context.graph());
-	        }).filter(Boolean);
 
-	        if (actionDisableds.length === _actions.length) {
-	            // none of the features can be squared
+	  _this.addablePresetIDs = function (val) {
+	    if (!arguments.length) return _addablePresetIDs; // accept and convert arrays
 
-	            if (new Set(actionDisableds).size > 1) {
-	                return 'multiple_blockers';
-	            }
-	            return actionDisableds[0];
-	        } else if (_extent &&
-	                   _extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        }
+	    if (Array.isArray(val)) val = new Set(val);
+	    _addablePresetIDs = val;
 
-	        return false;
+	    if (_addablePresetIDs) {
+	      // reset all presets
+	      _this.collection.forEach(function (p) {
+	        // categories aren't addable
+	        if (p.addable) p.addable(_addablePresetIDs.has(p.id));
+	      });
+	    } else {
+	      _this.collection.forEach(function (p) {
+	        if (p.addable) p.addable(true);
+	      });
+	    }
 
+	    return _this;
+	  };
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
-	    };
+	  _this.recent = function () {
+	    return presetCollection(utilArrayUniq(_this.getRecents().map(function (d) {
+	      return d.preset;
+	    })));
+	  };
 
+	  function RibbonItem(preset, source) {
+	    var item = {};
+	    item.preset = preset;
+	    item.source = source;
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.orthogonalize.' + disable + '.' + _amount) :
-	            _t('operations.orthogonalize.description.' + _type + '.' + _amount);
+	    item.isFavorite = function () {
+	      return item.source === 'favorite';
 	    };
 
-
-	    operation.annotation = function() {
-	        return _t('operations.orthogonalize.annotation.' + _type + '.' + _amount);
+	    item.isRecent = function () {
+	      return item.source === 'recent';
 	    };
 
+	    item.matches = function (preset) {
+	      return item.preset.id === preset.id;
+	    };
 
-	    operation.id = 'orthogonalize';
-	    operation.keys = [_t('operations.orthogonalize.key')];
-	    operation.title = _t('operations.orthogonalize.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
-
-	    return operation;
-	}
-
-	function operationReflectShort(context, selectedIDs) {
-	    return operationReflect(context, selectedIDs, 'short');
-	}
-
-
-	function operationReflectLong(context, selectedIDs) {
-	    return operationReflect(context, selectedIDs, 'long');
-	}
+	    item.minified = function () {
+	      return {
+	        pID: item.preset.id
+	      };
+	    };
 
+	    return item;
+	  }
 
-	function operationReflect(context, selectedIDs, axis) {
-	    axis = axis || 'long';
-	    var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-	    var nodes = utilGetAllNodes(selectedIDs, context.graph());
-	    var coords = nodes.map(function(n) { return n.loc; });
-	    var extent = utilTotalExtent(selectedIDs, context.graph());
+	  function ribbonItemForMinified(d, source) {
+	    if (d && d.pID) {
+	      var preset = _this.item(d.pID);
 
+	      if (!preset) return null;
+	      return RibbonItem(preset, source);
+	    }
 
-	    var operation = function() {
-	        var action = actionReflect(selectedIDs, context.projection)
-	            .useLongAxis(Boolean(axis === 'long'));
+	    return null;
+	  }
 
-	        context.perform(action, operation.annotation());
+	  _this.getGenericRibbonItems = function () {
+	    return ['point', 'line', 'area'].map(function (id) {
+	      return RibbonItem(_this.item(id), 'generic');
+	    });
+	  };
 
-	        window.setTimeout(function() {
-	            context.validator().validate();
-	        }, 300);  // after any transition
-	    };
+	  _this.getAddable = function () {
+	    if (!_addablePresetIDs) return [];
+	    return _addablePresetIDs.map(function (id) {
+	      var preset = _this.item(id);
 
+	      if (preset) return RibbonItem(preset, 'addable');
+	      return null;
+	    }).filter(Boolean);
+	  };
 
-	    operation.available = function() {
-	        return nodes.length >= 3;
-	    };
+	  function setRecents(items) {
+	    _recents = items;
+	    var minifiedItems = items.map(function (d) {
+	      return d.minified();
+	    });
+	    corePreferences('preset_recents', JSON.stringify(minifiedItems));
+	    dispatch.call('recentsChange');
+	  }
 
+	  _this.getRecents = function () {
+	    if (!_recents) {
+	      // fetch from local storage
+	      _recents = (JSON.parse(corePreferences('preset_recents')) || []).reduce(function (acc, d) {
+	        var item = ribbonItemForMinified(d, 'recent');
+	        if (item && item.preset.addable()) acc.push(item);
+	        return acc;
+	      }, []);
+	    }
 
-	    // don't cache this because the visible extent could change
-	    operation.disabled = function() {
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        } else if (selectedIDs.some(incompleteRelation)) {
-	            return 'incomplete_relation';
-	        }
+	    return _recents;
+	  };
 
-	        return false;
+	  _this.addRecent = function (preset, besidePreset, after) {
+	    var recents = _this.getRecents();
 
+	    var beforeItem = _this.recentMatching(besidePreset);
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
+	    var toIndex = recents.indexOf(beforeItem);
+	    if (after) toIndex += 1;
+	    var newItem = RibbonItem(preset, 'recent');
+	    recents.splice(toIndex, 0, newItem);
+	    setRecents(recents);
+	  };
 
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
-	        }
-	    };
+	  _this.removeRecent = function (preset) {
+	    var item = _this.recentMatching(preset);
 
+	    if (item) {
+	      var items = _this.getRecents();
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.reflect.' + disable + '.' + multi) :
-	            _t('operations.reflect.description.' + axis + '.' + multi);
-	    };
+	      items.splice(items.indexOf(item), 1);
+	      setRecents(items);
+	    }
+	  };
 
+	  _this.recentMatching = function (preset) {
+	    var items = _this.getRecents();
 
-	    operation.annotation = function() {
-	        return _t('operations.reflect.annotation.' + axis + '.' + multi);
-	    };
+	    for (var i in items) {
+	      if (items[i].matches(preset)) {
+	        return items[i];
+	      }
+	    }
 
+	    return null;
+	  };
 
-	    operation.id = 'reflect-' + axis;
-	    operation.keys = [_t('operations.reflect.key.' + axis)];
-	    operation.title = _t('operations.reflect.title.' + axis);
-	    operation.behavior = behaviorOperation(context).which(operation);
+	  _this.moveItem = function (items, fromIndex, toIndex) {
+	    if (fromIndex === toIndex || fromIndex < 0 || toIndex < 0 || fromIndex >= items.length || toIndex >= items.length) return null;
+	    items.splice(toIndex, 0, items.splice(fromIndex, 1)[0]);
+	    return items;
+	  };
 
-	    return operation;
-	}
+	  _this.moveRecent = function (item, beforeItem) {
+	    var recents = _this.getRecents();
 
-	function operationMove(context, selectedIDs) {
-	    var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-	    var nodes = utilGetAllNodes(selectedIDs, context.graph());
-	    var coords = nodes.map(function(n) { return n.loc; });
-	    var extent = utilTotalExtent(selectedIDs, context.graph());
+	    var fromIndex = recents.indexOf(item);
+	    var toIndex = recents.indexOf(beforeItem);
 
+	    var items = _this.moveItem(recents, fromIndex, toIndex);
 
-	    var operation = function() {
-	        context.enter(modeMove(context, selectedIDs));
-	    };
+	    if (items) setRecents(items);
+	  };
 
+	  _this.setMostRecent = function (preset) {
+	    if (preset.searchable === false) return;
 
-	    operation.available = function() {
-	        return selectedIDs.length > 1 ||
-	            context.entity(selectedIDs[0]).type !== 'node';
-	    };
+	    var items = _this.getRecents();
 
+	    var item = _this.recentMatching(preset);
 
-	    operation.disabled = function() {
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        } else if (selectedIDs.some(incompleteRelation)) {
-	            return 'incomplete_relation';
-	        }
+	    if (item) {
+	      items.splice(items.indexOf(item), 1);
+	    } else {
+	      item = RibbonItem(preset, 'recent');
+	    } // remove the last recent (first in, first out)
 
-	        return false;
 
+	    while (items.length >= MAXRECENTS) {
+	      items.pop();
+	    } // prepend array
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
 
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
-	        }
-	    };
+	    items.unshift(item);
+	    setRecents(items);
+	  };
 
+	  function setFavorites(items) {
+	    _favorites = items;
+	    var minifiedItems = items.map(function (d) {
+	      return d.minified();
+	    });
+	    corePreferences('preset_favorites', JSON.stringify(minifiedItems)); // call update
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.move.' + disable + '.' + multi) :
-	            _t('operations.move.description.' + multi);
-	    };
+	    dispatch.call('favoritePreset');
+	  }
 
+	  _this.addFavorite = function (preset, besidePreset, after) {
+	    var favorites = _this.getFavorites();
 
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) :
-	            _t('operations.move.annotation.multiple');
-	    };
+	    var beforeItem = _this.favoriteMatching(besidePreset);
 
+	    var toIndex = favorites.indexOf(beforeItem);
+	    if (after) toIndex += 1;
+	    var newItem = RibbonItem(preset, 'favorite');
+	    favorites.splice(toIndex, 0, newItem);
+	    setFavorites(favorites);
+	  };
 
-	    operation.id = 'move';
-	    operation.keys = [_t('operations.move.key')];
-	    operation.title = _t('operations.move.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	  _this.toggleFavorite = function (preset) {
+	    var favs = _this.getFavorites();
 
-	    operation.mouseOnly = true;
+	    var favorite = _this.favoriteMatching(preset);
 
-	    return operation;
-	}
+	    if (favorite) {
+	      favs.splice(favs.indexOf(favorite), 1);
+	    } else {
+	      // only allow 10 favorites
+	      if (favs.length === 10) {
+	        // remove the last favorite (last in, first out)
+	        favs.pop();
+	      } // append array
 
-	function modeRotate(context, entityIDs) {
-	    var mode = {
-	        id: 'rotate',
-	        button: 'browse'
-	    };
 
-	    var keybinding = utilKeybinding('rotate');
-	    var behaviors = [
-	        behaviorEdit(context),
-	        operationCircularize(context, entityIDs).behavior,
-	        operationDelete(context, entityIDs).behavior,
-	        operationMove(context, entityIDs).behavior,
-	        operationOrthogonalize(context, entityIDs).behavior,
-	        operationReflectLong(context, entityIDs).behavior,
-	        operationReflectShort(context, entityIDs).behavior
-	    ];
-	    var annotation = entityIDs.length === 1 ?
-	        _t('operations.rotate.annotation.' + context.graph().geometry(entityIDs[0])) :
-	        _t('operations.rotate.annotation.multiple');
+	      favs.push(RibbonItem(preset, 'favorite'));
+	    }
 
-	    var _prevGraph;
-	    var _prevAngle;
-	    var _prevTransform;
-	    var _pivot;
+	    setFavorites(favs);
+	  };
 
+	  _this.removeFavorite = function (preset) {
+	    var item = _this.favoriteMatching(preset);
 
-	    function doRotate() {
-	        var fn;
-	        if (context.graph() !== _prevGraph) {
-	            fn = context.perform;
-	        } else {
-	            fn = context.replace;
-	        }
+	    if (item) {
+	      var items = _this.getFavorites();
 
-	        // projection changed, recalculate _pivot
-	        var projection = context.projection;
-	        var currTransform = projection.transform();
-	        if (!_prevTransform ||
-	            currTransform.k !== _prevTransform.k ||
-	            currTransform.x !== _prevTransform.x ||
-	            currTransform.y !== _prevTransform.y) {
+	      items.splice(items.indexOf(item), 1);
+	      setFavorites(items);
+	    }
+	  };
 
-	            var nodes = utilGetAllNodes(entityIDs, context.graph());
-	            var points = nodes.map(function(n) { return projection(n.loc); });
-	            _pivot = getPivot(points);
-	            _prevAngle = undefined;
-	        }
+	  _this.getFavorites = function () {
+	    if (!_favorites) {
+	      // fetch from local storage
+	      var rawFavorites = JSON.parse(corePreferences('preset_favorites'));
 
+	      if (!rawFavorites) {
+	        rawFavorites = [];
+	        corePreferences('preset_favorites', JSON.stringify(rawFavorites));
+	      }
 
-	        var currMouse = context.map().mouse();
-	        var currAngle = Math.atan2(currMouse[1] - _pivot[1], currMouse[0] - _pivot[0]);
+	      _favorites = rawFavorites.reduce(function (output, d) {
+	        var item = ribbonItemForMinified(d, 'favorite');
+	        if (item && item.preset.addable()) output.push(item);
+	        return output;
+	      }, []);
+	    }
 
-	        if (typeof _prevAngle === 'undefined') { _prevAngle = currAngle; }
-	        var delta = currAngle - _prevAngle;
+	    return _favorites;
+	  };
 
-	        fn(actionRotate(entityIDs, _pivot, delta, projection));
+	  _this.favoriteMatching = function (preset) {
+	    var favs = _this.getFavorites();
 
-	        _prevTransform = currTransform;
-	        _prevAngle = currAngle;
-	        _prevGraph = context.graph();
+	    for (var index in favs) {
+	      if (favs[index].matches(preset)) {
+	        return favs[index];
+	      }
 	    }
 
-	    function getPivot(points) {
-	        var _pivot;
-	        if (points.length === 1) {
-	            _pivot = points[0];
-	        } else if (points.length === 2) {
-	            _pivot = geoVecInterp(points[0], points[1], 0.5);
-	        } else {
-	            var polygonHull = d3_polygonHull(points);
-	            if (polygonHull.length === 2) {
-	                _pivot = geoVecInterp(points[0], points[1], 0.5);
-	            } else {
-	                _pivot = d3_polygonCentroid(d3_polygonHull(points));
-	            }
-	        }
-	        return _pivot;
-	    }
+	    return null;
+	  };
 
+	  return utilRebind(_this, dispatch, 'on');
+	}
 
-	    function finish() {
-	        event.stopPropagation();
-	        context.replace(actionNoop(), annotation);
-	        context.enter(modeSelect(context, entityIDs));
-	    }
+	function utilTagText(entity) {
+	  var obj = entity && entity.tags || {};
+	  return Object.keys(obj).map(function (k) {
+	    return k + '=' + obj[k];
+	  }).join(', ');
+	}
+	function utilTotalExtent(array, graph) {
+	  var extent = geoExtent();
+	  var val, entity;
 
+	  for (var i = 0; i < array.length; i++) {
+	    val = array[i];
+	    entity = typeof val === 'string' ? graph.hasEntity(val) : val;
 
-	    function cancel() {
-	        context.pop();
-	        context.enter(modeSelect(context, entityIDs));
+	    if (entity) {
+	      extent._extend(entity.extent(graph));
 	    }
+	  }
 
-
-	    function undone() {
-	        context.enter(modeBrowse(context));
+	  return extent;
+	}
+	function utilTagDiff(oldTags, newTags) {
+	  var tagDiff = [];
+	  var keys = utilArrayUnion(Object.keys(oldTags), Object.keys(newTags)).sort();
+	  keys.forEach(function (k) {
+	    var oldVal = oldTags[k];
+	    var newVal = newTags[k];
+
+	    if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
+	      tagDiff.push({
+	        type: '-',
+	        key: k,
+	        oldVal: oldVal,
+	        newVal: newVal,
+	        display: '- ' + k + '=' + oldVal
+	      });
 	    }
 
+	    if ((newVal || newVal === '') && (oldVal === undefined || newVal !== oldVal)) {
+	      tagDiff.push({
+	        type: '+',
+	        key: k,
+	        oldVal: oldVal,
+	        newVal: newVal,
+	        display: '+ ' + k + '=' + newVal
+	      });
+	    }
+	  });
+	  return tagDiff;
+	}
+	function utilEntitySelector(ids) {
+	  return ids.length ? '.' + ids.join(',.') : 'nothing';
+	} // returns an selector to select entity ids for:
+	//  - entityIDs passed in
+	//  - shallow descendant entityIDs for any of those entities that are relations
 
-	    mode.enter = function() {
-	        context.features().forceVisible(entityIDs);
+	function utilEntityOrMemberSelector(ids, graph) {
+	  var seen = new Set(ids);
+	  ids.forEach(collectShallowDescendants);
+	  return utilEntitySelector(Array.from(seen));
+
+	  function collectShallowDescendants(id) {
+	    var entity = graph.hasEntity(id);
+	    if (!entity || entity.type !== 'relation') return;
+	    entity.members.map(function (member) {
+	      return member.id;
+	    }).forEach(function (id) {
+	      seen.add(id);
+	    });
+	  }
+	} // returns an selector to select entity ids for:
+	//  - entityIDs passed in
+	//  - deep descendant entityIDs for any of those entities that are relations
 
-	        behaviors.forEach(context.install);
+	function utilEntityOrDeepMemberSelector(ids, graph) {
+	  return utilEntitySelector(utilEntityAndDeepMemberIDs(ids, graph));
+	} // returns an selector to select entity ids for:
+	//  - entityIDs passed in
+	//  - deep descendant entityIDs for any of those entities that are relations
 
-	        context.surface()
-	            .on('mousemove.rotate', doRotate)
-	            .on('click.rotate', finish);
+	function utilEntityAndDeepMemberIDs(ids, graph) {
+	  var seen = new Set();
+	  ids.forEach(collectDeepDescendants);
+	  return Array.from(seen);
+
+	  function collectDeepDescendants(id) {
+	    if (seen.has(id)) return;
+	    seen.add(id);
+	    var entity = graph.hasEntity(id);
+	    if (!entity || entity.type !== 'relation') return;
+	    entity.members.map(function (member) {
+	      return member.id;
+	    }).forEach(collectDeepDescendants); // recurse
+	  }
+	} // returns an selector to select entity ids for:
+	//  - deep descendant entityIDs for any of those entities that are relations
 
-	        context.history()
-	            .on('undone.rotate', undone);
+	function utilDeepMemberSelector(ids, graph, skipMultipolgonMembers) {
+	  var idsSet = new Set(ids);
+	  var seen = new Set();
+	  var returners = new Set();
+	  ids.forEach(collectDeepDescendants);
+	  return utilEntitySelector(Array.from(returners));
 
-	        keybinding
-	            .on('⎋', cancel)
-	            .on('↩', finish);
+	  function collectDeepDescendants(id) {
+	    if (seen.has(id)) return;
+	    seen.add(id);
 
-	        select(document)
-	            .call(keybinding);
-	    };
+	    if (!idsSet.has(id)) {
+	      returners.add(id);
+	    }
 
+	    var entity = graph.hasEntity(id);
+	    if (!entity || entity.type !== 'relation') return;
+	    if (skipMultipolgonMembers && entity.isMultipolygon()) return;
+	    entity.members.map(function (member) {
+	      return member.id;
+	    }).forEach(collectDeepDescendants); // recurse
+	  }
+	} // Adds or removes highlight styling for the specified entities
 
-	    mode.exit = function() {
-	        behaviors.forEach(context.uninstall);
+	function utilHighlightEntities(ids, highlighted, context) {
+	  context.surface().selectAll(utilEntityOrDeepMemberSelector(ids, context.graph())).classed('highlighted', highlighted);
+	} // returns an Array that is the union of:
+	//  - nodes for any nodeIDs passed in
+	//  - child nodes of any wayIDs passed in
+	//  - descendant member and child nodes of relationIDs passed in
 
-	        context.surface()
-	            .on('mousemove.rotate', null)
-	            .on('click.rotate', null);
+	function utilGetAllNodes(ids, graph) {
+	  var seen = new Set();
+	  var nodes = new Set();
+	  ids.forEach(collectNodes);
+	  return Array.from(nodes);
+
+	  function collectNodes(id) {
+	    if (seen.has(id)) return;
+	    seen.add(id);
+	    var entity = graph.hasEntity(id);
+	    if (!entity) return;
+
+	    if (entity.type === 'node') {
+	      nodes.add(entity);
+	    } else if (entity.type === 'way') {
+	      entity.nodes.forEach(collectNodes);
+	    } else {
+	      entity.members.map(function (member) {
+	        return member.id;
+	      }).forEach(collectNodes); // recurse
+	    }
+	  }
+	}
+	function utilDisplayName(entity) {
+	  var localizedNameKey = 'name:' + _mainLocalizer.languageCode().toLowerCase();
+	  var name = entity.tags[localizedNameKey] || entity.tags.name || '';
+	  if (name) return name;
+	  var tags = {
+	    direction: entity.tags.direction,
+	    from: entity.tags.from,
+	    network: entity.tags.cycle_network || entity.tags.network,
+	    ref: entity.tags.ref,
+	    to: entity.tags.to,
+	    via: entity.tags.via
+	  };
+	  var keyComponents = [];
 
-	        context.history()
-	            .on('undone.rotate', null);
+	  if (tags.network) {
+	    keyComponents.push('network');
+	  }
 
-	        select(document)
-	            .call(keybinding.unbind);
+	  if (tags.ref) {
+	    keyComponents.push('ref');
+	  } // Routes may need more disambiguation based on direction or destination
 
-	        context.features().forceVisible([]);
-	    };
 
+	  if (entity.tags.route) {
+	    if (tags.direction) {
+	      keyComponents.push('direction');
+	    } else if (tags.from && tags.to) {
+	      keyComponents.push('from');
+	      keyComponents.push('to');
 
-	    mode.selectedIDs = function() {
-	        if (!arguments.length) { return entityIDs; }
-	        // no assign
-	        return mode;
-	    };
+	      if (tags.via) {
+	        keyComponents.push('via');
+	      }
+	    }
+	  }
 
+	  if (keyComponents.length) {
+	    name = _t('inspector.display_name.' + keyComponents.join('_'), tags);
+	  }
 
-	    return mode;
+	  return name;
 	}
+	function utilDisplayNameForPath(entity) {
+	  var name = utilDisplayName(entity);
+	  var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;
+	  var isNewChromium = Number(utilDetect().version.split('.')[0]) >= 96.0;
 
-	function operationRotate(context, selectedIDs) {
-	    var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-	    var nodes = utilGetAllNodes(selectedIDs, context.graph());
-	    var coords = nodes.map(function(n) { return n.loc; });
-	    var extent = utilTotalExtent(selectedIDs, context.graph());
+	  if (!isFirefox && !isNewChromium && name && rtlRegex.test(name)) {
+	    name = fixRTLTextForSvg(name);
+	  }
 
+	  return name;
+	}
+	function utilDisplayType(id) {
+	  return {
+	    n: _t('inspector.node'),
+	    w: _t('inspector.way'),
+	    r: _t('inspector.relation')
+	  }[id.charAt(0)];
+	} // `utilDisplayLabel`
+	// Returns a string suitable for display
+	// By default returns something like name/ref, fallback to preset type, fallback to OSM type
+	//   "Main Street" or "Tertiary Road"
+	// If `verbose=true`, include both preset name and feature name.
+	//   "Tertiary Road Main Street"
+	//
 
-	    var operation = function() {
-	        context.enter(modeRotate(context, selectedIDs));
-	    };
+	function utilDisplayLabel(entity, graphOrGeometry, verbose) {
+	  var result;
+	  var displayName = utilDisplayName(entity);
+	  var preset = typeof graphOrGeometry === 'string' ? _mainPresetIndex.matchTags(entity.tags, graphOrGeometry) : _mainPresetIndex.match(entity, graphOrGeometry);
+	  var presetName = preset && (preset.suggestion ? preset.subtitle() : preset.name());
 
+	  if (verbose) {
+	    result = [presetName, displayName].filter(Boolean).join(' ');
+	  } else {
+	    result = displayName || presetName;
+	  } // Fallback to the OSM type (node/way/relation)
 
-	    operation.available = function() {
-	        return nodes.length >= 2;
-	    };
 
+	  return result || utilDisplayType(entity.id);
+	}
+	function utilEntityRoot(entityType) {
+	  return {
+	    node: 'n',
+	    way: 'w',
+	    relation: 'r'
+	  }[entityType];
+	} // Returns a single object containing the tags of all the given entities.
+	// Example:
+	// {
+	//   highway: 'service',
+	//   service: 'parking_aisle'
+	// }
+	//           +
+	// {
+	//   highway: 'service',
+	//   service: 'driveway',
+	//   width: '3'
+	// }
+	//           =
+	// {
+	//   highway: 'service',
+	//   service: [ 'driveway', 'parking_aisle' ],
+	//   width: [ '3', undefined ]
+	// }
 
-	    operation.disabled = function() {
+	function utilCombinedTags(entityIDs, graph) {
+	  var tags = {};
+	  var tagCounts = {};
+	  var allKeys = new Set();
+	  var entities = entityIDs.map(function (entityID) {
+	    return graph.hasEntity(entityID);
+	  }).filter(Boolean); // gather the aggregate keys
+
+	  entities.forEach(function (entity) {
+	    var keys = Object.keys(entity.tags).filter(Boolean);
+	    keys.forEach(function (key) {
+	      allKeys.add(key);
+	    });
+	  });
+	  entities.forEach(function (entity) {
+	    allKeys.forEach(function (key) {
+	      var value = entity.tags[key]; // purposely allow `undefined`
 
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        } else if (selectedIDs.some(incompleteRelation)) {
-	            return 'incomplete_relation';
+	      if (!tags.hasOwnProperty(key)) {
+	        // first value, set as raw
+	        tags[key] = value;
+	      } else {
+	        if (!Array.isArray(tags[key])) {
+	          if (tags[key] !== value) {
+	            // first alternate value, replace single value with array
+	            tags[key] = [tags[key], value];
+	          }
+	        } else {
+	          // type is array
+	          if (tags[key].indexOf(value) === -1) {
+	            // subsequent alternate value, add to array
+	            tags[key].push(value);
+	          }
 	        }
+	      }
 
-	        return false;
+	      var tagHash = key + '=' + value;
+	      if (!tagCounts[tagHash]) tagCounts[tagHash] = 0;
+	      tagCounts[tagHash] += 1;
+	    });
+	  });
 
+	  for (var key in tags) {
+	    if (!Array.isArray(tags[key])) continue; // sort values by frequency then alphabetically
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
+	    tags[key] = tags[key].sort(function (val1, val2) {
+	      var key = key; // capture
 
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
-	        }
-	    };
+	      var count2 = tagCounts[key + '=' + val2];
+	      var count1 = tagCounts[key + '=' + val1];
 
+	      if (count2 !== count1) {
+	        return count2 - count1;
+	      }
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.rotate.' + disable + '.' + multi) :
-	            _t('operations.rotate.description.' + multi);
-	    };
+	      if (val2 && val1) {
+	        return val1.localeCompare(val2);
+	      }
 
+	      return val1 ? 1 : -1;
+	    });
+	  }
 
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) :
-	            _t('operations.rotate.annotation.multiple');
-	    };
+	  return tags;
+	}
+	function utilStringQs(str) {
+	  var i = 0; // advance past any leading '?' or '#' characters
 
+	  while (i < str.length && (str[i] === '?' || str[i] === '#')) {
+	    i++;
+	  }
 
-	    operation.id = 'rotate';
-	    operation.keys = [_t('operations.rotate.key')];
-	    operation.title = _t('operations.rotate.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	  str = str.slice(i);
+	  return str.split('&').reduce(function (obj, pair) {
+	    var parts = pair.split('=');
 
-	    operation.mouseOnly = true;
+	    if (parts.length === 2) {
+	      obj[parts[0]] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
+	    }
 
-	    return operation;
+	    return obj;
+	  }, {});
 	}
+	function utilQsString(obj, noencode) {
+	  // encode everything except special characters used in certain hash parameters:
+	  // "/" in map states, ":", ",", {" and "}" in background
+	  function softEncode(s) {
+	    return encodeURIComponent(s).replace(/(%2F|%3A|%2C|%7B|%7D)/g, decodeURIComponent);
+	  }
 
-	function modeMove(context, entityIDs, baseGraph) {
-	    var mode = {
-	        id: 'move',
-	        button: 'browse'
-	    };
+	  return Object.keys(obj).sort().map(function (key) {
+	    return encodeURIComponent(key) + '=' + (noencode ? softEncode(obj[key]) : encodeURIComponent(obj[key]));
+	  }).join('&');
+	}
+	function utilPrefixDOMProperty(property) {
+	  var prefixes = ['webkit', 'ms', 'moz', 'o'];
+	  var i = -1;
+	  var n = prefixes.length;
+	  var s = document.body;
+	  if (property in s) return property;
+	  property = property.substr(0, 1).toUpperCase() + property.substr(1);
 
-	    var keybinding = utilKeybinding('move');
-	    var behaviors = [
-	        behaviorEdit(context),
-	        operationCircularize(context, entityIDs).behavior,
-	        operationDelete(context, entityIDs).behavior,
-	        operationOrthogonalize(context, entityIDs).behavior,
-	        operationReflectLong(context, entityIDs).behavior,
-	        operationReflectShort(context, entityIDs).behavior,
-	        operationRotate(context, entityIDs).behavior
-	    ];
-	    var annotation = entityIDs.length === 1 ?
-	        _t('operations.move.annotation.' + context.graph().geometry(entityIDs[0])) :
-	        _t('operations.move.annotation.multiple');
+	  while (++i < n) {
+	    if (prefixes[i] + property in s) {
+	      return prefixes[i] + property;
+	    }
+	  }
 
-	    var _prevGraph;
-	    var _cache;
-	    var _origin;
-	    var _nudgeInterval;
+	  return false;
+	}
+	function utilPrefixCSSProperty(property) {
+	  var prefixes = ['webkit', 'ms', 'Moz', 'O'];
+	  var i = -1;
+	  var n = prefixes.length;
+	  var s = document.body.style;
 
+	  if (property.toLowerCase() in s) {
+	    return property.toLowerCase();
+	  }
 
-	    function doMove(nudge) {
-	        nudge = nudge || [0, 0];
+	  while (++i < n) {
+	    if (prefixes[i] + property in s) {
+	      return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
+	    }
+	  }
 
-	        var fn;
-	        if (_prevGraph !== context.graph()) {
-	            _cache = {};
-	            _origin = context.map().mouseCoordinates();
-	            fn = context.perform;
-	        } else {
-	            fn = context.overwrite;
-	        }
+	  return false;
+	}
+	var transformProperty;
+	function utilSetTransform(el, x, y, scale) {
+	  var prop = transformProperty = transformProperty || utilPrefixCSSProperty('Transform');
+	  var translate = utilDetect().opera ? 'translate(' + x + 'px,' + y + 'px)' : 'translate3d(' + x + 'px,' + y + 'px,0)';
+	  return el.style(prop, translate + (scale ? ' scale(' + scale + ')' : ''));
+	} // Calculates Levenshtein distance between two strings
+	// see:  https://en.wikipedia.org/wiki/Levenshtein_distance
+	// first converts the strings to lowercase and replaces diacritic marks with ascii equivalents.
 
-	        var currMouse = context.map().mouse();
-	        var origMouse = context.projection(_origin);
-	        var delta = geoVecSubtract(geoVecSubtract(currMouse, origMouse), nudge);
+	function utilEditDistance(a, b) {
+	  a = remove$6(a.toLowerCase());
+	  b = remove$6(b.toLowerCase());
+	  if (a.length === 0) return b.length;
+	  if (b.length === 0) return a.length;
+	  var matrix = [];
+	  var i, j;
 
-	        fn(actionMove(entityIDs, delta, context.projection, _cache));
-	        _prevGraph = context.graph();
-	    }
+	  for (i = 0; i <= b.length; i++) {
+	    matrix[i] = [i];
+	  }
 
+	  for (j = 0; j <= a.length; j++) {
+	    matrix[0][j] = j;
+	  }
 
-	    function startNudge(nudge) {
-	        if (_nudgeInterval) { window.clearInterval(_nudgeInterval); }
-	        _nudgeInterval = window.setInterval(function() {
-	            context.map().pan(nudge);
-	            doMove(nudge);
-	        }, 50);
+	  for (i = 1; i <= b.length; i++) {
+	    for (j = 1; j <= a.length; j++) {
+	      if (b.charAt(i - 1) === a.charAt(j - 1)) {
+	        matrix[i][j] = matrix[i - 1][j - 1];
+	      } else {
+	        matrix[i][j] = Math.min(matrix[i - 1][j - 1] + 1, // substitution
+	        Math.min(matrix[i][j - 1] + 1, // insertion
+	        matrix[i - 1][j] + 1)); // deletion
+	      }
 	    }
+	  }
 
+	  return matrix[b.length][a.length];
+	} // a d3.mouse-alike which
+	// 1. Only works on HTML elements, not SVG
+	// 2. Does not cause style recalculation
 
-	    function stopNudge() {
-	        if (_nudgeInterval) {
-	            window.clearInterval(_nudgeInterval);
-	            _nudgeInterval = null;
-	        }
-	    }
+	function utilFastMouse(container) {
+	  var rect = container.getBoundingClientRect();
+	  var rectLeft = rect.left;
+	  var rectTop = rect.top;
+	  var clientLeft = +container.clientLeft;
+	  var clientTop = +container.clientTop;
+	  return function (e) {
+	    return [e.clientX - rectLeft - clientLeft, e.clientY - rectTop - clientTop];
+	  };
+	}
+	function utilAsyncMap(inputs, func, callback) {
+	  var remaining = inputs.length;
+	  var results = [];
+	  var errors = [];
+	  inputs.forEach(function (d, i) {
+	    func(d, function done(err, data) {
+	      errors[i] = err;
+	      results[i] = data;
+	      remaining--;
+	      if (!remaining) callback(errors, results);
+	    });
+	  });
+	} // wraps an index to an interval [0..length-1]
 
+	function utilWrap(index, length) {
+	  if (index < 0) {
+	    index += Math.ceil(-index / length) * length;
+	  }
 
-	    function move() {
-	        doMove();
-	        var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
-	        if (nudge) {
-	            startNudge(nudge);
-	        } else {
-	            stopNudge();
-	        }
-	    }
+	  return index % length;
+	}
+	/**
+	 * a replacement for functor
+	 *
+	 * @param {*} value any value
+	 * @returns {Function} a function that returns that value or the value if it's a function
+	 */
 
+	function utilFunctor(value) {
+	  if (typeof value === 'function') return value;
+	  return function () {
+	    return value;
+	  };
+	}
+	function utilNoAuto(selection) {
+	  var isText = selection.size() && selection.node().tagName.toLowerCase() === 'textarea';
+	  return selection // assign 'new-password' even for non-password fields to prevent browsers (Chrome) ignoring 'off'
+	  .attr('autocomplete', 'new-password').attr('autocorrect', 'off').attr('autocapitalize', 'off').attr('spellcheck', isText ? 'true' : 'false');
+	} // https://stackoverflow.com/questions/194846/is-there-any-kind-of-hash-code-function-in-javascript
+	// https://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
 
-	    function finish() {
-	        event.stopPropagation();
-	        context.replace(actionNoop(), annotation);
-	        context.enter(modeSelect(context, entityIDs));
-	        stopNudge();
-	    }
+	function utilHashcode(str) {
+	  var hash = 0;
 
+	  if (str.length === 0) {
+	    return hash;
+	  }
 
-	    function cancel() {
-	        if (baseGraph) {
-	            while (context.graph() !== baseGraph) { context.pop(); }
-	            context.enter(modeBrowse(context));
-	        } else {
-	            context.pop();
-	            context.enter(modeSelect(context, entityIDs));
-	        }
-	        stopNudge();
-	    }
+	  for (var i = 0; i < str.length; i++) {
+	    var _char = str.charCodeAt(i);
 
+	    hash = (hash << 5) - hash + _char;
+	    hash = hash & hash; // Convert to 32bit integer
+	  }
 
-	    function undone() {
-	        context.enter(modeBrowse(context));
-	    }
+	  return hash;
+	} // Returns version of `str` with all runs of special characters replaced by `_`;
+	// suitable for HTML ids, classes, selectors, etc.
 
+	function utilSafeClassName(str) {
+	  return str.toLowerCase().replace(/[^a-z0-9]+/g, '_');
+	} // Returns string based on `val` that is highly unlikely to collide with an id
+	// used previously or that's present elsewhere in the document. Useful for preventing
+	// browser-provided autofills or when embedding iD on pages with unknown elements.
 
-	    mode.enter = function() {
-	        _origin = context.map().mouseCoordinates();
-	        _prevGraph = null;
-	        _cache = {};
+	function utilUniqueDomId(val) {
+	  return 'ideditor-' + utilSafeClassName(val.toString()) + '-' + new Date().getTime().toString();
+	} // Returns the length of `str` in unicode characters. This can be less than
+	// `String.length()` since a single unicode character can be composed of multiple
+	// JavaScript UTF-16 code units.
 
-	        context.features().forceVisible(entityIDs);
+	function utilUnicodeCharsCount(str) {
+	  // Native ES2015 implementations of `Array.from` split strings into unicode characters
+	  return Array.from(str).length;
+	} // Returns a new string representing `str` cut from its start to `limit` length
+	// in unicode characters. Note that this runs the risk of splitting graphemes.
 
-	        behaviors.forEach(context.install);
+	function utilUnicodeCharsTruncated(str, limit) {
+	  return Array.from(str).slice(0, limit).join('');
+	}
 
-	        context.surface()
-	            .on('mousemove.move', move)
-	            .on('click.move', finish);
+	function toNumericID(id) {
+	  var match = id.match(/^[cnwr](-?\d+)$/);
 
-	        context.history()
-	            .on('undone.move', undone);
+	  if (match) {
+	    return parseInt(match[1], 10);
+	  }
 
-	        keybinding
-	            .on('⎋', cancel)
-	            .on('↩', finish);
+	  return NaN;
+	}
 
-	        select(document)
-	            .call(keybinding);
-	    };
+	function compareNumericIDs(left, right) {
+	  if (isNaN(left) && isNaN(right)) return -1;
+	  if (isNaN(left)) return 1;
+	  if (isNaN(right)) return -1;
+	  if (Math.sign(left) !== Math.sign(right)) return -Math.sign(left);
+	  if (Math.sign(left) < 0) return Math.sign(right - left);
+	  return Math.sign(left - right);
+	} // Returns -1 if the first parameter ID is older than the second,
+	// 1 if the second parameter is older, 0 if they are the same.
+	// If both IDs are test IDs, the function returns -1.
 
 
-	    mode.exit = function() {
-	        stopNudge();
+	function utilCompareIDs(left, right) {
+	  return compareNumericIDs(toNumericID(left), toNumericID(right));
+	} // Returns the chronologically oldest ID in the list.
+	// Database IDs (with positive numbers) before editor ones (with negative numbers).
+	// Among each category, the closest number to 0 is the oldest.
+	// Test IDs (any string that does not conform to OSM's ID scheme) are taken last.
 
-	        behaviors.forEach(function(behavior) {
-	            context.uninstall(behavior);
-	        });
+	function utilOldestID(ids) {
+	  if (ids.length === 0) {
+	    return undefined;
+	  }
 
-	        context.surface()
-	            .on('mousemove.move', null)
-	            .on('click.move', null);
+	  var oldestIDIndex = 0;
+	  var oldestID = toNumericID(ids[0]);
 
-	        context.history()
-	            .on('undone.move', null);
+	  for (var i = 1; i < ids.length; i++) {
+	    var num = toNumericID(ids[i]);
 
-	        select(document)
-	            .call(keybinding.unbind);
+	    if (compareNumericIDs(oldestID, num) === 1) {
+	      oldestIDIndex = i;
+	      oldestID = num;
+	    }
+	  }
 
-	        context.features().forceVisible([]);
-	    };
+	  return ids[oldestIDIndex];
+	}
 
+	function osmEntity(attrs) {
+	  // For prototypal inheritance.
+	  if (this instanceof osmEntity) return; // Create the appropriate subtype.
 
-	    mode.selectedIDs = function() {
-	        if (!arguments.length) { return entityIDs; }
-	        // no assign
-	        return mode;
-	    };
+	  if (attrs && attrs.type) {
+	    return osmEntity[attrs.type].apply(this, arguments);
+	  } else if (attrs && attrs.id) {
+	    return osmEntity[osmEntity.id.type(attrs.id)].apply(this, arguments);
+	  } // Initialize a generic Entity (used only in tests).
 
 
-	    return mode;
+	  return new osmEntity().initialize(arguments);
 	}
 
-	// see also `operationPaste`
-	function behaviorPaste(context) {
+	osmEntity.id = function (type) {
+	  return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
+	};
 
-	    function doPaste() {
-	        // prevent paste during low zoom selection
-	        if (!context.map().withinEditableZoom()) { return; }
+	osmEntity.id.next = {
+	  changeset: -1,
+	  node: -1,
+	  way: -1,
+	  relation: -1
+	};
 
-	        event.preventDefault();
+	osmEntity.id.fromOSM = function (type, id) {
+	  return type[0] + id;
+	};
 
-	        var baseGraph = context.graph();
-	        var mouse = context.map().mouse();
-	        var projection = context.projection;
-	        var viewport = geoExtent(projection.clipExtent()).polygon();
+	osmEntity.id.toOSM = function (id) {
+	  var match = id.match(/^[cnwr](-?\d+)$/);
 
-	        if (!geoPointInPolygon(mouse, viewport)) { return; }
+	  if (match) {
+	    return match[1];
+	  }
 
-	        var oldIDs = context.copyIDs();
-	        if (!oldIDs.length) { return; }
+	  return '';
+	};
 
-	        var extent = geoExtent();
-	        var oldGraph = context.copyGraph();
-	        var newIDs = [];
+	osmEntity.id.type = function (id) {
+	  return {
+	    'c': 'changeset',
+	    'n': 'node',
+	    'w': 'way',
+	    'r': 'relation'
+	  }[id[0]];
+	}; // A function suitable for use as the second argument to d3.selection#data().
 
-	        var action = actionCopyEntities(oldIDs, oldGraph);
-	        context.perform(action);
 
-	        var copies = action.copies();
-	        var originals = new Set();
-	        Object.values(copies).forEach(function(entity) { originals.add(entity.id); });
+	osmEntity.key = function (entity) {
+	  return entity.id + 'v' + (entity.v || 0);
+	};
 
-	        for (var id in copies) {
-	            var oldEntity = oldGraph.entity(id);
-	            var newEntity = copies[id];
+	var _deprecatedTagValuesByKey;
 
-	            extent._extend(oldEntity.extent(oldGraph));
+	osmEntity.deprecatedTagValuesByKey = function (dataDeprecated) {
+	  if (!_deprecatedTagValuesByKey) {
+	    _deprecatedTagValuesByKey = {};
+	    dataDeprecated.forEach(function (d) {
+	      var oldKeys = Object.keys(d.old);
 
-	            // Exclude child nodes from newIDs if their parent way was also copied.
-	            var parents = context.graph().parentWays(newEntity);
-	            var parentCopied = parents.some(function(parent) {
-	                return originals.has(parent.id);
-	            });
+	      if (oldKeys.length === 1) {
+	        var oldKey = oldKeys[0];
+	        var oldValue = d.old[oldKey];
 
-	            if (!parentCopied) {
-	                newIDs.push(newEntity.id);
-	            }
+	        if (oldValue !== '*') {
+	          if (!_deprecatedTagValuesByKey[oldKey]) {
+	            _deprecatedTagValuesByKey[oldKey] = [oldValue];
+	          } else {
+	            _deprecatedTagValuesByKey[oldKey].push(oldValue);
+	          }
 	        }
+	      }
+	    });
+	  }
 
-	        // Put pasted objects where mouse pointer is..
-	        var copyPoint = (context.copyLonLat() && projection(context.copyLonLat())) || projection(extent.center());
-	        var delta = geoVecSubtract(mouse, copyPoint);
+	  return _deprecatedTagValuesByKey;
+	};
 
-	        context.perform(actionMove(newIDs, delta, projection));
-	        context.enter(modeMove(context, newIDs, baseGraph));
+	osmEntity.prototype = {
+	  tags: {},
+	  initialize: function initialize(sources) {
+	    for (var i = 0; i < sources.length; ++i) {
+	      var source = sources[i];
+
+	      for (var prop in source) {
+	        if (Object.prototype.hasOwnProperty.call(source, prop)) {
+	          if (source[prop] === undefined) {
+	            delete this[prop];
+	          } else {
+	            this[prop] = source[prop];
+	          }
+	        }
+	      }
 	    }
 
+	    if (!this.id && this.type) {
+	      this.id = osmEntity.id(this.type);
+	    }
 
-	    function behavior() {
-	        context.keybinding().on(uiCmd('⌘V'), doPaste);
-	        return behavior;
+	    if (!this.hasOwnProperty('visible')) {
+	      this.visible = true;
 	    }
 
+	    if (debug) {
+	      Object.freeze(this);
+	      Object.freeze(this.tags);
+	      if (this.loc) Object.freeze(this.loc);
+	      if (this.nodes) Object.freeze(this.nodes);
+	      if (this.members) Object.freeze(this.members);
+	    }
 
-	    behavior.off = function() {
-	        context.keybinding().off(uiCmd('⌘V'));
-	    };
+	    return this;
+	  },
+	  copy: function copy(resolver, copies) {
+	    if (copies[this.id]) return copies[this.id];
+	    var copy = osmEntity(this, {
+	      id: undefined,
+	      user: undefined,
+	      version: undefined
+	    });
+	    copies[this.id] = copy;
+	    return copy;
+	  },
+	  osmId: function osmId() {
+	    return osmEntity.id.toOSM(this.id);
+	  },
+	  isNew: function isNew() {
+	    var osmId = osmEntity.id.toOSM(this.id);
+	    return osmId.length === 0 || osmId[0] === '-';
+	  },
+	  update: function update(attrs) {
+	    return osmEntity(this, attrs, {
+	      v: 1 + (this.v || 0)
+	    });
+	  },
+	  mergeTags: function mergeTags(tags) {
+	    var merged = Object.assign({}, this.tags); // shallow copy
 
+	    var changed = false;
 
-	    return behavior;
-	}
+	    for (var k in tags) {
+	      var t1 = merged[k];
+	      var t2 = tags[k];
+
+	      if (!t1) {
+	        changed = true;
+	        merged[k] = t2;
+	      } else if (t1 !== t2) {
+	        changed = true;
+	        merged[k] = utilUnicodeCharsTruncated(utilArrayUnion(t1.split(/;\s*/), t2.split(/;\s*/)).join(';'), 255 // avoid exceeding character limit; see also services/osm.js -> maxCharsForTagValue()
+	        );
+	      }
+	    }
 
-	/*
-	    `behaviorDrag` is like `d3_behavior.drag`, with the following differences:
+	    return changed ? this.update({
+	      tags: merged
+	    }) : this;
+	  },
+	  intersects: function intersects(extent, resolver) {
+	    return this.extent(resolver).intersects(extent);
+	  },
+	  hasNonGeometryTags: function hasNonGeometryTags() {
+	    return Object.keys(this.tags).some(function (k) {
+	      return k !== 'area';
+	    });
+	  },
+	  hasParentRelations: function hasParentRelations(resolver) {
+	    return resolver.parentRelations(this).length > 0;
+	  },
+	  hasInterestingTags: function hasInterestingTags() {
+	    return Object.keys(this.tags).some(osmIsInterestingTag);
+	  },
+	  isHighwayIntersection: function isHighwayIntersection() {
+	    return false;
+	  },
+	  isDegenerate: function isDegenerate() {
+	    return true;
+	  },
+	  deprecatedTags: function deprecatedTags(dataDeprecated) {
+	    var tags = this.tags; // if there are no tags, none can be deprecated
+
+	    if (Object.keys(tags).length === 0) return [];
+	    var deprecated = [];
+	    dataDeprecated.forEach(function (d) {
+	      var oldKeys = Object.keys(d.old);
+
+	      if (d.replace) {
+	        var hasExistingValues = Object.keys(d.replace).some(function (replaceKey) {
+	          if (!tags[replaceKey] || d.old[replaceKey]) return false;
+	          var replaceValue = d.replace[replaceKey];
+	          if (replaceValue === '*') return false;
+	          if (replaceValue === tags[replaceKey]) return false;
+	          return true;
+	        }); // don't flag deprecated tags if the upgrade path would overwrite existing data - #7843
 
-	    * The `origin` function is expected to return an [x, y] tuple rather than an
-	      {x, y} object.
-	    * The events are `start`, `move`, and `end`.
-	      (https://github.com/mbostock/d3/issues/563)
-	    * The `start` event is not dispatched until the first cursor movement occurs.
-	      (https://github.com/mbostock/d3/pull/368)
-	    * The `move` event has a `point` and `delta` [x, y] tuple properties rather
-	      than `x`, `y`, `dx`, and `dy` properties.
-	    * The `end` event is not dispatched if no movement occurs.
-	    * An `off` function is available that unbinds the drag's internal event handlers.
-	 */
+	        if (hasExistingValues) return;
+	      }
 
-	function behaviorDrag() {
-	    var dispatch$1 = dispatch('start', 'move', 'end');
-
-	    // see also behaviorSelect
-	    var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
-	    var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
-
-	    var _origin = null;
-	    var _selector = '';
-	    var _event;
-	    var _target;
-	    var _surface;
-	    var _pointerId;
-
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-	    var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
-	    var d3_event_userSelectSuppress = function() {
-	            var selection$1 = selection();
-	            var select = selection$1.style(d3_event_userSelectProperty);
-	            selection$1.style(d3_event_userSelectProperty, 'none');
-	            return function() {
-	                selection$1.style(d3_event_userSelectProperty, select);
-	            };
-	        };
+	      var matchesDeprecatedTags = oldKeys.every(function (oldKey) {
+	        if (!tags[oldKey]) return false;
+	        if (d.old[oldKey] === '*') return true;
+	        if (d.old[oldKey] === tags[oldKey]) return true;
+	        var vals = tags[oldKey].split(';').filter(Boolean);
 
+	        if (vals.length === 0) {
+	          return false;
+	        } else if (vals.length > 1) {
+	          return vals.indexOf(d.old[oldKey]) !== -1;
+	        } else {
+	          if (tags[oldKey] === d.old[oldKey]) {
+	            if (d.replace && d.old[oldKey] === d.replace[oldKey]) {
+	              var replaceKeys = Object.keys(d.replace);
+	              return !replaceKeys.every(function (replaceKey) {
+	                return tags[replaceKey] === d.replace[replaceKey];
+	              });
+	            } else {
+	              return true;
+	            }
+	          }
+	        }
 
-	    function eventOf(thiz, argumentz) {
-	        return function(e1) {
-	            e1.target = behavior;
-	            customEvent(e1, dispatch$1.apply, dispatch$1, [e1.type, thiz, argumentz]);
-	        };
-	    }
+	        return false;
+	      });
 
+	      if (matchesDeprecatedTags) {
+	        deprecated.push(d);
+	      }
+	    });
+	    return deprecated;
+	  }
+	};
 
-	    function pointerdown() {
+	function osmLanes(entity) {
+	  if (entity.type !== 'way') return null;
+	  if (!entity.tags.highway) return null;
+	  var tags = entity.tags;
+	  var isOneWay = entity.isOneWay();
+	  var laneCount = getLaneCount(tags, isOneWay);
+	  var maxspeed = parseMaxspeed(tags);
+	  var laneDirections = parseLaneDirections(tags, isOneWay, laneCount);
+	  var forward = laneDirections.forward;
+	  var backward = laneDirections.backward;
+	  var bothways = laneDirections.bothways; // parse the piped string 'x|y|z' format
+
+	  var turnLanes = {};
+	  turnLanes.unspecified = parseTurnLanes(tags['turn:lanes']);
+	  turnLanes.forward = parseTurnLanes(tags['turn:lanes:forward']);
+	  turnLanes.backward = parseTurnLanes(tags['turn:lanes:backward']);
+	  var maxspeedLanes = {};
+	  maxspeedLanes.unspecified = parseMaxspeedLanes(tags['maxspeed:lanes'], maxspeed);
+	  maxspeedLanes.forward = parseMaxspeedLanes(tags['maxspeed:lanes:forward'], maxspeed);
+	  maxspeedLanes.backward = parseMaxspeedLanes(tags['maxspeed:lanes:backward'], maxspeed);
+	  var psvLanes = {};
+	  psvLanes.unspecified = parseMiscLanes(tags['psv:lanes']);
+	  psvLanes.forward = parseMiscLanes(tags['psv:lanes:forward']);
+	  psvLanes.backward = parseMiscLanes(tags['psv:lanes:backward']);
+	  var busLanes = {};
+	  busLanes.unspecified = parseMiscLanes(tags['bus:lanes']);
+	  busLanes.forward = parseMiscLanes(tags['bus:lanes:forward']);
+	  busLanes.backward = parseMiscLanes(tags['bus:lanes:backward']);
+	  var taxiLanes = {};
+	  taxiLanes.unspecified = parseMiscLanes(tags['taxi:lanes']);
+	  taxiLanes.forward = parseMiscLanes(tags['taxi:lanes:forward']);
+	  taxiLanes.backward = parseMiscLanes(tags['taxi:lanes:backward']);
+	  var hovLanes = {};
+	  hovLanes.unspecified = parseMiscLanes(tags['hov:lanes']);
+	  hovLanes.forward = parseMiscLanes(tags['hov:lanes:forward']);
+	  hovLanes.backward = parseMiscLanes(tags['hov:lanes:backward']);
+	  var hgvLanes = {};
+	  hgvLanes.unspecified = parseMiscLanes(tags['hgv:lanes']);
+	  hgvLanes.forward = parseMiscLanes(tags['hgv:lanes:forward']);
+	  hgvLanes.backward = parseMiscLanes(tags['hgv:lanes:backward']);
+	  var bicyclewayLanes = {};
+	  bicyclewayLanes.unspecified = parseBicycleWay(tags['bicycleway:lanes']);
+	  bicyclewayLanes.forward = parseBicycleWay(tags['bicycleway:lanes:forward']);
+	  bicyclewayLanes.backward = parseBicycleWay(tags['bicycleway:lanes:backward']);
+	  var lanesObj = {
+	    forward: [],
+	    backward: [],
+	    unspecified: []
+	  }; // map forward/backward/unspecified of each lane type to lanesObj
+
+	  mapToLanesObj(lanesObj, turnLanes, 'turnLane');
+	  mapToLanesObj(lanesObj, maxspeedLanes, 'maxspeed');
+	  mapToLanesObj(lanesObj, psvLanes, 'psv');
+	  mapToLanesObj(lanesObj, busLanes, 'bus');
+	  mapToLanesObj(lanesObj, taxiLanes, 'taxi');
+	  mapToLanesObj(lanesObj, hovLanes, 'hov');
+	  mapToLanesObj(lanesObj, hgvLanes, 'hgv');
+	  mapToLanesObj(lanesObj, bicyclewayLanes, 'bicycleway');
+	  return {
+	    metadata: {
+	      count: laneCount,
+	      oneway: isOneWay,
+	      forward: forward,
+	      backward: backward,
+	      bothways: bothways,
+	      turnLanes: turnLanes,
+	      maxspeed: maxspeed,
+	      maxspeedLanes: maxspeedLanes,
+	      psvLanes: psvLanes,
+	      busLanes: busLanes,
+	      taxiLanes: taxiLanes,
+	      hovLanes: hovLanes,
+	      hgvLanes: hgvLanes,
+	      bicyclewayLanes: bicyclewayLanes
+	    },
+	    lanes: lanesObj
+	  };
+	}
 
-	        if (_pointerId) { return; }
+	function getLaneCount(tags, isOneWay) {
+	  var count;
 
-	        _pointerId = event.pointerId || 'mouse';
+	  if (tags.lanes) {
+	    count = parseInt(tags.lanes, 10);
 
-	        _target = this;
-	        _event = eventOf(_target, arguments);
+	    if (count > 0) {
+	      return count;
+	    }
+	  }
 
-	        // only force reflow once per drag
-	        var pointerLocGetter = utilFastMouse(_surface || _target.parentNode);
+	  switch (tags.highway) {
+	    case 'trunk':
+	    case 'motorway':
+	      count = isOneWay ? 2 : 4;
+	      break;
 
-	        var offset;
-	        var startOrigin = pointerLocGetter(event);
-	        var started = false;
-	        var selectEnable = d3_event_userSelectSuppress();
+	    default:
+	      count = isOneWay ? 1 : 2;
+	      break;
+	  }
 
-	        select(window)
-	            .on(_pointerPrefix + 'move.drag', pointermove)
-	            .on(_pointerPrefix + 'up.drag pointercancel.drag', pointerup, true);
+	  return count;
+	}
 
-	        if (_origin) {
-	            offset = _origin.apply(_target, arguments);
-	            offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
-	        } else {
-	            offset = [0, 0];
-	        }
+	function parseMaxspeed(tags) {
+	  var maxspeed = tags.maxspeed;
+	  if (!maxspeed) return;
+	  var maxspeedRegex = /^([0-9][\.0-9]+?)(?:[ ]?(?:km\/h|kmh|kph|mph|knots))?$/;
+	  if (!maxspeedRegex.test(maxspeed)) return;
+	  return parseInt(maxspeed, 10);
+	}
 
-	        event.stopPropagation();
+	function parseLaneDirections(tags, isOneWay, laneCount) {
+	  var forward = parseInt(tags['lanes:forward'], 10);
+	  var backward = parseInt(tags['lanes:backward'], 10);
+	  var bothways = parseInt(tags['lanes:both_ways'], 10) > 0 ? 1 : 0;
 
+	  if (parseInt(tags.oneway, 10) === -1) {
+	    forward = 0;
+	    bothways = 0;
+	    backward = laneCount;
+	  } else if (isOneWay) {
+	    forward = laneCount;
+	    bothways = 0;
+	    backward = 0;
+	  } else if (isNaN(forward) && isNaN(backward)) {
+	    backward = Math.floor((laneCount - bothways) / 2);
+	    forward = laneCount - bothways - backward;
+	  } else if (isNaN(forward)) {
+	    if (backward > laneCount - bothways) {
+	      backward = laneCount - bothways;
+	    }
 
-	        function pointermove() {
-	            if (_pointerId !== (event.pointerId || 'mouse')) { return; }
+	    forward = laneCount - bothways - backward;
+	  } else if (isNaN(backward)) {
+	    if (forward > laneCount - bothways) {
+	      forward = laneCount - bothways;
+	    }
 
-	            var p = pointerLocGetter(event);
+	    backward = laneCount - bothways - forward;
+	  }
 
-	            if (!started) {
-	                var dist = geoVecLength(startOrigin,  p);
-	                var tolerance = event.pointerType === 'pen' ? _penTolerancePx : _tolerancePx;
-	                // don't start until the drag has actually moved somewhat
-	                if (dist < tolerance) { return; }
+	  return {
+	    forward: forward,
+	    backward: backward,
+	    bothways: bothways
+	  };
+	}
 
-	                started = true;
-	                _event({ type: 'start' });
+	function parseTurnLanes(tag) {
+	  if (!tag) return;
+	  var validValues = ['left', 'slight_left', 'sharp_left', 'through', 'right', 'slight_right', 'sharp_right', 'reverse', 'merge_to_left', 'merge_to_right', 'none'];
+	  return tag.split('|').map(function (s) {
+	    if (s === '') s = 'none';
+	    return s.split(';').map(function (d) {
+	      return validValues.indexOf(d) === -1 ? 'unknown' : d;
+	    });
+	  });
+	}
 
-	            // Don't send a `move` event in the same cycle as `start` since dragging
-	            // a midpoint will convert the target to a node.
-	            } else {
+	function parseMaxspeedLanes(tag, maxspeed) {
+	  if (!tag) return;
+	  return tag.split('|').map(function (s) {
+	    if (s === 'none') return s;
+	    var m = parseInt(s, 10);
+	    if (s === '' || m === maxspeed) return null;
+	    return isNaN(m) ? 'unknown' : m;
+	  });
+	}
 
-	                startOrigin = p;
-	                event.stopPropagation();
-	                event.preventDefault();
+	function parseMiscLanes(tag) {
+	  if (!tag) return;
+	  var validValues = ['yes', 'no', 'designated'];
+	  return tag.split('|').map(function (s) {
+	    if (s === '') s = 'no';
+	    return validValues.indexOf(s) === -1 ? 'unknown' : s;
+	  });
+	}
 
-	                var dx = p[0] - startOrigin[0];
-	                var dy = p[1] - startOrigin[1];
-	                _event({
-	                    type: 'move',
-	                    point: [p[0] + offset[0],  p[1] + offset[1]],
-	                    delta: [dx, dy]
-	                });
-	            }
-	        }
+	function parseBicycleWay(tag) {
+	  if (!tag) return;
+	  var validValues = ['yes', 'no', 'designated', 'lane'];
+	  return tag.split('|').map(function (s) {
+	    if (s === '') s = 'no';
+	    return validValues.indexOf(s) === -1 ? 'unknown' : s;
+	  });
+	}
+
+	function mapToLanesObj(lanesObj, data, key) {
+	  if (data.forward) {
+	    data.forward.forEach(function (l, i) {
+	      if (!lanesObj.forward[i]) lanesObj.forward[i] = {};
+	      lanesObj.forward[i][key] = l;
+	    });
+	  }
+
+	  if (data.backward) {
+	    data.backward.forEach(function (l, i) {
+	      if (!lanesObj.backward[i]) lanesObj.backward[i] = {};
+	      lanesObj.backward[i][key] = l;
+	    });
+	  }
 
+	  if (data.unspecified) {
+	    data.unspecified.forEach(function (l, i) {
+	      if (!lanesObj.unspecified[i]) lanesObj.unspecified[i] = {};
+	      lanesObj.unspecified[i][key] = l;
+	    });
+	  }
+	}
 
-	        function pointerup() {
-	            if (_pointerId !== (event.pointerId || 'mouse')) { return; }
+	function osmWay() {
+	  if (!(this instanceof osmWay)) {
+	    return new osmWay().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
+	  }
+	}
+	osmEntity.way = osmWay;
+	osmWay.prototype = Object.create(osmEntity.prototype);
+	Object.assign(osmWay.prototype, {
+	  type: 'way',
+	  nodes: [],
+	  copy: function copy(resolver, copies) {
+	    if (copies[this.id]) return copies[this.id];
+	    var copy = osmEntity.prototype.copy.call(this, resolver, copies);
+	    var nodes = this.nodes.map(function (id) {
+	      return resolver.entity(id).copy(resolver, copies).id;
+	    });
+	    copy = copy.update({
+	      nodes: nodes
+	    });
+	    copies[this.id] = copy;
+	    return copy;
+	  },
+	  extent: function extent(resolver) {
+	    return resolver["transient"](this, 'extent', function () {
+	      var extent = geoExtent();
 
-	            _pointerId = null;
+	      for (var i = 0; i < this.nodes.length; i++) {
+	        var node = resolver.hasEntity(this.nodes[i]);
 
-	            if (started) {
-	                _event({ type: 'end' });
+	        if (node) {
+	          extent._extend(node.extent());
+	        }
+	      }
 
-	                event.preventDefault();
-	            }
+	      return extent;
+	    });
+	  },
+	  first: function first() {
+	    return this.nodes[0];
+	  },
+	  last: function last() {
+	    return this.nodes[this.nodes.length - 1];
+	  },
+	  contains: function contains(node) {
+	    return this.nodes.indexOf(node) >= 0;
+	  },
+	  affix: function affix(node) {
+	    if (this.nodes[0] === node) return 'prefix';
+	    if (this.nodes[this.nodes.length - 1] === node) return 'suffix';
+	  },
+	  layer: function layer() {
+	    // explicit layer tag, clamp between -10, 10..
+	    if (isFinite(this.tags.layer)) {
+	      return Math.max(-10, Math.min(+this.tags.layer, 10));
+	    } // implied layer tag..
+
+
+	    if (this.tags.covered === 'yes') return -1;
+	    if (this.tags.location === 'overground') return 1;
+	    if (this.tags.location === 'underground') return -1;
+	    if (this.tags.location === 'underwater') return -10;
+	    if (this.tags.power === 'line') return 10;
+	    if (this.tags.power === 'minor_line') return 10;
+	    if (this.tags.aerialway) return 10;
+	    if (this.tags.bridge) return 1;
+	    if (this.tags.cutting) return -1;
+	    if (this.tags.tunnel) return -1;
+	    if (this.tags.waterway) return -1;
+	    if (this.tags.man_made === 'pipeline') return -10;
+	    if (this.tags.boundary) return -10;
+	    return 0;
+	  },
+	  // the approximate width of the line based on its tags except its `width` tag
+	  impliedLineWidthMeters: function impliedLineWidthMeters() {
+	    var averageWidths = {
+	      highway: {
+	        // width is for single lane
+	        motorway: 5,
+	        motorway_link: 5,
+	        trunk: 4.5,
+	        trunk_link: 4.5,
+	        primary: 4,
+	        secondary: 4,
+	        tertiary: 4,
+	        primary_link: 4,
+	        secondary_link: 4,
+	        tertiary_link: 4,
+	        unclassified: 4,
+	        road: 4,
+	        living_street: 4,
+	        bus_guideway: 4,
+	        pedestrian: 4,
+	        residential: 3.5,
+	        service: 3.5,
+	        track: 3,
+	        cycleway: 2.5,
+	        bridleway: 2,
+	        corridor: 2,
+	        steps: 2,
+	        path: 1.5,
+	        footway: 1.5
+	      },
+	      railway: {
+	        // width includes ties and rail bed, not just track gauge
+	        rail: 2.5,
+	        light_rail: 2.5,
+	        tram: 2.5,
+	        subway: 2.5,
+	        monorail: 2.5,
+	        funicular: 2.5,
+	        disused: 2.5,
+	        preserved: 2.5,
+	        miniature: 1.5,
+	        narrow_gauge: 1.5
+	      },
+	      waterway: {
+	        river: 50,
+	        canal: 25,
+	        stream: 5,
+	        tidal_channel: 5,
+	        fish_pass: 2.5,
+	        drain: 2.5,
+	        ditch: 1.5
+	      }
+	    };
 
-	            select(window)
-	                .on(_pointerPrefix + 'move.drag', null)
-	                .on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+	    for (var key in averageWidths) {
+	      if (this.tags[key] && averageWidths[key][this.tags[key]]) {
+	        var width = averageWidths[key][this.tags[key]];
 
-	            selectEnable();
+	        if (key === 'highway') {
+	          var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
+	          if (!laneCount) laneCount = this.isOneWay() ? 1 : 2;
+	          return width * laneCount;
 	        }
+
+	        return width;
+	      }
 	    }
 
+	    return null;
+	  },
+	  isOneWay: function isOneWay() {
+	    // explicit oneway tag..
+	    var values = {
+	      'yes': true,
+	      '1': true,
+	      '-1': true,
+	      'reversible': true,
+	      'alternating': true,
+	      'no': false,
+	      '0': false
+	    };
 
-	    function behavior(selection) {
-	        _pointerId = null;
-	        var matchesSelector = utilPrefixDOMProperty('matchesSelector');
-	        var delegate = pointerdown;
+	    if (values[this.tags.oneway] !== undefined) {
+	      return values[this.tags.oneway];
+	    } // implied oneway tag..
 
-	        if (_selector) {
-	            delegate = function() {
-	                var root = this;
-	                var target = event.target;
-	                for (; target && target !== root; target = target.parentNode) {
-	                    var datum = target.__data__;
 
-	                    var entity = datum instanceof osmNote ? datum
-	                        : datum && datum.properties && datum.properties.entity;
+	    for (var key in this.tags) {
+	      if (key in osmOneWayTags && this.tags[key] in osmOneWayTags[key]) {
+	        return true;
+	      }
+	    }
 
-	                    if (entity && target[matchesSelector](_selector)) {
-	                        return pointerdown.call(target, entity);
-	                    }
-	                }
-	            };
+	    return false;
+	  },
+	  // Some identifier for tag that implies that this way is "sided",
+	  // i.e. the right side is the 'inside' (e.g. the right side of a
+	  // natural=cliff is lower).
+	  sidednessIdentifier: function sidednessIdentifier() {
+	    for (var key in this.tags) {
+	      var value = this.tags[key];
+
+	      if (key in osmRightSideIsInsideTags && value in osmRightSideIsInsideTags[key]) {
+	        if (osmRightSideIsInsideTags[key][value] === true) {
+	          return key;
+	        } else {
+	          // if the map's value is something other than a
+	          // literal true, we should use it so we can
+	          // special case some keys (e.g. natural=coastline
+	          // is handled differently to other naturals).
+	          return osmRightSideIsInsideTags[key][value];
 	        }
+	      }
+	    }
 
-	        selection
-	            .on(_pointerPrefix + 'down.drag' + _selector, delegate);
+	    return null;
+	  },
+	  isSided: function isSided() {
+	    if (this.tags.two_sided === 'yes') {
+	      return false;
 	    }
 
+	    return this.sidednessIdentifier() !== null;
+	  },
+	  lanes: function lanes() {
+	    return osmLanes(this);
+	  },
+	  isClosed: function isClosed() {
+	    return this.nodes.length > 1 && this.first() === this.last();
+	  },
+	  isConvex: function isConvex(resolver) {
+	    if (!this.isClosed() || this.isDegenerate()) return null;
+	    var nodes = utilArrayUniq(resolver.childNodes(this));
+	    var coords = nodes.map(function (n) {
+	      return n.loc;
+	    });
+	    var curr = 0;
+	    var prev = 0;
 
-	    behavior.off = function(selection) {
-	        selection
-	            .on(_pointerPrefix + 'down.drag' + _selector, null);
-	    };
+	    for (var i = 0; i < coords.length; i++) {
+	      var o = coords[(i + 1) % coords.length];
+	      var a = coords[i];
+	      var b = coords[(i + 2) % coords.length];
+	      var res = geoVecCross(a, b, o);
+	      curr = res > 0 ? 1 : res < 0 ? -1 : 0;
 
+	      if (curr === 0) {
+	        continue;
+	      } else if (prev && curr !== prev) {
+	        return false;
+	      }
 
-	    behavior.selector = function(_) {
-	        if (!arguments.length) { return _selector; }
-	        _selector = _;
-	        return behavior;
-	    };
+	      prev = curr;
+	    }
 
+	    return true;
+	  },
+	  // returns an object with the tag that implies this is an area, if any
+	  tagSuggestingArea: function tagSuggestingArea() {
+	    return osmTagSuggestingArea(this.tags);
+	  },
+	  isArea: function isArea() {
+	    if (this.tags.area === 'yes') return true;
+	    if (!this.isClosed() || this.tags.area === 'no') return false;
+	    return this.tagSuggestingArea() !== null;
+	  },
+	  isDegenerate: function isDegenerate() {
+	    return new Set(this.nodes).size < (this.isArea() ? 3 : 2);
+	  },
+	  areAdjacent: function areAdjacent(n1, n2) {
+	    for (var i = 0; i < this.nodes.length; i++) {
+	      if (this.nodes[i] === n1) {
+	        if (this.nodes[i - 1] === n2) return true;
+	        if (this.nodes[i + 1] === n2) return true;
+	      }
+	    }
 
-	    behavior.origin = function(_) {
-	        if (!arguments.length) { return _origin; }
-	        _origin = _;
-	        return behavior;
-	    };
+	    return false;
+	  },
+	  geometry: function geometry(graph) {
+	    return graph["transient"](this, 'geometry', function () {
+	      return this.isArea() ? 'area' : 'line';
+	    });
+	  },
+	  // returns an array of objects representing the segments between the nodes in this way
+	  segments: function segments(graph) {
+	    function segmentExtent(graph) {
+	      var n1 = graph.hasEntity(this.nodes[0]);
+	      var n2 = graph.hasEntity(this.nodes[1]);
+	      return n1 && n2 && geoExtent([[Math.min(n1.loc[0], n2.loc[0]), Math.min(n1.loc[1], n2.loc[1])], [Math.max(n1.loc[0], n2.loc[0]), Math.max(n1.loc[1], n2.loc[1])]]);
+	    }
+
+	    return graph["transient"](this, 'segments', function () {
+	      var segments = [];
+
+	      for (var i = 0; i < this.nodes.length - 1; i++) {
+	        segments.push({
+	          id: this.id + '-' + i,
+	          wayId: this.id,
+	          index: i,
+	          nodes: [this.nodes[i], this.nodes[i + 1]],
+	          extent: segmentExtent
+	        });
+	      }
 
+	      return segments;
+	    });
+	  },
+	  // If this way is not closed, append the beginning node to the end of the nodelist to close it.
+	  close: function close() {
+	    if (this.isClosed() || !this.nodes.length) return this;
+	    var nodes = this.nodes.slice();
+	    nodes = nodes.filter(noRepeatNodes);
+	    nodes.push(nodes[0]);
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  // If this way is closed, remove any connector nodes from the end of the nodelist to unclose it.
+	  unclose: function unclose() {
+	    if (!this.isClosed()) return this;
+	    var nodes = this.nodes.slice();
+	    var connector = this.first();
+	    var i = nodes.length - 1; // remove trailing connectors..
 
-	    behavior.cancel = function() {
-	        select(window)
-	            .on(_pointerPrefix + 'move.drag', null)
-	            .on(_pointerPrefix + 'up.drag pointercancel.drag', null);
-	        return behavior;
-	    };
+	    while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+	      nodes.splice(i, 1);
+	      i = nodes.length - 1;
+	    }
 
+	    nodes = nodes.filter(noRepeatNodes);
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  // Adds a node (id) in front of the node which is currently at position index.
+	  // If index is undefined, the node will be added to the end of the way for linear ways,
+	  //   or just before the final connecting node for circular ways.
+	  // Consecutive duplicates are eliminated including existing ones.
+	  // Circularity is always preserved when adding a node.
+	  addNode: function addNode(id, index) {
+	    var nodes = this.nodes.slice();
+	    var isClosed = this.isClosed();
+	    var max = isClosed ? nodes.length - 1 : nodes.length;
 
-	    behavior.target = function() {
-	        if (!arguments.length) { return _target; }
-	        _target = arguments[0];
-	        _event = eventOf(_target, Array.prototype.slice.call(arguments, 1));
-	        return behavior;
-	    };
+	    if (index === undefined) {
+	      index = max;
+	    }
 
+	    if (index < 0 || index > max) {
+	      throw new RangeError('index ' + index + ' out of range 0..' + max);
+	    } // If this is a closed way, remove all connector nodes except the first one
+	    // (there may be duplicates) and adjust index if necessary..
 
-	    behavior.surface = function() {
-	        if (!arguments.length) { return _surface; }
-	        _surface = arguments[0];
-	        return behavior;
-	    };
 
+	    if (isClosed) {
+	      var connector = this.first(); // leading connectors..
 
-	    return utilRebind(behavior, dispatch$1, 'on');
-	}
+	      var i = 1;
 
-	function modeDragNode(context) {
-	    var mode = {
-	        id: 'drag-node',
-	        button: 'browse'
-	    };
-	    var hover = behaviorHover(context).altDisables(true)
-	        .on('hover', context.ui().sidebar.hover);
-	    var edit = behaviorEdit(context);
+	      while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index > i) index--;
+	      } // trailing connectors..
 
-	    var _nudgeInterval;
-	    var _restoreSelectedIDs = [];
-	    var _wasMidpoint = false;
-	    var _isCancelled = false;
-	    var _activeEntity;
-	    var _startLoc;
-	    var _lastLoc;
 
+	      i = nodes.length - 1;
 
-	    function startNudge(entity, nudge) {
-	        if (_nudgeInterval) { window.clearInterval(_nudgeInterval); }
-	        _nudgeInterval = window.setInterval(function() {
-	            context.map().pan(nudge);
-	            doMove(entity, nudge);
-	        }, 50);
+	      while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index > i) index--;
+	        i = nodes.length - 1;
+	      }
 	    }
 
+	    nodes.splice(index, 0, id);
+	    nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-	    function stopNudge() {
-	        if (_nudgeInterval) {
-	            window.clearInterval(_nudgeInterval);
-	            _nudgeInterval = null;
-	        }
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
 	    }
 
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  // Replaces the node which is currently at position index with the given node (id).
+	  // Consecutive duplicates are eliminated including existing ones.
+	  // Circularity is preserved when updating a node.
+	  updateNode: function updateNode(id, index) {
+	    var nodes = this.nodes.slice();
+	    var isClosed = this.isClosed();
+	    var max = nodes.length - 1;
 
-	    function moveAnnotation(entity) {
-	        return _t('operations.move.annotation.' + entity.geometry(context.graph()));
-	    }
+	    if (index === undefined || index < 0 || index > max) {
+	      throw new RangeError('index ' + index + ' out of range 0..' + max);
+	    } // If this is a closed way, remove all connector nodes except the first one
+	    // (there may be duplicates) and adjust index if necessary..
 
 
-	    function connectAnnotation(nodeEntity, targetEntity) {
-	        var nodeGeometry = nodeEntity.geometry(context.graph());
-	        var targetGeometry = targetEntity.geometry(context.graph());
-	        if (nodeGeometry === 'vertex' && targetGeometry === 'vertex') {
-	            var nodeParentWayIDs = context.graph().parentWays(nodeEntity);
-	            var targetParentWayIDs = context.graph().parentWays(targetEntity);
-	            var sharedParentWays = utilArrayIntersection(nodeParentWayIDs, targetParentWayIDs);
-	            // if both vertices are part of the same way
-	            if (sharedParentWays.length !== 0) {
-	                // if the nodes are next to each other, they are merged
-	                if (sharedParentWays[0].areAdjacent(nodeEntity.id, targetEntity.id)) {
-	                    return _t('operations.connect.annotation.from_vertex.to_adjacent_vertex');
-	                }
-	                return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
-	            }
-	        }
-	        return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
-	    }
+	    if (isClosed) {
+	      var connector = this.first(); // leading connectors..
 
+	      var i = 1;
 
-	    function shouldSnapToNode(target) {
-	        if (!_activeEntity) { return false; }
-	        return _activeEntity.geometry(context.graph()) !== 'vertex' ||
-	            (target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph()));
-	    }
+	      while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index > i) index--;
+	      } // trailing connectors..
 
 
-	    function origin(entity) {
-	        return context.projection(entity.loc);
-	    }
+	      i = nodes.length - 1;
 
+	      while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index === i) index = 0; // update leading connector instead
 
-	    function keydown() {
-	        if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            if (context.surface().classed('nope')) {
-	                context.surface()
-	                    .classed('nope-suppressed', true);
-	            }
-	            context.surface()
-	                .classed('nope', false)
-	                .classed('nope-disabled', true);
-	        }
+	        i = nodes.length - 1;
+	      }
 	    }
 
+	    nodes.splice(index, 1, id);
+	    nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-	    function keyup() {
-	        if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            if (context.surface().classed('nope-suppressed')) {
-	                context.surface()
-	                    .classed('nope', true);
-	            }
-	            context.surface()
-	                .classed('nope-suppressed', false)
-	                .classed('nope-disabled', false);
-	        }
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
 	    }
 
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  // Replaces each occurrence of node id needle with replacement.
+	  // Consecutive duplicates are eliminated including existing ones.
+	  // Circularity is preserved.
+	  replaceNode: function replaceNode(needleID, replacementID) {
+	    var nodes = this.nodes.slice();
+	    var isClosed = this.isClosed();
+
+	    for (var i = 0; i < nodes.length; i++) {
+	      if (nodes[i] === needleID) {
+	        nodes[i] = replacementID;
+	      }
+	    }
 
-	    function start(entity) {
-	        _wasMidpoint = entity.type === 'midpoint';
-	        var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
-	        _isCancelled = !context.editable() || event.sourceEvent.shiftKey || hasHidden;
+	    nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
 
-	        if (_isCancelled) {
-	            if (hasHidden) {
-	                context.ui().flash
-	                    .duration(4000)
-	                    .text(_t('modes.drag_node.connected_to_hidden'))();
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  // Removes each occurrence of node id.
+	  // Consecutive duplicates are eliminated including existing ones.
+	  // Circularity is preserved.
+	  removeNode: function removeNode(id) {
+	    var nodes = this.nodes.slice();
+	    var isClosed = this.isClosed();
+	    nodes = nodes.filter(function (node) {
+	      return node !== id;
+	    }).filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
+
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
+
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  asJXON: function asJXON(changeset_id) {
+	    var r = {
+	      way: {
+	        '@id': this.osmId(),
+	        '@version': this.version || 0,
+	        nd: this.nodes.map(function (id) {
+	          return {
+	            keyAttributes: {
+	              ref: osmEntity.id.toOSM(id)
 	            }
-	            return drag.cancel();
-	        }
-
-	        if (_wasMidpoint) {
-	            var midpoint = entity;
-	            entity = osmNode();
-	            context.perform(actionAddMidpoint(midpoint, entity));
-	            entity = context.entity(entity.id);   // get post-action entity
-
-	            var vertex = context.surface().selectAll('.' + entity.id);
-	            drag.target(vertex.node(), entity);
+	          };
+	        }, this),
+	        tag: Object.keys(this.tags).map(function (k) {
+	          return {
+	            keyAttributes: {
+	              k: k,
+	              v: this.tags[k]
+	            }
+	          };
+	        }, this)
+	      }
+	    };
 
-	        } else {
-	            context.perform(actionNoop());
-	        }
+	    if (changeset_id) {
+	      r.way['@changeset'] = changeset_id;
+	    }
 
-	        _activeEntity = entity;
-	        _startLoc = entity.loc;
+	    return r;
+	  },
+	  asGeoJSON: function asGeoJSON(resolver) {
+	    return resolver["transient"](this, 'GeoJSON', function () {
+	      var coordinates = resolver.childNodes(this).map(function (n) {
+	        return n.loc;
+	      });
 
-	        hover.ignoreVertex(entity.geometry(context.graph()) === 'vertex');
+	      if (this.isArea() && this.isClosed()) {
+	        return {
+	          type: 'Polygon',
+	          coordinates: [coordinates]
+	        };
+	      } else {
+	        return {
+	          type: 'LineString',
+	          coordinates: coordinates
+	        };
+	      }
+	    });
+	  },
+	  area: function area(resolver) {
+	    return resolver["transient"](this, 'area', function () {
+	      var nodes = resolver.childNodes(this);
+	      var json = {
+	        type: 'Polygon',
+	        coordinates: [nodes.map(function (n) {
+	          return n.loc;
+	        })]
+	      };
 
-	        context.surface().selectAll('.' + _activeEntity.id)
-	            .classed('active', true);
+	      if (!this.isClosed() && nodes.length) {
+	        json.coordinates[0].push(nodes[0].loc);
+	      }
 
-	        context.enter(mode);
-	    }
+	      var area = d3_geoArea(json); // Heuristic for detecting counterclockwise winding order. Assumes
+	      // that OpenStreetMap polygons are not hemisphere-spanning.
 
+	      if (area > 2 * Math.PI) {
+	        json.coordinates[0] = json.coordinates[0].reverse();
+	        area = d3_geoArea(json);
+	      }
 
-	    // related code
-	    // - `behavior/draw.js` `datum()`
-	    function datum() {
-	        var event$1 = event && event.sourceEvent;
-	        if (!event$1 || event$1.altKey) {
-	            return {};
-	        } else {
-	            // When dragging, snap only to touch targets..
-	            // (this excludes area fills and active drawing elements)
-	            var d = event$1.target.__data__;
-	            return (d && d.properties && d.properties.target) ? d : {};
-	        }
-	    }
+	      return isNaN(area) ? 0 : area;
+	    });
+	  }
+	}); // Filter function to eliminate consecutive duplicates.
 
+	function noRepeatNodes(node, i, arr) {
+	  return i === 0 || node !== arr[i - 1];
+	}
 
-	    function doMove(entity, nudge) {
-	        nudge = nudge || [0, 0];
+	//
+	// 1. Relation tagged with `type=multipolygon` and no interesting tags.
+	// 2. One and only one member with the `outer` role. Must be a way with interesting tags.
+	// 3. No members without a role.
+	//
+	// Old multipolygons are no longer recommended but are still rendered as areas by iD.
 
-	        var currPoint = (event && event.point) || context.projection(_lastLoc);
-	        var currMouse = geoVecSubtract(currPoint, nudge);
-	        var loc = context.projection.invert(currMouse);
+	function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
+	  if (entity.type !== 'relation' || !entity.isMultipolygon() || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
+	    return false;
+	  }
 
-	        if (!_nudgeInterval) {   // If not nudging at the edge of the viewport, try to snap..
-	            // related code
-	            // - `mode/drag_node.js`     `doMove()`
-	            // - `behavior/draw.js`      `click()`
-	            // - `behavior/draw_way.js`  `move()`
-	            var d = datum();
-	            var target = d && d.properties && d.properties.entity;
-	            var targetLoc = target && target.loc;
-	            var targetNodes = d && d.properties && d.properties.nodes;
-	            var edge;
+	  var outerMember;
 
-	            if (targetLoc) {   // snap to node/vertex - a point target with `.loc`
-	                if (shouldSnapToNode(target)) {
-	                    loc = targetLoc;
-	                }
+	  for (var memberIndex in entity.members) {
+	    var member = entity.members[memberIndex];
 
-	            } else if (targetNodes) {   // snap to way - a line target with `.nodes`
-	                edge = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, end.id);
-	                if (edge) {
-	                    loc = edge.loc;
-	                }
-	            }
-	        }
+	    if (!member.role || member.role === 'outer') {
+	      if (outerMember) return false;
+	      if (member.type !== 'way') return false;
+	      if (!graph.hasEntity(member.id)) return false;
+	      outerMember = graph.entity(member.id);
 
-	        context.replace(
-	            actionMoveNode(entity.id, loc)
-	        );
+	      if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
+	        return false;
+	      }
+	    }
+	  }
 
-	        // Below here: validations
-	        var isInvalid = false;
+	  return outerMember;
+	} // For fixing up rendering of multipolygons with tags on the outer member.
+	// https://github.com/openstreetmap/iD/issues/613
 
-	        // Check if this connection to `target` could cause relations to break..
-	        if (target) {
-	            isInvalid = hasRelationConflict(entity, target, edge, context.graph());
-	        }
+	function osmIsOldMultipolygonOuterMember(entity, graph) {
+	  if (entity.type !== 'way' || Object.keys(entity.tags).filter(osmIsInterestingTag).length === 0) {
+	    return false;
+	  }
 
-	        // Check if this drag causes the geometry to break..
-	        if (!isInvalid) {
-	            isInvalid = hasInvalidGeometry(entity, context.graph());
-	        }
+	  var parents = graph.parentRelations(entity);
+	  if (parents.length !== 1) return false;
+	  var parent = parents[0];
 
+	  if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) {
+	    return false;
+	  }
 
-	        var nope = context.surface().classed('nope');
-	        if (isInvalid === 'relation' || isInvalid === 'restriction') {
-	            if (!nope) {   // about to nope - show hint
-	                context.ui().flash
-	                    .duration(4000)
-	                    .text(_t('operations.connect.' + isInvalid,
-	                        { relation: _mainPresetIndex.item('type/restriction').name() }
-	                    ))();
-	            }
-	        } else if (isInvalid) {
-	            var errorID = isInvalid === 'line' ? 'lines' : 'areas';
-	            context.ui().flash
-	                .duration(3000)
-	                .text(_t('self_intersection.error.' + errorID))();
-	        } else {
-	            if (nope) {   // about to un-nope, remove hint
-	                context.ui().flash
-	                    .duration(1)
-	                    .text('')();
-	            }
-	        }
+	  var members = parent.members,
+	      member;
 
+	  for (var i = 0; i < members.length; i++) {
+	    member = members[i];
 
-	        var nopeDisabled = context.surface().classed('nope-disabled');
-	        if (nopeDisabled) {
-	            context.surface()
-	                .classed('nope', false)
-	                .classed('nope-suppressed', isInvalid);
-	        } else {
-	            context.surface()
-	                .classed('nope', isInvalid)
-	                .classed('nope-suppressed', false);
-	        }
+	    if (member.id === entity.id && member.role && member.role !== 'outer') {
+	      // Not outer member
+	      return false;
+	    }
 
-	        _lastLoc = loc;
+	    if (member.id !== entity.id && (!member.role || member.role === 'outer')) {
+	      // Not a simple multipolygon
+	      return false;
 	    }
+	  }
 
+	  return parent;
+	}
+	function osmOldMultipolygonOuterMember(entity, graph) {
+	  if (entity.type !== 'way') return false;
+	  var parents = graph.parentRelations(entity);
+	  if (parents.length !== 1) return false;
+	  var parent = parents[0];
+
+	  if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) {
+	    return false;
+	  }
 
-	    // Uses `actionConnect.disabled()` to know whether this connection is ok..
-	    function hasRelationConflict(entity, target, edge, graph) {
-	        var testGraph = graph.update();  // copy
+	  var members = parent.members,
+	      member,
+	      outerMember;
 
-	        // if snapping to way - add midpoint there and consider that the target..
-	        if (edge) {
-	            var midpoint = osmNode();
-	            var action = actionAddMidpoint({
-	                loc: edge.loc,
-	                edge: [target.nodes[edge.index - 1], target.nodes[edge.index]]
-	            }, midpoint);
+	  for (var i = 0; i < members.length; i++) {
+	    member = members[i];
 
-	            testGraph = action(testGraph);
-	            target = midpoint;
-	        }
+	    if (!member.role || member.role === 'outer') {
+	      if (outerMember) return false; // Not a simple multipolygon
 
-	        // can we connect to it?
-	        var ids = [entity.id, target.id];
-	        return actionConnect(ids).disabled(testGraph);
+	      outerMember = member;
 	    }
+	  }
 
+	  if (!outerMember) return false;
+	  var outerEntity = graph.hasEntity(outerMember.id);
 
-	    function hasInvalidGeometry(entity, graph) {
-	        var parents = graph.parentWays(entity);
-	        var i, j, k;
+	  if (!outerEntity || !Object.keys(outerEntity.tags).filter(osmIsInterestingTag).length) {
+	    return false;
+	  }
 
-	        for (i = 0; i < parents.length; i++) {
-	            var parent = parents[i];
-	            var nodes = [];
-	            var activeIndex = null;    // which multipolygon ring contains node being dragged
-
-	            // test any parent multipolygons for valid geometry
-	            var relations = graph.parentRelations(parent);
-	            for (j = 0; j < relations.length; j++) {
-	                if (!relations[j].isMultipolygon()) { continue; }
-
-	                var rings = osmJoinWays(relations[j].members, graph);
-
-	                // find active ring and test it for self intersections
-	                for (k = 0; k < rings.length; k++) {
-	                    nodes = rings[k].nodes;
-	                    if (nodes.find(function(n) { return n.id === entity.id; })) {
-	                        activeIndex = k;
-	                        if (geoHasSelfIntersections(nodes, entity.id)) {
-	                            return 'multipolygonMember';
-	                        }
-	                    }
-	                    rings[k].coords = nodes.map(function(n) { return n.loc; });
-	                }
+	  return outerEntity;
+	} // Join `toJoin` array into sequences of connecting ways.
+	// Segments which share identical start/end nodes will, as much as possible,
+	// be connected with each other.
+	//
+	// The return value is a nested array. Each constituent array contains elements
+	// of `toJoin` which have been determined to connect.
+	//
+	// Each consitituent array also has a `nodes` property whose value is an
+	// ordered array of member nodes, with appropriate order reversal and
+	// start/end coordinate de-duplication.
+	//
+	// Members of `toJoin` must have, at minimum, `type` and `id` properties.
+	// Thus either an array of `osmWay`s or a relation member array may be used.
+	//
+	// If an member is an `osmWay`, its tags and childnodes may be reversed via
+	// `actionReverse` in the output.
+	//
+	// The returned sequences array also has an `actions` array property, containing
+	// any reversal actions that should be applied to the graph, should the calling
+	// code attempt to actually join the given ways.
+	//
+	// Incomplete members (those for which `graph.hasEntity(element.id)` returns
+	// false) and non-way members are ignored.
+	//
 
-	                // test active ring for intersections with other rings in the multipolygon
-	                for (k = 0; k < rings.length; k++) {
-	                    if (k === activeIndex) { continue; }
+	function osmJoinWays(toJoin, graph) {
+	  function resolve(member) {
+	    return graph.childNodes(graph.entity(member.id));
+	  }
 
-	                    // make sure active ring doesnt cross passive rings
-	                    if (geoHasLineIntersections(rings[activeIndex].nodes, rings[k].nodes, entity.id)) {
-	                        return 'multipolygonRing';
-	                    }
-	                }
-	            }
+	  function reverse(item) {
+	    var action = actionReverse(item.id, {
+	      reverseOneway: true
+	    });
+	    sequences.actions.push(action);
+	    return item instanceof osmWay ? action(graph).entity(item.id) : item;
+	  } // make a copy containing only the items to join
 
 
-	            // If we still haven't tested this node's parent way for self-intersections.
-	            // (because it's not a member of a multipolygon), test it now.
-	            if (activeIndex === null) {
-	                nodes = parent.nodes.map(function(nodeID) { return graph.entity(nodeID); });
-	                if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
-	                    return parent.geometry(graph);
-	                }
-	            }
+	  toJoin = toJoin.filter(function (member) {
+	    return member.type === 'way' && graph.hasEntity(member.id);
+	  }); // Are the things we are joining relation members or `osmWays`?
+	  // If `osmWays`, skip the "prefer a forward path" code below (see #4872)
 
-	        }
+	  var i;
+	  var joinAsMembers = true;
 
-	        return false;
+	  for (i = 0; i < toJoin.length; i++) {
+	    if (toJoin[i] instanceof osmWay) {
+	      joinAsMembers = false;
+	      break;
 	    }
+	  }
+
+	  var sequences = [];
+	  sequences.actions = [];
 
+	  while (toJoin.length) {
+	    // start a new sequence
+	    var item = toJoin.shift();
+	    var currWays = [item];
+	    var currNodes = resolve(item).slice(); // add to it
 
-	    function move(entity) {
-	        if (_isCancelled) { return; }
-	        event.sourceEvent.stopPropagation();
+	    while (toJoin.length) {
+	      var start = currNodes[0];
+	      var end = currNodes[currNodes.length - 1];
+	      var fn = null;
+	      var nodes = null; // Find the next way/member to join.
+
+	      for (i = 0; i < toJoin.length; i++) {
+	        item = toJoin[i];
+	        nodes = resolve(item); // (for member ordering only, not way ordering - see #4872)
+	        // Strongly prefer to generate a forward path that preserves the order
+	        // of the members array. For multipolygons and most relations, member
+	        // order does not matter - but for routes, it does. (see #4589)
+	        // If we started this sequence backwards (i.e. next member way attaches to
+	        // the start node and not the end node), reverse the initial way before continuing.
+
+	        if (joinAsMembers && currWays.length === 1 && nodes[0] !== end && nodes[nodes.length - 1] !== end && (nodes[nodes.length - 1] === start || nodes[0] === start)) {
+	          currWays[0] = reverse(currWays[0]);
+	          currNodes.reverse();
+	          start = currNodes[0];
+	          end = currNodes[currNodes.length - 1];
+	        }
+
+	        if (nodes[0] === end) {
+	          fn = currNodes.push; // join to end
+
+	          nodes = nodes.slice(1);
+	          break;
+	        } else if (nodes[nodes.length - 1] === end) {
+	          fn = currNodes.push; // join to end
 
-	        context.surface().classed('nope-disabled', event.sourceEvent.altKey);
+	          nodes = nodes.slice(0, -1).reverse();
+	          item = reverse(item);
+	          break;
+	        } else if (nodes[nodes.length - 1] === start) {
+	          fn = currNodes.unshift; // join to beginning
 
-	        _lastLoc = context.projection.invert(event.point);
+	          nodes = nodes.slice(0, -1);
+	          break;
+	        } else if (nodes[0] === start) {
+	          fn = currNodes.unshift; // join to beginning
 
-	        doMove(entity);
-	        var nudge = geoViewportEdge(event.point, context.map().dimensions());
-	        if (nudge) {
-	            startNudge(entity, nudge);
+	          nodes = nodes.slice(1).reverse();
+	          item = reverse(item);
+	          break;
 	        } else {
-	            stopNudge();
+	          fn = nodes = null;
 	        }
-	    }
+	      }
 
-	    function end(entity) {
-	        if (_isCancelled) { return; }
+	      if (!nodes) {
+	        // couldn't find a joinable way/member
+	        break;
+	      }
 
-	        var wasPoint = entity.geometry(context.graph()) === 'point';
+	      fn.apply(currWays, [item]);
+	      fn.apply(currNodes, nodes);
+	      toJoin.splice(i, 1);
+	    }
 
-	        var d = datum();
-	        var nope = (d && d.properties && d.properties.nope) || context.surface().classed('nope');
-	        var target = d && d.properties && d.properties.entity;   // entity to snap to
+	    currWays.nodes = currNodes;
+	    sequences.push(currWays);
+	  }
 
-	        if (nope) {   // bounce back
-	            context.perform(
-	                _actionBounceBack(entity.id, _startLoc)
-	            );
+	  return sequences;
+	}
 
-	        } else if (target && target.type === 'way') {
-	            var choice = geoChooseEdge(context.graph().childNodes(target), context.map().mouse(), context.projection, entity.id);
-	            context.replace(
-	                actionAddMidpoint({
-	                    loc: choice.loc,
-	                    edge: [target.nodes[choice.index - 1], target.nodes[choice.index]]
-	                }, entity),
-	                connectAnnotation(entity, target)
-	            );
+	function actionAddMember(relationId, member, memberIndex, insertPair) {
+	  return function action(graph) {
+	    var relation = graph.entity(relationId); // There are some special rules for Public Transport v2 routes.
 
-	        } else if (target && target.type === 'node' && shouldSnapToNode(target)) {
-	            context.replace(
-	                actionConnect([target.id, entity.id]),
-	                connectAnnotation(entity, target)
-	            );
+	    var isPTv2 = /stop|platform/.test(member.role);
 
-	        } else if (_wasMidpoint) {
-	            context.replace(
-	                actionNoop(),
-	                _t('operations.add.annotation.vertex')
-	            );
+	    if ((isNaN(memberIndex) || insertPair) && member.type === 'way' && !isPTv2) {
+	      // Try to perform sensible inserts based on how the ways join together
+	      graph = addWayMember(relation, graph);
+	    } else {
+	      // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
+	      // Stops and Platforms for PTv2 should be ordered first.
+	      // hack: We do not currently have the ability to place them in the exactly correct order.
+	      if (isPTv2 && isNaN(memberIndex)) {
+	        memberIndex = 0;
+	      }
 
-	        } else {
-	            context.replace(
-	                actionNoop(),
-	                moveAnnotation(entity)
-	            );
-	        }
+	      graph = graph.replace(relation.addMember(member, memberIndex));
+	    }
 
-	        if (wasPoint) {
-	            context.enter(modeSelect(context, [entity.id]));
+	    return graph;
+	  }; // Add a way member into the relation "wherever it makes sense".
+	  // In this situation we were not supplied a memberIndex.
 
-	        } else {
-	            var reselection = _restoreSelectedIDs.filter(function(id) {
-	                return context.graph().hasEntity(id);
-	            });
+	  function addWayMember(relation, graph) {
+	    var groups, tempWay, insertPairIsReversed, item, i, j, k; // remove PTv2 stops and platforms before doing anything.
 
-	            if (reselection.length) {
-	                context.enter(modeSelect(context, reselection));
-	            } else {
-	                context.enter(modeBrowse(context));
-	            }
-	        }
-	    }
+	    var PTv2members = [];
+	    var members = [];
 
+	    for (i = 0; i < relation.members.length; i++) {
+	      var m = relation.members[i];
 
-	    function _actionBounceBack(nodeID, toLoc) {
-	        var moveNode = actionMoveNode(nodeID, toLoc);
-	        var action = function(graph, t) {
-	            // last time through, pop off the bounceback perform.
-	            // it will then overwrite the initial perform with a moveNode that does nothing
-	            if (t === 1) { context.pop(); }
-	            return moveNode(graph, t);
-	        };
-	        action.transitionable = true;
-	        return action;
+	      if (/stop|platform/.test(m.role)) {
+	        PTv2members.push(m);
+	      } else {
+	        members.push(m);
+	      }
 	    }
 
+	    relation = relation.update({
+	      members: members
+	    });
 
-	    function cancel() {
-	        drag.cancel();
-	        context.enter(modeBrowse(context));
+	    if (insertPair) {
+	      // We're adding a member that must stay paired with an existing member.
+	      // (This feature is used by `actionSplit`)
+	      //
+	      // This is tricky because the members may exist multiple times in the
+	      // member list, and with different A-B/B-A ordering and different roles.
+	      // (e.g. a bus route that loops out and back - #4589).
+	      //
+	      // Replace the existing member with a temporary way,
+	      // so that `osmJoinWays` can treat the pair like a single way.
+	      tempWay = osmWay({
+	        id: 'wTemp',
+	        nodes: insertPair.nodes
+	      });
+	      graph = graph.replace(tempWay);
+	      var tempMember = {
+	        id: tempWay.id,
+	        type: 'way',
+	        role: member.role
+	      };
+	      var tempRelation = relation.replaceMember({
+	        id: insertPair.originalID
+	      }, tempMember, true);
+	      groups = utilArrayGroupBy(tempRelation.members, 'type');
+	      groups.way = groups.way || []; // Insert pair is reversed if the inserted way comes before the original one.
+	      // (Except when they form a loop.)
+
+	      var originalWay = graph.entity(insertPair.originalID);
+	      var insertedWay = graph.entity(insertPair.insertedID);
+	      insertPairIsReversed = originalWay.nodes.length > 0 && insertedWay.nodes.length > 0 && insertedWay.nodes[insertedWay.nodes.length - 1] === originalWay.nodes[0] && originalWay.nodes[originalWay.nodes.length - 1] !== insertedWay.nodes[0];
+	    } else {
+	      // Add the member anywhere, one time. Just push and let `osmJoinWays` decide where to put it.
+	      groups = utilArrayGroupBy(relation.members, 'type');
+	      groups.way = groups.way || [];
+	      groups.way.push(member);
 	    }
 
+	    members = withIndex(groups.way);
+	    var joined = osmJoinWays(members, graph); // `joined` might not contain all of the way members,
+	    // But will contain only the completed (downloaded) members
 
-	    var drag = behaviorDrag()
-	        .selector('.layer-touch.points .target')
-	        .surface(context.container().select('.main-map').node())
-	        .origin(origin)
-	        .on('start', start)
-	        .on('move', move)
-	        .on('end', end);
+	    for (i = 0; i < joined.length; i++) {
+	      var segment = joined[i];
+	      var nodes = segment.nodes.slice();
+	      var startIndex = segment[0].index; // j = array index in `members` where this segment starts
 
+	      for (j = 0; j < members.length; j++) {
+	        if (members[j].index === startIndex) {
+	          break;
+	        }
+	      } // k = each member in segment
 
-	    mode.enter = function() {
-	        context.install(hover);
-	        context.install(edit);
-
-	        select(window)
-	            .on('keydown.dragNode', keydown)
-	            .on('keyup.dragNode', keyup);
 
-	        context.history()
-	            .on('undone.drag-node', cancel);
-	    };
+	      for (k = 0; k < segment.length; k++) {
+	        item = segment[k];
+	        var way = graph.entity(item.id); // If this is a paired item, generate members in correct order and role
 
+	        if (tempWay && item.id === tempWay.id) {
+	          var reverse = nodes[0].id !== insertPair.nodes[0] ^ insertPairIsReversed;
 
-	    mode.exit = function() {
-	        context.ui().sidebar.hover.cancel();
-	        context.uninstall(hover);
-	        context.uninstall(edit);
+	          if (reverse) {
+	            item.pair = [{
+	              id: insertPair.insertedID,
+	              type: 'way',
+	              role: item.role
+	            }, {
+	              id: insertPair.originalID,
+	              type: 'way',
+	              role: item.role
+	            }];
+	          } else {
+	            item.pair = [{
+	              id: insertPair.originalID,
+	              type: 'way',
+	              role: item.role
+	            }, {
+	              id: insertPair.insertedID,
+	              type: 'way',
+	              role: item.role
+	            }];
+	          }
+	        } // reorder `members` if necessary
 
-	        select(window)
-	            .on('keydown.dragNode', null)
-	            .on('keyup.dragNode', null);
 
-	        context.history()
-	            .on('undone.drag-node', null);
+	        if (k > 0) {
+	          if (j + k >= members.length || item.index !== members[j + k].index) {
+	            moveMember(members, item.index, j + k);
+	          }
+	        }
 
-	        _activeEntity = null;
+	        nodes.splice(0, way.nodes.length - 1);
+	      }
+	    }
 
-	        context.surface()
-	            .classed('nope', false)
-	            .classed('nope-suppressed', false)
-	            .classed('nope-disabled', false)
-	            .selectAll('.active')
-	            .classed('active', false);
+	    if (tempWay) {
+	      graph = graph.remove(tempWay);
+	    } // Final pass: skip dead items, split pairs, remove index properties
 
-	        stopNudge();
-	    };
 
+	    var wayMembers = [];
 
-	    mode.selectedIDs = function() {
-	        if (!arguments.length) { return _activeEntity ? [_activeEntity.id] : []; }
-	        // no assign
-	        return mode;
-	    };
+	    for (i = 0; i < members.length; i++) {
+	      item = members[i];
+	      if (item.index === -1) continue;
 
+	      if (item.pair) {
+	        wayMembers.push(item.pair[0]);
+	        wayMembers.push(item.pair[1]);
+	      } else {
+	        wayMembers.push(utilObjectOmit(item, ['index']));
+	      }
+	    } // Put stops and platforms first, then nodes, ways, relations
+	    // This is recommended for Public Transport v2 routes:
+	    // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
 
-	    mode.activeID = function() {
-	        if (!arguments.length) { return _activeEntity && _activeEntity.id; }
-	        // no assign
-	        return mode;
-	    };
 
+	    var newMembers = PTv2members.concat(groups.node || [], wayMembers, groups.relation || []);
+	    return graph.replace(relation.update({
+	      members: newMembers
+	    })); // `moveMember()` changes the `members` array in place by splicing
+	    // the item with `.index = findIndex` to where it belongs,
+	    // and marking the old position as "dead" with `.index = -1`
+	    //
+	    // j=5, k=0                jk
+	    // segment                 5 4 7 6
+	    // members       0 1 2 3 4 5 6 7 8 9        keep 5 in j+k
+	    //
+	    // j=5, k=1                j k
+	    // segment                 5 4 7 6
+	    // members       0 1 2 3 4 5 6 7 8 9        move 4 to j+k
+	    // members       0 1 2 3 x 5 4 6 7 8 9      moved
+	    //
+	    // j=5, k=2                j   k
+	    // segment                 5 4 7 6
+	    // members       0 1 2 3 x 5 4 6 7 8 9      move 7 to j+k
+	    // members       0 1 2 3 x 5 4 7 6 x 8 9    moved
+	    //
+	    // j=5, k=3                j     k
+	    // segment                 5 4 7 6
+	    // members       0 1 2 3 x 5 4 7 6 x 8 9    keep 6 in j+k
+	    //
 
-	    mode.restoreSelectedIDs = function(_) {
-	        if (!arguments.length) { return _restoreSelectedIDs; }
-	        _restoreSelectedIDs = _;
-	        return mode;
-	    };
+	    function moveMember(arr, findIndex, toIndex) {
+	      var i;
 
+	      for (i = 0; i < arr.length; i++) {
+	        if (arr[i].index === findIndex) {
+	          break;
+	        }
+	      }
 
-	    mode.behavior = drag;
+	      var item = Object.assign({}, arr[i]); // shallow copy
 
+	      arr[i].index = -1; // mark as dead
 
-	    return mode;
-	}
+	      item.index = toIndex;
+	      arr.splice(toIndex, 0, item);
+	    } // This is the same as `Relation.indexedMembers`,
+	    // Except we don't want to index all the members, only the ways
 
-	function quickselect(arr, k, left, right, compare) {
-	    quickselectStep(arr, k, left || 0, right || (arr.length - 1), compare || defaultCompare);
-	}
 
-	function quickselectStep(arr, k, left, right, compare) {
+	    function withIndex(arr) {
+	      var result = new Array(arr.length);
 
-	    while (right > left) {
-	        if (right - left > 600) {
-	            var n = right - left + 1;
-	            var m = k - left + 1;
-	            var z = Math.log(n);
-	            var s = 0.5 * Math.exp(2 * z / 3);
-	            var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
-	            var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
-	            var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
-	            quickselectStep(arr, k, newLeft, newRight, compare);
-	        }
+	      for (var i = 0; i < arr.length; i++) {
+	        result[i] = Object.assign({}, arr[i]); // shallow copy
 
-	        var t = arr[k];
-	        var i = left;
-	        var j = right;
+	        result[i].index = i;
+	      }
 
-	        swap(arr, left, k);
-	        if (compare(arr[right], t) > 0) { swap(arr, left, right); }
+	      return result;
+	    }
+	  }
+	}
 
-	        while (i < j) {
-	            swap(arr, i, j);
-	            i++;
-	            j--;
-	            while (compare(arr[i], t) < 0) { i++; }
-	            while (compare(arr[j], t) > 0) { j--; }
-	        }
+	function actionAddMidpoint(midpoint, node) {
+	  return function (graph) {
+	    graph = graph.replace(node.move(midpoint.loc));
+	    var parents = utilArrayIntersection(graph.parentWays(graph.entity(midpoint.edge[0])), graph.parentWays(graph.entity(midpoint.edge[1])));
+	    parents.forEach(function (way) {
+	      for (var i = 0; i < way.nodes.length - 1; i++) {
+	        if (geoEdgeEqual([way.nodes[i], way.nodes[i + 1]], midpoint.edge)) {
+	          graph = graph.replace(graph.entity(way.id).addNode(node.id, i + 1)); // Add only one midpoint on doubled-back segments,
+	          // turning them into self-intersections.
 
-	        if (compare(arr[left], t) === 0) { swap(arr, left, j); }
-	        else {
-	            j++;
-	            swap(arr, j, right);
+	          return;
 	        }
-
-	        if (j <= k) { left = j + 1; }
-	        if (k <= j) { right = j - 1; }
-	    }
+	      }
+	    });
+	    return graph;
+	  };
 	}
 
-	function swap(arr, i, j) {
-	    var tmp = arr[i];
-	    arr[i] = arr[j];
-	    arr[j] = tmp;
+	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/AddNodeToWayAction.as
+	function actionAddVertex(wayId, nodeId, index) {
+	  return function (graph) {
+	    return graph.replace(graph.entity(wayId).addNode(nodeId, index));
+	  };
 	}
 
-	function defaultCompare(a, b) {
-	    return a < b ? -1 : a > b ? 1 : 0;
+	function actionChangeMember(relationId, member, memberIndex) {
+	  return function (graph) {
+	    return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
+	  };
 	}
 
-	var RBush = function RBush(maxEntries) {
-	    if ( maxEntries === void 0 ) maxEntries = 9;
-
-	    // max entries in a node is 9 by default; min node fill is 40% for best performance
-	    this._maxEntries = Math.max(4, maxEntries);
-	    this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
-	    this.clear();
-	};
-
-	RBush.prototype.all = function all () {
-	    return this._all(this.data, []);
-	};
+	function actionChangePreset(entityID, oldPreset, newPreset, skipFieldDefaults) {
+	  return function action(graph) {
+	    var entity = graph.entity(entityID);
+	    var geometry = entity.geometry(graph);
+	    var tags = entity.tags; // preserve tags that the new preset might care about, if any
 
-	RBush.prototype.search = function search (bbox) {
-	    var node = this.data;
-	    var result = [];
+	    if (oldPreset) tags = oldPreset.unsetTags(tags, geometry, newPreset && newPreset.addTags ? Object.keys(newPreset.addTags) : null);
+	    if (newPreset) tags = newPreset.setTags(tags, geometry, skipFieldDefaults);
+	    return graph.replace(entity.update({
+	      tags: tags
+	    }));
+	  };
+	}
 
-	    if (!intersects(bbox, node)) { return result; }
+	function actionChangeTags(entityId, tags) {
+	  return function (graph) {
+	    var entity = graph.entity(entityId);
+	    return graph.replace(entity.update({
+	      tags: tags
+	    }));
+	  };
+	}
 
-	    var toBBox = this.toBBox;
-	    var nodesToSearch = [];
+	function osmNode() {
+	  if (!(this instanceof osmNode)) {
+	    return new osmNode().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
+	  }
+	}
+	osmEntity.node = osmNode;
+	osmNode.prototype = Object.create(osmEntity.prototype);
+	Object.assign(osmNode.prototype, {
+	  type: 'node',
+	  loc: [9999, 9999],
+	  extent: function extent() {
+	    return new geoExtent(this.loc);
+	  },
+	  geometry: function geometry(graph) {
+	    return graph["transient"](this, 'geometry', function () {
+	      return graph.isPoi(this) ? 'point' : 'vertex';
+	    });
+	  },
+	  move: function move(loc) {
+	    return this.update({
+	      loc: loc
+	    });
+	  },
+	  isDegenerate: function isDegenerate() {
+	    return !(Array.isArray(this.loc) && this.loc.length === 2 && this.loc[0] >= -180 && this.loc[0] <= 180 && this.loc[1] >= -90 && this.loc[1] <= 90);
+	  },
+	  // Inspect tags and geometry to determine which direction(s) this node/vertex points
+	  directions: function directions(resolver, projection) {
+	    var val;
+	    var i; // which tag to use?
+
+	    if (this.isHighwayIntersection(resolver) && (this.tags.stop || '').toLowerCase() === 'all') {
+	      // all-way stop tag on a highway intersection
+	      val = 'all';
+	    } else {
+	      // generic direction tag
+	      val = (this.tags.direction || '').toLowerCase(); // better suffix-style direction tag
 
-	    while (node) {
-	        for (var i = 0; i < node.children.length; i++) {
-	            var child = node.children[i];
-	            var childBBox = node.leaf ? toBBox(child) : child;
+	      var re = /:direction$/i;
+	      var keys = Object.keys(this.tags);
 
-	            if (intersects(bbox, childBBox)) {
-	                if (node.leaf) { result.push(child); }
-	                else if (contains$1(bbox, childBBox)) { this._all(child, result); }
-	                else { nodesToSearch.push(child); }
-	            }
+	      for (i = 0; i < keys.length; i++) {
+	        if (re.test(keys[i])) {
+	          val = this.tags[keys[i]].toLowerCase();
+	          break;
 	        }
-	        node = nodesToSearch.pop();
+	      }
 	    }
 
-	    return result;
-	};
-
-	RBush.prototype.collides = function collides (bbox) {
-	    var node = this.data;
+	    if (val === '') return [];
+	    var cardinal = {
+	      north: 0,
+	      n: 0,
+	      northnortheast: 22,
+	      nne: 22,
+	      northeast: 45,
+	      ne: 45,
+	      eastnortheast: 67,
+	      ene: 67,
+	      east: 90,
+	      e: 90,
+	      eastsoutheast: 112,
+	      ese: 112,
+	      southeast: 135,
+	      se: 135,
+	      southsoutheast: 157,
+	      sse: 157,
+	      south: 180,
+	      s: 180,
+	      southsouthwest: 202,
+	      ssw: 202,
+	      southwest: 225,
+	      sw: 225,
+	      westsouthwest: 247,
+	      wsw: 247,
+	      west: 270,
+	      w: 270,
+	      westnorthwest: 292,
+	      wnw: 292,
+	      northwest: 315,
+	      nw: 315,
+	      northnorthwest: 337,
+	      nnw: 337
+	    };
+	    var values = val.split(';');
+	    var results = [];
+	    values.forEach(function (v) {
+	      // swap cardinal for numeric directions
+	      if (cardinal[v] !== undefined) {
+	        v = cardinal[v];
+	      } // numeric direction - just add to results
 
-	    if (!intersects(bbox, node)) { return false; }
 
-	    var nodesToSearch = [];
-	    while (node) {
-	        for (var i = 0; i < node.children.length; i++) {
-	            var child = node.children[i];
-	            var childBBox = node.leaf ? this.toBBox(child) : child;
+	      if (v !== '' && !isNaN(+v)) {
+	        results.push(+v);
+	        return;
+	      } // string direction - inspect parent ways
 
-	            if (intersects(bbox, childBBox)) {
-	                if (node.leaf || contains$1(bbox, childBBox)) { return true; }
-	                nodesToSearch.push(child);
-	            }
-	        }
-	        node = nodesToSearch.pop();
-	    }
 
-	    return false;
-	};
+	      var lookBackward = this.tags['traffic_sign:backward'] || v === 'backward' || v === 'both' || v === 'all';
+	      var lookForward = this.tags['traffic_sign:forward'] || v === 'forward' || v === 'both' || v === 'all';
+	      if (!lookForward && !lookBackward) return;
+	      var nodeIds = {};
+	      resolver.parentWays(this).forEach(function (parent) {
+	        var nodes = parent.nodes;
 
-	RBush.prototype.load = function load (data) {
-	    if (!(data && data.length)) { return this; }
+	        for (i = 0; i < nodes.length; i++) {
+	          if (nodes[i] === this.id) {
+	            // match current entity
+	            if (lookForward && i > 0) {
+	              nodeIds[nodes[i - 1]] = true; // look back to prev node
+	            }
 
-	    if (data.length < this._minEntries) {
-	        for (var i = 0; i < data.length; i++) {
-	            this.insert(data[i]);
+	            if (lookBackward && i < nodes.length - 1) {
+	              nodeIds[nodes[i + 1]] = true; // look ahead to next node
+	            }
+	          }
 	        }
-	        return this;
-	    }
-
-	    // recursively build the tree with the given data from scratch using OMT algorithm
-	    var node = this._build(data.slice(), 0, data.length - 1, 0);
-
-	    if (!this.data.children.length) {
-	        // save as is if tree is empty
-	        this.data = node;
-
-	    } else if (this.data.height === node.height) {
-	        // split root if trees have the same height
-	        this._splitRoot(this.data, node);
+	      }, this);
+	      Object.keys(nodeIds).forEach(function (nodeId) {
+	        // +90 because geoAngle returns angle from X axis, not Y (north)
+	        results.push(geoAngle(this, resolver.entity(nodeId), projection) * (180 / Math.PI) + 90);
+	      }, this);
+	    }, this);
+	    return utilArrayUniq(results);
+	  },
+	  isCrossing: function isCrossing() {
+	    return this.tags.highway === 'crossing' || this.tags.railway && this.tags.railway.indexOf('crossing') !== -1;
+	  },
+	  isEndpoint: function isEndpoint(resolver) {
+	    return resolver["transient"](this, 'isEndpoint', function () {
+	      var id = this.id;
+	      return resolver.parentWays(this).filter(function (parent) {
+	        return !parent.isClosed() && !!parent.affix(id);
+	      }).length > 0;
+	    });
+	  },
+	  isConnected: function isConnected(resolver) {
+	    return resolver["transient"](this, 'isConnected', function () {
+	      var parents = resolver.parentWays(this);
 
-	    } else {
-	        if (this.data.height < node.height) {
-	            // swap trees if inserted one is bigger
-	            var tmpNode = this.data;
-	            this.data = node;
-	            node = tmpNode;
+	      if (parents.length > 1) {
+	        // vertex is connected to multiple parent ways
+	        for (var i in parents) {
+	          if (parents[i].geometry(resolver) === 'line' && parents[i].hasInterestingTags()) return true;
 	        }
+	      } else if (parents.length === 1) {
+	        var way = parents[0];
+	        var nodes = way.nodes.slice();
 
-	        // insert the small tree into the large tree at appropriate level
-	        this._insert(node, this.data.height - node.height - 1, true);
-	    }
-
-	    return this;
-	};
-
-	RBush.prototype.insert = function insert (item) {
-	    if (item) { this._insert(item, this.data.height - 1); }
-	    return this;
-	};
-
-	RBush.prototype.clear = function clear () {
-	    this.data = createNode([]);
-	    return this;
-	};
-
-	RBush.prototype.remove = function remove (item, equalsFn) {
-	    if (!item) { return this; }
-
-	    var node = this.data;
-	    var bbox = this.toBBox(item);
-	    var path = [];
-	    var indexes = [];
-	    var i, parent, goingUp;
-
-	    // depth-first iterative tree traversal
-	    while (node || path.length) {
+	        if (way.isClosed()) {
+	          nodes.pop();
+	        } // ignore connecting node if closed
+	        // return true if vertex appears multiple times (way is self intersecting)
 
-	        if (!node) { // go up
-	            node = path.pop();
-	            parent = path[path.length - 1];
-	            i = indexes.pop();
-	            goingUp = true;
-	        }
 
-	        if (node.leaf) { // check current node
-	            var index = findItem(item, node.children, equalsFn);
+	        return nodes.indexOf(this.id) !== nodes.lastIndexOf(this.id);
+	      }
 
-	            if (index !== -1) {
-	                // item found, remove the item and condense tree upwards
-	                node.children.splice(index, 1);
-	                path.push(node);
-	                this._condense(path);
-	                return this;
+	      return false;
+	    });
+	  },
+	  parentIntersectionWays: function parentIntersectionWays(resolver) {
+	    return resolver["transient"](this, 'parentIntersectionWays', function () {
+	      return resolver.parentWays(this).filter(function (parent) {
+	        return (parent.tags.highway || parent.tags.waterway || parent.tags.railway || parent.tags.aeroway) && parent.geometry(resolver) === 'line';
+	      });
+	    });
+	  },
+	  isIntersection: function isIntersection(resolver) {
+	    return this.parentIntersectionWays(resolver).length > 1;
+	  },
+	  isHighwayIntersection: function isHighwayIntersection(resolver) {
+	    return resolver["transient"](this, 'isHighwayIntersection', function () {
+	      return resolver.parentWays(this).filter(function (parent) {
+	        return parent.tags.highway && parent.geometry(resolver) === 'line';
+	      }).length > 1;
+	    });
+	  },
+	  isOnAddressLine: function isOnAddressLine(resolver) {
+	    return resolver["transient"](this, 'isOnAddressLine', function () {
+	      return resolver.parentWays(this).filter(function (parent) {
+	        return parent.tags.hasOwnProperty('addr:interpolation') && parent.geometry(resolver) === 'line';
+	      }).length > 0;
+	    });
+	  },
+	  asJXON: function asJXON(changeset_id) {
+	    var r = {
+	      node: {
+	        '@id': this.osmId(),
+	        '@lon': this.loc[0],
+	        '@lat': this.loc[1],
+	        '@version': this.version || 0,
+	        tag: Object.keys(this.tags).map(function (k) {
+	          return {
+	            keyAttributes: {
+	              k: k,
+	              v: this.tags[k]
 	            }
-	        }
-
-	        if (!goingUp && !node.leaf && contains$1(node, bbox)) { // go down
-	            path.push(node);
-	            indexes.push(i);
-	            i = 0;
-	            parent = node;
-	            node = node.children[0];
+	          };
+	        }, this)
+	      }
+	    };
+	    if (changeset_id) r.node['@changeset'] = changeset_id;
+	    return r;
+	  },
+	  asGeoJSON: function asGeoJSON() {
+	    return {
+	      type: 'Point',
+	      coordinates: this.loc
+	    };
+	  }
+	});
 
-	        } else if (parent) { // go right
-	            i++;
-	            node = parent.children[i];
-	            goingUp = false;
+	function actionCircularize(wayId, projection, maxAngle) {
+	  maxAngle = (maxAngle || 20) * Math.PI / 180;
+
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var way = graph.entity(wayId);
+	    var origNodes = {};
+	    graph.childNodes(way).forEach(function (node) {
+	      if (!origNodes[node.id]) origNodes[node.id] = node;
+	    });
 
-	        } else { node = null; } // nothing found
+	    if (!way.isConvex(graph)) {
+	      graph = action.makeConvex(graph);
 	    }
 
-	    return this;
-	};
-
-	RBush.prototype.toBBox = function toBBox (item) { return item; };
-
-	RBush.prototype.compareMinX = function compareMinX (a, b) { return a.minX - b.minX; };
-	RBush.prototype.compareMinY = function compareMinY (a, b) { return a.minY - b.minY; };
+	    var nodes = utilArrayUniq(graph.childNodes(way));
+	    var keyNodes = nodes.filter(function (n) {
+	      return graph.parentWays(n).length !== 1;
+	    });
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var keyPoints = keyNodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var centroid = points.length === 2 ? geoVecInterp(points[0], points[1], 0.5) : d3_polygonCentroid(points);
+	    var radius = d3_median(points, function (p) {
+	      return geoVecLength(centroid, p);
+	    });
+	    var sign = d3_polygonArea(points) > 0 ? 1 : -1;
+	    var ids, i, j, k; // we need at least two key nodes for the algorithm to work
+
+	    if (!keyNodes.length) {
+	      keyNodes = [nodes[0]];
+	      keyPoints = [points[0]];
+	    }
+
+	    if (keyNodes.length === 1) {
+	      var index = nodes.indexOf(keyNodes[0]);
+	      var oppositeIndex = Math.floor((index + nodes.length / 2) % nodes.length);
+	      keyNodes.push(nodes[oppositeIndex]);
+	      keyPoints.push(points[oppositeIndex]);
+	    } // key points and nodes are those connected to the ways,
+	    // they are projected onto the circle, in between nodes are moved
+	    // to constant intervals between key nodes, extra in between nodes are
+	    // added if necessary.
+
+
+	    for (i = 0; i < keyPoints.length; i++) {
+	      var nextKeyNodeIndex = (i + 1) % keyNodes.length;
+	      var startNode = keyNodes[i];
+	      var endNode = keyNodes[nextKeyNodeIndex];
+	      var startNodeIndex = nodes.indexOf(startNode);
+	      var endNodeIndex = nodes.indexOf(endNode);
+	      var numberNewPoints = -1;
+	      var indexRange = endNodeIndex - startNodeIndex;
+	      var nearNodes = {};
+	      var inBetweenNodes = [];
+	      var startAngle, endAngle, totalAngle, eachAngle;
+	      var angle, loc, node, origNode;
+
+	      if (indexRange < 0) {
+	        indexRange += nodes.length;
+	      } // position this key node
+
+
+	      var distance = geoVecLength(centroid, keyPoints[i]) || 1e-4;
+	      keyPoints[i] = [centroid[0] + (keyPoints[i][0] - centroid[0]) / distance * radius, centroid[1] + (keyPoints[i][1] - centroid[1]) / distance * radius];
+	      loc = projection.invert(keyPoints[i]);
+	      node = keyNodes[i];
+	      origNode = origNodes[node.id];
+	      node = node.move(geoVecInterp(origNode.loc, loc, t));
+	      graph = graph.replace(node); // figure out the between delta angle we want to match to
+
+	      startAngle = Math.atan2(keyPoints[i][1] - centroid[1], keyPoints[i][0] - centroid[0]);
+	      endAngle = Math.atan2(keyPoints[nextKeyNodeIndex][1] - centroid[1], keyPoints[nextKeyNodeIndex][0] - centroid[0]);
+	      totalAngle = endAngle - startAngle; // detects looping around -pi/pi
+
+	      if (totalAngle * sign > 0) {
+	        totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
+	      }
 
-	RBush.prototype.toJSON = function toJSON () { return this.data; };
+	      do {
+	        numberNewPoints++;
+	        eachAngle = totalAngle / (indexRange + numberNewPoints);
+	      } while (Math.abs(eachAngle) > maxAngle); // move existing nodes
 
-	RBush.prototype.fromJSON = function fromJSON (data) {
-	    this.data = data;
-	    return this;
-	};
 
-	RBush.prototype._all = function _all (node, result) {
-	    var nodesToSearch = [];
-	    while (node) {
-	        if (node.leaf) { result.push.apply(result, node.children); }
-	        else { nodesToSearch.push.apply(nodesToSearch, node.children); }
+	      for (j = 1; j < indexRange; j++) {
+	        angle = startAngle + j * eachAngle;
+	        loc = projection.invert([centroid[0] + Math.cos(angle) * radius, centroid[1] + Math.sin(angle) * radius]);
+	        node = nodes[(j + startNodeIndex) % nodes.length];
+	        origNode = origNodes[node.id];
+	        nearNodes[node.id] = angle;
+	        node = node.move(geoVecInterp(origNode.loc, loc, t));
+	        graph = graph.replace(node);
+	      } // add new in between nodes if necessary
 
-	        node = nodesToSearch.pop();
-	    }
-	    return result;
-	};
 
-	RBush.prototype._build = function _build (items, left, right, height) {
+	      for (j = 0; j < numberNewPoints; j++) {
+	        angle = startAngle + (indexRange + j) * eachAngle;
+	        loc = projection.invert([centroid[0] + Math.cos(angle) * radius, centroid[1] + Math.sin(angle) * radius]); // choose a nearnode to use as the original
 
-	    var N = right - left + 1;
-	    var M = this._maxEntries;
-	    var node;
+	        var min = Infinity;
 
-	    if (N <= M) {
-	        // reached leaf level; return leaf
-	        node = createNode(items.slice(left, right + 1));
-	        calcBBox(node, this.toBBox);
-	        return node;
-	    }
+	        for (var nodeId in nearNodes) {
+	          var nearAngle = nearNodes[nodeId];
+	          var dist = Math.abs(nearAngle - angle);
 
-	    if (!height) {
-	        // target height of the bulk-loaded tree
-	        height = Math.ceil(Math.log(N) / Math.log(M));
+	          if (dist < min) {
+	            min = dist;
+	            origNode = origNodes[nodeId];
+	          }
+	        }
 
-	        // target number of root entries to maximize storage utilization
-	        M = Math.ceil(N / Math.pow(M, height - 1));
-	    }
+	        node = osmNode({
+	          loc: geoVecInterp(origNode.loc, loc, t)
+	        });
+	        graph = graph.replace(node);
+	        nodes.splice(endNodeIndex + j, 0, node);
+	        inBetweenNodes.push(node.id);
+	      } // Check for other ways that share these keyNodes..
+	      // If keyNodes are adjacent in both ways,
+	      // we can add inBetweenNodes to that shared way too..
 
-	    node = createNode([]);
-	    node.leaf = false;
-	    node.height = height;
 
-	    // split the items into M mostly square tiles
+	      if (indexRange === 1 && inBetweenNodes.length) {
+	        var startIndex1 = way.nodes.lastIndexOf(startNode.id);
+	        var endIndex1 = way.nodes.lastIndexOf(endNode.id);
+	        var wayDirection1 = endIndex1 - startIndex1;
 
-	    var N2 = Math.ceil(N / M);
-	    var N1 = N2 * Math.ceil(Math.sqrt(M));
+	        if (wayDirection1 < -1) {
+	          wayDirection1 = 1;
+	        }
 
-	    multiSelect(items, left, right, N1, this.compareMinX);
+	        var parentWays = graph.parentWays(keyNodes[i]);
 
-	    for (var i = left; i <= right; i += N1) {
+	        for (j = 0; j < parentWays.length; j++) {
+	          var sharedWay = parentWays[j];
+	          if (sharedWay === way) continue;
 
-	        var right2 = Math.min(i + N1 - 1, right);
+	          if (sharedWay.areAdjacent(startNode.id, endNode.id)) {
+	            var startIndex2 = sharedWay.nodes.lastIndexOf(startNode.id);
+	            var endIndex2 = sharedWay.nodes.lastIndexOf(endNode.id);
+	            var wayDirection2 = endIndex2 - startIndex2;
+	            var insertAt = endIndex2;
 
-	        multiSelect(items, i, right2, N2, this.compareMinY);
+	            if (wayDirection2 < -1) {
+	              wayDirection2 = 1;
+	            }
 
-	        for (var j = i; j <= right2; j += N2) {
+	            if (wayDirection1 !== wayDirection2) {
+	              inBetweenNodes.reverse();
+	              insertAt = startIndex2;
+	            }
 
-	            var right3 = Math.min(j + N2 - 1, right2);
+	            for (k = 0; k < inBetweenNodes.length; k++) {
+	              sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
+	            }
 
-	            // pack each entry recursively
-	            node.children.push(this._build(items, j, right3, height - 1));
+	            graph = graph.replace(sharedWay);
+	          }
 	        }
-	    }
+	      }
+	    } // update the way to have all the new nodes
 
-	    calcBBox(node, this.toBBox);
 
-	    return node;
-	};
+	    ids = nodes.map(function (n) {
+	      return n.id;
+	    });
+	    ids.push(ids[0]);
+	    way = way.update({
+	      nodes: ids
+	    });
+	    graph = graph.replace(way);
+	    return graph;
+	  };
 
-	RBush.prototype._chooseSubtree = function _chooseSubtree (bbox, node, level, path) {
-	    while (true) {
-	        path.push(node);
+	  action.makeConvex = function (graph) {
+	    var way = graph.entity(wayId);
+	    var nodes = utilArrayUniq(graph.childNodes(way));
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var sign = d3_polygonArea(points) > 0 ? 1 : -1;
+	    var hull = d3_polygonHull(points);
+	    var i, j; // D3 convex hulls go counterclockwise..
+
+	    if (sign === -1) {
+	      nodes.reverse();
+	      points.reverse();
+	    }
 
-	        if (node.leaf || path.length - 1 === level) { break; }
+	    for (i = 0; i < hull.length - 1; i++) {
+	      var startIndex = points.indexOf(hull[i]);
+	      var endIndex = points.indexOf(hull[i + 1]);
+	      var indexRange = endIndex - startIndex;
 
-	        var minArea = Infinity;
-	        var minEnlargement = Infinity;
-	        var targetNode = (void 0);
+	      if (indexRange < 0) {
+	        indexRange += nodes.length;
+	      } // move interior nodes to the surface of the convex hull..
 
-	        for (var i = 0; i < node.children.length; i++) {
-	            var child = node.children[i];
-	            var area = bboxArea(child);
-	            var enlargement = enlargedArea(bbox, child) - area;
-
-	            // choose entry with the least area enlargement
-	            if (enlargement < minEnlargement) {
-	                minEnlargement = enlargement;
-	                minArea = area < minArea ? area : minArea;
-	                targetNode = child;
-
-	            } else if (enlargement === minEnlargement) {
-	                // otherwise choose one with the smallest area
-	                if (area < minArea) {
-	                    minArea = area;
-	                    targetNode = child;
-	                }
-	            }
-	        }
 
-	        node = targetNode || node.children[0];
+	      for (j = 1; j < indexRange; j++) {
+	        var point = geoVecInterp(hull[i], hull[i + 1], j / indexRange);
+	        var node = nodes[(j + startIndex) % nodes.length].move(projection.invert(point));
+	        graph = graph.replace(node);
+	      }
 	    }
 
-	    return node;
-	};
+	    return graph;
+	  };
 
-	RBush.prototype._insert = function _insert (item, level, isNode) {
-	    var bbox = isNode ? item : this.toBBox(item);
-	    var insertPath = [];
+	  action.disabled = function (graph) {
+	    if (!graph.entity(wayId).isClosed()) {
+	      return 'not_closed';
+	    } //disable when already circular
 
-	    // find the best node for accommodating the item, saving all nodes along the path too
-	    var node = this._chooseSubtree(bbox, this.data, level, insertPath);
 
-	    // put the item into the node
-	    node.children.push(item);
-	    extend$1(node, bbox);
+	    var way = graph.entity(wayId);
+	    var nodes = utilArrayUniq(graph.childNodes(way));
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var hull = d3_polygonHull(points);
+	    var epsilonAngle = Math.PI / 180;
 
-	    // split on node overflow; propagate upwards if necessary
-	    while (level >= 0) {
-	        if (insertPath[level].children.length > this._maxEntries) {
-	            this._split(insertPath, level);
-	            level--;
-	        } else { break; }
+	    if (hull.length !== points.length || hull.length < 3) {
+	      return false;
 	    }
 
-	    // adjust bboxes along the insertion path
-	    this._adjustParentBBoxes(bbox, insertPath, level);
-	};
-
-	// split overflowed node into two
-	RBush.prototype._split = function _split (insertPath, level) {
-	    var node = insertPath[level];
-	    var M = node.children.length;
-	    var m = this._minEntries;
+	    var centroid = d3_polygonCentroid(points);
+	    var radius = geoVecLengthSquare(centroid, points[0]);
+	    var i, actualPoint; // compare distances between centroid and points
 
-	    this._chooseSplitAxis(node, m, M);
+	    for (i = 0; i < hull.length; i++) {
+	      actualPoint = hull[i];
+	      var actualDist = geoVecLengthSquare(actualPoint, centroid);
+	      var diff = Math.abs(actualDist - radius); //compare distances with epsilon-error (5%)
 
-	    var splitIndex = this._chooseSplitIndex(node, m, M);
+	      if (diff > 0.05 * radius) {
+	        return false;
+	      }
+	    } //check if central angles are smaller than maxAngle
 
-	    var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));
-	    newNode.height = node.height;
-	    newNode.leaf = node.leaf;
 
-	    calcBBox(node, this.toBBox);
-	    calcBBox(newNode, this.toBBox);
+	    for (i = 0; i < hull.length; i++) {
+	      actualPoint = hull[i];
+	      var nextPoint = hull[(i + 1) % hull.length];
+	      var startAngle = Math.atan2(actualPoint[1] - centroid[1], actualPoint[0] - centroid[0]);
+	      var endAngle = Math.atan2(nextPoint[1] - centroid[1], nextPoint[0] - centroid[0]);
+	      var angle = endAngle - startAngle;
 
-	    if (level) { insertPath[level - 1].children.push(newNode); }
-	    else { this._splitRoot(node, newNode); }
-	};
+	      if (angle < 0) {
+	        angle = -angle;
+	      }
 
-	RBush.prototype._splitRoot = function _splitRoot (node, newNode) {
-	    // split root node
-	    this.data = createNode([node, newNode]);
-	    this.data.height = node.height + 1;
-	    this.data.leaf = false;
-	    calcBBox(this.data, this.toBBox);
-	};
+	      if (angle > Math.PI) {
+	        angle = 2 * Math.PI - angle;
+	      }
 
-	RBush.prototype._chooseSplitIndex = function _chooseSplitIndex (node, m, M) {
-	    var index;
-	    var minOverlap = Infinity;
-	    var minArea = Infinity;
+	      if (angle > maxAngle + epsilonAngle) {
+	        return false;
+	      }
+	    }
 
-	    for (var i = m; i <= M - m; i++) {
-	        var bbox1 = distBBox(node, 0, i, this.toBBox);
-	        var bbox2 = distBBox(node, i, M, this.toBBox);
+	    return 'already_circular';
+	  };
 
-	        var overlap = intersectionArea(bbox1, bbox2);
-	        var area = bboxArea(bbox1) + bboxArea(bbox2);
+	  action.transitionable = true;
+	  return action;
+	}
 
-	        // choose distribution with minimum overlap
-	        if (overlap < minOverlap) {
-	            minOverlap = overlap;
-	            index = i;
+	function actionDeleteWay(wayID) {
+	  function canDeleteNode(node, graph) {
+	    // don't delete nodes still attached to ways or relations
+	    if (graph.parentWays(node).length || graph.parentRelations(node).length) return false;
+	    var geometries = osmNodeGeometriesForTags(node.tags); // don't delete if this node can be a standalone point
 
-	            minArea = area < minArea ? area : minArea;
+	    if (geometries.point) return false; // delete if this node only be a vertex
 
-	        } else if (overlap === minOverlap) {
-	            // otherwise choose distribution with minimum area
-	            if (area < minArea) {
-	                minArea = area;
-	                index = i;
-	            }
-	        }
-	    }
+	    if (geometries.vertex) return true; // iD doesn't know if this should be a point or vertex,
+	    // so only delete if there are no interesting tags
 
-	    return index || M - m;
-	};
+	    return !node.hasInterestingTags();
+	  }
 
-	// sorts node children by the best axis for split
-	RBush.prototype._chooseSplitAxis = function _chooseSplitAxis (node, m, M) {
-	    var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
-	    var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;
-	    var xMargin = this._allDistMargin(node, m, M, compareMinX);
-	    var yMargin = this._allDistMargin(node, m, M, compareMinY);
+	  var action = function action(graph) {
+	    var way = graph.entity(wayID);
+	    graph.parentRelations(way).forEach(function (parent) {
+	      parent = parent.removeMembersWithID(wayID);
+	      graph = graph.replace(parent);
 
-	    // if total distributions margin value is minimal for x, sort by minX,
-	    // otherwise it's already sorted by minY
-	    if (xMargin < yMargin) { node.children.sort(compareMinX); }
-	};
+	      if (parent.isDegenerate()) {
+	        graph = actionDeleteRelation(parent.id)(graph);
+	      }
+	    });
+	    new Set(way.nodes).forEach(function (nodeID) {
+	      graph = graph.replace(way.removeNode(nodeID));
+	      var node = graph.entity(nodeID);
 
-	// total margin of all possible split distributions where each node is at least m full
-	RBush.prototype._allDistMargin = function _allDistMargin (node, m, M, compare) {
-	    node.children.sort(compare);
+	      if (canDeleteNode(node, graph)) {
+	        graph = graph.remove(node);
+	      }
+	    });
+	    return graph.remove(way);
+	  };
 
-	    var toBBox = this.toBBox;
-	    var leftBBox = distBBox(node, 0, m, toBBox);
-	    var rightBBox = distBBox(node, M - m, M, toBBox);
-	    var margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);
+	  return action;
+	}
 
-	    for (var i = m; i < M - m; i++) {
-	        var child = node.children[i];
-	        extend$1(leftBBox, node.leaf ? toBBox(child) : child);
-	        margin += bboxMargin(leftBBox);
-	    }
+	function actionDeleteMultiple(ids) {
+	  var actions = {
+	    way: actionDeleteWay,
+	    node: actionDeleteNode,
+	    relation: actionDeleteRelation
+	  };
 
-	    for (var i$1 = M - m - 1; i$1 >= m; i$1--) {
-	        var child$1 = node.children[i$1];
-	        extend$1(rightBBox, node.leaf ? toBBox(child$1) : child$1);
-	        margin += bboxMargin(rightBBox);
-	    }
+	  var action = function action(graph) {
+	    ids.forEach(function (id) {
+	      if (graph.hasEntity(id)) {
+	        // It may have been deleted already.
+	        graph = actions[graph.entity(id).type](id)(graph);
+	      }
+	    });
+	    return graph;
+	  };
 
-	    return margin;
-	};
+	  return action;
+	}
 
-	RBush.prototype._adjustParentBBoxes = function _adjustParentBBoxes (bbox, path, level) {
-	    // adjust bboxes along the given tree path
-	    for (var i = level; i >= 0; i--) {
-	        extend$1(path[i], bbox);
-	    }
-	};
+	function actionDeleteRelation(relationID, allowUntaggedMembers) {
+	  function canDeleteEntity(entity, graph) {
+	    return !graph.parentWays(entity).length && !graph.parentRelations(entity).length && !entity.hasInterestingTags() && !allowUntaggedMembers;
+	  }
 
-	RBush.prototype._condense = function _condense (path) {
-	    // go through the path, removing empty nodes and updating bboxes
-	    for (var i = path.length - 1, siblings = (void 0); i >= 0; i--) {
-	        if (path[i].children.length === 0) {
-	            if (i > 0) {
-	                siblings = path[i - 1].children;
-	                siblings.splice(siblings.indexOf(path[i]), 1);
+	  var action = function action(graph) {
+	    var relation = graph.entity(relationID);
+	    graph.parentRelations(relation).forEach(function (parent) {
+	      parent = parent.removeMembersWithID(relationID);
+	      graph = graph.replace(parent);
 
-	            } else { this.clear(); }
+	      if (parent.isDegenerate()) {
+	        graph = actionDeleteRelation(parent.id)(graph);
+	      }
+	    });
+	    var memberIDs = utilArrayUniq(relation.members.map(function (m) {
+	      return m.id;
+	    }));
+	    memberIDs.forEach(function (memberID) {
+	      graph = graph.replace(relation.removeMembersWithID(memberID));
+	      var entity = graph.entity(memberID);
+
+	      if (canDeleteEntity(entity, graph)) {
+	        graph = actionDeleteMultiple([memberID])(graph);
+	      }
+	    });
+	    return graph.remove(relation);
+	  };
 
-	        } else { calcBBox(path[i], this.toBBox); }
-	    }
-	};
+	  return action;
+	}
 
-	function findItem(item, items, equalsFn) {
-	    if (!equalsFn) { return items.indexOf(item); }
+	function actionDeleteNode(nodeId) {
+	  var action = function action(graph) {
+	    var node = graph.entity(nodeId);
+	    graph.parentWays(node).forEach(function (parent) {
+	      parent = parent.removeNode(nodeId);
+	      graph = graph.replace(parent);
+
+	      if (parent.isDegenerate()) {
+	        graph = actionDeleteWay(parent.id)(graph);
+	      }
+	    });
+	    graph.parentRelations(node).forEach(function (parent) {
+	      parent = parent.removeMembersWithID(nodeId);
+	      graph = graph.replace(parent);
 
-	    for (var i = 0; i < items.length; i++) {
-	        if (equalsFn(item, items[i])) { return i; }
-	    }
-	    return -1;
-	}
+	      if (parent.isDegenerate()) {
+	        graph = actionDeleteRelation(parent.id)(graph);
+	      }
+	    });
+	    return graph.remove(node);
+	  };
 
-	// calculate node's bbox from bboxes of its children
-	function calcBBox(node, toBBox) {
-	    distBBox(node, 0, node.children.length, toBBox, node);
+	  return action;
 	}
 
-	// min bounding rectangle of node children from k to p-1
-	function distBBox(node, k, p, toBBox, destNode) {
-	    if (!destNode) { destNode = createNode(null); }
-	    destNode.minX = Infinity;
-	    destNode.minY = Infinity;
-	    destNode.maxX = -Infinity;
-	    destNode.maxY = -Infinity;
+	//
+	// First choose a node to be the survivor, with preference given
+	// to the oldest existing (not new) and "interesting" node.
+	//
+	// Tags and relation memberships of of non-surviving nodes are merged
+	// to the survivor.
+	//
+	// This is the inverse of `iD.actionDisconnect`.
+	//
+	// Reference:
+	//   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeNodesAction.as
+	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/MergeNodesAction.java
+	//
 
-	    for (var i = k; i < p; i++) {
-	        var child = node.children[i];
-	        extend$1(destNode, node.leaf ? toBBox(child) : child);
-	    }
+	function actionConnect(nodeIDs) {
+	  var action = function action(graph) {
+	    var survivor;
+	    var node;
+	    var parents;
+	    var i, j; // Select the node with the ID passed as parameter if it is in the list,
+	    // otherwise select the node with the oldest ID as the survivor, or the
+	    // last one if there are only new nodes.
 
-	    return destNode;
-	}
+	    nodeIDs.reverse();
+	    var interestingIDs = [];
 
-	function extend$1(a, b) {
-	    a.minX = Math.min(a.minX, b.minX);
-	    a.minY = Math.min(a.minY, b.minY);
-	    a.maxX = Math.max(a.maxX, b.maxX);
-	    a.maxY = Math.max(a.maxY, b.maxY);
-	    return a;
-	}
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      node = graph.entity(nodeIDs[i]);
 
-	function compareNodeMinX(a, b) { return a.minX - b.minX; }
-	function compareNodeMinY(a, b) { return a.minY - b.minY; }
+	      if (node.hasInterestingTags()) {
+	        if (!node.isNew()) {
+	          interestingIDs.push(node.id);
+	        }
+	      }
+	    }
 
-	function bboxArea(a)   { return (a.maxX - a.minX) * (a.maxY - a.minY); }
-	function bboxMargin(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }
+	    survivor = graph.entity(utilOldestID(interestingIDs.length > 0 ? interestingIDs : nodeIDs)); // Replace all non-surviving nodes with the survivor and merge tags.
 
-	function enlargedArea(a, b) {
-	    return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) *
-	           (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
-	}
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      node = graph.entity(nodeIDs[i]);
+	      if (node.id === survivor.id) continue;
+	      parents = graph.parentWays(node);
 
-	function intersectionArea(a, b) {
-	    var minX = Math.max(a.minX, b.minX);
-	    var minY = Math.max(a.minY, b.minY);
-	    var maxX = Math.min(a.maxX, b.maxX);
-	    var maxY = Math.min(a.maxY, b.maxY);
+	      for (j = 0; j < parents.length; j++) {
+	        graph = graph.replace(parents[j].replaceNode(node.id, survivor.id));
+	      }
 
-	    return Math.max(0, maxX - minX) *
-	           Math.max(0, maxY - minY);
-	}
+	      parents = graph.parentRelations(node);
 
-	function contains$1(a, b) {
-	    return a.minX <= b.minX &&
-	           a.minY <= b.minY &&
-	           b.maxX <= a.maxX &&
-	           b.maxY <= a.maxY;
-	}
+	      for (j = 0; j < parents.length; j++) {
+	        graph = graph.replace(parents[j].replaceMember(node, survivor));
+	      }
 
-	function intersects(a, b) {
-	    return b.minX <= a.maxX &&
-	           b.minY <= a.maxY &&
-	           b.maxX >= a.minX &&
-	           b.maxY >= a.minY;
-	}
+	      survivor = survivor.mergeTags(node.tags);
+	      graph = actionDeleteNode(node.id)(graph);
+	    }
 
-	function createNode(children) {
-	    return {
-	        children: children,
-	        height: 1,
-	        leaf: true,
-	        minX: Infinity,
-	        minY: Infinity,
-	        maxX: -Infinity,
-	        maxY: -Infinity
-	    };
-	}
+	    graph = graph.replace(survivor); // find and delete any degenerate ways created by connecting adjacent vertices
 
-	// sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
-	// combines selection algorithm with binary divide & conquer approach
+	    parents = graph.parentWays(survivor);
 
-	function multiSelect(arr, left, right, n, compare) {
-	    var stack = [left, right];
+	    for (i = 0; i < parents.length; i++) {
+	      if (parents[i].isDegenerate()) {
+	        graph = actionDeleteWay(parents[i].id)(graph);
+	      }
+	    }
 
-	    while (stack.length) {
-	        right = stack.pop();
-	        left = stack.pop();
+	    return graph;
+	  };
 
-	        if (right - left <= n) { continue; }
+	  action.disabled = function (graph) {
+	    var seen = {};
+	    var restrictionIDs = [];
+	    var survivor;
+	    var node, way;
+	    var relations, relation, role;
+	    var i, j, k; // Select the node with the oldest ID as the survivor.
 
-	        var mid = left + Math.ceil((right - left) / n / 2) * n;
-	        quickselect(arr, mid, left, right, compare);
+	    survivor = graph.entity(utilOldestID(nodeIDs)); // 1. disable if the nodes being connected have conflicting relation roles
 
-	        stack.push(left, mid, mid, right);
-	    }
-	}
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      node = graph.entity(nodeIDs[i]);
+	      relations = graph.parentRelations(node);
 
-	var tiler = utilTiler();
-	var dispatch$1 = dispatch('loaded');
-	var _tileZoom = 14;
-	var _krUrlRoot = 'https://www.keepright.at';
-	var _krData = { errorTypes: {}, localizeStrings: {} };
+	      for (j = 0; j < relations.length; j++) {
+	        relation = relations[j];
+	        role = relation.memberById(node.id).role || ''; // if this node is a via node in a restriction, remember for later
 
-	// This gets reassigned if reset
-	var _cache;
+	        if (relation.hasFromViaTo()) {
+	          restrictionIDs.push(relation.id);
+	        }
 
-	var _krRuleset = [
-	  // no 20 - multiple node on same spot - these are mostly boundaries overlapping roads
-	  30, 40, 50, 60, 70, 90, 100, 110, 120, 130, 150, 160, 170, 180,
-	  190, 191, 192, 193, 194, 195, 196, 197, 198,
-	  200, 201, 202, 203, 204, 205, 206, 207, 208, 210, 220,
-	  230, 231, 232, 270, 280, 281, 282, 283, 284, 285,
-	  290, 291, 292, 293, 294, 295, 296, 297, 298, 300, 310, 311, 312, 313,
-	  320, 350, 360, 370, 380, 390, 400, 401, 402, 410, 411, 412, 413
-	];
+	        if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
+	          return 'relation';
+	        } else {
+	          seen[relation.id] = role;
+	        }
+	      }
+	    } // gather restrictions for parent ways
 
 
-	function abortRequest(controller) {
-	  if (controller) {
-	    controller.abort();
-	  }
-	}
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      node = graph.entity(nodeIDs[i]);
+	      var parents = graph.parentWays(node);
 
-	function abortUnwantedRequests(cache, tiles) {
-	  Object.keys(cache.inflightTile).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) { return k === tile.id; });
-	    if (!wanted) {
-	      abortRequest(cache.inflightTile[k]);
-	      delete cache.inflightTile[k];
-	    }
-	  });
-	}
+	      for (j = 0; j < parents.length; j++) {
+	        var parent = parents[j];
+	        relations = graph.parentRelations(parent);
 
+	        for (k = 0; k < relations.length; k++) {
+	          relation = relations[k];
 
-	function encodeIssueRtree(d) {
-	  return { minX: d.loc[0], minY: d.loc[1], maxX: d.loc[0], maxY: d.loc[1], data: d };
-	}
+	          if (relation.hasFromViaTo()) {
+	            restrictionIDs.push(relation.id);
+	          }
+	        }
+	      }
+	    } // test restrictions
 
 
-	// Replace or remove QAItem from rtree
-	function updateRtree(item, replace) {
-	  _cache.rtree.remove(item, function (a, b) { return a.data.id === b.data.id; });
+	    restrictionIDs = utilArrayUniq(restrictionIDs);
 
-	  if (replace) {
-	    _cache.rtree.insert(item);
-	  }
-	}
+	    for (i = 0; i < restrictionIDs.length; i++) {
+	      relation = graph.entity(restrictionIDs[i]);
+	      if (!relation.isComplete(graph)) continue;
+	      var memberWays = relation.members.filter(function (m) {
+	        return m.type === 'way';
+	      }).map(function (m) {
+	        return graph.entity(m.id);
+	      });
+	      memberWays = utilArrayUniq(memberWays);
+	      var f = relation.memberByRole('from');
+	      var t = relation.memberByRole('to');
+	      var isUturn = f.id === t.id; // 2a. disable if connection would damage a restriction
+	      // (a key node is a node at the junction of ways)
+
+	      var nodes = {
+	        from: [],
+	        via: [],
+	        to: [],
+	        keyfrom: [],
+	        keyto: []
+	      };
 
+	      for (j = 0; j < relation.members.length; j++) {
+	        collectNodes(relation.members[j], nodes);
+	      }
 
-	function tokenReplacements(d) {
-	  if (!(d instanceof QAItem)) { return; }
+	      nodes.keyfrom = utilArrayUniq(nodes.keyfrom.filter(hasDuplicates));
+	      nodes.keyto = utilArrayUniq(nodes.keyto.filter(hasDuplicates));
+	      var filter = keyNodeFilter(nodes.keyfrom, nodes.keyto);
+	      nodes.from = nodes.from.filter(filter);
+	      nodes.via = nodes.via.filter(filter);
+	      nodes.to = nodes.to.filter(filter);
+	      var connectFrom = false;
+	      var connectVia = false;
+	      var connectTo = false;
+	      var connectKeyFrom = false;
+	      var connectKeyTo = false;
 
-	  var htmlRegex = new RegExp(/<\/[a-z][\s\S]*>/);
-	  var replacements = {};
+	      for (j = 0; j < nodeIDs.length; j++) {
+	        var n = nodeIDs[j];
 
-	  var issueTemplate = _krData.errorTypes[d.whichType];
-	  if (!issueTemplate) {
-	    /* eslint-disable no-console */
-	    console.log('No Template: ', d.whichType);
-	    console.log('  ', d.description);
-	    /* eslint-enable no-console */
-	    return;
-	  }
+	        if (nodes.from.indexOf(n) !== -1) {
+	          connectFrom = true;
+	        }
 
-	  // some descriptions are just fixed text
-	  if (!issueTemplate.regex) { return; }
+	        if (nodes.via.indexOf(n) !== -1) {
+	          connectVia = true;
+	        }
 
-	  // regex pattern should match description with variable details captured
-	  var errorRegex = new RegExp(issueTemplate.regex, 'i');
-	  var errorMatch = errorRegex.exec(d.description);
-	  if (!errorMatch) {
-	    /* eslint-disable no-console */
-	    console.log('Unmatched: ', d.whichType);
-	    console.log('  ', d.description);
-	    console.log('  ', errorRegex);
-	    /* eslint-enable no-console */
-	    return;
-	  }
+	        if (nodes.to.indexOf(n) !== -1) {
+	          connectTo = true;
+	        }
 
-	  for (var i = 1; i < errorMatch.length; i++) {   // skip first
-	    var capture = errorMatch[i];
-	    var idType = (void 0);
+	        if (nodes.keyfrom.indexOf(n) !== -1) {
+	          connectKeyFrom = true;
+	        }
 
-	    idType = 'IDs' in issueTemplate ? issueTemplate.IDs[i-1] : '';
-	    if (idType && capture) {   // link IDs if present in the capture
-	      capture = parseError(capture, idType);
-	    } else if (htmlRegex.test(capture)) {   // escape any html in non-IDs
-	      capture = '\\' +  capture + '\\';
-	    } else {
-	      var compare = capture.toLowerCase();
-	      if (_krData.localizeStrings[compare]) {   // some replacement strings can be localized
-	        capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+	        if (nodes.keyto.indexOf(n) !== -1) {
+	          connectKeyTo = true;
+	        }
 	      }
-	    }
 
-	    replacements['var' + i] = capture;
-	  }
+	      if (connectFrom && connectTo && !isUturn) {
+	        return 'restriction';
+	      }
 
-	  return replacements;
-	}
+	      if (connectFrom && connectVia) {
+	        return 'restriction';
+	      }
 
+	      if (connectTo && connectVia) {
+	        return 'restriction';
+	      } // connecting to a key node -
+	      // if both nodes are on a member way (i.e. part of the turn restriction),
+	      // the connecting node must be adjacent to the key node.
 
-	function parseError(capture, idType) {
-	  var compare = capture.toLowerCase();
-	  if (_krData.localizeStrings[compare]) {   // some replacement strings can be localized
-	    capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
-	  }
 
-	  switch (idType) {
-	    // link a string like "this node"
-	    case 'this':
-	      capture = linkErrorObject(capture);
-	      break;
+	      if (connectKeyFrom || connectKeyTo) {
+	        if (nodeIDs.length !== 2) {
+	          return 'restriction';
+	        }
 
-	    case 'url':
-	      capture = linkURL(capture);
-	      break;
+	        var n0 = null;
+	        var n1 = null;
 
-	    // link an entity ID
-	    case 'n':
-	    case 'w':
-	    case 'r':
-	      capture = linkEntity(idType + capture);
-	      break;
+	        for (j = 0; j < memberWays.length; j++) {
+	          way = memberWays[j];
 
-	    // some errors have more complex ID lists/variance
-	    case '20':
-	      capture = parse20(capture);
-	      break;
-	    case '211':
-	      capture = parse211(capture);
-	      break;
-	    case '231':
-	      capture = parse231(capture);
-	      break;
-	    case '294':
-	      capture = parse294(capture);
-	      break;
-	    case '370':
-	      capture = parse370(capture);
-	      break;
-	  }
+	          if (way.contains(nodeIDs[0])) {
+	            n0 = nodeIDs[0];
+	          }
 
-	  return capture;
+	          if (way.contains(nodeIDs[1])) {
+	            n1 = nodeIDs[1];
+	          }
+	        }
 
+	        if (n0 && n1) {
+	          // both nodes are part of the restriction
+	          var ok = false;
 
-	  function linkErrorObject(d) {
-	    return ("<a class=\"error_object_link\">" + d + "</a>");
-	  }
+	          for (j = 0; j < memberWays.length; j++) {
+	            way = memberWays[j];
 
-	  function linkEntity(d) {
-	    return ("<a class=\"error_entity_link\">" + d + "</a>");
-	  }
+	            if (way.areAdjacent(n0, n1)) {
+	              ok = true;
+	              break;
+	            }
+	          }
 
-	  function linkURL(d) {
-	    return ("<a class=\"kr_external_link\" target=\"_blank\" href=\"" + d + "\">" + d + "</a>");
-	  }
+	          if (!ok) {
+	            return 'restriction';
+	          }
+	        }
+	      } // 2b. disable if nodes being connected will destroy a member way in a restriction
+	      // (to test, make a copy and try actually connecting the nodes)
 
-	  // arbitrary node list of form: #ID, #ID, #ID...
-	  function parse211(capture) {
-	    var newList = [];
-	    var items = capture.split(', ');
 
-	    items.forEach(function (item) {
-	      // ID has # at the front
-	      var id = linkEntity('n' + item.slice(1));
-	      newList.push(id);
-	    });
+	      for (j = 0; j < memberWays.length; j++) {
+	        way = memberWays[j].update({}); // make copy
 
-	    return newList.join(', ');
-	  }
+	        for (k = 0; k < nodeIDs.length; k++) {
+	          if (nodeIDs[k] === survivor.id) continue;
 
-	  // arbitrary way list of form: #ID(layer),#ID(layer),#ID(layer)...
-	  function parse231(capture) {
-	    var newList = [];
-	    // unfortunately 'layer' can itself contain commas, so we split on '),'
-	    var items = capture.split('),');
+	          if (way.areAdjacent(nodeIDs[k], survivor.id)) {
+	            way = way.removeNode(nodeIDs[k]);
+	          } else {
+	            way = way.replaceNode(nodeIDs[k], survivor.id);
+	          }
+	        }
 
-	    items.forEach(function (item) {
-	      var match = item.match(/\#(\d+)\((.+)\)?/);
-	      if (match !== null && match.length > 2) {
-	        newList.push(linkEntity('w' + match[1]) + ' ' +
-	          _t('QA.keepRight.errorTypes.231.layer', { layer: match[2] })
-	        );
+	        if (way.isDegenerate()) {
+	          return 'restriction';
+	        }
 	      }
-	    });
-
-	    return newList.join(', ');
-	  }
+	    }
 
-	  // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #ID...
-	  function parse294(capture) {
-	    var newList = [];
-	    var items = capture.split(',');
+	    return false; // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction
 
-	    items.forEach(function (item) {
-	      // item of form "from/to node/relation #ID"
-	      item = item.split(' ');
+	    function hasDuplicates(n, i, arr) {
+	      return arr.indexOf(n) !== arr.lastIndexOf(n);
+	    }
 
-	      // to/from role is more clear in quotes
-	      var role = "\"" + (item[0]) + "\"";
+	    function keyNodeFilter(froms, tos) {
+	      return function (n) {
+	        return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
+	      };
+	    }
 
-	      // first letter of node/relation provides the type
-	      var idType = item[1].slice(0,1);
+	    function collectNodes(member, collection) {
+	      var entity = graph.hasEntity(member.id);
+	      if (!entity) return;
+	      var role = member.role || '';
 
-	      // ID has # at the front
-	      var id = item[2].slice(1);
-	      id = linkEntity(idType + id);
+	      if (!collection[role]) {
+	        collection[role] = [];
+	      }
 
-	      newList.push((role + " " + (item[1]) + " " + id));
-	    });
+	      if (member.type === 'node') {
+	        collection[role].push(member.id);
 
-	    return newList.join(', ');
-	  }
+	        if (role === 'via') {
+	          collection.keyfrom.push(member.id);
+	          collection.keyto.push(member.id);
+	        }
+	      } else if (member.type === 'way') {
+	        collection[role].push.apply(collection[role], entity.nodes);
 
-	  // may or may not include the string "(including the name 'name')"
-	  function parse370(capture) {
-	    if (!capture) { return ''; }
+	        if (role === 'from' || role === 'via') {
+	          collection.keyfrom.push(entity.first());
+	          collection.keyfrom.push(entity.last());
+	        }
 
-	    var match = capture.match(/\(including the name (\'.+\')\)/);
-	    if (match && match.length) {
-	      return _t('QA.keepRight.errorTypes.370.including_the_name', { name: match[1] });
+	        if (role === 'to' || role === 'via') {
+	          collection.keyto.push(entity.first());
+	          collection.keyto.push(entity.last());
+	        }
+	      }
 	    }
-	    return '';
-	  }
+	  };
 
-	  // arbitrary node list of form: #ID,#ID,#ID...
-	  function parse20(capture) {
-	    var newList = [];
-	    var items = capture.split(',');
+	  return action;
+	}
 
-	    items.forEach(function (item) {
-	      // ID has # at the front
-	      var id = linkEntity('n' + item.slice(1));
-	      newList.push(id);
+	function actionCopyEntities(ids, fromGraph) {
+	  var _copies = {};
+
+	  var action = function action(graph) {
+	    ids.forEach(function (id) {
+	      fromGraph.entity(id).copy(fromGraph, _copies);
 	    });
 
-	    return newList.join(', ');
-	  }
-	}
+	    for (var id in _copies) {
+	      graph = graph.replace(_copies[id]);
+	    }
 
+	    return graph;
+	  };
 
-	var serviceKeepRight = {
-	  title: 'keepRight',
+	  action.copies = function () {
+	    return _copies;
+	  };
 
-	  init: function init() {
-	    _mainFileFetcher.get('keepRight')
-	      .then(function (d) { return _krData = d; });
+	  return action;
+	}
 
-	    if (!_cache) {
-	      this.reset();
+	function actionDeleteMember(relationId, memberIndex) {
+	  return function (graph) {
+	    var relation = graph.entity(relationId).removeMember(memberIndex);
+	    graph = graph.replace(relation);
+
+	    if (relation.isDegenerate()) {
+	      graph = actionDeleteRelation(relation.id)(graph);
 	    }
 
-	    this.event = utilRebind(this, dispatch$1, 'on');
-	  },
+	    return graph;
+	  };
+	}
 
-	  reset: function reset() {
-	    if (_cache) {
-	      Object.values(_cache.inflightTile).forEach(abortRequest);
-	    }
+	function actionDiscardTags(difference, discardTags) {
+	  discardTags = discardTags || {};
+	  return function (graph) {
+	    difference.modified().forEach(checkTags);
+	    difference.created().forEach(checkTags);
+	    return graph;
 
-	    _cache = {
-	      data: {},
-	      loadedTile: {},
-	      inflightTile: {},
-	      inflightPost: {},
-	      closed: {},
-	      rtree: new RBush()
-	    };
-	  },
+	    function checkTags(entity) {
+	      var keys = Object.keys(entity.tags);
+	      var didDiscard = false;
+	      var tags = {};
 
+	      for (var i = 0; i < keys.length; i++) {
+	        var k = keys[i];
 
-	  // KeepRight API:  http://osm.mueschelsoft.de/keepright/interfacing.php
-	  loadIssues: function loadIssues(projection) {
-	    var this$1 = this;
+	        if (discardTags[k] || !entity.tags[k]) {
+	          didDiscard = true;
+	        } else {
+	          tags[k] = entity.tags[k];
+	        }
+	      }
 
-	    var options = {
-	      format: 'geojson',
-	      ch: _krRuleset
-	    };
+	      if (didDiscard) {
+	        graph = graph.replace(entity.update({
+	          tags: tags
+	        }));
+	      }
+	    }
+	  };
+	}
+
+	//
+	// Optionally, disconnect only the given ways.
+	//
+	// For testing convenience, accepts an ID to assign to the (first) new node.
+	// Normally, this will be undefined and the way will automatically
+	// be assigned a new ID.
+	//
+	// This is the inverse of `iD.actionConnect`.
+	//
+	// Reference:
+	//   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/UnjoinNodeAction.as
+	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/UnGlueAction.java
+	//
+
+	function actionDisconnect(nodeId, newNodeId) {
+	  var wayIds;
+	  var disconnectableRelationTypes = {
+	    'associatedStreet': true,
+	    'enforcement': true,
+	    'site': true
+	  };
+
+	  var action = function action(graph) {
+	    var node = graph.entity(nodeId);
+	    var connections = action.connections(graph);
+	    connections.forEach(function (connection) {
+	      var way = graph.entity(connection.wayID);
+	      var newNode = osmNode({
+	        id: newNodeId,
+	        loc: node.loc,
+	        tags: node.tags
+	      });
+	      graph = graph.replace(newNode);
+
+	      if (connection.index === 0 && way.isArea()) {
+	        // replace shared node with shared node..
+	        graph = graph.replace(way.replaceNode(way.nodes[0], newNode.id));
+	      } else if (way.isClosed() && connection.index === way.nodes.length - 1) {
+	        // replace closing node with new new node..
+	        graph = graph.replace(way.unclose().addNode(newNode.id));
+	      } else {
+	        // replace shared node with multiple new nodes..
+	        graph = graph.replace(way.updateNode(newNode.id, connection.index));
+	      }
+	    });
+	    return graph;
+	  };
 
-	    // determine the needed tiles to cover the view
-	    var tiles = tiler
-	      .zoomExtent([_tileZoom, _tileZoom])
-	      .getTiles(projection);
+	  action.connections = function (graph) {
+	    var candidates = [];
+	    var keeping = false;
+	    var parentWays = graph.parentWays(graph.entity(nodeId));
+	    var way, waynode;
 
-	    // abort inflight requests that are no longer needed
-	    abortUnwantedRequests(_cache, tiles);
+	    for (var i = 0; i < parentWays.length; i++) {
+	      way = parentWays[i];
 
-	    // issue new requests..
-	    tiles.forEach(function (tile) {
-	      if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) { return; }
-
-	      var ref = tile.extent.rectangle();
-	      var left = ref[0];
-	      var top = ref[1];
-	      var right = ref[2];
-	      var bottom = ref[3];
-	      var params = Object.assign({}, options, { left: left, bottom: bottom, right: right, top: top });
-	      var url = _krUrlRoot + "/export.php?" + utilQsString(params);
-	      var controller = new AbortController();
+	      if (wayIds && wayIds.indexOf(way.id) === -1) {
+	        keeping = true;
+	        continue;
+	      }
 
-	      _cache.inflightTile[tile.id] = controller;
+	      if (way.isArea() && way.nodes[0] === nodeId) {
+	        candidates.push({
+	          wayID: way.id,
+	          index: 0
+	        });
+	      } else {
+	        for (var j = 0; j < way.nodes.length; j++) {
+	          waynode = way.nodes[j];
 
-	      d3_json(url, { signal: controller.signal })
-	        .then(function (data) {
-	          delete _cache.inflightTile[tile.id];
-	          _cache.loadedTile[tile.id] = true;
-	          if (!data || !data.features || !data.features.length) {
-	            throw new Error('No Data');
-	          }
-
-	          data.features.forEach(function (feature) {
-	            var feature_properties = feature.properties;
-	            var itemType = feature_properties.error_type;
-	            var id = feature_properties.error_id;
-	            var comment = feature_properties.comment; if ( comment === void 0 ) comment = null;
-	            var objectId = feature_properties.object_id;
-	            var objectType = feature_properties.object_type;
-	            var schema = feature_properties.schema;
-	            var title = feature_properties.title;
-	            var loc = feature.geometry.coordinates;
-	            var description = feature.properties.description; if ( description === void 0 ) description = '';
-
-	            // if there is a parent, save its error type e.g.:
-	            //  Error 191 = "highway-highway"
-	            //  Error 190 = "intersections without junctions"  (parent)
-	            var issueTemplate = _krData.errorTypes[itemType];
-	            var parentIssueType = (Math.floor(itemType / 10) * 10).toString();
-
-	            // try to handle error type directly, fallback to parent error type.
-	            var whichType = issueTemplate ? itemType : parentIssueType;
-	            var whichTemplate = _krData.errorTypes[whichType];
-
-	            // Rewrite a few of the errors at this point..
-	            // This is done to make them easier to linkify and translate.
-	            switch (whichType) {
-	              case '170':
-	                description = "This feature has a FIXME tag: " + description;
-	                break;
-	              case '292':
-	              case '293':
-	                description = description.replace('A turn-', 'This turn-');
-	                break;
-	              case '294':
-	              case '295':
-	              case '296':
-	              case '297':
-	              case '298':
-	                description = "This turn-restriction~" + description;
-	                break;
-	              case '300':
-	                description = 'This highway is missing a maxspeed tag';
-	                break;
-	              case '411':
-	              case '412':
-	              case '413':
-	                description = "This feature~" + description;
-	                break;
+	          if (waynode === nodeId) {
+	            if (way.isClosed() && parentWays.length > 1 && wayIds && wayIds.indexOf(way.id) !== -1 && j === way.nodes.length - 1) {
+	              continue;
 	            }
 
-	            // move markers slightly so it doesn't obscure the geometry,
-	            // then move markers away from other coincident markers
-	            var coincident = false;
-	            do {
-	              // first time, move marker up. after that, move marker right.
-	              var delta = coincident ? [0.00001, 0] : [0, 0.00001];
-	              loc = geoVecAdd(loc, delta);
-	              var bbox = geoExtent(loc).bbox();
-	              coincident = _cache.rtree.search(bbox).length;
-	            } while (coincident);
-
-	            var d = new QAItem(loc, this$1, itemType, id, {
-	              comment: comment,
-	              description: description,
-	              whichType: whichType,
-	              parentIssueType: parentIssueType,
-	              severity: whichTemplate.severity || 'error',
-	              objectId: objectId,
-	              objectType: objectType,
-	              schema: schema,
-	              title: title
+	            candidates.push({
+	              wayID: way.id,
+	              index: j
 	            });
+	          }
+	        }
+	      }
+	    }
 
-	            d.replacements = tokenReplacements(d);
-
-	            _cache.data[id] = d;
-	            _cache.rtree.insert(encodeIssueRtree(d));
-	          });
-
-	          dispatch$1.call('loaded');
-	        })
-	        .catch(function () {
-	          delete _cache.inflightTile[tile.id];
-	          _cache.loadedTile[tile.id] = true;
-	        });
+	    return keeping ? candidates : candidates.slice(1);
+	  };
 
+	  action.disabled = function (graph) {
+	    var connections = action.connections(graph);
+	    if (connections.length === 0) return 'not_connected';
+	    var parentWays = graph.parentWays(graph.entity(nodeId));
+	    var seenRelationIds = {};
+	    var sharedRelation;
+	    parentWays.forEach(function (way) {
+	      var relations = graph.parentRelations(way);
+	      relations.filter(function (relation) {
+	        return !disconnectableRelationTypes[relation.tags.type];
+	      }).forEach(function (relation) {
+	        if (relation.id in seenRelationIds) {
+	          if (wayIds) {
+	            if (wayIds.indexOf(way.id) !== -1 || wayIds.indexOf(seenRelationIds[relation.id]) !== -1) {
+	              sharedRelation = relation;
+	            }
+	          } else {
+	            sharedRelation = relation;
+	          }
+	        } else {
+	          seenRelationIds[relation.id] = way.id;
+	        }
+	      });
 	    });
-	  },
+	    if (sharedRelation) return 'relation';
+	  };
 
+	  action.limitWays = function (val) {
+	    if (!arguments.length) return wayIds;
+	    wayIds = val;
+	    return action;
+	  };
 
-	  postUpdate: function postUpdate(d, callback) {
-	    var this$1 = this;
+	  return action;
+	}
 
-	    if (_cache.inflightPost[d.id]) {
-	      return callback({ message: 'Error update already inflight', status: -2 }, d);
-	    }
+	function actionExtract(entityID, projection) {
+	  var extractedNodeID;
 
-	    var params = { schema: d.schema, id: d.id };
+	  var action = function action(graph) {
+	    var entity = graph.entity(entityID);
 
-	    if (d.newStatus) {
-	      params.st = d.newStatus;
-	    }
-	    if (d.newComment !== undefined) {
-	      params.co = d.newComment;
+	    if (entity.type === 'node') {
+	      return extractFromNode(entity, graph);
 	    }
 
-	    // NOTE: This throws a CORS err, but it seems successful.
-	    // We don't care too much about the response, so this is fine.
-	    var url = _krUrlRoot + "/comment.php?" + utilQsString(params);
-	    var controller = new AbortController();
+	    return extractFromWayOrRelation(entity, graph);
+	  };
 
-	    _cache.inflightPost[d.id] = controller;
+	  function extractFromNode(node, graph) {
+	    extractedNodeID = node.id; // Create a new node to replace the one we will detach
 
-	    // Since this is expected to throw an error just continue as if it worked
-	    // (worst case scenario the request truly fails and issue will show up if iD restarts)
-	    d3_json(url, { signal: controller.signal })
-	      .finally(function () {
-	        delete _cache.inflightPost[d.id];
-
-	        if (d.newStatus === 'ignore') {
-	          // ignore permanently (false positive)
-	          this$1.removeItem(d);
-	        } else if (d.newStatus === 'ignore_t') {
-	          // ignore temporarily (error fixed)
-	          this$1.removeItem(d);
-	          _cache.closed[((d.schema) + ":" + (d.id))] = true;
-	        } else {
-	          d = this$1.replaceItem(d.update({
-	            comment: d.newComment,
-	            newComment: undefined,
-	            newState: undefined
-	          }));
-	        }
+	    var replacement = osmNode({
+	      loc: node.loc
+	    });
+	    graph = graph.replace(replacement); // Process each way in turn, updating the graph as we go
 
-	        if (callback) { callback(null, d); }
-	      });
-	  },
+	    graph = graph.parentWays(node).reduce(function (accGraph, parentWay) {
+	      return accGraph.replace(parentWay.replaceNode(entityID, replacement.id));
+	    }, graph); // Process any relations too
 
-	  // Get all cached QAItems covering the viewport
-	  getItems: function getItems(projection) {
-	    var viewport = projection.clipExtent();
-	    var min = [viewport[0][0], viewport[1][1]];
-	    var max = [viewport[1][0], viewport[0][1]];
-	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    return graph.parentRelations(node).reduce(function (accGraph, parentRel) {
+	      return accGraph.replace(parentRel.replaceMember(node, replacement));
+	    }, graph);
+	  }
 
-	    return _cache.rtree.search(bbox).map(function (d) { return d.data; });
-	  },
+	  function extractFromWayOrRelation(entity, graph) {
+	    var fromGeometry = entity.geometry(graph);
+	    var keysToCopyAndRetain = ['source', 'wheelchair'];
+	    var keysToRetain = ['area'];
+	    var buildingKeysToRetain = ['architect', 'building', 'height', 'layer'];
+	    var extractedLoc = d3_geoPath(projection).centroid(entity.asGeoJSON(graph));
+	    extractedLoc = extractedLoc && projection.invert(extractedLoc);
 
-	  // Get a QAItem from cache
-	  // NOTE: Don't change method name until UI v3 is merged
-	  getError: function getError(id) {
-	    return _cache.data[id];
-	  },
+	    if (!extractedLoc || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
+	      extractedLoc = entity.extent(graph).center();
+	    }
 
-	  // Replace a single QAItem in the cache
-	  replaceItem: function replaceItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) { return; }
+	    var indoorAreaValues = {
+	      area: true,
+	      corridor: true,
+	      elevator: true,
+	      level: true,
+	      room: true
+	    };
+	    var isBuilding = entity.tags.building && entity.tags.building !== 'no' || entity.tags['building:part'] && entity.tags['building:part'] !== 'no';
+	    var isIndoorArea = fromGeometry === 'area' && entity.tags.indoor && indoorAreaValues[entity.tags.indoor];
+	    var entityTags = Object.assign({}, entity.tags); // shallow copy
 
-	    _cache.data[item.id] = item;
-	    updateRtree(encodeIssueRtree(item), true); // true = replace
-	    return item;
-	  },
+	    var pointTags = {};
 
-	  // Remove a single QAItem from the cache
-	  removeItem: function removeItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) { return; }
+	    for (var key in entityTags) {
+	      if (entity.type === 'relation' && key === 'type') {
+	        continue;
+	      }
 
-	    delete _cache.data[item.id];
-	    updateRtree(encodeIssueRtree(item), false); // false = remove
-	  },
+	      if (keysToRetain.indexOf(key) !== -1) {
+	        continue;
+	      }
 
-	  issueURL: function issueURL(item) {
-	    return (_krUrlRoot + "/report_map.php?schema=" + (item.schema) + "&error=" + (item.id));
-	  },
+	      if (isBuilding) {
+	        // don't transfer building-related tags
+	        if (buildingKeysToRetain.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
+	      } // leave `indoor` tag on the area
 
-	  // Get an array of issues closed during this session.
-	  // Used to populate `closed:keepright` changeset tag
-	  getClosedIDs: function getClosedIDs() {
-	    return Object.keys(_cache.closed).sort();
-	  }
 
-	};
+	      if (isIndoorArea && key === 'indoor') {
+	        continue;
+	      } // copy the tag from the entity to the point
 
-	var tiler$1 = utilTiler();
-	var dispatch$2 = dispatch('loaded');
-	var _tileZoom$1 = 14;
-	var _impOsmUrls = {
-	  ow: 'https://grab.community.improve-osm.org/directionOfFlowService',
-	  mr: 'https://grab.community.improve-osm.org/missingGeoService',
-	  tr: 'https://grab.community.improve-osm.org/turnRestrictionService'
-	};
-	var _impOsmData = { icons: {} };
 
+	      pointTags[key] = entityTags[key]; // leave addresses and some other tags so they're on both features
 
-	// This gets reassigned if reset
-	var _cache$1;
+	      if (keysToCopyAndRetain.indexOf(key) !== -1 || key.match(/^addr:.{1,}/)) {
+	        continue;
+	      } else if (isIndoorArea && key === 'level') {
+	        // leave `level` on both features
+	        continue;
+	      } // remove the tag from the entity
 
-	function abortRequest$1(i) {
-	  Object.values(i).forEach(function (controller) {
-	    if (controller) {
-	      controller.abort();
-	    }
-	  });
-	}
 
-	function abortUnwantedRequests$1(cache, tiles) {
-	  Object.keys(cache.inflightTile).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) { return k === tile.id; });
-	    if (!wanted) {
-	      abortRequest$1(cache.inflightTile[k]);
-	      delete cache.inflightTile[k];
+	      delete entityTags[key];
 	    }
-	  });
-	}
-
-	function encodeIssueRtree$1(d) {
-	  return { minX: d.loc[0], minY: d.loc[1], maxX: d.loc[0], maxY: d.loc[1], data: d };
-	}
 
-	// Replace or remove QAItem from rtree
-	function updateRtree$1(item, replace) {
-	  _cache$1.rtree.remove(item, function (a, b) { return a.data.id === b.data.id; });
+	    if (!isBuilding && !isIndoorArea && fromGeometry === 'area') {
+	      // ensure that areas keep area geometry
+	      entityTags.area = 'yes';
+	    }
 
-	  if (replace) {
-	    _cache$1.rtree.insert(item);
+	    var replacement = osmNode({
+	      loc: extractedLoc,
+	      tags: pointTags
+	    });
+	    graph = graph.replace(replacement);
+	    extractedNodeID = replacement.id;
+	    return graph.replace(entity.update({
+	      tags: entityTags
+	    }));
 	  }
-	}
 
-	function linkErrorObject(d) {
-	  return ("<a class=\"error_object_link\">" + d + "</a>");
-	}
+	  action.getExtractedNodeID = function () {
+	    return extractedNodeID;
+	  };
 
-	function linkEntity(d) {
-	  return ("<a class=\"error_entity_link\">" + d + "</a>");
+	  return action;
 	}
 
-	function pointAverage(points) {
-	  if (points.length) {
-	    var sum = points.reduce(
-	      function (acc, point) { return geoVecAdd(acc, [point.lon, point.lat]); },
-	      [0,0]
-	    );
-	    return geoVecScale(sum, 1 / points.length);
-	  } else {
-	    return [0,0];
-	  }
-	}
+	//
+	// This is the inverse of `iD.actionSplit`.
+	//
+	// Reference:
+	//   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeWaysAction.as
+	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/CombineWayAction.java
+	//
 
-	function relativeBearing(p1, p2) {
-	  var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);
-	  if (angle < 0) {
-	    angle += 2 * Math.PI;
-	  }
+	function actionJoin(ids) {
+	  function groupEntitiesByGeometry(graph) {
+	    var entities = ids.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    return Object.assign({
+	      line: []
+	    }, utilArrayGroupBy(entities, function (entity) {
+	      return entity.geometry(graph);
+	    }));
+	  }
+
+	  var action = function action(graph) {
+	    var ways = ids.map(graph.entity, graph); // Prefer to keep an existing way.
+	    // if there are multiple existing ways, keep the oldest one
+	    // the oldest way is determined by the ID of the way.
+
+	    var survivorID = utilOldestID(ways.map(function (way) {
+	      return way.id;
+	    })); // if any of the ways are sided (e.g. coastline, cliff, kerb)
+	    // sort them first so they establish the overall order - #6033
+
+	    ways.sort(function (a, b) {
+	      var aSided = a.isSided();
+	      var bSided = b.isSided();
+	      return aSided && !bSided ? -1 : bSided && !aSided ? 1 : 0;
+	    });
+	    var sequences = osmJoinWays(ways, graph);
+	    var joined = sequences[0]; // We might need to reverse some of these ways before joining them.  #4688
+	    // `joined.actions` property will contain any actions we need to apply.
+
+	    graph = sequences.actions.reduce(function (g, action) {
+	      return action(g);
+	    }, graph);
+	    var survivor = graph.entity(survivorID);
+	    survivor = survivor.update({
+	      nodes: joined.nodes.map(function (n) {
+	        return n.id;
+	      })
+	    });
+	    graph = graph.replace(survivor);
+	    joined.forEach(function (way) {
+	      if (way.id === survivorID) return;
+	      graph.parentRelations(way).forEach(function (parent) {
+	        graph = graph.replace(parent.replaceMember(way, survivor));
+	      });
+	      survivor = survivor.mergeTags(way.tags);
+	      graph = graph.replace(survivor);
+	      graph = actionDeleteWay(way.id)(graph);
+	    }); // Finds if the join created a single-member multipolygon,
+	    // and if so turns it into a basic area instead
+
+	    function checkForSimpleMultipolygon() {
+	      if (!survivor.isClosed()) return;
+	      var multipolygons = graph.parentMultipolygons(survivor).filter(function (multipolygon) {
+	        // find multipolygons where the survivor is the only member
+	        return multipolygon.members.length === 1;
+	      }); // skip if this is the single member of multiple multipolygons
+
+	      if (multipolygons.length !== 1) return;
+	      var multipolygon = multipolygons[0];
+
+	      for (var key in survivor.tags) {
+	        if (multipolygon.tags[key] && // don't collapse if tags cannot be cleanly merged
+	        multipolygon.tags[key] !== survivor.tags[key]) return;
+	      }
 
-	  // Return degrees
-	  return angle * 180 / Math.PI;
-	}
+	      survivor = survivor.mergeTags(multipolygon.tags);
+	      graph = graph.replace(survivor);
+	      graph = actionDeleteRelation(multipolygon.id, true
+	      /* allow untagged members */
+	      )(graph);
+	      var tags = Object.assign({}, survivor.tags);
 
-	// Assuming range [0,360)
-	function cardinalDirection(bearing) {
-	  var dir = 45 * Math.round(bearing / 45);
-	  var compass = {
-	    0: 'north',
-	    45: 'northeast',
-	    90: 'east',
-	    135: 'southeast',
-	    180: 'south',
-	    225: 'southwest',
-	    270: 'west',
-	    315: 'northwest',
-	    360: 'north'
-	  };
+	      if (survivor.geometry(graph) !== 'area') {
+	        // ensure the feature persists as an area
+	        tags.area = 'yes';
+	      }
 
-	  return _t(("QA.improveOSM.directions." + (compass[dir])));
-	}
+	      delete tags.type; // remove type=multipolygon
 
-	// Errors shouldn't obscure eachother
-	function preventCoincident(loc, bumpUp) {
-	  var coincident = false;
-	  do {
-	    // first time, move marker up. after that, move marker right.
-	    var delta = coincident ? [0.00001, 0] : (bumpUp ? [0, 0.00001] : [0, 0]);
-	    loc = geoVecAdd(loc, delta);
-	    var bbox = geoExtent(loc).bbox();
-	    coincident = _cache$1.rtree.search(bbox).length;
-	  } while (coincident);
+	      survivor = survivor.update({
+	        tags: tags
+	      });
+	      graph = graph.replace(survivor);
+	    }
 
-	  return loc;
-	}
+	    checkForSimpleMultipolygon();
+	    return graph;
+	  }; // Returns the number of nodes the resultant way is expected to have
 
-	var serviceImproveOSM = {
-	  title: 'improveOSM',
 
-	  init: function init() {
-	    _mainFileFetcher.get('qa_data')
-	      .then(function (d) { return _impOsmData = d.improveOSM; });
+	  action.resultingWayNodesLength = function (graph) {
+	    return ids.reduce(function (count, id) {
+	      return count + graph.entity(id).nodes.length;
+	    }, 0) - ids.length - 1;
+	  };
 
-	    if (!_cache$1) {
-	      this.reset();
+	  action.disabled = function (graph) {
+	    var geometries = groupEntitiesByGeometry(graph);
+
+	    if (ids.length < 2 || ids.length !== geometries.line.length) {
+	      return 'not_eligible';
 	    }
 
-	    this.event = utilRebind(this, dispatch$2, 'on');
-	  },
+	    var joined = osmJoinWays(ids.map(graph.entity, graph), graph);
 
-	  reset: function reset() {
-	    if (_cache$1) {
-	      Object.values(_cache$1.inflightTile).forEach(abortRequest$1);
+	    if (joined.length > 1) {
+	      return 'not_adjacent';
 	    }
-	    _cache$1 = {
-	      data: {},
-	      loadedTile: {},
-	      inflightTile: {},
-	      inflightPost: {},
-	      closed: {},
-	      rtree: new RBush()
-	    };
-	  },
 
-	  loadIssues: function loadIssues(projection) {
-	    var this$1 = this;
+	    var i; // All joined ways must belong to the same set of (non-restriction) relations.
+	    // Restriction relations have different logic, below, which allows some cases
+	    // this prohibits, and prohibits some cases this allows.
 
-	    var options = {
-	      client: 'iD',
-	      status: 'OPEN',
-	      zoom: '19' // Use a high zoom so that clusters aren't returned
+	    var sortedParentRelations = function sortedParentRelations(id) {
+	      return graph.parentRelations(graph.entity(id)).filter(function (rel) {
+	        return !rel.isRestriction() && !rel.isConnectivity();
+	      }).sort(function (a, b) {
+	        return a.id - b.id;
+	      });
 	    };
 
-	    // determine the needed tiles to cover the view
-	    var tiles = tiler$1
-	      .zoomExtent([_tileZoom$1, _tileZoom$1])
-	      .getTiles(projection);
+	    var relsA = sortedParentRelations(ids[0]);
+
+	    for (i = 1; i < ids.length; i++) {
+	      var relsB = sortedParentRelations(ids[i]);
+
+	      if (!utilArrayIdentical(relsA, relsB)) {
+	        return 'conflicting_relations';
+	      }
+	    } // Loop through all combinations of path-pairs
+	    // to check potential intersections between all pairs
+
+
+	    for (i = 0; i < ids.length - 1; i++) {
+	      for (var j = i + 1; j < ids.length; j++) {
+	        var path1 = graph.childNodes(graph.entity(ids[i])).map(function (e) {
+	          return e.loc;
+	        });
+	        var path2 = graph.childNodes(graph.entity(ids[j])).map(function (e) {
+	          return e.loc;
+	        });
+	        var intersections = geoPathIntersections(path1, path2); // Check if intersections are just nodes lying on top of
+	        // each other/the line, as opposed to crossing it
+
+	        var common = utilArrayIntersection(joined[0].nodes.map(function (n) {
+	          return n.loc.toString();
+	        }), intersections.map(function (n) {
+	          return n.toString();
+	        }));
+
+	        if (common.length !== intersections.length) {
+	          return 'paths_intersect';
+	        }
+	      }
+	    }
+
+	    var nodeIds = joined[0].nodes.map(function (n) {
+	      return n.id;
+	    }).slice(1, -1);
+	    var relation;
+	    var tags = {};
+	    var conflicting = false;
+	    joined[0].forEach(function (way) {
+	      var parents = graph.parentRelations(way);
+	      parents.forEach(function (parent) {
+	        if ((parent.isRestriction() || parent.isConnectivity()) && parent.members.some(function (m) {
+	          return nodeIds.indexOf(m.id) >= 0;
+	        })) {
+	          relation = parent;
+	        }
+	      });
+
+	      for (var k in way.tags) {
+	        if (!(k in tags)) {
+	          tags[k] = way.tags[k];
+	        } else if (tags[k] && osmIsInterestingTag(k) && tags[k] !== way.tags[k]) {
+	          conflicting = true;
+	        }
+	      }
+	    });
 
-	    // abort inflight requests that are no longer needed
-	    abortUnwantedRequests$1(_cache$1, tiles);
+	    if (relation) {
+	      return relation.isRestriction() ? 'restriction' : 'connectivity';
+	    }
 
-	    // issue new requests..
-	    tiles.forEach(function (tile) {
-	      if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) { return; }
+	    if (conflicting) {
+	      return 'conflicting_tags';
+	    }
+	  };
 
-	      var ref = tile.extent.rectangle();
-	      var east = ref[0];
-	      var north = ref[1];
-	      var west = ref[2];
-	      var south = ref[3];
-	      var params = Object.assign({}, options, { east: east, south: south, west: west, north: north });
+	  return action;
+	}
 
-	      // 3 separate requests to store for each tile
-	      var requests = {};
+	function actionMerge(ids) {
+	  function groupEntitiesByGeometry(graph) {
+	    var entities = ids.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    return Object.assign({
+	      point: [],
+	      area: [],
+	      line: [],
+	      relation: []
+	    }, utilArrayGroupBy(entities, function (entity) {
+	      return entity.geometry(graph);
+	    }));
+	  }
+
+	  var action = function action(graph) {
+	    var geometries = groupEntitiesByGeometry(graph);
+	    var target = geometries.area[0] || geometries.line[0];
+	    var points = geometries.point;
+	    points.forEach(function (point) {
+	      target = target.mergeTags(point.tags);
+	      graph = graph.replace(target);
+	      graph.parentRelations(point).forEach(function (parent) {
+	        graph = graph.replace(parent.replaceMember(point, target));
+	      });
+	      var nodes = utilArrayUniq(graph.childNodes(target));
+	      var removeNode = point;
 
-	      Object.keys(_impOsmUrls).forEach(function (k) {
-	        // We exclude WATER from missing geometry as it doesn't seem useful
-	        // We use most confident one-way and turn restrictions only, still have false positives
-	        var kParams = Object.assign({},
-	          params,
-	          (k === 'mr') ? { type: 'PARKING,ROAD,BOTH,PATH' } : { confidenceLevel: 'C1' }
-	        );
-	        var url = (_impOsmUrls[k]) + "/search?" + utilQsString(kParams);
-	        var controller = new AbortController();
+	      if (!point.isNew()) {
+	        // Try to preserve the original point if it already has
+	        // an ID in the database.
+	        var inserted = false;
 
-	        requests[k] = controller;
+	        var canBeReplaced = function canBeReplaced(node) {
+	          return !(graph.parentWays(node).length > 1 || graph.parentRelations(node).length);
+	        };
 
-	        d3_json(url, { signal: controller.signal })
-	          .then(function (data) {
-	            delete _cache$1.inflightTile[tile.id][k];
-	            if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
-	              delete _cache$1.inflightTile[tile.id];
-	              _cache$1.loadedTile[tile.id] = true;
-	            }
+	        var replaceNode = function replaceNode(node) {
+	          graph = graph.replace(point.update({
+	            tags: node.tags,
+	            loc: node.loc
+	          }));
+	          target = target.replaceNode(node.id, point.id);
+	          graph = graph.replace(target);
+	          removeNode = node;
+	          inserted = true;
+	        };
 
-	            // Road segments at high zoom == oneways
-	            if (data.roadSegments) {
-	              data.roadSegments.forEach(function (feature) {
-	                // Position error at the approximate middle of the segment
-	                var points = feature.points;
-	                var wayId = feature.wayId;
-	                var fromNodeId = feature.fromNodeId;
-	                var toNodeId = feature.toNodeId;
-	                var itemId = "" + wayId + fromNodeId + toNodeId;
-	                var mid = points.length / 2;
-	                var loc;
-
-	                // Even number of points, find midpoint of the middle two
-	                // Odd number of points, use position of very middle point
-	                if (mid % 1 === 0) {
-	                  loc = pointAverage([points[mid - 1], points[mid]]);
-	                } else {
-	                  mid = points[Math.floor(mid)];
-	                  loc = [mid.lon, mid.lat];
-	                }
+	        var i;
+	        var node; // First, try to replace a new child node on the target way.
 
-	                // One-ways can land on same segment in opposite direction
-	                loc = preventCoincident(loc, false);
-
-	                var d = new QAItem(loc, this$1, k, itemId, {
-	                  issueKey: k, // used as a category
-	                  identifier: { // used to post changes
-	                    wayId: wayId,
-	                    fromNodeId: fromNodeId,
-	                    toNodeId: toNodeId
-	                  },
-	                  objectId: wayId,
-	                  objectType: 'way'
-	                });
+	        for (i = 0; i < nodes.length; i++) {
+	          node = nodes[i];
 
-	                // Variables used in the description
-	                d.replacements = {
-	                  percentage: feature.percentOfTrips,
-	                  num_trips: feature.numberOfTrips,
-	                  highway: linkErrorObject(_t('QA.keepRight.error_parts.highway')),
-	                  from_node: linkEntity('n' + feature.fromNodeId),
-	                  to_node: linkEntity('n' + feature.toNodeId)
-	                };
+	          if (canBeReplaced(node) && node.isNew()) {
+	            replaceNode(node);
+	            break;
+	          }
+	        }
 
-	                _cache$1.data[d.id] = d;
-	                _cache$1.rtree.insert(encodeIssueRtree$1(d));
-	              });
+	        if (!inserted && point.hasInterestingTags()) {
+	          // No new child node found, try to find an existing, but
+	          // uninteresting child node instead.
+	          for (i = 0; i < nodes.length; i++) {
+	            node = nodes[i];
+
+	            if (canBeReplaced(node) && !node.hasInterestingTags()) {
+	              replaceNode(node);
+	              break;
 	            }
+	          }
 
-	            // Tiles at high zoom == missing roads
-	            if (data.tiles) {
-	              data.tiles.forEach(function (feature) {
-	                var type = feature.type;
-	                var x = feature.x;
-	                var y = feature.y;
-	                var numberOfTrips = feature.numberOfTrips;
-	                var geoType = type.toLowerCase();
-	                var itemId = "" + geoType + x + y + numberOfTrips;
-
-	                // Average of recorded points should land on the missing geometry
-	                // Missing geometry could happen to land on another error
-	                var loc = pointAverage(feature.points);
-	                loc = preventCoincident(loc, false);
-
-	                var d = new QAItem(loc, this$1, (k + "-" + geoType), itemId, {
-	                  issueKey: k,
-	                  identifier: { x: x, y: y }
-	                });
+	          if (!inserted) {
+	            // Still not inserted, try to find an existing, interesting,
+	            // but more recent child node.
+	            for (i = 0; i < nodes.length; i++) {
+	              node = nodes[i];
 
-	                d.replacements = {
-	                  num_trips: numberOfTrips,
-	                  geometry_type: _t(("QA.improveOSM.geometry_types." + geoType))
-	                };
+	              if (canBeReplaced(node) && utilCompareIDs(point.id, node.id) < 0) {
+	                replaceNode(node);
+	                break;
+	              }
+	            }
+	          } // If the point still hasn't been inserted, we give up.
+	          // There are more interesting or older nodes on the way.
 
-	                // -1 trips indicates data came from a 3rd party
-	                if (numberOfTrips === -1) {
-	                  d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
-	                }
+	        }
+	      }
 
-	                _cache$1.data[d.id] = d;
-	                _cache$1.rtree.insert(encodeIssueRtree$1(d));
-	              });
-	            }
+	      graph = graph.remove(removeNode);
+	    });
 
-	            // Entities at high zoom == turn restrictions
-	            if (data.entities) {
-	              data.entities.forEach(function (feature) {
-	                var point = feature.point;
-	                var id = feature.id;
-	                var segments = feature.segments;
-	                var numberOfPasses = feature.numberOfPasses;
-	                var turnType = feature.turnType;
-	                var itemId = "" + (id.replace(/[,:+#]/g, '_'));
-
-	                // Turn restrictions could be missing at same junction
-	                // We also want to bump the error up so node is accessible
-	                var loc = preventCoincident([point.lon, point.lat], true);
-
-	                // Elements are presented in a strange way
-	                var ids = id.split(',');
-	                var from_way = ids[0];
-	                var via_node = ids[3];
-	                var to_way = ids[2].split(':')[1];
-
-	                var d = new QAItem(loc, this$1, k, itemId, {
-	                  issueKey: k,
-	                  identifier: id,
-	                  objectId: via_node,
-	                  objectType: 'node'
-	                });
+	    if (target.tags.area === 'yes') {
+	      var tags = Object.assign({}, target.tags); // shallow copy
 
-	                // Travel direction along from_way clarifies the turn restriction
-	                var ref = segments[0].points;
-	                var p1 = ref[0];
-	                var p2 = ref[1];
-	                var dir_of_travel = cardinalDirection(relativeBearing(p1, p2));
-
-	                // Variables used in the description
-	                d.replacements = {
-	                  num_passed: numberOfPasses,
-	                  num_trips: segments[0].numberOfTrips,
-	                  turn_restriction: turnType.toLowerCase(),
-	                  from_way: linkEntity('w' + from_way),
-	                  to_way: linkEntity('w' + to_way),
-	                  travel_direction: dir_of_travel,
-	                  junction: linkErrorObject(_t('QA.keepRight.error_parts.this_node'))
-	                };
+	      delete tags.area;
 
-	                _cache$1.data[d.id] = d;
-	                _cache$1.rtree.insert(encodeIssueRtree$1(d));
-	                dispatch$2.call('loaded');
-	              });
-	            }
-	          })
-	          .catch(function () {
-	            delete _cache$1.inflightTile[tile.id][k];
-	            if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
-	              delete _cache$1.inflightTile[tile.id];
-	              _cache$1.loadedTile[tile.id] = true;
-	            }
-	          });
-	      });
+	      if (osmTagSuggestingArea(tags)) {
+	        // remove the `area` tag if area geometry is now implied - #3851
+	        target = target.update({
+	          tags: tags
+	        });
+	        graph = graph.replace(target);
+	      }
+	    }
 
-	      _cache$1.inflightTile[tile.id] = requests;
-	    });
-	  },
+	    return graph;
+	  };
 
-	  getComments: function getComments(item) {
-	    var this$1 = this;
+	  action.disabled = function (graph) {
+	    var geometries = groupEntitiesByGeometry(graph);
 
-	    // If comments already retrieved no need to do so again
-	    if (item.comments) {
-	      return Promise.resolve(item);
+	    if (geometries.point.length === 0 || geometries.area.length + geometries.line.length !== 1 || geometries.relation.length !== 0) {
+	      return 'not_eligible';
 	    }
+	  };
 
-	    var key = item.issueKey;
-	    var qParams = {};
+	  return action;
+	}
 
-	    if (key === 'ow') {
-	      qParams = item.identifier;
-	    } else if (key === 'mr') {
-	      qParams.tileX = item.identifier.x;
-	      qParams.tileY = item.identifier.y;
-	    } else if (key === 'tr') {
-	      qParams.targetId = item.identifier;
+	//
+	// 1. move all the nodes to a common location
+	// 2. `actionConnect` them
+
+	function actionMergeNodes(nodeIDs, loc) {
+	  // If there is a single "interesting" node, use that as the location.
+	  // Otherwise return the average location of all the nodes.
+	  function chooseLoc(graph) {
+	    if (!nodeIDs.length) return null;
+	    var sum = [0, 0];
+	    var interestingCount = 0;
+	    var interestingLoc;
+
+	    for (var i = 0; i < nodeIDs.length; i++) {
+	      var node = graph.entity(nodeIDs[i]);
+
+	      if (node.hasInterestingTags()) {
+	        interestingLoc = ++interestingCount === 1 ? node.loc : null;
+	      }
+
+	      sum = geoVecAdd(sum, node.loc);
 	    }
 
-	    var url = (_impOsmUrls[key]) + "/retrieveComments?" + utilQsString(qParams);
-	    var cacheComments = function (data) {
-	      // Assign directly for immediate use afterwards
-	      // comments are served newest to oldest
-	      item.comments = data.comments ? data.comments.reverse() : [];
-	      this$1.replaceItem(item);
-	    };
+	    return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
+	  }
 
-	    return d3_json(url).then(cacheComments).then(function () { return item; });
-	  },
+	  var action = function action(graph) {
+	    if (nodeIDs.length < 2) return graph;
+	    var toLoc = loc;
 
-	  postUpdate: function postUpdate(d, callback) {
-	    if (!serviceOsm.authenticated()) { // Username required in payload
-	      return callback({ message: 'Not Authenticated', status: -3}, d);
+	    if (!toLoc) {
+	      toLoc = chooseLoc(graph);
 	    }
-	    if (_cache$1.inflightPost[d.id]) {
-	      return callback({ message: 'Error update already inflight', status: -2 }, d);
+
+	    for (var i = 0; i < nodeIDs.length; i++) {
+	      var node = graph.entity(nodeIDs[i]);
+
+	      if (node.loc !== toLoc) {
+	        graph = graph.replace(node.move(toLoc));
+	      }
 	    }
 
-	    // Payload can only be sent once username is established
-	    serviceOsm.userDetails(sendPayload.bind(this));
+	    return actionConnect(nodeIDs)(graph);
+	  };
 
-	    function sendPayload(err, user) {
-	      var this$1 = this;
+	  action.disabled = function (graph) {
+	    if (nodeIDs.length < 2) return 'not_eligible';
 
-	      if (err) { return callback(err, d); }
+	    for (var i = 0; i < nodeIDs.length; i++) {
+	      var entity = graph.entity(nodeIDs[i]);
+	      if (entity.type !== 'node') return 'not_eligible';
+	    }
 
-	      var key = d.issueKey;
-	      var url = (_impOsmUrls[key]) + "/comment";
-	      var payload = {
-	        username: user.display_name,
-	        targetIds: [ d.identifier ]
-	      };
+	    return actionConnect(nodeIDs).disabled(graph);
+	  };
 
-	      if (d.newStatus) {
-	        payload.status = d.newStatus;
-	        payload.text = 'status changed';
-	      }
+	  return action;
+	}
 
-	      // Comment take place of default text
-	      if (d.newComment) {
-	        payload.text = d.newComment;
+	function osmChangeset() {
+	  if (!(this instanceof osmChangeset)) {
+	    return new osmChangeset().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
+	  }
+	}
+	osmEntity.changeset = osmChangeset;
+	osmChangeset.prototype = Object.create(osmEntity.prototype);
+	Object.assign(osmChangeset.prototype, {
+	  type: 'changeset',
+	  extent: function extent() {
+	    return new geoExtent();
+	  },
+	  geometry: function geometry() {
+	    return 'changeset';
+	  },
+	  asJXON: function asJXON() {
+	    return {
+	      osm: {
+	        changeset: {
+	          tag: Object.keys(this.tags).map(function (k) {
+	            return {
+	              '@k': k,
+	              '@v': this.tags[k]
+	            };
+	          }, this),
+	          '@version': 0.6,
+	          '@generator': 'iD'
+	        }
+	      }
+	    };
+	  },
+	  // Generate [osmChange](http://wiki.openstreetmap.org/wiki/OsmChange)
+	  // XML. Returns a string.
+	  osmChangeJXON: function osmChangeJXON(changes) {
+	    var changeset_id = this.id;
+
+	    function nest(x, order) {
+	      var groups = {};
+
+	      for (var i = 0; i < x.length; i++) {
+	        var tagName = Object.keys(x[i])[0];
+	        if (!groups[tagName]) groups[tagName] = [];
+	        groups[tagName].push(x[i][tagName]);
 	      }
 
-	      var controller = new AbortController();
-	      _cache$1.inflightPost[d.id] = controller;
-
-	      var options = {
-	        method: 'POST',
-	        signal: controller.signal,
-	        body: JSON.stringify(payload)
-	      };
+	      var ordered = {};
+	      order.forEach(function (o) {
+	        if (groups[o]) ordered[o] = groups[o];
+	      });
+	      return ordered;
+	    } // sort relations in a changeset by dependencies
 
-	      d3_json(url, options)
-	        .then(function () {
-	          delete _cache$1.inflightPost[d.id];
 
-	          // Just a comment, update error in cache
-	          if (!d.newStatus) {
-	            var now = new Date();
-	            var comments = d.comments ? d.comments : [];
+	    function sort(changes) {
+	      // find a referenced relation in the current changeset
+	      function resolve(item) {
+	        return relations.find(function (relation) {
+	          return item.keyAttributes.type === 'relation' && item.keyAttributes.ref === relation['@id'];
+	        });
+	      } // a new item is an item that has not been already processed
 
-	            comments.push({
-	              username: payload.username,
-	              text: payload.text,
-	              timestamp: now.getTime() / 1000
-	            });
 
-	            this$1.replaceItem(d.update({
-	              comments: comments,
-	              newComment: undefined
-	            }));
-	          } else {
-	            this$1.removeItem(d);
-	            if (d.newStatus === 'SOLVED') {
-	              // Keep track of the number of issues closed per type to tag the changeset
-	              if (!(d.issueKey in _cache$1.closed)) {
-	                _cache$1.closed[d.issueKey] = 0;
-	              }
-	              _cache$1.closed[d.issueKey] += 1;
-	            }
-	          }
-	          if (callback) { callback(null, d); }
-	        })
-	        .catch(function (err) {
-	          delete _cache$1.inflightPost[d.id];
-	          if (callback) { callback(err.message); }
+	      function isNew(item) {
+	        return !sorted[item['@id']] && !processing.find(function (proc) {
+	          return proc['@id'] === item['@id'];
 	        });
-	    }
-	  },
-
+	      }
 
-	  // Get all cached QAItems covering the viewport
-	  getItems: function getItems(projection) {
-	    var viewport = projection.clipExtent();
-	    var min = [viewport[0][0], viewport[1][1]];
-	    var max = [viewport[1][0], viewport[0][1]];
-	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	      var processing = [];
+	      var sorted = {};
+	      var relations = changes.relation;
+	      if (!relations) return changes;
 
-	    return _cache$1.rtree.search(bbox).map(function (d) { return d.data; });
-	  },
+	      for (var i = 0; i < relations.length; i++) {
+	        var relation = relations[i]; // skip relation if already sorted
 
-	  // Get a QAItem from cache
-	  // NOTE: Don't change method name until UI v3 is merged
-	  getError: function getError(id) {
-	    return _cache$1.data[id];
-	  },
+	        if (!sorted[relation['@id']]) {
+	          processing.push(relation);
+	        }
 
-	  // get the name of the icon to display for this item
-	  getIcon: function getIcon(itemType) {
-	    return _impOsmData.icons[itemType];
-	  },
+	        while (processing.length > 0) {
+	          var next = processing[0],
+	              deps = next.member.map(resolve).filter(Boolean).filter(isNew);
 
-	  // Replace a single QAItem in the cache
-	  replaceItem: function replaceItem(issue) {
-	    if (!(issue instanceof QAItem) || !issue.id) { return; }
+	          if (deps.length === 0) {
+	            sorted[next['@id']] = next;
+	            processing.shift();
+	          } else {
+	            processing = deps.concat(processing);
+	          }
+	        }
+	      }
 
-	    _cache$1.data[issue.id] = issue;
-	    updateRtree$1(encodeIssueRtree$1(issue), true); // true = replace
-	    return issue;
-	  },
+	      changes.relation = Object.values(sorted);
+	      return changes;
+	    }
 
-	  // Remove a single QAItem from the cache
-	  removeItem: function removeItem(issue) {
-	    if (!(issue instanceof QAItem) || !issue.id) { return; }
+	    function rep(entity) {
+	      return entity.asJXON(changeset_id);
+	    }
 
-	    delete _cache$1.data[issue.id];
-	    updateRtree$1(encodeIssueRtree$1(issue), false); // false = remove
+	    return {
+	      osmChange: {
+	        '@version': 0.6,
+	        '@generator': 'iD',
+	        'create': sort(nest(changes.created.map(rep), ['node', 'way', 'relation'])),
+	        'modify': nest(changes.modified.map(rep), ['node', 'way', 'relation']),
+	        'delete': Object.assign(nest(changes.deleted.map(rep), ['relation', 'way', 'node']), {
+	          '@if-unused': true
+	        })
+	      }
+	    };
 	  },
-
-	  // Used to populate `closed:improveosm:*` changeset tags
-	  getClosedCounts: function getClosedCounts() {
-	    return _cache$1.closed;
+	  asGeoJSON: function asGeoJSON() {
+	    return {};
 	  }
-	};
-
-	var defaults = createCommonjsModule(function (module) {
-	function getDefaults() {
-	  return {
-	    baseUrl: null,
-	    breaks: false,
-	    gfm: true,
-	    headerIds: true,
-	    headerPrefix: '',
-	    highlight: null,
-	    langPrefix: 'language-',
-	    mangle: true,
-	    pedantic: false,
-	    renderer: null,
-	    sanitize: false,
-	    sanitizer: null,
-	    silent: false,
-	    smartLists: false,
-	    smartypants: false,
-	    tokenizer: null,
-	    xhtml: false
-	  };
-	}
+	});
 
-	function changeDefaults(newDefaults) {
-	  module.exports.defaults = newDefaults;
+	function osmNote() {
+	  if (!(this instanceof osmNote)) {
+	    return new osmNote().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
+	  }
 	}
 
-	module.exports = {
-	  defaults: getDefaults(),
-	  getDefaults: getDefaults,
-	  changeDefaults: changeDefaults
+	osmNote.id = function () {
+	  return osmNote.id.next--;
 	};
-	});
 
-	/**
-	 * Helpers
-	 */
-	var escapeTest = /[&<>"']/;
-	var escapeReplace = /[&<>"']/g;
-	var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
-	var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
-	var escapeReplacements = {
-	  '&': '&amp;',
-	  '<': '&lt;',
-	  '>': '&gt;',
-	  '"': '&quot;',
-	  "'": '&#39;'
-	};
-	var getEscapeReplacement = function (ch) { return escapeReplacements[ch]; };
-	function escape$1(html, encode) {
-	  if (encode) {
-	    if (escapeTest.test(html)) {
-	      return html.replace(escapeReplace, getEscapeReplacement);
+	osmNote.id.next = -1;
+	Object.assign(osmNote.prototype, {
+	  type: 'note',
+	  initialize: function initialize(sources) {
+	    for (var i = 0; i < sources.length; ++i) {
+	      var source = sources[i];
+
+	      for (var prop in source) {
+	        if (Object.prototype.hasOwnProperty.call(source, prop)) {
+	          if (source[prop] === undefined) {
+	            delete this[prop];
+	          } else {
+	            this[prop] = source[prop];
+	          }
+	        }
+	      }
 	    }
-	  } else {
-	    if (escapeTestNoEncode.test(html)) {
-	      return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
+
+	    if (!this.id) {
+	      this.id = osmNote.id().toString();
 	    }
+
+	    return this;
+	  },
+	  extent: function extent() {
+	    return new geoExtent(this.loc);
+	  },
+	  update: function update(attrs) {
+	    return osmNote(this, attrs); // {v: 1 + (this.v || 0)}
+	  },
+	  isNew: function isNew() {
+	    return this.id < 0;
+	  },
+	  move: function move(loc) {
+	    return this.update({
+	      loc: loc
+	    });
 	  }
+	});
 
-	  return html;
+	function osmRelation() {
+	  if (!(this instanceof osmRelation)) {
+	    return new osmRelation().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
+	  }
 	}
+	osmEntity.relation = osmRelation;
+	osmRelation.prototype = Object.create(osmEntity.prototype);
 
-	var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
+	osmRelation.creationOrder = function (a, b) {
+	  var aId = parseInt(osmEntity.id.toOSM(a.id), 10);
+	  var bId = parseInt(osmEntity.id.toOSM(b.id), 10);
+	  if (aId < 0 || bId < 0) return aId - bId;
+	  return bId - aId;
+	};
 
-	function unescape$1(html) {
-	  // explicitly match decimal, hex, and named HTML entities
-	  return html.replace(unescapeTest, function (_, n) {
-	    n = n.toLowerCase();
-	    if (n === 'colon') { return ':'; }
-	    if (n.charAt(0) === '#') {
-	      return n.charAt(1) === 'x'
-	        ? String.fromCharCode(parseInt(n.substring(2), 16))
-	        : String.fromCharCode(+n.substring(1));
+	Object.assign(osmRelation.prototype, {
+	  type: 'relation',
+	  members: [],
+	  copy: function copy(resolver, copies) {
+	    if (copies[this.id]) return copies[this.id];
+	    var copy = osmEntity.prototype.copy.call(this, resolver, copies);
+	    var members = this.members.map(function (member) {
+	      return Object.assign({}, member, {
+	        id: resolver.entity(member.id).copy(resolver, copies).id
+	      });
+	    });
+	    copy = copy.update({
+	      members: members
+	    });
+	    copies[this.id] = copy;
+	    return copy;
+	  },
+	  extent: function extent(resolver, memo) {
+	    return resolver["transient"](this, 'extent', function () {
+	      if (memo && memo[this.id]) return geoExtent();
+	      memo = memo || {};
+	      memo[this.id] = true;
+	      var extent = geoExtent();
+
+	      for (var i = 0; i < this.members.length; i++) {
+	        var member = resolver.hasEntity(this.members[i].id);
+
+	        if (member) {
+	          extent._extend(member.extent(resolver, memo));
+	        }
+	      }
+
+	      return extent;
+	    });
+	  },
+	  geometry: function geometry(graph) {
+	    return graph["transient"](this, 'geometry', function () {
+	      return this.isMultipolygon() ? 'area' : 'relation';
+	    });
+	  },
+	  isDegenerate: function isDegenerate() {
+	    return this.members.length === 0;
+	  },
+	  // Return an array of members, each extended with an 'index' property whose value
+	  // is the member index.
+	  indexedMembers: function indexedMembers() {
+	    var result = new Array(this.members.length);
+
+	    for (var i = 0; i < this.members.length; i++) {
+	      result[i] = Object.assign({}, this.members[i], {
+	        index: i
+	      });
 	    }
-	    return '';
-	  });
-	}
 
-	var caret = /(^|[^\[])\^/g;
-	function edit(regex, opt) {
-	  regex = regex.source || regex;
-	  opt = opt || '';
-	  var obj = {
-	    replace: function (name, val) {
-	      val = val.source || val;
-	      val = val.replace(caret, '$1');
-	      regex = regex.replace(name, val);
-	      return obj;
-	    },
-	    getRegex: function () {
-	      return new RegExp(regex, opt);
+	    return result;
+	  },
+	  // Return the first member with the given role. A copy of the member object
+	  // is returned, extended with an 'index' property whose value is the member index.
+	  memberByRole: function memberByRole(role) {
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (this.members[i].role === role) {
+	        return Object.assign({}, this.members[i], {
+	          index: i
+	        });
+	      }
 	    }
-	  };
-	  return obj;
-	}
+	  },
+	  // Same as memberByRole, but returns all members with the given role
+	  membersByRole: function membersByRole(role) {
+	    var result = [];
 
-	var nonWordAndColonTest = /[^\w:]/g;
-	var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
-	function cleanUrl(sanitize, base, href) {
-	  if (sanitize) {
-	    var prot;
-	    try {
-	      prot = decodeURIComponent(unescape$1(href))
-	        .replace(nonWordAndColonTest, '')
-	        .toLowerCase();
-	    } catch (e) {
-	      return null;
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (this.members[i].role === role) {
+	        result.push(Object.assign({}, this.members[i], {
+	          index: i
+	        }));
+	      }
 	    }
-	    if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
-	      return null;
+
+	    return result;
+	  },
+	  // Return the first member with the given id. A copy of the member object
+	  // is returned, extended with an 'index' property whose value is the member index.
+	  memberById: function memberById(id) {
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (this.members[i].id === id) {
+	        return Object.assign({}, this.members[i], {
+	          index: i
+	        });
+	      }
+	    }
+	  },
+	  // Return the first member with the given id and role. A copy of the member object
+	  // is returned, extended with an 'index' property whose value is the member index.
+	  memberByIdAndRole: function memberByIdAndRole(id, role) {
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (this.members[i].id === id && this.members[i].role === role) {
+	        return Object.assign({}, this.members[i], {
+	          index: i
+	        });
+	      }
+	    }
+	  },
+	  addMember: function addMember(member, index) {
+	    var members = this.members.slice();
+	    members.splice(index === undefined ? members.length : index, 0, member);
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  updateMember: function updateMember(member, index) {
+	    var members = this.members.slice();
+	    members.splice(index, 1, Object.assign({}, members[index], member));
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  removeMember: function removeMember(index) {
+	    var members = this.members.slice();
+	    members.splice(index, 1);
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  removeMembersWithID: function removeMembersWithID(id) {
+	    var members = this.members.filter(function (m) {
+	      return m.id !== id;
+	    });
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  moveMember: function moveMember(fromIndex, toIndex) {
+	    var members = this.members.slice();
+	    members.splice(toIndex, 0, members.splice(fromIndex, 1)[0]);
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  // Wherever a member appears with id `needle.id`, replace it with a member
+	  // with id `replacement.id`, type `replacement.type`, and the original role,
+	  // By default, adding a duplicate member (by id and role) is prevented.
+	  // Return an updated relation.
+	  replaceMember: function replaceMember(needle, replacement, keepDuplicates) {
+	    if (!this.memberById(needle.id)) return this;
+	    var members = [];
+
+	    for (var i = 0; i < this.members.length; i++) {
+	      var member = this.members[i];
+
+	      if (member.id !== needle.id) {
+	        members.push(member);
+	      } else if (keepDuplicates || !this.memberByIdAndRole(replacement.id, member.role)) {
+	        members.push({
+	          id: replacement.id,
+	          type: replacement.type,
+	          role: member.role
+	        });
+	      }
 	    }
-	  }
-	  if (base && !originIndependentUrl.test(href)) {
-	    href = resolveUrl(base, href);
-	  }
-	  try {
-	    href = encodeURI(href).replace(/%25/g, '%');
-	  } catch (e$1) {
-	    return null;
-	  }
-	  return href;
-	}
 
-	var baseUrls = {};
-	var justDomain = /^[^:]+:\/*[^/]*$/;
-	var protocol = /^([^:]+:)[\s\S]*$/;
-	var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  asJXON: function asJXON(changeset_id) {
+	    var r = {
+	      relation: {
+	        '@id': this.osmId(),
+	        '@version': this.version || 0,
+	        member: this.members.map(function (member) {
+	          return {
+	            keyAttributes: {
+	              type: member.type,
+	              role: member.role,
+	              ref: osmEntity.id.toOSM(member.id)
+	            }
+	          };
+	        }, this),
+	        tag: Object.keys(this.tags).map(function (k) {
+	          return {
+	            keyAttributes: {
+	              k: k,
+	              v: this.tags[k]
+	            }
+	          };
+	        }, this)
+	      }
+	    };
 
-	function resolveUrl(base, href) {
-	  if (!baseUrls[' ' + base]) {
-	    // we can ignore everything in base after the last slash of its path component,
-	    // but we might need to add _that_
-	    // https://tools.ietf.org/html/rfc3986#section-3
-	    if (justDomain.test(base)) {
-	      baseUrls[' ' + base] = base + '/';
-	    } else {
-	      baseUrls[' ' + base] = rtrim(base, '/', true);
+	    if (changeset_id) {
+	      r.relation['@changeset'] = changeset_id;
 	    }
-	  }
-	  base = baseUrls[' ' + base];
-	  var relativeBase = base.indexOf(':') === -1;
 
-	  if (href.substring(0, 2) === '//') {
-	    if (relativeBase) {
-	      return href;
-	    }
-	    return base.replace(protocol, '$1') + href;
-	  } else if (href.charAt(0) === '/') {
-	    if (relativeBase) {
-	      return href;
+	    return r;
+	  },
+	  asGeoJSON: function asGeoJSON(resolver) {
+	    return resolver["transient"](this, 'GeoJSON', function () {
+	      if (this.isMultipolygon()) {
+	        return {
+	          type: 'MultiPolygon',
+	          coordinates: this.multipolygon(resolver)
+	        };
+	      } else {
+	        return {
+	          type: 'FeatureCollection',
+	          properties: this.tags,
+	          features: this.members.map(function (member) {
+	            return Object.assign({
+	              role: member.role
+	            }, resolver.entity(member.id).asGeoJSON(resolver));
+	          })
+	        };
+	      }
+	    });
+	  },
+	  area: function area(resolver) {
+	    return resolver["transient"](this, 'area', function () {
+	      return d3_geoArea(this.asGeoJSON(resolver));
+	    });
+	  },
+	  isMultipolygon: function isMultipolygon() {
+	    return this.tags.type === 'multipolygon';
+	  },
+	  isComplete: function isComplete(resolver) {
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (!resolver.hasEntity(this.members[i].id)) {
+	        return false;
+	      }
 	    }
-	    return base.replace(domain, '$1') + href;
-	  } else {
-	    return base + href;
-	  }
-	}
 
-	var noopTest = { exec: function noopTest() {} };
+	    return true;
+	  },
+	  hasFromViaTo: function hasFromViaTo() {
+	    return this.members.some(function (m) {
+	      return m.role === 'from';
+	    }) && this.members.some(function (m) {
+	      return m.role === 'via';
+	    }) && this.members.some(function (m) {
+	      return m.role === 'to';
+	    });
+	  },
+	  isRestriction: function isRestriction() {
+	    return !!(this.tags.type && this.tags.type.match(/^restriction:?/));
+	  },
+	  isValidRestriction: function isValidRestriction() {
+	    if (!this.isRestriction()) return false;
+	    var froms = this.members.filter(function (m) {
+	      return m.role === 'from';
+	    });
+	    var vias = this.members.filter(function (m) {
+	      return m.role === 'via';
+	    });
+	    var tos = this.members.filter(function (m) {
+	      return m.role === 'to';
+	    });
+	    if (froms.length !== 1 && this.tags.restriction !== 'no_entry') return false;
+	    if (froms.some(function (m) {
+	      return m.type !== 'way';
+	    })) return false;
+	    if (tos.length !== 1 && this.tags.restriction !== 'no_exit') return false;
+	    if (tos.some(function (m) {
+	      return m.type !== 'way';
+	    })) return false;
+	    if (vias.length === 0) return false;
+	    if (vias.length > 1 && vias.some(function (m) {
+	      return m.type !== 'way';
+	    })) return false;
+	    return true;
+	  },
+	  isConnectivity: function isConnectivity() {
+	    return !!(this.tags.type && this.tags.type.match(/^connectivity:?/));
+	  },
+	  // Returns an array [A0, ... An], each Ai being an array of node arrays [Nds0, ... Ndsm],
+	  // where Nds0 is an outer ring and subsequent Ndsi's (if any i > 0) being inner rings.
+	  //
+	  // This corresponds to the structure needed for rendering a multipolygon path using a
+	  // `evenodd` fill rule, as well as the structure of a GeoJSON MultiPolygon geometry.
+	  //
+	  // In the case of invalid geometries, this function will still return a result which
+	  // includes the nodes of all way members, but some Nds may be unclosed and some inner
+	  // rings not matched with the intended outer ring.
+	  //
+	  multipolygon: function multipolygon(resolver) {
+	    var outers = this.members.filter(function (m) {
+	      return 'outer' === (m.role || 'outer');
+	    });
+	    var inners = this.members.filter(function (m) {
+	      return 'inner' === m.role;
+	    });
+	    outers = osmJoinWays(outers, resolver);
+	    inners = osmJoinWays(inners, resolver);
 
-	function merge$1(obj) {
-	  var arguments$1 = arguments;
+	    var sequenceToLineString = function sequenceToLineString(sequence) {
+	      if (sequence.nodes.length > 2 && sequence.nodes[0] !== sequence.nodes[sequence.nodes.length - 1]) {
+	        // close unclosed parts to ensure correct area rendering - #2945
+	        sequence.nodes.push(sequence.nodes[0]);
+	      }
 
-	  var i = 1,
-	    target,
-	    key;
+	      return sequence.nodes.map(function (node) {
+	        return node.loc;
+	      });
+	    };
 
-	  for (; i < arguments.length; i++) {
-	    target = arguments$1[i];
-	    for (key in target) {
-	      if (Object.prototype.hasOwnProperty.call(target, key)) {
-	        obj[key] = target[key];
+	    outers = outers.map(sequenceToLineString);
+	    inners = inners.map(sequenceToLineString);
+	    var result = outers.map(function (o) {
+	      // Heuristic for detecting counterclockwise winding order. Assumes
+	      // that OpenStreetMap polygons are not hemisphere-spanning.
+	      return [d3_geoArea({
+	        type: 'Polygon',
+	        coordinates: [o]
+	      }) > 2 * Math.PI ? o.reverse() : o];
+	    });
+
+	    function findOuter(inner) {
+	      var o, outer;
+
+	      for (o = 0; o < outers.length; o++) {
+	        outer = outers[o];
+
+	        if (geoPolygonContainsPolygon(outer, inner)) {
+	          return o;
+	        }
+	      }
+
+	      for (o = 0; o < outers.length; o++) {
+	        outer = outers[o];
+
+	        if (geoPolygonIntersectsPolygon(outer, inner, false)) {
+	          return o;
+	        }
 	      }
 	    }
-	  }
 
-	  return obj;
-	}
+	    for (var i = 0; i < inners.length; i++) {
+	      var inner = inners[i];
 
-	function splitCells(tableRow, count) {
-	  // ensure that every cell-delimiting pipe has a space
-	  // before it to distinguish it from an escaped pipe
-	  var row = tableRow.replace(/\|/g, function (match, offset, str) {
-	      var escaped = false,
-	        curr = offset;
-	      while (--curr >= 0 && str[curr] === '\\') { escaped = !escaped; }
-	      if (escaped) {
-	        // odd number of slashes means | is escaped
-	        // so we leave it alone
-	        return '|';
+	      if (d3_geoArea({
+	        type: 'Polygon',
+	        coordinates: [inner]
+	      }) < 2 * Math.PI) {
+	        inner = inner.reverse();
+	      }
+
+	      var o = findOuter(inners[i]);
+
+	      if (o !== undefined) {
+	        result[o].push(inners[i]);
 	      } else {
-	        // add space before unescaped |
-	        return ' |';
+	        result.push([inners[i]]); // Invalid geometry
 	      }
-	    }),
-	    cells = row.split(/ \|/);
-	  var i = 0;
+	    }
 
-	  if (cells.length > count) {
-	    cells.splice(count);
-	  } else {
-	    while (cells.length < count) { cells.push(''); }
+	    return result;
 	  }
+	});
 
-	  for (; i < cells.length; i++) {
-	    // leading or trailing whitespace is ignored per the gfm spec
-	    cells[i] = cells[i].trim().replace(/\\\|/g, '|');
-	  }
-	  return cells;
-	}
+	var QAItem = /*#__PURE__*/function () {
+	  function QAItem(loc, service, itemType, id, props) {
+	    _classCallCheck$1(this, QAItem);
 
-	// Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
-	// /c*$/ is vulnerable to REDOS.
-	// invert: Remove suffix of non-c chars instead. Default falsey.
-	function rtrim(str, c, invert) {
-	  var l = str.length;
-	  if (l === 0) {
-	    return '';
-	  }
+	    // Store required properties
+	    this.loc = loc;
+	    this.service = service.title;
+	    this.itemType = itemType; // All issues must have an ID for selection, use generic if none specified
 
-	  // Length of suffix matching the invert condition.
-	  var suffLen = 0;
+	    this.id = id ? id : "".concat(QAItem.id());
+	    this.update(props); // Some QA services have marker icons to differentiate issues
 
-	  // Step left until we fail to match the invert condition.
-	  while (suffLen < l) {
-	    var currChar = str.charAt(l - suffLen - 1);
-	    if (currChar === c && !invert) {
-	      suffLen++;
-	    } else if (currChar !== c && invert) {
-	      suffLen++;
-	    } else {
-	      break;
+	    if (service && typeof service.getIcon === 'function') {
+	      this.icon = service.getIcon(itemType);
 	    }
 	  }
 
-	  return str.substr(0, l - suffLen);
-	}
+	  _createClass$1(QAItem, [{
+	    key: "update",
+	    value: function update(props) {
+	      var _this = this;
 
-	function findClosingBracket(str, b) {
-	  if (str.indexOf(b[1]) === -1) {
-	    return -1;
-	  }
-	  var l = str.length;
-	  var level = 0,
-	    i = 0;
-	  for (; i < l; i++) {
-	    if (str[i] === '\\') {
-	      i++;
-	    } else if (str[i] === b[0]) {
-	      level++;
-	    } else if (str[i] === b[1]) {
-	      level--;
-	      if (level < 0) {
-	        return i;
-	      }
+	      // You can't override this initial information
+	      var loc = this.loc,
+	          service = this.service,
+	          itemType = this.itemType,
+	          id = this.id;
+	      Object.keys(props).forEach(function (prop) {
+	        return _this[prop] = props[prop];
+	      });
+	      this.loc = loc;
+	      this.service = service;
+	      this.itemType = itemType;
+	      this.id = id;
+	      return this;
+	    } // Generic handling for newly created QAItems
+
+	  }], [{
+	    key: "id",
+	    value: function id() {
+	      return this.nextId--;
 	    }
-	  }
-	  return -1;
-	}
+	  }]);
+
+	  return QAItem;
+	}();
+	QAItem.nextId = -1;
+
+	//
+	// Optionally, split only the given ways, if multiple ways share
+	// the given node.
+	//
+	// This is the inverse of `iD.actionJoin`.
+	//
+	// For testing convenience, accepts an ID to assign to the new way.
+	// Normally, this will be undefined and the way will automatically
+	// be assigned a new ID.
+	//
+	// Reference:
+	//   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/SplitWayAction.as
+	//
+
+	function actionSplit(nodeIds, newWayIds) {
+	  // accept single ID for backwards-compatiblity
+	  if (typeof nodeIds === 'string') nodeIds = [nodeIds];
+
+	  var _wayIDs; // the strategy for picking which way will have a new version and which way is newly created
+
+
+	  var _keepHistoryOn = 'longest'; // 'longest', 'first'
+	  // The IDs of the ways actually created by running this action
+
+	  var _createdWayIDs = [];
+
+	  function dist(graph, nA, nB) {
+	    var locA = graph.entity(nA).loc;
+	    var locB = graph.entity(nB).loc;
+	    var epsilon = 1e-6;
+	    return locA && locB ? geoSphericalDistance(locA, locB) : epsilon;
+	  } // If the way is closed, we need to search for a partner node
+	  // to split the way at.
+	  //
+	  // The following looks for a node that is both far away from
+	  // the initial node in terms of way segment length and nearby
+	  // in terms of beeline-distance. This assures that areas get
+	  // split on the most "natural" points (independent of the number
+	  // of nodes).
+	  // For example: bone-shaped areas get split across their waist
+	  // line, circles across the diameter.
+
+
+	  function splitArea(nodes, idxA, graph) {
+	    var lengths = new Array(nodes.length);
+	    var length;
+	    var i;
+	    var best = 0;
+	    var idxB;
 
-	function checkSanitizeDeprecation(opt) {
-	  if (opt && opt.sanitize && !opt.silent) {
-	    console.warn('marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. Read more here: https://marked.js.org/#/USING_ADVANCED.md#options');
-	  }
-	}
+	    function wrap(index) {
+	      return utilWrap(index, nodes.length);
+	    } // calculate lengths
 
-	var helpers = {
-	  escape: escape$1,
-	  unescape: unescape$1,
-	  edit: edit,
-	  cleanUrl: cleanUrl,
-	  resolveUrl: resolveUrl,
-	  noopTest: noopTest,
-	  merge: merge$1,
-	  splitCells: splitCells,
-	  rtrim: rtrim,
-	  findClosingBracket: findClosingBracket,
-	  checkSanitizeDeprecation: checkSanitizeDeprecation
-	};
 
-	var defaults$1 = defaults.defaults;
-	var rtrim$1 = helpers.rtrim;
-	var splitCells$1 = helpers.splitCells;
-	var escape$2 = helpers.escape;
-	var findClosingBracket$1 = helpers.findClosingBracket;
+	    length = 0;
 
-	function outputLink(cap, link, raw) {
-	  var href = link.href;
-	  var title = link.title ? escape$2(link.title) : null;
+	    for (i = wrap(idxA + 1); i !== idxA; i = wrap(i + 1)) {
+	      length += dist(graph, nodes[i], nodes[wrap(i - 1)]);
+	      lengths[i] = length;
+	    }
 
-	  if (cap[0].charAt(0) !== '!') {
-	    return {
-	      type: 'link',
-	      raw: raw,
-	      href: href,
-	      title: title,
-	      text: cap[1]
-	    };
-	  } else {
-	    return {
-	      type: 'image',
-	      raw: raw,
-	      text: escape$2(cap[1]),
-	      href: href,
-	      title: title
-	    };
-	  }
-	}
+	    length = 0;
 
-	/**
-	 * Tokenizer
-	 */
-	var Tokenizer_1 = /*@__PURE__*/(function () {
-	  function Tokenizer(options) {
-	    this.options = options || defaults$1;
-	  }
+	    for (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
+	      length += dist(graph, nodes[i], nodes[wrap(i + 1)]);
 
-	  Tokenizer.prototype.space = function space (src) {
-	    var cap = this.rules.block.newline.exec(src);
-	    if (cap) {
-	      if (cap[0].length > 1) {
-	        return {
-	          type: 'space',
-	          raw: cap[0]
-	        };
+	      if (length < lengths[i]) {
+	        lengths[i] = length;
 	      }
-	      return { raw: '\n' };
-	    }
-	  };
+	    } // determine best opposite node to split
 
-	  Tokenizer.prototype.code = function code (src, tokens) {
-	    var cap = this.rules.block.code.exec(src);
-	    if (cap) {
-	      var lastToken = tokens[tokens.length - 1];
-	      // An indented code block cannot interrupt a paragraph.
-	      if (lastToken && lastToken.type === 'paragraph') {
-	        tokens.pop();
-	        lastToken.text += '\n' + cap[0].trimRight();
-	        lastToken.raw += '\n' + cap[0];
-	        return lastToken;
-	      } else {
-	        var text = cap[0].replace(/^ {4}/gm, '');
-	        return {
-	          type: 'code',
-	          raw: cap[0],
-	          codeBlockStyle: 'indented',
-	          text: !this.options.pedantic
-	            ? rtrim$1(text, '\n')
-	            : text
-	        };
+
+	    for (i = 0; i < nodes.length; i++) {
+	      var cost = lengths[i] / dist(graph, nodes[idxA], nodes[i]);
+
+	      if (cost > best) {
+	        idxB = i;
+	        best = cost;
 	      }
 	    }
-	  };
 
-	  Tokenizer.prototype.fences = function fences (src) {
-	    var cap = this.rules.block.fences.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'code',
-	        raw: cap[0],
-	        lang: cap[2] ? cap[2].trim() : cap[2],
-	        text: cap[3] || ''
-	      };
-	    }
-	  };
+	    return idxB;
+	  }
 
-	  Tokenizer.prototype.heading = function heading (src) {
-	    var cap = this.rules.block.heading.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'heading',
-	        raw: cap[0],
-	        depth: cap[1].length,
-	        text: cap[2]
-	      };
+	  function totalLengthBetweenNodes(graph, nodes) {
+	    var totalLength = 0;
+
+	    for (var i = 0; i < nodes.length - 1; i++) {
+	      totalLength += dist(graph, nodes[i], nodes[i + 1]);
 	    }
-	  };
 
-	  Tokenizer.prototype.nptable = function nptable (src) {
-	    var cap = this.rules.block.nptable.exec(src);
-	    if (cap) {
-	      var item = {
-	        type: 'table',
-	        header: splitCells$1(cap[1].replace(/^ *| *\| *$/g, '')),
-	        align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
-	        cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : [],
-	        raw: cap[0]
-	      };
+	    return totalLength;
+	  }
 
-	      if (item.header.length === item.align.length) {
-	        var l = item.align.length;
-	        var i;
-	        for (i = 0; i < l; i++) {
-	          if (/^ *-+: *$/.test(item.align[i])) {
-	            item.align[i] = 'right';
-	          } else if (/^ *:-+: *$/.test(item.align[i])) {
-	            item.align[i] = 'center';
-	          } else if (/^ *:-+ *$/.test(item.align[i])) {
-	            item.align[i] = 'left';
-	          } else {
-	            item.align[i] = null;
-	          }
-	        }
+	  function split(graph, nodeId, wayA, newWayId) {
+	    var wayB = osmWay({
+	      id: newWayId,
+	      tags: wayA.tags
+	    }); // `wayB` is the NEW way
 
-	        l = item.cells.length;
-	        for (i = 0; i < l; i++) {
-	          item.cells[i] = splitCells$1(item.cells[i], item.header.length);
-	        }
+	    var origNodes = wayA.nodes.slice();
+	    var nodesA;
+	    var nodesB;
+	    var isArea = wayA.isArea();
+	    var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);
 
-	        return item;
+	    if (wayA.isClosed()) {
+	      var nodes = wayA.nodes.slice(0, -1);
+	      var idxA = nodes.indexOf(nodeId);
+	      var idxB = splitArea(nodes, idxA, graph);
+
+	      if (idxB < idxA) {
+	        nodesA = nodes.slice(idxA).concat(nodes.slice(0, idxB + 1));
+	        nodesB = nodes.slice(idxB, idxA + 1);
+	      } else {
+	        nodesA = nodes.slice(idxA, idxB + 1);
+	        nodesB = nodes.slice(idxB).concat(nodes.slice(0, idxA + 1));
 	      }
+	    } else {
+	      var idx = wayA.nodes.indexOf(nodeId, 1);
+	      nodesA = wayA.nodes.slice(0, idx + 1);
+	      nodesB = wayA.nodes.slice(idx);
 	    }
-	  };
 
-	  Tokenizer.prototype.hr = function hr (src) {
-	    var cap = this.rules.block.hr.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'hr',
-	        raw: cap[0]
-	      };
-	    }
-	  };
+	    var lengthA = totalLengthBetweenNodes(graph, nodesA);
+	    var lengthB = totalLengthBetweenNodes(graph, nodesB);
 
-	  Tokenizer.prototype.blockquote = function blockquote (src) {
-	    var cap = this.rules.block.blockquote.exec(src);
-	    if (cap) {
-	      var text = cap[0].replace(/^ *> ?/gm, '');
+	    if (_keepHistoryOn === 'longest' && lengthB > lengthA) {
+	      // keep the history on the longer way, regardless of the node count
+	      wayA = wayA.update({
+	        nodes: nodesB
+	      });
+	      wayB = wayB.update({
+	        nodes: nodesA
+	      });
+	      var temp = lengthA;
+	      lengthA = lengthB;
+	      lengthB = temp;
+	    } else {
+	      wayA = wayA.update({
+	        nodes: nodesA
+	      });
+	      wayB = wayB.update({
+	        nodes: nodesB
+	      });
+	    }
 
-	      return {
-	        type: 'blockquote',
-	        raw: cap[0],
-	        text: text
-	      };
+	    if (wayA.tags.step_count) {
+	      // divide up the the step count proportionally between the two ways
+	      var stepCount = parseFloat(wayA.tags.step_count);
+
+	      if (stepCount && // ensure a number
+	      isFinite(stepCount) && // ensure positive
+	      stepCount > 0 && // ensure integer
+	      Math.round(stepCount) === stepCount) {
+	        var tagsA = Object.assign({}, wayA.tags);
+	        var tagsB = Object.assign({}, wayB.tags);
+	        var ratioA = lengthA / (lengthA + lengthB);
+	        var countA = Math.round(stepCount * ratioA);
+	        tagsA.step_count = countA.toString();
+	        tagsB.step_count = (stepCount - countA).toString();
+	        wayA = wayA.update({
+	          tags: tagsA
+	        });
+	        wayB = wayB.update({
+	          tags: tagsB
+	        });
+	      }
 	    }
-	  };
 
-	  Tokenizer.prototype.list = function list (src) {
-	    var cap = this.rules.block.list.exec(src);
-	    if (cap) {
-	      var raw = cap[0];
-	      var bull = cap[2];
-	      var isordered = bull.length > 1;
+	    graph = graph.replace(wayA);
+	    graph = graph.replace(wayB);
+	    graph.parentRelations(wayA).forEach(function (relation) {
+	      var member; // Turn restrictions - make sure:
+	      // 1. Splitting a FROM/TO way - only `wayA` OR `wayB` remains in relation
+	      //    (whichever one is connected to the VIA node/ways)
+	      // 2. Splitting a VIA way - `wayB` remains in relation as a VIA way
 
-	      var list = {
-	        type: 'list',
-	        raw: raw,
-	        ordered: isordered,
-	        start: isordered ? +bull : '',
-	        loose: false,
-	        items: []
-	      };
+	      if (relation.hasFromViaTo()) {
+	        var f = relation.memberByRole('from');
+	        var v = relation.membersByRole('via');
+	        var t = relation.memberByRole('to');
+	        var i; // 1. split a FROM/TO
 
-	      // Get each top-level item.
-	      var itemMatch = cap[0].match(this.rules.block.item);
+	        if (f.id === wayA.id || t.id === wayA.id) {
+	          var keepB = false;
 
-	      var next = false,
-	        item,
-	        space,
-	        b,
-	        addBack,
-	        loose,
-	        istask,
-	        ischecked;
+	          if (v.length === 1 && v[0].type === 'node') {
+	            // check via node
+	            keepB = wayB.contains(v[0].id);
+	          } else {
+	            // check via way(s)
+	            for (i = 0; i < v.length; i++) {
+	              if (v[i].type === 'way') {
+	                var wayVia = graph.hasEntity(v[i].id);
+
+	                if (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
+	                  keepB = true;
+	                  break;
+	                }
+	              }
+	            }
+	          }
 
-	      var l = itemMatch.length;
-	      for (var i = 0; i < l; i++) {
-	        item = itemMatch[i];
-	        raw = item;
+	          if (keepB) {
+	            relation = relation.replaceMember(wayA, wayB);
+	            graph = graph.replace(relation);
+	          } // 2. split a VIA
 
-	        // Remove the list item's bullet
-	        // so it is seen as the next token.
-	        space = item.length;
-	        item = item.replace(/^ *([*+-]|\d+\.) */, '');
+	        } else {
+	          for (i = 0; i < v.length; i++) {
+	            if (v[i].type === 'way' && v[i].id === wayA.id) {
+	              member = {
+	                id: wayB.id,
+	                type: 'way',
+	                role: 'via'
+	              };
+	              graph = actionAddMember(relation.id, member, v[i].index + 1)(graph);
+	              break;
+	            }
+	          }
+	        } // All other relations (Routes, Multipolygons, etc):
+	        // 1. Both `wayA` and `wayB` remain in the relation
+	        // 2. But must be inserted as a pair (see `actionAddMember` for details)
 
-	        // Outdent whatever the
-	        // list item contains. Hacky.
-	        if (~item.indexOf('\n ')) {
-	          space -= item.length;
-	          item = !this.options.pedantic
-	            ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '')
-	            : item.replace(/^ {1,4}/gm, '');
+	      } else {
+	        if (relation === isOuter) {
+	          graph = graph.replace(relation.mergeTags(wayA.tags));
+	          graph = graph.replace(wayA.update({
+	            tags: {}
+	          }));
+	          graph = graph.replace(wayB.update({
+	            tags: {}
+	          }));
 	        }
 
-	        // Determine whether the next list item belongs here.
-	        // Backpedal if it does not belong in this list.
-	        if (i !== l - 1) {
-	          b = this.rules.block.bullet.exec(itemMatch[i + 1])[0];
-	          if (bull.length > 1 ? b.length === 1
-	            : (b.length > 1 || (this.options.smartLists && b !== bull))) {
-	            addBack = itemMatch.slice(i + 1).join('\n');
-	            list.raw = list.raw.substring(0, list.raw.length - addBack.length);
-	            i = l - 1;
-	          }
-	        }
+	        member = {
+	          id: wayB.id,
+	          type: 'way',
+	          role: relation.memberById(wayA.id).role
+	        };
+	        var insertPair = {
+	          originalID: wayA.id,
+	          insertedID: wayB.id,
+	          nodes: origNodes
+	        };
+	        graph = actionAddMember(relation.id, member, undefined, insertPair)(graph);
+	      }
+	    });
 
-	        // Determine whether item is loose or not.
-	        // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
-	        // for discount behavior.
-	        loose = next || /\n\n(?!\s*$)/.test(item);
-	        if (i !== l - 1) {
-	          next = item.charAt(item.length - 1) === '\n';
-	          if (!loose) { loose = next; }
-	        }
+	    if (!isOuter && isArea) {
+	      var multipolygon = osmRelation({
+	        tags: Object.assign({}, wayA.tags, {
+	          type: 'multipolygon'
+	        }),
+	        members: [{
+	          id: wayA.id,
+	          role: 'outer',
+	          type: 'way'
+	        }, {
+	          id: wayB.id,
+	          role: 'outer',
+	          type: 'way'
+	        }]
+	      });
+	      graph = graph.replace(multipolygon);
+	      graph = graph.replace(wayA.update({
+	        tags: {}
+	      }));
+	      graph = graph.replace(wayB.update({
+	        tags: {}
+	      }));
+	    }
 
-	        if (loose) {
-	          list.loose = true;
-	        }
+	    _createdWayIDs.push(wayB.id);
 
-	        // Check for task list items
-	        istask = /^\[[ xX]\] /.test(item);
-	        ischecked = undefined;
-	        if (istask) {
-	          ischecked = item[1] !== ' ';
-	          item = item.replace(/^\[[ xX]\] +/, '');
-	        }
+	    return graph;
+	  }
 
-	        list.items.push({
-	          raw: raw,
-	          task: istask,
-	          checked: ischecked,
-	          loose: loose,
-	          text: item
-	        });
-	      }
+	  var action = function action(graph) {
+	    _createdWayIDs = [];
+	    var newWayIndex = 0;
 
-	      return list;
-	    }
-	  };
+	    for (var i = 0; i < nodeIds.length; i++) {
+	      var nodeId = nodeIds[i];
+	      var candidates = action.waysForNode(nodeId, graph);
 
-	  Tokenizer.prototype.html = function html (src) {
-	    var cap = this.rules.block.html.exec(src);
-	    if (cap) {
-	      return {
-	        type: this.options.sanitize
-	          ? 'paragraph'
-	          : 'html',
-	        raw: cap[0],
-	        pre: !this.options.sanitizer
-	          && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
-	        text: this.options.sanitize ? (this.options.sanitizer ? this.options.sanitizer(cap[0]) : escape$2(cap[0])) : cap[0]
-	      };
+	      for (var j = 0; j < candidates.length; j++) {
+	        graph = split(graph, nodeId, candidates[j], newWayIds && newWayIds[newWayIndex]);
+	        newWayIndex += 1;
+	      }
 	    }
+
+	    return graph;
 	  };
 
-	  Tokenizer.prototype.def = function def (src) {
-	    var cap = this.rules.block.def.exec(src);
-	    if (cap) {
-	      if (cap[3]) { cap[3] = cap[3].substring(1, cap[3].length - 1); }
-	      var tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
-	      return {
-	        tag: tag,
-	        raw: cap[0],
-	        href: cap[2],
-	        title: cap[3]
-	      };
-	    }
+	  action.getCreatedWayIDs = function () {
+	    return _createdWayIDs;
 	  };
 
-	  Tokenizer.prototype.table = function table (src) {
-	    var cap = this.rules.block.table.exec(src);
-	    if (cap) {
-	      var item = {
-	        type: 'table',
-	        header: splitCells$1(cap[1].replace(/^ *| *\| *$/g, '')),
-	        align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
-	        cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
-	      };
+	  action.waysForNode = function (nodeId, graph) {
+	    var node = graph.entity(nodeId);
+	    var splittableParents = graph.parentWays(node).filter(isSplittable);
 
-	      if (item.header.length === item.align.length) {
-	        item.raw = cap[0];
+	    if (!_wayIDs) {
+	      // If the ways to split aren't specified, only split the lines.
+	      // If there are no lines to split, split the areas.
+	      var hasLine = splittableParents.some(function (parent) {
+	        return parent.geometry(graph) === 'line';
+	      });
 
-	        var l = item.align.length;
-	        var i;
-	        for (i = 0; i < l; i++) {
-	          if (/^ *-+: *$/.test(item.align[i])) {
-	            item.align[i] = 'right';
-	          } else if (/^ *:-+: *$/.test(item.align[i])) {
-	            item.align[i] = 'center';
-	          } else if (/^ *:-+ *$/.test(item.align[i])) {
-	            item.align[i] = 'left';
-	          } else {
-	            item.align[i] = null;
-	          }
-	        }
+	      if (hasLine) {
+	        return splittableParents.filter(function (parent) {
+	          return parent.geometry(graph) === 'line';
+	        });
+	      }
+	    }
 
-	        l = item.cells.length;
-	        for (i = 0; i < l; i++) {
-	          item.cells[i] = splitCells$1(
-	            item.cells[i].replace(/^ *\| *| *\| *$/g, ''),
-	            item.header.length);
-	        }
+	    return splittableParents;
 
-	        return item;
+	    function isSplittable(parent) {
+	      // If the ways to split are specified, ignore everything else.
+	      if (_wayIDs && _wayIDs.indexOf(parent.id) === -1) return false; // We can fake splitting closed ways at their endpoints...
+
+	      if (parent.isClosed()) return true; // otherwise, we can't split nodes at their endpoints.
+
+	      for (var i = 1; i < parent.nodes.length - 1; i++) {
+	        if (parent.nodes[i] === nodeId) return true;
 	      }
+
+	      return false;
 	    }
 	  };
 
-	  Tokenizer.prototype.lheading = function lheading (src) {
-	    var cap = this.rules.block.lheading.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'heading',
-	        raw: cap[0],
-	        depth: cap[2].charAt(0) === '=' ? 1 : 2,
-	        text: cap[1]
-	      };
-	    }
+	  action.ways = function (graph) {
+	    return utilArrayUniq([].concat.apply([], nodeIds.map(function (nodeId) {
+	      return action.waysForNode(nodeId, graph);
+	    })));
 	  };
 
-	  Tokenizer.prototype.paragraph = function paragraph (src) {
-	    var cap = this.rules.block.paragraph.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'paragraph',
-	        raw: cap[0],
-	        text: cap[1].charAt(cap[1].length - 1) === '\n'
-	          ? cap[1].slice(0, -1)
-	          : cap[1]
-	      };
+	  action.disabled = function (graph) {
+	    for (var i = 0; i < nodeIds.length; i++) {
+	      var nodeId = nodeIds[i];
+	      var candidates = action.waysForNode(nodeId, graph);
+
+	      if (candidates.length === 0 || _wayIDs && _wayIDs.length !== candidates.length) {
+	        return 'not_eligible';
+	      }
 	    }
 	  };
 
-	  Tokenizer.prototype.text = function text (src) {
-	    var cap = this.rules.block.text.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'text',
-	        raw: cap[0],
-	        text: cap[0]
-	      };
-	    }
+	  action.limitWays = function (val) {
+	    if (!arguments.length) return _wayIDs;
+	    _wayIDs = val;
+	    return action;
 	  };
 
-	  Tokenizer.prototype.escape = function escape$1 (src) {
-	    var cap = this.rules.inline.escape.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'escape',
-	        raw: cap[0],
-	        text: escape$2(cap[1])
-	      };
-	    }
+	  action.keepHistoryOn = function (val) {
+	    if (!arguments.length) return _keepHistoryOn;
+	    _keepHistoryOn = val;
+	    return action;
 	  };
 
-	  Tokenizer.prototype.tag = function tag (src, inLink, inRawBlock) {
-	    var cap = this.rules.inline.tag.exec(src);
-	    if (cap) {
-	      if (!inLink && /^<a /i.test(cap[0])) {
-	        inLink = true;
-	      } else if (inLink && /^<\/a>/i.test(cap[0])) {
-	        inLink = false;
-	      }
-	      if (!inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
-	        inRawBlock = true;
-	      } else if (inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
-	        inRawBlock = false;
-	      }
+	  return action;
+	}
 
-	      return {
-	        type: this.options.sanitize
-	          ? 'text'
-	          : 'html',
-	        raw: cap[0],
-	        inLink: inLink,
-	        inRawBlock: inRawBlock,
-	        text: this.options.sanitize
-	          ? (this.options.sanitizer
-	            ? this.options.sanitizer(cap[0])
-	            : escape$2(cap[0]))
-	          : cap[0]
-	      };
-	    }
-	  };
+	function coreGraph(other, mutable) {
+	  if (!(this instanceof coreGraph)) return new coreGraph(other, mutable);
 
-	  Tokenizer.prototype.link = function link (src) {
-	    var cap = this.rules.inline.link.exec(src);
-	    if (cap) {
-	      var lastParenIndex = findClosingBracket$1(cap[2], '()');
-	      if (lastParenIndex > -1) {
-	        var start = cap[0].indexOf('!') === 0 ? 5 : 4;
-	        var linkLen = start + cap[1].length + lastParenIndex;
-	        cap[2] = cap[2].substring(0, lastParenIndex);
-	        cap[0] = cap[0].substring(0, linkLen).trim();
-	        cap[3] = '';
-	      }
-	      var href = cap[2];
-	      var title = '';
-	      if (this.options.pedantic) {
-	        var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
+	  if (other instanceof coreGraph) {
+	    var base = other.base();
+	    this.entities = Object.assign(Object.create(base.entities), other.entities);
+	    this._parentWays = Object.assign(Object.create(base.parentWays), other._parentWays);
+	    this._parentRels = Object.assign(Object.create(base.parentRels), other._parentRels);
+	  } else {
+	    this.entities = Object.create({});
+	    this._parentWays = Object.create({});
+	    this._parentRels = Object.create({});
+	    this.rebase(other || [], [this]);
+	  }
 
-	        if (link) {
-	          href = link[1];
-	          title = link[3];
-	        } else {
-	          title = '';
-	        }
-	      } else {
-	        title = cap[3] ? cap[3].slice(1, -1) : '';
-	      }
-	      href = href.trim().replace(/^<([\s\S]*)>$/, '$1');
-	      var token = outputLink(cap, {
-	        href: href ? href.replace(this.rules.inline._escapes, '$1') : href,
-	        title: title ? title.replace(this.rules.inline._escapes, '$1') : title
-	      }, cap[0]);
-	      return token;
-	    }
-	  };
+	  this.transients = {};
+	  this._childNodes = {};
+	  this.frozen = !mutable;
+	}
+	coreGraph.prototype = {
+	  hasEntity: function hasEntity(id) {
+	    return this.entities[id];
+	  },
+	  entity: function entity(id) {
+	    var entity = this.entities[id]; //https://github.com/openstreetmap/iD/issues/3973#issuecomment-307052376
 
-	  Tokenizer.prototype.reflink = function reflink (src, links) {
-	    var cap;
-	    if ((cap = this.rules.inline.reflink.exec(src))
-	        || (cap = this.rules.inline.nolink.exec(src))) {
-	      var link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
-	      link = links[link.toLowerCase()];
-	      if (!link || !link.href) {
-	        var text = cap[0].charAt(0);
-	        return {
-	          type: 'text',
-	          raw: text,
-	          text: text
-	        };
-	      }
-	      var token = outputLink(cap, link, cap[0]);
-	      return token;
+	    if (!entity) {
+	      entity = this.entities.__proto__[id]; // eslint-disable-line no-proto
 	    }
-	  };
 
-	  Tokenizer.prototype.strong = function strong (src) {
-	    var cap = this.rules.inline.strong.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'strong',
-	        raw: cap[0],
-	        text: cap[4] || cap[3] || cap[2] || cap[1]
-	      };
+	    if (!entity) {
+	      throw new Error('entity ' + id + ' not found');
 	    }
-	  };
 
-	  Tokenizer.prototype.em = function em (src) {
-	    var cap = this.rules.inline.em.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'em',
-	        raw: cap[0],
-	        text: cap[6] || cap[5] || cap[4] || cap[3] || cap[2] || cap[1]
-	      };
+	    return entity;
+	  },
+	  geometry: function geometry(id) {
+	    return this.entity(id).geometry(this);
+	  },
+	  "transient": function transient(entity, key, fn) {
+	    var id = entity.id;
+	    var transients = this.transients[id] || (this.transients[id] = {});
+
+	    if (transients[key] !== undefined) {
+	      return transients[key];
 	    }
-	  };
 
-	  Tokenizer.prototype.codespan = function codespan (src) {
-	    var cap = this.rules.inline.code.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'codespan',
-	        raw: cap[0],
-	        text: escape$2(cap[2].trim(), true)
-	      };
+	    transients[key] = fn.call(entity);
+	    return transients[key];
+	  },
+	  parentWays: function parentWays(entity) {
+	    var parents = this._parentWays[entity.id];
+	    var result = [];
+
+	    if (parents) {
+	      parents.forEach(function (id) {
+	        result.push(this.entity(id));
+	      }, this);
 	    }
-	  };
 
-	  Tokenizer.prototype.br = function br (src) {
-	    var cap = this.rules.inline.br.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'br',
-	        raw: cap[0]
-	      };
+	    return result;
+	  },
+	  isPoi: function isPoi(entity) {
+	    var parents = this._parentWays[entity.id];
+	    return !parents || parents.size === 0;
+	  },
+	  isShared: function isShared(entity) {
+	    var parents = this._parentWays[entity.id];
+	    return parents && parents.size > 1;
+	  },
+	  parentRelations: function parentRelations(entity) {
+	    var parents = this._parentRels[entity.id];
+	    var result = [];
+
+	    if (parents) {
+	      parents.forEach(function (id) {
+	        result.push(this.entity(id));
+	      }, this);
 	    }
-	  };
 
-	  Tokenizer.prototype.del = function del (src) {
-	    var cap = this.rules.inline.del.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'del',
-	        raw: cap[0],
-	        text: cap[1]
-	      };
+	    return result;
+	  },
+	  parentMultipolygons: function parentMultipolygons(entity) {
+	    return this.parentRelations(entity).filter(function (relation) {
+	      return relation.isMultipolygon();
+	    });
+	  },
+	  childNodes: function childNodes(entity) {
+	    if (this._childNodes[entity.id]) return this._childNodes[entity.id];
+	    if (!entity.nodes) return [];
+	    var nodes = [];
+
+	    for (var i = 0; i < entity.nodes.length; i++) {
+	      nodes[i] = this.entity(entity.nodes[i]);
 	    }
-	  };
+	    this._childNodes[entity.id] = nodes;
+	    return this._childNodes[entity.id];
+	  },
+	  base: function base() {
+	    return {
+	      'entities': Object.getPrototypeOf(this.entities),
+	      'parentWays': Object.getPrototypeOf(this._parentWays),
+	      'parentRels': Object.getPrototypeOf(this._parentRels)
+	    };
+	  },
+	  // Unlike other graph methods, rebase mutates in place. This is because it
+	  // is used only during the history operation that merges newly downloaded
+	  // data into each state. To external consumers, it should appear as if the
+	  // graph always contained the newly downloaded data.
+	  rebase: function rebase(entities, stack, force) {
+	    var base = this.base();
+	    var i, j, k, id;
 
-	  Tokenizer.prototype.autolink = function autolink (src, mangle) {
-	    var cap = this.rules.inline.autolink.exec(src);
-	    if (cap) {
-	      var text, href;
-	      if (cap[2] === '@') {
-	        text = escape$2(this.options.mangle ? mangle(cap[1]) : cap[1]);
-	        href = 'mailto:' + text;
-	      } else {
-	        text = escape$2(cap[1]);
-	        href = text;
-	      }
+	    for (i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (!entity.visible || !force && base.entities[entity.id]) continue; // Merging data into the base graph
 
-	      return {
-	        type: 'link',
-	        raw: cap[0],
-	        text: text,
-	        href: href,
-	        tokens: [
-	          {
-	            type: 'text',
-	            raw: text,
-	            text: text
+	      base.entities[entity.id] = entity;
+
+	      this._updateCalculated(undefined, entity, base.parentWays, base.parentRels); // Restore provisionally-deleted nodes that are discovered to have an extant parent
+
+
+	      if (entity.type === 'way') {
+	        for (j = 0; j < entity.nodes.length; j++) {
+	          id = entity.nodes[j];
+
+	          for (k = 1; k < stack.length; k++) {
+	            var ents = stack[k].entities;
+
+	            if (ents.hasOwnProperty(id) && ents[id] === undefined) {
+	              delete ents[id];
+	            }
 	          }
-	        ]
-	      };
+	        }
+	      }
 	    }
-	  };
 
-	  Tokenizer.prototype.url = function url (src, mangle) {
-	    var cap;
-	    if (cap = this.rules.inline.url.exec(src)) {
-	      var text, href;
-	      if (cap[2] === '@') {
-	        text = escape$2(this.options.mangle ? mangle(cap[0]) : cap[0]);
-	        href = 'mailto:' + text;
-	      } else {
-	        // do extended autolink path validation
-	        var prevCapZero;
-	        do {
-	          prevCapZero = cap[0];
-	          cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
-	        } while (prevCapZero !== cap[0]);
-	        text = escape$2(cap[0]);
-	        if (cap[1] === 'www.') {
-	          href = 'http://' + text;
-	        } else {
-	          href = text;
-	        }
+	    for (i = 0; i < stack.length; i++) {
+	      stack[i]._updateRebased();
+	    }
+	  },
+	  _updateRebased: function _updateRebased() {
+	    var base = this.base();
+	    Object.keys(this._parentWays).forEach(function (child) {
+	      if (base.parentWays[child]) {
+	        base.parentWays[child].forEach(function (id) {
+	          if (!this.entities.hasOwnProperty(id)) {
+	            this._parentWays[child].add(id);
+	          }
+	        }, this);
 	      }
-	      return {
-	        type: 'link',
-	        raw: cap[0],
-	        text: text,
-	        href: href,
-	        tokens: [
-	          {
-	            type: 'text',
-	            raw: text,
-	            text: text
+	    }, this);
+	    Object.keys(this._parentRels).forEach(function (child) {
+	      if (base.parentRels[child]) {
+	        base.parentRels[child].forEach(function (id) {
+	          if (!this.entities.hasOwnProperty(id)) {
+	            this._parentRels[child].add(id);
 	          }
-	        ]
-	      };
-	    }
-	  };
+	        }, this);
+	      }
+	    }, this);
+	    this.transients = {}; // this._childNodes is not updated, under the assumption that
+	    // ways are always downloaded with their child nodes.
+	  },
+	  // Updates calculated properties (parentWays, parentRels) for the specified change
+	  _updateCalculated: function _updateCalculated(oldentity, entity, parentWays, parentRels) {
+	    parentWays = parentWays || this._parentWays;
+	    parentRels = parentRels || this._parentRels;
+	    var type = entity && entity.type || oldentity && oldentity.type;
+	    var removed, added, i;
+
+	    if (type === 'way') {
+	      // Update parentWays
+	      if (oldentity && entity) {
+	        removed = utilArrayDifference(oldentity.nodes, entity.nodes);
+	        added = utilArrayDifference(entity.nodes, oldentity.nodes);
+	      } else if (oldentity) {
+	        removed = oldentity.nodes;
+	        added = [];
+	      } else if (entity) {
+	        removed = [];
+	        added = entity.nodes;
+	      }
 
-	  Tokenizer.prototype.inlineText = function inlineText (src, inRawBlock, smartypants) {
-	    var cap = this.rules.inline.text.exec(src);
-	    if (cap) {
-	      var text;
-	      if (inRawBlock) {
-	        text = this.options.sanitize ? (this.options.sanitizer ? this.options.sanitizer(cap[0]) : escape$2(cap[0])) : cap[0];
-	      } else {
-	        text = escape$2(this.options.smartypants ? smartypants(cap[0]) : cap[0]);
+	      for (i = 0; i < removed.length; i++) {
+	        // make a copy of prototype property, store as own property, and update..
+	        parentWays[removed[i]] = new Set(parentWays[removed[i]]);
+	        parentWays[removed[i]]["delete"](oldentity.id);
 	      }
-	      return {
-	        type: 'text',
-	        raw: cap[0],
-	        text: text
-	      };
-	    }
-	  };
 
-	  return Tokenizer;
-	}());
+	      for (i = 0; i < added.length; i++) {
+	        // make a copy of prototype property, store as own property, and update..
+	        parentWays[added[i]] = new Set(parentWays[added[i]]);
+	        parentWays[added[i]].add(entity.id);
+	      }
+	    } else if (type === 'relation') {
+	      // Update parentRels
+	      // diff only on the IDs since the same entity can be a member multiple times with different roles
+	      var oldentityMemberIDs = oldentity ? oldentity.members.map(function (m) {
+	        return m.id;
+	      }) : [];
+	      var entityMemberIDs = entity ? entity.members.map(function (m) {
+	        return m.id;
+	      }) : [];
+
+	      if (oldentity && entity) {
+	        removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
+	        added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
+	      } else if (oldentity) {
+	        removed = oldentityMemberIDs;
+	        added = [];
+	      } else if (entity) {
+	        removed = [];
+	        added = entityMemberIDs;
+	      }
 
-	var noopTest$1 = helpers.noopTest;
-	var edit$1 = helpers.edit;
-	var merge$2 = helpers.merge;
+	      for (i = 0; i < removed.length; i++) {
+	        // make a copy of prototype property, store as own property, and update..
+	        parentRels[removed[i]] = new Set(parentRels[removed[i]]);
+	        parentRels[removed[i]]["delete"](oldentity.id);
+	      }
 
-	/**
-	 * Block-Level Grammar
-	 */
-	var block = {
-	  newline: /^\n+/,
-	  code: /^( {4}[^\n]+\n*)+/,
-	  fences: /^ {0,3}(`{3,}(?=[^`\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?:\n+|$)|$)/,
-	  hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,
-	  heading: /^ {0,3}(#{1,6}) +([^\n]*?)(?: +#+)? *(?:\n+|$)/,
-	  blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
-	  list: /^( {0,3})(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,
-	  html: '^ {0,3}(?:' // optional indentation
-	    + '<(script|pre|style)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' // (1)
-	    + '|comment[^\\n]*(\\n+|$)' // (2)
-	    + '|<\\?[\\s\\S]*?\\?>\\n*' // (3)
-	    + '|<![A-Z][\\s\\S]*?>\\n*' // (4)
-	    + '|<!\\[CDATA\\[[\\s\\S]*?\\]\\]>\\n*' // (5)
-	    + '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:\\n{2,}|$)' // (6)
-	    + '|<(?!script|pre|style)([a-z][\\w-]*)(?:attribute)*? */?>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:\\n{2,}|$)' // (7) open tag
-	    + '|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:\\n{2,}|$)' // (7) closing tag
-	    + ')',
-	  def: /^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,
-	  nptable: noopTest$1,
-	  table: noopTest$1,
-	  lheading: /^([^\n]+)\n {0,3}(=+|-+) *(?:\n+|$)/,
-	  // regex template, placeholders will be replaced according to different paragraph
-	  // interruption rules of commonmark and the original markdown spec:
-	  _paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list|html)[^\n]+)*)/,
-	  text: /^[^\n]+/
-	};
+	      for (i = 0; i < added.length; i++) {
+	        // make a copy of prototype property, store as own property, and update..
+	        parentRels[added[i]] = new Set(parentRels[added[i]]);
+	        parentRels[added[i]].add(entity.id);
+	      }
+	    }
+	  },
+	  replace: function replace(entity) {
+	    if (this.entities[entity.id] === entity) return this;
+	    return this.update(function () {
+	      this._updateCalculated(this.entities[entity.id], entity);
 
-	block._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/;
-	block._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
-	block.def = edit$1(block.def)
-	  .replace('label', block._label)
-	  .replace('title', block._title)
-	  .getRegex();
-
-	block.bullet = /(?:[*+-]|\d{1,9}\.)/;
-	block.item = /^( *)(bull) ?[^\n]*(?:\n(?!\1bull ?)[^\n]*)*/;
-	block.item = edit$1(block.item, 'gm')
-	  .replace(/bull/g, block.bullet)
-	  .getRegex();
-
-	block.list = edit$1(block.list)
-	  .replace(/bull/g, block.bullet)
-	  .replace('hr', '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))')
-	  .replace('def', '\\n+(?=' + block.def.source + ')')
-	  .getRegex();
-
-	block._tag = 'address|article|aside|base|basefont|blockquote|body|caption'
-	  + '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption'
-	  + '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe'
-	  + '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option'
-	  + '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr'
-	  + '|track|ul';
-	block._comment = /<!--(?!-?>)[\s\S]*?-->/;
-	block.html = edit$1(block.html, 'i')
-	  .replace('comment', block._comment)
-	  .replace('tag', block._tag)
-	  .replace('attribute', / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/)
-	  .getRegex();
-
-	block.paragraph = edit$1(block._paragraph)
-	  .replace('hr', block.hr)
-	  .replace('heading', ' {0,3}#{1,6} ')
-	  .replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
-	  .replace('blockquote', ' {0,3}>')
-	  .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
-	  .replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
-	  .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)')
-	  .replace('tag', block._tag) // pars can be interrupted by type (6) html blocks
-	  .getRegex();
-
-	block.blockquote = edit$1(block.blockquote)
-	  .replace('paragraph', block.paragraph)
-	  .getRegex();
+	      this.entities[entity.id] = entity;
+	    });
+	  },
+	  remove: function remove(entity) {
+	    return this.update(function () {
+	      this._updateCalculated(entity, undefined);
 
-	/**
-	 * Normal Block Grammar
-	 */
+	      this.entities[entity.id] = undefined;
+	    });
+	  },
+	  revert: function revert(id) {
+	    var baseEntity = this.base().entities[id];
+	    var headEntity = this.entities[id];
+	    if (headEntity === baseEntity) return this;
+	    return this.update(function () {
+	      this._updateCalculated(headEntity, baseEntity);
+
+	      delete this.entities[id];
+	    });
+	  },
+	  update: function update() {
+	    var graph = this.frozen ? coreGraph(this, true) : this;
 
-	block.normal = merge$2({}, block);
+	    for (var i = 0; i < arguments.length; i++) {
+	      arguments[i].call(graph, graph);
+	    }
 
-	/**
-	 * GFM Block Grammar
-	 */
+	    if (this.frozen) graph.frozen = true;
+	    return graph;
+	  },
+	  // Obliterates any existing entities
+	  load: function load(entities) {
+	    var base = this.base();
+	    this.entities = Object.create(base.entities);
 
-	block.gfm = merge$2({}, block.normal, {
-	  nptable: '^ *([^|\\n ].*\\|.*)\\n' // Header
-	    + ' *([-:]+ *\\|[-| :]*)' // Align
-	    + '(?:\\n((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)', // Cells
-	  table: '^ *\\|(.+)\\n' // Header
-	    + ' *\\|?( *[-:]+[-| :]*)' // Align
-	    + '(?:\\n *((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)' // Cells
-	});
+	    for (var i in entities) {
+	      this.entities[i] = entities[i];
 
-	block.gfm.nptable = edit$1(block.gfm.nptable)
-	  .replace('hr', block.hr)
-	  .replace('heading', ' {0,3}#{1,6} ')
-	  .replace('blockquote', ' {0,3}>')
-	  .replace('code', ' {4}[^\\n]')
-	  .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
-	  .replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
-	  .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)')
-	  .replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
-	  .getRegex();
-
-	block.gfm.table = edit$1(block.gfm.table)
-	  .replace('hr', block.hr)
-	  .replace('heading', ' {0,3}#{1,6} ')
-	  .replace('blockquote', ' {0,3}>')
-	  .replace('code', ' {4}[^\\n]')
-	  .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
-	  .replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
-	  .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)')
-	  .replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
-	  .getRegex();
+	      this._updateCalculated(base.entities[i], this.entities[i]);
+	    }
 
-	/**
-	 * Pedantic grammar (original John Gruber's loose markdown specification)
-	 */
+	    return this;
+	  }
+	};
 
-	block.pedantic = merge$2({}, block.normal, {
-	  html: edit$1(
-	    '^ *(?:comment *(?:\\n|\\s*$)'
-	    + '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
-	    + '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))')
-	    .replace('comment', block._comment)
-	    .replace(/tag/g, '(?!(?:'
-	      + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub'
-	      + '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)'
-	      + '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b')
-	    .getRegex(),
-	  def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/,
-	  heading: /^ *(#{1,6}) *([^\n]+?) *(?:#+ *)?(?:\n+|$)/,
-	  fences: noopTest$1, // fences not supported
-	  paragraph: edit$1(block.normal._paragraph)
-	    .replace('hr', block.hr)
-	    .replace('heading', ' *#{1,6} *[^\n]')
-	    .replace('lheading', block.lheading)
-	    .replace('blockquote', ' {0,3}>')
-	    .replace('|fences', '')
-	    .replace('|list', '')
-	    .replace('|html', '')
-	    .getRegex()
-	});
+	function osmTurn(turn) {
+	  if (!(this instanceof osmTurn)) {
+	    return new osmTurn(turn);
+	  }
 
-	/**
-	 * Inline-Level Grammar
-	 */
-	var inline = {
-	  escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
-	  autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
-	  url: noopTest$1,
-	  tag: '^comment'
-	    + '|^</[a-zA-Z][\\w:-]*\\s*>' // self-closing tag
-	    + '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' // open tag
-	    + '|^<\\?[\\s\\S]*?\\?>' // processing instruction, e.g. <?php ?>
-	    + '|^<![a-zA-Z]+\\s[\\s\\S]*?>' // declaration, e.g. <!DOCTYPE html>
-	    + '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>', // CDATA section
-	  link: /^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,
-	  reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
-	  nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
-	  strong: /^__([^\s_])__(?!_)|^\*\*([^\s*])\*\*(?!\*)|^__([^\s][\s\S]*?[^\s])__(?!_)|^\*\*([^\s][\s\S]*?[^\s])\*\*(?!\*)/,
-	  em: /^_([^\s_])_(?!_)|^_([^\s_<][\s\S]*?[^\s_])_(?!_|[^\spunctuation])|^_([^\s_<][\s\S]*?[^\s])_(?!_|[^\spunctuation])|^\*([^\s*<\[])\*(?!\*)|^\*([^\s<"][\s\S]*?[^\s\[\*])\*(?![\]`punctuation])|^\*([^\s*"<\[][\s\S]*[^\s])\*(?!\*)/,
-	  code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
-	  br: /^( {2,}|\\)\n(?!\s*$)/,
-	  del: noopTest$1,
-	  text: /^(`+|[^`])(?:[\s\S]*?(?:(?=[\\<!\[`*]|\b_|$)|[^ ](?= {2,}\n))|(?= {2,}\n))/
-	};
+	  Object.assign(this, turn);
+	}
+	function osmIntersection(graph, startVertexId, maxDistance) {
+	  maxDistance = maxDistance || 30; // in meters
 
-	// list of punctuation marks from common mark spec
-	// without ` and ] to workaround Rule 17 (inline code blocks/links)
-	inline._punctuation = '!"#$%&\'()*+\\-./:;<=>?@\\[^_{|}~';
-	inline.em = edit$1(inline.em).replace(/punctuation/g, inline._punctuation).getRegex();
+	  var vgraph = coreGraph(); // virtual graph
 
-	inline._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
+	  var i, j, k;
 
-	inline._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;
-	inline._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;
-	inline.autolink = edit$1(inline.autolink)
-	  .replace('scheme', inline._scheme)
-	  .replace('email', inline._email)
-	  .getRegex();
+	  function memberOfRestriction(entity) {
+	    return graph.parentRelations(entity).some(function (r) {
+	      return r.isRestriction();
+	    });
+	  }
 
-	inline._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
+	  function isRoad(way) {
+	    if (way.isArea() || way.isDegenerate()) return false;
+	    var roads = {
+	      'motorway': true,
+	      'motorway_link': true,
+	      'trunk': true,
+	      'trunk_link': true,
+	      'primary': true,
+	      'primary_link': true,
+	      'secondary': true,
+	      'secondary_link': true,
+	      'tertiary': true,
+	      'tertiary_link': true,
+	      'residential': true,
+	      'unclassified': true,
+	      'living_street': true,
+	      'service': true,
+	      'road': true,
+	      'track': true
+	    };
+	    return roads[way.tags.highway];
+	  }
+
+	  var startNode = graph.entity(startVertexId);
+	  var checkVertices = [startNode];
+	  var checkWays;
+	  var vertices = [];
+	  var vertexIds = [];
+	  var vertex;
+	  var ways = [];
+	  var wayIds = [];
+	  var way;
+	  var nodes = [];
+	  var node;
+	  var parents = [];
+	  var parent; // `actions` will store whatever actions must be performed to satisfy
+	  // preconditions for adding a turn restriction to this intersection.
+	  //  - Remove any existing degenerate turn restrictions (missing from/to, etc)
+	  //  - Reverse oneways so that they are drawn in the forward direction
+	  //  - Split ways on key vertices
+
+	  var actions = []; // STEP 1:  walk the graph outwards from starting vertex to search
+	  //  for more key vertices and ways to include in the intersection..
+
+	  while (checkVertices.length) {
+	    vertex = checkVertices.pop(); // check this vertex for parent ways that are roads
+
+	    checkWays = graph.parentWays(vertex);
+	    var hasWays = false;
+
+	    for (i = 0; i < checkWays.length; i++) {
+	      way = checkWays[i];
+	      if (!isRoad(way) && !memberOfRestriction(way)) continue;
+	      ways.push(way); // it's a road, or it's already in a turn restriction
+
+	      hasWays = true; // check the way's children for more key vertices
+
+	      nodes = utilArrayUniq(graph.childNodes(way));
+
+	      for (j = 0; j < nodes.length; j++) {
+	        node = nodes[j];
+	        if (node === vertex) continue; // same thing
+
+	        if (vertices.indexOf(node) !== -1) continue; // seen it already
+
+	        if (geoSphericalDistance(node.loc, startNode.loc) > maxDistance) continue; // too far from start
+	        // a key vertex will have parents that are also roads
+
+	        var hasParents = false;
+	        parents = graph.parentWays(node);
+
+	        for (k = 0; k < parents.length; k++) {
+	          parent = parents[k];
+	          if (parent === way) continue; // same thing
+
+	          if (ways.indexOf(parent) !== -1) continue; // seen it already
+
+	          if (!isRoad(parent)) continue; // not a road
+
+	          hasParents = true;
+	          break;
+	        }
 
-	inline.tag = edit$1(inline.tag)
-	  .replace('comment', block._comment)
-	  .replace('attribute', inline._attribute)
-	  .getRegex();
+	        if (hasParents) {
+	          checkVertices.push(node);
+	        }
+	      }
+	    }
 
-	inline._label = /(?:\[[^\[\]]*\]|\\.|`[^`]*`|[^\[\]\\`])*?/;
-	inline._href = /<(?:\\[<>]?|[^\s<>\\])*>|[^\s\x00-\x1f]*/;
-	inline._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
+	    if (hasWays) {
+	      vertices.push(vertex);
+	    }
+	  }
 
-	inline.link = edit$1(inline.link)
-	  .replace('label', inline._label)
-	  .replace('href', inline._href)
-	  .replace('title', inline._title)
-	  .getRegex();
+	  vertices = utilArrayUniq(vertices);
+	  ways = utilArrayUniq(ways); // STEP 2:  Build a virtual graph containing only the entities in the intersection..
+	  // Everything done after this step should act on the virtual graph
+	  // Any actions that must be performed later to the main graph go in `actions` array
 
-	inline.reflink = edit$1(inline.reflink)
-	  .replace('label', inline._label)
-	  .getRegex();
+	  ways.forEach(function (way) {
+	    graph.childNodes(way).forEach(function (node) {
+	      vgraph = vgraph.replace(node);
+	    });
+	    vgraph = vgraph.replace(way);
+	    graph.parentRelations(way).forEach(function (relation) {
+	      if (relation.isRestriction()) {
+	        if (relation.isValidRestriction(graph)) {
+	          vgraph = vgraph.replace(relation);
+	        } else if (relation.isComplete(graph)) {
+	          actions.push(actionDeleteRelation(relation.id));
+	        }
+	      }
+	    });
+	  }); // STEP 3:  Force all oneways to be drawn in the forward direction
 
-	/**
-	 * Normal Inline Grammar
-	 */
+	  ways.forEach(function (w) {
+	    var way = vgraph.entity(w.id);
 
-	inline.normal = merge$2({}, inline);
+	    if (way.tags.oneway === '-1') {
+	      var action = actionReverse(way.id, {
+	        reverseOneway: true
+	      });
+	      actions.push(action);
+	      vgraph = action(vgraph);
+	    }
+	  }); // STEP 4:  Split ways on key vertices
+
+	  var origCount = osmEntity.id.next.way;
+	  vertices.forEach(function (v) {
+	    // This is an odd way to do it, but we need to find all the ways that
+	    // will be split here, then split them one at a time to ensure that these
+	    // actions can be replayed on the main graph exactly in the same order.
+	    // (It is unintuitive, but the order of ways returned from graph.parentWays()
+	    // is arbitrary, depending on how the main graph and vgraph were built)
+	    var splitAll = actionSplit([v.id]).keepHistoryOn('first');
+
+	    if (!splitAll.disabled(vgraph)) {
+	      splitAll.ways(vgraph).forEach(function (way) {
+	        var splitOne = actionSplit([v.id]).limitWays([way.id]).keepHistoryOn('first');
+	        actions.push(splitOne);
+	        vgraph = splitOne(vgraph);
+	      });
+	    }
+	  }); // In here is where we should also split the intersection at nearby junction.
+	  //   for https://github.com/mapbox/iD-internal/issues/31
+	  // nearbyVertices.forEach(function(v) {
+	  // });
+	  // Reasons why we reset the way id count here:
+	  //  1. Continuity with way ids created by the splits so that we can replay
+	  //     these actions later if the user decides to create a turn restriction
+	  //  2. Avoids churning way ids just by hovering over a vertex
+	  //     and displaying the turn restriction editor
 
-	/**
-	 * Pedantic Inline Grammar
-	 */
+	  osmEntity.id.next.way = origCount; // STEP 5:  Update arrays to point to vgraph entities
 
-	inline.pedantic = merge$2({}, inline.normal, {
-	  strong: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
-	  em: /^_(?=\S)([\s\S]*?\S)_(?!_)|^\*(?=\S)([\s\S]*?\S)\*(?!\*)/,
-	  link: edit$1(/^!?\[(label)\]\((.*?)\)/)
-	    .replace('label', inline._label)
-	    .getRegex(),
-	  reflink: edit$1(/^!?\[(label)\]\s*\[([^\]]*)\]/)
-	    .replace('label', inline._label)
-	    .getRegex()
-	});
+	  vertexIds = vertices.map(function (v) {
+	    return v.id;
+	  });
+	  vertices = [];
+	  ways = [];
+	  vertexIds.forEach(function (id) {
+	    var vertex = vgraph.entity(id);
+	    var parents = vgraph.parentWays(vertex);
+	    vertices.push(vertex);
+	    ways = ways.concat(parents);
+	  });
+	  vertices = utilArrayUniq(vertices);
+	  ways = utilArrayUniq(ways);
+	  vertexIds = vertices.map(function (v) {
+	    return v.id;
+	  });
+	  wayIds = ways.map(function (w) {
+	    return w.id;
+	  }); // STEP 6:  Update the ways with some metadata that will be useful for
+	  // walking the intersection graph later and rendering turn arrows.
 
-	/**
-	 * GFM Inline Grammar
-	 */
+	  function withMetadata(way, vertexIds) {
+	    var __oneWay = way.isOneWay(); // which affixes are key vertices?
 
-	inline.gfm = merge$2({}, inline.normal, {
-	  escape: edit$1(inline.escape).replace('])', '~|])').getRegex(),
-	  _extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,
-	  url: /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,
-	  _backpedal: /(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,
-	  del: /^~+(?=\S)([\s\S]*?\S)~+/,
-	  text: /^(`+|[^`])(?:[\s\S]*?(?:(?=[\\<!\[`*~]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))|(?= {2,}\n|[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))/
-	});
 
-	inline.gfm.url = edit$1(inline.gfm.url, 'i')
-	  .replace('email', inline.gfm._extended_email)
-	  .getRegex();
-	/**
-	 * GFM + Line Breaks Inline Grammar
-	 */
+	    var __first = vertexIds.indexOf(way.first()) !== -1;
 
-	inline.breaks = merge$2({}, inline.gfm, {
-	  br: edit$1(inline.br).replace('{2,}', '*').getRegex(),
-	  text: edit$1(inline.gfm.text)
-	    .replace('\\b_', '\\b_| {2,}\\n')
-	    .replace(/\{2,\}/g, '*')
-	    .getRegex()
-	});
+	    var __last = vertexIds.indexOf(way.last()) !== -1; // what roles is this way eligible for?
 
-	var rules = {
-	  block: block,
-	  inline: inline
-	};
 
-	var defaults$2 = defaults.defaults;
-	var block$1 = rules.block;
-	var inline$1 = rules.inline;
+	    var __via = __first && __last;
 
-	/**
-	 * smartypants text replacement
-	 */
-	function smartypants(text) {
-	  return text
-	    // em-dashes
-	    .replace(/---/g, '\u2014')
-	    // en-dashes
-	    .replace(/--/g, '\u2013')
-	    // opening singles
-	    .replace(/(^|[-\u2014/(\[{"\s])'/g, '$1\u2018')
-	    // closing singles & apostrophes
-	    .replace(/'/g, '\u2019')
-	    // opening doubles
-	    .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, '$1\u201c')
-	    // closing doubles
-	    .replace(/"/g, '\u201d')
-	    // ellipses
-	    .replace(/\.{3}/g, '\u2026');
-	}
+	    var __from = __first && !__oneWay || __last;
 
-	/**
-	 * mangle email addresses
-	 */
-	function mangle(text) {
-	  var out = '',
-	    i,
-	    ch;
+	    var __to = __first || __last && !__oneWay;
 
-	  var l = text.length;
-	  for (i = 0; i < l; i++) {
-	    ch = text.charCodeAt(i);
-	    if (Math.random() > 0.5) {
-	      ch = 'x' + ch.toString(16);
-	    }
-	    out += '&#' + ch + ';';
+	    return way.update({
+	      __first: __first,
+	      __last: __last,
+	      __from: __from,
+	      __via: __via,
+	      __to: __to,
+	      __oneWay: __oneWay
+	    });
 	  }
 
-	  return out;
-	}
+	  ways = [];
+	  wayIds.forEach(function (id) {
+	    var way = withMetadata(vgraph.entity(id), vertexIds);
+	    vgraph = vgraph.replace(way);
+	    ways.push(way);
+	  }); // STEP 7:  Simplify - This is an iterative process where we:
+	  //  1. Find trivial vertices with only 2 parents
+	  //  2. trim off the leaf way from those vertices and remove from vgraph
 
-	/**
-	 * Block Lexer
-	 */
-	var Lexer_1 = /*@__PURE__*/(function () {
-	  function Lexer(options) {
-	    this.tokens = [];
-	    this.tokens.links = Object.create(null);
-	    this.options = options || defaults$2;
-	    this.options.tokenizer = this.options.tokenizer || new Tokenizer_1();
-	    this.tokenizer = this.options.tokenizer;
-	    this.tokenizer.options = this.options;
+	  var keepGoing;
+	  var removeWayIds = [];
+	  var removeVertexIds = [];
 
-	    var rules = {
-	      block: block$1.normal,
-	      inline: inline$1.normal
-	    };
+	  do {
+	    keepGoing = false;
+	    checkVertices = vertexIds.slice();
 
-	    if (this.options.pedantic) {
-	      rules.block = block$1.pedantic;
-	      rules.inline = inline$1.pedantic;
-	    } else if (this.options.gfm) {
-	      rules.block = block$1.gfm;
-	      if (this.options.breaks) {
-	        rules.inline = inline$1.breaks;
-	      } else {
-	        rules.inline = inline$1.gfm;
-	      }
-	    }
-	    this.tokenizer.rules = rules;
-	  }
+	    for (i = 0; i < checkVertices.length; i++) {
+	      var vertexId = checkVertices[i];
+	      vertex = vgraph.hasEntity(vertexId);
 
-	  var staticAccessors = { rules: { configurable: true } };
+	      if (!vertex) {
+	        if (vertexIds.indexOf(vertexId) !== -1) {
+	          vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+	        }
 
-	  /**
-	   * Expose Rules
-	   */
-	  staticAccessors.rules.get = function () {
-	    return {
-	      block: block$1,
-	      inline: inline$1
-	    };
-	  };
+	        removeVertexIds.push(vertexId);
+	        continue;
+	      }
 
-	  /**
-	   * Static Lex Method
-	   */
-	  Lexer.lex = function lex (src, options) {
-	    var lexer = new Lexer(options);
-	    return lexer.lex(src);
-	  };
+	      parents = vgraph.parentWays(vertex);
 
-	  /**
-	   * Preprocessing
-	   */
-	  Lexer.prototype.lex = function lex (src) {
-	    src = src
-	      .replace(/\r\n|\r/g, '\n')
-	      .replace(/\t/g, '    ');
+	      if (parents.length < 3) {
+	        if (vertexIds.indexOf(vertexId) !== -1) {
+	          vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+	        }
+	      }
 
-	    this.blockTokens(src, this.tokens, true);
+	      if (parents.length === 2) {
+	        // vertex with 2 parents is trivial
+	        var a = parents[0];
+	        var b = parents[1];
+	        var aIsLeaf = a && !a.__via;
+	        var bIsLeaf = b && !b.__via;
+	        var leaf, survivor;
 
-	    this.inline(this.tokens);
+	        if (aIsLeaf && !bIsLeaf) {
+	          leaf = a;
+	          survivor = b;
+	        } else if (!aIsLeaf && bIsLeaf) {
+	          leaf = b;
+	          survivor = a;
+	        }
 
-	    return this.tokens;
-	  };
+	        if (leaf && survivor) {
+	          survivor = withMetadata(survivor, vertexIds); // update survivor way
 
-	  /**
-	   * Lexing
-	   */
-	  Lexer.prototype.blockTokens = function blockTokens (src, tokens, top) {
-	    if ( tokens === void 0 ) tokens = [];
-	    if ( top === void 0 ) top = true;
-
-	    src = src.replace(/^ +$/gm, '');
-	    var token, i, l;
-
-	    while (src) {
-	      // newline
-	      if (token = this.tokenizer.space(src)) {
-	        src = src.substring(token.raw.length);
-	        if (token.type) {
-	          tokens.push(token);
+	          vgraph = vgraph.replace(survivor).remove(leaf); // update graph
+
+	          removeWayIds.push(leaf.id);
+	          keepGoing = true;
 	        }
-	        continue;
 	      }
 
-	      // code
-	      if (token = this.tokenizer.code(src, tokens)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      parents = vgraph.parentWays(vertex);
 
-	      // fences
-	      if (token = this.tokenizer.fences(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      if (parents.length < 2) {
+	        // vertex is no longer a key vertex
+	        if (vertexIds.indexOf(vertexId) !== -1) {
+	          vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+	        }
 
-	      // heading
-	      if (token = this.tokenizer.heading(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
+	        removeVertexIds.push(vertexId);
+	        keepGoing = true;
 	      }
 
-	      // table no leading pipe (gfm)
-	      if (token = this.tokenizer.nptable(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
+	      if (parents.length < 1) {
+	        // vertex is no longer attached to anything
+	        vgraph = vgraph.remove(vertex);
 	      }
+	    }
+	  } while (keepGoing);
 
-	      // hr
-	      if (token = this.tokenizer.hr(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	  vertices = vertices.filter(function (vertex) {
+	    return removeVertexIds.indexOf(vertex.id) === -1;
+	  }).map(function (vertex) {
+	    return vgraph.entity(vertex.id);
+	  });
+	  ways = ways.filter(function (way) {
+	    return removeWayIds.indexOf(way.id) === -1;
+	  }).map(function (way) {
+	    return vgraph.entity(way.id);
+	  }); // OK!  Here is our intersection..
+
+	  var intersection = {
+	    graph: vgraph,
+	    actions: actions,
+	    vertices: vertices,
+	    ways: ways
+	  }; // Get all the valid turns through this intersection given a starting way id.
+	  // This operates on the virtual graph for everything.
+	  //
+	  // Basically, walk through all possible paths from starting way,
+	  //   honoring the existing turn restrictions as we go (watch out for loops!)
+	  //
+	  // For each path found, generate and return a `osmTurn` datastructure.
+	  //
 
-	      // blockquote
-	      if (token = this.tokenizer.blockquote(src)) {
-	        src = src.substring(token.raw.length);
-	        token.tokens = this.blockTokens(token.text, [], top);
-	        tokens.push(token);
-	        continue;
-	      }
+	  intersection.turns = function (fromWayId, maxViaWay) {
+	    if (!fromWayId) return [];
+	    if (!maxViaWay) maxViaWay = 0;
+	    var vgraph = intersection.graph;
+	    var keyVertexIds = intersection.vertices.map(function (v) {
+	      return v.id;
+	    });
+	    var start = vgraph.entity(fromWayId);
+	    if (!start || !(start.__from || start.__via)) return []; // maxViaWay=0   from-*-to              (0 vias)
+	    // maxViaWay=1   from-*-via-*-to        (1 via max)
+	    // maxViaWay=2   from-*-via-*-via-*-to  (2 vias max)
 
-	      // list
-	      if (token = this.tokenizer.list(src)) {
-	        src = src.substring(token.raw.length);
-	        l = token.items.length;
-	        for (i = 0; i < l; i++) {
-	          token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
-	        }
-	        tokens.push(token);
-	        continue;
-	      }
+	    var maxPathLength = maxViaWay * 2 + 3;
+	    var turns = [];
+	    step(start);
+	    return turns; // traverse the intersection graph and find all the valid paths
 
-	      // html
-	      if (token = this.tokenizer.html(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	    function step(entity, currPath, currRestrictions, matchedRestriction) {
+	      currPath = (currPath || []).slice(); // shallow copy
 
-	      // def
-	      if (top && (token = this.tokenizer.def(src))) {
-	        src = src.substring(token.raw.length);
-	        if (!this.tokens.links[token.tag]) {
-	          this.tokens.links[token.tag] = {
-	            href: token.href,
-	            title: token.title
-	          };
-	        }
-	        continue;
-	      }
+	      if (currPath.length >= maxPathLength) return;
+	      currPath.push(entity.id);
+	      currRestrictions = (currRestrictions || []).slice(); // shallow copy
 
-	      // table (gfm)
-	      if (token = this.tokenizer.table(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      var i, j;
 
-	      // lheading
-	      if (token = this.tokenizer.lheading(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      if (entity.type === 'node') {
+	        var parents = vgraph.parentWays(entity);
+	        var nextWays = []; // which ways can we step into?
 
-	      // top-level paragraph
-	      if (top && (token = this.tokenizer.paragraph(src))) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	        for (i = 0; i < parents.length; i++) {
+	          var way = parents[i]; // if next way is a oneway incoming to this vertex, skip
 
-	      // text
-	      if (token = this.tokenizer.text(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	          if (way.__oneWay && way.nodes[0] !== entity.id) continue; // if we have seen it before (allowing for an initial u-turn), skip
 
-	      if (src) {
-	        var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
-	        if (this.options.silent) {
-	          console.error(errMsg);
-	          break;
-	        } else {
-	          throw new Error(errMsg);
-	        }
-	      }
-	    }
+	          if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) continue; // Check all "current" restrictions (where we've already walked the `FROM`)
 
-	    return tokens;
-	  };
+	          var restrict = null;
 
-	  Lexer.prototype.inline = function inline (tokens) {
-	    var i,
-	      j,
-	      k,
-	      l2,
-	      row,
-	      token;
+	          for (j = 0; j < currRestrictions.length; j++) {
+	            var restriction = currRestrictions[j];
+	            var f = restriction.memberByRole('from');
+	            var v = restriction.membersByRole('via');
+	            var t = restriction.memberByRole('to');
+	            var isOnly = /^only_/.test(restriction.tags.restriction); // Does the current path match this turn restriction?
 
-	    var l = tokens.length;
-	    for (i = 0; i < l; i++) {
-	      token = tokens[i];
-	      switch (token.type) {
-	        case 'paragraph':
-	        case 'text':
-	        case 'heading': {
-	          token.tokens = [];
-	          this.inlineTokens(token.text, token.tokens);
-	          break;
-	        }
-	        case 'table': {
-	          token.tokens = {
-	            header: [],
-	            cells: []
-	          };
+	            var matchesFrom = f.id === fromWayId;
+	            var matchesViaTo = false;
+	            var isAlongOnlyPath = false;
+
+	            if (t.id === way.id) {
+	              // match TO
+	              if (v.length === 1 && v[0].type === 'node') {
+	                // match VIA node
+	                matchesViaTo = v[0].id === entity.id && (matchesFrom && currPath.length === 2 || !matchesFrom && currPath.length > 2);
+	              } else {
+	                // match all VIA ways
+	                var pathVias = [];
+
+	                for (k = 2; k < currPath.length; k += 2) {
+	                  // k = 2 skips FROM
+	                  pathVias.push(currPath[k]); // (path goes way-node-way...)
+	                }
+
+	                var restrictionVias = [];
+
+	                for (k = 0; k < v.length; k++) {
+	                  if (v[k].type === 'way') {
+	                    restrictionVias.push(v[k].id);
+	                  }
+	                }
 
-	          // header
-	          l2 = token.header.length;
-	          for (j = 0; j < l2; j++) {
-	            token.tokens.header[j] = [];
-	            this.inlineTokens(token.header[j], token.tokens.header[j]);
-	          }
-
-	          // cells
-	          l2 = token.cells.length;
-	          for (j = 0; j < l2; j++) {
-	            row = token.cells[j];
-	            token.tokens.cells[j] = [];
-	            for (k = 0; k < row.length; k++) {
-	              token.tokens.cells[j][k] = [];
-	              this.inlineTokens(row[k], token.tokens.cells[j][k]);
+	                var diff = utilArrayDifference(pathVias, restrictionVias);
+	                matchesViaTo = !diff.length;
+	              }
+	            } else if (isOnly) {
+	              for (k = 0; k < v.length; k++) {
+	                // way doesn't match TO, but is one of the via ways along the path of an "only"
+	                if (v[k].type === 'way' && v[k].id === way.id) {
+	                  isAlongOnlyPath = true;
+	                  break;
+	                }
+	              }
 	            }
+
+	            if (matchesViaTo) {
+	              if (isOnly) {
+	                restrict = {
+	                  id: restriction.id,
+	                  direct: matchesFrom,
+	                  from: f.id,
+	                  only: true,
+	                  end: true
+	                };
+	              } else {
+	                restrict = {
+	                  id: restriction.id,
+	                  direct: matchesFrom,
+	                  from: f.id,
+	                  no: true,
+	                  end: true
+	                };
+	              }
+	            } else {
+	              // indirect - caused by a different nearby restriction
+	              if (isAlongOnlyPath) {
+	                restrict = {
+	                  id: restriction.id,
+	                  direct: false,
+	                  from: f.id,
+	                  only: true,
+	                  end: false
+	                };
+	              } else if (isOnly) {
+	                restrict = {
+	                  id: restriction.id,
+	                  direct: false,
+	                  from: f.id,
+	                  no: true,
+	                  end: true
+	                };
+	              }
+	            } // stop looking if we find a "direct" restriction (matching FROM, VIA, TO)
+
+
+	            if (restrict && restrict.direct) break;
 	          }
 
-	          break;
-	        }
-	        case 'blockquote': {
-	          this.inline(token.tokens);
-	          break;
+	          nextWays.push({
+	            way: way,
+	            restrict: restrict
+	          });
 	        }
-	        case 'list': {
-	          l2 = token.items.length;
-	          for (j = 0; j < l2; j++) {
-	            this.inline(token.items[j].tokens);
+
+	        nextWays.forEach(function (nextWay) {
+	          step(nextWay.way, currPath, currRestrictions, nextWay.restrict);
+	        });
+	      } else {
+	        // entity.type === 'way'
+	        if (currPath.length >= 3) {
+	          // this is a "complete" path..
+	          var turnPath = currPath.slice(); // shallow copy
+	          // an indirect restriction - only include the partial path (starting at FROM)
+
+	          if (matchedRestriction && matchedRestriction.direct === false) {
+	            for (i = 0; i < turnPath.length; i++) {
+	              if (turnPath[i] === matchedRestriction.from) {
+	                turnPath = turnPath.slice(i);
+	                break;
+	              }
+	            }
 	          }
-	          break;
+
+	          var turn = pathToTurn(turnPath);
+
+	          if (turn) {
+	            if (matchedRestriction) {
+	              turn.restrictionID = matchedRestriction.id;
+	              turn.no = matchedRestriction.no;
+	              turn.only = matchedRestriction.only;
+	              turn.direct = matchedRestriction.direct;
+	            }
+
+	            turns.push(osmTurn(turn));
+	          }
+
+	          if (currPath[0] === currPath[2]) return; // if we made a u-turn - stop here
 	        }
-	      }
-	    }
 
-	    return tokens;
-	  };
+	        if (matchedRestriction && matchedRestriction.end) return; // don't advance any further
+	        // which nodes can we step into?
 
-	  /**
-	   * Lexing/Compiling
-	   */
-	  Lexer.prototype.inlineTokens = function inlineTokens (src, tokens, inLink, inRawBlock) {
-	    if ( tokens === void 0 ) tokens = [];
-	    if ( inLink === void 0 ) inLink = false;
-	    if ( inRawBlock === void 0 ) inRawBlock = false;
-
-	    var token;
-
-	    while (src) {
-	      // escape
-	      if (token = this.tokenizer.escape(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	        var n1 = vgraph.entity(entity.first());
+	        var n2 = vgraph.entity(entity.last());
+	        var dist = geoSphericalDistance(n1.loc, n2.loc);
+	        var nextNodes = [];
 
-	      // tag
-	      if (token = this.tokenizer.tag(src, inLink, inRawBlock)) {
-	        src = src.substring(token.raw.length);
-	        inLink = token.inLink;
-	        inRawBlock = token.inRawBlock;
-	        tokens.push(token);
-	        continue;
-	      }
+	        if (currPath.length > 1) {
+	          if (dist > maxDistance) return; // the next node is too far
 
-	      // link
-	      if (token = this.tokenizer.link(src)) {
-	        src = src.substring(token.raw.length);
-	        if (token.type === 'link') {
-	          token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+	          if (!entity.__via) return; // this way is a leaf / can't be a via
 	        }
-	        tokens.push(token);
-	        continue;
-	      }
 
-	      // reflink, nolink
-	      if (token = this.tokenizer.reflink(src, this.tokens.links)) {
-	        src = src.substring(token.raw.length);
-	        if (token.type === 'link') {
-	          token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+	        if (!entity.__oneWay && // bidirectional..
+	        keyVertexIds.indexOf(n1.id) !== -1 && // key vertex..
+	        currPath.indexOf(n1.id) === -1) {
+	          // haven't seen it yet..
+	          nextNodes.push(n1); // can advance to first node
 	        }
-	        tokens.push(token);
-	        continue;
-	      }
-
-	      // strong
-	      if (token = this.tokenizer.strong(src)) {
-	        src = src.substring(token.raw.length);
-	        token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-	        tokens.push(token);
-	        continue;
-	      }
 
-	      // em
-	      if (token = this.tokenizer.em(src)) {
-	        src = src.substring(token.raw.length);
-	        token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-	        tokens.push(token);
-	        continue;
-	      }
+	        if (keyVertexIds.indexOf(n2.id) !== -1 && // key vertex..
+	        currPath.indexOf(n2.id) === -1) {
+	          // haven't seen it yet..
+	          nextNodes.push(n2); // can advance to last node
+	        }
 
-	      // code
-	      if (token = this.tokenizer.codespan(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	        nextNodes.forEach(function (nextNode) {
+	          // gather restrictions FROM this way
+	          var fromRestrictions = vgraph.parentRelations(entity).filter(function (r) {
+	            if (!r.isRestriction()) return false;
+	            var f = r.memberByRole('from');
+	            if (!f || f.id !== entity.id) return false;
+	            var isOnly = /^only_/.test(r.tags.restriction);
+	            if (!isOnly) return true; // `only_` restrictions only matter along the direction of the VIA - #4849
 
-	      // br
-	      if (token = this.tokenizer.br(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	            var isOnlyVia = false;
+	            var v = r.membersByRole('via');
 
-	      // del (gfm)
-	      if (token = this.tokenizer.del(src)) {
-	        src = src.substring(token.raw.length);
-	        token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-	        tokens.push(token);
-	        continue;
-	      }
+	            if (v.length === 1 && v[0].type === 'node') {
+	              // via node
+	              isOnlyVia = v[0].id === nextNode.id;
+	            } else {
+	              // via way(s)
+	              for (var i = 0; i < v.length; i++) {
+	                if (v[i].type !== 'way') continue;
+	                var viaWay = vgraph.entity(v[i].id);
+
+	                if (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
+	                  isOnlyVia = true;
+	                  break;
+	                }
+	              }
+	            }
 
-	      // autolink
-	      if (token = this.tokenizer.autolink(src, mangle)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
+	            return isOnlyVia;
+	          });
+	          step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
+	        });
 	      }
-
-	      // url (gfm)
-	      if (!inLink && (token = this.tokenizer.url(src, mangle))) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
+	    } // assumes path is alternating way-node-way of odd length
+
+
+	    function pathToTurn(path) {
+	      if (path.length < 3) return;
+	      var fromWayId, fromNodeId, fromVertexId;
+	      var toWayId, toNodeId, toVertexId;
+	      var viaWayIds, viaNodeId, isUturn;
+	      fromWayId = path[0];
+	      toWayId = path[path.length - 1];
+
+	      if (path.length === 3 && fromWayId === toWayId) {
+	        // u turn
+	        var way = vgraph.entity(fromWayId);
+	        if (way.__oneWay) return null;
+	        isUturn = true;
+	        viaNodeId = fromVertexId = toVertexId = path[1];
+	        fromNodeId = toNodeId = adjacentNode(fromWayId, viaNodeId);
+	      } else {
+	        isUturn = false;
+	        fromVertexId = path[1];
+	        fromNodeId = adjacentNode(fromWayId, fromVertexId);
+	        toVertexId = path[path.length - 2];
+	        toNodeId = adjacentNode(toWayId, toVertexId);
+
+	        if (path.length === 3) {
+	          viaNodeId = path[1];
+	        } else {
+	          viaWayIds = path.filter(function (entityId) {
+	            return entityId[0] === 'w';
+	          });
+	          viaWayIds = viaWayIds.slice(1, viaWayIds.length - 1); // remove first, last
+	        }
 	      }
 
-	      // text
-	      if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      return {
+	        key: path.join('_'),
+	        path: path,
+	        from: {
+	          node: fromNodeId,
+	          way: fromWayId,
+	          vertex: fromVertexId
+	        },
+	        via: {
+	          node: viaNodeId,
+	          ways: viaWayIds
+	        },
+	        to: {
+	          node: toNodeId,
+	          way: toWayId,
+	          vertex: toVertexId
+	        },
+	        u: isUturn
+	      };
 
-	      if (src) {
-	        var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
-	        if (this.options.silent) {
-	          console.error(errMsg);
-	          break;
-	        } else {
-	          throw new Error(errMsg);
-	        }
+	      function adjacentNode(wayId, affixId) {
+	        var nodes = vgraph.entity(wayId).nodes;
+	        return affixId === nodes[0] ? nodes[1] : nodes[nodes.length - 2];
 	      }
 	    }
-
-	    return tokens;
 	  };
 
-	  Object.defineProperties( Lexer, staticAccessors );
-
-	  return Lexer;
-	}());
-
-	var defaults$3 = defaults.defaults;
-	var cleanUrl$1 = helpers.cleanUrl;
-	var escape$3 = helpers.escape;
+	  return intersection;
+	}
+	function osmInferRestriction(graph, turn, projection) {
+	  var fromWay = graph.entity(turn.from.way);
+	  var fromNode = graph.entity(turn.from.node);
+	  var fromVertex = graph.entity(turn.from.vertex);
+	  var toWay = graph.entity(turn.to.way);
+	  var toNode = graph.entity(turn.to.node);
+	  var toVertex = graph.entity(turn.to.vertex);
+	  var fromOneWay = fromWay.tags.oneway === 'yes';
+	  var toOneWay = toWay.tags.oneway === 'yes';
+	  var angle = (geoAngle(fromVertex, fromNode, projection) - geoAngle(toVertex, toNode, projection)) * 180 / Math.PI;
 
-	/**
-	 * Renderer
-	 */
-	var Renderer_1 = /*@__PURE__*/(function () {
-	  function Renderer(options) {
-	    this.options = options || defaults$3;
+	  while (angle < 0) {
+	    angle += 360;
 	  }
 
-	  Renderer.prototype.code = function code (code$1, infostring, escaped) {
-	    var lang = (infostring || '').match(/\S*/)[0];
-	    if (this.options.highlight) {
-	      var out = this.options.highlight(code$1, lang);
-	      if (out != null && out !== code$1) {
-	        escaped = true;
-	        code$1 = out;
-	      }
-	    }
-
-	    if (!lang) {
-	      return '<pre><code>'
-	        + (escaped ? code$1 : escape$3(code$1, true))
-	        + '</code></pre>';
-	    }
+	  if (fromNode === toNode) {
+	    return 'no_u_turn';
+	  }
 
-	    return '<pre><code class="'
-	      + this.options.langPrefix
-	      + escape$3(lang, true)
-	      + '">'
-	      + (escaped ? code$1 : escape$3(code$1, true))
-	      + '</code></pre>\n';
-	  };
+	  if ((angle < 23 || angle > 336) && fromOneWay && toOneWay) {
+	    return 'no_u_turn'; // wider tolerance for u-turn if both ways are oneway
+	  }
 
-	  Renderer.prototype.blockquote = function blockquote (quote) {
-	    return '<blockquote>\n' + quote + '</blockquote>\n';
-	  };
+	  if ((angle < 40 || angle > 319) && fromOneWay && toOneWay && turn.from.vertex !== turn.to.vertex) {
+	    return 'no_u_turn'; // even wider tolerance for u-turn if there is a via way (from !== to)
+	  }
 
-	  Renderer.prototype.html = function html (html$1) {
-	    return html$1;
-	  };
+	  if (angle < 158) {
+	    return 'no_right_turn';
+	  }
 
-	  Renderer.prototype.heading = function heading (text, level, raw, slugger) {
-	    if (this.options.headerIds) {
-	      return '<h'
-	        + level
-	        + ' id="'
-	        + this.options.headerPrefix
-	        + slugger.slug(raw)
-	        + '">'
-	        + text
-	        + '</h'
-	        + level
-	        + '>\n';
-	    }
-	    // ignore IDs
-	    return '<h' + level + '>' + text + '</h' + level + '>\n';
-	  };
+	  if (angle > 202) {
+	    return 'no_left_turn';
+	  }
 
-	  Renderer.prototype.hr = function hr () {
-	    return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
-	  };
+	  return 'no_straight_on';
+	}
 
-	  Renderer.prototype.list = function list (body, ordered, start) {
-	    var type = ordered ? 'ol' : 'ul',
-	      startatt = (ordered && start !== 1) ? (' start="' + start + '"') : '';
-	    return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
-	  };
+	function actionMergePolygon(ids, newRelationId) {
+	  function groupEntities(graph) {
+	    var entities = ids.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    var geometryGroups = utilArrayGroupBy(entities, function (entity) {
+	      if (entity.type === 'way' && entity.isClosed()) {
+	        return 'closedWay';
+	      } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+	        return 'multipolygon';
+	      } else {
+	        return 'other';
+	      }
+	    });
+	    return Object.assign({
+	      closedWay: [],
+	      multipolygon: [],
+	      other: []
+	    }, geometryGroups);
+	  }
 
-	  Renderer.prototype.listitem = function listitem (text) {
-	    return '<li>' + text + '</li>\n';
-	  };
+	  var action = function action(graph) {
+	    var entities = groupEntities(graph); // An array representing all the polygons that are part of the multipolygon.
+	    //
+	    // Each element is itself an array of objects with an id property, and has a
+	    // locs property which is an array of the locations forming the polygon.
+
+	    var polygons = entities.multipolygon.reduce(function (polygons, m) {
+	      return polygons.concat(osmJoinWays(m.members, graph));
+	    }, []).concat(entities.closedWay.map(function (d) {
+	      var member = [{
+	        id: d.id
+	      }];
+	      member.nodes = graph.childNodes(d);
+	      return member;
+	    })); // contained is an array of arrays of boolean values,
+	    // where contained[j][k] is true iff the jth way is
+	    // contained by the kth way.
+
+	    var contained = polygons.map(function (w, i) {
+	      return polygons.map(function (d, n) {
+	        if (i === n) return null;
+	        return geoPolygonContainsPolygon(d.nodes.map(function (n) {
+	          return n.loc;
+	        }), w.nodes.map(function (n) {
+	          return n.loc;
+	        }));
+	      });
+	    }); // Sort all polygons as either outer or inner ways
 
-	  Renderer.prototype.checkbox = function checkbox (checked) {
-	    return '<input '
-	      + (checked ? 'checked="" ' : '')
-	      + 'disabled="" type="checkbox"'
-	      + (this.options.xhtml ? ' /' : '')
-	      + '> ';
-	  };
+	    var members = [];
+	    var outer = true;
 
-	  Renderer.prototype.paragraph = function paragraph (text) {
-	    return '<p>' + text + '</p>\n';
-	  };
+	    while (polygons.length) {
+	      extractUncontained(polygons);
+	      polygons = polygons.filter(isContained);
+	      contained = contained.filter(isContained).map(filterContained);
+	    }
 
-	  Renderer.prototype.table = function table (header, body) {
-	    if (body) { body = '<tbody>' + body + '</tbody>'; }
+	    function isContained(d, i) {
+	      return contained[i].some(function (val) {
+	        return val;
+	      });
+	    }
 
-	    return '<table>\n'
-	      + '<thead>\n'
-	      + header
-	      + '</thead>\n'
-	      + body
-	      + '</table>\n';
-	  };
+	    function filterContained(d) {
+	      return d.filter(isContained);
+	    }
 
-	  Renderer.prototype.tablerow = function tablerow (content) {
-	    return '<tr>\n' + content + '</tr>\n';
-	  };
+	    function extractUncontained(polygons) {
+	      polygons.forEach(function (d, i) {
+	        if (!isContained(d, i)) {
+	          d.forEach(function (member) {
+	            members.push({
+	              type: 'way',
+	              id: member.id,
+	              role: outer ? 'outer' : 'inner'
+	            });
+	          });
+	        }
+	      });
+	      outer = !outer;
+	    } // Move all tags to one relation.
+	    // Keep the oldest multipolygon alive if it exists.
 
-	  Renderer.prototype.tablecell = function tablecell (content, flags) {
-	    var type = flags.header ? 'th' : 'td';
-	    var tag = flags.align
-	      ? '<' + type + ' align="' + flags.align + '">'
-	      : '<' + type + '>';
-	    return tag + content + '</' + type + '>\n';
-	  };
 
-	  // span level renderer
-	  Renderer.prototype.strong = function strong (text) {
-	    return '<strong>' + text + '</strong>';
-	  };
+	    var relation;
 
-	  Renderer.prototype.em = function em (text) {
-	    return '<em>' + text + '</em>';
-	  };
+	    if (entities.multipolygon.length > 0) {
+	      var oldestID = utilOldestID(entities.multipolygon.map(function (entity) {
+	        return entity.id;
+	      }));
+	      relation = entities.multipolygon.find(function (entity) {
+	        return entity.id === oldestID;
+	      });
+	    } else {
+	      relation = osmRelation({
+	        id: newRelationId,
+	        tags: {
+	          type: 'multipolygon'
+	        }
+	      });
+	    }
 
-	  Renderer.prototype.codespan = function codespan (text) {
-	    return '<code>' + text + '</code>';
-	  };
+	    entities.multipolygon.forEach(function (m) {
+	      if (m.id !== relation.id) {
+	        relation = relation.mergeTags(m.tags);
+	        graph = graph.remove(m);
+	      }
+	    });
+	    entities.closedWay.forEach(function (way) {
+	      function isThisOuter(m) {
+	        return m.id === way.id && m.role !== 'inner';
+	      }
 
-	  Renderer.prototype.br = function br () {
-	    return this.options.xhtml ? '<br/>' : '<br>';
+	      if (members.some(isThisOuter)) {
+	        relation = relation.mergeTags(way.tags);
+	        graph = graph.replace(way.update({
+	          tags: {}
+	        }));
+	      }
+	    });
+	    return graph.replace(relation.update({
+	      members: members,
+	      tags: utilObjectOmit(relation.tags, ['area'])
+	    }));
 	  };
 
-	  Renderer.prototype.del = function del (text) {
-	    return '<del>' + text + '</del>';
-	  };
+	  action.disabled = function (graph) {
+	    var entities = groupEntities(graph);
 
-	  Renderer.prototype.link = function link (href, title, text) {
-	    href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
-	    if (href === null) {
-	      return text;
-	    }
-	    var out = '<a href="' + escape$3(href) + '"';
-	    if (title) {
-	      out += ' title="' + title + '"';
+	    if (entities.other.length > 0 || entities.closedWay.length + entities.multipolygon.length < 2) {
+	      return 'not_eligible';
 	    }
-	    out += '>' + text + '</a>';
-	    return out;
-	  };
 
-	  Renderer.prototype.image = function image (href, title, text) {
-	    href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
-	    if (href === null) {
-	      return text;
+	    if (!entities.multipolygon.every(function (r) {
+	      return r.isComplete(graph);
+	    })) {
+	      return 'incomplete_relation';
 	    }
 
-	    var out = '<img src="' + href + '" alt="' + text + '"';
-	    if (title) {
-	      out += ' title="' + title + '"';
+	    if (!entities.multipolygon.length) {
+	      var sharedMultipolygons = [];
+	      entities.closedWay.forEach(function (way, i) {
+	        if (i === 0) {
+	          sharedMultipolygons = graph.parentMultipolygons(way);
+	        } else {
+	          sharedMultipolygons = utilArrayIntersection(sharedMultipolygons, graph.parentMultipolygons(way));
+	        }
+	      });
+	      sharedMultipolygons = sharedMultipolygons.filter(function (relation) {
+	        return relation.members.length === entities.closedWay.length;
+	      });
+
+	      if (sharedMultipolygons.length) {
+	        // don't create a new multipolygon if it'd be redundant
+	        return 'not_eligible';
+	      }
+	    } else if (entities.closedWay.some(function (way) {
+	      return utilArrayIntersection(graph.parentMultipolygons(way), entities.multipolygon).length;
+	    })) {
+	      // don't add a way to a multipolygon again if it's already a member
+	      return 'not_eligible';
 	    }
-	    out += this.options.xhtml ? '/>' : '>';
-	    return out;
 	  };
 
-	  Renderer.prototype.text = function text (text$1) {
-	    return text$1;
-	  };
+	  return action;
+	}
 
-	  return Renderer;
-	}());
+	var DESCRIPTORS$1 = descriptors;
+	var objectDefinePropertyModule = objectDefineProperty;
+	var regExpFlags = regexpFlags$1;
+	var fails$4 = fails$V;
 
-	/**
-	 * TextRenderer
-	 * returns only the textual part of the token
-	 */
-	var TextRenderer_1 = /*@__PURE__*/(function () {
-	  function TextRenderer () {}
+	var RegExpPrototype = RegExp.prototype;
 
-	  TextRenderer.prototype.strong = function strong (text) {
-	    return text;
-	  };
+	var FORCED$2 = DESCRIPTORS$1 && fails$4(function () {
+	  // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+	  return Object.getOwnPropertyDescriptor(RegExpPrototype, 'flags').get.call({ dotAll: true, sticky: true }) !== 'sy';
+	});
 
-	  TextRenderer.prototype.em = function em (text) {
-	    return text;
-	  };
+	// `RegExp.prototype.flags` getter
+	// https://tc39.es/ecma262/#sec-get-regexp.prototype.flags
+	if (FORCED$2) objectDefinePropertyModule.f(RegExpPrototype, 'flags', {
+	  configurable: true,
+	  get: regExpFlags
+	});
 
-	  TextRenderer.prototype.codespan = function codespan (text) {
-	    return text;
-	  };
+	var fastDeepEqual = function equal(a, b) {
+	  if (a === b) return true;
 
-	  TextRenderer.prototype.del = function del (text) {
-	    return text;
-	  };
+	  if (a && b && _typeof(a) == 'object' && _typeof(b) == 'object') {
+	    if (a.constructor !== b.constructor) return false;
+	    var length, i, keys;
 
-	  TextRenderer.prototype.html = function html (text) {
-	    return text;
-	  };
+	    if (Array.isArray(a)) {
+	      length = a.length;
+	      if (length != b.length) return false;
 
-	  TextRenderer.prototype.text = function text (text$1) {
-	    return text$1;
-	  };
+	      for (i = length; i-- !== 0;) {
+	        if (!equal(a[i], b[i])) return false;
+	      }
 
-	  TextRenderer.prototype.link = function link (href, title, text) {
-	    return '' + text;
-	  };
+	      return true;
+	    }
 
-	  TextRenderer.prototype.image = function image (href, title, text) {
-	    return '' + text;
-	  };
+	    if (a.constructor === RegExp) return a.source === b.source && a.flags === b.flags;
+	    if (a.valueOf !== Object.prototype.valueOf) return a.valueOf() === b.valueOf();
+	    if (a.toString !== Object.prototype.toString) return a.toString() === b.toString();
+	    keys = Object.keys(a);
+	    length = keys.length;
+	    if (length !== Object.keys(b).length) return false;
 
-	  TextRenderer.prototype.br = function br () {
-	    return '';
-	  };
+	    for (i = length; i-- !== 0;) {
+	      if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
+	    }
 
-	  return TextRenderer;
-	}());
+	    for (i = length; i-- !== 0;) {
+	      var key = keys[i];
+	      if (!equal(a[key], b[key])) return false;
+	    }
 
-	/**
-	 * Slugger generates header id
-	 */
-	var Slugger_1 = /*@__PURE__*/(function () {
-	  function Slugger() {
-	    this.seen = {};
-	  }
+	    return true;
+	  } // true if both NaN, false otherwise
 
-	  /**
-	   * Convert string to unique id
-	   */
-	  Slugger.prototype.slug = function slug (value) {
-	    var slug = value
-	      .toLowerCase()
-	      .trim()
-	      // remove html tags
-	      .replace(/<[!\/a-z].*?>/ig, '')
-	      // remove unwanted chars
-	      .replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g, '')
-	      .replace(/\s/g, '-');
-
-	    if (this.seen.hasOwnProperty(slug)) {
-	      var originalSlug = slug;
-	      do {
-	        this.seen[originalSlug]++;
-	        slug = originalSlug + '-' + this.seen[originalSlug];
-	      } while (this.seen.hasOwnProperty(slug));
-	    }
-	    this.seen[slug] = 0;
 
-	    return slug;
-	  };
+	  return a !== a && b !== b;
+	};
 
-	  return Slugger;
-	}());
+	// J. W. Hunt and M. D. McIlroy, An algorithm for differential buffer
+	// comparison, Bell Telephone Laboratories CSTR #41 (1976)
+	// http://www.cs.dartmouth.edu/~doug/
+	// https://en.wikipedia.org/wiki/Longest_common_subsequence_problem
+	//
+	// Expects two arrays, finds longest common sequence
 
-	var defaults$4 = defaults.defaults;
-	var unescape$2 = helpers.unescape;
+	function LCS(buffer1, buffer2) {
+	  var equivalenceClasses = {};
 
-	/**
-	 * Parsing & Compiling
-	 */
-	var Parser_1 = /*@__PURE__*/(function () {
-	  function Parser(options) {
-	    this.options = options || defaults$4;
-	    this.options.renderer = this.options.renderer || new Renderer_1();
-	    this.renderer = this.options.renderer;
-	    this.renderer.options = this.options;
-	    this.textRenderer = new TextRenderer_1();
-	    this.slugger = new Slugger_1();
+	  for (var j = 0; j < buffer2.length; j++) {
+	    var item = buffer2[j];
+
+	    if (equivalenceClasses[item]) {
+	      equivalenceClasses[item].push(j);
+	    } else {
+	      equivalenceClasses[item] = [j];
+	    }
 	  }
 
-	  /**
-	   * Static Parse Method
-	   */
-	  Parser.parse = function parse (tokens, options) {
-	    var parser = new Parser(options);
-	    return parser.parse(tokens);
+	  var NULLRESULT = {
+	    buffer1index: -1,
+	    buffer2index: -1,
+	    chain: null
 	  };
+	  var candidates = [NULLRESULT];
 
-	  /**
-	   * Parse Loop
-	   */
-	  Parser.prototype.parse = function parse (tokens, top) {
-	    if ( top === void 0 ) top = true;
+	  for (var i = 0; i < buffer1.length; i++) {
+	    var _item = buffer1[i];
+	    var buffer2indices = equivalenceClasses[_item] || [];
+	    var r = 0;
+	    var c = candidates[0];
 
-	    var out = '',
-	      i,
-	      j,
-	      k,
-	      l2,
-	      l3,
-	      row,
-	      cell,
-	      header,
-	      body,
-	      token,
-	      ordered,
-	      start,
-	      loose,
-	      itemBody,
-	      item,
-	      checked,
-	      task,
-	      checkbox;
-
-	    var l = tokens.length;
-	    for (i = 0; i < l; i++) {
-	      token = tokens[i];
-	      switch (token.type) {
-	        case 'space': {
-	          continue;
-	        }
-	        case 'hr': {
-	          out += this.renderer.hr();
-	          continue;
-	        }
-	        case 'heading': {
-	          out += this.renderer.heading(
-	            this.parseInline(token.tokens),
-	            token.depth,
-	            unescape$2(this.parseInline(token.tokens, this.textRenderer)),
-	            this.slugger);
-	          continue;
-	        }
-	        case 'code': {
-	          out += this.renderer.code(token.text,
-	            token.lang,
-	            token.escaped);
-	          continue;
-	        }
-	        case 'table': {
-	          header = '';
-
-	          // header
-	          cell = '';
-	          l2 = token.header.length;
-	          for (j = 0; j < l2; j++) {
-	            cell += this.renderer.tablecell(
-	              this.parseInline(token.tokens.header[j]),
-	              { header: true, align: token.align[j] }
-	            );
-	          }
-	          header += this.renderer.tablerow(cell);
-
-	          body = '';
-	          l2 = token.cells.length;
-	          for (j = 0; j < l2; j++) {
-	            row = token.tokens.cells[j];
-
-	            cell = '';
-	            l3 = row.length;
-	            for (k = 0; k < l3; k++) {
-	              cell += this.renderer.tablecell(
-	                this.parseInline(row[k]),
-	                { header: false, align: token.align[k] }
-	              );
-	            }
+	    for (var jx = 0; jx < buffer2indices.length; jx++) {
+	      var _j = buffer2indices[jx];
+	      var s = void 0;
 
-	            body += this.renderer.tablerow(cell);
-	          }
-	          out += this.renderer.table(header, body);
-	          continue;
-	        }
-	        case 'blockquote': {
-	          body = this.parse(token.tokens);
-	          out += this.renderer.blockquote(body);
-	          continue;
+	      for (s = r; s < candidates.length; s++) {
+	        if (candidates[s].buffer2index < _j && (s === candidates.length - 1 || candidates[s + 1].buffer2index > _j)) {
+	          break;
 	        }
-	        case 'list': {
-	          ordered = token.ordered;
-	          start = token.start;
-	          loose = token.loose;
-	          l2 = token.items.length;
-
-	          body = '';
-	          for (j = 0; j < l2; j++) {
-	            item = token.items[j];
-	            checked = item.checked;
-	            task = item.task;
-
-	            itemBody = '';
-	            if (item.task) {
-	              checkbox = this.renderer.checkbox(checked);
-	              if (loose) {
-	                if (item.tokens[0].type === 'text') {
-	                  item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
-	                  if (item.tokens[0].tokens && item.tokens[0].tokens.length > 0 && item.tokens[0].tokens[0].type === 'text') {
-	                    item.tokens[0].tokens[0].text = checkbox + ' ' + item.tokens[0].tokens[0].text;
-	                  }
-	                } else {
-	                  item.tokens.unshift({
-	                    type: 'text',
-	                    text: checkbox
-	                  });
-	                }
-	              } else {
-	                itemBody += checkbox;
-	              }
-	            }
+	      }
 
-	            itemBody += this.parse(item.tokens, loose);
-	            body += this.renderer.listitem(itemBody, task, checked);
-	          }
+	      if (s < candidates.length) {
+	        var newCandidate = {
+	          buffer1index: i,
+	          buffer2index: _j,
+	          chain: candidates[s]
+	        };
 
-	          out += this.renderer.list(body, ordered, start);
-	          continue;
-	        }
-	        case 'html': {
-	          // TODO parse inline content if parameter markdown=1
-	          out += this.renderer.html(token.text);
-	          continue;
-	        }
-	        case 'paragraph': {
-	          out += this.renderer.paragraph(this.parseInline(token.tokens));
-	          continue;
-	        }
-	        case 'text': {
-	          body = token.tokens ? this.parseInline(token.tokens) : token.text;
-	          while (i + 1 < l && tokens[i + 1].type === 'text') {
-	            token = tokens[++i];
-	            body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
-	          }
-	          out += top ? this.renderer.paragraph(body) : body;
-	          continue;
-	        }
-	        default: {
-	          var errMsg = 'Token with "' + token.type + '" type was not found.';
-	          if (this.options.silent) {
-	            console.error(errMsg);
-	            return;
-	          } else {
-	            throw new Error(errMsg);
-	          }
+	        if (r === candidates.length) {
+	          candidates.push(c);
+	        } else {
+	          candidates[r] = c;
 	        }
-	      }
-	    }
-
-	    return out;
-	  };
 
-	  /**
-	   * Parse Inline Tokens
-	   */
-	  Parser.prototype.parseInline = function parseInline (tokens, renderer) {
-	    renderer = renderer || this.renderer;
-	    var out = '',
-	      i,
-	      token;
+	        r = s + 1;
+	        c = newCandidate;
 
-	    var l = tokens.length;
-	    for (i = 0; i < l; i++) {
-	      token = tokens[i];
-	      switch (token.type) {
-	        case 'escape': {
-	          out += renderer.text(token.text);
-	          break;
-	        }
-	        case 'html': {
-	          out += renderer.html(token.text);
-	          break;
-	        }
-	        case 'link': {
-	          out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
-	          break;
-	        }
-	        case 'image': {
-	          out += renderer.image(token.href, token.title, token.text);
-	          break;
-	        }
-	        case 'strong': {
-	          out += renderer.strong(this.parseInline(token.tokens, renderer));
-	          break;
-	        }
-	        case 'em': {
-	          out += renderer.em(this.parseInline(token.tokens, renderer));
-	          break;
-	        }
-	        case 'codespan': {
-	          out += renderer.codespan(token.text);
-	          break;
-	        }
-	        case 'br': {
-	          out += renderer.br();
-	          break;
-	        }
-	        case 'del': {
-	          out += renderer.del(this.parseInline(token.tokens, renderer));
-	          break;
-	        }
-	        case 'text': {
-	          out += renderer.text(token.text);
-	          break;
-	        }
-	        default: {
-	          var errMsg = 'Token with "' + token.type + '" type was not found.';
-	          if (this.options.silent) {
-	            console.error(errMsg);
-	            return;
-	          } else {
-	            throw new Error(errMsg);
-	          }
+	        if (r === candidates.length) {
+	          break; // no point in examining further (j)s
 	        }
 	      }
 	    }
-	    return out;
-	  };
 
-	  return Parser;
-	}());
+	    candidates[r] = c;
+	  } // At this point, we know the LCS: it's in the reverse of the
+	  // linked-list through .chain of candidates[candidates.length - 1].
 
-	var merge$3 = helpers.merge;
-	var checkSanitizeDeprecation$1 = helpers.checkSanitizeDeprecation;
-	var escape$4 = helpers.escape;
-	var getDefaults = defaults.getDefaults;
-	var changeDefaults = defaults.changeDefaults;
-	var defaults$5 = defaults.defaults;
 
-	/**
-	 * Marked
-	 */
-	function marked(src, opt, callback) {
-	  // throw error in case of non string input
-	  if (typeof src === 'undefined' || src === null) {
-	    throw new Error('marked(): input parameter is undefined or null');
-	  }
-	  if (typeof src !== 'string') {
-	    throw new Error('marked(): input parameter is of type '
-	      + Object.prototype.toString.call(src) + ', string expected');
-	  }
+	  return candidates[candidates.length - 1];
+	} // We apply the LCS to build a 'comm'-style picture of the
+	// offsets and lengths of mismatched chunks in the input
+	// buffers. This is used by diff3MergeRegions.
 
-	  if (callback || typeof opt === 'function') {
-	    if (!callback) {
-	      callback = opt;
-	      opt = null;
-	    }
 
-	    opt = merge$3({}, marked.defaults, opt || {});
-	    checkSanitizeDeprecation$1(opt);
-	    var highlight = opt.highlight;
-	    var tokens,
-	      pending,
-	      i = 0;
+	function diffIndices(buffer1, buffer2) {
+	  var lcs = LCS(buffer1, buffer2);
+	  var result = [];
+	  var tail1 = buffer1.length;
+	  var tail2 = buffer2.length;
 
-	    try {
-	      tokens = Lexer_1.lex(src, opt);
-	    } catch (e) {
-	      return callback(e);
+	  for (var candidate = lcs; candidate !== null; candidate = candidate.chain) {
+	    var mismatchLength1 = tail1 - candidate.buffer1index - 1;
+	    var mismatchLength2 = tail2 - candidate.buffer2index - 1;
+	    tail1 = candidate.buffer1index;
+	    tail2 = candidate.buffer2index;
+
+	    if (mismatchLength1 || mismatchLength2) {
+	      result.push({
+	        buffer1: [tail1 + 1, mismatchLength1],
+	        buffer1Content: buffer1.slice(tail1 + 1, tail1 + 1 + mismatchLength1),
+	        buffer2: [tail2 + 1, mismatchLength2],
+	        buffer2Content: buffer2.slice(tail2 + 1, tail2 + 1 + mismatchLength2)
+	      });
 	    }
+	  }
 
-	    pending = tokens.length;
+	  result.reverse();
+	  return result;
+	} // We apply the LCS to build a JSON representation of a
+	// independently derived from O, returns a fairly complicated
+	// internal representation of merge decisions it's taken. The
+	// interested reader may wish to consult
+	//
+	// Sanjeev Khanna, Keshav Kunal, and Benjamin C. Pierce.
+	// 'A Formal Investigation of ' In Arvind and Prasad,
+	// editors, Foundations of Software Technology and Theoretical
+	// Computer Science (FSTTCS), December 2007.
+	//
+	// (http://www.cis.upenn.edu/~bcpierce/papers/diff3-short.pdf)
+	//
 
-	    var done = function(err) {
-	      if (err) {
-	        opt.highlight = highlight;
-	        return callback(err);
-	      }
 
-	      var out;
+	function diff3MergeRegions(a, o, b) {
+	  // "hunks" are array subsets where `a` or `b` are different from `o`
+	  // https://www.gnu.org/software/diffutils/manual/html_node/diff3-Hunks.html
+	  var hunks = [];
 
-	      try {
-	        out = Parser_1.parse(tokens, opt);
-	      } catch (e) {
-	        err = e;
-	      }
+	  function addHunk(h, ab) {
+	    hunks.push({
+	      ab: ab,
+	      oStart: h.buffer1[0],
+	      oLength: h.buffer1[1],
+	      // length of o to remove
+	      abStart: h.buffer2[0],
+	      abLength: h.buffer2[1] // length of a/b to insert
+	      // abContent: (ab === 'a' ? a : b).slice(h.buffer2[0], h.buffer2[0] + h.buffer2[1])
 
-	      opt.highlight = highlight;
+	    });
+	  }
 
-	      return err
-	        ? callback(err)
-	        : callback(null, out);
-	    };
+	  diffIndices(o, a).forEach(function (item) {
+	    return addHunk(item, 'a');
+	  });
+	  diffIndices(o, b).forEach(function (item) {
+	    return addHunk(item, 'b');
+	  });
+	  hunks.sort(function (x, y) {
+	    return x.oStart - y.oStart;
+	  });
+	  var results = [];
+	  var currOffset = 0;
 
-	    if (!highlight || highlight.length < 3) {
-	      return done();
+	  function advanceTo(endOffset) {
+	    if (endOffset > currOffset) {
+	      results.push({
+	        stable: true,
+	        buffer: 'o',
+	        bufferStart: currOffset,
+	        bufferLength: endOffset - currOffset,
+	        bufferContent: o.slice(currOffset, endOffset)
+	      });
+	      currOffset = endOffset;
 	    }
+	  }
 
-	    delete opt.highlight;
+	  while (hunks.length) {
+	    var hunk = hunks.shift();
+	    var regionStart = hunk.oStart;
+	    var regionEnd = hunk.oStart + hunk.oLength;
+	    var regionHunks = [hunk];
+	    advanceTo(regionStart); // Try to pull next overlapping hunk into this region
+
+	    while (hunks.length) {
+	      var nextHunk = hunks[0];
+	      var nextHunkStart = nextHunk.oStart;
+	      if (nextHunkStart > regionEnd) break; // no overlap
 
-	    if (!pending) { return done(); }
+	      regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
+	      regionHunks.push(hunks.shift());
+	    }
 
-	    for (; i < tokens.length; i++) {
-	      (function(token) {
-	        if (token.type !== 'code') {
-	          return --pending || done();
-	        }
-	        return highlight(token.text, token.lang, function(err, code) {
-	          if (err) { return done(err); }
-	          if (code == null || code === token.text) {
-	            return --pending || done();
-	          }
-	          token.text = code;
-	          token.escaped = true;
-	          --pending || done();
+	    if (regionHunks.length === 1) {
+	      // Only one hunk touches this region, meaning that there is no conflict here.
+	      // Either `a` or `b` is inserting into a region of `o` unchanged by the other.
+	      if (hunk.abLength > 0) {
+	        var buffer = hunk.ab === 'a' ? a : b;
+	        results.push({
+	          stable: true,
+	          buffer: hunk.ab,
+	          bufferStart: hunk.abStart,
+	          bufferLength: hunk.abLength,
+	          bufferContent: buffer.slice(hunk.abStart, hunk.abStart + hunk.abLength)
 	        });
-	      })(tokens[i]);
+	      }
+	    } else {
+	      // A true a/b conflict. Determine the bounds involved from `a`, `o`, and `b`.
+	      // Effectively merge all the `a` hunks into one giant hunk, then do the
+	      // same for the `b` hunks; then, correct for skew in the regions of `o`
+	      // that each side changed, and report appropriate spans for the three sides.
+	      var bounds = {
+	        a: [a.length, -1, o.length, -1],
+	        b: [b.length, -1, o.length, -1]
+	      };
+
+	      while (regionHunks.length) {
+	        hunk = regionHunks.shift();
+	        var oStart = hunk.oStart;
+	        var oEnd = oStart + hunk.oLength;
+	        var abStart = hunk.abStart;
+	        var abEnd = abStart + hunk.abLength;
+	        var _b = bounds[hunk.ab];
+	        _b[0] = Math.min(abStart, _b[0]);
+	        _b[1] = Math.max(abEnd, _b[1]);
+	        _b[2] = Math.min(oStart, _b[2]);
+	        _b[3] = Math.max(oEnd, _b[3]);
+	      }
+
+	      var aStart = bounds.a[0] + (regionStart - bounds.a[2]);
+	      var aEnd = bounds.a[1] + (regionEnd - bounds.a[3]);
+	      var bStart = bounds.b[0] + (regionStart - bounds.b[2]);
+	      var bEnd = bounds.b[1] + (regionEnd - bounds.b[3]);
+	      var result = {
+	        stable: false,
+	        aStart: aStart,
+	        aLength: aEnd - aStart,
+	        aContent: a.slice(aStart, aEnd),
+	        oStart: regionStart,
+	        oLength: regionEnd - regionStart,
+	        oContent: o.slice(regionStart, regionEnd),
+	        bStart: bStart,
+	        bLength: bEnd - bStart,
+	        bContent: b.slice(bStart, bEnd)
+	      };
+	      results.push(result);
 	    }
 
-	    return;
+	    currOffset = regionEnd;
 	  }
-	  try {
-	    opt = merge$3({}, marked.defaults, opt || {});
-	    checkSanitizeDeprecation$1(opt);
-	    return Parser_1.parse(Lexer_1.lex(src, opt), opt);
-	  } catch (e$1) {
-	    e$1.message += '\nPlease report this to https://github.com/markedjs/marked.';
-	    if ((opt || marked.defaults).silent) {
-	      return '<p>An error occurred:</p><pre>'
-	        + escape$4(e$1.message + '', true)
-	        + '</pre>';
+
+	  advanceTo(o.length);
+	  return results;
+	} // Applies the output of diff3MergeRegions to actually
+	// construct the merged buffer; the returned result alternates
+	// between 'ok' and 'conflict' blocks.
+	// A "false conflict" is where `a` and `b` both change the same from `o`
+
+
+	function diff3Merge(a, o, b, options) {
+	  var defaults = {
+	    excludeFalseConflicts: true,
+	    stringSeparator: /\s+/
+	  };
+	  options = Object.assign(defaults, options);
+	  var aString = typeof a === 'string';
+	  var oString = typeof o === 'string';
+	  var bString = typeof b === 'string';
+	  if (aString) a = a.split(options.stringSeparator);
+	  if (oString) o = o.split(options.stringSeparator);
+	  if (bString) b = b.split(options.stringSeparator);
+	  var results = [];
+	  var regions = diff3MergeRegions(a, o, b);
+	  var okBuffer = [];
+
+	  function flushOk() {
+	    if (okBuffer.length) {
+	      results.push({
+	        ok: okBuffer
+	      });
 	    }
-	    throw e$1;
+
+	    okBuffer = [];
 	  }
-	}
 
-	/**
-	 * Options
-	 */
+	  function isFalseConflict(a, b) {
+	    if (a.length !== b.length) return false;
 
-	marked.options =
-	marked.setOptions = function(opt) {
-	  merge$3(marked.defaults, opt);
-	  changeDefaults(marked.defaults);
-	  return marked;
-	};
+	    for (var i = 0; i < a.length; i++) {
+	      if (a[i] !== b[i]) return false;
+	    }
 
-	marked.getDefaults = getDefaults;
+	    return true;
+	  }
+
+	  regions.forEach(function (region) {
+	    if (region.stable) {
+	      var _okBuffer;
 
-	marked.defaults = defaults$5;
+	      (_okBuffer = okBuffer).push.apply(_okBuffer, _toConsumableArray(region.bufferContent));
+	    } else {
+	      if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
+	        var _okBuffer2;
 
-	/**
-	 * Use Extension
-	 */
+	        (_okBuffer2 = okBuffer).push.apply(_okBuffer2, _toConsumableArray(region.aContent));
+	      } else {
+	        flushOk();
+	        results.push({
+	          conflict: {
+	            a: region.aContent,
+	            aIndex: region.aStart,
+	            o: region.oContent,
+	            oIndex: region.oStart,
+	            b: region.bContent,
+	            bIndex: region.bStart
+	          }
+	        });
+	      }
+	    }
+	  });
+	  flushOk();
+	  return results;
+	}
 
-	marked.use = function(extension) {
-	  var opts = merge$3({}, extension);
-	  if (extension.renderer) {
-	    var renderer = marked.defaults.renderer || new Renderer_1();
-	    var loop = function ( prop ) {
-	      var prevRenderer = renderer[prop];
-	      renderer[prop] = function () {
-	        var args = [], len = arguments.length;
-	        while ( len-- ) args[ len ] = arguments[ len ];
-
-	        var ret = extension.renderer[prop].apply(renderer, args);
-	        if (ret === false) {
-	          ret = prevRenderer.apply(renderer, args);
-	        }
-	        return ret;
-	      };
-	    };
+	var lodash = {exports: {}};
+
+	(function (module, exports) {
+	  (function () {
+	    /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+	    var undefined$1;
+	    /** Used as the semantic version number. */
+
+	    var VERSION = '4.17.21';
+	    /** Used as the size to enable large array optimizations. */
+
+	    var LARGE_ARRAY_SIZE = 200;
+	    /** Error message constants. */
+
+	    var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.',
+	        FUNC_ERROR_TEXT = 'Expected a function',
+	        INVALID_TEMPL_VAR_ERROR_TEXT = 'Invalid `variable` option passed into `_.template`';
+	    /** Used to stand-in for `undefined` hash values. */
+
+	    var HASH_UNDEFINED = '__lodash_hash_undefined__';
+	    /** Used as the maximum memoize cache size. */
+
+	    var MAX_MEMOIZE_SIZE = 500;
+	    /** Used as the internal argument placeholder. */
+
+	    var PLACEHOLDER = '__lodash_placeholder__';
+	    /** Used to compose bitmasks for cloning. */
+
+	    var CLONE_DEEP_FLAG = 1,
+	        CLONE_FLAT_FLAG = 2,
+	        CLONE_SYMBOLS_FLAG = 4;
+	    /** Used to compose bitmasks for value comparisons. */
+
+	    var COMPARE_PARTIAL_FLAG = 1,
+	        COMPARE_UNORDERED_FLAG = 2;
+	    /** Used to compose bitmasks for function metadata. */
+
+	    var WRAP_BIND_FLAG = 1,
+	        WRAP_BIND_KEY_FLAG = 2,
+	        WRAP_CURRY_BOUND_FLAG = 4,
+	        WRAP_CURRY_FLAG = 8,
+	        WRAP_CURRY_RIGHT_FLAG = 16,
+	        WRAP_PARTIAL_FLAG = 32,
+	        WRAP_PARTIAL_RIGHT_FLAG = 64,
+	        WRAP_ARY_FLAG = 128,
+	        WRAP_REARG_FLAG = 256,
+	        WRAP_FLIP_FLAG = 512;
+	    /** Used as default options for `_.truncate`. */
+
+	    var DEFAULT_TRUNC_LENGTH = 30,
+	        DEFAULT_TRUNC_OMISSION = '...';
+	    /** Used to detect hot functions by number of calls within a span of milliseconds. */
+
+	    var HOT_COUNT = 800,
+	        HOT_SPAN = 16;
+	    /** Used to indicate the type of lazy iteratees. */
+
+	    var LAZY_FILTER_FLAG = 1,
+	        LAZY_MAP_FLAG = 2,
+	        LAZY_WHILE_FLAG = 3;
+	    /** Used as references for various `Number` constants. */
+
+	    var INFINITY = 1 / 0,
+	        MAX_SAFE_INTEGER = 9007199254740991,
+	        MAX_INTEGER = 1.7976931348623157e+308,
+	        NAN = 0 / 0;
+	    /** Used as references for the maximum length and index of an array. */
+
+	    var MAX_ARRAY_LENGTH = 4294967295,
+	        MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
+	        HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;
+	    /** Used to associate wrap methods with their bit flags. */
+
+	    var wrapFlags = [['ary', WRAP_ARY_FLAG], ['bind', WRAP_BIND_FLAG], ['bindKey', WRAP_BIND_KEY_FLAG], ['curry', WRAP_CURRY_FLAG], ['curryRight', WRAP_CURRY_RIGHT_FLAG], ['flip', WRAP_FLIP_FLAG], ['partial', WRAP_PARTIAL_FLAG], ['partialRight', WRAP_PARTIAL_RIGHT_FLAG], ['rearg', WRAP_REARG_FLAG]];
+	    /** `Object#toString` result references. */
+
+	    var argsTag = '[object Arguments]',
+	        arrayTag = '[object Array]',
+	        asyncTag = '[object AsyncFunction]',
+	        boolTag = '[object Boolean]',
+	        dateTag = '[object Date]',
+	        domExcTag = '[object DOMException]',
+	        errorTag = '[object Error]',
+	        funcTag = '[object Function]',
+	        genTag = '[object GeneratorFunction]',
+	        mapTag = '[object Map]',
+	        numberTag = '[object Number]',
+	        nullTag = '[object Null]',
+	        objectTag = '[object Object]',
+	        promiseTag = '[object Promise]',
+	        proxyTag = '[object Proxy]',
+	        regexpTag = '[object RegExp]',
+	        setTag = '[object Set]',
+	        stringTag = '[object String]',
+	        symbolTag = '[object Symbol]',
+	        undefinedTag = '[object Undefined]',
+	        weakMapTag = '[object WeakMap]',
+	        weakSetTag = '[object WeakSet]';
+	    var arrayBufferTag = '[object ArrayBuffer]',
+	        dataViewTag = '[object DataView]',
+	        float32Tag = '[object Float32Array]',
+	        float64Tag = '[object Float64Array]',
+	        int8Tag = '[object Int8Array]',
+	        int16Tag = '[object Int16Array]',
+	        int32Tag = '[object Int32Array]',
+	        uint8Tag = '[object Uint8Array]',
+	        uint8ClampedTag = '[object Uint8ClampedArray]',
+	        uint16Tag = '[object Uint16Array]',
+	        uint32Tag = '[object Uint32Array]';
+	    /** Used to match empty string literals in compiled template source. */
+
+	    var reEmptyStringLeading = /\b__p \+= '';/g,
+	        reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
+	        reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
+	    /** Used to match HTML entities and HTML characters. */
+
+	    var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
+	        reUnescapedHtml = /[&<>"']/g,
+	        reHasEscapedHtml = RegExp(reEscapedHtml.source),
+	        reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
+	    /** Used to match template delimiters. */
+
+	    var reEscape = /<%-([\s\S]+?)%>/g,
+	        reEvaluate = /<%([\s\S]+?)%>/g,
+	        reInterpolate = /<%=([\s\S]+?)%>/g;
+	    /** Used to match property names within property paths. */
+
+	    var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+	        reIsPlainProp = /^\w*$/,
+	        rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;
+	    /**
+	     * Used to match `RegExp`
+	     * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
+	     */
 
-	    for (var prop in extension.renderer) loop( prop );
-	    opts.renderer = renderer;
-	  }
-	  if (extension.tokenizer) {
-	    var tokenizer = marked.defaults.tokenizer || new Tokenizer_1();
-	    var loop$1 = function ( prop ) {
-	      var prevTokenizer = tokenizer[prop$1];
-	      tokenizer[prop$1] = function () {
-	        var args = [], len = arguments.length;
-	        while ( len-- ) args[ len ] = arguments[ len ];
-
-	        var ret = extension.tokenizer[prop$1].apply(tokenizer, args);
-	        if (ret === false) {
-	          ret = prevTokenizer.apply(tokenizer, args);
-	        }
-	        return ret;
-	      };
-	    };
+	    var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
+	        reHasRegExpChar = RegExp(reRegExpChar.source);
+	    /** Used to match leading whitespace. */
 
-	    for (var prop$1 in extension.tokenizer) loop$1( prop );
-	    opts.tokenizer = tokenizer;
-	  }
-	  marked.setOptions(opts);
-	};
+	    var reTrimStart = /^\s+/;
+	    /** Used to match a single whitespace character. */
 
-	/**
-	 * Expose
-	 */
+	    var reWhitespace = /\s/;
+	    /** Used to match wrap detail comments. */
 
-	marked.Parser = Parser_1;
-	marked.parser = Parser_1.parse;
+	    var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/,
+	        reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
+	        reSplitDetails = /,? & /;
+	    /** Used to match words composed of alphanumeric characters. */
 
-	marked.Renderer = Renderer_1;
-	marked.TextRenderer = TextRenderer_1;
+	    var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g;
+	    /**
+	     * Used to validate the `validate` option in `_.template` variable.
+	     *
+	     * Forbids characters which could potentially change the meaning of the function argument definition:
+	     * - "()," (modification of function parameters)
+	     * - "=" (default value)
+	     * - "[]{}" (destructuring of function parameters)
+	     * - "/" (beginning of a comment)
+	     * - whitespace
+	     */
 
-	marked.Lexer = Lexer_1;
-	marked.lexer = Lexer_1.lex;
+	    var reForbiddenIdentifierChars = /[()=,{}\[\]\/\s]/;
+	    /** Used to match backslashes in property paths. */
 
-	marked.Tokenizer = Tokenizer_1;
+	    var reEscapeChar = /\\(\\)?/g;
+	    /**
+	     * Used to match
+	     * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
+	     */
 
-	marked.Slugger = Slugger_1;
+	    var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
+	    /** Used to match `RegExp` flags from their coerced string values. */
+
+	    var reFlags = /\w*$/;
+	    /** Used to detect bad signed hexadecimal string values. */
+
+	    var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+	    /** Used to detect binary string values. */
+
+	    var reIsBinary = /^0b[01]+$/i;
+	    /** Used to detect host constructors (Safari). */
+
+	    var reIsHostCtor = /^\[object .+?Constructor\]$/;
+	    /** Used to detect octal string values. */
+
+	    var reIsOctal = /^0o[0-7]+$/i;
+	    /** Used to detect unsigned integer values. */
+
+	    var reIsUint = /^(?:0|[1-9]\d*)$/;
+	    /** Used to match Latin Unicode letters (excluding mathematical operators). */
+
+	    var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;
+	    /** Used to ensure capturing order of template delimiters. */
+
+	    var reNoMatch = /($^)/;
+	    /** Used to match unescaped characters in compiled string literals. */
+
+	    var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
+	    /** Used to compose unicode character classes. */
+
+	    var rsAstralRange = "\\ud800-\\udfff",
+	        rsComboMarksRange = "\\u0300-\\u036f",
+	        reComboHalfMarksRange = "\\ufe20-\\ufe2f",
+	        rsComboSymbolsRange = "\\u20d0-\\u20ff",
+	        rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
+	        rsDingbatRange = "\\u2700-\\u27bf",
+	        rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
+	        rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
+	        rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
+	        rsPunctuationRange = "\\u2000-\\u206f",
+	        rsSpaceRange = " \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000",
+	        rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
+	        rsVarRange = "\\ufe0e\\ufe0f",
+	        rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;
+	    /** Used to compose unicode capture groups. */
+
+	    var rsApos = "['\u2019]",
+	        rsAstral = '[' + rsAstralRange + ']',
+	        rsBreak = '[' + rsBreakRange + ']',
+	        rsCombo = '[' + rsComboRange + ']',
+	        rsDigits = '\\d+',
+	        rsDingbat = '[' + rsDingbatRange + ']',
+	        rsLower = '[' + rsLowerRange + ']',
+	        rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
+	        rsFitz = "\\ud83c[\\udffb-\\udfff]",
+	        rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
+	        rsNonAstral = '[^' + rsAstralRange + ']',
+	        rsRegional = "(?:\\ud83c[\\udde6-\\uddff]){2}",
+	        rsSurrPair = "[\\ud800-\\udbff][\\udc00-\\udfff]",
+	        rsUpper = '[' + rsUpperRange + ']',
+	        rsZWJ = "\\u200d";
+	    /** Used to compose unicode regexes. */
+
+	    var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',
+	        rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',
+	        rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
+	        rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
+	        reOptMod = rsModifier + '?',
+	        rsOptVar = '[' + rsVarRange + ']?',
+	        rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
+	        rsOrdLower = '\\d*(?:1st|2nd|3rd|(?![123])\\dth)(?=\\b|[A-Z_])',
+	        rsOrdUpper = '\\d*(?:1ST|2ND|3RD|(?![123])\\dTH)(?=\\b|[a-z_])',
+	        rsSeq = rsOptVar + reOptMod + rsOptJoin,
+	        rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
+	        rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
+	    /** Used to match apostrophes. */
+
+	    var reApos = RegExp(rsApos, 'g');
+	    /**
+	     * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
+	     * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
+	     */
 
-	marked.parse = marked;
+	    var reComboMark = RegExp(rsCombo, 'g');
+	    /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
+
+	    var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
+	    /** Used to match complex or compound words. */
+
+	    var reUnicodeWord = RegExp([rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')', rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')', rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower, rsUpper + '+' + rsOptContrUpper, rsOrdUpper, rsOrdLower, rsDigits, rsEmoji].join('|'), 'g');
+	    /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
+
+	    var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');
+	    /** Used to detect strings that need a more robust regexp to match words. */
+
+	    var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
+	    /** Used to assign default `context` object properties. */
+
+	    var contextProps = ['Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array', 'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object', 'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array', 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap', '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'];
+	    /** Used to make template sourceURLs easier to identify. */
+
+	    var templateCounter = -1;
+	    /** Used to identify `toStringTag` values of typed arrays. */
+
+	    var typedArrayTags = {};
+	    typedArrayTags[float32Tag] = typedArrayTags[float64Tag] = typedArrayTags[int8Tag] = typedArrayTags[int16Tag] = typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] = typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] = typedArrayTags[uint32Tag] = true;
+	    typedArrayTags[argsTag] = typedArrayTags[arrayTag] = typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] = typedArrayTags[dataViewTag] = typedArrayTags[dateTag] = typedArrayTags[errorTag] = typedArrayTags[funcTag] = typedArrayTags[mapTag] = typedArrayTags[numberTag] = typedArrayTags[objectTag] = typedArrayTags[regexpTag] = typedArrayTags[setTag] = typedArrayTags[stringTag] = typedArrayTags[weakMapTag] = false;
+	    /** Used to identify `toStringTag` values supported by `_.clone`. */
+
+	    var cloneableTags = {};
+	    cloneableTags[argsTag] = cloneableTags[arrayTag] = cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] = cloneableTags[boolTag] = cloneableTags[dateTag] = cloneableTags[float32Tag] = cloneableTags[float64Tag] = cloneableTags[int8Tag] = cloneableTags[int16Tag] = cloneableTags[int32Tag] = cloneableTags[mapTag] = cloneableTags[numberTag] = cloneableTags[objectTag] = cloneableTags[regexpTag] = cloneableTags[setTag] = cloneableTags[stringTag] = cloneableTags[symbolTag] = cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] = cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
+	    cloneableTags[errorTag] = cloneableTags[funcTag] = cloneableTags[weakMapTag] = false;
+	    /** Used to map Latin Unicode letters to basic Latin letters. */
+
+	    var deburredLetters = {
+	      // Latin-1 Supplement block.
+	      '\xc0': 'A',
+	      '\xc1': 'A',
+	      '\xc2': 'A',
+	      '\xc3': 'A',
+	      '\xc4': 'A',
+	      '\xc5': 'A',
+	      '\xe0': 'a',
+	      '\xe1': 'a',
+	      '\xe2': 'a',
+	      '\xe3': 'a',
+	      '\xe4': 'a',
+	      '\xe5': 'a',
+	      '\xc7': 'C',
+	      '\xe7': 'c',
+	      '\xd0': 'D',
+	      '\xf0': 'd',
+	      '\xc8': 'E',
+	      '\xc9': 'E',
+	      '\xca': 'E',
+	      '\xcb': 'E',
+	      '\xe8': 'e',
+	      '\xe9': 'e',
+	      '\xea': 'e',
+	      '\xeb': 'e',
+	      '\xcc': 'I',
+	      '\xcd': 'I',
+	      '\xce': 'I',
+	      '\xcf': 'I',
+	      '\xec': 'i',
+	      '\xed': 'i',
+	      '\xee': 'i',
+	      '\xef': 'i',
+	      '\xd1': 'N',
+	      '\xf1': 'n',
+	      '\xd2': 'O',
+	      '\xd3': 'O',
+	      '\xd4': 'O',
+	      '\xd5': 'O',
+	      '\xd6': 'O',
+	      '\xd8': 'O',
+	      '\xf2': 'o',
+	      '\xf3': 'o',
+	      '\xf4': 'o',
+	      '\xf5': 'o',
+	      '\xf6': 'o',
+	      '\xf8': 'o',
+	      '\xd9': 'U',
+	      '\xda': 'U',
+	      '\xdb': 'U',
+	      '\xdc': 'U',
+	      '\xf9': 'u',
+	      '\xfa': 'u',
+	      '\xfb': 'u',
+	      '\xfc': 'u',
+	      '\xdd': 'Y',
+	      '\xfd': 'y',
+	      '\xff': 'y',
+	      '\xc6': 'Ae',
+	      '\xe6': 'ae',
+	      '\xde': 'Th',
+	      '\xfe': 'th',
+	      '\xdf': 'ss',
+	      // Latin Extended-A block.
+	      "\u0100": 'A',
+	      "\u0102": 'A',
+	      "\u0104": 'A',
+	      "\u0101": 'a',
+	      "\u0103": 'a',
+	      "\u0105": 'a',
+	      "\u0106": 'C',
+	      "\u0108": 'C',
+	      "\u010A": 'C',
+	      "\u010C": 'C',
+	      "\u0107": 'c',
+	      "\u0109": 'c',
+	      "\u010B": 'c',
+	      "\u010D": 'c',
+	      "\u010E": 'D',
+	      "\u0110": 'D',
+	      "\u010F": 'd',
+	      "\u0111": 'd',
+	      "\u0112": 'E',
+	      "\u0114": 'E',
+	      "\u0116": 'E',
+	      "\u0118": 'E',
+	      "\u011A": 'E',
+	      "\u0113": 'e',
+	      "\u0115": 'e',
+	      "\u0117": 'e',
+	      "\u0119": 'e',
+	      "\u011B": 'e',
+	      "\u011C": 'G',
+	      "\u011E": 'G',
+	      "\u0120": 'G',
+	      "\u0122": 'G',
+	      "\u011D": 'g',
+	      "\u011F": 'g',
+	      "\u0121": 'g',
+	      "\u0123": 'g',
+	      "\u0124": 'H',
+	      "\u0126": 'H',
+	      "\u0125": 'h',
+	      "\u0127": 'h',
+	      "\u0128": 'I',
+	      "\u012A": 'I',
+	      "\u012C": 'I',
+	      "\u012E": 'I',
+	      "\u0130": 'I',
+	      "\u0129": 'i',
+	      "\u012B": 'i',
+	      "\u012D": 'i',
+	      "\u012F": 'i',
+	      "\u0131": 'i',
+	      "\u0134": 'J',
+	      "\u0135": 'j',
+	      "\u0136": 'K',
+	      "\u0137": 'k',
+	      "\u0138": 'k',
+	      "\u0139": 'L',
+	      "\u013B": 'L',
+	      "\u013D": 'L',
+	      "\u013F": 'L',
+	      "\u0141": 'L',
+	      "\u013A": 'l',
+	      "\u013C": 'l',
+	      "\u013E": 'l',
+	      "\u0140": 'l',
+	      "\u0142": 'l',
+	      "\u0143": 'N',
+	      "\u0145": 'N',
+	      "\u0147": 'N',
+	      "\u014A": 'N',
+	      "\u0144": 'n',
+	      "\u0146": 'n',
+	      "\u0148": 'n',
+	      "\u014B": 'n',
+	      "\u014C": 'O',
+	      "\u014E": 'O',
+	      "\u0150": 'O',
+	      "\u014D": 'o',
+	      "\u014F": 'o',
+	      "\u0151": 'o',
+	      "\u0154": 'R',
+	      "\u0156": 'R',
+	      "\u0158": 'R',
+	      "\u0155": 'r',
+	      "\u0157": 'r',
+	      "\u0159": 'r',
+	      "\u015A": 'S',
+	      "\u015C": 'S',
+	      "\u015E": 'S',
+	      "\u0160": 'S',
+	      "\u015B": 's',
+	      "\u015D": 's',
+	      "\u015F": 's',
+	      "\u0161": 's',
+	      "\u0162": 'T',
+	      "\u0164": 'T',
+	      "\u0166": 'T',
+	      "\u0163": 't',
+	      "\u0165": 't',
+	      "\u0167": 't',
+	      "\u0168": 'U',
+	      "\u016A": 'U',
+	      "\u016C": 'U',
+	      "\u016E": 'U',
+	      "\u0170": 'U',
+	      "\u0172": 'U',
+	      "\u0169": 'u',
+	      "\u016B": 'u',
+	      "\u016D": 'u',
+	      "\u016F": 'u',
+	      "\u0171": 'u',
+	      "\u0173": 'u',
+	      "\u0174": 'W',
+	      "\u0175": 'w',
+	      "\u0176": 'Y',
+	      "\u0177": 'y',
+	      "\u0178": 'Y',
+	      "\u0179": 'Z',
+	      "\u017B": 'Z',
+	      "\u017D": 'Z',
+	      "\u017A": 'z',
+	      "\u017C": 'z',
+	      "\u017E": 'z',
+	      "\u0132": 'IJ',
+	      "\u0133": 'ij',
+	      "\u0152": 'Oe',
+	      "\u0153": 'oe',
+	      "\u0149": "'n",
+	      "\u017F": 's'
+	    };
+	    /** Used to map characters to HTML entities. */
+
+	    var htmlEscapes = {
+	      '&': '&amp;',
+	      '<': '&lt;',
+	      '>': '&gt;',
+	      '"': '&quot;',
+	      "'": '&#39;'
+	    };
+	    /** Used to map HTML entities to characters. */
+
+	    var htmlUnescapes = {
+	      '&amp;': '&',
+	      '&lt;': '<',
+	      '&gt;': '>',
+	      '&quot;': '"',
+	      '&#39;': "'"
+	    };
+	    /** Used to escape characters for inclusion in compiled string literals. */
+
+	    var stringEscapes = {
+	      '\\': '\\',
+	      "'": "'",
+	      '\n': 'n',
+	      '\r': 'r',
+	      "\u2028": 'u2028',
+	      "\u2029": 'u2029'
+	    };
+	    /** Built-in method references without a dependency on `root`. */
+
+	    var freeParseFloat = parseFloat,
+	        freeParseInt = parseInt;
+	    /** Detect free variable `global` from Node.js. */
+
+	    var freeGlobal = _typeof(commonjsGlobal) == 'object' && commonjsGlobal && commonjsGlobal.Object === Object && commonjsGlobal;
+	    /** Detect free variable `self`. */
+
+	    var freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
+	    /** Used as a reference to the global object. */
+
+	    var root = freeGlobal || freeSelf || Function('return this')();
+	    /** Detect free variable `exports`. */
+
+	    var freeExports = exports && !exports.nodeType && exports;
+	    /** Detect free variable `module`. */
+
+	    var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;
+	    /** Detect the popular CommonJS extension `module.exports`. */
+
+	    var moduleExports = freeModule && freeModule.exports === freeExports;
+	    /** Detect free variable `process` from Node.js. */
+
+	    var freeProcess = moduleExports && freeGlobal.process;
+	    /** Used to access faster Node.js helpers. */
+
+	    var nodeUtil = function () {
+	      try {
+	        // Use `util.types` for Node.js 10+.
+	        var types = freeModule && freeModule.require && freeModule.require('util').types;
 
-	var marked_1 = marked;
+	        if (types) {
+	          return types;
+	        } // Legacy `process.binding('util')` for Node.js < 10.
 
-	var tiler$2 = utilTiler();
-	var dispatch$3 = dispatch('loaded');
-	var _tileZoom$2 = 14;
-	var _osmoseUrlRoot = 'https://osmose.openstreetmap.fr/api/0.3';
-	var _osmoseData = { icons: {}, items: [] };
 
-	// This gets reassigned if reset
-	var _cache$2;
+	        return freeProcess && freeProcess.binding && freeProcess.binding('util');
+	      } catch (e) {}
+	    }();
+	    /* Node.js helper references. */
 
-	function abortRequest$2(controller) {
-	  if (controller) {
-	    controller.abort();
-	  }
-	}
 
-	function abortUnwantedRequests$2(cache, tiles) {
-	  Object.keys(cache.inflightTile).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) { return k === tile.id; });
-	    if (!wanted) {
-	      abortRequest$2(cache.inflightTile[k]);
-	      delete cache.inflightTile[k];
-	    }
-	  });
-	}
+	    var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,
+	        nodeIsDate = nodeUtil && nodeUtil.isDate,
+	        nodeIsMap = nodeUtil && nodeUtil.isMap,
+	        nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,
+	        nodeIsSet = nodeUtil && nodeUtil.isSet,
+	        nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+	    /*--------------------------------------------------------------------------*/
 
-	function encodeIssueRtree$2(d) {
-	  return { minX: d.loc[0], minY: d.loc[1], maxX: d.loc[0], maxY: d.loc[1], data: d };
-	}
+	    /**
+	     * A faster alternative to `Function#apply`, this function invokes `func`
+	     * with the `this` binding of `thisArg` and the arguments of `args`.
+	     *
+	     * @private
+	     * @param {Function} func The function to invoke.
+	     * @param {*} thisArg The `this` binding of `func`.
+	     * @param {Array} args The arguments to invoke `func` with.
+	     * @returns {*} Returns the result of `func`.
+	     */
 
-	// Replace or remove QAItem from rtree
-	function updateRtree$2(item, replace) {
-	  _cache$2.rtree.remove(item, function (a, b) { return a.data.id === b.data.id; });
+	    function apply(func, thisArg, args) {
+	      switch (args.length) {
+	        case 0:
+	          return func.call(thisArg);
 
-	  if (replace) {
-	    _cache$2.rtree.insert(item);
-	  }
-	}
+	        case 1:
+	          return func.call(thisArg, args[0]);
 
-	// Issues shouldn't obscure eachother
-	function preventCoincident$1(loc) {
-	  var coincident = false;
-	  do {
-	    // first time, move marker up. after that, move marker right.
-	    var delta = coincident ? [0.00001, 0] : [0, 0.00001];
-	    loc = geoVecAdd(loc, delta);
-	    var bbox = geoExtent(loc).bbox();
-	    coincident = _cache$2.rtree.search(bbox).length;
-	  } while (coincident);
+	        case 2:
+	          return func.call(thisArg, args[0], args[1]);
 
-	  return loc;
-	}
+	        case 3:
+	          return func.call(thisArg, args[0], args[1], args[2]);
+	      }
 
-	var serviceOsmose = {
-	  title: 'osmose',
+	      return func.apply(thisArg, args);
+	    }
+	    /**
+	     * A specialized version of `baseAggregator` for arrays.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} setter The function to set `accumulator` values.
+	     * @param {Function} iteratee The iteratee to transform keys.
+	     * @param {Object} accumulator The initial aggregated object.
+	     * @returns {Function} Returns `accumulator`.
+	     */
 
-	  init: function init() {
-	    _mainFileFetcher.get('qa_data')
-	      .then(function (d) {
-	        _osmoseData = d.osmose;
-	        _osmoseData.items = Object.keys(d.osmose.icons)
-	          .map(function (s) { return s.split('-')[0]; })
-	          .reduce(function (unique, item) { return unique.indexOf(item) !== -1 ? unique : unique.concat( [item]); }, []);
-	      });
 
-	    if (!_cache$2) {
-	      this.reset();
-	    }
+	    function arrayAggregator(array, setter, iteratee, accumulator) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length;
 
-	    this.event = utilRebind(this, dispatch$3, 'on');
-	  },
+	      while (++index < length) {
+	        var value = array[index];
+	        setter(accumulator, value, iteratee(value), array);
+	      }
 
-	  reset: function reset() {
-	    var _strings = {};
-	    var _colors = {};
-	    if (_cache$2) {
-	      Object.values(_cache$2.inflightTile).forEach(abortRequest$2);
-	      // Strings and colors are static and should not be re-populated
-	      _strings = _cache$2.strings;
-	      _colors = _cache$2.colors;
+	      return accumulator;
 	    }
-	    _cache$2 = {
-	      data: {},
-	      loadedTile: {},
-	      inflightTile: {},
-	      inflightPost: {},
-	      closed: {},
-	      rtree: new RBush(),
-	      strings: _strings,
-	      colors: _colors
-	    };
-	  },
+	    /**
+	     * A specialized version of `_.forEach` for arrays without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @returns {Array} Returns `array`.
+	     */
 
-	  loadIssues: function loadIssues(projection) {
-	    var this$1 = this;
 
-	    var params = {
-	      // Tiles return a maximum # of issues
-	      // So we want to filter our request for only types iD supports
-	      item: _osmoseData.items
-	    };
+	    function arrayEach(array, iteratee) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length;
 
-	    // determine the needed tiles to cover the view
-	    var tiles = tiler$2
-	      .zoomExtent([_tileZoom$2, _tileZoom$2])
-	      .getTiles(projection);
+	      while (++index < length) {
+	        if (iteratee(array[index], index, array) === false) {
+	          break;
+	        }
+	      }
 
-	    // abort inflight requests that are no longer needed
-	    abortUnwantedRequests$2(_cache$2, tiles);
+	      return array;
+	    }
+	    /**
+	     * A specialized version of `_.forEachRight` for arrays without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @returns {Array} Returns `array`.
+	     */
 
-	    // issue new requests..
-	    tiles.forEach(function (tile) {
-	      if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) { return; }
 
-	      var ref = tile.xyz;
-	      var x = ref[0];
-	      var y = ref[1];
-	      var z = ref[2];
-	      var url = _osmoseUrlRoot + "/issues/" + z + "/" + x + "/" + y + ".json?" + utilQsString(params);
+	    function arrayEachRight(array, iteratee) {
+	      var length = array == null ? 0 : array.length;
 
-	      var controller = new AbortController();
-	      _cache$2.inflightTile[tile.id] = controller;
+	      while (length--) {
+	        if (iteratee(array[length], length, array) === false) {
+	          break;
+	        }
+	      }
 
-	      d3_json(url, { signal: controller.signal })
-	        .then(function (data) {
-	          delete _cache$2.inflightTile[tile.id];
-	          _cache$2.loadedTile[tile.id] = true;
-
-	          if (data.features) {
-	            data.features.forEach(function (issue) {
-	              var ref = issue.properties;
-	              var item = ref.item;
-	              var cl = ref.class;
-	              var id = ref.uuid;
-	              /* Osmose issues are uniquely identified by a unique
-	                `item` and `class` combination (both integer values) */
-	              var itemType = item + "-" + cl;
-
-	              // Filter out unsupported issue types (some are too specific or advanced)
-	              if (itemType in _osmoseData.icons) {
-	                var loc = issue.geometry.coordinates; // lon, lat
-	                loc = preventCoincident$1(loc);
-
-	                var d = new QAItem(loc, this$1, itemType, id, { item: item });
-
-	                // Setting elems here prevents UI detail requests
-	                if (item === 8300 || item === 8360) {
-	                  d.elems = [];
-	                }
+	      return array;
+	    }
+	    /**
+	     * A specialized version of `_.every` for arrays without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} predicate The function invoked per iteration.
+	     * @returns {boolean} Returns `true` if all elements pass the predicate check,
+	     *  else `false`.
+	     */
 
-	                _cache$2.data[d.id] = d;
-	                _cache$2.rtree.insert(encodeIssueRtree$2(d));
-	              }
-	            });
-	          }
 
-	          dispatch$3.call('loaded');
-	        })
-	        .catch(function () {
-	          delete _cache$2.inflightTile[tile.id];
-	          _cache$2.loadedTile[tile.id] = true;
-	        });
-	    });
-	  },
+	    function arrayEvery(array, predicate) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length;
 
-	  loadIssueDetail: function loadIssueDetail(issue) {
-	    var this$1 = this;
+	      while (++index < length) {
+	        if (!predicate(array[index], index, array)) {
+	          return false;
+	        }
+	      }
 
-	    // Issue details only need to be fetched once
-	    if (issue.elems !== undefined) {
-	      return Promise.resolve(issue);
+	      return true;
 	    }
+	    /**
+	     * A specialized version of `_.filter` for arrays without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} predicate The function invoked per iteration.
+	     * @returns {Array} Returns the new filtered array.
+	     */
 
-	    var url = _osmoseUrlRoot + "/issue/" + (issue.id) + "?langs=" + (_mainLocalizer.localeCode());
-	    var cacheDetails = function (data) {
-	      // Associated elements used for highlighting
-	      // Assign directly for immediate use in the callback
-	      issue.elems = data.elems.map(function (e) { return e.type.substring(0,1) + e.id; });
-
-	      // Some issues have instance specific detail in a subtitle
-	      issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';
-
-	      this$1.replaceItem(issue);
-	    };
 
-	    return d3_json(url).then(cacheDetails).then(function () { return issue; });
-	  },
+	    function arrayFilter(array, predicate) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length,
+	          resIndex = 0,
+	          result = [];
 
-	  loadStrings: function loadStrings(locale) {
-	    if ( locale === void 0 ) locale=_mainLocalizer.localeCode();
+	      while (++index < length) {
+	        var value = array[index];
 
-	    var items = Object.keys(_osmoseData.icons);
+	        if (predicate(value, index, array)) {
+	          result[resIndex++] = value;
+	        }
+	      }
 
-	    if (
-	      locale in _cache$2.strings
-	      && Object.keys(_cache$2.strings[locale]).length === items.length
-	    ) {
-	        return Promise.resolve(_cache$2.strings[locale]);
+	      return result;
 	    }
+	    /**
+	     * A specialized version of `_.includes` for arrays without support for
+	     * specifying an index to search from.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to inspect.
+	     * @param {*} target The value to search for.
+	     * @returns {boolean} Returns `true` if `target` is found, else `false`.
+	     */
 
-	    // May be partially populated already if some requests were successful
-	    if (!(locale in _cache$2.strings)) {
-	      _cache$2.strings[locale] = {};
+
+	    function arrayIncludes(array, value) {
+	      var length = array == null ? 0 : array.length;
+	      return !!length && baseIndexOf(array, value, 0) > -1;
 	    }
+	    /**
+	     * This function is like `arrayIncludes` except that it accepts a comparator.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to inspect.
+	     * @param {*} target The value to search for.
+	     * @param {Function} comparator The comparator invoked per element.
+	     * @returns {boolean} Returns `true` if `target` is found, else `false`.
+	     */
 
-	    // Only need to cache strings for supported issue types
-	    // Using multiple individual item + class requests to reduce fetched data size
-	    var allRequests = items.map(function (itemType) {
-	      // No need to request data we already have
-	      if (itemType in _cache$2.strings[locale]) { return; }
 
-	      var cacheData = function (data) {
-	        // Bunch of nested single value arrays of objects
-	        var ref = data.categories;
-	        var cat = ref[0]; if ( cat === void 0 ) cat = {items:[]};
-	        var ref$1 = cat.items;
-	        var item = ref$1[0]; if ( item === void 0 ) item = {class:[]};
-	        var ref$2 = item.class;
-	        var cl = ref$2[0]; if ( cl === void 0 ) cl = null;
-
-	        // If null default value is reached, data wasn't as expected (or was empty)
-	        if (!cl) {
-	          /* eslint-disable no-console */
-	          console.log(("Osmose strings request (" + itemType + ") had unexpected data"));
-	          /* eslint-enable no-console */
-	          return;
-	        }
+	    function arrayIncludesWith(array, value, comparator) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length;
 
-	        // Cache served item colors to automatically style issue markers later
-	        var itemInt = item.item;
-	        var color = item.color;
-	        if (/^#[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/.test(color)) {
-	          _cache$2.colors[itemInt] = color;
+	      while (++index < length) {
+	        if (comparator(value, array[index])) {
+	          return true;
 	        }
+	      }
 
-	        // Value of root key will be null if no string exists
-	        // If string exists, value is an object with key 'auto' for string
-	        var title = cl.title;
-	        var detail = cl.detail;
-	        var fix = cl.fix;
-	        var trap = cl.trap;
-
-	        // Osmose titles shouldn't contain markdown
-	        var issueStrings = {};
-	        if (title) { issueStrings.title = title.auto; }
-	        if (detail) { issueStrings.detail = marked_1(detail.auto); }
-	        if (trap) { issueStrings.trap = marked_1(trap.auto); }
-	        if (fix) { issueStrings.fix = marked_1(fix.auto); }
-
-	        _cache$2.strings[locale][itemType] = issueStrings;
-	      };
-
-	      var ref = itemType.split('-');
-	      var item = ref[0];
-	      var cl = ref[1];
+	      return false;
+	    }
+	    /**
+	     * A specialized version of `_.map` for arrays without support for iteratee
+	     * shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @returns {Array} Returns the new mapped array.
+	     */
 
-	      // Osmose API falls back to English strings where untranslated or if locale doesn't exist
-	      var url = _osmoseUrlRoot + "/items/" + item + "/class/" + cl + "?langs=" + locale;
 
-	      return d3_json(url).then(cacheData);
-	    });
+	    function arrayMap(array, iteratee) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length,
+	          result = Array(length);
 
-	    return Promise.all(allRequests).then(function () { return _cache$2.strings[locale]; });
-	  },
+	      while (++index < length) {
+	        result[index] = iteratee(array[index], index, array);
+	      }
 
-	  getStrings: function getStrings(itemType, locale) {
-	    if ( locale === void 0 ) locale=_mainLocalizer.localeCode();
+	      return result;
+	    }
+	    /**
+	     * Appends the elements of `values` to `array`.
+	     *
+	     * @private
+	     * @param {Array} array The array to modify.
+	     * @param {Array} values The values to append.
+	     * @returns {Array} Returns `array`.
+	     */
 
-	    // No need to fallback to English, Osmose API handles this for us
-	    return (locale in _cache$2.strings) ? _cache$2.strings[locale][itemType] : {};
-	  },
 
-	  getColor: function getColor(itemType) {
-	    return (itemType in _cache$2.colors) ? _cache$2.colors[itemType] : '#FFFFFF';
-	  },
+	    function arrayPush(array, values) {
+	      var index = -1,
+	          length = values.length,
+	          offset = array.length;
 
-	  postUpdate: function postUpdate(issue, callback) {
-	    var this$1 = this;
+	      while (++index < length) {
+	        array[offset + index] = values[index];
+	      }
 
-	    if (_cache$2.inflightPost[issue.id]) {
-	      return callback({ message: 'Issue update already inflight', status: -2 }, issue);
+	      return array;
 	    }
+	    /**
+	     * A specialized version of `_.reduce` for arrays without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @param {*} [accumulator] The initial value.
+	     * @param {boolean} [initAccum] Specify using the first element of `array` as
+	     *  the initial value.
+	     * @returns {*} Returns the accumulated value.
+	     */
 
-	    // UI sets the status to either 'done' or 'false'
-	    var url = _osmoseUrlRoot + "/issue/" + (issue.id) + "/" + (issue.newStatus);
-	    var controller = new AbortController();
-	    var after = function () {
-	      delete _cache$2.inflightPost[issue.id];
 
-	      this$1.removeItem(issue);
-	      if (issue.newStatus === 'done') {
-	        // Keep track of the number of issues closed per `item` to tag the changeset
-	        if (!(issue.item in _cache$2.closed)) {
-	          _cache$2.closed[issue.item] = 0;
-	        }
-	        _cache$2.closed[issue.item] += 1;
+	    function arrayReduce(array, iteratee, accumulator, initAccum) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length;
+
+	      if (initAccum && length) {
+	        accumulator = array[++index];
 	      }
-	      if (callback) { callback(null, issue); }
-	    };
 
-	    _cache$2.inflightPost[issue.id] = controller;
+	      while (++index < length) {
+	        accumulator = iteratee(accumulator, array[index], index, array);
+	      }
 
-	    fetch(url, { signal: controller.signal })
-	      .then(after)
-	      .catch(function (err) {
-	        delete _cache$2.inflightPost[issue.id];
-	        if (callback) { callback(err.message); }
-	      });
-	  },
+	      return accumulator;
+	    }
+	    /**
+	     * A specialized version of `_.reduceRight` for arrays without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @param {*} [accumulator] The initial value.
+	     * @param {boolean} [initAccum] Specify using the last element of `array` as
+	     *  the initial value.
+	     * @returns {*} Returns the accumulated value.
+	     */
 
-	  // Get all cached QAItems covering the viewport
-	  getItems: function getItems(projection) {
-	    var viewport = projection.clipExtent();
-	    var min = [viewport[0][0], viewport[1][1]];
-	    var max = [viewport[1][0], viewport[0][1]];
-	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
 
-	    return _cache$2.rtree.search(bbox).map(function (d) { return d.data; });
-	  },
+	    function arrayReduceRight(array, iteratee, accumulator, initAccum) {
+	      var length = array == null ? 0 : array.length;
 
-	  // Get a QAItem from cache
-	  // NOTE: Don't change method name until UI v3 is merged
-	  getError: function getError(id) {
-	    return _cache$2.data[id];
-	  },
+	      if (initAccum && length) {
+	        accumulator = array[--length];
+	      }
 
-	  // get the name of the icon to display for this item
-	  getIcon: function getIcon(itemType) {
-	    return _osmoseData.icons[itemType];
-	  },
+	      while (length--) {
+	        accumulator = iteratee(accumulator, array[length], length, array);
+	      }
 
-	  // Replace a single QAItem in the cache
-	  replaceItem: function replaceItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) { return; }
+	      return accumulator;
+	    }
+	    /**
+	     * A specialized version of `_.some` for arrays without support for iteratee
+	     * shorthands.
+	     *
+	     * @private
+	     * @param {Array} [array] The array to iterate over.
+	     * @param {Function} predicate The function invoked per iteration.
+	     * @returns {boolean} Returns `true` if any element passes the predicate check,
+	     *  else `false`.
+	     */
 
-	    _cache$2.data[item.id] = item;
-	    updateRtree$2(encodeIssueRtree$2(item), true); // true = replace
-	    return item;
-	  },
 
-	  // Remove a single QAItem from the cache
-	  removeItem: function removeItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) { return; }
+	    function arraySome(array, predicate) {
+	      var index = -1,
+	          length = array == null ? 0 : array.length;
 
-	    delete _cache$2.data[item.id];
-	    updateRtree$2(encodeIssueRtree$2(item), false); // false = remove
-	  },
+	      while (++index < length) {
+	        if (predicate(array[index], index, array)) {
+	          return true;
+	        }
+	      }
 
-	  // Used to populate `closed:osmose:*` changeset tags
-	  getClosedCounts: function getClosedCounts() {
-	    return _cache$2.closed;
-	  },
+	      return false;
+	    }
+	    /**
+	     * Gets the size of an ASCII `string`.
+	     *
+	     * @private
+	     * @param {string} string The string inspect.
+	     * @returns {number} Returns the string size.
+	     */
 
-	  itemURL: function itemURL(item) {
-	    return ("https://osmose.openstreetmap.fr/en/error/" + (item.id));
-	  }
-	};
 
-	/*
-	    A standalone SVG element that contains only a `defs` sub-element. To be
-	    used once globally, since defs IDs must be unique within a document.
-	*/
-	function svgDefs(context) {
+	    var asciiSize = baseProperty('length');
+	    /**
+	     * Converts an ASCII `string` to an array.
+	     *
+	     * @private
+	     * @param {string} string The string to convert.
+	     * @returns {Array} Returns the converted array.
+	     */
 
-	    function drawDefs(selection) {
-	        var defs = selection.append('defs');
-
-	        // add markers
-	        defs
-	            .append('marker')
-	            .attr('id', 'ideditor-oneway-marker')
-	            .attr('viewBox', '0 0 10 5')
-	            .attr('refX', 2.5)
-	            .attr('refY', 2.5)
-	            .attr('markerWidth', 2)
-	            .attr('markerHeight', 2)
-	            .attr('markerUnits', 'strokeWidth')
-	            .attr('orient', 'auto')
-	            .append('path')
-	            .attr('class', 'oneway-marker-path')
-	            .attr('d', 'M 5,3 L 0,3 L 0,2 L 5,2 L 5,0 L 10,2.5 L 5,5 z')
-	            .attr('stroke', 'none')
-	            .attr('fill', '#000')
-	            .attr('opacity', '0.75');
-
-	        // SVG markers have to be given a colour where they're defined
-	        // (they can't inherit it from the line they're attached to),
-	        // so we need to manually define markers for each color of tag
-	        // (also, it's slightly nicer if we can control the
-	        // positioning for different tags)
-	        function addSidedMarker(name, color, offset) {
-	            defs
-	                .append('marker')
-	                .attr('id', 'ideditor-sided-marker-' + name)
-	                .attr('viewBox', '0 0 2 2')
-	                .attr('refX', 1)
-	                .attr('refY', -offset)
-	                .attr('markerWidth', 1.5)
-	                .attr('markerHeight', 1.5)
-	                .attr('markerUnits', 'strokeWidth')
-	                .attr('orient', 'auto')
-	                .append('path')
-	                .attr('class', 'sided-marker-path sided-marker-' + name + '-path')
-	                .attr('d', 'M 0,0 L 1,1 L 2,0 z')
-	                .attr('stroke', 'none')
-	                .attr('fill', color);
-	        }
-	        addSidedMarker('natural', 'rgb(170, 170, 170)', 0);
-	        // for a coastline, the arrows are (somewhat unintuitively) on
-	        // the water side, so let's color them blue (with a gap) to
-	        // give a stronger indication
-	        addSidedMarker('coastline', '#77dede', 1);
-	        addSidedMarker('waterway', '#77dede', 1);
-	        // barriers have a dashed line, and separating the triangle
-	        // from the line visually suits that
-	        addSidedMarker('barrier', '#ddd', 1);
-	        addSidedMarker('man_made', '#fff', 0);
-
-	        defs
-	            .append('marker')
-	            .attr('id', 'ideditor-viewfield-marker')
-	            .attr('viewBox', '0 0 16 16')
-	            .attr('refX', 8)
-	            .attr('refY', 16)
-	            .attr('markerWidth', 4)
-	            .attr('markerHeight', 4)
-	            .attr('markerUnits', 'strokeWidth')
-	            .attr('orient', 'auto')
-	            .append('path')
-	            .attr('class', 'viewfield-marker-path')
-	            .attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z')
-	            .attr('fill', '#333')
-	            .attr('fill-opacity', '0.75')
-	            .attr('stroke', '#fff')
-	            .attr('stroke-width', '0.5px')
-	            .attr('stroke-opacity', '0.75');
-
-	        defs
-	            .append('marker')
-	            .attr('id', 'ideditor-viewfield-marker-wireframe')
-	            .attr('viewBox', '0 0 16 16')
-	            .attr('refX', 8)
-	            .attr('refY', 16)
-	            .attr('markerWidth', 4)
-	            .attr('markerHeight', 4)
-	            .attr('markerUnits', 'strokeWidth')
-	            .attr('orient', 'auto')
-	            .append('path')
-	            .attr('class', 'viewfield-marker-path')
-	            .attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z')
-	            .attr('fill', 'none')
-	            .attr('stroke', '#fff')
-	            .attr('stroke-width', '0.5px')
-	            .attr('stroke-opacity', '0.75');
-
-	        // add patterns
-	        var patterns = defs.selectAll('pattern')
-	            .data([
-	                // pattern name, pattern image name
-	                ['beach', 'dots'],
-	                ['construction', 'construction'],
-	                ['cemetery', 'cemetery'],
-	                ['cemetery_christian', 'cemetery_christian'],
-	                ['cemetery_buddhist', 'cemetery_buddhist'],
-	                ['cemetery_muslim', 'cemetery_muslim'],
-	                ['cemetery_jewish', 'cemetery_jewish'],
-	                ['farmland', 'farmland'],
-	                ['farmyard', 'farmyard'],
-	                ['forest', 'forest'],
-	                ['forest_broadleaved', 'forest_broadleaved'],
-	                ['forest_needleleaved', 'forest_needleleaved'],
-	                ['forest_leafless', 'forest_leafless'],
-	                ['golf_green', 'grass'],
-	                ['grass', 'grass'],
-	                ['landfill', 'landfill'],
-	                ['meadow', 'grass'],
-	                ['orchard', 'orchard'],
-	                ['pond', 'pond'],
-	                ['quarry', 'quarry'],
-	                ['scrub', 'bushes'],
-	                ['vineyard', 'vineyard'],
-	                ['water_standing', 'lines'],
-	                ['waves', 'waves'],
-	                ['wetland', 'wetland'],
-	                ['wetland_marsh', 'wetland_marsh'],
-	                ['wetland_swamp', 'wetland_swamp'],
-	                ['wetland_bog', 'wetland_bog'],
-	                ['wetland_reedbed', 'wetland_reedbed']
-	            ])
-	            .enter()
-	            .append('pattern')
-	            .attr('id', function (d) { return 'ideditor-pattern-' + d[0]; })
-	            .attr('width', 32)
-	            .attr('height', 32)
-	            .attr('patternUnits', 'userSpaceOnUse');
-
-	        patterns
-	            .append('rect')
-	            .attr('x', 0)
-	            .attr('y', 0)
-	            .attr('width', 32)
-	            .attr('height', 32)
-	            .attr('class', function (d) { return 'pattern-color-' + d[0]; });
-
-	        patterns
-	            .append('image')
-	            .attr('x', 0)
-	            .attr('y', 0)
-	            .attr('width', 32)
-	            .attr('height', 32)
-	            .attr('xlink:href', function (d) {
-	                return context.imagePath('pattern/' + d[1] + '.png');
-	            });
+	    function asciiToArray(string) {
+	      return string.split('');
+	    }
+	    /**
+	     * Splits an ASCII `string` into an array of its words.
+	     *
+	     * @private
+	     * @param {string} The string to inspect.
+	     * @returns {Array} Returns the words of `string`.
+	     */
 
-	        // add clip paths
-	        defs.selectAll('clipPath')
-	            .data([12, 18, 20, 32, 45])
-	            .enter()
-	            .append('clipPath')
-	            .attr('id', function (d) { return 'ideditor-clip-square-' + d; })
-	            .append('rect')
-	            .attr('x', 0)
-	            .attr('y', 0)
-	            .attr('width', function (d) { return d; })
-	            .attr('height', function (d) { return d; });
 
-	        // add symbol spritesheets
-	        defs
-	            .call(drawDefs.addSprites, [
-	                'iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'tnp-sprite', 'community-sprite'
-	            ], true);
+	    function asciiWords(string) {
+	      return string.match(reAsciiWord) || [];
 	    }
+	    /**
+	     * The base implementation of methods like `_.findKey` and `_.findLastKey`,
+	     * without support for iteratee shorthands, which iterates over `collection`
+	     * using `eachFunc`.
+	     *
+	     * @private
+	     * @param {Array|Object} collection The collection to inspect.
+	     * @param {Function} predicate The function invoked per iteration.
+	     * @param {Function} eachFunc The function to iterate over `collection`.
+	     * @returns {*} Returns the found element or its key, else `undefined`.
+	     */
 
 
-	    drawDefs.addSprites = function(selection, ids, overrideColors) {
-	        var spritesheets = selection.selectAll('.spritesheet');
-	        var currData = spritesheets.data();
-	        var data = utilArrayUniq(currData.concat(ids));
-
-	        spritesheets
-	            .data(data)
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'spritesheet spritesheet-' + d; })
-	            .each(function(d) {
-	                var url = context.imagePath(d + '.svg');
-	                var node = select(this).node();
-
-	                svg(url)
-	                    .then(function(svg) {
-	                        node.appendChild(
-	                            select(svg.documentElement).attr('id', 'ideditor-' + d).node()
-	                        );
-	                        if (overrideColors && d !== 'iD-sprite') {   // allow icon colors to be overridden..
-	                            select(node).selectAll('path')
-	                                .attr('fill', 'currentColor');
-	                        }
-	                    })
-	                    .catch(function() {
-	                        /* ignore */
-	                    });
-	            });
-	    };
+	    function baseFindKey(collection, predicate, eachFunc) {
+	      var result;
+	      eachFunc(collection, function (value, key, collection) {
+	        if (predicate(value, key, collection)) {
+	          result = key;
+	          return false;
+	        }
+	      });
+	      return result;
+	    }
+	    /**
+	     * The base implementation of `_.findIndex` and `_.findLastIndex` without
+	     * support for iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} array The array to inspect.
+	     * @param {Function} predicate The function invoked per iteration.
+	     * @param {number} fromIndex The index to search from.
+	     * @param {boolean} [fromRight] Specify iterating from right to left.
+	     * @returns {number} Returns the index of the matched value, else `-1`.
+	     */
 
 
-	    return drawDefs;
-	}
-
-	/* global Mapillary:false */
-
-
-	var apibase = 'https://a.mapillary.com/v3/';
-	var viewercss = 'mapillary-js/mapillary.min.css';
-	var viewerjs = 'mapillary-js/mapillary.min.js';
-	var clientId = 'NzNRM2otQkR2SHJzaXJmNmdQWVQ0dzo1ZWYyMmYwNjdmNDdlNmVi';
-	var mapFeatureConfig = {
-	    values: [
-	        'construction--flat--crosswalk-plain',
-	        'marking--discrete--crosswalk-zebra',
-	        'object--banner',
-	        'object--bench',
-	        'object--bike-rack',
-	        'object--billboard',
-	        'object--catch-basin',
-	        'object--cctv-camera',
-	        'object--fire-hydrant',
-	        'object--mailbox',
-	        'object--manhole',
-	        'object--phone-booth',
-	        'object--sign--advertisement',
-	        'object--sign--information',
-	        'object--sign--store',
-	        'object--street-light',
-	        'object--support--utility-pole',
-	        'object--traffic-light--*',
-	        'object--traffic-light--pedestrians',
-	        'object--trash-can'
-	    ].join(',')
-	};
-	var maxResults = 1000;
-	var tileZoom = 14;
-	var tiler$3 = utilTiler().zoomExtent([tileZoom, tileZoom]).skipNullIsland(true);
-	var dispatch$4 = dispatch('loadedImages', 'loadedSigns', 'loadedMapFeatures', 'bearingChanged');
-	var _mlyFallback = false;
-	var _mlyCache;
-	var _mlyClicks;
-	var _mlySelectedImageKey;
-	var _mlyViewer;
+	    function baseFindIndex(array, predicate, fromIndex, fromRight) {
+	      var length = array.length,
+	          index = fromIndex + (fromRight ? 1 : -1);
 
+	      while (fromRight ? index-- : ++index < length) {
+	        if (predicate(array[index], index, array)) {
+	          return index;
+	        }
+	      }
 
-	function abortRequest$3(controller) {
-	    controller.abort();
-	}
+	      return -1;
+	    }
+	    /**
+	     * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
+	     *
+	     * @private
+	     * @param {Array} array The array to inspect.
+	     * @param {*} value The value to search for.
+	     * @param {number} fromIndex The index to search from.
+	     * @returns {number} Returns the index of the matched value, else `-1`.
+	     */
 
 
-	function maxPageAtZoom(z) {
-	    if (z < 15)   { return 2; }
-	    if (z === 15) { return 5; }
-	    if (z === 16) { return 10; }
-	    if (z === 17) { return 20; }
-	    if (z === 18) { return 40; }
-	    if (z > 18)   { return 80; }
-	}
+	    function baseIndexOf(array, value, fromIndex) {
+	      return value === value ? strictIndexOf(array, value, fromIndex) : baseFindIndex(array, baseIsNaN, fromIndex);
+	    }
+	    /**
+	     * This function is like `baseIndexOf` except that it accepts a comparator.
+	     *
+	     * @private
+	     * @param {Array} array The array to inspect.
+	     * @param {*} value The value to search for.
+	     * @param {number} fromIndex The index to search from.
+	     * @param {Function} comparator The comparator invoked per element.
+	     * @returns {number} Returns the index of the matched value, else `-1`.
+	     */
 
 
-	function loadTiles(which, url, projection) {
-	    var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
-	    var tiles = tiler$3.getTiles(projection);
+	    function baseIndexOfWith(array, value, fromIndex, comparator) {
+	      var index = fromIndex - 1,
+	          length = array.length;
 
-	    // abort inflight requests that are no longer needed
-	    var cache = _mlyCache[which];
-	    Object.keys(cache.inflight).forEach(function(k) {
-	        var wanted = tiles.find(function(tile) { return k.indexOf(tile.id + ',') === 0; });
-	        if (!wanted) {
-	            abortRequest$3(cache.inflight[k]);
-	            delete cache.inflight[k];
+	      while (++index < length) {
+	        if (comparator(array[index], value)) {
+	          return index;
 	        }
-	    });
-
-	    tiles.forEach(function(tile) {
-	        loadNextTilePage(which, currZoom, url, tile);
-	    });
-	}
-
+	      }
 
-	function loadNextTilePage(which, currZoom, url, tile) {
-	    var cache = _mlyCache[which];
-	    var rect = tile.extent.rectangle();
-	    var maxPages = maxPageAtZoom(currZoom);
-	    var nextPage = cache.nextPage[tile.id] || 0;
-	    var nextURL = cache.nextURL[tile.id] || url +
-	        utilQsString({
-	            per_page: maxResults,
-	            page: nextPage,
-	            client_id: clientId,
-	            bbox: [rect[0], rect[1], rect[2], rect[3]].join(','),
-	        });
+	      return -1;
+	    }
+	    /**
+	     * The base implementation of `_.isNaN` without support for number objects.
+	     *
+	     * @private
+	     * @param {*} value The value to check.
+	     * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+	     */
 
-	    if (nextPage > maxPages) { return; }
 
-	    var id = tile.id + ',' + String(nextPage);
-	    if (cache.loaded[id] || cache.inflight[id]) { return; }
+	    function baseIsNaN(value) {
+	      return value !== value;
+	    }
+	    /**
+	     * The base implementation of `_.mean` and `_.meanBy` without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} array The array to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @returns {number} Returns the mean.
+	     */
 
-	    var controller = new AbortController();
-	    cache.inflight[id] = controller;
 
-	    var options = {
-	        method: 'GET',
-	        signal: controller.signal,
-	        headers: { 'Content-Type': 'application/json' }
-	    };
+	    function baseMean(array, iteratee) {
+	      var length = array == null ? 0 : array.length;
+	      return length ? baseSum(array, iteratee) / length : NAN;
+	    }
+	    /**
+	     * The base implementation of `_.property` without support for deep paths.
+	     *
+	     * @private
+	     * @param {string} key The key of the property to get.
+	     * @returns {Function} Returns the new accessor function.
+	     */
 
-	    fetch(nextURL, options)
-	        .then(function(response) {
-	            if (!response.ok) {
-	                throw new Error(response.status + ' ' + response.statusText);
-	            }
-	            var linkHeader = response.headers.get('Link');
-	            if (linkHeader) {
-	                var pagination = parsePagination(linkHeader);
-	                if (pagination.next) {
-	                    cache.nextURL[tile.id] = pagination.next;
-	                }
-	            }
-	            return response.json();
-	        })
-	        .then(function(data) {
-	            cache.loaded[id] = true;
-	            delete cache.inflight[id];
-	            if (!data || !data.features || !data.features.length) {
-	                throw new Error('No Data');
-	            }
 
-	            var features = data.features.map(function(feature) {
-	                var loc = feature.geometry.coordinates;
-	                var d;
-
-	                // An image (shown as a green dot on the map) is a single street photo with extra
-	                // information such as location, camera angle (CA), camera model, and so on.
-	                // Each image feature is a GeoJSON Point
-	                if (which === 'images') {
-	                    d = {
-	                        loc: loc,
-	                        key: feature.properties.key,
-	                        ca: feature.properties.ca,
-	                        captured_at: feature.properties.captured_at,
-	                        captured_by: feature.properties.username,
-	                        pano: feature.properties.pano
-	                    };
-
-	                    cache.forImageKey[d.key] = d;     // cache imageKey -> image
-
-	                // Mapillary organizes images as sequences. A sequence of images are continuously captured
-	                // by a user at a give time. Sequences are shown on the map as green lines.
-	                // Each sequence feature is a GeoJSON LineString
-	                } else if (which === 'sequences') {
-	                    var sequenceKey = feature.properties.key;
-	                    cache.lineString[sequenceKey] = feature;           // cache sequenceKey -> lineString
-	                    feature.properties.coordinateProperties.image_keys.forEach(function(imageKey) {
-	                        cache.forImageKey[imageKey] = sequenceKey;     // cache imageKey -> sequenceKey
-	                    });
-	                    return false;    // because no `d` data worth loading into an rbush
-
-	                // An image detection is a semantic pixel area on an image. The area could indicate
-	                // sky, trees, sidewalk in the image. A detection can be a polygon, a bounding box, or a point.
-	                // Each image_detection feature is a GeoJSON Point (located where the image was taken)
-	                } else if (which === 'image_detections') {
-	                    d = {
-	                        key: feature.properties.key,
-	                        image_key: feature.properties.image_key,
-	                        value: feature.properties.value,
-	                        package: feature.properties.package,
-	                        shape: feature.properties.shape
-	                    };
-
-	                    // cache imageKey -> image_detections
-	                    if (!cache.forImageKey[d.image_key]) {
-	                        cache.forImageKey[d.image_key] = [];
-	                    }
-	                    cache.forImageKey[d.image_key].push(d);
-	                    return false;    // because no `d` data worth loading into an rbush
-
-
-	                // A map feature is a real world object that can be shown on a map. It could be any object
-	                // recognized from images, manually added in images, or added on the map.
-	                // Each map feature is a GeoJSON Point (located where the feature is)
-	                } else if (which === 'map_features' || which === 'points') {
-	                    d = {
-	                        loc: loc,
-	                        key: feature.properties.key,
-	                        value: feature.properties.value,
-	                        package: feature.properties.package,
-	                        detections: feature.properties.detections
-	                    };
-	                }
+	    function baseProperty(key) {
+	      return function (object) {
+	        return object == null ? undefined$1 : object[key];
+	      };
+	    }
+	    /**
+	     * The base implementation of `_.propertyOf` without support for deep paths.
+	     *
+	     * @private
+	     * @param {Object} object The object to query.
+	     * @returns {Function} Returns the new accessor function.
+	     */
 
-	                return {
-	                    minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1], data: d
-	                };
 
-	            }).filter(Boolean);
+	    function basePropertyOf(object) {
+	      return function (key) {
+	        return object == null ? undefined$1 : object[key];
+	      };
+	    }
+	    /**
+	     * The base implementation of `_.reduce` and `_.reduceRight`, without support
+	     * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
+	     *
+	     * @private
+	     * @param {Array|Object} collection The collection to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @param {*} accumulator The initial value.
+	     * @param {boolean} initAccum Specify using the first or last element of
+	     *  `collection` as the initial value.
+	     * @param {Function} eachFunc The function to iterate over `collection`.
+	     * @returns {*} Returns the accumulated value.
+	     */
 
-	            if (cache.rtree && features) {
-	                cache.rtree.load(features);
-	            }
 
-	            if (data.features.length === maxResults) {  // more pages to load
-	                cache.nextPage[tile.id] = nextPage + 1;
-	                loadNextTilePage(which, currZoom, url, tile);
-	            } else {
-	                cache.nextPage[tile.id] = Infinity;     // no more pages to load
-	            }
+	    function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
+	      eachFunc(collection, function (value, index, collection) {
+	        accumulator = initAccum ? (initAccum = false, value) : iteratee(accumulator, value, index, collection);
+	      });
+	      return accumulator;
+	    }
+	    /**
+	     * The base implementation of `_.sortBy` which uses `comparer` to define the
+	     * sort order of `array` and replaces criteria objects with their corresponding
+	     * values.
+	     *
+	     * @private
+	     * @param {Array} array The array to sort.
+	     * @param {Function} comparer The function to define sort order.
+	     * @returns {Array} Returns `array`.
+	     */
 
-	            if (which === 'images' || which === 'sequences') {
-	                dispatch$4.call('loadedImages');
-	            } else if (which === 'map_features') {
-	                dispatch$4.call('loadedSigns');
-	            } else if (which === 'points') {
-	                dispatch$4.call('loadedMapFeatures');
-	            }
-	        })
-	        .catch(function() {
-	            cache.loaded[id] = true;
-	            delete cache.inflight[id];
-	        });
-	}
 
-	// extract links to pages of API results
-	function parsePagination(links) {
-	    return links.split(',').map(function(rel) {
-	        var elements = rel.split(';');
-	        if (elements.length === 2) {
-	            return [
-	                /<(.+)>/.exec(elements[0])[1],
-	                /rel="(.+)"/.exec(elements[1])[1]
-	            ];
-	        } else {
-	            return ['',''];
-	        }
-	    }).reduce(function(pagination, val) {
-	        pagination[val[1]] = val[0];
-	        return pagination;
-	    }, {});
-	}
+	    function baseSortBy(array, comparer) {
+	      var length = array.length;
+	      array.sort(comparer);
 
+	      while (length--) {
+	        array[length] = array[length].value;
+	      }
 
-	// partition viewport into higher zoom tiles
-	function partitionViewport(projection) {
-	    var z = geoScaleToZoom(projection.scale());
-	    var z2 = (Math.ceil(z * 2) / 2) + 2.5;   // round to next 0.5 and add 2.5
-	    var tiler = utilTiler().zoomExtent([z2, z2]);
+	      return array;
+	    }
+	    /**
+	     * The base implementation of `_.sum` and `_.sumBy` without support for
+	     * iteratee shorthands.
+	     *
+	     * @private
+	     * @param {Array} array The array to iterate over.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @returns {number} Returns the sum.
+	     */
 
-	    return tiler.getTiles(projection)
-	        .map(function(tile) { return tile.extent; });
-	}
 
+	    function baseSum(array, iteratee) {
+	      var result,
+	          index = -1,
+	          length = array.length;
 
-	// no more than `limit` results per partition.
-	function searchLimited(limit, projection, rtree) {
-	    limit = limit || 5;
+	      while (++index < length) {
+	        var current = iteratee(array[index]);
 
-	    return partitionViewport(projection)
-	        .reduce(function(result, extent) {
-	            var found = rtree.search(extent.bbox())
-	                .slice(0, limit)
-	                .map(function(d) { return d.data; });
+	        if (current !== undefined$1) {
+	          result = result === undefined$1 ? current : result + current;
+	        }
+	      }
 
-	            return (found.length ? result.concat(found) : result);
-	        }, []);
-	}
+	      return result;
+	    }
+	    /**
+	     * The base implementation of `_.times` without support for iteratee shorthands
+	     * or max array length checks.
+	     *
+	     * @private
+	     * @param {number} n The number of times to invoke `iteratee`.
+	     * @param {Function} iteratee The function invoked per iteration.
+	     * @returns {Array} Returns the array of results.
+	     */
 
 
+	    function baseTimes(n, iteratee) {
+	      var index = -1,
+	          result = Array(n);
 
-	var serviceMapillary = {
+	      while (++index < n) {
+	        result[index] = iteratee(index);
+	      }
 
-	    init: function() {
-	        if (!_mlyCache) {
-	            this.reset();
-	        }
+	      return result;
+	    }
+	    /**
+	     * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
+	     * of key-value pairs for `object` corresponding to the property names of `props`.
+	     *
+	     * @private
+	     * @param {Object} object The object to query.
+	     * @param {Array} props The property names to get values for.
+	     * @returns {Object} Returns the key-value pairs.
+	     */
 
-	        this.event = utilRebind(this, dispatch$4, 'on');
-	    },
 
-	    reset: function() {
-	        if (_mlyCache) {
-	            Object.values(_mlyCache.images.inflight).forEach(abortRequest$3);
-	            Object.values(_mlyCache.image_detections.inflight).forEach(abortRequest$3);
-	            Object.values(_mlyCache.map_features.inflight).forEach(abortRequest$3);
-	            Object.values(_mlyCache.points.inflight).forEach(abortRequest$3);
-	            Object.values(_mlyCache.sequences.inflight).forEach(abortRequest$3);
-	        }
-
-	        _mlyCache = {
-	            images: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush(), forImageKey: {} },
-	            image_detections: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, forImageKey: {} },
-	            map_features: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush() },
-	            points: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush() },
-	            sequences: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush(), forImageKey: {}, lineString: {} }
-	        };
+	    function baseToPairs(object, props) {
+	      return arrayMap(props, function (key) {
+	        return [key, object[key]];
+	      });
+	    }
+	    /**
+	     * The base implementation of `_.trim`.
+	     *
+	     * @private
+	     * @param {string} string The string to trim.
+	     * @returns {string} Returns the trimmed string.
+	     */
 
-	        _mlySelectedImageKey = null;
-	        _mlyClicks = [];
-	    },
 
+	    function baseTrim(string) {
+	      return string ? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, '') : string;
+	    }
+	    /**
+	     * The base implementation of `_.unary` without support for storing metadata.
+	     *
+	     * @private
+	     * @param {Function} func The function to cap arguments for.
+	     * @returns {Function} Returns the new capped function.
+	     */
 
-	    images: function(projection) {
-	        var limit = 5;
-	        return searchLimited(limit, projection, _mlyCache.images.rtree);
-	    },
 
+	    function baseUnary(func) {
+	      return function (value) {
+	        return func(value);
+	      };
+	    }
+	    /**
+	     * The base implementation of `_.values` and `_.valuesIn` which creates an
+	     * array of `object` property values corresponding to the property names
+	     * of `props`.
+	     *
+	     * @private
+	     * @param {Object} object The object to query.
+	     * @param {Array} props The property names to get values for.
+	     * @returns {Object} Returns the array of property values.
+	     */
 
-	    signs: function(projection) {
-	        var limit = 5;
-	        return searchLimited(limit, projection, _mlyCache.map_features.rtree);
-	    },
 
+	    function baseValues(object, props) {
+	      return arrayMap(props, function (key) {
+	        return object[key];
+	      });
+	    }
+	    /**
+	     * Checks if a `cache` value for `key` exists.
+	     *
+	     * @private
+	     * @param {Object} cache The cache to query.
+	     * @param {string} key The key of the entry to check.
+	     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+	     */
 
-	    mapFeatures: function(projection) {
-	        var limit = 5;
-	        return searchLimited(limit, projection, _mlyCache.points.rtree);
-	    },
 
+	    function cacheHas(cache, key) {
+	      return cache.has(key);
+	    }
+	    /**
+	     * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
+	     * that is not found in the character symbols.
+	     *
+	     * @private
+	     * @param {Array} strSymbols The string symbols to inspect.
+	     * @param {Array} chrSymbols The character symbols to find.
+	     * @returns {number} Returns the index of the first unmatched string symbol.
+	     */
 
-	    cachedImage: function(imageKey) {
-	        return _mlyCache.images.forImageKey[imageKey];
-	    },
 
+	    function charsStartIndex(strSymbols, chrSymbols) {
+	      var index = -1,
+	          length = strSymbols.length;
 
-	    sequences: function(projection) {
-	        var viewport = projection.clipExtent();
-	        var min = [viewport[0][0], viewport[1][1]];
-	        var max = [viewport[1][0], viewport[0][1]];
-	        var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-	        var sequenceKeys = {};
+	      while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
 
-	        // all sequences for images in viewport
-	        _mlyCache.images.rtree.search(bbox)
-	            .forEach(function(d) {
-	                var sequenceKey = _mlyCache.sequences.forImageKey[d.data.key];
-	                if (sequenceKey) {
-	                    sequenceKeys[sequenceKey] = true;
-	                }
-	            });
+	      return index;
+	    }
+	    /**
+	     * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
+	     * that is not found in the character symbols.
+	     *
+	     * @private
+	     * @param {Array} strSymbols The string symbols to inspect.
+	     * @param {Array} chrSymbols The character symbols to find.
+	     * @returns {number} Returns the index of the last unmatched string symbol.
+	     */
 
-	        // Return lineStrings for the sequences
-	        return Object.keys(sequenceKeys).map(function(sequenceKey) {
-	            return _mlyCache.sequences.lineString[sequenceKey];
-	        });
-	    },
 
+	    function charsEndIndex(strSymbols, chrSymbols) {
+	      var index = strSymbols.length;
 
-	    signsSupported: function() {
-	        return true;
-	    },
+	      while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
 
+	      return index;
+	    }
+	    /**
+	     * Gets the number of `placeholder` occurrences in `array`.
+	     *
+	     * @private
+	     * @param {Array} array The array to inspect.
+	     * @param {*} placeholder The placeholder to search for.
+	     * @returns {number} Returns the placeholder count.
+	     */
 
-	    loadImages: function(projection) {
-	        loadTiles('images', apibase + 'images?sort_by=key&', projection);
-	        loadTiles('sequences', apibase + 'sequences?sort_by=key&', projection);
-	    },
 
+	    function countHolders(array, placeholder) {
+	      var length = array.length,
+	          result = 0;
 
-	    loadSigns: function(projection) {
-	        // if we are looking at signs, we'll actually need to fetch images too
-	        loadTiles('images', apibase + 'images?sort_by=key&', projection);
-	        loadTiles('map_features', apibase + 'map_features?layers=trafficsigns&min_nbr_image_detections=2&sort_by=key&', projection);
-	        loadTiles('image_detections', apibase + 'image_detections?layers=trafficsigns&sort_by=key&', projection);
-	    },
+	      while (length--) {
+	        if (array[length] === placeholder) {
+	          ++result;
+	        }
+	      }
 
+	      return result;
+	    }
+	    /**
+	     * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
+	     * letters to basic Latin letters.
+	     *
+	     * @private
+	     * @param {string} letter The matched letter to deburr.
+	     * @returns {string} Returns the deburred letter.
+	     */
 
-	    loadMapFeatures: function(projection) {
-	        // if we are looking at signs, we'll actually need to fetch images too
-	        loadTiles('images', apibase + 'images?sort_by=key', projection);
-	        loadTiles('points', apibase + 'map_features?layers=points&min_nbr_image_detections=2&sort_by=key&values=' + mapFeatureConfig.values + '&', projection);
-	        loadTiles('image_detections', apibase + 'image_detections?layers=points&sort_by=key&values=' + mapFeatureConfig.values + '&', projection);
-	    },
 
+	    var deburrLetter = basePropertyOf(deburredLetters);
+	    /**
+	     * Used by `_.escape` to convert characters to HTML entities.
+	     *
+	     * @private
+	     * @param {string} chr The matched character to escape.
+	     * @returns {string} Returns the escaped character.
+	     */
 
-	    loadViewer: function(context) {
-	        // add mly-wrapper
-	        var wrap = context.container().select('.photoviewer')
-	            .selectAll('.mly-wrapper')
-	            .data([0]);
+	    var escapeHtmlChar = basePropertyOf(htmlEscapes);
+	    /**
+	     * Used by `_.template` to escape characters for inclusion in compiled string literals.
+	     *
+	     * @private
+	     * @param {string} chr The matched character to escape.
+	     * @returns {string} Returns the escaped character.
+	     */
 
-	        wrap.enter()
-	            .append('div')
-	            .attr('id', 'ideditor-mly')
-	            .attr('class', 'photo-wrapper mly-wrapper')
-	            .classed('hide', true);
+	    function escapeStringChar(chr) {
+	      return '\\' + stringEscapes[chr];
+	    }
+	    /**
+	     * Gets the value at `key` of `object`.
+	     *
+	     * @private
+	     * @param {Object} [object] The object to query.
+	     * @param {string} key The key of the property to get.
+	     * @returns {*} Returns the property value.
+	     */
 
-	        // load mapillary-viewercss
-	        select('head').selectAll('#ideditor-mapillary-viewercss')
-	            .data([0])
-	            .enter()
-	            .append('link')
-	            .attr('id', 'ideditor-mapillary-viewercss')
-	            .attr('rel', 'stylesheet')
-	            .attr('href', context.asset(viewercss));
 
-	        // load mapillary-viewerjs
-	        select('head').selectAll('#ideditor-mapillary-viewerjs')
-	            .data([0])
-	            .enter()
-	            .append('script')
-	            .attr('id', 'ideditor-mapillary-viewerjs')
-	            .attr('src', context.asset(viewerjs));
-
-	        // load mapillary signs sprite
-	        var defs = context.container().select('defs');
-	        defs.call(svgDefs(context).addSprites, ['mapillary-sprite', 'mapillary-object-sprite'], false /* don't override colors */ );
-
-	        // Register viewer resize handler
-	        context.ui().photoviewer.on('resize.mapillary', function() {
-	            if (_mlyViewer) {
-	                _mlyViewer.resize();
-	            }
-	        });
-	    },
+	    function getValue(object, key) {
+	      return object == null ? undefined$1 : object[key];
+	    }
+	    /**
+	     * Checks if `string` contains Unicode symbols.
+	     *
+	     * @private
+	     * @param {string} string The string to inspect.
+	     * @returns {boolean} Returns `true` if a symbol is found, else `false`.
+	     */
 
 
-	    showViewer: function(context) {
-	        var wrap = context.container().select('.photoviewer')
-	            .classed('hide', false);
+	    function hasUnicode(string) {
+	      return reHasUnicode.test(string);
+	    }
+	    /**
+	     * Checks if `string` contains a word composed of Unicode symbols.
+	     *
+	     * @private
+	     * @param {string} string The string to inspect.
+	     * @returns {boolean} Returns `true` if a word is found, else `false`.
+	     */
 
-	        var isHidden = wrap.selectAll('.photo-wrapper.mly-wrapper.hide').size();
 
-	        if (isHidden && _mlyViewer) {
-	            wrap
-	                .selectAll('.photo-wrapper:not(.mly-wrapper)')
-	                .classed('hide', true);
+	    function hasUnicodeWord(string) {
+	      return reHasUnicodeWord.test(string);
+	    }
+	    /**
+	     * Converts `iterator` to an array.
+	     *
+	     * @private
+	     * @param {Object} iterator The iterator to convert.
+	     * @returns {Array} Returns the converted array.
+	     */
 
-	            wrap
-	                .selectAll('.photo-wrapper.mly-wrapper')
-	                .classed('hide', false);
 
-	            _mlyViewer.resize();
-	        }
+	    function iteratorToArray(iterator) {
+	      var data,
+	          result = [];
 
-	        return this;
-	    },
+	      while (!(data = iterator.next()).done) {
+	        result.push(data.value);
+	      }
 
+	      return result;
+	    }
+	    /**
+	     * Converts `map` to its key-value pairs.
+	     *
+	     * @private
+	     * @param {Object} map The map to convert.
+	     * @returns {Array} Returns the key-value pairs.
+	     */
 
-	    hideViewer: function(context) {
-	        _mlySelectedImageKey = null;
 
-	        if (!_mlyFallback && _mlyViewer) {
-	            _mlyViewer.getComponent('sequence').stop();
-	        }
+	    function mapToArray(map) {
+	      var index = -1,
+	          result = Array(map.size);
+	      map.forEach(function (value, key) {
+	        result[++index] = [key, value];
+	      });
+	      return result;
+	    }
+	    /**
+	     * Creates a unary function that invokes `func` with its argument transformed.
+	     *
+	     * @private
+	     * @param {Function} func The function to wrap.
+	     * @param {Function} transform The argument transform.
+	     * @returns {Function} Returns the new function.
+	     */
 
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(null); }
 
-	        viewer
-	            .classed('hide', true)
-	            .selectAll('.photo-wrapper')
-	            .classed('hide', true);
+	    function overArg(func, transform) {
+	      return function (arg) {
+	        return func(transform(arg));
+	      };
+	    }
+	    /**
+	     * Replaces all `placeholder` elements in `array` with an internal placeholder
+	     * and returns an array of their indexes.
+	     *
+	     * @private
+	     * @param {Array} array The array to modify.
+	     * @param {*} placeholder The placeholder to replace.
+	     * @returns {Array} Returns the new array of placeholder indexes.
+	     */
 
-	        context.container().selectAll('.viewfield-group, .sequence, .icon-detected')
-	            .classed('currentView', false);
 
-	        return this.setStyles(context, null, true);
-	    },
+	    function replaceHolders(array, placeholder) {
+	      var index = -1,
+	          length = array.length,
+	          resIndex = 0,
+	          result = [];
 
+	      while (++index < length) {
+	        var value = array[index];
 
-	    parsePagination: parsePagination,
+	        if (value === placeholder || value === PLACEHOLDER) {
+	          array[index] = PLACEHOLDER;
+	          result[resIndex++] = index;
+	        }
+	      }
 
+	      return result;
+	    }
+	    /**
+	     * Converts `set` to an array of its values.
+	     *
+	     * @private
+	     * @param {Object} set The set to convert.
+	     * @returns {Array} Returns the values.
+	     */
 
-	    updateViewer: function(context, imageKey) {
-	        if (!imageKey) { return this; }
 
-	        if (!_mlyViewer) {
-	            this.initViewer(context, imageKey);
-	        } else {
-	            _mlyViewer.moveToKey(imageKey)
-	                .catch(function(e) { console.error('mly3', e); });  // eslint-disable-line no-console
-	        }
+	    function setToArray(set) {
+	      var index = -1,
+	          result = Array(set.size);
+	      set.forEach(function (value) {
+	        result[++index] = value;
+	      });
+	      return result;
+	    }
+	    /**
+	     * Converts `set` to its value-value pairs.
+	     *
+	     * @private
+	     * @param {Object} set The set to convert.
+	     * @returns {Array} Returns the value-value pairs.
+	     */
 
-	        return this;
-	    },
 
+	    function setToPairs(set) {
+	      var index = -1,
+	          result = Array(set.size);
+	      set.forEach(function (value) {
+	        result[++index] = [value, value];
+	      });
+	      return result;
+	    }
+	    /**
+	     * A specialized version of `_.indexOf` which performs strict equality
+	     * comparisons of values, i.e. `===`.
+	     *
+	     * @private
+	     * @param {Array} array The array to inspect.
+	     * @param {*} value The value to search for.
+	     * @param {number} fromIndex The index to search from.
+	     * @returns {number} Returns the index of the matched value, else `-1`.
+	     */
 
-	    initViewer: function(context, imageKey) {
-	        var that = this;
-	        if (window.Mapillary && imageKey) {
-	            var opts = {
-	                baseImageSize: 320,
-	                component: {
-	                    cover: false,
-	                    keyboard: false,
-	                    tag: true
-	                }
-	            };
 
-	            // Disable components requiring WebGL support
-	            if (!Mapillary.isSupported() && Mapillary.isFallbackSupported()) {
-	                _mlyFallback = true;
-	                opts.component = {
-	                    cover: false,
-	                    direction: false,
-	                    imagePlane: false,
-	                    keyboard: false,
-	                    mouse: false,
-	                    sequence: false,
-	                    tag: false,
-	                    image: true,        // fallback
-	                    navigation: true    // fallback
-	                };
-	            }
+	    function strictIndexOf(array, value, fromIndex) {
+	      var index = fromIndex - 1,
+	          length = array.length;
 
-	            _mlyViewer = new Mapillary.Viewer('ideditor-mly', clientId, null, opts);
-	            _mlyViewer.on('nodechanged', nodeChanged);
-	            _mlyViewer.on('bearingchanged', bearingChanged);
-	            _mlyViewer.moveToKey(imageKey)
-	                .catch(function(e) { console.error('mly3', e); });  // eslint-disable-line no-console
+	      while (++index < length) {
+	        if (array[index] === value) {
+	          return index;
 	        }
+	      }
 
-	        // nodeChanged: called after the viewer has changed images and is ready.
-	        //
-	        // There is some logic here to batch up clicks into a _mlyClicks array
-	        // because the user might click on a lot of markers quickly and nodechanged
-	        // may be called out of order asychronously.
-	        //
-	        // Clicks are added to the array in `selectedImage` and removed here.
-	        //
-	        function nodeChanged(node) {
-	            if (!_mlyFallback) {
-	                _mlyViewer.getComponent('tag').removeAll();  // remove previous detections
-	            }
+	      return -1;
+	    }
+	    /**
+	     * A specialized version of `_.lastIndexOf` which performs strict equality
+	     * comparisons of values, i.e. `===`.
+	     *
+	     * @private
+	     * @param {Array} array The array to inspect.
+	     * @param {*} value The value to search for.
+	     * @param {number} fromIndex The index to search from.
+	     * @returns {number} Returns the index of the matched value, else `-1`.
+	     */
 
-	            var clicks = _mlyClicks;
-	            var index = clicks.indexOf(node.key);
-	            var selectedKey = _mlySelectedImageKey;
 
-	            if (index > -1) {              // `nodechanged` initiated from clicking on a marker..
-	                clicks.splice(index, 1);   // remove the click
-	                // If `node.key` matches the current _mlySelectedImageKey, call `selectImage()`
-	                // one more time to update the detections and attribution..
-	                if (node.key === selectedKey) {
-	                    that.selectImage(context, _mlySelectedImageKey, true);
-	                }
-	            } else {             // `nodechanged` initiated from the Mapillary viewer controls..
-	                var loc = node.computedLatLon ? [node.computedLatLon.lon, node.computedLatLon.lat] : [node.latLon.lon, node.latLon.lat];
-	                context.map().centerEase(loc);
-	                that.selectImage(context, node.key, true);
-	            }
-	        }
+	    function strictLastIndexOf(array, value, fromIndex) {
+	      var index = fromIndex + 1;
 
-	        function bearingChanged(e) {
-	            dispatch$4.call('bearingChanged', undefined, e);
+	      while (index--) {
+	        if (array[index] === value) {
+	          return index;
 	        }
-	    },
-
+	      }
 
-	    // Pass in the image key string as `imageKey`.
-	    // This allows images to be selected from places that dont have access
-	    // to the full image datum (like the street signs layer or the js viewer)
-	    selectImage: function(context, imageKey, fromViewer) {
+	      return index;
+	    }
+	    /**
+	     * Gets the number of symbols in `string`.
+	     *
+	     * @private
+	     * @param {string} string The string to inspect.
+	     * @returns {number} Returns the string size.
+	     */
 
-	        _mlySelectedImageKey = imageKey;
 
-	        // Note the datum could be missing, but we'll try to carry on anyway.
-	        // There just might be a delay before user sees detections, captured_at, etc.
-	        var d = _mlyCache.images.forImageKey[imageKey];
+	    function stringSize(string) {
+	      return hasUnicode(string) ? unicodeSize(string) : asciiSize(string);
+	    }
+	    /**
+	     * Converts `string` to an array.
+	     *
+	     * @private
+	     * @param {string} string The string to convert.
+	     * @returns {Array} Returns the converted array.
+	     */
 
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(d); }
 
-	        imageKey = (d && d.key) || imageKey;
-	        if (!fromViewer && imageKey) {
-	            _mlyClicks.push(imageKey);
-	        }
+	    function stringToArray(string) {
+	      return hasUnicode(string) ? unicodeToArray(string) : asciiToArray(string);
+	    }
+	    /**
+	     * Used by `_.trim` and `_.trimEnd` to get the index of the last non-whitespace
+	     * character of `string`.
+	     *
+	     * @private
+	     * @param {string} string The string to inspect.
+	     * @returns {number} Returns the index of the last non-whitespace character.
+	     */
 
-	        this.setStyles(context, null, true);
 
-	        // if signs signs are shown, highlight the ones that appear in this image
-	        context.container().selectAll('.layer-mapillary-signs .icon-detected')
-	            .classed('currentView', function(d) {
-	                return d.detections.some(function(detection) {
-	                    return detection.image_key === imageKey;
-	                });
-	            });
+	    function trimmedEndIndex(string) {
+	      var index = string.length;
 
-	        if (d) {
-	            this.updateDetections(d);
-	        }
+	      while (index-- && reWhitespace.test(string.charAt(index))) {}
 
-	        return this;
-	    },
+	      return index;
+	    }
+	    /**
+	     * Used by `_.unescape` to convert HTML entities to characters.
+	     *
+	     * @private
+	     * @param {string} chr The matched character to unescape.
+	     * @returns {string} Returns the unescaped character.
+	     */
 
 
-	    getSelectedImageKey: function() {
-	        return _mlySelectedImageKey;
-	    },
+	    var unescapeHtmlChar = basePropertyOf(htmlUnescapes);
+	    /**
+	     * Gets the size of a Unicode `string`.
+	     *
+	     * @private
+	     * @param {string} string The string inspect.
+	     * @returns {number} Returns the string size.
+	     */
 
+	    function unicodeSize(string) {
+	      var result = reUnicode.lastIndex = 0;
 
-	    getSequenceKeyForImageKey: function(imageKey) {
-	        return _mlyCache.sequences.forImageKey[imageKey];
-	    },
+	      while (reUnicode.test(string)) {
+	        ++result;
+	      }
 
+	      return result;
+	    }
+	    /**
+	     * Converts a Unicode `string` to an array.
+	     *
+	     * @private
+	     * @param {string} string The string to convert.
+	     * @returns {Array} Returns the converted array.
+	     */
 
-	    // Updates the currently highlighted sequence and selected bubble.
-	    // Reset is only necessary when interacting with the viewport because
-	    // this implicitly changes the currently selected bubble/sequence
-	    setStyles: function(context, hovered, reset) {
-	        if (reset) {  // reset all layers
-	            context.container().selectAll('.viewfield-group')
-	                .classed('highlighted', false)
-	                .classed('hovered', false)
-	                .classed('currentView', false);
 
-	            context.container().selectAll('.sequence')
-	                .classed('highlighted', false)
-	                .classed('currentView', false);
-	        }
+	    function unicodeToArray(string) {
+	      return string.match(reUnicode) || [];
+	    }
+	    /**
+	     * Splits a Unicode `string` into an array of its words.
+	     *
+	     * @private
+	     * @param {string} The string to inspect.
+	     * @returns {Array} Returns the words of `string`.
+	     */
 
-	        var hoveredImageKey = hovered && hovered.key;
-	        var hoveredSequenceKey = hoveredImageKey && this.getSequenceKeyForImageKey(hoveredImageKey);
-	        var hoveredLineString = hoveredSequenceKey && _mlyCache.sequences.lineString[hoveredSequenceKey];
-	        var hoveredImageKeys = (hoveredLineString && hoveredLineString.properties.coordinateProperties.image_keys) || [];
 
-	        var selectedImageKey = _mlySelectedImageKey;
-	        var selectedSequenceKey = selectedImageKey && this.getSequenceKeyForImageKey(selectedImageKey);
-	        var selectedLineString = selectedSequenceKey && _mlyCache.sequences.lineString[selectedSequenceKey];
-	        var selectedImageKeys = (selectedLineString && selectedLineString.properties.coordinateProperties.image_keys) || [];
+	    function unicodeWords(string) {
+	      return string.match(reUnicodeWord) || [];
+	    }
+	    /*--------------------------------------------------------------------------*/
 
-	        // highlight sibling viewfields on either the selected or the hovered sequences
-	        var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
+	    /**
+	     * Create a new pristine `lodash` function using the `context` object.
+	     *
+	     * @static
+	     * @memberOf _
+	     * @since 1.1.0
+	     * @category Util
+	     * @param {Object} [context=root] The context object.
+	     * @returns {Function} Returns a new `lodash` function.
+	     * @example
+	     *
+	     * _.mixin({ 'foo': _.constant('foo') });
+	     *
+	     * var lodash = _.runInContext();
+	     * lodash.mixin({ 'bar': lodash.constant('bar') });
+	     *
+	     * _.isFunction(_.foo);
+	     * // => true
+	     * _.isFunction(_.bar);
+	     * // => false
+	     *
+	     * lodash.isFunction(lodash.foo);
+	     * // => false
+	     * lodash.isFunction(lodash.bar);
+	     * // => true
+	     *
+	     * // Create a suped-up `defer` in Node.js.
+	     * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
+	     */
 
-	        context.container().selectAll('.layer-mapillary .viewfield-group')
-	            .classed('highlighted', function(d) { return highlightedImageKeys.indexOf(d.key) !== -1; })
-	            .classed('hovered', function(d) { return d.key === hoveredImageKey; })
-	            .classed('currentView', function(d) { return d.key === selectedImageKey; });
 
-	        context.container().selectAll('.layer-mapillary .sequence')
-	            .classed('highlighted', function(d) { return d.properties.key === hoveredSequenceKey; })
-	            .classed('currentView', function(d) { return d.properties.key === selectedSequenceKey; });
+	    var runInContext = function runInContext(context) {
+	      context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));
+	      /** Built-in constructor references. */
 
-	        // update viewfields if needed
-	        context.container().selectAll('.viewfield-group .viewfield')
-	            .attr('d', viewfieldPath);
+	      var Array = context.Array,
+	          Date = context.Date,
+	          Error = context.Error,
+	          Function = context.Function,
+	          Math = context.Math,
+	          Object = context.Object,
+	          RegExp = context.RegExp,
+	          String = context.String,
+	          TypeError = context.TypeError;
+	      /** Used for built-in method references. */
 
-	        function viewfieldPath() {
-	            var d = this.parentNode.__data__;
-	            if (d.pano && d.key !== selectedImageKey) {
-	                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-	            } else {
-	                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-	            }
-	        }
+	      var arrayProto = Array.prototype,
+	          funcProto = Function.prototype,
+	          objectProto = Object.prototype;
+	      /** Used to detect overreaching core-js shims. */
 
-	        return this;
-	    },
+	      var coreJsData = context['__core-js_shared__'];
+	      /** Used to resolve the decompiled source of functions. */
 
+	      var funcToString = funcProto.toString;
+	      /** Used to check objects for own properties. */
 
-	    updateDetections: function(d) {
-	        if (!_mlyViewer || _mlyFallback) { return; }
+	      var hasOwnProperty = objectProto.hasOwnProperty;
+	      /** Used to generate unique IDs. */
 
-	        var imageKey = d && d.key;
-	        if (!imageKey) { return; }
+	      var idCounter = 0;
+	      /** Used to detect methods masquerading as native. */
 
-	        var detections = _mlyCache.image_detections.forImageKey[imageKey] || [];
-	        detections.forEach(function(data) {
-	            var tag = makeTag(data);
-	            if (tag) {
-	                var tagComponent = _mlyViewer.getComponent('tag');
-	                tagComponent.add([tag]);
-	            }
-	        });
+	      var maskSrcKey = function () {
+	        var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+	        return uid ? 'Symbol(src)_1.' + uid : '';
+	      }();
+	      /**
+	       * Used to resolve the
+	       * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+	       * of values.
+	       */
 
-	        function makeTag(data) {
-	            var valueParts = data.value.split('--');
-	            if (valueParts.length !== 3) { return; }
-
-	            var text = valueParts[1].replace(/-/g, ' ');
-	            var tag;
-
-	            // Currently only two shapes <Polygon|Point>
-	            if (data.shape.type === 'Polygon') {
-	                var polygonGeometry = new Mapillary
-	                    .TagComponent
-	                    .PolygonGeometry(data.shape.coordinates[0]);
-
-	                tag = new Mapillary.TagComponent.OutlineTag(
-	                    data.key,
-	                    polygonGeometry,
-	                    {
-	                        text: text,
-	                        textColor: 0xffff00,
-	                        lineColor: 0xffff00,
-	                        lineWidth: 2,
-	                        fillColor: 0xffff00,
-	                        fillOpacity: 0.3,
-	                    }
-	                );
 
-	            } else if (data.shape.type === 'Point') {
-	                var pointGeometry = new Mapillary
-	                    .TagComponent
-	                    .PointGeometry(data.shape.coordinates[0]);
-
-	                tag = new Mapillary.TagComponent.SpotTag(
-	                    data.key,
-	                    pointGeometry,
-	                    {
-	                        text: text,
-	                        color: 0xffff00,
-	                        textColor: 0xffff00
-	                    }
-	                );
-	            }
+	      var nativeObjectToString = objectProto.toString;
+	      /** Used to infer the `Object` constructor. */
 
-	            return tag;
-	        }
-	    },
+	      var objectCtorString = funcToString.call(Object);
+	      /** Used to restore the original `_` reference in `_.noConflict`. */
 
+	      var oldDash = root._;
+	      /** Used to detect if a method is native. */
 
-	    cache: function() {
-	        return _mlyCache;
-	    }
+	      var reIsNative = RegExp('^' + funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&').replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$');
+	      /** Built-in value references. */
 
-	};
+	      var Buffer = moduleExports ? context.Buffer : undefined$1,
+	          _Symbol = context.Symbol,
+	          Uint8Array = context.Uint8Array,
+	          allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined$1,
+	          getPrototype = overArg(Object.getPrototypeOf, Object),
+	          objectCreate = Object.create,
+	          propertyIsEnumerable = objectProto.propertyIsEnumerable,
+	          splice = arrayProto.splice,
+	          spreadableSymbol = _Symbol ? _Symbol.isConcatSpreadable : undefined$1,
+	          symIterator = _Symbol ? _Symbol.iterator : undefined$1,
+	          symToStringTag = _Symbol ? _Symbol.toStringTag : undefined$1;
 
-	function validationIssue(attrs) {
-	    this.type = attrs.type;                // required - name of rule that created the issue (e.g. 'missing_tag')
-	    this.subtype = attrs.subtype;          // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')
-	    this.severity = attrs.severity;        // required - 'warning' or 'error'
-	    this.message = attrs.message;          // required - function returning localized string
-	    this.reference = attrs.reference;      // optional - function(selection) to render reference information
-	    this.entityIds = attrs.entityIds;      // optional - array of IDs of entities involved in the issue
-	    this.loc = attrs.loc;                  // optional - [lon, lat] to zoom in on to see the issue
-	    this.data = attrs.data;                // optional - object containing extra data for the fixes
-	    this.dynamicFixes = attrs.dynamicFixes;// optional - function(context) returning fixes
-	    this.hash = attrs.hash;                // optional - string to further differentiate the issue
+	      var defineProperty = function () {
+	        try {
+	          var func = getNative(Object, 'defineProperty');
+	          func({}, '', {});
+	          return func;
+	        } catch (e) {}
+	      }();
+	      /** Mocked built-ins. */
+
+
+	      var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,
+	          ctxNow = Date && Date.now !== root.Date.now && Date.now,
+	          ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;
+	      /* Built-in method references for those with the same name as other `lodash` methods. */
+
+	      var nativeCeil = Math.ceil,
+	          nativeFloor = Math.floor,
+	          nativeGetSymbols = Object.getOwnPropertySymbols,
+	          nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined$1,
+	          nativeIsFinite = context.isFinite,
+	          nativeJoin = arrayProto.join,
+	          nativeKeys = overArg(Object.keys, Object),
+	          nativeMax = Math.max,
+	          nativeMin = Math.min,
+	          nativeNow = Date.now,
+	          nativeParseInt = context.parseInt,
+	          nativeRandom = Math.random,
+	          nativeReverse = arrayProto.reverse;
+	      /* Built-in method references that are verified to be native. */
+
+	      var DataView = getNative(context, 'DataView'),
+	          Map = getNative(context, 'Map'),
+	          Promise = getNative(context, 'Promise'),
+	          Set = getNative(context, 'Set'),
+	          WeakMap = getNative(context, 'WeakMap'),
+	          nativeCreate = getNative(Object, 'create');
+	      /** Used to store function metadata. */
+
+	      var metaMap = WeakMap && new WeakMap();
+	      /** Used to lookup unminified function names. */
+
+	      var realNames = {};
+	      /** Used to detect maps, sets, and weakmaps. */
+
+	      var dataViewCtorString = toSource(DataView),
+	          mapCtorString = toSource(Map),
+	          promiseCtorString = toSource(Promise),
+	          setCtorString = toSource(Set),
+	          weakMapCtorString = toSource(WeakMap);
+	      /** Used to convert symbols to primitives and strings. */
+
+	      var symbolProto = _Symbol ? _Symbol.prototype : undefined$1,
+	          symbolValueOf = symbolProto ? symbolProto.valueOf : undefined$1,
+	          symbolToString = symbolProto ? symbolProto.toString : undefined$1;
+	      /*------------------------------------------------------------------------*/
 
-	    this.id = generateID.apply(this);      // generated - see below
-	    this.autoFix = null;                   // generated - if autofix exists, will be set below
+	      /**
+	       * Creates a `lodash` object which wraps `value` to enable implicit method
+	       * chain sequences. Methods that operate on and return arrays, collections,
+	       * and functions can be chained together. Methods that retrieve a single value
+	       * or may return a primitive value will automatically end the chain sequence
+	       * and return the unwrapped value. Otherwise, the value must be unwrapped
+	       * with `_#value`.
+	       *
+	       * Explicit chain sequences, which must be unwrapped with `_#value`, may be
+	       * enabled using `_.chain`.
+	       *
+	       * The execution of chained methods is lazy, that is, it's deferred until
+	       * `_#value` is implicitly or explicitly called.
+	       *
+	       * Lazy evaluation allows several methods to support shortcut fusion.
+	       * Shortcut fusion is an optimization to merge iteratee calls; this avoids
+	       * the creation of intermediate arrays and can greatly reduce the number of
+	       * iteratee executions. Sections of a chain sequence qualify for shortcut
+	       * fusion if the section is applied to an array and iteratees accept only
+	       * one argument. The heuristic for whether a section qualifies for shortcut
+	       * fusion is subject to change.
+	       *
+	       * Chaining is supported in custom builds as long as the `_#value` method is
+	       * directly or indirectly included in the build.
+	       *
+	       * In addition to lodash methods, wrappers have `Array` and `String` methods.
+	       *
+	       * The wrapper `Array` methods are:
+	       * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
+	       *
+	       * The wrapper `String` methods are:
+	       * `replace` and `split`
+	       *
+	       * The wrapper methods that support shortcut fusion are:
+	       * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
+	       * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
+	       * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
+	       *
+	       * The chainable wrapper methods are:
+	       * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
+	       * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
+	       * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
+	       * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
+	       * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
+	       * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
+	       * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
+	       * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
+	       * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
+	       * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
+	       * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
+	       * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
+	       * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
+	       * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
+	       * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
+	       * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
+	       * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
+	       * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
+	       * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
+	       * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
+	       * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
+	       * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
+	       * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
+	       * `zipObject`, `zipObjectDeep`, and `zipWith`
+	       *
+	       * The wrapper methods that are **not** chainable by default are:
+	       * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
+	       * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
+	       * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
+	       * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
+	       * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
+	       * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
+	       * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
+	       * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
+	       * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
+	       * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
+	       * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
+	       * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
+	       * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
+	       * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
+	       * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
+	       * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
+	       * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
+	       * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
+	       * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
+	       * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
+	       * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
+	       * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
+	       * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
+	       * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
+	       * `upperFirst`, `value`, and `words`
+	       *
+	       * @name _
+	       * @constructor
+	       * @category Seq
+	       * @param {*} value The value to wrap in a `lodash` instance.
+	       * @returns {Object} Returns the new `lodash` wrapper instance.
+	       * @example
+	       *
+	       * function square(n) {
+	       *   return n * n;
+	       * }
+	       *
+	       * var wrapped = _([1, 2, 3]);
+	       *
+	       * // Returns an unwrapped value.
+	       * wrapped.reduce(_.add);
+	       * // => 6
+	       *
+	       * // Returns a wrapped value.
+	       * var squares = wrapped.map(square);
+	       *
+	       * _.isArray(squares);
+	       * // => false
+	       *
+	       * _.isArray(squares.value());
+	       * // => true
+	       */
 
-	    // A unique, deterministic string hash.
-	    // Issues with identical id values are considered identical.
-	    function generateID() {
-	        var parts = [this.type];
+	      function lodash(value) {
+	        if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
+	          if (value instanceof LodashWrapper) {
+	            return value;
+	          }
 
-	        if (this.hash) {   // subclasses can pass in their own differentiator
-	            parts.push(this.hash);
+	          if (hasOwnProperty.call(value, '__wrapped__')) {
+	            return wrapperClone(value);
+	          }
 	        }
 
-	        if (this.subtype) {
-	            parts.push(this.subtype);
-	        }
+	        return new LodashWrapper(value);
+	      }
+	      /**
+	       * The base implementation of `_.create` without support for assigning
+	       * properties to the created object.
+	       *
+	       * @private
+	       * @param {Object} proto The object to inherit from.
+	       * @returns {Object} Returns the new object.
+	       */
 
-	        // include the entities this issue is for
-	        // (sort them so the id is deterministic)
-	        if (this.entityIds) {
-	            var entityKeys = this.entityIds.slice().sort();
-	            parts.push.apply(parts, entityKeys);
-	        }
 
-	        return parts.join(':');
-	    }
+	      var baseCreate = function () {
+	        function object() {}
 
-	    this.extent = function(resolver) {
-	        if (this.loc) {
-	            return geoExtent(this.loc);
-	        }
-	        if (this.entityIds && this.entityIds.length) {
-	            return this.entityIds.reduce(function(extent, entityId) {
-	                return extent.extend(resolver.entity(entityId).extent(resolver));
-	            }, geoExtent());
-	        }
-	        return null;
-	    };
+	        return function (proto) {
+	          if (!isObject(proto)) {
+	            return {};
+	          }
 
-	    this.fixes = function(context) {
-	        var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
-	        var issue = this;
+	          if (objectCreate) {
+	            return objectCreate(proto);
+	          }
 
-	        if (issue.severity === 'warning') {
-	            // allow ignoring any issue that's not an error
-	            fixes.push(new validationIssueFix({
-	                title: _t('issues.fix.ignore_issue.title'),
-	                icon: 'iD-icon-close',
-	                onClick: function() {
-	                    context.validator().ignoreIssue(this.issue.id);
-	                }
-	            }));
-	        }
+	          object.prototype = proto;
+	          var result = new object();
+	          object.prototype = undefined$1;
+	          return result;
+	        };
+	      }();
+	      /**
+	       * The function whose prototype chain sequence wrappers inherit from.
+	       *
+	       * @private
+	       */
 
-	        fixes.forEach(function(fix) {
-	            fix.id = fix.title;
-	            // add a reference to the issue for use in actions
-	            fix.issue = issue;
-	            if (fix.autoArgs) {
-	                issue.autoFix = fix;
-	            }
-	        });
-	        return fixes;
-	    };
 
-	}
+	      function baseLodash() {// No operation performed.
+	      }
+	      /**
+	       * The base constructor for creating `lodash` wrapper objects.
+	       *
+	       * @private
+	       * @param {*} value The value to wrap.
+	       * @param {boolean} [chainAll] Enable explicit method chain sequences.
+	       */
 
 
-	function validationIssueFix(attrs) {
-	    this.title = attrs.title;                   // Required
-	    this.onClick = attrs.onClick;               // Optional - the function to run to apply the fix
-	    this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any
-	    this.icon = attrs.icon;                     // Optional - shows 'iD-icon-wrench' if not set
-	    this.entityIds = attrs.entityIds || [];     // Optional - used for hover-higlighting.
-	    this.autoArgs = attrs.autoArgs;             // Optional - pass [actions, annotation] arglist if this fix can automatically run
+	      function LodashWrapper(value, chainAll) {
+	        this.__wrapped__ = value;
+	        this.__actions__ = [];
+	        this.__chain__ = !!chainAll;
+	        this.__index__ = 0;
+	        this.__values__ = undefined$1;
+	      }
+	      /**
+	       * By default, the template delimiters used by lodash are like those in
+	       * embedded Ruby (ERB) as well as ES2015 template strings. Change the
+	       * following template settings to use alternative delimiters.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @type {Object}
+	       */
 
-	    this.issue = null;    // Generated link - added by validationIssue
-	}
 
-	var buildRuleChecks = function() {
-	    return {
-	        equals: function (equals) {
-	            return function(tags) {
-	                return Object.keys(equals).every(function(k) {
-	                    return equals[k] === tags[k];
-	                });
-	            };
-	        },
-	        notEquals: function (notEquals) {
-	            return function(tags) {
-	                return Object.keys(notEquals).some(function(k) {
-	                    return notEquals[k] !== tags[k];
-	                });
-	            };
-	        },
-	        absence: function(absence) {
-	            return function(tags) {
-	                return Object.keys(tags).indexOf(absence) === -1;
-	            };
-	        },
-	        presence: function(presence) {
-	            return function(tags) {
-	                return Object.keys(tags).indexOf(presence) > -1;
-	            };
-	        },
-	        greaterThan: function(greaterThan) {
-	            var key = Object.keys(greaterThan)[0];
-	            var value = greaterThan[key];
+	      lodash.templateSettings = {
+	        /**
+	         * Used to detect `data` property values to be HTML-escaped.
+	         *
+	         * @memberOf _.templateSettings
+	         * @type {RegExp}
+	         */
+	        'escape': reEscape,
+
+	        /**
+	         * Used to detect code to be evaluated.
+	         *
+	         * @memberOf _.templateSettings
+	         * @type {RegExp}
+	         */
+	        'evaluate': reEvaluate,
+
+	        /**
+	         * Used to detect `data` property values to inject.
+	         *
+	         * @memberOf _.templateSettings
+	         * @type {RegExp}
+	         */
+	        'interpolate': reInterpolate,
+
+	        /**
+	         * Used to reference the data object in the template text.
+	         *
+	         * @memberOf _.templateSettings
+	         * @type {string}
+	         */
+	        'variable': '',
+
+	        /**
+	         * Used to import variables into the compiled template.
+	         *
+	         * @memberOf _.templateSettings
+	         * @type {Object}
+	         */
+	        'imports': {
+	          /**
+	           * A reference to the `lodash` function.
+	           *
+	           * @memberOf _.templateSettings.imports
+	           * @type {Function}
+	           */
+	          '_': lodash
+	        }
+	      }; // Ensure wrappers are instances of `baseLodash`.
+
+	      lodash.prototype = baseLodash.prototype;
+	      lodash.prototype.constructor = lodash;
+	      LodashWrapper.prototype = baseCreate(baseLodash.prototype);
+	      LodashWrapper.prototype.constructor = LodashWrapper;
+	      /*------------------------------------------------------------------------*/
 
-	            return function(tags) {
-	                return tags[key] > value;
-	            };
-	        },
-	        greaterThanEqual: function(greaterThanEqual) {
-	            var key = Object.keys(greaterThanEqual)[0];
-	            var value = greaterThanEqual[key];
+	      /**
+	       * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
+	       *
+	       * @private
+	       * @constructor
+	       * @param {*} value The value to wrap.
+	       */
 
-	            return function(tags) {
-	                return tags[key] >= value;
-	            };
-	        },
-	        lessThan: function(lessThan) {
-	            var key = Object.keys(lessThan)[0];
-	            var value = lessThan[key];
+	      function LazyWrapper(value) {
+	        this.__wrapped__ = value;
+	        this.__actions__ = [];
+	        this.__dir__ = 1;
+	        this.__filtered__ = false;
+	        this.__iteratees__ = [];
+	        this.__takeCount__ = MAX_ARRAY_LENGTH;
+	        this.__views__ = [];
+	      }
+	      /**
+	       * Creates a clone of the lazy wrapper object.
+	       *
+	       * @private
+	       * @name clone
+	       * @memberOf LazyWrapper
+	       * @returns {Object} Returns the cloned `LazyWrapper` object.
+	       */
 
-	            return function(tags) {
-	                return tags[key] < value;
-	            };
-	        },
-	        lessThanEqual: function(lessThanEqual) {
-	            var key = Object.keys(lessThanEqual)[0];
-	            var value = lessThanEqual[key];
 
-	            return function(tags) {
-	                return tags[key] <= value;
-	            };
-	        },
-	        positiveRegex: function(positiveRegex) {
-	            var tagKey = Object.keys(positiveRegex)[0];
-	            var expression = positiveRegex[tagKey].join('|');
-	            var regex = new RegExp(expression);
+	      function lazyClone() {
+	        var result = new LazyWrapper(this.__wrapped__);
+	        result.__actions__ = copyArray(this.__actions__);
+	        result.__dir__ = this.__dir__;
+	        result.__filtered__ = this.__filtered__;
+	        result.__iteratees__ = copyArray(this.__iteratees__);
+	        result.__takeCount__ = this.__takeCount__;
+	        result.__views__ = copyArray(this.__views__);
+	        return result;
+	      }
+	      /**
+	       * Reverses the direction of lazy iteration.
+	       *
+	       * @private
+	       * @name reverse
+	       * @memberOf LazyWrapper
+	       * @returns {Object} Returns the new reversed `LazyWrapper` object.
+	       */
 
-	            return function(tags) {
-	                return regex.test(tags[tagKey]);
-	            };
-	        },
-	        negativeRegex: function(negativeRegex) {
-	            var tagKey = Object.keys(negativeRegex)[0];
-	            var expression = negativeRegex[tagKey].join('|');
-	            var regex = new RegExp(expression);
 
-	            return function(tags) {
-	                return !regex.test(tags[tagKey]);
-	            };
+	      function lazyReverse() {
+	        if (this.__filtered__) {
+	          var result = new LazyWrapper(this);
+	          result.__dir__ = -1;
+	          result.__filtered__ = true;
+	        } else {
+	          result = this.clone();
+	          result.__dir__ *= -1;
 	        }
-	    };
-	};
 
-	var buildLineKeys = function() {
-	    return {
-	        highway: {
-	            rest_area: true,
-	            services: true
-	        },
-	        railway: {
-	            roundhouse: true,
-	            station: true,
-	            traverser: true,
-	            turntable: true,
-	            wash: true
+	        return result;
+	      }
+	      /**
+	       * Extracts the unwrapped value from its lazy wrapper.
+	       *
+	       * @private
+	       * @name value
+	       * @memberOf LazyWrapper
+	       * @returns {*} Returns the unwrapped value.
+	       */
+
+
+	      function lazyValue() {
+	        var array = this.__wrapped__.value(),
+	            dir = this.__dir__,
+	            isArr = isArray(array),
+	            isRight = dir < 0,
+	            arrLength = isArr ? array.length : 0,
+	            view = getView(0, arrLength, this.__views__),
+	            start = view.start,
+	            end = view.end,
+	            length = end - start,
+	            index = isRight ? end : start - 1,
+	            iteratees = this.__iteratees__,
+	            iterLength = iteratees.length,
+	            resIndex = 0,
+	            takeCount = nativeMin(length, this.__takeCount__);
+
+	        if (!isArr || !isRight && arrLength == length && takeCount == length) {
+	          return baseWrapperValue(array, this.__actions__);
 	        }
-	    };
-	};
 
-	var serviceMapRules = {
-	    init: function() {
-	        this._ruleChecks  = buildRuleChecks();
-	        this._validationRules = [];
-	        this._areaKeys = osmAreaKeys;
-	        this._lineKeys = buildLineKeys();
-	    },
+	        var result = [];
 
-	    // list of rules only relevant to tag checks...
-	    filterRuleChecks: function(selector) {
-	        var _ruleChecks = this._ruleChecks;
-	        return Object.keys(selector).reduce(function(rules, key) {
-	            if (['geometry', 'error', 'warning'].indexOf(key) === -1) {
-	                rules.push(_ruleChecks[key](selector[key]));
+	        outer: while (length-- && resIndex < takeCount) {
+	          index += dir;
+	          var iterIndex = -1,
+	              value = array[index];
+
+	          while (++iterIndex < iterLength) {
+	            var data = iteratees[iterIndex],
+	                iteratee = data.iteratee,
+	                type = data.type,
+	                computed = iteratee(value);
+
+	            if (type == LAZY_MAP_FLAG) {
+	              value = computed;
+	            } else if (!computed) {
+	              if (type == LAZY_FILTER_FLAG) {
+	                continue outer;
+	              } else {
+	                break outer;
+	              }
 	            }
-	            return rules;
-	        }, []);
-	    },
-
-	    // builds tagMap from mapcss-parse selector object...
-	    buildTagMap: function(selector) {
-	        var getRegexValues = function(regexes) {
-	            return regexes.map(function(regex) {
-	                return regex.replace(/\$|\^/g, '');
-	            });
-	        };
+	          }
 
-	        var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
-	            var values;
-	            var isRegex = /regex/gi.test(key);
-	            var isEqual = /equals/gi.test(key);
+	          result[resIndex++] = value;
+	        }
 
-	            if (isRegex || isEqual) {
-	                Object.keys(selector[key]).forEach(function(selectorKey) {
-	                    values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
+	        return result;
+	      } // Ensure `LazyWrapper` is an instance of `baseLodash`.
 
-	                    if (expectedTags.hasOwnProperty(selectorKey)) {
-	                        values = values.concat(expectedTags[selectorKey]);
-	                    }
 
-	                    expectedTags[selectorKey] = values;
-	                });
+	      LazyWrapper.prototype = baseCreate(baseLodash.prototype);
+	      LazyWrapper.prototype.constructor = LazyWrapper;
+	      /*------------------------------------------------------------------------*/
 
-	            } else if (/(greater|less)Than(Equal)?|presence/g.test(key)) {
-	                var tagKey = /presence/.test(key) ? selector[key] : Object.keys(selector[key])[0];
+	      /**
+	       * Creates a hash object.
+	       *
+	       * @private
+	       * @constructor
+	       * @param {Array} [entries] The key-value pairs to cache.
+	       */
 
-	                values = [selector[key][tagKey]];
+	      function Hash(entries) {
+	        var index = -1,
+	            length = entries == null ? 0 : entries.length;
+	        this.clear();
 
-	                if (expectedTags.hasOwnProperty(tagKey)) {
-	                    values = values.concat(expectedTags[tagKey]);
-	                }
+	        while (++index < length) {
+	          var entry = entries[index];
+	          this.set(entry[0], entry[1]);
+	        }
+	      }
+	      /**
+	       * Removes all key-value entries from the hash.
+	       *
+	       * @private
+	       * @name clear
+	       * @memberOf Hash
+	       */
 
-	                expectedTags[tagKey] = values;
-	            }
 
-	            return expectedTags;
-	        }, {});
+	      function hashClear() {
+	        this.__data__ = nativeCreate ? nativeCreate(null) : {};
+	        this.size = 0;
+	      }
+	      /**
+	       * Removes `key` and its value from the hash.
+	       *
+	       * @private
+	       * @name delete
+	       * @memberOf Hash
+	       * @param {Object} hash The hash to modify.
+	       * @param {string} key The key of the value to remove.
+	       * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+	       */
 
-	        return tagMap;
-	    },
 
-	    // inspired by osmWay#isArea()
-	    inferGeometry: function(tagMap) {
-	        var _lineKeys = this._lineKeys;
-	        var _areaKeys = this._areaKeys;
+	      function hashDelete(key) {
+	        var result = this.has(key) && delete this.__data__[key];
+	        this.size -= result ? 1 : 0;
+	        return result;
+	      }
+	      /**
+	       * Gets the hash value for `key`.
+	       *
+	       * @private
+	       * @name get
+	       * @memberOf Hash
+	       * @param {string} key The key of the value to get.
+	       * @returns {*} Returns the entry value.
+	       */
 
-	        var keyValueDoesNotImplyArea = function(key) {
-	            return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
-	        };
-	        var keyValueImpliesLine = function(key) {
-	            return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
-	        };
 
-	        if (tagMap.hasOwnProperty('area')) {
-	            if (tagMap.area.indexOf('yes') > -1) {
-	                return 'area';
-	            }
-	            if (tagMap.area.indexOf('no') > -1) {
-	                return 'line';
-	            }
-	        }
+	      function hashGet(key) {
+	        var data = this.__data__;
 
-	        for (var key in tagMap) {
-	            if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
-	                return 'area';
-	            }
-	            if (key in _lineKeys && keyValueImpliesLine(key)) {
-	                return 'area';
-	            }
+	        if (nativeCreate) {
+	          var result = data[key];
+	          return result === HASH_UNDEFINED ? undefined$1 : result;
 	        }
 
-	        return 'line';
-	    },
+	        return hasOwnProperty.call(data, key) ? data[key] : undefined$1;
+	      }
+	      /**
+	       * Checks if a hash value for `key` exists.
+	       *
+	       * @private
+	       * @name has
+	       * @memberOf Hash
+	       * @param {string} key The key of the entry to check.
+	       * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+	       */
 
-	    // adds from mapcss-parse selector check...
-	    addRule: function(selector) {
-	        var rule = {
-	            // checks relevant to mapcss-selector
-	            checks: this.filterRuleChecks(selector),
-	            // true if all conditions for a tag error are true..
-	            matches: function(entity) {
-	                return this.checks.every(function(check) {
-	                    return check(entity.tags);
-	                });
-	            },
-	            // borrowed from Way#isArea()
-	            inferredGeometry: this.inferGeometry(this.buildTagMap(selector), this._areaKeys),
-	            geometryMatches: function(entity, graph) {
-	                if (entity.type === 'node' || entity.type === 'relation') {
-	                    return selector.geometry === entity.type;
-	                } else if (entity.type === 'way') {
-	                    return this.inferredGeometry === entity.geometry(graph);
-	                }
-	            },
-	            // when geometries match and tag matches are present, return a warning...
-	            findIssues: function (entity, graph, issues) {
-	                if (this.geometryMatches(entity, graph) && this.matches(entity)) {
-	                    var severity = Object.keys(selector).indexOf('error') > -1
-	                            ? 'error'
-	                            : 'warning';
-	                    var message = selector[severity];
-	                    issues.push(new validationIssue({
-	                        type: 'maprules',
-	                        severity: severity,
-	                        message: function() {
-	                            return message;
-	                        },
-	                        entityIds: [entity.id]
-	                    }));
-	                }
-	            }
-	        };
-	        this._validationRules.push(rule);
-	    },
 
-	    clearRules: function() { this._validationRules = []; },
+	      function hashHas(key) {
+	        var data = this.__data__;
+	        return nativeCreate ? data[key] !== undefined$1 : hasOwnProperty.call(data, key);
+	      }
+	      /**
+	       * Sets the hash `key` to `value`.
+	       *
+	       * @private
+	       * @name set
+	       * @memberOf Hash
+	       * @param {string} key The key of the value to set.
+	       * @param {*} value The value to set.
+	       * @returns {Object} Returns the hash instance.
+	       */
 
-	    // returns validationRules...
-	    validationRules: function() { return this._validationRules; },
 
-	    // returns ruleChecks
-	    ruleChecks: function() { return this._ruleChecks; }
-	};
+	      function hashSet(key, value) {
+	        var data = this.__data__;
+	        this.size += this.has(key) ? 0 : 1;
+	        data[key] = nativeCreate && value === undefined$1 ? HASH_UNDEFINED : value;
+	        return this;
+	      } // Add methods to `Hash`.
 
-	var apibase$1 = 'https://nominatim.openstreetmap.org/';
-	var _inflight = {};
-	var _nominatimCache;
 
+	      Hash.prototype.clear = hashClear;
+	      Hash.prototype['delete'] = hashDelete;
+	      Hash.prototype.get = hashGet;
+	      Hash.prototype.has = hashHas;
+	      Hash.prototype.set = hashSet;
+	      /*------------------------------------------------------------------------*/
 
-	var serviceNominatim = {
+	      /**
+	       * Creates an list cache object.
+	       *
+	       * @private
+	       * @constructor
+	       * @param {Array} [entries] The key-value pairs to cache.
+	       */
 
-	    init: function() {
-	        _inflight = {};
-	        _nominatimCache = new RBush();
-	    },
+	      function ListCache(entries) {
+	        var index = -1,
+	            length = entries == null ? 0 : entries.length;
+	        this.clear();
 
-	    reset: function() {
-	        Object.values(_inflight).forEach(function(controller) { controller.abort(); });
-	        _inflight = {};
-	        _nominatimCache = new RBush();
-	    },
+	        while (++index < length) {
+	          var entry = entries[index];
+	          this.set(entry[0], entry[1]);
+	        }
+	      }
+	      /**
+	       * Removes all key-value entries from the list cache.
+	       *
+	       * @private
+	       * @name clear
+	       * @memberOf ListCache
+	       */
 
 
-	    countryCode: function (location, callback) {
-	        this.reverse(location, function(err, result) {
-	            if (err) {
-	                return callback(err);
-	            } else if (result.address) {
-	                return callback(null, result.address.country_code);
-	            } else {
-	                return callback('Unable to geocode', null);
-	            }
-	        });
-	    },
+	      function listCacheClear() {
+	        this.__data__ = [];
+	        this.size = 0;
+	      }
+	      /**
+	       * Removes `key` and its value from the list cache.
+	       *
+	       * @private
+	       * @name delete
+	       * @memberOf ListCache
+	       * @param {string} key The key of the value to remove.
+	       * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+	       */
 
 
-	    reverse: function (loc, callback) {
-	        var cached = _nominatimCache.search(
-	            { minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1] }
-	        );
+	      function listCacheDelete(key) {
+	        var data = this.__data__,
+	            index = assocIndexOf(data, key);
 
-	        if (cached.length > 0) {
-	            if (callback) { callback(null, cached[0].data); }
-	            return;
+	        if (index < 0) {
+	          return false;
 	        }
 
-	        var params = { zoom: 13, format: 'json', addressdetails: 1, lat: loc[1], lon: loc[0] };
-	        var url = apibase$1 + 'reverse?' + utilQsString(params);
+	        var lastIndex = data.length - 1;
 
-	        if (_inflight[url]) { return; }
-	        var controller = new AbortController();
-	        _inflight[url] = controller;
+	        if (index == lastIndex) {
+	          data.pop();
+	        } else {
+	          splice.call(data, index, 1);
+	        }
 
-	        d3_json(url, { signal: controller.signal })
-	            .then(function(result) {
-	                delete _inflight[url];
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                }
-	                var extent = geoExtent(loc).padByMeters(200);
-	                _nominatimCache.insert(Object.assign(extent.bbox(), {data: result}));
-	                if (callback) { callback(null, result); }
-	            })
-	            .catch(function(err) {
-	                delete _inflight[url];
-	                if (err.name === 'AbortError') { return; }
-	                if (callback) { callback(err.message); }
-	            });
-	    },
+	        --this.size;
+	        return true;
+	      }
+	      /**
+	       * Gets the list cache value for `key`.
+	       *
+	       * @private
+	       * @name get
+	       * @memberOf ListCache
+	       * @param {string} key The key of the value to get.
+	       * @returns {*} Returns the entry value.
+	       */
 
 
-	    search: function (val, callback) {
-	        var searchVal = encodeURIComponent(val);
-	        var url = apibase$1 + 'search/' + searchVal + '?limit=10&format=json';
+	      function listCacheGet(key) {
+	        var data = this.__data__,
+	            index = assocIndexOf(data, key);
+	        return index < 0 ? undefined$1 : data[index][1];
+	      }
+	      /**
+	       * Checks if a list cache value for `key` exists.
+	       *
+	       * @private
+	       * @name has
+	       * @memberOf ListCache
+	       * @param {string} key The key of the entry to check.
+	       * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+	       */
 
-	        if (_inflight[url]) { return; }
-	        var controller = new AbortController();
-	        _inflight[url] = controller;
 
-	        d3_json(url, { signal: controller.signal })
-	            .then(function(result) {
-	                delete _inflight[url];
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                }
-	                if (callback) { callback(null, result); }
-	            })
-	            .catch(function(err) {
-	                delete _inflight[url];
-	                if (err.name === 'AbortError') { return; }
-	                if (callback) { callback(err.message); }
-	            });
-	    }
+	      function listCacheHas(key) {
+	        return assocIndexOf(this.__data__, key) > -1;
+	      }
+	      /**
+	       * Sets the list cache `key` to `value`.
+	       *
+	       * @private
+	       * @name set
+	       * @memberOf ListCache
+	       * @param {string} key The key of the value to set.
+	       * @param {*} value The value to set.
+	       * @returns {Object} Returns the list cache instance.
+	       */
 
-	};
 
-	var apibase$2 = 'https://openstreetcam.org';
-	var maxResults$1 = 1000;
-	var tileZoom$1 = 14;
-	var tiler$4 = utilTiler().zoomExtent([tileZoom$1, tileZoom$1]).skipNullIsland(true);
-	var dispatch$5 = dispatch('loadedImages');
-	var imgZoom = d3_zoom()
-	    .extent([[0, 0], [320, 240]])
-	    .translateExtent([[0, 0], [320, 240]])
-	    .scaleExtent([1, 15]);
-	var _oscCache;
-	var _oscSelectedImage;
+	      function listCacheSet(key, value) {
+	        var data = this.__data__,
+	            index = assocIndexOf(data, key);
 
+	        if (index < 0) {
+	          ++this.size;
+	          data.push([key, value]);
+	        } else {
+	          data[index][1] = value;
+	        }
 
-	function abortRequest$4(controller) {
-	    controller.abort();
-	}
+	        return this;
+	      } // Add methods to `ListCache`.
 
 
-	function maxPageAtZoom$1(z) {
-	    if (z < 15)   { return 2; }
-	    if (z === 15) { return 5; }
-	    if (z === 16) { return 10; }
-	    if (z === 17) { return 20; }
-	    if (z === 18) { return 40; }
-	    if (z > 18)   { return 80; }
-	}
+	      ListCache.prototype.clear = listCacheClear;
+	      ListCache.prototype['delete'] = listCacheDelete;
+	      ListCache.prototype.get = listCacheGet;
+	      ListCache.prototype.has = listCacheHas;
+	      ListCache.prototype.set = listCacheSet;
+	      /*------------------------------------------------------------------------*/
 
+	      /**
+	       * Creates a map cache object to store key-value pairs.
+	       *
+	       * @private
+	       * @constructor
+	       * @param {Array} [entries] The key-value pairs to cache.
+	       */
 
-	function loadTiles$1(which, url, projection) {
-	    var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
-	    var tiles = tiler$4.getTiles(projection);
+	      function MapCache(entries) {
+	        var index = -1,
+	            length = entries == null ? 0 : entries.length;
+	        this.clear();
 
-	    // abort inflight requests that are no longer needed
-	    var cache = _oscCache[which];
-	    Object.keys(cache.inflight).forEach(function(k) {
-	        var wanted = tiles.find(function(tile) { return k.indexOf(tile.id + ',') === 0; });
-	        if (!wanted) {
-	            abortRequest$4(cache.inflight[k]);
-	            delete cache.inflight[k];
+	        while (++index < length) {
+	          var entry = entries[index];
+	          this.set(entry[0], entry[1]);
 	        }
-	    });
-
-	    tiles.forEach(function(tile) {
-	        loadNextTilePage$1(which, currZoom, url, tile);
-	    });
-	}
+	      }
+	      /**
+	       * Removes all key-value entries from the map.
+	       *
+	       * @private
+	       * @name clear
+	       * @memberOf MapCache
+	       */
 
 
-	function loadNextTilePage$1(which, currZoom, url, tile) {
-	    var cache = _oscCache[which];
-	    var bbox = tile.extent.bbox();
-	    var maxPages = maxPageAtZoom$1(currZoom);
-	    var nextPage = cache.nextPage[tile.id] || 1;
-	    var params = utilQsString({
-	        ipp: maxResults$1,
-	        page: nextPage,
-	        // client_id: clientId,
-	        bbTopLeft: [bbox.maxY, bbox.minX].join(','),
-	        bbBottomRight: [bbox.minY, bbox.maxX].join(',')
-	    }, true);
+	      function mapCacheClear() {
+	        this.size = 0;
+	        this.__data__ = {
+	          'hash': new Hash(),
+	          'map': new (Map || ListCache)(),
+	          'string': new Hash()
+	        };
+	      }
+	      /**
+	       * Removes `key` and its value from the map.
+	       *
+	       * @private
+	       * @name delete
+	       * @memberOf MapCache
+	       * @param {string} key The key of the value to remove.
+	       * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+	       */
 
-	    if (nextPage > maxPages) { return; }
 
-	    var id = tile.id + ',' + String(nextPage);
-	    if (cache.loaded[id] || cache.inflight[id]) { return; }
+	      function mapCacheDelete(key) {
+	        var result = getMapData(this, key)['delete'](key);
+	        this.size -= result ? 1 : 0;
+	        return result;
+	      }
+	      /**
+	       * Gets the map value for `key`.
+	       *
+	       * @private
+	       * @name get
+	       * @memberOf MapCache
+	       * @param {string} key The key of the value to get.
+	       * @returns {*} Returns the entry value.
+	       */
 
-	    var controller = new AbortController();
-	    cache.inflight[id] = controller;
 
-	    var options = {
-	        method: 'POST',
-	        signal: controller.signal,
-	        body: params,
-	        headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
-	    };
+	      function mapCacheGet(key) {
+	        return getMapData(this, key).get(key);
+	      }
+	      /**
+	       * Checks if a map value for `key` exists.
+	       *
+	       * @private
+	       * @name has
+	       * @memberOf MapCache
+	       * @param {string} key The key of the entry to check.
+	       * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+	       */
 
-	    d3_json(url, options)
-	        .then(function(data) {
-	            cache.loaded[id] = true;
-	            delete cache.inflight[id];
-	            if (!data || !data.currentPageItems || !data.currentPageItems.length) {
-	                throw new Error('No Data');
-	            }
 
-	            var features = data.currentPageItems.map(function(item) {
-	                var loc = [+item.lng, +item.lat];
-	                var d;
-
-	                if (which === 'images') {
-	                    d = {
-	                        loc: loc,
-	                        key: item.id,
-	                        ca: +item.heading,
-	                        captured_at: (item.shot_date || item.date_added),
-	                        captured_by: item.username,
-	                        imagePath: item.lth_name,
-	                        sequence_id: item.sequence_id,
-	                        sequence_index: +item.sequence_index
-	                    };
-
-	                    // cache sequence info
-	                    var seq = _oscCache.sequences[d.sequence_id];
-	                    if (!seq) {
-	                        seq = { rotation: 0, images: [] };
-	                        _oscCache.sequences[d.sequence_id] = seq;
-	                    }
-	                    seq.images[d.sequence_index] = d;
-	                }
+	      function mapCacheHas(key) {
+	        return getMapData(this, key).has(key);
+	      }
+	      /**
+	       * Sets the map `key` to `value`.
+	       *
+	       * @private
+	       * @name set
+	       * @memberOf MapCache
+	       * @param {string} key The key of the value to set.
+	       * @param {*} value The value to set.
+	       * @returns {Object} Returns the map cache instance.
+	       */
 
-	                return {
-	                    minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1], data: d
-	                };
-	            });
 
-	            cache.rtree.load(features);
+	      function mapCacheSet(key, value) {
+	        var data = getMapData(this, key),
+	            size = data.size;
+	        data.set(key, value);
+	        this.size += data.size == size ? 0 : 1;
+	        return this;
+	      } // Add methods to `MapCache`.
 
-	            if (data.currentPageItems.length === maxResults$1) {  // more pages to load
-	                cache.nextPage[tile.id] = nextPage + 1;
-	                loadNextTilePage$1(which, currZoom, url, tile);
-	            } else {
-	                cache.nextPage[tile.id] = Infinity;     // no more pages to load
-	            }
 
-	            if (which === 'images') {
-	                dispatch$5.call('loadedImages');
-	            }
-	        })
-	        .catch(function() {
-	            cache.loaded[id] = true;
-	            delete cache.inflight[id];
-	        });
-	}
+	      MapCache.prototype.clear = mapCacheClear;
+	      MapCache.prototype['delete'] = mapCacheDelete;
+	      MapCache.prototype.get = mapCacheGet;
+	      MapCache.prototype.has = mapCacheHas;
+	      MapCache.prototype.set = mapCacheSet;
+	      /*------------------------------------------------------------------------*/
 
+	      /**
+	       *
+	       * Creates an array cache object to store unique values.
+	       *
+	       * @private
+	       * @constructor
+	       * @param {Array} [values] The values to cache.
+	       */
 
-	// partition viewport into higher zoom tiles
-	function partitionViewport$1(projection) {
-	    var z = geoScaleToZoom(projection.scale());
-	    var z2 = (Math.ceil(z * 2) / 2) + 2.5;   // round to next 0.5 and add 2.5
-	    var tiler = utilTiler().zoomExtent([z2, z2]);
+	      function SetCache(values) {
+	        var index = -1,
+	            length = values == null ? 0 : values.length;
+	        this.__data__ = new MapCache();
 
-	    return tiler.getTiles(projection)
-	        .map(function(tile) { return tile.extent; });
-	}
+	        while (++index < length) {
+	          this.add(values[index]);
+	        }
+	      }
+	      /**
+	       * Adds `value` to the array cache.
+	       *
+	       * @private
+	       * @name add
+	       * @memberOf SetCache
+	       * @alias push
+	       * @param {*} value The value to cache.
+	       * @returns {Object} Returns the cache instance.
+	       */
 
 
-	// no more than `limit` results per partition.
-	function searchLimited$1(limit, projection, rtree) {
-	    limit = limit || 5;
+	      function setCacheAdd(value) {
+	        this.__data__.set(value, HASH_UNDEFINED);
 
-	    return partitionViewport$1(projection)
-	        .reduce(function(result, extent) {
-	            var found = rtree.search(extent.bbox())
-	                .slice(0, limit)
-	                .map(function(d) { return d.data; });
+	        return this;
+	      }
+	      /**
+	       * Checks if `value` is in the array cache.
+	       *
+	       * @private
+	       * @name has
+	       * @memberOf SetCache
+	       * @param {*} value The value to search for.
+	       * @returns {number} Returns `true` if `value` is found, else `false`.
+	       */
 
-	            return (found.length ? result.concat(found) : result);
-	        }, []);
-	}
 
+	      function setCacheHas(value) {
+	        return this.__data__.has(value);
+	      } // Add methods to `SetCache`.
 
-	var serviceOpenstreetcam = {
 
-	    init: function() {
-	        if (!_oscCache) {
-	            this.reset();
-	        }
+	      SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+	      SetCache.prototype.has = setCacheHas;
+	      /*------------------------------------------------------------------------*/
 
-	        this.event = utilRebind(this, dispatch$5, 'on');
-	    },
+	      /**
+	       * Creates a stack cache object to store key-value pairs.
+	       *
+	       * @private
+	       * @constructor
+	       * @param {Array} [entries] The key-value pairs to cache.
+	       */
 
-	    reset: function() {
-	        if (_oscCache) {
-	            Object.values(_oscCache.images.inflight).forEach(abortRequest$4);
-	        }
+	      function Stack(entries) {
+	        var data = this.__data__ = new ListCache(entries);
+	        this.size = data.size;
+	      }
+	      /**
+	       * Removes all key-value entries from the stack.
+	       *
+	       * @private
+	       * @name clear
+	       * @memberOf Stack
+	       */
 
-	        _oscCache = {
-	            images: { inflight: {}, loaded: {}, nextPage: {}, rtree: new RBush() },
-	            sequences: {}
-	        };
 
-	        _oscSelectedImage = null;
-	    },
+	      function stackClear() {
+	        this.__data__ = new ListCache();
+	        this.size = 0;
+	      }
+	      /**
+	       * Removes `key` and its value from the stack.
+	       *
+	       * @private
+	       * @name delete
+	       * @memberOf Stack
+	       * @param {string} key The key of the value to remove.
+	       * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+	       */
 
 
-	    images: function(projection) {
-	        var limit = 5;
-	        return searchLimited$1(limit, projection, _oscCache.images.rtree);
-	    },
+	      function stackDelete(key) {
+	        var data = this.__data__,
+	            result = data['delete'](key);
+	        this.size = data.size;
+	        return result;
+	      }
+	      /**
+	       * Gets the stack value for `key`.
+	       *
+	       * @private
+	       * @name get
+	       * @memberOf Stack
+	       * @param {string} key The key of the value to get.
+	       * @returns {*} Returns the entry value.
+	       */
 
 
-	    sequences: function(projection) {
-	        var viewport = projection.clipExtent();
-	        var min = [viewport[0][0], viewport[1][1]];
-	        var max = [viewport[1][0], viewport[0][1]];
-	        var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-	        var sequenceKeys = {};
-
-	        // all sequences for images in viewport
-	        _oscCache.images.rtree.search(bbox)
-	            .forEach(function(d) { sequenceKeys[d.data.sequence_id] = true; });
-
-	        // make linestrings from those sequences
-	        var lineStrings = [];
-	        Object.keys(sequenceKeys)
-	            .forEach(function(sequenceKey) {
-	                var seq = _oscCache.sequences[sequenceKey];
-	                var images = seq && seq.images;
-	                if (images) {
-	                    lineStrings.push({
-	                        type: 'LineString',
-	                        coordinates: images.map(function (d) { return d.loc; }).filter(Boolean),
-	                        properties: { key: sequenceKey }
-	                    });
-	                }
-	            });
-	        return lineStrings;
-	    },
+	      function stackGet(key) {
+	        return this.__data__.get(key);
+	      }
+	      /**
+	       * Checks if a stack value for `key` exists.
+	       *
+	       * @private
+	       * @name has
+	       * @memberOf Stack
+	       * @param {string} key The key of the entry to check.
+	       * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+	       */
 
 
-	    loadImages: function(projection) {
-	        var url = apibase$2 + '/1.0/list/nearby-photos/';
-	        loadTiles$1('images', url, projection);
-	    },
+	      function stackHas(key) {
+	        return this.__data__.has(key);
+	      }
+	      /**
+	       * Sets the stack `key` to `value`.
+	       *
+	       * @private
+	       * @name set
+	       * @memberOf Stack
+	       * @param {string} key The key of the value to set.
+	       * @param {*} value The value to set.
+	       * @returns {Object} Returns the stack cache instance.
+	       */
 
 
-	    loadViewer: function(context) {
-	        var that = this;
+	      function stackSet(key, value) {
+	        var data = this.__data__;
 
-	        // add osc-wrapper
-	        var wrap = context.container().select('.photoviewer').selectAll('.osc-wrapper')
-	            .data([0]);
+	        if (data instanceof ListCache) {
+	          var pairs = data.__data__;
 
-	        var wrapEnter = wrap.enter()
-	            .append('div')
-	            .attr('class', 'photo-wrapper osc-wrapper')
-	            .classed('hide', true)
-	            .call(imgZoom.on('zoom', zoomPan))
-	            .on('dblclick.zoom', null);
+	          if (!Map || pairs.length < LARGE_ARRAY_SIZE - 1) {
+	            pairs.push([key, value]);
+	            this.size = ++data.size;
+	            return this;
+	          }
 
-	        wrapEnter
-	            .append('div')
-	            .attr('class', 'photo-attribution fillD');
+	          data = this.__data__ = new MapCache(pairs);
+	        }
 
-	        var controlsEnter = wrapEnter
-	            .append('div')
-	            .attr('class', 'photo-controls-wrap')
-	            .append('div')
-	            .attr('class', 'photo-controls');
+	        data.set(key, value);
+	        this.size = data.size;
+	        return this;
+	      } // Add methods to `Stack`.
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.back', step(-1))
-	            .text('◄');
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.rotate-ccw', rotate(-90))
-	            .text('⤿');
+	      Stack.prototype.clear = stackClear;
+	      Stack.prototype['delete'] = stackDelete;
+	      Stack.prototype.get = stackGet;
+	      Stack.prototype.has = stackHas;
+	      Stack.prototype.set = stackSet;
+	      /*------------------------------------------------------------------------*/
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.rotate-cw', rotate(90))
-	            .text('⤾');
+	      /**
+	       * Creates an array of the enumerable property names of the array-like `value`.
+	       *
+	       * @private
+	       * @param {*} value The value to query.
+	       * @param {boolean} inherited Specify returning inherited property names.
+	       * @returns {Array} Returns the array of property names.
+	       */
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.forward', step(1))
-	            .text('►');
+	      function arrayLikeKeys(value, inherited) {
+	        var isArr = isArray(value),
+	            isArg = !isArr && isArguments(value),
+	            isBuff = !isArr && !isArg && isBuffer(value),
+	            isType = !isArr && !isArg && !isBuff && isTypedArray(value),
+	            skipIndexes = isArr || isArg || isBuff || isType,
+	            result = skipIndexes ? baseTimes(value.length, String) : [],
+	            length = result.length;
+
+	        for (var key in value) {
+	          if ((inherited || hasOwnProperty.call(value, key)) && !(skipIndexes && ( // Safari 9 has enumerable `arguments.length` in strict mode.
+	          key == 'length' || // Node.js 0.10 has enumerable non-index properties on buffers.
+	          isBuff && (key == 'offset' || key == 'parent') || // PhantomJS 2 has enumerable non-index properties on typed arrays.
+	          isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset') || // Skip index properties.
+	          isIndex(key, length)))) {
+	            result.push(key);
+	          }
+	        }
 
-	        wrapEnter
-	            .append('div')
-	            .attr('class', 'osc-image-wrap');
+	        return result;
+	      }
+	      /**
+	       * A specialized version of `_.sample` for arrays.
+	       *
+	       * @private
+	       * @param {Array} array The array to sample.
+	       * @returns {*} Returns the random element.
+	       */
 
 
-	        // Register viewer resize handler
-	        context.ui().photoviewer.on('resize.openstreetcam', function(dimensions) {
-	            imgZoom = d3_zoom()
-	                .extent([[0, 0], dimensions])
-	                .translateExtent([[0, 0], dimensions])
-	                .scaleExtent([1, 15])
-	                .on('zoom', zoomPan);
-	        });
+	      function arraySample(array) {
+	        var length = array.length;
+	        return length ? array[baseRandom(0, length - 1)] : undefined$1;
+	      }
+	      /**
+	       * A specialized version of `_.sampleSize` for arrays.
+	       *
+	       * @private
+	       * @param {Array} array The array to sample.
+	       * @param {number} n The number of elements to sample.
+	       * @returns {Array} Returns the random elements.
+	       */
 
 
-	        function zoomPan() {
-	            var t = event.transform;
-	            context.container().select('.photoviewer .osc-image-wrap')
-	                .call(utilSetTransform, t.x, t.y, t.k);
-	        }
+	      function arraySampleSize(array, n) {
+	        return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));
+	      }
+	      /**
+	       * A specialized version of `_.shuffle` for arrays.
+	       *
+	       * @private
+	       * @param {Array} array The array to shuffle.
+	       * @returns {Array} Returns the new shuffled array.
+	       */
 
 
-	        function rotate(deg) {
-	            return function() {
-	                if (!_oscSelectedImage) { return; }
-	                var sequenceKey = _oscSelectedImage.sequence_id;
-	                var sequence = _oscCache.sequences[sequenceKey];
-	                if (!sequence) { return; }
+	      function arrayShuffle(array) {
+	        return shuffleSelf(copyArray(array));
+	      }
+	      /**
+	       * This function is like `assignValue` except that it doesn't assign
+	       * `undefined` values.
+	       *
+	       * @private
+	       * @param {Object} object The object to modify.
+	       * @param {string} key The key of the property to assign.
+	       * @param {*} value The value to assign.
+	       */
 
-	                var r = sequence.rotation || 0;
-	                r += deg;
 
-	                if (r > 180) { r -= 360; }
-	                if (r < -180) { r += 360; }
-	                sequence.rotation = r;
+	      function assignMergeValue(object, key, value) {
+	        if (value !== undefined$1 && !eq(object[key], value) || value === undefined$1 && !(key in object)) {
+	          baseAssignValue(object, key, value);
+	        }
+	      }
+	      /**
+	       * Assigns `value` to `key` of `object` if the existing value is not equivalent
+	       * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons.
+	       *
+	       * @private
+	       * @param {Object} object The object to modify.
+	       * @param {string} key The key of the property to assign.
+	       * @param {*} value The value to assign.
+	       */
 
-	                var wrap = context.container().select('.photoviewer .osc-wrapper');
 
-	                wrap
-	                    .transition()
-	                    .duration(100)
-	                    .call(imgZoom.transform, identity$2);
+	      function assignValue(object, key, value) {
+	        var objValue = object[key];
 
-	                wrap.selectAll('.osc-image')
-	                    .transition()
-	                    .duration(100)
-	                    .style('transform', 'rotate(' + r + 'deg)');
-	            };
+	        if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) || value === undefined$1 && !(key in object)) {
+	          baseAssignValue(object, key, value);
 	        }
+	      }
+	      /**
+	       * Gets the index at which the `key` is found in `array` of key-value pairs.
+	       *
+	       * @private
+	       * @param {Array} array The array to inspect.
+	       * @param {*} key The key to search for.
+	       * @returns {number} Returns the index of the matched value, else `-1`.
+	       */
 
-	        function step(stepBy) {
-	            return function() {
-	                if (!_oscSelectedImage) { return; }
-	                var sequenceKey = _oscSelectedImage.sequence_id;
-	                var sequence = _oscCache.sequences[sequenceKey];
-	                if (!sequence) { return; }
-
-	                var nextIndex = _oscSelectedImage.sequence_index + stepBy;
-	                var nextImage = sequence.images[nextIndex];
-	                if (!nextImage) { return; }
 
-	                context.map().centerEase(nextImage.loc);
+	      function assocIndexOf(array, key) {
+	        var length = array.length;
 
-	                that
-	                    .selectImage(context, nextImage)
-	                    .updateViewer(context, nextImage);
-	            };
+	        while (length--) {
+	          if (eq(array[length][0], key)) {
+	            return length;
+	          }
 	        }
-	    },
 
+	        return -1;
+	      }
+	      /**
+	       * Aggregates elements of `collection` on `accumulator` with keys transformed
+	       * by `iteratee` and values set by `setter`.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} setter The function to set `accumulator` values.
+	       * @param {Function} iteratee The iteratee to transform keys.
+	       * @param {Object} accumulator The initial aggregated object.
+	       * @returns {Function} Returns `accumulator`.
+	       */
 
-	    showViewer: function(context) {
-	        var viewer = context.container().select('.photoviewer')
-	            .classed('hide', false);
-
-	        var isHidden = viewer.selectAll('.photo-wrapper.osc-wrapper.hide').size();
 
-	        if (isHidden) {
-	            viewer
-	                .selectAll('.photo-wrapper:not(.osc-wrapper)')
-	                .classed('hide', true);
+	      function baseAggregator(collection, setter, iteratee, accumulator) {
+	        baseEach(collection, function (value, key, collection) {
+	          setter(accumulator, value, iteratee(value), collection);
+	        });
+	        return accumulator;
+	      }
+	      /**
+	       * The base implementation of `_.assign` without support for multiple sources
+	       * or `customizer` functions.
+	       *
+	       * @private
+	       * @param {Object} object The destination object.
+	       * @param {Object} source The source object.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	            viewer
-	                .selectAll('.photo-wrapper.osc-wrapper')
-	                .classed('hide', false);
-	        }
 
-	        return this;
-	    },
+	      function baseAssign(object, source) {
+	        return object && copyObject(source, keys(source), object);
+	      }
+	      /**
+	       * The base implementation of `_.assignIn` without support for multiple sources
+	       * or `customizer` functions.
+	       *
+	       * @private
+	       * @param {Object} object The destination object.
+	       * @param {Object} source The source object.
+	       * @returns {Object} Returns `object`.
+	       */
 
 
-	    hideViewer: function(context) {
-	        _oscSelectedImage = null;
+	      function baseAssignIn(object, source) {
+	        return object && copyObject(source, keysIn(source), object);
+	      }
+	      /**
+	       * The base implementation of `assignValue` and `assignMergeValue` without
+	       * value checks.
+	       *
+	       * @private
+	       * @param {Object} object The object to modify.
+	       * @param {string} key The key of the property to assign.
+	       * @param {*} value The value to assign.
+	       */
 
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(null); }
 
-	        viewer
-	            .classed('hide', true)
-	            .selectAll('.photo-wrapper')
-	            .classed('hide', true);
+	      function baseAssignValue(object, key, value) {
+	        if (key == '__proto__' && defineProperty) {
+	          defineProperty(object, key, {
+	            'configurable': true,
+	            'enumerable': true,
+	            'value': value,
+	            'writable': true
+	          });
+	        } else {
+	          object[key] = value;
+	        }
+	      }
+	      /**
+	       * The base implementation of `_.at` without support for individual paths.
+	       *
+	       * @private
+	       * @param {Object} object The object to iterate over.
+	       * @param {string[]} paths The property paths to pick.
+	       * @returns {Array} Returns the picked elements.
+	       */
 
-	        context.container().selectAll('.viewfield-group, .sequence, .icon-sign')
-	            .classed('currentView', false);
 
-	        return this.setStyles(context, null, true);
-	    },
+	      function baseAt(object, paths) {
+	        var index = -1,
+	            length = paths.length,
+	            result = Array(length),
+	            skip = object == null;
 
+	        while (++index < length) {
+	          result[index] = skip ? undefined$1 : get(object, paths[index]);
+	        }
 
-	    updateViewer: function(context, d) {
-	        var wrap = context.container().select('.photoviewer .osc-wrapper');
-	        var imageWrap = wrap.selectAll('.osc-image-wrap');
-	        var attribution = wrap.selectAll('.photo-attribution').html('');
-
-	        wrap
-	            .transition()
-	            .duration(100)
-	            .call(imgZoom.transform, identity$2);
-
-	        imageWrap
-	            .selectAll('.osc-image')
-	            .remove();
-
-	        if (d) {
-	            var sequence = _oscCache.sequences[d.sequence_id];
-	            var r = (sequence && sequence.rotation) || 0;
-
-	            imageWrap
-	                .append('img')
-	                .attr('class', 'osc-image')
-	                .attr('src', apibase$2 + '/' + d.imagePath)
-	                .style('transform', 'rotate(' + r + 'deg)');
-
-	            if (d.captured_by) {
-	                attribution
-	                    .append('a')
-	                    .attr('class', 'captured_by')
-	                    .attr('target', '_blank')
-	                    .attr('href', 'https://openstreetcam.org/user/' + encodeURIComponent(d.captured_by))
-	                    .text('@' + d.captured_by);
-
-	                attribution
-	                    .append('span')
-	                    .text('|');
-	            }
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.clamp` which doesn't coerce arguments.
+	       *
+	       * @private
+	       * @param {number} number The number to clamp.
+	       * @param {number} [lower] The lower bound.
+	       * @param {number} upper The upper bound.
+	       * @returns {number} Returns the clamped number.
+	       */
 
-	            if (d.captured_at) {
-	                attribution
-	                    .append('span')
-	                    .attr('class', 'captured_at')
-	                    .text(localeDateString(d.captured_at));
 
-	                attribution
-	                    .append('span')
-	                    .text('|');
-	            }
+	      function baseClamp(number, lower, upper) {
+	        if (number === number) {
+	          if (upper !== undefined$1) {
+	            number = number <= upper ? number : upper;
+	          }
 
-	            attribution
-	                .append('a')
-	                .attr('class', 'image-link')
-	                .attr('target', '_blank')
-	                .attr('href', 'https://openstreetcam.org/details/' + d.sequence_id + '/' + d.sequence_index)
-	                .text('openstreetcam.org');
+	          if (lower !== undefined$1) {
+	            number = number >= lower ? number : lower;
+	          }
 	        }
 
-	        return this;
+	        return number;
+	      }
+	      /**
+	       * The base implementation of `_.clone` and `_.cloneDeep` which tracks
+	       * traversed objects.
+	       *
+	       * @private
+	       * @param {*} value The value to clone.
+	       * @param {boolean} bitmask The bitmask flags.
+	       *  1 - Deep clone
+	       *  2 - Flatten inherited properties
+	       *  4 - Clone symbols
+	       * @param {Function} [customizer] The function to customize cloning.
+	       * @param {string} [key] The key of `value`.
+	       * @param {Object} [object] The parent object of `value`.
+	       * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
+	       * @returns {*} Returns the cloned value.
+	       */
+
 
+	      function baseClone(value, bitmask, customizer, key, object, stack) {
+	        var result,
+	            isDeep = bitmask & CLONE_DEEP_FLAG,
+	            isFlat = bitmask & CLONE_FLAT_FLAG,
+	            isFull = bitmask & CLONE_SYMBOLS_FLAG;
 
-	        function localeDateString(s) {
-	            if (!s) { return null; }
-	            var options = { day: 'numeric', month: 'short', year: 'numeric' };
-	            var d = new Date(s);
-	            if (isNaN(d.getTime())) { return null; }
-	            return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	        if (customizer) {
+	          result = object ? customizer(value, key, object, stack) : customizer(value);
 	        }
-	    },
 
+	        if (result !== undefined$1) {
+	          return result;
+	        }
 
-	    selectImage: function(context, d) {
-	        _oscSelectedImage = d;
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(d); }
+	        if (!isObject(value)) {
+	          return value;
+	        }
 
-	        this.setStyles(context, null, true);
+	        var isArr = isArray(value);
 
-	        context.container().selectAll('.icon-sign')
-	            .classed('currentView', false);
+	        if (isArr) {
+	          result = initCloneArray(value);
 
-	        return this;
-	    },
+	          if (!isDeep) {
+	            return copyArray(value, result);
+	          }
+	        } else {
+	          var tag = getTag(value),
+	              isFunc = tag == funcTag || tag == genTag;
 
+	          if (isBuffer(value)) {
+	            return cloneBuffer(value, isDeep);
+	          }
 
-	    getSelectedImage: function() {
-	        return _oscSelectedImage;
-	    },
+	          if (tag == objectTag || tag == argsTag || isFunc && !object) {
+	            result = isFlat || isFunc ? {} : initCloneObject(value);
 
+	            if (!isDeep) {
+	              return isFlat ? copySymbolsIn(value, baseAssignIn(result, value)) : copySymbols(value, baseAssign(result, value));
+	            }
+	          } else {
+	            if (!cloneableTags[tag]) {
+	              return object ? value : {};
+	            }
 
-	    getSequenceKeyForImage: function(d) {
-	        return d && d.sequence_id;
-	    },
+	            result = initCloneByTag(value, tag, isDeep);
+	          }
+	        } // Check for circular references and return its corresponding clone.
 
 
-	    // Updates the currently highlighted sequence and selected bubble.
-	    // Reset is only necessary when interacting with the viewport because
-	    // this implicitly changes the currently selected bubble/sequence
-	    setStyles: function(context, hovered, reset) {
-	        if (reset) {  // reset all layers
-	            context.container().selectAll('.viewfield-group')
-	                .classed('highlighted', false)
-	                .classed('hovered', false)
-	                .classed('currentView', false);
+	        stack || (stack = new Stack());
+	        var stacked = stack.get(value);
 
-	            context.container().selectAll('.sequence')
-	                .classed('highlighted', false)
-	                .classed('currentView', false);
+	        if (stacked) {
+	          return stacked;
 	        }
 
-	        var hoveredImageKey = hovered && hovered.key;
-	        var hoveredSequenceKey = this.getSequenceKeyForImage(hovered);
-	        var hoveredSequence = hoveredSequenceKey && _oscCache.sequences[hoveredSequenceKey];
-	        var hoveredImageKeys = (hoveredSequence && hoveredSequence.images.map(function (d) { return d.key; })) || [];
+	        stack.set(value, result);
 
-	        var viewer = context.container().select('.photoviewer');
-	        var selected = viewer.empty() ? undefined : viewer.datum();
-	        var selectedImageKey = selected && selected.key;
-	        var selectedSequenceKey = this.getSequenceKeyForImage(selected);
-	        var selectedSequence = selectedSequenceKey && _oscCache.sequences[selectedSequenceKey];
-	        var selectedImageKeys = (selectedSequence && selectedSequence.images.map(function (d) { return d.key; })) || [];
-
-	        // highlight sibling viewfields on either the selected or the hovered sequences
-	        var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
-
-	        context.container().selectAll('.layer-openstreetcam .viewfield-group')
-	            .classed('highlighted', function(d) { return highlightedImageKeys.indexOf(d.key) !== -1; })
-	            .classed('hovered', function(d) { return d.key === hoveredImageKey; })
-	            .classed('currentView', function(d) { return d.key === selectedImageKey; });
-
-	        context.container().selectAll('.layer-openstreetcam .sequence')
-	            .classed('highlighted', function(d) { return d.properties.key === hoveredSequenceKey; })
-	            .classed('currentView', function(d) { return d.properties.key === selectedSequenceKey; });
-
-	        // update viewfields if needed
-	        context.container().selectAll('.viewfield-group .viewfield')
-	            .attr('d', viewfieldPath);
-
-	        function viewfieldPath() {
-	            var d = this.parentNode.__data__;
-	            if (d.pano && d.key !== selectedImageKey) {
-	                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-	            } else {
-	                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-	            }
+	        if (isSet(value)) {
+	          value.forEach(function (subValue) {
+	            result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));
+	          });
+	        } else if (isMap(value)) {
+	          value.forEach(function (subValue, key) {
+	            result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));
+	          });
 	        }
 
-	        return this;
-	    },
+	        var keysFunc = isFull ? isFlat ? getAllKeysIn : getAllKeys : isFlat ? keysIn : keys;
+	        var props = isArr ? undefined$1 : keysFunc(value);
+	        arrayEach(props || value, function (subValue, key) {
+	          if (props) {
+	            key = subValue;
+	            subValue = value[key];
+	          } // Recursively populate clone (susceptible to call stack limits).
 
 
-	    cache: function() {
-	        return _oscCache;
-	    }
+	          assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
+	        });
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.conforms` which doesn't clone `source`.
+	       *
+	       * @private
+	       * @param {Object} source The object of property predicates to conform to.
+	       * @returns {Function} Returns the new spec function.
+	       */
 
-	};
 
-	/**
-	 * Checks if `value` is the
-	 * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
-	 * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 0.1.0
-	 * @category Lang
-	 * @param {*} value The value to check.
-	 * @returns {boolean} Returns `true` if `value` is an object, else `false`.
-	 * @example
-	 *
-	 * _.isObject({});
-	 * // => true
-	 *
-	 * _.isObject([1, 2, 3]);
-	 * // => true
-	 *
-	 * _.isObject(_.noop);
-	 * // => true
-	 *
-	 * _.isObject(null);
-	 * // => false
-	 */
-	function isObject$1(value) {
-	  var type = typeof value;
-	  return value != null && (type == 'object' || type == 'function');
-	}
+	      function baseConforms(source) {
+	        var props = keys(source);
+	        return function (object) {
+	          return baseConformsTo(object, source, props);
+	        };
+	      }
+	      /**
+	       * The base implementation of `_.conformsTo` which accepts `props` to check.
+	       *
+	       * @private
+	       * @param {Object} object The object to inspect.
+	       * @param {Object} source The object of property predicates to conform to.
+	       * @returns {boolean} Returns `true` if `object` conforms, else `false`.
+	       */
 
-	/** Detect free variable `global` from Node.js. */
-	var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
 
-	/** Detect free variable `self`. */
-	var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+	      function baseConformsTo(object, source, props) {
+	        var length = props.length;
 
-	/** Used as a reference to the global object. */
-	var root$2 = freeGlobal || freeSelf || Function('return this')();
+	        if (object == null) {
+	          return !length;
+	        }
 
-	/**
-	 * Gets the timestamp of the number of milliseconds that have elapsed since
-	 * the Unix epoch (1 January 1970 00:00:00 UTC).
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 2.4.0
-	 * @category Date
-	 * @returns {number} Returns the timestamp.
-	 * @example
-	 *
-	 * _.defer(function(stamp) {
-	 *   console.log(_.now() - stamp);
-	 * }, _.now());
-	 * // => Logs the number of milliseconds it took for the deferred invocation.
-	 */
-	var now$1 = function() {
-	  return root$2.Date.now();
-	};
+	        object = Object(object);
 
-	/** Built-in value references. */
-	var Symbol$1 = root$2.Symbol;
+	        while (length--) {
+	          var key = props[length],
+	              predicate = source[key],
+	              value = object[key];
 
-	/** Used for built-in method references. */
-	var objectProto = Object.prototype;
+	          if (value === undefined$1 && !(key in object) || !predicate(value)) {
+	            return false;
+	          }
+	        }
 
-	/** Used to check objects for own properties. */
-	var hasOwnProperty$2 = objectProto.hasOwnProperty;
+	        return true;
+	      }
+	      /**
+	       * The base implementation of `_.delay` and `_.defer` which accepts `args`
+	       * to provide to `func`.
+	       *
+	       * @private
+	       * @param {Function} func The function to delay.
+	       * @param {number} wait The number of milliseconds to delay invocation.
+	       * @param {Array} args The arguments to provide to `func`.
+	       * @returns {number|Object} Returns the timer id or timeout object.
+	       */
 
-	/**
-	 * Used to resolve the
-	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-	 * of values.
-	 */
-	var nativeObjectToString = objectProto.toString;
 
-	/** Built-in value references. */
-	var symToStringTag = Symbol$1 ? Symbol$1.toStringTag : undefined;
+	      function baseDelay(func, wait, args) {
+	        if (typeof func != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
+	        }
 
-	/**
-	 * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
-	 *
-	 * @private
-	 * @param {*} value The value to query.
-	 * @returns {string} Returns the raw `toStringTag`.
-	 */
-	function getRawTag(value) {
-	  var isOwn = hasOwnProperty$2.call(value, symToStringTag),
-	      tag = value[symToStringTag];
+	        return setTimeout(function () {
+	          func.apply(undefined$1, args);
+	        }, wait);
+	      }
+	      /**
+	       * The base implementation of methods like `_.difference` without support
+	       * for excluding multiple arrays or iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array} array The array to inspect.
+	       * @param {Array} values The values to exclude.
+	       * @param {Function} [iteratee] The iteratee invoked per element.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new array of filtered values.
+	       */
 
-	  try {
-	    value[symToStringTag] = undefined;
-	    var unmasked = true;
-	  } catch (e) {}
 
-	  var result = nativeObjectToString.call(value);
-	  if (unmasked) {
-	    if (isOwn) {
-	      value[symToStringTag] = tag;
-	    } else {
-	      delete value[symToStringTag];
-	    }
-	  }
-	  return result;
-	}
+	      function baseDifference(array, values, iteratee, comparator) {
+	        var index = -1,
+	            includes = arrayIncludes,
+	            isCommon = true,
+	            length = array.length,
+	            result = [],
+	            valuesLength = values.length;
 
-	/** Used for built-in method references. */
-	var objectProto$1 = Object.prototype;
+	        if (!length) {
+	          return result;
+	        }
 
-	/**
-	 * Used to resolve the
-	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-	 * of values.
-	 */
-	var nativeObjectToString$1 = objectProto$1.toString;
+	        if (iteratee) {
+	          values = arrayMap(values, baseUnary(iteratee));
+	        }
 
-	/**
-	 * Converts `value` to a string using `Object.prototype.toString`.
-	 *
-	 * @private
-	 * @param {*} value The value to convert.
-	 * @returns {string} Returns the converted string.
-	 */
-	function objectToString$2(value) {
-	  return nativeObjectToString$1.call(value);
-	}
+	        if (comparator) {
+	          includes = arrayIncludesWith;
+	          isCommon = false;
+	        } else if (values.length >= LARGE_ARRAY_SIZE) {
+	          includes = cacheHas;
+	          isCommon = false;
+	          values = new SetCache(values);
+	        }
 
-	/** `Object#toString` result references. */
-	var nullTag = '[object Null]',
-	    undefinedTag = '[object Undefined]';
+	        outer: while (++index < length) {
+	          var value = array[index],
+	              computed = iteratee == null ? value : iteratee(value);
+	          value = comparator || value !== 0 ? value : 0;
 
-	/** Built-in value references. */
-	var symToStringTag$1 = Symbol$1 ? Symbol$1.toStringTag : undefined;
+	          if (isCommon && computed === computed) {
+	            var valuesIndex = valuesLength;
 
-	/**
-	 * The base implementation of `getTag` without fallbacks for buggy environments.
-	 *
-	 * @private
-	 * @param {*} value The value to query.
-	 * @returns {string} Returns the `toStringTag`.
-	 */
-	function baseGetTag(value) {
-	  if (value == null) {
-	    return value === undefined ? undefinedTag : nullTag;
-	  }
-	  return (symToStringTag$1 && symToStringTag$1 in Object(value))
-	    ? getRawTag(value)
-	    : objectToString$2(value);
-	}
+	            while (valuesIndex--) {
+	              if (values[valuesIndex] === computed) {
+	                continue outer;
+	              }
+	            }
 
-	/**
-	 * Checks if `value` is object-like. A value is object-like if it's not `null`
-	 * and has a `typeof` result of "object".
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 4.0.0
-	 * @category Lang
-	 * @param {*} value The value to check.
-	 * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
-	 * @example
-	 *
-	 * _.isObjectLike({});
-	 * // => true
-	 *
-	 * _.isObjectLike([1, 2, 3]);
-	 * // => true
-	 *
-	 * _.isObjectLike(_.noop);
-	 * // => false
-	 *
-	 * _.isObjectLike(null);
-	 * // => false
-	 */
-	function isObjectLike(value) {
-	  return value != null && typeof value == 'object';
-	}
+	            result.push(value);
+	          } else if (!includes(values, computed, comparator)) {
+	            result.push(value);
+	          }
+	        }
 
-	/** `Object#toString` result references. */
-	var symbolTag = '[object Symbol]';
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.forEach` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} iteratee The function invoked per iteration.
+	       * @returns {Array|Object} Returns `collection`.
+	       */
 
-	/**
-	 * Checks if `value` is classified as a `Symbol` primitive or object.
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 4.0.0
-	 * @category Lang
-	 * @param {*} value The value to check.
-	 * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
-	 * @example
-	 *
-	 * _.isSymbol(Symbol.iterator);
-	 * // => true
-	 *
-	 * _.isSymbol('abc');
-	 * // => false
-	 */
-	function isSymbol$4(value) {
-	  return typeof value == 'symbol' ||
-	    (isObjectLike(value) && baseGetTag(value) == symbolTag);
-	}
 
-	/** Used as references for various `Number` constants. */
-	var NAN = 0 / 0;
+	      var baseEach = createBaseEach(baseForOwn);
+	      /**
+	       * The base implementation of `_.forEachRight` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} iteratee The function invoked per iteration.
+	       * @returns {Array|Object} Returns `collection`.
+	       */
 
-	/** Used to match leading and trailing whitespace. */
-	var reTrim = /^\s+|\s+$/g;
+	      var baseEachRight = createBaseEach(baseForOwnRight, true);
+	      /**
+	       * The base implementation of `_.every` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} predicate The function invoked per iteration.
+	       * @returns {boolean} Returns `true` if all elements pass the predicate check,
+	       *  else `false`
+	       */
 
-	/** Used to detect bad signed hexadecimal string values. */
-	var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+	      function baseEvery(collection, predicate) {
+	        var result = true;
+	        baseEach(collection, function (value, index, collection) {
+	          result = !!predicate(value, index, collection);
+	          return result;
+	        });
+	        return result;
+	      }
+	      /**
+	       * The base implementation of methods like `_.max` and `_.min` which accepts a
+	       * `comparator` to determine the extremum value.
+	       *
+	       * @private
+	       * @param {Array} array The array to iterate over.
+	       * @param {Function} iteratee The iteratee invoked per iteration.
+	       * @param {Function} comparator The comparator used to compare values.
+	       * @returns {*} Returns the extremum value.
+	       */
 
-	/** Used to detect binary string values. */
-	var reIsBinary = /^0b[01]+$/i;
 
-	/** Used to detect octal string values. */
-	var reIsOctal = /^0o[0-7]+$/i;
+	      function baseExtremum(array, iteratee, comparator) {
+	        var index = -1,
+	            length = array.length;
 
-	/** Built-in method references without a dependency on `root`. */
-	var freeParseInt = parseInt;
+	        while (++index < length) {
+	          var value = array[index],
+	              current = iteratee(value);
 
-	/**
-	 * Converts `value` to a number.
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 4.0.0
-	 * @category Lang
-	 * @param {*} value The value to process.
-	 * @returns {number} Returns the number.
-	 * @example
-	 *
-	 * _.toNumber(3.2);
-	 * // => 3.2
-	 *
-	 * _.toNumber(Number.MIN_VALUE);
-	 * // => 5e-324
-	 *
-	 * _.toNumber(Infinity);
-	 * // => Infinity
-	 *
-	 * _.toNumber('3.2');
-	 * // => 3.2
-	 */
-	function toNumber(value) {
-	  if (typeof value == 'number') {
-	    return value;
-	  }
-	  if (isSymbol$4(value)) {
-	    return NAN;
-	  }
-	  if (isObject$1(value)) {
-	    var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
-	    value = isObject$1(other) ? (other + '') : other;
-	  }
-	  if (typeof value != 'string') {
-	    return value === 0 ? value : +value;
-	  }
-	  value = value.replace(reTrim, '');
-	  var isBinary = reIsBinary.test(value);
-	  return (isBinary || reIsOctal.test(value))
-	    ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
-	    : (reIsBadHex.test(value) ? NAN : +value);
-	}
+	          if (current != null && (computed === undefined$1 ? current === current && !isSymbol(current) : comparator(current, computed))) {
+	            var computed = current,
+	                result = value;
+	          }
+	        }
 
-	/** Error message constants. */
-	var FUNC_ERROR_TEXT = 'Expected a function';
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.fill` without an iteratee call guard.
+	       *
+	       * @private
+	       * @param {Array} array The array to fill.
+	       * @param {*} value The value to fill `array` with.
+	       * @param {number} [start=0] The start position.
+	       * @param {number} [end=array.length] The end position.
+	       * @returns {Array} Returns `array`.
+	       */
 
-	/* Built-in method references for those with the same name as other `lodash` methods. */
-	var nativeMax = Math.max,
-	    nativeMin = Math.min;
 
-	/**
-	 * Creates a debounced function that delays invoking `func` until after `wait`
-	 * milliseconds have elapsed since the last time the debounced function was
-	 * invoked. The debounced function comes with a `cancel` method to cancel
-	 * delayed `func` invocations and a `flush` method to immediately invoke them.
-	 * Provide `options` to indicate whether `func` should be invoked on the
-	 * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
-	 * with the last arguments provided to the debounced function. Subsequent
-	 * calls to the debounced function return the result of the last `func`
-	 * invocation.
-	 *
-	 * **Note:** If `leading` and `trailing` options are `true`, `func` is
-	 * invoked on the trailing edge of the timeout only if the debounced function
-	 * is invoked more than once during the `wait` timeout.
-	 *
-	 * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
-	 * until to the next tick, similar to `setTimeout` with a timeout of `0`.
-	 *
-	 * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
-	 * for details over the differences between `_.debounce` and `_.throttle`.
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 0.1.0
-	 * @category Function
-	 * @param {Function} func The function to debounce.
-	 * @param {number} [wait=0] The number of milliseconds to delay.
-	 * @param {Object} [options={}] The options object.
-	 * @param {boolean} [options.leading=false]
-	 *  Specify invoking on the leading edge of the timeout.
-	 * @param {number} [options.maxWait]
-	 *  The maximum time `func` is allowed to be delayed before it's invoked.
-	 * @param {boolean} [options.trailing=true]
-	 *  Specify invoking on the trailing edge of the timeout.
-	 * @returns {Function} Returns the new debounced function.
-	 * @example
-	 *
-	 * // Avoid costly calculations while the window size is in flux.
-	 * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
-	 *
-	 * // Invoke `sendMail` when clicked, debouncing subsequent calls.
-	 * jQuery(element).on('click', _.debounce(sendMail, 300, {
-	 *   'leading': true,
-	 *   'trailing': false
-	 * }));
-	 *
-	 * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
-	 * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
-	 * var source = new EventSource('/stream');
-	 * jQuery(source).on('message', debounced);
-	 *
-	 * // Cancel the trailing debounced invocation.
-	 * jQuery(window).on('popstate', debounced.cancel);
-	 */
-	function debounce(func, wait, options) {
-	  var lastArgs,
-	      lastThis,
-	      maxWait,
-	      result,
-	      timerId,
-	      lastCallTime,
-	      lastInvokeTime = 0,
-	      leading = false,
-	      maxing = false,
-	      trailing = true;
+	      function baseFill(array, value, start, end) {
+	        var length = array.length;
+	        start = toInteger(start);
 
-	  if (typeof func != 'function') {
-	    throw new TypeError(FUNC_ERROR_TEXT);
-	  }
-	  wait = toNumber(wait) || 0;
-	  if (isObject$1(options)) {
-	    leading = !!options.leading;
-	    maxing = 'maxWait' in options;
-	    maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
-	    trailing = 'trailing' in options ? !!options.trailing : trailing;
-	  }
+	        if (start < 0) {
+	          start = -start > length ? 0 : length + start;
+	        }
 
-	  function invokeFunc(time) {
-	    var args = lastArgs,
-	        thisArg = lastThis;
+	        end = end === undefined$1 || end > length ? length : toInteger(end);
 
-	    lastArgs = lastThis = undefined;
-	    lastInvokeTime = time;
-	    result = func.apply(thisArg, args);
-	    return result;
-	  }
+	        if (end < 0) {
+	          end += length;
+	        }
 
-	  function leadingEdge(time) {
-	    // Reset any `maxWait` timer.
-	    lastInvokeTime = time;
-	    // Start the timer for the trailing edge.
-	    timerId = setTimeout(timerExpired, wait);
-	    // Invoke the leading edge.
-	    return leading ? invokeFunc(time) : result;
-	  }
+	        end = start > end ? 0 : toLength(end);
 
-	  function remainingWait(time) {
-	    var timeSinceLastCall = time - lastCallTime,
-	        timeSinceLastInvoke = time - lastInvokeTime,
-	        timeWaiting = wait - timeSinceLastCall;
+	        while (start < end) {
+	          array[start++] = value;
+	        }
 
-	    return maxing
-	      ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)
-	      : timeWaiting;
-	  }
+	        return array;
+	      }
+	      /**
+	       * The base implementation of `_.filter` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} predicate The function invoked per iteration.
+	       * @returns {Array} Returns the new filtered array.
+	       */
 
-	  function shouldInvoke(time) {
-	    var timeSinceLastCall = time - lastCallTime,
-	        timeSinceLastInvoke = time - lastInvokeTime;
 
-	    // Either this is the first call, activity has stopped and we're at the
-	    // trailing edge, the system time has gone backwards and we're treating
-	    // it as the trailing edge, or we've hit the `maxWait` limit.
-	    return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
-	      (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
-	  }
+	      function baseFilter(collection, predicate) {
+	        var result = [];
+	        baseEach(collection, function (value, index, collection) {
+	          if (predicate(value, index, collection)) {
+	            result.push(value);
+	          }
+	        });
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.flatten` with support for restricting flattening.
+	       *
+	       * @private
+	       * @param {Array} array The array to flatten.
+	       * @param {number} depth The maximum recursion depth.
+	       * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
+	       * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
+	       * @param {Array} [result=[]] The initial result value.
+	       * @returns {Array} Returns the new flattened array.
+	       */
 
-	  function timerExpired() {
-	    var time = now$1();
-	    if (shouldInvoke(time)) {
-	      return trailingEdge(time);
-	    }
-	    // Restart the timer.
-	    timerId = setTimeout(timerExpired, remainingWait(time));
-	  }
 
-	  function trailingEdge(time) {
-	    timerId = undefined;
+	      function baseFlatten(array, depth, predicate, isStrict, result) {
+	        var index = -1,
+	            length = array.length;
+	        predicate || (predicate = isFlattenable);
+	        result || (result = []);
 
-	    // Only invoke if we have `lastArgs` which means `func` has been
-	    // debounced at least once.
-	    if (trailing && lastArgs) {
-	      return invokeFunc(time);
-	    }
-	    lastArgs = lastThis = undefined;
-	    return result;
-	  }
+	        while (++index < length) {
+	          var value = array[index];
 
-	  function cancel() {
-	    if (timerId !== undefined) {
-	      clearTimeout(timerId);
-	    }
-	    lastInvokeTime = 0;
-	    lastArgs = lastCallTime = lastThis = timerId = undefined;
-	  }
+	          if (depth > 0 && predicate(value)) {
+	            if (depth > 1) {
+	              // Recursively flatten arrays (susceptible to call stack limits).
+	              baseFlatten(value, depth - 1, predicate, isStrict, result);
+	            } else {
+	              arrayPush(result, value);
+	            }
+	          } else if (!isStrict) {
+	            result[result.length] = value;
+	          }
+	        }
 
-	  function flush() {
-	    return timerId === undefined ? result : trailingEdge(now$1());
-	  }
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `baseForOwn` which iterates over `object`
+	       * properties returned by `keysFunc` and invokes `iteratee` for each property.
+	       * Iteratee functions may exit iteration early by explicitly returning `false`.
+	       *
+	       * @private
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} iteratee The function invoked per iteration.
+	       * @param {Function} keysFunc The function to get the keys of `object`.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	  function debounced() {
-	    var time = now$1(),
-	        isInvoking = shouldInvoke(time);
 
-	    lastArgs = arguments;
-	    lastThis = this;
-	    lastCallTime = time;
+	      var baseFor = createBaseFor();
+	      /**
+	       * This function is like `baseFor` except that it iterates over properties
+	       * in the opposite order.
+	       *
+	       * @private
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} iteratee The function invoked per iteration.
+	       * @param {Function} keysFunc The function to get the keys of `object`.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	    if (isInvoking) {
-	      if (timerId === undefined) {
-	        return leadingEdge(lastCallTime);
-	      }
-	      if (maxing) {
-	        // Handle invocations in a tight loop.
-	        clearTimeout(timerId);
-	        timerId = setTimeout(timerExpired, wait);
-	        return invokeFunc(lastCallTime);
+	      var baseForRight = createBaseFor(true);
+	      /**
+	       * The base implementation of `_.forOwn` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} iteratee The function invoked per iteration.
+	       * @returns {Object} Returns `object`.
+	       */
+
+	      function baseForOwn(object, iteratee) {
+	        return object && baseFor(object, iteratee, keys);
 	      }
-	    }
-	    if (timerId === undefined) {
-	      timerId = setTimeout(timerExpired, wait);
-	    }
-	    return result;
-	  }
-	  debounced.cancel = cancel;
-	  debounced.flush = flush;
-	  return debounced;
-	}
+	      /**
+	       * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} iteratee The function invoked per iteration.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	/** Error message constants. */
-	var FUNC_ERROR_TEXT$1 = 'Expected a function';
 
-	/**
-	 * Creates a throttled function that only invokes `func` at most once per
-	 * every `wait` milliseconds. The throttled function comes with a `cancel`
-	 * method to cancel delayed `func` invocations and a `flush` method to
-	 * immediately invoke them. Provide `options` to indicate whether `func`
-	 * should be invoked on the leading and/or trailing edge of the `wait`
-	 * timeout. The `func` is invoked with the last arguments provided to the
-	 * throttled function. Subsequent calls to the throttled function return the
-	 * result of the last `func` invocation.
-	 *
-	 * **Note:** If `leading` and `trailing` options are `true`, `func` is
-	 * invoked on the trailing edge of the timeout only if the throttled function
-	 * is invoked more than once during the `wait` timeout.
-	 *
-	 * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
-	 * until to the next tick, similar to `setTimeout` with a timeout of `0`.
-	 *
-	 * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
-	 * for details over the differences between `_.throttle` and `_.debounce`.
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 0.1.0
-	 * @category Function
-	 * @param {Function} func The function to throttle.
-	 * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
-	 * @param {Object} [options={}] The options object.
-	 * @param {boolean} [options.leading=true]
-	 *  Specify invoking on the leading edge of the timeout.
-	 * @param {boolean} [options.trailing=true]
-	 *  Specify invoking on the trailing edge of the timeout.
-	 * @returns {Function} Returns the new throttled function.
-	 * @example
-	 *
-	 * // Avoid excessively updating the position while scrolling.
-	 * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
-	 *
-	 * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
-	 * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
-	 * jQuery(element).on('click', throttled);
-	 *
-	 * // Cancel the trailing throttled invocation.
-	 * jQuery(window).on('popstate', throttled.cancel);
-	 */
-	function throttle(func, wait, options) {
-	  var leading = true,
-	      trailing = true;
+	      function baseForOwnRight(object, iteratee) {
+	        return object && baseForRight(object, iteratee, keys);
+	      }
+	      /**
+	       * The base implementation of `_.functions` which creates an array of
+	       * `object` function property names filtered from `props`.
+	       *
+	       * @private
+	       * @param {Object} object The object to inspect.
+	       * @param {Array} props The property names to filter.
+	       * @returns {Array} Returns the function names.
+	       */
+
 
-	  if (typeof func != 'function') {
-	    throw new TypeError(FUNC_ERROR_TEXT$1);
-	  }
-	  if (isObject$1(options)) {
-	    leading = 'leading' in options ? !!options.leading : leading;
-	    trailing = 'trailing' in options ? !!options.trailing : trailing;
-	  }
-	  return debounce(func, wait, {
-	    'leading': leading,
-	    'maxWait': wait,
-	    'trailing': trailing
-	  });
-	}
+	      function baseFunctions(object, props) {
+	        return arrayFilter(props, function (key) {
+	          return isFunction(object[key]);
+	        });
+	      }
+	      /**
+	       * The base implementation of `_.get` without support for default values.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path of the property to get.
+	       * @returns {*} Returns the resolved value.
+	       */
 
-	var hashes = createCommonjsModule(function (module, exports) {
-	/**
-	 * jshashes - https://github.com/h2non/jshashes
-	 * Released under the "New BSD" license
-	 *
-	 * Algorithms specification:
-	 *
-	 * MD5 - http://www.ietf.org/rfc/rfc1321.txt
-	 * RIPEMD-160 - http://homes.esat.kuleuven.be/~bosselae/ripemd160.html
-	 * SHA1   - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
-	 * SHA256 - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
-	 * SHA512 - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
-	 * HMAC - http://www.ietf.org/rfc/rfc2104.txt
-	 */
-	(function() {
-	  var Hashes;
 
-	  function utf8Encode(str) {
-	    var x, y, output = '',
-	      i = -1,
-	      l;
-
-	    if (str && str.length) {
-	      l = str.length;
-	      while ((i += 1) < l) {
-	        /* Decode utf-16 surrogate pairs */
-	        x = str.charCodeAt(i);
-	        y = i + 1 < l ? str.charCodeAt(i + 1) : 0;
-	        if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
-	          x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
-	          i += 1;
-	        }
-	        /* Encode output as utf-8 */
-	        if (x <= 0x7F) {
-	          output += String.fromCharCode(x);
-	        } else if (x <= 0x7FF) {
-	          output += String.fromCharCode(0xC0 | ((x >>> 6) & 0x1F),
-	            0x80 | (x & 0x3F));
-	        } else if (x <= 0xFFFF) {
-	          output += String.fromCharCode(0xE0 | ((x >>> 12) & 0x0F),
-	            0x80 | ((x >>> 6) & 0x3F),
-	            0x80 | (x & 0x3F));
-	        } else if (x <= 0x1FFFFF) {
-	          output += String.fromCharCode(0xF0 | ((x >>> 18) & 0x07),
-	            0x80 | ((x >>> 12) & 0x3F),
-	            0x80 | ((x >>> 6) & 0x3F),
-	            0x80 | (x & 0x3F));
+	      function baseGet(object, path) {
+	        path = castPath(path, object);
+	        var index = 0,
+	            length = path.length;
+
+	        while (object != null && index < length) {
+	          object = object[toKey(path[index++])];
 	        }
+
+	        return index && index == length ? object : undefined$1;
 	      }
-	    }
-	    return output;
-	  }
+	      /**
+	       * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
+	       * `keysFunc` and `symbolsFunc` to get the enumerable property names and
+	       * symbols of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @param {Function} keysFunc The function to get the keys of `object`.
+	       * @param {Function} symbolsFunc The function to get the symbols of `object`.
+	       * @returns {Array} Returns the array of property names and symbols.
+	       */
 
-	  function utf8Decode(str) {
-	    var i, ac, c1, c2, c3, arr = [],
-	      l;
-	    i = ac = c1 = c2 = c3 = 0;
-
-	    if (str && str.length) {
-	      l = str.length;
-	      str += '';
-
-	      while (i < l) {
-	        c1 = str.charCodeAt(i);
-	        ac += 1;
-	        if (c1 < 128) {
-	          arr[ac] = String.fromCharCode(c1);
-	          i += 1;
-	        } else if (c1 > 191 && c1 < 224) {
-	          c2 = str.charCodeAt(i + 1);
-	          arr[ac] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));
-	          i += 2;
-	        } else {
-	          c2 = str.charCodeAt(i + 1);
-	          c3 = str.charCodeAt(i + 2);
-	          arr[ac] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
-	          i += 3;
+
+	      function baseGetAllKeys(object, keysFunc, symbolsFunc) {
+	        var result = keysFunc(object);
+	        return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
+	      }
+	      /**
+	       * The base implementation of `getTag` without fallbacks for buggy environments.
+	       *
+	       * @private
+	       * @param {*} value The value to query.
+	       * @returns {string} Returns the `toStringTag`.
+	       */
+
+
+	      function baseGetTag(value) {
+	        if (value == null) {
+	          return value === undefined$1 ? undefinedTag : nullTag;
 	        }
+
+	        return symToStringTag && symToStringTag in Object(value) ? getRawTag(value) : objectToString(value);
 	      }
-	    }
-	    return arr.join('');
-	  }
+	      /**
+	       * The base implementation of `_.gt` which doesn't coerce arguments.
+	       *
+	       * @private
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if `value` is greater than `other`,
+	       *  else `false`.
+	       */
 
-	  /**
-	   * Add integers, wrapping at 2^32. This uses 16-bit operations internally
-	   * to work around bugs in some JS interpreters.
-	   */
 
-	  function safe_add(x, y) {
-	    var lsw = (x & 0xFFFF) + (y & 0xFFFF),
-	      msw = (x >> 16) + (y >> 16) + (lsw >> 16);
-	    return (msw << 16) | (lsw & 0xFFFF);
-	  }
+	      function baseGt(value, other) {
+	        return value > other;
+	      }
+	      /**
+	       * The base implementation of `_.has` without support for deep paths.
+	       *
+	       * @private
+	       * @param {Object} [object] The object to query.
+	       * @param {Array|string} key The key to check.
+	       * @returns {boolean} Returns `true` if `key` exists, else `false`.
+	       */
 
-	  /**
-	   * Bitwise rotate a 32-bit number to the left.
-	   */
 
-	  function bit_rol(num, cnt) {
-	    return (num << cnt) | (num >>> (32 - cnt));
-	  }
+	      function baseHas(object, key) {
+	        return object != null && hasOwnProperty.call(object, key);
+	      }
+	      /**
+	       * The base implementation of `_.hasIn` without support for deep paths.
+	       *
+	       * @private
+	       * @param {Object} [object] The object to query.
+	       * @param {Array|string} key The key to check.
+	       * @returns {boolean} Returns `true` if `key` exists, else `false`.
+	       */
 
-	  /**
-	   * Convert a raw string to a hex string
-	   */
 
-	  function rstr2hex(input, hexcase) {
-	    var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
-	      output = '',
-	      x, i = 0,
-	      l = input.length;
-	    for (; i < l; i += 1) {
-	      x = input.charCodeAt(i);
-	      output += hex_tab.charAt((x >>> 4) & 0x0F) + hex_tab.charAt(x & 0x0F);
-	    }
-	    return output;
-	  }
+	      function baseHasIn(object, key) {
+	        return object != null && key in Object(object);
+	      }
+	      /**
+	       * The base implementation of `_.inRange` which doesn't coerce arguments.
+	       *
+	       * @private
+	       * @param {number} number The number to check.
+	       * @param {number} start The start of the range.
+	       * @param {number} end The end of the range.
+	       * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
+	       */
 
-	  /**
-	   * Convert an array of big-endian words to a string
-	   */
 
-	  function binb2rstr(input) {
-	    var i, l = input.length * 32,
-	      output = '';
-	    for (i = 0; i < l; i += 8) {
-	      output += String.fromCharCode((input[i >> 5] >>> (24 - i % 32)) & 0xFF);
-	    }
-	    return output;
-	  }
+	      function baseInRange(number, start, end) {
+	        return number >= nativeMin(start, end) && number < nativeMax(start, end);
+	      }
+	      /**
+	       * The base implementation of methods like `_.intersection`, without support
+	       * for iteratee shorthands, that accepts an array of arrays to inspect.
+	       *
+	       * @private
+	       * @param {Array} arrays The arrays to inspect.
+	       * @param {Function} [iteratee] The iteratee invoked per element.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new array of shared values.
+	       */
 
-	  /**
-	   * Convert an array of little-endian words to a string
-	   */
 
-	  function binl2rstr(input) {
-	    var i, l = input.length * 32,
-	      output = '';
-	    for (i = 0; i < l; i += 8) {
-	      output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xFF);
-	    }
-	    return output;
-	  }
+	      function baseIntersection(arrays, iteratee, comparator) {
+	        var includes = comparator ? arrayIncludesWith : arrayIncludes,
+	            length = arrays[0].length,
+	            othLength = arrays.length,
+	            othIndex = othLength,
+	            caches = Array(othLength),
+	            maxLength = Infinity,
+	            result = [];
 
-	  /**
-	   * Convert a raw string to an array of little-endian words
-	   * Characters >255 have their high-byte silently ignored.
-	   */
+	        while (othIndex--) {
+	          var array = arrays[othIndex];
 
-	  function rstr2binl(input) {
-	    var i, l = input.length * 8,
-	      output = Array(input.length >> 2),
-	      lo = output.length;
-	    for (i = 0; i < lo; i += 1) {
-	      output[i] = 0;
-	    }
-	    for (i = 0; i < l; i += 8) {
-	      output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << (i % 32);
-	    }
-	    return output;
-	  }
+	          if (othIndex && iteratee) {
+	            array = arrayMap(array, baseUnary(iteratee));
+	          }
 
-	  /**
-	   * Convert a raw string to an array of big-endian words
-	   * Characters >255 have their high-byte silently ignored.
-	   */
+	          maxLength = nativeMin(array.length, maxLength);
+	          caches[othIndex] = !comparator && (iteratee || length >= 120 && array.length >= 120) ? new SetCache(othIndex && array) : undefined$1;
+	        }
 
-	  function rstr2binb(input) {
-	    var i, l = input.length * 8,
-	      output = Array(input.length >> 2),
-	      lo = output.length;
-	    for (i = 0; i < lo; i += 1) {
-	      output[i] = 0;
-	    }
-	    for (i = 0; i < l; i += 8) {
-	      output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << (24 - i % 32);
-	    }
-	    return output;
-	  }
+	        array = arrays[0];
+	        var index = -1,
+	            seen = caches[0];
 
-	  /**
-	   * Convert a raw string to an arbitrary string encoding
-	   */
+	        outer: while (++index < length && result.length < maxLength) {
+	          var value = array[index],
+	              computed = iteratee ? iteratee(value) : value;
+	          value = comparator || value !== 0 ? value : 0;
 
-	  function rstr2any(input, encoding) {
-	    var divisor = encoding.length,
-	      remainders = Array(),
-	      i, q, x, ld, quotient, dividend, output, full_length;
+	          if (!(seen ? cacheHas(seen, computed) : includes(result, computed, comparator))) {
+	            othIndex = othLength;
 
-	    /* Convert to an array of 16-bit big-endian values, forming the dividend */
-	    dividend = Array(Math.ceil(input.length / 2));
-	    ld = dividend.length;
-	    for (i = 0; i < ld; i += 1) {
-	      dividend[i] = (input.charCodeAt(i * 2) << 8) | input.charCodeAt(i * 2 + 1);
-	    }
+	            while (--othIndex) {
+	              var cache = caches[othIndex];
 
-	    /**
-	     * Repeatedly perform a long division. The binary array forms the dividend,
-	     * the length of the encoding is the divisor. Once computed, the quotient
-	     * forms the dividend for the next step. We stop when the dividend is zerHashes.
-	     * All remainders are stored for later use.
-	     */
-	    while (dividend.length > 0) {
-	      quotient = Array();
-	      x = 0;
-	      for (i = 0; i < dividend.length; i += 1) {
-	        x = (x << 16) + dividend[i];
-	        q = Math.floor(x / divisor);
-	        x -= q * divisor;
-	        if (quotient.length > 0 || q > 0) {
-	          quotient[quotient.length] = q;
+	              if (!(cache ? cacheHas(cache, computed) : includes(arrays[othIndex], computed, comparator))) {
+	                continue outer;
+	              }
+	            }
+
+	            if (seen) {
+	              seen.push(computed);
+	            }
+
+	            result.push(value);
+	          }
 	        }
+
+	        return result;
 	      }
-	      remainders[remainders.length] = x;
-	      dividend = quotient;
-	    }
+	      /**
+	       * The base implementation of `_.invert` and `_.invertBy` which inverts
+	       * `object` with values transformed by `iteratee` and set by `setter`.
+	       *
+	       * @private
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} setter The function to set `accumulator` values.
+	       * @param {Function} iteratee The iteratee to transform values.
+	       * @param {Object} accumulator The initial inverted object.
+	       * @returns {Function} Returns `accumulator`.
+	       */
 
-	    /* Convert the remainders to the output string */
-	    output = '';
-	    for (i = remainders.length - 1; i >= 0; i--) {
-	      output += encoding.charAt(remainders[i]);
-	    }
 
-	    /* Append leading zero equivalents */
-	    full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
-	    for (i = output.length; i < full_length; i += 1) {
-	      output = encoding[0] + output;
-	    }
-	    return output;
-	  }
+	      function baseInverter(object, setter, iteratee, accumulator) {
+	        baseForOwn(object, function (value, key, object) {
+	          setter(accumulator, iteratee(value), key, object);
+	        });
+	        return accumulator;
+	      }
+	      /**
+	       * The base implementation of `_.invoke` without support for individual
+	       * method arguments.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path of the method to invoke.
+	       * @param {Array} args The arguments to invoke the method with.
+	       * @returns {*} Returns the result of the invoked method.
+	       */
 
-	  /**
-	   * Convert a raw string to a base-64 string
-	   */
 
-	  function rstr2b64(input, b64pad) {
-	    var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
-	      output = '',
-	      len = input.length,
-	      i, j, triplet;
-	    b64pad = b64pad || '=';
-	    for (i = 0; i < len; i += 3) {
-	      triplet = (input.charCodeAt(i) << 16) | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
-	      for (j = 0; j < 4; j += 1) {
-	        if (i * 8 + j * 6 > input.length * 8) {
-	          output += b64pad;
-	        } else {
-	          output += tab.charAt((triplet >>> 6 * (3 - j)) & 0x3F);
+	      function baseInvoke(object, path, args) {
+	        path = castPath(path, object);
+	        object = parent(object, path);
+	        var func = object == null ? object : object[toKey(last(path))];
+	        return func == null ? undefined$1 : apply(func, object, args);
+	      }
+	      /**
+	       * The base implementation of `_.isArguments`.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+	       */
+
+
+	      function baseIsArguments(value) {
+	        return isObjectLike(value) && baseGetTag(value) == argsTag;
+	      }
+	      /**
+	       * The base implementation of `_.isArrayBuffer` without Node.js optimizations.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
+	       */
+
+
+	      function baseIsArrayBuffer(value) {
+	        return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;
+	      }
+	      /**
+	       * The base implementation of `_.isDate` without Node.js optimizations.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
+	       */
+
+
+	      function baseIsDate(value) {
+	        return isObjectLike(value) && baseGetTag(value) == dateTag;
+	      }
+	      /**
+	       * The base implementation of `_.isEqual` which supports partial comparisons
+	       * and tracks traversed objects.
+	       *
+	       * @private
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @param {boolean} bitmask The bitmask flags.
+	       *  1 - Unordered comparison
+	       *  2 - Partial comparison
+	       * @param {Function} [customizer] The function to customize comparisons.
+	       * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+	       * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+	       */
+
+
+	      function baseIsEqual(value, other, bitmask, customizer, stack) {
+	        if (value === other) {
+	          return true;
+	        }
+
+	        if (value == null || other == null || !isObjectLike(value) && !isObjectLike(other)) {
+	          return value !== value && other !== other;
 	        }
+
+	        return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
 	      }
-	    }
-	    return output;
-	  }
+	      /**
+	       * A specialized version of `baseIsEqual` for arrays and objects which performs
+	       * deep comparisons and tracks traversed objects enabling objects with circular
+	       * references to be compared.
+	       *
+	       * @private
+	       * @param {Object} object The object to compare.
+	       * @param {Object} other The other object to compare.
+	       * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+	       * @param {Function} customizer The function to customize comparisons.
+	       * @param {Function} equalFunc The function to determine equivalents of values.
+	       * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+	       * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+	       */
 
-	  Hashes = {
-	    /**
-	     * @property {String} version
-	     * @readonly
-	     */
-	    VERSION: '1.0.6',
-	    /**
-	     * @member Hashes
-	     * @class Base64
-	     * @constructor
-	     */
-	    Base64: function() {
-	      // private properties
-	      var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
-	        pad = '=', // default pad according with the RFC standard
-	        utf8 = true; // by default enable UTF-8 support encoding
 
-	      // public method for encoding
-	      this.encode = function(input) {
-	        var i, j, triplet,
-	          output = '',
-	          len = input.length;
+	      function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
+	        var objIsArr = isArray(object),
+	            othIsArr = isArray(other),
+	            objTag = objIsArr ? arrayTag : getTag(object),
+	            othTag = othIsArr ? arrayTag : getTag(other);
+	        objTag = objTag == argsTag ? objectTag : objTag;
+	        othTag = othTag == argsTag ? objectTag : othTag;
+	        var objIsObj = objTag == objectTag,
+	            othIsObj = othTag == objectTag,
+	            isSameTag = objTag == othTag;
 
-	        pad = pad || '=';
-	        input = (utf8) ? utf8Encode(input) : input;
+	        if (isSameTag && isBuffer(object)) {
+	          if (!isBuffer(other)) {
+	            return false;
+	          }
 
-	        for (i = 0; i < len; i += 3) {
-	          triplet = (input.charCodeAt(i) << 16) | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
-	          for (j = 0; j < 4; j += 1) {
-	            if (i * 8 + j * 6 > len * 8) {
-	              output += pad;
-	            } else {
-	              output += tab.charAt((triplet >>> 6 * (3 - j)) & 0x3F);
-	            }
+	          objIsArr = true;
+	          objIsObj = false;
+	        }
+
+	        if (isSameTag && !objIsObj) {
+	          stack || (stack = new Stack());
+	          return objIsArr || isTypedArray(object) ? equalArrays(object, other, bitmask, customizer, equalFunc, stack) : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
+	        }
+
+	        if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
+	          var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+	              othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+	          if (objIsWrapped || othIsWrapped) {
+	            var objUnwrapped = objIsWrapped ? object.value() : object,
+	                othUnwrapped = othIsWrapped ? other.value() : other;
+	            stack || (stack = new Stack());
+	            return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
 	          }
 	        }
-	        return output;
-	      };
 
-	      // public method for decoding
-	      this.decode = function(input) {
-	        // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
-	        var i, o1, o2, o3, h1, h2, h3, h4, bits, ac,
-	          dec = '',
-	          arr = [];
-	        if (!input) {
-	          return input;
+	        if (!isSameTag) {
+	          return false;
 	        }
 
-	        i = ac = 0;
-	        input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
-	        //input += '';
+	        stack || (stack = new Stack());
+	        return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
+	      }
+	      /**
+	       * The base implementation of `_.isMap` without Node.js optimizations.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a map, else `false`.
+	       */
+
+
+	      function baseIsMap(value) {
+	        return isObjectLike(value) && getTag(value) == mapTag;
+	      }
+	      /**
+	       * The base implementation of `_.isMatch` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Object} object The object to inspect.
+	       * @param {Object} source The object of property values to match.
+	       * @param {Array} matchData The property names, values, and compare flags to match.
+	       * @param {Function} [customizer] The function to customize comparisons.
+	       * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+	       */
 
-	        do { // unpack four hexets into three octets using index points in b64
-	          h1 = tab.indexOf(input.charAt(i += 1));
-	          h2 = tab.indexOf(input.charAt(i += 1));
-	          h3 = tab.indexOf(input.charAt(i += 1));
-	          h4 = tab.indexOf(input.charAt(i += 1));
 
-	          bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
+	      function baseIsMatch(object, source, matchData, customizer) {
+	        var index = matchData.length,
+	            length = index,
+	            noCustomizer = !customizer;
 
-	          o1 = bits >> 16 & 0xff;
-	          o2 = bits >> 8 & 0xff;
-	          o3 = bits & 0xff;
-	          ac += 1;
+	        if (object == null) {
+	          return !length;
+	        }
+
+	        object = Object(object);
+
+	        while (index--) {
+	          var data = matchData[index];
+
+	          if (noCustomizer && data[2] ? data[1] !== object[data[0]] : !(data[0] in object)) {
+	            return false;
+	          }
+	        }
+
+	        while (++index < length) {
+	          data = matchData[index];
+	          var key = data[0],
+	              objValue = object[key],
+	              srcValue = data[1];
 
-	          if (h3 === 64) {
-	            arr[ac] = String.fromCharCode(o1);
-	          } else if (h4 === 64) {
-	            arr[ac] = String.fromCharCode(o1, o2);
+	          if (noCustomizer && data[2]) {
+	            if (objValue === undefined$1 && !(key in object)) {
+	              return false;
+	            }
 	          } else {
-	            arr[ac] = String.fromCharCode(o1, o2, o3);
+	            var stack = new Stack();
+
+	            if (customizer) {
+	              var result = customizer(objValue, srcValue, key, object, source, stack);
+	            }
+
+	            if (!(result === undefined$1 ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack) : result)) {
+	              return false;
+	            }
 	          }
-	        } while (i < input.length);
+	        }
 
-	        dec = arr.join('');
-	        dec = (utf8) ? utf8Decode(dec) : dec;
+	        return true;
+	      }
+	      /**
+	       * The base implementation of `_.isNative` without bad shim checks.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a native function,
+	       *  else `false`.
+	       */
 
-	        return dec;
-	      };
 
-	      // set custom pad string
-	      this.setPad = function(str) {
-	        pad = str || pad;
-	        return this;
-	      };
-	      // set custom tab string characters
-	      this.setTab = function(str) {
-	        tab = str || tab;
-	        return this;
-	      };
-	      this.setUTF8 = function(bool) {
-	        if (typeof bool === 'boolean') {
-	          utf8 = bool;
+	      function baseIsNative(value) {
+	        if (!isObject(value) || isMasked(value)) {
+	          return false;
 	        }
-	        return this;
-	      };
-	    },
 
-	    /**
-	     * CRC-32 calculation
-	     * @member Hashes
-	     * @method CRC32
-	     * @static
-	     * @param {String} str Input String
-	     * @return {String}
-	     */
-	    CRC32: function(str) {
-	      var crc = 0,
-	        x = 0,
-	        y = 0,
-	        table, i, iTop;
-	      str = utf8Encode(str);
-
-	      table = [
-	        '00000000 77073096 EE0E612C 990951BA 076DC419 706AF48F E963A535 9E6495A3 0EDB8832 ',
-	        '79DCB8A4 E0D5E91E 97D2D988 09B64C2B 7EB17CBD E7B82D07 90BF1D91 1DB71064 6AB020F2 F3B97148 ',
-	        '84BE41DE 1ADAD47D 6DDDE4EB F4D4B551 83D385C7 136C9856 646BA8C0 FD62F97A 8A65C9EC 14015C4F ',
-	        '63066CD9 FA0F3D63 8D080DF5 3B6E20C8 4C69105E D56041E4 A2677172 3C03E4D1 4B04D447 D20D85FD ',
-	        'A50AB56B 35B5A8FA 42B2986C DBBBC9D6 ACBCF940 32D86CE3 45DF5C75 DCD60DCF ABD13D59 26D930AC ',
-	        '51DE003A C8D75180 BFD06116 21B4F4B5 56B3C423 CFBA9599 B8BDA50F 2802B89E 5F058808 C60CD9B2 ',
-	        'B10BE924 2F6F7C87 58684C11 C1611DAB B6662D3D 76DC4190 01DB7106 98D220BC EFD5102A 71B18589 ',
-	        '06B6B51F 9FBFE4A5 E8B8D433 7807C9A2 0F00F934 9609A88E E10E9818 7F6A0DBB 086D3D2D 91646C97 ',
-	        'E6635C01 6B6B51F4 1C6C6162 856530D8 F262004E 6C0695ED 1B01A57B 8208F4C1 F50FC457 65B0D9C6 ',
-	        '12B7E950 8BBEB8EA FCB9887C 62DD1DDF 15DA2D49 8CD37CF3 FBD44C65 4DB26158 3AB551CE A3BC0074 ',
-	        'D4BB30E2 4ADFA541 3DD895D7 A4D1C46D D3D6F4FB 4369E96A 346ED9FC AD678846 DA60B8D0 44042D73 ',
-	        '33031DE5 AA0A4C5F DD0D7CC9 5005713C 270241AA BE0B1010 C90C2086 5768B525 206F85B3 B966D409 ',
-	        'CE61E49F 5EDEF90E 29D9C998 B0D09822 C7D7A8B4 59B33D17 2EB40D81 B7BD5C3B C0BA6CAD EDB88320 ',
-	        '9ABFB3B6 03B6E20C 74B1D29A EAD54739 9DD277AF 04DB2615 73DC1683 E3630B12 94643B84 0D6D6A3E ',
-	        '7A6A5AA8 E40ECF0B 9309FF9D 0A00AE27 7D079EB1 F00F9344 8708A3D2 1E01F268 6906C2FE F762575D ',
-	        '806567CB 196C3671 6E6B06E7 FED41B76 89D32BE0 10DA7A5A 67DD4ACC F9B9DF6F 8EBEEFF9 17B7BE43 ',
-	        '60B08ED5 D6D6A3E8 A1D1937E 38D8C2C4 4FDFF252 D1BB67F1 A6BC5767 3FB506DD 48B2364B D80D2BDA ',
-	        'AF0A1B4C 36034AF6 41047A60 DF60EFC3 A867DF55 316E8EEF 4669BE79 CB61B38C BC66831A 256FD2A0 ',
-	        '5268E236 CC0C7795 BB0B4703 220216B9 5505262F C5BA3BBE B2BD0B28 2BB45A92 5CB36A04 C2D7FFA7 ',
-	        'B5D0CF31 2CD99E8B 5BDEAE1D 9B64C2B0 EC63F226 756AA39C 026D930A 9C0906A9 EB0E363F 72076785 ',
-	        '05005713 95BF4A82 E2B87A14 7BB12BAE 0CB61B38 92D28E9B E5D5BE0D 7CDCEFB7 0BDBDF21 86D3D2D4 ',
-	        'F1D4E242 68DDB3F8 1FDA836E 81BE16CD F6B9265B 6FB077E1 18B74777 88085AE6 FF0F6A70 66063BCA ',
-	        '11010B5C 8F659EFF F862AE69 616BFFD3 166CCF45 A00AE278 D70DD2EE 4E048354 3903B3C2 A7672661 ',
-	        'D06016F7 4969474D 3E6E77DB AED16A4A D9D65ADC 40DF0B66 37D83BF0 A9BCAE53 DEBB9EC5 47B2CF7F ',
-	        '30B5FFE9 BDBDF21C CABAC28A 53B39330 24B4A3A6 BAD03605 CDD70693 54DE5729 23D967BF B3667A2E ',
-	        'C4614AB8 5D681B02 2A6F2B94 B40BBE37 C30C8EA1 5A05DF1B 2D02EF8D'
-	      ].join('');
-
-	      crc = crc ^ (-1);
-	      for (i = 0, iTop = str.length; i < iTop; i += 1) {
-	        y = (crc ^ str.charCodeAt(i)) & 0xFF;
-	        x = '0x' + table.substr(y * 9, 8);
-	        crc = (crc >>> 8) ^ x;
-	      }
-	      // always return a positive number (that's what >>> 0 does)
-	      return (crc ^ (-1)) >>> 0;
-	    },
-	    /**
-	     * @member Hashes
-	     * @class MD5
-	     * @constructor
-	     * @param {Object} [config]
-	     *
-	     * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
-	     * Digest Algorithm, as defined in RFC 1321.
-	     * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
-	     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-	     * See <http://pajhome.org.uk/crypt/md5> for more infHashes.
-	     */
-	    MD5: function(options) {
+	        var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
+	        return pattern.test(toSource(value));
+	      }
 	      /**
-	       * Private config properties. You may need to tweak these to be compatible with
-	       * the server-side, but the defaults work in most cases.
-	       * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
+	       * The base implementation of `_.isRegExp` without Node.js optimizations.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
 	       */
-	      var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false, // hexadecimal output case format. false - lowercase; true - uppercase
-	        b64pad = (options && typeof options.pad === 'string') ? options.pad : '=', // base-64 pad character. Defaults to '=' for strict RFC compliance
-	        utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true; // enable/disable utf8 encoding
 
-	      // privileged (public) methods
-	      this.hex = function(s) {
-	        return rstr2hex(rstr(s), hexcase);
-	      };
-	      this.b64 = function(s) {
-	        return rstr2b64(rstr(s), b64pad);
-	      };
-	      this.any = function(s, e) {
-	        return rstr2any(rstr(s), e);
-	      };
-	      this.raw = function(s) {
-	        return rstr(s);
-	      };
-	      this.hex_hmac = function(k, d) {
-	        return rstr2hex(rstr_hmac(k, d), hexcase);
-	      };
-	      this.b64_hmac = function(k, d) {
-	        return rstr2b64(rstr_hmac(k, d), b64pad);
-	      };
-	      this.any_hmac = function(k, d, e) {
-	        return rstr2any(rstr_hmac(k, d), e);
-	      };
+
+	      function baseIsRegExp(value) {
+	        return isObjectLike(value) && baseGetTag(value) == regexpTag;
+	      }
 	      /**
-	       * Perform a simple self-test to see if the VM is working
-	       * @return {String} Hexadecimal hash sample
+	       * The base implementation of `_.isSet` without Node.js optimizations.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a set, else `false`.
 	       */
-	      this.vm_test = function() {
-	        return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	      };
+
+
+	      function baseIsSet(value) {
+	        return isObjectLike(value) && getTag(value) == setTag;
+	      }
 	      /**
-	       * Enable/disable uppercase hexadecimal returned string
-	       * @param {Boolean}
-	       * @return {Object} this
+	       * The base implementation of `_.isTypedArray` without Node.js optimizations.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
 	       */
-	      this.setUpperCase = function(a) {
-	        if (typeof a === 'boolean') {
-	          hexcase = a;
-	        }
-	        return this;
-	      };
+
+
+	      function baseIsTypedArray(value) {
+	        return isObjectLike(value) && isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
+	      }
 	      /**
-	       * Defines a base64 pad string
-	       * @param {String} Pad
-	       * @return {Object} this
+	       * The base implementation of `_.iteratee`.
+	       *
+	       * @private
+	       * @param {*} [value=_.identity] The value to convert to an iteratee.
+	       * @returns {Function} Returns the iteratee.
 	       */
-	      this.setPad = function(a) {
-	        b64pad = a || b64pad;
-	        return this;
-	      };
+
+
+	      function baseIteratee(value) {
+	        // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+	        // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+	        if (typeof value == 'function') {
+	          return value;
+	        }
+
+	        if (value == null) {
+	          return identity;
+	        }
+
+	        if (_typeof(value) == 'object') {
+	          return isArray(value) ? baseMatchesProperty(value[0], value[1]) : baseMatches(value);
+	        }
+
+	        return property(value);
+	      }
 	      /**
-	       * Defines a base64 pad string
-	       * @param {Boolean}
-	       * @return {Object} [this]
+	       * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property names.
 	       */
-	      this.setUTF8 = function(a) {
-	        if (typeof a === 'boolean') {
-	          utf8 = a;
+
+
+	      function baseKeys(object) {
+	        if (!isPrototype(object)) {
+	          return nativeKeys(object);
 	        }
-	        return this;
-	      };
 
-	      // private methods
-
-	      /**
-	       * Calculate the MD5 of a raw string
-	       */
-
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binl2rstr(binl(rstr2binl(s), s.length * 8));
-	      }
-
-	      /**
-	       * Calculate the HMAC-MD5, of a key and some data (raw strings)
-	       */
-
-	      function rstr_hmac(key, data) {
-	        var bkey, ipad, opad, hash, i;
-
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
-	        bkey = rstr2binl(key);
-	        if (bkey.length > 16) {
-	          bkey = binl(bkey, key.length * 8);
-	        }
-
-	        ipad = Array(16), opad = Array(16);
-	        for (i = 0; i < 16; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	        }
-	        hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
-	        return binl2rstr(binl(opad.concat(hash), 512 + 128));
-	      }
-
-	      /**
-	       * Calculate the MD5 of an array of little-endian words, and a bit length.
-	       */
-
-	      function binl(x, len) {
-	        var i, olda, oldb, oldc, oldd,
-	          a = 1732584193,
-	          b = -271733879,
-	          c = -1732584194,
-	          d = 271733878;
+	        var result = [];
+
+	        for (var key in Object(object)) {
+	          if (hasOwnProperty.call(object, key) && key != 'constructor') {
+	            result.push(key);
+	          }
+	        }
 
-	        /* append padding */
-	        x[len >> 5] |= 0x80 << ((len) % 32);
-	        x[(((len + 64) >>> 9) << 4) + 14] = len;
+	        return result;
+	      }
+	      /**
+	       * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property names.
+	       */
 
-	        for (i = 0; i < x.length; i += 16) {
-	          olda = a;
-	          oldb = b;
-	          oldc = c;
-	          oldd = d;
 
-	          a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
-	          d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
-	          c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
-	          b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
-	          a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
-	          d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
-	          c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
-	          b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
-	          a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
-	          d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
-	          c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
-	          b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
-	          a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
-	          d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
-	          c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
-	          b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
+	      function baseKeysIn(object) {
+	        if (!isObject(object)) {
+	          return nativeKeysIn(object);
+	        }
 
-	          a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
-	          d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
-	          c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
-	          b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
-	          a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
-	          d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
-	          c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
-	          b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
-	          a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
-	          d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
-	          c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
-	          b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
-	          a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
-	          d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
-	          c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
-	          b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
+	        var isProto = isPrototype(object),
+	            result = [];
 
-	          a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
-	          d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
-	          c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
-	          b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
-	          a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
-	          d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
-	          c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
-	          b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
-	          a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
-	          d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
-	          c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
-	          b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
-	          a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
-	          d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
-	          c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
-	          b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
+	        for (var key in object) {
+	          if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
+	            result.push(key);
+	          }
+	        }
 
-	          a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
-	          d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
-	          c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
-	          b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
-	          a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
-	          d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
-	          c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
-	          b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
-	          a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
-	          d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
-	          c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
-	          b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
-	          a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
-	          d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
-	          c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
-	          b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
-
-	          a = safe_add(a, olda);
-	          b = safe_add(b, oldb);
-	          c = safe_add(c, oldc);
-	          d = safe_add(d, oldd);
-	        }
-	        return Array(a, b, c, d);
-	      }
-
-	      /**
-	       * These functions implement the four basic operations the algorithm uses.
-	       */
-
-	      function md5_cmn(q, a, b, x, s, t) {
-	        return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
-	      }
-
-	      function md5_ff(a, b, c, d, x, s, t) {
-	        return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
-	      }
-
-	      function md5_gg(a, b, c, d, x, s, t) {
-	        return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
-	      }
-
-	      function md5_hh(a, b, c, d, x, s, t) {
-	        return md5_cmn(b ^ c ^ d, a, b, x, s, t);
-	      }
-
-	      function md5_ii(a, b, c, d, x, s, t) {
-	        return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
+	        return result;
 	      }
-	    },
-	    /**
-	     * @member Hashes
-	     * @class Hashes.SHA1
-	     * @param {Object} [config]
-	     * @constructor
-	     *
-	     * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined in FIPS 180-1
-	     * Version 2.2 Copyright Paul Johnston 2000 - 2009.
-	     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-	     * See http://pajhome.org.uk/crypt/md5 for details.
-	     */
-	    SHA1: function(options) {
 	      /**
-	       * Private config properties. You may need to tweak these to be compatible with
-	       * the server-side, but the defaults work in most cases.
-	       * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
+	       * The base implementation of `_.lt` which doesn't coerce arguments.
+	       *
+	       * @private
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if `value` is less than `other`,
+	       *  else `false`.
 	       */
-	      var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false, // hexadecimal output case format. false - lowercase; true - uppercase
-	        b64pad = (options && typeof options.pad === 'string') ? options.pad : '=', // base-64 pad character. Defaults to '=' for strict RFC compliance
-	        utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true; // enable/disable utf8 encoding
 
-	      // public methods
-	      this.hex = function(s) {
-	        return rstr2hex(rstr(s), hexcase);
-	      };
-	      this.b64 = function(s) {
-	        return rstr2b64(rstr(s), b64pad);
-	      };
-	      this.any = function(s, e) {
-	        return rstr2any(rstr(s), e);
-	      };
-	      this.raw = function(s) {
-	        return rstr(s);
-	      };
-	      this.hex_hmac = function(k, d) {
-	        return rstr2hex(rstr_hmac(k, d));
-	      };
-	      this.b64_hmac = function(k, d) {
-	        return rstr2b64(rstr_hmac(k, d), b64pad);
-	      };
-	      this.any_hmac = function(k, d, e) {
-	        return rstr2any(rstr_hmac(k, d), e);
-	      };
+
+	      function baseLt(value, other) {
+	        return value < other;
+	      }
 	      /**
-	       * Perform a simple self-test to see if the VM is working
-	       * @return {String} Hexadecimal hash sample
-	       * @public
+	       * The base implementation of `_.map` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} iteratee The function invoked per iteration.
+	       * @returns {Array} Returns the new mapped array.
 	       */
-	      this.vm_test = function() {
-	        return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	      };
+
+
+	      function baseMap(collection, iteratee) {
+	        var index = -1,
+	            result = isArrayLike(collection) ? Array(collection.length) : [];
+	        baseEach(collection, function (value, key, collection) {
+	          result[++index] = iteratee(value, key, collection);
+	        });
+	        return result;
+	      }
 	      /**
-	       * @description Enable/disable uppercase hexadecimal returned string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
+	       * The base implementation of `_.matches` which doesn't clone `source`.
+	       *
+	       * @private
+	       * @param {Object} source The object of property values to match.
+	       * @returns {Function} Returns the new spec function.
 	       */
-	      this.setUpperCase = function(a) {
-	        if (typeof a === 'boolean') {
-	          hexcase = a;
+
+
+	      function baseMatches(source) {
+	        var matchData = getMatchData(source);
+
+	        if (matchData.length == 1 && matchData[0][2]) {
+	          return matchesStrictComparable(matchData[0][0], matchData[0][1]);
 	        }
-	        return this;
-	      };
+
+	        return function (object) {
+	          return object === source || baseIsMatch(object, source, matchData);
+	        };
+	      }
 	      /**
-	       * @description Defines a base64 pad string
-	       * @param {string} Pad
-	       * @return {Object} this
-	       * @public
+	       * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+	       *
+	       * @private
+	       * @param {string} path The path of the property to get.
+	       * @param {*} srcValue The value to match.
+	       * @returns {Function} Returns the new spec function.
 	       */
-	      this.setPad = function(a) {
-	        b64pad = a || b64pad;
-	        return this;
-	      };
+
+
+	      function baseMatchesProperty(path, srcValue) {
+	        if (isKey(path) && isStrictComparable(srcValue)) {
+	          return matchesStrictComparable(toKey(path), srcValue);
+	        }
+
+	        return function (object) {
+	          var objValue = get(object, path);
+	          return objValue === undefined$1 && objValue === srcValue ? hasIn(object, path) : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);
+	        };
+	      }
 	      /**
-	       * @description Defines a base64 pad string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
+	       * The base implementation of `_.merge` without support for multiple sources.
+	       *
+	       * @private
+	       * @param {Object} object The destination object.
+	       * @param {Object} source The source object.
+	       * @param {number} srcIndex The index of `source`.
+	       * @param {Function} [customizer] The function to customize merged values.
+	       * @param {Object} [stack] Tracks traversed source values and their merged
+	       *  counterparts.
 	       */
-	      this.setUTF8 = function(a) {
-	        if (typeof a === 'boolean') {
-	          utf8 = a;
+
+
+	      function baseMerge(object, source, srcIndex, customizer, stack) {
+	        if (object === source) {
+	          return;
 	        }
-	        return this;
-	      };
 
-	      // private methods
+	        baseFor(source, function (srcValue, key) {
+	          stack || (stack = new Stack());
+
+	          if (isObject(srcValue)) {
+	            baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
+	          } else {
+	            var newValue = customizer ? customizer(safeGet(object, key), srcValue, key + '', object, source, stack) : undefined$1;
+
+	            if (newValue === undefined$1) {
+	              newValue = srcValue;
+	            }
 
+	            assignMergeValue(object, key, newValue);
+	          }
+	        }, keysIn);
+	      }
 	      /**
-	       * Calculate the SHA-512 of a raw string
+	       * A specialized version of `baseMerge` for arrays and objects which performs
+	       * deep merges and tracks traversed objects enabling objects with circular
+	       * references to be merged.
+	       *
+	       * @private
+	       * @param {Object} object The destination object.
+	       * @param {Object} source The source object.
+	       * @param {string} key The key of the value to merge.
+	       * @param {number} srcIndex The index of `source`.
+	       * @param {Function} mergeFunc The function to merge values.
+	       * @param {Function} [customizer] The function to customize assigned values.
+	       * @param {Object} [stack] Tracks traversed source values and their merged
+	       *  counterparts.
 	       */
 
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binb2rstr(binb(rstr2binb(s), s.length * 8));
-	      }
 
+	      function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
+	        var objValue = safeGet(object, key),
+	            srcValue = safeGet(source, key),
+	            stacked = stack.get(srcValue);
+
+	        if (stacked) {
+	          assignMergeValue(object, key, stacked);
+	          return;
+	        }
+
+	        var newValue = customizer ? customizer(objValue, srcValue, key + '', object, source, stack) : undefined$1;
+	        var isCommon = newValue === undefined$1;
+
+	        if (isCommon) {
+	          var isArr = isArray(srcValue),
+	              isBuff = !isArr && isBuffer(srcValue),
+	              isTyped = !isArr && !isBuff && isTypedArray(srcValue);
+	          newValue = srcValue;
+
+	          if (isArr || isBuff || isTyped) {
+	            if (isArray(objValue)) {
+	              newValue = objValue;
+	            } else if (isArrayLikeObject(objValue)) {
+	              newValue = copyArray(objValue);
+	            } else if (isBuff) {
+	              isCommon = false;
+	              newValue = cloneBuffer(srcValue, true);
+	            } else if (isTyped) {
+	              isCommon = false;
+	              newValue = cloneTypedArray(srcValue, true);
+	            } else {
+	              newValue = [];
+	            }
+	          } else if (isPlainObject(srcValue) || isArguments(srcValue)) {
+	            newValue = objValue;
+
+	            if (isArguments(objValue)) {
+	              newValue = toPlainObject(objValue);
+	            } else if (!isObject(objValue) || isFunction(objValue)) {
+	              newValue = initCloneObject(srcValue);
+	            }
+	          } else {
+	            isCommon = false;
+	          }
+	        }
+
+	        if (isCommon) {
+	          // Recursively merge objects and arrays (susceptible to call stack limits).
+	          stack.set(srcValue, newValue);
+	          mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
+	          stack['delete'](srcValue);
+	        }
+
+	        assignMergeValue(object, key, newValue);
+	      }
 	      /**
-	       * Calculate the HMAC-SHA1 of a key and some data (raw strings)
+	       * The base implementation of `_.nth` which doesn't coerce arguments.
+	       *
+	       * @private
+	       * @param {Array} array The array to query.
+	       * @param {number} n The index of the element to return.
+	       * @returns {*} Returns the nth element of `array`.
 	       */
 
-	      function rstr_hmac(key, data) {
-	        var bkey, ipad, opad, i, hash;
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
-	        bkey = rstr2binb(key);
 
-	        if (bkey.length > 16) {
-	          bkey = binb(bkey, key.length * 8);
+	      function baseNth(array, n) {
+	        var length = array.length;
+
+	        if (!length) {
+	          return;
 	        }
-	        ipad = Array(16), opad = Array(16);
-	        for (i = 0; i < 16; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
+
+	        n += n < 0 ? length : 0;
+	        return isIndex(n, length) ? array[n] : undefined$1;
+	      }
+	      /**
+	       * The base implementation of `_.orderBy` without param guards.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
+	       * @param {string[]} orders The sort orders of `iteratees`.
+	       * @returns {Array} Returns the new sorted array.
+	       */
+
+
+	      function baseOrderBy(collection, iteratees, orders) {
+	        if (iteratees.length) {
+	          iteratees = arrayMap(iteratees, function (iteratee) {
+	            if (isArray(iteratee)) {
+	              return function (value) {
+	                return baseGet(value, iteratee.length === 1 ? iteratee[0] : iteratee);
+	              };
+	            }
+
+	            return iteratee;
+	          });
+	        } else {
+	          iteratees = [identity];
 	        }
-	        hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
-	        return binb2rstr(binb(opad.concat(hash), 512 + 160));
+
+	        var index = -1;
+	        iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
+	        var result = baseMap(collection, function (value, key, collection) {
+	          var criteria = arrayMap(iteratees, function (iteratee) {
+	            return iteratee(value);
+	          });
+	          return {
+	            'criteria': criteria,
+	            'index': ++index,
+	            'value': value
+	          };
+	        });
+	        return baseSortBy(result, function (object, other) {
+	          return compareMultiple(object, other, orders);
+	        });
 	      }
+	      /**
+	       * The base implementation of `_.pick` without support for individual
+	       * property identifiers.
+	       *
+	       * @private
+	       * @param {Object} object The source object.
+	       * @param {string[]} paths The property paths to pick.
+	       * @returns {Object} Returns the new object.
+	       */
 
+
+	      function basePick(object, paths) {
+	        return basePickBy(object, paths, function (value, path) {
+	          return hasIn(object, path);
+	        });
+	      }
 	      /**
-	       * Calculate the SHA-1 of an array of big-endian words, and a bit length
+	       * The base implementation of  `_.pickBy` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Object} object The source object.
+	       * @param {string[]} paths The property paths to pick.
+	       * @param {Function} predicate The function invoked per property.
+	       * @returns {Object} Returns the new object.
 	       */
 
-	      function binb(x, len) {
-	        var i, j, t, olda, oldb, oldc, oldd, olde,
-	          w = Array(80),
-	          a = 1732584193,
-	          b = -271733879,
-	          c = -1732584194,
-	          d = 271733878,
-	          e = -1009589776;
 
-	        /* append padding */
-	        x[len >> 5] |= 0x80 << (24 - len % 32);
-	        x[((len + 64 >> 9) << 4) + 15] = len;
+	      function basePickBy(object, paths, predicate) {
+	        var index = -1,
+	            length = paths.length,
+	            result = {};
 
-	        for (i = 0; i < x.length; i += 16) {
-	          olda = a;
-	          oldb = b;
-	          oldc = c;
-	          oldd = d;
-	          olde = e;
+	        while (++index < length) {
+	          var path = paths[index],
+	              value = baseGet(object, path);
 
-	          for (j = 0; j < 80; j += 1) {
-	            if (j < 16) {
-	              w[j] = x[i + j];
-	            } else {
-	              w[j] = bit_rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
-	            }
-	            t = safe_add(safe_add(bit_rol(a, 5), sha1_ft(j, b, c, d)),
-	              safe_add(safe_add(e, w[j]), sha1_kt(j)));
-	            e = d;
-	            d = c;
-	            c = bit_rol(b, 30);
-	            b = a;
-	            a = t;
+	          if (predicate(value, path)) {
+	            baseSet(result, castPath(path, object), value);
 	          }
-
-	          a = safe_add(a, olda);
-	          b = safe_add(b, oldb);
-	          c = safe_add(c, oldc);
-	          d = safe_add(d, oldd);
-	          e = safe_add(e, olde);
 	        }
-	        return Array(a, b, c, d, e);
+
+	        return result;
 	      }
+	      /**
+	       * A specialized version of `baseProperty` which supports deep paths.
+	       *
+	       * @private
+	       * @param {Array|string} path The path of the property to get.
+	       * @returns {Function} Returns the new accessor function.
+	       */
 
+
+	      function basePropertyDeep(path) {
+	        return function (object) {
+	          return baseGet(object, path);
+	        };
+	      }
 	      /**
-	       * Perform the appropriate triplet combination function for the current
-	       * iteration
+	       * The base implementation of `_.pullAllBy` without support for iteratee
+	       * shorthands.
+	       *
+	       * @private
+	       * @param {Array} array The array to modify.
+	       * @param {Array} values The values to remove.
+	       * @param {Function} [iteratee] The iteratee invoked per element.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns `array`.
 	       */
 
-	      function sha1_ft(t, b, c, d) {
-	        if (t < 20) {
-	          return (b & c) | ((~b) & d);
+
+	      function basePullAll(array, values, iteratee, comparator) {
+	        var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
+	            index = -1,
+	            length = values.length,
+	            seen = array;
+
+	        if (array === values) {
+	          values = copyArray(values);
 	        }
-	        if (t < 40) {
-	          return b ^ c ^ d;
+
+	        if (iteratee) {
+	          seen = arrayMap(array, baseUnary(iteratee));
 	        }
-	        if (t < 60) {
-	          return (b & c) | (b & d) | (c & d);
+
+	        while (++index < length) {
+	          var fromIndex = 0,
+	              value = values[index],
+	              computed = iteratee ? iteratee(value) : value;
+
+	          while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
+	            if (seen !== array) {
+	              splice.call(seen, fromIndex, 1);
+	            }
+
+	            splice.call(array, fromIndex, 1);
+	          }
 	        }
-	        return b ^ c ^ d;
-	      }
 
+	        return array;
+	      }
 	      /**
-	       * Determine the appropriate additive constant for the current iteration
+	       * The base implementation of `_.pullAt` without support for individual
+	       * indexes or capturing the removed elements.
+	       *
+	       * @private
+	       * @param {Array} array The array to modify.
+	       * @param {number[]} indexes The indexes of elements to remove.
+	       * @returns {Array} Returns `array`.
 	       */
 
-	      function sha1_kt(t) {
-	        return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 :
-	          (t < 60) ? -1894007588 : -899497514;
+
+	      function basePullAt(array, indexes) {
+	        var length = array ? indexes.length : 0,
+	            lastIndex = length - 1;
+
+	        while (length--) {
+	          var index = indexes[length];
+
+	          if (length == lastIndex || index !== previous) {
+	            var previous = index;
+
+	            if (isIndex(index)) {
+	              splice.call(array, index, 1);
+	            } else {
+	              baseUnset(array, index);
+	            }
+	          }
+	        }
+
+	        return array;
 	      }
-	    },
-	    /**
-	     * @class Hashes.SHA256
-	     * @param {config}
-	     *
-	     * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined in FIPS 180-2
-	     * Version 2.2 Copyright Angel Marin, Paul Johnston 2000 - 2009.
-	     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-	     * See http://pajhome.org.uk/crypt/md5 for details.
-	     * Also http://anmar.eu.org/projects/jssha2/
-	     */
-	    SHA256: function(options) {
 	      /**
-	       * Private properties configuration variables. You may need to tweak these to be compatible with
-	       * the server-side, but the defaults work in most cases.
-	       * @see this.setUpperCase() method
-	       * @see this.setPad() method
+	       * The base implementation of `_.random` without support for returning
+	       * floating-point numbers.
+	       *
+	       * @private
+	       * @param {number} lower The lower bound.
+	       * @param {number} upper The upper bound.
+	       * @returns {number} Returns the random number.
 	       */
-	      var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false, // hexadecimal output case format. false - lowercase; true - uppercase  */
-	        b64pad = (options && typeof options.pad === 'string') ? options.pad : '=',
-	        /* base-64 pad character. Default '=' for strict RFC compliance   */
-	        utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true,
-	        /* enable/disable utf8 encoding */
-	        sha256_K;
 
-	      /* privileged (public) methods */
-	      this.hex = function(s) {
-	        return rstr2hex(rstr(s, utf8));
-	      };
-	      this.b64 = function(s) {
-	        return rstr2b64(rstr(s, utf8), b64pad);
-	      };
-	      this.any = function(s, e) {
-	        return rstr2any(rstr(s, utf8), e);
-	      };
-	      this.raw = function(s) {
-	        return rstr(s, utf8);
-	      };
-	      this.hex_hmac = function(k, d) {
-	        return rstr2hex(rstr_hmac(k, d));
-	      };
-	      this.b64_hmac = function(k, d) {
-	        return rstr2b64(rstr_hmac(k, d), b64pad);
-	      };
-	      this.any_hmac = function(k, d, e) {
-	        return rstr2any(rstr_hmac(k, d), e);
-	      };
-	      /**
-	       * Perform a simple self-test to see if the VM is working
-	       * @return {String} Hexadecimal hash sample
-	       * @public
-	       */
-	      this.vm_test = function() {
-	        return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	      };
+
+	      function baseRandom(lower, upper) {
+	        return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
+	      }
 	      /**
-	       * Enable/disable uppercase hexadecimal returned string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
+	       * The base implementation of `_.range` and `_.rangeRight` which doesn't
+	       * coerce arguments.
+	       *
+	       * @private
+	       * @param {number} start The start of the range.
+	       * @param {number} end The end of the range.
+	       * @param {number} step The value to increment or decrement by.
+	       * @param {boolean} [fromRight] Specify iterating from right to left.
+	       * @returns {Array} Returns the range of numbers.
 	       */
-	      this.setUpperCase = function(a) {
-	        if (typeof a === 'boolean') {
-	          hexcase = a;
+
+
+	      function baseRange(start, end, step, fromRight) {
+	        var index = -1,
+	            length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
+	            result = Array(length);
+
+	        while (length--) {
+	          result[fromRight ? length : ++index] = start;
+	          start += step;
 	        }
-	        return this;
-	      };
+
+	        return result;
+	      }
 	      /**
-	       * @description Defines a base64 pad string
-	       * @param {string} Pad
-	       * @return {Object} this
-	       * @public
+	       * The base implementation of `_.repeat` which doesn't coerce arguments.
+	       *
+	       * @private
+	       * @param {string} string The string to repeat.
+	       * @param {number} n The number of times to repeat the string.
+	       * @returns {string} Returns the repeated string.
 	       */
-	      this.setPad = function(a) {
-	        b64pad = a || b64pad;
-	        return this;
-	      };
+
+
+	      function baseRepeat(string, n) {
+	        var result = '';
+
+	        if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
+	          return result;
+	        } // Leverage the exponentiation by squaring algorithm for a faster repeat.
+	        // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
+
+
+	        do {
+	          if (n % 2) {
+	            result += string;
+	          }
+
+	          n = nativeFloor(n / 2);
+
+	          if (n) {
+	            string += string;
+	          }
+	        } while (n);
+
+	        return result;
+	      }
 	      /**
-	       * Defines a base64 pad string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
+	       * The base implementation of `_.rest` which doesn't validate or coerce arguments.
+	       *
+	       * @private
+	       * @param {Function} func The function to apply a rest parameter to.
+	       * @param {number} [start=func.length-1] The start position of the rest parameter.
+	       * @returns {Function} Returns the new function.
 	       */
-	      this.setUTF8 = function(a) {
-	        if (typeof a === 'boolean') {
-	          utf8 = a;
-	        }
-	        return this;
-	      };
 
-	      // private methods
 
+	      function baseRest(func, start) {
+	        return setToString(overRest(func, start, identity), func + '');
+	      }
 	      /**
-	       * Calculate the SHA-512 of a raw string
+	       * The base implementation of `_.sample`.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to sample.
+	       * @returns {*} Returns the random element.
 	       */
 
-	      function rstr(s, utf8) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binb2rstr(binb(rstr2binb(s), s.length * 8));
+
+	      function baseSample(collection) {
+	        return arraySample(values(collection));
 	      }
+	      /**
+	       * The base implementation of `_.sampleSize` without param guards.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to sample.
+	       * @param {number} n The number of elements to sample.
+	       * @returns {Array} Returns the random elements.
+	       */
+
 
+	      function baseSampleSize(collection, n) {
+	        var array = values(collection);
+	        return shuffleSelf(array, baseClamp(n, 0, array.length));
+	      }
 	      /**
-	       * Calculate the HMAC-sha256 of a key and some data (raw strings)
+	       * The base implementation of `_.set`.
+	       *
+	       * @private
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The path of the property to set.
+	       * @param {*} value The value to set.
+	       * @param {Function} [customizer] The function to customize path creation.
+	       * @returns {Object} Returns `object`.
 	       */
 
-	      function rstr_hmac(key, data) {
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
-	        var hash, i = 0,
-	          bkey = rstr2binb(key),
-	          ipad = Array(16),
-	          opad = Array(16);
 
-	        if (bkey.length > 16) {
-	          bkey = binb(bkey, key.length * 8);
+	      function baseSet(object, path, value, customizer) {
+	        if (!isObject(object)) {
+	          return object;
 	        }
 
-	        for (; i < 16; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	        path = castPath(path, object);
+	        var index = -1,
+	            length = path.length,
+	            lastIndex = length - 1,
+	            nested = object;
+
+	        while (nested != null && ++index < length) {
+	          var key = toKey(path[index]),
+	              newValue = value;
+
+	          if (key === '__proto__' || key === 'constructor' || key === 'prototype') {
+	            return object;
+	          }
+
+	          if (index != lastIndex) {
+	            var objValue = nested[key];
+	            newValue = customizer ? customizer(objValue, key, nested) : undefined$1;
+
+	            if (newValue === undefined$1) {
+	              newValue = isObject(objValue) ? objValue : isIndex(path[index + 1]) ? [] : {};
+	            }
+	          }
+
+	          assignValue(nested, key, newValue);
+	          nested = nested[key];
 	        }
 
-	        hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
-	        return binb2rstr(binb(opad.concat(hash), 512 + 256));
+	        return object;
 	      }
+	      /**
+	       * The base implementation of `setData` without support for hot loop shorting.
+	       *
+	       * @private
+	       * @param {Function} func The function to associate metadata with.
+	       * @param {*} data The metadata.
+	       * @returns {Function} Returns `func`.
+	       */
+
+
+	      var baseSetData = !metaMap ? identity : function (func, data) {
+	        metaMap.set(func, data);
+	        return func;
+	      };
+	      /**
+	       * The base implementation of `setToString` without support for hot loop shorting.
+	       *
+	       * @private
+	       * @param {Function} func The function to modify.
+	       * @param {Function} string The `toString` result.
+	       * @returns {Function} Returns `func`.
+	       */
 
-	      /*
-	       * Main sha256 function, with its support functions
+	      var baseSetToString = !defineProperty ? identity : function (func, string) {
+	        return defineProperty(func, 'toString', {
+	          'configurable': true,
+	          'enumerable': false,
+	          'value': constant(string),
+	          'writable': true
+	        });
+	      };
+	      /**
+	       * The base implementation of `_.shuffle`.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to shuffle.
+	       * @returns {Array} Returns the new shuffled array.
 	       */
 
-	      function sha256_S(X, n) {
-	        return (X >>> n) | (X << (32 - n));
+	      function baseShuffle(collection) {
+	        return shuffleSelf(values(collection));
 	      }
+	      /**
+	       * The base implementation of `_.slice` without an iteratee call guard.
+	       *
+	       * @private
+	       * @param {Array} array The array to slice.
+	       * @param {number} [start=0] The start position.
+	       * @param {number} [end=array.length] The end position.
+	       * @returns {Array} Returns the slice of `array`.
+	       */
 
-	      function sha256_R(X, n) {
-	        return (X >>> n);
-	      }
 
-	      function sha256_Ch(x, y, z) {
-	        return ((x & y) ^ ((~x) & z));
-	      }
+	      function baseSlice(array, start, end) {
+	        var index = -1,
+	            length = array.length;
 
-	      function sha256_Maj(x, y, z) {
-	        return ((x & y) ^ (x & z) ^ (y & z));
-	      }
+	        if (start < 0) {
+	          start = -start > length ? 0 : length + start;
+	        }
 
-	      function sha256_Sigma0256(x) {
-	        return (sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22));
-	      }
+	        end = end > length ? length : end;
 
-	      function sha256_Sigma1256(x) {
-	        return (sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25));
-	      }
+	        if (end < 0) {
+	          end += length;
+	        }
+
+	        length = start > end ? 0 : end - start >>> 0;
+	        start >>>= 0;
+	        var result = Array(length);
+
+	        while (++index < length) {
+	          result[index] = array[index + start];
+	        }
 
-	      function sha256_Gamma0256(x) {
-	        return (sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3));
+	        return result;
 	      }
+	      /**
+	       * The base implementation of `_.some` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} predicate The function invoked per iteration.
+	       * @returns {boolean} Returns `true` if any element passes the predicate check,
+	       *  else `false`.
+	       */
 
-	      function sha256_Gamma1256(x) {
-	        return (sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10));
+
+	      function baseSome(collection, predicate) {
+	        var result;
+	        baseEach(collection, function (value, index, collection) {
+	          result = predicate(value, index, collection);
+	          return !result;
+	        });
+	        return !!result;
 	      }
+	      /**
+	       * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
+	       * performs a binary search of `array` to determine the index at which `value`
+	       * should be inserted into `array` in order to maintain its sort order.
+	       *
+	       * @private
+	       * @param {Array} array The sorted array to inspect.
+	       * @param {*} value The value to evaluate.
+	       * @param {boolean} [retHighest] Specify returning the highest qualified index.
+	       * @returns {number} Returns the index at which `value` should be inserted
+	       *  into `array`.
+	       */
 
-	      sha256_K = [
-	        1116352408, 1899447441, -1245643825, -373957723, 961987163, 1508970993, -1841331548, -1424204075, -670586216, 310598401, 607225278, 1426881987,
-	        1925078388, -2132889090, -1680079193, -1046744716, -459576895, -272742522,
-	        264347078, 604807628, 770255983, 1249150122, 1555081692, 1996064986, -1740746414, -1473132947, -1341970488, -1084653625, -958395405, -710438585,
-	        113926993, 338241895, 666307205, 773529912, 1294757372, 1396182291,
-	        1695183700, 1986661051, -2117940946, -1838011259, -1564481375, -1474664885, -1035236496, -949202525, -778901479, -694614492, -200395387, 275423344,
-	        430227734, 506948616, 659060556, 883997877, 958139571, 1322822218,
-	        1537002063, 1747873779, 1955562222, 2024104815, -2067236844, -1933114872, -1866530822, -1538233109, -1090935817, -965641998
-	      ];
 
-	      function binb(m, l) {
-	        var HASH = [1779033703, -1150833019, 1013904242, -1521486534,
-	          1359893119, -1694144372, 528734635, 1541459225
-	        ];
-	        var W = new Array(64);
-	        var a, b, c, d, e, f, g, h;
-	        var i, j, T1, T2;
-
-	        /* append padding */
-	        m[l >> 5] |= 0x80 << (24 - l % 32);
-	        m[((l + 64 >> 9) << 4) + 15] = l;
-
-	        for (i = 0; i < m.length; i += 16) {
-	          a = HASH[0];
-	          b = HASH[1];
-	          c = HASH[2];
-	          d = HASH[3];
-	          e = HASH[4];
-	          f = HASH[5];
-	          g = HASH[6];
-	          h = HASH[7];
-
-	          for (j = 0; j < 64; j += 1) {
-	            if (j < 16) {
-	              W[j] = m[j + i];
+	      function baseSortedIndex(array, value, retHighest) {
+	        var low = 0,
+	            high = array == null ? low : array.length;
+
+	        if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
+	          while (low < high) {
+	            var mid = low + high >>> 1,
+	                computed = array[mid];
+
+	            if (computed !== null && !isSymbol(computed) && (retHighest ? computed <= value : computed < value)) {
+	              low = mid + 1;
 	            } else {
-	              W[j] = safe_add(safe_add(safe_add(sha256_Gamma1256(W[j - 2]), W[j - 7]),
-	                sha256_Gamma0256(W[j - 15])), W[j - 16]);
+	              high = mid;
 	            }
-
-	            T1 = safe_add(safe_add(safe_add(safe_add(h, sha256_Sigma1256(e)), sha256_Ch(e, f, g)),
-	              sha256_K[j]), W[j]);
-	            T2 = safe_add(sha256_Sigma0256(a), sha256_Maj(a, b, c));
-	            h = g;
-	            g = f;
-	            f = e;
-	            e = safe_add(d, T1);
-	            d = c;
-	            c = b;
-	            b = a;
-	            a = safe_add(T1, T2);
 	          }
 
-	          HASH[0] = safe_add(a, HASH[0]);
-	          HASH[1] = safe_add(b, HASH[1]);
-	          HASH[2] = safe_add(c, HASH[2]);
-	          HASH[3] = safe_add(d, HASH[3]);
-	          HASH[4] = safe_add(e, HASH[4]);
-	          HASH[5] = safe_add(f, HASH[5]);
-	          HASH[6] = safe_add(g, HASH[6]);
-	          HASH[7] = safe_add(h, HASH[7]);
+	          return high;
 	        }
-	        return HASH;
-	      }
-
-	    },
 
-	    /**
-	     * @class Hashes.SHA512
-	     * @param {config}
-	     *
-	     * A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined in FIPS 180-2
-	     * Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009.
-	     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-	     * See http://pajhome.org.uk/crypt/md5 for details.
-	     */
-	    SHA512: function(options) {
+	        return baseSortedIndexBy(array, value, identity, retHighest);
+	      }
 	      /**
-	       * Private properties configuration variables. You may need to tweak these to be compatible with
-	       * the server-side, but the defaults work in most cases.
-	       * @see this.setUpperCase() method
-	       * @see this.setPad() method
+	       * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
+	       * which invokes `iteratee` for `value` and each element of `array` to compute
+	       * their sort ranking. The iteratee is invoked with one argument; (value).
+	       *
+	       * @private
+	       * @param {Array} array The sorted array to inspect.
+	       * @param {*} value The value to evaluate.
+	       * @param {Function} iteratee The iteratee invoked per element.
+	       * @param {boolean} [retHighest] Specify returning the highest qualified index.
+	       * @returns {number} Returns the index at which `value` should be inserted
+	       *  into `array`.
 	       */
-	      var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false,
-	        /* hexadecimal output case format. false - lowercase; true - uppercase  */
-	        b64pad = (options && typeof options.pad === 'string') ? options.pad : '=',
-	        /* base-64 pad character. Default '=' for strict RFC compliance   */
-	        utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true,
-	        /* enable/disable utf8 encoding */
-	        sha512_k;
 
-	      /* privileged (public) methods */
-	      this.hex = function(s) {
-	        return rstr2hex(rstr(s));
-	      };
-	      this.b64 = function(s) {
-	        return rstr2b64(rstr(s), b64pad);
-	      };
-	      this.any = function(s, e) {
-	        return rstr2any(rstr(s), e);
-	      };
-	      this.raw = function(s) {
-	        return rstr(s);
-	      };
-	      this.hex_hmac = function(k, d) {
-	        return rstr2hex(rstr_hmac(k, d));
-	      };
-	      this.b64_hmac = function(k, d) {
-	        return rstr2b64(rstr_hmac(k, d), b64pad);
-	      };
-	      this.any_hmac = function(k, d, e) {
-	        return rstr2any(rstr_hmac(k, d), e);
-	      };
-	      /**
-	       * Perform a simple self-test to see if the VM is working
-	       * @return {String} Hexadecimal hash sample
-	       * @public
-	       */
-	      this.vm_test = function() {
-	        return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	      };
+
+	      function baseSortedIndexBy(array, value, iteratee, retHighest) {
+	        var low = 0,
+	            high = array == null ? 0 : array.length;
+
+	        if (high === 0) {
+	          return 0;
+	        }
+
+	        value = iteratee(value);
+	        var valIsNaN = value !== value,
+	            valIsNull = value === null,
+	            valIsSymbol = isSymbol(value),
+	            valIsUndefined = value === undefined$1;
+
+	        while (low < high) {
+	          var mid = nativeFloor((low + high) / 2),
+	              computed = iteratee(array[mid]),
+	              othIsDefined = computed !== undefined$1,
+	              othIsNull = computed === null,
+	              othIsReflexive = computed === computed,
+	              othIsSymbol = isSymbol(computed);
+
+	          if (valIsNaN) {
+	            var setLow = retHighest || othIsReflexive;
+	          } else if (valIsUndefined) {
+	            setLow = othIsReflexive && (retHighest || othIsDefined);
+	          } else if (valIsNull) {
+	            setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
+	          } else if (valIsSymbol) {
+	            setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
+	          } else if (othIsNull || othIsSymbol) {
+	            setLow = false;
+	          } else {
+	            setLow = retHighest ? computed <= value : computed < value;
+	          }
+
+	          if (setLow) {
+	            low = mid + 1;
+	          } else {
+	            high = mid;
+	          }
+	        }
+
+	        return nativeMin(high, MAX_ARRAY_INDEX);
+	      }
 	      /**
-	       * @description Enable/disable uppercase hexadecimal returned string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
+	       * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without
+	       * support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array} array The array to inspect.
+	       * @param {Function} [iteratee] The iteratee invoked per element.
+	       * @returns {Array} Returns the new duplicate free array.
 	       */
-	      this.setUpperCase = function(a) {
-	        if (typeof a === 'boolean') {
-	          hexcase = a;
+
+
+	      function baseSortedUniq(array, iteratee) {
+	        var index = -1,
+	            length = array.length,
+	            resIndex = 0,
+	            result = [];
+
+	        while (++index < length) {
+	          var value = array[index],
+	              computed = iteratee ? iteratee(value) : value;
+
+	          if (!index || !eq(computed, seen)) {
+	            var seen = computed;
+	            result[resIndex++] = value === 0 ? 0 : value;
+	          }
 	        }
-	        return this;
-	      };
+
+	        return result;
+	      }
 	      /**
-	       * @description Defines a base64 pad string
-	       * @param {string} Pad
-	       * @return {Object} this
-	       * @public
+	       * The base implementation of `_.toNumber` which doesn't ensure correct
+	       * conversions of binary, hexadecimal, or octal string values.
+	       *
+	       * @private
+	       * @param {*} value The value to process.
+	       * @returns {number} Returns the number.
 	       */
-	      this.setPad = function(a) {
-	        b64pad = a || b64pad;
-	        return this;
-	      };
+
+
+	      function baseToNumber(value) {
+	        if (typeof value == 'number') {
+	          return value;
+	        }
+
+	        if (isSymbol(value)) {
+	          return NAN;
+	        }
+
+	        return +value;
+	      }
 	      /**
-	       * @description Defines a base64 pad string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
+	       * The base implementation of `_.toString` which doesn't convert nullish
+	       * values to empty strings.
+	       *
+	       * @private
+	       * @param {*} value The value to process.
+	       * @returns {string} Returns the string.
 	       */
-	      this.setUTF8 = function(a) {
-	        if (typeof a === 'boolean') {
-	          utf8 = a;
+
+
+	      function baseToString(value) {
+	        // Exit early for strings to avoid a performance hit in some environments.
+	        if (typeof value == 'string') {
+	          return value;
+	        }
+
+	        if (isArray(value)) {
+	          // Recursively convert values (susceptible to call stack limits).
+	          return arrayMap(value, baseToString) + '';
 	        }
-	        return this;
-	      };
 
-	      /* private methods */
+	        if (isSymbol(value)) {
+	          return symbolToString ? symbolToString.call(value) : '';
+	        }
 
+	        var result = value + '';
+	        return result == '0' && 1 / value == -INFINITY ? '-0' : result;
+	      }
 	      /**
-	       * Calculate the SHA-512 of a raw string
+	       * The base implementation of `_.uniqBy` without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array} array The array to inspect.
+	       * @param {Function} [iteratee] The iteratee invoked per element.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new duplicate free array.
 	       */
 
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binb2rstr(binb(rstr2binb(s), s.length * 8));
-	      }
-	      /*
-	       * Calculate the HMAC-SHA-512 of a key and some data (raw strings)
-	       */
 
-	      function rstr_hmac(key, data) {
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
+	      function baseUniq(array, iteratee, comparator) {
+	        var index = -1,
+	            includes = arrayIncludes,
+	            length = array.length,
+	            isCommon = true,
+	            result = [],
+	            seen = result;
+
+	        if (comparator) {
+	          isCommon = false;
+	          includes = arrayIncludesWith;
+	        } else if (length >= LARGE_ARRAY_SIZE) {
+	          var set = iteratee ? null : createSet(array);
 
-	        var hash, i = 0,
-	          bkey = rstr2binb(key),
-	          ipad = Array(32),
-	          opad = Array(32);
+	          if (set) {
+	            return setToArray(set);
+	          }
 
-	        if (bkey.length > 32) {
-	          bkey = binb(bkey, key.length * 8);
+	          isCommon = false;
+	          includes = cacheHas;
+	          seen = new SetCache();
+	        } else {
+	          seen = iteratee ? [] : result;
 	        }
 
-	        for (; i < 32; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	        outer: while (++index < length) {
+	          var value = array[index],
+	              computed = iteratee ? iteratee(value) : value;
+	          value = comparator || value !== 0 ? value : 0;
+
+	          if (isCommon && computed === computed) {
+	            var seenIndex = seen.length;
+
+	            while (seenIndex--) {
+	              if (seen[seenIndex] === computed) {
+	                continue outer;
+	              }
+	            }
+
+	            if (iteratee) {
+	              seen.push(computed);
+	            }
+
+	            result.push(value);
+	          } else if (!includes(seen, computed, comparator)) {
+	            if (seen !== result) {
+	              seen.push(computed);
+	            }
+
+	            result.push(value);
+	          }
 	        }
 
-	        hash = binb(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
-	        return binb2rstr(binb(opad.concat(hash), 1024 + 512));
+	        return result;
 	      }
-
 	      /**
-	       * Calculate the SHA-512 of an array of big-endian dwords, and a bit length
+	       * The base implementation of `_.unset`.
+	       *
+	       * @private
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The property path to unset.
+	       * @returns {boolean} Returns `true` if the property is deleted, else `false`.
 	       */
 
-	      function binb(x, len) {
-	        var j, i, l,
-	          W = new Array(80),
-	          hash = new Array(16),
-	          //Initial hash values
-	          H = [
-	            new int64(0x6a09e667, -205731576),
-	            new int64(-1150833019, -2067093701),
-	            new int64(0x3c6ef372, -23791573),
-	            new int64(-1521486534, 0x5f1d36f1),
-	            new int64(0x510e527f, -1377402159),
-	            new int64(-1694144372, 0x2b3e6c1f),
-	            new int64(0x1f83d9ab, -79577749),
-	            new int64(0x5be0cd19, 0x137e2179)
-	          ],
-	          T1 = new int64(0, 0),
-	          T2 = new int64(0, 0),
-	          a = new int64(0, 0),
-	          b = new int64(0, 0),
-	          c = new int64(0, 0),
-	          d = new int64(0, 0),
-	          e = new int64(0, 0),
-	          f = new int64(0, 0),
-	          g = new int64(0, 0),
-	          h = new int64(0, 0),
-	          //Temporary variables not specified by the document
-	          s0 = new int64(0, 0),
-	          s1 = new int64(0, 0),
-	          Ch = new int64(0, 0),
-	          Maj = new int64(0, 0),
-	          r1 = new int64(0, 0),
-	          r2 = new int64(0, 0),
-	          r3 = new int64(0, 0);
-
-	        if (sha512_k === undefined) {
-	          //SHA512 constants
-	          sha512_k = [
-	            new int64(0x428a2f98, -685199838), new int64(0x71374491, 0x23ef65cd),
-	            new int64(-1245643825, -330482897), new int64(-373957723, -2121671748),
-	            new int64(0x3956c25b, -213338824), new int64(0x59f111f1, -1241133031),
-	            new int64(-1841331548, -1357295717), new int64(-1424204075, -630357736),
-	            new int64(-670586216, -1560083902), new int64(0x12835b01, 0x45706fbe),
-	            new int64(0x243185be, 0x4ee4b28c), new int64(0x550c7dc3, -704662302),
-	            new int64(0x72be5d74, -226784913), new int64(-2132889090, 0x3b1696b1),
-	            new int64(-1680079193, 0x25c71235), new int64(-1046744716, -815192428),
-	            new int64(-459576895, -1628353838), new int64(-272742522, 0x384f25e3),
-	            new int64(0xfc19dc6, -1953704523), new int64(0x240ca1cc, 0x77ac9c65),
-	            new int64(0x2de92c6f, 0x592b0275), new int64(0x4a7484aa, 0x6ea6e483),
-	            new int64(0x5cb0a9dc, -1119749164), new int64(0x76f988da, -2096016459),
-	            new int64(-1740746414, -295247957), new int64(-1473132947, 0x2db43210),
-	            new int64(-1341970488, -1728372417), new int64(-1084653625, -1091629340),
-	            new int64(-958395405, 0x3da88fc2), new int64(-710438585, -1828018395),
-	            new int64(0x6ca6351, -536640913), new int64(0x14292967, 0xa0e6e70),
-	            new int64(0x27b70a85, 0x46d22ffc), new int64(0x2e1b2138, 0x5c26c926),
-	            new int64(0x4d2c6dfc, 0x5ac42aed), new int64(0x53380d13, -1651133473),
-	            new int64(0x650a7354, -1951439906), new int64(0x766a0abb, 0x3c77b2a8),
-	            new int64(-2117940946, 0x47edaee6), new int64(-1838011259, 0x1482353b),
-	            new int64(-1564481375, 0x4cf10364), new int64(-1474664885, -1136513023),
-	            new int64(-1035236496, -789014639), new int64(-949202525, 0x654be30),
-	            new int64(-778901479, -688958952), new int64(-694614492, 0x5565a910),
-	            new int64(-200395387, 0x5771202a), new int64(0x106aa070, 0x32bbd1b8),
-	            new int64(0x19a4c116, -1194143544), new int64(0x1e376c08, 0x5141ab53),
-	            new int64(0x2748774c, -544281703), new int64(0x34b0bcb5, -509917016),
-	            new int64(0x391c0cb3, -976659869), new int64(0x4ed8aa4a, -482243893),
-	            new int64(0x5b9cca4f, 0x7763e373), new int64(0x682e6ff3, -692930397),
-	            new int64(0x748f82ee, 0x5defb2fc), new int64(0x78a5636f, 0x43172f60),
-	            new int64(-2067236844, -1578062990), new int64(-1933114872, 0x1a6439ec),
-	            new int64(-1866530822, 0x23631e28), new int64(-1538233109, -561857047),
-	            new int64(-1090935817, -1295615723), new int64(-965641998, -479046869),
-	            new int64(-903397682, -366583396), new int64(-779700025, 0x21c0c207),
-	            new int64(-354779690, -840897762), new int64(-176337025, -294727304),
-	            new int64(0x6f067aa, 0x72176fba), new int64(0xa637dc5, -1563912026),
-	            new int64(0x113f9804, -1090974290), new int64(0x1b710b35, 0x131c471b),
-	            new int64(0x28db77f5, 0x23047d84), new int64(0x32caab7b, 0x40c72493),
-	            new int64(0x3c9ebe0a, 0x15c9bebc), new int64(0x431d67c4, -1676669620),
-	            new int64(0x4cc5d4be, -885112138), new int64(0x597f299c, -60457430),
-	            new int64(0x5fcb6fab, 0x3ad6faec), new int64(0x6c44198c, 0x4a475817)
-	          ];
-	        }
-
-	        for (i = 0; i < 80; i += 1) {
-	          W[i] = new int64(0, 0);
-	        }
-
-	        // append padding to the source string. The format is described in the FIPS.
-	        x[len >> 5] |= 0x80 << (24 - (len & 0x1f));
-	        x[((len + 128 >> 10) << 5) + 31] = len;
-	        l = x.length;
-	        for (i = 0; i < l; i += 32) { //32 dwords is the block size
-	          int64copy(a, H[0]);
-	          int64copy(b, H[1]);
-	          int64copy(c, H[2]);
-	          int64copy(d, H[3]);
-	          int64copy(e, H[4]);
-	          int64copy(f, H[5]);
-	          int64copy(g, H[6]);
-	          int64copy(h, H[7]);
-
-	          for (j = 0; j < 16; j += 1) {
-	            W[j].h = x[i + 2 * j];
-	            W[j].l = x[i + 2 * j + 1];
-	          }
-
-	          for (j = 16; j < 80; j += 1) {
-	            //sigma1
-	            int64rrot(r1, W[j - 2], 19);
-	            int64revrrot(r2, W[j - 2], 29);
-	            int64shr(r3, W[j - 2], 6);
-	            s1.l = r1.l ^ r2.l ^ r3.l;
-	            s1.h = r1.h ^ r2.h ^ r3.h;
-	            //sigma0
-	            int64rrot(r1, W[j - 15], 1);
-	            int64rrot(r2, W[j - 15], 8);
-	            int64shr(r3, W[j - 15], 7);
-	            s0.l = r1.l ^ r2.l ^ r3.l;
-	            s0.h = r1.h ^ r2.h ^ r3.h;
-
-	            int64add4(W[j], s1, W[j - 7], s0, W[j - 16]);
-	          }
-
-	          for (j = 0; j < 80; j += 1) {
-	            //Ch
-	            Ch.l = (e.l & f.l) ^ (~e.l & g.l);
-	            Ch.h = (e.h & f.h) ^ (~e.h & g.h);
-
-	            //Sigma1
-	            int64rrot(r1, e, 14);
-	            int64rrot(r2, e, 18);
-	            int64revrrot(r3, e, 9);
-	            s1.l = r1.l ^ r2.l ^ r3.l;
-	            s1.h = r1.h ^ r2.h ^ r3.h;
-
-	            //Sigma0
-	            int64rrot(r1, a, 28);
-	            int64revrrot(r2, a, 2);
-	            int64revrrot(r3, a, 7);
-	            s0.l = r1.l ^ r2.l ^ r3.l;
-	            s0.h = r1.h ^ r2.h ^ r3.h;
-
-	            //Maj
-	            Maj.l = (a.l & b.l) ^ (a.l & c.l) ^ (b.l & c.l);
-	            Maj.h = (a.h & b.h) ^ (a.h & c.h) ^ (b.h & c.h);
-
-	            int64add5(T1, h, s1, Ch, sha512_k[j], W[j]);
-	            int64add(T2, s0, Maj);
-
-	            int64copy(h, g);
-	            int64copy(g, f);
-	            int64copy(f, e);
-	            int64add(e, d, T1);
-	            int64copy(d, c);
-	            int64copy(c, b);
-	            int64copy(b, a);
-	            int64add(a, T1, T2);
-	          }
-	          int64add(H[0], H[0], a);
-	          int64add(H[1], H[1], b);
-	          int64add(H[2], H[2], c);
-	          int64add(H[3], H[3], d);
-	          int64add(H[4], H[4], e);
-	          int64add(H[5], H[5], f);
-	          int64add(H[6], H[6], g);
-	          int64add(H[7], H[7], h);
-	        }
-
-	        //represent the hash as an array of 32-bit dwords
-	        for (i = 0; i < 8; i += 1) {
-	          hash[2 * i] = H[i].h;
-	          hash[2 * i + 1] = H[i].l;
-	        }
-	        return hash;
+
+	      function baseUnset(object, path) {
+	        path = castPath(path, object);
+	        object = parent(object, path);
+	        return object == null || delete object[toKey(last(path))];
 	      }
+	      /**
+	       * The base implementation of `_.update`.
+	       *
+	       * @private
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The path of the property to update.
+	       * @param {Function} updater The function to produce the updated value.
+	       * @param {Function} [customizer] The function to customize path creation.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	      //A constructor for 64-bit numbers
 
-	      function int64(h, l) {
-	        this.h = h;
-	        this.l = l;
-	        //this.toString = int64toString;
+	      function baseUpdate(object, path, updater, customizer) {
+	        return baseSet(object, path, updater(baseGet(object, path)), customizer);
 	      }
+	      /**
+	       * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
+	       * without support for iteratee shorthands.
+	       *
+	       * @private
+	       * @param {Array} array The array to query.
+	       * @param {Function} predicate The function invoked per iteration.
+	       * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
+	       * @param {boolean} [fromRight] Specify iterating from right to left.
+	       * @returns {Array} Returns the slice of `array`.
+	       */
 
-	      //Copies src into dst, assuming both are 64-bit numbers
 
-	      function int64copy(dst, src) {
-	        dst.h = src.h;
-	        dst.l = src.l;
-	      }
+	      function baseWhile(array, predicate, isDrop, fromRight) {
+	        var length = array.length,
+	            index = fromRight ? length : -1;
 
-	      //Right-rotates a 64-bit number by shift
-	      //Won't handle cases of shift>=32
-	      //The function revrrot() is for that
+	        while ((fromRight ? index-- : ++index < length) && predicate(array[index], index, array)) {}
 
-	      function int64rrot(dst, x, shift) {
-	        dst.l = (x.l >>> shift) | (x.h << (32 - shift));
-	        dst.h = (x.h >>> shift) | (x.l << (32 - shift));
+	        return isDrop ? baseSlice(array, fromRight ? 0 : index, fromRight ? index + 1 : length) : baseSlice(array, fromRight ? index + 1 : 0, fromRight ? length : index);
 	      }
+	      /**
+	       * The base implementation of `wrapperValue` which returns the result of
+	       * performing a sequence of actions on the unwrapped `value`, where each
+	       * successive action is supplied the return value of the previous.
+	       *
+	       * @private
+	       * @param {*} value The unwrapped value.
+	       * @param {Array} actions Actions to perform to resolve the unwrapped value.
+	       * @returns {*} Returns the resolved value.
+	       */
 
-	      //Reverses the dwords of the source and then rotates right by shift.
-	      //This is equivalent to rotation by 32+shift
 
-	      function int64revrrot(dst, x, shift) {
-	        dst.l = (x.h >>> shift) | (x.l << (32 - shift));
-	        dst.h = (x.l >>> shift) | (x.h << (32 - shift));
-	      }
+	      function baseWrapperValue(value, actions) {
+	        var result = value;
 
-	      //Bitwise-shifts right a 64-bit number by shift
-	      //Won't handle shift>=32, but it's never needed in SHA512
+	        if (result instanceof LazyWrapper) {
+	          result = result.value();
+	        }
 
-	      function int64shr(dst, x, shift) {
-	        dst.l = (x.l >>> shift) | (x.h << (32 - shift));
-	        dst.h = (x.h >>> shift);
+	        return arrayReduce(actions, function (result, action) {
+	          return action.func.apply(action.thisArg, arrayPush([result], action.args));
+	        }, result);
 	      }
+	      /**
+	       * The base implementation of methods like `_.xor`, without support for
+	       * iteratee shorthands, that accepts an array of arrays to inspect.
+	       *
+	       * @private
+	       * @param {Array} arrays The arrays to inspect.
+	       * @param {Function} [iteratee] The iteratee invoked per element.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new array of values.
+	       */
 
-	      //Adds two 64-bit numbers
-	      //Like the original implementation, does not rely on 32-bit operations
 
-	      function int64add(dst, x, y) {
-	        var w0 = (x.l & 0xffff) + (y.l & 0xffff);
-	        var w1 = (x.l >>> 16) + (y.l >>> 16) + (w0 >>> 16);
-	        var w2 = (x.h & 0xffff) + (y.h & 0xffff) + (w1 >>> 16);
-	        var w3 = (x.h >>> 16) + (y.h >>> 16) + (w2 >>> 16);
-	        dst.l = (w0 & 0xffff) | (w1 << 16);
-	        dst.h = (w2 & 0xffff) | (w3 << 16);
-	      }
+	      function baseXor(arrays, iteratee, comparator) {
+	        var length = arrays.length;
 
-	      //Same, except with 4 addends. Works faster than adding them one by one.
+	        if (length < 2) {
+	          return length ? baseUniq(arrays[0]) : [];
+	        }
 
-	      function int64add4(dst, a, b, c, d) {
-	        var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff);
-	        var w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (w0 >>> 16);
-	        var w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (w1 >>> 16);
-	        var w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (w2 >>> 16);
-	        dst.l = (w0 & 0xffff) | (w1 << 16);
-	        dst.h = (w2 & 0xffff) | (w3 << 16);
-	      }
+	        var index = -1,
+	            result = Array(length);
 
-	      //Same, except with 5 addends
+	        while (++index < length) {
+	          var array = arrays[index],
+	              othIndex = -1;
 
-	      function int64add5(dst, a, b, c, d, e) {
-	        var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff) + (e.l & 0xffff),
-	          w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (e.l >>> 16) + (w0 >>> 16),
-	          w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (e.h & 0xffff) + (w1 >>> 16),
-	          w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (e.h >>> 16) + (w2 >>> 16);
-	        dst.l = (w0 & 0xffff) | (w1 << 16);
-	        dst.h = (w2 & 0xffff) | (w3 << 16);
+	          while (++othIndex < length) {
+	            if (othIndex != index) {
+	              result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
+	            }
+	          }
+	        }
+
+	        return baseUniq(baseFlatten(result, 1), iteratee, comparator);
 	      }
-	    },
-	    /**
-	     * @class Hashes.RMD160
-	     * @constructor
-	     * @param {Object} [config]
-	     *
-	     * A JavaScript implementation of the RIPEMD-160 Algorithm
-	     * Version 2.2 Copyright Jeremy Lin, Paul Johnston 2000 - 2009.
-	     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-	     * See http://pajhome.org.uk/crypt/md5 for details.
-	     * Also http://www.ocf.berkeley.edu/~jjlin/jsotp/
-	     */
-	    RMD160: function(options) {
 	      /**
-	       * Private properties configuration variables. You may need to tweak these to be compatible with
-	       * the server-side, but the defaults work in most cases.
-	       * @see this.setUpperCase() method
-	       * @see this.setPad() method
+	       * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
+	       *
+	       * @private
+	       * @param {Array} props The property identifiers.
+	       * @param {Array} values The property values.
+	       * @param {Function} assignFunc The function to assign values.
+	       * @returns {Object} Returns the new object.
 	       */
-	      var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false,
-	        /* hexadecimal output case format. false - lowercase; true - uppercase  */
-	        b64pad = (options && typeof options.pad === 'string') ? options.pa : '=',
-	        /* base-64 pad character. Default '=' for strict RFC compliance   */
-	        utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true,
-	        /* enable/disable utf8 encoding */
-	        rmd160_r1 = [
-	          0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
-	          7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
-	          3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
-	          1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
-	          4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13
-	        ],
-	        rmd160_r2 = [
-	          5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
-	          6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
-	          15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
-	          8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
-	          12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11
-	        ],
-	        rmd160_s1 = [
-	          11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
-	          7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
-	          11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
-	          11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
-	          9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6
-	        ],
-	        rmd160_s2 = [
-	          8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
-	          9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
-	          9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
-	          15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
-	          8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11
-	        ];
 
-	      /* privileged (public) methods */
-	      this.hex = function(s) {
-	        return rstr2hex(rstr(s));
-	      };
-	      this.b64 = function(s) {
-	        return rstr2b64(rstr(s), b64pad);
-	      };
-	      this.any = function(s, e) {
-	        return rstr2any(rstr(s), e);
-	      };
-	      this.raw = function(s) {
-	        return rstr(s);
-	      };
-	      this.hex_hmac = function(k, d) {
-	        return rstr2hex(rstr_hmac(k, d));
-	      };
-	      this.b64_hmac = function(k, d) {
-	        return rstr2b64(rstr_hmac(k, d), b64pad);
-	      };
-	      this.any_hmac = function(k, d, e) {
-	        return rstr2any(rstr_hmac(k, d), e);
-	      };
+
+	      function baseZipObject(props, values, assignFunc) {
+	        var index = -1,
+	            length = props.length,
+	            valsLength = values.length,
+	            result = {};
+
+	        while (++index < length) {
+	          var value = index < valsLength ? values[index] : undefined$1;
+	          assignFunc(result, props[index], value);
+	        }
+
+	        return result;
+	      }
 	      /**
-	       * Perform a simple self-test to see if the VM is working
-	       * @return {String} Hexadecimal hash sample
-	       * @public
+	       * Casts `value` to an empty array if it's not an array like object.
+	       *
+	       * @private
+	       * @param {*} value The value to inspect.
+	       * @returns {Array|Object} Returns the cast array-like object.
 	       */
-	      this.vm_test = function() {
-	        return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	      };
+
+
+	      function castArrayLikeObject(value) {
+	        return isArrayLikeObject(value) ? value : [];
+	      }
 	      /**
-	       * @description Enable/disable uppercase hexadecimal returned string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
+	       * Casts `value` to `identity` if it's not a function.
+	       *
+	       * @private
+	       * @param {*} value The value to inspect.
+	       * @returns {Function} Returns cast function.
 	       */
-	      this.setUpperCase = function(a) {
-	        if (typeof a === 'boolean') {
-	          hexcase = a;
-	        }
-	        return this;
-	      };
+
+
+	      function castFunction(value) {
+	        return typeof value == 'function' ? value : identity;
+	      }
 	      /**
-	       * @description Defines a base64 pad string
-	       * @param {string} Pad
-	       * @return {Object} this
-	       * @public
+	       * Casts `value` to a path array if it's not one.
+	       *
+	       * @private
+	       * @param {*} value The value to inspect.
+	       * @param {Object} [object] The object to query keys on.
+	       * @returns {Array} Returns the cast property path array.
 	       */
-	      this.setPad = function(a) {
-	        if (typeof a !== 'undefined') {
-	          b64pad = a;
+
+
+	      function castPath(value, object) {
+	        if (isArray(value)) {
+	          return value;
 	        }
-	        return this;
-	      };
+
+	        return isKey(value, object) ? [value] : stringToPath(toString(value));
+	      }
 	      /**
-	       * @description Defines a base64 pad string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
+	       * A `baseRest` alias which can be replaced with `identity` by module
+	       * replacement plugins.
+	       *
+	       * @private
+	       * @type {Function}
+	       * @param {Function} func The function to apply a rest parameter to.
+	       * @returns {Function} Returns the new function.
 	       */
-	      this.setUTF8 = function(a) {
-	        if (typeof a === 'boolean') {
-	          utf8 = a;
-	        }
-	        return this;
-	      };
 
-	      /* private methods */
 
+	      var castRest = baseRest;
 	      /**
-	       * Calculate the rmd160 of a raw string
+	       * Casts `array` to a slice if it's needed.
+	       *
+	       * @private
+	       * @param {Array} array The array to inspect.
+	       * @param {number} start The start position.
+	       * @param {number} [end=array.length] The end position.
+	       * @returns {Array} Returns the cast slice.
 	       */
 
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binl2rstr(binl(rstr2binl(s), s.length * 8));
+	      function castSlice(array, start, end) {
+	        var length = array.length;
+	        end = end === undefined$1 ? length : end;
+	        return !start && end >= length ? array : baseSlice(array, start, end);
 	      }
+	      /**
+	       * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).
+	       *
+	       * @private
+	       * @param {number|Object} id The timer id or timeout object of the timer to clear.
+	       */
+
 
+	      var clearTimeout = ctxClearTimeout || function (id) {
+	        return root.clearTimeout(id);
+	      };
 	      /**
-	       * Calculate the HMAC-rmd160 of a key and some data (raw strings)
+	       * Creates a clone of  `buffer`.
+	       *
+	       * @private
+	       * @param {Buffer} buffer The buffer to clone.
+	       * @param {boolean} [isDeep] Specify a deep clone.
+	       * @returns {Buffer} Returns the cloned buffer.
 	       */
 
-	      function rstr_hmac(key, data) {
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
-	        var i, hash,
-	          bkey = rstr2binl(key),
-	          ipad = Array(16),
-	          opad = Array(16);
 
-	        if (bkey.length > 16) {
-	          bkey = binl(bkey, key.length * 8);
+	      function cloneBuffer(buffer, isDeep) {
+	        if (isDeep) {
+	          return buffer.slice();
 	        }
 
-	        for (i = 0; i < 16; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	        }
-	        hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
-	        return binl2rstr(binl(opad.concat(hash), 512 + 160));
+	        var length = buffer.length,
+	            result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);
+	        buffer.copy(result);
+	        return result;
 	      }
-
 	      /**
-	       * Convert an array of little-endian words to a string
+	       * Creates a clone of `arrayBuffer`.
+	       *
+	       * @private
+	       * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
+	       * @returns {ArrayBuffer} Returns the cloned array buffer.
 	       */
 
-	      function binl2rstr(input) {
-	        var i, output = '',
-	          l = input.length * 32;
-	        for (i = 0; i < l; i += 8) {
-	          output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xFF);
-	        }
-	        return output;
-	      }
-
-	      /**
-	       * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
-	       */
-
-	      function binl(x, len) {
-	        var T, j, i, l,
-	          h0 = 0x67452301,
-	          h1 = 0xefcdab89,
-	          h2 = 0x98badcfe,
-	          h3 = 0x10325476,
-	          h4 = 0xc3d2e1f0,
-	          A1, B1, C1, D1, E1,
-	          A2, B2, C2, D2, E2;
-
-	        /* append padding */
-	        x[len >> 5] |= 0x80 << (len % 32);
-	        x[(((len + 64) >>> 9) << 4) + 14] = len;
-	        l = x.length;
-
-	        for (i = 0; i < l; i += 16) {
-	          A1 = A2 = h0;
-	          B1 = B2 = h1;
-	          C1 = C2 = h2;
-	          D1 = D2 = h3;
-	          E1 = E2 = h4;
-	          for (j = 0; j <= 79; j += 1) {
-	            T = safe_add(A1, rmd160_f(j, B1, C1, D1));
-	            T = safe_add(T, x[i + rmd160_r1[j]]);
-	            T = safe_add(T, rmd160_K1(j));
-	            T = safe_add(bit_rol(T, rmd160_s1[j]), E1);
-	            A1 = E1;
-	            E1 = D1;
-	            D1 = bit_rol(C1, 10);
-	            C1 = B1;
-	            B1 = T;
-	            T = safe_add(A2, rmd160_f(79 - j, B2, C2, D2));
-	            T = safe_add(T, x[i + rmd160_r2[j]]);
-	            T = safe_add(T, rmd160_K2(j));
-	            T = safe_add(bit_rol(T, rmd160_s2[j]), E2);
-	            A2 = E2;
-	            E2 = D2;
-	            D2 = bit_rol(C2, 10);
-	            C2 = B2;
-	            B2 = T;
-	          }
-
-	          T = safe_add(h1, safe_add(C1, D2));
-	          h1 = safe_add(h2, safe_add(D1, E2));
-	          h2 = safe_add(h3, safe_add(E1, A2));
-	          h3 = safe_add(h4, safe_add(A1, B2));
-	          h4 = safe_add(h0, safe_add(B1, C2));
-	          h0 = T;
-	        }
-	        return [h0, h1, h2, h3, h4];
-	      }
-
-	      // specific algorithm methods
-
-	      function rmd160_f(j, x, y, z) {
-	        return (0 <= j && j <= 15) ? (x ^ y ^ z) :
-	          (16 <= j && j <= 31) ? (x & y) | (~x & z) :
-	          (32 <= j && j <= 47) ? (x | ~y) ^ z :
-	          (48 <= j && j <= 63) ? (x & z) | (y & ~z) :
-	          (64 <= j && j <= 79) ? x ^ (y | ~z) :
-	          'rmd160_f: j out of range';
-	      }
-
-	      function rmd160_K1(j) {
-	        return (0 <= j && j <= 15) ? 0x00000000 :
-	          (16 <= j && j <= 31) ? 0x5a827999 :
-	          (32 <= j && j <= 47) ? 0x6ed9eba1 :
-	          (48 <= j && j <= 63) ? 0x8f1bbcdc :
-	          (64 <= j && j <= 79) ? 0xa953fd4e :
-	          'rmd160_K1: j out of range';
-	      }
-
-	      function rmd160_K2(j) {
-	        return (0 <= j && j <= 15) ? 0x50a28be6 :
-	          (16 <= j && j <= 31) ? 0x5c4dd124 :
-	          (32 <= j && j <= 47) ? 0x6d703ef3 :
-	          (48 <= j && j <= 63) ? 0x7a6d76e9 :
-	          (64 <= j && j <= 79) ? 0x00000000 :
-	          'rmd160_K2: j out of range';
-	      }
-	    }
-	  };
-
-	  // exposes Hashes
-	  (function(window, undefined$1) {
-	    var freeExports = false;
-	    {
-	      freeExports = exports;
-	      if (exports && typeof commonjsGlobal === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
-	        window = commonjsGlobal;
-	      }
-	    }
 
-	    if (typeof undefined$1 === 'function' && typeof undefined$1.amd === 'object' && undefined$1.amd) {
-	      // define as an anonymous module, so, through path mapping, it can be aliased
-	      undefined$1(function() {
-	        return Hashes;
-	      });
-	    } else if (freeExports) {
-	      // in Node.js or RingoJS v0.8.0+
-	      if ( module && module.exports === freeExports) {
-	        module.exports = Hashes;
-	      }
-	      // in Narwhal or RingoJS v0.7.0-
-	      else {
-	        freeExports.Hashes = Hashes;
+	      function cloneArrayBuffer(arrayBuffer) {
+	        var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
+	        new Uint8Array(result).set(new Uint8Array(arrayBuffer));
+	        return result;
 	      }
-	    } else {
-	      // in a browser or Rhino
-	      window.Hashes = Hashes;
-	    }
-	  }(this));
-	}()); // IIFE
-	});
+	      /**
+	       * Creates a clone of `dataView`.
+	       *
+	       * @private
+	       * @param {Object} dataView The data view to clone.
+	       * @param {boolean} [isDeep] Specify a deep clone.
+	       * @returns {Object} Returns the cloned data view.
+	       */
 
-	var immutable = extend$2;
 
-	var hasOwnProperty$3 = Object.prototype.hasOwnProperty;
+	      function cloneDataView(dataView, isDeep) {
+	        var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
+	        return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
+	      }
+	      /**
+	       * Creates a clone of `regexp`.
+	       *
+	       * @private
+	       * @param {Object} regexp The regexp to clone.
+	       * @returns {Object} Returns the cloned regexp.
+	       */
 
-	function extend$2() {
-	    var arguments$1 = arguments;
 
-	    var target = {};
+	      function cloneRegExp(regexp) {
+	        var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
+	        result.lastIndex = regexp.lastIndex;
+	        return result;
+	      }
+	      /**
+	       * Creates a clone of the `symbol` object.
+	       *
+	       * @private
+	       * @param {Object} symbol The symbol object to clone.
+	       * @returns {Object} Returns the cloned symbol object.
+	       */
 
-	    for (var i = 0; i < arguments.length; i++) {
-	        var source = arguments$1[i];
 
-	        for (var key in source) {
-	            if (hasOwnProperty$3.call(source, key)) {
-	                target[key] = source[key];
-	            }
-	        }
-	    }
+	      function cloneSymbol(symbol) {
+	        return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
+	      }
+	      /**
+	       * Creates a clone of `typedArray`.
+	       *
+	       * @private
+	       * @param {Object} typedArray The typed array to clone.
+	       * @param {boolean} [isDeep] Specify a deep clone.
+	       * @returns {Object} Returns the cloned typed array.
+	       */
 
-	    return target
-	}
 
-	var sha1 = new hashes.SHA1();
+	      function cloneTypedArray(typedArray, isDeep) {
+	        var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
+	        return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
+	      }
+	      /**
+	       * Compares values to sort them in ascending order.
+	       *
+	       * @private
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {number} Returns the sort order indicator for `value`.
+	       */
 
-	var ohauth = {};
 
-	ohauth.qsString = function(obj) {
-	    return Object.keys(obj).sort().map(function(key) {
-	        return ohauth.percentEncode(key) + '=' +
-	            ohauth.percentEncode(obj[key]);
-	    }).join('&');
-	};
+	      function compareAscending(value, other) {
+	        if (value !== other) {
+	          var valIsDefined = value !== undefined$1,
+	              valIsNull = value === null,
+	              valIsReflexive = value === value,
+	              valIsSymbol = isSymbol(value);
+	          var othIsDefined = other !== undefined$1,
+	              othIsNull = other === null,
+	              othIsReflexive = other === other,
+	              othIsSymbol = isSymbol(other);
 
-	ohauth.stringQs = function(str) {
-	    return str.split('&').filter(function (pair) {
-	        return pair !== '';
-	    }).reduce(function(obj, pair){
-	        var parts = pair.split('=');
-	        obj[decodeURIComponent(parts[0])] = (null === parts[1]) ?
-	            '' : decodeURIComponent(parts[1]);
-	        return obj;
-	    }, {});
-	};
+	          if (!othIsNull && !othIsSymbol && !valIsSymbol && value > other || valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol || valIsNull && othIsDefined && othIsReflexive || !valIsDefined && othIsReflexive || !valIsReflexive) {
+	            return 1;
+	          }
 
-	ohauth.rawxhr = function(method, url, data, headers, callback) {
-	    var xhr = new XMLHttpRequest(),
-	        twoHundred = /^20\d$/;
-	    xhr.onreadystatechange = function() {
-	        if (4 === xhr.readyState && 0 !== xhr.status) {
-	            if (twoHundred.test(xhr.status)) { callback(null, xhr); }
-	            else { return callback(xhr, null); }
+	          if (!valIsNull && !valIsSymbol && !othIsSymbol && value < other || othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol || othIsNull && valIsDefined && valIsReflexive || !othIsDefined && valIsReflexive || !othIsReflexive) {
+	            return -1;
+	          }
 	        }
-	    };
-	    xhr.onerror = function(e) { return callback(e, null); };
-	    xhr.open(method, url, true);
-	    for (var h in headers) { xhr.setRequestHeader(h, headers[h]); }
-	    xhr.send(data);
-	    return xhr;
-	};
-
-	ohauth.xhr = function(method, url, auth, data, options, callback) {
-	    var headers = (options && options.header) || {
-	        'Content-Type': 'application/x-www-form-urlencoded'
-	    };
-	    headers.Authorization = 'OAuth ' + ohauth.authHeader(auth);
-	    return ohauth.rawxhr(method, url, data, headers, callback);
-	};
 
-	ohauth.nonce = function() {
-	    for (var o = ''; o.length < 6;) {
-	        o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
-	    }
-	    return o;
-	};
-
-	ohauth.authHeader = function(obj) {
-	    return Object.keys(obj).sort().map(function(key) {
-	        return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
-	    }).join(', ');
-	};
-
-	ohauth.timestamp = function() { return ~~((+new Date()) / 1000); };
+	        return 0;
+	      }
+	      /**
+	       * Used by `_.orderBy` to compare multiple properties of a value to another
+	       * and stable sort them.
+	       *
+	       * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
+	       * specify an order of "desc" for descending or "asc" for ascending sort order
+	       * of corresponding values.
+	       *
+	       * @private
+	       * @param {Object} object The object to compare.
+	       * @param {Object} other The other object to compare.
+	       * @param {boolean[]|string[]} orders The order to sort by for each property.
+	       * @returns {number} Returns the sort order indicator for `object`.
+	       */
 
-	ohauth.percentEncode = function(s) {
-	    return encodeURIComponent(s)
-	        .replace(/\!/g, '%21').replace(/\'/g, '%27')
-	        .replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
-	};
 
-	ohauth.baseString = function(method, url, params) {
-	    if (params.oauth_signature) { delete params.oauth_signature; }
-	    return [
-	        method,
-	        ohauth.percentEncode(url),
-	        ohauth.percentEncode(ohauth.qsString(params))].join('&');
-	};
+	      function compareMultiple(object, other, orders) {
+	        var index = -1,
+	            objCriteria = object.criteria,
+	            othCriteria = other.criteria,
+	            length = objCriteria.length,
+	            ordersLength = orders.length;
 
-	ohauth.signature = function(oauth_secret, token_secret, baseString) {
-	    return sha1.b64_hmac(
-	        ohauth.percentEncode(oauth_secret) + '&' +
-	        ohauth.percentEncode(token_secret),
-	        baseString);
-	};
+	        while (++index < length) {
+	          var result = compareAscending(objCriteria[index], othCriteria[index]);
 
-	/**
-	 * Takes an options object for configuration (consumer_key,
-	 * consumer_secret, version, signature_method, token, token_secret)
-	 * and returns a function that generates the Authorization header
-	 * for given data.
-	 *
-	 * The returned function takes these parameters:
-	 * - method: GET/POST/...
-	 * - uri: full URI with protocol, port, path and query string
-	 * - extra_params: any extra parameters (that are passed in the POST data),
-	 *   can be an object or a from-urlencoded string.
-	 *
-	 * Returned function returns full OAuth header with "OAuth" string in it.
-	 */
+	          if (result) {
+	            if (index >= ordersLength) {
+	              return result;
+	            }
 
-	ohauth.headerGenerator = function(options) {
-	    options = options || {};
-	    var consumer_key = options.consumer_key || '',
-	        consumer_secret = options.consumer_secret || '',
-	        signature_method = options.signature_method || 'HMAC-SHA1',
-	        version = options.version || '1.0',
-	        token = options.token || '',
-	        token_secret = options.token_secret || '';
+	            var order = orders[index];
+	            return result * (order == 'desc' ? -1 : 1);
+	          }
+	        } // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
+	        // that causes it, under certain circumstances, to provide the same value for
+	        // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
+	        // for more details.
+	        //
+	        // This also ensures a stable sort in V8 and other engines.
+	        // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
 
-	    return function(method, uri, extra_params) {
-	        method = method.toUpperCase();
-	        if (typeof extra_params === 'string' && extra_params.length > 0) {
-	            extra_params = ohauth.stringQs(extra_params);
-	        }
 
-	        var uri_parts = uri.split('?', 2),
-	        base_uri = uri_parts[0];
+	        return object.index - other.index;
+	      }
+	      /**
+	       * Creates an array that is the composition of partially applied arguments,
+	       * placeholders, and provided arguments into a single array of arguments.
+	       *
+	       * @private
+	       * @param {Array} args The provided arguments.
+	       * @param {Array} partials The arguments to prepend to those provided.
+	       * @param {Array} holders The `partials` placeholder indexes.
+	       * @params {boolean} [isCurried] Specify composing for a curried function.
+	       * @returns {Array} Returns the new array of composed arguments.
+	       */
 
-	        var query_params = uri_parts.length === 2 ?
-	            ohauth.stringQs(uri_parts[1]) : {};
 
-	        var oauth_params = {
-	            oauth_consumer_key: consumer_key,
-	            oauth_signature_method: signature_method,
-	            oauth_version: version,
-	            oauth_timestamp: ohauth.timestamp(),
-	            oauth_nonce: ohauth.nonce()
-	        };
+	      function composeArgs(args, partials, holders, isCurried) {
+	        var argsIndex = -1,
+	            argsLength = args.length,
+	            holdersLength = holders.length,
+	            leftIndex = -1,
+	            leftLength = partials.length,
+	            rangeLength = nativeMax(argsLength - holdersLength, 0),
+	            result = Array(leftLength + rangeLength),
+	            isUncurried = !isCurried;
 
-	        if (token) { oauth_params.oauth_token = token; }
+	        while (++leftIndex < leftLength) {
+	          result[leftIndex] = partials[leftIndex];
+	        }
 
-	        var all_params = immutable({}, oauth_params, query_params, extra_params),
-	            base_str = ohauth.baseString(method, base_uri, all_params);
+	        while (++argsIndex < holdersLength) {
+	          if (isUncurried || argsIndex < argsLength) {
+	            result[holders[argsIndex]] = args[argsIndex];
+	          }
+	        }
 
-	        oauth_params.oauth_signature = ohauth.signature(consumer_secret, token_secret, base_str);
+	        while (rangeLength--) {
+	          result[leftIndex++] = args[argsIndex++];
+	        }
 
-	        return 'OAuth ' + ohauth.authHeader(oauth_params);
-	    };
-	};
+	        return result;
+	      }
+	      /**
+	       * This function is like `composeArgs` except that the arguments composition
+	       * is tailored for `_.partialRight`.
+	       *
+	       * @private
+	       * @param {Array} args The provided arguments.
+	       * @param {Array} partials The arguments to append to those provided.
+	       * @param {Array} holders The `partials` placeholder indexes.
+	       * @params {boolean} [isCurried] Specify composing for a curried function.
+	       * @returns {Array} Returns the new array of composed arguments.
+	       */
 
-	var ohauth_1 = ohauth;
 
-	var resolveUrl$1 = createCommonjsModule(function (module, exports) {
-	// Copyright 2014 Simon Lydell
-	// X11 (“MIT”) Licensed. (See LICENSE.)
+	      function composeArgsRight(args, partials, holders, isCurried) {
+	        var argsIndex = -1,
+	            argsLength = args.length,
+	            holdersIndex = -1,
+	            holdersLength = holders.length,
+	            rightIndex = -1,
+	            rightLength = partials.length,
+	            rangeLength = nativeMax(argsLength - holdersLength, 0),
+	            result = Array(rangeLength + rightLength),
+	            isUncurried = !isCurried;
 
-	void (function(root, factory) {
-	  {
-	    module.exports = factory();
-	  }
-	}(commonjsGlobal, function() {
+	        while (++argsIndex < rangeLength) {
+	          result[argsIndex] = args[argsIndex];
+	        }
 
-	  function resolveUrl(/* ...urls */) {
-	    var arguments$1 = arguments;
+	        var offset = argsIndex;
 
-	    var numUrls = arguments.length;
+	        while (++rightIndex < rightLength) {
+	          result[offset + rightIndex] = partials[rightIndex];
+	        }
 
-	    if (numUrls === 0) {
-	      throw new Error("resolveUrl requires at least one argument; got none.")
-	    }
+	        while (++holdersIndex < holdersLength) {
+	          if (isUncurried || argsIndex < argsLength) {
+	            result[offset + holders[holdersIndex]] = args[argsIndex++];
+	          }
+	        }
 
-	    var base = document.createElement("base");
-	    base.href = arguments[0];
+	        return result;
+	      }
+	      /**
+	       * Copies the values of `source` to `array`.
+	       *
+	       * @private
+	       * @param {Array} source The array to copy values from.
+	       * @param {Array} [array=[]] The array to copy values to.
+	       * @returns {Array} Returns `array`.
+	       */
 
-	    if (numUrls === 1) {
-	      return base.href
-	    }
 
-	    var head = document.getElementsByTagName("head")[0];
-	    head.insertBefore(base, head.firstChild);
+	      function copyArray(source, array) {
+	        var index = -1,
+	            length = source.length;
+	        array || (array = Array(length));
 
-	    var a = document.createElement("a");
-	    var resolved;
+	        while (++index < length) {
+	          array[index] = source[index];
+	        }
 
-	    for (var index = 1; index < numUrls; index++) {
-	      a.href = arguments$1[index];
-	      resolved = a.href;
-	      base.href = resolved;
-	    }
+	        return array;
+	      }
+	      /**
+	       * Copies properties of `source` to `object`.
+	       *
+	       * @private
+	       * @param {Object} source The object to copy properties from.
+	       * @param {Array} props The property identifiers to copy.
+	       * @param {Object} [object={}] The object to copy properties to.
+	       * @param {Function} [customizer] The function to customize copied values.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	    head.removeChild(base);
 
-	    return resolved
-	  }
+	      function copyObject(source, props, object, customizer) {
+	        var isNew = !object;
+	        object || (object = {});
+	        var index = -1,
+	            length = props.length;
 
-	  return resolveUrl
+	        while (++index < length) {
+	          var key = props[index];
+	          var newValue = customizer ? customizer(object[key], source[key], key, object, source) : undefined$1;
 
-	}));
-	});
+	          if (newValue === undefined$1) {
+	            newValue = source[key];
+	          }
 
-	var assign$1 = make_assign();
-	var create$8 = make_create();
-	var trim = make_trim();
-	var Global = (typeof window !== 'undefined' ? window : commonjsGlobal);
-
-	var util = {
-		assign: assign$1,
-		create: create$8,
-		trim: trim,
-		bind: bind$3,
-		slice: slice$5,
-		each: each,
-		map: map$5,
-		pluck: pluck,
-		isList: isList,
-		isFunction: isFunction$2,
-		isObject: isObject$2,
-		Global: Global
-	};
+	          if (isNew) {
+	            baseAssignValue(object, key, newValue);
+	          } else {
+	            assignValue(object, key, newValue);
+	          }
+	        }
 
-	function make_assign() {
-		if (Object.assign) {
-			return Object.assign
-		} else {
-			return function shimAssign(obj, props1, props2, etc) {
-				var arguments$1 = arguments;
-
-				for (var i = 1; i < arguments.length; i++) {
-					each(Object(arguments$1[i]), function(val, key) {
-						obj[key] = val;
-					});
-				}			
-				return obj
-			}
-		}
-	}
+	        return object;
+	      }
+	      /**
+	       * Copies own symbols of `source` to `object`.
+	       *
+	       * @private
+	       * @param {Object} source The object to copy symbols from.
+	       * @param {Object} [object={}] The object to copy symbols to.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	function make_create() {
-		if (Object.create) {
-			return function create(obj, assignProps1, assignProps2, etc) {
-				var assignArgsList = slice$5(arguments, 1);
-				return assign$1.apply(this, [Object.create(obj)].concat(assignArgsList))
-			}
-		} else {
-			function F() {} // eslint-disable-line no-inner-declarations
-			return function create(obj, assignProps1, assignProps2, etc) {
-				var assignArgsList = slice$5(arguments, 1);
-				F.prototype = obj;
-				return assign$1.apply(this, [new F()].concat(assignArgsList))
-			}
-		}
-	}
 
-	function make_trim() {
-		if (String.prototype.trim) {
-			return function trim(str) {
-				return String.prototype.trim.call(str)
-			}
-		} else {
-			return function trim(str) {
-				return str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '')
-			}
-		}
-	}
+	      function copySymbols(source, object) {
+	        return copyObject(source, getSymbols(source), object);
+	      }
+	      /**
+	       * Copies own and inherited symbols of `source` to `object`.
+	       *
+	       * @private
+	       * @param {Object} source The object to copy symbols from.
+	       * @param {Object} [object={}] The object to copy symbols to.
+	       * @returns {Object} Returns `object`.
+	       */
 
-	function bind$3(obj, fn) {
-		return function() {
-			return fn.apply(obj, Array.prototype.slice.call(arguments, 0))
-		}
-	}
 
-	function slice$5(arr, index) {
-		return Array.prototype.slice.call(arr, index || 0)
-	}
+	      function copySymbolsIn(source, object) {
+	        return copyObject(source, getSymbolsIn(source), object);
+	      }
+	      /**
+	       * Creates a function like `_.groupBy`.
+	       *
+	       * @private
+	       * @param {Function} setter The function to set accumulator values.
+	       * @param {Function} [initializer] The accumulator object initializer.
+	       * @returns {Function} Returns the new aggregator function.
+	       */
 
-	function each(obj, fn) {
-		pluck(obj, function(val, key) {
-			fn(val, key);
-			return false
-		});
-	}
 
-	function map$5(obj, fn) {
-		var res = (isList(obj) ? [] : {});
-		pluck(obj, function(v, k) {
-			res[k] = fn(v, k);
-			return false
-		});
-		return res
-	}
+	      function createAggregator(setter, initializer) {
+	        return function (collection, iteratee) {
+	          var func = isArray(collection) ? arrayAggregator : baseAggregator,
+	              accumulator = initializer ? initializer() : {};
+	          return func(collection, setter, getIteratee(iteratee, 2), accumulator);
+	        };
+	      }
+	      /**
+	       * Creates a function like `_.assign`.
+	       *
+	       * @private
+	       * @param {Function} assigner The function to assign values.
+	       * @returns {Function} Returns the new assigner function.
+	       */
 
-	function pluck(obj, fn) {
-		if (isList(obj)) {
-			for (var i=0; i<obj.length; i++) {
-				if (fn(obj[i], i)) {
-					return obj[i]
-				}
-			}
-		} else {
-			for (var key in obj) {
-				if (obj.hasOwnProperty(key)) {
-					if (fn(obj[key], key)) {
-						return obj[key]
-					}
-				}
-			}
-		}
-	}
 
-	function isList(val) {
-		return (val != null && typeof val != 'function' && typeof val.length == 'number')
-	}
+	      function createAssigner(assigner) {
+	        return baseRest(function (object, sources) {
+	          var index = -1,
+	              length = sources.length,
+	              customizer = length > 1 ? sources[length - 1] : undefined$1,
+	              guard = length > 2 ? sources[2] : undefined$1;
+	          customizer = assigner.length > 3 && typeof customizer == 'function' ? (length--, customizer) : undefined$1;
 
-	function isFunction$2(val) {
-		return val && {}.toString.call(val) === '[object Function]'
-	}
+	          if (guard && isIterateeCall(sources[0], sources[1], guard)) {
+	            customizer = length < 3 ? undefined$1 : customizer;
+	            length = 1;
+	          }
 
-	function isObject$2(val) {
-		return val && {}.toString.call(val) === '[object Object]'
-	}
+	          object = Object(object);
 
-	var slice$6 = util.slice;
-	var pluck$1 = util.pluck;
-	var each$1 = util.each;
-	var bind$4 = util.bind;
-	var create$9 = util.create;
-	var isList$1 = util.isList;
-	var isFunction$3 = util.isFunction;
-	var isObject$3 = util.isObject;
+	          while (++index < length) {
+	            var source = sources[index];
 
-	var storeEngine = {
-		createStore: createStore
-	};
+	            if (source) {
+	              assigner(object, source, index, customizer);
+	            }
+	          }
 
-	var storeAPI = {
-		version: '2.0.12',
-		enabled: false,
-		
-		// get returns the value of the given key. If that value
-		// is undefined, it returns optionalDefaultValue instead.
-		get: function(key, optionalDefaultValue) {
-			var data = this.storage.read(this._namespacePrefix + key);
-			return this._deserialize(data, optionalDefaultValue)
-		},
-
-		// set will store the given value at key and returns value.
-		// Calling set with value === undefined is equivalent to calling remove.
-		set: function(key, value) {
-			if (value === undefined) {
-				return this.remove(key)
-			}
-			this.storage.write(this._namespacePrefix + key, this._serialize(value));
-			return value
-		},
-
-		// remove deletes the key and value stored at the given key.
-		remove: function(key) {
-			this.storage.remove(this._namespacePrefix + key);
-		},
-
-		// each will call the given callback once for each key-value pair
-		// in this store.
-		each: function(callback) {
-			var self = this;
-			this.storage.each(function(val, namespacedKey) {
-				callback.call(self, self._deserialize(val), (namespacedKey || '').replace(self._namespaceRegexp, ''));
-			});
-		},
-
-		// clearAll will remove all the stored key-value pairs in this store.
-		clearAll: function() {
-			this.storage.clearAll();
-		},
-
-		// additional functionality that can't live in plugins
-		// ---------------------------------------------------
-
-		// hasNamespace returns true if this store instance has the given namespace.
-		hasNamespace: function(namespace) {
-			return (this._namespacePrefix == '__storejs_'+namespace+'_')
-		},
-
-		// createStore creates a store.js instance with the first
-		// functioning storage in the list of storage candidates,
-		// and applies the the given mixins to the instance.
-		createStore: function() {
-			return createStore.apply(this, arguments)
-		},
-		
-		addPlugin: function(plugin) {
-			this._addPlugin(plugin);
-		},
-		
-		namespace: function(namespace) {
-			return createStore(this.storage, this.plugins, namespace)
-		}
-	};
+	          return object;
+	        });
+	      }
+	      /**
+	       * Creates a `baseEach` or `baseEachRight` function.
+	       *
+	       * @private
+	       * @param {Function} eachFunc The function to iterate over a collection.
+	       * @param {boolean} [fromRight] Specify iterating from right to left.
+	       * @returns {Function} Returns the new base function.
+	       */
 
-	function _warn() {
-		var _console = (typeof console == 'undefined' ? null : console);
-		if (!_console) { return }
-		var fn = (_console.warn ? _console.warn : _console.log);
-		fn.apply(_console, arguments);
-	}
-
-	function createStore(storages, plugins, namespace) {
-		if (!namespace) {
-			namespace = '';
-		}
-		if (storages && !isList$1(storages)) {
-			storages = [storages];
-		}
-		if (plugins && !isList$1(plugins)) {
-			plugins = [plugins];
-		}
-
-		var namespacePrefix = (namespace ? '__storejs_'+namespace+'_' : '');
-		var namespaceRegexp = (namespace ? new RegExp('^'+namespacePrefix) : null);
-		var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
-		if (!legalNamespaces.test(namespace)) {
-			throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes')
-		}
-		
-		var _privateStoreProps = {
-			_namespacePrefix: namespacePrefix,
-			_namespaceRegexp: namespaceRegexp,
-
-			_testStorage: function(storage) {
-				try {
-					var testStr = '__storejs__test__';
-					storage.write(testStr, testStr);
-					var ok = (storage.read(testStr) === testStr);
-					storage.remove(testStr);
-					return ok
-				} catch(e) {
-					return false
-				}
-			},
-
-			_assignPluginFnProp: function(pluginFnProp, propName) {
-				var oldFn = this[propName];
-				this[propName] = function pluginFn() {
-					var args = slice$6(arguments, 0);
-					var self = this;
-
-					// super_fn calls the old function which was overwritten by
-					// this mixin.
-					function super_fn() {
-						if (!oldFn) { return }
-						each$1(arguments, function(arg, i) {
-							args[i] = arg;
-						});
-						return oldFn.apply(self, args)
-					}
-
-					// Give mixing function access to super_fn by prefixing all mixin function
-					// arguments with super_fn.
-					var newFnArgs = [super_fn].concat(args);
-
-					return pluginFnProp.apply(self, newFnArgs)
-				};
-			},
-
-			_serialize: function(obj) {
-				return JSON.stringify(obj)
-			},
-
-			_deserialize: function(strVal, defaultVal) {
-				if (!strVal) { return defaultVal }
-				// It is possible that a raw string value has been previously stored
-				// in a storage without using store.js, meaning it will be a raw
-				// string value instead of a JSON serialized string. By defaulting
-				// to the raw string value in case of a JSON parse error, we allow
-				// for past stored values to be forwards-compatible with store.js
-				var val = '';
-				try { val = JSON.parse(strVal); }
-				catch(e) { val = strVal; }
-
-				return (val !== undefined ? val : defaultVal)
-			},
-			
-			_addStorage: function(storage) {
-				if (this.enabled) { return }
-				if (this._testStorage(storage)) {
-					this.storage = storage;
-					this.enabled = true;
-				}
-			},
-
-			_addPlugin: function(plugin) {
-				var self = this;
-
-				// If the plugin is an array, then add all plugins in the array.
-				// This allows for a plugin to depend on other plugins.
-				if (isList$1(plugin)) {
-					each$1(plugin, function(plugin) {
-						self._addPlugin(plugin);
-					});
-					return
-				}
-
-				// Keep track of all plugins we've seen so far, so that we
-				// don't add any of them twice.
-				var seenPlugin = pluck$1(this.plugins, function(seenPlugin) {
-					return (plugin === seenPlugin)
-				});
-				if (seenPlugin) {
-					return
-				}
-				this.plugins.push(plugin);
-
-				// Check that the plugin is properly formed
-				if (!isFunction$3(plugin)) {
-					throw new Error('Plugins must be function values that return objects')
-				}
-
-				var pluginProperties = plugin.call(this);
-				if (!isObject$3(pluginProperties)) {
-					throw new Error('Plugins must return an object of function properties')
-				}
-
-				// Add the plugin function properties to this store instance.
-				each$1(pluginProperties, function(pluginFnProp, propName) {
-					if (!isFunction$3(pluginFnProp)) {
-						throw new Error('Bad plugin property: '+propName+' from plugin '+plugin.name+'. Plugins should only return functions.')
-					}
-					self._assignPluginFnProp(pluginFnProp, propName);
-				});
-			},
-			
-			// Put deprecated properties in the private API, so as to not expose it to accidential
-			// discovery through inspection of the store object.
-			
-			// Deprecated: addStorage
-			addStorage: function(storage) {
-				_warn('store.addStorage(storage) is deprecated. Use createStore([storages])');
-				this._addStorage(storage);
-			}
-		};
-
-		var store = create$9(_privateStoreProps, storeAPI, {
-			plugins: []
-		});
-		store.raw = {};
-		each$1(store, function(prop, propName) {
-			if (isFunction$3(prop)) {
-				store.raw[propName] = bind$4(store, prop);			
-			}
-		});
-		each$1(storages, function(storage) {
-			store._addStorage(storage);
-		});
-		each$1(plugins, function(plugin) {
-			store._addPlugin(plugin);
-		});
-		return store
-	}
-
-	var Global$1 = util.Global;
 
-	var localStorage_1 = {
-		name: 'localStorage',
-		read: read,
-		write: write,
-		each: each$2,
-		remove: remove$2,
-		clearAll: clearAll,
-	};
+	      function createBaseEach(eachFunc, fromRight) {
+	        return function (collection, iteratee) {
+	          if (collection == null) {
+	            return collection;
+	          }
 
-	function localStorage$1() {
-		return Global$1.localStorage
-	}
+	          if (!isArrayLike(collection)) {
+	            return eachFunc(collection, iteratee);
+	          }
 
-	function read(key) {
-		return localStorage$1().getItem(key)
-	}
+	          var length = collection.length,
+	              index = fromRight ? length : -1,
+	              iterable = Object(collection);
 
-	function write(key, data) {
-		return localStorage$1().setItem(key, data)
-	}
+	          while (fromRight ? index-- : ++index < length) {
+	            if (iteratee(iterable[index], index, iterable) === false) {
+	              break;
+	            }
+	          }
 
-	function each$2(fn) {
-		for (var i = localStorage$1().length - 1; i >= 0; i--) {
-			var key = localStorage$1().key(i);
-			fn(read(key), key);
-		}
-	}
+	          return collection;
+	        };
+	      }
+	      /**
+	       * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+	       *
+	       * @private
+	       * @param {boolean} [fromRight] Specify iterating from right to left.
+	       * @returns {Function} Returns the new base function.
+	       */
 
-	function remove$2(key) {
-		return localStorage$1().removeItem(key)
-	}
 
-	function clearAll() {
-		return localStorage$1().clear()
-	}
+	      function createBaseFor(fromRight) {
+	        return function (object, iteratee, keysFunc) {
+	          var index = -1,
+	              iterable = Object(object),
+	              props = keysFunc(object),
+	              length = props.length;
 
-	// oldFF-globalStorage provides storage for Firefox
-	// versions 6 and 7, where no localStorage, etc
-	// is available.
+	          while (length--) {
+	            var key = props[fromRight ? length : ++index];
 
+	            if (iteratee(iterable[key], key, iterable) === false) {
+	              break;
+	            }
+	          }
 
-	var Global$2 = util.Global;
+	          return object;
+	        };
+	      }
+	      /**
+	       * Creates a function that wraps `func` to invoke it with the optional `this`
+	       * binding of `thisArg`.
+	       *
+	       * @private
+	       * @param {Function} func The function to wrap.
+	       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+	       * @param {*} [thisArg] The `this` binding of `func`.
+	       * @returns {Function} Returns the new wrapped function.
+	       */
 
-	var oldFFGlobalStorage = {
-		name: 'oldFF-globalStorage',
-		read: read$1,
-		write: write$1,
-		each: each$3,
-		remove: remove$3,
-		clearAll: clearAll$1,
-	};
 
-	var globalStorage = Global$2.globalStorage;
+	      function createBind(func, bitmask, thisArg) {
+	        var isBind = bitmask & WRAP_BIND_FLAG,
+	            Ctor = createCtor(func);
 
-	function read$1(key) {
-		return globalStorage[key]
-	}
+	        function wrapper() {
+	          var fn = this && this !== root && this instanceof wrapper ? Ctor : func;
+	          return fn.apply(isBind ? thisArg : this, arguments);
+	        }
 
-	function write$1(key, data) {
-		globalStorage[key] = data;
-	}
+	        return wrapper;
+	      }
+	      /**
+	       * Creates a function like `_.lowerFirst`.
+	       *
+	       * @private
+	       * @param {string} methodName The name of the `String` case method to use.
+	       * @returns {Function} Returns the new case function.
+	       */
 
-	function each$3(fn) {
-		for (var i = globalStorage.length - 1; i >= 0; i--) {
-			var key = globalStorage.key(i);
-			fn(globalStorage[key], key);
-		}
-	}
 
-	function remove$3(key) {
-		return globalStorage.removeItem(key)
-	}
+	      function createCaseFirst(methodName) {
+	        return function (string) {
+	          string = toString(string);
+	          var strSymbols = hasUnicode(string) ? stringToArray(string) : undefined$1;
+	          var chr = strSymbols ? strSymbols[0] : string.charAt(0);
+	          var trailing = strSymbols ? castSlice(strSymbols, 1).join('') : string.slice(1);
+	          return chr[methodName]() + trailing;
+	        };
+	      }
+	      /**
+	       * Creates a function like `_.camelCase`.
+	       *
+	       * @private
+	       * @param {Function} callback The function to combine each word.
+	       * @returns {Function} Returns the new compounder function.
+	       */
 
-	function clearAll$1() {
-		each$3(function(key, _) {
-			delete globalStorage[key];
-		});
-	}
 
-	// oldIE-userDataStorage provides storage for Internet Explorer
-	// versions 6 and 7, where no localStorage, sessionStorage, etc
-	// is available.
+	      function createCompounder(callback) {
+	        return function (string) {
+	          return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');
+	        };
+	      }
+	      /**
+	       * Creates a function that produces an instance of `Ctor` regardless of
+	       * whether it was invoked as part of a `new` expression or by `call` or `apply`.
+	       *
+	       * @private
+	       * @param {Function} Ctor The constructor to wrap.
+	       * @returns {Function} Returns the new wrapped function.
+	       */
 
 
-	var Global$3 = util.Global;
+	      function createCtor(Ctor) {
+	        return function () {
+	          // Use a `switch` statement to work with class constructors. See
+	          // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
+	          // for more details.
+	          var args = arguments;
 
-	var oldIEUserDataStorage = {
-		name: 'oldIE-userDataStorage',
-		write: write$2,
-		read: read$2,
-		each: each$4,
-		remove: remove$4,
-		clearAll: clearAll$2,
-	};
+	          switch (args.length) {
+	            case 0:
+	              return new Ctor();
 
-	var storageName = 'storejs';
-	var doc = Global$3.document;
-	var _withStorageEl = _makeIEStorageElFunction();
-	var disable = (Global$3.navigator ? Global$3.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
+	            case 1:
+	              return new Ctor(args[0]);
 
-	function write$2(unfixedKey, data) {
-		if (disable) { return }
-		var fixedKey = fixKey(unfixedKey);
-		_withStorageEl(function(storageEl) {
-			storageEl.setAttribute(fixedKey, data);
-			storageEl.save(storageName);
-		});
-	}
+	            case 2:
+	              return new Ctor(args[0], args[1]);
 
-	function read$2(unfixedKey) {
-		if (disable) { return }
-		var fixedKey = fixKey(unfixedKey);
-		var res = null;
-		_withStorageEl(function(storageEl) {
-			res = storageEl.getAttribute(fixedKey);
-		});
-		return res
-	}
+	            case 3:
+	              return new Ctor(args[0], args[1], args[2]);
 
-	function each$4(callback) {
-		_withStorageEl(function(storageEl) {
-			var attributes = storageEl.XMLDocument.documentElement.attributes;
-			for (var i=attributes.length-1; i>=0; i--) {
-				var attr = attributes[i];
-				callback(storageEl.getAttribute(attr.name), attr.name);
-			}
-		});
-	}
+	            case 4:
+	              return new Ctor(args[0], args[1], args[2], args[3]);
 
-	function remove$4(unfixedKey) {
-		var fixedKey = fixKey(unfixedKey);
-		_withStorageEl(function(storageEl) {
-			storageEl.removeAttribute(fixedKey);
-			storageEl.save(storageName);
-		});
-	}
+	            case 5:
+	              return new Ctor(args[0], args[1], args[2], args[3], args[4]);
 
-	function clearAll$2() {
-		_withStorageEl(function(storageEl) {
-			var attributes = storageEl.XMLDocument.documentElement.attributes;
-			storageEl.load(storageName);
-			for (var i=attributes.length-1; i>=0; i--) {
-				storageEl.removeAttribute(attributes[i].name);
-			}
-			storageEl.save(storageName);
-		});
-	}
+	            case 6:
+	              return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
 
-	// Helpers
-	//////////
+	            case 7:
+	              return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
+	          }
 
-	// In IE7, keys cannot start with a digit or contain certain chars.
-	// See https://github.com/marcuswestin/store.js/issues/40
-	// See https://github.com/marcuswestin/store.js/issues/83
-	var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
-	function fixKey(key) {
-		return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___')
-	}
+	          var thisBinding = baseCreate(Ctor.prototype),
+	              result = Ctor.apply(thisBinding, args); // Mimic the constructor's `return` behavior.
+	          // See https://es5.github.io/#x13.2.2 for more details.
 
-	function _makeIEStorageElFunction() {
-		if (!doc || !doc.documentElement || !doc.documentElement.addBehavior) {
-			return null
-		}
-		var scriptTag = 'script',
-			storageOwner,
-			storageContainer,
-			storageEl;
-
-		// Since #userData storage applies only to specific paths, we need to
-		// somehow link our data to a specific path.  We choose /favicon.ico
-		// as a pretty safe option, since all browsers already make a request to
-		// this URL anyway and being a 404 will not hurt us here.  We wrap an
-		// iframe pointing to the favicon in an ActiveXObject(htmlfile) object
-		// (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)
-		// since the iframe access rules appear to allow direct access and
-		// manipulation of the document element, even for a 404 page.  This
-		// document can be used instead of the current document (which would
-		// have been limited to the current path) to perform #userData storage.
-		try {
-			/* global ActiveXObject */
-			storageContainer = new ActiveXObject('htmlfile');
-			storageContainer.open();
-			storageContainer.write('<'+scriptTag+'>document.w=window</'+scriptTag+'><iframe src="/favicon.ico"></iframe>');
-			storageContainer.close();
-			storageOwner = storageContainer.w.frames[0].document;
-			storageEl = storageOwner.createElement('div');
-		} catch(e) {
-			// somehow ActiveXObject instantiation failed (perhaps some special
-			// security settings or otherwse), fall back to per-path storage
-			storageEl = doc.createElement('div');
-			storageOwner = doc.body;
-		}
-
-		return function(storeFunction) {
-			var args = [].slice.call(arguments, 0);
-			args.unshift(storageEl);
-			// See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
-			// and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx
-			storageOwner.appendChild(storageEl);
-			storageEl.addBehavior('#default#userData');
-			storageEl.load(storageName);
-			storeFunction.apply(this, args);
-			storageOwner.removeChild(storageEl);
-			return
-		}
-	}
-
-	// cookieStorage is useful Safari private browser mode, where localStorage
-	// doesn't work but cookies do. This implementation is adopted from
-	// https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage
+	          return isObject(result) ? result : thisBinding;
+	        };
+	      }
+	      /**
+	       * Creates a function that wraps `func` to enable currying.
+	       *
+	       * @private
+	       * @param {Function} func The function to wrap.
+	       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+	       * @param {number} arity The arity of `func`.
+	       * @returns {Function} Returns the new wrapped function.
+	       */
 
 
-	var Global$4 = util.Global;
-	var trim$1 = util.trim;
+	      function createCurry(func, bitmask, arity) {
+	        var Ctor = createCtor(func);
 
-	var cookieStorage = {
-		name: 'cookieStorage',
-		read: read$3,
-		write: write$3,
-		each: each$5,
-		remove: remove$5,
-		clearAll: clearAll$3,
-	};
+	        function wrapper() {
+	          var length = arguments.length,
+	              args = Array(length),
+	              index = length,
+	              placeholder = getHolder(wrapper);
 
-	var doc$1 = Global$4.document;
+	          while (index--) {
+	            args[index] = arguments[index];
+	          }
 
-	function read$3(key) {
-		if (!key || !_has(key)) { return null }
-		var regexpStr = "(?:^|.*;\\s*)" +
-			escape(key).replace(/[\-\.\+\*]/g, "\\$&") +
-			"\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
-		return unescape(doc$1.cookie.replace(new RegExp(regexpStr), "$1"))
-	}
+	          var holders = length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder ? [] : replaceHolders(args, placeholder);
+	          length -= holders.length;
 
-	function each$5(callback) {
-		var cookies = doc$1.cookie.split(/; ?/g);
-		for (var i = cookies.length - 1; i >= 0; i--) {
-			if (!trim$1(cookies[i])) {
-				continue
-			}
-			var kvp = cookies[i].split('=');
-			var key = unescape(kvp[0]);
-			var val = unescape(kvp[1]);
-			callback(val, key);
-		}
-	}
+	          if (length < arity) {
+	            return createRecurry(func, bitmask, createHybrid, wrapper.placeholder, undefined$1, args, holders, undefined$1, undefined$1, arity - length);
+	          }
 
-	function write$3(key, data) {
-		if(!key) { return }
-		doc$1.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
-	}
+	          var fn = this && this !== root && this instanceof wrapper ? Ctor : func;
+	          return apply(fn, this, args);
+	        }
 
-	function remove$5(key) {
-		if (!key || !_has(key)) {
-			return
-		}
-		doc$1.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
-	}
+	        return wrapper;
+	      }
+	      /**
+	       * Creates a `_.find` or `_.findLast` function.
+	       *
+	       * @private
+	       * @param {Function} findIndexFunc The function to find the collection index.
+	       * @returns {Function} Returns the new find function.
+	       */
 
-	function clearAll$3() {
-		each$5(function(_, key) {
-			remove$5(key);
-		});
-	}
 
-	function _has(key) {
-		return (new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=")).test(doc$1.cookie)
-	}
+	      function createFind(findIndexFunc) {
+	        return function (collection, predicate, fromIndex) {
+	          var iterable = Object(collection);
 
-	var Global$5 = util.Global;
+	          if (!isArrayLike(collection)) {
+	            var iteratee = getIteratee(predicate, 3);
+	            collection = keys(collection);
 
-	var sessionStorage_1 = {
-		name: 'sessionStorage',
-		read: read$4,
-		write: write$4,
-		each: each$6,
-		remove: remove$6,
-		clearAll: clearAll$4
-	};
+	            predicate = function predicate(key) {
+	              return iteratee(iterable[key], key, iterable);
+	            };
+	          }
 
-	function sessionStorage() {
-		return Global$5.sessionStorage
-	}
+	          var index = findIndexFunc(collection, predicate, fromIndex);
+	          return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined$1;
+	        };
+	      }
+	      /**
+	       * Creates a `_.flow` or `_.flowRight` function.
+	       *
+	       * @private
+	       * @param {boolean} [fromRight] Specify iterating from right to left.
+	       * @returns {Function} Returns the new flow function.
+	       */
 
-	function read$4(key) {
-		return sessionStorage().getItem(key)
-	}
 
-	function write$4(key, data) {
-		return sessionStorage().setItem(key, data)
-	}
+	      function createFlow(fromRight) {
+	        return flatRest(function (funcs) {
+	          var length = funcs.length,
+	              index = length,
+	              prereq = LodashWrapper.prototype.thru;
 
-	function each$6(fn) {
-		for (var i = sessionStorage().length - 1; i >= 0; i--) {
-			var key = sessionStorage().key(i);
-			fn(read$4(key), key);
-		}
-	}
+	          if (fromRight) {
+	            funcs.reverse();
+	          }
 
-	function remove$6(key) {
-		return sessionStorage().removeItem(key)
-	}
+	          while (index--) {
+	            var func = funcs[index];
 
-	function clearAll$4() {
-		return sessionStorage().clear()
-	}
+	            if (typeof func != 'function') {
+	              throw new TypeError(FUNC_ERROR_TEXT);
+	            }
 
-	// memoryStorage is a useful last fallback to ensure that the store
-	// is functions (meaning store.get(), store.set(), etc will all function).
-	// However, stored values will not persist when the browser navigates to
-	// a new page or reloads the current page.
+	            if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
+	              var wrapper = new LodashWrapper([], true);
+	            }
+	          }
 
-	var memoryStorage_1 = {
-		name: 'memoryStorage',
-		read: read$5,
-		write: write$5,
-		each: each$7,
-		remove: remove$7,
-		clearAll: clearAll$5,
-	};
+	          index = wrapper ? index : length;
 
-	var memoryStorage = {};
+	          while (++index < length) {
+	            func = funcs[index];
+	            var funcName = getFuncName(func),
+	                data = funcName == 'wrapper' ? getData(func) : undefined$1;
 
-	function read$5(key) {
-		return memoryStorage[key]
-	}
+	            if (data && isLaziable(data[0]) && data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) && !data[4].length && data[9] == 1) {
+	              wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
+	            } else {
+	              wrapper = func.length == 1 && isLaziable(func) ? wrapper[funcName]() : wrapper.thru(func);
+	            }
+	          }
 
-	function write$5(key, data) {
-		memoryStorage[key] = data;
-	}
+	          return function () {
+	            var args = arguments,
+	                value = args[0];
 
-	function each$7(callback) {
-		for (var key in memoryStorage) {
-			if (memoryStorage.hasOwnProperty(key)) {
-				callback(memoryStorage[key], key);
-			}
-		}
-	}
+	            if (wrapper && args.length == 1 && isArray(value)) {
+	              return wrapper.plant(value).value();
+	            }
 
-	function remove$7(key) {
-		delete memoryStorage[key];
-	}
+	            var index = 0,
+	                result = length ? funcs[index].apply(this, args) : value;
 
-	function clearAll$5(key) {
-		memoryStorage = {};
-	}
+	            while (++index < length) {
+	              result = funcs[index].call(this, result);
+	            }
 
-	var all = [
-		// Listed in order of usage preference
-		localStorage_1,
-		oldFFGlobalStorage,
-		oldIEUserDataStorage,
-		cookieStorage,
-		sessionStorage_1,
-		memoryStorage_1
-	];
+	            return result;
+	          };
+	        });
+	      }
+	      /**
+	       * Creates a function that wraps `func` to invoke it with optional `this`
+	       * binding of `thisArg`, partial application, and currying.
+	       *
+	       * @private
+	       * @param {Function|string} func The function or method name to wrap.
+	       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+	       * @param {*} [thisArg] The `this` binding of `func`.
+	       * @param {Array} [partials] The arguments to prepend to those provided to
+	       *  the new function.
+	       * @param {Array} [holders] The `partials` placeholder indexes.
+	       * @param {Array} [partialsRight] The arguments to append to those provided
+	       *  to the new function.
+	       * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
+	       * @param {Array} [argPos] The argument positions of the new function.
+	       * @param {number} [ary] The arity cap of `func`.
+	       * @param {number} [arity] The arity of `func`.
+	       * @returns {Function} Returns the new wrapped function.
+	       */
 
-	/* eslint-disable */
 
-	//  json2.js
-	//  2016-10-28
-	//  Public Domain.
-	//  NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
-	//  See http://www.JSON.org/js.html
-	//  This code should be minified before deployment.
-	//  See http://javascript.crockford.com/jsmin.html
+	      function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
+	        var isAry = bitmask & WRAP_ARY_FLAG,
+	            isBind = bitmask & WRAP_BIND_FLAG,
+	            isBindKey = bitmask & WRAP_BIND_KEY_FLAG,
+	            isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG),
+	            isFlip = bitmask & WRAP_FLIP_FLAG,
+	            Ctor = isBindKey ? undefined$1 : createCtor(func);
 
-	//  USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
-	//  NOT CONTROL.
+	        function wrapper() {
+	          var length = arguments.length,
+	              args = Array(length),
+	              index = length;
 
-	//  This file creates a global JSON object containing two methods: stringify
-	//  and parse. This file provides the ES5 JSON capability to ES3 systems.
-	//  If a project might run on IE8 or earlier, then this file should be included.
-	//  This file does nothing on ES5 systems.
+	          while (index--) {
+	            args[index] = arguments[index];
+	          }
 
-	//      JSON.stringify(value, replacer, space)
-	//          value       any JavaScript value, usually an object or array.
-	//          replacer    an optional parameter that determines how object
-	//                      values are stringified for objects. It can be a
-	//                      function or an array of strings.
-	//          space       an optional parameter that specifies the indentation
-	//                      of nested structures. If it is omitted, the text will
-	//                      be packed without extra whitespace. If it is a number,
-	//                      it will specify the number of spaces to indent at each
-	//                      level. If it is a string (such as "\t" or "&nbsp;"),
-	//                      it contains the characters used to indent at each level.
-	//          This method produces a JSON text from a JavaScript value.
-	//          When an object value is found, if the object contains a toJSON
-	//          method, its toJSON method will be called and the result will be
-	//          stringified. A toJSON method does not serialize: it returns the
-	//          value represented by the name/value pair that should be serialized,
-	//          or undefined if nothing should be serialized. The toJSON method
-	//          will be passed the key associated with the value, and this will be
-	//          bound to the value.
+	          if (isCurried) {
+	            var placeholder = getHolder(wrapper),
+	                holdersCount = countHolders(args, placeholder);
+	          }
 
-	//          For example, this would serialize Dates as ISO strings.
+	          if (partials) {
+	            args = composeArgs(args, partials, holders, isCurried);
+	          }
 
-	//              Date.prototype.toJSON = function (key) {
-	//                  function f(n) {
-	//                      // Format integers to have at least two digits.
-	//                      return (n < 10)
-	//                          ? "0" + n
-	//                          : n;
-	//                  }
-	//                  return this.getUTCFullYear()   + "-" +
-	//                       f(this.getUTCMonth() + 1) + "-" +
-	//                       f(this.getUTCDate())      + "T" +
-	//                       f(this.getUTCHours())     + ":" +
-	//                       f(this.getUTCMinutes())   + ":" +
-	//                       f(this.getUTCSeconds())   + "Z";
-	//              };
+	          if (partialsRight) {
+	            args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
+	          }
 
-	//          You can provide an optional replacer method. It will be passed the
-	//          key and value of each member, with this bound to the containing
-	//          object. The value that is returned from your method will be
-	//          serialized. If your method returns undefined, then the member will
-	//          be excluded from the serialization.
+	          length -= holdersCount;
 
-	//          If the replacer parameter is an array of strings, then it will be
-	//          used to select the members to be serialized. It filters the results
-	//          such that only members with keys listed in the replacer array are
-	//          stringified.
+	          if (isCurried && length < arity) {
+	            var newHolders = replaceHolders(args, placeholder);
+	            return createRecurry(func, bitmask, createHybrid, wrapper.placeholder, thisArg, args, newHolders, argPos, ary, arity - length);
+	          }
 
-	//          Values that do not have JSON representations, such as undefined or
-	//          functions, will not be serialized. Such values in objects will be
-	//          dropped; in arrays they will be replaced with null. You can use
-	//          a replacer function to replace those with JSON values.
+	          var thisBinding = isBind ? thisArg : this,
+	              fn = isBindKey ? thisBinding[func] : func;
+	          length = args.length;
 
-	//          JSON.stringify(undefined) returns undefined.
+	          if (argPos) {
+	            args = reorder(args, argPos);
+	          } else if (isFlip && length > 1) {
+	            args.reverse();
+	          }
 
-	//          The optional space parameter produces a stringification of the
-	//          value that is filled with line breaks and indentation to make it
-	//          easier to read.
+	          if (isAry && ary < length) {
+	            args.length = ary;
+	          }
 
-	//          If the space parameter is a non-empty string, then that string will
-	//          be used for indentation. If the space parameter is a number, then
-	//          the indentation will be that many spaces.
+	          if (this && this !== root && this instanceof wrapper) {
+	            fn = Ctor || createCtor(fn);
+	          }
 
-	//          Example:
+	          return fn.apply(thisBinding, args);
+	        }
 
-	//          text = JSON.stringify(["e", {pluribus: "unum"}]);
-	//          // text is '["e",{"pluribus":"unum"}]'
+	        return wrapper;
+	      }
+	      /**
+	       * Creates a function like `_.invertBy`.
+	       *
+	       * @private
+	       * @param {Function} setter The function to set accumulator values.
+	       * @param {Function} toIteratee The function to resolve iteratees.
+	       * @returns {Function} Returns the new inverter function.
+	       */
 
-	//          text = JSON.stringify(["e", {pluribus: "unum"}], null, "\t");
-	//          // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
 
-	//          text = JSON.stringify([new Date()], function (key, value) {
-	//              return this[key] instanceof Date
-	//                  ? "Date(" + this[key] + ")"
-	//                  : value;
-	//          });
-	//          // text is '["Date(---current time---)"]'
+	      function createInverter(setter, toIteratee) {
+	        return function (object, iteratee) {
+	          return baseInverter(object, setter, toIteratee(iteratee), {});
+	        };
+	      }
+	      /**
+	       * Creates a function that performs a mathematical operation on two values.
+	       *
+	       * @private
+	       * @param {Function} operator The function to perform the operation.
+	       * @param {number} [defaultValue] The value used for `undefined` arguments.
+	       * @returns {Function} Returns the new mathematical operation function.
+	       */
 
-	//      JSON.parse(text, reviver)
-	//          This method parses a JSON text to produce an object or array.
-	//          It can throw a SyntaxError exception.
 
-	//          The optional reviver parameter is a function that can filter and
-	//          transform the results. It receives each of the keys and values,
-	//          and its return value is used instead of the original value.
-	//          If it returns what it received, then the structure is not modified.
-	//          If it returns undefined then the member is deleted.
+	      function createMathOperation(operator, defaultValue) {
+	        return function (value, other) {
+	          var result;
 
-	//          Example:
+	          if (value === undefined$1 && other === undefined$1) {
+	            return defaultValue;
+	          }
 
-	//          // Parse the text. Values that look like ISO date strings will
-	//          // be converted to Date objects.
+	          if (value !== undefined$1) {
+	            result = value;
+	          }
 
-	//          myData = JSON.parse(text, function (key, value) {
-	//              var a;
-	//              if (typeof value === "string") {
-	//                  a =
-	//   /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
-	//                  if (a) {
-	//                      return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
-	//                          +a[5], +a[6]));
-	//                  }
-	//              }
-	//              return value;
-	//          });
+	          if (other !== undefined$1) {
+	            if (result === undefined$1) {
+	              return other;
+	            }
 
-	//          myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
-	//              var d;
-	//              if (typeof value === "string" &&
-	//                      value.slice(0, 5) === "Date(" &&
-	//                      value.slice(-1) === ")") {
-	//                  d = new Date(value.slice(5, -1));
-	//                  if (d) {
-	//                      return d;
-	//                  }
-	//              }
-	//              return value;
-	//          });
+	            if (typeof value == 'string' || typeof other == 'string') {
+	              value = baseToString(value);
+	              other = baseToString(other);
+	            } else {
+	              value = baseToNumber(value);
+	              other = baseToNumber(other);
+	            }
 
-	//  This is a reference implementation. You are free to copy, modify, or
-	//  redistribute.
+	            result = operator(value, other);
+	          }
 
-	/*jslint
-	    eval, for, this
-	*/
+	          return result;
+	        };
+	      }
+	      /**
+	       * Creates a function like `_.over`.
+	       *
+	       * @private
+	       * @param {Function} arrayFunc The function to iterate over iteratees.
+	       * @returns {Function} Returns the new over function.
+	       */
 
-	/*property
-	    JSON, apply, call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
-	    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
-	    lastIndex, length, parse, prototype, push, replace, slice, stringify,
-	    test, toJSON, toString, valueOf
-	*/
 
+	      function createOver(arrayFunc) {
+	        return flatRest(function (iteratees) {
+	          iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
+	          return baseRest(function (args) {
+	            var thisArg = this;
+	            return arrayFunc(iteratees, function (iteratee) {
+	              return apply(iteratee, thisArg, args);
+	            });
+	          });
+	        });
+	      }
+	      /**
+	       * Creates the padding for `string` based on `length`. The `chars` string
+	       * is truncated if the number of characters exceeds `length`.
+	       *
+	       * @private
+	       * @param {number} length The padding length.
+	       * @param {string} [chars=' '] The string used as padding.
+	       * @returns {string} Returns the padding for `string`.
+	       */
 
-	// Create a JSON object only if one does not already exist. We create the
-	// methods in a closure to avoid creating global variables.
 
-	if (typeof JSON !== "object") {
-	    JSON = {};
-	}
+	      function createPadding(length, chars) {
+	        chars = chars === undefined$1 ? ' ' : baseToString(chars);
+	        var charsLength = chars.length;
 
-	(function () {
+	        if (charsLength < 2) {
+	          return charsLength ? baseRepeat(chars, length) : chars;
+	        }
 
-	    var rx_one = /^[\],:{}\s]*$/;
-	    var rx_two = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
-	    var rx_three = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
-	    var rx_four = /(?:^|:|,)(?:\s*\[)+/g;
-	    var rx_escapable = /[\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
-	    var rx_dangerous = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+	        var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
+	        return hasUnicode(chars) ? castSlice(stringToArray(result), 0, length).join('') : result.slice(0, length);
+	      }
+	      /**
+	       * Creates a function that wraps `func` to invoke it with the `this` binding
+	       * of `thisArg` and `partials` prepended to the arguments it receives.
+	       *
+	       * @private
+	       * @param {Function} func The function to wrap.
+	       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+	       * @param {*} thisArg The `this` binding of `func`.
+	       * @param {Array} partials The arguments to prepend to those provided to
+	       *  the new function.
+	       * @returns {Function} Returns the new wrapped function.
+	       */
 
-	    function f(n) {
-	        // Format integers to have at least two digits.
-	        return n < 10
-	            ? "0" + n
-	            : n;
-	    }
 
-	    function this_value() {
-	        return this.valueOf();
-	    }
+	      function createPartial(func, bitmask, thisArg, partials) {
+	        var isBind = bitmask & WRAP_BIND_FLAG,
+	            Ctor = createCtor(func);
 
-	    if (typeof Date.prototype.toJSON !== "function") {
+	        function wrapper() {
+	          var argsIndex = -1,
+	              argsLength = arguments.length,
+	              leftIndex = -1,
+	              leftLength = partials.length,
+	              args = Array(leftLength + argsLength),
+	              fn = this && this !== root && this instanceof wrapper ? Ctor : func;
 
-	        Date.prototype.toJSON = function () {
+	          while (++leftIndex < leftLength) {
+	            args[leftIndex] = partials[leftIndex];
+	          }
 
-	            return isFinite(this.valueOf())
-	                ? this.getUTCFullYear() + "-" +
-	                        f(this.getUTCMonth() + 1) + "-" +
-	                        f(this.getUTCDate()) + "T" +
-	                        f(this.getUTCHours()) + ":" +
-	                        f(this.getUTCMinutes()) + ":" +
-	                        f(this.getUTCSeconds()) + "Z"
-	                : null;
-	        };
+	          while (argsLength--) {
+	            args[leftIndex++] = arguments[++argsIndex];
+	          }
 
-	        Boolean.prototype.toJSON = this_value;
-	        Number.prototype.toJSON = this_value;
-	        String.prototype.toJSON = this_value;
-	    }
+	          return apply(fn, isBind ? thisArg : this, args);
+	        }
 
-	    var gap;
-	    var indent;
-	    var meta;
-	    var rep;
+	        return wrapper;
+	      }
+	      /**
+	       * Creates a `_.range` or `_.rangeRight` function.
+	       *
+	       * @private
+	       * @param {boolean} [fromRight] Specify iterating from right to left.
+	       * @returns {Function} Returns the new range function.
+	       */
 
 
-	    function quote(string) {
+	      function createRange(fromRight) {
+	        return function (start, end, step) {
+	          if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
+	            end = step = undefined$1;
+	          } // Ensure the sign of `-0` is preserved.
 
-	// If the string contains no control characters, no quote characters, and no
-	// backslash characters, then we can safely slap some quotes around it.
-	// Otherwise we must also replace the offending characters with safe escape
-	// sequences.
 
-	        rx_escapable.lastIndex = 0;
-	        return rx_escapable.test(string)
-	            ? "\"" + string.replace(rx_escapable, function (a) {
-	                var c = meta[a];
-	                return typeof c === "string"
-	                    ? c
-	                    : "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
-	            }) + "\""
-	            : "\"" + string + "\"";
-	    }
+	          start = toFinite(start);
 
+	          if (end === undefined$1) {
+	            end = start;
+	            start = 0;
+	          } else {
+	            end = toFinite(end);
+	          }
 
-	    function str(key, holder) {
+	          step = step === undefined$1 ? start < end ? 1 : -1 : toFinite(step);
+	          return baseRange(start, end, step, fromRight);
+	        };
+	      }
+	      /**
+	       * Creates a function that performs a relational operation on two values.
+	       *
+	       * @private
+	       * @param {Function} operator The function to perform the operation.
+	       * @returns {Function} Returns the new relational operation function.
+	       */
 
-	// Produce a string from holder[key].
 
-	        var i;          // The loop counter.
-	        var k;          // The member key.
-	        var v;          // The member value.
-	        var length;
-	        var mind = gap;
-	        var partial;
-	        var value = holder[key];
+	      function createRelationalOperation(operator) {
+	        return function (value, other) {
+	          if (!(typeof value == 'string' && typeof other == 'string')) {
+	            value = toNumber(value);
+	            other = toNumber(other);
+	          }
 
-	// If the value has a toJSON method, call it to obtain a replacement value.
+	          return operator(value, other);
+	        };
+	      }
+	      /**
+	       * Creates a function that wraps `func` to continue currying.
+	       *
+	       * @private
+	       * @param {Function} func The function to wrap.
+	       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+	       * @param {Function} wrapFunc The function to create the `func` wrapper.
+	       * @param {*} placeholder The placeholder value.
+	       * @param {*} [thisArg] The `this` binding of `func`.
+	       * @param {Array} [partials] The arguments to prepend to those provided to
+	       *  the new function.
+	       * @param {Array} [holders] The `partials` placeholder indexes.
+	       * @param {Array} [argPos] The argument positions of the new function.
+	       * @param {number} [ary] The arity cap of `func`.
+	       * @param {number} [arity] The arity of `func`.
+	       * @returns {Function} Returns the new wrapped function.
+	       */
 
-	        if (value && typeof value === "object" &&
-	                typeof value.toJSON === "function") {
-	            value = value.toJSON(key);
-	        }
 
-	// If we were called with a replacer function, then call the replacer to
-	// obtain a replacement value.
+	      function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
+	        var isCurry = bitmask & WRAP_CURRY_FLAG,
+	            newHolders = isCurry ? holders : undefined$1,
+	            newHoldersRight = isCurry ? undefined$1 : holders,
+	            newPartials = isCurry ? partials : undefined$1,
+	            newPartialsRight = isCurry ? undefined$1 : partials;
+	        bitmask |= isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG;
+	        bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);
 
-	        if (typeof rep === "function") {
-	            value = rep.call(holder, key, value);
+	        if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {
+	          bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);
 	        }
 
-	// What happens next depends on the value's type.
+	        var newData = [func, bitmask, thisArg, newPartials, newHolders, newPartialsRight, newHoldersRight, argPos, ary, arity];
+	        var result = wrapFunc.apply(undefined$1, newData);
 
-	        switch (typeof value) {
-	        case "string":
-	            return quote(value);
+	        if (isLaziable(func)) {
+	          setData(result, newData);
+	        }
 
-	        case "number":
+	        result.placeholder = placeholder;
+	        return setWrapToString(result, func, bitmask);
+	      }
+	      /**
+	       * Creates a function like `_.round`.
+	       *
+	       * @private
+	       * @param {string} methodName The name of the `Math` method to use when rounding.
+	       * @returns {Function} Returns the new round function.
+	       */
 
-	// JSON numbers must be finite. Encode non-finite numbers as null.
 
-	            return isFinite(value)
-	                ? String(value)
-	                : "null";
+	      function createRound(methodName) {
+	        var func = Math[methodName];
+	        return function (number, precision) {
+	          number = toNumber(number);
+	          precision = precision == null ? 0 : nativeMin(toInteger(precision), 292);
 
-	        case "boolean":
-	        case "null":
+	          if (precision && nativeIsFinite(number)) {
+	            // Shift with exponential notation to avoid floating-point issues.
+	            // See [MDN](https://mdn.io/round#Examples) for more details.
+	            var pair = (toString(number) + 'e').split('e'),
+	                value = func(pair[0] + 'e' + (+pair[1] + precision));
+	            pair = (toString(value) + 'e').split('e');
+	            return +(pair[0] + 'e' + (+pair[1] - precision));
+	          }
 
-	// If the value is a boolean or null, convert it to a string. Note:
-	// typeof null does not produce "null". The case is included here in
-	// the remote chance that this gets fixed someday.
+	          return func(number);
+	        };
+	      }
+	      /**
+	       * Creates a set object of `values`.
+	       *
+	       * @private
+	       * @param {Array} values The values to add to the set.
+	       * @returns {Object} Returns the new set.
+	       */
 
-	            return String(value);
 
-	// If the type is "object", we might be dealing with an object or an array or
-	// null.
+	      var createSet = !(Set && 1 / setToArray(new Set([, -0]))[1] == INFINITY) ? noop : function (values) {
+	        return new Set(values);
+	      };
+	      /**
+	       * Creates a `_.toPairs` or `_.toPairsIn` function.
+	       *
+	       * @private
+	       * @param {Function} keysFunc The function to get the keys of a given object.
+	       * @returns {Function} Returns the new pairs function.
+	       */
 
-	        case "object":
+	      function createToPairs(keysFunc) {
+	        return function (object) {
+	          var tag = getTag(object);
 
-	// Due to a specification blunder in ECMAScript, typeof null is "object",
-	// so watch out for that case.
+	          if (tag == mapTag) {
+	            return mapToArray(object);
+	          }
 
-	            if (!value) {
-	                return "null";
-	            }
+	          if (tag == setTag) {
+	            return setToPairs(object);
+	          }
 
-	// Make an array to hold the partial results of stringifying this object value.
+	          return baseToPairs(object, keysFunc(object));
+	        };
+	      }
+	      /**
+	       * Creates a function that either curries or invokes `func` with optional
+	       * `this` binding and partially applied arguments.
+	       *
+	       * @private
+	       * @param {Function|string} func The function or method name to wrap.
+	       * @param {number} bitmask The bitmask flags.
+	       *    1 - `_.bind`
+	       *    2 - `_.bindKey`
+	       *    4 - `_.curry` or `_.curryRight` of a bound function
+	       *    8 - `_.curry`
+	       *   16 - `_.curryRight`
+	       *   32 - `_.partial`
+	       *   64 - `_.partialRight`
+	       *  128 - `_.rearg`
+	       *  256 - `_.ary`
+	       *  512 - `_.flip`
+	       * @param {*} [thisArg] The `this` binding of `func`.
+	       * @param {Array} [partials] The arguments to be partially applied.
+	       * @param {Array} [holders] The `partials` placeholder indexes.
+	       * @param {Array} [argPos] The argument positions of the new function.
+	       * @param {number} [ary] The arity cap of `func`.
+	       * @param {number} [arity] The arity of `func`.
+	       * @returns {Function} Returns the new wrapped function.
+	       */
 
-	            gap += indent;
-	            partial = [];
 
-	// Is the value an array?
+	      function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
+	        var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;
 
-	            if (Object.prototype.toString.apply(value) === "[object Array]") {
+	        if (!isBindKey && typeof func != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
+	        }
 
-	// The value is an array. Stringify every element. Use null as a placeholder
-	// for non-JSON values.
+	        var length = partials ? partials.length : 0;
 
-	                length = value.length;
-	                for (i = 0; i < length; i += 1) {
-	                    partial[i] = str(i, value) || "null";
-	                }
+	        if (!length) {
+	          bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);
+	          partials = holders = undefined$1;
+	        }
 
-	// Join all of the elements together, separated with commas, and wrap them in
-	// brackets.
+	        ary = ary === undefined$1 ? ary : nativeMax(toInteger(ary), 0);
+	        arity = arity === undefined$1 ? arity : toInteger(arity);
+	        length -= holders ? holders.length : 0;
 
-	                v = partial.length === 0
-	                    ? "[]"
-	                    : gap
-	                        ? "[\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "]"
-	                        : "[" + partial.join(",") + "]";
-	                gap = mind;
-	                return v;
-	            }
+	        if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) {
+	          var partialsRight = partials,
+	              holdersRight = holders;
+	          partials = holders = undefined$1;
+	        }
 
-	// If the replacer is an array, use it to select the members to be stringified.
-
-	            if (rep && typeof rep === "object") {
-	                length = rep.length;
-	                for (i = 0; i < length; i += 1) {
-	                    if (typeof rep[i] === "string") {
-	                        k = rep[i];
-	                        v = str(k, value);
-	                        if (v) {
-	                            partial.push(quote(k) + (
-	                                gap
-	                                    ? ": "
-	                                    : ":"
-	                            ) + v);
-	                        }
-	                    }
-	                }
-	            } else {
+	        var data = isBindKey ? undefined$1 : getData(func);
+	        var newData = [func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity];
 
-	// Otherwise, iterate through all of the keys in the object.
-
-	                for (k in value) {
-	                    if (Object.prototype.hasOwnProperty.call(value, k)) {
-	                        v = str(k, value);
-	                        if (v) {
-	                            partial.push(quote(k) + (
-	                                gap
-	                                    ? ": "
-	                                    : ":"
-	                            ) + v);
-	                        }
-	                    }
-	                }
-	            }
+	        if (data) {
+	          mergeData(newData, data);
+	        }
 
-	// Join all of the member texts together, separated with commas,
-	// and wrap them in braces.
+	        func = newData[0];
+	        bitmask = newData[1];
+	        thisArg = newData[2];
+	        partials = newData[3];
+	        holders = newData[4];
+	        arity = newData[9] = newData[9] === undefined$1 ? isBindKey ? 0 : func.length : nativeMax(newData[9] - length, 0);
 
-	            v = partial.length === 0
-	                ? "{}"
-	                : gap
-	                    ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}"
-	                    : "{" + partial.join(",") + "}";
-	            gap = mind;
-	            return v;
+	        if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) {
+	          bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG);
 	        }
-	    }
 
-	// If the JSON object does not yet have a stringify method, give it one.
+	        if (!bitmask || bitmask == WRAP_BIND_FLAG) {
+	          var result = createBind(func, bitmask, thisArg);
+	        } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) {
+	          result = createCurry(func, bitmask, arity);
+	        } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) {
+	          result = createPartial(func, bitmask, thisArg, partials);
+	        } else {
+	          result = createHybrid.apply(undefined$1, newData);
+	        }
 
-	    if (typeof JSON.stringify !== "function") {
-	        meta = {    // table of character substitutions
-	            "\b": "\\b",
-	            "\t": "\\t",
-	            "\n": "\\n",
-	            "\f": "\\f",
-	            "\r": "\\r",
-	            "\"": "\\\"",
-	            "\\": "\\\\"
-	        };
-	        JSON.stringify = function (value, replacer, space) {
+	        var setter = data ? baseSetData : setData;
+	        return setWrapToString(setter(result, newData), func, bitmask);
+	      }
+	      /**
+	       * Used by `_.defaults` to customize its `_.assignIn` use to assign properties
+	       * of source objects to the destination object for all destination properties
+	       * that resolve to `undefined`.
+	       *
+	       * @private
+	       * @param {*} objValue The destination value.
+	       * @param {*} srcValue The source value.
+	       * @param {string} key The key of the property to assign.
+	       * @param {Object} object The parent object of `objValue`.
+	       * @returns {*} Returns the value to assign.
+	       */
 
-	// The stringify method takes a value and an optional replacer, and an optional
-	// space parameter, and returns a JSON text. The replacer can be a function
-	// that can replace values, or an array of strings that will select the keys.
-	// A default replacer method can be provided. Use of the space parameter can
-	// produce text that is more easily readable.
 
-	            var i;
-	            gap = "";
-	            indent = "";
+	      function customDefaultsAssignIn(objValue, srcValue, key, object) {
+	        if (objValue === undefined$1 || eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key)) {
+	          return srcValue;
+	        }
 
-	// If the space parameter is a number, make an indent string containing that
-	// many spaces.
+	        return objValue;
+	      }
+	      /**
+	       * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source
+	       * objects into destination objects that are passed thru.
+	       *
+	       * @private
+	       * @param {*} objValue The destination value.
+	       * @param {*} srcValue The source value.
+	       * @param {string} key The key of the property to merge.
+	       * @param {Object} object The parent object of `objValue`.
+	       * @param {Object} source The parent object of `srcValue`.
+	       * @param {Object} [stack] Tracks traversed source values and their merged
+	       *  counterparts.
+	       * @returns {*} Returns the value to assign.
+	       */
 
-	            if (typeof space === "number") {
-	                for (i = 0; i < space; i += 1) {
-	                    indent += " ";
-	                }
 
-	// If the space parameter is a string, it will be used as the indent string.
+	      function customDefaultsMerge(objValue, srcValue, key, object, source, stack) {
+	        if (isObject(objValue) && isObject(srcValue)) {
+	          // Recursively merge objects and arrays (susceptible to call stack limits).
+	          stack.set(srcValue, objValue);
+	          baseMerge(objValue, srcValue, undefined$1, customDefaultsMerge, stack);
+	          stack['delete'](srcValue);
+	        }
 
-	            } else if (typeof space === "string") {
-	                indent = space;
-	            }
+	        return objValue;
+	      }
+	      /**
+	       * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain
+	       * objects.
+	       *
+	       * @private
+	       * @param {*} value The value to inspect.
+	       * @param {string} key The key of the property to inspect.
+	       * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`.
+	       */
 
-	// If there is a replacer, it must be a function or an array.
-	// Otherwise, throw an error.
 
-	            rep = replacer;
-	            if (replacer && typeof replacer !== "function" &&
-	                    (typeof replacer !== "object" ||
-	                    typeof replacer.length !== "number")) {
-	                throw new Error("JSON.stringify");
-	            }
+	      function customOmitClone(value) {
+	        return isPlainObject(value) ? undefined$1 : value;
+	      }
+	      /**
+	       * A specialized version of `baseIsEqualDeep` for arrays with support for
+	       * partial deep comparisons.
+	       *
+	       * @private
+	       * @param {Array} array The array to compare.
+	       * @param {Array} other The other array to compare.
+	       * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+	       * @param {Function} customizer The function to customize comparisons.
+	       * @param {Function} equalFunc The function to determine equivalents of values.
+	       * @param {Object} stack Tracks traversed `array` and `other` objects.
+	       * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+	       */
 
-	// Make a fake root object containing our value under the key of "".
-	// Return the result of stringifying the value.
 
-	            return str("", {"": value});
-	        };
-	    }
+	      function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
+	        var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
+	            arrLength = array.length,
+	            othLength = other.length;
+
+	        if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+	          return false;
+	        } // Check that cyclic values are equal.
 
 
-	// If the JSON object does not yet have a parse method, give it one.
+	        var arrStacked = stack.get(array);
+	        var othStacked = stack.get(other);
 
-	    if (typeof JSON.parse !== "function") {
-	        JSON.parse = function (text, reviver) {
+	        if (arrStacked && othStacked) {
+	          return arrStacked == other && othStacked == array;
+	        }
 
-	// The parse method takes a text and an optional reviver function, and returns
-	// a JavaScript value if the text is a valid JSON text.
+	        var index = -1,
+	            result = true,
+	            seen = bitmask & COMPARE_UNORDERED_FLAG ? new SetCache() : undefined$1;
+	        stack.set(array, other);
+	        stack.set(other, array); // Ignore non-index properties.
 
-	            var j;
+	        while (++index < arrLength) {
+	          var arrValue = array[index],
+	              othValue = other[index];
 
-	            function walk(holder, key) {
-
-	// The walk method is used to recursively walk the resulting structure so
-	// that modifications can be made.
-
-	                var k;
-	                var v;
-	                var value = holder[key];
-	                if (value && typeof value === "object") {
-	                    for (k in value) {
-	                        if (Object.prototype.hasOwnProperty.call(value, k)) {
-	                            v = walk(value, k);
-	                            if (v !== undefined) {
-	                                value[k] = v;
-	                            } else {
-	                                delete value[k];
-	                            }
-	                        }
-	                    }
-	                }
-	                return reviver.call(holder, key, value);
+	          if (customizer) {
+	            var compared = isPartial ? customizer(othValue, arrValue, index, other, array, stack) : customizer(arrValue, othValue, index, array, other, stack);
+	          }
+
+	          if (compared !== undefined$1) {
+	            if (compared) {
+	              continue;
 	            }
 
+	            result = false;
+	            break;
+	          } // Recursively compare arrays (susceptible to call stack limits).
 
-	// Parsing happens in four stages. In the first stage, we replace certain
-	// Unicode characters with escape sequences. JavaScript handles many characters
-	// incorrectly, either silently deleting them, or treating them as line endings.
 
-	            text = String(text);
-	            rx_dangerous.lastIndex = 0;
-	            if (rx_dangerous.test(text)) {
-	                text = text.replace(rx_dangerous, function (a) {
-	                    return "\\u" +
-	                            ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
-	                });
+	          if (seen) {
+	            if (!arraySome(other, function (othValue, othIndex) {
+	              if (!cacheHas(seen, othIndex) && (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
+	                return seen.push(othIndex);
+	              }
+	            })) {
+	              result = false;
+	              break;
 	            }
+	          } else if (!(arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
+	            result = false;
+	            break;
+	          }
+	        }
+
+	        stack['delete'](array);
+	        stack['delete'](other);
+	        return result;
+	      }
+	      /**
+	       * A specialized version of `baseIsEqualDeep` for comparing objects of
+	       * the same `toStringTag`.
+	       *
+	       * **Note:** This function only supports comparing values with tags of
+	       * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+	       *
+	       * @private
+	       * @param {Object} object The object to compare.
+	       * @param {Object} other The other object to compare.
+	       * @param {string} tag The `toStringTag` of the objects to compare.
+	       * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+	       * @param {Function} customizer The function to customize comparisons.
+	       * @param {Function} equalFunc The function to determine equivalents of values.
+	       * @param {Object} stack Tracks traversed `object` and `other` objects.
+	       * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+	       */
+
 
-	// In the second stage, we run the text against regular expressions that look
-	// for non-JSON patterns. We are especially concerned with "()" and "new"
-	// because they can cause invocation, and "=" because it can cause mutation.
-	// But just to be safe, we want to reject all unexpected forms.
-
-	// We split the second stage into 4 regexp operations in order to work around
-	// crippling inefficiencies in IE's and Safari's regexp engines. First we
-	// replace the JSON backslash pairs with "@" (a non-JSON character). Second, we
-	// replace all simple value tokens with "]" characters. Third, we delete all
-	// open brackets that follow a colon or comma or that begin the text. Finally,
-	// we look to see that the remaining characters are only whitespace or "]" or
-	// "," or ":" or "{" or "}". If that is so, then the text is safe for eval.
-
-	            if (
-	                rx_one.test(
-	                    text
-	                        .replace(rx_two, "@")
-	                        .replace(rx_three, "]")
-	                        .replace(rx_four, "")
-	                )
-	            ) {
-
-	// In the third stage we use the eval function to compile the text into a
-	// JavaScript structure. The "{" operator is subject to a syntactic ambiguity
-	// in JavaScript: it can begin a block or an object literal. We wrap the text
-	// in parens to eliminate the ambiguity.
-
-	                j = eval("(" + text + ")");
-
-	// In the optional fourth stage, we recursively walk the new structure, passing
-	// each name/value pair to a reviver function for possible transformation.
-
-	                return (typeof reviver === "function")
-	                    ? walk({"": j}, "")
-	                    : j;
+	      function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
+	        switch (tag) {
+	          case dataViewTag:
+	            if (object.byteLength != other.byteLength || object.byteOffset != other.byteOffset) {
+	              return false;
 	            }
 
-	// If the text is not JSON parseable, then a SyntaxError is thrown.
+	            object = object.buffer;
+	            other = other.buffer;
 
-	            throw new SyntaxError("JSON.parse");
-	        };
-	    }
-	}());
+	          case arrayBufferTag:
+	            if (object.byteLength != other.byteLength || !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+	              return false;
+	            }
 
-	var json2 = json2Plugin;
+	            return true;
 
-	function json2Plugin() {
-		
-		return {}
-	}
+	          case boolTag:
+	          case dateTag:
+	          case numberTag:
+	            // Coerce booleans to `1` or `0` and dates to milliseconds.
+	            // Invalid dates are coerced to `NaN`.
+	            return eq(+object, +other);
 
-	var plugins = [json2];
+	          case errorTag:
+	            return object.name == other.name && object.message == other.message;
 
-	var store_legacy = storeEngine.createStore(all, plugins);
+	          case regexpTag:
+	          case stringTag:
+	            // Coerce regexes to strings and treat strings, primitives and objects,
+	            // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
+	            // for more details.
+	            return object == other + '';
 
-	// # osm-auth
-	//
-	// This code is only compatible with IE10+ because the [XDomainRequest](http://bit.ly/LfO7xo)
-	// object, IE<10's idea of [CORS](http://en.wikipedia.org/wiki/Cross-origin_resource_sharing),
-	// does not support custom headers, which this uses everywhere.
-	var osmAuth = function(o) {
+	          case mapTag:
+	            var convert = mapToArray;
 
-	    var oauth = {};
+	          case setTag:
+	            var isPartial = bitmask & COMPARE_PARTIAL_FLAG;
+	            convert || (convert = setToArray);
 
-	    // authenticated users will also have a request token secret, but it's
-	    // not used in transactions with the server
-	    oauth.authenticated = function() {
-	        return !!(token('oauth_token') && token('oauth_token_secret'));
-	    };
+	            if (object.size != other.size && !isPartial) {
+	              return false;
+	            } // Assume cyclic values are equal.
 
-	    oauth.logout = function() {
-	        token('oauth_token', '');
-	        token('oauth_token_secret', '');
-	        token('oauth_request_token_secret', '');
-	        return oauth;
-	    };
 
-	    // TODO: detect lack of click event
-	    oauth.authenticate = function(callback) {
-	        if (oauth.authenticated()) { return callback(); }
-
-	        oauth.logout();
-
-	        // ## Getting a request token
-	        var params = timenonce(getAuth(o)),
-	            url = o.url + '/oauth/request_token';
-
-	        params.oauth_signature = ohauth_1.signature(
-	            o.oauth_secret, '',
-	            ohauth_1.baseString('POST', url, params));
-
-	        if (!o.singlepage) {
-	            // Create a 600x550 popup window in the center of the screen
-	            var w = 600, h = 550,
-	                settings = [
-	                    ['width', w], ['height', h],
-	                    ['left', screen.width / 2 - w / 2],
-	                    ['top', screen.height / 2 - h / 2]].map(function(x) {
-	                        return x.join('=');
-	                    }).join(','),
-	                popup = window.open('about:blank', 'oauth_window', settings);
-	        }
-
-	        // Request a request token. When this is complete, the popup
-	        // window is redirected to OSM's authorization page.
-	        ohauth_1.xhr('POST', url, params, null, {}, reqTokenDone);
-	        o.loading();
-
-	        function reqTokenDone(err, xhr) {
-	            o.done();
-	            if (err) { return callback(err); }
-	            var resp = ohauth_1.stringQs(xhr.response);
-	            token('oauth_request_token_secret', resp.oauth_token_secret);
-	            var authorize_url = o.url + '/oauth/authorize?' + ohauth_1.qsString({
-	                oauth_token: resp.oauth_token,
-	                oauth_callback: resolveUrl$1(o.landing)
-	            });
+	            var stacked = stack.get(object);
 
-	            if (o.singlepage) {
-	                location.href = authorize_url;
-	            } else {
-	                popup.location = authorize_url;
+	            if (stacked) {
+	              return stacked == other;
 	            }
-	        }
-
-	        // Called by a function in a landing page, in the popup window. The
-	        // window closes itself.
-	        window.authComplete = function(token) {
-	            var oauth_token = ohauth_1.stringQs(token.split('?')[1]);
-	            get_access_token(oauth_token.oauth_token);
-	            delete window.authComplete;
-	        };
 
-	        // ## Getting an request token
-	        //
-	        // At this point we have an `oauth_token`, brought in from a function
-	        // call on a landing page popup.
-	        function get_access_token(oauth_token) {
-	            var url = o.url + '/oauth/access_token',
-	                params = timenonce(getAuth(o)),
-	                request_token_secret = token('oauth_request_token_secret');
-	            params.oauth_token = oauth_token;
-	            params.oauth_signature = ohauth_1.signature(
-	                o.oauth_secret,
-	                request_token_secret,
-	                ohauth_1.baseString('POST', url, params));
-
-	            // ## Getting an access token
-	            //
-	            // The final token required for authentication. At this point
-	            // we have a `request token secret`
-	            ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-	            o.loading();
-	        }
-
-	        function accessTokenDone(err, xhr) {
-	            o.done();
-	            if (err) { return callback(err); }
-	            var access_token = ohauth_1.stringQs(xhr.response);
-	            token('oauth_token', access_token.oauth_token);
-	            token('oauth_token_secret', access_token.oauth_token_secret);
-	            callback(null, oauth);
-	        }
-	    };
+	            bitmask |= COMPARE_UNORDERED_FLAG; // Recursively compare objects (susceptible to call stack limits).
 
-	    oauth.bootstrapToken = function(oauth_token, callback) {
-	        // ## Getting an request token
-	        // At this point we have an `oauth_token`, brought in from a function
-	        // call on a landing page popup.
-	        function get_access_token(oauth_token) {
-	            var url = o.url + '/oauth/access_token',
-	                params = timenonce(getAuth(o)),
-	                request_token_secret = token('oauth_request_token_secret');
-	            params.oauth_token = oauth_token;
-	            params.oauth_signature = ohauth_1.signature(
-	                o.oauth_secret,
-	                request_token_secret,
-	                ohauth_1.baseString('POST', url, params));
-
-	            // ## Getting an access token
-	            // The final token required for authentication. At this point
-	            // we have a `request token secret`
-	            ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-	            o.loading();
-	        }
-
-	        function accessTokenDone(err, xhr) {
-	            o.done();
-	            if (err) { return callback(err); }
-	            var access_token = ohauth_1.stringQs(xhr.response);
-	            token('oauth_token', access_token.oauth_token);
-	            token('oauth_token_secret', access_token.oauth_token_secret);
-	            callback(null, oauth);
-	        }
-
-	        get_access_token(oauth_token);
-	    };
+	            stack.set(object, other);
+	            var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
+	            stack['delete'](object);
+	            return result;
 
-	    // # xhr
-	    //
-	    // A single XMLHttpRequest wrapper that does authenticated calls if the
-	    // user has logged in.
-	    oauth.xhr = function(options, callback) {
-	        if (!oauth.authenticated()) {
-	            if (o.auto) {
-	                return oauth.authenticate(run);
-	            } else {
-	                callback('not authenticated', null);
-	                return;
-	            }
-	        } else {
-	            return run();
-	        }
-
-	        function run() {
-	            var params = timenonce(getAuth(o)),
-	                oauth_token_secret = token('oauth_token_secret'),
-	                url = (options.prefix !== false) ? o.url + options.path : options.path,
-	                url_parts = url.replace(/#.*$/, '').split('?', 2),
-	                base_url = url_parts[0],
-	                query = (url_parts.length === 2) ? url_parts[1] : '';
-
-	            // https://tools.ietf.org/html/rfc5849#section-3.4.1.3.1
-	            if ((!options.options || !options.options.header ||
-	                options.options.header['Content-Type'] === 'application/x-www-form-urlencoded') &&
-	                options.content) {
-	                params = immutable(params, ohauth_1.stringQs(options.content));
+	          case symbolTag:
+	            if (symbolValueOf) {
+	              return symbolValueOf.call(object) == symbolValueOf.call(other);
 	            }
 
-	            params.oauth_token = token('oauth_token');
-	            params.oauth_signature = ohauth_1.signature(
-	                o.oauth_secret,
-	                oauth_token_secret,
-	                ohauth_1.baseString(options.method, base_url, immutable(params, ohauth_1.stringQs(query)))
-	            );
-
-	            return ohauth_1.xhr(options.method, url, params, options.content, options.options, done);
 	        }
 
-	        function done(err, xhr) {
-	            if (err) { return callback(err); }
-	            else if (xhr.responseXML) { return callback(err, xhr.responseXML); }
-	            else { return callback(err, xhr.response); }
-	        }
-	    };
+	        return false;
+	      }
+	      /**
+	       * A specialized version of `baseIsEqualDeep` for objects with support for
+	       * partial deep comparisons.
+	       *
+	       * @private
+	       * @param {Object} object The object to compare.
+	       * @param {Object} other The other object to compare.
+	       * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+	       * @param {Function} customizer The function to customize comparisons.
+	       * @param {Function} equalFunc The function to determine equivalents of values.
+	       * @param {Object} stack Tracks traversed `object` and `other` objects.
+	       * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+	       */
 
-	    // pre-authorize this object, if we can just get a token and token_secret
-	    // from the start
-	    oauth.preauth = function(c) {
-	        if (!c) { return; }
-	        if (c.oauth_token) { token('oauth_token', c.oauth_token); }
-	        if (c.oauth_token_secret) { token('oauth_token_secret', c.oauth_token_secret); }
-	        return oauth;
-	    };
 
-	    oauth.options = function(_) {
-	        if (!arguments.length) { return o; }
+	      function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
+	        var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
+	            objProps = getAllKeys(object),
+	            objLength = objProps.length,
+	            othProps = getAllKeys(other),
+	            othLength = othProps.length;
 
-	        o = _;
-	        o.url = o.url || 'https://www.openstreetmap.org';
-	        o.landing = o.landing || 'land.html';
-	        o.singlepage = o.singlepage || false;
+	        if (objLength != othLength && !isPartial) {
+	          return false;
+	        }
 
-	        // Optional loading and loading-done functions for nice UI feedback.
-	        // by default, no-ops
-	        o.loading = o.loading || function() {};
-	        o.done = o.done || function() {};
+	        var index = objLength;
 
-	        return oauth.preauth(o);
-	    };
+	        while (index--) {
+	          var key = objProps[index];
 
-	    // 'stamp' an authentication object from `getAuth()`
-	    // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
-	    // and timestamp
-	    function timenonce(o) {
-	        o.oauth_timestamp = ohauth_1.timestamp();
-	        o.oauth_nonce = ohauth_1.nonce();
-	        return o;
-	    }
+	          if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
+	            return false;
+	          }
+	        } // Check that cyclic values are equal.
 
-	    // get/set tokens. These are prefixed with the base URL so that `osm-auth`
-	    // can be used with multiple APIs and the keys in `localStorage`
-	    // will not clash
-	    var token;
 
-	    if (store_legacy.enabled) {
-	        token = function (x, y) {
-	            if (arguments.length === 1) { return store_legacy.get(o.url + x); }
-	            else if (arguments.length === 2) { return store_legacy.set(o.url + x, y); }
-	        };
-	    } else {
-	        var storage = {};
-	        token = function (x, y) {
-	            if (arguments.length === 1) { return storage[o.url + x]; }
-	            else if (arguments.length === 2) { return storage[o.url + x] = y; }
-	        };
-	    }
+	        var objStacked = stack.get(object);
+	        var othStacked = stack.get(other);
 
-	    // Get an authentication object. If you just add and remove properties
-	    // from a single object, you'll need to use `delete` to make sure that
-	    // it doesn't contain undesired properties for authentication
-	    function getAuth(o) {
-	        return {
-	            oauth_consumer_key: o.oauth_consumer_key,
-	            oauth_signature_method: 'HMAC-SHA1'
-	        };
-	    }
+	        if (objStacked && othStacked) {
+	          return objStacked == other && othStacked == object;
+	        }
 
-	    // potentially pre-authorize
-	    oauth.options(o);
+	        var result = true;
+	        stack.set(object, other);
+	        stack.set(other, object);
+	        var skipCtor = isPartial;
 
-	    return oauth;
-	};
+	        while (++index < objLength) {
+	          key = objProps[index];
+	          var objValue = object[key],
+	              othValue = other[key];
 
-	var JXON = new (function () {
-	  var
-	    sValueProp = 'keyValue', sAttributesProp = 'keyAttributes', sAttrPref = '@', /* you can customize these values */
-	    aCache = [], rIsNull = /^\s*$/, rIsBool = /^(?:true|false)$/i;
+	          if (customizer) {
+	            var compared = isPartial ? customizer(othValue, objValue, key, other, object, stack) : customizer(objValue, othValue, key, object, other, stack);
+	          } // Recursively compare objects (susceptible to call stack limits).
 
-	  function parseText (sValue) {
-	    if (rIsNull.test(sValue)) { return null; }
-	    if (rIsBool.test(sValue)) { return sValue.toLowerCase() === 'true'; }
-	    if (isFinite(sValue)) { return parseFloat(sValue); }
-	    if (isFinite(Date.parse(sValue))) { return new Date(sValue); }
-	    return sValue;
-	  }
 
-	  function EmptyTree () { }
-	  EmptyTree.prototype.toString = function () { return 'null'; };
-	  EmptyTree.prototype.valueOf = function () { return null; };
+	          if (!(compared === undefined$1 ? objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack) : compared)) {
+	            result = false;
+	            break;
+	          }
 
-	  function objectify (vValue) {
-	    return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
-	  }
+	          skipCtor || (skipCtor = key == 'constructor');
+	        }
 
-	  function createObjTree (oParentNode, nVerb, bFreeze, bNesteAttr) {
-	    var
-	      nLevelStart = aCache.length, bChildren = oParentNode.hasChildNodes(),
-	      bAttributes = oParentNode.hasAttributes(), bHighVerb = Boolean(nVerb & 2);
+	        if (result && !skipCtor) {
+	          var objCtor = object.constructor,
+	              othCtor = other.constructor; // Non `Object` object instances with different constructors are not equal.
 
-	    var
-	      sProp, vContent, nLength = 0, sCollectedTxt = '',
-	      vResult = bHighVerb ? {} : /* put here the default value for empty nodes: */ true;
+	          if (objCtor != othCtor && 'constructor' in object && 'constructor' in other && !(typeof objCtor == 'function' && objCtor instanceof objCtor && typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+	            result = false;
+	          }
+	        }
 
-	    if (bChildren) {
-	      for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
-	        oNode = oParentNode.childNodes.item(nItem);
-	        if (oNode.nodeType === 4) { sCollectedTxt += oNode.nodeValue; } /* nodeType is 'CDATASection' (4) */
-	        else if (oNode.nodeType === 3) { sCollectedTxt += oNode.nodeValue.trim(); } /* nodeType is 'Text' (3) */
-	        else if (oNode.nodeType === 1 && !oNode.prefix) { aCache.push(oNode); } /* nodeType is 'Element' (1) */
+	        stack['delete'](object);
+	        stack['delete'](other);
+	        return result;
 	      }
-	    }
-
-	    var nLevelEnd = aCache.length, vBuiltVal = parseText(sCollectedTxt);
+	      /**
+	       * A specialized version of `baseRest` which flattens the rest array.
+	       *
+	       * @private
+	       * @param {Function} func The function to apply a rest parameter to.
+	       * @returns {Function} Returns the new function.
+	       */
 
-	    if (!bHighVerb && (bChildren || bAttributes)) { vResult = nVerb === 0 ? objectify(vBuiltVal) : {}; }
 
-	    for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
-	      sProp = aCache[nElId].nodeName.toLowerCase();
-	      vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
-	      if (vResult.hasOwnProperty(sProp)) {
-	        if (vResult[sProp].constructor !== Array) { vResult[sProp] = [vResult[sProp]]; }
-	        vResult[sProp].push(vContent);
-	      } else {
-	        vResult[sProp] = vContent;
-	        nLength++;
+	      function flatRest(func) {
+	        return setToString(overRest(func, undefined$1, flatten), func + '');
 	      }
-	    }
-
-	    if (bAttributes) {
-	      var
-	        nAttrLen = oParentNode.attributes.length,
-	        sAPrefix = bNesteAttr ? '' : sAttrPref, oAttrParent = bNesteAttr ? {} : vResult;
+	      /**
+	       * Creates an array of own enumerable property names and symbols of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property names and symbols.
+	       */
 
-	      for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
-	        oAttrib = oParentNode.attributes.item(nAttrib);
-	        oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
-	      }
 
-	      if (bNesteAttr) {
-	        if (bFreeze) { Object.freeze(oAttrParent); }
-	        vResult[sAttributesProp] = oAttrParent;
-	        nLength -= nAttrLen - 1;
+	      function getAllKeys(object) {
+	        return baseGetAllKeys(object, keys, getSymbols);
 	      }
-	    }
+	      /**
+	       * Creates an array of own and inherited enumerable property names and
+	       * symbols of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property names and symbols.
+	       */
 
-	    if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
-	      vResult[sValueProp] = vBuiltVal;
-	    } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
-	      vResult = vBuiltVal;
-	    }
 
-	    if (bFreeze && (bHighVerb || nLength > 0)) { Object.freeze(vResult); }
+	      function getAllKeysIn(object) {
+	        return baseGetAllKeys(object, keysIn, getSymbolsIn);
+	      }
+	      /**
+	       * Gets metadata for `func`.
+	       *
+	       * @private
+	       * @param {Function} func The function to query.
+	       * @returns {*} Returns the metadata for `func`.
+	       */
 
-	    aCache.length = nLevelStart;
 
-	    return vResult;
-	  }
+	      var getData = !metaMap ? noop : function (func) {
+	        return metaMap.get(func);
+	      };
+	      /**
+	       * Gets the name of `func`.
+	       *
+	       * @private
+	       * @param {Function} func The function to query.
+	       * @returns {string} Returns the function name.
+	       */
 
-	  function loadObjTree (oXMLDoc, oParentEl, oParentObj) {
-	    var vValue, oChild;
+	      function getFuncName(func) {
+	        var result = func.name + '',
+	            array = realNames[result],
+	            length = hasOwnProperty.call(realNames, result) ? array.length : 0;
 
-	    if (oParentObj instanceof String || oParentObj instanceof Number || oParentObj instanceof Boolean) {
-	      oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toString())); /* verbosity level is 0 */
-	    } else if (oParentObj.constructor === Date) {
-	      oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toGMTString()));    
-	    }
+	        while (length--) {
+	          var data = array[length],
+	              otherFunc = data.func;
 
-	    for (var sName in oParentObj) {
-	      vValue = oParentObj[sName];
-	      if (isFinite(sName) || vValue instanceof Function) { continue; } /* verbosity level is 0 */
-	      if (sName === sValueProp) {
-	        if (vValue !== null && vValue !== true) { oParentEl.appendChild(oXMLDoc.createTextNode(vValue.constructor === Date ? vValue.toGMTString() : String(vValue))); }
-	      } else if (sName === sAttributesProp) { /* verbosity level is 3 */
-	        for (var sAttrib in vValue) { oParentEl.setAttribute(sAttrib, vValue[sAttrib]); }
-	      } else if (sName.charAt(0) === sAttrPref) {
-	        oParentEl.setAttribute(sName.slice(1), vValue);
-	      } else if (vValue.constructor === Array) {
-	        for (var nItem = 0; nItem < vValue.length; nItem++) {
-	          oChild = oXMLDoc.createElement(sName);
-	          loadObjTree(oXMLDoc, oChild, vValue[nItem]);
-	          oParentEl.appendChild(oChild);
-	        }
-	      } else {
-	        oChild = oXMLDoc.createElement(sName);
-	        if (vValue instanceof Object) {
-	          loadObjTree(oXMLDoc, oChild, vValue);
-	        } else if (vValue !== null && vValue !== true) {
-	          oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
+	          if (otherFunc == null || otherFunc == func) {
+	            return data.name;
+	          }
 	        }
-	        oParentEl.appendChild(oChild);
-	     }
-	   }
-	  }
-
-	  this.build = function (oXMLParent, nVerbosity /* optional */, bFreeze /* optional */, bNesteAttributes /* optional */) {
-	    var _nVerb = arguments.length > 1 && typeof nVerbosity === 'number' ? nVerbosity & 3 : /* put here the default verbosity level: */ 1;
-	    return createObjTree(oXMLParent, _nVerb, bFreeze || false, arguments.length > 3 ? bNesteAttributes : _nVerb === 3);    
-	  };
 
-	  this.unbuild = function (oObjTree) {    
-	    var oNewDoc = document.implementation.createDocument('', '', null);
-	    loadObjTree(oNewDoc, oNewDoc, oObjTree);
-	    return oNewDoc;
-	  };
+	        return result;
+	      }
+	      /**
+	       * Gets the argument placeholder value for `func`.
+	       *
+	       * @private
+	       * @param {Function} func The function to inspect.
+	       * @returns {*} Returns the placeholder value.
+	       */
 
-	  this.stringify = function (oObjTree) {
-	    return (new XMLSerializer()).serializeToString(JXON.unbuild(oObjTree));
-	  };
-	})();
 
-	// var myObject = JXON.build(doc);
-	// we got our javascript object! try: alert(JSON.stringify(myObject));
+	      function getHolder(func) {
+	        var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
+	        return object.placeholder;
+	      }
+	      /**
+	       * Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
+	       * this function returns the custom method, otherwise it returns `baseIteratee`.
+	       * If arguments are provided, the chosen function is invoked with them and
+	       * its result is returned.
+	       *
+	       * @private
+	       * @param {*} [value] The value to convert to an iteratee.
+	       * @param {number} [arity] The arity of the created iteratee.
+	       * @returns {Function} Returns the chosen function or its result.
+	       */
 
-	// var newDoc = JXON.unbuild(myObject);
-	// we got our Document instance! try: alert((new XMLSerializer()).serializeToString(newDoc));
 
-	var tiler$5 = utilTiler();
-	var dispatch$6 = dispatch('apiStatusChange', 'authLoading', 'authDone', 'change', 'loading', 'loaded', 'loadedNotes');
-	var urlroot = 'https://www.openstreetmap.org';
-	var oauth = osmAuth({
-	    url: urlroot,
-	    oauth_consumer_key: '5A043yRSEugj4DJ5TljuapfnrflWDte8jTOcWLlT',
-	    oauth_secret: 'aB3jKq1TRsCOUrfOIZ6oQMEDmv2ptV76PA54NGLL',
-	    loading: authLoading,
-	    done: authDone
-	});
+	      function getIteratee() {
+	        var result = lodash.iteratee || iteratee;
+	        result = result === iteratee ? baseIteratee : result;
+	        return arguments.length ? result(arguments[0], arguments[1]) : result;
+	      }
+	      /**
+	       * Gets the data for `map`.
+	       *
+	       * @private
+	       * @param {Object} map The map to query.
+	       * @param {string} key The reference key.
+	       * @returns {*} Returns the map data.
+	       */
 
-	var _blacklists = ['.*\.google(apis)?\..*/(vt|kh)[\?/].*([xyz]=.*){3}.*'];
-	var _tileCache = { toLoad: {}, loaded: {}, inflight: {}, seen: {}, rtree: new RBush() };
-	var _noteCache = { toLoad: {}, loaded: {}, inflight: {}, inflightPost: {}, note: {}, closed: {}, rtree: new RBush() };
-	var _userCache = { toLoad: {}, user: {} };
-	var _cachedApiStatus;
-	var _changeset = {};
 
-	var _deferred = new Set();
-	var _connectionID = 1;
-	var _tileZoom$3 = 16;
-	var _noteZoom = 12;
-	var _rateLimitError;
-	var _userChangesets;
-	var _userDetails;
-	var _off;
+	      function getMapData(map, key) {
+	        var data = map.__data__;
+	        return isKeyable(key) ? data[typeof key == 'string' ? 'string' : 'hash'] : data.map;
+	      }
+	      /**
+	       * Gets the property names, values, and compare flags of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the match data of `object`.
+	       */
 
-	// set a default but also load this from the API status
-	var _maxWayNodes = 2000;
 
+	      function getMatchData(object) {
+	        var result = keys(object),
+	            length = result.length;
 
-	function authLoading() {
-	    dispatch$6.call('authLoading');
-	}
+	        while (length--) {
+	          var key = result[length],
+	              value = object[key];
+	          result[length] = [key, value, isStrictComparable(value)];
+	        }
 
+	        return result;
+	      }
+	      /**
+	       * Gets the native function at `key` of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @param {string} key The key of the method to get.
+	       * @returns {*} Returns the function if it's native, else `undefined`.
+	       */
 
-	function authDone() {
-	    dispatch$6.call('authDone');
-	}
 
+	      function getNative(object, key) {
+	        var value = getValue(object, key);
+	        return baseIsNative(value) ? value : undefined$1;
+	      }
+	      /**
+	       * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
+	       *
+	       * @private
+	       * @param {*} value The value to query.
+	       * @returns {string} Returns the raw `toStringTag`.
+	       */
 
-	function abortRequest$5(controllerOrXHR) {
-	    if (controllerOrXHR) {
-	        controllerOrXHR.abort();
-	    }
-	}
 
+	      function getRawTag(value) {
+	        var isOwn = hasOwnProperty.call(value, symToStringTag),
+	            tag = value[symToStringTag];
 
-	function hasInflightRequests(cache) {
-	    return Object.keys(cache.inflight).length;
-	}
+	        try {
+	          value[symToStringTag] = undefined$1;
+	          var unmasked = true;
+	        } catch (e) {}
 
+	        var result = nativeObjectToString.call(value);
 
-	function abortUnwantedRequests$3(cache, visibleTiles) {
-	    Object.keys(cache.inflight).forEach(function(k) {
-	        if (cache.toLoad[k]) { return; }
-	        if (visibleTiles.find(function(tile) { return k === tile.id; })) { return; }
+	        if (unmasked) {
+	          if (isOwn) {
+	            value[symToStringTag] = tag;
+	          } else {
+	            delete value[symToStringTag];
+	          }
+	        }
 
-	        abortRequest$5(cache.inflight[k]);
-	        delete cache.inflight[k];
-	    });
-	}
+	        return result;
+	      }
+	      /**
+	       * Creates an array of the own enumerable symbols of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of symbols.
+	       */
 
 
-	function getLoc(attrs) {
-	    var lon = attrs.lon && attrs.lon.value;
-	    var lat = attrs.lat && attrs.lat.value;
-	    return [parseFloat(lon), parseFloat(lat)];
-	}
+	      var getSymbols = !nativeGetSymbols ? stubArray : function (object) {
+	        if (object == null) {
+	          return [];
+	        }
 
+	        object = Object(object);
+	        return arrayFilter(nativeGetSymbols(object), function (symbol) {
+	          return propertyIsEnumerable.call(object, symbol);
+	        });
+	      };
+	      /**
+	       * Creates an array of the own and inherited enumerable symbols of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of symbols.
+	       */
 
-	function getNodes(obj) {
-	    var elems = obj.getElementsByTagName('nd');
-	    var nodes = new Array(elems.length);
-	    for (var i = 0, l = elems.length; i < l; i++) {
-	        nodes[i] = 'n' + elems[i].attributes.ref.value;
-	    }
-	    return nodes;
-	}
+	      var getSymbolsIn = !nativeGetSymbols ? stubArray : function (object) {
+	        var result = [];
 
-	function getNodesJSON(obj) {
-	    var elems = obj.nodes;
-	    var nodes = new Array(elems.length);
-	    for (var i = 0, l = elems.length; i < l; i++) {
-	        nodes[i] = 'n' + elems[i];
-	    }
-	    return nodes;
-	}
+	        while (object) {
+	          arrayPush(result, getSymbols(object));
+	          object = getPrototype(object);
+	        }
 
-	function getTags(obj) {
-	    var elems = obj.getElementsByTagName('tag');
-	    var tags = {};
-	    for (var i = 0, l = elems.length; i < l; i++) {
-	        var attrs = elems[i].attributes;
-	        tags[attrs.k.value] = attrs.v.value;
-	    }
+	        return result;
+	      };
+	      /**
+	       * Gets the `toStringTag` of `value`.
+	       *
+	       * @private
+	       * @param {*} value The value to query.
+	       * @returns {string} Returns the `toStringTag`.
+	       */
 
-	    return tags;
-	}
+	      var getTag = baseGetTag; // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
 
+	      if (DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag || Map && getTag(new Map()) != mapTag || Promise && getTag(Promise.resolve()) != promiseTag || Set && getTag(new Set()) != setTag || WeakMap && getTag(new WeakMap()) != weakMapTag) {
+	        getTag = function getTag(value) {
+	          var result = baseGetTag(value),
+	              Ctor = result == objectTag ? value.constructor : undefined$1,
+	              ctorString = Ctor ? toSource(Ctor) : '';
 
-	function getMembers(obj) {
-	    var elems = obj.getElementsByTagName('member');
-	    var members = new Array(elems.length);
-	    for (var i = 0, l = elems.length; i < l; i++) {
-	        var attrs = elems[i].attributes;
-	        members[i] = {
-	            id: attrs.type.value[0] + attrs.ref.value,
-	            type: attrs.type.value,
-	            role: attrs.role.value
-	        };
-	    }
-	    return members;
-	}
+	          if (ctorString) {
+	            switch (ctorString) {
+	              case dataViewCtorString:
+	                return dataViewTag;
 
-	function getMembersJSON(obj) {
-	    var elems = obj.members;
-	    var members = new Array(elems.length);
-	    for (var i = 0, l = elems.length; i < l; i++) {
-	        var attrs = elems[i];
-	        members[i] = {
-	            id: attrs.type[0] + attrs.ref,
-	            type: attrs.type,
-	            role: attrs.role
-	        };
-	    }
-	    return members;
-	}
+	              case mapCtorString:
+	                return mapTag;
 
-	function getVisible(attrs) {
-	    return (!attrs.visible || attrs.visible.value !== 'false');
-	}
+	              case promiseCtorString:
+	                return promiseTag;
 
+	              case setCtorString:
+	                return setTag;
 
-	function parseComments(comments) {
-	    var parsedComments = [];
-
-	    // for each comment
-	    for (var i = 0; i < comments.length; i++) {
-	        var comment = comments[i];
-	        if (comment.nodeName === 'comment') {
-	            var childNodes = comment.childNodes;
-	            var parsedComment = {};
-
-	            for (var j = 0; j < childNodes.length; j++) {
-	                var node = childNodes[j];
-	                var nodeName = node.nodeName;
-	                if (nodeName === '#text') { continue; }
-	                parsedComment[nodeName] = node.textContent;
-
-	                if (nodeName === 'uid') {
-	                    var uid = node.textContent;
-	                    if (uid && !_userCache.user[uid]) {
-	                        _userCache.toLoad[uid] = true;
-	                    }
-	                }
+	              case weakMapCtorString:
+	                return weakMapTag;
 	            }
+	          }
 
-	            if (parsedComment) {
-	                parsedComments.push(parsedComment);
-	            }
-	        }
-	    }
-	    return parsedComments;
-	}
+	          return result;
+	        };
+	      }
+	      /**
+	       * Gets the view, applying any `transforms` to the `start` and `end` positions.
+	       *
+	       * @private
+	       * @param {number} start The start of the view.
+	       * @param {number} end The end of the view.
+	       * @param {Array} transforms The transformations to apply to the view.
+	       * @returns {Object} Returns an object containing the `start` and `end`
+	       *  positions of the view.
+	       */
 
 
-	function encodeNoteRtree(note) {
-	    return {
-	        minX: note.loc[0],
-	        minY: note.loc[1],
-	        maxX: note.loc[0],
-	        maxY: note.loc[1],
-	        data: note
-	    };
-	}
+	      function getView(start, end, transforms) {
+	        var index = -1,
+	            length = transforms.length;
 
+	        while (++index < length) {
+	          var data = transforms[index],
+	              size = data.size;
 
-	var jsonparsers = {
+	          switch (data.type) {
+	            case 'drop':
+	              start += size;
+	              break;
 
-	    node: function nodeData(obj, uid) {
-	        return new osmNode({
-	            id:  uid,
-	            visible: typeof obj.visible === 'boolean' ? obj.visible : true,
-	            version: obj.version.toString(),
-	            changeset: obj.changeset.toString(),
-	            timestamp: obj.timestamp,
-	            user: obj.user,
-	            uid: obj.uid.toString(),
-	            loc: [parseFloat(obj.lon), parseFloat(obj.lat)],
-	            tags: obj.tags
-	        });
-	    },
+	            case 'dropRight':
+	              end -= size;
+	              break;
 
-	    way: function wayData(obj, uid) {
-	        return new osmWay({
-	            id:  uid,
-	            visible: typeof obj.visible === 'boolean' ? obj.visible : true,
-	            version: obj.version.toString(),
-	            changeset: obj.changeset.toString(),
-	            timestamp: obj.timestamp,
-	            user: obj.user,
-	            uid: obj.uid.toString(),
-	            tags: obj.tags,
-	            nodes: getNodesJSON(obj)
-	        });
-	    },
+	            case 'take':
+	              end = nativeMin(end, start + size);
+	              break;
 
-	    relation: function relationData(obj, uid) {
-	        return new osmRelation({
-	            id:  uid,
-	            visible: typeof obj.visible === 'boolean' ? obj.visible : true,
-	            version: obj.version.toString(),
-	            changeset: obj.changeset.toString(),
-	            timestamp: obj.timestamp,
-	            user: obj.user,
-	            uid: obj.uid.toString(),
-	            tags: obj.tags,
-	            members: getMembersJSON(obj)
-	        });
-	    }
-	};
+	            case 'takeRight':
+	              start = nativeMax(start, end - size);
+	              break;
+	          }
+	        }
 
-	function parseJSON(payload, callback, options) {
-	    options = Object.assign({ skipSeen: true }, options);
-	    if (!payload)  {
-	        return callback({ message: 'No JSON', status: -1 });
-	    }
+	        return {
+	          'start': start,
+	          'end': end
+	        };
+	      }
+	      /**
+	       * Extracts wrapper details from the `source` body comment.
+	       *
+	       * @private
+	       * @param {string} source The source to inspect.
+	       * @returns {Array} Returns the wrapper details.
+	       */
 
-	    var json = payload;
-	    if (typeof json !== 'object')
-	       { json = JSON.parse(payload); }
 
-	    if (!json.elements)
-	        { return callback({ message: 'No JSON', status: -1 }); }
+	      function getWrapDetails(source) {
+	        var match = source.match(reWrapDetails);
+	        return match ? match[1].split(reSplitDetails) : [];
+	      }
+	      /**
+	       * Checks if `path` exists on `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path to check.
+	       * @param {Function} hasFunc The function to check properties.
+	       * @returns {boolean} Returns `true` if `path` exists, else `false`.
+	       */
 
-	    var children = json.elements;
 
-	    var handle = window.requestIdleCallback(function() {
-	        var results = [];
-	        var result;
-	        for (var i = 0; i < children.length; i++) {
-	            result = parseChild(children[i]);
-	            if (result) { results.push(result); }
-	        }
-	        callback(null, results);
-	    });
+	      function hasPath(object, path, hasFunc) {
+	        path = castPath(path, object);
+	        var index = -1,
+	            length = path.length,
+	            result = false;
 
-	    _deferred.add(handle);
+	        while (++index < length) {
+	          var key = toKey(path[index]);
 
-	    function parseChild(child) {
-	        var parser = jsonparsers[child.type];
-	        if (!parser) { return null; }
+	          if (!(result = object != null && hasFunc(object, key))) {
+	            break;
+	          }
 
-	        var uid;
+	          object = object[key];
+	        }
 
-	        uid = osmEntity.id.fromOSM(child.type, child.id);
-	        if (options.skipSeen) {
-	            if (_tileCache.seen[uid]) { return null; }  // avoid reparsing a "seen" entity
-	            _tileCache.seen[uid] = true;
+	        if (result || ++index != length) {
+	          return result;
 	        }
 
-	        return parser(child, uid);
-	    }
-	}
+	        length = object == null ? 0 : object.length;
+	        return !!length && isLength(length) && isIndex(key, length) && (isArray(object) || isArguments(object));
+	      }
+	      /**
+	       * Initializes an array clone.
+	       *
+	       * @private
+	       * @param {Array} array The array to clone.
+	       * @returns {Array} Returns the initialized clone.
+	       */
 
-	var parsers = {
-	    node: function nodeData(obj, uid) {
-	        var attrs = obj.attributes;
-	        return new osmNode({
-	            id: uid,
-	            visible: getVisible(attrs),
-	            version: attrs.version.value,
-	            changeset: attrs.changeset && attrs.changeset.value,
-	            timestamp: attrs.timestamp && attrs.timestamp.value,
-	            user: attrs.user && attrs.user.value,
-	            uid: attrs.uid && attrs.uid.value,
-	            loc: getLoc(attrs),
-	            tags: getTags(obj)
-	        });
-	    },
 
-	    way: function wayData(obj, uid) {
-	        var attrs = obj.attributes;
-	        return new osmWay({
-	            id: uid,
-	            visible: getVisible(attrs),
-	            version: attrs.version.value,
-	            changeset: attrs.changeset && attrs.changeset.value,
-	            timestamp: attrs.timestamp && attrs.timestamp.value,
-	            user: attrs.user && attrs.user.value,
-	            uid: attrs.uid && attrs.uid.value,
-	            tags: getTags(obj),
-	            nodes: getNodes(obj),
-	        });
-	    },
+	      function initCloneArray(array) {
+	        var length = array.length,
+	            result = new array.constructor(length); // Add properties assigned by `RegExp#exec`.
 
-	    relation: function relationData(obj, uid) {
-	        var attrs = obj.attributes;
-	        return new osmRelation({
-	            id: uid,
-	            visible: getVisible(attrs),
-	            version: attrs.version.value,
-	            changeset: attrs.changeset && attrs.changeset.value,
-	            timestamp: attrs.timestamp && attrs.timestamp.value,
-	            user: attrs.user && attrs.user.value,
-	            uid: attrs.uid && attrs.uid.value,
-	            tags: getTags(obj),
-	            members: getMembers(obj)
-	        });
-	    },
+	        if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
+	          result.index = array.index;
+	          result.input = array.input;
+	        }
 
-	    note: function parseNote(obj, uid) {
-	        var attrs = obj.attributes;
-	        var childNodes = obj.childNodes;
-	        var props = {};
+	        return result;
+	      }
+	      /**
+	       * Initializes an object clone.
+	       *
+	       * @private
+	       * @param {Object} object The object to clone.
+	       * @returns {Object} Returns the initialized clone.
+	       */
 
-	        props.id = uid;
-	        props.loc = getLoc(attrs);
 
-	        // if notes are coincident, move them apart slightly
-	        var coincident = false;
-	        var epsilon = 0.00001;
-	        do {
-	            if (coincident) {
-	                props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
-	            }
-	            var bbox = geoExtent(props.loc).bbox();
-	            coincident = _noteCache.rtree.search(bbox).length;
-	        } while (coincident);
-
-	        // parse note contents
-	        for (var i = 0; i < childNodes.length; i++) {
-	            var node = childNodes[i];
-	            var nodeName = node.nodeName;
-	            if (nodeName === '#text') { continue; }
-
-	            // if the element is comments, parse the comments
-	            if (nodeName === 'comments') {
-	                props[nodeName] = parseComments(node.childNodes);
-	            } else {
-	                props[nodeName] = node.textContent;
-	            }
-	        }
+	      function initCloneObject(object) {
+	        return typeof object.constructor == 'function' && !isPrototype(object) ? baseCreate(getPrototype(object)) : {};
+	      }
+	      /**
+	       * Initializes an object clone based on its `toStringTag`.
+	       *
+	       * **Note:** This function only supports cloning values with tags of
+	       * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.
+	       *
+	       * @private
+	       * @param {Object} object The object to clone.
+	       * @param {string} tag The `toStringTag` of the object to clone.
+	       * @param {boolean} [isDeep] Specify a deep clone.
+	       * @returns {Object} Returns the initialized clone.
+	       */
 
-	        var note = new osmNote(props);
-	        var item = encodeNoteRtree(note);
-	        _noteCache.note[note.id] = note;
-	        _noteCache.rtree.insert(item);
 
-	        return note;
-	    },
+	      function initCloneByTag(object, tag, isDeep) {
+	        var Ctor = object.constructor;
 
-	    user: function parseUser(obj, uid) {
-	        var attrs = obj.attributes;
-	        var user = {
-	            id: uid,
-	            display_name: attrs.display_name && attrs.display_name.value,
-	            account_created: attrs.account_created && attrs.account_created.value,
-	            changesets_count: '0',
-	            active_blocks: '0'
-	        };
+	        switch (tag) {
+	          case arrayBufferTag:
+	            return cloneArrayBuffer(object);
 
-	        var img = obj.getElementsByTagName('img');
-	        if (img && img[0] && img[0].getAttribute('href')) {
-	            user.image_url = img[0].getAttribute('href');
-	        }
+	          case boolTag:
+	          case dateTag:
+	            return new Ctor(+object);
 
-	        var changesets = obj.getElementsByTagName('changesets');
-	        if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
-	            user.changesets_count = changesets[0].getAttribute('count');
-	        }
+	          case dataViewTag:
+	            return cloneDataView(object, isDeep);
 
-	        var blocks = obj.getElementsByTagName('blocks');
-	        if (blocks && blocks[0]) {
-	            var received = blocks[0].getElementsByTagName('received');
-	            if (received && received[0] && received[0].getAttribute('active')) {
-	                user.active_blocks = received[0].getAttribute('active');
-	            }
-	        }
+	          case float32Tag:
+	          case float64Tag:
+	          case int8Tag:
+	          case int16Tag:
+	          case int32Tag:
+	          case uint8Tag:
+	          case uint8ClampedTag:
+	          case uint16Tag:
+	          case uint32Tag:
+	            return cloneTypedArray(object, isDeep);
 
-	        _userCache.user[uid] = user;
-	        delete _userCache.toLoad[uid];
-	        return user;
-	    }
-	};
+	          case mapTag:
+	            return new Ctor();
 
+	          case numberTag:
+	          case stringTag:
+	            return new Ctor(object);
 
-	function parseXML(xml, callback, options) {
-	    options = Object.assign({ skipSeen: true }, options);
-	    if (!xml || !xml.childNodes) {
-	        return callback({ message: 'No XML', status: -1 });
-	    }
+	          case regexpTag:
+	            return cloneRegExp(object);
 
-	    var root = xml.childNodes[0];
-	    var children = root.childNodes;
+	          case setTag:
+	            return new Ctor();
 
-	    var handle = window.requestIdleCallback(function() {
-	        var results = [];
-	        var result;
-	        for (var i = 0; i < children.length; i++) {
-	            result = parseChild(children[i]);
-	            if (result) { results.push(result); }
+	          case symbolTag:
+	            return cloneSymbol(object);
 	        }
-	        callback(null, results);
-	    });
-
-	    _deferred.add(handle);
+	      }
+	      /**
+	       * Inserts wrapper `details` in a comment at the top of the `source` body.
+	       *
+	       * @private
+	       * @param {string} source The source to modify.
+	       * @returns {Array} details The details to insert.
+	       * @returns {string} Returns the modified source.
+	       */
 
 
-	    function parseChild(child) {
-	        var parser = parsers[child.nodeName];
-	        if (!parser) { return null; }
+	      function insertWrapDetails(source, details) {
+	        var length = details.length;
 
-	        var uid;
-	        if (child.nodeName === 'user') {
-	            uid = child.attributes.id.value;
-	            if (options.skipSeen && _userCache.user[uid]) {
-	                delete _userCache.toLoad[uid];
-	                return null;
-	            }
+	        if (!length) {
+	          return source;
+	        }
 
-	        } else if (child.nodeName === 'note') {
-	            uid = child.getElementsByTagName('id')[0].textContent;
+	        var lastIndex = length - 1;
+	        details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
+	        details = details.join(length > 2 ? ', ' : ' ');
+	        return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
+	      }
+	      /**
+	       * Checks if `value` is a flattenable `arguments` object or array.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
+	       */
 
-	        } else {
-	            uid = osmEntity.id.fromOSM(child.nodeName, child.attributes.id.value);
-	            if (options.skipSeen) {
-	                if (_tileCache.seen[uid]) { return null; }  // avoid reparsing a "seen" entity
-	                _tileCache.seen[uid] = true;
-	            }
-	        }
 
-	        return parser(child, uid);
-	    }
-	}
+	      function isFlattenable(value) {
+	        return isArray(value) || isArguments(value) || !!(spreadableSymbol && value && value[spreadableSymbol]);
+	      }
+	      /**
+	       * Checks if `value` is a valid array-like index.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+	       * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+	       */
 
 
-	// replace or remove note from rtree
-	function updateRtree$3(item, replace) {
-	    _noteCache.rtree.remove(item, function isEql(a, b) { return a.data.id === b.data.id; });
+	      function isIndex(value, length) {
+	        var type = _typeof(value);
 
-	    if (replace) {
-	        _noteCache.rtree.insert(item);
-	    }
-	}
+	        length = length == null ? MAX_SAFE_INTEGER : length;
+	        return !!length && (type == 'number' || type != 'symbol' && reIsUint.test(value)) && value > -1 && value % 1 == 0 && value < length;
+	      }
+	      /**
+	       * Checks if the given arguments are from an iteratee call.
+	       *
+	       * @private
+	       * @param {*} value The potential iteratee value argument.
+	       * @param {*} index The potential iteratee index or key argument.
+	       * @param {*} object The potential iteratee object argument.
+	       * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
+	       *  else `false`.
+	       */
 
 
-	function wrapcb(thisArg, callback, cid) {
-	    return function(err, result) {
-	        if (err) {
-	            // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
-	            if (err.status === 400 || err.status === 401 || err.status === 403) {
-	                thisArg.logout();
-	            }
-	            return callback.call(thisArg, err);
+	      function isIterateeCall(value, index, object) {
+	        if (!isObject(object)) {
+	          return false;
+	        }
 
-	        } else if (thisArg.getConnectionId() !== cid) {
-	            return callback.call(thisArg, { message: 'Connection Switched', status: -1 });
+	        var type = _typeof(index);
 
-	        } else {
-	            return callback.call(thisArg, err, result);
+	        if (type == 'number' ? isArrayLike(object) && isIndex(index, object.length) : type == 'string' && index in object) {
+	          return eq(object[index], value);
 	        }
-	    };
-	}
 
+	        return false;
+	      }
+	      /**
+	       * Checks if `value` is a property name and not a property path.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @param {Object} [object] The object to query keys on.
+	       * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+	       */
 
-	var serviceOsm = {
 
-	    init: function() {
-	        utilRebind(this, dispatch$6, 'on');
-	    },
+	      function isKey(value, object) {
+	        if (isArray(value)) {
+	          return false;
+	        }
 
+	        var type = _typeof(value);
 
-	    reset: function() {
-	        Array.from(_deferred).forEach(function(handle) {
-	            window.cancelIdleCallback(handle);
-	            _deferred.delete(handle);
-	        });
+	        if (type == 'number' || type == 'symbol' || type == 'boolean' || value == null || isSymbol(value)) {
+	          return true;
+	        }
 
-	        _connectionID++;
-	        _userChangesets = undefined;
-	        _userDetails = undefined;
-	        _rateLimitError = undefined;
+	        return reIsPlainProp.test(value) || !reIsDeepProp.test(value) || object != null && value in Object(object);
+	      }
+	      /**
+	       * Checks if `value` is suitable for use as unique object key.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+	       */
 
-	        Object.values(_tileCache.inflight).forEach(abortRequest$5);
-	        Object.values(_noteCache.inflight).forEach(abortRequest$5);
-	        Object.values(_noteCache.inflightPost).forEach(abortRequest$5);
-	        if (_changeset.inflight) { abortRequest$5(_changeset.inflight); }
 
-	        _tileCache = { toLoad: {}, loaded: {}, inflight: {}, seen: {}, rtree: new RBush() };
-	        _noteCache = { toLoad: {}, loaded: {}, inflight: {}, inflightPost: {}, note: {}, closed: {}, rtree: new RBush() };
-	        _userCache = { toLoad: {}, user: {} };
-	        _cachedApiStatus = undefined;
-	        _changeset = {};
+	      function isKeyable(value) {
+	        var type = _typeof(value);
 
-	        return this;
-	    },
+	        return type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean' ? value !== '__proto__' : value === null;
+	      }
+	      /**
+	       * Checks if `func` has a lazy counterpart.
+	       *
+	       * @private
+	       * @param {Function} func The function to check.
+	       * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
+	       *  else `false`.
+	       */
 
 
-	    getConnectionId: function() {
-	        return _connectionID;
-	    },
+	      function isLaziable(func) {
+	        var funcName = getFuncName(func),
+	            other = lodash[funcName];
+
+	        if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
+	          return false;
+	        }
 
+	        if (func === other) {
+	          return true;
+	        }
 
-	    changesetURL: function(changesetID) {
-	        return urlroot + '/changeset/' + changesetID;
-	    },
+	        var data = getData(other);
+	        return !!data && func === data[0];
+	      }
+	      /**
+	       * Checks if `func` has its source masked.
+	       *
+	       * @private
+	       * @param {Function} func The function to check.
+	       * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+	       */
 
 
-	    changesetsURL: function(center, zoom) {
-	        var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
-	        return urlroot + '/history#map=' +
-	            Math.floor(zoom) + '/' +
-	            center[1].toFixed(precision) + '/' +
-	            center[0].toFixed(precision);
-	    },
+	      function isMasked(func) {
+	        return !!maskSrcKey && maskSrcKey in func;
+	      }
+	      /**
+	       * Checks if `func` is capable of being masked.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
+	       */
 
 
-	    entityURL: function(entity) {
-	        return urlroot + '/' + entity.type + '/' + entity.osmId();
-	    },
+	      var isMaskable = coreJsData ? isFunction : stubFalse;
+	      /**
+	       * Checks if `value` is likely a prototype object.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+	       */
 
+	      function isPrototype(value) {
+	        var Ctor = value && value.constructor,
+	            proto = typeof Ctor == 'function' && Ctor.prototype || objectProto;
+	        return value === proto;
+	      }
+	      /**
+	       * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+	       *
+	       * @private
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` if suitable for strict
+	       *  equality comparisons, else `false`.
+	       */
 
-	    historyURL: function(entity) {
-	        return urlroot + '/' + entity.type + '/' + entity.osmId() + '/history';
-	    },
 
+	      function isStrictComparable(value) {
+	        return value === value && !isObject(value);
+	      }
+	      /**
+	       * A specialized version of `matchesProperty` for source values suitable
+	       * for strict equality comparisons, i.e. `===`.
+	       *
+	       * @private
+	       * @param {string} key The key of the property to get.
+	       * @param {*} srcValue The value to match.
+	       * @returns {Function} Returns the new spec function.
+	       */
 
-	    userURL: function(username) {
-	        return urlroot + '/user/' + username;
-	    },
 
+	      function matchesStrictComparable(key, srcValue) {
+	        return function (object) {
+	          if (object == null) {
+	            return false;
+	          }
 
-	    noteURL: function(note) {
-	        return urlroot + '/note/' + note.id;
-	    },
+	          return object[key] === srcValue && (srcValue !== undefined$1 || key in Object(object));
+	        };
+	      }
+	      /**
+	       * A specialized version of `_.memoize` which clears the memoized function's
+	       * cache when it exceeds `MAX_MEMOIZE_SIZE`.
+	       *
+	       * @private
+	       * @param {Function} func The function to have its output memoized.
+	       * @returns {Function} Returns the new memoized function.
+	       */
 
 
-	    noteReportURL: function(note) {
-	        return urlroot + '/reports/new?reportable_type=Note&reportable_id=' + note.id;
-	    },
+	      function memoizeCapped(func) {
+	        var result = memoize(func, function (key) {
+	          if (cache.size === MAX_MEMOIZE_SIZE) {
+	            cache.clear();
+	          }
 
+	          return key;
+	        });
+	        var cache = result.cache;
+	        return result;
+	      }
+	      /**
+	       * Merges the function metadata of `source` into `data`.
+	       *
+	       * Merging metadata reduces the number of wrappers used to invoke a function.
+	       * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
+	       * may be applied regardless of execution order. Methods like `_.ary` and
+	       * `_.rearg` modify function arguments, making the order in which they are
+	       * executed important, preventing the merging of metadata. However, we make
+	       * an exception for a safe combined case where curried functions have `_.ary`
+	       * and or `_.rearg` applied.
+	       *
+	       * @private
+	       * @param {Array} data The destination metadata.
+	       * @param {Array} source The source metadata.
+	       * @returns {Array} Returns `data`.
+	       */
 
-	    // Generic method to load data from the OSM API
-	    // Can handle either auth or unauth calls.
-	    loadFromAPI: function(path, callback, options) {
-	        options = Object.assign({ skipSeen: true }, options);
-	        var that = this;
-	        var cid = _connectionID;
 
-	        function done(err, payload) {
-	            if (that.getConnectionId() !== cid) {
-	                if (callback) { callback({ message: 'Connection Switched', status: -1 }); }
-	                return;
-	            }
+	      function mergeData(data, source) {
+	        var bitmask = data[1],
+	            srcBitmask = source[1],
+	            newBitmask = bitmask | srcBitmask,
+	            isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG);
+	        var isCombo = srcBitmask == WRAP_ARY_FLAG && bitmask == WRAP_CURRY_FLAG || srcBitmask == WRAP_ARY_FLAG && bitmask == WRAP_REARG_FLAG && data[7].length <= source[8] || srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG) && source[7].length <= source[8] && bitmask == WRAP_CURRY_FLAG; // Exit early if metadata can't be merged.
 
-	            var isAuthenticated = that.authenticated();
+	        if (!(isCommon || isCombo)) {
+	          return data;
+	        } // Use source `thisArg` if available.
 
-	            // 400 Bad Request, 401 Unauthorized, 403 Forbidden
-	            // Logout and retry the request..
-	            if (isAuthenticated && err && err.status &&
-	                    (err.status === 400 || err.status === 401 || err.status === 403)) {
-	                that.logout();
-	                that.loadFromAPI(path, callback, options);
 
-	            // else, no retry..
-	            } else {
-	                // 509 Bandwidth Limit Exceeded, 429 Too Many Requests
-	                // Set the rateLimitError flag and trigger a warning..
-	                if (!isAuthenticated && !_rateLimitError && err && err.status &&
-	                        (err.status === 509 || err.status === 429)) {
-	                    _rateLimitError = err;
-	                    dispatch$6.call('change');
-	                    that.reloadApiStatus();
-
-	                } else if ((err && _cachedApiStatus === 'online') ||
-	                    (!err && _cachedApiStatus !== 'online')) {
-	                    // If the response's error state doesn't match the status,
-	                    // it's likely we lost or gained the connection so reload the status
-	                    that.reloadApiStatus();
-	                }
+	        if (srcBitmask & WRAP_BIND_FLAG) {
+	          data[2] = source[2]; // Set when currying a bound function.
 
-	                if (callback) {
-	                    if (err) {
-	                        return callback(err);
-	                    } else {
-	                        if (path.indexOf('.json') !== -1) {
-	                            return parseJSON(payload, callback, options);
-	                        } else {
-	                            return parseXML(payload, callback, options);
-	                        }
-	                    }
-	                }
-	            }
-	        }
+	          newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;
+	        } // Compose partial arguments.
 
-	        if (this.authenticated()) {
-	            return oauth.xhr({ method: 'GET', path: path }, done);
-	        } else {
-	            var url = urlroot + path;
-	            var controller = new AbortController();
-	            d3_json(url, { signal: controller.signal })
-	                .then(function(data) {
-	                    done(null, data);
-	                })
-	                .catch(function(err) {
-	                    if (err.name === 'AbortError') { return; }
-	                    // d3-fetch includes status in the error message,
-	                    // but we can't access the response itself
-	                    // https://github.com/d3/d3-fetch/issues/27
-	                    var match = err.message.match(/^\d{3}/);
-	                    if (match) {
-	                        done({ status: +match[0], statusText: err.message });
-	                    } else {
-	                        done(err.message);
-	                    }
-	                });
-	            return controller;
-	        }
-	    },
 
+	        var value = source[3];
 
-	    // Load a single entity by id (ways and relations use the `/full` call)
-	    // GET /api/0.6/node/#id
-	    // GET /api/0.6/[way|relation]/#id/full
-	    loadEntity: function(id, callback) {
-	        var type = osmEntity.id.type(id);
-	        var osmID = osmEntity.id.toOSM(id);
-	        var options = { skipSeen: false };
+	        if (value) {
+	          var partials = data[3];
+	          data[3] = partials ? composeArgs(partials, value, source[4]) : value;
+	          data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
+	        } // Compose partial right arguments.
 
-	        this.loadFromAPI(
-	            '/api/0.6/' + type + '/' + osmID + (type !== 'node' ? '/full' : '') + '.json',
-	            function(err, entities) {
-	                if (callback) { callback(err, { data: entities }); }
-	            },
-	            options
-	        );
-	    },
 
+	        value = source[5];
 
-	    // Load a single entity with a specific version
-	    // GET /api/0.6/[node|way|relation]/#id/#version
-	    loadEntityVersion: function(id, version, callback) {
-	        var type = osmEntity.id.type(id);
-	        var osmID = osmEntity.id.toOSM(id);
-	        var options = { skipSeen: false };
+	        if (value) {
+	          partials = data[5];
+	          data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
+	          data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
+	        } // Use source `argPos` if available.
 
-	        this.loadFromAPI(
-	            '/api/0.6/' + type + '/' + osmID + '/' + version + '.json',
-	            function(err, entities) {
-	                if (callback) { callback(err, { data: entities }); }
-	            },
-	            options
-	        );
-	    },
 
+	        value = source[7];
 
-	    // Load multiple entities in chunks
-	    // (note: callback may be called multiple times)
-	    // Unlike `loadEntity`, child nodes and members are not fetched
-	    // GET /api/0.6/[nodes|ways|relations]?#parameters
-	    loadMultiple: function(ids, callback) {
-	        var that = this;
-	        var groups = utilArrayGroupBy(utilArrayUniq(ids), osmEntity.id.type);
-
-	        Object.keys(groups).forEach(function(k) {
-	            var type = k + 's';   // nodes, ways, relations
-	            var osmIDs = groups[k].map(function(id) { return osmEntity.id.toOSM(id); });
-	            var options = { skipSeen: false };
-
-	            utilArrayChunk(osmIDs, 150).forEach(function(arr) {
-	                that.loadFromAPI(
-	                    '/api/0.6/' + type + '.json?' + type + '=' + arr.join(),
-	                    function(err, entities) {
-	                        if (callback) { callback(err, { data: entities }); }
-	                    },
-	                    options
-	                );
-	            });
-	        });
-	    },
+	        if (value) {
+	          data[7] = value;
+	        } // Use source `ary` if it's smaller.
 
 
-	    // Create, upload, and close a changeset
-	    // PUT /api/0.6/changeset/create
-	    // POST /api/0.6/changeset/#id/upload
-	    // PUT /api/0.6/changeset/#id/close
-	    putChangeset: function(changeset, changes, callback) {
-	        var cid = _connectionID;
+	        if (srcBitmask & WRAP_ARY_FLAG) {
+	          data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
+	        } // Use source `arity` if one is not provided.
 
-	        if (_changeset.inflight) {
-	            return callback({ message: 'Changeset already inflight', status: -2 }, changeset);
 
-	        } else if (_changeset.open) {   // reuse existing open changeset..
-	            return createdChangeset.call(this, null, _changeset.open);
+	        if (data[9] == null) {
+	          data[9] = source[9];
+	        } // Use source `func` and merge bitmasks.
 
-	        } else {   // Open a new changeset..
-	            var options = {
-	                method: 'PUT',
-	                path: '/api/0.6/changeset/create',
-	                options: { header: { 'Content-Type': 'text/xml' } },
-	                content: JXON.stringify(changeset.asJXON())
-	            };
-	            _changeset.inflight = oauth.xhr(
-	                options,
-	                wrapcb(this, createdChangeset, cid)
-	            );
-	        }
 
+	        data[0] = source[0];
+	        data[1] = newBitmask;
+	        return data;
+	      }
+	      /**
+	       * This function is like
+	       * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+	       * except that it includes inherited enumerable properties.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property names.
+	       */
 
-	        function createdChangeset(err, changesetID) {
-	            _changeset.inflight = null;
-	            if (err) { return callback(err, changeset); }
 
-	            _changeset.open = changesetID;
-	            changeset = changeset.update({ id: changesetID });
+	      function nativeKeysIn(object) {
+	        var result = [];
 
-	            // Upload the changeset..
-	            var options = {
-	                method: 'POST',
-	                path: '/api/0.6/changeset/' + changesetID + '/upload',
-	                options: { header: { 'Content-Type': 'text/xml' } },
-	                content: JXON.stringify(changeset.osmChangeJXON(changes))
-	            };
-	            _changeset.inflight = oauth.xhr(
-	                options,
-	                wrapcb(this, uploadedChangeset, cid)
-	            );
-	        }
-
-
-	        function uploadedChangeset(err) {
-	            _changeset.inflight = null;
-	            if (err) { return callback(err, changeset); }
-
-	            // Upload was successful, safe to call the callback.
-	            // Add delay to allow for postgres replication #1646 #2678
-	            window.setTimeout(function() { callback(null, changeset); }, 2500);
-	            _changeset.open = null;
-
-	            // At this point, we don't really care if the connection was switched..
-	            // Only try to close the changeset if we're still talking to the same server.
-	            if (this.getConnectionId() === cid) {
-	                // Still attempt to close changeset, but ignore response because #2667
-	                oauth.xhr({
-	                    method: 'PUT',
-	                    path: '/api/0.6/changeset/' + changeset.id + '/close',
-	                    options: { header: { 'Content-Type': 'text/xml' } }
-	                }, function() { return true; });
-	            }
+	        if (object != null) {
+	          for (var key in Object(object)) {
+	            result.push(key);
+	          }
 	        }
-	    },
 
+	        return result;
+	      }
+	      /**
+	       * Converts `value` to a string using `Object.prototype.toString`.
+	       *
+	       * @private
+	       * @param {*} value The value to convert.
+	       * @returns {string} Returns the converted string.
+	       */
 
-	    // Load multiple users in chunks
-	    // (note: callback may be called multiple times)
-	    // GET /api/0.6/users?users=#id1,#id2,...,#idn
-	    loadUsers: function(uids, callback) {
-	        var toLoad = [];
-	        var cached = [];
 
-	        utilArrayUniq(uids).forEach(function(uid) {
-	            if (_userCache.user[uid]) {
-	                delete _userCache.toLoad[uid];
-	                cached.push(_userCache.user[uid]);
-	            } else {
-	                toLoad.push(uid);
-	            }
-	        });
+	      function objectToString(value) {
+	        return nativeObjectToString.call(value);
+	      }
+	      /**
+	       * A specialized version of `baseRest` which transforms the rest array.
+	       *
+	       * @private
+	       * @param {Function} func The function to apply a rest parameter to.
+	       * @param {number} [start=func.length-1] The start position of the rest parameter.
+	       * @param {Function} transform The rest array transform.
+	       * @returns {Function} Returns the new function.
+	       */
 
-	        if (cached.length || !this.authenticated()) {
-	            callback(undefined, cached);
-	            if (!this.authenticated()) { return; }  // require auth
-	        }
 
-	        utilArrayChunk(toLoad, 150).forEach(function(arr) {
-	            oauth.xhr(
-	                { method: 'GET', path: '/api/0.6/users?users=' + arr.join() },
-	                wrapcb(this, done, _connectionID)
-	            );
-	        }.bind(this));
+	      function overRest(func, start, transform) {
+	        start = nativeMax(start === undefined$1 ? func.length - 1 : start, 0);
+	        return function () {
+	          var args = arguments,
+	              index = -1,
+	              length = nativeMax(args.length - start, 0),
+	              array = Array(length);
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
+	          while (++index < length) {
+	            array[index] = args[start + index];
+	          }
 
-	            var options = { skipSeen: true };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results);
-	                }
-	            }, options);
-	        }
-	    },
+	          index = -1;
+	          var otherArgs = Array(start + 1);
 
+	          while (++index < start) {
+	            otherArgs[index] = args[index];
+	          }
 
-	    // Load a given user by id
-	    // GET /api/0.6/user/#id
-	    loadUser: function(uid, callback) {
-	        if (_userCache.user[uid] || !this.authenticated()) {   // require auth
-	            delete _userCache.toLoad[uid];
-	            return callback(undefined, _userCache.user[uid]);
-	        }
+	          otherArgs[start] = transform(array);
+	          return apply(func, this, otherArgs);
+	        };
+	      }
+	      /**
+	       * Gets the parent value at `path` of `object`.
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @param {Array} path The path to get the parent value of.
+	       * @returns {*} Returns the parent value.
+	       */
 
-	        oauth.xhr(
-	            { method: 'GET', path: '/api/0.6/user/' + uid },
-	            wrapcb(this, done, _connectionID)
-	        );
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
+	      function parent(object, path) {
+	        return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));
+	      }
+	      /**
+	       * Reorder `array` according to the specified indexes where the element at
+	       * the first index is assigned as the first element, the element at
+	       * the second index is assigned as the second element, and so on.
+	       *
+	       * @private
+	       * @param {Array} array The array to reorder.
+	       * @param {Array} indexes The arranged array indexes.
+	       * @returns {Array} Returns `array`.
+	       */
 
-	            var options = { skipSeen: true };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results[0]);
-	                }
-	            }, options);
-	        }
-	    },
 
+	      function reorder(array, indexes) {
+	        var arrLength = array.length,
+	            length = nativeMin(indexes.length, arrLength),
+	            oldArray = copyArray(array);
 
-	    // Load the details of the logged-in user
-	    // GET /api/0.6/user/details
-	    userDetails: function(callback) {
-	        if (_userDetails) {    // retrieve cached
-	            return callback(undefined, _userDetails);
+	        while (length--) {
+	          var index = indexes[length];
+	          array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined$1;
 	        }
 
-	        oauth.xhr(
-	            { method: 'GET', path: '/api/0.6/user/details' },
-	            wrapcb(this, done, _connectionID)
-	        );
+	        return array;
+	      }
+	      /**
+	       * Gets the value at `key`, unless `key` is "__proto__" or "constructor".
+	       *
+	       * @private
+	       * @param {Object} object The object to query.
+	       * @param {string} key The key of the property to get.
+	       * @returns {*} Returns the property value.
+	       */
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
 
-	            var options = { skipSeen: false };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    _userDetails = results[0];
-	                    return callback(undefined, _userDetails);
-	                }
-	            }, options);
+	      function safeGet(object, key) {
+	        if (key === 'constructor' && typeof object[key] === 'function') {
+	          return;
 	        }
-	    },
 
-
-	    // Load previous changesets for the logged in user
-	    // GET /api/0.6/changesets?user=#id
-	    userChangesets: function(callback) {
-	        if (_userChangesets) {    // retrieve cached
-	            return callback(undefined, _userChangesets);
+	        if (key == '__proto__') {
+	          return;
 	        }
 
-	        this.userDetails(
-	            wrapcb(this, gotDetails, _connectionID)
-	        );
+	        return object[key];
+	      }
+	      /**
+	       * Sets metadata for `func`.
+	       *
+	       * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
+	       * period of time, it will trip its breaker and transition to an identity
+	       * function to avoid garbage collection pauses in V8. See
+	       * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
+	       * for more details.
+	       *
+	       * @private
+	       * @param {Function} func The function to associate metadata with.
+	       * @param {*} data The metadata.
+	       * @returns {Function} Returns `func`.
+	       */
 
 
-	        function gotDetails(err, user) {
-	            if (err) { return callback(err); }
+	      var setData = shortOut(baseSetData);
+	      /**
+	       * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).
+	       *
+	       * @private
+	       * @param {Function} func The function to delay.
+	       * @param {number} wait The number of milliseconds to delay invocation.
+	       * @returns {number|Object} Returns the timer id or timeout object.
+	       */
 
-	            oauth.xhr(
-	                { method: 'GET', path: '/api/0.6/changesets?user=' + user.id },
-	                wrapcb(this, done, _connectionID)
-	            );
-	        }
+	      var setTimeout = ctxSetTimeout || function (func, wait) {
+	        return root.setTimeout(func, wait);
+	      };
+	      /**
+	       * Sets the `toString` method of `func` to return `string`.
+	       *
+	       * @private
+	       * @param {Function} func The function to modify.
+	       * @param {Function} string The `toString` result.
+	       * @returns {Function} Returns `func`.
+	       */
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
 
-	            _userChangesets = Array.prototype.map.call(
-	                xml.getElementsByTagName('changeset'),
-	                function (changeset) { return { tags: getTags(changeset) }; }
-	            ).filter(function (changeset) {
-	                var comment = changeset.tags.comment;
-	                return comment && comment !== '';
-	            });
+	      var setToString = shortOut(baseSetToString);
+	      /**
+	       * Sets the `toString` method of `wrapper` to mimic the source of `reference`
+	       * with wrapper details in a comment at the top of the source body.
+	       *
+	       * @private
+	       * @param {Function} wrapper The function to modify.
+	       * @param {Function} reference The reference function.
+	       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+	       * @returns {Function} Returns `wrapper`.
+	       */
 
-	            return callback(undefined, _userChangesets);
-	        }
-	    },
+	      function setWrapToString(wrapper, reference, bitmask) {
+	        var source = reference + '';
+	        return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));
+	      }
+	      /**
+	       * Creates a function that'll short out and invoke `identity` instead
+	       * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
+	       * milliseconds.
+	       *
+	       * @private
+	       * @param {Function} func The function to restrict.
+	       * @returns {Function} Returns the new shortable function.
+	       */
 
 
-	    // Fetch the status of the OSM API
-	    // GET /api/capabilities
-	    status: function(callback) {
-	        var url = urlroot + '/api/capabilities';
-	        var errback = wrapcb(this, done, _connectionID);
-	        d3_xml(url)
-	            .then(function(data) { errback(null, data); })
-	            .catch(function(err) { errback(err.message); });
+	      function shortOut(func) {
+	        var count = 0,
+	            lastCalled = 0;
+	        return function () {
+	          var stamp = nativeNow(),
+	              remaining = HOT_SPAN - (stamp - lastCalled);
+	          lastCalled = stamp;
 
-	        function done(err, xml) {
-	            if (err) {
-	                // the status is null if no response could be retrieved
-	                return callback(err, null);
+	          if (remaining > 0) {
+	            if (++count >= HOT_COUNT) {
+	              return arguments[0];
 	            }
+	          } else {
+	            count = 0;
+	          }
 
-	            // update blacklists
-	            var elements = xml.getElementsByTagName('blacklist');
-	            var regexes = [];
-	            for (var i = 0; i < elements.length; i++) {
-	                var regex = elements[i].getAttribute('regex');  // needs unencode?
-	                if (regex) {
-	                    regexes.push(regex);
-	                }
-	            }
-	            if (regexes.length) {
-	                _blacklists = regexes;
-	            }
+	          return func.apply(undefined$1, arguments);
+	        };
+	      }
+	      /**
+	       * A specialized version of `_.shuffle` which mutates and sets the size of `array`.
+	       *
+	       * @private
+	       * @param {Array} array The array to shuffle.
+	       * @param {number} [size=array.length] The size of `array`.
+	       * @returns {Array} Returns `array`.
+	       */
 
-	            if (_rateLimitError) {
-	                return callback(_rateLimitError, 'rateLimited');
-	            } else {
-	                var waynodes = xml.getElementsByTagName('waynodes');
-	                var maxWayNodes = waynodes.length && parseInt(waynodes[0].getAttribute('maximum'), 10);
-	                if (maxWayNodes && isFinite(maxWayNodes)) { _maxWayNodes = maxWayNodes; }
 
-	                var apiStatus = xml.getElementsByTagName('status');
-	                var val = apiStatus[0].getAttribute('api');
-	                return callback(undefined, val);
-	            }
-	        }
-	    },
+	      function shuffleSelf(array, size) {
+	        var index = -1,
+	            length = array.length,
+	            lastIndex = length - 1;
+	        size = size === undefined$1 ? length : size;
 
-	    // Calls `status` and dispatches an `apiStatusChange` event if the returned
-	    // status differs from the cached status.
-	    reloadApiStatus: function() {
-	        // throttle to avoid unncessary API calls
-	        if (!this.throttledReloadApiStatus) {
-	            var that = this;
-	            this.throttledReloadApiStatus = throttle(function() {
-	                that.status(function(err, status) {
-	                    if (status !== _cachedApiStatus) {
-	                        _cachedApiStatus = status;
-	                        dispatch$6.call('apiStatusChange', that, err, status);
-	                    }
-	                });
-	            }, 500);
+	        while (++index < size) {
+	          var rand = baseRandom(index, lastIndex),
+	              value = array[rand];
+	          array[rand] = array[index];
+	          array[index] = value;
 	        }
-	        this.throttledReloadApiStatus();
-	    },
 
+	        array.length = size;
+	        return array;
+	      }
+	      /**
+	       * Converts `string` to a property path array.
+	       *
+	       * @private
+	       * @param {string} string The string to convert.
+	       * @returns {Array} Returns the property path array.
+	       */
 
-	    // Returns the maximum number of nodes a single way can have
-	    maxWayNodes: function() {
-	        return _maxWayNodes;
-	    },
 
+	      var stringToPath = memoizeCapped(function (string) {
+	        var result = [];
 
-	    // Load data (entities) from the API in tiles
-	    // GET /api/0.6/map?bbox=
-	    loadTiles: function(projection, callback) {
-	        if (_off) { return; }
+	        if (string.charCodeAt(0) === 46
+	        /* . */
+	        ) {
+	          result.push('');
+	        }
 
-	        // determine the needed tiles to cover the view
-	        var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection);
+	        string.replace(rePropName, function (match, number, quote, subString) {
+	          result.push(quote ? subString.replace(reEscapeChar, '$1') : number || match);
+	        });
+	        return result;
+	      });
+	      /**
+	       * Converts `value` to a string key if it's not a string or symbol.
+	       *
+	       * @private
+	       * @param {*} value The value to inspect.
+	       * @returns {string|symbol} Returns the key.
+	       */
 
-	        // abort inflight requests that are no longer needed
-	        var hadRequests = hasInflightRequests(_tileCache);
-	        abortUnwantedRequests$3(_tileCache, tiles);
-	        if (hadRequests && !hasInflightRequests(_tileCache)) {
-	            dispatch$6.call('loaded');    // stop the spinner
+	      function toKey(value) {
+	        if (typeof value == 'string' || isSymbol(value)) {
+	          return value;
 	        }
 
-	        // issue new requests..
-	        tiles.forEach(function(tile) {
-	            this.loadTile(tile, callback);
-	        }, this);
-	    },
+	        var result = value + '';
+	        return result == '0' && 1 / value == -INFINITY ? '-0' : result;
+	      }
+	      /**
+	       * Converts `func` to its source code.
+	       *
+	       * @private
+	       * @param {Function} func The function to convert.
+	       * @returns {string} Returns the source code.
+	       */
 
 
-	    // Load a single data tile
-	    // GET /api/0.6/map?bbox=
-	    loadTile: function(tile, callback) {
-	        if (_off) { return; }
-	        if (_tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) { return; }
+	      function toSource(func) {
+	        if (func != null) {
+	          try {
+	            return funcToString.call(func);
+	          } catch (e) {}
 
-	        if (!hasInflightRequests(_tileCache)) {
-	            dispatch$6.call('loading');   // start the spinner
+	          try {
+	            return func + '';
+	          } catch (e) {}
 	        }
 
-	        var path = '/api/0.6/map.json?bbox=';
-	        var options = { skipSeen: true };
-
-	        _tileCache.inflight[tile.id] = this.loadFromAPI(
-	            path + tile.extent.toParam(),
-	            tileCallback,
-	            options
-	        );
+	        return '';
+	      }
+	      /**
+	       * Updates wrapper `details` based on `bitmask` flags.
+	       *
+	       * @private
+	       * @returns {Array} details The details to modify.
+	       * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+	       * @returns {Array} Returns `details`.
+	       */
 
-	        function tileCallback(err, parsed) {
-	            delete _tileCache.inflight[tile.id];
-	            if (!err) {
-	                delete _tileCache.toLoad[tile.id];
-	                _tileCache.loaded[tile.id] = true;
-	                var bbox = tile.extent.bbox();
-	                bbox.id = tile.id;
-	                _tileCache.rtree.insert(bbox);
-	            }
-	            if (callback) {
-	                callback(err, Object.assign({ data: parsed }, tile));
-	            }
-	            if (!hasInflightRequests(_tileCache)) {
-	                dispatch$6.call('loaded');     // stop the spinner
-	            }
-	        }
-	    },
 
+	      function updateWrapDetails(details, bitmask) {
+	        arrayEach(wrapFlags, function (pair) {
+	          var value = '_.' + pair[0];
 
-	    isDataLoaded: function(loc) {
-	        var bbox = { minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1] };
-	        return _tileCache.rtree.collides(bbox);
-	    },
+	          if (bitmask & pair[1] && !arrayIncludes(details, value)) {
+	            details.push(value);
+	          }
+	        });
+	        return details.sort();
+	      }
+	      /**
+	       * Creates a clone of `wrapper`.
+	       *
+	       * @private
+	       * @param {Object} wrapper The wrapper to clone.
+	       * @returns {Object} Returns the cloned wrapper.
+	       */
 
 
-	    // load the tile that covers the given `loc`
-	    loadTileAtLoc: function(loc, callback) {
-	        // Back off if the toLoad queue is filling up.. re #6417
-	        // (Currently `loadTileAtLoc` requests are considered low priority - used by operations to
-	        // let users safely edit geometries which extend to unloaded tiles.  We can drop some.)
-	        if (Object.keys(_tileCache.toLoad).length > 50) { return; }
+	      function wrapperClone(wrapper) {
+	        if (wrapper instanceof LazyWrapper) {
+	          return wrapper.clone();
+	        }
 
-	        var k = geoZoomToScale(_tileZoom$3 + 1);
-	        var offset = geoRawMercator().scale(k)(loc);
-	        var projection = geoRawMercator().transform({ k: k, x: -offset[0], y: -offset[1] });
-	        var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection);
+	        var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
+	        result.__actions__ = copyArray(wrapper.__actions__);
+	        result.__index__ = wrapper.__index__;
+	        result.__values__ = wrapper.__values__;
+	        return result;
+	      }
+	      /*------------------------------------------------------------------------*/
 
-	        tiles.forEach(function(tile) {
-	            if (_tileCache.toLoad[tile.id] || _tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) { return; }
+	      /**
+	       * Creates an array of elements split into groups the length of `size`.
+	       * If `array` can't be split evenly, the final chunk will be the remaining
+	       * elements.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to process.
+	       * @param {number} [size=1] The length of each chunk
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Array} Returns the new array of chunks.
+	       * @example
+	       *
+	       * _.chunk(['a', 'b', 'c', 'd'], 2);
+	       * // => [['a', 'b'], ['c', 'd']]
+	       *
+	       * _.chunk(['a', 'b', 'c', 'd'], 3);
+	       * // => [['a', 'b', 'c'], ['d']]
+	       */
 
-	            _tileCache.toLoad[tile.id] = true;
-	            this.loadTile(tile, callback);
-	        }, this);
-	    },
 
+	      function chunk(array, size, guard) {
+	        if (guard ? isIterateeCall(array, size, guard) : size === undefined$1) {
+	          size = 1;
+	        } else {
+	          size = nativeMax(toInteger(size), 0);
+	        }
 
-	    // Load notes from the API in tiles
-	    // GET /api/0.6/notes?bbox=
-	    loadNotes: function(projection, noteOptions) {
-	        noteOptions = Object.assign({ limit: 10000, closed: 7 }, noteOptions);
-	        if (_off) { return; }
+	        var length = array == null ? 0 : array.length;
 
-	        var that = this;
-	        var path = '/api/0.6/notes?limit=' + noteOptions.limit + '&closed=' + noteOptions.closed + '&bbox=';
-	        var throttleLoadUsers = throttle(function() {
-	            var uids = Object.keys(_userCache.toLoad);
-	            if (!uids.length) { return; }
-	            that.loadUsers(uids, function() {});  // eagerly load user details
-	        }, 750);
-
-	        // determine the needed tiles to cover the view
-	        var tiles = tiler$5.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection);
-
-	        // abort inflight requests that are no longer needed
-	        abortUnwantedRequests$3(_noteCache, tiles);
-
-	        // issue new requests..
-	        tiles.forEach(function(tile) {
-	            if (_noteCache.loaded[tile.id] || _noteCache.inflight[tile.id]) { return; }
-
-	            var options = { skipSeen: false };
-	            _noteCache.inflight[tile.id] = that.loadFromAPI(
-	                path + tile.extent.toParam(),
-	                function(err) {
-	                    delete _noteCache.inflight[tile.id];
-	                    if (!err) {
-	                        _noteCache.loaded[tile.id] = true;
-	                    }
-	                    throttleLoadUsers();
-	                    dispatch$6.call('loadedNotes');
-	                },
-	                options
-	            );
-	        });
-	    },
+	        if (!length || size < 1) {
+	          return [];
+	        }
 
+	        var index = 0,
+	            resIndex = 0,
+	            result = Array(nativeCeil(length / size));
 
-	    // Create a note
-	    // POST /api/0.6/notes?params
-	    postNoteCreate: function(note, callback) {
-	        if (!this.authenticated()) {
-	            return callback({ message: 'Not Authenticated', status: -3 }, note);
+	        while (index < length) {
+	          result[resIndex++] = baseSlice(array, index, index += size);
 	        }
-	        if (_noteCache.inflightPost[note.id]) {
-	            return callback({ message: 'Note update already inflight', status: -2 }, note);
-	        }
-
-	        if (!note.loc[0] || !note.loc[1] || !note.newComment) { return; } // location & description required
 
-	        var comment = note.newComment;
-	        if (note.newCategory && note.newCategory !== 'None') { comment += ' #' + note.newCategory; }
+	        return result;
+	      }
+	      /**
+	       * Creates an array with all falsey values removed. The values `false`, `null`,
+	       * `0`, `""`, `undefined`, and `NaN` are falsey.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to compact.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @example
+	       *
+	       * _.compact([0, 1, false, 2, '', 3]);
+	       * // => [1, 2, 3]
+	       */
 
-	        var path = '/api/0.6/notes?' + utilQsString({ lon: note.loc[0], lat: note.loc[1], text: comment });
 
-	        _noteCache.inflightPost[note.id] = oauth.xhr(
-	            { method: 'POST', path: path },
-	            wrapcb(this, done, _connectionID)
-	        );
+	      function compact(array) {
+	        var index = -1,
+	            length = array == null ? 0 : array.length,
+	            resIndex = 0,
+	            result = [];
 
+	        while (++index < length) {
+	          var value = array[index];
 
-	        function done(err, xml) {
-	            delete _noteCache.inflightPost[note.id];
-	            if (err) { return callback(err); }
+	          if (value) {
+	            result[resIndex++] = value;
+	          }
+	        }
 
-	            // we get the updated note back, remove from caches and reparse..
-	            this.removeNote(note);
+	        return result;
+	      }
+	      /**
+	       * Creates a new array concatenating `array` with any additional arrays
+	       * and/or values.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to concatenate.
+	       * @param {...*} [values] The values to concatenate.
+	       * @returns {Array} Returns the new concatenated array.
+	       * @example
+	       *
+	       * var array = [1];
+	       * var other = _.concat(array, 2, [3], [[4]]);
+	       *
+	       * console.log(other);
+	       * // => [1, 2, 3, [4]]
+	       *
+	       * console.log(array);
+	       * // => [1]
+	       */
 
-	            var options = { skipSeen: false };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results[0]);
-	                }
-	            }, options);
-	        }
-	    },
 
+	      function concat() {
+	        var length = arguments.length;
 
-	    // Update a note
-	    // POST /api/0.6/notes/#id/comment?text=comment
-	    // POST /api/0.6/notes/#id/close?text=comment
-	    // POST /api/0.6/notes/#id/reopen?text=comment
-	    postNoteUpdate: function(note, newStatus, callback) {
-	        if (!this.authenticated()) {
-	            return callback({ message: 'Not Authenticated', status: -3 }, note);
-	        }
-	        if (_noteCache.inflightPost[note.id]) {
-	            return callback({ message: 'Note update already inflight', status: -2 }, note);
+	        if (!length) {
+	          return [];
 	        }
 
-	        var action;
-	        if (note.status !== 'closed' && newStatus === 'closed') {
-	            action = 'close';
-	        } else if (note.status !== 'open' && newStatus === 'open') {
-	            action = 'reopen';
-	        } else {
-	            action = 'comment';
-	            if (!note.newComment) { return; } // when commenting, comment required
-	        }
+	        var args = Array(length - 1),
+	            array = arguments[0],
+	            index = length;
 
-	        var path = '/api/0.6/notes/' + note.id + '/' + action;
-	        if (note.newComment) {
-	            path += '?' + utilQsString({ text: note.newComment });
+	        while (index--) {
+	          args[index - 1] = arguments[index];
 	        }
 
-	        _noteCache.inflightPost[note.id] = oauth.xhr(
-	            { method: 'POST', path: path },
-	            wrapcb(this, done, _connectionID)
-	        );
-
+	        return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
+	      }
+	      /**
+	       * Creates an array of `array` values not included in the other given arrays
+	       * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons. The order and references of result values are
+	       * determined by the first array.
+	       *
+	       * **Note:** Unlike `_.pullAll`, this method returns a new array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {...Array} [values] The values to exclude.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @see _.without, _.xor
+	       * @example
+	       *
+	       * _.difference([2, 1], [2, 3]);
+	       * // => [1]
+	       */
 
-	        function done(err, xml) {
-	            delete _noteCache.inflightPost[note.id];
-	            if (err) { return callback(err); }
 
-	            // we get the updated note back, remove from caches and reparse..
-	            this.removeNote(note);
+	      var difference = baseRest(function (array, values) {
+	        return isArrayLikeObject(array) ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true)) : [];
+	      });
+	      /**
+	       * This method is like `_.difference` except that it accepts `iteratee` which
+	       * is invoked for each element of `array` and `values` to generate the criterion
+	       * by which they're compared. The order and references of result values are
+	       * determined by the first array. The iteratee is invoked with one argument:
+	       * (value).
+	       *
+	       * **Note:** Unlike `_.pullAllBy`, this method returns a new array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {...Array} [values] The values to exclude.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @example
+	       *
+	       * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+	       * // => [1.2]
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
+	       * // => [{ 'x': 2 }]
+	       */
 
-	            // update closed note cache - used to populate `closed:note` changeset tag
-	            if (action === 'close') {
-	                _noteCache.closed[note.id] = true;
-	            } else if (action === 'reopen') {
-	                delete _noteCache.closed[note.id];
-	            }
+	      var differenceBy = baseRest(function (array, values) {
+	        var iteratee = last(values);
 
-	            var options = { skipSeen: false };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results[0]);
-	                }
-	            }, options);
+	        if (isArrayLikeObject(iteratee)) {
+	          iteratee = undefined$1;
 	        }
-	    },
-
-
-	    switch: function(options) {
-	        urlroot = options.urlroot;
-
-	        oauth.options(Object.assign({
-	            url: urlroot,
-	            loading: authLoading,
-	            done: authDone
-	        }, options));
-
-	        this.reset();
-	        this.userChangesets(function() {});  // eagerly load user details/changesets
-	        dispatch$6.call('change');
-	        return this;
-	    },
 
+	        return isArrayLikeObject(array) ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2)) : [];
+	      });
+	      /**
+	       * This method is like `_.difference` except that it accepts `comparator`
+	       * which is invoked to compare elements of `array` to `values`. The order and
+	       * references of result values are determined by the first array. The comparator
+	       * is invoked with two arguments: (arrVal, othVal).
+	       *
+	       * **Note:** Unlike `_.pullAllWith`, this method returns a new array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {...Array} [values] The values to exclude.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @example
+	       *
+	       * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+	       *
+	       * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
+	       * // => [{ 'x': 2, 'y': 1 }]
+	       */
 
-	    toggle: function(val) {
-	        _off = !val;
-	        return this;
-	    },
+	      var differenceWith = baseRest(function (array, values) {
+	        var comparator = last(values);
 
+	        if (isArrayLikeObject(comparator)) {
+	          comparator = undefined$1;
+	        }
 
-	    isChangesetInflight: function() {
-	        return !!_changeset.inflight;
-	    },
+	        return isArrayLikeObject(array) ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined$1, comparator) : [];
+	      });
+	      /**
+	       * Creates a slice of `array` with `n` elements dropped from the beginning.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.5.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {number} [n=1] The number of elements to drop.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * _.drop([1, 2, 3]);
+	       * // => [2, 3]
+	       *
+	       * _.drop([1, 2, 3], 2);
+	       * // => [3]
+	       *
+	       * _.drop([1, 2, 3], 5);
+	       * // => []
+	       *
+	       * _.drop([1, 2, 3], 0);
+	       * // => [1, 2, 3]
+	       */
 
+	      function drop(array, n, guard) {
+	        var length = array == null ? 0 : array.length;
 
-	    // get/set cached data
-	    // This is used to save/restore the state when entering/exiting the walkthrough
-	    // Also used for testing purposes.
-	    caches: function(obj) {
-	        function cloneCache(source) {
-	            var target = {};
-	            Object.keys(source).forEach(function(k) {
-	                if (k === 'rtree') {
-	                    target.rtree = new RBush().fromJSON(source.rtree.toJSON());  // clone rbush
-	                } else if (k === 'note') {
-	                    target.note = {};
-	                    Object.keys(source.note).forEach(function(id) {
-	                        target.note[id] = osmNote(source.note[id]);   // copy notes
-	                    });
-	                } else {
-	                    target[k] = JSON.parse(JSON.stringify(source[k]));   // clone deep
-	                }
-	            });
-	            return target;
+	        if (!length) {
+	          return [];
 	        }
 
-	        if (!arguments.length) {
-	            return {
-	                tile: cloneCache(_tileCache),
-	                note: cloneCache(_noteCache),
-	                user: cloneCache(_userCache)
-	            };
-	        }
+	        n = guard || n === undefined$1 ? 1 : toInteger(n);
+	        return baseSlice(array, n < 0 ? 0 : n, length);
+	      }
+	      /**
+	       * Creates a slice of `array` with `n` elements dropped from the end.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {number} [n=1] The number of elements to drop.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * _.dropRight([1, 2, 3]);
+	       * // => [1, 2]
+	       *
+	       * _.dropRight([1, 2, 3], 2);
+	       * // => [1]
+	       *
+	       * _.dropRight([1, 2, 3], 5);
+	       * // => []
+	       *
+	       * _.dropRight([1, 2, 3], 0);
+	       * // => [1, 2, 3]
+	       */
 
-	        // access caches directly for testing (e.g., loading notes rtree)
-	        if (obj === 'get') {
-	            return {
-	                tile: _tileCache,
-	                note: _noteCache,
-	                user: _userCache
-	            };
-	        }
 
-	        if (obj.tile) {
-	            _tileCache = obj.tile;
-	            _tileCache.inflight = {};
-	        }
-	        if (obj.note) {
-	            _noteCache = obj.note;
-	            _noteCache.inflight = {};
-	            _noteCache.inflightPost = {};
-	        }
-	        if (obj.user) {
-	            _userCache = obj.user;
+	      function dropRight(array, n, guard) {
+	        var length = array == null ? 0 : array.length;
+
+	        if (!length) {
+	          return [];
 	        }
 
-	        return this;
-	    },
+	        n = guard || n === undefined$1 ? 1 : toInteger(n);
+	        n = length - n;
+	        return baseSlice(array, 0, n < 0 ? 0 : n);
+	      }
+	      /**
+	       * Creates a slice of `array` excluding elements dropped from the end.
+	       * Elements are dropped until `predicate` returns falsey. The predicate is
+	       * invoked with three arguments: (value, index, array).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'active': true },
+	       *   { 'user': 'fred',    'active': false },
+	       *   { 'user': 'pebbles', 'active': false }
+	       * ];
+	       *
+	       * _.dropRightWhile(users, function(o) { return !o.active; });
+	       * // => objects for ['barney']
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
+	       * // => objects for ['barney', 'fred']
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.dropRightWhile(users, ['active', false]);
+	       * // => objects for ['barney']
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.dropRightWhile(users, 'active');
+	       * // => objects for ['barney', 'fred', 'pebbles']
+	       */
 
 
-	    logout: function() {
-	        _userChangesets = undefined;
-	        _userDetails = undefined;
-	        oauth.logout();
-	        dispatch$6.call('change');
-	        return this;
-	    },
+	      function dropRightWhile(array, predicate) {
+	        return array && array.length ? baseWhile(array, getIteratee(predicate, 3), true, true) : [];
+	      }
+	      /**
+	       * Creates a slice of `array` excluding elements dropped from the beginning.
+	       * Elements are dropped until `predicate` returns falsey. The predicate is
+	       * invoked with three arguments: (value, index, array).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'active': false },
+	       *   { 'user': 'fred',    'active': false },
+	       *   { 'user': 'pebbles', 'active': true }
+	       * ];
+	       *
+	       * _.dropWhile(users, function(o) { return !o.active; });
+	       * // => objects for ['pebbles']
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.dropWhile(users, { 'user': 'barney', 'active': false });
+	       * // => objects for ['fred', 'pebbles']
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.dropWhile(users, ['active', false]);
+	       * // => objects for ['pebbles']
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.dropWhile(users, 'active');
+	       * // => objects for ['barney', 'fred', 'pebbles']
+	       */
 
 
-	    authenticated: function() {
-	        return oauth.authenticated();
-	    },
+	      function dropWhile(array, predicate) {
+	        return array && array.length ? baseWhile(array, getIteratee(predicate, 3), true) : [];
+	      }
+	      /**
+	       * Fills elements of `array` with `value` from `start` up to, but not
+	       * including, `end`.
+	       *
+	       * **Note:** This method mutates `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.2.0
+	       * @category Array
+	       * @param {Array} array The array to fill.
+	       * @param {*} value The value to fill `array` with.
+	       * @param {number} [start=0] The start position.
+	       * @param {number} [end=array.length] The end position.
+	       * @returns {Array} Returns `array`.
+	       * @example
+	       *
+	       * var array = [1, 2, 3];
+	       *
+	       * _.fill(array, 'a');
+	       * console.log(array);
+	       * // => ['a', 'a', 'a']
+	       *
+	       * _.fill(Array(3), 2);
+	       * // => [2, 2, 2]
+	       *
+	       * _.fill([4, 6, 8, 10], '*', 1, 3);
+	       * // => [4, '*', '*', 10]
+	       */
 
 
-	    authenticate: function(callback) {
-	        var that = this;
-	        var cid = _connectionID;
-	        _userChangesets = undefined;
-	        _userDetails = undefined;
+	      function fill(array, value, start, end) {
+	        var length = array == null ? 0 : array.length;
 
-	        function done(err, res) {
-	            if (err) {
-	                if (callback) { callback(err); }
-	                return;
-	            }
-	            if (that.getConnectionId() !== cid) {
-	                if (callback) { callback({ message: 'Connection Switched', status: -1 }); }
-	                return;
-	            }
-	            _rateLimitError = undefined;
-	            dispatch$6.call('change');
-	            if (callback) { callback(err, res); }
-	            that.userChangesets(function() {});  // eagerly load user details/changesets
+	        if (!length) {
+	          return [];
 	        }
 
-	        return oauth.authenticate(done);
-	    },
-
+	        if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
+	          start = 0;
+	          end = length;
+	        }
 
-	    imageryBlacklists: function() {
-	        return _blacklists;
-	    },
+	        return baseFill(array, value, start, end);
+	      }
+	      /**
+	       * This method is like `_.find` except that it returns the index of the first
+	       * element `predicate` returns truthy for instead of the element itself.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.1.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @param {number} [fromIndex=0] The index to search from.
+	       * @returns {number} Returns the index of the found element, else `-1`.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'active': false },
+	       *   { 'user': 'fred',    'active': false },
+	       *   { 'user': 'pebbles', 'active': true }
+	       * ];
+	       *
+	       * _.findIndex(users, function(o) { return o.user == 'barney'; });
+	       * // => 0
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.findIndex(users, { 'user': 'fred', 'active': false });
+	       * // => 1
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.findIndex(users, ['active', false]);
+	       * // => 0
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.findIndex(users, 'active');
+	       * // => 2
+	       */
 
 
-	    tileZoom: function(val) {
-	        if (!arguments.length) { return _tileZoom$3; }
-	        _tileZoom$3 = val;
-	        return this;
-	    },
+	      function findIndex(array, predicate, fromIndex) {
+	        var length = array == null ? 0 : array.length;
 
+	        if (!length) {
+	          return -1;
+	        }
 
-	    // get all cached notes covering the viewport
-	    notes: function(projection) {
-	        var viewport = projection.clipExtent();
-	        var min = [viewport[0][0], viewport[1][1]];
-	        var max = [viewport[1][0], viewport[0][1]];
-	        var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	        var index = fromIndex == null ? 0 : toInteger(fromIndex);
 
-	        return _noteCache.rtree.search(bbox)
-	            .map(function(d) { return d.data; });
-	    },
+	        if (index < 0) {
+	          index = nativeMax(length + index, 0);
+	        }
 
+	        return baseFindIndex(array, getIteratee(predicate, 3), index);
+	      }
+	      /**
+	       * This method is like `_.findIndex` except that it iterates over elements
+	       * of `collection` from right to left.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @param {number} [fromIndex=array.length-1] The index to search from.
+	       * @returns {number} Returns the index of the found element, else `-1`.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'active': true },
+	       *   { 'user': 'fred',    'active': false },
+	       *   { 'user': 'pebbles', 'active': false }
+	       * ];
+	       *
+	       * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
+	       * // => 2
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.findLastIndex(users, { 'user': 'barney', 'active': true });
+	       * // => 0
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.findLastIndex(users, ['active', false]);
+	       * // => 2
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.findLastIndex(users, 'active');
+	       * // => 0
+	       */
 
-	    // get a single note from the cache
-	    getNote: function(id) {
-	        return _noteCache.note[id];
-	    },
 
+	      function findLastIndex(array, predicate, fromIndex) {
+	        var length = array == null ? 0 : array.length;
 
-	    // remove a single note from the cache
-	    removeNote: function(note) {
-	        if (!(note instanceof osmNote) || !note.id) { return; }
+	        if (!length) {
+	          return -1;
+	        }
 
-	        delete _noteCache.note[note.id];
-	        updateRtree$3(encodeNoteRtree(note), false);  // false = remove
-	    },
+	        var index = length - 1;
 
+	        if (fromIndex !== undefined$1) {
+	          index = toInteger(fromIndex);
+	          index = fromIndex < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
+	        }
 
-	    // replace a single note in the cache
-	    replaceNote: function(note) {
-	        if (!(note instanceof osmNote) || !note.id) { return; }
+	        return baseFindIndex(array, getIteratee(predicate, 3), index, true);
+	      }
+	      /**
+	       * Flattens `array` a single level deep.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to flatten.
+	       * @returns {Array} Returns the new flattened array.
+	       * @example
+	       *
+	       * _.flatten([1, [2, [3, [4]], 5]]);
+	       * // => [1, 2, [3, [4]], 5]
+	       */
 
-	        _noteCache.note[note.id] = note;
-	        updateRtree$3(encodeNoteRtree(note), true);  // true = replace
-	        return note;
-	    },
 
+	      function flatten(array) {
+	        var length = array == null ? 0 : array.length;
+	        return length ? baseFlatten(array, 1) : [];
+	      }
+	      /**
+	       * Recursively flattens `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to flatten.
+	       * @returns {Array} Returns the new flattened array.
+	       * @example
+	       *
+	       * _.flattenDeep([1, [2, [3, [4]], 5]]);
+	       * // => [1, 2, 3, 4, 5]
+	       */
 
-	    // Get an array of note IDs closed during this session.
-	    // Used to populate `closed:note` changeset tag
-	    getClosedIDs: function() {
-	        return Object.keys(_noteCache.closed).sort();
-	    }
 
-	};
+	      function flattenDeep(array) {
+	        var length = array == null ? 0 : array.length;
+	        return length ? baseFlatten(array, INFINITY) : [];
+	      }
+	      /**
+	       * Recursively flatten `array` up to `depth` times.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.4.0
+	       * @category Array
+	       * @param {Array} array The array to flatten.
+	       * @param {number} [depth=1] The maximum recursion depth.
+	       * @returns {Array} Returns the new flattened array.
+	       * @example
+	       *
+	       * var array = [1, [2, [3, [4]], 5]];
+	       *
+	       * _.flattenDepth(array, 1);
+	       * // => [1, 2, [3, [4]], 5]
+	       *
+	       * _.flattenDepth(array, 2);
+	       * // => [1, 2, 3, [4], 5]
+	       */
 
-	var apibase$3 = 'https://wiki.openstreetmap.org/w/api.php';
-	var _inflight$1 = {};
-	var _wikibaseCache = {};
-	var _localeIDs = { en: false };
 
+	      function flattenDepth(array, depth) {
+	        var length = array == null ? 0 : array.length;
 
-	var debouncedRequest = debounce(request, 500, { leading: false });
+	        if (!length) {
+	          return [];
+	        }
 
-	function request(url, callback) {
-	    if (_inflight$1[url]) { return; }
-	    var controller = new AbortController();
-	    _inflight$1[url] = controller;
+	        depth = depth === undefined$1 ? 1 : toInteger(depth);
+	        return baseFlatten(array, depth);
+	      }
+	      /**
+	       * The inverse of `_.toPairs`; this method returns an object composed
+	       * from key-value `pairs`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} pairs The key-value pairs.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * _.fromPairs([['a', 1], ['b', 2]]);
+	       * // => { 'a': 1, 'b': 2 }
+	       */
 
-	    d3_json(url, { signal: controller.signal })
-	        .then(function(result) {
-	            delete _inflight$1[url];
-	            if (callback) { callback(null, result); }
-	        })
-	        .catch(function(err) {
-	            delete _inflight$1[url];
-	            if (err.name === 'AbortError') { return; }
-	            if (callback) { callback(err.message); }
-	        });
-	}
 
+	      function fromPairs(pairs) {
+	        var index = -1,
+	            length = pairs == null ? 0 : pairs.length,
+	            result = {};
 
-	/**
-	 * Get the best string value from the descriptions/labels result
-	 * Note that if mediawiki doesn't recognize language code, it will return all values.
-	 * In that case, fallback to use English.
-	 * @param values object - either descriptions or labels
-	 * @param langCode String
-	 * @returns localized string
-	 */
-	function localizedToString(values, langCode) {
-	    if (values) {
-	        values = values[langCode] || values.en;
-	    }
-	    return values ? values.value : '';
-	}
+	        while (++index < length) {
+	          var pair = pairs[index];
+	          result[pair[0]] = pair[1];
+	        }
 
+	        return result;
+	      }
+	      /**
+	       * Gets the first element of `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @alias first
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @returns {*} Returns the first element of `array`.
+	       * @example
+	       *
+	       * _.head([1, 2, 3]);
+	       * // => 1
+	       *
+	       * _.head([]);
+	       * // => undefined
+	       */
 
-	var serviceOsmWikibase = {
 
-	    init: function() {
-	        _inflight$1 = {};
-	        _wikibaseCache = {};
-	        _localeIDs = {};
-	    },
+	      function head(array) {
+	        return array && array.length ? array[0] : undefined$1;
+	      }
+	      /**
+	       * Gets the index at which the first occurrence of `value` is found in `array`
+	       * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons. If `fromIndex` is negative, it's used as the
+	       * offset from the end of `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {*} value The value to search for.
+	       * @param {number} [fromIndex=0] The index to search from.
+	       * @returns {number} Returns the index of the matched value, else `-1`.
+	       * @example
+	       *
+	       * _.indexOf([1, 2, 1, 2], 2);
+	       * // => 1
+	       *
+	       * // Search from the `fromIndex`.
+	       * _.indexOf([1, 2, 1, 2], 2, 2);
+	       * // => 3
+	       */
 
 
-	    reset: function() {
-	        Object.values(_inflight$1).forEach(function(controller) { controller.abort(); });
-	        _inflight$1 = {};
-	    },
+	      function indexOf(array, value, fromIndex) {
+	        var length = array == null ? 0 : array.length;
 
+	        if (!length) {
+	          return -1;
+	        }
 
-	    /**
-	     * Get the best value for the property, or undefined if not found
-	     * @param entity object from wikibase
-	     * @param property string e.g. 'P4' for image
-	     * @param langCode string e.g. 'fr' for French
-	     */
-	    claimToValue: function(entity, property, langCode) {
-	        if (!entity.claims[property]) { return undefined; }
-	        var locale = _localeIDs[langCode];
-	        var preferredPick, localePick;
-
-	        entity.claims[property].forEach(function(stmt) {
-	            // If exists, use value limited to the needed language (has a qualifier P26 = locale)
-	            // Or if not found, use the first value with the "preferred" rank
-	            if (!preferredPick && stmt.rank === 'preferred') {
-	                preferredPick = stmt;
-	            }
-	            if (locale && stmt.qualifiers && stmt.qualifiers.P26 &&
-	                stmt.qualifiers.P26[0].datavalue.value.id === locale
-	            ) {
-	                localePick = stmt;
-	            }
-	        });
+	        var index = fromIndex == null ? 0 : toInteger(fromIndex);
 
-	        var result = localePick || preferredPick;
-	        if (result) {
-	            var datavalue = result.mainsnak.datavalue;
-	            return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
-	        } else {
-	            return undefined;
+	        if (index < 0) {
+	          index = nativeMax(length + index, 0);
 	        }
-	    },
 
+	        return baseIndexOf(array, value, index);
+	      }
+	      /**
+	       * Gets all but the last element of `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * _.initial([1, 2, 3]);
+	       * // => [1, 2]
+	       */
 
-	    /**
-	     * Convert monolingual property into a key-value object (language -> value)
-	     * @param entity object from wikibase
-	     * @param property string e.g. 'P31' for monolingual wiki page title
-	     */
-	    monolingualClaimToValueObj: function(entity, property) {
-	        if (!entity || !entity.claims[property]) { return undefined; }
-
-	        return entity.claims[property].reduce(function(acc, obj) {
-	            var value = obj.mainsnak.datavalue.value;
-	            acc[value.language] = value.text;
-	            return acc;
-	        }, {});
-	    },
 
+	      function initial(array) {
+	        var length = array == null ? 0 : array.length;
+	        return length ? baseSlice(array, 0, -1) : [];
+	      }
+	      /**
+	       * Creates an array of unique values that are included in all given arrays
+	       * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons. The order and references of result values are
+	       * determined by the first array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @returns {Array} Returns the new array of intersecting values.
+	       * @example
+	       *
+	       * _.intersection([2, 1], [2, 3]);
+	       * // => [2]
+	       */
 
-	    toSitelink: function(key, value) {
-	        var result = value ? ('Tag:' + key + '=' + value) : 'Key:' + key;
-	        return result.replace(/_/g, ' ').trim();
-	    },
 
+	      var intersection = baseRest(function (arrays) {
+	        var mapped = arrayMap(arrays, castArrayLikeObject);
+	        return mapped.length && mapped[0] === arrays[0] ? baseIntersection(mapped) : [];
+	      });
+	      /**
+	       * This method is like `_.intersection` except that it accepts `iteratee`
+	       * which is invoked for each element of each `arrays` to generate the criterion
+	       * by which they're compared. The order and references of result values are
+	       * determined by the first array. The iteratee is invoked with one argument:
+	       * (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {Array} Returns the new array of intersecting values.
+	       * @example
+	       *
+	       * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+	       * // => [2.1]
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+	       * // => [{ 'x': 1 }]
+	       */
 
-	    //
-	    // Pass params object of the form:
-	    // {
-	    //   key: 'string',
-	    //   value: 'string',
-	    //   rtype: 'string',
-	    //   langCode: 'string'
-	    // }
-	    //
-	    getEntity: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest : request;
-	        var that = this;
-	        var titles = [];
-	        var result = {};
-	        var rtypeSitelink = params.rtype ? ('Relation:' + params.rtype).replace(/_/g, ' ').trim() : false;
-	        var keySitelink = params.key ? this.toSitelink(params.key) : false;
-	        var tagSitelink = (params.key && params.value) ? this.toSitelink(params.key, params.value) : false;
-	        var localeSitelink;
-
-	        if (params.langCode && _localeIDs[params.langCode] === undefined) {
-	            // If this is the first time we are asking about this locale,
-	            // fetch corresponding entity (if it exists), and cache it.
-	            // If there is no such entry, cache `false` value to avoid re-requesting it.
-	            localeSitelink = ('Locale:' + params.langCode).replace(/_/g, ' ').trim();
-	            titles.push(localeSitelink);
-	        }
-
-	        if (rtypeSitelink) {
-	            if (_wikibaseCache[rtypeSitelink]) {
-	                result.rtype = _wikibaseCache[rtypeSitelink];
-	            } else {
-	                titles.push(rtypeSitelink);
-	            }
-	        }
+	      var intersectionBy = baseRest(function (arrays) {
+	        var iteratee = last(arrays),
+	            mapped = arrayMap(arrays, castArrayLikeObject);
 
-	        if (keySitelink) {
-	            if (_wikibaseCache[keySitelink]) {
-	                result.key = _wikibaseCache[keySitelink];
-	            } else {
-	                titles.push(keySitelink);
-	            }
+	        if (iteratee === last(mapped)) {
+	          iteratee = undefined$1;
+	        } else {
+	          mapped.pop();
 	        }
 
-	        if (tagSitelink) {
-	            if (_wikibaseCache[tagSitelink]) {
-	                result.tag = _wikibaseCache[tagSitelink];
-	            } else {
-	                titles.push(tagSitelink);
-	            }
-	        }
+	        return mapped.length && mapped[0] === arrays[0] ? baseIntersection(mapped, getIteratee(iteratee, 2)) : [];
+	      });
+	      /**
+	       * This method is like `_.intersection` except that it accepts `comparator`
+	       * which is invoked to compare elements of `arrays`. The order and references
+	       * of result values are determined by the first array. The comparator is
+	       * invoked with two arguments: (arrVal, othVal).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new array of intersecting values.
+	       * @example
+	       *
+	       * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+	       * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+	       *
+	       * _.intersectionWith(objects, others, _.isEqual);
+	       * // => [{ 'x': 1, 'y': 2 }]
+	       */
 
-	        if (!titles.length) {
-	            // Nothing to do, we already had everything in the cache
-	            return callback(null, result);
-	        }
-
-	        // Requesting just the user language code
-	        // If backend recognizes the code, it will perform proper fallbacks,
-	        // and the result will contain the requested code. If not, all values are returned:
-	        // {"zh-tw":{"value":"...","language":"zh-tw","source-language":"zh-hant"}
-	        // {"pt-br":{"value":"...","language":"pt","for-language":"pt-br"}}
-	        var obj = {
-	            action: 'wbgetentities',
-	            sites: 'wiki',
-	            titles: titles.join('|'),
-	            languages: params.langCode,
-	            languagefallback: 1,
-	            origin: '*',
-	            format: 'json',
-	            // There is an MW Wikibase API bug https://phabricator.wikimedia.org/T212069
-	            // We shouldn't use v1 until it gets fixed, but should switch to it afterwards
-	            // formatversion: 2,
-	        };
+	      var intersectionWith = baseRest(function (arrays) {
+	        var comparator = last(arrays),
+	            mapped = arrayMap(arrays, castArrayLikeObject);
+	        comparator = typeof comparator == 'function' ? comparator : undefined$1;
 
-	        var url = apibase$3 + '?' + utilQsString(obj);
-	        doRequest(url, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else if (!d.success || d.error) {
-	                callback(d.error.messages.map(function(v) { return v.html['*']; }).join('<br>'));
-	            } else {
-	                var localeID = false;
-	                Object.values(d.entities).forEach(function(res) {
-	                    if (res.missing !== '') {
-	                        // Simplify access to the localized values
-	                        res.description = localizedToString(res.descriptions, params.langCode);
-	                        res.label = localizedToString(res.labels, params.langCode);
-
-	                        var title = res.sitelinks.wiki.title;
-	                        if (title === rtypeSitelink) {
-	                            _wikibaseCache[rtypeSitelink] = res;
-	                            result.rtype = res;
-	                        } else if (title === keySitelink) {
-	                            _wikibaseCache[keySitelink] = res;
-	                            result.key = res;
-	                        } else if (title === tagSitelink) {
-	                            _wikibaseCache[tagSitelink] = res;
-	                            result.tag = res;
-	                        } else if (title === localeSitelink) {
-	                            localeID = res.id;
-	                        } else {
-	                            console.log('Unexpected title ' + title);  // eslint-disable-line no-console
-	                        }
-	                    }
-	                });
+	        if (comparator) {
+	          mapped.pop();
+	        }
 
-	                if (localeSitelink) {
-	                    // If locale ID is not found, store false to prevent repeated queries
-	                    that.addLocale(params.langCode, localeID);
-	                }
+	        return mapped.length && mapped[0] === arrays[0] ? baseIntersection(mapped, undefined$1, comparator) : [];
+	      });
+	      /**
+	       * Converts all elements in `array` into a string separated by `separator`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to convert.
+	       * @param {string} [separator=','] The element separator.
+	       * @returns {string} Returns the joined string.
+	       * @example
+	       *
+	       * _.join(['a', 'b', 'c'], '~');
+	       * // => 'a~b~c'
+	       */
 
-	                callback(null, result);
-	            }
-	        });
-	    },
+	      function join(array, separator) {
+	        return array == null ? '' : nativeJoin.call(array, separator);
+	      }
+	      /**
+	       * Gets the last element of `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @returns {*} Returns the last element of `array`.
+	       * @example
+	       *
+	       * _.last([1, 2, 3]);
+	       * // => 3
+	       */
 
 
-	    //
-	    // Pass params object of the form:
-	    // {
-	    //   key: 'string',     // required
-	    //   value: 'string'    // optional
-	    // }
-	    //   -or-
-	    // {
-	    //   rtype: 'rtype'     // relation type  (e.g. 'multipolygon')
-	    // }
-	    //
-	    // Get an result object used to display tag documentation
-	    // {
-	    //   title:        'string',
-	    //   description:  'string',
-	    //   editURL:      'string',
-	    //   imageURL:     'string',
-	    //   wiki:         { title: 'string', text: 'string', url: 'string' }
-	    // }
-	    //
-	    getDocs: function(params, callback) {
-	        var that = this;
-	        var langCode = _mainLocalizer.localeCode().toLowerCase();
-	        params.langCode = langCode;
+	      function last(array) {
+	        var length = array == null ? 0 : array.length;
+	        return length ? array[length - 1] : undefined$1;
+	      }
+	      /**
+	       * This method is like `_.indexOf` except that it iterates over elements of
+	       * `array` from right to left.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {*} value The value to search for.
+	       * @param {number} [fromIndex=array.length-1] The index to search from.
+	       * @returns {number} Returns the index of the matched value, else `-1`.
+	       * @example
+	       *
+	       * _.lastIndexOf([1, 2, 1, 2], 2);
+	       * // => 3
+	       *
+	       * // Search from the `fromIndex`.
+	       * _.lastIndexOf([1, 2, 1, 2], 2, 2);
+	       * // => 1
+	       */
 
-	        this.getEntity(params, function(err, data) {
-	            if (err) {
-	                callback(err);
-	                return;
-	            }
 
-	            var entity = data.rtype || data.tag || data.key;
-	            if (!entity) {
-	                callback('No entity');
-	                return;
-	            }
+	      function lastIndexOf(array, value, fromIndex) {
+	        var length = array == null ? 0 : array.length;
 
-	            // prepare result
-	            var result = {
-	                title: entity.title,
-	                description: entity.description,
-	                editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
-	            };
+	        if (!length) {
+	          return -1;
+	        }
 
-	            // add image
-	            if (entity.claims) {
-	                var imageroot;
-	                var image = that.claimToValue(entity, 'P4', langCode);
-	                if (image) {
-	                    imageroot = 'https://commons.wikimedia.org/w/index.php';
-	                } else {
-	                    image = that.claimToValue(entity, 'P28', langCode);
-	                    if (image) {
-	                        imageroot = 'https://wiki.openstreetmap.org/w/index.php';
-	                    }
-	                }
-	                if (imageroot && image) {
-	                    result.imageURL = imageroot + '?' + utilQsString({
-	                        title: 'Special:Redirect/file/' + image,
-	                        width: 400
-	                    });
-	                }
-	            }
+	        var index = length;
 
-	            // Try to get a wiki page from tag data item first, followed by the corresponding key data item.
-	            // If neither tag nor key data item contain a wiki page in the needed language nor English,
-	            // get the first found wiki page from either the tag or the key item.
-	            var rtypeWiki = that.monolingualClaimToValueObj(data.rtype, 'P31');
-	            var tagWiki = that.monolingualClaimToValueObj(data.tag, 'P31');
-	            var keyWiki = that.monolingualClaimToValueObj(data.key, 'P31');
-
-	            // If exact language code does not exist, try to find the first part before the '-'
-	            // BUG: in some cases, a more elaborate fallback logic might be needed
-	            var langPrefix = langCode.split('-', 2)[0];
-
-	            // use the first acceptable wiki page
-	            result.wiki =
-	                getWikiInfo(rtypeWiki, langCode, 'inspector.wiki_reference') ||
-	                getWikiInfo(rtypeWiki, langPrefix, 'inspector.wiki_reference') ||
-	                getWikiInfo(rtypeWiki, 'en', 'inspector.wiki_en_reference') ||
-	                getWikiInfo(tagWiki, langCode, 'inspector.wiki_reference') ||
-	                getWikiInfo(tagWiki, langPrefix, 'inspector.wiki_reference') ||
-	                getWikiInfo(tagWiki, 'en', 'inspector.wiki_en_reference') ||
-	                getWikiInfo(keyWiki, langCode, 'inspector.wiki_reference') ||
-	                getWikiInfo(keyWiki, langPrefix, 'inspector.wiki_reference') ||
-	                getWikiInfo(keyWiki, 'en', 'inspector.wiki_en_reference');
-
-	            callback(null, result);
-
-
-	            // Helper method to get wiki info if a given language exists
-	            function getWikiInfo(wiki, langCode, tKey) {
-	                if (wiki && wiki[langCode]) {
-	                    return {
-	                        title: wiki[langCode],
-	                        text: tKey,
-	                        url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
-	                    };
-	                }
-	            }
-	        });
-	    },
+	        if (fromIndex !== undefined$1) {
+	          index = toInteger(fromIndex);
+	          index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
+	        }
 
+	        return value === value ? strictLastIndexOf(array, value, index) : baseFindIndex(array, baseIsNaN, index, true);
+	      }
+	      /**
+	       * Gets the element at index `n` of `array`. If `n` is negative, the nth
+	       * element from the end is returned.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.11.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {number} [n=0] The index of the element to return.
+	       * @returns {*} Returns the nth element of `array`.
+	       * @example
+	       *
+	       * var array = ['a', 'b', 'c', 'd'];
+	       *
+	       * _.nth(array, 1);
+	       * // => 'b'
+	       *
+	       * _.nth(array, -2);
+	       * // => 'c';
+	       */
 
-	    addLocale: function(langCode, qid) {
-	        // Makes it easier to unit test
-	        _localeIDs[langCode] = qid;
-	    },
 
+	      function nth(array, n) {
+	        return array && array.length ? baseNth(array, toInteger(n)) : undefined$1;
+	      }
+	      /**
+	       * Removes all given values from `array` using
+	       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons.
+	       *
+	       * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
+	       * to remove elements from an array by predicate.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Array
+	       * @param {Array} array The array to modify.
+	       * @param {...*} [values] The values to remove.
+	       * @returns {Array} Returns `array`.
+	       * @example
+	       *
+	       * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
+	       *
+	       * _.pull(array, 'a', 'c');
+	       * console.log(array);
+	       * // => ['b', 'b']
+	       */
 
-	    apibase: function(val) {
-	        if (!arguments.length) { return apibase$3; }
-	        apibase$3 = val;
-	        return this;
-	    }
 
-	};
+	      var pull = baseRest(pullAll);
+	      /**
+	       * This method is like `_.pull` except that it accepts an array of values to remove.
+	       *
+	       * **Note:** Unlike `_.difference`, this method mutates `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to modify.
+	       * @param {Array} values The values to remove.
+	       * @returns {Array} Returns `array`.
+	       * @example
+	       *
+	       * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
+	       *
+	       * _.pullAll(array, ['a', 'c']);
+	       * console.log(array);
+	       * // => ['b', 'b']
+	       */
 
-	var jsonpCache = {};
-	window.jsonpCache = jsonpCache;
+	      function pullAll(array, values) {
+	        return array && array.length && values && values.length ? basePullAll(array, values) : array;
+	      }
+	      /**
+	       * This method is like `_.pullAll` except that it accepts `iteratee` which is
+	       * invoked for each element of `array` and `values` to generate the criterion
+	       * by which they're compared. The iteratee is invoked with one argument: (value).
+	       *
+	       * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to modify.
+	       * @param {Array} values The values to remove.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {Array} Returns `array`.
+	       * @example
+	       *
+	       * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
+	       *
+	       * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
+	       * console.log(array);
+	       * // => [{ 'x': 2 }]
+	       */
 
-	function jsonpRequest(url, callback) {
-	    var request = {
-	        abort: function() {}
-	    };
 
-	    if (window.JSONP_FIX) {
-	        if (window.JSONP_DELAY === 0) {
-	            callback(window.JSONP_FIX);
-	        } else {
-	            var t = window.setTimeout(function() {
-	                callback(window.JSONP_FIX);
-	            }, window.JSONP_DELAY || 0);
+	      function pullAllBy(array, values, iteratee) {
+	        return array && array.length && values && values.length ? basePullAll(array, values, getIteratee(iteratee, 2)) : array;
+	      }
+	      /**
+	       * This method is like `_.pullAll` except that it accepts `comparator` which
+	       * is invoked to compare elements of `array` to `values`. The comparator is
+	       * invoked with two arguments: (arrVal, othVal).
+	       *
+	       * **Note:** Unlike `_.differenceWith`, this method mutates `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.6.0
+	       * @category Array
+	       * @param {Array} array The array to modify.
+	       * @param {Array} values The values to remove.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns `array`.
+	       * @example
+	       *
+	       * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
+	       *
+	       * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
+	       * console.log(array);
+	       * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
+	       */
 
-	            request.abort = function() { window.clearTimeout(t); };
-	        }
 
-	        return request;
-	    }
+	      function pullAllWith(array, values, comparator) {
+	        return array && array.length && values && values.length ? basePullAll(array, values, undefined$1, comparator) : array;
+	      }
+	      /**
+	       * Removes elements from `array` corresponding to `indexes` and returns an
+	       * array of removed elements.
+	       *
+	       * **Note:** Unlike `_.at`, this method mutates `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to modify.
+	       * @param {...(number|number[])} [indexes] The indexes of elements to remove.
+	       * @returns {Array} Returns the new array of removed elements.
+	       * @example
+	       *
+	       * var array = ['a', 'b', 'c', 'd'];
+	       * var pulled = _.pullAt(array, [1, 3]);
+	       *
+	       * console.log(array);
+	       * // => ['a', 'c']
+	       *
+	       * console.log(pulled);
+	       * // => ['b', 'd']
+	       */
 
-	    function rand() {
-	        var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
-	        var c = '';
-	        var i = -1;
-	        while (++i < 15) { c += chars.charAt(Math.floor(Math.random() * 52)); }
-	        return c;
-	    }
 
-	    function create(url) {
-	        var e = url.match(/callback=(\w+)/);
-	        var c = e ? e[1] : rand();
+	      var pullAt = flatRest(function (array, indexes) {
+	        var length = array == null ? 0 : array.length,
+	            result = baseAt(array, indexes);
+	        basePullAt(array, arrayMap(indexes, function (index) {
+	          return isIndex(index, length) ? +index : index;
+	        }).sort(compareAscending));
+	        return result;
+	      });
+	      /**
+	       * Removes all elements from `array` that `predicate` returns truthy for
+	       * and returns an array of the removed elements. The predicate is invoked
+	       * with three arguments: (value, index, array).
+	       *
+	       * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
+	       * to pull elements from an array by value.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Array
+	       * @param {Array} array The array to modify.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the new array of removed elements.
+	       * @example
+	       *
+	       * var array = [1, 2, 3, 4];
+	       * var evens = _.remove(array, function(n) {
+	       *   return n % 2 == 0;
+	       * });
+	       *
+	       * console.log(array);
+	       * // => [1, 3]
+	       *
+	       * console.log(evens);
+	       * // => [2, 4]
+	       */
 
-	        jsonpCache[c] = function(data) {
-	            if (jsonpCache[c]) {
-	                callback(data);
-	            }
-	            finalize();
-	        };
+	      function remove(array, predicate) {
+	        var result = [];
 
-	        function finalize() {
-	            delete jsonpCache[c];
-	            script.remove();
+	        if (!(array && array.length)) {
+	          return result;
 	        }
 
-	        request.abort = finalize;
-	        return 'jsonpCache.' + c;
-	    }
-
-	    var cb = create(url);
-
-	    var script = select('head')
-	        .append('script')
-	        .attr('type', 'text/javascript')
-	        .attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
+	        var index = -1,
+	            indexes = [],
+	            length = array.length;
+	        predicate = getIteratee(predicate, 3);
 
-	    return request;
-	}
+	        while (++index < length) {
+	          var value = array[index];
 
-	var bubbleApi = 'https://dev.virtualearth.net/mapcontrol/HumanScaleServices/GetBubbles.ashx?';
-	var streetsideImagesApi = 'https://t.ssl.ak.tiles.virtualearth.net/tiles/';
-	var bubbleAppKey = 'AuftgJsO0Xs8Ts4M1xZUQJQXJNsvmh3IV8DkNieCiy3tCwCUMq76-WpkrBtNAuEm';
-	var pannellumViewerCSS = 'pannellum-streetside/pannellum.css';
-	var pannellumViewerJS = 'pannellum-streetside/pannellum.js';
-	var maxResults$2 = 2000;
-	var tileZoom$2 = 16.5;
-	var tiler$6 = utilTiler().zoomExtent([tileZoom$2, tileZoom$2]).skipNullIsland(true);
-	var dispatch$7 = dispatch('loadedBubbles', 'viewerChanged');
-	var minHfov = 10;         // zoom in degrees:  20, 10, 5
-	var maxHfov = 90;         // zoom out degrees
-	var defaultHfov = 45;
+	          if (predicate(value, index, array)) {
+	            result.push(value);
+	            indexes.push(index);
+	          }
+	        }
 
-	var _hires = false;
-	var _resolution = 512;    // higher numbers are slower - 512, 1024, 2048, 4096
-	var _currScene = 0;
-	var _ssCache;
-	var _pannellumViewer;
-	var _sceneOptions;
-	var _dataUrlArray = [];
+	        basePullAt(array, indexes);
+	        return result;
+	      }
+	      /**
+	       * Reverses `array` so that the first element becomes the last, the second
+	       * element becomes the second to last, and so on.
+	       *
+	       * **Note:** This method mutates `array` and is based on
+	       * [`Array#reverse`](https://mdn.io/Array/reverse).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to modify.
+	       * @returns {Array} Returns `array`.
+	       * @example
+	       *
+	       * var array = [1, 2, 3];
+	       *
+	       * _.reverse(array);
+	       * // => [3, 2, 1]
+	       *
+	       * console.log(array);
+	       * // => [3, 2, 1]
+	       */
 
 
-	/**
-	 * abortRequest().
-	 */
-	function abortRequest$6(i) {
-	  i.abort();
-	}
+	      function reverse(array) {
+	        return array == null ? array : nativeReverse.call(array);
+	      }
+	      /**
+	       * Creates a slice of `array` from `start` up to, but not including, `end`.
+	       *
+	       * **Note:** This method is used instead of
+	       * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
+	       * returned.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to slice.
+	       * @param {number} [start=0] The start position.
+	       * @param {number} [end=array.length] The end position.
+	       * @returns {Array} Returns the slice of `array`.
+	       */
 
 
-	/**
-	 * localeTimeStamp().
-	 */
-	function localeTimestamp(s) {
-	  if (!s) { return null; }
-	  var options = { day: 'numeric', month: 'short', year: 'numeric' };
-	  var d = new Date(s);
-	  if (isNaN(d.getTime())) { return null; }
-	  return d.toLocaleString(_mainLocalizer.localeCode(), options);
-	}
+	      function slice(array, start, end) {
+	        var length = array == null ? 0 : array.length;
 
+	        if (!length) {
+	          return [];
+	        }
 
-	/**
-	 * loadTiles() wraps the process of generating tiles and then fetching image points for each tile.
-	 */
-	function loadTiles$2(which, url, projection, margin) {
-	  var tiles = tiler$6.margin(margin).getTiles(projection);
+	        if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
+	          start = 0;
+	          end = length;
+	        } else {
+	          start = start == null ? 0 : toInteger(start);
+	          end = end === undefined$1 ? length : toInteger(end);
+	        }
 
-	  // abort inflight requests that are no longer needed
-	  var cache = _ssCache[which];
-	  Object.keys(cache.inflight).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) { return k.indexOf(tile.id + ',') === 0; });
-	    if (!wanted) {
-	      abortRequest$6(cache.inflight[k]);
-	      delete cache.inflight[k];
-	    }
-	  });
+	        return baseSlice(array, start, end);
+	      }
+	      /**
+	       * Uses a binary search to determine the lowest index at which `value`
+	       * should be inserted into `array` in order to maintain its sort order.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The sorted array to inspect.
+	       * @param {*} value The value to evaluate.
+	       * @returns {number} Returns the index at which `value` should be inserted
+	       *  into `array`.
+	       * @example
+	       *
+	       * _.sortedIndex([30, 50], 40);
+	       * // => 1
+	       */
 
-	  tiles.forEach(function (tile) { return loadNextTilePage$2(which, url, tile); });
-	}
 
+	      function sortedIndex(array, value) {
+	        return baseSortedIndex(array, value);
+	      }
+	      /**
+	       * This method is like `_.sortedIndex` except that it accepts `iteratee`
+	       * which is invoked for `value` and each element of `array` to compute their
+	       * sort ranking. The iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The sorted array to inspect.
+	       * @param {*} value The value to evaluate.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {number} Returns the index at which `value` should be inserted
+	       *  into `array`.
+	       * @example
+	       *
+	       * var objects = [{ 'x': 4 }, { 'x': 5 }];
+	       *
+	       * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+	       * // => 0
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
+	       * // => 0
+	       */
 
-	/**
-	 * loadNextTilePage() load data for the next tile page in line.
-	 */
-	function loadNextTilePage$2(which, url, tile) {
-	  var cache = _ssCache[which];
-	  var nextPage = cache.nextPage[tile.id] || 0;
-	  var id = tile.id + ',' + String(nextPage);
-	  if (cache.loaded[id] || cache.inflight[id]) { return; }
 
-	  cache.inflight[id] = getBubbles(url, tile, function (bubbles) {
-	    cache.loaded[id] = true;
-	    delete cache.inflight[id];
-	    if (!bubbles) { return; }
+	      function sortedIndexBy(array, value, iteratee) {
+	        return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));
+	      }
+	      /**
+	       * This method is like `_.indexOf` except that it performs a binary
+	       * search on a sorted `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {*} value The value to search for.
+	       * @returns {number} Returns the index of the matched value, else `-1`.
+	       * @example
+	       *
+	       * _.sortedIndexOf([4, 5, 5, 5, 6], 5);
+	       * // => 1
+	       */
 
-	    // [].shift() removes the first element, some statistics info, not a bubble point
-	    bubbles.shift();
 
-	    var features = bubbles.map(function (bubble) {
-	      if (cache.points[bubble.id]) { return null; }  // skip duplicates
+	      function sortedIndexOf(array, value) {
+	        var length = array == null ? 0 : array.length;
 
-	      var loc = [bubble.lo, bubble.la];
-	      var d = {
-	        loc: loc,
-	        key: bubble.id,
-	        ca: bubble.he,
-	        captured_at: bubble.cd,
-	        captured_by: 'microsoft',
-	        // nbn: bubble.nbn,
-	        // pbn: bubble.pbn,
-	        // ad: bubble.ad,
-	        // rn: bubble.rn,
-	        pr: bubble.pr,  // previous
-	        ne: bubble.ne,  // next
-	        pano: true,
-	        sequenceKey: null
-	      };
+	        if (length) {
+	          var index = baseSortedIndex(array, value);
 
-	      cache.points[bubble.id] = d;
+	          if (index < length && eq(array[index], value)) {
+	            return index;
+	          }
+	        }
 
-	      // a sequence starts here
-	      if (bubble.pr === undefined) {
-	        cache.leaders.push(bubble.id);
+	        return -1;
 	      }
+	      /**
+	       * This method is like `_.sortedIndex` except that it returns the highest
+	       * index at which `value` should be inserted into `array` in order to
+	       * maintain its sort order.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The sorted array to inspect.
+	       * @param {*} value The value to evaluate.
+	       * @returns {number} Returns the index at which `value` should be inserted
+	       *  into `array`.
+	       * @example
+	       *
+	       * _.sortedLastIndex([4, 5, 5, 5, 6], 5);
+	       * // => 4
+	       */
 
-	      return {
-	        minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1], data: d
-	      };
 
-	    }).filter(Boolean);
+	      function sortedLastIndex(array, value) {
+	        return baseSortedIndex(array, value, true);
+	      }
+	      /**
+	       * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
+	       * which is invoked for `value` and each element of `array` to compute their
+	       * sort ranking. The iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The sorted array to inspect.
+	       * @param {*} value The value to evaluate.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {number} Returns the index at which `value` should be inserted
+	       *  into `array`.
+	       * @example
+	       *
+	       * var objects = [{ 'x': 4 }, { 'x': 5 }];
+	       *
+	       * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+	       * // => 1
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
+	       * // => 1
+	       */
 
-	    cache.rtree.load(features);
 
-	    connectSequences();
+	      function sortedLastIndexBy(array, value, iteratee) {
+	        return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);
+	      }
+	      /**
+	       * This method is like `_.lastIndexOf` except that it performs a binary
+	       * search on a sorted `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {*} value The value to search for.
+	       * @returns {number} Returns the index of the matched value, else `-1`.
+	       * @example
+	       *
+	       * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
+	       * // => 3
+	       */
 
-	    if (which === 'bubbles') {
-	      dispatch$7.call('loadedBubbles');
-	    }
-	  });
-	}
 
+	      function sortedLastIndexOf(array, value) {
+	        var length = array == null ? 0 : array.length;
 
-	// call this sometimes to connect the bubbles into sequences
-	function connectSequences() {
-	  var cache = _ssCache.bubbles;
-	  var keepLeaders = [];
+	        if (length) {
+	          var index = baseSortedIndex(array, value, true) - 1;
 
-	  for (var i = 0; i < cache.leaders.length; i++) {
-	    var bubble = cache.points[cache.leaders[i]];
-	    var seen = {};
+	          if (eq(array[index], value)) {
+	            return index;
+	          }
+	        }
 
-	    // try to make a sequence.. use the key of the leader bubble.
-	    var sequence = { key: bubble.key, bubbles: [] };
-	    var complete = false;
+	        return -1;
+	      }
+	      /**
+	       * This method is like `_.uniq` except that it's designed and optimized
+	       * for sorted arrays.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @returns {Array} Returns the new duplicate free array.
+	       * @example
+	       *
+	       * _.sortedUniq([1, 1, 2]);
+	       * // => [1, 2]
+	       */
 
-	    do {
-	      sequence.bubbles.push(bubble);
-	      seen[bubble.key] = true;
 
-	      if (bubble.ne === undefined) {
-	        complete = true;
-	      } else {
-	        bubble = cache.points[bubble.ne];  // advance to next
+	      function sortedUniq(array) {
+	        return array && array.length ? baseSortedUniq(array) : [];
 	      }
-	    } while (bubble && !seen[bubble.key] && !complete);
+	      /**
+	       * This method is like `_.uniqBy` except that it's designed and optimized
+	       * for sorted arrays.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {Function} [iteratee] The iteratee invoked per element.
+	       * @returns {Array} Returns the new duplicate free array.
+	       * @example
+	       *
+	       * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
+	       * // => [1.1, 2.3]
+	       */
 
 
-	    if (complete) {
-	      _ssCache.sequences[sequence.key] = sequence;
+	      function sortedUniqBy(array, iteratee) {
+	        return array && array.length ? baseSortedUniq(array, getIteratee(iteratee, 2)) : [];
+	      }
+	      /**
+	       * Gets all but the first element of `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * _.tail([1, 2, 3]);
+	       * // => [2, 3]
+	       */
 
-	      // assign bubbles to the sequence
-	      for (var j = 0; j < sequence.bubbles.length; j++) {
-	        sequence.bubbles[j].sequenceKey = sequence.key;
+
+	      function tail(array) {
+	        var length = array == null ? 0 : array.length;
+	        return length ? baseSlice(array, 1, length) : [];
 	      }
+	      /**
+	       * Creates a slice of `array` with `n` elements taken from the beginning.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {number} [n=1] The number of elements to take.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * _.take([1, 2, 3]);
+	       * // => [1]
+	       *
+	       * _.take([1, 2, 3], 2);
+	       * // => [1, 2]
+	       *
+	       * _.take([1, 2, 3], 5);
+	       * // => [1, 2, 3]
+	       *
+	       * _.take([1, 2, 3], 0);
+	       * // => []
+	       */
 
-	      // create a GeoJSON LineString
-	      sequence.geojson = {
-	        type: 'LineString',
-	        properties: { key: sequence.key },
-	        coordinates: sequence.bubbles.map(function (d) { return d.loc; })
-	      };
 
-	    } else {
-	      keepLeaders.push(cache.leaders[i]);
-	    }
-	  }
+	      function take(array, n, guard) {
+	        if (!(array && array.length)) {
+	          return [];
+	        }
 
-	  // couldn't complete these, save for later
-	  cache.leaders = keepLeaders;
-	}
+	        n = guard || n === undefined$1 ? 1 : toInteger(n);
+	        return baseSlice(array, 0, n < 0 ? 0 : n);
+	      }
+	      /**
+	       * Creates a slice of `array` with `n` elements taken from the end.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {number} [n=1] The number of elements to take.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * _.takeRight([1, 2, 3]);
+	       * // => [3]
+	       *
+	       * _.takeRight([1, 2, 3], 2);
+	       * // => [2, 3]
+	       *
+	       * _.takeRight([1, 2, 3], 5);
+	       * // => [1, 2, 3]
+	       *
+	       * _.takeRight([1, 2, 3], 0);
+	       * // => []
+	       */
 
 
-	/**
-	 * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
-	 */
-	function getBubbles(url, tile, callback) {
-	  var rect = tile.extent.rectangle();
-	  var urlForRequest = url + utilQsString({
-	    n: rect[3],
-	    s: rect[1],
-	    e: rect[2],
-	    w: rect[0],
-	    c: maxResults$2,
-	    appkey: bubbleAppKey,
-	    jsCallback: '{callback}'
-	  });
+	      function takeRight(array, n, guard) {
+	        var length = array == null ? 0 : array.length;
 
-	  return jsonpRequest(urlForRequest, function (data) {
-	    if (!data || data.error) {
-	      callback(null);
-	    } else {
-	      callback(data);
-	    }
-	  });
-	}
+	        if (!length) {
+	          return [];
+	        }
 
+	        n = guard || n === undefined$1 ? 1 : toInteger(n);
+	        n = length - n;
+	        return baseSlice(array, n < 0 ? 0 : n, length);
+	      }
+	      /**
+	       * Creates a slice of `array` with elements taken from the end. Elements are
+	       * taken until `predicate` returns falsey. The predicate is invoked with
+	       * three arguments: (value, index, array).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'active': true },
+	       *   { 'user': 'fred',    'active': false },
+	       *   { 'user': 'pebbles', 'active': false }
+	       * ];
+	       *
+	       * _.takeRightWhile(users, function(o) { return !o.active; });
+	       * // => objects for ['fred', 'pebbles']
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
+	       * // => objects for ['pebbles']
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.takeRightWhile(users, ['active', false]);
+	       * // => objects for ['fred', 'pebbles']
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.takeRightWhile(users, 'active');
+	       * // => []
+	       */
 
-	// partition viewport into higher zoom tiles
-	function partitionViewport$2(projection) {
-	  var z = geoScaleToZoom(projection.scale());
-	  var z2 = (Math.ceil(z * 2) / 2) + 2.5;   // round to next 0.5 and add 2.5
-	  var tiler = utilTiler().zoomExtent([z2, z2]);
 
-	  return tiler.getTiles(projection)
-	    .map(function (tile) { return tile.extent; });
-	}
+	      function takeRightWhile(array, predicate) {
+	        return array && array.length ? baseWhile(array, getIteratee(predicate, 3), false, true) : [];
+	      }
+	      /**
+	       * Creates a slice of `array` with elements taken from the beginning. Elements
+	       * are taken until `predicate` returns falsey. The predicate is invoked with
+	       * three arguments: (value, index, array).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Array
+	       * @param {Array} array The array to query.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the slice of `array`.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'active': false },
+	       *   { 'user': 'fred',    'active': false },
+	       *   { 'user': 'pebbles', 'active': true }
+	       * ];
+	       *
+	       * _.takeWhile(users, function(o) { return !o.active; });
+	       * // => objects for ['barney', 'fred']
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.takeWhile(users, { 'user': 'barney', 'active': false });
+	       * // => objects for ['barney']
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.takeWhile(users, ['active', false]);
+	       * // => objects for ['barney', 'fred']
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.takeWhile(users, 'active');
+	       * // => []
+	       */
 
 
-	// no more than `limit` results per partition.
-	function searchLimited$2(limit, projection, rtree) {
-	  limit = limit || 5;
+	      function takeWhile(array, predicate) {
+	        return array && array.length ? baseWhile(array, getIteratee(predicate, 3)) : [];
+	      }
+	      /**
+	       * Creates an array of unique values, in order, from all given arrays using
+	       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @returns {Array} Returns the new array of combined values.
+	       * @example
+	       *
+	       * _.union([2], [1, 2]);
+	       * // => [2, 1]
+	       */
 
-	  return partitionViewport$2(projection)
-	    .reduce(function (result, extent) {
-	      var found = rtree.search(extent.bbox())
-	        .slice(0, limit)
-	        .map(function (d) { return d.data; });
 
-	      return (found.length ? result.concat(found) : result);
-	    }, []);
-	}
+	      var union = baseRest(function (arrays) {
+	        return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
+	      });
+	      /**
+	       * This method is like `_.union` except that it accepts `iteratee` which is
+	       * invoked for each element of each `arrays` to generate the criterion by
+	       * which uniqueness is computed. Result values are chosen from the first
+	       * array in which the value occurs. The iteratee is invoked with one argument:
+	       * (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {Array} Returns the new array of combined values.
+	       * @example
+	       *
+	       * _.unionBy([2.1], [1.2, 2.3], Math.floor);
+	       * // => [2.1, 1.2]
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+	       * // => [{ 'x': 1 }, { 'x': 2 }]
+	       */
 
+	      var unionBy = baseRest(function (arrays) {
+	        var iteratee = last(arrays);
 
-	/**
-	 * loadImage()
-	 */
-	function loadImage(imgInfo) {
-	  return new Promise(function (resolve) {
-	    var img = new Image();
-	    img.onload = function () {
-	      var canvas = document.getElementById('ideditor-canvas' + imgInfo.face);
-	      var ctx = canvas.getContext('2d');
-	      ctx.drawImage(img, imgInfo.x, imgInfo.y);
-	      resolve({ imgInfo: imgInfo, status: 'ok' });
-	    };
-	    img.onerror = function () {
-	      resolve({ data: imgInfo, status: 'error' });
-	    };
-	    img.setAttribute('crossorigin', '');
-	    img.src = imgInfo.url;
-	  });
-	}
+	        if (isArrayLikeObject(iteratee)) {
+	          iteratee = undefined$1;
+	        }
 
+	        return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));
+	      });
+	      /**
+	       * This method is like `_.union` except that it accepts `comparator` which
+	       * is invoked to compare elements of `arrays`. Result values are chosen from
+	       * the first array in which the value occurs. The comparator is invoked
+	       * with two arguments: (arrVal, othVal).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new array of combined values.
+	       * @example
+	       *
+	       * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+	       * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+	       *
+	       * _.unionWith(objects, others, _.isEqual);
+	       * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
+	       */
 
-	/**
-	 * loadCanvas()
-	 */
-	function loadCanvas(imageGroup) {
-	  return Promise.all(imageGroup.map(loadImage))
-	    .then(function (data) {
-	      var canvas = document.getElementById('ideditor-canvas' + data[0].imgInfo.face);
-	      var which = { '01': 0, '02': 1, '03': 2, '10': 3, '11': 4, '12': 5 };
-	      var face = data[0].imgInfo.face;
-	      _dataUrlArray[which[face]] = canvas.toDataURL('image/jpeg', 1.0);
-	      return { status: 'loadCanvas for face ' + data[0].imgInfo.face + 'ok'};
-	    });
-	}
+	      var unionWith = baseRest(function (arrays) {
+	        var comparator = last(arrays);
+	        comparator = typeof comparator == 'function' ? comparator : undefined$1;
+	        return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined$1, comparator);
+	      });
+	      /**
+	       * Creates a duplicate-free version of an array, using
+	       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons, in which only the first occurrence of each element
+	       * is kept. The order of result values is determined by the order they occur
+	       * in the array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @returns {Array} Returns the new duplicate free array.
+	       * @example
+	       *
+	       * _.uniq([2, 1, 2]);
+	       * // => [2, 1]
+	       */
 
+	      function uniq(array) {
+	        return array && array.length ? baseUniq(array) : [];
+	      }
+	      /**
+	       * This method is like `_.uniq` except that it accepts `iteratee` which is
+	       * invoked for each element in `array` to generate the criterion by which
+	       * uniqueness is computed. The order of result values is determined by the
+	       * order they occur in the array. The iteratee is invoked with one argument:
+	       * (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {Array} Returns the new duplicate free array.
+	       * @example
+	       *
+	       * _.uniqBy([2.1, 1.2, 2.3], Math.floor);
+	       * // => [2.1, 1.2]
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
+	       * // => [{ 'x': 1 }, { 'x': 2 }]
+	       */
 
-	/**
-	 * loadFaces()
-	 */
-	function loadFaces(faceGroup) {
-	  return Promise.all(faceGroup.map(loadCanvas))
-	    .then(function () { return { status: 'loadFaces done' }; });
-	}
 
+	      function uniqBy(array, iteratee) {
+	        return array && array.length ? baseUniq(array, getIteratee(iteratee, 2)) : [];
+	      }
+	      /**
+	       * This method is like `_.uniq` except that it accepts `comparator` which
+	       * is invoked to compare elements of `array`. The order of result values is
+	       * determined by the order they occur in the array.The comparator is invoked
+	       * with two arguments: (arrVal, othVal).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new duplicate free array.
+	       * @example
+	       *
+	       * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
+	       *
+	       * _.uniqWith(objects, _.isEqual);
+	       * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
+	       */
 
-	function setupCanvas(selection, reset) {
-	  if (reset) {
-	    selection.selectAll('#ideditor-stitcher-canvases')
-	      .remove();
-	  }
 
-	  // Add the Streetside working canvases. These are used for 'stitching', or combining,
-	  // multiple images for each of the six faces, before passing to the Pannellum control as DataUrls
-	  selection.selectAll('#ideditor-stitcher-canvases')
-	    .data([0])
-	    .enter()
-	    .append('div')
-	    .attr('id', 'ideditor-stitcher-canvases')
-	    .attr('display', 'none')
-	    .selectAll('canvas')
-	    .data(['canvas01', 'canvas02', 'canvas03', 'canvas10', 'canvas11', 'canvas12'])
-	    .enter()
-	    .append('canvas')
-	    .attr('id', function (d) { return 'ideditor-' + d; })
-	    .attr('width', _resolution)
-	    .attr('height', _resolution);
-	}
+	      function uniqWith(array, comparator) {
+	        comparator = typeof comparator == 'function' ? comparator : undefined$1;
+	        return array && array.length ? baseUniq(array, undefined$1, comparator) : [];
+	      }
+	      /**
+	       * This method is like `_.zip` except that it accepts an array of grouped
+	       * elements and creates an array regrouping the elements to their pre-zip
+	       * configuration.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.2.0
+	       * @category Array
+	       * @param {Array} array The array of grouped elements to process.
+	       * @returns {Array} Returns the new array of regrouped elements.
+	       * @example
+	       *
+	       * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);
+	       * // => [['a', 1, true], ['b', 2, false]]
+	       *
+	       * _.unzip(zipped);
+	       * // => [['a', 'b'], [1, 2], [true, false]]
+	       */
 
 
-	function qkToXY(qk) {
-	  var x = 0;
-	  var y = 0;
-	  var scale = 256;
-	  for (var i = qk.length; i > 0; i--) {
-	    var key = qk[i-1];
-	    x += (+(key === '1' || key === '3')) * scale;
-	    y += (+(key === '2' || key === '3')) * scale;
-	    scale *= 2;
-	  }
-	  return [x, y];
-	}
+	      function unzip(array) {
+	        if (!(array && array.length)) {
+	          return [];
+	        }
 
+	        var length = 0;
+	        array = arrayFilter(array, function (group) {
+	          if (isArrayLikeObject(group)) {
+	            length = nativeMax(group.length, length);
+	            return true;
+	          }
+	        });
+	        return baseTimes(length, function (index) {
+	          return arrayMap(array, baseProperty(index));
+	        });
+	      }
+	      /**
+	       * This method is like `_.unzip` except that it accepts `iteratee` to specify
+	       * how regrouped values should be combined. The iteratee is invoked with the
+	       * elements of each group: (...group).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.8.0
+	       * @category Array
+	       * @param {Array} array The array of grouped elements to process.
+	       * @param {Function} [iteratee=_.identity] The function to combine
+	       *  regrouped values.
+	       * @returns {Array} Returns the new array of regrouped elements.
+	       * @example
+	       *
+	       * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
+	       * // => [[1, 10, 100], [2, 20, 200]]
+	       *
+	       * _.unzipWith(zipped, _.add);
+	       * // => [3, 30, 300]
+	       */
 
-	function getQuadKeys() {
-	  var dim = _resolution / 256;
-	  var quadKeys;
 
-	  if (dim === 16) {
-	    quadKeys = [
-	      '0000','0001','0010','0011','0100','0101','0110','0111',  '1000','1001','1010','1011','1100','1101','1110','1111',
-	      '0002','0003','0012','0013','0102','0103','0112','0113',  '1002','1003','1012','1013','1102','1103','1112','1113',
-	      '0020','0021','0030','0031','0120','0121','0130','0131',  '1020','1021','1030','1031','1120','1121','1130','1131',
-	      '0022','0023','0032','0033','0122','0123','0132','0133',  '1022','1023','1032','1033','1122','1123','1132','1133',
-	      '0200','0201','0210','0211','0300','0301','0310','0311',  '1200','1201','1210','1211','1300','1301','1310','1311',
-	      '0202','0203','0212','0213','0302','0303','0312','0313',  '1202','1203','1212','1213','1302','1303','1312','1313',
-	      '0220','0221','0230','0231','0320','0321','0330','0331',  '1220','1221','1230','1231','1320','1321','1330','1331',
-	      '0222','0223','0232','0233','0322','0323','0332','0333',  '1222','1223','1232','1233','1322','1323','1332','1333',
-
-	      '2000','2001','2010','2011','2100','2101','2110','2111',  '3000','3001','3010','3011','3100','3101','3110','3111',
-	      '2002','2003','2012','2013','2102','2103','2112','2113',  '3002','3003','3012','3013','3102','3103','3112','3113',
-	      '2020','2021','2030','2031','2120','2121','2130','2131',  '3020','3021','3030','3031','3120','3121','3130','3131',
-	      '2022','2023','2032','2033','2122','2123','2132','2133',  '3022','3023','3032','3033','3122','3123','3132','3133',
-	      '2200','2201','2210','2211','2300','2301','2310','2311',  '3200','3201','3210','3211','3300','3301','3310','3311',
-	      '2202','2203','2212','2213','2302','2303','2312','2313',  '3202','3203','3212','3213','3302','3303','3312','3313',
-	      '2220','2221','2230','2231','2320','2321','2330','2331',  '3220','3221','3230','3231','3320','3321','3330','3331',
-	      '2222','2223','2232','2233','2322','2323','2332','2333',  '3222','3223','3232','3233','3322','3323','3332','3333'
-	    ];
+	      function unzipWith(array, iteratee) {
+	        if (!(array && array.length)) {
+	          return [];
+	        }
 
-	  } else if (dim === 8) {
-	    quadKeys = [
-	      '000','001','010','011',  '100','101','110','111',
-	      '002','003','012','013',  '102','103','112','113',
-	      '020','021','030','031',  '120','121','130','131',
-	      '022','023','032','033',  '122','123','132','133',
-
-	      '200','201','210','211',  '300','301','310','311',
-	      '202','203','212','213',  '302','303','312','313',
-	      '220','221','230','231',  '320','321','330','331',
-	      '222','223','232','233',  '322','323','332','333'
-	    ];
+	        var result = unzip(array);
 
-	  } else if (dim === 4) {
-	    quadKeys = [
-	      '00','01',  '10','11',
-	      '02','03',  '12','13',
+	        if (iteratee == null) {
+	          return result;
+	        }
 
-	      '20','21',  '30','31',
-	      '22','23',  '32','33'
-	    ];
+	        return arrayMap(result, function (group) {
+	          return apply(iteratee, undefined$1, group);
+	        });
+	      }
+	      /**
+	       * Creates an array excluding all given values using
+	       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * for equality comparisons.
+	       *
+	       * **Note:** Unlike `_.pull`, this method returns a new array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {Array} array The array to inspect.
+	       * @param {...*} [values] The values to exclude.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @see _.difference, _.xor
+	       * @example
+	       *
+	       * _.without([2, 1, 2, 3], 1, 2);
+	       * // => [3]
+	       */
 
-	  } else {  // dim === 2
-	    quadKeys = [
-	      '0', '1',
-	      '2', '3'
-	    ];
-	  }
 
-	  return quadKeys;
-	}
+	      var without = baseRest(function (array, values) {
+	        return isArrayLikeObject(array) ? baseDifference(array, values) : [];
+	      });
+	      /**
+	       * Creates an array of unique values that is the
+	       * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
+	       * of the given arrays. The order of result values is determined by the order
+	       * they occur in the arrays.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.4.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @see _.difference, _.without
+	       * @example
+	       *
+	       * _.xor([2, 1], [2, 3]);
+	       * // => [1, 3]
+	       */
 
+	      var xor = baseRest(function (arrays) {
+	        return baseXor(arrayFilter(arrays, isArrayLikeObject));
+	      });
+	      /**
+	       * This method is like `_.xor` except that it accepts `iteratee` which is
+	       * invoked for each element of each `arrays` to generate the criterion by
+	       * which by which they're compared. The order of result values is determined
+	       * by the order they occur in the arrays. The iteratee is invoked with one
+	       * argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @example
+	       *
+	       * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+	       * // => [1.2, 3.4]
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+	       * // => [{ 'x': 2 }]
+	       */
 
+	      var xorBy = baseRest(function (arrays) {
+	        var iteratee = last(arrays);
 
-	var serviceStreetside = {
-	  /**
-	   * init() initialize streetside.
-	   */
-	  init: function() {
-	    if (!_ssCache) {
-	      this.reset();
-	    }
+	        if (isArrayLikeObject(iteratee)) {
+	          iteratee = undefined$1;
+	        }
 
-	    this.event = utilRebind(this, dispatch$7, 'on');
-	  },
+	        return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));
+	      });
+	      /**
+	       * This method is like `_.xor` except that it accepts `comparator` which is
+	       * invoked to compare elements of `arrays`. The order of result values is
+	       * determined by the order they occur in the arrays. The comparator is invoked
+	       * with two arguments: (arrVal, othVal).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to inspect.
+	       * @param {Function} [comparator] The comparator invoked per element.
+	       * @returns {Array} Returns the new array of filtered values.
+	       * @example
+	       *
+	       * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+	       * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+	       *
+	       * _.xorWith(objects, others, _.isEqual);
+	       * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
+	       */
 
-	  /**
-	   * reset() reset the cache.
-	   */
-	  reset: function() {
-	    if (_ssCache) {
-	      Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$6);
-	    }
+	      var xorWith = baseRest(function (arrays) {
+	        var comparator = last(arrays);
+	        comparator = typeof comparator == 'function' ? comparator : undefined$1;
+	        return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined$1, comparator);
+	      });
+	      /**
+	       * Creates an array of grouped elements, the first of which contains the
+	       * first elements of the given arrays, the second of which contains the
+	       * second elements of the given arrays, and so on.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to process.
+	       * @returns {Array} Returns the new array of grouped elements.
+	       * @example
+	       *
+	       * _.zip(['a', 'b'], [1, 2], [true, false]);
+	       * // => [['a', 1, true], ['b', 2, false]]
+	       */
 
-	    _ssCache = {
-	      bubbles: { inflight: {}, loaded: {}, nextPage: {}, rtree: new RBush(), points: {}, leaders: [] },
-	      sequences: {}
-	    };
-	  },
+	      var zip = baseRest(unzip);
+	      /**
+	       * This method is like `_.fromPairs` except that it accepts two arrays,
+	       * one of property identifiers and one of corresponding values.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.4.0
+	       * @category Array
+	       * @param {Array} [props=[]] The property identifiers.
+	       * @param {Array} [values=[]] The property values.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * _.zipObject(['a', 'b'], [1, 2]);
+	       * // => { 'a': 1, 'b': 2 }
+	       */
 
-	  /**
-	   * bubbles()
-	   */
-	  bubbles: function(projection) {
-	    var limit = 5;
-	    return searchLimited$2(limit, projection, _ssCache.bubbles.rtree);
-	  },
+	      function zipObject(props, values) {
+	        return baseZipObject(props || [], values || [], assignValue);
+	      }
+	      /**
+	       * This method is like `_.zipObject` except that it supports property paths.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.1.0
+	       * @category Array
+	       * @param {Array} [props=[]] The property identifiers.
+	       * @param {Array} [values=[]] The property values.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
+	       * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
+	       */
 
 
-	  sequences: function(projection) {
-	    var viewport = projection.clipExtent();
-	    var min = [viewport[0][0], viewport[1][1]];
-	    var max = [viewport[1][0], viewport[0][1]];
-	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-	    var seen = {};
-	    var results = [];
+	      function zipObjectDeep(props, values) {
+	        return baseZipObject(props || [], values || [], baseSet);
+	      }
+	      /**
+	       * This method is like `_.zip` except that it accepts `iteratee` to specify
+	       * how grouped values should be combined. The iteratee is invoked with the
+	       * elements of each group: (...group).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.8.0
+	       * @category Array
+	       * @param {...Array} [arrays] The arrays to process.
+	       * @param {Function} [iteratee=_.identity] The function to combine
+	       *  grouped values.
+	       * @returns {Array} Returns the new array of grouped elements.
+	       * @example
+	       *
+	       * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
+	       *   return a + b + c;
+	       * });
+	       * // => [111, 222]
+	       */
 
-	    // all sequences for bubbles in viewport
-	    _ssCache.bubbles.rtree.search(bbox)
-	      .forEach(function (d) {
-	        var key = d.data.sequenceKey;
-	        if (key && !seen[key]) {
-	            seen[key] = true;
-	            results.push(_ssCache.sequences[key].geojson);
-	        }
+
+	      var zipWith = baseRest(function (arrays) {
+	        var length = arrays.length,
+	            iteratee = length > 1 ? arrays[length - 1] : undefined$1;
+	        iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined$1;
+	        return unzipWith(arrays, iteratee);
 	      });
+	      /*------------------------------------------------------------------------*/
 
-	    return results;
-	  },
+	      /**
+	       * Creates a `lodash` wrapper instance that wraps `value` with explicit method
+	       * chain sequences enabled. The result of such sequences must be unwrapped
+	       * with `_#value`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.3.0
+	       * @category Seq
+	       * @param {*} value The value to wrap.
+	       * @returns {Object} Returns the new `lodash` wrapper instance.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'age': 36 },
+	       *   { 'user': 'fred',    'age': 40 },
+	       *   { 'user': 'pebbles', 'age': 1 }
+	       * ];
+	       *
+	       * var youngest = _
+	       *   .chain(users)
+	       *   .sortBy('age')
+	       *   .map(function(o) {
+	       *     return o.user + ' is ' + o.age;
+	       *   })
+	       *   .head()
+	       *   .value();
+	       * // => 'pebbles is 1'
+	       */
 
+	      function chain(value) {
+	        var result = lodash(value);
+	        result.__chain__ = true;
+	        return result;
+	      }
+	      /**
+	       * This method invokes `interceptor` and returns `value`. The interceptor
+	       * is invoked with one argument; (value). The purpose of this method is to
+	       * "tap into" a method chain sequence in order to modify intermediate results.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Seq
+	       * @param {*} value The value to provide to `interceptor`.
+	       * @param {Function} interceptor The function to invoke.
+	       * @returns {*} Returns `value`.
+	       * @example
+	       *
+	       * _([1, 2, 3])
+	       *  .tap(function(array) {
+	       *    // Mutate input array.
+	       *    array.pop();
+	       *  })
+	       *  .reverse()
+	       *  .value();
+	       * // => [2, 1]
+	       */
 
-	  /**
-	   * loadBubbles()
-	   */
-	  loadBubbles: function(projection, margin) {
-	    // by default: request 2 nearby tiles so we can connect sequences.
-	    if (margin === undefined) { margin = 2; }
 
-	    loadTiles$2('bubbles', bubbleApi, projection, margin);
-	  },
+	      function tap(value, interceptor) {
+	        interceptor(value);
+	        return value;
+	      }
+	      /**
+	       * This method is like `_.tap` except that it returns the result of `interceptor`.
+	       * The purpose of this method is to "pass thru" values replacing intermediate
+	       * results in a method chain sequence.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Seq
+	       * @param {*} value The value to provide to `interceptor`.
+	       * @param {Function} interceptor The function to invoke.
+	       * @returns {*} Returns the result of `interceptor`.
+	       * @example
+	       *
+	       * _('  abc  ')
+	       *  .chain()
+	       *  .trim()
+	       *  .thru(function(value) {
+	       *    return [value];
+	       *  })
+	       *  .value();
+	       * // => ['abc']
+	       */
 
 
-	  viewer: function() {
-	    return _pannellumViewer;
-	  },
+	      function thru(value, interceptor) {
+	        return interceptor(value);
+	      }
+	      /**
+	       * This method is the wrapper version of `_.at`.
+	       *
+	       * @name at
+	       * @memberOf _
+	       * @since 1.0.0
+	       * @category Seq
+	       * @param {...(string|string[])} [paths] The property paths to pick.
+	       * @returns {Object} Returns the new `lodash` wrapper instance.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
+	       *
+	       * _(object).at(['a[0].b.c', 'a[1]']).value();
+	       * // => [3, 4]
+	       */
 
 
-	  initViewer: function () {
-	    if (!window.pannellum) { return; }
-	    if (_pannellumViewer) { return; }
+	      var wrapperAt = flatRest(function (paths) {
+	        var length = paths.length,
+	            start = length ? paths[0] : 0,
+	            value = this.__wrapped__,
+	            interceptor = function interceptor(object) {
+	          return baseAt(object, paths);
+	        };
 
-	    var sceneID = ++_currScene + '';
-	    var options = {
-	      'default': { firstScene: sceneID },
-	      scenes: {}
-	    };
-	    options.scenes[sceneID] = _sceneOptions;
+	        if (length > 1 || this.__actions__.length || !(value instanceof LazyWrapper) || !isIndex(start)) {
+	          return this.thru(interceptor);
+	        }
 
-	    _pannellumViewer = window.pannellum.viewer('ideditor-viewer-streetside', options);
-	  },
+	        value = value.slice(start, +start + (length ? 1 : 0));
 
+	        value.__actions__.push({
+	          'func': thru,
+	          'args': [interceptor],
+	          'thisArg': undefined$1
+	        });
 
-	  /**
-	   * loadViewer() create the streeside viewer.
-	   */
-	  loadViewer: function(context) {
-	    var that = this;
+	        return new LodashWrapper(value, this.__chain__).thru(function (array) {
+	          if (length && !array.length) {
+	            array.push(undefined$1);
+	          }
 
-	    var pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	          return array;
+	        });
+	      });
+	      /**
+	       * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
+	       *
+	       * @name chain
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Seq
+	       * @returns {Object} Returns the new `lodash` wrapper instance.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney', 'age': 36 },
+	       *   { 'user': 'fred',   'age': 40 }
+	       * ];
+	       *
+	       * // A sequence without explicit chaining.
+	       * _(users).head();
+	       * // => { 'user': 'barney', 'age': 36 }
+	       *
+	       * // A sequence with explicit chaining.
+	       * _(users)
+	       *   .chain()
+	       *   .head()
+	       *   .pick('user')
+	       *   .value();
+	       * // => { 'user': 'barney' }
+	       */
 
-	    // create ms-wrapper, a photo wrapper class
-	    var wrap = context.container().select('.photoviewer').selectAll('.ms-wrapper')
-	      .data([0]);
+	      function wrapperChain() {
+	        return chain(this);
+	      }
+	      /**
+	       * Executes the chain sequence and returns the wrapped result.
+	       *
+	       * @name commit
+	       * @memberOf _
+	       * @since 3.2.0
+	       * @category Seq
+	       * @returns {Object} Returns the new `lodash` wrapper instance.
+	       * @example
+	       *
+	       * var array = [1, 2];
+	       * var wrapped = _(array).push(3);
+	       *
+	       * console.log(array);
+	       * // => [1, 2]
+	       *
+	       * wrapped = wrapped.commit();
+	       * console.log(array);
+	       * // => [1, 2, 3]
+	       *
+	       * wrapped.last();
+	       * // => 3
+	       *
+	       * console.log(array);
+	       * // => [1, 2, 3]
+	       */
 
-	    // inject ms-wrapper into the photoviewer div
-	    // (used by all to house each custom photo viewer)
-	    var wrapEnter = wrap.enter()
-	      .append('div')
-	      .attr('class', 'photo-wrapper ms-wrapper')
-	      .classed('hide', true);
-
-	    // inject div to support streetside viewer (pannellum) and attribution line
-	    wrapEnter
-	      .append('div')
-	      .attr('id', 'ideditor-viewer-streetside')
-	      .on(pointerPrefix + 'down.streetside', function () {
-	        select(window)
-	          .on(pointerPrefix + 'move.streetside', function () {
-	            dispatch$7.call('viewerChanged');
-	          }, true);
-	      })
-	      .on(pointerPrefix + 'up.streetside pointercancel.streetside', function () {
-	        select(window)
-	          .on(pointerPrefix + 'move.streetside', null);
 
-	        // continue dispatching events for a few seconds, in case viewer has inertia.
-	        var t = timer(function (elapsed) {
-	          dispatch$7.call('viewerChanged');
-	          if (elapsed > 2000) {
-	            t.stop();
-	          }
-	        });
-	      })
-	      .append('div')
-	      .attr('class', 'photo-attribution fillD');
-
-	    var controlsEnter = wrapEnter
-	      .append('div')
-	      .attr('class', 'photo-controls-wrap')
-	      .append('div')
-	      .attr('class', 'photo-controls');
-
-	    controlsEnter
-	      .append('button')
-	      .on('click.back', step(-1))
-	      .text('◄');
-
-	    controlsEnter
-	      .append('button')
-	      .on('click.forward', step(1))
-	      .text('►');
-
-
-	    // create working canvas for stitching together images
-	    wrap = wrap
-	      .merge(wrapEnter)
-	      .call(setupCanvas, true);
-
-	    // load streetside pannellum viewer css
-	    select('head').selectAll('#ideditor-streetside-viewercss')
-	      .data([0])
-	      .enter()
-	      .append('link')
-	      .attr('id', 'ideditor-streetside-viewercss')
-	      .attr('rel', 'stylesheet')
-	      .attr('href', context.asset(pannellumViewerCSS));
-
-	    // load streetside pannellum viewer js
-	    select('head').selectAll('#ideditor-streetside-viewerjs')
-	      .data([0])
-	      .enter()
-	      .append('script')
-	      .attr('id', 'ideditor-streetside-viewerjs')
-	      .attr('src', context.asset(pannellumViewerJS));
-
-
-	    // Register viewer resize handler
-	    context.ui().photoviewer.on('resize.streetside', function () {
-	      if (_pannellumViewer) {
-	        _pannellumViewer.resize();
+	      function wrapperCommit() {
+	        return new LodashWrapper(this.value(), this.__chain__);
 	      }
-	    });
+	      /**
+	       * Gets the next value on a wrapped object following the
+	       * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
+	       *
+	       * @name next
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Seq
+	       * @returns {Object} Returns the next iterator value.
+	       * @example
+	       *
+	       * var wrapped = _([1, 2]);
+	       *
+	       * wrapped.next();
+	       * // => { 'done': false, 'value': 1 }
+	       *
+	       * wrapped.next();
+	       * // => { 'done': false, 'value': 2 }
+	       *
+	       * wrapped.next();
+	       * // => { 'done': true, 'value': undefined }
+	       */
 
 
-	    function step(stepBy) {
-	      return function () {
-	        var viewer = context.container().select('.photoviewer');
-	        var selected = viewer.empty() ? undefined : viewer.datum();
-	        if (!selected) { return; }
+	      function wrapperNext() {
+	        if (this.__values__ === undefined$1) {
+	          this.__values__ = toArray(this.value());
+	        }
 
-	        var nextID = (stepBy === 1 ? selected.ne : selected.pr);
-	        var yaw = _pannellumViewer.getYaw();
-	        var ca = selected.ca + yaw;
-	        var origin = selected.loc;
+	        var done = this.__index__ >= this.__values__.length,
+	            value = done ? undefined$1 : this.__values__[this.__index__++];
+	        return {
+	          'done': done,
+	          'value': value
+	        };
+	      }
+	      /**
+	       * Enables the wrapper to be iterable.
+	       *
+	       * @name Symbol.iterator
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Seq
+	       * @returns {Object} Returns the wrapper object.
+	       * @example
+	       *
+	       * var wrapped = _([1, 2]);
+	       *
+	       * wrapped[Symbol.iterator]() === wrapped;
+	       * // => true
+	       *
+	       * Array.from(wrapped);
+	       * // => [1, 2]
+	       */
 
-	        // construct a search trapezoid pointing out from current bubble
-	        var meters = 35;
-	        var p1 = [
-	          origin[0] + geoMetersToLon(meters / 5, origin[1]),
-	          origin[1]
-	        ];
-	        var p2 = [
-	          origin[0] + geoMetersToLon(meters / 2, origin[1]),
-	          origin[1] + geoMetersToLat(meters)
-	        ];
-	        var p3 = [
-	          origin[0] - geoMetersToLon(meters / 2, origin[1]),
-	          origin[1] + geoMetersToLat(meters)
-	        ];
-	        var p4 = [
-	          origin[0] - geoMetersToLon(meters / 5, origin[1]),
-	          origin[1]
-	        ];
 
-	        var poly = [p1, p2, p3, p4, p1];
+	      function wrapperToIterator() {
+	        return this;
+	      }
+	      /**
+	       * Creates a clone of the chain sequence planting `value` as the wrapped value.
+	       *
+	       * @name plant
+	       * @memberOf _
+	       * @since 3.2.0
+	       * @category Seq
+	       * @param {*} value The value to plant.
+	       * @returns {Object} Returns the new `lodash` wrapper instance.
+	       * @example
+	       *
+	       * function square(n) {
+	       *   return n * n;
+	       * }
+	       *
+	       * var wrapped = _([1, 2]).map(square);
+	       * var other = wrapped.plant([3, 4]);
+	       *
+	       * other.value();
+	       * // => [9, 16]
+	       *
+	       * wrapped.value();
+	       * // => [1, 4]
+	       */
+
 
-	        // rotate it to face forward/backward
-	        var angle = (stepBy === 1 ? ca : ca + 180) * (Math.PI / 180);
-	        poly = geoRotate(poly, -angle, origin);
+	      function wrapperPlant(value) {
+	        var result,
+	            parent = this;
 
-	        var extent = poly.reduce(function (extent, point) {
-	          return extent.extend(geoExtent(point));
-	        }, geoExtent());
+	        while (parent instanceof baseLodash) {
+	          var clone = wrapperClone(parent);
+	          clone.__index__ = 0;
+	          clone.__values__ = undefined$1;
 
-	        // find nearest other bubble in the search polygon
-	        var minDist = Infinity;
-	        _ssCache.bubbles.rtree.search(extent.bbox())
-	          .forEach(function (d) {
-	            if (d.data.key === selected.key) { return; }
-	            if (!geoPointInPolygon(d.data.loc, poly)) { return; }
-
-	            var dist = geoVecLength(d.data.loc, selected.loc);
-	            var theta = selected.ca - d.data.ca;
-	            var minTheta = Math.min(Math.abs(theta), 360 - Math.abs(theta));
-	            if (minTheta > 20) {
-	              dist += 5;  // penalize distance if camera angles don't match
-	            }
+	          if (result) {
+	            previous.__wrapped__ = clone;
+	          } else {
+	            result = clone;
+	          }
 
-	            if (dist < minDist) {
-	              nextID = d.data.key;
-	              minDist = dist;
-	            }
-	          });
+	          var previous = clone;
+	          parent = parent.__wrapped__;
+	        }
 
-	        var nextBubble = nextID && _ssCache.bubbles.points[nextID];
-	        if (!nextBubble) { return; }
+	        previous.__wrapped__ = value;
+	        return result;
+	      }
+	      /**
+	       * This method is the wrapper version of `_.reverse`.
+	       *
+	       * **Note:** This method mutates the wrapped array.
+	       *
+	       * @name reverse
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Seq
+	       * @returns {Object} Returns the new `lodash` wrapper instance.
+	       * @example
+	       *
+	       * var array = [1, 2, 3];
+	       *
+	       * _(array).reverse().value()
+	       * // => [3, 2, 1]
+	       *
+	       * console.log(array);
+	       * // => [3, 2, 1]
+	       */
 
-	        context.map().centerEase(nextBubble.loc);
 
-	        that.selectImage(context, nextBubble)
-	          .then(function (response) {
-	            if (response.status === 'ok') {
-	              _sceneOptions.yaw = yaw;
-	              that.showViewer(context);
-	            }
-	          });
-	      };
-	    }
-	  },
+	      function wrapperReverse() {
+	        var value = this.__wrapped__;
 
+	        if (value instanceof LazyWrapper) {
+	          var wrapped = value;
 
-	  /**
-	   * showViewer()
-	   */
-	  showViewer: function(context, yaw) {
-	    if (!_sceneOptions) { return; }
+	          if (this.__actions__.length) {
+	            wrapped = new LazyWrapper(this);
+	          }
 
-	    if (yaw !== undefined) {
-	      _sceneOptions.yaw = yaw;
-	    }
+	          wrapped = wrapped.reverse();
 
-	    if (!_pannellumViewer) {
-	      this.initViewer();
-	    } else {
-	      // make a new scene
-	      var sceneID = ++_currScene + '';
-	      _pannellumViewer
-	        .addScene(sceneID, _sceneOptions)
-	        .loadScene(sceneID);
+	          wrapped.__actions__.push({
+	            'func': thru,
+	            'args': [reverse],
+	            'thisArg': undefined$1
+	          });
 
-	      // remove previous scene
-	      if (_currScene > 2) {
-	        sceneID = (_currScene - 1) + '';
-	        _pannellumViewer
-	          .removeScene(sceneID);
+	          return new LodashWrapper(wrapped, this.__chain__);
+	        }
+
+	        return this.thru(reverse);
 	      }
-	    }
+	      /**
+	       * Executes the chain sequence to resolve the unwrapped value.
+	       *
+	       * @name value
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @alias toJSON, valueOf
+	       * @category Seq
+	       * @returns {*} Returns the resolved unwrapped value.
+	       * @example
+	       *
+	       * _([1, 2, 3]).value();
+	       * // => [1, 2, 3]
+	       */
 
-	    var wrap = context.container().select('.photoviewer')
-	      .classed('hide', false);
 
-	    var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();
+	      function wrapperValue() {
+	        return baseWrapperValue(this.__wrapped__, this.__actions__);
+	      }
+	      /*------------------------------------------------------------------------*/
 
-	    if (isHidden) {
-	      wrap
-	        .selectAll('.photo-wrapper:not(.ms-wrapper)')
-	        .classed('hide', true);
+	      /**
+	       * Creates an object composed of keys generated from the results of running
+	       * each element of `collection` thru `iteratee`. The corresponding value of
+	       * each key is the number of times the key was returned by `iteratee`. The
+	       * iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.5.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
+	       * @returns {Object} Returns the composed aggregate object.
+	       * @example
+	       *
+	       * _.countBy([6.1, 4.2, 6.3], Math.floor);
+	       * // => { '4': 1, '6': 2 }
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.countBy(['one', 'two', 'three'], 'length');
+	       * // => { '3': 2, '5': 1 }
+	       */
 
-	      wrap
-	        .selectAll('.photo-wrapper.ms-wrapper')
-	        .classed('hide', false);
-	    }
 
-	    return this;
-	  },
+	      var countBy = createAggregator(function (result, value, key) {
+	        if (hasOwnProperty.call(result, key)) {
+	          ++result[key];
+	        } else {
+	          baseAssignValue(result, key, 1);
+	        }
+	      });
+	      /**
+	       * Checks if `predicate` returns truthy for **all** elements of `collection`.
+	       * Iteration is stopped once `predicate` returns falsey. The predicate is
+	       * invoked with three arguments: (value, index|key, collection).
+	       *
+	       * **Note:** This method returns `true` for
+	       * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
+	       * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
+	       * elements of empty collections.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {boolean} Returns `true` if all elements pass the predicate check,
+	       *  else `false`.
+	       * @example
+	       *
+	       * _.every([true, 1, null, 'yes'], Boolean);
+	       * // => false
+	       *
+	       * var users = [
+	       *   { 'user': 'barney', 'age': 36, 'active': false },
+	       *   { 'user': 'fred',   'age': 40, 'active': false }
+	       * ];
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.every(users, { 'user': 'barney', 'active': false });
+	       * // => false
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.every(users, ['active', false]);
+	       * // => true
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.every(users, 'active');
+	       * // => false
+	       */
 
+	      function every(collection, predicate, guard) {
+	        var func = isArray(collection) ? arrayEvery : baseEvery;
 
-	  /**
-	   * hideViewer()
-	   */
-	  hideViewer: function (context) {
-	    var viewer = context.container().select('.photoviewer');
-	    if (!viewer.empty()) { viewer.datum(null); }
+	        if (guard && isIterateeCall(collection, predicate, guard)) {
+	          predicate = undefined$1;
+	        }
 
-	    viewer
-	      .classed('hide', true)
-	      .selectAll('.photo-wrapper')
-	      .classed('hide', true);
+	        return func(collection, getIteratee(predicate, 3));
+	      }
+	      /**
+	       * Iterates over elements of `collection`, returning an array of all elements
+	       * `predicate` returns truthy for. The predicate is invoked with three
+	       * arguments: (value, index|key, collection).
+	       *
+	       * **Note:** Unlike `_.remove`, this method returns a new array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the new filtered array.
+	       * @see _.reject
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney', 'age': 36, 'active': true },
+	       *   { 'user': 'fred',   'age': 40, 'active': false }
+	       * ];
+	       *
+	       * _.filter(users, function(o) { return !o.active; });
+	       * // => objects for ['fred']
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.filter(users, { 'age': 36, 'active': true });
+	       * // => objects for ['barney']
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.filter(users, ['active', false]);
+	       * // => objects for ['fred']
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.filter(users, 'active');
+	       * // => objects for ['barney']
+	       *
+	       * // Combining several predicates using `_.overEvery` or `_.overSome`.
+	       * _.filter(users, _.overSome([{ 'age': 36 }, ['age', 40]]));
+	       * // => objects for ['fred', 'barney']
+	       */
 
-	    context.container().selectAll('.viewfield-group, .sequence, .icon-sign')
-	      .classed('currentView', false);
 
-	    return this.setStyles(context, null, true);
-	  },
+	      function filter(collection, predicate) {
+	        var func = isArray(collection) ? arrayFilter : baseFilter;
+	        return func(collection, getIteratee(predicate, 3));
+	      }
+	      /**
+	       * Iterates over elements of `collection`, returning the first element
+	       * `predicate` returns truthy for. The predicate is invoked with three
+	       * arguments: (value, index|key, collection).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to inspect.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @param {number} [fromIndex=0] The index to search from.
+	       * @returns {*} Returns the matched element, else `undefined`.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'age': 36, 'active': true },
+	       *   { 'user': 'fred',    'age': 40, 'active': false },
+	       *   { 'user': 'pebbles', 'age': 1,  'active': true }
+	       * ];
+	       *
+	       * _.find(users, function(o) { return o.age < 40; });
+	       * // => object for 'barney'
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.find(users, { 'age': 1, 'active': true });
+	       * // => object for 'pebbles'
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.find(users, ['active', false]);
+	       * // => object for 'fred'
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.find(users, 'active');
+	       * // => object for 'barney'
+	       */
 
 
-	  /**
-	   * selectImage().
-	   */
-	  selectImage: function (context, d) {
-	    var that = this;
-	    var viewer = context.container().select('.photoviewer');
-	    if (!viewer.empty()) { viewer.datum(d); }
+	      var find = createFind(findIndex);
+	      /**
+	       * This method is like `_.find` except that it iterates over elements of
+	       * `collection` from right to left.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to inspect.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @param {number} [fromIndex=collection.length-1] The index to search from.
+	       * @returns {*} Returns the matched element, else `undefined`.
+	       * @example
+	       *
+	       * _.findLast([1, 2, 3, 4], function(n) {
+	       *   return n % 2 == 1;
+	       * });
+	       * // => 3
+	       */
 
-	    this.setStyles(context, null, true);
+	      var findLast = createFind(findLastIndex);
+	      /**
+	       * Creates a flattened array of values by running each element in `collection`
+	       * thru `iteratee` and flattening the mapped results. The iteratee is invoked
+	       * with three arguments: (value, index|key, collection).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the new flattened array.
+	       * @example
+	       *
+	       * function duplicate(n) {
+	       *   return [n, n];
+	       * }
+	       *
+	       * _.flatMap([1, 2], duplicate);
+	       * // => [1, 1, 2, 2]
+	       */
 
-	    var wrap = context.container().select('.photoviewer .ms-wrapper');
-	    var attribution = wrap.selectAll('.photo-attribution').html('');
+	      function flatMap(collection, iteratee) {
+	        return baseFlatten(map(collection, iteratee), 1);
+	      }
+	      /**
+	       * This method is like `_.flatMap` except that it recursively flattens the
+	       * mapped results.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.7.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the new flattened array.
+	       * @example
+	       *
+	       * function duplicate(n) {
+	       *   return [[[n, n]]];
+	       * }
+	       *
+	       * _.flatMapDeep([1, 2], duplicate);
+	       * // => [1, 1, 2, 2]
+	       */
 
-	    wrap.selectAll('.pnlm-load-box')   // display "loading.."
-	      .style('display', 'block');
 
-	    if (!d) {
-	      return Promise.resolve({ status: 'ok' });
-	    }
+	      function flatMapDeep(collection, iteratee) {
+	        return baseFlatten(map(collection, iteratee), INFINITY);
+	      }
+	      /**
+	       * This method is like `_.flatMap` except that it recursively flattens the
+	       * mapped results up to `depth` times.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.7.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @param {number} [depth=1] The maximum recursion depth.
+	       * @returns {Array} Returns the new flattened array.
+	       * @example
+	       *
+	       * function duplicate(n) {
+	       *   return [[[n, n]]];
+	       * }
+	       *
+	       * _.flatMapDepth([1, 2], duplicate, 2);
+	       * // => [[1, 1], [2, 2]]
+	       */
 
-	    var line1 = attribution
-	      .append('div')
-	      .attr('class', 'attribution-row');
 
-	    var hiresDomId = utilUniqueDomId('streetside-hires');
+	      function flatMapDepth(collection, iteratee, depth) {
+	        depth = depth === undefined$1 ? 1 : toInteger(depth);
+	        return baseFlatten(map(collection, iteratee), depth);
+	      }
+	      /**
+	       * Iterates over elements of `collection` and invokes `iteratee` for each element.
+	       * The iteratee is invoked with three arguments: (value, index|key, collection).
+	       * Iteratee functions may exit iteration early by explicitly returning `false`.
+	       *
+	       * **Note:** As with other "Collections" methods, objects with a "length"
+	       * property are iterated like arrays. To avoid this behavior use `_.forIn`
+	       * or `_.forOwn` for object iteration.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @alias each
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Array|Object} Returns `collection`.
+	       * @see _.forEachRight
+	       * @example
+	       *
+	       * _.forEach([1, 2], function(value) {
+	       *   console.log(value);
+	       * });
+	       * // => Logs `1` then `2`.
+	       *
+	       * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
+	       *   console.log(key);
+	       * });
+	       * // => Logs 'a' then 'b' (iteration order is not guaranteed).
+	       */
+
 
-	    // Add hires checkbox
-	    var label = line1
-	      .append('label')
-	      .attr('for', hiresDomId)
-	      .attr('class', 'streetside-hires');
+	      function forEach(collection, iteratee) {
+	        var func = isArray(collection) ? arrayEach : baseEach;
+	        return func(collection, getIteratee(iteratee, 3));
+	      }
+	      /**
+	       * This method is like `_.forEach` except that it iterates over elements of
+	       * `collection` from right to left.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @alias eachRight
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Array|Object} Returns `collection`.
+	       * @see _.forEach
+	       * @example
+	       *
+	       * _.forEachRight([1, 2], function(value) {
+	       *   console.log(value);
+	       * });
+	       * // => Logs `2` then `1`.
+	       */
 
-	    label
-	      .append('input')
-	      .attr('type', 'checkbox')
-	      .attr('id', hiresDomId)
-	      .property('checked', _hires)
-	      .on('click', function () {
-	        event.stopPropagation();
 
-	        _hires = !_hires;
-	        _resolution = _hires ? 1024 : 512;
-	        wrap.call(setupCanvas, true);
+	      function forEachRight(collection, iteratee) {
+	        var func = isArray(collection) ? arrayEachRight : baseEachRight;
+	        return func(collection, getIteratee(iteratee, 3));
+	      }
+	      /**
+	       * Creates an object composed of keys generated from the results of running
+	       * each element of `collection` thru `iteratee`. The order of grouped values
+	       * is determined by the order they occur in `collection`. The corresponding
+	       * value of each key is an array of elements responsible for generating the
+	       * key. The iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
+	       * @returns {Object} Returns the composed aggregate object.
+	       * @example
+	       *
+	       * _.groupBy([6.1, 4.2, 6.3], Math.floor);
+	       * // => { '4': [4.2], '6': [6.1, 6.3] }
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.groupBy(['one', 'two', 'three'], 'length');
+	       * // => { '3': ['one', 'two'], '5': ['three'] }
+	       */
 
-	        var viewstate = {
-	          yaw: _pannellumViewer.getYaw(),
-	          pitch: _pannellumViewer.getPitch(),
-	          hfov: _pannellumViewer.getHfov()
-	        };
 
-	        that.selectImage(context, d)
-	          .then(function (response) {
-	            if (response.status === 'ok') {
-	              _sceneOptions = Object.assign(_sceneOptions, viewstate);
-	              that.showViewer(context);
-	            }
-	          });
+	      var groupBy = createAggregator(function (result, value, key) {
+	        if (hasOwnProperty.call(result, key)) {
+	          result[key].push(value);
+	        } else {
+	          baseAssignValue(result, key, [value]);
+	        }
 	      });
+	      /**
+	       * Checks if `value` is in `collection`. If `collection` is a string, it's
+	       * checked for a substring of `value`, otherwise
+	       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * is used for equality comparisons. If `fromIndex` is negative, it's used as
+	       * the offset from the end of `collection`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object|string} collection The collection to inspect.
+	       * @param {*} value The value to search for.
+	       * @param {number} [fromIndex=0] The index to search from.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
+	       * @returns {boolean} Returns `true` if `value` is found, else `false`.
+	       * @example
+	       *
+	       * _.includes([1, 2, 3], 1);
+	       * // => true
+	       *
+	       * _.includes([1, 2, 3], 1, 2);
+	       * // => false
+	       *
+	       * _.includes({ 'a': 1, 'b': 2 }, 1);
+	       * // => true
+	       *
+	       * _.includes('abcd', 'bc');
+	       * // => true
+	       */
 
-	    label
-	      .append('span')
-	      .text(_t('streetside.hires'));
+	      function includes(collection, value, fromIndex, guard) {
+	        collection = isArrayLike(collection) ? collection : values(collection);
+	        fromIndex = fromIndex && !guard ? toInteger(fromIndex) : 0;
+	        var length = collection.length;
 
+	        if (fromIndex < 0) {
+	          fromIndex = nativeMax(length + fromIndex, 0);
+	        }
 
-	    var captureInfo = line1
-	      .append('div')
-	      .attr('class', 'attribution-capture-info');
+	        return isString(collection) ? fromIndex <= length && collection.indexOf(value, fromIndex) > -1 : !!length && baseIndexOf(collection, value, fromIndex) > -1;
+	      }
+	      /**
+	       * Invokes the method at `path` of each element in `collection`, returning
+	       * an array of the results of each invoked method. Any additional arguments
+	       * are provided to each invoked method. If `path` is a function, it's invoked
+	       * for, and `this` bound to, each element in `collection`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Array|Function|string} path The path of the method to invoke or
+	       *  the function invoked per iteration.
+	       * @param {...*} [args] The arguments to invoke each method with.
+	       * @returns {Array} Returns the array of results.
+	       * @example
+	       *
+	       * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
+	       * // => [[1, 5, 7], [1, 2, 3]]
+	       *
+	       * _.invokeMap([123, 456], String.prototype.split, '');
+	       * // => [['1', '2', '3'], ['4', '5', '6']]
+	       */
 
-	    // Add capture date
-	    if (d.captured_by) {
-	      var yyyy = (new Date()).getFullYear();
 
-	      captureInfo
-	        .append('a')
-	        .attr('class', 'captured_by')
-	        .attr('target', '_blank')
-	        .attr('href', 'https://www.microsoft.com/en-us/maps/streetside')
-	        .text('©' + yyyy + ' Microsoft');
+	      var invokeMap = baseRest(function (collection, path, args) {
+	        var index = -1,
+	            isFunc = typeof path == 'function',
+	            result = isArrayLike(collection) ? Array(collection.length) : [];
+	        baseEach(collection, function (value) {
+	          result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args);
+	        });
+	        return result;
+	      });
+	      /**
+	       * Creates an object composed of keys generated from the results of running
+	       * each element of `collection` thru `iteratee`. The corresponding value of
+	       * each key is the last element responsible for generating the key. The
+	       * iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
+	       * @returns {Object} Returns the composed aggregate object.
+	       * @example
+	       *
+	       * var array = [
+	       *   { 'dir': 'left', 'code': 97 },
+	       *   { 'dir': 'right', 'code': 100 }
+	       * ];
+	       *
+	       * _.keyBy(array, function(o) {
+	       *   return String.fromCharCode(o.code);
+	       * });
+	       * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
+	       *
+	       * _.keyBy(array, 'dir');
+	       * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
+	       */
 
-	      captureInfo
-	        .append('span')
-	        .text('|');
-	    }
+	      var keyBy = createAggregator(function (result, value, key) {
+	        baseAssignValue(result, key, value);
+	      });
+	      /**
+	       * Creates an array of values by running each element in `collection` thru
+	       * `iteratee`. The iteratee is invoked with three arguments:
+	       * (value, index|key, collection).
+	       *
+	       * Many lodash methods are guarded to work as iteratees for methods like
+	       * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
+	       *
+	       * The guarded methods are:
+	       * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
+	       * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
+	       * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
+	       * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the new mapped array.
+	       * @example
+	       *
+	       * function square(n) {
+	       *   return n * n;
+	       * }
+	       *
+	       * _.map([4, 8], square);
+	       * // => [16, 64]
+	       *
+	       * _.map({ 'a': 4, 'b': 8 }, square);
+	       * // => [16, 64] (iteration order is not guaranteed)
+	       *
+	       * var users = [
+	       *   { 'user': 'barney' },
+	       *   { 'user': 'fred' }
+	       * ];
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.map(users, 'user');
+	       * // => ['barney', 'fred']
+	       */
 
-	    if (d.captured_at) {
-	      captureInfo
-	        .append('span')
-	        .attr('class', 'captured_at')
-	        .text(localeTimestamp(d.captured_at));
-	    }
+	      function map(collection, iteratee) {
+	        var func = isArray(collection) ? arrayMap : baseMap;
+	        return func(collection, getIteratee(iteratee, 3));
+	      }
+	      /**
+	       * This method is like `_.sortBy` except that it allows specifying the sort
+	       * orders of the iteratees to sort by. If `orders` is unspecified, all values
+	       * are sorted in ascending order. Otherwise, specify an order of "desc" for
+	       * descending or "asc" for ascending sort order of corresponding values.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]
+	       *  The iteratees to sort by.
+	       * @param {string[]} [orders] The sort orders of `iteratees`.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
+	       * @returns {Array} Returns the new sorted array.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'fred',   'age': 48 },
+	       *   { 'user': 'barney', 'age': 34 },
+	       *   { 'user': 'fred',   'age': 40 },
+	       *   { 'user': 'barney', 'age': 36 }
+	       * ];
+	       *
+	       * // Sort by `user` in ascending order and by `age` in descending order.
+	       * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
+	       * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
+	       */
 
-	    // Add image links
-	    var line2 = attribution
-	      .append('div')
-	      .attr('class', 'attribution-row');
 
-	    line2
-	      .append('a')
-	      .attr('class', 'image-view-link')
-	      .attr('target', '_blank')
-	      .attr('href', 'https://www.bing.com/maps?cp=' + d.loc[1] + '~' + d.loc[0] +
-	        '&lvl=17&dir=' + d.ca + '&style=x&v=2&sV=1')
-	      .text(_t('streetside.view_on_bing'));
+	      function orderBy(collection, iteratees, orders, guard) {
+	        if (collection == null) {
+	          return [];
+	        }
 
-	    line2
-	      .append('a')
-	      .attr('class', 'image-report-link')
-	      .attr('target', '_blank')
-	      .attr('href', 'https://www.bing.com/maps/privacyreport/streetsideprivacyreport?bubbleid=' +
-	        encodeURIComponent(d.key) + '&focus=photo&lat=' + d.loc[1] + '&lng=' + d.loc[0] + '&z=17')
-	      .text(_t('streetside.report'));
+	        if (!isArray(iteratees)) {
+	          iteratees = iteratees == null ? [] : [iteratees];
+	        }
 
+	        orders = guard ? undefined$1 : orders;
 
-	    var bubbleIdQuadKey = d.key.toString(4);
-	    var paddingNeeded = 16 - bubbleIdQuadKey.length;
-	    for (var i = 0; i < paddingNeeded; i++) {
-	      bubbleIdQuadKey = '0' + bubbleIdQuadKey;
-	    }
-	    var imgUrlPrefix = streetsideImagesApi + 'hs' + bubbleIdQuadKey;
-	    var imgUrlSuffix = '.jpg?g=6338&n=z';
+	        if (!isArray(orders)) {
+	          orders = orders == null ? [] : [orders];
+	        }
 
-	    // Cubemap face code order matters here: front=01, right=02, back=03, left=10, up=11, down=12
-	    var faceKeys = ['01','02','03','10','11','12'];
+	        return baseOrderBy(collection, iteratees, orders);
+	      }
+	      /**
+	       * Creates an array of elements split into two groups, the first of which
+	       * contains elements `predicate` returns truthy for, the second of which
+	       * contains elements `predicate` returns falsey for. The predicate is
+	       * invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the array of grouped elements.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney',  'age': 36, 'active': false },
+	       *   { 'user': 'fred',    'age': 40, 'active': true },
+	       *   { 'user': 'pebbles', 'age': 1,  'active': false }
+	       * ];
+	       *
+	       * _.partition(users, function(o) { return o.active; });
+	       * // => objects for [['fred'], ['barney', 'pebbles']]
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.partition(users, { 'age': 1, 'active': false });
+	       * // => objects for [['pebbles'], ['barney', 'fred']]
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.partition(users, ['active', false]);
+	       * // => objects for [['barney', 'pebbles'], ['fred']]
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.partition(users, 'active');
+	       * // => objects for [['fred'], ['barney', 'pebbles']]
+	       */
 
-	    // Map images to cube faces
-	    var quadKeys = getQuadKeys();
-	    var faces = faceKeys.map(function (faceKey) {
-	      return quadKeys.map(function (quadKey) {
-	        var xy = qkToXY(quadKey);
-	        return {
-	          face: faceKey,
-	          url: imgUrlPrefix + faceKey + quadKey + imgUrlSuffix,
-	          x: xy[0],
-	          y: xy[1]
-	        };
+
+	      var partition = createAggregator(function (result, value, key) {
+	        result[key ? 0 : 1].push(value);
+	      }, function () {
+	        return [[], []];
 	      });
-	    });
+	      /**
+	       * Reduces `collection` to a value which is the accumulated result of running
+	       * each element in `collection` thru `iteratee`, where each successive
+	       * invocation is supplied the return value of the previous. If `accumulator`
+	       * is not given, the first element of `collection` is used as the initial
+	       * value. The iteratee is invoked with four arguments:
+	       * (accumulator, value, index|key, collection).
+	       *
+	       * Many lodash methods are guarded to work as iteratees for methods like
+	       * `_.reduce`, `_.reduceRight`, and `_.transform`.
+	       *
+	       * The guarded methods are:
+	       * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
+	       * and `sortBy`
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @param {*} [accumulator] The initial value.
+	       * @returns {*} Returns the accumulated value.
+	       * @see _.reduceRight
+	       * @example
+	       *
+	       * _.reduce([1, 2], function(sum, n) {
+	       *   return sum + n;
+	       * }, 0);
+	       * // => 3
+	       *
+	       * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
+	       *   (result[value] || (result[value] = [])).push(key);
+	       *   return result;
+	       * }, {});
+	       * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
+	       */
+
+	      function reduce(collection, iteratee, accumulator) {
+	        var func = isArray(collection) ? arrayReduce : baseReduce,
+	            initAccum = arguments.length < 3;
+	        return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
+	      }
+	      /**
+	       * This method is like `_.reduce` except that it iterates over elements of
+	       * `collection` from right to left.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @param {*} [accumulator] The initial value.
+	       * @returns {*} Returns the accumulated value.
+	       * @see _.reduce
+	       * @example
+	       *
+	       * var array = [[0, 1], [2, 3], [4, 5]];
+	       *
+	       * _.reduceRight(array, function(flattened, other) {
+	       *   return flattened.concat(other);
+	       * }, []);
+	       * // => [4, 5, 2, 3, 0, 1]
+	       */
+
+
+	      function reduceRight(collection, iteratee, accumulator) {
+	        var func = isArray(collection) ? arrayReduceRight : baseReduce,
+	            initAccum = arguments.length < 3;
+	        return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
+	      }
+	      /**
+	       * The opposite of `_.filter`; this method returns the elements of `collection`
+	       * that `predicate` does **not** return truthy for.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the new filtered array.
+	       * @see _.filter
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney', 'age': 36, 'active': false },
+	       *   { 'user': 'fred',   'age': 40, 'active': true }
+	       * ];
+	       *
+	       * _.reject(users, function(o) { return !o.active; });
+	       * // => objects for ['fred']
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.reject(users, { 'age': 40, 'active': true });
+	       * // => objects for ['barney']
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.reject(users, ['active', false]);
+	       * // => objects for ['fred']
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.reject(users, 'active');
+	       * // => objects for ['barney']
+	       */
+
+
+	      function reject(collection, predicate) {
+	        var func = isArray(collection) ? arrayFilter : baseFilter;
+	        return func(collection, negate(getIteratee(predicate, 3)));
+	      }
+	      /**
+	       * Gets a random element from `collection`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to sample.
+	       * @returns {*} Returns the random element.
+	       * @example
+	       *
+	       * _.sample([1, 2, 3, 4]);
+	       * // => 2
+	       */
 
-	    return loadFaces(faces)
-	      .then(function () {
-	        _sceneOptions = {
-	          showFullscreenCtrl: false,
-	          autoLoad: true,
-	          compass: true,
-	          northOffset: d.ca,
-	          yaw: 0,
-	          minHfov: minHfov,
-	          maxHfov: maxHfov,
-	          hfov: defaultHfov,
-	          type: 'cubemap',
-	          cubeMap: [
-	            _dataUrlArray[0],
-	            _dataUrlArray[1],
-	            _dataUrlArray[2],
-	            _dataUrlArray[3],
-	            _dataUrlArray[4],
-	            _dataUrlArray[5]
-	          ]
-	        };
-	        return { status: 'ok' };
-	      });
-	  },
 
+	      function sample(collection) {
+	        var func = isArray(collection) ? arraySample : baseSample;
+	        return func(collection);
+	      }
+	      /**
+	       * Gets `n` random elements at unique keys from `collection` up to the
+	       * size of `collection`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to sample.
+	       * @param {number} [n=1] The number of elements to sample.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Array} Returns the random elements.
+	       * @example
+	       *
+	       * _.sampleSize([1, 2, 3], 2);
+	       * // => [3, 1]
+	       *
+	       * _.sampleSize([1, 2, 3], 4);
+	       * // => [2, 3, 1]
+	       */
 
-	  getSequenceKeyForBubble: function(d) {
-	    return d && d.sequenceKey;
-	  },
 
+	      function sampleSize(collection, n, guard) {
+	        if (guard ? isIterateeCall(collection, n, guard) : n === undefined$1) {
+	          n = 1;
+	        } else {
+	          n = toInteger(n);
+	        }
 
-	  // Updates the currently highlighted sequence and selected bubble.
-	  // Reset is only necessary when interacting with the viewport because
-	  // this implicitly changes the currently selected bubble/sequence
-	  setStyles: function (context, hovered, reset) {
-	    if (reset) {  // reset all layers
-	      context.container().selectAll('.viewfield-group')
-	        .classed('highlighted', false)
-	        .classed('hovered', false)
-	        .classed('currentView', false);
+	        var func = isArray(collection) ? arraySampleSize : baseSampleSize;
+	        return func(collection, n);
+	      }
+	      /**
+	       * Creates an array of shuffled values, using a version of the
+	       * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to shuffle.
+	       * @returns {Array} Returns the new shuffled array.
+	       * @example
+	       *
+	       * _.shuffle([1, 2, 3, 4]);
+	       * // => [4, 1, 3, 2]
+	       */
 
-	      context.container().selectAll('.sequence')
-	        .classed('highlighted', false)
-	        .classed('currentView', false);
-	    }
 
-	    var hoveredBubbleKey = hovered && hovered.key;
-	    var hoveredSequenceKey = this.getSequenceKeyForBubble(hovered);
-	    var hoveredSequence = hoveredSequenceKey && _ssCache.sequences[hoveredSequenceKey];
-	    var hoveredBubbleKeys =  (hoveredSequence && hoveredSequence.bubbles.map(function (d) { return d.key; })) || [];
+	      function shuffle(collection) {
+	        var func = isArray(collection) ? arrayShuffle : baseShuffle;
+	        return func(collection);
+	      }
+	      /**
+	       * Gets the size of `collection` by returning its length for array-like
+	       * values or the number of own enumerable string keyed properties for objects.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object|string} collection The collection to inspect.
+	       * @returns {number} Returns the collection size.
+	       * @example
+	       *
+	       * _.size([1, 2, 3]);
+	       * // => 3
+	       *
+	       * _.size({ 'a': 1, 'b': 2 });
+	       * // => 2
+	       *
+	       * _.size('pebbles');
+	       * // => 7
+	       */
 
-	    var viewer = context.container().select('.photoviewer');
-	    var selected = viewer.empty() ? undefined : viewer.datum();
-	    var selectedBubbleKey = selected && selected.key;
-	    var selectedSequenceKey = this.getSequenceKeyForBubble(selected);
-	    var selectedSequence = selectedSequenceKey && _ssCache.sequences[selectedSequenceKey];
-	    var selectedBubbleKeys = (selectedSequence && selectedSequence.bubbles.map(function (d) { return d.key; })) || [];
 
-	    // highlight sibling viewfields on either the selected or the hovered sequences
-	    var highlightedBubbleKeys = utilArrayUnion(hoveredBubbleKeys, selectedBubbleKeys);
+	      function size(collection) {
+	        if (collection == null) {
+	          return 0;
+	        }
 
-	    context.container().selectAll('.layer-streetside-images .viewfield-group')
-	      .classed('highlighted', function (d) { return highlightedBubbleKeys.indexOf(d.key) !== -1; })
-	      .classed('hovered',     function (d) { return d.key === hoveredBubbleKey; })
-	      .classed('currentView', function (d) { return d.key === selectedBubbleKey; });
+	        if (isArrayLike(collection)) {
+	          return isString(collection) ? stringSize(collection) : collection.length;
+	        }
 
-	    context.container().selectAll('.layer-streetside-images .sequence')
-	      .classed('highlighted', function (d) { return d.properties.key === hoveredSequenceKey; })
-	      .classed('currentView', function (d) { return d.properties.key === selectedSequenceKey; });
+	        var tag = getTag(collection);
 
-	    // update viewfields if needed
-	    context.container().selectAll('.viewfield-group .viewfield')
-	      .attr('d', viewfieldPath);
+	        if (tag == mapTag || tag == setTag) {
+	          return collection.size;
+	        }
 
-	    function viewfieldPath() {
-	      var d = this.parentNode.__data__;
-	      if (d.pano && d.key !== selectedBubbleKey) {
-	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-	      } else {
-	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	        return baseKeys(collection).length;
 	      }
-	    }
+	      /**
+	       * Checks if `predicate` returns truthy for **any** element of `collection`.
+	       * Iteration is stopped once `predicate` returns truthy. The predicate is
+	       * invoked with three arguments: (value, index|key, collection).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {boolean} Returns `true` if any element passes the predicate check,
+	       *  else `false`.
+	       * @example
+	       *
+	       * _.some([null, 0, 'yes', false], Boolean);
+	       * // => true
+	       *
+	       * var users = [
+	       *   { 'user': 'barney', 'active': true },
+	       *   { 'user': 'fred',   'active': false }
+	       * ];
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.some(users, { 'user': 'barney', 'active': false });
+	       * // => false
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.some(users, ['active', false]);
+	       * // => true
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.some(users, 'active');
+	       * // => true
+	       */
 
-	    return this;
-	  },
 
+	      function some(collection, predicate, guard) {
+	        var func = isArray(collection) ? arraySome : baseSome;
 
-	  /**
-	   * cache().
-	   */
-	  cache: function () {
-	    return _ssCache;
-	  }
-	};
+	        if (guard && isIterateeCall(collection, predicate, guard)) {
+	          predicate = undefined$1;
+	        }
 
-	var apibase$4 = 'https://taginfo.openstreetmap.org/api/4/';
-	var _inflight$2 = {};
-	var _popularKeys = {};
-	var _taginfoCache = {};
+	        return func(collection, getIteratee(predicate, 3));
+	      }
+	      /**
+	       * Creates an array of elements, sorted in ascending order by the results of
+	       * running each element in a collection thru each iteratee. This method
+	       * performs a stable sort, that is, it preserves the original sort order of
+	       * equal elements. The iteratees are invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Collection
+	       * @param {Array|Object} collection The collection to iterate over.
+	       * @param {...(Function|Function[])} [iteratees=[_.identity]]
+	       *  The iteratees to sort by.
+	       * @returns {Array} Returns the new sorted array.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'fred',   'age': 48 },
+	       *   { 'user': 'barney', 'age': 36 },
+	       *   { 'user': 'fred',   'age': 30 },
+	       *   { 'user': 'barney', 'age': 34 }
+	       * ];
+	       *
+	       * _.sortBy(users, [function(o) { return o.user; }]);
+	       * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 30]]
+	       *
+	       * _.sortBy(users, ['user', 'age']);
+	       * // => objects for [['barney', 34], ['barney', 36], ['fred', 30], ['fred', 48]]
+	       */
 
-	var tag_sorts = {
-	    point: 'count_nodes',
-	    vertex: 'count_nodes',
-	    area: 'count_ways',
-	    line: 'count_ways'
-	};
-	var tag_sort_members = {
-	    point: 'count_node_members',
-	    vertex: 'count_node_members',
-	    area: 'count_way_members',
-	    line: 'count_way_members',
-	    relation: 'count_relation_members'
-	};
-	var tag_filters = {
-	    point: 'nodes',
-	    vertex: 'nodes',
-	    area: 'ways',
-	    line: 'ways'
-	};
-	var tag_members_fractions = {
-	    point: 'count_node_members_fraction',
-	    vertex: 'count_node_members_fraction',
-	    area: 'count_way_members_fraction',
-	    line: 'count_way_members_fraction',
-	    relation: 'count_relation_members_fraction'
-	};
 
+	      var sortBy = baseRest(function (collection, iteratees) {
+	        if (collection == null) {
+	          return [];
+	        }
 
-	function sets(params, n, o) {
-	    if (params.geometry && o[params.geometry]) {
-	        params[n] = o[params.geometry];
-	    }
-	    return params;
-	}
+	        var length = iteratees.length;
 
+	        if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
+	          iteratees = [];
+	        } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
+	          iteratees = [iteratees[0]];
+	        }
 
-	function setFilter(params) {
-	    return sets(params, 'filter', tag_filters);
-	}
+	        return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
+	      });
+	      /*------------------------------------------------------------------------*/
 
+	      /**
+	       * Gets the timestamp of the number of milliseconds that have elapsed since
+	       * the Unix epoch (1 January 1970 00:00:00 UTC).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.4.0
+	       * @category Date
+	       * @returns {number} Returns the timestamp.
+	       * @example
+	       *
+	       * _.defer(function(stamp) {
+	       *   console.log(_.now() - stamp);
+	       * }, _.now());
+	       * // => Logs the number of milliseconds it took for the deferred invocation.
+	       */
 
-	function setSort(params) {
-	    return sets(params, 'sortname', tag_sorts);
-	}
+	      var now = ctxNow || function () {
+	        return root.Date.now();
+	      };
+	      /*------------------------------------------------------------------------*/
 
+	      /**
+	       * The opposite of `_.before`; this method creates a function that invokes
+	       * `func` once it's called `n` or more times.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {number} n The number of calls before `func` is invoked.
+	       * @param {Function} func The function to restrict.
+	       * @returns {Function} Returns the new restricted function.
+	       * @example
+	       *
+	       * var saves = ['profile', 'settings'];
+	       *
+	       * var done = _.after(saves.length, function() {
+	       *   console.log('done saving!');
+	       * });
+	       *
+	       * _.forEach(saves, function(type) {
+	       *   asyncSave({ 'type': type, 'complete': done });
+	       * });
+	       * // => Logs 'done saving!' after the two async saves have completed.
+	       */
 
-	function setSortMembers(params) {
-	    return sets(params, 'sortname', tag_sort_members);
-	}
 
+	      function after(n, func) {
+	        if (typeof func != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
+	        }
 
-	function clean(params) {
-	    return utilObjectOmit(params, ['geometry', 'debounce']);
-	}
+	        n = toInteger(n);
+	        return function () {
+	          if (--n < 1) {
+	            return func.apply(this, arguments);
+	          }
+	        };
+	      }
+	      /**
+	       * Creates a function that invokes `func`, with up to `n` arguments,
+	       * ignoring any additional arguments.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Function
+	       * @param {Function} func The function to cap arguments for.
+	       * @param {number} [n=func.length] The arity cap.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Function} Returns the new capped function.
+	       * @example
+	       *
+	       * _.map(['6', '8', '10'], _.ary(parseInt, 1));
+	       * // => [6, 8, 10]
+	       */
 
 
-	function filterKeys(type) {
-	    var count_type = type ? 'count_' + type : 'count_all';
-	    return function(d) {
-	        return parseFloat(d[count_type]) > 2500 || d.in_wiki;
-	    };
-	}
+	      function ary(func, n, guard) {
+	        n = guard ? undefined$1 : n;
+	        n = func && n == null ? func.length : n;
+	        return createWrap(func, WRAP_ARY_FLAG, undefined$1, undefined$1, undefined$1, undefined$1, n);
+	      }
+	      /**
+	       * Creates a function that invokes `func`, with the `this` binding and arguments
+	       * of the created function, while it's called less than `n` times. Subsequent
+	       * calls to the created function return the result of the last `func` invocation.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Function
+	       * @param {number} n The number of calls at which `func` is no longer invoked.
+	       * @param {Function} func The function to restrict.
+	       * @returns {Function} Returns the new restricted function.
+	       * @example
+	       *
+	       * jQuery(element).on('click', _.before(5, addContactToList));
+	       * // => Allows adding up to 4 contacts to the list.
+	       */
 
 
-	function filterMultikeys(prefix) {
-	    return function(d) {
-	        // d.key begins with prefix, and d.key contains no additional ':'s
-	        var re = new RegExp('^' + prefix + '(.*)$');
-	        var matches = d.key.match(re) || [];
-	        return (matches.length === 2 && matches[1].indexOf(':') === -1);
-	    };
-	}
+	      function before(n, func) {
+	        var result;
 
+	        if (typeof func != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
+	        }
 
-	function filterValues(allowUpperCase) {
-	    return function(d) {
-	        if (d.value.match(/[;,]/) !== null) { return false; }  // exclude some punctuation
-	        if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) { return false; }  // exclude uppercase letters
-	        return parseFloat(d.fraction) > 0.0;
-	    };
-	}
+	        n = toInteger(n);
+	        return function () {
+	          if (--n > 0) {
+	            result = func.apply(this, arguments);
+	          }
 
+	          if (n <= 1) {
+	            func = undefined$1;
+	          }
 
-	function filterRoles(geometry) {
-	    return function(d) {
-	        if (d.role === '') { return false; } // exclude empty role
-	        if (d.role.match(/[A-Z*;,]/) !== null) { return false; }  // exclude uppercase letters and some punctuation
-	        return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
-	    };
-	}
+	          return result;
+	        };
+	      }
+	      /**
+	       * Creates a function that invokes `func` with the `this` binding of `thisArg`
+	       * and `partials` prepended to the arguments it receives.
+	       *
+	       * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
+	       * may be used as a placeholder for partially applied arguments.
+	       *
+	       * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
+	       * property of bound functions.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {Function} func The function to bind.
+	       * @param {*} thisArg The `this` binding of `func`.
+	       * @param {...*} [partials] The arguments to be partially applied.
+	       * @returns {Function} Returns the new bound function.
+	       * @example
+	       *
+	       * function greet(greeting, punctuation) {
+	       *   return greeting + ' ' + this.user + punctuation;
+	       * }
+	       *
+	       * var object = { 'user': 'fred' };
+	       *
+	       * var bound = _.bind(greet, object, 'hi');
+	       * bound('!');
+	       * // => 'hi fred!'
+	       *
+	       * // Bound with placeholders.
+	       * var bound = _.bind(greet, object, _, '!');
+	       * bound('hi');
+	       * // => 'hi fred!'
+	       */
 
 
-	function valKey(d) {
-	    return {
-	        value: d.key,
-	        title: d.key
-	    };
-	}
+	      var bind = baseRest(function (func, thisArg, partials) {
+	        var bitmask = WRAP_BIND_FLAG;
 
+	        if (partials.length) {
+	          var holders = replaceHolders(partials, getHolder(bind));
+	          bitmask |= WRAP_PARTIAL_FLAG;
+	        }
 
-	function valKeyDescription(d) {
-	    var obj = {
-	        value: d.value,
-	        title: d.description || d.value
-	    };
-	    if (d.count) {
-	        obj.count = d.count;
-	    }
-	    return obj;
-	}
+	        return createWrap(func, bitmask, thisArg, partials, holders);
+	      });
+	      /**
+	       * Creates a function that invokes the method at `object[key]` with `partials`
+	       * prepended to the arguments it receives.
+	       *
+	       * This method differs from `_.bind` by allowing bound functions to reference
+	       * methods that may be redefined or don't yet exist. See
+	       * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
+	       * for more details.
+	       *
+	       * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
+	       * builds, may be used as a placeholder for partially applied arguments.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.10.0
+	       * @category Function
+	       * @param {Object} object The object to invoke the method on.
+	       * @param {string} key The key of the method.
+	       * @param {...*} [partials] The arguments to be partially applied.
+	       * @returns {Function} Returns the new bound function.
+	       * @example
+	       *
+	       * var object = {
+	       *   'user': 'fred',
+	       *   'greet': function(greeting, punctuation) {
+	       *     return greeting + ' ' + this.user + punctuation;
+	       *   }
+	       * };
+	       *
+	       * var bound = _.bindKey(object, 'greet', 'hi');
+	       * bound('!');
+	       * // => 'hi fred!'
+	       *
+	       * object.greet = function(greeting, punctuation) {
+	       *   return greeting + 'ya ' + this.user + punctuation;
+	       * };
+	       *
+	       * bound('!');
+	       * // => 'hiya fred!'
+	       *
+	       * // Bound with placeholders.
+	       * var bound = _.bindKey(object, 'greet', _, '!');
+	       * bound('hi');
+	       * // => 'hiya fred!'
+	       */
 
+	      var bindKey = baseRest(function (object, key, partials) {
+	        var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG;
 
-	function roleKey(d) {
-	    return {
-	        value: d.role,
-	        title: d.role
-	    };
-	}
+	        if (partials.length) {
+	          var holders = replaceHolders(partials, getHolder(bindKey));
+	          bitmask |= WRAP_PARTIAL_FLAG;
+	        }
+
+	        return createWrap(key, bitmask, object, partials, holders);
+	      });
+	      /**
+	       * Creates a function that accepts arguments of `func` and either invokes
+	       * `func` returning its result, if at least `arity` number of arguments have
+	       * been provided, or returns a function that accepts the remaining `func`
+	       * arguments, and so on. The arity of `func` may be specified if `func.length`
+	       * is not sufficient.
+	       *
+	       * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
+	       * may be used as a placeholder for provided arguments.
+	       *
+	       * **Note:** This method doesn't set the "length" property of curried functions.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Function
+	       * @param {Function} func The function to curry.
+	       * @param {number} [arity=func.length] The arity of `func`.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Function} Returns the new curried function.
+	       * @example
+	       *
+	       * var abc = function(a, b, c) {
+	       *   return [a, b, c];
+	       * };
+	       *
+	       * var curried = _.curry(abc);
+	       *
+	       * curried(1)(2)(3);
+	       * // => [1, 2, 3]
+	       *
+	       * curried(1, 2)(3);
+	       * // => [1, 2, 3]
+	       *
+	       * curried(1, 2, 3);
+	       * // => [1, 2, 3]
+	       *
+	       * // Curried with placeholders.
+	       * curried(1)(_, 3)(2);
+	       * // => [1, 2, 3]
+	       */
 
+	      function curry(func, arity, guard) {
+	        arity = guard ? undefined$1 : arity;
+	        var result = createWrap(func, WRAP_CURRY_FLAG, undefined$1, undefined$1, undefined$1, undefined$1, undefined$1, arity);
+	        result.placeholder = curry.placeholder;
+	        return result;
+	      }
+	      /**
+	       * This method is like `_.curry` except that arguments are applied to `func`
+	       * in the manner of `_.partialRight` instead of `_.partial`.
+	       *
+	       * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
+	       * builds, may be used as a placeholder for provided arguments.
+	       *
+	       * **Note:** This method doesn't set the "length" property of curried functions.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Function
+	       * @param {Function} func The function to curry.
+	       * @param {number} [arity=func.length] The arity of `func`.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Function} Returns the new curried function.
+	       * @example
+	       *
+	       * var abc = function(a, b, c) {
+	       *   return [a, b, c];
+	       * };
+	       *
+	       * var curried = _.curryRight(abc);
+	       *
+	       * curried(3)(2)(1);
+	       * // => [1, 2, 3]
+	       *
+	       * curried(2, 3)(1);
+	       * // => [1, 2, 3]
+	       *
+	       * curried(1, 2, 3);
+	       * // => [1, 2, 3]
+	       *
+	       * // Curried with placeholders.
+	       * curried(3)(1, _)(2);
+	       * // => [1, 2, 3]
+	       */
 
-	// sort keys with ':' lower than keys without ':'
-	function sortKeys(a, b) {
-	    return (a.key.indexOf(':') === -1 && b.key.indexOf(':') !== -1) ? -1
-	        : (a.key.indexOf(':') !== -1 && b.key.indexOf(':') === -1) ? 1
-	        : 0;
-	}
 
+	      function curryRight(func, arity, guard) {
+	        arity = guard ? undefined$1 : arity;
+	        var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined$1, undefined$1, undefined$1, undefined$1, undefined$1, arity);
+	        result.placeholder = curryRight.placeholder;
+	        return result;
+	      }
+	      /**
+	       * Creates a debounced function that delays invoking `func` until after `wait`
+	       * milliseconds have elapsed since the last time the debounced function was
+	       * invoked. The debounced function comes with a `cancel` method to cancel
+	       * delayed `func` invocations and a `flush` method to immediately invoke them.
+	       * Provide `options` to indicate whether `func` should be invoked on the
+	       * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
+	       * with the last arguments provided to the debounced function. Subsequent
+	       * calls to the debounced function return the result of the last `func`
+	       * invocation.
+	       *
+	       * **Note:** If `leading` and `trailing` options are `true`, `func` is
+	       * invoked on the trailing edge of the timeout only if the debounced function
+	       * is invoked more than once during the `wait` timeout.
+	       *
+	       * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+	       * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+	       *
+	       * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+	       * for details over the differences between `_.debounce` and `_.throttle`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {Function} func The function to debounce.
+	       * @param {number} [wait=0] The number of milliseconds to delay.
+	       * @param {Object} [options={}] The options object.
+	       * @param {boolean} [options.leading=false]
+	       *  Specify invoking on the leading edge of the timeout.
+	       * @param {number} [options.maxWait]
+	       *  The maximum time `func` is allowed to be delayed before it's invoked.
+	       * @param {boolean} [options.trailing=true]
+	       *  Specify invoking on the trailing edge of the timeout.
+	       * @returns {Function} Returns the new debounced function.
+	       * @example
+	       *
+	       * // Avoid costly calculations while the window size is in flux.
+	       * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
+	       *
+	       * // Invoke `sendMail` when clicked, debouncing subsequent calls.
+	       * jQuery(element).on('click', _.debounce(sendMail, 300, {
+	       *   'leading': true,
+	       *   'trailing': false
+	       * }));
+	       *
+	       * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
+	       * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
+	       * var source = new EventSource('/stream');
+	       * jQuery(source).on('message', debounced);
+	       *
+	       * // Cancel the trailing debounced invocation.
+	       * jQuery(window).on('popstate', debounced.cancel);
+	       */
 
-	var debouncedRequest$1 = debounce(request$1, 300, { leading: false });
 
-	function request$1(url, params, exactMatch, callback, loaded) {
-	    if (_inflight$2[url]) { return; }
+	      function debounce(func, wait, options) {
+	        var lastArgs,
+	            lastThis,
+	            maxWait,
+	            result,
+	            timerId,
+	            lastCallTime,
+	            lastInvokeTime = 0,
+	            leading = false,
+	            maxing = false,
+	            trailing = true;
 
-	    if (checkCache(url, params, exactMatch, callback)) { return; }
+	        if (typeof func != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
+	        }
 
-	    var controller = new AbortController();
-	    _inflight$2[url] = controller;
+	        wait = toNumber(wait) || 0;
 
-	    d3_json(url, { signal: controller.signal })
-	        .then(function(result) {
-	            delete _inflight$2[url];
-	            if (loaded) { loaded(null, result); }
-	        })
-	        .catch(function(err) {
-	            delete _inflight$2[url];
-	            if (err.name === 'AbortError') { return; }
-	            if (loaded) { loaded(err.message); }
-	        });
-	}
+	        if (isObject(options)) {
+	          leading = !!options.leading;
+	          maxing = 'maxWait' in options;
+	          maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
+	          trailing = 'trailing' in options ? !!options.trailing : trailing;
+	        }
 
+	        function invokeFunc(time) {
+	          var args = lastArgs,
+	              thisArg = lastThis;
+	          lastArgs = lastThis = undefined$1;
+	          lastInvokeTime = time;
+	          result = func.apply(thisArg, args);
+	          return result;
+	        }
 
-	function checkCache(url, params, exactMatch, callback) {
-	    var rp = params.rp || 25;
-	    var testQuery = params.query || '';
-	    var testUrl = url;
+	        function leadingEdge(time) {
+	          // Reset any `maxWait` timer.
+	          lastInvokeTime = time; // Start the timer for the trailing edge.
 
-	    do {
-	        var hit = _taginfoCache[testUrl];
+	          timerId = setTimeout(timerExpired, wait); // Invoke the leading edge.
 
-	        // exact match, or shorter match yielding fewer than max results (rp)
-	        if (hit && (url === testUrl || hit.length < rp)) {
-	            callback(null, hit);
-	            return true;
+	          return leading ? invokeFunc(time) : result;
+	        }
+
+	        function remainingWait(time) {
+	          var timeSinceLastCall = time - lastCallTime,
+	              timeSinceLastInvoke = time - lastInvokeTime,
+	              timeWaiting = wait - timeSinceLastCall;
+	          return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
 	        }
 
-	        // don't try to shorten the query
-	        if (exactMatch || !testQuery.length) { return false; }
+	        function shouldInvoke(time) {
+	          var timeSinceLastCall = time - lastCallTime,
+	              timeSinceLastInvoke = time - lastInvokeTime; // Either this is the first call, activity has stopped and we're at the
+	          // trailing edge, the system time has gone backwards and we're treating
+	          // it as the trailing edge, or we've hit the `maxWait` limit.
 
-	        // do shorten the query to see if we already have a cached result
-	        // that has returned fewer than max results (rp)
-	        testQuery = testQuery.slice(0, -1);
-	        testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
-	    } while (testQuery.length >= 0);
+	          return lastCallTime === undefined$1 || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
+	        }
 
-	    return false;
-	}
+	        function timerExpired() {
+	          var time = now();
 
+	          if (shouldInvoke(time)) {
+	            return trailingEdge(time);
+	          } // Restart the timer.
 
-	var serviceTaginfo = {
 
-	    init: function() {
-	        _inflight$2 = {};
-	        _taginfoCache = {};
-	        _popularKeys = {
-	            // manually exclude some keys – #5377, #7485
-	            postal_code: true,
-	            full_name: true,
-	            loc_name: true,
-	            reg_name: true,
-	            short_name: true,
-	            sorting_name: true,
-	            artist_name: true,
-	            nat_name: true,
-	            long_name: true,
-	            'bridge:name': true
-	        };
+	          timerId = setTimeout(timerExpired, remainingWait(time));
+	        }
 
-	        // Fetch popular keys.  We'll exclude these from `values`
-	        // lookups because they stress taginfo, and they aren't likely
-	        // to yield meaningful autocomplete results.. see #3955
-	        var params = {
-	            rp: 100,
-	            sortname: 'values_all',
-	            sortorder: 'desc',
-	            page: 1,
-	            debounce: false,
-	            lang: _mainLocalizer.languageCode()
-	        };
-	        this.keys(params, function(err, data) {
-	            if (err) { return; }
-	            data.forEach(function(d) {
-	                if (d.value === 'opening_hours') { return; }  // exception
-	                _popularKeys[d.value] = true;
-	            });
-	        });
-	    },
+	        function trailingEdge(time) {
+	          timerId = undefined$1; // Only invoke if we have `lastArgs` which means `func` has been
+	          // debounced at least once.
 
+	          if (trailing && lastArgs) {
+	            return invokeFunc(time);
+	          }
 
-	    reset: function() {
-	        Object.values(_inflight$2).forEach(function(controller) { controller.abort(); });
-	        _inflight$2 = {};
-	    },
+	          lastArgs = lastThis = undefined$1;
+	          return result;
+	        }
 
+	        function cancel() {
+	          if (timerId !== undefined$1) {
+	            clearTimeout(timerId);
+	          }
 
-	    keys: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        params = clean(setSort(params));
-	        params = Object.assign({
-	            rp: 10,
-	            sortname: 'count_all',
-	            sortorder: 'desc',
-	            page: 1,
-	            lang: _mainLocalizer.languageCode()
-	        }, params);
+	          lastInvokeTime = 0;
+	          lastArgs = lastCallTime = lastThis = timerId = undefined$1;
+	        }
 
-	        var url = apibase$4 + 'keys/all?' + utilQsString(params);
-	        doRequest(url, params, false, callback, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else {
-	                var f = filterKeys(params.filter);
-	                var result = d.data.filter(f).sort(sortKeys).map(valKey);
-	                _taginfoCache[url] = result;
-	                callback(null, result);
-	            }
-	        });
-	    },
+	        function flush() {
+	          return timerId === undefined$1 ? result : trailingEdge(now());
+	        }
 
+	        function debounced() {
+	          var time = now(),
+	              isInvoking = shouldInvoke(time);
+	          lastArgs = arguments;
+	          lastThis = this;
+	          lastCallTime = time;
 
-	    multikeys: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        params = clean(setSort(params));
-	        params = Object.assign({
-	            rp: 25,
-	            sortname: 'count_all',
-	            sortorder: 'desc',
-	            page: 1,
-	            lang: _mainLocalizer.languageCode()
-	        }, params);
-
-	        var prefix = params.query;
-	        var url = apibase$4 + 'keys/all?' + utilQsString(params);
-	        doRequest(url, params, true, callback, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else {
-	                var f = filterMultikeys(prefix);
-	                var result = d.data.filter(f).map(valKey);
-	                _taginfoCache[url] = result;
-	                callback(null, result);
+	          if (isInvoking) {
+	            if (timerId === undefined$1) {
+	              return leadingEdge(lastCallTime);
 	            }
-	        });
-	    },
 
+	            if (maxing) {
+	              // Handle invocations in a tight loop.
+	              clearTimeout(timerId);
+	              timerId = setTimeout(timerExpired, wait);
+	              return invokeFunc(lastCallTime);
+	            }
+	          }
 
-	    values: function(params, callback) {
-	        // Exclude popular keys from values lookups.. see #3955
-	        var key = params.key;
-	        if (key && _popularKeys[key]) {
-	            callback(null, []);
-	            return;
+	          if (timerId === undefined$1) {
+	            timerId = setTimeout(timerExpired, wait);
+	          }
+
+	          return result;
 	        }
 
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        params = clean(setSort(setFilter(params)));
-	        params = Object.assign({
-	            rp: 25,
-	            sortname: 'count_all',
-	            sortorder: 'desc',
-	            page: 1,
-	            lang: _mainLocalizer.languageCode()
-	        }, params);
+	        debounced.cancel = cancel;
+	        debounced.flush = flush;
+	        return debounced;
+	      }
+	      /**
+	       * Defers invoking the `func` until the current call stack has cleared. Any
+	       * additional arguments are provided to `func` when it's invoked.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {Function} func The function to defer.
+	       * @param {...*} [args] The arguments to invoke `func` with.
+	       * @returns {number} Returns the timer id.
+	       * @example
+	       *
+	       * _.defer(function(text) {
+	       *   console.log(text);
+	       * }, 'deferred');
+	       * // => Logs 'deferred' after one millisecond.
+	       */
 
-	        var url = apibase$4 + 'key/values?' + utilQsString(params);
-	        doRequest(url, params, false, callback, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else {
-	                // In most cases we prefer taginfo value results with lowercase letters.
-	                // A few OSM keys expect values to contain uppercase values (see #3377).
-	                // This is not an exhaustive list (e.g. `name` also has uppercase values)
-	                // but these are the fields where taginfo value lookup is most useful.
-	                var re = /network|taxon|genus|species|brand|grape_variety|royal_cypher|listed_status|booth|rating|stars|:output|_hours|_times|_ref|manufacturer|country|target|brewery/;
-	                var allowUpperCase = re.test(params.key);
-	                var f = filterValues(allowUpperCase);
-
-	                var result = d.data.filter(f).map(valKeyDescription);
-	                _taginfoCache[url] = result;
-	                callback(null, result);
-	            }
-	        });
-	    },
 
+	      var defer = baseRest(function (func, args) {
+	        return baseDelay(func, 1, args);
+	      });
+	      /**
+	       * Invokes `func` after `wait` milliseconds. Any additional arguments are
+	       * provided to `func` when it's invoked.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {Function} func The function to delay.
+	       * @param {number} wait The number of milliseconds to delay invocation.
+	       * @param {...*} [args] The arguments to invoke `func` with.
+	       * @returns {number} Returns the timer id.
+	       * @example
+	       *
+	       * _.delay(function(text) {
+	       *   console.log(text);
+	       * }, 1000, 'later');
+	       * // => Logs 'later' after one second.
+	       */
 
-	    roles: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        var geometry = params.geometry;
-	        params = clean(setSortMembers(params));
-	        params = Object.assign({
-	            rp: 25,
-	            sortname: 'count_all_members',
-	            sortorder: 'desc',
-	            page: 1,
-	            lang: _mainLocalizer.languageCode()
-	        }, params);
-
-	        var url = apibase$4 + 'relation/roles?' + utilQsString(params);
-	        doRequest(url, params, true, callback, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else {
-	                var f = filterRoles(geometry);
-	                var result = d.data.filter(f).map(roleKey);
-	                _taginfoCache[url] = result;
-	                callback(null, result);
-	            }
-	        });
-	    },
+	      var delay = baseRest(function (func, wait, args) {
+	        return baseDelay(func, toNumber(wait) || 0, args);
+	      });
+	      /**
+	       * Creates a function that invokes `func` with arguments reversed.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Function
+	       * @param {Function} func The function to flip arguments for.
+	       * @returns {Function} Returns the new flipped function.
+	       * @example
+	       *
+	       * var flipped = _.flip(function() {
+	       *   return _.toArray(arguments);
+	       * });
+	       *
+	       * flipped('a', 'b', 'c', 'd');
+	       * // => ['d', 'c', 'b', 'a']
+	       */
 
+	      function flip(func) {
+	        return createWrap(func, WRAP_FLIP_FLAG);
+	      }
+	      /**
+	       * Creates a function that memoizes the result of `func`. If `resolver` is
+	       * provided, it determines the cache key for storing the result based on the
+	       * arguments provided to the memoized function. By default, the first argument
+	       * provided to the memoized function is used as the map cache key. The `func`
+	       * is invoked with the `this` binding of the memoized function.
+	       *
+	       * **Note:** The cache is exposed as the `cache` property on the memoized
+	       * function. Its creation may be customized by replacing the `_.memoize.Cache`
+	       * constructor with one whose instances implement the
+	       * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
+	       * method interface of `clear`, `delete`, `get`, `has`, and `set`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {Function} func The function to have its output memoized.
+	       * @param {Function} [resolver] The function to resolve the cache key.
+	       * @returns {Function} Returns the new memoized function.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': 2 };
+	       * var other = { 'c': 3, 'd': 4 };
+	       *
+	       * var values = _.memoize(_.values);
+	       * values(object);
+	       * // => [1, 2]
+	       *
+	       * values(other);
+	       * // => [3, 4]
+	       *
+	       * object.a = 2;
+	       * values(object);
+	       * // => [1, 2]
+	       *
+	       * // Modify the result cache.
+	       * values.cache.set(object, ['a', 'b']);
+	       * values(object);
+	       * // => ['a', 'b']
+	       *
+	       * // Replace `_.memoize.Cache`.
+	       * _.memoize.Cache = WeakMap;
+	       */
 
-	    docs: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        params = clean(setSort(params));
 
-	        var path = 'key/wiki_pages?';
-	        if (params.value) {
-	            path = 'tag/wiki_pages?';
-	        } else if (params.rtype) {
-	            path = 'relation/wiki_pages?';
+	      function memoize(func, resolver) {
+	        if (typeof func != 'function' || resolver != null && typeof resolver != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
 	        }
 
-	        var url = apibase$4 + path + utilQsString(params);
-	        doRequest(url, params, true, callback, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else {
-	                _taginfoCache[url] = d.data;
-	                callback(null, d.data);
-	            }
-	        });
-	    },
+	        var memoized = function memoized() {
+	          var args = arguments,
+	              key = resolver ? resolver.apply(this, args) : args[0],
+	              cache = memoized.cache;
 
+	          if (cache.has(key)) {
+	            return cache.get(key);
+	          }
 
-	    apibase: function(_) {
-	        if (!arguments.length) { return apibase$4; }
-	        apibase$4 = _;
-	        return this;
-	    }
+	          var result = func.apply(this, args);
+	          memoized.cache = cache.set(key, result) || cache;
+	          return result;
+	        };
 
-	};
+	        memoized.cache = new (memoize.Cache || MapCache)();
+	        return memoized;
+	      } // Expose `MapCache`.
 
-	var helpers$1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-	/**
-	 * @module helpers
-	 */
-	/**
-	 * Earth Radius used with the Harvesine formula and approximates using a spherical (non-ellipsoid) Earth.
-	 *
-	 * @memberof helpers
-	 * @type {number}
-	 */
-	exports.earthRadius = 6371008.8;
-	/**
-	 * Unit of measurement factors using a spherical (non-ellipsoid) earth radius.
-	 *
-	 * @memberof helpers
-	 * @type {Object}
-	 */
-	exports.factors = {
-	    centimeters: exports.earthRadius * 100,
-	    centimetres: exports.earthRadius * 100,
-	    degrees: exports.earthRadius / 111325,
-	    feet: exports.earthRadius * 3.28084,
-	    inches: exports.earthRadius * 39.370,
-	    kilometers: exports.earthRadius / 1000,
-	    kilometres: exports.earthRadius / 1000,
-	    meters: exports.earthRadius,
-	    metres: exports.earthRadius,
-	    miles: exports.earthRadius / 1609.344,
-	    millimeters: exports.earthRadius * 1000,
-	    millimetres: exports.earthRadius * 1000,
-	    nauticalmiles: exports.earthRadius / 1852,
-	    radians: 1,
-	    yards: exports.earthRadius / 1.0936,
-	};
-	/**
-	 * Units of measurement factors based on 1 meter.
-	 *
-	 * @memberof helpers
-	 * @type {Object}
-	 */
-	exports.unitsFactors = {
-	    centimeters: 100,
-	    centimetres: 100,
-	    degrees: 1 / 111325,
-	    feet: 3.28084,
-	    inches: 39.370,
-	    kilometers: 1 / 1000,
-	    kilometres: 1 / 1000,
-	    meters: 1,
-	    metres: 1,
-	    miles: 1 / 1609.344,
-	    millimeters: 1000,
-	    millimetres: 1000,
-	    nauticalmiles: 1 / 1852,
-	    radians: 1 / exports.earthRadius,
-	    yards: 1 / 1.0936,
-	};
-	/**
-	 * Area of measurement factors based on 1 square meter.
-	 *
-	 * @memberof helpers
-	 * @type {Object}
-	 */
-	exports.areaFactors = {
-	    acres: 0.000247105,
-	    centimeters: 10000,
-	    centimetres: 10000,
-	    feet: 10.763910417,
-	    inches: 1550.003100006,
-	    kilometers: 0.000001,
-	    kilometres: 0.000001,
-	    meters: 1,
-	    metres: 1,
-	    miles: 3.86e-7,
-	    millimeters: 1000000,
-	    millimetres: 1000000,
-	    yards: 1.195990046,
-	};
-	/**
-	 * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
-	 *
-	 * @name feature
-	 * @param {Geometry} geometry input geometry
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature} a GeoJSON Feature
-	 * @example
-	 * var geometry = {
-	 *   "type": "Point",
-	 *   "coordinates": [110, 50]
-	 * };
-	 *
-	 * var feature = turf.feature(geometry);
-	 *
-	 * //=feature
-	 */
-	function feature(geom, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var feat = { type: "Feature" };
-	    if (options.id === 0 || options.id) {
-	        feat.id = options.id;
-	    }
-	    if (options.bbox) {
-	        feat.bbox = options.bbox;
-	    }
-	    feat.properties = properties || {};
-	    feat.geometry = geom;
-	    return feat;
-	}
-	exports.feature = feature;
-	/**
-	 * Creates a GeoJSON {@link Geometry} from a Geometry string type & coordinates.
-	 * For GeometryCollection type use `helpers.geometryCollection`
-	 *
-	 * @name geometry
-	 * @param {string} type Geometry Type
-	 * @param {Array<any>} coordinates Coordinates
-	 * @param {Object} [options={}] Optional Parameters
-	 * @returns {Geometry} a GeoJSON Geometry
-	 * @example
-	 * var type = "Point";
-	 * var coordinates = [110, 50];
-	 * var geometry = turf.geometry(type, coordinates);
-	 * // => geometry
-	 */
-	function geometry(type, coordinates, options) {
-	    switch (type) {
-	        case "Point": return point(coordinates).geometry;
-	        case "LineString": return lineString(coordinates).geometry;
-	        case "Polygon": return polygon(coordinates).geometry;
-	        case "MultiPoint": return multiPoint(coordinates).geometry;
-	        case "MultiLineString": return multiLineString(coordinates).geometry;
-	        case "MultiPolygon": return multiPolygon(coordinates).geometry;
-	        default: throw new Error(type + " is invalid");
-	    }
-	}
-	exports.geometry = geometry;
-	/**
-	 * Creates a {@link Point} {@link Feature} from a Position.
-	 *
-	 * @name point
-	 * @param {Array<number>} coordinates longitude, latitude position (each in decimal degrees)
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<Point>} a Point feature
-	 * @example
-	 * var point = turf.point([-75.343, 39.984]);
-	 *
-	 * //=point
-	 */
-	function point(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var geom = {
-	        type: "Point",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.point = point;
-	/**
-	 * Creates a {@link Point} {@link FeatureCollection} from an Array of Point coordinates.
-	 *
-	 * @name points
-	 * @param {Array<Array<number>>} coordinates an array of Points
-	 * @param {Object} [properties={}] Translate these properties to each Feature
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north]
-	 * associated with the FeatureCollection
-	 * @param {string|number} [options.id] Identifier associated with the FeatureCollection
-	 * @returns {FeatureCollection<Point>} Point Feature
-	 * @example
-	 * var points = turf.points([
-	 *   [-75, 39],
-	 *   [-80, 45],
-	 *   [-78, 50]
-	 * ]);
-	 *
-	 * //=points
-	 */
-	function points(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    return featureCollection(coordinates.map(function (coords) {
-	        return point(coords, properties);
-	    }), options);
-	}
-	exports.points = points;
-	/**
-	 * Creates a {@link Polygon} {@link Feature} from an Array of LinearRings.
-	 *
-	 * @name polygon
-	 * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<Polygon>} Polygon Feature
-	 * @example
-	 * var polygon = turf.polygon([[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]], { name: 'poly1' });
-	 *
-	 * //=polygon
-	 */
-	function polygon(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
-	        var ring = coordinates_1[_i];
-	        if (ring.length < 4) {
-	            throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
-	        }
-	        for (var j = 0; j < ring[ring.length - 1].length; j++) {
-	            // Check if first point of Polygon contains two numbers
-	            if (ring[ring.length - 1][j] !== ring[0][j]) {
-	                throw new Error("First and last Position are not equivalent.");
-	            }
+
+	      memoize.Cache = MapCache;
+	      /**
+	       * Creates a function that negates the result of the predicate `func`. The
+	       * `func` predicate is invoked with the `this` binding and arguments of the
+	       * created function.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Function
+	       * @param {Function} predicate The predicate to negate.
+	       * @returns {Function} Returns the new negated function.
+	       * @example
+	       *
+	       * function isEven(n) {
+	       *   return n % 2 == 0;
+	       * }
+	       *
+	       * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
+	       * // => [1, 3, 5]
+	       */
+
+	      function negate(predicate) {
+	        if (typeof predicate != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
 	        }
-	    }
-	    var geom = {
-	        type: "Polygon",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.polygon = polygon;
-	/**
-	 * Creates a {@link Polygon} {@link FeatureCollection} from an Array of Polygon coordinates.
-	 *
-	 * @name polygons
-	 * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygon coordinates
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the FeatureCollection
-	 * @returns {FeatureCollection<Polygon>} Polygon FeatureCollection
-	 * @example
-	 * var polygons = turf.polygons([
-	 *   [[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]],
-	 *   [[[-15, 42], [-14, 46], [-12, 41], [-17, 44], [-15, 42]]],
-	 * ]);
-	 *
-	 * //=polygons
-	 */
-	function polygons(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    return featureCollection(coordinates.map(function (coords) {
-	        return polygon(coords, properties);
-	    }), options);
-	}
-	exports.polygons = polygons;
-	/**
-	 * Creates a {@link LineString} {@link Feature} from an Array of Positions.
-	 *
-	 * @name lineString
-	 * @param {Array<Array<number>>} coordinates an array of Positions
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<LineString>} LineString Feature
-	 * @example
-	 * var linestring1 = turf.lineString([[-24, 63], [-23, 60], [-25, 65], [-20, 69]], {name: 'line 1'});
-	 * var linestring2 = turf.lineString([[-14, 43], [-13, 40], [-15, 45], [-10, 49]], {name: 'line 2'});
-	 *
-	 * //=linestring1
-	 * //=linestring2
-	 */
-	function lineString(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    if (coordinates.length < 2) {
-	        throw new Error("coordinates must be an array of two or more positions");
-	    }
-	    var geom = {
-	        type: "LineString",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.lineString = lineString;
-	/**
-	 * Creates a {@link LineString} {@link FeatureCollection} from an Array of LineString coordinates.
-	 *
-	 * @name lineStrings
-	 * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north]
-	 * associated with the FeatureCollection
-	 * @param {string|number} [options.id] Identifier associated with the FeatureCollection
-	 * @returns {FeatureCollection<LineString>} LineString FeatureCollection
-	 * @example
-	 * var linestrings = turf.lineStrings([
-	 *   [[-24, 63], [-23, 60], [-25, 65], [-20, 69]],
-	 *   [[-14, 43], [-13, 40], [-15, 45], [-10, 49]]
-	 * ]);
-	 *
-	 * //=linestrings
-	 */
-	function lineStrings(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    return featureCollection(coordinates.map(function (coords) {
-	        return lineString(coords, properties);
-	    }), options);
-	}
-	exports.lineStrings = lineStrings;
-	/**
-	 * Takes one or more {@link Feature|Features} and creates a {@link FeatureCollection}.
-	 *
-	 * @name featureCollection
-	 * @param {Feature[]} features input features
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {FeatureCollection} FeatureCollection of Features
-	 * @example
-	 * var locationA = turf.point([-75.343, 39.984], {name: 'Location A'});
-	 * var locationB = turf.point([-75.833, 39.284], {name: 'Location B'});
-	 * var locationC = turf.point([-75.534, 39.123], {name: 'Location C'});
-	 *
-	 * var collection = turf.featureCollection([
-	 *   locationA,
-	 *   locationB,
-	 *   locationC
-	 * ]);
-	 *
-	 * //=collection
-	 */
-	function featureCollection(features, options) {
-	    if (options === void 0) { options = {}; }
-	    var fc = { type: "FeatureCollection" };
-	    if (options.id) {
-	        fc.id = options.id;
-	    }
-	    if (options.bbox) {
-	        fc.bbox = options.bbox;
-	    }
-	    fc.features = features;
-	    return fc;
-	}
-	exports.featureCollection = featureCollection;
-	/**
-	 * Creates a {@link Feature<MultiLineString>} based on a
-	 * coordinate array. Properties can be added optionally.
-	 *
-	 * @name multiLineString
-	 * @param {Array<Array<Array<number>>>} coordinates an array of LineStrings
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<MultiLineString>} a MultiLineString feature
-	 * @throws {Error} if no coordinates are passed
-	 * @example
-	 * var multiLine = turf.multiLineString([[[0,0],[10,10]]]);
-	 *
-	 * //=multiLine
-	 */
-	function multiLineString(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var geom = {
-	        type: "MultiLineString",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.multiLineString = multiLineString;
-	/**
-	 * Creates a {@link Feature<MultiPoint>} based on a
-	 * coordinate array. Properties can be added optionally.
-	 *
-	 * @name multiPoint
-	 * @param {Array<Array<number>>} coordinates an array of Positions
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<MultiPoint>} a MultiPoint feature
-	 * @throws {Error} if no coordinates are passed
-	 * @example
-	 * var multiPt = turf.multiPoint([[0,0],[10,10]]);
-	 *
-	 * //=multiPt
-	 */
-	function multiPoint(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var geom = {
-	        type: "MultiPoint",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.multiPoint = multiPoint;
-	/**
-	 * Creates a {@link Feature<MultiPolygon>} based on a
-	 * coordinate array. Properties can be added optionally.
-	 *
-	 * @name multiPolygon
-	 * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygons
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<MultiPolygon>} a multipolygon feature
-	 * @throws {Error} if no coordinates are passed
-	 * @example
-	 * var multiPoly = turf.multiPolygon([[[[0,0],[0,10],[10,10],[10,0],[0,0]]]]);
-	 *
-	 * //=multiPoly
-	 *
-	 */
-	function multiPolygon(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var geom = {
-	        type: "MultiPolygon",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.multiPolygon = multiPolygon;
-	/**
-	 * Creates a {@link Feature<GeometryCollection>} based on a
-	 * coordinate array. Properties can be added optionally.
-	 *
-	 * @name geometryCollection
-	 * @param {Array<Geometry>} geometries an array of GeoJSON Geometries
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<GeometryCollection>} a GeoJSON GeometryCollection Feature
-	 * @example
-	 * var pt = turf.geometry("Point", [100, 0]);
-	 * var line = turf.geometry("LineString", [[101, 0], [102, 1]]);
-	 * var collection = turf.geometryCollection([pt, line]);
-	 *
-	 * // => collection
-	 */
-	function geometryCollection(geometries, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var geom = {
-	        type: "GeometryCollection",
-	        geometries: geometries,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.geometryCollection = geometryCollection;
-	/**
-	 * Round number to precision
-	 *
-	 * @param {number} num Number
-	 * @param {number} [precision=0] Precision
-	 * @returns {number} rounded number
-	 * @example
-	 * turf.round(120.4321)
-	 * //=120
-	 *
-	 * turf.round(120.4321, 2)
-	 * //=120.43
-	 */
-	function round(num, precision) {
-	    if (precision === void 0) { precision = 0; }
-	    if (precision && !(precision >= 0)) {
-	        throw new Error("precision must be a positive number");
-	    }
-	    var multiplier = Math.pow(10, precision || 0);
-	    return Math.round(num * multiplier) / multiplier;
-	}
-	exports.round = round;
-	/**
-	 * Convert a distance measurement (assuming a spherical Earth) from radians to a more friendly unit.
-	 * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-	 *
-	 * @name radiansToLength
-	 * @param {number} radians in radians across the sphere
-	 * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-	 * meters, kilometres, kilometers.
-	 * @returns {number} distance
-	 */
-	function radiansToLength(radians, units) {
-	    if (units === void 0) { units = "kilometers"; }
-	    var factor = exports.factors[units];
-	    if (!factor) {
-	        throw new Error(units + " units is invalid");
-	    }
-	    return radians * factor;
-	}
-	exports.radiansToLength = radiansToLength;
-	/**
-	 * Convert a distance measurement (assuming a spherical Earth) from a real-world unit into radians
-	 * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-	 *
-	 * @name lengthToRadians
-	 * @param {number} distance in real units
-	 * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-	 * meters, kilometres, kilometers.
-	 * @returns {number} radians
-	 */
-	function lengthToRadians(distance, units) {
-	    if (units === void 0) { units = "kilometers"; }
-	    var factor = exports.factors[units];
-	    if (!factor) {
-	        throw new Error(units + " units is invalid");
-	    }
-	    return distance / factor;
-	}
-	exports.lengthToRadians = lengthToRadians;
-	/**
-	 * Convert a distance measurement (assuming a spherical Earth) from a real-world unit into degrees
-	 * Valid units: miles, nauticalmiles, inches, yards, meters, metres, centimeters, kilometres, feet
-	 *
-	 * @name lengthToDegrees
-	 * @param {number} distance in real units
-	 * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-	 * meters, kilometres, kilometers.
-	 * @returns {number} degrees
-	 */
-	function lengthToDegrees(distance, units) {
-	    return radiansToDegrees(lengthToRadians(distance, units));
-	}
-	exports.lengthToDegrees = lengthToDegrees;
-	/**
-	 * Converts any bearing angle from the north line direction (positive clockwise)
-	 * and returns an angle between 0-360 degrees (positive clockwise), 0 being the north line
-	 *
-	 * @name bearingToAzimuth
-	 * @param {number} bearing angle, between -180 and +180 degrees
-	 * @returns {number} angle between 0 and 360 degrees
-	 */
-	function bearingToAzimuth(bearing) {
-	    var angle = bearing % 360;
-	    if (angle < 0) {
-	        angle += 360;
-	    }
-	    return angle;
-	}
-	exports.bearingToAzimuth = bearingToAzimuth;
-	/**
-	 * Converts an angle in radians to degrees
-	 *
-	 * @name radiansToDegrees
-	 * @param {number} radians angle in radians
-	 * @returns {number} degrees between 0 and 360 degrees
-	 */
-	function radiansToDegrees(radians) {
-	    var degrees = radians % (2 * Math.PI);
-	    return degrees * 180 / Math.PI;
-	}
-	exports.radiansToDegrees = radiansToDegrees;
-	/**
-	 * Converts an angle in degrees to radians
-	 *
-	 * @name degreesToRadians
-	 * @param {number} degrees angle between 0 and 360 degrees
-	 * @returns {number} angle in radians
-	 */
-	function degreesToRadians(degrees) {
-	    var radians = degrees % 360;
-	    return radians * Math.PI / 180;
-	}
-	exports.degreesToRadians = degreesToRadians;
-	/**
-	 * Converts a length to the requested unit.
-	 * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-	 *
-	 * @param {number} length to be converted
-	 * @param {Units} [originalUnit="kilometers"] of the length
-	 * @param {Units} [finalUnit="kilometers"] returned unit
-	 * @returns {number} the converted length
-	 */
-	function convertLength(length, originalUnit, finalUnit) {
-	    if (originalUnit === void 0) { originalUnit = "kilometers"; }
-	    if (finalUnit === void 0) { finalUnit = "kilometers"; }
-	    if (!(length >= 0)) {
-	        throw new Error("length must be a positive number");
-	    }
-	    return radiansToLength(lengthToRadians(length, originalUnit), finalUnit);
-	}
-	exports.convertLength = convertLength;
-	/**
-	 * Converts a area to the requested unit.
-	 * Valid units: kilometers, kilometres, meters, metres, centimetres, millimeters, acres, miles, yards, feet, inches
-	 * @param {number} area to be converted
-	 * @param {Units} [originalUnit="meters"] of the distance
-	 * @param {Units} [finalUnit="kilometers"] returned unit
-	 * @returns {number} the converted distance
-	 */
-	function convertArea(area, originalUnit, finalUnit) {
-	    if (originalUnit === void 0) { originalUnit = "meters"; }
-	    if (finalUnit === void 0) { finalUnit = "kilometers"; }
-	    if (!(area >= 0)) {
-	        throw new Error("area must be a positive number");
-	    }
-	    var startFactor = exports.areaFactors[originalUnit];
-	    if (!startFactor) {
-	        throw new Error("invalid original units");
-	    }
-	    var finalFactor = exports.areaFactors[finalUnit];
-	    if (!finalFactor) {
-	        throw new Error("invalid final units");
-	    }
-	    return (area / startFactor) * finalFactor;
-	}
-	exports.convertArea = convertArea;
-	/**
-	 * isNumber
-	 *
-	 * @param {*} num Number to validate
-	 * @returns {boolean} true/false
-	 * @example
-	 * turf.isNumber(123)
-	 * //=true
-	 * turf.isNumber('foo')
-	 * //=false
-	 */
-	function isNumber(num) {
-	    return !isNaN(num) && num !== null && !Array.isArray(num) && !/^\s*$/.test(num);
-	}
-	exports.isNumber = isNumber;
-	/**
-	 * isObject
-	 *
-	 * @param {*} input variable to validate
-	 * @returns {boolean} true/false
-	 * @example
-	 * turf.isObject({elevation: 10})
-	 * //=true
-	 * turf.isObject('foo')
-	 * //=false
-	 */
-	function isObject(input) {
-	    return (!!input) && (input.constructor === Object);
-	}
-	exports.isObject = isObject;
-	/**
-	 * Validate BBox
-	 *
-	 * @private
-	 * @param {Array<number>} bbox BBox to validate
-	 * @returns {void}
-	 * @throws Error if BBox is not valid
-	 * @example
-	 * validateBBox([-180, -40, 110, 50])
-	 * //=OK
-	 * validateBBox([-180, -40])
-	 * //=Error
-	 * validateBBox('Foo')
-	 * //=Error
-	 * validateBBox(5)
-	 * //=Error
-	 * validateBBox(null)
-	 * //=Error
-	 * validateBBox(undefined)
-	 * //=Error
-	 */
-	function validateBBox(bbox) {
-	    if (!bbox) {
-	        throw new Error("bbox is required");
-	    }
-	    if (!Array.isArray(bbox)) {
-	        throw new Error("bbox must be an Array");
-	    }
-	    if (bbox.length !== 4 && bbox.length !== 6) {
-	        throw new Error("bbox must be an Array of 4 or 6 numbers");
-	    }
-	    bbox.forEach(function (num) {
-	        if (!isNumber(num)) {
-	            throw new Error("bbox must only contain numbers");
+
+	        return function () {
+	          var args = arguments;
+
+	          switch (args.length) {
+	            case 0:
+	              return !predicate.call(this);
+
+	            case 1:
+	              return !predicate.call(this, args[0]);
+
+	            case 2:
+	              return !predicate.call(this, args[0], args[1]);
+
+	            case 3:
+	              return !predicate.call(this, args[0], args[1], args[2]);
+	          }
+
+	          return !predicate.apply(this, args);
+	        };
+	      }
+	      /**
+	       * Creates a function that is restricted to invoking `func` once. Repeat calls
+	       * to the function return the value of the first invocation. The `func` is
+	       * invoked with the `this` binding and arguments of the created function.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {Function} func The function to restrict.
+	       * @returns {Function} Returns the new restricted function.
+	       * @example
+	       *
+	       * var initialize = _.once(createApplication);
+	       * initialize();
+	       * initialize();
+	       * // => `createApplication` is invoked once
+	       */
+
+
+	      function once(func) {
+	        return before(2, func);
+	      }
+	      /**
+	       * Creates a function that invokes `func` with its arguments transformed.
+	       *
+	       * @static
+	       * @since 4.0.0
+	       * @memberOf _
+	       * @category Function
+	       * @param {Function} func The function to wrap.
+	       * @param {...(Function|Function[])} [transforms=[_.identity]]
+	       *  The argument transforms.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * function doubled(n) {
+	       *   return n * 2;
+	       * }
+	       *
+	       * function square(n) {
+	       *   return n * n;
+	       * }
+	       *
+	       * var func = _.overArgs(function(x, y) {
+	       *   return [x, y];
+	       * }, [square, doubled]);
+	       *
+	       * func(9, 3);
+	       * // => [81, 6]
+	       *
+	       * func(10, 5);
+	       * // => [100, 10]
+	       */
+
+
+	      var overArgs = castRest(function (func, transforms) {
+	        transforms = transforms.length == 1 && isArray(transforms[0]) ? arrayMap(transforms[0], baseUnary(getIteratee())) : arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));
+	        var funcsLength = transforms.length;
+	        return baseRest(function (args) {
+	          var index = -1,
+	              length = nativeMin(args.length, funcsLength);
+
+	          while (++index < length) {
+	            args[index] = transforms[index].call(this, args[index]);
+	          }
+
+	          return apply(func, this, args);
+	        });
+	      });
+	      /**
+	       * Creates a function that invokes `func` with `partials` prepended to the
+	       * arguments it receives. This method is like `_.bind` except it does **not**
+	       * alter the `this` binding.
+	       *
+	       * The `_.partial.placeholder` value, which defaults to `_` in monolithic
+	       * builds, may be used as a placeholder for partially applied arguments.
+	       *
+	       * **Note:** This method doesn't set the "length" property of partially
+	       * applied functions.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.2.0
+	       * @category Function
+	       * @param {Function} func The function to partially apply arguments to.
+	       * @param {...*} [partials] The arguments to be partially applied.
+	       * @returns {Function} Returns the new partially applied function.
+	       * @example
+	       *
+	       * function greet(greeting, name) {
+	       *   return greeting + ' ' + name;
+	       * }
+	       *
+	       * var sayHelloTo = _.partial(greet, 'hello');
+	       * sayHelloTo('fred');
+	       * // => 'hello fred'
+	       *
+	       * // Partially applied with placeholders.
+	       * var greetFred = _.partial(greet, _, 'fred');
+	       * greetFred('hi');
+	       * // => 'hi fred'
+	       */
+
+	      var partial = baseRest(function (func, partials) {
+	        var holders = replaceHolders(partials, getHolder(partial));
+	        return createWrap(func, WRAP_PARTIAL_FLAG, undefined$1, partials, holders);
+	      });
+	      /**
+	       * This method is like `_.partial` except that partially applied arguments
+	       * are appended to the arguments it receives.
+	       *
+	       * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
+	       * builds, may be used as a placeholder for partially applied arguments.
+	       *
+	       * **Note:** This method doesn't set the "length" property of partially
+	       * applied functions.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.0.0
+	       * @category Function
+	       * @param {Function} func The function to partially apply arguments to.
+	       * @param {...*} [partials] The arguments to be partially applied.
+	       * @returns {Function} Returns the new partially applied function.
+	       * @example
+	       *
+	       * function greet(greeting, name) {
+	       *   return greeting + ' ' + name;
+	       * }
+	       *
+	       * var greetFred = _.partialRight(greet, 'fred');
+	       * greetFred('hi');
+	       * // => 'hi fred'
+	       *
+	       * // Partially applied with placeholders.
+	       * var sayHelloTo = _.partialRight(greet, 'hello', _);
+	       * sayHelloTo('fred');
+	       * // => 'hello fred'
+	       */
+
+	      var partialRight = baseRest(function (func, partials) {
+	        var holders = replaceHolders(partials, getHolder(partialRight));
+	        return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined$1, partials, holders);
+	      });
+	      /**
+	       * Creates a function that invokes `func` with arguments arranged according
+	       * to the specified `indexes` where the argument value at the first index is
+	       * provided as the first argument, the argument value at the second index is
+	       * provided as the second argument, and so on.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Function
+	       * @param {Function} func The function to rearrange arguments for.
+	       * @param {...(number|number[])} indexes The arranged argument indexes.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * var rearged = _.rearg(function(a, b, c) {
+	       *   return [a, b, c];
+	       * }, [2, 0, 1]);
+	       *
+	       * rearged('b', 'c', 'a')
+	       * // => ['a', 'b', 'c']
+	       */
+
+	      var rearg = flatRest(function (func, indexes) {
+	        return createWrap(func, WRAP_REARG_FLAG, undefined$1, undefined$1, undefined$1, indexes);
+	      });
+	      /**
+	       * Creates a function that invokes `func` with the `this` binding of the
+	       * created function and arguments from `start` and beyond provided as
+	       * an array.
+	       *
+	       * **Note:** This method is based on the
+	       * [rest parameter](https://mdn.io/rest_parameters).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Function
+	       * @param {Function} func The function to apply a rest parameter to.
+	       * @param {number} [start=func.length-1] The start position of the rest parameter.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * var say = _.rest(function(what, names) {
+	       *   return what + ' ' + _.initial(names).join(', ') +
+	       *     (_.size(names) > 1 ? ', & ' : '') + _.last(names);
+	       * });
+	       *
+	       * say('hello', 'fred', 'barney', 'pebbles');
+	       * // => 'hello fred, barney, & pebbles'
+	       */
+
+	      function rest(func, start) {
+	        if (typeof func != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
 	        }
-	    });
-	}
-	exports.validateBBox = validateBBox;
-	/**
-	 * Validate Id
-	 *
-	 * @private
-	 * @param {string|number} id Id to validate
-	 * @returns {void}
-	 * @throws Error if Id is not valid
-	 * @example
-	 * validateId([-180, -40, 110, 50])
-	 * //=Error
-	 * validateId([-180, -40])
-	 * //=Error
-	 * validateId('Foo')
-	 * //=OK
-	 * validateId(5)
-	 * //=OK
-	 * validateId(null)
-	 * //=Error
-	 * validateId(undefined)
-	 * //=Error
-	 */
-	function validateId(id) {
-	    if (!id) {
-	        throw new Error("id is required");
-	    }
-	    if (["string", "number"].indexOf(typeof id) === -1) {
-	        throw new Error("id must be a number or a string");
-	    }
-	}
-	exports.validateId = validateId;
-	// Deprecated methods
-	function radians2degrees() {
-	    throw new Error("method has been renamed to `radiansToDegrees`");
-	}
-	exports.radians2degrees = radians2degrees;
-	function degrees2radians() {
-	    throw new Error("method has been renamed to `degreesToRadians`");
-	}
-	exports.degrees2radians = degrees2radians;
-	function distanceToDegrees() {
-	    throw new Error("method has been renamed to `lengthToDegrees`");
-	}
-	exports.distanceToDegrees = distanceToDegrees;
-	function distanceToRadians() {
-	    throw new Error("method has been renamed to `lengthToRadians`");
-	}
-	exports.distanceToRadians = distanceToRadians;
-	function radiansToDistance() {
-	    throw new Error("method has been renamed to `radiansToLength`");
-	}
-	exports.radiansToDistance = radiansToDistance;
-	function bearingToAngle() {
-	    throw new Error("method has been renamed to `bearingToAzimuth`");
-	}
-	exports.bearingToAngle = bearingToAngle;
-	function convertDistance() {
-	    throw new Error("method has been renamed to `convertLength`");
-	}
-	exports.convertDistance = convertDistance;
-	});
 
-	var invariant = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
+	        start = start === undefined$1 ? start : toInteger(start);
+	        return baseRest(func, start);
+	      }
+	      /**
+	       * Creates a function that invokes `func` with the `this` binding of the
+	       * create function and an array of arguments much like
+	       * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).
+	       *
+	       * **Note:** This method is based on the
+	       * [spread operator](https://mdn.io/spread_operator).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.2.0
+	       * @category Function
+	       * @param {Function} func The function to spread arguments over.
+	       * @param {number} [start=0] The start position of the spread.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * var say = _.spread(function(who, what) {
+	       *   return who + ' says ' + what;
+	       * });
+	       *
+	       * say(['fred', 'hello']);
+	       * // => 'fred says hello'
+	       *
+	       * var numbers = Promise.all([
+	       *   Promise.resolve(40),
+	       *   Promise.resolve(36)
+	       * ]);
+	       *
+	       * numbers.then(_.spread(function(x, y) {
+	       *   return x + y;
+	       * }));
+	       * // => a Promise of 76
+	       */
 
-	/**
-	 * Unwrap a coordinate from a Point Feature, Geometry or a single coordinate.
-	 *
-	 * @name getCoord
-	 * @param {Array<number>|Geometry<Point>|Feature<Point>} coord GeoJSON Point or an Array of numbers
-	 * @returns {Array<number>} coordinates
-	 * @example
-	 * var pt = turf.point([10, 10]);
-	 *
-	 * var coord = turf.getCoord(pt);
-	 * //= [10, 10]
-	 */
-	function getCoord(coord) {
-	    if (!coord) {
-	        throw new Error("coord is required");
-	    }
-	    if (!Array.isArray(coord)) {
-	        if (coord.type === "Feature" && coord.geometry !== null && coord.geometry.type === "Point") {
-	            return coord.geometry.coordinates;
+
+	      function spread(func, start) {
+	        if (typeof func != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
 	        }
-	        if (coord.type === "Point") {
-	            return coord.coordinates;
+
+	        start = start == null ? 0 : nativeMax(toInteger(start), 0);
+	        return baseRest(function (args) {
+	          var array = args[start],
+	              otherArgs = castSlice(args, 0, start);
+
+	          if (array) {
+	            arrayPush(otherArgs, array);
+	          }
+
+	          return apply(func, this, otherArgs);
+	        });
+	      }
+	      /**
+	       * Creates a throttled function that only invokes `func` at most once per
+	       * every `wait` milliseconds. The throttled function comes with a `cancel`
+	       * method to cancel delayed `func` invocations and a `flush` method to
+	       * immediately invoke them. Provide `options` to indicate whether `func`
+	       * should be invoked on the leading and/or trailing edge of the `wait`
+	       * timeout. The `func` is invoked with the last arguments provided to the
+	       * throttled function. Subsequent calls to the throttled function return the
+	       * result of the last `func` invocation.
+	       *
+	       * **Note:** If `leading` and `trailing` options are `true`, `func` is
+	       * invoked on the trailing edge of the timeout only if the throttled function
+	       * is invoked more than once during the `wait` timeout.
+	       *
+	       * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+	       * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+	       *
+	       * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+	       * for details over the differences between `_.throttle` and `_.debounce`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {Function} func The function to throttle.
+	       * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
+	       * @param {Object} [options={}] The options object.
+	       * @param {boolean} [options.leading=true]
+	       *  Specify invoking on the leading edge of the timeout.
+	       * @param {boolean} [options.trailing=true]
+	       *  Specify invoking on the trailing edge of the timeout.
+	       * @returns {Function} Returns the new throttled function.
+	       * @example
+	       *
+	       * // Avoid excessively updating the position while scrolling.
+	       * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
+	       *
+	       * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
+	       * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
+	       * jQuery(element).on('click', throttled);
+	       *
+	       * // Cancel the trailing throttled invocation.
+	       * jQuery(window).on('popstate', throttled.cancel);
+	       */
+
+
+	      function throttle(func, wait, options) {
+	        var leading = true,
+	            trailing = true;
+
+	        if (typeof func != 'function') {
+	          throw new TypeError(FUNC_ERROR_TEXT);
 	        }
-	    }
-	    if (Array.isArray(coord) && coord.length >= 2 && !Array.isArray(coord[0]) && !Array.isArray(coord[1])) {
-	        return coord;
-	    }
-	    throw new Error("coord must be GeoJSON Point or an Array of numbers");
-	}
-	exports.getCoord = getCoord;
-	/**
-	 * Unwrap coordinates from a Feature, Geometry Object or an Array
-	 *
-	 * @name getCoords
-	 * @param {Array<any>|Geometry|Feature} coords Feature, Geometry Object or an Array
-	 * @returns {Array<any>} coordinates
-	 * @example
-	 * var poly = turf.polygon([[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]);
-	 *
-	 * var coords = turf.getCoords(poly);
-	 * //= [[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]
-	 */
-	function getCoords(coords) {
-	    if (Array.isArray(coords)) {
-	        return coords;
-	    }
-	    // Feature
-	    if (coords.type === "Feature") {
-	        if (coords.geometry !== null) {
-	            return coords.geometry.coordinates;
+
+	        if (isObject(options)) {
+	          leading = 'leading' in options ? !!options.leading : leading;
+	          trailing = 'trailing' in options ? !!options.trailing : trailing;
 	        }
-	    }
-	    else {
-	        // Geometry
-	        if (coords.coordinates) {
-	            return coords.coordinates;
+
+	        return debounce(func, wait, {
+	          'leading': leading,
+	          'maxWait': wait,
+	          'trailing': trailing
+	        });
+	      }
+	      /**
+	       * Creates a function that accepts up to one argument, ignoring any
+	       * additional arguments.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Function
+	       * @param {Function} func The function to cap arguments for.
+	       * @returns {Function} Returns the new capped function.
+	       * @example
+	       *
+	       * _.map(['6', '8', '10'], _.unary(parseInt));
+	       * // => [6, 8, 10]
+	       */
+
+
+	      function unary(func) {
+	        return ary(func, 1);
+	      }
+	      /**
+	       * Creates a function that provides `value` to `wrapper` as its first
+	       * argument. Any additional arguments provided to the function are appended
+	       * to those provided to the `wrapper`. The wrapper is invoked with the `this`
+	       * binding of the created function.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Function
+	       * @param {*} value The value to wrap.
+	       * @param {Function} [wrapper=identity] The wrapper function.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * var p = _.wrap(_.escape, function(func, text) {
+	       *   return '<p>' + func(text) + '</p>';
+	       * });
+	       *
+	       * p('fred, barney, & pebbles');
+	       * // => '<p>fred, barney, &amp; pebbles</p>'
+	       */
+
+
+	      function wrap(value, wrapper) {
+	        return partial(castFunction(wrapper), value);
+	      }
+	      /*------------------------------------------------------------------------*/
+
+	      /**
+	       * Casts `value` as an array if it's not one.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.4.0
+	       * @category Lang
+	       * @param {*} value The value to inspect.
+	       * @returns {Array} Returns the cast array.
+	       * @example
+	       *
+	       * _.castArray(1);
+	       * // => [1]
+	       *
+	       * _.castArray({ 'a': 1 });
+	       * // => [{ 'a': 1 }]
+	       *
+	       * _.castArray('abc');
+	       * // => ['abc']
+	       *
+	       * _.castArray(null);
+	       * // => [null]
+	       *
+	       * _.castArray(undefined);
+	       * // => [undefined]
+	       *
+	       * _.castArray();
+	       * // => []
+	       *
+	       * var array = [1, 2, 3];
+	       * console.log(_.castArray(array) === array);
+	       * // => true
+	       */
+
+
+	      function castArray() {
+	        if (!arguments.length) {
+	          return [];
 	        }
-	    }
-	    throw new Error("coords must be GeoJSON Feature, Geometry Object or an Array");
-	}
-	exports.getCoords = getCoords;
-	/**
-	 * Checks if coordinates contains a number
-	 *
-	 * @name containsNumber
-	 * @param {Array<any>} coordinates GeoJSON Coordinates
-	 * @returns {boolean} true if Array contains a number
-	 */
-	function containsNumber(coordinates) {
-	    if (coordinates.length > 1 && helpers$1.isNumber(coordinates[0]) && helpers$1.isNumber(coordinates[1])) {
+
+	        var value = arguments[0];
+	        return isArray(value) ? value : [value];
+	      }
+	      /**
+	       * Creates a shallow clone of `value`.
+	       *
+	       * **Note:** This method is loosely based on the
+	       * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
+	       * and supports cloning arrays, array buffers, booleans, date objects, maps,
+	       * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
+	       * arrays. The own enumerable properties of `arguments` objects are cloned
+	       * as plain objects. An empty object is returned for uncloneable values such
+	       * as error objects, functions, DOM nodes, and WeakMaps.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to clone.
+	       * @returns {*} Returns the cloned value.
+	       * @see _.cloneDeep
+	       * @example
+	       *
+	       * var objects = [{ 'a': 1 }, { 'b': 2 }];
+	       *
+	       * var shallow = _.clone(objects);
+	       * console.log(shallow[0] === objects[0]);
+	       * // => true
+	       */
+
+
+	      function clone(value) {
+	        return baseClone(value, CLONE_SYMBOLS_FLAG);
+	      }
+	      /**
+	       * This method is like `_.clone` except that it accepts `customizer` which
+	       * is invoked to produce the cloned value. If `customizer` returns `undefined`,
+	       * cloning is handled by the method instead. The `customizer` is invoked with
+	       * up to four arguments; (value [, index|key, object, stack]).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to clone.
+	       * @param {Function} [customizer] The function to customize cloning.
+	       * @returns {*} Returns the cloned value.
+	       * @see _.cloneDeepWith
+	       * @example
+	       *
+	       * function customizer(value) {
+	       *   if (_.isElement(value)) {
+	       *     return value.cloneNode(false);
+	       *   }
+	       * }
+	       *
+	       * var el = _.cloneWith(document.body, customizer);
+	       *
+	       * console.log(el === document.body);
+	       * // => false
+	       * console.log(el.nodeName);
+	       * // => 'BODY'
+	       * console.log(el.childNodes.length);
+	       * // => 0
+	       */
+
+
+	      function cloneWith(value, customizer) {
+	        customizer = typeof customizer == 'function' ? customizer : undefined$1;
+	        return baseClone(value, CLONE_SYMBOLS_FLAG, customizer);
+	      }
+	      /**
+	       * This method is like `_.clone` except that it recursively clones `value`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.0.0
+	       * @category Lang
+	       * @param {*} value The value to recursively clone.
+	       * @returns {*} Returns the deep cloned value.
+	       * @see _.clone
+	       * @example
+	       *
+	       * var objects = [{ 'a': 1 }, { 'b': 2 }];
+	       *
+	       * var deep = _.cloneDeep(objects);
+	       * console.log(deep[0] === objects[0]);
+	       * // => false
+	       */
+
+
+	      function cloneDeep(value) {
+	        return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);
+	      }
+	      /**
+	       * This method is like `_.cloneWith` except that it recursively clones `value`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to recursively clone.
+	       * @param {Function} [customizer] The function to customize cloning.
+	       * @returns {*} Returns the deep cloned value.
+	       * @see _.cloneWith
+	       * @example
+	       *
+	       * function customizer(value) {
+	       *   if (_.isElement(value)) {
+	       *     return value.cloneNode(true);
+	       *   }
+	       * }
+	       *
+	       * var el = _.cloneDeepWith(document.body, customizer);
+	       *
+	       * console.log(el === document.body);
+	       * // => false
+	       * console.log(el.nodeName);
+	       * // => 'BODY'
+	       * console.log(el.childNodes.length);
+	       * // => 20
+	       */
+
+
+	      function cloneDeepWith(value, customizer) {
+	        customizer = typeof customizer == 'function' ? customizer : undefined$1;
+	        return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);
+	      }
+	      /**
+	       * Checks if `object` conforms to `source` by invoking the predicate
+	       * properties of `source` with the corresponding property values of `object`.
+	       *
+	       * **Note:** This method is equivalent to `_.conforms` when `source` is
+	       * partially applied.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.14.0
+	       * @category Lang
+	       * @param {Object} object The object to inspect.
+	       * @param {Object} source The object of property predicates to conform to.
+	       * @returns {boolean} Returns `true` if `object` conforms, else `false`.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': 2 };
+	       *
+	       * _.conformsTo(object, { 'b': function(n) { return n > 1; } });
+	       * // => true
+	       *
+	       * _.conformsTo(object, { 'b': function(n) { return n > 2; } });
+	       * // => false
+	       */
+
+
+	      function conformsTo(object, source) {
+	        return source == null || baseConformsTo(object, source, keys(source));
+	      }
+	      /**
+	       * Performs a
+	       * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+	       * comparison between two values to determine if they are equivalent.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+	       * @example
+	       *
+	       * var object = { 'a': 1 };
+	       * var other = { 'a': 1 };
+	       *
+	       * _.eq(object, object);
+	       * // => true
+	       *
+	       * _.eq(object, other);
+	       * // => false
+	       *
+	       * _.eq('a', 'a');
+	       * // => true
+	       *
+	       * _.eq('a', Object('a'));
+	       * // => false
+	       *
+	       * _.eq(NaN, NaN);
+	       * // => true
+	       */
+
+
+	      function eq(value, other) {
+	        return value === other || value !== value && other !== other;
+	      }
+	      /**
+	       * Checks if `value` is greater than `other`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.9.0
+	       * @category Lang
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if `value` is greater than `other`,
+	       *  else `false`.
+	       * @see _.lt
+	       * @example
+	       *
+	       * _.gt(3, 1);
+	       * // => true
+	       *
+	       * _.gt(3, 3);
+	       * // => false
+	       *
+	       * _.gt(1, 3);
+	       * // => false
+	       */
+
+
+	      var gt = createRelationalOperation(baseGt);
+	      /**
+	       * Checks if `value` is greater than or equal to `other`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.9.0
+	       * @category Lang
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if `value` is greater than or equal to
+	       *  `other`, else `false`.
+	       * @see _.lte
+	       * @example
+	       *
+	       * _.gte(3, 1);
+	       * // => true
+	       *
+	       * _.gte(3, 3);
+	       * // => true
+	       *
+	       * _.gte(1, 3);
+	       * // => false
+	       */
+
+	      var gte = createRelationalOperation(function (value, other) {
+	        return value >= other;
+	      });
+	      /**
+	       * Checks if `value` is likely an `arguments` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+	       *  else `false`.
+	       * @example
+	       *
+	       * _.isArguments(function() { return arguments; }());
+	       * // => true
+	       *
+	       * _.isArguments([1, 2, 3]);
+	       * // => false
+	       */
+
+	      var isArguments = baseIsArguments(function () {
+	        return arguments;
+	      }()) ? baseIsArguments : function (value) {
+	        return isObjectLike(value) && hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee');
+	      };
+	      /**
+	       * Checks if `value` is classified as an `Array` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+	       * @example
+	       *
+	       * _.isArray([1, 2, 3]);
+	       * // => true
+	       *
+	       * _.isArray(document.body.children);
+	       * // => false
+	       *
+	       * _.isArray('abc');
+	       * // => false
+	       *
+	       * _.isArray(_.noop);
+	       * // => false
+	       */
+
+	      var isArray = Array.isArray;
+	      /**
+	       * Checks if `value` is classified as an `ArrayBuffer` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.3.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
+	       * @example
+	       *
+	       * _.isArrayBuffer(new ArrayBuffer(2));
+	       * // => true
+	       *
+	       * _.isArrayBuffer(new Array(2));
+	       * // => false
+	       */
+
+	      var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;
+	      /**
+	       * Checks if `value` is array-like. A value is considered array-like if it's
+	       * not a function and has a `value.length` that's an integer greater than or
+	       * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+	       * @example
+	       *
+	       * _.isArrayLike([1, 2, 3]);
+	       * // => true
+	       *
+	       * _.isArrayLike(document.body.children);
+	       * // => true
+	       *
+	       * _.isArrayLike('abc');
+	       * // => true
+	       *
+	       * _.isArrayLike(_.noop);
+	       * // => false
+	       */
+
+	      function isArrayLike(value) {
+	        return value != null && isLength(value.length) && !isFunction(value);
+	      }
+	      /**
+	       * This method is like `_.isArrayLike` except that it also checks if `value`
+	       * is an object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an array-like object,
+	       *  else `false`.
+	       * @example
+	       *
+	       * _.isArrayLikeObject([1, 2, 3]);
+	       * // => true
+	       *
+	       * _.isArrayLikeObject(document.body.children);
+	       * // => true
+	       *
+	       * _.isArrayLikeObject('abc');
+	       * // => false
+	       *
+	       * _.isArrayLikeObject(_.noop);
+	       * // => false
+	       */
+
+
+	      function isArrayLikeObject(value) {
+	        return isObjectLike(value) && isArrayLike(value);
+	      }
+	      /**
+	       * Checks if `value` is classified as a boolean primitive or object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
+	       * @example
+	       *
+	       * _.isBoolean(false);
+	       * // => true
+	       *
+	       * _.isBoolean(null);
+	       * // => false
+	       */
+
+
+	      function isBoolean(value) {
+	        return value === true || value === false || isObjectLike(value) && baseGetTag(value) == boolTag;
+	      }
+	      /**
+	       * Checks if `value` is a buffer.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.3.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
+	       * @example
+	       *
+	       * _.isBuffer(new Buffer(2));
+	       * // => true
+	       *
+	       * _.isBuffer(new Uint8Array(2));
+	       * // => false
+	       */
+
+
+	      var isBuffer = nativeIsBuffer || stubFalse;
+	      /**
+	       * Checks if `value` is classified as a `Date` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
+	       * @example
+	       *
+	       * _.isDate(new Date);
+	       * // => true
+	       *
+	       * _.isDate('Mon April 23 2012');
+	       * // => false
+	       */
+
+	      var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;
+	      /**
+	       * Checks if `value` is likely a DOM element.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
+	       * @example
+	       *
+	       * _.isElement(document.body);
+	       * // => true
+	       *
+	       * _.isElement('<body>');
+	       * // => false
+	       */
+
+	      function isElement(value) {
+	        return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);
+	      }
+	      /**
+	       * Checks if `value` is an empty object, collection, map, or set.
+	       *
+	       * Objects are considered empty if they have no own enumerable string keyed
+	       * properties.
+	       *
+	       * Array-like values such as `arguments` objects, arrays, buffers, strings, or
+	       * jQuery-like collections are considered empty if they have a `length` of `0`.
+	       * Similarly, maps and sets are considered empty if they have a `size` of `0`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is empty, else `false`.
+	       * @example
+	       *
+	       * _.isEmpty(null);
+	       * // => true
+	       *
+	       * _.isEmpty(true);
+	       * // => true
+	       *
+	       * _.isEmpty(1);
+	       * // => true
+	       *
+	       * _.isEmpty([1, 2, 3]);
+	       * // => false
+	       *
+	       * _.isEmpty({ 'a': 1 });
+	       * // => false
+	       */
+
+
+	      function isEmpty(value) {
+	        if (value == null) {
+	          return true;
+	        }
+
+	        if (isArrayLike(value) && (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' || isBuffer(value) || isTypedArray(value) || isArguments(value))) {
+	          return !value.length;
+	        }
+
+	        var tag = getTag(value);
+
+	        if (tag == mapTag || tag == setTag) {
+	          return !value.size;
+	        }
+
+	        if (isPrototype(value)) {
+	          return !baseKeys(value).length;
+	        }
+
+	        for (var key in value) {
+	          if (hasOwnProperty.call(value, key)) {
+	            return false;
+	          }
+	        }
+
 	        return true;
-	    }
-	    if (Array.isArray(coordinates[0]) && coordinates[0].length) {
-	        return containsNumber(coordinates[0]);
-	    }
-	    throw new Error("coordinates must only contain numbers");
-	}
-	exports.containsNumber = containsNumber;
-	/**
-	 * Enforce expectations about types of GeoJSON objects for Turf.
-	 *
-	 * @name geojsonType
-	 * @param {GeoJSON} value any GeoJSON object
-	 * @param {string} type expected GeoJSON type
-	 * @param {string} name name of calling function
-	 * @throws {Error} if value is not the expected type.
-	 */
-	function geojsonType(value, type, name) {
-	    if (!type || !name) {
-	        throw new Error("type and name required");
-	    }
-	    if (!value || value.type !== type) {
-	        throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + value.type);
-	    }
-	}
-	exports.geojsonType = geojsonType;
-	/**
-	 * Enforce expectations about types of {@link Feature} inputs for Turf.
-	 * Internally this uses {@link geojsonType} to judge geometry types.
-	 *
-	 * @name featureOf
-	 * @param {Feature} feature a feature with an expected geometry type
-	 * @param {string} type expected GeoJSON type
-	 * @param {string} name name of calling function
-	 * @throws {Error} error if value is not the expected type.
-	 */
-	function featureOf(feature, type, name) {
-	    if (!feature) {
-	        throw new Error("No feature passed");
-	    }
-	    if (!name) {
-	        throw new Error(".featureOf() requires a name");
-	    }
-	    if (!feature || feature.type !== "Feature" || !feature.geometry) {
-	        throw new Error("Invalid input to " + name + ", Feature with geometry required");
-	    }
-	    if (!feature.geometry || feature.geometry.type !== type) {
-	        throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
-	    }
-	}
-	exports.featureOf = featureOf;
-	/**
-	 * Enforce expectations about types of {@link FeatureCollection} inputs for Turf.
-	 * Internally this uses {@link geojsonType} to judge geometry types.
-	 *
-	 * @name collectionOf
-	 * @param {FeatureCollection} featureCollection a FeatureCollection for which features will be judged
-	 * @param {string} type expected GeoJSON type
-	 * @param {string} name name of calling function
-	 * @throws {Error} if value is not the expected type.
-	 */
-	function collectionOf(featureCollection, type, name) {
-	    if (!featureCollection) {
-	        throw new Error("No featureCollection passed");
-	    }
-	    if (!name) {
-	        throw new Error(".collectionOf() requires a name");
-	    }
-	    if (!featureCollection || featureCollection.type !== "FeatureCollection") {
-	        throw new Error("Invalid input to " + name + ", FeatureCollection required");
-	    }
-	    for (var _i = 0, _a = featureCollection.features; _i < _a.length; _i++) {
-	        var feature = _a[_i];
-	        if (!feature || feature.type !== "Feature" || !feature.geometry) {
-	            throw new Error("Invalid input to " + name + ", Feature with geometry required");
+	      }
+	      /**
+	       * Performs a deep comparison between two values to determine if they are
+	       * equivalent.
+	       *
+	       * **Note:** This method supports comparing arrays, array buffers, booleans,
+	       * date objects, error objects, maps, numbers, `Object` objects, regexes,
+	       * sets, strings, symbols, and typed arrays. `Object` objects are compared
+	       * by their own, not inherited, enumerable properties. Functions and DOM
+	       * nodes are compared by strict equality, i.e. `===`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+	       * @example
+	       *
+	       * var object = { 'a': 1 };
+	       * var other = { 'a': 1 };
+	       *
+	       * _.isEqual(object, other);
+	       * // => true
+	       *
+	       * object === other;
+	       * // => false
+	       */
+
+
+	      function isEqual(value, other) {
+	        return baseIsEqual(value, other);
+	      }
+	      /**
+	       * This method is like `_.isEqual` except that it accepts `customizer` which
+	       * is invoked to compare values. If `customizer` returns `undefined`, comparisons
+	       * are handled by the method instead. The `customizer` is invoked with up to
+	       * six arguments: (objValue, othValue [, index|key, object, other, stack]).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @param {Function} [customizer] The function to customize comparisons.
+	       * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+	       * @example
+	       *
+	       * function isGreeting(value) {
+	       *   return /^h(?:i|ello)$/.test(value);
+	       * }
+	       *
+	       * function customizer(objValue, othValue) {
+	       *   if (isGreeting(objValue) && isGreeting(othValue)) {
+	       *     return true;
+	       *   }
+	       * }
+	       *
+	       * var array = ['hello', 'goodbye'];
+	       * var other = ['hi', 'goodbye'];
+	       *
+	       * _.isEqualWith(array, other, customizer);
+	       * // => true
+	       */
+
+
+	      function isEqualWith(value, other, customizer) {
+	        customizer = typeof customizer == 'function' ? customizer : undefined$1;
+	        var result = customizer ? customizer(value, other) : undefined$1;
+	        return result === undefined$1 ? baseIsEqual(value, other, undefined$1, customizer) : !!result;
+	      }
+	      /**
+	       * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
+	       * `SyntaxError`, `TypeError`, or `URIError` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
+	       * @example
+	       *
+	       * _.isError(new Error);
+	       * // => true
+	       *
+	       * _.isError(Error);
+	       * // => false
+	       */
+
+
+	      function isError(value) {
+	        if (!isObjectLike(value)) {
+	          return false;
+	        }
+
+	        var tag = baseGetTag(value);
+	        return tag == errorTag || tag == domExcTag || typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value);
+	      }
+	      /**
+	       * Checks if `value` is a finite primitive number.
+	       *
+	       * **Note:** This method is based on
+	       * [`Number.isFinite`](https://mdn.io/Number/isFinite).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
+	       * @example
+	       *
+	       * _.isFinite(3);
+	       * // => true
+	       *
+	       * _.isFinite(Number.MIN_VALUE);
+	       * // => true
+	       *
+	       * _.isFinite(Infinity);
+	       * // => false
+	       *
+	       * _.isFinite('3');
+	       * // => false
+	       */
+
+
+	      function isFinite(value) {
+	        return typeof value == 'number' && nativeIsFinite(value);
+	      }
+	      /**
+	       * Checks if `value` is classified as a `Function` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+	       * @example
+	       *
+	       * _.isFunction(_);
+	       * // => true
+	       *
+	       * _.isFunction(/abc/);
+	       * // => false
+	       */
+
+
+	      function isFunction(value) {
+	        if (!isObject(value)) {
+	          return false;
+	        } // The use of `Object#toString` avoids issues with the `typeof` operator
+	        // in Safari 9 which returns 'object' for typed arrays and other constructors.
+
+
+	        var tag = baseGetTag(value);
+	        return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
+	      }
+	      /**
+	       * Checks if `value` is an integer.
+	       *
+	       * **Note:** This method is based on
+	       * [`Number.isInteger`](https://mdn.io/Number/isInteger).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an integer, else `false`.
+	       * @example
+	       *
+	       * _.isInteger(3);
+	       * // => true
+	       *
+	       * _.isInteger(Number.MIN_VALUE);
+	       * // => false
+	       *
+	       * _.isInteger(Infinity);
+	       * // => false
+	       *
+	       * _.isInteger('3');
+	       * // => false
+	       */
+
+
+	      function isInteger(value) {
+	        return typeof value == 'number' && value == toInteger(value);
+	      }
+	      /**
+	       * Checks if `value` is a valid array-like length.
+	       *
+	       * **Note:** This method is loosely based on
+	       * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
+	       * @example
+	       *
+	       * _.isLength(3);
+	       * // => true
+	       *
+	       * _.isLength(Number.MIN_VALUE);
+	       * // => false
+	       *
+	       * _.isLength(Infinity);
+	       * // => false
+	       *
+	       * _.isLength('3');
+	       * // => false
+	       */
+
+
+	      function isLength(value) {
+	        return typeof value == 'number' && value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+	      }
+	      /**
+	       * Checks if `value` is the
+	       * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
+	       * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+	       * @example
+	       *
+	       * _.isObject({});
+	       * // => true
+	       *
+	       * _.isObject([1, 2, 3]);
+	       * // => true
+	       *
+	       * _.isObject(_.noop);
+	       * // => true
+	       *
+	       * _.isObject(null);
+	       * // => false
+	       */
+
+
+	      function isObject(value) {
+	        var type = _typeof(value);
+
+	        return value != null && (type == 'object' || type == 'function');
+	      }
+	      /**
+	       * Checks if `value` is object-like. A value is object-like if it's not `null`
+	       * and has a `typeof` result of "object".
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+	       * @example
+	       *
+	       * _.isObjectLike({});
+	       * // => true
+	       *
+	       * _.isObjectLike([1, 2, 3]);
+	       * // => true
+	       *
+	       * _.isObjectLike(_.noop);
+	       * // => false
+	       *
+	       * _.isObjectLike(null);
+	       * // => false
+	       */
+
+
+	      function isObjectLike(value) {
+	        return value != null && _typeof(value) == 'object';
+	      }
+	      /**
+	       * Checks if `value` is classified as a `Map` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.3.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a map, else `false`.
+	       * @example
+	       *
+	       * _.isMap(new Map);
+	       * // => true
+	       *
+	       * _.isMap(new WeakMap);
+	       * // => false
+	       */
+
+
+	      var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;
+	      /**
+	       * Performs a partial deep comparison between `object` and `source` to
+	       * determine if `object` contains equivalent property values.
+	       *
+	       * **Note:** This method is equivalent to `_.matches` when `source` is
+	       * partially applied.
+	       *
+	       * Partial comparisons will match empty array and empty object `source`
+	       * values against any array or object value, respectively. See `_.isEqual`
+	       * for a list of supported value comparisons.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Lang
+	       * @param {Object} object The object to inspect.
+	       * @param {Object} source The object of property values to match.
+	       * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': 2 };
+	       *
+	       * _.isMatch(object, { 'b': 2 });
+	       * // => true
+	       *
+	       * _.isMatch(object, { 'b': 1 });
+	       * // => false
+	       */
+
+	      function isMatch(object, source) {
+	        return object === source || baseIsMatch(object, source, getMatchData(source));
+	      }
+	      /**
+	       * This method is like `_.isMatch` except that it accepts `customizer` which
+	       * is invoked to compare values. If `customizer` returns `undefined`, comparisons
+	       * are handled by the method instead. The `customizer` is invoked with five
+	       * arguments: (objValue, srcValue, index|key, object, source).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {Object} object The object to inspect.
+	       * @param {Object} source The object of property values to match.
+	       * @param {Function} [customizer] The function to customize comparisons.
+	       * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+	       * @example
+	       *
+	       * function isGreeting(value) {
+	       *   return /^h(?:i|ello)$/.test(value);
+	       * }
+	       *
+	       * function customizer(objValue, srcValue) {
+	       *   if (isGreeting(objValue) && isGreeting(srcValue)) {
+	       *     return true;
+	       *   }
+	       * }
+	       *
+	       * var object = { 'greeting': 'hello' };
+	       * var source = { 'greeting': 'hi' };
+	       *
+	       * _.isMatchWith(object, source, customizer);
+	       * // => true
+	       */
+
+
+	      function isMatchWith(object, source, customizer) {
+	        customizer = typeof customizer == 'function' ? customizer : undefined$1;
+	        return baseIsMatch(object, source, getMatchData(source), customizer);
+	      }
+	      /**
+	       * Checks if `value` is `NaN`.
+	       *
+	       * **Note:** This method is based on
+	       * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
+	       * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
+	       * `undefined` and other non-number values.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+	       * @example
+	       *
+	       * _.isNaN(NaN);
+	       * // => true
+	       *
+	       * _.isNaN(new Number(NaN));
+	       * // => true
+	       *
+	       * isNaN(undefined);
+	       * // => true
+	       *
+	       * _.isNaN(undefined);
+	       * // => false
+	       */
+
+
+	      function isNaN(value) {
+	        // An `NaN` primitive is the only value that is not equal to itself.
+	        // Perform the `toStringTag` check first to avoid errors with some
+	        // ActiveX objects in IE.
+	        return isNumber(value) && value != +value;
+	      }
+	      /**
+	       * Checks if `value` is a pristine native function.
+	       *
+	       * **Note:** This method can't reliably detect native functions in the presence
+	       * of the core-js package because core-js circumvents this kind of detection.
+	       * Despite multiple requests, the core-js maintainer has made it clear: any
+	       * attempt to fix the detection will be obstructed. As a result, we're left
+	       * with little choice but to throw an error. Unfortunately, this also affects
+	       * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
+	       * which rely on core-js.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a native function,
+	       *  else `false`.
+	       * @example
+	       *
+	       * _.isNative(Array.prototype.push);
+	       * // => true
+	       *
+	       * _.isNative(_);
+	       * // => false
+	       */
+
+
+	      function isNative(value) {
+	        if (isMaskable(value)) {
+	          throw new Error(CORE_ERROR_TEXT);
 	        }
-	        if (!feature.geometry || feature.geometry.type !== type) {
-	            throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
+
+	        return baseIsNative(value);
+	      }
+	      /**
+	       * Checks if `value` is `null`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
+	       * @example
+	       *
+	       * _.isNull(null);
+	       * // => true
+	       *
+	       * _.isNull(void 0);
+	       * // => false
+	       */
+
+
+	      function isNull(value) {
+	        return value === null;
+	      }
+	      /**
+	       * Checks if `value` is `null` or `undefined`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
+	       * @example
+	       *
+	       * _.isNil(null);
+	       * // => true
+	       *
+	       * _.isNil(void 0);
+	       * // => true
+	       *
+	       * _.isNil(NaN);
+	       * // => false
+	       */
+
+
+	      function isNil(value) {
+	        return value == null;
+	      }
+	      /**
+	       * Checks if `value` is classified as a `Number` primitive or object.
+	       *
+	       * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
+	       * classified as numbers, use the `_.isFinite` method.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a number, else `false`.
+	       * @example
+	       *
+	       * _.isNumber(3);
+	       * // => true
+	       *
+	       * _.isNumber(Number.MIN_VALUE);
+	       * // => true
+	       *
+	       * _.isNumber(Infinity);
+	       * // => true
+	       *
+	       * _.isNumber('3');
+	       * // => false
+	       */
+
+
+	      function isNumber(value) {
+	        return typeof value == 'number' || isObjectLike(value) && baseGetTag(value) == numberTag;
+	      }
+	      /**
+	       * Checks if `value` is a plain object, that is, an object created by the
+	       * `Object` constructor or one with a `[[Prototype]]` of `null`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.8.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       * }
+	       *
+	       * _.isPlainObject(new Foo);
+	       * // => false
+	       *
+	       * _.isPlainObject([1, 2, 3]);
+	       * // => false
+	       *
+	       * _.isPlainObject({ 'x': 0, 'y': 0 });
+	       * // => true
+	       *
+	       * _.isPlainObject(Object.create(null));
+	       * // => true
+	       */
+
+
+	      function isPlainObject(value) {
+	        if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
+	          return false;
 	        }
-	    }
-	}
-	exports.collectionOf = collectionOf;
-	/**
-	 * Get Geometry from Feature or Geometry Object
-	 *
-	 * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
-	 * @returns {Geometry|null} GeoJSON Geometry Object
-	 * @throws {Error} if geojson is not a Feature or Geometry Object
-	 * @example
-	 * var point = {
-	 *   "type": "Feature",
-	 *   "properties": {},
-	 *   "geometry": {
-	 *     "type": "Point",
-	 *     "coordinates": [110, 40]
-	 *   }
-	 * }
-	 * var geom = turf.getGeom(point)
-	 * //={"type": "Point", "coordinates": [110, 40]}
-	 */
-	function getGeom(geojson) {
-	    if (geojson.type === "Feature") {
-	        return geojson.geometry;
-	    }
-	    return geojson;
-	}
-	exports.getGeom = getGeom;
-	/**
-	 * Get GeoJSON object's type, Geometry type is prioritize.
-	 *
-	 * @param {GeoJSON} geojson GeoJSON object
-	 * @param {string} [name="geojson"] name of the variable to display in error message
-	 * @returns {string} GeoJSON type
-	 * @example
-	 * var point = {
-	 *   "type": "Feature",
-	 *   "properties": {},
-	 *   "geometry": {
-	 *     "type": "Point",
-	 *     "coordinates": [110, 40]
-	 *   }
-	 * }
-	 * var geom = turf.getType(point)
-	 * //="Point"
-	 */
-	function getType(geojson, name) {
-	    if (geojson.type === "FeatureCollection") {
-	        return "FeatureCollection";
-	    }
-	    if (geojson.type === "GeometryCollection") {
-	        return "GeometryCollection";
-	    }
-	    if (geojson.type === "Feature" && geojson.geometry !== null) {
-	        return geojson.geometry.type;
-	    }
-	    return geojson.type;
-	}
-	exports.getType = getType;
-	});
 
-	var lineclip_1 = lineclip;
-	var _default = lineclip;
+	        var proto = getPrototype(value);
+
+	        if (proto === null) {
+	          return true;
+	        }
+
+	        var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
+	        return typeof Ctor == 'function' && Ctor instanceof Ctor && funcToString.call(Ctor) == objectCtorString;
+	      }
+	      /**
+	       * Checks if `value` is classified as a `RegExp` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.1.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
+	       * @example
+	       *
+	       * _.isRegExp(/abc/);
+	       * // => true
+	       *
+	       * _.isRegExp('/abc/');
+	       * // => false
+	       */
+
 
-	lineclip.polyline = lineclip;
-	lineclip.polygon = polygonclip;
+	      var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;
+	      /**
+	       * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
+	       * double precision number which isn't the result of a rounded unsafe integer.
+	       *
+	       * **Note:** This method is based on
+	       * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
+	       * @example
+	       *
+	       * _.isSafeInteger(3);
+	       * // => true
+	       *
+	       * _.isSafeInteger(Number.MIN_VALUE);
+	       * // => false
+	       *
+	       * _.isSafeInteger(Infinity);
+	       * // => false
+	       *
+	       * _.isSafeInteger('3');
+	       * // => false
+	       */
 
+	      function isSafeInteger(value) {
+	        return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
+	      }
+	      /**
+	       * Checks if `value` is classified as a `Set` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.3.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a set, else `false`.
+	       * @example
+	       *
+	       * _.isSet(new Set);
+	       * // => true
+	       *
+	       * _.isSet(new WeakSet);
+	       * // => false
+	       */
 
-	// Cohen-Sutherland line clippign algorithm, adapted to efficiently
-	// handle polylines rather than just segments
 
-	function lineclip(points, bbox, result) {
+	      var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;
+	      /**
+	       * Checks if `value` is classified as a `String` primitive or object.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+	       * @example
+	       *
+	       * _.isString('abc');
+	       * // => true
+	       *
+	       * _.isString(1);
+	       * // => false
+	       */
 
-	    var len = points.length,
-	        codeA = bitCode(points[0], bbox),
-	        part = [],
-	        i, a, b, codeB, lastCode;
+	      function isString(value) {
+	        return typeof value == 'string' || !isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag;
+	      }
+	      /**
+	       * Checks if `value` is classified as a `Symbol` primitive or object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+	       * @example
+	       *
+	       * _.isSymbol(Symbol.iterator);
+	       * // => true
+	       *
+	       * _.isSymbol('abc');
+	       * // => false
+	       */
 
-	    if (!result) { result = []; }
 
-	    for (i = 1; i < len; i++) {
-	        a = points[i - 1];
-	        b = points[i];
-	        codeB = lastCode = bitCode(b, bbox);
+	      function isSymbol(value) {
+	        return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
+	      }
+	      /**
+	       * Checks if `value` is classified as a typed array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+	       * @example
+	       *
+	       * _.isTypedArray(new Uint8Array);
+	       * // => true
+	       *
+	       * _.isTypedArray([]);
+	       * // => false
+	       */
 
-	        while (true) {
 
-	            if (!(codeA | codeB)) { // accept
-	                part.push(a);
+	      var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+	      /**
+	       * Checks if `value` is `undefined`.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
+	       * @example
+	       *
+	       * _.isUndefined(void 0);
+	       * // => true
+	       *
+	       * _.isUndefined(null);
+	       * // => false
+	       */
 
-	                if (codeB !== lastCode) { // segment went outside
-	                    part.push(b);
+	      function isUndefined(value) {
+	        return value === undefined$1;
+	      }
+	      /**
+	       * Checks if `value` is classified as a `WeakMap` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.3.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
+	       * @example
+	       *
+	       * _.isWeakMap(new WeakMap);
+	       * // => true
+	       *
+	       * _.isWeakMap(new Map);
+	       * // => false
+	       */
 
-	                    if (i < len - 1) { // start a new line
-	                        result.push(part);
-	                        part = [];
-	                    }
-	                } else if (i === len - 1) {
-	                    part.push(b);
-	                }
-	                break;
 
-	            } else if (codeA & codeB) { // trivial reject
-	                break;
+	      function isWeakMap(value) {
+	        return isObjectLike(value) && getTag(value) == weakMapTag;
+	      }
+	      /**
+	       * Checks if `value` is classified as a `WeakSet` object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.3.0
+	       * @category Lang
+	       * @param {*} value The value to check.
+	       * @returns {boolean} Returns `true` if `value` is a weak set, else `false`.
+	       * @example
+	       *
+	       * _.isWeakSet(new WeakSet);
+	       * // => true
+	       *
+	       * _.isWeakSet(new Set);
+	       * // => false
+	       */
 
-	            } else if (codeA) { // a outside, intersect with clip edge
-	                a = intersect(a, b, codeA, bbox);
-	                codeA = bitCode(a, bbox);
 
-	            } else { // b outside
-	                b = intersect(a, b, codeB, bbox);
-	                codeB = bitCode(b, bbox);
-	            }
+	      function isWeakSet(value) {
+	        return isObjectLike(value) && baseGetTag(value) == weakSetTag;
+	      }
+	      /**
+	       * Checks if `value` is less than `other`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.9.0
+	       * @category Lang
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if `value` is less than `other`,
+	       *  else `false`.
+	       * @see _.gt
+	       * @example
+	       *
+	       * _.lt(1, 3);
+	       * // => true
+	       *
+	       * _.lt(3, 3);
+	       * // => false
+	       *
+	       * _.lt(3, 1);
+	       * // => false
+	       */
+
+
+	      var lt = createRelationalOperation(baseLt);
+	      /**
+	       * Checks if `value` is less than or equal to `other`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.9.0
+	       * @category Lang
+	       * @param {*} value The value to compare.
+	       * @param {*} other The other value to compare.
+	       * @returns {boolean} Returns `true` if `value` is less than or equal to
+	       *  `other`, else `false`.
+	       * @see _.gte
+	       * @example
+	       *
+	       * _.lte(1, 3);
+	       * // => true
+	       *
+	       * _.lte(3, 3);
+	       * // => true
+	       *
+	       * _.lte(3, 1);
+	       * // => false
+	       */
+
+	      var lte = createRelationalOperation(function (value, other) {
+	        return value <= other;
+	      });
+	      /**
+	       * Converts `value` to an array.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Lang
+	       * @param {*} value The value to convert.
+	       * @returns {Array} Returns the converted array.
+	       * @example
+	       *
+	       * _.toArray({ 'a': 1, 'b': 2 });
+	       * // => [1, 2]
+	       *
+	       * _.toArray('abc');
+	       * // => ['a', 'b', 'c']
+	       *
+	       * _.toArray(1);
+	       * // => []
+	       *
+	       * _.toArray(null);
+	       * // => []
+	       */
+
+	      function toArray(value) {
+	        if (!value) {
+	          return [];
 	        }
 
-	        codeA = lastCode;
-	    }
+	        if (isArrayLike(value)) {
+	          return isString(value) ? stringToArray(value) : copyArray(value);
+	        }
+
+	        if (symIterator && value[symIterator]) {
+	          return iteratorToArray(value[symIterator]());
+	        }
+
+	        var tag = getTag(value),
+	            func = tag == mapTag ? mapToArray : tag == setTag ? setToArray : values;
+	        return func(value);
+	      }
+	      /**
+	       * Converts `value` to a finite number.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.12.0
+	       * @category Lang
+	       * @param {*} value The value to convert.
+	       * @returns {number} Returns the converted number.
+	       * @example
+	       *
+	       * _.toFinite(3.2);
+	       * // => 3.2
+	       *
+	       * _.toFinite(Number.MIN_VALUE);
+	       * // => 5e-324
+	       *
+	       * _.toFinite(Infinity);
+	       * // => 1.7976931348623157e+308
+	       *
+	       * _.toFinite('3.2');
+	       * // => 3.2
+	       */
 
-	    if (part.length) { result.push(part); }
 
-	    return result;
-	}
+	      function toFinite(value) {
+	        if (!value) {
+	          return value === 0 ? value : 0;
+	        }
 
-	// Sutherland-Hodgeman polygon clipping algorithm
+	        value = toNumber(value);
 
-	function polygonclip(points, bbox) {
+	        if (value === INFINITY || value === -INFINITY) {
+	          var sign = value < 0 ? -1 : 1;
+	          return sign * MAX_INTEGER;
+	        }
+
+	        return value === value ? value : 0;
+	      }
+	      /**
+	       * Converts `value` to an integer.
+	       *
+	       * **Note:** This method is loosely based on
+	       * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to convert.
+	       * @returns {number} Returns the converted integer.
+	       * @example
+	       *
+	       * _.toInteger(3.2);
+	       * // => 3
+	       *
+	       * _.toInteger(Number.MIN_VALUE);
+	       * // => 0
+	       *
+	       * _.toInteger(Infinity);
+	       * // => 1.7976931348623157e+308
+	       *
+	       * _.toInteger('3.2');
+	       * // => 3
+	       */
 
-	    var result, edge, prev, prevInside, i, p, inside;
 
-	    // clip against each side of the clip rectangle
-	    for (edge = 1; edge <= 8; edge *= 2) {
-	        result = [];
-	        prev = points[points.length - 1];
-	        prevInside = !(bitCode(prev, bbox) & edge);
+	      function toInteger(value) {
+	        var result = toFinite(value),
+	            remainder = result % 1;
+	        return result === result ? remainder ? result - remainder : result : 0;
+	      }
+	      /**
+	       * Converts `value` to an integer suitable for use as the length of an
+	       * array-like object.
+	       *
+	       * **Note:** This method is based on
+	       * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to convert.
+	       * @returns {number} Returns the converted integer.
+	       * @example
+	       *
+	       * _.toLength(3.2);
+	       * // => 3
+	       *
+	       * _.toLength(Number.MIN_VALUE);
+	       * // => 0
+	       *
+	       * _.toLength(Infinity);
+	       * // => 4294967295
+	       *
+	       * _.toLength('3.2');
+	       * // => 3
+	       */
 
-	        for (i = 0; i < points.length; i++) {
-	            p = points[i];
-	            inside = !(bitCode(p, bbox) & edge);
 
-	            // if segment goes through the clip window, add an intersection
-	            if (inside !== prevInside) { result.push(intersect(prev, p, edge, bbox)); }
+	      function toLength(value) {
+	        return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
+	      }
+	      /**
+	       * Converts `value` to a number.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to process.
+	       * @returns {number} Returns the number.
+	       * @example
+	       *
+	       * _.toNumber(3.2);
+	       * // => 3.2
+	       *
+	       * _.toNumber(Number.MIN_VALUE);
+	       * // => 5e-324
+	       *
+	       * _.toNumber(Infinity);
+	       * // => Infinity
+	       *
+	       * _.toNumber('3.2');
+	       * // => 3.2
+	       */
 
-	            if (inside) { result.push(p); } // add a point if it's inside
 
-	            prev = p;
-	            prevInside = inside;
+	      function toNumber(value) {
+	        if (typeof value == 'number') {
+	          return value;
 	        }
 
-	        points = result;
+	        if (isSymbol(value)) {
+	          return NAN;
+	        }
 
-	        if (!points.length) { break; }
-	    }
+	        if (isObject(value)) {
+	          var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
+	          value = isObject(other) ? other + '' : other;
+	        }
 
-	    return result;
-	}
+	        if (typeof value != 'string') {
+	          return value === 0 ? value : +value;
+	        }
 
-	// intersect a segment against one of the 4 lines that make up the bbox
+	        value = baseTrim(value);
+	        var isBinary = reIsBinary.test(value);
+	        return isBinary || reIsOctal.test(value) ? freeParseInt(value.slice(2), isBinary ? 2 : 8) : reIsBadHex.test(value) ? NAN : +value;
+	      }
+	      /**
+	       * Converts `value` to a plain object flattening inherited enumerable string
+	       * keyed properties of `value` to own properties of the plain object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Lang
+	       * @param {*} value The value to convert.
+	       * @returns {Object} Returns the converted plain object.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.assign({ 'a': 1 }, new Foo);
+	       * // => { 'a': 1, 'b': 2 }
+	       *
+	       * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
+	       * // => { 'a': 1, 'b': 2, 'c': 3 }
+	       */
 
-	function intersect(a, b, edge, bbox) {
-	    return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
-	           edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
-	           edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
-	           edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
-	           null;
-	}
 
-	// bit code reflects the point position relative to the bbox:
+	      function toPlainObject(value) {
+	        return copyObject(value, keysIn(value));
+	      }
+	      /**
+	       * Converts `value` to a safe integer. A safe integer can be compared and
+	       * represented correctly.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to convert.
+	       * @returns {number} Returns the converted integer.
+	       * @example
+	       *
+	       * _.toSafeInteger(3.2);
+	       * // => 3
+	       *
+	       * _.toSafeInteger(Number.MIN_VALUE);
+	       * // => 0
+	       *
+	       * _.toSafeInteger(Infinity);
+	       * // => 9007199254740991
+	       *
+	       * _.toSafeInteger('3.2');
+	       * // => 3
+	       */
 
-	//         left  mid  right
-	//    top  1001  1000  1010
-	//    mid  0001  0000  0010
-	// bottom  0101  0100  0110
 
-	function bitCode(p, bbox) {
-	    var code = 0;
+	      function toSafeInteger(value) {
+	        return value ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER) : value === 0 ? value : 0;
+	      }
+	      /**
+	       * Converts `value` to a string. An empty string is returned for `null`
+	       * and `undefined` values. The sign of `-0` is preserved.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Lang
+	       * @param {*} value The value to convert.
+	       * @returns {string} Returns the converted string.
+	       * @example
+	       *
+	       * _.toString(null);
+	       * // => ''
+	       *
+	       * _.toString(-0);
+	       * // => '-0'
+	       *
+	       * _.toString([1, 2, 3]);
+	       * // => '1,2,3'
+	       */
 
-	    if (p[0] < bbox[0]) { code |= 1; } // left
-	    else if (p[0] > bbox[2]) { code |= 2; } // right
 
-	    if (p[1] < bbox[1]) { code |= 4; } // bottom
-	    else if (p[1] > bbox[3]) { code |= 8; } // top
+	      function toString(value) {
+	        return value == null ? '' : baseToString(value);
+	      }
+	      /*------------------------------------------------------------------------*/
 
-	    return code;
-	}
-	lineclip_1.default = _default;
+	      /**
+	       * Assigns own enumerable string keyed properties of source objects to the
+	       * destination object. Source objects are applied from left to right.
+	       * Subsequent sources overwrite property assignments of previous sources.
+	       *
+	       * **Note:** This method mutates `object` and is loosely based on
+	       * [`Object.assign`](https://mdn.io/Object/assign).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.10.0
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} [sources] The source objects.
+	       * @returns {Object} Returns `object`.
+	       * @see _.assignIn
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       * }
+	       *
+	       * function Bar() {
+	       *   this.c = 3;
+	       * }
+	       *
+	       * Foo.prototype.b = 2;
+	       * Bar.prototype.d = 4;
+	       *
+	       * _.assign({ 'a': 0 }, new Foo, new Bar);
+	       * // => { 'a': 1, 'c': 3 }
+	       */
 
-	var bboxClip_1 = createCommonjsModule(function (module, exports) {
-	var __importStar = (commonjsGlobal && commonjsGlobal.__importStar) || function (mod) {
-	    if (mod && mod.__esModule) { return mod; }
-	    var result = {};
-	    if (mod != null) { for (var k in mod) { if (Object.hasOwnProperty.call(mod, k)) { result[k] = mod[k]; } } }
-	    result["default"] = mod;
-	    return result;
-	};
-	Object.defineProperty(exports, "__esModule", { value: true });
 
+	      var assign = createAssigner(function (object, source) {
+	        if (isPrototype(source) || isArrayLike(source)) {
+	          copyObject(source, keys(source), object);
+	          return;
+	        }
 
-	var lineclip = __importStar(lineclip_1);
-	/**
-	 * Takes a {@link Feature} and a bbox and clips the feature to the bbox using
-	 * [lineclip](https://github.com/mapbox/lineclip).
-	 * May result in degenerate edges when clipping Polygons.
-	 *
-	 * @name bboxClip
-	 * @param {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature feature to clip to the bbox
-	 * @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
-	 * @returns {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} clipped Feature
-	 * @example
-	 * var bbox = [0, 0, 10, 10];
-	 * var poly = turf.polygon([[[2, 2], [8, 4], [12, 8], [3, 7], [2, 2]]]);
-	 *
-	 * var clipped = turf.bboxClip(poly, bbox);
-	 *
-	 * //addToMap
-	 * var addToMap = [bbox, poly, clipped]
-	 */
-	function bboxClip(feature, bbox) {
-	    var geom = invariant.getGeom(feature);
-	    var type = geom.type;
-	    var properties = feature.type === "Feature" ? feature.properties : {};
-	    var coords = geom.coordinates;
-	    switch (type) {
-	        case "LineString":
-	        case "MultiLineString":
-	            var lines_1 = [];
-	            if (type === "LineString") {
-	                coords = [coords];
-	            }
-	            coords.forEach(function (line) {
-	                lineclip.polyline(line, bbox, lines_1);
-	            });
-	            if (lines_1.length === 1) {
-	                return helpers$1.lineString(lines_1[0], properties);
-	            }
-	            return helpers$1.multiLineString(lines_1, properties);
-	        case "Polygon":
-	            return helpers$1.polygon(clipPolygon(coords, bbox), properties);
-	        case "MultiPolygon":
-	            return helpers$1.multiPolygon(coords.map(function (poly) {
-	                return clipPolygon(poly, bbox);
-	            }), properties);
-	        default:
-	            throw new Error("geometry " + type + " not supported");
-	    }
-	}
-	exports.default = bboxClip;
-	function clipPolygon(rings, bbox) {
-	    var outRings = [];
-	    for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
-	        var ring = rings_1[_i];
-	        var clipped = lineclip.polygon(ring, bbox);
-	        if (clipped.length > 0) {
-	            if (clipped[0][0] !== clipped[clipped.length - 1][0] || clipped[0][1] !== clipped[clipped.length - 1][1]) {
-	                clipped.push(clipped[0]);
-	            }
-	            if (clipped.length >= 4) {
-	                outRings.push(clipped);
-	            }
+	        for (var key in source) {
+	          if (hasOwnProperty.call(source, key)) {
+	            assignValue(object, key, source[key]);
+	          }
 	        }
-	    }
-	    return outRings;
-	}
-	});
+	      });
+	      /**
+	       * This method is like `_.assign` except that it iterates over own and
+	       * inherited source properties.
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @alias extend
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} [sources] The source objects.
+	       * @returns {Object} Returns `object`.
+	       * @see _.assign
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       * }
+	       *
+	       * function Bar() {
+	       *   this.c = 3;
+	       * }
+	       *
+	       * Foo.prototype.b = 2;
+	       * Bar.prototype.d = 4;
+	       *
+	       * _.assignIn({ 'a': 0 }, new Foo, new Bar);
+	       * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
+	       */
+
+	      var assignIn = createAssigner(function (object, source) {
+	        copyObject(source, keysIn(source), object);
+	      });
+	      /**
+	       * This method is like `_.assignIn` except that it accepts `customizer`
+	       * which is invoked to produce the assigned values. If `customizer` returns
+	       * `undefined`, assignment is handled by the method instead. The `customizer`
+	       * is invoked with five arguments: (objValue, srcValue, key, object, source).
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @alias extendWith
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} sources The source objects.
+	       * @param {Function} [customizer] The function to customize assigned values.
+	       * @returns {Object} Returns `object`.
+	       * @see _.assignWith
+	       * @example
+	       *
+	       * function customizer(objValue, srcValue) {
+	       *   return _.isUndefined(objValue) ? srcValue : objValue;
+	       * }
+	       *
+	       * var defaults = _.partialRight(_.assignInWith, customizer);
+	       *
+	       * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+	       * // => { 'a': 1, 'b': 2 }
+	       */
+
+	      var assignInWith = createAssigner(function (object, source, srcIndex, customizer) {
+	        copyObject(source, keysIn(source), object, customizer);
+	      });
+	      /**
+	       * This method is like `_.assign` except that it accepts `customizer`
+	       * which is invoked to produce the assigned values. If `customizer` returns
+	       * `undefined`, assignment is handled by the method instead. The `customizer`
+	       * is invoked with five arguments: (objValue, srcValue, key, object, source).
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} sources The source objects.
+	       * @param {Function} [customizer] The function to customize assigned values.
+	       * @returns {Object} Returns `object`.
+	       * @see _.assignInWith
+	       * @example
+	       *
+	       * function customizer(objValue, srcValue) {
+	       *   return _.isUndefined(objValue) ? srcValue : objValue;
+	       * }
+	       *
+	       * var defaults = _.partialRight(_.assignWith, customizer);
+	       *
+	       * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+	       * // => { 'a': 1, 'b': 2 }
+	       */
+
+	      var assignWith = createAssigner(function (object, source, srcIndex, customizer) {
+	        copyObject(source, keys(source), object, customizer);
+	      });
+	      /**
+	       * Creates an array of values corresponding to `paths` of `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.0.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {...(string|string[])} [paths] The property paths to pick.
+	       * @returns {Array} Returns the picked values.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
+	       *
+	       * _.at(object, ['a[0].b.c', 'a[1]']);
+	       * // => [3, 4]
+	       */
+
+	      var at = flatRest(baseAt);
+	      /**
+	       * Creates an object that inherits from the `prototype` object. If a
+	       * `properties` object is given, its own enumerable string keyed properties
+	       * are assigned to the created object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.3.0
+	       * @category Object
+	       * @param {Object} prototype The object to inherit from.
+	       * @param {Object} [properties] The properties to assign to the object.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * function Shape() {
+	       *   this.x = 0;
+	       *   this.y = 0;
+	       * }
+	       *
+	       * function Circle() {
+	       *   Shape.call(this);
+	       * }
+	       *
+	       * Circle.prototype = _.create(Shape.prototype, {
+	       *   'constructor': Circle
+	       * });
+	       *
+	       * var circle = new Circle;
+	       * circle instanceof Circle;
+	       * // => true
+	       *
+	       * circle instanceof Shape;
+	       * // => true
+	       */
+
+	      function create(prototype, properties) {
+	        var result = baseCreate(prototype);
+	        return properties == null ? result : baseAssign(result, properties);
+	      }
+	      /**
+	       * Assigns own and inherited enumerable string keyed properties of source
+	       * objects to the destination object for all destination properties that
+	       * resolve to `undefined`. Source objects are applied from left to right.
+	       * Once a property is set, additional values of the same property are ignored.
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} [sources] The source objects.
+	       * @returns {Object} Returns `object`.
+	       * @see _.defaultsDeep
+	       * @example
+	       *
+	       * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+	       * // => { 'a': 1, 'b': 2 }
+	       */
 
-	var fastJsonStableStringify = function (data, opts) {
-	    if (!opts) { opts = {}; }
-	    if (typeof opts === 'function') { opts = { cmp: opts }; }
-	    var cycles = (typeof opts.cycles === 'boolean') ? opts.cycles : false;
-
-	    var cmp = opts.cmp && (function (f) {
-	        return function (node) {
-	            return function (a, b) {
-	                var aobj = { key: a, value: node[a] };
-	                var bobj = { key: b, value: node[b] };
-	                return f(aobj, bobj);
-	            };
-	        };
-	    })(opts.cmp);
 
-	    var seen = [];
-	    return (function stringify (node) {
-	        if (node && node.toJSON && typeof node.toJSON === 'function') {
-	            node = node.toJSON();
+	      var defaults = baseRest(function (object, sources) {
+	        object = Object(object);
+	        var index = -1;
+	        var length = sources.length;
+	        var guard = length > 2 ? sources[2] : undefined$1;
+
+	        if (guard && isIterateeCall(sources[0], sources[1], guard)) {
+	          length = 1;
 	        }
 
-	        if (node === undefined) { return; }
-	        if (typeof node == 'number') { return isFinite(node) ? '' + node : 'null'; }
-	        if (typeof node !== 'object') { return JSON.stringify(node); }
+	        while (++index < length) {
+	          var source = sources[index];
+	          var props = keysIn(source);
+	          var propsIndex = -1;
+	          var propsLength = props.length;
+
+	          while (++propsIndex < propsLength) {
+	            var key = props[propsIndex];
+	            var value = object[key];
 
-	        var i, out;
-	        if (Array.isArray(node)) {
-	            out = '[';
-	            for (i = 0; i < node.length; i++) {
-	                if (i) { out += ','; }
-	                out += stringify(node[i]) || 'null';
+	            if (value === undefined$1 || eq(value, objectProto[key]) && !hasOwnProperty.call(object, key)) {
+	              object[key] = source[key];
 	            }
-	            return out + ']';
+	          }
 	        }
 
-	        if (node === null) { return 'null'; }
+	        return object;
+	      });
+	      /**
+	       * This method is like `_.defaults` except that it recursively assigns
+	       * default properties.
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.10.0
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} [sources] The source objects.
+	       * @returns {Object} Returns `object`.
+	       * @see _.defaults
+	       * @example
+	       *
+	       * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });
+	       * // => { 'a': { 'b': 2, 'c': 3 } }
+	       */
 
-	        if (seen.indexOf(node) !== -1) {
-	            if (cycles) { return JSON.stringify('__cycle__'); }
-	            throw new TypeError('Converting circular structure to JSON');
-	        }
+	      var defaultsDeep = baseRest(function (args) {
+	        args.push(undefined$1, customDefaultsMerge);
+	        return apply(mergeWith, undefined$1, args);
+	      });
+	      /**
+	       * This method is like `_.find` except that it returns the key of the first
+	       * element `predicate` returns truthy for instead of the element itself.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.1.0
+	       * @category Object
+	       * @param {Object} object The object to inspect.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {string|undefined} Returns the key of the matched element,
+	       *  else `undefined`.
+	       * @example
+	       *
+	       * var users = {
+	       *   'barney':  { 'age': 36, 'active': true },
+	       *   'fred':    { 'age': 40, 'active': false },
+	       *   'pebbles': { 'age': 1,  'active': true }
+	       * };
+	       *
+	       * _.findKey(users, function(o) { return o.age < 40; });
+	       * // => 'barney' (iteration order is not guaranteed)
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.findKey(users, { 'age': 1, 'active': true });
+	       * // => 'pebbles'
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.findKey(users, ['active', false]);
+	       * // => 'fred'
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.findKey(users, 'active');
+	       * // => 'barney'
+	       */
 
-	        var seenIndex = seen.push(node) - 1;
-	        var keys = Object.keys(node).sort(cmp && cmp(node));
-	        out = '';
-	        for (i = 0; i < keys.length; i++) {
-	            var key = keys[i];
-	            var value = stringify(node[key]);
+	      function findKey(object, predicate) {
+	        return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);
+	      }
+	      /**
+	       * This method is like `_.findKey` except that it iterates over elements of
+	       * a collection in the opposite order.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Object
+	       * @param {Object} object The object to inspect.
+	       * @param {Function} [predicate=_.identity] The function invoked per iteration.
+	       * @returns {string|undefined} Returns the key of the matched element,
+	       *  else `undefined`.
+	       * @example
+	       *
+	       * var users = {
+	       *   'barney':  { 'age': 36, 'active': true },
+	       *   'fred':    { 'age': 40, 'active': false },
+	       *   'pebbles': { 'age': 1,  'active': true }
+	       * };
+	       *
+	       * _.findLastKey(users, function(o) { return o.age < 40; });
+	       * // => returns 'pebbles' assuming `_.findKey` returns 'barney'
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.findLastKey(users, { 'age': 36, 'active': true });
+	       * // => 'barney'
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.findLastKey(users, ['active', false]);
+	       * // => 'fred'
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.findLastKey(users, 'active');
+	       * // => 'pebbles'
+	       */
 
-	            if (!value) { continue; }
-	            if (out) { out += ','; }
-	            out += JSON.stringify(key) + ':' + value;
-	        }
-	        seen.splice(seenIndex, 1);
-	        return '{' + out + '}';
-	    })(data);
-	};
 
-	function DEFAULT_COMPARE (a, b) { return a > b ? 1 : a < b ? -1 : 0; }
+	      function findLastKey(object, predicate) {
+	        return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);
+	      }
+	      /**
+	       * Iterates over own and inherited enumerable string keyed properties of an
+	       * object and invokes `iteratee` for each property. The iteratee is invoked
+	       * with three arguments: (value, key, object). Iteratee functions may exit
+	       * iteration early by explicitly returning `false`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.3.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Object} Returns `object`.
+	       * @see _.forInRight
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.forIn(new Foo, function(value, key) {
+	       *   console.log(key);
+	       * });
+	       * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
+	       */
 
-	var SplayTree = function SplayTree(compare, noDuplicates) {
-	  if ( compare === void 0 ) compare = DEFAULT_COMPARE;
-	  if ( noDuplicates === void 0 ) noDuplicates = false;
 
-	  this._compare = compare;
-	  this._root = null;
-	  this._size = 0;
-	  this._noDuplicates = !!noDuplicates;
-	};
+	      function forIn(object, iteratee) {
+	        return object == null ? object : baseFor(object, getIteratee(iteratee, 3), keysIn);
+	      }
+	      /**
+	       * This method is like `_.forIn` except that it iterates over properties of
+	       * `object` in the opposite order.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Object} Returns `object`.
+	       * @see _.forIn
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.forInRight(new Foo, function(value, key) {
+	       *   console.log(key);
+	       * });
+	       * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.
+	       */
 
-	var prototypeAccessors = { size: { configurable: true } };
 
+	      function forInRight(object, iteratee) {
+	        return object == null ? object : baseForRight(object, getIteratee(iteratee, 3), keysIn);
+	      }
+	      /**
+	       * Iterates over own enumerable string keyed properties of an object and
+	       * invokes `iteratee` for each property. The iteratee is invoked with three
+	       * arguments: (value, key, object). Iteratee functions may exit iteration
+	       * early by explicitly returning `false`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.3.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Object} Returns `object`.
+	       * @see _.forOwnRight
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.forOwn(new Foo, function(value, key) {
+	       *   console.log(key);
+	       * });
+	       * // => Logs 'a' then 'b' (iteration order is not guaranteed).
+	       */
 
-	SplayTree.prototype.rotateLeft = function rotateLeft (x) {
-	  var y = x.right;
-	  if (y) {
-	    x.right = y.left;
-	    if (y.left) { y.left.parent = x; }
-	    y.parent = x.parent;
-	  }
 
-	  if (!x.parent)              { this._root = y; }
-	  else if (x === x.parent.left) { x.parent.left = y; }
-	  else                        { x.parent.right = y; }
-	  if (y) { y.left = x; }
-	  x.parent = y;
-	};
+	      function forOwn(object, iteratee) {
+	        return object && baseForOwn(object, getIteratee(iteratee, 3));
+	      }
+	      /**
+	       * This method is like `_.forOwn` except that it iterates over properties of
+	       * `object` in the opposite order.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.0.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Object} Returns `object`.
+	       * @see _.forOwn
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.forOwnRight(new Foo, function(value, key) {
+	       *   console.log(key);
+	       * });
+	       * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.
+	       */
 
 
-	SplayTree.prototype.rotateRight = function rotateRight (x) {
-	  var y = x.left;
-	  if (y) {
-	    x.left = y.right;
-	    if (y.right) { y.right.parent = x; }
-	    y.parent = x.parent;
-	  }
+	      function forOwnRight(object, iteratee) {
+	        return object && baseForOwnRight(object, getIteratee(iteratee, 3));
+	      }
+	      /**
+	       * Creates an array of function property names from own enumerable properties
+	       * of `object`.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The object to inspect.
+	       * @returns {Array} Returns the function names.
+	       * @see _.functionsIn
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = _.constant('a');
+	       *   this.b = _.constant('b');
+	       * }
+	       *
+	       * Foo.prototype.c = _.constant('c');
+	       *
+	       * _.functions(new Foo);
+	       * // => ['a', 'b']
+	       */
 
-	  if (!x.parent)             { this._root = y; }
-	  else if(x === x.parent.left) { x.parent.left = y; }
-	  else                       { x.parent.right = y; }
-	  if (y) { y.right = x; }
-	  x.parent = y;
-	};
+
+	      function functions(object) {
+	        return object == null ? [] : baseFunctions(object, keys(object));
+	      }
+	      /**
+	       * Creates an array of function property names from own and inherited
+	       * enumerable properties of `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The object to inspect.
+	       * @returns {Array} Returns the function names.
+	       * @see _.functions
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = _.constant('a');
+	       *   this.b = _.constant('b');
+	       * }
+	       *
+	       * Foo.prototype.c = _.constant('c');
+	       *
+	       * _.functionsIn(new Foo);
+	       * // => ['a', 'b', 'c']
+	       */
 
 
-	SplayTree.prototype._splay = function _splay (x) {
-	  while (x.parent) {
-	    var p = x.parent;
-	    if (!p.parent) {
-	      if (p.left === x) { this.rotateRight(p); }
-	      else            { this.rotateLeft(p); }
-	    } else if (p.left === x && p.parent.left === p) {
-	      this.rotateRight(p.parent);
-	      this.rotateRight(p);
-	    } else if (p.right === x && p.parent.right === p) {
-	      this.rotateLeft(p.parent);
-	      this.rotateLeft(p);
-	    } else if (p.left === x && p.parent.right === p) {
-	      this.rotateRight(p);
-	      this.rotateLeft(p);
-	    } else {
-	      this.rotateLeft(p);
-	      this.rotateRight(p);
-	    }
-	  }
-	};
+	      function functionsIn(object) {
+	        return object == null ? [] : baseFunctions(object, keysIn(object));
+	      }
+	      /**
+	       * Gets the value at `path` of `object`. If the resolved value is
+	       * `undefined`, the `defaultValue` is returned in its place.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.7.0
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path of the property to get.
+	       * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+	       * @returns {*} Returns the resolved value.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+	       *
+	       * _.get(object, 'a[0].b.c');
+	       * // => 3
+	       *
+	       * _.get(object, ['a', '0', 'b', 'c']);
+	       * // => 3
+	       *
+	       * _.get(object, 'a.b.c', 'default');
+	       * // => 'default'
+	       */
 
 
-	SplayTree.prototype.splay = function splay (x) {
-	  var p, gp, ggp, l, r;
+	      function get(object, path, defaultValue) {
+	        var result = object == null ? undefined$1 : baseGet(object, path);
+	        return result === undefined$1 ? defaultValue : result;
+	      }
+	      /**
+	       * Checks if `path` is a direct property of `object`.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path to check.
+	       * @returns {boolean} Returns `true` if `path` exists, else `false`.
+	       * @example
+	       *
+	       * var object = { 'a': { 'b': 2 } };
+	       * var other = _.create({ 'a': _.create({ 'b': 2 }) });
+	       *
+	       * _.has(object, 'a');
+	       * // => true
+	       *
+	       * _.has(object, 'a.b');
+	       * // => true
+	       *
+	       * _.has(object, ['a', 'b']);
+	       * // => true
+	       *
+	       * _.has(other, 'a');
+	       * // => false
+	       */
 
-	  while (x.parent) {
-	    p = x.parent;
-	    gp = p.parent;
 
-	    if (gp && gp.parent) {
-	      ggp = gp.parent;
-	      if (ggp.left === gp) { ggp.left= x; }
-	      else               { ggp.right = x; }
-	      x.parent = ggp;
-	    } else {
-	      x.parent = null;
-	      this._root = x;
-	    }
+	      function has(object, path) {
+	        return object != null && hasPath(object, path, baseHas);
+	      }
+	      /**
+	       * Checks if `path` is a direct or inherited property of `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path to check.
+	       * @returns {boolean} Returns `true` if `path` exists, else `false`.
+	       * @example
+	       *
+	       * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+	       *
+	       * _.hasIn(object, 'a');
+	       * // => true
+	       *
+	       * _.hasIn(object, 'a.b');
+	       * // => true
+	       *
+	       * _.hasIn(object, ['a', 'b']);
+	       * // => true
+	       *
+	       * _.hasIn(object, 'b');
+	       * // => false
+	       */
 
-	    l = x.left; r = x.right;
 
-	    if (x === p.left) { // left
-	      if (gp) {
-	        if (gp.left === p) {
-	          /* zig-zig */
-	          if (p.right) {
-	            gp.left = p.right;
-	            gp.left.parent = gp;
-	          } else { gp.left = null; }
+	      function hasIn(object, path) {
+	        return object != null && hasPath(object, path, baseHasIn);
+	      }
+	      /**
+	       * Creates an object composed of the inverted keys and values of `object`.
+	       * If `object` contains duplicate values, subsequent values overwrite
+	       * property assignments of previous values.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.7.0
+	       * @category Object
+	       * @param {Object} object The object to invert.
+	       * @returns {Object} Returns the new inverted object.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': 2, 'c': 1 };
+	       *
+	       * _.invert(object);
+	       * // => { '1': 'c', '2': 'b' }
+	       */
 
-	          p.right = gp;
-	          gp.parent = p;
-	        } else {
-	          /* zig-zag */
-	          if (l) {
-	            gp.right = l;
-	            l.parent = gp;
-	          } else { gp.right = null; }
-
-	          x.left  = gp;
-	          gp.parent = x;
-	        }
-	      }
-	      if (r) {
-	        p.left = r;
-	        r.parent = p;
-	      } else { p.left = null; }
-
-	      x.right= p;
-	      p.parent = x;
-	    } else { // right
-	      if (gp) {
-	        if (gp.right === p) {
-	          /* zig-zig */
-	          if (p.left) {
-	            gp.right = p.left;
-	            gp.right.parent = gp;
-	          } else { gp.right = null; }
-
-	          p.left = gp;
-	          gp.parent = p;
-	        } else {
-	          /* zig-zag */
-	          if (r) {
-	            gp.left = r;
-	            r.parent = gp;
-	          } else { gp.left = null; }
 
-	          x.right = gp;
-	          gp.parent = x;
+	      var invert = createInverter(function (result, value, key) {
+	        if (value != null && typeof value.toString != 'function') {
+	          value = nativeObjectToString.call(value);
+	        }
+
+	        result[value] = key;
+	      }, constant(identity));
+	      /**
+	       * This method is like `_.invert` except that the inverted object is generated
+	       * from the results of running each element of `object` thru `iteratee`. The
+	       * corresponding inverted value of each inverted key is an array of keys
+	       * responsible for generating the inverted value. The iteratee is invoked
+	       * with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.1.0
+	       * @category Object
+	       * @param {Object} object The object to invert.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {Object} Returns the new inverted object.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': 2, 'c': 1 };
+	       *
+	       * _.invertBy(object);
+	       * // => { '1': ['a', 'c'], '2': ['b'] }
+	       *
+	       * _.invertBy(object, function(value) {
+	       *   return 'group' + value;
+	       * });
+	       * // => { 'group1': ['a', 'c'], 'group2': ['b'] }
+	       */
+
+	      var invertBy = createInverter(function (result, value, key) {
+	        if (value != null && typeof value.toString != 'function') {
+	          value = nativeObjectToString.call(value);
+	        }
+
+	        if (hasOwnProperty.call(result, value)) {
+	          result[value].push(key);
+	        } else {
+	          result[value] = [key];
 	        }
+	      }, getIteratee);
+	      /**
+	       * Invokes the method at `path` of `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path of the method to invoke.
+	       * @param {...*} [args] The arguments to invoke the method with.
+	       * @returns {*} Returns the result of the invoked method.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
+	       *
+	       * _.invoke(object, 'a[0].b.c.slice', 1, 3);
+	       * // => [2, 3]
+	       */
+
+	      var invoke = baseRest(baseInvoke);
+	      /**
+	       * Creates an array of the own enumerable property names of `object`.
+	       *
+	       * **Note:** Non-object values are coerced to objects. See the
+	       * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+	       * for more details.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property names.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.keys(new Foo);
+	       * // => ['a', 'b'] (iteration order is not guaranteed)
+	       *
+	       * _.keys('hi');
+	       * // => ['0', '1']
+	       */
+
+	      function keys(object) {
+	        return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
 	      }
-	      if (l) {
-	        p.right = l;
-	        l.parent = p;
-	      } else { p.right = null; }
+	      /**
+	       * Creates an array of the own and inherited enumerable property names of `object`.
+	       *
+	       * **Note:** Non-object values are coerced to objects.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property names.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.keysIn(new Foo);
+	       * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
+	       */
 
-	      x.left = p;
-	      p.parent = x;
-	    }
-	  }
-	};
 
+	      function keysIn(object) {
+	        return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
+	      }
+	      /**
+	       * The opposite of `_.mapValues`; this method creates an object with the
+	       * same values as `object` and keys generated by running each own enumerable
+	       * string keyed property of `object` thru `iteratee`. The iteratee is invoked
+	       * with three arguments: (value, key, object).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.8.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Object} Returns the new mapped object.
+	       * @see _.mapValues
+	       * @example
+	       *
+	       * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
+	       *   return key + value;
+	       * });
+	       * // => { 'a1': 1, 'b2': 2 }
+	       */
 
-	SplayTree.prototype.replace = function replace (u, v) {
-	  if (!u.parent) { this._root = v; }
-	  else if (u === u.parent.left) { u.parent.left = v; }
-	  else { u.parent.right = v; }
-	  if (v) { v.parent = u.parent; }
-	};
 
+	      function mapKeys(object, iteratee) {
+	        var result = {};
+	        iteratee = getIteratee(iteratee, 3);
+	        baseForOwn(object, function (value, key, object) {
+	          baseAssignValue(result, iteratee(value, key, object), value);
+	        });
+	        return result;
+	      }
+	      /**
+	       * Creates an object with the same keys as `object` and values generated
+	       * by running each own enumerable string keyed property of `object` thru
+	       * `iteratee`. The iteratee is invoked with three arguments:
+	       * (value, key, object).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.4.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Object} Returns the new mapped object.
+	       * @see _.mapKeys
+	       * @example
+	       *
+	       * var users = {
+	       *   'fred':    { 'user': 'fred',    'age': 40 },
+	       *   'pebbles': { 'user': 'pebbles', 'age': 1 }
+	       * };
+	       *
+	       * _.mapValues(users, function(o) { return o.age; });
+	       * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.mapValues(users, 'age');
+	       * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
+	       */
 
-	SplayTree.prototype.minNode = function minNode (u) {
-	    if ( u === void 0 ) u = this._root;
 
-	  if (u) { while (u.left) { u = u.left; } }
-	  return u;
-	};
+	      function mapValues(object, iteratee) {
+	        var result = {};
+	        iteratee = getIteratee(iteratee, 3);
+	        baseForOwn(object, function (value, key, object) {
+	          baseAssignValue(result, key, iteratee(value, key, object));
+	        });
+	        return result;
+	      }
+	      /**
+	       * This method is like `_.assign` except that it recursively merges own and
+	       * inherited enumerable string keyed properties of source objects into the
+	       * destination object. Source properties that resolve to `undefined` are
+	       * skipped if a destination value exists. Array and plain object properties
+	       * are merged recursively. Other objects and value types are overridden by
+	       * assignment. Source objects are applied from left to right. Subsequent
+	       * sources overwrite property assignments of previous sources.
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.5.0
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} [sources] The source objects.
+	       * @returns {Object} Returns `object`.
+	       * @example
+	       *
+	       * var object = {
+	       *   'a': [{ 'b': 2 }, { 'd': 4 }]
+	       * };
+	       *
+	       * var other = {
+	       *   'a': [{ 'c': 3 }, { 'e': 5 }]
+	       * };
+	       *
+	       * _.merge(object, other);
+	       * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
+	       */
 
 
-	SplayTree.prototype.maxNode = function maxNode (u) {
-	    if ( u === void 0 ) u = this._root;
+	      var merge = createAssigner(function (object, source, srcIndex) {
+	        baseMerge(object, source, srcIndex);
+	      });
+	      /**
+	       * This method is like `_.merge` except that it accepts `customizer` which
+	       * is invoked to produce the merged values of the destination and source
+	       * properties. If `customizer` returns `undefined`, merging is handled by the
+	       * method instead. The `customizer` is invoked with six arguments:
+	       * (objValue, srcValue, key, object, source, stack).
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The destination object.
+	       * @param {...Object} sources The source objects.
+	       * @param {Function} customizer The function to customize assigned values.
+	       * @returns {Object} Returns `object`.
+	       * @example
+	       *
+	       * function customizer(objValue, srcValue) {
+	       *   if (_.isArray(objValue)) {
+	       *     return objValue.concat(srcValue);
+	       *   }
+	       * }
+	       *
+	       * var object = { 'a': [1], 'b': [2] };
+	       * var other = { 'a': [3], 'b': [4] };
+	       *
+	       * _.mergeWith(object, other, customizer);
+	       * // => { 'a': [1, 3], 'b': [2, 4] }
+	       */
 
-	  if (u) { while (u.right) { u = u.right; } }
-	  return u;
-	};
+	      var mergeWith = createAssigner(function (object, source, srcIndex, customizer) {
+	        baseMerge(object, source, srcIndex, customizer);
+	      });
+	      /**
+	       * The opposite of `_.pick`; this method creates an object composed of the
+	       * own and inherited enumerable property paths of `object` that are not omitted.
+	       *
+	       * **Note:** This method is considerably slower than `_.pick`.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The source object.
+	       * @param {...(string|string[])} [paths] The property paths to omit.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': '2', 'c': 3 };
+	       *
+	       * _.omit(object, ['a', 'c']);
+	       * // => { 'b': '2' }
+	       */
 
+	      var omit = flatRest(function (object, paths) {
+	        var result = {};
 
-	SplayTree.prototype.insert = function insert (key, data) {
-	  var z = this._root;
-	  var p = null;
-	  var comp = this._compare;
-	  var cmp;
+	        if (object == null) {
+	          return result;
+	        }
 
-	  if (this._noDuplicates) {
-	    while (z) {
-	      p = z;
-	      cmp = comp(z.key, key);
-	      if (cmp === 0) { return; }
-	      else if (comp(z.key, key) < 0) { z = z.right; }
-	      else { z = z.left; }
-	    }
-	  } else {
-	    while (z) {
-	      p = z;
-	      if (comp(z.key, key) < 0) { z = z.right; }
-	      else { z = z.left; }
-	    }
-	  }
+	        var isDeep = false;
+	        paths = arrayMap(paths, function (path) {
+	          path = castPath(path, object);
+	          isDeep || (isDeep = path.length > 1);
+	          return path;
+	        });
+	        copyObject(object, getAllKeysIn(object), result);
 
-	  z = { key: key, data: data, left: null, right: null, parent: p };
+	        if (isDeep) {
+	          result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);
+	        }
 
-	  if (!p)                        { this._root = z; }
-	  else if (comp(p.key, z.key) < 0) { p.right = z; }
-	  else                           { p.left= z; }
+	        var length = paths.length;
 
-	  this.splay(z);
-	  this._size++;
-	  return z;
-	};
+	        while (length--) {
+	          baseUnset(result, paths[length]);
+	        }
 
+	        return result;
+	      });
+	      /**
+	       * The opposite of `_.pickBy`; this method creates an object composed of
+	       * the own and inherited enumerable string keyed properties of `object` that
+	       * `predicate` doesn't return truthy for. The predicate is invoked with two
+	       * arguments: (value, key).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The source object.
+	       * @param {Function} [predicate=_.identity] The function invoked per property.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': '2', 'c': 3 };
+	       *
+	       * _.omitBy(object, _.isNumber);
+	       * // => { 'b': '2' }
+	       */
 
-	SplayTree.prototype.find = function find (key) {
-	  var z  = this._root;
-	  var comp = this._compare;
-	  while (z) {
-	    var cmp = comp(z.key, key);
-	    if    (cmp < 0) { z = z.right; }
-	    else if (cmp > 0) { z = z.left; }
-	    else            { return z; }
-	  }
-	  return null;
-	};
+	      function omitBy(object, predicate) {
+	        return pickBy(object, negate(getIteratee(predicate)));
+	      }
+	      /**
+	       * Creates an object composed of the picked `object` properties.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The source object.
+	       * @param {...(string|string[])} [paths] The property paths to pick.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': '2', 'c': 3 };
+	       *
+	       * _.pick(object, ['a', 'c']);
+	       * // => { 'a': 1, 'c': 3 }
+	       */
 
-	/**
-	 * Whether the tree contains a node with the given key
-	 * @param{Key} key
-	 * @return {boolean} true/false
-	 */
-	SplayTree.prototype.contains = function contains (key) {
-	  var node     = this._root;
-	  var comparator = this._compare;
-	  while (node){
-	    var cmp = comparator(key, node.key);
-	    if    (cmp === 0) { return true; }
-	    else if (cmp < 0) { node = node.left; }
-	    else              { node = node.right; }
-	  }
 
-	  return false;
-	};
+	      var pick = flatRest(function (object, paths) {
+	        return object == null ? {} : basePick(object, paths);
+	      });
+	      /**
+	       * Creates an object composed of the `object` properties `predicate` returns
+	       * truthy for. The predicate is invoked with two arguments: (value, key).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The source object.
+	       * @param {Function} [predicate=_.identity] The function invoked per property.
+	       * @returns {Object} Returns the new object.
+	       * @example
+	       *
+	       * var object = { 'a': 1, 'b': '2', 'c': 3 };
+	       *
+	       * _.pickBy(object, _.isNumber);
+	       * // => { 'a': 1, 'c': 3 }
+	       */
 
+	      function pickBy(object, predicate) {
+	        if (object == null) {
+	          return {};
+	        }
 
-	SplayTree.prototype.remove = function remove (key) {
-	  var z = this.find(key);
+	        var props = arrayMap(getAllKeysIn(object), function (prop) {
+	          return [prop];
+	        });
+	        predicate = getIteratee(predicate);
+	        return basePickBy(object, props, function (value, path) {
+	          return predicate(value, path[0]);
+	        });
+	      }
+	      /**
+	       * This method is like `_.get` except that if the resolved value is a
+	       * function it's invoked with the `this` binding of its parent object and
+	       * its result is returned.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @param {Array|string} path The path of the property to resolve.
+	       * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+	       * @returns {*} Returns the resolved value.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
+	       *
+	       * _.result(object, 'a[0].b.c1');
+	       * // => 3
+	       *
+	       * _.result(object, 'a[0].b.c2');
+	       * // => 4
+	       *
+	       * _.result(object, 'a[0].b.c3', 'default');
+	       * // => 'default'
+	       *
+	       * _.result(object, 'a[0].b.c3', _.constant('default'));
+	       * // => 'default'
+	       */
 
-	  if (!z) { return false; }
 
-	  this.splay(z);
+	      function result(object, path, defaultValue) {
+	        path = castPath(path, object);
+	        var index = -1,
+	            length = path.length; // Ensure the loop is entered when path is empty.
 
-	  if (!z.left) { this.replace(z, z.right); }
-	  else if (!z.right) { this.replace(z, z.left); }
-	  else {
-	    var y = this.minNode(z.right);
-	    if (y.parent !== z) {
-	      this.replace(y, y.right);
-	      y.right = z.right;
-	      y.right.parent = y;
-	    }
-	    this.replace(z, y);
-	    y.left = z.left;
-	    y.left.parent = y;
-	  }
+	        if (!length) {
+	          length = 1;
+	          object = undefined$1;
+	        }
 
-	  this._size--;
-	  return true;
-	};
+	        while (++index < length) {
+	          var value = object == null ? undefined$1 : object[toKey(path[index])];
 
+	          if (value === undefined$1) {
+	            index = length;
+	            value = defaultValue;
+	          }
 
-	SplayTree.prototype.removeNode = function removeNode (z) {
-	  if (!z) { return false; }
+	          object = isFunction(value) ? value.call(object) : value;
+	        }
 
-	  this.splay(z);
+	        return object;
+	      }
+	      /**
+	       * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,
+	       * it's created. Arrays are created for missing index properties while objects
+	       * are created for all other missing properties. Use `_.setWith` to customize
+	       * `path` creation.
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.7.0
+	       * @category Object
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The path of the property to set.
+	       * @param {*} value The value to set.
+	       * @returns {Object} Returns `object`.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+	       *
+	       * _.set(object, 'a[0].b.c', 4);
+	       * console.log(object.a[0].b.c);
+	       * // => 4
+	       *
+	       * _.set(object, ['x', '0', 'y', 'z'], 5);
+	       * console.log(object.x[0].y.z);
+	       * // => 5
+	       */
 
-	  if (!z.left) { this.replace(z, z.right); }
-	  else if (!z.right) { this.replace(z, z.left); }
-	  else {
-	    var y = this.minNode(z.right);
-	    if (y.parent !== z) {
-	      this.replace(y, y.right);
-	      y.right = z.right;
-	      y.right.parent = y;
-	    }
-	    this.replace(z, y);
-	    y.left = z.left;
-	    y.left.parent = y;
-	  }
 
-	  this._size--;
-	  return true;
-	};
+	      function set(object, path, value) {
+	        return object == null ? object : baseSet(object, path, value);
+	      }
+	      /**
+	       * This method is like `_.set` except that it accepts `customizer` which is
+	       * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
+	       * path creation is handled by the method instead. The `customizer` is invoked
+	       * with three arguments: (nsValue, key, nsObject).
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The path of the property to set.
+	       * @param {*} value The value to set.
+	       * @param {Function} [customizer] The function to customize assigned values.
+	       * @returns {Object} Returns `object`.
+	       * @example
+	       *
+	       * var object = {};
+	       *
+	       * _.setWith(object, '[0][1]', 'a', Object);
+	       * // => { '0': { '1': 'a' } }
+	       */
+
 
+	      function setWith(object, path, value, customizer) {
+	        customizer = typeof customizer == 'function' ? customizer : undefined$1;
+	        return object == null ? object : baseSet(object, path, value, customizer);
+	      }
+	      /**
+	       * Creates an array of own enumerable string keyed-value pairs for `object`
+	       * which can be consumed by `_.fromPairs`. If `object` is a map or set, its
+	       * entries are returned.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @alias entries
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the key-value pairs.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.toPairs(new Foo);
+	       * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
+	       */
 
-	SplayTree.prototype.erase = function erase (key) {
-	  var z = this.find(key);
-	  if (!z) { return; }
 
-	  this.splay(z);
+	      var toPairs = createToPairs(keys);
+	      /**
+	       * Creates an array of own and inherited enumerable string keyed-value pairs
+	       * for `object` which can be consumed by `_.fromPairs`. If `object` is a map
+	       * or set, its entries are returned.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @alias entriesIn
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the key-value pairs.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.toPairsIn(new Foo);
+	       * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)
+	       */
 
-	  var s = z.left;
-	  var t = z.right;
+	      var toPairsIn = createToPairs(keysIn);
+	      /**
+	       * An alternative to `_.reduce`; this method transforms `object` to a new
+	       * `accumulator` object which is the result of running each of its own
+	       * enumerable string keyed properties thru `iteratee`, with each invocation
+	       * potentially mutating the `accumulator` object. If `accumulator` is not
+	       * provided, a new object with the same `[[Prototype]]` will be used. The
+	       * iteratee is invoked with four arguments: (accumulator, value, key, object).
+	       * Iteratee functions may exit iteration early by explicitly returning `false`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.3.0
+	       * @category Object
+	       * @param {Object} object The object to iterate over.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @param {*} [accumulator] The custom accumulator value.
+	       * @returns {*} Returns the accumulated value.
+	       * @example
+	       *
+	       * _.transform([2, 3, 4], function(result, n) {
+	       *   result.push(n *= n);
+	       *   return n % 2 == 0;
+	       * }, []);
+	       * // => [4, 9]
+	       *
+	       * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
+	       *   (result[value] || (result[value] = [])).push(key);
+	       * }, {});
+	       * // => { '1': ['a', 'c'], '2': ['b'] }
+	       */
 
-	  var sMax = null;
-	  if (s) {
-	    s.parent = null;
-	    sMax = this.maxNode(s);
-	    this.splay(sMax);
-	    this._root = sMax;
-	  }
-	  if (t) {
-	    if (s) { sMax.right = t; }
-	    else { this._root = t; }
-	    t.parent = sMax;
-	  }
+	      function transform(object, iteratee, accumulator) {
+	        var isArr = isArray(object),
+	            isArrLike = isArr || isBuffer(object) || isTypedArray(object);
+	        iteratee = getIteratee(iteratee, 4);
 
-	  this._size--;
-	};
+	        if (accumulator == null) {
+	          var Ctor = object && object.constructor;
 
-	/**
-	 * Removes and returns the node with smallest key
-	 * @return {?Node}
-	 */
-	SplayTree.prototype.pop = function pop () {
-	  var node = this._root, returnValue = null;
-	  if (node) {
-	    while (node.left) { node = node.left; }
-	    returnValue = { key: node.key, data: node.data };
-	    this.remove(node.key);
-	  }
-	  return returnValue;
-	};
+	          if (isArrLike) {
+	            accumulator = isArr ? new Ctor() : [];
+	          } else if (isObject(object)) {
+	            accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
+	          } else {
+	            accumulator = {};
+	          }
+	        }
 
+	        (isArrLike ? arrayEach : baseForOwn)(object, function (value, index, object) {
+	          return iteratee(accumulator, value, index, object);
+	        });
+	        return accumulator;
+	      }
+	      /**
+	       * Removes the property at `path` of `object`.
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Object
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The path of the property to unset.
+	       * @returns {boolean} Returns `true` if the property is deleted, else `false`.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c': 7 } }] };
+	       * _.unset(object, 'a[0].b.c');
+	       * // => true
+	       *
+	       * console.log(object);
+	       * // => { 'a': [{ 'b': {} }] };
+	       *
+	       * _.unset(object, ['a', '0', 'b', 'c']);
+	       * // => true
+	       *
+	       * console.log(object);
+	       * // => { 'a': [{ 'b': {} }] };
+	       */
 
-	/* eslint-disable class-methods-use-this */
 
-	/**
-	 * Successor node
-	 * @param{Node} node
-	 * @return {?Node}
-	 */
-	SplayTree.prototype.next = function next (node) {
-	  var successor = node;
-	  if (successor) {
-	    if (successor.right) {
-	      successor = successor.right;
-	      while (successor && successor.left) { successor = successor.left; }
-	    } else {
-	      successor = node.parent;
-	      while (successor && successor.right === node) {
-	        node = successor; successor = successor.parent;
+	      function unset(object, path) {
+	        return object == null ? true : baseUnset(object, path);
 	      }
-	    }
-	  }
-	  return successor;
-	};
+	      /**
+	       * This method is like `_.set` except that accepts `updater` to produce the
+	       * value to set. Use `_.updateWith` to customize `path` creation. The `updater`
+	       * is invoked with one argument: (value).
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.6.0
+	       * @category Object
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The path of the property to set.
+	       * @param {Function} updater The function to produce the updated value.
+	       * @returns {Object} Returns `object`.
+	       * @example
+	       *
+	       * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+	       *
+	       * _.update(object, 'a[0].b.c', function(n) { return n * n; });
+	       * console.log(object.a[0].b.c);
+	       * // => 9
+	       *
+	       * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });
+	       * console.log(object.x[0].y.z);
+	       * // => 0
+	       */
 
 
-	/**
-	 * Predecessor node
-	 * @param{Node} node
-	 * @return {?Node}
-	 */
-	SplayTree.prototype.prev = function prev (node) {
-	  var predecessor = node;
-	  if (predecessor) {
-	    if (predecessor.left) {
-	      predecessor = predecessor.left;
-	      while (predecessor && predecessor.right) { predecessor = predecessor.right; }
-	    } else {
-	      predecessor = node.parent;
-	      while (predecessor && predecessor.left === node) {
-	        node = predecessor;
-	        predecessor = predecessor.parent;
+	      function update(object, path, updater) {
+	        return object == null ? object : baseUpdate(object, path, castFunction(updater));
 	      }
-	    }
-	  }
-	  return predecessor;
-	};
-	/* eslint-enable class-methods-use-this */
+	      /**
+	       * This method is like `_.update` except that it accepts `customizer` which is
+	       * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
+	       * path creation is handled by the method instead. The `customizer` is invoked
+	       * with three arguments: (nsValue, key, nsObject).
+	       *
+	       * **Note:** This method mutates `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.6.0
+	       * @category Object
+	       * @param {Object} object The object to modify.
+	       * @param {Array|string} path The path of the property to set.
+	       * @param {Function} updater The function to produce the updated value.
+	       * @param {Function} [customizer] The function to customize assigned values.
+	       * @returns {Object} Returns `object`.
+	       * @example
+	       *
+	       * var object = {};
+	       *
+	       * _.updateWith(object, '[0][1]', _.constant('a'), Object);
+	       * // => { '0': { '1': 'a' } }
+	       */
 
 
-	/**
-	 * @param{forEachCallback} callback
-	 * @return {SplayTree}
-	 */
-	SplayTree.prototype.forEach = function forEach (callback) {
-	  var current = this._root;
-	  var s = [], done = false, i = 0;
+	      function updateWith(object, path, updater, customizer) {
+	        customizer = typeof customizer == 'function' ? customizer : undefined$1;
+	        return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);
+	      }
+	      /**
+	       * Creates an array of the own enumerable string keyed property values of `object`.
+	       *
+	       * **Note:** Non-object values are coerced to objects.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property values.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.values(new Foo);
+	       * // => [1, 2] (iteration order is not guaranteed)
+	       *
+	       * _.values('hi');
+	       * // => ['h', 'i']
+	       */
 
-	  while (!done) {
-	    // Reach the left most Node of the current Node
-	    if (current) {
-	      // Place pointer to a tree node on the stack
-	      // before traversing the node's left subtree
-	      s.push(current);
-	      current = current.left;
-	    } else {
-	      // BackTrack from the empty subtree and visit the Node
-	      // at the top of the stack; however, if the stack is
-	      // empty you are done
-	      if (s.length > 0) {
-	        current = s.pop();
-	        callback(current, i++);
-
-	        // We have visited the node and its left
-	        // subtree. Now, it's right subtree's turn
-	        current = current.right;
-	      } else { done = true; }
-	    }
-	  }
-	  return this;
-	};
 
+	      function values(object) {
+	        return object == null ? [] : baseValues(object, keys(object));
+	      }
+	      /**
+	       * Creates an array of the own and inherited enumerable string keyed property
+	       * values of `object`.
+	       *
+	       * **Note:** Non-object values are coerced to objects.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Object
+	       * @param {Object} object The object to query.
+	       * @returns {Array} Returns the array of property values.
+	       * @example
+	       *
+	       * function Foo() {
+	       *   this.a = 1;
+	       *   this.b = 2;
+	       * }
+	       *
+	       * Foo.prototype.c = 3;
+	       *
+	       * _.valuesIn(new Foo);
+	       * // => [1, 2, 3] (iteration order is not guaranteed)
+	       */
 
-	/**
-	 * Walk key range from `low` to `high`. Stops if `fn` returns a value.
-	 * @param{Key}    low
-	 * @param{Key}    high
-	 * @param{Function} fn
-	 * @param{*?}     ctx
-	 * @return {SplayTree}
-	 */
-	SplayTree.prototype.range = function range (low, high, fn, ctx) {
-	  var Q = [];
-	  var compare = this._compare;
-	  var node = this._root, cmp;
 
-	  while (Q.length !== 0 || node) {
-	    if (node) {
-	      Q.push(node);
-	      node = node.left;
-	    } else {
-	      node = Q.pop();
-	      cmp = compare(node.key, high);
-	      if (cmp > 0) {
-	        break;
-	      } else if (compare(node.key, low) >= 0) {
-	        if (fn.call(ctx, node)) { return this; } // stop if smth is returned
+	      function valuesIn(object) {
+	        return object == null ? [] : baseValues(object, keysIn(object));
 	      }
-	      node = node.right;
-	    }
-	  }
-	  return this;
-	};
+	      /*------------------------------------------------------------------------*/
 
-	/**
-	 * Returns all keys in order
-	 * @return {Array<Key>}
-	 */
-	SplayTree.prototype.keys = function keys () {
-	  var current = this._root;
-	  var s = [], r = [], done = false;
+	      /**
+	       * Clamps `number` within the inclusive `lower` and `upper` bounds.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Number
+	       * @param {number} number The number to clamp.
+	       * @param {number} [lower] The lower bound.
+	       * @param {number} upper The upper bound.
+	       * @returns {number} Returns the clamped number.
+	       * @example
+	       *
+	       * _.clamp(-10, -5, 5);
+	       * // => -5
+	       *
+	       * _.clamp(10, -5, 5);
+	       * // => 5
+	       */
 
-	  while (!done) {
-	    if (current) {
-	      s.push(current);
-	      current = current.left;
-	    } else {
-	      if (s.length > 0) {
-	        current = s.pop();
-	        r.push(current.key);
-	        current = current.right;
-	      } else { done = true; }
-	    }
-	  }
-	  return r;
-	};
 
+	      function clamp(number, lower, upper) {
+	        if (upper === undefined$1) {
+	          upper = lower;
+	          lower = undefined$1;
+	        }
 
-	/**
-	 * Returns `data` fields of all nodes in order.
-	 * @return {Array<Value>}
-	 */
-	SplayTree.prototype.values = function values () {
-	  var current = this._root;
-	  var s = [], r = [], done = false;
+	        if (upper !== undefined$1) {
+	          upper = toNumber(upper);
+	          upper = upper === upper ? upper : 0;
+	        }
 
-	  while (!done) {
-	    if (current) {
-	      s.push(current);
-	      current = current.left;
-	    } else {
-	      if (s.length > 0) {
-	        current = s.pop();
-	        r.push(current.data);
-	        current = current.right;
-	      } else { done = true; }
-	    }
-	  }
-	  return r;
-	};
+	        if (lower !== undefined$1) {
+	          lower = toNumber(lower);
+	          lower = lower === lower ? lower : 0;
+	        }
 
+	        return baseClamp(toNumber(number), lower, upper);
+	      }
+	      /**
+	       * Checks if `n` is between `start` and up to, but not including, `end`. If
+	       * `end` is not specified, it's set to `start` with `start` then set to `0`.
+	       * If `start` is greater than `end` the params are swapped to support
+	       * negative ranges.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.3.0
+	       * @category Number
+	       * @param {number} number The number to check.
+	       * @param {number} [start=0] The start of the range.
+	       * @param {number} end The end of the range.
+	       * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
+	       * @see _.range, _.rangeRight
+	       * @example
+	       *
+	       * _.inRange(3, 2, 4);
+	       * // => true
+	       *
+	       * _.inRange(4, 8);
+	       * // => true
+	       *
+	       * _.inRange(4, 2);
+	       * // => false
+	       *
+	       * _.inRange(2, 2);
+	       * // => false
+	       *
+	       * _.inRange(1.2, 2);
+	       * // => true
+	       *
+	       * _.inRange(5.2, 4);
+	       * // => false
+	       *
+	       * _.inRange(-3, -2, -6);
+	       * // => true
+	       */
 
-	/**
-	 * Returns node at given index
-	 * @param{number} index
-	 * @return {?Node}
-	 */
-	SplayTree.prototype.at = function at (index) {
-	  // removed after a consideration, more misleading than useful
-	  // index = index % this.size;
-	  // if (index < 0) index = this.size - index;
 
-	  var current = this._root;
-	  var s = [], done = false, i = 0;
+	      function inRange(number, start, end) {
+	        start = toFinite(start);
 
-	  while (!done) {
-	    if (current) {
-	      s.push(current);
-	      current = current.left;
-	    } else {
-	      if (s.length > 0) {
-	        current = s.pop();
-	        if (i === index) { return current; }
-	        i++;
-	        current = current.right;
-	      } else { done = true; }
-	    }
-	  }
-	  return null;
-	};
+	        if (end === undefined$1) {
+	          end = start;
+	          start = 0;
+	        } else {
+	          end = toFinite(end);
+	        }
 
-	/**
-	 * Bulk-load items. Both array have to be same size
-	 * @param{Array<Key>}  keys
-	 * @param{Array<Value>}[values]
-	 * @param{Boolean}     [presort=false] Pre-sort keys and values, using
-	 *                                       tree's comparator. Sorting is done
-	 *                                       in-place
-	 * @return {AVLTree}
-	 */
-	SplayTree.prototype.load = function load (keys, values, presort) {
-	    if ( keys === void 0 ) keys = [];
-	    if ( values === void 0 ) values = [];
-	    if ( presort === void 0 ) presort = false;
-
-	  if (this._size !== 0) { throw new Error('bulk-load: tree is not empty'); }
-	  var size = keys.length;
-	  if (presort) { sort(keys, values, 0, size - 1, this._compare); }
-	  this._root = loadRecursive(null, keys, values, 0, size);
-	  this._size = size;
-	  return this;
-	};
+	        number = toNumber(number);
+	        return baseInRange(number, start, end);
+	      }
+	      /**
+	       * Produces a random number between the inclusive `lower` and `upper` bounds.
+	       * If only one argument is provided a number between `0` and the given number
+	       * is returned. If `floating` is `true`, or either `lower` or `upper` are
+	       * floats, a floating-point number is returned instead of an integer.
+	       *
+	       * **Note:** JavaScript follows the IEEE-754 standard for resolving
+	       * floating-point values which can produce unexpected results.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.7.0
+	       * @category Number
+	       * @param {number} [lower=0] The lower bound.
+	       * @param {number} [upper=1] The upper bound.
+	       * @param {boolean} [floating] Specify returning a floating-point number.
+	       * @returns {number} Returns the random number.
+	       * @example
+	       *
+	       * _.random(0, 5);
+	       * // => an integer between 0 and 5
+	       *
+	       * _.random(5);
+	       * // => also an integer between 0 and 5
+	       *
+	       * _.random(5, true);
+	       * // => a floating-point number between 0 and 5
+	       *
+	       * _.random(1.2, 5.2);
+	       * // => a floating-point number between 1.2 and 5.2
+	       */
 
 
-	SplayTree.prototype.min = function min () {
-	  var node = this.minNode(this._root);
-	  if (node) { return node.key; }
-	  else    { return null; }
-	};
+	      function random(lower, upper, floating) {
+	        if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
+	          upper = floating = undefined$1;
+	        }
 
+	        if (floating === undefined$1) {
+	          if (typeof upper == 'boolean') {
+	            floating = upper;
+	            upper = undefined$1;
+	          } else if (typeof lower == 'boolean') {
+	            floating = lower;
+	            lower = undefined$1;
+	          }
+	        }
 
-	SplayTree.prototype.max = function max () {
-	  var node = this.maxNode(this._root);
-	  if (node) { return node.key; }
-	  else    { return null; }
-	};
+	        if (lower === undefined$1 && upper === undefined$1) {
+	          lower = 0;
+	          upper = 1;
+	        } else {
+	          lower = toFinite(lower);
 
-	SplayTree.prototype.isEmpty = function isEmpty () { return this._root === null; };
-	prototypeAccessors.size.get = function () { return this._size; };
+	          if (upper === undefined$1) {
+	            upper = lower;
+	            lower = 0;
+	          } else {
+	            upper = toFinite(upper);
+	          }
+	        }
 
+	        if (lower > upper) {
+	          var temp = lower;
+	          lower = upper;
+	          upper = temp;
+	        }
 
-	/**
-	 * Create a tree and load it with items
-	 * @param{Array<Key>}        keys
-	 * @param{Array<Value>?}      [values]
-
-	 * @param{Function?}          [comparator]
-	 * @param{Boolean?}           [presort=false] Pre-sort keys and values, using
-	 *                                             tree's comparator. Sorting is done
-	 *                                             in-place
-	 * @param{Boolean?}           [noDuplicates=false] Allow duplicates
-	 * @return {SplayTree}
-	 */
-	SplayTree.createTree = function createTree (keys, values, comparator, presort, noDuplicates) {
-	  return new SplayTree(comparator, noDuplicates).load(keys, values, presort);
-	};
+	        if (floating || lower % 1 || upper % 1) {
+	          var rand = nativeRandom();
+	          return nativeMin(lower + rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1))), upper);
+	        }
 
-	Object.defineProperties( SplayTree.prototype, prototypeAccessors );
+	        return baseRandom(lower, upper);
+	      }
+	      /*------------------------------------------------------------------------*/
 
+	      /**
+	       * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the camel cased string.
+	       * @example
+	       *
+	       * _.camelCase('Foo Bar');
+	       * // => 'fooBar'
+	       *
+	       * _.camelCase('--foo-bar--');
+	       * // => 'fooBar'
+	       *
+	       * _.camelCase('__FOO_BAR__');
+	       * // => 'fooBar'
+	       */
 
-	function loadRecursive (parent, keys, values, start, end) {
-	  var size = end - start;
-	  if (size > 0) {
-	    var middle = start + Math.floor(size / 2);
-	    var key    = keys[middle];
-	    var data   = values[middle];
-	    var node   = { key: key, data: data, parent: parent };
-	    node.left    = loadRecursive(node, keys, values, start, middle);
-	    node.right   = loadRecursive(node, keys, values, middle + 1, end);
-	    return node;
-	  }
-	  return null;
-	}
 
+	      var camelCase = createCompounder(function (result, word, index) {
+	        word = word.toLowerCase();
+	        return result + (index ? capitalize(word) : word);
+	      });
+	      /**
+	       * Converts the first character of `string` to upper case and the remaining
+	       * to lower case.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to capitalize.
+	       * @returns {string} Returns the capitalized string.
+	       * @example
+	       *
+	       * _.capitalize('FRED');
+	       * // => 'Fred'
+	       */
 
-	function sort(keys, values, left, right, compare) {
-	  if (left >= right) { return; }
+	      function capitalize(string) {
+	        return upperFirst(toString(string).toLowerCase());
+	      }
+	      /**
+	       * Deburrs `string` by converting
+	       * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
+	       * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
+	       * letters to basic Latin letters and removing
+	       * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to deburr.
+	       * @returns {string} Returns the deburred string.
+	       * @example
+	       *
+	       * _.deburr('déjà vu');
+	       * // => 'deja vu'
+	       */
 
-	  var pivot = keys[(left + right) >> 1];
-	  var i = left - 1;
-	  var j = right + 1;
 
-	  while (true) {
-	    do { i++; } while (compare(keys[i], pivot) < 0);
-	    do { j--; } while (compare(keys[j], pivot) > 0);
-	    if (i >= j) { break; }
+	      function deburr(string) {
+	        string = toString(string);
+	        return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
+	      }
+	      /**
+	       * Checks if `string` ends with the given target string.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to inspect.
+	       * @param {string} [target] The string to search for.
+	       * @param {number} [position=string.length] The position to search up to.
+	       * @returns {boolean} Returns `true` if `string` ends with `target`,
+	       *  else `false`.
+	       * @example
+	       *
+	       * _.endsWith('abc', 'c');
+	       * // => true
+	       *
+	       * _.endsWith('abc', 'b');
+	       * // => false
+	       *
+	       * _.endsWith('abc', 'b', 2);
+	       * // => true
+	       */
 
-	    var tmp = keys[i];
-	    keys[i] = keys[j];
-	    keys[j] = tmp;
 
-	    tmp = values[i];
-	    values[i] = values[j];
-	    values[j] = tmp;
-	  }
+	      function endsWith(string, target, position) {
+	        string = toString(string);
+	        target = baseToString(target);
+	        var length = string.length;
+	        position = position === undefined$1 ? length : baseClamp(toInteger(position), 0, length);
+	        var end = position;
+	        position -= target.length;
+	        return position >= 0 && string.slice(position, end) == target;
+	      }
+	      /**
+	       * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
+	       * corresponding HTML entities.
+	       *
+	       * **Note:** No other characters are escaped. To escape additional
+	       * characters use a third-party library like [_he_](https://mths.be/he).
+	       *
+	       * Though the ">" character is escaped for symmetry, characters like
+	       * ">" and "/" don't need escaping in HTML and have no special meaning
+	       * unless they're part of a tag or unquoted attribute value. See
+	       * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
+	       * (under "semi-related fun fact") for more details.
+	       *
+	       * When working with HTML you should always
+	       * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
+	       * XSS vectors.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category String
+	       * @param {string} [string=''] The string to escape.
+	       * @returns {string} Returns the escaped string.
+	       * @example
+	       *
+	       * _.escape('fred, barney, & pebbles');
+	       * // => 'fred, barney, &amp; pebbles'
+	       */
 
-	  sort(keys, values,  left,     j, compare);
-	  sort(keys, values, j + 1, right, compare);
-	}
 
-	var NORMAL               = 0;
-	var NON_CONTRIBUTING     = 1;
-	var SAME_TRANSITION      = 2;
-	var DIFFERENT_TRANSITION = 3;
+	      function escape(string) {
+	        string = toString(string);
+	        return string && reHasUnescapedHtml.test(string) ? string.replace(reUnescapedHtml, escapeHtmlChar) : string;
+	      }
+	      /**
+	       * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
+	       * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to escape.
+	       * @returns {string} Returns the escaped string.
+	       * @example
+	       *
+	       * _.escapeRegExp('[lodash](https://lodash.com/)');
+	       * // => '\[lodash\]\(https://lodash\.com/\)'
+	       */
 
-	var INTERSECTION = 0;
-	var UNION        = 1;
-	var DIFFERENCE   = 2;
-	var XOR          = 3;
 
-	/**
-	 * @param  {SweepEvent} event
-	 * @param  {SweepEvent} prev
-	 * @param  {Operation} operation
-	 */
-	function computeFields (event, prev, operation) {
-	  // compute inOut and otherInOut fields
-	  if (prev === null) {
-	    event.inOut      = false;
-	    event.otherInOut = true;
+	      function escapeRegExp(string) {
+	        string = toString(string);
+	        return string && reHasRegExpChar.test(string) ? string.replace(reRegExpChar, '\\$&') : string;
+	      }
+	      /**
+	       * Converts `string` to
+	       * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the kebab cased string.
+	       * @example
+	       *
+	       * _.kebabCase('Foo Bar');
+	       * // => 'foo-bar'
+	       *
+	       * _.kebabCase('fooBar');
+	       * // => 'foo-bar'
+	       *
+	       * _.kebabCase('__FOO_BAR__');
+	       * // => 'foo-bar'
+	       */
 
-	  // previous line segment in sweepline belongs to the same polygon
-	  } else {
-	    if (event.isSubject === prev.isSubject) {
-	      event.inOut      = !prev.inOut;
-	      event.otherInOut = prev.otherInOut;
 
-	    // previous line segment in sweepline belongs to the clipping polygon
-	    } else {
-	      event.inOut      = !prev.otherInOut;
-	      event.otherInOut = prev.isVertical() ? !prev.inOut : prev.inOut;
-	    }
+	      var kebabCase = createCompounder(function (result, word, index) {
+	        return result + (index ? '-' : '') + word.toLowerCase();
+	      });
+	      /**
+	       * Converts `string`, as space separated words, to lower case.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the lower cased string.
+	       * @example
+	       *
+	       * _.lowerCase('--Foo-Bar--');
+	       * // => 'foo bar'
+	       *
+	       * _.lowerCase('fooBar');
+	       * // => 'foo bar'
+	       *
+	       * _.lowerCase('__FOO_BAR__');
+	       * // => 'foo bar'
+	       */
 
-	    // compute prevInResult field
-	    if (prev) {
-	      event.prevInResult = (!inResult(prev, operation) || prev.isVertical())
-	        ? prev.prevInResult : prev;
-	    }
-	  }
+	      var lowerCase = createCompounder(function (result, word, index) {
+	        return result + (index ? ' ' : '') + word.toLowerCase();
+	      });
+	      /**
+	       * Converts the first character of `string` to lower case.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the converted string.
+	       * @example
+	       *
+	       * _.lowerFirst('Fred');
+	       * // => 'fred'
+	       *
+	       * _.lowerFirst('FRED');
+	       * // => 'fRED'
+	       */
 
-	  // check if the line segment belongs to the Boolean operation
-	  var isInResult = inResult(event, operation);
-	  if (isInResult) {
-	    event.resultTransition = determineResultTransition(event, operation);
-	  } else {
-	    event.resultTransition = 0;
-	  }
-	}
-
-
-	/* eslint-disable indent */
-	function inResult(event, operation) {
-	  switch (event.type) {
-	    case NORMAL:
-	      switch (operation) {
-	        case INTERSECTION:
-	          return !event.otherInOut;
-	        case UNION:
-	          return event.otherInOut;
-	        case DIFFERENCE:
-	          // return (event.isSubject && !event.otherInOut) ||
-	          //         (!event.isSubject && event.otherInOut);
-	          return (event.isSubject && event.otherInOut) ||
-	                  (!event.isSubject && !event.otherInOut);
-	        case XOR:
-	          return true;
-	      }
-	      break;
-	    case SAME_TRANSITION:
-	      return operation === INTERSECTION || operation === UNION;
-	    case DIFFERENT_TRANSITION:
-	      return operation === DIFFERENCE;
-	    case NON_CONTRIBUTING:
-	      return false;
-	  }
-	  return false;
-	}
-	/* eslint-enable indent */
+	      var lowerFirst = createCaseFirst('toLowerCase');
+	      /**
+	       * Pads `string` on the left and right sides if it's shorter than `length`.
+	       * Padding characters are truncated if they can't be evenly divided by `length`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to pad.
+	       * @param {number} [length=0] The padding length.
+	       * @param {string} [chars=' '] The string used as padding.
+	       * @returns {string} Returns the padded string.
+	       * @example
+	       *
+	       * _.pad('abc', 8);
+	       * // => '  abc   '
+	       *
+	       * _.pad('abc', 8, '_-');
+	       * // => '_-abc_-_'
+	       *
+	       * _.pad('abc', 3);
+	       * // => 'abc'
+	       */
 
+	      function pad(string, length, chars) {
+	        string = toString(string);
+	        length = toInteger(length);
+	        var strLength = length ? stringSize(string) : 0;
 
-	function determineResultTransition(event, operation) {
-	  var thisIn = !event.inOut;
-	  var thatIn = !event.otherInOut;
+	        if (!length || strLength >= length) {
+	          return string;
+	        }
 
-	  var isIn;
-	  switch (operation) {
-	    case INTERSECTION:
-	      isIn = thisIn && thatIn; break;
-	    case UNION:
-	      isIn = thisIn || thatIn; break;
-	    case XOR:
-	      isIn = thisIn ^ thatIn; break;
-	    case DIFFERENCE:
-	      if (event.isSubject) {
-	        isIn = thisIn && !thatIn;
-	      } else {
-	        isIn = thatIn && !thisIn;
+	        var mid = (length - strLength) / 2;
+	        return createPadding(nativeFloor(mid), chars) + string + createPadding(nativeCeil(mid), chars);
 	      }
-	      break;
-	  }
-	  return isIn ? +1 : -1;
-	}
+	      /**
+	       * Pads `string` on the right side if it's shorter than `length`. Padding
+	       * characters are truncated if they exceed `length`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to pad.
+	       * @param {number} [length=0] The padding length.
+	       * @param {string} [chars=' '] The string used as padding.
+	       * @returns {string} Returns the padded string.
+	       * @example
+	       *
+	       * _.padEnd('abc', 6);
+	       * // => 'abc   '
+	       *
+	       * _.padEnd('abc', 6, '_-');
+	       * // => 'abc_-_'
+	       *
+	       * _.padEnd('abc', 3);
+	       * // => 'abc'
+	       */
 
-	var SweepEvent = function SweepEvent (point, left, otherEvent, isSubject, edgeType) {
 
-	  /**
-	   * Is left endpoint?
-	   * @type {Boolean}
-	   */
-	  this.left = left;
+	      function padEnd(string, length, chars) {
+	        string = toString(string);
+	        length = toInteger(length);
+	        var strLength = length ? stringSize(string) : 0;
+	        return length && strLength < length ? string + createPadding(length - strLength, chars) : string;
+	      }
+	      /**
+	       * Pads `string` on the left side if it's shorter than `length`. Padding
+	       * characters are truncated if they exceed `length`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to pad.
+	       * @param {number} [length=0] The padding length.
+	       * @param {string} [chars=' '] The string used as padding.
+	       * @returns {string} Returns the padded string.
+	       * @example
+	       *
+	       * _.padStart('abc', 6);
+	       * // => '   abc'
+	       *
+	       * _.padStart('abc', 6, '_-');
+	       * // => '_-_abc'
+	       *
+	       * _.padStart('abc', 3);
+	       * // => 'abc'
+	       */
 
-	  /**
-	   * @type {Array.<Number>}
-	   */
-	  this.point = point;
 
-	  /**
-	   * Other edge reference
-	   * @type {SweepEvent}
-	   */
-	  this.otherEvent = otherEvent;
+	      function padStart(string, length, chars) {
+	        string = toString(string);
+	        length = toInteger(length);
+	        var strLength = length ? stringSize(string) : 0;
+	        return length && strLength < length ? createPadding(length - strLength, chars) + string : string;
+	      }
+	      /**
+	       * Converts `string` to an integer of the specified radix. If `radix` is
+	       * `undefined` or `0`, a `radix` of `10` is used unless `value` is a
+	       * hexadecimal, in which case a `radix` of `16` is used.
+	       *
+	       * **Note:** This method aligns with the
+	       * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 1.1.0
+	       * @category String
+	       * @param {string} string The string to convert.
+	       * @param {number} [radix=10] The radix to interpret `value` by.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {number} Returns the converted integer.
+	       * @example
+	       *
+	       * _.parseInt('08');
+	       * // => 8
+	       *
+	       * _.map(['6', '08', '10'], _.parseInt);
+	       * // => [6, 8, 10]
+	       */
 
-	  /**
-	   * Belongs to source or clipping polygon
-	   * @type {Boolean}
-	   */
-	  this.isSubject = isSubject;
 
-	  /**
-	   * Edge contribution type
-	   * @type {Number}
-	   */
-	  this.type = edgeType || NORMAL;
+	      function parseInt(string, radix, guard) {
+	        if (guard || radix == null) {
+	          radix = 0;
+	        } else if (radix) {
+	          radix = +radix;
+	        }
+
+	        return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);
+	      }
+	      /**
+	       * Repeats the given string `n` times.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to repeat.
+	       * @param {number} [n=1] The number of times to repeat the string.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {string} Returns the repeated string.
+	       * @example
+	       *
+	       * _.repeat('*', 3);
+	       * // => '***'
+	       *
+	       * _.repeat('abc', 2);
+	       * // => 'abcabc'
+	       *
+	       * _.repeat('abc', 0);
+	       * // => ''
+	       */
 
 
-	  /**
-	   * In-out transition for the sweepline crossing polygon
-	   * @type {Boolean}
-	   */
-	  this.inOut = false;
+	      function repeat(string, n, guard) {
+	        if (guard ? isIterateeCall(string, n, guard) : n === undefined$1) {
+	          n = 1;
+	        } else {
+	          n = toInteger(n);
+	        }
 
+	        return baseRepeat(toString(string), n);
+	      }
+	      /**
+	       * Replaces matches for `pattern` in `string` with `replacement`.
+	       *
+	       * **Note:** This method is based on
+	       * [`String#replace`](https://mdn.io/String/replace).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to modify.
+	       * @param {RegExp|string} pattern The pattern to replace.
+	       * @param {Function|string} replacement The match replacement.
+	       * @returns {string} Returns the modified string.
+	       * @example
+	       *
+	       * _.replace('Hi Fred', 'Fred', 'Barney');
+	       * // => 'Hi Barney'
+	       */
 
-	  /**
-	   * @type {Boolean}
-	   */
-	  this.otherInOut = false;
 
-	  /**
-	   * Previous event in result?
-	   * @type {SweepEvent}
-	   */
-	  this.prevInResult = null;
+	      function replace() {
+	        var args = arguments,
+	            string = toString(args[0]);
+	        return args.length < 3 ? string : string.replace(args[1], args[2]);
+	      }
+	      /**
+	       * Converts `string` to
+	       * [snake case](https://en.wikipedia.org/wiki/Snake_case).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the snake cased string.
+	       * @example
+	       *
+	       * _.snakeCase('Foo Bar');
+	       * // => 'foo_bar'
+	       *
+	       * _.snakeCase('fooBar');
+	       * // => 'foo_bar'
+	       *
+	       * _.snakeCase('--FOO-BAR--');
+	       * // => 'foo_bar'
+	       */
 
-	  /**
-	   * Type of result transition (0 = not in result, +1 = out-in, -1, in-out)
-	   * @type {Number}
-	   */
-	  this.resultTransition = 0;
 
-	  // connection step
+	      var snakeCase = createCompounder(function (result, word, index) {
+	        return result + (index ? '_' : '') + word.toLowerCase();
+	      });
+	      /**
+	       * Splits `string` by `separator`.
+	       *
+	       * **Note:** This method is based on
+	       * [`String#split`](https://mdn.io/String/split).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to split.
+	       * @param {RegExp|string} separator The separator pattern to split by.
+	       * @param {number} [limit] The length to truncate results to.
+	       * @returns {Array} Returns the string segments.
+	       * @example
+	       *
+	       * _.split('a-b-c', '-', 2);
+	       * // => ['a', 'b']
+	       */
 
-	  /**
-	   * @type {Number}
-	   */
-	  this.otherPos = -1;
+	      function split(string, separator, limit) {
+	        if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
+	          separator = limit = undefined$1;
+	        }
 
-	  /**
-	   * @type {Number}
-	   */
-	  this.outputContourId = -1;
+	        limit = limit === undefined$1 ? MAX_ARRAY_LENGTH : limit >>> 0;
 
-	  this.isExteriorRing = true; // TODO: Looks unused, remove?
-	};
+	        if (!limit) {
+	          return [];
+	        }
 
-	var prototypeAccessors$1 = { inResult: { configurable: true } };
+	        string = toString(string);
 
+	        if (string && (typeof separator == 'string' || separator != null && !isRegExp(separator))) {
+	          separator = baseToString(separator);
 
-	/**
-	 * @param{Array.<Number>}p
-	 * @return {Boolean}
-	 */
-	SweepEvent.prototype.isBelow = function isBelow (p) {
-	  var p0 = this.point, p1 = this.otherEvent.point;
-	  return this.left
-	    ? (p0[0] - p[0]) * (p1[1] - p[1]) - (p1[0] - p[0]) * (p0[1] - p[1]) > 0
-	    // signedArea(this.point, this.otherEvent.point, p) > 0 :
-	    : (p1[0] - p[0]) * (p0[1] - p[1]) - (p0[0] - p[0]) * (p1[1] - p[1]) > 0;
-	    //signedArea(this.otherEvent.point, this.point, p) > 0;
-	};
+	          if (!separator && hasUnicode(string)) {
+	            return castSlice(stringToArray(string), 0, limit);
+	          }
+	        }
 
+	        return string.split(separator, limit);
+	      }
+	      /**
+	       * Converts `string` to
+	       * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.1.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the start cased string.
+	       * @example
+	       *
+	       * _.startCase('--foo-bar--');
+	       * // => 'Foo Bar'
+	       *
+	       * _.startCase('fooBar');
+	       * // => 'Foo Bar'
+	       *
+	       * _.startCase('__FOO_BAR__');
+	       * // => 'FOO BAR'
+	       */
 
-	/**
-	 * @param{Array.<Number>}p
-	 * @return {Boolean}
-	 */
-	SweepEvent.prototype.isAbove = function isAbove (p) {
-	  return !this.isBelow(p);
-	};
 
+	      var startCase = createCompounder(function (result, word, index) {
+	        return result + (index ? ' ' : '') + upperFirst(word);
+	      });
+	      /**
+	       * Checks if `string` starts with the given target string.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to inspect.
+	       * @param {string} [target] The string to search for.
+	       * @param {number} [position=0] The position to search from.
+	       * @returns {boolean} Returns `true` if `string` starts with `target`,
+	       *  else `false`.
+	       * @example
+	       *
+	       * _.startsWith('abc', 'a');
+	       * // => true
+	       *
+	       * _.startsWith('abc', 'b');
+	       * // => false
+	       *
+	       * _.startsWith('abc', 'b', 1);
+	       * // => true
+	       */
 
-	/**
-	 * @return {Boolean}
-	 */
-	SweepEvent.prototype.isVertical = function isVertical () {
-	  return this.point[0] === this.otherEvent.point[0];
-	};
+	      function startsWith(string, target, position) {
+	        string = toString(string);
+	        position = position == null ? 0 : baseClamp(toInteger(position), 0, string.length);
+	        target = baseToString(target);
+	        return string.slice(position, position + target.length) == target;
+	      }
+	      /**
+	       * Creates a compiled template function that can interpolate data properties
+	       * in "interpolate" delimiters, HTML-escape interpolated data properties in
+	       * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
+	       * properties may be accessed as free variables in the template. If a setting
+	       * object is given, it takes precedence over `_.templateSettings` values.
+	       *
+	       * **Note:** In the development build `_.template` utilizes
+	       * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
+	       * for easier debugging.
+	       *
+	       * For more information on precompiling templates see
+	       * [lodash's custom builds documentation](https://lodash.com/custom-builds).
+	       *
+	       * For more information on Chrome extension sandboxes see
+	       * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category String
+	       * @param {string} [string=''] The template string.
+	       * @param {Object} [options={}] The options object.
+	       * @param {RegExp} [options.escape=_.templateSettings.escape]
+	       *  The HTML "escape" delimiter.
+	       * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]
+	       *  The "evaluate" delimiter.
+	       * @param {Object} [options.imports=_.templateSettings.imports]
+	       *  An object to import into the template as free variables.
+	       * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]
+	       *  The "interpolate" delimiter.
+	       * @param {string} [options.sourceURL='lodash.templateSources[n]']
+	       *  The sourceURL of the compiled template.
+	       * @param {string} [options.variable='obj']
+	       *  The data object variable name.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Function} Returns the compiled template function.
+	       * @example
+	       *
+	       * // Use the "interpolate" delimiter to create a compiled template.
+	       * var compiled = _.template('hello <%= user %>!');
+	       * compiled({ 'user': 'fred' });
+	       * // => 'hello fred!'
+	       *
+	       * // Use the HTML "escape" delimiter to escape data property values.
+	       * var compiled = _.template('<b><%- value %></b>');
+	       * compiled({ 'value': '<script>' });
+	       * // => '<b>&lt;script&gt;</b>'
+	       *
+	       * // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
+	       * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
+	       * compiled({ 'users': ['fred', 'barney'] });
+	       * // => '<li>fred</li><li>barney</li>'
+	       *
+	       * // Use the internal `print` function in "evaluate" delimiters.
+	       * var compiled = _.template('<% print("hello " + user); %>!');
+	       * compiled({ 'user': 'barney' });
+	       * // => 'hello barney!'
+	       *
+	       * // Use the ES template literal delimiter as an "interpolate" delimiter.
+	       * // Disable support by replacing the "interpolate" delimiter.
+	       * var compiled = _.template('hello ${ user }!');
+	       * compiled({ 'user': 'pebbles' });
+	       * // => 'hello pebbles!'
+	       *
+	       * // Use backslashes to treat delimiters as plain text.
+	       * var compiled = _.template('<%= "\\<%- value %\\>" %>');
+	       * compiled({ 'value': 'ignored' });
+	       * // => '<%- value %>'
+	       *
+	       * // Use the `imports` option to import `jQuery` as `jq`.
+	       * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
+	       * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
+	       * compiled({ 'users': ['fred', 'barney'] });
+	       * // => '<li>fred</li><li>barney</li>'
+	       *
+	       * // Use the `sourceURL` option to specify a custom sourceURL for the template.
+	       * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
+	       * compiled(data);
+	       * // => Find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector.
+	       *
+	       * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
+	       * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
+	       * compiled.source;
+	       * // => function(data) {
+	       * //   var __t, __p = '';
+	       * //   __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
+	       * //   return __p;
+	       * // }
+	       *
+	       * // Use custom template delimiters.
+	       * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
+	       * var compiled = _.template('hello {{ user }}!');
+	       * compiled({ 'user': 'mustache' });
+	       * // => 'hello mustache!'
+	       *
+	       * // Use the `source` property to inline compiled templates for meaningful
+	       * // line numbers in error messages and stack traces.
+	       * fs.writeFileSync(path.join(process.cwd(), 'jst.js'), '\
+	       *   var JST = {\
+	       *     "main": ' + _.template(mainText).source + '\
+	       *   };\
+	       * ');
+	       */
 
 
-	/**
-	 * Does event belong to result?
-	 * @return {Boolean}
-	 */
-	prototypeAccessors$1.inResult.get = function () {
-	  return this.resultTransition !== 0;
-	};
+	      function template(string, options, guard) {
+	        // Based on John Resig's `tmpl` implementation
+	        // (http://ejohn.org/blog/javascript-micro-templating/)
+	        // and Laura Doktorova's doT.js (https://github.com/olado/doT).
+	        var settings = lodash.templateSettings;
 
+	        if (guard && isIterateeCall(string, options, guard)) {
+	          options = undefined$1;
+	        }
 
-	SweepEvent.prototype.clone = function clone () {
-	  var copy = new SweepEvent(
-	    this.point, this.left, this.otherEvent, this.isSubject, this.type);
+	        string = toString(string);
+	        options = assignInWith({}, options, settings, customDefaultsAssignIn);
+	        var imports = assignInWith({}, options.imports, settings.imports, customDefaultsAssignIn),
+	            importsKeys = keys(imports),
+	            importsValues = baseValues(imports, importsKeys);
+	        var isEscaping,
+	            isEvaluating,
+	            index = 0,
+	            interpolate = options.interpolate || reNoMatch,
+	            source = "__p += '"; // Compile the regexp to match each delimiter.
 
-	  copy.contourId      = this.contourId;
-	  copy.resultTransition = this.resultTransition;
-	  copy.prevInResult   = this.prevInResult;
-	  copy.isExteriorRing = this.isExteriorRing;
-	  copy.inOut          = this.inOut;
-	  copy.otherInOut     = this.otherInOut;
+	        var reDelimiters = RegExp((options.escape || reNoMatch).source + '|' + interpolate.source + '|' + (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' + (options.evaluate || reNoMatch).source + '|$', 'g'); // Use a sourceURL for easier debugging.
+	        // The sourceURL gets injected into the source that's eval-ed, so be careful
+	        // to normalize all kinds of whitespace, so e.g. newlines (and unicode versions of it) can't sneak in
+	        // and escape the comment, thus injecting code that gets evaled.
 
-	  return copy;
-	};
+	        var sourceURL = '//# sourceURL=' + (hasOwnProperty.call(options, 'sourceURL') ? (options.sourceURL + '').replace(/\s/g, ' ') : 'lodash.templateSources[' + ++templateCounter + ']') + '\n';
+	        string.replace(reDelimiters, function (match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
+	          interpolateValue || (interpolateValue = esTemplateValue); // Escape characters that can't be included in string literals.
 
-	Object.defineProperties( SweepEvent.prototype, prototypeAccessors$1 );
+	          source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar); // Replace delimiters with snippets.
 
-	function equals(p1, p2) {
-	  if (p1[0] === p2[0]) {
-	    if (p1[1] === p2[1]) {
-	      return true;
-	    } else {
-	      return false;
-	    }
-	  }
-	  return false;
-	}
+	          if (escapeValue) {
+	            isEscaping = true;
+	            source += "' +\n__e(" + escapeValue + ") +\n'";
+	          }
 
-	// const EPSILON = 1e-9;
-	// const abs = Math.abs;
-	// TODO https://github.com/w8r/martinez/issues/6#issuecomment-262847164
-	// Precision problem.
-	//
-	// module.exports = function equals(p1, p2) {
-	//   return abs(p1[0] - p2[0]) <= EPSILON && abs(p1[1] - p2[1]) <= EPSILON;
-	// };
+	          if (evaluateValue) {
+	            isEvaluating = true;
+	            source += "';\n" + evaluateValue + ";\n__p += '";
+	          }
 
-	var epsilon$1 = 1.1102230246251565e-16;
-	var splitter = 134217729;
-	var resulterrbound = (3 + 8 * epsilon$1) * epsilon$1;
-
-	// fast_expansion_sum_zeroelim routine from oritinal code
-	function sum$1(elen, e, flen, f, h) {
-	    var Q, Qnew, hh, bvirt;
-	    var enow = e[0];
-	    var fnow = f[0];
-	    var eindex = 0;
-	    var findex = 0;
-	    if ((fnow > enow) === (fnow > -enow)) {
-	        Q = enow;
-	        enow = e[++eindex];
-	    } else {
-	        Q = fnow;
-	        fnow = f[++findex];
-	    }
-	    var hindex = 0;
-	    if (eindex < elen && findex < flen) {
-	        if ((fnow > enow) === (fnow > -enow)) {
-	            Qnew = enow + Q;
-	            hh = Q - (Qnew - enow);
-	            enow = e[++eindex];
-	        } else {
-	            Qnew = fnow + Q;
-	            hh = Q - (Qnew - fnow);
-	            fnow = f[++findex];
-	        }
-	        Q = Qnew;
-	        if (hh !== 0) {
-	            h[hindex++] = hh;
-	        }
-	        while (eindex < elen && findex < flen) {
-	            if ((fnow > enow) === (fnow > -enow)) {
-	                Qnew = Q + enow;
-	                bvirt = Qnew - Q;
-	                hh = Q - (Qnew - bvirt) + (enow - bvirt);
-	                enow = e[++eindex];
-	            } else {
-	                Qnew = Q + fnow;
-	                bvirt = Qnew - Q;
-	                hh = Q - (Qnew - bvirt) + (fnow - bvirt);
-	                fnow = f[++findex];
-	            }
-	            Q = Qnew;
-	            if (hh !== 0) {
-	                h[hindex++] = hh;
-	            }
-	        }
-	    }
-	    while (eindex < elen) {
-	        Qnew = Q + enow;
-	        bvirt = Qnew - Q;
-	        hh = Q - (Qnew - bvirt) + (enow - bvirt);
-	        enow = e[++eindex];
-	        Q = Qnew;
-	        if (hh !== 0) {
-	            h[hindex++] = hh;
-	        }
-	    }
-	    while (findex < flen) {
-	        Qnew = Q + fnow;
-	        bvirt = Qnew - Q;
-	        hh = Q - (Qnew - bvirt) + (fnow - bvirt);
-	        fnow = f[++findex];
-	        Q = Qnew;
-	        if (hh !== 0) {
-	            h[hindex++] = hh;
-	        }
-	    }
-	    if (Q !== 0 || hindex === 0) {
-	        h[hindex++] = Q;
-	    }
-	    return hindex;
-	}
-
-	function estimate(elen, e) {
-	    var Q = e[0];
-	    for (var i = 1; i < elen; i++) { Q += e[i]; }
-	    return Q;
-	}
-
-	function vec(n) {
-	    return new Float64Array(n);
-	}
-
-	var ccwerrboundA = (3 + 16 * epsilon$1) * epsilon$1;
-	var ccwerrboundB = (2 + 12 * epsilon$1) * epsilon$1;
-	var ccwerrboundC = (9 + 64 * epsilon$1) * epsilon$1 * epsilon$1;
-
-	var B = vec(4);
-	var C1 = vec(8);
-	var C2 = vec(12);
-	var D = vec(16);
-	var u = vec(4);
-
-	function orient2dadapt(ax, ay, bx, by, cx, cy, detsum) {
-	    var acxtail, acytail, bcxtail, bcytail;
-	    var bvirt, c, ahi, alo, bhi, blo, _i, _j, _0, s1, s0, t1, t0, u3;
-
-	    var acx = ax - cx;
-	    var bcx = bx - cx;
-	    var acy = ay - cy;
-	    var bcy = by - cy;
-
-	    s1 = acx * bcy;
-	    c = splitter * acx;
-	    ahi = c - (c - acx);
-	    alo = acx - ahi;
-	    c = splitter * bcy;
-	    bhi = c - (c - bcy);
-	    blo = bcy - bhi;
-	    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-	    t1 = acy * bcx;
-	    c = splitter * acy;
-	    ahi = c - (c - acy);
-	    alo = acy - ahi;
-	    c = splitter * bcx;
-	    bhi = c - (c - bcx);
-	    blo = bcx - bhi;
-	    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-	    _i = s0 - t0;
-	    bvirt = s0 - _i;
-	    B[0] = s0 - (_i + bvirt) + (bvirt - t0);
-	    _j = s1 + _i;
-	    bvirt = _j - s1;
-	    _0 = s1 - (_j - bvirt) + (_i - bvirt);
-	    _i = _0 - t1;
-	    bvirt = _0 - _i;
-	    B[1] = _0 - (_i + bvirt) + (bvirt - t1);
-	    u3 = _j + _i;
-	    bvirt = u3 - _j;
-	    B[2] = _j - (u3 - bvirt) + (_i - bvirt);
-	    B[3] = u3;
-
-	    var det = estimate(4, B);
-	    var errbound = ccwerrboundB * detsum;
-	    if (det >= errbound || -det >= errbound) {
-	        return det;
-	    }
-
-	    bvirt = ax - acx;
-	    acxtail = ax - (acx + bvirt) + (bvirt - cx);
-	    bvirt = bx - bcx;
-	    bcxtail = bx - (bcx + bvirt) + (bvirt - cx);
-	    bvirt = ay - acy;
-	    acytail = ay - (acy + bvirt) + (bvirt - cy);
-	    bvirt = by - bcy;
-	    bcytail = by - (bcy + bvirt) + (bvirt - cy);
-
-	    if (acxtail === 0 && acytail === 0 && bcxtail === 0 && bcytail === 0) {
-	        return det;
-	    }
-
-	    errbound = ccwerrboundC * detsum + resulterrbound * Math.abs(det);
-	    det += (acx * bcytail + bcy * acxtail) - (acy * bcxtail + bcx * acytail);
-	    if (det >= errbound || -det >= errbound) { return det; }
-
-	    s1 = acxtail * bcy;
-	    c = splitter * acxtail;
-	    ahi = c - (c - acxtail);
-	    alo = acxtail - ahi;
-	    c = splitter * bcy;
-	    bhi = c - (c - bcy);
-	    blo = bcy - bhi;
-	    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-	    t1 = acytail * bcx;
-	    c = splitter * acytail;
-	    ahi = c - (c - acytail);
-	    alo = acytail - ahi;
-	    c = splitter * bcx;
-	    bhi = c - (c - bcx);
-	    blo = bcx - bhi;
-	    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-	    _i = s0 - t0;
-	    bvirt = s0 - _i;
-	    u[0] = s0 - (_i + bvirt) + (bvirt - t0);
-	    _j = s1 + _i;
-	    bvirt = _j - s1;
-	    _0 = s1 - (_j - bvirt) + (_i - bvirt);
-	    _i = _0 - t1;
-	    bvirt = _0 - _i;
-	    u[1] = _0 - (_i + bvirt) + (bvirt - t1);
-	    u3 = _j + _i;
-	    bvirt = u3 - _j;
-	    u[2] = _j - (u3 - bvirt) + (_i - bvirt);
-	    u[3] = u3;
-	    var C1len = sum$1(4, B, 4, u, C1);
-
-	    s1 = acx * bcytail;
-	    c = splitter * acx;
-	    ahi = c - (c - acx);
-	    alo = acx - ahi;
-	    c = splitter * bcytail;
-	    bhi = c - (c - bcytail);
-	    blo = bcytail - bhi;
-	    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-	    t1 = acy * bcxtail;
-	    c = splitter * acy;
-	    ahi = c - (c - acy);
-	    alo = acy - ahi;
-	    c = splitter * bcxtail;
-	    bhi = c - (c - bcxtail);
-	    blo = bcxtail - bhi;
-	    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-	    _i = s0 - t0;
-	    bvirt = s0 - _i;
-	    u[0] = s0 - (_i + bvirt) + (bvirt - t0);
-	    _j = s1 + _i;
-	    bvirt = _j - s1;
-	    _0 = s1 - (_j - bvirt) + (_i - bvirt);
-	    _i = _0 - t1;
-	    bvirt = _0 - _i;
-	    u[1] = _0 - (_i + bvirt) + (bvirt - t1);
-	    u3 = _j + _i;
-	    bvirt = u3 - _j;
-	    u[2] = _j - (u3 - bvirt) + (_i - bvirt);
-	    u[3] = u3;
-	    var C2len = sum$1(C1len, C1, 4, u, C2);
-
-	    s1 = acxtail * bcytail;
-	    c = splitter * acxtail;
-	    ahi = c - (c - acxtail);
-	    alo = acxtail - ahi;
-	    c = splitter * bcytail;
-	    bhi = c - (c - bcytail);
-	    blo = bcytail - bhi;
-	    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-	    t1 = acytail * bcxtail;
-	    c = splitter * acytail;
-	    ahi = c - (c - acytail);
-	    alo = acytail - ahi;
-	    c = splitter * bcxtail;
-	    bhi = c - (c - bcxtail);
-	    blo = bcxtail - bhi;
-	    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-	    _i = s0 - t0;
-	    bvirt = s0 - _i;
-	    u[0] = s0 - (_i + bvirt) + (bvirt - t0);
-	    _j = s1 + _i;
-	    bvirt = _j - s1;
-	    _0 = s1 - (_j - bvirt) + (_i - bvirt);
-	    _i = _0 - t1;
-	    bvirt = _0 - _i;
-	    u[1] = _0 - (_i + bvirt) + (bvirt - t1);
-	    u3 = _j + _i;
-	    bvirt = u3 - _j;
-	    u[2] = _j - (u3 - bvirt) + (_i - bvirt);
-	    u[3] = u3;
-	    var Dlen = sum$1(C2len, C2, 4, u, D);
-
-	    return D[Dlen - 1];
-	}
-
-	function orient2d(ax, ay, bx, by, cx, cy) {
-	    var detleft = (ay - cy) * (bx - cx);
-	    var detright = (ax - cx) * (by - cy);
-	    var det = detleft - detright;
-
-	    if (detleft === 0 || detright === 0 || (detleft > 0) !== (detright > 0)) { return det; }
-
-	    var detsum = Math.abs(detleft + detright);
-	    if (Math.abs(det) >= ccwerrboundA * detsum) { return det; }
-
-	    return -orient2dadapt(ax, ay, bx, by, cx, cy, detsum);
-	}
+	          if (interpolateValue) {
+	            source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
+	          }
 
-	/**
-	 * Signed area of the triangle (p0, p1, p2)
-	 * @param  {Array.<Number>} p0
-	 * @param  {Array.<Number>} p1
-	 * @param  {Array.<Number>} p2
-	 * @return {Number}
-	 */
-	function signedArea(p0, p1, p2) {
-	  var res = orient2d(p0[0], p0[1], p1[0], p1[1], p2[0], p2[1]);
-	  if (res > 0) { return -1; }
-	  if (res < 0) { return 1; }
-	  return 0;
-	}
+	          index = offset + match.length; // The JS engine embedded in Adobe products needs `match` returned in
+	          // order to produce the correct `offset` value.
 
-	/**
-	 * @param  {SweepEvent} e1
-	 * @param  {SweepEvent} e2
-	 * @return {Number}
-	 */
-	function compareEvents(e1, e2) {
-	  var p1 = e1.point;
-	  var p2 = e2.point;
+	          return match;
+	        });
+	        source += "';\n"; // If `variable` is not specified wrap a with-statement around the generated
+	        // code to add the data object to the top of the scope chain.
 
-	  // Different x-coordinate
-	  if (p1[0] > p2[0]) { return 1; }
-	  if (p1[0] < p2[0]) { return -1; }
+	        var variable = hasOwnProperty.call(options, 'variable') && options.variable;
 
-	  // Different points, but same x-coordinate
-	  // Event with lower y-coordinate is processed first
-	  if (p1[1] !== p2[1]) { return p1[1] > p2[1] ? 1 : -1; }
+	        if (!variable) {
+	          source = 'with (obj) {\n' + source + '\n}\n';
+	        } // Throw an error if a forbidden character was found in `variable`, to prevent
+	        // potential command injection attacks.
+	        else if (reForbiddenIdentifierChars.test(variable)) {
+	          throw new Error(INVALID_TEMPL_VAR_ERROR_TEXT);
+	        } // Cleanup code by stripping empty strings.
 
-	  return specialCases(e1, e2, p1);
-	}
 
+	        source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source).replace(reEmptyStringMiddle, '$1').replace(reEmptyStringTrailing, '$1;'); // Frame code as the function body.
 
-	/* eslint-disable no-unused-vars */
-	function specialCases(e1, e2, p1, p2) {
-	  // Same coordinates, but one is a left endpoint and the other is
-	  // a right endpoint. The right endpoint is processed first
-	  if (e1.left !== e2.left)
-	    { return e1.left ? 1 : -1; }
+	        source = 'function(' + (variable || 'obj') + ') {\n' + (variable ? '' : 'obj || (obj = {});\n') + "var __t, __p = ''" + (isEscaping ? ', __e = _.escape' : '') + (isEvaluating ? ', __j = Array.prototype.join;\n' + "function print() { __p += __j.call(arguments, '') }\n" : ';\n') + source + 'return __p\n}';
+	        var result = attempt(function () {
+	          return Function(importsKeys, sourceURL + 'return ' + source).apply(undefined$1, importsValues);
+	        }); // Provide the compiled function's source by its `toString` method or
+	        // the `source` property as a convenience for inlining compiled templates.
 
-	  // const p2 = e1.otherEvent.point, p3 = e2.otherEvent.point;
-	  // const sa = (p1[0] - p3[0]) * (p2[1] - p3[1]) - (p2[0] - p3[0]) * (p1[1] - p3[1])
-	  // Same coordinates, both events
-	  // are left endpoints or right endpoints.
-	  // not collinear
-	  if (signedArea(p1, e1.otherEvent.point, e2.otherEvent.point) !== 0) {
-	    // the event associate to the bottom segment is processed first
-	    return (!e1.isBelow(e2.otherEvent.point)) ? 1 : -1;
-	  }
+	        result.source = source;
 
-	  return (!e1.isSubject && e2.isSubject) ? 1 : -1;
-	}
-	/* eslint-enable no-unused-vars */
+	        if (isError(result)) {
+	          throw result;
+	        }
 
-	/**
-	 * @param  {SweepEvent} se
-	 * @param  {Array.<Number>} p
-	 * @param  {Queue} queue
-	 * @return {Queue}
-	 */
-	function divideSegment(se, p, queue)  {
-	  var r = new SweepEvent(p, false, se,            se.isSubject);
-	  var l = new SweepEvent(p, true,  se.otherEvent, se.isSubject);
+	        return result;
+	      }
+	      /**
+	       * Converts `string`, as a whole, to lower case just like
+	       * [String#toLowerCase](https://mdn.io/toLowerCase).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the lower cased string.
+	       * @example
+	       *
+	       * _.toLower('--Foo-Bar--');
+	       * // => '--foo-bar--'
+	       *
+	       * _.toLower('fooBar');
+	       * // => 'foobar'
+	       *
+	       * _.toLower('__FOO_BAR__');
+	       * // => '__foo_bar__'
+	       */
 
-	  /* eslint-disable no-console */
-	  if (equals(se.point, se.otherEvent.point)) {
-	    console.warn('what is that, a collapsed segment?', se);
-	  }
-	  /* eslint-enable no-console */
 
-	  r.contourId = l.contourId = se.contourId;
+	      function toLower(value) {
+	        return toString(value).toLowerCase();
+	      }
+	      /**
+	       * Converts `string`, as a whole, to upper case just like
+	       * [String#toUpperCase](https://mdn.io/toUpperCase).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the upper cased string.
+	       * @example
+	       *
+	       * _.toUpper('--foo-bar--');
+	       * // => '--FOO-BAR--'
+	       *
+	       * _.toUpper('fooBar');
+	       * // => 'FOOBAR'
+	       *
+	       * _.toUpper('__foo_bar__');
+	       * // => '__FOO_BAR__'
+	       */
 
-	  // avoid a rounding error. The left event would be processed after the right event
-	  if (compareEvents(l, se.otherEvent) > 0) {
-	    se.otherEvent.left = true;
-	    l.left = false;
-	  }
 
-	  // avoid a rounding error. The left event would be processed after the right event
-	  // if (compareEvents(se, r) > 0) {}
+	      function toUpper(value) {
+	        return toString(value).toUpperCase();
+	      }
+	      /**
+	       * Removes leading and trailing whitespace or specified characters from `string`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to trim.
+	       * @param {string} [chars=whitespace] The characters to trim.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {string} Returns the trimmed string.
+	       * @example
+	       *
+	       * _.trim('  abc  ');
+	       * // => 'abc'
+	       *
+	       * _.trim('-_-abc-_-', '_-');
+	       * // => 'abc'
+	       *
+	       * _.map(['  foo  ', '  bar  '], _.trim);
+	       * // => ['foo', 'bar']
+	       */
 
-	  se.otherEvent.otherEvent = l;
-	  se.otherEvent = r;
 
-	  queue.push(l);
-	  queue.push(r);
+	      function trim(string, chars, guard) {
+	        string = toString(string);
 
-	  return queue;
-	}
+	        if (string && (guard || chars === undefined$1)) {
+	          return baseTrim(string);
+	        }
 
-	//const EPS = 1e-9;
+	        if (!string || !(chars = baseToString(chars))) {
+	          return string;
+	        }
 
-	/**
-	 * Finds the magnitude of the cross product of two vectors (if we pretend
-	 * they're in three dimensions)
-	 *
-	 * @param {Object} a First vector
-	 * @param {Object} b Second vector
-	 * @private
-	 * @returns {Number} The magnitude of the cross product
-	 */
-	function crossProduct(a, b) {
-	  return (a[0] * b[1]) - (a[1] * b[0]);
-	}
+	        var strSymbols = stringToArray(string),
+	            chrSymbols = stringToArray(chars),
+	            start = charsStartIndex(strSymbols, chrSymbols),
+	            end = charsEndIndex(strSymbols, chrSymbols) + 1;
+	        return castSlice(strSymbols, start, end).join('');
+	      }
+	      /**
+	       * Removes trailing whitespace or specified characters from `string`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to trim.
+	       * @param {string} [chars=whitespace] The characters to trim.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {string} Returns the trimmed string.
+	       * @example
+	       *
+	       * _.trimEnd('  abc  ');
+	       * // => '  abc'
+	       *
+	       * _.trimEnd('-_-abc-_-', '_-');
+	       * // => '-_-abc'
+	       */
 
-	/**
-	 * Finds the dot product of two vectors.
-	 *
-	 * @param {Object} a First vector
-	 * @param {Object} b Second vector
-	 * @private
-	 * @returns {Number} The dot product
-	 */
-	function dotProduct(a, b) {
-	  return (a[0] * b[0]) + (a[1] * b[1]);
-	}
 
-	/**
-	 * Finds the intersection (if any) between two line segments a and b, given the
-	 * line segments' end points a1, a2 and b1, b2.
-	 *
-	 * This algorithm is based on Schneider and Eberly.
-	 * http://www.cimec.org.ar/~ncalvo/Schneider_Eberly.pdf
-	 * Page 244.
-	 *
-	 * @param {Array.<Number>} a1 point of first line
-	 * @param {Array.<Number>} a2 point of first line
-	 * @param {Array.<Number>} b1 point of second line
-	 * @param {Array.<Number>} b2 point of second line
-	 * @param {Boolean=}       noEndpointTouch whether to skip single touchpoints
-	 *                                         (meaning connected segments) as
-	 *                                         intersections
-	 * @returns {Array.<Array.<Number>>|Null} If the lines intersect, the point of
-	 * intersection. If they overlap, the two end points of the overlapping segment.
-	 * Otherwise, null.
-	 */
-	function intersection (a1, a2, b1, b2, noEndpointTouch) {
-	  // The algorithm expects our lines in the form P + sd, where P is a point,
-	  // s is on the interval [0, 1], and d is a vector.
-	  // We are passed two points. P can be the first point of each pair. The
-	  // vector, then, could be thought of as the distance (in x and y components)
-	  // from the first point to the second point.
-	  // So first, let's make our vectors:
-	  var va = [a2[0] - a1[0], a2[1] - a1[1]];
-	  var vb = [b2[0] - b1[0], b2[1] - b1[1]];
-	  // We also define a function to convert back to regular point form:
-
-	  /* eslint-disable arrow-body-style */
-
-	  function toPoint(p, s, d) {
-	    return [
-	      p[0] + s * d[0],
-	      p[1] + s * d[1]
-	    ];
-	  }
+	      function trimEnd(string, chars, guard) {
+	        string = toString(string);
 
-	  /* eslint-enable arrow-body-style */
-
-	  // The rest is pretty much a straight port of the algorithm.
-	  var e = [b1[0] - a1[0], b1[1] - a1[1]];
-	  var kross    = crossProduct(va, vb);
-	  var sqrKross = kross * kross;
-	  var sqrLenA  = dotProduct(va, va);
-	  //const sqrLenB  = dotProduct(vb, vb);
-
-	  // Check for line intersection. This works because of the properties of the
-	  // cross product -- specifically, two vectors are parallel if and only if the
-	  // cross product is the 0 vector. The full calculation involves relative error
-	  // to account for possible very small line segments. See Schneider & Eberly
-	  // for details.
-	  if (sqrKross > 0/* EPS * sqrLenB * sqLenA */) {
-	    // If they're not parallel, then (because these are line segments) they
-	    // still might not actually intersect. This code checks that the
-	    // intersection point of the lines is actually on both line segments.
-	    var s = crossProduct(e, vb) / kross;
-	    if (s < 0 || s > 1) {
-	      // not on line segment a
-	      return null;
-	    }
-	    var t = crossProduct(e, va) / kross;
-	    if (t < 0 || t > 1) {
-	      // not on line segment b
-	      return null;
-	    }
-	    if (s === 0 || s === 1) {
-	      // on an endpoint of line segment a
-	      return noEndpointTouch ? null : [toPoint(a1, s, va)];
-	    }
-	    if (t === 0 || t === 1) {
-	      // on an endpoint of line segment b
-	      return noEndpointTouch ? null : [toPoint(b1, t, vb)];
-	    }
-	    return [toPoint(a1, s, va)];
-	  }
+	        if (string && (guard || chars === undefined$1)) {
+	          return string.slice(0, trimmedEndIndex(string) + 1);
+	        }
+
+	        if (!string || !(chars = baseToString(chars))) {
+	          return string;
+	        }
+
+	        var strSymbols = stringToArray(string),
+	            end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;
+	        return castSlice(strSymbols, 0, end).join('');
+	      }
+	      /**
+	       * Removes leading whitespace or specified characters from `string`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to trim.
+	       * @param {string} [chars=whitespace] The characters to trim.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {string} Returns the trimmed string.
+	       * @example
+	       *
+	       * _.trimStart('  abc  ');
+	       * // => 'abc  '
+	       *
+	       * _.trimStart('-_-abc-_-', '_-');
+	       * // => 'abc-_-'
+	       */
 
-	  // If we've reached this point, then the lines are either parallel or the
-	  // same, but the segments could overlap partially or fully, or not at all.
-	  // So we need to find the overlap, if any. To do that, we can use e, which is
-	  // the (vector) difference between the two initial points. If this is parallel
-	  // with the line itself, then the two lines are the same line, and there will
-	  // be overlap.
-	  //const sqrLenE = dotProduct(e, e);
-	  kross = crossProduct(e, va);
-	  sqrKross = kross * kross;
 
-	  if (sqrKross > 0 /* EPS * sqLenB * sqLenE */) {
-	  // Lines are just parallel, not the same. No overlap.
-	    return null;
-	  }
+	      function trimStart(string, chars, guard) {
+	        string = toString(string);
 
-	  var sa = dotProduct(va, e) / sqrLenA;
-	  var sb = sa + dotProduct(va, vb) / sqrLenA;
-	  var smin = Math.min(sa, sb);
-	  var smax = Math.max(sa, sb);
+	        if (string && (guard || chars === undefined$1)) {
+	          return string.replace(reTrimStart, '');
+	        }
 
-	  // this is, essentially, the FindIntersection acting on floats from
-	  // Schneider & Eberly, just inlined into this function.
-	  if (smin <= 1 && smax >= 0) {
+	        if (!string || !(chars = baseToString(chars))) {
+	          return string;
+	        }
 
-	    // overlap on an end point
-	    if (smin === 1) {
-	      return noEndpointTouch ? null : [toPoint(a1, smin > 0 ? smin : 0, va)];
-	    }
+	        var strSymbols = stringToArray(string),
+	            start = charsStartIndex(strSymbols, stringToArray(chars));
+	        return castSlice(strSymbols, start).join('');
+	      }
+	      /**
+	       * Truncates `string` if it's longer than the given maximum string length.
+	       * The last characters of the truncated string are replaced with the omission
+	       * string which defaults to "...".
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to truncate.
+	       * @param {Object} [options={}] The options object.
+	       * @param {number} [options.length=30] The maximum string length.
+	       * @param {string} [options.omission='...'] The string to indicate text is omitted.
+	       * @param {RegExp|string} [options.separator] The separator pattern to truncate to.
+	       * @returns {string} Returns the truncated string.
+	       * @example
+	       *
+	       * _.truncate('hi-diddly-ho there, neighborino');
+	       * // => 'hi-diddly-ho there, neighbo...'
+	       *
+	       * _.truncate('hi-diddly-ho there, neighborino', {
+	       *   'length': 24,
+	       *   'separator': ' '
+	       * });
+	       * // => 'hi-diddly-ho there,...'
+	       *
+	       * _.truncate('hi-diddly-ho there, neighborino', {
+	       *   'length': 24,
+	       *   'separator': /,? +/
+	       * });
+	       * // => 'hi-diddly-ho there...'
+	       *
+	       * _.truncate('hi-diddly-ho there, neighborino', {
+	       *   'omission': ' [...]'
+	       * });
+	       * // => 'hi-diddly-ho there, neig [...]'
+	       */
 
-	    if (smax === 0) {
-	      return noEndpointTouch ? null : [toPoint(a1, smax < 1 ? smax : 1, va)];
-	    }
 
-	    if (noEndpointTouch && smin === 0 && smax === 1) { return null; }
+	      function truncate(string, options) {
+	        var length = DEFAULT_TRUNC_LENGTH,
+	            omission = DEFAULT_TRUNC_OMISSION;
 
-	    // There's overlap on a segment -- two points of intersection. Return both.
-	    return [
-	      toPoint(a1, smin > 0 ? smin : 0, va),
-	      toPoint(a1, smax < 1 ? smax : 1, va)
-	    ];
-	  }
+	        if (isObject(options)) {
+	          var separator = 'separator' in options ? options.separator : separator;
+	          length = 'length' in options ? toInteger(options.length) : length;
+	          omission = 'omission' in options ? baseToString(options.omission) : omission;
+	        }
 
-	  return null;
-	}
+	        string = toString(string);
+	        var strLength = string.length;
 
-	/**
-	 * @param  {SweepEvent} se1
-	 * @param  {SweepEvent} se2
-	 * @param  {Queue}      queue
-	 * @return {Number}
-	 */
-	function possibleIntersection (se1, se2, queue) {
-	  // that disallows self-intersecting polygons,
-	  // did cost us half a day, so I'll leave it
-	  // out of respect
-	  // if (se1.isSubject === se2.isSubject) return;
-	  var inter = intersection(
-	    se1.point, se1.otherEvent.point,
-	    se2.point, se2.otherEvent.point
-	  );
+	        if (hasUnicode(string)) {
+	          var strSymbols = stringToArray(string);
+	          strLength = strSymbols.length;
+	        }
 
-	  var nintersections = inter ? inter.length : 0;
-	  if (nintersections === 0) { return 0; } // no intersection
+	        if (length >= strLength) {
+	          return string;
+	        }
 
-	  // the line segments intersect at an endpoint of both line segments
-	  if ((nintersections === 1) &&
-	      (equals(se1.point, se2.point) ||
-	       equals(se1.otherEvent.point, se2.otherEvent.point))) {
-	    return 0;
-	  }
+	        var end = length - stringSize(omission);
 
-	  if (nintersections === 2 && se1.isSubject === se2.isSubject) {
-	    // if(se1.contourId === se2.contourId){
-	    // console.warn('Edges of the same polygon overlap',
-	    //   se1.point, se1.otherEvent.point, se2.point, se2.otherEvent.point);
-	    // }
-	    //throw new Error('Edges of the same polygon overlap');
-	    return 0;
-	  }
+	        if (end < 1) {
+	          return omission;
+	        }
 
-	  // The line segments associated to se1 and se2 intersect
-	  if (nintersections === 1) {
+	        var result = strSymbols ? castSlice(strSymbols, 0, end).join('') : string.slice(0, end);
 
-	    // if the intersection point is not an endpoint of se1
-	    if (!equals(se1.point, inter[0]) && !equals(se1.otherEvent.point, inter[0])) {
-	      divideSegment(se1, inter[0], queue);
-	    }
+	        if (separator === undefined$1) {
+	          return result + omission;
+	        }
 
-	    // if the intersection point is not an endpoint of se2
-	    if (!equals(se2.point, inter[0]) && !equals(se2.otherEvent.point, inter[0])) {
-	      divideSegment(se2, inter[0], queue);
-	    }
-	    return 1;
-	  }
+	        if (strSymbols) {
+	          end += result.length - end;
+	        }
 
-	  // The line segments associated to se1 and se2 overlap
-	  var events        = [];
-	  var leftCoincide  = false;
-	  var rightCoincide = false;
+	        if (isRegExp(separator)) {
+	          if (string.slice(end).search(separator)) {
+	            var match,
+	                substring = result;
 
-	  if (equals(se1.point, se2.point)) {
-	    leftCoincide = true; // linked
-	  } else if (compareEvents(se1, se2) === 1) {
-	    events.push(se2, se1);
-	  } else {
-	    events.push(se1, se2);
-	  }
+	            if (!separator.global) {
+	              separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
+	            }
 
-	  if (equals(se1.otherEvent.point, se2.otherEvent.point)) {
-	    rightCoincide = true;
-	  } else if (compareEvents(se1.otherEvent, se2.otherEvent) === 1) {
-	    events.push(se2.otherEvent, se1.otherEvent);
-	  } else {
-	    events.push(se1.otherEvent, se2.otherEvent);
-	  }
+	            separator.lastIndex = 0;
 
-	  if ((leftCoincide && rightCoincide) || leftCoincide) {
-	    // both line segments are equal or share the left endpoint
-	    se2.type = NON_CONTRIBUTING;
-	    se1.type = (se2.inOut === se1.inOut)
-	      ? SAME_TRANSITION : DIFFERENT_TRANSITION;
+	            while (match = separator.exec(substring)) {
+	              var newEnd = match.index;
+	            }
 
-	    if (leftCoincide && !rightCoincide) {
-	      // honestly no idea, but changing events selection from [2, 1]
-	      // to [0, 1] fixes the overlapping self-intersecting polygons issue
-	      divideSegment(events[1].otherEvent, events[0].point, queue);
-	    }
-	    return 2;
-	  }
+	            result = result.slice(0, newEnd === undefined$1 ? end : newEnd);
+	          }
+	        } else if (string.indexOf(baseToString(separator), end) != end) {
+	          var index = result.lastIndexOf(separator);
 
-	  // the line segments share the right endpoint
-	  if (rightCoincide) {
-	    divideSegment(events[0], events[1].point, queue);
-	    return 3;
-	  }
+	          if (index > -1) {
+	            result = result.slice(0, index);
+	          }
+	        }
 
-	  // no line segment includes totally the other one
-	  if (events[0] !== events[3].otherEvent) {
-	    divideSegment(events[0], events[1].point, queue);
-	    divideSegment(events[1], events[2].point, queue);
-	    return 3;
-	  }
+	        return result + omission;
+	      }
+	      /**
+	       * The inverse of `_.escape`; this method converts the HTML entities
+	       * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to
+	       * their corresponding characters.
+	       *
+	       * **Note:** No other HTML entities are unescaped. To unescape additional
+	       * HTML entities use a third-party library like [_he_](https://mths.be/he).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 0.6.0
+	       * @category String
+	       * @param {string} [string=''] The string to unescape.
+	       * @returns {string} Returns the unescaped string.
+	       * @example
+	       *
+	       * _.unescape('fred, barney, &amp; pebbles');
+	       * // => 'fred, barney, & pebbles'
+	       */
 
-	  // one line segment includes the other one
-	  divideSegment(events[0], events[1].point, queue);
-	  divideSegment(events[3].otherEvent, events[2].point, queue);
 
-	  return 3;
-	}
+	      function unescape(string) {
+	        string = toString(string);
+	        return string && reHasEscapedHtml.test(string) ? string.replace(reEscapedHtml, unescapeHtmlChar) : string;
+	      }
+	      /**
+	       * Converts `string`, as space separated words, to upper case.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the upper cased string.
+	       * @example
+	       *
+	       * _.upperCase('--foo-bar');
+	       * // => 'FOO BAR'
+	       *
+	       * _.upperCase('fooBar');
+	       * // => 'FOO BAR'
+	       *
+	       * _.upperCase('__foo_bar__');
+	       * // => 'FOO BAR'
+	       */
 
-	/**
-	 * @param  {SweepEvent} le1
-	 * @param  {SweepEvent} le2
-	 * @return {Number}
-	 */
-	function compareSegments(le1, le2) {
-	  if (le1 === le2) { return 0; }
 
-	  // Segments are not collinear
-	  if (signedArea(le1.point, le1.otherEvent.point, le2.point) !== 0 ||
-	    signedArea(le1.point, le1.otherEvent.point, le2.otherEvent.point) !== 0) {
+	      var upperCase = createCompounder(function (result, word, index) {
+	        return result + (index ? ' ' : '') + word.toUpperCase();
+	      });
+	      /**
+	       * Converts the first character of `string` to upper case.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to convert.
+	       * @returns {string} Returns the converted string.
+	       * @example
+	       *
+	       * _.upperFirst('fred');
+	       * // => 'Fred'
+	       *
+	       * _.upperFirst('FRED');
+	       * // => 'FRED'
+	       */
 
-	    // If they share their left endpoint use the right endpoint to sort
-	    if (equals(le1.point, le2.point)) { return le1.isBelow(le2.otherEvent.point) ? -1 : 1; }
+	      var upperFirst = createCaseFirst('toUpperCase');
+	      /**
+	       * Splits `string` into an array of its words.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category String
+	       * @param {string} [string=''] The string to inspect.
+	       * @param {RegExp|string} [pattern] The pattern to match words.
+	       * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+	       * @returns {Array} Returns the words of `string`.
+	       * @example
+	       *
+	       * _.words('fred, barney, & pebbles');
+	       * // => ['fred', 'barney', 'pebbles']
+	       *
+	       * _.words('fred, barney, & pebbles', /[^, ]+/g);
+	       * // => ['fred', 'barney', '&', 'pebbles']
+	       */
 
-	    // Different left endpoint: use the left endpoint to sort
-	    if (le1.point[0] === le2.point[0]) { return le1.point[1] < le2.point[1] ? -1 : 1; }
+	      function words(string, pattern, guard) {
+	        string = toString(string);
+	        pattern = guard ? undefined$1 : pattern;
 
-	    // has the line segment associated to e1 been inserted
-	    // into S after the line segment associated to e2 ?
-	    if (compareEvents(le1, le2) === 1) { return le2.isAbove(le1.point) ? -1 : 1; }
+	        if (pattern === undefined$1) {
+	          return hasUnicodeWord(string) ? unicodeWords(string) : asciiWords(string);
+	        }
 
-	    // The line segment associated to e2 has been inserted
-	    // into S after the line segment associated to e1
-	    return le1.isBelow(le2.point) ? -1 : 1;
-	  }
+	        return string.match(pattern) || [];
+	      }
+	      /*------------------------------------------------------------------------*/
 
-	  if (le1.isSubject === le2.isSubject) { // same polygon
-	    var p1 = le1.point, p2 = le2.point;
-	    if (p1[0] === p2[0] && p1[1] === p2[1]/*equals(le1.point, le2.point)*/) {
-	      p1 = le1.otherEvent.point; p2 = le2.otherEvent.point;
-	      if (p1[0] === p2[0] && p1[1] === p2[1]) { return 0; }
-	      else { return le1.contourId > le2.contourId ? 1 : -1; }
-	    }
-	  } else { // Segments are collinear, but belong to separate polygons
-	    return le1.isSubject ? -1 : 1;
-	  }
+	      /**
+	       * Attempts to invoke `func`, returning either the result or the caught error
+	       * object. Any additional arguments are provided to `func` when it's invoked.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Util
+	       * @param {Function} func The function to attempt.
+	       * @param {...*} [args] The arguments to invoke `func` with.
+	       * @returns {*} Returns the `func` result or error object.
+	       * @example
+	       *
+	       * // Avoid throwing errors for invalid selectors.
+	       * var elements = _.attempt(function(selector) {
+	       *   return document.querySelectorAll(selector);
+	       * }, '>_>');
+	       *
+	       * if (_.isError(elements)) {
+	       *   elements = [];
+	       * }
+	       */
 
-	  return compareEvents(le1, le2) === 1 ? 1 : -1;
-	}
 
-	function subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation) {
-	  var sweepLine = new SplayTree(compareSegments);
-	  var sortedEvents = [];
+	      var attempt = baseRest(function (func, args) {
+	        try {
+	          return apply(func, undefined$1, args);
+	        } catch (e) {
+	          return isError(e) ? e : new Error(e);
+	        }
+	      });
+	      /**
+	       * Binds methods of an object to the object itself, overwriting the existing
+	       * method.
+	       *
+	       * **Note:** This method doesn't set the "length" property of bound functions.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {Object} object The object to bind and assign the bound methods to.
+	       * @param {...(string|string[])} methodNames The object method names to bind.
+	       * @returns {Object} Returns `object`.
+	       * @example
+	       *
+	       * var view = {
+	       *   'label': 'docs',
+	       *   'click': function() {
+	       *     console.log('clicked ' + this.label);
+	       *   }
+	       * };
+	       *
+	       * _.bindAll(view, ['click']);
+	       * jQuery(element).on('click', view.click);
+	       * // => Logs 'clicked docs' when clicked.
+	       */
+
+	      var bindAll = flatRest(function (object, methodNames) {
+	        arrayEach(methodNames, function (key) {
+	          key = toKey(key);
+	          baseAssignValue(object, key, bind(object[key], object));
+	        });
+	        return object;
+	      });
+	      /**
+	       * Creates a function that iterates over `pairs` and invokes the corresponding
+	       * function of the first predicate to return truthy. The predicate-function
+	       * pairs are invoked with the `this` binding and arguments of the created
+	       * function.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {Array} pairs The predicate-function pairs.
+	       * @returns {Function} Returns the new composite function.
+	       * @example
+	       *
+	       * var func = _.cond([
+	       *   [_.matches({ 'a': 1 }),           _.constant('matches A')],
+	       *   [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
+	       *   [_.stubTrue,                      _.constant('no match')]
+	       * ]);
+	       *
+	       * func({ 'a': 1, 'b': 2 });
+	       * // => 'matches A'
+	       *
+	       * func({ 'a': 0, 'b': 1 });
+	       * // => 'matches B'
+	       *
+	       * func({ 'a': '1', 'b': '2' });
+	       * // => 'no match'
+	       */
 
-	  var rightbound = Math.min(sbbox[2], cbbox[2]);
+	      function cond(pairs) {
+	        var length = pairs == null ? 0 : pairs.length,
+	            toIteratee = getIteratee();
+	        pairs = !length ? [] : arrayMap(pairs, function (pair) {
+	          if (typeof pair[1] != 'function') {
+	            throw new TypeError(FUNC_ERROR_TEXT);
+	          }
 
-	  var prev, next, begin;
+	          return [toIteratee(pair[0]), pair[1]];
+	        });
+	        return baseRest(function (args) {
+	          var index = -1;
 
-	  while (eventQueue.length !== 0) {
-	    var event = eventQueue.pop();
-	    sortedEvents.push(event);
+	          while (++index < length) {
+	            var pair = pairs[index];
 
-	    // optimization by bboxes for intersection and difference goes here
-	    if ((operation === INTERSECTION && event.point[0] > rightbound) ||
-	        (operation === DIFFERENCE   && event.point[0] > sbbox[2])) {
-	      break;
-	    }
+	            if (apply(pair[0], this, args)) {
+	              return apply(pair[1], this, args);
+	            }
+	          }
+	        });
+	      }
+	      /**
+	       * Creates a function that invokes the predicate properties of `source` with
+	       * the corresponding property values of a given object, returning `true` if
+	       * all predicates return truthy, else `false`.
+	       *
+	       * **Note:** The created function is equivalent to `_.conformsTo` with
+	       * `source` partially applied.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {Object} source The object of property predicates to conform to.
+	       * @returns {Function} Returns the new spec function.
+	       * @example
+	       *
+	       * var objects = [
+	       *   { 'a': 2, 'b': 1 },
+	       *   { 'a': 1, 'b': 2 }
+	       * ];
+	       *
+	       * _.filter(objects, _.conforms({ 'b': function(n) { return n > 1; } }));
+	       * // => [{ 'a': 1, 'b': 2 }]
+	       */
 
-	    if (event.left) {
-	      next  = prev = sweepLine.insert(event);
-	      begin = sweepLine.minNode();
 
-	      if (prev !== begin) { prev = sweepLine.prev(prev); }
-	      else                { prev = null; }
+	      function conforms(source) {
+	        return baseConforms(baseClone(source, CLONE_DEEP_FLAG));
+	      }
+	      /**
+	       * Creates a function that returns `value`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.4.0
+	       * @category Util
+	       * @param {*} value The value to return from the new function.
+	       * @returns {Function} Returns the new constant function.
+	       * @example
+	       *
+	       * var objects = _.times(2, _.constant({ 'a': 1 }));
+	       *
+	       * console.log(objects);
+	       * // => [{ 'a': 1 }, { 'a': 1 }]
+	       *
+	       * console.log(objects[0] === objects[1]);
+	       * // => true
+	       */
 
-	      next = sweepLine.next(next);
 
-	      var prevEvent = prev ? prev.key : null;
-	      var prevprevEvent = (void 0);
-	      computeFields(event, prevEvent, operation);
-	      if (next) {
-	        if (possibleIntersection(event, next.key, eventQueue) === 2) {
-	          computeFields(event, prevEvent, operation);
-	          computeFields(event, next.key, operation);
-	        }
+	      function constant(value) {
+	        return function () {
+	          return value;
+	        };
 	      }
+	      /**
+	       * Checks `value` to determine whether a default value should be returned in
+	       * its place. The `defaultValue` is returned if `value` is `NaN`, `null`,
+	       * or `undefined`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.14.0
+	       * @category Util
+	       * @param {*} value The value to check.
+	       * @param {*} defaultValue The default value.
+	       * @returns {*} Returns the resolved value.
+	       * @example
+	       *
+	       * _.defaultTo(1, 10);
+	       * // => 1
+	       *
+	       * _.defaultTo(undefined, 10);
+	       * // => 10
+	       */
 
-	      if (prev) {
-	        if (possibleIntersection(prev.key, event, eventQueue) === 2) {
-	          var prevprev = prev;
-	          if (prevprev !== begin) { prevprev = sweepLine.prev(prevprev); }
-	          else                    { prevprev = null; }
 
-	          prevprevEvent = prevprev ? prevprev.key : null;
-	          computeFields(prevEvent, prevprevEvent, operation);
-	          computeFields(event,     prevEvent,     operation);
-	        }
+	      function defaultTo(value, defaultValue) {
+	        return value == null || value !== value ? defaultValue : value;
 	      }
-	    } else {
-	      event = event.otherEvent;
-	      next = prev = sweepLine.find(event);
+	      /**
+	       * Creates a function that returns the result of invoking the given functions
+	       * with the `this` binding of the created function, where each successive
+	       * invocation is supplied the return value of the previous.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Util
+	       * @param {...(Function|Function[])} [funcs] The functions to invoke.
+	       * @returns {Function} Returns the new composite function.
+	       * @see _.flowRight
+	       * @example
+	       *
+	       * function square(n) {
+	       *   return n * n;
+	       * }
+	       *
+	       * var addSquare = _.flow([_.add, square]);
+	       * addSquare(1, 2);
+	       * // => 9
+	       */
 
-	      if (prev && next) {
 
-	        if (prev !== begin) { prev = sweepLine.prev(prev); }
-	        else                { prev = null; }
+	      var flow = createFlow();
+	      /**
+	       * This method is like `_.flow` except that it creates a function that
+	       * invokes the given functions from right to left.
+	       *
+	       * @static
+	       * @since 3.0.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {...(Function|Function[])} [funcs] The functions to invoke.
+	       * @returns {Function} Returns the new composite function.
+	       * @see _.flow
+	       * @example
+	       *
+	       * function square(n) {
+	       *   return n * n;
+	       * }
+	       *
+	       * var addSquare = _.flowRight([square, _.add]);
+	       * addSquare(1, 2);
+	       * // => 9
+	       */
 
-	        next = sweepLine.next(next);
-	        sweepLine.remove(event);
+	      var flowRight = createFlow(true);
+	      /**
+	       * This method returns the first argument it receives.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {*} value Any value.
+	       * @returns {*} Returns `value`.
+	       * @example
+	       *
+	       * var object = { 'a': 1 };
+	       *
+	       * console.log(_.identity(object) === object);
+	       * // => true
+	       */
 
-	        if (next && prev) {
-	          possibleIntersection(prev.key, next.key, eventQueue);
-	        }
+	      function identity(value) {
+	        return value;
 	      }
-	    }
-	  }
-	  return sortedEvents;
-	}
+	      /**
+	       * Creates a function that invokes `func` with the arguments of the created
+	       * function. If `func` is a property name, the created function returns the
+	       * property value for a given element. If `func` is an array or object, the
+	       * created function returns `true` for elements that contain the equivalent
+	       * source properties, otherwise it returns `false`.
+	       *
+	       * @static
+	       * @since 4.0.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {*} [func=_.identity] The value to convert to a callback.
+	       * @returns {Function} Returns the callback.
+	       * @example
+	       *
+	       * var users = [
+	       *   { 'user': 'barney', 'age': 36, 'active': true },
+	       *   { 'user': 'fred',   'age': 40, 'active': false }
+	       * ];
+	       *
+	       * // The `_.matches` iteratee shorthand.
+	       * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
+	       * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
+	       *
+	       * // The `_.matchesProperty` iteratee shorthand.
+	       * _.filter(users, _.iteratee(['user', 'fred']));
+	       * // => [{ 'user': 'fred', 'age': 40 }]
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.map(users, _.iteratee('user'));
+	       * // => ['barney', 'fred']
+	       *
+	       * // Create custom iteratee shorthands.
+	       * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
+	       *   return !_.isRegExp(func) ? iteratee(func) : function(string) {
+	       *     return func.test(string);
+	       *   };
+	       * });
+	       *
+	       * _.filter(['abc', 'def'], /ef/);
+	       * // => ['def']
+	       */
 
-	var Contour = function Contour() {
-	  this.points = [];
-	  this.holeIds = [];
-	  this.holeOf = null;
-	  this.depth = null;
-	};
 
-	Contour.prototype.isExterior = function isExterior () {
-	  return this.holeOf == null;
-	};
+	      function iteratee(func) {
+	        return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));
+	      }
+	      /**
+	       * Creates a function that performs a partial deep comparison between a given
+	       * object and `source`, returning `true` if the given object has equivalent
+	       * property values, else `false`.
+	       *
+	       * **Note:** The created function is equivalent to `_.isMatch` with `source`
+	       * partially applied.
+	       *
+	       * Partial comparisons will match empty array and empty object `source`
+	       * values against any array or object value, respectively. See `_.isEqual`
+	       * for a list of supported value comparisons.
+	       *
+	       * **Note:** Multiple values can be checked by combining several matchers
+	       * using `_.overSome`
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Util
+	       * @param {Object} source The object of property values to match.
+	       * @returns {Function} Returns the new spec function.
+	       * @example
+	       *
+	       * var objects = [
+	       *   { 'a': 1, 'b': 2, 'c': 3 },
+	       *   { 'a': 4, 'b': 5, 'c': 6 }
+	       * ];
+	       *
+	       * _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));
+	       * // => [{ 'a': 4, 'b': 5, 'c': 6 }]
+	       *
+	       * // Checking for several possible values
+	       * _.filter(objects, _.overSome([_.matches({ 'a': 1 }), _.matches({ 'a': 4 })]));
+	       * // => [{ 'a': 1, 'b': 2, 'c': 3 }, { 'a': 4, 'b': 5, 'c': 6 }]
+	       */
 
-	/**
-	 * @param  {Array.<SweepEvent>} sortedEvents
-	 * @return {Array.<SweepEvent>}
-	 */
-	function orderEvents(sortedEvents) {
-	  var event, i, len, tmp;
-	  var resultEvents = [];
-	  for (i = 0, len = sortedEvents.length; i < len; i++) {
-	    event = sortedEvents[i];
-	    if ((event.left && event.inResult) ||
-	      (!event.left && event.otherEvent.inResult)) {
-	      resultEvents.push(event);
-	    }
-	  }
-	  // Due to overlapping edges the resultEvents array can be not wholly sorted
-	  var sorted = false;
-	  while (!sorted) {
-	    sorted = true;
-	    for (i = 0, len = resultEvents.length; i < len; i++) {
-	      if ((i + 1) < len &&
-	        compareEvents(resultEvents[i], resultEvents[i + 1]) === 1) {
-	        tmp = resultEvents[i];
-	        resultEvents[i] = resultEvents[i + 1];
-	        resultEvents[i + 1] = tmp;
-	        sorted = false;
+
+	      function matches(source) {
+	        return baseMatches(baseClone(source, CLONE_DEEP_FLAG));
 	      }
-	    }
-	  }
+	      /**
+	       * Creates a function that performs a partial deep comparison between the
+	       * value at `path` of a given object to `srcValue`, returning `true` if the
+	       * object value is equivalent, else `false`.
+	       *
+	       * **Note:** Partial comparisons will match empty array and empty object
+	       * `srcValue` values against any array or object value, respectively. See
+	       * `_.isEqual` for a list of supported value comparisons.
+	       *
+	       * **Note:** Multiple values can be checked by combining several matchers
+	       * using `_.overSome`
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.2.0
+	       * @category Util
+	       * @param {Array|string} path The path of the property to get.
+	       * @param {*} srcValue The value to match.
+	       * @returns {Function} Returns the new spec function.
+	       * @example
+	       *
+	       * var objects = [
+	       *   { 'a': 1, 'b': 2, 'c': 3 },
+	       *   { 'a': 4, 'b': 5, 'c': 6 }
+	       * ];
+	       *
+	       * _.find(objects, _.matchesProperty('a', 4));
+	       * // => { 'a': 4, 'b': 5, 'c': 6 }
+	       *
+	       * // Checking for several possible values
+	       * _.filter(objects, _.overSome([_.matchesProperty('a', 1), _.matchesProperty('a', 4)]));
+	       * // => [{ 'a': 1, 'b': 2, 'c': 3 }, { 'a': 4, 'b': 5, 'c': 6 }]
+	       */
 
 
-	  for (i = 0, len = resultEvents.length; i < len; i++) {
-	    event = resultEvents[i];
-	    event.otherPos = i;
-	  }
+	      function matchesProperty(path, srcValue) {
+	        return baseMatchesProperty(path, baseClone(srcValue, CLONE_DEEP_FLAG));
+	      }
+	      /**
+	       * Creates a function that invokes the method at `path` of a given object.
+	       * Any additional arguments are provided to the invoked method.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.7.0
+	       * @category Util
+	       * @param {Array|string} path The path of the method to invoke.
+	       * @param {...*} [args] The arguments to invoke the method with.
+	       * @returns {Function} Returns the new invoker function.
+	       * @example
+	       *
+	       * var objects = [
+	       *   { 'a': { 'b': _.constant(2) } },
+	       *   { 'a': { 'b': _.constant(1) } }
+	       * ];
+	       *
+	       * _.map(objects, _.method('a.b'));
+	       * // => [2, 1]
+	       *
+	       * _.map(objects, _.method(['a', 'b']));
+	       * // => [2, 1]
+	       */
 
-	  // imagine, the right event is found in the beginning of the queue,
-	  // when his left counterpart is not marked yet
-	  for (i = 0, len = resultEvents.length; i < len; i++) {
-	    event = resultEvents[i];
-	    if (!event.left) {
-	      tmp = event.otherPos;
-	      event.otherPos = event.otherEvent.otherPos;
-	      event.otherEvent.otherPos = tmp;
-	    }
-	  }
 
-	  return resultEvents;
-	}
+	      var method = baseRest(function (path, args) {
+	        return function (object) {
+	          return baseInvoke(object, path, args);
+	        };
+	      });
+	      /**
+	       * The opposite of `_.method`; this method creates a function that invokes
+	       * the method at a given path of `object`. Any additional arguments are
+	       * provided to the invoked method.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.7.0
+	       * @category Util
+	       * @param {Object} object The object to query.
+	       * @param {...*} [args] The arguments to invoke the method with.
+	       * @returns {Function} Returns the new invoker function.
+	       * @example
+	       *
+	       * var array = _.times(3, _.constant),
+	       *     object = { 'a': array, 'b': array, 'c': array };
+	       *
+	       * _.map(['a[2]', 'c[0]'], _.methodOf(object));
+	       * // => [2, 0]
+	       *
+	       * _.map([['a', '2'], ['c', '0']], _.methodOf(object));
+	       * // => [2, 0]
+	       */
 
+	      var methodOf = baseRest(function (object, args) {
+	        return function (path) {
+	          return baseInvoke(object, path, args);
+	        };
+	      });
+	      /**
+	       * Adds all own enumerable string keyed function properties of a source
+	       * object to the destination object. If `object` is a function, then methods
+	       * are added to its prototype as well.
+	       *
+	       * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
+	       * avoid conflicts caused by modifying the original.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {Function|Object} [object=lodash] The destination object.
+	       * @param {Object} source The object of functions to add.
+	       * @param {Object} [options={}] The options object.
+	       * @param {boolean} [options.chain=true] Specify whether mixins are chainable.
+	       * @returns {Function|Object} Returns `object`.
+	       * @example
+	       *
+	       * function vowels(string) {
+	       *   return _.filter(string, function(v) {
+	       *     return /[aeiou]/i.test(v);
+	       *   });
+	       * }
+	       *
+	       * _.mixin({ 'vowels': vowels });
+	       * _.vowels('fred');
+	       * // => ['e']
+	       *
+	       * _('fred').vowels().value();
+	       * // => ['e']
+	       *
+	       * _.mixin({ 'vowels': vowels }, { 'chain': false });
+	       * _('fred').vowels();
+	       * // => ['e']
+	       */
 
-	/**
-	 * @param  {Number} pos
-	 * @param  {Array.<SweepEvent>} resultEvents
-	 * @param  {Object>}    processed
-	 * @return {Number}
-	 */
-	function nextPos(pos, resultEvents, processed, origPos) {
-	  var newPos = pos + 1,
-	      p = resultEvents[pos].point,
-	      p1;
-	  var length = resultEvents.length;
-
-	  if (newPos < length)
-	    { p1 = resultEvents[newPos].point; }
-
-	  while (newPos < length && p1[0] === p[0] && p1[1] === p[1]) {
-	    if (!processed[newPos]) {
-	      return newPos;
-	    } else   {
-	      newPos++;
-	    }
-	    p1 = resultEvents[newPos].point;
-	  }
-
-	  newPos = pos - 1;
-
-	  while (processed[newPos] && newPos > origPos) {
-	    newPos--;
-	  }
-
-	  return newPos;
-	}
-
-
-	function initializeContourFromContext(event, contours, contourId) {
-	  var contour = new Contour();
-	  if (event.prevInResult != null) {
-	    var prevInResult = event.prevInResult;
-	    // Note that it is valid to query the "previous in result" for its output contour id,
-	    // because we must have already processed it (i.e., assigned an output contour id)
-	    // in an earlier iteration, otherwise it wouldn't be possible that it is "previous in
-	    // result".
-	    var lowerContourId = prevInResult.outputContourId;
-	    var lowerResultTransition = prevInResult.resultTransition;
-	    if (lowerResultTransition > 0) {
-	      // We are inside. Now we have to check if the thing below us is another hole or
-	      // an exterior contour.
-	      var lowerContour = contours[lowerContourId];
-	      if (lowerContour.holeOf != null) {
-	        // The lower contour is a hole => Connect the new contour as a hole to its parent,
-	        // and use same depth.
-	        var parentContourId = lowerContour.holeOf;
-	        contours[parentContourId].holeIds.push(contourId);
-	        contour.holeOf = parentContourId;
-	        contour.depth = contours[lowerContourId].depth;
-	      } else {
-	        // The lower contour is an exterior contour => Connect the new contour as a hole,
-	        // and increment depth.
-	        contours[lowerContourId].holeIds.push(contourId);
-	        contour.holeOf = lowerContourId;
-	        contour.depth = contours[lowerContourId].depth + 1;
-	      }
-	    } else {
-	      // We are outside => this contour is an exterior contour of same depth.
-	      contour.holeOf = null;
-	      contour.depth = contours[lowerContourId].depth;
-	    }
-	  } else {
-	    // There is no lower/previous contour => this contour is an exterior contour of depth 0.
-	    contour.holeOf = null;
-	    contour.depth = 0;
-	  }
-	  return contour;
-	}
+	      function mixin(object, source, options) {
+	        var props = keys(source),
+	            methodNames = baseFunctions(source, props);
+
+	        if (options == null && !(isObject(source) && (methodNames.length || !props.length))) {
+	          options = source;
+	          source = object;
+	          object = this;
+	          methodNames = baseFunctions(source, keys(source));
+	        }
+
+	        var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
+	            isFunc = isFunction(object);
+	        arrayEach(methodNames, function (methodName) {
+	          var func = source[methodName];
+	          object[methodName] = func;
+
+	          if (isFunc) {
+	            object.prototype[methodName] = function () {
+	              var chainAll = this.__chain__;
+
+	              if (chain || chainAll) {
+	                var result = object(this.__wrapped__),
+	                    actions = result.__actions__ = copyArray(this.__actions__);
+	                actions.push({
+	                  'func': func,
+	                  'args': arguments,
+	                  'thisArg': object
+	                });
+	                result.__chain__ = chainAll;
+	                return result;
+	              }
 
-	/**
-	 * @param  {Array.<SweepEvent>} sortedEvents
-	 * @return {Array.<*>} polygons
-	 */
-	function connectEdges(sortedEvents) {
-	  var i, len;
-	  var resultEvents = orderEvents(sortedEvents);
+	              return func.apply(object, arrayPush([this.value()], arguments));
+	            };
+	          }
+	        });
+	        return object;
+	      }
+	      /**
+	       * Reverts the `_` variable to its previous value and returns a reference to
+	       * the `lodash` function.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Util
+	       * @returns {Function} Returns the `lodash` function.
+	       * @example
+	       *
+	       * var lodash = _.noConflict();
+	       */
 
-	  // "false"-filled array
-	  var processed = {};
-	  var contours = [];
 
-	  var loop = function (  ) {
+	      function noConflict() {
+	        if (root._ === this) {
+	          root._ = oldDash;
+	        }
 
-	    if (processed[i]) {
-	      return;
-	    }
+	        return this;
+	      }
+	      /**
+	       * This method returns `undefined`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.3.0
+	       * @category Util
+	       * @example
+	       *
+	       * _.times(2, _.noop);
+	       * // => [undefined, undefined]
+	       */
 
-	    var contourId = contours.length;
-	    var contour = initializeContourFromContext(resultEvents[i], contours, contourId);
 
-	    // Helper function that combines marking an event as processed with assigning its output contour ID
-	    var markAsProcessed = function (pos) {
-	      processed[pos] = true;
-	      resultEvents[pos].outputContourId = contourId;
-	    };
+	      function noop() {// No operation performed.
+	      }
+	      /**
+	       * Creates a function that gets the argument at index `n`. If `n` is negative,
+	       * the nth argument from the end is returned.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {number} [n=0] The index of the argument to return.
+	       * @returns {Function} Returns the new pass-thru function.
+	       * @example
+	       *
+	       * var func = _.nthArg(1);
+	       * func('a', 'b', 'c', 'd');
+	       * // => 'b'
+	       *
+	       * var func = _.nthArg(-2);
+	       * func('a', 'b', 'c', 'd');
+	       * // => 'c'
+	       */
 
-	    var pos = i;
-	    var origPos = i;
 
-	    var initial = resultEvents[i].point;
-	    contour.points.push(initial);
+	      function nthArg(n) {
+	        n = toInteger(n);
+	        return baseRest(function (args) {
+	          return baseNth(args, n);
+	        });
+	      }
+	      /**
+	       * Creates a function that invokes `iteratees` with the arguments it receives
+	       * and returns their results.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {...(Function|Function[])} [iteratees=[_.identity]]
+	       *  The iteratees to invoke.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * var func = _.over([Math.max, Math.min]);
+	       *
+	       * func(1, 2, 3, 4);
+	       * // => [4, 1]
+	       */
 
-	    /* eslint no-constant-condition: "off" */
-	    while (true) {
-	      markAsProcessed(pos);
 
-	      pos = resultEvents[pos].otherPos;
+	      var over = createOver(arrayMap);
+	      /**
+	       * Creates a function that checks if **all** of the `predicates` return
+	       * truthy when invoked with the arguments it receives.
+	       *
+	       * Following shorthands are possible for providing predicates.
+	       * Pass an `Object` and it will be used as an parameter for `_.matches` to create the predicate.
+	       * Pass an `Array` of parameters for `_.matchesProperty` and the predicate will be created using them.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {...(Function|Function[])} [predicates=[_.identity]]
+	       *  The predicates to check.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * var func = _.overEvery([Boolean, isFinite]);
+	       *
+	       * func('1');
+	       * // => true
+	       *
+	       * func(null);
+	       * // => false
+	       *
+	       * func(NaN);
+	       * // => false
+	       */
 
-	      markAsProcessed(pos);
-	      contour.points.push(resultEvents[pos].point);
+	      var overEvery = createOver(arrayEvery);
+	      /**
+	       * Creates a function that checks if **any** of the `predicates` return
+	       * truthy when invoked with the arguments it receives.
+	       *
+	       * Following shorthands are possible for providing predicates.
+	       * Pass an `Object` and it will be used as an parameter for `_.matches` to create the predicate.
+	       * Pass an `Array` of parameters for `_.matchesProperty` and the predicate will be created using them.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {...(Function|Function[])} [predicates=[_.identity]]
+	       *  The predicates to check.
+	       * @returns {Function} Returns the new function.
+	       * @example
+	       *
+	       * var func = _.overSome([Boolean, isFinite]);
+	       *
+	       * func('1');
+	       * // => true
+	       *
+	       * func(null);
+	       * // => true
+	       *
+	       * func(NaN);
+	       * // => false
+	       *
+	       * var matchesFunc = _.overSome([{ 'a': 1 }, { 'a': 2 }])
+	       * var matchesPropertyFunc = _.overSome([['a', 1], ['a', 2]])
+	       */
 
-	      pos = nextPos(pos, resultEvents, processed, origPos);
+	      var overSome = createOver(arraySome);
+	      /**
+	       * Creates a function that returns the value at `path` of a given object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 2.4.0
+	       * @category Util
+	       * @param {Array|string} path The path of the property to get.
+	       * @returns {Function} Returns the new accessor function.
+	       * @example
+	       *
+	       * var objects = [
+	       *   { 'a': { 'b': 2 } },
+	       *   { 'a': { 'b': 1 } }
+	       * ];
+	       *
+	       * _.map(objects, _.property('a.b'));
+	       * // => [2, 1]
+	       *
+	       * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+	       * // => [1, 2]
+	       */
 
-	      if (pos == origPos) {
-	        break;
+	      function property(path) {
+	        return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
 	      }
-	    }
+	      /**
+	       * The opposite of `_.property`; this method creates a function that returns
+	       * the value at a given path of `object`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.0.0
+	       * @category Util
+	       * @param {Object} object The object to query.
+	       * @returns {Function} Returns the new accessor function.
+	       * @example
+	       *
+	       * var array = [0, 1, 2],
+	       *     object = { 'a': array, 'b': array, 'c': array };
+	       *
+	       * _.map(['a[2]', 'c[0]'], _.propertyOf(object));
+	       * // => [2, 0]
+	       *
+	       * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
+	       * // => [2, 0]
+	       */
 
-	    contours.push(contour);
-	  };
 
-	  for (i = 0, len = resultEvents.length; i < len; i++) loop(  );
+	      function propertyOf(object) {
+	        return function (path) {
+	          return object == null ? undefined$1 : baseGet(object, path);
+	        };
+	      }
+	      /**
+	       * Creates an array of numbers (positive and/or negative) progressing from
+	       * `start` up to, but not including, `end`. A step of `-1` is used if a negative
+	       * `start` is specified without an `end` or `step`. If `end` is not specified,
+	       * it's set to `start` with `start` then set to `0`.
+	       *
+	       * **Note:** JavaScript follows the IEEE-754 standard for resolving
+	       * floating-point values which can produce unexpected results.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {number} [start=0] The start of the range.
+	       * @param {number} end The end of the range.
+	       * @param {number} [step=1] The value to increment or decrement by.
+	       * @returns {Array} Returns the range of numbers.
+	       * @see _.inRange, _.rangeRight
+	       * @example
+	       *
+	       * _.range(4);
+	       * // => [0, 1, 2, 3]
+	       *
+	       * _.range(-4);
+	       * // => [0, -1, -2, -3]
+	       *
+	       * _.range(1, 5);
+	       * // => [1, 2, 3, 4]
+	       *
+	       * _.range(0, 20, 5);
+	       * // => [0, 5, 10, 15]
+	       *
+	       * _.range(0, -4, -1);
+	       * // => [0, -1, -2, -3]
+	       *
+	       * _.range(1, 4, 0);
+	       * // => [1, 1, 1]
+	       *
+	       * _.range(0);
+	       * // => []
+	       */
 
-	  return contours;
-	}
 
-	var tinyqueue = TinyQueue;
-	var _default$1 = TinyQueue;
+	      var range = createRange();
+	      /**
+	       * This method is like `_.range` except that it populates values in
+	       * descending order.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {number} [start=0] The start of the range.
+	       * @param {number} end The end of the range.
+	       * @param {number} [step=1] The value to increment or decrement by.
+	       * @returns {Array} Returns the range of numbers.
+	       * @see _.inRange, _.range
+	       * @example
+	       *
+	       * _.rangeRight(4);
+	       * // => [3, 2, 1, 0]
+	       *
+	       * _.rangeRight(-4);
+	       * // => [-3, -2, -1, 0]
+	       *
+	       * _.rangeRight(1, 5);
+	       * // => [4, 3, 2, 1]
+	       *
+	       * _.rangeRight(0, 20, 5);
+	       * // => [15, 10, 5, 0]
+	       *
+	       * _.rangeRight(0, -4, -1);
+	       * // => [-3, -2, -1, 0]
+	       *
+	       * _.rangeRight(1, 4, 0);
+	       * // => [1, 1, 1]
+	       *
+	       * _.rangeRight(0);
+	       * // => []
+	       */
 
-	function TinyQueue(data, compare) {
-	    if (!(this instanceof TinyQueue)) { return new TinyQueue(data, compare); }
+	      var rangeRight = createRange(true);
+	      /**
+	       * This method returns a new empty array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.13.0
+	       * @category Util
+	       * @returns {Array} Returns the new empty array.
+	       * @example
+	       *
+	       * var arrays = _.times(2, _.stubArray);
+	       *
+	       * console.log(arrays);
+	       * // => [[], []]
+	       *
+	       * console.log(arrays[0] === arrays[1]);
+	       * // => false
+	       */
 
-	    this.data = data || [];
-	    this.length = this.data.length;
-	    this.compare = compare || defaultCompare$1;
+	      function stubArray() {
+	        return [];
+	      }
+	      /**
+	       * This method returns `false`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.13.0
+	       * @category Util
+	       * @returns {boolean} Returns `false`.
+	       * @example
+	       *
+	       * _.times(2, _.stubFalse);
+	       * // => [false, false]
+	       */
 
-	    if (this.length > 0) {
-	        for (var i = (this.length >> 1) - 1; i >= 0; i--) { this._down(i); }
-	    }
-	}
 
-	function defaultCompare$1(a, b) {
-	    return a < b ? -1 : a > b ? 1 : 0;
-	}
+	      function stubFalse() {
+	        return false;
+	      }
+	      /**
+	       * This method returns a new empty object.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.13.0
+	       * @category Util
+	       * @returns {Object} Returns the new empty object.
+	       * @example
+	       *
+	       * var objects = _.times(2, _.stubObject);
+	       *
+	       * console.log(objects);
+	       * // => [{}, {}]
+	       *
+	       * console.log(objects[0] === objects[1]);
+	       * // => false
+	       */
 
-	TinyQueue.prototype = {
 
-	    push: function (item) {
-	        this.data.push(item);
-	        this.length++;
-	        this._up(this.length - 1);
-	    },
+	      function stubObject() {
+	        return {};
+	      }
+	      /**
+	       * This method returns an empty string.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.13.0
+	       * @category Util
+	       * @returns {string} Returns the empty string.
+	       * @example
+	       *
+	       * _.times(2, _.stubString);
+	       * // => ['', '']
+	       */
 
-	    pop: function () {
-	        if (this.length === 0) { return undefined; }
 
-	        var top = this.data[0];
-	        this.length--;
+	      function stubString() {
+	        return '';
+	      }
+	      /**
+	       * This method returns `true`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.13.0
+	       * @category Util
+	       * @returns {boolean} Returns `true`.
+	       * @example
+	       *
+	       * _.times(2, _.stubTrue);
+	       * // => [true, true]
+	       */
 
-	        if (this.length > 0) {
-	            this.data[0] = this.data[this.length];
-	            this._down(0);
-	        }
-	        this.data.pop();
 
-	        return top;
-	    },
+	      function stubTrue() {
+	        return true;
+	      }
+	      /**
+	       * Invokes the iteratee `n` times, returning an array of the results of
+	       * each invocation. The iteratee is invoked with one argument; (index).
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {number} n The number of times to invoke `iteratee`.
+	       * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+	       * @returns {Array} Returns the array of results.
+	       * @example
+	       *
+	       * _.times(3, String);
+	       * // => ['0', '1', '2']
+	       *
+	       *  _.times(4, _.constant(0));
+	       * // => [0, 0, 0, 0]
+	       */
 
-	    peek: function () {
-	        return this.data[0];
-	    },
 
-	    _up: function (pos) {
-	        var data = this.data;
-	        var compare = this.compare;
-	        var item = data[pos];
+	      function times(n, iteratee) {
+	        n = toInteger(n);
 
-	        while (pos > 0) {
-	            var parent = (pos - 1) >> 1;
-	            var current = data[parent];
-	            if (compare(item, current) >= 0) { break; }
-	            data[pos] = current;
-	            pos = parent;
+	        if (n < 1 || n > MAX_SAFE_INTEGER) {
+	          return [];
 	        }
 
-	        data[pos] = item;
-	    },
+	        var index = MAX_ARRAY_LENGTH,
+	            length = nativeMin(n, MAX_ARRAY_LENGTH);
+	        iteratee = getIteratee(iteratee);
+	        n -= MAX_ARRAY_LENGTH;
+	        var result = baseTimes(length, iteratee);
 
-	    _down: function (pos) {
-	        var data = this.data;
-	        var compare = this.compare;
-	        var halfLength = this.length >> 1;
-	        var item = data[pos];
+	        while (++index < n) {
+	          iteratee(index);
+	        }
 
-	        while (pos < halfLength) {
-	            var left = (pos << 1) + 1;
-	            var right = left + 1;
-	            var best = data[left];
+	        return result;
+	      }
+	      /**
+	       * Converts `value` to a property path array.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Util
+	       * @param {*} value The value to convert.
+	       * @returns {Array} Returns the new property path array.
+	       * @example
+	       *
+	       * _.toPath('a.b.c');
+	       * // => ['a', 'b', 'c']
+	       *
+	       * _.toPath('a[0].b.c');
+	       * // => ['a', '0', 'b', 'c']
+	       */
 
-	            if (right < this.length && compare(data[right], best) < 0) {
-	                left = right;
-	                best = data[right];
-	            }
-	            if (compare(best, item) >= 0) { break; }
 
-	            data[pos] = best;
-	            pos = left;
+	      function toPath(value) {
+	        if (isArray(value)) {
+	          return arrayMap(value, toKey);
 	        }
 
-	        data[pos] = item;
-	    }
-	};
-	tinyqueue.default = _default$1;
+	        return isSymbol(value) ? [value] : copyArray(stringToPath(toString(value)));
+	      }
+	      /**
+	       * Generates a unique ID. If `prefix` is given, the ID is appended to it.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Util
+	       * @param {string} [prefix=''] The value to prefix the ID with.
+	       * @returns {string} Returns the unique ID.
+	       * @example
+	       *
+	       * _.uniqueId('contact_');
+	       * // => 'contact_104'
+	       *
+	       * _.uniqueId();
+	       * // => '105'
+	       */
 
-	var max$2 = Math.max;
-	var min = Math.min;
 
-	var contourId = 0;
+	      function uniqueId(prefix) {
+	        var id = ++idCounter;
+	        return toString(prefix) + id;
+	      }
+	      /*------------------------------------------------------------------------*/
+
+	      /**
+	       * Adds two numbers.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.4.0
+	       * @category Math
+	       * @param {number} augend The first number in an addition.
+	       * @param {number} addend The second number in an addition.
+	       * @returns {number} Returns the total.
+	       * @example
+	       *
+	       * _.add(6, 4);
+	       * // => 10
+	       */
 
 
-	function processPolygon(contourOrHole, isSubject, depth, Q, bbox, isExteriorRing) {
-	  var i, len, s1, s2, e1, e2;
-	  for (i = 0, len = contourOrHole.length - 1; i < len; i++) {
-	    s1 = contourOrHole[i];
-	    s2 = contourOrHole[i + 1];
-	    e1 = new SweepEvent(s1, false, undefined, isSubject);
-	    e2 = new SweepEvent(s2, false, e1,        isSubject);
-	    e1.otherEvent = e2;
+	      var add = createMathOperation(function (augend, addend) {
+	        return augend + addend;
+	      }, 0);
+	      /**
+	       * Computes `number` rounded up to `precision`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.10.0
+	       * @category Math
+	       * @param {number} number The number to round up.
+	       * @param {number} [precision=0] The precision to round up to.
+	       * @returns {number} Returns the rounded up number.
+	       * @example
+	       *
+	       * _.ceil(4.006);
+	       * // => 5
+	       *
+	       * _.ceil(6.004, 2);
+	       * // => 6.01
+	       *
+	       * _.ceil(6040, -2);
+	       * // => 6100
+	       */
 
-	    if (s1[0] === s2[0] && s1[1] === s2[1]) {
-	      continue; // skip collapsed edges, or it breaks
-	    }
+	      var ceil = createRound('ceil');
+	      /**
+	       * Divide two numbers.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.7.0
+	       * @category Math
+	       * @param {number} dividend The first number in a division.
+	       * @param {number} divisor The second number in a division.
+	       * @returns {number} Returns the quotient.
+	       * @example
+	       *
+	       * _.divide(6, 4);
+	       * // => 1.5
+	       */
 
-	    e1.contourId = e2.contourId = depth;
-	    if (!isExteriorRing) {
-	      e1.isExteriorRing = false;
-	      e2.isExteriorRing = false;
-	    }
-	    if (compareEvents(e1, e2) > 0) {
-	      e2.left = true;
-	    } else {
-	      e1.left = true;
-	    }
+	      var divide = createMathOperation(function (dividend, divisor) {
+	        return dividend / divisor;
+	      }, 1);
+	      /**
+	       * Computes `number` rounded down to `precision`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.10.0
+	       * @category Math
+	       * @param {number} number The number to round down.
+	       * @param {number} [precision=0] The precision to round down to.
+	       * @returns {number} Returns the rounded down number.
+	       * @example
+	       *
+	       * _.floor(4.006);
+	       * // => 4
+	       *
+	       * _.floor(0.046, 2);
+	       * // => 0.04
+	       *
+	       * _.floor(4060, -2);
+	       * // => 4000
+	       */
 
-	    var x = s1[0], y = s1[1];
-	    bbox[0] = min(bbox[0], x);
-	    bbox[1] = min(bbox[1], y);
-	    bbox[2] = max$2(bbox[2], x);
-	    bbox[3] = max$2(bbox[3], y);
+	      var floor = createRound('floor');
+	      /**
+	       * Computes the maximum value of `array`. If `array` is empty or falsey,
+	       * `undefined` is returned.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @returns {*} Returns the maximum value.
+	       * @example
+	       *
+	       * _.max([4, 2, 8, 6]);
+	       * // => 8
+	       *
+	       * _.max([]);
+	       * // => undefined
+	       */
 
-	    // Pushing it so the queue is sorted from left to right,
-	    // with object on the left having the highest priority.
-	    Q.push(e1);
-	    Q.push(e2);
-	  }
-	}
+	      function max(array) {
+	        return array && array.length ? baseExtremum(array, identity, baseGt) : undefined$1;
+	      }
+	      /**
+	       * This method is like `_.max` except that it accepts `iteratee` which is
+	       * invoked for each element in `array` to generate the criterion by which
+	       * the value is ranked. The iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {*} Returns the maximum value.
+	       * @example
+	       *
+	       * var objects = [{ 'n': 1 }, { 'n': 2 }];
+	       *
+	       * _.maxBy(objects, function(o) { return o.n; });
+	       * // => { 'n': 2 }
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.maxBy(objects, 'n');
+	       * // => { 'n': 2 }
+	       */
 
 
-	function fillQueue(subject, clipping, sbbox, cbbox, operation) {
-	  var eventQueue = new tinyqueue(null, compareEvents);
-	  var polygonSet, isExteriorRing, i, ii, j, jj; //, k, kk;
+	      function maxBy(array, iteratee) {
+	        return array && array.length ? baseExtremum(array, getIteratee(iteratee, 2), baseGt) : undefined$1;
+	      }
+	      /**
+	       * Computes the mean of the values in `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @returns {number} Returns the mean.
+	       * @example
+	       *
+	       * _.mean([4, 2, 8, 6]);
+	       * // => 5
+	       */
 
-	  for (i = 0, ii = subject.length; i < ii; i++) {
-	    polygonSet = subject[i];
-	    for (j = 0, jj = polygonSet.length; j < jj; j++) {
-	      isExteriorRing = j === 0;
-	      if (isExteriorRing) { contourId++; }
-	      processPolygon(polygonSet[j], true, contourId, eventQueue, sbbox, isExteriorRing);
-	    }
-	  }
 
-	  for (i = 0, ii = clipping.length; i < ii; i++) {
-	    polygonSet = clipping[i];
-	    for (j = 0, jj = polygonSet.length; j < jj; j++) {
-	      isExteriorRing = j === 0;
-	      if (operation === DIFFERENCE) { isExteriorRing = false; }
-	      if (isExteriorRing) { contourId++; }
-	      processPolygon(polygonSet[j], false, contourId, eventQueue, cbbox, isExteriorRing);
-	    }
-	  }
+	      function mean(array) {
+	        return baseMean(array, identity);
+	      }
+	      /**
+	       * This method is like `_.mean` except that it accepts `iteratee` which is
+	       * invoked for each element in `array` to generate the value to be averaged.
+	       * The iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.7.0
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {number} Returns the mean.
+	       * @example
+	       *
+	       * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
+	       *
+	       * _.meanBy(objects, function(o) { return o.n; });
+	       * // => 5
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.meanBy(objects, 'n');
+	       * // => 5
+	       */
 
-	  return eventQueue;
-	}
 
-	var EMPTY = [];
+	      function meanBy(array, iteratee) {
+	        return baseMean(array, getIteratee(iteratee, 2));
+	      }
+	      /**
+	       * Computes the minimum value of `array`. If `array` is empty or falsey,
+	       * `undefined` is returned.
+	       *
+	       * @static
+	       * @since 0.1.0
+	       * @memberOf _
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @returns {*} Returns the minimum value.
+	       * @example
+	       *
+	       * _.min([4, 2, 8, 6]);
+	       * // => 2
+	       *
+	       * _.min([]);
+	       * // => undefined
+	       */
 
 
-	function trivialOperation(subject, clipping, operation) {
-	  var result = null;
-	  if (subject.length * clipping.length === 0) {
-	    if        (operation === INTERSECTION) {
-	      result = EMPTY;
-	    } else if (operation === DIFFERENCE) {
-	      result = subject;
-	    } else if (operation === UNION ||
-	               operation === XOR) {
-	      result = (subject.length === 0) ? clipping : subject;
-	    }
-	  }
-	  return result;
-	}
+	      function min(array) {
+	        return array && array.length ? baseExtremum(array, identity, baseLt) : undefined$1;
+	      }
+	      /**
+	       * This method is like `_.min` except that it accepts `iteratee` which is
+	       * invoked for each element in `array` to generate the criterion by which
+	       * the value is ranked. The iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {*} Returns the minimum value.
+	       * @example
+	       *
+	       * var objects = [{ 'n': 1 }, { 'n': 2 }];
+	       *
+	       * _.minBy(objects, function(o) { return o.n; });
+	       * // => { 'n': 1 }
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.minBy(objects, 'n');
+	       * // => { 'n': 1 }
+	       */
 
 
-	function compareBBoxes(subject, clipping, sbbox, cbbox, operation) {
-	  var result = null;
-	  if (sbbox[0] > cbbox[2] ||
-	      cbbox[0] > sbbox[2] ||
-	      sbbox[1] > cbbox[3] ||
-	      cbbox[1] > sbbox[3]) {
-	    if        (operation === INTERSECTION) {
-	      result = EMPTY;
-	    } else if (operation === DIFFERENCE) {
-	      result = subject;
-	    } else if (operation === UNION ||
-	               operation === XOR) {
-	      result = subject.concat(clipping);
-	    }
-	  }
-	  return result;
-	}
+	      function minBy(array, iteratee) {
+	        return array && array.length ? baseExtremum(array, getIteratee(iteratee, 2), baseLt) : undefined$1;
+	      }
+	      /**
+	       * Multiply two numbers.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.7.0
+	       * @category Math
+	       * @param {number} multiplier The first number in a multiplication.
+	       * @param {number} multiplicand The second number in a multiplication.
+	       * @returns {number} Returns the product.
+	       * @example
+	       *
+	       * _.multiply(6, 4);
+	       * // => 24
+	       */
 
 
-	function boolean(subject, clipping, operation) {
-	  if (typeof subject[0][0][0] === 'number') {
-	    subject = [subject];
-	  }
-	  if (typeof clipping[0][0][0] === 'number') {
-	    clipping = [clipping];
-	  }
-	  var trivial = trivialOperation(subject, clipping, operation);
-	  if (trivial) {
-	    return trivial === EMPTY ? null : trivial;
-	  }
-	  var sbbox = [Infinity, Infinity, -Infinity, -Infinity];
-	  var cbbox = [Infinity, Infinity, -Infinity, -Infinity];
+	      var multiply = createMathOperation(function (multiplier, multiplicand) {
+	        return multiplier * multiplicand;
+	      }, 1);
+	      /**
+	       * Computes `number` rounded to `precision`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.10.0
+	       * @category Math
+	       * @param {number} number The number to round.
+	       * @param {number} [precision=0] The precision to round to.
+	       * @returns {number} Returns the rounded number.
+	       * @example
+	       *
+	       * _.round(4.006);
+	       * // => 4
+	       *
+	       * _.round(4.006, 2);
+	       * // => 4.01
+	       *
+	       * _.round(4060, -2);
+	       * // => 4100
+	       */
 
-	  // console.time('fill queue');
-	  var eventQueue = fillQueue(subject, clipping, sbbox, cbbox, operation);
-	  //console.timeEnd('fill queue');
+	      var round = createRound('round');
+	      /**
+	       * Subtract two numbers.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Math
+	       * @param {number} minuend The first number in a subtraction.
+	       * @param {number} subtrahend The second number in a subtraction.
+	       * @returns {number} Returns the difference.
+	       * @example
+	       *
+	       * _.subtract(6, 4);
+	       * // => 2
+	       */
 
-	  trivial = compareBBoxes(subject, clipping, sbbox, cbbox, operation);
-	  if (trivial) {
-	    return trivial === EMPTY ? null : trivial;
-	  }
-	  // console.time('subdivide edges');
-	  var sortedEvents = subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation);
-	  //console.timeEnd('subdivide edges');
+	      var subtract = createMathOperation(function (minuend, subtrahend) {
+	        return minuend - subtrahend;
+	      }, 0);
+	      /**
+	       * Computes the sum of the values in `array`.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 3.4.0
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @returns {number} Returns the sum.
+	       * @example
+	       *
+	       * _.sum([4, 2, 8, 6]);
+	       * // => 20
+	       */
+
+	      function sum(array) {
+	        return array && array.length ? baseSum(array, identity) : 0;
+	      }
+	      /**
+	       * This method is like `_.sum` except that it accepts `iteratee` which is
+	       * invoked for each element in `array` to generate the value to be summed.
+	       * The iteratee is invoked with one argument: (value).
+	       *
+	       * @static
+	       * @memberOf _
+	       * @since 4.0.0
+	       * @category Math
+	       * @param {Array} array The array to iterate over.
+	       * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+	       * @returns {number} Returns the sum.
+	       * @example
+	       *
+	       * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
+	       *
+	       * _.sumBy(objects, function(o) { return o.n; });
+	       * // => 20
+	       *
+	       * // The `_.property` iteratee shorthand.
+	       * _.sumBy(objects, 'n');
+	       * // => 20
+	       */
 
-	  // console.time('connect vertices');
-	  var contours = connectEdges(sortedEvents);
-	  //console.timeEnd('connect vertices');
 
-	  // Convert contours to polygons
-	  var polygons = [];
-	  for (var i = 0; i < contours.length; i++) {
-	    var contour = contours[i];
-	    if (contour.isExterior()) {
-	      // The exterior ring goes first
-	      var rings = [contour.points];
-	      // Followed by holes if any
-	      for (var j = 0; j < contour.holeIds.length; j++) {
-	        var holeId = contour.holeIds[j];
-	        rings.push(contours[holeId].points);
+	      function sumBy(array, iteratee) {
+	        return array && array.length ? baseSum(array, getIteratee(iteratee, 2)) : 0;
 	      }
-	      polygons.push(rings);
-	    }
-	  }
+	      /*------------------------------------------------------------------------*/
+	      // Add methods that return wrapped values in chain sequences.
+
+
+	      lodash.after = after;
+	      lodash.ary = ary;
+	      lodash.assign = assign;
+	      lodash.assignIn = assignIn;
+	      lodash.assignInWith = assignInWith;
+	      lodash.assignWith = assignWith;
+	      lodash.at = at;
+	      lodash.before = before;
+	      lodash.bind = bind;
+	      lodash.bindAll = bindAll;
+	      lodash.bindKey = bindKey;
+	      lodash.castArray = castArray;
+	      lodash.chain = chain;
+	      lodash.chunk = chunk;
+	      lodash.compact = compact;
+	      lodash.concat = concat;
+	      lodash.cond = cond;
+	      lodash.conforms = conforms;
+	      lodash.constant = constant;
+	      lodash.countBy = countBy;
+	      lodash.create = create;
+	      lodash.curry = curry;
+	      lodash.curryRight = curryRight;
+	      lodash.debounce = debounce;
+	      lodash.defaults = defaults;
+	      lodash.defaultsDeep = defaultsDeep;
+	      lodash.defer = defer;
+	      lodash.delay = delay;
+	      lodash.difference = difference;
+	      lodash.differenceBy = differenceBy;
+	      lodash.differenceWith = differenceWith;
+	      lodash.drop = drop;
+	      lodash.dropRight = dropRight;
+	      lodash.dropRightWhile = dropRightWhile;
+	      lodash.dropWhile = dropWhile;
+	      lodash.fill = fill;
+	      lodash.filter = filter;
+	      lodash.flatMap = flatMap;
+	      lodash.flatMapDeep = flatMapDeep;
+	      lodash.flatMapDepth = flatMapDepth;
+	      lodash.flatten = flatten;
+	      lodash.flattenDeep = flattenDeep;
+	      lodash.flattenDepth = flattenDepth;
+	      lodash.flip = flip;
+	      lodash.flow = flow;
+	      lodash.flowRight = flowRight;
+	      lodash.fromPairs = fromPairs;
+	      lodash.functions = functions;
+	      lodash.functionsIn = functionsIn;
+	      lodash.groupBy = groupBy;
+	      lodash.initial = initial;
+	      lodash.intersection = intersection;
+	      lodash.intersectionBy = intersectionBy;
+	      lodash.intersectionWith = intersectionWith;
+	      lodash.invert = invert;
+	      lodash.invertBy = invertBy;
+	      lodash.invokeMap = invokeMap;
+	      lodash.iteratee = iteratee;
+	      lodash.keyBy = keyBy;
+	      lodash.keys = keys;
+	      lodash.keysIn = keysIn;
+	      lodash.map = map;
+	      lodash.mapKeys = mapKeys;
+	      lodash.mapValues = mapValues;
+	      lodash.matches = matches;
+	      lodash.matchesProperty = matchesProperty;
+	      lodash.memoize = memoize;
+	      lodash.merge = merge;
+	      lodash.mergeWith = mergeWith;
+	      lodash.method = method;
+	      lodash.methodOf = methodOf;
+	      lodash.mixin = mixin;
+	      lodash.negate = negate;
+	      lodash.nthArg = nthArg;
+	      lodash.omit = omit;
+	      lodash.omitBy = omitBy;
+	      lodash.once = once;
+	      lodash.orderBy = orderBy;
+	      lodash.over = over;
+	      lodash.overArgs = overArgs;
+	      lodash.overEvery = overEvery;
+	      lodash.overSome = overSome;
+	      lodash.partial = partial;
+	      lodash.partialRight = partialRight;
+	      lodash.partition = partition;
+	      lodash.pick = pick;
+	      lodash.pickBy = pickBy;
+	      lodash.property = property;
+	      lodash.propertyOf = propertyOf;
+	      lodash.pull = pull;
+	      lodash.pullAll = pullAll;
+	      lodash.pullAllBy = pullAllBy;
+	      lodash.pullAllWith = pullAllWith;
+	      lodash.pullAt = pullAt;
+	      lodash.range = range;
+	      lodash.rangeRight = rangeRight;
+	      lodash.rearg = rearg;
+	      lodash.reject = reject;
+	      lodash.remove = remove;
+	      lodash.rest = rest;
+	      lodash.reverse = reverse;
+	      lodash.sampleSize = sampleSize;
+	      lodash.set = set;
+	      lodash.setWith = setWith;
+	      lodash.shuffle = shuffle;
+	      lodash.slice = slice;
+	      lodash.sortBy = sortBy;
+	      lodash.sortedUniq = sortedUniq;
+	      lodash.sortedUniqBy = sortedUniqBy;
+	      lodash.split = split;
+	      lodash.spread = spread;
+	      lodash.tail = tail;
+	      lodash.take = take;
+	      lodash.takeRight = takeRight;
+	      lodash.takeRightWhile = takeRightWhile;
+	      lodash.takeWhile = takeWhile;
+	      lodash.tap = tap;
+	      lodash.throttle = throttle;
+	      lodash.thru = thru;
+	      lodash.toArray = toArray;
+	      lodash.toPairs = toPairs;
+	      lodash.toPairsIn = toPairsIn;
+	      lodash.toPath = toPath;
+	      lodash.toPlainObject = toPlainObject;
+	      lodash.transform = transform;
+	      lodash.unary = unary;
+	      lodash.union = union;
+	      lodash.unionBy = unionBy;
+	      lodash.unionWith = unionWith;
+	      lodash.uniq = uniq;
+	      lodash.uniqBy = uniqBy;
+	      lodash.uniqWith = uniqWith;
+	      lodash.unset = unset;
+	      lodash.unzip = unzip;
+	      lodash.unzipWith = unzipWith;
+	      lodash.update = update;
+	      lodash.updateWith = updateWith;
+	      lodash.values = values;
+	      lodash.valuesIn = valuesIn;
+	      lodash.without = without;
+	      lodash.words = words;
+	      lodash.wrap = wrap;
+	      lodash.xor = xor;
+	      lodash.xorBy = xorBy;
+	      lodash.xorWith = xorWith;
+	      lodash.zip = zip;
+	      lodash.zipObject = zipObject;
+	      lodash.zipObjectDeep = zipObjectDeep;
+	      lodash.zipWith = zipWith; // Add aliases.
+
+	      lodash.entries = toPairs;
+	      lodash.entriesIn = toPairsIn;
+	      lodash.extend = assignIn;
+	      lodash.extendWith = assignInWith; // Add methods to `lodash.prototype`.
+
+	      mixin(lodash, lodash);
+	      /*------------------------------------------------------------------------*/
+	      // Add methods that return unwrapped values in chain sequences.
+
+	      lodash.add = add;
+	      lodash.attempt = attempt;
+	      lodash.camelCase = camelCase;
+	      lodash.capitalize = capitalize;
+	      lodash.ceil = ceil;
+	      lodash.clamp = clamp;
+	      lodash.clone = clone;
+	      lodash.cloneDeep = cloneDeep;
+	      lodash.cloneDeepWith = cloneDeepWith;
+	      lodash.cloneWith = cloneWith;
+	      lodash.conformsTo = conformsTo;
+	      lodash.deburr = deburr;
+	      lodash.defaultTo = defaultTo;
+	      lodash.divide = divide;
+	      lodash.endsWith = endsWith;
+	      lodash.eq = eq;
+	      lodash.escape = escape;
+	      lodash.escapeRegExp = escapeRegExp;
+	      lodash.every = every;
+	      lodash.find = find;
+	      lodash.findIndex = findIndex;
+	      lodash.findKey = findKey;
+	      lodash.findLast = findLast;
+	      lodash.findLastIndex = findLastIndex;
+	      lodash.findLastKey = findLastKey;
+	      lodash.floor = floor;
+	      lodash.forEach = forEach;
+	      lodash.forEachRight = forEachRight;
+	      lodash.forIn = forIn;
+	      lodash.forInRight = forInRight;
+	      lodash.forOwn = forOwn;
+	      lodash.forOwnRight = forOwnRight;
+	      lodash.get = get;
+	      lodash.gt = gt;
+	      lodash.gte = gte;
+	      lodash.has = has;
+	      lodash.hasIn = hasIn;
+	      lodash.head = head;
+	      lodash.identity = identity;
+	      lodash.includes = includes;
+	      lodash.indexOf = indexOf;
+	      lodash.inRange = inRange;
+	      lodash.invoke = invoke;
+	      lodash.isArguments = isArguments;
+	      lodash.isArray = isArray;
+	      lodash.isArrayBuffer = isArrayBuffer;
+	      lodash.isArrayLike = isArrayLike;
+	      lodash.isArrayLikeObject = isArrayLikeObject;
+	      lodash.isBoolean = isBoolean;
+	      lodash.isBuffer = isBuffer;
+	      lodash.isDate = isDate;
+	      lodash.isElement = isElement;
+	      lodash.isEmpty = isEmpty;
+	      lodash.isEqual = isEqual;
+	      lodash.isEqualWith = isEqualWith;
+	      lodash.isError = isError;
+	      lodash.isFinite = isFinite;
+	      lodash.isFunction = isFunction;
+	      lodash.isInteger = isInteger;
+	      lodash.isLength = isLength;
+	      lodash.isMap = isMap;
+	      lodash.isMatch = isMatch;
+	      lodash.isMatchWith = isMatchWith;
+	      lodash.isNaN = isNaN;
+	      lodash.isNative = isNative;
+	      lodash.isNil = isNil;
+	      lodash.isNull = isNull;
+	      lodash.isNumber = isNumber;
+	      lodash.isObject = isObject;
+	      lodash.isObjectLike = isObjectLike;
+	      lodash.isPlainObject = isPlainObject;
+	      lodash.isRegExp = isRegExp;
+	      lodash.isSafeInteger = isSafeInteger;
+	      lodash.isSet = isSet;
+	      lodash.isString = isString;
+	      lodash.isSymbol = isSymbol;
+	      lodash.isTypedArray = isTypedArray;
+	      lodash.isUndefined = isUndefined;
+	      lodash.isWeakMap = isWeakMap;
+	      lodash.isWeakSet = isWeakSet;
+	      lodash.join = join;
+	      lodash.kebabCase = kebabCase;
+	      lodash.last = last;
+	      lodash.lastIndexOf = lastIndexOf;
+	      lodash.lowerCase = lowerCase;
+	      lodash.lowerFirst = lowerFirst;
+	      lodash.lt = lt;
+	      lodash.lte = lte;
+	      lodash.max = max;
+	      lodash.maxBy = maxBy;
+	      lodash.mean = mean;
+	      lodash.meanBy = meanBy;
+	      lodash.min = min;
+	      lodash.minBy = minBy;
+	      lodash.stubArray = stubArray;
+	      lodash.stubFalse = stubFalse;
+	      lodash.stubObject = stubObject;
+	      lodash.stubString = stubString;
+	      lodash.stubTrue = stubTrue;
+	      lodash.multiply = multiply;
+	      lodash.nth = nth;
+	      lodash.noConflict = noConflict;
+	      lodash.noop = noop;
+	      lodash.now = now;
+	      lodash.pad = pad;
+	      lodash.padEnd = padEnd;
+	      lodash.padStart = padStart;
+	      lodash.parseInt = parseInt;
+	      lodash.random = random;
+	      lodash.reduce = reduce;
+	      lodash.reduceRight = reduceRight;
+	      lodash.repeat = repeat;
+	      lodash.replace = replace;
+	      lodash.result = result;
+	      lodash.round = round;
+	      lodash.runInContext = runInContext;
+	      lodash.sample = sample;
+	      lodash.size = size;
+	      lodash.snakeCase = snakeCase;
+	      lodash.some = some;
+	      lodash.sortedIndex = sortedIndex;
+	      lodash.sortedIndexBy = sortedIndexBy;
+	      lodash.sortedIndexOf = sortedIndexOf;
+	      lodash.sortedLastIndex = sortedLastIndex;
+	      lodash.sortedLastIndexBy = sortedLastIndexBy;
+	      lodash.sortedLastIndexOf = sortedLastIndexOf;
+	      lodash.startCase = startCase;
+	      lodash.startsWith = startsWith;
+	      lodash.subtract = subtract;
+	      lodash.sum = sum;
+	      lodash.sumBy = sumBy;
+	      lodash.template = template;
+	      lodash.times = times;
+	      lodash.toFinite = toFinite;
+	      lodash.toInteger = toInteger;
+	      lodash.toLength = toLength;
+	      lodash.toLower = toLower;
+	      lodash.toNumber = toNumber;
+	      lodash.toSafeInteger = toSafeInteger;
+	      lodash.toString = toString;
+	      lodash.toUpper = toUpper;
+	      lodash.trim = trim;
+	      lodash.trimEnd = trimEnd;
+	      lodash.trimStart = trimStart;
+	      lodash.truncate = truncate;
+	      lodash.unescape = unescape;
+	      lodash.uniqueId = uniqueId;
+	      lodash.upperCase = upperCase;
+	      lodash.upperFirst = upperFirst; // Add aliases.
+
+	      lodash.each = forEach;
+	      lodash.eachRight = forEachRight;
+	      lodash.first = head;
+	      mixin(lodash, function () {
+	        var source = {};
+	        baseForOwn(lodash, function (func, methodName) {
+	          if (!hasOwnProperty.call(lodash.prototype, methodName)) {
+	            source[methodName] = func;
+	          }
+	        });
+	        return source;
+	      }(), {
+	        'chain': false
+	      });
+	      /*------------------------------------------------------------------------*/
 
-	  return polygons;
-	}
+	      /**
+	       * The semantic version number.
+	       *
+	       * @static
+	       * @memberOf _
+	       * @type {string}
+	       */
 
-	function union (subject, clipping) {
-	  return boolean(subject, clipping, UNION);
-	}
+	      lodash.VERSION = VERSION; // Assign default placeholders.
 
-	var read$6 = function (buffer, offset, isLE, mLen, nBytes) {
-	  var e, m;
-	  var eLen = (nBytes * 8) - mLen - 1;
-	  var eMax = (1 << eLen) - 1;
-	  var eBias = eMax >> 1;
-	  var nBits = -7;
-	  var i = isLE ? (nBytes - 1) : 0;
-	  var d = isLE ? -1 : 1;
-	  var s = buffer[offset + i];
+	      arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function (methodName) {
+	        lodash[methodName].placeholder = lodash;
+	      }); // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
 
-	  i += d;
+	      arrayEach(['drop', 'take'], function (methodName, index) {
+	        LazyWrapper.prototype[methodName] = function (n) {
+	          n = n === undefined$1 ? 1 : nativeMax(toInteger(n), 0);
+	          var result = this.__filtered__ && !index ? new LazyWrapper(this) : this.clone();
 
-	  e = s & ((1 << (-nBits)) - 1);
-	  s >>= (-nBits);
-	  nBits += eLen;
-	  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+	          if (result.__filtered__) {
+	            result.__takeCount__ = nativeMin(n, result.__takeCount__);
+	          } else {
+	            result.__views__.push({
+	              'size': nativeMin(n, MAX_ARRAY_LENGTH),
+	              'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
+	            });
+	          }
 
-	  m = e & ((1 << (-nBits)) - 1);
-	  e >>= (-nBits);
-	  nBits += mLen;
-	  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+	          return result;
+	        };
 
-	  if (e === 0) {
-	    e = 1 - eBias;
-	  } else if (e === eMax) {
-	    return m ? NaN : ((s ? -1 : 1) * Infinity)
-	  } else {
-	    m = m + Math.pow(2, mLen);
-	    e = e - eBias;
-	  }
-	  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
-	};
+	        LazyWrapper.prototype[methodName + 'Right'] = function (n) {
+	          return this.reverse()[methodName](n).reverse();
+	        };
+	      }); // Add `LazyWrapper` methods that accept an `iteratee` value.
 
-	var write$6 = function (buffer, value, offset, isLE, mLen, nBytes) {
-	  var e, m, c;
-	  var eLen = (nBytes * 8) - mLen - 1;
-	  var eMax = (1 << eLen) - 1;
-	  var eBias = eMax >> 1;
-	  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0);
-	  var i = isLE ? 0 : (nBytes - 1);
-	  var d = isLE ? 1 : -1;
-	  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0;
+	      arrayEach(['filter', 'map', 'takeWhile'], function (methodName, index) {
+	        var type = index + 1,
+	            isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;
 
-	  value = Math.abs(value);
+	        LazyWrapper.prototype[methodName] = function (iteratee) {
+	          var result = this.clone();
 
-	  if (isNaN(value) || value === Infinity) {
-	    m = isNaN(value) ? 1 : 0;
-	    e = eMax;
-	  } else {
-	    e = Math.floor(Math.log(value) / Math.LN2);
-	    if (value * (c = Math.pow(2, -e)) < 1) {
-	      e--;
-	      c *= 2;
-	    }
-	    if (e + eBias >= 1) {
-	      value += rt / c;
-	    } else {
-	      value += rt * Math.pow(2, 1 - eBias);
-	    }
-	    if (value * c >= 2) {
-	      e++;
-	      c /= 2;
-	    }
+	          result.__iteratees__.push({
+	            'iteratee': getIteratee(iteratee, 3),
+	            'type': type
+	          });
 
-	    if (e + eBias >= eMax) {
-	      m = 0;
-	      e = eMax;
-	    } else if (e + eBias >= 1) {
-	      m = ((value * c) - 1) * Math.pow(2, mLen);
-	      e = e + eBias;
-	    } else {
-	      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
-	      e = 0;
-	    }
-	  }
+	          result.__filtered__ = result.__filtered__ || isFilter;
+	          return result;
+	        };
+	      }); // Add `LazyWrapper` methods for `_.head` and `_.last`.
 
-	  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
+	      arrayEach(['head', 'last'], function (methodName, index) {
+	        var takeName = 'take' + (index ? 'Right' : '');
 
-	  e = (e << mLen) | m;
-	  eLen += mLen;
-	  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+	        LazyWrapper.prototype[methodName] = function () {
+	          return this[takeName](1).value()[0];
+	        };
+	      }); // Add `LazyWrapper` methods for `_.initial` and `_.tail`.
 
-	  buffer[offset + i - d] |= s * 128;
-	};
+	      arrayEach(['initial', 'tail'], function (methodName, index) {
+	        var dropName = 'drop' + (index ? '' : 'Right');
 
-	var ieee754 = {
-		read: read$6,
-		write: write$6
-	};
+	        LazyWrapper.prototype[methodName] = function () {
+	          return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
+	        };
+	      });
 
-	var pbf = Pbf;
+	      LazyWrapper.prototype.compact = function () {
+	        return this.filter(identity);
+	      };
+
+	      LazyWrapper.prototype.find = function (predicate) {
+	        return this.filter(predicate).head();
+	      };
 
+	      LazyWrapper.prototype.findLast = function (predicate) {
+	        return this.reverse().find(predicate);
+	      };
 
+	      LazyWrapper.prototype.invokeMap = baseRest(function (path, args) {
+	        if (typeof path == 'function') {
+	          return new LazyWrapper(this);
+	        }
 
-	function Pbf(buf) {
-	    this.buf = ArrayBuffer.isView && ArrayBuffer.isView(buf) ? buf : new Uint8Array(buf || 0);
-	    this.pos = 0;
-	    this.type = 0;
-	    this.length = this.buf.length;
-	}
+	        return this.map(function (value) {
+	          return baseInvoke(value, path, args);
+	        });
+	      });
 
-	Pbf.Varint  = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
-	Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
-	Pbf.Bytes   = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
-	Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
+	      LazyWrapper.prototype.reject = function (predicate) {
+	        return this.filter(negate(getIteratee(predicate)));
+	      };
 
-	var SHIFT_LEFT_32 = (1 << 16) * (1 << 16),
-	    SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32;
+	      LazyWrapper.prototype.slice = function (start, end) {
+	        start = toInteger(start);
+	        var result = this;
 
-	// Threshold chosen based on both benchmarking and knowledge about browser string
-	// data structures (which currently switch structure types at 12 bytes or more)
-	var TEXT_DECODER_MIN_LENGTH = 12;
-	var utf8TextDecoder = typeof TextDecoder === 'undefined' ? null : new TextDecoder('utf8');
+	        if (result.__filtered__ && (start > 0 || end < 0)) {
+	          return new LazyWrapper(result);
+	        }
 
-	Pbf.prototype = {
+	        if (start < 0) {
+	          result = result.takeRight(-start);
+	        } else if (start) {
+	          result = result.drop(start);
+	        }
 
-	    destroy: function() {
-	        this.buf = null;
-	    },
+	        if (end !== undefined$1) {
+	          end = toInteger(end);
+	          result = end < 0 ? result.dropRight(-end) : result.take(end - start);
+	        }
 
-	    // === READING =================================================================
+	        return result;
+	      };
+
+	      LazyWrapper.prototype.takeRightWhile = function (predicate) {
+	        return this.reverse().takeWhile(predicate).reverse();
+	      };
 
-	    readFields: function(readField, result, end) {
-	        end = end || this.length;
+	      LazyWrapper.prototype.toArray = function () {
+	        return this.take(MAX_ARRAY_LENGTH);
+	      }; // Add `LazyWrapper` methods to `lodash.prototype`.
 
-	        while (this.pos < end) {
-	            var val = this.readVarint(),
-	                tag = val >> 3,
-	                startPos = this.pos;
 
-	            this.type = val & 0x7;
-	            readField(tag, result, this);
+	      baseForOwn(LazyWrapper.prototype, function (func, methodName) {
+	        var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
+	            isTaker = /^(?:head|last)$/.test(methodName),
+	            lodashFunc = lodash[isTaker ? 'take' + (methodName == 'last' ? 'Right' : '') : methodName],
+	            retUnwrapped = isTaker || /^find/.test(methodName);
 
-	            if (this.pos === startPos) { this.skip(val); }
+	        if (!lodashFunc) {
+	          return;
 	        }
-	        return result;
-	    },
 
-	    readMessage: function(readField, result) {
-	        return this.readFields(readField, result, this.readVarint() + this.pos);
-	    },
+	        lodash.prototype[methodName] = function () {
+	          var value = this.__wrapped__,
+	              args = isTaker ? [1] : arguments,
+	              isLazy = value instanceof LazyWrapper,
+	              iteratee = args[0],
+	              useLazy = isLazy || isArray(value);
 
-	    readFixed32: function() {
-	        var val = readUInt32(this.buf, this.pos);
-	        this.pos += 4;
-	        return val;
-	    },
+	          var interceptor = function interceptor(value) {
+	            var result = lodashFunc.apply(lodash, arrayPush([value], args));
+	            return isTaker && chainAll ? result[0] : result;
+	          };
 
-	    readSFixed32: function() {
-	        var val = readInt32(this.buf, this.pos);
-	        this.pos += 4;
-	        return val;
-	    },
+	          if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
+	            // Avoid lazy use if the iteratee has a "length" value other than `1`.
+	            isLazy = useLazy = false;
+	          }
 
-	    // 64-bit int handling is based on github.com/dpw/node-buffer-more-ints (MIT-licensed)
+	          var chainAll = this.__chain__,
+	              isHybrid = !!this.__actions__.length,
+	              isUnwrapped = retUnwrapped && !chainAll,
+	              onlyLazy = isLazy && !isHybrid;
 
-	    readFixed64: function() {
-	        var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
-	        this.pos += 8;
-	        return val;
-	    },
+	          if (!retUnwrapped && useLazy) {
+	            value = onlyLazy ? value : new LazyWrapper(this);
+	            var result = func.apply(value, args);
 
-	    readSFixed64: function() {
-	        var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
-	        this.pos += 8;
-	        return val;
-	    },
+	            result.__actions__.push({
+	              'func': thru,
+	              'args': [interceptor],
+	              'thisArg': undefined$1
+	            });
 
-	    readFloat: function() {
-	        var val = ieee754.read(this.buf, this.pos, true, 23, 4);
-	        this.pos += 4;
-	        return val;
-	    },
+	            return new LodashWrapper(result, chainAll);
+	          }
 
-	    readDouble: function() {
-	        var val = ieee754.read(this.buf, this.pos, true, 52, 8);
-	        this.pos += 8;
-	        return val;
-	    },
+	          if (isUnwrapped && onlyLazy) {
+	            return func.apply(this, args);
+	          }
 
-	    readVarint: function(isSigned) {
-	        var buf = this.buf,
-	            val, b;
+	          result = this.thru(interceptor);
+	          return isUnwrapped ? isTaker ? result.value()[0] : result.value() : result;
+	        };
+	      }); // Add `Array` methods to `lodash.prototype`.
 
-	        b = buf[this.pos++]; val  =  b & 0x7f;        if (b < 0x80) { return val; }
-	        b = buf[this.pos++]; val |= (b & 0x7f) << 7;  if (b < 0x80) { return val; }
-	        b = buf[this.pos++]; val |= (b & 0x7f) << 14; if (b < 0x80) { return val; }
-	        b = buf[this.pos++]; val |= (b & 0x7f) << 21; if (b < 0x80) { return val; }
-	        b = buf[this.pos];   val |= (b & 0x0f) << 28;
+	      arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function (methodName) {
+	        var func = arrayProto[methodName],
+	            chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
+	            retUnwrapped = /^(?:pop|shift)$/.test(methodName);
 
-	        return readVarintRemainder(val, isSigned, this);
-	    },
+	        lodash.prototype[methodName] = function () {
+	          var args = arguments;
 
-	    readVarint64: function() { // for compatibility with v2.0.1
-	        return this.readVarint(true);
-	    },
+	          if (retUnwrapped && !this.__chain__) {
+	            var value = this.value();
+	            return func.apply(isArray(value) ? value : [], args);
+	          }
 
-	    readSVarint: function() {
-	        var num = this.readVarint();
-	        return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding
-	    },
+	          return this[chainName](function (value) {
+	            return func.apply(isArray(value) ? value : [], args);
+	          });
+	        };
+	      }); // Map minified method names to their real names.
 
-	    readBoolean: function() {
-	        return Boolean(this.readVarint());
-	    },
+	      baseForOwn(LazyWrapper.prototype, function (func, methodName) {
+	        var lodashFunc = lodash[methodName];
+
+	        if (lodashFunc) {
+	          var key = lodashFunc.name + '';
 
-	    readString: function() {
-	        var end = this.readVarint() + this.pos;
-	        var pos = this.pos;
-	        this.pos = end;
+	          if (!hasOwnProperty.call(realNames, key)) {
+	            realNames[key] = [];
+	          }
 
-	        if (end - pos >= TEXT_DECODER_MIN_LENGTH && utf8TextDecoder) {
-	            // longer strings are fast with the built-in browser TextDecoder API
-	            return readUtf8TextDecoder(this.buf, pos, end);
+	          realNames[key].push({
+	            'name': methodName,
+	            'func': lodashFunc
+	          });
 	        }
-	        // short strings are fast with our custom implementation
-	        return readUtf8(this.buf, pos, end);
-	    },
+	      });
+	      realNames[createHybrid(undefined$1, WRAP_BIND_KEY_FLAG).name] = [{
+	        'name': 'wrapper',
+	        'func': undefined$1
+	      }]; // Add methods to `LazyWrapper`.
+
+	      LazyWrapper.prototype.clone = lazyClone;
+	      LazyWrapper.prototype.reverse = lazyReverse;
+	      LazyWrapper.prototype.value = lazyValue; // Add chain sequence methods to the `lodash` wrapper.
+
+	      lodash.prototype.at = wrapperAt;
+	      lodash.prototype.chain = wrapperChain;
+	      lodash.prototype.commit = wrapperCommit;
+	      lodash.prototype.next = wrapperNext;
+	      lodash.prototype.plant = wrapperPlant;
+	      lodash.prototype.reverse = wrapperReverse;
+	      lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue; // Add lazy aliases.
+
+	      lodash.prototype.first = lodash.prototype.head;
+
+	      if (symIterator) {
+	        lodash.prototype[symIterator] = wrapperToIterator;
+	      }
 
-	    readBytes: function() {
-	        var end = this.readVarint() + this.pos,
-	            buffer = this.buf.subarray(this.pos, end);
-	        this.pos = end;
-	        return buffer;
-	    },
+	      return lodash;
+	    };
+	    /*--------------------------------------------------------------------------*/
+	    // Export lodash.
 
-	    // verbose for performance reasons; doesn't affect gzipped size
 
-	    readPackedVarint: function(arr, isSigned) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readVarint(isSigned)); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readVarint(isSigned)); }
-	        return arr;
-	    },
-	    readPackedSVarint: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readSVarint()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readSVarint()); }
-	        return arr;
-	    },
-	    readPackedBoolean: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readBoolean()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readBoolean()); }
-	        return arr;
-	    },
-	    readPackedFloat: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readFloat()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readFloat()); }
-	        return arr;
-	    },
-	    readPackedDouble: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readDouble()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readDouble()); }
-	        return arr;
-	    },
-	    readPackedFixed32: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readFixed32()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readFixed32()); }
-	        return arr;
-	    },
-	    readPackedSFixed32: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readSFixed32()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readSFixed32()); }
-	        return arr;
-	    },
-	    readPackedFixed64: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readFixed64()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readFixed64()); }
-	        return arr;
-	    },
-	    readPackedSFixed64: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readSFixed64()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readSFixed64()); }
-	        return arr;
-	    },
+	    var _ = runInContext(); // Some AMD build optimizers, like r.js, check for condition patterns like:
 
-	    skip: function(val) {
-	        var type = val & 0x7;
-	        if (type === Pbf.Varint) { while (this.buf[this.pos++] > 0x7f) {} }
-	        else if (type === Pbf.Bytes) { this.pos = this.readVarint() + this.pos; }
-	        else if (type === Pbf.Fixed32) { this.pos += 4; }
-	        else if (type === Pbf.Fixed64) { this.pos += 8; }
-	        else { throw new Error('Unimplemented type: ' + type); }
-	    },
 
-	    // === WRITING =================================================================
+	    if (freeModule) {
+	      // Export for Node.js.
+	      (freeModule.exports = _)._ = _; // Export for CommonJS support.
 
-	    writeTag: function(tag, type) {
-	        this.writeVarint((tag << 3) | type);
-	    },
+	      freeExports._ = _;
+	    } else {
+	      // Export to the global object.
+	      root._ = _;
+	    }
+	  }).call(commonjsGlobal);
+	})(lodash, lodash.exports);
 
-	    realloc: function(min) {
-	        var length = this.length || 16;
+	function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
+	  discardTags = discardTags || {};
+	  var _option = 'safe'; // 'safe', 'force_local', 'force_remote'
 
-	        while (length < this.pos + min) { length *= 2; }
+	  var _conflicts = [];
 
-	        if (length !== this.length) {
-	            var buf = new Uint8Array(length);
-	            buf.set(this.buf);
-	            this.buf = buf;
-	            this.length = length;
-	        }
-	    },
+	  function user(d) {
+	    return typeof formatUser === 'function' ? formatUser(d) : lodash.exports.escape(d);
+	  }
 
-	    finish: function() {
-	        this.length = this.pos;
-	        this.pos = 0;
-	        return this.buf.subarray(0, this.length);
-	    },
+	  function mergeLocation(remote, target) {
+	    function pointEqual(a, b) {
+	      var epsilon = 1e-6;
+	      return Math.abs(a[0] - b[0]) < epsilon && Math.abs(a[1] - b[1]) < epsilon;
+	    }
 
-	    writeFixed32: function(val) {
-	        this.realloc(4);
-	        writeInt32(this.buf, val, this.pos);
-	        this.pos += 4;
-	    },
+	    if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
+	      return target;
+	    }
 
-	    writeSFixed32: function(val) {
-	        this.realloc(4);
-	        writeInt32(this.buf, val, this.pos);
-	        this.pos += 4;
-	    },
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        loc: remote.loc
+	      });
+	    }
 
-	    writeFixed64: function(val) {
-	        this.realloc(8);
-	        writeInt32(this.buf, val & -1, this.pos);
-	        writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
-	        this.pos += 8;
-	    },
+	    _conflicts.push(_t.html('merge_remote_changes.conflict.location', {
+	      user: {
+	        html: user(remote.user)
+	      }
+	    }));
 
-	    writeSFixed64: function(val) {
-	        this.realloc(8);
-	        writeInt32(this.buf, val & -1, this.pos);
-	        writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
-	        this.pos += 8;
-	    },
+	    return target;
+	  }
+
+	  function mergeNodes(base, remote, target) {
+	    if (_option === 'force_local' || fastDeepEqual(target.nodes, remote.nodes)) {
+	      return target;
+	    }
 
-	    writeVarint: function(val) {
-	        val = +val || 0;
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        nodes: remote.nodes
+	      });
+	    }
 
-	        if (val > 0xfffffff || val < 0) {
-	            writeBigVarint(val, this);
-	            return;
+	    var ccount = _conflicts.length;
+	    var o = base.nodes || [];
+	    var a = target.nodes || [];
+	    var b = remote.nodes || [];
+	    var nodes = [];
+	    var hunks = diff3Merge(a, o, b, {
+	      excludeFalseConflicts: true
+	    });
+
+	    for (var i = 0; i < hunks.length; i++) {
+	      var hunk = hunks[i];
+
+	      if (hunk.ok) {
+	        nodes.push.apply(nodes, hunk.ok);
+	      } else {
+	        // for all conflicts, we can assume c.a !== c.b
+	        // because `diff3Merge` called with `true` option to exclude false conflicts..
+	        var c = hunk.conflict;
+
+	        if (fastDeepEqual(c.o, c.a)) {
+	          // only changed remotely
+	          nodes.push.apply(nodes, c.b);
+	        } else if (fastDeepEqual(c.o, c.b)) {
+	          // only changed locally
+	          nodes.push.apply(nodes, c.a);
+	        } else {
+	          // changed both locally and remotely
+	          _conflicts.push(_t.html('merge_remote_changes.conflict.nodelist', {
+	            user: {
+	              html: user(remote.user)
+	            }
+	          }));
+
+	          break;
 	        }
+	      }
+	    }
 
-	        this.realloc(4);
+	    return _conflicts.length === ccount ? target.update({
+	      nodes: nodes
+	    }) : target;
+	  }
 
-	        this.buf[this.pos++] =           val & 0x7f  | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) { return; }
-	        this.buf[this.pos++] = ((val >>>= 7) & 0x7f) | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) { return; }
-	        this.buf[this.pos++] = ((val >>>= 7) & 0x7f) | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) { return; }
-	        this.buf[this.pos++] =   (val >>> 7) & 0x7f;
-	    },
+	  function mergeChildren(targetWay, children, updates, graph) {
+	    function isUsed(node, targetWay) {
+	      var hasInterestingParent = graph.parentWays(node).some(function (way) {
+	        return way.id !== targetWay.id;
+	      });
+	      return node.hasInterestingTags() || hasInterestingParent || graph.parentRelations(node).length > 0;
+	    }
 
-	    writeSVarint: function(val) {
-	        this.writeVarint(val < 0 ? -val * 2 - 1 : val * 2);
-	    },
+	    var ccount = _conflicts.length;
 
-	    writeBoolean: function(val) {
-	        this.writeVarint(Boolean(val));
-	    },
+	    for (var i = 0; i < children.length; i++) {
+	      var id = children[i];
+	      var node = graph.hasEntity(id); // remove unused childNodes..
 
-	    writeString: function(str) {
-	        str = String(str);
-	        this.realloc(str.length * 4);
+	      if (targetWay.nodes.indexOf(id) === -1) {
+	        if (node && !isUsed(node, targetWay)) {
+	          updates.removeIds.push(id);
+	        }
 
-	        this.pos++; // reserve 1 byte for short string length
+	        continue;
+	      } // restore used childNodes..
 
-	        var startPos = this.pos;
-	        // write the string directly to the buffer and see how much was written
-	        this.pos = writeUtf8(this.buf, str, this.pos);
-	        var len = this.pos - startPos;
 
-	        if (len >= 0x80) { makeRoomForExtraLength(startPos, len, this); }
+	      var local = localGraph.hasEntity(id);
+	      var remote = remoteGraph.hasEntity(id);
+	      var target;
 
-	        // finally, write the message length in the reserved place and restore the position
-	        this.pos = startPos - 1;
-	        this.writeVarint(len);
-	        this.pos += len;
-	    },
+	      if (_option === 'force_remote' && remote && remote.visible) {
+	        updates.replacements.push(remote);
+	      } else if (_option === 'force_local' && local) {
+	        target = osmEntity(local);
 
-	    writeFloat: function(val) {
-	        this.realloc(4);
-	        ieee754.write(this.buf, val, this.pos, true, 23, 4);
-	        this.pos += 4;
-	    },
+	        if (remote) {
+	          target = target.update({
+	            version: remote.version
+	          });
+	        }
 
-	    writeDouble: function(val) {
-	        this.realloc(8);
-	        ieee754.write(this.buf, val, this.pos, true, 52, 8);
-	        this.pos += 8;
-	    },
+	        updates.replacements.push(target);
+	      } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
+	        target = osmEntity(local, {
+	          version: remote.version
+	        });
 
-	    writeBytes: function(buffer) {
-	        var len = buffer.length;
-	        this.writeVarint(len);
-	        this.realloc(len);
-	        for (var i = 0; i < len; i++) { this.buf[this.pos++] = buffer[i]; }
-	    },
+	        if (remote.visible) {
+	          target = mergeLocation(remote, target);
+	        } else {
+	          _conflicts.push(_t.html('merge_remote_changes.conflict.deleted', {
+	            user: {
+	              html: user(remote.user)
+	            }
+	          }));
+	        }
 
-	    writeRawMessage: function(fn, obj) {
-	        this.pos++; // reserve 1 byte for short message length
+	        if (_conflicts.length !== ccount) break;
+	        updates.replacements.push(target);
+	      }
+	    }
 
-	        // write the message directly to the buffer and see how much was written
-	        var startPos = this.pos;
-	        fn(obj, this);
-	        var len = this.pos - startPos;
+	    return targetWay;
+	  }
 
-	        if (len >= 0x80) { makeRoomForExtraLength(startPos, len, this); }
+	  function updateChildren(updates, graph) {
+	    for (var i = 0; i < updates.replacements.length; i++) {
+	      graph = graph.replace(updates.replacements[i]);
+	    }
 
-	        // finally, write the message length in the reserved place and restore the position
-	        this.pos = startPos - 1;
-	        this.writeVarint(len);
-	        this.pos += len;
-	    },
+	    if (updates.removeIds.length) {
+	      graph = actionDeleteMultiple(updates.removeIds)(graph);
+	    }
 
-	    writeMessage: function(tag, fn, obj) {
-	        this.writeTag(tag, Pbf.Bytes);
-	        this.writeRawMessage(fn, obj);
-	    },
+	    return graph;
+	  }
 
-	    writePackedVarint:   function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedVarint, arr); }   },
-	    writePackedSVarint:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedSVarint, arr); }  },
-	    writePackedBoolean:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedBoolean, arr); }  },
-	    writePackedFloat:    function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedFloat, arr); }    },
-	    writePackedDouble:   function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedDouble, arr); }   },
-	    writePackedFixed32:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedFixed32, arr); }  },
-	    writePackedSFixed32: function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedSFixed32, arr); } },
-	    writePackedFixed64:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedFixed64, arr); }  },
-	    writePackedSFixed64: function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedSFixed64, arr); } },
-
-	    writeBytesField: function(tag, buffer) {
-	        this.writeTag(tag, Pbf.Bytes);
-	        this.writeBytes(buffer);
-	    },
-	    writeFixed32Field: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed32);
-	        this.writeFixed32(val);
-	    },
-	    writeSFixed32Field: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed32);
-	        this.writeSFixed32(val);
-	    },
-	    writeFixed64Field: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed64);
-	        this.writeFixed64(val);
-	    },
-	    writeSFixed64Field: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed64);
-	        this.writeSFixed64(val);
-	    },
-	    writeVarintField: function(tag, val) {
-	        this.writeTag(tag, Pbf.Varint);
-	        this.writeVarint(val);
-	    },
-	    writeSVarintField: function(tag, val) {
-	        this.writeTag(tag, Pbf.Varint);
-	        this.writeSVarint(val);
-	    },
-	    writeStringField: function(tag, str) {
-	        this.writeTag(tag, Pbf.Bytes);
-	        this.writeString(str);
-	    },
-	    writeFloatField: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed32);
-	        this.writeFloat(val);
-	    },
-	    writeDoubleField: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed64);
-	        this.writeDouble(val);
-	    },
-	    writeBooleanField: function(tag, val) {
-	        this.writeVarintField(tag, Boolean(val));
+	  function mergeMembers(remote, target) {
+	    if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
+	      return target;
 	    }
-	};
 
-	function readVarintRemainder(l, s, p) {
-	    var buf = p.buf,
-	        h, b;
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        members: remote.members
+	      });
+	    }
 
-	    b = buf[p.pos++]; h  = (b & 0x70) >> 4;  if (b < 0x80) { return toNum(l, h, s); }
-	    b = buf[p.pos++]; h |= (b & 0x7f) << 3;  if (b < 0x80) { return toNum(l, h, s); }
-	    b = buf[p.pos++]; h |= (b & 0x7f) << 10; if (b < 0x80) { return toNum(l, h, s); }
-	    b = buf[p.pos++]; h |= (b & 0x7f) << 17; if (b < 0x80) { return toNum(l, h, s); }
-	    b = buf[p.pos++]; h |= (b & 0x7f) << 24; if (b < 0x80) { return toNum(l, h, s); }
-	    b = buf[p.pos++]; h |= (b & 0x01) << 31; if (b < 0x80) { return toNum(l, h, s); }
+	    _conflicts.push(_t.html('merge_remote_changes.conflict.memberlist', {
+	      user: {
+	        html: user(remote.user)
+	      }
+	    }));
 
-	    throw new Error('Expected varint not more than 10 bytes');
-	}
+	    return target;
+	  }
 
-	function readPackedEnd(pbf) {
-	    return pbf.type === Pbf.Bytes ?
-	        pbf.readVarint() + pbf.pos : pbf.pos + 1;
-	}
+	  function mergeTags(base, remote, target) {
+	    if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
+	      return target;
+	    }
 
-	function toNum(low, high, isSigned) {
-	    if (isSigned) {
-	        return high * 0x100000000 + (low >>> 0);
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        tags: remote.tags
+	      });
 	    }
 
-	    return ((high >>> 0) * 0x100000000) + (low >>> 0);
-	}
+	    var ccount = _conflicts.length;
+	    var o = base.tags || {};
+	    var a = target.tags || {};
+	    var b = remote.tags || {};
+	    var keys = utilArrayUnion(utilArrayUnion(Object.keys(o), Object.keys(a)), Object.keys(b)).filter(function (k) {
+	      return !discardTags[k];
+	    });
+	    var tags = Object.assign({}, a); // shallow copy
 
-	function writeBigVarint(val, pbf) {
-	    var low, high;
+	    var changed = false;
 
-	    if (val >= 0) {
-	        low  = (val % 0x100000000) | 0;
-	        high = (val / 0x100000000) | 0;
-	    } else {
-	        low  = ~(-val % 0x100000000);
-	        high = ~(-val / 0x100000000);
+	    for (var i = 0; i < keys.length; i++) {
+	      var k = keys[i];
 
-	        if (low ^ 0xffffffff) {
-	            low = (low + 1) | 0;
+	      if (o[k] !== b[k] && a[k] !== b[k]) {
+	        // changed remotely..
+	        if (o[k] !== a[k]) {
+	          // changed locally..
+	          _conflicts.push(_t.html('merge_remote_changes.conflict.tags', {
+	            tag: k,
+	            local: a[k],
+	            remote: b[k],
+	            user: {
+	              html: user(remote.user)
+	            }
+	          }));
 	        } else {
-	            low = 0;
-	            high = (high + 1) | 0;
+	          // unchanged locally, accept remote change..
+	          if (b.hasOwnProperty(k)) {
+	            tags[k] = b[k];
+	          } else {
+	            delete tags[k];
+	          }
+
+	          changed = true;
 	        }
+	      }
 	    }
 
-	    if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
-	        throw new Error('Given varint doesn\'t fit into 10 bytes');
-	    }
+	    return changed && _conflicts.length === ccount ? target.update({
+	      tags: tags
+	    }) : target;
+	  } //  `graph.base()` is the common ancestor of the two graphs.
+	  //  `localGraph` contains user's edits up to saving
+	  //  `remoteGraph` contains remote edits to modified nodes
+	  //  `graph` must be a descendent of `localGraph` and may include
+	  //      some conflict resolution actions performed on it.
+	  //
+	  //                  --- ... --- `localGraph` -- ... -- `graph`
+	  //                 /
+	  //  `graph.base()` --- ... --- `remoteGraph`
+	  //
 
-	    pbf.realloc(10);
 
-	    writeBigVarintLow(low, high, pbf);
-	    writeBigVarintHigh(high, pbf);
-	}
+	  var action = function action(graph) {
+	    var updates = {
+	      replacements: [],
+	      removeIds: []
+	    };
+	    var base = graph.base().entities[id];
+	    var local = localGraph.entity(id);
+	    var remote = remoteGraph.entity(id);
+	    var target = osmEntity(local, {
+	      version: remote.version
+	    }); // delete/undelete
 
-	function writeBigVarintLow(low, high, pbf) {
-	    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-	    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-	    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-	    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-	    pbf.buf[pbf.pos]   = low & 0x7f;
-	}
+	    if (!remote.visible) {
+	      if (_option === 'force_remote') {
+	        return actionDeleteMultiple([id])(graph);
+	      } else if (_option === 'force_local') {
+	        if (target.type === 'way') {
+	          target = mergeChildren(target, utilArrayUniq(local.nodes), updates, graph);
+	          graph = updateChildren(updates, graph);
+	        }
 
-	function writeBigVarintHigh(high, pbf) {
-	    var lsb = (high & 0x07) << 4;
+	        return graph.replace(target);
+	      } else {
+	        _conflicts.push(_t.html('merge_remote_changes.conflict.deleted', {
+	          user: {
+	            html: user(remote.user)
+	          }
+	        }));
 
-	    pbf.buf[pbf.pos++] |= lsb         | ((high >>>= 3) ? 0x80 : 0); if (!high) { return; }
-	    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-	    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-	    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-	    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-	    pbf.buf[pbf.pos++]  = high & 0x7f;
-	}
+	        return graph; // do nothing
+	      }
+	    } // merge
 
-	function makeRoomForExtraLength(startPos, len, pbf) {
-	    var extraLen =
-	        len <= 0x3fff ? 1 :
-	        len <= 0x1fffff ? 2 :
-	        len <= 0xfffffff ? 3 : Math.floor(Math.log(len) / (Math.LN2 * 7));
 
-	    // if 1 byte isn't enough for encoding message length, shift the data to the right
-	    pbf.realloc(extraLen);
-	    for (var i = pbf.pos - 1; i >= startPos; i--) { pbf.buf[i + extraLen] = pbf.buf[i]; }
-	}
+	    if (target.type === 'node') {
+	      target = mergeLocation(remote, target);
+	    } else if (target.type === 'way') {
+	      // pull in any child nodes that may not be present locally..
+	      graph.rebase(remoteGraph.childNodes(remote), [graph], false);
+	      target = mergeNodes(base, remote, target);
+	      target = mergeChildren(target, utilArrayUnion(local.nodes, remote.nodes), updates, graph);
+	    } else if (target.type === 'relation') {
+	      target = mergeMembers(remote, target);
+	    }
 
-	function writePackedVarint(arr, pbf)   { for (var i = 0; i < arr.length; i++) { pbf.writeVarint(arr[i]); }   }
-	function writePackedSVarint(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeSVarint(arr[i]); }  }
-	function writePackedFloat(arr, pbf)    { for (var i = 0; i < arr.length; i++) { pbf.writeFloat(arr[i]); }    }
-	function writePackedDouble(arr, pbf)   { for (var i = 0; i < arr.length; i++) { pbf.writeDouble(arr[i]); }   }
-	function writePackedBoolean(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeBoolean(arr[i]); }  }
-	function writePackedFixed32(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeFixed32(arr[i]); }  }
-	function writePackedSFixed32(arr, pbf) { for (var i = 0; i < arr.length; i++) { pbf.writeSFixed32(arr[i]); } }
-	function writePackedFixed64(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeFixed64(arr[i]); }  }
-	function writePackedSFixed64(arr, pbf) { for (var i = 0; i < arr.length; i++) { pbf.writeSFixed64(arr[i]); } }
+	    target = mergeTags(base, remote, target);
 
-	// Buffer code below from https://github.com/feross/buffer, MIT-licensed
+	    if (!_conflicts.length) {
+	      graph = updateChildren(updates, graph).replace(target);
+	    }
 
-	function readUInt32(buf, pos) {
-	    return ((buf[pos]) |
-	        (buf[pos + 1] << 8) |
-	        (buf[pos + 2] << 16)) +
-	        (buf[pos + 3] * 0x1000000);
-	}
+	    return graph;
+	  };
 
-	function writeInt32(buf, val, pos) {
-	    buf[pos] = val;
-	    buf[pos + 1] = (val >>> 8);
-	    buf[pos + 2] = (val >>> 16);
-	    buf[pos + 3] = (val >>> 24);
-	}
+	  action.withOption = function (opt) {
+	    _option = opt;
+	    return action;
+	  };
 
-	function readInt32(buf, pos) {
-	    return ((buf[pos]) |
-	        (buf[pos + 1] << 8) |
-	        (buf[pos + 2] << 16)) +
-	        (buf[pos + 3] << 24);
+	  action.conflicts = function () {
+	    return _conflicts;
+	  };
+
+	  return action;
 	}
 
-	function readUtf8(buf, pos, end) {
-	    var str = '';
-	    var i = pos;
+	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
 
-	    while (i < end) {
-	        var b0 = buf[i];
-	        var c = null; // codepoint
-	        var bytesPerSequence =
-	            b0 > 0xEF ? 4 :
-	            b0 > 0xDF ? 3 :
-	            b0 > 0xBF ? 2 : 1;
+	function actionMove(moveIDs, tryDelta, projection, cache) {
+	  var _delta = tryDelta;
 
-	        if (i + bytesPerSequence > end) { break; }
+	  function setupCache(graph) {
+	    function canMove(nodeID) {
+	      // Allow movement of any node that is in the selectedIDs list..
+	      if (moveIDs.indexOf(nodeID) !== -1) return true; // Allow movement of a vertex where 2 ways meet..
 
-	        var b1, b2, b3;
+	      var parents = graph.parentWays(graph.entity(nodeID));
+	      if (parents.length < 3) return true; // Restrict movement of a vertex where >2 ways meet, unless all parentWays are moving too..
 
-	        if (bytesPerSequence === 1) {
-	            if (b0 < 0x80) {
-	                c = b0;
-	            }
-	        } else if (bytesPerSequence === 2) {
-	            b1 = buf[i + 1];
-	            if ((b1 & 0xC0) === 0x80) {
-	                c = (b0 & 0x1F) << 0x6 | (b1 & 0x3F);
-	                if (c <= 0x7F) {
-	                    c = null;
-	                }
-	            }
-	        } else if (bytesPerSequence === 3) {
-	            b1 = buf[i + 1];
-	            b2 = buf[i + 2];
-	            if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
-	                c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | (b2 & 0x3F);
-	                if (c <= 0x7FF || (c >= 0xD800 && c <= 0xDFFF)) {
-	                    c = null;
-	                }
-	            }
-	        } else if (bytesPerSequence === 4) {
-	            b1 = buf[i + 1];
-	            b2 = buf[i + 2];
-	            b3 = buf[i + 3];
-	            if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
-	                c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | (b3 & 0x3F);
-	                if (c <= 0xFFFF || c >= 0x110000) {
-	                    c = null;
-	                }
-	            }
-	        }
+	      var parentsMoving = parents.every(function (way) {
+	        return cache.moving[way.id];
+	      });
+	      if (!parentsMoving) delete cache.moving[nodeID];
+	      return parentsMoving;
+	    }
 
-	        if (c === null) {
-	            c = 0xFFFD;
-	            bytesPerSequence = 1;
+	    function cacheEntities(ids) {
+	      for (var i = 0; i < ids.length; i++) {
+	        var id = ids[i];
+	        if (cache.moving[id]) continue;
+	        cache.moving[id] = true;
+	        var entity = graph.hasEntity(id);
+	        if (!entity) continue;
 
-	        } else if (c > 0xFFFF) {
-	            c -= 0x10000;
-	            str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
-	            c = 0xDC00 | c & 0x3FF;
+	        if (entity.type === 'node') {
+	          cache.nodes.push(id);
+	          cache.startLoc[id] = entity.loc;
+	        } else if (entity.type === 'way') {
+	          cache.ways.push(id);
+	          cacheEntities(entity.nodes);
+	        } else {
+	          cacheEntities(entity.members.map(function (member) {
+	            return member.id;
+	          }));
 	        }
-
-	        str += String.fromCharCode(c);
-	        i += bytesPerSequence;
+	      }
 	    }
 
-	    return str;
-	}
+	    function cacheIntersections(ids) {
+	      function isEndpoint(way, id) {
+	        return !way.isClosed() && !!way.affix(id);
+	      }
 
-	function readUtf8TextDecoder(buf, pos, end) {
-	    return utf8TextDecoder.decode(buf.subarray(pos, end));
-	}
+	      for (var i = 0; i < ids.length; i++) {
+	        var id = ids[i]; // consider only intersections with 1 moved and 1 unmoved way.
 
-	function writeUtf8(buf, str, pos) {
-	    for (var i = 0, c, lead; i < str.length; i++) {
-	        c = str.charCodeAt(i); // code point
-
-	        if (c > 0xD7FF && c < 0xE000) {
-	            if (lead) {
-	                if (c < 0xDC00) {
-	                    buf[pos++] = 0xEF;
-	                    buf[pos++] = 0xBF;
-	                    buf[pos++] = 0xBD;
-	                    lead = c;
-	                    continue;
-	                } else {
-	                    c = lead - 0xD800 << 10 | c - 0xDC00 | 0x10000;
-	                    lead = null;
-	                }
-	            } else {
-	                if (c > 0xDBFF || (i + 1 === str.length)) {
-	                    buf[pos++] = 0xEF;
-	                    buf[pos++] = 0xBF;
-	                    buf[pos++] = 0xBD;
-	                } else {
-	                    lead = c;
-	                }
-	                continue;
-	            }
-	        } else if (lead) {
-	            buf[pos++] = 0xEF;
-	            buf[pos++] = 0xBF;
-	            buf[pos++] = 0xBD;
-	            lead = null;
-	        }
+	        var childNodes = graph.childNodes(graph.entity(id));
 
-	        if (c < 0x80) {
-	            buf[pos++] = c;
-	        } else {
-	            if (c < 0x800) {
-	                buf[pos++] = c >> 0x6 | 0xC0;
-	            } else {
-	                if (c < 0x10000) {
-	                    buf[pos++] = c >> 0xC | 0xE0;
-	                } else {
-	                    buf[pos++] = c >> 0x12 | 0xF0;
-	                    buf[pos++] = c >> 0xC & 0x3F | 0x80;
-	                }
-	                buf[pos++] = c >> 0x6 & 0x3F | 0x80;
+	        for (var j = 0; j < childNodes.length; j++) {
+	          var node = childNodes[j];
+	          var parents = graph.parentWays(node);
+	          if (parents.length !== 2) continue;
+	          var moved = graph.entity(id);
+	          var unmoved = null;
+
+	          for (var k = 0; k < parents.length; k++) {
+	            var way = parents[k];
+
+	            if (!cache.moving[way.id]) {
+	              unmoved = way;
+	              break;
 	            }
-	            buf[pos++] = c & 0x3F | 0x80;
+	          }
+
+	          if (!unmoved) continue; // exclude ways that are overly connected..
+
+	          if (utilArrayIntersection(moved.nodes, unmoved.nodes).length > 2) continue;
+	          if (moved.isArea() || unmoved.isArea()) continue;
+	          cache.intersections.push({
+	            nodeId: node.id,
+	            movedId: moved.id,
+	            unmovedId: unmoved.id,
+	            movedIsEP: isEndpoint(moved, node.id),
+	            unmovedIsEP: isEndpoint(unmoved, node.id)
+	          });
 	        }
+	      }
 	    }
-	    return pos;
-	}
 
-	var pointGeometry = Point;
+	    if (!cache) {
+	      cache = {};
+	    }
 
-	/**
-	 * A standalone point geometry with useful accessor, comparison, and
-	 * modification methods.
-	 *
-	 * @class Point
-	 * @param {Number} x the x-coordinate. this could be longitude or screen
-	 * pixels, or any other sort of unit.
-	 * @param {Number} y the y-coordinate. this could be latitude or screen
-	 * pixels, or any other sort of unit.
-	 * @example
-	 * var point = new Point(-77, 38);
-	 */
-	function Point(x, y) {
-	    this.x = x;
-	    this.y = y;
-	}
+	    if (!cache.ok) {
+	      cache.moving = {};
+	      cache.intersections = [];
+	      cache.replacedVertex = {};
+	      cache.startLoc = {};
+	      cache.nodes = [];
+	      cache.ways = [];
+	      cacheEntities(moveIDs);
+	      cacheIntersections(cache.ways);
+	      cache.nodes = cache.nodes.filter(canMove);
+	      cache.ok = true;
+	    }
+	  } // Place a vertex where the moved vertex used to be, to preserve way shape..
+	  //
+	  //  Start:
+	  //      b ---- e
+	  //     / \
+	  //    /   \
+	  //   /     \
+	  //  a       c
+	  //
+	  //      *               node '*' added to preserve shape
+	  //     / \
+	  //    /   b ---- e      way `b,e` moved here:
+	  //   /     \
+	  //  a       c
+	  //
+	  //
 
-	Point.prototype = {
 
-	    /**
-	     * Clone this point, returning a new point that can be modified
-	     * without affecting the old one.
-	     * @return {Point} the clone
-	     */
-	    clone: function() { return new Point(this.x, this.y); },
+	  function replaceMovedVertex(nodeId, wayId, graph, delta) {
+	    var way = graph.entity(wayId);
+	    var moved = graph.entity(nodeId);
+	    var movedIndex = way.nodes.indexOf(nodeId);
+	    var len, prevIndex, nextIndex;
 
-	    /**
-	     * Add this point's x & y coordinates to another point,
-	     * yielding a new point.
-	     * @param {Point} p the other point
-	     * @return {Point} output point
-	     */
-	    add:     function(p) { return this.clone()._add(p); },
+	    if (way.isClosed()) {
+	      len = way.nodes.length - 1;
+	      prevIndex = (movedIndex + len - 1) % len;
+	      nextIndex = (movedIndex + len + 1) % len;
+	    } else {
+	      len = way.nodes.length;
+	      prevIndex = movedIndex - 1;
+	      nextIndex = movedIndex + 1;
+	    }
 
-	    /**
-	     * Subtract this point's x & y coordinates to from point,
-	     * yielding a new point.
-	     * @param {Point} p the other point
-	     * @return {Point} output point
-	     */
-	    sub:     function(p) { return this.clone()._sub(p); },
+	    var prev = graph.hasEntity(way.nodes[prevIndex]);
+	    var next = graph.hasEntity(way.nodes[nextIndex]); // Don't add orig vertex at endpoint..
 
-	    /**
-	     * Multiply this point's x & y coordinates by point,
-	     * yielding a new point.
-	     * @param {Point} p the other point
-	     * @return {Point} output point
-	     */
-	    multByPoint:    function(p) { return this.clone()._multByPoint(p); },
+	    if (!prev || !next) return graph;
+	    var key = wayId + '_' + nodeId;
+	    var orig = cache.replacedVertex[key];
 
-	    /**
-	     * Divide this point's x & y coordinates by point,
-	     * yielding a new point.
-	     * @param {Point} p the other point
-	     * @return {Point} output point
-	     */
-	    divByPoint:     function(p) { return this.clone()._divByPoint(p); },
+	    if (!orig) {
+	      orig = osmNode();
+	      cache.replacedVertex[key] = orig;
+	      cache.startLoc[orig.id] = cache.startLoc[nodeId];
+	    }
 
-	    /**
-	     * Multiply this point's x & y coordinates by a factor,
-	     * yielding a new point.
-	     * @param {Point} k factor
-	     * @return {Point} output point
-	     */
-	    mult:    function(k) { return this.clone()._mult(k); },
+	    var start, end;
 
-	    /**
-	     * Divide this point's x & y coordinates by a factor,
-	     * yielding a new point.
-	     * @param {Point} k factor
-	     * @return {Point} output point
-	     */
-	    div:     function(k) { return this.clone()._div(k); },
+	    if (delta) {
+	      start = projection(cache.startLoc[nodeId]);
+	      end = projection.invert(geoVecAdd(start, delta));
+	    } else {
+	      end = cache.startLoc[nodeId];
+	    }
 
-	    /**
-	     * Rotate this point around the 0, 0 origin by an angle a,
-	     * given in radians
-	     * @param {Number} a angle to rotate around, in radians
-	     * @return {Point} output point
-	     */
-	    rotate:  function(a) { return this.clone()._rotate(a); },
+	    orig = orig.move(end);
+	    var angle = Math.abs(geoAngle(orig, prev, projection) - geoAngle(orig, next, projection)) * 180 / Math.PI; // Don't add orig vertex if it would just make a straight line..
 
-	    /**
-	     * Rotate this point around p point by an angle a,
-	     * given in radians
-	     * @param {Number} a angle to rotate around, in radians
-	     * @param {Point} p Point to rotate around
-	     * @return {Point} output point
-	     */
-	    rotateAround:  function(a,p) { return this.clone()._rotateAround(a,p); },
+	    if (angle > 175 && angle < 185) return graph; // moving forward or backward along way?
 
-	    /**
-	     * Multiply this point by a 4x1 transformation matrix
-	     * @param {Array<Number>} m transformation matrix
-	     * @return {Point} output point
-	     */
-	    matMult: function(m) { return this.clone()._matMult(m); },
+	    var p1 = [prev.loc, orig.loc, moved.loc, next.loc].map(projection);
+	    var p2 = [prev.loc, moved.loc, orig.loc, next.loc].map(projection);
+	    var d1 = geoPathLength(p1);
+	    var d2 = geoPathLength(p2);
+	    var insertAt = d1 <= d2 ? movedIndex : nextIndex; // moving around closed loop?
 
-	    /**
-	     * Calculate this point but as a unit vector from 0, 0, meaning
-	     * that the distance from the resulting point to the 0, 0
-	     * coordinate will be equal to 1 and the angle from the resulting
-	     * point to the 0, 0 coordinate will be the same as before.
-	     * @return {Point} unit vector point
-	     */
-	    unit:    function() { return this.clone()._unit(); },
+	    if (way.isClosed() && insertAt === 0) insertAt = len;
+	    way = way.addNode(orig.id, insertAt);
+	    return graph.replace(orig).replace(way);
+	  } // Remove duplicate vertex that might have been added by
+	  // replaceMovedVertex.  This is done after the unzorro checks.
 
-	    /**
-	     * Compute a perpendicular point, where the new y coordinate
-	     * is the old x coordinate and the new x coordinate is the old y
-	     * coordinate multiplied by -1
-	     * @return {Point} perpendicular point
-	     */
-	    perp:    function() { return this.clone()._perp(); },
 
-	    /**
-	     * Return a version of this point with the x & y coordinates
-	     * rounded to integers.
-	     * @return {Point} rounded point
-	     */
-	    round:   function() { return this.clone()._round(); },
+	  function removeDuplicateVertices(wayId, graph) {
+	    var way = graph.entity(wayId);
+	    var epsilon = 1e-6;
+	    var prev, curr;
 
-	    /**
-	     * Return the magitude of this point: this is the Euclidean
-	     * distance from the 0, 0 coordinate to this point's x and y
-	     * coordinates.
-	     * @return {Number} magnitude
-	     */
-	    mag: function() {
-	        return Math.sqrt(this.x * this.x + this.y * this.y);
-	    },
+	    function isInteresting(node, graph) {
+	      return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+	    }
 
-	    /**
-	     * Judge whether this point is equal to another point, returning
-	     * true or false.
-	     * @param {Point} other the other point
-	     * @return {boolean} whether the points are equal
-	     */
-	    equals: function(other) {
-	        return this.x === other.x &&
-	               this.y === other.y;
-	    },
+	    for (var i = 0; i < way.nodes.length; i++) {
+	      curr = graph.entity(way.nodes[i]);
 
-	    /**
-	     * Calculate the distance from this point to another point
-	     * @param {Point} p the other point
-	     * @return {Number} distance
-	     */
-	    dist: function(p) {
-	        return Math.sqrt(this.distSqr(p));
-	    },
+	      if (prev && curr && geoVecEqual(prev.loc, curr.loc, epsilon)) {
+	        if (!isInteresting(prev, graph)) {
+	          way = way.removeNode(prev.id);
+	          graph = graph.replace(way).remove(prev);
+	        } else if (!isInteresting(curr, graph)) {
+	          way = way.removeNode(curr.id);
+	          graph = graph.replace(way).remove(curr);
+	        }
+	      }
 
-	    /**
-	     * Calculate the distance from this point to another point,
-	     * without the square root step. Useful if you're comparing
-	     * relative distances.
-	     * @param {Point} p the other point
-	     * @return {Number} distance
-	     */
-	    distSqr: function(p) {
-	        var dx = p.x - this.x,
-	            dy = p.y - this.y;
-	        return dx * dx + dy * dy;
-	    },
+	      prev = curr;
+	    }
 
-	    /**
-	     * Get the angle from the 0, 0 coordinate to this point, in radians
-	     * coordinates.
-	     * @return {Number} angle
-	     */
-	    angle: function() {
-	        return Math.atan2(this.y, this.x);
-	    },
+	    return graph;
+	  } // Reorder nodes around intersections that have moved..
+	  //
+	  //  Start:                way1.nodes: b,e         (moving)
+	  //  a - b - c ----- d     way2.nodes: a,b,c,d     (static)
+	  //      |                 vertex: b
+	  //      e                 isEP1: true,  isEP2, false
+	  //
+	  //  way1 `b,e` moved here:
+	  //  a ----- c = b - d
+	  //              |
+	  //              e
+	  //
+	  //  reorder nodes         way1.nodes: b,e
+	  //  a ----- c - b - d     way2.nodes: a,c,b,d
+	  //              |
+	  //              e
+	  //
 
-	    /**
-	     * Get the angle from this point to another point, in radians
-	     * @param {Point} b the other point
-	     * @return {Number} angle
-	     */
-	    angleTo: function(b) {
-	        return Math.atan2(this.y - b.y, this.x - b.x);
-	    },
 
-	    /**
-	     * Get the angle between this point and another point, in radians
-	     * @param {Point} b the other point
-	     * @return {Number} angle
-	     */
-	    angleWith: function(b) {
-	        return this.angleWithSep(b.x, b.y);
-	    },
+	  function unZorroIntersection(intersection, graph) {
+	    var vertex = graph.entity(intersection.nodeId);
+	    var way1 = graph.entity(intersection.movedId);
+	    var way2 = graph.entity(intersection.unmovedId);
+	    var isEP1 = intersection.movedIsEP;
+	    var isEP2 = intersection.unmovedIsEP; // don't move the vertex if it is the endpoint of both ways.
 
-	    /*
-	     * Find the angle of the two vectors, solving the formula for
-	     * the cross product a x b = |a||b|sin(θ) for θ.
-	     * @param {Number} x the x-coordinate
-	     * @param {Number} y the y-coordinate
-	     * @return {Number} the angle in radians
-	     */
-	    angleWithSep: function(x, y) {
-	        return Math.atan2(
-	            this.x * y - this.y * x,
-	            this.x * x + this.y * y);
-	    },
+	    if (isEP1 && isEP2) return graph;
+	    var nodes1 = graph.childNodes(way1).filter(function (n) {
+	      return n !== vertex;
+	    });
+	    var nodes2 = graph.childNodes(way2).filter(function (n) {
+	      return n !== vertex;
+	    });
+	    if (way1.isClosed() && way1.first() === vertex.id) nodes1.push(nodes1[0]);
+	    if (way2.isClosed() && way2.first() === vertex.id) nodes2.push(nodes2[0]);
+	    var edge1 = !isEP1 && geoChooseEdge(nodes1, projection(vertex.loc), projection);
+	    var edge2 = !isEP2 && geoChooseEdge(nodes2, projection(vertex.loc), projection);
+	    var loc; // snap vertex to nearest edge (or some point between them)..
+
+	    if (!isEP1 && !isEP2) {
+	      var epsilon = 1e-6,
+	          maxIter = 10;
+
+	      for (var i = 0; i < maxIter; i++) {
+	        loc = geoVecInterp(edge1.loc, edge2.loc, 0.5);
+	        edge1 = geoChooseEdge(nodes1, projection(loc), projection);
+	        edge2 = geoChooseEdge(nodes2, projection(loc), projection);
+	        if (Math.abs(edge1.distance - edge2.distance) < epsilon) break;
+	      }
+	    } else if (!isEP1) {
+	      loc = edge1.loc;
+	    } else {
+	      loc = edge2.loc;
+	    }
 
-	    _matMult: function(m) {
-	        var x = m[0] * this.x + m[1] * this.y,
-	            y = m[2] * this.x + m[3] * this.y;
-	        this.x = x;
-	        this.y = y;
-	        return this;
-	    },
+	    graph = graph.replace(vertex.move(loc)); // if zorro happened, reorder nodes..
 
-	    _add: function(p) {
-	        this.x += p.x;
-	        this.y += p.y;
-	        return this;
-	    },
+	    if (!isEP1 && edge1.index !== way1.nodes.indexOf(vertex.id)) {
+	      way1 = way1.removeNode(vertex.id).addNode(vertex.id, edge1.index);
+	      graph = graph.replace(way1);
+	    }
 
-	    _sub: function(p) {
-	        this.x -= p.x;
-	        this.y -= p.y;
-	        return this;
-	    },
+	    if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
+	      way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
+	      graph = graph.replace(way2);
+	    }
 
-	    _mult: function(k) {
-	        this.x *= k;
-	        this.y *= k;
-	        return this;
-	    },
+	    return graph;
+	  }
 
-	    _div: function(k) {
-	        this.x /= k;
-	        this.y /= k;
-	        return this;
-	    },
+	  function cleanupIntersections(graph) {
+	    for (var i = 0; i < cache.intersections.length; i++) {
+	      var obj = cache.intersections[i];
+	      graph = replaceMovedVertex(obj.nodeId, obj.movedId, graph, _delta);
+	      graph = replaceMovedVertex(obj.nodeId, obj.unmovedId, graph, null);
+	      graph = unZorroIntersection(obj, graph);
+	      graph = removeDuplicateVertices(obj.movedId, graph);
+	      graph = removeDuplicateVertices(obj.unmovedId, graph);
+	    }
 
-	    _multByPoint: function(p) {
-	        this.x *= p.x;
-	        this.y *= p.y;
-	        return this;
-	    },
+	    return graph;
+	  } // check if moving way endpoint can cross an unmoved way, if so limit delta..
 
-	    _divByPoint: function(p) {
-	        this.x /= p.x;
-	        this.y /= p.y;
-	        return this;
-	    },
 
-	    _unit: function() {
-	        this._div(this.mag());
-	        return this;
-	    },
+	  function limitDelta(graph) {
+	    function moveNode(loc) {
+	      return geoVecAdd(projection(loc), _delta);
+	    }
 
-	    _perp: function() {
-	        var y = this.y;
-	        this.y = this.x;
-	        this.x = -y;
-	        return this;
-	    },
+	    for (var i = 0; i < cache.intersections.length; i++) {
+	      var obj = cache.intersections[i]; // Don't limit movement if this is vertex joins 2 endpoints..
 
-	    _rotate: function(angle) {
-	        var cos = Math.cos(angle),
-	            sin = Math.sin(angle),
-	            x = cos * this.x - sin * this.y,
-	            y = sin * this.x + cos * this.y;
-	        this.x = x;
-	        this.y = y;
-	        return this;
-	    },
+	      if (obj.movedIsEP && obj.unmovedIsEP) continue; // Don't limit movement if this vertex is not an endpoint anyway..
 
-	    _rotateAround: function(angle, p) {
-	        var cos = Math.cos(angle),
-	            sin = Math.sin(angle),
-	            x = p.x + cos * (this.x - p.x) - sin * (this.y - p.y),
-	            y = p.y + sin * (this.x - p.x) + cos * (this.y - p.y);
-	        this.x = x;
-	        this.y = y;
-	        return this;
-	    },
+	      if (!obj.movedIsEP) continue;
+	      var node = graph.entity(obj.nodeId);
+	      var start = projection(node.loc);
+	      var end = geoVecAdd(start, _delta);
+	      var movedNodes = graph.childNodes(graph.entity(obj.movedId));
+	      var movedPath = movedNodes.map(function (n) {
+	        return moveNode(n.loc);
+	      });
+	      var unmovedNodes = graph.childNodes(graph.entity(obj.unmovedId));
+	      var unmovedPath = unmovedNodes.map(function (n) {
+	        return projection(n.loc);
+	      });
+	      var hits = geoPathIntersections(movedPath, unmovedPath);
 
-	    _round: function() {
-	        this.x = Math.round(this.x);
-	        this.y = Math.round(this.y);
-	        return this;
+	      for (var j = 0; i < hits.length; i++) {
+	        if (geoVecEqual(hits[j], end)) continue;
+	        var edge = geoChooseEdge(unmovedNodes, end, projection);
+	        _delta = geoVecSubtract(projection(edge.loc), start);
+	      }
 	    }
-	};
+	  }
 
-	/**
-	 * Construct a point from an array if necessary, otherwise if the input
-	 * is already a Point, or an unknown type, return it unchanged
-	 * @param {Array<Number>|Point|*} a any kind of input value
-	 * @return {Point} constructed point, or passed-through value.
-	 * @example
-	 * // this
-	 * var point = Point.convert([0, 1]);
-	 * // is equivalent to
-	 * var point = new Point(0, 1);
-	 */
-	Point.convert = function (a) {
-	    if (a instanceof Point) {
-	        return a;
+	  var action = function action(graph) {
+	    if (_delta[0] === 0 && _delta[1] === 0) return graph;
+	    setupCache(graph);
+
+	    if (cache.intersections.length) {
+	      limitDelta(graph);
 	    }
-	    if (Array.isArray(a)) {
-	        return new Point(a[0], a[1]);
+
+	    for (var i = 0; i < cache.nodes.length; i++) {
+	      var node = graph.entity(cache.nodes[i]);
+	      var start = projection(node.loc);
+	      var end = geoVecAdd(start, _delta);
+	      graph = graph.replace(node.move(projection.invert(end)));
 	    }
-	    return a;
-	};
 
-	var vectortilefeature = VectorTileFeature;
+	    if (cache.intersections.length) {
+	      graph = cleanupIntersections(graph);
+	    }
 
-	function VectorTileFeature(pbf, end, extent, keys, values) {
-	    // Public
-	    this.properties = {};
-	    this.extent = extent;
-	    this.type = 0;
+	    return graph;
+	  };
 
-	    // Private
-	    this._pbf = pbf;
-	    this._geometry = -1;
-	    this._keys = keys;
-	    this._values = values;
+	  action.delta = function () {
+	    return _delta;
+	  };
 
-	    pbf.readFields(readFeature, this, end);
+	  return action;
 	}
 
-	function readFeature(tag, feature, pbf) {
-	    if (tag == 1) { feature.id = pbf.readVarint(); }
-	    else if (tag == 2) { readTag(pbf, feature); }
-	    else if (tag == 3) { feature.type = pbf.readVarint(); }
-	    else if (tag == 4) { feature._geometry = pbf.pos; }
+	function actionMoveMember(relationId, fromIndex, toIndex) {
+	  return function (graph) {
+	    return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
+	  };
 	}
 
-	function readTag(pbf, feature) {
-	    var end = pbf.readVarint() + pbf.pos;
+	function actionMoveNode(nodeID, toLoc) {
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var node = graph.entity(nodeID);
+	    return graph.replace(node.move(geoVecInterp(node.loc, toLoc, t)));
+	  };
 
-	    while (pbf.pos < end) {
-	        var key = feature._keys[pbf.readVarint()],
-	            value = feature._values[pbf.readVarint()];
-	        feature.properties[key] = value;
-	    }
+	  action.transitionable = true;
+	  return action;
 	}
 
-	VectorTileFeature.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
+	function actionNoop() {
+	  return function (graph) {
+	    return graph;
+	  };
+	}
 
-	VectorTileFeature.prototype.loadGeometry = function() {
-	    var pbf = this._pbf;
-	    pbf.pos = this._geometry;
+	function actionOrthogonalize(wayID, projection, vertexID, degThresh, ep) {
+	  var epsilon = ep || 1e-4;
+	  var threshold = degThresh || 13; // degrees within right or straight to alter
+	  // We test normalized dot products so we can compare as cos(angle)
 
-	    var end = pbf.readVarint() + pbf.pos,
-	        cmd = 1,
-	        length = 0,
-	        x = 0,
-	        y = 0,
-	        lines = [],
-	        line;
+	  var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+	  var upperThreshold = Math.cos(threshold * Math.PI / 180);
 
-	    while (pbf.pos < end) {
-	        if (length <= 0) {
-	            var cmdLen = pbf.readVarint();
-	            cmd = cmdLen & 0x7;
-	            length = cmdLen >> 3;
-	        }
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var way = graph.entity(wayID);
+	    way = way.removeNode(''); // sanity check - remove any consecutive duplicates
 
-	        length--;
+	    if (way.tags.nonsquare) {
+	      var tags = Object.assign({}, way.tags); // since we're squaring, remove indication that this is physically unsquare
 
-	        if (cmd === 1 || cmd === 2) {
-	            x += pbf.readSVarint();
-	            y += pbf.readSVarint();
+	      delete tags.nonsquare;
+	      way = way.update({
+	        tags: tags
+	      });
+	    }
 
-	            if (cmd === 1) { // moveTo
-	                if (line) { lines.push(line); }
-	                line = [];
-	            }
+	    graph = graph.replace(way);
+	    var isClosed = way.isClosed();
+	    var nodes = graph.childNodes(way).slice(); // shallow copy
 
-	            line.push(new pointGeometry(x, y));
+	    if (isClosed) nodes.pop();
 
-	        } else if (cmd === 7) {
+	    if (vertexID !== undefined) {
+	      nodes = nodeSubset(nodes, vertexID, isClosed);
+	      if (nodes.length !== 3) return graph;
+	    } // note: all geometry functions here use the unclosed node/point/coord list
 
-	            // Workaround for https://github.com/mapbox/mapnik-vector-tile/issues/90
-	            if (line) {
-	                line.push(line[0].clone()); // closePolygon
-	            }
 
-	        } else {
-	            throw new Error('unknown command ' + cmd);
-	        }
+	    var nodeCount = {};
+	    var points = [];
+	    var corner = {
+	      i: 0,
+	      dotp: 1
+	    };
+	    var node, point, loc, score, motions, i, j;
+
+	    for (i = 0; i < nodes.length; i++) {
+	      node = nodes[i];
+	      nodeCount[node.id] = (nodeCount[node.id] || 0) + 1;
+	      points.push({
+	        id: node.id,
+	        coord: projection(node.loc)
+	      });
 	    }
 
-	    if (line) { lines.push(line); }
+	    if (points.length === 3) {
+	      // move only one vertex for right triangle
+	      for (i = 0; i < 1000; i++) {
+	        motions = points.map(calcMotion);
+	        points[corner.i].coord = geoVecAdd(points[corner.i].coord, motions[corner.i]);
+	        score = corner.dotp;
 
-	    return lines;
-	};
+	        if (score < epsilon) {
+	          break;
+	        }
+	      }
 
-	VectorTileFeature.prototype.bbox = function() {
-	    var pbf = this._pbf;
-	    pbf.pos = this._geometry;
+	      node = graph.entity(nodes[corner.i].id);
+	      loc = projection.invert(points[corner.i].coord);
+	      graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+	    } else {
+	      var straights = [];
+	      var simplified = []; // Remove points from nearly straight sections..
+	      // This produces a simplified shape to orthogonalize
 
-	    var end = pbf.readVarint() + pbf.pos,
-	        cmd = 1,
-	        length = 0,
-	        x = 0,
-	        y = 0,
-	        x1 = Infinity,
-	        x2 = -Infinity,
-	        y1 = Infinity,
-	        y2 = -Infinity;
+	      for (i = 0; i < points.length; i++) {
+	        point = points[i];
+	        var dotp = 0;
 
-	    while (pbf.pos < end) {
-	        if (length <= 0) {
-	            var cmdLen = pbf.readVarint();
-	            cmd = cmdLen & 0x7;
-	            length = cmdLen >> 3;
+	        if (isClosed || i > 0 && i < points.length - 1) {
+	          var a = points[(i - 1 + points.length) % points.length];
+	          var b = points[(i + 1) % points.length];
+	          dotp = Math.abs(geoOrthoNormalizedDotProduct(a.coord, b.coord, point.coord));
 	        }
 
-	        length--;
-
-	        if (cmd === 1 || cmd === 2) {
-	            x += pbf.readSVarint();
-	            y += pbf.readSVarint();
-	            if (x < x1) { x1 = x; }
-	            if (x > x2) { x2 = x; }
-	            if (y < y1) { y1 = y; }
-	            if (y > y2) { y2 = y; }
-
-	        } else if (cmd !== 7) {
-	            throw new Error('unknown command ' + cmd);
+	        if (dotp > upperThreshold) {
+	          straights.push(point);
+	        } else {
+	          simplified.push(point);
 	        }
-	    }
+	      } // Orthogonalize the simplified shape
 
-	    return [x1, y1, x2, y2];
-	};
 
-	VectorTileFeature.prototype.toGeoJSON = function(x, y, z) {
-	    var size = this.extent * Math.pow(2, z),
-	        x0 = this.extent * x,
-	        y0 = this.extent * y,
-	        coords = this.loadGeometry(),
-	        type = VectorTileFeature.types[this.type],
-	        i, j;
+	      var bestPoints = clonePoints(simplified);
+	      var originalPoints = clonePoints(simplified);
+	      score = Infinity;
 
-	    function project(line) {
-	        for (var j = 0; j < line.length; j++) {
-	            var p = line[j], y2 = 180 - (p.y + y0) * 360 / size;
-	            line[j] = [
-	                (p.x + x0) * 360 / size - 180,
-	                360 / Math.PI * Math.atan(Math.exp(y2 * Math.PI / 180)) - 90
-	            ];
-	        }
-	    }
+	      for (i = 0; i < 1000; i++) {
+	        motions = simplified.map(calcMotion);
 
-	    switch (this.type) {
-	    case 1:
-	        var points = [];
-	        for (i = 0; i < coords.length; i++) {
-	            points[i] = coords[i][0];
+	        for (j = 0; j < motions.length; j++) {
+	          simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
 	        }
-	        coords = points;
-	        project(coords);
-	        break;
 
-	    case 2:
-	        for (i = 0; i < coords.length; i++) {
-	            project(coords[i]);
-	        }
-	        break;
+	        var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
 
-	    case 3:
-	        coords = classifyRings(coords);
-	        for (i = 0; i < coords.length; i++) {
-	            for (j = 0; j < coords[i].length; j++) {
-	                project(coords[i][j]);
-	            }
+	        if (newScore < score) {
+	          bestPoints = clonePoints(simplified);
+	          score = newScore;
 	        }
-	        break;
-	    }
-
-	    if (coords.length === 1) {
-	        coords = coords[0];
-	    } else {
-	        type = 'Multi' + type;
-	    }
-
-	    var result = {
-	        type: "Feature",
-	        geometry: {
-	            type: type,
-	            coordinates: coords
-	        },
-	        properties: this.properties
-	    };
-
-	    if ('id' in this) {
-	        result.id = this.id;
-	    }
 
-	    return result;
-	};
-
-	// classifies an array of rings into polygons with outer rings and holes
+	        if (score < epsilon) {
+	          break;
+	        }
+	      }
 
-	function classifyRings(rings) {
-	    var len = rings.length;
+	      var bestCoords = bestPoints.map(function (p) {
+	        return p.coord;
+	      });
+	      if (isClosed) bestCoords.push(bestCoords[0]); // move the nodes that should move
 
-	    if (len <= 1) { return [rings]; }
+	      for (i = 0; i < bestPoints.length; i++) {
+	        point = bestPoints[i];
 
-	    var polygons = [],
-	        polygon,
-	        ccw;
+	        if (!geoVecEqual(originalPoints[i].coord, point.coord)) {
+	          node = graph.entity(point.id);
+	          loc = projection.invert(point.coord);
+	          graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+	        }
+	      } // move the nodes along straight segments
 
-	    for (var i = 0; i < len; i++) {
-	        var area = signedArea$1(rings[i]);
-	        if (area === 0) { continue; }
 
-	        if (ccw === undefined) { ccw = area < 0; }
+	      for (i = 0; i < straights.length; i++) {
+	        point = straights[i];
+	        if (nodeCount[point.id] > 1) continue; // skip self-intersections
 
-	        if (ccw === area < 0) {
-	            if (polygon) { polygons.push(polygon); }
-	            polygon = [rings[i]];
+	        node = graph.entity(point.id);
 
+	        if (t === 1 && graph.parentWays(node).length === 1 && graph.parentRelations(node).length === 0 && !node.hasInterestingTags()) {
+	          // remove uninteresting points..
+	          graph = actionDeleteNode(node.id)(graph);
 	        } else {
-	            polygon.push(rings[i]);
+	          // move interesting points to the nearest edge..
+	          var choice = geoVecProject(point.coord, bestCoords);
+
+	          if (choice) {
+	            loc = projection.invert(choice.target);
+	            graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+	          }
 	        }
+	      }
 	    }
-	    if (polygon) { polygons.push(polygon); }
 
-	    return polygons;
-	}
+	    return graph;
 
-	function signedArea$1(ring) {
-	    var sum = 0;
-	    for (var i = 0, len = ring.length, j = len - 1, p1, p2; i < len; j = i++) {
-	        p1 = ring[i];
-	        p2 = ring[j];
-	        sum += (p2.x - p1.x) * (p1.y + p2.y);
+	    function clonePoints(array) {
+	      return array.map(function (p) {
+	        return {
+	          id: p.id,
+	          coord: [p.coord[0], p.coord[1]]
+	        };
+	      });
 	    }
-	    return sum;
-	}
-
-	var vectortilelayer = VectorTileLayer;
-
-	function VectorTileLayer(pbf, end) {
-	    // Public
-	    this.version = 1;
-	    this.name = null;
-	    this.extent = 4096;
-	    this.length = 0;
 
-	    // Private
-	    this._pbf = pbf;
-	    this._keys = [];
-	    this._values = [];
-	    this._features = [];
-
-	    pbf.readFields(readLayer, this, end);
-
-	    this.length = this._features.length;
-	}
+	    function calcMotion(point, i, array) {
+	      // don't try to move the endpoints of a non-closed way.
+	      if (!isClosed && (i === 0 || i === array.length - 1)) return [0, 0]; // don't try to move a node that appears more than once (self intersection)
+
+	      if (nodeCount[array[i].id] > 1) return [0, 0];
+	      var a = array[(i - 1 + array.length) % array.length].coord;
+	      var origin = point.coord;
+	      var b = array[(i + 1) % array.length].coord;
+	      var p = geoVecSubtract(a, origin);
+	      var q = geoVecSubtract(b, origin);
+	      var scale = 2 * Math.min(geoVecLength(p), geoVecLength(q));
+	      p = geoVecNormalize(p);
+	      q = geoVecNormalize(q);
+	      var dotp = p[0] * q[0] + p[1] * q[1];
+	      var val = Math.abs(dotp);
+
+	      if (val < lowerThreshold) {
+	        // nearly orthogonal
+	        corner.i = i;
+	        corner.dotp = val;
+	        var vec = geoVecNormalize(geoVecAdd(p, q));
+	        return geoVecScale(vec, 0.1 * dotp * scale);
+	      }
 
-	function readLayer(tag, layer, pbf) {
-	    if (tag === 15) { layer.version = pbf.readVarint(); }
-	    else if (tag === 1) { layer.name = pbf.readString(); }
-	    else if (tag === 5) { layer.extent = pbf.readVarint(); }
-	    else if (tag === 2) { layer._features.push(pbf.pos); }
-	    else if (tag === 3) { layer._keys.push(pbf.readString()); }
-	    else if (tag === 4) { layer._values.push(readValueMessage(pbf)); }
-	}
+	      return [0, 0]; // do nothing
+	    }
+	  }; // if we are only orthogonalizing one vertex,
+	  // get that vertex and the previous and next
 
-	function readValueMessage(pbf) {
-	    var value = null,
-	        end = pbf.readVarint() + pbf.pos;
 
-	    while (pbf.pos < end) {
-	        var tag = pbf.readVarint() >> 3;
+	  function nodeSubset(nodes, vertexID, isClosed) {
+	    var first = isClosed ? 0 : 1;
+	    var last = isClosed ? nodes.length : nodes.length - 1;
 
-	        value = tag === 1 ? pbf.readString() :
-	            tag === 2 ? pbf.readFloat() :
-	            tag === 3 ? pbf.readDouble() :
-	            tag === 4 ? pbf.readVarint64() :
-	            tag === 5 ? pbf.readVarint() :
-	            tag === 6 ? pbf.readSVarint() :
-	            tag === 7 ? pbf.readBoolean() : null;
+	    for (var i = first; i < last; i++) {
+	      if (nodes[i].id === vertexID) {
+	        return [nodes[(i - 1 + nodes.length) % nodes.length], nodes[i], nodes[(i + 1) % nodes.length]];
+	      }
 	    }
 
-	    return value;
-	}
-
-	// return feature `i` from this layer as a `VectorTileFeature`
-	VectorTileLayer.prototype.feature = function(i) {
-	    if (i < 0 || i >= this._features.length) { throw new Error('feature index out of bounds'); }
-
-	    this._pbf.pos = this._features[i];
+	    return [];
+	  }
 
-	    var end = this._pbf.readVarint() + this._pbf.pos;
-	    return new vectortilefeature(this._pbf, end, this.extent, this._keys, this._values);
-	};
+	  action.disabled = function (graph) {
+	    var way = graph.entity(wayID);
+	    way = way.removeNode(''); // sanity check - remove any consecutive duplicates
 
-	var vectortile = VectorTile;
+	    graph = graph.replace(way);
+	    var isClosed = way.isClosed();
+	    var nodes = graph.childNodes(way).slice(); // shallow copy
 
-	function VectorTile(pbf, end) {
-	    this.layers = pbf.readFields(readTile, {}, end);
-	}
+	    if (isClosed) nodes.pop();
+	    var allowStraightAngles = false;
 
-	function readTile(tag, layers, pbf) {
-	    if (tag === 3) {
-	        var layer = new vectortilelayer(pbf, pbf.readVarint() + pbf.pos);
-	        if (layer.length) { layers[layer.name] = layer; }
+	    if (vertexID !== undefined) {
+	      allowStraightAngles = true;
+	      nodes = nodeSubset(nodes, vertexID, isClosed);
+	      if (nodes.length !== 3) return 'end_vertex';
 	    }
-	}
 
-	var VectorTile$1 = vectortile;
-	var VectorTileFeature$1 = vectortilefeature;
-	var VectorTileLayer$1 = vectortilelayer;
-
-	var vectorTile = {
-		VectorTile: VectorTile$1,
-		VectorTileFeature: VectorTileFeature$1,
-		VectorTileLayer: VectorTileLayer$1
-	};
-
-	var tiler$7 = utilTiler().tileSize(512).margin(1);
-	var dispatch$8 = dispatch('loadedData');
-	var _vtCache;
+	    var coords = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);
 
+	    if (score === null) {
+	      return 'not_squarish';
+	    } else if (score === 0) {
+	      return 'square_enough';
+	    } else {
+	      return false;
+	    }
+	  };
 
-	function abortRequest$7(controller) {
-	    controller.abort();
+	  action.transitionable = true;
+	  return action;
 	}
 
+	//
+	// `turn` must be an `osmTurn` object
+	// see osm/intersection.js, pathToTurn()
+	//
+	// This specifies a restriction of type `restriction` when traveling from
+	// `turn.from.way` toward `turn.to.way` via `turn.via.node` OR `turn.via.ways`.
+	// (The action does not check that these entities form a valid intersection.)
+	//
+	// From, to, and via ways should be split before calling this action.
+	// (old versions of the code would split the ways here, but we no longer do it)
+	//
+	// For testing convenience, accepts a restrictionID to assign to the new
+	// relation. Normally, this will be undefined and the relation will
+	// automatically be assigned a new ID.
+	//
 
-	function vtToGeoJSON(data, tile, mergeCache) {
-	    var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
-	    var layers = Object.keys(vectorTile$1.layers);
-	    if (!Array.isArray(layers)) { layers = [layers]; }
-
-	    var features = [];
-	    layers.forEach(function(layerID) {
-	        var layer = vectorTile$1.layers[layerID];
-	        if (layer) {
-	            for (var i = 0; i < layer.length; i++) {
-	                var feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
-	                var geometry = feature.geometry;
-
-	                // Treat all Polygons as MultiPolygons
-	                if (geometry.type === 'Polygon') {
-	                    geometry.type = 'MultiPolygon';
-	                    geometry.coordinates = [geometry.coordinates];
-	                }
+	function actionRestrictTurn(turn, restrictionType, restrictionID) {
+	  return function (graph) {
+	    var fromWay = graph.entity(turn.from.way);
+	    var toWay = graph.entity(turn.to.way);
+	    var viaNode = turn.via.node && graph.entity(turn.via.node);
+	    var viaWays = turn.via.ways && turn.via.ways.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    var members = [];
+	    members.push({
+	      id: fromWay.id,
+	      type: 'way',
+	      role: 'from'
+	    });
 
-	                // Clip to tile bounds
-	                if (geometry.type === 'MultiPolygon') {
-	                    var isClipped = false;
-	                    var featureClip = bboxClip_1(feature, tile.extent.rectangle());
-	                    if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
-	                        // feature = featureClip;
-	                        isClipped = true;
-	                    }
-	                    if (!feature.geometry.coordinates.length) { continue; }   // not actually on this tile
-	                    if (!feature.geometry.coordinates[0].length) { continue; }   // not actually on this tile
-	                }
+	    if (viaNode) {
+	      members.push({
+	        id: viaNode.id,
+	        type: 'node',
+	        role: 'via'
+	      });
+	    } else if (viaWays) {
+	      viaWays.forEach(function (viaWay) {
+	        members.push({
+	          id: viaWay.id,
+	          type: 'way',
+	          role: 'via'
+	        });
+	      });
+	    }
 
-	                // Generate some unique IDs and add some metadata
-	                var featurehash = utilHashcode(fastJsonStableStringify(feature));
-	                var propertyhash = utilHashcode(fastJsonStableStringify(feature.properties || {}));
-	                feature.__layerID__ = layerID.replace(/[^_a-zA-Z0-9\-]/g, '_');
-	                feature.__featurehash__ = featurehash;
-	                feature.__propertyhash__ = propertyhash;
-	                features.push(feature);
-
-	                // Clipped Polygons at same zoom with identical properties can get merged
-	                if (isClipped && geometry.type === 'MultiPolygon') {
-	                    var merged = mergeCache[propertyhash];
-	                    if (merged && merged.length) {
-	                        var other = merged[0];
-	                        var coords = union(
-	                            feature.geometry.coordinates,
-	                            other.geometry.coordinates
-	                        );
-
-	                        if (!coords || !coords.length) {
-	                            continue;  // something failed in martinez union
-	                        }
-
-	                        merged.push(feature);
-	                        for (var j = 0; j < merged.length; j++) {      // all these features get...
-	                            merged[j].geometry.coordinates = coords;   // same coords
-	                            merged[j].__featurehash__ = featurehash;   // same hash, so deduplication works
-	                        }
-	                    } else {
-	                        mergeCache[propertyhash] = [feature];
-	                    }
-	                }
-	            }
-	        }
+	    members.push({
+	      id: toWay.id,
+	      type: 'way',
+	      role: 'to'
 	    });
-
-	    return features;
+	    return graph.replace(osmRelation({
+	      id: restrictionID,
+	      tags: {
+	        type: 'restriction',
+	        restriction: restrictionType
+	      },
+	      members: members
+	    }));
+	  };
 	}
 
-
-	function loadTile(source, tile) {
-	    if (source.loaded[tile.id] || source.inflight[tile.id]) { return; }
-
-	    var url = source.template
-	        .replace('{x}', tile.xyz[0])
-	        .replace('{y}', tile.xyz[1])
-	        // TMS-flipped y coordinate
-	        .replace(/\{[t-]y\}/, Math.pow(2, tile.xyz[2]) - tile.xyz[1] - 1)
-	        .replace(/\{z(oom)?\}/, tile.xyz[2])
-	        .replace(/\{switch:([^}]+)\}/, function(s, r) {
-	            var subdomains = r.split(',');
-	            return subdomains[(tile.xyz[0] + tile.xyz[1]) % subdomains.length];
+	function actionRevert(id) {
+	  var action = function action(graph) {
+	    var entity = graph.hasEntity(id),
+	        base = graph.base().entities[id];
+
+	    if (entity && !base) {
+	      // entity will be removed..
+	      if (entity.type === 'node') {
+	        graph.parentWays(entity).forEach(function (parent) {
+	          parent = parent.removeNode(id);
+	          graph = graph.replace(parent);
+
+	          if (parent.isDegenerate()) {
+	            graph = actionDeleteWay(parent.id)(graph);
+	          }
 	        });
+	      }
 
+	      graph.parentRelations(entity).forEach(function (parent) {
+	        parent = parent.removeMembersWithID(id);
+	        graph = graph.replace(parent);
 
-	    var controller = new AbortController();
-	    source.inflight[tile.id] = controller;
-
-	    fetch(url, { signal: controller.signal })
-	        .then(function(response) {
-	            if (!response.ok) {
-	                throw new Error(response.status + ' ' + response.statusText);
-	            }
-	            source.loaded[tile.id] = [];
-	            delete source.inflight[tile.id];
-	            return response.arrayBuffer();
-	        })
-	        .then(function(data) {
-	            if (!data) {
-	                throw new Error('No Data');
-	            }
+	        if (parent.isDegenerate()) {
+	          graph = actionDeleteRelation(parent.id)(graph);
+	        }
+	      });
+	    }
 
-	            var z = tile.xyz[2];
-	            if (!source.canMerge[z]) {
-	                source.canMerge[z] = {};  // initialize mergeCache
-	            }
+	    return graph.revert(id);
+	  };
 
-	            source.loaded[tile.id] = vtToGeoJSON(data, tile, source.canMerge[z]);
-	            dispatch$8.call('loadedData');
-	        })
-	        .catch(function() {
-	            source.loaded[tile.id] = [];
-	            delete source.inflight[tile.id];
-	        });
+	  return action;
 	}
 
+	function actionRotate(rotateIds, pivot, angle, projection) {
+	  var action = function action(graph) {
+	    return graph.update(function (graph) {
+	      utilGetAllNodes(rotateIds, graph).forEach(function (node) {
+	        var point = geoRotate([projection(node.loc)], angle, pivot)[0];
+	        graph = graph.replace(node.move(projection.invert(point)));
+	      });
+	    });
+	  };
 
-	var serviceVectorTile = {
-
-	    init: function() {
-	        if (!_vtCache) {
-	            this.reset();
-	        }
-
-	        this.event = utilRebind(this, dispatch$8, 'on');
-	    },
-
+	  return action;
+	}
 
-	    reset: function() {
-	        for (var sourceID in _vtCache) {
-	            var source = _vtCache[sourceID];
-	            if (source && source.inflight) {
-	                Object.values(source.inflight).forEach(abortRequest$7);
-	            }
-	        }
+	function actionScale(ids, pivotLoc, scaleFactor, projection) {
+	  return function (graph) {
+	    return graph.update(function (graph) {
+	      var point, radial;
+	      utilGetAllNodes(ids, graph).forEach(function (node) {
+	        point = projection(node.loc);
+	        radial = [point[0] - pivotLoc[0], point[1] - pivotLoc[1]];
+	        point = [pivotLoc[0] + scaleFactor * radial[0], pivotLoc[1] + scaleFactor * radial[1]];
+	        graph = graph.replace(node.move(projection.invert(point)));
+	      });
+	    });
+	  };
+	}
 
-	        _vtCache = {};
-	    },
+	/* Align nodes along their common axis */
 
+	function actionStraightenNodes(nodeIDs, projection) {
+	  function positionAlongWay(a, o, b) {
+	    return geoVecDot(a, b, o) / geoVecDot(b, b, o);
+	  } // returns the endpoints of the long axis of symmetry of the `points` bounding rect
 
-	    addSource: function(sourceID, template) {
-	        _vtCache[sourceID] = { template: template, inflight: {}, loaded: {}, canMerge: {} };
-	        return _vtCache[sourceID];
-	    },
 
+	  function getEndpoints(points) {
+	    var ssr = geoGetSmallestSurroundingRectangle(points); // Choose line pq = axis of symmetry.
+	    // The shape's surrounding rectangle has 2 axes of symmetry.
+	    // Snap points to the long axis
 
-	    data: function(sourceID, projection) {
-	        var source = _vtCache[sourceID];
-	        if (!source) { return []; }
+	    var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
+	    var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
+	    var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
+	    var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
+	    var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);
 
-	        var tiles = tiler$7.getTiles(projection);
-	        var seen = {};
-	        var results = [];
+	    if (isLong) {
+	      return [p1, q1];
+	    }
 
-	        for (var i = 0; i < tiles.length; i++) {
-	            var features = source.loaded[tiles[i].id];
-	            if (!features || !features.length) { continue; }
+	    return [p2, q2];
+	  }
 
-	            for (var j = 0; j < features.length; j++) {
-	                var feature = features[j];
-	                var hash = feature.__featurehash__;
-	                if (seen[hash]) { continue; }
-	                seen[hash] = true;
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var nodes = nodeIDs.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var endpoints = getEndpoints(points);
+	    var startPoint = endpoints[0];
+	    var endPoint = endpoints[1]; // Move points onto the line connecting the endpoints
 
-	                // return a shallow copy, because the hash may change
-	                // later if this feature gets merged with another
-	                results.push(Object.assign({}, feature));  // shallow copy
-	            }
-	        }
+	    for (var i = 0; i < points.length; i++) {
+	      var node = nodes[i];
+	      var point = points[i];
+	      var u = positionAlongWay(point, startPoint, endPoint);
+	      var point2 = geoVecInterp(startPoint, endPoint, u);
+	      var loc2 = projection.invert(point2);
+	      graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
+	    }
 
-	        return results;
-	    },
+	    return graph;
+	  };
 
+	  action.disabled = function (graph) {
+	    var nodes = nodeIDs.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var endpoints = getEndpoints(points);
+	    var startPoint = endpoints[0];
+	    var endPoint = endpoints[1];
+	    var maxDistance = 0;
 
-	    loadTiles: function(sourceID, template, projection) {
-	        var source = _vtCache[sourceID];
-	        if (!source) {
-	            source = this.addSource(sourceID, template);
-	        }
+	    for (var i = 0; i < points.length; i++) {
+	      var point = points[i];
+	      var u = positionAlongWay(point, startPoint, endPoint);
+	      var p = geoVecInterp(startPoint, endPoint, u);
+	      var dist = geoVecLength(p, point);
 
-	        var tiles = tiler$7.getTiles(projection);
+	      if (!isNaN(dist) && dist > maxDistance) {
+	        maxDistance = dist;
+	      }
+	    }
 
-	        // abort inflight requests that are no longer needed
-	        Object.keys(source.inflight).forEach(function(k) {
-	            var wanted = tiles.find(function(tile) { return k === tile.id; });
-	            if (!wanted) {
-	                abortRequest$7(source.inflight[k]);
-	                delete source.inflight[k];
-	            }
-	        });
+	    if (maxDistance < 0.0001) {
+	      return 'straight_enough';
+	    }
+	  };
 
-	        tiles.forEach(function(tile) {
-	            loadTile(source, tile);
-	        });
-	    },
+	  action.transitionable = true;
+	  return action;
+	}
 
+	/*
+	 * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
+	 */
 
-	    cache: function() {
-	        return _vtCache;
-	    }
+	function actionStraightenWay(selectedIDs, projection) {
+	  function positionAlongWay(a, o, b) {
+	    return geoVecDot(a, b, o) / geoVecDot(b, b, o);
+	  } // Return all selected ways as a continuous, ordered array of nodes
 
-	};
 
-	var apibase$5 = 'https://www.wikidata.org/w/api.php?';
-	var _wikidataCache = {};
+	  function allNodes(graph) {
+	    var nodes = [];
+	    var startNodes = [];
+	    var endNodes = [];
+	    var remainingWays = [];
+	    var selectedWays = selectedIDs.filter(function (w) {
+	      return graph.entity(w).type === 'way';
+	    });
+	    var selectedNodes = selectedIDs.filter(function (n) {
+	      return graph.entity(n).type === 'node';
+	    });
 
+	    for (var i = 0; i < selectedWays.length; i++) {
+	      var way = graph.entity(selectedWays[i]);
+	      nodes = way.nodes.slice(0);
+	      remainingWays.push(nodes);
+	      startNodes.push(nodes[0]);
+	      endNodes.push(nodes[nodes.length - 1]);
+	    } // Remove duplicate end/startNodes (duplicate nodes cannot be at the line end,
+	    //   and need to be removed so currNode difference calculation below works)
+	    // i.e. ["n-1", "n-1", "n-2"] => ["n-2"]
 
-	var serviceWikidata = {
 
-	    init: function() {},
+	    startNodes = startNodes.filter(function (n) {
+	      return startNodes.indexOf(n) === startNodes.lastIndexOf(n);
+	    });
+	    endNodes = endNodes.filter(function (n) {
+	      return endNodes.indexOf(n) === endNodes.lastIndexOf(n);
+	    }); // Choose the initial endpoint to start from
 
-	    reset: function() {
-	        _wikidataCache = {};
-	    },
+	    var currNode = utilArrayDifference(startNodes, endNodes).concat(utilArrayDifference(endNodes, startNodes))[0];
+	    var nextWay = [];
+	    nodes = []; // Create nested function outside of loop to avoid "function in loop" lint error
 
+	    var getNextWay = function getNextWay(currNode, remainingWays) {
+	      return remainingWays.filter(function (way) {
+	        return way[0] === currNode || way[way.length - 1] === currNode;
+	      })[0];
+	    }; // Add nodes to end of nodes array, until all ways are added
 
-	    // Search for Wikidata items matching the query
-	    itemsForSearchQuery: function(query, callback) {
-	        if (!query) {
-	            if (callback) { callback('No query', {}); }
-	            return;
-	        }
 
-	        var lang = this.languagesToQuery()[0];
-
-	        var url = apibase$5 + utilQsString({
-	            action: 'wbsearchentities',
-	            format: 'json',
-	            formatversion: 2,
-	            search: query,
-	            type: 'item',
-	            // the language to search
-	            language: lang,
-	            // the langauge for the label and description in the result
-	            uselang: lang,
-	            limit: 10,
-	            origin: '*'
-	        });
+	    while (remainingWays.length) {
+	      nextWay = getNextWay(currNode, remainingWays);
+	      remainingWays = utilArrayDifference(remainingWays, [nextWay]);
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                }
-	                if (callback) { callback(null, result.search || {}); }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err.message, {}); }
-	            });
-	    },
+	      if (nextWay[0] !== currNode) {
+	        nextWay.reverse();
+	      }
 
+	      nodes = nodes.concat(nextWay);
+	      currNode = nodes[nodes.length - 1];
+	    } // If user selected 2 nodes to straighten between, then slice nodes array to those nodes
 
-	    // Given a Wikipedia language and article title,
-	    // return an array of corresponding Wikidata entities.
-	    itemsByTitle: function(lang, title, callback) {
-	        if (!title) {
-	            if (callback) { callback('No title', {}); }
-	            return;
-	        }
 
-	        lang = lang || 'en';
-	        var url = apibase$5 + utilQsString({
-	            action: 'wbgetentities',
-	            format: 'json',
-	            formatversion: 2,
-	            sites: lang.replace(/-/g, '_') + 'wiki',
-	            titles: title,
-	            languages: 'en', // shrink response by filtering to one language
-	            origin: '*'
-	        });
+	    if (selectedNodes.length === 2) {
+	      var startNodeIdx = nodes.indexOf(selectedNodes[0]);
+	      var endNodeIdx = nodes.indexOf(selectedNodes[1]);
+	      var sortedStartEnd = [startNodeIdx, endNodeIdx];
+	      sortedStartEnd.sort(function (a, b) {
+	        return a - b;
+	      });
+	      nodes = nodes.slice(sortedStartEnd[0], sortedStartEnd[1] + 1);
+	    }
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                }
-	                if (callback) { callback(null, result.entities || {}); }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err.message, {}); }
-	            });
-	    },
+	    return nodes.map(function (n) {
+	      return graph.entity(n);
+	    });
+	  }
 
+	  function shouldKeepNode(node, graph) {
+	    return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+	  }
 
-	    languagesToQuery: function() {
-	        var localeCode = _mainLocalizer.localeCode().toLowerCase();
-	        // HACK: en-us isn't a wikidata language. We should really be filtering by
-	        // the languages known to be supported by wikidata.
-	        if (localeCode === 'en-us') { localeCode = 'en'; }
-	        return utilArrayUniq([
-	            localeCode,
-	            _mainLocalizer.languageCode().toLowerCase(),
-	            'en'
-	        ]);
-	    },
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var nodes = allNodes(graph);
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var startPoint = points[0];
+	    var endPoint = points[points.length - 1];
+	    var toDelete = [];
+	    var i;
 
+	    for (i = 1; i < points.length - 1; i++) {
+	      var node = nodes[i];
+	      var point = points[i];
 
-	    entityByQID: function(qid, callback) {
-	        if (!qid) {
-	            callback('No qid', {});
-	            return;
-	        }
-	        if (_wikidataCache[qid]) {
-	            if (callback) { callback(null, _wikidataCache[qid]); }
-	            return;
+	      if (t < 1 || shouldKeepNode(node, graph)) {
+	        var u = positionAlongWay(point, startPoint, endPoint);
+	        var p = geoVecInterp(startPoint, endPoint, u);
+	        var loc2 = projection.invert(p);
+	        graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
+	      } else {
+	        // safe to delete
+	        if (toDelete.indexOf(node) === -1) {
+	          toDelete.push(node);
 	        }
+	      }
+	    }
 
-	        var langs = this.languagesToQuery();
-	        var url = apibase$5 + utilQsString({
-	            action: 'wbgetentities',
-	            format: 'json',
-	            formatversion: 2,
-	            ids: qid,
-	            props: 'labels|descriptions|claims|sitelinks',
-	            sitefilter: langs.map(function(d) { return d + 'wiki'; }).join('|'),
-	            languages: langs.join('|'),
-	            languagefallback: 1,
-	            origin: '*'
-	        });
+	    for (i = 0; i < toDelete.length; i++) {
+	      graph = actionDeleteNode(toDelete[i].id)(graph);
+	    }
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                }
-	                if (callback) { callback(null, result.entities[qid] || {}); }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err.message, {}); }
-	            });
-	    },
+	    return graph;
+	  };
 
+	  action.disabled = function (graph) {
+	    // check way isn't too bendy
+	    var nodes = allNodes(graph);
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var startPoint = points[0];
+	    var endPoint = points[points.length - 1];
+	    var threshold = 0.2 * geoVecLength(startPoint, endPoint);
+	    var i;
 
-	    // Pass `params` object of the form:
-	    // {
-	    //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
-	    // }
-	    //
-	    // Get an result object used to display tag documentation
-	    // {
-	    //   title:        'string',
-	    //   description:  'string',
-	    //   editURL:      'string',
-	    //   imageURL:     'string',
-	    //   wiki:         { title: 'string', text: 'string', url: 'string' }
-	    // }
-	    //
-	    getDocs: function(params, callback) {
-	        var langs = this.languagesToQuery();
-	        this.entityByQID(params.qid, function(err, entity) {
-	            if (err || !entity) {
-	                callback(err || 'No entity');
-	                return;
-	            }
+	    if (threshold === 0) {
+	      return 'too_bendy';
+	    }
 
-	            var i;
-	            var description;
-	            if (entity.descriptions && Object.keys(entity.descriptions).length > 0) {
-	                description = entity.descriptions[Object.keys(entity.descriptions)[0]].value;
-	            }
+	    var maxDistance = 0;
 
-	            // prepare result
-	            var result = {
-	                title: entity.id,
-	                description: description,
-	                editURL: 'https://www.wikidata.org/wiki/' + entity.id
-	            };
+	    for (i = 1; i < points.length - 1; i++) {
+	      var point = points[i];
+	      var u = positionAlongWay(point, startPoint, endPoint);
+	      var p = geoVecInterp(startPoint, endPoint, u);
+	      var dist = geoVecLength(p, point); // to bendy if point is off by 20% of total start/end distance in projected space
 
-	            // add image
-	            if (entity.claims) {
-	                var imageroot = 'https://commons.wikimedia.org/w/index.php';
-	                var props = ['P154','P18'];  // logo image, image
-	                var prop, image;
-	                for (i = 0; i < props.length; i++) {
-	                    prop = entity.claims[props[i]];
-	                    if (prop && Object.keys(prop).length > 0) {
-	                        image = prop[Object.keys(prop)[0]].mainsnak.datavalue.value;
-	                        if (image) {
-	                            result.imageURL = imageroot + '?' + utilQsString({
-	                                title: 'Special:Redirect/file/' + image,
-	                                width: 400
-	                            });
-	                            break;
-	                        }
-	                    }
-	                }
-	            }
+	      if (isNaN(dist) || dist > threshold) {
+	        return 'too_bendy';
+	      } else if (dist > maxDistance) {
+	        maxDistance = dist;
+	      }
+	    }
 
-	            if (entity.sitelinks) {
-	                var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en';
-
-	                // must be one of these that we requested..
-	                for (i = 0; i < langs.length; i++) {   // check each, in order of preference
-	                    var w = langs[i] + 'wiki';
-	                    if (entity.sitelinks[w]) {
-	                        var title = entity.sitelinks[w].title;
-	                        var tKey = 'inspector.wiki_reference';
-	                        if (!englishLocale && langs[i] === 'en') {   // user's locale isn't English but
-	                            tKey = 'inspector.wiki_en_reference';    // we are sending them to enwiki anyway..
-	                        }
-
-	                        result.wiki = {
-	                            title: title,
-	                            text: tKey,
-	                            url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
-	                        };
-	                        break;
-	                    }
-	                }
-	            }
+	    var keepingAllNodes = nodes.every(function (node, i) {
+	      return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
+	    });
 
-	            callback(null, result);
-	        });
+	    if (maxDistance < 0.0001 && // Allow straightening even if already straight in order to remove extraneous nodes
+	    keepingAllNodes) {
+	      return 'straight_enough';
 	    }
+	  };
 
-	};
+	  action.transitionable = true;
+	  return action;
+	}
 
-	var endpoint = 'https://en.wikipedia.org/w/api.php?';
+	//
+	// `turn` must be an `osmTurn` object with a `restrictionID` property.
+	// see osm/intersection.js, pathToTurn()
+	//
 
-	var serviceWikipedia = {
+	function actionUnrestrictTurn(turn) {
+	  return function (graph) {
+	    return actionDeleteRelation(turn.restrictionID)(graph);
+	  };
+	}
 
-	    init: function() {},
-	    reset: function() {},
+	/* Reflect the given area around its axis of symmetry */
 
+	function actionReflect(reflectIds, projection) {
+	  var _useLongAxis = true;
+
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var nodes = utilGetAllNodes(reflectIds, graph);
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var ssr = geoGetSmallestSurroundingRectangle(points); // Choose line pq = axis of symmetry.
+	    // The shape's surrounding rectangle has 2 axes of symmetry.
+	    // Reflect across the longer axis by default.
+
+	    var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
+	    var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
+	    var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
+	    var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
+	    var p, q;
+	    var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);
+
+	    if (_useLongAxis && isLong || !_useLongAxis && !isLong) {
+	      p = p1;
+	      q = q1;
+	    } else {
+	      p = p2;
+	      q = q2;
+	    } // reflect c across pq
+	    // http://math.stackexchange.com/questions/65503/point-reflection-over-a-line
 
-	    search: function(lang, query, callback) {
-	        if (!query) {
-	            if (callback) { callback('No Query', []); }
-	            return;
-	        }
 
-	        lang = lang || 'en';
-	        var url = endpoint.replace('en', lang) +
-	            utilQsString({
-	                action: 'query',
-	                list: 'search',
-	                srlimit: '10',
-	                srinfo: 'suggestion',
-	                format: 'json',
-	                origin: '*',
-	                srsearch: query
-	            });
+	    var dx = q[0] - p[0];
+	    var dy = q[1] - p[1];
+	    var a = (dx * dx - dy * dy) / (dx * dx + dy * dy);
+	    var b = 2 * dx * dy / (dx * dx + dy * dy);
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                } else if (!result || !result.query || !result.query.search) {
-	                    throw new Error('No Results');
-	                }
-	                if (callback) {
-	                    var titles = result.query.search.map(function(d) { return d.title; });
-	                    callback(null, titles);
-	                }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err, []); }
-	            });
-	    },
+	    for (var i = 0; i < nodes.length; i++) {
+	      var node = nodes[i];
+	      var c = projection(node.loc);
+	      var c2 = [a * (c[0] - p[0]) + b * (c[1] - p[1]) + p[0], b * (c[0] - p[0]) - a * (c[1] - p[1]) + p[1]];
+	      var loc2 = projection.invert(c2);
+	      node = node.move(geoVecInterp(node.loc, loc2, t));
+	      graph = graph.replace(node);
+	    }
 
+	    return graph;
+	  };
 
-	    suggestions: function(lang, query, callback) {
-	        if (!query) {
-	            if (callback) { callback('', []); }
-	            return;
-	        }
+	  action.useLongAxis = function (val) {
+	    if (!arguments.length) return _useLongAxis;
+	    _useLongAxis = val;
+	    return action;
+	  };
 
-	        lang = lang || 'en';
-	        var url = endpoint.replace('en', lang) +
-	            utilQsString({
-	                action: 'opensearch',
-	                namespace: 0,
-	                suggest: '',
-	                format: 'json',
-	                origin: '*',
-	                search: query
-	            });
+	  action.transitionable = true;
+	  return action;
+	}
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                } else if (!result || result.length < 2) {
-	                    throw new Error('No Results');
-	                }
-	                if (callback) { callback(null, result[1] || []); }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err.message, []); }
-	            });
-	    },
+	function actionUpgradeTags(entityId, oldTags, replaceTags) {
+	  return function (graph) {
+	    var entity = graph.entity(entityId);
+	    var tags = Object.assign({}, entity.tags); // shallow copy
 
+	    var transferValue;
+	    var semiIndex;
 
-	    translations: function(lang, title, callback) {
-	        if (!title) {
-	            if (callback) { callback('No Title'); }
-	            return;
-	        }
+	    for (var oldTagKey in oldTags) {
+	      if (!(oldTagKey in tags)) continue; // wildcard match
 
-	        var url = endpoint.replace('en', lang) +
-	            utilQsString({
-	                action: 'query',
-	                prop: 'langlinks',
-	                format: 'json',
-	                origin: '*',
-	                lllimit: 500,
-	                titles: title
-	            });
+	      if (oldTags[oldTagKey] === '*') {
+	        // note the value since we might need to transfer it
+	        transferValue = tags[oldTagKey];
+	        delete tags[oldTagKey]; // exact match
+	      } else if (oldTags[oldTagKey] === tags[oldTagKey]) {
+	        delete tags[oldTagKey]; // match is within semicolon-delimited values
+	      } else {
+	        var vals = tags[oldTagKey].split(';').filter(Boolean);
+	        var oldIndex = vals.indexOf(oldTags[oldTagKey]);
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                } else if (!result || !result.query || !result.query.pages) {
-	                    throw new Error('No Results');
-	                }
-	                if (callback) {
-	                    var list = result.query.pages[Object.keys(result.query.pages)[0]];
-	                    var translations = {};
-	                    if (list && list.langlinks) {
-	                        list.langlinks.forEach(function(d) { translations[d.lang] = d['*']; });
-	                    }
-	                    callback(null, translations);
-	                }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err.message); }
-	            });
+	        if (vals.length === 1 || oldIndex === -1) {
+	          delete tags[oldTagKey];
+	        } else {
+	          if (replaceTags && replaceTags[oldTagKey]) {
+	            // replacing a value within a semicolon-delimited value, note the index
+	            semiIndex = oldIndex;
+	          }
+
+	          vals.splice(oldIndex, 1);
+	          tags[oldTagKey] = vals.join(';');
+	        }
+	      }
 	    }
 
-	};
+	    if (replaceTags) {
+	      for (var replaceKey in replaceTags) {
+	        var replaceValue = replaceTags[replaceKey];
 
-	var services = {
-	    geocoder: serviceNominatim,
-	    keepRight: serviceKeepRight,
-	    improveOSM: serviceImproveOSM,
-	    osmose: serviceOsmose,
-	    mapillary: serviceMapillary,
-	    openstreetcam: serviceOpenstreetcam,
-	    osm: serviceOsm,
-	    osmWikibase: serviceOsmWikibase,
-	    maprules: serviceMapRules,
-	    streetside: serviceStreetside,
-	    taginfo: serviceTaginfo,
-	    vectorTile: serviceVectorTile,
-	    wikidata: serviceWikidata,
-	    wikipedia: serviceWikipedia
-	};
+	        if (replaceValue === '*') {
+	          if (tags[replaceKey] && tags[replaceKey] !== 'no') {
+	            // allow any pre-existing value except `no` (troll tag)
+	            continue;
+	          } else {
+	            // otherwise assume `yes` is okay
+	            tags[replaceKey] = 'yes';
+	          }
+	        } else if (replaceValue === '$1') {
+	          tags[replaceKey] = transferValue;
+	        } else {
+	          if (tags[replaceKey] && oldTags[replaceKey] && semiIndex !== undefined) {
+	            // don't override preexisting values
+	            var existingVals = tags[replaceKey].split(';').filter(Boolean);
 
-	function svgIcon(name, svgklass, useklass) {
-	    return function drawIcon(selection) {
-	        selection.selectAll('svg.icon' + (svgklass ? '.' + svgklass.split(' ')[0] : ''))
-	            .data([0])
-	            .enter()
-	            .append('svg')
-	            .attr('class', 'icon ' + (svgklass || ''))
-	            .append('use')
-	            .attr('xlink:href', name)
-	            .attr('class', useklass);
-	    };
+	            if (existingVals.indexOf(replaceValue) === -1) {
+	              existingVals.splice(semiIndex, 0, replaceValue);
+	              tags[replaceKey] = existingVals.join(';');
+	            }
+	          } else {
+	            tags[replaceKey] = replaceValue;
+	          }
+	        }
+	      }
+	    }
+
+	    return graph.replace(entity.update({
+	      tags: tags
+	    }));
+	  };
 	}
 
-	function uiNoteComments() {
-	    var _note;
+	function behaviorEdit(context) {
+	  function behavior() {
+	    context.map().minzoom(context.minEditableZoom());
+	  }
 
+	  behavior.off = function () {
+	    context.map().minzoom(0);
+	  };
 
-	    function noteComments(selection) {
-	        if (_note.isNew()) { return; } // don't draw .comments-container
+	  return behavior;
+	}
 
-	        var comments = selection.selectAll('.comments-container')
-	            .data([0]);
+	/*
+	   The hover behavior adds the `.hover` class on pointerover to all elements to which
+	   the identical datum is bound, and removes it on pointerout.
 
-	        comments = comments.enter()
-	            .append('div')
-	            .attr('class', 'comments-container')
-	            .merge(comments);
+	   The :hover pseudo-class is insufficient for iD's purposes because a datum's visual
+	   representation may consist of several elements scattered throughout the DOM hierarchy.
+	   Only one of these elements can have the :hover pseudo-class, but all of them will
+	   have the .hover class.
+	 */
 
-	        var commentEnter = comments.selectAll('.comment')
-	            .data(_note.comments)
-	            .enter()
-	            .append('div')
-	            .attr('class', 'comment');
+	function behaviorHover(context) {
+	  var dispatch = dispatch$8('hover');
 
-	        commentEnter
-	            .append('div')
-	            .attr('class', function(d) { return 'comment-avatar user-' + d.uid; })
-	            .call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
+	  var _selection = select(null);
 
-	        var mainEnter = commentEnter
-	            .append('div')
-	            .attr('class', 'comment-main');
+	  var _newNodeId = null;
+	  var _initialNodeID = null;
 
-	        var metadataEnter = mainEnter
-	            .append('div')
-	            .attr('class', 'comment-metadata');
+	  var _altDisables;
 
-	        metadataEnter
-	            .append('div')
-	            .attr('class', 'comment-author')
-	            .each(function(d) {
-	                var selection = select(this);
-	                var osm = services.osm;
-	                if (osm && d.user) {
-	                    selection = selection
-	                        .append('a')
-	                        .attr('class', 'comment-author-link')
-	                        .attr('href', osm.userURL(d.user))
-	                        .attr('tabindex', -1)
-	                        .attr('target', '_blank');
-	                }
-	                selection
-	                    .text(function(d) { return d.user || _t('note.anonymous'); });
-	            });
+	  var _ignoreVertex;
 
-	        metadataEnter
-	            .append('div')
-	            .attr('class', 'comment-date')
-	            .text(function(d) {
-	                return _t('note.status.' + d.action, { when: localeDateString(d.date) });
-	            });
+	  var _targets = []; // use pointer events on supported platforms; fallback to mouse events
 
-	        mainEnter
-	            .append('div')
-	            .attr('class', 'comment-text')
-	            .html(function(d) { return d.html; });
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	        comments
-	            .call(replaceAvatars);
-	    }
+	  function keydown(d3_event) {
+	    if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      _selection.selectAll('.hover').classed('hover-suppressed', true).classed('hover', false);
 
+	      _selection.classed('hover-disabled', true);
 
-	    function replaceAvatars(selection) {
-	        var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
-	        var osm = services.osm;
-	        if (showThirdPartyIcons !== 'true' || !osm) { return; }
+	      dispatch.call('hover', this, null);
+	    }
+	  }
 
-	        var uids = {};  // gather uids in the comment thread
-	        _note.comments.forEach(function(d) {
-	            if (d.uid) { uids[d.uid] = true; }
-	        });
+	  function keyup(d3_event) {
+	    if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false).classed('hover', true);
 
-	        Object.keys(uids).forEach(function(uid) {
-	            osm.loadUser(uid, function(err, user) {
-	                if (!user || !user.image_url) { return; }
+	      _selection.classed('hover-disabled', false);
 
-	                selection.selectAll('.comment-avatar.user-' + uid)
-	                    .html('')
-	                    .append('img')
-	                    .attr('class', 'icon comment-avatar-icon')
-	                    .attr('src', user.image_url)
-	                    .attr('alt', user.display_name);
-	            });
-	        });
+	      dispatch.call('hover', this, _targets);
 	    }
+	  }
 
+	  function behavior(selection) {
+	    _selection = selection;
+	    _targets = [];
 
-	    function localeDateString(s) {
-	        if (!s) { return null; }
-	        var options = { day: 'numeric', month: 'short', year: 'numeric' };
-	        s = s.replace(/-/g, '/'); // fix browser-specific Date() issues
-	        var d = new Date(s);
-	        if (isNaN(d.getTime())) { return null; }
-	        return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	    if (_initialNodeID) {
+	      _newNodeId = _initialNodeID;
+	      _initialNodeID = null;
+	    } else {
+	      _newNodeId = null;
 	    }
 
+	    _selection.on(_pointerPrefix + 'over.hover', pointerover).on(_pointerPrefix + 'out.hover', pointerout) // treat pointerdown as pointerover for touch devices
+	    .on(_pointerPrefix + 'down.hover', pointerover);
 
-	    noteComments.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteComments;
-	    };
+	    select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true).on('keydown.hover', keydown).on('keyup.hover', keyup);
 
+	    function eventTarget(d3_event) {
+	      var datum = d3_event.target && d3_event.target.__data__;
+	      if (_typeof(datum) !== 'object') return null;
 
-	    return noteComments;
-	}
+	      if (!(datum instanceof osmEntity) && datum.properties && datum.properties.entity instanceof osmEntity) {
+	        return datum.properties.entity;
+	      }
 
-	function uiNoteHeader() {
-	    var _note;
+	      return datum;
+	    }
 
+	    function pointerover(d3_event) {
+	      // ignore mouse hovers with buttons pressed unless dragging
+	      if (context.mode().id.indexOf('drag') === -1 && (!d3_event.pointerType || d3_event.pointerType === 'mouse') && d3_event.buttons) return;
+	      var target = eventTarget(d3_event);
 
-	    function noteHeader(selection) {
-	        var header = selection.selectAll('.note-header')
-	            .data(
-	                (_note ? [_note] : []),
-	                function(d) { return d.status + d.id; }
-	            );
+	      if (target && _targets.indexOf(target) === -1) {
+	        _targets.push(target);
 
-	        header.exit()
-	            .remove();
+	        updateHover(d3_event, _targets);
+	      }
+	    }
 
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'note-header');
+	    function pointerout(d3_event) {
+	      var target = eventTarget(d3_event);
 
-	        var iconEnter = headerEnter
-	            .append('div')
-	            .attr('class', function(d) { return 'note-header-icon ' + d.status; })
-	            .classed('new', function(d) { return d.id < 0; });
+	      var index = _targets.indexOf(target);
 
-	        iconEnter
-	            .append('div')
-	            .attr('class', 'preset-icon-28')
-	            .call(svgIcon('#iD-icon-note', 'note-fill'));
-
-	        iconEnter.each(function(d) {
-	            var statusIcon = '#iD-icon-' + (d.id < 0 ? 'plus' : (d.status === 'open' ? 'close' : 'apply'));
-	            iconEnter
-	                .append('div')
-	                .attr('class', 'note-icon-annotation')
-	                .call(svgIcon(statusIcon, 'icon-annotation'));
-	        });
+	      if (index !== -1) {
+	        _targets.splice(index);
 
-	        headerEnter
-	            .append('div')
-	            .attr('class', 'note-header-label')
-	            .text(function(d) {
-	                if (_note.isNew()) { return _t('note.new'); }
-	                return _t('note.note') + ' ' + d.id + ' ' +
-	                    (d.status === 'closed' ? _t('note.closed') : '');
-	            });
+	        updateHover(d3_event, _targets);
+	      }
 	    }
 
+	    function allowsVertex(d) {
+	      return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+	    }
 
-	    noteHeader.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteHeader;
-	    };
-
-
-	    return noteHeader;
-	}
-
-	function uiNoteReport() {
-	    var _note;
+	    function modeAllowsHover(target) {
+	      var mode = context.mode();
 
-	    function noteReport(selection) {
-	        var url;
-	        if (services.osm && (_note instanceof osmNote) && (!_note.isNew())) {
-	            url = services.osm.noteReportURL(_note);
-	        }
+	      if (mode.id === 'add-point') {
+	        return mode.preset.matchGeometry('vertex') || target.type !== 'way' && target.geometry(context.graph()) !== 'vertex';
+	      }
 
-	        var link = selection.selectAll('.note-report')
-	            .data(url ? [url] : []);
+	      return true;
+	    }
 
-	        // exit
-	        link.exit()
-	            .remove();
+	    function updateHover(d3_event, targets) {
+	      _selection.selectAll('.hover').classed('hover', false);
 
-	        // enter
-	        var linkEnter = link.enter()
-	            .append('a')
-	            .attr('class', 'note-report')
-	            .attr('target', '_blank')
-	            .attr('href', function(d) { return d; })
-	            .call(svgIcon('#iD-icon-out-link', 'inline'));
+	      _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
 
-	        linkEnter
-	            .append('span')
-	            .text(_t('note.report'));
-	    }
+	      var mode = context.mode();
 
+	      if (!_newNodeId && (mode.id === 'draw-line' || mode.id === 'draw-area')) {
+	        var node = targets.find(function (target) {
+	          return target instanceof osmEntity && target.type === 'node';
+	        });
+	        _newNodeId = node && node.id;
+	      }
 
-	    noteReport.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteReport;
-	    };
+	      targets = targets.filter(function (datum) {
+	        if (datum instanceof osmEntity) {
+	          // If drawing a way, don't hover on a node that was just placed. #3974
+	          return datum.id !== _newNodeId && (datum.type !== 'node' || !_ignoreVertex || allowsVertex(datum)) && modeAllowsHover(datum);
+	        }
 
-	    return noteReport;
-	}
+	        return true;
+	      });
+	      var selector = '';
 
-	function uiViewOnOSM(context) {
-	    var _what;   // an osmEntity or osmNote
+	      for (var i in targets) {
+	        var datum = targets[i]; // What are we hovering over?
 
+	        if (datum.__featurehash__) {
+	          // hovering custom data
+	          selector += ', .data' + datum.__featurehash__;
+	        } else if (datum instanceof QAItem) {
+	          selector += ', .' + datum.service + '.itemId-' + datum.id;
+	        } else if (datum instanceof osmNote) {
+	          selector += ', .note-' + datum.id;
+	        } else if (datum instanceof osmEntity) {
+	          selector += ', .' + datum.id;
 
-	    function viewOnOSM(selection) {
-	        var url;
-	        if (_what instanceof osmEntity) {
-	            url = context.connection().entityURL(_what);
-	        } else if (_what instanceof osmNote) {
-	            url = context.connection().noteURL(_what);
+	          if (datum.type === 'relation') {
+	            for (var j in datum.members) {
+	              selector += ', .' + datum.members[j].id;
+	            }
+	          }
 	        }
+	      }
 
-	        var data = ((!_what || _what.isNew()) ? [] : [_what]);
-	        var link = selection.selectAll('.view-on-osm')
-	            .data(data, function(d) { return d.id; });
+	      var suppressed = _altDisables && d3_event && d3_event.altKey;
 
-	        // exit
-	        link.exit()
-	            .remove();
+	      if (selector.trim().length) {
+	        // remove the first comma
+	        selector = selector.slice(1);
 
-	        // enter
-	        var linkEnter = link.enter()
-	            .append('a')
-	            .attr('class', 'view-on-osm')
-	            .attr('target', '_blank')
-	            .attr('href', url)
-	            .call(svgIcon('#iD-icon-out-link', 'inline'));
+	        _selection.selectAll(selector).classed(suppressed ? 'hover-suppressed' : 'hover', true);
+	      }
 
-	        linkEnter
-	            .append('span')
-	            .text(_t('inspector.view_on_osm'));
+	      dispatch.call('hover', this, !suppressed && targets);
 	    }
+	  }
 
+	  behavior.off = function (selection) {
+	    selection.selectAll('.hover').classed('hover', false);
+	    selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
+	    selection.classed('hover-disabled', false);
+	    selection.on(_pointerPrefix + 'over.hover', null).on(_pointerPrefix + 'out.hover', null).on(_pointerPrefix + 'down.hover', null);
+	    select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', null, true).on('keydown.hover', null).on('keyup.hover', null);
+	  };
 
-	    viewOnOSM.what = function(_) {
-	        if (!arguments.length) { return _what; }
-	        _what = _;
-	        return viewOnOSM;
-	    };
+	  behavior.altDisables = function (val) {
+	    if (!arguments.length) return _altDisables;
+	    _altDisables = val;
+	    return behavior;
+	  };
 
-	    return viewOnOSM;
+	  behavior.ignoreVertex = function (val) {
+	    if (!arguments.length) return _ignoreVertex;
+	    _ignoreVertex = val;
+	    return behavior;
+	  };
+
+	  behavior.initialNodeID = function (nodeId) {
+	    _initialNodeID = nodeId;
+	    return behavior;
+	  };
+
+	  return utilRebind(behavior, dispatch, 'on');
 	}
 
-	function uiNoteEditor(context) {
-	    var dispatch$1 = dispatch('change');
-	    var noteComments = uiNoteComments();
-	    var noteHeader = uiNoteHeader();
+	var _disableSpace = false;
+	var _lastSpace = null;
+	function behaviorDraw(context) {
+	  var dispatch = dispatch$8('move', 'down', 'downcancel', 'click', 'clickWay', 'clickNode', 'undo', 'cancel', 'finish');
+	  var keybinding = utilKeybinding('draw');
 
-	    // var formFields = uiFormFields(context);
+	  var _hover = behaviorHover(context).altDisables(true).ignoreVertex(true).on('hover', context.ui().sidebar.hover);
 
-	    var _note;
-	    var _newNote;
-	    // var _fieldsArr;
+	  var _edit = behaviorEdit(context);
 
+	  var _closeTolerance = 4;
+	  var _tolerance = 12;
+	  var _mouseLeave = false;
+	  var _lastMouse = null;
 
-	    function noteEditor(selection) {
+	  var _lastPointerUpEvent;
 
-	        var header = selection.selectAll('.header')
-	            .data([0]);
+	  var _downPointer; // use pointer events on supported platforms; fallback to mouse events
 
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'header fillL');
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'close')
-	            .on('click', function() {
-	                context.enter(modeBrowse(context));
-	            })
-	            .call(svgIcon('#iD-icon-close'));
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // related code
+	  // - `mode/drag_node.js` `datum()`
 
-	        headerEnter
-	            .append('h3')
-	            .text(_t('note.title'));
 
+	  function datum(d3_event) {
+	    var mode = context.mode();
+	    var isNote = mode && mode.id.indexOf('note') !== -1;
+	    if (d3_event.altKey || isNote) return {};
+	    var element;
 
-	        var body = selection.selectAll('.body')
-	            .data([0]);
+	    if (d3_event.type === 'keydown') {
+	      element = _lastMouse && _lastMouse.target;
+	    } else {
+	      element = d3_event.target;
+	    } // When drawing, snap only to touch targets..
+	    // (this excludes area fills and active drawing elements)
 
-	        body = body.enter()
-	            .append('div')
-	            .attr('class', 'body')
-	            .merge(body);
 
-	        var editor = body.selectAll('.note-editor')
-	            .data([0]);
+	    var d = element.__data__;
+	    return d && d.properties && d.properties.target ? d : {};
+	  }
 
-	        editor.enter()
-	            .append('div')
-	            .attr('class', 'modal-section note-editor')
-	            .merge(editor)
-	            .call(noteHeader.note(_note))
-	            .call(noteComments.note(_note))
-	            .call(noteSaveSection);
+	  function pointerdown(d3_event) {
+	    if (_downPointer) return;
+	    var pointerLocGetter = utilFastMouse(this);
+	    _downPointer = {
+	      id: d3_event.pointerId || 'mouse',
+	      pointerLocGetter: pointerLocGetter,
+	      downTime: +new Date(),
+	      downLoc: pointerLocGetter(d3_event)
+	    };
+	    dispatch.call('down', this, d3_event, datum(d3_event));
+	  }
 
-	        var footer = selection.selectAll('.footer')
-	            .data([0]);
+	  function pointerup(d3_event) {
+	    if (!_downPointer || _downPointer.id !== (d3_event.pointerId || 'mouse')) return;
+	    var downPointer = _downPointer;
+	    _downPointer = null;
+	    _lastPointerUpEvent = d3_event;
+	    if (downPointer.isCancelled) return;
+	    var t2 = +new Date();
+	    var p2 = downPointer.pointerLocGetter(d3_event);
+	    var dist = geoVecLength(downPointer.downLoc, p2);
 
-	        footer.enter()
-	            .append('div')
-	            .attr('class', 'footer')
-	            .merge(footer)
-	            .call(uiViewOnOSM(context).what(_note))
-	            .call(uiNoteReport().note(_note));
+	    if (dist < _closeTolerance || dist < _tolerance && t2 - downPointer.downTime < 500) {
+	      // Prevent a quick second click
+	      select(window).on('click.draw-block', function () {
+	        d3_event.stopPropagation();
+	      }, true);
+	      context.map().dblclickZoomEnable(false);
+	      window.setTimeout(function () {
+	        context.map().dblclickZoomEnable(true);
+	        select(window).on('click.draw-block', null);
+	      }, 500);
+	      click(d3_event, p2);
+	    }
+	  }
 
+	  function pointermove(d3_event) {
+	    if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse') && !_downPointer.isCancelled) {
+	      var p2 = _downPointer.pointerLocGetter(d3_event);
 
-	        // rerender the note editor on any auth change
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.on('change.note-save', function() {
-	                selection.call(noteEditor);
-	            });
-	        }
+	      var dist = geoVecLength(_downPointer.downLoc, p2);
+
+	      if (dist >= _closeTolerance) {
+	        _downPointer.isCancelled = true;
+	        dispatch.call('downcancel', this);
+	      }
 	    }
 
+	    if (d3_event.pointerType && d3_event.pointerType !== 'mouse' || d3_event.buttons || _downPointer) return; // HACK: Mobile Safari likes to send one or more `mouse` type pointermove
+	    // events immediately after non-mouse pointerup events; detect and ignore them.
 
-	    function noteSaveSection(selection) {
-	        var isSelected = (_note && _note.id === context.selectedNoteID());
-	        var noteSave = selection.selectAll('.note-save')
-	            .data((isSelected ? [_note] : []), function(d) { return d.status + d.id; });
+	    if (_lastPointerUpEvent && _lastPointerUpEvent.pointerType !== 'mouse' && d3_event.timeStamp - _lastPointerUpEvent.timeStamp < 100) return;
+	    _lastMouse = d3_event;
+	    dispatch.call('move', this, d3_event, datum(d3_event));
+	  }
 
-	        // exit
-	        noteSave.exit()
-	            .remove();
+	  function pointercancel(d3_event) {
+	    if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse')) {
+	      if (!_downPointer.isCancelled) {
+	        dispatch.call('downcancel', this);
+	      }
 
-	        // enter
-	        var noteSaveEnter = noteSave.enter()
-	            .append('div')
-	            .attr('class', 'note-save save-section cf');
-
-	        // // if new note, show categories to pick from
-	        // if (_note.isNew()) {
-	        //     var presets = presetManager;
-
-	        //     // NOTE: this key isn't a age and therefore there is no documentation (yet)
-	        //     _fieldsArr = [
-	        //         uiField(context, presets.field('category'), null, { show: true, revert: false }),
-	        //     ];
-
-	        //     _fieldsArr.forEach(function(field) {
-	        //         field
-	        //             .on('change', changeCategory);
-	        //     });
-
-	        //     noteSaveEnter
-	        //         .append('div')
-	        //         .attr('class', 'note-category')
-	        //         .call(formFields.fieldsArr(_fieldsArr));
-	        // }
-
-	        // function changeCategory() {
-	        //     // NOTE: perhaps there is a better way to get value
-	        //     var val = context.container().select('input[name=\'category\']:checked').property('__data__') || undefined;
-
-	        //     // store the unsaved category with the note itself
-	        //     _note = _note.update({ newCategory: val });
-	        //     var osm = services.osm;
-	        //     if (osm) {
-	        //         osm.replaceNote(_note);  // update note cache
-	        //     }
-	        //     noteSave
-	        //         .call(noteSaveButtons);
-	        // }
-
-	        noteSaveEnter
-	            .append('h4')
-	            .attr('class', '.note-save-header')
-	            .text(function() {
-	                return _note.isNew() ? _t('note.newDescription') : _t('note.newComment');
-	            });
+	      _downPointer = null;
+	    }
+	  }
+
+	  function mouseenter() {
+	    _mouseLeave = false;
+	  }
 
-	        var commentTextarea = noteSaveEnter
-	            .append('textarea')
-	            .attr('class', 'new-comment-input')
-	            .attr('placeholder', _t('note.inputPlaceholder'))
-	            .attr('maxlength', 1000)
-	            .property('value', function(d) { return d.newComment; })
-	            .call(utilNoAuto)
-	            .on('keydown.note-input', keydown)
-	            .on('input.note-input', changeInput)
-	            .on('blur.note-input', changeInput);
+	  function mouseleave() {
+	    _mouseLeave = true;
+	  }
 
-	        if (_newNote) {
-	            // autofocus the comment field for new notes
-	            commentTextarea.node().focus();
-	        }
+	  function allowsVertex(d) {
+	    return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+	  } // related code
+	  // - `mode/drag_node.js`     `doMove()`
+	  // - `behavior/draw.js`      `click()`
+	  // - `behavior/draw_way.js`  `move()`
 
-	        // update
-	        noteSave = noteSaveEnter
-	            .merge(noteSave)
-	            .call(userDetails)
-	            .call(noteSaveButtons);
 
+	  function click(d3_event, loc) {
+	    var d = datum(d3_event);
+	    var target = d && d.properties && d.properties.entity;
+	    var mode = context.mode();
 
-	        // fast submit if user presses cmd+enter
-	        function keydown() {
-	            if (!(event.keyCode === 13 && event.metaKey)) { return; }
+	    if (target && target.type === 'node' && allowsVertex(target)) {
+	      // Snap to a node
+	      dispatch.call('clickNode', this, target, d);
+	      return;
+	    } else if (target && target.type === 'way' && (mode.id !== 'add-point' || mode.preset.matchGeometry('vertex'))) {
+	      // Snap to a way
+	      var choice = geoChooseEdge(context.graph().childNodes(target), loc, context.projection, context.activeID());
 
-	            var osm = services.osm;
-	            if (!osm) { return; }
+	      if (choice) {
+	        var edge = [target.nodes[choice.index - 1], target.nodes[choice.index]];
+	        dispatch.call('clickWay', this, choice.loc, edge, d);
+	        return;
+	      }
+	    } else if (mode.id !== 'add-point' || mode.preset.matchGeometry('point')) {
+	      var locLatLng = context.projection.invert(loc);
+	      dispatch.call('click', this, locLatLng, d);
+	    }
+	  } // treat a spacebar press like a click
 
-	            var hasAuth = osm.authenticated();
-	            if (!hasAuth) { return; }
 
-	            if (!_note.newComment) { return; }
+	  function space(d3_event) {
+	    d3_event.preventDefault();
+	    d3_event.stopPropagation();
+	    var currSpace = context.map().mouse();
 
-	            event.preventDefault();
+	    if (_disableSpace && _lastSpace) {
+	      var dist = geoVecLength(_lastSpace, currSpace);
 
-	            select(this)
-	                .on('keydown.note-input', null);
+	      if (dist > _tolerance) {
+	        _disableSpace = false;
+	      }
+	    }
 
-	            // focus on button and submit
-	            window.setTimeout(function() {
-	                if (_note.isNew()) {
-	                    noteSave.selectAll('.save-button').node().focus();
-	                    clickSave(_note);
-	                } else  {
-	                    noteSave.selectAll('.comment-button').node().focus();
-	                    clickComment(_note);
-	                }
-	            }, 10);
-	        }
+	    if (_disableSpace || _mouseLeave || !_lastMouse) return; // user must move mouse or release space bar to allow another click
 
+	    _lastSpace = currSpace;
+	    _disableSpace = true;
+	    select(window).on('keyup.space-block', function () {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      _disableSpace = false;
+	      select(window).on('keyup.space-block', null);
+	    }); // get the current mouse position
 
-	        function changeInput() {
-	            var input = select(this);
-	            var val = input.property('value').trim() || undefined;
+	    var loc = context.map().mouse() || // or the map center if the mouse has never entered the map
+	    context.projection(context.map().center());
+	    click(d3_event, loc);
+	  }
 
-	            // store the unsaved comment with the note itself
-	            _note = _note.update({ newComment: val });
+	  function backspace(d3_event) {
+	    d3_event.preventDefault();
+	    dispatch.call('undo');
+	  }
 
-	            var osm = services.osm;
-	            if (osm) {
-	                osm.replaceNote(_note);  // update note cache
-	            }
+	  function del(d3_event) {
+	    d3_event.preventDefault();
+	    dispatch.call('cancel');
+	  }
 
-	            noteSave
-	                .call(noteSaveButtons);
-	        }
-	    }
+	  function ret(d3_event) {
+	    d3_event.preventDefault();
+	    dispatch.call('finish');
+	  }
 
+	  function behavior(selection) {
+	    context.install(_hover);
+	    context.install(_edit);
+	    _downPointer = null;
+	    keybinding.on('⌫', backspace).on('⌦', del).on('⎋', ret).on('↩', ret).on('space', space).on('⌥space', space);
+	    selection.on('mouseenter.draw', mouseenter).on('mouseleave.draw', mouseleave).on(_pointerPrefix + 'down.draw', pointerdown).on(_pointerPrefix + 'move.draw', pointermove);
+	    select(window).on(_pointerPrefix + 'up.draw', pointerup, true).on('pointercancel.draw', pointercancel, true);
+	    select(document).call(keybinding);
+	    return behavior;
+	  }
 
-	    function userDetails(selection) {
-	        var detailSection = selection.selectAll('.detail-section')
-	            .data([0]);
+	  behavior.off = function (selection) {
+	    context.ui().sidebar.hover.cancel();
+	    context.uninstall(_hover);
+	    context.uninstall(_edit);
+	    selection.on('mouseenter.draw', null).on('mouseleave.draw', null).on(_pointerPrefix + 'down.draw', null).on(_pointerPrefix + 'move.draw', null);
+	    select(window).on(_pointerPrefix + 'up.draw', null).on('pointercancel.draw', null); // note: keyup.space-block, click.draw-block should remain
 
-	        detailSection = detailSection.enter()
-	            .append('div')
-	            .attr('class', 'detail-section')
-	            .merge(detailSection);
+	    select(document).call(keybinding.unbind);
+	  };
 
-	        var osm = services.osm;
-	        if (!osm) { return; }
-
-	        // Add warning if user is not logged in
-	        var hasAuth = osm.authenticated();
-	        var authWarning = detailSection.selectAll('.auth-warning')
-	            .data(hasAuth ? [] : [0]);
-
-	        authWarning.exit()
-	            .transition()
-	            .duration(200)
-	            .style('opacity', 0)
-	            .remove();
-
-	        var authEnter = authWarning.enter()
-	            .insert('div', '.tag-reference-body')
-	            .attr('class', 'field-warning auth-warning')
-	            .style('opacity', 0);
-
-	        authEnter
-	            .call(svgIcon('#iD-icon-alert', 'inline'));
-
-	        authEnter
-	            .append('span')
-	            .text(_t('note.login'));
-
-	        authEnter
-	            .append('a')
-	            .attr('target', '_blank')
-	            .call(svgIcon('#iD-icon-out-link', 'inline'))
-	            .append('span')
-	            .text(_t('login'))
-	            .on('click.note-login', function() {
-	                event.preventDefault();
-	                osm.authenticate();
-	            });
+	  behavior.hover = function () {
+	    return _hover;
+	  };
+
+	  return utilRebind(behavior, dispatch, 'on');
+	}
+
+	function initRange(domain, range) {
+	  switch (arguments.length) {
+	    case 0:
+	      break;
 
-	        authEnter
-	            .transition()
-	            .duration(200)
-	            .style('opacity', 1);
+	    case 1:
+	      this.range(domain);
+	      break;
 
+	    default:
+	      this.range(range).domain(domain);
+	      break;
+	  }
 
-	        var prose = detailSection.selectAll('.note-save-prose')
-	            .data(hasAuth ? [0] : []);
+	  return this;
+	}
 
-	        prose.exit()
-	            .remove();
+	function constants(x) {
+	  return function () {
+	    return x;
+	  };
+	}
 
-	        prose = prose.enter()
-	            .append('p')
-	            .attr('class', 'note-save-prose')
-	            .text(_t('note.upload_explanation'))
-	            .merge(prose);
+	function number(x) {
+	  return +x;
+	}
 
-	        osm.userDetails(function(err, user) {
-	            if (err) { return; }
+	var unit = [0, 1];
+	function identity$1(x) {
+	  return x;
+	}
 
-	            var userLink = select(document.createElement('div'));
+	function normalize(a, b) {
+	  return (b -= a = +a) ? function (x) {
+	    return (x - a) / b;
+	  } : constants(isNaN(b) ? NaN : 0.5);
+	}
 
-	            if (user.image_url) {
-	                userLink
-	                    .append('img')
-	                    .attr('src', user.image_url)
-	                    .attr('class', 'icon pre-text user-icon');
-	            }
+	function clamper(a, b) {
+	  var t;
+	  if (a > b) t = a, a = b, b = t;
+	  return function (x) {
+	    return Math.max(a, Math.min(b, x));
+	  };
+	} // normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
+	// interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].
 
-	            userLink
-	                .append('a')
-	                .attr('class', 'user-info')
-	                .text(user.display_name)
-	                .attr('href', osm.userURL(user.display_name))
-	                .attr('tabindex', -1)
-	                .attr('target', '_blank');
 
-	            prose
-	                .html(_t('note.upload_explanation_with_user', { user: userLink.html() }));
-	        });
-	    }
+	function bimap(domain, range, interpolate) {
+	  var d0 = domain[0],
+	      d1 = domain[1],
+	      r0 = range[0],
+	      r1 = range[1];
+	  if (d1 < d0) d0 = normalize(d1, d0), r0 = interpolate(r1, r0);else d0 = normalize(d0, d1), r0 = interpolate(r0, r1);
+	  return function (x) {
+	    return r0(d0(x));
+	  };
+	}
 
+	function polymap(domain, range, interpolate) {
+	  var j = Math.min(domain.length, range.length) - 1,
+	      d = new Array(j),
+	      r = new Array(j),
+	      i = -1; // Reverse descending domains.
 
-	    function noteSaveButtons(selection) {
-	        var osm = services.osm;
-	        var hasAuth = osm && osm.authenticated();
+	  if (domain[j] < domain[0]) {
+	    domain = domain.slice().reverse();
+	    range = range.slice().reverse();
+	  }
 
-	        var isSelected = (_note && _note.id === context.selectedNoteID());
-	        var buttonSection = selection.selectAll('.buttons')
-	            .data((isSelected ? [_note] : []), function(d) { return d.status + d.id; });
+	  while (++i < j) {
+	    d[i] = normalize(domain[i], domain[i + 1]);
+	    r[i] = interpolate(range[i], range[i + 1]);
+	  }
 
-	        // exit
-	        buttonSection.exit()
-	            .remove();
+	  return function (x) {
+	    var i = bisectRight(domain, x, 1, j) - 1;
+	    return r[i](d[i](x));
+	  };
+	}
 
-	        // enter
-	        var buttonEnter = buttonSection.enter()
-	            .append('div')
-	            .attr('class', 'buttons');
+	function copy(source, target) {
+	  return target.domain(source.domain()).range(source.range()).interpolate(source.interpolate()).clamp(source.clamp()).unknown(source.unknown());
+	}
+	function transformer() {
+	  var domain = unit,
+	      range = unit,
+	      interpolate = interpolate$1,
+	      transform,
+	      untransform,
+	      unknown,
+	      clamp = identity$1,
+	      piecewise,
+	      output,
+	      input;
 
-	        if (_note.isNew()) {
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button cancel-button secondary-action')
-	                .text(_t('confirm.cancel'));
+	  function rescale() {
+	    var n = Math.min(domain.length, range.length);
+	    if (clamp !== identity$1) clamp = clamper(domain[0], domain[n - 1]);
+	    piecewise = n > 2 ? polymap : bimap;
+	    output = input = null;
+	    return scale;
+	  }
 
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button save-button action')
-	                .text(_t('note.save'));
+	  function scale(x) {
+	    return x == null || isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate)))(transform(clamp(x)));
+	  }
 
-	        } else {
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button status-button action');
+	  scale.invert = function (y) {
+	    return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3_interpolateNumber)))(y)));
+	  };
 
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button comment-button action')
-	                .text(_t('note.comment'));
-	        }
+	  scale.domain = function (_) {
+	    return arguments.length ? (domain = Array.from(_, number), rescale()) : domain.slice();
+	  };
 
+	  scale.range = function (_) {
+	    return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
+	  };
 
-	        // update
-	        buttonSection = buttonSection
-	            .merge(buttonEnter);
+	  scale.rangeRound = function (_) {
+	    return range = Array.from(_), interpolate = interpolateRound, rescale();
+	  };
 
-	        buttonSection.select('.cancel-button')   // select and propagate data
-	            .on('click.cancel', clickCancel);
+	  scale.clamp = function (_) {
+	    return arguments.length ? (clamp = _ ? true : identity$1, rescale()) : clamp !== identity$1;
+	  };
 
-	        buttonSection.select('.save-button')     // select and propagate data
-	            .attr('disabled', isSaveDisabled)
-	            .on('click.save', clickSave);
+	  scale.interpolate = function (_) {
+	    return arguments.length ? (interpolate = _, rescale()) : interpolate;
+	  };
 
-	        buttonSection.select('.status-button')   // select and propagate data
-	            .attr('disabled', (hasAuth ? null : true))
-	            .text(function(d) {
-	                var action = (d.status === 'open' ? 'close' : 'open');
-	                var andComment = (d.newComment ? '_comment' : '');
-	                return _t('note.' + action + andComment);
-	            })
-	            .on('click.status', clickStatus);
+	  scale.unknown = function (_) {
+	    return arguments.length ? (unknown = _, scale) : unknown;
+	  };
 
-	        buttonSection.select('.comment-button')   // select and propagate data
-	            .attr('disabled', isSaveDisabled)
-	            .on('click.comment', clickComment);
+	  return function (t, u) {
+	    transform = t, untransform = u;
+	    return rescale();
+	  };
+	}
+	function continuous() {
+	  return transformer()(identity$1, identity$1);
+	}
 
+	function formatDecimal (x) {
+	  return Math.abs(x = Math.round(x)) >= 1e21 ? x.toLocaleString("en").replace(/,/g, "") : x.toString(10);
+	} // Computes the decimal coefficient and exponent of the specified number x with
+	// significant digits p, where x is positive and p is in [1, 21] or undefined.
+	// For example, formatDecimalParts(1.23) returns ["123", 0].
 
-	        function isSaveDisabled(d) {
-	            return (hasAuth && d.status === 'open' && d.newComment) ? null : true;
-	        }
-	    }
+	function formatDecimalParts(x, p) {
+	  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
 
+	  var i,
+	      coefficient = x.slice(0, i); // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
+	  // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
 
+	  return [coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, +x.slice(i + 1)];
+	}
 
-	    function clickCancel(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.removeNote(d);
-	        }
-	        context.enter(modeBrowse(context));
-	        dispatch$1.call('change');
-	    }
+	function exponent (x) {
+	  return x = formatDecimalParts(Math.abs(x)), x ? x[1] : NaN;
+	}
 
+	function formatGroup (grouping, thousands) {
+	  return function (value, width) {
+	    var i = value.length,
+	        t = [],
+	        j = 0,
+	        g = grouping[0],
+	        length = 0;
 
-	    function clickSave(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.postNoteCreate(d, function(err, note) {
-	                dispatch$1.call('change', note);
-	            });
-	        }
+	    while (i > 0 && g > 0) {
+	      if (length + g + 1 > width) g = Math.max(1, width - length);
+	      t.push(value.substring(i -= g, i + g));
+	      if ((length += g + 1) > width) break;
+	      g = grouping[j = (j + 1) % grouping.length];
 	    }
 
+	    return t.reverse().join(thousands);
+	  };
+	}
 
-	    function clickStatus(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var osm = services.osm;
-	        if (osm) {
-	            var setStatus = (d.status === 'open' ? 'closed' : 'open');
-	            osm.postNoteUpdate(d, setStatus, function(err, note) {
-	                dispatch$1.call('change', note);
-	            });
-	        }
-	    }
+	function formatNumerals (numerals) {
+	  return function (value) {
+	    return value.replace(/[0-9]/g, function (i) {
+	      return numerals[+i];
+	    });
+	  };
+	}
 
-	    function clickComment(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.postNoteUpdate(d, d.status, function(err, note) {
-	                dispatch$1.call('change', note);
-	            });
-	        }
-	    }
+	// [[fill]align][sign][symbol][0][width][,][.precision][~][type]
+	var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
+	function formatSpecifier(specifier) {
+	  if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
+	  var match;
+	  return new FormatSpecifier({
+	    fill: match[1],
+	    align: match[2],
+	    sign: match[3],
+	    symbol: match[4],
+	    zero: match[5],
+	    width: match[6],
+	    comma: match[7],
+	    precision: match[8] && match[8].slice(1),
+	    trim: match[9],
+	    type: match[10]
+	  });
+	}
+	formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
 
+	function FormatSpecifier(specifier) {
+	  this.fill = specifier.fill === undefined ? " " : specifier.fill + "";
+	  this.align = specifier.align === undefined ? ">" : specifier.align + "";
+	  this.sign = specifier.sign === undefined ? "-" : specifier.sign + "";
+	  this.symbol = specifier.symbol === undefined ? "" : specifier.symbol + "";
+	  this.zero = !!specifier.zero;
+	  this.width = specifier.width === undefined ? undefined : +specifier.width;
+	  this.comma = !!specifier.comma;
+	  this.precision = specifier.precision === undefined ? undefined : +specifier.precision;
+	  this.trim = !!specifier.trim;
+	  this.type = specifier.type === undefined ? "" : specifier.type + "";
+	}
 
-	    noteEditor.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteEditor;
-	    };
+	FormatSpecifier.prototype.toString = function () {
+	  return this.fill + this.align + this.sign + this.symbol + (this.zero ? "0" : "") + (this.width === undefined ? "" : Math.max(1, this.width | 0)) + (this.comma ? "," : "") + (this.precision === undefined ? "" : "." + Math.max(0, this.precision | 0)) + (this.trim ? "~" : "") + this.type;
+	};
 
-	    noteEditor.newNote = function(val) {
-	        if (!arguments.length) { return _newNote; }
-	        _newNote = val;
-	        return noteEditor;
-	    };
+	// Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.
+	function formatTrim (s) {
+	  out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {
+	    switch (s[i]) {
+	      case ".":
+	        i0 = i1 = i;
+	        break;
+
+	      case "0":
+	        if (i0 === 0) i0 = i;
+	        i1 = i;
+	        break;
 
+	      default:
+	        if (!+s[i]) break out;
+	        if (i0 > 0) i0 = 0;
+	        break;
+	    }
+	  }
 
-	    return utilRebind(noteEditor, dispatch$1, 'on');
+	  return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
 	}
 
-	function modeSelectNote(context, selectedNoteID) {
-	    var mode = {
-	        id: 'select-note',
-	        button: 'browse'
-	    };
+	var $$5 = _export;
+	var uncurryThis$3 = functionUncurryThis;
+	var fails$3 = fails$V;
+	var thisNumberValue = thisNumberValue$3;
 
-	    var _keybinding = utilKeybinding('select-note');
-	    var _noteEditor = uiNoteEditor(context)
-	        .on('change', function() {
-	            context.map().pan([0,0]);  // trigger a redraw
-	            var note = checkSelectedID();
-	            if (!note) { return; }
-	            context.ui().sidebar
-	                .show(_noteEditor.note(note));
-	        });
+	var un$ToPrecision = uncurryThis$3(1.0.toPrecision);
 
-	    var _behaviors = [
-	        behaviorBreathe(),
-	        behaviorHover(context),
-	        behaviorSelect(context),
-	        behaviorLasso(context),
-	        modeDragNode(context).behavior,
-	        modeDragNote(context).behavior
-	    ];
+	var FORCED$1 = fails$3(function () {
+	  // IE7-
+	  return un$ToPrecision(1, undefined) !== '1';
+	}) || !fails$3(function () {
+	  // V8 ~ Android 4.3-
+	  un$ToPrecision({});
+	});
+
+	// `Number.prototype.toPrecision` method
+	// https://tc39.es/ecma262/#sec-number.prototype.toprecision
+	$$5({ target: 'Number', proto: true, forced: FORCED$1 }, {
+	  toPrecision: function toPrecision(precision) {
+	    return precision === undefined
+	      ? un$ToPrecision(thisNumberValue(this))
+	      : un$ToPrecision(thisNumberValue(this), precision);
+	  }
+	});
 
-	    var _newFeature = false;
+	var prefixExponent;
+	function formatPrefixAuto (x, p) {
+	  var d = formatDecimalParts(x, p);
+	  if (!d) return x + "";
+	  var coefficient = d[0],
+	      exponent = d[1],
+	      i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
+	      n = coefficient.length;
+	  return i === n ? coefficient : i > n ? coefficient + new Array(i - n + 1).join("0") : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i) : "0." + new Array(1 - i).join("0") + formatDecimalParts(x, Math.max(0, p + i - 1))[0]; // less than 1y!
+	}
 
+	function formatRounded (x, p) {
+	  var d = formatDecimalParts(x, p);
+	  if (!d) return x + "";
+	  var coefficient = d[0],
+	      exponent = d[1];
+	  return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1) : coefficient + new Array(exponent - coefficient.length + 2).join("0");
+	}
 
-	    function checkSelectedID() {
-	        if (!services.osm) { return; }
-	        var note = services.osm.getNote(selectedNoteID);
-	        if (!note) {
-	            context.enter(modeBrowse(context));
-	        }
-	        return note;
-	    }
+	var formatTypes = {
+	  "%": function _(x, p) {
+	    return (x * 100).toFixed(p);
+	  },
+	  "b": function b(x) {
+	    return Math.round(x).toString(2);
+	  },
+	  "c": function c(x) {
+	    return x + "";
+	  },
+	  "d": formatDecimal,
+	  "e": function e(x, p) {
+	    return x.toExponential(p);
+	  },
+	  "f": function f(x, p) {
+	    return x.toFixed(p);
+	  },
+	  "g": function g(x, p) {
+	    return x.toPrecision(p);
+	  },
+	  "o": function o(x) {
+	    return Math.round(x).toString(8);
+	  },
+	  "p": function p(x, _p) {
+	    return formatRounded(x * 100, _p);
+	  },
+	  "r": formatRounded,
+	  "s": formatPrefixAuto,
+	  "X": function X(x) {
+	    return Math.round(x).toString(16).toUpperCase();
+	  },
+	  "x": function x(_x) {
+	    return Math.round(_x).toString(16);
+	  }
+	};
 
+	function identity (x) {
+	  return x;
+	}
 
-	    // class the note as selected, or return to browse mode if the note is gone
-	    function selectNote(drawn) {
-	        if (!checkSelectedID()) { return; }
+	var map$1 = Array.prototype.map,
+	    prefixes = ["y", "z", "a", "f", "p", "n", "µ", "m", "", "k", "M", "G", "T", "P", "E", "Z", "Y"];
+	function formatLocale (locale) {
+	  var group = locale.grouping === undefined || locale.thousands === undefined ? identity : formatGroup(map$1.call(locale.grouping, Number), locale.thousands + ""),
+	      currencyPrefix = locale.currency === undefined ? "" : locale.currency[0] + "",
+	      currencySuffix = locale.currency === undefined ? "" : locale.currency[1] + "",
+	      decimal = locale.decimal === undefined ? "." : locale.decimal + "",
+	      numerals = locale.numerals === undefined ? identity : formatNumerals(map$1.call(locale.numerals, String)),
+	      percent = locale.percent === undefined ? "%" : locale.percent + "",
+	      minus = locale.minus === undefined ? "−" : locale.minus + "",
+	      nan = locale.nan === undefined ? "NaN" : locale.nan + "";
 
-	        var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
+	  function newFormat(specifier) {
+	    specifier = formatSpecifier(specifier);
+	    var fill = specifier.fill,
+	        align = specifier.align,
+	        sign = specifier.sign,
+	        symbol = specifier.symbol,
+	        zero = specifier.zero,
+	        width = specifier.width,
+	        comma = specifier.comma,
+	        precision = specifier.precision,
+	        trim = specifier.trim,
+	        type = specifier.type; // The "n" type is an alias for ",g".
 
-	        if (selection.empty()) {
-	            // Return to browse mode if selected DOM elements have
-	            // disappeared because the user moved them out of view..
-	            var source = event && event.type === 'zoom' && event.sourceEvent;
-	            if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-	                context.enter(modeBrowse(context));
-	            }
+	    if (type === "n") comma = true, type = "g"; // The "" type, and any invalid type, is an alias for ".12~g".
+	    else if (!formatTypes[type]) precision === undefined && (precision = 12), trim = true, type = "g"; // If zero fill is specified, padding goes after sign and before digits.
 
-	        } else {
-	            selection
-	                .classed('selected', true);
+	    if (zero || fill === "0" && align === "=") zero = true, fill = "0", align = "="; // Compute the prefix and suffix.
+	    // For SI-prefix, the suffix is lazily computed.
 
-	            context.selectedNoteID(selectedNoteID);
-	        }
-	    }
+	    var prefix = symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
+	        suffix = symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : ""; // What format function should we use?
+	    // Is this an integer type?
+	    // Can this type generate exponential notation?
 
+	    var formatType = formatTypes[type],
+	        maybeSuffix = /[defgprs%]/.test(type); // Set the default precision if not specified,
+	    // or clamp the specified precision to the supported range.
+	    // For significant precision, it must be in [1, 21].
+	    // For fixed precision, it must be in [0, 20].
 
-	    function esc() {
-	        if (context.container().select('.combobox').size()) { return; }
-	        context.enter(modeBrowse(context));
-	    }
+	    precision = precision === undefined ? 6 : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) : Math.max(0, Math.min(20, precision));
 
+	    function format(value) {
+	      var valuePrefix = prefix,
+	          valueSuffix = suffix,
+	          i,
+	          n,
+	          c;
 
-	    mode.zoomToSelected = function() {
-	        if (!services.osm) { return; }
-	        var note = services.osm.getNote(selectedNoteID);
-	        if (note) {
-	            context.map().centerZoomEase(note.loc, 20);
-	        }
-	    };
+	      if (type === "c") {
+	        valueSuffix = formatType(value) + valueSuffix;
+	        value = "";
+	      } else {
+	        value = +value; // Determine the sign. -0 is not less than 0, but 1 / -0 is!
 
+	        var valueNegative = value < 0 || 1 / value < 0; // Perform the initial formatting.
 
-	    mode.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        return mode;
-	    };
+	        value = isNaN(value) ? nan : formatType(Math.abs(value), precision); // Trim insignificant zeros.
 
+	        if (trim) value = formatTrim(value); // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
 
-	    mode.enter = function() {
-	        var note = checkSelectedID();
-	        if (!note) { return; }
+	        if (valueNegative && +value === 0 && sign !== "+") valueNegative = false; // Compute the prefix and suffix.
 
-	        _behaviors.forEach(context.install);
+	        valuePrefix = (valueNegative ? sign === "(" ? sign : minus : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
+	        valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : ""); // Break the formatted value into the integer “value” part that can be
+	        // grouped, and fractional or exponential “suffix” part that is not.
+
+	        if (maybeSuffix) {
+	          i = -1, n = value.length;
 
-	        _keybinding
-	            .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-	            .on('⎋', esc, true);
+	          while (++i < n) {
+	            if (c = value.charCodeAt(i), 48 > c || c > 57) {
+	              valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
+	              value = value.slice(0, i);
+	              break;
+	            }
+	          }
+	        }
+	      } // If the fill character is not "0", grouping is applied before padding.
 
-	        select(document)
-	            .call(_keybinding);
 
-	        selectNote();
+	      if (comma && !zero) value = group(value, Infinity); // Compute the padding.
 
-	        var sidebar = context.ui().sidebar;
-	        sidebar.show(_noteEditor.note(note).newNote(_newFeature));
+	      var length = valuePrefix.length + value.length + valueSuffix.length,
+	          padding = length < width ? new Array(width - length + 1).join(fill) : ""; // If the fill character is "0", grouping is applied after padding.
 
-	        // expand the sidebar, avoid obscuring the note if needed
-	        sidebar.expand(sidebar.intersects(note.extent()));
+	      if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; // Reconstruct the final output based on the desired alignment.
 
-	        context.map()
-	            .on('drawn.select', selectNote);
-	    };
+	      switch (align) {
+	        case "<":
+	          value = valuePrefix + value + valueSuffix + padding;
+	          break;
 
+	        case "=":
+	          value = valuePrefix + padding + value + valueSuffix;
+	          break;
 
-	    mode.exit = function() {
-	        _behaviors.forEach(context.uninstall);
+	        case "^":
+	          value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
+	          break;
 
-	        select(document)
-	            .call(_keybinding.unbind);
+	        default:
+	          value = padding + valuePrefix + value + valueSuffix;
+	          break;
+	      }
 
-	        context.surface()
-	            .selectAll('.layer-notes .selected')
-	            .classed('selected hover', false);
+	      return numerals(value);
+	    }
 
-	        context.map()
-	            .on('drawn.select', null);
+	    format.toString = function () {
+	      return specifier + "";
+	    };
 
-	        context.ui().sidebar
-	            .hide();
+	    return format;
+	  }
 
-	        context.selectedNoteID(null);
+	  function formatPrefix(specifier, value) {
+	    var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
+	        e = Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3,
+	        k = Math.pow(10, -e),
+	        prefix = prefixes[8 + e / 3];
+	    return function (value) {
+	      return f(k * value) + prefix;
 	    };
+	  }
 
+	  return {
+	    format: newFormat,
+	    formatPrefix: formatPrefix
+	  };
+	}
 
-	    return mode;
+	var locale;
+	var format$1;
+	var formatPrefix;
+	defaultLocale({
+	  thousands: ",",
+	  grouping: [3],
+	  currency: ["$", ""]
+	});
+	function defaultLocale(definition) {
+	  locale = formatLocale(definition);
+	  format$1 = locale.format;
+	  formatPrefix = locale.formatPrefix;
+	  return locale;
 	}
 
-	function modeDragNote(context) {
-	    var mode = {
-	        id: 'drag-note',
-	        button: 'browse'
-	    };
+	function precisionFixed (step) {
+	  return Math.max(0, -exponent(Math.abs(step)));
+	}
 
-	    var edit = behaviorEdit(context);
+	function precisionPrefix (step, value) {
+	  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
+	}
 
-	    var _nudgeInterval;
-	    var _lastLoc;
-	    var _note;    // most current note.. dragged note may have stale datum.
+	function precisionRound (step, max) {
+	  step = Math.abs(step), max = Math.abs(max) - step;
+	  return Math.max(0, exponent(max) - exponent(step)) + 1;
+	}
 
+	function tickFormat(start, stop, count, specifier) {
+	  var step = tickStep(start, stop, count),
+	      precision;
+	  specifier = formatSpecifier(specifier == null ? ",f" : specifier);
 
-	    function startNudge(nudge) {
-	        if (_nudgeInterval) { window.clearInterval(_nudgeInterval); }
-	        _nudgeInterval = window.setInterval(function() {
-	            context.map().pan(nudge);
-	            doMove(nudge);
-	        }, 50);
-	    }
+	  switch (specifier.type) {
+	    case "s":
+	      {
+	        var value = Math.max(Math.abs(start), Math.abs(stop));
+	        if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
+	        return formatPrefix(specifier, value);
+	      }
 
+	    case "":
+	    case "e":
+	    case "g":
+	    case "p":
+	    case "r":
+	      {
+	        if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
+	        break;
+	      }
 
-	    function stopNudge() {
-	        if (_nudgeInterval) {
-	            window.clearInterval(_nudgeInterval);
-	            _nudgeInterval = null;
-	        }
-	    }
+	    case "f":
+	    case "%":
+	      {
+	        if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
+	        break;
+	      }
+	  }
 
+	  return format$1(specifier);
+	}
 
-	    function origin(note) {
-	        return context.projection(note.loc);
-	    }
+	function linearish(scale) {
+	  var domain = scale.domain;
 
+	  scale.ticks = function (count) {
+	    var d = domain();
+	    return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
+	  };
 
-	    function start(note) {
-	        _note = note;
-	        var osm = services.osm;
-	        if (osm) {
-	            // Get latest note from cache.. The marker may have a stale datum bound to it
-	            // and dragging it around can sometimes delete the users note comment.
-	            _note = osm.getNote(_note.id);
-	        }
+	  scale.tickFormat = function (count, specifier) {
+	    var d = domain();
+	    return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
+	  };
 
-	        context.surface().selectAll('.note-' + _note.id)
-	            .classed('active', true);
+	  scale.nice = function (count) {
+	    if (count == null) count = 10;
+	    var d = domain();
+	    var i0 = 0;
+	    var i1 = d.length - 1;
+	    var start = d[i0];
+	    var stop = d[i1];
+	    var prestep;
+	    var step;
+	    var maxIter = 10;
 
-	        context.perform(actionNoop());
-	        context.enter(mode);
-	        context.selectedNoteID(_note.id);
+	    if (stop < start) {
+	      step = start, start = stop, stop = step;
+	      step = i0, i0 = i1, i1 = step;
 	    }
 
+	    while (maxIter-- > 0) {
+	      step = tickIncrement(start, stop, count);
 
-	    function move() {
-	        event.sourceEvent.stopPropagation();
-	        _lastLoc = context.projection.invert(event.point);
+	      if (step === prestep) {
+	        d[i0] = start;
+	        d[i1] = stop;
+	        return domain(d);
+	      } else if (step > 0) {
+	        start = Math.floor(start / step) * step;
+	        stop = Math.ceil(stop / step) * step;
+	      } else if (step < 0) {
+	        start = Math.ceil(start * step) / step;
+	        stop = Math.floor(stop * step) / step;
+	      } else {
+	        break;
+	      }
 
-	        doMove();
-	        var nudge = geoViewportEdge(event.point, context.map().dimensions());
-	        if (nudge) {
-	            startNudge(nudge);
-	        } else {
-	            stopNudge();
-	        }
+	      prestep = step;
 	    }
 
+	    return scale;
+	  };
+
+	  return scale;
+	}
+	function linear() {
+	  var scale = continuous();
 
-	    function doMove(nudge) {
-	        nudge = nudge || [0, 0];
+	  scale.copy = function () {
+	    return copy(scale, linear());
+	  };
 
-	        var currPoint = (event && event.point) || context.projection(_lastLoc);
-	        var currMouse = geoVecSubtract(currPoint, nudge);
-	        var loc = context.projection.invert(currMouse);
+	  initRange.apply(scale, arguments);
+	  return linearish(scale);
+	}
 
-	        _note = _note.move(loc);
+	// eslint-disable-next-line es/no-math-expm1 -- safe
+	var $expm1 = Math.expm1;
+	var exp$1 = Math.exp;
 
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.replaceNote(_note);  // update note cache
-	        }
+	// `Math.expm1` method implementation
+	// https://tc39.es/ecma262/#sec-math.expm1
+	var mathExpm1 = (!$expm1
+	  // Old FF bug
+	  || $expm1(10) > 22025.465794806719 || $expm1(10) < 22025.4657948067165168
+	  // Tor Browser bug
+	  || $expm1(-2e-17) != -2e-17
+	) ? function expm1(x) {
+	  return (x = +x) == 0 ? x : x > -1e-6 && x < 1e-6 ? x + x * x / 2 : exp$1(x) - 1;
+	} : $expm1;
 
-	        context.replace(actionNoop());   // trigger redraw
-	    }
+	function quantize() {
+	  var x0 = 0,
+	      x1 = 1,
+	      n = 1,
+	      domain = [0.5],
+	      range = [0, 1],
+	      unknown;
 
+	  function scale(x) {
+	    return x != null && x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
+	  }
 
-	    function end() {
-	        context.replace(actionNoop());   // trigger redraw
+	  function rescale() {
+	    var i = -1;
+	    domain = new Array(n);
 
-	        context
-	            .selectedNoteID(_note.id)
-	            .enter(modeSelectNote(context, _note.id));
+	    while (++i < n) {
+	      domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
 	    }
 
+	    return scale;
+	  }
 
-	    var drag = behaviorDrag()
-	        .selector('.layer-touch.markers .target.note.new')
-	        .surface(context.container().select('.main-map').node())
-	        .origin(origin)
-	        .on('start', start)
-	        .on('move', move)
-	        .on('end', end);
-
+	  scale.domain = function (_) {
+	    var _ref, _ref2;
 
-	    mode.enter = function() {
-	        context.install(edit);
-	    };
+	    return arguments.length ? ((_ref = _, _ref2 = _slicedToArray(_ref, 2), x0 = _ref2[0], x1 = _ref2[1], _ref), x0 = +x0, x1 = +x1, rescale()) : [x0, x1];
+	  };
 
+	  scale.range = function (_) {
+	    return arguments.length ? (n = (range = Array.from(_)).length - 1, rescale()) : range.slice();
+	  };
 
-	    mode.exit = function() {
-	        context.ui().sidebar.hover.cancel();
-	        context.uninstall(edit);
+	  scale.invertExtent = function (y) {
+	    var i = range.indexOf(y);
+	    return i < 0 ? [NaN, NaN] : i < 1 ? [x0, domain[0]] : i >= n ? [domain[n - 1], x1] : [domain[i - 1], domain[i]];
+	  };
 
-	        context.surface()
-	            .selectAll('.active')
-	            .classed('active', false);
+	  scale.unknown = function (_) {
+	    return arguments.length ? (unknown = _, scale) : scale;
+	  };
 
-	        stopNudge();
-	    };
+	  scale.thresholds = function () {
+	    return domain.slice();
+	  };
 
-	    mode.behavior = drag;
+	  scale.copy = function () {
+	    return quantize().domain([x0, x1]).range(range).unknown(unknown);
+	  };
 
-	    return mode;
+	  return initRange.apply(linearish(scale), arguments);
 	}
 
-	function uiDataHeader() {
-	    var _datum;
+	var global$3 = global$1o;
+	var uncurryThis$2 = functionUncurryThis;
+	var fails$2 = fails$V;
+	var padStart = stringPad.start;
+
+	var RangeError$2 = global$3.RangeError;
+	var abs$1 = Math.abs;
+	var DatePrototype = Date.prototype;
+	var n$DateToISOString = DatePrototype.toISOString;
+	var getTime = uncurryThis$2(DatePrototype.getTime);
+	var getUTCDate = uncurryThis$2(DatePrototype.getUTCDate);
+	var getUTCFullYear = uncurryThis$2(DatePrototype.getUTCFullYear);
+	var getUTCHours = uncurryThis$2(DatePrototype.getUTCHours);
+	var getUTCMilliseconds = uncurryThis$2(DatePrototype.getUTCMilliseconds);
+	var getUTCMinutes = uncurryThis$2(DatePrototype.getUTCMinutes);
+	var getUTCMonth = uncurryThis$2(DatePrototype.getUTCMonth);
+	var getUTCSeconds = uncurryThis$2(DatePrototype.getUTCSeconds);
+
+	// `Date.prototype.toISOString` method implementation
+	// https://tc39.es/ecma262/#sec-date.prototype.toisostring
+	// PhantomJS / old WebKit fails here:
+	var dateToIsoString = (fails$2(function () {
+	  return n$DateToISOString.call(new Date(-5e13 - 1)) != '0385-07-25T07:06:39.999Z';
+	}) || !fails$2(function () {
+	  n$DateToISOString.call(new Date(NaN));
+	})) ? function toISOString() {
+	  if (!isFinite(getTime(this))) throw RangeError$2('Invalid time value');
+	  var date = this;
+	  var year = getUTCFullYear(date);
+	  var milliseconds = getUTCMilliseconds(date);
+	  var sign = year < 0 ? '-' : year > 9999 ? '+' : '';
+	  return sign + padStart(abs$1(year), sign ? 6 : 4, 0) +
+	    '-' + padStart(getUTCMonth(date) + 1, 2, 0) +
+	    '-' + padStart(getUTCDate(date), 2, 0) +
+	    'T' + padStart(getUTCHours(date), 2, 0) +
+	    ':' + padStart(getUTCMinutes(date), 2, 0) +
+	    ':' + padStart(getUTCSeconds(date), 2, 0) +
+	    '.' + padStart(milliseconds, 3, 0) +
+	    'Z';
+	} : n$DateToISOString;
+
+	var $$4 = _export;
+	var toISOString = dateToIsoString;
+
+	// `Date.prototype.toISOString` method
+	// https://tc39.es/ecma262/#sec-date.prototype.toisostring
+	// PhantomJS / old WebKit has a broken implementations
+	$$4({ target: 'Date', proto: true, forced: Date.prototype.toISOString !== toISOString }, {
+	  toISOString: toISOString
+	});
 
+	function behaviorBreathe() {
+	  var duration = 800;
+	  var steps = 4;
+	  var selector = '.selected.shadow, .selected .shadow';
 
-	    function dataHeader(selection) {
-	        var header = selection.selectAll('.data-header')
-	            .data(
-	                (_datum ? [_datum] : []),
-	                function(d) { return d.__featurehash__; }
-	            );
+	  var _selected = select(null);
 
-	        header.exit()
-	            .remove();
+	  var _classed = '';
+	  var _params = {};
+	  var _done = false;
 
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'data-header');
+	  var _timer;
 
-	        var iconEnter = headerEnter
-	            .append('div')
-	            .attr('class', 'data-header-icon');
+	  function ratchetyInterpolator(a, b, steps, units) {
+	    a = parseFloat(a);
+	    b = parseFloat(b);
+	    var sample = quantize().domain([0, 1]).range(d3_quantize(d3_interpolateNumber(a, b), steps));
+	    return function (t) {
+	      return String(sample(t)) + (units || '');
+	    };
+	  }
 
-	        iconEnter
-	            .append('div')
-	            .attr('class', 'preset-icon-28')
-	            .call(svgIcon('#iD-icon-data', 'note-fill'));
+	  function reset(selection) {
+	    selection.style('stroke-opacity', null).style('stroke-width', null).style('fill-opacity', null).style('r', null);
+	  }
 
-	        headerEnter
-	            .append('div')
-	            .attr('class', 'data-header-label')
-	            .text(_t('map_data.layers.custom.title'));
-	    }
+	  function setAnimationParams(transition, fromTo) {
+	    var toFrom = fromTo === 'from' ? 'to' : 'from';
+	    transition.styleTween('stroke-opacity', function (d) {
+	      return ratchetyInterpolator(_params[d.id][toFrom].opacity, _params[d.id][fromTo].opacity, steps);
+	    }).styleTween('stroke-width', function (d) {
+	      return ratchetyInterpolator(_params[d.id][toFrom].width, _params[d.id][fromTo].width, steps, 'px');
+	    }).styleTween('fill-opacity', function (d) {
+	      return ratchetyInterpolator(_params[d.id][toFrom].opacity, _params[d.id][fromTo].opacity, steps);
+	    }).styleTween('r', function (d) {
+	      return ratchetyInterpolator(_params[d.id][toFrom].width, _params[d.id][fromTo].width, steps, 'px');
+	    });
+	  }
 
+	  function calcAnimationParams(selection) {
+	    selection.call(reset).each(function (d) {
+	      var s = select(this);
+	      var tag = s.node().tagName;
+	      var p = {
+	        'from': {},
+	        'to': {}
+	      };
+	      var opacity;
+	      var width; // determine base opacity and width
 
-	    dataHeader.datum = function(val) {
-	        if (!arguments.length) { return _datum; }
-	        _datum = val;
-	        return this;
-	    };
+	      if (tag === 'circle') {
+	        opacity = parseFloat(s.style('fill-opacity') || 0.5);
+	        width = parseFloat(s.style('r') || 15.5);
+	      } else {
+	        opacity = parseFloat(s.style('stroke-opacity') || 0.7);
+	        width = parseFloat(s.style('stroke-width') || 10);
+	      } // calculate from/to interpolation params..
 
 
-	    return dataHeader;
-	}
+	      p.tag = tag;
+	      p.from.opacity = opacity * 0.6;
+	      p.to.opacity = opacity * 1.25;
+	      p.from.width = width * 0.7;
+	      p.to.width = width * (tag === 'circle' ? 1.5 : 1);
+	      _params[d.id] = p;
+	    });
+	  }
 
-	// This code assumes that the combobox values will not have duplicate entries.
-	// It is keyed on the `value` of the entry. Data should be an array of objects like:
-	//   [{
-	//       value:  'display text',  // required
-	//       title:  'hover text'     // optional
-	//   }, ...]
+	  function run(surface, fromTo) {
+	    var toFrom = fromTo === 'from' ? 'to' : 'from';
+	    var currSelected = surface.selectAll(selector);
+	    var currClassed = surface.attr('class');
 
-	var _comboHideTimerID;
+	    if (_done || currSelected.empty()) {
+	      _selected.call(reset);
 
-	function uiCombobox(context, klass) {
-	    var dispatch$1 = dispatch('accept', 'cancel');
-	    var container = context.container();
+	      _selected = select(null);
+	      return;
+	    }
 
-	    var _suggestions = [];
-	    var _data = [];
-	    var _fetched = {};
-	    var _selected = null;
-	    var _canAutocomplete = true;
-	    var _caseSensitive = false;
-	    var _cancelFetch = false;
-	    var _minItems = 2;
-	    var _tDown = 0;
-	    var _mouseEnterHandler, _mouseLeaveHandler;
-
-	    var _fetcher = function(val, cb) {
-	        cb(_data.filter(function(d) {
-	            var terms = d.terms || [];
-	            terms.push(d.value);
-	            return terms.some(function(term) {
-	                return term
-	                    .toString()
-	                    .toLowerCase()
-	                    .indexOf(val.toLowerCase()) !== -1;
-	            });
-	        }));
-	    };
+	    if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
+	      _selected.call(reset);
 
-	    var combobox = function(input, attachTo) {
-	        if (!input || input.empty()) { return; }
-
-	        input
-	            .classed('combobox-input', true)
-	            .on('focus.combo-input', focus)
-	            .on('blur.combo-input', blur)
-	            .on('keydown.combo-input', keydown)
-	            .on('keyup.combo-input', keyup)
-	            .on('input.combo-input', change)
-	            .on('mousedown.combo-input', mousedown)
-	            .each(function() {
-	                var parent = this.parentNode;
-	                var sibling = this.nextSibling;
-
-	                select(parent).selectAll('.combobox-caret')
-	                    .filter(function(d) { return d === input.node(); })
-	                    .data([input.node()])
-	                    .enter()
-	                    .insert('div', function() { return sibling; })
-	                    .attr('class', 'combobox-caret')
-	                    .on('mousedown.combo-caret', function() {
-	                        event.preventDefault(); // don't steal focus from input
-	                        input.node().focus(); // focus the input as if it was clicked
-	                        mousedown();
-	                    })
-	                    .on('mouseup.combo-caret', function() {
-	                        event.preventDefault(); // don't steal focus from input
-	                        mouseup();
-	                    });
-	            });
+	      _classed = currClassed;
+	      _selected = currSelected.call(calcAnimationParams);
+	    }
 
+	    var didCallNextRun = false;
 
-	        function mousedown() {
-	            if (event.button !== 0) { return; }    // left click only
-	            _tDown = +new Date();
+	    _selected.transition().duration(duration).call(setAnimationParams, fromTo).on('end', function () {
+	      // `end` event is called for each selected element, but we want
+	      // it to run only once
+	      if (!didCallNextRun) {
+	        surface.call(run, toFrom);
+	        didCallNextRun = true;
+	      } // if entity was deselected, remove breathe styling
 
-	            // clear selection
-	            var start = input.property('selectionStart');
-	            var end = input.property('selectionEnd');
-	            if (start !== end) {
-	                var val = utilGetSetValue(input);
-	                input.node().setSelectionRange(val.length, val.length);
-	                return;
-	            }
 
-	            input.on('mouseup.combo-input', mouseup);
-	        }
+	      if (!select(this).classed('selected')) {
+	        reset(select(this));
+	      }
+	    });
+	  }
+
+	  function behavior(surface) {
+	    _done = false;
+	    _timer = timer(function () {
+	      // wait for elements to actually become selected
+	      if (surface.selectAll(selector).empty()) {
+	        return false;
+	      }
 
+	      surface.call(run, 'from');
 
-	        function mouseup() {
-	            input.on('mouseup.combo-input', null);
-	            if (event.button !== 0) { return; }    // left click only
-	            if (input.node() !== document.activeElement) { return; }   // exit if this input is not focused
+	      _timer.stop();
 
-	            var start = input.property('selectionStart');
-	            var end = input.property('selectionEnd');
-	            if (start !== end) { return; }  // exit if user is selecting
-
-	            // not showing or showing for a different field - try to show it.
-	            var combo = container.selectAll('.combobox');
-	            if (combo.empty() || combo.datum() !== input.node()) {
-	                var tOrig = _tDown;
-	                window.setTimeout(function() {
-	                    if (tOrig !== _tDown) { return; }   // exit if user double clicked
-	                    fetchComboData('', function() {
-	                        show();
-	                        render();
-	                    });
-	                }, 250);
+	      return true;
+	    }, 20);
+	  }
 
-	            } else {
-	                hide();
-	            }
-	        }
+	  behavior.restartIfNeeded = function (surface) {
+	    if (_selected.empty()) {
+	      surface.call(run, 'from');
 
+	      if (_timer) {
+	        _timer.stop();
+	      }
+	    }
+	  };
 
-	        function focus() {
-	            fetchComboData('');   // prefetch values (may warm taginfo cache)
-	        }
+	  behavior.off = function () {
+	    _done = true;
 
+	    if (_timer) {
+	      _timer.stop();
+	    }
 
-	        function blur() {
-	            _comboHideTimerID = window.setTimeout(hide, 75);
-	        }
+	    _selected.interrupt().call(reset);
+	  };
 
+	  return behavior;
+	}
 
-	        function show() {
-	            hide();   // remove any existing
+	/* Creates a keybinding behavior for an operation */
+	function behaviorOperation(context) {
+	  var _operation;
 
-	            container
-	                .insert('div', ':first-child')
-	                .datum(input.node())
-	                .attr('class', 'combobox' + (klass ? ' combobox-' + klass : ''))
-	                .style('position', 'absolute')
-	                .style('display', 'block')
-	                .style('left', '0px')
-	                .on('mousedown.combo-container', function () {
-	                    // prevent moving focus out of the input field
-	                    event.preventDefault();
-	                });
+	  function keypress(d3_event) {
+	    // prevent operations during low zoom selection
+	    if (!context.map().withinEditableZoom()) return;
+	    if (_operation.availableForKeypress && !_operation.availableForKeypress()) return;
+	    d3_event.preventDefault();
 
-	            container
-	                .on('scroll.combo-scroll', render, true);
-	        }
+	    var disabled = _operation.disabled();
 
+	    if (disabled) {
+	      context.ui().flash.duration(4000).iconName('#iD-operation-' + _operation.id).iconClass('operation disabled').label(_operation.tooltip)();
+	    } else {
+	      context.ui().flash.duration(2000).iconName('#iD-operation-' + _operation.id).iconClass('operation').label(_operation.annotation() || _operation.title)();
+	      if (_operation.point) _operation.point(null);
 
-	        function hide() {
-	            if (_comboHideTimerID) {
-	                window.clearTimeout(_comboHideTimerID);
-	                _comboHideTimerID = undefined;
-	            }
+	      _operation();
+	    }
+	  }
 
-	            container.selectAll('.combobox')
-	                .remove();
+	  function behavior() {
+	    if (_operation && _operation.available()) {
+	      context.keybinding().on(_operation.keys, keypress);
+	    }
 
-	            container
-	                .on('scroll.combo-scroll', null);
-	        }
+	    return behavior;
+	  }
 
+	  behavior.off = function () {
+	    context.keybinding().off(_operation.keys);
+	  };
 
-	        function keydown() {
-	            var shown = !container.selectAll('.combobox').empty();
-	            var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
+	  behavior.which = function (_) {
+	    if (!arguments.length) return _operation;
+	    _operation = _;
+	    return behavior;
+	  };
 
-	            switch (event.keyCode) {
-	                case 8:   // ⌫ Backspace
-	                case 46:  // ⌦ Delete
-	                    event.stopPropagation();
-	                    _selected = null;
-	                    render();
-	                    input.on('input.combo-input', function() {
-	                        var start = input.property('selectionStart');
-	                        input.node().setSelectionRange(start, start);
-	                        input.on('input.combo-input', change);
-	                    });
-	                    break;
-
-	                case 9:   // ⇥ Tab
-	                    accept();
-	                    break;
-
-	                case 13:  // ↩ Return
-	                    event.preventDefault();
-	                    event.stopPropagation();
-	                    break;
-
-	                case 38:  // ↑ Up arrow
-	                    if (tagName === 'textarea' && !shown) { return; }
-	                    event.preventDefault();
-	                    if (tagName === 'input' && !shown) {
-	                        show();
-	                    }
-	                    nav(-1);
-	                    break;
-
-	                case 40:  // ↓ Down arrow
-	                    if (tagName === 'textarea' && !shown) { return; }
-	                    event.preventDefault();
-	                    if (tagName === 'input' && !shown) {
-	                        show();
-	                    }
-	                    nav(+1);
-	                    break;
-	            }
-	        }
+	  return behavior;
+	}
 
+	function operationCircularize(context, selectedIDs) {
+	  var _extent;
 
-	        function keyup() {
-	            switch (event.keyCode) {
-	                case 27:  // ⎋ Escape
-	                    cancel();
-	                    break;
+	  var _actions = selectedIDs.map(getAction).filter(Boolean);
 
-	                case 13:  // ↩ Return
-	                    accept();
-	                    break;
-	            }
-	        }
+	  var _amount = _actions.length === 1 ? 'single' : 'multiple';
 
+	  var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+	    return n.loc;
+	  });
 
-	        // Called whenever the input value is changed (e.g. on typing)
-	        function change() {
-	            fetchComboData(value(), function() {
-	                _selected = null;
-	                var val = input.property('value');
+	  function getAction(entityID) {
+	    var entity = context.entity(entityID);
+	    if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) return null;
 
-	                if (_suggestions.length) {
-	                    if (input.property('selectionEnd') === val.length) {
-	                        _selected = tryAutocomplete();
-	                    }
+	    if (!_extent) {
+	      _extent = entity.extent(context.graph());
+	    } else {
+	      _extent = _extent.extend(entity.extent(context.graph()));
+	    }
 
-	                    if (!_selected) {
-	                        _selected = val;
-	                    }
-	                }
+	    return actionCircularize(entityID, context.projection);
+	  }
 
-	                if (val.length) {
-	                    var combo = container.selectAll('.combobox');
-	                    if (combo.empty()) {
-	                        show();
-	                    }
-	                } else {
-	                    hide();
-	                }
+	  var operation = function operation() {
+	    if (!_actions.length) return;
 
-	                render();
-	            });
+	    var combinedAction = function combinedAction(graph, t) {
+	      _actions.forEach(function (action) {
+	        if (!action.disabled(graph)) {
+	          graph = action(graph, t);
 	        }
+	      });
 
+	      return graph;
+	    };
 
-	        // Called when the user presses up/down arrows to navigate the list
-	        function nav(dir) {
-	            if (_suggestions.length) {
-	                // try to determine previously selected index..
-	                var index = -1;
-	                for (var i = 0; i < _suggestions.length; i++) {
-	                    if (_selected && _suggestions[i].value === _selected) {
-	                        index = i;
-	                        break;
-	                    }
-	                }
-
-	                // pick new _selected
-	                index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
-	                _selected = _suggestions[index].value;
-	                input.property('value', _selected);
-	            }
+	    combinedAction.transitionable = true;
+	    context.perform(combinedAction, operation.annotation());
+	    window.setTimeout(function () {
+	      context.validator().validate();
+	    }, 300); // after any transition
+	  };
 
-	            render();
-	            ensureVisible();
-	        }
+	  operation.available = function () {
+	    return _actions.length && selectedIDs.length === _actions.length;
+	  }; // don't cache this because the visible extent could change
 
 
-	        function ensureVisible() {
-	            var combo = container.selectAll('.combobox');
-	            if (combo.empty()) { return; }
+	  operation.disabled = function () {
+	    if (!_actions.length) return '';
 
-	            var containerRect = container.node().getBoundingClientRect();
-	            var comboRect = combo.node().getBoundingClientRect();
+	    var actionDisableds = _actions.map(function (action) {
+	      return action.disabled(context.graph());
+	    }).filter(Boolean);
 
-	            if (comboRect.bottom > containerRect.bottom) {
-	                var node = attachTo ? attachTo.node() : input.node();
-	                node.scrollIntoView({ behavior: 'instant', block: 'center' });
-	                render();
-	            }
+	    if (actionDisableds.length === _actions.length) {
+	      // none of the features can be circularized
+	      if (new Set(actionDisableds).size > 1) {
+	        return 'multiple_blockers';
+	      }
 
-	            // https://stackoverflow.com/questions/11039885/scrollintoview-causing-the-whole-page-to-move
-	            var selected = combo.selectAll('.combobox-option.selected').node();
-	            if (selected) {
-	                selected.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
-	            }
-	        }
+	      return actionDisableds[0];
+	    } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    }
 
+	    return false;
 
-	        function value() {
-	            var value = input.property('value');
-	            var start = input.property('selectionStart');
-	            var end = input.property('selectionEnd');
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	            if (start && end) {
-	                value = value.substring(0, start);
-	            }
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	            return value;
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
 	        }
+	      }
 
+	      return false;
+	    }
+	  };
 
-	        function fetchComboData(v, cb) {
-	            _cancelFetch = false;
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.circularize.' + disable + '.' + _amount) : _t('operations.circularize.description.' + _amount);
+	  };
 
-	            _fetcher.call(input, v, function(results) {
-	                // already chose a value, don't overwrite or autocomplete it
-	                if (_cancelFetch) { return; }
+	  operation.annotation = function () {
+	    return _t('operations.circularize.annotation.feature', {
+	      n: _actions.length
+	    });
+	  };
 
-	                _suggestions = results;
-	                results.forEach(function(d) { _fetched[d.value] = d; });
+	  operation.id = 'circularize';
+	  operation.keys = [_t('operations.circularize.key')];
+	  operation.title = _t('operations.circularize.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	                if (cb) {
-	                    cb();
-	                }
-	            });
-	        }
+	// For example, ⌘Z -> Ctrl+Z
 
+	var uiCmd = function uiCmd(code) {
+	  var detected = utilDetect();
 
-	        function tryAutocomplete() {
-	            if (!_canAutocomplete) { return; }
+	  if (detected.os === 'mac') {
+	    return code;
+	  }
 
-	            var val = _caseSensitive ? value() : value().toLowerCase();
-	            if (!val) { return; }
+	  if (detected.os === 'win') {
+	    if (code === '⌘⇧Z') return 'Ctrl+Y';
+	  }
 
-	            // Don't autocomplete if user is typing a number - #4935
-	            if (!isNaN(parseFloat(val)) && isFinite(val)) { return; }
+	  var result = '',
+	      replacements = {
+	    '⌘': 'Ctrl',
+	    '⇧': 'Shift',
+	    '⌥': 'Alt',
+	    '⌫': 'Backspace',
+	    '⌦': 'Delete'
+	  };
 
-	            var bestIndex = -1;
-	            for (var i = 0; i < _suggestions.length; i++) {
-	                var suggestion = _suggestions[i].value;
-	                var compare = _caseSensitive ? suggestion : suggestion.toLowerCase();
+	  for (var i = 0; i < code.length; i++) {
+	    if (code[i] in replacements) {
+	      result += replacements[code[i]] + (i < code.length - 1 ? '+' : '');
+	    } else {
+	      result += code[i];
+	    }
+	  }
 
-	                // if search string matches suggestion exactly, pick it..
-	                if (compare === val) {
-	                    bestIndex = i;
-	                    break;
+	  return result;
+	}; // return a display-focused string for a given keyboard code
 
-	                // otherwise lock in the first result that starts with the search string..
-	                } else if (bestIndex === -1 && compare.indexOf(val) === 0) {
-	                    bestIndex = i;
-	                }
-	            }
+	uiCmd.display = function (code) {
+	  if (code.length !== 1) return code;
+	  var detected = utilDetect();
+	  var mac = detected.os === 'mac';
+	  var replacements = {
+	    '⌘': mac ? '⌘ ' + _t('shortcuts.key.cmd') : _t('shortcuts.key.ctrl'),
+	    '⇧': mac ? '⇧ ' + _t('shortcuts.key.shift') : _t('shortcuts.key.shift'),
+	    '⌥': mac ? '⌥ ' + _t('shortcuts.key.option') : _t('shortcuts.key.alt'),
+	    '⌃': mac ? '⌃ ' + _t('shortcuts.key.ctrl') : _t('shortcuts.key.ctrl'),
+	    '⌫': mac ? '⌫ ' + _t('shortcuts.key.delete') : _t('shortcuts.key.backspace'),
+	    '⌦': mac ? '⌦ ' + _t('shortcuts.key.del') : _t('shortcuts.key.del'),
+	    '↖': mac ? '↖ ' + _t('shortcuts.key.pgup') : _t('shortcuts.key.pgup'),
+	    '↘': mac ? '↘ ' + _t('shortcuts.key.pgdn') : _t('shortcuts.key.pgdn'),
+	    '⇞': mac ? '⇞ ' + _t('shortcuts.key.home') : _t('shortcuts.key.home'),
+	    '⇟': mac ? '⇟ ' + _t('shortcuts.key.end') : _t('shortcuts.key.end'),
+	    '↵': mac ? '⏎ ' + _t('shortcuts.key.return') : _t('shortcuts.key.enter'),
+	    '⎋': mac ? '⎋ ' + _t('shortcuts.key.esc') : _t('shortcuts.key.esc'),
+	    '☰': mac ? '☰ ' + _t('shortcuts.key.menu') : _t('shortcuts.key.menu')
+	  };
+	  return replacements[code] || code;
+	};
 
-	            if (bestIndex !== -1) {
-	                var bestVal = _suggestions[bestIndex].value;
-	                input.property('value', bestVal);
-	                input.node().setSelectionRange(val.length, bestVal.length);
-	                return bestVal;
-	            }
+	function operationDelete(context, selectedIDs) {
+	  var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	  var action = actionDeleteMultiple(selectedIDs);
+	  var nodes = utilGetAllNodes(selectedIDs, context.graph());
+	  var coords = nodes.map(function (n) {
+	    return n.loc;
+	  });
+	  var extent = utilTotalExtent(selectedIDs, context.graph());
+
+	  var operation = function operation() {
+	    var nextSelectedID;
+	    var nextSelectedLoc;
+
+	    if (selectedIDs.length === 1) {
+	      var id = selectedIDs[0];
+	      var entity = context.entity(id);
+	      var geometry = entity.geometry(context.graph());
+	      var parents = context.graph().parentWays(entity);
+	      var parent = parents[0]; // Select the next closest node in the way.
+
+	      if (geometry === 'vertex') {
+	        var nodes = parent.nodes;
+	        var i = nodes.indexOf(id);
+
+	        if (i === 0) {
+	          i++;
+	        } else if (i === nodes.length - 1) {
+	          i--;
+	        } else {
+	          var a = geoSphericalDistance(entity.loc, context.entity(nodes[i - 1]).loc);
+	          var b = geoSphericalDistance(entity.loc, context.entity(nodes[i + 1]).loc);
+	          i = a < b ? i - 1 : i + 1;
 	        }
 
+	        nextSelectedID = nodes[i];
+	        nextSelectedLoc = context.entity(nextSelectedID).loc;
+	      }
+	    }
 
-	        function render() {
-	            if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
-	                hide();
-	                return;
-	            }
+	    context.perform(action, operation.annotation());
+	    context.validator().validate();
 
-	            var shown = !container.selectAll('.combobox').empty();
-	            if (!shown) { return; }
-
-	            var combo = container.selectAll('.combobox');
-	            var options = combo.selectAll('.combobox-option')
-	                .data(_suggestions, function(d) { return d.value; });
-
-	            options.exit()
-	                .remove();
-
-	            // enter/update
-	            options.enter()
-	                .append('a')
-	                .attr('class', 'combobox-option')
-	                .attr('title', function(d) { return d.title; })
-	                .text(function(d) { return d.display || d.value; })
-	                .on('mouseenter', _mouseEnterHandler)
-	                .on('mouseleave', _mouseLeaveHandler)
-	                .merge(options)
-	                .classed('selected', function(d) { return d.value === _selected; })
-	                .on('click.combo-option', accept)
-	                .order();
-
-	            var node = attachTo ? attachTo.node() : input.node();
-	            var containerRect = container.node().getBoundingClientRect();
-	            var rect = node.getBoundingClientRect();
-
-	            combo
-	                .style('left', (rect.left + 5 - containerRect.left) + 'px')
-	                .style('width', (rect.width - 10) + 'px')
-	                .style('top', (rect.height + rect.top - containerRect.top) + 'px');
-	        }
-
-
-	        // Dispatches an 'accept' event
-	        // Then hides the combobox.
-	        function accept(d) {
-	            _cancelFetch = true;
-	            var thiz = input.node();
-
-	            if (d) {   // user clicked on a suggestion
-	                utilGetSetValue(input, d.value);    // replace field contents
-	                utilTriggerEvent(input, 'change');
-	            }
+	    if (nextSelectedID && nextSelectedLoc) {
+	      if (context.hasEntity(nextSelectedID)) {
+	        context.enter(modeSelect(context, [nextSelectedID]).follow(true));
+	      } else {
+	        context.map().centerEase(nextSelectedLoc);
+	        context.enter(modeBrowse(context));
+	      }
+	    } else {
+	      context.enter(modeBrowse(context));
+	    }
+	  };
 
-	            // clear (and keep) selection
-	            var val = utilGetSetValue(input);
-	            thiz.setSelectionRange(val.length, val.length);
+	  operation.available = function () {
+	    return true;
+	  };
 
-	            d = _fetched[val];
-	            dispatch$1.call('accept', thiz, d, val);
-	            hide();
-	        }
+	  operation.disabled = function () {
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    } else if (selectedIDs.some(protectedMember)) {
+	      return 'part_of_relation';
+	    } else if (selectedIDs.some(incompleteRelation)) {
+	      return 'incomplete_relation';
+	    } else if (selectedIDs.some(hasWikidataTag)) {
+	      return 'has_wikidata_tag';
+	    }
 
+	    return false;
 
-	        // Dispatches an 'cancel' event
-	        // Then hides the combobox.
-	        function cancel() {
-	            _cancelFetch = true;
-	            var thiz = input.node();
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	            // clear (and remove) selection, and replace field contents
-	            var val = utilGetSetValue(input);
-	            var start = input.property('selectionStart');
-	            var end = input.property('selectionEnd');
-	            val = val.slice(0, start) + val.slice(end);
-	            utilGetSetValue(input, val);
-	            thiz.setSelectionRange(val.length, val.length);
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	            dispatch$1.call('cancel', thiz);
-	            hide();
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
 	        }
+	      }
 
-	    };
+	      return false;
+	    }
 
+	    function hasWikidataTag(id) {
+	      var entity = context.entity(id);
+	      return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+	    }
 
-	    combobox.canAutocomplete = function(val) {
-	        if (!arguments.length) { return _canAutocomplete; }
-	        _canAutocomplete = val;
-	        return combobox;
-	    };
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
 
-	    combobox.caseSensitive = function(val) {
-	        if (!arguments.length) { return _caseSensitive; }
-	        _caseSensitive = val;
-	        return combobox;
-	    };
+	    function protectedMember(id) {
+	      var entity = context.entity(id);
+	      if (entity.type !== 'way') return false;
+	      var parents = context.graph().parentRelations(entity);
 
-	    combobox.data = function(val) {
-	        if (!arguments.length) { return _data; }
-	        _data = val;
-	        return combobox;
-	    };
+	      for (var i = 0; i < parents.length; i++) {
+	        var parent = parents[i];
+	        var type = parent.tags.type;
+	        var role = parent.memberById(id).role || 'outer';
 
-	    combobox.fetcher = function(val) {
-	        if (!arguments.length) { return _fetcher; }
-	        _fetcher = val;
-	        return combobox;
-	    };
+	        if (type === 'route' || type === 'boundary' || type === 'multipolygon' && role === 'outer') {
+	          return true;
+	        }
+	      }
 
-	    combobox.minItems = function(val) {
-	        if (!arguments.length) { return _minItems; }
-	        _minItems = val;
-	        return combobox;
-	    };
+	      return false;
+	    }
+	  };
 
-	    combobox.itemsMouseEnter = function(val) {
-	        if (!arguments.length) { return _mouseEnterHandler; }
-	        _mouseEnterHandler = val;
-	        return combobox;
-	    };
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.delete.' + disable + '.' + multi) : _t('operations.delete.description.' + multi);
+	  };
 
-	    combobox.itemsMouseLeave = function(val) {
-	        if (!arguments.length) { return _mouseLeaveHandler; }
-	        _mouseLeaveHandler = val;
-	        return combobox;
-	    };
+	  operation.annotation = function () {
+	    return selectedIDs.length === 1 ? _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.delete.annotation.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	    return utilRebind(combobox, dispatch$1, 'on');
+	  operation.id = 'delete';
+	  operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
+	  operation.title = _t('operations.delete.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
+	function operationOrthogonalize(context, selectedIDs) {
+	  var _extent;
 
-	uiCombobox.off = function(input, context) {
-	    input
-	        .on('focus.combo-input', null)
-	        .on('blur.combo-input', null)
-	        .on('keydown.combo-input', null)
-	        .on('keyup.combo-input', null)
-	        .on('input.combo-input', null)
-	        .on('mousedown.combo-input', null)
-	        .on('mouseup.combo-input', null);
-
+	  var _type;
 
-	    context.container()
-	        .on('scroll.combo-scroll', null);
-	};
+	  var _actions = selectedIDs.map(chooseAction).filter(Boolean);
 
-	// toggles the visibility of ui elements, using a combination of the
-	// hide class, which sets display=none, and a d3 transition for opacity.
-	// this will cause blinking when called repeatedly, so check that the
-	// value actually changes between calls.
-	function uiToggle(show, callback) {
-	    return function(selection) {
-	        selection
-	            .style('opacity', show ? 0 : 1)
-	            .classed('hide', false)
-	            .transition()
-	            .style('opacity', show ? 1 : 0)
-	            .on('end', function() {
-	                select(this)
-	                    .classed('hide', !show)
-	                    .style('opacity', null);
-	                if (callback) { callback.apply(this); }
-	            });
-	    };
-	}
+	  var _amount = _actions.length === 1 ? 'single' : 'multiple';
 
-	function uiDisclosure(context, key, expandedDefault) {
-	    var dispatch$1 = dispatch('toggled');
-	    var _expanded;
-	    var _title = utilFunctor('');
-	    var _updatePreference = true;
-	    var _content = function () {};
+	  var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+	    return n.loc;
+	  });
 
+	  function chooseAction(entityID) {
+	    var entity = context.entity(entityID);
+	    var geometry = entity.geometry(context.graph());
 
-	    var disclosure = function(selection) {
+	    if (!_extent) {
+	      _extent = entity.extent(context.graph());
+	    } else {
+	      _extent = _extent.extend(entity.extent(context.graph()));
+	    } // square a line/area
 
-	        if (_expanded === undefined || _expanded === null) {
-	            // loading _expanded here allows it to be reset by calling `disclosure.expanded(null)`
 
-	            var preference = corePreferences('disclosure.' + key + '.expanded');
-	            _expanded = preference === null ? !!expandedDefault : (preference === 'true');
-	        }
+	    if (entity.type === 'way' && new Set(entity.nodes).size > 2) {
+	      if (_type && _type !== 'feature') return null;
+	      _type = 'feature';
+	      return actionOrthogonalize(entityID, context.projection); // square a single vertex
+	    } else if (geometry === 'vertex') {
+	      if (_type && _type !== 'corner') return null;
+	      _type = 'corner';
+	      var graph = context.graph();
+	      var parents = graph.parentWays(entity);
 
-	        var hideToggle = selection.selectAll('.hide-toggle-' + key)
-	            .data([0]);
+	      if (parents.length === 1) {
+	        var way = parents[0];
 
-	        // enter
-	        var hideToggleEnter = hideToggle.enter()
-	            .append('a')
-	            .attr('href', '#')
-	            .attr('class', 'hide-toggle hide-toggle-' + key)
-	            .call(svgIcon('', 'pre-text', 'hide-toggle-icon'));
+	        if (way.nodes.indexOf(entityID) !== -1) {
+	          return actionOrthogonalize(way.id, context.projection, entityID);
+	        }
+	      }
+	    }
 
-	        hideToggleEnter
-	            .append('span')
-	            .attr('class', 'hide-toggle-text');
+	    return null;
+	  }
 
-	        // update
-	        hideToggle = hideToggleEnter
-	            .merge(hideToggle);
+	  var operation = function operation() {
+	    if (!_actions.length) return;
 
-	        hideToggle
-	            .on('click', toggle)
-	            .classed('expanded', _expanded);
+	    var combinedAction = function combinedAction(graph, t) {
+	      _actions.forEach(function (action) {
+	        if (!action.disabled(graph)) {
+	          graph = action(graph, t);
+	        }
+	      });
 
-	        hideToggle.selectAll('.hide-toggle-text')
-	            .text(_title());
+	      return graph;
+	    };
 
-	        hideToggle.selectAll('.hide-toggle-icon')
-	            .attr('xlink:href', _expanded ? '#iD-icon-down'
-	                : (_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-backward' : '#iD-icon-forward'
-	            );
+	    combinedAction.transitionable = true;
+	    context.perform(combinedAction, operation.annotation());
+	    window.setTimeout(function () {
+	      context.validator().validate();
+	    }, 300); // after any transition
+	  };
 
+	  operation.available = function () {
+	    return _actions.length && selectedIDs.length === _actions.length;
+	  }; // don't cache this because the visible extent could change
 
-	        var wrap = selection.selectAll('.disclosure-wrap')
-	            .data([0]);
 
-	        // enter/update
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'disclosure-wrap disclosure-wrap-' + key)
-	            .merge(wrap)
-	            .classed('hide', !_expanded);
+	  operation.disabled = function () {
+	    if (!_actions.length) return '';
 
-	        if (_expanded) {
-	            wrap
-	                .call(_content);
-	        }
+	    var actionDisableds = _actions.map(function (action) {
+	      return action.disabled(context.graph());
+	    }).filter(Boolean);
 
+	    if (actionDisableds.length === _actions.length) {
+	      // none of the features can be squared
+	      if (new Set(actionDisableds).size > 1) {
+	        return 'multiple_blockers';
+	      }
 
-	        function toggle() {
-	            event.preventDefault();
+	      return actionDisableds[0];
+	    } else if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    }
 
-	            _expanded = !_expanded;
+	    return false;
 
-	            if (_updatePreference) {
-	                corePreferences('disclosure.' + key + '.expanded', _expanded);
-	            }
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	            hideToggle
-	                .classed('expanded', _expanded);
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	            hideToggle.selectAll('.hide-toggle-icon')
-	                .attr('xlink:href', _expanded ? '#iD-icon-down'
-	                    : (_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-backward' : '#iD-icon-forward'
-	                );
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	            wrap
-	                .call(uiToggle(_expanded));
+	      return false;
+	    }
+	  };
 
-	            if (_expanded) {
-	                wrap
-	                    .call(_content);
-	            }
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.orthogonalize.' + disable + '.' + _amount) : _t('operations.orthogonalize.description.' + _type + '.' + _amount);
+	  };
 
-	            dispatch$1.call('toggled', this, _expanded);
-	        }
-	    };
+	  operation.annotation = function () {
+	    return _t('operations.orthogonalize.annotation.' + _type, {
+	      n: _actions.length
+	    });
+	  };
 
+	  operation.id = 'orthogonalize';
+	  operation.keys = [_t('operations.orthogonalize.key')];
+	  operation.title = _t('operations.orthogonalize.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	    disclosure.title = function(val) {
-	        if (!arguments.length) { return _title; }
-	        _title = utilFunctor(val);
-	        return disclosure;
-	    };
+	function operationReflectShort(context, selectedIDs) {
+	  return operationReflect(context, selectedIDs, 'short');
+	}
+	function operationReflectLong(context, selectedIDs) {
+	  return operationReflect(context, selectedIDs, 'long');
+	}
+	function operationReflect(context, selectedIDs, axis) {
+	  axis = axis || 'long';
+	  var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	  var nodes = utilGetAllNodes(selectedIDs, context.graph());
+	  var coords = nodes.map(function (n) {
+	    return n.loc;
+	  });
+	  var extent = utilTotalExtent(selectedIDs, context.graph());
 
+	  var operation = function operation() {
+	    var action = actionReflect(selectedIDs, context.projection).useLongAxis(Boolean(axis === 'long'));
+	    context.perform(action, operation.annotation());
+	    window.setTimeout(function () {
+	      context.validator().validate();
+	    }, 300); // after any transition
+	  };
 
-	    disclosure.expanded = function(val) {
-	        if (!arguments.length) { return _expanded; }
-	        _expanded = val;
-	        return disclosure;
-	    };
+	  operation.available = function () {
+	    return nodes.length >= 3;
+	  }; // don't cache this because the visible extent could change
 
 
-	    disclosure.updatePreference = function(val) {
-	        if (!arguments.length) { return _updatePreference; }
-	        _updatePreference = val;
-	        return disclosure;
-	    };
+	  operation.disabled = function () {
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    } else if (selectedIDs.some(incompleteRelation)) {
+	      return 'incomplete_relation';
+	    }
 
+	    return false;
 
-	    disclosure.content = function(val) {
-	        if (!arguments.length) { return _content; }
-	        _content = val;
-	        return disclosure;
-	    };
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	    return utilRebind(disclosure, dispatch$1, 'on');
-	}
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	// A unit of controls or info to be used in a layout, such as within a pane.
-	// Can be labeled and collapsible.
-	function uiSection(id, context) {
+	      return false;
+	    }
 
-	    var _classes = utilFunctor('');
-	    var _shouldDisplay;
-	    var _content;
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
+	  };
 
-	    var _disclosure;
-	    var _title;
-	    var _expandedByDefault = utilFunctor(true);
-	    var _disclosureContent;
-	    var _disclosureExpanded;
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.reflect.' + disable + '.' + multi) : _t('operations.reflect.description.' + axis + '.' + multi);
+	  };
 
-	    var _containerSelection = select(null);
+	  operation.annotation = function () {
+	    return _t('operations.reflect.annotation.' + axis + '.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	    var section = {
-	        id: id
-	    };
+	  operation.id = 'reflect-' + axis;
+	  operation.keys = [_t('operations.reflect.key.' + axis)];
+	  operation.title = _t('operations.reflect.title.' + axis);
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	    section.classes = function(val) {
-	        if (!arguments.length) { return _classes; }
-	        _classes = utilFunctor(val);
-	        return section;
-	    };
+	function operationMove(context, selectedIDs) {
+	  var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	  var nodes = utilGetAllNodes(selectedIDs, context.graph());
+	  var coords = nodes.map(function (n) {
+	    return n.loc;
+	  });
+	  var extent = utilTotalExtent(selectedIDs, context.graph());
 
-	    section.title = function(val) {
-	        if (!arguments.length) { return _title; }
-	        _title = utilFunctor(val);
-	        return section;
-	    };
+	  var operation = function operation() {
+	    context.enter(modeMove(context, selectedIDs));
+	  };
 
-	    section.expandedByDefault = function(val) {
-	        if (!arguments.length) { return _expandedByDefault; }
-	        _expandedByDefault = utilFunctor(val);
-	        return section;
-	    };
+	  operation.available = function () {
+	    return selectedIDs.length > 0;
+	  };
 
-	    section.shouldDisplay = function(val) {
-	        if (!arguments.length) { return _shouldDisplay; }
-	        _shouldDisplay = utilFunctor(val);
-	        return section;
-	    };
+	  operation.disabled = function () {
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    } else if (selectedIDs.some(incompleteRelation)) {
+	      return 'incomplete_relation';
+	    }
 
-	    section.content = function(val) {
-	        if (!arguments.length) { return _content; }
-	        _content = val;
-	        return section;
-	    };
+	    return false;
 
-	    section.disclosureContent = function(val) {
-	        if (!arguments.length) { return _disclosureContent; }
-	        _disclosureContent = val;
-	        return section;
-	    };
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	    section.disclosureExpanded = function(val) {
-	        if (!arguments.length) { return _disclosureExpanded; }
-	        _disclosureExpanded = val;
-	        return section;
-	    };
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	    // may be called multiple times
-	    section.render = function(selection) {
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	        _containerSelection = selection
-	            .selectAll('.section-' + id)
-	            .data([0]);
+	      return false;
+	    }
 
-	        var sectionEnter = _containerSelection
-	            .enter()
-	            .append('div')
-	            .attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
+	  };
 
-	        _containerSelection = sectionEnter
-	            .merge(_containerSelection);
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.move.' + disable + '.' + multi) : _t('operations.move.description.' + multi);
+	  };
 
-	        _containerSelection
-	            .call(renderContent);
-	    };
+	  operation.annotation = function () {
+	    return selectedIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.move.annotation.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	    section.reRender = function() {
-	        _containerSelection
-	            .call(renderContent);
-	    };
+	  operation.id = 'move';
+	  operation.keys = [_t('operations.move.key')];
+	  operation.title = _t('operations.move.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  operation.mouseOnly = true;
+	  return operation;
+	}
 
-	    section.selection = function() {
-	        return _containerSelection;
-	    };
+	function modeRotate(context, entityIDs) {
+	  var _tolerancePx = 4; // see also behaviorDrag, behaviorSelect, modeMove
 
-	    section.disclosure = function() {
-	        return _disclosure;
-	    };
+	  var mode = {
+	    id: 'rotate',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('rotate');
+	  var behaviors = [behaviorEdit(context), operationCircularize(context, entityIDs).behavior, operationDelete(context, entityIDs).behavior, operationMove(context, entityIDs).behavior, operationOrthogonalize(context, entityIDs).behavior, operationReflectLong(context, entityIDs).behavior, operationReflectShort(context, entityIDs).behavior];
+	  var annotation = entityIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(entityIDs[0])) : _t('operations.rotate.annotation.feature', {
+	    n: entityIDs.length
+	  });
 
-	    // may be called multiple times
-	    function renderContent(selection) {
-	        if (_shouldDisplay) {
-	            var shouldDisplay = _shouldDisplay();
-	            selection.classed('hide', !shouldDisplay);
-	            if (!shouldDisplay) {
-	                selection.html('');
-	                return;
-	            }
-	        }
+	  var _prevGraph;
 
-	        if (_disclosureContent) {
-	            if (!_disclosure) {
-	                _disclosure = uiDisclosure(context, id.replace(/-/g, '_'), _expandedByDefault())
-	                    .title(_title || '')
-	                    /*.on('toggled', function(expanded) {
-	                        if (expanded) { selection.node().parentNode.scrollTop += 200; }
-	                    })*/
-	                    .content(_disclosureContent);
-	            }
-	            if (_disclosureExpanded !== undefined) {
-	                _disclosure.expanded(_disclosureExpanded);
-	                _disclosureExpanded = undefined;
-	            }
-	            selection
-	                .call(_disclosure);
+	  var _prevAngle;
 
-	            return;
-	        }
+	  var _prevTransform;
 
-	        if (_content) {
-	            selection
-	                .call(_content);
-	        }
-	    }
+	  var _pivot; // use pointer events on supported platforms; fallback to mouse events
 
-	    return section;
-	}
 
-	// Pass `which` object of the form:
-	// {
-	//   key: 'string',     // required
-	//   value: 'string'    // optional
-	// }
-	//   -or-
-	// {
-	//   rtype: 'string'    // relation type  (e.g. 'multipolygon')
-	// }
-	//   -or-
-	// {
-	//   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
-	// }
-	//
-	function uiTagReference(what) {
-	    var wikibase = what.qid ? services.wikidata : services.osmWikibase;
-	    var tagReference = {};
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	    var _button = select(null);
-	    var _body = select(null);
-	    var _loaded;
-	    var _showing;
+	  function doRotate(d3_event) {
+	    var fn;
 
+	    if (context.graph() !== _prevGraph) {
+	      fn = context.perform;
+	    } else {
+	      fn = context.replace;
+	    } // projection changed, recalculate _pivot
 
-	    function load() {
-	        if (!wikibase) { return; }
 
-	        _button
-	            .classed('tag-reference-loading', true);
+	    var projection = context.projection;
+	    var currTransform = projection.transform();
 
-	        wikibase.getDocs(what, gotDocs);
+	    if (!_prevTransform || currTransform.k !== _prevTransform.k || currTransform.x !== _prevTransform.x || currTransform.y !== _prevTransform.y) {
+	      var nodes = utilGetAllNodes(entityIDs, context.graph());
+	      var points = nodes.map(function (n) {
+	        return projection(n.loc);
+	      });
+	      _pivot = getPivot(points);
+	      _prevAngle = undefined;
 	    }
 
+	    var currMouse = context.map().mouse(d3_event);
+	    var currAngle = Math.atan2(currMouse[1] - _pivot[1], currMouse[0] - _pivot[0]);
+	    if (typeof _prevAngle === 'undefined') _prevAngle = currAngle;
+	    var delta = currAngle - _prevAngle;
+	    fn(actionRotate(entityIDs, _pivot, delta, projection));
+	    _prevTransform = currTransform;
+	    _prevAngle = currAngle;
+	    _prevGraph = context.graph();
+	  }
 
-	    function gotDocs(err, docs) {
-	        _body.html('');
+	  function getPivot(points) {
+	    var _pivot;
 
-	        if (!docs || !docs.title) {
-	            _body
-	                .append('p')
-	                .attr('class', 'tag-reference-description')
-	                .text(_t('inspector.no_documentation_key'));
-	            done();
-	            return;
-	        }
+	    if (points.length === 1) {
+	      _pivot = points[0];
+	    } else if (points.length === 2) {
+	      _pivot = geoVecInterp(points[0], points[1], 0.5);
+	    } else {
+	      var polygonHull = d3_polygonHull(points);
 
-	        if (docs.imageURL) {
-	            _body
-	                .append('img')
-	                .attr('class', 'tag-reference-wiki-image')
-	                .attr('src', docs.imageURL)
-	                .on('load', function() { done(); })
-	                .on('error', function() { select(this).remove(); done(); });
-	        } else {
-	            done();
-	        }
-
-	        _body
-	            .append('p')
-	            .attr('class', 'tag-reference-description')
-	            .text(docs.description || _t('inspector.no_documentation_key'))
-	            .append('a')
-	            .attr('class', 'tag-reference-edit')
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .attr('title', _t('inspector.edit_reference'))
-	            .attr('href', docs.editURL)
-	            .call(svgIcon('#iD-icon-edit', 'inline'));
-
-	        if (docs.wiki) {
-	            _body
-	              .append('a')
-	              .attr('class', 'tag-reference-link')
-	              .attr('target', '_blank')
-	              .attr('tabindex', -1)
-	              .attr('href', docs.wiki.url)
-	              .call(svgIcon('#iD-icon-out-link', 'inline'))
-	              .append('span')
-	              .text(_t(docs.wiki.text));
-	        }
-
-	        // Add link to info about "good changeset comments" - #2923
-	        if (what.key === 'comment') {
-	            _body
-	                .append('a')
-	                .attr('class', 'tag-reference-comment-link')
-	                .attr('target', '_blank')
-	                .attr('tabindex', -1)
-	                .call(svgIcon('#iD-icon-out-link', 'inline'))
-	                .attr('href', _t('commit.about_changeset_comments_link'))
-	                .append('span')
-	                .text(_t('commit.about_changeset_comments'));
-	        }
+	      if (polygonHull.length === 2) {
+	        _pivot = geoVecInterp(points[0], points[1], 0.5);
+	      } else {
+	        _pivot = d3_polygonCentroid(d3_polygonHull(points));
+	      }
 	    }
 
+	    return _pivot;
+	  }
 
-	    function done() {
-	        _loaded = true;
+	  function finish(d3_event) {
+	    d3_event.stopPropagation();
+	    context.replace(actionNoop(), annotation);
+	    context.enter(modeSelect(context, entityIDs));
+	  }
 
-	        _button
-	            .classed('tag-reference-loading', false);
+	  function cancel() {
+	    if (_prevGraph) context.pop(); // remove the rotate
 
-	        _body
-	            .classed('expanded', true)
-	            .transition()
-	            .duration(200)
-	            .style('max-height', '200px')
-	            .style('opacity', '1');
+	    context.enter(modeSelect(context, entityIDs));
+	  }
 
-	        _showing = true;
+	  function undone() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	        _button.selectAll('svg.icon use').each(function() {
-	            var iconUse = select(this);
-	            if (iconUse.attr('href') === '#iD-icon-info') {
-	                iconUse.attr('href', '#iD-icon-info-filled');
-	            }
-	        });
-	    }
+	  mode.enter = function () {
+	    _prevGraph = null;
+	    context.features().forceVisible(entityIDs);
+	    behaviors.forEach(context.install);
+	    var downEvent;
+	    context.surface().on(_pointerPrefix + 'down.modeRotate', function (d3_event) {
+	      downEvent = d3_event;
+	    });
+	    select(window).on(_pointerPrefix + 'move.modeRotate', doRotate, true).on(_pointerPrefix + 'up.modeRotate', function (d3_event) {
+	      if (!downEvent) return;
+	      var mapNode = context.container().select('.main-map').node();
+	      var pointGetter = utilFastMouse(mapNode);
+	      var p1 = pointGetter(downEvent);
+	      var p2 = pointGetter(d3_event);
+	      var dist = geoVecLength(p1, p2);
+	      if (dist <= _tolerancePx) finish(d3_event);
+	      downEvent = null;
+	    }, true);
+	    context.history().on('undone.modeRotate', undone);
+	    keybinding.on('⎋', cancel).on('↩', finish);
+	    select(document).call(keybinding);
+	  };
 
+	  mode.exit = function () {
+	    behaviors.forEach(context.uninstall);
+	    context.surface().on(_pointerPrefix + 'down.modeRotate', null);
+	    select(window).on(_pointerPrefix + 'move.modeRotate', null, true).on(_pointerPrefix + 'up.modeRotate', null, true);
+	    context.history().on('undone.modeRotate', null);
+	    select(document).call(keybinding.unbind);
+	    context.features().forceVisible([]);
+	  };
 
-	    function hide() {
-	        _body
-	            .transition()
-	            .duration(200)
-	            .style('max-height', '0px')
-	            .style('opacity', '0')
-	            .on('end', function () {
-	                _body.classed('expanded', false);
-	            });
+	  mode.selectedIDs = function () {
+	    if (!arguments.length) return entityIDs; // no assign
+
+	    return mode;
+	  };
 
-	        _showing = false;
+	  return mode;
+	}
 
-	        _button.selectAll('svg.icon use').each(function() {
-	            var iconUse = select(this);
-	            if (iconUse.attr('href') === '#iD-icon-info-filled') {
-	                iconUse.attr('href', '#iD-icon-info');
-	            }
-	        });
+	function operationRotate(context, selectedIDs) {
+	  var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	  var nodes = utilGetAllNodes(selectedIDs, context.graph());
+	  var coords = nodes.map(function (n) {
+	    return n.loc;
+	  });
+	  var extent = utilTotalExtent(selectedIDs, context.graph());
+
+	  var operation = function operation() {
+	    context.enter(modeRotate(context, selectedIDs));
+	  };
+
+	  operation.available = function () {
+	    return nodes.length >= 2;
+	  };
 
+	  operation.disabled = function () {
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    } else if (selectedIDs.some(incompleteRelation)) {
+	      return 'incomplete_relation';
 	    }
 
+	    return false;
 
-	    tagReference.button = function(selection, klass, iconName) {
-	        _button = selection.selectAll('.tag-reference-button')
-	            .data([0]);
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	        _button = _button.enter()
-	            .append('button')
-	            .attr('class', 'tag-reference-button ' + klass)
-	            .attr('title', _t('icons.information'))
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-' + (iconName || 'inspect')))
-	            .merge(_button);
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	        _button
-	            .on('click', function () {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                this.blur();    // avoid keeping focus on the button - #4641
-	                if (_showing) {
-	                    hide();
-	                } else if (_loaded) {
-	                    done();
-	                } else {
-	                    load();
-	                }
-	            });
-	    };
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
+
+	      return false;
+	    }
 
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
+	  };
 
-	    tagReference.body = function(selection) {
-	        var itemID = what.qid || what.rtype || (what.key + '-' + what.value);
-	        _body = selection.selectAll('.tag-reference-body')
-	            .data([itemID], function(d) { return d; });
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.rotate.' + disable + '.' + multi) : _t('operations.rotate.description.' + multi);
+	  };
 
-	        _body.exit()
-	            .remove();
+	  operation.annotation = function () {
+	    return selectedIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.rotate.annotation.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	        _body = _body.enter()
-	            .append('div')
-	            .attr('class', 'tag-reference-body')
-	            .style('max-height', '0')
-	            .style('opacity', '0')
-	            .merge(_body);
+	  operation.id = 'rotate';
+	  operation.keys = [_t('operations.rotate.key')];
+	  operation.title = _t('operations.rotate.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  operation.mouseOnly = true;
+	  return operation;
+	}
 
-	        if (_showing === false) {
-	            hide();
-	        }
-	    };
+	function modeMove(context, entityIDs, baseGraph) {
+	  var _tolerancePx = 4; // see also behaviorDrag, behaviorSelect, modeRotate
 
+	  var mode = {
+	    id: 'move',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('move');
+	  var behaviors = [behaviorEdit(context), operationCircularize(context, entityIDs).behavior, operationDelete(context, entityIDs).behavior, operationOrthogonalize(context, entityIDs).behavior, operationReflectLong(context, entityIDs).behavior, operationReflectShort(context, entityIDs).behavior, operationRotate(context, entityIDs).behavior];
+	  var annotation = entityIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(entityIDs[0])) : _t('operations.move.annotation.feature', {
+	    n: entityIDs.length
+	  });
 
-	    tagReference.showing = function(val) {
-	        if (!arguments.length) { return _showing; }
-	        _showing = val;
-	        return tagReference;
-	    };
+	  var _prevGraph;
 
+	  var _cache;
 
-	    return tagReference;
-	}
+	  var _origin;
 
-	function uiSectionRawTagEditor(id, context) {
+	  var _nudgeInterval; // use pointer events on supported platforms; fallback to mouse events
 
-	    var section = uiSection(id, context)
-	        .classes('raw-tag-editor')
-	        .title(function() {
-	            var count = Object.keys(_tags).filter(function(d) { return d; }).length;
-	            return _t('inspector.title_count', { title: _t('inspector.tags'), count: count });
-	        })
-	        .expandedByDefault(false)
-	        .disclosureContent(renderDisclosureContent);
-
-	    var taginfo = services.taginfo;
-	    var dispatch$1 = dispatch('change');
-	    var availableViews = [
-	        { id: 'text', icon: '#fas-i-cursor' },
-	        { id: 'list', icon: '#fas-th-list' }
-	    ];
 
-	    var _tagView = (corePreferences('raw-tag-editor-view') || 'list');   // 'list, 'text'
-	    var _readOnlyTags = [];
-	    // the keys in the order we want them to display
-	    var _orderedKeys = [];
-	    var _showBlank = false;
-	    var _pendingChange = null;
-	    var _state;
-	    var _presets;
-	    var _tags;
-	    var _entityIDs;
-
-	    function renderDisclosureContent(wrap) {
-
-	        // remove deleted keys
-	        _orderedKeys = _orderedKeys.filter(function(key) {
-	            return _tags[key] !== undefined;
-	        });
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	        // When switching to a different entity or changing the state (hover/select)
-	        // reorder the keys alphabetically.
-	        // We trigger this by emptying the `_orderedKeys` array, then it will be rebuilt here.
-	        // Otherwise leave their order alone - #5857, #5927
-	        var all = Object.keys(_tags).sort();
-	        var missingKeys = utilArrayDifference(all, _orderedKeys);
-	        for (var i in missingKeys) {
-	            _orderedKeys.push(missingKeys[i]);
-	        }
+	  function doMove(nudge) {
+	    nudge = nudge || [0, 0];
+	    var fn;
 
-	        // assemble row data
-	        var rowData = _orderedKeys.map(function(key, i) {
-	            return { index: i, key: key, value: _tags[key] };
-	        });
+	    if (_prevGraph !== context.graph()) {
+	      _cache = {};
+	      _origin = context.map().mouseCoordinates();
+	      fn = context.perform;
+	    } else {
+	      fn = context.overwrite;
+	    }
 
-	        // append blank row last, if necessary
-	        if (!rowData.length || _showBlank) {
-	            _showBlank = false;
-	            rowData.push({ index: rowData.length, key: '', value: '' });
-	        }
+	    var currMouse = context.map().mouse();
+	    var origMouse = context.projection(_origin);
+	    var delta = geoVecSubtract(geoVecSubtract(currMouse, origMouse), nudge);
+	    fn(actionMove(entityIDs, delta, context.projection, _cache));
+	    _prevGraph = context.graph();
+	  }
+
+	  function startNudge(nudge) {
+	    if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+	    _nudgeInterval = window.setInterval(function () {
+	      context.map().pan(nudge);
+	      doMove(nudge);
+	    }, 50);
+	  }
 
+	  function stopNudge() {
+	    if (_nudgeInterval) {
+	      window.clearInterval(_nudgeInterval);
+	      _nudgeInterval = null;
+	    }
+	  }
 
-	        // View Options
-	        var options = wrap.selectAll('.raw-tag-options')
-	            .data([0]);
+	  function move() {
+	    doMove();
+	    var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
 
-	        options.exit()
-	            .remove();
+	    if (nudge) {
+	      startNudge(nudge);
+	    } else {
+	      stopNudge();
+	    }
+	  }
 
-	        var optionsEnter = options.enter()
-	            .insert('div', ':first-child')
-	            .attr('class', 'raw-tag-options');
+	  function finish(d3_event) {
+	    d3_event.stopPropagation();
+	    context.replace(actionNoop(), annotation);
+	    context.enter(modeSelect(context, entityIDs));
+	    stopNudge();
+	  }
 
-	        var optionEnter = optionsEnter.selectAll('.raw-tag-option')
-	            .data(availableViews, function(d) { return d.id; })
-	            .enter();
+	  function cancel() {
+	    if (baseGraph) {
+	      while (context.graph() !== baseGraph) {
+	        context.pop();
+	      } // reset to baseGraph
 
-	        optionEnter
-	            .append('button')
-	            .attr('class', function(d) {
-	                return 'raw-tag-option raw-tag-option-' + d.id + (_tagView === d.id ? ' selected' : '');
-	            })
-	            .attr('title', function(d) { return _t('icons.' + d.id); })
-	            .on('click', function(d) {
-	                _tagView = d.id;
-	                corePreferences('raw-tag-editor-view', d.id);
 
-	                wrap.selectAll('.raw-tag-option')
-	                    .classed('selected', function(datum) { return datum === d; });
+	      context.enter(modeBrowse(context));
+	    } else {
+	      if (_prevGraph) context.pop(); // remove the move
 
-	                wrap.selectAll('.tag-text')
-	                    .classed('hide', (d.id !== 'text'))
-	                    .each(setTextareaHeight);
+	      context.enter(modeSelect(context, entityIDs));
+	    }
 
-	                wrap.selectAll('.tag-list, .add-row')
-	                    .classed('hide', (d.id !== 'list'));
-	            })
-	            .each(function(d) {
-	                select(this)
-	                    .call(svgIcon(d.icon));
-	            });
+	    stopNudge();
+	  }
 
+	  function undone() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	        // View as Text
-	        var textData = rowsToText(rowData);
-	        var textarea = wrap.selectAll('.tag-text')
-	            .data([0]);
+	  mode.enter = function () {
+	    _origin = context.map().mouseCoordinates();
+	    _prevGraph = null;
+	    _cache = {};
+	    context.features().forceVisible(entityIDs);
+	    behaviors.forEach(context.install);
+	    var downEvent;
+	    context.surface().on(_pointerPrefix + 'down.modeMove', function (d3_event) {
+	      downEvent = d3_event;
+	    });
+	    select(window).on(_pointerPrefix + 'move.modeMove', move, true).on(_pointerPrefix + 'up.modeMove', function (d3_event) {
+	      if (!downEvent) return;
+	      var mapNode = context.container().select('.main-map').node();
+	      var pointGetter = utilFastMouse(mapNode);
+	      var p1 = pointGetter(downEvent);
+	      var p2 = pointGetter(d3_event);
+	      var dist = geoVecLength(p1, p2);
+	      if (dist <= _tolerancePx) finish(d3_event);
+	      downEvent = null;
+	    }, true);
+	    context.history().on('undone.modeMove', undone);
+	    keybinding.on('⎋', cancel).on('↩', finish);
+	    select(document).call(keybinding);
+	  };
 
-	        textarea = textarea.enter()
-	            .append('textarea')
-	            .attr('class', 'tag-text' + (_tagView !== 'text' ? ' hide' : ''))
-	            .call(utilNoAuto)
-	            .attr('placeholder', _t('inspector.key_value'))
-	            .attr('spellcheck', 'false')
-	            .merge(textarea);
+	  mode.exit = function () {
+	    stopNudge();
+	    behaviors.forEach(function (behavior) {
+	      context.uninstall(behavior);
+	    });
+	    context.surface().on(_pointerPrefix + 'down.modeMove', null);
+	    select(window).on(_pointerPrefix + 'move.modeMove', null, true).on(_pointerPrefix + 'up.modeMove', null, true);
+	    context.history().on('undone.modeMove', null);
+	    select(document).call(keybinding.unbind);
+	    context.features().forceVisible([]);
+	  };
 
-	        textarea
-	            .call(utilGetSetValue, textData)
-	            .each(setTextareaHeight)
-	            .on('input', setTextareaHeight)
-	            .on('blur', textChanged)
-	            .on('change', textChanged);
+	  mode.selectedIDs = function () {
+	    if (!arguments.length) return entityIDs; // no assign
 
+	    return mode;
+	  };
 
-	        // View as List
-	        var list = wrap.selectAll('.tag-list')
-	            .data([0]);
+	  return mode;
+	}
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'tag-list' + (_tagView !== 'list' ? ' hide' : ''))
-	            .merge(list);
+	function behaviorPaste(context) {
+	  function doPaste(d3_event) {
+	    // prevent paste during low zoom selection
+	    if (!context.map().withinEditableZoom()) return;
+	    d3_event.preventDefault();
+	    var baseGraph = context.graph();
+	    var mouse = context.map().mouse();
+	    var projection = context.projection;
+	    var viewport = geoExtent(projection.clipExtent()).polygon();
+	    if (!geoPointInPolygon(mouse, viewport)) return;
+	    var oldIDs = context.copyIDs();
+	    if (!oldIDs.length) return;
+	    var extent = geoExtent();
+	    var oldGraph = context.copyGraph();
+	    var newIDs = [];
+	    var action = actionCopyEntities(oldIDs, oldGraph);
+	    context.perform(action);
+	    var copies = action.copies();
+	    var originals = new Set();
+	    Object.values(copies).forEach(function (entity) {
+	      originals.add(entity.id);
+	    });
 
+	    for (var id in copies) {
+	      var oldEntity = oldGraph.entity(id);
+	      var newEntity = copies[id];
 
-	        // Container for the Add button
-	        var addRowEnter = wrap.selectAll('.add-row')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'add-row' + (_tagView !== 'list' ? ' hide' : ''));
+	      extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
-	        addRowEnter
-	            .append('button')
-	            .attr('class', 'add-tag')
-	            .call(svgIcon('#iD-icon-plus', 'light'))
-	            .on('click', addTag);
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-value');   // preserve space
+	      var parents = context.graph().parentWays(newEntity);
+	      var parentCopied = parents.some(function (parent) {
+	        return originals.has(parent.id);
+	      });
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-buttons');  // preserve space
+	      if (!parentCopied) {
+	        newIDs.push(newEntity.id);
+	      }
+	    } // Put pasted objects where mouse pointer is..
 
 
-	        // Tag list items
-	        var items = list.selectAll('.tag-row')
-	            .data(rowData, function(d) { return d.key; });
+	    var copyPoint = context.copyLonLat() && projection(context.copyLonLat()) || projection(extent.center());
+	    var delta = geoVecSubtract(mouse, copyPoint);
+	    context.perform(actionMove(newIDs, delta, projection));
+	    context.enter(modeMove(context, newIDs, baseGraph));
+	  }
 
-	        items.exit()
-	            .each(unbind)
-	            .remove();
+	  function behavior() {
+	    context.keybinding().on(uiCmd('⌘V'), doPaste);
+	    return behavior;
+	  }
 
+	  behavior.off = function () {
+	    context.keybinding().off(uiCmd('⌘V'));
+	  };
 
-	        // Enter
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', 'tag-row')
-	            .classed('readonly', isReadOnly);
+	  return behavior;
+	}
 
-	        var innerWrap = itemsEnter.append('div')
-	            .attr('class', 'inner-wrap');
+	/*
+	    `behaviorDrag` is like `d3_behavior.drag`, with the following differences:
 
-	        innerWrap
-	            .append('div')
-	            .attr('class', 'key-wrap')
-	            .append('input')
-	            .property('type', 'text')
-	            .attr('class', 'key')
-	            .call(utilNoAuto)
-	            .on('blur', keyChange)
-	            .on('change', keyChange);
-
-	        innerWrap
-	            .append('div')
-	            .attr('class', 'value-wrap')
-	            .append('input')
-	            .property('type', 'text')
-	            .attr('class', 'value')
-	            .call(utilNoAuto)
-	            .on('blur', valueChange)
-	            .on('change', valueChange)
-	            .on('keydown.push-more', pushMore);
-
-	        innerWrap
-	            .append('button')
-	            .attr('tabindex', -1)
-	            .attr('class', 'form-field-button remove')
-	            .attr('title', _t('icons.remove'))
-	            .call(svgIcon('#iD-operation-delete'));
-
-
-	        // Update
-	        items = items
-	            .merge(itemsEnter)
-	            .sort(function(a, b) { return a.index - b.index; });
-
-	        items
-	            .each(function(d) {
-	                var row = select(this);
-	                var key = row.select('input.key');      // propagate bound data
-	                var value = row.select('input.value');  // propagate bound data
-
-	                if (_entityIDs && taginfo && _state !== 'hover') {
-	                    bindTypeahead(key, value);
-	                }
+	    * The `origin` function is expected to return an [x, y] tuple rather than an
+	      {x, y} object.
+	    * The events are `start`, `move`, and `end`.
+	      (https://github.com/mbostock/d3/issues/563)
+	    * The `start` event is not dispatched until the first cursor movement occurs.
+	      (https://github.com/mbostock/d3/pull/368)
+	    * The `move` event has a `point` and `delta` [x, y] tuple properties rather
+	      than `x`, `y`, `dx`, and `dy` properties.
+	    * The `end` event is not dispatched if no movement occurs.
+	    * An `off` function is available that unbinds the drag's internal event handlers.
+	 */
 
-	                var reference;
+	function behaviorDrag() {
+	  var dispatch = dispatch$8('start', 'move', 'end'); // see also behaviorSelect
 
-	                if (typeof d.value !== 'string') {
-	                    reference = uiTagReference({ key: d.key });
-	                } else {
-	                    var isRelation = _entityIDs && _entityIDs.some(function(entityID) {
-	                        return context.entity(entityID).type === 'relation';
-	                    });
-	                    if (isRelation && d.key === 'type') {
-	                        reference = uiTagReference({ rtype: d.value });
-	                    } else {
-	                        reference = uiTagReference({ key: d.key, value: d.value });
-	                    }
-	                }
+	  var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
 
-	                if (_state === 'hover') {
-	                    reference.showing(false);
-	                }
+	  var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
 
-	                row.select('.inner-wrap')      // propagate bound data
-	                    .call(reference.button);
+	  var _origin = null;
+	  var _selector = '';
 
-	                row.call(reference.body);
+	  var _targetNode;
 
-	                row.select('button.remove');   // propagate bound data
-	            });
+	  var _targetEntity;
 
-	        items.selectAll('input.key')
-	            .attr('title', function(d) { return d.key; })
-	            .call(utilGetSetValue, function(d) { return d.key; })
-	            .attr('readonly', function(d) {
-	                return (isReadOnly(d) || (typeof d.value !== 'string')) || null;
-	            });
+	  var _surface;
 
-	        items.selectAll('input.value')
-	            .attr('title', function(d) {
-	                return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : d.value;
-	            })
-	            .classed('mixed', function(d) {
-	                return Array.isArray(d.value);
-	            })
-	            .attr('placeholder', function(d) {
-	                return typeof d.value === 'string' ? null : _t('inspector.multiple_values');
-	            })
-	            .call(utilGetSetValue, function(d) {
-	                return typeof d.value === 'string' ? d.value : '';
-	            })
-	            .attr('readonly', function(d) {
-	                return isReadOnly(d) || null;
-	            });
+	  var _pointerId; // use pointer events on supported platforms; fallback to mouse events
 
-	        items.selectAll('button.remove')
-	            .on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'down', removeTag);  // 'click' fires too late - #5878
 
-	    }
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	    function isReadOnly(d) {
-	        for (var i = 0; i < _readOnlyTags.length; i++) {
-	            if (d.key.match(_readOnlyTags[i]) !== null) {
-	                return true;
-	            }
-	        }
-	        return false;
-	    }
+	  var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
 
-	    function setTextareaHeight() {
-	        if (_tagView !== 'text') { return; }
+	  var d3_event_userSelectSuppress = function d3_event_userSelectSuppress() {
+	    var selection$1 = selection();
+	    var select = selection$1.style(d3_event_userSelectProperty);
+	    selection$1.style(d3_event_userSelectProperty, 'none');
+	    return function () {
+	      selection$1.style(d3_event_userSelectProperty, select);
+	    };
+	  };
 
-	        var selection = select(this);
-	        selection.style('height', null);
-	        selection.style('height', selection.node().scrollHeight + 5 + 'px');
-	    }
+	  function pointerdown(d3_event) {
+	    if (_pointerId) return;
+	    _pointerId = d3_event.pointerId || 'mouse';
+	    _targetNode = this; // only force reflow once per drag
 
-	    function stringify(s) {
-	        return JSON.stringify(s).slice(1, -1);   // without leading/trailing "
-	    }
+	    var pointerLocGetter = utilFastMouse(_surface || _targetNode.parentNode);
+	    var offset;
+	    var startOrigin = pointerLocGetter(d3_event);
+	    var started = false;
+	    var selectEnable = d3_event_userSelectSuppress();
+	    select(window).on(_pointerPrefix + 'move.drag', pointermove).on(_pointerPrefix + 'up.drag pointercancel.drag', pointerup, true);
 
-	    function unstringify(s) {
-	        var leading = '';
-	        var trailing = '';
-	        if (s.length < 1 || s.charAt(0) !== '"') {
-	            leading = '"';
-	        }
-	        if (s.length < 2 || s.charAt(s.length - 1) !== '"' ||
-	            (s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\')
-	        ) {
-	            trailing = '"';
-	        }
-	        return JSON.parse(leading + s + trailing);
+	    if (_origin) {
+	      offset = _origin.call(_targetNode, _targetEntity);
+	      offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
+	    } else {
+	      offset = [0, 0];
 	    }
 
-	    function rowsToText(rows) {
-	        var str = rows
-	            .filter(function(row) { return row.key && row.key.trim() !== ''; })
-	            .map(function(row) {
-	                var rawVal = row.value;
-	                if (typeof rawVal !== 'string') { rawVal = '*'; }
-	                var val = rawVal ? stringify(rawVal) : '';
-	                return stringify(row.key) + '=' + val;
-	            })
-	            .join('\n');
+	    d3_event.stopPropagation();
 
-	        if (_state !== 'hover' && str.length) {
-	            return str + '\n';
-	        }
-	        return  str;
-	    }
+	    function pointermove(d3_event) {
+	      if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      var p = pointerLocGetter(d3_event);
 
-	    function textChanged() {
-	        var newText = this.value.trim();
-	        var newTags = {};
-	        newText.split('\n').forEach(function(row) {
-	            var m = row.match(/^\s*([^=]+)=(.*)$/);
-	            if (m !== null) {
-	                var k = context.cleanTagKey(unstringify(m[1].trim()));
-	                var v = context.cleanTagValue(unstringify(m[2].trim()));
-	                newTags[k] = v;
-	            }
-	        });
+	      if (!started) {
+	        var dist = geoVecLength(startOrigin, p);
+	        var tolerance = d3_event.pointerType === 'pen' ? _penTolerancePx : _tolerancePx; // don't start until the drag has actually moved somewhat
 
-	        var tagDiff = utilTagDiff(_tags, newTags);
-	        if (!tagDiff.length) { return; }
+	        if (dist < tolerance) return;
+	        started = true;
+	        dispatch.call('start', this, d3_event, _targetEntity); // Don't send a `move` event in the same cycle as `start` since dragging
+	        // a midpoint will convert the target to a node.
+	      } else {
+	        startOrigin = p;
+	        d3_event.stopPropagation();
+	        d3_event.preventDefault();
+	        var dx = p[0] - startOrigin[0];
+	        var dy = p[1] - startOrigin[1];
+	        dispatch.call('move', this, d3_event, _targetEntity, [p[0] + offset[0], p[1] + offset[1]], [dx, dy]);
+	      }
+	    }
 
-	        _pendingChange  = _pendingChange || {};
+	    function pointerup(d3_event) {
+	      if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      _pointerId = null;
 
-	        tagDiff.forEach(function(change) {
-	            if (isReadOnly({ key: change.key })) { return; }
+	      if (started) {
+	        dispatch.call('end', this, d3_event, _targetEntity);
+	        d3_event.preventDefault();
+	      }
 
-	            // skip unchanged multiselection placeholders
-	            if (change.newVal === '*' && typeof change.oldVal !== 'string') { return; }
+	      select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+	      selectEnable();
+	    }
+	  }
 
-	            if (change.type === '-') {
-	                _pendingChange[change.key] = undefined;
-	            } else if (change.type === '+') {
-	                _pendingChange[change.key] = change.newVal || '';
-	            }
-	        });
+	  function behavior(selection) {
+	    var matchesSelector = utilPrefixDOMProperty('matchesSelector');
+	    var delegate = pointerdown;
 
-	        if (Object.keys(_pendingChange).length === 0) {
-	            _pendingChange = null;
-	            return;
-	        }
+	    if (_selector) {
+	      delegate = function delegate(d3_event) {
+	        var root = this;
+	        var target = d3_event.target;
 
-	        scheduleChange();
-	    }
+	        for (; target && target !== root; target = target.parentNode) {
+	          var datum = target.__data__;
+	          _targetEntity = datum instanceof osmNote ? datum : datum && datum.properties && datum.properties.entity;
 
-	    function pushMore() {
-	        // if pressing Tab on the last value field with content, add a blank row
-	        if (event.keyCode === 9 && !event.shiftKey &&
-	            section.selection().selectAll('.tag-list li:last-child input.value').node() === this &&
-	            utilGetSetValue(select(this))) {
-	            addTag();
+	          if (_targetEntity && target[matchesSelector](_selector)) {
+	            return pointerdown.call(target, d3_event);
+	          }
 	        }
+	      };
 	    }
 
-	    function bindTypeahead(key, value) {
-	        if (isReadOnly(key.datum())) { return; }
+	    selection.on(_pointerPrefix + 'down.drag' + _selector, delegate);
+	  }
 
-	        if (Array.isArray(value.datum().value)) {
-	            value.call(uiCombobox(context, 'tag-value')
-	                .minItems(1)
-	                .fetcher(function(value, callback) {
-	                    var keyString = utilGetSetValue(key);
-	                    if (!_tags[keyString]) { return; }
-	                    var data = _tags[keyString].filter(Boolean).map(function(tagValue) {
-	                        return {
-	                            value: tagValue,
-	                            title: tagValue
-	                        };
-	                    });
-	                    callback(data);
-	                }));
-	            return;
-	        }
+	  behavior.off = function (selection) {
+	    selection.on(_pointerPrefix + 'down.drag' + _selector, null);
+	  };
 
-	        var geometry = context.graph().geometry(_entityIDs[0]);
+	  behavior.selector = function (_) {
+	    if (!arguments.length) return _selector;
+	    _selector = _;
+	    return behavior;
+	  };
 
-	        key.call(uiCombobox(context, 'tag-key')
-	            .fetcher(function(value, callback) {
-	                taginfo.keys({
-	                    debounce: true,
-	                    geometry: geometry,
-	                    query: value
-	                }, function(err, data) {
-	                    if (!err) {
-	                        var filtered = data.filter(function(d) { return _tags[d.value] === undefined; });
-	                        callback(sort(value, filtered));
-	                    }
-	                });
-	            }));
+	  behavior.origin = function (_) {
+	    if (!arguments.length) return _origin;
+	    _origin = _;
+	    return behavior;
+	  };
 
-	        value.call(uiCombobox(context, 'tag-value')
-	            .fetcher(function(value, callback) {
-	                taginfo.values({
-	                    debounce: true,
-	                    key: utilGetSetValue(key),
-	                    geometry: geometry,
-	                    query: value
-	                }, function(err, data) {
-	                    if (!err) { callback(sort(value, data)); }
-	                });
-	            }));
+	  behavior.cancel = function () {
+	    select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+	    return behavior;
+	  };
 
+	  behavior.targetNode = function (_) {
+	    if (!arguments.length) return _targetNode;
+	    _targetNode = _;
+	    return behavior;
+	  };
 
-	        function sort(value, data) {
-	            var sameletter = [];
-	            var other = [];
-	            for (var i = 0; i < data.length; i++) {
-	                if (data[i].value.substring(0, value.length) === value) {
-	                    sameletter.push(data[i]);
-	                } else {
-	                    other.push(data[i]);
-	                }
-	            }
-	            return sameletter.concat(other);
-	        }
-	    }
+	  behavior.targetEntity = function (_) {
+	    if (!arguments.length) return _targetEntity;
+	    _targetEntity = _;
+	    return behavior;
+	  };
 
-	    function unbind() {
-	        var row = select(this);
+	  behavior.surface = function (_) {
+	    if (!arguments.length) return _surface;
+	    _surface = _;
+	    return behavior;
+	  };
 
-	        row.selectAll('input.key')
-	            .call(uiCombobox.off, context);
+	  return utilRebind(behavior, dispatch, 'on');
+	}
 
-	        row.selectAll('input.value')
-	            .call(uiCombobox.off, context);
-	    }
+	function modeDragNode(context) {
+	  var mode = {
+	    id: 'drag-node',
+	    button: 'browse'
+	  };
+	  var hover = behaviorHover(context).altDisables(true).on('hover', context.ui().sidebar.hover);
+	  var edit = behaviorEdit(context);
 
-	    function keyChange(d) {
-	        if (select(this).attr('readonly')) { return; }
+	  var _nudgeInterval;
 
-	        var kOld = d.key;
+	  var _restoreSelectedIDs = [];
+	  var _wasMidpoint = false;
+	  var _isCancelled = false;
 
-	        // exit if we are currently about to delete this row anyway - #6366
-	        if (_pendingChange && _pendingChange.hasOwnProperty(kOld) && _pendingChange[kOld] === undefined) { return; }
+	  var _activeEntity;
 
-	        var kNew = context.cleanTagKey(this.value.trim());
+	  var _startLoc;
 
-	        // allow no change if the key should be readonly
-	        if (isReadOnly({ key: kNew })) {
-	            this.value = kOld;
-	            return;
-	        }
+	  var _lastLoc;
 
-	        if (kNew &&
-	            kNew !== kOld &&
-	            _tags[kNew] !== undefined) {
-	            // new key is already in use, switch focus to the existing row
+	  function startNudge(d3_event, entity, nudge) {
+	    if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+	    _nudgeInterval = window.setInterval(function () {
+	      context.map().pan(nudge);
+	      doMove(d3_event, entity, nudge);
+	    }, 50);
+	  }
 
-	            this.value = kOld;                // reset the key
-	            section.selection().selectAll('.tag-list input.value')
-	                .each(function(d) {
-	                    if (d.key === kNew) {     // send focus to that other value combo instead
-	                        var input = select(this).node();
-	                        input.focus();
-	                        input.select();
-	                    }
-	                });
-	            return;
-	        }
+	  function stopNudge() {
+	    if (_nudgeInterval) {
+	      window.clearInterval(_nudgeInterval);
+	      _nudgeInterval = null;
+	    }
+	  }
 
+	  function moveAnnotation(entity) {
+	    return _t('operations.move.annotation.' + entity.geometry(context.graph()));
+	  }
 
-	        var row = this.parentNode.parentNode;
-	        var inputVal = select(row).selectAll('input.value');
-	        var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
+	  function connectAnnotation(nodeEntity, targetEntity) {
+	    var nodeGeometry = nodeEntity.geometry(context.graph());
+	    var targetGeometry = targetEntity.geometry(context.graph());
 
-	        _pendingChange = _pendingChange || {};
+	    if (nodeGeometry === 'vertex' && targetGeometry === 'vertex') {
+	      var nodeParentWayIDs = context.graph().parentWays(nodeEntity);
+	      var targetParentWayIDs = context.graph().parentWays(targetEntity);
+	      var sharedParentWays = utilArrayIntersection(nodeParentWayIDs, targetParentWayIDs); // if both vertices are part of the same way
 
-	        if (kOld) {
-	            _pendingChange[kOld] = undefined;
+	      if (sharedParentWays.length !== 0) {
+	        // if the nodes are next to each other, they are merged
+	        if (sharedParentWays[0].areAdjacent(nodeEntity.id, targetEntity.id)) {
+	          return _t('operations.connect.annotation.from_vertex.to_adjacent_vertex');
 	        }
 
-	        _pendingChange[kNew] = vNew;
-
-	        // update the ordered key index so this row doesn't change position
-	        var existingKeyIndex = _orderedKeys.indexOf(kOld);
-	        if (existingKeyIndex !== -1) { _orderedKeys[existingKeyIndex] = kNew; }
-
-	        d.key = kNew;    // update datum to avoid exit/enter on tag update
-	        d.value = vNew;
-
-	        this.value = kNew;
-	        utilGetSetValue(inputVal, vNew);
-	        scheduleChange();
+	        return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
+	      }
 	    }
 
-	    function valueChange(d) {
-	        if (isReadOnly(d)) { return; }
+	    return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
+	  }
 
-	        // exit if this is a multiselection and no value was entered
-	        if (typeof d.value !== 'string' && !this.value) { return; }
+	  function shouldSnapToNode(target) {
+	    if (!_activeEntity) return false;
+	    return _activeEntity.geometry(context.graph()) !== 'vertex' || target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph());
+	  }
 
-	        // exit if we are currently about to delete this row anyway - #6366
-	        if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) { return; }
+	  function origin(entity) {
+	    return context.projection(entity.loc);
+	  }
 
-	        _pendingChange = _pendingChange || {};
+	  function keydown(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope')) {
+	        context.surface().classed('nope-suppressed', true);
+	      }
 
-	        _pendingChange[d.key] = context.cleanTagValue(this.value);
-	        scheduleChange();
+	      context.surface().classed('nope', false).classed('nope-disabled', true);
 	    }
+	  }
 
-	    function removeTag(d) {
-	        if (isReadOnly(d)) { return; }
+	  function keyup(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope-suppressed')) {
+	        context.surface().classed('nope', true);
+	      }
 
-	        if (d.key === '') {    // removing the blank row
-	            _showBlank = false;
-	            section.reRender();
+	      context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+	    }
+	  }
 
-	        } else {
-	            // remove the key from the ordered key index
-	            _orderedKeys = _orderedKeys.filter(function(key) { return key !== d.key; });
+	  function start(d3_event, entity) {
+	    _wasMidpoint = entity.type === 'midpoint';
+	    var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
+	    _isCancelled = !context.editable() || d3_event.shiftKey || hasHidden;
 
-	            _pendingChange  = _pendingChange || {};
-	            _pendingChange[d.key] = undefined;
-	            scheduleChange();
-	        }
-	    }
+	    if (_isCancelled) {
+	      if (hasHidden) {
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('modes.drag_node.connected_to_hidden'))();
+	      }
 
-	    function addTag() {
-	        // Delay render in case this click is blurring an edited combo.
-	        // Without the setTimeout, the `content` render would wipe out the pending tag change.
-	        window.setTimeout(function() {
-	            _showBlank = true;
-	            section.reRender();
-	            section.selection().selectAll('.tag-list li:last-child input.key').node().focus();
-	        }, 20);
+	      return drag.cancel();
 	    }
 
-	    function scheduleChange() {
-	        // Cache IDs in case the editor is reloaded before the change event is called. - #6028
-	        var entityIDs = _entityIDs;
-
-	        // Delay change in case this change is blurring an edited combo. - #5878
-	        window.setTimeout(function() {
-	            if (!_pendingChange) { return; }
+	    if (_wasMidpoint) {
+	      var midpoint = entity;
+	      entity = osmNode();
+	      context.perform(actionAddMidpoint(midpoint, entity));
+	      entity = context.entity(entity.id); // get post-action entity
 
-	            dispatch$1.call('change', this, entityIDs, _pendingChange);
-	            _pendingChange = null;
-	        }, 10);
+	      var vertex = context.surface().selectAll('.' + entity.id);
+	      drag.targetNode(vertex.node()).targetEntity(entity);
+	    } else {
+	      context.perform(actionNoop());
 	    }
 
+	    _activeEntity = entity;
+	    _startLoc = entity.loc;
+	    hover.ignoreVertex(entity.geometry(context.graph()) === 'vertex');
+	    context.surface().selectAll('.' + _activeEntity.id).classed('active', true);
+	    context.enter(mode);
+	  } // related code
+	  // - `behavior/draw.js` `datum()`
 
-	    section.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        if (_state !== val) {
-	            _orderedKeys = [];
-	            _state = val;
-	        }
-	        return section;
-	    };
 
+	  function datum(d3_event) {
+	    if (!d3_event || d3_event.altKey) {
+	      return {};
+	    } else {
+	      // When dragging, snap only to touch targets..
+	      // (this excludes area fills and active drawing elements)
+	      var d = d3_event.target.__data__;
+	      return d && d.properties && d.properties.target ? d : {};
+	    }
+	  }
+
+	  function doMove(d3_event, entity, nudge) {
+	    nudge = nudge || [0, 0];
+	    var currPoint = d3_event && d3_event.point || context.projection(_lastLoc);
+	    var currMouse = geoVecSubtract(currPoint, nudge);
+	    var loc = context.projection.invert(currMouse);
+	    var target, edge;
+
+	    if (!_nudgeInterval) {
+	      // If not nudging at the edge of the viewport, try to snap..
+	      // related code
+	      // - `mode/drag_node.js`     `doMove()`
+	      // - `behavior/draw.js`      `click()`
+	      // - `behavior/draw_way.js`  `move()`
+	      var d = datum(d3_event);
+	      target = d && d.properties && d.properties.entity;
+	      var targetLoc = target && target.loc;
+	      var targetNodes = d && d.properties && d.properties.nodes;
+
+	      if (targetLoc) {
+	        // snap to node/vertex - a point target with `.loc`
+	        if (shouldSnapToNode(target)) {
+	          loc = targetLoc;
+	        }
+	      } else if (targetNodes) {
+	        // snap to way - a line target with `.nodes`
+	        edge = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, end.id);
 
-	    section.presets = function(val) {
-	        if (!arguments.length) { return _presets; }
-	        _presets = val;
-	        if (_presets && _presets.length && _presets[0].isFallback()) {
-	            section.disclosureExpanded(true);
-	        } else {
-	            section.disclosureExpanded(null);
+	        if (edge) {
+	          loc = edge.loc;
 	        }
-	        return section;
-	    };
+	      }
+	    }
 
+	    context.replace(actionMoveNode(entity.id, loc)); // Below here: validations
 
-	    section.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
-	        return section;
-	    };
+	    var isInvalid = false; // Check if this connection to `target` could cause relations to break..
 
+	    if (target) {
+	      isInvalid = hasRelationConflict(entity, target, edge, context.graph());
+	    } // Check if this drag causes the geometry to break..
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-	            _entityIDs = val;
-	            _orderedKeys = [];
-	        }
-	        return section;
-	    };
 
+	    if (!isInvalid) {
+	      isInvalid = hasInvalidGeometry(entity, context.graph());
+	    }
 
-	    // pass an array of regular expressions to test against the tag key
-	    section.readOnlyTags = function(val) {
-	        if (!arguments.length) { return _readOnlyTags; }
-	        _readOnlyTags = val;
-	        return section;
-	    };
+	    var nope = context.surface().classed('nope');
 
+	    if (isInvalid === 'relation' || isInvalid === 'restriction') {
+	      if (!nope) {
+	        // about to nope - show hint
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t.html('operations.connect.' + isInvalid, {
+	          relation: _mainPresetIndex.item('type/restriction').name()
+	        }))();
+	      }
+	    } else if (isInvalid) {
+	      var errorID = isInvalid === 'line' ? 'lines' : 'areas';
+	      context.ui().flash.duration(3000).iconName('#iD-icon-no').label(_t.html('self_intersection.error.' + errorID))();
+	    } else {
+	      if (nope) {
+	        // about to un-nope, remove hint
+	        context.ui().flash.duration(1).label('')();
+	      }
+	    }
 
-	    return utilRebind(section, dispatch$1, 'on');
-	}
+	    var nopeDisabled = context.surface().classed('nope-disabled');
 
-	function uiDataEditor(context) {
-	    var dataHeader = uiDataHeader();
-	    var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context)
-	        .expandedByDefault(true)
-	        .readOnlyTags([/./]);
-	    var _datum;
+	    if (nopeDisabled) {
+	      context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+	    } else {
+	      context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
+	    }
 
+	    _lastLoc = loc;
+	  } // Uses `actionConnect.disabled()` to know whether this connection is ok..
 
-	    function dataEditor(selection) {
 
-	        var header = selection.selectAll('.header')
-	            .data([0]);
+	  function hasRelationConflict(entity, target, edge, graph) {
+	    var testGraph = graph.update(); // copy
+	    // if snapping to way - add midpoint there and consider that the target..
 
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'header fillL');
+	    if (edge) {
+	      var midpoint = osmNode();
+	      var action = actionAddMidpoint({
+	        loc: edge.loc,
+	        edge: [target.nodes[edge.index - 1], target.nodes[edge.index]]
+	      }, midpoint);
+	      testGraph = action(testGraph);
+	      target = midpoint;
+	    } // can we connect to it?
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'close')
-	            .on('click', function() {
-	                context.enter(modeBrowse(context));
-	            })
-	            .call(svgIcon('#iD-icon-close'));
 
-	        headerEnter
-	            .append('h3')
-	            .text(_t('map_data.title'));
+	    var ids = [entity.id, target.id];
+	    return actionConnect(ids).disabled(testGraph);
+	  }
 
+	  function hasInvalidGeometry(entity, graph) {
+	    var parents = graph.parentWays(entity);
+	    var i, j, k;
 
-	        var body = selection.selectAll('.body')
-	            .data([0]);
+	    for (i = 0; i < parents.length; i++) {
+	      var parent = parents[i];
+	      var nodes = [];
+	      var activeIndex = null; // which multipolygon ring contains node being dragged
+	      // test any parent multipolygons for valid geometry
 
-	        body = body.enter()
-	            .append('div')
-	            .attr('class', 'body')
-	            .merge(body);
+	      var relations = graph.parentRelations(parent);
 
-	        var editor = body.selectAll('.data-editor')
-	            .data([0]);
+	      for (j = 0; j < relations.length; j++) {
+	        if (!relations[j].isMultipolygon()) continue;
+	        var rings = osmJoinWays(relations[j].members, graph); // find active ring and test it for self intersections
 
-	        // enter/update
-	        editor.enter()
-	            .append('div')
-	            .attr('class', 'modal-section data-editor')
-	            .merge(editor)
-	            .call(dataHeader.datum(_datum));
+	        for (k = 0; k < rings.length; k++) {
+	          nodes = rings[k].nodes;
 
-	        var rte = body.selectAll('.raw-tag-editor')
-	            .data([0]);
+	          if (nodes.find(function (n) {
+	            return n.id === entity.id;
+	          })) {
+	            activeIndex = k;
 
-	        // enter/update
-	        rte.enter()
-	            .append('div')
-	            .attr('class', 'raw-tag-editor data-editor')
-	            .merge(rte)
-	            .call(rawTagEditor
-	                .tags((_datum && _datum.properties) || {})
-	                .state('hover')
-	                .render
-	            )
-	            .selectAll('textarea.tag-text')
-	            .attr('readonly', true)
-	            .classed('readonly', true);
-	    }
+	            if (geoHasSelfIntersections(nodes, entity.id)) {
+	              return 'multipolygonMember';
+	            }
+	          }
 
+	          rings[k].coords = nodes.map(function (n) {
+	            return n.loc;
+	          });
+	        } // test active ring for intersections with other rings in the multipolygon
 
-	    dataEditor.datum = function(val) {
-	        if (!arguments.length) { return _datum; }
-	        _datum = val;
-	        return this;
-	    };
 
+	        for (k = 0; k < rings.length; k++) {
+	          if (k === activeIndex) continue; // make sure active ring doesn't cross passive rings
 
-	    return dataEditor;
-	}
+	          if (geoHasLineIntersections(rings[activeIndex].nodes, rings[k].nodes, entity.id)) {
+	            return 'multipolygonRing';
+	          }
+	        }
+	      } // If we still haven't tested this node's parent way for self-intersections.
+	      // (because it's not a member of a multipolygon), test it now.
 
-	function modeSelectData(context, selectedDatum) {
-	    var mode = {
-	        id: 'select-data',
-	        button: 'browse'
-	    };
 
-	    var keybinding = utilKeybinding('select-data');
-	    var dataEditor = uiDataEditor(context);
+	      if (activeIndex === null) {
+	        nodes = parent.nodes.map(function (nodeID) {
+	          return graph.entity(nodeID);
+	        });
 
-	    var behaviors = [
-	        behaviorBreathe(),
-	        behaviorHover(context),
-	        behaviorSelect(context),
-	        behaviorLasso(context),
-	        modeDragNode(context).behavior,
-	        modeDragNote(context).behavior
-	    ];
+	        if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
+	          return parent.geometry(graph);
+	        }
+	      }
+	    }
 
+	    return false;
+	  }
 
-	    // class the data as selected, or return to browse mode if the data is gone
-	    function selectData(drawn) {
-	        var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);
+	  function move(d3_event, entity, point) {
+	    if (_isCancelled) return;
+	    d3_event.stopPropagation();
+	    context.surface().classed('nope-disabled', d3_event.altKey);
+	    _lastLoc = context.projection.invert(point);
+	    doMove(d3_event, entity);
+	    var nudge = geoViewportEdge(point, context.map().dimensions());
 
-	        if (selection.empty()) {
-	            // Return to browse mode if selected DOM elements have
-	            // disappeared because the user moved them out of view..
-	            var source = event && event.type === 'zoom' && event.sourceEvent;
-	            if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-	                context.enter(modeBrowse(context));
-	            }
-	        } else {
-	            selection.classed('selected', true);
-	        }
+	    if (nudge) {
+	      startNudge(d3_event, entity, nudge);
+	    } else {
+	      stopNudge();
+	    }
+	  }
+
+	  function end(d3_event, entity) {
+	    if (_isCancelled) return;
+	    var wasPoint = entity.geometry(context.graph()) === 'point';
+	    var d = datum(d3_event);
+	    var nope = d && d.properties && d.properties.nope || context.surface().classed('nope');
+	    var target = d && d.properties && d.properties.entity; // entity to snap to
+
+	    if (nope) {
+	      // bounce back
+	      context.perform(_actionBounceBack(entity.id, _startLoc));
+	    } else if (target && target.type === 'way') {
+	      var choice = geoChooseEdge(context.graph().childNodes(target), context.map().mouse(), context.projection, entity.id);
+	      context.replace(actionAddMidpoint({
+	        loc: choice.loc,
+	        edge: [target.nodes[choice.index - 1], target.nodes[choice.index]]
+	      }, entity), connectAnnotation(entity, target));
+	    } else if (target && target.type === 'node' && shouldSnapToNode(target)) {
+	      context.replace(actionConnect([target.id, entity.id]), connectAnnotation(entity, target));
+	    } else if (_wasMidpoint) {
+	      context.replace(actionNoop(), _t('operations.add.annotation.vertex'));
+	    } else {
+	      context.replace(actionNoop(), moveAnnotation(entity));
 	    }
 
+	    if (wasPoint) {
+	      context.enter(modeSelect(context, [entity.id]));
+	    } else {
+	      var reselection = _restoreSelectedIDs.filter(function (id) {
+	        return context.graph().hasEntity(id);
+	      });
 
-	    function esc() {
-	        if (context.container().select('.combobox').size()) { return; }
+	      if (reselection.length) {
+	        context.enter(modeSelect(context, reselection));
+	      } else {
 	        context.enter(modeBrowse(context));
+	      }
 	    }
+	  }
 
+	  function _actionBounceBack(nodeID, toLoc) {
+	    var moveNode = actionMoveNode(nodeID, toLoc);
 
-	    mode.zoomToSelected = function() {
-	        var extent = geoExtent(d3_geoBounds(selectedDatum));
-	        context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
+	    var action = function action(graph, t) {
+	      // last time through, pop off the bounceback perform.
+	      // it will then overwrite the initial perform with a moveNode that does nothing
+	      if (t === 1) context.pop();
+	      return moveNode(graph, t);
 	    };
 
+	    action.transitionable = true;
+	    return action;
+	  }
 
-	    mode.enter = function() {
-	        behaviors.forEach(context.install);
-
-	        keybinding
-	            .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-	            .on('⎋', esc, true);
+	  function cancel() {
+	    drag.cancel();
+	    context.enter(modeBrowse(context));
+	  }
 
-	        select(document)
-	            .call(keybinding);
+	  var drag = behaviorDrag().selector('.layer-touch.points .target').surface(context.container().select('.main-map').node()).origin(origin).on('start', start).on('move', move).on('end', end);
 
-	        selectData();
+	  mode.enter = function () {
+	    context.install(hover);
+	    context.install(edit);
+	    select(window).on('keydown.dragNode', keydown).on('keyup.dragNode', keyup);
+	    context.history().on('undone.drag-node', cancel);
+	  };
 
-	        var sidebar = context.ui().sidebar;
-	        sidebar.show(dataEditor.datum(selectedDatum));
+	  mode.exit = function () {
+	    context.ui().sidebar.hover.cancel();
+	    context.uninstall(hover);
+	    context.uninstall(edit);
+	    select(window).on('keydown.dragNode', null).on('keyup.dragNode', null);
+	    context.history().on('undone.drag-node', null);
+	    _activeEntity = null;
+	    context.surface().classed('nope', false).classed('nope-suppressed', false).classed('nope-disabled', false).selectAll('.active').classed('active', false);
+	    stopNudge();
+	  };
 
-	        // expand the sidebar, avoid obscuring the data if needed
-	        var extent = geoExtent(d3_geoBounds(selectedDatum));
-	        sidebar.expand(sidebar.intersects(extent));
+	  mode.selectedIDs = function () {
+	    if (!arguments.length) return _activeEntity ? [_activeEntity.id] : []; // no assign
 
-	        context.map()
-	            .on('drawn.select-data', selectData);
-	    };
+	    return mode;
+	  };
 
+	  mode.activeID = function () {
+	    if (!arguments.length) return _activeEntity && _activeEntity.id; // no assign
 
-	    mode.exit = function() {
-	        behaviors.forEach(context.uninstall);
+	    return mode;
+	  };
 
-	        select(document)
-	            .call(keybinding.unbind);
+	  mode.restoreSelectedIDs = function (_) {
+	    if (!arguments.length) return _restoreSelectedIDs;
+	    _restoreSelectedIDs = _;
+	    return mode;
+	  };
 
-	        context.surface()
-	            .selectAll('.layer-mapdata .selected')
-	            .classed('selected hover', false);
+	  mode.behavior = drag;
+	  return mode;
+	}
 
-	        context.map()
-	            .on('drawn.select-data', null);
+	var $$3 = _export;
+	var NativePromise = nativePromiseConstructor;
+	var fails$1 = fails$V;
+	var getBuiltIn = getBuiltIn$b;
+	var isCallable = isCallable$r;
+	var speciesConstructor = speciesConstructor$5;
+	var promiseResolve = promiseResolve$2;
+	var redefine$1 = redefine$h.exports;
 
-	        context.ui().sidebar
-	            .hide();
-	    };
+	// Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829
+	var NON_GENERIC = !!NativePromise && fails$1(function () {
+	  // eslint-disable-next-line unicorn/no-thenable -- required for testing
+	  NativePromise.prototype['finally'].call({ then: function () { /* empty */ } }, function () { /* empty */ });
+	});
 
+	// `Promise.prototype.finally` method
+	// https://tc39.es/ecma262/#sec-promise.prototype.finally
+	$$3({ target: 'Promise', proto: true, real: true, forced: NON_GENERIC }, {
+	  'finally': function (onFinally) {
+	    var C = speciesConstructor(this, getBuiltIn('Promise'));
+	    var isFunction = isCallable(onFinally);
+	    return this.then(
+	      isFunction ? function (x) {
+	        return promiseResolve(C, onFinally()).then(function () { return x; });
+	      } : onFinally,
+	      isFunction ? function (e) {
+	        return promiseResolve(C, onFinally()).then(function () { throw e; });
+	      } : onFinally
+	    );
+	  }
+	});
 
-	    return mode;
+	// makes sure that native promise-based APIs `Promise#finally` properly works with patched `Promise#then`
+	if (isCallable(NativePromise)) {
+	  var method = getBuiltIn('Promise').prototype['finally'];
+	  if (NativePromise.prototype['finally'] !== method) {
+	    redefine$1(NativePromise.prototype, 'finally', method, { unsafe: true });
+	  }
 	}
 
-	function uiImproveOsmComments() {
-	  var _qaItem;
+	function quickselect(arr, k, left, right, compare) {
+	  quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
+	}
 
-	  function issueComments(selection) {
-	    // make the div immediately so it appears above the buttons
-	    var comments = selection.selectAll('.comments-container')
-	      .data([0]);
-
-	    comments = comments.enter()
-	      .append('div')
-	        .attr('class', 'comments-container')
-	      .merge(comments);
-
-	    // must retrieve comments from API before they can be displayed
-	    services.improveOSM.getComments(_qaItem)
-	      .then(function (d) {
-	        if (!d.comments) { return; } // nothing to do here
-
-	        var commentEnter = comments.selectAll('.comment')
-	          .data(d.comments)
-	          .enter()
-	          .append('div')
-	            .attr('class', 'comment');
-
-	        commentEnter
-	          .append('div')
-	            .attr('class', 'comment-avatar')
-	            .call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
-
-	        var mainEnter = commentEnter
-	          .append('div')
-	          .attr('class', 'comment-main');
-
-	        var metadataEnter = mainEnter
-	          .append('div')
-	            .attr('class', 'comment-metadata');
-
-	        metadataEnter
-	          .append('div')
-	            .attr('class', 'comment-author')
-	            .each(function(d) {
-	              var osm = services.osm;
-	              var selection = select(this);
-	              if (osm && d.username) {
-	                selection = selection
-	                  .append('a')
-	                  .attr('class', 'comment-author-link')
-	                  .attr('href', osm.userURL(d.username))
-	                  .attr('tabindex', -1)
-	                  .attr('target', '_blank');
-	              }
-	              selection
-	                .text(function (d) { return d.username; });
-	            });
+	function quickselectStep(arr, k, left, right, compare) {
+	  while (right > left) {
+	    if (right - left > 600) {
+	      var n = right - left + 1;
+	      var m = k - left + 1;
+	      var z = Math.log(n);
+	      var s = 0.5 * Math.exp(2 * z / 3);
+	      var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
+	      var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
+	      var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
+	      quickselectStep(arr, k, newLeft, newRight, compare);
+	    }
+
+	    var t = arr[k];
+	    var i = left;
+	    var j = right;
+	    swap(arr, left, k);
+	    if (compare(arr[right], t) > 0) swap(arr, left, right);
+
+	    while (i < j) {
+	      swap(arr, i, j);
+	      i++;
+	      j--;
 
-	        metadataEnter
-	          .append('div')
-	            .attr('class', 'comment-date')
-	            .text(function (d) { return _t('note.status.commented', { when: localeDateString(d.timestamp) }); });
+	      while (compare(arr[i], t) < 0) {
+	        i++;
+	      }
 
-	        mainEnter
-	          .append('div')
-	            .attr('class', 'comment-text')
-	          .append('p')
-	            .text(function (d) { return d.text; });
-	    })
-	    .catch(function (err) {
-	      console.log(err); // eslint-disable-line no-console
-	    });
-	  }
+	      while (compare(arr[j], t) > 0) {
+	        j--;
+	      }
+	    }
 
-	  function localeDateString(s) {
-	    if (!s) { return null; }
-	    var options = { day: 'numeric', month: 'short', year: 'numeric' };
-	    var d = new Date(s * 1000); // timestamp is served in seconds, date takes ms
-	    if (isNaN(d.getTime())) { return null; }
-	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	    if (compare(arr[left], t) === 0) swap(arr, left, j);else {
+	      j++;
+	      swap(arr, j, right);
+	    }
+	    if (j <= k) left = j + 1;
+	    if (k <= j) right = j - 1;
 	  }
+	}
 
-	  issueComments.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return issueComments;
-	  };
+	function swap(arr, i, j) {
+	  var tmp = arr[i];
+	  arr[i] = arr[j];
+	  arr[j] = tmp;
+	}
 
-	  return issueComments;
+	function defaultCompare(a, b) {
+	  return a < b ? -1 : a > b ? 1 : 0;
 	}
 
-	function uiImproveOsmDetails(context) {
-	  var _qaItem;
+	var RBush = /*#__PURE__*/function () {
+	  function RBush() {
+	    var maxEntries = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 9;
 
+	    _classCallCheck$1(this, RBush);
 
-	  function issueDetail(d) {
-	    if (d.desc) { return d.desc; }
-	    var issueKey = d.issueKey;
-	    d.replacements = d.replacements || {};
-	    d.replacements.default = _t('inspector.unknown');  // special key `default` works as a fallback string
-	    return _t(("QA.improveOSM.error_types." + issueKey + ".description"), d.replacements);
+	    // max entries in a node is 9 by default; min node fill is 40% for best performance
+	    this._maxEntries = Math.max(4, maxEntries);
+	    this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
+	    this.clear();
 	  }
 
+	  _createClass$1(RBush, [{
+	    key: "all",
+	    value: function all() {
+	      return this._all(this.data, []);
+	    }
+	  }, {
+	    key: "search",
+	    value: function search(bbox) {
+	      var node = this.data;
+	      var result = [];
+	      if (!intersects(bbox, node)) return result;
+	      var toBBox = this.toBBox;
+	      var nodesToSearch = [];
+
+	      while (node) {
+	        for (var i = 0; i < node.children.length; i++) {
+	          var child = node.children[i];
+	          var childBBox = node.leaf ? toBBox(child) : child;
 
-	  function improveOsmDetails(selection) {
-	    var details = selection.selectAll('.error-details')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	          if (intersects(bbox, childBBox)) {
+	            if (node.leaf) result.push(child);else if (contains(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
+	          }
+	        }
 
-	    details.exit()
-	      .remove();
+	        node = nodesToSearch.pop();
+	      }
 
-	    var detailsEnter = details.enter()
-	      .append('div')
-	        .attr('class', 'error-details qa-details-container');
+	      return result;
+	    }
+	  }, {
+	    key: "collides",
+	    value: function collides(bbox) {
+	      var node = this.data;
+	      if (!intersects(bbox, node)) return false;
+	      var nodesToSearch = [];
 
+	      while (node) {
+	        for (var i = 0; i < node.children.length; i++) {
+	          var child = node.children[i];
+	          var childBBox = node.leaf ? this.toBBox(child) : child;
 
-	    // description
-	    var descriptionEnter = detailsEnter
-	      .append('div')
-	        .attr('class', 'qa-details-subsection');
+	          if (intersects(bbox, childBBox)) {
+	            if (node.leaf || contains(bbox, childBBox)) return true;
+	            nodesToSearch.push(child);
+	          }
+	        }
 
-	    descriptionEnter
-	      .append('h4')
-	        .text(function () { return _t('QA.keepRight.detail_description'); });
+	        node = nodesToSearch.pop();
+	      }
 
-	    descriptionEnter
-	      .append('div')
-	        .attr('class', 'qa-details-description-text')
-	        .html(issueDetail);
+	      return false;
+	    }
+	  }, {
+	    key: "load",
+	    value: function load(data) {
+	      if (!(data && data.length)) return this;
 
-	    // If there are entity links in the error message..
-	    var relatedEntities = [];
-	    descriptionEnter.selectAll('.error_entity_link, .error_object_link')
-	      .each(function() {
-	        var link = select(this);
-	        var isObjectLink = link.classed('error_object_link');
-	        var entityID = isObjectLink ?
-	          (utilEntityRoot(_qaItem.objectType) + _qaItem.objectId)
-	          : this.textContent;
-	        var entity = context.hasEntity(entityID);
+	      if (data.length < this._minEntries) {
+	        for (var i = 0; i < data.length; i++) {
+	          this.insert(data[i]);
+	        }
 
-	        relatedEntities.push(entityID);
+	        return this;
+	      } // recursively build the tree with the given data from scratch using OMT algorithm
 
-	        // Add click handler
-	        link
-	          .on('mouseenter', function () {
-	            utilHighlightEntities([entityID], true, context);
-	          })
-	          .on('mouseleave', function () {
-	            utilHighlightEntities([entityID], false, context);
-	          })
-	          .on('click', function () {
-	            event.preventDefault();
 
-	            utilHighlightEntities([entityID], false, context);
+	      var node = this._build(data.slice(), 0, data.length - 1, 0);
 
-	            var osmlayer = context.layers().layer('osm');
-	            if (!osmlayer.enabled()) {
-	              osmlayer.enabled(true);
-	            }
+	      if (!this.data.children.length) {
+	        // save as is if tree is empty
+	        this.data = node;
+	      } else if (this.data.height === node.height) {
+	        // split root if trees have the same height
+	        this._splitRoot(this.data, node);
+	      } else {
+	        if (this.data.height < node.height) {
+	          // swap trees if inserted one is bigger
+	          var tmpNode = this.data;
+	          this.data = node;
+	          node = tmpNode;
+	        } // insert the small tree into the large tree at appropriate level
 
-	            context.map().centerZoom(_qaItem.loc, 20);
 
-	            if (entity) {
-	              context.enter(modeSelect(context, [entityID]));
-	            } else {
-	              context.loadEntity(entityID, function () {
-	                context.enter(modeSelect(context, [entityID]));
-	              });
-	            }
-	          });
+	        this._insert(node, this.data.height - node.height - 1, true);
+	      }
 
-	        // Replace with friendly name if possible
-	        // (The entity may not yet be loaded into the graph)
-	        if (entity) {
-	          var name = utilDisplayName(entity);  // try to use common name
+	      return this;
+	    }
+	  }, {
+	    key: "insert",
+	    value: function insert(item) {
+	      if (item) this._insert(item, this.data.height - 1);
+	      return this;
+	    }
+	  }, {
+	    key: "clear",
+	    value: function clear() {
+	      this.data = createNode([]);
+	      return this;
+	    }
+	  }, {
+	    key: "remove",
+	    value: function remove(item, equalsFn) {
+	      if (!item) return this;
+	      var node = this.data;
+	      var bbox = this.toBBox(item);
+	      var path = [];
+	      var indexes = [];
+	      var i, parent, goingUp; // depth-first iterative tree traversal
+
+	      while (node || path.length) {
+	        if (!node) {
+	          // go up
+	          node = path.pop();
+	          parent = path[path.length - 1];
+	          i = indexes.pop();
+	          goingUp = true;
+	        }
+
+	        if (node.leaf) {
+	          // check current node
+	          var index = findItem(item, node.children, equalsFn);
+
+	          if (index !== -1) {
+	            // item found, remove the item and condense tree upwards
+	            node.children.splice(index, 1);
+	            path.push(node);
 
-	          if (!name && !isObjectLink) {
-	            var preset = _mainPresetIndex.match(entity, context.graph());
-	            name = preset && !preset.isFallback() && preset.name();  // fallback to preset name
-	          }
+	            this._condense(path);
 
-	          if (name) {
-	            this.innerText = name;
+	            return this;
 	          }
 	        }
-	      });
 
-	    // Don't hide entities related to this error - #5880
-	    context.features().forceVisible(relatedEntities);
-	    context.map().pan([0,0]);  // trigger a redraw
-	  }
+	        if (!goingUp && !node.leaf && contains(node, bbox)) {
+	          // go down
+	          path.push(node);
+	          indexes.push(i);
+	          i = 0;
+	          parent = node;
+	          node = node.children[0];
+	        } else if (parent) {
+	          // go right
+	          i++;
+	          node = parent.children[i];
+	          goingUp = false;
+	        } else node = null; // nothing found
 
-	  improveOsmDetails.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return improveOsmDetails;
-	  };
+	      }
 
-	  return improveOsmDetails;
-	}
+	      return this;
+	    }
+	  }, {
+	    key: "toBBox",
+	    value: function toBBox(item) {
+	      return item;
+	    }
+	  }, {
+	    key: "compareMinX",
+	    value: function compareMinX(a, b) {
+	      return a.minX - b.minX;
+	    }
+	  }, {
+	    key: "compareMinY",
+	    value: function compareMinY(a, b) {
+	      return a.minY - b.minY;
+	    }
+	  }, {
+	    key: "toJSON",
+	    value: function toJSON() {
+	      return this.data;
+	    }
+	  }, {
+	    key: "fromJSON",
+	    value: function fromJSON(data) {
+	      this.data = data;
+	      return this;
+	    }
+	  }, {
+	    key: "_all",
+	    value: function _all(node, result) {
+	      var nodesToSearch = [];
 
-	function uiImproveOsmHeader() {
-	  var _qaItem;
+	      while (node) {
+	        if (node.leaf) result.push.apply(result, _toConsumableArray(node.children));else nodesToSearch.push.apply(nodesToSearch, _toConsumableArray(node.children));
+	        node = nodesToSearch.pop();
+	      }
 
+	      return result;
+	    }
+	  }, {
+	    key: "_build",
+	    value: function _build(items, left, right, height) {
+	      var N = right - left + 1;
+	      var M = this._maxEntries;
+	      var node;
 
-	  function issueTitle(d) {
-	    var issueKey = d.issueKey;
-	    d.replacements = d.replacements || {};
-	    d.replacements.default = _t('inspector.unknown');  // special key `default` works as a fallback string
-	    return _t(("QA.improveOSM.error_types." + issueKey + ".title"), d.replacements);
-	  }
+	      if (N <= M) {
+	        // reached leaf level; return leaf
+	        node = createNode(items.slice(left, right + 1));
+	        calcBBox(node, this.toBBox);
+	        return node;
+	      }
 
+	      if (!height) {
+	        // target height of the bulk-loaded tree
+	        height = Math.ceil(Math.log(N) / Math.log(M)); // target number of root entries to maximize storage utilization
 
-	  function improveOsmHeader(selection) {
-	    var header = selection.selectAll('.qa-header')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	        M = Math.ceil(N / Math.pow(M, height - 1));
+	      }
 
-	    header.exit()
-	      .remove();
-
-	    var headerEnter = header.enter()
-	      .append('div')
-	        .attr('class', 'qa-header');
-
-	    var svgEnter = headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-icon')
-	        .classed('new', function (d) { return d.id < 0; })
-	      .append('svg')
-	        .attr('width', '20px')
-	        .attr('height', '30px')
-	        .attr('viewbox', '0 0 20 30')
-	        .attr('class', function (d) { return ("preset-icon-28 qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-	    svgEnter
-	      .append('polygon')
-	        .attr('fill', 'currentColor')
-	        .attr('class', 'qaItem-fill')
-	        .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-
-	    svgEnter
-	      .append('use')
-	        .attr('class', 'icon-annotation')
-	        .attr('width', '13px')
-	        .attr('height', '13px')
-	        .attr('transform', 'translate(3.5, 5)')
-	        .attr('xlink:href', function (d) {
-	          var picon = d.icon;
-	          if (!picon) {
-	            return '';
-	          } else {
-	            var isMaki = /^maki-/.test(picon);
-	            return ("#" + picon + (isMaki ? '-11' : ''));
-	          }
-	        });
+	      node = createNode([]);
+	      node.leaf = false;
+	      node.height = height; // split the items into M mostly square tiles
 
-	    headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-label')
-	        .text(issueTitle);
-	  }
+	      var N2 = Math.ceil(N / M);
+	      var N1 = N2 * Math.ceil(Math.sqrt(M));
+	      multiSelect(items, left, right, N1, this.compareMinX);
 
-	  improveOsmHeader.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return improveOsmHeader;
-	  };
+	      for (var i = left; i <= right; i += N1) {
+	        var right2 = Math.min(i + N1 - 1, right);
+	        multiSelect(items, i, right2, N2, this.compareMinY);
 
-	  return improveOsmHeader;
-	}
+	        for (var j = i; j <= right2; j += N2) {
+	          var right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
 
-	function uiImproveOsmEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var qaDetails = uiImproveOsmDetails(context);
-	  var qaComments = uiImproveOsmComments();
-	  var qaHeader = uiImproveOsmHeader();
+	          node.children.push(this._build(items, j, right3, height - 1));
+	        }
+	      }
 
-	  var _qaItem;
+	      calcBBox(node, this.toBBox);
+	      return node;
+	    }
+	  }, {
+	    key: "_chooseSubtree",
+	    value: function _chooseSubtree(bbox, node, level, path) {
+	      while (true) {
+	        path.push(node);
+	        if (node.leaf || path.length - 1 === level) break;
+	        var minArea = Infinity;
+	        var minEnlargement = Infinity;
+	        var targetNode = void 0;
 
-	  function improveOsmEditor(selection) {
+	        for (var i = 0; i < node.children.length; i++) {
+	          var child = node.children[i];
+	          var area = bboxArea(child);
+	          var enlargement = enlargedArea(bbox, child) - area; // choose entry with the least area enlargement
 
-	    var headerEnter = selection.selectAll('.header')
-	      .data([0])
-	      .enter()
-	      .append('div')
-	        .attr('class', 'header fillL');
+	          if (enlargement < minEnlargement) {
+	            minEnlargement = enlargement;
+	            minArea = area < minArea ? area : minArea;
+	            targetNode = child;
+	          } else if (enlargement === minEnlargement) {
+	            // otherwise choose one with the smallest area
+	            if (area < minArea) {
+	              minArea = area;
+	              targetNode = child;
+	            }
+	          }
+	        }
 
-	    headerEnter
-	      .append('button')
-	        .attr('class', 'close')
-	        .on('click', function () { return context.enter(modeBrowse(context)); })
-	        .call(svgIcon('#iD-icon-close'));
+	        node = targetNode || node.children[0];
+	      }
 
-	    headerEnter
-	      .append('h3')
-	        .text(_t('QA.improveOSM.title'));
+	      return node;
+	    }
+	  }, {
+	    key: "_insert",
+	    value: function _insert(item, level, isNode) {
+	      var bbox = isNode ? item : this.toBBox(item);
+	      var insertPath = []; // find the best node for accommodating the item, saving all nodes along the path too
 
-	    var body = selection.selectAll('.body')
-	      .data([0]);
+	      var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
-	    body = body.enter()
-	      .append('div')
-	        .attr('class', 'body')
-	      .merge(body);
 
-	    var editor = body.selectAll('.qa-editor')
-	      .data([0]);
+	      node.children.push(item);
+	      extend$1(node, bbox); // split on node overflow; propagate upwards if necessary
 
-	    editor.enter()
-	      .append('div')
-	        .attr('class', 'modal-section qa-editor')
-	      .merge(editor)
-	        .call(qaHeader.issue(_qaItem))
-	        .call(qaDetails.issue(_qaItem))
-	        .call(qaComments.issue(_qaItem))
-	        .call(improveOsmSaveSection);
-	  }
+	      while (level >= 0) {
+	        if (insertPath[level].children.length > this._maxEntries) {
+	          this._split(insertPath, level);
 
-	  function improveOsmSaveSection(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var isShown = (_qaItem && (isSelected || _qaItem.newComment || _qaItem.comment));
-	    var saveSection = selection.selectAll('.qa-save')
-	      .data(
-	        (isShown ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	          level--;
+	        } else break;
+	      } // adjust bboxes along the insertion path
 
-	    // exit
-	    saveSection.exit()
-	      .remove();
 
-	    // enter
-	    var saveSectionEnter = saveSection.enter()
-	      .append('div')
-	        .attr('class', 'qa-save save-section cf');
-
-	    saveSectionEnter
-	      .append('h4')
-	        .attr('class', '.qa-save-header')
-	        .text(_t('note.newComment'));
-
-	    saveSectionEnter
-	      .append('textarea')
-	        .attr('class', 'new-comment-input')
-	        .attr('placeholder', _t('QA.keepRight.comment_placeholder'))
-	        .attr('maxlength', 1000)
-	        .property('value', function (d) { return d.newComment; })
-	        .call(utilNoAuto)
-	        .on('input', changeInput)
-	        .on('blur', changeInput);
+	      this._adjustParentBBoxes(bbox, insertPath, level);
+	    } // split overflowed node into two
 
-	    // update
-	    saveSection = saveSectionEnter
-	      .merge(saveSection)
-	        .call(qaSaveButtons);
+	  }, {
+	    key: "_split",
+	    value: function _split(insertPath, level) {
+	      var node = insertPath[level];
+	      var M = node.children.length;
+	      var m = this._minEntries;
 
-	    function changeInput() {
-	      var input = select(this);
-	      var val = input.property('value').trim();
+	      this._chooseSplitAxis(node, m, M);
 
-	      if (val === '') {
-	        val = undefined;
+	      var splitIndex = this._chooseSplitIndex(node, m, M);
+
+	      var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));
+	      newNode.height = node.height;
+	      newNode.leaf = node.leaf;
+	      calcBBox(node, this.toBBox);
+	      calcBBox(newNode, this.toBBox);
+	      if (level) insertPath[level - 1].children.push(newNode);else this._splitRoot(node, newNode);
+	    }
+	  }, {
+	    key: "_splitRoot",
+	    value: function _splitRoot(node, newNode) {
+	      // split root node
+	      this.data = createNode([node, newNode]);
+	      this.data.height = node.height + 1;
+	      this.data.leaf = false;
+	      calcBBox(this.data, this.toBBox);
+	    }
+	  }, {
+	    key: "_chooseSplitIndex",
+	    value: function _chooseSplitIndex(node, m, M) {
+	      var index;
+	      var minOverlap = Infinity;
+	      var minArea = Infinity;
+
+	      for (var i = m; i <= M - m; i++) {
+	        var bbox1 = distBBox(node, 0, i, this.toBBox);
+	        var bbox2 = distBBox(node, i, M, this.toBBox);
+	        var overlap = intersectionArea(bbox1, bbox2);
+	        var area = bboxArea(bbox1) + bboxArea(bbox2); // choose distribution with minimum overlap
+
+	        if (overlap < minOverlap) {
+	          minOverlap = overlap;
+	          index = i;
+	          minArea = area < minArea ? area : minArea;
+	        } else if (overlap === minOverlap) {
+	          // otherwise choose distribution with minimum area
+	          if (area < minArea) {
+	            minArea = area;
+	            index = i;
+	          }
+	        }
 	      }
 
-	      // store the unsaved comment with the issue itself
-	      _qaItem = _qaItem.update({ newComment: val });
+	      return index || M - m;
+	    } // sorts node children by the best axis for split
 
-	      var qaService = services.improveOSM;
-	      if (qaService) {
-	        qaService.replaceItem(_qaItem);
+	  }, {
+	    key: "_chooseSplitAxis",
+	    value: function _chooseSplitAxis(node, m, M) {
+	      var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
+	      var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;
+
+	      var xMargin = this._allDistMargin(node, m, M, compareMinX);
+
+	      var yMargin = this._allDistMargin(node, m, M, compareMinY); // if total distributions margin value is minimal for x, sort by minX,
+	      // otherwise it's already sorted by minY
+
+
+	      if (xMargin < yMargin) node.children.sort(compareMinX);
+	    } // total margin of all possible split distributions where each node is at least m full
+
+	  }, {
+	    key: "_allDistMargin",
+	    value: function _allDistMargin(node, m, M, compare) {
+	      node.children.sort(compare);
+	      var toBBox = this.toBBox;
+	      var leftBBox = distBBox(node, 0, m, toBBox);
+	      var rightBBox = distBBox(node, M - m, M, toBBox);
+	      var margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);
+
+	      for (var i = m; i < M - m; i++) {
+	        var child = node.children[i];
+	        extend$1(leftBBox, node.leaf ? toBBox(child) : child);
+	        margin += bboxMargin(leftBBox);
 	      }
 
-	      saveSection
-	        .call(qaSaveButtons);
-	    }
-	  }
+	      for (var _i = M - m - 1; _i >= m; _i--) {
+	        var _child = node.children[_i];
+	        extend$1(rightBBox, node.leaf ? toBBox(_child) : _child);
+	        margin += bboxMargin(rightBBox);
+	      }
 
-	  function qaSaveButtons(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var buttonSection = selection.selectAll('.buttons')
-	      .data((isSelected ? [_qaItem] : []), function (d) { return d.status + d.id; });
+	      return margin;
+	    }
+	  }, {
+	    key: "_adjustParentBBoxes",
+	    value: function _adjustParentBBoxes(bbox, path, level) {
+	      // adjust bboxes along the given tree path
+	      for (var i = level; i >= 0; i--) {
+	        extend$1(path[i], bbox);
+	      }
+	    }
+	  }, {
+	    key: "_condense",
+	    value: function _condense(path) {
+	      // go through the path, removing empty nodes and updating bboxes
+	      for (var i = path.length - 1, siblings; i >= 0; i--) {
+	        if (path[i].children.length === 0) {
+	          if (i > 0) {
+	            siblings = path[i - 1].children;
+	            siblings.splice(siblings.indexOf(path[i]), 1);
+	          } else this.clear();
+	        } else calcBBox(path[i], this.toBBox);
+	      }
+	    }
+	  }]);
 
-	    // exit
-	    buttonSection.exit()
-	      .remove();
+	  return RBush;
+	}();
 
-	    // enter
-	    var buttonEnter = buttonSection.enter()
-	      .append('div')
-	        .attr('class', 'buttons');
+	function findItem(item, items, equalsFn) {
+	  if (!equalsFn) return items.indexOf(item);
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button comment-button action')
-	        .text(_t('QA.keepRight.save_comment'));
+	  for (var i = 0; i < items.length; i++) {
+	    if (equalsFn(item, items[i])) return i;
+	  }
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button close-button action');
+	  return -1;
+	} // calculate node's bbox from bboxes of its children
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button ignore-button action');
 
-	    // update
-	    buttonSection = buttonSection
-	      .merge(buttonEnter);
+	function calcBBox(node, toBBox) {
+	  distBBox(node, 0, node.children.length, toBBox, node);
+	} // min bounding rectangle of node children from k to p-1
 
-	    buttonSection.select('.comment-button')
-	      .attr('disabled', function (d) { return d.newComment ? null : true; })
-	      .on('click.comment', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.improveOSM;
-	        if (qaService) {
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
 
-	    buttonSection.select('.close-button')
-	      .text(function (d) {
-	        var andComment = (d.newComment ? '_comment' : '');
-	        return _t(("QA.keepRight.close" + andComment));
-	      })
-	      .on('click.close', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.improveOSM;
-	        if (qaService) {
-	          d.newStatus = 'SOLVED';
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
+	function distBBox(node, k, p, toBBox, destNode) {
+	  if (!destNode) destNode = createNode(null);
+	  destNode.minX = Infinity;
+	  destNode.minY = Infinity;
+	  destNode.maxX = -Infinity;
+	  destNode.maxY = -Infinity;
 
-	    buttonSection.select('.ignore-button')
-	      .text(function (d) {
-	        var andComment = (d.newComment ? '_comment' : '');
-	        return _t(("QA.keepRight.ignore" + andComment));
-	      })
-	      .on('click.ignore', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.improveOSM;
-	        if (qaService) {
-	          d.newStatus = 'INVALID';
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
+	  for (var i = k; i < p; i++) {
+	    var child = node.children[i];
+	    extend$1(destNode, node.leaf ? toBBox(child) : child);
 	  }
 
-	  // NOTE: Don't change method name until UI v3 is merged
-	  improveOsmEditor.error = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return improveOsmEditor;
-	  };
+	  return destNode;
+	}
 
-	  return utilRebind(improveOsmEditor, dispatch$1, 'on');
+	function extend$1(a, b) {
+	  a.minX = Math.min(a.minX, b.minX);
+	  a.minY = Math.min(a.minY, b.minY);
+	  a.maxX = Math.max(a.maxX, b.maxX);
+	  a.maxY = Math.max(a.maxY, b.maxY);
+	  return a;
 	}
 
-	function uiKeepRightDetails(context) {
-	  var _qaItem;
+	function compareNodeMinX(a, b) {
+	  return a.minX - b.minX;
+	}
 
+	function compareNodeMinY(a, b) {
+	  return a.minY - b.minY;
+	}
 
-	  function issueDetail(d) {
-	    var itemType = d.itemType;
-	    var parentIssueType = d.parentIssueType;
-	    var unknown = _t('inspector.unknown');
-	    var replacements = d.replacements || {};
-	    replacements.default = unknown;  // special key `default` works as a fallback string
+	function bboxArea(a) {
+	  return (a.maxX - a.minX) * (a.maxY - a.minY);
+	}
 
-	    var detail = _t(("QA.keepRight.errorTypes." + itemType + ".description"), replacements);
-	    if (detail === unknown) {
-	      detail = _t(("QA.keepRight.errorTypes." + parentIssueType + ".description"), replacements);
-	    }
-	    return detail;
-	  }
+	function bboxMargin(a) {
+	  return a.maxX - a.minX + (a.maxY - a.minY);
+	}
 
+	function enlargedArea(a, b) {
+	  return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) * (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
+	}
 
-	  function keepRightDetails(selection) {
-	    var details = selection.selectAll('.error-details')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	function intersectionArea(a, b) {
+	  var minX = Math.max(a.minX, b.minX);
+	  var minY = Math.max(a.minY, b.minY);
+	  var maxX = Math.min(a.maxX, b.maxX);
+	  var maxY = Math.min(a.maxY, b.maxY);
+	  return Math.max(0, maxX - minX) * Math.max(0, maxY - minY);
+	}
 
-	    details.exit()
-	      .remove();
+	function contains(a, b) {
+	  return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+	}
 
-	    var detailsEnter = details.enter()
-	      .append('div')
-	        .attr('class', 'error-details qa-details-container');
+	function intersects(a, b) {
+	  return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+	}
 
-	    // description
-	    var descriptionEnter = detailsEnter
-	      .append('div')
-	        .attr('class', 'qa-details-subsection');
+	function createNode(children) {
+	  return {
+	    children: children,
+	    height: 1,
+	    leaf: true,
+	    minX: Infinity,
+	    minY: Infinity,
+	    maxX: -Infinity,
+	    maxY: -Infinity
+	  };
+	} // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
+	// combines selection algorithm with binary divide & conquer approach
 
-	    descriptionEnter
-	      .append('h4')
-	        .text(function () { return _t('QA.keepRight.detail_description'); });
 
-	    descriptionEnter
-	      .append('div')
-	        .attr('class', 'qa-details-description-text')
-	        .html(issueDetail);
+	function multiSelect(arr, left, right, n, compare) {
+	  var stack = [left, right];
 
-	    // If there are entity links in the error message..
-	    var relatedEntities = [];
-	    descriptionEnter.selectAll('.error_entity_link, .error_object_link')
-	      .each(function() {
-	        var link = select(this);
-	        var isObjectLink = link.classed('error_object_link');
-	        var entityID = isObjectLink ?
-	          (utilEntityRoot(_qaItem.objectType) + _qaItem.objectId)
-	          : this.textContent;
-	        var entity = context.hasEntity(entityID);
+	  while (stack.length) {
+	    right = stack.pop();
+	    left = stack.pop();
+	    if (right - left <= n) continue;
+	    var mid = left + Math.ceil((right - left) / n / 2) * n;
+	    quickselect(arr, mid, left, right, compare);
+	    stack.push(left, mid, mid, right);
+	  }
+	}
 
-	        relatedEntities.push(entityID);
+	function responseText(response) {
+	  if (!response.ok) throw new Error(response.status + " " + response.statusText);
+	  return response.text();
+	}
 
-	        // Add click handler
-	        link
-	          .on('mouseenter', function () {
-	            utilHighlightEntities([entityID], true, context);
-	          })
-	          .on('mouseleave', function () {
-	            utilHighlightEntities([entityID], false, context);
-	          })
-	          .on('click', function () {
-	            event.preventDefault();
+	function d3_text (input, init) {
+	  return fetch(input, init).then(responseText);
+	}
 
-	            utilHighlightEntities([entityID], false, context);
+	function responseJson(response) {
+	  if (!response.ok) throw new Error(response.status + " " + response.statusText);
+	  if (response.status === 204 || response.status === 205) return;
+	  return response.json();
+	}
 
-	            var osmlayer = context.layers().layer('osm');
-	            if (!osmlayer.enabled()) {
-	              osmlayer.enabled(true);
-	            }
+	function d3_json (input, init) {
+	  return fetch(input, init).then(responseJson);
+	}
 
-	            context.map().centerZoomEase(_qaItem.loc, 20);
+	function parser(type) {
+	  return function (input, init) {
+	    return d3_text(input, init).then(function (text) {
+	      return new DOMParser().parseFromString(text, type);
+	    });
+	  };
+	}
 
-	            if (entity) {
-	              context.enter(modeSelect(context, [entityID]));
-	            } else {
-	              context.loadEntity(entityID, function () {
-	                context.enter(modeSelect(context, [entityID]));
-	              });
-	            }
-	          });
+	var d3_xml = parser("application/xml");
+	var svg = parser("image/svg+xml");
 
-	        // Replace with friendly name if possible
-	        // (The entity may not yet be loaded into the graph)
-	        if (entity) {
-	          var name = utilDisplayName(entity);  // try to use common name
+	var tiler$6 = utilTiler();
+	var dispatch$7 = dispatch$8('loaded');
+	var _tileZoom$3 = 14;
+	var _krUrlRoot = 'https://www.keepright.at';
+	var _krData = {
+	  errorTypes: {},
+	  localizeStrings: {}
+	}; // This gets reassigned if reset
 
-	          if (!name && !isObjectLink) {
-	            var preset = _mainPresetIndex.match(entity, context.graph());
-	            name = preset && !preset.isFallback() && preset.name();  // fallback to preset name
-	          }
+	var _cache$2;
 
-	          if (name) {
-	            this.innerText = name;
-	          }
-	        }
-	      });
+	var _krRuleset = [// no 20 - multiple node on same spot - these are mostly boundaries overlapping roads
+	30, 40, 50, 60, 70, 90, 100, 110, 120, 130, 150, 160, 170, 180, 190, 191, 192, 193, 194, 195, 196, 197, 198, 200, 201, 202, 203, 204, 205, 206, 207, 208, 210, 220, 230, 231, 232, 270, 280, 281, 282, 283, 284, 285, 290, 291, 292, 293, 294, 295, 296, 297, 298, 300, 310, 311, 312, 313, 320, 350, 360, 370, 380, 390, 400, 401, 402, 410, 411, 412, 413];
 
-	    // Don't hide entities related to this issue - #5880
-	    context.features().forceVisible(relatedEntities);
-	    context.map().pan([0,0]);  // trigger a redraw
+	function abortRequest$6(controller) {
+	  if (controller) {
+	    controller.abort();
 	  }
+	}
 
-	  keepRightDetails.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return keepRightDetails;
-	  };
+	function abortUnwantedRequests$3(cache, tiles) {
+	  Object.keys(cache.inflightTile).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k === tile.id;
+	    });
 
-	  return keepRightDetails;
+	    if (!wanted) {
+	      abortRequest$6(cache.inflightTile[k]);
+	      delete cache.inflightTile[k];
+	    }
+	  });
 	}
 
-	function uiKeepRightHeader() {
-	  var _qaItem;
+	function encodeIssueRtree$2(d) {
+	  return {
+	    minX: d.loc[0],
+	    minY: d.loc[1],
+	    maxX: d.loc[0],
+	    maxY: d.loc[1],
+	    data: d
+	  };
+	} // Replace or remove QAItem from rtree
 
 
-	  function issueTitle(d) {
-	    var itemType = d.itemType;
-	    var parentIssueType = d.parentIssueType;
-	    var unknown = _t('inspector.unknown');
-	    var replacements = d.replacements || {};
-	    replacements.default = unknown;  // special key `default` works as a fallback string
+	function updateRtree$3(item, replace) {
+	  _cache$2.rtree.remove(item, function (a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
-	    var title = _t(("QA.keepRight.errorTypes." + itemType + ".title"), replacements);
-	    if (title === unknown) {
-	      title = _t(("QA.keepRight.errorTypes." + parentIssueType + ".title"), replacements);
-	    }
-	    return title;
+	  if (replace) {
+	    _cache$2.rtree.insert(item);
 	  }
+	}
 
+	function tokenReplacements(d) {
+	  if (!(d instanceof QAItem)) return;
+	  var replacements = {};
+	  var issueTemplate = _krData.errorTypes[d.whichType];
 
-	  function keepRightHeader(selection) {
-	    var header = selection.selectAll('.qa-header')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
-
-	    header.exit()
-	      .remove();
+	  if (!issueTemplate) {
+	    /* eslint-disable no-console */
+	    console.log('No Template: ', d.whichType);
+	    console.log('  ', d.description);
+	    /* eslint-enable no-console */
 
-	    var headerEnter = header.enter()
-	      .append('div')
-	        .attr('class', 'qa-header');
+	    return;
+	  } // some descriptions are just fixed text
 
-	    var iconEnter = headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-icon')
-	        .classed('new', function (d) { return d.id < 0; });
 
-	    iconEnter
-	      .append('div')
-	        .attr('class', function (d) { return ("preset-icon-28 qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.parentIssueType)); })
-	        .call(svgIcon('#iD-icon-bolt', 'qaItem-fill'));
+	  if (!issueTemplate.regex) return; // regex pattern should match description with variable details captured
 
-	    headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-label')
-	        .text(issueTitle);
-	  }
+	  var errorRegex = new RegExp(issueTemplate.regex, 'i');
+	  var errorMatch = errorRegex.exec(d.description);
 
+	  if (!errorMatch) {
+	    /* eslint-disable no-console */
+	    console.log('Unmatched: ', d.whichType);
+	    console.log('  ', d.description);
+	    console.log('  ', errorRegex);
+	    /* eslint-enable no-console */
 
-	  keepRightHeader.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return keepRightHeader;
-	  };
+	    return;
+	  }
 
-	  return keepRightHeader;
-	}
+	  for (var i = 1; i < errorMatch.length; i++) {
+	    // skip first
+	    var capture = errorMatch[i];
+	    var idType = void 0;
+	    idType = 'IDs' in issueTemplate ? issueTemplate.IDs[i - 1] : '';
 
-	function uiViewOnKeepRight() {
-	  var _qaItem;
+	    if (idType && capture) {
+	      // link IDs if present in the capture
+	      capture = parseError(capture, idType);
+	    } else {
+	      var compare = capture.toLowerCase();
 
-	  function viewOnKeepRight(selection) {
-	    var url;
-	    if (services.keepRight && (_qaItem instanceof QAItem)) {
-	      url = services.keepRight.issueURL(_qaItem);
+	      if (_krData.localizeStrings[compare]) {
+	        // some replacement strings can be localized
+	        capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+	      } else {
+	        capture = unescape$3(capture);
+	      }
 	    }
 
-	    var link = selection.selectAll('.view-on-keepRight')
-	      .data(url ? [url] : []);
-
-	    // exit
-	    link.exit()
-	      .remove();
-
-	    // enter
-	    var linkEnter = link.enter()
-	      .append('a')
-	        .attr('class', 'view-on-keepRight')
-	        .attr('target', '_blank')
-	        .attr('rel', 'noopener') // security measure
-	        .attr('href', function (d) { return d; })
-	        .call(svgIcon('#iD-icon-out-link', 'inline'));
-
-	    linkEnter
-	      .append('span')
-	        .text(_t('inspector.view_on_keepRight'));
+	    replacements['var' + i] = capture;
 	  }
 
-	  viewOnKeepRight.what = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return viewOnKeepRight;
-	  };
-
-	  return viewOnKeepRight;
+	  return replacements;
 	}
 
-	function uiKeepRightEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var qaDetails = uiKeepRightDetails(context);
-	  var qaHeader = uiKeepRightHeader();
-
-	  var _qaItem;
+	function parseError(capture, idType) {
+	  var compare = capture.toLowerCase();
 
-	  function keepRightEditor(selection) {
+	  if (_krData.localizeStrings[compare]) {
+	    // some replacement strings can be localized
+	    capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+	  }
 
-	    var headerEnter = selection.selectAll('.header')
-	      .data([0])
-	      .enter()
-	      .append('div')
-	        .attr('class', 'header fillL');
+	  switch (idType) {
+	    // link a string like "this node"
+	    case 'this':
+	      capture = linkErrorObject(capture);
+	      break;
 
-	    headerEnter
-	      .append('button')
-	        .attr('class', 'close')
-	        .on('click', function () { return context.enter(modeBrowse(context)); })
-	        .call(svgIcon('#iD-icon-close'));
+	    case 'url':
+	      capture = linkURL(capture);
+	      break;
+	    // link an entity ID
 
-	    headerEnter
-	      .append('h3')
-	        .text(_t('QA.keepRight.title'));
+	    case 'n':
+	    case 'w':
+	    case 'r':
+	      capture = linkEntity(idType + capture);
+	      break;
+	    // some errors have more complex ID lists/variance
 
+	    case '20':
+	      capture = parse20(capture);
+	      break;
 
-	    var body = selection.selectAll('.body')
-	      .data([0]);
+	    case '211':
+	      capture = parse211(capture);
+	      break;
 
-	    body = body.enter()
-	      .append('div')
-	        .attr('class', 'body')
-	      .merge(body);
+	    case '231':
+	      capture = parse231(capture);
+	      break;
 
-	    var editor = body.selectAll('.qa-editor')
-	      .data([0]);
+	    case '294':
+	      capture = parse294(capture);
+	      break;
 
-	    editor.enter()
-	      .append('div')
-	        .attr('class', 'modal-section qa-editor')
-	      .merge(editor)
-	        .call(qaHeader.issue(_qaItem))
-	        .call(qaDetails.issue(_qaItem))
-	        .call(keepRightSaveSection);
+	    case '370':
+	      capture = parse370(capture);
+	      break;
+	  }
 
+	  return capture;
 
-	    var footer = selection.selectAll('.footer')
-	      .data([0]);
+	  function linkErrorObject(d) {
+	    return {
+	      html: "<a class=\"error_object_link\">".concat(d, "</a>")
+	    };
+	  }
 
-	    footer.enter()
-	      .append('div')
-	      .attr('class', 'footer')
-	      .merge(footer)
-	      .call(uiViewOnKeepRight().what(_qaItem));
+	  function linkEntity(d) {
+	    return {
+	      html: "<a class=\"error_entity_link\">".concat(d, "</a>")
+	    };
 	  }
 
+	  function linkURL(d) {
+	    return {
+	      html: "<a class=\"kr_external_link\" target=\"_blank\" href=\"".concat(d, "\">").concat(d, "</a>")
+	    };
+	  } // arbitrary node list of form: #ID, #ID, #ID...
 
-	  function keepRightSaveSection(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var isShown = (_qaItem && (isSelected || _qaItem.newComment || _qaItem.comment));
-	    var saveSection = selection.selectAll('.qa-save')
-	      .data(
-	        (isShown ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
 
-	    // exit
-	    saveSection.exit()
-	      .remove();
+	  function parse211(capture) {
+	    var newList = [];
+	    var items = capture.split(', ');
+	    items.forEach(function (item) {
+	      // ID has # at the front
+	      var id = linkEntity('n' + item.slice(1));
+	      newList.push(id);
+	    });
+	    return newList.join(', ');
+	  } // arbitrary way list of form: #ID(layer),#ID(layer),#ID(layer)...
 
-	    // enter
-	    var saveSectionEnter = saveSection.enter()
-	      .append('div')
-	        .attr('class', 'qa-save save-section cf');
-
-	    saveSectionEnter
-	      .append('h4')
-	        .attr('class', '.qa-save-header')
-	        .text(_t('QA.keepRight.comment'));
-
-	    saveSectionEnter
-	      .append('textarea')
-	        .attr('class', 'new-comment-input')
-	        .attr('placeholder', _t('QA.keepRight.comment_placeholder'))
-	        .attr('maxlength', 1000)
-	        .property('value', function (d) { return d.newComment || d.comment; })
-	        .call(utilNoAuto)
-	        .on('input', changeInput)
-	        .on('blur', changeInput);
 
-	    // update
-	    saveSection = saveSectionEnter
-	      .merge(saveSection)
-	        .call(qaSaveButtons);
+	  function parse231(capture) {
+	    var newList = []; // unfortunately 'layer' can itself contain commas, so we split on '),'
 
-	    function changeInput() {
-	      var input = select(this);
-	      var val = input.property('value').trim();
+	    var items = capture.split('),');
+	    items.forEach(function (item) {
+	      var match = item.match(/\#(\d+)\((.+)\)?/);
 
-	      if (val === _qaItem.comment) {
-	        val = undefined;
+	      if (match !== null && match.length > 2) {
+	        newList.push(linkEntity('w' + match[1]) + ' ' + _t('QA.keepRight.errorTypes.231.layer', {
+	          layer: match[2]
+	        }));
 	      }
+	    });
+	    return newList.join(', ');
+	  } // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #ID...
 
-	      // store the unsaved comment with the issue itself
-	      _qaItem = _qaItem.update({ newComment: val });
 
-	      var qaService = services.keepRight;
-	      if (qaService) {
-	        qaService.replaceItem(_qaItem);  // update keepright cache
-	      }
+	  function parse294(capture) {
+	    var newList = [];
+	    var items = capture.split(',');
+	    items.forEach(function (item) {
+	      // item of form "from/to node/relation #ID"
+	      item = item.split(' '); // to/from role is more clear in quotes
 
-	      saveSection
-	        .call(qaSaveButtons);
-	    }
-	  }
+	      var role = "\"".concat(item[0], "\""); // first letter of node/relation provides the type
 
+	      var idType = item[1].slice(0, 1); // ID has # at the front
 
-	  function qaSaveButtons(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var buttonSection = selection.selectAll('.buttons')
-	      .data((isSelected ? [_qaItem] : []), function (d) { return d.status + d.id; });
+	      var id = item[2].slice(1);
+	      id = linkEntity(idType + id);
+	      newList.push("".concat(role, " ").concat(item[1], " ").concat(id));
+	    });
+	    return newList.join(', ');
+	  } // may or may not include the string "(including the name 'name')"
 
-	    // exit
-	    buttonSection.exit()
-	      .remove();
 
-	    // enter
-	    var buttonEnter = buttonSection.enter()
-	      .append('div')
-	        .attr('class', 'buttons');
+	  function parse370(capture) {
+	    if (!capture) return '';
+	    var match = capture.match(/\(including the name (\'.+\')\)/);
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button comment-button action')
-	        .text(_t('QA.keepRight.save_comment'));
+	    if (match && match.length) {
+	      return _t('QA.keepRight.errorTypes.370.including_the_name', {
+	        name: match[1]
+	      });
+	    }
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button close-button action');
+	    return '';
+	  } // arbitrary node list of form: #ID,#ID,#ID...
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button ignore-button action');
 
-	    // update
-	    buttonSection = buttonSection
-	      .merge(buttonEnter);
+	  function parse20(capture) {
+	    var newList = [];
+	    var items = capture.split(',');
+	    items.forEach(function (item) {
+	      // ID has # at the front
+	      var id = linkEntity('n' + item.slice(1));
+	      newList.push(id);
+	    });
+	    return newList.join(', ');
+	  }
+	}
 
-	    buttonSection.select('.comment-button')   // select and propagate data
-	      .attr('disabled', function (d) { return d.newComment ? null : true; })
-	      .on('click.comment', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.keepRight;
-	        if (qaService) {
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
+	var serviceKeepRight = {
+	  title: 'keepRight',
+	  init: function init() {
+	    _mainFileFetcher.get('keepRight').then(function (d) {
+	      return _krData = d;
+	    });
 
-	    buttonSection.select('.close-button')   // select and propagate data
-	      .text(function (d) {
-	        var andComment = (d.newComment ? '_comment' : '');
-	        return _t(("QA.keepRight.close" + andComment));
-	      })
-	      .on('click.close', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.keepRight;
-	        if (qaService) {
-	          d.newStatus = 'ignore_t';   // ignore temporarily (item fixed)
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
+	    if (!_cache$2) {
+	      this.reset();
+	    }
 
-	    buttonSection.select('.ignore-button')   // select and propagate data
-	      .text(function (d) {
-	        var andComment = (d.newComment ? '_comment' : '');
-	        return _t(("QA.keepRight.ignore" + andComment));
-	      })
-	      .on('click.ignore', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.keepRight;
-	        if (qaService) {
-	          d.newStatus = 'ignore';   // ignore permanently (false positive)
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
-	  }
+	    this.event = utilRebind(this, dispatch$7, 'on');
+	  },
+	  reset: function reset() {
+	    if (_cache$2) {
+	      Object.values(_cache$2.inflightTile).forEach(abortRequest$6);
+	    }
 
-	  // NOTE: Don't change method name until UI v3 is merged
-	  keepRightEditor.error = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return keepRightEditor;
-	  };
+	    _cache$2 = {
+	      data: {},
+	      loadedTile: {},
+	      inflightTile: {},
+	      inflightPost: {},
+	      closed: {},
+	      rtree: new RBush()
+	    };
+	  },
+	  // KeepRight API:  http://osm.mueschelsoft.de/keepright/interfacing.php
+	  loadIssues: function loadIssues(projection) {
+	    var _this = this;
 
-	  return utilRebind(keepRightEditor, dispatch$1, 'on');
-	}
+	    var options = {
+	      format: 'geojson',
+	      ch: _krRuleset
+	    }; // determine the needed tiles to cover the view
 
-	function uiOsmoseDetails(context) {
-	  var _qaItem;
+	    var tiles = tiler$6.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	  function issueString(d, type) {
-	    if (!d) { return ''; }
+	    abortUnwantedRequests$3(_cache$2, tiles); // issue new requests..
 
-	    // Issue strings are cached from Osmose API
-	    var s = services.osmose.getStrings(d.itemType);
-	    return (type in s) ? s[type] : '';
-	  }
+	    tiles.forEach(function (tile) {
+	      if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) return;
+
+	      var _tile$extent$rectangl = tile.extent.rectangle(),
+	          _tile$extent$rectangl2 = _slicedToArray(_tile$extent$rectangl, 4),
+	          left = _tile$extent$rectangl2[0],
+	          top = _tile$extent$rectangl2[1],
+	          right = _tile$extent$rectangl2[2],
+	          bottom = _tile$extent$rectangl2[3];
+
+	      var params = Object.assign({}, options, {
+	        left: left,
+	        bottom: bottom,
+	        right: right,
+	        top: top
+	      });
+	      var url = "".concat(_krUrlRoot, "/export.php?") + utilQsString(params);
+	      var controller = new AbortController();
+	      _cache$2.inflightTile[tile.id] = controller;
+	      d3_json(url, {
+	        signal: controller.signal
+	      }).then(function (data) {
+	        delete _cache$2.inflightTile[tile.id];
+	        _cache$2.loadedTile[tile.id] = true;
+
+	        if (!data || !data.features || !data.features.length) {
+	          throw new Error('No Data');
+	        }
+
+	        data.features.forEach(function (feature) {
+	          var _feature$properties = feature.properties,
+	              itemType = _feature$properties.error_type,
+	              id = _feature$properties.error_id,
+	              _feature$properties$c = _feature$properties.comment,
+	              comment = _feature$properties$c === void 0 ? null : _feature$properties$c,
+	              objectId = _feature$properties.object_id,
+	              objectType = _feature$properties.object_type,
+	              schema = _feature$properties.schema,
+	              title = _feature$properties.title;
+	          var loc = feature.geometry.coordinates,
+	              _feature$properties$d = feature.properties.description,
+	              description = _feature$properties$d === void 0 ? '' : _feature$properties$d; // if there is a parent, save its error type e.g.:
+	          //  Error 191 = "highway-highway"
+	          //  Error 190 = "intersections without junctions"  (parent)
+
+	          var issueTemplate = _krData.errorTypes[itemType];
+	          var parentIssueType = (Math.floor(itemType / 10) * 10).toString(); // try to handle error type directly, fallback to parent error type.
+
+	          var whichType = issueTemplate ? itemType : parentIssueType;
+	          var whichTemplate = _krData.errorTypes[whichType]; // Rewrite a few of the errors at this point..
+	          // This is done to make them easier to linkify and translate.
+
+	          switch (whichType) {
+	            case '170':
+	              description = "This feature has a FIXME tag: ".concat(description);
+	              break;
 
+	            case '292':
+	            case '293':
+	              description = description.replace('A turn-', 'This turn-');
+	              break;
 
-	  function osmoseDetails(selection) {
-	    var details = selection.selectAll('.error-details')
-	      .data(
-	        _qaItem ? [_qaItem] : [],
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	            case '294':
+	            case '295':
+	            case '296':
+	            case '297':
+	            case '298':
+	              description = "This turn-restriction~".concat(description);
+	              break;
 
-	    details.exit()
-	      .remove();
+	            case '300':
+	              description = 'This highway is missing a maxspeed tag';
+	              break;
 
-	    var detailsEnter = details.enter()
-	      .append('div')
-	        .attr('class', 'error-details qa-details-container');
+	            case '411':
+	            case '412':
+	            case '413':
+	              description = "This feature~".concat(description);
+	              break;
+	          } // move markers slightly so it doesn't obscure the geometry,
+	          // then move markers away from other coincident markers
+
+
+	          var coincident = false;
+
+	          do {
+	            // first time, move marker up. after that, move marker right.
+	            var delta = coincident ? [0.00001, 0] : [0, 0.00001];
+	            loc = geoVecAdd(loc, delta);
+	            var bbox = geoExtent(loc).bbox();
+	            coincident = _cache$2.rtree.search(bbox).length;
+	          } while (coincident);
+
+	          var d = new QAItem(loc, _this, itemType, id, {
+	            comment: comment,
+	            description: description,
+	            whichType: whichType,
+	            parentIssueType: parentIssueType,
+	            severity: whichTemplate.severity || 'error',
+	            objectId: objectId,
+	            objectType: objectType,
+	            schema: schema,
+	            title: title
+	          });
+	          d.replacements = tokenReplacements(d);
+	          _cache$2.data[id] = d;
 
+	          _cache$2.rtree.insert(encodeIssueRtree$2(d));
+	        });
+	        dispatch$7.call('loaded');
+	      })["catch"](function () {
+	        delete _cache$2.inflightTile[tile.id];
+	        _cache$2.loadedTile[tile.id] = true;
+	      });
+	    });
+	  },
+	  postUpdate: function postUpdate(d, callback) {
+	    var _this2 = this;
 
-	    // Description
-	    if (issueString(_qaItem, 'detail')) {
-	      var div = detailsEnter
-	        .append('div')
-	          .attr('class', 'qa-details-subsection');
+	    if (_cache$2.inflightPost[d.id]) {
+	      return callback({
+	        message: 'Error update already inflight',
+	        status: -2
+	      }, d);
+	    }
 
-	      div
-	        .append('h4')
-	          .text(function () { return _t('QA.keepRight.detail_description'); });
+	    var params = {
+	      schema: d.schema,
+	      id: d.id
+	    };
 
-	      div
-	        .append('p')
-	          .attr('class', 'qa-details-description-text')
-	          .html(function (d) { return issueString(d, 'detail'); })
-	        .selectAll('a')
-	          .attr('rel', 'noopener')
-	          .attr('target', '_blank');
+	    if (d.newStatus) {
+	      params.st = d.newStatus;
 	    }
 
-	    // Elements (populated later as data is requested)
-	    var detailsDiv = detailsEnter
-	      .append('div')
-	        .attr('class', 'qa-details-subsection');
-
-	    var elemsDiv = detailsEnter
-	      .append('div')
-	        .attr('class', 'qa-details-subsection');
+	    if (d.newComment !== undefined) {
+	      params.co = d.newComment;
+	    } // NOTE: This throws a CORS err, but it seems successful.
+	    // We don't care too much about the response, so this is fine.
 
-	    // Suggested Fix (musn't exist for every issue type)
-	    if (issueString(_qaItem, 'fix')) {
-	      var div$1 = detailsEnter
-	        .append('div')
-	          .attr('class', 'qa-details-subsection');
 
-	      div$1
-	        .append('h4')
-	          .text(function () { return _t('QA.osmose.fix_title'); });
+	    var url = "".concat(_krUrlRoot, "/comment.php?") + utilQsString(params);
+	    var controller = new AbortController();
+	    _cache$2.inflightPost[d.id] = controller; // Since this is expected to throw an error just continue as if it worked
+	    // (worst case scenario the request truly fails and issue will show up if iD restarts)
 
-	      div$1
-	        .append('p')
-	          .html(function (d) { return issueString(d, 'fix'); })
-	        .selectAll('a')
-	          .attr('rel', 'noopener')
-	          .attr('target', '_blank');
-	    }
+	    d3_json(url, {
+	      signal: controller.signal
+	    })["finally"](function () {
+	      delete _cache$2.inflightPost[d.id];
 
-	    // Common Pitfalls (musn't exist for every issue type)
-	    if (issueString(_qaItem, 'trap')) {
-	      var div$2 = detailsEnter
-	        .append('div')
-	          .attr('class', 'qa-details-subsection');
+	      if (d.newStatus === 'ignore') {
+	        // ignore permanently (false positive)
+	        _this2.removeItem(d);
+	      } else if (d.newStatus === 'ignore_t') {
+	        // ignore temporarily (error fixed)
+	        _this2.removeItem(d);
 
-	      div$2
-	        .append('h4')
-	          .text(function () { return _t('QA.osmose.trap_title'); });
+	        _cache$2.closed["".concat(d.schema, ":").concat(d.id)] = true;
+	      } else {
+	        d = _this2.replaceItem(d.update({
+	          comment: d.newComment,
+	          newComment: undefined,
+	          newState: undefined
+	        }));
+	      }
 
-	      div$2
-	        .append('p')
-	          .html(function (d) { return issueString(d, 'trap'); })
-	        .selectAll('a')
-	          .attr('rel', 'noopener')
-	          .attr('target', '_blank');
-	    }
+	      if (callback) callback(null, d);
+	    });
+	  },
+	  // Get all cached QAItems covering the viewport
+	  getItems: function getItems(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    return _cache$2.rtree.search(bbox).map(function (d) {
+	      return d.data;
+	    });
+	  },
+	  // Get a QAItem from cache
+	  // NOTE: Don't change method name until UI v3 is merged
+	  getError: function getError(id) {
+	    return _cache$2.data[id];
+	  },
+	  // Replace a single QAItem in the cache
+	  replaceItem: function replaceItem(item) {
+	    if (!(item instanceof QAItem) || !item.id) return;
+	    _cache$2.data[item.id] = item;
+	    updateRtree$3(encodeIssueRtree$2(item), true); // true = replace
 
-	    // Save current item to check if UI changed by time request resolves
-	    var thisItem = _qaItem;
-	    services.osmose.loadIssueDetail(_qaItem)
-	      .then(function (d) {
-	        // No details to add if there are no associated issue elements
-	        if (!d.elems || d.elems.length === 0) { return; }
+	    return item;
+	  },
+	  // Remove a single QAItem from the cache
+	  removeItem: function removeItem(item) {
+	    if (!(item instanceof QAItem) || !item.id) return;
+	    delete _cache$2.data[item.id];
+	    updateRtree$3(encodeIssueRtree$2(item), false); // false = remove
+	  },
+	  issueURL: function issueURL(item) {
+	    return "".concat(_krUrlRoot, "/report_map.php?schema=").concat(item.schema, "&error=").concat(item.id);
+	  },
+	  // Get an array of issues closed during this session.
+	  // Used to populate `closed:keepright` changeset tag
+	  getClosedIDs: function getClosedIDs() {
+	    return Object.keys(_cache$2.closed).sort();
+	  }
+	};
 
-	        // Do nothing if UI has moved on by the time this resolves
-	        if (
-	          context.selectedErrorID() !== thisItem.id
-	          && context.container().selectAll((".qaItem.osmose.hover.itemId-" + (thisItem.id))).empty()
-	        ) { return; }
-
-	        // Things like keys and values are dynamically added to a subtitle string
-	        if (d.detail) {
-	          detailsDiv
-	            .append('h4')
-	              .text(function () { return _t('QA.osmose.detail_title'); });
-
-	          detailsDiv
-	            .append('p')
-	              .html(function (d) { return d.detail; })
-	            .selectAll('a')
-	              .attr('rel', 'noopener')
-	              .attr('target', '_blank');
-	        }
-
-	        // Create list of linked issue elements
-	        elemsDiv
-	          .append('h4')
-	            .text(function () { return _t('QA.osmose.elems_title'); });
-
-	        elemsDiv
-	          .append('ul').selectAll('li')
-	          .data(d.elems)
-	          .enter()
-	          .append('li')
-	          .append('a')
-	            .attr('class', 'error_entity_link')
-	            .text(function (d) { return d; })
-	            .each(function() {
-	              var link = select(this);
-	              var entityID = this.textContent;
-	              var entity = context.hasEntity(entityID);
-
-	              // Add click handler
-	              link
-	                .on('mouseenter', function () {
-	                  utilHighlightEntities([entityID], true, context);
-	                })
-	                .on('mouseleave', function () {
-	                  utilHighlightEntities([entityID], false, context);
-	                })
-	                .on('click', function () {
-	                  event.preventDefault();
+	var tiler$5 = utilTiler();
+	var dispatch$6 = dispatch$8('loaded');
+	var _tileZoom$2 = 14;
+	var _impOsmUrls = {
+	  ow: 'https://grab.community.improve-osm.org/directionOfFlowService',
+	  mr: 'https://grab.community.improve-osm.org/missingGeoService',
+	  tr: 'https://grab.community.improve-osm.org/turnRestrictionService'
+	};
+	var _impOsmData = {
+	  icons: {}
+	}; // This gets reassigned if reset
 
-	                  utilHighlightEntities([entityID], false, context);
+	var _cache$1;
 
-	                  var osmlayer = context.layers().layer('osm');
-	                  if (!osmlayer.enabled()) {
-	                    osmlayer.enabled(true);
-	                  }
+	function abortRequest$5(i) {
+	  Object.values(i).forEach(function (controller) {
+	    if (controller) {
+	      controller.abort();
+	    }
+	  });
+	}
 
-	                  context.map().centerZoom(d.loc, 20);
+	function abortUnwantedRequests$2(cache, tiles) {
+	  Object.keys(cache.inflightTile).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k === tile.id;
+	    });
 
-	                  if (entity) {
-	                    context.enter(modeSelect(context, [entityID]));
-	                  } else {
-	                    context.loadEntity(entityID, function () {
-	                      context.enter(modeSelect(context, [entityID]));
-	                    });
-	                  }
-	                });
+	    if (!wanted) {
+	      abortRequest$5(cache.inflightTile[k]);
+	      delete cache.inflightTile[k];
+	    }
+	  });
+	}
 
-	              // Replace with friendly name if possible
-	              // (The entity may not yet be loaded into the graph)
-	              if (entity) {
-	                var name = utilDisplayName(entity);  // try to use common name
+	function encodeIssueRtree$1(d) {
+	  return {
+	    minX: d.loc[0],
+	    minY: d.loc[1],
+	    maxX: d.loc[0],
+	    maxY: d.loc[1],
+	    data: d
+	  };
+	} // Replace or remove QAItem from rtree
 
-	                if (!name) {
-	                  var preset = _mainPresetIndex.match(entity, context.graph());
-	                  name = preset && !preset.isFallback() && preset.name();  // fallback to preset name
-	                }
 
-	                if (name) {
-	                  this.innerText = name;
-	                }
-	              }
-	            });
+	function updateRtree$2(item, replace) {
+	  _cache$1.rtree.remove(item, function (a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
-	        // Don't hide entities related to this issue - #5880
-	        context.features().forceVisible(d.elems);
-	        context.map().pan([0,0]);  // trigger a redraw
-	      })
-	      .catch(function (err) {
-	        console.log(err); // eslint-disable-line no-console
-	      });
+	  if (replace) {
+	    _cache$1.rtree.insert(item);
 	  }
+	}
 
-
-	  osmoseDetails.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return osmoseDetails;
+	function linkErrorObject(d) {
+	  return {
+	    html: "<a class=\"error_object_link\">".concat(d, "</a>")
 	  };
+	}
 
+	function linkEntity(d) {
+	  return {
+	    html: "<a class=\"error_entity_link\">".concat(d, "</a>")
+	  };
+	}
 
-	  return osmoseDetails;
+	function pointAverage(points) {
+	  if (points.length) {
+	    var sum = points.reduce(function (acc, point) {
+	      return geoVecAdd(acc, [point.lon, point.lat]);
+	    }, [0, 0]);
+	    return geoVecScale(sum, 1 / points.length);
+	  } else {
+	    return [0, 0];
+	  }
 	}
 
-	function uiOsmoseHeader() {
-	  var _qaItem;
+	function relativeBearing(p1, p2) {
+	  var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);
 
-	  function issueTitle(d) {
-	    var unknown = _t('inspector.unknown');
+	  if (angle < 0) {
+	    angle += 2 * Math.PI;
+	  } // Return degrees
 
-	    if (!d) { return unknown; }
 
-	    // Issue titles supplied by Osmose
-	    var s = services.osmose.getStrings(d.itemType);
-	    return ('title' in s) ? s.title : unknown;
-	  }
+	  return angle * 180 / Math.PI;
+	} // Assuming range [0,360)
 
-	  function osmoseHeader(selection) {
-	    var header = selection.selectAll('.qa-header')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
 
-	    header.exit()
-	      .remove();
-
-	    var headerEnter = header.enter()
-	      .append('div')
-	        .attr('class', 'qa-header');
-
-	    var svgEnter = headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-icon')
-	        .classed('new', function (d) { return d.id < 0; })
-	      .append('svg')
-	        .attr('width', '20px')
-	        .attr('height', '30px')
-	        .attr('viewbox', '0 0 20 30')
-	        .attr('class', function (d) { return ("preset-icon-28 qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-	    svgEnter
-	      .append('polygon')
-	        .attr('fill', function (d) { return services.osmose.getColor(d.item); })
-	        .attr('class', 'qaItem-fill')
-	        .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-
-	    svgEnter
-	      .append('use')
-	        .attr('class', 'icon-annotation')
-	        .attr('width', '13px')
-	        .attr('height', '13px')
-	        .attr('transform', 'translate(3.5, 5)')
-	        .attr('xlink:href', function (d) {
-	          var picon = d.icon;
-
-	          if (!picon) {
-	            return '';
-	          } else {
-	            var isMaki = /^maki-/.test(picon);
-	            return ("#" + picon + (isMaki ? '-11' : ''));
-	          }
-	        });
+	function cardinalDirection(bearing) {
+	  var dir = 45 * Math.round(bearing / 45);
+	  var compass = {
+	    0: 'north',
+	    45: 'northeast',
+	    90: 'east',
+	    135: 'southeast',
+	    180: 'south',
+	    225: 'southwest',
+	    270: 'west',
+	    315: 'northwest',
+	    360: 'north'
+	  };
+	  return _t("QA.improveOSM.directions.".concat(compass[dir]));
+	} // Errors shouldn't obscure each other
 
-	    headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-label')
-	        .text(issueTitle);
-	  }
 
-	  osmoseHeader.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return osmoseHeader;
-	  };
+	function preventCoincident$1(loc, bumpUp) {
+	  var coincident = false;
 
-	  return osmoseHeader;
+	  do {
+	    // first time, move marker up. after that, move marker right.
+	    var delta = coincident ? [0.00001, 0] : bumpUp ? [0, 0.00001] : [0, 0];
+	    loc = geoVecAdd(loc, delta);
+	    var bbox = geoExtent(loc).bbox();
+	    coincident = _cache$1.rtree.search(bbox).length;
+	  } while (coincident);
+
+	  return loc;
 	}
 
-	function uiViewOnOsmose() {
-	  var _qaItem;
+	var serviceImproveOSM = {
+	  title: 'improveOSM',
+	  init: function init() {
+	    _mainFileFetcher.get('qa_data').then(function (d) {
+	      return _impOsmData = d.improveOSM;
+	    });
 
-	  function viewOnOsmose(selection) {
-	    var url;
-	    if (services.osmose && (_qaItem instanceof QAItem)) {
-	      url = services.osmose.itemURL(_qaItem);
+	    if (!_cache$1) {
+	      this.reset();
+	    }
+
+	    this.event = utilRebind(this, dispatch$6, 'on');
+	  },
+	  reset: function reset() {
+	    if (_cache$1) {
+	      Object.values(_cache$1.inflightTile).forEach(abortRequest$5);
 	    }
 
-	    var link = selection.selectAll('.view-on-osmose')
-	      .data(url ? [url] : []);
+	    _cache$1 = {
+	      data: {},
+	      loadedTile: {},
+	      inflightTile: {},
+	      inflightPost: {},
+	      closed: {},
+	      rtree: new RBush()
+	    };
+	  },
+	  loadIssues: function loadIssues(projection) {
+	    var _this = this;
+
+	    var options = {
+	      client: 'iD',
+	      status: 'OPEN',
+	      zoom: '19' // Use a high zoom so that clusters aren't returned
 
-	    // exit
-	    link.exit()
-	      .remove();
+	    }; // determine the needed tiles to cover the view
 
-	    // enter
-	    var linkEnter = link.enter()
-	      .append('a')
-	        .attr('class', 'view-on-osmose')
-	        .attr('target', '_blank')
-	        .attr('rel', 'noopener') // security measure
-	        .attr('href', function (d) { return d; })
-	        .call(svgIcon('#iD-icon-out-link', 'inline'));
+	    var tiles = tiler$5.zoomExtent([_tileZoom$2, _tileZoom$2]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	    linkEnter
-	      .append('span')
-	        .text(_t('inspector.view_on_osmose'));
-	  }
+	    abortUnwantedRequests$2(_cache$1, tiles); // issue new requests..
 
-	  viewOnOsmose.what = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return viewOnOsmose;
-	  };
+	    tiles.forEach(function (tile) {
+	      if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) return;
+
+	      var _tile$extent$rectangl = tile.extent.rectangle(),
+	          _tile$extent$rectangl2 = _slicedToArray(_tile$extent$rectangl, 4),
+	          east = _tile$extent$rectangl2[0],
+	          north = _tile$extent$rectangl2[1],
+	          west = _tile$extent$rectangl2[2],
+	          south = _tile$extent$rectangl2[3];
+
+	      var params = Object.assign({}, options, {
+	        east: east,
+	        south: south,
+	        west: west,
+	        north: north
+	      }); // 3 separate requests to store for each tile
 
-	  return viewOnOsmose;
-	}
+	      var requests = {};
+	      Object.keys(_impOsmUrls).forEach(function (k) {
+	        // We exclude WATER from missing geometry as it doesn't seem useful
+	        // We use most confident one-way and turn restrictions only, still have false positives
+	        var kParams = Object.assign({}, params, k === 'mr' ? {
+	          type: 'PARKING,ROAD,BOTH,PATH'
+	        } : {
+	          confidenceLevel: 'C1'
+	        });
+	        var url = "".concat(_impOsmUrls[k], "/search?") + utilQsString(kParams);
+	        var controller = new AbortController();
+	        requests[k] = controller;
+	        d3_json(url, {
+	          signal: controller.signal
+	        }).then(function (data) {
+	          delete _cache$1.inflightTile[tile.id][k];
+
+	          if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
+	            delete _cache$1.inflightTile[tile.id];
+	            _cache$1.loadedTile[tile.id] = true;
+	          } // Road segments at high zoom == oneways
+
+
+	          if (data.roadSegments) {
+	            data.roadSegments.forEach(function (feature) {
+	              // Position error at the approximate middle of the segment
+	              var points = feature.points,
+	                  wayId = feature.wayId,
+	                  fromNodeId = feature.fromNodeId,
+	                  toNodeId = feature.toNodeId;
+	              var itemId = "".concat(wayId).concat(fromNodeId).concat(toNodeId);
+	              var mid = points.length / 2;
+	              var loc; // Even number of points, find midpoint of the middle two
+	              // Odd number of points, use position of very middle point
+
+	              if (mid % 1 === 0) {
+	                loc = pointAverage([points[mid - 1], points[mid]]);
+	              } else {
+	                mid = points[Math.floor(mid)];
+	                loc = [mid.lon, mid.lat];
+	              } // One-ways can land on same segment in opposite direction
+
+
+	              loc = preventCoincident$1(loc, false);
+	              var d = new QAItem(loc, _this, k, itemId, {
+	                issueKey: k,
+	                // used as a category
+	                identifier: {
+	                  // used to post changes
+	                  wayId: wayId,
+	                  fromNodeId: fromNodeId,
+	                  toNodeId: toNodeId
+	                },
+	                objectId: wayId,
+	                objectType: 'way'
+	              }); // Variables used in the description
+
+	              d.replacements = {
+	                percentage: feature.percentOfTrips,
+	                num_trips: feature.numberOfTrips,
+	                highway: linkErrorObject(_t('QA.keepRight.error_parts.highway')),
+	                from_node: linkEntity('n' + feature.fromNodeId),
+	                to_node: linkEntity('n' + feature.toNodeId)
+	              };
+	              _cache$1.data[d.id] = d;
+
+	              _cache$1.rtree.insert(encodeIssueRtree$1(d));
+	            });
+	          } // Tiles at high zoom == missing roads
+
+
+	          if (data.tiles) {
+	            data.tiles.forEach(function (feature) {
+	              var type = feature.type,
+	                  x = feature.x,
+	                  y = feature.y,
+	                  numberOfTrips = feature.numberOfTrips;
+	              var geoType = type.toLowerCase();
+	              var itemId = "".concat(geoType).concat(x).concat(y).concat(numberOfTrips); // Average of recorded points should land on the missing geometry
+	              // Missing geometry could happen to land on another error
+
+	              var loc = pointAverage(feature.points);
+	              loc = preventCoincident$1(loc, false);
+	              var d = new QAItem(loc, _this, "".concat(k, "-").concat(geoType), itemId, {
+	                issueKey: k,
+	                identifier: {
+	                  x: x,
+	                  y: y
+	                }
+	              });
+	              d.replacements = {
+	                num_trips: numberOfTrips,
+	                geometry_type: _t("QA.improveOSM.geometry_types.".concat(geoType))
+	              }; // -1 trips indicates data came from a 3rd party
 
-	function uiOsmoseEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var qaDetails = uiOsmoseDetails(context);
-	  var qaHeader = uiOsmoseHeader();
+	              if (numberOfTrips === -1) {
+	                d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
+	              }
 
-	  var _qaItem;
+	              _cache$1.data[d.id] = d;
 
-	  function osmoseEditor(selection) {
+	              _cache$1.rtree.insert(encodeIssueRtree$1(d));
+	            });
+	          } // Entities at high zoom == turn restrictions
+
+
+	          if (data.entities) {
+	            data.entities.forEach(function (feature) {
+	              var point = feature.point,
+	                  id = feature.id,
+	                  segments = feature.segments,
+	                  numberOfPasses = feature.numberOfPasses,
+	                  turnType = feature.turnType;
+	              var itemId = "".concat(id.replace(/[,:+#]/g, '_')); // Turn restrictions could be missing at same junction
+	              // We also want to bump the error up so node is accessible
+
+	              var loc = preventCoincident$1([point.lon, point.lat], true); // Elements are presented in a strange way
+
+	              var ids = id.split(',');
+	              var from_way = ids[0];
+	              var via_node = ids[3];
+	              var to_way = ids[2].split(':')[1];
+	              var d = new QAItem(loc, _this, k, itemId, {
+	                issueKey: k,
+	                identifier: id,
+	                objectId: via_node,
+	                objectType: 'node'
+	              }); // Travel direction along from_way clarifies the turn restriction
+
+	              var _segments$0$points = _slicedToArray(segments[0].points, 2),
+	                  p1 = _segments$0$points[0],
+	                  p2 = _segments$0$points[1];
+
+	              var dir_of_travel = cardinalDirection(relativeBearing(p1, p2)); // Variables used in the description
+
+	              d.replacements = {
+	                num_passed: numberOfPasses,
+	                num_trips: segments[0].numberOfTrips,
+	                turn_restriction: turnType.toLowerCase(),
+	                from_way: linkEntity('w' + from_way),
+	                to_way: linkEntity('w' + to_way),
+	                travel_direction: dir_of_travel,
+	                junction: linkErrorObject(_t('QA.keepRight.error_parts.this_node'))
+	              };
+	              _cache$1.data[d.id] = d;
+
+	              _cache$1.rtree.insert(encodeIssueRtree$1(d));
+
+	              dispatch$6.call('loaded');
+	            });
+	          }
+	        })["catch"](function () {
+	          delete _cache$1.inflightTile[tile.id][k];
 
-	    var header = selection.selectAll('.header')
-	      .data([0]);
+	          if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
+	            delete _cache$1.inflightTile[tile.id];
+	            _cache$1.loadedTile[tile.id] = true;
+	          }
+	        });
+	      });
+	      _cache$1.inflightTile[tile.id] = requests;
+	    });
+	  },
+	  getComments: function getComments(item) {
+	    var _this2 = this;
 
-	    var headerEnter = header.enter()
-	      .append('div')
-	        .attr('class', 'header fillL');
+	    // If comments already retrieved no need to do so again
+	    if (item.comments) {
+	      return Promise.resolve(item);
+	    }
 
-	    headerEnter
-	      .append('button')
-	        .attr('class', 'close')
-	        .on('click', function () { return context.enter(modeBrowse(context)); })
-	        .call(svgIcon('#iD-icon-close'));
+	    var key = item.issueKey;
+	    var qParams = {};
 
-	    headerEnter
-	      .append('h3')
-	        .text(_t('QA.osmose.title'));
+	    if (key === 'ow') {
+	      qParams = item.identifier;
+	    } else if (key === 'mr') {
+	      qParams.tileX = item.identifier.x;
+	      qParams.tileY = item.identifier.y;
+	    } else if (key === 'tr') {
+	      qParams.targetId = item.identifier;
+	    }
 
-	    var body = selection.selectAll('.body')
-	      .data([0]);
+	    var url = "".concat(_impOsmUrls[key], "/retrieveComments?") + utilQsString(qParams);
 
-	    body = body.enter()
-	        .append('div')
-	        .attr('class', 'body')
-	      .merge(body);
+	    var cacheComments = function cacheComments(data) {
+	      // Assign directly for immediate use afterwards
+	      // comments are served newest to oldest
+	      item.comments = data.comments ? data.comments.reverse() : [];
 
-	    var editor = body.selectAll('.qa-editor')
-	      .data([0]);
+	      _this2.replaceItem(item);
+	    };
 
-	    editor.enter()
-	      .append('div')
-	        .attr('class', 'modal-section qa-editor')
-	      .merge(editor)
-	        .call(qaHeader.issue(_qaItem))
-	        .call(qaDetails.issue(_qaItem))
-	        .call(osmoseSaveSection);
+	    return d3_json(url).then(cacheComments).then(function () {
+	      return item;
+	    });
+	  },
+	  postUpdate: function postUpdate(d, callback) {
+	    if (!serviceOsm.authenticated()) {
+	      // Username required in payload
+	      return callback({
+	        message: 'Not Authenticated',
+	        status: -3
+	      }, d);
+	    }
 
-	    var footer = selection.selectAll('.footer')
-	      .data([0]);
+	    if (_cache$1.inflightPost[d.id]) {
+	      return callback({
+	        message: 'Error update already inflight',
+	        status: -2
+	      }, d);
+	    } // Payload can only be sent once username is established
 
-	    footer.enter()
-	      .append('div')
-	      .attr('class', 'footer')
-	      .merge(footer)
-	      .call(uiViewOnOsmose().what(_qaItem));
-	  }
 
-	  function osmoseSaveSection(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var isShown = (_qaItem && isSelected);
-	    var saveSection = selection.selectAll('.qa-save')
-	      .data(
-	        (isShown ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	    serviceOsm.userDetails(sendPayload.bind(this));
 
-	    // exit
-	    saveSection.exit()
-	      .remove();
+	    function sendPayload(err, user) {
+	      var _this3 = this;
 
-	    // enter
-	    var saveSectionEnter = saveSection.enter()
-	      .append('div')
-	        .attr('class', 'qa-save save-section cf');
+	      if (err) {
+	        return callback(err, d);
+	      }
 
-	    // update
-	    saveSection = saveSectionEnter
-	      .merge(saveSection)
-	        .call(qaSaveButtons);
-	  }
+	      var key = d.issueKey;
+	      var url = "".concat(_impOsmUrls[key], "/comment");
+	      var payload = {
+	        username: user.display_name,
+	        targetIds: [d.identifier]
+	      };
 
-	  function qaSaveButtons(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var buttonSection = selection.selectAll('.buttons')
-	      .data((isSelected ? [_qaItem] : []), function (d) { return d.status + d.id; });
+	      if (d.newStatus) {
+	        payload.status = d.newStatus;
+	        payload.text = 'status changed';
+	      } // Comment take place of default text
 
-	    // exit
-	    buttonSection.exit()
-	      .remove();
 
-	    // enter
-	    var buttonEnter = buttonSection.enter()
-	      .append('div')
-	        .attr('class', 'buttons');
+	      if (d.newComment) {
+	        payload.text = d.newComment;
+	      }
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button close-button action');
+	      var controller = new AbortController();
+	      _cache$1.inflightPost[d.id] = controller;
+	      var options = {
+	        method: 'POST',
+	        signal: controller.signal,
+	        body: JSON.stringify(payload)
+	      };
+	      d3_json(url, options).then(function () {
+	        delete _cache$1.inflightPost[d.id]; // Just a comment, update error in cache
+
+	        if (!d.newStatus) {
+	          var now = new Date();
+	          var comments = d.comments ? d.comments : [];
+	          comments.push({
+	            username: payload.username,
+	            text: payload.text,
+	            timestamp: now.getTime() / 1000
+	          });
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button ignore-button action');
+	          _this3.replaceItem(d.update({
+	            comments: comments,
+	            newComment: undefined
+	          }));
+	        } else {
+	          _this3.removeItem(d);
 
-	    // update
-	    buttonSection = buttonSection
-	      .merge(buttonEnter);
+	          if (d.newStatus === 'SOLVED') {
+	            // Keep track of the number of issues closed per type to tag the changeset
+	            if (!(d.issueKey in _cache$1.closed)) {
+	              _cache$1.closed[d.issueKey] = 0;
+	            }
 
-	    buttonSection.select('.close-button')
-	      .text(function () { return _t('QA.keepRight.close'); })
-	      .on('click.close', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.osmose;
-	        if (qaService) {
-	          d.newStatus = 'done';
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
+	            _cache$1.closed[d.issueKey] += 1;
+	          }
 	        }
-	      });
 
-	    buttonSection.select('.ignore-button')
-	      .text(function () { return _t('QA.keepRight.ignore'); })
-	      .on('click.ignore', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.osmose;
-	        if (qaService) {
-	          d.newStatus = 'false';
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
+	        if (callback) callback(null, d);
+	      })["catch"](function (err) {
+	        delete _cache$1.inflightPost[d.id];
+	        if (callback) callback(err.message);
 	      });
+	    }
+	  },
+	  // Get all cached QAItems covering the viewport
+	  getItems: function getItems(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    return _cache$1.rtree.search(bbox).map(function (d) {
+	      return d.data;
+	    });
+	  },
+	  // Get a QAItem from cache
+	  // NOTE: Don't change method name until UI v3 is merged
+	  getError: function getError(id) {
+	    return _cache$1.data[id];
+	  },
+	  // get the name of the icon to display for this item
+	  getIcon: function getIcon(itemType) {
+	    return _impOsmData.icons[itemType];
+	  },
+	  // Replace a single QAItem in the cache
+	  replaceItem: function replaceItem(issue) {
+	    if (!(issue instanceof QAItem) || !issue.id) return;
+	    _cache$1.data[issue.id] = issue;
+	    updateRtree$2(encodeIssueRtree$1(issue), true); // true = replace
+
+	    return issue;
+	  },
+	  // Remove a single QAItem from the cache
+	  removeItem: function removeItem(issue) {
+	    if (!(issue instanceof QAItem) || !issue.id) return;
+	    delete _cache$1.data[issue.id];
+	    updateRtree$2(encodeIssueRtree$1(issue), false); // false = remove
+	  },
+	  // Used to populate `closed:improveosm:*` changeset tags
+	  getClosedCounts: function getClosedCounts() {
+	    return _cache$1.closed;
 	  }
+	};
 
-	  // NOTE: Don't change method name until UI v3 is merged
-	  osmoseEditor.error = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return osmoseEditor;
+	var defaults$5 = {exports: {}};
+
+	function getDefaults$1() {
+	  return {
+	    baseUrl: null,
+	    breaks: false,
+	    gfm: true,
+	    headerIds: true,
+	    headerPrefix: '',
+	    highlight: null,
+	    langPrefix: 'language-',
+	    mangle: true,
+	    pedantic: false,
+	    renderer: null,
+	    sanitize: false,
+	    sanitizer: null,
+	    silent: false,
+	    smartLists: false,
+	    smartypants: false,
+	    tokenizer: null,
+	    walkTokens: null,
+	    xhtml: false
 	  };
+	}
 
-	  return utilRebind(osmoseEditor, dispatch$1, 'on');
+	function changeDefaults$1(newDefaults) {
+	  defaults$5.exports.defaults = newDefaults;
 	}
 
-	// NOTE: Don't change name of this until UI v3 is merged
-	function modeSelectError(context, selectedErrorID, selectedErrorService) {
-	    var mode = {
-	        id: 'select-error',
-	        button: 'browse'
-	    };
+	defaults$5.exports = {
+	  defaults: getDefaults$1(),
+	  getDefaults: getDefaults$1,
+	  changeDefaults: changeDefaults$1
+	};
 
-	    var keybinding = utilKeybinding('select-error');
-
-	    var errorService = services[selectedErrorService];
-	    var errorEditor;
-	    switch (selectedErrorService) {
-	        case 'improveOSM':
-	            errorEditor = uiImproveOsmEditor(context)
-	            .on('change', function() {
-	                context.map().pan([0,0]);  // trigger a redraw
-	                var error = checkSelectedID();
-	                if (!error) { return; }
-	                context.ui().sidebar
-	                    .show(errorEditor.error(error));
-	            });
-	            break;
-	        case 'keepRight':
-	            errorEditor = uiKeepRightEditor(context)
-	            .on('change', function() {
-	                context.map().pan([0,0]);  // trigger a redraw
-	                var error = checkSelectedID();
-	                if (!error) { return; }
-	                context.ui().sidebar
-	                    .show(errorEditor.error(error));
-	            });
-	            break;
-	        case 'osmose':
-	            errorEditor = uiOsmoseEditor(context)
-	            .on('change', function() {
-	                context.map().pan([0,0]);  // trigger a redraw
-	                var error = checkSelectedID();
-	                if (!error) { return; }
-	                context.ui().sidebar
-	                    .show(errorEditor.error(error));
-	            });
-	            break;
+	var escapeTest = /[&<>"']/;
+	var escapeReplace = /[&<>"']/g;
+	var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
+	var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
+	var escapeReplacements = {
+	  '&': '&amp;',
+	  '<': '&lt;',
+	  '>': '&gt;',
+	  '"': '&quot;',
+	  "'": '&#39;'
+	};
+
+	var getEscapeReplacement = function getEscapeReplacement(ch) {
+	  return escapeReplacements[ch];
+	};
+
+	function escape$3(html, encode) {
+	  if (encode) {
+	    if (escapeTest.test(html)) {
+	      return html.replace(escapeReplace, getEscapeReplacement);
+	    }
+	  } else {
+	    if (escapeTestNoEncode.test(html)) {
+	      return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
 	    }
+	  }
 
+	  return html;
+	}
 
-	    var behaviors = [
-	        behaviorBreathe(),
-	        behaviorHover(context),
-	        behaviorSelect(context),
-	        behaviorLasso(context),
-	        modeDragNode(context).behavior,
-	        modeDragNote(context).behavior
-	    ];
+	var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
 
+	function unescape$2(html) {
+	  // explicitly match decimal, hex, and named HTML entities
+	  return html.replace(unescapeTest, function (_, n) {
+	    n = n.toLowerCase();
+	    if (n === 'colon') return ':';
 
-	    function checkSelectedID() {
-	        if (!errorService) { return; }
-	        var error = errorService.getError(selectedErrorID);
-	        if (!error) {
-	            context.enter(modeBrowse(context));
-	        }
-	        return error;
+	    if (n.charAt(0) === '#') {
+	      return n.charAt(1) === 'x' ? String.fromCharCode(parseInt(n.substring(2), 16)) : String.fromCharCode(+n.substring(1));
 	    }
 
+	    return '';
+	  });
+	}
 
-	    mode.zoomToSelected = function() {
-	        if (!errorService) { return; }
-	        var error = errorService.getError(selectedErrorID);
-	        if (error) {
-	            context.map().centerZoomEase(error.loc, 20);
-	        }
-	    };
+	var caret = /(^|[^\[])\^/g;
 
+	function edit$1(regex, opt) {
+	  regex = regex.source || regex;
+	  opt = opt || '';
+	  var obj = {
+	    replace: function replace(name, val) {
+	      val = val.source || val;
+	      val = val.replace(caret, '$1');
+	      regex = regex.replace(name, val);
+	      return obj;
+	    },
+	    getRegex: function getRegex() {
+	      return new RegExp(regex, opt);
+	    }
+	  };
+	  return obj;
+	}
 
-	    mode.enter = function() {
-	        var error = checkSelectedID();
-	        if (!error) { return; }
+	var nonWordAndColonTest = /[^\w:]/g;
+	var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
 
-	        behaviors.forEach(context.install);
-	        keybinding
-	            .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-	            .on('⎋', esc, true);
+	function cleanUrl$1(sanitize, base, href) {
+	  if (sanitize) {
+	    var prot;
 
-	        select(document)
-	            .call(keybinding);
+	    try {
+	      prot = decodeURIComponent(unescape$2(href)).replace(nonWordAndColonTest, '').toLowerCase();
+	    } catch (e) {
+	      return null;
+	    }
 
-	        selectError();
+	    if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
+	      return null;
+	    }
+	  }
 
-	        var sidebar = context.ui().sidebar;
-	        sidebar.show(errorEditor.error(error));
+	  if (base && !originIndependentUrl.test(href)) {
+	    href = resolveUrl$2(base, href);
+	  }
 
-	        context.map()
-	            .on('drawn.select-error', selectError);
+	  try {
+	    href = encodeURI(href).replace(/%25/g, '%');
+	  } catch (e) {
+	    return null;
+	  }
 
+	  return href;
+	}
 
-	        // class the error as selected, or return to browse mode if the error is gone
-	        function selectError(drawn) {
-	            if (!checkSelectedID()) { return; }
+	var baseUrls = {};
+	var justDomain = /^[^:]+:\/*[^/]*$/;
+	var protocol = /^([^:]+:)[\s\S]*$/;
+	var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
 
-	            var selection = context.surface()
-	                .selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
+	function resolveUrl$2(base, href) {
+	  if (!baseUrls[' ' + base]) {
+	    // we can ignore everything in base after the last slash of its path component,
+	    // but we might need to add _that_
+	    // https://tools.ietf.org/html/rfc3986#section-3
+	    if (justDomain.test(base)) {
+	      baseUrls[' ' + base] = base + '/';
+	    } else {
+	      baseUrls[' ' + base] = rtrim$1(base, '/', true);
+	    }
+	  }
 
-	            if (selection.empty()) {
-	                // Return to browse mode if selected DOM elements have
-	                // disappeared because the user moved them out of view..
-	                var source = event && event.type === 'zoom' && event.sourceEvent;
-	                if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-	                    context.enter(modeBrowse(context));
-	                }
+	  base = baseUrls[' ' + base];
+	  var relativeBase = base.indexOf(':') === -1;
 
-	            } else {
-	                selection
-	                    .classed('selected', true);
+	  if (href.substring(0, 2) === '//') {
+	    if (relativeBase) {
+	      return href;
+	    }
 
-	                context.selectedErrorID(selectedErrorID);
-	            }
-	        }
+	    return base.replace(protocol, '$1') + href;
+	  } else if (href.charAt(0) === '/') {
+	    if (relativeBase) {
+	      return href;
+	    }
 
-	        function esc() {
-	            if (context.container().select('.combobox').size()) { return; }
-	            context.enter(modeBrowse(context));
-	        }
-	    };
+	    return base.replace(domain, '$1') + href;
+	  } else {
+	    return base + href;
+	  }
+	}
 
+	var noopTest$1 = {
+	  exec: function noopTest() {}
+	};
 
-	    mode.exit = function() {
-	        behaviors.forEach(context.uninstall);
+	function merge$2(obj) {
+	  var i = 1,
+	      target,
+	      key;
 
-	        select(document)
-	            .call(keybinding.unbind);
+	  for (; i < arguments.length; i++) {
+	    target = arguments[i];
 
-	        context.surface()
-	            .selectAll('.qaItem.selected')
-	            .classed('selected hover', false);
+	    for (key in target) {
+	      if (Object.prototype.hasOwnProperty.call(target, key)) {
+	        obj[key] = target[key];
+	      }
+	    }
+	  }
 
-	        context.map()
-	            .on('drawn.select-error', null);
+	  return obj;
+	}
 
-	        context.ui().sidebar
-	            .hide();
+	function splitCells$1(tableRow, count) {
+	  // ensure that every cell-delimiting pipe has a space
+	  // before it to distinguish it from an escaped pipe
+	  var row = tableRow.replace(/\|/g, function (match, offset, str) {
+	    var escaped = false,
+	        curr = offset;
 
-	        context.selectedErrorID(null);
-	        context.features().forceVisible([]);
-	    };
+	    while (--curr >= 0 && str[curr] === '\\') {
+	      escaped = !escaped;
+	    }
 
+	    if (escaped) {
+	      // odd number of slashes means | is escaped
+	      // so we leave it alone
+	      return '|';
+	    } else {
+	      // add space before unescaped |
+	      return ' |';
+	    }
+	  }),
+	      cells = row.split(/ \|/);
+	  var i = 0;
 
-	    return mode;
-	}
+	  if (cells.length > count) {
+	    cells.splice(count);
+	  } else {
+	    while (cells.length < count) {
+	      cells.push('');
+	    }
+	  }
 
-	function behaviorSelect(context) {
-	    var _tolerancePx = 4; // see also behaviorDrag
-	    var _lastMouseEvent = null;
-	    var _showMenu = false;
-	    var _downPointers = {};
-	    var _longPressTimeout = null;
-	    var _lastInteractionType = null;
-	    // the id of the down pointer that's enabling multiselection while down
-	    var _multiselectionPointerId = null;
+	  for (; i < cells.length; i++) {
+	    // leading or trailing whitespace is ignored per the gfm spec
+	    cells[i] = cells[i].trim().replace(/\\\|/g, '|');
+	  }
 
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	  return cells;
+	} // Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
+	// /c*$/ is vulnerable to REDOS.
+	// invert: Remove suffix of non-c chars instead. Default falsey.
 
 
-	    function keydown() {
+	function rtrim$1(str, c, invert) {
+	  var l = str.length;
 
-	        if (event.keyCode === 32) {
-	            // don't react to spacebar events during text input
-	            var activeNode = document.activeElement;
-	            if (activeNode && new Set(['INPUT', 'TEXTAREA']).has(activeNode.nodeName)) { return; }
-	        }
+	  if (l === 0) {
+	    return '';
+	  } // Length of suffix matching the invert condition.
 
-	        if (event.keyCode === 93 ||  // context menu key
-	            event.keyCode === 32) {  // spacebar
-	            event.preventDefault();
-	        }
 
-	        if (event.repeat) { return; } // ignore repeated events for held keys
+	  var suffLen = 0; // Step left until we fail to match the invert condition.
 
-	        // if any key is pressed the user is probably doing something other than long-pressing
-	        cancelLongPress();
+	  while (suffLen < l) {
+	    var currChar = str.charAt(l - suffLen - 1);
 
-	        if (event.shiftKey) {
-	            context.surface()
-	                .classed('behavior-multiselect', true);
-	        }
+	    if (currChar === c && !invert) {
+	      suffLen++;
+	    } else if (currChar !== c && invert) {
+	      suffLen++;
+	    } else {
+	      break;
+	    }
+	  }
 
-	        if (event.keyCode === 32) {  // spacebar
-	            if (!_downPointers.spacebar && _lastMouseEvent) {
-	                cancelLongPress();
-	                _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
+	  return str.substr(0, l - suffLen);
+	}
 
-	                _downPointers.spacebar = {
-	                    firstEvent: _lastMouseEvent,
-	                    lastEvent: _lastMouseEvent
-	                };
-	            }
-	        }
-	    }
+	function findClosingBracket$1(str, b) {
+	  if (str.indexOf(b[1]) === -1) {
+	    return -1;
+	  }
 
+	  var l = str.length;
+	  var level = 0,
+	      i = 0;
 
-	    function keyup() {
-	        cancelLongPress();
+	  for (; i < l; i++) {
+	    if (str[i] === '\\') {
+	      i++;
+	    } else if (str[i] === b[0]) {
+	      level++;
+	    } else if (str[i] === b[1]) {
+	      level--;
 
-	        if (!event.shiftKey) {
-	            context.surface()
-	                .classed('behavior-multiselect', false);
-	        }
+	      if (level < 0) {
+	        return i;
+	      }
+	    }
+	  }
 
-	        if (event.keyCode === 93) {  // context menu key
-	            event.preventDefault();
-	            _lastInteractionType = 'menukey';
-	            contextmenu();
-	        } else if (event.keyCode === 32) {  // spacebar
-	            var pointer = _downPointers.spacebar;
-	            if (pointer) {
-	                delete _downPointers.spacebar;
+	  return -1;
+	}
 
-	                if (pointer.done) { return; }
+	function checkSanitizeDeprecation$1(opt) {
+	  if (opt && opt.sanitize && !opt.silent) {
+	    console.warn('marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. Read more here: https://marked.js.org/#/USING_ADVANCED.md#options');
+	  }
+	} // copied from https://stackoverflow.com/a/5450113/806777
 
-	                event.preventDefault();
-	                _lastInteractionType = 'spacebar';
-	                click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
-	            }
-	        }
-	    }
 
+	function repeatString$1(pattern, count) {
+	  if (count < 1) {
+	    return '';
+	  }
 
-	    function pointerdown() {
-	        var id = (event.pointerId || 'mouse').toString();
+	  var result = '';
 
-	        cancelLongPress();
+	  while (count > 1) {
+	    if (count & 1) {
+	      result += pattern;
+	    }
 
-	        if (event.buttons && event.buttons !== 1) { return; }
+	    count >>= 1;
+	    pattern += pattern;
+	  }
 
-	        context.ui().closeEditMenu();
+	  return result + pattern;
+	}
 
-	        _longPressTimeout = window.setTimeout(didLongPress, 500, id, 'longdown-' + (event.pointerType || 'mouse'));
+	var helpers = {
+	  escape: escape$3,
+	  unescape: unescape$2,
+	  edit: edit$1,
+	  cleanUrl: cleanUrl$1,
+	  resolveUrl: resolveUrl$2,
+	  noopTest: noopTest$1,
+	  merge: merge$2,
+	  splitCells: splitCells$1,
+	  rtrim: rtrim$1,
+	  findClosingBracket: findClosingBracket$1,
+	  checkSanitizeDeprecation: checkSanitizeDeprecation$1,
+	  repeatString: repeatString$1
+	};
+
+	var defaults$4 = defaults$5.exports.defaults;
+	var rtrim = helpers.rtrim,
+	    splitCells = helpers.splitCells,
+	    _escape = helpers.escape,
+	    findClosingBracket = helpers.findClosingBracket;
 
-	        _downPointers[id] = {
-	            firstEvent: event,
-	            lastEvent: event
-	        };
-	    }
+	function outputLink(cap, link, raw) {
+	  var href = link.href;
+	  var title = link.title ? _escape(link.title) : null;
+	  var text = cap[1].replace(/\\([\[\]])/g, '$1');
 
+	  if (cap[0].charAt(0) !== '!') {
+	    return {
+	      type: 'link',
+	      raw: raw,
+	      href: href,
+	      title: title,
+	      text: text
+	    };
+	  } else {
+	    return {
+	      type: 'image',
+	      raw: raw,
+	      href: href,
+	      title: title,
+	      text: _escape(text)
+	    };
+	  }
+	}
 
-	    function didLongPress(id, interactionType) {
-	        var pointer = _downPointers[id];
-	        if (!pointer) { return; }
+	function indentCodeCompensation(raw, text) {
+	  var matchIndentToCode = raw.match(/^(\s+)(?:```)/);
 
-	        for (var i in _downPointers) {
-	            // don't allow this or any currently down pointer to trigger another click
-	            _downPointers[i].done = true;
-	        }
+	  if (matchIndentToCode === null) {
+	    return text;
+	  }
 
-	        // treat long presses like right-clicks
-	        _longPressTimeout = null;
-	        _lastInteractionType = interactionType;
-	        _showMenu = true;
+	  var indentToCode = matchIndentToCode[1];
+	  return text.split('\n').map(function (node) {
+	    var matchIndentInNode = node.match(/^\s+/);
 
-	        click(pointer.firstEvent, pointer.lastEvent, id);
+	    if (matchIndentInNode === null) {
+	      return node;
 	    }
 
+	    var _matchIndentInNode = _slicedToArray(matchIndentInNode, 1),
+	        indentInNode = _matchIndentInNode[0];
 
-	    function pointermove() {
-	        var id = (event.pointerId || 'mouse').toString();
-	        if (_downPointers[id]) {
-	            _downPointers[id].lastEvent = event;
-	        }
-	        if (!event.pointerType || event.pointerType === 'mouse') {
-	            _lastMouseEvent = event;
-	            if (_downPointers.spacebar) {
-	                _downPointers.spacebar.lastEvent = event;
-	            }
-	        }
+	    if (indentInNode.length >= indentToCode.length) {
+	      return node.slice(indentToCode.length);
 	    }
 
+	    return node;
+	  }).join('\n');
+	}
+	/**
+	 * Tokenizer
+	 */
+
 
-	    function pointerup() {
-	        var id = (event.pointerId || 'mouse').toString();
-	        var pointer = _downPointers[id];
-	        if (!pointer) { return; }
+	var Tokenizer_1 = /*#__PURE__*/function () {
+	  function Tokenizer(options) {
+	    _classCallCheck$1(this, Tokenizer);
+
+	    this.options = options || defaults$4;
+	  }
 
-	        delete _downPointers[id];
+	  _createClass$1(Tokenizer, [{
+	    key: "space",
+	    value: function space(src) {
+	      var cap = this.rules.block.newline.exec(src);
 
-	        if (_multiselectionPointerId === id) {
-	            _multiselectionPointerId = null;
+	      if (cap) {
+	        if (cap[0].length > 1) {
+	          return {
+	            type: 'space',
+	            raw: cap[0]
+	          };
 	        }
 
-	        if (pointer.done) { return; }
+	        return {
+	          raw: '\n'
+	        };
+	      }
+	    }
+	  }, {
+	    key: "code",
+	    value: function code(src) {
+	      var cap = this.rules.block.code.exec(src);
 
-	        click(pointer.firstEvent, event, id);
+	      if (cap) {
+	        var text = cap[0].replace(/^ {1,4}/gm, '');
+	        return {
+	          type: 'code',
+	          raw: cap[0],
+	          codeBlockStyle: 'indented',
+	          text: !this.options.pedantic ? rtrim(text, '\n') : text
+	        };
+	      }
 	    }
+	  }, {
+	    key: "fences",
+	    value: function fences(src) {
+	      var cap = this.rules.block.fences.exec(src);
 
+	      if (cap) {
+	        var raw = cap[0];
+	        var text = indentCodeCompensation(raw, cap[3] || '');
+	        return {
+	          type: 'code',
+	          raw: raw,
+	          lang: cap[2] ? cap[2].trim() : cap[2],
+	          text: text
+	        };
+	      }
+	    }
+	  }, {
+	    key: "heading",
+	    value: function heading(src) {
+	      var cap = this.rules.block.heading.exec(src);
 
-	    function pointercancel() {
-	        var id = (event.pointerId || 'mouse').toString();
-	        if (!_downPointers[id]) { return; }
+	      if (cap) {
+	        var text = cap[2].trim(); // remove trailing #s
 
-	        delete _downPointers[id];
+	        if (/#$/.test(text)) {
+	          var trimmed = rtrim(text, '#');
 
-	        if (_multiselectionPointerId === id) {
-	            _multiselectionPointerId = null;
+	          if (this.options.pedantic) {
+	            text = trimmed.trim();
+	          } else if (!trimmed || / $/.test(trimmed)) {
+	            // CommonMark requires space before trailing #s
+	            text = trimmed.trim();
+	          }
 	        }
-	    }
-
 
-	    function contextmenu() {
-	        var e = event;
-	        e.preventDefault();
+	        return {
+	          type: 'heading',
+	          raw: cap[0],
+	          depth: cap[1].length,
+	          text: text
+	        };
+	      }
+	    }
+	  }, {
+	    key: "nptable",
+	    value: function nptable(src) {
+	      var cap = this.rules.block.nptable.exec(src);
+
+	      if (cap) {
+	        var item = {
+	          type: 'table',
+	          header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
+	          align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+	          cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : [],
+	          raw: cap[0]
+	        };
 
-	        if (!+e.clientX && !+e.clientY) {
-	            if (_lastMouseEvent) {
-	                e.sourceEvent = _lastMouseEvent;
+	        if (item.header.length === item.align.length) {
+	          var l = item.align.length;
+	          var i;
+
+	          for (i = 0; i < l; i++) {
+	            if (/^ *-+: *$/.test(item.align[i])) {
+	              item.align[i] = 'right';
+	            } else if (/^ *:-+: *$/.test(item.align[i])) {
+	              item.align[i] = 'center';
+	            } else if (/^ *:-+ *$/.test(item.align[i])) {
+	              item.align[i] = 'left';
 	            } else {
-	                return;
+	              item.align[i] = null;
 	            }
-	        } else {
-	            _lastMouseEvent = event;
-	            _lastInteractionType = 'rightclick';
-	        }
-
-	        _showMenu = true;
-	        click(event, event);
-	    }
+	          }
 
+	          l = item.cells.length;
 
-	    function click(firstEvent, lastEvent, pointerId) {
-	        cancelLongPress();
+	          for (i = 0; i < l; i++) {
+	            item.cells[i] = splitCells(item.cells[i], item.header.length);
+	          }
 
-	        var mapNode = context.container().select('.main-map').node();
+	          return item;
+	        }
+	      }
+	    }
+	  }, {
+	    key: "hr",
+	    value: function hr(src) {
+	      var cap = this.rules.block.hr.exec(src);
 
-	        // Use the `main-map` coordinate system since the surface and supersurface
-	        // are transformed when drag-panning.
-	        var pointGetter = utilFastMouse(mapNode);
-	        var p1 = pointGetter(firstEvent);
-	        var p2 = pointGetter(lastEvent);
-	        var dist = geoVecLength(p1, p2);
+	      if (cap) {
+	        return {
+	          type: 'hr',
+	          raw: cap[0]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "blockquote",
+	    value: function blockquote(src) {
+	      var cap = this.rules.block.blockquote.exec(src);
 
-	        if (dist > _tolerancePx ||
-	            !mapContains(lastEvent)) {
+	      if (cap) {
+	        var text = cap[0].replace(/^ *> ?/gm, '');
+	        return {
+	          type: 'blockquote',
+	          raw: cap[0],
+	          text: text
+	        };
+	      }
+	    }
+	  }, {
+	    key: "list",
+	    value: function list(src) {
+	      var cap = this.rules.block.list.exec(src);
+
+	      if (cap) {
+	        var raw = cap[0];
+	        var bull = cap[2];
+	        var isordered = bull.length > 1;
+	        var list = {
+	          type: 'list',
+	          raw: raw,
+	          ordered: isordered,
+	          start: isordered ? +bull.slice(0, -1) : '',
+	          loose: false,
+	          items: []
+	        }; // Get each top-level item.
+
+	        var itemMatch = cap[0].match(this.rules.block.item);
+	        var next = false,
+	            item,
+	            space,
+	            bcurr,
+	            bnext,
+	            addBack,
+	            loose,
+	            istask,
+	            ischecked,
+	            endMatch;
+	        var l = itemMatch.length;
+	        bcurr = this.rules.block.listItemStart.exec(itemMatch[0]);
+
+	        for (var i = 0; i < l; i++) {
+	          item = itemMatch[i];
+	          raw = item;
+
+	          if (!this.options.pedantic) {
+	            // Determine if current item contains the end of the list
+	            endMatch = item.match(new RegExp('\\n\\s*\\n {0,' + (bcurr[0].length - 1) + '}\\S'));
+
+	            if (endMatch) {
+	              addBack = item.length - endMatch.index + itemMatch.slice(i + 1).join('\n').length;
+	              list.raw = list.raw.substring(0, list.raw.length - addBack);
+	              item = item.substring(0, endMatch.index);
+	              raw = item;
+	              l = i + 1;
+	            }
+	          } // Determine whether the next list item belongs here.
+	          // Backpedal if it does not belong in this list.
+
+
+	          if (i !== l - 1) {
+	            bnext = this.rules.block.listItemStart.exec(itemMatch[i + 1]);
+
+	            if (!this.options.pedantic ? bnext[1].length >= bcurr[0].length || bnext[1].length > 3 : bnext[1].length > bcurr[1].length) {
+	              // nested list or continuation
+	              itemMatch.splice(i, 2, itemMatch[i] + (!this.options.pedantic && bnext[1].length < bcurr[0].length && !itemMatch[i].match(/\n$/) ? '' : '\n') + itemMatch[i + 1]);
+	              i--;
+	              l--;
+	              continue;
+	            } else if ( // different bullet style
+	            !this.options.pedantic || this.options.smartLists ? bnext[2][bnext[2].length - 1] !== bull[bull.length - 1] : isordered === (bnext[2].length === 1)) {
+	              addBack = itemMatch.slice(i + 1).join('\n').length;
+	              list.raw = list.raw.substring(0, list.raw.length - addBack);
+	              i = l - 1;
+	            }
+
+	            bcurr = bnext;
+	          } // Remove the list item's bullet
+	          // so it is seen as the next token.
+
+
+	          space = item.length;
+	          item = item.replace(/^ *([*+-]|\d+[.)]) ?/, ''); // Outdent whatever the
+	          // list item contains. Hacky.
+
+	          if (~item.indexOf('\n ')) {
+	            space -= item.length;
+	            item = !this.options.pedantic ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '') : item.replace(/^ {1,4}/gm, '');
+	          } // trim item newlines at end
+
+
+	          item = rtrim(item, '\n');
+
+	          if (i !== l - 1) {
+	            raw = raw + '\n';
+	          } // Determine whether item is loose or not.
+	          // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
+	          // for discount behavior.
+
+
+	          loose = next || /\n\n(?!\s*$)/.test(raw);
+
+	          if (i !== l - 1) {
+	            next = raw.slice(-2) === '\n\n';
+	            if (!loose) loose = next;
+	          }
 
-	            resetProperties();
-	            return;
-	        }
+	          if (loose) {
+	            list.loose = true;
+	          } // Check for task list items
 
-	        var targetDatum = lastEvent.target.__data__;
 
-	        var multiselectEntityId;
+	          if (this.options.gfm) {
+	            istask = /^\[[ xX]\] /.test(item);
+	            ischecked = undefined;
 
-	        if (!_multiselectionPointerId) {
-	            // If a different pointer than the one triggering this click is down on a
-	            // feature, treat this and all future clicks as multiselection until that
-	            // pointer is raised.
-	            var selectPointerInfo = pointerDownOnSelection(pointerId);
-	            if (selectPointerInfo) {
-	                _multiselectionPointerId = selectPointerInfo.pointerId;
-	                // if the other feature isn't selected yet, make sure we select it
-	                multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
-	                _downPointers[selectPointerInfo.pointerId].done = true;
+	            if (istask) {
+	              ischecked = item[1] !== ' ';
+	              item = item.replace(/^\[[ xX]\] +/, '');
 	            }
-	        }
-
-	        // support multiselect if data is already selected
-	        var isMultiselect = context.mode().id === 'select' && (
-	            // and shift key is down
-	            (event && event.shiftKey) ||
-	            // or we're lasso-selecting
-	            context.surface().select('.lasso').node() ||
-	            // or a pointer is down over a selected feature
-	            (_multiselectionPointerId && !multiselectEntityId)
-	        );
-
-	        processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
+	          }
 
-	        function mapContains(event) {
-	            var rect = mapNode.getBoundingClientRect();
-	            return event.clientX >= rect.left &&
-	                event.clientX <= rect.right &&
-	                event.clientY >= rect.top &&
-	                event.clientY <= rect.bottom;
+	          list.items.push({
+	            type: 'list_item',
+	            raw: raw,
+	            task: istask,
+	            checked: ischecked,
+	            loose: loose,
+	            text: item
+	          });
 	        }
 
-	        function pointerDownOnSelection(skipPointerId) {
-	            var mode = context.mode();
-	            var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];
-	            for (var pointerId in _downPointers) {
-	                if (pointerId === 'spacebar' || pointerId === skipPointerId) { continue; }
-
-	                var pointerInfo = _downPointers[pointerId];
+	        return list;
+	      }
+	    }
+	  }, {
+	    key: "html",
+	    value: function html(src) {
+	      var cap = this.rules.block.html.exec(src);
 
-	                var p1 = pointGetter(pointerInfo.firstEvent);
-	                var p2 = pointGetter(pointerInfo.lastEvent);
-	                if (geoVecLength(p1, p2) > _tolerancePx) { continue; }
+	      if (cap) {
+	        return {
+	          type: this.options.sanitize ? 'paragraph' : 'html',
+	          raw: cap[0],
+	          pre: !this.options.sanitizer && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
+	          text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "def",
+	    value: function def(src) {
+	      var cap = this.rules.block.def.exec(src);
 
-	                var datum = pointerInfo.firstEvent.target.__data__;
-	                var entity = (datum && datum.properties && datum.properties.entity) || datum;
-	                if (context.graph().hasEntity(entity.id)) { return {
-	                    pointerId: pointerId,
-	                    entityId: entity.id,
-	                    selected: selectedIDs.indexOf(entity.id) !== -1
-	                }; }
-	            }
-	            return null;
-	        }
+	      if (cap) {
+	        if (cap[3]) cap[3] = cap[3].substring(1, cap[3].length - 1);
+	        var tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
+	        return {
+	          type: 'def',
+	          tag: tag,
+	          raw: cap[0],
+	          href: cap[2],
+	          title: cap[3]
+	        };
+	      }
 	    }
+	  }, {
+	    key: "table",
+	    value: function table(src) {
+	      var cap = this.rules.block.table.exec(src);
+
+	      if (cap) {
+	        var item = {
+	          type: 'table',
+	          header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
+	          align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+	          cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
+	        };
 
+	        if (item.header.length === item.align.length) {
+	          item.raw = cap[0];
+	          var l = item.align.length;
+	          var i;
+
+	          for (i = 0; i < l; i++) {
+	            if (/^ *-+: *$/.test(item.align[i])) {
+	              item.align[i] = 'right';
+	            } else if (/^ *:-+: *$/.test(item.align[i])) {
+	              item.align[i] = 'center';
+	            } else if (/^ *:-+ *$/.test(item.align[i])) {
+	              item.align[i] = 'left';
+	            } else {
+	              item.align[i] = null;
+	            }
+	          }
 
-	    function processClick(datum, isMultiselect, point, alsoSelectId) {
-	        var mode = context.mode();
-	        var showMenu = _showMenu;
-	        var interactionType = _lastInteractionType;
+	          l = item.cells.length;
 
-	        var entity = datum && datum.properties && datum.properties.entity;
-	        if (entity) { datum = entity; }
+	          for (i = 0; i < l; i++) {
+	            item.cells[i] = splitCells(item.cells[i].replace(/^ *\| *| *\| *$/g, ''), item.header.length);
+	          }
 
-	        if (datum && datum.type === 'midpoint') {
-	            // treat targeting midpoints as if targeting the parent way
-	            datum = datum.parents[0];
+	          return item;
 	        }
+	      }
+	    }
+	  }, {
+	    key: "lheading",
+	    value: function lheading(src) {
+	      var cap = this.rules.block.lheading.exec(src);
 
-	        var newMode;
-
-	        if (datum instanceof osmEntity) {
-	            // targeting an entity
-	            var selectedIDs = context.selectedIDs();
-	            context.selectedNoteID(null);
-	            context.selectedErrorID(null);
-
-	            if (!isMultiselect) {
-	                // don't change the selection if we're toggling the menu atop a multiselection
-	                if (!showMenu ||
-	                    selectedIDs.length <= 1 ||
-	                    selectedIDs.indexOf(datum.id) === -1) {
-
-	                    if (alsoSelectId === datum.id) { alsoSelectId = null; }
-
-	                    selectedIDs = (alsoSelectId ? [alsoSelectId] : []).concat([datum.id]);
-	                    // always enter modeSelect even if the entity is already
-	                    // selected since listeners may expect `context.enter` events,
-	                    // e.g. in the walkthrough
-	                    newMode = mode.id === 'select' ? mode.selectedIDs(selectedIDs) : modeSelect(context, selectedIDs).selectBehavior(behavior);
-	                    context.enter(newMode);
-	                }
-
-	            } else {
-	                if (selectedIDs.indexOf(datum.id) !== -1) {
-	                    // clicked entity is already in the selectedIDs list..
-	                    if (!showMenu) {
-	                        // deselect clicked entity, then reenter select mode or return to browse mode..
-	                        selectedIDs = selectedIDs.filter(function(id) { return id !== datum.id; });
-	                        newMode = selectedIDs.length ? mode.selectedIDs(selectedIDs) : modeBrowse(context).selectBehavior(behavior);
-	                        context.enter(newMode);
-	                    }
-	                } else {
-	                    // clicked entity is not in the selected list, add it..
-	                    selectedIDs = selectedIDs.concat([datum.id]);
-	                    newMode = mode.selectedIDs(selectedIDs);
-	                    context.enter(newMode);
-	                }
-	            }
+	      if (cap) {
+	        return {
+	          type: 'heading',
+	          raw: cap[0],
+	          depth: cap[2].charAt(0) === '=' ? 1 : 2,
+	          text: cap[1]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "paragraph",
+	    value: function paragraph(src) {
+	      var cap = this.rules.block.paragraph.exec(src);
 
-	        } else if (datum && datum.__featurehash__ && !isMultiselect) {
-	            // targeting custom data
-	            context
-	                .selectedNoteID(null)
-	                .enter(modeSelectData(context, datum));
+	      if (cap) {
+	        return {
+	          type: 'paragraph',
+	          raw: cap[0],
+	          text: cap[1].charAt(cap[1].length - 1) === '\n' ? cap[1].slice(0, -1) : cap[1]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "text",
+	    value: function text(src) {
+	      var cap = this.rules.block.text.exec(src);
 
-	        } else if (datum instanceof osmNote && !isMultiselect) {
-	            // targeting a note
-	            context
-	                .selectedNoteID(datum.id)
-	                .enter(modeSelectNote(context, datum.id));
+	      if (cap) {
+	        return {
+	          type: 'text',
+	          raw: cap[0],
+	          text: cap[0]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "escape",
+	    value: function escape(src) {
+	      var cap = this.rules.inline.escape.exec(src);
 
-	        } else if (datum instanceof QAItem & !isMultiselect) {
-	            // targeting an external QA issue
-	            context
-	                .selectedErrorID(datum.id)
-	                .enter(modeSelectError(context, datum.id, datum.service));
+	      if (cap) {
+	        return {
+	          type: 'escape',
+	          raw: cap[0],
+	          text: _escape(cap[1])
+	        };
+	      }
+	    }
+	  }, {
+	    key: "tag",
+	    value: function tag(src, inLink, inRawBlock) {
+	      var cap = this.rules.inline.tag.exec(src);
 
-	        } else {
-	            // targeting nothing
-	            context.selectedNoteID(null);
-	            context.selectedErrorID(null);
-	            if (!isMultiselect && mode.id !== 'browse') {
-	                context.enter(modeBrowse(context));
-	            }
+	      if (cap) {
+	        if (!inLink && /^<a /i.test(cap[0])) {
+	          inLink = true;
+	        } else if (inLink && /^<\/a>/i.test(cap[0])) {
+	          inLink = false;
 	        }
 
-	        context.ui().closeEditMenu();
-
-	        // always request to show the edit menu in case the mode needs it
-	        if (showMenu) { context.ui().showEditMenu(point, interactionType); }
+	        if (!inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+	          inRawBlock = true;
+	        } else if (inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+	          inRawBlock = false;
+	        }
 
-	        resetProperties();
+	        return {
+	          type: this.options.sanitize ? 'text' : 'html',
+	          raw: cap[0],
+	          inLink: inLink,
+	          inRawBlock: inRawBlock,
+	          text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
+	        };
+	      }
 	    }
+	  }, {
+	    key: "link",
+	    value: function link(src) {
+	      var cap = this.rules.inline.link.exec(src);
 
+	      if (cap) {
+	        var trimmedUrl = cap[2].trim();
 
-	    function cancelLongPress() {
-	        if (_longPressTimeout) { window.clearTimeout(_longPressTimeout); }
-	        _longPressTimeout = null;
-	    }
-
+	        if (!this.options.pedantic && /^</.test(trimmedUrl)) {
+	          // commonmark requires matching angle brackets
+	          if (!/>$/.test(trimmedUrl)) {
+	            return;
+	          } // ending angle bracket cannot be escaped
 
-	    function resetProperties() {
-	        cancelLongPress();
-	        _showMenu = false;
-	        _lastInteractionType = null;
-	        // don't reset _lastMouseEvent since it might still be useful
-	    }
-
-
-	    function behavior(selection) {
-	        resetProperties();
-	        _lastMouseEvent = context.map().lastPointerEvent();
-
-	        select(window)
-	            .on('keydown.select', keydown)
-	            .on('keyup.select', keyup)
-	            .on(_pointerPrefix + 'move.select', pointermove, true)
-	            .on(_pointerPrefix + 'up.select', pointerup, true)
-	            .on('pointercancel.select', pointercancel, true)
-	            .on('contextmenu.select-window', function() {
-	                // Edge and IE really like to show the contextmenu on the
-	                // menubar when user presses a keyboard menu button
-	                // even after we've already preventdefaulted the key event.
-	                var e = event;
-	                if (+e.clientX === 0 && +e.clientY === 0) {
-	                    event.preventDefault();
-	                }
-	            });
 
-	        selection
-	            .on(_pointerPrefix + 'down.select', pointerdown)
-	            .on('contextmenu.select', contextmenu);
+	          var rtrimSlash = rtrim(trimmedUrl.slice(0, -1), '\\');
 
-	        if (event && event.shiftKey) {
-	            context.surface()
-	                .classed('behavior-multiselect', true);
+	          if ((trimmedUrl.length - rtrimSlash.length) % 2 === 0) {
+	            return;
+	          }
+	        } else {
+	          // find closing parenthesis
+	          var lastParenIndex = findClosingBracket(cap[2], '()');
+
+	          if (lastParenIndex > -1) {
+	            var start = cap[0].indexOf('!') === 0 ? 5 : 4;
+	            var linkLen = start + cap[1].length + lastParenIndex;
+	            cap[2] = cap[2].substring(0, lastParenIndex);
+	            cap[0] = cap[0].substring(0, linkLen).trim();
+	            cap[3] = '';
+	          }
 	        }
-	    }
-
 
-	    behavior.off = function(selection) {
-	        cancelLongPress();
+	        var href = cap[2];
+	        var title = '';
 
-	        select(window)
-	            .on('keydown.select', null)
-	            .on('keyup.select', null)
-	            .on('contextmenu.select-window', null)
-	            .on(_pointerPrefix + 'move.select', null, true)
-	            .on(_pointerPrefix + 'up.select', null, true)
-	            .on('pointercancel.select', null, true);
+	        if (this.options.pedantic) {
+	          // split pedantic href and title
+	          var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
 
-	        selection
-	            .on(_pointerPrefix + 'down.select', null)
-	            .on('contextmenu.select', null);
+	          if (link) {
+	            href = link[1];
+	            title = link[3];
+	          }
+	        } else {
+	          title = cap[3] ? cap[3].slice(1, -1) : '';
+	        }
 
-	        context.surface()
-	            .classed('behavior-multiselect', false);
-	    };
+	        href = href.trim();
 
+	        if (/^</.test(href)) {
+	          if (this.options.pedantic && !/>$/.test(trimmedUrl)) {
+	            // pedantic allows starting angle bracket without ending angle bracket
+	            href = href.slice(1);
+	          } else {
+	            href = href.slice(1, -1);
+	          }
+	        }
 
-	    return behavior;
-	}
+	        return outputLink(cap, {
+	          href: href ? href.replace(this.rules.inline._escapes, '$1') : href,
+	          title: title ? title.replace(this.rules.inline._escapes, '$1') : title
+	        }, cap[0]);
+	      }
+	    }
+	  }, {
+	    key: "reflink",
+	    value: function reflink(src, links) {
+	      var cap;
 
-	function behaviorDrawWay(context, wayID, mode, startGraph) {
+	      if ((cap = this.rules.inline.reflink.exec(src)) || (cap = this.rules.inline.nolink.exec(src))) {
+	        var link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
+	        link = links[link.toLowerCase()];
 
-	    var dispatch$1 = dispatch('rejectedSelfIntersection');
+	        if (!link || !link.href) {
+	          var text = cap[0].charAt(0);
+	          return {
+	            type: 'text',
+	            raw: text,
+	            text: text
+	          };
+	        }
 
-	    var behavior = behaviorDraw(context);
+	        return outputLink(cap, link, cap[0]);
+	      }
+	    }
+	  }, {
+	    key: "emStrong",
+	    value: function emStrong(src, maskedSrc) {
+	      var prevChar = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : '';
+	      var match = this.rules.inline.emStrong.lDelim.exec(src);
+	      if (!match) return; // _ can't be between two alphanumerics. \p{L}\p{N} includes non-english alphabet/numbers as well
+
+	      if (match[3] && prevChar.match(/(?:[0-9A-Za-z\xAA\xB2\xB3\xB5\xB9\xBA\xBC-\xBE\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u052F\u0531-\u0556\u0559\u0560-\u0588\u05D0-\u05EA\u05EF-\u05F2\u0620-\u064A\u0660-\u0669\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07C0-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u0860-\u086A\u0870-\u0887\u0889-\u088E\u08A0-\u08C9\u0904-\u0939\u093D\u0950\u0958-\u0961\u0966-\u096F\u0971-\u0980\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09E6-\u09F1\u09F4-\u09F9\u09FC\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A66-\u0A6F\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0AE6-\u0AEF\u0AF9\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B66-\u0B6F\u0B71-\u0B77\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0BE6-\u0BF2\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D\u0C58-\u0C5A\u0C5D\u0C60\u0C61\u0C66-\u0C6F\u0C78-\u0C7E\u0C80\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDD\u0CDE\u0CE0\u0CE1\u0CE6-\u0CEF\u0CF1\u0CF2\u0D04-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D54-\u0D56\u0D58-\u0D61\u0D66-\u0D78\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0DE6-\u0DEF\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E50-\u0E59\u0E81\u0E82\u0E84\u0E86-\u0E8A\u0E8C-\u0EA3\u0EA5\u0EA7-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0ED0-\u0ED9\u0EDC-\u0EDF\u0F00\u0F20-\u0F33\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F-\u1049\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u1090-\u1099\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1369-\u137C\u1380-\u138F\u13A0-\u13F5\u13F8-\u13FD\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u1711\u171F-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u17E0-\u17E9\u17F0-\u17F9\u1810-\u1819\u1820-\u1878\u1880-\u1884\u1887-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191E\u1946-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u19D0-\u19DA\u1A00-\u1A16\u1A20-\u1A54\u1A80-\u1A89\u1A90-\u1A99\u1AA7\u1B05-\u1B33\u1B45-\u1B4C\u1B50-\u1B59\u1B83-\u1BA0\u1BAE-\u1BE5\u1C00-\u1C23\u1C40-\u1C49\u1C4D-\u1C7D\u1C80-\u1C88\u1C90-\u1CBA\u1CBD-\u1CBF\u1CE9-\u1CEC\u1CEE-\u1CF3\u1CF5\u1CF6\u1CFA\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2070\u2071\u2074-\u2079\u207F-\u2089\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2150-\u2189\u2460-\u249B\u24EA-\u24FF\u2776-\u2793\u2C00-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2CFD\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312F\u3131-\u318E\u3192-\u3195\u31A0-\u31BF\u31F0-\u31FF\u3220-\u3229\u3248-\u324F\u3251-\u325F\u3280-\u3289\u32B1-\u32BF\u3400-\u4DBF\u4E00-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA7CA\uA7D0\uA7D1\uA7D3\uA7D5-\uA7D9\uA7F2-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA830-\uA835\uA840-\uA873\uA882-\uA8B3\uA8D0-\uA8D9\uA8F2-\uA8F7\uA8FB\uA8FD\uA8FE\uA900-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF-\uA9D9\uA9E0-\uA9E4\uA9E6-\uA9FE\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA50-\uAA59\uAA60-\uAA76\uAA7A\uAA7E-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB69\uAB70-\uABE2\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF10-\uFF19\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD07-\uDD33\uDD40-\uDD78\uDD8A\uDD8B\uDE80-\uDE9C\uDEA0-\uDED0\uDEE1-\uDEFB\uDF00-\uDF23\uDF2D-\uDF4A\uDF50-\uDF75\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDCA0-\uDCA9\uDCB0-\uDCD3\uDCD8-\uDCFB\uDD00-\uDD27\uDD30-\uDD63\uDD70-\uDD7A\uDD7C-\uDD8A\uDD8C-\uDD92\uDD94\uDD95\uDD97-\uDDA1\uDDA3-\uDDB1\uDDB3-\uDDB9\uDDBB\uDDBC\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67\uDF80-\uDF85\uDF87-\uDFB0\uDFB2-\uDFBA]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC58-\uDC76\uDC79-\uDC9E\uDCA7-\uDCAF\uDCE0-\uDCF2\uDCF4\uDCF5\uDCFB-\uDD1B\uDD20-\uDD39\uDD80-\uDDB7\uDDBC-\uDDCF\uDDD2-\uDE00\uDE10-\uDE13\uDE15-\uDE17\uDE19-\uDE35\uDE40-\uDE48\uDE60-\uDE7E\uDE80-\uDE9F\uDEC0-\uDEC7\uDEC9-\uDEE4\uDEEB-\uDEEF\uDF00-\uDF35\uDF40-\uDF55\uDF58-\uDF72\uDF78-\uDF91\uDFA9-\uDFAF]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2\uDCFA-\uDD23\uDD30-\uDD39\uDE60-\uDE7E\uDE80-\uDEA9\uDEB0\uDEB1\uDF00-\uDF27\uDF30-\uDF45\uDF51-\uDF54\uDF70-\uDF81\uDFB0-\uDFCB\uDFE0-\uDFF6]|\uD804[\uDC03-\uDC37\uDC52-\uDC6F\uDC71\uDC72\uDC75\uDC83-\uDCAF\uDCD0-\uDCE8\uDCF0-\uDCF9\uDD03-\uDD26\uDD36-\uDD3F\uDD44\uDD47\uDD50-\uDD72\uDD76\uDD83-\uDDB2\uDDC1-\uDDC4\uDDD0-\uDDDA\uDDDC\uDDE1-\uDDF4\uDE00-\uDE11\uDE13-\uDE2B\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEDE\uDEF0-\uDEF9\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3D\uDF50\uDF5D-\uDF61]|\uD805[\uDC00-\uDC34\uDC47-\uDC4A\uDC50-\uDC59\uDC5F-\uDC61\uDC80-\uDCAF\uDCC4\uDCC5\uDCC7\uDCD0-\uDCD9\uDD80-\uDDAE\uDDD8-\uDDDB\uDE00-\uDE2F\uDE44\uDE50-\uDE59\uDE80-\uDEAA\uDEB8\uDEC0-\uDEC9\uDF00-\uDF1A\uDF30-\uDF3B\uDF40-\uDF46]|\uD806[\uDC00-\uDC2B\uDCA0-\uDCF2\uDCFF-\uDD06\uDD09\uDD0C-\uDD13\uDD15\uDD16\uDD18-\uDD2F\uDD3F\uDD41\uDD50-\uDD59\uDDA0-\uDDA7\uDDAA-\uDDD0\uDDE1\uDDE3\uDE00\uDE0B-\uDE32\uDE3A\uDE50\uDE5C-\uDE89\uDE9D\uDEB0-\uDEF8]|\uD807[\uDC00-\uDC08\uDC0A-\uDC2E\uDC40\uDC50-\uDC6C\uDC72-\uDC8F\uDD00-\uDD06\uDD08\uDD09\uDD0B-\uDD30\uDD46\uDD50-\uDD59\uDD60-\uDD65\uDD67\uDD68\uDD6A-\uDD89\uDD98\uDDA0-\uDDA9\uDEE0-\uDEF2\uDFB0\uDFC0-\uDFD4]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|\uD80B[\uDF90-\uDFF0]|[\uD80C\uD81C-\uD820\uD822\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872\uD874-\uD879\uD880-\uD883][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDE60-\uDE69\uDE70-\uDEBE\uDEC0-\uDEC9\uDED0-\uDEED\uDF00-\uDF2F\uDF40-\uDF43\uDF50-\uDF59\uDF5B-\uDF61\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDE40-\uDE96\uDF00-\uDF4A\uDF50\uDF93-\uDF9F\uDFE0\uDFE1\uDFE3]|\uD821[\uDC00-\uDFF7]|\uD823[\uDC00-\uDCD5\uDD00-\uDD08]|\uD82B[\uDFF0-\uDFF3\uDFF5-\uDFFB\uDFFD\uDFFE]|\uD82C[\uDC00-\uDD22\uDD50-\uDD52\uDD64-\uDD67\uDD70-\uDEFB]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99]|\uD834[\uDEE0-\uDEF3\uDF60-\uDF78]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB\uDFCE-\uDFFF]|\uD837[\uDF00-\uDF1E]|\uD838[\uDD00-\uDD2C\uDD37-\uDD3D\uDD40-\uDD49\uDD4E\uDE90-\uDEAD\uDEC0-\uDEEB\uDEF0-\uDEF9]|\uD839[\uDFE0-\uDFE6\uDFE8-\uDFEB\uDFED\uDFEE\uDFF0-\uDFFE]|\uD83A[\uDC00-\uDCC4\uDCC7-\uDCCF\uDD00-\uDD43\uDD4B\uDD50-\uDD59]|\uD83B[\uDC71-\uDCAB\uDCAD-\uDCAF\uDCB1-\uDCB4\uDD01-\uDD2D\uDD2F-\uDD3D\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD83C[\uDD00-\uDD0C]|\uD83E[\uDFF0-\uDFF9]|\uD869[\uDC00-\uDEDF\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF38\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEA1\uDEB0-\uDFFF]|\uD87A[\uDC00-\uDFE0]|\uD87E[\uDC00-\uDE1D]|\uD884[\uDC00-\uDF4A])/)) return;
+	      var nextChar = match[1] || match[2] || '';
+
+	      if (!nextChar || nextChar && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar))) {
+	        var lLength = match[0].length - 1;
+	        var rDelim,
+	            rLength,
+	            delimTotal = lLength,
+	            midDelimTotal = 0;
+	        var endReg = match[0][0] === '*' ? this.rules.inline.emStrong.rDelimAst : this.rules.inline.emStrong.rDelimUnd;
+	        endReg.lastIndex = 0; // Clip maskedSrc to same section of string as src (move to lexer?)
+
+	        maskedSrc = maskedSrc.slice(-1 * src.length + lLength);
+
+	        while ((match = endReg.exec(maskedSrc)) != null) {
+	          rDelim = match[1] || match[2] || match[3] || match[4] || match[5] || match[6];
+	          if (!rDelim) continue; // skip single * in __abc*abc__
+
+	          rLength = rDelim.length;
+
+	          if (match[3] || match[4]) {
+	            // found another Left Delim
+	            delimTotal += rLength;
+	            continue;
+	          } else if (match[5] || match[6]) {
+	            // either Left or Right Delim
+	            if (lLength % 3 && !((lLength + rLength) % 3)) {
+	              midDelimTotal += rLength;
+	              continue; // CommonMark Emphasis Rules 9-10
+	            }
+	          }
 
-	    // Must be set by `drawWay.nodeIndex` before each install of this behavior.
-	    var _nodeIndex;
+	          delimTotal -= rLength;
+	          if (delimTotal > 0) continue; // Haven't found enough closing delimiters
+	          // Remove extra characters. *a*** -> *a*
 
-	    var _origWay;
-	    var _wayGeometry;
-	    var _headNodeID;
-	    var _annotation;
+	          rLength = Math.min(rLength, rLength + delimTotal + midDelimTotal); // Create `em` if smallest delimiter has odd char count. *a***
 
-	    var _pointerHasMoved = false;
+	          if (Math.min(lLength, rLength) % 2) {
+	            return {
+	              type: 'em',
+	              raw: src.slice(0, lLength + match.index + rLength + 1),
+	              text: src.slice(1, lLength + match.index + rLength)
+	            };
+	          } // Create 'strong' if smallest delimiter has even char count. **a***
 
-	    // The osmNode to be placed.
-	    // This is temporary and just follows the mouse cursor until an "add" event occurs.
-	    var _drawNode;
 
-	    var _didResolveTempEdit = false;
+	          return {
+	            type: 'strong',
+	            raw: src.slice(0, lLength + match.index + rLength + 1),
+	            text: src.slice(2, lLength + match.index + rLength - 1)
+	          };
+	        }
+	      }
+	    }
+	  }, {
+	    key: "codespan",
+	    value: function codespan(src) {
+	      var cap = this.rules.inline.code.exec(src);
 
-	    function createDrawNode(loc) {
-	        // don't make the draw node until we actually need it
-	        _drawNode = osmNode({ loc: loc });
+	      if (cap) {
+	        var text = cap[2].replace(/\n/g, ' ');
+	        var hasNonSpaceChars = /[^ ]/.test(text);
+	        var hasSpaceCharsOnBothEnds = /^ /.test(text) && / $/.test(text);
 
-	        context.pauseChangeDispatch();
-	        context.replace(function actionAddDrawNode(graph) {
-	            // add the draw node to the graph and insert it into the way
-	            var way = graph.entity(wayID);
-	            return graph
-	                .replace(_drawNode)
-	                .replace(way.addNode(_drawNode.id, _nodeIndex));
-	        }, _annotation);
-	        context.resumeChangeDispatch();
+	        if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
+	          text = text.substring(1, text.length - 1);
+	        }
 
-	        setActiveElements();
+	        text = _escape(text, true);
+	        return {
+	          type: 'codespan',
+	          raw: cap[0],
+	          text: text
+	        };
+	      }
 	    }
+	  }, {
+	    key: "br",
+	    value: function br(src) {
+	      var cap = this.rules.inline.br.exec(src);
 
-	    function removeDrawNode() {
-
-	        context.pauseChangeDispatch();
-	        context.replace(
-	            function actionDeleteDrawNode(graph) {
-	               var way = graph.entity(wayID);
-	               return graph
-	                   .replace(way.removeNode(_drawNode.id))
-	                   .remove(_drawNode);
-	           },
-	            _annotation
-	        );
-	        _drawNode = undefined;
-	        context.resumeChangeDispatch();
+	      if (cap) {
+	        return {
+	          type: 'br',
+	          raw: cap[0]
+	        };
+	      }
 	    }
+	  }, {
+	    key: "del",
+	    value: function del(src) {
+	      var cap = this.rules.inline.del.exec(src);
 
-
-	    function keydown() {
-	        if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            if (context.surface().classed('nope')) {
-	                context.surface()
-	                    .classed('nope-suppressed', true);
-	            }
-	            context.surface()
-	                .classed('nope', false)
-	                .classed('nope-disabled', true);
-	        }
+	      if (cap) {
+	        return {
+	          type: 'del',
+	          raw: cap[0],
+	          text: cap[2]
+	        };
+	      }
 	    }
+	  }, {
+	    key: "autolink",
+	    value: function autolink(src, mangle) {
+	      var cap = this.rules.inline.autolink.exec(src);
 
+	      if (cap) {
+	        var text, href;
 
-	    function keyup() {
-	        if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            if (context.surface().classed('nope-suppressed')) {
-	                context.surface()
-	                    .classed('nope', true);
-	            }
-	            context.surface()
-	                .classed('nope-suppressed', false)
-	                .classed('nope-disabled', false);
+	        if (cap[2] === '@') {
+	          text = _escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
+	          href = 'mailto:' + text;
+	        } else {
+	          text = _escape(cap[1]);
+	          href = text;
 	        }
-	    }
-
 
-	    function allowsVertex(d) {
-	        return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+	        return {
+	          type: 'link',
+	          raw: cap[0],
+	          text: text,
+	          href: href,
+	          tokens: [{
+	            type: 'text',
+	            raw: text,
+	            text: text
+	          }]
+	        };
+	      }
 	    }
+	  }, {
+	    key: "url",
+	    value: function url(src, mangle) {
+	      var cap;
 
+	      if (cap = this.rules.inline.url.exec(src)) {
+	        var text, href;
 
-	    // related code
-	    // - `mode/drag_node.js`     `doMove()`
-	    // - `behavior/draw.js`      `click()`
-	    // - `behavior/draw_way.js`  `move()`
-	    function move(datum) {
+	        if (cap[2] === '@') {
+	          text = _escape(this.options.mangle ? mangle(cap[0]) : cap[0]);
+	          href = 'mailto:' + text;
+	        } else {
+	          // do extended autolink path validation
+	          var prevCapZero;
 
-	        var loc = context.map().mouseCoordinates();
+	          do {
+	            prevCapZero = cap[0];
+	            cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
+	          } while (prevCapZero !== cap[0]);
 
-	        if (!_drawNode) { createDrawNode(loc); }
+	          text = _escape(cap[0]);
 
-	        context.surface().classed('nope-disabled', event.altKey);
+	          if (cap[1] === 'www.') {
+	            href = 'http://' + text;
+	          } else {
+	            href = text;
+	          }
+	        }
 
-	        var targetLoc = datum && datum.properties && datum.properties.entity &&
-	            allowsVertex(datum.properties.entity) && datum.properties.entity.loc;
-	        var targetNodes = datum && datum.properties && datum.properties.nodes;
+	        return {
+	          type: 'link',
+	          raw: cap[0],
+	          text: text,
+	          href: href,
+	          tokens: [{
+	            type: 'text',
+	            raw: text,
+	            text: text
+	          }]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "inlineText",
+	    value: function inlineText(src, inRawBlock, smartypants) {
+	      var cap = this.rules.inline.text.exec(src);
 
-	        if (targetLoc) {   // snap to node/vertex - a point target with `.loc`
-	            loc = targetLoc;
+	      if (cap) {
+	        var text;
 
-	        } else if (targetNodes) {   // snap to way - a line target with `.nodes`
-	            var choice = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, _drawNode.id);
-	            if (choice) {
-	                loc = choice.loc;
-	            }
+	        if (inRawBlock) {
+	          text = this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0];
+	        } else {
+	          text = _escape(this.options.smartypants ? smartypants(cap[0]) : cap[0]);
 	        }
 
-	        context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
-	        _drawNode = context.entity(_drawNode.id);
-	        checkGeometry(true /* includeDrawNode */);
+	        return {
+	          type: 'text',
+	          raw: cap[0],
+	          text: text
+	        };
+	      }
 	    }
+	  }]);
 
+	  return Tokenizer;
+	}();
 
-	    // Check whether this edit causes the geometry to break.
-	    // If so, class the surface with a nope cursor.
-	    // `includeDrawNode` - Only check the relevant line segments if finishing drawing
-	    function checkGeometry(includeDrawNode) {
-	        var nopeDisabled = context.surface().classed('nope-disabled');
-	        var isInvalid = isInvalidGeometry(includeDrawNode);
+	var noopTest = helpers.noopTest,
+	    edit = helpers.edit,
+	    merge$1 = helpers.merge;
+	/**
+	 * Block-Level Grammar
+	 */
 
-	        if (nopeDisabled) {
-	            context.surface()
-	                .classed('nope', false)
-	                .classed('nope-suppressed', isInvalid);
-	        } else {
-	            context.surface()
-	                .classed('nope', isInvalid)
-	                .classed('nope-suppressed', false);
-	        }
-	    }
+	var block$1 = {
+	  newline: /^(?: *(?:\n|$))+/,
+	  code: /^( {4}[^\n]+(?:\n(?: *(?:\n|$))*)?)+/,
+	  fences: /^ {0,3}(`{3,}(?=[^`\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?:\n+|$)|$)/,
+	  hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,
+	  heading: /^ {0,3}(#{1,6})(?=\s|$)(.*)(?:\n+|$)/,
+	  blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
+	  list: /^( {0,3})(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?! {0,3}bull )\n*|\s*$)/,
+	  html: '^ {0,3}(?:' // optional indentation
+	  + '<(script|pre|style)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' // (1)
+	  + '|comment[^\\n]*(\\n+|$)' // (2)
+	  + '|<\\?[\\s\\S]*?(?:\\?>\\n*|$)' // (3)
+	  + '|<![A-Z][\\s\\S]*?(?:>\\n*|$)' // (4)
+	  + '|<!\\[CDATA\\[[\\s\\S]*?(?:\\]\\]>\\n*|$)' // (5)
+	  + '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (6)
+	  + '|<(?!script|pre|style)([a-z][\\w-]*)(?:attribute)*? */?>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (7) open tag
+	  + '|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (7) closing tag
+	  + ')',
+	  def: /^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,
+	  nptable: noopTest,
+	  table: noopTest,
+	  lheading: /^([^\n]+)\n {0,3}(=+|-+) *(?:\n+|$)/,
+	  // regex template, placeholders will be replaced according to different paragraph
+	  // interruption rules of commonmark and the original markdown spec:
+	  _paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list|html| +\n)[^\n]+)*)/,
+	  text: /^[^\n]+/
+	};
+	block$1._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/;
+	block$1._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
+	block$1.def = edit(block$1.def).replace('label', block$1._label).replace('title', block$1._title).getRegex();
+	block$1.bullet = /(?:[*+-]|\d{1,9}[.)])/;
+	block$1.item = /^( *)(bull) ?[^\n]*(?:\n(?! *bull ?)[^\n]*)*/;
+	block$1.item = edit(block$1.item, 'gm').replace(/bull/g, block$1.bullet).getRegex();
+	block$1.listItemStart = edit(/^( *)(bull) */).replace('bull', block$1.bullet).getRegex();
+	block$1.list = edit(block$1.list).replace(/bull/g, block$1.bullet).replace('hr', '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))').replace('def', '\\n+(?=' + block$1.def.source + ')').getRegex();
+	block$1._tag = 'address|article|aside|base|basefont|blockquote|body|caption' + '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption' + '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe' + '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option' + '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr' + '|track|ul';
+	block$1._comment = /<!--(?!-?>)[\s\S]*?(?:-->|$)/;
+	block$1.html = edit(block$1.html, 'i').replace('comment', block$1._comment).replace('tag', block$1._tag).replace('attribute', / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/).getRegex();
+	block$1.paragraph = edit(block$1._paragraph).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
+	.replace('blockquote', ' {0,3}>').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+	.replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // pars can be interrupted by type (6) html blocks
+	.getRegex();
+	block$1.blockquote = edit(block$1.blockquote).replace('paragraph', block$1.paragraph).getRegex();
+	/**
+	 * Normal Block Grammar
+	 */
 
+	block$1.normal = merge$1({}, block$1);
+	/**
+	 * GFM Block Grammar
+	 */
 
-	    function isInvalidGeometry(includeDrawNode) {
+	block$1.gfm = merge$1({}, block$1.normal, {
+	  nptable: '^ *([^|\\n ].*\\|.*)\\n' // Header
+	  + ' {0,3}([-:]+ *\\|[-| :]*)' // Align
+	  + '(?:\\n((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)',
+	  // Cells
+	  table: '^ *\\|(.+)\\n' // Header
+	  + ' {0,3}\\|?( *[-:]+[-| :]*)' // Align
+	  + '(?:\\n *((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)' // Cells
 
-	        var testNode = _drawNode;
+	});
+	block$1.gfm.nptable = edit(block$1.gfm.nptable).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+	.replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // tables can be interrupted by type (6) html blocks
+	.getRegex();
+	block$1.gfm.table = edit(block$1.gfm.table).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+	.replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // tables can be interrupted by type (6) html blocks
+	.getRegex();
+	/**
+	 * Pedantic grammar (original John Gruber's loose markdown specification)
+	 */
 
-	        // we only need to test the single way we're drawing
-	        var parentWay = context.graph().entity(wayID);
-	        var nodes = context.graph().childNodes(parentWay).slice();  // shallow copy
+	block$1.pedantic = merge$1({}, block$1.normal, {
+	  html: edit('^ *(?:comment *(?:\\n|\\s*$)' + '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
+	  + '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))').replace('comment', block$1._comment).replace(/tag/g, '(?!(?:' + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub' + '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)' + '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b').getRegex(),
+	  def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/,
+	  heading: /^(#{1,6})(.*)(?:\n+|$)/,
+	  fences: noopTest,
+	  // fences not supported
+	  paragraph: edit(block$1.normal._paragraph).replace('hr', block$1.hr).replace('heading', ' *#{1,6} *[^\n]').replace('lheading', block$1.lheading).replace('blockquote', ' {0,3}>').replace('|fences', '').replace('|list', '').replace('|html', '').getRegex()
+	});
+	/**
+	 * Inline-Level Grammar
+	 */
 
-	        if (includeDrawNode) {
-	            if (parentWay.isClosed()) {
-	                // don't test the last segment for closed ways - #4655
-	                // (still test the first segement)
-	                nodes.pop();
-	            }
-	        } else { // discount the draw node
+	var inline$1 = {
+	  escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
+	  autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
+	  url: noopTest,
+	  tag: '^comment' + '|^</[a-zA-Z][\\w:-]*\\s*>' // self-closing tag
+	  + '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' // open tag
+	  + '|^<\\?[\\s\\S]*?\\?>' // processing instruction, e.g. <?php ?>
+	  + '|^<![a-zA-Z]+\\s[\\s\\S]*?>' // declaration, e.g. <!DOCTYPE html>
+	  + '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>',
+	  // CDATA section
+	  link: /^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,
+	  reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
+	  nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
+	  reflinkSearch: 'reflink|nolink(?!\\()',
+	  emStrong: {
+	    lDelim: /^(?:\*+(?:([punct_])|[^\s*]))|^_+(?:([punct*])|([^\s_]))/,
+	    //        (1) and (2) can only be a Right Delimiter. (3) and (4) can only be Left.  (5) and (6) can be either Left or Right.
+	    //        () Skip other delimiter (1) #***                   (2) a***#, a***                   (3) #***a, ***a                 (4) ***#              (5) #***#                 (6) a***a
+	    rDelimAst: /\_\_[^_*]*?\*[^_*]*?\_\_|[punct_](\*+)(?=[\s]|$)|[^punct*_\s](\*+)(?=[punct_\s]|$)|[punct_\s](\*+)(?=[^punct*_\s])|[\s](\*+)(?=[punct_])|[punct_](\*+)(?=[punct_])|[^punct*_\s](\*+)(?=[^punct*_\s])/,
+	    rDelimUnd: /\*\*[^_*]*?\_[^_*]*?\*\*|[punct*](\_+)(?=[\s]|$)|[^punct*_\s](\_+)(?=[punct*\s]|$)|[punct*\s](\_+)(?=[^punct*_\s])|[\s](\_+)(?=[punct*])|[punct*](\_+)(?=[punct*])/ // ^- Not allowed for _
 
-	            if (parentWay.isClosed()) {
-	                if (nodes.length < 3) { return false; }
-	                if (_drawNode) { nodes.splice(-2, 1); }
-	                testNode = nodes[nodes.length - 2];
-	            } else {
-	                // there's nothing we need to test if we ignore the draw node on open ways
-	                return false;
-	            }
-	        }
+	  },
+	  code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
+	  br: /^( {2,}|\\)\n(?!\s*$)/,
+	  del: noopTest,
+	  text: /^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*_]|\b_|$)|[^ ](?= {2,}\n)))/,
+	  punctuation: /^([\spunctuation])/
+	}; // list of punctuation marks from CommonMark spec
+	// without * and _ to handle the different emphasis markers * and _
+
+	inline$1._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]`^{|}~';
+	inline$1.punctuation = edit(inline$1.punctuation).replace(/punctuation/g, inline$1._punctuation).getRegex(); // sequences em should skip over [title](link), `code`, <html>
+
+	inline$1.blockSkip = /\[[^\]]*?\]\([^\)]*?\)|`[^`]*?`|<[^>]*?>/g;
+	inline$1.escapedEmSt = /\\\*|\\_/g;
+	inline$1._comment = edit(block$1._comment).replace('(?:-->|$)', '-->').getRegex();
+	inline$1.emStrong.lDelim = edit(inline$1.emStrong.lDelim).replace(/punct/g, inline$1._punctuation).getRegex();
+	inline$1.emStrong.rDelimAst = edit(inline$1.emStrong.rDelimAst, 'g').replace(/punct/g, inline$1._punctuation).getRegex();
+	inline$1.emStrong.rDelimUnd = edit(inline$1.emStrong.rDelimUnd, 'g').replace(/punct/g, inline$1._punctuation).getRegex();
+	inline$1._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
+	inline$1._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;
+	inline$1._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;
+	inline$1.autolink = edit(inline$1.autolink).replace('scheme', inline$1._scheme).replace('email', inline$1._email).getRegex();
+	inline$1._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
+	inline$1.tag = edit(inline$1.tag).replace('comment', inline$1._comment).replace('attribute', inline$1._attribute).getRegex();
+	inline$1._label = /(?:\[(?:\\.|[^\[\]\\])*\]|\\.|`[^`]*`|[^\[\]\\`])*?/;
+	inline$1._href = /<(?:\\.|[^\n<>\\])+>|[^\s\x00-\x1f]*/;
+	inline$1._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
+	inline$1.link = edit(inline$1.link).replace('label', inline$1._label).replace('href', inline$1._href).replace('title', inline$1._title).getRegex();
+	inline$1.reflink = edit(inline$1.reflink).replace('label', inline$1._label).getRegex();
+	inline$1.reflinkSearch = edit(inline$1.reflinkSearch, 'g').replace('reflink', inline$1.reflink).replace('nolink', inline$1.nolink).getRegex();
+	/**
+	 * Normal Inline Grammar
+	 */
 
-	        return testNode && geoHasSelfIntersections(nodes, testNode.id);
-	    }
+	inline$1.normal = merge$1({}, inline$1);
+	/**
+	 * Pedantic Inline Grammar
+	 */
 
+	inline$1.pedantic = merge$1({}, inline$1.normal, {
+	  strong: {
+	    start: /^__|\*\*/,
+	    middle: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
+	    endAst: /\*\*(?!\*)/g,
+	    endUnd: /__(?!_)/g
+	  },
+	  em: {
+	    start: /^_|\*/,
+	    middle: /^()\*(?=\S)([\s\S]*?\S)\*(?!\*)|^_(?=\S)([\s\S]*?\S)_(?!_)/,
+	    endAst: /\*(?!\*)/g,
+	    endUnd: /_(?!_)/g
+	  },
+	  link: edit(/^!?\[(label)\]\((.*?)\)/).replace('label', inline$1._label).getRegex(),
+	  reflink: edit(/^!?\[(label)\]\s*\[([^\]]*)\]/).replace('label', inline$1._label).getRegex()
+	});
+	/**
+	 * GFM Inline Grammar
+	 */
 
-	    function undone() {
+	inline$1.gfm = merge$1({}, inline$1.normal, {
+	  escape: edit(inline$1.escape).replace('])', '~|])').getRegex(),
+	  _extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,
+	  url: /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,
+	  _backpedal: /(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,
+	  del: /^(~~?)(?=[^\s~])([\s\S]*?[^\s~])\1(?=[^~]|$)/,
+	  text: /^([`~]+|[^`~])(?:(?= {2,}\n)|(?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)|[\s\S]*?(?:(?=[\\<!\[`*~_]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)))/
+	});
+	inline$1.gfm.url = edit(inline$1.gfm.url, 'i').replace('email', inline$1.gfm._extended_email).getRegex();
+	/**
+	 * GFM + Line Breaks Inline Grammar
+	 */
 
-	        // undoing removed the temp edit
-	        _didResolveTempEdit = true;
+	inline$1.breaks = merge$1({}, inline$1.gfm, {
+	  br: edit(inline$1.br).replace('{2,}', '*').getRegex(),
+	  text: edit(inline$1.gfm.text).replace('\\b_', '\\b_| {2,}\\n').replace(/\{2,\}/g, '*').getRegex()
+	});
+	var rules = {
+	  block: block$1,
+	  inline: inline$1
+	};
 
-	        context.pauseChangeDispatch();
+	var Tokenizer$1 = Tokenizer_1;
+	var defaults$3 = defaults$5.exports.defaults;
+	var block = rules.block,
+	    inline = rules.inline;
+	var repeatString = helpers.repeatString;
+	/**
+	 * smartypants text replacement
+	 */
 
-	        var nextMode;
+	function smartypants(text) {
+	  return text // em-dashes
+	  .replace(/---/g, "\u2014") // en-dashes
+	  .replace(/--/g, "\u2013") // opening singles
+	  .replace(/(^|[-\u2014/(\[{"\s])'/g, "$1\u2018") // closing singles & apostrophes
+	  .replace(/'/g, "\u2019") // opening doubles
+	  .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, "$1\u201C") // closing doubles
+	  .replace(/"/g, "\u201D") // ellipses
+	  .replace(/\.{3}/g, "\u2026");
+	}
+	/**
+	 * mangle email addresses
+	 */
 
-	        if (context.graph() === startGraph) { // we've undone back to the beginning
-	            nextMode = modeSelect(context, [wayID]);
-	        } else {
-	            context.history()
-	                .on('undone.draw', null);
-	            // remove whatever segment was drawn previously
-	            context.undo();
 
-	            if (context.graph() === startGraph) { // we've undone back to the beginning
-	                nextMode = modeSelect(context, [wayID]);
-	            } else {
-	                // continue drawing
-	                nextMode = mode;
-	            }
-	        }
+	function mangle(text) {
+	  var out = '',
+	      i,
+	      ch;
+	  var l = text.length;
 
-	        // clear the redo stack by adding and removing an edit
-	        context.perform(actionNoop());
-	        context.pop(1);
+	  for (i = 0; i < l; i++) {
+	    ch = text.charCodeAt(i);
 
-	        context.resumeChangeDispatch();
-	        context.enter(nextMode);
+	    if (Math.random() > 0.5) {
+	      ch = 'x' + ch.toString(16);
 	    }
 
+	    out += '&#' + ch + ';';
+	  }
+
+	  return out;
+	}
+	/**
+	 * Block Lexer
+	 */
 
-	    function setActiveElements() {
-	        if (!_drawNode) { return; }
 
-	        context.surface().selectAll('.' + _drawNode.id)
-	            .classed('active', true);
-	    }
+	var Lexer_1 = /*#__PURE__*/function () {
+	  function Lexer(options) {
+	    _classCallCheck$1(this, Lexer);
 
+	    this.tokens = [];
+	    this.tokens.links = Object.create(null);
+	    this.options = options || defaults$3;
+	    this.options.tokenizer = this.options.tokenizer || new Tokenizer$1();
+	    this.tokenizer = this.options.tokenizer;
+	    this.tokenizer.options = this.options;
+	    var rules = {
+	      block: block.normal,
+	      inline: inline.normal
+	    };
 
-	    function resetToStartGraph() {
-	        while (context.graph() !== startGraph) {
-	            context.pop();
-	        }
+	    if (this.options.pedantic) {
+	      rules.block = block.pedantic;
+	      rules.inline = inline.pedantic;
+	    } else if (this.options.gfm) {
+	      rules.block = block.gfm;
+
+	      if (this.options.breaks) {
+	        rules.inline = inline.breaks;
+	      } else {
+	        rules.inline = inline.gfm;
+	      }
 	    }
 
+	    this.tokenizer.rules = rules;
+	  }
+	  /**
+	   * Expose Rules
+	   */
 
-	    var drawWay = function(surface) {
-	        _drawNode = undefined;
-	        _didResolveTempEdit = false;
-	        _origWay = context.entity(wayID);
-	        _headNodeID = typeof _nodeIndex === 'number' ? _origWay.nodes[_nodeIndex] :
-	            (_origWay.isClosed() ? _origWay.nodes[_origWay.nodes.length - 2] : _origWay.nodes[_origWay.nodes.length - 1]);
-	        _wayGeometry = _origWay.geometry(context.graph());
-	        _annotation = _t((_origWay.isDegenerate() ?
-	            'operations.start.annotation.' :
-	            'operations.continue.annotation.') + _wayGeometry
-	        );
-	        _pointerHasMoved = false;
-
-	        // Push an annotated state for undo to return back to.
-	        // We must make sure to replace or remove it later.
-	        context.pauseChangeDispatch();
-	        context.perform(actionNoop(), _annotation);
-	        context.resumeChangeDispatch();
-
-	        behavior.hover()
-	            .initialNodeID(_headNodeID);
-
-	        behavior
-	            .on('move', function() {
-	                _pointerHasMoved = true;
-	                move.apply(this, arguments);
-	            })
-	            .on('down', function() {
-	                move.apply(this, arguments);
-	            })
-	            .on('downcancel', function() {
-	                if (_drawNode) { removeDrawNode(); }
-	            })
-	            .on('click', drawWay.add)
-	            .on('clickWay', drawWay.addWay)
-	            .on('clickNode', drawWay.addNode)
-	            .on('undo', context.undo)
-	            .on('cancel', drawWay.cancel)
-	            .on('finish', drawWay.finish);
-
-	        select(window)
-	            .on('keydown.drawWay', keydown)
-	            .on('keyup.drawWay', keyup);
-
-	        context.map()
-	            .dblclickZoomEnable(false)
-	            .on('drawn.draw', setActiveElements);
-
-	        setActiveElements();
-
-	        surface.call(behavior);
-
-	        context.history()
-	            .on('undone.draw', undone);
-	    };
 
+	  _createClass$1(Lexer, [{
+	    key: "lex",
+	    value:
+	    /**
+	     * Preprocessing
+	     */
+	    function lex(src) {
+	      src = src.replace(/\r\n|\r/g, '\n').replace(/\t/g, '    ');
+	      this.blockTokens(src, this.tokens, true);
+	      this.inline(this.tokens);
+	      return this.tokens;
+	    }
+	    /**
+	     * Lexing
+	     */
 
-	    drawWay.off = function(surface) {
+	  }, {
+	    key: "blockTokens",
+	    value: function blockTokens(src) {
+	      var tokens = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
+	      var top = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;
 
-	        if (!_didResolveTempEdit) {
-	            // Drawing was interrupted unexpectedly.
-	            // This can happen if the user changes modes,
-	            // clicks geolocate button, a hashchange event occurs, etc.
+	      if (this.options.pedantic) {
+	        src = src.replace(/^ +$/gm, '');
+	      }
 
-	            context.pauseChangeDispatch();
-	            resetToStartGraph();
-	            context.resumeChangeDispatch();
-	        }
+	      var token, i, l, lastToken;
 
-	        _drawNode = undefined;
-	        _nodeIndex = undefined;
+	      while (src) {
+	        // newline
+	        if (token = this.tokenizer.space(src)) {
+	          src = src.substring(token.raw.length);
 
-	        context.map()
-	            .on('drawn.draw', null);
+	          if (token.type) {
+	            tokens.push(token);
+	          }
 
-	        surface.call(behavior.off)
-	            .selectAll('.active')
-	            .classed('active', false);
+	          continue;
+	        } // code
 
-	        surface
-	            .classed('nope', false)
-	            .classed('nope-suppressed', false)
-	            .classed('nope-disabled', false);
 
-	        select(window)
-	            .on('keydown.drawWay', null)
-	            .on('keyup.drawWay', null);
+	        if (token = this.tokenizer.code(src)) {
+	          src = src.substring(token.raw.length);
+	          lastToken = tokens[tokens.length - 1]; // An indented code block cannot interrupt a paragraph.
 
-	        context.history()
-	            .on('undone.draw', null);
-	    };
+	          if (lastToken && lastToken.type === 'paragraph') {
+	            lastToken.raw += '\n' + token.raw;
+	            lastToken.text += '\n' + token.text;
+	          } else {
+	            tokens.push(token);
+	          }
 
+	          continue;
+	        } // fences
 
-	    function attemptAdd(d, loc, doAdd) {
 
-	        if (_drawNode) {
-	            // move the node to the final loc in case move wasn't called
-	            // consistently (e.g. on touch devices)
-	            context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
-	            _drawNode = context.entity(_drawNode.id);
-	        } else {
-	            createDrawNode(loc);
-	        }
+	        if (token = this.tokenizer.fences(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // heading
 
-	        checkGeometry(true /* includeDrawNode */);
-	        if ((d && d.properties && d.properties.nope) || context.surface().classed('nope')) {
-	            if (!_pointerHasMoved) {
-	                // prevent the temporary draw node from appearing on touch devices
-	                removeDrawNode();
-	            }
-	            dispatch$1.call('rejectedSelfIntersection', this);
-	            return;   // can't click here
-	        }
 
-	        context.pauseChangeDispatch();
-	        doAdd();
-	        // we just replaced the temporary edit with the real one
-	        _didResolveTempEdit = true;
-	        context.resumeChangeDispatch();
+	        if (token = this.tokenizer.heading(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // table no leading pipe (gfm)
 
-	        context.enter(mode);
-	    }
 
+	        if (token = this.tokenizer.nptable(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // hr
 
-	    // Accept the current position of the drawing node
-	    drawWay.add = function(loc, d) {
-	        attemptAdd(d, loc, function() {
-	            // don't need to do anything extra
-	        });
-	    };
 
+	        if (token = this.tokenizer.hr(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // blockquote
 
-	    // Connect the way to an existing way
-	    drawWay.addWay = function(loc, edge, d) {
-	        attemptAdd(d, loc, function() {
-	            context.replace(
-	                actionAddMidpoint({ loc: loc, edge: edge }, _drawNode),
-	                _annotation
-	            );
-	        });
-	    };
 
+	        if (token = this.tokenizer.blockquote(src)) {
+	          src = src.substring(token.raw.length);
+	          token.tokens = this.blockTokens(token.text, [], top);
+	          tokens.push(token);
+	          continue;
+	        } // list
 
-	    // Connect the way to an existing node
-	    drawWay.addNode = function(node, d) {
 
-	        // finish drawing if the mapper targets the prior node
-	        if (node.id === _headNodeID ||
-	            // or the first node when drawing an area
-	            (_origWay.isClosed() && node.id === _origWay.first())) {
-	            drawWay.finish();
-	            return;
-	        }
+	        if (token = this.tokenizer.list(src)) {
+	          src = src.substring(token.raw.length);
+	          l = token.items.length;
 
-	        attemptAdd(d, node.loc, function() {
-	            context.replace(
-	                function actionReplaceDrawNode(graph) {
-	                    // remove the temporary draw node and insert the existing node
-	                    // at the same index
+	          for (i = 0; i < l; i++) {
+	            token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
+	          }
 
-	                    graph = graph
-	                        .replace(graph.entity(wayID).removeNode(_drawNode.id))
-	                        .remove(_drawNode);
-	                    return graph
-	                        .replace(graph.entity(wayID).addNode(node.id, _nodeIndex));
-	                },
-	                _annotation
-	            );
-	        });
-	    };
+	          tokens.push(token);
+	          continue;
+	        } // html
 
 
-	    // Finish the draw operation, removing the temporary edit.
-	    // If the way has enough nodes to be valid, it's selected.
-	    // Otherwise, delete everything and return to browse mode.
-	    drawWay.finish = function() {
-	        checkGeometry(false /* includeDrawNode */);
-	        if (context.surface().classed('nope')) {
-	            dispatch$1.call('rejectedSelfIntersection', this);
-	            return;   // can't click here
-	        }
+	        if (token = this.tokenizer.html(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // def
 
-	        context.pauseChangeDispatch();
-	        // remove the temporary edit
-	        context.pop(1);
-	        _didResolveTempEdit = true;
-	        context.resumeChangeDispatch();
 
-	        var way = context.hasEntity(wayID);
-	        if (!way || way.isDegenerate()) {
-	            drawWay.cancel();
-	            return;
-	        }
+	        if (top && (token = this.tokenizer.def(src))) {
+	          src = src.substring(token.raw.length);
 
-	        window.setTimeout(function() {
-	            context.map().dblclickZoomEnable(true);
-	        }, 1000);
+	          if (!this.tokens.links[token.tag]) {
+	            this.tokens.links[token.tag] = {
+	              href: token.href,
+	              title: token.title
+	            };
+	          }
 
-	        var isNewFeature = !mode.isContinuing;
-	        context.enter(modeSelect(context, [wayID]).newFeature(isNewFeature));
-	    };
+	          continue;
+	        } // table (gfm)
 
 
-	    // Cancel the draw operation, delete everything, and return to browse mode.
-	    drawWay.cancel = function() {
-	        context.pauseChangeDispatch();
-	        resetToStartGraph();
-	        context.resumeChangeDispatch();
+	        if (token = this.tokenizer.table(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // lheading
 
-	        window.setTimeout(function() {
-	            context.map().dblclickZoomEnable(true);
-	        }, 1000);
 
-	        context.surface()
-	            .classed('nope', false)
-	            .classed('nope-disabled', false)
-	            .classed('nope-suppressed', false);
+	        if (token = this.tokenizer.lheading(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // top-level paragraph
 
-	        context.enter(modeBrowse(context));
-	    };
 
+	        if (top && (token = this.tokenizer.paragraph(src))) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // text
 
-	    drawWay.nodeIndex = function(val) {
-	        if (!arguments.length) { return _nodeIndex; }
-	        _nodeIndex = val;
-	        return drawWay;
-	    };
 
+	        if (token = this.tokenizer.text(src)) {
+	          src = src.substring(token.raw.length);
+	          lastToken = tokens[tokens.length - 1];
 
-	    drawWay.activeID = function() {
-	        if (!arguments.length) { return _drawNode && _drawNode.id; }
-	        // no assign
-	        return drawWay;
-	    };
+	          if (lastToken && lastToken.type === 'text') {
+	            lastToken.raw += '\n' + token.raw;
+	            lastToken.text += '\n' + token.text;
+	          } else {
+	            tokens.push(token);
+	          }
 
+	          continue;
+	        }
 
-	    return utilRebind(drawWay, dispatch$1, 'on');
-	}
+	        if (src) {
+	          var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
 
-	function modeDrawLine(context, wayID, startGraph, button, affix, continuing) {
-	    var mode = {
-	        button: button,
-	        id: 'draw-line'
-	    };
+	          if (this.options.silent) {
+	            console.error(errMsg);
+	            break;
+	          } else {
+	            throw new Error(errMsg);
+	          }
+	        }
+	      }
 
-	    var behavior = behaviorDrawWay(context, wayID, mode, startGraph)
-	        .on('rejectedSelfIntersection.modeDrawLine', function() {
-	            context.ui().flash
-	                .text(_t('self_intersection.error.lines'))();
-	        });
+	      return tokens;
+	    }
+	  }, {
+	    key: "inline",
+	    value: function inline(tokens) {
+	      var i, j, k, l2, row, token;
+	      var l = tokens.length;
+
+	      for (i = 0; i < l; i++) {
+	        token = tokens[i];
+
+	        switch (token.type) {
+	          case 'paragraph':
+	          case 'text':
+	          case 'heading':
+	            {
+	              token.tokens = [];
+	              this.inlineTokens(token.text, token.tokens);
+	              break;
+	            }
 
-	    mode.wayID = wayID;
+	          case 'table':
+	            {
+	              token.tokens = {
+	                header: [],
+	                cells: []
+	              }; // header
 
-	    mode.isContinuing = continuing;
+	              l2 = token.header.length;
 
-	    mode.enter = function() {
-	        behavior
-	            .nodeIndex(affix === 'prefix' ? 0 : undefined);
+	              for (j = 0; j < l2; j++) {
+	                token.tokens.header[j] = [];
+	                this.inlineTokens(token.header[j], token.tokens.header[j]);
+	              } // cells
 
-	        context.install(behavior);
-	    };
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	              l2 = token.cells.length;
 
-	    mode.selectedIDs = function() {
-	        return [wayID];
-	    };
+	              for (j = 0; j < l2; j++) {
+	                row = token.cells[j];
+	                token.tokens.cells[j] = [];
 
-	    mode.activeID = function() {
-	        return (behavior && behavior.activeID()) || [];
-	    };
+	                for (k = 0; k < row.length; k++) {
+	                  token.tokens.cells[j][k] = [];
+	                  this.inlineTokens(row[k], token.tokens.cells[j][k]);
+	                }
+	              }
 
-	    return mode;
-	}
+	              break;
+	            }
 
-	function operationContinue(context, selectedIDs) {
-	    var graph = context.graph();
-	    var entities = selectedIDs.map(function(id) { return graph.entity(id); });
-	    var geometries = Object.assign(
-	        { line: [], vertex: [] },
-	        utilArrayGroupBy(entities, function(entity) { return entity.geometry(graph); })
-	    );
-	    var vertex = geometries.vertex[0];
+	          case 'blockquote':
+	            {
+	              this.inline(token.tokens);
+	              break;
+	            }
 
+	          case 'list':
+	            {
+	              l2 = token.items.length;
 
-	    function candidateWays() {
-	        return graph.parentWays(vertex).filter(function(parent) {
-	            return parent.geometry(graph) === 'line' &&
-	                !parent.isClosed() &&
-	                parent.affix(vertex.id) &&
-	                (geometries.line.length === 0 || geometries.line[0] === parent);
-	        });
-	    }
+	              for (j = 0; j < l2; j++) {
+	                this.inline(token.items[j].tokens);
+	              }
 
+	              break;
+	            }
+	        }
+	      }
 
-	    var operation = function() {
-	        var candidate = candidateWays()[0];
-	        context.enter(
-	            modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(vertex.id), true)
-	        );
-	    };
+	      return tokens;
+	    }
+	    /**
+	     * Lexing/Compiling
+	     */
 
+	  }, {
+	    key: "inlineTokens",
+	    value: function inlineTokens(src) {
+	      var tokens = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
+	      var inLink = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
+	      var inRawBlock = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;
+	      var token, lastToken; // String with links masked to avoid interference with em and strong
 
-	    operation.available = function() {
-	        return geometries.vertex.length === 1 &&
-	            geometries.line.length <= 1 &&
-	            !context.features().hasHiddenConnections(vertex, context.graph());
-	    };
+	      var maskedSrc = src;
+	      var match;
+	      var keepPrevChar, prevChar; // Mask out reflinks
 
+	      if (this.tokens.links) {
+	        var links = Object.keys(this.tokens.links);
 
-	    operation.disabled = function() {
-	        var candidates = candidateWays();
-	        if (candidates.length === 0) {
-	            return 'not_eligible';
-	        } else if (candidates.length > 1) {
-	            return 'multiple';
+	        if (links.length > 0) {
+	          while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {
+	            if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {
+	              maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
+	            }
+	          }
 	        }
+	      } // Mask out other blocks
 
-	        return false;
-	    };
 
+	      while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
+	        maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
+	      } // Mask out escaped em & strong delimiters
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.continue.' + disable) :
-	            _t('operations.continue.description');
-	    };
 
+	      while ((match = this.tokenizer.rules.inline.escapedEmSt.exec(maskedSrc)) != null) {
+	        maskedSrc = maskedSrc.slice(0, match.index) + '++' + maskedSrc.slice(this.tokenizer.rules.inline.escapedEmSt.lastIndex);
+	      }
+
+	      while (src) {
+	        if (!keepPrevChar) {
+	          prevChar = '';
+	        }
 
-	    operation.annotation = function() {
-	        return _t('operations.continue.annotation.line');
-	    };
+	        keepPrevChar = false; // escape
 
+	        if (token = this.tokenizer.escape(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // tag
 
-	    operation.id = 'continue';
-	    operation.keys = [_t('operations.continue.key')];
-	    operation.title = _t('operations.continue.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
 
-	    return operation;
-	}
+	        if (token = this.tokenizer.tag(src, inLink, inRawBlock)) {
+	          src = src.substring(token.raw.length);
+	          inLink = token.inLink;
+	          inRawBlock = token.inRawBlock;
+	          var _lastToken = tokens[tokens.length - 1];
 
-	function operationCopy(context, selectedIDs) {
+	          if (_lastToken && token.type === 'text' && _lastToken.type === 'text') {
+	            _lastToken.raw += token.raw;
+	            _lastToken.text += token.text;
+	          } else {
+	            tokens.push(token);
+	          }
 
-	    var _multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	          continue;
+	        } // link
 
-	    function getFilteredIdsToCopy() {
-	        return selectedIDs.filter(function(selectedID) {
-	            var entity = context.graph().hasEntity(selectedID);
-	            // don't copy untagged vertices separately from ways
-	            return entity.hasInterestingTags() || entity.geometry(context.graph()) !== 'vertex';
-	        });
-	    }
 
-	    var operation = function() {
+	        if (token = this.tokenizer.link(src)) {
+	          src = src.substring(token.raw.length);
 
-	        if (!getSelectionText()) {
-	            event.preventDefault();
-	        }
+	          if (token.type === 'link') {
+	            token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+	          }
 
-	        var graph = context.graph();
-	        var selected = groupEntities(getFilteredIdsToCopy(), graph);
-	        var canCopy = [];
-	        var skip = {};
-	        var entity;
-	        var i;
+	          tokens.push(token);
+	          continue;
+	        } // reflink, nolink
 
-	        for (i = 0; i < selected.relation.length; i++) {
-	            entity = selected.relation[i];
-	            if (!skip[entity.id] && entity.isComplete(graph)) {
-	                canCopy.push(entity.id);
-	                skip = getDescendants(entity.id, graph, skip);
-	            }
-	        }
-	        for (i = 0; i < selected.way.length; i++) {
-	            entity = selected.way[i];
-	            if (!skip[entity.id]) {
-	                canCopy.push(entity.id);
-	                skip = getDescendants(entity.id, graph, skip);
-	            }
-	        }
-	        for (i = 0; i < selected.node.length; i++) {
-	            entity = selected.node[i];
-	            if (!skip[entity.id]) {
-	                canCopy.push(entity.id);
-	            }
-	        }
 
-	        context.copyIDs(canCopy);
-	        if (_point &&
-	            (canCopy.length !== 1 || graph.entity(canCopy[0]).type !== 'node')) {
-	            // store the anchor coordinates if copying more than a single node
-	            context.copyLonLat(context.projection.invert(_point));
-	        } else {
-	            context.copyLonLat(null);
-	        }
+	        if (token = this.tokenizer.reflink(src, this.tokens.links)) {
+	          src = src.substring(token.raw.length);
+	          var _lastToken2 = tokens[tokens.length - 1];
 
-	    };
+	          if (token.type === 'link') {
+	            token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+	            tokens.push(token);
+	          } else if (_lastToken2 && token.type === 'text' && _lastToken2.type === 'text') {
+	            _lastToken2.raw += token.raw;
+	            _lastToken2.text += token.text;
+	          } else {
+	            tokens.push(token);
+	          }
 
+	          continue;
+	        } // em & strong
 
-	    function groupEntities(ids, graph) {
-	        var entities = ids.map(function (id) { return graph.entity(id); });
-	        return Object.assign(
-	            { relation: [], way: [], node: [] },
-	            utilArrayGroupBy(entities, 'type')
-	        );
-	    }
 
+	        if (token = this.tokenizer.emStrong(src, maskedSrc, prevChar)) {
+	          src = src.substring(token.raw.length);
+	          token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
+	          tokens.push(token);
+	          continue;
+	        } // code
 
-	    function getDescendants(id, graph, descendants) {
-	        var entity = graph.entity(id);
-	        var children;
 
-	        descendants = descendants || {};
+	        if (token = this.tokenizer.codespan(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // br
 
-	        if (entity.type === 'relation') {
-	            children = entity.members.map(function(m) { return m.id; });
-	        } else if (entity.type === 'way') {
-	            children = entity.nodes;
-	        } else {
-	            children = [];
-	        }
 
-	        for (var i = 0; i < children.length; i++) {
-	            if (!descendants[children[i]]) {
-	                descendants[children[i]] = true;
-	                descendants = getDescendants(children[i], graph, descendants);
-	            }
-	        }
+	        if (token = this.tokenizer.br(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // del (gfm)
 
-	        return descendants;
-	    }
 
+	        if (token = this.tokenizer.del(src)) {
+	          src = src.substring(token.raw.length);
+	          token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
+	          tokens.push(token);
+	          continue;
+	        } // autolink
 
-	    function getSelectionText() {
-	        return window.getSelection().toString();
-	    }
 
+	        if (token = this.tokenizer.autolink(src, mangle)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // url (gfm)
 
-	    operation.available = function() {
-	        return getFilteredIdsToCopy().length > 0;
-	    };
 
+	        if (!inLink && (token = this.tokenizer.url(src, mangle))) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // text
 
-	    operation.disabled = function() {
-	        var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        }
-	        return false;
-	    };
 
+	        if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
+	          src = src.substring(token.raw.length);
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.copy.' + disable + '.' + _multi) :
-	            _t('operations.copy.description' + '.' + _multi);
-	    };
+	          if (token.raw.slice(-1) !== '_') {
+	            // Track prevChar before string of ____ started
+	            prevChar = token.raw.slice(-1);
+	          }
 
+	          keepPrevChar = true;
+	          lastToken = tokens[tokens.length - 1];
 
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.copy.annotation.single') :
-	            _t('operations.copy.annotation.multiple', { n: selectedIDs.length.toString() });
-	    };
+	          if (lastToken && lastToken.type === 'text') {
+	            lastToken.raw += token.raw;
+	            lastToken.text += token.text;
+	          } else {
+	            tokens.push(token);
+	          }
 
+	          continue;
+	        }
 
-	    var _point;
-	    operation.point = function(val) {
-	        _point = val;
-	        return operation;
-	    };
+	        if (src) {
+	          var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
 
+	          if (this.options.silent) {
+	            console.error(errMsg);
+	            break;
+	          } else {
+	            throw new Error(errMsg);
+	          }
+	        }
+	      }
 
-	    operation.id = 'copy';
-	    operation.keys = [uiCmd('⌘C')];
-	    operation.title = _t('operations.copy.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	      return tokens;
+	    }
+	  }], [{
+	    key: "rules",
+	    get: function get() {
+	      return {
+	        block: block,
+	        inline: inline
+	      };
+	    }
+	    /**
+	     * Static Lex Method
+	     */
 
-	    return operation;
-	}
+	  }, {
+	    key: "lex",
+	    value: function lex(src, options) {
+	      var lexer = new Lexer(options);
+	      return lexer.lex(src);
+	    }
+	    /**
+	     * Static Lex Inline Method
+	     */
 
-	function operationDisconnect(context, selectedIDs) {
-	    var _vertexIDs = [];
-	    var _wayIDs = [];
-	    var _otherIDs = [];
-	    var _actions = [];
+	  }, {
+	    key: "lexInline",
+	    value: function lexInline(src, options) {
+	      var lexer = new Lexer(options);
+	      return lexer.inlineTokens(src);
+	    }
+	  }]);
 
-	    selectedIDs.forEach(function(id) {
-	        var entity = context.entity(id);
-	        if (entity.type === 'way'){
-	            _wayIDs.push(id);
-	        } else if (entity.geometry(context.graph()) === 'vertex') {
-	            _vertexIDs.push(id);
-	        } else {
-	            _otherIDs.push(id);
-	        }
-	    });
+	  return Lexer;
+	}();
 
-	    var _extent, _nodes, _coords, _descriptionID = '', _annotationID = 'features';
+	var defaults$2 = defaults$5.exports.defaults;
+	var cleanUrl = helpers.cleanUrl,
+	    escape$2 = helpers.escape;
+	/**
+	 * Renderer
+	 */
 
-	    if (_vertexIDs.length > 0) {
-	        // At the selected vertices, disconnect the selected ways, if any, else
-	        // disconnect all connected ways
+	var Renderer_1 = /*#__PURE__*/function () {
+	  function Renderer(options) {
+	    _classCallCheck$1(this, Renderer);
 
-	        _extent = utilTotalExtent(_vertexIDs, context.graph());
+	    this.options = options || defaults$2;
+	  }
 
-	        _vertexIDs.forEach(function(vertexID) {
-	            var action = actionDisconnect(vertexID);
+	  _createClass$1(Renderer, [{
+	    key: "code",
+	    value: function code(_code, infostring, escaped) {
+	      var lang = (infostring || '').match(/\S*/)[0];
 
-	            if (_wayIDs.length > 0) {
-	                var waysIDsForVertex = _wayIDs.filter(function(wayID) {
-	                    var way = context.entity(wayID);
-	                    return way.nodes.indexOf(vertexID) !== -1;
-	                });
-	                action.limitWays(waysIDsForVertex);
-	            }
-	            _actions.push(action);
-	        });
+	      if (this.options.highlight) {
+	        var out = this.options.highlight(_code, lang);
 
-	        _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';
-	        if (_wayIDs.length === 1) {
-	            _descriptionID += 'single_way.' + context.graph().geometry(_wayIDs[0]);
-	        } else {
-	            _descriptionID += _wayIDs.length === 0 ? 'no_ways' : 'multiple_ways';
+	        if (out != null && out !== _code) {
+	          escaped = true;
+	          _code = out;
 	        }
+	      }
 
-	    } else if (_wayIDs.length > 0) {
-	        // Disconnect the selected ways from each other, if they're connected,
-	        // else disconnect them from all connected ways
+	      _code = _code.replace(/\n$/, '') + '\n';
 
-	        var ways = _wayIDs.map(function(id) {
-	            return context.entity(id);
-	        });
-	        _nodes = utilGetAllNodes(_wayIDs, context.graph());
-	        _coords = _nodes.map(function(n) { return n.loc; });
-	        _extent = utilTotalExtent(ways, context.graph());
-
-	        // actions for connected nodes shared by at least two selected ways
-	        var sharedActions = [];
-	        // actions for connected nodes
-	        var unsharedActions = [];
-
-	        _nodes.forEach(function(node) {
-	            var action = actionDisconnect(node.id).limitWays(_wayIDs);
-	            if (action.disabled(context.graph()) !== 'not_connected') {
-
-	                var count = 0;
-	                for (var i in ways) {
-	                    var way = ways[i];
-	                    if (way.nodes.indexOf(node.id) !== -1) {
-	                        count += 1;
-	                    }
-	                    if (count > 1) { break; }
-	                }
+	      if (!lang) {
+	        return '<pre><code>' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
+	      }
 
-	                if (count > 1) {
-	                    sharedActions.push(action);
-	                } else {
-	                    unsharedActions.push(action);
-	                }
-	            }
-	        });
+	      return '<pre><code class="' + this.options.langPrefix + escape$2(lang, true) + '">' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
+	    }
+	  }, {
+	    key: "blockquote",
+	    value: function blockquote(quote) {
+	      return '<blockquote>\n' + quote + '</blockquote>\n';
+	    }
+	  }, {
+	    key: "html",
+	    value: function html(_html) {
+	      return _html;
+	    }
+	  }, {
+	    key: "heading",
+	    value: function heading(text, level, raw, slugger) {
+	      if (this.options.headerIds) {
+	        return '<h' + level + ' id="' + this.options.headerPrefix + slugger.slug(raw) + '">' + text + '</h' + level + '>\n';
+	      } // ignore IDs
 
-	        _descriptionID += 'no_points.';
-	        _descriptionID += _wayIDs.length === 1 ? 'single_way.' : 'multiple_ways.';
 
-	        if (sharedActions.length) {
-	            // if any nodes are shared, only disconnect the selected ways from each other
-	            _actions = sharedActions;
-	            _descriptionID += 'conjoined';
-	            _annotationID = 'from_each_other';
-	        } else {
-	            // if no nodes are shared, disconnect the selected ways from all connected ways
-	            _actions = unsharedActions;
-	            if (_wayIDs.length === 1) {
-	                _descriptionID += context.graph().geometry(_wayIDs[0]);
-	            } else {
-	                _descriptionID += 'separate';
-	            }
-	        }
+	      return '<h' + level + '>' + text + '</h' + level + '>\n';
+	    }
+	  }, {
+	    key: "hr",
+	    value: function hr() {
+	      return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
+	    }
+	  }, {
+	    key: "list",
+	    value: function list(body, ordered, start) {
+	      var type = ordered ? 'ol' : 'ul',
+	          startatt = ordered && start !== 1 ? ' start="' + start + '"' : '';
+	      return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
+	    }
+	  }, {
+	    key: "listitem",
+	    value: function listitem(text) {
+	      return '<li>' + text + '</li>\n';
+	    }
+	  }, {
+	    key: "checkbox",
+	    value: function checkbox(checked) {
+	      return '<input ' + (checked ? 'checked="" ' : '') + 'disabled="" type="checkbox"' + (this.options.xhtml ? ' /' : '') + '> ';
+	    }
+	  }, {
+	    key: "paragraph",
+	    value: function paragraph(text) {
+	      return '<p>' + text + '</p>\n';
+	    }
+	  }, {
+	    key: "table",
+	    value: function table(header, body) {
+	      if (body) body = '<tbody>' + body + '</tbody>';
+	      return '<table>\n' + '<thead>\n' + header + '</thead>\n' + body + '</table>\n';
+	    }
+	  }, {
+	    key: "tablerow",
+	    value: function tablerow(content) {
+	      return '<tr>\n' + content + '</tr>\n';
 	    }
+	  }, {
+	    key: "tablecell",
+	    value: function tablecell(content, flags) {
+	      var type = flags.header ? 'th' : 'td';
+	      var tag = flags.align ? '<' + type + ' align="' + flags.align + '">' : '<' + type + '>';
+	      return tag + content + '</' + type + '>\n';
+	    } // span level renderer
 
+	  }, {
+	    key: "strong",
+	    value: function strong(text) {
+	      return '<strong>' + text + '</strong>';
+	    }
+	  }, {
+	    key: "em",
+	    value: function em(text) {
+	      return '<em>' + text + '</em>';
+	    }
+	  }, {
+	    key: "codespan",
+	    value: function codespan(text) {
+	      return '<code>' + text + '</code>';
+	    }
+	  }, {
+	    key: "br",
+	    value: function br() {
+	      return this.options.xhtml ? '<br/>' : '<br>';
+	    }
+	  }, {
+	    key: "del",
+	    value: function del(text) {
+	      return '<del>' + text + '</del>';
+	    }
+	  }, {
+	    key: "link",
+	    value: function link(href, title, text) {
+	      href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
 
-	    var operation = function() {
-	        context.perform(function(graph) {
-	            return _actions.reduce(function(graph, action) { return action(graph); }, graph);
-	        }, operation.annotation());
-
-	        context.validator().validate();
-	    };
-
-
-	    operation.available = function() {
-	        if (_actions.length === 0) { return false; }
-	        if (_otherIDs.length !== 0) { return false; }
+	      if (href === null) {
+	        return text;
+	      }
 
-	        if (_vertexIDs.length !== 0 && _wayIDs.length !== 0 && !_wayIDs.every(function(wayID) {
-	            return _vertexIDs.some(function(vertexID) {
-	                var way = context.entity(wayID);
-	                return way.nodes.indexOf(vertexID) !== -1;
-	            });
-	        })) { return false; }
+	      var out = '<a href="' + escape$2(href) + '"';
 
-	        return true;
-	    };
+	      if (title) {
+	        out += ' title="' + title + '"';
+	      }
 
+	      out += '>' + text + '</a>';
+	      return out;
+	    }
+	  }, {
+	    key: "image",
+	    value: function image(href, title, text) {
+	      href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
 
-	    operation.disabled = function() {
-	        var reason;
-	        for (var actionIndex in _actions) {
-	            reason = _actions[actionIndex].disabled(context.graph());
-	            if (reason) { return reason; }
-	        }
+	      if (href === null) {
+	        return text;
+	      }
 
-	        if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large.' + ((_vertexIDs.length ? _vertexIDs : _wayIDs).length === 1 ? 'single' : 'multiple');
-	        } else if (_coords && someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        }
+	      var out = '<img src="' + href + '" alt="' + text + '"';
 
-	        return false;
+	      if (title) {
+	        out += ' title="' + title + '"';
+	      }
 
+	      out += this.options.xhtml ? '/>' : '>';
+	      return out;
+	    }
+	  }, {
+	    key: "text",
+	    value: function text(_text) {
+	      return _text;
+	    }
+	  }]);
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
-	    };
+	  return Renderer;
+	}();
 
+	var TextRenderer_1 = /*#__PURE__*/function () {
+	  function TextRenderer() {
+	    _classCallCheck$1(this, TextRenderer);
+	  }
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        if (disable) {
-	            return _t('operations.disconnect.' + disable);
-	        }
-	        return _t('operations.disconnect.description.' + _descriptionID);
-	    };
+	  _createClass$1(TextRenderer, [{
+	    key: "strong",
+	    value: // no need for block level renderers
+	    function strong(text) {
+	      return text;
+	    }
+	  }, {
+	    key: "em",
+	    value: function em(text) {
+	      return text;
+	    }
+	  }, {
+	    key: "codespan",
+	    value: function codespan(text) {
+	      return text;
+	    }
+	  }, {
+	    key: "del",
+	    value: function del(text) {
+	      return text;
+	    }
+	  }, {
+	    key: "html",
+	    value: function html(text) {
+	      return text;
+	    }
+	  }, {
+	    key: "text",
+	    value: function text(_text) {
+	      return _text;
+	    }
+	  }, {
+	    key: "link",
+	    value: function link(href, title, text) {
+	      return '' + text;
+	    }
+	  }, {
+	    key: "image",
+	    value: function image(href, title, text) {
+	      return '' + text;
+	    }
+	  }, {
+	    key: "br",
+	    value: function br() {
+	      return '';
+	    }
+	  }]);
 
+	  return TextRenderer;
+	}();
 
-	    operation.annotation = function() {
-	        return _t('operations.disconnect.annotation.' + _annotationID);
-	    };
+	var Slugger_1 = /*#__PURE__*/function () {
+	  function Slugger() {
+	    _classCallCheck$1(this, Slugger);
 
+	    this.seen = {};
+	  }
 
-	    operation.id = 'disconnect';
-	    operation.keys = [_t('operations.disconnect.key')];
-	    operation.title = _t('operations.disconnect.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	  _createClass$1(Slugger, [{
+	    key: "serialize",
+	    value: function serialize(value) {
+	      return value.toLowerCase().trim() // remove html tags
+	      .replace(/<[!\/a-z].*?>/ig, '') // remove unwanted chars
+	      .replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g, '').replace(/\s/g, '-');
+	    }
+	    /**
+	     * Finds the next safe (unique) slug to use
+	     */
 
-	    return operation;
-	}
+	  }, {
+	    key: "getNextSafeSlug",
+	    value: function getNextSafeSlug(originalSlug, isDryRun) {
+	      var slug = originalSlug;
+	      var occurenceAccumulator = 0;
 
-	function operationDowngrade(context, selectedIDs) {
-	    var affectedFeatureCount = 0;
-	    var downgradeType;
+	      if (this.seen.hasOwnProperty(slug)) {
+	        occurenceAccumulator = this.seen[originalSlug];
 
-	    setDowngradeTypeForEntityIDs();
+	        do {
+	          occurenceAccumulator++;
+	          slug = originalSlug + '-' + occurenceAccumulator;
+	        } while (this.seen.hasOwnProperty(slug));
+	      }
 
-	    var multi = affectedFeatureCount === 1 ? 'single' : 'multiple';
+	      if (!isDryRun) {
+	        this.seen[originalSlug] = occurenceAccumulator;
+	        this.seen[slug] = 0;
+	      }
 
-	    function setDowngradeTypeForEntityIDs() {
-	        for (var i in selectedIDs) {
-	            var entityID = selectedIDs[i];
-	            var type = downgradeTypeForEntityID(entityID);
-	            if (type) {
-	                affectedFeatureCount += 1;
-	                if (downgradeType && type !== downgradeType) {
-	                    downgradeType = 'building_address';
-	                } else {
-	                    downgradeType = type;
-	                }
-	            }
-	        }
+	      return slug;
 	    }
+	    /**
+	     * Convert string to unique id
+	     * @param {object} options
+	     * @param {boolean} options.dryrun Generates the next unique slug without updating the internal accumulator.
+	     */
 
-	    function downgradeTypeForEntityID(entityID) {
-	        var graph = context.graph();
-	        var entity = graph.entity(entityID);
-	        var preset = _mainPresetIndex.match(entity, graph);
-
-	        if (!preset || preset.isFallback()) { return null; }
-
-	        if (entity.type === 'node' &&
-	            preset.id !== 'address' &&
-	            Object.keys(entity.tags).some(function(key) {
-	                return key.match(/^addr:.{1,}/);
-	            })) {
+	  }, {
+	    key: "slug",
+	    value: function slug(value) {
+	      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+	      var slug = this.serialize(value);
+	      return this.getNextSafeSlug(slug, options.dryrun);
+	    }
+	  }]);
 
-	            return 'address';
-	        }
-	        if (entity.geometry(graph) === 'area' &&
-	            entity.tags.building &&
-	            !preset.tags.building) {
+	  return Slugger;
+	}();
 
-	            return 'building';
-	        }
+	var Renderer$1 = Renderer_1;
+	var TextRenderer$1 = TextRenderer_1;
+	var Slugger$1 = Slugger_1;
+	var defaults$1 = defaults$5.exports.defaults;
+	var unescape$1 = helpers.unescape;
+	/**
+	 * Parsing & Compiling
+	 */
 
-	        return null;
-	    }
+	var Parser_1 = /*#__PURE__*/function () {
+	  function Parser(options) {
+	    _classCallCheck$1(this, Parser);
 
-	    var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
-	    var addressKeysToKeep = ['source'];
+	    this.options = options || defaults$1;
+	    this.options.renderer = this.options.renderer || new Renderer$1();
+	    this.renderer = this.options.renderer;
+	    this.renderer.options = this.options;
+	    this.textRenderer = new TextRenderer$1();
+	    this.slugger = new Slugger$1();
+	  }
+	  /**
+	   * Static Parse Method
+	   */
 
-	    var operation = function () {
-	        context.perform(function(graph) {
 
-	            for (var i in selectedIDs) {
-	                var entityID = selectedIDs[i];
-	                var type = downgradeTypeForEntityID(entityID);
-	                if (!type) { continue; }
+	  _createClass$1(Parser, [{
+	    key: "parse",
+	    value:
+	    /**
+	     * Parse Loop
+	     */
+	    function parse(tokens) {
+	      var top = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;
+	      var out = '',
+	          i,
+	          j,
+	          k,
+	          l2,
+	          l3,
+	          row,
+	          cell,
+	          header,
+	          body,
+	          token,
+	          ordered,
+	          start,
+	          loose,
+	          itemBody,
+	          item,
+	          checked,
+	          task,
+	          checkbox;
+	      var l = tokens.length;
+
+	      for (i = 0; i < l; i++) {
+	        token = tokens[i];
+
+	        switch (token.type) {
+	          case 'space':
+	            {
+	              continue;
+	            }
 
-	                var tags = Object.assign({}, graph.entity(entityID).tags);  // shallow copy
-	                for (var key in tags) {
-	                    if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) { continue; }
-	                    if (type === 'building') {
-	                        if (buildingKeysToKeep.indexOf(key) !== -1 ||
-	                            key.match(/^building:.{1,}/) ||
-	                            key.match(/^roof:.{1,}/)) { continue; }
-	                    }
-	                    // keep address tags for buildings too
-	                    if (key.match(/^addr:.{1,}/)) { continue; }
+	          case 'hr':
+	            {
+	              out += this.renderer.hr();
+	              continue;
+	            }
 
-	                    delete tags[key];
-	                }
-	                graph = actionChangeTags(entityID, tags)(graph);
+	          case 'heading':
+	            {
+	              out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape$1(this.parseInline(token.tokens, this.textRenderer)), this.slugger);
+	              continue;
 	            }
-	            return graph;
-	        }, operation.annotation());
 
-	        context.validator().validate();
+	          case 'code':
+	            {
+	              out += this.renderer.code(token.text, token.lang, token.escaped);
+	              continue;
+	            }
 
-	        // refresh the select mode to enable the delete operation
-	        context.enter(modeSelect(context, selectedIDs));
-	    };
+	          case 'table':
+	            {
+	              header = ''; // header
 
+	              cell = '';
+	              l2 = token.header.length;
 
-	    operation.available = function () {
-	        return downgradeType;
-	    };
+	              for (j = 0; j < l2; j++) {
+	                cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {
+	                  header: true,
+	                  align: token.align[j]
+	                });
+	              }
 
+	              header += this.renderer.tablerow(cell);
+	              body = '';
+	              l2 = token.cells.length;
 
-	    operation.disabled = function () {
-	        if (selectedIDs.some(hasWikidataTag)) {
-	            return 'has_wikidata_tag';
-	        }
-	        return false;
+	              for (j = 0; j < l2; j++) {
+	                row = token.tokens.cells[j];
+	                cell = '';
+	                l3 = row.length;
 
-	        function hasWikidataTag(id) {
-	            var entity = context.entity(id);
-	            return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-	        }
-	    };
+	                for (k = 0; k < l3; k++) {
+	                  cell += this.renderer.tablecell(this.parseInline(row[k]), {
+	                    header: false,
+	                    align: token.align[k]
+	                  });
+	                }
 
+	                body += this.renderer.tablerow(cell);
+	              }
 
-	    operation.tooltip = function () {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.downgrade.' + disable + '.' + multi) :
-	            _t('operations.downgrade.description.' + downgradeType);
-	    };
+	              out += this.renderer.table(header, body);
+	              continue;
+	            }
 
+	          case 'blockquote':
+	            {
+	              body = this.parse(token.tokens);
+	              out += this.renderer.blockquote(body);
+	              continue;
+	            }
 
-	    operation.annotation = function () {
-	        var suffix;
-	        if (downgradeType === 'building_address') {
-	            suffix = 'multiple';
-	        } else {
-	            suffix = downgradeType + '.' + multi;
-	        }
-	        return _t('operations.downgrade.annotation.' + suffix, { n: affectedFeatureCount});
-	    };
+	          case 'list':
+	            {
+	              ordered = token.ordered;
+	              start = token.start;
+	              loose = token.loose;
+	              l2 = token.items.length;
+	              body = '';
+
+	              for (j = 0; j < l2; j++) {
+	                item = token.items[j];
+	                checked = item.checked;
+	                task = item.task;
+	                itemBody = '';
+
+	                if (item.task) {
+	                  checkbox = this.renderer.checkbox(checked);
+
+	                  if (loose) {
+	                    if (item.tokens.length > 0 && item.tokens[0].type === 'text') {
+	                      item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
+
+	                      if (item.tokens[0].tokens && item.tokens[0].tokens.length > 0 && item.tokens[0].tokens[0].type === 'text') {
+	                        item.tokens[0].tokens[0].text = checkbox + ' ' + item.tokens[0].tokens[0].text;
+	                      }
+	                    } else {
+	                      item.tokens.unshift({
+	                        type: 'text',
+	                        text: checkbox
+	                      });
+	                    }
+	                  } else {
+	                    itemBody += checkbox;
+	                  }
+	                }
 
+	                itemBody += this.parse(item.tokens, loose);
+	                body += this.renderer.listitem(itemBody, task, checked);
+	              }
 
-	    operation.id = 'downgrade';
-	    operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
-	    operation.title = _t('operations.downgrade.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	              out += this.renderer.list(body, ordered, start);
+	              continue;
+	            }
 
+	          case 'html':
+	            {
+	              // TODO parse inline content if parameter markdown=1
+	              out += this.renderer.html(token.text);
+	              continue;
+	            }
 
-	    return operation;
-	}
+	          case 'paragraph':
+	            {
+	              out += this.renderer.paragraph(this.parseInline(token.tokens));
+	              continue;
+	            }
 
-	function operationExtract(context, selectedIDs) {
+	          case 'text':
+	            {
+	              body = token.tokens ? this.parseInline(token.tokens) : token.text;
 
-	    var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
-	    var _geometries = utilArrayUniq(selectedIDs.map(function(entityID) {
-	        return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
-	    }).filter(Boolean));
-	    var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
+	              while (i + 1 < l && tokens[i + 1].type === 'text') {
+	                token = tokens[++i];
+	                body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
+	              }
 
-	    var _extent;
-	    var _actions = selectedIDs.map(function(entityID) {
-	        var graph = context.graph();
-	        var entity = graph.hasEntity(entityID);
-	        if (!entity || !entity.hasInterestingTags()) { return; }
+	              out += top ? this.renderer.paragraph(body) : body;
+	              continue;
+	            }
 
-	        if (entity.type === 'node' && graph.parentWays(entity).length === 0) { return; }
+	          default:
+	            {
+	              var errMsg = 'Token with "' + token.type + '" type was not found.';
 
-	        if (entity.type !== 'node') {
-	            var preset = _mainPresetIndex.match(entity, graph);
-	            // only allow extraction from ways/relations if the preset supports points
-	            if (preset.geometry.indexOf('point') === -1) { return; }
+	              if (this.options.silent) {
+	                console.error(errMsg);
+	                return;
+	              } else {
+	                throw new Error(errMsg);
+	              }
+	            }
 	        }
+	      }
 
-	        _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
+	      return out;
+	    }
+	    /**
+	     * Parse Inline Tokens
+	     */
 
-	        return actionExtract(entityID);
-	    }).filter(Boolean);
+	  }, {
+	    key: "parseInline",
+	    value: function parseInline(tokens, renderer) {
+	      renderer = renderer || this.renderer;
+	      var out = '',
+	          i,
+	          token;
+	      var l = tokens.length;
+
+	      for (i = 0; i < l; i++) {
+	        token = tokens[i];
+
+	        switch (token.type) {
+	          case 'escape':
+	            {
+	              out += renderer.text(token.text);
+	              break;
+	            }
 
+	          case 'html':
+	            {
+	              out += renderer.html(token.text);
+	              break;
+	            }
 
-	    var operation = function () {
-	        var combinedAction = function(graph) {
-	            _actions.forEach(function(action) {
-	                graph = action(graph);
-	            });
-	            return graph;
-	        };
-	        context.perform(combinedAction, operation.annotation());  // do the extract
+	          case 'link':
+	            {
+	              out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	        var extractedNodeIDs = _actions.map(function(action) {
-	            return action.getExtractedNodeID();
-	        });
-	        context.enter(modeSelect(context, extractedNodeIDs));
-	    };
+	          case 'image':
+	            {
+	              out += renderer.image(token.href, token.title, token.text);
+	              break;
+	            }
 
+	          case 'strong':
+	            {
+	              out += renderer.strong(this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	    operation.available = function () {
-	        return _actions.length && selectedIDs.length === _actions.length;
-	    };
+	          case 'em':
+	            {
+	              out += renderer.em(this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
+	          case 'codespan':
+	            {
+	              out += renderer.codespan(token.text);
+	              break;
+	            }
 
-	    operation.disabled = function () {
+	          case 'br':
+	            {
+	              out += renderer.br();
+	              break;
+	            }
 
-	        if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (selectedIDs.some(function(entityID) {
-	            return context.graph().geometry(entityID) === 'vertex' && context.hasHiddenConnections(entityID);
-	        })) {
-	            return 'connected_to_hidden';
-	        }
+	          case 'del':
+	            {
+	              out += renderer.del(this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	        return false;
-	    };
+	          case 'text':
+	            {
+	              out += renderer.text(token.text);
+	              break;
+	            }
 
+	          default:
+	            {
+	              var errMsg = 'Token with "' + token.type + '" type was not found.';
 
-	    operation.tooltip = function () {
-	        var disableReason = operation.disabled();
-	        if (disableReason) {
-	            return _t('operations.extract.' + disableReason + '.' + _amount);
-	        } else {
-	            return _t('operations.extract.description.' + _geometryID + '.' + _amount);
+	              if (this.options.silent) {
+	                console.error(errMsg);
+	                return;
+	              } else {
+	                throw new Error(errMsg);
+	              }
+	            }
 	        }
-	    };
+	      }
 
+	      return out;
+	    }
+	  }], [{
+	    key: "parse",
+	    value: function parse(tokens, options) {
+	      var parser = new Parser(options);
+	      return parser.parse(tokens);
+	    }
+	    /**
+	     * Static Parse Inline Method
+	     */
 
-	    operation.annotation = function () {
-	        return _t('operations.extract.annotation.' + _amount, { n: selectedIDs.length });
-	    };
+	  }, {
+	    key: "parseInline",
+	    value: function parseInline(tokens, options) {
+	      var parser = new Parser(options);
+	      return parser.parseInline(tokens);
+	    }
+	  }]);
 
+	  return Parser;
+	}();
+
+	var Lexer = Lexer_1;
+	var Parser = Parser_1;
+	var Tokenizer = Tokenizer_1;
+	var Renderer = Renderer_1;
+	var TextRenderer = TextRenderer_1;
+	var Slugger = Slugger_1;
+	var merge = helpers.merge,
+	    checkSanitizeDeprecation = helpers.checkSanitizeDeprecation,
+	    escape$1 = helpers.escape;
+	var getDefaults = defaults$5.exports.getDefaults,
+	    changeDefaults = defaults$5.exports.changeDefaults,
+	    defaults = defaults$5.exports.defaults;
+	/**
+	 * Marked
+	 */
 
-	    operation.id = 'extract';
-	    operation.keys = [_t('operations.extract.key')];
-	    operation.title = _t('operations.extract.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	function marked(src, opt, callback) {
+	  // throw error in case of non string input
+	  if (typeof src === 'undefined' || src === null) {
+	    throw new Error('marked(): input parameter is undefined or null');
+	  }
 
+	  if (typeof src !== 'string') {
+	    throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+	  }
 
-	    return operation;
-	}
+	  if (typeof opt === 'function') {
+	    callback = opt;
+	    opt = null;
+	  }
 
-	function operationMerge(context, selectedIDs) {
+	  opt = merge({}, marked.defaults, opt || {});
+	  checkSanitizeDeprecation(opt);
 
-	    var _action = getAction();
+	  if (callback) {
+	    var highlight = opt.highlight;
+	    var tokens;
 
-	    function getAction() {
-	        // prefer a non-disabled action first
-	        var join = actionJoin(selectedIDs);
-	        if (!join.disabled(context.graph())) { return join; }
+	    try {
+	      tokens = Lexer.lex(src, opt);
+	    } catch (e) {
+	      return callback(e);
+	    }
 
-	        var merge = actionMerge(selectedIDs);
-	        if (!merge.disabled(context.graph())) { return merge; }
+	    var done = function done(err) {
+	      var out;
 
-	        var mergePolygon = actionMergePolygon(selectedIDs);
-	        if (!mergePolygon.disabled(context.graph())) { return mergePolygon; }
+	      if (!err) {
+	        try {
+	          if (opt.walkTokens) {
+	            marked.walkTokens(tokens, opt.walkTokens);
+	          }
 
-	        var mergeNodes = actionMergeNodes(selectedIDs);
-	        if (!mergeNodes.disabled(context.graph())) { return mergeNodes; }
+	          out = Parser.parse(tokens, opt);
+	        } catch (e) {
+	          err = e;
+	        }
+	      }
 
-	        // otherwise prefer an action with an interesting disabled reason
-	        if (join.disabled(context.graph()) !== 'not_eligible') { return join; }
-	        if (merge.disabled(context.graph()) !== 'not_eligible') { return merge; }
-	        if (mergePolygon.disabled(context.graph()) !== 'not_eligible') { return mergePolygon; }
+	      opt.highlight = highlight;
+	      return err ? callback(err) : callback(null, out);
+	    };
 
-	        return mergeNodes;
+	    if (!highlight || highlight.length < 3) {
+	      return done();
 	    }
 
-	    var operation = function() {
-
-	        if (operation.disabled()) { return; }
-
-	        context.perform(_action, operation.annotation());
+	    delete opt.highlight;
+	    if (!tokens.length) return done();
+	    var pending = 0;
+	    marked.walkTokens(tokens, function (token) {
+	      if (token.type === 'code') {
+	        pending++;
+	        setTimeout(function () {
+	          highlight(token.text, token.lang, function (err, code) {
+	            if (err) {
+	              return done(err);
+	            }
 
-	        context.validator().validate();
+	            if (code != null && code !== token.text) {
+	              token.text = code;
+	              token.escaped = true;
+	            }
 
-	        var resultIDs = selectedIDs.filter(context.hasEntity);
-	        if (resultIDs.length > 1) {
-	            var interestingIDs = resultIDs.filter(function(id) {
-	                return context.entity(id).hasInterestingTags();
-	            });
-	            if (interestingIDs.length) { resultIDs = interestingIDs; }
-	        }
-	        context.enter(modeSelect(context, resultIDs));
-	    };
+	            pending--;
 
-	    operation.available = function() {
-	        return selectedIDs.length >= 2;
-	    };
+	            if (pending === 0) {
+	              done();
+	            }
+	          });
+	        }, 0);
+	      }
+	    });
 
-	    operation.disabled = function() {
-	        var actionDisabled = _action.disabled(context.graph());
-	        if (actionDisabled) { return actionDisabled; }
+	    if (pending === 0) {
+	      done();
+	    }
 
-	        var osm = context.connection();
-	        if (osm &&
-	            _action.resultingWayNodesLength &&
-	            _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
-	            return 'too_many_vertices';
-	        }
+	    return;
+	  }
 
-	        return false;
-	    };
+	  try {
+	    var _tokens = Lexer.lex(src, opt);
 
-	    operation.tooltip = function() {
-	        var disabled = operation.disabled();
-	        if (disabled) {
-	            if (disabled === 'restriction') {
-	                return _t('operations.merge.restriction',
-	                    { relation: _mainPresetIndex.item('type/restriction').name() });
-	            }
-	            return _t('operations.merge.' + disabled);
-	        }
-	        return _t('operations.merge.description');
-	    };
+	    if (opt.walkTokens) {
+	      marked.walkTokens(_tokens, opt.walkTokens);
+	    }
 
-	    operation.annotation = function() {
-	        return _t('operations.merge.annotation', { n: selectedIDs.length });
-	    };
+	    return Parser.parse(_tokens, opt);
+	  } catch (e) {
+	    e.message += '\nPlease report this to https://github.com/markedjs/marked.';
 
-	    operation.id = 'merge';
-	    operation.keys = [_t('operations.merge.key')];
-	    operation.title = _t('operations.merge.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	    if (opt.silent) {
+	      return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
+	    }
 
-	    return operation;
+	    throw e;
+	  }
 	}
+	/**
+	 * Options
+	 */
 
-	// see also `behaviorPaste`
-	function operationPaste(context) {
 
-	    var _pastePoint;
+	marked.options = marked.setOptions = function (opt) {
+	  merge(marked.defaults, opt);
+	  changeDefaults(marked.defaults);
+	  return marked;
+	};
 
-	    var operation = function() {
+	marked.getDefaults = getDefaults;
+	marked.defaults = defaults;
+	/**
+	 * Use Extension
+	 */
 
-	        if (!_pastePoint) { return; }
+	marked.use = function (extension) {
+	  var opts = merge({}, extension);
 
-	        var oldIDs = context.copyIDs();
-	        if (!oldIDs.length) { return; }
+	  if (extension.renderer) {
+	    (function () {
+	      var renderer = marked.defaults.renderer || new Renderer();
 
-	        var projection = context.projection;
-	        var extent = geoExtent();
-	        var oldGraph = context.copyGraph();
-	        var newIDs = [];
+	      var _loop = function _loop(prop) {
+	        var prevRenderer = renderer[prop];
 
-	        var action = actionCopyEntities(oldIDs, oldGraph);
-	        context.perform(action);
+	        renderer[prop] = function () {
+	          for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+	            args[_key] = arguments[_key];
+	          }
 
-	        var copies = action.copies();
-	        var originals = new Set();
-	        Object.values(copies).forEach(function(entity) { originals.add(entity.id); });
+	          var ret = extension.renderer[prop].apply(renderer, args);
 
-	        for (var id in copies) {
-	            var oldEntity = oldGraph.entity(id);
-	            var newEntity = copies[id];
+	          if (ret === false) {
+	            ret = prevRenderer.apply(renderer, args);
+	          }
 
-	            extent._extend(oldEntity.extent(oldGraph));
+	          return ret;
+	        };
+	      };
 
-	            // Exclude child nodes from newIDs if their parent way was also copied.
-	            var parents = context.graph().parentWays(newEntity);
-	            var parentCopied = parents.some(function(parent) {
-	                return originals.has(parent.id);
-	            });
+	      for (var prop in extension.renderer) {
+	        _loop(prop);
+	      }
 
-	            if (!parentCopied) {
-	                newIDs.push(newEntity.id);
-	            }
-	        }
+	      opts.renderer = renderer;
+	    })();
+	  }
 
-	        // Use the location of the copy operation to offset the paste location,
-	        // or else use the center of the pasted extent
-	        var copyPoint = (context.copyLonLat() && projection(context.copyLonLat())) ||
-	            projection(extent.center());
-	        var delta = geoVecSubtract(_pastePoint, copyPoint);
+	  if (extension.tokenizer) {
+	    (function () {
+	      var tokenizer = marked.defaults.tokenizer || new Tokenizer();
 
-	        // Move the pasted objects to be anchored at the paste location
-	        context.replace(actionMove(newIDs, delta, projection), operation.annotation());
-	        context.enter(modeSelect(context, newIDs));
-	    };
+	      var _loop2 = function _loop2(prop) {
+	        var prevTokenizer = tokenizer[prop];
 
-	    operation.point = function(val) {
-	        _pastePoint = val;
-	        return operation;
-	    };
+	        tokenizer[prop] = function () {
+	          for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+	            args[_key2] = arguments[_key2];
+	          }
 
-	    operation.available = function() {
-	        return context.mode().id === 'browse';
-	    };
+	          var ret = extension.tokenizer[prop].apply(tokenizer, args);
 
-	    operation.disabled = function() {
-	        return !context.copyIDs().length;
-	    };
+	          if (ret === false) {
+	            ret = prevTokenizer.apply(tokenizer, args);
+	          }
 
-	    operation.tooltip = function() {
-	        var oldGraph = context.copyGraph();
-	        var ids = context.copyIDs();
-	        if (!ids.length) {
-	            return _t('operations.paste.nothing_copied');
-	        }
-	        return ids.length === 1 ?
-	            _t('operations.paste.description.single', { feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph) }) :
-	            _t('operations.paste.description.multiple', { n: ids.length.toString() });
-	    };
+	          return ret;
+	        };
+	      };
 
-	    operation.annotation = function() {
-	        var ids = context.copyIDs();
-	        return ids.length === 1 ?
-	            _t('operations.paste.annotation.single') :
-	            _t('operations.paste.annotation.multiple', { n: ids.length.toString() });
-	    };
+	      for (var prop in extension.tokenizer) {
+	        _loop2(prop);
+	      }
 
-	    operation.id = 'paste';
-	    operation.keys = [uiCmd('⌘V')];
-	    operation.title = _t('operations.paste.title');
+	      opts.tokenizer = tokenizer;
+	    })();
+	  }
 
-	    return operation;
-	}
+	  if (extension.walkTokens) {
+	    var walkTokens = marked.defaults.walkTokens;
 
-	function operationReverse(context, selectedIDs) {
+	    opts.walkTokens = function (token) {
+	      extension.walkTokens(token);
 
-	    var operation = function() {
-	        context.perform(function combinedReverseAction(graph) {
-	            actions().forEach(function(action) {
-	                graph = action(graph);
-	            });
-	            return graph;
-	        }, operation.annotation());
-	        context.validator().validate();
+	      if (walkTokens) {
+	        walkTokens(token);
+	      }
 	    };
+	  }
 
-	    function actions(situation) {
-	        return selectedIDs.map(function(entityID) {
-	            var entity = context.hasEntity(entityID);
-	            if (!entity) { return; }
+	  marked.setOptions(opts);
+	};
+	/**
+	 * Run callback for every token
+	 */
 
-	            if (situation === 'toolbar') {
-	                if (entity.type === 'way' &&
-	                    (!entity.isOneWay() && !entity.isSided())) { return; }
-	            }
 
-	            var geometry = entity.geometry(context.graph());
-	            if (entity.type !== 'node' && geometry !== 'line') { return; }
+	marked.walkTokens = function (tokens, callback) {
+	  var _iterator = _createForOfIteratorHelper(tokens),
+	      _step;
 
-	            var action = actionReverse(entityID);
-	            if (action.disabled(context.graph())) { return; }
+	  try {
+	    for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	      var token = _step.value;
+	      callback(token);
 
-	            return action;
-	        }).filter(Boolean);
-	    }
+	      switch (token.type) {
+	        case 'table':
+	          {
+	            var _iterator2 = _createForOfIteratorHelper(token.tokens.header),
+	                _step2;
 
-	    function reverseTypeID() {
-	        var acts = actions();
-	        var nodeActionCount = acts.filter(function(act) {
-	            var entity = context.hasEntity(act.entityID());
-	            return entity && entity.type === 'node';
-	        }).length;
-	        var typeID = nodeActionCount === 0 ? 'line' : (nodeActionCount === acts.length ? 'point' : 'features');
-	        if (typeID !== 'features' && acts.length > 1) { typeID += 's'; }
-	        return typeID;
-	    }
+	            try {
+	              for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+	                var cell = _step2.value;
+	                marked.walkTokens(cell, callback);
+	              }
+	            } catch (err) {
+	              _iterator2.e(err);
+	            } finally {
+	              _iterator2.f();
+	            }
 
+	            var _iterator3 = _createForOfIteratorHelper(token.tokens.cells),
+	                _step3;
 
-	    operation.available = function(situation) {
-	        return actions(situation).length > 0;
-	    };
+	            try {
+	              for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
+	                var row = _step3.value;
 
+	                var _iterator4 = _createForOfIteratorHelper(row),
+	                    _step4;
 
-	    operation.disabled = function() {
-	        return false;
-	    };
+	                try {
+	                  for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {
+	                    var _cell = _step4.value;
+	                    marked.walkTokens(_cell, callback);
+	                  }
+	                } catch (err) {
+	                  _iterator4.e(err);
+	                } finally {
+	                  _iterator4.f();
+	                }
+	              }
+	            } catch (err) {
+	              _iterator3.e(err);
+	            } finally {
+	              _iterator3.f();
+	            }
 
+	            break;
+	          }
 
-	    operation.tooltip = function() {
-	        return _t('operations.reverse.description.' + reverseTypeID());
-	    };
+	        case 'list':
+	          {
+	            marked.walkTokens(token.items, callback);
+	            break;
+	          }
 
+	        default:
+	          {
+	            if (token.tokens) {
+	              marked.walkTokens(token.tokens, callback);
+	            }
+	          }
+	      }
+	    }
+	  } catch (err) {
+	    _iterator.e(err);
+	  } finally {
+	    _iterator.f();
+	  }
+	};
+	/**
+	 * Parse Inline
+	 */
 
-	    operation.annotation = function() {
-	        return _t('operations.reverse.annotation.' + reverseTypeID());
-	    };
 
+	marked.parseInline = function (src, opt) {
+	  // throw error in case of non string input
+	  if (typeof src === 'undefined' || src === null) {
+	    throw new Error('marked.parseInline(): input parameter is undefined or null');
+	  }
 
-	    operation.id = 'reverse';
-	    operation.keys = [_t('operations.reverse.key')];
-	    operation.title = _t('operations.reverse.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	  if (typeof src !== 'string') {
+	    throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+	  }
 
-	    return operation;
-	}
+	  opt = merge({}, marked.defaults, opt || {});
+	  checkSanitizeDeprecation(opt);
 
-	function operationSplit(context, selectedIDs) {
-	    var vertices = selectedIDs
-	        .filter(function(id) { return context.graph().geometry(id) === 'vertex'; });
-	    var entityID = vertices[0];
-	    var action = actionSplit(entityID);
-	    var ways = [];
+	  try {
+	    var tokens = Lexer.lexInline(src, opt);
 
-	    if (vertices.length === 1) {
-	        if (entityID && selectedIDs.length > 1) {
-	            var ids = selectedIDs.filter(function(id) { return id !== entityID; });
-	            action.limitWays(ids);
-	        }
-	        ways = action.ways(context.graph());
+	    if (opt.walkTokens) {
+	      marked.walkTokens(tokens, opt.walkTokens);
 	    }
 
+	    return Parser.parseInline(tokens, opt);
+	  } catch (e) {
+	    e.message += '\nPlease report this to https://github.com/markedjs/marked.';
 
-	    var operation = function() {
-	        var difference = context.perform(action, operation.annotation());
-	        context.enter(modeSelect(context, difference.extantIDs()));
-	    };
+	    if (opt.silent) {
+	      return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
+	    }
 
+	    throw e;
+	  }
+	};
+	/**
+	 * Expose
+	 */
 
-	    operation.available = function() {
-	        return vertices.length === 1;
-	    };
 
+	marked.Parser = Parser;
+	marked.parser = Parser.parse;
+	marked.Renderer = Renderer;
+	marked.TextRenderer = TextRenderer;
+	marked.Lexer = Lexer;
+	marked.lexer = Lexer.lex;
+	marked.Tokenizer = Tokenizer;
+	marked.Slugger = Slugger;
+	marked.parse = marked;
+	var marked_1 = marked;
 
-	    operation.disabled = function() {
-	        var reason = action.disabled(context.graph());
-	        if (reason) {
-	            return reason;
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        }
+	var tiler$4 = utilTiler();
+	var dispatch$5 = dispatch$8('loaded');
+	var _tileZoom$1 = 14;
+	var _osmoseUrlRoot = 'https://osmose.openstreetmap.fr/api/0.3';
+	var _osmoseData = {
+	  icons: {},
+	  items: []
+	}; // This gets reassigned if reset
 
-	        return false;
-	    };
+	var _cache;
 
+	function abortRequest$4(controller) {
+	  if (controller) {
+	    controller.abort();
+	  }
+	}
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        if (disable) {
-	            return _t('operations.split.' + disable);
-	        } else if (ways.length === 1) {
-	            return _t('operations.split.description.' + context.graph().geometry(ways[0].id));
-	        } else {
-	            return _t('operations.split.description.multiple');
-	        }
-	    };
+	function abortUnwantedRequests$1(cache, tiles) {
+	  Object.keys(cache.inflightTile).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k === tile.id;
+	    });
 
+	    if (!wanted) {
+	      abortRequest$4(cache.inflightTile[k]);
+	      delete cache.inflightTile[k];
+	    }
+	  });
+	}
 
-	    operation.annotation = function() {
-	        return ways.length === 1 ?
-	            _t('operations.split.annotation.' + context.graph().geometry(ways[0].id)) :
-	            _t('operations.split.annotation.multiple', { n: ways.length });
-	    };
+	function encodeIssueRtree(d) {
+	  return {
+	    minX: d.loc[0],
+	    minY: d.loc[1],
+	    maxX: d.loc[0],
+	    maxY: d.loc[1],
+	    data: d
+	  };
+	} // Replace or remove QAItem from rtree
 
 
-	    operation.id = 'split';
-	    operation.keys = [_t('operations.split.key')];
-	    operation.title = _t('operations.split.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	function updateRtree$1(item, replace) {
+	  _cache.rtree.remove(item, function (a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
-	    return operation;
-	}
+	  if (replace) {
+	    _cache.rtree.insert(item);
+	  }
+	} // Issues shouldn't obscure each other
 
-	function operationStraighten(context, selectedIDs) {
-	    var _wayIDs = selectedIDs.filter(function(id) { return id.charAt(0) === 'w'; });
-	    var _nodeIDs = selectedIDs.filter(function(id) { return id.charAt(0) === 'n'; });
-	    var _amount = ((_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple');
-
-	    var _nodes = utilGetAllNodes(selectedIDs, context.graph());
-	    var _coords = _nodes.map(function(n) { return n.loc; });
-	    var _extent = utilTotalExtent(selectedIDs, context.graph());
-	    var _action = chooseAction();
-	    var _geometry;
-
-
-	    function chooseAction() {
-	        // straighten selected nodes
-	        if (_wayIDs.length === 0 && _nodeIDs.length > 2) {
-	            _geometry = 'points';
-	            return actionStraightenNodes(_nodeIDs, context.projection);
-
-	        // straighten selected ways (possibly between range of 2 selected nodes)
-	        } else if (_wayIDs.length > 0 && (_nodeIDs.length === 0 || _nodeIDs.length === 2)) {
-	            var startNodeIDs = [];
-	            var endNodeIDs = [];
-
-	            for (var i = 0; i < selectedIDs.length; i++) {
-	                var entity = context.entity(selectedIDs[i]);
-	                if (entity.type === 'node') {
-	                    continue;
-	                } else if (entity.type !== 'way' || entity.isClosed()) {
-	                    return null;  // exit early, can't straighten these
-	                }
 
-	                startNodeIDs.push(entity.first());
-	                endNodeIDs.push(entity.last());
-	            }
+	function preventCoincident(loc) {
+	  var coincident = false;
 
-	            // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
-	            startNodeIDs = startNodeIDs.filter(function(n) {
-	                return startNodeIDs.indexOf(n) === startNodeIDs.lastIndexOf(n);
-	            });
-	            endNodeIDs = endNodeIDs.filter(function(n) {
-	                return endNodeIDs.indexOf(n) === endNodeIDs.lastIndexOf(n);
-	            });
+	  do {
+	    // first time, move marker up. after that, move marker right.
+	    var delta = coincident ? [0.00001, 0] : [0, 0.00001];
+	    loc = geoVecAdd(loc, delta);
+	    var bbox = geoExtent(loc).bbox();
+	    coincident = _cache.rtree.search(bbox).length;
+	  } while (coincident);
 
-	            // Ensure all ways are connected (i.e. only 2 unique endpoints/startpoints)
-	            if (utilArrayDifference(startNodeIDs, endNodeIDs).length +
-	                utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) { return null; }
+	  return loc;
+	}
 
-	            // Ensure path contains at least 3 unique nodes
-	            var wayNodeIDs = utilGetAllNodes(_wayIDs, context.graph())
-	                .map(function(node) { return node.id; });
-	            if (wayNodeIDs.length <= 2) { return null; }
+	var serviceOsmose = {
+	  title: 'osmose',
+	  init: function init() {
+	    _mainFileFetcher.get('qa_data').then(function (d) {
+	      _osmoseData = d.osmose;
+	      _osmoseData.items = Object.keys(d.osmose.icons).map(function (s) {
+	        return s.split('-')[0];
+	      }).reduce(function (unique, item) {
+	        return unique.indexOf(item) !== -1 ? unique : [].concat(_toConsumableArray(unique), [item]);
+	      }, []);
+	    });
 
-	            // If range of 2 selected nodes is supplied, ensure nodes lie on the selected path
-	            if (_nodeIDs.length === 2 && (
-	                wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1
-	            )) { return null; }
+	    if (!_cache) {
+	      this.reset();
+	    }
 
-	            if (_nodeIDs.length) {
-	                // If we're only straightenting between two points, we only need that extent visible
-	                _extent = utilTotalExtent(_nodeIDs, context.graph());
-	            }
+	    this.event = utilRebind(this, dispatch$5, 'on');
+	  },
+	  reset: function reset() {
+	    var _strings = {};
+	    var _colors = {};
 
-	            _geometry = _wayIDs.length === 1 ? 'line' : 'lines';
-	            return actionStraightenWay(selectedIDs, context.projection);
-	        }
+	    if (_cache) {
+	      Object.values(_cache.inflightTile).forEach(abortRequest$4); // Strings and colors are static and should not be re-populated
 
-	        return null;
+	      _strings = _cache.strings;
+	      _colors = _cache.colors;
 	    }
 
+	    _cache = {
+	      data: {},
+	      loadedTile: {},
+	      inflightTile: {},
+	      inflightPost: {},
+	      closed: {},
+	      rtree: new RBush(),
+	      strings: _strings,
+	      colors: _colors
+	    };
+	  },
+	  loadIssues: function loadIssues(projection) {
+	    var _this = this;
 
-	    function operation() {
-	        if (!_action) { return; }
-
-	        context.perform(_action, operation.annotation());
-
-	        window.setTimeout(function() {
-	            context.validator().validate();
-	        }, 300);  // after any transition
-	    }
+	    var params = {
+	      // Tiles return a maximum # of issues
+	      // So we want to filter our request for only types iD supports
+	      item: _osmoseData.items
+	    }; // determine the needed tiles to cover the view
 
+	    var tiles = tiler$4.zoomExtent([_tileZoom$1, _tileZoom$1]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	    operation.available = function() {
-	        return Boolean(_action);
-	    };
+	    abortUnwantedRequests$1(_cache, tiles); // issue new requests..
 
+	    tiles.forEach(function (tile) {
+	      if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) return;
 
-	    operation.disabled = function() {
-	        var reason = _action.disabled(context.graph());
-	        if (reason) {
-	            return reason;
-	        } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        }
+	      var _tile$xyz = _slicedToArray(tile.xyz, 3),
+	          x = _tile$xyz[0],
+	          y = _tile$xyz[1],
+	          z = _tile$xyz[2];
 
-	        return false;
+	      var url = "".concat(_osmoseUrlRoot, "/issues/").concat(z, "/").concat(x, "/").concat(y, ".json?") + utilQsString(params);
+	      var controller = new AbortController();
+	      _cache.inflightTile[tile.id] = controller;
+	      d3_json(url, {
+	        signal: controller.signal
+	      }).then(function (data) {
+	        delete _cache.inflightTile[tile.id];
+	        _cache.loadedTile[tile.id] = true;
+
+	        if (data.features) {
+	          data.features.forEach(function (issue) {
+	            var _issue$properties = issue.properties,
+	                item = _issue$properties.item,
+	                cl = _issue$properties["class"],
+	                id = _issue$properties.uuid;
+	            /* Osmose issues are uniquely identified by a unique
+	              `item` and `class` combination (both integer values) */
+
+	            var itemType = "".concat(item, "-").concat(cl); // Filter out unsupported issue types (some are too specific or advanced)
+
+	            if (itemType in _osmoseData.icons) {
+	              var loc = issue.geometry.coordinates; // lon, lat
+
+	              loc = preventCoincident(loc);
+	              var d = new QAItem(loc, _this, itemType, id, {
+	                item: item
+	              }); // Setting elems here prevents UI detail requests
+
+	              if (item === 8300 || item === 8360) {
+	                d.elems = [];
+	              }
 
+	              _cache.data[d.id] = d;
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
+	              _cache.rtree.insert(encodeIssueRtree(d));
 	            }
-	            return false;
+	          });
 	        }
-	    };
 
+	        dispatch$5.call('loaded');
+	      })["catch"](function () {
+	        delete _cache.inflightTile[tile.id];
+	        _cache.loadedTile[tile.id] = true;
+	      });
+	    });
+	  },
+	  loadIssueDetail: function loadIssueDetail(issue) {
+	    var _this2 = this;
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.straighten.' + disable + '.' + _amount) :
-	            _t('operations.straighten.description.' + _geometry);
-	    };
+	    // Issue details only need to be fetched once
+	    if (issue.elems !== undefined) {
+	      return Promise.resolve(issue);
+	    }
+
+	    var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "?langs=").concat(_mainLocalizer.localeCode());
 
+	    var cacheDetails = function cacheDetails(data) {
+	      // Associated elements used for highlighting
+	      // Assign directly for immediate use in the callback
+	      issue.elems = data.elems.map(function (e) {
+	        return e.type.substring(0, 1) + e.id;
+	      }); // Some issues have instance specific detail in a subtitle
+
+	      issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';
 
-	    operation.annotation = function() {
-	        return _t('operations.straighten.annotation.' + _geometry);
+	      _this2.replaceItem(issue);
 	    };
 
+	    return d3_json(url).then(cacheDetails).then(function () {
+	      return issue;
+	    });
+	  },
+	  loadStrings: function loadStrings() {
+	    var locale = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : _mainLocalizer.localeCode();
+	    var items = Object.keys(_osmoseData.icons);
 
-	    operation.id = 'straighten';
-	    operation.keys = [_t('operations.straighten.key')];
-	    operation.title = _t('operations.straighten.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
-
-	    return operation;
-	}
+	    if (locale in _cache.strings && Object.keys(_cache.strings[locale]).length === items.length) {
+	      return Promise.resolve(_cache.strings[locale]);
+	    } // May be partially populated already if some requests were successful
 
-	var Operations = /*#__PURE__*/Object.freeze({
-		__proto__: null,
-		operationCircularize: operationCircularize,
-		operationContinue: operationContinue,
-		operationCopy: operationCopy,
-		operationDelete: operationDelete,
-		operationDisconnect: operationDisconnect,
-		operationDowngrade: operationDowngrade,
-		operationExtract: operationExtract,
-		operationMerge: operationMerge,
-		operationMove: operationMove,
-		operationOrthogonalize: operationOrthogonalize,
-		operationPaste: operationPaste,
-		operationReflectShort: operationReflectShort,
-		operationReflectLong: operationReflectLong,
-		operationReverse: operationReverse,
-		operationRotate: operationRotate,
-		operationSplit: operationSplit,
-		operationStraighten: operationStraighten
-	});
 
-	var _relatedParent;
+	    if (!(locale in _cache.strings)) {
+	      _cache.strings[locale] = {};
+	    } // Only need to cache strings for supported issue types
+	    // Using multiple individual item + class requests to reduce fetched data size
 
 
-	function modeSelect(context, selectedIDs) {
-	    var mode = {
-	        id: 'select',
-	        button: 'browse'
-	    };
+	    var allRequests = items.map(function (itemType) {
+	      // No need to request data we already have
+	      if (itemType in _cache.strings[locale]) return null;
 
-	    var keybinding = utilKeybinding('select');
+	      var cacheData = function cacheData(data) {
+	        // Bunch of nested single value arrays of objects
+	        var _data$categories = _slicedToArray(data.categories, 1),
+	            _data$categories$ = _data$categories[0],
+	            cat = _data$categories$ === void 0 ? {
+	          items: []
+	        } : _data$categories$;
 
-	    var _breatheBehavior = behaviorBreathe();
-	    var _modeDragNode = modeDragNode(context);
-	    var _selectBehavior;
-	    var _behaviors = [];
+	        var _cat$items = _slicedToArray(cat.items, 1),
+	            _cat$items$ = _cat$items[0],
+	            item = _cat$items$ === void 0 ? {
+	          "class": []
+	        } : _cat$items$;
 
-	    var _operations = [];
-	    var _newFeature = false;
-	    var _follow = false;
+	        var _item$class = _slicedToArray(item["class"], 1),
+	            _item$class$ = _item$class[0],
+	            cl = _item$class$ === void 0 ? null : _item$class$; // If null default value is reached, data wasn't as expected (or was empty)
 
 
-	    function singular() {
-	        if (selectedIDs && selectedIDs.length === 1) {
-	            return context.hasEntity(selectedIDs[0]);
-	        }
-	    }
+	        if (!cl) {
+	          /* eslint-disable no-console */
+	          console.log("Osmose strings request (".concat(itemType, ") had unexpected data"));
+	          /* eslint-enable no-console */
 
-	    function selectedEntities() {
-	        return selectedIDs.map(function(id) {
-	            return context.hasEntity(id);
-	        }).filter(Boolean);
-	    }
+	          return;
+	        } // Cache served item colors to automatically style issue markers later
 
 
-	    function checkSelectedIDs() {
-	        var ids = [];
-	        if (Array.isArray(selectedIDs)) {
-	            ids = selectedIDs.filter(function(id) {
-	                return context.hasEntity(id);
-	            });
-	        }
+	        var itemInt = item.item,
+	            color = item.color;
 
-	        if (!ids.length) {
-	            context.enter(modeBrowse(context));
-	            return false;
-	        } else if ((selectedIDs.length > 1 && ids.length === 1) ||
-	            (selectedIDs.length === 1 && ids.length > 1)) {
-	            // switch between single- and multi-select UI
-	            context.enter(modeSelect(context, ids));
-	            return false;
-	        }
+	        if (/^#[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/.test(color)) {
+	          _cache.colors[itemInt] = color;
+	        } // Value of root key will be null if no string exists
+	        // If string exists, value is an object with key 'auto' for string
 
-	        selectedIDs = ids;
-	        return true;
-	    }
 
+	        var title = cl.title,
+	            detail = cl.detail,
+	            fix = cl.fix,
+	            trap = cl.trap; // Osmose titles shouldn't contain markdown
 
-	    // find the common parent ways for nextVertex, previousVertex
-	    function commonParents() {
-	        var graph = context.graph();
-	        var commonParents = [];
+	        var issueStrings = {};
+	        if (title) issueStrings.title = title.auto;
+	        if (detail) issueStrings.detail = marked_1(detail.auto);
+	        if (trap) issueStrings.trap = marked_1(trap.auto);
+	        if (fix) issueStrings.fix = marked_1(fix.auto);
+	        _cache.strings[locale][itemType] = issueStrings;
+	      };
 
-	        for (var i = 0; i < selectedIDs.length; i++) {
-	            var entity = context.hasEntity(selectedIDs[i]);
-	            if (!entity || entity.geometry(graph) !== 'vertex') {
-	                return [];  // selection includes some not vertexes
-	            }
+	      var _itemType$split = itemType.split('-'),
+	          _itemType$split2 = _slicedToArray(_itemType$split, 2),
+	          item = _itemType$split2[0],
+	          cl = _itemType$split2[1]; // Osmose API falls back to English strings where untranslated or if locale doesn't exist
 
-	            var currParents = graph.parentWays(entity).map(function(w) { return w.id; });
-	            if (!commonParents.length) {
-	                commonParents = currParents;
-	                continue;
-	            }
 
-	            commonParents = utilArrayIntersection(commonParents, currParents);
-	            if (!commonParents.length) {
-	                return [];
-	            }
-	        }
+	      var url = "".concat(_osmoseUrlRoot, "/items/").concat(item, "/class/").concat(cl, "?langs=").concat(locale);
+	      return d3_json(url).then(cacheData);
+	    }).filter(Boolean);
+	    return Promise.all(allRequests).then(function () {
+	      return _cache.strings[locale];
+	    });
+	  },
+	  getStrings: function getStrings(itemType) {
+	    var locale = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : _mainLocalizer.localeCode();
+	    // No need to fallback to English, Osmose API handles this for us
+	    return locale in _cache.strings ? _cache.strings[locale][itemType] : {};
+	  },
+	  getColor: function getColor(itemType) {
+	    return itemType in _cache.colors ? _cache.colors[itemType] : '#FFFFFF';
+	  },
+	  postUpdate: function postUpdate(issue, callback) {
+	    var _this3 = this;
 
-	        return commonParents;
-	    }
+	    if (_cache.inflightPost[issue.id]) {
+	      return callback({
+	        message: 'Issue update already inflight',
+	        status: -2
+	      }, issue);
+	    } // UI sets the status to either 'done' or 'false'
 
 
-	    function singularParent() {
-	        var parents = commonParents();
-	        if (!parents || parents.length === 0) {
-	            _relatedParent = null;
-	            return null;
-	        }
+	    var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "/").concat(issue.newStatus);
+	    var controller = new AbortController();
 
-	        // relatedParent is used when we visit a vertex with multiple
-	        // parents, and we want to remember which parent line we started on.
+	    var after = function after() {
+	      delete _cache.inflightPost[issue.id];
 
-	        if (parents.length === 1) {
-	            _relatedParent = parents[0];  // remember this parent for later
-	            return _relatedParent;
-	        }
+	      _this3.removeItem(issue);
 
-	        if (parents.indexOf(_relatedParent) !== -1) {
-	            return _relatedParent;   // prefer the previously seen parent
+	      if (issue.newStatus === 'done') {
+	        // Keep track of the number of issues closed per `item` to tag the changeset
+	        if (!(issue.item in _cache.closed)) {
+	          _cache.closed[issue.item] = 0;
 	        }
 
-	        return parents[0];
-	    }
-
+	        _cache.closed[issue.item] += 1;
+	      }
 
-	    mode.selectedIDs = function(val) {
-	        if (!arguments.length) { return selectedIDs; }
-	        selectedIDs = val;
-	        return mode;
+	      if (callback) callback(null, issue);
 	    };
 
+	    _cache.inflightPost[issue.id] = controller;
+	    fetch(url, {
+	      signal: controller.signal
+	    }).then(after)["catch"](function (err) {
+	      delete _cache.inflightPost[issue.id];
+	      if (callback) callback(err.message);
+	    });
+	  },
+	  // Get all cached QAItems covering the viewport
+	  getItems: function getItems(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    return _cache.rtree.search(bbox).map(function (d) {
+	      return d.data;
+	    });
+	  },
+	  // Get a QAItem from cache
+	  // NOTE: Don't change method name until UI v3 is merged
+	  getError: function getError(id) {
+	    return _cache.data[id];
+	  },
+	  // get the name of the icon to display for this item
+	  getIcon: function getIcon(itemType) {
+	    return _osmoseData.icons[itemType];
+	  },
+	  // Replace a single QAItem in the cache
+	  replaceItem: function replaceItem(item) {
+	    if (!(item instanceof QAItem) || !item.id) return;
+	    _cache.data[item.id] = item;
+	    updateRtree$1(encodeIssueRtree(item), true); // true = replace
 
-	    mode.zoomToSelected = function() {
-	        context.map().zoomToEase(selectedEntities());
-	    };
+	    return item;
+	  },
+	  // Remove a single QAItem from the cache
+	  removeItem: function removeItem(item) {
+	    if (!(item instanceof QAItem) || !item.id) return;
+	    delete _cache.data[item.id];
+	    updateRtree$1(encodeIssueRtree(item), false); // false = remove
+	  },
+	  // Used to populate `closed:osmose:*` changeset tags
+	  getClosedCounts: function getClosedCounts() {
+	    return _cache.closed;
+	  },
+	  itemURL: function itemURL(item) {
+	    return "https://osmose.openstreetmap.fr/en/error/".concat(item.id);
+	  }
+	};
 
+	var ieee754$1 = {};
 
-	    mode.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        return mode;
-	    };
+	/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
 
+	ieee754$1.read = function (buffer, offset, isLE, mLen, nBytes) {
+	  var e, m;
+	  var eLen = nBytes * 8 - mLen - 1;
+	  var eMax = (1 << eLen) - 1;
+	  var eBias = eMax >> 1;
+	  var nBits = -7;
+	  var i = isLE ? nBytes - 1 : 0;
+	  var d = isLE ? -1 : 1;
+	  var s = buffer[offset + i];
+	  i += d;
+	  e = s & (1 << -nBits) - 1;
+	  s >>= -nBits;
+	  nBits += eLen;
 
-	    mode.selectBehavior = function(val) {
-	        if (!arguments.length) { return _selectBehavior; }
-	        _selectBehavior = val;
-	        return mode;
-	    };
+	  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
+	  m = e & (1 << -nBits) - 1;
+	  e >>= -nBits;
+	  nBits += mLen;
 
-	    mode.follow = function(val) {
-	        if (!arguments.length) { return _follow; }
-	        _follow = val;
-	        return mode;
-	    };
+	  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
-	    function loadOperations() {
+	  if (e === 0) {
+	    e = 1 - eBias;
+	  } else if (e === eMax) {
+	    return m ? NaN : (s ? -1 : 1) * Infinity;
+	  } else {
+	    m = m + Math.pow(2, mLen);
+	    e = e - eBias;
+	  }
 
-	        _operations.forEach(function(operation) {
-	            if (operation.behavior) {
-	                context.uninstall(operation.behavior);
-	            }
-	        });
+	  return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
+	};
 
-	        _operations = Object.values(Operations)
-	            .map(function(o) { return o(context, selectedIDs); })
-	            .filter(function(o) { return o.available() && o.id !== 'delete' && o.id !== 'downgrade' && o.id !== 'copy'; });
+	ieee754$1.write = function (buffer, value, offset, isLE, mLen, nBytes) {
+	  var e, m, c;
+	  var eLen = nBytes * 8 - mLen - 1;
+	  var eMax = (1 << eLen) - 1;
+	  var eBias = eMax >> 1;
+	  var rt = mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0;
+	  var i = isLE ? 0 : nBytes - 1;
+	  var d = isLE ? 1 : -1;
+	  var s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0;
+	  value = Math.abs(value);
 
-	        var copyOperation = operationCopy(context, selectedIDs);
-	        if (copyOperation.available()) {
-	            // group copy operation with delete/downgrade
-	            _operations.push(copyOperation);
-	        }
+	  if (isNaN(value) || value === Infinity) {
+	    m = isNaN(value) ? 1 : 0;
+	    e = eMax;
+	  } else {
+	    e = Math.floor(Math.log(value) / Math.LN2);
 
-	        var downgradeOperation = operationDowngrade(context, selectedIDs);
-	        // don't allow delete if downgrade is available
-	        var lastOperation = !context.inIntro() && downgradeOperation.available() ? downgradeOperation : operationDelete(context, selectedIDs);
+	    if (value * (c = Math.pow(2, -e)) < 1) {
+	      e--;
+	      c *= 2;
+	    }
 
-	        _operations.push(lastOperation);
+	    if (e + eBias >= 1) {
+	      value += rt / c;
+	    } else {
+	      value += rt * Math.pow(2, 1 - eBias);
+	    }
 
-	        _operations.forEach(function(operation) {
-	            if (operation.behavior) {
-	                context.install(operation.behavior);
-	            }
-	        });
+	    if (value * c >= 2) {
+	      e++;
+	      c /= 2;
+	    }
 
-	        // remove any displayed menu
-	        context.ui().closeEditMenu();
+	    if (e + eBias >= eMax) {
+	      m = 0;
+	      e = eMax;
+	    } else if (e + eBias >= 1) {
+	      m = (value * c - 1) * Math.pow(2, mLen);
+	      e = e + eBias;
+	    } else {
+	      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
+	      e = 0;
 	    }
+	  }
 
-	    mode.operations = function() {
-	        return _operations;
-	    };
+	  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
 
+	  e = e << mLen | m;
+	  eLen += mLen;
 
-	    mode.enter = function() {
-	        if (!checkSelectedIDs()) { return; }
-
-	        context.features().forceVisible(selectedIDs);
-
-	        _modeDragNode.restoreSelectedIDs(selectedIDs);
-
-	        loadOperations();
-
-	        if (!_behaviors.length) {
-	            if (!_selectBehavior) { _selectBehavior = behaviorSelect(context); }
-
-	            _behaviors = [
-	                behaviorPaste(context),
-	                _breatheBehavior,
-	                behaviorHover(context).on('hover', context.ui().sidebar.hoverModeSelect),
-	                _selectBehavior,
-	                behaviorLasso(context),
-	                _modeDragNode.behavior,
-	                modeDragNote(context).behavior
-	            ];
-	        }
-	        _behaviors.forEach(context.install);
-
-	        keybinding
-	            .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-	            .on(['[', 'pgup'], previousVertex)
-	            .on([']', 'pgdown'], nextVertex)
-	            .on(['{', uiCmd('⌘['), 'home'], firstVertex)
-	            .on(['}', uiCmd('⌘]'), 'end'], lastVertex)
-	            .on(uiCmd('⇧←'), nudgeSelection([-10, 0]))
-	            .on(uiCmd('⇧↑'), nudgeSelection([0, -10]))
-	            .on(uiCmd('⇧→'), nudgeSelection([10, 0]))
-	            .on(uiCmd('⇧↓'), nudgeSelection([0, 10]))
-	            .on(uiCmd('⇧⌘←'), nudgeSelection([-100, 0]))
-	            .on(uiCmd('⇧⌘↑'), nudgeSelection([0, -100]))
-	            .on(uiCmd('⇧⌘→'), nudgeSelection([100, 0]))
-	            .on(uiCmd('⇧⌘↓'), nudgeSelection([0, 100]))
-	            .on(['\\', 'pause'], nextParent)
-	            .on('⎋', esc, true);
-
-	        select(document)
-	            .call(keybinding);
-
-	        context.ui().sidebar
-	            .select(selectedIDs, _newFeature);
-
-	        context.history()
-	            .on('change.select', function() {
-	                loadOperations();
-	                // reselect after change in case relation members were removed or added
-	                selectElements();
-	            })
-	            .on('undone.select', checkSelectedIDs)
-	            .on('redone.select', checkSelectedIDs);
-
-	        context.map()
-	            .on('drawn.select', selectElements)
-	            .on('crossEditableZoom.select', function() {
-	                selectElements();
-	                _breatheBehavior.restartIfNeeded(context.surface());
-	            });
+	  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
 
-	        context.map().doubleUpHandler()
-	            .on('doubleUp.modeSelect', didDoubleUp);
+	  buffer[offset + i - d] |= s * 128;
+	};
 
+	var pbf = Pbf;
+	var ieee754 = ieee754$1;
 
-	        selectElements();
+	function Pbf(buf) {
+	  this.buf = ArrayBuffer.isView && ArrayBuffer.isView(buf) ? buf : new Uint8Array(buf || 0);
+	  this.pos = 0;
+	  this.type = 0;
+	  this.length = this.buf.length;
+	}
 
-	        if (_follow) {
-	            var extent = geoExtent();
-	            var graph = context.graph();
-	            selectedIDs.forEach(function(id) {
-	                var entity = context.entity(id);
-	                extent._extend(entity.extent(graph));
-	            });
+	Pbf.Varint = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
 
-	            var loc = extent.center();
-	            context.map().centerEase(loc);
-	            // we could enter the mode multiple times, so reset follow for next time
-	            _follow = false;
-	        }
+	Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
 
+	Pbf.Bytes = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
 
-	        function nudgeSelection(delta) {
-	            return function() {
-	                // prevent nudging during low zoom selection
-	                if (!context.map().withinEditableZoom()) { return; }
+	Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
 
-	                var moveOp = operationMove(context, selectedIDs);
-	                if (moveOp.disabled()) {
-	                    context.ui().flash
-	                        .duration(4000)
-	                        .iconName('#iD-operation-' + moveOp.id)
-	                        .iconClass('operation disabled')
-	                        .text(moveOp.tooltip)();
-	                } else {
-	                    context.perform(actionMove(selectedIDs, delta, context.projection), moveOp.annotation());
-	                }
-	            };
-	        }
+	var SHIFT_LEFT_32 = (1 << 16) * (1 << 16),
+	    SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32; // Threshold chosen based on both benchmarking and knowledge about browser string
+	// data structures (which currently switch structure types at 12 bytes or more)
 
+	var TEXT_DECODER_MIN_LENGTH = 12;
+	var utf8TextDecoder = typeof TextDecoder === 'undefined' ? null : new TextDecoder('utf8');
+	Pbf.prototype = {
+	  destroy: function destroy() {
+	    this.buf = null;
+	  },
+	  // === READING =================================================================
+	  readFields: function readFields(readField, result, end) {
+	    end = end || this.length;
 
-	        function didDoubleUp(loc) {
-	            if (!context.map().withinEditableZoom()) { return; }
+	    while (this.pos < end) {
+	      var val = this.readVarint(),
+	          tag = val >> 3,
+	          startPos = this.pos;
+	      this.type = val & 0x7;
+	      readField(tag, result, this);
+	      if (this.pos === startPos) this.skip(val);
+	    }
 
-	            var target = select(event.target);
+	    return result;
+	  },
+	  readMessage: function readMessage(readField, result) {
+	    return this.readFields(readField, result, this.readVarint() + this.pos);
+	  },
+	  readFixed32: function readFixed32() {
+	    var val = readUInt32(this.buf, this.pos);
+	    this.pos += 4;
+	    return val;
+	  },
+	  readSFixed32: function readSFixed32() {
+	    var val = readInt32(this.buf, this.pos);
+	    this.pos += 4;
+	    return val;
+	  },
+	  // 64-bit int handling is based on github.com/dpw/node-buffer-more-ints (MIT-licensed)
+	  readFixed64: function readFixed64() {
+	    var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
+	    this.pos += 8;
+	    return val;
+	  },
+	  readSFixed64: function readSFixed64() {
+	    var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
+	    this.pos += 8;
+	    return val;
+	  },
+	  readFloat: function readFloat() {
+	    var val = ieee754.read(this.buf, this.pos, true, 23, 4);
+	    this.pos += 4;
+	    return val;
+	  },
+	  readDouble: function readDouble() {
+	    var val = ieee754.read(this.buf, this.pos, true, 52, 8);
+	    this.pos += 8;
+	    return val;
+	  },
+	  readVarint: function readVarint(isSigned) {
+	    var buf = this.buf,
+	        val,
+	        b;
+	    b = buf[this.pos++];
+	    val = b & 0x7f;
+	    if (b < 0x80) return val;
+	    b = buf[this.pos++];
+	    val |= (b & 0x7f) << 7;
+	    if (b < 0x80) return val;
+	    b = buf[this.pos++];
+	    val |= (b & 0x7f) << 14;
+	    if (b < 0x80) return val;
+	    b = buf[this.pos++];
+	    val |= (b & 0x7f) << 21;
+	    if (b < 0x80) return val;
+	    b = buf[this.pos];
+	    val |= (b & 0x0f) << 28;
+	    return readVarintRemainder(val, isSigned, this);
+	  },
+	  readVarint64: function readVarint64() {
+	    // for compatibility with v2.0.1
+	    return this.readVarint(true);
+	  },
+	  readSVarint: function readSVarint() {
+	    var num = this.readVarint();
+	    return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding
+	  },
+	  readBoolean: function readBoolean() {
+	    return Boolean(this.readVarint());
+	  },
+	  readString: function readString() {
+	    var end = this.readVarint() + this.pos;
+	    var pos = this.pos;
+	    this.pos = end;
 
-	            var datum = target.datum();
-	            var entity = datum && datum.properties && datum.properties.entity;
-	            if (!entity) { return; }
+	    if (end - pos >= TEXT_DECODER_MIN_LENGTH && utf8TextDecoder) {
+	      // longer strings are fast with the built-in browser TextDecoder API
+	      return readUtf8TextDecoder(this.buf, pos, end);
+	    } // short strings are fast with our custom implementation
 
-	            if (entity instanceof osmWay && target.classed('target')) {
-	                var choice = geoChooseEdge(context.graph().childNodes(entity), loc, context.projection);
-	                var prev = entity.nodes[choice.index - 1];
-	                var next = entity.nodes[choice.index];
 
-	                context.perform(
-	                    actionAddMidpoint({ loc: choice.loc, edge: [prev, next] }, osmNode()),
-	                    _t('operations.add.annotation.vertex')
-	                );
+	    return readUtf8(this.buf, pos, end);
+	  },
+	  readBytes: function readBytes() {
+	    var end = this.readVarint() + this.pos,
+	        buffer = this.buf.subarray(this.pos, end);
+	    this.pos = end;
+	    return buffer;
+	  },
+	  // verbose for performance reasons; doesn't affect gzipped size
+	  readPackedVarint: function readPackedVarint(arr, isSigned) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readVarint(isSigned));
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	            } else if (entity.type === 'midpoint') {
-	                context.perform(
-	                    actionAddMidpoint({ loc: entity.loc, edge: entity.edge }, osmNode()),
-	                    _t('operations.add.annotation.vertex'));
-	            }
-	        }
+	    while (this.pos < end) {
+	      arr.push(this.readVarint(isSigned));
+	    }
 
+	    return arr;
+	  },
+	  readPackedSVarint: function readPackedSVarint(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readSVarint());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	        function selectElements() {
-	            if (!checkSelectedIDs()) { return; }
+	    while (this.pos < end) {
+	      arr.push(this.readSVarint());
+	    }
 
-	            var surface = context.surface();
+	    return arr;
+	  },
+	  readPackedBoolean: function readPackedBoolean(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readBoolean());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	            surface.selectAll('.selected-member')
-	                .classed('selected-member', false);
+	    while (this.pos < end) {
+	      arr.push(this.readBoolean());
+	    }
 
-	            surface.selectAll('.selected')
-	                .classed('selected', false);
+	    return arr;
+	  },
+	  readPackedFloat: function readPackedFloat(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readFloat());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	            surface.selectAll('.related')
-	                .classed('related', false);
+	    while (this.pos < end) {
+	      arr.push(this.readFloat());
+	    }
 
-	            singularParent();
-	            if (_relatedParent) {
-	                surface.selectAll(utilEntitySelector([_relatedParent]))
-	                    .classed('related', true);
-	            }
+	    return arr;
+	  },
+	  readPackedDouble: function readPackedDouble(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readDouble());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	            if (context.map().withinEditableZoom()) {
-	                // Apply selection styling if not in wide selection
+	    while (this.pos < end) {
+	      arr.push(this.readDouble());
+	    }
 
-	                surface
-	                    .selectAll(utilDeepMemberSelector(selectedIDs, context.graph(), true /* skipMultipolgonMembers */))
-	                    .classed('selected-member', true);
-	                surface
-	                    .selectAll(utilEntityOrDeepMemberSelector(selectedIDs, context.graph()))
-	                    .classed('selected', true);
-	            }
+	    return arr;
+	  },
+	  readPackedFixed32: function readPackedFixed32(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readFixed32());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	        }
+	    while (this.pos < end) {
+	      arr.push(this.readFixed32());
+	    }
 
+	    return arr;
+	  },
+	  readPackedSFixed32: function readPackedSFixed32(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed32());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	        function esc() {
-	            if (context.container().select('.combobox').size()) { return; }
-	            context.enter(modeBrowse(context));
-	        }
+	    while (this.pos < end) {
+	      arr.push(this.readSFixed32());
+	    }
 
+	    return arr;
+	  },
+	  readPackedFixed64: function readPackedFixed64(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readFixed64());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	        function firstVertex() {
-	            event.preventDefault();
-	            var entity = singular();
-	            var parent = singularParent();
-	            var way;
+	    while (this.pos < end) {
+	      arr.push(this.readFixed64());
+	    }
 
-	            if (entity && entity.type === 'way') {
-	                way = entity;
-	            } else if (parent) {
-	                way = context.entity(parent);
-	            }
+	    return arr;
+	  },
+	  readPackedSFixed64: function readPackedSFixed64(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed64());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	            if (way) {
-	                context.enter(
-	                    modeSelect(context, [way.first()]).follow(true)
-	                );
-	            }
-	        }
+	    while (this.pos < end) {
+	      arr.push(this.readSFixed64());
+	    }
 
+	    return arr;
+	  },
+	  skip: function skip(val) {
+	    var type = val & 0x7;
+	    if (type === Pbf.Varint) while (this.buf[this.pos++] > 0x7f) {} else if (type === Pbf.Bytes) this.pos = this.readVarint() + this.pos;else if (type === Pbf.Fixed32) this.pos += 4;else if (type === Pbf.Fixed64) this.pos += 8;else throw new Error('Unimplemented type: ' + type);
+	  },
+	  // === WRITING =================================================================
+	  writeTag: function writeTag(tag, type) {
+	    this.writeVarint(tag << 3 | type);
+	  },
+	  realloc: function realloc(min) {
+	    var length = this.length || 16;
 
-	        function lastVertex() {
-	            event.preventDefault();
-	            var entity = singular();
-	            var parent = singularParent();
-	            var way;
+	    while (length < this.pos + min) {
+	      length *= 2;
+	    }
 
-	            if (entity && entity.type === 'way') {
-	                way = entity;
-	            } else if (parent) {
-	                way = context.entity(parent);
-	            }
+	    if (length !== this.length) {
+	      var buf = new Uint8Array(length);
+	      buf.set(this.buf);
+	      this.buf = buf;
+	      this.length = length;
+	    }
+	  },
+	  finish: function finish() {
+	    this.length = this.pos;
+	    this.pos = 0;
+	    return this.buf.subarray(0, this.length);
+	  },
+	  writeFixed32: function writeFixed32(val) {
+	    this.realloc(4);
+	    writeInt32(this.buf, val, this.pos);
+	    this.pos += 4;
+	  },
+	  writeSFixed32: function writeSFixed32(val) {
+	    this.realloc(4);
+	    writeInt32(this.buf, val, this.pos);
+	    this.pos += 4;
+	  },
+	  writeFixed64: function writeFixed64(val) {
+	    this.realloc(8);
+	    writeInt32(this.buf, val & -1, this.pos);
+	    writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
+	    this.pos += 8;
+	  },
+	  writeSFixed64: function writeSFixed64(val) {
+	    this.realloc(8);
+	    writeInt32(this.buf, val & -1, this.pos);
+	    writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
+	    this.pos += 8;
+	  },
+	  writeVarint: function writeVarint(val) {
+	    val = +val || 0;
 
-	            if (way) {
-	                context.enter(
-	                    modeSelect(context, [way.last()]).follow(true)
-	                );
-	            }
-	        }
+	    if (val > 0xfffffff || val < 0) {
+	      writeBigVarint(val, this);
+	      return;
+	    }
 
+	    this.realloc(4);
+	    this.buf[this.pos++] = val & 0x7f | (val > 0x7f ? 0x80 : 0);
+	    if (val <= 0x7f) return;
+	    this.buf[this.pos++] = (val >>>= 7) & 0x7f | (val > 0x7f ? 0x80 : 0);
+	    if (val <= 0x7f) return;
+	    this.buf[this.pos++] = (val >>>= 7) & 0x7f | (val > 0x7f ? 0x80 : 0);
+	    if (val <= 0x7f) return;
+	    this.buf[this.pos++] = val >>> 7 & 0x7f;
+	  },
+	  writeSVarint: function writeSVarint(val) {
+	    this.writeVarint(val < 0 ? -val * 2 - 1 : val * 2);
+	  },
+	  writeBoolean: function writeBoolean(val) {
+	    this.writeVarint(Boolean(val));
+	  },
+	  writeString: function writeString(str) {
+	    str = String(str);
+	    this.realloc(str.length * 4);
+	    this.pos++; // reserve 1 byte for short string length
 
-	        function previousVertex() {
-	            event.preventDefault();
-	            var parent = singularParent();
-	            if (!parent) { return; }
+	    var startPos = this.pos; // write the string directly to the buffer and see how much was written
 
-	            var way = context.entity(parent);
-	            var length = way.nodes.length;
-	            var curr = way.nodes.indexOf(selectedIDs[0]);
-	            var index = -1;
+	    this.pos = writeUtf8(this.buf, str, this.pos);
+	    var len = this.pos - startPos;
+	    if (len >= 0x80) makeRoomForExtraLength(startPos, len, this); // finally, write the message length in the reserved place and restore the position
 
-	            if (curr > 0) {
-	                index = curr - 1;
-	            } else if (way.isClosed()) {
-	                index = length - 2;
-	            }
+	    this.pos = startPos - 1;
+	    this.writeVarint(len);
+	    this.pos += len;
+	  },
+	  writeFloat: function writeFloat(val) {
+	    this.realloc(4);
+	    ieee754.write(this.buf, val, this.pos, true, 23, 4);
+	    this.pos += 4;
+	  },
+	  writeDouble: function writeDouble(val) {
+	    this.realloc(8);
+	    ieee754.write(this.buf, val, this.pos, true, 52, 8);
+	    this.pos += 8;
+	  },
+	  writeBytes: function writeBytes(buffer) {
+	    var len = buffer.length;
+	    this.writeVarint(len);
+	    this.realloc(len);
 
-	            if (index !== -1) {
-	                context.enter(
-	                    modeSelect(context, [way.nodes[index]]).follow(true)
-	                );
-	            }
-	        }
+	    for (var i = 0; i < len; i++) {
+	      this.buf[this.pos++] = buffer[i];
+	    }
+	  },
+	  writeRawMessage: function writeRawMessage(fn, obj) {
+	    this.pos++; // reserve 1 byte for short message length
+	    // write the message directly to the buffer and see how much was written
+
+	    var startPos = this.pos;
+	    fn(obj, this);
+	    var len = this.pos - startPos;
+	    if (len >= 0x80) makeRoomForExtraLength(startPos, len, this); // finally, write the message length in the reserved place and restore the position
+
+	    this.pos = startPos - 1;
+	    this.writeVarint(len);
+	    this.pos += len;
+	  },
+	  writeMessage: function writeMessage(tag, fn, obj) {
+	    this.writeTag(tag, Pbf.Bytes);
+	    this.writeRawMessage(fn, obj);
+	  },
+	  writePackedVarint: function writePackedVarint(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedVarint, arr);
+	  },
+	  writePackedSVarint: function writePackedSVarint(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedSVarint, arr);
+	  },
+	  writePackedBoolean: function writePackedBoolean(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedBoolean, arr);
+	  },
+	  writePackedFloat: function writePackedFloat(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedFloat, arr);
+	  },
+	  writePackedDouble: function writePackedDouble(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedDouble, arr);
+	  },
+	  writePackedFixed32: function writePackedFixed32(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedFixed, arr);
+	  },
+	  writePackedSFixed32: function writePackedSFixed32(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedSFixed, arr);
+	  },
+	  writePackedFixed64: function writePackedFixed64(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedFixed2, arr);
+	  },
+	  writePackedSFixed64: function writePackedSFixed64(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedSFixed2, arr);
+	  },
+	  writeBytesField: function writeBytesField(tag, buffer) {
+	    this.writeTag(tag, Pbf.Bytes);
+	    this.writeBytes(buffer);
+	  },
+	  writeFixed32Field: function writeFixed32Field(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed32);
+	    this.writeFixed32(val);
+	  },
+	  writeSFixed32Field: function writeSFixed32Field(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed32);
+	    this.writeSFixed32(val);
+	  },
+	  writeFixed64Field: function writeFixed64Field(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed64);
+	    this.writeFixed64(val);
+	  },
+	  writeSFixed64Field: function writeSFixed64Field(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed64);
+	    this.writeSFixed64(val);
+	  },
+	  writeVarintField: function writeVarintField(tag, val) {
+	    this.writeTag(tag, Pbf.Varint);
+	    this.writeVarint(val);
+	  },
+	  writeSVarintField: function writeSVarintField(tag, val) {
+	    this.writeTag(tag, Pbf.Varint);
+	    this.writeSVarint(val);
+	  },
+	  writeStringField: function writeStringField(tag, str) {
+	    this.writeTag(tag, Pbf.Bytes);
+	    this.writeString(str);
+	  },
+	  writeFloatField: function writeFloatField(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed32);
+	    this.writeFloat(val);
+	  },
+	  writeDoubleField: function writeDoubleField(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed64);
+	    this.writeDouble(val);
+	  },
+	  writeBooleanField: function writeBooleanField(tag, val) {
+	    this.writeVarintField(tag, Boolean(val));
+	  }
+	};
 
+	function readVarintRemainder(l, s, p) {
+	  var buf = p.buf,
+	      h,
+	      b;
+	  b = buf[p.pos++];
+	  h = (b & 0x70) >> 4;
+	  if (b < 0x80) return toNum(l, h, s);
+	  b = buf[p.pos++];
+	  h |= (b & 0x7f) << 3;
+	  if (b < 0x80) return toNum(l, h, s);
+	  b = buf[p.pos++];
+	  h |= (b & 0x7f) << 10;
+	  if (b < 0x80) return toNum(l, h, s);
+	  b = buf[p.pos++];
+	  h |= (b & 0x7f) << 17;
+	  if (b < 0x80) return toNum(l, h, s);
+	  b = buf[p.pos++];
+	  h |= (b & 0x7f) << 24;
+	  if (b < 0x80) return toNum(l, h, s);
+	  b = buf[p.pos++];
+	  h |= (b & 0x01) << 31;
+	  if (b < 0x80) return toNum(l, h, s);
+	  throw new Error('Expected varint not more than 10 bytes');
+	}
 
-	        function nextVertex() {
-	            event.preventDefault();
-	            var parent = singularParent();
-	            if (!parent) { return; }
+	function readPackedEnd(pbf) {
+	  return pbf.type === Pbf.Bytes ? pbf.readVarint() + pbf.pos : pbf.pos + 1;
+	}
 
-	            var way = context.entity(parent);
-	            var length = way.nodes.length;
-	            var curr = way.nodes.indexOf(selectedIDs[0]);
-	            var index = -1;
+	function toNum(low, high, isSigned) {
+	  if (isSigned) {
+	    return high * 0x100000000 + (low >>> 0);
+	  }
 
-	            if (curr < length - 1) {
-	                index = curr + 1;
-	            } else if (way.isClosed()) {
-	                index = 0;
-	            }
+	  return (high >>> 0) * 0x100000000 + (low >>> 0);
+	}
 
-	            if (index !== -1) {
-	                context.enter(
-	                    modeSelect(context, [way.nodes[index]]).follow(true)
-	                );
-	            }
-	        }
+	function writeBigVarint(val, pbf) {
+	  var low, high;
 
+	  if (val >= 0) {
+	    low = val % 0x100000000 | 0;
+	    high = val / 0x100000000 | 0;
+	  } else {
+	    low = ~(-val % 0x100000000);
+	    high = ~(-val / 0x100000000);
 
-	        function nextParent() {
-	            event.preventDefault();
-	            var parents = commonParents();
-	            if (!parents || parents.length < 2) { return; }
+	    if (low ^ 0xffffffff) {
+	      low = low + 1 | 0;
+	    } else {
+	      low = 0;
+	      high = high + 1 | 0;
+	    }
+	  }
 
-	            var index = parents.indexOf(_relatedParent);
-	            if (index < 0 || index > parents.length - 2) {
-	                _relatedParent = parents[0];
-	            } else {
-	                _relatedParent = parents[index + 1];
-	            }
+	  if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
+	    throw new Error('Given varint doesn\'t fit into 10 bytes');
+	  }
 
-	            var surface = context.surface();
-	            surface.selectAll('.related')
-	                .classed('related', false);
+	  pbf.realloc(10);
+	  writeBigVarintLow(low, high, pbf);
+	  writeBigVarintHigh(high, pbf);
+	}
 
-	            if (_relatedParent) {
-	                surface.selectAll(utilEntitySelector([_relatedParent]))
-	                    .classed('related', true);
-	            }
-	        }
-	    };
+	function writeBigVarintLow(low, high, pbf) {
+	  pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+	  low >>>= 7;
+	  pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+	  low >>>= 7;
+	  pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+	  low >>>= 7;
+	  pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+	  low >>>= 7;
+	  pbf.buf[pbf.pos] = low & 0x7f;
+	}
 
+	function writeBigVarintHigh(high, pbf) {
+	  var lsb = (high & 0x07) << 4;
+	  pbf.buf[pbf.pos++] |= lsb | ((high >>>= 3) ? 0x80 : 0);
+	  if (!high) return;
+	  pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+	  if (!high) return;
+	  pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+	  if (!high) return;
+	  pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+	  if (!high) return;
+	  pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+	  if (!high) return;
+	  pbf.buf[pbf.pos++] = high & 0x7f;
+	}
 
-	    mode.exit = function() {
+	function makeRoomForExtraLength(startPos, len, pbf) {
+	  var extraLen = len <= 0x3fff ? 1 : len <= 0x1fffff ? 2 : len <= 0xfffffff ? 3 : Math.floor(Math.log(len) / (Math.LN2 * 7)); // if 1 byte isn't enough for encoding message length, shift the data to the right
 
-	        _newFeature = false;
+	  pbf.realloc(extraLen);
 
-	        _operations.forEach(function(operation) {
-	            if (operation.behavior) {
-	                context.uninstall(operation.behavior);
-	            }
-	        });
-	        _operations = [];
+	  for (var i = pbf.pos - 1; i >= startPos; i--) {
+	    pbf.buf[i + extraLen] = pbf.buf[i];
+	  }
+	}
 
-	        _behaviors.forEach(context.uninstall);
+	function _writePackedVarint(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeVarint(arr[i]);
+	  }
+	}
 
-	        select(document)
-	            .call(keybinding.unbind);
+	function _writePackedSVarint(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeSVarint(arr[i]);
+	  }
+	}
 
-	        context.ui().closeEditMenu();
+	function _writePackedFloat(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeFloat(arr[i]);
+	  }
+	}
 
-	        context.history()
-	            .on('change.select', null)
-	            .on('undone.select', null)
-	            .on('redone.select', null);
+	function _writePackedDouble(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeDouble(arr[i]);
+	  }
+	}
 
-	        var surface = context.surface();
+	function _writePackedBoolean(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeBoolean(arr[i]);
+	  }
+	}
 
-	        surface
-	            .selectAll('.selected-member')
-	            .classed('selected-member', false);
+	function _writePackedFixed(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeFixed32(arr[i]);
+	  }
+	}
 
-	        surface
-	            .selectAll('.selected')
-	            .classed('selected', false);
+	function _writePackedSFixed(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeSFixed32(arr[i]);
+	  }
+	}
 
-	        surface
-	            .selectAll('.highlighted')
-	            .classed('highlighted', false);
+	function _writePackedFixed2(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeFixed64(arr[i]);
+	  }
+	}
 
-	        surface
-	            .selectAll('.related')
-	            .classed('related', false);
+	function _writePackedSFixed2(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeSFixed64(arr[i]);
+	  }
+	} // Buffer code below from https://github.com/feross/buffer, MIT-licensed
 
-	        context.map().on('drawn.select', null);
-	        context.ui().sidebar.hide();
-	        context.features().forceVisible([]);
 
-	        var entity = singular();
-	        if (_newFeature && entity && entity.type === 'relation' &&
-	            // no tags
-	            Object.keys(entity.tags).length === 0 &&
-	            // no parent relations
-	            context.graph().parentRelations(entity).length === 0 &&
-	            // no members or one member with no role
-	            (entity.members.length === 0 || (entity.members.length === 1 && !entity.members[0].role))
-	        ) {
-	            // the user added this relation but didn't edit it at all, so just delete it
-	            var deleteAction = actionDeleteRelation(entity.id, true /* don't delete untagged members */);
-	            context.perform(deleteAction, _t('operations.delete.annotation.relation'));
-	        }
-	    };
+	function readUInt32(buf, pos) {
+	  return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + buf[pos + 3] * 0x1000000;
+	}
 
+	function writeInt32(buf, val, pos) {
+	  buf[pos] = val;
+	  buf[pos + 1] = val >>> 8;
+	  buf[pos + 2] = val >>> 16;
+	  buf[pos + 3] = val >>> 24;
+	}
 
-	    return mode;
+	function readInt32(buf, pos) {
+	  return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + (buf[pos + 3] << 24);
 	}
 
-	function uiLasso(context) {
-	    var group, polygon;
+	function readUtf8(buf, pos, end) {
+	  var str = '';
+	  var i = pos;
 
-	    lasso.coordinates = [];
+	  while (i < end) {
+	    var b0 = buf[i];
+	    var c = null; // codepoint
 
-	    function lasso(selection) {
-	        context.container()
-	            .classed('lasso', true);
+	    var bytesPerSequence = b0 > 0xEF ? 4 : b0 > 0xDF ? 3 : b0 > 0xBF ? 2 : 1;
+	    if (i + bytesPerSequence > end) break;
+	    var b1, b2, b3;
 
-	        group = selection
-	            .append('g')
-	            .attr('class', 'lasso hide');
+	    if (bytesPerSequence === 1) {
+	      if (b0 < 0x80) {
+	        c = b0;
+	      }
+	    } else if (bytesPerSequence === 2) {
+	      b1 = buf[i + 1];
 
-	        polygon = group
-	            .append('path')
-	            .attr('class', 'lasso-path');
+	      if ((b1 & 0xC0) === 0x80) {
+	        c = (b0 & 0x1F) << 0x6 | b1 & 0x3F;
 
-	        group
-	            .call(uiToggle(true));
-	    }
+	        if (c <= 0x7F) {
+	          c = null;
+	        }
+	      }
+	    } else if (bytesPerSequence === 3) {
+	      b1 = buf[i + 1];
+	      b2 = buf[i + 2];
+
+	      if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
+	        c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | b2 & 0x3F;
+
+	        if (c <= 0x7FF || c >= 0xD800 && c <= 0xDFFF) {
+	          c = null;
+	        }
+	      }
+	    } else if (bytesPerSequence === 4) {
+	      b1 = buf[i + 1];
+	      b2 = buf[i + 2];
+	      b3 = buf[i + 3];
 
+	      if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
+	        c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | b3 & 0x3F;
 
-	    function draw() {
-	        if (polygon) {
-	            polygon.data([lasso.coordinates])
-	                .attr('d', function(d) { return 'M' + d.join(' L') + ' Z'; });
+	        if (c <= 0xFFFF || c >= 0x110000) {
+	          c = null;
 	        }
+	      }
 	    }
 
+	    if (c === null) {
+	      c = 0xFFFD;
+	      bytesPerSequence = 1;
+	    } else if (c > 0xFFFF) {
+	      c -= 0x10000;
+	      str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
+	      c = 0xDC00 | c & 0x3FF;
+	    }
 
-	    lasso.extent = function () {
-	        return lasso.coordinates.reduce(function(extent, point) {
-	            return extent.extend(geoExtent(point));
-	        }, geoExtent());
-	    };
+	    str += String.fromCharCode(c);
+	    i += bytesPerSequence;
+	  }
 
+	  return str;
+	}
 
-	    lasso.p = function(_) {
-	        if (!arguments.length) { return lasso; }
-	        lasso.coordinates.push(_);
-	        draw();
-	        return lasso;
-	    };
+	function readUtf8TextDecoder(buf, pos, end) {
+	  return utf8TextDecoder.decode(buf.subarray(pos, end));
+	}
 
+	function writeUtf8(buf, str, pos) {
+	  for (var i = 0, c, lead; i < str.length; i++) {
+	    c = str.charCodeAt(i); // code point
+
+	    if (c > 0xD7FF && c < 0xE000) {
+	      if (lead) {
+	        if (c < 0xDC00) {
+	          buf[pos++] = 0xEF;
+	          buf[pos++] = 0xBF;
+	          buf[pos++] = 0xBD;
+	          lead = c;
+	          continue;
+	        } else {
+	          c = lead - 0xD800 << 10 | c - 0xDC00 | 0x10000;
+	          lead = null;
+	        }
+	      } else {
+	        if (c > 0xDBFF || i + 1 === str.length) {
+	          buf[pos++] = 0xEF;
+	          buf[pos++] = 0xBF;
+	          buf[pos++] = 0xBD;
+	        } else {
+	          lead = c;
+	        }
 
-	    lasso.close = function() {
-	        if (group) {
-	            group.call(uiToggle(false, function() {
-	                select(this).remove();
-	            }));
+	        continue;
+	      }
+	    } else if (lead) {
+	      buf[pos++] = 0xEF;
+	      buf[pos++] = 0xBF;
+	      buf[pos++] = 0xBD;
+	      lead = null;
+	    }
+
+	    if (c < 0x80) {
+	      buf[pos++] = c;
+	    } else {
+	      if (c < 0x800) {
+	        buf[pos++] = c >> 0x6 | 0xC0;
+	      } else {
+	        if (c < 0x10000) {
+	          buf[pos++] = c >> 0xC | 0xE0;
+	        } else {
+	          buf[pos++] = c >> 0x12 | 0xF0;
+	          buf[pos++] = c >> 0xC & 0x3F | 0x80;
 	        }
-	        context.container().classed('lasso', false);
-	    };
 
+	        buf[pos++] = c >> 0x6 & 0x3F | 0x80;
+	      }
 
-	    return lasso;
+	      buf[pos++] = c & 0x3F | 0x80;
+	    }
+	  }
+
+	  return pos;
 	}
 
-	function behaviorLasso(context) {
+	var vectorTile = {};
 
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	var pointGeometry = Point$1;
+	/**
+	 * A standalone point geometry with useful accessor, comparison, and
+	 * modification methods.
+	 *
+	 * @class Point
+	 * @param {Number} x the x-coordinate. this could be longitude or screen
+	 * pixels, or any other sort of unit.
+	 * @param {Number} y the y-coordinate. this could be latitude or screen
+	 * pixels, or any other sort of unit.
+	 * @example
+	 * var point = new Point(-77, 38);
+	 */
 
-	    var behavior = function(selection) {
-	        var lasso;
+	function Point$1(x, y) {
+	  this.x = x;
+	  this.y = y;
+	}
 
+	Point$1.prototype = {
+	  /**
+	   * Clone this point, returning a new point that can be modified
+	   * without affecting the old one.
+	   * @return {Point} the clone
+	   */
+	  clone: function clone() {
+	    return new Point$1(this.x, this.y);
+	  },
 
-	        function pointerdown() {
-	            var button = 0;  // left
-	            if (event.button === button && event.shiftKey === true) {
-	                lasso = null;
+	  /**
+	   * Add this point's x & y coordinates to another point,
+	   * yielding a new point.
+	   * @param {Point} p the other point
+	   * @return {Point} output point
+	   */
+	  add: function add(p) {
+	    return this.clone()._add(p);
+	  },
 
-	                select(window)
-	                    .on(_pointerPrefix + 'move.lasso', pointermove)
-	                    .on(_pointerPrefix + 'up.lasso', pointerup);
+	  /**
+	   * Subtract this point's x & y coordinates to from point,
+	   * yielding a new point.
+	   * @param {Point} p the other point
+	   * @return {Point} output point
+	   */
+	  sub: function sub(p) {
+	    return this.clone()._sub(p);
+	  },
 
-	                event.stopPropagation();
-	            }
-	        }
+	  /**
+	   * Multiply this point's x & y coordinates by point,
+	   * yielding a new point.
+	   * @param {Point} p the other point
+	   * @return {Point} output point
+	   */
+	  multByPoint: function multByPoint(p) {
+	    return this.clone()._multByPoint(p);
+	  },
 
+	  /**
+	   * Divide this point's x & y coordinates by point,
+	   * yielding a new point.
+	   * @param {Point} p the other point
+	   * @return {Point} output point
+	   */
+	  divByPoint: function divByPoint(p) {
+	    return this.clone()._divByPoint(p);
+	  },
 
-	        function pointermove() {
-	            if (!lasso) {
-	                lasso = uiLasso(context);
-	                context.surface().call(lasso);
-	            }
+	  /**
+	   * Multiply this point's x & y coordinates by a factor,
+	   * yielding a new point.
+	   * @param {Point} k factor
+	   * @return {Point} output point
+	   */
+	  mult: function mult(k) {
+	    return this.clone()._mult(k);
+	  },
 
-	            lasso.p(context.map().mouse());
-	        }
+	  /**
+	   * Divide this point's x & y coordinates by a factor,
+	   * yielding a new point.
+	   * @param {Point} k factor
+	   * @return {Point} output point
+	   */
+	  div: function div(k) {
+	    return this.clone()._div(k);
+	  },
 
+	  /**
+	   * Rotate this point around the 0, 0 origin by an angle a,
+	   * given in radians
+	   * @param {Number} a angle to rotate around, in radians
+	   * @return {Point} output point
+	   */
+	  rotate: function rotate(a) {
+	    return this.clone()._rotate(a);
+	  },
 
-	        function normalize(a, b) {
-	            return [
-	                [Math.min(a[0], b[0]), Math.min(a[1], b[1])],
-	                [Math.max(a[0], b[0]), Math.max(a[1], b[1])]
-	            ];
-	        }
+	  /**
+	   * Rotate this point around p point by an angle a,
+	   * given in radians
+	   * @param {Number} a angle to rotate around, in radians
+	   * @param {Point} p Point to rotate around
+	   * @return {Point} output point
+	   */
+	  rotateAround: function rotateAround(a, p) {
+	    return this.clone()._rotateAround(a, p);
+	  },
 
+	  /**
+	   * Multiply this point by a 4x1 transformation matrix
+	   * @param {Array<Number>} m transformation matrix
+	   * @return {Point} output point
+	   */
+	  matMult: function matMult(m) {
+	    return this.clone()._matMult(m);
+	  },
 
-	        function lassoed() {
-	            if (!lasso) { return []; }
+	  /**
+	   * Calculate this point but as a unit vector from 0, 0, meaning
+	   * that the distance from the resulting point to the 0, 0
+	   * coordinate will be equal to 1 and the angle from the resulting
+	   * point to the 0, 0 coordinate will be the same as before.
+	   * @return {Point} unit vector point
+	   */
+	  unit: function unit() {
+	    return this.clone()._unit();
+	  },
 
-	            var graph = context.graph();
-	            var limitToNodes;
+	  /**
+	   * Compute a perpendicular point, where the new y coordinate
+	   * is the old x coordinate and the new x coordinate is the old y
+	   * coordinate multiplied by -1
+	   * @return {Point} perpendicular point
+	   */
+	  perp: function perp() {
+	    return this.clone()._perp();
+	  },
 
-	            if (context.map().editableDataEnabled(true /* skipZoomCheck */) && context.map().isInWideSelection()) {
-	                // only select from the visible nodes
-	                limitToNodes = new Set(utilGetAllNodes(context.selectedIDs(), graph));
-	            } else if (!context.map().editableDataEnabled()) {
-	                return [];
-	            }
+	  /**
+	   * Return a version of this point with the x & y coordinates
+	   * rounded to integers.
+	   * @return {Point} rounded point
+	   */
+	  round: function round() {
+	    return this.clone()._round();
+	  },
 
-	            var bounds = lasso.extent().map(context.projection.invert);
-	            var extent = geoExtent(normalize(bounds[0], bounds[1]));
+	  /**
+	   * Return the magitude of this point: this is the Euclidean
+	   * distance from the 0, 0 coordinate to this point's x and y
+	   * coordinates.
+	   * @return {Number} magnitude
+	   */
+	  mag: function mag() {
+	    return Math.sqrt(this.x * this.x + this.y * this.y);
+	  },
 
-	            var intersects = context.history().intersects(extent).filter(function(entity) {
-	                return entity.type === 'node' &&
-	                    (!limitToNodes || limitToNodes.has(entity)) &&
-	                    geoPointInPolygon(context.projection(entity.loc), lasso.coordinates) &&
-	                    !context.features().isHidden(entity, graph, entity.geometry(graph));
-	            });
+	  /**
+	   * Judge whether this point is equal to another point, returning
+	   * true or false.
+	   * @param {Point} other the other point
+	   * @return {boolean} whether the points are equal
+	   */
+	  equals: function equals(other) {
+	    return this.x === other.x && this.y === other.y;
+	  },
 
-	            // sort the lassoed nodes as best we can
-	            intersects.sort(function(node1, node2) {
-	                var parents1 = graph.parentWays(node1);
-	                var parents2 = graph.parentWays(node2);
-	                if (parents1.length && parents2.length) {
-	                    // both nodes are vertices
-
-	                    var sharedParents = utilArrayIntersection(parents1, parents2);
-	                    if (sharedParents.length) {
-	                        var sharedParentNodes = sharedParents[0].nodes;
-	                        // vertices are members of the same way; sort them in their listed order
-	                        return sharedParentNodes.indexOf(node1.id) -
-	                            sharedParentNodes.indexOf(node2.id);
-	                    } else {
-	                        // vertices do not share a way; group them by their respective parent ways
-	                        return parseFloat(parents1[0].id.slice(1)) -
-	                            parseFloat(parents2[0].id.slice(1));
-	                    }
+	  /**
+	   * Calculate the distance from this point to another point
+	   * @param {Point} p the other point
+	   * @return {Number} distance
+	   */
+	  dist: function dist(p) {
+	    return Math.sqrt(this.distSqr(p));
+	  },
 
-	                } else if (parents1.length || parents2.length) {
-	                    // only one node is a vertex; sort standalone points before vertices
-	                    return parents1.length - parents2.length;
-	                }
-	                // both nodes are standalone points; sort left to right
-	                return node1.loc[0] - node2.loc[0];
-	            });
+	  /**
+	   * Calculate the distance from this point to another point,
+	   * without the square root step. Useful if you're comparing
+	   * relative distances.
+	   * @param {Point} p the other point
+	   * @return {Number} distance
+	   */
+	  distSqr: function distSqr(p) {
+	    var dx = p.x - this.x,
+	        dy = p.y - this.y;
+	    return dx * dx + dy * dy;
+	  },
 
-	            return intersects.map(function(entity) { return entity.id; });
-	        }
+	  /**
+	   * Get the angle from the 0, 0 coordinate to this point, in radians
+	   * coordinates.
+	   * @return {Number} angle
+	   */
+	  angle: function angle() {
+	    return Math.atan2(this.y, this.x);
+	  },
 
+	  /**
+	   * Get the angle from this point to another point, in radians
+	   * @param {Point} b the other point
+	   * @return {Number} angle
+	   */
+	  angleTo: function angleTo(b) {
+	    return Math.atan2(this.y - b.y, this.x - b.x);
+	  },
 
-	        function pointerup() {
-	            select(window)
-	                .on(_pointerPrefix + 'move.lasso', null)
-	                .on(_pointerPrefix + 'up.lasso', null);
+	  /**
+	   * Get the angle between this point and another point, in radians
+	   * @param {Point} b the other point
+	   * @return {Number} angle
+	   */
+	  angleWith: function angleWith(b) {
+	    return this.angleWithSep(b.x, b.y);
+	  },
 
-	            if (!lasso) { return; }
+	  /*
+	   * Find the angle of the two vectors, solving the formula for
+	   * the cross product a x b = |a||b|sin(θ) for θ.
+	   * @param {Number} x the x-coordinate
+	   * @param {Number} y the y-coordinate
+	   * @return {Number} the angle in radians
+	   */
+	  angleWithSep: function angleWithSep(x, y) {
+	    return Math.atan2(this.x * y - this.y * x, this.x * x + this.y * y);
+	  },
+	  _matMult: function _matMult(m) {
+	    var x = m[0] * this.x + m[1] * this.y,
+	        y = m[2] * this.x + m[3] * this.y;
+	    this.x = x;
+	    this.y = y;
+	    return this;
+	  },
+	  _add: function _add(p) {
+	    this.x += p.x;
+	    this.y += p.y;
+	    return this;
+	  },
+	  _sub: function _sub(p) {
+	    this.x -= p.x;
+	    this.y -= p.y;
+	    return this;
+	  },
+	  _mult: function _mult(k) {
+	    this.x *= k;
+	    this.y *= k;
+	    return this;
+	  },
+	  _div: function _div(k) {
+	    this.x /= k;
+	    this.y /= k;
+	    return this;
+	  },
+	  _multByPoint: function _multByPoint(p) {
+	    this.x *= p.x;
+	    this.y *= p.y;
+	    return this;
+	  },
+	  _divByPoint: function _divByPoint(p) {
+	    this.x /= p.x;
+	    this.y /= p.y;
+	    return this;
+	  },
+	  _unit: function _unit() {
+	    this._div(this.mag());
 
-	            var ids = lassoed();
-	            lasso.close();
+	    return this;
+	  },
+	  _perp: function _perp() {
+	    var y = this.y;
+	    this.y = this.x;
+	    this.x = -y;
+	    return this;
+	  },
+	  _rotate: function _rotate(angle) {
+	    var cos = Math.cos(angle),
+	        sin = Math.sin(angle),
+	        x = cos * this.x - sin * this.y,
+	        y = sin * this.x + cos * this.y;
+	    this.x = x;
+	    this.y = y;
+	    return this;
+	  },
+	  _rotateAround: function _rotateAround(angle, p) {
+	    var cos = Math.cos(angle),
+	        sin = Math.sin(angle),
+	        x = p.x + cos * (this.x - p.x) - sin * (this.y - p.y),
+	        y = p.y + sin * (this.x - p.x) + cos * (this.y - p.y);
+	    this.x = x;
+	    this.y = y;
+	    return this;
+	  },
+	  _round: function _round() {
+	    this.x = Math.round(this.x);
+	    this.y = Math.round(this.y);
+	    return this;
+	  }
+	};
+	/**
+	 * Construct a point from an array if necessary, otherwise if the input
+	 * is already a Point, or an unknown type, return it unchanged
+	 * @param {Array<Number>|Point|*} a any kind of input value
+	 * @return {Point} constructed point, or passed-through value.
+	 * @example
+	 * // this
+	 * var point = Point.convert([0, 1]);
+	 * // is equivalent to
+	 * var point = new Point(0, 1);
+	 */
 
-	            if (ids.length) {
-	                context.enter(modeSelect(context, ids));
-	            }
-	        }
+	Point$1.convert = function (a) {
+	  if (a instanceof Point$1) {
+	    return a;
+	  }
 
-	        selection
-	            .on(_pointerPrefix + 'down.lasso', pointerdown);
-	    };
+	  if (Array.isArray(a)) {
+	    return new Point$1(a[0], a[1]);
+	  }
 
+	  return a;
+	};
 
-	    behavior.off = function(selection) {
-	        selection.on(_pointerPrefix + 'down.lasso', null);
-	    };
+	var Point = pointGeometry;
+	var vectortilefeature = VectorTileFeature$1;
 
+	function VectorTileFeature$1(pbf, end, extent, keys, values) {
+	  // Public
+	  this.properties = {};
+	  this.extent = extent;
+	  this.type = 0; // Private
 
-	    return behavior;
+	  this._pbf = pbf;
+	  this._geometry = -1;
+	  this._keys = keys;
+	  this._values = values;
+	  pbf.readFields(readFeature, this, end);
 	}
 
-	function modeBrowse(context) {
-	    var mode = {
-	        button: 'browse',
-	        id: 'browse',
-	        title: _t('modes.browse.title'),
-	        description: _t('modes.browse.description')
-	    };
-	    var sidebar;
-
-	    var _selectBehavior;
-	    var _behaviors = [];
-
-
-	    mode.selectBehavior = function(val) {
-	        if (!arguments.length) { return _selectBehavior; }
-	        _selectBehavior = val;
-	        return mode;
-	    };
-
-
-	    mode.enter = function() {
-	        if (!_behaviors.length) {
-	            if (!_selectBehavior) { _selectBehavior = behaviorSelect(context); }
-	            _behaviors = [
-	                behaviorPaste(context),
-	                behaviorHover(context).on('hover', context.ui().sidebar.hover),
-	                _selectBehavior,
-	                behaviorLasso(context),
-	                modeDragNode(context).behavior,
-	                modeDragNote(context).behavior
-	            ];
-	        }
-	        _behaviors.forEach(context.install);
+	function readFeature(tag, feature, pbf) {
+	  if (tag == 1) feature.id = pbf.readVarint();else if (tag == 2) readTag(pbf, feature);else if (tag == 3) feature.type = pbf.readVarint();else if (tag == 4) feature._geometry = pbf.pos;
+	}
 
-	        // Get focus on the body.
-	        if (document.activeElement && document.activeElement.blur) {
-	            document.activeElement.blur();
-	        }
+	function readTag(pbf, feature) {
+	  var end = pbf.readVarint() + pbf.pos;
 
-	        if (sidebar) {
-	            context.ui().sidebar.show(sidebar);
-	        } else {
-	            context.ui().sidebar.select(null);
-	        }
-	    };
+	  while (pbf.pos < end) {
+	    var key = feature._keys[pbf.readVarint()],
+	        value = feature._values[pbf.readVarint()];
 
+	    feature.properties[key] = value;
+	  }
+	}
 
-	    mode.exit = function() {
-	        context.ui().sidebar.hover.cancel();
-	        _behaviors.forEach(context.uninstall);
+	VectorTileFeature$1.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
 
-	        if (sidebar) {
-	            context.ui().sidebar.hide();
-	        }
-	    };
+	VectorTileFeature$1.prototype.loadGeometry = function () {
+	  var pbf = this._pbf;
+	  pbf.pos = this._geometry;
+	  var end = pbf.readVarint() + pbf.pos,
+	      cmd = 1,
+	      length = 0,
+	      x = 0,
+	      y = 0,
+	      lines = [],
+	      line;
 
+	  while (pbf.pos < end) {
+	    if (length <= 0) {
+	      var cmdLen = pbf.readVarint();
+	      cmd = cmdLen & 0x7;
+	      length = cmdLen >> 3;
+	    }
 
-	    mode.sidebar = function(_) {
-	        if (!arguments.length) { return sidebar; }
-	        sidebar = _;
-	        return mode;
-	    };
+	    length--;
 
+	    if (cmd === 1 || cmd === 2) {
+	      x += pbf.readSVarint();
+	      y += pbf.readSVarint();
 
-	    mode.operations = function() {
-	        return [operationPaste(context)];
-	    };
+	      if (cmd === 1) {
+	        // moveTo
+	        if (line) lines.push(line);
+	        line = [];
+	      }
 
+	      line.push(new Point(x, y));
+	    } else if (cmd === 7) {
+	      // Workaround for https://github.com/mapbox/mapnik-vector-tile/issues/90
+	      if (line) {
+	        line.push(line[0].clone()); // closePolygon
+	      }
+	    } else {
+	      throw new Error('unknown command ' + cmd);
+	    }
+	  }
 
-	    return mode;
-	}
+	  if (line) lines.push(line);
+	  return lines;
+	};
 
-	function behaviorAddWay(context) {
-	    var dispatch$1 = dispatch('start', 'startFromWay', 'startFromNode');
-	    var draw = behaviorDraw(context);
+	VectorTileFeature$1.prototype.bbox = function () {
+	  var pbf = this._pbf;
+	  pbf.pos = this._geometry;
+	  var end = pbf.readVarint() + pbf.pos,
+	      cmd = 1,
+	      length = 0,
+	      x = 0,
+	      y = 0,
+	      x1 = Infinity,
+	      x2 = -Infinity,
+	      y1 = Infinity,
+	      y2 = -Infinity;
 
-	    function behavior(surface) {
-	        draw.on('click', function() { dispatch$1.apply('start', this, arguments); })
-	            .on('clickWay', function() { dispatch$1.apply('startFromWay', this, arguments); })
-	            .on('clickNode', function() { dispatch$1.apply('startFromNode', this, arguments); })
-	            .on('cancel', behavior.cancel)
-	            .on('finish', behavior.cancel);
+	  while (pbf.pos < end) {
+	    if (length <= 0) {
+	      var cmdLen = pbf.readVarint();
+	      cmd = cmdLen & 0x7;
+	      length = cmdLen >> 3;
+	    }
 
-	        context.map()
-	            .dblclickZoomEnable(false);
+	    length--;
 
-	        surface.call(draw);
+	    if (cmd === 1 || cmd === 2) {
+	      x += pbf.readSVarint();
+	      y += pbf.readSVarint();
+	      if (x < x1) x1 = x;
+	      if (x > x2) x2 = x;
+	      if (y < y1) y1 = y;
+	      if (y > y2) y2 = y;
+	    } else if (cmd !== 7) {
+	      throw new Error('unknown command ' + cmd);
 	    }
+	  }
 
+	  return [x1, y1, x2, y2];
+	};
 
-	    behavior.off = function(surface) {
-	        surface.call(draw.off);
-	    };
+	VectorTileFeature$1.prototype.toGeoJSON = function (x, y, z) {
+	  var size = this.extent * Math.pow(2, z),
+	      x0 = this.extent * x,
+	      y0 = this.extent * y,
+	      coords = this.loadGeometry(),
+	      type = VectorTileFeature$1.types[this.type],
+	      i,
+	      j;
 
+	  function project(line) {
+	    for (var j = 0; j < line.length; j++) {
+	      var p = line[j],
+	          y2 = 180 - (p.y + y0) * 360 / size;
+	      line[j] = [(p.x + x0) * 360 / size - 180, 360 / Math.PI * Math.atan(Math.exp(y2 * Math.PI / 180)) - 90];
+	    }
+	  }
 
-	    behavior.cancel = function() {
-	        window.setTimeout(function() {
-	            context.map().dblclickZoomEnable(true);
-	        }, 1000);
+	  switch (this.type) {
+	    case 1:
+	      var points = [];
 
-	        context.enter(modeBrowse(context));
-	    };
+	      for (i = 0; i < coords.length; i++) {
+	        points[i] = coords[i][0];
+	      }
 
+	      coords = points;
+	      project(coords);
+	      break;
 
-	    return utilRebind(behavior, dispatch$1, 'on');
-	}
+	    case 2:
+	      for (i = 0; i < coords.length; i++) {
+	        project(coords[i]);
+	      }
 
-	function behaviorHash(context) {
+	      break;
 
-	    // cached window.location.hash
-	    var _cachedHash = null;
-	    // allowable latitude range
-	    var _latitudeLimit = 90 - 1e-8;
-
-	    function computedHashParameters() {
-	        var map = context.map();
-	        var center = map.center();
-	        var zoom = map.zoom();
-	        var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
-	        var oldParams = utilObjectOmit(utilStringQs(window.location.hash),
-	            ['comment', 'source', 'hashtags', 'walkthrough']
-	        );
-	        var newParams = {};
+	    case 3:
+	      coords = classifyRings(coords);
 
-	        delete oldParams.id;
-	        var selected = context.selectedIDs().filter(function(id) {
-	            return context.hasEntity(id);
-	        });
-	        if (selected.length) {
-	            newParams.id = selected.join(',');
+	      for (i = 0; i < coords.length; i++) {
+	        for (j = 0; j < coords[i].length; j++) {
+	          project(coords[i][j]);
 	        }
+	      }
 
-	        newParams.map = zoom.toFixed(2) +
-	            '/' + center[1].toFixed(precision) +
-	            '/' + center[0].toFixed(precision);
+	      break;
+	  }
 
-	        return Object.assign(oldParams, newParams);
-	    }
+	  if (coords.length === 1) {
+	    coords = coords[0];
+	  } else {
+	    type = 'Multi' + type;
+	  }
 
-	    function computedHash() {
-	        return '#' + utilQsString(computedHashParameters(), true);
-	    }
+	  var result = {
+	    type: "Feature",
+	    geometry: {
+	      type: type,
+	      coordinates: coords
+	    },
+	    properties: this.properties
+	  };
 
-	    function computedTitle(includeChangeCount) {
+	  if ('id' in this) {
+	    result.id = this.id;
+	  }
 
-	        var baseTitle = context.documentTitleBase() || 'iD';
-	        var contextual;
-	        var changeCount;
-	        var titleID;
+	  return result;
+	}; // classifies an array of rings into polygons with outer rings and holes
 
-	        var selected = context.selectedIDs().filter(function(id) {
-	            return context.hasEntity(id);
-	        });
-	        if (selected.length) {
-	            var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
-	            if (selected.length > 1 ) {
-	                contextual = _t('title.labeled_and_more', {
-	                    labeled: firstLabel,
-	                    count: (selected.length - 1).toString()
-	                });
-	            } else {
-	                contextual = firstLabel;
-	            }
-	            titleID = 'context';
-	        }
 
-	        if (includeChangeCount) {
-	            changeCount = context.history().difference().summary().length;
-	            if (changeCount > 0) {
-	                titleID = contextual ? 'changes_context' : 'changes';
-	            }
-	        }
+	function classifyRings(rings) {
+	  var len = rings.length;
+	  if (len <= 1) return [rings];
+	  var polygons = [],
+	      polygon,
+	      ccw;
 
-	        if (titleID) {
-	            return _t('title.format.' + titleID, {
-	                changes: changeCount,
-	                base: baseTitle,
-	                context: contextual
-	            });
-	        }
+	  for (var i = 0; i < len; i++) {
+	    var area = signedArea(rings[i]);
+	    if (area === 0) continue;
+	    if (ccw === undefined) ccw = area < 0;
 
-	        return baseTitle;
+	    if (ccw === area < 0) {
+	      if (polygon) polygons.push(polygon);
+	      polygon = [rings[i]];
+	    } else {
+	      polygon.push(rings[i]);
 	    }
+	  }
 
-	    function updateTitle(includeChangeCount) {
-	        if (!context.setsDocumentTitle()) { return; }
+	  if (polygon) polygons.push(polygon);
+	  return polygons;
+	}
 
-	        var newTitle = computedTitle(includeChangeCount);
-	        if (document.title !== newTitle) {
-	            document.title = newTitle;
-	        }
-	    }
+	function signedArea(ring) {
+	  var sum = 0;
 
-	    function updateHashIfNeeded() {
-	        if (context.inIntro()) { return; }
+	  for (var i = 0, len = ring.length, j = len - 1, p1, p2; i < len; j = i++) {
+	    p1 = ring[i];
+	    p2 = ring[j];
+	    sum += (p2.x - p1.x) * (p1.y + p2.y);
+	  }
 
-	        var latestHash = computedHash();
-	        if (_cachedHash !== latestHash) {
-	            _cachedHash = latestHash;
+	  return sum;
+	}
 
-	            // Update the URL hash without affecting the browser navigation stack,
-	            // though unavoidably creating a browser history entry
-	            window.history.replaceState(null, computedTitle(false /* includeChangeCount */), latestHash);
+	var VectorTileFeature = vectortilefeature;
+	var vectortilelayer = VectorTileLayer$1;
 
-	            // set the title we want displayed for the browser tab/window
-	            updateTitle(true /* includeChangeCount */);
-	        }
-	    }
+	function VectorTileLayer$1(pbf, end) {
+	  // Public
+	  this.version = 1;
+	  this.name = null;
+	  this.extent = 4096;
+	  this.length = 0; // Private
 
-	    var _throttledUpdate = throttle(updateHashIfNeeded, 500);
-	    var _throttledUpdateTitle = throttle(function() {
-	        updateTitle(true /* includeChangeCount */);
-	    }, 500);
+	  this._pbf = pbf;
+	  this._keys = [];
+	  this._values = [];
+	  this._features = [];
+	  pbf.readFields(readLayer, this, end);
+	  this.length = this._features.length;
+	}
 
-	    function hashchange() {
+	function readLayer(tag, layer, pbf) {
+	  if (tag === 15) layer.version = pbf.readVarint();else if (tag === 1) layer.name = pbf.readString();else if (tag === 5) layer.extent = pbf.readVarint();else if (tag === 2) layer._features.push(pbf.pos);else if (tag === 3) layer._keys.push(pbf.readString());else if (tag === 4) layer._values.push(readValueMessage(pbf));
+	}
 
-	        // ignore spurious hashchange events
-	        if (window.location.hash === _cachedHash) { return; }
+	function readValueMessage(pbf) {
+	  var value = null,
+	      end = pbf.readVarint() + pbf.pos;
 
-	        _cachedHash = window.location.hash;
+	  while (pbf.pos < end) {
+	    var tag = pbf.readVarint() >> 3;
+	    value = tag === 1 ? pbf.readString() : tag === 2 ? pbf.readFloat() : tag === 3 ? pbf.readDouble() : tag === 4 ? pbf.readVarint64() : tag === 5 ? pbf.readVarint() : tag === 6 ? pbf.readSVarint() : tag === 7 ? pbf.readBoolean() : null;
+	  }
 
-	        var q = utilStringQs(_cachedHash);
-	        var mapArgs = (q.map || '').split('/').map(Number);
+	  return value;
+	} // return feature `i` from this layer as a `VectorTileFeature`
 
-	        if (mapArgs.length < 3 || mapArgs.some(isNaN)) {
-	            // replace bogus hash
-	            updateHashIfNeeded();
 
-	        } else {
-	            // don't update if the new hash already reflects the state of iD
-	            if (_cachedHash === computedHash()) { return; }
+	VectorTileLayer$1.prototype.feature = function (i) {
+	  if (i < 0 || i >= this._features.length) throw new Error('feature index out of bounds');
+	  this._pbf.pos = this._features[i];
 
-	            var mode = context.mode();
+	  var end = this._pbf.readVarint() + this._pbf.pos;
 
-	            context.map().centerZoom([mapArgs[2], Math.min(_latitudeLimit, Math.max(-_latitudeLimit, mapArgs[1]))], mapArgs[0]);
+	  return new VectorTileFeature(this._pbf, end, this.extent, this._keys, this._values);
+	};
 
-	            if (q.id) {
-	                var ids = q.id.split(',').filter(function(id) {
-	                    return context.hasEntity(id);
-	                });
-	                var skip = mode && mode.id === 'select' && utilArrayIdentical(mode.selectedIDs(), ids);
-	                if (ids.length && !skip) {
-	                    context.enter(modeSelect(context, ids));
-	                    return;
-	                }
-	            }
+	var VectorTileLayer = vectortilelayer;
+	var vectortile = VectorTile$1;
 
-	            var center = context.map().center();
-	            var dist = geoSphericalDistance(center, [mapArgs[2], mapArgs[1]]);
-	            var maxdist = 500;
+	function VectorTile$1(pbf, end) {
+	  this.layers = pbf.readFields(readTile, {}, end);
+	}
 
-	            // Don't allow the hash location to change too much while drawing
-	            // This can happen if the user accidently hit the back button.  #3996
-	            if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
-	                context.enter(modeBrowse(context));
-	                return;
-	            }
-	        }
-	    }
+	function readTile(tag, layers, pbf) {
+	  if (tag === 3) {
+	    var layer = new VectorTileLayer(pbf, pbf.readVarint() + pbf.pos);
+	    if (layer.length) layers[layer.name] = layer;
+	  }
+	}
 
-	    function behavior() {
-	        context.map()
-	            .on('move.behaviorHash', _throttledUpdate);
+	var VectorTile = vectorTile.VectorTile = vectortile;
+	vectorTile.VectorTileFeature = vectortilefeature;
+	vectorTile.VectorTileLayer = vectortilelayer;
 
-	        context.history()
-	            .on('change.behaviorHash', _throttledUpdateTitle);
+	var accessToken = 'MLY|4100327730013843|5bb78b81720791946a9a7b956c57b7cf';
+	var apiUrl = 'https://graph.mapillary.com/';
+	var baseTileUrl = 'https://tiles.mapillary.com/maps/vtp';
+	var mapFeatureTileUrl = "".concat(baseTileUrl, "/mly_map_feature_point/2/{z}/{x}/{y}?access_token=").concat(accessToken);
+	var tileUrl = "".concat(baseTileUrl, "/mly1_public/2/{z}/{x}/{y}?access_token=").concat(accessToken);
+	var trafficSignTileUrl = "".concat(baseTileUrl, "/mly_map_feature_traffic_sign/2/{z}/{x}/{y}?access_token=").concat(accessToken);
+	var viewercss = 'mapillary-js/mapillary.css';
+	var viewerjs = 'mapillary-js/mapillary.js';
+	var minZoom$1 = 14;
+	var dispatch$4 = dispatch$8('change', 'loadedImages', 'loadedSigns', 'loadedMapFeatures', 'bearingChanged', 'imageChanged');
 
-	        context
-	            .on('enter.behaviorHash', _throttledUpdate);
+	var _loadViewerPromise$2;
 
-	        select(window)
-	            .on('hashchange.behaviorHash', hashchange);
+	var _mlyActiveImage;
 
-	        if (window.location.hash) {
-	            var q = utilStringQs(window.location.hash);
+	var _mlyCache;
 
-	            if (q.id) {
-	                //if (!context.history().hasRestorableChanges()) {
-	                    // targeting specific features: download, select, and zoom to them
-	                    context.zoomToEntity(q.id.split(',')[0], !q.map);
-	                //}
-	            }
+	var _mlyFallback = false;
 
-	            if (q.walkthrough === 'true') {
-	                behavior.startWalkthrough = true;
-	            }
+	var _mlyHighlightedDetection;
 
-	            if (q.map) {
-	                behavior.hadHash = true;
-	            }
+	var _mlyShowFeatureDetections = false;
+	var _mlyShowSignDetections = false;
 
-	            hashchange();
+	var _mlyViewer;
 
-	            updateTitle(false);
-	        }
-	    }
+	var _mlyViewerFilter = ['all']; // Load all data for the specified type from Mapillary vector tiles
 
-	    behavior.off = function() {
-	        _throttledUpdate.cancel();
-	        _throttledUpdateTitle.cancel();
+	function loadTiles$2(which, url, maxZoom, projection) {
+	  var tiler = utilTiler().zoomExtent([minZoom$1, maxZoom]).skipNullIsland(true);
+	  var tiles = tiler.getTiles(projection);
+	  tiles.forEach(function (tile) {
+	    loadTile$1(which, url, tile);
+	  });
+	} // Load all data for the specified type from one vector tile
+
+
+	function loadTile$1(which, url, tile) {
+	  var cache = _mlyCache.requests;
+	  var tileId = "".concat(tile.id, "-").concat(which);
+	  if (cache.loaded[tileId] || cache.inflight[tileId]) return;
+	  var controller = new AbortController();
+	  cache.inflight[tileId] = controller;
+	  var requestUrl = url.replace('{x}', tile.xyz[0]).replace('{y}', tile.xyz[1]).replace('{z}', tile.xyz[2]);
+	  fetch(requestUrl, {
+	    signal: controller.signal
+	  }).then(function (response) {
+	    if (!response.ok) {
+	      throw new Error(response.status + ' ' + response.statusText);
+	    }
+
+	    cache.loaded[tileId] = true;
+	    delete cache.inflight[tileId];
+	    return response.arrayBuffer();
+	  }).then(function (data) {
+	    if (!data) {
+	      throw new Error('No Data');
+	    }
+
+	    loadTileDataToCache(data, tile, which);
+
+	    if (which === 'images') {
+	      dispatch$4.call('loadedImages');
+	    } else if (which === 'signs') {
+	      dispatch$4.call('loadedSigns');
+	    } else if (which === 'points') {
+	      dispatch$4.call('loadedMapFeatures');
+	    }
+	  })["catch"](function () {
+	    cache.loaded[tileId] = true;
+	    delete cache.inflight[tileId];
+	  });
+	} // Load the data from the vector tile into cache
 
-	        context.map()
-	            .on('move.behaviorHash', null);
 
-	        context
-	            .on('enter.behaviorHash', null);
+	function loadTileDataToCache(data, tile, which) {
+	  var vectorTile = new VectorTile(new pbf(data));
+	  var features, cache, layer, i, feature, loc, d;
 
-	        select(window)
-	            .on('hashchange.behaviorHash', null);
+	  if (vectorTile.layers.hasOwnProperty('image')) {
+	    features = [];
+	    cache = _mlyCache.images;
+	    layer = vectorTile.layers.image;
 
-	        window.location.hash = '';
-	    };
+	    for (i = 0; i < layer.length; i++) {
+	      feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+	      loc = feature.geometry.coordinates;
+	      d = {
+	        loc: loc,
+	        captured_at: feature.properties.captured_at,
+	        ca: feature.properties.compass_angle,
+	        id: feature.properties.id,
+	        is_pano: feature.properties.is_pano,
+	        sequence_id: feature.properties.sequence_id
+	      };
+	      cache.forImageId[d.id] = d;
+	      features.push({
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      });
+	    }
 
-	    return behavior;
-	}
+	    if (cache.rtree) {
+	      cache.rtree.load(features);
+	    }
+	  }
 
-	/*
-	    iD.coreDifference represents the difference between two graphs.
-	    It knows how to calculate the set of entities that were
-	    created, modified, or deleted, and also contains the logic
-	    for recursively extending a difference to the complete set
-	    of entities that will require a redraw, taking into account
-	    child and parent relationships.
-	 */
-	function coreDifference(base, head) {
-	    var _changes = {};
-	    var _didChange = {};  // 'addition', 'deletion', 'geometry', 'properties'
-	    var _diff = {};
+	  if (vectorTile.layers.hasOwnProperty('sequence')) {
+	    features = [];
+	    cache = _mlyCache.sequences;
+	    layer = vectorTile.layers.sequence;
 
-	    function checkEntityID(id) {
-	        var h = head.entities[id];
-	        var b = base.entities[id];
+	    for (i = 0; i < layer.length; i++) {
+	      feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
 
-	        if (h === b) { return; }
-	        if (_changes[id]) { return; }
+	      if (cache.lineString[feature.properties.id]) {
+	        cache.lineString[feature.properties.id].push(feature);
+	      } else {
+	        cache.lineString[feature.properties.id] = [feature];
+	      }
+	    }
+	  }
 
-	        if (!h && b) {
-	            _changes[id] = { base: b, head: h };
-	            _didChange.deletion = true;
-	            return;
-	        }
-	        if (h && !b) {
-	            _changes[id] = { base: b, head: h };
-	            _didChange.addition = true;
-	            return;
-	        }
+	  if (vectorTile.layers.hasOwnProperty('point')) {
+	    features = [];
+	    cache = _mlyCache[which];
+	    layer = vectorTile.layers.point;
 
-	        if (h && b) {
-	            if (h.members && b.members && !fastDeepEqual(h.members, b.members)) {
-	                _changes[id] = { base: b, head: h };
-	                _didChange.geometry = true;
-	                _didChange.properties = true;
-	                return;
-	            }
-	            if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
-	                _changes[id] = { base: b, head: h };
-	                _didChange.geometry = true;
-	            }
-	            if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
-	                _changes[id] = { base: b, head: h };
-	                _didChange.geometry = true;
-	            }
-	            if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
-	                _changes[id] = { base: b, head: h };
-	                _didChange.properties = true;
-	            }
-	        }
+	    for (i = 0; i < layer.length; i++) {
+	      feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+	      loc = feature.geometry.coordinates;
+	      d = {
+	        loc: loc,
+	        id: feature.properties.id,
+	        first_seen_at: feature.properties.first_seen_at,
+	        last_seen_at: feature.properties.last_seen_at,
+	        value: feature.properties.value
+	      };
+	      features.push({
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      });
 	    }
 
-	    function load() {
-	        // HOT CODE: there can be many thousands of downloaded entities, so looping
-	        // through them all can become a performance bottleneck. Optimize by
-	        // resolving duplicates and using a basic `for` loop
-	        var ids = utilArrayUniq(Object.keys(head.entities).concat(Object.keys(base.entities)));
-	        for (var i = 0; i < ids.length; i++) {
-	            checkEntityID(ids[i]);
-	        }
+	    if (cache.rtree) {
+	      cache.rtree.load(features);
 	    }
-	    load();
-
+	  }
 
-	    _diff.length = function length() {
-	        return Object.keys(_changes).length;
-	    };
+	  if (vectorTile.layers.hasOwnProperty('traffic_sign')) {
+	    features = [];
+	    cache = _mlyCache[which];
+	    layer = vectorTile.layers.traffic_sign;
 
+	    for (i = 0; i < layer.length; i++) {
+	      feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+	      loc = feature.geometry.coordinates;
+	      d = {
+	        loc: loc,
+	        id: feature.properties.id,
+	        first_seen_at: feature.properties.first_seen_at,
+	        last_seen_at: feature.properties.last_seen_at,
+	        value: feature.properties.value
+	      };
+	      features.push({
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      });
+	    }
 
-	    _diff.changes = function changes() {
-	        return _changes;
-	    };
+	    if (cache.rtree) {
+	      cache.rtree.load(features);
+	    }
+	  }
+	} // Get data from the API
 
-	    _diff.didChange = _didChange;
 
+	function loadData(url) {
+	  return fetch(url).then(function (response) {
+	    if (!response.ok) {
+	      throw new Error(response.status + ' ' + response.statusText);
+	    }
 
-	    // pass true to include affected relation members
-	    _diff.extantIDs = function extantIDs(includeRelMembers) {
-	        var result = new Set();
-	        Object.keys(_changes).forEach(function(id) {
-	            if (_changes[id].head) {
-	                result.add(id);
-	            }
+	    return response.json();
+	  }).then(function (result) {
+	    if (!result) {
+	      return [];
+	    }
 
-	            var h = _changes[id].head;
-	            var b = _changes[id].base;
-	            var entity = h || b;
+	    return result.data || [];
+	  });
+	} // Partition viewport into higher zoom tiles
 
-	            if (includeRelMembers && entity.type === 'relation') {
-	                var mh = h ? h.members.map(function(m) { return m.id; }) : [];
-	                var mb = b ? b.members.map(function(m) { return m.id; }) : [];
-	                utilArrayUnion(mh, mb).forEach(function(memberID) {
-	                    if (head.hasEntity(memberID)) {
-	                        result.add(memberID);
-	                    }
-	                });
-	            }
-	        });
 
-	        return Array.from(result);
-	    };
+	function partitionViewport$2(projection) {
+	  var z = geoScaleToZoom(projection.scale());
+	  var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
 
+	  var tiler = utilTiler().zoomExtent([z2, z2]);
+	  return tiler.getTiles(projection).map(function (tile) {
+	    return tile.extent;
+	  });
+	} // Return no more than `limit` results per partition.
 
-	    _diff.modified = function modified() {
-	        var result = [];
-	        Object.values(_changes).forEach(function(change) {
-	            if (change.base && change.head) {
-	                result.push(change.head);
-	            }
-	        });
-	        return result;
-	    };
 
+	function searchLimited$2(limit, projection, rtree) {
+	  limit = limit || 5;
+	  return partitionViewport$2(projection).reduce(function (result, extent) {
+	    var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
+	      return d.data;
+	    });
+	    return found.length ? result.concat(found) : result;
+	  }, []);
+	}
 
-	    _diff.created = function created() {
-	        var result = [];
-	        Object.values(_changes).forEach(function(change) {
-	            if (!change.base && change.head) {
-	                result.push(change.head);
-	            }
-	        });
-	        return result;
-	    };
+	var serviceMapillary = {
+	  // Initialize Mapillary
+	  init: function init() {
+	    if (!_mlyCache) {
+	      this.reset();
+	    }
 
+	    this.event = utilRebind(this, dispatch$4, 'on');
+	  },
+	  // Reset cache and state
+	  reset: function reset() {
+	    if (_mlyCache) {
+	      Object.values(_mlyCache.requests.inflight).forEach(function (request) {
+	        request.abort();
+	      });
+	    }
 
-	    _diff.deleted = function deleted() {
-	        var result = [];
-	        Object.values(_changes).forEach(function(change) {
-	            if (change.base && !change.head) {
-	                result.push(change.base);
-	            }
-	        });
-	        return result;
+	    _mlyCache = {
+	      images: {
+	        rtree: new RBush(),
+	        forImageId: {}
+	      },
+	      image_detections: {
+	        forImageId: {}
+	      },
+	      signs: {
+	        rtree: new RBush()
+	      },
+	      points: {
+	        rtree: new RBush()
+	      },
+	      sequences: {
+	        rtree: new RBush(),
+	        lineString: {}
+	      },
+	      requests: {
+	        loaded: {},
+	        inflight: {}
+	      }
 	    };
+	    _mlyActiveImage = null;
+	  },
+	  // Get visible images
+	  images: function images(projection) {
+	    var limit = 5;
+	    return searchLimited$2(limit, projection, _mlyCache.images.rtree);
+	  },
+	  // Get visible traffic signs
+	  signs: function signs(projection) {
+	    var limit = 5;
+	    return searchLimited$2(limit, projection, _mlyCache.signs.rtree);
+	  },
+	  // Get visible map (point) features
+	  mapFeatures: function mapFeatures(projection) {
+	    var limit = 5;
+	    return searchLimited$2(limit, projection, _mlyCache.points.rtree);
+	  },
+	  // Get cached image by id
+	  cachedImage: function cachedImage(imageId) {
+	    return _mlyCache.images.forImageId[imageId];
+	  },
+	  // Get visible sequences
+	  sequences: function sequences(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    var sequenceIds = {};
+	    var lineStrings = [];
 
+	    _mlyCache.images.rtree.search(bbox).forEach(function (d) {
+	      if (d.data.sequence_id) {
+	        sequenceIds[d.data.sequence_id] = true;
+	      }
+	    });
 
-	    _diff.summary = function summary() {
-	        var relevant = {};
-
-	        var keys = Object.keys(_changes);
-	        for (var i = 0; i < keys.length; i++) {
-	            var change = _changes[keys[i]];
-
-	            if (change.head && change.head.geometry(head) !== 'vertex') {
-	                addEntity(change.head, head, change.base ? 'modified' : 'created');
+	    Object.keys(sequenceIds).forEach(function (sequenceId) {
+	      if (_mlyCache.sequences.lineString[sequenceId]) {
+	        lineStrings = lineStrings.concat(_mlyCache.sequences.lineString[sequenceId]);
+	      }
+	    });
+	    return lineStrings;
+	  },
+	  // Load images in the visible area
+	  loadImages: function loadImages(projection) {
+	    loadTiles$2('images', tileUrl, 14, projection);
+	  },
+	  // Load traffic signs in the visible area
+	  loadSigns: function loadSigns(projection) {
+	    loadTiles$2('signs', trafficSignTileUrl, 14, projection);
+	  },
+	  // Load map (point) features in the visible area
+	  loadMapFeatures: function loadMapFeatures(projection) {
+	    loadTiles$2('points', mapFeatureTileUrl, 14, projection);
+	  },
+	  // Return a promise that resolves when the image viewer (Mapillary JS) library has finished loading
+	  ensureViewerLoaded: function ensureViewerLoaded(context) {
+	    if (_loadViewerPromise$2) return _loadViewerPromise$2; // add mly-wrapper
 
-	            } else if (change.base && change.base.geometry(base) !== 'vertex') {
-	                addEntity(change.base, base, 'deleted');
+	    var wrap = context.container().select('.photoviewer').selectAll('.mly-wrapper').data([0]);
+	    wrap.enter().append('div').attr('id', 'ideditor-mly').attr('class', 'photo-wrapper mly-wrapper').classed('hide', true);
+	    var that = this;
+	    _loadViewerPromise$2 = new Promise(function (resolve, reject) {
+	      var loadedCount = 0;
 
-	            } else if (change.base && change.head) { // modified vertex
-	                var moved    = !fastDeepEqual(change.base.loc,  change.head.loc);
-	                var retagged = !fastDeepEqual(change.base.tags, change.head.tags);
+	      function loaded() {
+	        loadedCount += 1; // wait until both files are loaded
 
-	                if (moved) {
-	                    addParents(change.head);
-	                }
+	        if (loadedCount === 2) resolve();
+	      }
 
-	                if (retagged || (moved && change.head.hasInterestingTags())) {
-	                    addEntity(change.head, head, 'modified');
-	                }
+	      var head = select('head'); // load mapillary-viewercss
 
-	            } else if (change.head && change.head.hasInterestingTags()) { // created vertex
-	                addEntity(change.head, head, 'created');
+	      head.selectAll('#ideditor-mapillary-viewercss').data([0]).enter().append('link').attr('id', 'ideditor-mapillary-viewercss').attr('rel', 'stylesheet').attr('crossorigin', 'anonymous').attr('href', context.asset(viewercss)).on('load.serviceMapillary', loaded).on('error.serviceMapillary', function () {
+	        reject();
+	      }); // load mapillary-viewerjs
 
-	            } else if (change.base && change.base.hasInterestingTags()) { // deleted vertex
-	                addEntity(change.base, base, 'deleted');
-	            }
-	        }
+	      head.selectAll('#ideditor-mapillary-viewerjs').data([0]).enter().append('script').attr('id', 'ideditor-mapillary-viewerjs').attr('crossorigin', 'anonymous').attr('src', context.asset(viewerjs)).on('load.serviceMapillary', loaded).on('error.serviceMapillary', function () {
+	        reject();
+	      });
+	    })["catch"](function () {
+	      _loadViewerPromise$2 = null;
+	    }).then(function () {
+	      that.initViewer(context);
+	    });
+	    return _loadViewerPromise$2;
+	  },
+	  // Load traffic sign image sprites
+	  loadSignResources: function loadSignResources(context) {
+	    context.ui().svgDefs.addSprites(['mapillary-sprite'], false
+	    /* don't override colors */
+	    );
+	    return this;
+	  },
+	  // Load map (point) feature image sprites
+	  loadObjectResources: function loadObjectResources(context) {
+	    context.ui().svgDefs.addSprites(['mapillary-object-sprite'], false
+	    /* don't override colors */
+	    );
+	    return this;
+	  },
+	  // Remove previous detections in image viewer
+	  resetTags: function resetTags() {
+	    if (_mlyViewer && !_mlyFallback) {
+	      _mlyViewer.getComponent('tag').removeAll();
+	    }
+	  },
+	  // Show map feature detections in image viewer
+	  showFeatureDetections: function showFeatureDetections(value) {
+	    _mlyShowFeatureDetections = value;
 
-	        return Object.values(relevant);
+	    if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+	      this.resetTags();
+	    }
+	  },
+	  // Show traffic sign detections in image viewer
+	  showSignDetections: function showSignDetections(value) {
+	    _mlyShowSignDetections = value;
 
+	    if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+	      this.resetTags();
+	    }
+	  },
+	  // Apply filter to image viewer
+	  filterViewer: function filterViewer(context) {
+	    var showsPano = context.photos().showsPanoramic();
+	    var showsFlat = context.photos().showsFlat();
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var filter = ['all'];
+	    if (!showsPano) filter.push(['!=', 'cameraType', 'spherical']);
+	    if (!showsFlat && showsPano) filter.push(['==', 'pano', true]);
 
-	        function addEntity(entity, graph, changeType) {
-	            relevant[entity.id] = {
-	                entity: entity,
-	                graph: graph,
-	                changeType: changeType
-	            };
-	        }
+	    if (fromDate) {
+	      filter.push(['>=', 'capturedAt', new Date(fromDate).getTime()]);
+	    }
 
-	        function addParents(entity) {
-	            var parents = head.parentWays(entity);
-	            for (var j = parents.length - 1; j >= 0; j--) {
-	                var parent = parents[j];
-	                if (!(parent.id in relevant)) {
-	                    addEntity(parent, head, 'modified');
-	                }
-	            }
-	        }
-	    };
+	    if (toDate) {
+	      filter.push(['>=', 'capturedAt', new Date(toDate).getTime()]);
+	    }
 
+	    if (_mlyViewer) {
+	      _mlyViewer.setFilter(filter);
+	    }
 
-	    // returns complete set of entities that require a redraw
-	    //  (optionally within given `extent`)
-	    _diff.complete = function complete(extent) {
-	        var result = {};
-	        var id, change;
+	    _mlyViewerFilter = filter;
+	    return filter;
+	  },
+	  // Make the image viewer visible
+	  showViewer: function showViewer(context) {
+	    var wrap = context.container().select('.photoviewer').classed('hide', false);
+	    var isHidden = wrap.selectAll('.photo-wrapper.mly-wrapper.hide').size();
 
-	        for (id in _changes) {
-	            change = _changes[id];
+	    if (isHidden && _mlyViewer) {
+	      wrap.selectAll('.photo-wrapper:not(.mly-wrapper)').classed('hide', true);
+	      wrap.selectAll('.photo-wrapper.mly-wrapper').classed('hide', false);
 
-	            var h = change.head;
-	            var b = change.base;
-	            var entity = h || b;
-	            var i;
+	      _mlyViewer.resize();
+	    }
 
-	            if (extent &&
-	                (!h || !h.intersects(extent, head)) &&
-	                (!b || !b.intersects(extent, base)))
-	                { continue; }
+	    return this;
+	  },
+	  // Hide the image viewer and resets map markers
+	  hideViewer: function hideViewer(context) {
+	    _mlyActiveImage = null;
 
-	            result[id] = h;
+	    if (!_mlyFallback && _mlyViewer) {
+	      _mlyViewer.getComponent('sequence').stop();
+	    }
 
-	            if (entity.type === 'way') {
-	                var nh = h ? h.nodes : [];
-	                var nb = b ? b.nodes : [];
-	                var diff;
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(null);
+	    viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+	    this.updateUrlImage(null);
+	    dispatch$4.call('imageChanged');
+	    dispatch$4.call('loadedMapFeatures');
+	    dispatch$4.call('loadedSigns');
+	    return this.setStyles(context, null);
+	  },
+	  // Update the URL with current image id
+	  updateUrlImage: function updateUrlImage(imageId) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	                diff = utilArrayDifference(nh, nb);
-	                for (i = 0; i < diff.length; i++) {
-	                    result[diff[i]] = head.hasEntity(diff[i]);
-	                }
+	      if (imageId) {
+	        hash.photo = 'mapillary/' + imageId;
+	      } else {
+	        delete hash.photo;
+	      }
 
-	                diff = utilArrayDifference(nb, nh);
-	                for (i = 0; i < diff.length; i++) {
-	                    result[diff[i]] = head.hasEntity(diff[i]);
-	                }
-	            }
+	      window.location.replace('#' + utilQsString(hash, true));
+	    }
+	  },
+	  // Highlight the detection in the viewer that is related to the clicked map feature
+	  highlightDetection: function highlightDetection(detection) {
+	    if (detection) {
+	      _mlyHighlightedDetection = detection.id;
+	    }
 
-	            if (entity.type === 'relation' && entity.isMultipolygon()) {
-	                var mh = h ? h.members.map(function(m) { return m.id; }) : [];
-	                var mb = b ? b.members.map(function(m) { return m.id; }) : [];
-	                var ids = utilArrayUnion(mh, mb);
-	                for (i = 0; i < ids.length; i++) {
-	                    var member = head.hasEntity(ids[i]);
-	                    if (!member) { continue; }   // not downloaded
-	                    if (extent && !member.intersects(extent, head)) { continue; }   // not visible
-	                    result[ids[i]] = member;
-	                }
-	            }
+	    return this;
+	  },
+	  // Initialize image viewer (Mapillar JS)
+	  initViewer: function initViewer(context) {
+	    var that = this;
+	    if (!window.mapillary) return;
+	    var opts = {
+	      accessToken: accessToken,
+	      component: {
+	        cover: false,
+	        keyboard: false,
+	        tag: true
+	      },
+	      container: 'ideditor-mly'
+	    }; // Disable components requiring WebGL support
+
+	    if (!mapillary.isSupported() && mapillary.isFallbackSupported()) {
+	      _mlyFallback = true;
+	      opts.component = {
+	        cover: false,
+	        direction: false,
+	        imagePlane: false,
+	        keyboard: false,
+	        mouse: false,
+	        sequence: false,
+	        tag: false,
+	        image: true,
+	        // fallback
+	        navigation: true // fallback
 
-	            addParents(head.parentWays(entity), result);
-	            addParents(head.parentRelations(entity), result);
-	        }
+	      };
+	    }
 
-	        return result;
+	    _mlyViewer = new mapillary.Viewer(opts);
 
+	    _mlyViewer.on('image', imageChanged);
 
-	        function addParents(parents, result) {
-	            for (var i = 0; i < parents.length; i++) {
-	                var parent = parents[i];
-	                if (parent.id in result) { continue; }
+	    _mlyViewer.on('bearing', bearingChanged);
 
-	                result[parent.id] = parent;
-	                addParents(head.parentRelations(parent), result);
-	            }
-	        }
-	    };
+	    if (_mlyViewerFilter) {
+	      _mlyViewer.setFilter(_mlyViewerFilter);
+	    } // Register viewer resize handler
 
 
-	    return _diff;
-	}
+	    context.ui().photoviewer.on('resize.mapillary', function () {
+	      if (_mlyViewer) _mlyViewer.resize();
+	    }); // imageChanged: called after the viewer has changed images and is ready.
 
-	function coreTree(head) {
-	    // tree for entities
-	    var _rtree = new RBush();
-	    var _bboxes = {};
+	    function imageChanged(node) {
+	      that.resetTags();
+	      var image = node.image;
+	      that.setActiveImage(image);
+	      that.setStyles(context, null);
+	      var loc = [image.originalLngLat.lng, image.originalLngLat.lat];
+	      context.map().centerEase(loc);
+	      that.updateUrlImage(image.id);
 
-	    // maintain a separate tree for granular way segments
-	    var _segmentsRTree = new RBush();
-	    var _segmentsBBoxes = {};
-	    var _segmentsByWayId = {};
+	      if (_mlyShowFeatureDetections || _mlyShowSignDetections) {
+	        that.updateDetections(image.id, "".concat(apiUrl, "/").concat(image.id, "/detections?access_token=").concat(accessToken, "&fields=id,image,geometry,value"));
+	      }
 
-	    var tree = {};
+	      dispatch$4.call('imageChanged');
+	    } // bearingChanged: called when the bearing changes in the image viewer.
 
 
-	    function entityBBox(entity) {
-	        var bbox = entity.extent(head).bbox();
-	        bbox.id = entity.id;
-	        _bboxes[entity.id] = bbox;
-	        return bbox;
+	    function bearingChanged(e) {
+	      dispatch$4.call('bearingChanged', undefined, e);
+	    }
+	  },
+	  // Move to an image
+	  selectImage: function selectImage(context, imageId) {
+	    if (_mlyViewer && imageId) {
+	      _mlyViewer.moveTo(imageId)["catch"](function (e) {
+	        console.error('mly3', e); // eslint-disable-line no-console
+	      });
 	    }
 
+	    return this;
+	  },
+	  // Return the currently displayed image
+	  getActiveImage: function getActiveImage() {
+	    return _mlyActiveImage;
+	  },
+	  // Return a list of detection objects for the given id
+	  getDetections: function getDetections(id) {
+	    return loadData("".concat(apiUrl, "/").concat(id, "/detections?access_token=").concat(accessToken, "&fields=id,value,image"));
+	  },
+	  // Set the currently visible image
+	  setActiveImage: function setActiveImage(image) {
+	    if (image) {
+	      _mlyActiveImage = {
+	        ca: image.originalCompassAngle,
+	        id: image.id,
+	        loc: [image.originalLngLat.lng, image.originalLngLat.lat],
+	        is_pano: image.cameraType === 'spherical',
+	        sequence_id: image.sequenceId
+	      };
+	    } else {
+	      _mlyActiveImage = null;
+	    }
+	  },
+	  // Update the currently highlighted sequence and selected bubble.
+	  setStyles: function setStyles(context, hovered) {
+	    var hoveredImageId = hovered && hovered.id;
+	    var hoveredSequenceId = hovered && hovered.sequence_id;
+	    var selectedSequenceId = _mlyActiveImage && _mlyActiveImage.sequence_id;
+	    context.container().selectAll('.layer-mapillary .viewfield-group').classed('highlighted', function (d) {
+	      return d.sequence_id === selectedSequenceId || d.id === hoveredImageId;
+	    }).classed('hovered', function (d) {
+	      return d.id === hoveredImageId;
+	    });
+	    context.container().selectAll('.layer-mapillary .sequence').classed('highlighted', function (d) {
+	      return d.properties.id === hoveredSequenceId;
+	    }).classed('currentView', function (d) {
+	      return d.properties.id === selectedSequenceId;
+	    });
+	    return this;
+	  },
+	  // Get detections for the current image and shows them in the image viewer
+	  updateDetections: function updateDetections(imageId, url) {
+	    if (!_mlyViewer || _mlyFallback) return;
+	    if (!imageId) return;
+	    var cache = _mlyCache.image_detections;
+
+	    if (cache.forImageId[imageId]) {
+	      showDetections(_mlyCache.image_detections.forImageId[imageId]);
+	    } else {
+	      loadData(url).then(function (detections) {
+	        detections.forEach(function (detection) {
+	          if (!cache.forImageId[imageId]) {
+	            cache.forImageId[imageId] = [];
+	          }
 
-	    function segmentBBox(segment) {
-	        var extent = segment.extent(head);
-	        // extent can be null if the node entites aren't in the graph for some reason
-	        if (!extent) { return null; }
+	          cache.forImageId[imageId].push({
+	            geometry: detection.geometry,
+	            id: detection.id,
+	            image_id: imageId,
+	            value: detection.value
+	          });
+	        });
+	        showDetections(_mlyCache.image_detections.forImageId[imageId] || []);
+	      });
+	    } // Create a tag for each detection and shows it in the image viewer
 
-	        var bbox = extent.bbox();
-	        bbox.segment = segment;
-	        _segmentsBBoxes[segment.id] = bbox;
-	        return bbox;
-	    }
 
+	    function showDetections(detections) {
+	      var tagComponent = _mlyViewer.getComponent('tag');
 
-	    function removeEntity(entity) {
-	        _rtree.remove(_bboxes[entity.id]);
-	        delete _bboxes[entity.id];
+	      detections.forEach(function (data) {
+	        var tag = makeTag(data);
 
-	        if (_segmentsByWayId[entity.id]) {
-	            _segmentsByWayId[entity.id].forEach(function(segment) {
-	                _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
-	                delete _segmentsBBoxes[segment.id];
-	            });
-	            delete _segmentsByWayId[entity.id];
+	        if (tag) {
+	          tagComponent.add([tag]);
 	        }
-	    }
+	      });
+	    } // Create a Mapillary JS tag object
 
 
-	    function loadEntities(entities) {
-	        _rtree.load(entities.map(entityBBox));
+	    function makeTag(data) {
+	      var valueParts = data.value.split('--');
+	      if (!valueParts.length) return;
+	      var tag;
+	      var text;
+	      var color = 0xffffff;
 
-	        var segments = [];
-	        entities.forEach(function(entity) {
-	            if (entity.segments) {
-	                var entitySegments = entity.segments(head);
-	                // cache these to make them easy to remove later
-	                _segmentsByWayId[entity.id] = entitySegments;
-	                segments = segments.concat(entitySegments);
-	            }
-	        });
-	        if (segments.length) { _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean)); }
-	    }
+	      if (_mlyHighlightedDetection === data.id) {
+	        color = 0xffff00;
+	        text = valueParts[1];
 
+	        if (text === 'flat' || text === 'discrete' || text === 'sign') {
+	          text = valueParts[2];
+	        }
 
-	    function updateParents(entity, insertions, memo) {
-	        head.parentWays(entity).forEach(function(way) {
-	            if (_bboxes[way.id]) {
-	                removeEntity(way);
-	                insertions[way.id] = way;
-	            }
-	            updateParents(way, insertions, memo);
-	        });
+	        text = text.replace(/-/g, ' ');
+	        text = text.charAt(0).toUpperCase() + text.slice(1);
+	        _mlyHighlightedDetection = null;
+	      }
 
-	        head.parentRelations(entity).forEach(function(relation) {
-	            if (memo[entity.id]) { return; }
-	            memo[entity.id] = true;
-	            if (_bboxes[relation.id]) {
-	                removeEntity(relation);
-	                insertions[relation.id] = relation;
-	            }
-	            updateParents(relation, insertions, memo);
-	        });
-	    }
+	      var decodedGeometry = window.atob(data.geometry);
+	      var uintArray = new Uint8Array(decodedGeometry.length);
 
+	      for (var i = 0; i < decodedGeometry.length; i++) {
+	        uintArray[i] = decodedGeometry.charCodeAt(i);
+	      }
 
-	    tree.rebase = function(entities, force) {
-	        var insertions = {};
+	      var tile = new VectorTile(new pbf(uintArray.buffer));
+	      var layer = tile.layers['mpy-or'];
+	      var geometries = layer.feature(0).loadGeometry();
+	      var polygon = geometries.map(function (ring) {
+	        return ring.map(function (point) {
+	          return [point.x / layer.extent, point.y / layer.extent];
+	        });
+	      });
+	      tag = new mapillary.OutlineTag(data.id, new mapillary.PolygonGeometry(polygon[0]), {
+	        text: text,
+	        textColor: color,
+	        lineColor: color,
+	        lineWidth: 2,
+	        fillColor: color,
+	        fillOpacity: 0.3
+	      });
+	      return tag;
+	    }
+	  },
+	  // Return the current cache
+	  cache: function cache() {
+	    return _mlyCache;
+	  }
+	};
 
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-	            if (!entity.visible) { continue; }
+	function validationIssue(attrs) {
+	  this.type = attrs.type; // required - name of rule that created the issue (e.g. 'missing_tag')
 
-	            if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
-	                if (!force) {
-	                    continue;
-	                } else if (_bboxes[entity.id]) {
-	                    removeEntity(entity);
-	                }
-	            }
+	  this.subtype = attrs.subtype; // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')
 
-	            insertions[entity.id] = entity;
-	            updateParents(entity, insertions, {});
-	        }
+	  this.severity = attrs.severity; // required - 'warning' or 'error'
 
-	        loadEntities(Object.values(insertions));
+	  this.message = attrs.message; // required - function returning localized string
 
-	        return tree;
-	    };
+	  this.reference = attrs.reference; // optional - function(selection) to render reference information
 
+	  this.entityIds = attrs.entityIds; // optional - array of IDs of entities involved in the issue
 
-	    function updateToGraph(graph) {
-	        if (graph === head) { return; }
+	  this.loc = attrs.loc; // optional - [lon, lat] to zoom in on to see the issue
 
-	        var diff = coreDifference(head, graph);
+	  this.data = attrs.data; // optional - object containing extra data for the fixes
 
-	        head = graph;
+	  this.dynamicFixes = attrs.dynamicFixes; // optional - function(context) returning fixes
 
-	        var changed = diff.didChange;
-	        if (!changed.addition && !changed.deletion && !changed.geometry) { return; }
+	  this.hash = attrs.hash; // optional - string to further differentiate the issue
 
-	        var insertions = {};
+	  this.id = generateID.apply(this); // generated - see below
 
-	        if (changed.deletion) {
-	            diff.deleted().forEach(function(entity) {
-	                removeEntity(entity);
-	            });
-	        }
+	  this.key = generateKey.apply(this); // generated - see below (call after generating this.id)
 
-	        if (changed.geometry) {
-	            diff.modified().forEach(function(entity) {
-	                removeEntity(entity);
-	                insertions[entity.id] = entity;
-	                updateParents(entity, insertions, {});
-	            });
-	        }
+	  this.autoFix = null; // generated - if autofix exists, will be set below
+	  // A unique, deterministic string hash.
+	  // Issues with identical id values are considered identical.
 
-	        if (changed.addition) {
-	            diff.created().forEach(function(entity) {
-	                insertions[entity.id] = entity;
-	            });
-	        }
+	  function generateID() {
+	    var parts = [this.type];
 
-	        loadEntities(Object.values(insertions));
+	    if (this.hash) {
+	      // subclasses can pass in their own differentiator
+	      parts.push(this.hash);
 	    }
 
-	    // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
-	    tree.intersects = function(extent, graph) {
-	        updateToGraph(graph);
-	        return _rtree.search(extent.bbox())
-	            .map(function(bbox) { return graph.entity(bbox.id); });
-	    };
+	    if (this.subtype) {
+	      parts.push(this.subtype);
+	    } // include the entities this issue is for
+	    // (sort them so the id is deterministic)
 
-	    // returns an array of segment objects with bounding boxes overlapping `extent` for the given `graph`
-	    tree.waySegments = function(extent, graph) {
-	        updateToGraph(graph);
-	        return _segmentsRTree.search(extent.bbox())
-	            .map(function(bbox) { return bbox.segment; });
-	    };
 
+	    if (this.entityIds) {
+	      var entityKeys = this.entityIds.slice().sort();
+	      parts.push.apply(parts, entityKeys);
+	    }
 
-	    return tree;
-	}
+	    return parts.join(':');
+	  } // An identifier suitable for use as the second argument to d3.selection#data().
+	  // (i.e. this should change whenever the data needs to be refreshed)
 
-	function uiModal(selection, blocking) {
-	  var this$1 = this;
 
-	  var keybinding = utilKeybinding('modal');
-	  var previous = selection.select('div.modal');
-	  var animate = previous.empty();
+	  function generateKey() {
+	    return this.id + ':' + Date.now().toString(); // include time of creation
+	  }
 
-	  previous.transition()
-	    .duration(200)
-	    .style('opacity', 0)
-	    .remove();
+	  this.extent = function (resolver) {
+	    if (this.loc) {
+	      return geoExtent(this.loc);
+	    }
 
-	  var shaded = selection
-	    .append('div')
-	    .attr('class', 'shaded')
-	    .style('opacity', 0);
+	    if (this.entityIds && this.entityIds.length) {
+	      return this.entityIds.reduce(function (extent, entityId) {
+	        return extent.extend(resolver.entity(entityId).extent(resolver));
+	      }, geoExtent());
+	    }
 
-	  shaded.close = function () {
-	    shaded
-	      .transition()
-	      .duration(200)
-	      .style('opacity',0)
-	      .remove();
+	    return null;
+	  };
 
-	    modal
-	      .transition()
-	      .duration(200)
-	      .style('top','0px');
+	  this.fixes = function (context) {
+	    var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
+	    var issue = this;
 
-	    select(document)
-	      .call(keybinding.unbind);
-	  };
+	    if (issue.severity === 'warning') {
+	      // allow ignoring any issue that's not an error
+	      fixes.push(new validationIssueFix({
+	        title: _t.html('issues.fix.ignore_issue.title'),
+	        icon: 'iD-icon-close',
+	        onClick: function onClick() {
+	          context.validator().ignoreIssue(this.issue.id);
+	        }
+	      }));
+	    }
 
+	    fixes.forEach(function (fix) {
+	      // the id doesn't matter as long as it's unique to this issue/fix
+	      fix.id = fix.title; // add a reference to the issue for use in actions
 
-	  var modal = shaded
-	    .append('div')
-	    .attr('class', 'modal fillL');
+	      fix.issue = issue;
 
-	  if (!blocking) {
-	    shaded.on('click.remove-modal', function () {
-	      if (event.target === this$1) {
-	        shaded.close();
+	      if (fix.autoArgs) {
+	        issue.autoFix = fix;
 	      }
 	    });
-
-	    modal
-	      .append('button')
-	      .attr('class', 'close')
-	      .on('click', shaded.close)
-	      .call(svgIcon('#iD-icon-close'));
-
-	    keybinding
-	      .on('⌫', shaded.close)
-	      .on('⎋', shaded.close);
-
-	    select(document)
-	      .call(keybinding);
-	  }
-
-	  modal
-	    .append('div')
-	    .attr('class', 'content');
-
-	  if (animate) {
-	    shaded.transition().style('opacity', 1);
-	  } else {
-	    shaded.style('opacity', 1);
-	  }
-
-	  return shaded;
+	    return fixes;
+	  };
 	}
+	function validationIssueFix(attrs) {
+	  this.title = attrs.title; // Required
 
-	function uiLoading(context) {
-	  var _modalSelection = select(null);
-	  var _message = '';
-	  var _blocking = false;
-
-
-	  var loading = function (selection) {
-	    _modalSelection = uiModal(selection, _blocking);
-
-	    var loadertext = _modalSelection.select('.content')
-	      .classed('loading-modal', true)
-	      .append('div')
-	      .attr('class', 'modal-section fillL');
+	  this.onClick = attrs.onClick; // Optional - the function to run to apply the fix
 
-	    loadertext
-	      .append('img')
-	      .attr('class', 'loader')
-	      .attr('src', context.imagePath('loader-white.gif'));
+	  this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any
 
-	    loadertext
-	      .append('h3')
-	      .text(_message);
+	  this.icon = attrs.icon; // Optional - shows 'iD-icon-wrench' if not set
 
-	    _modalSelection.select('button.close')
-	      .attr('class', 'hide');
+	  this.entityIds = attrs.entityIds || []; // Optional - used for hover-higlighting.
 
-	    return loading;
-	  };
+	  this.autoArgs = attrs.autoArgs; // Optional - pass [actions, annotation] arglist if this fix can automatically run
 
+	  this.issue = null; // Generated link - added by validationIssue
+	}
 
-	  loading.message = function(val) {
-	    if (!arguments.length) { return _message; }
-	    _message = val;
-	    return loading;
-	  };
+	var buildRuleChecks = function buildRuleChecks() {
+	  return {
+	    equals: function equals(_equals) {
+	      return function (tags) {
+	        return Object.keys(_equals).every(function (k) {
+	          return _equals[k] === tags[k];
+	        });
+	      };
+	    },
+	    notEquals: function notEquals(_notEquals) {
+	      return function (tags) {
+	        return Object.keys(_notEquals).some(function (k) {
+	          return _notEquals[k] !== tags[k];
+	        });
+	      };
+	    },
+	    absence: function absence(_absence) {
+	      return function (tags) {
+	        return Object.keys(tags).indexOf(_absence) === -1;
+	      };
+	    },
+	    presence: function presence(_presence) {
+	      return function (tags) {
+	        return Object.keys(tags).indexOf(_presence) > -1;
+	      };
+	    },
+	    greaterThan: function greaterThan(_greaterThan) {
+	      var key = Object.keys(_greaterThan)[0];
+	      var value = _greaterThan[key];
+	      return function (tags) {
+	        return tags[key] > value;
+	      };
+	    },
+	    greaterThanEqual: function greaterThanEqual(_greaterThanEqual) {
+	      var key = Object.keys(_greaterThanEqual)[0];
+	      var value = _greaterThanEqual[key];
+	      return function (tags) {
+	        return tags[key] >= value;
+	      };
+	    },
+	    lessThan: function lessThan(_lessThan) {
+	      var key = Object.keys(_lessThan)[0];
+	      var value = _lessThan[key];
+	      return function (tags) {
+	        return tags[key] < value;
+	      };
+	    },
+	    lessThanEqual: function lessThanEqual(_lessThanEqual) {
+	      var key = Object.keys(_lessThanEqual)[0];
+	      var value = _lessThanEqual[key];
+	      return function (tags) {
+	        return tags[key] <= value;
+	      };
+	    },
+	    positiveRegex: function positiveRegex(_positiveRegex) {
+	      var tagKey = Object.keys(_positiveRegex)[0];
 
+	      var expression = _positiveRegex[tagKey].join('|');
 
-	  loading.blocking = function(val) {
-	    if (!arguments.length) { return _blocking; }
-	    _blocking = val;
-	    return loading;
-	  };
+	      var regex = new RegExp(expression);
+	      return function (tags) {
+	        return regex.test(tags[tagKey]);
+	      };
+	    },
+	    negativeRegex: function negativeRegex(_negativeRegex) {
+	      var tagKey = Object.keys(_negativeRegex)[0];
 
+	      var expression = _negativeRegex[tagKey].join('|');
 
-	  loading.close = function () {
-	    _modalSelection.remove();
+	      var regex = new RegExp(expression);
+	      return function (tags) {
+	        return !regex.test(tags[tagKey]);
+	      };
+	    }
 	  };
+	};
 
-
-	  loading.isShown = function () {
-	    return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
+	var buildLineKeys = function buildLineKeys() {
+	  return {
+	    highway: {
+	      rest_area: true,
+	      services: true
+	    },
+	    railway: {
+	      roundhouse: true,
+	      station: true,
+	      traverser: true,
+	      turntable: true,
+	      wash: true
+	    }
 	  };
+	};
 
+	var serviceMapRules = {
+	  init: function init() {
+	    this._ruleChecks = buildRuleChecks();
+	    this._validationRules = [];
+	    this._areaKeys = osmAreaKeys;
+	    this._lineKeys = buildLineKeys();
+	  },
+	  // list of rules only relevant to tag checks...
+	  filterRuleChecks: function filterRuleChecks(selector) {
+	    var _ruleChecks = this._ruleChecks;
+	    return Object.keys(selector).reduce(function (rules, key) {
+	      if (['geometry', 'error', 'warning'].indexOf(key) === -1) {
+	        rules.push(_ruleChecks[key](selector[key]));
+	      }
 
-	  return loading;
-	}
-
-	function coreHistory(context) {
-	    var dispatch$1 = dispatch('change', 'merge', 'restore', 'undone', 'redone');
-	    var lock = utilSessionMutex('lock');
+	      return rules;
+	    }, []);
+	  },
+	  // builds tagMap from mapcss-parse selector object...
+	  buildTagMap: function buildTagMap(selector) {
+	    var getRegexValues = function getRegexValues(regexes) {
+	      return regexes.map(function (regex) {
+	        return regex.replace(/\$|\^/g, '');
+	      });
+	    };
 
-	    // restorable if iD not open in another window/tab and a saved history exists in localStorage
-	    var _hasUnresolvedRestorableChanges = lock.lock() && !!corePreferences(getKey('saved_history'));
+	    var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
+	      var values;
+	      var isRegex = /regex/gi.test(key);
+	      var isEqual = /equals/gi.test(key);
 
-	    var duration = 150;
-	    var _imageryUsed = [];
-	    var _photoOverlaysUsed = [];
-	    var _checkpoints = {};
-	    var _pausedGraph;
-	    var _stack;
-	    var _index;
-	    var _tree;
+	      if (isRegex || isEqual) {
+	        Object.keys(selector[key]).forEach(function (selectorKey) {
+	          values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
 
+	          if (expectedTags.hasOwnProperty(selectorKey)) {
+	            values = values.concat(expectedTags[selectorKey]);
+	          }
 
-	    // internal _act, accepts list of actions and eased time
-	    function _act(actions, t) {
-	        actions = Array.prototype.slice.call(actions);
+	          expectedTags[selectorKey] = values;
+	        });
+	      } else if (/(greater|less)Than(Equal)?|presence/g.test(key)) {
+	        var tagKey = /presence/.test(key) ? selector[key] : Object.keys(selector[key])[0];
+	        values = [selector[key][tagKey]];
 
-	        var annotation;
-	        if (typeof actions[actions.length - 1] !== 'function') {
-	            annotation = actions.pop();
+	        if (expectedTags.hasOwnProperty(tagKey)) {
+	          values = values.concat(expectedTags[tagKey]);
 	        }
 
-	        var graph = _stack[_index].graph;
-	        for (var i = 0; i < actions.length; i++) {
-	            graph = actions[i](graph, t);
-	        }
+	        expectedTags[tagKey] = values;
+	      }
 
-	        return {
-	            graph: graph,
-	            annotation: annotation,
-	            imageryUsed: _imageryUsed,
-	            photoOverlaysUsed: _photoOverlaysUsed,
-	            transform: context.projection.transform(),
-	            selectedIDs: context.selectedIDs()
-	        };
-	    }
+	      return expectedTags;
+	    }, {});
+	    return tagMap;
+	  },
+	  // inspired by osmWay#isArea()
+	  inferGeometry: function inferGeometry(tagMap) {
+	    var _lineKeys = this._lineKeys;
+	    var _areaKeys = this._areaKeys;
 
+	    var keyValueDoesNotImplyArea = function keyValueDoesNotImplyArea(key) {
+	      return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
+	    };
 
-	    // internal _perform with eased time
-	    function _perform(args, t) {
-	        var previous = _stack[_index].graph;
-	        _stack = _stack.slice(0, _index + 1);
-	        var actionResult = _act(args, t);
-	        _stack.push(actionResult);
-	        _index++;
-	        return change(previous);
-	    }
+	    var keyValueImpliesLine = function keyValueImpliesLine(key) {
+	      return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
+	    };
 
+	    if (tagMap.hasOwnProperty('area')) {
+	      if (tagMap.area.indexOf('yes') > -1) {
+	        return 'area';
+	      }
 
-	    // internal _replace with eased time
-	    function _replace(args, t) {
-	        var previous = _stack[_index].graph;
-	        // assert(_index == _stack.length - 1)
-	        var actionResult = _act(args, t);
-	        _stack[_index] = actionResult;
-	        return change(previous);
+	      if (tagMap.area.indexOf('no') > -1) {
+	        return 'line';
+	      }
 	    }
 
+	    for (var key in tagMap) {
+	      if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
+	        return 'area';
+	      }
 
-	    // internal _overwrite with eased time
-	    function _overwrite(args, t) {
-	        var previous = _stack[_index].graph;
-	        if (_index > 0) {
-	            _index--;
-	            _stack.pop();
-	        }
-	        _stack = _stack.slice(0, _index + 1);
-	        var actionResult = _act(args, t);
-	        _stack.push(actionResult);
-	        _index++;
-	        return change(previous);
+	      if (key in _lineKeys && keyValueImpliesLine(key)) {
+	        return 'area';
+	      }
 	    }
 
-
-	    // determine difference and dispatch a change event
-	    function change(previous) {
-	        var difference = coreDifference(previous, history.graph());
-	        if (!_pausedGraph) {
-	            dispatch$1.call('change', this, difference);
+	    return 'line';
+	  },
+	  // adds from mapcss-parse selector check...
+	  addRule: function addRule(selector) {
+	    var rule = {
+	      // checks relevant to mapcss-selector
+	      checks: this.filterRuleChecks(selector),
+	      // true if all conditions for a tag error are true..
+	      matches: function matches(entity) {
+	        return this.checks.every(function (check) {
+	          return check(entity.tags);
+	        });
+	      },
+	      // borrowed from Way#isArea()
+	      inferredGeometry: this.inferGeometry(this.buildTagMap(selector), this._areaKeys),
+	      geometryMatches: function geometryMatches(entity, graph) {
+	        if (entity.type === 'node' || entity.type === 'relation') {
+	          return selector.geometry === entity.type;
+	        } else if (entity.type === 'way') {
+	          return this.inferredGeometry === entity.geometry(graph);
 	        }
-	        return difference;
-	    }
-
-
-	    // iD uses namespaced keys so multiple installations do not conflict
-	    function getKey(n) {
-	        return 'iD_' + window.location.origin + '_' + n;
-	    }
-
-
-	    var history = {
-
-	        graph: function() {
-	            return _stack[_index].graph;
-	        },
-
-
-	        tree: function() {
-	            return _tree;
-	        },
-
-
-	        base: function() {
-	            return _stack[0].graph;
-	        },
+	      },
+	      // when geometries match and tag matches are present, return a warning...
+	      findIssues: function findIssues(entity, graph, issues) {
+	        if (this.geometryMatches(entity, graph) && this.matches(entity)) {
+	          var severity = Object.keys(selector).indexOf('error') > -1 ? 'error' : 'warning';
+	          var _message = selector[severity];
+	          issues.push(new validationIssue({
+	            type: 'maprules',
+	            severity: severity,
+	            message: function message() {
+	              return _message;
+	            },
+	            entityIds: [entity.id]
+	          }));
+	        }
+	      }
+	    };
 
+	    this._validationRules.push(rule);
+	  },
+	  clearRules: function clearRules() {
+	    this._validationRules = [];
+	  },
+	  // returns validationRules...
+	  validationRules: function validationRules() {
+	    return this._validationRules;
+	  },
+	  // returns ruleChecks
+	  ruleChecks: function ruleChecks() {
+	    return this._ruleChecks;
+	  }
+	};
 
-	        merge: function(entities/*, extent*/) {
-	            var stack = _stack.map(function(state) { return state.graph; });
-	            _stack[0].graph.rebase(entities, stack, false);
-	            _tree.rebase(entities, false);
+	var apibase$2 = 'https://nominatim.openstreetmap.org/';
+	var _inflight$2 = {};
 
-	            dispatch$1.call('merge', this, entities);
-	        },
+	var _nominatimCache;
 
+	var serviceNominatim = {
+	  init: function init() {
+	    _inflight$2 = {};
+	    _nominatimCache = new RBush();
+	  },
+	  reset: function reset() {
+	    Object.values(_inflight$2).forEach(function (controller) {
+	      controller.abort();
+	    });
+	    _inflight$2 = {};
+	    _nominatimCache = new RBush();
+	  },
+	  countryCode: function countryCode(location, callback) {
+	    this.reverse(location, function (err, result) {
+	      if (err) {
+	        return callback(err);
+	      } else if (result.address) {
+	        return callback(null, result.address.country_code);
+	      } else {
+	        return callback('Unable to geocode', null);
+	      }
+	    });
+	  },
+	  reverse: function reverse(loc, callback) {
+	    var cached = _nominatimCache.search({
+	      minX: loc[0],
+	      minY: loc[1],
+	      maxX: loc[0],
+	      maxY: loc[1]
+	    });
 
-	        perform: function() {
-	            // complete any transition already in progress
-	            select(document).interrupt('history.perform');
+	    if (cached.length > 0) {
+	      if (callback) callback(null, cached[0].data);
+	      return;
+	    }
 
-	            var transitionable = false;
-	            var action0 = arguments[0];
+	    var params = {
+	      zoom: 13,
+	      format: 'json',
+	      addressdetails: 1,
+	      lat: loc[1],
+	      lon: loc[0]
+	    };
+	    var url = apibase$2 + 'reverse?' + utilQsString(params);
+	    if (_inflight$2[url]) return;
+	    var controller = new AbortController();
+	    _inflight$2[url] = controller;
+	    d3_json(url, {
+	      signal: controller.signal
+	    }).then(function (result) {
+	      delete _inflight$2[url];
 
-	            if (arguments.length === 1 ||
-	                (arguments.length === 2 && (typeof arguments[1] !== 'function'))) {
-	                transitionable = !!action0.transitionable;
-	            }
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
-	            if (transitionable) {
-	                var origArguments = arguments;
-	                select(document)
-	                    .transition('history.perform')
-	                    .duration(duration)
-	                    .ease(linear$1)
-	                    .tween('history.tween', function() {
-	                        return function(t) {
-	                            if (t < 1) { _overwrite([action0], t); }
-	                        };
-	                    })
-	                    .on('start', function() {
-	                        _perform([action0], 0);
-	                    })
-	                    .on('end interrupt', function() {
-	                        _overwrite(origArguments, 1);
-	                    });
+	      var extent = geoExtent(loc).padByMeters(200);
 
-	            } else {
-	                return _perform(arguments);
-	            }
-	        },
+	      _nominatimCache.insert(Object.assign(extent.bbox(), {
+	        data: result
+	      }));
 
+	      if (callback) callback(null, result);
+	    })["catch"](function (err) {
+	      delete _inflight$2[url];
+	      if (err.name === 'AbortError') return;
+	      if (callback) callback(err.message);
+	    });
+	  },
+	  search: function search(val, callback) {
+	    var searchVal = encodeURIComponent(val);
+	    var url = apibase$2 + 'search/' + searchVal + '?limit=10&format=json';
+	    if (_inflight$2[url]) return;
+	    var controller = new AbortController();
+	    _inflight$2[url] = controller;
+	    d3_json(url, {
+	      signal: controller.signal
+	    }).then(function (result) {
+	      delete _inflight$2[url];
 
-	        replace: function() {
-	            select(document).interrupt('history.perform');
-	            return _replace(arguments, 1);
-	        },
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
+	      if (callback) callback(null, result);
+	    })["catch"](function (err) {
+	      delete _inflight$2[url];
+	      if (err.name === 'AbortError') return;
+	      if (callback) callback(err.message);
+	    });
+	  }
+	};
 
-	        // Same as calling pop and then perform
-	        overwrite: function() {
-	            select(document).interrupt('history.perform');
-	            return _overwrite(arguments, 1);
-	        },
+	// for punction see https://stackoverflow.com/a/21224179
 
+	function simplify$1(str) {
+	  if (typeof str !== 'string') return '';
+	  return diacritics.remove(str.replace(/&/g, 'and').replace(/İ/ig, 'i') // for BİM, İşbank - #5017
+	  .replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>«»~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u2000-\u206f\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00-\u2e7f\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\ufeff\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g, '').toLowerCase());
+	}
 
-	        pop: function(n) {
-	            select(document).interrupt('history.perform');
+	var matchGroups$1 = {adult_gaming_centre:["amenity/casino","amenity/gambling","leisure/adult_gaming_centre"],beauty:["shop/beauty","shop/hairdresser_supply"],bed:["shop/bed","shop/furniture"],beverages:["shop/alcohol","shop/beer","shop/beverages","shop/wine"],camping:["leisure/park","tourism/camp_site","tourism/caravan_site"],car_parts:["shop/car_parts","shop/car_repair","shop/tires","shop/tyres"],clinic:["amenity/clinic","amenity/doctors","healthcare/clinic","healthcare/laboratory","healthcare/physiotherapist","healthcare/sample_collection","healthcare/dialysis"],confectionery:["shop/candy","shop/chocolate","shop/confectionery"],convenience:["shop/beauty","shop/chemist","shop/convenience","shop/cosmetics","shop/grocery","shop/newsagent","shop/perfumery"],coworking:["amenity/coworking_space","office/coworking","office/coworking_space"],dentist:["amenity/dentist","amenity/doctors","healthcare/dentist"],electronics:["office/telecommunication","shop/computer","shop/electronics","shop/hifi","shop/mobile","shop/mobile_phone","shop/telecommunication"],fabric:["shop/fabric","shop/haberdashery","shop/sewing"],fashion:["shop/accessories","shop/bag","shop/boutique","shop/clothes","shop/department_store","shop/fashion","shop/fashion_accessories","shop/sports","shop/shoes"],financial:["amenity/bank","office/accountant","office/financial","office/financial_advisor","office/tax_advisor","shop/tax"],fitness:["leisure/fitness_centre","leisure/fitness_center","leisure/sports_centre","leisure/sports_center"],food:["amenity/pub","amenity/bar","amenity/cafe","amenity/fast_food","amenity/ice_cream","amenity/restaurant","shop/bakery","shop/ice_cream","shop/pastry","shop/tea","shop/coffee"],fuel:["amenity/fuel","shop/gas","shop/convenience;gas","shop/gas;convenience"],gift:["shop/gift","shop/card","shop/cards","shop/stationery"],hardware:["shop/bathroom_furnishing","shop/carpet","shop/diy","shop/doityourself","shop/doors","shop/electrical","shop/flooring","shop/hardware","shop/hardware_store","shop/power_tools","shop/tool_hire","shop/tools","shop/trade"],health_food:["shop/health","shop/health_food","shop/herbalist","shop/nutrition_supplements"],hobby:["shop/electronics","shop/hobby","shop/books","shop/games","shop/collector","shop/toys","shop/model","shop/video_games","shop/anime"],hospital:["amenity/doctors","amenity/hospital","healthcare/hospital"],houseware:["shop/houseware","shop/interior_decoration"],lifeboat_station:["amenity/lifeboat_station","emergency/lifeboat_station","emergency/marine_rescue"],lodging:["tourism/hotel","tourism/motel"],money_transfer:["amenity/money_transfer","shop/money_transfer"],office_supplies:["shop/office_supplies","shop/stationary","shop/stationery"],outdoor:["shop/outdoor","shop/sports"],parcel_locker:["amenity/parcel_locker","amenity/vending_machine"],pharmacy:["amenity/doctors","amenity/pharmacy","healthcare/pharmacy"],playground:["amenity/theme_park","leisure/amusement_arcade","leisure/playground"],rental:["amenity/bicycle_rental","amenity/boat_rental","amenity/car_rental","amenity/truck_rental","amenity/vehicle_rental","shop/rental"],school:["amenity/childcare","amenity/college","amenity/kindergarten","amenity/language_school","amenity/prep_school","amenity/school","amenity/university"],storage:["shop/storage_units","shop/storage_rental"],substation:["power/station","power/substation","power/sub_station"],supermarket:["shop/food","shop/frozen_food","shop/greengrocer","shop/grocery","shop/supermarket","shop/wholesale"],variety_store:["shop/variety_store","shop/discount","shop/convenience"],vending:["amenity/vending_machine","shop/vending_machine"],weight_loss:["amenity/clinic","amenity/doctors","amenity/weight_clinic","healthcare/counselling","leisure/fitness_centre","office/therapist","shop/beauty","shop/diet","shop/food","shop/health_food","shop/herbalist","shop/nutrition","shop/nutrition_supplements","shop/weight_loss"],wholesale:["shop/wholesale","shop/supermarket","shop/department_store"]};
+	var matchGroupsJSON = {
+	matchGroups: matchGroups$1
+	};
 
-	            var previous = _stack[_index].graph;
-	            if (isNaN(+n) || +n < 0) {
-	                n = 1;
-	            }
-	            while (n-- > 0 && _index > 0) {
-	                _index--;
-	                _stack.pop();
-	            }
-	            return change(previous);
-	        },
+	var genericWords = ["^(barn|bazaa?r|bench|bou?tique|building|casa|church)$","^(baseball|basketball|football|soccer|softball|tennis(halle)?)\\s?(field|court)?$","^(club|green|out|ware)\\s?house$","^(driveway|el árbol|fountain|golf|government|graveyard)$","^(fixme|n\\s?\\/?\\s?a|name|no\\s?name|none|null|temporary|test|unknown)$","^(hofladen|librairie|magazine?|maison)$","^(mobile home|skate)?\\s?park$","^(obuwie|pond|pool|sale|shops?|sklep|stores?)$","^\\?+$","^private$","^tattoo( studio)?$","^windmill$","^церковная( лавка)?$"];
+	var genericWordsJSON = {
+	genericWords: genericWords
+	};
 
+	var trees$1 = {brands:{emoji:"🍔",mainTag:"brand:wikidata",sourceTags:["brand","name"],nameTags:{primary:"^(name|name:\\w+)$",alternate:"^(brand|brand:\\w+|operator|operator:\\w+|\\w+_name|\\w+_name:\\w+)$"}},flags:{emoji:"🚩",mainTag:"flag:wikidata",nameTags:{primary:"^(flag:name|flag:name:\\w+)$",alternate:"^(country|country:\\w+|flag|flag:\\w+|subject|subject:\\w+)$"}},operators:{emoji:"💼",mainTag:"operator:wikidata",sourceTags:["operator"],nameTags:{primary:"^(name|name:\\w+|operator|operator:\\w+)$",alternate:"^(brand|brand:\\w+|\\w+_name|\\w+_name:\\w+)$"}},transit:{emoji:"🚇",mainTag:"network:wikidata",sourceTags:["network"],nameTags:{primary:"^network$",alternate:"^(operator|operator:\\w+|network:\\w+|\\w+_name|\\w+_name:\\w+)$"}}};
+	var treesJSON = {
+	trees: trees$1
+	};
 
-	        // Back to the previous annotated state or _index = 0.
-	        undo: function() {
-	            select(document).interrupt('history.perform');
+	var matchGroups = matchGroupsJSON.matchGroups;
+	var trees = treesJSON.trees;
+	var Matcher = /*#__PURE__*/function () {
+	  //
+	  // `constructor`
+	  // initialize the genericWords regexes
+	  function Matcher() {
+	    var _this = this;
 
-	            var previousStack = _stack[_index];
-	            var previous = previousStack.graph;
-	            while (_index > 0) {
-	                _index--;
-	                if (_stack[_index].annotation) { break; }
-	            }
+	    _classCallCheck$1(this, Matcher);
 
-	            dispatch$1.call('undone', this, _stack[_index], previousStack);
-	            return change(previous);
-	        },
+	    // The `matchIndex` is a specialized structure that allows us to quickly answer
+	    //   _"Given a [key/value tagpair, name, location], what canonical items (brands etc) can match it?"_
+	    //
+	    // The index contains all valid combinations of k/v tagpairs and names
+	    // matchIndex:
+	    // {
+	    //   'k/v': {
+	    //     'primary':         Map (String 'nsimple' -> Set (itemIDs…),   // matches for tags like `name`, `name:xx`, etc.
+	    //     'alternate':       Map (String 'nsimple' -> Set (itemIDs…),   // matches for tags like `alt_name`, `brand`, etc.
+	    //     'excludeNamed':    Map (String 'pattern' -> RegExp),
+	    //     'excludeGeneric':  Map (String 'pattern' -> RegExp)
+	    //   },
+	    // }
+	    //
+	    // {
+	    //   'amenity/bank': {
+	    //     'primary': {
+	    //       'firstbank':              Set ("firstbank-978cca", "firstbank-9794e6", "firstbank-f17495", …),
+	    //       …
+	    //     },
+	    //     'alternate': {
+	    //       '1stbank':                Set ("firstbank-f17495"),
+	    //       …
+	    //     }
+	    //   },
+	    //   'shop/supermarket': {
+	    //     'primary': {
+	    //       'coop':                   Set ("coop-76454b", "coop-ebf2d9", "coop-36e991", …),
+	    //       'coopfood':               Set ("coopfood-a8278b", …),
+	    //       …
+	    //     },
+	    //     'alternate': {
+	    //       'coop':                   Set ("coopfood-a8278b", …),
+	    //       'federatedcooperatives':  Set ("coop-76454b", …),
+	    //       'thecooperative':         Set ("coopfood-a8278b", …),
+	    //       …
+	    //     }
+	    //   }
+	    // }
+	    //
+	    this.matchIndex = undefined; // The `genericWords` structure matches the contents of genericWords.json to instantiated RegExp objects
+	    // Map (String 'pattern' -> RegExp),
 
+	    this.genericWords = new Map();
+	    (genericWordsJSON.genericWords || []).forEach(function (s) {
+	      return _this.genericWords.set(s, new RegExp(s, 'i'));
+	    }); // The `itemLocation` structure maps itemIDs to locationSetIDs:
+	    // {
+	    //   'firstbank-f17495':  '+[first_bank_western_us.geojson]',
+	    //   'firstbank-978cca':  '+[first_bank_carolinas.geojson]',
+	    //   'coop-76454b':       '+[Q16]',
+	    //   'coopfood-a8278b':   '+[Q23666]',
+	    //   …
+	    // }
 
-	        // Forward to the next annotated state.
-	        redo: function() {
-	            select(document).interrupt('history.perform');
+	    this.itemLocation = undefined; // The `locationSets` structure maps locationSetIDs to *resolved* locationSets:
+	    // {
+	    //   '+[first_bank_western_us.geojson]':  GeoJSON {…},
+	    //   '+[first_bank_carolinas.geojson]':   GeoJSON {…},
+	    //   '+[Q16]':                            GeoJSON {…},
+	    //   '+[Q23666]':                         GeoJSON {…},
+	    //   …
+	    // }
 
-	            var previousStack = _stack[_index];
-	            var previous = previousStack.graph;
-	            var tryIndex = _index;
-	            while (tryIndex < _stack.length - 1) {
-	                tryIndex++;
-	                if (_stack[tryIndex].annotation) {
-	                    _index = tryIndex;
-	                    dispatch$1.call('redone', this, _stack[_index], previousStack);
-	                    break;
-	                }
-	            }
+	    this.locationSets = undefined; // The `locationIndex` is an instance of which-polygon spatial index for the locationSets.
 
-	            return change(previous);
-	        },
+	    this.locationIndex = undefined; // Array of match conflict pairs (currently unused)
 
+	    this.warnings = [];
+	  } //
+	  // `buildMatchIndex()`
+	  // Call this to prepare the matcher for use
+	  //
+	  // `data` needs to be an Object indexed on a 'tree/key/value' path.
+	  // (e.g. cache filled by `fileTree.read` or data found in `dist/nsi.json`)
+	  // {
+	  //    'brands/amenity/bank': { properties: {}, items: [ {}, {}, … ] },
+	  //    'brands/amenity/bar':  { properties: {}, items: [ {}, {}, … ] },
+	  //    …
+	  // }
+	  //
 
-	        pauseChangeDispatch: function() {
-	            if (!_pausedGraph) {
-	                _pausedGraph = _stack[_index].graph;
-	            }
-	        },
 
+	  _createClass$1(Matcher, [{
+	    key: "buildMatchIndex",
+	    value: function buildMatchIndex(data) {
+	      var that = this;
+	      if (that.matchIndex) return; // it was built already
+
+	      that.matchIndex = new Map();
+	      var seenTree = new Map(); // warn if the same [k, v, nsimple] appears in multiple trees - #5625
+
+	      Object.keys(data).forEach(function (tkv) {
+	        var category = data[tkv];
+	        var parts = tkv.split('/', 3); // tkv = "tree/key/value"
+
+	        var t = parts[0];
+	        var k = parts[1];
+	        var v = parts[2];
+	        var thiskv = "".concat(k, "/").concat(v);
+	        var tree = trees[t];
+	        var branch = that.matchIndex.get(thiskv);
+
+	        if (!branch) {
+	          branch = {
+	            primary: new Map(),
+	            alternate: new Map(),
+	            excludeGeneric: new Map(),
+	            excludeNamed: new Map()
+	          };
+	          that.matchIndex.set(thiskv, branch);
+	        } // ADD EXCLUSIONS
 
-	        resumeChangeDispatch: function() {
-	            if (_pausedGraph) {
-	                var previous = _pausedGraph;
-	                _pausedGraph = null;
-	                return change(previous);
-	            }
-	        },
 
+	        var properties = category.properties || {};
+	        var exclude = properties.exclude || {};
+	        (exclude.generic || []).forEach(function (s) {
+	          return branch.excludeGeneric.set(s, new RegExp(s, 'i'));
+	        });
+	        (exclude.named || []).forEach(function (s) {
+	          return branch.excludeNamed.set(s, new RegExp(s, 'i'));
+	        });
+	        var excludeRegexes = [].concat(_toConsumableArray(branch.excludeGeneric.values()), _toConsumableArray(branch.excludeNamed.values())); // ADD ITEMS
 
-	        undoAnnotation: function() {
-	            var i = _index;
-	            while (i >= 0) {
-	                if (_stack[i].annotation) { return _stack[i].annotation; }
-	                i--;
-	            }
-	        },
+	        var items = category.items;
+	        if (!Array.isArray(items) || !items.length) return; // Primary name patterns, match tags to take first
+	        //  e.g. `name`, `name:ru`
 
+	        var primaryName = new RegExp(tree.nameTags.primary, 'i'); // Alternate name patterns, match tags to consider after primary
+	        //  e.g. `alt_name`, `short_name`, `brand`, `brand:ru`, etc..
 
-	        redoAnnotation: function() {
-	            var i = _index + 1;
-	            while (i <= _stack.length - 1) {
-	                if (_stack[i].annotation) { return _stack[i].annotation; }
-	                i++;
-	            }
-	        },
+	        var alternateName = new RegExp(tree.nameTags.alternate, 'i'); // There are a few exceptions to the name matching regexes.
+	        // Usually a tag suffix contains a language code like `name:en`, `name:ru`
+	        // but we want to exclude things like `operator:type`, `name:etymology`, etc..
 
+	        var notName = /:(colou?r|type|forward|backward|left|right|etymology|pronunciation|wikipedia)$/i; // For certain categories we do not want to match generic KV pairs like `building/yes` or `amenity/yes`
 
-	        // Returns the entities from the active graph with bounding boxes
-	        // overlapping the given `extent`.
-	        intersects: function(extent) {
-	            return _tree.intersects(extent, _stack[_index].graph);
-	        },
+	        var skipGenericKV = skipGenericKVMatches(t, k, v); // We will collect the generic KV pairs anyway (for the purpose of filtering them out of matchTags)
 
+	        var genericKV = new Set(["".concat(k, "/yes"), "building/yes"]); // Collect alternate tagpairs for this kv category from matchGroups.
+	        // We might also pick up a few more generic KVs (like `shop/yes`)
 
-	        difference: function() {
-	            var base = _stack[0].graph;
-	            var head = _stack[_index].graph;
-	            return coreDifference(base, head);
-	        },
+	        var matchGroupKV = new Set();
+	        Object.values(matchGroups).forEach(function (matchGroup) {
+	          var inGroup = matchGroup.some(function (otherkv) {
+	            return otherkv === thiskv;
+	          });
+	          if (!inGroup) return;
+	          matchGroup.forEach(function (otherkv) {
+	            if (otherkv === thiskv) return; // skip self
 
+	            matchGroupKV.add(otherkv);
+	            var otherk = otherkv.split('/', 2)[0]; // we might pick up a `shop/yes`
 
-	        changes: function(action) {
-	            var base = _stack[0].graph;
-	            var head = _stack[_index].graph;
+	            genericKV.add("".concat(otherk, "/yes"));
+	          });
+	        }); // For each item, insert all [key, value, name] combinations into the match index
 
-	            if (action) {
-	                head = action(head);
-	            }
+	        items.forEach(function (item) {
+	          if (!item.id) return; // Automatically remove redundant `matchTags` - #3417
+	          // (i.e. This kv is already covered by matchGroups, so it doesn't need to be in `item.matchTags`)
 
-	            var difference = coreDifference(base, head);
+	          if (Array.isArray(item.matchTags) && item.matchTags.length) {
+	            item.matchTags = item.matchTags.filter(function (matchTag) {
+	              return !matchGroupKV.has(matchTag) && !genericKV.has(matchTag);
+	            });
+	            if (!item.matchTags.length) delete item.matchTags;
+	          } // key/value tagpairs to insert into the match index..
 
-	            return {
-	                modified: difference.modified(),
-	                created: difference.created(),
-	                deleted: difference.deleted()
-	            };
-	        },
 
+	          var kvTags = ["".concat(thiskv)].concat(item.matchTags || []);
 
-	        hasChanges: function() {
-	            return this.difference().length() > 0;
-	        },
+	          if (!skipGenericKV) {
+	            kvTags = kvTags.concat(Array.from(genericKV)); // #3454 - match some generic tags
+	          } // Index all the namelike tag values
 
 
-	        imageryUsed: function(sources) {
-	            if (sources) {
-	                _imageryUsed = sources;
-	                return history;
-	            } else {
-	                var s = new Set();
-	                _stack.slice(1, _index + 1).forEach(function(state) {
-	                    state.imageryUsed.forEach(function(source) {
-	                        if (source !== 'Custom') {
-	                            s.add(source);
-	                        }
-	                    });
-	                });
-	                return Array.from(s);
-	            }
-	        },
+	          Object.keys(item.tags).forEach(function (osmkey) {
+	            if (notName.test(osmkey)) return; // osmkey is not a namelike tag, skip
 
+	            var osmvalue = item.tags[osmkey];
+	            if (!osmvalue || excludeRegexes.some(function (regex) {
+	              return regex.test(osmvalue);
+	            })) return; // osmvalue missing or excluded
 
-	        photoOverlaysUsed: function(sources) {
-	            if (sources) {
-	                _photoOverlaysUsed = sources;
-	                return history;
-	            } else {
-	                var s = new Set();
-	                _stack.slice(1, _index + 1).forEach(function(state) {
-	                    if (state.photoOverlaysUsed && Array.isArray(state.photoOverlaysUsed)) {
-	                        state.photoOverlaysUsed.forEach(function(photoOverlay) {
-	                            s.add(photoOverlay);
-	                        });
-	                    }
-	                });
-	                return Array.from(s);
+	            if (primaryName.test(osmkey)) {
+	              kvTags.forEach(function (kv) {
+	                return insertName('primary', t, kv, simplify$1(osmvalue), item.id);
+	              });
+	            } else if (alternateName.test(osmkey)) {
+	              kvTags.forEach(function (kv) {
+	                return insertName('alternate', t, kv, simplify$1(osmvalue), item.id);
+	              });
 	            }
-	        },
+	          }); // Index `matchNames` after indexing all other names..
+
+	          var keepMatchNames = new Set();
+	          (item.matchNames || []).forEach(function (matchName) {
+	            // If this matchname isn't already indexed, add it to the alternate index
+	            var nsimple = simplify$1(matchName);
+	            kvTags.forEach(function (kv) {
+	              var branch = that.matchIndex.get(kv);
+	              var primaryLeaf = branch && branch.primary.get(nsimple);
+	              var alternateLeaf = branch && branch.alternate.get(nsimple);
+	              var inPrimary = primaryLeaf && primaryLeaf.has(item.id);
+	              var inAlternate = alternateLeaf && alternateLeaf.has(item.id);
+
+	              if (!inPrimary && !inAlternate) {
+	                insertName('alternate', t, kv, nsimple, item.id);
+	                keepMatchNames.add(matchName);
+	              }
+	            });
+	          }); // Automatically remove redundant `matchNames` - #3417
+	          // (i.e. This name got indexed some other way, so it doesn't need to be in `item.matchNames`)
 
+	          if (keepMatchNames.size) {
+	            item.matchNames = Array.from(keepMatchNames);
+	          } else {
+	            delete item.matchNames;
+	          }
+	        }); // each item
+	      }); // each tkv
+	      // Insert this item into the matchIndex
 
-	        // save the current history state
-	        checkpoint: function(key) {
-	            _checkpoints[key] = {
-	                stack: _stack,
-	                index: _index
-	            };
-	            return history;
-	        },
+	      function insertName(which, t, kv, nsimple, itemID) {
+	        if (!nsimple) {
+	          that.warnings.push("Warning: skipping empty ".concat(which, " name for item ").concat(t, "/").concat(kv, ": ").concat(itemID));
+	          return;
+	        }
 
+	        var branch = that.matchIndex.get(kv);
 
-	        // restore history state to a given checkpoint or reset completely
-	        reset: function(key) {
-	            if (key !== undefined && _checkpoints.hasOwnProperty(key)) {
-	                _stack = _checkpoints[key].stack;
-	                _index = _checkpoints[key].index;
-	            } else {
-	                _stack = [{graph: coreGraph()}];
-	                _index = 0;
-	                _tree = coreTree(_stack[0].graph);
-	                _checkpoints = {};
-	            }
-	            dispatch$1.call('change');
-	            return history;
-	        },
+	        if (!branch) {
+	          branch = {
+	            primary: new Map(),
+	            alternate: new Map(),
+	            excludeGeneric: new Map(),
+	            excludeNamed: new Map()
+	          };
+	          that.matchIndex.set(kv, branch);
+	        }
 
+	        var leaf = branch[which].get(nsimple);
 
-	        // `toIntroGraph()` is used to export the intro graph used by the walkthrough.
-	        //
-	        // To use it:
-	        //  1. Start the walkthrough.
-	        //  2. Get to a "free editing" tutorial step
-	        //  3. Make your edits to the walkthrough map
-	        //  4. In your browser dev console run:
-	        //        `id.history().toIntroGraph()`
-	        //  5. This outputs stringified JSON to the browser console
-	        //  6. Copy it to `data/intro_graph.json` and prettify it in your code editor
-	        toIntroGraph: function() {
-	            var nextID = { n: 0, r: 0, w: 0 };
-	            var permIDs = {};
-	            var graph = this.graph();
-	            var baseEntities = {};
-
-	            // clone base entities..
-	            Object.values(graph.base().entities).forEach(function(entity) {
-	                var copy = copyIntroEntity(entity);
-	                baseEntities[copy.id] = copy;
-	            });
+	        if (!leaf) {
+	          leaf = new Set();
+	          branch[which].set(nsimple, leaf);
+	        }
 
-	            // replace base entities with head entities..
-	            Object.keys(graph.entities).forEach(function(id) {
-	                var entity = graph.entities[id];
-	                if (entity) {
-	                    var copy = copyIntroEntity(entity);
-	                    baseEntities[copy.id] = copy;
-	                } else {
-	                    delete baseEntities[id];
-	                }
-	            });
+	        leaf.add(itemID); // insert
+	        // check for duplicates - #5625
 
-	            // swap temporary for permanent ids..
-	            Object.values(baseEntities).forEach(function(entity) {
-	                if (Array.isArray(entity.nodes)) {
-	                    entity.nodes = entity.nodes.map(function(node) {
-	                        return permIDs[node] || node;
-	                    });
-	                }
-	                if (Array.isArray(entity.members)) {
-	                    entity.members = entity.members.map(function(member) {
-	                        member.id = permIDs[member.id] || member.id;
-	                        return member;
-	                    });
-	                }
-	            });
+	        if (!/yes$/.test(kv)) {
+	          // ignore genericKV like amenity/yes, building/yes, etc
+	          var kvnsimple = "".concat(kv, "/").concat(nsimple);
+	          var existing = seenTree.get(kvnsimple);
 
-	            return JSON.stringify({ dataIntroGraph: baseEntities });
+	          if (existing && existing !== t) {
+	            var items = Array.from(leaf);
+	            that.warnings.push("Duplicate cache key \"".concat(kvnsimple, "\" in trees \"").concat(t, "\" and \"").concat(existing, "\", check items: ").concat(items));
+	            return;
+	          }
 
+	          seenTree.set(kvnsimple, t);
+	        }
+	      } // For certain categories we do not want to match generic KV pairs like `building/yes` or `amenity/yes`
 
-	            function copyIntroEntity(source) {
-	                var copy = utilObjectOmit(source, ['type', 'user', 'v', 'version', 'visible']);
 
-	                // Note: the copy is no longer an osmEntity, so it might not have `tags`
-	                if (copy.tags && !Object.keys(copy.tags)) {
-	                    delete copy.tags;
-	                }
+	      function skipGenericKVMatches(t, k, v) {
+	        return t === 'flags' || t === 'transit' || k === 'landuse' || v === 'atm' || v === 'bicycle_parking' || v === 'car_sharing' || v === 'caravan_site' || v === 'charging_station' || v === 'dog_park' || v === 'parking' || v === 'phone' || v === 'playground' || v === 'post_box' || v === 'public_bookcase' || v === 'recycling' || v === 'vending_machine';
+	      }
+	    } //
+	    // `buildLocationIndex()`
+	    // Call this to prepare a which-polygon location index.
+	    // This *resolves* all the locationSets into GeoJSON, which takes some time.
+	    // You can skip this step if you don't care about matching within a location.
+	    //
+	    // `data` needs to be an Object indexed on a 'tree/key/value' path.
+	    // (e.g. cache filled by `fileTree.read` or data found in `dist/nsi.json`)
+	    // {
+	    //    'brands/amenity/bank': { properties: {}, items: [ {}, {}, … ] },
+	    //    'brands/amenity/bar':  { properties: {}, items: [ {}, {}, … ] },
+	    //    …
+	    // }
+	    //
 
-	                if (Array.isArray(copy.loc)) {
-	                    copy.loc[0] = +copy.loc[0].toFixed(6);
-	                    copy.loc[1] = +copy.loc[1].toFixed(6);
-	                }
+	  }, {
+	    key: "buildLocationIndex",
+	    value: function buildLocationIndex(data, loco) {
+	      var that = this;
+	      if (that.locationIndex) return; // it was built already
+
+	      that.itemLocation = new Map();
+	      that.locationSets = new Map();
+	      Object.keys(data).forEach(function (tkv) {
+	        var items = data[tkv].items;
+	        if (!Array.isArray(items) || !items.length) return;
+	        items.forEach(function (item) {
+	          if (that.itemLocation.has(item.id)) return; // we've seen item id already - shouldn't be possible?
+
+	          var resolved;
+
+	          try {
+	            resolved = loco.resolveLocationSet(item.locationSet); // resolve a feature for this locationSet
+	          } catch (err) {
+	            console.warn("buildLocationIndex: ".concat(err.message)); // couldn't resolve
+	          }
 
-	                var match = source.id.match(/([nrw])-\d*/);  // temporary id
-	                if (match !== null) {
-	                    var nrw = match[1];
-	                    var permID;
-	                    do { permID = nrw + (++nextID[nrw]); }
-	                    while (baseEntities.hasOwnProperty(permID));
+	          if (!resolved || !resolved.id) return;
+	          that.itemLocation.set(item.id, resolved.id); // link it to the item
 
-	                    copy.id = permIDs[source.id] = permID;
-	                }
-	                return copy;
-	            }
-	        },
+	          if (that.locationSets.has(resolved.id)) return; // we've seen this locationSet feature before..
+	          // First time seeing this locationSet feature, make a copy and add to locationSet cache..
 
+	          var feature = _cloneDeep(resolved.feature);
 
-	        toJSON: function() {
-	            if (!this.hasChanges()) { return; }
+	          feature.id = resolved.id; // Important: always use the locationSet `id` (`+[Q30]`), not the feature `id` (`Q30`)
 
-	            var allEntities = {};
-	            var baseEntities = {};
-	            var base = _stack[0];
+	          feature.properties.id = resolved.id;
 
-	            var s = _stack.map(function(i) {
-	                var modified = [];
-	                var deleted = [];
+	          if (!feature.geometry.coordinates.length || !feature.properties.area) {
+	            console.warn("buildLocationIndex: locationSet ".concat(resolved.id, " for ").concat(item.id, " resolves to an empty feature:"));
+	            console.warn(JSON.stringify(feature));
+	            return;
+	          }
 
-	                Object.keys(i.graph.entities).forEach(function(id) {
-	                    var entity = i.graph.entities[id];
-	                    if (entity) {
-	                        var key = osmEntity.key(entity);
-	                        allEntities[key] = entity;
-	                        modified.push(key);
-	                    } else {
-	                        deleted.push(id);
-	                    }
+	          that.locationSets.set(resolved.id, feature);
+	        });
+	      });
+	      that.locationIndex = whichPolygon_1({
+	        type: 'FeatureCollection',
+	        features: _toConsumableArray(that.locationSets.values())
+	      });
 
-	                    // make sure that the originals of changed or deleted entities get merged
-	                    // into the base of the _stack after restoring the data from JSON.
-	                    if (id in base.graph.entities) {
-	                        baseEntities[id] = base.graph.entities[id];
-	                    }
-	                    if (entity && entity.nodes) {
-	                        // get originals of pre-existing child nodes
-	                        entity.nodes.forEach(function(nodeID) {
-	                            if (nodeID in base.graph.entities) {
-	                                baseEntities[nodeID] = base.graph.entities[nodeID];
-	                            }
-	                        });
-	                    }
-	                    // get originals of parent entities too
-	                    var baseParents = base.graph._parentWays[id];
-	                    if (baseParents) {
-	                        baseParents.forEach(function(parentID) {
-	                            if (parentID in base.graph.entities) {
-	                                baseEntities[parentID] = base.graph.entities[parentID];
-	                            }
-	                        });
-	                    }
-	                });
+	      function _cloneDeep(obj) {
+	        return JSON.parse(JSON.stringify(obj));
+	      }
+	    } //
+	    // `match()`
+	    // Pass parts and return an Array of matches.
+	    // `k` - key
+	    // `v` - value
+	    // `n` - namelike
+	    // `loc` - optional - [lon,lat] location to search
+	    //
+	    // 1. If the [k,v,n] tuple matches a canonical item…
+	    // Return an Array of match results.
+	    // Each result will include the area in km² that the item is valid.
+	    //
+	    // Order of results:
+	    // Primary ordering will be on the "match" column:
+	    //   "primary" - where the query matches the `name` tag, followed by
+	    //   "alternate" - where the query matches an alternate name tag (e.g. short_name, brand, operator, etc)
+	    // Secondary ordering will be on the "area" column:
+	    //   "area descending" if no location was provided, (worldwide before local)
+	    //   "area ascending" if location was provided (local before worldwide)
+	    //
+	    // [
+	    //   { match: 'primary',   itemID: String,  area: Number,  kv: String,  nsimple: String },
+	    //   { match: 'primary',   itemID: String,  area: Number,  kv: String,  nsimple: String },
+	    //   { match: 'alternate', itemID: String,  area: Number,  kv: String,  nsimple: String },
+	    //   { match: 'alternate', itemID: String,  area: Number,  kv: String,  nsimple: String },
+	    //   …
+	    // ]
+	    //
+	    // -or-
+	    //
+	    // 2. If the [k,v,n] tuple matches an exclude pattern…
+	    // Return an Array with a single exclude result, either
+	    //
+	    // [ { match: 'excludeGeneric', pattern: String,  kv: String } ]  // "generic" e.g. "Food Court"
+	    //   or
+	    // [ { match: 'excludeNamed', pattern: String,  kv: String } ]    // "named", e.g. "Kebabai"
+	    //
+	    // About results
+	    //   "generic" - a generic word that is probably not really a name.
+	    //     For these, iD should warn the user "Hey don't put 'food court' in the name tag".
+	    //   "named" - a real name like "Kebabai" that is just common, but not a brand.
+	    //     For these, iD should just let it be. We don't include these in NSI, but we don't want to nag users about it either.
+	    //
+	    // -or-
+	    //
+	    // 3. If the [k,v,n] tuple matches nothing of any kind, return `null`
+	    //
+	    //
 
-	                var x = {};
+	  }, {
+	    key: "match",
+	    value: function match(k, v, n, loc) {
+	      var that = this;
 
-	                if (modified.length) { x.modified = modified; }
-	                if (deleted.length) { x.deleted = deleted; }
-	                if (i.imageryUsed) { x.imageryUsed = i.imageryUsed; }
-	                if (i.photoOverlaysUsed) { x.photoOverlaysUsed = i.photoOverlaysUsed; }
-	                if (i.annotation) { x.annotation = i.annotation; }
-	                if (i.transform) { x.transform = i.transform; }
-	                if (i.selectedIDs) { x.selectedIDs = i.selectedIDs; }
+	      if (!that.matchIndex) {
+	        throw new Error('match:  matchIndex not built.');
+	      } // If we were supplied a location, and a that.locationIndex has been set up,
+	      // get the locationSets that are valid there so we can filter results.
 
-	                return x;
-	            });
 
-	            return JSON.stringify({
-	                version: 3,
-	                entities: Object.values(allEntities),
-	                baseEntities: Object.values(baseEntities),
-	                stack: s,
-	                nextIDs: osmEntity.id.next,
-	                index: _index,
-	                // note the time the changes were saved
-	                timestamp: (new Date()).getTime()
-	            });
-	        },
+	      var matchLocations;
 
+	      if (Array.isArray(loc) && that.locationIndex) {
+	        // which-polygon query returns an array of GeoJSON properties, pass true to return all results
+	        matchLocations = that.locationIndex([loc[0], loc[1], loc[0], loc[1]], true);
+	      }
 
-	        fromJSON: function(json, loadChildNodes) {
-	            var h = JSON.parse(json);
-	            var loadComplete = true;
+	      var nsimple = simplify$1(n);
+	      var seen = new Set();
+	      var results = [];
+	      gatherResults('primary');
+	      gatherResults('alternate');
+	      if (results.length) return results;
+	      gatherResults('exclude');
+	      return results.length ? results : null;
+
+	      function gatherResults(which) {
+	        // First try an exact match on k/v
+	        var kv = "".concat(k, "/").concat(v);
+	        var didMatch = tryMatch(which, kv);
+	        if (didMatch) return; // If that didn't work, look in match groups for other pairs considered equivalent to k/v..
+
+	        for (var mg in matchGroups) {
+	          var matchGroup = matchGroups[mg];
+	          var inGroup = matchGroup.some(function (otherkv) {
+	            return otherkv === kv;
+	          });
+	          if (!inGroup) continue;
 
-	            osmEntity.id.next = h.nextIDs;
-	            _index = h.index;
+	          for (var i = 0; i < matchGroup.length; i++) {
+	            var otherkv = matchGroup[i];
+	            if (otherkv === kv) continue; // skip self
 
-	            if (h.version === 2 || h.version === 3) {
-	                var allEntities = {};
+	            didMatch = tryMatch(which, otherkv);
+	            if (didMatch) return;
+	          }
+	        } // If finished 'exclude' pass and still haven't matched anything, try the global `genericWords.json` patterns
 
-	                h.entities.forEach(function(entity) {
-	                    allEntities[osmEntity.key(entity)] = osmEntity(entity);
-	                });
 
-	                if (h.version === 3) {
-	                    // This merges originals for changed entities into the base of
-	                    // the _stack even if the current _stack doesn't have them (for
-	                    // example when iD has been restarted in a different region)
-	                    var baseEntities = h.baseEntities.map(function(d) { return osmEntity(d); });
-	                    var stack = _stack.map(function(state) { return state.graph; });
-	                    _stack[0].graph.rebase(baseEntities, stack, true);
-	                    _tree.rebase(baseEntities, true);
-
-	                    // When we restore a modified way, we also need to fetch any missing
-	                    // childnodes that would normally have been downloaded with it.. #2142
-	                    if (loadChildNodes) {
-	                        var osm = context.connection();
-	                        var baseWays = baseEntities
-	                            .filter(function(e) { return e.type === 'way'; });
-	                        var nodeIDs = baseWays
-	                            .reduce(function(acc, way) { return utilArrayUnion(acc, way.nodes); }, []);
-	                        var missing = nodeIDs
-	                            .filter(function(n) { return !_stack[0].graph.hasEntity(n); });
-
-	                        if (missing.length && osm) {
-	                            loadComplete = false;
-	                            context.map().redrawEnable(false);
-
-	                            var loading = uiLoading(context).blocking(true);
-	                            context.container().call(loading);
-
-	                            var childNodesLoaded = function(err, result) {
-	                                if (!err) {
-	                                    var visibleGroups = utilArrayGroupBy(result.data, 'visible');
-	                                    var visibles = visibleGroups.true || [];      // alive nodes
-	                                    var invisibles = visibleGroups.false || [];   // deleted nodes
-
-	                                    if (visibles.length) {
-	                                        var visibleIDs = visibles.map(function(entity) { return entity.id; });
-	                                        var stack = _stack.map(function(state) { return state.graph; });
-	                                        missing = utilArrayDifference(missing, visibleIDs);
-	                                        _stack[0].graph.rebase(visibles, stack, true);
-	                                        _tree.rebase(visibles, true);
-	                                    }
-
-	                                    // fetch older versions of nodes that were deleted..
-	                                    invisibles.forEach(function(entity) {
-	                                        osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
-	                                    });
-	                                }
-
-	                                if (err || !missing.length) {
-	                                    loading.close();
-	                                    context.map().redrawEnable(true);
-	                                    dispatch$1.call('change');
-	                                    dispatch$1.call('restore', this);
-	                                }
-	                            };
-
-	                            osm.loadMultiple(missing, childNodesLoaded);
-	                        }
-	                    }
-	                }
+	        if (which === 'exclude') {
+	          var regex = _toConsumableArray(that.genericWords.values()).find(function (regex) {
+	            return regex.test(n);
+	          });
 
-	                _stack = h.stack.map(function(d) {
-	                    var entities = {}, entity;
+	          if (regex) {
+	            results.push({
+	              match: 'excludeGeneric',
+	              pattern: String(regex)
+	            }); // note no `branch`, no `kv`
 
-	                    if (d.modified) {
-	                        d.modified.forEach(function(key) {
-	                            entity = allEntities[key];
-	                            entities[entity.id] = entity;
-	                        });
-	                    }
+	            return;
+	          }
+	        }
+	      }
 
-	                    if (d.deleted) {
-	                        d.deleted.forEach(function(id) {
-	                            entities[id] = undefined;
-	                        });
-	                    }
+	      function tryMatch(which, kv) {
+	        var branch = that.matchIndex.get(kv);
+	        if (!branch) return;
 
-	                    return {
-	                        graph: coreGraph(_stack[0].graph).load(entities),
-	                        annotation: d.annotation,
-	                        imageryUsed: d.imageryUsed,
-	                        photoOverlaysUsed: d.photoOverlaysUsed,
-	                        transform: d.transform,
-	                        selectedIDs: d.selectedIDs
-	                    };
-	                });
+	        if (which === 'exclude') {
+	          // Test name `n` against named and generic exclude patterns
+	          var regex = _toConsumableArray(branch.excludeNamed.values()).find(function (regex) {
+	            return regex.test(n);
+	          });
 
-	            } else { // original version
-	                _stack = h.stack.map(function(d) {
-	                    var entities = {};
+	          if (regex) {
+	            results.push({
+	              match: 'excludeNamed',
+	              pattern: String(regex),
+	              kv: kv
+	            });
+	            return;
+	          }
 
-	                    for (var i in d.entities) {
-	                        var entity = d.entities[i];
-	                        entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
-	                    }
+	          regex = _toConsumableArray(branch.excludeGeneric.values()).find(function (regex) {
+	            return regex.test(n);
+	          });
 
-	                    d.graph = coreGraph(_stack[0].graph).load(entities);
-	                    return d;
-	                });
-	            }
+	          if (regex) {
+	            results.push({
+	              match: 'excludeGeneric',
+	              pattern: String(regex),
+	              kv: kv
+	            });
+	            return;
+	          }
 
-	            var transform = _stack[_index].transform;
-	            if (transform) {
-	                context.map().transformEase(transform, 0);   // 0 = immediate, no easing
-	            }
+	          return;
+	        }
 
-	            if (loadComplete) {
-	                dispatch$1.call('change');
-	                dispatch$1.call('restore', this);
-	            }
+	        var leaf = branch[which].get(nsimple);
+	        if (!leaf || !leaf.size) return; // If we get here, we matched something..
+	        // Prepare the results, calculate areas (if location index was set up)
 
-	            return history;
-	        },
+	        var hits = Array.from(leaf).map(function (itemID) {
+	          var area = Infinity;
 
+	          if (that.itemLocation && that.locationSets) {
+	            var location = that.locationSets.get(that.itemLocation.get(itemID));
+	            area = location && location.properties.area || Infinity;
+	          }
 
-	        lock: function() {
-	            return lock.lock();
-	        },
+	          return {
+	            match: which,
+	            itemID: itemID,
+	            area: area,
+	            kv: kv,
+	            nsimple: nsimple
+	          };
+	        });
+	        var sortFn = byAreaDescending; // Filter the match to include only results valid in the requested `loc`..
 
+	        if (matchLocations) {
+	          hits = hits.filter(isValidLocation);
+	          sortFn = byAreaAscending;
+	        }
 
-	        unlock: function() {
-	            lock.unlock();
-	        },
+	        if (!hits.length) return; // push results
 
+	        hits.sort(sortFn).forEach(function (hit) {
+	          if (seen.has(hit.itemID)) return;
+	          seen.add(hit.itemID);
+	          results.push(hit);
+	        });
+	        return true;
 
-	        save: function() {
-	            if (lock.locked() &&
-	                // don't overwrite existing, unresolved changes
-	                !_hasUnresolvedRestorableChanges) {
+	        function isValidLocation(hit) {
+	          if (!that.itemLocation) return true;
+	          return matchLocations.find(function (props) {
+	            return props.id === that.itemLocation.get(hit.itemID);
+	          });
+	        } // Sort smaller (more local) locations first.
 
-	                corePreferences(getKey('saved_history'), history.toJSON() || null);
-	            }
-	            return history;
-	        },
 
+	        function byAreaAscending(hitA, hitB) {
+	          return hitA.area - hitB.area;
+	        } // Sort larger (more worldwide) locations first.
 
-	        // delete the history version saved in localStorage
-	        clearSaved: function() {
-	            context.debouncedSave.cancel();
-	            if (lock.locked()) {
-	                _hasUnresolvedRestorableChanges = false;
-	                corePreferences(getKey('saved_history'), null);
 
-	                // clear the changeset metadata associated with the saved history
-	                corePreferences('comment', null);
-	                corePreferences('hashtags', null);
-	                corePreferences('source', null);
-	            }
-	            return history;
-	        },
+	        function byAreaDescending(hitA, hitB) {
+	          return hitB.area - hitA.area;
+	        }
+	      }
+	    } //
+	    // `getWarnings()`
+	    // Return any warnings discovered when buiding the index.
+	    // (currently this does nothing)
+	    //
 
+	  }, {
+	    key: "getWarnings",
+	    value: function getWarnings() {
+	      return this.warnings;
+	    }
+	  }]);
 
-	        savedHistoryJSON: function() {
-	            return corePreferences(getKey('saved_history'));
-	        },
+	  return Matcher;
+	}();
 
+	/*
+	    iD.coreDifference represents the difference between two graphs.
+	    It knows how to calculate the set of entities that were
+	    created, modified, or deleted, and also contains the logic
+	    for recursively extending a difference to the complete set
+	    of entities that will require a redraw, taking into account
+	    child and parent relationships.
+	 */
 
-	        hasRestorableChanges: function() {
-	            return _hasUnresolvedRestorableChanges;
-	        },
+	function coreDifference(base, head) {
+	  var _changes = {};
+	  var _didChange = {}; // 'addition', 'deletion', 'geometry', 'properties'
 
+	  var _diff = {};
 
-	        // load history from a version stored in localStorage
-	        restore: function() {
-	            if (lock.locked()) {
-	                _hasUnresolvedRestorableChanges = false;
-	                var json = this.savedHistoryJSON();
-	                if (json) { history.fromJSON(json, true); }
-	            }
-	        },
+	  function checkEntityID(id) {
+	    var h = head.entities[id];
+	    var b = base.entities[id];
+	    if (h === b) return;
+	    if (_changes[id]) return;
 
+	    if (!h && b) {
+	      _changes[id] = {
+	        base: b,
+	        head: h
+	      };
+	      _didChange.deletion = true;
+	      return;
+	    }
 
-	        _getKey: getKey
+	    if (h && !b) {
+	      _changes[id] = {
+	        base: b,
+	        head: h
+	      };
+	      _didChange.addition = true;
+	      return;
+	    }
 
-	    };
+	    if (h && b) {
+	      if (h.members && b.members && !fastDeepEqual(h.members, b.members)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.geometry = true;
+	        _didChange.properties = true;
+	        return;
+	      }
 
+	      if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.geometry = true;
+	      }
 
-	    history.reset();
+	      if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.geometry = true;
+	      }
 
-	    return utilRebind(history, dispatch$1, 'on');
-	}
+	      if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.properties = true;
+	      }
+	    }
+	  }
 
-	/**
-	 * Look for roads that can be connected to other roads with a short extension
-	 */
-	function validationAlmostJunction(context) {
-	  var type = 'almost_junction';
-	  var EXTEND_TH_METERS = 5;
-	  var WELD_TH_METERS = 0.75;
-	  // Comes from considering bounding case of parallel ways
-	  var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS;
-	  // Comes from considering bounding case of perpendicular ways
-	  var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
+	  function load() {
+	    // HOT CODE: there can be many thousands of downloaded entities, so looping
+	    // through them all can become a performance bottleneck. Optimize by
+	    // resolving duplicates and using a basic `for` loop
+	    var ids = utilArrayUniq(Object.keys(head.entities).concat(Object.keys(base.entities)));
 
-	  function isHighway(entity) {
-	    return entity.type === 'way'
-	      && osmRoutableHighwayTagValues[entity.tags.highway];
+	    for (var i = 0; i < ids.length; i++) {
+	      checkEntityID(ids[i]);
+	    }
 	  }
 
-	  function isTaggedAsNotContinuing(node) {
-	    return node.tags.noexit === 'yes'
-	      || node.tags.amenity === 'parking_entrance'
-	      || (node.tags.entrance && node.tags.entrance !== 'no');
-	  }
+	  load();
 
+	  _diff.length = function length() {
+	    return Object.keys(_changes).length;
+	  };
 
-	  var validation = function checkAlmostJunction(entity, graph) {
-	    if (!isHighway(entity)) { return []; }
-	    if (entity.isDegenerate()) { return []; }
+	  _diff.changes = function changes() {
+	    return _changes;
+	  };
 
-	    var tree = context.history().tree();
-	    var extendableNodeInfos = findConnectableEndNodesByExtension(entity);
+	  _diff.didChange = _didChange; // pass true to include affected relation members
 
-	    var issues = [];
+	  _diff.extantIDs = function extantIDs(includeRelMembers) {
+	    var result = new Set();
+	    Object.keys(_changes).forEach(function (id) {
+	      if (_changes[id].head) {
+	        result.add(id);
+	      }
 
-	    extendableNodeInfos.forEach(function (extendableNodeInfo) {
-	      issues.push(new validationIssue({
-	        type: type,
-	        subtype: 'highway-highway',
-	        severity: 'warning',
-	        message: function message(context) {
-	          var entity1 = context.hasEntity(this.entityIds[0]);
-	          if (this.entityIds[0] === this.entityIds[2]) {
-	            return entity1 ? _t('issues.almost_junction.self.message', {
-	              feature: utilDisplayLabel(entity1, context.graph())
-	            }) : '';
-	          } else {
-	            var entity2 = context.hasEntity(this.entityIds[2]);
-	            return (entity1 && entity2) ? _t('issues.almost_junction.message', {
-	              feature: utilDisplayLabel(entity1, context.graph()),
-	              feature2: utilDisplayLabel(entity2, context.graph())
-	            }) : '';
+	      var h = _changes[id].head;
+	      var b = _changes[id].base;
+	      var entity = h || b;
+
+	      if (includeRelMembers && entity.type === 'relation') {
+	        var mh = h ? h.members.map(function (m) {
+	          return m.id;
+	        }) : [];
+	        var mb = b ? b.members.map(function (m) {
+	          return m.id;
+	        }) : [];
+	        utilArrayUnion(mh, mb).forEach(function (memberID) {
+	          if (head.hasEntity(memberID)) {
+	            result.add(memberID);
 	          }
-	        },
-	        reference: showReference,
-	        entityIds: [
-	          entity.id,
-	          extendableNodeInfo.node.id,
-	          extendableNodeInfo.wid ],
-	        loc: extendableNodeInfo.node.loc,
-	        hash: JSON.stringify(extendableNodeInfo.node.loc),
-	        data: {
-	          midId: extendableNodeInfo.mid.id,
-	          edge: extendableNodeInfo.edge,
-	          cross_loc: extendableNodeInfo.cross_loc
-	        },
-	        dynamicFixes: makeFixes
-	      }));
+	        });
+	      }
 	    });
+	    return Array.from(result);
+	  };
 
-	    return issues;
+	  _diff.modified = function modified() {
+	    var result = [];
+	    Object.values(_changes).forEach(function (change) {
+	      if (change.base && change.head) {
+	        result.push(change.head);
+	      }
+	    });
+	    return result;
+	  };
 
-	    function makeFixes(context) {
-	      var fixes = [new validationIssueFix({
-	        icon: 'iD-icon-abutment',
-	        title: _t('issues.fix.connect_features.title'),
-	        onClick: function onClick(context) {
-	          var annotation = _t('issues.fix.connect_almost_junction.annotation');
-	          var ref = this.issue.entityIds;
-	          var endNodeId = ref[1];
-	          var crossWayId = ref[2];
-	          var midNode = context.entity(this.issue.data.midId);
-	          var endNode = context.entity(endNodeId);
-	          var crossWay = context.entity(crossWayId);
+	  _diff.created = function created() {
+	    var result = [];
+	    Object.values(_changes).forEach(function (change) {
+	      if (!change.base && change.head) {
+	        result.push(change.head);
+	      }
+	    });
+	    return result;
+	  };
 
-	          // When endpoints are close, just join if resulting small change in angle (#7201)
-	          var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
-	          if (nearEndNodes.length > 0) {
-	            var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
-	            if (collinear) {
-	              context.perform(
-	                actionMergeNodes([collinear.id, endNode.id], collinear.loc),
-	                annotation
-	              );
-	              return;
-	            }
-	          }
+	  _diff.deleted = function deleted() {
+	    var result = [];
+	    Object.values(_changes).forEach(function (change) {
+	      if (change.base && !change.head) {
+	        result.push(change.base);
+	      }
+	    });
+	    return result;
+	  };
 
-	          var targetEdge = this.issue.data.edge;
-	          var crossLoc = this.issue.data.cross_loc;
-	          var edgeNodes = [context.entity(targetEdge[0]), context.entity(targetEdge[1])];
-	          var closestNodeInfo = geoSphericalClosestNode(edgeNodes, crossLoc);
+	  _diff.summary = function summary() {
+	    var relevant = {};
+	    var keys = Object.keys(_changes);
 
-	          // already a point nearby, just connect to that
-	          if (closestNodeInfo.distance < WELD_TH_METERS) {
-	            context.perform(
-	              actionMergeNodes([closestNodeInfo.node.id, endNode.id], closestNodeInfo.node.loc),
-	              annotation
-	            );
-	          // else add the end node to the edge way
-	          } else {
-	            context.perform(
-	              actionAddMidpoint({loc: crossLoc, edge: targetEdge}, endNode),
-	              annotation
-	            );
-	          }
+	    for (var i = 0; i < keys.length; i++) {
+	      var change = _changes[keys[i]];
+
+	      if (change.head && change.head.geometry(head) !== 'vertex') {
+	        addEntity(change.head, head, change.base ? 'modified' : 'created');
+	      } else if (change.base && change.base.geometry(base) !== 'vertex') {
+	        addEntity(change.base, base, 'deleted');
+	      } else if (change.base && change.head) {
+	        // modified vertex
+	        var moved = !fastDeepEqual(change.base.loc, change.head.loc);
+	        var retagged = !fastDeepEqual(change.base.tags, change.head.tags);
+
+	        if (moved) {
+	          addParents(change.head);
 	        }
-	      })];
 
-	      var node = context.hasEntity(this.entityIds[1]);
-	      if (node && !node.hasInterestingTags()) {
-	        // node has no descriptive tags, suggest noexit fix
-	        fixes.push(new validationIssueFix({
-	          icon: 'maki-barrier',
-	          title: _t('issues.fix.tag_as_disconnected.title'),
-	          onClick: function onClick(context) {
-	            var nodeID = this.issue.entityIds[1];
-	            var tags = Object.assign({}, context.entity(nodeID).tags);
-	            tags.noexit = 'yes';
-	            context.perform(
-	              actionChangeTags(nodeID, tags),
-	              _t('issues.fix.tag_as_disconnected.annotation')
-	            );
-	          }
-	        }));
+	        if (retagged || moved && change.head.hasInterestingTags()) {
+	          addEntity(change.head, head, 'modified');
+	        }
+	      } else if (change.head && change.head.hasInterestingTags()) {
+	        // created vertex
+	        addEntity(change.head, head, 'created');
+	      } else if (change.base && change.base.hasInterestingTags()) {
+	        // deleted vertex
+	        addEntity(change.base, base, 'deleted');
 	      }
-
-	      return fixes;
 	    }
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.almost_junction.highway-highway.reference'));
+	    return Object.values(relevant);
+
+	    function addEntity(entity, graph, changeType) {
+	      relevant[entity.id] = {
+	        entity: entity,
+	        graph: graph,
+	        changeType: changeType
+	      };
 	    }
 
-	    function isExtendableCandidate(node, way) {
-	      // can not accurately test vertices on tiles not downloaded from osm - #5938
-	      var osm = services.osm;
-	      if (osm && !osm.isDataLoaded(node.loc)) {
-	        return false;
-	      }
-	      if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
-	        return false;
-	      }
+	    function addParents(entity) {
+	      var parents = head.parentWays(entity);
 
-	      var occurences = 0;
-	      for (var index in way.nodes) {
-	        if (way.nodes[index] === node.id) {
-	          occurences += 1;
-	          if (occurences > 1) {
-	            return false;
-	          }
+	      for (var j = parents.length - 1; j >= 0; j--) {
+	        var parent = parents[j];
+
+	        if (!(parent.id in relevant)) {
+	          addEntity(parent, head, 'modified');
 	        }
 	      }
-	      return true;
 	    }
+	  }; // returns complete set of entities that require a redraw
+	  //  (optionally within given `extent`)
 
-	    function findConnectableEndNodesByExtension(way) {
-	      var results = [];
-	      if (way.isClosed()) { return results; }
-
-	      var testNodes;
-	      var indices = [0, way.nodes.length - 1];
-	      indices.forEach(function (nodeIndex) {
-	        var nodeID = way.nodes[nodeIndex];
-	        var node = graph.entity(nodeID);
 
-	        if (!isExtendableCandidate(node, way)) { return; }
+	  _diff.complete = function complete(extent) {
+	    var result = {};
+	    var id, change;
 
-	        var connectionInfo = canConnectByExtend(way, nodeIndex);
-	        if (!connectionInfo) { return; }
+	    for (id in _changes) {
+	      change = _changes[id];
+	      var h = change.head;
+	      var b = change.base;
+	      var entity = h || b;
+	      var i;
 
-	        testNodes = graph.childNodes(way).slice();   // shallow copy
-	        testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc);
+	      if (extent && (!h || !h.intersects(extent, head)) && (!b || !b.intersects(extent, base))) {
+	        continue;
+	      }
 
-	        // don't flag issue if connecting the ways would cause self-intersection
-	        if (geoHasSelfIntersections(testNodes, nodeID)) { return; }
+	      result[id] = h;
 
-	        results.push(connectionInfo);
-	      });
+	      if (entity.type === 'way') {
+	        var nh = h ? h.nodes : [];
+	        var nb = b ? b.nodes : [];
+	        var diff;
+	        diff = utilArrayDifference(nh, nb);
 
-	      return results;
-	    }
+	        for (i = 0; i < diff.length; i++) {
+	          result[diff[i]] = head.hasEntity(diff[i]);
+	        }
 
-	    function findNearbyEndNodes(node, way) {
-	      return [
-	        way.nodes[0],
-	        way.nodes[way.nodes.length - 1]
-	      ].map(function (d) { return graph.entity(d); })
-	      .filter(function (d) {
-	        // Node cannot be near to itself, but other endnode of same way could be
-	        return d.id !== node.id
-	          && geoSphericalDistance(node.loc, d.loc) <= CLOSE_NODE_TH;
-	      });
-	    }
+	        diff = utilArrayDifference(nb, nh);
 
-	    function findSmallJoinAngle(midNode, tipNode, endNodes) {
-	      // Both nodes could be close, so want to join whichever is closest to collinear
-	      var joinTo;
-	      var minAngle = Infinity;
+	        for (i = 0; i < diff.length; i++) {
+	          result[diff[i]] = head.hasEntity(diff[i]);
+	        }
+	      }
 
-	      // Checks midNode -> tipNode -> endNode for collinearity
-	      endNodes.forEach(function (endNode) {
-	        var a1 = geoAngle(midNode, tipNode, context.projection) + Math.PI;
-	        var a2 = geoAngle(midNode, endNode, context.projection) + Math.PI;
-	        var diff = Math.max(a1, a2) - Math.min(a1, a2);
+	      if (entity.type === 'relation' && entity.isMultipolygon()) {
+	        var mh = h ? h.members.map(function (m) {
+	          return m.id;
+	        }) : [];
+	        var mb = b ? b.members.map(function (m) {
+	          return m.id;
+	        }) : [];
+	        var ids = utilArrayUnion(mh, mb);
 
-	        if (diff < minAngle) {
-	          joinTo = endNode;
-	          minAngle = diff;
-	        }
-	      });
+	        for (i = 0; i < ids.length; i++) {
+	          var member = head.hasEntity(ids[i]);
+	          if (!member) continue; // not downloaded
 
-	      /* Threshold set by considering right angle triangle
-	      based on node joining threshold and extension distance */
-	      if (minAngle <= SIG_ANGLE_TH) { return joinTo; }
+	          if (extent && !member.intersects(extent, head)) continue; // not visible
 
-	      return null;
-	    }
+	          result[ids[i]] = member;
+	        }
+	      }
 
-	    function hasTag(tags, key) {
-	      return tags[key] !== undefined && tags[key] !== 'no';
+	      addParents(head.parentWays(entity), result);
+	      addParents(head.parentRelations(entity), result);
 	    }
 
-	    function canConnectWays(way, way2) {
+	    return result;
 
-	      // allow self-connections
-	      if (way.id === way2.id) { return true; }
+	    function addParents(parents, result) {
+	      for (var i = 0; i < parents.length; i++) {
+	        var parent = parents[i];
+	        if (parent.id in result) continue;
+	        result[parent.id] = parent;
+	        addParents(head.parentRelations(parent), result);
+	      }
+	    }
+	  };
 
-	      // if one is bridge or tunnel, both must be bridge or tunnel
-	      if ((hasTag(way.tags, 'bridge') || hasTag(way2.tags, 'bridge')) &&
-	        !(hasTag(way.tags, 'bridge') && hasTag(way2.tags, 'bridge'))) { return false; }
-	      if ((hasTag(way.tags, 'tunnel') || hasTag(way2.tags, 'tunnel')) &&
-	        !(hasTag(way.tags, 'tunnel') && hasTag(way2.tags, 'tunnel'))) { return false; }
+	  return _diff;
+	}
 
-	      // must have equivalent layers and levels
-	      var layer1 = way.tags.layer || '0',
-	        layer2 = way2.tags.layer || '0';
-	      if (layer1 !== layer2) { return false; }
+	function coreTree(head) {
+	  // tree for entities
+	  var _rtree = new RBush();
 
-	      var level1 = way.tags.level || '0',
-	        level2 = way2.tags.level || '0';
-	      if (level1 !== level2) { return false; }
+	  var _bboxes = {}; // maintain a separate tree for granular way segments
 
-	      return true;
-	    }
+	  var _segmentsRTree = new RBush();
 
-	    function canConnectByExtend(way, endNodeIdx) {
-	      var tipNid = way.nodes[endNodeIdx];  // the 'tip' node for extension point
-	      var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2];  // the other node of the edge
-	      var tipNode = graph.entity(tipNid);
-	      var midNode = graph.entity(midNid);
-	      var lon = tipNode.loc[0];
-	      var lat = tipNode.loc[1];
-	      var lon_range = geoMetersToLon(EXTEND_TH_METERS, lat) / 2;
-	      var lat_range = geoMetersToLat(EXTEND_TH_METERS) / 2;
-	      var queryExtent = geoExtent([
-	        [lon - lon_range, lat - lat_range],
-	        [lon + lon_range, lat + lat_range]
-	      ]);
+	  var _segmentsBBoxes = {};
+	  var _segmentsByWayId = {};
+	  var tree = {};
 
-	      // first, extend the edge of [midNode -> tipNode] by EXTEND_TH_METERS and find the "extended tip" location
-	      var edgeLen = geoSphericalDistance(midNode.loc, tipNode.loc);
-	      var t = EXTEND_TH_METERS / edgeLen + 1.0;
-	      var extTipLoc = geoVecInterp(midNode.loc, tipNode.loc, t);
+	  function entityBBox(entity) {
+	    var bbox = entity.extent(head).bbox();
+	    bbox.id = entity.id;
+	    _bboxes[entity.id] = bbox;
+	    return bbox;
+	  }
 
-	      // then, check if the extension part [tipNode.loc -> extTipLoc] intersects any other ways
-	      var segmentInfos = tree.waySegments(queryExtent, graph);
-	      for (var i = 0; i < segmentInfos.length; i++) {
-	        var segmentInfo = segmentInfos[i];
+	  function segmentBBox(segment) {
+	    var extent = segment.extent(head); // extent can be null if the node entities aren't in the graph for some reason
 
-	        var way2 = graph.entity(segmentInfo.wayId);
+	    if (!extent) return null;
+	    var bbox = extent.bbox();
+	    bbox.segment = segment;
+	    _segmentsBBoxes[segment.id] = bbox;
+	    return bbox;
+	  }
 
-	        if (!isHighway(way2)) { continue; }
+	  function removeEntity(entity) {
+	    _rtree.remove(_bboxes[entity.id]);
 
-	        if (!canConnectWays(way, way2)) { continue; }
+	    delete _bboxes[entity.id];
 
-	        var nAid = segmentInfo.nodes[0],
-	          nBid = segmentInfo.nodes[1];
+	    if (_segmentsByWayId[entity.id]) {
+	      _segmentsByWayId[entity.id].forEach(function (segment) {
+	        _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
 
-	        if (nAid === tipNid || nBid === tipNid) { continue; }
+	        delete _segmentsBBoxes[segment.id];
+	      });
 
-	        var nA = graph.entity(nAid),
-	          nB = graph.entity(nBid);
-	        var crossLoc = geoLineIntersection([tipNode.loc, extTipLoc], [nA.loc, nB.loc]);
-	        if (crossLoc) {
-	          return {
-	            mid: midNode,
-	            node: tipNode,
-	            wid: way2.id,
-	            edge: [nA.id, nB.id],
-	            cross_loc: crossLoc
-	          };
-	        }
-	      }
-	      return null;
+	      delete _segmentsByWayId[entity.id];
 	    }
-	  };
-
-	  validation.type = type;
-
-	  return validation;
-	}
+	  }
 
-	function validationCloseNodes(context) {
-	    var type = 'close_nodes';
+	  function loadEntities(entities) {
+	    _rtree.load(entities.map(entityBBox));
 
-	    var pointThresholdMeters = 0.2;
+	    var segments = [];
+	    entities.forEach(function (entity) {
+	      if (entity.segments) {
+	        var entitySegments = entity.segments(head); // cache these to make them easy to remove later
 
-	    var validation = function(entity, graph) {
-	        if (entity.type === 'node') {
-	            return getIssuesForNode(entity);
-	        } else if (entity.type === 'way') {
-	            return getIssuesForWay(entity);
-	        }
-	        return [];
+	        _segmentsByWayId[entity.id] = entitySegments;
+	        segments = segments.concat(entitySegments);
+	      }
+	    });
+	    if (segments.length) _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean));
+	  }
 
-	        function getIssuesForNode(node) {
-	            var parentWays = graph.parentWays(node);
-	            if (parentWays.length) {
-	                return getIssuesForVertex(node, parentWays);
-	            } else {
-	                return getIssuesForDetachedPoint(node);
-	            }
-	        }
+	  function updateParents(entity, insertions, memo) {
+	    head.parentWays(entity).forEach(function (way) {
+	      if (_bboxes[way.id]) {
+	        removeEntity(way);
+	        insertions[way.id] = way;
+	      }
 
-	        function wayTypeFor(way) {
+	      updateParents(way, insertions, memo);
+	    });
+	    head.parentRelations(entity).forEach(function (relation) {
+	      if (memo[entity.id]) return;
+	      memo[entity.id] = true;
 
-	            if (way.tags.boundary && way.tags.boundary !== 'no') { return 'boundary'; }
-	            if (way.tags.indoor && way.tags.indoor !== 'no') { return 'indoor'; }
-	            if ((way.tags.building && way.tags.building !== 'no') ||
-	                (way.tags['building:part'] && way.tags['building:part'] !== 'no')) { return 'building'; }
-	            if (osmPathHighwayTagValues[way.tags.highway]) { return 'path'; }
+	      if (_bboxes[relation.id]) {
+	        removeEntity(relation);
+	        insertions[relation.id] = relation;
+	      }
 
-	            var parentRelations = graph.parentRelations(way);
-	            for (var i in parentRelations) {
-	                var relation = parentRelations[i];
+	      updateParents(relation, insertions, memo);
+	    });
+	  }
 
-	                if (relation.tags.type === 'boundary') { return 'boundary'; }
+	  tree.rebase = function (entities, force) {
+	    var insertions = {};
 
-	                if (relation.isMultipolygon()) {
-	                    if (relation.tags.indoor && relation.tags.indoor !== 'no') { return 'indoor'; }
-	                    if ((relation.tags.building && relation.tags.building !== 'no') ||
-	                        (relation.tags['building:part'] && relation.tags['building:part'] !== 'no')) { return 'building'; }
-	                }
-	            }
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (!entity.visible) continue;
 
-	            return 'other';
+	      if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
+	        if (!force) {
+	          continue;
+	        } else if (_bboxes[entity.id]) {
+	          removeEntity(entity);
 	        }
+	      }
 
-	        function shouldCheckWay(way) {
+	      insertions[entity.id] = entity;
+	      updateParents(entity, insertions, {});
+	    }
 
-	            // don't flag issues where merging would create degenerate ways
-	            if (way.nodes.length <= 2 ||
-	                (way.isClosed() && way.nodes.length <= 4)) { return false; }
+	    loadEntities(Object.values(insertions));
+	    return tree;
+	  };
 
-	            var bbox = way.extent(graph).bbox();
-	            var hypotenuseMeters = geoSphericalDistance([bbox.minX, bbox.minY], [bbox.maxX, bbox.maxY]);
-	            // don't flag close nodes in very small ways
-	            if (hypotenuseMeters < 1.5) { return false; }
+	  function updateToGraph(graph) {
+	    if (graph === head) return;
+	    var diff = coreDifference(head, graph);
+	    head = graph;
+	    var changed = diff.didChange;
+	    if (!changed.addition && !changed.deletion && !changed.geometry) return;
+	    var insertions = {};
 
-	            return true;
-	        }
+	    if (changed.deletion) {
+	      diff.deleted().forEach(function (entity) {
+	        removeEntity(entity);
+	      });
+	    }
 
-	        function getIssuesForWay(way) {
-	            if (!shouldCheckWay(way)) { return []; }
+	    if (changed.geometry) {
+	      diff.modified().forEach(function (entity) {
+	        removeEntity(entity);
+	        insertions[entity.id] = entity;
+	        updateParents(entity, insertions, {});
+	      });
+	    }
 
-	            var issues = [],
-	                nodes = graph.childNodes(way);
-	            for (var i = 0; i < nodes.length - 1; i++) {
-	                var node1 = nodes[i];
-	                var node2 = nodes[i+1];
+	    if (changed.addition) {
+	      diff.created().forEach(function (entity) {
+	        insertions[entity.id] = entity;
+	      });
+	    }
 
-	                var issue = getWayIssueIfAny(node1, node2, way);
-	                if (issue) { issues.push(issue); }
-	            }
-	            return issues;
-	        }
+	    loadEntities(Object.values(insertions));
+	  } // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
 
-	        function getIssuesForVertex(node, parentWays) {
-	            var issues = [];
 
-	            function checkForCloseness(node1, node2, way) {
-	                var issue = getWayIssueIfAny(node1, node2, way);
-	                if (issue) { issues.push(issue); }
-	            }
+	  tree.intersects = function (extent, graph) {
+	    updateToGraph(graph);
+	    return _rtree.search(extent.bbox()).map(function (bbox) {
+	      return graph.entity(bbox.id);
+	    });
+	  }; // returns an array of segment objects with bounding boxes overlapping `extent` for the given `graph`
 
-	            for (var i = 0; i < parentWays.length; i++) {
-	                var parentWay = parentWays[i];
 
-	                if (!shouldCheckWay(parentWay)) { continue; }
+	  tree.waySegments = function (extent, graph) {
+	    updateToGraph(graph);
+	    return _segmentsRTree.search(extent.bbox()).map(function (bbox) {
+	      return bbox.segment;
+	    });
+	  };
 
-	                var lastIndex = parentWay.nodes.length - 1;
-	                for (var j = 0; j < parentWay.nodes.length; j++) {
-	                    if (j !== 0) {
-	                        if (parentWay.nodes[j-1] === node.id) {
-	                            checkForCloseness(node, graph.entity(parentWay.nodes[j]), parentWay);
-	                        }
-	                    }
-	                    if (j !== lastIndex) {
-	                        if (parentWay.nodes[j+1] === node.id) {
-	                            checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
-	                        }
-	                    }
-	                }
-	            }
-	            return issues;
-	        }
+	  return tree;
+	}
 
-	        function thresholdMetersForWay(way) {
-	            if (!shouldCheckWay(way)) { return 0; }
+	function svgIcon(name, svgklass, useklass) {
+	  return function drawIcon(selection) {
+	    selection.selectAll('svg.icon' + (svgklass ? '.' + svgklass.split(' ')[0] : '')).data([0]).enter().append('svg').attr('class', 'icon ' + (svgklass || '')).append('use').attr('xlink:href', name).attr('class', useklass);
+	  };
+	}
 
-	            var wayType = wayTypeFor(way);
+	function uiModal(selection, blocking) {
+	  var _this = this;
 
-	            // don't flag boundaries since they might be highly detailed and can't be easily verified
-	            if (wayType === 'boundary') { return 0; }
-	            // expect some features to be mapped with higher levels of detail
-	            if (wayType === 'indoor') { return 0.01; }
-	            if (wayType === 'building') { return 0.05; }
-	            if (wayType === 'path') { return 0.1; }
-	            return 0.2;
-	        }
+	  var keybinding = utilKeybinding('modal');
+	  var previous = selection.select('div.modal');
+	  var animate = previous.empty();
+	  previous.transition().duration(200).style('opacity', 0).remove();
+	  var shaded = selection.append('div').attr('class', 'shaded').style('opacity', 0);
 
-	        function getIssuesForDetachedPoint(node) {
+	  shaded.close = function () {
+	    shaded.transition().duration(200).style('opacity', 0).remove();
+	    modal.transition().duration(200).style('top', '0px');
+	    select(document).call(keybinding.unbind);
+	  };
 
-	            var issues = [];
+	  var modal = shaded.append('div').attr('class', 'modal fillL');
+	  modal.append('input').attr('class', 'keytrap keytrap-first').on('focus.keytrap', moveFocusToLast);
 
-	            var lon = node.loc[0];
-	            var lat = node.loc[1];
-	            var lon_range = geoMetersToLon(pointThresholdMeters, lat) / 2;
-	            var lat_range = geoMetersToLat(pointThresholdMeters) / 2;
-	            var queryExtent = geoExtent([
-	                [lon - lon_range, lat - lat_range],
-	                [lon + lon_range, lat + lat_range]
-	            ]);
+	  if (!blocking) {
+	    shaded.on('click.remove-modal', function (d3_event) {
+	      if (d3_event.target === _this) {
+	        shaded.close();
+	      }
+	    });
+	    modal.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', shaded.close).call(svgIcon('#iD-icon-close'));
+	    keybinding.on('⌫', shaded.close).on('⎋', shaded.close);
+	    select(document).call(keybinding);
+	  }
 
-	            var intersected = context.history().tree().intersects(queryExtent, graph);
-	            for (var j = 0; j < intersected.length; j++) {
-	                var nearby = intersected[j];
+	  modal.append('div').attr('class', 'content');
+	  modal.append('input').attr('class', 'keytrap keytrap-last').on('focus.keytrap', moveFocusToFirst);
 
-	                if (nearby.id === node.id) { continue; }
-	                if (nearby.type !== 'node' || nearby.geometry(graph) !== 'point') { continue; }
+	  if (animate) {
+	    shaded.transition().style('opacity', 1);
+	  } else {
+	    shaded.style('opacity', 1);
+	  }
 
-	                if (nearby.loc === node.loc ||
-	                    geoSphericalDistance(node.loc, nearby.loc) < pointThresholdMeters) {
+	  return shaded;
 
-	                    // allow very close points if tags indicate the z-axis might vary
-	                    var zAxisKeys = { layer: true, level: true, 'addr:housenumber': true, 'addr:unit': true };
-	                    var zAxisDifferentiates = false;
-	                    for (var key in zAxisKeys) {
-	                        var nodeValue = node.tags[key] || '0';
-	                        var nearbyValue = nearby.tags[key] || '0';
-	                        if (nodeValue !== nearbyValue) {
-	                            zAxisDifferentiates = true;
-	                            break;
-	                        }
-	                    }
-	                    if (zAxisDifferentiates) { continue; }
-
-	                    issues.push(new validationIssue({
-	                        type: type,
-	                        subtype: 'detached',
-	                        severity: 'warning',
-	                        message: function(context) {
-	                            var entity = context.hasEntity(this.entityIds[0]),
-	                                entity2 = context.hasEntity(this.entityIds[1]);
-	                            return (entity && entity2) ? _t('issues.close_nodes.detached.message', {
-	                                feature: utilDisplayLabel(entity, context.graph()),
-	                                feature2: utilDisplayLabel(entity2, context.graph())
-	                            }) : '';
-	                        },
-	                        reference: showReference,
-	                        entityIds: [node.id, nearby.id],
-	                        dynamicFixes: function() {
-	                            return [
-	                                new validationIssueFix({
-	                                    icon: 'iD-operation-disconnect',
-	                                    title: _t('issues.fix.move_points_apart.title')
-	                                }),
-	                                new validationIssueFix({
-	                                    icon: 'iD-icon-layers',
-	                                    title: _t('issues.fix.use_different_layers_or_levels.title')
-	                                })
-	                            ];
-	                        }
-	                    }));
-	                }
-	            }
+	  function moveFocusToFirst() {
+	    var node = modal // there are additional rules about what's focusable, but this suits our purposes
+	    .select('a, button, input:not(.keytrap), select, textarea').node();
 
-	            return issues;
+	    if (node) {
+	      node.focus();
+	    } else {
+	      select(this).node().blur();
+	    }
+	  }
 
-	            function showReference(selection) {
-	                var referenceText = _t('issues.close_nodes.detached.reference');
-	                selection.selectAll('.issue-reference')
-	                    .data([0])
-	                    .enter()
-	                    .append('div')
-	                    .attr('class', 'issue-reference')
-	                    .text(referenceText);
-	            }
-	        }
+	  function moveFocusToLast() {
+	    var nodes = modal.selectAll('a, button, input:not(.keytrap), select, textarea').nodes();
 
-	        function getWayIssueIfAny(node1, node2, way) {
-	            if (node1.id === node2.id ||
-	                (node1.hasInterestingTags() && node2.hasInterestingTags())) {
-	                return null;
-	            }
+	    if (nodes.length) {
+	      nodes[nodes.length - 1].focus();
+	    } else {
+	      select(this).node().blur();
+	    }
+	  }
+	}
 
-	            if (node1.loc !== node2.loc) {
-	                var parentWays1 = graph.parentWays(node1);
-	                var parentWays2 = new Set(graph.parentWays(node2));
+	function uiLoading(context) {
+	  var _modalSelection = select(null);
 
-	                var sharedWays = parentWays1.filter(function(parentWay) {
-	                    return parentWays2.has(parentWay);
-	                });
+	  var _message = '';
+	  var _blocking = false;
 
-	                var thresholds = sharedWays.map(function(parentWay) {
-	                    return thresholdMetersForWay(parentWay);
-	                });
+	  var loading = function loading(selection) {
+	    _modalSelection = uiModal(selection, _blocking);
 
-	                var threshold = Math.min.apply(Math, thresholds);
-	                var distance = geoSphericalDistance(node1.loc, node2.loc);
-	                if (distance > threshold) { return null; }
-	            }
+	    var loadertext = _modalSelection.select('.content').classed('loading-modal', true).append('div').attr('class', 'modal-section fillL');
 
-	            return new validationIssue({
-	                type: type,
-	                subtype: 'vertices',
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.close_nodes.message', { way: utilDisplayLabel(entity, context.graph()) }) : '';
-	                },
-	                reference: showReference,
-	                entityIds: [way.id, node1.id, node2.id],
-	                loc: node1.loc,
-	                dynamicFixes: function() {
-	                    return [
-	                        new validationIssueFix({
-	                            icon: 'iD-icon-plus',
-	                            title: _t('issues.fix.merge_points.title'),
-	                            onClick: function(context) {
-	                                var entityIds = this.issue.entityIds;
-	                                var action = actionMergeNodes([entityIds[1], entityIds[2]]);
-	                                context.perform(action, _t('issues.fix.merge_close_vertices.annotation'));
-	                            }
-	                        }),
-	                        new validationIssueFix({
-	                            icon: 'iD-operation-disconnect',
-	                            title: _t('issues.fix.move_points_apart.title')
-	                        })
-	                    ];
-	                }
-	            });
+	    loadertext.append('img').attr('class', 'loader').attr('src', context.imagePath('loader-white.gif'));
+	    loadertext.append('h3').html(_message);
 
-	            function showReference(selection) {
-	                var referenceText = _t('issues.close_nodes.reference');
-	                selection.selectAll('.issue-reference')
-	                    .data([0])
-	                    .enter()
-	                    .append('div')
-	                    .attr('class', 'issue-reference')
-	                    .text(referenceText);
-	            }
-	        }
+	    _modalSelection.select('button.close').attr('class', 'hide');
 
-	    };
+	    return loading;
+	  };
 
+	  loading.message = function (val) {
+	    if (!arguments.length) return _message;
+	    _message = val;
+	    return loading;
+	  };
 
-	    validation.type = type;
+	  loading.blocking = function (val) {
+	    if (!arguments.length) return _blocking;
+	    _blocking = val;
+	    return loading;
+	  };
 
-	    return validation;
-	}
+	  loading.close = function () {
+	    _modalSelection.remove();
+	  };
 
-	function validationCrossingWays(context) {
-	    var type = 'crossing_ways';
-
-	    // returns the way or its parent relation, whichever has a useful feature type
-	    function getFeatureWithFeatureTypeTagsForWay(way, graph) {
-	        if (getFeatureType(way, graph) === null) {
-	            // if the way doesn't match a feature type, check its parent relations
-	            var parentRels = graph.parentRelations(way);
-	            for (var i = 0; i < parentRels.length; i++) {
-	                var rel = parentRels[i];
-	                if (getFeatureType(rel, graph) !== null) {
-	                    return rel;
-	                }
-	            }
-	        }
-	        return way;
-	    }
+	  loading.isShown = function () {
+	    return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
+	  };
 
+	  return loading;
+	}
 
-	    function hasTag(tags, key) {
-	        return tags[key] !== undefined && tags[key] !== 'no';
-	    }
+	function coreHistory(context) {
+	  var dispatch = dispatch$8('reset', 'change', 'merge', 'restore', 'undone', 'redone', 'storage_error');
 
-	    function taggedAsIndoor(tags) {
-	        return hasTag(tags, 'indoor') ||
-	            hasTag(tags, 'level') ||
-	            tags.highway === 'corridor';
-	    }
+	  var _lock = utilSessionMutex('lock'); // restorable if iD not open in another window/tab and a saved history exists in localStorage
 
-	    function allowsBridge(featureType) {
-	        return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
-	    }
-	    function allowsTunnel(featureType) {
-	        return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
-	    }
 
+	  var _hasUnresolvedRestorableChanges = _lock.lock() && !!corePreferences(getKey('saved_history'));
 
-	    function getFeatureTypeForCrossingCheck(way, graph) {
-	        var feature = getFeatureWithFeatureTypeTagsForWay(way, graph);
-	        return getFeatureType(feature, graph);
-	    }
+	  var duration = 150;
+	  var _imageryUsed = [];
+	  var _photoOverlaysUsed = [];
+	  var _checkpoints = {};
 
-	    // discard
-	    var ignoredBuildings = {
-	        demolished: true, dismantled: true, proposed: true, razed: true
-	    };
+	  var _pausedGraph;
 
+	  var _stack;
 
-	    function getFeatureType(entity, graph) {
+	  var _index;
 
-	        var geometry = entity.geometry(graph);
-	        if (geometry !== 'line' && geometry !== 'area') { return null; }
+	  var _tree; // internal _act, accepts list of actions and eased time
 
-	        var tags = entity.tags;
 
-	        if (hasTag(tags, 'building') && !ignoredBuildings[tags.building]) { return 'building'; }
-	        if (hasTag(tags, 'highway') && osmRoutableHighwayTagValues[tags.highway]) { return 'highway'; }
+	  function _act(actions, t) {
+	    actions = Array.prototype.slice.call(actions);
+	    var annotation;
 
-	        // don't check railway or waterway areas
-	        if (geometry !== 'line') { return null; }
+	    if (typeof actions[actions.length - 1] !== 'function') {
+	      annotation = actions.pop();
+	    }
 
-	        if (hasTag(tags, 'railway') && osmRailwayTrackTagValues[tags.railway]) { return 'railway'; }
-	        if (hasTag(tags, 'waterway') && osmFlowingWaterwayTagValues[tags.waterway]) { return 'waterway'; }
+	    var graph = _stack[_index].graph;
 
-	        return null;
+	    for (var i = 0; i < actions.length; i++) {
+	      graph = actions[i](graph, t);
 	    }
 
+	    return {
+	      graph: graph,
+	      annotation: annotation,
+	      imageryUsed: _imageryUsed,
+	      photoOverlaysUsed: _photoOverlaysUsed,
+	      transform: context.projection.transform(),
+	      selectedIDs: context.selectedIDs()
+	    };
+	  } // internal _perform with eased time
 
-	    function isLegitCrossing(way1, featureType1, way2, featureType2) {
-	        var tags1 = way1.tags;
-	        var tags2 = way2.tags;
 
-	        // assume 0 by default
-	        var level1 = tags1.level || '0';
-	        var level2 = tags2.level || '0';
+	  function _perform(args, t) {
+	    var previous = _stack[_index].graph;
+	    _stack = _stack.slice(0, _index + 1);
 
-	        if (taggedAsIndoor(tags1) && taggedAsIndoor(tags2) && level1 !== level2) {
-	            // assume features don't interact if they're indoor on different levels
-	            return true;
-	        }
+	    var actionResult = _act(args, t);
 
-	        // assume 0 by default; don't use way.layer() since we account for structures here
-	        var layer1 = tags1.layer || '0';
-	        var layer2 = tags2.layer || '0';
+	    _stack.push(actionResult);
 
-	        if (allowsBridge(featureType1) && allowsBridge(featureType2)) {
-	            if (hasTag(tags1, 'bridge') && !hasTag(tags2, 'bridge')) { return true; }
-	            if (!hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge')) { return true; }
-	            // crossing bridges must use different layers
-	            if (hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge') && layer1 !== layer2) { return true; }
-	        } else if (allowsBridge(featureType1) && hasTag(tags1, 'bridge')) { return true; }
-	        else if (allowsBridge(featureType2) && hasTag(tags2, 'bridge')) { return true; }
+	    _index++;
+	    return change(previous);
+	  } // internal _replace with eased time
 
-	        if (allowsTunnel(featureType1) && allowsTunnel(featureType2)) {
-	            if (hasTag(tags1, 'tunnel') && !hasTag(tags2, 'tunnel')) { return true; }
-	            if (!hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel')) { return true; }
-	            // crossing tunnels must use different layers
-	            if (hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel') && layer1 !== layer2) { return true; }
-	        } else if (allowsTunnel(featureType1) && hasTag(tags1, 'tunnel')) { return true; }
-	        else if (allowsTunnel(featureType2) && hasTag(tags2, 'tunnel')) { return true; }
 
-	        // don't flag crossing waterways and pier/highways
-	        if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') { return true; }
-	        if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') { return true; }
+	  function _replace(args, t) {
+	    var previous = _stack[_index].graph; // assert(_index == _stack.length - 1)
 
-	        if (featureType1 === 'building' || featureType2 === 'building') {
-	            // for building crossings, different layers are enough
-	            if (layer1 !== layer2) { return true; }
-	        }
-	        return false;
-	    }
+	    var actionResult = _act(args, t);
 
+	    _stack[_index] = actionResult;
+	    return change(previous);
+	  } // internal _overwrite with eased time
 
-	    // highway values for which we shouldn't recommend connecting to waterways
-	    var highwaysDisallowingFords = {
-	        motorway: true, motorway_link: true, trunk: true, trunk_link: true,
-	        primary: true, primary_link: true, secondary: true, secondary_link: true
-	    };
-	    var nonCrossingHighways = { track: true };
-
-	    function tagsForConnectionNodeIfAllowed(entity1, entity2, graph) {
-	        var featureType1 = getFeatureType(entity1, graph);
-	        var featureType2 = getFeatureType(entity2, graph);
-
-	        var geometry1 = entity1.geometry(graph);
-	        var geometry2 = entity2.geometry(graph);
-	        var bothLines = geometry1 === 'line' && geometry2 === 'line';
-
-	        if (featureType1 === featureType2) {
-	            if (featureType1 === 'highway') {
-	                var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
-	                var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];
-	                if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
-	                    // one feature is a path but not both
-
-	                    var roadFeature = entity1IsPath ? entity2 : entity1;
-	                    if (nonCrossingHighways[roadFeature.tags.highway]) {
-	                        // don't mark path connections with certain roads as crossings
-	                        return {};
-	                    }
-	                    var pathFeature = entity1IsPath ? entity1 : entity2;
-	                    if (['marked', 'unmarked'].indexOf(pathFeature.tags.crossing) !== -1) {
-	                        // if the path is a crossing, match the crossing type
-	                        return bothLines ? { highway: 'crossing', crossing: pathFeature.tags.crossing } : {};
-	                    }
-	                    // don't add a `crossing` subtag to ambiguous crossings
-	                    return bothLines ? { highway: 'crossing' } : {};
-	                }
-	                return {};
-	            }
-	            if (featureType1 === 'waterway') { return {}; }
-	            if (featureType1 === 'railway') { return {}; }
 
-	        } else {
-	            var featureTypes = [featureType1, featureType2];
-	            if (featureTypes.indexOf('highway') !== -1) {
-	                if (featureTypes.indexOf('railway') !== -1) {
-	                    if (osmPathHighwayTagValues[entity1.tags.highway] ||
-	                        osmPathHighwayTagValues[entity2.tags.highway]) {
-	                        // path-rail connections use this tag
-	                        return bothLines ? { railway: 'crossing' } : {};
-	                    } else {
-	                        // road-rail connections use this tag
-	                        return bothLines ? { railway: 'level_crossing' } : {};
-	                    }
-	                }
+	  function _overwrite(args, t) {
+	    var previous = _stack[_index].graph;
 
-	                if (featureTypes.indexOf('waterway') !== -1) {
-	                    // do not allow fords on structures
-	                    if (hasTag(entity1.tags, 'tunnel') && hasTag(entity2.tags, 'tunnel')) { return null; }
-	                    if (hasTag(entity1.tags, 'bridge') && hasTag(entity2.tags, 'bridge')) { return null; }
+	    if (_index > 0) {
+	      _index--;
 
-	                    if (highwaysDisallowingFords[entity1.tags.highway] ||
-	                        highwaysDisallowingFords[entity2.tags.highway]) {
-	                        // do not allow fords on major highways
-	                        return null;
-	                    }
-	                    return bothLines ? { ford: 'yes' } : {};
-	                }
-	            }
-	        }
-	        return null;
+	      _stack.pop();
 	    }
 
+	    _stack = _stack.slice(0, _index + 1);
 
-	    function findCrossingsByWay(way1, graph, tree) {
-	        var edgeCrossInfos = [];
-	        if (way1.type !== 'way') { return edgeCrossInfos; }
-
-	        var way1FeatureType = getFeatureTypeForCrossingCheck(way1, graph);
-	        if (way1FeatureType === null) { return edgeCrossInfos; }
-
-	        var checkedSingleCrossingWays = {};
-
-	        // declare vars ahead of time to reduce garbage collection
-	        var i, j;
-	        var extent;
-	        var n1, n2, nA, nB, nAId, nBId;
-	        var segment1, segment2;
-	        var oneOnly;
-	        var segmentInfos, segment2Info, way2, way2FeatureType;
-	        var way1Nodes = graph.childNodes(way1);
-	        var comparedWays = {};
-	        for (i = 0; i < way1Nodes.length - 1; i++) {
-	            n1 = way1Nodes[i];
-	            n2 = way1Nodes[i + 1];
-	            extent = geoExtent([
-	                [
-	                    Math.min(n1.loc[0], n2.loc[0]),
-	                    Math.min(n1.loc[1], n2.loc[1])
-	                ],
-	                [
-	                    Math.max(n1.loc[0], n2.loc[0]),
-	                    Math.max(n1.loc[1], n2.loc[1])
-	                ]
-	            ]);
-
-	            // Optimize by only checking overlapping segments, not every segment
-	            // of overlapping ways
-	            segmentInfos = tree.waySegments(extent, graph);
-
-	            for (j = 0; j < segmentInfos.length; j++) {
-	                segment2Info = segmentInfos[j];
-
-	                // don't check for self-intersection in this validation
-	                if (segment2Info.wayId === way1.id) { continue; }
-
-	                // skip if this way was already checked and only one issue is needed
-	                if (checkedSingleCrossingWays[segment2Info.wayId]) { continue; }
-
-	                // mark this way as checked even if there are no crossings
-	                comparedWays[segment2Info.wayId] = true;
-
-	                way2 = graph.hasEntity(segment2Info.wayId);
-	                if (!way2) { continue; }
-
-	                // only check crossing highway, waterway, building, and railway
-	                way2FeatureType = getFeatureTypeForCrossingCheck(way2, graph);
-	                if (way2FeatureType === null ||
-	                    isLegitCrossing(way1, way1FeatureType, way2, way2FeatureType)) {
-	                    continue;
-	                }
+	    var actionResult = _act(args, t);
 
-	                // create only one issue for building crossings
-	                oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
+	    _stack.push(actionResult);
 
-	                nAId = segment2Info.nodes[0];
-	                nBId = segment2Info.nodes[1];
-	                if (nAId === n1.id || nAId === n2.id ||
-	                    nBId === n1.id || nBId === n2.id) {
-	                    // n1 or n2 is a connection node; skip
-	                    continue;
-	                }
-	                nA = graph.hasEntity(nAId);
-	                if (!nA) { continue; }
-	                nB = graph.hasEntity(nBId);
-	                if (!nB) { continue; }
-
-	                segment1 = [n1.loc, n2.loc];
-	                segment2 = [nA.loc, nB.loc];
-	                var point = geoLineIntersection(segment1, segment2);
-	                if (point) {
-	                    edgeCrossInfos.push({
-	                        wayInfos: [
-	                            {
-	                                way: way1,
-	                                featureType: way1FeatureType,
-	                                edge: [n1.id, n2.id]
-	                            },
-	                            {
-	                                way: way2,
-	                                featureType: way2FeatureType,
-	                                edge: [nA.id, nB.id]
-	                            }
-	                        ],
-	                        crossPoint: point
-	                    });
-	                    if (oneOnly) {
-	                        checkedSingleCrossingWays[way2.id] = true;
-	                        break;
-	                    }
-	                }
-	            }
-	        }
-	        return edgeCrossInfos;
-	    }
+	    _index++;
+	    return change(previous);
+	  } // determine difference and dispatch a change event
 
 
-	    function waysToCheck(entity, graph) {
-	        var featureType = getFeatureType(entity, graph);
-	        if (!featureType) { return []; }
+	  function change(previous) {
+	    var difference = coreDifference(previous, history.graph());
 
-	        if (entity.type === 'way') {
-	            return [entity];
-	        } else if (entity.type === 'relation') {
-	            return entity.members.reduce(function(array, member) {
-	                if (member.type === 'way' &&
-	                    // only look at geometry ways
-	                    (!member.role || member.role === 'outer' || member.role === 'inner')) {
-	                    var entity = graph.hasEntity(member.id);
-	                    // don't add duplicates
-	                    if (entity && array.indexOf(entity) === -1) {
-	                        array.push(entity);
-	                    }
-	                }
-	                return array;
-	            }, []);
-	        }
-	        return [];
+	    if (!_pausedGraph) {
+	      dispatch.call('change', this, difference);
 	    }
 
+	    return difference;
+	  } // iD uses namespaced keys so multiple installations do not conflict
 
-	    var validation = function checkCrossingWays(entity, graph) {
-
-	        var tree = context.history().tree();
-
-	        var ways = waysToCheck(entity, graph);
-
-	        var issues = [];
-	        // declare these here to reduce garbage collection
-	        var wayIndex, crossingIndex, crossings;
-	        for (wayIndex in ways) {
-	            crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
-	            for (crossingIndex in crossings) {
-	                issues.push(createIssue(crossings[crossingIndex], graph));
-	            }
-	        }
-	        return issues;
-	    };
 
+	  function getKey(n) {
+	    return 'iD_' + window.location.origin + '_' + n;
+	  }
 
-	    function createIssue(crossing, graph) {
+	  var history = {
+	    graph: function graph() {
+	      return _stack[_index].graph;
+	    },
+	    tree: function tree() {
+	      return _tree;
+	    },
+	    base: function base() {
+	      return _stack[0].graph;
+	    },
+	    merge: function merge(entities
+	    /*, extent*/
+	    ) {
+	      var stack = _stack.map(function (state) {
+	        return state.graph;
+	      });
 
-	        // use the entities with the tags that define the feature type
-	        crossing.wayInfos.sort(function(way1Info, way2Info) {
-	            var type1 = way1Info.featureType;
-	            var type2 = way2Info.featureType;
-	            if (type1 === type2) {
-	                return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
-	            } else if (type1 === 'waterway') {
-	                return true;
-	            } else if (type2 === 'waterway') {
-	                return false;
-	            }
-	            return type1 < type2;
-	        });
-	        var entities = crossing.wayInfos.map(function(wayInfo) {
-	            return getFeatureWithFeatureTypeTagsForWay(wayInfo.way, graph);
-	        });
-	        var edges = [crossing.wayInfos[0].edge, crossing.wayInfos[1].edge];
-	        var featureTypes = [crossing.wayInfos[0].featureType, crossing.wayInfos[1].featureType];
+	      _stack[0].graph.rebase(entities, stack, false);
 
-	        var connectionTags = tagsForConnectionNodeIfAllowed(entities[0], entities[1], graph);
+	      _tree.rebase(entities, false);
 
-	        var featureType1 = crossing.wayInfos[0].featureType;
-	        var featureType2 = crossing.wayInfos[1].featureType;
+	      dispatch.call('merge', this, entities);
+	    },
+	    perform: function perform() {
+	      // complete any transition already in progress
+	      select(document).interrupt('history.perform');
+	      var transitionable = false;
+	      var action0 = arguments[0];
 
-	        var isCrossingIndoors = taggedAsIndoor(entities[0].tags) && taggedAsIndoor(entities[1].tags);
-	        var isCrossingTunnels = allowsTunnel(featureType1) && hasTag(entities[0].tags, 'tunnel') &&
-	                                allowsTunnel(featureType2) && hasTag(entities[1].tags, 'tunnel');
-	        var isCrossingBridges = allowsBridge(featureType1) && hasTag(entities[0].tags, 'bridge') &&
-	                                allowsBridge(featureType2) && hasTag(entities[1].tags, 'bridge');
+	      if (arguments.length === 1 || arguments.length === 2 && typeof arguments[1] !== 'function') {
+	        transitionable = !!action0.transitionable;
+	      }
 
-	        var subtype = [featureType1, featureType2].sort().join('-');
+	      if (transitionable) {
+	        var origArguments = arguments;
+	        select(document).transition('history.perform').duration(duration).ease(linear$1).tween('history.tween', function () {
+	          return function (t) {
+	            if (t < 1) _overwrite([action0], t);
+	          };
+	        }).on('start', function () {
+	          _perform([action0], 0);
+	        }).on('end interrupt', function () {
+	          _overwrite(origArguments, 1);
+	        });
+	      } else {
+	        return _perform(arguments);
+	      }
+	    },
+	    replace: function replace() {
+	      select(document).interrupt('history.perform');
+	      return _replace(arguments, 1);
+	    },
+	    // Same as calling pop and then perform
+	    overwrite: function overwrite() {
+	      select(document).interrupt('history.perform');
+	      return _overwrite(arguments, 1);
+	    },
+	    pop: function pop(n) {
+	      select(document).interrupt('history.perform');
+	      var previous = _stack[_index].graph;
 
-	        var crossingTypeID = subtype;
+	      if (isNaN(+n) || +n < 0) {
+	        n = 1;
+	      }
 
-	        if (isCrossingIndoors) {
-	            crossingTypeID = 'indoor-indoor';
-	        } else if (isCrossingTunnels) {
-	            crossingTypeID = 'tunnel-tunnel';
-	        } else if (isCrossingBridges) {
-	            crossingTypeID = 'bridge-bridge';
-	        }
-	        if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
-	            crossingTypeID += '_connectable';
-	        }
+	      while (n-- > 0 && _index > 0) {
+	        _index--;
 
-	        return new validationIssue({
-	            type: type,
-	            subtype: subtype,
-	            severity: 'warning',
-	            message: function(context) {
-	                var graph = context.graph();
-	                var entity1 = graph.hasEntity(this.entityIds[0]),
-	                    entity2 = graph.hasEntity(this.entityIds[1]);
-	                return (entity1 && entity2) ? _t('issues.crossing_ways.message', {
-	                    feature: utilDisplayLabel(entity1, graph),
-	                    feature2: utilDisplayLabel(entity2, graph)
-	                }) : '';
-	            },
-	            reference: showReference,
-	            entityIds: entities.map(function(entity) {
-	                return entity.id;
-	            }),
-	            data: {
-	                edges: edges,
-	                featureTypes: featureTypes,
-	                connectionTags: connectionTags
-	            },
-	            // differentiate based on the loc since two ways can cross multiple times
-	            hash: crossing.crossPoint.toString() +
-	                // if the edges change then so does the fix
-	                edges.slice().sort(function(edge1, edge2) {
-	                    // order to assure hash is deterministic
-	                    return edge1[0] < edge2[0] ? -1 : 1;
-	                }).toString() +
-	                // ensure the correct connection tags are added in the fix
-	                JSON.stringify(connectionTags),
-	            loc: crossing.crossPoint,
-	            dynamicFixes: function(context) {
-	                var mode = context.mode();
-	                if (!mode || mode.id !== 'select' || mode.selectedIDs().length !== 1) { return []; }
-
-	                var selectedIndex = this.entityIds[0] === mode.selectedIDs()[0] ? 0 : 1;
-	                var selectedFeatureType = this.data.featureTypes[selectedIndex];
-	                var otherFeatureType = this.data.featureTypes[selectedIndex === 0 ? 1 : 0];
-
-	                var fixes = [];
-
-	                if (connectionTags) {
-	                    fixes.push(makeConnectWaysFix(this.data.connectionTags));
-	                }
+	        _stack.pop();
+	      }
 
-	                if (isCrossingIndoors) {
-	                    fixes.push(new validationIssueFix({
-	                        icon: 'iD-icon-layers',
-	                        title: _t('issues.fix.use_different_levels.title')
-	                    }));
-	                } else if (isCrossingTunnels ||
-	                    isCrossingBridges ||
-	                    featureType1 === 'building' ||
-	                    featureType2 === 'building')  {
-
-	                    fixes.push(makeChangeLayerFix('higher'));
-	                    fixes.push(makeChangeLayerFix('lower'));
-
-	                // can only add bridge/tunnel if both features are lines
-	                } else if (context.graph().geometry(this.entityIds[0]) === 'line' &&
-	                    context.graph().geometry(this.entityIds[1]) === 'line') {
-
-	                    // don't recommend adding bridges to waterways since they're uncommmon
-	                    if (allowsBridge(selectedFeatureType) && selectedFeatureType !== 'waterway') {
-	                        fixes.push(makeAddBridgeOrTunnelFix('add_a_bridge', 'temaki-bridge', 'bridge'));
-	                    }
+	      return change(previous);
+	    },
+	    // Back to the previous annotated state or _index = 0.
+	    undo: function undo() {
+	      select(document).interrupt('history.perform');
+	      var previousStack = _stack[_index];
+	      var previous = previousStack.graph;
 
-	                    // don't recommend adding tunnels under waterways since they're uncommmon
-	                    var skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';
-	                    if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
-	                        fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
-	                    }
-	                }
+	      while (_index > 0) {
+	        _index--;
+	        if (_stack[_index].annotation) break;
+	      }
 
-	                // repositioning the features is always an option
-	                fixes.push(new validationIssueFix({
-	                    icon: 'iD-operation-move',
-	                    title: _t('issues.fix.reposition_features.title')
-	                }));
+	      dispatch.call('undone', this, _stack[_index], previousStack);
+	      return change(previous);
+	    },
+	    // Forward to the next annotated state.
+	    redo: function redo() {
+	      select(document).interrupt('history.perform');
+	      var previousStack = _stack[_index];
+	      var previous = previousStack.graph;
+	      var tryIndex = _index;
 
-	                return fixes;
-	            }
-	        });
+	      while (tryIndex < _stack.length - 1) {
+	        tryIndex++;
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.crossing_ways.' + crossingTypeID + '.reference'));
+	        if (_stack[tryIndex].annotation) {
+	          _index = tryIndex;
+	          dispatch.call('redone', this, _stack[_index], previousStack);
+	          break;
 	        }
-	    }
-
-	    function makeAddBridgeOrTunnelFix(fixTitleID, iconName, bridgeOrTunnel){
-	        return new validationIssueFix({
-	            icon: iconName,
-	            title: _t('issues.fix.' + fixTitleID + '.title'),
-	            onClick: function(context) {
-	                var mode = context.mode();
-	                if (!mode || mode.id !== 'select') { return; }
-
-	                var selectedIDs = mode.selectedIDs();
-	                if (selectedIDs.length !== 1) { return; }
-
-	                var selectedWayID = selectedIDs[0];
-	                if (!context.hasEntity(selectedWayID)) { return; }
+	      }
 
-	                var resultWayIDs = [selectedWayID];
+	      return change(previous);
+	    },
+	    pauseChangeDispatch: function pauseChangeDispatch() {
+	      if (!_pausedGraph) {
+	        _pausedGraph = _stack[_index].graph;
+	      }
+	    },
+	    resumeChangeDispatch: function resumeChangeDispatch() {
+	      if (_pausedGraph) {
+	        var previous = _pausedGraph;
+	        _pausedGraph = null;
+	        return change(previous);
+	      }
+	    },
+	    undoAnnotation: function undoAnnotation() {
+	      var i = _index;
 
-	                var edge, crossedEdge, crossedWayID;
-	                if (this.issue.entityIds[0] === selectedWayID) {
-	                    edge = this.issue.data.edges[0];
-	                    crossedEdge = this.issue.data.edges[1];
-	                    crossedWayID = this.issue.entityIds[1];
-	                } else {
-	                    edge = this.issue.data.edges[1];
-	                    crossedEdge = this.issue.data.edges[0];
-	                    crossedWayID = this.issue.entityIds[0];
-	                }
+	      while (i >= 0) {
+	        if (_stack[i].annotation) return _stack[i].annotation;
+	        i--;
+	      }
+	    },
+	    redoAnnotation: function redoAnnotation() {
+	      var i = _index + 1;
 
-	                var crossingLoc = this.issue.loc;
+	      while (i <= _stack.length - 1) {
+	        if (_stack[i].annotation) return _stack[i].annotation;
+	        i++;
+	      }
+	    },
+	    // Returns the entities from the active graph with bounding boxes
+	    // overlapping the given `extent`.
+	    intersects: function intersects(extent) {
+	      return _tree.intersects(extent, _stack[_index].graph);
+	    },
+	    difference: function difference() {
+	      var base = _stack[0].graph;
+	      var head = _stack[_index].graph;
+	      return coreDifference(base, head);
+	    },
+	    changes: function changes(action) {
+	      var base = _stack[0].graph;
+	      var head = _stack[_index].graph;
 
-	                var projection = context.projection;
+	      if (action) {
+	        head = action(head);
+	      }
 
-	                var action = function actionAddStructure(graph) {
+	      var difference = coreDifference(base, head);
+	      return {
+	        modified: difference.modified(),
+	        created: difference.created(),
+	        deleted: difference.deleted()
+	      };
+	    },
+	    hasChanges: function hasChanges() {
+	      return this.difference().length() > 0;
+	    },
+	    imageryUsed: function imageryUsed(sources) {
+	      if (sources) {
+	        _imageryUsed = sources;
+	        return history;
+	      } else {
+	        var s = new Set();
 
-	                    var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
+	        _stack.slice(1, _index + 1).forEach(function (state) {
+	          state.imageryUsed.forEach(function (source) {
+	            if (source !== 'Custom') {
+	              s.add(source);
+	            }
+	          });
+	        });
 
-	                    var crossedWay = graph.hasEntity(crossedWayID);
-	                    // use the explicit width of the crossed feature as the structure length, if available
-	                    var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
-	                    if (!structLengthMeters) {
-	                        // if no explicit width is set, approximate the width based on the tags
-	                        structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
-	                    }
-	                    if (structLengthMeters) {
-	                        if (getFeatureType(crossedWay, graph) === 'railway') {
-	                            // bridges over railways are generally much longer than the rail bed itself, compensate
-	                            structLengthMeters *= 2;
-	                        }
-	                    } else {
-	                        // should ideally never land here since all rail/water/road tags should have an implied width
-	                        structLengthMeters = 8;
-	                    }
+	        return Array.from(s);
+	      }
+	    },
+	    photoOverlaysUsed: function photoOverlaysUsed(sources) {
+	      if (sources) {
+	        _photoOverlaysUsed = sources;
+	        return history;
+	      } else {
+	        var s = new Set();
 
-	                    var a1 = geoAngle(edgeNodes[0], edgeNodes[1], projection) + Math.PI;
-	                    var a2 = geoAngle(graph.entity(crossedEdge[0]), graph.entity(crossedEdge[1]), projection) + Math.PI;
-	                    var crossingAngle = Math.max(a1, a2) - Math.min(a1, a2);
-	                    if (crossingAngle > Math.PI) { crossingAngle -= Math.PI; }
-	                    // lengthen the structure to account for the angle of the crossing
-	                    structLengthMeters = ((structLengthMeters / 2) / Math.sin(crossingAngle)) * 2;
+	        _stack.slice(1, _index + 1).forEach(function (state) {
+	          if (state.photoOverlaysUsed && Array.isArray(state.photoOverlaysUsed)) {
+	            state.photoOverlaysUsed.forEach(function (photoOverlay) {
+	              s.add(photoOverlay);
+	            });
+	          }
+	        });
 
-	                    // add padding since the structure must extend past the edges of the crossed feature
-	                    structLengthMeters += 4;
+	        return Array.from(s);
+	      }
+	    },
+	    // save the current history state
+	    checkpoint: function checkpoint(key) {
+	      _checkpoints[key] = {
+	        stack: _stack,
+	        index: _index
+	      };
+	      return history;
+	    },
+	    // restore history state to a given checkpoint or reset completely
+	    reset: function reset(key) {
+	      if (key !== undefined && _checkpoints.hasOwnProperty(key)) {
+	        _stack = _checkpoints[key].stack;
+	        _index = _checkpoints[key].index;
+	      } else {
+	        _stack = [{
+	          graph: coreGraph()
+	        }];
+	        _index = 0;
+	        _tree = coreTree(_stack[0].graph);
+	        _checkpoints = {};
+	      }
 
-	                    // clamp the length to a reasonable range
-	                    structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
+	      dispatch.call('reset');
+	      dispatch.call('change');
+	      return history;
+	    },
+	    // `toIntroGraph()` is used to export the intro graph used by the walkthrough.
+	    //
+	    // To use it:
+	    //  1. Start the walkthrough.
+	    //  2. Get to a "free editing" tutorial step
+	    //  3. Make your edits to the walkthrough map
+	    //  4. In your browser dev console run:
+	    //        `id.history().toIntroGraph()`
+	    //  5. This outputs stringified JSON to the browser console
+	    //  6. Copy it to `data/intro_graph.json` and prettify it in your code editor
+	    toIntroGraph: function toIntroGraph() {
+	      var nextID = {
+	        n: 0,
+	        r: 0,
+	        w: 0
+	      };
+	      var permIDs = {};
+	      var graph = this.graph();
+	      var baseEntities = {}; // clone base entities..
 
-	                    function geomToProj(geoPoint) {
-	                        return [
-	                            geoLonToMeters(geoPoint[0], geoPoint[1]),
-	                            geoLatToMeters(geoPoint[1])
-	                        ];
-	                    }
-	                    function projToGeom(projPoint) {
-	                        var lat = geoMetersToLat(projPoint[1]);
-	                        return [
-	                            geoMetersToLon(projPoint[0], lat),
-	                            lat
-	                        ];
-	                    }
+	      Object.values(graph.base().entities).forEach(function (entity) {
+	        var copy = copyIntroEntity(entity);
+	        baseEntities[copy.id] = copy;
+	      }); // replace base entities with head entities..
 
-	                    var projEdgeNode1 = geomToProj(edgeNodes[0].loc);
-	                    var projEdgeNode2 = geomToProj(edgeNodes[1].loc);
+	      Object.keys(graph.entities).forEach(function (id) {
+	        var entity = graph.entities[id];
 
-	                    var projectedAngle = geoVecAngle(projEdgeNode1, projEdgeNode2);
+	        if (entity) {
+	          var copy = copyIntroEntity(entity);
+	          baseEntities[copy.id] = copy;
+	        } else {
+	          delete baseEntities[id];
+	        }
+	      }); // swap temporary for permanent ids..
 
-	                    var projectedCrossingLoc = geomToProj(crossingLoc);
-	                    var linearToSphericalMetersRatio = geoVecLength(projEdgeNode1, projEdgeNode2) /
-	                        geoSphericalDistance(edgeNodes[0].loc, edgeNodes[1].loc);
+	      Object.values(baseEntities).forEach(function (entity) {
+	        if (Array.isArray(entity.nodes)) {
+	          entity.nodes = entity.nodes.map(function (node) {
+	            return permIDs[node] || node;
+	          });
+	        }
 
-	                    function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
-	                        var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
-	                        return projToGeom([
-	                            projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters,
-	                            projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters
-	                        ]);
-	                    }
+	        if (Array.isArray(entity.members)) {
+	          entity.members = entity.members.map(function (member) {
+	            member.id = permIDs[member.id] || member.id;
+	            return member;
+	          });
+	        }
+	      });
+	      return JSON.stringify({
+	        dataIntroGraph: baseEntities
+	      });
 
-	                    var endpointLocGetter1 = function(lengthMeters) {
-	                        return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
-	                    };
-	                    var endpointLocGetter2 = function(lengthMeters) {
-	                        return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
-	                    };
-
-	                    // avoid creating very short edges from splitting too close to another node
-	                    var minEdgeLengthMeters = 0.55;
-
-	                    // decide where to bound the structure along the way, splitting as necessary
-	                    function determineEndpoint(edge, endNode, locGetter) {
-	                        var newNode;
-
-	                        var idealLengthMeters = structLengthMeters / 2;
-
-	                        // distance between the crossing location and the end of the edge,
-	                        // the maximum length of this side of the structure
-	                        var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);
-
-	                        if (crossingToEdgeEndDistance - idealLengthMeters > minEdgeLengthMeters) {
-	                            // the edge is long enough to insert a new node
-
-	                            // the loc that would result in the full expected length
-	                            var idealNodeLoc = locGetter(idealLengthMeters);
-
-	                            newNode = osmNode();
-	                            graph = actionAddMidpoint({ loc: idealNodeLoc, edge: edge }, newNode)(graph);
-
-	                        } else {
-	                            var edgeCount = 0;
-	                            endNode.parentIntersectionWays(graph).forEach(function(way) {
-	                                way.nodes.forEach(function(nodeID) {
-	                                    if (nodeID === endNode.id) {
-	                                        if ((endNode.id === way.first() && endNode.id !== way.last()) ||
-	                                            (endNode.id === way.last() && endNode.id !== way.first())) {
-	                                            edgeCount += 1;
-	                                        } else {
-	                                            edgeCount += 2;
-	                                        }
-	                                    }
-	                                });
-	                            });
-
-	                            if (edgeCount >= 3) {
-	                                // the end node is a junction, try to leave a segment
-	                                // between it and the structure - #7202
-
-	                                var insetLength = crossingToEdgeEndDistance - minEdgeLengthMeters;
-	                                if (insetLength > minEdgeLengthMeters) {
-	                                    var insetNodeLoc = locGetter(insetLength);
-	                                    newNode = osmNode();
-	                                    graph = actionAddMidpoint({ loc: insetNodeLoc, edge: edge }, newNode)(graph);
-	                                }
-	                            }
-	                        }
-
-	                        // if the edge is too short to subdivide as desired, then
-	                        // just bound the structure at the existing end node
-	                        if (!newNode) { newNode = endNode; }
-
-	                        var splitAction = actionSplit(newNode.id)
-	                            .limitWays(resultWayIDs); // only split selected or created ways
-
-	                        // do the split
-	                        graph = splitAction(graph);
-	                        if (splitAction.getCreatedWayIDs().length) {
-	                            resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
-	                        }
-
-	                        return newNode;
-	                    }
+	      function copyIntroEntity(source) {
+	        var copy = utilObjectOmit(source, ['type', 'user', 'v', 'version', 'visible']); // Note: the copy is no longer an osmEntity, so it might not have `tags`
 
-	                    var structEndNode1 = determineEndpoint(edge, edgeNodes[1], endpointLocGetter1);
-	                    var structEndNode2 = determineEndpoint([edgeNodes[0].id, structEndNode1.id], edgeNodes[0], endpointLocGetter2);
+	        if (copy.tags && !Object.keys(copy.tags)) {
+	          delete copy.tags;
+	        }
 
-	                    var structureWay = resultWayIDs.map(function(id) {
-	                        return graph.entity(id);
-	                    }).find(function(way) {
-	                        return way.nodes.indexOf(structEndNode1.id) !== -1 &&
-	                            way.nodes.indexOf(structEndNode2.id) !== -1;
-	                    });
+	        if (Array.isArray(copy.loc)) {
+	          copy.loc[0] = +copy.loc[0].toFixed(6);
+	          copy.loc[1] = +copy.loc[1].toFixed(6);
+	        }
 
-	                    var tags = Object.assign({}, structureWay.tags); // copy tags
-	                    if (bridgeOrTunnel === 'bridge'){
-	                        tags.bridge = 'yes';
-	                        tags.layer = '1';
-	                    } else {
-	                        var tunnelValue = 'yes';
-	                        if (getFeatureType(structureWay, graph) === 'waterway') {
-	                            // use `tunnel=culvert` for waterways by default
-	                            tunnelValue = 'culvert';
-	                        }
-	                        tags.tunnel = tunnelValue;
-	                        tags.layer = '-1';
-	                    }
-	                    // apply the structure tags to the way
-	                    graph = actionChangeTags(structureWay.id, tags)(graph);
-	                    return graph;
-	                };
+	        var match = source.id.match(/([nrw])-\d*/); // temporary id
 
-	                context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
-	                context.enter(modeSelect(context, resultWayIDs));
-	            }
-	        });
-	    }
+	        if (match !== null) {
+	          var nrw = match[1];
+	          var permID;
 
-	    function makeConnectWaysFix(connectionTags) {
+	          do {
+	            permID = nrw + ++nextID[nrw];
+	          } while (baseEntities.hasOwnProperty(permID));
 
-	        var fixTitleID = 'connect_features';
-	        if (connectionTags.ford) {
-	            fixTitleID = 'connect_using_ford';
+	          copy.id = permIDs[source.id] = permID;
 	        }
 
-	        return new validationIssueFix({
-	            icon: 'iD-icon-crossing',
-	            title: _t('issues.fix.' + fixTitleID + '.title'),
-	            onClick: function(context) {
-	                var loc = this.issue.loc;
-	                var connectionTags = this.issue.data.connectionTags;
-	                var edges = this.issue.data.edges;
+	        return copy;
+	      }
+	    },
+	    toJSON: function toJSON() {
+	      if (!this.hasChanges()) return;
+	      var allEntities = {};
+	      var baseEntities = {};
+	      var base = _stack[0];
+
+	      var s = _stack.map(function (i) {
+	        var modified = [];
+	        var deleted = [];
+	        Object.keys(i.graph.entities).forEach(function (id) {
+	          var entity = i.graph.entities[id];
+
+	          if (entity) {
+	            var key = osmEntity.key(entity);
+	            allEntities[key] = entity;
+	            modified.push(key);
+	          } else {
+	            deleted.push(id);
+	          } // make sure that the originals of changed or deleted entities get merged
+	          // into the base of the _stack after restoring the data from JSON.
 
-	                context.perform(
-	                    function actionConnectCrossingWays(graph) {
-	                        // create the new node for the points
-	                        var node = osmNode({ loc: loc, tags: connectionTags });
-	                        graph = graph.replace(node);
-
-	                        var nodesToMerge = [node.id];
-	                        var mergeThresholdInMeters = 0.75;
-
-	                        edges.forEach(function(edge) {
-	                            var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
-	                            var closestNodeInfo = geoSphericalClosestNode(edgeNodes, loc);
-	                            // if there is already a point nearby, use that
-	                            if (closestNodeInfo.distance < mergeThresholdInMeters) {
-	                                nodesToMerge.push(closestNodeInfo.node.id);
-	                            // else add the new node to the way
-	                            } else {
-	                                graph = actionAddMidpoint({loc: loc, edge: edge}, node)(graph);
-	                            }
-	                        });
-
-	                        if (nodesToMerge.length > 1) {
-	                            // if we're using nearby nodes, merge them with the new node
-	                            graph = actionMergeNodes(nodesToMerge, loc)(graph);
-	                        }
-
-	                        return graph;
-	                    },
-	                    _t('issues.fix.connect_crossing_features.annotation')
-	                );
-	            }
-	        });
-	    }
 
-	    function makeChangeLayerFix(higherOrLower) {
-	        return new validationIssueFix({
-	            icon: 'iD-icon-' + (higherOrLower === 'higher' ? 'up' : 'down'),
-	            title: _t('issues.fix.tag_this_as_' + higherOrLower + '.title'),
-	            onClick: function(context) {
+	          if (id in base.graph.entities) {
+	            baseEntities[id] = base.graph.entities[id];
+	          }
+
+	          if (entity && entity.nodes) {
+	            // get originals of pre-existing child nodes
+	            entity.nodes.forEach(function (nodeID) {
+	              if (nodeID in base.graph.entities) {
+	                baseEntities[nodeID] = base.graph.entities[nodeID];
+	              }
+	            });
+	          } // get originals of parent entities too
 
-	                var mode = context.mode();
-	                if (!mode || mode.id !== 'select') { return; }
 
-	                var selectedIDs = mode.selectedIDs();
-	                if (selectedIDs.length !== 1) { return; }
+	          var baseParents = base.graph._parentWays[id];
 
-	                var selectedID = selectedIDs[0];
-	                if (!this.issue.entityIds.some(function(entityId) {
-	                    return entityId === selectedID;
-	                })) { return; }
+	          if (baseParents) {
+	            baseParents.forEach(function (parentID) {
+	              if (parentID in base.graph.entities) {
+	                baseEntities[parentID] = base.graph.entities[parentID];
+	              }
+	            });
+	          }
+	        });
+	        var x = {};
+	        if (modified.length) x.modified = modified;
+	        if (deleted.length) x.deleted = deleted;
+	        if (i.imageryUsed) x.imageryUsed = i.imageryUsed;
+	        if (i.photoOverlaysUsed) x.photoOverlaysUsed = i.photoOverlaysUsed;
+	        if (i.annotation) x.annotation = i.annotation;
+	        if (i.transform) x.transform = i.transform;
+	        if (i.selectedIDs) x.selectedIDs = i.selectedIDs;
+	        return x;
+	      });
 
-	                var entity = context.hasEntity(selectedID);
-	                if (!entity) { return; }
+	      return JSON.stringify({
+	        version: 3,
+	        entities: Object.values(allEntities),
+	        baseEntities: Object.values(baseEntities),
+	        stack: s,
+	        nextIDs: osmEntity.id.next,
+	        index: _index,
+	        // note the time the changes were saved
+	        timestamp: new Date().getTime()
+	      });
+	    },
+	    fromJSON: function fromJSON(json, loadChildNodes) {
+	      var h = JSON.parse(json);
+	      var loadComplete = true;
+	      osmEntity.id.next = h.nextIDs;
+	      _index = h.index;
 
-	                var tags = Object.assign({}, entity.tags);   // shallow copy
-	                var layer = tags.layer && Number(tags.layer);
-	                if (layer && !isNaN(layer)) {
-	                    if (higherOrLower === 'higher') {
-	                        layer += 1;
-	                    } else {
-	                        layer -= 1;
-	                    }
-	                } else {
-	                    if (higherOrLower === 'higher') {
-	                        layer = 1;
-	                    } else {
-	                        layer = -1;
-	                    }
-	                }
-	                tags.layer = layer.toString();
-	                context.perform(
-	                    actionChangeTags(entity.id, tags),
-	                    _t('operations.change_tags.annotation')
-	                );
-	            }
+	      if (h.version === 2 || h.version === 3) {
+	        var allEntities = {};
+	        h.entities.forEach(function (entity) {
+	          allEntities[osmEntity.key(entity)] = osmEntity(entity);
 	        });
-	    }
 
-	    validation.type = type;
+	        if (h.version === 3) {
+	          // This merges originals for changed entities into the base of
+	          // the _stack even if the current _stack doesn't have them (for
+	          // example when iD has been restarted in a different region)
+	          var baseEntities = h.baseEntities.map(function (d) {
+	            return osmEntity(d);
+	          });
 
-	    return validation;
-	}
+	          var stack = _stack.map(function (state) {
+	            return state.graph;
+	          });
 
-	function validationDisconnectedWay() {
-	    var type = 'disconnected_way';
+	          _stack[0].graph.rebase(baseEntities, stack, true);
 
-	    function isTaggedAsHighway(entity) {
-	        return osmRoutableHighwayTagValues[entity.tags.highway];
-	    }
+	          _tree.rebase(baseEntities, true); // When we restore a modified way, we also need to fetch any missing
+	          // childnodes that would normally have been downloaded with it.. #2142
 
-	    var validation = function checkDisconnectedWay(entity, graph) {
 
-	        var routingIslandWays = routingIslandForEntity(entity);
-	        if (!routingIslandWays) { return []; }
+	          if (loadChildNodes) {
+	            var osm = context.connection();
+	            var baseWays = baseEntities.filter(function (e) {
+	              return e.type === 'way';
+	            });
+	            var nodeIDs = baseWays.reduce(function (acc, way) {
+	              return utilArrayUnion(acc, way.nodes);
+	            }, []);
+	            var missing = nodeIDs.filter(function (n) {
+	              return !_stack[0].graph.hasEntity(n);
+	            });
 
-	        return [new validationIssue({
-	            type: type,
-	            subtype: 'highway',
-	            severity: 'warning',
-	            message: function(context) {
-	                if (this.entityIds.length === 1) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.disconnected_way.highway.message', { highway: utilDisplayLabel(entity, context.graph()) }) : '';
-	                }
-	                return _t('issues.disconnected_way.routable.message.multiple', { count: this.entityIds.length.toString() });
-	            },
-	            reference: showReference,
-	            entityIds: Array.from(routingIslandWays).map(function(way) { return way.id; }),
-	            dynamicFixes: makeFixes
-	        })];
+	            if (missing.length && osm) {
+	              loadComplete = false;
+	              context.map().redrawEnable(false);
+	              var loading = uiLoading(context).blocking(true);
+	              context.container().call(loading);
 
+	              var childNodesLoaded = function childNodesLoaded(err, result) {
+	                if (!err) {
+	                  var visibleGroups = utilArrayGroupBy(result.data, 'visible');
+	                  var visibles = visibleGroups["true"] || []; // alive nodes
 
-	        function makeFixes(context) {
+	                  var invisibles = visibleGroups["false"] || []; // deleted nodes
 
-	            var fixes = [];
+	                  if (visibles.length) {
+	                    var visibleIDs = visibles.map(function (entity) {
+	                      return entity.id;
+	                    });
 
-	            var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
+	                    var stack = _stack.map(function (state) {
+	                      return state.graph;
+	                    });
 
-	            if (singleEntity) {
+	                    missing = utilArrayDifference(missing, visibleIDs);
 
-	                if (singleEntity.type === 'way' && !singleEntity.isClosed()) {
+	                    _stack[0].graph.rebase(visibles, stack, true);
 
-	                    var textDirection = _mainLocalizer.textDirection();
+	                    _tree.rebase(visibles, true);
+	                  } // fetch older versions of nodes that were deleted..
 
-	                    var startFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.first(), 'start');
-	                    if (startFix) { fixes.push(startFix); }
 
-	                    var endFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.last(), 'end');
-	                    if (endFix) { fixes.push(endFix); }
+	                  invisibles.forEach(function (entity) {
+	                    osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
+	                  });
 	                }
-	                if (!fixes.length) {
-	                    fixes.push(new validationIssueFix({
-	                        title: _t('issues.fix.connect_feature.title')
-	                    }));
+
+	                if (err || !missing.length) {
+	                  loading.close();
+	                  context.map().redrawEnable(true);
+	                  dispatch.call('change');
+	                  dispatch.call('restore', this);
 	                }
+	              };
 
-	                fixes.push(new validationIssueFix({
-	                    icon: 'iD-operation-delete',
-	                    title: _t('issues.fix.delete_feature.title'),
-	                    entityIds: [singleEntity.id],
-	                    onClick: function(context) {
-	                        var id = this.issue.entityIds[0];
-	                        var operation = operationDelete(context, [id]);
-	                        if (!operation.disabled()) {
-	                            operation();
-	                        }
-	                    }
-	                }));
-	            } else {
-	                fixes.push(new validationIssueFix({
-	                    title: _t('issues.fix.connect_features.title')
-	                }));
+	              osm.loadMultiple(missing, childNodesLoaded);
 	            }
-
-	            return fixes;
+	          }
 	        }
 
+	        _stack = h.stack.map(function (d) {
+	          var entities = {},
+	              entity;
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.disconnected_way.routable.reference'));
-	        }
+	          if (d.modified) {
+	            d.modified.forEach(function (key) {
+	              entity = allEntities[key];
+	              entities[entity.id] = entity;
+	            });
+	          }
 
-	        function routingIslandForEntity(entity) {
+	          if (d.deleted) {
+	            d.deleted.forEach(function (id) {
+	              entities[id] = undefined;
+	            });
+	          }
 
-	            var routingIsland = new Set();  // the interconnected routable features
-	            var waysToCheck = [];           // the queue of remaining routable ways to traverse
+	          return {
+	            graph: coreGraph(_stack[0].graph).load(entities),
+	            annotation: d.annotation,
+	            imageryUsed: d.imageryUsed,
+	            photoOverlaysUsed: d.photoOverlaysUsed,
+	            transform: d.transform,
+	            selectedIDs: d.selectedIDs
+	          };
+	        });
+	      } else {
+	        // original version
+	        _stack = h.stack.map(function (d) {
+	          var entities = {};
 
-	            function queueParentWays(node) {
-	                graph.parentWays(node).forEach(function(parentWay) {
-	                    if (!routingIsland.has(parentWay) &&    // only check each feature once
-	                        isRoutableWay(parentWay, false)) {  // only check routable features
-	                        routingIsland.add(parentWay);
-	                        waysToCheck.push(parentWay);
-	                    }
-	                });
-	            }
+	          for (var i in d.entities) {
+	            var entity = d.entities[i];
+	            entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
+	          }
 
-	            if (entity.type === 'way' && isRoutableWay(entity, true)) {
+	          d.graph = coreGraph(_stack[0].graph).load(entities);
+	          return d;
+	        });
+	      }
 
-	                routingIsland.add(entity);
-	                waysToCheck.push(entity);
+	      var transform = _stack[_index].transform;
 
-	            } else if (entity.type === 'node' && isRoutableNode(entity)) {
+	      if (transform) {
+	        context.map().transformEase(transform, 0); // 0 = immediate, no easing
+	      }
 
-	                routingIsland.add(entity);
-	                queueParentWays(entity);
+	      if (loadComplete) {
+	        dispatch.call('change');
+	        dispatch.call('restore', this);
+	      }
 
-	            } else {
-	                // this feature isn't routable, cannot be a routing island
-	                return null;
-	            }
+	      return history;
+	    },
+	    lock: function lock() {
+	      return _lock.lock();
+	    },
+	    unlock: function unlock() {
+	      _lock.unlock();
+	    },
+	    save: function save() {
+	      if (_lock.locked() && // don't overwrite existing, unresolved changes
+	      !_hasUnresolvedRestorableChanges) {
+	        var success = corePreferences(getKey('saved_history'), history.toJSON() || null);
+	        if (!success) dispatch.call('storage_error');
+	      }
 
-	            while (waysToCheck.length) {
-	                var wayToCheck = waysToCheck.pop();
-	                var childNodes = graph.childNodes(wayToCheck);
-	                for (var i in childNodes) {
-	                    var vertex = childNodes[i];
+	      return history;
+	    },
+	    // delete the history version saved in localStorage
+	    clearSaved: function clearSaved() {
+	      context.debouncedSave.cancel();
 
-	                    if (isConnectedVertex(vertex)) {
-	                        // found a link to the wider network, not a routing island
-	                        return null;
-	                    }
+	      if (_lock.locked()) {
+	        _hasUnresolvedRestorableChanges = false;
+	        corePreferences(getKey('saved_history'), null); // clear the changeset metadata associated with the saved history
 
-	                    if (isRoutableNode(vertex)) {
-	                        routingIsland.add(vertex);
-	                    }
+	        corePreferences('comment', null);
+	        corePreferences('hashtags', null);
+	        corePreferences('source', null);
+	      }
 
-	                    queueParentWays(vertex);
-	                }
-	            }
+	      return history;
+	    },
+	    savedHistoryJSON: function savedHistoryJSON() {
+	      return corePreferences(getKey('saved_history'));
+	    },
+	    hasRestorableChanges: function hasRestorableChanges() {
+	      return _hasUnresolvedRestorableChanges;
+	    },
+	    // load history from a version stored in localStorage
+	    restore: function restore() {
+	      if (_lock.locked()) {
+	        _hasUnresolvedRestorableChanges = false;
+	        var json = this.savedHistoryJSON();
+	        if (json) history.fromJSON(json, true);
+	      }
+	    },
+	    _getKey: getKey
+	  };
+	  history.reset();
+	  return utilRebind(history, dispatch, 'on');
+	}
 
-	            // no network link found, this is a routing island, return its members
-	            return routingIsland;
-	        }
+	/**
+	 * Look for roads that can be connected to other roads with a short extension
+	 */
 
-	        function isConnectedVertex(vertex) {
-	            // assume ways overlapping unloaded tiles are connected to the wider road network  - #5938
-	            var osm = services.osm;
-	            if (osm && !osm.isDataLoaded(vertex.loc)) { return true; }
+	function validationAlmostJunction(context) {
+	  var type = 'almost_junction';
+	  var EXTEND_TH_METERS = 5;
+	  var WELD_TH_METERS = 0.75; // Comes from considering bounding case of parallel ways
 
-	            // entrances are considered connected
-	            if (vertex.tags.entrance &&
-	                vertex.tags.entrance !== 'no') { return true; }
-	            if (vertex.tags.amenity === 'parking_entrance') { return true; }
+	  var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS; // Comes from considering bounding case of perpendicular ways
 
-	            return false;
-	        }
+	  var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
 
-	        function isRoutableNode(node) {
-	            // treat elevators as distinct features in the highway network
-	            if (node.tags.highway === 'elevator') { return true; }
-	            return false;
-	        }
+	  function isHighway(entity) {
+	    return entity.type === 'way' && osmRoutableHighwayTagValues[entity.tags.highway];
+	  }
 
-	        function isRoutableWay(way, ignoreInnerWays) {
-	            if (isTaggedAsHighway(way) || way.tags.route === 'ferry') { return true; }
+	  function isTaggedAsNotContinuing(node) {
+	    return node.tags.noexit === 'yes' || node.tags.amenity === 'parking_entrance' || node.tags.entrance && node.tags.entrance !== 'no';
+	  }
 
-	            return graph.parentRelations(way).some(function(parentRelation) {
-	                if (parentRelation.tags.type === 'route' &&
-	                    parentRelation.tags.route === 'ferry') { return true; }
+	  var validation = function checkAlmostJunction(entity, graph) {
+	    if (!isHighway(entity)) return [];
+	    if (entity.isDegenerate()) return [];
+	    var tree = context.history().tree();
+	    var extendableNodeInfos = findConnectableEndNodesByExtension(entity);
+	    var issues = [];
+	    extendableNodeInfos.forEach(function (extendableNodeInfo) {
+	      issues.push(new validationIssue({
+	        type: type,
+	        subtype: 'highway-highway',
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity1 = context.hasEntity(this.entityIds[0]);
 
-	                if (parentRelation.isMultipolygon() &&
-	                    isTaggedAsHighway(parentRelation) &&
-	                    (!ignoreInnerWays || parentRelation.memberById(way.id).role !== 'inner')) { return true; }
-	            });
-	        }
+	          if (this.entityIds[0] === this.entityIds[2]) {
+	            return entity1 ? _t.html('issues.almost_junction.self.message', {
+	              feature: utilDisplayLabel(entity1, context.graph())
+	            }) : '';
+	          } else {
+	            var entity2 = context.hasEntity(this.entityIds[2]);
+	            return entity1 && entity2 ? _t.html('issues.almost_junction.message', {
+	              feature: utilDisplayLabel(entity1, context.graph()),
+	              feature2: utilDisplayLabel(entity2, context.graph())
+	            }) : '';
+	          }
+	        },
+	        reference: showReference,
+	        entityIds: [entity.id, extendableNodeInfo.node.id, extendableNodeInfo.wid],
+	        loc: extendableNodeInfo.node.loc,
+	        hash: JSON.stringify(extendableNodeInfo.node.loc),
+	        data: {
+	          midId: extendableNodeInfo.mid.id,
+	          edge: extendableNodeInfo.edge,
+	          cross_loc: extendableNodeInfo.cross_loc
+	        },
+	        dynamicFixes: makeFixes
+	      }));
+	    });
+	    return issues;
 
-	        function makeContinueDrawingFixIfAllowed(textDirection, vertexID, whichEnd) {
-	            var vertex = graph.hasEntity(vertexID);
-	            if (!vertex || vertex.tags.noexit === 'yes') { return null; }
+	    function makeFixes(context) {
+	      var fixes = [new validationIssueFix({
+	        icon: 'iD-icon-abutment',
+	        title: _t.html('issues.fix.connect_features.title'),
+	        onClick: function onClick(context) {
+	          var annotation = _t('issues.fix.connect_almost_junction.annotation');
 
-	            var useLeftContinue = (whichEnd === 'start' && textDirection === 'ltr') ||
-	                (whichEnd === 'end' && textDirection === 'rtl');
+	          var _this$issue$entityIds = _slicedToArray(this.issue.entityIds, 3),
+	              endNodeId = _this$issue$entityIds[1],
+	              crossWayId = _this$issue$entityIds[2];
 
-	            return new validationIssueFix({
-	                icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
-	                title: _t('issues.fix.continue_from_' + whichEnd + '.title'),
-	                entityIds: [vertexID],
-	                onClick: function(context) {
-	                    var wayId = this.issue.entityIds[0];
-	                    var way = context.hasEntity(wayId);
-	                    var vertexId = this.entityIds[0];
-	                    var vertex = context.hasEntity(vertexId);
+	          var midNode = context.entity(this.issue.data.midId);
+	          var endNode = context.entity(endNodeId);
+	          var crossWay = context.entity(crossWayId); // When endpoints are close, just join if resulting small change in angle (#7201)
 
-	                    if (!way || !vertex) { return; }
+	          var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
 
-	                    // make sure the vertex is actually visible and editable
-	                    var map = context.map();
-	                    if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
-	                        map.zoomToEase(vertex);
-	                    }
+	          if (nearEndNodes.length > 0) {
+	            var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
 
-	                    context.enter(
-	                        modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true)
-	                    );
-	                }
-	            });
+	            if (collinear) {
+	              context.perform(actionMergeNodes([collinear.id, endNode.id], collinear.loc), annotation);
+	              return;
+	            }
+	          }
+
+	          var targetEdge = this.issue.data.edge;
+	          var crossLoc = this.issue.data.cross_loc;
+	          var edgeNodes = [context.entity(targetEdge[0]), context.entity(targetEdge[1])];
+	          var closestNodeInfo = geoSphericalClosestNode(edgeNodes, crossLoc); // already a point nearby, just connect to that
+
+	          if (closestNodeInfo.distance < WELD_TH_METERS) {
+	            context.perform(actionMergeNodes([closestNodeInfo.node.id, endNode.id], closestNodeInfo.node.loc), annotation); // else add the end node to the edge way
+	          } else {
+	            context.perform(actionAddMidpoint({
+	              loc: crossLoc,
+	              edge: targetEdge
+	            }, endNode), annotation);
+	          }
 	        }
+	      })];
+	      var node = context.hasEntity(this.entityIds[1]);
 
-	    };
+	      if (node && !node.hasInterestingTags()) {
+	        // node has no descriptive tags, suggest noexit fix
+	        fixes.push(new validationIssueFix({
+	          icon: 'maki-barrier',
+	          title: _t.html('issues.fix.tag_as_disconnected.title'),
+	          onClick: function onClick(context) {
+	            var nodeID = this.issue.entityIds[1];
+	            var tags = Object.assign({}, context.entity(nodeID).tags);
+	            tags.noexit = 'yes';
+	            context.perform(actionChangeTags(nodeID, tags), _t('issues.fix.tag_as_disconnected.annotation'));
+	          }
+	        }));
+	      }
 
-	    validation.type = type;
+	      return fixes;
+	    }
 
-	    return validation;
-	}
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.almost_junction.highway-highway.reference'));
+	    }
 
-	function validationFormatting() {
-	    var type = 'invalid_format';
+	    function isExtendableCandidate(node, way) {
+	      // can not accurately test vertices on tiles not downloaded from osm - #5938
+	      var osm = services.osm;
 
-	    var validation = function(entity) {
-	        var issues = [];
+	      if (osm && !osm.isDataLoaded(node.loc)) {
+	        return false;
+	      }
 
-	        function isValidEmail(email) {
-	            // Emails in OSM are going to be official so they should be pretty simple
-	            // Using negated lists to better support all possible unicode characters (#6494)
-	            var valid_email = /^[^\(\)\\,":;<>@\[\]]+@[^\(\)\\,":;<>@\[\]\.]+(?:\.[a-z0-9-]+)*$/i;
+	      if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
+	        return false;
+	      }
 
-	            // An empty value is also acceptable
-	            return (!email || valid_email.test(email));
-	        }
-	        /*
-	        function isSchemePresent(url) {
-	            var valid_scheme = /^https?:\/\//i;
-	            return (!url || valid_scheme.test(url));
-	        }
-	        */
-	        function showReferenceEmail(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.invalid_format.email.reference'));
-	        }
-	        /*
-	        function showReferenceWebsite(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(t('issues.invalid_format.website.reference'));
-	        }
-
-	        if (entity.tags.website) {
-	            // Multiple websites are possible
-	            // If ever we support ES6, arrow functions make this nicer
-	            var websites = entity.tags.website
-	                .split(';')
-	                .map(function(s) { return s.trim(); })
-	                .filter(function(x) { return !isSchemePresent(x); });
-
-	            if (websites.length) {
-	                issues.push(new validationIssue({
-	                    type: type,
-	                    subtype: 'website',
-	                    severity: 'warning',
-	                    message: function(context) {
-	                        var entity = context.hasEntity(this.entityIds[0]);
-	                        return entity ? t('issues.invalid_format.website.message' + this.data,
-	                            { feature: utilDisplayLabel(entity, context.graph()), site: websites.join(', ') }) : '';
-	                    },
-	                    reference: showReferenceWebsite,
-	                    entityIds: [entity.id],
-	                    hash: websites.join(),
-	                    data: (websites.length > 1) ? '_multi' : ''
-	                }));
-	            }
-	        }
-	        */
-	        if (entity.tags.email) {
-	            // Multiple emails are possible
-	            var emails = entity.tags.email
-	                .split(';')
-	                .map(function(s) { return s.trim(); })
-	                .filter(function(x) { return !isValidEmail(x); });
-
-	            if (emails.length) {
-	                issues.push(new validationIssue({
-	                    type: type,
-	                    subtype: 'email',
-	                    severity: 'warning',
-	                    message: function(context) {
-	                        var entity = context.hasEntity(this.entityIds[0]);
-	                        return entity ? _t('issues.invalid_format.email.message' + this.data,
-	                            { feature: utilDisplayLabel(entity, context.graph()), email: emails.join(', ') }) : '';
-	                    },
-	                    reference: showReferenceEmail,
-	                    entityIds: [entity.id],
-	                    hash: emails.join(),
-	                    data: (emails.length > 1) ? '_multi' : ''
-	                }));
-	            }
+	      var occurrences = 0;
+
+	      for (var index in way.nodes) {
+	        if (way.nodes[index] === node.id) {
+	          occurrences += 1;
+
+	          if (occurrences > 1) {
+	            return false;
+	          }
 	        }
+	      }
 
-	        return issues;
-	    };
+	      return true;
+	    }
 
-	    validation.type = type;
+	    function findConnectableEndNodesByExtension(way) {
+	      var results = [];
+	      if (way.isClosed()) return results;
+	      var testNodes;
+	      var indices = [0, way.nodes.length - 1];
+	      indices.forEach(function (nodeIndex) {
+	        var nodeID = way.nodes[nodeIndex];
+	        var node = graph.entity(nodeID);
+	        if (!isExtendableCandidate(node, way)) return;
+	        var connectionInfo = canConnectByExtend(way, nodeIndex);
+	        if (!connectionInfo) return;
+	        testNodes = graph.childNodes(way).slice(); // shallow copy
 
-	    return validation;
-	}
+	        testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc); // don't flag issue if connecting the ways would cause self-intersection
 
-	function validationHelpRequest(context) {
-	    var type = 'help_request';
+	        if (geoHasSelfIntersections(testNodes, nodeID)) return;
+	        results.push(connectionInfo);
+	      });
+	      return results;
+	    }
 
-	    var validation = function checkFixmeTag(entity) {
+	    function findNearbyEndNodes(node, way) {
+	      return [way.nodes[0], way.nodes[way.nodes.length - 1]].map(function (d) {
+	        return graph.entity(d);
+	      }).filter(function (d) {
+	        // Node cannot be near to itself, but other endnode of same way could be
+	        return d.id !== node.id && geoSphericalDistance(node.loc, d.loc) <= CLOSE_NODE_TH;
+	      });
+	    }
 
-	        if (!entity.tags.fixme) { return []; }
+	    function findSmallJoinAngle(midNode, tipNode, endNodes) {
+	      // Both nodes could be close, so want to join whichever is closest to collinear
+	      var joinTo;
+	      var minAngle = Infinity; // Checks midNode -> tipNode -> endNode for collinearity
 
-	        // don't flag fixmes on features added by the user
-	        if (entity.version === undefined) { return []; }
+	      endNodes.forEach(function (endNode) {
+	        var a1 = geoAngle(midNode, tipNode, context.projection) + Math.PI;
+	        var a2 = geoAngle(midNode, endNode, context.projection) + Math.PI;
+	        var diff = Math.max(a1, a2) - Math.min(a1, a2);
 
-	        if (entity.v !== undefined) {
-	            var baseEntity = context.history().base().hasEntity(entity.id);
-	            // don't flag fixmes added by the user on existing features
-	            if (!baseEntity || !baseEntity.tags.fixme) { return []; }
+	        if (diff < minAngle) {
+	          joinTo = endNode;
+	          minAngle = diff;
 	        }
+	      });
+	      /* Threshold set by considering right angle triangle
+	      based on node joining threshold and extension distance */
 
-	        return [new validationIssue({
-	            type: type,
-	            subtype: 'fixme_tag',
-	            severity: 'warning',
-	            message: function(context) {
-	                var entity = context.hasEntity(this.entityIds[0]);
-	                return entity ? _t('issues.fixme_tag.message', { feature: utilDisplayLabel(entity, context.graph()) }) : '';
-	            },
-	            dynamicFixes: function() {
-	                return [
-	                    new validationIssueFix({
-	                        title: _t('issues.fix.address_the_concern.title')
-	                    })
-	                ];
-	            },
-	            reference: showReference,
-	            entityIds: [entity.id]
-	        })];
+	      if (minAngle <= SIG_ANGLE_TH) return joinTo;
+	      return null;
+	    }
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.fixme_tag.reference'));
-	        }
-	    };
+	    function hasTag(tags, key) {
+	      return tags[key] !== undefined && tags[key] !== 'no';
+	    }
+
+	    function canConnectWays(way, way2) {
+	      // allow self-connections
+	      if (way.id === way2.id) return true; // if one is bridge or tunnel, both must be bridge or tunnel
 
-	    validation.type = type;
+	      if ((hasTag(way.tags, 'bridge') || hasTag(way2.tags, 'bridge')) && !(hasTag(way.tags, 'bridge') && hasTag(way2.tags, 'bridge'))) return false;
+	      if ((hasTag(way.tags, 'tunnel') || hasTag(way2.tags, 'tunnel')) && !(hasTag(way.tags, 'tunnel') && hasTag(way2.tags, 'tunnel'))) return false; // must have equivalent layers and levels
 
-	    return validation;
-	}
+	      var layer1 = way.tags.layer || '0',
+	          layer2 = way2.tags.layer || '0';
+	      if (layer1 !== layer2) return false;
+	      var level1 = way.tags.level || '0',
+	          level2 = way2.tags.level || '0';
+	      if (level1 !== level2) return false;
+	      return true;
+	    }
 
-	function validationImpossibleOneway() {
-	    var type = 'impossible_oneway';
+	    function canConnectByExtend(way, endNodeIdx) {
+	      var tipNid = way.nodes[endNodeIdx]; // the 'tip' node for extension point
 
-	    var validation = function checkImpossibleOneway(entity, graph) {
+	      var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2]; // the other node of the edge
 
-	        if (entity.type !== 'way' || entity.geometry(graph) !== 'line') { return []; }
+	      var tipNode = graph.entity(tipNid);
+	      var midNode = graph.entity(midNid);
+	      var lon = tipNode.loc[0];
+	      var lat = tipNode.loc[1];
+	      var lon_range = geoMetersToLon(EXTEND_TH_METERS, lat) / 2;
+	      var lat_range = geoMetersToLat(EXTEND_TH_METERS) / 2;
+	      var queryExtent = geoExtent([[lon - lon_range, lat - lat_range], [lon + lon_range, lat + lat_range]]); // first, extend the edge of [midNode -> tipNode] by EXTEND_TH_METERS and find the "extended tip" location
 
-	        if (entity.isClosed()) { return []; }
+	      var edgeLen = geoSphericalDistance(midNode.loc, tipNode.loc);
+	      var t = EXTEND_TH_METERS / edgeLen + 1.0;
+	      var extTipLoc = geoVecInterp(midNode.loc, tipNode.loc, t); // then, check if the extension part [tipNode.loc -> extTipLoc] intersects any other ways
 
-	        if (!typeForWay(entity)) { return []; }
+	      var segmentInfos = tree.waySegments(queryExtent, graph);
 
-	        if (!isOneway(entity)) { return []; }
+	      for (var i = 0; i < segmentInfos.length; i++) {
+	        var segmentInfo = segmentInfos[i];
+	        var way2 = graph.entity(segmentInfo.wayId);
+	        if (!isHighway(way2)) continue;
+	        if (!canConnectWays(way, way2)) continue;
+	        var nAid = segmentInfo.nodes[0],
+	            nBid = segmentInfo.nodes[1];
+	        if (nAid === tipNid || nBid === tipNid) continue;
+	        var nA = graph.entity(nAid),
+	            nB = graph.entity(nBid);
+	        var crossLoc = geoLineIntersection([tipNode.loc, extTipLoc], [nA.loc, nB.loc]);
 
-	        var firstIssues = issuesForNode(entity, entity.first());
-	        var lastIssues = issuesForNode(entity, entity.last());
+	        if (crossLoc) {
+	          return {
+	            mid: midNode,
+	            node: tipNode,
+	            wid: way2.id,
+	            edge: [nA.id, nB.id],
+	            cross_loc: crossLoc
+	          };
+	        }
+	      }
 
-	        return firstIssues.concat(lastIssues);
+	      return null;
+	    }
+	  };
 
-	        function typeForWay(way) {
-	            if (way.geometry(graph) !== 'line') { return null; }
+	  validation.type = type;
+	  return validation;
+	}
 
-	            if (osmRoutableHighwayTagValues[way.tags.highway]) { return 'highway'; }
-	            if (osmFlowingWaterwayTagValues[way.tags.waterway]) { return 'waterway'; }
-	            return null;
-	        }
+	function validationCloseNodes(context) {
+	  var type = 'close_nodes';
+	  var pointThresholdMeters = 0.2;
 
-	        function isOneway(way) {
-	            if (way.tags.oneway === 'yes') { return true; }
-	            if (way.tags.oneway) { return false; }
+	  var validation = function validation(entity, graph) {
+	    if (entity.type === 'node') {
+	      return getIssuesForNode(entity);
+	    } else if (entity.type === 'way') {
+	      return getIssuesForWay(entity);
+	    }
 
-	            for (var key in way.tags) {
-	                if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
+	    return [];
 
-	        function nodeOccursMoreThanOnce(way, nodeID) {
-	            var occurences = 0;
-	            for (var index in way.nodes) {
-	                if (way.nodes[index] === nodeID) {
-	                    occurences += 1;
-	                    if (occurences > 1) { return true; }
-	                }
-	            }
-	            return false;
-	        }
+	    function getIssuesForNode(node) {
+	      var parentWays = graph.parentWays(node);
 
-	        function isConnectedViaOtherTypes(way, node) {
+	      if (parentWays.length) {
+	        return getIssuesForVertex(node, parentWays);
+	      } else {
+	        return getIssuesForDetachedPoint(node);
+	      }
+	    }
 
-	            var wayType = typeForWay(way);
+	    function wayTypeFor(way) {
+	      if (way.tags.boundary && way.tags.boundary !== 'no') return 'boundary';
+	      if (way.tags.indoor && way.tags.indoor !== 'no') return 'indoor';
+	      if (way.tags.building && way.tags.building !== 'no' || way.tags['building:part'] && way.tags['building:part'] !== 'no') return 'building';
+	      if (osmPathHighwayTagValues[way.tags.highway]) return 'path';
+	      var parentRelations = graph.parentRelations(way);
 
-	            if (wayType === 'highway') {
-	                // entrances are considered connected
-	                if (node.tags.entrance && node.tags.entrance !== 'no') { return true; }
-	                if (node.tags.amenity === 'parking_entrance') { return true; }
-	            } else if (wayType === 'waterway') {
-	                if (node.id === way.first()) {
-	                    // multiple waterways may start at the same spring
-	                    if (node.tags.natural === 'spring') { return true; }
-	                } else {
-	                    // multiple waterways may end at the same drain
-	                    if (node.tags.manhole === 'drain') { return true; }
-	                }
-	            }
+	      for (var i in parentRelations) {
+	        var relation = parentRelations[i];
+	        if (relation.tags.type === 'boundary') return 'boundary';
 
-	            return graph.parentWays(node).some(function(parentWay) {
-	                if (parentWay.id === way.id) { return false; }
+	        if (relation.isMultipolygon()) {
+	          if (relation.tags.indoor && relation.tags.indoor !== 'no') return 'indoor';
+	          if (relation.tags.building && relation.tags.building !== 'no' || relation.tags['building:part'] && relation.tags['building:part'] !== 'no') return 'building';
+	        }
+	      }
 
-	                if (wayType === 'highway') {
+	      return 'other';
+	    }
 
-	                    // allow connections to highway areas
-	                    if (parentWay.geometry(graph) === 'area' &&
-	                        osmRoutableHighwayTagValues[parentWay.tags.highway]) { return true; }
+	    function shouldCheckWay(way) {
+	      // don't flag issues where merging would create degenerate ways
+	      if (way.nodes.length <= 2 || way.isClosed() && way.nodes.length <= 4) return false;
+	      var bbox = way.extent(graph).bbox();
+	      var hypotenuseMeters = geoSphericalDistance([bbox.minX, bbox.minY], [bbox.maxX, bbox.maxY]); // don't flag close nodes in very small ways
 
-	                    // count connections to ferry routes as connected
-	                    if (parentWay.tags.route === 'ferry') { return true; }
+	      if (hypotenuseMeters < 1.5) return false;
+	      return true;
+	    }
 
-	                    return graph.parentRelations(parentWay).some(function(parentRelation) {
-	                        if (parentRelation.tags.type === 'route' &&
-	                            parentRelation.tags.route === 'ferry') { return true; }
+	    function getIssuesForWay(way) {
+	      if (!shouldCheckWay(way)) return [];
+	      var issues = [],
+	          nodes = graph.childNodes(way);
 
-	                        // allow connections to highway multipolygons
-	                        return parentRelation.isMultipolygon() && osmRoutableHighwayTagValues[parentRelation.tags.highway];
-	                    });
-	                } else if (wayType === 'waterway') {
-	                    // multiple waterways may start or end at a water body at the same node
-	                    if (parentWay.tags.natural === 'water' ||
-	                        parentWay.tags.natural === 'coastline') { return true; }
-	                }
-	                return false;
-	            });
-	        }
+	      for (var i = 0; i < nodes.length - 1; i++) {
+	        var node1 = nodes[i];
+	        var node2 = nodes[i + 1];
+	        var issue = getWayIssueIfAny(node1, node2, way);
+	        if (issue) issues.push(issue);
+	      }
 
-	        function issuesForNode(way, nodeID) {
+	      return issues;
+	    }
 
-	            var isFirst = nodeID === way.first();
+	    function getIssuesForVertex(node, parentWays) {
+	      var issues = [];
 
-	            var wayType = typeForWay(way);
+	      function checkForCloseness(node1, node2, way) {
+	        var issue = getWayIssueIfAny(node1, node2, way);
+	        if (issue) issues.push(issue);
+	      }
 
-	            // ignore if this way is self-connected at this node
-	            if (nodeOccursMoreThanOnce(way, nodeID)) { return []; }
+	      for (var i = 0; i < parentWays.length; i++) {
+	        var parentWay = parentWays[i];
+	        if (!shouldCheckWay(parentWay)) continue;
+	        var lastIndex = parentWay.nodes.length - 1;
 
-	            var osm = services.osm;
-	            if (!osm) { return []; }
+	        for (var j = 0; j < parentWay.nodes.length; j++) {
+	          if (j !== 0) {
+	            if (parentWay.nodes[j - 1] === node.id) {
+	              checkForCloseness(node, graph.entity(parentWay.nodes[j]), parentWay);
+	            }
+	          }
 
-	            var node = graph.hasEntity(nodeID);
+	          if (j !== lastIndex) {
+	            if (parentWay.nodes[j + 1] === node.id) {
+	              checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
+	            }
+	          }
+	        }
+	      }
 
-	            // ignore if this node or its tile are unloaded
-	            if (!node || !osm.isDataLoaded(node.loc)) { return []; }
+	      return issues;
+	    }
 
-	            if (isConnectedViaOtherTypes(way, node)) { return []; }
+	    function thresholdMetersForWay(way) {
+	      if (!shouldCheckWay(way)) return 0;
+	      var wayType = wayTypeFor(way); // don't flag boundaries since they might be highly detailed and can't be easily verified
 
-	            var attachedWaysOfSameType = graph.parentWays(node).filter(function(parentWay) {
-	                if (parentWay.id === way.id) { return false; }
-	                return typeForWay(parentWay) === wayType;
-	            });
+	      if (wayType === 'boundary') return 0; // expect some features to be mapped with higher levels of detail
 
-	            // assume it's okay for waterways to start or end disconnected for now
-	            if (wayType === 'waterway' && attachedWaysOfSameType.length === 0) { return []; }
+	      if (wayType === 'indoor') return 0.01;
+	      if (wayType === 'building') return 0.05;
+	      if (wayType === 'path') return 0.1;
+	      return 0.2;
+	    }
 
-	            var attachedOneways = attachedWaysOfSameType.filter(function(attachedWay) {
-	                return isOneway(attachedWay);
-	            });
+	    function getIssuesForDetachedPoint(node) {
+	      var issues = [];
+	      var lon = node.loc[0];
+	      var lat = node.loc[1];
+	      var lon_range = geoMetersToLon(pointThresholdMeters, lat) / 2;
+	      var lat_range = geoMetersToLat(pointThresholdMeters) / 2;
+	      var queryExtent = geoExtent([[lon - lon_range, lat - lat_range], [lon + lon_range, lat + lat_range]]);
+	      var intersected = context.history().tree().intersects(queryExtent, graph);
 
-	            // ignore if the way is connected to some non-oneway features
-	            if (attachedOneways.length < attachedWaysOfSameType.length) { return []; }
+	      for (var j = 0; j < intersected.length; j++) {
+	        var nearby = intersected[j];
+	        if (nearby.id === node.id) continue;
+	        if (nearby.type !== 'node' || nearby.geometry(graph) !== 'point') continue;
 
-	            if (attachedOneways.length) {
-	                var connectedEndpointsOkay = attachedOneways.some(function(attachedOneway) {
-	                    if ((isFirst ? attachedOneway.first() : attachedOneway.last()) !== nodeID) { return true; }
-	                    if (nodeOccursMoreThanOnce(attachedOneway, nodeID)) { return true; }
-	                    return false;
-	                });
-	                if (connectedEndpointsOkay) { return []; }
-	            }
+	        if (nearby.loc === node.loc || geoSphericalDistance(node.loc, nearby.loc) < pointThresholdMeters) {
+	          // allow very close points if tags indicate the z-axis might vary
+	          var zAxisKeys = {
+	            layer: true,
+	            level: true,
+	            'addr:housenumber': true,
+	            'addr:unit': true
+	          };
+	          var zAxisDifferentiates = false;
 
-	            var placement = isFirst ? 'start' : 'end',
-	                messageID = wayType + '.',
-	                referenceID = wayType + '.';
+	          for (var key in zAxisKeys) {
+	            var nodeValue = node.tags[key] || '0';
+	            var nearbyValue = nearby.tags[key] || '0';
 
-	            if (wayType === 'waterway') {
-	                messageID += 'connected.' + placement;
-	                referenceID += 'connected';
-	            } else {
-	                messageID += placement;
-	                referenceID += placement;
+	            if (nodeValue !== nearbyValue) {
+	              zAxisDifferentiates = true;
+	              break;
 	            }
+	          }
 
-	            return [new validationIssue({
-	                type: type,
-	                subtype: wayType,
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.impossible_oneway.' + messageID + '.message', {
-	                        feature: utilDisplayLabel(entity, context.graph())
-	                    }) : '';
-	                },
-	                reference: getReference(referenceID),
-	                entityIds: [way.id, node.id],
-	                dynamicFixes: function() {
-
-	                    var fixes = [];
-
-	                    if (attachedOneways.length) {
-	                        fixes.push(new validationIssueFix({
-	                            icon: 'iD-operation-reverse',
-	                            title: _t('issues.fix.reverse_feature.title'),
-	                            entityIds: [way.id],
-	                            onClick: function(context) {
-	                                var id = this.issue.entityIds[0];
-	                                context.perform(actionReverse(id), _t('operations.reverse.annotation'));
-	                            }
-	                        }));
-	                    }
-	                    if (node.tags.noexit !== 'yes') {
-	                        var textDirection = _mainLocalizer.textDirection();
-	                        var useLeftContinue = (isFirst && textDirection === 'ltr') ||
-	                            (!isFirst && textDirection === 'rtl');
-	                        fixes.push(new validationIssueFix({
-	                            icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
-	                            title: _t('issues.fix.continue_from_' + (isFirst ? 'start' : 'end') + '.title'),
-	                            onClick: function(context) {
-	                                var entityID = this.issue.entityIds[0];
-	                                var vertexID = this.issue.entityIds[1];
-	                                var way = context.entity(entityID);
-	                                var vertex = context.entity(vertexID);
-	                                continueDrawing(way, vertex, context);
-	                            }
-	                        }));
-	                    }
-
-	                    return fixes;
-	                },
-	                loc: node.loc
-	            })];
-
-	            function getReference(referenceID) {
-	                return function showReference(selection) {
-	                    selection.selectAll('.issue-reference')
-	                        .data([0])
-	                        .enter()
-	                        .append('div')
-	                        .attr('class', 'issue-reference')
-	                        .text(_t('issues.impossible_oneway.' + referenceID + '.reference'));
-	                };
+	          if (zAxisDifferentiates) continue;
+	          issues.push(new validationIssue({
+	            type: type,
+	            subtype: 'detached',
+	            severity: 'warning',
+	            message: function message(context) {
+	              var entity = context.hasEntity(this.entityIds[0]),
+	                  entity2 = context.hasEntity(this.entityIds[1]);
+	              return entity && entity2 ? _t.html('issues.close_nodes.detached.message', {
+	                feature: utilDisplayLabel(entity, context.graph()),
+	                feature2: utilDisplayLabel(entity2, context.graph())
+	              }) : '';
+	            },
+	            reference: showReference,
+	            entityIds: [node.id, nearby.id],
+	            dynamicFixes: function dynamicFixes() {
+	              return [new validationIssueFix({
+	                icon: 'iD-operation-disconnect',
+	                title: _t.html('issues.fix.move_points_apart.title')
+	              }), new validationIssueFix({
+	                icon: 'iD-icon-layers',
+	                title: _t.html('issues.fix.use_different_layers_or_levels.title')
+	              })];
 	            }
+	          }));
 	        }
-	    };
+	      }
 
-	    function continueDrawing(way, vertex, context) {
-	        // make sure the vertex is actually visible and editable
-	        var map = context.map();
-	        if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
-	            map.zoomToEase(vertex);
-	        }
+	      return issues;
 
-	        context.enter(
-	            modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true)
-	        );
+	      function showReference(selection) {
+	        var referenceText = _t('issues.close_nodes.detached.reference');
+	        selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(referenceText);
+	      }
 	    }
 
-	    validation.type = type;
+	    function getWayIssueIfAny(node1, node2, way) {
+	      if (node1.id === node2.id || node1.hasInterestingTags() && node2.hasInterestingTags()) {
+	        return null;
+	      }
 
-	    return validation;
-	}
+	      if (node1.loc !== node2.loc) {
+	        var parentWays1 = graph.parentWays(node1);
+	        var parentWays2 = new Set(graph.parentWays(node2));
+	        var sharedWays = parentWays1.filter(function (parentWay) {
+	          return parentWays2.has(parentWay);
+	        });
+	        var thresholds = sharedWays.map(function (parentWay) {
+	          return thresholdMetersForWay(parentWay);
+	        });
+	        var threshold = Math.min.apply(Math, _toConsumableArray(thresholds));
+	        var distance = geoSphericalDistance(node1.loc, node2.loc);
+	        if (distance > threshold) return null;
+	      }
 
-	function validationIncompatibleSource() {
-	    var type = 'incompatible_source';
-	    var invalidSources = [
-	        {
-	            id:'google', regex:'google', exceptRegex: 'books.google|Google Books|drive.google|googledrive|Google Drive'
+	      return new validationIssue({
+	        type: type,
+	        subtype: 'vertices',
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.close_nodes.message', {
+	            way: utilDisplayLabel(entity, context.graph())
+	          }) : '';
+	        },
+	        reference: showReference,
+	        entityIds: [way.id, node1.id, node2.id],
+	        loc: node1.loc,
+	        dynamicFixes: function dynamicFixes() {
+	          return [new validationIssueFix({
+	            icon: 'iD-icon-plus',
+	            title: _t.html('issues.fix.merge_points.title'),
+	            onClick: function onClick(context) {
+	              var entityIds = this.issue.entityIds;
+	              var action = actionMergeNodes([entityIds[1], entityIds[2]]);
+	              context.perform(action, _t('issues.fix.merge_close_vertices.annotation'));
+	            }
+	          }), new validationIssueFix({
+	            icon: 'iD-operation-disconnect',
+	            title: _t.html('issues.fix.move_points_apart.title')
+	          })];
 	        }
-	    ];
+	      });
 
-	    var validation = function checkIncompatibleSource(entity) {
+	      function showReference(selection) {
+	        var referenceText = _t('issues.close_nodes.reference');
+	        selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(referenceText);
+	      }
+	    }
+	  };
 
-	        var entitySources = entity.tags && entity.tags.source && entity.tags.source.split(';');
+	  validation.type = type;
+	  return validation;
+	}
 
-	        if (!entitySources) { return []; }
+	function validationCrossingWays(context) {
+	  var type = 'crossing_ways'; // returns the way or its parent relation, whichever has a useful feature type
 
-	        var issues = [];
+	  function getFeatureWithFeatureTypeTagsForWay(way, graph) {
+	    if (getFeatureType(way, graph) === null) {
+	      // if the way doesn't match a feature type, check its parent relations
+	      var parentRels = graph.parentRelations(way);
 
-	        invalidSources.forEach(function(invalidSource) {
+	      for (var i = 0; i < parentRels.length; i++) {
+	        var rel = parentRels[i];
 
-	            var hasInvalidSource = entitySources.some(function(source) {
-	                if (!source.match(new RegExp(invalidSource.regex, 'i'))) { return false; }
-	                if (invalidSource.exceptRegex && source.match(new RegExp(invalidSource.exceptRegex, 'i'))) { return false; }
-	                return true;
-	            });
+	        if (getFeatureType(rel, graph) !== null) {
+	          return rel;
+	        }
+	      }
+	    }
 
-	            if (!hasInvalidSource) { return; }
+	    return way;
+	  }
 
-	            issues.push(new validationIssue({
-	                type: type,
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.incompatible_source.' + invalidSource.id + '.feature.message', {
-	                        feature: utilDisplayLabel(entity, context.graph())
-	                    }) : '';
-	                },
-	                reference: getReference(invalidSource.id),
-	                entityIds: [entity.id],
-	                dynamicFixes: function() {
-	                    return [
-	                        new validationIssueFix({
-	                            title: _t('issues.fix.remove_proprietary_data.title')
-	                        })
-	                    ];
-	                }
-	            }));
-	        });
+	  function hasTag(tags, key) {
+	    return tags[key] !== undefined && tags[key] !== 'no';
+	  }
 
-	        return issues;
+	  function taggedAsIndoor(tags) {
+	    return hasTag(tags, 'indoor') || hasTag(tags, 'level') || tags.highway === 'corridor';
+	  }
 
+	  function allowsBridge(featureType) {
+	    return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+	  }
 
-	        function getReference(id) {
-	            return function showReference(selection) {
-	                selection.selectAll('.issue-reference')
-	                    .data([0])
-	                    .enter()
-	                    .append('div')
-	                    .attr('class', 'issue-reference')
-	                    .text(_t('issues.incompatible_source.' + id + '.reference'));
-	            };
-	        }
-	    };
+	  function allowsTunnel(featureType) {
+	    return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+	  } // discard
 
-	    validation.type = type;
 
-	    return validation;
-	}
+	  var ignoredBuildings = {
+	    demolished: true,
+	    dismantled: true,
+	    proposed: true,
+	    razed: true
+	  };
 
-	function validationMaprules() {
-	    var type = 'maprules';
+	  function getFeatureType(entity, graph) {
+	    var geometry = entity.geometry(graph);
+	    if (geometry !== 'line' && geometry !== 'area') return null;
+	    var tags = entity.tags;
+	    if (hasTag(tags, 'building') && !ignoredBuildings[tags.building]) return 'building';
+	    if (hasTag(tags, 'highway') && osmRoutableHighwayTagValues[tags.highway]) return 'highway'; // don't check railway or waterway areas
 
-	    var validation = function checkMaprules(entity, graph) {
-	        if (!services.maprules) { return []; }
+	    if (geometry !== 'line') return null;
+	    if (hasTag(tags, 'railway') && osmRailwayTrackTagValues[tags.railway]) return 'railway';
+	    if (hasTag(tags, 'waterway') && osmFlowingWaterwayTagValues[tags.waterway]) return 'waterway';
+	    return null;
+	  }
 
-	        var rules = services.maprules.validationRules();
-	        var issues = [];
+	  function isLegitCrossing(tags1, featureType1, tags2, featureType2) {
+	    // assume 0 by default
+	    var level1 = tags1.level || '0';
+	    var level2 = tags2.level || '0';
 
-	        for (var i = 0; i < rules.length; i++) {
-	            var rule = rules[i];
-	            rule.findIssues(entity, graph, issues);
-	        }
+	    if (taggedAsIndoor(tags1) && taggedAsIndoor(tags2) && level1 !== level2) {
+	      // assume features don't interact if they're indoor on different levels
+	      return true;
+	    } // assume 0 by default; don't use way.layer() since we account for structures here
 
-	        return issues;
-	    };
 
+	    var layer1 = tags1.layer || '0';
+	    var layer2 = tags2.layer || '0';
 
-	    validation.type = type;
+	    if (allowsBridge(featureType1) && allowsBridge(featureType2)) {
+	      if (hasTag(tags1, 'bridge') && !hasTag(tags2, 'bridge')) return true;
+	      if (!hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge')) return true; // crossing bridges must use different layers
 
-	    return validation;
-	}
+	      if (hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge') && layer1 !== layer2) return true;
+	    } else if (allowsBridge(featureType1) && hasTag(tags1, 'bridge')) return true;else if (allowsBridge(featureType2) && hasTag(tags2, 'bridge')) return true;
 
-	function validationMismatchedGeometry() {
-	    var type = 'mismatched_geometry';
+	    if (allowsTunnel(featureType1) && allowsTunnel(featureType2)) {
+	      if (hasTag(tags1, 'tunnel') && !hasTag(tags2, 'tunnel')) return true;
+	      if (!hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel')) return true; // crossing tunnels must use different layers
 
-	    function tagSuggestingLineIsArea(entity) {
-	        if (entity.type !== 'way' || entity.isClosed()) { return null; }
+	      if (hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel') && layer1 !== layer2) return true;
+	    } else if (allowsTunnel(featureType1) && hasTag(tags1, 'tunnel')) return true;else if (allowsTunnel(featureType2) && hasTag(tags2, 'tunnel')) return true; // don't flag crossing waterways and pier/highways
 
-	        var tagSuggestingArea = entity.tagSuggestingArea();
-	        if (!tagSuggestingArea) {
-	            return null;
-	        }
 
-	        var asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
-	        var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');
-	        if (asLine && asArea && (asLine === asArea)) {
-	            // these tags also allow lines and making this an area wouldn't matter
-	            return null;
-	        }
+	    if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') return true;
+	    if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') return true;
 
-	        return tagSuggestingArea;
+	    if (featureType1 === 'building' || featureType2 === 'building') {
+	      // for building crossings, different layers are enough
+	      if (layer1 !== layer2) return true;
 	    }
 
+	    return false;
+	  } // highway values for which we shouldn't recommend connecting to waterways
 
-	    function makeConnectEndpointsFixOnClick(way, graph) {
-	        // must have at least three nodes to close this automatically
-	        if (way.nodes.length < 3) { return null; }
 
-	        var nodes = graph.childNodes(way), testNodes;
-	        var firstToLastDistanceMeters = geoSphericalDistance(nodes[0].loc, nodes[nodes.length-1].loc);
+	  var highwaysDisallowingFords = {
+	    motorway: true,
+	    motorway_link: true,
+	    trunk: true,
+	    trunk_link: true,
+	    primary: true,
+	    primary_link: true,
+	    secondary: true,
+	    secondary_link: true
+	  };
+	  var nonCrossingHighways = {
+	    track: true
+	  };
 
-	        // if the distance is very small, attempt to merge the endpoints
-	        if (firstToLastDistanceMeters < 0.75) {
-	            testNodes = nodes.slice();   // shallow copy
-	            testNodes.pop();
-	            testNodes.push(testNodes[0]);
-	            // make sure this will not create a self-intersection
-	            if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
-	                return function(context) {
-	                    var way = context.entity(this.issue.entityIds[0]);
-	                    context.perform(
-	                        actionMergeNodes([way.nodes[0], way.nodes[way.nodes.length-1]], nodes[0].loc),
-	                        _t('issues.fix.connect_endpoints.annotation')
-	                    );
-	                };
-	            }
-	        }
+	  function tagsForConnectionNodeIfAllowed(entity1, entity2, graph) {
+	    var featureType1 = getFeatureType(entity1, graph);
+	    var featureType2 = getFeatureType(entity2, graph);
+	    var geometry1 = entity1.geometry(graph);
+	    var geometry2 = entity2.geometry(graph);
+	    var bothLines = geometry1 === 'line' && geometry2 === 'line';
 
-	        // if the points were not merged, attempt to close the way
-	        testNodes = nodes.slice();   // shallow copy
-	        testNodes.push(testNodes[0]);
-	        // make sure this will not create a self-intersection
-	        if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
-	            return function(context) {
-	                var wayId = this.issue.entityIds[0];
-	                var way = context.entity(wayId);
-	                var nodeId = way.nodes[0];
-	                var index = way.nodes.length;
-	                context.perform(
-	                    actionAddVertex(wayId, nodeId, index),
-	                    _t('issues.fix.connect_endpoints.annotation')
-	                );
-	            };
-	        }
-	    }
+	    if (featureType1 === featureType2) {
+	      if (featureType1 === 'highway') {
+	        var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
+	        var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];
 
-	    function lineTaggedAsAreaIssue(entity) {
+	        if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
+	          // one feature is a path but not both
+	          var roadFeature = entity1IsPath ? entity2 : entity1;
 
-	        var tagSuggestingArea = tagSuggestingLineIsArea(entity);
-	        if (!tagSuggestingArea) { return null; }
+	          if (nonCrossingHighways[roadFeature.tags.highway]) {
+	            // don't mark path connections with certain roads as crossings
+	            return {};
+	          }
 
-	        return new validationIssue({
-	            type: type,
-	            subtype: 'area_as_line',
-	            severity: 'warning',
-	            message: function(context) {
-	                var entity = context.hasEntity(this.entityIds[0]);
-	                return entity ? _t('issues.tag_suggests_area.message', {
-	                    feature: utilDisplayLabel(entity, context.graph()),
-	                    tag: utilTagText({ tags: tagSuggestingArea })
-	                }) : '';
-	            },
-	            reference: showReference,
-	            entityIds: [entity.id],
-	            hash: JSON.stringify(tagSuggestingArea),
-	            dynamicFixes: function(context) {
+	          var pathFeature = entity1IsPath ? entity1 : entity2;
 
-	                var fixes = [];
+	          if (['marked', 'unmarked'].indexOf(pathFeature.tags.crossing) !== -1) {
+	            // if the path is a crossing, match the crossing type
+	            return bothLines ? {
+	              highway: 'crossing',
+	              crossing: pathFeature.tags.crossing
+	            } : {};
+	          } // don't add a `crossing` subtag to ambiguous crossings
 
-	                var entity = context.entity(this.entityIds[0]);
-	                var connectEndsOnClick = makeConnectEndpointsFixOnClick(entity, context.graph());
 
-	                fixes.push(new validationIssueFix({
-	                    title: _t('issues.fix.connect_endpoints.title'),
-	                    onClick: connectEndsOnClick
-	                }));
+	          return bothLines ? {
+	            highway: 'crossing'
+	          } : {};
+	        }
 
-	                fixes.push(new validationIssueFix({
-	                    icon: 'iD-operation-delete',
-	                    title: _t('issues.fix.remove_tag.title'),
-	                    onClick: function(context) {
-	                        var entityId = this.issue.entityIds[0];
-	                        var entity = context.entity(entityId);
-	                        var tags = Object.assign({}, entity.tags);  // shallow copy
-	                        for (var key in tagSuggestingArea) {
-	                            delete tags[key];
-	                        }
-	                        context.perform(
-	                            actionChangeTags(entityId, tags),
-	                            _t('issues.fix.remove_tag.annotation')
-	                        );
-	                    }
-	                }));
+	        return {};
+	      }
 
-	                return fixes;
-	            }
-	        });
+	      if (featureType1 === 'waterway') return {};
+	      if (featureType1 === 'railway') return {};
+	    } else {
+	      var featureTypes = [featureType1, featureType2];
 
+	      if (featureTypes.indexOf('highway') !== -1) {
+	        if (featureTypes.indexOf('railway') !== -1) {
+	          if (!bothLines) return {};
+	          var isTram = entity1.tags.railway === 'tram' || entity2.tags.railway === 'tram';
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.tag_suggests_area.reference'));
-	        }
-	    }
+	          if (osmPathHighwayTagValues[entity1.tags.highway] || osmPathHighwayTagValues[entity2.tags.highway]) {
+	            // path-tram connections use this tag
+	            if (isTram) return {
+	              railway: 'tram_crossing'
+	            }; // other path-rail connections use this tag
 
-	    function vertexTaggedAsPointIssue(entity, graph) {
-	        // we only care about nodes
-	        if (entity.type !== 'node') { return null; }
+	            return {
+	              railway: 'crossing'
+	            };
+	          } else {
+	            // path-tram connections use this tag
+	            if (isTram) return {
+	              railway: 'tram_level_crossing'
+	            }; // other road-rail connections use this tag
 
-	        // ignore tagless points
-	        if (Object.keys(entity.tags).length === 0) { return null; }
+	            return {
+	              railway: 'level_crossing'
+	            };
+	          }
+	        }
 
-	        // address lines are special so just ignore them
-	        if (entity.isOnAddressLine(graph)) { return null; }
+	        if (featureTypes.indexOf('waterway') !== -1) {
+	          // do not allow fords on structures
+	          if (hasTag(entity1.tags, 'tunnel') && hasTag(entity2.tags, 'tunnel')) return null;
+	          if (hasTag(entity1.tags, 'bridge') && hasTag(entity2.tags, 'bridge')) return null;
 
-	        var geometry = entity.geometry(graph);
-	        var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
+	          if (highwaysDisallowingFords[entity1.tags.highway] || highwaysDisallowingFords[entity2.tags.highway]) {
+	            // do not allow fords on major highways
+	            return null;
+	          }
 
-	        if (geometry === 'point' && !allowedGeometries.point && allowedGeometries.vertex) {
+	          return bothLines ? {
+	            ford: 'yes'
+	          } : {};
+	        }
+	      }
+	    }
 
-	            return new validationIssue({
-	                type: type,
-	                subtype: 'vertex_as_point',
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.vertex_as_point.message', {
-	                        feature: utilDisplayLabel(entity, context.graph())
-	                    }) : '';
-	                },
-	                reference: function showReference(selection) {
-	                    selection.selectAll('.issue-reference')
-	                        .data([0])
-	                        .enter()
-	                        .append('div')
-	                        .attr('class', 'issue-reference')
-	                        .text(_t('issues.vertex_as_point.reference'));
-	                },
-	                entityIds: [entity.id]
-	            });
+	    return null;
+	  }
 
-	        } else if (geometry === 'vertex' && !allowedGeometries.vertex && allowedGeometries.point) {
+	  function findCrossingsByWay(way1, graph, tree) {
+	    var edgeCrossInfos = [];
+	    if (way1.type !== 'way') return edgeCrossInfos;
+	    var taggedFeature1 = getFeatureWithFeatureTypeTagsForWay(way1, graph);
+	    var way1FeatureType = getFeatureType(taggedFeature1, graph);
+	    if (way1FeatureType === null) return edgeCrossInfos;
+	    var checkedSingleCrossingWays = {}; // declare vars ahead of time to reduce garbage collection
 
-	            return new validationIssue({
-	                type: type,
-	                subtype: 'point_as_vertex',
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.point_as_vertex.message', {
-	                        feature: utilDisplayLabel(entity, context.graph())
-	                    }) : '';
-	                },
-	                reference: function showReference(selection) {
-	                    selection.selectAll('.issue-reference')
-	                        .data([0])
-	                        .enter()
-	                        .append('div')
-	                        .attr('class', 'issue-reference')
-	                        .text(_t('issues.point_as_vertex.reference'));
-	                },
-	                entityIds: [entity.id],
-	                dynamicFixes: function(context) {
-
-	                    var entityId = this.entityIds[0];
-
-	                    var extractOnClick = null;
-	                    if (!context.hasHiddenConnections(entityId)) {
-
-	                        extractOnClick = function(context) {
-	                            var entityId = this.issue.entityIds[0];
-	                            var action = actionExtract(entityId);
-	                            context.perform(
-	                                action,
-	                                _t('operations.extract.annotation.single')
-	                            );
-	                            // re-enter mode to trigger updates
-	                            context.enter(modeSelect(context, [action.getExtractedNodeID()]));
-	                        };
-	                    }
+	    var i, j;
+	    var extent;
+	    var n1, n2, nA, nB, nAId, nBId;
+	    var segment1, segment2;
+	    var oneOnly;
+	    var segmentInfos, segment2Info, way2, taggedFeature2, way2FeatureType;
+	    var way1Nodes = graph.childNodes(way1);
+	    var comparedWays = {};
 
-	                    return [
-	                        new validationIssueFix({
-	                            icon: 'iD-operation-extract',
-	                            title: _t('issues.fix.extract_point.title'),
-	                            onClick: extractOnClick
-	                        })
-	                    ];
-	                }
-	            });
-	        }
+	    for (i = 0; i < way1Nodes.length - 1; i++) {
+	      n1 = way1Nodes[i];
+	      n2 = way1Nodes[i + 1];
+	      extent = geoExtent([[Math.min(n1.loc[0], n2.loc[0]), Math.min(n1.loc[1], n2.loc[1])], [Math.max(n1.loc[0], n2.loc[0]), Math.max(n1.loc[1], n2.loc[1])]]); // Optimize by only checking overlapping segments, not every segment
+	      // of overlapping ways
 
-	        return null;
-	    }
+	      segmentInfos = tree.waySegments(extent, graph);
 
-	    function unclosedMultipolygonPartIssues(entity, graph) {
+	      for (j = 0; j < segmentInfos.length; j++) {
+	        segment2Info = segmentInfos[j]; // don't check for self-intersection in this validation
 
-	        if (entity.type !== 'relation' ||
-	            !entity.isMultipolygon() ||
-	            entity.isDegenerate() ||
-	            // cannot determine issues for incompletely-downloaded relations
-	            !entity.isComplete(graph)) { return null; }
+	        if (segment2Info.wayId === way1.id) continue; // skip if this way was already checked and only one issue is needed
 
-	        var sequences = osmJoinWays(entity.members, graph);
+	        if (checkedSingleCrossingWays[segment2Info.wayId]) continue; // mark this way as checked even if there are no crossings
 
-	        var issues = [];
+	        comparedWays[segment2Info.wayId] = true;
+	        way2 = graph.hasEntity(segment2Info.wayId);
+	        if (!way2) continue;
+	        taggedFeature2 = getFeatureWithFeatureTypeTagsForWay(way2, graph); // only check crossing highway, waterway, building, and railway
 
-	        for (var i in sequences) {
-	            var sequence = sequences[i];
+	        way2FeatureType = getFeatureType(taggedFeature2, graph);
 
-	            if (!sequence.nodes) { continue; }
+	        if (way2FeatureType === null || isLegitCrossing(taggedFeature1.tags, way1FeatureType, taggedFeature2.tags, way2FeatureType)) {
+	          continue;
+	        } // create only one issue for building crossings
 
-	            var firstNode = sequence.nodes[0];
-	            var lastNode = sequence.nodes[sequence.nodes.length - 1];
 
-	            // part is closed if the first and last nodes are the same
-	            if (firstNode === lastNode) { continue; }
+	        oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
+	        nAId = segment2Info.nodes[0];
+	        nBId = segment2Info.nodes[1];
 
-	            var issue = new validationIssue({
-	                type: type,
-	                subtype: 'unclosed_multipolygon_part',
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.unclosed_multipolygon_part.message', {
-	                        feature: utilDisplayLabel(entity, context.graph())
-	                    }) : '';
-	                },
-	                reference: showReference,
-	                loc: sequence.nodes[0].loc,
-	                entityIds: [entity.id],
-	                hash: sequence.map(function(way) {
-	                    return way.id;
-	                }).join()
-	            });
-	            issues.push(issue);
+	        if (nAId === n1.id || nAId === n2.id || nBId === n1.id || nBId === n2.id) {
+	          // n1 or n2 is a connection node; skip
+	          continue;
 	        }
 
-	        return issues;
+	        nA = graph.hasEntity(nAId);
+	        if (!nA) continue;
+	        nB = graph.hasEntity(nBId);
+	        if (!nB) continue;
+	        segment1 = [n1.loc, n2.loc];
+	        segment2 = [nA.loc, nB.loc];
+	        var point = geoLineIntersection(segment1, segment2);
+
+	        if (point) {
+	          edgeCrossInfos.push({
+	            wayInfos: [{
+	              way: way1,
+	              featureType: way1FeatureType,
+	              edge: [n1.id, n2.id]
+	            }, {
+	              way: way2,
+	              featureType: way2FeatureType,
+	              edge: [nA.id, nB.id]
+	            }],
+	            crossPoint: point
+	          });
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.unclosed_multipolygon_part.reference'));
+	          if (oneOnly) {
+	            checkedSingleCrossingWays[way2.id] = true;
+	            break;
+	          }
 	        }
+	      }
 	    }
 
-	    var validation = function checkMismatchedGeometry(entity, graph) {
-	        var issues = [
-	            vertexTaggedAsPointIssue(entity, graph),
-	            lineTaggedAsAreaIssue(entity)
-	        ];
-	        issues = issues.concat(unclosedMultipolygonPartIssues(entity, graph));
-	        return issues.filter(Boolean);
-	    };
-
-	    validation.type = type;
-
-	    return validation;
-	}
+	    return edgeCrossInfos;
+	  }
 
-	function validationMissingRole() {
-	    var type = 'missing_role';
+	  function waysToCheck(entity, graph) {
+	    var featureType = getFeatureType(entity, graph);
+	    if (!featureType) return [];
 
-	    var validation = function checkMissingRole(entity, graph) {
-	        var issues = [];
-	        if (entity.type === 'way') {
-	            graph.parentRelations(entity).forEach(function(relation) {
-	                if (!relation.isMultipolygon()) { return; }
+	    if (entity.type === 'way') {
+	      return [entity];
+	    } else if (entity.type === 'relation') {
+	      return entity.members.reduce(function (array, member) {
+	        if (member.type === 'way' && ( // only look at geometry ways
+	        !member.role || member.role === 'outer' || member.role === 'inner')) {
+	          var entity = graph.hasEntity(member.id); // don't add duplicates
 
-	                var member = relation.memberById(entity.id);
-	                if (member && isMissingRole(member)) {
-	                    issues.push(makeIssue(entity, relation, member));
-	                }
-	            });
-	        } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-	            entity.indexedMembers().forEach(function(member) {
-	                var way = graph.hasEntity(member.id);
-	                if (way && isMissingRole(member)) {
-	                    issues.push(makeIssue(way, entity, member));
-	                }
-	            });
+	          if (entity && array.indexOf(entity) === -1) {
+	            array.push(entity);
+	          }
 	        }
 
-	        return issues;
-	    };
-
-
-	    function isMissingRole(member) {
-	        return !member.role || !member.role.trim().length;
+	        return array;
+	      }, []);
 	    }
 
+	    return [];
+	  }
 
-	    function makeIssue(way, relation, member) {
-	        return new validationIssue({
-	            type: type,
-	            severity: 'warning',
-	            message: function(context) {
-	                var member = context.hasEntity(this.entityIds[1]),
-	                    relation = context.hasEntity(this.entityIds[0]);
-	                return (member && relation) ? _t('issues.missing_role.message', {
-	                    member: utilDisplayLabel(member, context.graph()),
-	                    relation: utilDisplayLabel(relation, context.graph())
-	                }) : '';
-	            },
-	            reference: showReference,
-	            entityIds: [relation.id, way.id],
-	            data: {
-	                member: member
-	            },
-	            hash: member.index.toString(),
-	            dynamicFixes: function() {
-	                return [
-	                    makeAddRoleFix('inner'),
-	                    makeAddRoleFix('outer'),
-	                    new validationIssueFix({
-	                        icon: 'iD-operation-delete',
-	                        title: _t('issues.fix.remove_from_relation.title'),
-	                        onClick: function(context) {
-	                            context.perform(
-	                                actionDeleteMember(this.issue.entityIds[0], this.issue.data.member.index),
-	                                _t('operations.delete_member.annotation')
-	                            );
-	                        }
-	                    })
-	                ];
-	            }
-	        });
-
+	  var validation = function checkCrossingWays(entity, graph) {
+	    var tree = context.history().tree();
+	    var ways = waysToCheck(entity, graph);
+	    var issues = []; // declare these here to reduce garbage collection
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.missing_role.multipolygon.reference'));
-	        }
-	    }
+	    var wayIndex, crossingIndex, crossings;
 
+	    for (wayIndex in ways) {
+	      crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
 
-	    function makeAddRoleFix(role) {
-	        return new validationIssueFix({
-	            title: _t('issues.fix.set_as_' + role + '.title'),
-	            onClick: function(context) {
-	                var oldMember = this.issue.data.member;
-	                var member = { id: this.issue.entityIds[1], type: oldMember.type, role: role };
-	                context.perform(
-	                    actionChangeMember(this.issue.entityIds[0], member, oldMember.index),
-	                    _t('operations.change_role.annotation')
-	                );
-	            }
-	        });
+	      for (crossingIndex in crossings) {
+	        issues.push(createIssue(crossings[crossingIndex], graph));
+	      }
 	    }
 
-	    validation.type = type;
-
-	    return validation;
-	}
+	    return issues;
+	  };
 
-	function validationMissingTag(context) {
-	    var type = 'missing_tag';
+	  function createIssue(crossing, graph) {
+	    // use the entities with the tags that define the feature type
+	    crossing.wayInfos.sort(function (way1Info, way2Info) {
+	      var type1 = way1Info.featureType;
+	      var type2 = way2Info.featureType;
 
-	    function hasDescriptiveTags(entity, graph) {
-	        var keys = Object.keys(entity.tags)
-	            .filter(function(k) {
-	                if (k === 'area' || k === 'name') {
-	                    return false;
-	                } else {
-	                    return osmIsInterestingTag(k);
-	                }
-	            });
+	      if (type1 === type2) {
+	        return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
+	      } else if (type1 === 'waterway') {
+	        return true;
+	      } else if (type2 === 'waterway') {
+	        return false;
+	      }
 
-	        if (entity.type === 'relation' &&
-	            keys.length === 1 &&
-	            entity.tags.type === 'multipolygon') {
-	            // this relation's only interesting tag just says its a multipolygon,
-	            // which is not descriptive enough
+	      return type1 < type2;
+	    });
+	    var entities = crossing.wayInfos.map(function (wayInfo) {
+	      return getFeatureWithFeatureTypeTagsForWay(wayInfo.way, graph);
+	    });
+	    var edges = [crossing.wayInfos[0].edge, crossing.wayInfos[1].edge];
+	    var featureTypes = [crossing.wayInfos[0].featureType, crossing.wayInfos[1].featureType];
+	    var connectionTags = tagsForConnectionNodeIfAllowed(entities[0], entities[1], graph);
+	    var featureType1 = crossing.wayInfos[0].featureType;
+	    var featureType2 = crossing.wayInfos[1].featureType;
+	    var isCrossingIndoors = taggedAsIndoor(entities[0].tags) && taggedAsIndoor(entities[1].tags);
+	    var isCrossingTunnels = allowsTunnel(featureType1) && hasTag(entities[0].tags, 'tunnel') && allowsTunnel(featureType2) && hasTag(entities[1].tags, 'tunnel');
+	    var isCrossingBridges = allowsBridge(featureType1) && hasTag(entities[0].tags, 'bridge') && allowsBridge(featureType2) && hasTag(entities[1].tags, 'bridge');
+	    var subtype = [featureType1, featureType2].sort().join('-');
+	    var crossingTypeID = subtype;
+
+	    if (isCrossingIndoors) {
+	      crossingTypeID = 'indoor-indoor';
+	    } else if (isCrossingTunnels) {
+	      crossingTypeID = 'tunnel-tunnel';
+	    } else if (isCrossingBridges) {
+	      crossingTypeID = 'bridge-bridge';
+	    }
+
+	    if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
+	      crossingTypeID += '_connectable';
+	    } // Differentiate based on the loc rounded to 4 digits, since two ways can cross multiple times.
+
+
+	    var uniqueID = crossing.crossPoint[0].toFixed(4) + ',' + crossing.crossPoint[1].toFixed(4);
+	    return new validationIssue({
+	      type: type,
+	      subtype: subtype,
+	      severity: 'warning',
+	      message: function message(context) {
+	        var graph = context.graph();
+	        var entity1 = graph.hasEntity(this.entityIds[0]),
+	            entity2 = graph.hasEntity(this.entityIds[1]);
+	        return entity1 && entity2 ? _t.html('issues.crossing_ways.message', {
+	          feature: utilDisplayLabel(entity1, graph),
+	          feature2: utilDisplayLabel(entity2, graph)
+	        }) : '';
+	      },
+	      reference: showReference,
+	      entityIds: entities.map(function (entity) {
+	        return entity.id;
+	      }),
+	      data: {
+	        edges: edges,
+	        featureTypes: featureTypes,
+	        connectionTags: connectionTags
+	      },
+	      hash: uniqueID,
+	      loc: crossing.crossPoint,
+	      dynamicFixes: function dynamicFixes(context) {
+	        var mode = context.mode();
+	        if (!mode || mode.id !== 'select' || mode.selectedIDs().length !== 1) return [];
+	        var selectedIndex = this.entityIds[0] === mode.selectedIDs()[0] ? 0 : 1;
+	        var selectedFeatureType = this.data.featureTypes[selectedIndex];
+	        var otherFeatureType = this.data.featureTypes[selectedIndex === 0 ? 1 : 0];
+	        var fixes = [];
 
-	            // It's okay for a simple multipolygon to have no descriptive tags
-	            // if its outer way has them (old model, see `outdated_tags.js`)
-	            return osmOldMultipolygonOuterMemberOfRelation(entity, graph);
+	        if (connectionTags) {
+	          fixes.push(makeConnectWaysFix(this.data.connectionTags));
 	        }
 
-	        return keys.length > 0;
-	    }
-
-	    function isUnknownRoad(entity) {
-	        return entity.type === 'way' && entity.tags.highway === 'road';
-	    }
+	        if (isCrossingIndoors) {
+	          fixes.push(new validationIssueFix({
+	            icon: 'iD-icon-layers',
+	            title: _t.html('issues.fix.use_different_levels.title')
+	          }));
+	        } else if (isCrossingTunnels || isCrossingBridges || featureType1 === 'building' || featureType2 === 'building') {
+	          fixes.push(makeChangeLayerFix('higher'));
+	          fixes.push(makeChangeLayerFix('lower')); // can only add bridge/tunnel if both features are lines
+	        } else if (context.graph().geometry(this.entityIds[0]) === 'line' && context.graph().geometry(this.entityIds[1]) === 'line') {
+	          // don't recommend adding bridges to waterways since they're uncommon
+	          if (allowsBridge(selectedFeatureType) && selectedFeatureType !== 'waterway') {
+	            fixes.push(makeAddBridgeOrTunnelFix('add_a_bridge', 'temaki-bridge', 'bridge'));
+	          } // don't recommend adding tunnels under waterways since they're uncommon
 
-	    function isUntypedRelation(entity) {
-	        return entity.type === 'relation' && !entity.tags.type;
-	    }
 
-	    var validation = function checkMissingTag(entity, graph) {
+	          var skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';
 
-	        var subtype;
+	          if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
+	            fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
+	          }
+	        } // repositioning the features is always an option
 
-	        var osm = context.connection();
-	        var isUnloadedNode = entity.type === 'node' && osm && !osm.isDataLoaded(entity.loc);
 
-	        // we can't know if the node is a vertex if the tile is undownloaded
-	        if (!isUnloadedNode &&
-	            // allow untagged nodes that are part of ways
-	            entity.geometry(graph) !== 'vertex' &&
-	            // allow untagged entities that are part of relations
-	            !entity.hasParentRelations(graph)) {
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-operation-move',
+	          title: _t.html('issues.fix.reposition_features.title')
+	        }));
+	        return fixes;
+	      }
+	    });
 
-	            if (Object.keys(entity.tags).length === 0) {
-	                subtype = 'any';
-	            } else if (!hasDescriptiveTags(entity, graph)) {
-	                subtype = 'descriptive';
-	            } else if (isUntypedRelation(entity)) {
-	                subtype = 'relation_type';
-	            }
-	        }
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.crossing_ways.' + crossingTypeID + '.reference'));
+	    }
+	  }
 
-	        // flag an unknown road even if it's a member of a relation
-	        if (!subtype && isUnknownRoad(entity)) {
-	            subtype = 'highway_classification';
+	  function makeAddBridgeOrTunnelFix(fixTitleID, iconName, bridgeOrTunnel) {
+	    return new validationIssueFix({
+	      icon: iconName,
+	      title: _t.html('issues.fix.' + fixTitleID + '.title'),
+	      onClick: function onClick(context) {
+	        var mode = context.mode();
+	        if (!mode || mode.id !== 'select') return;
+	        var selectedIDs = mode.selectedIDs();
+	        if (selectedIDs.length !== 1) return;
+	        var selectedWayID = selectedIDs[0];
+	        if (!context.hasEntity(selectedWayID)) return;
+	        var resultWayIDs = [selectedWayID];
+	        var edge, crossedEdge, crossedWayID;
+
+	        if (this.issue.entityIds[0] === selectedWayID) {
+	          edge = this.issue.data.edges[0];
+	          crossedEdge = this.issue.data.edges[1];
+	          crossedWayID = this.issue.entityIds[1];
+	        } else {
+	          edge = this.issue.data.edges[1];
+	          crossedEdge = this.issue.data.edges[0];
+	          crossedWayID = this.issue.entityIds[0];
 	        }
 
-	        if (!subtype) { return []; }
+	        var crossingLoc = this.issue.loc;
+	        var projection = context.projection;
 
-	        var messageID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag.' + subtype;
-	        var referenceID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag';
+	        var action = function actionAddStructure(graph) {
+	          var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
+	          var crossedWay = graph.hasEntity(crossedWayID); // use the explicit width of the crossed feature as the structure length, if available
 
-	        // can always delete if the user created it in the first place..
-	        var canDelete = (entity.version === undefined || entity.v !== undefined);
-	        var severity = (canDelete && subtype !== 'highway_classification') ? 'error' : 'warning';
+	          var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
 
-	        return [new validationIssue({
-	            type: type,
-	            subtype: subtype,
-	            severity: severity,
-	            message: function(context) {
-	                var entity = context.hasEntity(this.entityIds[0]);
-	                return entity ? _t('issues.' + messageID + '.message', {
-	                    feature: utilDisplayLabel(entity, context.graph())
-	                }) : '';
-	            },
-	            reference: showReference,
-	            entityIds: [entity.id],
-	            dynamicFixes: function(context) {
+	          if (!structLengthMeters) {
+	            // if no explicit width is set, approximate the width based on the tags
+	            structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
+	          }
 
-	                var fixes = [];
+	          if (structLengthMeters) {
+	            if (getFeatureType(crossedWay, graph) === 'railway') {
+	              // bridges over railways are generally much longer than the rail bed itself, compensate
+	              structLengthMeters *= 2;
+	            }
+	          } else {
+	            // should ideally never land here since all rail/water/road tags should have an implied width
+	            structLengthMeters = 8;
+	          }
 
-	                var selectFixType = subtype === 'highway_classification' ? 'select_road_type' : 'select_preset';
+	          var a1 = geoAngle(edgeNodes[0], edgeNodes[1], projection) + Math.PI;
+	          var a2 = geoAngle(graph.entity(crossedEdge[0]), graph.entity(crossedEdge[1]), projection) + Math.PI;
+	          var crossingAngle = Math.max(a1, a2) - Math.min(a1, a2);
+	          if (crossingAngle > Math.PI) crossingAngle -= Math.PI; // lengthen the structure to account for the angle of the crossing
 
-	                fixes.push(new validationIssueFix({
-	                    icon: 'iD-icon-search',
-	                    title: _t('issues.fix.' + selectFixType + '.title'),
-	                    onClick: function(context) {
-	                        context.ui().sidebar.showPresetList();
-	                    }
-	                }));
+	          structLengthMeters = structLengthMeters / 2 / Math.sin(crossingAngle) * 2; // add padding since the structure must extend past the edges of the crossed feature
 
-	                var deleteOnClick;
-
-	                var id = this.entityIds[0];
-	                var operation = operationDelete(context, [id]);
-	                var disabledReasonID = operation.disabled();
-	                if (!disabledReasonID) {
-	                    deleteOnClick = function(context) {
-	                        var id = this.issue.entityIds[0];
-	                        var operation = operationDelete(context, [id]);
-	                        if (!operation.disabled()) {
-	                            operation();
-	                        }
-	                    };
-	                }
+	          structLengthMeters += 4; // clamp the length to a reasonable range
 
-	                fixes.push(
-	                    new validationIssueFix({
-	                        icon: 'iD-operation-delete',
-	                        title: _t('issues.fix.delete_feature.title'),
-	                        disabledReason: disabledReasonID ? _t('operations.delete.' + disabledReasonID + '.single') : undefined,
-	                        onClick: deleteOnClick
-	                    })
-	                );
+	          structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
 
-	                return fixes;
-	            }
-	        })];
+	          function geomToProj(geoPoint) {
+	            return [geoLonToMeters(geoPoint[0], geoPoint[1]), geoLatToMeters(geoPoint[1])];
+	          }
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.' + referenceID + '.reference'));
-	        }
-	    };
+	          function projToGeom(projPoint) {
+	            var lat = geoMetersToLat(projPoint[1]);
+	            return [geoMetersToLon(projPoint[0], lat), lat];
+	          }
 
-	    validation.type = type;
+	          var projEdgeNode1 = geomToProj(edgeNodes[0].loc);
+	          var projEdgeNode2 = geomToProj(edgeNodes[1].loc);
+	          var projectedAngle = geoVecAngle(projEdgeNode1, projEdgeNode2);
+	          var projectedCrossingLoc = geomToProj(crossingLoc);
+	          var linearToSphericalMetersRatio = geoVecLength(projEdgeNode1, projEdgeNode2) / geoSphericalDistance(edgeNodes[0].loc, edgeNodes[1].loc);
 
-	    return validation;
-	}
+	          function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
+	            var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
+	            return projToGeom([projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters, projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters]);
+	          }
 
-	// remove spaces, punctuation, diacritics
-	var simplify = function (str) {
-	  return diacritics.remove(
-	    str
-	      .replace(/&/g, 'and')
-	      .replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u2016\u2017\u2020-\u2027\u2030-\u2038\u203b-\u203e\u2041-\u2043\u2047-\u2051\u2053\u2055-\u205e\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00\u2e01\u2e06-\u2e08\u2e0b\u2e0e-\u2e16\u2e18\u2e19\u2e1b\u2e1e\u2e1f\u2e2a-\u2e2e\u2e30-\u2e39\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g,'')
-	      .toLowerCase()
-	  );
-	};
+	          var endpointLocGetter1 = function endpointLocGetter1(lengthMeters) {
+	            return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
+	          };
 
-	// toParts - split a name-suggestion-index key into parts
-	// {
-	//   kvnd:        "amenity/fast_food|Thaï Express~(North America)",
-	//   kvn:         "amenity/fast_food|Thaï Express",
-	//   kv:          "amenity/fast_food",
-	//   k:           "amenity",
-	//   v:           "fast_food",
-	//   n:           "Thaï Express",
-	//   d:           "(North America)",
-	//   nsimple:     "thaiexpress",
-	//   kvnnsimple:  "amenity/fast_food|thaiexpress"
-	// }
-	var to_parts = function (kvnd) {
-	  var parts = {};
-	  parts.kvnd = kvnd;
+	          var endpointLocGetter2 = function endpointLocGetter2(lengthMeters) {
+	            return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
+	          }; // avoid creating very short edges from splitting too close to another node
 
-	  var kvndparts = kvnd.split('~', 2);
-	  if (kvndparts.length > 1) { parts.d = kvndparts[1]; }
 
-	  parts.kvn = kvndparts[0];
-	  var kvnparts = parts.kvn.split('|', 2);
-	  if (kvnparts.length > 1) { parts.n = kvnparts[1]; }
+	          var minEdgeLengthMeters = 0.55; // decide where to bound the structure along the way, splitting as necessary
 
-	  parts.kv = kvnparts[0];
-	  var kvparts = parts.kv.split('/', 2);
-	  parts.k = kvparts[0];
-	  parts.v = kvparts[1];
+	          function determineEndpoint(edge, endNode, locGetter) {
+	            var newNode;
+	            var idealLengthMeters = structLengthMeters / 2; // distance between the crossing location and the end of the edge,
+	            // the maximum length of this side of the structure
 
-	  parts.nsimple = simplify(parts.n);
-	  parts.kvnsimple = parts.kv + '|' + parts.nsimple;
-	  return parts;
-	};
+	            var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);
 
-	var matchGroups = {adult_gaming_centre:["amenity/casino","amenity/gambling","leisure/adult_gaming_centre"],beauty:["shop/beauty","shop/hairdresser_supply"],bed:["shop/bed","shop/furniture"],beverages:["shop/alcohol","shop/beverages"],camping:["leisure/park","tourism/camp_site","tourism/caravan_site"],car_parts:["shop/car_parts","shop/car_repair","shop/tires","shop/tyres"],confectionery:["shop/candy","shop/chocolate","shop/confectionery"],convenience:["shop/beauty","shop/chemist","shop/convenience","shop/cosmetics","shop/newsagent"],coworking:["amenity/coworking_space","office/coworking","office/coworking_space"],electronics:["office/telecommunication","shop/computer","shop/electronics","shop/hifi","shop/mobile","shop/mobile_phone","shop/telecommunication"],fashion:["shop/accessories","shop/bag","shop/botique","shop/clothes","shop/department_store","shop/fashion","shop/fashion_accessories","shop/sports","shop/shoes"],financial:["amenity/bank","office/accountant","office/financial","office/financial_advisor","office/tax_advisor","shop/tax"],fitness:["leisure/fitness_centre","leisure/fitness_center","leisure/sports_centre","leisure/sports_center"],food:["amenity/cafe","amenity/fast_food","amenity/ice_cream","amenity/restaurant","shop/bakery","shop/ice_cream","shop/pastry","shop/tea","shop/coffee"],fuel:["amenity/fuel","shop/gas","shop/convenience;gas","shop/gas;convenience"],gift:["shop/gift","shop/card","shop/cards","shop/stationery"],hardware:["shop/carpet","shop/diy","shop/doityourself","shop/doors","shop/electrical","shop/flooring","shop/hardware","shop/power_tools","shop/tool_hire","shop/tools","shop/trade"],health_food:["shop/health","shop/health_food","shop/herbalist","shop/nutrition_supplements"],houseware:["shop/houseware","shop/interior_decoration"],lodging:["tourism/hotel","tourism/motel"],money_transfer:["amenity/money_transfer","shop/money_transfer"],outdoor:["shop/outdoor","shop/sports"],rental:["amenity/bicycle_rental","amenity/boat_rental","amenity/car_rental","amenity/truck_rental","amenity/vehicle_rental","shop/rental"],school:["amenity/childcare","amenity/college","amenity/kindergarten","amenity/language_school","amenity/prep_school","amenity/school","amenity/university"],supermarket:["shop/food","shop/frozen_food","shop/greengrocer","shop/grocery","shop/supermarket","shop/wholesale"],variety_store:["shop/variety_store","shop/supermarket","shop/discount","shop/convenience"],vending:["amenity/vending_machine","shop/vending_machine"],wholesale:["shop/wholesale","shop/supermarket","shop/department_store"]};
-	var match_groups = {
-	matchGroups: matchGroups
-	};
+	            if (crossingToEdgeEndDistance - idealLengthMeters > minEdgeLengthMeters) {
+	              // the edge is long enough to insert a new node
+	              // the loc that would result in the full expected length
+	              var idealNodeLoc = locGetter(idealLengthMeters);
+	              newNode = osmNode();
+	              graph = actionAddMidpoint({
+	                loc: idealNodeLoc,
+	                edge: edge
+	              }, newNode)(graph);
+	            } else {
+	              var edgeCount = 0;
+	              endNode.parentIntersectionWays(graph).forEach(function (way) {
+	                way.nodes.forEach(function (nodeID) {
+	                  if (nodeID === endNode.id) {
+	                    if (endNode.id === way.first() && endNode.id !== way.last() || endNode.id === way.last() && endNode.id !== way.first()) {
+	                      edgeCount += 1;
+	                    } else {
+	                      edgeCount += 2;
+	                    }
+	                  }
+	                });
+	              });
 
-	var match_groups$1 = /*#__PURE__*/Object.freeze({
-		__proto__: null,
-		matchGroups: matchGroups,
-		'default': match_groups
-	});
+	              if (edgeCount >= 3) {
+	                // the end node is a junction, try to leave a segment
+	                // between it and the structure - #7202
+	                var insetLength = crossingToEdgeEndDistance - minEdgeLengthMeters;
+
+	                if (insetLength > minEdgeLengthMeters) {
+	                  var insetNodeLoc = locGetter(insetLength);
+	                  newNode = osmNode();
+	                  graph = actionAddMidpoint({
+	                    loc: insetNodeLoc,
+	                    edge: edge
+	                  }, newNode)(graph);
+	                }
+	              }
+	            } // if the edge is too short to subdivide as desired, then
+	            // just bound the structure at the existing end node
 
-	var require$$0 = getCjsExportFromNamespace(match_groups$1);
 
-	var matchGroups$1 = require$$0.matchGroups;
+	            if (!newNode) newNode = endNode;
+	            var splitAction = actionSplit([newNode.id]).limitWays(resultWayIDs); // only split selected or created ways
+	            // do the split
 
+	            graph = splitAction(graph);
 
-	var matcher$1 = function () {
-	  var _warnings = [];  // array of match conflict pairs
-	  var _ambiguous = {};
-	  var _matchIndex = {};
-	  var matcher = {};
+	            if (splitAction.getCreatedWayIDs().length) {
+	              resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
+	            }
 
+	            return newNode;
+	          }
 
-	  // Create an index of all the keys/simplenames for fast matching
-	  matcher.buildMatchIndex = function (brands) {
-	    // two passes - once for primary names, once for secondary/alternate names
-	    Object.keys(brands).forEach(function (kvnd) { return insertNames(kvnd, 'primary'); });
-	    Object.keys(brands).forEach(function (kvnd) { return insertNames(kvnd, 'secondary'); });
+	          var structEndNode1 = determineEndpoint(edge, edgeNodes[1], endpointLocGetter1);
+	          var structEndNode2 = determineEndpoint([edgeNodes[0].id, structEndNode1.id], edgeNodes[0], endpointLocGetter2);
+	          var structureWay = resultWayIDs.map(function (id) {
+	            return graph.entity(id);
+	          }).find(function (way) {
+	            return way.nodes.indexOf(structEndNode1.id) !== -1 && way.nodes.indexOf(structEndNode2.id) !== -1;
+	          });
+	          var tags = Object.assign({}, structureWay.tags); // copy tags
 
+	          if (bridgeOrTunnel === 'bridge') {
+	            tags.bridge = 'yes';
+	            tags.layer = '1';
+	          } else {
+	            var tunnelValue = 'yes';
 
-	    function insertNames(kvnd, which) {
-	      var obj = brands[kvnd];
-	      var parts = to_parts(kvnd);
+	            if (getFeatureType(structureWay, graph) === 'waterway') {
+	              // use `tunnel=culvert` for waterways by default
+	              tunnelValue = 'culvert';
+	            }
 
-	      // Exit early for ambiguous names in the second pass.
-	      // They were collected in the first pass and we don't gather alt names for them.
-	      if (which === 'secondary' && parts.d) { return; }
+	            tags.tunnel = tunnelValue;
+	            tags.layer = '-1';
+	          } // apply the structure tags to the way
 
 
-	      if (obj.countryCodes) {
-	        parts.countryCodes = obj.countryCodes.slice();  // copy
-	      }
+	          graph = actionChangeTags(structureWay.id, tags)(graph);
+	          return graph;
+	        };
 
-	      var nomatches = (obj.nomatch || []);
-	      if (nomatches.some(function (s) { return s === kvnd; })) {
-	        console.log(("WARNING match/nomatch conflict for " + kvnd));
-	        return;
+	        context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
+	        context.enter(modeSelect(context, resultWayIDs));
 	      }
+	    });
+	  }
 
-	      var match_kv = [parts.kv]
-	        .concat(obj.matchTags || [])
-	        .concat([((parts.k) + "/yes"), "building/yes"])   // #3454 - match some generic tags
-	        .map(function (s) { return s.toLowerCase(); });
+	  function makeConnectWaysFix(connectionTags) {
+	    var fixTitleID = 'connect_features';
 
-	      var match_nsimple = [];
-	      if (which === 'primary') {
-	        match_nsimple = [parts.n]
-	          .concat(obj.matchNames || [])
-	          .concat(obj.tags.official_name || [])   // #2732 - match alternate names
-	          .map(simplify);
+	    if (connectionTags.ford) {
+	      fixTitleID = 'connect_using_ford';
+	    }
 
-	      } else if (which === 'secondary') {
-	        match_nsimple = []
-	          .concat(obj.tags.alt_name || [])        // #2732 - match alternate names
-	          .concat(obj.tags.short_name || [])      // #2732 - match alternate names
-	          .map(simplify);
-	      }
+	    return new validationIssueFix({
+	      icon: 'iD-icon-crossing',
+	      title: _t.html('issues.fix.' + fixTitleID + '.title'),
+	      onClick: function onClick(context) {
+	        var loc = this.issue.loc;
+	        var connectionTags = this.issue.data.connectionTags;
+	        var edges = this.issue.data.edges;
+	        context.perform(function actionConnectCrossingWays(graph) {
+	          // create the new node for the points
+	          var node = osmNode({
+	            loc: loc,
+	            tags: connectionTags
+	          });
+	          graph = graph.replace(node);
+	          var nodesToMerge = [node.id];
+	          var mergeThresholdInMeters = 0.75;
+	          edges.forEach(function (edge) {
+	            var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
+	            var nearby = geoSphericalClosestNode(edgeNodes, loc); // if there is already a suitable node nearby, use that
+	            // use the node if node has no interesting tags or if it is a crossing node #8326
+
+	            if ((!nearby.node.hasInterestingTags() || nearby.node.isCrossing()) && nearby.distance < mergeThresholdInMeters) {
+	              nodesToMerge.push(nearby.node.id); // else add the new node to the way
+	            } else {
+	              graph = actionAddMidpoint({
+	                loc: loc,
+	                edge: edge
+	              }, node)(graph);
+	            }
+	          });
 
-	      if (!match_nsimple.length) { return; }  // nothing to do
+	          if (nodesToMerge.length > 1) {
+	            // if we're using nearby nodes, merge them with the new node
+	            graph = actionMergeNodes(nodesToMerge, loc)(graph);
+	          }
 
-	      match_kv.forEach(function (kv) {
-	        match_nsimple.forEach(function (nsimple) {
-	          if (parts.d) {
-	            // Known ambiguous names with disambiguation string ~(USA) / ~(Canada)
-	            // FIXME: Name collisions will overwrite the initial entry (ok for now)
-	            if (!_ambiguous[kv]) { _ambiguous[kv] = {}; }
-	            _ambiguous[kv][nsimple] = parts;
+	          return graph;
+	        }, _t('issues.fix.connect_crossing_features.annotation'));
+	      }
+	    });
+	  }
 
+	  function makeChangeLayerFix(higherOrLower) {
+	    return new validationIssueFix({
+	      icon: 'iD-icon-' + (higherOrLower === 'higher' ? 'up' : 'down'),
+	      title: _t.html('issues.fix.tag_this_as_' + higherOrLower + '.title'),
+	      onClick: function onClick(context) {
+	        var mode = context.mode();
+	        if (!mode || mode.id !== 'select') return;
+	        var selectedIDs = mode.selectedIDs();
+	        if (selectedIDs.length !== 1) return;
+	        var selectedID = selectedIDs[0];
+	        if (!this.issue.entityIds.some(function (entityId) {
+	          return entityId === selectedID;
+	        })) return;
+	        var entity = context.hasEntity(selectedID);
+	        if (!entity) return;
+	        var tags = Object.assign({}, entity.tags); // shallow copy
+
+	        var layer = tags.layer && Number(tags.layer);
+
+	        if (layer && !isNaN(layer)) {
+	          if (higherOrLower === 'higher') {
+	            layer += 1;
 	          } else {
-	            // Names we mostly expect to be unique..
-	            if (!_matchIndex[kv]) { _matchIndex[kv] = {}; }
-
-	            var m = _matchIndex[kv][nsimple];
-	            if (m) {  // There already is a match for this name, skip it
-	              // Warn if we detect collisions in a primary name.
-	              // Skip warning if a secondary name or a generic `*=yes` tag - #2972 / #3454
-	              if (which === 'primary' && !/\/yes$/.test(kv)) {
-	                _warnings.push([m.kvnd, (kvnd + " (" + kv + "/" + nsimple + ")")]);
-	              }
-	            } else {
-	              _matchIndex[kv][nsimple] = parts;   // insert
-	            }
+	            layer -= 1;
 	          }
-	        });
-	      });
+	        } else {
+	          if (higherOrLower === 'higher') {
+	            layer = 1;
+	          } else {
+	            layer = -1;
+	          }
+	        }
 
-	    }
-	  };
+	        tags.layer = layer.toString();
+	        context.perform(actionChangeTags(entity.id, tags), _t('operations.change_tags.annotation'));
+	      }
+	    });
+	  }
 
+	  validation.type = type;
+	  return validation;
+	}
 
-	  // pass a `key`, `value`, `name` and return the best match,
-	  // `countryCode` optional (if supplied, must match that too)
-	  matcher.matchKVN = function (key, value, name, countryCode) {
-	    return matcher.matchParts(to_parts((key + "/" + value + "|" + name)), countryCode);
-	  };
+	function behaviorDrawWay(context, wayID, mode, startGraph) {
+	  var keybinding = utilKeybinding('drawWay');
+	  var dispatch = dispatch$8('rejectedSelfIntersection');
+	  var behavior = behaviorDraw(context); // Must be set by `drawWay.nodeIndex` before each install of this behavior.
 
+	  var _nodeIndex;
 
-	  // pass a parts object and return the best match,
-	  // `countryCode` optional (if supplied, must match that too)
-	  matcher.matchParts = function (parts, countryCode) {
-	    var match = null;
-	    var inGroup = false;
+	  var _origWay;
 
-	    // fixme: we currently return a single match for ambiguous
-	    match = _ambiguous[parts.kv] && _ambiguous[parts.kv][parts.nsimple];
-	    if (match && matchesCountryCode(match)) { return match; }
+	  var _wayGeometry;
 
-	    // try to return an exact match
-	    match = _matchIndex[parts.kv] && _matchIndex[parts.kv][parts.nsimple];
-	    if (match && matchesCountryCode(match)) { return match; }
+	  var _headNodeID;
 
-	    // look in match groups
-	    for (var mg in matchGroups$1) {
-	      var matchGroup = matchGroups$1[mg];
-	      match = null;
-	      inGroup = false;
+	  var _annotation;
 
-	      for (var i = 0; i < matchGroup.length; i++) {
-	        var otherkv = matchGroup[i].toLowerCase();
-	        if (!inGroup) {
-	          inGroup = otherkv === parts.kv;
-	        }
-	        if (!match) {
-	          // fixme: we currently return a single match for ambiguous
-	          match = _ambiguous[otherkv] && _ambiguous[otherkv][parts.nsimple];
-	        }
-	        if (!match) {
-	          match = _matchIndex[otherkv] && _matchIndex[otherkv][parts.nsimple];
-	        }
+	  var _pointerHasMoved = false; // The osmNode to be placed.
+	  // This is temporary and just follows the mouse cursor until an "add" event occurs.
 
-	        if (match && !matchesCountryCode(match)) {
-	          match = null;
-	        }
+	  var _drawNode;
 
-	        if (inGroup && match) {
-	          return match;
-	        }
-	      }
-	    }
+	  var _didResolveTempEdit = false;
 
-	    return null;
+	  function createDrawNode(loc) {
+	    // don't make the draw node until we actually need it
+	    _drawNode = osmNode({
+	      loc: loc
+	    });
+	    context.pauseChangeDispatch();
+	    context.replace(function actionAddDrawNode(graph) {
+	      // add the draw node to the graph and insert it into the way
+	      var way = graph.entity(wayID);
+	      return graph.replace(_drawNode).replace(way.addNode(_drawNode.id, _nodeIndex));
+	    }, _annotation);
+	    context.resumeChangeDispatch();
+	    setActiveElements();
+	  }
+
+	  function removeDrawNode() {
+	    context.pauseChangeDispatch();
+	    context.replace(function actionDeleteDrawNode(graph) {
+	      var way = graph.entity(wayID);
+	      return graph.replace(way.removeNode(_drawNode.id)).remove(_drawNode);
+	    }, _annotation);
+	    _drawNode = undefined;
+	    context.resumeChangeDispatch();
+	  }
+
+	  function keydown(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope')) {
+	        context.surface().classed('nope-suppressed', true);
+	      }
 
-	    function matchesCountryCode(match) {
-	      if (!countryCode) { return true; }
-	      if (!match.countryCodes) { return true; }
-	      return match.countryCodes.indexOf(countryCode) !== -1;
+	      context.surface().classed('nope', false).classed('nope-disabled', true);
 	    }
-	  };
+	  }
 
+	  function keyup(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope-suppressed')) {
+	        context.surface().classed('nope', true);
+	      }
 
-	  matcher.getWarnings = function () { return _warnings; };
+	      context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+	    }
+	  }
 
-	  return matcher;
-	};
+	  function allowsVertex(d) {
+	    return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+	  } // related code
+	  // - `mode/drag_node.js`     `doMove()`
+	  // - `behavior/draw.js`      `click()`
+	  // - `behavior/draw_way.js`  `move()`
 
-	var quickselect$1 = createCommonjsModule(function (module, exports) {
-	(function (global, factory) {
-		 module.exports = factory() ;
-	}(commonjsGlobal, (function () {
-	function quickselect(arr, k, left, right, compare) {
-	    quickselectStep(arr, k, left || 0, right || (arr.length - 1), compare || defaultCompare);
-	}
 
-	function quickselectStep(arr, k, left, right, compare) {
+	  function move(d3_event, datum) {
+	    var loc = context.map().mouseCoordinates();
+	    if (!_drawNode) createDrawNode(loc);
+	    context.surface().classed('nope-disabled', d3_event.altKey);
+	    var targetLoc = datum && datum.properties && datum.properties.entity && allowsVertex(datum.properties.entity) && datum.properties.entity.loc;
+	    var targetNodes = datum && datum.properties && datum.properties.nodes;
 
-	    while (right > left) {
-	        if (right - left > 600) {
-	            var n = right - left + 1;
-	            var m = k - left + 1;
-	            var z = Math.log(n);
-	            var s = 0.5 * Math.exp(2 * z / 3);
-	            var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
-	            var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
-	            var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
-	            quickselectStep(arr, k, newLeft, newRight, compare);
-	        }
+	    if (targetLoc) {
+	      // snap to node/vertex - a point target with `.loc`
+	      loc = targetLoc;
+	    } else if (targetNodes) {
+	      // snap to way - a line target with `.nodes`
+	      var choice = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, _drawNode.id);
 
-	        var t = arr[k];
-	        var i = left;
-	        var j = right;
+	      if (choice) {
+	        loc = choice.loc;
+	      }
+	    }
 
-	        swap(arr, left, k);
-	        if (compare(arr[right], t) > 0) { swap(arr, left, right); }
+	    context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
+	    _drawNode = context.entity(_drawNode.id);
+	    checkGeometry(true
+	    /* includeDrawNode */
+	    );
+	  } // Check whether this edit causes the geometry to break.
+	  // If so, class the surface with a nope cursor.
+	  // `includeDrawNode` - Only check the relevant line segments if finishing drawing
 
-	        while (i < j) {
-	            swap(arr, i, j);
-	            i++;
-	            j--;
-	            while (compare(arr[i], t) < 0) { i++; }
-	            while (compare(arr[j], t) > 0) { j--; }
-	        }
 
-	        if (compare(arr[left], t) === 0) { swap(arr, left, j); }
-	        else {
-	            j++;
-	            swap(arr, j, right);
-	        }
+	  function checkGeometry(includeDrawNode) {
+	    var nopeDisabled = context.surface().classed('nope-disabled');
+	    var isInvalid = isInvalidGeometry(includeDrawNode);
 
-	        if (j <= k) { left = j + 1; }
-	        if (k <= j) { right = j - 1; }
+	    if (nopeDisabled) {
+	      context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+	    } else {
+	      context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
 	    }
-	}
-
-	function swap(arr, i, j) {
-	    var tmp = arr[i];
-	    arr[i] = arr[j];
-	    arr[j] = tmp;
-	}
+	  }
 
-	function defaultCompare(a, b) {
-	    return a < b ? -1 : a > b ? 1 : 0;
-	}
+	  function isInvalidGeometry(includeDrawNode) {
+	    var testNode = _drawNode; // we only need to test the single way we're drawing
 
-	return quickselect;
+	    var parentWay = context.graph().entity(wayID);
+	    var nodes = context.graph().childNodes(parentWay).slice(); // shallow copy
 
-	})));
-	});
+	    if (includeDrawNode) {
+	      if (parentWay.isClosed()) {
+	        // don't test the last segment for closed ways - #4655
+	        // (still test the first segment)
+	        nodes.pop();
+	      }
+	    } else {
+	      // discount the draw node
+	      if (parentWay.isClosed()) {
+	        if (nodes.length < 3) return false;
+	        if (_drawNode) nodes.splice(-2, 1);
+	        testNode = nodes[nodes.length - 2];
+	      } else {
+	        // there's nothing we need to test if we ignore the draw node on open ways
+	        return false;
+	      }
+	    }
 
-	var rbush_1 = rbush;
-	var _default$2 = rbush;
+	    return testNode && geoHasSelfIntersections(nodes, testNode.id);
+	  }
 
+	  function undone() {
+	    // undoing removed the temp edit
+	    _didResolveTempEdit = true;
+	    context.pauseChangeDispatch();
+	    var nextMode;
 
+	    if (context.graph() === startGraph) {
+	      // We've undone back to the initial state before we started drawing.
+	      // Just exit the draw mode without undoing whatever we did before
+	      // we entered the draw mode.
+	      nextMode = modeSelect(context, [wayID]);
+	    } else {
+	      // The `undo` only removed the temporary edit, so here we have to
+	      // manually undo to actually remove the last node we added. We can't
+	      // use the `undo` function since the initial "add" graph doesn't have
+	      // an annotation and so cannot be undone to.
+	      context.pop(1); // continue drawing
 
-	function rbush(maxEntries, format) {
-	    if (!(this instanceof rbush)) { return new rbush(maxEntries, format); }
+	      nextMode = mode;
+	    } // clear the redo stack by adding and removing a blank edit
 
-	    // max entries in a node is 9 by default; min node fill is 40% for best performance
-	    this._maxEntries = Math.max(4, maxEntries || 9);
-	    this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
 
-	    if (format) {
-	        this._initFormat(format);
-	    }
+	    context.perform(actionNoop());
+	    context.pop(1);
+	    context.resumeChangeDispatch();
+	    context.enter(nextMode);
+	  }
 
-	    this.clear();
-	}
+	  function setActiveElements() {
+	    if (!_drawNode) return;
+	    context.surface().selectAll('.' + _drawNode.id).classed('active', true);
+	  }
 
-	rbush.prototype = {
+	  function resetToStartGraph() {
+	    while (context.graph() !== startGraph) {
+	      context.pop();
+	    }
+	  }
 
-	    all: function () {
-	        return this._all(this.data, []);
-	    },
+	  var drawWay = function drawWay(surface) {
+	    _drawNode = undefined;
+	    _didResolveTempEdit = false;
+	    _origWay = context.entity(wayID);
 
-	    search: function (bbox) {
+	    if (typeof _nodeIndex === 'number') {
+	      _headNodeID = _origWay.nodes[_nodeIndex];
+	    } else if (_origWay.isClosed()) {
+	      _headNodeID = _origWay.nodes[_origWay.nodes.length - 2];
+	    } else {
+	      _headNodeID = _origWay.nodes[_origWay.nodes.length - 1];
+	    }
+
+	    _wayGeometry = _origWay.geometry(context.graph());
+	    _annotation = _t((_origWay.nodes.length === (_origWay.isClosed() ? 2 : 1) ? 'operations.start.annotation.' : 'operations.continue.annotation.') + _wayGeometry);
+	    _pointerHasMoved = false; // Push an annotated state for undo to return back to.
+	    // We must make sure to replace or remove it later.
+
+	    context.pauseChangeDispatch();
+	    context.perform(actionNoop(), _annotation);
+	    context.resumeChangeDispatch();
+	    behavior.hover().initialNodeID(_headNodeID);
+	    behavior.on('move', function () {
+	      _pointerHasMoved = true;
+	      move.apply(this, arguments);
+	    }).on('down', function () {
+	      move.apply(this, arguments);
+	    }).on('downcancel', function () {
+	      if (_drawNode) removeDrawNode();
+	    }).on('click', drawWay.add).on('clickWay', drawWay.addWay).on('clickNode', drawWay.addNode).on('undo', context.undo).on('cancel', drawWay.cancel).on('finish', drawWay.finish);
+	    select(window).on('keydown.drawWay', keydown).on('keyup.drawWay', keyup);
+	    context.map().dblclickZoomEnable(false).on('drawn.draw', setActiveElements);
+	    setActiveElements();
+	    surface.call(behavior);
+	    context.history().on('undone.draw', undone);
+	  };
+
+	  drawWay.off = function (surface) {
+	    if (!_didResolveTempEdit) {
+	      // Drawing was interrupted unexpectedly.
+	      // This can happen if the user changes modes,
+	      // clicks geolocate button, a hashchange event occurs, etc.
+	      context.pauseChangeDispatch();
+	      resetToStartGraph();
+	      context.resumeChangeDispatch();
+	    }
+
+	    _drawNode = undefined;
+	    _nodeIndex = undefined;
+	    context.map().on('drawn.draw', null);
+	    surface.call(behavior.off).selectAll('.active').classed('active', false);
+	    surface.classed('nope', false).classed('nope-suppressed', false).classed('nope-disabled', false);
+	    select(window).on('keydown.drawWay', null).on('keyup.drawWay', null);
+	    context.history().on('undone.draw', null);
+	  };
+
+	  function attemptAdd(d, loc, doAdd) {
+	    if (_drawNode) {
+	      // move the node to the final loc in case move wasn't called
+	      // consistently (e.g. on touch devices)
+	      context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
+	      _drawNode = context.entity(_drawNode.id);
+	    } else {
+	      createDrawNode(loc);
+	    }
 
-	        var node = this.data,
-	            result = [],
-	            toBBox = this.toBBox;
+	    checkGeometry(true
+	    /* includeDrawNode */
+	    );
 
-	        if (!intersects$1(bbox, node)) { return result; }
+	    if (d && d.properties && d.properties.nope || context.surface().classed('nope')) {
+	      if (!_pointerHasMoved) {
+	        // prevent the temporary draw node from appearing on touch devices
+	        removeDrawNode();
+	      }
 
-	        var nodesToSearch = [],
-	            i, len, child, childBBox;
+	      dispatch.call('rejectedSelfIntersection', this);
+	      return; // can't click here
+	    }
 
-	        while (node) {
-	            for (i = 0, len = node.children.length; i < len; i++) {
+	    context.pauseChangeDispatch();
+	    doAdd(); // we just replaced the temporary edit with the real one
 
-	                child = node.children[i];
-	                childBBox = node.leaf ? toBBox(child) : child;
+	    _didResolveTempEdit = true;
+	    context.resumeChangeDispatch();
+	    context.enter(mode);
+	  } // Accept the current position of the drawing node
 
-	                if (intersects$1(bbox, childBBox)) {
-	                    if (node.leaf) { result.push(child); }
-	                    else if (contains$2(bbox, childBBox)) { this._all(child, result); }
-	                    else { nodesToSearch.push(child); }
-	                }
-	            }
-	            node = nodesToSearch.pop();
-	        }
 
-	        return result;
-	    },
+	  drawWay.add = function (loc, d) {
+	    attemptAdd(d, loc, function () {// don't need to do anything extra
+	    });
+	  }; // Connect the way to an existing way
 
-	    collides: function (bbox) {
 
-	        var node = this.data,
-	            toBBox = this.toBBox;
+	  drawWay.addWay = function (loc, edge, d) {
+	    attemptAdd(d, loc, function () {
+	      context.replace(actionAddMidpoint({
+	        loc: loc,
+	        edge: edge
+	      }, _drawNode), _annotation);
+	    });
+	  }; // Connect the way to an existing node
 
-	        if (!intersects$1(bbox, node)) { return false; }
 
-	        var nodesToSearch = [],
-	            i, len, child, childBBox;
+	  drawWay.addNode = function (node, d) {
+	    // finish drawing if the mapper targets the prior node
+	    if (node.id === _headNodeID || // or the first node when drawing an area
+	    _origWay.isClosed() && node.id === _origWay.first()) {
+	      drawWay.finish();
+	      return;
+	    }
 
-	        while (node) {
-	            for (i = 0, len = node.children.length; i < len; i++) {
+	    attemptAdd(d, node.loc, function () {
+	      context.replace(function actionReplaceDrawNode(graph) {
+	        // remove the temporary draw node and insert the existing node
+	        // at the same index
+	        graph = graph.replace(graph.entity(wayID).removeNode(_drawNode.id)).remove(_drawNode);
+	        return graph.replace(graph.entity(wayID).addNode(node.id, _nodeIndex));
+	      }, _annotation);
+	    });
+	  };
+	  /**
+	   * @param {(typeof osmWay)[]} ways
+	   * @returns {"line" | "area" | "generic"}
+	   */
 
-	                child = node.children[i];
-	                childBBox = node.leaf ? toBBox(child) : child;
 
-	                if (intersects$1(bbox, childBBox)) {
-	                    if (node.leaf || contains$2(bbox, childBBox)) { return true; }
-	                    nodesToSearch.push(child);
-	                }
-	            }
-	            node = nodesToSearch.pop();
-	        }
+	  function getFeatureType(ways) {
+	    if (ways.every(function (way) {
+	      return way.isClosed();
+	    })) return 'area';
+	    if (ways.every(function (way) {
+	      return !way.isClosed();
+	    })) return 'line';
+	    return 'generic';
+	  }
+	  /** see PR #8671 */
 
-	        return false;
-	    },
 
-	    load: function (data) {
-	        if (!(data && data.length)) { return this; }
+	  function followMode() {
+	    if (_didResolveTempEdit) return;
 
-	        if (data.length < this._minEntries) {
-	            for (var i = 0, len = data.length; i < len; i++) {
-	                this.insert(data[i]);
-	            }
-	            return this;
-	        }
+	    try {
+	      // get the last 2 added nodes.
+	      // check if they are both part of only oneway (the same one)
+	      // check if the ways that they're part of are the same way
+	      // find index of the last two nodes, to determine the direction to travel around the existing way
+	      // add the next node to the way we are drawing
+	      // if we're drawing an area, the first node = last node.
+	      var isDrawingArea = _origWay.nodes[0] === _origWay.nodes.slice(-1)[0];
 
-	        // recursively build the tree with the given data from scratch using OMT algorithm
-	        var node = this._build(data.slice(), 0, data.length - 1, 0);
+	      var _origWay$nodes$slice = _origWay.nodes.slice(isDrawingArea ? -3 : -2),
+	          _origWay$nodes$slice2 = _slicedToArray(_origWay$nodes$slice, 2),
+	          secondLastNodeId = _origWay$nodes$slice2[0],
+	          lastNodeId = _origWay$nodes$slice2[1]; // Unlike startGraph, the full history graph may contain unsaved vertices to follow.
+	      // https://github.com/openstreetmap/iD/issues/8749
 
-	        if (!this.data.children.length) {
-	            // save as is if tree is empty
-	            this.data = node;
 
-	        } else if (this.data.height === node.height) {
-	            // split root if trees have the same height
-	            this._splitRoot(this.data, node);
+	      var historyGraph = context.history().graph();
 
-	        } else {
-	            if (this.data.height < node.height) {
-	                // swap trees if inserted one is bigger
-	                var tmpNode = this.data;
-	                this.data = node;
-	                node = tmpNode;
-	            }
+	      if (!lastNodeId || !secondLastNodeId || !historyGraph.hasEntity(lastNodeId) || !historyGraph.hasEntity(secondLastNodeId)) {
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t.html('operations.follow.error.needs_more_initial_nodes'))();
+	        return;
+	      } // If the way has looped over itself, follow some other way.
 
-	            // insert the small tree into the large tree at appropriate level
-	            this._insert(node, this.data.height - node.height - 1, true);
-	        }
 
-	        return this;
-	    },
+	      var lastNodesParents = historyGraph.parentWays(historyGraph.entity(lastNodeId)).filter(function (w) {
+	        return w.id !== wayID;
+	      });
+	      var secondLastNodesParents = historyGraph.parentWays(historyGraph.entity(secondLastNodeId)).filter(function (w) {
+	        return w.id !== wayID;
+	      });
+	      var featureType = getFeatureType(lastNodesParents);
 
-	    insert: function (item) {
-	        if (item) { this._insert(item, this.data.height - 1); }
-	        return this;
-	    },
+	      if (lastNodesParents.length !== 1 || secondLastNodesParents.length === 0) {
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t.html("operations.follow.error.intersection_of_multiple_ways.".concat(featureType)))();
+	        return;
+	      } // Check if the last node's parent is also the parent of the second last node.
+	      // The last node must only have one parent, but the second last node can have
+	      // multiple parents.
 
-	    clear: function () {
-	        this.data = createNode$1([]);
-	        return this;
-	    },
 
-	    remove: function (item, equalsFn) {
-	        if (!item) { return this; }
+	      if (!secondLastNodesParents.some(function (n) {
+	        return n.id === lastNodesParents[0].id;
+	      })) {
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t.html("operations.follow.error.intersection_of_different_ways.".concat(featureType)))();
+	        return;
+	      }
 
-	        var node = this.data,
-	            bbox = this.toBBox(item),
-	            path = [],
-	            indexes = [],
-	            i, parent, index, goingUp;
+	      var way = lastNodesParents[0];
+	      var indexOfLast = way.nodes.indexOf(lastNodeId);
+	      var indexOfSecondLast = way.nodes.indexOf(secondLastNodeId); // for a closed way, the first/last node is the same so it appears twice in the array,
+	      // but indexOf always finds the first occurrence. This is only an issue when following a way
+	      // in descending order
 
-	        // depth-first iterative tree traversal
-	        while (node || path.length) {
+	      var isDescendingPastZero = indexOfLast === way.nodes.length - 2 && indexOfSecondLast === 0;
+	      var nextNodeIndex = indexOfLast + (indexOfLast > indexOfSecondLast && !isDescendingPastZero ? 1 : -1); // if we're following a closed way and we pass the first/last node, the  next index will be -1
 
-	            if (!node) { // go up
-	                node = path.pop();
-	                parent = path[path.length - 1];
-	                i = indexes.pop();
-	                goingUp = true;
-	            }
+	      if (nextNodeIndex === -1) nextNodeIndex = indexOfSecondLast === 1 ? way.nodes.length - 2 : 1;
+	      var nextNode = historyGraph.entity(way.nodes[nextNodeIndex]);
+	      drawWay.addNode(nextNode, {
+	        geometry: {
+	          type: 'Point',
+	          coordinates: nextNode.loc
+	        },
+	        id: nextNode.id,
+	        properties: {
+	          target: true,
+	          entity: nextNode
+	        }
+	      });
+	    } catch (ex) {
+	      context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t.html('operations.follow.error.unknown'))();
+	    }
+	  }
 
-	            if (node.leaf) { // check current node
-	                index = findItem$1(item, node.children, equalsFn);
+	  keybinding.on(_t('operations.follow.key'), followMode);
+	  select(document).call(keybinding); // Finish the draw operation, removing the temporary edit.
+	  // If the way has enough nodes to be valid, it's selected.
+	  // Otherwise, delete everything and return to browse mode.
 
-	                if (index !== -1) {
-	                    // item found, remove the item and condense tree upwards
-	                    node.children.splice(index, 1);
-	                    path.push(node);
-	                    this._condense(path);
-	                    return this;
-	                }
-	            }
+	  drawWay.finish = function () {
+	    checkGeometry(false
+	    /* includeDrawNode */
+	    );
 
-	            if (!goingUp && !node.leaf && contains$2(node, bbox)) { // go down
-	                path.push(node);
-	                indexes.push(i);
-	                i = 0;
-	                parent = node;
-	                node = node.children[0];
+	    if (context.surface().classed('nope')) {
+	      dispatch.call('rejectedSelfIntersection', this);
+	      return; // can't click here
+	    }
 
-	            } else if (parent) { // go right
-	                i++;
-	                node = parent.children[i];
-	                goingUp = false;
+	    context.pauseChangeDispatch(); // remove the temporary edit
 
-	            } else { node = null; } // nothing found
-	        }
+	    context.pop(1);
+	    _didResolveTempEdit = true;
+	    context.resumeChangeDispatch();
+	    var way = context.hasEntity(wayID);
 
-	        return this;
-	    },
+	    if (!way || way.isDegenerate()) {
+	      drawWay.cancel();
+	      return;
+	    }
 
-	    toBBox: function (item) { return item; },
+	    window.setTimeout(function () {
+	      context.map().dblclickZoomEnable(true);
+	    }, 1000);
+	    var isNewFeature = !mode.isContinuing;
+	    context.enter(modeSelect(context, [wayID]).newFeature(isNewFeature));
+	  }; // Cancel the draw operation, delete everything, and return to browse mode.
 
-	    compareMinX: compareNodeMinX$1,
-	    compareMinY: compareNodeMinY$1,
 
-	    toJSON: function () { return this.data; },
+	  drawWay.cancel = function () {
+	    context.pauseChangeDispatch();
+	    resetToStartGraph();
+	    context.resumeChangeDispatch();
+	    window.setTimeout(function () {
+	      context.map().dblclickZoomEnable(true);
+	    }, 1000);
+	    context.surface().classed('nope', false).classed('nope-disabled', false).classed('nope-suppressed', false);
+	    context.enter(modeBrowse(context));
+	  };
 
-	    fromJSON: function (data) {
-	        this.data = data;
-	        return this;
-	    },
+	  drawWay.nodeIndex = function (val) {
+	    if (!arguments.length) return _nodeIndex;
+	    _nodeIndex = val;
+	    return drawWay;
+	  };
 
-	    _all: function (node, result) {
-	        var nodesToSearch = [];
-	        while (node) {
-	            if (node.leaf) { result.push.apply(result, node.children); }
-	            else { nodesToSearch.push.apply(nodesToSearch, node.children); }
+	  drawWay.activeID = function () {
+	    if (!arguments.length) return _drawNode && _drawNode.id; // no assign
 
-	            node = nodesToSearch.pop();
-	        }
-	        return result;
-	    },
+	    return drawWay;
+	  };
 
-	    _build: function (items, left, right, height) {
+	  return utilRebind(drawWay, dispatch, 'on');
+	}
 
-	        var N = right - left + 1,
-	            M = this._maxEntries,
-	            node;
+	function modeDrawLine(context, wayID, startGraph, button, affix, continuing) {
+	  var mode = {
+	    button: button,
+	    id: 'draw-line'
+	  };
+	  var behavior = behaviorDrawWay(context, wayID, mode, startGraph).on('rejectedSelfIntersection.modeDrawLine', function () {
+	    context.ui().flash.iconName('#iD-icon-no').label(_t.html('self_intersection.error.lines'))();
+	  });
+	  mode.wayID = wayID;
+	  mode.isContinuing = continuing;
 
-	        if (N <= M) {
-	            // reached leaf level; return leaf
-	            node = createNode$1(items.slice(left, right + 1));
-	            calcBBox$1(node, this.toBBox);
-	            return node;
-	        }
+	  mode.enter = function () {
+	    behavior.nodeIndex(affix === 'prefix' ? 0 : undefined);
+	    context.install(behavior);
+	  };
 
-	        if (!height) {
-	            // target height of the bulk-loaded tree
-	            height = Math.ceil(Math.log(N) / Math.log(M));
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	            // target number of root entries to maximize storage utilization
-	            M = Math.ceil(N / Math.pow(M, height - 1));
-	        }
+	  mode.selectedIDs = function () {
+	    return [wayID];
+	  };
 
-	        node = createNode$1([]);
-	        node.leaf = false;
-	        node.height = height;
+	  mode.activeID = function () {
+	    return behavior && behavior.activeID() || [];
+	  };
 
-	        // split the items into M mostly square tiles
+	  return mode;
+	}
 
-	        var N2 = Math.ceil(N / M),
-	            N1 = N2 * Math.ceil(Math.sqrt(M)),
-	            i, j, right2, right3;
+	function validationDisconnectedWay() {
+	  var type = 'disconnected_way';
 
-	        multiSelect$1(items, left, right, N1, this.compareMinX);
+	  function isTaggedAsHighway(entity) {
+	    return osmRoutableHighwayTagValues[entity.tags.highway];
+	  }
 
-	        for (i = left; i <= right; i += N1) {
+	  var validation = function checkDisconnectedWay(entity, graph) {
+	    var routingIslandWays = routingIslandForEntity(entity);
+	    if (!routingIslandWays) return [];
+	    return [new validationIssue({
+	      type: type,
+	      subtype: 'highway',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = this.entityIds.length && context.hasEntity(this.entityIds[0]);
+	        var label = entity && utilDisplayLabel(entity, context.graph());
+	        return _t.html('issues.disconnected_way.routable.message', {
+	          count: this.entityIds.length,
+	          highway: label
+	        });
+	      },
+	      reference: showReference,
+	      entityIds: Array.from(routingIslandWays).map(function (way) {
+	        return way.id;
+	      }),
+	      dynamicFixes: makeFixes
+	    })];
 
-	            right2 = Math.min(i + N1 - 1, right);
+	    function makeFixes(context) {
+	      var fixes = [];
+	      var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
 
-	            multiSelect$1(items, i, right2, N2, this.compareMinY);
+	      if (singleEntity) {
+	        if (singleEntity.type === 'way' && !singleEntity.isClosed()) {
+	          var textDirection = _mainLocalizer.textDirection();
+	          var startFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.first(), 'start');
+	          if (startFix) fixes.push(startFix);
+	          var endFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.last(), 'end');
+	          if (endFix) fixes.push(endFix);
+	        }
 
-	            for (j = i; j <= right2; j += N2) {
+	        if (!fixes.length) {
+	          fixes.push(new validationIssueFix({
+	            title: _t.html('issues.fix.connect_feature.title')
+	          }));
+	        }
 
-	                right3 = Math.min(j + N2 - 1, right2);
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.delete_feature.title'),
+	          entityIds: [singleEntity.id],
+	          onClick: function onClick(context) {
+	            var id = this.issue.entityIds[0];
+	            var operation = operationDelete(context, [id]);
 
-	                // pack each entry recursively
-	                node.children.push(this._build(items, j, right3, height - 1));
+	            if (!operation.disabled()) {
+	              operation();
 	            }
-	        }
+	          }
+	        }));
+	      } else {
+	        fixes.push(new validationIssueFix({
+	          title: _t.html('issues.fix.connect_features.title')
+	        }));
+	      }
 
-	        calcBBox$1(node, this.toBBox);
+	      return fixes;
+	    }
 
-	        return node;
-	    },
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.disconnected_way.routable.reference'));
+	    }
 
-	    _chooseSubtree: function (bbox, node, level, path) {
+	    function routingIslandForEntity(entity) {
+	      var routingIsland = new Set(); // the interconnected routable features
 
-	        var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;
+	      var waysToCheck = []; // the queue of remaining routable ways to traverse
 
-	        while (true) {
-	            path.push(node);
+	      function queueParentWays(node) {
+	        graph.parentWays(node).forEach(function (parentWay) {
+	          if (!routingIsland.has(parentWay) && // only check each feature once
+	          isRoutableWay(parentWay, false)) {
+	            // only check routable features
+	            routingIsland.add(parentWay);
+	            waysToCheck.push(parentWay);
+	          }
+	        });
+	      }
 
-	            if (node.leaf || path.length - 1 === level) { break; }
+	      if (entity.type === 'way' && isRoutableWay(entity, true)) {
+	        routingIsland.add(entity);
+	        waysToCheck.push(entity);
+	      } else if (entity.type === 'node' && isRoutableNode(entity)) {
+	        routingIsland.add(entity);
+	        queueParentWays(entity);
+	      } else {
+	        // this feature isn't routable, cannot be a routing island
+	        return null;
+	      }
 
-	            minArea = minEnlargement = Infinity;
+	      while (waysToCheck.length) {
+	        var wayToCheck = waysToCheck.pop();
+	        var childNodes = graph.childNodes(wayToCheck);
 
-	            for (i = 0, len = node.children.length; i < len; i++) {
-	                child = node.children[i];
-	                area = bboxArea$1(child);
-	                enlargement = enlargedArea$1(bbox, child) - area;
+	        for (var i in childNodes) {
+	          var vertex = childNodes[i];
 
-	                // choose entry with the least area enlargement
-	                if (enlargement < minEnlargement) {
-	                    minEnlargement = enlargement;
-	                    minArea = area < minArea ? area : minArea;
-	                    targetNode = child;
+	          if (isConnectedVertex(vertex)) {
+	            // found a link to the wider network, not a routing island
+	            return null;
+	          }
 
-	                } else if (enlargement === minEnlargement) {
-	                    // otherwise choose one with the smallest area
-	                    if (area < minArea) {
-	                        minArea = area;
-	                        targetNode = child;
-	                    }
-	                }
-	            }
+	          if (isRoutableNode(vertex)) {
+	            routingIsland.add(vertex);
+	          }
 
-	            node = targetNode || node.children[0];
+	          queueParentWays(vertex);
 	        }
+	      } // no network link found, this is a routing island, return its members
 
-	        return node;
-	    },
 
-	    _insert: function (item, level, isNode) {
+	      return routingIsland;
+	    }
+
+	    function isConnectedVertex(vertex) {
+	      // assume ways overlapping unloaded tiles are connected to the wider road network  - #5938
+	      var osm = services.osm;
+	      if (osm && !osm.isDataLoaded(vertex.loc)) return true; // entrances are considered connected
 
-	        var toBBox = this.toBBox,
-	            bbox = isNode ? item : toBBox(item),
-	            insertPath = [];
+	      if (vertex.tags.entrance && vertex.tags.entrance !== 'no') return true;
+	      if (vertex.tags.amenity === 'parking_entrance') return true;
+	      return false;
+	    }
 
-	        // find the best node for accommodating the item, saving all nodes along the path too
-	        var node = this._chooseSubtree(bbox, this.data, level, insertPath);
+	    function isRoutableNode(node) {
+	      // treat elevators as distinct features in the highway network
+	      if (node.tags.highway === 'elevator') return true;
+	      return false;
+	    }
 
-	        // put the item into the node
-	        node.children.push(item);
-	        extend$3(node, bbox);
+	    function isRoutableWay(way, ignoreInnerWays) {
+	      if (isTaggedAsHighway(way) || way.tags.route === 'ferry') return true;
+	      return graph.parentRelations(way).some(function (parentRelation) {
+	        if (parentRelation.tags.type === 'route' && parentRelation.tags.route === 'ferry') return true;
+	        if (parentRelation.isMultipolygon() && isTaggedAsHighway(parentRelation) && (!ignoreInnerWays || parentRelation.memberById(way.id).role !== 'inner')) return true;
+	        return false;
+	      });
+	    }
 
-	        // split on node overflow; propagate upwards if necessary
-	        while (level >= 0) {
-	            if (insertPath[level].children.length > this._maxEntries) {
-	                this._split(insertPath, level);
-	                level--;
-	            } else { break; }
-	        }
+	    function makeContinueDrawingFixIfAllowed(textDirection, vertexID, whichEnd) {
+	      var vertex = graph.hasEntity(vertexID);
+	      if (!vertex || vertex.tags.noexit === 'yes') return null;
+	      var useLeftContinue = whichEnd === 'start' && textDirection === 'ltr' || whichEnd === 'end' && textDirection === 'rtl';
+	      return new validationIssueFix({
+	        icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
+	        title: _t.html('issues.fix.continue_from_' + whichEnd + '.title'),
+	        entityIds: [vertexID],
+	        onClick: function onClick(context) {
+	          var wayId = this.issue.entityIds[0];
+	          var way = context.hasEntity(wayId);
+	          var vertexId = this.entityIds[0];
+	          var vertex = context.hasEntity(vertexId);
+	          if (!way || !vertex) return; // make sure the vertex is actually visible and editable
 
-	        // adjust bboxes along the insertion path
-	        this._adjustParentBBoxes(bbox, insertPath, level);
-	    },
+	          var map = context.map();
 
-	    // split overflowed node into two
-	    _split: function (insertPath, level) {
+	          if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+	            map.zoomToEase(vertex);
+	          }
 
-	        var node = insertPath[level],
-	            M = node.children.length,
-	            m = this._minEntries;
+	          context.enter(modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true));
+	        }
+	      });
+	    }
+	  };
 
-	        this._chooseSplitAxis(node, m, M);
+	  validation.type = type;
+	  return validation;
+	}
 
-	        var splitIndex = this._chooseSplitIndex(node, m, M);
+	function validationFormatting() {
+	  var type = 'invalid_format';
 
-	        var newNode = createNode$1(node.children.splice(splitIndex, node.children.length - splitIndex));
-	        newNode.height = node.height;
-	        newNode.leaf = node.leaf;
+	  var validation = function validation(entity) {
+	    var issues = [];
 
-	        calcBBox$1(node, this.toBBox);
-	        calcBBox$1(newNode, this.toBBox);
+	    function isValidEmail(email) {
+	      // Emails in OSM are going to be official so they should be pretty simple
+	      // Using negated lists to better support all possible unicode characters (#6494)
+	      var valid_email = /^[^\(\)\\,":;<>@\[\]]+@[^\(\)\\,":;<>@\[\]\.]+(?:\.[a-z0-9-]+)*$/i; // An empty value is also acceptable
 
-	        if (level) { insertPath[level - 1].children.push(newNode); }
-	        else { this._splitRoot(node, newNode); }
-	    },
+	      return !email || valid_email.test(email);
+	    }
 
-	    _splitRoot: function (node, newNode) {
-	        // split root node
-	        this.data = createNode$1([node, newNode]);
-	        this.data.height = node.height + 1;
-	        this.data.leaf = false;
-	        calcBBox$1(this.data, this.toBBox);
-	    },
+	    function showReferenceEmail(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.invalid_format.email.reference'));
+	    }
+	    /* see https://github.com/openstreetmap/iD/issues/6831#issuecomment-537121379
+	    function isSchemePresent(url) {
+	        var valid_scheme = /^https?:\/\//i;
+	        return (!url || valid_scheme.test(url));
+	    }
+	    function showReferenceWebsite(selection) {
+	        selection.selectAll('.issue-reference')
+	            .data([0])
+	            .enter()
+	            .append('div')
+	            .attr('class', 'issue-reference')
+	            .call(t.append('issues.invalid_format.website.reference'));
+	    }
+	     if (entity.tags.website) {
+	        // Multiple websites are possible
+	        // If ever we support ES6, arrow functions make this nicer
+	        var websites = entity.tags.website
+	            .split(';')
+	            .map(function(s) { return s.trim(); })
+	            .filter(function(x) { return !isSchemePresent(x); });
+	         if (websites.length) {
+	            issues.push(new validationIssue({
+	                type: type,
+	                subtype: 'website',
+	                severity: 'warning',
+	                message: function(context) {
+	                    var entity = context.hasEntity(this.entityIds[0]);
+	                    return entity ? t.html('issues.invalid_format.website.message' + this.data,
+	                        { feature: utilDisplayLabel(entity, context.graph()), site: websites.join(', ') }) : '';
+	                },
+	                reference: showReferenceWebsite,
+	                entityIds: [entity.id],
+	                hash: websites.join(),
+	                data: (websites.length > 1) ? '_multi' : ''
+	            }));
+	        }
+	    }*/
 
-	    _chooseSplitIndex: function (node, m, M) {
 
-	        var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;
+	    if (entity.tags.email) {
+	      // Multiple emails are possible
+	      var emails = entity.tags.email.split(';').map(function (s) {
+	        return s.trim();
+	      }).filter(function (x) {
+	        return !isValidEmail(x);
+	      });
 
-	        minOverlap = minArea = Infinity;
+	      if (emails.length) {
+	        issues.push(new validationIssue({
+	          type: type,
+	          subtype: 'email',
+	          severity: 'warning',
+	          message: function message(context) {
+	            var entity = context.hasEntity(this.entityIds[0]);
+	            return entity ? _t.html('issues.invalid_format.email.message' + this.data, {
+	              feature: utilDisplayLabel(entity, context.graph()),
+	              email: emails.join(', ')
+	            }) : '';
+	          },
+	          reference: showReferenceEmail,
+	          entityIds: [entity.id],
+	          hash: emails.join(),
+	          data: emails.length > 1 ? '_multi' : ''
+	        }));
+	      }
+	    }
 
-	        for (i = m; i <= M - m; i++) {
-	            bbox1 = distBBox$1(node, 0, i, this.toBBox);
-	            bbox2 = distBBox$1(node, i, M, this.toBBox);
+	    return issues;
+	  };
 
-	            overlap = intersectionArea$1(bbox1, bbox2);
-	            area = bboxArea$1(bbox1) + bboxArea$1(bbox2);
+	  validation.type = type;
+	  return validation;
+	}
 
-	            // choose distribution with minimum overlap
-	            if (overlap < minOverlap) {
-	                minOverlap = overlap;
-	                index = i;
+	function validationHelpRequest(context) {
+	  var type = 'help_request';
 
-	                minArea = area < minArea ? area : minArea;
+	  var validation = function checkFixmeTag(entity) {
+	    if (!entity.tags.fixme) return []; // don't flag fixmes on features added by the user
 
-	            } else if (overlap === minOverlap) {
-	                // otherwise choose distribution with minimum area
-	                if (area < minArea) {
-	                    minArea = area;
-	                    index = i;
-	                }
-	            }
-	        }
+	    if (entity.version === undefined) return [];
 
-	        return index;
-	    },
+	    if (entity.v !== undefined) {
+	      var baseEntity = context.history().base().hasEntity(entity.id); // don't flag fixmes added by the user on existing features
 
-	    // sorts node children by the best axis for split
-	    _chooseSplitAxis: function (node, m, M) {
+	      if (!baseEntity || !baseEntity.tags.fixme) return [];
+	    }
 
-	        var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX$1,
-	            compareMinY = node.leaf ? this.compareMinY : compareNodeMinY$1,
-	            xMargin = this._allDistMargin(node, m, M, compareMinX),
-	            yMargin = this._allDistMargin(node, m, M, compareMinY);
+	    return [new validationIssue({
+	      type: type,
+	      subtype: 'fixme_tag',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        return entity ? _t.html('issues.fixme_tag.message', {
+	          feature: utilDisplayLabel(entity, context.graph(), true
+	          /* verbose */
+	          )
+	        }) : '';
+	      },
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          title: _t.html('issues.fix.address_the_concern.title')
+	        })];
+	      },
+	      reference: showReference,
+	      entityIds: [entity.id]
+	    })];
 
-	        // if total distributions margin value is minimal for x, sort by minX,
-	        // otherwise it's already sorted by minY
-	        if (xMargin < yMargin) { node.children.sort(compareMinX); }
-	    },
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.fixme_tag.reference'));
+	    }
+	  };
 
-	    // total margin of all possible split distributions where each node is at least m full
-	    _allDistMargin: function (node, m, M, compare) {
+	  validation.type = type;
+	  return validation;
+	}
 
-	        node.children.sort(compare);
+	function validationImpossibleOneway() {
+	  var type = 'impossible_oneway';
+
+	  var validation = function checkImpossibleOneway(entity, graph) {
+	    if (entity.type !== 'way' || entity.geometry(graph) !== 'line') return [];
+	    if (entity.isClosed()) return [];
+	    if (!typeForWay(entity)) return [];
+	    if (!isOneway(entity)) return [];
+	    var firstIssues = issuesForNode(entity, entity.first());
+	    var lastIssues = issuesForNode(entity, entity.last());
+	    return firstIssues.concat(lastIssues);
+
+	    function typeForWay(way) {
+	      if (way.geometry(graph) !== 'line') return null;
+	      if (osmRoutableHighwayTagValues[way.tags.highway]) return 'highway';
+	      if (osmFlowingWaterwayTagValues[way.tags.waterway]) return 'waterway';
+	      return null;
+	    }
 
-	        var toBBox = this.toBBox,
-	            leftBBox = distBBox$1(node, 0, m, toBBox),
-	            rightBBox = distBBox$1(node, M - m, M, toBBox),
-	            margin = bboxMargin$1(leftBBox) + bboxMargin$1(rightBBox),
-	            i, child;
+	    function isOneway(way) {
+	      if (way.tags.oneway === 'yes') return true;
+	      if (way.tags.oneway) return false;
 
-	        for (i = m; i < M - m; i++) {
-	            child = node.children[i];
-	            extend$3(leftBBox, node.leaf ? toBBox(child) : child);
-	            margin += bboxMargin$1(leftBBox);
+	      for (var key in way.tags) {
+	        if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
+	          return true;
 	        }
+	      }
 
-	        for (i = M - m - 1; i >= m; i--) {
-	            child = node.children[i];
-	            extend$3(rightBBox, node.leaf ? toBBox(child) : child);
-	            margin += bboxMargin$1(rightBBox);
-	        }
+	      return false;
+	    }
 
-	        return margin;
-	    },
+	    function nodeOccursMoreThanOnce(way, nodeID) {
+	      var occurrences = 0;
 
-	    _adjustParentBBoxes: function (bbox, path, level) {
-	        // adjust bboxes along the given tree path
-	        for (var i = level; i >= 0; i--) {
-	            extend$3(path[i], bbox);
+	      for (var index in way.nodes) {
+	        if (way.nodes[index] === nodeID) {
+	          occurrences += 1;
+	          if (occurrences > 1) return true;
 	        }
-	    },
+	      }
 
-	    _condense: function (path) {
-	        // go through the path, removing empty nodes and updating bboxes
-	        for (var i = path.length - 1, siblings; i >= 0; i--) {
-	            if (path[i].children.length === 0) {
-	                if (i > 0) {
-	                    siblings = path[i - 1].children;
-	                    siblings.splice(siblings.indexOf(path[i]), 1);
+	      return false;
+	    }
 
-	                } else { this.clear(); }
+	    function isConnectedViaOtherTypes(way, node) {
+	      var wayType = typeForWay(way);
 
-	            } else { calcBBox$1(path[i], this.toBBox); }
+	      if (wayType === 'highway') {
+	        // entrances are considered connected
+	        if (node.tags.entrance && node.tags.entrance !== 'no') return true;
+	        if (node.tags.amenity === 'parking_entrance') return true;
+	      } else if (wayType === 'waterway') {
+	        if (node.id === way.first()) {
+	          // multiple waterways may start at the same spring
+	          if (node.tags.natural === 'spring') return true;
+	        } else {
+	          // multiple waterways may end at the same drain
+	          if (node.tags.manhole === 'drain') return true;
 	        }
-	    },
-
-	    _initFormat: function (format) {
-	        // data format (minX, minY, maxX, maxY accessors)
-
-	        // uses eval-type function compilation instead of just accepting a toBBox function
-	        // because the algorithms are very sensitive to sorting functions performance,
-	        // so they should be dead simple and without inner calls
+	      }
 
-	        var compareArr = ['return a', ' - b', ';'];
+	      return graph.parentWays(node).some(function (parentWay) {
+	        if (parentWay.id === way.id) return false;
 
-	        this.compareMinX = new Function('a', 'b', compareArr.join(format[0]));
-	        this.compareMinY = new Function('a', 'b', compareArr.join(format[1]));
+	        if (wayType === 'highway') {
+	          // allow connections to highway areas
+	          if (parentWay.geometry(graph) === 'area' && osmRoutableHighwayTagValues[parentWay.tags.highway]) return true; // count connections to ferry routes as connected
 
-	        this.toBBox = new Function('a',
-	            'return {minX: a' + format[0] +
-	            ', minY: a' + format[1] +
-	            ', maxX: a' + format[2] +
-	            ', maxY: a' + format[3] + '};');
-	    }
-	};
+	          if (parentWay.tags.route === 'ferry') return true;
+	          return graph.parentRelations(parentWay).some(function (parentRelation) {
+	            if (parentRelation.tags.type === 'route' && parentRelation.tags.route === 'ferry') return true; // allow connections to highway multipolygons
 
-	function findItem$1(item, items, equalsFn) {
-	    if (!equalsFn) { return items.indexOf(item); }
+	            return parentRelation.isMultipolygon() && osmRoutableHighwayTagValues[parentRelation.tags.highway];
+	          });
+	        } else if (wayType === 'waterway') {
+	          // multiple waterways may start or end at a water body at the same node
+	          if (parentWay.tags.natural === 'water' || parentWay.tags.natural === 'coastline') return true;
+	        }
 
-	    for (var i = 0; i < items.length; i++) {
-	        if (equalsFn(item, items[i])) { return i; }
+	        return false;
+	      });
 	    }
-	    return -1;
-	}
 
-	// calculate node's bbox from bboxes of its children
-	function calcBBox$1(node, toBBox) {
-	    distBBox$1(node, 0, node.children.length, toBBox, node);
-	}
+	    function issuesForNode(way, nodeID) {
+	      var isFirst = nodeID === way.first();
+	      var wayType = typeForWay(way); // ignore if this way is self-connected at this node
 
-	// min bounding rectangle of node children from k to p-1
-	function distBBox$1(node, k, p, toBBox, destNode) {
-	    if (!destNode) { destNode = createNode$1(null); }
-	    destNode.minX = Infinity;
-	    destNode.minY = Infinity;
-	    destNode.maxX = -Infinity;
-	    destNode.maxY = -Infinity;
+	      if (nodeOccursMoreThanOnce(way, nodeID)) return [];
+	      var osm = services.osm;
+	      if (!osm) return [];
+	      var node = graph.hasEntity(nodeID); // ignore if this node or its tile are unloaded
+
+	      if (!node || !osm.isDataLoaded(node.loc)) return [];
+	      if (isConnectedViaOtherTypes(way, node)) return [];
+	      var attachedWaysOfSameType = graph.parentWays(node).filter(function (parentWay) {
+	        if (parentWay.id === way.id) return false;
+	        return typeForWay(parentWay) === wayType;
+	      }); // assume it's okay for waterways to start or end disconnected for now
+
+	      if (wayType === 'waterway' && attachedWaysOfSameType.length === 0) return [];
+	      var attachedOneways = attachedWaysOfSameType.filter(function (attachedWay) {
+	        return isOneway(attachedWay);
+	      }); // ignore if the way is connected to some non-oneway features
+
+	      if (attachedOneways.length < attachedWaysOfSameType.length) return [];
+
+	      if (attachedOneways.length) {
+	        var connectedEndpointsOkay = attachedOneways.some(function (attachedOneway) {
+	          if ((isFirst ? attachedOneway.first() : attachedOneway.last()) !== nodeID) return true;
+	          if (nodeOccursMoreThanOnce(attachedOneway, nodeID)) return true;
+	          return false;
+	        });
+	        if (connectedEndpointsOkay) return [];
+	      }
 
-	    for (var i = k, child; i < p; i++) {
-	        child = node.children[i];
-	        extend$3(destNode, node.leaf ? toBBox(child) : child);
-	    }
+	      var placement = isFirst ? 'start' : 'end',
+	          messageID = wayType + '.',
+	          referenceID = wayType + '.';
 
-	    return destNode;
-	}
+	      if (wayType === 'waterway') {
+	        messageID += 'connected.' + placement;
+	        referenceID += 'connected';
+	      } else {
+	        messageID += placement;
+	        referenceID += placement;
+	      }
 
-	function extend$3(a, b) {
-	    a.minX = Math.min(a.minX, b.minX);
-	    a.minY = Math.min(a.minY, b.minY);
-	    a.maxX = Math.max(a.maxX, b.maxX);
-	    a.maxY = Math.max(a.maxY, b.maxY);
-	    return a;
-	}
+	      return [new validationIssue({
+	        type: type,
+	        subtype: wayType,
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.impossible_oneway.' + messageID + '.message', {
+	            feature: utilDisplayLabel(entity, context.graph())
+	          }) : '';
+	        },
+	        reference: getReference(referenceID),
+	        entityIds: [way.id, node.id],
+	        dynamicFixes: function dynamicFixes() {
+	          var fixes = [];
 
-	function compareNodeMinX$1(a, b) { return a.minX - b.minX; }
-	function compareNodeMinY$1(a, b) { return a.minY - b.minY; }
+	          if (attachedOneways.length) {
+	            fixes.push(new validationIssueFix({
+	              icon: 'iD-operation-reverse',
+	              title: _t.html('issues.fix.reverse_feature.title'),
+	              entityIds: [way.id],
+	              onClick: function onClick(context) {
+	                var id = this.issue.entityIds[0];
+	                context.perform(actionReverse(id), _t('operations.reverse.annotation.line', {
+	                  n: 1
+	                }));
+	              }
+	            }));
+	          }
 
-	function bboxArea$1(a)   { return (a.maxX - a.minX) * (a.maxY - a.minY); }
-	function bboxMargin$1(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }
+	          if (node.tags.noexit !== 'yes') {
+	            var textDirection = _mainLocalizer.textDirection();
+	            var useLeftContinue = isFirst && textDirection === 'ltr' || !isFirst && textDirection === 'rtl';
+	            fixes.push(new validationIssueFix({
+	              icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
+	              title: _t.html('issues.fix.continue_from_' + (isFirst ? 'start' : 'end') + '.title'),
+	              onClick: function onClick(context) {
+	                var entityID = this.issue.entityIds[0];
+	                var vertexID = this.issue.entityIds[1];
+	                var way = context.entity(entityID);
+	                var vertex = context.entity(vertexID);
+	                continueDrawing(way, vertex, context);
+	              }
+	            }));
+	          }
 
-	function enlargedArea$1(a, b) {
-	    return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) *
-	           (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
-	}
+	          return fixes;
+	        },
+	        loc: node.loc
+	      })];
 
-	function intersectionArea$1(a, b) {
-	    var minX = Math.max(a.minX, b.minX),
-	        minY = Math.max(a.minY, b.minY),
-	        maxX = Math.min(a.maxX, b.maxX),
-	        maxY = Math.min(a.maxY, b.maxY);
+	      function getReference(referenceID) {
+	        return function showReference(selection) {
+	          selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.impossible_oneway.' + referenceID + '.reference'));
+	        };
+	      }
+	    }
+	  };
 
-	    return Math.max(0, maxX - minX) *
-	           Math.max(0, maxY - minY);
-	}
+	  function continueDrawing(way, vertex, context) {
+	    // make sure the vertex is actually visible and editable
+	    var map = context.map();
 
-	function contains$2(a, b) {
-	    return a.minX <= b.minX &&
-	           a.minY <= b.minY &&
-	           b.maxX <= a.maxX &&
-	           b.maxY <= a.maxY;
-	}
+	    if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+	      map.zoomToEase(vertex);
+	    }
 
-	function intersects$1(a, b) {
-	    return b.minX <= a.maxX &&
-	           b.minY <= a.maxY &&
-	           b.maxX >= a.minX &&
-	           b.maxY >= a.minY;
-	}
+	    context.enter(modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true));
+	  }
 
-	function createNode$1(children) {
-	    return {
-	        children: children,
-	        height: 1,
-	        leaf: true,
-	        minX: Infinity,
-	        minY: Infinity,
-	        maxX: -Infinity,
-	        maxY: -Infinity
-	    };
+	  validation.type = type;
+	  return validation;
 	}
 
-	// sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
-	// combines selection algorithm with binary divide & conquer approach
+	function validationIncompatibleSource() {
+	  var type = 'incompatible_source';
+	  var incompatibleRules = [{
+	    id: 'amap',
+	    regex: /(^amap$|^amap\.com|autonavi|mapabc|高德)/i
+	  }, {
+	    id: 'baidu',
+	    regex: /(baidu|mapbar|百度)/i
+	  }, {
+	    id: 'google',
+	    regex: /google/i,
+	    exceptRegex: /((books|drive)\.google|google\s?(books|drive|plus))|(esri\/Google_Africa_Buildings)/i
+	  }];
+
+	  var validation = function checkIncompatibleSource(entity) {
+	    var entitySources = entity.tags && entity.tags.source && entity.tags.source.split(';');
+	    if (!entitySources) return [];
+	    var entityID = entity.id;
+	    return entitySources.map(function (source) {
+	      var matchRule = incompatibleRules.find(function (rule) {
+	        if (!rule.regex.test(source)) return false;
+	        if (rule.exceptRegex && rule.exceptRegex.test(source)) return false;
+	        return true;
+	      });
+	      if (!matchRule) return null;
+	      return new validationIssue({
+	        type: type,
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(entityID);
+	          return entity ? _t.html('issues.incompatible_source.feature.message', {
+	            feature: utilDisplayLabel(entity, context.graph(), true
+	            /* verbose */
+	            ),
+	            value: source
+	          }) : '';
+	        },
+	        reference: getReference(matchRule.id),
+	        entityIds: [entityID],
+	        hash: source,
+	        dynamicFixes: function dynamicFixes() {
+	          return [new validationIssueFix({
+	            title: _t.html('issues.fix.remove_proprietary_data.title')
+	          })];
+	        }
+	      });
+	    }).filter(Boolean);
 
-	function multiSelect$1(arr, left, right, n, compare) {
-	    var stack = [left, right],
-	        mid;
+	    function getReference(id) {
+	      return function showReference(selection) {
+	        selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append("issues.incompatible_source.reference.".concat(id)));
+	      };
+	    }
+	  };
 
-	    while (stack.length) {
-	        right = stack.pop();
-	        left = stack.pop();
+	  validation.type = type;
+	  return validation;
+	}
 
-	        if (right - left <= n) { continue; }
+	function validationMaprules() {
+	  var type = 'maprules';
 
-	        mid = left + Math.ceil((right - left) / n / 2) * n;
-	        quickselect$1(arr, mid, left, right, compare);
+	  var validation = function checkMaprules(entity, graph) {
+	    if (!services.maprules) return [];
+	    var rules = services.maprules.validationRules();
+	    var issues = [];
 
-	        stack.push(left, mid, mid, right);
+	    for (var i = 0; i < rules.length; i++) {
+	      var rule = rules[i];
+	      rule.findIssues(entity, graph, issues);
 	    }
-	}
-	rbush_1.default = _default$2;
 
-	var lineclip_1$1 = lineclip$1;
+	    return issues;
+	  };
 
-	lineclip$1.polyline = lineclip$1;
-	lineclip$1.polygon = polygonclip$1;
+	  validation.type = type;
+	  return validation;
+	}
 
+	function validationMismatchedGeometry() {
+	  var type = 'mismatched_geometry';
 
-	// Cohen-Sutherland line clippign algorithm, adapted to efficiently
-	// handle polylines rather than just segments
+	  function tagSuggestingLineIsArea(entity) {
+	    if (entity.type !== 'way' || entity.isClosed()) return null;
+	    var tagSuggestingArea = entity.tagSuggestingArea();
 
-	function lineclip$1(points, bbox, result) {
+	    if (!tagSuggestingArea) {
+	      return null;
+	    }
 
-	    var len = points.length,
-	        codeA = bitCode$1(points[0], bbox),
-	        part = [],
-	        i, a, b, codeB, lastCode;
+	    var asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
+	    var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');
 
-	    if (!result) { result = []; }
+	    if (asLine && asArea && asLine === asArea) {
+	      // these tags also allow lines and making this an area wouldn't matter
+	      return null;
+	    }
 
-	    for (i = 1; i < len; i++) {
-	        a = points[i - 1];
-	        b = points[i];
-	        codeB = lastCode = bitCode$1(b, bbox);
+	    return tagSuggestingArea;
+	  }
 
-	        while (true) {
+	  function makeConnectEndpointsFixOnClick(way, graph) {
+	    // must have at least three nodes to close this automatically
+	    if (way.nodes.length < 3) return null;
+	    var nodes = graph.childNodes(way),
+	        testNodes;
+	    var firstToLastDistanceMeters = geoSphericalDistance(nodes[0].loc, nodes[nodes.length - 1].loc); // if the distance is very small, attempt to merge the endpoints
 
-	            if (!(codeA | codeB)) { // accept
-	                part.push(a);
+	    if (firstToLastDistanceMeters < 0.75) {
+	      testNodes = nodes.slice(); // shallow copy
 
-	                if (codeB !== lastCode) { // segment went outside
-	                    part.push(b);
+	      testNodes.pop();
+	      testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
-	                    if (i < len - 1) { // start a new line
-	                        result.push(part);
-	                        part = [];
-	                    }
-	                } else if (i === len - 1) {
-	                    part.push(b);
-	                }
-	                break;
+	      if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
+	        return function (context) {
+	          var way = context.entity(this.issue.entityIds[0]);
+	          context.perform(actionMergeNodes([way.nodes[0], way.nodes[way.nodes.length - 1]], nodes[0].loc), _t('issues.fix.connect_endpoints.annotation'));
+	        };
+	      }
+	    } // if the points were not merged, attempt to close the way
 
-	            } else if (codeA & codeB) { // trivial reject
-	                break;
 
-	            } else if (codeA) { // a outside, intersect with clip edge
-	                a = intersect$1(a, b, codeA, bbox);
-	                codeA = bitCode$1(a, bbox);
+	    testNodes = nodes.slice(); // shallow copy
 
-	            } else { // b outside
-	                b = intersect$1(a, b, codeB, bbox);
-	                codeB = bitCode$1(b, bbox);
-	            }
-	        }
+	    testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
-	        codeA = lastCode;
+	    if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
+	      return function (context) {
+	        var wayId = this.issue.entityIds[0];
+	        var way = context.entity(wayId);
+	        var nodeId = way.nodes[0];
+	        var index = way.nodes.length;
+	        context.perform(actionAddVertex(wayId, nodeId, index), _t('issues.fix.connect_endpoints.annotation'));
+	      };
 	    }
+	  }
 
-	    if (part.length) { result.push(part); }
-
-	    return result;
-	}
+	  function lineTaggedAsAreaIssue(entity) {
+	    var tagSuggestingArea = tagSuggestingLineIsArea(entity);
+	    if (!tagSuggestingArea) return null;
+	    return new validationIssue({
+	      type: type,
+	      subtype: 'area_as_line',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        return entity ? _t.html('issues.tag_suggests_area.message', {
+	          feature: utilDisplayLabel(entity, 'area', true
+	          /* verbose */
+	          ),
+	          tag: utilTagText({
+	            tags: tagSuggestingArea
+	          })
+	        }) : '';
+	      },
+	      reference: showReference,
+	      entityIds: [entity.id],
+	      hash: JSON.stringify(tagSuggestingArea),
+	      dynamicFixes: function dynamicFixes(context) {
+	        var fixes = [];
+	        var entity = context.entity(this.entityIds[0]);
+	        var connectEndsOnClick = makeConnectEndpointsFixOnClick(entity, context.graph());
+	        fixes.push(new validationIssueFix({
+	          title: _t.html('issues.fix.connect_endpoints.title'),
+	          onClick: connectEndsOnClick
+	        }));
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.remove_tag.title'),
+	          onClick: function onClick(context) {
+	            var entityId = this.issue.entityIds[0];
+	            var entity = context.entity(entityId);
+	            var tags = Object.assign({}, entity.tags); // shallow copy
 
-	// Sutherland-Hodgeman polygon clipping algorithm
+	            for (var key in tagSuggestingArea) {
+	              delete tags[key];
+	            }
 
-	function polygonclip$1(points, bbox) {
+	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_tag.annotation'));
+	          }
+	        }));
+	        return fixes;
+	      }
+	    });
 
-	    var result, edge, prev, prevInside, i, p, inside;
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.tag_suggests_area.reference'));
+	    }
+	  }
 
-	    // clip against each side of the clip rectangle
-	    for (edge = 1; edge <= 8; edge *= 2) {
-	        result = [];
-	        prev = points[points.length - 1];
-	        prevInside = !(bitCode$1(prev, bbox) & edge);
+	  function vertexPointIssue(entity, graph) {
+	    // we only care about nodes
+	    if (entity.type !== 'node') return null; // ignore tagless points
 
-	        for (i = 0; i < points.length; i++) {
-	            p = points[i];
-	            inside = !(bitCode$1(p, bbox) & edge);
+	    if (Object.keys(entity.tags).length === 0) return null; // address lines are special so just ignore them
 
-	            // if segment goes through the clip window, add an intersection
-	            if (inside !== prevInside) { result.push(intersect$1(prev, p, edge, bbox)); }
+	    if (entity.isOnAddressLine(graph)) return null;
+	    var geometry = entity.geometry(graph);
+	    var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
 
-	            if (inside) { result.push(p); } // add a point if it's inside
+	    if (geometry === 'point' && !allowedGeometries.point && allowedGeometries.vertex) {
+	      return new validationIssue({
+	        type: type,
+	        subtype: 'vertex_as_point',
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.vertex_as_point.message', {
+	            feature: utilDisplayLabel(entity, 'vertex', true
+	            /* verbose */
+	            )
+	          }) : '';
+	        },
+	        reference: function showReference(selection) {
+	          selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.vertex_as_point.reference'));
+	        },
+	        entityIds: [entity.id]
+	      });
+	    } else if (geometry === 'vertex' && !allowedGeometries.vertex && allowedGeometries.point) {
+	      return new validationIssue({
+	        type: type,
+	        subtype: 'point_as_vertex',
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.point_as_vertex.message', {
+	            feature: utilDisplayLabel(entity, 'point', true
+	            /* verbose */
+	            )
+	          }) : '';
+	        },
+	        reference: function showReference(selection) {
+	          selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.point_as_vertex.reference'));
+	        },
+	        entityIds: [entity.id],
+	        dynamicFixes: extractPointDynamicFixes
+	      });
+	    }
 
-	            prev = p;
-	            prevInside = inside;
-	        }
+	    return null;
+	  }
 
-	        points = result;
+	  function otherMismatchIssue(entity, graph) {
+	    // ignore boring features
+	    if (!entity.hasInterestingTags()) return null;
+	    if (entity.type !== 'node' && entity.type !== 'way') return null; // address lines are special so just ignore them
+
+	    if (entity.type === 'node' && entity.isOnAddressLine(graph)) return null;
+	    var sourceGeom = entity.geometry(graph);
+	    var targetGeoms = entity.type === 'way' ? ['point', 'vertex'] : ['line', 'area'];
+	    if (sourceGeom === 'area') targetGeoms.unshift('line');
+	    var asSource = _mainPresetIndex.match(entity, graph);
+	    var targetGeom = targetGeoms.find(function (nodeGeom) {
+	      var asTarget = _mainPresetIndex.matchTags(entity.tags, nodeGeom);
+	      if (!asSource || !asTarget || asSource === asTarget || // sometimes there are two presets with the same tags for different geometries
+	      fastDeepEqual(asSource.tags, asTarget.tags)) return false;
+	      if (asTarget.isFallback()) return false;
+	      var primaryKey = Object.keys(asTarget.tags)[0]; // special case: buildings-as-points are discouraged by iD, but common in OSM, so ignore them
+
+	      if (primaryKey === 'building') return false;
+	      if (asTarget.tags[primaryKey] === '*') return false;
+	      return asSource.isFallback() || asSource.tags[primaryKey] === '*';
+	    });
+	    if (!targetGeom) return null;
+	    var subtype = targetGeom + '_as_' + sourceGeom;
+	    if (targetGeom === 'vertex') targetGeom = 'point';
+	    if (sourceGeom === 'vertex') sourceGeom = 'point';
+	    var referenceId = targetGeom + '_as_' + sourceGeom;
+	    var dynamicFixes;
 
-	        if (!points.length) { break; }
+	    if (targetGeom === 'point') {
+	      dynamicFixes = extractPointDynamicFixes;
+	    } else if (sourceGeom === 'area' && targetGeom === 'line') {
+	      dynamicFixes = lineToAreaDynamicFixes;
 	    }
 
-	    return result;
-	}
+	    return new validationIssue({
+	      type: type,
+	      subtype: subtype,
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        return entity ? _t.html('issues.' + referenceId + '.message', {
+	          feature: utilDisplayLabel(entity, targetGeom, true
+	          /* verbose */
+	          )
+	        }) : '';
+	      },
+	      reference: function showReference(selection) {
+	        selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.mismatched_geometry.reference'));
+	      },
+	      entityIds: [entity.id],
+	      dynamicFixes: dynamicFixes
+	    });
+	  }
 
-	// intersect a segment against one of the 4 lines that make up the bbox
+	  function lineToAreaDynamicFixes(context) {
+	    var convertOnClick;
+	    var entityId = this.entityIds[0];
+	    var entity = context.entity(entityId);
+	    var tags = Object.assign({}, entity.tags); // shallow copy
 
-	function intersect$1(a, b, edge, bbox) {
-	    return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
-	           edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
-	           edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
-	           edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
-	           null;
-	}
+	    delete tags.area;
 
-	// bit code reflects the point position relative to the bbox:
+	    if (!osmTagSuggestingArea(tags)) {
+	      // if removing the area tag would make this a line, offer that as a quick fix
+	      convertOnClick = function convertOnClick(context) {
+	        var entityId = this.issue.entityIds[0];
+	        var entity = context.entity(entityId);
+	        var tags = Object.assign({}, entity.tags); // shallow copy
 
-	//         left  mid  right
-	//    top  1001  1000  1010
-	//    mid  0001  0000  0010
-	// bottom  0101  0100  0110
+	        if (tags.area) {
+	          delete tags.area;
+	        }
 
-	function bitCode$1(p, bbox) {
-	    var code = 0;
+	        context.perform(actionChangeTags(entityId, tags), _t('issues.fix.convert_to_line.annotation'));
+	      };
+	    }
 
-	    if (p[0] < bbox[0]) { code |= 1; } // left
-	    else if (p[0] > bbox[2]) { code |= 2; } // right
+	    return [new validationIssueFix({
+	      icon: 'iD-icon-line',
+	      title: _t.html('issues.fix.convert_to_line.title'),
+	      onClick: convertOnClick
+	    })];
+	  }
 
-	    if (p[1] < bbox[1]) { code |= 4; } // bottom
-	    else if (p[1] > bbox[3]) { code |= 8; } // top
+	  function extractPointDynamicFixes(context) {
+	    var entityId = this.entityIds[0];
+	    var extractOnClick = null;
 
-	    return code;
-	}
+	    if (!context.hasHiddenConnections(entityId)) {
+	      extractOnClick = function extractOnClick(context) {
+	        var entityId = this.issue.entityIds[0];
+	        var action = actionExtract(entityId, context.projection);
+	        context.perform(action, _t('operations.extract.annotation', {
+	          n: 1
+	        })); // re-enter mode to trigger updates
 
-	var whichPolygon_1 = whichPolygon;
+	        context.enter(modeSelect(context, [action.getExtractedNodeID()]));
+	      };
+	    }
 
-	function whichPolygon(data) {
-	    var bboxes = [];
-	    for (var i = 0; i < data.features.length; i++) {
-	        var feature = data.features[i];
-	        var coords = feature.geometry.coordinates;
+	    return [new validationIssueFix({
+	      icon: 'iD-operation-extract',
+	      title: _t.html('issues.fix.extract_point.title'),
+	      onClick: extractOnClick
+	    })];
+	  }
 
-	        if (feature.geometry.type === 'Polygon') {
-	            bboxes.push(treeItem(coords, feature.properties));
+	  function unclosedMultipolygonPartIssues(entity, graph) {
+	    if (entity.type !== 'relation' || !entity.isMultipolygon() || entity.isDegenerate() || // cannot determine issues for incompletely-downloaded relations
+	    !entity.isComplete(graph)) return [];
+	    var sequences = osmJoinWays(entity.members, graph);
+	    var issues = [];
 
-	        } else if (feature.geometry.type === 'MultiPolygon') {
-	            for (var j = 0; j < coords.length; j++) {
-	                bboxes.push(treeItem(coords[j], feature.properties));
-	            }
-	        }
+	    for (var i in sequences) {
+	      var sequence = sequences[i];
+	      if (!sequence.nodes) continue;
+	      var firstNode = sequence.nodes[0];
+	      var lastNode = sequence.nodes[sequence.nodes.length - 1]; // part is closed if the first and last nodes are the same
+
+	      if (firstNode === lastNode) continue;
+	      var issue = new validationIssue({
+	        type: type,
+	        subtype: 'unclosed_multipolygon_part',
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.unclosed_multipolygon_part.message', {
+	            feature: utilDisplayLabel(entity, context.graph(), true
+	            /* verbose */
+	            )
+	          }) : '';
+	        },
+	        reference: showReference,
+	        loc: sequence.nodes[0].loc,
+	        entityIds: [entity.id],
+	        hash: sequence.map(function (way) {
+	          return way.id;
+	        }).join()
+	      });
+	      issues.push(issue);
 	    }
 
-	    var tree = rbush_1().load(bboxes);
+	    return issues;
 
-	    function query(p, multi) {
-	        var output = [],
-	            result = tree.search({
-	                minX: p[0],
-	                minY: p[1],
-	                maxX: p[0],
-	                maxY: p[1]
-	            });
-	        for (var i = 0; i < result.length; i++) {
-	            if (insidePolygon(result[i].coords, p)) {
-	                if (multi)
-	                    { output.push(result[i].props); }
-	                else
-	                    { return result[i].props; }
-	            }
-	        }
-	        return multi && output.length ? output : null;
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.unclosed_multipolygon_part.reference'));
 	    }
+	  }
 
-	    query.tree = tree;
-	    query.bbox = function queryBBox(bbox) {
-	        var output = [];
-	        var result = tree.search({
-	            minX: bbox[0],
-	            minY: bbox[1],
-	            maxX: bbox[2],
-	            maxY: bbox[3]
-	        });
-	        for (var i = 0; i < result.length; i++) {
-	            if (polygonIntersectsBBox(result[i].coords, bbox)) {
-	                output.push(result[i].props);
-	            }
-	        }
-	        return output;
-	    };
+	  var validation = function checkMismatchedGeometry(entity, graph) {
+	    var vertexPoint = vertexPointIssue(entity, graph);
+	    if (vertexPoint) return [vertexPoint];
+	    var lineAsArea = lineTaggedAsAreaIssue(entity);
+	    if (lineAsArea) return [lineAsArea];
+	    var mismatch = otherMismatchIssue(entity, graph);
+	    if (mismatch) return [mismatch];
+	    return unclosedMultipolygonPartIssues(entity, graph);
+	  };
 
-	    return query;
+	  validation.type = type;
+	  return validation;
 	}
 
-	function polygonIntersectsBBox(polygon, bbox) {
-	    var bboxCenter = [
-	        (bbox[0] + bbox[2]) / 2,
-	        (bbox[1] + bbox[3]) / 2
-	    ];
-	    if (insidePolygon(polygon, bboxCenter)) { return true; }
-	    for (var i = 0; i < polygon.length; i++) {
-	        if (lineclip_1$1(polygon[i], bbox).length > 0) { return true; }
-	    }
-	    return false;
-	}
+	function validationMissingRole() {
+	  var type = 'missing_role';
 
-	// ray casting algorithm for detecting if point is in polygon
-	function insidePolygon(rings, p) {
-	    var inside = false;
-	    for (var i = 0, len = rings.length; i < len; i++) {
-	        var ring = rings[i];
-	        for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
-	            if (rayIntersect(p, ring[j], ring[k])) { inside = !inside; }
-	        }
-	    }
-	    return inside;
-	}
+	  var validation = function checkMissingRole(entity, graph) {
+	    var issues = [];
 
-	function rayIntersect(p, p1, p2) {
-	    return ((p1[1] > p[1]) !== (p2[1] > p[1])) && (p[0] < (p2[0] - p1[0]) * (p[1] - p1[1]) / (p2[1] - p1[1]) + p1[0]);
-	}
+	    if (entity.type === 'way') {
+	      graph.parentRelations(entity).forEach(function (relation) {
+	        if (!relation.isMultipolygon()) return;
+	        var member = relation.memberById(entity.id);
 
-	function treeItem(coords, props) {
-	    var item = {
-	        minX: Infinity,
-	        minY: Infinity,
-	        maxX: -Infinity,
-	        maxY: -Infinity,
-	        coords: coords,
-	        props: props
-	    };
+	        if (member && isMissingRole(member)) {
+	          issues.push(makeIssue(entity, relation, member));
+	        }
+	      });
+	    } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+	      entity.indexedMembers().forEach(function (member) {
+	        var way = graph.hasEntity(member.id);
 
-	    for (var i = 0; i < coords[0].length; i++) {
-	        var p = coords[0][i];
-	        item.minX = Math.min(item.minX, p[0]);
-	        item.minY = Math.min(item.minY, p[1]);
-	        item.maxX = Math.max(item.maxX, p[0]);
-	        item.maxY = Math.max(item.maxY, p[1]);
+	        if (way && isMissingRole(member)) {
+	          issues.push(makeIssue(way, entity, member));
+	        }
+	      });
 	    }
-	    return item;
-	}
-
-	var type = "FeatureCollection";
-	var features = [{type:"Feature",properties:{m49:"680",wikidata:"Q3405693",nameEn:"Sark",country:"GB",groups:["GG","830","154","150"],level:"subterritory",driveSide:"left",roadSpeedUnit:"mph",callingCodes:["44 01481"]},geometry:{type:"MultiPolygon",coordinates:[[[[-2.36485,49.48223],[-2.65349,49.15373],[-2.09454,49.46288],[-2.36485,49.48223]]]]}},{type:"Feature",properties:{m49:"001",wikidata:"Q2",nameEn:"World",aliases:["Earth","Planet"],level:"world"},geometry:null},{type:"Feature",properties:{m49:"142",wikidata:"Q48",nameEn:"Asia",level:"region"},geometry:null},{type:"Feature",properties:{m49:"143",wikidata:"Q27275",nameEn:"Central Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"145",wikidata:"Q27293",nameEn:"Western Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"150",wikidata:"Q46",nameEn:"Europe",level:"region"},geometry:null},{type:"Feature",properties:{m49:"151",wikidata:"Q27468",nameEn:"Eastern Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"154",wikidata:"Q27479",nameEn:"Northern Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"155",wikidata:"Q27496",nameEn:"Western Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"202",wikidata:"Q132959",nameEn:"Sub-Saharan Africa",groups:["002"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"419",wikidata:"Q72829598",nameEn:"Latin America and the Caribbean",groups:["019"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"830",wikidata:"Q42314",nameEn:"Channel Islands",groups:["150","154"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"019",wikidata:"Q828",nameEn:"Americas",level:"region"},geometry:null},{type:"Feature",properties:{m49:"029",wikidata:"Q664609",nameEn:"Caribbean",groups:["419","019","003"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"034",wikidata:"Q771405",nameEn:"Southern Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"002",wikidata:"Q15",nameEn:"Africa",level:"region"},geometry:null},{type:"Feature",properties:{m49:"003",wikidata:"Q49",nameEn:"North America",groups:["019"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"017",wikidata:"Q27433",nameEn:"Middle Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"039",wikidata:"Q27449",nameEn:"Southern Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"005",wikidata:"Q18",nameEn:"South America",groups:["419","019"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"009",wikidata:"Q538",nameEn:"Oceania",level:"region"},geometry:null},{type:"Feature",properties:{m49:"061",wikidata:"Q35942",nameEn:"Polynesia",groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"014",wikidata:"Q27407",nameEn:"Eastern Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"053",wikidata:"Q45256",nameEn:"Australia and New Zealand",aliases:["Australasia"],groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"011",wikidata:"Q4412",nameEn:"Western Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"013",wikidata:"Q27611",nameEn:"Central America",groups:["419","019","003"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"021",wikidata:"Q2017699",nameEn:"Northern America",groups:["019","003"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"035",wikidata:"Q11708",nameEn:"South-eastern Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"018",wikidata:"Q27394",nameEn:"Southern Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"030",wikidata:"Q27231",nameEn:"Eastern Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"015",wikidata:"Q27381",nameEn:"Northern Africa",groups:["002"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"054",wikidata:"Q37394",nameEn:"Melanesia",groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"057",wikidata:"Q3359409",nameEn:"Micronesia",groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{iso1A2:"AC",iso1A3:"ASC",wikidata:"Q46197",nameEn:"Ascension 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-	var whichPolygonGetter = {};
-	var featuresByCode = {};
-	var idFilterRegex = /\bThe\b|\bthe\b|\band\b|\bof\b|[-_ .,()&[\]/]/g;
-	var levels = [
-	  'subterritory',
-	  'territory',
-	  'country',
-	  'intermediateRegion',
-	  'subregion',
-	  'region',
-	  'union',
-	  'world'
-	];
-	loadDerivedDataAndCaches(borders);
-	function loadDerivedDataAndCaches(borders) {
-	  var identifierProps = ['iso1A2', 'iso1A3', 'm49', 'wikidata', 'emojiFlag', 'nameEn'];
-	  var geometryFeatures = [];
-	  for (var i in borders.features) {
-	    var feature = borders.features[i];
-	    feature.properties.id = feature.properties.iso1A2 || feature.properties.m49;
-	    loadM49(feature);
-	    loadIsoStatus(feature);
-	    loadLevel(feature);
-	    loadGroups(feature);
-	    loadRoadSpeedUnit(feature);
-	    loadDriveSide(feature);
-	    loadFlag(feature);
-	    cacheFeatureByIDs(feature);
-	    if (feature.geometry) { geometryFeatures.push(feature); }
-	  }
-	  for (var i$1 in borders.features) {
-	    var feature$1 = borders.features[i$1];
-	    feature$1.properties.groups.sort(function(groupID1, groupID2) {
-	      return (
-	        levels.indexOf(featuresByCode[groupID1].properties.level) -
-	        levels.indexOf(featuresByCode[groupID2].properties.level)
-	      );
-	    });
-	    loadMembersForGroupsOf(feature$1);
-	  }
-	  var geometryOnlyCollection = {
-	    type: 'RegionFeatureCollection',
-	    features: geometryFeatures
+	    return issues;
 	  };
-	  whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);
-	  function loadGroups(feature) {
-	    var props = feature.properties;
-	    if (!props.groups) {
-	      props.groups = [];
-	    }
-	    if (props.country) {
-	      props.groups.push(props.country);
-	    }
-	    if (props.m49 !== '001') {
-	      props.groups.push('001');
-	    }
-	  }
-	  function loadM49(feature) {
-	    var props = feature.properties;
-	    if (!props.m49 && props.iso1N3) {
-	      props.m49 = props.iso1N3;
-	    }
-	  }
-	  function loadIsoStatus(feature) {
-	    var props = feature.properties;
-	    if (!props.isoStatus && props.iso1A2) {
-	      props.isoStatus = 'official';
-	    }
-	  }
-	  function loadLevel(feature) {
-	    var props = feature.properties;
-	    if (props.level) { return; }
-	    if (!props.country) {
-	      props.level = 'country';
-	    } else if (props.isoStatus === 'official') {
-	      props.level = 'territory';
-	    } else {
-	      props.level = 'subterritory';
-	    }
-	  }
-	  function loadRoadSpeedUnit(feature) {
-	    var props = feature.properties;
-	    if (props.roadSpeedUnit === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-	      props.roadSpeedUnit = 'km/h';
-	    }
-	  }
-	  function loadDriveSide(feature) {
-	    var props = feature.properties;
-	    if (props.driveSide === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-	      props.driveSide = 'right';
-	    }
-	  }
-	  function loadFlag(feature) {
-	    if (!feature.properties.iso1A2) { return; }
-	    var flag = feature.properties.iso1A2.replace(/./g, function(char) {
-	      return String.fromCodePoint(char.charCodeAt(0) + 127397);
-	    });
-	    feature.properties.emojiFlag = flag;
-	  }
-	  function loadMembersForGroupsOf(feature) {
-	    var featureID = feature.properties.id;
-	    var standardizedGroupIDs = [];
-	    for (var j in feature.properties.groups) {
-	      var groupID = feature.properties.groups[j];
-	      var groupFeature = featuresByCode[groupID];
-	      standardizedGroupIDs.push(groupFeature.properties.id);
-	      if (groupFeature.properties.members) {
-	        groupFeature.properties.members.push(featureID);
-	      } else {
-	        groupFeature.properties.members = [featureID];
-	      }
-	    }
-	    feature.properties.groups = standardizedGroupIDs;
+
+	  function isMissingRole(member) {
+	    return !member.role || !member.role.trim().length;
 	  }
-	  function cacheFeatureByIDs(feature) {
-	    for (var k in identifierProps) {
-	      var prop = identifierProps[k];
-	      var id = prop && feature.properties[prop];
-	      if (id) {
-	        id = id.replace(idFilterRegex, '').toUpperCase();
-	        featuresByCode[id] = feature;
-	      }
-	    }
-	    if (feature.properties.aliases) {
-	      for (var j in feature.properties.aliases) {
-	        var alias = feature.properties.aliases[j].replace(idFilterRegex, '').toUpperCase();
-	        featuresByCode[alias] = feature;
+
+	  function makeIssue(way, relation, member) {
+	    return new validationIssue({
+	      type: type,
+	      severity: 'warning',
+	      message: function message(context) {
+	        var member = context.hasEntity(this.entityIds[1]),
+	            relation = context.hasEntity(this.entityIds[0]);
+	        return member && relation ? _t.html('issues.missing_role.message', {
+	          member: utilDisplayLabel(member, context.graph()),
+	          relation: utilDisplayLabel(relation, context.graph())
+	        }) : '';
+	      },
+	      reference: showReference,
+	      entityIds: [relation.id, way.id],
+	      data: {
+	        member: member
+	      },
+	      hash: member.index.toString(),
+	      dynamicFixes: function dynamicFixes() {
+	        return [makeAddRoleFix('inner'), makeAddRoleFix('outer'), new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.remove_from_relation.title'),
+	          onClick: function onClick(context) {
+	            context.perform(actionDeleteMember(this.issue.entityIds[0], this.issue.data.member.index), _t('operations.delete_member.annotation', {
+	              n: 1
+	            }));
+	          }
+	        })];
 	      }
+	    });
+
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.missing_role.multipolygon.reference'));
 	    }
 	  }
-	}
-	function locArray(loc) {
-	  if (Array.isArray(loc)) {
-	    return loc;
-	  } else if (loc.coordinates) {
-	    return loc.coordinates;
-	  }
-	  return loc.geometry.coordinates;
-	}
-	function smallestFeature(loc) {
-	  var query = locArray(loc);
-	  var featureProperties = whichPolygonGetter(query);
-	  if (!featureProperties) { return null; }
-	  return featuresByCode[featureProperties.id];
-	}
-	function countryFeature(loc) {
-	  var feature = smallestFeature(loc);
-	  if (!feature) { return null; }
-	  var countryCode = feature.properties.country || feature.properties.iso1A2;
-	  return featuresByCode[countryCode];
-	}
-	function featureForLoc(loc, opts) {
-	  if (opts && opts.level && opts.level !== 'country') {
-	    var features = featuresContaining(loc);
-	    var targetLevel = opts.level;
-	    var targetLevelIndex = levels.indexOf(targetLevel);
-	    if (targetLevelIndex === -1) { return null; }
-	    for (var i in features) {
-	      var feature = features[i];
-	      if (
-	        feature.properties.level === targetLevel ||
-	        levels.indexOf(feature.properties.level) > targetLevelIndex
-	      ) {
-	        return feature;
+
+	  function makeAddRoleFix(role) {
+	    return new validationIssueFix({
+	      title: _t.html('issues.fix.set_as_' + role + '.title'),
+	      onClick: function onClick(context) {
+	        var oldMember = this.issue.data.member;
+	        var member = {
+	          id: this.issue.entityIds[1],
+	          type: oldMember.type,
+	          role: role
+	        };
+	        context.perform(actionChangeMember(this.issue.entityIds[0], member, oldMember.index), _t('operations.change_role.annotation', {
+	          n: 1
+	        }));
 	      }
-	    }
-	    return null;
-	  }
-	  return countryFeature(loc);
-	}
-	function featureForID(id) {
-	  var stringID;
-	  if (typeof id === 'number') {
-	    stringID = id.toString();
-	    if (stringID.length === 1) {
-	      stringID = '00' + stringID;
-	    } else if (stringID.length === 2) {
-	      stringID = '0' + stringID;
-	    }
-	  } else {
-	    stringID = id.replace(idFilterRegex, '').toUpperCase();
-	  }
-	  return featuresByCode[stringID] || null;
-	}
-	function smallestOrMatchingFeature(query) {
-	  if (typeof query === 'object') {
-	    return smallestFeature(query);
-	  }
-	  return featureForID(query);
-	}
-	function feature(query, opts) {
-	  if (typeof query === 'object') {
-	    return featureForLoc(query, opts);
+	    });
 	  }
-	  return featureForID(query);
-	}
-	function iso1A2Code(query, opts) {
-	  var match = feature(query, opts);
-	  if (!match) { return null; }
-	  return match.properties.iso1A2 || null;
+
+	  validation.type = type;
+	  return validation;
 	}
-	function featuresContaining(query, strict) {
-	  var feature = smallestOrMatchingFeature(query);
-	  if (!feature) { return []; }
-	  var features = [];
-	  if (!strict || typeof query === 'object') {
-	    features.push(feature);
+
+	function validationMissingTag(context) {
+	  var type = 'missing_tag';
+
+	  function hasDescriptiveTags(entity, graph) {
+	    var onlyAttributeKeys = ['description', 'name', 'note', 'start_date'];
+	    var entityDescriptiveKeys = Object.keys(entity.tags).filter(function (k) {
+	      if (k === 'area' || !osmIsInterestingTag(k)) return false;
+	      return !onlyAttributeKeys.some(function (attributeKey) {
+	        return k === attributeKey || k.indexOf(attributeKey + ':') === 0;
+	      });
+	    });
+
+	    if (entity.type === 'relation' && entityDescriptiveKeys.length === 1 && entity.tags.type === 'multipolygon') {
+	      // this relation's only interesting tag just says its a multipolygon,
+	      // which is not descriptive enough
+	      // It's okay for a simple multipolygon to have no descriptive tags
+	      // if its outer way has them (old model, see `outdated_tags.js`)
+	      return osmOldMultipolygonOuterMemberOfRelation(entity, graph);
+	    }
+
+	    return entityDescriptiveKeys.length > 0;
 	  }
-	  var properties = feature.properties;
-	  for (var i in properties.groups) {
-	    var groupID = properties.groups[i];
-	    features.push(featuresByCode[groupID]);
+
+	  function isUnknownRoad(entity) {
+	    return entity.type === 'way' && entity.tags.highway === 'road';
 	  }
-	  return features;
-	}
-	function roadSpeedUnit(query) {
-	  var feature = smallestOrMatchingFeature(query);
-	  return (feature && feature.properties.roadSpeedUnit) || null;
-	}
 
-	var _dataDeprecated;
-	var _nsi;
+	  function isUntypedRelation(entity) {
+	    return entity.type === 'relation' && !entity.tags.type;
+	  }
+
+	  var validation = function checkMissingTag(entity, graph) {
+	    var subtype;
+	    var osm = context.connection();
+	    var isUnloadedNode = entity.type === 'node' && osm && !osm.isDataLoaded(entity.loc); // we can't know if the node is a vertex if the tile is undownloaded
+
+	    if (!isUnloadedNode && // allow untagged nodes that are part of ways
+	    entity.geometry(graph) !== 'vertex' && // allow untagged entities that are part of relations
+	    !entity.hasParentRelations(graph)) {
+	      if (Object.keys(entity.tags).length === 0) {
+	        subtype = 'any';
+	      } else if (!hasDescriptiveTags(entity, graph)) {
+	        subtype = 'descriptive';
+	      } else if (isUntypedRelation(entity)) {
+	        subtype = 'relation_type';
+	      }
+	    } // flag an unknown road even if it's a member of a relation
+
+
+	    if (!subtype && isUnknownRoad(entity)) {
+	      subtype = 'highway_classification';
+	    }
+
+	    if (!subtype) return [];
+	    var messageID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag.' + subtype;
+	    var referenceID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag'; // can always delete if the user created it in the first place..
+
+	    var canDelete = entity.version === undefined || entity.v !== undefined;
+	    var severity = canDelete && subtype !== 'highway_classification' ? 'error' : 'warning';
+	    return [new validationIssue({
+	      type: type,
+	      subtype: subtype,
+	      severity: severity,
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        return entity ? _t.html('issues.' + messageID + '.message', {
+	          feature: utilDisplayLabel(entity, context.graph())
+	        }) : '';
+	      },
+	      reference: showReference,
+	      entityIds: [entity.id],
+	      dynamicFixes: function dynamicFixes(context) {
+	        var fixes = [];
+	        var selectFixType = subtype === 'highway_classification' ? 'select_road_type' : 'select_preset';
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-icon-search',
+	          title: _t.html('issues.fix.' + selectFixType + '.title'),
+	          onClick: function onClick(context) {
+	            context.ui().sidebar.showPresetList();
+	          }
+	        }));
+	        var deleteOnClick;
+	        var id = this.entityIds[0];
+	        var operation = operationDelete(context, [id]);
+	        var disabledReasonID = operation.disabled();
+
+	        if (!disabledReasonID) {
+	          deleteOnClick = function deleteOnClick(context) {
+	            var id = this.issue.entityIds[0];
+	            var operation = operationDelete(context, [id]);
+
+	            if (!operation.disabled()) {
+	              operation();
+	            }
+	          };
+	        }
+
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.delete_feature.title'),
+	          disabledReason: disabledReasonID ? _t('operations.delete.' + disabledReasonID + '.single') : undefined,
+	          onClick: deleteOnClick
+	        }));
+	        return fixes;
+	      }
+	    })];
+
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.' + referenceID + '.reference'));
+	    }
+	  };
+
+	  validation.type = type;
+	  return validation;
+	}
 
 	function validationOutdatedTags() {
 	  var type = 'outdated_tags';
-	  var nsiKeys = ['amenity', 'shop', 'tourism', 'leisure', 'office'];
-
-	  // A concern here in switching to async data means that `_dataDeprecated`
-	  // and `_nsi` will not be available at first, so the data on early tiles
-	  // may not have tags validated fully.
-
-	  // initialize deprecated tags array
-	  _mainFileFetcher.get('deprecated')
-	    .then(function (d) { return _dataDeprecated = d; })
-	    .catch(function () { /* ignore */ });
-
-	  _mainFileFetcher.get('nsi_brands')
-	    .then(function (d) {
-	      _nsi = {
-	        brands: d.brands,
-	        matcher: matcher$1(),
-	        wikidata: {},
-	        wikipedia: {}
-	      };
-
-	      // initialize name-suggestion-index matcher
-	      _nsi.matcher.buildMatchIndex(d.brands);
+	  var _waitingForDeprecated = true;
 
-	      // index all known wikipedia and wikidata tags
-	      Object.keys(d.brands).forEach(function (kvnd) {
-	        var brand = d.brands[kvnd];
-	        var wd = brand.tags['brand:wikidata'];
-	        var wp = brand.tags['brand:wikipedia'];
-	        if (wd) { _nsi.wikidata[wd] = kvnd; }
-	        if (wp) { _nsi.wikipedia[wp] = kvnd; }
-	      });
+	  var _dataDeprecated; // fetch deprecated tags
 
-	      return _nsi;
-	    })
-	    .catch(function () { /* ignore */ });
 
+	  _mainFileFetcher.get('deprecated').then(function (d) {
+	    return _dataDeprecated = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  })["finally"](function () {
+	    return _waitingForDeprecated = false;
+	  });
 
 	  function oldTagIssues(entity, graph) {
-	    var oldTags = Object.assign({}, entity.tags);  // shallow copy
+	    var oldTags = Object.assign({}, entity.tags); // shallow copy
+
 	    var preset = _mainPresetIndex.match(entity, graph);
 	    var subtype = 'deprecated_tags';
-	    if (!preset) { return []; }
+	    if (!preset) return [];
+	    if (!entity.hasInterestingTags()) return []; // Upgrade preset, if a replacement is available..
 
-	    // upgrade preset..
 	    if (preset.replacement) {
 	      var newPreset = _mainPresetIndex.item(preset.replacement);
-	      graph = actionChangePreset(entity.id, preset, newPreset, true /* skip field defaults */)(graph);
+	      graph = actionChangePreset(entity.id, preset, newPreset, true
+	      /* skip field defaults */
+	      )(graph);
 	      entity = graph.entity(entity.id);
 	      preset = newPreset;
-	    }
+	    } // Upgrade deprecated tags..
+
 
-	    // upgrade tags..
 	    if (_dataDeprecated) {
 	      var deprecatedTags = entity.deprecatedTags(_dataDeprecated);
+
 	      if (deprecatedTags.length) {
 	        deprecatedTags.forEach(function (tag) {
 	          graph = actionUpgradeTags(entity.id, tag.old, tag.replace)(graph);
 	        });
 	        entity = graph.entity(entity.id);
 	      }
-	    }
+	    } // Add missing addTags from the detected preset
+
+
+	    var newTags = Object.assign({}, entity.tags); // shallow copy
 
-	    // add missing addTags..
-	    var newTags = Object.assign({}, entity.tags);  // shallow copy
 	    if (preset.tags !== preset.addTags) {
 	      Object.keys(preset.addTags).forEach(function (k) {
 	        if (!newTags[k]) {
@@ -60765,110 +77150,85 @@
 	          }
 	        }
 	      });
-	    }
-
-	    if (_nsi) {
-	      // Do `wikidata` or `wikipedia` identify this entity as a brand?  #6416
-	      // If so, these tags can be swapped to `brand:wikidata`/`brand:wikipedia`
-	      var isBrand;
-	      if (newTags.wikidata) {                 // try matching `wikidata`
-	        isBrand = _nsi.wikidata[newTags.wikidata];
-	      }
-	      if (!isBrand && newTags.wikipedia) {    // fallback to `wikipedia`
-	        isBrand = _nsi.wikipedia[newTags.wikipedia];
-	      }
-	      if (isBrand && !newTags.office) {       // but avoid doing this for corporate offices
-	        if (newTags.wikidata) {
-	          newTags['brand:wikidata'] = newTags.wikidata;
-	          delete newTags.wikidata;
-	        }
-	        if (newTags.wikipedia) {
-	          newTags['brand:wikipedia'] = newTags.wikipedia;
-	          delete newTags.wikipedia;
-	        }
-	        // I considered setting `name` and other tags here, but they aren't unique per wikidata
-	        // (Q2759586 -> in USA "Papa John's", in Russia "Папа Джонс")
-	        // So users will really need to use a preset or assign `name` themselves.
-	      }
-
-	      // try key/value|name match against name-suggestion-index
-	      if (newTags.name) {
-	        for (var i = 0; i < nsiKeys.length; i++) {
-	          var k = nsiKeys[i];
-	          if (!newTags[k]) { continue; }
+	    } // Attempt to match a canonical record in the name-suggestion-index.
 
-	          var center = entity.extent(graph).center();
-	          var countryCode = iso1A2Code(center);
-	          var match = _nsi.matcher.matchKVN(k, newTags[k], newTags.name, countryCode && countryCode.toLowerCase());
-	          if (!match) { continue; }
 
-	          // for now skip ambiguous matches (like Target~(USA) vs Target~(Australia))
-	          if (match.d) { continue; }
+	    var nsi = services.nsi;
+	    var waitingForNsi = false;
+	    var nsiResult;
 
-	          var brand = _nsi.brands[match.kvnd];
-	          if (brand && brand.tags['brand:wikidata'] &&
-	            brand.tags['brand:wikidata'] !== entity.tags['not:brand:wikidata']) {
-	            subtype = 'noncanonical_brand';
+	    if (nsi) {
+	      waitingForNsi = nsi.status() === 'loading';
 
-	            var keepTags = ['takeaway'].reduce(function (acc, k) {
-	              if (newTags[k]) {
-	                acc[k] = newTags[k];
-	              }
-	              return acc;
-	            }, {});
+	      if (!waitingForNsi) {
+	        var loc = entity.extent(graph).center();
+	        nsiResult = nsi.upgradeTags(newTags, loc);
 
-	            nsiKeys.forEach(function (k) { return delete newTags[k]; });
-	            Object.assign(newTags, brand.tags, keepTags);
-	            break;
-	          }
+	        if (nsiResult) {
+	          newTags = nsiResult.newTags;
+	          subtype = 'noncanonical_brand';
 	        }
 	      }
 	    }
 
-	    // determine diff
-	    var tagDiff = utilTagDiff(oldTags, newTags);
-	    if (!tagDiff.length) { return []; }
-
-	    var isOnlyAddingTags = tagDiff.every(function (d) { return d.type === '+'; });
+	    var issues = [];
+	    issues.provisional = _waitingForDeprecated || waitingForNsi; // determine diff
 
+	    var tagDiff = utilTagDiff(oldTags, newTags);
+	    if (!tagDiff.length) return issues;
+	    var isOnlyAddingTags = tagDiff.every(function (d) {
+	      return d.type === '+';
+	    });
 	    var prefix = '';
-	    if (subtype === 'noncanonical_brand') {
+
+	    if (nsiResult) {
 	      prefix = 'noncanonical_brand.';
 	    } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
 	      subtype = 'incomplete_tags';
 	      prefix = 'incomplete.';
-	    }
+	    } // don't allow autofixing brand tags
 
-	    // don't allow autofixing brand tags
-	    var autoArgs = subtype !== 'noncanonical_brand' ? [doUpgrade, _t('issues.fix.upgrade_tags.annotation')] : null;
 
-	    return [new validationIssue({
+	    var autoArgs = subtype !== 'noncanonical_brand' ? [doUpgrade, _t('issues.fix.upgrade_tags.annotation')] : null;
+	    issues.push(new validationIssue({
 	      type: type,
 	      subtype: subtype,
 	      severity: 'warning',
 	      message: showMessage,
 	      reference: showReference,
 	      entityIds: [entity.id],
-	      hash: JSON.stringify(tagDiff),
-	      dynamicFixes: function () {
-	        return [
-	          new validationIssueFix({
-	            autoArgs: autoArgs,
-	            title: _t('issues.fix.upgrade_tags.title'),
-	            onClick: function (context) {
-	              context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
+	      hash: utilHashcode(JSON.stringify(tagDiff)),
+	      dynamicFixes: function dynamicFixes() {
+	        var fixes = [new validationIssueFix({
+	          autoArgs: autoArgs,
+	          title: _t.html('issues.fix.upgrade_tags.title'),
+	          onClick: function onClick(context) {
+	            context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
+	          }
+	        })];
+	        var item = nsiResult && nsiResult.matched;
+
+	        if (item) {
+	          fixes.push(new validationIssueFix({
+	            title: _t.html('issues.fix.tag_as_not.title', {
+	              name: item.displayName
+	            }),
+	            onClick: function onClick(context) {
+	              context.perform(addNotTag, _t('issues.fix.tag_as_not.annotation'));
 	            }
-	          })
-	        ];
-	      }
-	    })];
+	          }));
+	        }
 
+	        return fixes;
+	      }
+	    }));
+	    return issues;
 
 	    function doUpgrade(graph) {
 	      var currEntity = graph.hasEntity(entity.id);
-	      if (!currEntity) { return graph; }
+	      if (!currEntity) return graph;
+	      var newTags = Object.assign({}, currEntity.tags); // shallow copy
 
-	      var newTags = Object.assign({}, currEntity.tags);  // shallow copy
 	      tagDiff.forEach(function (diff) {
 	        if (diff.type === '-') {
 	          delete newTags[diff.key];
@@ -60876,57 +77236,66 @@
 	          newTags[diff.key] = diff.newVal;
 	        }
 	      });
-
 	      return actionChangeTags(currEntity.id, newTags)(graph);
 	    }
 
+	    function addNotTag(graph) {
+	      var currEntity = graph.hasEntity(entity.id);
+	      if (!currEntity) return graph;
+	      var item = nsiResult && nsiResult.matched;
+	      if (!item) return graph;
+	      var newTags = Object.assign({}, currEntity.tags); // shallow copy
+
+	      var wd = item.mainTag; // e.g. `brand:wikidata`
+
+	      var notwd = "not:".concat(wd); // e.g. `not:brand:wikidata`
+
+	      var qid = item.tags[wd];
+	      newTags[notwd] = qid;
+
+	      if (newTags[wd] === qid) {
+	        // if `brand:wikidata` was set to that qid
+	        var wp = item.mainTag.replace('wikidata', 'wikipedia');
+	        delete newTags[wd]; // remove `brand:wikidata`
+
+	        delete newTags[wp]; // remove `brand:wikipedia`
+	      }
+
+	      return actionChangeTags(currEntity.id, newTags)(graph);
+	    }
 
 	    function showMessage(context) {
 	      var currEntity = context.hasEntity(entity.id);
-	      if (!currEntity) { return ''; }
+	      if (!currEntity) return '';
+	      var messageID = "issues.outdated_tags.".concat(prefix, "message");
 
-	      var messageID = "issues.outdated_tags." + prefix + "message";
 	      if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
 	        messageID += '_incomplete';
 	      }
-	      return _t(messageID, { feature: utilDisplayLabel(currEntity, context.graph()) });
-	    }
 
+	      return _t.html(messageID, {
+	        feature: utilDisplayLabel(currEntity, context.graph(), true
+	        /* verbose */
+	        )
+	      });
+	    }
 
 	    function showReference(selection) {
-	      var enter = selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter();
-
-	      enter
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t(("issues.outdated_tags." + prefix + "reference")));
-
-	      enter
-	        .append('strong')
-	        .text(_t('issues.suggested'));
-
-	      enter
-	        .append('table')
-	        .attr('class', 'tagDiff-table')
-	        .selectAll('.tagDiff-row')
-	        .data(tagDiff)
-	        .enter()
-	        .append('tr')
-	        .attr('class', 'tagDiff-row')
-	        .append('td')
-	        .attr('class', function (d) {
-	          var klass = d.type === '+' ? 'add' : 'remove';
-	          return ("tagDiff-cell tagDiff-cell-" + klass);
-	        })
-	        .text(function (d) { return d.display; });
+	      var enter = selection.selectAll('.issue-reference').data([0]).enter();
+	      enter.append('div').attr('class', 'issue-reference').call(_t.append("issues.outdated_tags.".concat(prefix, "reference")));
+	      enter.append('strong').call(_t.append('issues.suggested'));
+	      enter.append('table').attr('class', 'tagDiff-table').selectAll('.tagDiff-row').data(tagDiff).enter().append('tr').attr('class', 'tagDiff-row').append('td').attr('class', function (d) {
+	        var klass = d.type === '+' ? 'add' : 'remove';
+	        return "tagDiff-cell tagDiff-cell-".concat(klass);
+	      }).html(function (d) {
+	        return d.display;
+	      });
 	    }
 	  }
 
-
 	  function oldMultipolygonIssues(entity, graph) {
 	    var multipolygon, outerWay;
+
 	    if (entity.type === 'relation') {
 	      outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
 	      multipolygon = entity;
@@ -60937,8 +77306,7 @@
 	      return [];
 	    }
 
-	    if (!multipolygon || !outerWay) { return []; }
-
+	    if (!multipolygon || !outerWay) return [];
 	    return [new validationIssue({
 	      type: type,
 	      subtype: 'old_multipolygon',
@@ -60946,247 +77314,196 @@
 	      message: showMessage,
 	      reference: showReference,
 	      entityIds: [outerWay.id, multipolygon.id],
-	      dynamicFixes: function () {
-	        return [
-	          new validationIssueFix({
-	            autoArgs: [doUpgrade, _t('issues.fix.move_tags.annotation')],
-	            title: _t('issues.fix.move_tags.title'),
-	            onClick: function (context) {
-	              context.perform(doUpgrade, _t('issues.fix.move_tags.annotation'));
-	            }
-	          })
-	        ];
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          autoArgs: [doUpgrade, _t('issues.fix.move_tags.annotation')],
+	          title: _t.html('issues.fix.move_tags.title'),
+	          onClick: function onClick(context) {
+	            context.perform(doUpgrade, _t('issues.fix.move_tags.annotation'));
+	          }
+	        })];
 	      }
 	    })];
 
-
 	    function doUpgrade(graph) {
 	      var currMultipolygon = graph.hasEntity(multipolygon.id);
 	      var currOuterWay = graph.hasEntity(outerWay.id);
-	      if (!currMultipolygon || !currOuterWay) { return graph; }
-
+	      if (!currMultipolygon || !currOuterWay) return graph;
 	      currMultipolygon = currMultipolygon.mergeTags(currOuterWay.tags);
 	      graph = graph.replace(currMultipolygon);
 	      return actionChangeTags(currOuterWay.id, {})(graph);
 	    }
 
-
 	    function showMessage(context) {
 	      var currMultipolygon = context.hasEntity(multipolygon.id);
-	      if (!currMultipolygon) { return ''; }
-
-	      return _t('issues.old_multipolygon.message',
-	          { multipolygon: utilDisplayLabel(currMultipolygon, context.graph()) }
-	      );
+	      if (!currMultipolygon) return '';
+	      return _t.html('issues.old_multipolygon.message', {
+	        multipolygon: utilDisplayLabel(currMultipolygon, context.graph(), true
+	        /* verbose */
+	        )
+	      });
 	    }
 
-
 	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.old_multipolygon.reference'));
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.old_multipolygon.reference'));
 	    }
 	  }
 
-
 	  var validation = function checkOutdatedTags(entity, graph) {
 	    var issues = oldMultipolygonIssues(entity, graph);
-	    if (!issues.length) { issues = oldTagIssues(entity, graph); }
+	    if (!issues.length) issues = oldTagIssues(entity, graph);
 	    return issues;
 	  };
 
-
 	  validation.type = type;
-
 	  return validation;
 	}
 
 	function validationPrivateData() {
-	    var type = 'private_data';
-
-	    // assume that some buildings are private
-	    var privateBuildingValues = {
-	        detached: true,
-	        farm: true,
-	        house: true,
-	        houseboat: true,
-	        residential: true,
-	        semidetached_house: true,
-	        static_caravan: true
-	    };
-
-	    // but they might be public if they have one of these other tags
-	    var publicKeys = {
-	        amenity: true,
-	        craft: true,
-	        historic: true,
-	        leisure: true,
-	        office: true,
-	        shop: true,
-	        tourism: true
-	    };
-
-	    // these tags may contain personally identifying info
-	    var personalTags = {
-	        'contact:email': true,
-	        'contact:fax': true,
-	        'contact:phone': true,
-	        email: true,
-	        fax: true,
-	        phone: true
-	    };
-
-
-	    var validation = function checkPrivateData(entity) {
-	        var tags = entity.tags;
-	        if (!tags.building || !privateBuildingValues[tags.building]) { return []; }
-
-	        var keepTags = {};
-	        for (var k in tags) {
-	            if (publicKeys[k]) { return []; }  // probably a public feature
-	            if (!personalTags[k]) {
-	                keepTags[k] = tags[k];
-	            }
-	        }
+	  var type = 'private_data'; // assume that some buildings are private
+
+	  var privateBuildingValues = {
+	    detached: true,
+	    farm: true,
+	    house: true,
+	    houseboat: true,
+	    residential: true,
+	    semidetached_house: true,
+	    static_caravan: true
+	  }; // but they might be public if they have one of these other tags
+
+	  var publicKeys = {
+	    amenity: true,
+	    craft: true,
+	    historic: true,
+	    leisure: true,
+	    office: true,
+	    shop: true,
+	    tourism: true
+	  }; // these tags may contain personally identifying info
+
+	  var personalTags = {
+	    'contact:email': true,
+	    'contact:fax': true,
+	    'contact:phone': true,
+	    email: true,
+	    fax: true,
+	    phone: true
+	  };
+
+	  var validation = function checkPrivateData(entity) {
+	    var tags = entity.tags;
+	    if (!tags.building || !privateBuildingValues[tags.building]) return [];
+	    var keepTags = {};
 
-	        var tagDiff = utilTagDiff(tags, keepTags);
-	        if (!tagDiff.length) { return []; }
+	    for (var k in tags) {
+	      if (publicKeys[k]) return []; // probably a public feature
 
-	        var fixID = tagDiff.length === 1 ? 'remove_tag' : 'remove_tags';
+	      if (!personalTags[k]) {
+	        keepTags[k] = tags[k];
+	      }
+	    }
 
-	        return [new validationIssue({
-	            type: type,
-	            severity: 'warning',
-	            message: showMessage,
-	            reference: showReference,
-	            entityIds: [entity.id],
-	            dynamicFixes: function() {
-	                return [
-	                    new validationIssueFix({
-	                        icon: 'iD-operation-delete',
-	                        title: _t('issues.fix.' + fixID + '.title'),
-	                        onClick: function(context) {
-	                            context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
-	                        }
-	                    })
-	                ];
-	            }
+	    var tagDiff = utilTagDiff(tags, keepTags);
+	    if (!tagDiff.length) return [];
+	    var fixID = tagDiff.length === 1 ? 'remove_tag' : 'remove_tags';
+	    return [new validationIssue({
+	      type: type,
+	      severity: 'warning',
+	      message: showMessage,
+	      reference: showReference,
+	      entityIds: [entity.id],
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.' + fixID + '.title'),
+	          onClick: function onClick(context) {
+	            context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
+	          }
 	        })];
+	      }
+	    })];
 
+	    function doUpgrade(graph) {
+	      var currEntity = graph.hasEntity(entity.id);
+	      if (!currEntity) return graph;
+	      var newTags = Object.assign({}, currEntity.tags); // shallow copy
 
-	        function doUpgrade(graph) {
-	            var currEntity = graph.hasEntity(entity.id);
-	            if (!currEntity) { return graph; }
-
-	            var newTags = Object.assign({}, currEntity.tags);  // shallow copy
-	            tagDiff.forEach(function(diff) {
-	                if (diff.type === '-') {
-	                    delete newTags[diff.key];
-	                } else if (diff.type === '+') {
-	                    newTags[diff.key] = diff.newVal;
-	                }
-	            });
-
-	            return actionChangeTags(currEntity.id, newTags)(graph);
-	        }
-
-
-	        function showMessage(context) {
-	            var currEntity = context.hasEntity(this.entityIds[0]);
-	            if (!currEntity) { return ''; }
-
-	            return _t('issues.private_data.contact.message',
-	                { feature: utilDisplayLabel(currEntity, context.graph()) }
-	            );
-	        }
-
-
-	        function showReference(selection) {
-	            var enter = selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter();
-
-	            enter
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.private_data.reference'));
-
-	            enter
-	                .append('strong')
-	                .text(_t('issues.suggested'));
-
-	            enter
-	                .append('table')
-	                .attr('class', 'tagDiff-table')
-	                .selectAll('.tagDiff-row')
-	                .data(tagDiff)
-	                .enter()
-	                .append('tr')
-	                .attr('class', 'tagDiff-row')
-	                .append('td')
-	                .attr('class', function(d) {
-	                    var klass = d.type === '+' ? 'add' : 'remove';
-	                    return 'tagDiff-cell tagDiff-cell-' + klass;
-	                })
-	                .text(function(d) { return d.display; });
+	      tagDiff.forEach(function (diff) {
+	        if (diff.type === '-') {
+	          delete newTags[diff.key];
+	        } else if (diff.type === '+') {
+	          newTags[diff.key] = diff.newVal;
 	        }
-	    };
+	      });
+	      return actionChangeTags(currEntity.id, newTags)(graph);
+	    }
 
+	    function showMessage(context) {
+	      var currEntity = context.hasEntity(this.entityIds[0]);
+	      if (!currEntity) return '';
+	      return _t.html('issues.private_data.contact.message', {
+	        feature: utilDisplayLabel(currEntity, context.graph())
+	      });
+	    }
 
-	    validation.type = type;
+	    function showReference(selection) {
+	      var enter = selection.selectAll('.issue-reference').data([0]).enter();
+	      enter.append('div').attr('class', 'issue-reference').call(_t.append('issues.private_data.reference'));
+	      enter.append('strong').call(_t.append('issues.suggested'));
+	      enter.append('table').attr('class', 'tagDiff-table').selectAll('.tagDiff-row').data(tagDiff).enter().append('tr').attr('class', 'tagDiff-row').append('td').attr('class', function (d) {
+	        var klass = d.type === '+' ? 'add' : 'remove';
+	        return 'tagDiff-cell tagDiff-cell-' + klass;
+	      }).html(function (d) {
+	        return d.display;
+	      });
+	    }
+	  };
 
-	    return validation;
+	  validation.type = type;
+	  return validation;
 	}
 
-	var _discardNameRegexes = [];
-
 	function validationSuspiciousName() {
 	  var type = 'suspicious_name';
-	  var keysToTestForGenericValues = [
-	    'aerialway', 'aeroway', 'amenity', 'building', 'craft', 'highway',
-	    'leisure', 'railway', 'man_made', 'office', 'shop', 'tourism', 'waterway'
-	  ];
+	  var keysToTestForGenericValues = ['aerialway', 'aeroway', 'amenity', 'building', 'craft', 'highway', 'leisure', 'railway', 'man_made', 'office', 'shop', 'tourism', 'waterway'];
+	  var _waitingForNsi = false; // Attempt to match a generic record in the name-suggestion-index.
 
-	  // A concern here in switching to async data means that `_nsiFilters` will not
-	  // be available at first, so the data on early tiles may not have tags validated fully.
+	  function isGenericMatchInNsi(tags) {
+	    var nsi = services.nsi;
 
-	  _mainFileFetcher.get('nsi_filters')
-	    .then(function (filters) {
-	      // known list of generic names (e.g. "bar")
-	      _discardNameRegexes = filters.discardNames
-	        .map(function (discardName) { return new RegExp(discardName, 'i'); });
-	    })
-	    .catch(function () { /* ignore */ });
+	    if (nsi) {
+	      _waitingForNsi = nsi.status() === 'loading';
+
+	      if (!_waitingForNsi) {
+	        return nsi.isGenericName(tags);
+	      }
+	    }
 
+	    return false;
+	  } // Test if the name is just the key or tag value (e.g. "park")
 
-	  function isDiscardedSuggestionName(lowercaseName) {
-	    return _discardNameRegexes.some(function (regex) { return regex.test(lowercaseName); });
-	  }
 
-	  // test if the name is just the key or tag value (e.g. "park")
 	  function nameMatchesRawTag(lowercaseName, tags) {
 	    for (var i = 0; i < keysToTestForGenericValues.length; i++) {
 	      var key = keysToTestForGenericValues[i];
 	      var val = tags[key];
+
 	      if (val) {
 	        val = val.toLowerCase();
-	        if (key === lowercaseName ||
-	          val === lowercaseName ||
-	          key.replace(/\_/g, ' ') === lowercaseName ||
-	          val.replace(/\_/g, ' ') === lowercaseName) {
+
+	        if (key === lowercaseName || val === lowercaseName || key.replace(/\_/g, ' ') === lowercaseName || val.replace(/\_/g, ' ') === lowercaseName) {
 	          return true;
 	        }
 	      }
 	    }
+
 	    return false;
 	  }
 
 	  function isGenericName(name, tags) {
 	    name = name.toLowerCase();
-	    return nameMatchesRawTag(name, tags) || isDiscardedSuggestionName(name);
+	    return nameMatchesRawTag(name, tags) || isGenericMatchInNsi(tags);
 	  }
 
 	  function makeGenericNameIssue(entityId, nameKey, genericName, langCode) {
@@ -61194,44 +77511,38 @@
 	      type: type,
 	      subtype: 'generic_name',
 	      severity: 'warning',
-	      message: function(context) {
+	      message: function message(context) {
 	        var entity = context.hasEntity(this.entityIds[0]);
-	        if (!entity) { return ''; }
+	        if (!entity) return '';
 	        var preset = _mainPresetIndex.match(entity, context.graph());
 	        var langName = langCode && _mainLocalizer.languageName(langCode);
-	        return _t('issues.generic_name.message' + (langName ? '_language' : ''),
-	          { feature: preset.name(), name: genericName, language: langName }
-	        );
+	        return _t.html('issues.generic_name.message' + (langName ? '_language' : ''), {
+	          feature: preset.name(),
+	          name: genericName,
+	          language: langName
+	        });
 	      },
 	      reference: showReference,
 	      entityIds: [entityId],
-	      hash: nameKey + '=' + genericName,
-	      dynamicFixes: function() {
-	        return [
-	          new validationIssueFix({
-	            icon: 'iD-operation-delete',
-	            title: _t('issues.fix.remove_the_name.title'),
-	            onClick: function(context) {
-	              var entityId = this.issue.entityIds[0];
-	              var entity = context.entity(entityId);
-	              var tags = Object.assign({}, entity.tags);   // shallow copy
-	              delete tags[nameKey];
-	              context.perform(
-	                actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation')
-	              );
-	            }
-	          })
-	        ];
+	      hash: "".concat(nameKey, "=").concat(genericName),
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.remove_the_name.title'),
+	          onClick: function onClick(context) {
+	            var entityId = this.issue.entityIds[0];
+	            var entity = context.entity(entityId);
+	            var tags = Object.assign({}, entity.tags); // shallow copy
+
+	            delete tags[nameKey];
+	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation'));
+	          }
+	        })];
 	      }
 	    });
 
 	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.generic_name.reference'));
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.generic_name.reference'));
 	    }
 	  }
 
@@ -61240,71 +77551,69 @@
 	      type: type,
 	      subtype: 'not_name',
 	      severity: 'warning',
-	      message: function(context) {
+	      message: function message(context) {
 	        var entity = context.hasEntity(this.entityIds[0]);
-	        if (!entity) { return ''; }
+	        if (!entity) return '';
 	        var preset = _mainPresetIndex.match(entity, context.graph());
 	        var langName = langCode && _mainLocalizer.languageName(langCode);
-	        return _t('issues.incorrect_name.message' + (langName ? '_language' : ''),
-	          { feature: preset.name(), name: incorrectName, language: langName }
-	        );
+	        return _t.html('issues.incorrect_name.message' + (langName ? '_language' : ''), {
+	          feature: preset.name(),
+	          name: incorrectName,
+	          language: langName
+	        });
 	      },
 	      reference: showReference,
 	      entityIds: [entityId],
-	      hash: nameKey + '=' + incorrectName,
-	      dynamicFixes: function() {
-	        return [
-	          new validationIssueFix({
-	            icon: 'iD-operation-delete',
-	            title: _t('issues.fix.remove_the_name.title'),
-	            onClick: function(context) {
-	              var entityId = this.issue.entityIds[0];
-	              var entity = context.entity(entityId);
-	              var tags = Object.assign({}, entity.tags);   // shallow copy
-	              delete tags[nameKey];
-	              context.perform(
-	                actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation')
-	              );
-	            }
-	          })
-	        ];
+	      hash: "".concat(nameKey, "=").concat(incorrectName),
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.remove_the_name.title'),
+	          onClick: function onClick(context) {
+	            var entityId = this.issue.entityIds[0];
+	            var entity = context.entity(entityId);
+	            var tags = Object.assign({}, entity.tags); // shallow copy
+
+	            delete tags[nameKey];
+	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation'));
+	          }
+	        })];
 	      }
 	    });
 
 	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.generic_name.reference'));
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.generic_name.reference'));
 	    }
 	  }
 
-
 	  var validation = function checkGenericName(entity) {
-	    // a generic name is okay if it's a known brand or entity
-	    if (entity.hasWikidata()) { return []; }
+	    var tags = entity.tags; // a generic name is allowed if it's a known brand or entity
 
+	    var hasWikidata = !!tags.wikidata || !!tags['brand:wikidata'] || !!tags['operator:wikidata'];
+	    if (hasWikidata) return [];
 	    var issues = [];
-	    var notNames = (entity.tags['not:name'] || '').split(';');
+	    var notNames = (tags['not:name'] || '').split(';');
 
-	    for (var key in entity.tags) {
+	    for (var key in tags) {
 	      var m = key.match(/^name(?:(?::)([a-zA-Z_-]+))?$/);
-	      if (!m) { continue; }
-
+	      if (!m) continue;
 	      var langCode = m.length >= 2 ? m[1] : null;
-	      var value = entity.tags[key];
+	      var value = tags[key];
+
 	      if (notNames.length) {
 	        for (var i in notNames) {
 	          var notName = notNames[i];
+
 	          if (notName && value === notName) {
 	            issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
 	            continue;
 	          }
 	        }
 	      }
-	      if (isGenericName(value, entity.tags)) {
+
+	      if (isGenericName(value, tags)) {
+	        issues.provisional = _waitingForNsi; // retry later if we are waiting on NSI to finish loading
+
 	        issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
 	      }
 	    }
@@ -61312,119 +77621,126 @@
 	    return issues;
 	  };
 
-
 	  validation.type = type;
-
 	  return validation;
 	}
 
 	function validationUnsquareWay(context) {
-	    var type = 'unsquare_way';
-	    var DEFAULT_DEG_THRESHOLD = 5;   // see also issues.js
+	  var type = 'unsquare_way';
+	  var DEFAULT_DEG_THRESHOLD = 5; // see also issues.js
+	  // use looser epsilon for detection to reduce warnings of buildings that are essentially square already
 
-	    // use looser epsilon for detection to reduce warnings of buildings that are essentially square already
-	    var epsilon = 0.05;
-	    var nodeThreshold = 10;
-
-	    function isBuilding(entity, graph) {
-	        if (entity.type !== 'way' || entity.geometry(graph) !== 'area') { return false; }
-	        return entity.tags.building && entity.tags.building !== 'no';
-	    }
+	  var epsilon = 0.05;
+	  var nodeThreshold = 10;
 
+	  function isBuilding(entity, graph) {
+	    if (entity.type !== 'way' || entity.geometry(graph) !== 'area') return false;
+	    return entity.tags.building && entity.tags.building !== 'no';
+	  }
 
-	    var validation = function checkUnsquareWay(entity, graph) {
+	  var validation = function checkUnsquareWay(entity, graph) {
+	    if (!isBuilding(entity, graph)) return []; // don't flag ways marked as physically unsquare
 
-	        if (!isBuilding(entity, graph)) { return []; }
+	    if (entity.tags.nonsquare === 'yes') return [];
+	    var isClosed = entity.isClosed();
+	    if (!isClosed) return []; // this building has bigger problems
+	    // don't flag ways with lots of nodes since they are likely detail-mapped
 
-	        // don't flag ways marked as physically unsquare
-	        if (entity.tags.nonsquare === 'yes') { return []; }
+	    var nodes = graph.childNodes(entity).slice(); // shallow copy
 
-	        var isClosed = entity.isClosed();
-	        if (!isClosed) { return []; }        // this building has bigger problems
+	    if (nodes.length > nodeThreshold + 1) return []; // +1 because closing node appears twice
+	    // ignore if not all nodes are fully downloaded
 
-	        // don't flag ways with lots of nodes since they are likely detail-mapped
-	        var nodes = graph.childNodes(entity).slice();    // shallow copy
-	        if (nodes.length > nodeThreshold + 1) { return []; }   // +1 because closing node appears twice
+	    var osm = services.osm;
+	    if (!osm || nodes.some(function (node) {
+	      return !osm.isDataLoaded(node.loc);
+	    })) return []; // don't flag connected ways to avoid unresolvable unsquare loops
 
-	        // ignore if not all nodes are fully downloaded
-	        var osm = services.osm;
-	        if (!osm || nodes.some(function(node) { return !osm.isDataLoaded(node.loc); })) { return []; }
-
-	        // don't flag connected ways to avoid unresolvable unsquare loops
-	        var hasConnectedSquarableWays = nodes.some(function(node) {
-	            return graph.parentWays(node).some(function(way) {
-	                if (way.id === entity.id) { return false; }
-	                if (isBuilding(way, graph)) { return true; }
-	                return graph.parentRelations(way).some(function(parentRelation) {
-	                    return parentRelation.isMultipolygon() &&
-	                        parentRelation.tags.building &&
-	                        parentRelation.tags.building !== 'no';
-	                });
-	            });
+	    var hasConnectedSquarableWays = nodes.some(function (node) {
+	      return graph.parentWays(node).some(function (way) {
+	        if (way.id === entity.id) return false;
+	        if (isBuilding(way, graph)) return true;
+	        return graph.parentRelations(way).some(function (parentRelation) {
+	          return parentRelation.isMultipolygon() && parentRelation.tags.building && parentRelation.tags.building !== 'no';
 	        });
-	        if (hasConnectedSquarableWays) { return []; }
-
+	      });
+	    });
+	    if (hasConnectedSquarableWays) return []; // user-configurable square threshold
 
-	        // user-configurable square threshold
-	        var storedDegreeThreshold = corePreferences('validate-square-degrees');
-	        var degreeThreshold = isNaN(storedDegreeThreshold) ? DEFAULT_DEG_THRESHOLD : parseFloat(storedDegreeThreshold);
+	    var storedDegreeThreshold = corePreferences('validate-square-degrees');
+	    var degreeThreshold = isNaN(storedDegreeThreshold) ? DEFAULT_DEG_THRESHOLD : parseFloat(storedDegreeThreshold);
+	    var points = nodes.map(function (node) {
+	      return context.projection(node.loc);
+	    });
+	    if (!geoOrthoCanOrthogonalize(points, isClosed, epsilon, degreeThreshold, true)) return [];
+	    var autoArgs; // don't allow autosquaring features linked to wikidata
 
-	        var points = nodes.map(function(node) { return context.projection(node.loc); });
-	        if (!geoOrthoCanOrthogonalize(points, isClosed, epsilon, degreeThreshold, true)) { return []; }
+	    if (!entity.tags.wikidata) {
+	      // use same degree threshold as for detection
+	      var autoAction = actionOrthogonalize(entity.id, context.projection, undefined, degreeThreshold);
+	      autoAction.transitionable = false; // when autofixing, do it instantly
 
-	        var autoArgs;
-	        // don't allow autosquaring features linked to wikidata
-	        if (!entity.tags.wikidata) {
-	            // use same degree threshold as for detection
-	            var autoAction = actionOrthogonalize(entity.id, context.projection, undefined, degreeThreshold);
-	            autoAction.transitionable = false;  // when autofixing, do it instantly
-	            autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature.single')];
-	        }
+	      autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature', {
+	        n: 1
+	      })];
+	    }
 
-	        return [new validationIssue({
-	            type: type,
-	            subtype: 'building',
-	            severity: 'warning',
-	            message: function(context) {
-	                var entity = context.hasEntity(this.entityIds[0]);
-	                return entity ? _t('issues.unsquare_way.message', { feature: utilDisplayLabel(entity, context.graph()) }) : '';
-	            },
-	            reference: showReference,
-	            entityIds: [entity.id],
-	            hash: JSON.stringify(autoArgs !== undefined) + degreeThreshold,
-	            dynamicFixes: function() {
-	                return [
-	                    new validationIssueFix({
-	                        icon: 'iD-operation-orthogonalize',
-	                        title: _t('issues.fix.square_feature.title'),
-	                        autoArgs: autoArgs,
-	                        onClick: function(context, completionHandler) {
-	                            var entityId = this.issue.entityIds[0];
-	                            // use same degree threshold as for detection
-	                            context.perform(
-	                                actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold),
-	                                _t('operations.orthogonalize.annotation.feature.single')
-	                            );
-	                            // run after the squaring transition (currently 150ms)
-	                            window.setTimeout(function() { completionHandler(); }, 175);
-	                        }
-	                    }) ];
+	    return [new validationIssue({
+	      type: type,
+	      subtype: 'building',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        return entity ? _t.html('issues.unsquare_way.message', {
+	          feature: utilDisplayLabel(entity, context.graph())
+	        }) : '';
+	      },
+	      reference: showReference,
+	      entityIds: [entity.id],
+	      hash: degreeThreshold,
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          icon: 'iD-operation-orthogonalize',
+	          title: _t.html('issues.fix.square_feature.title'),
+	          autoArgs: autoArgs,
+	          onClick: function onClick(context, completionHandler) {
+	            var entityId = this.issue.entityIds[0]; // use same degree threshold as for detection
+
+	            context.perform(actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold), _t('operations.orthogonalize.annotation.feature', {
+	              n: 1
+	            })); // run after the squaring transition (currently 150ms)
+
+	            window.setTimeout(function () {
+	              completionHandler();
+	            }, 175);
+	          }
+	        })
+	        /*
+	        new validationIssueFix({
+	            title: t.html('issues.fix.tag_as_unsquare.title'),
+	            onClick: function(context) {
+	                var entityId = this.issue.entityIds[0];
+	                var entity = context.entity(entityId);
+	                var tags = Object.assign({}, entity.tags);  // shallow copy
+	                tags.nonsquare = 'yes';
+	                context.perform(
+	                    actionChangeTags(entityId, tags),
+	                    t('issues.fix.tag_as_unsquare.annotation')
+	                );
 	            }
-	        })];
-
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.unsquare_way.buildings.reference'));
-	        }
-	    };
+	        })
+	        */
+	        ];
+	      }
+	    })];
 
-	    validation.type = type;
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.unsquare_way.buildings.reference'));
+	    }
+	  };
 
-	    return validation;
+	  validation.type = type;
+	  return validation;
 	}
 
 	var Validations = /*#__PURE__*/Object.freeze({
@@ -61448,1753 +77764,2080 @@
 	});
 
 	function coreValidator(context) {
-	    var dispatch$1 = dispatch('validated', 'focusedIssue');
-	    var validator = utilRebind({}, dispatch$1, 'on');
+	  var _this = this;
 
-	    var _rules = {};
-	    var _disabledRules = {};
+	  var dispatch = dispatch$8('validated', 'focusedIssue');
+	  var validator = utilRebind({}, dispatch, 'on');
+	  var _rules = {};
+	  var _disabledRules = {};
 
-	    var _ignoredIssueIDs = {};          // issue.id -> true
-	    var _baseCache = validationCache(); // issues before any user edits
-	    var _headCache = validationCache(); // issues after all user edits
-	    var _validatedGraph = null;
-	    var _deferred = new Set();
+	  var _ignoredIssueIDs = new Set();
 
-	    //
-	    // initialize the validator rulesets
-	    //
-	    validator.init = function() {
-	        Object.values(Validations).forEach(function(validation) {
-	            if (typeof validation !== 'function') { return; }
+	  var _resolvedIssueIDs = new Set();
 
-	            var fn = validation(context);
-	            var key = fn.type;
-	            _rules[key] = fn;
-	        });
+	  var _baseCache = validationCache('base'); // issues before any user edits
 
-	        var disabledRules = corePreferences('validate-disabledRules');
-	        if (disabledRules) {
-	            disabledRules.split(',')
-	                .forEach(function(key) { _disabledRules[key] = true; });
-	        }
-	    };
 
+	  var _headCache = validationCache('head'); // issues after all user edits
 
-	    //
-	    // clear caches, called whenever iD resets after a save
-	    //
-	    validator.reset = function() {
-	        Array.from(_deferred).forEach(function(handle) {
-	            window.cancelIdleCallback(handle);
-	            _deferred.delete(handle);
-	        });
 
-	        // clear caches
-	        _ignoredIssueIDs = {};
-	        _baseCache = validationCache();
-	        _headCache = validationCache();
-	        _validatedGraph = null;
-	    };
+	  var _completeDiff = {}; // complete diff base -> head of what the user changed
 
-	    validator.resetIgnoredIssues = function() {
-	        _ignoredIssueIDs = {};
-	        // reload UI
-	        dispatch$1.call('validated');
-	    };
+	  var _headIsCurrent = false;
 
+	  var _deferredRIC = new Set(); // Set( RequestIdleCallback handles )
 
-	    // must update issues when the user changes the unsquare thereshold
-	    validator.reloadUnsquareIssues = function() {
 
-	        reloadUnsquareIssues(_headCache, context.graph());
-	        reloadUnsquareIssues(_baseCache, context.history().base());
+	  var _deferredST = new Set(); // Set( SetTimeout handles )
 
-	        dispatch$1.call('validated');
-	    };
 
-	    function reloadUnsquareIssues(cache, graph) {
+	  var _headPromise; // Promise fulfilled when validation is performed up to headGraph snapshot
 
-	        var checkUnsquareWay = _rules.unsquare_way;
-	        if (typeof checkUnsquareWay !== 'function') { return; }
 
-	        // uncache existing
-	        cache.uncacheIssuesOfType('unsquare_way');
+	  var RETRY = 5000; // wait 5sec before revalidating provisional entities
+	  // Allow validation severity to be overridden by url queryparams...
+	  // See: https://github.com/openstreetmap/iD/pull/8243
+	  //
+	  // Each param should contain a urlencoded comma separated list of
+	  // `type/subtype` rules.  `*` may be used as a wildcard..
+	  // Examples:
+	  //  `validationError=disconnected_way/*`
+	  //  `validationError=disconnected_way/highway`
+	  //  `validationError=crossing_ways/bridge*`
+	  //  `validationError=crossing_ways/bridge*,crossing_ways/tunnel*`
+
+	  var _errorOverrides = parseHashParam(context.initialHashParams.validationError);
+
+	  var _warningOverrides = parseHashParam(context.initialHashParams.validationWarning);
+
+	  var _disableOverrides = parseHashParam(context.initialHashParams.validationDisable); // `parseHashParam()`   (private)
+	  // Checks hash parameters for severity overrides
+	  // Arguments
+	  //   `param` - a url hash parameter (`validationError`, `validationWarning`, or `validationDisable`)
+	  // Returns
+	  //   Array of Objects like { type: RegExp, subtype: RegExp }
+	  //
 
-	        var buildings = context.history().tree().intersects(geoExtent([-180,-90],[180, 90]), graph)  // everywhere
-	            .filter(function(entity) {
-	                return entity.type === 'way' && entity.tags.building && entity.tags.building !== 'no';
-	            });
 
-	        // rerun for all buildings
-	        buildings.forEach(function(entity) {
-	            var detected = checkUnsquareWay(entity, graph);
-	            if (detected.length !== 1) { return; }
-	            var issue = detected[0];
-	            if (!cache.issuesByEntityID[entity.id]) {
-	                cache.issuesByEntityID[entity.id] = new Set();
-	            }
-	            cache.issuesByEntityID[entity.id].add(issue.id);
-	            cache.issuesByIssueID[issue.id] = issue;
-	        });
-	    }
+	  function parseHashParam(param) {
+	    var result = [];
+	    var rules = (param || '').split(',');
+	    rules.forEach(function (rule) {
+	      rule = rule.trim();
+	      var parts = rule.split('/', 2); // "type/subtype"
+
+	      var type = parts[0];
+	      var subtype = parts[1] || '*';
+	      if (!type || !subtype) return;
+	      result.push({
+	        type: makeRegExp(type),
+	        subtype: makeRegExp(subtype)
+	      });
+	    });
+	    return result;
 
-	    // options = {
-	    //     what: 'all',     // 'all' or 'edited'
-	    //     where: 'all',   // 'all' or 'visible'
-	    //     includeIgnored: false   // true, false, or 'only'
-	    //     includeDisabledRules: false   // true, false, or 'only'
-	    // };
-	    validator.getIssues = function(options) {
-	        var opts = Object.assign({ what: 'all', where: 'all', includeIgnored: false, includeDisabledRules: false }, options);
-	        var issues = Object.values(_headCache.issuesByIssueID);
-	        var view = context.map().extent();
-
-	        return issues.filter(function(issue) {
-	            if (!issue) { return false; }
-	            if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) { return false; }
-	            if (!opts.includeDisabledRules && _disabledRules[issue.type]) { return false; }
-
-	            if (opts.includeIgnored === 'only' && !_ignoredIssueIDs[issue.id]) { return false; }
-	            if (!opts.includeIgnored && _ignoredIssueIDs[issue.id]) { return false; }
-
-	            // Sanity check:  This issue may be for an entity that not longer exists.
-	            // If we detect this, uncache and return false so it is not included..
-	            var entityIds = issue.entityIds || [];
-	            for (var i = 0; i < entityIds.length; i++) {
-	                var entityId = entityIds[i];
-	                if (!context.hasEntity(entityId)) {
-	                    delete _headCache.issuesByEntityID[entityId];
-	                    delete _headCache.issuesByIssueID[issue.id];
-	                    return false;
-	                }
-	            }
+	    function makeRegExp(str) {
+	      var escaped = str.replace(/[-\/\\^$+?.()|[\]{}]/g, '\\$&') // escape all reserved chars except for the '*'
+	      .replace(/\*/g, '.*'); // treat a '*' like '.*'
 
-	            if (opts.what === 'edited' && _baseCache.issuesByIssueID[issue.id]) { return false; }
+	      return new RegExp('^' + escaped + '$');
+	    }
+	  } // `init()`
+	  // Initialize the validator, called once on iD startup
+	  //
 
-	            if (opts.where === 'visible') {
-	                var extent = issue.extent(context.graph());
-	                if (!view.intersects(extent)) { return false; }
-	            }
 
-	            return true;
-	        });
-	    };
+	  validator.init = function () {
+	    Object.values(Validations).forEach(function (validation) {
+	      if (typeof validation !== 'function') return;
+	      var fn = validation(context);
+	      var key = fn.type;
+	      _rules[key] = fn;
+	    });
+	    var disabledRules = corePreferences('validate-disabledRules');
 
-	    validator.getResolvedIssues = function() {
-	        var baseIssues = Object.values(_baseCache.issuesByIssueID);
-	        return baseIssues.filter(function(issue) {
-	            return !_headCache.issuesByIssueID[issue.id];
-	        });
-	    };
+	    if (disabledRules) {
+	      disabledRules.split(',').forEach(function (k) {
+	        return _disabledRules[k] = true;
+	      });
+	    }
+	  }; // `reset()`   (private)
+	  // Cancels deferred work and resets all caches
+	  //
+	  // Arguments
+	  //   `resetIgnored` - `true` to clear the list of user-ignored issues
+	  //
 
-	    validator.focusIssue = function(issue) {
-	        var extent = issue.extent(context.graph());
 
-	        if (extent) {
-	            var setZoom = Math.max(context.map().zoom(), 19);
-	            context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
-
-	            // select the first entity
-	            if (issue.entityIds && issue.entityIds.length) {
-	                window.setTimeout(function() {
-	                    var ids = issue.entityIds;
-	                    context.enter(modeSelect(context, [ids[0]]));
-	                    dispatch$1.call('focusedIssue', this, issue);
-	                }, 250);  // after ease
-	            }
-	        }
-	    };
+	  function reset(resetIgnored) {
+	    // cancel deferred work
+	    _deferredRIC.forEach(window.cancelIdleCallback);
 
+	    _deferredRIC.clear();
 
-	    validator.getIssuesBySeverity = function(options) {
-	        var groups = utilArrayGroupBy(validator.getIssues(options), 'severity');
-	        groups.error = groups.error || [];
-	        groups.warning = groups.warning || [];
-	        return groups;
-	    };
+	    _deferredST.forEach(window.clearTimeout);
 
-	    // show some issue types in a particular order
-	    var orderedIssueTypes = [
-	        // flag missing data first
-	        'missing_tag', 'missing_role',
-	        // then flag identity issues
-	        'outdated_tags', 'mismatched_geometry',
-	        // flag geometry issues where fixing them might solve connectivity issues
-	        'crossing_ways', 'almost_junction',
-	        // then flag connectivity issues
-	        'disconnected_way', 'impossible_oneway'
-	    ];
+	    _deferredST.clear(); // empty queues and resolve any pending promise
 
-	    // returns the issues that the given entity IDs have in common, matching the given options
-	    validator.getSharedEntityIssues = function(entityIDs, options) {
-	        var cache = _headCache;
 
-	        // gather the issues that are common to all the entities
-	        var issueIDs = entityIDs.reduce(function(acc, entityID) {
-	            var entityIssueIDs = cache.issuesByEntityID[entityID] || new Set();
-	            if (!acc) {
-	                return new Set(entityIssueIDs);
-	            }
-	            return new Set([].concat( acc ).filter(function(elem) {
-	                return entityIssueIDs.has(elem);
-	            }));
-	        }, null) || [];
+	    _baseCache.queue = [];
+	    _headCache.queue = [];
+	    processQueue(_headCache);
+	    processQueue(_baseCache); // clear caches
 
-	        var opts = options || {};
+	    if (resetIgnored) _ignoredIssueIDs.clear();
 
-	        return Array.from(issueIDs)
-	            .map(function(id) { return cache.issuesByIssueID[id]; })
-	            .filter(function(issue) {
-	                if (!issue) { return false; }
-	                if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) { return false; }
-	                if (!opts.includeDisabledRules && _disabledRules[issue.type]) { return false; }
+	    _resolvedIssueIDs.clear();
 
-	                if (opts.includeIgnored === 'only' && !_ignoredIssueIDs[issue.id]) { return false; }
-	                if (!opts.includeIgnored && _ignoredIssueIDs[issue.id]) { return false; }
+	    _baseCache = validationCache('base');
+	    _headCache = validationCache('head');
+	    _completeDiff = {};
+	    _headIsCurrent = false;
+	  } // `reset()`
+	  // clear caches, called whenever iD resets after a save or switches sources
+	  // (clears out the _ignoredIssueIDs set also)
+	  //
 
-	                return true;
-	            }).sort(function(issue1, issue2) {
-	                if (issue1.type === issue2.type) {
-	                    // issues of the same type, sort deterministically
-	                    return issue1.id < issue2.id ? -1 : 1;
-	                }
-	                var index1 = orderedIssueTypes.indexOf(issue1.type);
-	                var index2 = orderedIssueTypes.indexOf(issue2.type);
-	                if (index1 !== -1 && index2 !== -1) {
-	                    // both issue types have explicit sort orders
-	                    return index1 - index2;
-	                } else if (index1 === -1 && index2 === -1) {
-	                    // neither issue type has an explicit sort order, sort by type
-	                    return issue1.type < issue2.type ? -1 : 1;
-	                } else {
-	                    // order explicit types before everything else
-	                    return index1 !== -1 ? -1 : 1;
-	                }
-	            });
-	    };
 
+	  validator.reset = function () {
+	    reset(true);
+	  }; // `resetIgnoredIssues()`
+	  // clears out the _ignoredIssueIDs Set
+	  //
 
-	    validator.getEntityIssues = function(entityID, options) {
-	        return validator.getSharedEntityIssues([entityID], options);
-	    };
 
+	  validator.resetIgnoredIssues = function () {
+	    _ignoredIssueIDs.clear();
 
-	    validator.getRuleKeys = function() {
-	        return Object.keys(_rules);
-	    };
+	    dispatch.call('validated'); // redraw UI
+	  }; // `revalidateUnsquare()`
+	  // Called whenever the user changes the unsquare threshold
+	  // It reruns just the "unsquare_way" validation on all buildings.
+	  //
 
 
-	    validator.isRuleEnabled = function(key) {
-	        return !_disabledRules[key];
-	    };
+	  validator.revalidateUnsquare = function () {
+	    revalidateUnsquare(_headCache);
+	    revalidateUnsquare(_baseCache);
+	    dispatch.call('validated');
+	  };
 
+	  function revalidateUnsquare(cache) {
+	    var checkUnsquareWay = _rules.unsquare_way;
+	    if (!cache.graph || typeof checkUnsquareWay !== 'function') return; // uncache existing
 
-	    validator.toggleRule = function(key) {
-	        if (_disabledRules[key]) {
-	            delete _disabledRules[key];
-	        } else {
-	            _disabledRules[key] = true;
-	        }
+	    cache.uncacheIssuesOfType('unsquare_way');
+	    var buildings = context.history().tree().intersects(geoExtent([-180, -90], [180, 90]), cache.graph) // everywhere
+	    .filter(function (entity) {
+	      return entity.type === 'way' && entity.tags.building && entity.tags.building !== 'no';
+	    }); // rerun for all buildings
 
-	        corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-	        validator.validate();
-	    };
+	    buildings.forEach(function (entity) {
+	      var detected = checkUnsquareWay(entity, cache.graph);
+	      if (!detected.length) return;
+	      cache.cacheIssues(detected);
+	    });
+	  } // `getIssues()`
+	  // Gets all issues that match the given options
+	  // This is called by many other places
+	  //
+	  // Arguments
+	  //   `options` Object like:
+	  //   {
+	  //     what: 'all',                  // 'all' or 'edited'
+	  //     where: 'all',                 // 'all' or 'visible'
+	  //     includeIgnored: false,        // true, false, or 'only'
+	  //     includeDisabledRules: false   // true, false, or 'only'
+	  //   }
+	  //
+	  // Returns
+	  //   An Array containing the issues
+	  //
 
 
-	    validator.disableRules = function(keys) {
-	        _disabledRules = {};
-	        keys.forEach(function(k) {
-	            _disabledRules[k] = true;
+	  validator.getIssues = function (options) {
+	    var opts = Object.assign({
+	      what: 'all',
+	      where: 'all',
+	      includeIgnored: false,
+	      includeDisabledRules: false
+	    }, options);
+	    var view = context.map().extent();
+	    var seen = new Set();
+	    var results = []; // collect head issues - present in the user edits
+
+	    if (_headCache.graph && _headCache.graph !== _baseCache.graph) {
+	      Object.values(_headCache.issuesByIssueID).forEach(function (issue) {
+	        // In the head cache, only count features that the user is responsible for - #8632
+	        // For example, a user can undo some work and an issue will still present in the
+	        // head graph, but we don't want to credit the user for causing that issue.
+	        var userModified = (issue.entityIds || []).some(function (id) {
+	          return _completeDiff.hasOwnProperty(id);
 	        });
+	        if (opts.what === 'edited' && !userModified) return; // present in head but user didn't touch it
 
-	        corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-	        validator.validate();
-	    };
+	        if (!filter(issue)) return;
+	        seen.add(issue.id);
+	        results.push(issue);
+	      });
+	    } // collect base issues - present before user edits
 
 
-	    validator.ignoreIssue = function(id) {
-	        _ignoredIssueIDs[id] = true;
-	    };
+	    if (opts.what === 'all') {
+	      Object.values(_baseCache.issuesByIssueID).forEach(function (issue) {
+	        if (!filter(issue)) return;
+	        seen.add(issue.id);
+	        results.push(issue);
+	      });
+	    }
 
+	    return results; // Filter the issue set to include only what the calling code wants to see.
+	    // Note that we use `context.graph()`/`context.hasEntity()` here, not `cache.graph`,
+	    // because that is the graph that the calling code will be using.
 
-	    //
-	    // Run validation on a single entity for the given graph
-	    //
-	    function validateEntity(entity, graph) {
-	        var entityIssues = [];
+	    function filter(issue) {
+	      if (!issue) return false;
+	      if (seen.has(issue.id)) return false;
+	      if (_resolvedIssueIDs.has(issue.id)) return false;
+	      if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) return false;
+	      if (!opts.includeDisabledRules && _disabledRules[issue.type]) return false;
+	      if (opts.includeIgnored === 'only' && !_ignoredIssueIDs.has(issue.id)) return false;
+	      if (!opts.includeIgnored && _ignoredIssueIDs.has(issue.id)) return false; // This issue may involve an entity that doesn't exist in context.graph()
+	      // This can happen because validation is async and rendering the issue lists is async.
 
-	        // runs validation and appends resulting issues
-	        function runValidation(key) {
+	      if ((issue.entityIds || []).some(function (id) {
+	        return !context.hasEntity(id);
+	      })) return false;
 
-	            var fn = _rules[key];
-	            if (typeof fn !== 'function') {
-	                console.error('no such validation rule = ' + key);  // eslint-disable-line no-console
-	                return;
-	            }
+	      if (opts.where === 'visible') {
+	        var extent = issue.extent(context.graph());
+	        if (!view.intersects(extent)) return false;
+	      }
+
+	      return true;
+	    }
+	  }; // `getResolvedIssues()`
+	  // Gets the issues that have been fixed by the user.
+	  //
+	  // Resolved issues are tracked in the `_resolvedIssueIDs` Set,
+	  // and they should all be issues that exist in the _baseCache.
+	  //
+	  // Returns
+	  //   An Array containing the issues
+	  //
+
+
+	  validator.getResolvedIssues = function () {
+	    return Array.from(_resolvedIssueIDs).map(function (issueID) {
+	      return _baseCache.issuesByIssueID[issueID];
+	    }).filter(Boolean);
+	  }; // `focusIssue()`
+	  // Adjusts the map to focus on the given issue.
+	  // (requires the issue to have a reasonable extent defined)
+	  //
+	  // Arguments
+	  //   `issue` - the issue to focus on
+	  //
+
+
+	  validator.focusIssue = function (issue) {
+	    // Note that we use `context.graph()`/`context.hasEntity()` here, not `cache.graph`,
+	    // because that is the graph that the calling code will be using.
+	    var graph = context.graph();
+	    var selectID;
+	    var focusCenter; // Try to focus the map at the center of the issue..
+
+	    var issueExtent = issue.extent(graph);
+
+	    if (issueExtent) {
+	      focusCenter = issueExtent.center();
+	    } // Try to select the first entity in the issue..
+
+
+	    if (issue.entityIds && issue.entityIds.length) {
+	      selectID = issue.entityIds[0]; // If a relation, focus on one of its members instead.
+	      // Otherwise we might be focusing on a part of map where the relation is not visible.
+
+	      if (selectID && selectID.charAt(0) === 'r') {
+	        // relation
+	        var ids = utilEntityAndDeepMemberIDs([selectID], graph);
+	        var nodeID = ids.find(function (id) {
+	          return id.charAt(0) === 'n' && graph.hasEntity(id);
+	        });
+
+	        if (!nodeID) {
+	          // relation has no downloaded nodes to focus on
+	          var wayID = ids.find(function (id) {
+	            return id.charAt(0) === 'w' && graph.hasEntity(id);
+	          });
+
+	          if (wayID) {
+	            nodeID = graph.entity(wayID).first(); // focus on the first node of this way
+	          }
+	        }
 
-	            var detected = fn(entity, graph);
-	            entityIssues = entityIssues.concat(detected);
+	        if (nodeID) {
+	          focusCenter = graph.entity(nodeID).loc;
 	        }
+	      }
+	    }
 
-	        // run all rules
-	        Object.keys(_rules).forEach(runValidation);
+	    if (focusCenter) {
+	      // Adjust the view
+	      var setZoom = Math.max(context.map().zoom(), 19);
+	      context.map().unobscuredCenterZoomEase(focusCenter, setZoom);
+	    }
 
-	        return entityIssues;
+	    if (selectID) {
+	      // Enter select mode
+	      window.setTimeout(function () {
+	        context.enter(modeSelect(context, [selectID]));
+	        dispatch.call('focusedIssue', _this, issue);
+	      }, 250); // after ease
 	    }
+	  }; // `getIssuesBySeverity()`
+	  // Gets the issues then groups them by error/warning
+	  // (This just calls getIssues, then puts issues in groups)
+	  //
+	  // Arguments
+	  //   `options` - (see `getIssues`)
+	  // Returns
+	  //   Object result like:
+	  //   {
+	  //     error:    Array of errors,
+	  //     warning:  Array of warnings
+	  //   }
+	  //
 
-	    function entityIDsToValidate(entityIDs, graph) {
-	        var processedIDs = new Set();
-	        return entityIDs.reduce(function(acc, entityID) {
-	            // keep redundancy check separate from `acc` because an `entityID`
-	            // could have been added to `acc` as a related entity through an earlier pass
-	            if (processedIDs.has(entityID)) { return acc; }
-	            processedIDs.add(entityID);
 
-	            var entity = graph.hasEntity(entityID);
-	            if (!entity) { return acc; }
+	  validator.getIssuesBySeverity = function (options) {
+	    var groups = utilArrayGroupBy(validator.getIssues(options), 'severity');
+	    groups.error = groups.error || [];
+	    groups.warning = groups.warning || [];
+	    return groups;
+	  }; // `getEntityIssues()`
+	  // Gets the issues that the given entity IDs have in common, matching the given options
+	  // (This just calls getIssues, then filters for the given entity IDs)
+	  // The issues are sorted for relevance
+	  //
+	  // Arguments
+	  //   `entityIDs` - Array or Set of entityIDs to get issues for
+	  //   `options` - (see `getIssues`)
+	  // Returns
+	  //   An Array containing the issues
+	  //
 
-	            acc.add(entityID);
 
-	            var checkParentRels = [entity];
+	  validator.getSharedEntityIssues = function (entityIDs, options) {
+	    var orderedIssueTypes = [// Show some issue types in a particular order:
+	    'missing_tag', 'missing_role', // - missing data first
+	    'outdated_tags', 'mismatched_geometry', // - identity issues
+	    'crossing_ways', 'almost_junction', // - geometry issues where fixing them might solve connectivity issues
+	    'disconnected_way', 'impossible_oneway' // - finally connectivity issues
+	    ];
+	    var allIssues = validator.getIssues(options);
+	    var forEntityIDs = new Set(entityIDs);
+	    return allIssues.filter(function (issue) {
+	      return (issue.entityIds || []).some(function (entityID) {
+	        return forEntityIDs.has(entityID);
+	      });
+	    }).sort(function (issue1, issue2) {
+	      if (issue1.type === issue2.type) {
+	        // issues of the same type, sort deterministically
+	        return issue1.id < issue2.id ? -1 : 1;
+	      }
 
-	            if (entity.type === 'node') {
-	                graph.parentWays(entity).forEach(function(parentWay) {
-	                    acc.add(parentWay.id); // include parent ways
-	                    checkParentRels.push(parentWay);
-	                });
-	            } else if (entity.type === 'relation') {
-	                entity.members.forEach(function(member) {
-	                    acc.add(member.id); // include members
-	                });
-	            } else if (entity.type === 'way') {
-	                entity.nodes.forEach(function(nodeID) {
-	                    acc.add(nodeID); // include child nodes
-	                    graph._parentWays[nodeID].forEach(function(wayID) {
-	                        acc.add(wayID); // include connected ways
-	                    });
-	                });
-	            }
+	      var index1 = orderedIssueTypes.indexOf(issue1.type);
+	      var index2 = orderedIssueTypes.indexOf(issue2.type);
 
-	            checkParentRels.forEach(function(entity) {   // include parent relations
-	                if (entity.type !== 'relation') {        // but not super-relations
-	                    graph.parentRelations(entity).forEach(function(parentRelation) {
-	                        acc.add(parentRelation.id);
-	                    });
-	                }
-	            });
+	      if (index1 !== -1 && index2 !== -1) {
+	        // both issue types have explicit sort orders
+	        return index1 - index2;
+	      } else if (index1 === -1 && index2 === -1) {
+	        // neither issue type has an explicit sort order, sort by type
+	        return issue1.type < issue2.type ? -1 : 1;
+	      } else {
+	        // order explicit types before everything else
+	        return index1 !== -1 ? -1 : 1;
+	      }
+	    });
+	  }; // `getEntityIssues()`
+	  // Get an array of detected issues for the given entityID.
+	  // (This just calls getSharedEntityIssues for a single entity)
+	  //
+	  // Arguments
+	  //   `entityID` - the entity ID to get the issues for
+	  //   `options` - (see `getIssues`)
+	  // Returns
+	  //   An Array containing the issues
+	  //
+
+
+	  validator.getEntityIssues = function (entityID, options) {
+	    return validator.getSharedEntityIssues([entityID], options);
+	  }; // `getRuleKeys()`
+	  //
+	  // Returns
+	  //   An Array containing the rule keys
+	  //
+
+
+	  validator.getRuleKeys = function () {
+	    return Object.keys(_rules);
+	  }; // `isRuleEnabled()`
+	  //
+	  // Arguments
+	  //   `key` - the rule to check (e.g. 'crossing_ways')
+	  // Returns
+	  //   `true`/`false`
+	  //
 
-	            return acc;
 
-	        }, new Set());
+	  validator.isRuleEnabled = function (key) {
+	    return !_disabledRules[key];
+	  }; // `toggleRule()`
+	  // Toggles a single validation rule,
+	  // then reruns the validation so that the user sees something happen in the UI
+	  //
+	  // Arguments
+	  //   `key` - the rule to toggle (e.g. 'crossing_ways')
+	  //
+
+
+	  validator.toggleRule = function (key) {
+	    if (_disabledRules[key]) {
+	      delete _disabledRules[key];
+	    } else {
+	      _disabledRules[key] = true;
 	    }
 
-	    //
-	    // Run validation for several entities, supplied `entityIDs`,
-	    // against `graph` for the given `cache`
-	    //
-	    function validateEntities(entityIDs, graph, cache) {
+	    corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
+	    validator.validate();
+	  }; // `disableRules()`
+	  // Disables given validation rules,
+	  // then reruns the validation so that the user sees something happen in the UI
+	  //
+	  // Arguments
+	  //   `keys` - Array or Set containing rule keys to disable
+	  //
+
 
-	        // clear caches for existing issues related to these entities
-	        entityIDs.forEach(cache.uncacheEntityID);
+	  validator.disableRules = function (keys) {
+	    _disabledRules = {};
+	    keys.forEach(function (k) {
+	      return _disabledRules[k] = true;
+	    });
+	    corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
+	    validator.validate();
+	  }; // `ignoreIssue()`
+	  // Don't show the given issue in lists
+	  //
+	  // Arguments
+	  //   `issueID` - the issueID
+	  //
 
-	        // detect new issues and update caches
-	        entityIDs.forEach(function(entityID) {
-	            var entity = graph.hasEntity(entityID);
-	            // don't validate deleted entities
-	            if (!entity) { return; }
 
-	            var issues = validateEntity(entity, graph);
-	            cache.cacheIssues(issues);
-	        });
+	  validator.ignoreIssue = function (issueID) {
+	    _ignoredIssueIDs.add(issueID);
+	  }; // `validate()`
+	  // Validates anything that has changed in the head graph since the last time it was run.
+	  // (head graph contains user's edits)
+	  //
+	  // Returns
+	  //   A Promise fulfilled when the validation has completed and then dispatches a `validated` event.
+	  //   This may take time but happen in the background during browser idle time.
+	  //
+
+
+	  validator.validate = function () {
+	    // Make sure the caches have graphs assigned to them.
+	    // (we don't do this in `reset` because context is still resetting things and `history.base()` is unstable then)
+	    var baseGraph = context.history().base();
+	    if (!_headCache.graph) _headCache.graph = baseGraph;
+	    if (!_baseCache.graph) _baseCache.graph = baseGraph;
+	    var prevGraph = _headCache.graph;
+	    var currGraph = context.graph();
+
+	    if (currGraph === prevGraph) {
+	      // _headCache.graph is current - we are caught up
+	      _headIsCurrent = true;
+	      dispatch.call('validated');
+	      return Promise.resolve();
 	    }
 
+	    if (_headPromise) {
+	      // Validation already in process, but we aren't caught up to current
+	      _headIsCurrent = false; // We will need to catch up after the validation promise fulfills
 
-	    //
-	    // Validates anything that has changed since the last time it was run.
-	    // Also updates the "validatedGraph" to be the current graph
-	    // and dispatches a `validated` event when finished.
-	    //
-	    validator.validate = function() {
+	      return _headPromise;
+	    } // If we get here, its time to start validating stuff.
 
-	        var currGraph = context.graph();
-	        _validatedGraph = _validatedGraph || context.history().base();
-	        if (currGraph === _validatedGraph) {
-	            dispatch$1.call('validated');
-	            return;
-	        }
-	        var oldGraph = _validatedGraph;
-	        var difference = coreDifference(oldGraph, currGraph);
-	        _validatedGraph = currGraph;
 
-	        var createdAndModifiedEntityIDs = difference.extantIDs(true);   // created/modified (true = w/relation members)
-	        var entityIDsToCheck = entityIDsToValidate(createdAndModifiedEntityIDs, currGraph);
+	    _headCache.graph = currGraph; // take snapshot
+
+	    _completeDiff = context.history().difference().complete();
+	    var incrementalDiff = coreDifference(prevGraph, currGraph);
+	    var entityIDs = Object.keys(incrementalDiff.complete());
+	    entityIDs = _headCache.withAllRelatedEntities(entityIDs); // expand set
 
-	        // check modified and deleted entities against the old graph in order to update their related entities
-	        // (e.g. deleting the only highway connected to a road should create a disconnected highway issue)
-	        var modifiedAndDeletedEntityIDs = difference.deleted().concat(difference.modified())
-	            .map(function(entity) { return entity.id; });
-	        var entityIDsToCheckForOldGraph = entityIDsToValidate(modifiedAndDeletedEntityIDs, oldGraph);
+	    if (!entityIDs.size) {
+	      dispatch.call('validated');
+	      return Promise.resolve();
+	    }
 
-	        // concat the sets
-	        entityIDsToCheckForOldGraph.forEach(entityIDsToCheck.add, entityIDsToCheck);
+	    _headPromise = validateEntitiesAsync(entityIDs, _headCache).then(function () {
+	      return updateResolvedIssues(entityIDs);
+	    }).then(function () {
+	      return dispatch.call('validated');
+	    })["catch"](function () {
+	      /* ignore */
+	    }).then(function () {
+	      _headPromise = null;
 
-	        validateEntities(entityIDsToCheck, context.graph(), _headCache);
+	      if (!_headIsCurrent) {
+	        validator.validate(); // run it again to catch up to current graph
+	      }
+	    });
+	    return _headPromise;
+	  }; // register event handlers:
+	  // WHEN TO RUN VALIDATION:
+	  // When history changes:
+
+
+	  context.history().on('restore.validator', validator.validate) // on restore saved history
+	  .on('undone.validator', validator.validate) // on undo
+	  .on('redone.validator', validator.validate) // on redo
+	  .on('reset.validator', function () {
+	    // on history reset - happens after save, or enter/exit walkthrough
+	    reset(false); // cached issues aren't valid any longer if the history has been reset
+
+	    validator.validate();
+	  }); // but not on 'change' (e.g. while drawing)
+	  // When user changes editing modes (to catch recent changes e.g. drawing)
+
+	  context.on('exit.validator', validator.validate); // When merging fetched data, validate base graph:
+
+	  context.history().on('merge.validator', function (entities) {
+	    if (!entities) return; // Make sure the caches have graphs assigned to them.
+	    // (we don't do this in `reset` because context is still resetting things and `history.base()` is unstable then)
+
+	    var baseGraph = context.history().base();
+	    if (!_headCache.graph) _headCache.graph = baseGraph;
+	    if (!_baseCache.graph) _baseCache.graph = baseGraph;
+	    var entityIDs = entities.map(function (entity) {
+	      return entity.id;
+	    });
+	    entityIDs = _baseCache.withAllRelatedEntities(entityIDs); // expand set
+
+	    validateEntitiesAsync(entityIDs, _baseCache);
+	  }); // `validateEntity()`   (private)
+	  // Runs all validation rules on a single entity.
+	  // Some things to note:
+	  //  - Graph is passed in from whenever the validation was started.  Validators shouldn't use
+	  //   `context.graph()` because this all happens async, and the graph might have changed
+	  //   (for example, nodes getting deleted before the validation can run)
+	  //  - Validator functions may still be waiting on something and return a "provisional" result.
+	  //    In this situation, we will schedule to revalidate the entity sometime later.
+	  //
+	  // Arguments
+	  //   `entity` - The entity
+	  //   `graph` - graph containing the entity
+	  //
+	  // Returns
+	  //   Object result like:
+	  //   {
+	  //     issues:       Array of detected issues
+	  //     provisional:  `true` if provisional result, `false` if final result
+	  //   }
+	  //
 
-	        dispatch$1.call('validated');
+	  function validateEntity(entity, graph) {
+	    var result = {
+	      issues: [],
+	      provisional: false
 	    };
+	    Object.keys(_rules).forEach(runValidation); // run all rules
 
+	    return result; // runs validation and appends resulting issues
 
-	    // WHEN TO RUN VALIDATION:
-	    // When graph changes:
-	    context.history()
-	        .on('restore.validator', validator.validate)   // restore saved history
-	        .on('undone.validator', validator.validate)    // undo
-	        .on('redone.validator', validator.validate);   // redo
-	        // but not on 'change' (e.g. while drawing)
+	    function runValidation(key) {
+	      var fn = _rules[key];
 
-	    // When user chages editing modes:
-	    context
-	        .on('exit.validator', validator.validate);
+	      if (typeof fn !== 'function') {
+	        console.error('no such validation rule = ' + key); // eslint-disable-line no-console
 
-	    // When merging fetched data:
-	    context.history()
-	        .on('merge.validator', function(entities) {
-	            if (!entities) { return; }
-	            var handle = window.requestIdleCallback(function() {
-	                var entityIDs = entities.map(function(entity) { return entity.id; });
-	                var headGraph = context.graph();
-	                validateEntities(entityIDsToValidate(entityIDs, headGraph), headGraph, _headCache);
+	        return;
+	      }
 
-	                var baseGraph = context.history().base();
-	                validateEntities(entityIDsToValidate(entityIDs, baseGraph), baseGraph, _baseCache);
+	      var detected = fn(entity, graph);
 
-	                dispatch$1.call('validated');
-	            });
-	            _deferred.add(handle);
-	        });
+	      if (detected.provisional) {
+	        // this validation should be run again later
+	        result.provisional = true;
+	      }
 
+	      detected = detected.filter(applySeverityOverrides);
+	      result.issues = result.issues.concat(detected); // If there are any override rules that match the issue type/subtype,
+	      // adjust severity (or disable it) and keep/discard as quickly as possible.
 
-	    return validator;
-	}
+	      function applySeverityOverrides(issue) {
+	        var type = issue.type;
+	        var subtype = issue.subtype || '';
+	        var i;
 
+	        for (i = 0; i < _errorOverrides.length; i++) {
+	          if (_errorOverrides[i].type.test(type) && _errorOverrides[i].subtype.test(subtype)) {
+	            issue.severity = 'error';
+	            return true;
+	          }
+	        }
 
-	function validationCache() {
+	        for (i = 0; i < _warningOverrides.length; i++) {
+	          if (_warningOverrides[i].type.test(type) && _warningOverrides[i].subtype.test(subtype)) {
+	            issue.severity = 'warning';
+	            return true;
+	          }
+	        }
 
-	    var cache = {
-	        issuesByIssueID: {},  // issue.id -> issue
-	        issuesByEntityID: {} // entity.id -> set(issue.id)
-	    };
+	        for (i = 0; i < _disableOverrides.length; i++) {
+	          if (_disableOverrides[i].type.test(type) && _disableOverrides[i].subtype.test(subtype)) {
+	            return false;
+	          }
+	        }
 
-	    cache.cacheIssues = function(issues) {
-	        issues.forEach(function(issue) {
-	            var entityIds = issue.entityIds || [];
-	            entityIds.forEach(function(entityId) {
-	                if (!cache.issuesByEntityID[entityId]) {
-	                    cache.issuesByEntityID[entityId] = new Set();
-	                }
-	                cache.issuesByEntityID[entityId].add(issue.id);
-	            });
-	            cache.issuesByIssueID[issue.id] = issue;
-	        });
-	    };
+	        return true;
+	      }
+	    }
+	  } // `updateResolvedIssues()`   (private)
+	  // Determine if any issues were resolved for the given entities.
+	  // This is called by `validate()` after validation of the head graph
+	  //
+	  // Give the user credit for fixing an issue if:
+	  // - the issue is in the base cache
+	  // - the issue is not in the head cache
+	  // - the user did something to one of the entities involved in the issue
+	  //
+	  // Arguments
+	  //   `entityIDs` - Array or Set containing entity IDs.
+	  //
 
-	    cache.uncacheIssue = function(issue) {
-	        // When multiple entities are involved (e.g. crossing_ways),
-	        // remove this issue from the other entity caches too..
-	        var entityIds = issue.entityIds || [];
-	        entityIds.forEach(function(entityId) {
-	            if (cache.issuesByEntityID[entityId]) {
-	                cache.issuesByEntityID[entityId].delete(issue.id);
-	            }
+
+	  function updateResolvedIssues(entityIDs) {
+	    entityIDs.forEach(function (entityID) {
+	      var baseIssues = _baseCache.issuesByEntityID[entityID];
+	      if (!baseIssues) return;
+	      baseIssues.forEach(function (issueID) {
+	        // Check if the user did something to one of the entities involved in this issue.
+	        // (This issue could involve multiple entities, e.g. disconnected routable features)
+	        var issue = _baseCache.issuesByIssueID[issueID];
+	        var userModified = (issue.entityIds || []).some(function (id) {
+	          return _completeDiff.hasOwnProperty(id);
 	        });
-	        delete cache.issuesByIssueID[issue.id];
-	    };
 
-	    cache.uncacheIssues = function(issues) {
-	        issues.forEach(cache.uncacheIssue);
-	    };
+	        if (userModified && !_headCache.issuesByIssueID[issueID]) {
+	          // issue seems fixed
+	          _resolvedIssueIDs.add(issueID);
+	        } else {
+	          // issue still not resolved
+	          _resolvedIssueIDs["delete"](issueID); // (did undo, or possibly fixed and then re-caused the issue)
 
-	    cache.uncacheIssuesOfType = function(type) {
-	        var issuesOfType = Object.values(cache.issuesByIssueID)
-	            .filter(function(issue) { return issue.type === type; });
-	        cache.uncacheIssues(issuesOfType);
-	    };
+	        }
+	      });
+	    });
+	  } // `validateEntitiesAsync()`   (private)
+	  // Schedule validation for many entities.
+	  //
+	  // Arguments
+	  //   `entityIDs` - Array or Set containing entityIDs.
+	  //   `graph` - the graph to validate that contains those entities
+	  //   `cache` - the cache to store results in (_headCache or _baseCache)
+	  //
+	  // Returns
+	  //   A Promise fulfilled when the validation has completed.
+	  //   This may take time but happen in the background during browser idle time.
+	  //
 
-	    //
-	    // Remove a single entity and all its related issues from the caches
-	    //
-	    cache.uncacheEntityID = function(entityID) {
-	        var issueIDs = cache.issuesByEntityID[entityID];
-	        if (!issueIDs) { return; }
-
-	        issueIDs.forEach(function(issueID) {
-	            var issue = cache.issuesByIssueID[issueID];
-	            if (issue) {
-	                cache.uncacheIssue(issue);
-	            } else {
-	                delete cache.issuesByIssueID[issueID];
-	            }
-	        });
 
-	        delete cache.issuesByEntityID[entityID];
-	    };
+	  function validateEntitiesAsync(entityIDs, cache) {
+	    // Enqueue the work
+	    var jobs = Array.from(entityIDs).map(function (entityID) {
+	      if (cache.queuedEntityIDs.has(entityID)) return null; // queued already
 
-	    return cache;
-	}
+	      cache.queuedEntityIDs.add(entityID); // Clear caches for existing issues related to this entity
 
-	function coreUploader(context) {
+	      cache.uncacheEntityID(entityID);
+	      return function () {
+	        cache.queuedEntityIDs["delete"](entityID);
+	        var graph = cache.graph;
+	        if (!graph) return; // was reset?
 
-	    var dispatch$1 = dispatch(
-	        // Start and end events are dispatched exactly once each per legitimate outside call to `save`
-	        'saveStarted', // dispatched as soon as a call to `save` has been deemed legitimate
-	        'saveEnded',   // dispatched after the result event has been dispatched
+	        var entity = graph.hasEntity(entityID); // Sanity check: don't validate deleted entities
 
-	        'willAttemptUpload', // dispatched before the actual upload call occurs, if it will
-	        'progressChanged',
+	        if (!entity) return; // detect new issues and update caches
 
-	        // Each save results in one of these outcomes:
-	        'resultNoChanges', // upload wasn't attempted since there were no edits
-	        'resultErrors',    // upload failed due to errors
-	        'resultConflicts', // upload failed due to data conflicts
-	        'resultSuccess'    // upload completed without errors
-	    );
+	        var result = validateEntity(entity, graph);
 
-	    var _isSaving = false;
+	        if (result.provisional) {
+	          // provisional result
+	          cache.provisionalEntityIDs.add(entityID); // we'll need to revalidate this entity again later
+	        }
 
-	    var _conflicts = [];
-	    var _errors = [];
-	    var _origChanges;
+	        cache.cacheIssues(result.issues); // update cache
+	      };
+	    }).filter(Boolean); // Perform the work in chunks.
+	    // Because this will happen during idle callbacks, we want to choose a chunk size
+	    // that won't make the browser stutter too badly.
+
+	    cache.queue = cache.queue.concat(utilArrayChunk(jobs, 100)); // Perform the work
+
+	    if (cache.queuePromise) return cache.queuePromise;
+	    cache.queuePromise = processQueue(cache).then(function () {
+	      return revalidateProvisionalEntities(cache);
+	    })["catch"](function () {
+	      /* ignore */
+	    })["finally"](function () {
+	      return cache.queuePromise = null;
+	    });
+	    return cache.queuePromise;
+	  } // `revalidateProvisionalEntities()`   (private)
+	  // Sometimes a validator will return a "provisional" result.
+	  // In this situation, we'll need to revalidate the entity later.
+	  // This function waits a delay, then places them back into the validation queue.
+	  //
+	  // Arguments
+	  //   `cache` - The cache (_headCache or _baseCache)
+	  //
 
-	    var _discardTags = {};
-	    _mainFileFetcher.get('discarded')
-	        .then(function(d) { _discardTags = d; })
-	        .catch(function() { /* ignore */ });
 
-	    var uploader = utilRebind({}, dispatch$1, 'on');
+	  function revalidateProvisionalEntities(cache) {
+	    if (!cache.provisionalEntityIDs.size) return; // nothing to do
 
-	    uploader.isSaving = function() {
-	        return _isSaving;
-	    };
+	    var handle = window.setTimeout(function () {
+	      _deferredST["delete"](handle);
 
-	    uploader.save = function(changeset, tryAgain, checkConflicts) {
-	        // Guard against accidentally entering save code twice - #4641
-	        if (_isSaving && !tryAgain) {
-	            return;
-	        }
+	      if (!cache.provisionalEntityIDs.size) return; // nothing to do
+
+	      validateEntitiesAsync(Array.from(cache.provisionalEntityIDs), cache);
+	    }, RETRY);
+
+	    _deferredST.add(handle);
+	  } // `processQueue(queue)`   (private)
+	  // Process the next chunk of deferred validation work
+	  //
+	  // Arguments
+	  //   `cache` - The cache (_headCache or _baseCache)
+	  //
+	  // Returns
+	  //   A Promise fulfilled when the validation has completed.
+	  //   This may take time but happen in the background during browser idle time.
+	  //
+
+
+	  function processQueue(cache) {
+	    // console.log(`${cache.which} queue length ${cache.queue.length}`);
+	    if (!cache.queue.length) return Promise.resolve(); // we're done
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	    var chunk = cache.queue.pop();
+	    return new Promise(function (resolvePromise) {
+	      var handle = window.requestIdleCallback(function () {
+	        _deferredRIC["delete"](handle); // const t0 = performance.now();
 
-	        // If user somehow got logged out mid-save, try to reauthenticate..
-	        // This can happen if they were logged in from before, but the tokens are no longer valid.
-	        if (!osm.authenticated()) {
-	            osm.authenticate(function(err) {
-	                if (!err) {
-	                    uploader.save(changeset, tryAgain, checkConflicts);  // continue where we left off..
-	                }
-	            });
-	            return;
-	        }
 
-	        if (!_isSaving) {
-	            _isSaving = true;
-	            dispatch$1.call('saveStarted', this);
-	        }
+	        chunk.forEach(function (job) {
+	          return job();
+	        }); // const t1 = performance.now();
+	        // console.log('chunk processed in ' + (t1 - t0) + ' ms');
 
-	        var history = context.history();
+	        resolvePromise();
+	      });
 
-	        _conflicts = [];
-	        _errors = [];
+	      _deferredRIC.add(handle);
+	    }).then(function () {
+	      // dispatch an event sometimes to redraw various UI things
+	      if (cache.queue.length % 25 === 0) dispatch.call('validated');
+	    }).then(function () {
+	      return processQueue(cache);
+	    });
+	  }
 
-	        // Store original changes, in case user wants to download them as an .osc file
-	        _origChanges = history.changes(actionDiscardTags(history.difference(), _discardTags));
+	  return validator;
+	} // `validationCache()`   (private)
+	// Creates a cache to store validation state
+	// We create 2 of these:
+	//   `_baseCache` for validation on the base graph (unedited)
+	//   `_headCache` for validation on the head graph (user edits applied)
+	//
+	// Arguments
+	//   `which` - just a String 'base' or 'head' to keep track of it
+	//
 
-	        // First time, `history.perform` a no-op action.
-	        // Any conflict resolutions will be done as `history.replace`
-	        // Remember to pop this later if needed
-	        if (!tryAgain) {
-	            history.perform(actionNoop());
-	        }
+	function validationCache(which) {
+	  var cache = {
+	    which: which,
+	    graph: null,
+	    queue: [],
+	    queuePromise: null,
+	    queuedEntityIDs: new Set(),
+	    provisionalEntityIDs: new Set(),
+	    issuesByIssueID: {},
+	    // issue.id -> issue
+	    issuesByEntityID: {} // entity.id -> Set(issue.id)
 
-	        // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
-	        if (!checkConflicts) {
-	            upload(changeset);
+	  };
 
-	        // Do the full (slow) conflict check..
-	        } else {
-	            performFullConflictCheck(changeset);
-	        }
+	  cache.cacheIssue = function (issue) {
+	    (issue.entityIds || []).forEach(function (entityID) {
+	      if (!cache.issuesByEntityID[entityID]) {
+	        cache.issuesByEntityID[entityID] = new Set();
+	      }
 
-	    };
+	      cache.issuesByEntityID[entityID].add(issue.id);
+	    });
+	    cache.issuesByIssueID[issue.id] = issue;
+	  };
 
+	  cache.uncacheIssue = function (issue) {
+	    (issue.entityIds || []).forEach(function (entityID) {
+	      if (cache.issuesByEntityID[entityID]) {
+	        cache.issuesByEntityID[entityID]["delete"](issue.id);
+	      }
+	    });
+	    delete cache.issuesByIssueID[issue.id];
+	  };
 
-	    function performFullConflictCheck(changeset) {
+	  cache.cacheIssues = function (issues) {
+	    issues.forEach(cache.cacheIssue);
+	  };
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	  cache.uncacheIssues = function (issues) {
+	    issues.forEach(cache.uncacheIssue);
+	  };
 
-	        var history = context.history();
+	  cache.uncacheIssuesOfType = function (type) {
+	    var issuesOfType = Object.values(cache.issuesByIssueID).filter(function (issue) {
+	      return issue.type === type;
+	    });
+	    cache.uncacheIssues(issuesOfType);
+	  }; // Remove a single entity and all its related issues from the caches
 
-	        var localGraph = context.graph();
-	        var remoteGraph = coreGraph(history.base(), true);
 
-	        var summary = history.difference().summary();
-	        var _toCheck = [];
-	        for (var i = 0; i < summary.length; i++) {
-	            var item = summary[i];
-	            if (item.changeType === 'modified') {
-	                _toCheck.push(item.entity.id);
-	            }
-	        }
+	  cache.uncacheEntityID = function (entityID) {
+	    var entityIssueIDs = cache.issuesByEntityID[entityID];
 
-	        var _toLoad = withChildNodes(_toCheck, localGraph);
-	        var _loaded = {};
-	        var _toLoadCount = 0;
-	        var _toLoadTotal = _toLoad.length;
+	    if (entityIssueIDs) {
+	      entityIssueIDs.forEach(function (issueID) {
+	        var issue = cache.issuesByIssueID[issueID];
 
-	        if (_toCheck.length) {
-	            dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
-	            _toLoad.forEach(function(id) { _loaded[id] = false; });
-	            osm.loadMultiple(_toLoad, loaded);
+	        if (issue) {
+	          cache.uncacheIssue(issue);
 	        } else {
-	            upload(changeset);
+	          // shouldn't happen, clean up
+	          delete cache.issuesByIssueID[issueID];
 	        }
+	      });
+	    }
 
-	        return;
+	    delete cache.issuesByEntityID[entityID];
+	    cache.provisionalEntityIDs["delete"](entityID);
+	  }; // Return the expandeded set of entityIDs related to issues for the given entityIDs
+	  //
+	  // Arguments
+	  //   `entityIDs` - Array or Set containing entityIDs.
+	  //
 
-	        function withChildNodes(ids, graph) {
-	            var s = new Set(ids);
-	            ids.forEach(function(id) {
-	                var entity = graph.entity(id);
-	                if (entity.type !== 'way') { return; }
 
-	                graph.childNodes(entity).forEach(function(child) {
-	                    if (child.version !== undefined) {
-	                        s.add(child.id);
-	                    }
-	                });
+	  cache.withAllRelatedEntities = function (entityIDs) {
+	    var result = new Set();
+	    (entityIDs || []).forEach(function (entityID) {
+	      result.add(entityID); // include self
+
+	      var entityIssueIDs = cache.issuesByEntityID[entityID];
+
+	      if (entityIssueIDs) {
+	        entityIssueIDs.forEach(function (issueID) {
+	          var issue = cache.issuesByIssueID[issueID];
+
+	          if (issue) {
+	            (issue.entityIds || []).forEach(function (relatedID) {
+	              return result.add(relatedID);
 	            });
+	          } else {
+	            // shouldn't happen, clean up
+	            delete cache.issuesByIssueID[issueID];
+	          }
+	        });
+	      }
+	    });
+	    return result;
+	  };
 
-	            return Array.from(s);
-	        }
+	  return cache;
+	}
 
+	function coreUploader(context) {
+	  var dispatch = dispatch$8( // Start and end events are dispatched exactly once each per legitimate outside call to `save`
+	  'saveStarted', // dispatched as soon as a call to `save` has been deemed legitimate
+	  'saveEnded', // dispatched after the result event has been dispatched
+	  'willAttemptUpload', // dispatched before the actual upload call occurs, if it will
+	  'progressChanged', // Each save results in one of these outcomes:
+	  'resultNoChanges', // upload wasn't attempted since there were no edits
+	  'resultErrors', // upload failed due to errors
+	  'resultConflicts', // upload failed due to data conflicts
+	  'resultSuccess' // upload completed without errors
+	  );
+	  var _isSaving = false;
+	  var _conflicts = [];
+	  var _errors = [];
 
-	        // Reload modified entities into an alternate graph and check for conflicts..
-	        function loaded(err, result) {
-	            if (_errors.length) { return; }
+	  var _origChanges;
 
-	            if (err) {
-	                _errors.push({
-	                    msg: err.message || err.responseText,
-	                    details: [ _t('save.status_code', { code: err.status }) ]
-	                });
-	                didResultInErrors();
+	  var _discardTags = {};
+	  _mainFileFetcher.get('discarded').then(function (d) {
+	    _discardTags = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  });
+	  var uploader = utilRebind({}, dispatch, 'on');
 
-	            } else {
-	                var loadMore = [];
-
-	                result.data.forEach(function(entity) {
-	                    remoteGraph.replace(entity);
-	                    _loaded[entity.id] = true;
-	                    _toLoad = _toLoad.filter(function(val) { return val !== entity.id; });
-
-	                    if (!entity.visible) { return; }
-
-	                    // Because loadMultiple doesn't download /full like loadEntity,
-	                    // need to also load children that aren't already being checked..
-	                    var i, id;
-	                    if (entity.type === 'way') {
-	                        for (i = 0; i < entity.nodes.length; i++) {
-	                            id = entity.nodes[i];
-	                            if (_loaded[id] === undefined) {
-	                                _loaded[id] = false;
-	                                loadMore.push(id);
-	                            }
-	                        }
-	                    } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-	                        for (i = 0; i < entity.members.length; i++) {
-	                            id = entity.members[i].id;
-	                            if (_loaded[id] === undefined) {
-	                                _loaded[id] = false;
-	                                loadMore.push(id);
-	                            }
-	                        }
-	                    }
-	                });
+	  uploader.isSaving = function () {
+	    return _isSaving;
+	  };
 
-	                _toLoadCount += result.data.length;
-	                _toLoadTotal += loadMore.length;
-	                dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
+	  uploader.save = function (changeset, tryAgain, checkConflicts) {
+	    // Guard against accidentally entering save code twice - #4641
+	    if (_isSaving && !tryAgain) {
+	      return;
+	    }
 
-	                if (loadMore.length) {
-	                    _toLoad.push.apply(_toLoad, loadMore);
-	                    osm.loadMultiple(loadMore, loaded);
-	                }
+	    var osm = context.connection();
+	    if (!osm) return; // If user somehow got logged out mid-save, try to reauthenticate..
+	    // This can happen if they were logged in from before, but the tokens are no longer valid.
 
-	                if (!_toLoad.length) {
-	                    detectConflicts();
-	                    upload(changeset);
-	                }
-	            }
+	    if (!osm.authenticated()) {
+	      osm.authenticate(function (err) {
+	        if (!err) {
+	          uploader.save(changeset, tryAgain, checkConflicts); // continue where we left off..
 	        }
+	      });
+	      return;
+	    }
 
+	    if (!_isSaving) {
+	      _isSaving = true;
+	      dispatch.call('saveStarted', this);
+	    }
 
-	        function detectConflicts() {
-	            function choice(id, text, action) {
-	                return {
-	                    id: id,
-	                    text: text,
-	                    action: function() {
-	                        history.replace(action);
-	                    }
-	                };
-	            }
-	            function formatUser(d) {
-	                return '<a href="' + osm.userURL(d) + '" target="_blank">' + d + '</a>';
-	            }
-	            function entityName(entity) {
-	                return utilDisplayName(entity) || (utilDisplayType(entity.id) + ' ' + entity.id);
-	            }
+	    var history = context.history();
+	    _conflicts = [];
+	    _errors = []; // Store original changes, in case user wants to download them as an .osc file
 
-	            function sameVersions(local, remote) {
-	                if (local.version !== remote.version) { return false; }
+	    _origChanges = history.changes(actionDiscardTags(history.difference(), _discardTags)); // First time, `history.perform` a no-op action.
+	    // Any conflict resolutions will be done as `history.replace`
+	    // Remember to pop this later if needed
 
-	                if (local.type === 'way') {
-	                    var children = utilArrayUnion(local.nodes, remote.nodes);
-	                    for (var i = 0; i < children.length; i++) {
-	                        var a = localGraph.hasEntity(children[i]);
-	                        var b = remoteGraph.hasEntity(children[i]);
-	                        if (a && b && a.version !== b.version) { return false; }
-	                    }
-	                }
+	    if (!tryAgain) {
+	      history.perform(actionNoop());
+	    } // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
 
-	                return true;
-	            }
 
-	            _toCheck.forEach(function(id) {
-	                var local = localGraph.entity(id);
-	                var remote = remoteGraph.entity(id);
+	    if (!checkConflicts) {
+	      upload(changeset); // Do the full (slow) conflict check..
+	    } else {
+	      performFullConflictCheck(changeset);
+	    }
+	  };
+
+	  function performFullConflictCheck(changeset) {
+	    var osm = context.connection();
+	    if (!osm) return;
+	    var history = context.history();
+	    var localGraph = context.graph();
+	    var remoteGraph = coreGraph(history.base(), true);
+	    var summary = history.difference().summary();
+	    var _toCheck = [];
+
+	    for (var i = 0; i < summary.length; i++) {
+	      var item = summary[i];
 
-	                if (sameVersions(local, remote)) { return; }
+	      if (item.changeType === 'modified') {
+	        _toCheck.push(item.entity.id);
+	      }
+	    }
 
-	                var merge = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags, formatUser);
+	    var _toLoad = withChildNodes(_toCheck, localGraph);
 
-	                history.replace(merge);
+	    var _loaded = {};
+	    var _toLoadCount = 0;
+	    var _toLoadTotal = _toLoad.length;
 
-	                var mergeConflicts = merge.conflicts();
-	                if (!mergeConflicts.length) { return; }  // merged safely
+	    if (_toCheck.length) {
+	      dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);
 
-	                var forceLocal = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_local');
-	                var forceRemote = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_remote');
-	                var keepMine = _t('save.conflict.' + (remote.visible ? 'keep_local' : 'restore'));
-	                var keepTheirs = _t('save.conflict.' + (remote.visible ? 'keep_remote' : 'delete'));
+	      _toLoad.forEach(function (id) {
+	        _loaded[id] = false;
+	      });
 
-	                _conflicts.push({
-	                    id: id,
-	                    name: entityName(local),
-	                    details: mergeConflicts,
-	                    chosen: 1,
-	                    choices: [
-	                        choice(id, keepMine, forceLocal),
-	                        choice(id, keepTheirs, forceRemote)
-	                    ]
-	                });
-	            });
-	        }
+	      osm.loadMultiple(_toLoad, loaded);
+	    } else {
+	      upload(changeset);
 	    }
 
+	    return;
 
-	    function upload(changeset) {
-	        var osm = context.connection();
-	        if (!osm) {
-	            _errors.push({ msg: 'No OSM Service' });
-	        }
+	    function withChildNodes(ids, graph) {
+	      var s = new Set(ids);
+	      ids.forEach(function (id) {
+	        var entity = graph.entity(id);
+	        if (entity.type !== 'way') return;
+	        graph.childNodes(entity).forEach(function (child) {
+	          if (child.version !== undefined) {
+	            s.add(child.id);
+	          }
+	        });
+	      });
+	      return Array.from(s);
+	    } // Reload modified entities into an alternate graph and check for conflicts..
 
-	        if (_conflicts.length) {
-	            didResultInConflicts(changeset);
 
-	        } else if (_errors.length) {
-	            didResultInErrors();
+	    function loaded(err, result) {
+	      if (_errors.length) return;
 
-	        } else {
-	            var history = context.history();
-	            var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
-	            if (changes.modified.length || changes.created.length || changes.deleted.length) {
+	      if (err) {
+	        _errors.push({
+	          msg: err.message || err.responseText,
+	          details: [_t('save.status_code', {
+	            code: err.status
+	          })]
+	        });
 
-	                dispatch$1.call('willAttemptUpload', this);
+	        didResultInErrors();
+	      } else {
+	        var loadMore = [];
+	        result.data.forEach(function (entity) {
+	          remoteGraph.replace(entity);
+	          _loaded[entity.id] = true;
+	          _toLoad = _toLoad.filter(function (val) {
+	            return val !== entity.id;
+	          });
+	          if (!entity.visible) return; // Because loadMultiple doesn't download /full like loadEntity,
+	          // need to also load children that aren't already being checked..
 
-	                osm.putChangeset(changeset, changes, uploadCallback);
+	          var i, id;
 
-	            } else {
-	                // changes were insignificant or reverted by user
-	                didResultInNoChanges();
-	            }
-	        }
-	    }
+	          if (entity.type === 'way') {
+	            for (i = 0; i < entity.nodes.length; i++) {
+	              id = entity.nodes[i];
 
+	              if (_loaded[id] === undefined) {
+	                _loaded[id] = false;
+	                loadMore.push(id);
+	              }
+	            }
+	          } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+	            for (i = 0; i < entity.members.length; i++) {
+	              id = entity.members[i].id;
 
-	    function uploadCallback(err, changeset) {
-	        if (err) {
-	            if (err.status === 409) {  // 409 Conflict
-	                uploader.save(changeset, true, true);  // tryAgain = true, checkConflicts = true
-	            } else {
-	                _errors.push({
-	                    msg: err.message || err.responseText,
-	                    details: [ _t('save.status_code', { code: err.status }) ]
-	                });
-	                didResultInErrors();
+	              if (_loaded[id] === undefined) {
+	                _loaded[id] = false;
+	                loadMore.push(id);
+	              }
 	            }
+	          }
+	        });
+	        _toLoadCount += result.data.length;
+	        _toLoadTotal += loadMore.length;
+	        dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);
 
-	        } else {
-	            didResultInSuccess(changeset);
+	        if (loadMore.length) {
+	          _toLoad.push.apply(_toLoad, loadMore);
+
+	          osm.loadMultiple(loadMore, loaded);
+	        }
+
+	        if (!_toLoad.length) {
+	          detectConflicts();
+	          upload(changeset);
 	        }
+	      }
 	    }
 
-	    function didResultInNoChanges() {
+	    function detectConflicts() {
+	      function choice(id, text, _action) {
+	        return {
+	          id: id,
+	          text: text,
+	          action: function action() {
+	            history.replace(_action);
+	          }
+	        };
+	      }
 
-	        dispatch$1.call('resultNoChanges', this);
+	      function formatUser(d) {
+	        return '<a href="' + osm.userURL(d) + '" target="_blank">' + escape$4(d) + '</a>';
+	      }
 
-	        endSave();
+	      function entityName(entity) {
+	        return utilDisplayName(entity) || utilDisplayType(entity.id) + ' ' + entity.id;
+	      }
 
-	        context.flush(); // reset iD
-	    }
+	      function sameVersions(local, remote) {
+	        if (local.version !== remote.version) return false;
 
-	    function didResultInErrors() {
+	        if (local.type === 'way') {
+	          var children = utilArrayUnion(local.nodes, remote.nodes);
 
-	        context.history().pop();
+	          for (var i = 0; i < children.length; i++) {
+	            var a = localGraph.hasEntity(children[i]);
+	            var b = remoteGraph.hasEntity(children[i]);
+	            if (a && b && a.version !== b.version) return false;
+	          }
+	        }
 
-	        dispatch$1.call('resultErrors', this, _errors);
+	        return true;
+	      }
 
-	        endSave();
+	      _toCheck.forEach(function (id) {
+	        var local = localGraph.entity(id);
+	        var remote = remoteGraph.entity(id);
+	        if (sameVersions(local, remote)) return;
+	        var merge = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags, formatUser);
+	        history.replace(merge);
+	        var mergeConflicts = merge.conflicts();
+	        if (!mergeConflicts.length) return; // merged safely
+
+	        var forceLocal = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_local');
+	        var forceRemote = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_remote');
+	        var keepMine = _t('save.conflict.' + (remote.visible ? 'keep_local' : 'restore'));
+	        var keepTheirs = _t('save.conflict.' + (remote.visible ? 'keep_remote' : 'delete'));
+
+	        _conflicts.push({
+	          id: id,
+	          name: entityName(local),
+	          details: mergeConflicts,
+	          chosen: 1,
+	          choices: [choice(id, keepMine, forceLocal), choice(id, keepTheirs, forceRemote)]
+	        });
+	      });
 	    }
+	  }
 
+	  function upload(changeset) {
+	    var osm = context.connection();
 
-	    function didResultInConflicts(changeset) {
-
-	        _conflicts.sort(function(a, b) { return b.id.localeCompare(a.id); });
+	    if (!osm) {
+	      _errors.push({
+	        msg: 'No OSM Service'
+	      });
+	    }
 
-	        dispatch$1.call('resultConflicts', this, changeset, _conflicts, _origChanges);
+	    if (_conflicts.length) {
+	      didResultInConflicts(changeset);
+	    } else if (_errors.length) {
+	      didResultInErrors();
+	    } else {
+	      var history = context.history();
+	      var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
 
-	        endSave();
+	      if (changes.modified.length || changes.created.length || changes.deleted.length) {
+	        dispatch.call('willAttemptUpload', this);
+	        osm.putChangeset(changeset, changes, uploadCallback);
+	      } else {
+	        // changes were insignificant or reverted by user
+	        didResultInNoChanges();
+	      }
 	    }
+	  }
 
+	  function uploadCallback(err, changeset) {
+	    if (err) {
+	      if (err.status === 409) {
+	        // 409 Conflict
+	        uploader.save(changeset, true, true); // tryAgain = true, checkConflicts = true
+	      } else {
+	        _errors.push({
+	          msg: err.message || err.responseText,
+	          details: [_t('save.status_code', {
+	            code: err.status
+	          })]
+	        });
 
-	    function didResultInSuccess(changeset) {
-
-	        // delete the edit stack cached to local storage
-	        context.history().clearSaved();
+	        didResultInErrors();
+	      }
+	    } else {
+	      didResultInSuccess(changeset);
+	    }
+	  }
 
-	        dispatch$1.call('resultSuccess', this, changeset);
+	  function didResultInNoChanges() {
+	    dispatch.call('resultNoChanges', this);
+	    endSave();
+	    context.flush(); // reset iD
+	  }
 
-	        // Add delay to allow for postgres replication #1646 #2678
-	        window.setTimeout(function() {
+	  function didResultInErrors() {
+	    context.history().pop();
+	    dispatch.call('resultErrors', this, _errors);
+	    endSave();
+	  }
 
-	            endSave();
+	  function didResultInConflicts(changeset) {
+	    _conflicts.sort(function (a, b) {
+	      return b.id.localeCompare(a.id);
+	    });
 
-	            context.flush(); // reset iD
-	        }, 2500);
-	    }
+	    dispatch.call('resultConflicts', this, changeset, _conflicts, _origChanges);
+	    endSave();
+	  }
 
+	  function didResultInSuccess(changeset) {
+	    // delete the edit stack cached to local storage
+	    context.history().clearSaved();
+	    dispatch.call('resultSuccess', this, changeset); // Add delay to allow for postgres replication #1646 #2678
 
-	    function endSave() {
-	        _isSaving = false;
+	    window.setTimeout(function () {
+	      endSave();
+	      context.flush(); // reset iD
+	    }, 2500);
+	  }
 
-	        dispatch$1.call('saveEnded', this);
-	    }
+	  function endSave() {
+	    _isSaving = false;
+	    dispatch.call('saveEnded', this);
+	  }
 
+	  uploader.cancelConflictResolution = function () {
+	    context.history().pop();
+	  };
 
-	    uploader.cancelConflictResolution = function() {
-	        context.history().pop();
-	    };
+	  uploader.processResolvedConflicts = function (changeset) {
+	    var history = context.history();
 
+	    for (var i = 0; i < _conflicts.length; i++) {
+	      if (_conflicts[i].chosen === 1) {
+	        // user chose "use theirs"
+	        var entity = context.hasEntity(_conflicts[i].id);
 
-	    uploader.processResolvedConflicts = function(changeset) {
-	        var history = context.history();
+	        if (entity && entity.type === 'way') {
+	          var children = utilArrayUniq(entity.nodes);
 
-	        for (var i = 0; i < _conflicts.length; i++) {
-	            if (_conflicts[i].chosen === 1) {  // user chose "use theirs"
-	                var entity = context.hasEntity(_conflicts[i].id);
-	                if (entity && entity.type === 'way') {
-	                    var children = utilArrayUniq(entity.nodes);
-	                    for (var j = 0; j < children.length; j++) {
-	                        history.replace(actionRevert(children[j]));
-	                    }
-	                }
-	                history.replace(actionRevert(_conflicts[i].id));
-	            }
+	          for (var j = 0; j < children.length; j++) {
+	            history.replace(actionRevert(children[j]));
+	          }
 	        }
 
-	        uploader.save(changeset, true, false);  // tryAgain = true, checkConflicts = false
-	    };
-
-
-	    uploader.reset = function() {
+	        history.replace(actionRevert(_conflicts[i].id));
+	      }
+	    }
 
-	    };
+	    uploader.save(changeset, true, false); // tryAgain = true, checkConflicts = false
+	  };
 
+	  uploader.reset = function () {};
 
-	    return uploader;
+	  return uploader;
 	}
 
-	var isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
+	var $$2 = _export;
+	var fails = fails$V;
+	var expm1 = mathExpm1;
+
+	var abs = Math.abs;
+	var exp = Math.exp;
+	var E = Math.E;
 
-	// listen for DPI change, e.g. when dragging a browser window from a retina to non-retina screen
-	window.matchMedia("\n        (-webkit-min-device-pixel-ratio: 2), /* Safari */\n        (min-resolution: 2dppx),             /* standard */\n        (min-resolution: 192dpi)             /* fallback */\n    ").addListener(function() {
+	var FORCED = fails(function () {
+	  // eslint-disable-next-line es/no-math-sinh -- required for testing
+	  return Math.sinh(-2e-17) != -2e-17;
+	});
 
-	    isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
+	// `Math.sinh` method
+	// https://tc39.es/ecma262/#sec-math.sinh
+	// V8 near Chromium 38 has a problem with very small numbers
+	$$2({ target: 'Math', stat: true, forced: FORCED }, {
+	  sinh: function sinh(x) {
+	    return abs(x = +x) < 1 ? (expm1(x) - expm1(-x)) / 2 : (exp(x - 1) - exp(-x - 1)) * (E / 2);
+	  }
 	});
 
+	var isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2; // listen for DPI change, e.g. when dragging a browser window from a retina to non-retina screen
+
+	window.matchMedia("\n        (-webkit-min-device-pixel-ratio: 2), /* Safari */\n        (min-resolution: 2dppx),             /* standard */\n        (min-resolution: 192dpi)             /* fallback */\n    ").addListener(function () {
+	  isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
+	});
 
 	function localeDateString(s) {
-	    if (!s) { return null; }
-	    var options = { day: 'numeric', month: 'short', year: 'numeric' };
-	    var d = new Date(s);
-	    if (isNaN(d.getTime())) { return null; }
-	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	  if (!s) return null;
+	  var options = {
+	    day: 'numeric',
+	    month: 'short',
+	    year: 'numeric'
+	  };
+	  var d = new Date(s);
+	  if (isNaN(d.getTime())) return null;
+	  return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
 	}
 
 	function vintageRange(vintage) {
-	    var s;
-	    if (vintage.start || vintage.end) {
-	        s = (vintage.start || '?');
-	        if (vintage.start !== vintage.end) {
-	            s += ' - ' + (vintage.end || '?');
-	        }
-	    }
-	    return s;
-	}
+	  var s;
 
+	  if (vintage.start || vintage.end) {
+	    s = vintage.start || '?';
 
-	function rendererBackgroundSource(data) {
-	    var source = Object.assign({}, data);   // shallow copy
-	    var _offset = [0, 0];
-	    var _name = source.name;
-	    var _description = source.description;
-	    var _best = !!source.best;
-	    var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
-
-	    source.tileSize = data.tileSize || 256;
-	    source.zoomExtent = data.zoomExtent || [0, 22];
-	    source.overzoom = data.overzoom !== false;
-
-	    source.offset = function(val) {
-	        if (!arguments.length) { return _offset; }
-	        _offset = val;
-	        return source;
-	    };
+	    if (vintage.start !== vintage.end) {
+	      s += ' - ' + (vintage.end || '?');
+	    }
+	  }
 
+	  return s;
+	}
 
-	    source.nudge = function(val, zoomlevel) {
-	        _offset[0] += val[0] / Math.pow(2, zoomlevel);
-	        _offset[1] += val[1] / Math.pow(2, zoomlevel);
-	        return source;
-	    };
+	function rendererBackgroundSource(data) {
+	  var source = Object.assign({}, data); // shallow copy
 
+	  var _offset = [0, 0];
+	  var _name = source.name;
+	  var _description = source.description;
 
-	    source.name = function() {
-	        var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-	        return _t('imagery.' + id_safe + '.name', { default: _name });
-	    };
+	  var _best = !!source.best;
 
+	  var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
 
-	    source.description = function() {
-	        var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-	        return _t('imagery.' + id_safe + '.description', { default: _description });
-	    };
+	  source.tileSize = data.tileSize || 256;
+	  source.zoomExtent = data.zoomExtent || [0, 22];
+	  source.overzoom = data.overzoom !== false;
 
+	  source.offset = function (val) {
+	    if (!arguments.length) return _offset;
+	    _offset = val;
+	    return source;
+	  };
 
-	    source.best = function() {
-	        return _best;
-	    };
+	  source.nudge = function (val, zoomlevel) {
+	    _offset[0] += val[0] / Math.pow(2, zoomlevel);
+	    _offset[1] += val[1] / Math.pow(2, zoomlevel);
+	    return source;
+	  };
 
+	  source.name = function () {
+	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+	    return _t('imagery.' + id_safe + '.name', {
+	      "default": lodash.exports.escape(_name)
+	    });
+	  };
 
-	    source.area = function() {
-	        if (!data.polygon) { return Number.MAX_VALUE; }  // worldwide
-	        var area = d3_geoArea({ type: 'MultiPolygon', coordinates: [ data.polygon ] });
-	        return isNaN(area) ? 0 : area;
-	    };
+	  source.label = function () {
+	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+	    return _t.html('imagery.' + id_safe + '.name', {
+	      "default": lodash.exports.escape(_name)
+	    });
+	  };
 
+	  source.description = function () {
+	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+	    return _t.html('imagery.' + id_safe + '.description', {
+	      "default": lodash.exports.escape(_description)
+	    });
+	  };
 
-	    source.imageryUsed = function() {
-	        return name || source.id;
-	    };
+	  source.best = function () {
+	    return _best;
+	  };
 
+	  source.area = function () {
+	    if (!data.polygon) return Number.MAX_VALUE; // worldwide
 
-	    source.template = function(val) {
-	        if (!arguments.length) { return _template; }
-	        if (source.id === 'custom') {
-	            _template = val;
-	        }
-	        return source;
-	    };
+	    var area = d3_geoArea({
+	      type: 'MultiPolygon',
+	      coordinates: [data.polygon]
+	    });
+	    return isNaN(area) ? 0 : area;
+	  };
 
+	  source.imageryUsed = function () {
+	    return _name || source.id;
+	  };
 
-	    source.url = function(coord) {
-	        var result = _template;
-	        if (result === '') { return result; }   // source 'none'
+	  source.template = function (val) {
+	    if (!arguments.length) return _template;
 
+	    if (source.id === 'custom' || source.id === 'Bing') {
+	      _template = val;
+	    }
 
-	        // Guess a type based on the tokens present in the template
-	        // (This is for 'custom' source, where we don't know)
-	        if (!source.type) {
-	            if (/\{(proj|wkid|bbox)\}/.test(_template)) {
-	                source.type = 'wms';
-	                source.projection = 'EPSG:3857';  // guess
-	            } else if (/\{(x|y)\}/.test(_template)) {
-	                source.type = 'tms';
-	            } else if (/\{u\}/.test(_template)) {
-	                source.type = 'bing';
-	            }
-	        }
+	    return source;
+	  };
 
+	  source.url = function (coord) {
+	    var result = _template;
+	    if (result === '') return result; // source 'none'
+	    // Guess a type based on the tokens present in the template
+	    // (This is for 'custom' source, where we don't know)
+
+	    if (!source.type || source.id === 'custom') {
+	      if (/SERVICE=WMS|\{(proj|wkid|bbox)\}/.test(_template)) {
+	        source.type = 'wms';
+	        source.projection = 'EPSG:3857'; // guess
+	      } else if (/\{(x|y)\}/.test(_template)) {
+	        source.type = 'tms';
+	      } else if (/\{u\}/.test(_template)) {
+	        source.type = 'bing';
+	      }
+	    }
 
-	        if (source.type === 'wms') {
-	            var tileToProjectedCoords = (function(x, y, z) {
-	                //polyfill for IE11, PhantomJS
-	                var sinh = Math.sinh || function(x) {
-	                    var y = Math.exp(x);
-	                    return (y - 1 / y) / 2;
-	                };
+	    if (source.type === 'wms') {
+	      var tileToProjectedCoords = function tileToProjectedCoords(x, y, z) {
+	        //polyfill for IE11, PhantomJS
+	        var sinh = Math.sinh || function (x) {
+	          var y = Math.exp(x);
+	          return (y - 1 / y) / 2;
+	        };
 
-	                var zoomSize = Math.pow(2, z);
-	                var lon = x / zoomSize * Math.PI * 2 - Math.PI;
-	                var lat = Math.atan(sinh(Math.PI * (1 - 2 * y / zoomSize)));
-
-	                switch (source.projection) {
-	                    case 'EPSG:4326':
-	                        return {
-	                            x: lon * 180 / Math.PI,
-	                            y: lat * 180 / Math.PI
-	                        };
-	                    default: // EPSG:3857 and synonyms
-	                        var mercCoords = mercatorRaw(lon, lat);
-	                        return {
-	                            x: 20037508.34 / Math.PI * mercCoords[0],
-	                            y: 20037508.34 / Math.PI * mercCoords[1]
-	                        };
-	                }
-	            });
+	        var zoomSize = Math.pow(2, z);
+	        var lon = x / zoomSize * Math.PI * 2 - Math.PI;
+	        var lat = Math.atan(sinh(Math.PI * (1 - 2 * y / zoomSize)));
 
-	            var tileSize = source.tileSize;
-	            var projection = source.projection;
-	            var minXmaxY = tileToProjectedCoords(coord[0], coord[1], coord[2]);
-	            var maxXminY = tileToProjectedCoords(coord[0]+1, coord[1]+1, coord[2]);
-
-	            result = result.replace(/\{(\w+)\}/g, function (token, key) {
-	              switch (key) {
-	                case 'width':
-	                case 'height':
-	                  return tileSize;
-	                case 'proj':
-	                  return projection;
-	                case 'wkid':
-	                  return projection.replace(/^EPSG:/, '');
-	                case 'bbox':
-	                  return minXmaxY.x + ',' + maxXminY.y + ',' + maxXminY.x + ',' + minXmaxY.y;
-	                case 'w':
-	                  return minXmaxY.x;
-	                case 's':
-	                  return maxXminY.y;
-	                case 'n':
-	                  return maxXminY.x;
-	                case 'e':
-	                  return minXmaxY.y;
-	                default:
-	                  return token;
-	              }
-	            });
+	        switch (source.projection) {
+	          case 'EPSG:4326':
+	            return {
+	              x: lon * 180 / Math.PI,
+	              y: lat * 180 / Math.PI
+	            };
 
-	        } else if (source.type === 'tms') {
-	            result = result
-	                .replace('{x}', coord[0])
-	                .replace('{y}', coord[1])
-	                // TMS-flipped y coordinate
-	                .replace(/\{[t-]y\}/, Math.pow(2, coord[2]) - coord[1] - 1)
-	                .replace(/\{z(oom)?\}/, coord[2])
-	                // only fetch retina tiles for retina screens
-	                .replace(/\{@2x\}|\{r\}/, isRetina ? '@2x' : '');
-
-	        } else if (source.type === 'bing') {
-	            result = result
-	                .replace('{u}', function() {
-	                    var u = '';
-	                    for (var zoom = coord[2]; zoom > 0; zoom--) {
-	                        var b = 0;
-	                        var mask = 1 << (zoom - 1);
-	                        if ((coord[0] & mask) !== 0) { b++; }
-	                        if ((coord[1] & mask) !== 0) { b += 2; }
-	                        u += b.toString();
-	                    }
-	                    return u;
-	                });
+	          default:
+	            // EPSG:3857 and synonyms
+	            var mercCoords = mercatorRaw(lon, lat);
+	            return {
+	              x: 20037508.34 / Math.PI * mercCoords[0],
+	              y: 20037508.34 / Math.PI * mercCoords[1]
+	            };
 	        }
+	      };
 
-	        // these apply to any type..
-	        result = result.replace(/\{switch:([^}]+)\}/, function(s, r) {
-	            var subdomains = r.split(',');
-	            return subdomains[(coord[0] + coord[1]) % subdomains.length];
-	        });
+	      var tileSize = source.tileSize;
+	      var projection = source.projection;
+	      var minXmaxY = tileToProjectedCoords(coord[0], coord[1], coord[2]);
+	      var maxXminY = tileToProjectedCoords(coord[0] + 1, coord[1] + 1, coord[2]);
+	      result = result.replace(/\{(\w+)\}/g, function (token, key) {
+	        switch (key) {
+	          case 'width':
+	          case 'height':
+	            return tileSize;
+
+	          case 'proj':
+	            return projection;
+
+	          case 'wkid':
+	            return projection.replace(/^EPSG:/, '');
+
+	          case 'bbox':
+	            // WMS 1.3 flips x/y for some coordinate systems including EPSG:4326 - #7557
+	            if (projection === 'EPSG:4326' && // The CRS parameter implies version 1.3 (prior versions use SRS)
+	            /VERSION=1.3|CRS={proj}/.test(source.template().toUpperCase())) {
+	              return maxXminY.y + ',' + minXmaxY.x + ',' + minXmaxY.y + ',' + maxXminY.x;
+	            } else {
+	              return minXmaxY.x + ',' + maxXminY.y + ',' + maxXminY.x + ',' + minXmaxY.y;
+	            }
 
+	          case 'w':
+	            return minXmaxY.x;
 
-	        return result;
-	    };
+	          case 's':
+	            return maxXminY.y;
 
+	          case 'n':
+	            return maxXminY.x;
 
-	    source.validZoom = function(z) {
-	        return source.zoomExtent[0] <= z &&
-	            (source.overzoom || source.zoomExtent[1] > z);
-	    };
+	          case 'e':
+	            return minXmaxY.y;
 
+	          default:
+	            return token;
+	        }
+	      });
+	    } else if (source.type === 'tms') {
+	      result = result.replace('{x}', coord[0]).replace('{y}', coord[1]) // TMS-flipped y coordinate
+	      .replace(/\{[t-]y\}/, Math.pow(2, coord[2]) - coord[1] - 1).replace(/\{z(oom)?\}/, coord[2]) // only fetch retina tiles for retina screens
+	      .replace(/\{@2x\}|\{r\}/, isRetina ? '@2x' : '');
+	    } else if (source.type === 'bing') {
+	      result = result.replace('{u}', function () {
+	        var u = '';
+
+	        for (var zoom = coord[2]; zoom > 0; zoom--) {
+	          var b = 0;
+	          var mask = 1 << zoom - 1;
+	          if ((coord[0] & mask) !== 0) b++;
+	          if ((coord[1] & mask) !== 0) b += 2;
+	          u += b.toString();
+	        }
+
+	        return u;
+	      });
+	    } // these apply to any type..
 
-	    source.isLocatorOverlay = function() {
-	        return source.id === 'mapbox_locator_overlay';
-	    };
 
+	    result = result.replace(/\{switch:([^}]+)\}/, function (s, r) {
+	      var subdomains = r.split(',');
+	      return subdomains[(coord[0] + coord[1]) % subdomains.length];
+	    });
+	    return result;
+	  };
 
-	    /* hides a source from the list, but leaves it available for use */
-	    source.isHidden = function() {
-	        return source.id === 'DigitalGlobe-Premium-vintage' ||
-	            source.id === 'DigitalGlobe-Standard-vintage';
-	    };
+	  source.validZoom = function (z) {
+	    return source.zoomExtent[0] <= z && (source.overzoom || source.zoomExtent[1] > z);
+	  };
 
+	  source.isLocatorOverlay = function () {
+	    return source.id === 'mapbox_locator_overlay';
+	  };
+	  /* hides a source from the list, but leaves it available for use */
 
-	    source.copyrightNotices = function() {};
 
+	  source.isHidden = function () {
+	    return source.id === 'DigitalGlobe-Premium-vintage' || source.id === 'DigitalGlobe-Standard-vintage';
+	  };
 
-	    source.getMetadata = function(center, tileCoord, callback) {
-	        var vintage = {
-	            start: localeDateString(source.startDate),
-	            end: localeDateString(source.endDate)
-	        };
-	        vintage.range = vintageRange(vintage);
+	  source.copyrightNotices = function () {};
 
-	        var metadata = { vintage: vintage };
-	        callback(null, metadata);
+	  source.getMetadata = function (center, tileCoord, callback) {
+	    var vintage = {
+	      start: localeDateString(source.startDate),
+	      end: localeDateString(source.endDate)
 	    };
+	    vintage.range = vintageRange(vintage);
+	    var metadata = {
+	      vintage: vintage
+	    };
+	    callback(null, metadata);
+	  };
 
-
-	    return source;
+	  return source;
 	}
 
+	rendererBackgroundSource.Bing = function (data, dispatch) {
+	  // https://docs.microsoft.com/en-us/bingmaps/rest-services/imagery/get-imagery-metadata
+	  // https://docs.microsoft.com/en-us/bingmaps/rest-services/directly-accessing-the-bing-maps-tiles
+	  //fallback url template
+	  data.template = 'https://ecn.t{switch:0,1,2,3}.tiles.virtualearth.net/tiles/a{u}.jpeg?g=587&n=z';
+	  var bing = rendererBackgroundSource(data); //var key = 'Arzdiw4nlOJzRwOz__qailc8NiR31Tt51dN2D7cm57NrnceZnCpgOkmJhNpGoppU'; // P2, JOSM, etc
 
-	rendererBackgroundSource.Bing = function(data, dispatch) {
-	    // http://msdn.microsoft.com/en-us/library/ff701716.aspx
-	    // http://msdn.microsoft.com/en-us/library/ff701701.aspx
+	  var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q'; // iD
 
-	    data.template = 'https://ecn.t{switch:0,1,2,3}.tiles.virtualearth.net/tiles/a{u}.jpeg?g=587&mkt=en-gb&n=z';
+	  /*
+	  missing tile image strictness param (n=)
+	  •	n=f -> (Fail) returns a 404
+	  •	n=z -> (Empty) returns a 200 with 0 bytes (no content)
+	  •	n=t -> (Transparent) returns a 200 with a transparent (png) tile
+	  */
 
-	    var bing = rendererBackgroundSource(data);
-	    // var key = 'Arzdiw4nlOJzRwOz__qailc8NiR31Tt51dN2D7cm57NrnceZnCpgOkmJhNpGoppU'; // P2, JOSM, etc
-	    var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q';    // iD
+	  var strictParam = 'n';
+	  var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial?include=ImageryProviders&uriScheme=https&key=' + key;
+	  var cache = {};
+	  var inflight = {};
+	  var providers = [];
+	  d3_json(url).then(function (json) {
+	    var imageryResource = json.resourceSets[0].resources[0]; //retrieve and prepare up to date imagery template
 
+	    var template = imageryResource.imageUrl; //https://ecn.{subdomain}.tiles.virtualearth.net/tiles/a{quadkey}.jpeg?g=10339
 
-	    var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial?include=ImageryProviders&key=' + key;
-	    var cache = {};
-	    var inflight = {};
-	    var providers = [];
+	    var subDomains = imageryResource.imageUrlSubdomains; //["t0, t1, t2, t3"]
 
-	    d3_json(url)
-	        .then(function(json) {
-	            providers = json.resourceSets[0].resources[0].imageryProviders.map(function(provider) {
-	                return {
-	                    attribution: provider.attribution,
-	                    areas: provider.coverageAreas.map(function(area) {
-	                        return {
-	                            zoom: [area.zoomMin, area.zoomMax],
-	                            extent: geoExtent([area.bbox[1], area.bbox[0]], [area.bbox[3], area.bbox[2]])
-	                        };
-	                    })
-	                };
-	            });
-	            dispatch.call('change');
-	        })
-	        .catch(function() {
-	            /* ignore */
-	        });
+	    var subDomainNumbers = subDomains.map(function (subDomain) {
+	      return subDomain.substring(1);
+	    }).join(',');
+	    template = template.replace('{subdomain}', "t{switch:".concat(subDomainNumbers, "}")).replace('{quadkey}', '{u}');
 
+	    if (!new URLSearchParams(template).has(strictParam)) {
+	      template += "&".concat(strictParam, "=z");
+	    }
 
-	    bing.copyrightNotices = function(zoom, extent) {
-	        zoom = Math.min(zoom, 21);
-	        return providers.filter(function(provider) {
-	            return provider.areas.some(function(area) {
-	                return extent.intersects(area.extent) &&
-	                    area.zoom[0] <= zoom &&
-	                    area.zoom[1] >= zoom;
-	            });
-	        }).map(function(provider) {
-	            return provider.attribution;
-	        }).join(', ');
-	    };
+	    bing.template(template);
+	    providers = imageryResource.imageryProviders.map(function (provider) {
+	      return {
+	        attribution: provider.attribution,
+	        areas: provider.coverageAreas.map(function (area) {
+	          return {
+	            zoom: [area.zoomMin, area.zoomMax],
+	            extent: geoExtent([area.bbox[1], area.bbox[0]], [area.bbox[3], area.bbox[2]])
+	          };
+	        })
+	      };
+	    });
+	    dispatch.call('change');
+	  })["catch"](function () {
+	    /* ignore */
+	  });
 
+	  bing.copyrightNotices = function (zoom, extent) {
+	    zoom = Math.min(zoom, 21);
+	    return providers.filter(function (provider) {
+	      return provider.areas.some(function (area) {
+	        return extent.intersects(area.extent) && area.zoom[0] <= zoom && area.zoom[1] >= zoom;
+	      });
+	    }).map(function (provider) {
+	      return provider.attribution;
+	    }).join(', ');
+	  };
 
-	    bing.getMetadata = function(center, tileCoord, callback) {
-	        var tileID = tileCoord.slice(0, 3).join('/');
-	        var zoom = Math.min(tileCoord[2], 21);
-	        var centerPoint = center[1] + ',' + center[0];  // lat,lng
-	        var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint +
-	                '?zl=' + zoom + '&key=' + key;
+	  bing.getMetadata = function (center, tileCoord, callback) {
+	    var tileID = tileCoord.slice(0, 3).join('/');
+	    var zoom = Math.min(tileCoord[2], 21);
+	    var centerPoint = center[1] + ',' + center[0]; // lat,lng
 
-	        if (inflight[tileID]) { return; }
+	    var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint + '?zl=' + zoom + '&key=' + key;
+	    if (inflight[tileID]) return;
 
-	        if (!cache[tileID]) {
-	            cache[tileID] = {};
-	        }
-	        if (cache[tileID] && cache[tileID].metadata) {
-	            return callback(null, cache[tileID].metadata);
-	        }
+	    if (!cache[tileID]) {
+	      cache[tileID] = {};
+	    }
 
-	        inflight[tileID] = true;
-	        d3_json(url)
-	            .then(function(result) {
-	                delete inflight[tileID];
-	                if (!result) {
-	                    throw new Error('Unknown Error');
-	                }
-	                var vintage = {
-	                    start: localeDateString(result.resourceSets[0].resources[0].vintageStart),
-	                    end: localeDateString(result.resourceSets[0].resources[0].vintageEnd)
-	                };
-	                vintage.range = vintageRange(vintage);
-
-	                var metadata = { vintage: vintage };
-	                cache[tileID].metadata = metadata;
-	                if (callback) { callback(null, metadata); }
-	            })
-	            .catch(function(err) {
-	                delete inflight[tileID];
-	                if (callback) { callback(err.message); }
-	            });
-	    };
+	    if (cache[tileID] && cache[tileID].metadata) {
+	      return callback(null, cache[tileID].metadata);
+	    }
 
+	    inflight[tileID] = true;
+	    d3_json(url).then(function (result) {
+	      delete inflight[tileID];
 
-	    bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
+	      if (!result) {
+	        throw new Error('Unknown Error');
+	      }
 
+	      var vintage = {
+	        start: localeDateString(result.resourceSets[0].resources[0].vintageStart),
+	        end: localeDateString(result.resourceSets[0].resources[0].vintageEnd)
+	      };
+	      vintage.range = vintageRange(vintage);
+	      var metadata = {
+	        vintage: vintage
+	      };
+	      cache[tileID].metadata = metadata;
+	      if (callback) callback(null, metadata);
+	    })["catch"](function (err) {
+	      delete inflight[tileID];
+	      if (callback) callback(err.message);
+	    });
+	  };
 
-	    return bing;
+	  bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
+	  return bing;
 	};
 
+	rendererBackgroundSource.Esri = function (data) {
+	  // in addition to using the tilemap at zoom level 20, overzoom real tiles - #4327 (deprecated technique, but it works)
+	  if (data.template.match(/blankTile/) === null) {
+	    data.template = data.template + '?blankTile=false';
+	  }
 
+	  var esri = rendererBackgroundSource(data);
+	  var cache = {};
+	  var inflight = {};
 
-	rendererBackgroundSource.Esri = function(data) {
-	    // in addition to using the tilemap at zoom level 20, overzoom real tiles - #4327 (deprecated technique, but it works)
-	    if (data.template.match(/blankTile/) === null) {
-	        data.template = data.template + '?blankTile=false';
-	    }
-
-	    var esri = rendererBackgroundSource(data);
-	    var cache = {};
-	    var inflight = {};
-	    var _prevCenter;
-
-	    // use a tilemap service to set maximum zoom for esri tiles dynamically
-	    // https://developers.arcgis.com/documentation/tiled-elevation-service/
-	    esri.fetchTilemap = function(center) {
-	        // skip if we have already fetched a tilemap within 5km
-	        if (_prevCenter && geoSphericalDistance(center, _prevCenter) < 5000) { return; }
-	        _prevCenter = center;
-
-	        // tiles are available globally to zoom level 19, afterward they may or may not be present
-	        var z = 20;
-
-	        // first generate a random url using the template
-	        var dummyUrl = esri.url([1,2,3]);
+	  var _prevCenter; // use a tilemap service to set maximum zoom for esri tiles dynamically
+	  // https://developers.arcgis.com/documentation/tiled-elevation-service/
 
-	        // calculate url z/y/x from the lat/long of the center of the map
-	        var x = (Math.floor((center[0] + 180) / 360 * Math.pow(2, z)));
-	        var y = (Math.floor((1 - Math.log(Math.tan(center[1] * Math.PI / 180) + 1 / Math.cos(center[1] * Math.PI / 180)) / Math.PI) / 2 * Math.pow(2, z)));
 
-	        // fetch an 8x8 grid to leverage cache
-	        var tilemapUrl = dummyUrl.replace(/tile\/[0-9]+\/[0-9]+\/[0-9]+\?blankTile=false/, 'tilemap') + '/' + z + '/' + y + '/' + x + '/8/8';
+	  esri.fetchTilemap = function (center) {
+	    // skip if we have already fetched a tilemap within 5km
+	    if (_prevCenter && geoSphericalDistance(center, _prevCenter) < 5000) return;
+	    _prevCenter = center; // tiles are available globally to zoom level 19, afterward they may or may not be present
 
-	        // make the request and introspect the response from the tilemap server
-	        d3_json(tilemapUrl)
-	            .then(function(tilemap) {
-	                if (!tilemap) {
-	                    throw new Error('Unknown Error');
-	                }
-	                var hasTiles = true;
-	                for (var i = 0; i < tilemap.data.length; i++) {
-	                    // 0 means an individual tile in the grid doesn't exist
-	                    if (!tilemap.data[i]) {
-	                        hasTiles = false;
-	                        break;
-	                    }
-	                }
+	    var z = 20; // first generate a random url using the template
 
-	                // if any tiles are missing at level 20 we restrict maxZoom to 19
-	                esri.zoomExtent[1] = (hasTiles ? 22 : 19);
-	            })
-	            .catch(function() {
-	                /* ignore */
-	            });
-	    };
+	    var dummyUrl = esri.url([1, 2, 3]); // calculate url z/y/x from the lat/long of the center of the map
 
+	    var x = Math.floor((center[0] + 180) / 360 * Math.pow(2, z));
+	    var y = Math.floor((1 - Math.log(Math.tan(center[1] * Math.PI / 180) + 1 / Math.cos(center[1] * Math.PI / 180)) / Math.PI) / 2 * Math.pow(2, z)); // fetch an 8x8 grid to leverage cache
 
-	    esri.getMetadata = function(center, tileCoord, callback) {
-	        var tileID = tileCoord.slice(0, 3).join('/');
-	        var zoom = Math.min(tileCoord[2], esri.zoomExtent[1]);
-	        var centerPoint = center[0] + ',' + center[1];  // long, lat (as it should be)
-	        var unknown = _t('info_panels.background.unknown');
-	        var metadataLayer;
-	        var vintage = {};
-	        var metadata = {};
+	    var tilemapUrl = dummyUrl.replace(/tile\/[0-9]+\/[0-9]+\/[0-9]+\?blankTile=false/, 'tilemap') + '/' + z + '/' + y + '/' + x + '/8/8'; // make the request and introspect the response from the tilemap server
 
-	        if (inflight[tileID]) { return; }
+	    d3_json(tilemapUrl).then(function (tilemap) {
+	      if (!tilemap) {
+	        throw new Error('Unknown Error');
+	      }
 
-	        switch (true) {
-	            case (zoom >= 20 && esri.id === 'EsriWorldImageryClarity'):
-	                metadataLayer = 4;
-	                break;
-	            case zoom >= 19:
-	                metadataLayer = 3;
-	                break;
-	            case zoom >= 17:
-	                metadataLayer = 2;
-	                break;
-	            case zoom >= 13:
-	                metadataLayer = 0;
-	                break;
-	            default:
-	                metadataLayer = 99;
-	        }
+	      var hasTiles = true;
 
-	        var url;
-	        // build up query using the layer appropriate to the current zoom
-	        if (esri.id === 'EsriWorldImagery') {
-	            url = 'https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/';
-	        } else if (esri.id === 'EsriWorldImageryClarity') {
-	            url = 'https://serviceslab.arcgisonline.com/arcgis/rest/services/Clarity_World_Imagery/MapServer/';
+	      for (var i = 0; i < tilemap.data.length; i++) {
+	        // 0 means an individual tile in the grid doesn't exist
+	        if (!tilemap.data[i]) {
+	          hasTiles = false;
+	          break;
 	        }
+	      } // if any tiles are missing at level 20 we restrict maxZoom to 19
 
-	        url += metadataLayer + '/query?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
-
-	        if (!cache[tileID]) {
-	            cache[tileID] = {};
-	        }
-	        if (cache[tileID] && cache[tileID].metadata) {
-	            return callback(null, cache[tileID].metadata);
-	        }
 
-	        // accurate metadata is only available >= 13
-	        if (metadataLayer === 99) {
-	            vintage = {
-	                start: null,
-	                end: null,
-	                range: null
-	            };
-	            metadata = {
-	                vintage: null,
-	                source: unknown,
-	                description: unknown,
-	                resolution: unknown,
-	                accuracy: unknown
-	            };
+	      esri.zoomExtent[1] = hasTiles ? 22 : 19;
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  };
 
-	            callback(null, metadata);
+	  esri.getMetadata = function (center, tileCoord, callback) {
+	    if (esri.id !== 'EsriWorldImagery') {
+	      // rest endpoint is not available for ESRI's "clarity" imagery
+	      return callback(null, {});
+	    }
 
-	        } else {
-	            inflight[tileID] = true;
-	            d3_json(url)
-	                .then(function(result) {
-	                    delete inflight[tileID];
-	                    if (!result) {
-	                        throw new Error('Unknown Error');
-	                    } else if (result.features && result.features.length < 1) {
-	                        throw new Error('No Results');
-	                    } else if (result.error && result.error.message) {
-	                        throw new Error(result.error.message);
-	                    }
+	    var tileID = tileCoord.slice(0, 3).join('/');
+	    var zoom = Math.min(tileCoord[2], esri.zoomExtent[1]);
+	    var centerPoint = center[0] + ',' + center[1]; // long, lat (as it should be)
 
-	                    // pass through the discrete capture date from metadata
-	                    var captureDate = localeDateString(result.features[0].attributes.SRC_DATE2);
-	                    vintage = {
-	                        start: captureDate,
-	                        end: captureDate,
-	                        range: captureDate
-	                    };
-	                    metadata = {
-	                        vintage: vintage,
-	                        source: clean(result.features[0].attributes.NICE_NAME),
-	                        description: clean(result.features[0].attributes.NICE_DESC),
-	                        resolution: clean(+parseFloat(result.features[0].attributes.SRC_RES).toFixed(4)),
-	                        accuracy: clean(+parseFloat(result.features[0].attributes.SRC_ACC).toFixed(4))
-	                    };
-
-	                    // append units - meters
-	                    if (isFinite(metadata.resolution)) {
-	                        metadata.resolution += ' m';
-	                    }
-	                    if (isFinite(metadata.accuracy)) {
-	                        metadata.accuracy += ' m';
-	                    }
+	    var unknown = _t('info_panels.background.unknown');
+	    var vintage = {};
+	    var metadata = {};
+	    if (inflight[tileID]) return; // build up query using the layer appropriate to the current zoom
 
-	                    cache[tileID].metadata = metadata;
-	                    if (callback) { callback(null, metadata); }
-	                })
-	                .catch(function(err) {
-	                    delete inflight[tileID];
-	                    if (callback) { callback(err.message); }
-	                });
-	        }
+	    var url = 'https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/4/query';
+	    url += '?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
 
+	    if (!cache[tileID]) {
+	      cache[tileID] = {};
+	    }
 
-	        function clean(val) {
-	            return String(val).trim() || unknown;
-	        }
-	    };
+	    if (cache[tileID] && cache[tileID].metadata) {
+	      return callback(null, cache[tileID].metadata);
+	    }
 
-	    return esri;
-	};
+	    inflight[tileID] = true;
+	    d3_json(url).then(function (result) {
+	      delete inflight[tileID];
+	      result = result.features.map(function (f) {
+	        return f.attributes;
+	      }).filter(function (a) {
+	        return a.MinMapLevel <= zoom && a.MaxMapLevel >= zoom;
+	      })[0];
 
+	      if (!result) {
+	        throw new Error('Unknown Error');
+	      } else if (result.features && result.features.length < 1) {
+	        throw new Error('No Results');
+	      } else if (result.error && result.error.message) {
+	        throw new Error(result.error.message);
+	      } // pass through the discrete capture date from metadata
 
-	rendererBackgroundSource.None = function() {
-	    var source = rendererBackgroundSource({ id: 'none', template: '' });
 
+	      var captureDate = localeDateString(result.SRC_DATE2);
+	      vintage = {
+	        start: captureDate,
+	        end: captureDate,
+	        range: captureDate
+	      };
+	      metadata = {
+	        vintage: vintage,
+	        source: clean(result.NICE_NAME),
+	        description: clean(result.NICE_DESC),
+	        resolution: clean(+parseFloat(result.SRC_RES).toFixed(4)),
+	        accuracy: clean(+parseFloat(result.SRC_ACC).toFixed(4))
+	      }; // append units - meters
+
+	      if (isFinite(metadata.resolution)) {
+	        metadata.resolution += ' m';
+	      }
 
-	    source.name = function() {
-	        return _t('background.none');
-	    };
+	      if (isFinite(metadata.accuracy)) {
+	        metadata.accuracy += ' m';
+	      }
 
+	      cache[tileID].metadata = metadata;
+	      if (callback) callback(null, metadata);
+	    })["catch"](function (err) {
+	      delete inflight[tileID];
+	      if (callback) callback(err.message);
+	    });
 
-	    source.imageryUsed = function() {
-	        return null;
-	    };
+	    function clean(val) {
+	      return String(val).trim() || unknown;
+	    }
+	  };
 
+	  return esri;
+	};
 
-	    source.area = function() {
-	        return -1;  // sources in background pane are sorted by area
-	    };
+	rendererBackgroundSource.None = function () {
+	  var source = rendererBackgroundSource({
+	    id: 'none',
+	    template: ''
+	  });
 
+	  source.name = function () {
+	    return _t('background.none');
+	  };
 
-	    return source;
-	};
+	  source.label = function () {
+	    return _t.html('background.none');
+	  };
 
+	  source.imageryUsed = function () {
+	    return null;
+	  };
 
-	rendererBackgroundSource.Custom = function(template) {
-	    var source = rendererBackgroundSource({ id: 'custom', template: template });
+	  source.area = function () {
+	    return -1; // sources in background pane are sorted by area
+	  };
 
+	  return source;
+	};
 
-	    source.name = function() {
-	        return _t('background.custom');
-	    };
+	rendererBackgroundSource.Custom = function (template) {
+	  var source = rendererBackgroundSource({
+	    id: 'custom',
+	    template: template
+	  });
 
+	  source.name = function () {
+	    return _t('background.custom');
+	  };
 
-	    source.imageryUsed = function() {
-	        // sanitize personal connection tokens - #6801
-	        var cleaned = source.template();
+	  source.label = function () {
+	    return _t.html('background.custom');
+	  };
 
-	        // from query string parameters
-	        if (cleaned.indexOf('?') !== -1) {
-	            var parts = cleaned.split('?', 2);
-	            var qs = utilStringQs(parts[1]);
+	  source.imageryUsed = function () {
+	    // sanitize personal connection tokens - #6801
+	    var cleaned = source.template(); // from query string parameters
 
-	            ['access_token', 'connectId', 'token'].forEach(function(param) {
-	                if (qs[param]) {
-	                    qs[param] = '{apikey}';
-	                }
-	            });
-	            cleaned = parts[0] + '?' + utilQsString(qs, true);  // true = soft encode
+	    if (cleaned.indexOf('?') !== -1) {
+	      var parts = cleaned.split('?', 2);
+	      var qs = utilStringQs(parts[1]);
+	      ['access_token', 'connectId', 'token'].forEach(function (param) {
+	        if (qs[param]) {
+	          qs[param] = '{apikey}';
 	        }
-
-	        // from wms/wmts api path parameters
-	        cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
-
-	        return 'Custom (' + cleaned + ' )';
-	    };
+	      });
+	      cleaned = parts[0] + '?' + utilQsString(qs, true); // true = soft encode
+	    } // from wms/wmts api path parameters
 
 
-	    source.area = function() {
-	        return -2;  // sources in background pane are sorted by area
-	    };
+	    cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
+	    return 'Custom (' + cleaned + ' )';
+	  };
 
+	  source.area = function () {
+	    return -2; // sources in background pane are sorted by area
+	  };
 
-	    return source;
+	  return source;
 	};
 
 	function rendererTileLayer(context) {
-	    var transformProp = utilPrefixCSSProperty('Transform');
-	    var tiler = utilTiler();
+	  var transformProp = utilPrefixCSSProperty('Transform');
+	  var tiler = utilTiler();
+	  var _tileSize = 256;
 
-	    var _tileSize = 256;
-	    var _projection;
-	    var _cache = {};
-	    var _tileOrigin;
-	    var _zoom;
-	    var _source;
+	  var _projection;
 
+	  var _cache = {};
 
-	    function tileSizeAtZoom(d, z) {
-	        var EPSILON = 0.002;    // close seams
-	        return ((_tileSize * Math.pow(2, z - d[2])) / _tileSize) + EPSILON;
-	    }
-
+	  var _tileOrigin;
 
-	    function atZoom(t, distance) {
-	        var power = Math.pow(2, distance);
-	        return [
-	            Math.floor(t[0] * power),
-	            Math.floor(t[1] * power),
-	            t[2] + distance
-	        ];
-	    }
+	  var _zoom;
 
+	  var _source;
 
-	    function lookUp(d) {
-	        for (var up = -1; up > -d[2]; up--) {
-	            var tile = atZoom(d, up);
-	            if (_cache[_source.url(tile)] !== false) {
-	                return tile;
-	            }
-	        }
-	    }
+	  function tileSizeAtZoom(d, z) {
+	    var EPSILON = 0.002; // close seams
 
+	    return _tileSize * Math.pow(2, z - d[2]) / _tileSize + EPSILON;
+	  }
 
-	    function uniqueBy(a, n) {
-	        var o = [];
-	        var seen = {};
-	        for (var i = 0; i < a.length; i++) {
-	            if (seen[a[i][n]] === undefined) {
-	                o.push(a[i]);
-	                seen[a[i][n]] = true;
-	            }
-	        }
-	        return o;
-	    }
+	  function atZoom(t, distance) {
+	    var power = Math.pow(2, distance);
+	    return [Math.floor(t[0] * power), Math.floor(t[1] * power), t[2] + distance];
+	  }
 
+	  function lookUp(d) {
+	    for (var up = -1; up > -d[2]; up--) {
+	      var tile = atZoom(d, up);
 
-	    function addSource(d) {
-	        d.push(_source.url(d));
-	        return d;
+	      if (_cache[_source.url(tile)] !== false) {
+	        return tile;
+	      }
 	    }
+	  }
 
+	  function uniqueBy(a, n) {
+	    var o = [];
+	    var seen = {};
 
-	    // Update tiles based on current state of `projection`.
-	    function background(selection) {
-	        _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
+	    for (var i = 0; i < a.length; i++) {
+	      if (seen[a[i][n]] === undefined) {
+	        o.push(a[i]);
+	        seen[a[i][n]] = true;
+	      }
+	    }
 
-	        var pixelOffset;
-	        if (_source) {
-	            pixelOffset = [
-	                _source.offset()[0] * Math.pow(2, _zoom),
-	                _source.offset()[1] * Math.pow(2, _zoom)
-	            ];
-	        } else {
-	            pixelOffset = [0, 0];
-	        }
+	    return o;
+	  }
 
-	        var translate = [
-	            _projection.translate()[0] + pixelOffset[0],
-	            _projection.translate()[1] + pixelOffset[1]
-	        ];
+	  function addSource(d) {
+	    d.push(_source.url(d));
+	    return d;
+	  } // Update tiles based on current state of `projection`.
 
-	        tiler
-	            .scale(_projection.scale() * 2 * Math.PI)
-	            .translate(translate);
 
-	        _tileOrigin = [
-	            _projection.scale() * Math.PI - translate[0],
-	            _projection.scale() * Math.PI - translate[1]
-	        ];
+	  function background(selection) {
+	    _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
+	    var pixelOffset;
 
-	        render(selection);
+	    if (_source) {
+	      pixelOffset = [_source.offset()[0] * Math.pow(2, _zoom), _source.offset()[1] * Math.pow(2, _zoom)];
+	    } else {
+	      pixelOffset = [0, 0];
 	    }
 
+	    var translate = [_projection.translate()[0] + pixelOffset[0], _projection.translate()[1] + pixelOffset[1]];
+	    tiler.scale(_projection.scale() * 2 * Math.PI).translate(translate);
+	    _tileOrigin = [_projection.scale() * Math.PI - translate[0], _projection.scale() * Math.PI - translate[1]];
+	    render(selection);
+	  } // Derive the tiles onscreen, remove those offscreen and position them.
+	  // Important that this part not depend on `_projection` because it's
+	  // rentered when tiles load/error (see #644).
 
-	    // Derive the tiles onscreen, remove those offscreen and position them.
-	    // Important that this part not depend on `_projection` because it's
-	    // rentered when tiles load/error (see #644).
-	    function render(selection) {
-	        if (!_source) { return; }
-	        var requests = [];
-	        var showDebug = context.getDebug('tile') && !_source.overlay;
-
-	        if (_source.validZoom(_zoom)) {
-	            tiler.skipNullIsland(!!_source.overlay);
 
-	            tiler().forEach(function(d) {
-	                addSource(d);
-	                if (d[3] === '') { return; }
-	                if (typeof d[3] !== 'string') { return; } // Workaround for #2295
-	                requests.push(d);
-	                if (_cache[d[3]] === false && lookUp(d)) {
-	                    requests.push(addSource(lookUp(d)));
-	                }
-	            });
+	  function render(selection) {
+	    if (!_source) return;
+	    var requests = [];
+	    var showDebug = context.getDebug('tile') && !_source.overlay;
 
-	            requests = uniqueBy(requests, 3).filter(function(r) {
-	                // don't re-request tiles which have failed in the past
-	                return _cache[r[3]] !== false;
-	            });
-	        }
+	    if (_source.validZoom(_zoom)) {
+	      tiler.skipNullIsland(!!_source.overlay);
+	      tiler().forEach(function (d) {
+	        addSource(d);
+	        if (d[3] === '') return;
+	        if (typeof d[3] !== 'string') return; // Workaround for #2295
 
-	        function load(d) {
-	            _cache[d[3]] = true;
-	            select(this)
-	                .on('error', null)
-	                .on('load', null)
-	                .classed('tile-loaded', true);
-	            render(selection);
-	        }
+	        requests.push(d);
 
-	        function error(d) {
-	            _cache[d[3]] = false;
-	            select(this)
-	                .on('error', null)
-	                .on('load', null)
-	                .remove();
-	            render(selection);
+	        if (_cache[d[3]] === false && lookUp(d)) {
+	          requests.push(addSource(lookUp(d)));
 	        }
+	      });
+	      requests = uniqueBy(requests, 3).filter(function (r) {
+	        // don't re-request tiles which have failed in the past
+	        return _cache[r[3]] !== false;
+	      });
+	    }
 
-	        function imageTransform(d) {
-	            var ts = _tileSize * Math.pow(2, _zoom - d[2]);
-	            var scale = tileSizeAtZoom(d, _zoom);
-	            return 'translate(' +
-	                ((d[0] * ts) - _tileOrigin[0]) + 'px,' +
-	                ((d[1] * ts) - _tileOrigin[1]) + 'px) ' +
-	                'scale(' + scale + ',' + scale + ')';
-	        }
+	    function load(d3_event, d) {
+	      _cache[d[3]] = true;
+	      select(this).on('error', null).on('load', null).classed('tile-loaded', true);
+	      render(selection);
+	    }
 
-	        function tileCenter(d) {
-	            var ts = _tileSize * Math.pow(2, _zoom - d[2]);
-	            return [
-	                ((d[0] * ts) - _tileOrigin[0] + (ts / 2)),
-	                ((d[1] * ts) - _tileOrigin[1] + (ts / 2))
-	            ];
-	        }
+	    function error(d3_event, d) {
+	      _cache[d[3]] = false;
+	      select(this).on('error', null).on('load', null).remove();
+	      render(selection);
+	    }
 
-	        function debugTransform(d) {
-	            var coord = tileCenter(d);
-	            return 'translate(' + coord[0] + 'px,' + coord[1] + 'px)';
-	        }
+	    function imageTransform(d) {
+	      var ts = _tileSize * Math.pow(2, _zoom - d[2]);
 
+	      var scale = tileSizeAtZoom(d, _zoom);
+	      return 'translate(' + (d[0] * ts - _tileOrigin[0]) + 'px,' + (d[1] * ts - _tileOrigin[1]) + 'px) ' + 'scale(' + scale + ',' + scale + ')';
+	    }
 
-	        // Pick a representative tile near the center of the viewport
-	        // (This is useful for sampling the imagery vintage)
-	        var dims = tiler.size();
-	        var mapCenter = [dims[0] / 2, dims[1] / 2];
-	        var minDist = Math.max(dims[0], dims[1]);
-	        var nearCenter;
+	    function tileCenter(d) {
+	      var ts = _tileSize * Math.pow(2, _zoom - d[2]);
 
-	        requests.forEach(function(d) {
-	            var c = tileCenter(d);
-	            var dist = geoVecLength(c, mapCenter);
-	            if (dist < minDist) {
-	                minDist = dist;
-	                nearCenter = d;
-	            }
-	        });
+	      return [d[0] * ts - _tileOrigin[0] + ts / 2, d[1] * ts - _tileOrigin[1] + ts / 2];
+	    }
 
+	    function debugTransform(d) {
+	      var coord = tileCenter(d);
+	      return 'translate(' + coord[0] + 'px,' + coord[1] + 'px)';
+	    } // Pick a representative tile near the center of the viewport
+	    // (This is useful for sampling the imagery vintage)
 
-	        var image = selection.selectAll('img')
-	            .data(requests, function(d) { return d[3]; });
 
-	        image.exit()
-	            .style(transformProp, imageTransform)
-	            .classed('tile-removing', true)
-	            .classed('tile-center', false)
-	            .each(function() {
-	                var tile = select(this);
-	                window.setTimeout(function() {
-	                    if (tile.classed('tile-removing')) {
-	                        tile.remove();
-	                    }
-	                }, 300);
-	            });
+	    var dims = tiler.size();
+	    var mapCenter = [dims[0] / 2, dims[1] / 2];
+	    var minDist = Math.max(dims[0], dims[1]);
+	    var nearCenter;
+	    requests.forEach(function (d) {
+	      var c = tileCenter(d);
+	      var dist = geoVecLength(c, mapCenter);
 
-	        image.enter()
-	          .append('img')
-	            .attr('class', 'tile')
-	            .attr('draggable', 'false')
-	            .style('width', _tileSize + 'px')
-	            .style('height', _tileSize + 'px')
-	            .attr('src', function(d) { return d[3]; })
-	            .on('error', error)
-	            .on('load', load)
-	          .merge(image)
-	            .style(transformProp, imageTransform)
-	            .classed('tile-debug', showDebug)
-	            .classed('tile-removing', false)
-	            .classed('tile-center', function(d) { return d === nearCenter; });
-
-
-
-	        var debug = selection.selectAll('.tile-label-debug')
-	            .data(showDebug ? requests : [], function(d) { return d[3]; });
-
-	        debug.exit()
-	            .remove();
-
-	        if (showDebug) {
-	            var debugEnter = debug.enter()
-	                .append('div')
-	                .attr('class', 'tile-label-debug');
-
-	            debugEnter
-	                .append('div')
-	                .attr('class', 'tile-label-debug-coord');
-
-	            debugEnter
-	                .append('div')
-	                .attr('class', 'tile-label-debug-vintage');
-
-	            debug = debug.merge(debugEnter);
-
-	            debug
-	                .style(transformProp, debugTransform);
-
-	            debug
-	                .selectAll('.tile-label-debug-coord')
-	                .text(function(d) { return d[2] + ' / ' + d[0] + ' / ' + d[1]; });
-
-	            debug
-	                .selectAll('.tile-label-debug-vintage')
-	                .each(function(d) {
-	                    var span = select(this);
-	                    var center = context.projection.invert(tileCenter(d));
-	                    _source.getMetadata(center, d, function(err, result) {
-	                        span.text((result && result.vintage && result.vintage.range) ||
-	                            _t('info_panels.background.vintage') + ': ' + _t('info_panels.background.unknown')
-	                        );
-	                    });
-	                });
+	      if (dist < minDist) {
+	        minDist = dist;
+	        nearCenter = d;
+	      }
+	    });
+	    var image = selection.selectAll('img').data(requests, function (d) {
+	      return d[3];
+	    });
+	    image.exit().style(transformProp, imageTransform).classed('tile-removing', true).classed('tile-center', false).each(function () {
+	      var tile = select(this);
+	      window.setTimeout(function () {
+	        if (tile.classed('tile-removing')) {
+	          tile.remove();
 	        }
+	      }, 300);
+	    });
+	    image.enter().append('img').attr('class', 'tile').attr('alt', '').attr('draggable', 'false').style('width', _tileSize + 'px').style('height', _tileSize + 'px').attr('src', function (d) {
+	      return d[3];
+	    }).on('error', error).on('load', load).merge(image).style(transformProp, imageTransform).classed('tile-debug', showDebug).classed('tile-removing', false).classed('tile-center', function (d) {
+	      return d === nearCenter;
+	    });
+	    var debug = selection.selectAll('.tile-label-debug').data(showDebug ? requests : [], function (d) {
+	      return d[3];
+	    });
+	    debug.exit().remove();
+
+	    if (showDebug) {
+	      var debugEnter = debug.enter().append('div').attr('class', 'tile-label-debug');
+	      debugEnter.append('div').attr('class', 'tile-label-debug-coord');
+	      debugEnter.append('div').attr('class', 'tile-label-debug-vintage');
+	      debug = debug.merge(debugEnter);
+	      debug.style(transformProp, debugTransform);
+	      debug.selectAll('.tile-label-debug-coord').text(function (d) {
+	        return d[2] + ' / ' + d[0] + ' / ' + d[1];
+	      });
+	      debug.selectAll('.tile-label-debug-vintage').each(function (d) {
+	        var span = select(this);
+	        var center = context.projection.invert(tileCenter(d));
 
+	        _source.getMetadata(center, d, function (err, result) {
+	          if (result && result.vintage && result.vintage.range) {
+	            span.text(result.vintage.range);
+	          } else {
+	            span.html(_t.html('info_panels.background.vintage') + ': ' + _t.html('info_panels.background.unknown'));
+	          }
+	        });
+	      });
 	    }
+	  }
 
+	  background.projection = function (val) {
+	    if (!arguments.length) return _projection;
+	    _projection = val;
+	    return background;
+	  };
 
-	    background.projection = function(val) {
-	        if (!arguments.length) { return _projection; }
-	        _projection = val;
-	        return background;
-	    };
-
-
-	    background.dimensions = function(val) {
-	        if (!arguments.length) { return tiler.size(); }
-	        tiler.size(val);
-	        return background;
-	    };
-
-
-	    background.source = function(val) {
-	        if (!arguments.length) { return _source; }
-	        _source = val;
-	        _tileSize = _source.tileSize;
-	        _cache = {};
-	        tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
-	        return background;
-	    };
-
+	  background.dimensions = function (val) {
+	    if (!arguments.length) return tiler.size();
+	    tiler.size(val);
+	    return background;
+	  };
 
+	  background.source = function (val) {
+	    if (!arguments.length) return _source;
+	    _source = val;
+	    _tileSize = _source.tileSize;
+	    _cache = {};
+	    tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
 	    return background;
+	  };
+
+	  return background;
 	}
 
 	var _imageryIndex = null;
-
 	function rendererBackground(context) {
-	  var dispatch$1 = dispatch('change');
+	  var dispatch = dispatch$8('change');
 	  var detected = utilDetect();
 	  var baseLayer = rendererTileLayer(context).projection(context.projection);
+	  var _checkedBlocklists = [];
 	  var _isValid = true;
 	  var _overlayLayers = [];
 	  var _brightness = 1;
@@ -63202,111 +79845,111 @@
 	  var _saturation = 1;
 	  var _sharpness = 1;
 
-
 	  function ensureImageryIndex() {
-	    return _mainFileFetcher.get('imagery')
-	      .then(function (sources) {
-	        if (_imageryIndex) { return _imageryIndex; }
-
-	        _imageryIndex = {
-	          imagery: sources,
-	          features: {}
+	    return _mainFileFetcher.get('imagery').then(function (sources) {
+	      if (_imageryIndex) return _imageryIndex;
+	      _imageryIndex = {
+	        imagery: sources,
+	        features: {}
+	      }; // use which-polygon to support efficient index and querying for imagery
+
+	      var features = sources.map(function (source) {
+	        if (!source.polygon) return null; // workaround for editor-layer-index weirdness..
+	        // Add an extra array nest to each element in `source.polygon`
+	        // so the rings are not treated as a bunch of holes:
+	        // what we have: [ [[outer],[hole],[hole]] ]
+	        // what we want: [ [[outer]],[[outer]],[[outer]] ]
+
+	        var rings = source.polygon.map(function (ring) {
+	          return [ring];
+	        });
+	        var feature = {
+	          type: 'Feature',
+	          properties: {
+	            id: source.id
+	          },
+	          geometry: {
+	            type: 'MultiPolygon',
+	            coordinates: rings
+	          }
 	        };
+	        _imageryIndex.features[source.id] = feature;
+	        return feature;
+	      }).filter(Boolean);
+	      _imageryIndex.query = whichPolygon_1({
+	        type: 'FeatureCollection',
+	        features: features
+	      }); // Instantiate `rendererBackgroundSource` objects for each source
+
+	      _imageryIndex.backgrounds = sources.map(function (source) {
+	        if (source.type === 'bing') {
+	          return rendererBackgroundSource.Bing(source, dispatch);
+	        } else if (/^EsriWorldImagery/.test(source.id)) {
+	          return rendererBackgroundSource.Esri(source);
+	        } else {
+	          return rendererBackgroundSource(source);
+	        }
+	      }); // Add 'None'
 
-	        // use which-polygon to support efficient index and querying for imagery
-	        var features = sources.map(function (source) {
-	          if (!source.polygon) { return null; }
-	          // workaround for editor-layer-index weirdness..
-	          // Add an extra array nest to each element in `source.polygon`
-	          // so the rings are not treated as a bunch of holes:
-	          // what we have: [ [[outer],[hole],[hole]] ]
-	          // what we want: [ [[outer]],[[outer]],[[outer]] ]
-	          var rings = source.polygon.map(function (ring) { return [ring]; });
-
-	          var feature = {
-	            type: 'Feature',
-	            properties: { id: source.id },
-	            geometry: { type: 'MultiPolygon', coordinates: rings }
-	          };
-
-	          _imageryIndex.features[source.id] = feature;
-	          return feature;
-
-	        }).filter(Boolean);
-
-	        _imageryIndex.query = whichPolygon_1({ type: 'FeatureCollection', features: features });
-
+	      _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None()); // Add 'Custom'
 
-	        // Instantiate `rendererBackgroundSource` objects for each source
-	        _imageryIndex.backgrounds = sources.map(function (source) {
-	          if (source.type === 'bing') {
-	            return rendererBackgroundSource.Bing(source, dispatch$1);
-	          } else if (/^EsriWorldImagery/.test(source.id)) {
-	            return rendererBackgroundSource.Esri(source);
-	          } else {
-	            return rendererBackgroundSource(source);
-	          }
-	        });
 
-	        // Add 'None'
-	        _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None());
+	      var template = corePreferences('background-custom-template') || '';
+	      var custom = rendererBackgroundSource.Custom(template);
 
-	        // Add 'Custom'
-	        var template = corePreferences('background-custom-template') || '';
-	        var custom = rendererBackgroundSource.Custom(template);
-	        _imageryIndex.backgrounds.unshift(custom);
+	      _imageryIndex.backgrounds.unshift(custom);
 
-	        return _imageryIndex;
-	      });
+	      return _imageryIndex;
+	    });
 	  }
 
-
 	  function background(selection) {
-	    var currSource = baseLayer.source();
-
-	    // If we are displaying an Esri basemap at high zoom,
+	    var currSource = baseLayer.source(); // If we are displaying an Esri basemap at high zoom,
 	    // check its tilemap to see how high the zoom can go
+
 	    if (context.map().zoom() > 18) {
 	      if (currSource && /^EsriWorldImagery/.test(currSource.id)) {
 	        var center = context.map().center();
 	        currSource.fetchTilemap(center);
 	      }
-	    }
+	    } // Is the imagery valid here? - #4827
+
 
-	    // Is the imagery valid here? - #4827
 	    var sources = background.sources(context.map().extent());
 	    var wasValid = _isValid;
-	    _isValid = !!sources.filter(function (d) { return d === currSource; }).length;
+	    _isValid = !!sources.filter(function (d) {
+	      return d === currSource;
+	    }).length;
 
-	    if (wasValid !== _isValid) {      // change in valid status
+	    if (wasValid !== _isValid) {
+	      // change in valid status
 	      background.updateImagery();
 	    }
 
-
 	    var baseFilter = '';
+
 	    if (detected.cssfilters) {
 	      if (_brightness !== 1) {
-	        baseFilter += " brightness(" + _brightness + ")";
+	        baseFilter += " brightness(".concat(_brightness, ")");
 	      }
+
 	      if (_contrast !== 1) {
-	        baseFilter += " contrast(" + _contrast + ")";
+	        baseFilter += " contrast(".concat(_contrast, ")");
 	      }
+
 	      if (_saturation !== 1) {
-	        baseFilter += " saturate(" + _saturation + ")";
+	        baseFilter += " saturate(".concat(_saturation, ")");
 	      }
-	      if (_sharpness < 1) {  // gaussian blur
+
+	      if (_sharpness < 1) {
+	        // gaussian blur
 	        var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
-	        baseFilter += " blur(" + blur + "px)";
+	        baseFilter += " blur(".concat(blur, "px)");
 	      }
 	    }
 
-	    var base = selection.selectAll('.layer-background')
-	      .data([0]);
-
-	    base = base.enter()
-	      .insert('div', '.layer-data')
-	      .attr('class', 'layer layer-background')
-	      .merge(base);
+	    var base = selection.selectAll('.layer-background').data([0]);
+	    base = base.enter().insert('div', '.layer-data').attr('class', 'layer layer-background').merge(base);
 
 	    if (detected.cssfilters) {
 	      base.style('filter', baseFilter || null);
@@ -63314,77 +79957,52 @@
 	      base.style('opacity', _brightness);
 	    }
 
-
-	    var imagery = base.selectAll('.layer-imagery')
-	      .data([0]);
-
-	    imagery.enter()
-	      .append('div')
-	      .attr('class', 'layer layer-imagery')
-	      .merge(imagery)
-	      .call(baseLayer);
-
-
+	    var imagery = base.selectAll('.layer-imagery').data([0]);
+	    imagery.enter().append('div').attr('class', 'layer layer-imagery').merge(imagery).call(baseLayer);
 	    var maskFilter = '';
 	    var mixBlendMode = '';
-	    if (detected.cssfilters && _sharpness > 1) {  // apply unsharp mask
+
+	    if (detected.cssfilters && _sharpness > 1) {
+	      // apply unsharp mask
 	      mixBlendMode = 'overlay';
 	      maskFilter = 'saturate(0) blur(3px) invert(1)';
-
 	      var contrast = _sharpness - 1;
-	      maskFilter += " contrast(" + contrast + ")";
-
+	      maskFilter += " contrast(".concat(contrast, ")");
 	      var brightness = d3_interpolateNumber(1, 0.85)(_sharpness - 1);
-	      maskFilter += " brightness(" + brightness + ")";
+	      maskFilter += " brightness(".concat(brightness, ")");
 	    }
 
-	    var mask = base.selectAll('.layer-unsharp-mask')
-	      .data(detected.cssfilters && _sharpness > 1 ? [0] : []);
-
-	    mask.exit()
-	      .remove();
-
-	    mask.enter()
-	      .append('div')
-	      .attr('class', 'layer layer-mask layer-unsharp-mask')
-	      .merge(mask)
-	      .call(baseLayer)
-	      .style('filter', maskFilter || null)
-	      .style('mix-blend-mode', mixBlendMode || null);
-
-
-	    var overlays = selection.selectAll('.layer-overlay')
-	      .data(_overlayLayers, function (d) { return d.source().name(); });
-
-	    overlays.exit()
-	      .remove();
-
-	    overlays.enter()
-	      .insert('div', '.layer-data')
-	      .attr('class', 'layer layer-overlay')
-	      .merge(overlays)
-	      .each(function (layer, i, nodes) { return select(nodes[i]).call(layer); });
+	    var mask = base.selectAll('.layer-unsharp-mask').data(detected.cssfilters && _sharpness > 1 ? [0] : []);
+	    mask.exit().remove();
+	    mask.enter().append('div').attr('class', 'layer layer-mask layer-unsharp-mask').merge(mask).call(baseLayer).style('filter', maskFilter || null).style('mix-blend-mode', mixBlendMode || null);
+	    var overlays = selection.selectAll('.layer-overlay').data(_overlayLayers, function (d) {
+	      return d.source().name();
+	    });
+	    overlays.exit().remove();
+	    overlays.enter().insert('div', '.layer-data').attr('class', 'layer layer-overlay').merge(overlays).each(function (layer, i, nodes) {
+	      return select(nodes[i]).call(layer);
+	    });
 	  }
 
-
-	  background.updateImagery = function() {
+	  background.updateImagery = function () {
 	    var currSource = baseLayer.source();
-	    if (context.inIntro() || !currSource) { return; }
+	    if (context.inIntro() || !currSource) return;
 
-	    var o = _overlayLayers
-	      .filter(function (d) { return !d.source().isLocatorOverlay() && !d.source().isHidden(); })
-	      .map(function (d) { return d.source().id; })
-	      .join(',');
+	    var o = _overlayLayers.filter(function (d) {
+	      return !d.source().isLocatorOverlay() && !d.source().isHidden();
+	    }).map(function (d) {
+	      return d.source().id;
+	    }).join(',');
 
 	    var meters = geoOffsetToMeters(currSource.offset());
 	    var EPSILON = 0.01;
 	    var x = +meters[0].toFixed(2);
 	    var y = +meters[1].toFixed(2);
 	    var hash = utilStringQs(window.location.hash);
-
 	    var id = currSource.id;
+
 	    if (id === 'custom') {
-	      id = "custom:" + (currSource.template());
+	      id = "custom:".concat(currSource.template());
 	    }
 
 	    if (id) {
@@ -63400,7 +80018,7 @@
 	    }
 
 	    if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
-	      hash.offset = x + "," + y;
+	      hash.offset = "".concat(x, ",").concat(y);
 	    } else {
 	      delete hash.offset;
 	    }
@@ -63411,17 +80029,20 @@
 
 	    var imageryUsed = [];
 	    var photoOverlaysUsed = [];
-
 	    var currUsed = currSource.imageryUsed();
+
 	    if (currUsed && _isValid) {
 	      imageryUsed.push(currUsed);
 	    }
 
-	    _overlayLayers
-	      .filter(function (d) { return !d.source().isLocatorOverlay() && !d.source().isHidden(); })
-	      .forEach(function (d) { return imageryUsed.push(d.source().imageryUsed()); });
+	    _overlayLayers.filter(function (d) {
+	      return !d.source().isLocatorOverlay() && !d.source().isHidden();
+	    }).forEach(function (d) {
+	      return imageryUsed.push(d.source().imageryUsed());
+	    });
 
 	    var dataLayer = context.layers().layer('data');
+
 	    if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
 	      imageryUsed.push(dataLayer.getSrc());
 	    }
@@ -63431,11 +80052,12 @@
 	      mapillary: 'Mapillary Images',
 	      'mapillary-map-features': 'Mapillary Map Features',
 	      'mapillary-signs': 'Mapillary Signs',
-	      openstreetcam: 'OpenStreetCam Images'
+	      kartaview: 'KartaView Images'
 	    };
 
 	    for (var layerID in photoOverlayLayers) {
 	      var layer = context.layers().layer(layerID);
+
 	      if (layer && layer.enabled()) {
 	        photoOverlaysUsed.push(layerID);
 	        imageryUsed.push(photoOverlayLayers[layerID]);
@@ -63446,6162 +80068,3184 @@
 	    context.history().photoOverlaysUsed(photoOverlaysUsed);
 	  };
 
-
 	  background.sources = function (extent, zoom, includeCurrent) {
-	    if (!_imageryIndex) { return []; }   // called before init()?
+	    if (!_imageryIndex) return []; // called before init()?
 
 	    var visible = {};
-	    (_imageryIndex.query.bbox(extent.rectangle(), true) || [])
-	      .forEach(function (d) { return visible[d.id] = true; });
+	    (_imageryIndex.query.bbox(extent.rectangle(), true) || []).forEach(function (d) {
+	      return visible[d.id] = true;
+	    });
+	    var currSource = baseLayer.source(); // Recheck blocked sources only if we detect new blocklists pulled from the OSM API.
 
-	    var currSource = baseLayer.source();
+	    var osm = context.connection();
+	    var blocklists = osm && osm.imageryBlocklists() || [];
+	    var blocklistChanged = blocklists.length !== _checkedBlocklists.length || blocklists.some(function (regex, index) {
+	      return String(regex) !== _checkedBlocklists[index];
+	    });
+
+	    if (blocklistChanged) {
+	      _imageryIndex.backgrounds.forEach(function (source) {
+	        source.isBlocked = blocklists.some(function (regex) {
+	          return regex.test(source.template());
+	        });
+	      });
+
+	      _checkedBlocklists = blocklists.map(function (regex) {
+	        return String(regex);
+	      });
+	    }
 
 	    return _imageryIndex.backgrounds.filter(function (source) {
-	      if (!source.polygon) { return true; }                          // always include imagery with worldwide coverage
-	      if (includeCurrent && currSource === source) { return true; }  // optionally include the current imagery
-	      if (zoom && zoom < 6) { return false; }                        // optionally exclude local imagery at low zooms
-	      return visible[source.id];                                 // include imagery visible in given extent
+	      if (includeCurrent && currSource === source) return true; // optionally always include the current imagery
+
+	      if (source.isBlocked) return false; // even bundled sources may be blocked - #7905
+
+	      if (!source.polygon) return true; // always include imagery with worldwide coverage
+
+	      if (zoom && zoom < 6) return false; // optionally exclude local imagery at low zooms
+
+	      return visible[source.id]; // include imagery visible in given extent
 	    });
 	  };
 
-
 	  background.dimensions = function (val) {
-	    if (!val) { return; }
+	    if (!val) return;
 	    baseLayer.dimensions(val);
-	    _overlayLayers.forEach(function (layer) { return layer.dimensions(val); });
-	  };
 
+	    _overlayLayers.forEach(function (layer) {
+	      return layer.dimensions(val);
+	    });
+	  };
 
-	  background.baseLayerSource = function(d) {
-	    if (!arguments.length) { return baseLayer.source(); }
+	  background.baseLayerSource = function (d) {
+	    if (!arguments.length) return baseLayer.source(); // test source against OSM imagery blocklists..
 
-	    // test source against OSM imagery blacklists..
 	    var osm = context.connection();
-	    if (!osm) { return background; }
-
-	    var blacklists = osm.imageryBlacklists();
+	    if (!osm) return background;
+	    var blocklists = osm.imageryBlocklists();
 	    var template = d.template();
 	    var fail = false;
 	    var tested = 0;
 	    var regex;
 
-	    for (var i = 0; i < blacklists.length; i++) {
-	      try {
-	        regex = new RegExp(blacklists[i]);
-	        fail = regex.test(template);
-	        tested++;
-	        if (fail) { break; }
-	      } catch (e) {
-	        /* noop */
-	      }
-	    }
+	    for (var i = 0; i < blocklists.length; i++) {
+	      regex = blocklists[i];
+	      fail = regex.test(template);
+	      tested++;
+	      if (fail) break;
+	    } // ensure at least one test was run.
+
 
-	    // ensure at least one test was run.
 	    if (!tested) {
-	      regex = new RegExp('.*\.google(apis)?\..*/(vt|kh)[\?/].*([xyz]=.*){3}.*');
+	      regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
 	      fail = regex.test(template);
 	    }
 
 	    baseLayer.source(!fail ? d : background.findSource('none'));
-	    dispatch$1.call('change');
+	    dispatch.call('change');
 	    background.updateImagery();
 	    return background;
 	  };
 
-
 	  background.findSource = function (id) {
-	    if (!id || !_imageryIndex) { return null; }   // called before init()?
-	    return _imageryIndex.backgrounds.find(function (d) { return d.id && d.id === id; });
-	  };
+	    if (!id || !_imageryIndex) return null; // called before init()?
 
+	    return _imageryIndex.backgrounds.find(function (d) {
+	      return d.id && d.id === id;
+	    });
+	  };
 
 	  background.bing = function () {
 	    background.baseLayerSource(background.findSource('Bing'));
 	  };
 
-
 	  background.showsLayer = function (d) {
 	    var currSource = baseLayer.source();
-	    if (!d || !currSource) { return false; }
-	    return d.id === currSource.id || _overlayLayers.some(function (layer) { return d.id === layer.source().id; });
+	    if (!d || !currSource) return false;
+	    return d.id === currSource.id || _overlayLayers.some(function (layer) {
+	      return d.id === layer.source().id;
+	    });
 	  };
 
-
 	  background.overlayLayerSources = function () {
-	    return _overlayLayers.map(function (layer) { return layer.source(); });
+	    return _overlayLayers.map(function (layer) {
+	      return layer.source();
+	    });
 	  };
 
-
 	  background.toggleOverlayLayer = function (d) {
 	    var layer;
+
 	    for (var i = 0; i < _overlayLayers.length; i++) {
 	      layer = _overlayLayers[i];
+
 	      if (layer.source() === d) {
 	        _overlayLayers.splice(i, 1);
-	        dispatch$1.call('change');
+
+	        dispatch.call('change');
 	        background.updateImagery();
 	        return;
 	      }
 	    }
 
-	    layer = rendererTileLayer(context)
-	      .source(d)
-	      .projection(context.projection)
-	      .dimensions(baseLayer.dimensions()
-	    );
+	    layer = rendererTileLayer(context).source(d).projection(context.projection).dimensions(baseLayer.dimensions());
 
 	    _overlayLayers.push(layer);
-	    dispatch$1.call('change');
+
+	    dispatch.call('change');
 	    background.updateImagery();
 	  };
 
-
 	  background.nudge = function (d, zoom) {
 	    var currSource = baseLayer.source();
+
 	    if (currSource) {
 	      currSource.nudge(d, zoom);
-	      dispatch$1.call('change');
+	      dispatch.call('change');
 	      background.updateImagery();
 	    }
+
 	    return background;
 	  };
 
-
-	  background.offset = function(d) {
+	  background.offset = function (d) {
 	    var currSource = baseLayer.source();
+
 	    if (!arguments.length) {
-	      return (currSource && currSource.offset()) || [0, 0];
+	      return currSource && currSource.offset() || [0, 0];
 	    }
+
 	    if (currSource) {
 	      currSource.offset(d);
-	      dispatch$1.call('change');
+	      dispatch.call('change');
 	      background.updateImagery();
 	    }
+
 	    return background;
 	  };
 
-
-	  background.brightness = function(d) {
-	    if (!arguments.length) { return _brightness; }
+	  background.brightness = function (d) {
+	    if (!arguments.length) return _brightness;
 	    _brightness = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
+	    if (context.mode()) dispatch.call('change');
 	    return background;
 	  };
 
-
-	  background.contrast = function(d) {
-	    if (!arguments.length) { return _contrast; }
+	  background.contrast = function (d) {
+	    if (!arguments.length) return _contrast;
 	    _contrast = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
+	    if (context.mode()) dispatch.call('change');
 	    return background;
 	  };
 
-
-	  background.saturation = function(d) {
-	    if (!arguments.length) { return _saturation; }
+	  background.saturation = function (d) {
+	    if (!arguments.length) return _saturation;
 	    _saturation = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
+	    if (context.mode()) dispatch.call('change');
 	    return background;
 	  };
 
-
-	  background.sharpness = function(d) {
-	    if (!arguments.length) { return _sharpness; }
+	  background.sharpness = function (d) {
+	    if (!arguments.length) return _sharpness;
 	    _sharpness = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
+	    if (context.mode()) dispatch.call('change');
 	    return background;
 	  };
 
 	  var _loadPromise;
 
 	  background.ensureLoaded = function () {
-
-	    if (_loadPromise) { return _loadPromise; }
+	    if (_loadPromise) return _loadPromise;
 
 	    function parseMapParams(qmap) {
-	      if (!qmap) { return false; }
+	      if (!qmap) return false;
 	      var params = qmap.split('/').map(Number);
-	      if (params.length < 3 || params.some(isNaN)) { return false; }
-	      return geoExtent([params[2], params[1]]);  // lon,lat
+	      if (params.length < 3 || params.some(isNaN)) return false;
+	      return geoExtent([params[2], params[1]]); // lon,lat
 	    }
 
 	    var hash = utilStringQs(window.location.hash);
 	    var requested = hash.background || hash.layer;
 	    var extent = parseMapParams(hash.map);
+	    return _loadPromise = ensureImageryIndex().then(function (imageryIndex) {
+	      var first = imageryIndex.backgrounds.length && imageryIndex.backgrounds[0];
+	      var best;
 
-	    return _loadPromise = ensureImageryIndex()
-	      .then(function (imageryIndex) {
-	        var first = imageryIndex.backgrounds.length && imageryIndex.backgrounds[0];
-
-	        var best;
-	        if (!requested && extent) {
-	          best = background.sources(extent).find(function (s) { return s.best(); });
-	        }
-
-	        // Decide which background layer to display
-	        if (requested && requested.indexOf('custom:') === 0) {
-	          var template = requested.replace(/^custom:/, '');
-	          var custom = background.findSource('custom');
-	          background.baseLayerSource(custom.template(template));
-	          corePreferences('background-custom-template', template);
-	        } else {
-	          background.baseLayerSource(
-	            background.findSource(requested) ||
-	            best ||
-	            background.findSource(corePreferences('background-last-used')) ||
-	            background.findSource('Bing') ||
-	            first ||
-	            background.findSource('none')
-	          );
-	        }
-
-	        var locator = imageryIndex.backgrounds.find(function (d) { return d.overlay && d.default; });
-	        if (locator) {
-	          background.toggleOverlayLayer(locator);
-	        }
-
-	        var overlays = (hash.overlays || '').split(',');
-	        overlays.forEach(function (overlay) {
-	          overlay = background.findSource(overlay);
-	          if (overlay) {
-	            background.toggleOverlayLayer(overlay);
-	          }
+	      if (!requested && extent) {
+	        best = background.sources(extent).find(function (s) {
+	          return s.best();
 	        });
-
-	        if (hash.gpx) {
-	          var gpx = context.layers().layer('data');
-	          if (gpx) {
-	            gpx.url(hash.gpx, '.gpx');
-	          }
-	        }
-
-	        if (hash.offset) {
-	          var offset = hash.offset
-	            .replace(/;/g, ',')
-	            .split(',')
-	            .map(function (n) { return !isNaN(n) && n; });
-
-	          if (offset.length === 2) {
-	            background.offset(geoMetersToOffset(offset));
-	          }
-	        }
-	      })
-	      .catch(function () { /* ignore */ });
-	  };
-
-
-	  return utilRebind(background, dispatch$1, 'on');
-	}
-
-	function rendererFeatures(context) {
-	    var dispatch$1 = dispatch('change', 'redraw');
-	    var features = utilRebind({}, dispatch$1, 'on');
-	    var _deferred = new Set();
-
-	    var traffic_roads = {
-	        'motorway': true,
-	        'motorway_link': true,
-	        'trunk': true,
-	        'trunk_link': true,
-	        'primary': true,
-	        'primary_link': true,
-	        'secondary': true,
-	        'secondary_link': true,
-	        'tertiary': true,
-	        'tertiary_link': true,
-	        'residential': true,
-	        'unclassified': true,
-	        'living_street': true
-	    };
-
-	    var service_roads = {
-	        'service': true,
-	        'road': true,
-	        'track': true
-	    };
-
-	    var paths = {
-	        'path': true,
-	        'footway': true,
-	        'cycleway': true,
-	        'bridleway': true,
-	        'steps': true,
-	        'pedestrian': true
-	    };
-
-	    var past_futures = {
-	        'proposed': true,
-	        'construction': true,
-	        'abandoned': true,
-	        'dismantled': true,
-	        'disused': true,
-	        'razed': true,
-	        'demolished': true,
-	        'obliterated': true
-	    };
-
-	    var _cullFactor = 1;
-	    var _cache = {};
-	    var _rules = {};
-	    var _stats = {};
-	    var _keys = [];
-	    var _hidden = [];
-	    var _forceVisible = {};
-
-
-	    function update() {
-	        if (!window.mocha) {
-	            var hash = utilStringQs(window.location.hash);
-	            var disabled = features.disabled();
-	            if (disabled.length) {
-	                hash.disable_features = disabled.join(',');
-	            } else {
-	                delete hash.disable_features;
-	            }
-	            window.location.replace('#' + utilQsString(hash, true));
-	            corePreferences('disabled-features', disabled.join(','));
-	        }
-	        _hidden = features.hidden();
-	        dispatch$1.call('change');
-	        dispatch$1.call('redraw');
-	    }
-
-
-	    function defineRule(k, filter, max) {
-	        var isEnabled = true;
-
-	        _keys.push(k);
-	        _rules[k] = {
-	            filter: filter,
-	            enabled: isEnabled,   // whether the user wants it enabled..
-	            count: 0,
-	            currentMax: (max || Infinity),
-	            defaultMax: (max || Infinity),
-	            enable: function() { this.enabled = true; this.currentMax = this.defaultMax; },
-	            disable: function() { this.enabled = false; this.currentMax = 0; },
-	            hidden: function() {
-	                return (this.count === 0 && !this.enabled) ||
-	                    this.count > this.currentMax * _cullFactor;
-	            },
-	            autoHidden: function() { return this.hidden() && this.currentMax > 0; }
-	        };
-	    }
-
-
-	    defineRule('points', function isPoint(tags, geometry) {
-	        return geometry === 'point';
-	    }, 200);
-
-	    defineRule('traffic_roads', function isTrafficRoad(tags) {
-	        return traffic_roads[tags.highway];
-	    });
-
-	    defineRule('service_roads', function isServiceRoad(tags) {
-	        return service_roads[tags.highway];
-	    });
-
-	    defineRule('paths', function isPath(tags) {
-	        return paths[tags.highway];
-	    });
-
-	    defineRule('buildings', function isBuilding(tags) {
-	        return (
-	            (!!tags.building && tags.building !== 'no') ||
-	            tags.parking === 'multi-storey' ||
-	            tags.parking === 'sheds' ||
-	            tags.parking === 'carports' ||
-	            tags.parking === 'garage_boxes'
-	        );
-	    }, 250);
-
-	    defineRule('building_parts', function isBuildingPart(tags) {
-	        return tags['building:part'];
-	    });
-
-	    defineRule('indoor', function isIndoor(tags) {
-	        return tags.indoor;
-	    });
-
-	    defineRule('landuse', function isLanduse(tags, geometry) {
-	        return geometry === 'area' &&
-	            !_rules.buildings.filter(tags) &&
-	            !_rules.building_parts.filter(tags) &&
-	            !_rules.indoor.filter(tags) &&
-	            !_rules.water.filter(tags) &&
-	            !_rules.pistes.filter(tags);
-	    });
-
-	    defineRule('boundaries', function isBoundary(tags) {
-	        return (
-	            !!tags.boundary
-	        ) && !(
-	            traffic_roads[tags.highway] ||
-	            service_roads[tags.highway] ||
-	            paths[tags.highway] ||
-	            tags.waterway ||
-	            tags.railway ||
-	            tags.landuse ||
-	            tags.natural ||
-	            tags.building ||
-	            tags.power
-	        );
-	    });
-
-	    defineRule('water', function isWater(tags) {
-	        return (
-	            !!tags.waterway ||
-	            tags.natural === 'water' ||
-	            tags.natural === 'coastline' ||
-	            tags.natural === 'bay' ||
-	            tags.landuse === 'pond' ||
-	            tags.landuse === 'basin' ||
-	            tags.landuse === 'reservoir' ||
-	            tags.landuse === 'salt_pond'
-	        );
-	    });
-
-	    defineRule('rail', function isRail(tags) {
-	        return (
-	            !!tags.railway ||
-	            tags.landuse === 'railway'
-	        ) && !(
-	            traffic_roads[tags.highway] ||
-	            service_roads[tags.highway] ||
-	            paths[tags.highway]
-	        );
-	    });
-
-	    defineRule('pistes', function isPiste(tags) {
-	        return tags['piste:type'];
-	    });
-
-	    defineRule('aerialways', function isPiste(tags) {
-	        return tags.aerialway &&
-	            tags.aerialway !== 'yes' &&
-	            tags.aerialway !== 'station';
-	    });
-
-	    defineRule('power', function isPower(tags) {
-	        return !!tags.power;
-	    });
-
-	    // contains a past/future tag, but not in active use as a road/path/cycleway/etc..
-	    defineRule('past_future', function isPastFuture(tags) {
-	        if (
-	            traffic_roads[tags.highway] ||
-	            service_roads[tags.highway] ||
-	            paths[tags.highway]
-	        ) { return false; }
-
-	        var strings = Object.keys(tags);
-
-	        for (var i = 0; i < strings.length; i++) {
-	            var s = strings[i];
-	            if (past_futures[s] || past_futures[tags[s]]) { return true; }
-	        }
-	        return false;
-	    });
-
-	    // Lines or areas that don't match another feature filter.
-	    // IMPORTANT: The 'others' feature must be the last one defined,
-	    //   so that code in getMatches can skip this test if `hasMatch = true`
-	    defineRule('others', function isOther(tags, geometry) {
-	        return (geometry === 'line' || geometry === 'area');
-	    });
+	      } // Decide which background layer to display
 
 
+	      if (requested && requested.indexOf('custom:') === 0) {
+	        var template = requested.replace(/^custom:/, '');
+	        var custom = background.findSource('custom');
+	        background.baseLayerSource(custom.template(template));
+	        corePreferences('background-custom-template', template);
+	      } else {
+	        background.baseLayerSource(background.findSource(requested) || best || background.findSource(corePreferences('background-last-used')) || background.findSource('Bing') || first || background.findSource('none'));
+	      }
 
-	    features.features = function() {
-	        return _rules;
-	    };
-
+	      var locator = imageryIndex.backgrounds.find(function (d) {
+	        return d.overlay && d["default"];
+	      });
 
-	    features.keys = function() {
-	        return _keys;
-	    };
+	      if (locator) {
+	        background.toggleOverlayLayer(locator);
+	      }
 
+	      var overlays = (hash.overlays || '').split(',');
+	      overlays.forEach(function (overlay) {
+	        overlay = background.findSource(overlay);
 
-	    features.enabled = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return _rules[k].enabled; });
+	        if (overlay) {
+	          background.toggleOverlayLayer(overlay);
 	        }
-	        return _rules[k] && _rules[k].enabled;
-	    };
+	      });
 
+	      if (hash.gpx) {
+	        var gpx = context.layers().layer('data');
 
-	    features.disabled = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return !_rules[k].enabled; });
+	        if (gpx) {
+	          gpx.url(hash.gpx, '.gpx');
 	        }
-	        return _rules[k] && !_rules[k].enabled;
-	    };
+	      }
 
+	      if (hash.offset) {
+	        var offset = hash.offset.replace(/;/g, ',').split(',').map(function (n) {
+	          return !isNaN(n) && n;
+	        });
 
-	    features.hidden = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return _rules[k].hidden(); });
+	        if (offset.length === 2) {
+	          background.offset(geoMetersToOffset(offset));
 	        }
-	        return _rules[k] && _rules[k].hidden();
-	    };
-
+	      }
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  };
 
-	    features.autoHidden = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return _rules[k].autoHidden(); });
-	        }
-	        return _rules[k] && _rules[k].autoHidden();
-	    };
+	  return utilRebind(background, dispatch, 'on');
+	}
 
+	function rendererFeatures(context) {
+	  var dispatch = dispatch$8('change', 'redraw');
+	  var features = utilRebind({}, dispatch, 'on');
 
-	    features.enable = function(k) {
-	        if (_rules[k] && !_rules[k].enabled) {
-	            _rules[k].enable();
-	            update();
-	        }
-	    };
+	  var _deferred = new Set();
 
-	    features.enableAll = function() {
-	        var didEnable = false;
-	        for (var k in _rules) {
-	            if (!_rules[k].enabled) {
-	                didEnable = true;
-	                _rules[k].enable();
-	            }
-	        }
-	        if (didEnable) { update(); }
-	    };
+	  var traffic_roads = {
+	    'motorway': true,
+	    'motorway_link': true,
+	    'trunk': true,
+	    'trunk_link': true,
+	    'primary': true,
+	    'primary_link': true,
+	    'secondary': true,
+	    'secondary_link': true,
+	    'tertiary': true,
+	    'tertiary_link': true,
+	    'residential': true,
+	    'unclassified': true,
+	    'living_street': true
+	  };
+	  var service_roads = {
+	    'service': true,
+	    'road': true,
+	    'track': true
+	  };
+	  var paths = {
+	    'path': true,
+	    'footway': true,
+	    'cycleway': true,
+	    'bridleway': true,
+	    'steps': true,
+	    'pedestrian': true
+	  };
+	  var past_futures = {
+	    'proposed': true,
+	    'construction': true,
+	    'abandoned': true,
+	    'dismantled': true,
+	    'disused': true,
+	    'razed': true,
+	    'demolished': true,
+	    'obliterated': true
+	  };
+	  var _cullFactor = 1;
+	  var _cache = {};
+	  var _rules = {};
+	  var _stats = {};
+	  var _keys = [];
+	  var _hidden = [];
+	  var _forceVisible = {};
 
+	  function update() {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
+	      var disabled = features.disabled();
 
-	    features.disable = function(k) {
-	        if (_rules[k] && _rules[k].enabled) {
-	            _rules[k].disable();
-	            update();
-	        }
-	    };
+	      if (disabled.length) {
+	        hash.disable_features = disabled.join(',');
+	      } else {
+	        delete hash.disable_features;
+	      }
 
-	    features.disableAll = function() {
-	        var didDisable = false;
-	        for (var k in _rules) {
-	            if (_rules[k].enabled) {
-	                didDisable = true;
-	                _rules[k].disable();
-	            }
-	        }
-	        if (didDisable) { update(); }
-	    };
+	      window.location.replace('#' + utilQsString(hash, true));
+	      corePreferences('disabled-features', disabled.join(','));
+	    }
 
+	    _hidden = features.hidden();
+	    dispatch.call('change');
+	    dispatch.call('redraw');
+	  }
 
-	    features.toggle = function(k) {
-	        if (_rules[k]) {
-	            (function(f) { return f.enabled ? f.disable() : f.enable(); }(_rules[k]));
-	            update();
-	        }
-	    };
+	  function defineRule(k, filter, max) {
+	    var isEnabled = true;
 
+	    _keys.push(k);
 
-	    features.resetStats = function() {
-	        for (var i = 0; i < _keys.length; i++) {
-	            _rules[_keys[i]].count = 0;
-	        }
-	        dispatch$1.call('change');
+	    _rules[k] = {
+	      filter: filter,
+	      enabled: isEnabled,
+	      // whether the user wants it enabled..
+	      count: 0,
+	      currentMax: max || Infinity,
+	      defaultMax: max || Infinity,
+	      enable: function enable() {
+	        this.enabled = true;
+	        this.currentMax = this.defaultMax;
+	      },
+	      disable: function disable() {
+	        this.enabled = false;
+	        this.currentMax = 0;
+	      },
+	      hidden: function hidden() {
+	        return this.count === 0 && !this.enabled || this.count > this.currentMax * _cullFactor;
+	      },
+	      autoHidden: function autoHidden() {
+	        return this.hidden() && this.currentMax > 0;
+	      }
 	    };
+	  }
 
+	  defineRule('points', function isPoint(tags, geometry) {
+	    return geometry === 'point';
+	  }, 200);
+	  defineRule('traffic_roads', function isTrafficRoad(tags) {
+	    return traffic_roads[tags.highway];
+	  });
+	  defineRule('service_roads', function isServiceRoad(tags) {
+	    return service_roads[tags.highway];
+	  });
+	  defineRule('paths', function isPath(tags) {
+	    return paths[tags.highway];
+	  });
+	  defineRule('buildings', function isBuilding(tags) {
+	    return !!tags.building && tags.building !== 'no' || tags.parking === 'multi-storey' || tags.parking === 'sheds' || tags.parking === 'carports' || tags.parking === 'garage_boxes';
+	  }, 250);
+	  defineRule('building_parts', function isBuildingPart(tags) {
+	    return tags['building:part'];
+	  });
+	  defineRule('indoor', function isIndoor(tags) {
+	    return tags.indoor;
+	  });
+	  defineRule('landuse', function isLanduse(tags, geometry) {
+	    return geometry === 'area' && !_rules.buildings.filter(tags) && !_rules.building_parts.filter(tags) && !_rules.indoor.filter(tags) && !_rules.water.filter(tags) && !_rules.pistes.filter(tags);
+	  });
+	  defineRule('boundaries', function isBoundary(tags) {
+	    return !!tags.boundary && !(traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway] || tags.waterway || tags.railway || tags.landuse || tags.natural || tags.building || tags.power);
+	  });
+	  defineRule('water', function isWater(tags) {
+	    return !!tags.waterway || tags.natural === 'water' || tags.natural === 'coastline' || tags.natural === 'bay' || tags.landuse === 'pond' || tags.landuse === 'basin' || tags.landuse === 'reservoir' || tags.landuse === 'salt_pond';
+	  });
+	  defineRule('rail', function isRail(tags) {
+	    return (!!tags.railway || tags.landuse === 'railway') && !(traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]);
+	  });
+	  defineRule('pistes', function isPiste(tags) {
+	    return tags['piste:type'];
+	  });
+	  defineRule('aerialways', function isPiste(tags) {
+	    return tags.aerialway && tags.aerialway !== 'yes' && tags.aerialway !== 'station';
+	  });
+	  defineRule('power', function isPower(tags) {
+	    return !!tags.power;
+	  }); // contains a past/future tag, but not in active use as a road/path/cycleway/etc..
 
-	    features.gatherStats = function(d, resolver, dimensions) {
-	        var needsRedraw = false;
-	        var types = utilArrayGroupBy(d, 'type');
-	        var entities = [].concat(types.relation || [], types.way || [], types.node || []);
-	        var currHidden, geometry, matches, i, j;
-
-	        for (i = 0; i < _keys.length; i++) {
-	            _rules[_keys[i]].count = 0;
-	        }
-
-	        // adjust the threshold for point/building culling based on viewport size..
-	        // a _cullFactor of 1 corresponds to a 1000x1000px viewport..
-	        _cullFactor = dimensions[0] * dimensions[1] / 1000000;
-
-	        for (i = 0; i < entities.length; i++) {
-	            geometry = entities[i].geometry(resolver);
-	            matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
-	            for (j = 0; j < matches.length; j++) {
-	                _rules[matches[j]].count++;
-	            }
-	        }
-
-	        currHidden = features.hidden();
-	        if (currHidden !== _hidden) {
-	            _hidden = currHidden;
-	            needsRedraw = true;
-	            dispatch$1.call('change');
-	        }
-
-	        return needsRedraw;
-	    };
+	  defineRule('past_future', function isPastFuture(tags) {
+	    if (traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]) {
+	      return false;
+	    }
 
+	    var strings = Object.keys(tags);
 
-	    features.stats = function() {
-	        for (var i = 0; i < _keys.length; i++) {
-	            _stats[_keys[i]] = _rules[_keys[i]].count;
-	        }
+	    for (var i = 0; i < strings.length; i++) {
+	      var s = strings[i];
 
-	        return _stats;
-	    };
+	      if (past_futures[s] || past_futures[tags[s]]) {
+	        return true;
+	      }
+	    }
 
+	    return false;
+	  }); // Lines or areas that don't match another feature filter.
+	  // IMPORTANT: The 'others' feature must be the last one defined,
+	  //   so that code in getMatches can skip this test if `hasMatch = true`
 
-	    features.clear = function(d) {
-	        for (var i = 0; i < d.length; i++) {
-	            features.clearEntity(d[i]);
-	        }
-	    };
+	  defineRule('others', function isOther(tags, geometry) {
+	    return geometry === 'line' || geometry === 'area';
+	  });
 
+	  features.features = function () {
+	    return _rules;
+	  };
 
-	    features.clearEntity = function(entity) {
-	        delete _cache[osmEntity.key(entity)];
-	    };
+	  features.keys = function () {
+	    return _keys;
+	  };
 
+	  features.enabled = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return _rules[k].enabled;
+	      });
+	    }
 
-	    features.reset = function() {
-	        Array.from(_deferred).forEach(function(handle) {
-	            window.cancelIdleCallback(handle);
-	            _deferred.delete(handle);
-	        });
+	    return _rules[k] && _rules[k].enabled;
+	  };
 
-	        _cache = {};
-	    };
+	  features.disabled = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return !_rules[k].enabled;
+	      });
+	    }
 
-	    // only certain relations are worth checking
-	    function relationShouldBeChecked(relation) {
-	        // multipolygon features have `area` geometry and aren't checked here
-	        return relation.tags.type === 'boundary';
-	    }
-
-	    features.getMatches = function(entity, resolver, geometry) {
-	        if (geometry === 'vertex' ||
-	            (geometry === 'relation' && !relationShouldBeChecked(entity))) { return {}; }
-
-	        var ent = osmEntity.key(entity);
-	        if (!_cache[ent]) {
-	            _cache[ent] = {};
-	        }
-
-	        if (!_cache[ent].matches) {
-	            var matches = {};
-	            var hasMatch = false;
-
-	            for (var i = 0; i < _keys.length; i++) {
-	                if (_keys[i] === 'others') {
-	                    if (hasMatch) { continue; }
-
-	                    // If an entity...
-	                    //   1. is a way that hasn't matched other 'interesting' feature rules,
-	                    if (entity.type === 'way') {
-	                        var parents = features.getParents(entity, resolver, geometry);
-
-	                        //   2a. belongs only to a single multipolygon relation
-	                        if ((parents.length === 1 && parents[0].isMultipolygon()) ||
-	                            // 2b. or belongs only to boundary relations
-	                            (parents.length > 0 && parents.every(function(parent) { return parent.tags.type === 'boundary'; }))) {
-
-	                            // ...then match whatever feature rules the parent relation has matched.
-	                            // see #2548, #2887
-	                            //
-	                            // IMPORTANT:
-	                            // For this to work, getMatches must be called on relations before ways.
-	                            //
-	                            var pkey = osmEntity.key(parents[0]);
-	                            if (_cache[pkey] && _cache[pkey].matches) {
-	                                matches = Object.assign({}, _cache[pkey].matches);  // shallow copy
-	                                continue;
-	                            }
-	                        }
-	                    }
-	                }
+	    return _rules[k] && !_rules[k].enabled;
+	  };
 
-	                if (_rules[_keys[i]].filter(entity.tags, geometry)) {
-	                    matches[_keys[i]] = hasMatch = true;
-	                }
-	            }
-	            _cache[ent].matches = matches;
-	        }
+	  features.hidden = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return _rules[k].hidden();
+	      });
+	    }
 
-	        return _cache[ent].matches;
-	    };
+	    return _rules[k] && _rules[k].hidden();
+	  };
 
+	  features.autoHidden = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return _rules[k].autoHidden();
+	      });
+	    }
 
-	    features.getParents = function(entity, resolver, geometry) {
-	        if (geometry === 'point') { return []; }
+	    return _rules[k] && _rules[k].autoHidden();
+	  };
 
-	        var ent = osmEntity.key(entity);
-	        if (!_cache[ent]) {
-	            _cache[ent] = {};
-	        }
+	  features.enable = function (k) {
+	    if (_rules[k] && !_rules[k].enabled) {
+	      _rules[k].enable();
 
-	        if (!_cache[ent].parents) {
-	            var parents = [];
-	            if (geometry === 'vertex') {
-	                parents = resolver.parentWays(entity);
-	            } else {   // 'line', 'area', 'relation'
-	                parents = resolver.parentRelations(entity);
-	            }
-	            _cache[ent].parents = parents;
-	        }
-	        return _cache[ent].parents;
-	    };
+	      update();
+	    }
+	  };
 
+	  features.enableAll = function () {
+	    var didEnable = false;
 
-	    features.isHiddenPreset = function(preset, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!preset.tags) { return false; }
+	    for (var k in _rules) {
+	      if (!_rules[k].enabled) {
+	        didEnable = true;
 
-	        var test = preset.setTags({}, geometry);
-	        for (var key in _rules) {
-	            if (_rules[key].filter(test, geometry)) {
-	                if (_hidden.indexOf(key) !== -1) {
-	                    return key;
-	                }
-	                return false;
-	            }
-	        }
-	        return false;
-	    };
+	        _rules[k].enable();
+	      }
+	    }
 
+	    if (didEnable) update();
+	  };
 
-	    features.isHiddenFeature = function(entity, resolver, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!entity.version) { return false; }
-	        if (_forceVisible[entity.id]) { return false; }
+	  features.disable = function (k) {
+	    if (_rules[k] && _rules[k].enabled) {
+	      _rules[k].disable();
 
-	        var matches = Object.keys(features.getMatches(entity, resolver, geometry));
-	        return matches.length && matches.every(function(k) { return features.hidden(k); });
-	    };
+	      update();
+	    }
+	  };
 
+	  features.disableAll = function () {
+	    var didDisable = false;
 
-	    features.isHiddenChild = function(entity, resolver, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!entity.version || geometry === 'point') { return false; }
-	        if (_forceVisible[entity.id]) { return false; }
+	    for (var k in _rules) {
+	      if (_rules[k].enabled) {
+	        didDisable = true;
 
-	        var parents = features.getParents(entity, resolver, geometry);
-	        if (!parents.length) { return false; }
+	        _rules[k].disable();
+	      }
+	    }
 
-	        for (var i = 0; i < parents.length; i++) {
-	            if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
-	                return false;
-	            }
-	        }
-	        return true;
-	    };
+	    if (didDisable) update();
+	  };
 
+	  features.toggle = function (k) {
+	    if (_rules[k]) {
+	      (function (f) {
+	        return f.enabled ? f.disable() : f.enable();
+	      })(_rules[k]);
 
-	    features.hasHiddenConnections = function(entity, resolver) {
-	        if (!_hidden.length) { return false; }
+	      update();
+	    }
+	  };
 
-	        var childNodes, connections;
-	        if (entity.type === 'midpoint') {
-	            childNodes = [resolver.entity(entity.edge[0]), resolver.entity(entity.edge[1])];
-	            connections = [];
-	        } else {
-	            childNodes = entity.nodes ? resolver.childNodes(entity) : [];
-	            connections = features.getParents(entity, resolver, entity.geometry(resolver));
-	        }
+	  features.resetStats = function () {
+	    for (var i = 0; i < _keys.length; i++) {
+	      _rules[_keys[i]].count = 0;
+	    }
 
-	        // gather ways connected to child nodes..
-	        connections = childNodes.reduce(function(result, e) {
-	            return resolver.isShared(e) ? utilArrayUnion(result, resolver.parentWays(e)) : result;
-	        }, connections);
+	    dispatch.call('change');
+	  };
 
-	        return connections.some(function(e) {
-	            return features.isHidden(e, resolver, e.geometry(resolver));
-	        });
-	    };
+	  features.gatherStats = function (d, resolver, dimensions) {
+	    var needsRedraw = false;
+	    var types = utilArrayGroupBy(d, 'type');
+	    var entities = [].concat(types.relation || [], types.way || [], types.node || []);
+	    var currHidden, geometry, matches, i, j;
 
+	    for (i = 0; i < _keys.length; i++) {
+	      _rules[_keys[i]].count = 0;
+	    } // adjust the threshold for point/building culling based on viewport size..
+	    // a _cullFactor of 1 corresponds to a 1000x1000px viewport..
 
-	    features.isHidden = function(entity, resolver, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!entity.version) { return false; }
 
-	        var fn = (geometry === 'vertex' ? features.isHiddenChild : features.isHiddenFeature);
-	        return fn(entity, resolver, geometry);
-	    };
+	    _cullFactor = dimensions[0] * dimensions[1] / 1000000;
 
+	    for (i = 0; i < entities.length; i++) {
+	      geometry = entities[i].geometry(resolver);
+	      matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
 
-	    features.filter = function(d, resolver) {
-	        if (!_hidden.length) { return d; }
+	      for (j = 0; j < matches.length; j++) {
+	        _rules[matches[j]].count++;
+	      }
+	    }
 
-	        var result = [];
-	        for (var i = 0; i < d.length; i++) {
-	            var entity = d[i];
-	            if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
-	                result.push(entity);
-	            }
-	        }
-	        return result;
-	    };
+	    currHidden = features.hidden();
 
+	    if (currHidden !== _hidden) {
+	      _hidden = currHidden;
+	      needsRedraw = true;
+	      dispatch.call('change');
+	    }
 
-	    features.forceVisible = function(entityIDs) {
-	        if (!arguments.length) { return Object.keys(_forceVisible); }
+	    return needsRedraw;
+	  };
 
-	        _forceVisible = {};
-	        for (var i = 0; i < entityIDs.length; i++) {
-	            _forceVisible[entityIDs[i]] = true;
-	            var entity = context.hasEntity(entityIDs[i]);
-	            if (entity && entity.type === 'relation') {
-	                // also show relation members (one level deep)
-	                for (var j in entity.members) {
-	                    _forceVisible[entity.members[j].id] = true;
-	                }
-	            }
-	        }
-	        return features;
-	    };
+	  features.stats = function () {
+	    for (var i = 0; i < _keys.length; i++) {
+	      _stats[_keys[i]] = _rules[_keys[i]].count;
+	    }
 
+	    return _stats;
+	  };
 
-	    features.init = function() {
-	        var storage = corePreferences('disabled-features');
-	        if (storage) {
-	            var storageDisabled = storage.replace(/;/g, ',').split(',');
-	            storageDisabled.forEach(features.disable);
-	        }
+	  features.clear = function (d) {
+	    for (var i = 0; i < d.length; i++) {
+	      features.clearEntity(d[i]);
+	    }
+	  };
 
-	        var hash = utilStringQs(window.location.hash);
-	        if (hash.disable_features) {
-	            var hashDisabled = hash.disable_features.replace(/;/g, ',').split(',');
-	            hashDisabled.forEach(features.disable);
-	        }
-	    };
+	  features.clearEntity = function (entity) {
+	    delete _cache[osmEntity.key(entity)];
+	  };
 
+	  features.reset = function () {
+	    Array.from(_deferred).forEach(function (handle) {
+	      window.cancelIdleCallback(handle);
 
-	    // warm up the feature matching cache upon merging fetched data
-	    context.history().on('merge.features', function(newEntities) {
-	        if (!newEntities) { return; }
-	        var handle = window.requestIdleCallback(function() {
-	            var graph = context.graph();
-	            var types = utilArrayGroupBy(newEntities, 'type');
-	            // ensure that getMatches is called on relations before ways
-	            var entities = [].concat(types.relation || [], types.way || [], types.node || []);
-	            for (var i = 0; i < entities.length; i++) {
-	                var geometry = entities[i].geometry(graph);
-	                features.getMatches(entities[i], graph, geometry);
-	            }
-	        });
-	        _deferred.add(handle);
+	      _deferred["delete"](handle);
 	    });
+	    _cache = {};
+	  }; // only certain relations are worth checking
 
 
-	    return features;
-	}
-
-	// Touch targets control which other vertices we can drag a vertex onto.
-	//
-	// - the activeID - nope
-	// - 1 away (adjacent) to the activeID - yes (vertices will be merged)
-	// - 2 away from the activeID - nope (would create a self intersecting segment)
-	// - all others on a linear way - yes
-	// - all others on a closed way - nope (would create a self intersecting polygon)
-	//
-	// returns
-	// 0 = active vertex - no touch/connect
-	// 1 = passive vertex - yes touch/connect
-	// 2 = adjacent vertex - yes but pay attention segmenting a line here
-	//
-	function svgPassiveVertex(node, graph, activeID) {
-	    if (!activeID) { return 1; }
-	    if (activeID === node.id) { return 0; }
-
-	    var parents = graph.parentWays(node);
-
-	    var i, j, nodes, isClosed, ix1, ix2, ix3, ix4, max;
+	  function relationShouldBeChecked(relation) {
+	    // multipolygon features have `area` geometry and aren't checked here
+	    return relation.tags.type === 'boundary';
+	  }
 
-	    for (i = 0; i < parents.length; i++) {
-	        nodes = parents[i].nodes;
-	        isClosed = parents[i].isClosed();
-	        for (j = 0; j < nodes.length; j++) {   // find this vertex, look nearby
-	            if (nodes[j] === node.id) {
-	                ix1 = j - 2;
-	                ix2 = j - 1;
-	                ix3 = j + 1;
-	                ix4 = j + 2;
-
-	                if (isClosed) {  // wraparound if needed
-	                    max = nodes.length - 1;
-	                    if (ix1 < 0)   { ix1 = max + ix1; }
-	                    if (ix2 < 0)   { ix2 = max + ix2; }
-	                    if (ix3 > max) { ix3 = ix3 - max; }
-	                    if (ix4 > max) { ix4 = ix4 - max; }
-	                }
+	  features.getMatches = function (entity, resolver, geometry) {
+	    if (geometry === 'vertex' || geometry === 'relation' && !relationShouldBeChecked(entity)) return {};
+	    var ent = osmEntity.key(entity);
 
-	                if (nodes[ix1] === activeID) { return 0; }        // no - prevent self intersect
-	                else if (nodes[ix2] === activeID) { return 2; }   // ok - adjacent
-	                else if (nodes[ix3] === activeID) { return 2; }   // ok - adjacent
-	                else if (nodes[ix4] === activeID) { return 0; }   // no - prevent self intersect
-	                else if (isClosed && nodes.indexOf(activeID) !== -1) { return 0; }  // no - prevent self intersect
-	            }
-	        }
+	    if (!_cache[ent]) {
+	      _cache[ent] = {};
 	    }
 
-	    return 1;   // ok
-	}
-
-
-	function svgMarkerSegments(projection, graph, dt,
-	                                  shouldReverse,
-	                                  bothDirections) {
-	    return function(entity) {
-	        var i = 0;
-	        var offset = dt;
-	        var segments = [];
-	        var clip = d3_geoIdentity().clipExtent(projection.clipExtent()).stream;
-	        var coordinates = graph.childNodes(entity).map(function(n) { return n.loc; });
-	        var a, b;
-
-	        if (shouldReverse(entity)) {
-	            coordinates.reverse();
-	        }
-
-	        d3_geoStream({
-	            type: 'LineString',
-	            coordinates: coordinates
-	        }, projection.stream(clip({
-	            lineStart: function() {},
-	            lineEnd: function() { a = null; },
-	            point: function(x, y) {
-	                b = [x, y];
-
-	                if (a) {
-	                    var span = geoVecLength(a, b) - offset;
-
-	                    if (span >= 0) {
-	                        var heading = geoVecAngle(a, b);
-	                        var dx = dt * Math.cos(heading);
-	                        var dy = dt * Math.sin(heading);
-	                        var p = [
-	                            a[0] + offset * Math.cos(heading),
-	                            a[1] + offset * Math.sin(heading)
-	                        ];
-
-	                        // gather coordinates
-	                        var coord = [a, p];
-	                        for (span -= dt; span >= 0; span -= dt) {
-	                            p = geoVecAdd(p, [dx, dy]);
-	                            coord.push(p);
-	                        }
-	                        coord.push(b);
-
-	                        // generate svg paths
-	                        var segment = '';
-	                        var j;
-
-	                        for (j = 0; j < coord.length; j++) {
-	                            segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
-	                        }
-	                        segments.push({ id: entity.id, index: i++, d: segment });
-
-	                        if (bothDirections(entity)) {
-	                            segment = '';
-	                            for (j = coord.length - 1; j >= 0; j--) {
-	                                segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
-	                            }
-	                            segments.push({ id: entity.id, index: i++, d: segment });
-	                        }
-	                    }
-
-	                    offset = -span;
-	                }
-
-	                a = b;
-	            }
-	        })));
-
-	        return segments;
-	    };
-	}
-
-
-	function svgPath(projection, graph, isArea) {
-
-	    // Explanation of magic numbers:
-	    // "padding" here allows space for strokes to extend beyond the viewport,
-	    // so that the stroke isn't drawn along the edge of the viewport when
-	    // the shape is clipped.
-	    //
-	    // When drawing lines, pad viewport by 5px.
-	    // When drawing areas, pad viewport by 65px in each direction to allow
-	    // for 60px area fill stroke (see ".fill-partial path.fill" css rule)
-
-	    var cache = {};
-	    var padding = isArea ? 65 : 5;
-	    var viewport = projection.clipExtent();
-	    var paddedExtent = [
-	        [viewport[0][0] - padding, viewport[0][1] - padding],
-	        [viewport[1][0] + padding, viewport[1][1] + padding]
-	    ];
-	    var clip = d3_geoIdentity().clipExtent(paddedExtent).stream;
-	    var project = projection.stream;
-	    var path = d3_geoPath()
-	        .projection({stream: function(output) { return project(clip(output)); }});
-
-	    var svgpath = function(entity) {
-	        if (entity.id in cache) {
-	            return cache[entity.id];
-	        } else {
-	            return cache[entity.id] = path(entity.asGeoJSON(graph));
-	        }
-	    };
-
-	    svgpath.geojson = function(d) {
-	        if (d.__featurehash__ !== undefined) {
-	            if (d.__featurehash__ in cache) {
-	                return cache[d.__featurehash__];
-	            } else {
-	                return cache[d.__featurehash__] = path(d);
-	            }
-	        } else {
-	            return path(d);
-	        }
-	    };
-
-	    return svgpath;
-	}
-
-
-	function svgPointTransform(projection) {
-	    var svgpoint = function(entity) {
-	        // http://jsperf.com/short-array-join
-	        var pt = projection(entity.loc);
-	        return 'translate(' + pt[0] + ',' + pt[1] + ')';
-	    };
-
-	    svgpoint.geojson = function(d) {
-	        return svgpoint(d.properties.entity);
-	    };
+	    if (!_cache[ent].matches) {
+	      var matches = {};
+	      var hasMatch = false;
 
-	    return svgpoint;
-	}
+	      for (var i = 0; i < _keys.length; i++) {
+	        if (_keys[i] === 'others') {
+	          if (hasMatch) continue; // If an entity...
+	          //   1. is a way that hasn't matched other 'interesting' feature rules,
 
+	          if (entity.type === 'way') {
+	            var parents = features.getParents(entity, resolver, geometry); //   2a. belongs only to a single multipolygon relation
 
-	function svgRelationMemberTags(graph) {
-	    return function(entity) {
-	        var tags = entity.tags;
-	        var shouldCopyMultipolygonTags = !entity.hasInterestingTags();
-	        graph.parentRelations(entity).forEach(function(relation) {
-	            var type = relation.tags.type;
-	            if ((type === 'multipolygon' && shouldCopyMultipolygonTags) || type === 'boundary') {
-	                tags = Object.assign({}, relation.tags, tags);
-	            }
-	        });
-	        return tags;
-	    };
-	}
+	            if (parents.length === 1 && parents[0].isMultipolygon() || // 2b. or belongs only to boundary relations
+	            parents.length > 0 && parents.every(function (parent) {
+	              return parent.tags.type === 'boundary';
+	            })) {
+	              // ...then match whatever feature rules the parent relation has matched.
+	              // see #2548, #2887
+	              //
+	              // IMPORTANT:
+	              // For this to work, getMatches must be called on relations before ways.
+	              //
+	              var pkey = osmEntity.key(parents[0]);
 
+	              if (_cache[pkey] && _cache[pkey].matches) {
+	                matches = Object.assign({}, _cache[pkey].matches); // shallow copy
 
-	function svgSegmentWay(way, graph, activeID) {
-	    // When there is no activeID, we can memoize this expensive computation
-	    if (activeID === undefined) {
-	        return graph.transient(way, 'waySegments', getWaySegments);
-	    } else {
-	        return getWaySegments();
-	    }
-
-	    function getWaySegments() {
-	        var isActiveWay = (way.nodes.indexOf(activeID) !== -1);
-	        var features = { passive: [], active: [] };
-	        var start = {};
-	        var end = {};
-	        var node, type;
-
-	        for (var i = 0; i < way.nodes.length; i++) {
-	            node = graph.entity(way.nodes[i]);
-	            type = svgPassiveVertex(node, graph, activeID);
-	            end = { node: node, type: type };
-
-	            if (start.type !== undefined) {
-	                if (start.node.id === activeID || end.node.id === activeID) ; else if (isActiveWay && (start.type === 2 || end.type === 2)) {   // one adjacent vertex
-	                    pushActive(start, end, i);
-	                } else if (start.type === 0 && end.type === 0) {   // both active vertices
-	                    pushActive(start, end, i);
-	                } else {
-	                    pushPassive(start, end, i);
-	                }
+	                continue;
+	              }
 	            }
-
-	            start = end;
+	          }
 	        }
 
-	        return features;
-
-	        function pushActive(start, end, index) {
-	            features.active.push({
-	                type: 'Feature',
-	                id: way.id + '-' + index + '-nope',
-	                properties: {
-	                    nope: true,
-	                    target: true,
-	                    entity: way,
-	                    nodes: [start.node, end.node],
-	                    index: index
-	                },
-	                geometry: {
-	                    type: 'LineString',
-	                    coordinates: [start.node.loc, end.node.loc]
-	                }
-	            });
+	        if (_rules[_keys[i]].filter(entity.tags, geometry)) {
+	          matches[_keys[i]] = hasMatch = true;
 	        }
+	      }
 
-	        function pushPassive(start, end, index) {
-	            features.passive.push({
-	                type: 'Feature',
-	                id: way.id + '-' + index,
-	                properties: {
-	                    target: true,
-	                    entity: way,
-	                    nodes: [start.node, end.node],
-	                    index: index
-	                },
-	                geometry: {
-	                    type: 'LineString',
-	                    coordinates: [start.node.loc, end.node.loc]
-	                }
-	            });
-	        }
+	      _cache[ent].matches = matches;
 	    }
-	}
 
-	function svgTagClasses() {
-	    var primaries = [
-	        'building', 'highway', 'railway', 'waterway', 'aeroway', 'aerialway',
-	        'piste:type', 'boundary', 'power', 'amenity', 'natural', 'landuse',
-	        'leisure', 'military', 'place', 'man_made', 'route', 'attraction',
-	        'building:part', 'indoor'
-	    ];
-	    var statuses = [
-	        // nonexistent, might be built
-	        'proposed', 'planned',
-	        // under maintentance or between groundbreaking and opening
-	        'construction',
-	        // existent but not functional
-	        'disused',
-	        // dilapidated to nonexistent
-	        'abandoned',
-	        // nonexistent, still may appear in imagery
-	        'dismantled', 'razed', 'demolished', 'obliterated',
-	        // existent occasionally, e.g. stormwater drainage basin
-	        'intermittent'
-	    ];
-	    var secondaries = [
-	        'oneway', 'bridge', 'tunnel', 'embankment', 'cutting', 'barrier',
-	        'surface', 'tracktype', 'footway', 'crossing', 'service', 'sport',
-	        'public_transport', 'location', 'parking', 'golf', 'type', 'leisure',
-	        'man_made', 'indoor'
-	    ];
-	    var _tags = function(entity) { return entity.tags; };
-
-
-	    var tagClasses = function(selection) {
-	        selection.each(function tagClassesEach(entity) {
-	            var value = this.className;
-
-	            if (value.baseVal !== undefined) {
-	                value = value.baseVal;
-	            }
-
-	            var t = _tags(entity);
-
-	            var computed = tagClasses.getClassesString(t, value);
-
-	            if (computed !== value) {
-	                select(this).attr('class', computed);
-	            }
-	        });
-	    };
+	    return _cache[ent].matches;
+	  };
 
+	  features.getParents = function (entity, resolver, geometry) {
+	    if (geometry === 'point') return [];
+	    var ent = osmEntity.key(entity);
 
-	    tagClasses.getClassesString = function(t, value) {
-	        var primary, status;
-	        var i, j, k, v;
+	    if (!_cache[ent]) {
+	      _cache[ent] = {};
+	    }
 
-	        // in some situations we want to render perimeter strokes a certain way
-	        var overrideGeometry;
-	        if (/\bstroke\b/.test(value)) {
-	            if (!!t.barrier && t.barrier !== 'no') {
-	                overrideGeometry = 'line';
-	            }
-	        }
+	    if (!_cache[ent].parents) {
+	      var parents = [];
 
-	        // preserve base classes (nothing with `tag-`)
-	        var classes = value.trim().split(/\s+/)
-	            .filter(function(klass) {
-	                return klass.length && !/^tag-/.test(klass);
-	            })
-	            .map(function(klass) {  // special overrides for some perimeter strokes
-	                return (klass === 'line' || klass === 'area') ? (overrideGeometry || klass) : klass;
-	            });
+	      if (geometry === 'vertex') {
+	        parents = resolver.parentWays(entity);
+	      } else {
+	        // 'line', 'area', 'relation'
+	        parents = resolver.parentRelations(entity);
+	      }
 
-	        // pick at most one primary classification tag..
-	        for (i = 0; i < primaries.length; i++) {
-	            k = primaries[i];
-	            v = t[k];
-	            if (!v || v === 'no') { continue; }
+	      _cache[ent].parents = parents;
+	    }
 
-	            if (k === 'piste:type') {  // avoid a ':' in the class name
-	                k = 'piste';
-	            } else if (k === 'building:part') {  // avoid a ':' in the class name
-	                k = 'building_part';
-	            }
+	    return _cache[ent].parents;
+	  };
 
-	            primary = k;
-	            if (statuses.indexOf(v) !== -1) {   // e.g. `railway=abandoned`
-	                status = v;
-	                classes.push('tag-' + k);
-	            } else {
-	                classes.push('tag-' + k);
-	                classes.push('tag-' + k + '-' + v);
-	            }
+	  features.isHiddenPreset = function (preset, geometry) {
+	    if (!_hidden.length) return false;
+	    if (!preset.tags) return false;
+	    var test = preset.setTags({}, geometry);
 
-	            break;
+	    for (var key in _rules) {
+	      if (_rules[key].filter(test, geometry)) {
+	        if (_hidden.indexOf(key) !== -1) {
+	          return key;
 	        }
 
-	        if (!primary) {
-	            for (i = 0; i < statuses.length; i++) {
-	                for (j = 0; j < primaries.length; j++) {
-	                    k = statuses[i] + ':' + primaries[j];  // e.g. `demolished:building=yes`
-	                    v = t[k];
-	                    if (!v || v === 'no') { continue; }
+	        return false;
+	      }
+	    }
 
-	                    status = statuses[i];
-	                    break;
-	                }
-	            }
-	        }
+	    return false;
+	  };
 
-	        // add at most one status tag, only if relates to primary tag..
-	        if (!status) {
-	            for (i = 0; i < statuses.length; i++) {
-	                k = statuses[i];
-	                v = t[k];
-	                if (!v || v === 'no') { continue; }
+	  features.isHiddenFeature = function (entity, resolver, geometry) {
+	    if (!_hidden.length) return false;
+	    if (!entity.version) return false;
+	    if (_forceVisible[entity.id]) return false;
+	    var matches = Object.keys(features.getMatches(entity, resolver, geometry));
+	    return matches.length && matches.every(function (k) {
+	      return features.hidden(k);
+	    });
+	  };
 
-	                if (v === 'yes') {   // e.g. `railway=rail + abandoned=yes`
-	                    status = k;
-	                }
-	                else if (primary && primary === v) {  // e.g. `railway=rail + abandoned=railway`
-	                    status = k;
-	                } else if (!primary && primaries.indexOf(v) !== -1) {  // e.g. `abandoned=railway`
-	                    status = k;
-	                    primary = v;
-	                    classes.push('tag-' + v);
-	                }  // else ignore e.g.  `highway=path + abandoned=railway`
-
-	                if (status) { break; }
-	            }
-	        }
+	  features.isHiddenChild = function (entity, resolver, geometry) {
+	    if (!_hidden.length) return false;
+	    if (!entity.version || geometry === 'point') return false;
+	    if (_forceVisible[entity.id]) return false;
+	    var parents = features.getParents(entity, resolver, geometry);
+	    if (!parents.length) return false;
 
-	        if (status) {
-	            classes.push('tag-status');
-	            classes.push('tag-status-' + status);
-	        }
+	    for (var i = 0; i < parents.length; i++) {
+	      if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
+	        return false;
+	      }
+	    }
 
-	        // add any secondary tags
-	        for (i = 0; i < secondaries.length; i++) {
-	            k = secondaries[i];
-	            v = t[k];
-	            if (!v || v === 'no' || k === primary) { continue; }
-	            classes.push('tag-' + k);
-	            classes.push('tag-' + k + '-' + v);
-	        }
+	    return true;
+	  };
 
-	        // For highways, look for surface tagging..
-	        if ((primary === 'highway' && !osmPathHighwayTagValues[t.highway]) || primary === 'aeroway') {
-	            var surface = t.highway === 'track' ? 'unpaved' : 'paved';
-	            for (k in t) {
-	                v = t[k];
-	                if (k in osmPavedTags) {
-	                    surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
-	                }
-	                if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
-	                    surface = 'semipaved';
-	                }
-	            }
-	            classes.push('tag-' + surface);
-	        }
+	  features.hasHiddenConnections = function (entity, resolver) {
+	    if (!_hidden.length) return false;
+	    var childNodes, connections;
 
-	        // If this is a wikidata-tagged item, add a class for that..
-	        if (t.wikidata || t['brand:wikidata']) {
-	            classes.push('tag-wikidata');
-	        }
+	    if (entity.type === 'midpoint') {
+	      childNodes = [resolver.entity(entity.edge[0]), resolver.entity(entity.edge[1])];
+	      connections = [];
+	    } else {
+	      childNodes = entity.nodes ? resolver.childNodes(entity) : [];
+	      connections = features.getParents(entity, resolver, entity.geometry(resolver));
+	    } // gather ways connected to child nodes..
 
-	        return classes.join(' ').trim();
-	    };
 
+	    connections = childNodes.reduce(function (result, e) {
+	      return resolver.isShared(e) ? utilArrayUnion(result, resolver.parentWays(e)) : result;
+	    }, connections);
+	    return connections.some(function (e) {
+	      return features.isHidden(e, resolver, e.geometry(resolver));
+	    });
+	  };
 
-	    tagClasses.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
-	        return tagClasses;
-	    };
+	  features.isHidden = function (entity, resolver, geometry) {
+	    if (!_hidden.length) return false;
+	    if (!entity.version) return false;
+	    var fn = geometry === 'vertex' ? features.isHiddenChild : features.isHiddenFeature;
+	    return fn(entity, resolver, geometry);
+	  };
 
-	    return tagClasses;
-	}
+	  features.filter = function (d, resolver) {
+	    if (!_hidden.length) return d;
+	    var result = [];
 
-	// Patterns only work in Firefox when set directly on element.
-	// (This is not a bug: https://bugzilla.mozilla.org/show_bug.cgi?id=750632)
-	var patterns = {
-	    // tag - pattern name
-	    // -or-
-	    // tag - value - pattern name
-	    // -or-
-	    // tag - value - rules (optional tag-values, pattern name)
-	    // (matches earlier rules first, so fallback should be last entry)
-	    amenity: {
-	        grave_yard: 'cemetery',
-	        fountain: 'water_standing'
-	    },
-	    landuse: {
-	        cemetery: [
-	            { religion: 'christian', pattern: 'cemetery_christian' },
-	            { religion: 'buddhist', pattern: 'cemetery_buddhist' },
-	            { religion: 'muslim', pattern: 'cemetery_muslim' },
-	            { religion: 'jewish', pattern: 'cemetery_jewish' },
-	            { pattern: 'cemetery' }
-	        ],
-	        construction: 'construction',
-	        farmland: 'farmland',
-	        farmyard: 'farmyard',
-	        forest: [
-	            { leaf_type: 'broadleaved', pattern: 'forest_broadleaved' },
-	            { leaf_type: 'needleleaved', pattern: 'forest_needleleaved' },
-	            { leaf_type: 'leafless', pattern: 'forest_leafless' },
-	            { pattern: 'forest' } // same as 'leaf_type:mixed'
-	        ],
-	        grave_yard: 'cemetery',
-	        grass: [
-	            { golf: 'green', pattern: 'golf_green' },
-	            { pattern: 'grass' } ],
-	        landfill: 'landfill',
-	        meadow: 'meadow',
-	        military: 'construction',
-	        orchard: 'orchard',
-	        quarry: 'quarry',
-	        vineyard: 'vineyard'
-	    },
-	    natural: {
-	        beach: 'beach',
-	        grassland: 'grass',
-	        sand: 'beach',
-	        scrub: 'scrub',
-	        water: [
-	            { water: 'pond', pattern: 'pond' },
-	            { water: 'reservoir', pattern: 'water_standing' },
-	            { pattern: 'waves' }
-	        ],
-	        wetland: [
-	            { wetland: 'marsh', pattern: 'wetland_marsh' },
-	            { wetland: 'swamp', pattern: 'wetland_swamp' },
-	            { wetland: 'bog', pattern: 'wetland_bog' },
-	            { wetland: 'reedbed', pattern: 'wetland_reedbed' },
-	            { pattern: 'wetland' }
-	        ],
-	        wood: [
-	            { leaf_type: 'broadleaved', pattern: 'forest_broadleaved' },
-	            { leaf_type: 'needleleaved', pattern: 'forest_needleleaved' },
-	            { leaf_type: 'leafless', pattern: 'forest_leafless' },
-	            { pattern: 'forest' } // same as 'leaf_type:mixed'
-	        ]
-	    },
-	    traffic_calming: {
-	        island: [
-	            { surface: 'grass', pattern: 'grass' } ],
-	        chicane: [
-	            { surface: 'grass', pattern: 'grass' } ],
-	        choker: [
-	            { surface: 'grass', pattern: 'grass' } ]
-	    }
-	};
+	    for (var i = 0; i < d.length; i++) {
+	      var entity = d[i];
 
-	function svgTagPattern(tags) {
-	    // Skip pattern filling if this is a building (buildings don't get patterns applied)
-	    if (tags.building && tags.building !== 'no') {
-	        return null;
+	      if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
+	        result.push(entity);
+	      }
 	    }
 
-	    for (var tag in patterns) {
-	        var entityValue = tags[tag];
-	        if (!entityValue) { continue; }
-
-	        if (typeof patterns[tag] === 'string') { // extra short syntax (just tag) - pattern name
-	            return 'pattern-' + patterns[tag];
-	        } else {
-	            var values = patterns[tag];
-	            for (var value in values) {
-	                if (entityValue !== value) { continue; }
+	    return result;
+	  };
 
-	                var rules = values[value];
-	                if (typeof rules === 'string') { // short syntax - pattern name
-	                    return 'pattern-' + rules;
-	                }
+	  features.forceVisible = function (entityIDs) {
+	    if (!arguments.length) return Object.keys(_forceVisible);
+	    _forceVisible = {};
 
-	                // long syntax - rule array
-	                for (var ruleKey in rules) {
-	                    var rule = rules[ruleKey];
-
-	                    var pass = true;
-	                    for (var criterion in rule) {
-	                        if (criterion !== 'pattern') { // reserved for pattern name
-	                            // The only rule is a required tag-value pair
-	                            var v = tags[criterion];
-	                            if (!v || v !== rule[criterion]) {
-	                                pass = false;
-	                                break;
-	                            }
-	                        }
-	                    }
+	    for (var i = 0; i < entityIDs.length; i++) {
+	      _forceVisible[entityIDs[i]] = true;
+	      var entity = context.hasEntity(entityIDs[i]);
 
-	                    if (pass) {
-	                        return 'pattern-' + rule.pattern;
-	                    }
-	                }
-	            }
+	      if (entity && entity.type === 'relation') {
+	        // also show relation members (one level deep)
+	        for (var j in entity.members) {
+	          _forceVisible[entity.members[j].id] = true;
 	        }
+	      }
 	    }
 
-	    return null;
-	}
-
-	function svgAreas(projection, context) {
+	    return features;
+	  };
 
+	  features.init = function () {
+	    var storage = corePreferences('disabled-features');
 
-	    function getPatternStyle(tags) {
-	        var imageID = svgTagPattern(tags);
-	        if (imageID) {
-	            return 'url("#ideditor-' + imageID + '")';
-	        }
-	        return '';
+	    if (storage) {
+	      var storageDisabled = storage.replace(/;/g, ',').split(',');
+	      storageDisabled.forEach(features.disable);
 	    }
 
+	    var hash = utilStringQs(window.location.hash);
 
-	    function drawTargets(selection, graph, entities, filter) {
-	        var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-	        var getPath = svgPath(projection).geojson;
-	        var activeID = context.activeID();
-	        var base = context.history().base();
-
-	        // The targets and nopes will be MultiLineString sub-segments of the ways
-	        var data = { targets: [], nopes: [] };
-
-	        entities.forEach(function(way) {
-	            var features = svgSegmentWay(way, graph, activeID);
-	            data.targets.push.apply(data.targets, features.passive);
-	            data.nopes.push.apply(data.nopes, features.active);
-	        });
-
-
-	        // Targets allow hover and vertex snapping
-	        var targetData = data.targets.filter(getPath);
-	        var targets = selection.selectAll('.area.target-allowed')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(targetData, function key(d) { return d.id; });
-
-	        // exit
-	        targets.exit()
-	            .remove();
-
-	        var segmentWasEdited = function(d) {
-	            var wayID = d.properties.entity.id;
-	            // if the whole line was edited, don't draw segment changes
-	            if (!base.entities[wayID] ||
-	                !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-	                return false;
-	            }
-	            return d.properties.nodes.some(function(n) {
-	                return !base.entities[n.id] ||
-	                       !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
-	            });
-	        };
-
-	        // enter/update
-	        targets.enter()
-	            .append('path')
-	            .merge(targets)
-	            .attr('d', getPath)
-	            .attr('class', function(d) { return 'way area target target-allowed ' + targetClass + d.id; })
-	            .classed('segment-edited', segmentWasEdited);
-
-
-	        // NOPE
-	        var nopeData = data.nopes.filter(getPath);
-	        var nopes = selection.selectAll('.area.target-nope')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(nopeData, function key(d) { return d.id; });
-
-	        // exit
-	        nopes.exit()
-	            .remove();
-
-	        // enter/update
-	        nopes.enter()
-	            .append('path')
-	            .merge(nopes)
-	            .attr('d', getPath)
-	            .attr('class', function(d) { return 'way area target target-nope ' + nopeClass + d.id; })
-	            .classed('segment-edited', segmentWasEdited);
-	    }
-
-
-	    function drawAreas(selection, graph, entities, filter) {
-	        var path = svgPath(projection, graph, true);
-	        var areas = {};
-	        var multipolygon;
-	        var base = context.history().base();
-
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-	            if (entity.geometry(graph) !== 'area') { continue; }
-
-	            multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
-	            if (multipolygon) {
-	                areas[multipolygon.id] = {
-	                    entity: multipolygon.mergeTags(entity.tags),
-	                    area: Math.abs(entity.area(graph))
-	                };
-	            } else if (!areas[entity.id]) {
-	                areas[entity.id] = {
-	                    entity: entity,
-	                    area: Math.abs(entity.area(graph))
-	                };
-	            }
-	        }
-
-	        var fills = Object.values(areas).filter(function hasPath(a) { return path(a.entity); });
-	        fills.sort(function areaSort(a, b) { return b.area - a.area; });
-	        fills = fills.map(function(a) { return a.entity; });
-
-	        var strokes = fills.filter(function(area) { return area.type === 'way'; });
-
-	        var data = {
-	            clip: fills,
-	            shadow: strokes,
-	            stroke: strokes,
-	            fill: fills
-	        };
-
-	        var clipPaths = context.surface().selectAll('defs').selectAll('.clipPath-osm')
-	           .filter(filter)
-	           .data(data.clip, osmEntity.key);
-
-	        clipPaths.exit()
-	           .remove();
-
-	        var clipPathsEnter = clipPaths.enter()
-	           .append('clipPath')
-	           .attr('class', 'clipPath-osm')
-	           .attr('id', function(entity) { return 'ideditor-' + entity.id + '-clippath'; });
-
-	        clipPathsEnter
-	           .append('path');
-
-	        clipPaths.merge(clipPathsEnter)
-	           .selectAll('path')
-	           .attr('d', path);
-
-
-	        var drawLayer = selection.selectAll('.layer-osm.areas');
-	        var touchLayer = selection.selectAll('.layer-touch.areas');
-
-	        // Draw areas..
-	        var areagroup = drawLayer
-	            .selectAll('g.areagroup')
-	            .data(['fill', 'shadow', 'stroke']);
-
-	        areagroup = areagroup.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'areagroup area-' + d; })
-	            .merge(areagroup);
-
-	        var paths = areagroup
-	            .selectAll('path')
-	            .filter(filter)
-	            .data(function(layer) { return data[layer]; }, osmEntity.key);
-
-	        paths.exit()
-	            .remove();
-
-
-	        var fillpaths = selection.selectAll('.area-fill path.area').nodes();
-	        var bisect = d3_bisector(function(node) { return -node.__data__.area(graph); }).left;
-
-	        function sortedByArea(entity) {
-	            if (this._parent.__data__ === 'fill') {
-	                return fillpaths[bisect(fillpaths, -entity.area(graph))];
-	            }
-	        }
-
-	        paths = paths.enter()
-	            .insert('path', sortedByArea)
-	            .merge(paths)
-	            .each(function(entity) {
-	                var layer = this.parentNode.__data__;
-	                this.setAttribute('class', entity.type + ' area ' + layer + ' ' + entity.id);
-
-	                if (layer === 'fill') {
-	                    this.setAttribute('clip-path', 'url(#ideditor-' + entity.id + '-clippath)');
-	                    this.style.fill = this.style.stroke = getPatternStyle(entity.tags);
-	                }
-	            })
-	            .classed('added', function(d) {
-	                return !base.entities[d.id];
-	            })
-	            .classed('geometry-edited', function(d) {
-	                return graph.entities[d.id] &&
-	                    base.entities[d.id] &&
-	                    !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
-	            })
-	            .classed('retagged', function(d) {
-	                return graph.entities[d.id] &&
-	                    base.entities[d.id] &&
-	                    !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-	            })
-	            .call(svgTagClasses())
-	            .attr('d', path);
-
-
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, data.stroke, filter);
-	    }
-
-	    return drawAreas;
-	}
-
-	//[4]   	NameStartChar	   ::=   	":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
-	//[4a]   	NameChar	   ::=   	NameStartChar | "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]
-	//[5]   	Name	   ::=   	NameStartChar (NameChar)*
-	var nameStartChar = /[A-Z_a-z\xC0-\xD6\xD8-\xF6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD]/;//\u10000-\uEFFFF
-	var nameChar = new RegExp("[\\-\\.0-9"+nameStartChar.source.slice(1,-1)+"\\u00B7\\u0300-\\u036F\\u203F-\\u2040]");
-	var tagNamePattern = new RegExp('^'+nameStartChar.source+nameChar.source+'*(?:\:'+nameStartChar.source+nameChar.source+'*)?$');
-	//var tagNamePattern = /^[a-zA-Z_][\w\-\.]*(?:\:[a-zA-Z_][\w\-\.]*)?$/
-	//var handlers = 'resolveEntity,getExternalSubset,characters,endDocument,endElement,endPrefixMapping,ignorableWhitespace,processingInstruction,setDocumentLocator,skippedEntity,startDocument,startElement,startPrefixMapping,notationDecl,unparsedEntityDecl,error,fatalError,warning,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,comment,endCDATA,endDTD,endEntity,startCDATA,startDTD,startEntity'.split(',')
-
-	//S_TAG,	S_ATTR,	S_EQ,	S_ATTR_NOQUOT_VALUE
-	//S_ATTR_SPACE,	S_ATTR_END,	S_TAG_SPACE, S_TAG_CLOSE
-	var S_TAG = 0;//tag name offerring
-	var S_ATTR = 1;//attr name offerring 
-	var S_ATTR_SPACE=2;//attr name end and space offer
-	var S_EQ = 3;//=space?
-	var S_ATTR_NOQUOT_VALUE = 4;//attr value(no quot value only)
-	var S_ATTR_END = 5;//attr value end and no space(quot end)
-	var S_TAG_SPACE = 6;//(attr value end || tag end ) && (space offer)
-	var S_TAG_CLOSE = 7;//closed el<el />
-
-	function XMLReader(){
-		
-	}
-
-	XMLReader.prototype = {
-		parse:function(source,defaultNSMap,entityMap){
-			var domBuilder = this.domBuilder;
-			domBuilder.startDocument();
-			_copy(defaultNSMap ,defaultNSMap = {});
-			parse(source,defaultNSMap,entityMap,
-					domBuilder,this.errorHandler);
-			domBuilder.endDocument();
-		}
-	};
-	function parse(source,defaultNSMapCopy,entityMap,domBuilder,errorHandler){
-		function fixedFromCharCode(code) {
-			// String.prototype.fromCharCode does not supports
-			// > 2 bytes unicode chars directly
-			if (code > 0xffff) {
-				code -= 0x10000;
-				var surrogate1 = 0xd800 + (code >> 10)
-					, surrogate2 = 0xdc00 + (code & 0x3ff);
-
-				return String.fromCharCode(surrogate1, surrogate2);
-			} else {
-				return String.fromCharCode(code);
-			}
-		}
-		function entityReplacer(a){
-			var k = a.slice(1,-1);
-			if(k in entityMap){
-				return entityMap[k]; 
-			}else if(k.charAt(0) === '#'){
-				return fixedFromCharCode(parseInt(k.substr(1).replace('x','0x')))
-			}else {
-				errorHandler.error('entity not found:'+a);
-				return a;
-			}
-		}
-		function appendText(end){//has some bugs
-			if(end>start){
-				var xt = source.substring(start,end).replace(/&#?\w+;/g,entityReplacer);
-				locator&&position(start);
-				domBuilder.characters(xt,0,end-start);
-				start = end;
-			}
-		}
-		function position(p,m){
-			while(p>=lineEnd && (m = linePattern.exec(source))){
-				lineStart = m.index;
-				lineEnd = lineStart + m[0].length;
-				locator.lineNumber++;
-				//console.log('line++:',locator,startPos,endPos)
-			}
-			locator.columnNumber = p-lineStart+1;
-		}
-		var lineStart = 0;
-		var lineEnd = 0;
-		var linePattern = /.*(?:\r\n?|\n)|.*$/g;
-		var locator = domBuilder.locator;
-		
-		var parseStack = [{currentNSMap:defaultNSMapCopy}];
-		var closeMap = {};
-		var start = 0;
-		while(true){
-			try{
-				var tagStart = source.indexOf('<',start);
-				if(tagStart<0){
-					if(!source.substr(start).match(/^\s*$/)){
-						var doc = domBuilder.doc;
-		    			var text = doc.createTextNode(source.substr(start));
-		    			doc.appendChild(text);
-		    			domBuilder.currentElement = text;
-					}
-					return;
-				}
-				if(tagStart>start){
-					appendText(tagStart);
-				}
-				switch(source.charAt(tagStart+1)){
-				case '/':
-					var end = source.indexOf('>',tagStart+3);
-					var tagName = source.substring(tagStart+2,end);
-					var config = parseStack.pop();
-					if(end<0){
-						
-		        		tagName = source.substring(tagStart+2).replace(/[\s<].*/,'');
-		        		//console.error('#@@@@@@'+tagName)
-		        		errorHandler.error("end tag name: "+tagName+' is not complete:'+config.tagName);
-		        		end = tagStart+1+tagName.length;
-		        	}else if(tagName.match(/\s</)){
-		        		tagName = tagName.replace(/[\s<].*/,'');
-		        		errorHandler.error("end tag name: "+tagName+' maybe not complete');
-		        		end = tagStart+1+tagName.length;
-					}
-					//console.error(parseStack.length,parseStack)
-					//console.error(config);
-					var localNSMap = config.localNSMap;
-					var endMatch = config.tagName == tagName;
-					var endIgnoreCaseMach = endMatch || config.tagName&&config.tagName.toLowerCase() == tagName.toLowerCase();
-			        if(endIgnoreCaseMach){
-			        	domBuilder.endElement(config.uri,config.localName,tagName);
-						if(localNSMap){
-							for(var prefix in localNSMap){
-								domBuilder.endPrefixMapping(prefix) ;
-							}
-						}
-						if(!endMatch){
-			            	errorHandler.fatalError("end tag name: "+tagName+' is not match the current start tagName:'+config.tagName );
-						}
-			        }else {
-			        	parseStack.push(config);
-			        }
-					
-					end++;
-					break;
-					// end elment
-				case '?':// <?...?>
-					locator&&position(tagStart);
-					end = parseInstruction(source,tagStart,domBuilder);
-					break;
-				case '!':// <!doctype,<![CDATA,<!--
-					locator&&position(tagStart);
-					end = parseDCC(source,tagStart,domBuilder,errorHandler);
-					break;
-				default:
-					locator&&position(tagStart);
-					var el = new ElementAttributes();
-					var currentNSMap = parseStack[parseStack.length-1].currentNSMap;
-					//elStartEnd
-					var end = parseElementStartPart(source,tagStart,el,currentNSMap,entityReplacer,errorHandler);
-					var len = el.length;
-					
-					
-					if(!el.closed && fixSelfClosed(source,end,el.tagName,closeMap)){
-						el.closed = true;
-						if(!entityMap.nbsp){
-							errorHandler.warning('unclosed xml attribute');
-						}
-					}
-					if(locator && len){
-						var locator2 = copyLocator(locator,{});
-						//try{//attribute position fixed
-						for(var i = 0;i<len;i++){
-							var a = el[i];
-							position(a.offset);
-							a.locator = copyLocator(locator,{});
-						}
-						//}catch(e){console.error('@@@@@'+e)}
-						domBuilder.locator = locator2;
-						if(appendElement(el,domBuilder,currentNSMap)){
-							parseStack.push(el);
-						}
-						domBuilder.locator = locator;
-					}else {
-						if(appendElement(el,domBuilder,currentNSMap)){
-							parseStack.push(el);
-						}
-					}
-					
-					
-					
-					if(el.uri === 'http://www.w3.org/1999/xhtml' && !el.closed){
-						end = parseHtmlSpecialContent(source,end,el.tagName,entityReplacer,domBuilder);
-					}else {
-						end++;
-					}
-				}
-			}catch(e){
-				errorHandler.error('element parse error: '+e);
-				//errorHandler.error('element parse error: '+e);
-				end = -1;
-				//throw e;
-			}
-			if(end>start){
-				start = end;
-			}else {
-				//TODO: 这里有可能sax回退，有位置错误风险
-				appendText(Math.max(tagStart,start)+1);
-			}
-		}
-	}
-	function copyLocator(f,t){
-		t.lineNumber = f.lineNumber;
-		t.columnNumber = f.columnNumber;
-		return t;
-	}
-
-	/**
-	 * @see #appendElement(source,elStartEnd,el,selfClosed,entityReplacer,domBuilder,parseStack);
-	 * @return end of the elementStartPart(end of elementEndPart for selfClosed el)
-	 */
-	function parseElementStartPart(source,start,el,currentNSMap,entityReplacer,errorHandler){
-		var attrName;
-		var value;
-		var p = ++start;
-		var s = S_TAG;//status
-		while(true){
-			var c = source.charAt(p);
-			switch(c){
-			case '=':
-				if(s === S_ATTR){//attrName
-					attrName = source.slice(start,p);
-					s = S_EQ;
-				}else if(s === S_ATTR_SPACE){
-					s = S_EQ;
-				}else {
-					//fatalError: equal must after attrName or space after attrName
-					throw new Error('attribute equal must after attrName');
-				}
-				break;
-			case '\'':
-			case '"':
-				if(s === S_EQ || s === S_ATTR //|| s == S_ATTR_SPACE
-					){//equal
-					if(s === S_ATTR){
-						errorHandler.warning('attribute value must after "="');
-						attrName = source.slice(start,p);
-					}
-					start = p+1;
-					p = source.indexOf(c,start);
-					if(p>0){
-						value = source.slice(start,p).replace(/&#?\w+;/g,entityReplacer);
-						el.add(attrName,value,start-1);
-						s = S_ATTR_END;
-					}else {
-						//fatalError: no end quot match
-						throw new Error('attribute value no end \''+c+'\' match');
-					}
-				}else if(s == S_ATTR_NOQUOT_VALUE){
-					value = source.slice(start,p).replace(/&#?\w+;/g,entityReplacer);
-					//console.log(attrName,value,start,p)
-					el.add(attrName,value,start);
-					//console.dir(el)
-					errorHandler.warning('attribute "'+attrName+'" missed start quot('+c+')!!');
-					start = p+1;
-					s = S_ATTR_END;
-				}else {
-					//fatalError: no equal before
-					throw new Error('attribute value must after "="');
-				}
-				break;
-			case '/':
-				switch(s){
-				case S_TAG:
-					el.setTagName(source.slice(start,p));
-				case S_ATTR_END:
-				case S_TAG_SPACE:
-				case S_TAG_CLOSE:
-					s =S_TAG_CLOSE;
-					el.closed = true;
-				case S_ATTR_NOQUOT_VALUE:
-				case S_ATTR:
-				case S_ATTR_SPACE:
-					break;
-				//case S_EQ:
-				default:
-					throw new Error("attribute invalid close char('/')")
-				}
-				break;
-			case ''://end document
-				//throw new Error('unexpected end of input')
-				errorHandler.error('unexpected end of input');
-				if(s == S_TAG){
-					el.setTagName(source.slice(start,p));
-				}
-				return p;
-			case '>':
-				switch(s){
-				case S_TAG:
-					el.setTagName(source.slice(start,p));
-				case S_ATTR_END:
-				case S_TAG_SPACE:
-				case S_TAG_CLOSE:
-					break;//normal
-				case S_ATTR_NOQUOT_VALUE://Compatible state
-				case S_ATTR:
-					value = source.slice(start,p);
-					if(value.slice(-1) === '/'){
-						el.closed  = true;
-						value = value.slice(0,-1);
-					}
-				case S_ATTR_SPACE:
-					if(s === S_ATTR_SPACE){
-						value = attrName;
-					}
-					if(s == S_ATTR_NOQUOT_VALUE){
-						errorHandler.warning('attribute "'+value+'" missed quot(")!!');
-						el.add(attrName,value.replace(/&#?\w+;/g,entityReplacer),start);
-					}else {
-						if(currentNSMap[''] !== 'http://www.w3.org/1999/xhtml' || !value.match(/^(?:disabled|checked|selected)$/i)){
-							errorHandler.warning('attribute "'+value+'" missed value!! "'+value+'" instead!!');
-						}
-						el.add(value,value,start);
-					}
-					break;
-				case S_EQ:
-					throw new Error('attribute value missed!!');
-				}
-	//			console.log(tagName,tagNamePattern,tagNamePattern.test(tagName))
-				return p;
-			/*xml space '\x20' | #x9 | #xD | #xA; */
-			case '\u0080':
-				c = ' ';
-			default:
-				if(c<= ' '){//space
-					switch(s){
-					case S_TAG:
-						el.setTagName(source.slice(start,p));//tagName
-						s = S_TAG_SPACE;
-						break;
-					case S_ATTR:
-						attrName = source.slice(start,p);
-						s = S_ATTR_SPACE;
-						break;
-					case S_ATTR_NOQUOT_VALUE:
-						var value = source.slice(start,p).replace(/&#?\w+;/g,entityReplacer);
-						errorHandler.warning('attribute "'+value+'" missed quot(")!!');
-						el.add(attrName,value,start);
-					case S_ATTR_END:
-						s = S_TAG_SPACE;
-						break;
-					//case S_TAG_SPACE:
-					//case S_EQ:
-					//case S_ATTR_SPACE:
-					//	void();break;
-					//case S_TAG_CLOSE:
-						//ignore warning
-					}
-				}else {//not space
-	//S_TAG,	S_ATTR,	S_EQ,	S_ATTR_NOQUOT_VALUE
-	//S_ATTR_SPACE,	S_ATTR_END,	S_TAG_SPACE, S_TAG_CLOSE
-					switch(s){
-					//case S_TAG:void();break;
-					//case S_ATTR:void();break;
-					//case S_ATTR_NOQUOT_VALUE:void();break;
-					case S_ATTR_SPACE:
-						var tagName =  el.tagName;
-						if(currentNSMap[''] !== 'http://www.w3.org/1999/xhtml' || !attrName.match(/^(?:disabled|checked|selected)$/i)){
-							errorHandler.warning('attribute "'+attrName+'" missed value!! "'+attrName+'" instead2!!');
-						}
-						el.add(attrName,attrName,start);
-						start = p;
-						s = S_ATTR;
-						break;
-					case S_ATTR_END:
-						errorHandler.warning('attribute space is required"'+attrName+'"!!');
-					case S_TAG_SPACE:
-						s = S_ATTR;
-						start = p;
-						break;
-					case S_EQ:
-						s = S_ATTR_NOQUOT_VALUE;
-						start = p;
-						break;
-					case S_TAG_CLOSE:
-						throw new Error("elements closed character '/' and '>' must be connected to");
-					}
-				}
-			}//end outer switch
-			//console.log('p++',p)
-			p++;
-		}
-	}
-	/**
-	 * @return true if has new namespace define
-	 */
-	function appendElement(el,domBuilder,currentNSMap){
-		var tagName = el.tagName;
-		var localNSMap = null;
-		//var currentNSMap = parseStack[parseStack.length-1].currentNSMap;
-		var i = el.length;
-		while(i--){
-			var a = el[i];
-			var qName = a.qName;
-			var value = a.value;
-			var nsp = qName.indexOf(':');
-			if(nsp>0){
-				var prefix = a.prefix = qName.slice(0,nsp);
-				var localName = qName.slice(nsp+1);
-				var nsPrefix = prefix === 'xmlns' && localName;
-			}else {
-				localName = qName;
-				prefix = null;
-				nsPrefix = qName === 'xmlns' && '';
-			}
-			//can not set prefix,because prefix !== ''
-			a.localName = localName ;
-			//prefix == null for no ns prefix attribute 
-			if(nsPrefix !== false){//hack!!
-				if(localNSMap == null){
-					localNSMap = {};
-					//console.log(currentNSMap,0)
-					_copy(currentNSMap,currentNSMap={});
-					//console.log(currentNSMap,1)
-				}
-				currentNSMap[nsPrefix] = localNSMap[nsPrefix] = value;
-				a.uri = 'http://www.w3.org/2000/xmlns/';
-				domBuilder.startPrefixMapping(nsPrefix, value); 
-			}
-		}
-		var i = el.length;
-		while(i--){
-			a = el[i];
-			var prefix = a.prefix;
-			if(prefix){//no prefix attribute has no namespace
-				if(prefix === 'xml'){
-					a.uri = 'http://www.w3.org/XML/1998/namespace';
-				}if(prefix !== 'xmlns'){
-					a.uri = currentNSMap[prefix || ''];
-					
-					//{console.log('###'+a.qName,domBuilder.locator.systemId+'',currentNSMap,a.uri)}
-				}
-			}
-		}
-		var nsp = tagName.indexOf(':');
-		if(nsp>0){
-			prefix = el.prefix = tagName.slice(0,nsp);
-			localName = el.localName = tagName.slice(nsp+1);
-		}else {
-			prefix = null;//important!!
-			localName = el.localName = tagName;
-		}
-		//no prefix element has default namespace
-		var ns = el.uri = currentNSMap[prefix || ''];
-		domBuilder.startElement(ns,localName,tagName,el);
-		//endPrefixMapping and startPrefixMapping have not any help for dom builder
-		//localNSMap = null
-		if(el.closed){
-			domBuilder.endElement(ns,localName,tagName);
-			if(localNSMap){
-				for(prefix in localNSMap){
-					domBuilder.endPrefixMapping(prefix); 
-				}
-			}
-		}else {
-			el.currentNSMap = currentNSMap;
-			el.localNSMap = localNSMap;
-			//parseStack.push(el);
-			return true;
-		}
-	}
-	function parseHtmlSpecialContent(source,elStartEnd,tagName,entityReplacer,domBuilder){
-		if(/^(?:script|textarea)$/i.test(tagName)){
-			var elEndStart =  source.indexOf('</'+tagName+'>',elStartEnd);
-			var text = source.substring(elStartEnd+1,elEndStart);
-			if(/[&<]/.test(text)){
-				if(/^script$/i.test(tagName)){
-					//if(!/\]\]>/.test(text)){
-						//lexHandler.startCDATA();
-						domBuilder.characters(text,0,text.length);
-						//lexHandler.endCDATA();
-						return elEndStart;
-					//}
-				}//}else{//text area
-					text = text.replace(/&#?\w+;/g,entityReplacer);
-					domBuilder.characters(text,0,text.length);
-					return elEndStart;
-				//}
-				
-			}
-		}
-		return elStartEnd+1;
-	}
-	function fixSelfClosed(source,elStartEnd,tagName,closeMap){
-		//if(tagName in closeMap){
-		var pos = closeMap[tagName];
-		if(pos == null){
-			//console.log(tagName)
-			pos =  source.lastIndexOf('</'+tagName+'>');
-			if(pos<elStartEnd){//忘记闭合
-				pos = source.lastIndexOf('</'+tagName);
-			}
-			closeMap[tagName] =pos;
-		}
-		return pos<elStartEnd;
-		//} 
-	}
-	function _copy(source,target){
-		for(var n in source){target[n] = source[n];}
-	}
-	function parseDCC(source,start,domBuilder,errorHandler){//sure start with '<!'
-		var next= source.charAt(start+2);
-		switch(next){
-		case '-':
-			if(source.charAt(start + 3) === '-'){
-				var end = source.indexOf('-->',start+4);
-				//append comment source.substring(4,end)//<!--
-				if(end>start){
-					domBuilder.comment(source,start+4,end-start-4);
-					return end+3;
-				}else {
-					errorHandler.error("Unclosed comment");
-					return -1;
-				}
-			}else {
-				//error
-				return -1;
-			}
-		default:
-			if(source.substr(start+3,6) == 'CDATA['){
-				var end = source.indexOf(']]>',start+9);
-				domBuilder.startCDATA();
-				domBuilder.characters(source,start+9,end-start-9);
-				domBuilder.endCDATA(); 
-				return end+3;
-			}
-			//<!DOCTYPE
-			//startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId) 
-			var matchs = split(source,start);
-			var len = matchs.length;
-			if(len>1 && /!doctype/i.test(matchs[0][0])){
-				var name = matchs[1][0];
-				var pubid = len>3 && /^public$/i.test(matchs[2][0]) && matchs[3][0];
-				var sysid = len>4 && matchs[4][0];
-				var lastMatch = matchs[len-1];
-				domBuilder.startDTD(name,pubid && pubid.replace(/^(['"])(.*?)\1$/,'$2'),
-						sysid && sysid.replace(/^(['"])(.*?)\1$/,'$2'));
-				domBuilder.endDTD();
-				
-				return lastMatch.index+lastMatch[0].length
-			}
-		}
-		return -1;
-	}
-
-
-
-	function parseInstruction(source,start,domBuilder){
-		var end = source.indexOf('?>',start);
-		if(end){
-			var match = source.substring(start,end).match(/^<\?(\S*)\s*([\s\S]*?)\s*$/);
-			if(match){
-				var len = match[0].length;
-				domBuilder.processingInstruction(match[1], match[2]) ;
-				return end+2;
-			}else {//error
-				return -1;
-			}
-		}
-		return -1;
-	}
-
-	/**
-	 * @param source
-	 */
-	function ElementAttributes(source){
-		
-	}
-	ElementAttributes.prototype = {
-		setTagName:function(tagName){
-			if(!tagNamePattern.test(tagName)){
-				throw new Error('invalid tagName:'+tagName)
-			}
-			this.tagName = tagName;
-		},
-		add:function(qName,value,offset){
-			if(!tagNamePattern.test(qName)){
-				throw new Error('invalid attribute:'+qName)
-			}
-			this[this.length++] = {qName:qName,value:value,offset:offset};
-		},
-		length:0,
-		getLocalName:function(i){return this[i].localName},
-		getLocator:function(i){return this[i].locator},
-		getQName:function(i){return this[i].qName},
-		getURI:function(i){return this[i].uri},
-		getValue:function(i){return this[i].value}
-	//	,getIndex:function(uri, localName)){
-	//		if(localName){
-	//			
-	//		}else{
-	//			var qName = uri
-	//		}
-	//	},
-	//	getValue:function(){return this.getValue(this.getIndex.apply(this,arguments))},
-	//	getType:function(uri,localName){}
-	//	getType:function(i){},
-	};
-
+	    if (hash.disable_features) {
+	      var hashDisabled = hash.disable_features.replace(/;/g, ',').split(',');
+	      hashDisabled.forEach(features.disable);
+	    }
+	  }; // warm up the feature matching cache upon merging fetched data
 
 
+	  context.history().on('merge.features', function (newEntities) {
+	    if (!newEntities) return;
+	    var handle = window.requestIdleCallback(function () {
+	      var graph = context.graph();
+	      var types = utilArrayGroupBy(newEntities, 'type'); // ensure that getMatches is called on relations before ways
 
-	function _set_proto_(thiz,parent){
-		thiz.__proto__ = parent;
-		return thiz;
-	}
-	if(!(_set_proto_({},_set_proto_.prototype) instanceof _set_proto_)){
-		_set_proto_ = function(thiz,parent){
-			function p(){}		p.prototype = parent;
-			p = new p();
-			for(parent in thiz){
-				p[parent] = thiz[parent];
-			}
-			return p;
-		};
-	}
+	      var entities = [].concat(types.relation || [], types.way || [], types.node || []);
+
+	      for (var i = 0; i < entities.length; i++) {
+	        var geometry = entities[i].geometry(graph);
+	        features.getMatches(entities[i], graph, geometry);
+	      }
+	    });
 
-	function split(source,start){
-		var match;
-		var buf = [];
-		var reg = /'[^']+'|"[^"]+"|[^\s<>\/=]+=?|(\/?\s*>|<)/g;
-		reg.lastIndex = start;
-		reg.exec(source);//skip <
-		while(match = reg.exec(source)){
-			buf.push(match);
-			if(match[1]){ return buf; }
-		}
+	    _deferred.add(handle);
+	  });
+	  return features;
 	}
 
-	var XMLReader_1 = XMLReader;
+	//
+	// - the activeID - nope
+	// - 1 away (adjacent) to the activeID - yes (vertices will be merged)
+	// - 2 away from the activeID - nope (would create a self intersecting segment)
+	// - all others on a linear way - yes
+	// - all others on a closed way - nope (would create a self intersecting polygon)
+	//
+	// returns
+	// 0 = active vertex - no touch/connect
+	// 1 = passive vertex - yes touch/connect
+	// 2 = adjacent vertex - yes but pay attention segmenting a line here
+	//
 
-	var sax = {
-		XMLReader: XMLReader_1
-	};
+	function svgPassiveVertex(node, graph, activeID) {
+	  if (!activeID) return 1;
+	  if (activeID === node.id) return 0;
+	  var parents = graph.parentWays(node);
+	  var i, j, nodes, isClosed, ix1, ix2, ix3, ix4, max;
+
+	  for (i = 0; i < parents.length; i++) {
+	    nodes = parents[i].nodes;
+	    isClosed = parents[i].isClosed();
+
+	    for (j = 0; j < nodes.length; j++) {
+	      // find this vertex, look nearby
+	      if (nodes[j] === node.id) {
+	        ix1 = j - 2;
+	        ix2 = j - 1;
+	        ix3 = j + 1;
+	        ix4 = j + 2;
 
-	/*
-	 * DOM Level 2
-	 * Object DOMException
-	 * @see http://www.w3.org/TR/REC-DOM-Level-1/ecma-script-language-binding.html
-	 * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/ecma-script-binding.html
-	 */
+	        if (isClosed) {
+	          // wraparound if needed
+	          max = nodes.length - 1;
+	          if (ix1 < 0) ix1 = max + ix1;
+	          if (ix2 < 0) ix2 = max + ix2;
+	          if (ix3 > max) ix3 = ix3 - max;
+	          if (ix4 > max) ix4 = ix4 - max;
+	        }
+
+	        if (nodes[ix1] === activeID) return 0; // no - prevent self intersect
+	        else if (nodes[ix2] === activeID) return 2; // ok - adjacent
+	        else if (nodes[ix3] === activeID) return 2; // ok - adjacent
+	        else if (nodes[ix4] === activeID) return 0; // no - prevent self intersect
+	        else if (isClosed && nodes.indexOf(activeID) !== -1) return 0; // no - prevent self intersect
+	      }
+	    }
+	  }
 
-	function copy$2(src,dest){
-		for(var p in src){
-			dest[p] = src[p];
-		}
+	  return 1; // ok
 	}
-	/**
-	^\w+\.prototype\.([_\w]+)\s*=\s*((?:.*\{\s*?[\r\n][\s\S]*?^})|\S.*?(?=[;\r\n]));?
-	^\w+\.prototype\.([_\w]+)\s*=\s*(\S.*?(?=[;\r\n]));?
-	 */
-	function _extends(Class,Super){
-		var pt = Class.prototype;
-		if(Object.create){
-			var ppt = Object.create(Super.prototype);
-			pt.__proto__ = ppt;
-		}
-		if(!(pt instanceof Super)){
-			function t(){}		t.prototype = Super.prototype;
-			t = new t();
-			copy$2(pt,t);
-			Class.prototype = pt = t;
-		}
-		if(pt.constructor != Class){
-			if(typeof Class != 'function'){
-				console.error("unknow Class:"+Class);
-			}
-			pt.constructor = Class;
-		}
-	}
-	var htmlns = 'http://www.w3.org/1999/xhtml' ;
-	// Node Types
-	var NodeType = {};
-	var ELEMENT_NODE                = NodeType.ELEMENT_NODE                = 1;
-	var ATTRIBUTE_NODE              = NodeType.ATTRIBUTE_NODE              = 2;
-	var TEXT_NODE                   = NodeType.TEXT_NODE                   = 3;
-	var CDATA_SECTION_NODE          = NodeType.CDATA_SECTION_NODE          = 4;
-	var ENTITY_REFERENCE_NODE       = NodeType.ENTITY_REFERENCE_NODE       = 5;
-	var ENTITY_NODE                 = NodeType.ENTITY_NODE                 = 6;
-	var PROCESSING_INSTRUCTION_NODE = NodeType.PROCESSING_INSTRUCTION_NODE = 7;
-	var COMMENT_NODE                = NodeType.COMMENT_NODE                = 8;
-	var DOCUMENT_NODE               = NodeType.DOCUMENT_NODE               = 9;
-	var DOCUMENT_TYPE_NODE          = NodeType.DOCUMENT_TYPE_NODE          = 10;
-	var DOCUMENT_FRAGMENT_NODE      = NodeType.DOCUMENT_FRAGMENT_NODE      = 11;
-	var NOTATION_NODE               = NodeType.NOTATION_NODE               = 12;
-
-	// ExceptionCode
-	var ExceptionCode = {};
-	var ExceptionMessage = {};
-	var INDEX_SIZE_ERR              = ExceptionCode.INDEX_SIZE_ERR              = ((ExceptionMessage[1]="Index size error"),1);
-	var DOMSTRING_SIZE_ERR          = ExceptionCode.DOMSTRING_SIZE_ERR          = ((ExceptionMessage[2]="DOMString size error"),2);
-	var HIERARCHY_REQUEST_ERR       = ExceptionCode.HIERARCHY_REQUEST_ERR       = ((ExceptionMessage[3]="Hierarchy request error"),3);
-	var WRONG_DOCUMENT_ERR          = ExceptionCode.WRONG_DOCUMENT_ERR          = ((ExceptionMessage[4]="Wrong document"),4);
-	var INVALID_CHARACTER_ERR       = ExceptionCode.INVALID_CHARACTER_ERR       = ((ExceptionMessage[5]="Invalid character"),5);
-	var NO_DATA_ALLOWED_ERR         = ExceptionCode.NO_DATA_ALLOWED_ERR         = ((ExceptionMessage[6]="No data allowed"),6);
-	var NO_MODIFICATION_ALLOWED_ERR = ExceptionCode.NO_MODIFICATION_ALLOWED_ERR = ((ExceptionMessage[7]="No modification allowed"),7);
-	var NOT_FOUND_ERR               = ExceptionCode.NOT_FOUND_ERR               = ((ExceptionMessage[8]="Not found"),8);
-	var NOT_SUPPORTED_ERR           = ExceptionCode.NOT_SUPPORTED_ERR           = ((ExceptionMessage[9]="Not supported"),9);
-	var INUSE_ATTRIBUTE_ERR         = ExceptionCode.INUSE_ATTRIBUTE_ERR         = ((ExceptionMessage[10]="Attribute in use"),10);
-	//level2
-	var INVALID_STATE_ERR        	= ExceptionCode.INVALID_STATE_ERR        	= ((ExceptionMessage[11]="Invalid state"),11);
-	var SYNTAX_ERR               	= ExceptionCode.SYNTAX_ERR               	= ((ExceptionMessage[12]="Syntax error"),12);
-	var INVALID_MODIFICATION_ERR 	= ExceptionCode.INVALID_MODIFICATION_ERR 	= ((ExceptionMessage[13]="Invalid modification"),13);
-	var NAMESPACE_ERR            	= ExceptionCode.NAMESPACE_ERR           	= ((ExceptionMessage[14]="Invalid namespace"),14);
-	var INVALID_ACCESS_ERR       	= ExceptionCode.INVALID_ACCESS_ERR      	= ((ExceptionMessage[15]="Invalid access"),15);
-
-
-	function DOMException$2(code, message) {
-		if(message instanceof Error){
-			var error = message;
-		}else {
-			error = this;
-			Error.call(this, ExceptionMessage[code]);
-			this.message = ExceptionMessage[code];
-			if(Error.captureStackTrace) { Error.captureStackTrace(this, DOMException$2); }
-		}
-		error.code = code;
-		if(message) { this.message = this.message + ": " + message; }
-		return error;
-	}DOMException$2.prototype = Error.prototype;
-	copy$2(ExceptionCode,DOMException$2);
-	/**
-	 * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-536297177
-	 * The NodeList interface provides the abstraction of an ordered collection of nodes, without defining or constraining how this collection is implemented. NodeList objects in the DOM are live.
-	 * The items in the NodeList are accessible via an integral index, starting from 0.
-	 */
-	function NodeList() {
-	}NodeList.prototype = {
-		/**
-		 * The number of nodes in the list. The range of valid child node indices is 0 to length-1 inclusive.
-		 * @standard level1
-		 */
-		length:0, 
-		/**
-		 * Returns the indexth item in the collection. If index is greater than or equal to the number of nodes in the list, this returns null.
-		 * @standard level1
-		 * @param index  unsigned long 
-		 *   Index into the collection.
-		 * @return Node
-		 * 	The node at the indexth position in the NodeList, or null if that is not a valid index. 
-		 */
-		item: function(index) {
-			return this[index] || null;
-		},
-		toString:function(isHTML,nodeFilter){
-			for(var buf = [], i = 0;i<this.length;i++){
-				serializeToString(this[i],buf,isHTML,nodeFilter);
-			}
-			return buf.join('');
-		}
-	};
-	function LiveNodeList(node,refresh){
-		this._node = node;
-		this._refresh = refresh;
-		_updateLiveList(this);
-	}
-	function _updateLiveList(list){
-		var inc = list._node._inc || list._node.ownerDocument._inc;
-		if(list._inc != inc){
-			var ls = list._refresh(list._node);
-			//console.log(ls.length)
-			__set__(list,'length',ls.length);
-			copy$2(ls,list);
-			list._inc = inc;
-		}
-	}
-	LiveNodeList.prototype.item = function(i){
-		_updateLiveList(this);
-		return this[i];
-	};
-
-	_extends(LiveNodeList,NodeList);
-	/**
-	 * 
-	 * Objects implementing the NamedNodeMap interface are used to represent collections of nodes that can be accessed by name. Note that NamedNodeMap does not inherit from NodeList; NamedNodeMaps are not maintained in any particular order. Objects contained in an object implementing NamedNodeMap may also be accessed by an ordinal index, but this is simply to allow convenient enumeration of the contents of a NamedNodeMap, and does not imply that the DOM specifies an order to these Nodes.
-	 * NamedNodeMap objects in the DOM are live.
-	 * used for attributes or DocumentType entities 
-	 */
-	function NamedNodeMap() {
-	}
-	function _findNodeIndex(list,node){
-		var i = list.length;
-		while(i--){
-			if(list[i] === node){return i}
-		}
-	}
-
-	function _addNamedNode(el,list,newAttr,oldAttr){
-		if(oldAttr){
-			list[_findNodeIndex(list,oldAttr)] = newAttr;
-		}else {
-			list[list.length++] = newAttr;
-		}
-		if(el){
-			newAttr.ownerElement = el;
-			var doc = el.ownerDocument;
-			if(doc){
-				oldAttr && _onRemoveAttribute(doc,el,oldAttr);
-				_onAddAttribute(doc,el,newAttr);
-			}
-		}
-	}
-	function _removeNamedNode(el,list,attr){
-		//console.log('remove attr:'+attr)
-		var i = _findNodeIndex(list,attr);
-		if(i>=0){
-			var lastIndex = list.length-1;
-			while(i<lastIndex){
-				list[i] = list[++i];
-			}
-			list.length = lastIndex;
-			if(el){
-				var doc = el.ownerDocument;
-				if(doc){
-					_onRemoveAttribute(doc,el,attr);
-					attr.ownerElement = null;
-				}
-			}
-		}else {
-			throw DOMException$2(NOT_FOUND_ERR,new Error(el.tagName+'@'+attr))
-		}
-	}
-	NamedNodeMap.prototype = {
-		length:0,
-		item:NodeList.prototype.item,
-		getNamedItem: function(key) {
-	//		if(key.indexOf(':')>0 || key == 'xmlns'){
-	//			return null;
-	//		}
-			//console.log()
-			var i = this.length;
-			while(i--){
-				var attr = this[i];
-				//console.log(attr.nodeName,key)
-				if(attr.nodeName == key){
-					return attr;
-				}
-			}
-		},
-		setNamedItem: function(attr) {
-			var el = attr.ownerElement;
-			if(el && el!=this._ownerElement){
-				throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
-			}
-			var oldAttr = this.getNamedItem(attr.nodeName);
-			_addNamedNode(this._ownerElement,this,attr,oldAttr);
-			return oldAttr;
-		},
-		/* returns Node */
-		setNamedItemNS: function(attr) {// raises: WRONG_DOCUMENT_ERR,NO_MODIFICATION_ALLOWED_ERR,INUSE_ATTRIBUTE_ERR
-			var el = attr.ownerElement, oldAttr;
-			if(el && el!=this._ownerElement){
-				throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
-			}
-			oldAttr = this.getNamedItemNS(attr.namespaceURI,attr.localName);
-			_addNamedNode(this._ownerElement,this,attr,oldAttr);
-			return oldAttr;
-		},
-
-		/* returns Node */
-		removeNamedItem: function(key) {
-			var attr = this.getNamedItem(key);
-			_removeNamedNode(this._ownerElement,this,attr);
-			return attr;
-			
-			
-		},// raises: NOT_FOUND_ERR,NO_MODIFICATION_ALLOWED_ERR
-		
-		//for level2
-		removeNamedItemNS:function(namespaceURI,localName){
-			var attr = this.getNamedItemNS(namespaceURI,localName);
-			_removeNamedNode(this._ownerElement,this,attr);
-			return attr;
-		},
-		getNamedItemNS: function(namespaceURI, localName) {
-			var i = this.length;
-			while(i--){
-				var node = this[i];
-				if(node.localName == localName && node.namespaceURI == namespaceURI){
-					return node;
-				}
-			}
-			return null;
-		}
-	};
-	/**
-	 * @see http://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-102161490
-	 */
-	function DOMImplementation(/* Object */ features) {
-		this._features = {};
-		if (features) {
-			for (var feature in features) {
-				 this._features = features[feature];
-			}
-		}
-	}
-	DOMImplementation.prototype = {
-		hasFeature: function(/* string */ feature, /* string */ version) {
-			var versions = this._features[feature.toLowerCase()];
-			if (versions && (!version || version in versions)) {
-				return true;
-			} else {
-				return false;
-			}
-		},
-		// Introduced in DOM Level 2:
-		createDocument:function(namespaceURI,  qualifiedName, doctype){// raises:INVALID_CHARACTER_ERR,NAMESPACE_ERR,WRONG_DOCUMENT_ERR
-			var doc = new Document();
-			doc.implementation = this;
-			doc.childNodes = new NodeList();
-			doc.doctype = doctype;
-			if(doctype){
-				doc.appendChild(doctype);
-			}
-			if(qualifiedName){
-				var root = doc.createElementNS(namespaceURI,qualifiedName);
-				doc.appendChild(root);
-			}
-			return doc;
-		},
-		// Introduced in DOM Level 2:
-		createDocumentType:function(qualifiedName, publicId, systemId){// raises:INVALID_CHARACTER_ERR,NAMESPACE_ERR
-			var node = new DocumentType();
-			node.name = qualifiedName;
-			node.nodeName = qualifiedName;
-			node.publicId = publicId;
-			node.systemId = systemId;
-			// Introduced in DOM Level 2:
-			//readonly attribute DOMString        internalSubset;
-			
-			//TODO:..
-			//  readonly attribute NamedNodeMap     entities;
-			//  readonly attribute NamedNodeMap     notations;
-			return node;
-		}
-	};
+	function svgMarkerSegments(projection, graph, dt, shouldReverse, bothDirections) {
+	  return function (entity) {
+	    var i = 0;
+	    var offset = dt;
+	    var segments = [];
+	    var clip = d3_geoIdentity().clipExtent(projection.clipExtent()).stream;
+	    var coordinates = graph.childNodes(entity).map(function (n) {
+	      return n.loc;
+	    });
+	    var a, b;
 
+	    if (shouldReverse(entity)) {
+	      coordinates.reverse();
+	    }
 
-	/**
-	 * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247
-	 */
+	    d3_geoStream({
+	      type: 'LineString',
+	      coordinates: coordinates
+	    }, projection.stream(clip({
+	      lineStart: function lineStart() {},
+	      lineEnd: function lineEnd() {
+	        a = null;
+	      },
+	      point: function point(x, y) {
+	        b = [x, y];
 
-	function Node() {
-	}
-	Node.prototype = {
-		firstChild : null,
-		lastChild : null,
-		previousSibling : null,
-		nextSibling : null,
-		attributes : null,
-		parentNode : null,
-		childNodes : null,
-		ownerDocument : null,
-		nodeValue : null,
-		namespaceURI : null,
-		prefix : null,
-		localName : null,
-		// Modified in DOM Level 2:
-		insertBefore:function(newChild, refChild){//raises 
-			return _insertBefore(this,newChild,refChild);
-		},
-		replaceChild:function(newChild, oldChild){//raises 
-			this.insertBefore(newChild,oldChild);
-			if(oldChild){
-				this.removeChild(oldChild);
-			}
-		},
-		removeChild:function(oldChild){
-			return _removeChild(this,oldChild);
-		},
-		appendChild:function(newChild){
-			return this.insertBefore(newChild,null);
-		},
-		hasChildNodes:function(){
-			return this.firstChild != null;
-		},
-		cloneNode:function(deep){
-			return cloneNode(this.ownerDocument||this,this,deep);
-		},
-		// Modified in DOM Level 2:
-		normalize:function(){
-			var child = this.firstChild;
-			while(child){
-				var next = child.nextSibling;
-				if(next && next.nodeType == TEXT_NODE && child.nodeType == TEXT_NODE){
-					this.removeChild(next);
-					child.appendData(next.data);
-				}else {
-					child.normalize();
-					child = next;
-				}
-			}
-		},
-	  	// Introduced in DOM Level 2:
-		isSupported:function(feature, version){
-			return this.ownerDocument.implementation.hasFeature(feature,version);
-		},
-	    // Introduced in DOM Level 2:
-	    hasAttributes:function(){
-	    	return this.attributes.length>0;
-	    },
-	    lookupPrefix:function(namespaceURI){
-	    	var el = this;
-	    	while(el){
-	    		var map = el._nsMap;
-	    		//console.dir(map)
-	    		if(map){
-	    			for(var n in map){
-	    				if(map[n] == namespaceURI){
-	    					return n;
-	    				}
-	    			}
-	    		}
-	    		el = el.nodeType == ATTRIBUTE_NODE?el.ownerDocument : el.parentNode;
-	    	}
-	    	return null;
-	    },
-	    // Introduced in DOM Level 3:
-	    lookupNamespaceURI:function(prefix){
-	    	var el = this;
-	    	while(el){
-	    		var map = el._nsMap;
-	    		//console.dir(map)
-	    		if(map){
-	    			if(prefix in map){
-	    				return map[prefix] ;
-	    			}
-	    		}
-	    		el = el.nodeType == ATTRIBUTE_NODE?el.ownerDocument : el.parentNode;
-	    	}
-	    	return null;
-	    },
-	    // Introduced in DOM Level 3:
-	    isDefaultNamespace:function(namespaceURI){
-	    	var prefix = this.lookupPrefix(namespaceURI);
-	    	return prefix == null;
-	    }
-	};
+	        if (a) {
+	          var span = geoVecLength(a, b) - offset;
 
+	          if (span >= 0) {
+	            var heading = geoVecAngle(a, b);
+	            var dx = dt * Math.cos(heading);
+	            var dy = dt * Math.sin(heading);
+	            var p = [a[0] + offset * Math.cos(heading), a[1] + offset * Math.sin(heading)]; // gather coordinates
 
-	function _xmlEncoder(c){
-		return c == '<' && '&lt;' ||
-	         c == '>' && '&gt;' ||
-	         c == '&' && '&amp;' ||
-	         c == '"' && '&quot;' ||
-	         '&#'+c.charCodeAt()+';'
-	}
+	            var coord = [a, p];
 
+	            for (span -= dt; span >= 0; span -= dt) {
+	              p = geoVecAdd(p, [dx, dy]);
+	              coord.push(p);
+	            }
 
-	copy$2(NodeType,Node);
-	copy$2(NodeType,Node.prototype);
+	            coord.push(b); // generate svg paths
 
-	/**
-	 * @param callback return true for continue,false for break
-	 * @return boolean true: break visit;
-	 */
-	function _visitNode(node,callback){
-		if(callback(node)){
-			return true;
-		}
-		if(node = node.firstChild){
-			do{
-				if(_visitNode(node,callback)){return true}
-	        }while(node=node.nextSibling)
-	    }
-	}
-
-
-
-	function Document(){
-	}
-	function _onAddAttribute(doc,el,newAttr){
-		doc && doc._inc++;
-		var ns = newAttr.namespaceURI ;
-		if(ns == 'http://www.w3.org/2000/xmlns/'){
-			//update namespace
-			el._nsMap[newAttr.prefix?newAttr.localName:''] = newAttr.value;
-		}
-	}
-	function _onRemoveAttribute(doc,el,newAttr,remove){
-		doc && doc._inc++;
-		var ns = newAttr.namespaceURI ;
-		if(ns == 'http://www.w3.org/2000/xmlns/'){
-			//update namespace
-			delete el._nsMap[newAttr.prefix?newAttr.localName:''];
-		}
-	}
-	function _onUpdateChild(doc,el,newChild){
-		if(doc && doc._inc){
-			doc._inc++;
-			//update childNodes
-			var cs = el.childNodes;
-			if(newChild){
-				cs[cs.length++] = newChild;
-			}else {
-				//console.log(1)
-				var child = el.firstChild;
-				var i = 0;
-				while(child){
-					cs[i++] = child;
-					child =child.nextSibling;
-				}
-				cs.length = i;
-			}
-		}
-	}
+	            var segment = '';
+	            var j;
 
-	/**
-	 * attributes;
-	 * children;
-	 * 
-	 * writeable properties:
-	 * nodeValue,Attr:value,CharacterData:data
-	 * prefix
-	 */
-	function _removeChild(parentNode,child){
-		var previous = child.previousSibling;
-		var next = child.nextSibling;
-		if(previous){
-			previous.nextSibling = next;
-		}else {
-			parentNode.firstChild = next;
-		}
-		if(next){
-			next.previousSibling = previous;
-		}else {
-			parentNode.lastChild = previous;
-		}
-		_onUpdateChild(parentNode.ownerDocument,parentNode);
-		return child;
-	}
-	/**
-	 * preformance key(refChild == null)
-	 */
-	function _insertBefore(parentNode,newChild,nextChild){
-		var cp = newChild.parentNode;
-		if(cp){
-			cp.removeChild(newChild);//remove and update
-		}
-		if(newChild.nodeType === DOCUMENT_FRAGMENT_NODE){
-			var newFirst = newChild.firstChild;
-			if (newFirst == null) {
-				return newChild;
-			}
-			var newLast = newChild.lastChild;
-		}else {
-			newFirst = newLast = newChild;
-		}
-		var pre = nextChild ? nextChild.previousSibling : parentNode.lastChild;
-
-		newFirst.previousSibling = pre;
-		newLast.nextSibling = nextChild;
-		
-		
-		if(pre){
-			pre.nextSibling = newFirst;
-		}else {
-			parentNode.firstChild = newFirst;
-		}
-		if(nextChild == null){
-			parentNode.lastChild = newLast;
-		}else {
-			nextChild.previousSibling = newLast;
-		}
-		do{
-			newFirst.parentNode = parentNode;
-		}while(newFirst !== newLast && (newFirst= newFirst.nextSibling))
-		_onUpdateChild(parentNode.ownerDocument||parentNode,parentNode);
-		//console.log(parentNode.lastChild.nextSibling == null)
-		if (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {
-			newChild.firstChild = newChild.lastChild = null;
-		}
-		return newChild;
-	}
-	function _appendSingleChild(parentNode,newChild){
-		var cp = newChild.parentNode;
-		if(cp){
-			var pre = parentNode.lastChild;
-			cp.removeChild(newChild);//remove and update
-			var pre = parentNode.lastChild;
-		}
-		var pre = parentNode.lastChild;
-		newChild.parentNode = parentNode;
-		newChild.previousSibling = pre;
-		newChild.nextSibling = null;
-		if(pre){
-			pre.nextSibling = newChild;
-		}else {
-			parentNode.firstChild = newChild;
-		}
-		parentNode.lastChild = newChild;
-		_onUpdateChild(parentNode.ownerDocument,parentNode,newChild);
-		return newChild;
-		//console.log("__aa",parentNode.lastChild.nextSibling == null)
-	}
-	Document.prototype = {
-		//implementation : null,
-		nodeName :  '#document',
-		nodeType :  DOCUMENT_NODE,
-		doctype :  null,
-		documentElement :  null,
-		_inc : 1,
-		
-		insertBefore :  function(newChild, refChild){//raises 
-			if(newChild.nodeType == DOCUMENT_FRAGMENT_NODE){
-				var child = newChild.firstChild;
-				while(child){
-					var next = child.nextSibling;
-					this.insertBefore(child,refChild);
-					child = next;
-				}
-				return newChild;
-			}
-			if(this.documentElement == null && newChild.nodeType == ELEMENT_NODE){
-				this.documentElement = newChild;
-			}
-			
-			return _insertBefore(this,newChild,refChild),(newChild.ownerDocument = this),newChild;
-		},
-		removeChild :  function(oldChild){
-			if(this.documentElement == oldChild){
-				this.documentElement = null;
-			}
-			return _removeChild(this,oldChild);
-		},
-		// Introduced in DOM Level 2:
-		importNode : function(importedNode,deep){
-			return importNode(this,importedNode,deep);
-		},
-		// Introduced in DOM Level 2:
-		getElementById :	function(id){
-			var rtv = null;
-			_visitNode(this.documentElement,function(node){
-				if(node.nodeType == ELEMENT_NODE){
-					if(node.getAttribute('id') == id){
-						rtv = node;
-						return true;
-					}
-				}
-			});
-			return rtv;
-		},
-		
-		//document factory method:
-		createElement :	function(tagName){
-			var node = new Element();
-			node.ownerDocument = this;
-			node.nodeName = tagName;
-			node.tagName = tagName;
-			node.childNodes = new NodeList();
-			var attrs	= node.attributes = new NamedNodeMap();
-			attrs._ownerElement = node;
-			return node;
-		},
-		createDocumentFragment :	function(){
-			var node = new DocumentFragment();
-			node.ownerDocument = this;
-			node.childNodes = new NodeList();
-			return node;
-		},
-		createTextNode :	function(data){
-			var node = new Text();
-			node.ownerDocument = this;
-			node.appendData(data);
-			return node;
-		},
-		createComment :	function(data){
-			var node = new Comment();
-			node.ownerDocument = this;
-			node.appendData(data);
-			return node;
-		},
-		createCDATASection :	function(data){
-			var node = new CDATASection();
-			node.ownerDocument = this;
-			node.appendData(data);
-			return node;
-		},
-		createProcessingInstruction :	function(target,data){
-			var node = new ProcessingInstruction();
-			node.ownerDocument = this;
-			node.tagName = node.target = target;
-			node.nodeValue= node.data = data;
-			return node;
-		},
-		createAttribute :	function(name){
-			var node = new Attr();
-			node.ownerDocument	= this;
-			node.name = name;
-			node.nodeName	= name;
-			node.localName = name;
-			node.specified = true;
-			return node;
-		},
-		createEntityReference :	function(name){
-			var node = new EntityReference();
-			node.ownerDocument	= this;
-			node.nodeName	= name;
-			return node;
-		},
-		// Introduced in DOM Level 2:
-		createElementNS :	function(namespaceURI,qualifiedName){
-			var node = new Element();
-			var pl = qualifiedName.split(':');
-			var attrs	= node.attributes = new NamedNodeMap();
-			node.childNodes = new NodeList();
-			node.ownerDocument = this;
-			node.nodeName = qualifiedName;
-			node.tagName = qualifiedName;
-			node.namespaceURI = namespaceURI;
-			if(pl.length == 2){
-				node.prefix = pl[0];
-				node.localName = pl[1];
-			}else {
-				//el.prefix = null;
-				node.localName = qualifiedName;
-			}
-			attrs._ownerElement = node;
-			return node;
-		},
-		// Introduced in DOM Level 2:
-		createAttributeNS :	function(namespaceURI,qualifiedName){
-			var node = new Attr();
-			var pl = qualifiedName.split(':');
-			node.ownerDocument = this;
-			node.nodeName = qualifiedName;
-			node.name = qualifiedName;
-			node.namespaceURI = namespaceURI;
-			node.specified = true;
-			if(pl.length == 2){
-				node.prefix = pl[0];
-				node.localName = pl[1];
-			}else {
-				//el.prefix = null;
-				node.localName = qualifiedName;
-			}
-			return node;
-		}
-	};
-	_extends(Document,Node);
-
-
-	function Element() {
-		this._nsMap = {};
-	}Element.prototype = {
-		nodeType : ELEMENT_NODE,
-		hasAttribute : function(name){
-			return this.getAttributeNode(name)!=null;
-		},
-		getAttribute : function(name){
-			var attr = this.getAttributeNode(name);
-			return attr && attr.value || '';
-		},
-		getAttributeNode : function(name){
-			return this.attributes.getNamedItem(name);
-		},
-		setAttribute : function(name, value){
-			var attr = this.ownerDocument.createAttribute(name);
-			attr.value = attr.nodeValue = "" + value;
-			this.setAttributeNode(attr);
-		},
-		removeAttribute : function(name){
-			var attr = this.getAttributeNode(name);
-			attr && this.removeAttributeNode(attr);
-		},
-		
-		//four real opeartion method
-		appendChild:function(newChild){
-			if(newChild.nodeType === DOCUMENT_FRAGMENT_NODE){
-				return this.insertBefore(newChild,null);
-			}else {
-				return _appendSingleChild(this,newChild);
-			}
-		},
-		setAttributeNode : function(newAttr){
-			return this.attributes.setNamedItem(newAttr);
-		},
-		setAttributeNodeNS : function(newAttr){
-			return this.attributes.setNamedItemNS(newAttr);
-		},
-		removeAttributeNode : function(oldAttr){
-			//console.log(this == oldAttr.ownerElement)
-			return this.attributes.removeNamedItem(oldAttr.nodeName);
-		},
-		//get real attribute name,and remove it by removeAttributeNode
-		removeAttributeNS : function(namespaceURI, localName){
-			var old = this.getAttributeNodeNS(namespaceURI, localName);
-			old && this.removeAttributeNode(old);
-		},
-		
-		hasAttributeNS : function(namespaceURI, localName){
-			return this.getAttributeNodeNS(namespaceURI, localName)!=null;
-		},
-		getAttributeNS : function(namespaceURI, localName){
-			var attr = this.getAttributeNodeNS(namespaceURI, localName);
-			return attr && attr.value || '';
-		},
-		setAttributeNS : function(namespaceURI, qualifiedName, value){
-			var attr = this.ownerDocument.createAttributeNS(namespaceURI, qualifiedName);
-			attr.value = attr.nodeValue = "" + value;
-			this.setAttributeNode(attr);
-		},
-		getAttributeNodeNS : function(namespaceURI, localName){
-			return this.attributes.getNamedItemNS(namespaceURI, localName);
-		},
-		
-		getElementsByTagName : function(tagName){
-			return new LiveNodeList(this,function(base){
-				var ls = [];
-				_visitNode(base,function(node){
-					if(node !== base && node.nodeType == ELEMENT_NODE && (tagName === '*' || node.tagName == tagName)){
-						ls.push(node);
-					}
-				});
-				return ls;
-			});
-		},
-		getElementsByTagNameNS : function(namespaceURI, localName){
-			return new LiveNodeList(this,function(base){
-				var ls = [];
-				_visitNode(base,function(node){
-					if(node !== base && node.nodeType === ELEMENT_NODE && (namespaceURI === '*' || node.namespaceURI === namespaceURI) && (localName === '*' || node.localName == localName)){
-						ls.push(node);
-					}
-				});
-				return ls;
-				
-			});
-		}
-	};
-	Document.prototype.getElementsByTagName = Element.prototype.getElementsByTagName;
-	Document.prototype.getElementsByTagNameNS = Element.prototype.getElementsByTagNameNS;
-
-
-	_extends(Element,Node);
-	function Attr() {
-	}Attr.prototype.nodeType = ATTRIBUTE_NODE;
-	_extends(Attr,Node);
-
-
-	function CharacterData() {
-	}CharacterData.prototype = {
-		data : '',
-		substringData : function(offset, count) {
-			return this.data.substring(offset, offset+count);
-		},
-		appendData: function(text) {
-			text = this.data+text;
-			this.nodeValue = this.data = text;
-			this.length = text.length;
-		},
-		insertData: function(offset,text) {
-			this.replaceData(offset,0,text);
-		
-		},
-		appendChild:function(newChild){
-			throw new Error(ExceptionMessage[HIERARCHY_REQUEST_ERR])
-		},
-		deleteData: function(offset, count) {
-			this.replaceData(offset,count,"");
-		},
-		replaceData: function(offset, count, text) {
-			var start = this.data.substring(0,offset);
-			var end = this.data.substring(offset+count);
-			text = start + text + end;
-			this.nodeValue = this.data = text;
-			this.length = text.length;
-		}
-	};
-	_extends(CharacterData,Node);
-	function Text() {
-	}Text.prototype = {
-		nodeName : "#text",
-		nodeType : TEXT_NODE,
-		splitText : function(offset) {
-			var text = this.data;
-			var newText = text.substring(offset);
-			text = text.substring(0, offset);
-			this.data = this.nodeValue = text;
-			this.length = text.length;
-			var newNode = this.ownerDocument.createTextNode(newText);
-			if(this.parentNode){
-				this.parentNode.insertBefore(newNode, this.nextSibling);
-			}
-			return newNode;
-		}
-	};
-	_extends(Text,CharacterData);
-	function Comment() {
-	}Comment.prototype = {
-		nodeName : "#comment",
-		nodeType : COMMENT_NODE
-	};
-	_extends(Comment,CharacterData);
+	            for (j = 0; j < coord.length; j++) {
+	              segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+	            }
 
-	function CDATASection() {
-	}CDATASection.prototype = {
-		nodeName : "#cdata-section",
-		nodeType : CDATA_SECTION_NODE
-	};
-	_extends(CDATASection,CharacterData);
+	            segments.push({
+	              id: entity.id,
+	              index: i++,
+	              d: segment
+	            });
 
+	            if (bothDirections(entity)) {
+	              segment = '';
 
-	function DocumentType() {
-	}DocumentType.prototype.nodeType = DOCUMENT_TYPE_NODE;
-	_extends(DocumentType,Node);
+	              for (j = coord.length - 1; j >= 0; j--) {
+	                segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+	              }
 
-	function Notation() {
-	}Notation.prototype.nodeType = NOTATION_NODE;
-	_extends(Notation,Node);
+	              segments.push({
+	                id: entity.id,
+	                index: i++,
+	                d: segment
+	              });
+	            }
+	          }
 
-	function Entity() {
-	}Entity.prototype.nodeType = ENTITY_NODE;
-	_extends(Entity,Node);
+	          offset = -span;
+	        }
 
-	function EntityReference() {
-	}EntityReference.prototype.nodeType = ENTITY_REFERENCE_NODE;
-	_extends(EntityReference,Node);
+	        a = b;
+	      }
+	    })));
+	    return segments;
+	  };
+	}
+	function svgPath(projection, graph, isArea) {
+	  // Explanation of magic numbers:
+	  // "padding" here allows space for strokes to extend beyond the viewport,
+	  // so that the stroke isn't drawn along the edge of the viewport when
+	  // the shape is clipped.
+	  //
+	  // When drawing lines, pad viewport by 5px.
+	  // When drawing areas, pad viewport by 65px in each direction to allow
+	  // for 60px area fill stroke (see ".fill-partial path.fill" css rule)
+	  var cache = {};
+	  var padding = isArea ? 65 : 5;
+	  var viewport = projection.clipExtent();
+	  var paddedExtent = [[viewport[0][0] - padding, viewport[0][1] - padding], [viewport[1][0] + padding, viewport[1][1] + padding]];
+	  var clip = d3_geoIdentity().clipExtent(paddedExtent).stream;
+	  var project = projection.stream;
+	  var path = d3_geoPath().projection({
+	    stream: function stream(output) {
+	      return project(clip(output));
+	    }
+	  });
 
-	function DocumentFragment() {
-	}DocumentFragment.prototype.nodeName =	"#document-fragment";
-	DocumentFragment.prototype.nodeType =	DOCUMENT_FRAGMENT_NODE;
-	_extends(DocumentFragment,Node);
+	  var svgpath = function svgpath(entity) {
+	    if (entity.id in cache) {
+	      return cache[entity.id];
+	    } else {
+	      return cache[entity.id] = path(entity.asGeoJSON(graph));
+	    }
+	  };
 
+	  svgpath.geojson = function (d) {
+	    if (d.__featurehash__ !== undefined) {
+	      if (d.__featurehash__ in cache) {
+	        return cache[d.__featurehash__];
+	      } else {
+	        return cache[d.__featurehash__] = path(d);
+	      }
+	    } else {
+	      return path(d);
+	    }
+	  };
 
-	function ProcessingInstruction() {
-	}
-	ProcessingInstruction.prototype.nodeType = PROCESSING_INSTRUCTION_NODE;
-	_extends(ProcessingInstruction,Node);
-	function XMLSerializer$1(){}
-	XMLSerializer$1.prototype.serializeToString = function(node,isHtml,nodeFilter){
-		return nodeSerializeToString.call(node,isHtml,nodeFilter);
-	};
-	Node.prototype.toString = nodeSerializeToString;
-	function nodeSerializeToString(isHtml,nodeFilter){
-		var buf = [];
-		var refNode = this.nodeType == 9?this.documentElement:this;
-		var prefix = refNode.prefix;
-		var uri = refNode.namespaceURI;
-		
-		if(uri && prefix == null){
-			//console.log(prefix)
-			var prefix = refNode.lookupPrefix(uri);
-			if(prefix == null){
-				//isHTML = true;
-				var visibleNamespaces=[
-				{namespace:uri,prefix:null} ];
-			}
-		}
-		serializeToString(this,buf,isHtml,nodeFilter,visibleNamespaces);
-		//console.log('###',this.nodeType,uri,prefix,buf.join(''))
-		return buf.join('');
-	}
-	function needNamespaceDefine(node,isHTML, visibleNamespaces) {
-		var prefix = node.prefix||'';
-		var uri = node.namespaceURI;
-		if (!prefix && !uri){
-			return false;
-		}
-		if (prefix === "xml" && uri === "http://www.w3.org/XML/1998/namespace" 
-			|| uri == 'http://www.w3.org/2000/xmlns/'){
-			return false;
-		}
-		
-		var i = visibleNamespaces.length; 
-		//console.log('@@@@',node.tagName,prefix,uri,visibleNamespaces)
-		while (i--) {
-			var ns = visibleNamespaces[i];
-			// get namespace prefix
-			//console.log(node.nodeType,node.tagName,ns.prefix,prefix)
-			if (ns.prefix == prefix){
-				return ns.namespace != uri;
-			}
-		}
-		//console.log(isHTML,uri,prefix=='')
-		//if(isHTML && prefix ==null && uri == 'http://www.w3.org/1999/xhtml'){
-		//	return false;
-		//}
-		//node.flag = '11111'
-		//console.error(3,true,node.flag,node.prefix,node.namespaceURI)
-		return true;
-	}
-	function serializeToString(node,buf,isHTML,nodeFilter,visibleNamespaces){
-		if(nodeFilter){
-			node = nodeFilter(node);
-			if(node){
-				if(typeof node == 'string'){
-					buf.push(node);
-					return;
-				}
-			}else {
-				return;
-			}
-			//buf.sort.apply(attrs, attributeSorter);
-		}
-		switch(node.nodeType){
-		case ELEMENT_NODE:
-			if (!visibleNamespaces) { visibleNamespaces = []; }
-			var startVisibleNamespaces = visibleNamespaces.length;
-			var attrs = node.attributes;
-			var len = attrs.length;
-			var child = node.firstChild;
-			var nodeName = node.tagName;
-			
-			isHTML =  (htmlns === node.namespaceURI) ||isHTML; 
-			buf.push('<',nodeName);
-			
-			
-			
-			for(var i=0;i<len;i++){
-				// add namespaces for attributes
-				var attr = attrs.item(i);
-				if (attr.prefix == 'xmlns') {
-					visibleNamespaces.push({ prefix: attr.localName, namespace: attr.value });
-				}else if(attr.nodeName == 'xmlns'){
-					visibleNamespaces.push({ prefix: '', namespace: attr.value });
-				}
-			}
-			for(var i=0;i<len;i++){
-				var attr = attrs.item(i);
-				if (needNamespaceDefine(attr,isHTML, visibleNamespaces)) {
-					var prefix = attr.prefix||'';
-					var uri = attr.namespaceURI;
-					var ns = prefix ? ' xmlns:' + prefix : " xmlns";
-					buf.push(ns, '="' , uri , '"');
-					visibleNamespaces.push({ prefix: prefix, namespace:uri });
-				}
-				serializeToString(attr,buf,isHTML,nodeFilter,visibleNamespaces);
-			}
-			// add namespace for current node		
-			if (needNamespaceDefine(node,isHTML, visibleNamespaces)) {
-				var prefix = node.prefix||'';
-				var uri = node.namespaceURI;
-				var ns = prefix ? ' xmlns:' + prefix : " xmlns";
-				buf.push(ns, '="' , uri , '"');
-				visibleNamespaces.push({ prefix: prefix, namespace:uri });
-			}
-			
-			if(child || isHTML && !/^(?:meta|link|img|br|hr|input)$/i.test(nodeName)){
-				buf.push('>');
-				//if is cdata child node
-				if(isHTML && /^script$/i.test(nodeName)){
-					while(child){
-						if(child.data){
-							buf.push(child.data);
-						}else {
-							serializeToString(child,buf,isHTML,nodeFilter,visibleNamespaces);
-						}
-						child = child.nextSibling;
-					}
-				}else
-				{
-					while(child){
-						serializeToString(child,buf,isHTML,nodeFilter,visibleNamespaces);
-						child = child.nextSibling;
-					}
-				}
-				buf.push('</',nodeName,'>');
-			}else {
-				buf.push('/>');
-			}
-			// remove added visible namespaces
-			//visibleNamespaces.length = startVisibleNamespaces;
-			return;
-		case DOCUMENT_NODE:
-		case DOCUMENT_FRAGMENT_NODE:
-			var child = node.firstChild;
-			while(child){
-				serializeToString(child,buf,isHTML,nodeFilter,visibleNamespaces);
-				child = child.nextSibling;
-			}
-			return;
-		case ATTRIBUTE_NODE:
-			return buf.push(' ',node.name,'="',node.value.replace(/[<&"]/g,_xmlEncoder),'"');
-		case TEXT_NODE:
-			return buf.push(node.data.replace(/[<&]/g,_xmlEncoder));
-		case CDATA_SECTION_NODE:
-			return buf.push( '<![CDATA[',node.data,']]>');
-		case COMMENT_NODE:
-			return buf.push( "<!--",node.data,"-->");
-		case DOCUMENT_TYPE_NODE:
-			var pubid = node.publicId;
-			var sysid = node.systemId;
-			buf.push('<!DOCTYPE ',node.name);
-			if(pubid){
-				buf.push(' PUBLIC "',pubid);
-				if (sysid && sysid!='.') {
-					buf.push( '" "',sysid);
-				}
-				buf.push('">');
-			}else if(sysid && sysid!='.'){
-				buf.push(' SYSTEM "',sysid,'">');
-			}else {
-				var sub = node.internalSubset;
-				if(sub){
-					buf.push(" [",sub,"]");
-				}
-				buf.push(">");
-			}
-			return;
-		case PROCESSING_INSTRUCTION_NODE:
-			return buf.push( "<?",node.target," ",node.data,"?>");
-		case ENTITY_REFERENCE_NODE:
-			return buf.push( '&',node.nodeName,';');
-		//case ENTITY_NODE:
-		//case NOTATION_NODE:
-		default:
-			buf.push('??',node.nodeName);
-		}
-	}
-	function importNode(doc,node,deep){
-		var node2;
-		switch (node.nodeType) {
-		case ELEMENT_NODE:
-			node2 = node.cloneNode(false);
-			node2.ownerDocument = doc;
-			//var attrs = node2.attributes;
-			//var len = attrs.length;
-			//for(var i=0;i<len;i++){
-				//node2.setAttributeNodeNS(importNode(doc,attrs.item(i),deep));
-			//}
-		case DOCUMENT_FRAGMENT_NODE:
-			break;
-		case ATTRIBUTE_NODE:
-			deep = true;
-			break;
-		//case ENTITY_REFERENCE_NODE:
-		//case PROCESSING_INSTRUCTION_NODE:
-		////case TEXT_NODE:
-		//case CDATA_SECTION_NODE:
-		//case COMMENT_NODE:
-		//	deep = false;
-		//	break;
-		//case DOCUMENT_NODE:
-		//case DOCUMENT_TYPE_NODE:
-		//cannot be imported.
-		//case ENTITY_NODE:
-		//case NOTATION_NODE：
-		//can not hit in level3
-		//default:throw e;
-		}
-		if(!node2){
-			node2 = node.cloneNode(false);//false
-		}
-		node2.ownerDocument = doc;
-		node2.parentNode = null;
-		if(deep){
-			var child = node.firstChild;
-			while(child){
-				node2.appendChild(importNode(doc,child,deep));
-				child = child.nextSibling;
-			}
-		}
-		return node2;
+	  return svgpath;
 	}
-	//
-	//var _relationMap = {firstChild:1,lastChild:1,previousSibling:1,nextSibling:1,
-	//					attributes:1,childNodes:1,parentNode:1,documentElement:1,doctype,};
-	function cloneNode(doc,node,deep){
-		var node2 = new node.constructor();
-		for(var n in node){
-			var v = node[n];
-			if(typeof v != 'object' ){
-				if(v != node2[n]){
-					node2[n] = v;
-				}
-			}
-		}
-		if(node.childNodes){
-			node2.childNodes = new NodeList();
-		}
-		node2.ownerDocument = doc;
-		switch (node2.nodeType) {
-		case ELEMENT_NODE:
-			var attrs	= node.attributes;
-			var attrs2	= node2.attributes = new NamedNodeMap();
-			var len = attrs.length;
-			attrs2._ownerElement = node2;
-			for(var i=0;i<len;i++){
-				node2.setAttributeNode(cloneNode(doc,attrs.item(i),true));
-			}
-			break;	case ATTRIBUTE_NODE:
-			deep = true;
-		}
-		if(deep){
-			var child = node.firstChild;
-			while(child){
-				node2.appendChild(cloneNode(doc,child,deep));
-				child = child.nextSibling;
-			}
-		}
-		return node2;
-	}
-
-	function __set__(object,key,value){
-		object[key] = value;
-	}
-	//do dynamic
-	try{
-		if(Object.defineProperty){
-			Object.defineProperty(LiveNodeList.prototype,'length',{
-				get:function(){
-					_updateLiveList(this);
-					return this.$$length;
-				}
-			});
-			Object.defineProperty(Node.prototype,'textContent',{
-				get:function(){
-					return getTextContent(this);
-				},
-				set:function(data){
-					switch(this.nodeType){
-					case ELEMENT_NODE:
-					case DOCUMENT_FRAGMENT_NODE:
-						while(this.firstChild){
-							this.removeChild(this.firstChild);
-						}
-						if(data || String(data)){
-							this.appendChild(this.ownerDocument.createTextNode(data));
-						}
-						break;
-					default:
-						//TODO:
-						this.data = data;
-						this.value = data;
-						this.nodeValue = data;
-					}
-				}
-			});
-			
-			function getTextContent(node){
-				switch(node.nodeType){
-				case ELEMENT_NODE:
-				case DOCUMENT_FRAGMENT_NODE:
-					var buf = [];
-					node = node.firstChild;
-					while(node){
-						if(node.nodeType!==7 && node.nodeType !==8){
-							buf.push(getTextContent(node));
-						}
-						node = node.nextSibling;
-					}
-					return buf.join('');
-				default:
-					return node.nodeValue;
-				}
-			}
-			__set__ = function(object,key,value){
-				//console.log(value)
-				object['$$'+key] = value;
-			};
-		}
-	}catch(e){//ie8
-	}
-
-	//if(typeof require == 'function'){
-		var DOMImplementation_1 = DOMImplementation;
-		var XMLSerializer_1 = XMLSerializer$1;
-	//}
-
-	var dom = {
-		DOMImplementation: DOMImplementation_1,
-		XMLSerializer: XMLSerializer_1
-	};
+	function svgPointTransform(projection) {
+	  var svgpoint = function svgpoint(entity) {
+	    // http://jsperf.com/short-array-join
+	    var pt = projection(entity.loc);
+	    return 'translate(' + pt[0] + ',' + pt[1] + ')';
+	  };
 
-	var domParser = createCommonjsModule(function (module, exports) {
-	function DOMParser(options){
-		this.options = options ||{locator:{}};
-		
-	}
-	DOMParser.prototype.parseFromString = function(source,mimeType){
-		var options = this.options;
-		var sax =  new XMLReader();
-		var domBuilder = options.domBuilder || new DOMHandler();//contentHandler and LexicalHandler
-		var errorHandler = options.errorHandler;
-		var locator = options.locator;
-		var defaultNSMap = options.xmlns||{};
-		var entityMap = {'lt':'<','gt':'>','amp':'&','quot':'"','apos':"'"};
-		if(locator){
-			domBuilder.setDocumentLocator(locator);
-		}
-		
-		sax.errorHandler = buildErrorHandler(errorHandler,domBuilder,locator);
-		sax.domBuilder = options.domBuilder || domBuilder;
-		if(/\/x?html?$/.test(mimeType)){
-			entityMap.nbsp = '\xa0';
-			entityMap.copy = '\xa9';
-			defaultNSMap['']= 'http://www.w3.org/1999/xhtml';
-		}
-		defaultNSMap.xml = defaultNSMap.xml || 'http://www.w3.org/XML/1998/namespace';
-		if(source){
-			sax.parse(source,defaultNSMap,entityMap);
-		}else {
-			sax.errorHandler.error("invalid doc source");
-		}
-		return domBuilder.doc;
-	};
-	function buildErrorHandler(errorImpl,domBuilder,locator){
-		if(!errorImpl){
-			if(domBuilder instanceof DOMHandler){
-				return domBuilder;
-			}
-			errorImpl = domBuilder ;
-		}
-		var errorHandler = {};
-		var isCallback = errorImpl instanceof Function;
-		locator = locator||{};
-		function build(key){
-			var fn = errorImpl[key];
-			if(!fn && isCallback){
-				fn = errorImpl.length == 2?function(msg){errorImpl(key,msg);}:errorImpl;
-			}
-			errorHandler[key] = fn && function(msg){
-				fn('[xmldom '+key+']\t'+msg+_locator(locator));
-			}||function(){};
-		}
-		build('warning');
-		build('error');
-		build('fatalError');
-		return errorHandler;
-	}
-
-	//console.log('#\n\n\n\n\n\n\n####')
-	/**
-	 * +ContentHandler+ErrorHandler
-	 * +LexicalHandler+EntityResolver2
-	 * -DeclHandler-DTDHandler 
-	 * 
-	 * DefaultHandler:EntityResolver, DTDHandler, ContentHandler, ErrorHandler
-	 * DefaultHandler2:DefaultHandler,LexicalHandler, DeclHandler, EntityResolver2
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/helpers/DefaultHandler.html
-	 */
-	function DOMHandler() {
-	    this.cdata = false;
-	}
-	function position(locator,node){
-		node.lineNumber = locator.lineNumber;
-		node.columnNumber = locator.columnNumber;
-	}
-	/**
-	 * @see org.xml.sax.ContentHandler#startDocument
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/ContentHandler.html
-	 */ 
-	DOMHandler.prototype = {
-		startDocument : function() {
-	    	this.doc = new DOMImplementation().createDocument(null, null, null);
-	    	if (this.locator) {
-	        	this.doc.documentURI = this.locator.systemId;
-	    	}
-		},
-		startElement:function(namespaceURI, localName, qName, attrs) {
-			var doc = this.doc;
-		    var el = doc.createElementNS(namespaceURI, qName||localName);
-		    var len = attrs.length;
-		    appendElement(this, el);
-		    this.currentElement = el;
-		    
-			this.locator && position(this.locator,el);
-		    for (var i = 0 ; i < len; i++) {
-		        var namespaceURI = attrs.getURI(i);
-		        var value = attrs.getValue(i);
-		        var qName = attrs.getQName(i);
-				var attr = doc.createAttributeNS(namespaceURI, qName);
-				this.locator &&position(attrs.getLocator(i),attr);
-				attr.value = attr.nodeValue = value;
-				el.setAttributeNode(attr);
-		    }
-		},
-		endElement:function(namespaceURI, localName, qName) {
-			var current = this.currentElement;
-			var tagName = current.tagName;
-			this.currentElement = current.parentNode;
-		},
-		startPrefixMapping:function(prefix, uri) {
-		},
-		endPrefixMapping:function(prefix) {
-		},
-		processingInstruction:function(target, data) {
-		    var ins = this.doc.createProcessingInstruction(target, data);
-		    this.locator && position(this.locator,ins);
-		    appendElement(this, ins);
-		},
-		ignorableWhitespace:function(ch, start, length) {
-		},
-		characters:function(chars, start, length) {
-			chars = _toString.apply(this,arguments);
-			//console.log(chars)
-			if(chars){
-				if (this.cdata) {
-					var charNode = this.doc.createCDATASection(chars);
-				} else {
-					var charNode = this.doc.createTextNode(chars);
-				}
-				if(this.currentElement){
-					this.currentElement.appendChild(charNode);
-				}else if(/^\s*$/.test(chars)){
-					this.doc.appendChild(charNode);
-					//process xml
-				}
-				this.locator && position(this.locator,charNode);
-			}
-		},
-		skippedEntity:function(name) {
-		},
-		endDocument:function() {
-			this.doc.normalize();
-		},
-		setDocumentLocator:function (locator) {
-		    if(this.locator = locator){// && !('lineNumber' in locator)){
-		    	locator.lineNumber = 0;
-		    }
-		},
-		//LexicalHandler
-		comment:function(chars, start, length) {
-			chars = _toString.apply(this,arguments);
-		    var comm = this.doc.createComment(chars);
-		    this.locator && position(this.locator,comm);
-		    appendElement(this, comm);
-		},
-		
-		startCDATA:function() {
-		    //used in characters() methods
-		    this.cdata = true;
-		},
-		endCDATA:function() {
-		    this.cdata = false;
-		},
-		
-		startDTD:function(name, publicId, systemId) {
-			var impl = this.doc.implementation;
-		    if (impl && impl.createDocumentType) {
-		        var dt = impl.createDocumentType(name, publicId, systemId);
-		        this.locator && position(this.locator,dt);
-		        appendElement(this, dt);
-		    }
-		},
-		/**
-		 * @see org.xml.sax.ErrorHandler
-		 * @link http://www.saxproject.org/apidoc/org/xml/sax/ErrorHandler.html
-		 */
-		warning:function(error) {
-			console.warn('[xmldom warning]\t'+error,_locator(this.locator));
-		},
-		error:function(error) {
-			console.error('[xmldom error]\t'+error,_locator(this.locator));
-		},
-		fatalError:function(error) {
-			console.error('[xmldom fatalError]\t'+error,_locator(this.locator));
-		    throw error;
-		}
-	};
-	function _locator(l){
-		if(l){
-			return '\n@'+(l.systemId ||'')+'#[line:'+l.lineNumber+',col:'+l.columnNumber+']'
-		}
-	}
-	function _toString(chars,start,length){
-		if(typeof chars == 'string'){
-			return chars.substr(start,length)
-		}else {//java sax connect width xmldom on rhino(what about: "? && !(chars instanceof String)")
-			if(chars.length >= start+length || start){
-				return new java.lang.String(chars,start,length)+'';
-			}
-			return chars;
-		}
+	  svgpoint.geojson = function (d) {
+	    return svgpoint(d.properties.entity);
+	  };
+
+	  return svgpoint;
 	}
+	function svgRelationMemberTags(graph) {
+	  return function (entity) {
+	    var tags = entity.tags;
+	    var shouldCopyMultipolygonTags = !entity.hasInterestingTags();
+	    graph.parentRelations(entity).forEach(function (relation) {
+	      var type = relation.tags.type;
 
-	/*
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/LexicalHandler.html
-	 * used method of org.xml.sax.ext.LexicalHandler:
-	 *  #comment(chars, start, length)
-	 *  #startCDATA()
-	 *  #endCDATA()
-	 *  #startDTD(name, publicId, systemId)
-	 *
-	 *
-	 * IGNORED method of org.xml.sax.ext.LexicalHandler:
-	 *  #endDTD()
-	 *  #startEntity(name)
-	 *  #endEntity(name)
-	 *
-	 *
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/DeclHandler.html
-	 * IGNORED method of org.xml.sax.ext.DeclHandler
-	 * 	#attributeDecl(eName, aName, type, mode, value)
-	 *  #elementDecl(name, model)
-	 *  #externalEntityDecl(name, publicId, systemId)
-	 *  #internalEntityDecl(name, value)
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/EntityResolver2.html
-	 * IGNORED method of org.xml.sax.EntityResolver2
-	 *  #resolveEntity(String name,String publicId,String baseURI,String systemId)
-	 *  #resolveEntity(publicId, systemId)
-	 *  #getExternalSubset(name, baseURI)
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/DTDHandler.html
-	 * IGNORED method of org.xml.sax.DTDHandler
-	 *  #notationDecl(name, publicId, systemId) {};
-	 *  #unparsedEntityDecl(name, publicId, systemId, notationName) {};
-	 */
-	"endDTD,startEntity,endEntity,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,resolveEntity,getExternalSubset,notationDecl,unparsedEntityDecl".replace(/\w+/g,function(key){
-		DOMHandler.prototype[key] = function(){return null};
-	});
+	      if (type === 'multipolygon' && shouldCopyMultipolygonTags || type === 'boundary') {
+	        tags = Object.assign({}, relation.tags, tags);
+	      }
+	    });
+	    return tags;
+	  };
+	}
+	function svgSegmentWay(way, graph, activeID) {
+	  // When there is no activeID, we can memoize this expensive computation
+	  if (activeID === undefined) {
+	    return graph["transient"](way, 'waySegments', getWaySegments);
+	  } else {
+	    return getWaySegments();
+	  }
 
-	/* Private static helpers treated below as private instance methods, so don't need to add these to the public API; we might use a Relator to also get rid of non-standard public properties */
-	function appendElement (hander,node) {
-	    if (!hander.currentElement) {
-	        hander.doc.appendChild(node);
-	    } else {
-	        hander.currentElement.appendChild(node);
-	    }
-	}//appendChild and setAttributeNS are preformance key
+	  function getWaySegments() {
+	    var isActiveWay = way.nodes.indexOf(activeID) !== -1;
+	    var features = {
+	      passive: [],
+	      active: []
+	    };
+	    var start = {};
+	    var end = {};
+	    var node, type;
 
-	//if(typeof require == 'function'){
-		var XMLReader = sax.XMLReader;
-		var DOMImplementation = exports.DOMImplementation = dom.DOMImplementation;
-		exports.XMLSerializer = dom.XMLSerializer ;
-		exports.DOMParser = DOMParser;
-	//}
-	});
+	    for (var i = 0; i < way.nodes.length; i++) {
+	      node = graph.entity(way.nodes[i]);
+	      type = svgPassiveVertex(node, graph, activeID);
+	      end = {
+	        node: node,
+	        type: type
+	      };
 
-	var togeojson = createCommonjsModule(function (module, exports) {
-	var toGeoJSON = (function() {
-
-	    var removeSpace = /\s*/g,
-	        trimSpace = /^\s*|\s*$/g,
-	        splitSpace = /\s+/;
-	    // generate a short, numeric hash of a string
-	    function okhash(x) {
-	        if (!x || !x.length) { return 0; }
-	        for (var i = 0, h = 0; i < x.length; i++) {
-	            h = ((h << 5) - h) + x.charCodeAt(i) | 0;
-	        } return h;
-	    }
-	    // all Y children of X
-	    function get(x, y) { return x.getElementsByTagName(y); }
-	    function attr(x, y) { return x.getAttribute(y); }
-	    function attrf(x, y) { return parseFloat(attr(x, y)); }
-	    // one Y child of X, if any, otherwise null
-	    function get1(x, y) { var n = get(x, y); return n.length ? n[0] : null; }
-	    // https://developer.mozilla.org/en-US/docs/Web/API/Node.normalize
-	    function norm(el) { if (el.normalize) { el.normalize(); } return el; }
-	    // cast array x into numbers
-	    function numarray(x) {
-	        for (var j = 0, o = []; j < x.length; j++) { o[j] = parseFloat(x[j]); }
-	        return o;
-	    }
-	    // get the content of a text node, if any
-	    function nodeVal(x) {
-	        if (x) { norm(x); }
-	        return (x && x.textContent) || '';
-	    }
-	    // get the contents of multiple text nodes, if present
-	    function getMulti(x, ys) {
-	        var o = {}, n, k;
-	        for (k = 0; k < ys.length; k++) {
-	            n = get1(x, ys[k]);
-	            if (n) { o[ys[k]] = nodeVal(n); }
-	        }
-	        return o;
-	    }
-	    // add properties of Y to X, overwriting if present in both
-	    function extend(x, y) { for (var k in y) { x[k] = y[k]; } }
-	    // get one coordinate from a coordinate array, if any
-	    function coord1(v) { return numarray(v.replace(removeSpace, '').split(',')); }
-	    // get all coordinates from a coordinate array as [[],[]]
-	    function coord(v) {
-	        var coords = v.replace(trimSpace, '').split(splitSpace),
-	            o = [];
-	        for (var i = 0; i < coords.length; i++) {
-	            o.push(coord1(coords[i]));
-	        }
-	        return o;
-	    }
-	    function coordPair(x) {
-	        var ll = [attrf(x, 'lon'), attrf(x, 'lat')],
-	            ele = get1(x, 'ele'),
-	            // handle namespaced attribute in browser
-	            heartRate = get1(x, 'gpxtpx:hr') || get1(x, 'hr'),
-	            time = get1(x, 'time'),
-	            e;
-	        if (ele) {
-	            e = parseFloat(nodeVal(ele));
-	            if (!isNaN(e)) {
-	                ll.push(e);
-	            }
+	      if (start.type !== undefined) {
+	        if (start.node.id === activeID || end.node.id === activeID) ; else if (isActiveWay && (start.type === 2 || end.type === 2)) {
+	          // one adjacent vertex
+	          pushActive(start, end, i);
+	        } else if (start.type === 0 && end.type === 0) {
+	          // both active vertices
+	          pushActive(start, end, i);
+	        } else {
+	          pushPassive(start, end, i);
 	        }
-	        return {
-	            coordinates: ll,
-	            time: time ? nodeVal(time) : null,
-	            heartRate: heartRate ? parseFloat(nodeVal(heartRate)) : null
-	        };
-	    }
+	      }
 
-	    // create a new feature collection parent object
-	    function fc() {
-	        return {
-	            type: 'FeatureCollection',
-	            features: []
-	        };
+	      start = end;
 	    }
 
-	    var serializer;
-	    if (typeof XMLSerializer !== 'undefined') {
-	        /* istanbul ignore next */
-	        serializer = new XMLSerializer();
-	    // only require xmldom in a node environment
-	    } else if ( typeof process === 'object' && !process.browser) {
-	        serializer = new (domParser.XMLSerializer)();
-	    }
-	    function xml2str(str) {
-	        // IE9 will create a new XMLSerializer but it'll crash immediately.
-	        // This line is ignored because we don't run coverage tests in IE9
-	        /* istanbul ignore next */
-	        if (str.xml !== undefined) { return str.xml; }
-	        return serializer.serializeToString(str);
-	    }
-
-	    var t = {
-	        kml: function(doc) {
-
-	            var gj = fc(),
-	                // styleindex keeps track of hashed styles in order to match features
-	                styleIndex = {}, styleByHash = {},
-	                // stylemapindex keeps track of style maps to expose in properties
-	                styleMapIndex = {},
-	                // atomic geospatial types supported by KML - MultiGeometry is
-	                // handled separately
-	                geotypes = ['Polygon', 'LineString', 'Point', 'Track', 'gx:Track'],
-	                // all root placemarks in the file
-	                placemarks = get(doc, 'Placemark'),
-	                styles = get(doc, 'Style'),
-	                styleMaps = get(doc, 'StyleMap');
-
-	            for (var k = 0; k < styles.length; k++) {
-	                var hash = okhash(xml2str(styles[k])).toString(16);
-	                styleIndex['#' + attr(styles[k], 'id')] = hash;
-	                styleByHash[hash] = styles[k];
-	            }
-	            for (var l = 0; l < styleMaps.length; l++) {
-	                styleIndex['#' + attr(styleMaps[l], 'id')] = okhash(xml2str(styleMaps[l])).toString(16);
-	                var pairs = get(styleMaps[l], 'Pair');
-	                var pairsMap = {};
-	                for (var m = 0; m < pairs.length; m++) {
-	                    pairsMap[nodeVal(get1(pairs[m], 'key'))] = nodeVal(get1(pairs[m], 'styleUrl'));
-	                }
-	                styleMapIndex['#' + attr(styleMaps[l], 'id')] = pairsMap;
-
-	            }
-	            for (var j = 0; j < placemarks.length; j++) {
-	                gj.features = gj.features.concat(getPlacemark(placemarks[j]));
-	            }
-	            function kmlColor(v) {
-	                var color, opacity;
-	                v = v || '';
-	                if (v.substr(0, 1) === '#') { v = v.substr(1); }
-	                if (v.length === 6 || v.length === 3) { color = v; }
-	                if (v.length === 8) {
-	                    opacity = parseInt(v.substr(0, 2), 16) / 255;
-	                    color = '#' + v.substr(6, 2) +
-	                        v.substr(4, 2) +
-	                        v.substr(2, 2);
-	                }
-	                return [color, isNaN(opacity) ? undefined : opacity];
-	            }
-	            function gxCoord(v) { return numarray(v.split(' ')); }
-	            function gxCoords(root) {
-	                var elems = get(root, 'coord'), coords = [], times = [];
-	                if (elems.length === 0) { elems = get(root, 'gx:coord'); }
-	                for (var i = 0; i < elems.length; i++) { coords.push(gxCoord(nodeVal(elems[i]))); }
-	                var timeElems = get(root, 'when');
-	                for (var j = 0; j < timeElems.length; j++) { times.push(nodeVal(timeElems[j])); }
-	                return {
-	                    coords: coords,
-	                    times: times
-	                };
-	            }
-	            function getGeometry(root) {
-	                var geomNode, geomNodes, i, j, k, geoms = [], coordTimes = [];
-	                if (get1(root, 'MultiGeometry')) { return getGeometry(get1(root, 'MultiGeometry')); }
-	                if (get1(root, 'MultiTrack')) { return getGeometry(get1(root, 'MultiTrack')); }
-	                if (get1(root, 'gx:MultiTrack')) { return getGeometry(get1(root, 'gx:MultiTrack')); }
-	                for (i = 0; i < geotypes.length; i++) {
-	                    geomNodes = get(root, geotypes[i]);
-	                    if (geomNodes) {
-	                        for (j = 0; j < geomNodes.length; j++) {
-	                            geomNode = geomNodes[j];
-	                            if (geotypes[i] === 'Point') {
-	                                geoms.push({
-	                                    type: 'Point',
-	                                    coordinates: coord1(nodeVal(get1(geomNode, 'coordinates')))
-	                                });
-	                            } else if (geotypes[i] === 'LineString') {
-	                                geoms.push({
-	                                    type: 'LineString',
-	                                    coordinates: coord(nodeVal(get1(geomNode, 'coordinates')))
-	                                });
-	                            } else if (geotypes[i] === 'Polygon') {
-	                                var rings = get(geomNode, 'LinearRing'),
-	                                    coords = [];
-	                                for (k = 0; k < rings.length; k++) {
-	                                    coords.push(coord(nodeVal(get1(rings[k], 'coordinates'))));
-	                                }
-	                                geoms.push({
-	                                    type: 'Polygon',
-	                                    coordinates: coords
-	                                });
-	                            } else if (geotypes[i] === 'Track' ||
-	                                geotypes[i] === 'gx:Track') {
-	                                var track = gxCoords(geomNode);
-	                                geoms.push({
-	                                    type: 'LineString',
-	                                    coordinates: track.coords
-	                                });
-	                                if (track.times.length) { coordTimes.push(track.times); }
-	                            }
-	                        }
-	                    }
-	                }
-	                return {
-	                    geoms: geoms,
-	                    coordTimes: coordTimes
-	                };
-	            }
-	            function getPlacemark(root) {
-	                var geomsAndTimes = getGeometry(root), i, properties = {},
-	                    name = nodeVal(get1(root, 'name')),
-	                    address = nodeVal(get1(root, 'address')),
-	                    styleUrl = nodeVal(get1(root, 'styleUrl')),
-	                    description = nodeVal(get1(root, 'description')),
-	                    timeSpan = get1(root, 'TimeSpan'),
-	                    timeStamp = get1(root, 'TimeStamp'),
-	                    extendedData = get1(root, 'ExtendedData'),
-	                    lineStyle = get1(root, 'LineStyle'),
-	                    polyStyle = get1(root, 'PolyStyle'),
-	                    visibility = get1(root, 'visibility');
-
-	                if (!geomsAndTimes.geoms.length) { return []; }
-	                if (name) { properties.name = name; }
-	                if (address) { properties.address = address; }
-	                if (styleUrl) {
-	                    if (styleUrl[0] !== '#') {
-	                        styleUrl = '#' + styleUrl;
-	                    }
+	    return features;
 
-	                    properties.styleUrl = styleUrl;
-	                    if (styleIndex[styleUrl]) {
-	                        properties.styleHash = styleIndex[styleUrl];
-	                    }
-	                    if (styleMapIndex[styleUrl]) {
-	                        properties.styleMapHash = styleMapIndex[styleUrl];
-	                        properties.styleHash = styleIndex[styleMapIndex[styleUrl].normal];
-	                    }
-	                    // Try to populate the lineStyle or polyStyle since we got the style hash
-	                    var style = styleByHash[properties.styleHash];
-	                    if (style) {
-	                        if (!lineStyle) { lineStyle = get1(style, 'LineStyle'); }
-	                        if (!polyStyle) { polyStyle = get1(style, 'PolyStyle'); }
-	                    }
-	                }
-	                if (description) { properties.description = description; }
-	                if (timeSpan) {
-	                    var begin = nodeVal(get1(timeSpan, 'begin'));
-	                    var end = nodeVal(get1(timeSpan, 'end'));
-	                    properties.timespan = { begin: begin, end: end };
-	                }
-	                if (timeStamp) {
-	                    properties.timestamp = nodeVal(get1(timeStamp, 'when'));
-	                }
-	                if (lineStyle) {
-	                    var linestyles = kmlColor(nodeVal(get1(lineStyle, 'color'))),
-	                        color = linestyles[0],
-	                        opacity = linestyles[1],
-	                        width = parseFloat(nodeVal(get1(lineStyle, 'width')));
-	                    if (color) { properties.stroke = color; }
-	                    if (!isNaN(opacity)) { properties['stroke-opacity'] = opacity; }
-	                    if (!isNaN(width)) { properties['stroke-width'] = width; }
-	                }
-	                if (polyStyle) {
-	                    var polystyles = kmlColor(nodeVal(get1(polyStyle, 'color'))),
-	                        pcolor = polystyles[0],
-	                        popacity = polystyles[1],
-	                        fill = nodeVal(get1(polyStyle, 'fill')),
-	                        outline = nodeVal(get1(polyStyle, 'outline'));
-	                    if (pcolor) { properties.fill = pcolor; }
-	                    if (!isNaN(popacity)) { properties['fill-opacity'] = popacity; }
-	                    if (fill) { properties['fill-opacity'] = fill === '1' ? properties['fill-opacity'] || 1 : 0; }
-	                    if (outline) { properties['stroke-opacity'] = outline === '1' ? properties['stroke-opacity'] || 1 : 0; }
-	                }
-	                if (extendedData) {
-	                    var datas = get(extendedData, 'Data'),
-	                        simpleDatas = get(extendedData, 'SimpleData');
+	    function pushActive(start, end, index) {
+	      features.active.push({
+	        type: 'Feature',
+	        id: way.id + '-' + index + '-nope',
+	        properties: {
+	          nope: true,
+	          target: true,
+	          entity: way,
+	          nodes: [start.node, end.node],
+	          index: index
+	        },
+	        geometry: {
+	          type: 'LineString',
+	          coordinates: [start.node.loc, end.node.loc]
+	        }
+	      });
+	    }
 
-	                    for (i = 0; i < datas.length; i++) {
-	                        properties[datas[i].getAttribute('name')] = nodeVal(get1(datas[i], 'value'));
-	                    }
-	                    for (i = 0; i < simpleDatas.length; i++) {
-	                        properties[simpleDatas[i].getAttribute('name')] = nodeVal(simpleDatas[i]);
-	                    }
-	                }
-	                if (visibility) {
-	                    properties.visibility = nodeVal(visibility);
-	                }
-	                if (geomsAndTimes.coordTimes.length) {
-	                    properties.coordTimes = (geomsAndTimes.coordTimes.length === 1) ?
-	                        geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes;
-	                }
-	                var feature = {
-	                    type: 'Feature',
-	                    geometry: (geomsAndTimes.geoms.length === 1) ? geomsAndTimes.geoms[0] : {
-	                        type: 'GeometryCollection',
-	                        geometries: geomsAndTimes.geoms
-	                    },
-	                    properties: properties
-	                };
-	                if (attr(root, 'id')) { feature.id = attr(root, 'id'); }
-	                return [feature];
-	            }
-	            return gj;
+	    function pushPassive(start, end, index) {
+	      features.passive.push({
+	        type: 'Feature',
+	        id: way.id + '-' + index,
+	        properties: {
+	          target: true,
+	          entity: way,
+	          nodes: [start.node, end.node],
+	          index: index
 	        },
-	        gpx: function(doc) {
-	            var i,
-	                tracks = get(doc, 'trk'),
-	                routes = get(doc, 'rte'),
-	                waypoints = get(doc, 'wpt'),
-	                // a feature collection
-	                gj = fc(),
-	                feature;
-	            for (i = 0; i < tracks.length; i++) {
-	                feature = getTrack(tracks[i]);
-	                if (feature) { gj.features.push(feature); }
-	            }
-	            for (i = 0; i < routes.length; i++) {
-	                feature = getRoute(routes[i]);
-	                if (feature) { gj.features.push(feature); }
-	            }
-	            for (i = 0; i < waypoints.length; i++) {
-	                gj.features.push(getPoint(waypoints[i]));
-	            }
-	            function getPoints(node, pointname) {
-	                var pts = get(node, pointname),
-	                    line = [],
-	                    times = [],
-	                    heartRates = [],
-	                    l = pts.length;
-	                if (l < 2) { return {}; }  // Invalid line in GeoJSON
-	                for (var i = 0; i < l; i++) {
-	                    var c = coordPair(pts[i]);
-	                    line.push(c.coordinates);
-	                    if (c.time) { times.push(c.time); }
-	                    if (c.heartRate) { heartRates.push(c.heartRate); }
-	                }
-	                return {
-	                    line: line,
-	                    times: times,
-	                    heartRates: heartRates
-	                };
-	            }
-	            function getTrack(node) {
-	                var segments = get(node, 'trkseg'),
-	                    track = [],
-	                    times = [],
-	                    heartRates = [],
-	                    line;
-	                for (var i = 0; i < segments.length; i++) {
-	                    line = getPoints(segments[i], 'trkpt');
-	                    if (line) {
-	                        if (line.line) { track.push(line.line); }
-	                        if (line.times && line.times.length) { times.push(line.times); }
-	                        if (line.heartRates && line.heartRates.length) { heartRates.push(line.heartRates); }
-	                    }
-	                }
-	                if (track.length === 0) { return; }
-	                var properties = getProperties(node);
-	                extend(properties, getLineStyle(get1(node, 'extensions')));
-	                if (times.length) { properties.coordTimes = track.length === 1 ? times[0] : times; }
-	                if (heartRates.length) { properties.heartRates = track.length === 1 ? heartRates[0] : heartRates; }
-	                return {
-	                    type: 'Feature',
-	                    properties: properties,
-	                    geometry: {
-	                        type: track.length === 1 ? 'LineString' : 'MultiLineString',
-	                        coordinates: track.length === 1 ? track[0] : track
-	                    }
-	                };
-	            }
-	            function getRoute(node) {
-	                var line = getPoints(node, 'rtept');
-	                if (!line.line) { return; }
-	                var prop = getProperties(node);
-	                extend(prop, getLineStyle(get1(node, 'extensions')));
-	                var routeObj = {
-	                    type: 'Feature',
-	                    properties: prop,
-	                    geometry: {
-	                        type: 'LineString',
-	                        coordinates: line.line
-	                    }
-	                };
-	                return routeObj;
-	            }
-	            function getPoint(node) {
-	                var prop = getProperties(node);
-	                extend(prop, getMulti(node, ['sym']));
-	                return {
-	                    type: 'Feature',
-	                    properties: prop,
-	                    geometry: {
-	                        type: 'Point',
-	                        coordinates: coordPair(node).coordinates
-	                    }
-	                };
-	            }
-	            function getLineStyle(extensions) {
-	                var style = {};
-	                if (extensions) {
-	                    var lineStyle = get1(extensions, 'line');
-	                    if (lineStyle) {
-	                        var color = nodeVal(get1(lineStyle, 'color')),
-	                            opacity = parseFloat(nodeVal(get1(lineStyle, 'opacity'))),
-	                            width = parseFloat(nodeVal(get1(lineStyle, 'width')));
-	                        if (color) { style.stroke = color; }
-	                        if (!isNaN(opacity)) { style['stroke-opacity'] = opacity; }
-	                        // GPX width is in mm, convert to px with 96 px per inch
-	                        if (!isNaN(width)) { style['stroke-width'] = width * 96 / 25.4; }
-	                    }
-	                }
-	                return style;
-	            }
-	            function getProperties(node) {
-	                var prop = getMulti(node, ['name', 'cmt', 'desc', 'type', 'time', 'keywords']),
-	                    links = get(node, 'link');
-	                if (links.length) { prop.links = []; }
-	                for (var i = 0, link; i < links.length; i++) {
-	                    link = { href: attr(links[i], 'href') };
-	                    extend(link, getMulti(links[i], ['text', 'type']));
-	                    prop.links.push(link);
-	                }
-	                return prop;
-	            }
-	            return gj;
+	        geometry: {
+	          type: 'LineString',
+	          coordinates: [start.node.loc, end.node.loc]
 	        }
-	    };
-	    return t;
-	})();
+	      });
+	    }
+	  }
+	}
 
-	{ module.exports = toGeoJSON; }
-	});
+	function svgTagClasses() {
+	  var primaries = ['building', 'highway', 'railway', 'waterway', 'aeroway', 'aerialway', 'piste:type', 'boundary', 'power', 'amenity', 'natural', 'landuse', 'leisure', 'military', 'place', 'man_made', 'route', 'attraction', 'building:part', 'indoor'];
+	  var statuses = [// nonexistent, might be built
+	  'proposed', 'planned', // under maintentance or between groundbreaking and opening
+	  'construction', // existent but not functional
+	  'disused', // dilapidated to nonexistent
+	  'abandoned', // nonexistent, still may appear in imagery
+	  'dismantled', 'razed', 'demolished', 'obliterated', // existent occasionally, e.g. stormwater drainage basin
+	  'intermittent'];
+	  var secondaries = ['oneway', 'bridge', 'tunnel', 'embankment', 'cutting', 'barrier', 'surface', 'tracktype', 'footway', 'crossing', 'service', 'sport', 'public_transport', 'location', 'parking', 'golf', 'type', 'leisure', 'man_made', 'indoor', 'construction', 'proposed'];
+
+	  var _tags = function _tags(entity) {
+	    return entity.tags;
+	  };
+
+	  var tagClasses = function tagClasses(selection) {
+	    selection.each(function tagClassesEach(entity) {
+	      var value = this.className;
+
+	      if (value.baseVal !== undefined) {
+	        value = value.baseVal;
+	      }
 
-	var _initialized = false;
-	var _enabled = false;
-	var _geojson;
+	      var t = _tags(entity);
 
+	      var computed = tagClasses.getClassesString(t, value);
 
-	function svgData(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var _showLabels = true;
-	    var detected = utilDetect();
-	    var layer = select(null);
-	    var _vtService;
-	    var _fileList;
-	    var _template;
-	    var _src;
+	      if (computed !== value) {
+	        select(this).attr('class', computed);
+	      }
+	    });
+	  };
 
+	  tagClasses.getClassesString = function (t, value) {
+	    var primary, status;
+	    var i, j, k, v; // in some situations we want to render perimeter strokes a certain way
 
-	    function init() {
-	        if (_initialized) { return; }  // run once
+	    var overrideGeometry;
 
-	        _geojson = {};
-	        _enabled = true;
+	    if (/\bstroke\b/.test(value)) {
+	      if (!!t.barrier && t.barrier !== 'no') {
+	        overrideGeometry = 'line';
+	      }
+	    } // preserve base classes (nothing with `tag-`)
+
+
+	    var classes = value.trim().split(/\s+/).filter(function (klass) {
+	      return klass.length && !/^tag-/.test(klass);
+	    }).map(function (klass) {
+	      // special overrides for some perimeter strokes
+	      return klass === 'line' || klass === 'area' ? overrideGeometry || klass : klass;
+	    }); // pick at most one primary classification tag..
+
+	    for (i = 0; i < primaries.length; i++) {
+	      k = primaries[i];
+	      v = t[k];
+	      if (!v || v === 'no') continue;
+
+	      if (k === 'piste:type') {
+	        // avoid a ':' in the class name
+	        k = 'piste';
+	      } else if (k === 'building:part') {
+	        // avoid a ':' in the class name
+	        k = 'building_part';
+	      }
 
-	        function over() {
-	            event.stopPropagation();
-	            event.preventDefault();
-	            event.dataTransfer.dropEffect = 'copy';
-	        }
+	      primary = k;
 
-	        context.container()
-	            .attr('dropzone', 'copy')
-	            .on('drop.svgData', function() {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                if (!detected.filedrop) { return; }
-	                drawData.fileList(event.dataTransfer.files);
-	            })
-	            .on('dragenter.svgData', over)
-	            .on('dragexit.svgData', over)
-	            .on('dragover.svgData', over);
+	      if (statuses.indexOf(v) !== -1) {
+	        // e.g. `railway=abandoned`
+	        status = v;
+	        classes.push('tag-' + k);
+	      } else {
+	        classes.push('tag-' + k);
+	        classes.push('tag-' + k + '-' + v);
+	      }
 
-	        _initialized = true;
+	      break;
 	    }
 
+	    if (!primary) {
+	      for (i = 0; i < statuses.length; i++) {
+	        for (j = 0; j < primaries.length; j++) {
+	          k = statuses[i] + ':' + primaries[j]; // e.g. `demolished:building=yes`
 
-	    function getService() {
-	        if (services.vectorTile && !_vtService) {
-	            _vtService = services.vectorTile;
-	            _vtService.event.on('loadedData', throttledRedraw);
-	        } else if (!services.vectorTile && _vtService) {
-	            _vtService = null;
+	          v = t[k];
+	          if (!v || v === 'no') continue;
+	          status = statuses[i];
+	          break;
 	        }
-
-	        return _vtService;
+	      }
+	    } // add at most one status tag, only if relates to primary tag..
+
+
+	    if (!status) {
+	      for (i = 0; i < statuses.length; i++) {
+	        k = statuses[i];
+	        v = t[k];
+	        if (!v || v === 'no') continue;
+
+	        if (v === 'yes') {
+	          // e.g. `railway=rail + abandoned=yes`
+	          status = k;
+	        } else if (primary && primary === v) {
+	          // e.g. `railway=rail + abandoned=railway`
+	          status = k;
+	        } else if (!primary && primaries.indexOf(v) !== -1) {
+	          // e.g. `abandoned=railway`
+	          status = k;
+	          primary = v;
+	          classes.push('tag-' + v);
+	        } // else ignore e.g.  `highway=path + abandoned=railway`
+
+
+	        if (status) break;
+	      }
 	    }
 
+	    if (status) {
+	      classes.push('tag-status');
+	      classes.push('tag-status-' + status);
+	    } // add any secondary tags
 
-	    function showLayer() {
-	        layerOn();
-
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
-	    }
 
+	    for (i = 0; i < secondaries.length; i++) {
+	      k = secondaries[i];
+	      v = t[k];
+	      if (!v || v === 'no' || k === primary) continue;
+	      classes.push('tag-' + k);
+	      classes.push('tag-' + k + '-' + v);
+	    } // For highways, look for surface tagging..
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', layerOff);
-	    }
+	    if (primary === 'highway' && !osmPathHighwayTagValues[t.highway] || primary === 'aeroway') {
+	      var surface = t.highway === 'track' ? 'unpaved' : 'paved';
 
+	      for (k in t) {
+	        v = t[k];
 
-	    function layerOn() {
-	        layer.style('display', 'block');
-	    }
+	        if (k in osmPavedTags) {
+	          surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
+	        }
 
+	        if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
+	          surface = 'semipaved';
+	        }
+	      }
 
-	    function layerOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
-	    }
+	      classes.push('tag-' + surface);
+	    } // If this is a wikidata-tagged item, add a class for that..
 
 
-	    // ensure that all geojson features in a collection have IDs
-	    function ensureIDs(gj) {
-	        if (!gj) { return null; }
+	    var qid = t.wikidata || t['flag:wikidata'] || t['brand:wikidata'] || t['network:wikidata'] || t['operator:wikidata'];
 
-	        if (gj.type === 'FeatureCollection') {
-	            for (var i = 0; i < gj.features.length; i++) {
-	                ensureFeatureID(gj.features[i]);
-	            }
-	        } else {
-	            ensureFeatureID(gj);
-	        }
-	        return gj;
+	    if (qid) {
+	      classes.push('tag-wikidata');
 	    }
 
+	    return classes.join(' ').trim();
+	  };
 
-	    // ensure that each single Feature object has a unique ID
-	    function ensureFeatureID(feature) {
-	        if (!feature) { return; }
-	        feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
-	        return feature;
-	    }
+	  tagClasses.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val;
+	    return tagClasses;
+	  };
 
+	  return tagClasses;
+	}
 
-	    // Prefer an array of Features instead of a FeatureCollection
-	    function getFeatures(gj) {
-	        if (!gj) { return []; }
+	// Patterns only work in Firefox when set directly on element.
+	// (This is not a bug: https://bugzilla.mozilla.org/show_bug.cgi?id=750632)
+	var patterns = {
+	  // tag - pattern name
+	  // -or-
+	  // tag - value - pattern name
+	  // -or-
+	  // tag - value - rules (optional tag-values, pattern name)
+	  // (matches earlier rules first, so fallback should be last entry)
+	  amenity: {
+	    grave_yard: 'cemetery',
+	    fountain: 'water_standing'
+	  },
+	  landuse: {
+	    cemetery: [{
+	      religion: 'christian',
+	      pattern: 'cemetery_christian'
+	    }, {
+	      religion: 'buddhist',
+	      pattern: 'cemetery_buddhist'
+	    }, {
+	      religion: 'muslim',
+	      pattern: 'cemetery_muslim'
+	    }, {
+	      religion: 'jewish',
+	      pattern: 'cemetery_jewish'
+	    }, {
+	      pattern: 'cemetery'
+	    }],
+	    construction: 'construction',
+	    farmland: 'farmland',
+	    farmyard: 'farmyard',
+	    forest: [{
+	      leaf_type: 'broadleaved',
+	      pattern: 'forest_broadleaved'
+	    }, {
+	      leaf_type: 'needleleaved',
+	      pattern: 'forest_needleleaved'
+	    }, {
+	      leaf_type: 'leafless',
+	      pattern: 'forest_leafless'
+	    }, {
+	      pattern: 'forest'
+	    } // same as 'leaf_type:mixed'
+	    ],
+	    grave_yard: 'cemetery',
+	    grass: [{
+	      golf: 'green',
+	      pattern: 'golf_green'
+	    }, {
+	      pattern: 'grass'
+	    }],
+	    landfill: 'landfill',
+	    meadow: 'meadow',
+	    military: 'construction',
+	    orchard: 'orchard',
+	    quarry: 'quarry',
+	    vineyard: 'vineyard'
+	  },
+	  natural: {
+	    beach: 'beach',
+	    grassland: 'grass',
+	    sand: 'beach',
+	    scrub: 'scrub',
+	    water: [{
+	      water: 'pond',
+	      pattern: 'pond'
+	    }, {
+	      water: 'reservoir',
+	      pattern: 'water_standing'
+	    }, {
+	      pattern: 'waves'
+	    }],
+	    wetland: [{
+	      wetland: 'marsh',
+	      pattern: 'wetland_marsh'
+	    }, {
+	      wetland: 'swamp',
+	      pattern: 'wetland_swamp'
+	    }, {
+	      wetland: 'bog',
+	      pattern: 'wetland_bog'
+	    }, {
+	      wetland: 'reedbed',
+	      pattern: 'wetland_reedbed'
+	    }, {
+	      pattern: 'wetland'
+	    }],
+	    wood: [{
+	      leaf_type: 'broadleaved',
+	      pattern: 'forest_broadleaved'
+	    }, {
+	      leaf_type: 'needleleaved',
+	      pattern: 'forest_needleleaved'
+	    }, {
+	      leaf_type: 'leafless',
+	      pattern: 'forest_leafless'
+	    }, {
+	      pattern: 'forest'
+	    } // same as 'leaf_type:mixed'
+	    ]
+	  },
+	  traffic_calming: {
+	    island: [{
+	      surface: 'grass',
+	      pattern: 'grass'
+	    }],
+	    chicane: [{
+	      surface: 'grass',
+	      pattern: 'grass'
+	    }],
+	    choker: [{
+	      surface: 'grass',
+	      pattern: 'grass'
+	    }]
+	  }
+	};
+	function svgTagPattern(tags) {
+	  // Skip pattern filling if this is a building (buildings don't get patterns applied)
+	  if (tags.building && tags.building !== 'no') {
+	    return null;
+	  }
 
-	        if (gj.type === 'FeatureCollection') {
-	            return gj.features;
-	        } else {
-	            return [gj];
-	        }
-	    }
+	  for (var tag in patterns) {
+	    var entityValue = tags[tag];
+	    if (!entityValue) continue;
 
+	    if (typeof patterns[tag] === 'string') {
+	      // extra short syntax (just tag) - pattern name
+	      return 'pattern-' + patterns[tag];
+	    } else {
+	      var values = patterns[tag];
 
-	    function featureKey(d) {
-	        return d.__featurehash__;
-	    }
+	      for (var value in values) {
+	        if (entityValue !== value) continue;
+	        var rules = values[value];
 
+	        if (typeof rules === 'string') {
+	          // short syntax - pattern name
+	          return 'pattern-' + rules;
+	        } // long syntax - rule array
 
-	    function isPolygon(d) {
-	        return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
-	    }
 
+	        for (var ruleKey in rules) {
+	          var rule = rules[ruleKey];
+	          var pass = true;
 
-	    function clipPathID(d) {
-	        return 'ideditor-data-' + d.__featurehash__ + '-clippath';
-	    }
+	          for (var criterion in rule) {
+	            if (criterion !== 'pattern') {
+	              // reserved for pattern name
+	              // The only rule is a required tag-value pair
+	              var v = tags[criterion];
 
+	              if (!v || v !== rule[criterion]) {
+	                pass = false;
+	                break;
+	              }
+	            }
+	          }
 
-	    function featureClasses(d) {
-	        return [
-	            'data' + d.__featurehash__,
-	            d.geometry.type,
-	            isPolygon(d) ? 'area' : '',
-	            d.__layerID__ || ''
-	        ].filter(Boolean).join(' ');
+	          if (pass) {
+	            return 'pattern-' + rule.pattern;
+	          }
+	        }
+	      }
 	    }
+	  }
 
+	  return null;
+	}
 
-	    function drawData(selection) {
-	        var vtService = getService();
-	        var getPath = svgPath(projection).geojson;
-	        var getAreaPath = svgPath(projection, null, true).geojson;
-	        var hasData = drawData.hasData();
+	function svgAreas(projection, context) {
+	  function getPatternStyle(tags) {
+	    var imageID = svgTagPattern(tags);
 
-	        layer = selection.selectAll('.layer-mapdata')
-	            .data(_enabled && hasData ? [0] : []);
+	    if (imageID) {
+	      return 'url("#ideditor-' + imageID + '")';
+	    }
 
-	        layer.exit()
-	            .remove();
+	    return '';
+	  }
 
-	        layer = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapdata')
-	            .merge(layer);
+	  function drawTargets(selection, graph, entities, filter) {
+	    var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
+	    var getPath = svgPath(projection).geojson;
+	    var activeID = context.activeID();
+	    var base = context.history().base(); // The targets and nopes will be MultiLineString sub-segments of the ways
 
-	        var surface = context.surface();
-	        if (!surface || surface.empty()) { return; }  // not ready to draw yet, starting up
+	    var data = {
+	      targets: [],
+	      nopes: []
+	    };
+	    entities.forEach(function (way) {
+	      var features = svgSegmentWay(way, graph, activeID);
+	      data.targets.push.apply(data.targets, features.passive);
+	      data.nopes.push.apply(data.nopes, features.active);
+	    }); // Targets allow hover and vertex snapping
 
+	    var targetData = data.targets.filter(getPath);
+	    var targets = selection.selectAll('.area.target-allowed').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(targetData, function key(d) {
+	      return d.id;
+	    }); // exit
 
-	        // Gather data
-	        var geoData, polygonData;
-	        if (_template && vtService) {   // fetch data from vector tile service
-	            var sourceID = _template;
-	            vtService.loadTiles(sourceID, _template, projection);
-	            geoData = vtService.data(sourceID, projection);
-	        } else {
-	            geoData = getFeatures(_geojson);
-	        }
-	        geoData = geoData.filter(getPath);
-	        polygonData = geoData.filter(isPolygon);
+	    targets.exit().remove();
 
+	    var segmentWasEdited = function segmentWasEdited(d) {
+	      var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
 
-	        // Draw clip paths for polygons
-	        var clipPaths = surface.selectAll('defs').selectAll('.clipPath-data')
-	           .data(polygonData, featureKey);
+	      if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+	        return false;
+	      }
 
-	        clipPaths.exit()
-	           .remove();
+	      return d.properties.nodes.some(function (n) {
+	        return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
+	      });
+	    }; // enter/update
 
-	        var clipPathsEnter = clipPaths.enter()
-	           .append('clipPath')
-	           .attr('class', 'clipPath-data')
-	           .attr('id', clipPathID);
 
-	        clipPathsEnter
-	           .append('path');
+	    targets.enter().append('path').merge(targets).attr('d', getPath).attr('class', function (d) {
+	      return 'way area target target-allowed ' + targetClass + d.id;
+	    }).classed('segment-edited', segmentWasEdited); // NOPE
 
-	        clipPaths.merge(clipPathsEnter)
-	           .selectAll('path')
-	           .attr('d', getAreaPath);
+	    var nopeData = data.nopes.filter(getPath);
+	    var nopes = selection.selectAll('.area.target-nope').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(nopeData, function key(d) {
+	      return d.id;
+	    }); // exit
 
+	    nopes.exit().remove(); // enter/update
 
-	        // Draw fill, shadow, stroke layers
-	        var datagroups = layer
-	            .selectAll('g.datagroup')
-	            .data(['fill', 'shadow', 'stroke']);
+	    nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
+	      return 'way area target target-nope ' + nopeClass + d.id;
+	    }).classed('segment-edited', segmentWasEdited);
+	  }
 
-	        datagroups = datagroups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'datagroup datagroup-' + d; })
-	            .merge(datagroups);
+	  function drawAreas(selection, graph, entities, filter) {
+	    var path = svgPath(projection, graph, true);
+	    var areas = {};
+	    var multipolygon;
+	    var base = context.history().base();
 
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (entity.geometry(graph) !== 'area') continue;
+	      multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
 
-	        // Draw paths
-	        var pathData = {
-	            fill: polygonData,
-	            shadow: geoData,
-	            stroke: geoData
+	      if (multipolygon) {
+	        areas[multipolygon.id] = {
+	          entity: multipolygon.mergeTags(entity.tags),
+	          area: Math.abs(entity.area(graph))
+	        };
+	      } else if (!areas[entity.id]) {
+	        areas[entity.id] = {
+	          entity: entity,
+	          area: Math.abs(entity.area(graph))
 	        };
+	      }
+	    }
 
-	        var paths = datagroups
-	            .selectAll('path')
-	            .data(function(layer) { return pathData[layer]; }, featureKey);
-
-	        // exit
-	        paths.exit()
-	            .remove();
-
-	        // enter/update
-	        paths = paths.enter()
-	            .append('path')
-	            .attr('class', function(d) {
-	                var datagroup = this.parentNode.__data__;
-	                return 'pathdata ' + datagroup + ' ' + featureClasses(d);
-	            })
-	            .attr('clip-path', function(d) {
-	                var datagroup = this.parentNode.__data__;
-	                return datagroup === 'fill' ? ('url(#' + clipPathID(d) + ')') : null;
-	            })
-	            .merge(paths)
-	            .attr('d', function(d) {
-	                var datagroup = this.parentNode.__data__;
-	                return datagroup === 'fill' ? getAreaPath(d) : getPath(d);
-	            });
+	    var fills = Object.values(areas).filter(function hasPath(a) {
+	      return path(a.entity);
+	    });
+	    fills.sort(function areaSort(a, b) {
+	      return b.area - a.area;
+	    });
+	    fills = fills.map(function (a) {
+	      return a.entity;
+	    });
+	    var strokes = fills.filter(function (area) {
+	      return area.type === 'way';
+	    });
+	    var data = {
+	      clip: fills,
+	      shadow: strokes,
+	      stroke: strokes,
+	      fill: fills
+	    };
+	    var clipPaths = context.surface().selectAll('defs').selectAll('.clipPath-osm').filter(filter).data(data.clip, osmEntity.key);
+	    clipPaths.exit().remove();
+	    var clipPathsEnter = clipPaths.enter().append('clipPath').attr('class', 'clipPath-osm').attr('id', function (entity) {
+	      return 'ideditor-' + entity.id + '-clippath';
+	    });
+	    clipPathsEnter.append('path');
+	    clipPaths.merge(clipPathsEnter).selectAll('path').attr('d', path);
+	    var drawLayer = selection.selectAll('.layer-osm.areas');
+	    var touchLayer = selection.selectAll('.layer-touch.areas'); // Draw areas..
+
+	    var areagroup = drawLayer.selectAll('g.areagroup').data(['fill', 'shadow', 'stroke']);
+	    areagroup = areagroup.enter().append('g').attr('class', function (d) {
+	      return 'areagroup area-' + d;
+	    }).merge(areagroup);
+	    var paths = areagroup.selectAll('path').filter(filter).data(function (layer) {
+	      return data[layer];
+	    }, osmEntity.key);
+	    paths.exit().remove();
+	    var fillpaths = selection.selectAll('.area-fill path.area').nodes();
+	    var bisect = d3_bisector(function (node) {
+	      return -node.__data__.area(graph);
+	    }).left;
+
+	    function sortedByArea(entity) {
+	      if (this._parent.__data__ === 'fill') {
+	        return fillpaths[bisect(fillpaths, -entity.area(graph))];
+	      }
+	    }
 
+	    paths = paths.enter().insert('path', sortedByArea).merge(paths).each(function (entity) {
+	      var layer = this.parentNode.__data__;
+	      this.setAttribute('class', entity.type + ' area ' + layer + ' ' + entity.id);
 
-	        // Draw labels
-	        layer
-	            .call(drawLabels, 'label-halo', geoData)
-	            .call(drawLabels, 'label', geoData);
+	      if (layer === 'fill') {
+	        this.setAttribute('clip-path', 'url(#ideditor-' + entity.id + '-clippath)');
+	        this.style.fill = this.style.stroke = getPatternStyle(entity.tags);
+	      }
+	    }).classed('added', function (d) {
+	      return !base.entities[d.id];
+	    }).classed('geometry-edited', function (d) {
+	      return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
+	    }).classed('retagged', function (d) {
+	      return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+	    }).call(svgTagClasses()).attr('d', path); // Draw touch targets..
 
+	    touchLayer.call(drawTargets, graph, data.stroke, filter);
+	  }
 
-	        function drawLabels(selection, textClass, data) {
-	            var labelPath = d3_geoPath(projection);
-	            var labelData = data.filter(function(d) {
-	                return _showLabels && d.properties && (d.properties.desc || d.properties.name);
-	            });
+	  return drawAreas;
+	}
 
-	            var labels = selection.selectAll('text.' + textClass)
-	                .data(labelData, featureKey);
+	var fastJsonStableStringify = function fastJsonStableStringify(data, opts) {
+	  if (!opts) opts = {};
+	  if (typeof opts === 'function') opts = {
+	    cmp: opts
+	  };
+	  var cycles = typeof opts.cycles === 'boolean' ? opts.cycles : false;
 
-	            // exit
-	            labels.exit()
-	                .remove();
+	  var cmp = opts.cmp && function (f) {
+	    return function (node) {
+	      return function (a, b) {
+	        var aobj = {
+	          key: a,
+	          value: node[a]
+	        };
+	        var bobj = {
+	          key: b,
+	          value: node[b]
+	        };
+	        return f(aobj, bobj);
+	      };
+	    };
+	  }(opts.cmp);
 
-	            // enter/update
-	            labels = labels.enter()
-	                .append('text')
-	                .attr('class', function(d) { return textClass + ' ' + featureClasses(d); })
-	                .merge(labels)
-	                .text(function(d) {
-	                    return d.properties.desc || d.properties.name;
-	                })
-	                .attr('x', function(d) {
-	                    var centroid = labelPath.centroid(d);
-	                    return centroid[0] + 11;
-	                })
-	                .attr('y', function(d) {
-	                    var centroid = labelPath.centroid(d);
-	                    return centroid[1];
-	                });
-	        }
+	  var seen = [];
+	  return function stringify(node) {
+	    if (node && node.toJSON && typeof node.toJSON === 'function') {
+	      node = node.toJSON();
 	    }
 
+	    if (node === undefined) return;
+	    if (typeof node == 'number') return isFinite(node) ? '' + node : 'null';
+	    if (_typeof(node) !== 'object') return JSON.stringify(node);
+	    var i, out;
+
+	    if (Array.isArray(node)) {
+	      out = '[';
 
-	    function getExtension(fileName) {
-	        if (!fileName) { return; }
+	      for (i = 0; i < node.length; i++) {
+	        if (i) out += ',';
+	        out += stringify(node[i]) || 'null';
+	      }
 
-	        var re = /\.(gpx|kml|(geo)?json)$/i;
-	        var match = fileName.toLowerCase().match(re);
-	        return match && match.length && match[0];
+	      return out + ']';
 	    }
 
+	    if (node === null) return 'null';
 
-	    function xmlToDom(textdata) {
-	        return (new DOMParser()).parseFromString(textdata, 'text/xml');
+	    if (seen.indexOf(node) !== -1) {
+	      if (cycles) return JSON.stringify('__cycle__');
+	      throw new TypeError('Converting circular structure to JSON');
 	    }
 
+	    var seenIndex = seen.push(node) - 1;
+	    var keys = Object.keys(node).sort(cmp && cmp(node));
+	    out = '';
 
-	    drawData.setFile = function(extension, data) {
-	        _template = null;
-	        _fileList = null;
-	        _geojson = null;
-	        _src = null;
-
-	        var gj;
-	        switch (extension) {
-	            case '.gpx':
-	                gj = togeojson.gpx(xmlToDom(data));
-	                break;
-	            case '.kml':
-	                gj = togeojson.kml(xmlToDom(data));
-	                break;
-	            case '.geojson':
-	            case '.json':
-	                gj = JSON.parse(data);
-	                break;
-	        }
+	    for (i = 0; i < keys.length; i++) {
+	      var key = keys[i];
+	      var value = stringify(node[key]);
+	      if (!value) continue;
+	      if (out) out += ',';
+	      out += JSON.stringify(key) + ':' + value;
+	    }
 
-	        gj = gj || {};
-	        if (Object.keys(gj).length) {
-	            _geojson = ensureIDs(gj);
-	            _src = extension + ' data file';
-	            this.fitZoom();
-	        }
+	    seen.splice(seenIndex, 1);
+	    return '{' + out + '}';
+	  }(data);
+	};
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	var $$1 = _export;
+	var $entries = objectToArray.entries;
 
+	// `Object.entries` method
+	// https://tc39.es/ecma262/#sec-object.entries
+	$$1({ target: 'Object', stat: true }, {
+	  entries: function entries(O) {
+	    return $entries(O);
+	  }
+	});
 
-	    drawData.showLabels = function(val) {
-	        if (!arguments.length) { return _showLabels; }
+	var _marked = /*#__PURE__*/regeneratorRuntime.mark(gpxGen),
+	    _marked3 = /*#__PURE__*/regeneratorRuntime.mark(kmlGen);
 
-	        _showLabels = val;
-	        return this;
-	    };
+	// cast array x into numbers
+	// get the content of a text node, if any
+	function nodeVal(x) {
+	  if (x && x.normalize) {
+	    x.normalize();
+	  }
 
+	  return x && x.textContent || "";
+	} // one Y child of X, if any, otherwise null
 
-	    drawData.enabled = function(val) {
-	        if (!arguments.length) { return _enabled; }
 
-	        _enabled = val;
-	        if (_enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
+	function get1(x, y) {
+	  var n = x.getElementsByTagName(y);
+	  return n.length ? n[0] : null;
+	}
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	function getLineStyle(extensions) {
+	  var style = {};
 
+	  if (extensions) {
+	    var lineStyle = get1(extensions, "line");
 
-	    drawData.hasData = function() {
-	        var gj = _geojson || {};
-	        return !!(_template || Object.keys(gj).length);
-	    };
+	    if (lineStyle) {
+	      var color = nodeVal(get1(lineStyle, "color")),
+	          opacity = parseFloat(nodeVal(get1(lineStyle, "opacity"))),
+	          width = parseFloat(nodeVal(get1(lineStyle, "width")));
+	      if (color) style.stroke = color;
+	      if (!isNaN(opacity)) style["stroke-opacity"] = opacity; // GPX width is in mm, convert to px with 96 px per inch
 
+	      if (!isNaN(width)) style["stroke-width"] = width * 96 / 25.4;
+	    }
+	  }
 
-	    drawData.template = function(val, src) {
-	        if (!arguments.length) { return _template; }
+	  return style;
+	} // get the contents of multiple text nodes, if present
 
-	        // test source against OSM imagery blacklists..
-	        var osm = context.connection();
-	        if (osm) {
-	            var blacklists = osm.imageryBlacklists();
-	            var fail = false;
-	            var tested = 0;
-	            var regex;
 
-	            for (var i = 0; i < blacklists.length; i++) {
-	                try {
-	                    regex = new RegExp(blacklists[i]);
-	                    fail = regex.test(val);
-	                    tested++;
-	                    if (fail) { break; }
-	                } catch (e) {
-	                    /* noop */
-	                }
-	            }
+	function getMulti(x, ys) {
+	  var o = {};
+	  var n;
+	  var k;
 
-	            // ensure at least one test was run.
-	            if (!tested) {
-	                regex = new RegExp('.*\.google(apis)?\..*/(vt|kh)[\?/].*([xyz]=.*){3}.*');
-	                fail = regex.test(val);
-	            }
-	        }
+	  for (k = 0; k < ys.length; k++) {
+	    n = get1(x, ys[k]);
+	    if (n) o[ys[k]] = nodeVal(n);
+	  }
 
-	        _template = val;
-	        _fileList = null;
-	        _geojson = null;
+	  return o;
+	}
 
-	        // strip off the querystring/hash from the template,
-	        // it often includes the access token
-	        _src = src || ('vectortile:' + val.split(/[?#]/)[0]);
+	function getProperties$1(node) {
+	  var prop = getMulti(node, ["name", "cmt", "desc", "type", "time", "keywords"]); // Parse additional data from our Garmin extension(s)
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	  var extensions = node.getElementsByTagNameNS("http://www.garmin.com/xmlschemas/GpxExtensions/v3", "*");
 
+	  for (var i = 0; i < extensions.length; i++) {
+	    var extension = extensions[i]; // Ignore nested extensions, like those on routepoints or trackpoints
 
-	    drawData.geojson = function(gj, src) {
-	        if (!arguments.length) { return _geojson; }
+	    if (extension.parentNode.parentNode === node) {
+	      prop[extension.tagName.replace(":", "_")] = nodeVal(extension);
+	    }
+	  }
 
-	        _template = null;
-	        _fileList = null;
-	        _geojson = null;
-	        _src = null;
+	  var links = node.getElementsByTagName("link");
+	  if (links.length) prop.links = [];
 
-	        gj = gj || {};
-	        if (Object.keys(gj).length) {
-	            _geojson = ensureIDs(gj);
-	            _src = src || 'unknown.geojson';
-	        }
+	  for (var _i = 0; _i < links.length; _i++) {
+	    prop.links.push(Object.assign({
+	      href: links[_i].getAttribute("href")
+	    }, getMulti(links[_i], ["text", "type"])));
+	  }
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	  return prop;
+	}
 
+	function coordPair$1(x) {
+	  var ll = [parseFloat(x.getAttribute("lon")), parseFloat(x.getAttribute("lat"))];
+	  var ele = get1(x, "ele"); // handle namespaced attribute in browser
 
-	    drawData.fileList = function(fileList) {
-	        if (!arguments.length) { return _fileList; }
+	  var heart = get1(x, "gpxtpx:hr") || get1(x, "hr");
+	  var time = get1(x, "time");
+	  var e;
 
-	        _template = null;
-	        _fileList = fileList;
-	        _geojson = null;
-	        _src = null;
+	  if (ele) {
+	    e = parseFloat(nodeVal(ele));
 
-	        if (!fileList || !fileList.length) { return this; }
-	        var f = fileList[0];
-	        var extension = getExtension(f.name);
-	        var reader = new FileReader();
-	        reader.onload = (function() {
-	            return function(e) {
-	                drawData.setFile(extension, e.target.result);
-	            };
-	        })();
+	    if (!isNaN(e)) {
+	      ll.push(e);
+	    }
+	  }
 
-	        reader.readAsText(f);
+	  var result = {
+	    coordinates: ll,
+	    time: time ? nodeVal(time) : null,
+	    extendedValues: []
+	  };
 
-	        return this;
-	    };
+	  if (heart) {
+	    result.extendedValues.push(["heart", parseFloat(nodeVal(heart))]);
+	  }
 
+	  var extensions = get1(x, "extensions");
 
-	    drawData.url = function(url, defaultExtension) {
-	        _template = null;
-	        _fileList = null;
-	        _geojson = null;
-	        _src = null;
-
-	        // strip off any querystring/hash from the url before checking extension
-	        var testUrl = url.split(/[?#]/)[0];
-	        var extension = getExtension(testUrl) || defaultExtension;
-	        if (extension) {
-	            _template = null;
-	            d3_text(url)
-	                .then(function(data) {
-	                    drawData.setFile(extension, data);
-	                })
-	                .catch(function() {
-	                    /* ignore */
-	                });
+	  if (extensions !== null) {
+	    for (var _i2 = 0, _arr = ["speed", "course", "hAcc", "vAcc"]; _i2 < _arr.length; _i2++) {
+	      var name = _arr[_i2];
+	      var v = parseFloat(nodeVal(get1(extensions, name)));
 
-	        } else {
-	            drawData.template(url);
-	        }
+	      if (!isNaN(v)) {
+	        result.extendedValues.push([name, v]);
+	      }
+	    }
+	  }
 
-	        return this;
-	    };
+	  return result;
+	}
 
+	function getRoute(node) {
+	  var line = getPoints$1(node, "rtept");
+	  if (!line) return;
+	  return {
+	    type: "Feature",
+	    properties: Object.assign(getProperties$1(node), getLineStyle(get1(node, "extensions")), {
+	      _gpxType: "rte"
+	    }),
+	    geometry: {
+	      type: "LineString",
+	      coordinates: line.line
+	    }
+	  };
+	}
 
-	    drawData.getSrc = function() {
-	        return _src || '';
-	    };
+	function getPoints$1(node, pointname) {
+	  var pts = node.getElementsByTagName(pointname);
+	  if (pts.length < 2) return; // Invalid line in GeoJSON
 
+	  var line = [];
+	  var times = [];
+	  var extendedValues = {};
 
-	    drawData.fitZoom = function() {
-	        var features = getFeatures(_geojson);
-	        if (!features.length) { return; }
-
-	        var map = context.map();
-	        var viewport = map.trimmedExtent().polygon();
-	        var coords = features.reduce(function(coords, feature) {
-	            var geom = feature.geometry;
-	            if (!geom) { return coords; }
-
-	            var c = geom.coordinates;
-
-	            /* eslint-disable no-fallthrough */
-	            switch (geom.type) {
-	                case 'Point':
-	                    c = [c];
-	                case 'MultiPoint':
-	                case 'LineString':
-	                    break;
-
-	                case 'MultiPolygon':
-	                    c = utilArrayFlatten(c);
-	                case 'Polygon':
-	                case 'MultiLineString':
-	                    c = utilArrayFlatten(c);
-	                    break;
-	            }
-	            /* eslint-enable no-fallthrough */
+	  for (var i = 0; i < pts.length; i++) {
+	    var c = coordPair$1(pts[i]);
+	    line.push(c.coordinates);
+	    if (c.time) times.push(c.time);
 
-	            return utilArrayUnion(coords, c);
-	        }, []);
+	    for (var j = 0; j < c.extendedValues.length; j++) {
+	      var _c$extendedValues$j = _slicedToArray(c.extendedValues[j], 2),
+	          name = _c$extendedValues$j[0],
+	          val = _c$extendedValues$j[1];
 
-	        if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
-	            var extent = geoExtent(d3_geoBounds({ type: 'LineString', coordinates: coords }));
-	            map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
-	        }
+	      var plural = name === "heart" ? name : name + "s";
 
-	        return this;
-	    };
+	      if (!extendedValues[plural]) {
+	        extendedValues[plural] = Array(pts.length).fill(null);
+	      }
 
+	      extendedValues[plural][i] = val;
+	    }
+	  }
 
-	    init();
-	    return drawData;
+	  return {
+	    line: line,
+	    times: times,
+	    extendedValues: extendedValues
+	  };
 	}
 
-	function svgDebug(projection, context) {
+	function getTrack(node) {
+	  var segments = node.getElementsByTagName("trkseg");
+	  var track = [];
+	  var times = [];
+	  var extractedLines = [];
 
-	  function drawDebug(selection) {
-	    var showTile = context.getDebug('tile');
-	    var showCollision = context.getDebug('collision');
-	    var showImagery = context.getDebug('imagery');
-	    var showTouchTargets = context.getDebug('target');
-	    var showDownloaded = context.getDebug('downloaded');
+	  for (var i = 0; i < segments.length; i++) {
+	    var line = getPoints$1(segments[i], "trkpt");
 
-	    var debugData = [];
-	    if (showTile) {
-	      debugData.push({ class: 'red', label: 'tile' });
-	    }
-	    if (showCollision) {
-	      debugData.push({ class: 'yellow', label: 'collision' });
-	    }
-	    if (showImagery) {
-	      debugData.push({ class: 'orange', label: 'imagery' });
-	    }
-	    if (showTouchTargets) {
-	      debugData.push({ class: 'pink', label: 'touchTargets' });
+	    if (line) {
+	      extractedLines.push(line);
+	      if (line.times && line.times.length) times.push(line.times);
 	    }
-	    if (showDownloaded) {
-	      debugData.push({ class: 'purple', label: 'downloaded' });
+	  }
+
+	  if (extractedLines.length === 0) return;
+	  var multi = extractedLines.length > 1;
+	  var properties = Object.assign(getProperties$1(node), getLineStyle(get1(node, "extensions")), {
+	    _gpxType: "trk"
+	  }, times.length ? {
+	    coordinateProperties: {
+	      times: multi ? times : times[0]
 	    }
+	  } : {});
 
+	  for (var _i3 = 0; _i3 < extractedLines.length; _i3++) {
+	    var _line = extractedLines[_i3];
+	    track.push(_line.line);
 
-	    var legend = context.container().select('.main-content')
-	      .selectAll('.debug-legend')
-	      .data(debugData.length ? [0] : []);
+	    for (var _i4 = 0, _Object$entries = Object.entries(_line.extendedValues); _i4 < _Object$entries.length; _i4++) {
+	      var _Object$entries$_i = _slicedToArray(_Object$entries[_i4], 2),
+	          name = _Object$entries$_i[0],
+	          val = _Object$entries$_i[1];
 
-	    legend.exit()
-	      .remove();
+	      var props = properties;
 
-	    legend = legend.enter()
-	      .append('div')
-	      .attr('class', 'fillD debug-legend')
-	      .merge(legend);
+	      if (name === "heart") {
+	        if (!properties.coordinateProperties) {
+	          properties.coordinateProperties = {};
+	        }
 
+	        props = properties.coordinateProperties;
+	      }
 
-	    var legendItems = legend.selectAll('.debug-legend-item')
-	      .data(debugData, function (d) { return d.label; });
+	      if (multi) {
+	        if (!props[name]) props[name] = extractedLines.map(function (line) {
+	          return new Array(line.line.length).fill(null);
+	        });
+	        props[name][_i3] = val;
+	      } else {
+	        props[name] = val;
+	      }
+	    }
+	  }
 
-	    legendItems.exit()
-	      .remove();
+	  return {
+	    type: "Feature",
+	    properties: properties,
+	    geometry: multi ? {
+	      type: "MultiLineString",
+	      coordinates: track
+	    } : {
+	      type: "LineString",
+	      coordinates: track[0]
+	    }
+	  };
+	}
 
-	    legendItems.enter()
-	      .append('span')
-	      .attr('class', function (d) { return ("debug-legend-item " + (d.class)); })
-	      .text(function (d) { return d.label; });
+	function getPoint(node) {
+	  return {
+	    type: "Feature",
+	    properties: Object.assign(getProperties$1(node), getMulti(node, ["sym"])),
+	    geometry: {
+	      type: "Point",
+	      coordinates: coordPair$1(node).coordinates
+	    }
+	  };
+	}
 
+	function gpxGen(doc) {
+	  var tracks, routes, waypoints, i, feature, _i5, _feature, _i6;
 
-	    var layer = selection.selectAll('.layer-debug')
-	      .data(showImagery || showDownloaded ? [0] : []);
+	  return regeneratorRuntime.wrap(function gpxGen$(_context) {
+	    while (1) {
+	      switch (_context.prev = _context.next) {
+	        case 0:
+	          tracks = doc.getElementsByTagName("trk");
+	          routes = doc.getElementsByTagName("rte");
+	          waypoints = doc.getElementsByTagName("wpt");
+	          i = 0;
 
-	    layer.exit()
-	      .remove();
+	        case 4:
+	          if (!(i < tracks.length)) {
+	            _context.next = 12;
+	            break;
+	          }
 
-	    layer = layer.enter()
-	      .append('g')
-	      .attr('class', 'layer-debug')
-	      .merge(layer);
+	          feature = getTrack(tracks[i]);
 
+	          if (!feature) {
+	            _context.next = 9;
+	            break;
+	          }
 
-	    // imagery
-	    var extent = context.map().extent();
-	    _mainFileFetcher.get('imagery')
-	      .then(function (d) {
-	        var hits = (showImagery && d.query.bbox(extent.rectangle(), true)) || [];
-	        var features = hits.map(function (d) { return d.features[d.id]; });
+	          _context.next = 9;
+	          return feature;
 
-	        var imagery = layer.selectAll('path.debug-imagery')
-	          .data(features);
+	        case 9:
+	          i++;
+	          _context.next = 4;
+	          break;
 
-	        imagery.exit()
-	          .remove();
+	        case 12:
+	          _i5 = 0;
 
-	        imagery.enter()
-	          .append('path')
-	          .attr('class', 'debug-imagery debug orange');
-	      })
-	      .catch(function () { /* ignore */ });
+	        case 13:
+	          if (!(_i5 < routes.length)) {
+	            _context.next = 21;
+	            break;
+	          }
 
-	    // downloaded
-	    var osm = context.connection();
-	    var dataDownloaded = [];
-	    if (osm && showDownloaded) {
-	      var rtree = osm.caches('get').tile.rtree;
-	      dataDownloaded = rtree.all().map(function (bbox) {
-	        return {
-	          type: 'Feature',
-	          properties: { id: bbox.id },
-	          geometry: {
-	            type: 'Polygon',
-	            coordinates: [[
-	              [ bbox.minX, bbox.minY ],
-	              [ bbox.minX, bbox.maxY ],
-	              [ bbox.maxX, bbox.maxY ],
-	              [ bbox.maxX, bbox.minY ],
-	              [ bbox.minX, bbox.minY ]
-	            ]]
+	          _feature = getRoute(routes[_i5]);
+
+	          if (!_feature) {
+	            _context.next = 18;
+	            break;
 	          }
-	        };
-	      });
-	    }
 
-	    var downloaded = layer
-	      .selectAll('path.debug-downloaded')
-	      .data(showDownloaded ? dataDownloaded : []);
+	          _context.next = 18;
+	          return _feature;
 
-	    downloaded.exit()
-	      .remove();
+	        case 18:
+	          _i5++;
+	          _context.next = 13;
+	          break;
 
-	    downloaded.enter()
-	      .append('path')
-	      .attr('class', 'debug-downloaded debug purple');
+	        case 21:
+	          _i6 = 0;
 
-	    // update
-	    layer.selectAll('path')
-	      .attr('d', svgPath(projection).geojson);
-	  }
+	        case 22:
+	          if (!(_i6 < waypoints.length)) {
+	            _context.next = 28;
+	            break;
+	          }
 
+	          _context.next = 25;
+	          return getPoint(waypoints[_i6]);
 
-	  // This looks strange because `enabled` methods on other layers are
-	  // chainable getter/setters, and this one is just a getter.
-	  drawDebug.enabled = function() {
-	    if (!arguments.length) {
-	      return context.getDebug('tile') ||
-	        context.getDebug('collision') ||
-	        context.getDebug('imagery') ||
-	        context.getDebug('target') ||
-	        context.getDebug('downloaded');
-	    } else {
-	        return this;
+	        case 25:
+	          _i6++;
+	          _context.next = 22;
+	          break;
+
+	        case 28:
+	        case "end":
+	          return _context.stop();
+	      }
 	    }
+	  }, _marked);
+	}
+
+	function gpx(doc) {
+	  return {
+	    type: "FeatureCollection",
+	    features: Array.from(gpxGen(doc))
 	  };
+	}
 
+	var removeSpace = /\s*/g;
+	var trimSpace = /^\s*|\s*$/g;
+	var splitSpace = /\s+/; // generate a short, numeric hash of a string
 
-	  return drawDebug;
-	}
+	function okhash(x) {
+	  if (!x || !x.length) return 0;
+	  var h = 0;
 
-	var _layerEnabled = false;
-	var _qaService;
+	  for (var i = 0; i < x.length; i++) {
+	    h = (h << 5) - h + x.charCodeAt(i) | 0;
+	  }
 
-	function svgKeepRight(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () { return dispatch.call('change'); }, 1000);
-	  var minZoom = 12;
+	  return h;
+	} // get one coordinate from a coordinate array, if any
 
-	  var touchLayer = select(null);
-	  var drawLayer = select(null);
-	  var layerVisible = false;
 
-	  function markerPath(selection, klass) {
-	    selection
-	      .attr('class', klass)
-	      .attr('transform', 'translate(-4, -24)')
-	      .attr('d', 'M11.6,6.2H7.1l1.4-5.1C8.6,0.6,8.1,0,7.5,0H2.2C1.7,0,1.3,0.3,1.3,0.8L0,10.2c-0.1,0.6,0.4,1.1,0.9,1.1h4.6l-1.8,7.6C3.6,19.4,4.1,20,4.7,20c0.3,0,0.6-0.2,0.8-0.5l6.9-11.9C12.7,7,12.3,6.2,11.6,6.2z');
-	  }
+	function coord1(v) {
+	  return v.replace(removeSpace, "").split(",").map(parseFloat);
+	} // get all coordinates from a coordinate array as [[],[]]
 
-	  // Loosely-coupled keepRight service for fetching issues.
-	  function getService() {
-	    if (services.keepRight && !_qaService) {
-	      _qaService = services.keepRight;
-	      _qaService.on('loaded', throttledRedraw);
-	    } else if (!services.keepRight && _qaService) {
-	      _qaService = null;
-	    }
 
-	    return _qaService;
-	  }
+	function coord(v) {
+	  return v.replace(trimSpace, "").split(splitSpace).map(coord1);
+	}
 
-	  // Show the markers
-	  function editOn() {
-	    if (!layerVisible) {
-	      layerVisible = true;
-	      drawLayer
-	        .style('display', 'block');
-	    }
-	  }
+	function xml2str(node) {
+	  if (node.xml !== undefined) return node.xml;
 
-	  // Immediately remove the markers and their touch targets
-	  function editOff() {
-	    if (layerVisible) {
-	      layerVisible = false;
-	      drawLayer
-	        .style('display', 'none');
-	      drawLayer.selectAll('.qaItem.keepRight')
-	        .remove();
-	      touchLayer.selectAll('.qaItem.keepRight')
-	        .remove();
+	  if (node.tagName) {
+	    var output = node.tagName;
+
+	    for (var i = 0; i < node.attributes.length; i++) {
+	      output += node.attributes[i].name + node.attributes[i].value;
 	    }
-	  }
 
-	  // Enable the layer.  This shows the markers and transitions them to visible.
-	  function layerOn() {
-	    editOn();
+	    for (var _i9 = 0; _i9 < node.childNodes.length; _i9++) {
+	      output += xml2str(node.childNodes[_i9]);
+	    }
 
-	    drawLayer
-	      .style('opacity', 0)
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 1)
-	      .on('end interrupt', function () { return dispatch.call('change'); });
+	    return output;
 	  }
 
-	  // Disable the layer.  This transitions the layer invisible and then hides the markers.
-	  function layerOff() {
-	    throttledRedraw.cancel();
-	    drawLayer.interrupt();
-	    touchLayer.selectAll('.qaItem.keepRight')
-	      .remove();
-
-	    drawLayer
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 0)
-	      .on('end interrupt', function () {
-	        editOff();
-	        dispatch.call('change');
-	      });
+	  if (node.nodeName === "#text") {
+	    return (node.nodeValue || node.value || "").trim();
 	  }
 
-	  // Update the issue markers
-	  function updateMarkers() {
-	    if (!layerVisible || !_layerEnabled) { return; }
+	  if (node.nodeName === "#cdata-section") {
+	    return node.nodeValue;
+	  }
 
-	    var service = getService();
-	    var selectedID = context.selectedErrorID();
-	    var data = (service ? service.getItems(projection) : []);
-	    var getTransform = svgPointTransform(projection);
+	  return "";
+	}
 
-	    // Draw markers..
-	    var markers = drawLayer.selectAll('.qaItem.keepRight')
-	      .data(data, function (d) { return d.id; });
+	var geotypes = ["Polygon", "LineString", "Point", "Track", "gx:Track"];
 
-	    // exit
-	    markers.exit()
-	      .remove();
+	function kmlColor(properties, elem, prefix) {
+	  var v = nodeVal(get1(elem, "color")) || "";
+	  var colorProp = prefix == "stroke" || prefix === "fill" ? prefix : prefix + "-color";
 
-	    // enter
-	    var markersEnter = markers.enter()
-	      .append('g')
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.parentIssueType)); });
-
-	    markersEnter
-	      .append('ellipse')
-	        .attr('cx', 0.5)
-	        .attr('cy', 1)
-	        .attr('rx', 6.5)
-	        .attr('ry', 3)
-	        .attr('class', 'stroke');
-
-	    markersEnter
-	      .append('path')
-	        .call(markerPath, 'shadow');
-
-	    markersEnter
-	      .append('use')
-	        .attr('class', 'qaItem-fill')
-	        .attr('width', '20px')
-	        .attr('height', '20px')
-	        .attr('x', '-8px')
-	        .attr('y', '-22px')
-	        .attr('xlink:href', '#iD-icon-bolt');
+	  if (v.substr(0, 1) === "#") {
+	    v = v.substr(1);
+	  }
 
-	    // update
-	    markers
-	      .merge(markersEnter)
-	      .sort(sortY)
-	        .classed('selected', function (d) { return d.id === selectedID; })
-	        .attr('transform', getTransform);
+	  if (v.length === 6 || v.length === 3) {
+	    properties[colorProp] = v;
+	  } else if (v.length === 8) {
+	    properties[prefix + "-opacity"] = parseInt(v.substr(0, 2), 16) / 255;
+	    properties[colorProp] = "#" + v.substr(6, 2) + v.substr(4, 2) + v.substr(2, 2);
+	  }
+	}
 
+	function numericProperty(properties, elem, source, target) {
+	  var val = parseFloat(nodeVal(get1(elem, source)));
+	  if (!isNaN(val)) properties[target] = val;
+	}
 
-	    // Draw targets..
-	    if (touchLayer.empty()) { return; }
-	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	function gxCoords(root) {
+	  var elems = root.getElementsByTagName("coord");
+	  var coords = [];
+	  var times = [];
+	  if (elems.length === 0) elems = root.getElementsByTagName("gx:coord");
 
-	    var targets = touchLayer.selectAll('.qaItem.keepRight')
-	      .data(data, function (d) { return d.id; });
+	  for (var i = 0; i < elems.length; i++) {
+	    coords.push(nodeVal(elems[i]).split(" ").map(parseFloat));
+	  }
 
-	    // exit
-	    targets.exit()
-	      .remove();
+	  var timeElems = root.getElementsByTagName("when");
 
-	    // enter/update
-	    targets.enter()
-	      .append('rect')
-	        .attr('width', '20px')
-	        .attr('height', '20px')
-	        .attr('x', '-8px')
-	        .attr('y', '-22px')
-	      .merge(targets)
-	      .sort(sortY)
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " target " + fillClass + " itemId-" + (d.id)); })
-	        .attr('transform', getTransform);
+	  for (var j = 0; j < timeElems.length; j++) {
+	    times.push(nodeVal(timeElems[j]));
+	  }
 
+	  return {
+	    coords: coords,
+	    times: times
+	  };
+	}
 
-	    function sortY(a, b) {
-	      return (a.id === selectedID) ? 1
-	        : (b.id === selectedID) ? -1
-	        : (a.severity === 'error' && b.severity !== 'error') ? 1
-	        : (b.severity === 'error' && a.severity !== 'error') ? -1
-	        : b.loc[1] - a.loc[1];
-	    }
+	function getGeometry(root) {
+	  var geomNode;
+	  var geomNodes;
+	  var i;
+	  var j;
+	  var k;
+	  var geoms = [];
+	  var coordTimes = [];
+
+	  if (get1(root, "MultiGeometry")) {
+	    return getGeometry(get1(root, "MultiGeometry"));
 	  }
 
-	  // Draw the keepRight layer and schedule loading issues and updating markers.
-	  function drawKeepRight(selection) {
-	    var service = getService();
+	  if (get1(root, "MultiTrack")) {
+	    return getGeometry(get1(root, "MultiTrack"));
+	  }
 
-	    var surface = context.surface();
-	    if (surface && !surface.empty()) {
-	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-	    }
+	  if (get1(root, "gx:MultiTrack")) {
+	    return getGeometry(get1(root, "gx:MultiTrack"));
+	  }
 
-	    drawLayer = selection.selectAll('.layer-keepRight')
-	      .data(service ? [0] : []);
+	  for (i = 0; i < geotypes.length; i++) {
+	    geomNodes = root.getElementsByTagName(geotypes[i]);
 
-	    drawLayer.exit()
-	      .remove();
+	    if (geomNodes) {
+	      for (j = 0; j < geomNodes.length; j++) {
+	        geomNode = geomNodes[j];
 
-	    drawLayer = drawLayer.enter()
-	      .append('g')
-	        .attr('class', 'layer-keepRight')
-	        .style('display', _layerEnabled ? 'block' : 'none')
-	      .merge(drawLayer);
+	        if (geotypes[i] === "Point") {
+	          geoms.push({
+	            type: "Point",
+	            coordinates: coord1(nodeVal(get1(geomNode, "coordinates")))
+	          });
+	        } else if (geotypes[i] === "LineString") {
+	          geoms.push({
+	            type: "LineString",
+	            coordinates: coord(nodeVal(get1(geomNode, "coordinates")))
+	          });
+	        } else if (geotypes[i] === "Polygon") {
+	          var rings = geomNode.getElementsByTagName("LinearRing"),
+	              coords = [];
 
-	    if (_layerEnabled) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        service.loadIssues(projection);
-	        updateMarkers();
-	      } else {
-	        editOff();
+	          for (k = 0; k < rings.length; k++) {
+	            coords.push(coord(nodeVal(get1(rings[k], "coordinates"))));
+	          }
+
+	          geoms.push({
+	            type: "Polygon",
+	            coordinates: coords
+	          });
+	        } else if (geotypes[i] === "Track" || geotypes[i] === "gx:Track") {
+	          var track = gxCoords(geomNode);
+	          geoms.push({
+	            type: "LineString",
+	            coordinates: track.coords
+	          });
+	          if (track.times.length) coordTimes.push(track.times);
+	        }
 	      }
 	    }
 	  }
 
-	  // Toggles the layer on and off
-	  drawKeepRight.enabled = function(val) {
-	    if (!arguments.length) { return _layerEnabled; }
+	  return {
+	    geoms: geoms,
+	    coordTimes: coordTimes
+	  };
+	}
 
-	    _layerEnabled = val;
-	    if (_layerEnabled) {
-	      layerOn();
-	    } else {
-	      layerOff();
-	      if (context.selectedErrorID()) {
-	        context.enter(modeBrowse(context));
-	      }
+	function getPlacemark(root, styleIndex, styleMapIndex, styleByHash) {
+	  var geomsAndTimes = getGeometry(root);
+	  var i;
+	  var properties = {};
+	  var name = nodeVal(get1(root, "name"));
+	  var address = nodeVal(get1(root, "address"));
+	  var styleUrl = nodeVal(get1(root, "styleUrl"));
+	  var description = nodeVal(get1(root, "description"));
+	  var timeSpan = get1(root, "TimeSpan");
+	  var timeStamp = get1(root, "TimeStamp");
+	  var extendedData = get1(root, "ExtendedData");
+	  var iconStyle = get1(root, "IconStyle");
+	  var labelStyle = get1(root, "LabelStyle");
+	  var lineStyle = get1(root, "LineStyle");
+	  var polyStyle = get1(root, "PolyStyle");
+	  var visibility = get1(root, "visibility");
+	  if (name) properties.name = name;
+	  if (address) properties.address = address;
+
+	  if (styleUrl) {
+	    if (styleUrl[0] !== "#") {
+	      styleUrl = "#" + styleUrl;
 	    }
 
-	    dispatch.call('change');
-	    return this;
-	  };
+	    properties.styleUrl = styleUrl;
 
-	  drawKeepRight.supported = function () { return !!getService(); };
+	    if (styleIndex[styleUrl]) {
+	      properties.styleHash = styleIndex[styleUrl];
+	    }
 
-	  return drawKeepRight;
-	}
+	    if (styleMapIndex[styleUrl]) {
+	      properties.styleMapHash = styleMapIndex[styleUrl];
+	      properties.styleHash = styleIndex[styleMapIndex[styleUrl].normal];
+	    } // Try to populate the lineStyle or polyStyle since we got the style hash
 
-	function svgGeolocate(projection) {
-	    var layer = select(null);
-	    var _position;
 
+	    var style = styleByHash[properties.styleHash];
 
-	    function init() {
-	        if (svgGeolocate.initialized) { return; }  // run once
-	        svgGeolocate.enabled = false;
-	        svgGeolocate.initialized = true;
+	    if (style) {
+	      if (!iconStyle) iconStyle = get1(style, "IconStyle");
+	      if (!labelStyle) labelStyle = get1(style, "LabelStyle");
+	      if (!lineStyle) lineStyle = get1(style, "LineStyle");
+	      if (!polyStyle) polyStyle = get1(style, "PolyStyle");
 	    }
+	  }
 
-	    function showLayer() {
-	        layer.style('display', 'block');
-	    }
+	  if (description) properties.description = description;
+
+	  if (timeSpan) {
+	    var begin = nodeVal(get1(timeSpan, "begin"));
+	    var end = nodeVal(get1(timeSpan, "end"));
+	    properties.timespan = {
+	      begin: begin,
+	      end: end
+	    };
+	  }
+
+	  if (timeStamp) {
+	    properties.timestamp = nodeVal(get1(timeStamp, "when"));
+	  }
 
+	  if (iconStyle) {
+	    kmlColor(properties, iconStyle, "icon");
+	    numericProperty(properties, iconStyle, "scale", "icon-scale");
+	    numericProperty(properties, iconStyle, "heading", "icon-heading");
+	    var hotspot = get1(iconStyle, "hotSpot");
 
-	    function hideLayer() {
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0);
+	    if (hotspot) {
+	      var left = parseFloat(hotspot.getAttribute("x"));
+	      var top = parseFloat(hotspot.getAttribute("y"));
+	      if (!isNaN(left) && !isNaN(top)) properties["icon-offset"] = [left, top];
 	    }
 
-	    function layerOn() {
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1);
+	    var icon = get1(iconStyle, "Icon");
 
+	    if (icon) {
+	      var href = nodeVal(get1(icon, "href"));
+	      if (href) properties.icon = href;
 	    }
+	  }
+
+	  if (labelStyle) {
+	    kmlColor(properties, labelStyle, "label");
+	    numericProperty(properties, labelStyle, "scale", "label-scale");
+	  }
+
+	  if (lineStyle) {
+	    kmlColor(properties, lineStyle, "stroke");
+	    numericProperty(properties, lineStyle, "width", "stroke-width");
+	  }
 
-	    function layerOff() {
-	        layer.style('display', 'none');
+	  if (polyStyle) {
+	    kmlColor(properties, polyStyle, "fill");
+	    var fill = nodeVal(get1(polyStyle, "fill"));
+	    var outline = nodeVal(get1(polyStyle, "outline"));
+	    if (fill) properties["fill-opacity"] = fill === "1" ? properties["fill-opacity"] || 1 : 0;
+	    if (outline) properties["stroke-opacity"] = outline === "1" ? properties["stroke-opacity"] || 1 : 0;
+	  }
+
+	  if (extendedData) {
+	    var datas = extendedData.getElementsByTagName("Data"),
+	        simpleDatas = extendedData.getElementsByTagName("SimpleData");
+
+	    for (i = 0; i < datas.length; i++) {
+	      properties[datas[i].getAttribute("name")] = nodeVal(get1(datas[i], "value"));
 	    }
 
-	    function transform(d) {
-	        return svgPointTransform(projection)(d);
+	    for (i = 0; i < simpleDatas.length; i++) {
+	      properties[simpleDatas[i].getAttribute("name")] = nodeVal(simpleDatas[i]);
 	    }
+	  }
 
-	    function accuracy(accuracy, loc) { // converts accuracy to pixels...
-	        var degreesRadius = geoMetersToLat(accuracy),
-	            tangentLoc = [loc[0], loc[1] + degreesRadius],
-	            projectedTangent = projection(tangentLoc),
-	            projectedLoc = projection([loc[0], loc[1]]);
+	  if (visibility) {
+	    properties.visibility = nodeVal(visibility);
+	  }
 
-	        // southern most point will have higher pixel value...
-	       return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
-	    }
+	  if (geomsAndTimes.coordTimes.length) {
+	    properties.coordinateProperties = {
+	      times: geomsAndTimes.coordTimes.length === 1 ? geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes
+	    };
+	  }
 
-	    function update() {
-	        var geolocation = { loc: [_position.coords.longitude, _position.coords.latitude] };
+	  var feature = {
+	    type: "Feature",
+	    geometry: geomsAndTimes.geoms.length === 0 ? null : geomsAndTimes.geoms.length === 1 ? geomsAndTimes.geoms[0] : {
+	      type: "GeometryCollection",
+	      geometries: geomsAndTimes.geoms
+	    },
+	    properties: properties
+	  };
+	  if (root.getAttribute("id")) feature.id = root.getAttribute("id");
+	  return feature;
+	}
 
-	        var groups = layer.selectAll('.geolocations').selectAll('.geolocation')
-	            .data([geolocation]);
+	function kmlGen(doc) {
+	  var styleIndex, styleByHash, styleMapIndex, placemarks, styles, styleMaps, k, hash, l, pairs, pairsMap, m, j, feature;
+	  return regeneratorRuntime.wrap(function kmlGen$(_context3) {
+	    while (1) {
+	      switch (_context3.prev = _context3.next) {
+	        case 0:
+	          // styleindex keeps track of hashed styles in order to match feature
+	          styleIndex = {};
+	          styleByHash = {}; // stylemapindex keeps track of style maps to expose in properties
 
-	        groups.exit()
-	            .remove();
+	          styleMapIndex = {}; // atomic geospatial types supported by KML - MultiGeometry is
+	          // handled separately
+	          // all root placemarks in the file
 
-	        var pointsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', 'geolocation');
+	          placemarks = doc.getElementsByTagName("Placemark");
+	          styles = doc.getElementsByTagName("Style");
+	          styleMaps = doc.getElementsByTagName("StyleMap");
 
-	        pointsEnter
-	            .append('circle')
-	            .attr('class', 'geolocate-radius')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('fill', 'rgb(15,128,225)')
-	            .attr('fill-opacity', '0.3')
-	            .attr('r', '0');
+	          for (k = 0; k < styles.length; k++) {
+	            hash = okhash(xml2str(styles[k])).toString(16);
+	            styleIndex["#" + styles[k].getAttribute("id")] = hash;
+	            styleByHash[hash] = styles[k];
+	          }
 
-	        pointsEnter
-	            .append('circle')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('fill', 'rgb(15,128,225)')
-	            .attr('stroke', 'white')
-	            .attr('stroke-width', '1.5')
-	            .attr('r', '6');
+	          for (l = 0; l < styleMaps.length; l++) {
+	            styleIndex["#" + styleMaps[l].getAttribute("id")] = okhash(xml2str(styleMaps[l])).toString(16);
+	            pairs = styleMaps[l].getElementsByTagName("Pair");
+	            pairsMap = {};
 
-	        groups.merge(pointsEnter)
-	            .attr('transform', transform);
+	            for (m = 0; m < pairs.length; m++) {
+	              pairsMap[nodeVal(get1(pairs[m], "key"))] = nodeVal(get1(pairs[m], "styleUrl"));
+	            }
 
-	        layer.select('.geolocate-radius').attr('r', accuracy(_position.coords.accuracy, geolocation.loc));
-	    }
+	            styleMapIndex["#" + styleMaps[l].getAttribute("id")] = pairsMap;
+	          }
 
-	    function drawLocation(selection) {
-	        var enabled = svgGeolocate.enabled;
+	          j = 0;
 
-	        layer = selection.selectAll('.layer-geolocate')
-	            .data([0]);
+	        case 9:
+	          if (!(j < placemarks.length)) {
+	            _context3.next = 17;
+	            break;
+	          }
 
-	        layer.exit()
-	            .remove();
+	          feature = getPlacemark(placemarks[j], styleIndex, styleMapIndex, styleByHash);
 
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-geolocate')
-	            .style('display', enabled ? 'block' : 'none');
+	          if (!feature) {
+	            _context3.next = 14;
+	            break;
+	          }
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'geolocations');
+	          _context3.next = 14;
+	          return feature;
 
-	        layer = layerEnter
-	            .merge(layer);
+	        case 14:
+	          j++;
+	          _context3.next = 9;
+	          break;
 
-	        if (enabled) {
-	            update();
-	        } else {
-	            layerOff();
-	        }
+	        case 17:
+	        case "end":
+	          return _context3.stop();
+	      }
 	    }
+	  }, _marked3);
+	}
 
-	    drawLocation.enabled = function (position, enabled) {
-	        if (!arguments.length) { return svgGeolocate.enabled; }
-	        _position = position;
-	        svgGeolocate.enabled = enabled;
-	        if (svgGeolocate.enabled) {
-	            showLayer();
-	            layerOn();
-	        } else {
-	            hideLayer();
-	        }
-	        return this;
-	    };
-
-	    init();
-	    return drawLocation;
+	function kml(doc) {
+	  return {
+	    type: "FeatureCollection",
+	    features: Array.from(kmlGen(doc))
+	  };
 	}
 
-	function svgLabels(projection, context) {
-	    var path = d3_geoPath(projection);
-	    var detected = utilDetect();
-	    var baselineHack = (detected.ie ||
-	        detected.browser.toLowerCase() === 'edge' ||
-	        (detected.browser.toLowerCase() === 'firefox' && detected.version >= 70));
-	    var _rdrawn = new RBush();
-	    var _rskipped = new RBush();
-	    var _textWidthCache = {};
-	    var _entitybboxes = {};
-
-	    // Listed from highest to lowest priority
-	    var labelStack = [
-	        ['line', 'aeroway', '*', 12],
-	        ['line', 'highway', 'motorway', 12],
-	        ['line', 'highway', 'trunk', 12],
-	        ['line', 'highway', 'primary', 12],
-	        ['line', 'highway', 'secondary', 12],
-	        ['line', 'highway', 'tertiary', 12],
-	        ['line', 'highway', '*', 12],
-	        ['line', 'railway', '*', 12],
-	        ['line', 'waterway', '*', 12],
-	        ['area', 'aeroway', '*', 12],
-	        ['area', 'amenity', '*', 12],
-	        ['area', 'building', '*', 12],
-	        ['area', 'historic', '*', 12],
-	        ['area', 'leisure', '*', 12],
-	        ['area', 'man_made', '*', 12],
-	        ['area', 'natural', '*', 12],
-	        ['area', 'shop', '*', 12],
-	        ['area', 'tourism', '*', 12],
-	        ['area', 'camp_site', '*', 12],
-	        ['point', 'aeroway', '*', 10],
-	        ['point', 'amenity', '*', 10],
-	        ['point', 'building', '*', 10],
-	        ['point', 'historic', '*', 10],
-	        ['point', 'leisure', '*', 10],
-	        ['point', 'man_made', '*', 10],
-	        ['point', 'natural', '*', 10],
-	        ['point', 'shop', '*', 10],
-	        ['point', 'tourism', '*', 10],
-	        ['point', 'camp_site', '*', 10],
-	        ['line', 'name', '*', 12],
-	        ['area', 'name', '*', 12],
-	        ['point', 'name', '*', 10]
-	    ];
+	var _initialized = false;
+	var _enabled = false;
 
+	var _geojson;
 
-	    function shouldSkipIcon(preset) {
-	        var noIcons = ['building', 'landuse', 'natural'];
-	        return noIcons.some(function(s) {
-	            return preset.id.indexOf(s) >= 0;
-	        });
-	    }
+	function svgData(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
+	  var _showLabels = true;
+	  var detected = utilDetect();
+	  var layer = select(null);
 
-	    function get(array, prop) {
-	        return function(d, i) { return array[i][prop]; };
-	    }
+	  var _vtService;
 
+	  var _fileList;
 
-	    function textWidth(text, size, elem) {
-	        var c = _textWidthCache[size];
-	        if (!c) { c = _textWidthCache[size] = {}; }
+	  var _template;
 
-	        if (c[text]) {
-	            return c[text];
+	  var _src;
 
-	        } else if (elem) {
-	            c[text] = elem.getComputedTextLength();
-	            return c[text];
+	  function init() {
+	    if (_initialized) return; // run once
 
-	        } else {
-	            var str = encodeURIComponent(text).match(/%[CDEFcdef]/g);
-	            if (str === null) {
-	                return size / 3 * 2 * text.length;
-	            } else {
-	                return size / 3 * (2 * text.length + str.length);
-	            }
-	        }
+	    _geojson = {};
+	    _enabled = true;
+
+	    function over(d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      d3_event.dataTransfer.dropEffect = 'copy';
 	    }
 
+	    context.container().attr('dropzone', 'copy').on('drop.svgData', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      if (!detected.filedrop) return;
+	      drawData.fileList(d3_event.dataTransfer.files);
+	    }).on('dragenter.svgData', over).on('dragexit.svgData', over).on('dragover.svgData', over);
+	    _initialized = true;
+	  }
 
-	    function drawLinePaths(selection, entities, filter, classes, labels) {
-	        var paths = selection.selectAll('path')
-	            .filter(filter)
-	            .data(entities, osmEntity.key);
-
-	        // exit
-	        paths.exit()
-	            .remove();
-
-	        // enter/update
-	        paths.enter()
-	            .append('path')
-	            .style('stroke-width', get(labels, 'font-size'))
-	            .attr('id', function(d) { return 'ideditor-labelpath-' + d.id; })
-	            .attr('class', classes)
-	            .merge(paths)
-	            .attr('d', get(labels, 'lineString'));
-	    }
-
-
-	    function drawLineLabels(selection, entities, filter, classes, labels) {
-	        var texts = selection.selectAll('text.' + classes)
-	            .filter(filter)
-	            .data(entities, osmEntity.key);
-
-	        // exit
-	        texts.exit()
-	            .remove();
-
-	        // enter
-	        texts.enter()
-	            .append('text')
-	            .attr('class', function(d, i) { return classes + ' ' + labels[i].classes + ' ' + d.id; })
-	            .attr('dy', baselineHack ? '0.35em' : null)
-	            .append('textPath')
-	            .attr('class', 'textpath');
-
-	        // update
-	        selection.selectAll('text.' + classes).selectAll('.textpath')
-	            .filter(filter)
-	            .data(entities, osmEntity.key)
-	            .attr('startOffset', '50%')
-	            .attr('xlink:href', function(d) { return '#ideditor-labelpath-' + d.id; })
-	            .text(utilDisplayNameForPath);
-	    }
-
-
-	    function drawPointLabels(selection, entities, filter, classes, labels) {
-	        var texts = selection.selectAll('text.' + classes)
-	            .filter(filter)
-	            .data(entities, osmEntity.key);
-
-	        // exit
-	        texts.exit()
-	            .remove();
-
-	        // enter/update
-	        texts.enter()
-	            .append('text')
-	            .attr('class', function(d, i) {
-	                return classes + ' ' + labels[i].classes + ' ' + d.id;
-	            })
-	            .merge(texts)
-	            .attr('x', get(labels, 'x'))
-	            .attr('y', get(labels, 'y'))
-	            .style('text-anchor', get(labels, 'textAnchor'))
-	            .text(utilDisplayName)
-	            .each(function(d, i) {
-	                textWidth(utilDisplayName(d), labels[i].height, this);
-	            });
+	  function getService() {
+	    if (services.vectorTile && !_vtService) {
+	      _vtService = services.vectorTile;
+
+	      _vtService.event.on('loadedData', throttledRedraw);
+	    } else if (!services.vectorTile && _vtService) {
+	      _vtService = null;
 	    }
 
+	    return _vtService;
+	  }
 
-	    function drawAreaLabels(selection, entities, filter, classes, labels) {
-	        entities = entities.filter(hasText);
-	        labels = labels.filter(hasText);
-	        drawPointLabels(selection, entities, filter, classes, labels);
+	  function showLayer() {
+	    layerOn();
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+	      dispatch.call('change');
+	    });
+	  }
 
-	        function hasText(d, i) {
-	            return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
-	        }
-	    }
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', layerOff);
+	  }
 
+	  function layerOn() {
+	    layer.style('display', 'block');
+	  }
 
-	    function drawAreaIcons(selection, entities, filter, classes, labels) {
-	        var icons = selection.selectAll('use.' + classes)
-	            .filter(filter)
-	            .data(entities, osmEntity.key);
+	  function layerOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  } // ensure that all geojson features in a collection have IDs
 
-	        // exit
-	        icons.exit()
-	            .remove();
 
-	        // enter/update
-	        icons.enter()
-	            .append('use')
-	            .attr('class', 'icon ' + classes)
-	            .attr('width', '17px')
-	            .attr('height', '17px')
-	            .merge(icons)
-	            .attr('transform', get(labels, 'transform'))
-	            .attr('xlink:href', function(d) {
-	                var preset = _mainPresetIndex.match(d, context.graph());
-	                var picon = preset && preset.icon;
+	  function ensureIDs(gj) {
+	    if (!gj) return null;
 
-	                if (!picon) {
-	                    return '';
-	                } else {
-	                    var isMaki = /^maki-/.test(picon);
-	                    return '#' + picon + (isMaki ? '-15' : '');
-	                }
-	            });
+	    if (gj.type === 'FeatureCollection') {
+	      for (var i = 0; i < gj.features.length; i++) {
+	        ensureFeatureID(gj.features[i]);
+	      }
+	    } else {
+	      ensureFeatureID(gj);
 	    }
 
+	    return gj;
+	  } // ensure that each single Feature object has a unique ID
 
-	    function drawCollisionBoxes(selection, rtree, which) {
-	        var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
 
-	        var gj = [];
-	        if (context.getDebug('collision')) {
-	            gj = rtree.all().map(function(d) {
-	                return { type: 'Polygon', coordinates: [[
-	                    [d.minX, d.minY],
-	                    [d.maxX, d.minY],
-	                    [d.maxX, d.maxY],
-	                    [d.minX, d.maxY],
-	                    [d.minX, d.minY]
-	                ]]};
-	            });
-	        }
+	  function ensureFeatureID(feature) {
+	    if (!feature) return;
+	    feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
+	    return feature;
+	  } // Prefer an array of Features instead of a FeatureCollection
 
-	        var boxes = selection.selectAll('.' + which)
-	            .data(gj);
 
-	        // exit
-	        boxes.exit()
-	            .remove();
+	  function getFeatures(gj) {
+	    if (!gj) return [];
 
-	        // enter/update
-	        boxes.enter()
-	            .append('path')
-	            .attr('class', classes)
-	            .merge(boxes)
-	            .attr('d', d3_geoPath());
+	    if (gj.type === 'FeatureCollection') {
+	      return gj.features;
+	    } else {
+	      return [gj];
 	    }
+	  }
 
+	  function featureKey(d) {
+	    return d.__featurehash__;
+	  }
 
-	    function drawLabels(selection, graph, entities, filter, dimensions, fullRedraw) {
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
+	  function isPolygon(d) {
+	    return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
+	  }
 
-	        var labelable = [];
-	        var renderNodeAs = {};
-	        var i, j, k, entity, geometry;
+	  function clipPathID(d) {
+	    return 'ideditor-data-' + d.__featurehash__ + '-clippath';
+	  }
 
-	        for (i = 0; i < labelStack.length; i++) {
-	            labelable.push([]);
-	        }
+	  function featureClasses(d) {
+	    return ['data' + d.__featurehash__, d.geometry.type, isPolygon(d) ? 'area' : '', d.__layerID__ || ''].filter(Boolean).join(' ');
+	  }
 
-	        if (fullRedraw) {
-	            _rdrawn.clear();
-	            _rskipped.clear();
-	            _entitybboxes = {};
+	  function drawData(selection) {
+	    var vtService = getService();
+	    var getPath = svgPath(projection).geojson;
+	    var getAreaPath = svgPath(projection, null, true).geojson;
+	    var hasData = drawData.hasData();
+	    layer = selection.selectAll('.layer-mapdata').data(_enabled && hasData ? [0] : []);
+	    layer.exit().remove();
+	    layer = layer.enter().append('g').attr('class', 'layer-mapdata').merge(layer);
+	    var surface = context.surface();
+	    if (!surface || surface.empty()) return; // not ready to draw yet, starting up
+	    // Gather data
 
-	        } else {
-	            for (i = 0; i < entities.length; i++) {
-	                entity = entities[i];
-	                var toRemove = []
-	                    .concat(_entitybboxes[entity.id] || [])
-	                    .concat(_entitybboxes[entity.id + 'I'] || []);
-
-	                for (j = 0; j < toRemove.length; j++) {
-	                    _rdrawn.remove(toRemove[j]);
-	                    _rskipped.remove(toRemove[j]);
-	                }
-	            }
-	        }
+	    var geoData, polygonData;
+
+	    if (_template && vtService) {
+	      // fetch data from vector tile service
+	      var sourceID = _template;
+	      vtService.loadTiles(sourceID, _template, projection);
+	      geoData = vtService.data(sourceID, projection);
+	    } else {
+	      geoData = getFeatures(_geojson);
+	    }
+
+	    geoData = geoData.filter(getPath);
+	    polygonData = geoData.filter(isPolygon); // Draw clip paths for polygons
+
+	    var clipPaths = surface.selectAll('defs').selectAll('.clipPath-data').data(polygonData, featureKey);
+	    clipPaths.exit().remove();
+	    var clipPathsEnter = clipPaths.enter().append('clipPath').attr('class', 'clipPath-data').attr('id', clipPathID);
+	    clipPathsEnter.append('path');
+	    clipPaths.merge(clipPathsEnter).selectAll('path').attr('d', getAreaPath); // Draw fill, shadow, stroke layers
+
+	    var datagroups = layer.selectAll('g.datagroup').data(['fill', 'shadow', 'stroke']);
+	    datagroups = datagroups.enter().append('g').attr('class', function (d) {
+	      return 'datagroup datagroup-' + d;
+	    }).merge(datagroups); // Draw paths
+
+	    var pathData = {
+	      fill: polygonData,
+	      shadow: geoData,
+	      stroke: geoData
+	    };
+	    var paths = datagroups.selectAll('path').data(function (layer) {
+	      return pathData[layer];
+	    }, featureKey); // exit
+
+	    paths.exit().remove(); // enter/update
+
+	    paths = paths.enter().append('path').attr('class', function (d) {
+	      var datagroup = this.parentNode.__data__;
+	      return 'pathdata ' + datagroup + ' ' + featureClasses(d);
+	    }).attr('clip-path', function (d) {
+	      var datagroup = this.parentNode.__data__;
+	      return datagroup === 'fill' ? 'url(#' + clipPathID(d) + ')' : null;
+	    }).merge(paths).attr('d', function (d) {
+	      var datagroup = this.parentNode.__data__;
+	      return datagroup === 'fill' ? getAreaPath(d) : getPath(d);
+	    }); // Draw labels
+
+	    layer.call(drawLabels, 'label-halo', geoData).call(drawLabels, 'label', geoData);
+
+	    function drawLabels(selection, textClass, data) {
+	      var labelPath = d3_geoPath(projection);
+	      var labelData = data.filter(function (d) {
+	        return _showLabels && d.properties && (d.properties.desc || d.properties.name);
+	      });
+	      var labels = selection.selectAll('text.' + textClass).data(labelData, featureKey); // exit
+
+	      labels.exit().remove(); // enter/update
+
+	      labels = labels.enter().append('text').attr('class', function (d) {
+	        return textClass + ' ' + featureClasses(d);
+	      }).merge(labels).text(function (d) {
+	        return d.properties.desc || d.properties.name;
+	      }).attr('x', function (d) {
+	        var centroid = labelPath.centroid(d);
+	        return centroid[0] + 11;
+	      }).attr('y', function (d) {
+	        var centroid = labelPath.centroid(d);
+	        return centroid[1];
+	      });
+	    }
+	  }
 
-	        // Loop through all the entities to do some preprocessing
-	        for (i = 0; i < entities.length; i++) {
-	            entity = entities[i];
-	            geometry = entity.geometry(graph);
+	  function getExtension(fileName) {
+	    if (!fileName) return;
+	    var re = /\.(gpx|kml|(geo)?json)$/i;
+	    var match = fileName.toLowerCase().match(re);
+	    return match && match.length && match[0];
+	  }
 
-	            // Insert collision boxes around interesting points/vertices
-	            if (geometry === 'point' || (geometry === 'vertex' && isInterestingVertex(entity))) {
-	                var hasDirections = entity.directions(graph, projection).length;
-	                var markerPadding;
+	  function xmlToDom(textdata) {
+	    return new DOMParser().parseFromString(textdata, 'text/xml');
+	  }
 
-	                if (!wireframe && geometry === 'point' && !(zoom >= 18 && hasDirections)) {
-	                    renderNodeAs[entity.id] = 'point';
-	                    markerPadding = 20;   // extra y for marker height
-	                } else {
-	                    renderNodeAs[entity.id] = 'vertex';
-	                    markerPadding = 0;
-	                }
+	  function stringifyGeojsonProperties(feature) {
+	    var properties = feature.properties;
 
-	                var coord = projection(entity.loc);
-	                var nodePadding = 10;
-	                var bbox = {
-	                    minX: coord[0] - nodePadding,
-	                    minY: coord[1] - nodePadding - markerPadding,
-	                    maxX: coord[0] + nodePadding,
-	                    maxY: coord[1] + nodePadding
-	                };
+	    for (var key in properties) {
+	      var property = properties[key];
 
-	                doInsert(bbox, entity.id + 'P');
-	            }
+	      if (typeof property === 'number' || typeof property === 'boolean' || Array.isArray(property)) {
+	        properties[key] = property.toString();
+	      } else if (property === null) {
+	        properties[key] = 'null';
+	      } else if (_typeof(property) === 'object') {
+	        properties[key] = JSON.stringify(property);
+	      }
+	    }
+	  }
 
-	            // From here on, treat vertices like points
-	            if (geometry === 'vertex') {
-	                geometry = 'point';
-	            }
+	  drawData.setFile = function (extension, data) {
+	    _template = null;
+	    _fileList = null;
+	    _geojson = null;
+	    _src = null;
+	    var gj;
 
-	            // Determine which entities are label-able
-	            var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
-	            var icon = preset && !shouldSkipIcon(preset) && preset.icon;
+	    switch (extension) {
+	      case '.gpx':
+	        gj = gpx(xmlToDom(data));
+	        break;
 
-	            if (!icon && !utilDisplayName(entity))
-	                { continue; }
+	      case '.kml':
+	        gj = kml(xmlToDom(data));
+	        break;
 
-	            for (k = 0; k < labelStack.length; k++) {
-	                var matchGeom = labelStack[k][0];
-	                var matchKey = labelStack[k][1];
-	                var matchVal = labelStack[k][2];
-	                var hasVal = entity.tags[matchKey];
+	      case '.geojson':
+	      case '.json':
+	        gj = JSON.parse(data);
 
-	                if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
-	                    labelable[k].push(entity);
-	                    break;
-	                }
-	            }
+	        if (gj.type === 'FeatureCollection') {
+	          gj.features.forEach(stringifyGeojsonProperties);
+	        } else if (gj.type === 'Feature') {
+	          stringifyGeojsonProperties(gj);
 	        }
 
-	        var positions = {
-	            point: [],
-	            line: [],
-	            area: []
-	        };
+	        break;
+	    }
 
-	        var labelled = {
-	            point: [],
-	            line: [],
-	            area: []
-	        };
+	    gj = gj || {};
 
-	        // Try and find a valid label for labellable entities
-	        for (k = 0; k < labelable.length; k++) {
-	            var fontSize = labelStack[k][3];
+	    if (Object.keys(gj).length) {
+	      _geojson = ensureIDs(gj);
+	      _src = extension + ' data file';
+	      this.fitZoom();
+	    }
 
-	            for (i = 0; i < labelable[k].length; i++) {
-	                entity = labelable[k][i];
-	                geometry = entity.geometry(graph);
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	                var getName = (geometry === 'line') ? utilDisplayNameForPath : utilDisplayName;
-	                var name = getName(entity);
-	                var width = name && textWidth(name, fontSize);
-	                var p = null;
+	  drawData.showLabels = function (val) {
+	    if (!arguments.length) return _showLabels;
+	    _showLabels = val;
+	    return this;
+	  };
 
-	                if (geometry === 'point' || geometry === 'vertex') {
-	                    // no point or vertex labels in wireframe mode
-	                    // no vertex labels at low zooms (vertices have no icons)
-	                    if (wireframe) { continue; }
-	                    var renderAs = renderNodeAs[entity.id];
-	                    if (renderAs === 'vertex' && zoom < 17) { continue; }
+	  drawData.enabled = function (val) {
+	    if (!arguments.length) return _enabled;
+	    _enabled = val;
 
-	                    p = getPointLabel(entity, width, fontSize, renderAs);
+	    if (_enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
+	    }
 
-	                } else if (geometry === 'line') {
-	                    p = getLineLabel(entity, width, fontSize);
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	                } else if (geometry === 'area') {
-	                    p = getAreaLabel(entity, width, fontSize);
-	                }
+	  drawData.hasData = function () {
+	    var gj = _geojson || {};
+	    return !!(_template || Object.keys(gj).length);
+	  };
 
-	                if (p) {
-	                    if (geometry === 'vertex') { geometry = 'point'; }  // treat vertex like point
-	                    p.classes = geometry + ' tag-' + labelStack[k][1];
-	                    positions[geometry].push(p);
-	                    labelled[geometry].push(entity);
-	                }
-	            }
-	        }
+	  drawData.template = function (val, src) {
+	    if (!arguments.length) return _template; // test source against OSM imagery blocklists..
 
+	    var osm = context.connection();
 
-	        function isInterestingVertex(entity) {
-	            var selectedIDs = context.selectedIDs();
+	    if (osm) {
+	      var blocklists = osm.imageryBlocklists();
+	      var fail = false;
+	      var tested = 0;
+	      var regex;
 
-	            return entity.hasInterestingTags() ||
-	                entity.isEndpoint(graph) ||
-	                entity.isConnected(graph) ||
-	                selectedIDs.indexOf(entity.id) !== -1 ||
-	                graph.parentWays(entity).some(function(parent) {
-	                    return selectedIDs.indexOf(parent.id) !== -1;
-	                });
-	        }
+	      for (var i = 0; i < blocklists.length; i++) {
+	        regex = blocklists[i];
+	        fail = regex.test(val);
+	        tested++;
+	        if (fail) break;
+	      } // ensure at least one test was run.
 
 
-	        function getPointLabel(entity, width, height, geometry) {
-	            var y = (geometry === 'point' ? -12 : 0);
-	            var pointOffsets = {
-	                ltr: [15, y, 'start'],
-	                rtl: [-15, y, 'end']
-	            };
+	      if (!tested) {
+	        regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+	        fail = regex.test(val);
+	      }
+	    }
 
-	            var textDirection = _mainLocalizer.textDirection();
+	    _template = val;
+	    _fileList = null;
+	    _geojson = null; // strip off the querystring/hash from the template,
+	    // it often includes the access token
 
-	            var coord = projection(entity.loc);
-	            var textPadding = 2;
-	            var offset = pointOffsets[textDirection];
-	            var p = {
-	                height: height,
-	                width: width,
-	                x: coord[0] + offset[0],
-	                y: coord[1] + offset[1],
-	                textAnchor: offset[2]
-	            };
+	    _src = src || 'vectortile:' + val.split(/[?#]/)[0];
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	            // insert a collision box for the text label..
-	            var bbox;
-	            if (textDirection === 'rtl') {
-	                bbox = {
-	                    minX: p.x - width - textPadding,
-	                    minY: p.y - (height / 2) - textPadding,
-	                    maxX: p.x + textPadding,
-	                    maxY: p.y + (height / 2) + textPadding
-	                };
-	            } else {
-	                bbox = {
-	                    minX: p.x - textPadding,
-	                    minY: p.y - (height / 2) - textPadding,
-	                    maxX: p.x + width + textPadding,
-	                    maxY: p.y + (height / 2) + textPadding
-	                };
-	            }
+	  drawData.geojson = function (gj, src) {
+	    if (!arguments.length) return _geojson;
+	    _template = null;
+	    _fileList = null;
+	    _geojson = null;
+	    _src = null;
+	    gj = gj || {};
 
-	            if (tryInsert([bbox], entity.id, true)) {
-	                return p;
-	            }
-	        }
+	    if (Object.keys(gj).length) {
+	      _geojson = ensureIDs(gj);
+	      _src = src || 'unknown.geojson';
+	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	        function getLineLabel(entity, width, height) {
-	            var viewport = geoExtent(context.projection.clipExtent()).polygon();
-	            var points = graph.childNodes(entity)
-	                .map(function(node) { return projection(node.loc); });
-	            var length = geoPathLength(points);
+	  drawData.fileList = function (fileList) {
+	    if (!arguments.length) return _fileList;
+	    _template = null;
+	    _fileList = fileList;
+	    _geojson = null;
+	    _src = null;
+	    if (!fileList || !fileList.length) return this;
+	    var f = fileList[0];
+	    var extension = getExtension(f.name);
+	    var reader = new FileReader();
+
+	    reader.onload = function () {
+	      return function (e) {
+	        drawData.setFile(extension, e.target.result);
+	      };
+	    }();
 
-	            if (length < width + 20) { return; }
+	    reader.readAsText(f);
+	    return this;
+	  };
 
-	            // % along the line to attempt to place the label
-	            var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70,
-	                               25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
-	            var padding = 3;
+	  drawData.url = function (url, defaultExtension) {
+	    _template = null;
+	    _fileList = null;
+	    _geojson = null;
+	    _src = null; // strip off any querystring/hash from the url before checking extension
 
-	            for (var i = 0; i < lineOffsets.length; i++) {
-	                var offset = lineOffsets[i];
-	                var middle = offset / 100 * length;
-	                var start = middle - width / 2;
+	    var testUrl = url.split(/[?#]/)[0];
+	    var extension = getExtension(testUrl) || defaultExtension;
 
-	                if (start < 0 || start + width > length) { continue; }
+	    if (extension) {
+	      _template = null;
+	      d3_text(url).then(function (data) {
+	        drawData.setFile(extension, data);
+	      })["catch"](function () {
+	        /* ignore */
+	      });
+	    } else {
+	      drawData.template(url);
+	    }
 
-	                // generate subpath and ignore paths that are invalid or don't cross viewport.
-	                var sub = subpath(points, start, start + width);
-	                if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
-	                    continue;
-	                }
+	    return this;
+	  };
 
-	                var isReverse = reverse(sub);
-	                if (isReverse) {
-	                    sub = sub.reverse();
-	                }
+	  drawData.getSrc = function () {
+	    return _src || '';
+	  };
 
-	                var bboxes = [];
-	                var boxsize = (height + 2) / 2;
-
-	                for (var j = 0; j < sub.length - 1; j++) {
-	                    var a = sub[j];
-	                    var b = sub[j + 1];
-
-	                    // split up the text into small collision boxes
-	                    var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));
-
-	                    for (var box = 0; box < num; box++) {
-	                        var p = geoVecInterp(a, b, box / num);
-	                        var x0 = p[0] - boxsize - padding;
-	                        var y0 = p[1] - boxsize - padding;
-	                        var x1 = p[0] + boxsize + padding;
-	                        var y1 = p[1] + boxsize + padding;
-
-	                        bboxes.push({
-	                            minX: Math.min(x0, x1),
-	                            minY: Math.min(y0, y1),
-	                            maxX: Math.max(x0, x1),
-	                            maxY: Math.max(y0, y1)
-	                        });
-	                    }
-	                }
+	  drawData.fitZoom = function () {
+	    var features = getFeatures(_geojson);
+	    if (!features.length) return;
+	    var map = context.map();
+	    var viewport = map.trimmedExtent().polygon();
+	    var coords = features.reduce(function (coords, feature) {
+	      var geom = feature.geometry;
+	      if (!geom) return coords;
+	      var c = geom.coordinates;
+	      /* eslint-disable no-fallthrough */
 
-	                if (tryInsert(bboxes, entity.id, false)) {   // accept this one
-	                    return {
-	                        'font-size': height + 2,
-	                        lineString: lineString(sub),
-	                        startOffset: offset + '%'
-	                    };
-	                }
-	            }
+	      switch (geom.type) {
+	        case 'Point':
+	          c = [c];
 
-	            function reverse(p) {
-	                var angle = Math.atan2(p[1][1] - p[0][1], p[1][0] - p[0][0]);
-	                return !(p[0][0] < p[p.length - 1][0] && angle < Math.PI/2 && angle > -Math.PI/2);
-	            }
+	        case 'MultiPoint':
+	        case 'LineString':
+	          break;
 
-	            function lineString(points) {
-	                return 'M' + points.join('L');
-	            }
+	        case 'MultiPolygon':
+	          c = utilArrayFlatten(c);
 
-	            function subpath(points, from, to) {
-	                var sofar = 0;
-	                var start, end, i0, i1;
-
-	                for (var i = 0; i < points.length - 1; i++) {
-	                    var a = points[i];
-	                    var b = points[i + 1];
-	                    var current = geoVecLength(a, b);
-	                    var portion;
-	                    if (!start && sofar + current >= from) {
-	                        portion = (from - sofar) / current;
-	                        start = [
-	                            a[0] + portion * (b[0] - a[0]),
-	                            a[1] + portion * (b[1] - a[1])
-	                        ];
-	                        i0 = i + 1;
-	                    }
-	                    if (!end && sofar + current >= to) {
-	                        portion = (to - sofar) / current;
-	                        end = [
-	                            a[0] + portion * (b[0] - a[0]),
-	                            a[1] + portion * (b[1] - a[1])
-	                        ];
-	                        i1 = i + 1;
-	                    }
-	                    sofar += current;
-	                }
+	        case 'Polygon':
+	        case 'MultiLineString':
+	          c = utilArrayFlatten(c);
+	          break;
+	      }
+	      /* eslint-enable no-fallthrough */
 
-	                var result = points.slice(i0, i1);
-	                result.unshift(start);
-	                result.push(end);
-	                return result;
-	            }
-	        }
 
+	      return utilArrayUnion(coords, c);
+	    }, []);
 
-	        function getAreaLabel(entity, width, height) {
-	            var centroid = path.centroid(entity.asGeoJSON(graph, true));
-	            var extent = entity.extent(graph);
-	            var areaWidth = projection(extent[1])[0] - projection(extent[0])[0];
+	    if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
+	      var extent = geoExtent(d3_geoBounds({
+	        type: 'LineString',
+	        coordinates: coords
+	      }));
+	      map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
+	    }
 
-	            if (isNaN(centroid[0]) || areaWidth < 20) { return; }
+	    return this;
+	  };
 
-	            var preset = _mainPresetIndex.match(entity, context.graph());
-	            var picon = preset && preset.icon;
-	            var iconSize = 17;
-	            var padding = 2;
-	            var p = {};
-
-	            if (picon) {  // icon and label..
-	                if (addIcon()) {
-	                    addLabel(iconSize + padding);
-	                    return p;
-	                }
-	            } else {   // label only..
-	                if (addLabel(0)) {
-	                    return p;
-	                }
-	            }
+	  init();
+	  return drawData;
+	}
 
+	function svgDebug(projection, context) {
+	  function drawDebug(selection) {
+	    var showTile = context.getDebug('tile');
+	    var showCollision = context.getDebug('collision');
+	    var showImagery = context.getDebug('imagery');
+	    var showTouchTargets = context.getDebug('target');
+	    var showDownloaded = context.getDebug('downloaded');
+	    var debugData = [];
 
-	            function addIcon() {
-	                var iconX = centroid[0] - (iconSize / 2);
-	                var iconY = centroid[1] - (iconSize / 2);
-	                var bbox = {
-	                    minX: iconX,
-	                    minY: iconY,
-	                    maxX: iconX + iconSize,
-	                    maxY: iconY + iconSize
-	                };
+	    if (showTile) {
+	      debugData.push({
+	        "class": 'red',
+	        label: 'tile'
+	      });
+	    }
 
-	                if (tryInsert([bbox], entity.id + 'I', true)) {
-	                    p.transform = 'translate(' + iconX + ',' + iconY + ')';
-	                    return true;
-	                }
-	                return false;
-	            }
+	    if (showCollision) {
+	      debugData.push({
+	        "class": 'yellow',
+	        label: 'collision'
+	      });
+	    }
 
-	            function addLabel(yOffset) {
-	                if (width && areaWidth >= width + 20) {
-	                    var labelX = centroid[0];
-	                    var labelY = centroid[1] + yOffset;
-	                    var bbox = {
-	                        minX: labelX - (width / 2) - padding,
-	                        minY: labelY - (height / 2) - padding,
-	                        maxX: labelX + (width / 2) + padding,
-	                        maxY: labelY + (height / 2) + padding
-	                    };
-
-	                    if (tryInsert([bbox], entity.id, true)) {
-	                        p.x = labelX;
-	                        p.y = labelY;
-	                        p.textAnchor = 'middle';
-	                        p.height = height;
-	                        return true;
-	                    }
-	                }
-	                return false;
-	            }
-	        }
+	    if (showImagery) {
+	      debugData.push({
+	        "class": 'orange',
+	        label: 'imagery'
+	      });
+	    }
 
+	    if (showTouchTargets) {
+	      debugData.push({
+	        "class": 'pink',
+	        label: 'touchTargets'
+	      });
+	    }
 
-	        // force insert a singular bounding box
-	        // singular box only, no array, id better be unique
-	        function doInsert(bbox, id) {
-	            bbox.id = id;
+	    if (showDownloaded) {
+	      debugData.push({
+	        "class": 'purple',
+	        label: 'downloaded'
+	      });
+	    }
 
-	            var oldbox = _entitybboxes[id];
-	            if (oldbox) {
-	                _rdrawn.remove(oldbox);
-	            }
-	            _entitybboxes[id] = bbox;
-	            _rdrawn.insert(bbox);
-	        }
+	    var legend = context.container().select('.main-content').selectAll('.debug-legend').data(debugData.length ? [0] : []);
+	    legend.exit().remove();
+	    legend = legend.enter().append('div').attr('class', 'fillD debug-legend').merge(legend);
+	    var legendItems = legend.selectAll('.debug-legend-item').data(debugData, function (d) {
+	      return d.label;
+	    });
+	    legendItems.exit().remove();
+	    legendItems.enter().append('span').attr('class', function (d) {
+	      return "debug-legend-item ".concat(d["class"]);
+	    }).text(function (d) {
+	      return d.label;
+	    });
+	    var layer = selection.selectAll('.layer-debug').data(showImagery || showDownloaded ? [0] : []);
+	    layer.exit().remove();
+	    layer = layer.enter().append('g').attr('class', 'layer-debug').merge(layer); // imagery
 
+	    var extent = context.map().extent();
+	    _mainFileFetcher.get('imagery').then(function (d) {
+	      var hits = showImagery && d.query.bbox(extent.rectangle(), true) || [];
+	      var features = hits.map(function (d) {
+	        return d.features[d.id];
+	      });
+	      var imagery = layer.selectAll('path.debug-imagery').data(features);
+	      imagery.exit().remove();
+	      imagery.enter().append('path').attr('class', 'debug-imagery debug orange');
+	    })["catch"](function () {
+	      /* ignore */
+	    }); // downloaded
 
-	        function tryInsert(bboxes, id, saveSkipped) {
-	            var skipped = false;
+	    var osm = context.connection();
+	    var dataDownloaded = [];
 
-	            for (var i = 0; i < bboxes.length; i++) {
-	                var bbox = bboxes[i];
-	                bbox.id = id;
+	    if (osm && showDownloaded) {
+	      var rtree = osm.caches('get').tile.rtree;
+	      dataDownloaded = rtree.all().map(function (bbox) {
+	        return {
+	          type: 'Feature',
+	          properties: {
+	            id: bbox.id
+	          },
+	          geometry: {
+	            type: 'Polygon',
+	            coordinates: [[[bbox.minX, bbox.minY], [bbox.minX, bbox.maxY], [bbox.maxX, bbox.maxY], [bbox.maxX, bbox.minY], [bbox.minX, bbox.minY]]]
+	          }
+	        };
+	      });
+	    }
 
-	                // Check that label is visible
-	                if (bbox.minX < 0 || bbox.minY < 0 || bbox.maxX > dimensions[0] || bbox.maxY > dimensions[1]) {
-	                    skipped = true;
-	                    break;
-	                }
-	                if (_rdrawn.collides(bbox)) {
-	                    skipped = true;
-	                    break;
-	                }
-	            }
+	    var downloaded = layer.selectAll('path.debug-downloaded').data(showDownloaded ? dataDownloaded : []);
+	    downloaded.exit().remove();
+	    downloaded.enter().append('path').attr('class', 'debug-downloaded debug purple'); // update
 
-	            _entitybboxes[id] = bboxes;
+	    layer.selectAll('path').attr('d', svgPath(projection).geojson);
+	  } // This looks strange because `enabled` methods on other layers are
+	  // chainable getter/setters, and this one is just a getter.
 
-	            if (skipped) {
-	                if (saveSkipped) {
-	                    _rskipped.load(bboxes);
-	                }
-	            } else {
-	                _rdrawn.load(bboxes);
-	            }
 
-	            return !skipped;
-	        }
+	  drawDebug.enabled = function () {
+	    if (!arguments.length) {
+	      return context.getDebug('tile') || context.getDebug('collision') || context.getDebug('imagery') || context.getDebug('target') || context.getDebug('downloaded');
+	    } else {
+	      return this;
+	    }
+	  };
 
+	  return drawDebug;
+	}
 
-	        var layer = selection.selectAll('.layer-osm.labels');
-	        layer.selectAll('.labels-group')
-	            .data(['halo', 'label', 'debug'])
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'labels-group ' + d; });
+	/*
+	    A standalone SVG element that contains only a `defs` sub-element. To be
+	    used once globally, since defs IDs must be unique within a document.
+	*/
 
-	        var halo = layer.selectAll('.labels-group.halo');
-	        var label = layer.selectAll('.labels-group.label');
-	        var debug = layer.selectAll('.labels-group.debug');
+	function svgDefs(context) {
+	  var _defsSelection = select(null);
 
-	        // points
-	        drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
-	        drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point);
+	  var _spritesheetIds = ['iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'community-sprite'];
 
-	        // lines
-	        drawLinePaths(layer, labelled.line, filter, '', positions.line);
-	        drawLineLabels(label, labelled.line, filter, 'linelabel', positions.line);
-	        drawLineLabels(halo, labelled.line, filter, 'linelabel-halo', positions.line);
+	  function drawDefs(selection) {
+	    _defsSelection = selection.append('defs'); // add markers
 
-	        // areas
-	        drawAreaLabels(label, labelled.area, filter, 'arealabel', positions.area);
-	        drawAreaLabels(halo, labelled.area, filter, 'arealabel-halo', positions.area);
-	        drawAreaIcons(label, labelled.area, filter, 'areaicon', positions.area);
-	        drawAreaIcons(halo, labelled.area, filter, 'areaicon-halo', positions.area);
+	    _defsSelection.append('marker').attr('id', 'ideditor-oneway-marker').attr('viewBox', '0 0 10 5').attr('refX', 2.5).attr('refY', 2.5).attr('markerWidth', 2).attr('markerHeight', 2).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'oneway-marker-path').attr('d', 'M 5,3 L 0,3 L 0,2 L 5,2 L 5,0 L 10,2.5 L 5,5 z').attr('stroke', 'none').attr('fill', '#000').attr('opacity', '0.75'); // SVG markers have to be given a colour where they're defined
+	    // (they can't inherit it from the line they're attached to),
+	    // so we need to manually define markers for each color of tag
+	    // (also, it's slightly nicer if we can control the
+	    // positioning for different tags)
 
-	        // debug
-	        drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
-	        drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
 
-	        layer.call(filterLabels);
+	    function addSidedMarker(name, color, offset) {
+	      _defsSelection.append('marker').attr('id', 'ideditor-sided-marker-' + name).attr('viewBox', '0 0 2 2').attr('refX', 1).attr('refY', -offset).attr('markerWidth', 1.5).attr('markerHeight', 1.5).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'sided-marker-path sided-marker-' + name + '-path').attr('d', 'M 0,0 L 1,1 L 2,0 z').attr('stroke', 'none').attr('fill', color);
 	    }
 
+	    addSidedMarker('natural', 'rgb(170, 170, 170)', 0); // for a coastline, the arrows are (somewhat unintuitively) on
+	    // the water side, so let's color them blue (with a gap) to
+	    // give a stronger indication
 
-	    function filterLabels(selection) {
-	        var drawLayer = selection.selectAll('.layer-osm.labels');
-	        var layers = drawLayer.selectAll('.labels-group.halo, .labels-group.label');
+	    addSidedMarker('coastline', '#77dede', 1);
+	    addSidedMarker('waterway', '#77dede', 1); // barriers have a dashed line, and separating the triangle
+	    // from the line visually suits that
 
-	        layers.selectAll('.nolabel')
-	            .classed('nolabel', false);
+	    addSidedMarker('barrier', '#ddd', 1);
+	    addSidedMarker('man_made', '#fff', 0);
 
-	        var mouse = context.map().mouse();
-	        var graph = context.graph();
-	        var selectedIDs = context.selectedIDs();
-	        var ids = [];
-	        var pad, bbox;
-
-	        // hide labels near the mouse
-	        if (mouse) {
-	            pad = 20;
-	            bbox = { minX: mouse[0] - pad, minY: mouse[1] - pad, maxX: mouse[0] + pad, maxY: mouse[1] + pad };
-	            var nearMouse = _rdrawn.search(bbox).map(function(entity) { return entity.id; });
-	            ids.push.apply(ids, nearMouse);
-	        }
-
-	        // hide labels on selected nodes (they look weird when dragging / haloed)
-	        for (var i = 0; i < selectedIDs.length; i++) {
-	            var entity = graph.hasEntity(selectedIDs[i]);
-	            if (entity && entity.type === 'node') {
-	                ids.push(selectedIDs[i]);
-	            }
-	        }
+	    _defsSelection.append('marker').attr('id', 'ideditor-viewfield-marker').attr('viewBox', '0 0 16 16').attr('refX', 8).attr('refY', 16).attr('markerWidth', 4).attr('markerHeight', 4).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'viewfield-marker-path').attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z').attr('fill', '#333').attr('fill-opacity', '0.75').attr('stroke', '#fff').attr('stroke-width', '0.5px').attr('stroke-opacity', '0.75');
 
-	        layers.selectAll(utilEntitySelector(ids))
-	            .classed('nolabel', true);
+	    _defsSelection.append('marker').attr('id', 'ideditor-viewfield-marker-wireframe').attr('viewBox', '0 0 16 16').attr('refX', 8).attr('refY', 16).attr('markerWidth', 4).attr('markerHeight', 4).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'viewfield-marker-path').attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z').attr('fill', 'none').attr('stroke', '#fff').attr('stroke-width', '0.5px').attr('stroke-opacity', '0.75'); // add patterns
 
 
-	        // draw the mouse bbox if debugging is on..
-	        var debug = selection.selectAll('.labels-group.debug');
-	        var gj = [];
-	        if (context.getDebug('collision')) {
-	            gj = bbox ? [{
-	                type: 'Polygon',
-	                coordinates: [[
-	                    [bbox.minX, bbox.minY],
-	                    [bbox.maxX, bbox.minY],
-	                    [bbox.maxX, bbox.maxY],
-	                    [bbox.minX, bbox.maxY],
-	                    [bbox.minX, bbox.minY]
-	                ]]
-	            }] : [];
-	        }
+	    var patterns = _defsSelection.selectAll('pattern').data([// pattern name, pattern image name
+	    ['beach', 'dots'], ['construction', 'construction'], ['cemetery', 'cemetery'], ['cemetery_christian', 'cemetery_christian'], ['cemetery_buddhist', 'cemetery_buddhist'], ['cemetery_muslim', 'cemetery_muslim'], ['cemetery_jewish', 'cemetery_jewish'], ['farmland', 'farmland'], ['farmyard', 'farmyard'], ['forest', 'forest'], ['forest_broadleaved', 'forest_broadleaved'], ['forest_needleleaved', 'forest_needleleaved'], ['forest_leafless', 'forest_leafless'], ['golf_green', 'grass'], ['grass', 'grass'], ['landfill', 'landfill'], ['meadow', 'grass'], ['orchard', 'orchard'], ['pond', 'pond'], ['quarry', 'quarry'], ['scrub', 'bushes'], ['vineyard', 'vineyard'], ['water_standing', 'lines'], ['waves', 'waves'], ['wetland', 'wetland'], ['wetland_marsh', 'wetland_marsh'], ['wetland_swamp', 'wetland_swamp'], ['wetland_bog', 'wetland_bog'], ['wetland_reedbed', 'wetland_reedbed']]).enter().append('pattern').attr('id', function (d) {
+	      return 'ideditor-pattern-' + d[0];
+	    }).attr('width', 32).attr('height', 32).attr('patternUnits', 'userSpaceOnUse');
 
-	        var box = debug.selectAll('.debug-mouse')
-	            .data(gj);
+	    patterns.append('rect').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('class', function (d) {
+	      return 'pattern-color-' + d[0];
+	    });
+	    patterns.append('image').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('xlink:href', function (d) {
+	      return context.imagePath('pattern/' + d[1] + '.png');
+	    }); // add clip paths
 
-	        // exit
-	        box.exit()
-	            .remove();
+	    _defsSelection.selectAll('clipPath').data([12, 18, 20, 32, 45]).enter().append('clipPath').attr('id', function (d) {
+	      return 'ideditor-clip-square-' + d;
+	    }).append('rect').attr('x', 0).attr('y', 0).attr('width', function (d) {
+	      return d;
+	    }).attr('height', function (d) {
+	      return d;
+	    }); // add symbol spritesheets
 
-	        // enter/update
-	        box.enter()
-	            .append('path')
-	            .attr('class', 'debug debug-mouse yellow')
-	            .merge(box)
-	            .attr('d', d3_geoPath());
-	    }
 
+	    addSprites(_spritesheetIds, true);
+	  }
 
-	    var throttleFilterLabels = throttle(filterLabels, 100);
+	  function addSprites(ids, overrideColors) {
+	    _spritesheetIds = utilArrayUniq(_spritesheetIds.concat(ids));
 
+	    var spritesheets = _defsSelection.selectAll('.spritesheet').data(_spritesheetIds);
 
-	    drawLabels.observe = function(selection) {
-	        var listener = function() { throttleFilterLabels(selection); };
-	        selection.on('mousemove.hidelabels', listener);
-	        context.on('enter.hidelabels', listener);
-	    };
+	    spritesheets.enter().append('g').attr('class', function (d) {
+	      return 'spritesheet spritesheet-' + d;
+	    }).each(function (d) {
+	      var url = context.imagePath(d + '.svg');
+	      var node = select(this).node();
+	      svg(url).then(function (svg) {
+	        node.appendChild(select(svg.documentElement).attr('id', 'ideditor-' + d).node());
 
+	        if (overrideColors && d !== 'iD-sprite') {
+	          // allow icon colors to be overridden..
+	          select(node).selectAll('path').attr('fill', 'currentColor');
+	        }
+	      })["catch"](function () {
+	        /* ignore */
+	      });
+	    });
+	    spritesheets.exit().remove();
+	  }
 
-	    drawLabels.off = function(selection) {
-	        throttleFilterLabels.cancel();
-	        selection.on('mousemove.hidelabels', null);
-	        context.on('enter.hidelabels', null);
-	    };
+	  drawDefs.addSprites = addSprites;
+	  return drawDefs;
+	}
 
+	var _layerEnabled$2 = false;
 
-	    return drawLabels;
-	}
+	var _qaService$2;
 
-	var _layerEnabled$1 = false;
-	var _qaService$1;
+	function svgKeepRight(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    return dispatch.call('change');
+	  }, 1000);
 
-	function svgImproveOSM(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () { return dispatch.call('change'); }, 1000);
 	  var minZoom = 12;
-
 	  var touchLayer = select(null);
 	  var drawLayer = select(null);
 	  var layerVisible = false;
 
 	  function markerPath(selection, klass) {
-	    selection
-	      .attr('class', klass)
-	      .attr('transform', 'translate(-10, -28)')
-	      .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-	  }
+	    selection.attr('class', klass).attr('transform', 'translate(-4, -24)').attr('d', 'M11.6,6.2H7.1l1.4-5.1C8.6,0.6,8.1,0,7.5,0H2.2C1.7,0,1.3,0.3,1.3,0.8L0,10.2c-0.1,0.6,0.4,1.1,0.9,1.1h4.6l-1.8,7.6C3.6,19.4,4.1,20,4.7,20c0.3,0,0.6-0.2,0.8-0.5l6.9-11.9C12.7,7,12.3,6.2,11.6,6.2z');
+	  } // Loosely-coupled keepRight service for fetching issues.
+
 
-	  // Loosely-coupled improveOSM service for fetching issues
 	  function getService() {
-	    if (services.improveOSM && !_qaService$1) {
-	      _qaService$1 = services.improveOSM;
-	      _qaService$1.on('loaded', throttledRedraw);
-	    } else if (!services.improveOSM && _qaService$1) {
-	      _qaService$1 = null;
+	    if (services.keepRight && !_qaService$2) {
+	      _qaService$2 = services.keepRight;
+
+	      _qaService$2.on('loaded', throttledRedraw);
+	    } else if (!services.keepRight && _qaService$2) {
+	      _qaService$2 = null;
 	    }
 
-	    return _qaService$1;
-	  }
+	    return _qaService$2;
+	  } // Show the markers
+
 
-	  // Show the markers
 	  function editOn() {
 	    if (!layerVisible) {
 	      layerVisible = true;
-	      drawLayer
-	        .style('display', 'block');
+	      drawLayer.style('display', 'block');
 	    }
-	  }
+	  } // Immediately remove the markers and their touch targets
+
 
-	  // Immediately remove the markers and their touch targets
 	  function editOff() {
 	    if (layerVisible) {
 	      layerVisible = false;
-	      drawLayer
-	        .style('display', 'none');
-	      drawLayer.selectAll('.qaItem.improveOSM')
-	        .remove();
-	      touchLayer.selectAll('.qaItem.improveOSM')
-	        .remove();
+	      drawLayer.style('display', 'none');
+	      drawLayer.selectAll('.qaItem.keepRight').remove();
+	      touchLayer.selectAll('.qaItem.keepRight').remove();
 	    }
-	  }
+	  } // Enable the layer.  This shows the markers and transitions them to visible.
+
 
-	  // Enable the layer.  This shows the markers and transitions them to visible.
 	  function layerOn() {
 	    editOn();
+	    drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+	      return dispatch.call('change');
+	    });
+	  } // Disable the layer.  This transitions the layer invisible and then hides the markers.
 
-	    drawLayer
-	      .style('opacity', 0)
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 1)
-	      .on('end interrupt', function () { return dispatch.call('change'); });
-	  }
 
-	  // Disable the layer.  This transitions the layer invisible and then hides the markers.
 	  function layerOff() {
 	    throttledRedraw.cancel();
 	    drawLayer.interrupt();
-	    touchLayer.selectAll('.qaItem.improveOSM')
-	      .remove();
-
-	    drawLayer
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 0)
-	      .on('end interrupt', function () {
-	        editOff();
-	        dispatch.call('change');
-	      });
-	  }
+	    touchLayer.selectAll('.qaItem.keepRight').remove();
+	    drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+	      editOff();
+	      dispatch.call('change');
+	    });
+	  } // Update the issue markers
 
-	  // Update the issue markers
-	  function updateMarkers() {
-	    if (!layerVisible || !_layerEnabled$1) { return; }
 
+	  function updateMarkers() {
+	    if (!layerVisible || !_layerEnabled$2) return;
 	    var service = getService();
 	    var selectedID = context.selectedErrorID();
-	    var data = (service ? service.getItems(projection) : []);
-	    var getTransform = svgPointTransform(projection);
+	    var data = service ? service.getItems(projection) : [];
+	    var getTransform = svgPointTransform(projection); // Draw markers..
 
-	    // Draw markers..
-	    var markers = drawLayer.selectAll('.qaItem.improveOSM')
-	      .data(data, function (d) { return d.id; });
+	    var markers = drawLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	    // exit
-	    markers.exit()
-	      .remove();
-
-	    // enter
-	    var markersEnter = markers.enter()
-	      .append('g')
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-	    markersEnter
-	      .append('polygon')
-	        .call(markerPath, 'shadow');
-
-	    markersEnter
-	      .append('ellipse')
-	        .attr('cx', 0)
-	        .attr('cy', 0)
-	        .attr('rx', 4.5)
-	        .attr('ry', 2)
-	        .attr('class', 'stroke');
-
-	    markersEnter
-	      .append('polygon')
-	        .attr('fill', 'currentColor')
-	        .call(markerPath, 'qaItem-fill');
-
-	    markersEnter
-	      .append('use')
-	        .attr('transform', 'translate(-6.5, -23)')
-	        .attr('class', 'icon-annotation')
-	        .attr('width', '13px')
-	        .attr('height', '13px')
-	        .attr('xlink:href', function (d) {
-	          var picon = d.icon;
-
-	          if (!picon) {
-	          return '';
-	          } else {
-	          var isMaki = /^maki-/.test(picon);
-	          return ("#" + picon + (isMaki ? '-11' : ''));
-	          }
-	        });
+	    markers.exit().remove(); // enter
 
-	    // update
-	    markers
-	      .merge(markersEnter)
-	      .sort(sortY)
-	        .classed('selected', function (d) { return d.id === selectedID; })
-	        .attr('transform', getTransform);
+	    var markersEnter = markers.enter().append('g').attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.parentIssueType);
+	    });
+	    markersEnter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
+	    markersEnter.append('path').call(markerPath, 'shadow');
+	    markersEnter.append('use').attr('class', 'qaItem-fill').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').attr('xlink:href', '#iD-icon-bolt'); // update
 
+	    markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+	      return d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
 
-	    // Draw targets..
-	    if (touchLayer.empty()) { return; }
+	    if (touchLayer.empty()) return;
 	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var targets = touchLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
+	      return d.id;
+	    }); // exit
+
+	    targets.exit().remove(); // enter/update
 
-	    var targets = touchLayer.selectAll('.qaItem.improveOSM')
-	      .data(data, function (d) { return d.id; });
-
-	    // exit
-	    targets.exit()
-	      .remove();
-
-	    // enter/update
-	    targets.enter()
-	      .append('rect')
-	        .attr('width', '20px')
-	        .attr('height', '30px')
-	        .attr('x', '-10px')
-	        .attr('y', '-28px')
-	      .merge(targets)
-	      .sort(sortY)
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " target " + fillClass + " itemId-" + (d.id)); })
-	        .attr('transform', getTransform);
+	    targets.enter().append('rect').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').merge(targets).sort(sortY).attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+	    }).attr('transform', getTransform);
 
 	    function sortY(a, b) {
-	      return (a.id === selectedID) ? 1
-	        : (b.id === selectedID) ? -1
-	        : b.loc[1] - a.loc[1];
+	      return a.id === selectedID ? 1 : b.id === selectedID ? -1 : a.severity === 'error' && b.severity !== 'error' ? 1 : b.severity === 'error' && a.severity !== 'error' ? -1 : b.loc[1] - a.loc[1];
 	    }
-	  }
+	  } // Draw the keepRight layer and schedule loading issues and updating markers.
 
-	  // Draw the ImproveOSM layer and schedule loading issues and updating markers.
-	  function drawImproveOSM(selection) {
-	    var service = getService();
 
+	  function drawKeepRight(selection) {
+	    var service = getService();
 	    var surface = context.surface();
+
 	    if (surface && !surface.empty()) {
 	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
 	    }
 
-	    drawLayer = selection.selectAll('.layer-improveOSM')
-	      .data(service ? [0] : []);
+	    drawLayer = selection.selectAll('.layer-keepRight').data(service ? [0] : []);
+	    drawLayer.exit().remove();
+	    drawLayer = drawLayer.enter().append('g').attr('class', 'layer-keepRight').style('display', _layerEnabled$2 ? 'block' : 'none').merge(drawLayer);
 
-	    drawLayer.exit()
-	      .remove();
-
-	    drawLayer = drawLayer.enter()
-	      .append('g')
-	        .attr('class', 'layer-improveOSM')
-	        .style('display', _layerEnabled$1 ? 'block' : 'none')
-	      .merge(drawLayer);
-
-	    if (_layerEnabled$1) {
+	    if (_layerEnabled$2) {
 	      if (service && ~~context.map().zoom() >= minZoom) {
 	        editOn();
 	        service.loadIssues(projection);
@@ -69610,17 +83254,18 @@
 	        editOff();
 	      }
 	    }
-	  }
+	  } // Toggles the layer on and off
 
-	  // Toggles the layer on and off
-	  drawImproveOSM.enabled = function(val) {
-	    if (!arguments.length) { return _layerEnabled$1; }
 
-	    _layerEnabled$1 = val;
-	    if (_layerEnabled$1) {
+	  drawKeepRight.enabled = function (val) {
+	    if (!arguments.length) return _layerEnabled$2;
+	    _layerEnabled$2 = val;
+
+	    if (_layerEnabled$2) {
 	      layerOn();
 	    } else {
 	      layerOff();
+
 	      if (context.selectedErrorID()) {
 	        context.enter(modeBrowse(context));
 	      }
@@ -69630,48927 +83275,40105 @@
 	    return this;
 	  };
 
-	  drawImproveOSM.supported = function () { return !!getService(); };
+	  drawKeepRight.supported = function () {
+	    return !!getService();
+	  };
 
-	  return drawImproveOSM;
+	  return drawKeepRight;
 	}
 
-	var _layerEnabled$2 = false;
-	var _qaService$2;
-
-	function svgOsmose(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () { return dispatch.call('change'); }, 1000);
-	  var minZoom = 12;
-
-	  var touchLayer = select(null);
-	  var drawLayer = select(null);
-	  var layerVisible = false;
+	function svgGeolocate(projection) {
+	  var layer = select(null);
 
-	  function markerPath(selection, klass) {
-	    selection
-	      .attr('class', klass)
-	      .attr('transform', 'translate(-10, -28)')
-	      .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-	  }
+	  var _position;
 
-	  // Loosely-coupled osmose service for fetching issues
-	  function getService() {
-	    if (services.osmose && !_qaService$2) {
-	      _qaService$2 = services.osmose;
-	      _qaService$2.on('loaded', throttledRedraw);
-	    } else if (!services.osmose && _qaService$2) {
-	      _qaService$2 = null;
-	    }
+	  function init() {
+	    if (svgGeolocate.initialized) return; // run once
 
-	    return _qaService$2;
+	    svgGeolocate.enabled = false;
+	    svgGeolocate.initialized = true;
 	  }
 
-	  // Show the markers
-	  function editOn() {
-	    if (!layerVisible) {
-	      layerVisible = true;
-	      drawLayer
-	        .style('display', 'block');
-	    }
+	  function showLayer() {
+	    layer.style('display', 'block');
 	  }
 
-	  // Immediately remove the markers and their touch targets
-	  function editOff() {
-	    if (layerVisible) {
-	      layerVisible = false;
-	      drawLayer
-	        .style('display', 'none');
-	      drawLayer.selectAll('.qaItem.osmose')
-	        .remove();
-	      touchLayer.selectAll('.qaItem.osmose')
-	        .remove();
-	    }
+	  function hideLayer() {
+	    layer.transition().duration(250).style('opacity', 0);
 	  }
 
-	  // Enable the layer.  This shows the markers and transitions them to visible.
 	  function layerOn() {
-	    editOn();
-
-	    drawLayer
-	      .style('opacity', 0)
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 1)
-	      .on('end interrupt', function () { return dispatch.call('change'); });
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1);
 	  }
 
-	  // Disable the layer.  This transitions the layer invisible and then hides the markers.
 	  function layerOff() {
-	    throttledRedraw.cancel();
-	    drawLayer.interrupt();
-	    touchLayer.selectAll('.qaItem.osmose')
-	      .remove();
-
-	    drawLayer
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 0)
-	      .on('end interrupt', function () {
-	        editOff();
-	        dispatch.call('change');
-	      });
+	    layer.style('display', 'none');
 	  }
 
-	  // Update the issue markers
-	  function updateMarkers() {
-	    if (!layerVisible || !_layerEnabled$2) { return; }
-
-	    var service = getService();
-	    var selectedID = context.selectedErrorID();
-	    var data = (service ? service.getItems(projection) : []);
-	    var getTransform = svgPointTransform(projection);
-
-	    // Draw markers..
-	    var markers = drawLayer.selectAll('.qaItem.osmose')
-	      .data(data, function (d) { return d.id; });
-
-	    // exit
-	    markers.exit()
-	      .remove();
-
-	    // enter
-	    var markersEnter = markers.enter()
-	      .append('g')
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-	    markersEnter
-	      .append('polygon')
-	        .call(markerPath, 'shadow');
-
-	    markersEnter
-	      .append('ellipse')
-	        .attr('cx', 0)
-	        .attr('cy', 0)
-	        .attr('rx', 4.5)
-	        .attr('ry', 2)
-	        .attr('class', 'stroke');
-
-	    markersEnter
-	      .append('polygon')
-	        .attr('fill', function (d) { return service.getColor(d.item); })
-	        .call(markerPath, 'qaItem-fill');
-
-	    markersEnter
-	      .append('use')
-	        .attr('transform', 'translate(-6.5, -23)')
-	        .attr('class', 'icon-annotation')
-	        .attr('width', '13px')
-	        .attr('height', '13px')
-	        .attr('xlink:href', function (d) {
-	          var picon = d.icon;
-
-	          if (!picon) {
-	            return '';
-	          } else {
-	            var isMaki = /^maki-/.test(picon);
-	            return ("#" + picon + (isMaki ? '-11' : ''));
-	          }
-	        });
-
-	    // update
-	    markers
-	      .merge(markersEnter)
-	      .sort(sortY)
-	        .classed('selected', function (d) { return d.id === selectedID; })
-	        .attr('transform', getTransform);
-
-	    // Draw targets..
-	    if (touchLayer.empty()) { return; }
-	    var fillClass = context.getDebug('target') ? 'pink' : 'nocolor';
-
-	    var targets = touchLayer.selectAll('.qaItem.osmose')
-	      .data(data, function (d) { return d.id; });
-
-	    // exit
-	    targets.exit()
-	      .remove();
-
-	    // enter/update
-	    targets.enter()
-	      .append('rect')
-	        .attr('width', '20px')
-	        .attr('height', '30px')
-	        .attr('x', '-10px')
-	        .attr('y', '-28px')
-	      .merge(targets)
-	      .sort(sortY)
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " target " + fillClass + " itemId-" + (d.id)); })
-	        .attr('transform', getTransform);
-
-	    function sortY(a, b) {
-	      return (a.id === selectedID) ? 1
-	        : (b.id === selectedID) ? -1
-	        : b.loc[1] - a.loc[1];
-	    }
+	  function transform(d) {
+	    return svgPointTransform(projection)(d);
 	  }
 
-	  // Draw the Osmose layer and schedule loading issues and updating markers.
-	  function drawOsmose(selection) {
-	    var service = getService();
-
-	    var surface = context.surface();
-	    if (surface && !surface.empty()) {
-	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-	    }
-
-	    drawLayer = selection.selectAll('.layer-osmose')
-	      .data(service ? [0] : []);
-
-	    drawLayer.exit()
-	      .remove();
-
-	    drawLayer = drawLayer.enter()
-	      .append('g')
-	        .attr('class', 'layer-osmose')
-	        .style('display', _layerEnabled$2 ? 'block' : 'none')
-	      .merge(drawLayer);
+	  function accuracy(accuracy, loc) {
+	    // converts accuracy to pixels...
+	    var degreesRadius = geoMetersToLat(accuracy),
+	        tangentLoc = [loc[0], loc[1] + degreesRadius],
+	        projectedTangent = projection(tangentLoc),
+	        projectedLoc = projection([loc[0], loc[1]]); // southern most point will have higher pixel value...
 
-	    if (_layerEnabled$2) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        service.loadIssues(projection);
-	        updateMarkers();
-	      } else {
-	        editOff();
-	      }
-	    }
+	    return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
 	  }
 
-	  // Toggles the layer on and off
-	  drawOsmose.enabled = function(val) {
-	    if (!arguments.length) { return _layerEnabled$2; }
-
-	    _layerEnabled$2 = val;
-	    if (_layerEnabled$2) {
-	      // Strings supplied by Osmose fetched before showing layer for first time
-	      // NOTE: Currently no way to change locale in iD at runtime, would need to re-call this method if that's ever implemented
-	      // Also, If layer is toggled quickly multiple requests are sent
-	      getService().loadStrings()
-	        .then(layerOn)
-	        .catch(function (err) {
-	          console.log(err); // eslint-disable-line no-console
-	        });
+	  function update() {
+	    var geolocation = {
+	      loc: [_position.coords.longitude, _position.coords.latitude]
+	    };
+	    var groups = layer.selectAll('.geolocations').selectAll('.geolocation').data([geolocation]);
+	    groups.exit().remove();
+	    var pointsEnter = groups.enter().append('g').attr('class', 'geolocation');
+	    pointsEnter.append('circle').attr('class', 'geolocate-radius').attr('dx', '0').attr('dy', '0').attr('fill', 'rgb(15,128,225)').attr('fill-opacity', '0.3').attr('r', '0');
+	    pointsEnter.append('circle').attr('dx', '0').attr('dy', '0').attr('fill', 'rgb(15,128,225)').attr('stroke', 'white').attr('stroke-width', '1.5').attr('r', '6');
+	    groups.merge(pointsEnter).attr('transform', transform);
+	    layer.select('.geolocate-radius').attr('r', accuracy(_position.coords.accuracy, geolocation.loc));
+	  }
+
+	  function drawLocation(selection) {
+	    var enabled = svgGeolocate.enabled;
+	    layer = selection.selectAll('.layer-geolocate').data([0]);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-geolocate').style('display', enabled ? 'block' : 'none');
+	    layerEnter.append('g').attr('class', 'geolocations');
+	    layer = layerEnter.merge(layer);
+
+	    if (enabled) {
+	      update();
 	    } else {
 	      layerOff();
-	      if (context.selectedErrorID()) {
-	        context.enter(modeBrowse(context));
-	      }
+	    }
+	  }
+
+	  drawLocation.enabled = function (position, enabled) {
+	    if (!arguments.length) return svgGeolocate.enabled;
+	    _position = position;
+	    svgGeolocate.enabled = enabled;
+
+	    if (svgGeolocate.enabled) {
+	      showLayer();
+	      layerOn();
+	    } else {
+	      hideLayer();
 	    }
 
-	    dispatch.call('change');
 	    return this;
 	  };
 
-	  drawOsmose.supported = function () { return !!getService(); };
-
-	  return drawOsmose;
+	  init();
+	  return drawLocation;
 	}
 
-	function svgStreetside(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 14;
-	    var minMarkerZoom = 16;
-	    var minViewfieldZoom = 18;
-	    var layer = select(null);
-	    var _viewerYaw = 0;
-	    var _selectedSequence = null;
-	    var _streetside;
+	function svgLabels(projection, context) {
+	  var path = d3_geoPath(projection);
+	  var detected = utilDetect();
+	  var baselineHack = detected.ie || detected.browser.toLowerCase() === 'edge' || detected.browser.toLowerCase() === 'firefox' && detected.version >= 70;
 
-	    /**
-	     * init().
-	     */
-	    function init() {
-	        if (svgStreetside.initialized) { return; }  // run once
-	        svgStreetside.enabled = false;
-	        svgStreetside.initialized = true;
-	    }
+	  var _rdrawn = new RBush();
 
-	    /**
-	     * getService().
-	     */
-	    function getService() {
-	        if (services.streetside && !_streetside) {
-	            _streetside = services.streetside;
-	            _streetside.event
-	                .on('viewerChanged.svgStreetside', viewerChanged)
-	                .on('loadedBubbles.svgStreetside', throttledRedraw);
-	        } else if (!services.streetside && _streetside) {
-	            _streetside = null;
-	        }
+	  var _rskipped = new RBush();
 
-	        return _streetside;
-	    }
+	  var _textWidthCache = {};
+	  var _entitybboxes = {}; // Listed from highest to lowest priority
 
-	    /**
-	     * showLayer().
-	     */
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	  var labelStack = [['line', 'aeroway', '*', 12], ['line', 'highway', 'motorway', 12], ['line', 'highway', 'trunk', 12], ['line', 'highway', 'primary', 12], ['line', 'highway', 'secondary', 12], ['line', 'highway', 'tertiary', 12], ['line', 'highway', '*', 12], ['line', 'railway', '*', 12], ['line', 'waterway', '*', 12], ['area', 'aeroway', '*', 12], ['area', 'amenity', '*', 12], ['area', 'building', '*', 12], ['area', 'historic', '*', 12], ['area', 'leisure', '*', 12], ['area', 'man_made', '*', 12], ['area', 'natural', '*', 12], ['area', 'shop', '*', 12], ['area', 'tourism', '*', 12], ['area', 'camp_site', '*', 12], ['point', 'aeroway', '*', 10], ['point', 'amenity', '*', 10], ['point', 'building', '*', 10], ['point', 'historic', '*', 10], ['point', 'leisure', '*', 10], ['point', 'man_made', '*', 10], ['point', 'natural', '*', 10], ['point', 'shop', '*', 10], ['point', 'tourism', '*', 10], ['point', 'camp_site', '*', 10], ['line', 'name', '*', 12], ['area', 'name', '*', 12], ['point', 'name', '*', 10]];
 
-	        editOn();
+	  function shouldSkipIcon(preset) {
+	    var noIcons = ['building', 'landuse', 'natural'];
+	    return noIcons.some(function (s) {
+	      return preset.id.indexOf(s) >= 0;
+	    });
+	  }
 
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
-	    }
+	  function get(array, prop) {
+	    return function (d, i) {
+	      return array[i][prop];
+	    };
+	  }
 
-	    /**
-	     * hideLayer().
-	     */
-	    function hideLayer() {
-	        throttledRedraw.cancel();
+	  function textWidth(text, size, elem) {
+	    var c = _textWidthCache[size];
+	    if (!c) c = _textWidthCache[size] = {};
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', editOff);
-	    }
+	    if (c[text]) {
+	      return c[text];
+	    } else if (elem) {
+	      c[text] = elem.getComputedTextLength();
+	      return c[text];
+	    } else {
+	      var str = encodeURIComponent(text).match(/%[CDEFcdef]/g);
 
-	    /**
-	     * editOn().
-	     */
-	    function editOn() {
-	        layer.style('display', 'block');
+	      if (str === null) {
+	        return size / 3 * 2 * text.length;
+	      } else {
+	        return size / 3 * (2 * text.length + str.length);
+	      }
 	    }
+	  }
 
-	    /**
-	     * editOff().
-	     */
-	    function editOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
-	    }
+	  function drawLinePaths(selection, entities, filter, classes, labels) {
+	    var paths = selection.selectAll('path').filter(filter).data(entities, osmEntity.key); // exit
 
-	    /**
-	     * click() Handles 'bubble' point click event.
-	     */
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
+	    paths.exit().remove(); // enter/update
 
-	        // try to preserve the viewer rotation when staying on the same sequence
-	        if (d.sequenceKey !== _selectedSequence) {
-	            _viewerYaw = 0;  // reset
-	        }
-	        _selectedSequence = d.sequenceKey;
+	    paths.enter().append('path').style('stroke-width', get(labels, 'font-size')).attr('id', function (d) {
+	      return 'ideditor-labelpath-' + d.id;
+	    }).attr('class', classes).merge(paths).attr('d', get(labels, 'lineString'));
+	  }
 
-	        service
-	            .selectImage(context, d)
-	            .then(function (response) {
-	                if (response.status === 'ok'){
-	                    service.showViewer(context, _viewerYaw);
-	                }
-	            });
+	  function drawLineLabels(selection, entities, filter, classes, labels) {
+	    var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
+	    texts.exit().remove(); // enter
 
-	        context.map().centerEase(d.loc);
-	    }
+	    texts.enter().append('text').attr('class', function (d, i) {
+	      return classes + ' ' + labels[i].classes + ' ' + d.id;
+	    }).attr('dy', baselineHack ? '0.35em' : null).append('textPath').attr('class', 'textpath'); // update
 
-	    /**
-	     * mouseover().
-	     */
-	    function mouseover(d) {
-	        var service = getService();
-	        if (service) { service.setStyles(context, d); }
-	    }
+	    selection.selectAll('text.' + classes).selectAll('.textpath').filter(filter).data(entities, osmEntity.key).attr('startOffset', '50%').attr('xlink:href', function (d) {
+	      return '#ideditor-labelpath-' + d.id;
+	    }).text(utilDisplayNameForPath);
+	  }
 
-	    /**
-	     * mouseout().
-	     */
-	    function mouseout() {
-	        var service = getService();
-	        if (service) { service.setStyles(context, null); }
-	    }
+	  function drawPointLabels(selection, entities, filter, classes, labels) {
+	    var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-	    /**
-	     * transform().
-	     */
-	    function transform(d) {
-	        var t = svgPointTransform(projection)(d);
-	        var rot = d.ca + _viewerYaw;
-	        if (rot) {
-	            t += ' rotate(' + Math.floor(rot) + ',0,0)';
-	        }
-	        return t;
+	    texts.exit().remove(); // enter/update
+
+	    texts.enter().append('text').attr('class', function (d, i) {
+	      return classes + ' ' + labels[i].classes + ' ' + d.id;
+	    }).merge(texts).attr('x', get(labels, 'x')).attr('y', get(labels, 'y')).style('text-anchor', get(labels, 'textAnchor')).text(utilDisplayName).each(function (d, i) {
+	      textWidth(utilDisplayName(d), labels[i].height, this);
+	    });
+	  }
+
+	  function drawAreaLabels(selection, entities, filter, classes, labels) {
+	    entities = entities.filter(hasText);
+	    labels = labels.filter(hasText);
+	    drawPointLabels(selection, entities, filter, classes, labels);
+
+	    function hasText(d, i) {
+	      return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
 	    }
+	  }
 
+	  function drawAreaIcons(selection, entities, filter, classes, labels) {
+	    var icons = selection.selectAll('use.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-	    function viewerChanged() {
-	        var service = getService();
-	        if (!service) { return; }
+	    icons.exit().remove(); // enter/update
 
-	        var viewer = service.viewer();
-	        if (!viewer) { return; }
+	    icons.enter().append('use').attr('class', 'icon ' + classes).attr('width', '17px').attr('height', '17px').merge(icons).attr('transform', get(labels, 'transform')).attr('xlink:href', function (d) {
+	      var preset = _mainPresetIndex.match(d, context.graph());
+	      var picon = preset && preset.icon;
 
-	        // update viewfield rotation
-	        _viewerYaw = viewer.getYaw();
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return '#' + picon + (isMaki ? '-15' : '');
+	      }
+	    });
+	  }
 
-	        // avoid updating if the map is currently transformed
-	        // e.g. during drags or easing.
-	        if (context.map().isTransformed()) { return; }
+	  function drawCollisionBoxes(selection, rtree, which) {
+	    var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
+	    var gj = [];
 
-	        layer.selectAll('.viewfield-group.currentView')
-	            .attr('transform', transform);
+	    if (context.getDebug('collision')) {
+	      gj = rtree.all().map(function (d) {
+	        return {
+	          type: 'Polygon',
+	          coordinates: [[[d.minX, d.minY], [d.maxX, d.minY], [d.maxX, d.maxY], [d.minX, d.maxY], [d.minX, d.minY]]]
+	        };
+	      });
 	    }
 
+	    var boxes = selection.selectAll('.' + which).data(gj); // exit
 
-	    context.photos().on('change.streetside', update);
-
-	    /**
-	     * update().
-	     */
-	    function update() {
-	        var viewer = context.container().select('.photoviewer');
-	        var selected = viewer.empty() ? undefined : viewer.datum();
-	        var z = ~~context.map().zoom();
-	        var showMarkers = (z >= minMarkerZoom);
-	        var showViewfields = (z >= minViewfieldZoom);
-	        var service = getService();
+	    boxes.exit().remove(); // enter/update
 
-	        var sequences = [];
-	        var bubbles = [];
+	    boxes.enter().append('path').attr('class', classes).merge(boxes).attr('d', d3_geoPath());
+	  }
 
-	        if (context.photos().showsPanoramic()) {
-	            sequences = (service ? service.sequences(projection) : []);
-	            bubbles = (service && showMarkers ? service.bubbles(projection) : []);
-	        }
+	  function drawLabels(selection, graph, entities, filter, dimensions, fullRedraw) {
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    var labelable = [];
+	    var renderNodeAs = {};
+	    var i, j, k, entity, geometry;
 
-	        var traces = layer.selectAll('.sequences').selectAll('.sequence')
-	            .data(sequences, function(d) { return d.properties.key; });
+	    for (i = 0; i < labelStack.length; i++) {
+	      labelable.push([]);
+	    }
 
-	        // exit
-	        traces.exit()
-	            .remove();
+	    if (fullRedraw) {
+	      _rdrawn.clear();
 
-	        // enter/update
-	        traces = traces.enter()
-	            .append('path')
-	            .attr('class', 'sequence')
-	            .merge(traces)
-	            .attr('d', svgPath(projection).geojson);
+	      _rskipped.clear();
 
+	      _entitybboxes = {};
+	    } else {
+	      for (i = 0; i < entities.length; i++) {
+	        entity = entities[i];
+	        var toRemove = [].concat(_entitybboxes[entity.id] || []).concat(_entitybboxes[entity.id + 'I'] || []);
 
-	        var groups = layer.selectAll('.markers').selectAll('.viewfield-group')
-	            .data(bubbles, function(d) {
-	                // force reenter once bubbles are attached to a sequence
-	                return d.key + (d.sequenceKey ? 'v1' : 'v0');
-	            });
+	        for (j = 0; j < toRemove.length; j++) {
+	          _rdrawn.remove(toRemove[j]);
 
-	        // exit
-	        groups.exit()
-	            .remove();
-
-	        // enter
-	        var groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', 'viewfield-group')
-	            .on('mouseenter', mouseover)
-	            .on('mouseleave', mouseout)
-	            .on('click', click);
-
-	        groupsEnter
-	            .append('g')
-	            .attr('class', 'viewfield-scale');
-
-	        // update
-	        var markers = groups
-	            .merge(groupsEnter)
-	            .sort(function(a, b) {
-	                return (a === selected) ? 1
-	                    : (b === selected) ? -1
-	                    : b.loc[1] - a.loc[1];
-	            })
-	            .attr('transform', transform)
-	            .select('.viewfield-scale');
-
-
-	        markers.selectAll('circle')
-	            .data([0])
-	            .enter()
-	            .append('circle')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('r', '6');
-
-	        var viewfields = markers.selectAll('.viewfield')
-	            .data(showViewfields ? [0] : []);
-
-	        viewfields.exit()
-	            .remove();
-
-	        // viewfields may or may not be drawn...
-	        // but if they are, draw below the circles
-	        viewfields.enter()
-	            .insert('path', 'circle')
-	            .attr('class', 'viewfield')
-	            .attr('transform', 'scale(1.5,1.5),translate(-8, -13)')
-	            .attr('d', viewfieldPath);
-
-	        function viewfieldPath() {
-	            var d = this.parentNode.__data__;
-	            if (d.pano) {
-	                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-	            } else {
-	                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-	            }
+	          _rskipped.remove(toRemove[j]);
 	        }
+	      }
+	    } // Loop through all the entities to do some preprocessing
 
-	    }
 
-	    /**
-	     * drawImages()
-	     * drawImages is the method that is returned (and that runs) everytime 'svgStreetside()' is called.
-	     * 'svgStreetside()' is called from index.js
-	     */
-	    function drawImages(selection) {
-	        var enabled = svgStreetside.enabled;
-	        var service = getService();
+	    for (i = 0; i < entities.length; i++) {
+	      entity = entities[i];
+	      geometry = entity.geometry(graph); // Insert collision boxes around interesting points/vertices
 
-	        layer = selection.selectAll('.layer-streetside-images')
-	            .data(service ? [0] : []);
+	      if (geometry === 'point' || geometry === 'vertex' && isInterestingVertex(entity)) {
+	        var hasDirections = entity.directions(graph, projection).length;
+	        var markerPadding;
 
-	        layer.exit()
-	            .remove();
+	        if (!wireframe && geometry === 'point' && !(zoom >= 18 && hasDirections)) {
+	          renderNodeAs[entity.id] = 'point';
+	          markerPadding = 20; // extra y for marker height
+	        } else {
+	          renderNodeAs[entity.id] = 'vertex';
+	          markerPadding = 0;
+	        }
 
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-streetside-images')
-	            .style('display', enabled ? 'block' : 'none');
+	        var coord = projection(entity.loc);
+	        var nodePadding = 10;
+	        var bbox = {
+	          minX: coord[0] - nodePadding,
+	          minY: coord[1] - nodePadding - markerPadding,
+	          maxX: coord[0] + nodePadding,
+	          maxY: coord[1] + nodePadding
+	        };
+	        doInsert(bbox, entity.id + 'P');
+	      } // From here on, treat vertices like points
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'sequences');
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'markers');
+	      if (geometry === 'vertex') {
+	        geometry = 'point';
+	      } // Determine which entities are label-able
 
-	        layer = layerEnter
-	            .merge(layer);
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadBubbles(projection);
-	            } else {
-	                editOff();
-	            }
-	        }
-	    }
+	      var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
+	      var icon = preset && !shouldSkipIcon(preset) && preset.icon;
+	      if (!icon && !utilDisplayName(entity)) continue;
 
+	      for (k = 0; k < labelStack.length; k++) {
+	        var matchGeom = labelStack[k][0];
+	        var matchKey = labelStack[k][1];
+	        var matchVal = labelStack[k][2];
+	        var hasVal = entity.tags[matchKey];
 
-	    /**
-	     * drawImages.enabled().
-	     */
-	    drawImages.enabled = function(_) {
-	        if (!arguments.length) { return svgStreetside.enabled; }
-	        svgStreetside.enabled = _;
-	        if (svgStreetside.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
+	        if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
+	          labelable[k].push(entity);
+	          break;
 	        }
-	        dispatch.call('change');
-	        return this;
-	    };
+	      }
+	    }
 
-	    /**
-	     * drawImages.supported().
-	     */
-	    drawImages.supported = function() {
-	        return !!getService();
+	    var positions = {
+	      point: [],
+	      line: [],
+	      area: []
 	    };
+	    var labelled = {
+	      point: [],
+	      line: [],
+	      area: []
+	    }; // Try and find a valid label for labellable entities
 
-	    init();
+	    for (k = 0; k < labelable.length; k++) {
+	      var fontSize = labelStack[k][3];
 
-	    return drawImages;
-	}
+	      for (i = 0; i < labelable[k].length; i++) {
+	        entity = labelable[k][i];
+	        geometry = entity.geometry(graph);
+	        var getName = geometry === 'line' ? utilDisplayNameForPath : utilDisplayName;
+	        var name = getName(entity);
+	        var width = name && textWidth(name, fontSize);
+	        var p = null;
 
-	function svgMapillaryImages(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var minMarkerZoom = 16;
-	    var minViewfieldZoom = 18;
-	    var layer = select(null);
-	    var _mapillary;
-	    var viewerCompassAngle;
-
-
-	    function init() {
-	        if (svgMapillaryImages.initialized) { return; }  // run once
-	        svgMapillaryImages.enabled = false;
-	        svgMapillaryImages.initialized = true;
-	    }
-
-
-	    function getService() {
-	        if (services.mapillary && !_mapillary) {
-	            _mapillary = services.mapillary;
-	            _mapillary.event.on('loadedImages', throttledRedraw);
-	            _mapillary.event.on('bearingChanged', function(e) {
-	                viewerCompassAngle = e;
-
-	                // avoid updating if the map is currently transformed
-	                // e.g. during drags or easing.
-	                if (context.map().isTransformed()) { return; }
-
-	                layer.selectAll('.viewfield-group.currentView')
-	                    .filter(function(d) {
-	                        return d.pano;
-	                    })
-	                    .attr('transform', transform);
-	            });
-	        } else if (!services.mapillary && _mapillary) {
-	            _mapillary = null;
+	        if (geometry === 'point' || geometry === 'vertex') {
+	          // no point or vertex labels in wireframe mode
+	          // no vertex labels at low zooms (vertices have no icons)
+	          if (wireframe) continue;
+	          var renderAs = renderNodeAs[entity.id];
+	          if (renderAs === 'vertex' && zoom < 17) continue;
+	          p = getPointLabel(entity, width, fontSize, renderAs);
+	        } else if (geometry === 'line') {
+	          p = getLineLabel(entity, width, fontSize);
+	        } else if (geometry === 'area') {
+	          p = getAreaLabel(entity, width, fontSize);
 	        }
 
-	        return _mapillary;
-	    }
+	        if (p) {
+	          if (geometry === 'vertex') {
+	            geometry = 'point';
+	          } // treat vertex like point
 
 
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	          p.classes = geometry + ' tag-' + labelStack[k][1];
+	          positions[geometry].push(p);
+	          labelled[geometry].push(entity);
+	        }
+	      }
+	    }
 
-	        editOn();
+	    function isInterestingVertex(entity) {
+	      var selectedIDs = context.selectedIDs();
+	      return entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || selectedIDs.indexOf(entity.id) !== -1 || graph.parentWays(entity).some(function (parent) {
+	        return selectedIDs.indexOf(parent.id) !== -1;
+	      });
+	    }
+
+	    function getPointLabel(entity, width, height, geometry) {
+	      var y = geometry === 'point' ? -12 : 0;
+	      var pointOffsets = {
+	        ltr: [15, y, 'start'],
+	        rtl: [-15, y, 'end']
+	      };
+	      var textDirection = _mainLocalizer.textDirection();
+	      var coord = projection(entity.loc);
+	      var textPadding = 2;
+	      var offset = pointOffsets[textDirection];
+	      var p = {
+	        height: height,
+	        width: width,
+	        x: coord[0] + offset[0],
+	        y: coord[1] + offset[1],
+	        textAnchor: offset[2]
+	      }; // insert a collision box for the text label..
+
+	      var bbox;
+
+	      if (textDirection === 'rtl') {
+	        bbox = {
+	          minX: p.x - width - textPadding,
+	          minY: p.y - height / 2 - textPadding,
+	          maxX: p.x + textPadding,
+	          maxY: p.y + height / 2 + textPadding
+	        };
+	      } else {
+	        bbox = {
+	          minX: p.x - textPadding,
+	          minY: p.y - height / 2 - textPadding,
+	          maxX: p.x + width + textPadding,
+	          maxY: p.y + height / 2 + textPadding
+	        };
+	      }
 
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
+	      if (tryInsert([bbox], entity.id, true)) {
+	        return p;
+	      }
 	    }
 
+	    function getLineLabel(entity, width, height) {
+	      var viewport = geoExtent(context.projection.clipExtent()).polygon();
+	      var points = graph.childNodes(entity).map(function (node) {
+	        return projection(node.loc);
+	      });
+	      var length = geoPathLength(points);
+	      if (length < width + 20) return; // % along the line to attempt to place the label
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
+	      var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70, 25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
+	      var padding = 3;
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', editOff);
-	    }
+	      for (var i = 0; i < lineOffsets.length; i++) {
+	        var offset = lineOffsets[i];
+	        var middle = offset / 100 * length;
+	        var start = middle - width / 2;
+	        if (start < 0 || start + width > length) continue; // generate subpath and ignore paths that are invalid or don't cross viewport.
 
+	        var sub = subpath(points, start, start + width);
 
-	    function editOn() {
-	        layer.style('display', 'block');
-	    }
+	        if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
+	          continue;
+	        }
 
+	        var isReverse = reverse(sub);
 
-	    function editOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
-	    }
+	        if (isReverse) {
+	          sub = sub.reverse();
+	        }
 
+	        var bboxes = [];
+	        var boxsize = (height + 2) / 2;
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
+	        for (var j = 0; j < sub.length - 1; j++) {
+	          var a = sub[j];
+	          var b = sub[j + 1]; // split up the text into small collision boxes
 
-	        service
-	            .selectImage(context, d.key)
-	            .updateViewer(context, d.key)
-	            .showViewer(context);
+	          var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));
 
-	        context.map().centerEase(d.loc);
-	    }
+	          for (var box = 0; box < num; box++) {
+	            var p = geoVecInterp(a, b, box / num);
+	            var x0 = p[0] - boxsize - padding;
+	            var y0 = p[1] - boxsize - padding;
+	            var x1 = p[0] + boxsize + padding;
+	            var y1 = p[1] + boxsize + padding;
+	            bboxes.push({
+	              minX: Math.min(x0, x1),
+	              minY: Math.min(y0, y1),
+	              maxX: Math.max(x0, x1),
+	              maxY: Math.max(y0, y1)
+	            });
+	          }
+	        }
 
+	        if (tryInsert(bboxes, entity.id, false)) {
+	          // accept this one
+	          return {
+	            'font-size': height + 2,
+	            lineString: lineString(sub),
+	            startOffset: offset + '%'
+	          };
+	        }
+	      }
 
-	    function mouseover(d) {
-	        var service = getService();
-	        if (service) { service.setStyles(context, d); }
-	    }
+	      function reverse(p) {
+	        var angle = Math.atan2(p[1][1] - p[0][1], p[1][0] - p[0][0]);
+	        return !(p[0][0] < p[p.length - 1][0] && angle < Math.PI / 2 && angle > -Math.PI / 2);
+	      }
 
+	      function lineString(points) {
+	        return 'M' + points.join('L');
+	      }
 
-	    function mouseout() {
-	        var service = getService();
-	        if (service) { service.setStyles(context, null); }
-	    }
+	      function subpath(points, from, to) {
+	        var sofar = 0;
+	        var start, end, i0, i1;
 
+	        for (var i = 0; i < points.length - 1; i++) {
+	          var a = points[i];
+	          var b = points[i + 1];
+	          var current = geoVecLength(a, b);
+	          var portion;
 
-	    function transform(d) {
-	        var t = svgPointTransform(projection)(d);
-	        if (d.pano && viewerCompassAngle !== null && isFinite(viewerCompassAngle)) {
-	            t += ' rotate(' + Math.floor(viewerCompassAngle) + ',0,0)';
-	        } else if (d.ca) {
-	            t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
-	        }
-	        return t;
-	    }
+	          if (!start && sofar + current >= from) {
+	            portion = (from - sofar) / current;
+	            start = [a[0] + portion * (b[0] - a[0]), a[1] + portion * (b[1] - a[1])];
+	            i0 = i + 1;
+	          }
 
-	    context.photos().on('change.mapillary_images', update);
+	          if (!end && sofar + current >= to) {
+	            portion = (to - sofar) / current;
+	            end = [a[0] + portion * (b[0] - a[0]), a[1] + portion * (b[1] - a[1])];
+	            i1 = i + 1;
+	          }
 
-	    function filterImages(images) {
-	        var showsPano = context.photos().showsPanoramic();
-	        var showsFlat = context.photos().showsFlat();
-	        if (!showsPano || !showsFlat) {
-	            images = images.filter(function(image) {
-	                if (image.pano) { return showsPano; }
-	                return showsFlat;
-	            });
+	          sofar += current;
 	        }
-	        return images;
+
+	        var result = points.slice(i0, i1);
+	        result.unshift(start);
+	        result.push(end);
+	        return result;
+	      }
 	    }
 
-	    function filterSequences(sequences, service) {
-	        var showsPano = context.photos().showsPanoramic();
-	        var showsFlat = context.photos().showsFlat();
-	        if (!showsPano || !showsFlat) {
-	            sequences = sequences.filter(function(sequence) {
-	                if (sequence.properties.hasOwnProperty('pano')) {
-	                    if (sequence.properties.pano) { return showsPano; }
-	                    return showsFlat;
-	                } else {
-	                    // if the sequence doesn't specify pano or not, search its images
-	                    var cProps = sequence.properties.coordinateProperties;
-	                    if (cProps && cProps.image_keys && cProps.image_keys.length > 0) {
-	                        for (var index in cProps.image_keys) {
-	                            var imageKey = cProps.image_keys[index];
-	                            var image = service.cachedImage(imageKey);
-	                            if (image && image.hasOwnProperty('pano')) {
-	                                if (image.pano) { return showsPano; }
-	                                return showsFlat;
-	                            }
-	                        }
-	                    }
-	                }
-	            });
+	    function getAreaLabel(entity, width, height) {
+	      var centroid = path.centroid(entity.asGeoJSON(graph));
+	      var extent = entity.extent(graph);
+	      var areaWidth = projection(extent[1])[0] - projection(extent[0])[0];
+	      if (isNaN(centroid[0]) || areaWidth < 20) return;
+	      var preset = _mainPresetIndex.match(entity, context.graph());
+	      var picon = preset && preset.icon;
+	      var iconSize = 17;
+	      var padding = 2;
+	      var p = {};
+
+	      if (picon) {
+	        // icon and label..
+	        if (addIcon()) {
+	          addLabel(iconSize + padding);
+	          return p;
 	        }
-	        return sequences;
-	    }
+	      } else {
+	        // label only..
+	        if (addLabel(0)) {
+	          return p;
+	        }
+	      }
 
-	    function update() {
+	      function addIcon() {
+	        var iconX = centroid[0] - iconSize / 2;
+	        var iconY = centroid[1] - iconSize / 2;
+	        var bbox = {
+	          minX: iconX,
+	          minY: iconY,
+	          maxX: iconX + iconSize,
+	          maxY: iconY + iconSize
+	        };
 
-	        var z = ~~context.map().zoom();
-	        var showMarkers = (z >= minMarkerZoom);
-	        var showViewfields = (z >= minViewfieldZoom);
-
-	        var service = getService();
-	        var selectedKey = service && service.getSelectedImageKey();
-	        var sequences = (service ? service.sequences(projection) : []);
-	        var images = (service && showMarkers ? service.images(projection) : []);
-
-	        images = filterImages(images);
-	        sequences = filterSequences(sequences, service);
-
-	        var traces = layer.selectAll('.sequences').selectAll('.sequence')
-	            .data(sequences, function(d) { return d.properties.key; });
-
-	        // exit
-	        traces.exit()
-	            .remove();
-
-	        // enter/update
-	        traces = traces.enter()
-	            .append('path')
-	            .attr('class', 'sequence')
-	            .merge(traces)
-	            .attr('d', svgPath(projection).geojson);
-
-
-	        var groups = layer.selectAll('.markers').selectAll('.viewfield-group')
-	            .data(images, function(d) { return d.key; });
-
-	        // exit
-	        groups.exit()
-	            .remove();
-
-	        // enter
-	        var groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', 'viewfield-group')
-	            .on('mouseenter', mouseover)
-	            .on('mouseleave', mouseout)
-	            .on('click', click);
-
-	        groupsEnter
-	            .append('g')
-	            .attr('class', 'viewfield-scale');
-
-	        // update
-	        var markers = groups
-	            .merge(groupsEnter)
-	            .sort(function(a, b) {
-	                return (a.key === selectedKey) ? 1
-	                    : (b.key === selectedKey) ? -1
-	                    : b.loc[1] - a.loc[1];  // sort Y
-	            })
-	            .attr('transform', transform)
-	            .select('.viewfield-scale');
-
-
-	        markers.selectAll('circle')
-	            .data([0])
-	            .enter()
-	            .append('circle')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('r', '6');
-
-	        var viewfields = markers.selectAll('.viewfield')
-	            .data(showViewfields ? [0] : []);
-
-	        viewfields.exit()
-	            .remove();
-
-	        viewfields.enter()               // viewfields may or may not be drawn...
-	            .insert('path', 'circle')    // but if they are, draw below the circles
-	            .attr('class', 'viewfield')
-	            .classed('pano', function() { return this.parentNode.__data__.pano; })
-	            .attr('transform', 'scale(1.5,1.5),translate(-8, -13)')
-	            .attr('d', viewfieldPath);
-
-	        function viewfieldPath() {
-	            var d = this.parentNode.__data__;
-	            if (d.pano) {
-	                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-	            } else {
-	                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-	            }
+	        if (tryInsert([bbox], entity.id + 'I', true)) {
+	          p.transform = 'translate(' + iconX + ',' + iconY + ')';
+	          return true;
 	        }
-	    }
 
+	        return false;
+	      }
 
-	    function drawImages(selection) {
-	        var enabled = svgMapillaryImages.enabled;
-	        var service = getService();
+	      function addLabel(yOffset) {
+	        if (width && areaWidth >= width + 20) {
+	          var labelX = centroid[0];
+	          var labelY = centroid[1] + yOffset;
+	          var bbox = {
+	            minX: labelX - width / 2 - padding,
+	            minY: labelY - height / 2 - padding,
+	            maxX: labelX + width / 2 + padding,
+	            maxY: labelY + height / 2 + padding
+	          };
 
-	        layer = selection.selectAll('.layer-mapillary')
-	            .data(service ? [0] : []);
+	          if (tryInsert([bbox], entity.id, true)) {
+	            p.x = labelX;
+	            p.y = labelY;
+	            p.textAnchor = 'middle';
+	            p.height = height;
+	            return true;
+	          }
+	        }
 
-	        layer.exit()
-	            .remove();
+	        return false;
+	      }
+	    } // force insert a singular bounding box
+	    // singular box only, no array, id better be unique
 
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapillary')
-	            .style('display', enabled ? 'block' : 'none');
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'sequences');
+	    function doInsert(bbox, id) {
+	      bbox.id = id;
+	      var oldbox = _entitybboxes[id];
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'markers');
+	      if (oldbox) {
+	        _rdrawn.remove(oldbox);
+	      }
 
-	        layer = layerEnter
-	            .merge(layer);
+	      _entitybboxes[id] = bbox;
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadImages(projection);
-	            } else {
-	                editOff();
-	            }
-	        }
+	      _rdrawn.insert(bbox);
 	    }
 
+	    function tryInsert(bboxes, id, saveSkipped) {
+	      var skipped = false;
 
-	    drawImages.enabled = function(_) {
-	        if (!arguments.length) { return svgMapillaryImages.enabled; }
-	        svgMapillaryImages.enabled = _;
-	        if (svgMapillaryImages.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
+	      for (var i = 0; i < bboxes.length; i++) {
+	        var bbox = bboxes[i];
+	        bbox.id = id; // Check that label is visible
+
+	        if (bbox.minX < 0 || bbox.minY < 0 || bbox.maxX > dimensions[0] || bbox.maxY > dimensions[1]) {
+	          skipped = true;
+	          break;
 	        }
-	        dispatch.call('change');
-	        return this;
-	    };
 
+	        if (_rdrawn.collides(bbox)) {
+	          skipped = true;
+	          break;
+	        }
+	      }
+
+	      _entitybboxes[id] = bboxes;
 
-	    drawImages.supported = function() {
-	        return !!getService();
-	    };
+	      if (skipped) {
+	        if (saveSkipped) {
+	          _rskipped.load(bboxes);
+	        }
+	      } else {
+	        _rdrawn.load(bboxes);
+	      }
 
+	      return !skipped;
+	    }
 
-	    init();
-	    return drawImages;
-	}
+	    var layer = selection.selectAll('.layer-osm.labels');
+	    layer.selectAll('.labels-group').data(['halo', 'label', 'debug']).enter().append('g').attr('class', function (d) {
+	      return 'labels-group ' + d;
+	    });
+	    var halo = layer.selectAll('.labels-group.halo');
+	    var label = layer.selectAll('.labels-group.label');
+	    var debug = layer.selectAll('.labels-group.debug'); // points
 
-	function svgMapillarySigns(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var layer = select(null);
-	    var _mapillary;
+	    drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
+	    drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point); // lines
 
+	    drawLinePaths(layer, labelled.line, filter, '', positions.line);
+	    drawLineLabels(label, labelled.line, filter, 'linelabel', positions.line);
+	    drawLineLabels(halo, labelled.line, filter, 'linelabel-halo', positions.line); // areas
 
-	    function init() {
-	        if (svgMapillarySigns.initialized) { return; }  // run once
-	        svgMapillarySigns.enabled = false;
-	        svgMapillarySigns.initialized = true;
-	    }
+	    drawAreaLabels(label, labelled.area, filter, 'arealabel', positions.area);
+	    drawAreaLabels(halo, labelled.area, filter, 'arealabel-halo', positions.area);
+	    drawAreaIcons(label, labelled.area, filter, 'areaicon', positions.area);
+	    drawAreaIcons(halo, labelled.area, filter, 'areaicon-halo', positions.area); // debug
 
+	    drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
+	    drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
+	    layer.call(filterLabels);
+	  }
 
-	    function getService() {
-	        if (services.mapillary && !_mapillary) {
-	            _mapillary = services.mapillary;
-	            _mapillary.event.on('loadedSigns', throttledRedraw);
-	        } else if (!services.mapillary && _mapillary) {
-	            _mapillary = null;
-	        }
-	        return _mapillary;
-	    }
+	  function filterLabels(selection) {
+	    var drawLayer = selection.selectAll('.layer-osm.labels');
+	    var layers = drawLayer.selectAll('.labels-group.halo, .labels-group.label');
+	    layers.selectAll('.nolabel').classed('nolabel', false);
+	    var mouse = context.map().mouse();
+	    var graph = context.graph();
+	    var selectedIDs = context.selectedIDs();
+	    var ids = [];
+	    var pad, bbox; // hide labels near the mouse
+
+	    if (mouse) {
+	      pad = 20;
+	      bbox = {
+	        minX: mouse[0] - pad,
+	        minY: mouse[1] - pad,
+	        maxX: mouse[0] + pad,
+	        maxY: mouse[1] + pad
+	      };
 
+	      var nearMouse = _rdrawn.search(bbox).map(function (entity) {
+	        return entity.id;
+	      });
 
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	      ids.push.apply(ids, nearMouse);
+	    } // hide labels on selected nodes (they look weird when dragging / haloed)
 
-	        editOn();
-	    }
 
+	    for (var i = 0; i < selectedIDs.length; i++) {
+	      var entity = graph.hasEntity(selectedIDs[i]);
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
-	        editOff();
+	      if (entity && entity.type === 'node') {
+	        ids.push(selectedIDs[i]);
+	      }
 	    }
 
+	    layers.selectAll(utilEntitySelector(ids)).classed('nolabel', true); // draw the mouse bbox if debugging is on..
+
+	    var debug = selection.selectAll('.labels-group.debug');
+	    var gj = [];
 
-	    function editOn() {
-	        layer.style('display', 'block');
+	    if (context.getDebug('collision')) {
+	      gj = bbox ? [{
+	        type: 'Polygon',
+	        coordinates: [[[bbox.minX, bbox.minY], [bbox.maxX, bbox.minY], [bbox.maxX, bbox.maxY], [bbox.minX, bbox.maxY], [bbox.minX, bbox.minY]]]
+	      }] : [];
 	    }
 
+	    var box = debug.selectAll('.debug-mouse').data(gj); // exit
 
-	    function editOff() {
-	        layer.selectAll('.icon-sign').remove();
-	        layer.style('display', 'none');
-	    }
+	    box.exit().remove(); // enter/update
 
+	    box.enter().append('path').attr('class', 'debug debug-mouse yellow').merge(box).attr('d', d3_geoPath());
+	  }
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
+	  var throttleFilterLabels = throttle(filterLabels, 100);
 
-	        context.map().centerEase(d.loc);
+	  drawLabels.observe = function (selection) {
+	    var listener = function listener() {
+	      throttleFilterLabels(selection);
+	    };
 
-	        var selectedImageKey = service.getSelectedImageKey();
-	        var imageKey;
+	    selection.on('mousemove.hidelabels', listener);
+	    context.on('enter.hidelabels', listener);
+	  };
 
-	        // Pick one of the images the sign was detected in,
-	        // preference given to an image already selected.
-	        d.detections.forEach(function(detection) {
-	            if (!imageKey || selectedImageKey === detection.image_key) {
-	                imageKey = detection.image_key;
-	            }
-	        });
+	  drawLabels.off = function (selection) {
+	    throttleFilterLabels.cancel();
+	    selection.on('mousemove.hidelabels', null);
+	    context.on('enter.hidelabels', null);
+	  };
 
-	        service
-	            .selectImage(context, imageKey)
-	            .updateViewer(context, imageKey)
-	            .showViewer(context);
-	    }
+	  return drawLabels;
+	}
 
+	var _layerEnabled$1 = false;
 
-	    function update() {
-	        var service = getService();
-	        var data = (service ? service.signs(projection) : []);
-	        var selectedImageKey = service.getSelectedImageKey();
-	        var transform = svgPointTransform(projection);
-
-	        var signs = layer.selectAll('.icon-sign')
-	            .data(data, function(d) { return d.key; });
-
-	        // exit
-	        signs.exit()
-	            .remove();
-
-	        // enter
-	        var enter = signs.enter()
-	            .append('g')
-	            .attr('class', 'icon-sign icon-detected')
-	            .on('click', click);
-
-	        enter
-	            .append('use')
-	            .attr('width', '24px')
-	            .attr('height', '24px')
-	            .attr('x', '-12px')
-	            .attr('y', '-12px')
-	            .attr('xlink:href', function(d) { return '#' + d.value; });
-
-	        enter
-	            .append('rect')
-	            .attr('width', '24px')
-	            .attr('height', '24px')
-	            .attr('x', '-12px')
-	            .attr('y', '-12px');
-
-	        // update
-	        signs
-	            .merge(enter)
-	            .attr('transform', transform)
-	            .classed('currentView', function(d) {
-	                return d.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	            })
-	            .sort(function(a, b) {
-	                var aSelected = a.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	                var bSelected = b.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	                if (aSelected === bSelected) {
-	                    return b.loc[1] - a.loc[1]; // sort Y
-	                } else if (aSelected) {
-	                    return 1;
-	                }
-	                return -1;
-	            });
-	    }
+	var _qaService$1;
 
+	function svgImproveOSM(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    return dispatch.call('change');
+	  }, 1000);
 
-	    function drawSigns(selection) {
-	        var enabled = svgMapillarySigns.enabled;
-	        var service = getService();
+	  var minZoom = 12;
+	  var touchLayer = select(null);
+	  var drawLayer = select(null);
+	  var layerVisible = false;
 
-	        layer = selection.selectAll('.layer-mapillary-signs')
-	            .data(service ? [0] : []);
+	  function markerPath(selection, klass) {
+	    selection.attr('class', klass).attr('transform', 'translate(-10, -28)').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+	  } // Loosely-coupled improveOSM service for fetching issues
 
-	        layer.exit()
-	            .remove();
 
-	        layer = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapillary-signs layer-mapillary-detections')
-	            .style('display', enabled ? 'block' : 'none')
-	            .merge(layer);
+	  function getService() {
+	    if (services.improveOSM && !_qaService$1) {
+	      _qaService$1 = services.improveOSM;
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadSigns(projection);
-	            } else {
-	                editOff();
-	            }
-	        }
+	      _qaService$1.on('loaded', throttledRedraw);
+	    } else if (!services.improveOSM && _qaService$1) {
+	      _qaService$1 = null;
 	    }
 
+	    return _qaService$1;
+	  } // Show the markers
+
 
-	    drawSigns.enabled = function(_) {
-	        if (!arguments.length) { return svgMapillarySigns.enabled; }
-	        svgMapillarySigns.enabled = _;
-	        if (svgMapillarySigns.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
-	        dispatch.call('change');
-	        return this;
-	    };
+	  function editOn() {
+	    if (!layerVisible) {
+	      layerVisible = true;
+	      drawLayer.style('display', 'block');
+	    }
+	  } // Immediately remove the markers and their touch targets
 
 
-	    drawSigns.supported = function() {
-	        return !!getService();
-	    };
+	  function editOff() {
+	    if (layerVisible) {
+	      layerVisible = false;
+	      drawLayer.style('display', 'none');
+	      drawLayer.selectAll('.qaItem.improveOSM').remove();
+	      touchLayer.selectAll('.qaItem.improveOSM').remove();
+	    }
+	  } // Enable the layer.  This shows the markers and transitions them to visible.
 
 
-	    init();
-	    return drawSigns;
-	}
+	  function layerOn() {
+	    editOn();
+	    drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+	      return dispatch.call('change');
+	    });
+	  } // Disable the layer.  This transitions the layer invisible and then hides the markers.
 
-	function svgMapillaryMapFeatures(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var layer = select(null);
-	    var _mapillary;
+
+	  function layerOff() {
+	    throttledRedraw.cancel();
+	    drawLayer.interrupt();
+	    touchLayer.selectAll('.qaItem.improveOSM').remove();
+	    drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+	      editOff();
+	      dispatch.call('change');
+	    });
+	  } // Update the issue markers
 
 
-	    function init() {
-	        if (svgMapillaryMapFeatures.initialized) { return; }  // run once
-	        svgMapillaryMapFeatures.enabled = false;
-	        svgMapillaryMapFeatures.initialized = true;
-	    }
+	  function updateMarkers() {
+	    if (!layerVisible || !_layerEnabled$1) return;
+	    var service = getService();
+	    var selectedID = context.selectedErrorID();
+	    var data = service ? service.getItems(projection) : [];
+	    var getTransform = svgPointTransform(projection); // Draw markers..
 
+	    var markers = drawLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	    function getService() {
-	        if (services.mapillary && !_mapillary) {
-	            _mapillary = services.mapillary;
-	            _mapillary.event.on('loadedMapFeatures', throttledRedraw);
-	        } else if (!services.mapillary && _mapillary) {
-	            _mapillary = null;
-	        }
-	        return _mapillary;
-	    }
+	    markers.exit().remove(); // enter
 
+	    var markersEnter = markers.enter().append('g').attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+	    });
+	    markersEnter.append('polygon').call(markerPath, 'shadow');
+	    markersEnter.append('ellipse').attr('cx', 0).attr('cy', 0).attr('rx', 4.5).attr('ry', 2).attr('class', 'stroke');
+	    markersEnter.append('polygon').attr('fill', 'currentColor').call(markerPath, 'qaItem-fill');
+	    markersEnter.append('use').attr('transform', 'translate(-6.5, -23)').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('xlink:href', function (d) {
+	      var picon = d.icon;
 
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
+	      }
+	    }); // update
 
-	        editOn();
-	    }
+	    markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+	      return d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
 
+	    if (touchLayer.empty()) return;
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var targets = touchLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
-	        editOff();
-	    }
+	    targets.exit().remove(); // enter/update
 
+	    targets.enter().append('rect').attr('width', '20px').attr('height', '30px').attr('x', '-10px').attr('y', '-28px').merge(targets).sort(sortY).attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+	    }).attr('transform', getTransform);
 
-	    function editOn() {
-	        layer.style('display', 'block');
+	    function sortY(a, b) {
+	      return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
 	    }
+	  } // Draw the ImproveOSM layer and schedule loading issues and updating markers.
+
 
+	  function drawImproveOSM(selection) {
+	    var service = getService();
+	    var surface = context.surface();
 
-	    function editOff() {
-	        layer.selectAll('.icon-map-feature').remove();
-	        layer.style('display', 'none');
+	    if (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
 	    }
 
+	    drawLayer = selection.selectAll('.layer-improveOSM').data(service ? [0] : []);
+	    drawLayer.exit().remove();
+	    drawLayer = drawLayer.enter().append('g').attr('class', 'layer-improveOSM').style('display', _layerEnabled$1 ? 'block' : 'none').merge(drawLayer);
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
+	    if (_layerEnabled$1) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadIssues(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
+	    }
+	  } // Toggles the layer on and off
 
-	        context.map().centerEase(d.loc);
 
-	        var selectedImageKey = service.getSelectedImageKey();
-	        var imageKey;
+	  drawImproveOSM.enabled = function (val) {
+	    if (!arguments.length) return _layerEnabled$1;
+	    _layerEnabled$1 = val;
 
-	        // Pick one of the images the map feature was detected in,
-	        // preference given to an image already selected.
-	        d.detections.forEach(function(detection) {
-	            if (!imageKey || selectedImageKey === detection.image_key) {
-	                imageKey = detection.image_key;
-	            }
-	        });
+	    if (_layerEnabled$1) {
+	      layerOn();
+	    } else {
+	      layerOff();
 
-	        service
-	            .selectImage(context, imageKey)
-	            .updateViewer(context, imageKey)
-	            .showViewer(context);
+	      if (context.selectedErrorID()) {
+	        context.enter(modeBrowse(context));
+	      }
 	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    function update() {
-	        var service = getService();
-	        var data = (service ? service.mapFeatures(projection) : []);
-	        var selectedImageKey = service && service.getSelectedImageKey();
-	        var transform = svgPointTransform(projection);
-
-	        var mapFeatures = layer.selectAll('.icon-map-feature')
-	            .data(data, function(d) { return d.key; });
-
-	        // exit
-	        mapFeatures.exit()
-	            .remove();
-
-	        // enter
-	        var enter = mapFeatures.enter()
-	            .append('g')
-	            .attr('class', 'icon-map-feature icon-detected')
-	            .on('click', click);
-
-	        enter
-	            .append('title')
-	            .text(function(d) {
-	                var id = d.value.replace(/--/g, '.').replace(/-/g, '_');
-	                return _t('mapillary_map_features.' + id);
-	            });
+	  drawImproveOSM.supported = function () {
+	    return !!getService();
+	  };
 
-	        enter
-	            .append('use')
-	            .attr('width', '24px')
-	            .attr('height', '24px')
-	            .attr('x', '-12px')
-	            .attr('y', '-12px')
-	            .attr('xlink:href', function(d) {
-	                if (d.value === 'object--billboard') {
-	                    // no billboard icon right now, so use the advertisement icon
-	                    return '#object--sign--advertisement';
-	                }
-	                return '#' + d.value;
-	            });
+	  return drawImproveOSM;
+	}
 
-	        enter
-	            .append('rect')
-	            .attr('width', '24px')
-	            .attr('height', '24px')
-	            .attr('x', '-12px')
-	            .attr('y', '-12px');
-
-	        // update
-	        mapFeatures
-	            .merge(enter)
-	            .attr('transform', transform)
-	            .classed('currentView', function(d) {
-	                return d.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	            })
-	            .sort(function(a, b) {
-	                var aSelected = a.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	                var bSelected = b.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	                if (aSelected === bSelected) {
-	                    return b.loc[1] - a.loc[1]; // sort Y
-	                } else if (aSelected) {
-	                    return 1;
-	                }
-	                return -1;
-	            });
-	    }
+	var _layerEnabled = false;
+
+	var _qaService;
 
+	function svgOsmose(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    return dispatch.call('change');
+	  }, 1000);
 
-	    function drawMapFeatures(selection) {
-	        var enabled = svgMapillaryMapFeatures.enabled;
-	        var service = getService();
+	  var minZoom = 12;
+	  var touchLayer = select(null);
+	  var drawLayer = select(null);
+	  var layerVisible = false;
 
-	        layer = selection.selectAll('.layer-mapillary-map-features')
-	            .data(service ? [0] : []);
+	  function markerPath(selection, klass) {
+	    selection.attr('class', klass).attr('transform', 'translate(-10, -28)').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+	  } // Loosely-coupled osmose service for fetching issues
 
-	        layer.exit()
-	            .remove();
 
-	        layer = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapillary-map-features layer-mapillary-detections')
-	            .style('display', enabled ? 'block' : 'none')
-	            .merge(layer);
+	  function getService() {
+	    if (services.osmose && !_qaService) {
+	      _qaService = services.osmose;
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadMapFeatures(projection);
-	            } else {
-	                editOff();
-	            }
-	        }
+	      _qaService.on('loaded', throttledRedraw);
+	    } else if (!services.osmose && _qaService) {
+	      _qaService = null;
 	    }
 
+	    return _qaService;
+	  } // Show the markers
 
-	    drawMapFeatures.enabled = function(_) {
-	        if (!arguments.length) { return svgMapillaryMapFeatures.enabled; }
-	        svgMapillaryMapFeatures.enabled = _;
-	        if (svgMapillaryMapFeatures.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
-	        dispatch.call('change');
-	        return this;
-	    };
 
+	  function editOn() {
+	    if (!layerVisible) {
+	      layerVisible = true;
+	      drawLayer.style('display', 'block');
+	    }
+	  } // Immediately remove the markers and their touch targets
 
-	    drawMapFeatures.supported = function() {
-	        return !!getService();
-	    };
 
+	  function editOff() {
+	    if (layerVisible) {
+	      layerVisible = false;
+	      drawLayer.style('display', 'none');
+	      drawLayer.selectAll('.qaItem.osmose').remove();
+	      touchLayer.selectAll('.qaItem.osmose').remove();
+	    }
+	  } // Enable the layer.  This shows the markers and transitions them to visible.
 
-	    init();
-	    return drawMapFeatures;
-	}
 
-	function svgOpenstreetcamImages(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var minMarkerZoom = 16;
-	    var minViewfieldZoom = 18;
-	    var layer = select(null);
-	    var _openstreetcam;
+	  function layerOn() {
+	    editOn();
+	    drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+	      return dispatch.call('change');
+	    });
+	  } // Disable the layer.  This transitions the layer invisible and then hides the markers.
 
 
-	    function init() {
-	        if (svgOpenstreetcamImages.initialized) { return; }  // run once
-	        svgOpenstreetcamImages.enabled = false;
-	        svgOpenstreetcamImages.initialized = true;
-	    }
+	  function layerOff() {
+	    throttledRedraw.cancel();
+	    drawLayer.interrupt();
+	    touchLayer.selectAll('.qaItem.osmose').remove();
+	    drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+	      editOff();
+	      dispatch.call('change');
+	    });
+	  } // Update the issue markers
 
 
-	    function getService() {
-	        if (services.openstreetcam && !_openstreetcam) {
-	            _openstreetcam = services.openstreetcam;
-	            _openstreetcam.event.on('loadedImages', throttledRedraw);
-	        } else if (!services.openstreetcam && _openstreetcam) {
-	            _openstreetcam = null;
-	        }
+	  function updateMarkers() {
+	    if (!layerVisible || !_layerEnabled) return;
+	    var service = getService();
+	    var selectedID = context.selectedErrorID();
+	    var data = service ? service.getItems(projection) : [];
+	    var getTransform = svgPointTransform(projection); // Draw markers..
 
-	        return _openstreetcam;
-	    }
+	    var markers = drawLayer.selectAll('.qaItem.osmose').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
+	    markers.exit().remove(); // enter
 
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	    var markersEnter = markers.enter().append('g').attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+	    });
+	    markersEnter.append('polygon').call(markerPath, 'shadow');
+	    markersEnter.append('ellipse').attr('cx', 0).attr('cy', 0).attr('rx', 4.5).attr('ry', 2).attr('class', 'stroke');
+	    markersEnter.append('polygon').attr('fill', function (d) {
+	      return service.getColor(d.item);
+	    }).call(markerPath, 'qaItem-fill');
+	    markersEnter.append('use').attr('transform', 'translate(-6.5, -23)').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('xlink:href', function (d) {
+	      var picon = d.icon;
+
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
+	      }
+	    }); // update
 
-	        editOn();
+	    markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+	      return d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
 
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
-	    }
+	    if (touchLayer.empty()) return;
+	    var fillClass = context.getDebug('target') ? 'pink' : 'nocolor';
+	    var targets = touchLayer.selectAll('.qaItem.osmose').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
+	    targets.exit().remove(); // enter/update
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
+	    targets.enter().append('rect').attr('width', '20px').attr('height', '30px').attr('x', '-10px').attr('y', '-28px').merge(targets).sort(sortY).attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+	    }).attr('transform', getTransform);
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', editOff);
+	    function sortY(a, b) {
+	      return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
 	    }
+	  } // Draw the Osmose layer and schedule loading issues and updating markers.
 
 
-	    function editOn() {
-	        layer.style('display', 'block');
-	    }
-
+	  function drawOsmose(selection) {
+	    var service = getService();
+	    var surface = context.surface();
 
-	    function editOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
+	    if (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
 	    }
 
+	    drawLayer = selection.selectAll('.layer-osmose').data(service ? [0] : []);
+	    drawLayer.exit().remove();
+	    drawLayer = drawLayer.enter().append('g').attr('class', 'layer-osmose').style('display', _layerEnabled ? 'block' : 'none').merge(drawLayer);
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
+	    if (_layerEnabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadIssues(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
+	    }
+	  } // Toggles the layer on and off
 
-	        service
-	            .selectImage(context, d)
-	            .updateViewer(context, d)
-	            .showViewer(context);
 
-	        context.map().centerEase(d.loc);
-	    }
+	  drawOsmose.enabled = function (val) {
+	    if (!arguments.length) return _layerEnabled;
+	    _layerEnabled = val;
 
+	    if (_layerEnabled) {
+	      // Strings supplied by Osmose fetched before showing layer for first time
+	      // NOTE: Currently no way to change locale in iD at runtime, would need to re-call this method if that's ever implemented
+	      // Also, If layer is toggled quickly multiple requests are sent
+	      getService().loadStrings().then(layerOn)["catch"](function (err) {
+	        console.log(err); // eslint-disable-line no-console
+	      });
+	    } else {
+	      layerOff();
 
-	    function mouseover(d) {
-	        var service = getService();
-	        if (service) { service.setStyles(context, d); }
+	      if (context.selectedErrorID()) {
+	        context.enter(modeBrowse(context));
+	      }
 	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    function mouseout() {
-	        var service = getService();
-	        if (service) { service.setStyles(context, null); }
-	    }
+	  drawOsmose.supported = function () {
+	    return !!getService();
+	  };
 
+	  return drawOsmose;
+	}
 
-	    function transform(d) {
-	        var t = svgPointTransform(projection)(d);
-	        if (d.ca) {
-	            t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
-	        }
-	        return t;
-	    }
+	function svgStreetside(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
+	  var minZoom = 14;
+	  var minMarkerZoom = 16;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
+	  var _viewerYaw = 0;
+	  var _selectedSequence = null;
 
-	    context.photos().on('change.openstreetcam_images', update);
+	  var _streetside;
+	  /**
+	   * init().
+	   */
 
-	    function update() {
-	        var viewer = context.container().select('.photoviewer');
-	        var selected = viewer.empty() ? undefined : viewer.datum();
 
-	        var z = ~~context.map().zoom();
-	        var showMarkers = (z >= minMarkerZoom);
-	        var showViewfields = (z >= minViewfieldZoom);
+	  function init() {
+	    if (svgStreetside.initialized) return; // run once
 
-	        var service = getService();
-	        var sequences = [];
-	        var images = [];
+	    svgStreetside.enabled = false;
+	    svgStreetside.initialized = true;
+	  }
+	  /**
+	   * getService().
+	   */
 
-	        if (context.photos().showsFlat()) {
-	            sequences = (service ? service.sequences(projection) : []);
-	            images = (service && showMarkers ? service.images(projection) : []);
-	        }
 
-	        var traces = layer.selectAll('.sequences').selectAll('.sequence')
-	            .data(sequences, function(d) { return d.properties.key; });
+	  function getService() {
+	    if (services.streetside && !_streetside) {
+	      _streetside = services.streetside;
 
-	        // exit
-	        traces.exit()
-	            .remove();
+	      _streetside.event.on('viewerChanged.svgStreetside', viewerChanged).on('loadedImages.svgStreetside', throttledRedraw);
+	    } else if (!services.streetside && _streetside) {
+	      _streetside = null;
+	    }
 
-	        // enter/update
-	        traces = traces.enter()
-	            .append('path')
-	            .attr('class', 'sequence')
-	            .merge(traces)
-	            .attr('d', svgPath(projection).geojson);
+	    return _streetside;
+	  }
+	  /**
+	   * showLayer().
+	   */
 
 
-	        var groups = layer.selectAll('.markers').selectAll('.viewfield-group')
-	            .data(images, function(d) { return d.key; });
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    editOn();
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+	      dispatch.call('change');
+	    });
+	  }
+	  /**
+	   * hideLayer().
+	   */
 
-	        // exit
-	        groups.exit()
-	            .remove();
 
-	        // enter
-	        var groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', 'viewfield-group')
-	            .on('mouseenter', mouseover)
-	            .on('mouseleave', mouseout)
-	            .on('click', click);
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+	  }
+	  /**
+	   * editOn().
+	   */
 
-	        groupsEnter
-	            .append('g')
-	            .attr('class', 'viewfield-scale');
 
-	        // update
-	        var markers = groups
-	            .merge(groupsEnter)
-	            .sort(function(a, b) {
-	                return (a === selected) ? 1
-	                    : (b === selected) ? -1
-	                    : b.loc[1] - a.loc[1];  // sort Y
-	            })
-	            .attr('transform', transform)
-	            .select('.viewfield-scale');
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
+	  /**
+	   * editOff().
+	   */
 
 
-	        markers.selectAll('circle')
-	            .data([0])
-	            .enter()
-	            .append('circle')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('r', '6');
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
+	  /**
+	   * click() Handles 'bubble' point click event.
+	   */
 
-	        var viewfields = markers.selectAll('.viewfield')
-	            .data(showViewfields ? [0] : []);
 
-	        viewfields.exit()
-	            .remove();
+	  function click(d3_event, d) {
+	    var service = getService();
+	    if (!service) return; // try to preserve the viewer rotation when staying on the same sequence
 
-	        viewfields.enter()               // viewfields may or may not be drawn...
-	            .insert('path', 'circle')    // but if they are, draw below the circles
-	            .attr('class', 'viewfield')
-	            .attr('transform', 'scale(1.5,1.5),translate(-8, -13)')
-	            .attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
+	    if (d.sequenceKey !== _selectedSequence) {
+	      _viewerYaw = 0; // reset
 	    }
 
+	    _selectedSequence = d.sequenceKey;
+	    service.ensureViewerLoaded(context).then(function () {
+	      service.selectImage(context, d.key).yaw(_viewerYaw).showViewer(context);
+	    });
+	    context.map().centerEase(d.loc);
+	  }
+	  /**
+	   * mouseover().
+	   */
 
-	    function drawImages(selection) {
-	        var enabled = svgOpenstreetcamImages.enabled,
-	            service = getService();
-
-	        layer = selection.selectAll('.layer-openstreetcam')
-	            .data(service ? [0] : []);
 
-	        layer.exit()
-	            .remove();
+	  function mouseover(d3_event, d) {
+	    var service = getService();
+	    if (service) service.setStyles(context, d);
+	  }
+	  /**
+	   * mouseout().
+	   */
 
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-openstreetcam')
-	            .style('display', enabled ? 'block' : 'none');
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'sequences');
+	  function mouseout() {
+	    var service = getService();
+	    if (service) service.setStyles(context, null);
+	  }
+	  /**
+	   * transform().
+	   */
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'markers');
 
-	        layer = layerEnter
-	            .merge(layer);
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
+	    var rot = d.ca + _viewerYaw;
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadImages(projection);
-	            } else {
-	                editOff();
-	            }
-	        }
+	    if (rot) {
+	      t += ' rotate(' + Math.floor(rot) + ',0,0)';
 	    }
 
+	    return t;
+	  }
 
-	    drawImages.enabled = function(_) {
-	        if (!arguments.length) { return svgOpenstreetcamImages.enabled; }
-	        svgOpenstreetcamImages.enabled = _;
-	        if (svgOpenstreetcamImages.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
-	        dispatch.call('change');
-	        return this;
-	    };
+	  function viewerChanged() {
+	    var service = getService();
+	    if (!service) return;
+	    var viewer = service.viewer();
+	    if (!viewer) return; // update viewfield rotation
 
+	    _viewerYaw = viewer.getYaw(); // avoid updating if the map is currently transformed
+	    // e.g. during drags or easing.
 
-	    drawImages.supported = function() {
-	        return !!getService();
-	    };
+	    if (context.map().isTransformed()) return;
+	    layer.selectAll('.viewfield-group.currentView').attr('transform', transform);
+	  }
 
+	  function filterBubbles(bubbles) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	    init();
-	    return drawImages;
-	}
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      bubbles = bubbles.filter(function (bubble) {
+	        return new Date(bubble.captured_at).getTime() >= fromTimestamp;
+	      });
+	    }
 
-	function svgOsm(projection, context, dispatch) {
-	    var enabled = true;
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      bubbles = bubbles.filter(function (bubble) {
+	        return new Date(bubble.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
+	    if (usernames) {
+	      bubbles = bubbles.filter(function (bubble) {
+	        return usernames.indexOf(bubble.captured_by) !== -1;
+	      });
+	    }
 
-	    function drawOsm(selection) {
-	        selection.selectAll('.layer-osm')
-	            .data(['covered', 'areas', 'lines', 'points', 'labels'])
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'layer-osm ' + d; });
+	    return bubbles;
+	  }
 
-	        selection.selectAll('.layer-osm.points').selectAll('.points-group')
-	            .data(['points', 'midpoints', 'vertices', 'turns'])
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'points-group ' + d; });
-	    }
+	  function filterSequences(sequences) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      sequences = sequences.filter(function (sequences) {
+	        return new Date(sequences.properties.captured_at).getTime() >= fromTimestamp;
+	      });
+	    }
 
-	    function showLayer() {
-	        var layer = context.surface().selectAll('.data-layer.osm');
-	        layer.interrupt();
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      sequences = sequences.filter(function (sequences) {
+	        return new Date(sequences.properties.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	        layer
-	            .classed('disabled', false)
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end interrupt', function () {
-	                dispatch.call('change');
-	            });
+	    if (usernames) {
+	      sequences = sequences.filter(function (sequences) {
+	        return usernames.indexOf(sequences.properties.captured_by) !== -1;
+	      });
 	    }
 
+	    return sequences;
+	  }
+	  /**
+	   * update().
+	   */
 
-	    function hideLayer() {
-	        var layer = context.surface().selectAll('.data-layer.osm');
-	        layer.interrupt();
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end interrupt', function () {
-	                layer.classed('disabled', true);
-	                dispatch.call('change');
-	            });
+	  function update() {
+	    var viewer = context.container().select('.photoviewer');
+	    var selected = viewer.empty() ? undefined : viewer.datum();
+	    var z = ~~context.map().zoom();
+	    var showMarkers = z >= minMarkerZoom;
+	    var showViewfields = z >= minViewfieldZoom;
+	    var service = getService();
+	    var sequences = [];
+	    var bubbles = [];
+
+	    if (context.photos().showsPanoramic()) {
+	      sequences = service ? service.sequences(projection) : [];
+	      bubbles = service && showMarkers ? service.bubbles(projection) : [];
+	      sequences = filterSequences(sequences);
+	      bubbles = filterBubbles(bubbles);
 	    }
 
+	    var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+	      return d.properties.key;
+	    }); // exit
 
-	    drawOsm.enabled = function(val) {
-	        if (!arguments.length) { return enabled; }
-	        enabled = val;
+	    traces.exit().remove(); // enter/update
 
-	        if (enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
+	    traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
+	    var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(bubbles, function (d) {
+	      // force reenter once bubbles are attached to a sequence
+	      return d.key + (d.sequenceKey ? 'v1' : 'v0');
+	    }); // exit
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	    groups.exit().remove(); // enter
 
+	    var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+	    groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-	    return drawOsm;
-	}
+	    var markers = groups.merge(groupsEnter).sort(function (a, b) {
+	      return a === selected ? 1 : b === selected ? -1 : b.loc[1] - a.loc[1];
+	    }).attr('transform', transform).select('.viewfield-scale');
+	    markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+	    var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+	    viewfields.exit().remove(); // viewfields may or may not be drawn...
+	    // but if they are, draw below the circles
 
-	var _notesEnabled = false;
-	var _osmService;
+	    viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
 
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	function svgNotes(projection, context, dispatch$1) {
-	    if (!dispatch$1) { dispatch$1 = dispatch('change'); }
-	    var throttledRedraw = throttle(function () { dispatch$1.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var touchLayer = select(null);
-	    var drawLayer = select(null);
-	    var _notesVisible = false;
+	      if (d.pano) {
+	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+	      } else {
+	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	      }
+	    }
+	  }
+	  /**
+	   * drawImages()
+	   * drawImages is the method that is returned (and that runs) every time 'svgStreetside()' is called.
+	   * 'svgStreetside()' is called from index.js
+	   */
 
 
-	    function markerPath(selection, klass) {
-	        selection
-	            .attr('class', klass)
-	            .attr('transform', 'translate(-8, -22)')
-	            .attr('d', 'm17.5,0l-15,0c-1.37,0 -2.5,1.12 -2.5,2.5l0,11.25c0,1.37 1.12,2.5 2.5,2.5l3.75,0l0,3.28c0,0.38 0.43,0.6 0.75,0.37l4.87,-3.65l5.62,0c1.37,0 2.5,-1.12 2.5,-2.5l0,-11.25c0,-1.37 -1.12,-2.5 -2.5,-2.5z');
+	  function drawImages(selection) {
+	    var enabled = svgStreetside.enabled;
+	    var service = getService();
+	    layer = selection.selectAll('.layer-streetside-images').data(service ? [0] : []);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-streetside-images').style('display', enabled ? 'block' : 'none');
+	    layerEnter.append('g').attr('class', 'sequences');
+	    layerEnter.append('g').attr('class', 'markers');
+	    layer = layerEnter.merge(layer);
+
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadBubbles(projection);
+	      } else {
+	        editOff();
+	      }
 	    }
+	  }
+	  /**
+	   * drawImages.enabled().
+	   */
 
 
-	    // Loosely-coupled osm service for fetching notes.
-	    function getService() {
-	        if (services.osm && !_osmService) {
-	            _osmService = services.osm;
-	            _osmService.on('loadedNotes', throttledRedraw);
-	        } else if (!services.osm && _osmService) {
-	            _osmService = null;
-	        }
+	  drawImages.enabled = function (_) {
+	    if (!arguments.length) return svgStreetside.enabled;
+	    svgStreetside.enabled = _;
 
-	        return _osmService;
+	    if (svgStreetside.enabled) {
+	      showLayer();
+	      context.photos().on('change.streetside', update);
+	    } else {
+	      hideLayer();
+	      context.photos().on('change.streetside', null);
 	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
+	  /**
+	   * drawImages.supported().
+	   */
 
-	    // Show the notes
-	    function editOn() {
-	        if (!_notesVisible) {
-	            _notesVisible = true;
-	            drawLayer
-	                .style('display', 'block');
-	        }
-	    }
 
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
-	    // Immediately remove the notes and their touch targets
-	    function editOff() {
-	        if (_notesVisible) {
-	            _notesVisible = false;
-	            drawLayer
-	                .style('display', 'none');
-	            drawLayer.selectAll('.note')
-	                .remove();
-	            touchLayer.selectAll('.note')
-	                .remove();
-	        }
-	    }
+	  init();
+	  return drawImages;
+	}
 
+	function svgMapillaryImages(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	    // Enable the layer.  This shows the notes and transitions them to visible.
-	    function layerOn() {
-	        editOn();
+	  var minZoom = 12;
+	  var minMarkerZoom = 16;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
 
-	        drawLayer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end interrupt', function () {
-	                dispatch$1.call('change');
-	            });
-	    }
+	  var _mapillary;
 
+	  function init() {
+	    if (svgMapillaryImages.initialized) return; // run once
 
-	    // Disable the layer.  This transitions the layer invisible and then hides the notes.
-	    function layerOff() {
-	        throttledRedraw.cancel();
-	        drawLayer.interrupt();
-	        touchLayer.selectAll('.note')
-	            .remove();
+	    svgMapillaryImages.enabled = false;
+	    svgMapillaryImages.initialized = true;
+	  }
 
-	        drawLayer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end interrupt', function () {
-	                editOff();
-	                dispatch$1.call('change');
-	            });
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
+
+	      _mapillary.event.on('loadedImages', throttledRedraw);
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
 	    }
 
+	    return _mapillary;
+	  }
 
-	    // Update the note markers
-	    function updateMarkers() {
-	        if (!_notesVisible || !_notesEnabled) { return; }
-
-	        var service = getService();
-	        var selectedID = context.selectedNoteID();
-	        var data = (service ? service.notes(projection) : []);
-	        var getTransform = svgPointTransform(projection);
-
-	        // Draw markers..
-	        var notes = drawLayer.selectAll('.note')
-	            .data(data, function(d) { return d.status + d.id; });
-
-	        // exit
-	        notes.exit()
-	            .remove();
-
-	        // enter
-	        var notesEnter = notes.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'note note-' + d.id + ' ' + d.status; })
-	            .classed('new', function(d) { return d.id < 0; });
-
-	        notesEnter
-	            .append('ellipse')
-	            .attr('cx', 0.5)
-	            .attr('cy', 1)
-	            .attr('rx', 6.5)
-	            .attr('ry', 3)
-	            .attr('class', 'stroke');
-
-	        notesEnter
-	            .append('path')
-	            .call(markerPath, 'shadow');
-
-	        notesEnter
-	            .append('use')
-	            .attr('class', 'note-fill')
-	            .attr('width', '20px')
-	            .attr('height', '20px')
-	            .attr('x', '-8px')
-	            .attr('y', '-22px')
-	            .attr('xlink:href', '#iD-icon-note');
-
-	        notesEnter.selectAll('.icon-annotation')
-	            .data(function(d) { return [d]; })
-	            .enter()
-	            .append('use')
-	            .attr('class', 'icon-annotation')
-	            .attr('width', '10px')
-	            .attr('height', '10px')
-	            .attr('x', '-3px')
-	            .attr('y', '-19px')
-	            .attr('xlink:href', function(d) {
-	                return '#iD-icon-' + (d.id < 0 ? 'plus' : (d.status === 'open' ? 'close' : 'apply'));
-	            });
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    editOn();
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+	      dispatch.call('change');
+	    });
+	  }
 
-	        // update
-	        notes
-	            .merge(notesEnter)
-	            .sort(sortY)
-	            .classed('selected', function(d) {
-	                var mode = context.mode();
-	                var isMoving = mode && mode.id === 'drag-note';  // no shadows when dragging
-	                return !isMoving && d.id === selectedID;
-	            })
-	            .attr('transform', getTransform);
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+	  }
 
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	        // Draw targets..
-	        if (touchLayer.empty()) { return; }
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
 
-	        var targets = touchLayer.selectAll('.note')
-	            .data(data, function(d) { return d.id; });
+	  function click(d3_event, image) {
+	    var service = getService();
+	    if (!service) return;
+	    service.ensureViewerLoaded(context).then(function () {
+	      service.selectImage(context, image.id).showViewer(context);
+	    });
+	    context.map().centerEase(image.loc);
+	  }
 
-	        // exit
-	        targets.exit()
-	            .remove();
+	  function mouseover(d3_event, image) {
+	    var service = getService();
+	    if (service) service.setStyles(context, image);
+	  }
 
-	        // enter/update
-	        targets.enter()
-	            .append('rect')
-	            .attr('width', '20px')
-	            .attr('height', '20px')
-	            .attr('x', '-8px')
-	            .attr('y', '-22px')
-	            .merge(targets)
-	            .sort(sortY)
-	            .attr('class', function(d) {
-	                var newClass = (d.id < 0 ? 'new' : '');
-	                return 'note target note-' + d.id + ' ' + fillClass + newClass;
-	            })
-	            .attr('transform', getTransform);
+	  function mouseout() {
+	    var service = getService();
+	    if (service) service.setStyles(context, null);
+	  }
 
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
 
-	        function sortY(a, b) {
-	            return (a.id === selectedID) ? 1 : (b.id === selectedID) ? -1 : b.loc[1] - a.loc[1];
-	        }
+	    if (d.ca) {
+	      t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
 	    }
 
+	    return t;
+	  }
 
-	    // Draw the notes layer and schedule loading notes and updating markers.
-	    function drawNotes(selection) {
-	        var service = getService();
-
-	        var surface = context.surface();
-	        if (surface && !surface.empty()) {
-	            touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-	        }
-
-	        drawLayer = selection.selectAll('.layer-notes')
-	            .data(service ? [0] : []);
+	  function filterImages(images) {
+	    var showsPano = context.photos().showsPanoramic();
+	    var showsFlat = context.photos().showsFlat();
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
 
-	        drawLayer.exit()
-	            .remove();
+	    if (!showsPano || !showsFlat) {
+	      images = images.filter(function (image) {
+	        if (image.is_pano) return showsPano;
+	        return showsFlat;
+	      });
+	    }
 
-	        drawLayer = drawLayer.enter()
-	            .append('g')
-	            .attr('class', 'layer-notes')
-	            .style('display', _notesEnabled ? 'block' : 'none')
-	            .merge(drawLayer);
+	    if (fromDate) {
+	      images = images.filter(function (image) {
+	        return new Date(image.captured_at).getTime() >= new Date(fromDate).getTime();
+	      });
+	    }
 
-	        if (_notesEnabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                service.loadNotes(projection);
-	                updateMarkers();
-	            } else {
-	                editOff();
-	            }
-	        }
+	    if (toDate) {
+	      images = images.filter(function (image) {
+	        return new Date(image.captured_at).getTime() <= new Date(toDate).getTime();
+	      });
 	    }
 
+	    return images;
+	  }
 
-	    // Toggles the layer on and off
-	    drawNotes.enabled = function(val) {
-	        if (!arguments.length) { return _notesEnabled; }
+	  function filterSequences(sequences) {
+	    var showsPano = context.photos().showsPanoramic();
+	    var showsFlat = context.photos().showsFlat();
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
 
-	        _notesEnabled = val;
-	        if (_notesEnabled) {
-	            layerOn();
-	        } else {
-	            layerOff();
-	            if (context.selectedNoteID()) {
-	                context.enter(modeBrowse(context));
-	            }
+	    if (!showsPano || !showsFlat) {
+	      sequences = sequences.filter(function (sequence) {
+	        if (sequence.properties.hasOwnProperty('is_pano')) {
+	          if (sequence.properties.is_pano) return showsPano;
+	          return showsFlat;
 	        }
 
-	        dispatch$1.call('change');
-	        return this;
-	    };
-
-
-	    return drawNotes;
-	}
+	        return false;
+	      });
+	    }
 
-	function svgTouch() {
+	    if (fromDate) {
+	      sequences = sequences.filter(function (sequence) {
+	        return new Date(sequence.properties.captured_at).getTime() >= new Date(fromDate).getTime().toString();
+	      });
+	    }
 
-	    function drawTouch(selection) {
-	        selection.selectAll('.layer-touch')
-	            .data(['areas', 'lines', 'points', 'turns', 'markers'])
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'layer-touch ' + d; });
+	    if (toDate) {
+	      sequences = sequences.filter(function (sequence) {
+	        return new Date(sequence.properties.captured_at).getTime() <= new Date(toDate).getTime().toString();
+	      });
 	    }
 
-	    return drawTouch;
-	}
+	    return sequences;
+	  }
 
-	function refresh(selection, node) {
-	    var cr = node.getBoundingClientRect();
-	    var prop = [cr.width, cr.height];
-	    selection.property('__dimensions__', prop);
-	    return prop;
-	}
+	  function update() {
+	    var z = ~~context.map().zoom();
+	    var showMarkers = z >= minMarkerZoom;
+	    var showViewfields = z >= minViewfieldZoom;
+	    var service = getService();
+	    var sequences = service ? service.sequences(projection) : [];
+	    var images = service && showMarkers ? service.images(projection) : [];
+	    images = filterImages(images);
+	    sequences = filterSequences(sequences);
+	    service.filterViewer(context);
+	    var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+	      return d.properties.id;
+	    }); // exit
+
+	    traces.exit().remove(); // enter/update
+
+	    traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
+	    var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(images, function (d) {
+	      return d.id;
+	    }); // exit
+
+	    groups.exit().remove(); // enter
+
+	    var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+	    groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
+
+	    var markers = groups.merge(groupsEnter).sort(function (a, b) {
+	      return b.loc[1] - a.loc[1]; // sort Y
+	    }).attr('transform', transform).select('.viewfield-scale');
+	    markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+	    var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+	    viewfields.exit().remove();
+	    viewfields.enter() // viewfields may or may not be drawn...
+	    .insert('path', 'circle') // but if they are, draw below the circles
+	    .attr('class', 'viewfield').classed('pano', function () {
+	      return this.parentNode.__data__.is_pano;
+	    }).attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
 
-	function utilGetDimensions(selection, force) {
-	    if (!selection || selection.empty()) {
-	        return [0, 0];
+	    function viewfieldPath() {
+	      if (this.parentNode.__data__.is_pano) {
+	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+	      } else {
+	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	      }
 	    }
-	    var node = selection.node(),
-	        cached = selection.property('__dimensions__');
-	    return (!cached || force) ? refresh(selection, node) : cached;
-	}
-
+	  }
 
-	function utilSetDimensions(selection, dimensions) {
-	    if (!selection || selection.empty()) {
-	        return selection;
-	    }
-	    var node = selection.node();
-	    if (dimensions === null) {
-	        refresh(selection, node);
-	        return selection;
+	  function drawImages(selection) {
+	    var enabled = svgMapillaryImages.enabled;
+	    var service = getService();
+	    layer = selection.selectAll('.layer-mapillary').data(service ? [0] : []);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-mapillary').style('display', enabled ? 'block' : 'none');
+	    layerEnter.append('g').attr('class', 'sequences');
+	    layerEnter.append('g').attr('class', 'markers');
+	    layer = layerEnter.merge(layer);
+
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadImages(projection);
+	      } else {
+	        editOff();
+	      }
 	    }
-	    return selection
-	        .property('__dimensions__', [dimensions[0], dimensions[1]])
-	        .attr('width', dimensions[0])
-	        .attr('height', dimensions[1]);
-	}
-
-	function svgLayers(projection, context) {
-	    var dispatch$1 = dispatch('change');
-	    var svg = select(null);
-	    var _layers = [
-	        { id: 'osm', layer: svgOsm(projection, context, dispatch$1) },
-	        { id: 'notes', layer: svgNotes(projection, context, dispatch$1) },
-	        { id: 'data', layer: svgData(projection, context, dispatch$1) },
-	        { id: 'keepRight', layer: svgKeepRight(projection, context, dispatch$1) },
-	        { id: 'improveOSM', layer: svgImproveOSM(projection, context, dispatch$1) },
-	        { id: 'osmose', layer: svgOsmose(projection, context, dispatch$1) },
-	        { id: 'streetside', layer: svgStreetside(projection, context, dispatch$1)},
-	        { id: 'mapillary', layer: svgMapillaryImages(projection, context, dispatch$1) },
-	        { id: 'mapillary-map-features',  layer: svgMapillaryMapFeatures(projection, context, dispatch$1) },
-	        { id: 'mapillary-signs',  layer: svgMapillarySigns(projection, context, dispatch$1) },
-	        { id: 'openstreetcam', layer: svgOpenstreetcamImages(projection, context, dispatch$1) },
-	        { id: 'debug', layer: svgDebug(projection, context) },
-	        { id: 'geolocate', layer: svgGeolocate(projection) },
-	        { id: 'touch', layer: svgTouch() }
-	    ];
-
-
-	    function drawLayers(selection) {
-	        svg = selection.selectAll('.surface')
-	            .data([0]);
+	  }
 
-	        svg = svg.enter()
-	            .append('svg')
-	            .attr('class', 'surface')
-	            .merge(svg);
+	  drawImages.enabled = function (_) {
+	    if (!arguments.length) return svgMapillaryImages.enabled;
+	    svgMapillaryImages.enabled = _;
 
-	        var defs = svg.selectAll('.surface-defs')
-	            .data([0]);
+	    if (svgMapillaryImages.enabled) {
+	      showLayer();
+	      context.photos().on('change.mapillary_images', update);
+	    } else {
+	      hideLayer();
+	      context.photos().on('change.mapillary_images', null);
+	    }
 
-	        defs.enter()
-	            .append('defs')
-	            .attr('class', 'surface-defs');
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	        var groups = svg.selectAll('.data-layer')
-	            .data(_layers);
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
-	        groups.exit()
-	            .remove();
+	  init();
+	  return drawImages;
+	}
 
-	        groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'data-layer ' + d.id; })
-	            .merge(groups)
-	            .each(function(d) { select(this).call(d.layer); });
-	    }
+	function svgMapillaryPosition(projection, context) {
+	  var throttledRedraw = throttle(function () {
+	    update();
+	  }, 1000);
 
+	  var minZoom = 12;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
 
-	    drawLayers.all = function() {
-	        return _layers;
-	    };
+	  var _mapillary;
 
+	  var viewerCompassAngle;
 
-	    drawLayers.layer = function(id) {
-	        var obj = _layers.find(function(o) { return o.id === id; });
-	        return obj && obj.layer;
-	    };
+	  function init() {
+	    if (svgMapillaryPosition.initialized) return; // run once
 
+	    svgMapillaryPosition.initialized = true;
+	  }
 
-	    drawLayers.only = function(what) {
-	        var arr = [].concat(what);
-	        var all = _layers.map(function(layer) { return layer.id; });
-	        return drawLayers.remove(utilArrayDifference(all, arr));
-	    };
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
+	      _mapillary.event.on('imageChanged', throttledRedraw);
 
-	    drawLayers.remove = function(what) {
-	        var arr = [].concat(what);
-	        arr.forEach(function(id) {
-	            _layers = _layers.filter(function(o) { return o.id !== id; });
-	        });
-	        dispatch$1.call('change');
-	        return this;
-	    };
+	      _mapillary.event.on('bearingChanged', function (e) {
+	        viewerCompassAngle = e.bearing;
+	        if (context.map().isTransformed()) return;
+	        layer.selectAll('.viewfield-group.currentView').filter(function (d) {
+	          return d.is_pano;
+	        }).attr('transform', transform);
+	      });
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
+	    }
 
+	    return _mapillary;
+	  }
 
-	    drawLayers.add = function(what) {
-	        var arr = [].concat(what);
-	        arr.forEach(function(obj) {
-	            if ('id' in obj && 'layer' in obj) {
-	                _layers.push(obj);
-	            }
-	        });
-	        dispatch$1.call('change');
-	        return this;
-	    };
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
 
-	    drawLayers.dimensions = function(val) {
-	        if (!arguments.length) { return utilGetDimensions(svg); }
-	        utilSetDimensions(svg, val);
-	        return this;
-	    };
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
 
+	    if (d.is_pano && viewerCompassAngle !== null && isFinite(viewerCompassAngle)) {
+	      t += ' rotate(' + Math.floor(viewerCompassAngle) + ',0,0)';
+	    } else if (d.ca) {
+	      t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
+	    }
 
-	    return utilRebind(drawLayers, dispatch$1, 'on');
-	}
+	    return t;
+	  }
 
-	function svgLines(projection, context) {
-	    var detected = utilDetect();
+	  function update() {
+	    var z = ~~context.map().zoom();
+	    var showViewfields = z >= minViewfieldZoom;
+	    var service = getService();
+	    var image = service && service.getActiveImage();
+	    var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(image ? [image] : [], function (d) {
+	      return d.id;
+	    }); // exit
 
-	    var highway_stack = {
-	        motorway: 0,
-	        motorway_link: 1,
-	        trunk: 2,
-	        trunk_link: 3,
-	        primary: 4,
-	        primary_link: 5,
-	        secondary: 6,
-	        tertiary: 7,
-	        unclassified: 8,
-	        residential: 9,
-	        service: 10,
-	        footway: 11
-	    };
+	    groups.exit().remove(); // enter
 
+	    var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group currentView highlighted');
+	    groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-	    function drawTargets(selection, graph, entities, filter) {
-	        var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-	        var getPath = svgPath(projection).geojson;
-	        var activeID = context.activeID();
-	        var base = context.history().base();
+	    var markers = groups.merge(groupsEnter).attr('transform', transform).select('.viewfield-scale');
+	    markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+	    var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+	    viewfields.exit().remove();
+	    viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
+	  }
 
-	        // The targets and nopes will be MultiLineString sub-segments of the ways
-	        var data = { targets: [], nopes: [] };
+	  function drawImages(selection) {
+	    var service = getService();
+	    layer = selection.selectAll('.layer-mapillary-position').data(service ? [0] : []);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-mapillary-position');
+	    layerEnter.append('g').attr('class', 'markers');
+	    layer = layerEnter.merge(layer);
+
+	    if (service && ~~context.map().zoom() >= minZoom) {
+	      editOn();
+	      update();
+	    } else {
+	      editOff();
+	    }
+	  }
 
-	        entities.forEach(function(way) {
-	            var features = svgSegmentWay(way, graph, activeID);
-	            data.targets.push.apply(data.targets, features.passive);
-	            data.nopes.push.apply(data.nopes, features.active);
-	        });
+	  drawImages.enabled = function () {
+	    update();
+	    return this;
+	  };
 
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
-	        // Targets allow hover and vertex snapping
-	        var targetData = data.targets.filter(getPath);
-	        var targets = selection.selectAll('.line.target-allowed')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(targetData, function key(d) { return d.id; });
+	  init();
+	  return drawImages;
+	}
 
-	        // exit
-	        targets.exit()
-	            .remove();
+	function svgMapillarySigns(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	        var segmentWasEdited = function(d) {
-	            var wayID = d.properties.entity.id;
-	            // if the whole line was edited, don't draw segment changes
-	            if (!base.entities[wayID] ||
-	                !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-	                return false;
-	            }
-	            return d.properties.nodes.some(function(n) {
-	                return !base.entities[n.id] ||
-	                       !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
-	            });
-	        };
+	  var minZoom = 12;
+	  var layer = select(null);
 
-	        // enter/update
-	        targets.enter()
-	            .append('path')
-	            .merge(targets)
-	            .attr('d', getPath)
-	            .attr('class', function(d) {
-	                return 'way line target target-allowed ' + targetClass + d.id;
-	            })
-	            .classed('segment-edited', segmentWasEdited);
-
-	        // NOPE
-	        var nopeData = data.nopes.filter(getPath);
-	        var nopes = selection.selectAll('.line.target-nope')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(nopeData, function key(d) { return d.id; });
-
-	        // exit
-	        nopes.exit()
-	            .remove();
-
-	        // enter/update
-	        nopes.enter()
-	            .append('path')
-	            .merge(nopes)
-	            .attr('d', getPath)
-	            .attr('class', function(d) {
-	                return 'way line target target-nope ' + nopeClass + d.id;
-	            })
-	            .classed('segment-edited', segmentWasEdited);
-	    }
-
-
-	    function drawLines(selection, graph, entities, filter) {
-	        var base = context.history().base();
-
-	        function waystack(a, b) {
-	            var selected = context.selectedIDs();
-	            var scoreA = selected.indexOf(a.id) !== -1 ? 20 : 0;
-	            var scoreB = selected.indexOf(b.id) !== -1 ? 20 : 0;
-
-	            if (a.tags.highway) { scoreA -= highway_stack[a.tags.highway]; }
-	            if (b.tags.highway) { scoreB -= highway_stack[b.tags.highway]; }
-	            return scoreA - scoreB;
-	        }
-
-
-	        function drawLineGroup(selection, klass, isSelected) {
-	            // Note: Don't add `.selected` class in draw modes
-	            var mode = context.mode();
-	            var isDrawing = mode && /^draw/.test(mode.id);
-	            var selectedClass = (!isDrawing && isSelected) ? 'selected ' : '';
-
-	            var lines = selection
-	                .selectAll('path')
-	                .filter(filter)
-	                .data(getPathData(isSelected), osmEntity.key);
-
-	            lines.exit()
-	                .remove();
-
-	            // Optimization: Call expensive TagClasses only on enter selection. This
-	            // works because osmEntity.key is defined to include the entity v attribute.
-	            lines.enter()
-	                .append('path')
-	                .attr('class', function(d) {
-
-	                    var prefix = 'way line';
-
-	                    // if this line isn't styled by its own tags
-	                    if (!d.hasInterestingTags()) {
-
-	                        var parentRelations = graph.parentRelations(d);
-	                        var parentMultipolygons = parentRelations.filter(function(relation) {
-	                            return relation.isMultipolygon();
-	                        });
-
-	                        // and if it's a member of at least one multipolygon relation
-	                        if (parentMultipolygons.length > 0 &&
-	                            // and only multipolygon relations
-	                            parentRelations.length === parentMultipolygons.length) {
-	                            // then fudge the classes to style this as an area edge
-	                            prefix = 'relation area';
-	                        }
-	                    }
+	  var _mapillary;
 
-	                    var oldMPClass = oldMultiPolygonOuters[d.id] ? 'old-multipolygon ' : '';
-	                    return prefix + ' ' + klass + ' ' + selectedClass + oldMPClass + d.id;
-	                })
-	                .classed('added', function(d) {
-	                    return !base.entities[d.id];
-	                })
-	                .classed('geometry-edited', function(d) {
-	                    return graph.entities[d.id] &&
-	                        base.entities[d.id] &&
-	                        !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
-	                })
-	                .classed('retagged', function(d) {
-	                    return graph.entities[d.id] &&
-	                        base.entities[d.id] &&
-	                        !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-	                })
-	                .call(svgTagClasses())
-	                .merge(lines)
-	                .sort(waystack)
-	                .attr('d', getPath)
-	                .call(svgTagClasses().tags(svgRelationMemberTags(graph)));
+	  function init() {
+	    if (svgMapillarySigns.initialized) return; // run once
 
-	            return selection;
-	        }
+	    svgMapillarySigns.enabled = false;
+	    svgMapillarySigns.initialized = true;
+	  }
 
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	        function getPathData(isSelected) {
-	            return function() {
-	                var layer = this.parentNode.__data__;
-	                var data = pathdata[layer] || [];
-	                return data.filter(function(d) {
-	                    if (isSelected)
-	                        { return context.selectedIDs().indexOf(d.id) !== -1; }
-	                    else
-	                        { return context.selectedIDs().indexOf(d.id) === -1; }
-	                });
-	            };
-	        }
+	      _mapillary.event.on('loadedSigns', throttledRedraw);
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
+	    }
 
-	        function addMarkers(layergroup, pathclass, groupclass, groupdata, marker) {
-	            var markergroup = layergroup
-	                .selectAll('g.' + groupclass)
-	                .data([pathclass]);
+	    return _mapillary;
+	  }
 
-	            markergroup = markergroup.enter()
-	                .append('g')
-	                .attr('class', groupclass)
-	                .merge(markergroup);
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    service.loadSignResources(context);
+	    editOn();
+	  }
 
-	            var markers = markergroup
-	                .selectAll('path')
-	                .filter(filter)
-	                .data(
-	                    function data() { return groupdata[this.parentNode.__data__] || []; },
-	                    function key(d) { return [d.id, d.index]; }
-	                );
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    editOff();
+	  }
 
-	            markers.exit()
-	                .remove();
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	            markers = markers.enter()
-	                .append('path')
-	                .attr('class', pathclass)
-	                .merge(markers)
-	                .attr('marker-mid', marker)
-	                .attr('d', function(d) { return d.d; });
+	  function editOff() {
+	    layer.selectAll('.icon-sign').remove();
+	    layer.style('display', 'none');
+	  }
 
-	            if (detected.ie) {
-	                markers.each(function() { this.parentNode.insertBefore(this, this); });
-	            }
+	  function click(d3_event, d) {
+	    var service = getService();
+	    if (!service) return;
+	    context.map().centerEase(d.loc);
+	    var selectedImageId = service.getActiveImage() && service.getActiveImage().id;
+	    service.getDetections(d.id).then(function (detections) {
+	      if (detections.length) {
+	        var imageId = detections[0].image.id;
+
+	        if (imageId === selectedImageId) {
+	          service.highlightDetection(detections[0]).selectImage(context, imageId);
+	        } else {
+	          service.ensureViewerLoaded(context).then(function () {
+	            service.highlightDetection(detections[0]).selectImage(context, imageId).showViewer(context);
+	          });
 	        }
+	      }
+	    });
+	  }
 
+	  function filterData(detectedFeatures) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
 
-	        var getPath = svgPath(projection, graph);
-	        var ways = [];
-	        var onewaydata = {};
-	        var sideddata = {};
-	        var oldMultiPolygonOuters = {};
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      detectedFeatures = detectedFeatures.filter(function (feature) {
+	        return new Date(feature.last_seen_at).getTime() >= fromTimestamp;
+	      });
+	    }
 
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-	            var outer = osmOldMultipolygonOuterMember(entity, graph);
-	            if (outer) {
-	                ways.push(entity.mergeTags(outer.tags));
-	                oldMultiPolygonOuters[outer.id] = true;
-	            } else if (entity.geometry(graph) === 'line') {
-	                ways.push(entity);
-	            }
-	        }
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      detectedFeatures = detectedFeatures.filter(function (feature) {
+	        return new Date(feature.first_seen_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	        ways = ways.filter(getPath);
-	        var pathdata = utilArrayGroupBy(ways, function(way) { return way.layer(); });
+	    return detectedFeatures;
+	  }
 
-	        Object.keys(pathdata).forEach(function(k) {
-	            var v = pathdata[k];
-	            var onewayArr = v.filter(function(d) { return d.isOneWay(); });
-	            var onewaySegments = svgMarkerSegments(
-	                projection, graph, 35,
-	                function shouldReverse(entity) { return entity.tags.oneway === '-1'; },
-	                function bothDirections(entity) {
-	                    return entity.tags.oneway === 'reversible' || entity.tags.oneway === 'alternating';
-	                }
-	            );
-	            onewaydata[k] = utilArrayFlatten(onewayArr.map(onewaySegments));
-
-	            var sidedArr = v.filter(function(d) { return d.isSided(); });
-	            var sidedSegments = svgMarkerSegments(
-	                projection, graph, 30,
-	                function shouldReverse() { return false; },
-	                function bothDirections() { return false; }
-	            );
-	            sideddata[k] = utilArrayFlatten(sidedArr.map(sidedSegments));
-	        });
+	  function update() {
+	    var service = getService();
+	    var data = service ? service.signs(projection) : [];
+	    data = filterData(data);
+	    var transform = svgPointTransform(projection);
+	    var signs = layer.selectAll('.icon-sign').data(data, function (d) {
+	      return d.id;
+	    }); // exit
+
+	    signs.exit().remove(); // enter
+
+	    var enter = signs.enter().append('g').attr('class', 'icon-sign icon-detected').on('click', click);
+	    enter.append('use').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px').attr('xlink:href', function (d) {
+	      return '#' + d.value;
+	    });
+	    enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
 
+	    signs.merge(enter).attr('transform', transform);
+	  }
 
-	        var covered = selection.selectAll('.layer-osm.covered');     // under areas
-	        var uncovered = selection.selectAll('.layer-osm.lines');     // over areas
-	        var touchLayer = selection.selectAll('.layer-touch.lines');
-
-	        // Draw lines..
-	        [covered, uncovered].forEach(function(selection) {
-	            var range = (selection === covered ? range$1(-10,0) : range$1(0,11));
-	            var layergroup = selection
-	                .selectAll('g.layergroup')
-	                .data(range);
-
-	            layergroup = layergroup.enter()
-	                .append('g')
-	                .attr('class', function(d) { return 'layergroup layer' + String(d); })
-	                .merge(layergroup);
-
-	            layergroup
-	                .selectAll('g.linegroup')
-	                .data(['shadow', 'casing', 'stroke', 'shadow-highlighted', 'casing-highlighted', 'stroke-highlighted'])
-	                .enter()
-	                .append('g')
-	                .attr('class', function(d) { return 'linegroup line-' + d; });
-
-	            layergroup.selectAll('g.line-shadow')
-	                .call(drawLineGroup, 'shadow', false);
-	            layergroup.selectAll('g.line-casing')
-	                .call(drawLineGroup, 'casing', false);
-	            layergroup.selectAll('g.line-stroke')
-	                .call(drawLineGroup, 'stroke', false);
-
-	            layergroup.selectAll('g.line-shadow-highlighted')
-	                .call(drawLineGroup, 'shadow', true);
-	            layergroup.selectAll('g.line-casing-highlighted')
-	                .call(drawLineGroup, 'casing', true);
-	            layergroup.selectAll('g.line-stroke-highlighted')
-	                .call(drawLineGroup, 'stroke', true);
-
-	            addMarkers(layergroup, 'oneway', 'onewaygroup', onewaydata, 'url(#ideditor-oneway-marker)');
-	            addMarkers(layergroup, 'sided', 'sidedgroup', sideddata,
-	                function marker(d) {
-	                    var category = graph.entity(d.id).sidednessIdentifier();
-	                    return 'url(#ideditor-sided-marker-' + category + ')';
-	                }
-	            );
-	        });
+	  function drawSigns(selection) {
+	    var enabled = svgMapillarySigns.enabled;
+	    var service = getService();
+	    layer = selection.selectAll('.layer-mapillary-signs').data(service ? [0] : []);
+	    layer.exit().remove();
+	    layer = layer.enter().append('g').attr('class', 'layer-mapillary-signs layer-mapillary-detections').style('display', enabled ? 'block' : 'none').merge(layer);
 
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, ways, filter);
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadSigns(projection);
+	        service.showSignDetections(true);
+	      } else {
+	        editOff();
+	      }
+	    } else if (service) {
+	      service.showSignDetections(false);
 	    }
+	  }
 
+	  drawSigns.enabled = function (_) {
+	    if (!arguments.length) return svgMapillarySigns.enabled;
+	    svgMapillarySigns.enabled = _;
 
-	    return drawLines;
-	}
-
-	function svgMidpoints(projection, context) {
-	    var targetRadius = 8;
-
-	    function drawTargets(selection, graph, entities, filter) {
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var getTransform = svgPointTransform(projection).geojson;
-
-	        var data = entities.map(function(midpoint) {
-	            return {
-	                type: 'Feature',
-	                id: midpoint.id,
-	                properties: {
-	                    target: true,
-	                    entity: midpoint
-	                },
-	                geometry: {
-	                    type: 'Point',
-	                    coordinates: midpoint.loc
-	                }
-	            };
-	        });
-
-	        var targets = selection.selectAll('.midpoint.target')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(data, function key(d) { return d.id; });
+	    if (svgMapillarySigns.enabled) {
+	      showLayer();
+	      context.photos().on('change.mapillary_signs', update);
+	    } else {
+	      hideLayer();
+	      context.photos().on('change.mapillary_signs', null);
+	    }
 
-	        // exit
-	        targets.exit()
-	            .remove();
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	        // enter/update
-	        targets.enter()
-	            .append('circle')
-	            .attr('r', targetRadius)
-	            .merge(targets)
-	            .attr('class', function(d) { return 'node midpoint target ' + fillClass + d.id; })
-	            .attr('transform', getTransform);
-	    }
+	  drawSigns.supported = function () {
+	    return !!getService();
+	  };
 
+	  init();
+	  return drawSigns;
+	}
 
-	    function drawMidpoints(selection, graph, entities, filter, extent) {
-	        var drawLayer = selection.selectAll('.layer-osm.points .points-group.midpoints');
-	        var touchLayer = selection.selectAll('.layer-touch.points');
+	function svgMapillaryMapFeatures(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	        var mode = context.mode();
-	        if ((mode && mode.id !== 'select') || !context.map().withinEditableZoom()) {
-	            drawLayer.selectAll('.midpoint').remove();
-	            touchLayer.selectAll('.midpoint.target').remove();
-	            return;
-	        }
+	  var minZoom = 12;
+	  var layer = select(null);
 
-	        var poly = extent.polygon();
-	        var midpoints = {};
+	  var _mapillary;
 
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
+	  function init() {
+	    if (svgMapillaryMapFeatures.initialized) return; // run once
 
-	            if (entity.type !== 'way') { continue; }
-	            if (!filter(entity)) { continue; }
-	            if (context.selectedIDs().indexOf(entity.id) < 0) { continue; }
+	    svgMapillaryMapFeatures.enabled = false;
+	    svgMapillaryMapFeatures.initialized = true;
+	  }
 
-	            var nodes = graph.childNodes(entity);
-	            for (var j = 0; j < nodes.length - 1; j++) {
-	                var a = nodes[j];
-	                var b = nodes[j + 1];
-	                var id = [a.id, b.id].sort().join('-');
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	                if (midpoints[id]) {
-	                    midpoints[id].parents.push(entity);
-	                } else if (geoVecLength(projection(a.loc), projection(b.loc)) > 40) {
-	                    var point = geoVecInterp(a.loc, b.loc, 0.5);
-	                    var loc = null;
+	      _mapillary.event.on('loadedMapFeatures', throttledRedraw);
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
+	    }
 
-	                    if (extent.intersects(point)) {
-	                        loc = point;
-	                    } else {
-	                        for (var k = 0; k < 4; k++) {
-	                            point = geoLineIntersection([a.loc, b.loc], [poly[k], poly[k + 1]]);
-	                            if (point &&
-	                                geoVecLength(projection(a.loc), projection(point)) > 20 &&
-	                                geoVecLength(projection(b.loc), projection(point)) > 20)
-	                            {
-	                                loc = point;
-	                                break;
-	                            }
-	                        }
-	                    }
+	    return _mapillary;
+	  }
 
-	                    if (loc) {
-	                        midpoints[id] = {
-	                            type: 'midpoint',
-	                            id: id,
-	                            loc: loc,
-	                            edge: [a.id, b.id],
-	                            parents: [entity]
-	                        };
-	                    }
-	                }
-	            }
-	        }
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    service.loadObjectResources(context);
+	    editOn();
+	  }
 
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    editOff();
+	  }
 
-	        function midpointFilter(d) {
-	            if (midpoints[d.id])
-	                { return true; }
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	            for (var i = 0; i < d.parents.length; i++) {
-	                if (filter(d.parents[i])) {
-	                    return true;
-	                }
-	            }
+	  function editOff() {
+	    layer.selectAll('.icon-map-feature').remove();
+	    layer.style('display', 'none');
+	  }
 
-	            return false;
+	  function click(d3_event, d) {
+	    var service = getService();
+	    if (!service) return;
+	    context.map().centerEase(d.loc);
+	    var selectedImageId = service.getActiveImage() && service.getActiveImage().id;
+	    service.getDetections(d.id).then(function (detections) {
+	      if (detections.length) {
+	        var imageId = detections[0].image.id;
+
+	        if (imageId === selectedImageId) {
+	          service.highlightDetection(detections[0]).selectImage(context, imageId);
+	        } else {
+	          service.ensureViewerLoaded(context).then(function () {
+	            service.highlightDetection(detections[0]).selectImage(context, imageId).showViewer(context);
+	          });
 	        }
+	      }
+	    });
+	  }
 
+	  function filterData(detectedFeatures) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
 
-	        var groups = drawLayer.selectAll('.midpoint')
-	            .filter(midpointFilter)
-	            .data(Object.values(midpoints), function(d) { return d.id; });
-
-	        groups.exit()
-	            .remove();
+	    if (fromDate) {
+	      detectedFeatures = detectedFeatures.filter(function (feature) {
+	        return new Date(feature.last_seen_at).getTime() >= new Date(fromDate).getTime();
+	      });
+	    }
 
-	        var enter = groups.enter()
-	            .insert('g', ':first-child')
-	            .attr('class', 'midpoint');
+	    if (toDate) {
+	      detectedFeatures = detectedFeatures.filter(function (feature) {
+	        return new Date(feature.first_seen_at).getTime() <= new Date(toDate).getTime();
+	      });
+	    }
 
-	        enter
-	            .append('polygon')
-	            .attr('points', '-6,8 10,0 -6,-8')
-	            .attr('class', 'shadow');
+	    return detectedFeatures;
+	  }
 
-	        enter
-	            .append('polygon')
-	            .attr('points', '-3,4 5,0 -3,-4')
-	            .attr('class', 'fill');
+	  function update() {
+	    var service = getService();
+	    var data = service ? service.mapFeatures(projection) : [];
+	    data = filterData(data);
+	    var transform = svgPointTransform(projection);
+	    var mapFeatures = layer.selectAll('.icon-map-feature').data(data, function (d) {
+	      return d.id;
+	    }); // exit
+
+	    mapFeatures.exit().remove(); // enter
+
+	    var enter = mapFeatures.enter().append('g').attr('class', 'icon-map-feature icon-detected').on('click', click);
+	    enter.append('title').text(function (d) {
+	      var id = d.value.replace(/--/g, '.').replace(/-/g, '_');
+	      return _t('mapillary_map_features.' + id);
+	    });
+	    enter.append('use').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px').attr('xlink:href', function (d) {
+	      if (d.value === 'object--billboard') {
+	        // no billboard icon right now, so use the advertisement icon
+	        return '#object--sign--advertisement';
+	      }
 
-	        groups = groups
-	            .merge(enter)
-	            .attr('transform', function(d) {
-	                var translate = svgPointTransform(projection);
-	                var a = graph.entity(d.edge[0]);
-	                var b = graph.entity(d.edge[1]);
-	                var angle = geoAngle(a, b, projection) * (180 / Math.PI);
-	                return translate(d) + ' rotate(' + angle + ')';
-	            })
-	            .call(svgTagClasses().tags(
-	                function(d) { return d.parents[0].tags; }
-	            ));
+	      return '#' + d.value;
+	    });
+	    enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
 
-	        // Propagate data bindings.
-	        groups.select('polygon.shadow');
-	        groups.select('polygon.fill');
+	    mapFeatures.merge(enter).attr('transform', transform);
+	  }
 
+	  function drawMapFeatures(selection) {
+	    var enabled = svgMapillaryMapFeatures.enabled;
+	    var service = getService();
+	    layer = selection.selectAll('.layer-mapillary-map-features').data(service ? [0] : []);
+	    layer.exit().remove();
+	    layer = layer.enter().append('g').attr('class', 'layer-mapillary-map-features layer-mapillary-detections').style('display', enabled ? 'block' : 'none').merge(layer);
 
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, Object.values(midpoints), midpointFilter);
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadMapFeatures(projection);
+	        service.showFeatureDetections(true);
+	      } else {
+	        editOff();
+	      }
+	    } else if (service) {
+	      service.showFeatureDetections(false);
 	    }
+	  }
 
-	    return drawMidpoints;
-	}
-
-	function svgPoints(projection, context) {
+	  drawMapFeatures.enabled = function (_) {
+	    if (!arguments.length) return svgMapillaryMapFeatures.enabled;
+	    svgMapillaryMapFeatures.enabled = _;
 
-	    function markerPath(selection, klass) {
-	        selection
-	            .attr('class', klass)
-	            .attr('transform', 'translate(-8, -23)')
-	            .attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+	    if (svgMapillaryMapFeatures.enabled) {
+	      showLayer();
+	      context.photos().on('change.mapillary_map_features', update);
+	    } else {
+	      hideLayer();
+	      context.photos().on('change.mapillary_map_features', null);
 	    }
 
-	    function sortY(a, b) {
-	        return b.loc[1] - a.loc[1];
-	    }
+	    dispatch.call('change');
+	    return this;
+	  };
 
+	  drawMapFeatures.supported = function () {
+	    return !!getService();
+	  };
 
-	    // Avoid exit/enter if we're just moving stuff around.
-	    // The node will get a new version but we only need to run the update selection.
-	    function fastEntityKey(d) {
-	        var mode = context.mode();
-	        var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
-	        return isMoving ? d.id : osmEntity.key(d);
-	    }
+	  init();
+	  return drawMapFeatures;
+	}
 
+	function svgKartaviewImages(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	    function drawTargets(selection, graph, entities, filter) {
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var getTransform = svgPointTransform(projection).geojson;
-	        var activeID = context.activeID();
-	        var data = [];
+	  var minZoom = 12;
+	  var minMarkerZoom = 16;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
 
-	        entities.forEach(function(node) {
-	            if (activeID === node.id) { return; }   // draw no target on the activeID
+	  var _kartaview;
 
-	            data.push({
-	                type: 'Feature',
-	                id: node.id,
-	                properties: {
-	                    target: true,
-	                    entity: node
-	                },
-	                geometry: node.asGeoJSON()
-	            });
-	        });
+	  function init() {
+	    if (svgKartaviewImages.initialized) return; // run once
 
-	        var targets = selection.selectAll('.point.target')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(data, function key(d) { return d.id; });
-
-	        // exit
-	        targets.exit()
-	            .remove();
-
-	        // enter/update
-	        targets.enter()
-	            .append('rect')
-	            .attr('x', -10)
-	            .attr('y', -26)
-	            .attr('width', 20)
-	            .attr('height', 30)
-	            .merge(targets)
-	            .attr('class', function(d) { return 'node point target ' + fillClass + d.id; })
-	            .attr('transform', getTransform);
-	    }
-
-
-	    function drawPoints(selection, graph, entities, filter) {
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
-	        var base = context.history().base();
-
-	        // Points with a direction will render as vertices at higher zooms..
-	        function renderAsPoint(entity) {
-	            return entity.geometry(graph) === 'point' &&
-	                !(zoom >= 18 && entity.directions(graph, projection).length);
-	        }
-
-	        // All points will render as vertices in wireframe mode too..
-	        var points = wireframe ? [] : entities.filter(renderAsPoint);
-	        points.sort(sortY);
-
-
-	        var drawLayer = selection.selectAll('.layer-osm.points .points-group.points');
-	        var touchLayer = selection.selectAll('.layer-touch.points');
-
-	        // Draw points..
-	        var groups = drawLayer.selectAll('g.point')
-	            .filter(filter)
-	            .data(points, fastEntityKey);
-
-	        groups.exit()
-	            .remove();
-
-	        var enter = groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'node point ' + d.id; })
-	            .order();
-
-	        enter
-	            .append('path')
-	            .call(markerPath, 'shadow');
-
-	        enter
-	            .append('ellipse')
-	            .attr('cx', 0.5)
-	            .attr('cy', 1)
-	            .attr('rx', 6.5)
-	            .attr('ry', 3)
-	            .attr('class', 'stroke');
-
-	        enter
-	            .append('path')
-	            .call(markerPath, 'stroke');
-
-	        enter
-	            .append('use')
-	            .attr('transform', 'translate(-5, -19)')
-	            .attr('class', 'icon')
-	            .attr('width', '11px')
-	            .attr('height', '11px');
-
-	        groups = groups
-	            .merge(enter)
-	            .attr('transform', svgPointTransform(projection))
-	            .classed('added', function(d) {
-	                return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
-	            })
-	            .classed('moved', function(d) {
-	                return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
-	            })
-	            .classed('retagged', function(d) {
-	                return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-	            })
-	            .call(svgTagClasses());
-
-	        groups.select('.shadow');   // propagate bound data
-	        groups.select('.stroke');   // propagate bound data
-	        groups.select('.icon')      // propagate bound data
-	            .attr('xlink:href', function(entity) {
-	                var preset = _mainPresetIndex.match(entity, graph);
-	                var picon = preset && preset.icon;
-
-	                if (!picon) {
-	                    return '';
-	                } else {
-	                    var isMaki = /^maki-/.test(picon);
-	                    return '#' + picon + (isMaki ? '-11' : '');
-	                }
-	            });
+	    svgKartaviewImages.enabled = false;
+	    svgKartaviewImages.initialized = true;
+	  }
 
+	  function getService() {
+	    if (services.kartaview && !_kartaview) {
+	      _kartaview = services.kartaview;
 
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, points, filter);
+	      _kartaview.event.on('loadedImages', throttledRedraw);
+	    } else if (!services.kartaview && _kartaview) {
+	      _kartaview = null;
 	    }
 
+	    return _kartaview;
+	  }
 
-	    return drawPoints;
-	}
-
-	function svgTurns(projection, context) {
-
-	    function icon(turn) {
-	        var u = turn.u ? '-u' : '';
-	        if (turn.no) { return '#iD-turn-no' + u; }
-	        if (turn.only) { return '#iD-turn-only' + u; }
-	        return '#iD-turn-yes' + u;
-	    }
-
-	    function drawTurns(selection, graph, turns) {
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    editOn();
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+	      dispatch.call('change');
+	    });
+	  }
 
-	        function turnTransform(d) {
-	            var pxRadius = 50;
-	            var toWay = graph.entity(d.to.way);
-	            var toPoints = graph.childNodes(toWay)
-	                .map(function (n) { return n.loc; })
-	                .map(projection);
-	            var toLength = geoPathLength(toPoints);
-	            var mid = toLength / 2;    // midpoint of destination way
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+	  }
 
-	            var toNode = graph.entity(d.to.node);
-	            var toVertex = graph.entity(d.to.vertex);
-	            var a = geoAngle(toVertex, toNode, projection);
-	            var o = projection(toVertex.loc);
-	            var r = d.u ? 0                  // u-turn: no radius
-	                : !toWay.__via ? pxRadius    // leaf way: put marker at pxRadius
-	                : Math.min(mid, pxRadius);   // via way: prefer pxRadius, fallback to mid for very short ways
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	            return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' +
-	                'rotate(' + a * 180 / Math.PI + ')';
-	        }
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
 
+	  function click(d3_event, d) {
+	    var service = getService();
+	    if (!service) return;
+	    service.ensureViewerLoaded(context).then(function () {
+	      service.selectImage(context, d.key).showViewer(context);
+	    });
+	    context.map().centerEase(d.loc);
+	  }
 
-	        var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
-	        var touchLayer = selection.selectAll('.layer-touch.turns');
+	  function mouseover(d3_event, d) {
+	    var service = getService();
+	    if (service) service.setStyles(context, d);
+	  }
 
-	        // Draw turns..
-	        var groups = drawLayer.selectAll('g.turn')
-	            .data(turns, function(d) { return d.key; });
+	  function mouseout() {
+	    var service = getService();
+	    if (service) service.setStyles(context, null);
+	  }
 
-	        // exit
-	        groups.exit()
-	            .remove();
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
 
-	        // enter
-	        var groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'turn ' + d.key; });
+	    if (d.ca) {
+	      t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
+	    }
 
-	        var turnsEnter = groupsEnter
-	            .filter(function(d) { return !d.u; });
+	    return t;
+	  }
 
-	        turnsEnter.append('rect')
-	            .attr('transform', 'translate(-22, -12)')
-	            .attr('width', '44')
-	            .attr('height', '24');
+	  function filterImages(images) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	        turnsEnter.append('use')
-	            .attr('transform', 'translate(-22, -12)')
-	            .attr('width', '44')
-	            .attr('height', '24');
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      images = images.filter(function (item) {
+	        return new Date(item.captured_at).getTime() >= fromTimestamp;
+	      });
+	    }
 
-	        var uEnter = groupsEnter
-	            .filter(function(d) { return d.u; });
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      images = images.filter(function (item) {
+	        return new Date(item.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	        uEnter.append('circle')
-	            .attr('r', '16');
+	    if (usernames) {
+	      images = images.filter(function (item) {
+	        return usernames.indexOf(item.captured_by) !== -1;
+	      });
+	    }
 
-	        uEnter.append('use')
-	            .attr('transform', 'translate(-16, -16)')
-	            .attr('width', '32')
-	            .attr('height', '32');
+	    return images;
+	  }
 
-	        // update
-	        groups = groups
-	            .merge(groupsEnter)
-	            .attr('opacity', function(d) { return d.direct === false ? '0.7' : null; })
-	            .attr('transform', turnTransform);
+	  function filterSequences(sequences) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	        groups.select('use')
-	            .attr('xlink:href', icon);
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      sequences = sequences.filter(function (image) {
+	        return new Date(image.properties.captured_at).getTime() >= fromTimestamp;
+	      });
+	    }
 
-	        groups.select('rect');      // propagate bound data
-	        groups.select('circle');    // propagate bound data
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      sequences = sequences.filter(function (image) {
+	        return new Date(image.properties.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
+	    if (usernames) {
+	      sequences = sequences.filter(function (image) {
+	        return usernames.indexOf(image.properties.captured_by) !== -1;
+	      });
+	    }
 
-	        // Draw touch targets..
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        groups = touchLayer.selectAll('g.turn')
-	            .data(turns, function(d) { return d.key; });
+	    return sequences;
+	  }
 
-	        // exit
-	        groups.exit()
-	            .remove();
+	  function update() {
+	    var viewer = context.container().select('.photoviewer');
+	    var selected = viewer.empty() ? undefined : viewer.datum();
+	    var z = ~~context.map().zoom();
+	    var showMarkers = z >= minMarkerZoom;
+	    var showViewfields = z >= minViewfieldZoom;
+	    var service = getService();
+	    var sequences = [];
+	    var images = [];
 
-	        // enter
-	        groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'turn ' + d.key; });
+	    if (context.photos().showsFlat()) {
+	      sequences = service ? service.sequences(projection) : [];
+	      images = service && showMarkers ? service.images(projection) : [];
+	      sequences = filterSequences(sequences);
+	      images = filterImages(images);
+	    }
 
-	        turnsEnter = groupsEnter
-	            .filter(function(d) { return !d.u; });
+	    var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+	      return d.properties.key;
+	    }); // exit
 
-	        turnsEnter.append('rect')
-	            .attr('class', 'target ' + fillClass)
-	            .attr('transform', 'translate(-22, -12)')
-	            .attr('width', '44')
-	            .attr('height', '24');
+	    traces.exit().remove(); // enter/update
 
-	        uEnter = groupsEnter
-	            .filter(function(d) { return d.u; });
+	    traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
+	    var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(images, function (d) {
+	      return d.key;
+	    }); // exit
 
-	        uEnter.append('circle')
-	            .attr('class', 'target ' + fillClass)
-	            .attr('r', '16');
+	    groups.exit().remove(); // enter
 
-	        // update
-	        groups = groups
-	            .merge(groupsEnter)
-	            .attr('transform', turnTransform);
+	    var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+	    groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-	        groups.select('rect');      // propagate bound data
-	        groups.select('circle');    // propagate bound data
+	    var markers = groups.merge(groupsEnter).sort(function (a, b) {
+	      return a === selected ? 1 : b === selected ? -1 : b.loc[1] - a.loc[1]; // sort Y
+	    }).attr('transform', transform).select('.viewfield-scale');
+	    markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+	    var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+	    viewfields.exit().remove();
+	    viewfields.enter() // viewfields may or may not be drawn...
+	    .insert('path', 'circle') // but if they are, draw below the circles
+	    .attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
+	  }
 
+	  function drawImages(selection) {
+	    var enabled = svgKartaviewImages.enabled,
+	        service = getService();
+	    layer = selection.selectAll('.layer-kartaview').data(service ? [0] : []);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-kartaview').style('display', enabled ? 'block' : 'none');
+	    layerEnter.append('g').attr('class', 'sequences');
+	    layerEnter.append('g').attr('class', 'markers');
+	    layer = layerEnter.merge(layer);
 
-	        return this;
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadImages(projection);
+	      } else {
+	        editOff();
+	      }
 	    }
+	  }
 
-	    return drawTurns;
-	}
-
-	function svgVertices(projection, context) {
-	    var radiuses = {
-	        //       z16-, z17,   z18+,  w/icon
-	        shadow: [6,    7.5,   7.5,   12],
-	        stroke: [2.5,  3.5,   3.5,   8],
-	        fill:   [1,    1.5,   1.5,   1.5]
-	    };
-
-	    var _currHoverTarget;
-	    var _currPersistent = {};
-	    var _currHover = {};
-	    var _prevHover = {};
-	    var _currSelected = {};
-	    var _prevSelected = {};
-	    var _radii = {};
-
+	  drawImages.enabled = function (_) {
+	    if (!arguments.length) return svgKartaviewImages.enabled;
+	    svgKartaviewImages.enabled = _;
 
-	    function sortY(a, b) {
-	        return b.loc[1] - a.loc[1];
+	    if (svgKartaviewImages.enabled) {
+	      showLayer();
+	      context.photos().on('change.kartaview_images', update);
+	    } else {
+	      hideLayer();
+	      context.photos().on('change.kartaview_images', null);
 	    }
 
-	    // Avoid exit/enter if we're just moving stuff around.
-	    // The node will get a new version but we only need to run the update selection.
-	    function fastEntityKey(d) {
-	        var mode = context.mode();
-	        var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
-	        return isMoving ? d.id : osmEntity.key(d);
-	    }
+	    dispatch.call('change');
+	    return this;
+	  };
 
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
-	    function draw(selection, graph, vertices, sets, filter) {
-	        sets = sets || { selected: {}, important: {}, hovered: {} };
+	  init();
+	  return drawImages;
+	}
 
-	        var icons = {};
-	        var directions = {};
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
-	        var z = (zoom < 17 ? 0 : zoom < 18 ? 1 : 2);
-	        var activeID = context.activeID();
-	        var base = context.history().base();
+	function svgOsm(projection, context, dispatch) {
+	  var enabled = true;
 
+	  function drawOsm(selection) {
+	    selection.selectAll('.layer-osm').data(['covered', 'areas', 'lines', 'points', 'labels']).enter().append('g').attr('class', function (d) {
+	      return 'layer-osm ' + d;
+	    });
+	    selection.selectAll('.layer-osm.points').selectAll('.points-group').data(['points', 'midpoints', 'vertices', 'turns']).enter().append('g').attr('class', function (d) {
+	      return 'points-group ' + d;
+	    });
+	  }
 
-	        function getIcon(d) {
-	            // always check latest entity, as fastEntityKey avoids enter/exit now
-	            var entity = graph.entity(d.id);
-	            if (entity.id in icons) { return icons[entity.id]; }
+	  function showLayer() {
+	    var layer = context.surface().selectAll('.data-layer.osm');
+	    layer.interrupt();
+	    layer.classed('disabled', false).style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+	      dispatch.call('change');
+	    });
+	  }
 
-	            icons[entity.id] =
-	                entity.hasInterestingTags() &&
-	                _mainPresetIndex.match(entity, graph).icon;
+	  function hideLayer() {
+	    var layer = context.surface().selectAll('.data-layer.osm');
+	    layer.interrupt();
+	    layer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+	      layer.classed('disabled', true);
+	      dispatch.call('change');
+	    });
+	  }
 
-	            return icons[entity.id];
-	        }
+	  drawOsm.enabled = function (val) {
+	    if (!arguments.length) return enabled;
+	    enabled = val;
 
+	    if (enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
+	    }
 
-	        // memoize directions results, return false for empty arrays (for use in filter)
-	        function getDirections(entity) {
-	            if (entity.id in directions) { return directions[entity.id]; }
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	            var angles = entity.directions(graph, projection);
-	            directions[entity.id] = angles.length ? angles : false;
-	            return angles;
-	        }
+	  return drawOsm;
+	}
 
+	var _notesEnabled = false;
 
-	        function updateAttributes(selection) {
-	            ['shadow', 'stroke', 'fill'].forEach(function(klass) {
-	                var rads = radiuses[klass];
-	                selection.selectAll('.' + klass)
-	                    .each(function(entity) {
-	                        var i = z && getIcon(entity);
-	                        var r = rads[i ? 3 : z];
+	var _osmService;
 
-	                        // slightly increase the size of unconnected endpoints #3775
-	                        if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
-	                            r += 1.5;
-	                        }
+	function svgNotes(projection, context, dispatch) {
+	  if (!dispatch) {
+	    dispatch = dispatch$8('change');
+	  }
 
-	                        if (klass === 'shadow') {   // remember this value, so we don't need to
-	                            _radii[entity.id] = r;  // recompute it when we draw the touch targets
-	                        }
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	                        select(this)
-	                            .attr('r', r)
-	                            .attr('visibility', (i && klass === 'fill') ? 'hidden' : null);
-	                    });
-	            });
-	        }
+	  var minZoom = 12;
+	  var touchLayer = select(null);
+	  var drawLayer = select(null);
+	  var _notesVisible = false;
 
-	        vertices.sort(sortY);
-
-	        var groups = selection.selectAll('g.vertex')
-	            .filter(filter)
-	            .data(vertices, fastEntityKey);
-
-	        // exit
-	        groups.exit()
-	            .remove();
-
-	        // enter
-	        var enter = groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'node vertex ' + d.id; })
-	            .order();
-
-	        enter
-	            .append('circle')
-	            .attr('class', 'shadow');
-
-	        enter
-	            .append('circle')
-	            .attr('class', 'stroke');
-
-	        // Vertices with tags get a fill.
-	        enter.filter(function(d) { return d.hasInterestingTags(); })
-	            .append('circle')
-	            .attr('class', 'fill');
-
-	        // update
-	        groups = groups
-	            .merge(enter)
-	            .attr('transform', svgPointTransform(projection))
-	            .classed('sibling', function(d) { return d.id in sets.selected; })
-	            .classed('shared', function(d) { return graph.isShared(d); })
-	            .classed('endpoint', function(d) { return d.isEndpoint(graph); })
-	            .classed('added', function(d) {
-	                return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
-	            })
-	            .classed('moved', function(d) {
-	                return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
-	            })
-	            .classed('retagged', function(d) {
-	                return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-	            })
-	            .call(updateAttributes);
-
-	        // Vertices with icons get a `use`.
-	        var iconUse = groups
-	            .selectAll('.icon')
-	            .data(function data(d) { return zoom >= 17 && getIcon(d) ? [d] : []; }, fastEntityKey);
-
-	        // exit
-	        iconUse.exit()
-	            .remove();
-
-	        // enter
-	        iconUse.enter()
-	            .append('use')
-	            .attr('class', 'icon')
-	            .attr('width', '11px')
-	            .attr('height', '11px')
-	            .attr('transform', 'translate(-5.5, -5.5)')
-	            .attr('xlink:href', function(d) {
-	                var picon = getIcon(d);
-	                var isMaki = /^maki-/.test(picon);
-	                return '#' + picon + (isMaki ? '-11' : '');
-	            });
+	  function markerPath(selection, klass) {
+	    selection.attr('class', klass).attr('transform', 'translate(-8, -22)').attr('d', 'm17.5,0l-15,0c-1.37,0 -2.5,1.12 -2.5,2.5l0,11.25c0,1.37 1.12,2.5 2.5,2.5l3.75,0l0,3.28c0,0.38 0.43,0.6 0.75,0.37l4.87,-3.65l5.62,0c1.37,0 2.5,-1.12 2.5,-2.5l0,-11.25c0,-1.37 -1.12,-2.5 -2.5,-2.5z');
+	  } // Loosely-coupled osm service for fetching notes.
 
 
-	        // Vertices with directions get viewfields
-	        var dgroups = groups
-	            .selectAll('.viewfieldgroup')
-	            .data(function data(d) { return zoom >= 18 && getDirections(d) ? [d] : []; }, fastEntityKey);
-
-	        // exit
-	        dgroups.exit()
-	            .remove();
-
-	        // enter/update
-	        dgroups = dgroups.enter()
-	            .insert('g', '.shadow')
-	            .attr('class', 'viewfieldgroup')
-	            .merge(dgroups);
-
-	        var viewfields = dgroups.selectAll('.viewfield')
-	            .data(getDirections, function key(d) { return osmEntity.key(d); });
-
-	        // exit
-	        viewfields.exit()
-	            .remove();
-
-	        // enter/update
-	        viewfields.enter()
-	            .append('path')
-	            .attr('class', 'viewfield')
-	            .attr('d', 'M0,0H0')
-	            .merge(viewfields)
-	            .attr('marker-start', 'url(#ideditor-viewfield-marker' + (wireframe ? '-wireframe' : '') + ')')
-	            .attr('transform', function(d) { return 'rotate(' + d + ')'; });
-	    }
-
-
-	    function drawTargets(selection, graph, entities, filter) {
-	        var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-	        var getTransform = svgPointTransform(projection).geojson;
-	        var activeID = context.activeID();
-	        var data = { targets: [], nopes: [] };
-
-	        entities.forEach(function(node) {
-	            if (activeID === node.id) { return; }   // draw no target on the activeID
-
-	            var vertexType = svgPassiveVertex(node, graph, activeID);
-	            if (vertexType !== 0) {     // passive or adjacent - allow to connect
-	                data.targets.push({
-	                    type: 'Feature',
-	                    id: node.id,
-	                    properties: {
-	                        target: true,
-	                        entity: node
-	                    },
-	                    geometry: node.asGeoJSON()
-	                });
-	            } else {
-	                data.nopes.push({
-	                    type: 'Feature',
-	                    id: node.id + '-nope',
-	                    properties: {
-	                        nope: true,
-	                        target: true,
-	                        entity: node
-	                    },
-	                    geometry: node.asGeoJSON()
-	                });
-	            }
-	        });
+	  function getService() {
+	    if (services.osm && !_osmService) {
+	      _osmService = services.osm;
 
-	        // Targets allow hover and vertex snapping
-	        var targets = selection.selectAll('.vertex.target-allowed')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(data.targets, function key(d) { return d.id; });
-
-	        // exit
-	        targets.exit()
-	            .remove();
-
-	        // enter/update
-	        targets.enter()
-	            .append('circle')
-	            .attr('r', function(d) {
-	                return _radii[d.id]
-	                  || radiuses.shadow[3];
-	            })
-	            .merge(targets)
-	            .attr('class', function(d) {
-	                return 'node vertex target target-allowed '
-	                + targetClass + d.id;
-	            })
-	            .attr('transform', getTransform);
-
-
-	        // NOPE
-	        var nopes = selection.selectAll('.vertex.target-nope')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(data.nopes, function key(d) { return d.id; });
-
-	        // exit
-	        nopes.exit()
-	            .remove();
-
-	        // enter/update
-	        nopes.enter()
-	            .append('circle')
-	            .attr('r', function(d) { return (_radii[d.properties.entity.id] || radiuses.shadow[3]); })
-	            .merge(nopes)
-	            .attr('class', function(d) { return 'node vertex target target-nope ' + nopeClass + d.id; })
-	            .attr('transform', getTransform);
-	    }
-
-
-	    // Points can also render as vertices:
-	    // 1. in wireframe mode or
-	    // 2. at higher zooms if they have a direction
-	    function renderAsVertex(entity, graph, wireframe, zoom) {
-	        var geometry = entity.geometry(graph);
-	        return geometry === 'vertex' || (geometry === 'point' && (
-	            wireframe || (zoom >= 18 && entity.directions(graph, projection).length)
-	        ));
-	    }
-
-
-	    function isEditedNode(node, base, head) {
-	        var baseNode = base.entities[node.id];
-	        var headNode = head.entities[node.id];
-	        return !headNode ||
-	            !baseNode ||
-	            !fastDeepEqual(headNode.tags, baseNode.tags) ||
-	            !fastDeepEqual(headNode.loc, baseNode.loc);
-	    }
-
-
-	    function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
-	        var results = {};
-
-	        var seenIds = {};
-
-	        function addChildVertices(entity) {
-
-	            // avoid redunant work and infinite recursion of circular relations
-	            if (seenIds[entity.id]) { return; }
-	            seenIds[entity.id] = true;
-
-	            var geometry = entity.geometry(graph);
-	            if (!context.features().isHiddenFeature(entity, graph, geometry)) {
-	                var i;
-	                if (entity.type === 'way') {
-	                    for (i = 0; i < entity.nodes.length; i++) {
-	                        var child = graph.hasEntity(entity.nodes[i]);
-	                        if (child) {
-	                            addChildVertices(child);
-	                        }
-	                    }
-	                } else if (entity.type === 'relation') {
-	                    for (i = 0; i < entity.members.length; i++) {
-	                        var member = graph.hasEntity(entity.members[i].id);
-	                        if (member) {
-	                            addChildVertices(member);
-	                        }
-	                    }
-	                } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
-	                    results[entity.id] = entity;
-	                }
-	            }
-	        }
+	      _osmService.on('loadedNotes', throttledRedraw);
+	    } else if (!services.osm && _osmService) {
+	      _osmService = null;
+	    }
 
-	        ids.forEach(function(id) {
-	            var entity = graph.hasEntity(id);
-	            if (!entity) { return; }
+	    return _osmService;
+	  } // Show the notes
 
-	            if (entity.type === 'node') {
-	                if (renderAsVertex(entity, graph, wireframe, zoom)) {
-	                    results[entity.id] = entity;
-	                    graph.parentWays(entity).forEach(function(entity) {
-	                        addChildVertices(entity);
-	                    });
-	                }
-	            } else {  // way, relation
-	                addChildVertices(entity);
-	            }
-	        });
 
-	        return results;
+	  function editOn() {
+	    if (!_notesVisible) {
+	      _notesVisible = true;
+	      drawLayer.style('display', 'block');
 	    }
+	  } // Immediately remove the notes and their touch targets
 
 
-	    function drawVertices(selection, graph, entities, filter, extent, fullRedraw) {
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var visualDiff = context.surface().classed('highlight-edited');
-	        var zoom = geoScaleToZoom(projection.scale());
-	        var mode = context.mode();
-	        var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
-	        var base = context.history().base();
-
-	        var drawLayer = selection.selectAll('.layer-osm.points .points-group.vertices');
-	        var touchLayer = selection.selectAll('.layer-touch.points');
-
-	        if (fullRedraw) {
-	            _currPersistent = {};
-	            _radii = {};
-	        }
-
-	        // Collect important vertices from the `entities` list..
-	        // (during a paritial redraw, it will not contain everything)
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-	            var geometry = entity.geometry(graph);
-	            var keep = false;
-
-	            // a point that looks like a vertex..
-	            if ((geometry === 'point') && renderAsVertex(entity, graph, wireframe, zoom)) {
-	                _currPersistent[entity.id] = entity;
-	                keep = true;
-
-	            // a vertex of some importance..
-	            } else if (geometry === 'vertex' &&
-	                (entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph)
-	                || (visualDiff && isEditedNode(entity, base, graph)))) {
-	                _currPersistent[entity.id] = entity;
-	                keep = true;
-	            }
+	  function editOff() {
+	    if (_notesVisible) {
+	      _notesVisible = false;
+	      drawLayer.style('display', 'none');
+	      drawLayer.selectAll('.note').remove();
+	      touchLayer.selectAll('.note').remove();
+	    }
+	  } // Enable the layer.  This shows the notes and transitions them to visible.
 
-	            // whatever this is, it's not a persistent vertex..
-	            if (!keep && !fullRedraw) {
-	                delete _currPersistent[entity.id];
-	            }
-	        }
 
-	        // 3 sets of vertices to consider:
-	        var sets = {
-	            persistent: _currPersistent,  // persistent = important vertices (render always)
-	            selected: _currSelected,      // selected + siblings of selected (render always)
-	            hovered: _currHover           // hovered + siblings of hovered (render only in draw modes)
-	        };
+	  function layerOn() {
+	    editOn();
+	    drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+	      dispatch.call('change');
+	    });
+	  } // Disable the layer.  This transitions the layer invisible and then hides the notes.
 
-	        var all = Object.assign({}, (isMoving ? _currHover : {}), _currSelected, _currPersistent);
 
-	        // Draw the vertices..
-	        // The filter function controls the scope of what objects d3 will touch (exit/enter/update)
-	        // Adjust the filter function to expand the scope beyond whatever entities were passed in.
-	        var filterRendered = function(d) {
-	            return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
-	        };
-	        drawLayer
-	            .call(draw, graph, currentVisible(all), sets, filterRendered);
+	  function layerOff() {
+	    throttledRedraw.cancel();
+	    drawLayer.interrupt();
+	    touchLayer.selectAll('.note').remove();
+	    drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+	      editOff();
+	      dispatch.call('change');
+	    });
+	  } // Update the note markers
 
-	        // Draw touch targets..
-	        // When drawing, render all targets (not just those affected by a partial redraw)
-	        var filterTouch = function(d) {
-	            return isMoving ? true : filterRendered(d);
-	        };
-	        touchLayer
-	            .call(drawTargets, graph, currentVisible(all), filterTouch);
 
+	  function updateMarkers() {
+	    if (!_notesVisible || !_notesEnabled) return;
+	    var service = getService();
+	    var selectedID = context.selectedNoteID();
+	    var data = service ? service.notes(projection) : [];
+	    var getTransform = svgPointTransform(projection); // Draw markers..
 
-	        function currentVisible(which) {
-	            return Object.keys(which)
-	                .map(graph.hasEntity, graph)     // the current version of this entity
-	                .filter(function (entity) { return entity && entity.intersects(extent, graph); });
-	        }
-	    }
+	    var notes = drawLayer.selectAll('.note').data(data, function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
+	    notes.exit().remove(); // enter
 
-	    // partial redraw - only update the selected items..
-	    drawVertices.drawSelected = function(selection, graph, extent) {
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
+	    var notesEnter = notes.enter().append('g').attr('class', function (d) {
+	      return 'note note-' + d.id + ' ' + d.status;
+	    }).classed('new', function (d) {
+	      return d.id < 0;
+	    });
+	    notesEnter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
+	    notesEnter.append('path').call(markerPath, 'shadow');
+	    notesEnter.append('use').attr('class', 'note-fill').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').attr('xlink:href', '#iD-icon-note');
+	    notesEnter.selectAll('.icon-annotation').data(function (d) {
+	      return [d];
+	    }).enter().append('use').attr('class', 'icon-annotation').attr('width', '10px').attr('height', '10px').attr('x', '-3px').attr('y', '-19px').attr('xlink:href', function (d) {
+	      if (d.id < 0) return '#iD-icon-plus';
+	      if (d.status === 'open') return '#iD-icon-close';
+	      return '#iD-icon-apply';
+	    }); // update
+
+	    notes.merge(notesEnter).sort(sortY).classed('selected', function (d) {
+	      var mode = context.mode();
+	      var isMoving = mode && mode.id === 'drag-note'; // no shadows when dragging
+
+	      return !isMoving && d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
+
+	    if (touchLayer.empty()) return;
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var targets = touchLayer.selectAll('.note').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	        _prevSelected = _currSelected || {};
-	        if (context.map().isInWideSelection()) {
-	            _currSelected = {};
-	            context.selectedIDs().forEach(function(id) {
-	                var entity = graph.hasEntity(id);
-	                if (!entity) { return; }
+	    targets.exit().remove(); // enter/update
 
-	                if (entity.type === 'node') {
-	                    if (renderAsVertex(entity, graph, wireframe, zoom)) {
-	                        _currSelected[entity.id] = entity;
-	                    }
-	                }
-	            });
+	    targets.enter().append('rect').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').merge(targets).sort(sortY).attr('class', function (d) {
+	      var newClass = d.id < 0 ? 'new' : '';
+	      return 'note target note-' + d.id + ' ' + fillClass + newClass;
+	    }).attr('transform', getTransform);
 
-	        } else {
-	            _currSelected = getSiblingAndChildVertices(context.selectedIDs(), graph, wireframe, zoom);
-	        }
+	    function sortY(a, b) {
+	      if (a.id === selectedID) return 1;
+	      if (b.id === selectedID) return -1;
+	      return b.loc[1] - a.loc[1];
+	    }
+	  } // Draw the notes layer and schedule loading notes and updating markers.
 
-	        // note that drawVertices will add `_currSelected` automatically if needed..
-	        var filter = function(d) { return d.id in _prevSelected; };
-	        drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
-	    };
 
+	  function drawNotes(selection) {
+	    var service = getService();
+	    var surface = context.surface();
 
-	    // partial redraw - only update the hovered items..
-	    drawVertices.drawHover = function(selection, graph, target, extent) {
-	        if (target === _currHoverTarget) { return; }  // continue only if something changed
+	    if (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+	    }
 
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
+	    drawLayer = selection.selectAll('.layer-notes').data(service ? [0] : []);
+	    drawLayer.exit().remove();
+	    drawLayer = drawLayer.enter().append('g').attr('class', 'layer-notes').style('display', _notesEnabled ? 'block' : 'none').merge(drawLayer);
 
-	        _prevHover = _currHover || {};
-	        _currHoverTarget = target;
-	        var entity = target && target.properties && target.properties.entity;
+	    if (_notesEnabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadNotes(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
+	    }
+	  } // Toggles the layer on and off
 
-	        if (entity) {
-	            _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
-	        } else {
-	            _currHover = {};
-	        }
 
-	        // note that drawVertices will add `_currHover` automatically if needed..
-	        var filter = function(d) { return d.id in _prevHover; };
-	        drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
-	    };
+	  drawNotes.enabled = function (val) {
+	    if (!arguments.length) return _notesEnabled;
+	    _notesEnabled = val;
 
-	    return drawVertices;
-	}
+	    if (_notesEnabled) {
+	      layerOn();
+	    } else {
+	      layerOff();
 
-	function utilBindOnce(target, type, listener, capture) {
-	    var typeOnce = type + '.once';
-	    function one() {
-	        target.on(typeOnce, null);
-	        listener.apply(this, arguments);
+	      if (context.selectedNoteID()) {
+	        context.enter(modeBrowse(context));
+	      }
 	    }
-	    target.on(typeOnce, one, capture);
-	    return this;
-	}
 
-	// Adapted from d3-zoom to handle pointer events.
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	// Ignore right-click, since that should open the context menu.
-	function defaultFilter$2() {
-	  return !event.ctrlKey && !event.button;
+	  return drawNotes;
 	}
 
-	function defaultExtent$1() {
-	  var e = this;
-	  if (e instanceof SVGElement) {
-	    e = e.ownerSVGElement || e;
-	    if (e.hasAttribute('viewBox')) {
-	      e = e.viewBox.baseVal;
-	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
-	    }
-	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+	function svgTouch() {
+	  function drawTouch(selection) {
+	    selection.selectAll('.layer-touch').data(['areas', 'lines', 'points', 'turns', 'markers']).enter().append('g').attr('class', function (d) {
+	      return 'layer-touch ' + d;
+	    });
 	  }
-	  return [[0, 0], [e.clientWidth, e.clientHeight]];
+
+	  return drawTouch;
 	}
 
-	function defaultWheelDelta$1() {
-	  return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002);
+	function refresh(selection, node) {
+	  var cr = node.getBoundingClientRect();
+	  var prop = [cr.width, cr.height];
+	  selection.property('__dimensions__', prop);
+	  return prop;
 	}
 
-	function defaultConstrain$1(transform, extent, translateExtent) {
-	  var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
-	      dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
-	      dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
-	      dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
-	  return transform.translate(
-	    dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
-	    dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
-	  );
+	function utilGetDimensions(selection, force) {
+	  if (!selection || selection.empty()) {
+	    return [0, 0];
+	  }
+
+	  var node = selection.node(),
+	      cached = selection.property('__dimensions__');
+	  return !cached || force ? refresh(selection, node) : cached;
 	}
+	function utilSetDimensions(selection, dimensions) {
+	  if (!selection || selection.empty()) {
+	    return selection;
+	  }
 
-	function utilZoomPan() {
-	  var filter = defaultFilter$2,
-	      extent = defaultExtent$1,
-	      constrain = defaultConstrain$1,
-	      wheelDelta = defaultWheelDelta$1,
-	      scaleExtent = [0, Infinity],
-	      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
-	      interpolate = interpolateZoom,
-	      listeners = dispatch('start', 'zoom', 'end'),
-	      _wheelDelay = 150,
-	      _transform = identity$2,
-	      _activeGesture;
+	  var node = selection.node();
 
-	  function zoom(selection) {
-	    selection
-	        .on('pointerdown.zoom', pointerdown)
-	        .on('wheel.zoom', wheeled)
-	        .style('touch-action', 'none')
-	        .style('-webkit-tap-highlight-color', 'rgba(0,0,0,0)');
+	  if (dimensions === null) {
+	    refresh(selection, node);
+	    return selection;
+	  }
 
-	    select(window)
-	        .on('pointermove.zoompan', pointermove)
-	        .on('pointerup.zoompan pointercancel.zoompan', pointerup);
+	  return selection.property('__dimensions__', [dimensions[0], dimensions[1]]).attr('width', dimensions[0]).attr('height', dimensions[1]);
+	}
+
+	function svgLayers(projection, context) {
+	  var dispatch = dispatch$8('change');
+	  var svg = select(null);
+	  var _layers = [{
+	    id: 'osm',
+	    layer: svgOsm(projection, context, dispatch)
+	  }, {
+	    id: 'notes',
+	    layer: svgNotes(projection, context, dispatch)
+	  }, {
+	    id: 'data',
+	    layer: svgData(projection, context, dispatch)
+	  }, {
+	    id: 'keepRight',
+	    layer: svgKeepRight(projection, context, dispatch)
+	  }, {
+	    id: 'improveOSM',
+	    layer: svgImproveOSM(projection, context, dispatch)
+	  }, {
+	    id: 'osmose',
+	    layer: svgOsmose(projection, context, dispatch)
+	  }, {
+	    id: 'streetside',
+	    layer: svgStreetside(projection, context, dispatch)
+	  }, {
+	    id: 'mapillary',
+	    layer: svgMapillaryImages(projection, context, dispatch)
+	  }, {
+	    id: 'mapillary-position',
+	    layer: svgMapillaryPosition(projection, context)
+	  }, {
+	    id: 'mapillary-map-features',
+	    layer: svgMapillaryMapFeatures(projection, context, dispatch)
+	  }, {
+	    id: 'mapillary-signs',
+	    layer: svgMapillarySigns(projection, context, dispatch)
+	  }, {
+	    id: 'kartaview',
+	    layer: svgKartaviewImages(projection, context, dispatch)
+	  }, {
+	    id: 'debug',
+	    layer: svgDebug(projection, context)
+	  }, {
+	    id: 'geolocate',
+	    layer: svgGeolocate(projection)
+	  }, {
+	    id: 'touch',
+	    layer: svgTouch()
+	  }];
+
+	  function drawLayers(selection) {
+	    svg = selection.selectAll('.surface').data([0]);
+	    svg = svg.enter().append('svg').attr('class', 'surface').merge(svg);
+	    var defs = svg.selectAll('.surface-defs').data([0]);
+	    defs.enter().append('defs').attr('class', 'surface-defs');
+	    var groups = svg.selectAll('.data-layer').data(_layers);
+	    groups.exit().remove();
+	    groups.enter().append('g').attr('class', function (d) {
+	      return 'data-layer ' + d.id;
+	    }).merge(groups).each(function (d) {
+	      select(this).call(d.layer);
+	    });
 	  }
 
-	  zoom.transform = function(collection, transform, point) {
-	    var selection = collection.selection ? collection.selection() : collection;
-	    if (collection !== selection) {
-	      schedule(collection, transform, point);
-	    } else {
-	      selection.interrupt().each(function() {
-	        gesture(this, arguments)
-	            .start()
-	            .zoom(null, typeof transform === 'function' ? transform.apply(this, arguments) : transform)
-	            .end();
-	      });
-	    }
+	  drawLayers.all = function () {
+	    return _layers;
 	  };
 
-	  zoom.scaleBy = function(selection, k, p) {
-	    zoom.scaleTo(selection, function() {
-	      var k0 = _transform.k,
-	          k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
-	      return k0 * k1;
-	    }, p);
+	  drawLayers.layer = function (id) {
+	    var obj = _layers.find(function (o) {
+	      return o.id === id;
+	    });
+
+	    return obj && obj.layer;
 	  };
 
-	  zoom.scaleTo = function(selection, k, p) {
-	    zoom.transform(selection, function() {
-	      var e = extent.apply(this, arguments),
-	          t0 = _transform,
-	          p0 = p == null ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p,
-	          p1 = t0.invert(p0),
-	          k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
-	      return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
-	    }, p);
+	  drawLayers.only = function (what) {
+	    var arr = [].concat(what);
+
+	    var all = _layers.map(function (layer) {
+	      return layer.id;
+	    });
+
+	    return drawLayers.remove(utilArrayDifference(all, arr));
 	  };
 
-	  zoom.translateBy = function(selection, x, y) {
-	    zoom.transform(selection, function() {
-	      return constrain(_transform.translate(
-	        typeof x === 'function' ? x.apply(this, arguments) : x,
-	        typeof y === 'function' ? y.apply(this, arguments) : y
-	      ), extent.apply(this, arguments), translateExtent);
+	  drawLayers.remove = function (what) {
+	    var arr = [].concat(what);
+	    arr.forEach(function (id) {
+	      _layers = _layers.filter(function (o) {
+	        return o.id !== id;
+	      });
 	    });
+	    dispatch.call('change');
+	    return this;
 	  };
 
-	  zoom.translateTo = function(selection, x, y, p) {
-	    zoom.transform(selection, function() {
-	      var e = extent.apply(this, arguments),
-	          t = _transform,
-	          p0 = p == null ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p;
-	      return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(
-	        typeof x === 'function' ? -x.apply(this, arguments) : -x,
-	        typeof y === 'function' ? -y.apply(this, arguments) : -y
-	      ), e, translateExtent);
-	    }, p);
+	  drawLayers.add = function (what) {
+	    var arr = [].concat(what);
+	    arr.forEach(function (obj) {
+	      if ('id' in obj && 'layer' in obj) {
+	        _layers.push(obj);
+	      }
+	    });
+	    dispatch.call('change');
+	    return this;
 	  };
 
-	  function scale(transform, k) {
-	    k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
-	    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
-	  }
+	  drawLayers.dimensions = function (val) {
+	    if (!arguments.length) return utilGetDimensions(svg);
+	    utilSetDimensions(svg, val);
+	    return this;
+	  };
 
-	  function translate(transform, p0, p1) {
-	    var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;
-	    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
-	  }
+	  return utilRebind(drawLayers, dispatch, 'on');
+	}
 
-	  function centroid(extent) {
-	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
-	  }
+	function svgLines(projection, context) {
+	  var detected = utilDetect();
+	  var highway_stack = {
+	    motorway: 0,
+	    motorway_link: 1,
+	    trunk: 2,
+	    trunk_link: 3,
+	    primary: 4,
+	    primary_link: 5,
+	    secondary: 6,
+	    tertiary: 7,
+	    unclassified: 8,
+	    residential: 9,
+	    service: 10,
+	    footway: 11
+	  };
+
+	  function drawTargets(selection, graph, entities, filter) {
+	    var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
+	    var getPath = svgPath(projection).geojson;
+	    var activeID = context.activeID();
+	    var base = context.history().base(); // The targets and nopes will be MultiLineString sub-segments of the ways
+
+	    var data = {
+	      targets: [],
+	      nopes: []
+	    };
+	    entities.forEach(function (way) {
+	      var features = svgSegmentWay(way, graph, activeID);
+	      data.targets.push.apply(data.targets, features.passive);
+	      data.nopes.push.apply(data.nopes, features.active);
+	    }); // Targets allow hover and vertex snapping
+
+	    var targetData = data.targets.filter(getPath);
+	    var targets = selection.selectAll('.line.target-allowed').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(targetData, function key(d) {
+	      return d.id;
+	    }); // exit
+
+	    targets.exit().remove();
+
+	    var segmentWasEdited = function segmentWasEdited(d) {
+	      var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
+
+	      if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+	        return false;
+	      }
 
-	  function schedule(transition, transform, point) {
-	    transition
-	        .on('start.zoom', function() { gesture(this, arguments).start(); })
-	        .on('interrupt.zoom end.zoom', function() { gesture(this, arguments).end(); })
-	        .tween('zoom', function() {
-	          var that = this,
-	              args = arguments,
-	              g = gesture(that, args),
-	              e = extent.apply(that, args),
-	              p = point == null ? centroid(e) : typeof point === 'function' ? point.apply(that, args) : point,
-	              w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
-	              a = _transform,
-	              b = typeof transform === 'function' ? transform.apply(that, args) : transform,
-	              i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
-	          return function(t) {
-	            if (t === 1) { t = b; } // Avoid rounding error on end.
-	            else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }
-	            g.zoom(null, t);
-	          };
-	        });
-	  }
+	      return d.properties.nodes.some(function (n) {
+	        return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
+	      });
+	    }; // enter/update
 
-	  function gesture(that, args, clean) {
-	    return (!clean && _activeGesture) || new Gesture(that, args);
-	  }
 
-	  function Gesture(that, args) {
-	    this.that = that;
-	    this.args = args;
-	    this.active = 0;
-	    this.extent = extent.apply(that, args);
+	    targets.enter().append('path').merge(targets).attr('d', getPath).attr('class', function (d) {
+	      return 'way line target target-allowed ' + targetClass + d.id;
+	    }).classed('segment-edited', segmentWasEdited); // NOPE
+
+	    var nopeData = data.nopes.filter(getPath);
+	    var nopes = selection.selectAll('.line.target-nope').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(nopeData, function key(d) {
+	      return d.id;
+	    }); // exit
+
+	    nopes.exit().remove(); // enter/update
+
+	    nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
+	      return 'way line target target-nope ' + nopeClass + d.id;
+	    }).classed('segment-edited', segmentWasEdited);
 	  }
 
-	  Gesture.prototype = {
-	    start: function() {
-	      if (++this.active === 1) {
-	        _activeGesture = this;
-	        this.emit('start');
-	      }
-	      return this;
-	    },
-	    zoom: function(key, transform) {
-	      if (this.mouse && key !== 'mouse') { this.mouse[1] = transform.invert(this.mouse[0]); }
-	      if (this.pointer0 && key !== 'touch') { this.pointer0[1] = transform.invert(this.pointer0[0]); }
-	      if (this.pointer1 && key !== 'touch') { this.pointer1[1] = transform.invert(this.pointer1[0]); }
-	      _transform = transform;
-	      this.emit('zoom');
-	      return this;
-	    },
-	    end: function() {
-	      if (--this.active === 0) {
-	        _activeGesture = null;
-	        this.emit('end');
-	      }
-	      return this;
-	    },
-	    emit: function(type) {
-	      customEvent(new ZoomEvent(zoom, type, _transform), listeners.apply, listeners, [type, this.that, this.args]);
-	    }
-	  };
+	  function drawLines(selection, graph, entities, filter) {
+	    var base = context.history().base();
 
-	  function wheeled() {
-	    if (!filter.apply(this, arguments)) { return; }
-	    var g = gesture(this, arguments),
-	        t = _transform,
-	        k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
-	        p = utilFastMouse(this)(event);
+	    function waystack(a, b) {
+	      var selected = context.selectedIDs();
+	      var scoreA = selected.indexOf(a.id) !== -1 ? 20 : 0;
+	      var scoreB = selected.indexOf(b.id) !== -1 ? 20 : 0;
 
-	    // If the mouse is in the same location as before, reuse it.
-	    // If there were recent wheel events, reset the wheel idle timeout.
-	    if (g.wheel) {
-	      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
-	        g.mouse[1] = t.invert(g.mouse[0] = p);
+	      if (a.tags.highway) {
+	        scoreA -= highway_stack[a.tags.highway];
 	      }
-	      clearTimeout(g.wheel);
 
-	    // Otherwise, capture the mouse point and location at the start.
-	    } else {
-	      g.mouse = [p, t.invert(p)];
-	      interrupt(this);
-	      g.start();
+	      if (b.tags.highway) {
+	        scoreB -= highway_stack[b.tags.highway];
+	      }
+
+	      return scoreA - scoreB;
 	    }
 
-	    event.preventDefault();
-	    event.stopImmediatePropagation();
-	    g.wheel = setTimeout(wheelidled, _wheelDelay);
-	    g.zoom('mouse', constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
+	    function drawLineGroup(selection, klass, isSelected) {
+	      // Note: Don't add `.selected` class in draw modes
+	      var mode = context.mode();
+	      var isDrawing = mode && /^draw/.test(mode.id);
+	      var selectedClass = !isDrawing && isSelected ? 'selected ' : '';
+	      var lines = selection.selectAll('path').filter(filter).data(getPathData(isSelected), osmEntity.key);
+	      lines.exit().remove(); // Optimization: Call expensive TagClasses only on enter selection. This
+	      // works because osmEntity.key is defined to include the entity v attribute.
 
-	    function wheelidled() {
-	      g.wheel = null;
-	      g.end();
-	    }
-	  }
+	      lines.enter().append('path').attr('class', function (d) {
+	        var prefix = 'way line'; // if this line isn't styled by its own tags
 
-	  var _downPointerIDs = new Set();
-	  var _pointerLocGetter;
+	        if (!d.hasInterestingTags()) {
+	          var parentRelations = graph.parentRelations(d);
+	          var parentMultipolygons = parentRelations.filter(function (relation) {
+	            return relation.isMultipolygon();
+	          }); // and if it's a member of at least one multipolygon relation
 
-	  function pointerdown() {
-	    _downPointerIDs.add(event.pointerId);
+	          if (parentMultipolygons.length > 0 && // and only multipolygon relations
+	          parentRelations.length === parentMultipolygons.length) {
+	            // then fudge the classes to style this as an area edge
+	            prefix = 'relation area';
+	          }
+	        }
 
-	    if (!filter.apply(this, arguments)) { return; }
+	        var oldMPClass = oldMultiPolygonOuters[d.id] ? 'old-multipolygon ' : '';
+	        return prefix + ' ' + klass + ' ' + selectedClass + oldMPClass + d.id;
+	      }).classed('added', function (d) {
+	        return !base.entities[d.id];
+	      }).classed('geometry-edited', function (d) {
+	        return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
+	      }).classed('retagged', function (d) {
+	        return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+	      }).call(svgTagClasses()).merge(lines).sort(waystack).attr('d', getPath).call(svgTagClasses().tags(svgRelationMemberTags(graph)));
+	      return selection;
+	    }
 
-	    var g = gesture(this, arguments, _downPointerIDs.size === 1);
-	    var started;
+	    function getPathData(isSelected) {
+	      return function () {
+	        var layer = this.parentNode.__data__;
+	        var data = pathdata[layer] || [];
+	        return data.filter(function (d) {
+	          if (isSelected) {
+	            return context.selectedIDs().indexOf(d.id) !== -1;
+	          } else {
+	            return context.selectedIDs().indexOf(d.id) === -1;
+	          }
+	        });
+	      };
+	    }
 
-	    event.stopImmediatePropagation();
-	    _pointerLocGetter = utilFastMouse(this);
-	    var loc = _pointerLocGetter(event);
-	    var p = [loc, _transform.invert(loc), event.pointerId];
-	    if (!g.pointer0) {
-	       g.pointer0 = p;
-	       started = true;
+	    function addMarkers(layergroup, pathclass, groupclass, groupdata, marker) {
+	      var markergroup = layergroup.selectAll('g.' + groupclass).data([pathclass]);
+	      markergroup = markergroup.enter().append('g').attr('class', groupclass).merge(markergroup);
+	      var markers = markergroup.selectAll('path').filter(filter).data(function data() {
+	        return groupdata[this.parentNode.__data__] || [];
+	      }, function key(d) {
+	        return [d.id, d.index];
+	      });
+	      markers.exit().remove();
+	      markers = markers.enter().append('path').attr('class', pathclass).merge(markers).attr('marker-mid', marker).attr('d', function (d) {
+	        return d.d;
+	      });
 
-	    } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
-	       g.pointer1 = p;
+	      if (detected.ie) {
+	        markers.each(function () {
+	          this.parentNode.insertBefore(this, this);
+	        });
+	      }
 	    }
 
-	    if (started) {
-	      interrupt(this);
-	      g.start();
+	    var getPath = svgPath(projection, graph);
+	    var ways = [];
+	    var onewaydata = {};
+	    var sideddata = {};
+	    var oldMultiPolygonOuters = {};
+
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      var outer = osmOldMultipolygonOuterMember(entity, graph);
+
+	      if (outer) {
+	        ways.push(entity.mergeTags(outer.tags));
+	        oldMultiPolygonOuters[outer.id] = true;
+	      } else if (entity.geometry(graph) === 'line') {
+	        ways.push(entity);
+	      }
 	    }
-	  }
 
-	  function pointermove() {
-	    if (!_downPointerIDs.has(event.pointerId)) { return; }
+	    ways = ways.filter(getPath);
+	    var pathdata = utilArrayGroupBy(ways, function (way) {
+	      return way.layer();
+	    });
+	    Object.keys(pathdata).forEach(function (k) {
+	      var v = pathdata[k];
+	      var onewayArr = v.filter(function (d) {
+	        return d.isOneWay();
+	      });
+	      var onewaySegments = svgMarkerSegments(projection, graph, 35, function shouldReverse(entity) {
+	        return entity.tags.oneway === '-1';
+	      }, function bothDirections(entity) {
+	        return entity.tags.oneway === 'reversible' || entity.tags.oneway === 'alternating';
+	      });
+	      onewaydata[k] = utilArrayFlatten(onewayArr.map(onewaySegments));
+	      var sidedArr = v.filter(function (d) {
+	        return d.isSided();
+	      });
+	      var sidedSegments = svgMarkerSegments(projection, graph, 30, function shouldReverse() {
+	        return false;
+	      }, function bothDirections() {
+	        return false;
+	      });
+	      sideddata[k] = utilArrayFlatten(sidedArr.map(sidedSegments));
+	    });
+	    var covered = selection.selectAll('.layer-osm.covered'); // under areas
 
-	    if (!_activeGesture || !_pointerLocGetter) { return; }
+	    var uncovered = selection.selectAll('.layer-osm.lines'); // over areas
 
-	    var g = gesture(this, arguments);
+	    var touchLayer = selection.selectAll('.layer-touch.lines'); // Draw lines..
 
-	    var isPointer0 = g.pointer0 && g.pointer0[2] === event.pointerId;
-	    var isPointer1 = !isPointer0 && g.pointer1 && g.pointer1[2] === event.pointerId;
+	    [covered, uncovered].forEach(function (selection) {
+	      var range = selection === covered ? range$1(-10, 0) : range$1(0, 11);
+	      var layergroup = selection.selectAll('g.layergroup').data(range);
+	      layergroup = layergroup.enter().append('g').attr('class', function (d) {
+	        return 'layergroup layer' + String(d);
+	      }).merge(layergroup);
+	      layergroup.selectAll('g.linegroup').data(['shadow', 'casing', 'stroke', 'shadow-highlighted', 'casing-highlighted', 'stroke-highlighted']).enter().append('g').attr('class', function (d) {
+	        return 'linegroup line-' + d;
+	      });
+	      layergroup.selectAll('g.line-shadow').call(drawLineGroup, 'shadow', false);
+	      layergroup.selectAll('g.line-casing').call(drawLineGroup, 'casing', false);
+	      layergroup.selectAll('g.line-stroke').call(drawLineGroup, 'stroke', false);
+	      layergroup.selectAll('g.line-shadow-highlighted').call(drawLineGroup, 'shadow', true);
+	      layergroup.selectAll('g.line-casing-highlighted').call(drawLineGroup, 'casing', true);
+	      layergroup.selectAll('g.line-stroke-highlighted').call(drawLineGroup, 'stroke', true);
+	      addMarkers(layergroup, 'oneway', 'onewaygroup', onewaydata, 'url(#ideditor-oneway-marker)');
+	      addMarkers(layergroup, 'sided', 'sidedgroup', sideddata, function marker(d) {
+	        var category = graph.entity(d.id).sidednessIdentifier();
+	        return 'url(#ideditor-sided-marker-' + category + ')';
+	      });
+	    }); // Draw touch targets..
 
-	    if ((isPointer0 || isPointer1) && 'buttons' in event && !event.buttons) {
-	      // The pointer went up without ending the gesture somehow, e.g.
-	      // a down mouse was moved off the map and released. End it here.
-	      if (g.pointer0) { _downPointerIDs.delete(g.pointer0[2]); }
-	      if (g.pointer1) { _downPointerIDs.delete(g.pointer1[2]); }
-	      g.end();
-	      return;
-	    }
+	    touchLayer.call(drawTargets, graph, ways, filter);
+	  }
 
-	    event.preventDefault();
-	    event.stopImmediatePropagation();
+	  return drawLines;
+	}
 
-	    var loc = _pointerLocGetter(event);
-	    var t, p, l;
+	function svgMidpoints(projection, context) {
+	  var targetRadius = 8;
 
-	    if (isPointer0) { g.pointer0[0] = loc; }
-	    else if (isPointer1) { g.pointer1[0] = loc; }
+	  function drawTargets(selection, graph, entities, filter) {
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var getTransform = svgPointTransform(projection).geojson;
+	    var data = entities.map(function (midpoint) {
+	      return {
+	        type: 'Feature',
+	        id: midpoint.id,
+	        properties: {
+	          target: true,
+	          entity: midpoint
+	        },
+	        geometry: {
+	          type: 'Point',
+	          coordinates: midpoint.loc
+	        }
+	      };
+	    });
+	    var targets = selection.selectAll('.midpoint.target').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(data, function key(d) {
+	      return d.id;
+	    }); // exit
 
-	    t = _transform;
-	    if (g.pointer1) {
-	      var p0 = g.pointer0[0], l0 = g.pointer0[1],
-	          p1 = g.pointer1[0], l1 = g.pointer1[1],
-	          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
-	          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
-	      t = scale(t, Math.sqrt(dp / dl));
-	      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
-	      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
-	    } else if (g.pointer0) {
-	      p = g.pointer0[0];
-	      l = g.pointer0[1];
-	    }
-	    else { return; }
-	    g.zoom('touch', constrain(translate(t, p, l), g.extent, translateExtent));
+	    targets.exit().remove(); // enter/update
+
+	    targets.enter().append('circle').attr('r', targetRadius).merge(targets).attr('class', function (d) {
+	      return 'node midpoint target ' + fillClass + d.id;
+	    }).attr('transform', getTransform);
 	  }
 
-	  function pointerup() {
-	    if (!_downPointerIDs.has(event.pointerId)) { return; }
+	  function drawMidpoints(selection, graph, entities, filter, extent) {
+	    var drawLayer = selection.selectAll('.layer-osm.points .points-group.midpoints');
+	    var touchLayer = selection.selectAll('.layer-touch.points');
+	    var mode = context.mode();
 
-	    _downPointerIDs.delete(event.pointerId);
+	    if (mode && mode.id !== 'select' || !context.map().withinEditableZoom()) {
+	      drawLayer.selectAll('.midpoint').remove();
+	      touchLayer.selectAll('.midpoint.target').remove();
+	      return;
+	    }
 
-	    if (!_activeGesture) { return; }
+	    var poly = extent.polygon();
+	    var midpoints = {};
 
-	    var g = gesture(this, arguments);
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (entity.type !== 'way') continue;
+	      if (!filter(entity)) continue;
+	      if (context.selectedIDs().indexOf(entity.id) < 0) continue;
+	      var nodes = graph.childNodes(entity);
 
-	    event.stopImmediatePropagation();
+	      for (var j = 0; j < nodes.length - 1; j++) {
+	        var a = nodes[j];
+	        var b = nodes[j + 1];
+	        var id = [a.id, b.id].sort().join('-');
 
-	    if (g.pointer0 && g.pointer0[2] === event.pointerId) { delete g.pointer0; }
-	    else if (g.pointer1 && g.pointer1[2] === event.pointerId) { delete g.pointer1; }
+	        if (midpoints[id]) {
+	          midpoints[id].parents.push(entity);
+	        } else if (geoVecLength(projection(a.loc), projection(b.loc)) > 40) {
+	          var point = geoVecInterp(a.loc, b.loc, 0.5);
+	          var loc = null;
 
-	    if (g.pointer1 && !g.pointer0) {
-	      g.pointer0 = g.pointer1;
-	      delete g.pointer1;
+	          if (extent.intersects(point)) {
+	            loc = point;
+	          } else {
+	            for (var k = 0; k < 4; k++) {
+	              point = geoLineIntersection([a.loc, b.loc], [poly[k], poly[k + 1]]);
+
+	              if (point && geoVecLength(projection(a.loc), projection(point)) > 20 && geoVecLength(projection(b.loc), projection(point)) > 20) {
+	                loc = point;
+	                break;
+	              }
+	            }
+	          }
+
+	          if (loc) {
+	            midpoints[id] = {
+	              type: 'midpoint',
+	              id: id,
+	              loc: loc,
+	              edge: [a.id, b.id],
+	              parents: [entity]
+	            };
+	          }
+	        }
+	      }
 	    }
-	    if (g.pointer0) { g.pointer0[1] = _transform.invert(g.pointer0[0]); }
-	    else {
-	      g.end();
+
+	    function midpointFilter(d) {
+	      if (midpoints[d.id]) return true;
+
+	      for (var i = 0; i < d.parents.length; i++) {
+	        if (filter(d.parents[i])) {
+	          return true;
+	        }
+	      }
+
+	      return false;
 	    }
-	  }
 
-	  zoom.wheelDelta = function(_) {
-	    return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
-	  };
+	    var groups = drawLayer.selectAll('.midpoint').filter(midpointFilter).data(Object.values(midpoints), function (d) {
+	      return d.id;
+	    });
+	    groups.exit().remove();
+	    var enter = groups.enter().insert('g', ':first-child').attr('class', 'midpoint');
+	    enter.append('polygon').attr('points', '-6,8 10,0 -6,-8').attr('class', 'shadow');
+	    enter.append('polygon').attr('points', '-3,4 5,0 -3,-4').attr('class', 'fill');
+	    groups = groups.merge(enter).attr('transform', function (d) {
+	      var translate = svgPointTransform(projection);
+	      var a = graph.entity(d.edge[0]);
+	      var b = graph.entity(d.edge[1]);
+	      var angle = geoAngle(a, b, projection) * (180 / Math.PI);
+	      return translate(d) + ' rotate(' + angle + ')';
+	    }).call(svgTagClasses().tags(function (d) {
+	      return d.parents[0].tags;
+	    })); // Propagate data bindings.
 
-	  zoom.filter = function(_) {
-	    return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
-	  };
+	    groups.select('polygon.shadow');
+	    groups.select('polygon.fill'); // Draw touch targets..
 
-	  zoom.extent = function(_) {
-	    return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
-	  };
+	    touchLayer.call(drawTargets, graph, Object.values(midpoints), midpointFilter);
+	  }
 
-	  zoom.scaleExtent = function(_) {
-	    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
-	  };
+	  return drawMidpoints;
+	}
 
-	  zoom.translateExtent = function(_) {
-	    return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
-	  };
+	function svgPoints(projection, context) {
+	  function markerPath(selection, klass) {
+	    selection.attr('class', klass).attr('transform', 'translate(-8, -23)').attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+	  }
 
-	  zoom.constrain = function(_) {
-	    return arguments.length ? (constrain = _, zoom) : constrain;
-	  };
+	  function sortY(a, b) {
+	    return b.loc[1] - a.loc[1];
+	  } // Avoid exit/enter if we're just moving stuff around.
+	  // The node will get a new version but we only need to run the update selection.
 
-	  zoom.interpolate = function(_) {
-	    return arguments.length ? (interpolate = _, zoom) : interpolate;
-	  };
 
-	  zoom._transform = function(_) {
-	    return arguments.length ? (_transform = _, zoom) : _transform;
-	  };
+	  function fastEntityKey(d) {
+	    var mode = context.mode();
+	    var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
+	    return isMoving ? d.id : osmEntity.key(d);
+	  }
 
-	  zoom.on = function() {
-	    var value = listeners.on.apply(listeners, arguments);
-	    return value === listeners ? zoom : value;
-	  };
+	  function drawTargets(selection, graph, entities, filter) {
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var getTransform = svgPointTransform(projection).geojson;
+	    var activeID = context.activeID();
+	    var data = [];
+	    entities.forEach(function (node) {
+	      if (activeID === node.id) return; // draw no target on the activeID
 
-	  return zoom;
+	      data.push({
+	        type: 'Feature',
+	        id: node.id,
+	        properties: {
+	          target: true,
+	          entity: node
+	        },
+	        geometry: node.asGeoJSON()
+	      });
+	    });
+	    var targets = selection.selectAll('.point.target').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(data, function key(d) {
+	      return d.id;
+	    }); // exit
+
+	    targets.exit().remove(); // enter/update
+
+	    targets.enter().append('rect').attr('x', -10).attr('y', -26).attr('width', 20).attr('height', 30).merge(targets).attr('class', function (d) {
+	      return 'node point target ' + fillClass + d.id;
+	    }).attr('transform', getTransform);
+	  }
+
+	  function drawPoints(selection, graph, entities, filter) {
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    var base = context.history().base(); // Points with a direction will render as vertices at higher zooms..
+
+	    function renderAsPoint(entity) {
+	      return entity.geometry(graph) === 'point' && !(zoom >= 18 && entity.directions(graph, projection).length);
+	    } // All points will render as vertices in wireframe mode too..
+
+
+	    var points = wireframe ? [] : entities.filter(renderAsPoint);
+	    points.sort(sortY);
+	    var drawLayer = selection.selectAll('.layer-osm.points .points-group.points');
+	    var touchLayer = selection.selectAll('.layer-touch.points'); // Draw points..
+
+	    var groups = drawLayer.selectAll('g.point').filter(filter).data(points, fastEntityKey);
+	    groups.exit().remove();
+	    var enter = groups.enter().append('g').attr('class', function (d) {
+	      return 'node point ' + d.id;
+	    }).order();
+	    enter.append('path').call(markerPath, 'shadow');
+	    enter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
+	    enter.append('path').call(markerPath, 'stroke');
+	    enter.append('use').attr('transform', 'translate(-5, -19)').attr('class', 'icon').attr('width', '11px').attr('height', '11px');
+	    groups = groups.merge(enter).attr('transform', svgPointTransform(projection)).classed('added', function (d) {
+	      return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
+	    }).classed('moved', function (d) {
+	      return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
+	    }).classed('retagged', function (d) {
+	      return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+	    }).call(svgTagClasses());
+	    groups.select('.shadow'); // propagate bound data
+
+	    groups.select('.stroke'); // propagate bound data
+
+	    groups.select('.icon') // propagate bound data
+	    .attr('xlink:href', function (entity) {
+	      var preset = _mainPresetIndex.match(entity, graph);
+	      var picon = preset && preset.icon;
+
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return '#' + picon + (isMaki ? '-11' : '');
+	      }
+	    }); // Draw touch targets..
+
+	    touchLayer.call(drawTargets, graph, points, filter);
+	  }
+
+	  return drawPoints;
 	}
 
-	// A custom double-click / double-tap event detector that works on touch devices
-	// if pointer events are supported. Falls back to default `dblclick` event.
-	function utilDoubleUp() {
+	function svgTurns(projection, context) {
+	  function icon(turn) {
+	    var u = turn.u ? '-u' : '';
+	    if (turn.no) return '#iD-turn-no' + u;
+	    if (turn.only) return '#iD-turn-only' + u;
+	    return '#iD-turn-yes' + u;
+	  }
 
-	    var dispatch$1 = dispatch('doubleUp');
+	  function drawTurns(selection, graph, turns) {
+	    function turnTransform(d) {
+	      var pxRadius = 50;
+	      var toWay = graph.entity(d.to.way);
+	      var toPoints = graph.childNodes(toWay).map(function (n) {
+	        return n.loc;
+	      }).map(projection);
+	      var toLength = geoPathLength(toPoints);
+	      var mid = toLength / 2; // midpoint of destination way
 
-	    var _maxTimespan = 500; // milliseconds
-	    var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
-	    var _pointer; // object representing the pointer that could trigger double up
+	      var toNode = graph.entity(d.to.node);
+	      var toVertex = graph.entity(d.to.vertex);
+	      var a = geoAngle(toVertex, toNode, projection);
+	      var o = projection(toVertex.loc);
+	      var r = d.u ? 0 // u-turn: no radius
+	      : !toWay.__via ? pxRadius // leaf way: put marker at pxRadius
+	      : Math.min(mid, pxRadius); // via way: prefer pxRadius, fallback to mid for very short ways
 
-	    function pointerIsValidFor(loc) {
-	        // second pointerup must occur within a small timeframe after the first pointerdown
-	        return new Date().getTime() - _pointer.startTime <= _maxTimespan &&
-	            // all pointer events must occur within a small distance of the first pointerdown
-	            geoVecLength(_pointer.startLoc, loc) <= _maxDistance;
+	      return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' + 'rotate(' + a * 180 / Math.PI + ')';
 	    }
 
-	    function pointerdown() {
+	    var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
+	    var touchLayer = selection.selectAll('.layer-touch.turns'); // Draw turns..
 
-	        // ignore right-click
-	        if (event.ctrlKey || event.button === 2) { return; }
+	    var groups = drawLayer.selectAll('g.turn').data(turns, function (d) {
+	      return d.key;
+	    }); // exit
 
-	        var loc = [event.clientX, event.clientY];
+	    groups.exit().remove(); // enter
 
-	        // Don't rely on pointerId here since it can change between pointerdown
-	        // events on touch devices
-	        if (_pointer && !pointerIsValidFor(loc)) {
-	            // if this pointer is no longer valid, clear it so another can be started
-	            _pointer = undefined;
-	        }
+	    var groupsEnter = groups.enter().append('g').attr('class', function (d) {
+	      return 'turn ' + d.key;
+	    });
+	    var turnsEnter = groupsEnter.filter(function (d) {
+	      return !d.u;
+	    });
+	    turnsEnter.append('rect').attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
+	    turnsEnter.append('use').attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
+	    var uEnter = groupsEnter.filter(function (d) {
+	      return d.u;
+	    });
+	    uEnter.append('circle').attr('r', '16');
+	    uEnter.append('use').attr('transform', 'translate(-16, -16)').attr('width', '32').attr('height', '32'); // update
 
-	        if (!_pointer) {
-	            _pointer = {
-	                startLoc: loc,
-	                startTime: new Date().getTime(),
-	                upCount: 0,
-	                pointerId: event.pointerId
-	            };
-	        } else { // double down
-	            _pointer.pointerId = event.pointerId;
-	        }
-	    }
+	    groups = groups.merge(groupsEnter).attr('opacity', function (d) {
+	      return d.direct === false ? '0.7' : null;
+	    }).attr('transform', turnTransform);
+	    groups.select('use').attr('xlink:href', icon);
+	    groups.select('rect'); // propagate bound data
 
-	    function pointerup() {
+	    groups.select('circle'); // propagate bound data
+	    // Draw touch targets..
 
-	        // ignore right-click
-	        if (event.ctrlKey || event.button === 2) { return; }
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    groups = touchLayer.selectAll('g.turn').data(turns, function (d) {
+	      return d.key;
+	    }); // exit
 
-	        if (!_pointer || _pointer.pointerId !== event.pointerId) { return; }
+	    groups.exit().remove(); // enter
 
-	        _pointer.upCount += 1;
+	    groupsEnter = groups.enter().append('g').attr('class', function (d) {
+	      return 'turn ' + d.key;
+	    });
+	    turnsEnter = groupsEnter.filter(function (d) {
+	      return !d.u;
+	    });
+	    turnsEnter.append('rect').attr('class', 'target ' + fillClass).attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
+	    uEnter = groupsEnter.filter(function (d) {
+	      return d.u;
+	    });
+	    uEnter.append('circle').attr('class', 'target ' + fillClass).attr('r', '16'); // update
 
-	        if (_pointer.upCount === 2) { // double up!
-	            var loc = [event.clientX, event.clientY];
-	            if (pointerIsValidFor(loc)) {
-	                var locInThis = utilFastMouse(this)(event);
-	                dispatch$1.call('doubleUp', this, locInThis);
-	            }
-	            // clear the pointer info in any case
-	            _pointer = undefined;
-	        }
-	    }
+	    groups = groups.merge(groupsEnter).attr('transform', turnTransform);
+	    groups.select('rect'); // propagate bound data
 
-	    function doubleUp(selection) {
-	        if ('PointerEvent' in window) {
-	            // dblclick isn't well supported on touch devices so manually use
-	            // pointer events if they're available
-	            selection
-	                .on('pointerdown.doubleUp', pointerdown)
-	                .on('pointerup.doubleUp', pointerup);
-	        } else {
-	            // fallback to dblclick
-	            selection
-	                .on('dblclick.doubleUp', function() {
-	                    dispatch$1.call('doubleUp', this, utilFastMouse(this)(event));
-	                });
-	        }
-	    }
+	    groups.select('circle'); // propagate bound data
 
-	    doubleUp.off = function(selection) {
-	        selection
-	            .on('pointerdown.doubleUp', null)
-	            .on('pointerup.doubleUp', null)
-	            .on('dblclick.doubleUp', null);
-	    };
+	    return this;
+	  }
 
-	    return utilRebind(doubleUp, dispatch$1, 'on');
+	  return drawTurns;
 	}
 
-	// constants
-	var TILESIZE = 256;
-	var minZoom = 2;
-	var maxZoom = 24;
-	var kMin = geoZoomToScale(minZoom, TILESIZE);
-	var kMax = geoZoomToScale(maxZoom, TILESIZE);
+	function svgVertices(projection, context) {
+	  var radiuses = {
+	    //       z16-, z17,   z18+,  w/icon
+	    shadow: [6, 7.5, 7.5, 12],
+	    stroke: [2.5, 3.5, 3.5, 8],
+	    fill: [1, 1.5, 1.5, 1.5]
+	  };
 
-	function clamp(num, min, max) {
-	    return Math.max(min, Math.min(num, max));
-	}
+	  var _currHoverTarget;
 
+	  var _currPersistent = {};
+	  var _currHover = {};
+	  var _prevHover = {};
+	  var _currSelected = {};
+	  var _prevSelected = {};
+	  var _radii = {};
 
-	function rendererMap(context) {
-	    var dispatch$1 = dispatch(
-	        'move', 'drawn',
-	        'crossEditableZoom', 'hitMinZoom',
-	        'changeHighlighting', 'changeAreaFill'
-	    );
-	    var projection = context.projection;
-	    var curtainProjection = context.curtainProjection;
-	    var drawLayers;
-	    var drawPoints;
-	    var drawVertices;
-	    var drawLines;
-	    var drawAreas;
-	    var drawMidpoints;
-	    var drawLabels;
-
-	    var _selection = select(null);
-	    var supersurface = select(null);
-	    var wrapper = select(null);
-	    var surface = select(null);
-
-	    var _dimensions = [1, 1];
-	    var _dblClickZoomEnabled = true;
-	    var _redrawEnabled = true;
-	    var _gestureTransformStart;
-	    var _transformStart = projection.transform();
-	    var _transformLast;
-	    var _isTransformed = false;
-	    var _minzoom = 0;
-	    var _getMouseCoords;
-	    var _lastPointerEvent;
-	    var _lastWithinEditableZoom;
-
-	    // whether a pointerdown event started the zoom
-	    var _pointerDown = false;
-
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-	    // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
-	    var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
-
-	    var _zoomerPanner = _zoomerPannerFunction()
-	        .scaleExtent([kMin, kMax])
-	        .interpolate(interpolate)
-	        .filter(zoomEventFilter)
-	        .on('zoom.map', zoomPan)
-	        .on('start.map', function() {
-	            _pointerDown = event.sourceEvent && event.sourceEvent.type === 'pointerdown';
-	        })
-	        .on('end.map', function() {
-	            _pointerDown = false;
-	        });
-	    var _doubleUpHandler = utilDoubleUp();
-
-	    var scheduleRedraw = throttle(redraw, 750);
-	    // var isRedrawScheduled = false;
-	    // var pendingRedrawCall;
-	    // function scheduleRedraw() {
-	    //     // Only schedule the redraw if one has not already been set.
-	    //     if (isRedrawScheduled) return;
-	    //     isRedrawScheduled = true;
-	    //     var that = this;
-	    //     var args = arguments;
-	    //     pendingRedrawCall = window.requestIdleCallback(function () {
-	    //         // Reset the boolean so future redraws can be set.
-	    //         isRedrawScheduled = false;
-	    //         redraw.apply(that, args);
-	    //     }, { timeout: 1400 });
-	    // }
+	  function sortY(a, b) {
+	    return b.loc[1] - a.loc[1];
+	  } // Avoid exit/enter if we're just moving stuff around.
+	  // The node will get a new version but we only need to run the update selection.
+
+
+	  function fastEntityKey(d) {
+	    var mode = context.mode();
+	    var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
+	    return isMoving ? d.id : osmEntity.key(d);
+	  }
+
+	  function draw(selection, graph, vertices, sets, filter) {
+	    sets = sets || {
+	      selected: {},
+	      important: {},
+	      hovered: {}
+	    };
+	    var icons = {};
+	    var directions = {};
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    var z = zoom < 17 ? 0 : zoom < 18 ? 1 : 2;
+	    var activeID = context.activeID();
+	    var base = context.history().base();
+
+	    function getIcon(d) {
+	      // always check latest entity, as fastEntityKey avoids enter/exit now
+	      var entity = graph.entity(d.id);
+	      if (entity.id in icons) return icons[entity.id];
+	      icons[entity.id] = entity.hasInterestingTags() && _mainPresetIndex.match(entity, graph).icon;
+	      return icons[entity.id];
+	    } // memoize directions results, return false for empty arrays (for use in filter)
+
+
+	    function getDirections(entity) {
+	      if (entity.id in directions) return directions[entity.id];
+	      var angles = entity.directions(graph, projection);
+	      directions[entity.id] = angles.length ? angles : false;
+	      return angles;
+	    }
+
+	    function updateAttributes(selection) {
+	      ['shadow', 'stroke', 'fill'].forEach(function (klass) {
+	        var rads = radiuses[klass];
+	        selection.selectAll('.' + klass).each(function (entity) {
+	          var i = z && getIcon(entity);
+	          var r = rads[i ? 3 : z]; // slightly increase the size of unconnected endpoints #3775
+
+	          if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
+	            r += 1.5;
+	          }
+
+	          if (klass === 'shadow') {
+	            // remember this value, so we don't need to
+	            _radii[entity.id] = r; // recompute it when we draw the touch targets
+	          }
 
-	    function cancelPendingRedraw() {
-	        scheduleRedraw.cancel();
-	        // isRedrawScheduled = false;
-	        // window.cancelIdleCallback(pendingRedrawCall);
+	          select(this).attr('r', r).attr('visibility', i && klass === 'fill' ? 'hidden' : null);
+	        });
+	      });
 	    }
 
+	    vertices.sort(sortY);
+	    var groups = selection.selectAll('g.vertex').filter(filter).data(vertices, fastEntityKey); // exit
 
-	    function map(selection) {
-	        _selection = selection;
+	    groups.exit().remove(); // enter
 
-	        context
-	            .on('change.map', immediateRedraw);
+	    var enter = groups.enter().append('g').attr('class', function (d) {
+	      return 'node vertex ' + d.id;
+	    }).order();
+	    enter.append('circle').attr('class', 'shadow');
+	    enter.append('circle').attr('class', 'stroke'); // Vertices with tags get a fill.
 
-	        var osm = context.connection();
-	        if (osm) {
-	            osm.on('change.map', immediateRedraw);
-	        }
+	    enter.filter(function (d) {
+	      return d.hasInterestingTags();
+	    }).append('circle').attr('class', 'fill'); // update
 
-	        function didUndoOrRedo(targetTransform) {
-	            var mode = context.mode().id;
-	            if (mode !== 'browse' && mode !== 'select') { return; }
-	            if (targetTransform) {
-	                map.transformEase(targetTransform);
-	            }
-	        }
+	    groups = groups.merge(enter).attr('transform', svgPointTransform(projection)).classed('sibling', function (d) {
+	      return d.id in sets.selected;
+	    }).classed('shared', function (d) {
+	      return graph.isShared(d);
+	    }).classed('endpoint', function (d) {
+	      return d.isEndpoint(graph);
+	    }).classed('added', function (d) {
+	      return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
+	    }).classed('moved', function (d) {
+	      return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
+	    }).classed('retagged', function (d) {
+	      return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+	    }).call(updateAttributes); // Vertices with icons get a `use`.
 
-	        context.history()
-	            .on('merge.map', function() { scheduleRedraw(); })
-	            .on('change.map', immediateRedraw)
-	            .on('undone.map', function(stack, fromStack) {
-	                didUndoOrRedo(fromStack.transform);
-	            })
-	            .on('redone.map', function(stack) {
-	                didUndoOrRedo(stack.transform);
-	            });
+	    var iconUse = groups.selectAll('.icon').data(function data(d) {
+	      return zoom >= 17 && getIcon(d) ? [d] : [];
+	    }, fastEntityKey); // exit
 
-	        context.background()
-	            .on('change.map', immediateRedraw);
+	    iconUse.exit().remove(); // enter
 
-	        context.features()
-	            .on('redraw.map', immediateRedraw);
+	    iconUse.enter().append('use').attr('class', 'icon').attr('width', '11px').attr('height', '11px').attr('transform', 'translate(-5.5, -5.5)').attr('xlink:href', function (d) {
+	      var picon = getIcon(d);
+	      var isMaki = /^maki-/.test(picon);
+	      return '#' + picon + (isMaki ? '-11' : '');
+	    }); // Vertices with directions get viewfields
 
-	        drawLayers
-	            .on('change.map', function() {
-	                context.background().updateImagery();
-	                immediateRedraw();
-	            });
+	    var dgroups = groups.selectAll('.viewfieldgroup').data(function data(d) {
+	      return zoom >= 18 && getDirections(d) ? [d] : [];
+	    }, fastEntityKey); // exit
 
-	        selection
-	            .on('wheel.map mousewheel.map', function() {
-	                // disable swipe-to-navigate browser pages on trackpad/magic mouse – #5552
-	                event.preventDefault();
-	            })
-	            .call(_zoomerPanner)
-	            .call(_zoomerPanner.transform, projection.transform())
-	            .on('dblclick.zoom', null); // override d3-zoom dblclick handling
-
-	        map.supersurface = supersurface = selection.append('div')
-	            .attr('class', 'supersurface')
-	            .call(utilSetTransform, 0, 0);
-
-	        // Need a wrapper div because Opera can't cope with an absolutely positioned
-	        // SVG element: http://bl.ocks.org/jfirebaugh/6fbfbd922552bf776c16
-	        wrapper = supersurface
-	            .append('div')
-	            .attr('class', 'layer layer-data');
-
-	        map.surface = surface = wrapper
-	            .call(drawLayers)
-	            .selectAll('.surface');
-
-	        surface
-	            .call(drawLabels.observe)
-	            .call(_doubleUpHandler)
-	            .on(_pointerPrefix + 'down.zoom', function() {
-	                _lastPointerEvent = event;
-	                if (event.button === 2) {
-	                    event.stopPropagation();
-	                }
-	            }, true)
-	            .on(_pointerPrefix + 'up.zoom', function() {
-	                _lastPointerEvent = event;
-	                if (resetTransform()) {
-	                    immediateRedraw();
-	                }
-	            })
-	            .on(_pointerPrefix + 'move.map', function() {
-	                _lastPointerEvent = event;
-	            })
-	            .on(_pointerPrefix + 'over.vertices', function() {
-	                if (map.editableDataEnabled() && !_isTransformed) {
-	                    var hover = event.target.__data__;
-	                    surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
-	                    dispatch$1.call('drawn', this, { full: false });
-	                }
-	            })
-	            .on(_pointerPrefix + 'out.vertices', function() {
-	                if (map.editableDataEnabled() && !_isTransformed) {
-	                    var hover = event.relatedTarget && event.relatedTarget.__data__;
-	                    surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
-	                    dispatch$1.call('drawn', this, { full: false });
-	                }
-	            });
+	    dgroups.exit().remove(); // enter/update
 
-	        var detected = utilDetect();
+	    dgroups = dgroups.enter().insert('g', '.shadow').attr('class', 'viewfieldgroup').merge(dgroups);
+	    var viewfields = dgroups.selectAll('.viewfield').data(getDirections, function key(d) {
+	      return osmEntity.key(d);
+	    }); // exit
 
-	        // only WebKit supports gesture events
-	        if ('GestureEvent' in window &&
-	            // Listening for gesture events on iOS 13.4+ breaks double-tapping,
-	            // but we only need to do this on desktop Safari anyway. – #7694
-	            !detected.isMobileWebKit) {
+	    viewfields.exit().remove(); // enter/update
 
-	            // Desktop Safari sends gesture events for multitouch trackpad pinches.
-	            // We can listen for these and translate them into map zooms.
-	            surface
-	                .on('gesturestart.surface', function() {
-	                    event.preventDefault();
-	                    _gestureTransformStart = projection.transform();
-	                })
-	                .on('gesturechange.surface', gestureChange);
-	        }
+	    viewfields.enter().append('path').attr('class', 'viewfield').attr('d', 'M0,0H0').merge(viewfields).attr('marker-start', 'url(#ideditor-viewfield-marker' + (wireframe ? '-wireframe' : '') + ')').attr('transform', function (d) {
+	      return 'rotate(' + d + ')';
+	    });
+	  }
 
-	        // must call after surface init
-	        updateAreaFill();
+	  function drawTargets(selection, graph, entities, filter) {
+	    var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
+	    var getTransform = svgPointTransform(projection).geojson;
+	    var activeID = context.activeID();
+	    var data = {
+	      targets: [],
+	      nopes: []
+	    };
+	    entities.forEach(function (node) {
+	      if (activeID === node.id) return; // draw no target on the activeID
 
-	        _doubleUpHandler.on('doubleUp.map', function(p0) {
-	            if (!_dblClickZoomEnabled) { return; }
+	      var vertexType = svgPassiveVertex(node, graph, activeID);
 
-	            // don't zoom if targeting something other than the map itself
-	            if (typeof event.target.__data__ === 'object' &&
-	                // or area fills
-	                !select(event.target).classed('fill')) { return; }
+	      if (vertexType !== 0) {
+	        // passive or adjacent - allow to connect
+	        data.targets.push({
+	          type: 'Feature',
+	          id: node.id,
+	          properties: {
+	            target: true,
+	            entity: node
+	          },
+	          geometry: node.asGeoJSON()
+	        });
+	      } else {
+	        data.nopes.push({
+	          type: 'Feature',
+	          id: node.id + '-nope',
+	          properties: {
+	            nope: true,
+	            target: true,
+	            entity: node
+	          },
+	          geometry: node.asGeoJSON()
+	        });
+	      }
+	    }); // Targets allow hover and vertex snapping
 
-	            var zoomOut = event.shiftKey;
+	    var targets = selection.selectAll('.vertex.target-allowed').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(data.targets, function key(d) {
+	      return d.id;
+	    }); // exit
 
-	            var t = projection.transform();
+	    targets.exit().remove(); // enter/update
 
-	            var p1 = t.invert(p0);
+	    targets.enter().append('circle').attr('r', function (d) {
+	      return _radii[d.id] || radiuses.shadow[3];
+	    }).merge(targets).attr('class', function (d) {
+	      return 'node vertex target target-allowed ' + targetClass + d.id;
+	    }).attr('transform', getTransform); // NOPE
 
-	            t = t.scale(zoomOut ? 0.5 : 2);
+	    var nopes = selection.selectAll('.vertex.target-nope').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(data.nopes, function key(d) {
+	      return d.id;
+	    }); // exit
 
-	            t.x = p0[0] - p1[0] * t.k;
-	            t.y = p0[1] - p1[1] * t.k;
+	    nopes.exit().remove(); // enter/update
 
-	            map.transformEase(t);
-	        });
+	    nopes.enter().append('circle').attr('r', function (d) {
+	      return _radii[d.properties.entity.id] || radiuses.shadow[3];
+	    }).merge(nopes).attr('class', function (d) {
+	      return 'node vertex target target-nope ' + nopeClass + d.id;
+	    }).attr('transform', getTransform);
+	  } // Points can also render as vertices:
+	  // 1. in wireframe mode or
+	  // 2. at higher zooms if they have a direction
 
-	        context.on('enter.map',  function() {
-	            if (!map.editableDataEnabled(true /* skip zoom check */)) { return; }
-
-	            // redraw immediately any objects affected by a change in selectedIDs.
-	            var graph = context.graph();
-	            var selectedAndParents = {};
-	            context.selectedIDs().forEach(function(id) {
-	                var entity = graph.hasEntity(id);
-	                if (entity) {
-	                    selectedAndParents[entity.id] = entity;
-	                    if (entity.type === 'node') {
-	                        graph.parentWays(entity).forEach(function(parent) {
-	                            selectedAndParents[parent.id] = parent;
-	                        });
-	                    }
-	                }
-	            });
-	            var data = Object.values(selectedAndParents);
-	            var filter = function(d) { return d.id in selectedAndParents; };
 
-	            data = context.features().filter(data, graph);
+	  function renderAsVertex(entity, graph, wireframe, zoom) {
+	    var geometry = entity.geometry(graph);
+	    return geometry === 'vertex' || geometry === 'point' && (wireframe || zoom >= 18 && entity.directions(graph, projection).length);
+	  }
 
-	            surface
-	                .call(drawVertices.drawSelected, graph, map.extent())
-	                .call(drawLines, graph, data, filter)
-	                .call(drawAreas, graph, data, filter)
-	                .call(drawMidpoints, graph, data, filter, map.trimmedExtent());
+	  function isEditedNode(node, base, head) {
+	    var baseNode = base.entities[node.id];
+	    var headNode = head.entities[node.id];
+	    return !headNode || !baseNode || !fastDeepEqual(headNode.tags, baseNode.tags) || !fastDeepEqual(headNode.loc, baseNode.loc);
+	  }
 
-	            dispatch$1.call('drawn', this, { full: false });
+	  function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
+	    var results = {};
+	    var seenIds = {};
 
-	            // redraw everything else later
-	            scheduleRedraw();
-	        });
+	    function addChildVertices(entity) {
+	      // avoid redundant work and infinite recursion of circular relations
+	      if (seenIds[entity.id]) return;
+	      seenIds[entity.id] = true;
+	      var geometry = entity.geometry(graph);
 
-	        map.dimensions(utilGetDimensions(selection));
-	    }
+	      if (!context.features().isHiddenFeature(entity, graph, geometry)) {
+	        var i;
 
+	        if (entity.type === 'way') {
+	          for (i = 0; i < entity.nodes.length; i++) {
+	            var child = graph.hasEntity(entity.nodes[i]);
 
-	    function zoomEventFilter() {
-	        // Fix for #2151, (see also d3/d3-zoom#60, d3/d3-brush#18)
-	        // Intercept `mousedown` and check if there is an orphaned zoom gesture.
-	        // This can happen if a previous `mousedown` occurred without a `mouseup`.
-	        // If we detect this, dispatch `mouseup` to complete the orphaned gesture,
-	        // so that d3-zoom won't stop propagation of new `mousedown` events.
-	        if (event.type === 'mousedown') {
-	            var hasOrphan = false;
-	            var listeners = window.__on;
-	            for (var i = 0; i < listeners.length; i++) {
-	                var listener = listeners[i];
-	                if (listener.name === 'zoom' && listener.type === 'mouseup') {
-	                    hasOrphan = true;
-	                    break;
-	                }
+	            if (child) {
+	              addChildVertices(child);
 	            }
-	            if (hasOrphan) {
-	                var event$1 = window.CustomEvent;
-	                if (event$1) {
-	                    event$1 = new event$1('mouseup');
-	                } else {
-	                    event$1 = window.document.createEvent('Event');
-	                    event$1.initEvent('mouseup', false, false);
-	                }
-	                // Event needs to be dispatched with an event.view property.
-	                event$1.view = window;
-	                window.dispatchEvent(event$1);
+	          }
+	        } else if (entity.type === 'relation') {
+	          for (i = 0; i < entity.members.length; i++) {
+	            var member = graph.hasEntity(entity.members[i].id);
+
+	            if (member) {
+	              addChildVertices(member);
 	            }
+	          }
+	        } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
+	          results[entity.id] = entity;
 	        }
-
-	        return event.button !== 2;   // ignore right clicks
+	      }
 	    }
 
+	    ids.forEach(function (id) {
+	      var entity = graph.hasEntity(id);
+	      if (!entity) return;
 
-	    function pxCenter() {
-	        return [_dimensions[0] / 2, _dimensions[1] / 2];
-	    }
+	      if (entity.type === 'node') {
+	        if (renderAsVertex(entity, graph, wireframe, zoom)) {
+	          results[entity.id] = entity;
+	          graph.parentWays(entity).forEach(function (entity) {
+	            addChildVertices(entity);
+	          });
+	        }
+	      } else {
+	        // way, relation
+	        addChildVertices(entity);
+	      }
+	    });
+	    return results;
+	  }
 
+	  function drawVertices(selection, graph, entities, filter, extent, fullRedraw) {
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var visualDiff = context.surface().classed('highlight-edited');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    var mode = context.mode();
+	    var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
+	    var base = context.history().base();
+	    var drawLayer = selection.selectAll('.layer-osm.points .points-group.vertices');
+	    var touchLayer = selection.selectAll('.layer-touch.points');
+
+	    if (fullRedraw) {
+	      _currPersistent = {};
+	      _radii = {};
+	    } // Collect important vertices from the `entities` list..
+	    // (during a partial redraw, it will not contain everything)
+
+
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      var geometry = entity.geometry(graph);
+	      var keep = false; // a point that looks like a vertex..
+
+	      if (geometry === 'point' && renderAsVertex(entity, graph, wireframe, zoom)) {
+	        _currPersistent[entity.id] = entity;
+	        keep = true; // a vertex of some importance..
+	      } else if (geometry === 'vertex' && (entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || visualDiff && isEditedNode(entity, base, graph))) {
+	        _currPersistent[entity.id] = entity;
+	        keep = true;
+	      } // whatever this is, it's not a persistent vertex..
+
+
+	      if (!keep && !fullRedraw) {
+	        delete _currPersistent[entity.id];
+	      }
+	    } // 3 sets of vertices to consider:
 
-	    function drawEditable(difference, extent) {
-	        var mode = context.mode();
-	        var graph = context.graph();
-	        var features = context.features();
-	        var all = context.history().intersects(map.extent());
-	        var fullRedraw = false;
-	        var data;
-	        var set;
-	        var filter;
-	        var applyFeatureLayerFilters = true;
-
-	        if (map.isInWideSelection()) {
-	            data = [];
-	            utilEntityAndDeepMemberIDs(mode.selectedIDs(), context.graph()).forEach(function(id) {
-	                var entity = context.hasEntity(id);
-	                if (entity) { data.push(entity); }
-	            });
-	            fullRedraw = true;
-	            filter = utilFunctor(true);
-	            // selected features should always be visible, so we can skip filtering
-	            applyFeatureLayerFilters = false;
-
-	        } else if (difference) {
-	            var complete = difference.complete(map.extent());
-	            data = Object.values(complete).filter(Boolean);
-	            set = new Set(Object.keys(complete));
-	            filter = function(d) { return set.has(d.id); };
-	            features.clear(data);
 
-	        } else {
-	            // force a full redraw if gatherStats detects that a feature
-	            // should be auto-hidden (e.g. points or buildings)..
-	            if (features.gatherStats(all, graph, _dimensions)) {
-	                extent = undefined;
-	            }
+	    var sets = {
+	      persistent: _currPersistent,
+	      // persistent = important vertices (render always)
+	      selected: _currSelected,
+	      // selected + siblings of selected (render always)
+	      hovered: _currHover // hovered + siblings of hovered (render only in draw modes)
 
-	            if (extent) {
-	                data = context.history().intersects(map.extent().intersection(extent));
-	                set = new Set(data.map(function(entity) { return entity.id; }));
-	                filter = function(d) { return set.has(d.id); };
+	    };
+	    var all = Object.assign({}, isMoving ? _currHover : {}, _currSelected, _currPersistent); // Draw the vertices..
+	    // The filter function controls the scope of what objects d3 will touch (exit/enter/update)
+	    // Adjust the filter function to expand the scope beyond whatever entities were passed in.
 
-	            } else {
-	                data = all;
-	                fullRedraw = true;
-	                filter = utilFunctor(true);
-	            }
-	        }
+	    var filterRendered = function filterRendered(d) {
+	      return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
+	    };
 
-	        if (applyFeatureLayerFilters) {
-	            data = features.filter(data, graph);
-	        } else {
-	            context.features().resetStats();
-	        }
+	    drawLayer.call(draw, graph, currentVisible(all), sets, filterRendered); // Draw touch targets..
+	    // When drawing, render all targets (not just those affected by a partial redraw)
 
-	        if (mode && mode.id === 'select') {
-	            // update selected vertices - the user might have just double-clicked a way,
-	            // creating a new vertex, triggering a partial redraw without a mode change
-	            surface.call(drawVertices.drawSelected, graph, map.extent());
-	        }
+	    var filterTouch = function filterTouch(d) {
+	      return isMoving ? true : filterRendered(d);
+	    };
 
-	        surface
-	            .call(drawVertices, graph, data, filter, map.extent(), fullRedraw)
-	            .call(drawLines, graph, data, filter)
-	            .call(drawAreas, graph, data, filter)
-	            .call(drawMidpoints, graph, data, filter, map.trimmedExtent())
-	            .call(drawLabels, graph, data, filter, _dimensions, fullRedraw)
-	            .call(drawPoints, graph, data, filter);
+	    touchLayer.call(drawTargets, graph, currentVisible(all), filterTouch);
 
-	        dispatch$1.call('drawn', this, {full: true});
+	    function currentVisible(which) {
+	      return Object.keys(which).map(graph.hasEntity, graph) // the current version of this entity
+	      .filter(function (entity) {
+	        return entity && entity.intersects(extent, graph);
+	      });
 	    }
+	  } // partial redraw - only update the selected items..
 
-	    map.init = function() {
-	        drawLayers = svgLayers(projection, context);
-	        drawPoints = svgPoints(projection, context);
-	        drawVertices = svgVertices(projection, context);
-	        drawLines = svgLines(projection, context);
-	        drawAreas = svgAreas(projection, context);
-	        drawMidpoints = svgMidpoints(projection, context);
-	        drawLabels = svgLabels(projection, context);
-	    };
 
-	    function editOff() {
-	        context.features().resetStats();
-	        surface.selectAll('.layer-osm *').remove();
-	        surface.selectAll('.layer-touch:not(.markers) *').remove();
-
-	        var allowed = {
-	            'browse': true,
-	            'save': true,
-	            'select-note': true,
-	            'select-data': true,
-	            'select-error': true
-	        };
+	  drawVertices.drawSelected = function (selection, graph, extent) {
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    _prevSelected = _currSelected || {};
 
-	        var mode = context.mode();
-	        if (mode && !allowed[mode.id]) {
-	            context.enter(modeBrowse(context));
-	        }
+	    if (context.map().isInWideSelection()) {
+	      _currSelected = {};
+	      context.selectedIDs().forEach(function (id) {
+	        var entity = graph.hasEntity(id);
+	        if (!entity) return;
 
-	        dispatch$1.call('drawn', this, {full: true});
-	    }
+	        if (entity.type === 'node') {
+	          if (renderAsVertex(entity, graph, wireframe, zoom)) {
+	            _currSelected[entity.id] = entity;
+	          }
+	        }
+	      });
+	    } else {
+	      _currSelected = getSiblingAndChildVertices(context.selectedIDs(), graph, wireframe, zoom);
+	    } // note that drawVertices will add `_currSelected` automatically if needed..
 
 
+	    var filter = function filter(d) {
+	      return d.id in _prevSelected;
+	    };
 
+	    drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
+	  }; // partial redraw - only update the hovered items..
 
 
-	    function gestureChange() {
-	        // Remap Safari gesture events to wheel events - #5492
-	        // We want these disabled most places, but enabled for zoom/unzoom on map surface
-	        // https://developer.mozilla.org/en-US/docs/Web/API/GestureEvent
-	        var e = event;
-	        e.preventDefault();
+	  drawVertices.drawHover = function (selection, graph, target, extent) {
+	    if (target === _currHoverTarget) return; // continue only if something changed
 
-	        var props = {
-	            deltaMode: 0,    // dummy values to ignore in zoomPan
-	            deltaY: 1,       // dummy values to ignore in zoomPan
-	            clientX: e.clientX,
-	            clientY: e.clientY,
-	            screenX: e.screenX,
-	            screenY: e.screenY,
-	            x: e.x,
-	            y: e.y
-	        };
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    _prevHover = _currHover || {};
+	    _currHoverTarget = target;
+	    var entity = target && target.properties && target.properties.entity;
 
-	        var e2 = new WheelEvent('wheel', props);
-	        e2._scale = e.scale;         // preserve the original scale
-	        e2._rotation = e.rotation;   // preserve the original rotation
-
-	        _selection.node().dispatchEvent(e2);
-	    }
-
-
-	    function zoomPan(manualEvent) {
-	        var event$1 = (manualEvent || event);
-	        var source = event$1.sourceEvent;
-	        var eventTransform = event$1.transform;
-	        var x = eventTransform.x;
-	        var y = eventTransform.y;
-	        var k = eventTransform.k;
-
-	        // Special handling of 'wheel' events:
-	        // They might be triggered by the user scrolling the mouse wheel,
-	        // or 2-finger pinch/zoom gestures, the transform may need adjustment.
-	        if (source && source.type === 'wheel') {
-
-	            // assume that the gesture is already handled by pointer events
-	            if (_pointerDown) { return; }
-
-	            var detected = utilDetect();
-	            var dX = source.deltaX;
-	            var dY = source.deltaY;
-	            var x2 = x;
-	            var y2 = y;
-	            var k2 = k;
-	            var t0, p0, p1;
-
-	            // Normalize mousewheel scroll speed (Firefox) - #3029
-	            // If wheel delta is provided in LINE units, recalculate it in PIXEL units
-	            // We are essentially redoing the calculations that occur here:
-	            //   https://github.com/d3/d3-zoom/blob/78563a8348aa4133b07cac92e2595c2227ca7cd7/src/zoom.js#L203
-	            // See this for more info:
-	            //   https://github.com/basilfx/normalize-wheel/blob/master/src/normalizeWheel.js
-	            if (source.deltaMode === 1 /* LINE */) {
-	                // Convert from lines to pixels, more if the user is scrolling fast.
-	                // (I made up the exp function to roughly match Firefox to what Chrome does)
-	                // These numbers should be floats, because integers are treated as pan gesture below.
-	                var lines = Math.abs(source.deltaY);
-	                var sign = (source.deltaY > 0) ? 1 : -1;
-	                dY = sign * clamp(
-	                    Math.exp((lines - 1) * 0.75) * 4.000244140625,
-	                    4.000244140625,    // min
-	                    350.000244140625   // max
-	                );
+	    if (entity) {
+	      _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
+	    } else {
+	      _currHover = {};
+	    } // note that drawVertices will add `_currHover` automatically if needed..
 
-	                // On Firefox Windows and Linux we always get +/- the scroll line amount (default 3)
-	                // There doesn't seem to be any scroll accelleration.
-	                // This multiplier increases the speed a little bit - #5512
-	                if (detected.os !== 'mac') {
-	                    dY *= 5;
-	                }
 
-	                // recalculate x2,y2,k2
-	                t0 = _isTransformed ? _transformLast : _transformStart;
-	                p0 = _getMouseCoords(source);
-	                p1 = t0.invert(p0);
-	                k2 = t0.k * Math.pow(2, -dY / 500);
-	                k2 = clamp(k2, kMin, kMax);
-	                x2 = p0[0] - p1[0] * k2;
-	                y2 = p0[1] - p1[1] * k2;
-
-	            // 2 finger map pinch zooming (Safari) - #5492
-	            // These are fake `wheel` events we made from Safari `gesturechange` events..
-	            } else if (source._scale) {
-	                // recalculate x2,y2,k2
-	                t0 = _gestureTransformStart;
-	                p0 = _getMouseCoords(source);
-	                p1 = t0.invert(p0);
-	                k2 = t0.k * source._scale;
-	                k2 = clamp(k2, kMin, kMax);
-	                x2 = p0[0] - p1[0] * k2;
-	                y2 = p0[1] - p1[1] * k2;
-
-	            // 2 finger map pinch zooming (all browsers except Safari) - #5492
-	            // Pinch zooming via the `wheel` event will always have:
-	            // - `ctrlKey = true`
-	            // - `deltaY` is not round integer pixels (ignore `deltaX`)
-	            } else if (source.ctrlKey && !isInteger(dY)) {
-	                dY *= 6;   // slightly scale up whatever the browser gave us
-
-	                // recalculate x2,y2,k2
-	                t0 = _isTransformed ? _transformLast : _transformStart;
-	                p0 = _getMouseCoords(source);
-	                p1 = t0.invert(p0);
-	                k2 = t0.k * Math.pow(2, -dY / 500);
-	                k2 = clamp(k2, kMin, kMax);
-	                x2 = p0[0] - p1[0] * k2;
-	                y2 = p0[1] - p1[1] * k2;
-
-	            // Trackpad scroll zooming with shift or alt/option key down
-	            } else if ((source.altKey || source.shiftKey) && isInteger(dY)) {
-	                // recalculate x2,y2,k2
-	                t0 = _isTransformed ? _transformLast : _transformStart;
-	                p0 = _getMouseCoords(source);
-	                p1 = t0.invert(p0);
-	                k2 = t0.k * Math.pow(2, -dY / 500);
-	                k2 = clamp(k2, kMin, kMax);
-	                x2 = p0[0] - p1[0] * k2;
-	                y2 = p0[1] - p1[1] * k2;
-
-	            // 2 finger map panning (Mac only, all browsers) - #5492, #5512
-	            // Panning via the `wheel` event will always have:
-	            // - `ctrlKey = false`
-	            // - `deltaX`,`deltaY` are round integer pixels
-	            } else if (detected.os === 'mac' && !source.ctrlKey && isInteger(dX) && isInteger(dY)) {
-	                p1 = projection.translate();
-	                x2 = p1[0] - dX;
-	                y2 = p1[1] - dY;
-	                k2 = projection.scale();
-	                k2 = clamp(k2, kMin, kMax);
-	            }
+	    var filter = function filter(d) {
+	      return d.id in _prevHover;
+	    };
 
-	            // something changed - replace the event transform
-	            if (x2 !== x || y2 !== y || k2 !== k) {
-	                x = x2;
-	                y = y2;
-	                k = k2;
-	                eventTransform = identity$2.translate(x2, y2).scale(k2);
-	                if (_zoomerPanner._transform) {
-	                    // utilZoomPan interface
-	                    _zoomerPanner._transform(eventTransform);
-	                } else {
-	                    // d3_zoom interface
-	                    _selection.node().__zoom = eventTransform;
-	                }
-	            }
+	    drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
+	  };
 
-	        }
+	  return drawVertices;
+	}
 
-	        if (_transformStart.x === x &&
-	            _transformStart.y === y &&
-	            _transformStart.k === k) {
-	            return;  // no change
-	        }
+	function utilBindOnce(target, type, listener, capture) {
+	  var typeOnce = type + '.once';
 
-	        var withinEditableZoom = map.withinEditableZoom();
-	        if (_lastWithinEditableZoom !== withinEditableZoom) {
-	            if (_lastWithinEditableZoom !== undefined) {
-	                // notify that the map zoomed in or out over the editable zoom threshold
-	                dispatch$1.call('crossEditableZoom', this, withinEditableZoom);
-	            }
-	            _lastWithinEditableZoom = withinEditableZoom;
-	        }
+	  function one() {
+	    target.on(typeOnce, null);
+	    listener.apply(this, arguments);
+	  }
 
-	        if (geoScaleToZoom(k, TILESIZE) < _minzoom) {
-	            surface.interrupt();
-	            dispatch$1.call('hitMinZoom', this, map);
-	            setCenterZoom(map.center(), context.minEditableZoom(), 0, true);
-	            scheduleRedraw();
-	            dispatch$1.call('move', this, map);
-	            return;
-	        }
+	  target.on(typeOnce, one, capture);
+	  return this;
+	}
 
-	        projection.transform(eventTransform);
+	function defaultFilter(d3_event) {
+	  return !d3_event.ctrlKey && !d3_event.button;
+	}
 
-	        var scale = k / _transformStart.k;
-	        var tX = (x / scale - _transformStart.x) * scale;
-	        var tY = (y / scale - _transformStart.y) * scale;
+	function defaultExtent() {
+	  var e = this;
 
-	        if (context.inIntro()) {
-	            curtainProjection.transform({
-	                x: x - tX,
-	                y: y - tY,
-	                k: k
-	            });
-	        }
+	  if (e instanceof SVGElement) {
+	    e = e.ownerSVGElement || e;
 
-	        if (source) {
-	            _lastPointerEvent = event$1;
-	        }
-	        _isTransformed = true;
-	        _transformLast = eventTransform;
-	        utilSetTransform(supersurface, tX, tY, scale);
-	        scheduleRedraw();
+	    if (e.hasAttribute('viewBox')) {
+	      e = e.viewBox.baseVal;
+	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+	    }
 
-	        dispatch$1.call('move', this, map);
+	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+	  }
 
+	  return [[0, 0], [e.clientWidth, e.clientHeight]];
+	}
 
-	        function isInteger(val) {
-	            return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
-	        }
-	    }
+	function defaultWheelDelta(d3_event) {
+	  return -d3_event.deltaY * (d3_event.deltaMode === 1 ? 0.05 : d3_event.deltaMode ? 1 : 0.002);
+	}
 
+	function defaultConstrain(transform, extent, translateExtent) {
+	  var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
+	      dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
+	      dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
+	      dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
+	  return transform.translate(dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1), dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1));
+	}
 
-	    function resetTransform() {
-	        if (!_isTransformed) { return false; }
+	function utilZoomPan() {
+	  var filter = defaultFilter,
+	      extent = defaultExtent,
+	      constrain = defaultConstrain,
+	      wheelDelta = defaultWheelDelta,
+	      scaleExtent = [0, Infinity],
+	      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
+	      interpolate = interpolateZoom,
+	      dispatch = dispatch$8('start', 'zoom', 'end'),
+	      _wheelDelay = 150,
+	      _transform = identity$2,
+	      _activeGesture;
 
-	        utilSetTransform(supersurface, 0, 0);
-	        _isTransformed = false;
-	        if (context.inIntro()) {
-	            curtainProjection.transform(projection.transform());
-	        }
-	        return true;
-	    }
+	  function zoom(selection) {
+	    selection.on('pointerdown.zoom', pointerdown).on('wheel.zoom', wheeled).style('touch-action', 'none').style('-webkit-tap-highlight-color', 'rgba(0,0,0,0)');
+	    select(window).on('pointermove.zoompan', pointermove).on('pointerup.zoompan pointercancel.zoompan', pointerup);
+	  }
 
+	  zoom.transform = function (collection, transform, point) {
+	    var selection = collection.selection ? collection.selection() : collection;
 
-	    function redraw(difference, extent) {
-	        if (surface.empty() || !_redrawEnabled) { return; }
+	    if (collection !== selection) {
+	      schedule(collection, transform, point);
+	    } else {
+	      selection.interrupt().each(function () {
+	        gesture(this, arguments).start(null).zoom(null, null, typeof transform === 'function' ? transform.apply(this, arguments) : transform).end(null);
+	      });
+	    }
+	  };
 
-	        // If we are in the middle of a zoom/pan, we can't do differenced redraws.
-	        // It would result in artifacts where differenced entities are redrawn with
-	        // one transform and unchanged entities with another.
-	        if (resetTransform()) {
-	            difference = extent = undefined;
-	        }
+	  zoom.scaleBy = function (selection, k, p) {
+	    zoom.scaleTo(selection, function () {
+	      var k0 = _transform.k,
+	          k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
+	      return k0 * k1;
+	    }, p);
+	  };
 
-	        var zoom = map.zoom();
-	        var z = String(~~zoom);
+	  zoom.scaleTo = function (selection, k, p) {
+	    zoom.transform(selection, function () {
+	      var e = extent.apply(this, arguments),
+	          t0 = _transform,
+	          p0 = !p ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p,
+	          p1 = t0.invert(p0),
+	          k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
+	      return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
+	    }, p);
+	  };
 
-	        if (surface.attr('data-zoom') !== z) {
-	            surface.attr('data-zoom', z);
-	        }
+	  zoom.translateBy = function (selection, x, y) {
+	    zoom.transform(selection, function () {
+	      return constrain(_transform.translate(typeof x === 'function' ? x.apply(this, arguments) : x, typeof y === 'function' ? y.apply(this, arguments) : y), extent.apply(this, arguments), translateExtent);
+	    });
+	  };
 
-	        // class surface as `lowzoom` around z17-z18.5 (based on latitude)
-	        var lat = map.center()[1];
-	        var lowzoom = linear$2()
-	            .domain([-60, 0, 60])
-	            .range([17, 18.5, 17])
-	            .clamp(true);
+	  zoom.translateTo = function (selection, x, y, p) {
+	    zoom.transform(selection, function () {
+	      var e = extent.apply(this, arguments),
+	          t = _transform,
+	          p0 = !p ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p;
+	      return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(typeof x === 'function' ? -x.apply(this, arguments) : -x, typeof y === 'function' ? -y.apply(this, arguments) : -y), e, translateExtent);
+	    }, p);
+	  };
 
-	        surface
-	            .classed('low-zoom', zoom <= lowzoom(lat));
+	  function scale(transform, k) {
+	    k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
+	    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
+	  }
 
+	  function translate(transform, p0, p1) {
+	    var x = p0[0] - p1[0] * transform.k,
+	        y = p0[1] - p1[1] * transform.k;
+	    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
+	  }
 
-	        if (!difference) {
-	            supersurface.call(context.background());
-	            wrapper.call(drawLayers);
-	        }
+	  function centroid(extent) {
+	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+	  }
 
-	        // OSM
-	        if (map.editableDataEnabled() || map.isInWideSelection()) {
-	            context.loadTiles(projection);
-	            drawEditable(difference, extent);
+	  function schedule(transition, transform, point) {
+	    transition.on('start.zoom', function () {
+	      gesture(this, arguments).start(null);
+	    }).on('interrupt.zoom end.zoom', function () {
+	      gesture(this, arguments).end(null);
+	    }).tween('zoom', function () {
+	      var that = this,
+	          args = arguments,
+	          g = gesture(that, args),
+	          e = extent.apply(that, args),
+	          p = !point ? centroid(e) : typeof point === 'function' ? point.apply(that, args) : point,
+	          w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
+	          a = _transform,
+	          b = typeof transform === 'function' ? transform.apply(that, args) : transform,
+	          i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
+	      return function (t) {
+	        if (t === 1) {
+	          // Avoid rounding error on end.
+	          t = b;
 	        } else {
-	            editOff();
+	          var l = i(t);
+	          var k = w / l[2];
+	          t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
 	        }
 
-	        _transformStart = projection.transform();
-
-	        return map;
-	    }
-
-
+	        g.zoom(null, null, t);
+	      };
+	    });
+	  }
 
-	    var immediateRedraw = function(difference, extent) {
-	        if (!difference && !extent) { cancelPendingRedraw(); }
-	        redraw(difference, extent);
-	    };
+	  function gesture(that, args, clean) {
+	    return !clean && _activeGesture || new Gesture(that, args);
+	  }
 
+	  function Gesture(that, args) {
+	    this.that = that;
+	    this.args = args;
+	    this.active = 0;
+	    this.extent = extent.apply(that, args);
+	  }
 
-	    map.lastPointerEvent = function() {
-	        return _lastPointerEvent;
-	    };
+	  Gesture.prototype = {
+	    start: function start(d3_event) {
+	      if (++this.active === 1) {
+	        _activeGesture = this;
+	        dispatch.call('start', this, d3_event);
+	      }
 
+	      return this;
+	    },
+	    zoom: function zoom(d3_event, key, transform) {
+	      if (this.mouse && key !== 'mouse') this.mouse[1] = transform.invert(this.mouse[0]);
+	      if (this.pointer0 && key !== 'touch') this.pointer0[1] = transform.invert(this.pointer0[0]);
+	      if (this.pointer1 && key !== 'touch') this.pointer1[1] = transform.invert(this.pointer1[0]);
+	      _transform = transform;
+	      dispatch.call('zoom', this, d3_event, key, transform);
+	      return this;
+	    },
+	    end: function end(d3_event) {
+	      if (--this.active === 0) {
+	        _activeGesture = null;
+	        dispatch.call('end', this, d3_event);
+	      }
 
-	    map.mouse = function() {
-	        var event$1 = _lastPointerEvent || event;
-	        if (event$1) {
-	            var s;
-	            while ((s = event$1.sourceEvent)) { event$1 = s; }
-	            return _getMouseCoords(event$1);
-	        }
-	        return null;
-	    };
+	      return this;
+	    }
+	  };
 
+	  function wheeled(d3_event) {
+	    if (!filter.apply(this, arguments)) return;
+	    var g = gesture(this, arguments),
+	        t = _transform,
+	        k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
+	        p = utilFastMouse(this)(d3_event); // If the mouse is in the same location as before, reuse it.
+	    // If there were recent wheel events, reset the wheel idle timeout.
 
-	    // returns Lng/Lat
-	    map.mouseCoordinates = function() {
-	        var coord = map.mouse() || pxCenter();
-	        return projection.invert(coord);
-	    };
+	    if (g.wheel) {
+	      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
+	        g.mouse[1] = t.invert(g.mouse[0] = p);
+	      }
 
+	      clearTimeout(g.wheel); // Otherwise, capture the mouse point and location at the start.
+	    } else {
+	      g.mouse = [p, t.invert(p)];
+	      interrupt(this);
+	      g.start(d3_event);
+	    }
 
-	    map.dblclickZoomEnable = function(val) {
-	        if (!arguments.length) { return _dblClickZoomEnabled; }
-	        _dblClickZoomEnabled = val;
-	        return map;
-	    };
+	    d3_event.preventDefault();
+	    d3_event.stopImmediatePropagation();
+	    g.wheel = setTimeout(wheelidled, _wheelDelay);
+	    g.zoom(d3_event, 'mouse', constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
 
+	    function wheelidled() {
+	      g.wheel = null;
+	      g.end(d3_event);
+	    }
+	  }
 
-	    map.redrawEnable = function(val) {
-	        if (!arguments.length) { return _redrawEnabled; }
-	        _redrawEnabled = val;
-	        return map;
-	    };
+	  var _downPointerIDs = new Set();
 
+	  var _pointerLocGetter;
 
-	    map.isTransformed = function() {
-	        return _isTransformed;
-	    };
+	  function pointerdown(d3_event) {
+	    _downPointerIDs.add(d3_event.pointerId);
 
+	    if (!filter.apply(this, arguments)) return;
+	    var g = gesture(this, arguments, _downPointerIDs.size === 1);
+	    var started;
+	    d3_event.stopImmediatePropagation();
+	    _pointerLocGetter = utilFastMouse(this);
 
-	    function setTransform(t2, duration, force) {
-	        var t = projection.transform();
-	        if (!force && t2.k === t.k && t2.x === t.x && t2.y === t.y) { return false; }
+	    var loc = _pointerLocGetter(d3_event);
 
-	        if (duration) {
-	            _selection
-	                .transition()
-	                .duration(duration)
-	                .on('start', function() { map.startEase(); })
-	                .call(_zoomerPanner.transform, identity$2.translate(t2.x, t2.y).scale(t2.k));
-	        } else {
-	            projection.transform(t2);
-	            _transformStart = t2;
-	            _selection.call(_zoomerPanner.transform, _transformStart);
-	        }
+	    var p = [loc, _transform.invert(loc), d3_event.pointerId];
 
-	        return true;
+	    if (!g.pointer0) {
+	      g.pointer0 = p;
+	      started = true;
+	    } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
+	      g.pointer1 = p;
 	    }
 
-
-	    function setCenterZoom(loc2, z2, duration, force) {
-	        var c = map.center();
-	        var z = map.zoom();
-	        if (loc2[0] === c[0] && loc2[1] === c[1] && z2 === z && !force) { return false; }
-
-	        var proj = geoRawMercator().transform(projection.transform());  // copy projection
-
-	        var k2 = clamp(geoZoomToScale(z2, TILESIZE), kMin, kMax);
-	        proj.scale(k2);
-
-	        var t = proj.translate();
-	        var point = proj(loc2);
-
-	        var center = pxCenter();
-	        t[0] += center[0] - point[0];
-	        t[1] += center[1] - point[1];
-
-	        return setTransform(identity$2.translate(t[0], t[1]).scale(k2), duration, force);
+	    if (started) {
+	      interrupt(this);
+	      g.start(d3_event);
 	    }
+	  }
 
+	  function pointermove(d3_event) {
+	    if (!_downPointerIDs.has(d3_event.pointerId)) return;
+	    if (!_activeGesture || !_pointerLocGetter) return;
+	    var g = gesture(this, arguments);
+	    var isPointer0 = g.pointer0 && g.pointer0[2] === d3_event.pointerId;
+	    var isPointer1 = !isPointer0 && g.pointer1 && g.pointer1[2] === d3_event.pointerId;
 
-	    map.pan = function(delta, duration) {
-	        var t = projection.translate();
-	        var k = projection.scale();
+	    if ((isPointer0 || isPointer1) && 'buttons' in d3_event && !d3_event.buttons) {
+	      // The pointer went up without ending the gesture somehow, e.g.
+	      // a down mouse was moved off the map and released. End it here.
+	      if (g.pointer0) _downPointerIDs["delete"](g.pointer0[2]);
+	      if (g.pointer1) _downPointerIDs["delete"](g.pointer1[2]);
+	      g.end(d3_event);
+	      return;
+	    }
 
-	        t[0] += delta[0];
-	        t[1] += delta[1];
+	    d3_event.preventDefault();
+	    d3_event.stopImmediatePropagation();
 
-	        if (duration) {
-	            _selection
-	                .transition()
-	                .duration(duration)
-	                .on('start', function() { map.startEase(); })
-	                .call(_zoomerPanner.transform, identity$2.translate(t[0], t[1]).scale(k));
-	        } else {
-	            projection.translate(t);
-	            _transformStart = projection.transform();
-	            _selection.call(_zoomerPanner.transform, _transformStart);
-	            dispatch$1.call('move', this, map);
-	            immediateRedraw();
-	        }
+	    var loc = _pointerLocGetter(d3_event);
 
-	        return map;
-	    };
+	    var t, p, l;
+	    if (isPointer0) g.pointer0[0] = loc;else if (isPointer1) g.pointer1[0] = loc;
+	    t = _transform;
 
+	    if (g.pointer1) {
+	      var p0 = g.pointer0[0],
+	          l0 = g.pointer0[1],
+	          p1 = g.pointer1[0],
+	          l1 = g.pointer1[1],
+	          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
+	          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
+	      t = scale(t, Math.sqrt(dp / dl));
+	      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
+	      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
+	    } else if (g.pointer0) {
+	      p = g.pointer0[0];
+	      l = g.pointer0[1];
+	    } else {
+	      return;
+	    }
 
-	    map.dimensions = function(val) {
-	        if (!arguments.length) { return _dimensions; }
+	    g.zoom(d3_event, 'touch', constrain(translate(t, p, l), g.extent, translateExtent));
+	  }
 
-	        _dimensions = val;
-	        drawLayers.dimensions(_dimensions);
-	        context.background().dimensions(_dimensions);
-	        projection.clipExtent([[0, 0], _dimensions]);
-	        _getMouseCoords = utilFastMouse(supersurface.node());
+	  function pointerup(d3_event) {
+	    if (!_downPointerIDs.has(d3_event.pointerId)) return;
 
-	        scheduleRedraw();
-	        return map;
-	    };
+	    _downPointerIDs["delete"](d3_event.pointerId);
 
+	    if (!_activeGesture) return;
+	    var g = gesture(this, arguments);
+	    d3_event.stopImmediatePropagation();
+	    if (g.pointer0 && g.pointer0[2] === d3_event.pointerId) delete g.pointer0;else if (g.pointer1 && g.pointer1[2] === d3_event.pointerId) delete g.pointer1;
 
-	    function zoomIn(delta) {
-	        setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
+	    if (g.pointer1 && !g.pointer0) {
+	      g.pointer0 = g.pointer1;
+	      delete g.pointer1;
 	    }
 
-	    function zoomOut(delta) {
-	        setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
+	    if (g.pointer0) {
+	      g.pointer0[1] = _transform.invert(g.pointer0[0]);
+	    } else {
+	      g.end(d3_event);
 	    }
+	  }
 
-	    map.zoomIn = function() { zoomIn(1); };
-	    map.zoomInFurther = function() { zoomIn(4); };
-	    map.canZoomIn = function() { return map.zoom() < maxZoom; };
+	  zoom.wheelDelta = function (_) {
+	    return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
+	  };
 
-	    map.zoomOut = function() { zoomOut(1); };
-	    map.zoomOutFurther = function() { zoomOut(4); };
-	    map.canZoomOut = function() { return map.zoom() > minZoom; };
+	  zoom.filter = function (_) {
+	    return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
+	  };
 
-	    map.center = function(loc2) {
-	        if (!arguments.length) {
-	            return projection.invert(pxCenter());
-	        }
+	  zoom.extent = function (_) {
+	    return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+	  };
 
-	        if (setCenterZoom(loc2, map.zoom())) {
-	            dispatch$1.call('move', this, map);
-	        }
+	  zoom.scaleExtent = function (_) {
+	    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+	  };
 
-	        scheduleRedraw();
-	        return map;
-	    };
+	  zoom.translateExtent = function (_) {
+	    return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
+	  };
 
-	    map.unobscuredCenterZoomEase = function(loc, zoom) {
-	        var offset = map.unobscuredOffsetPx();
+	  zoom.constrain = function (_) {
+	    return arguments.length ? (constrain = _, zoom) : constrain;
+	  };
 
-	        var proj = geoRawMercator().transform(projection.transform());  // copy projection
-	        // use the target zoom to calculate the offset center
-	        proj.scale(geoZoomToScale(zoom, TILESIZE));
+	  zoom.interpolate = function (_) {
+	    return arguments.length ? (interpolate = _, zoom) : interpolate;
+	  };
 
-	        var locPx = proj(loc);
-	        var offsetLocPx = [locPx[0] + offset[0], locPx[1] + offset[1]];
-	        var offsetLoc = proj.invert(offsetLocPx);
+	  zoom._transform = function (_) {
+	    return arguments.length ? (_transform = _, zoom) : _transform;
+	  };
 
-	        map.centerZoomEase(offsetLoc, zoom);
-	    };
+	  return utilRebind(zoom, dispatch, 'on');
+	}
 
-	    map.unobscuredOffsetPx = function() {
-	        var openPane = context.container().select('.map-panes .map-pane.shown');
-	        if (!openPane.empty()) {
-	            return [openPane.node().offsetWidth/2, 0];
-	        }
-	        return [0, 0];
-	    };
+	// if pointer events are supported. Falls back to default `dblclick` event.
 
-	    map.zoom = function(z2) {
-	        if (!arguments.length) {
-	            return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
-	        }
+	function utilDoubleUp() {
+	  var dispatch = dispatch$8('doubleUp');
+	  var _maxTimespan = 500; // milliseconds
 
-	        if (z2 < _minzoom) {
-	            surface.interrupt();
-	            dispatch$1.call('hitMinZoom', this, map);
-	            z2 = context.minEditableZoom();
-	        }
+	  var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
 
-	        if (setCenterZoom(map.center(), z2)) {
-	            dispatch$1.call('move', this, map);
-	        }
+	  var _pointer; // object representing the pointer that could trigger double up
 
-	        scheduleRedraw();
-	        return map;
-	    };
 
+	  function pointerIsValidFor(loc) {
+	    // second pointerup must occur within a small timeframe after the first pointerdown
+	    return new Date().getTime() - _pointer.startTime <= _maxTimespan && // all pointer events must occur within a small distance of the first pointerdown
+	    geoVecLength(_pointer.startLoc, loc) <= _maxDistance;
+	  }
 
-	    map.centerZoom = function(loc2, z2) {
-	        if (setCenterZoom(loc2, z2)) {
-	            dispatch$1.call('move', this, map);
-	        }
+	  function pointerdown(d3_event) {
+	    // ignore right-click
+	    if (d3_event.ctrlKey || d3_event.button === 2) return;
+	    var loc = [d3_event.clientX, d3_event.clientY]; // Don't rely on pointerId here since it can change between pointerdown
+	    // events on touch devices
 
-	        scheduleRedraw();
-	        return map;
-	    };
+	    if (_pointer && !pointerIsValidFor(loc)) {
+	      // if this pointer is no longer valid, clear it so another can be started
+	      _pointer = undefined;
+	    }
 
+	    if (!_pointer) {
+	      _pointer = {
+	        startLoc: loc,
+	        startTime: new Date().getTime(),
+	        upCount: 0,
+	        pointerId: d3_event.pointerId
+	      };
+	    } else {
+	      // double down
+	      _pointer.pointerId = d3_event.pointerId;
+	    }
+	  }
 
-	    map.zoomTo = function(entity) {
-	        var extent = entity.extent(context.graph());
-	        if (!isFinite(extent.area())) { return map; }
+	  function pointerup(d3_event) {
+	    // ignore right-click
+	    if (d3_event.ctrlKey || d3_event.button === 2) return;
+	    if (!_pointer || _pointer.pointerId !== d3_event.pointerId) return;
+	    _pointer.upCount += 1;
 
-	        var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
-	        return map.centerZoom(extent.center(), z2);
-	    };
+	    if (_pointer.upCount === 2) {
+	      // double up!
+	      var loc = [d3_event.clientX, d3_event.clientY];
 
+	      if (pointerIsValidFor(loc)) {
+	        var locInThis = utilFastMouse(this)(d3_event);
+	        dispatch.call('doubleUp', this, d3_event, locInThis);
+	      } // clear the pointer info in any case
 
-	    map.centerEase = function(loc2, duration) {
-	        duration = duration || 250;
-	        setCenterZoom(loc2, map.zoom(), duration);
-	        return map;
-	    };
 
+	      _pointer = undefined;
+	    }
+	  }
 
-	    map.zoomEase = function(z2, duration) {
-	        duration = duration || 250;
-	        setCenterZoom(map.center(), z2, duration, false);
-	        return map;
-	    };
+	  function doubleUp(selection) {
+	    if ('PointerEvent' in window) {
+	      // dblclick isn't well supported on touch devices so manually use
+	      // pointer events if they're available
+	      selection.on('pointerdown.doubleUp', pointerdown).on('pointerup.doubleUp', pointerup);
+	    } else {
+	      // fallback to dblclick
+	      selection.on('dblclick.doubleUp', function (d3_event) {
+	        dispatch.call('doubleUp', this, d3_event, utilFastMouse(this)(d3_event));
+	      });
+	    }
+	  }
 
+	  doubleUp.off = function (selection) {
+	    selection.on('pointerdown.doubleUp', null).on('pointerup.doubleUp', null).on('dblclick.doubleUp', null);
+	  };
 
-	    map.centerZoomEase = function(loc2, z2, duration) {
-	        duration = duration || 250;
-	        setCenterZoom(loc2, z2, duration, false);
-	        return map;
-	    };
+	  return utilRebind(doubleUp, dispatch, 'on');
+	}
 
+	var TILESIZE = 256;
+	var minZoom = 2;
+	var maxZoom = 24;
+	var kMin = geoZoomToScale(minZoom, TILESIZE);
+	var kMax = geoZoomToScale(maxZoom, TILESIZE);
 
-	    map.transformEase = function(t2, duration) {
-	        duration = duration || 250;
-	        setTransform(t2, duration, false /* don't force */);
-	        return map;
-	    };
+	function clamp$1(num, min, max) {
+	  return Math.max(min, Math.min(num, max));
+	}
 
+	function rendererMap(context) {
+	  var dispatch = dispatch$8('move', 'drawn', 'crossEditableZoom', 'hitMinZoom', 'changeHighlighting', 'changeAreaFill');
+	  var projection = context.projection;
+	  var curtainProjection = context.curtainProjection;
+	  var drawLayers;
+	  var drawPoints;
+	  var drawVertices;
+	  var drawLines;
+	  var drawAreas;
+	  var drawMidpoints;
+	  var drawLabels;
 
-	    map.zoomToEase = function(obj, duration) {
-	        var extent;
-	        if (Array.isArray(obj)) {
-	            obj.forEach(function(entity) {
-	                var entityExtent = entity.extent(context.graph());
-	                if (!extent) {
-	                    extent = entityExtent;
-	                } else {
-	                    extent = extent.extend(entityExtent);
-	                }
-	            });
-	        } else {
-	            extent = obj.extent(context.graph());
-	        }
-	        if (!isFinite(extent.area())) { return map; }
+	  var _selection = select(null);
 
-	        var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
-	        return map.centerZoomEase(extent.center(), z2, duration);
-	    };
+	  var supersurface = select(null);
+	  var wrapper = select(null);
+	  var surface = select(null);
+	  var _dimensions = [1, 1];
+	  var _dblClickZoomEnabled = true;
+	  var _redrawEnabled = true;
 
+	  var _gestureTransformStart;
 
-	    map.startEase = function() {
-	        utilBindOnce(surface, _pointerPrefix + 'down.ease', function() {
-	            map.cancelEase();
-	        });
-	        return map;
-	    };
+	  var _transformStart = projection.transform();
 
+	  var _transformLast;
 
-	    map.cancelEase = function() {
-	        _selection.interrupt();
-	        return map;
-	    };
+	  var _isTransformed = false;
+	  var _minzoom = 0;
 
+	  var _getMouseCoords;
 
-	    map.extent = function(val) {
-	        if (!arguments.length) {
-	            return new geoExtent(
-	                projection.invert([0, _dimensions[1]]),
-	                projection.invert([_dimensions[0], 0])
-	            );
-	        } else {
-	            var extent = geoExtent(val);
-	            map.centerZoom(extent.center(), map.extentZoom(extent));
-	        }
-	    };
+	  var _lastPointerEvent;
 
+	  var _lastWithinEditableZoom; // whether a pointerdown event started the zoom
 
-	    map.trimmedExtent = function(val) {
-	        if (!arguments.length) {
-	            var headerY = 71;
-	            var footerY = 30;
-	            var pad = 10;
-	            return new geoExtent(
-	                projection.invert([pad, _dimensions[1] - footerY - pad]),
-	                projection.invert([_dimensions[0] - pad, headerY + pad])
-	            );
-	        } else {
-	            var extent = geoExtent(val);
-	            map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
-	        }
-	    };
 
+	  var _pointerDown = false; // use pointer events on supported platforms; fallback to mouse events
 
-	    function calcExtentZoom(extent, dim) {
-	        var tl = projection([extent[0][0], extent[1][1]]);
-	        var br = projection([extent[1][0], extent[0][1]]);
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
 
-	        // Calculate maximum zoom that fits extent
-	        var hFactor = (br[0] - tl[0]) / dim[0];
-	        var vFactor = (br[1] - tl[1]) / dim[1];
-	        var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
-	        var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
-	        var newZoom = map.zoom() - Math.max(hZoomDiff, vZoomDiff);
 
-	        return newZoom;
-	    }
+	  var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
 
+	  var _zoomerPanner = _zoomerPannerFunction().scaleExtent([kMin, kMax]).interpolate(interpolate$1).filter(zoomEventFilter).on('zoom.map', zoomPan).on('start.map', function (d3_event) {
+	    _pointerDown = d3_event && (d3_event.type === 'pointerdown' || d3_event.sourceEvent && d3_event.sourceEvent.type === 'pointerdown');
+	  }).on('end.map', function () {
+	    _pointerDown = false;
+	  });
 
-	    map.extentZoom = function(val) {
-	        return calcExtentZoom(geoExtent(val), _dimensions);
-	    };
+	  var _doubleUpHandler = utilDoubleUp();
+
+	  var scheduleRedraw = throttle(redraw, 750); // var isRedrawScheduled = false;
+	  // var pendingRedrawCall;
+	  // function scheduleRedraw() {
+	  //     // Only schedule the redraw if one has not already been set.
+	  //     if (isRedrawScheduled) return;
+	  //     isRedrawScheduled = true;
+	  //     var that = this;
+	  //     var args = arguments;
+	  //     pendingRedrawCall = window.requestIdleCallback(function () {
+	  //         // Reset the boolean so future redraws can be set.
+	  //         isRedrawScheduled = false;
+	  //         redraw.apply(that, args);
+	  //     }, { timeout: 1400 });
+	  // }
 
 
-	    map.trimmedExtentZoom = function(val) {
-	        var trimY = 120;
-	        var trimX = 40;
-	        var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
-	        return calcExtentZoom(geoExtent(val), trimmed);
-	    };
+	  function cancelPendingRedraw() {
+	    scheduleRedraw.cancel(); // isRedrawScheduled = false;
+	    // window.cancelIdleCallback(pendingRedrawCall);
+	  }
 
+	  function map(selection) {
+	    _selection = selection;
+	    context.on('change.map', immediateRedraw);
+	    var osm = context.connection();
 
-	    map.withinEditableZoom = function() {
-	        return map.zoom() >= context.minEditableZoom();
-	    };
+	    if (osm) {
+	      osm.on('change.map', immediateRedraw);
+	    }
 
+	    function didUndoOrRedo(targetTransform) {
+	      var mode = context.mode().id;
+	      if (mode !== 'browse' && mode !== 'select') return;
 
-	    map.isInWideSelection = function() {
-	        return !map.withinEditableZoom() && context.selectedIDs().length;
-	    };
+	      if (targetTransform) {
+	        map.transformEase(targetTransform);
+	      }
+	    }
 
+	    context.history().on('merge.map', function () {
+	      scheduleRedraw();
+	    }).on('change.map', immediateRedraw).on('undone.map', function (stack, fromStack) {
+	      didUndoOrRedo(fromStack.transform);
+	    }).on('redone.map', function (stack) {
+	      didUndoOrRedo(stack.transform);
+	    });
+	    context.background().on('change.map', immediateRedraw);
+	    context.features().on('redraw.map', immediateRedraw);
+	    drawLayers.on('change.map', function () {
+	      context.background().updateImagery();
+	      immediateRedraw();
+	    });
+	    selection.on('wheel.map mousewheel.map', function (d3_event) {
+	      // disable swipe-to-navigate browser pages on trackpad/magic mouse – #5552
+	      d3_event.preventDefault();
+	    }).call(_zoomerPanner).call(_zoomerPanner.transform, projection.transform()).on('dblclick.zoom', null); // override d3-zoom dblclick handling
 
-	    map.editableDataEnabled = function(skipZoomCheck) {
+	    map.supersurface = supersurface = selection.append('div').attr('class', 'supersurface').call(utilSetTransform, 0, 0); // Need a wrapper div because Opera can't cope with an absolutely positioned
+	    // SVG element: http://bl.ocks.org/jfirebaugh/6fbfbd922552bf776c16
 
-	        var layer = context.layers().layer('osm');
-	        if (!layer || !layer.enabled()) { return false; }
+	    wrapper = supersurface.append('div').attr('class', 'layer layer-data');
+	    map.surface = surface = wrapper.call(drawLayers).selectAll('.surface');
+	    surface.call(drawLabels.observe).call(_doubleUpHandler).on(_pointerPrefix + 'down.zoom', function (d3_event) {
+	      _lastPointerEvent = d3_event;
 
-	        return skipZoomCheck || map.withinEditableZoom();
-	    };
+	      if (d3_event.button === 2) {
+	        d3_event.stopPropagation();
+	      }
+	    }, true).on(_pointerPrefix + 'up.zoom', function (d3_event) {
+	      _lastPointerEvent = d3_event;
 
+	      if (resetTransform()) {
+	        immediateRedraw();
+	      }
+	    }).on(_pointerPrefix + 'move.map', function (d3_event) {
+	      _lastPointerEvent = d3_event;
+	    }).on(_pointerPrefix + 'over.vertices', function (d3_event) {
+	      if (map.editableDataEnabled() && !_isTransformed) {
+	        var hover = d3_event.target.__data__;
+	        surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
+	        dispatch.call('drawn', this, {
+	          full: false
+	        });
+	      }
+	    }).on(_pointerPrefix + 'out.vertices', function (d3_event) {
+	      if (map.editableDataEnabled() && !_isTransformed) {
+	        var hover = d3_event.relatedTarget && d3_event.relatedTarget.__data__;
+	        surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
+	        dispatch.call('drawn', this, {
+	          full: false
+	        });
+	      }
+	    });
+	    var detected = utilDetect(); // only WebKit supports gesture events
+
+	    if ('GestureEvent' in window && // Listening for gesture events on iOS 13.4+ breaks double-tapping,
+	    // but we only need to do this on desktop Safari anyway. – #7694
+	    !detected.isMobileWebKit) {
+	      // Desktop Safari sends gesture events for multitouch trackpad pinches.
+	      // We can listen for these and translate them into map zooms.
+	      surface.on('gesturestart.surface', function (d3_event) {
+	        d3_event.preventDefault();
+	        _gestureTransformStart = projection.transform();
+	      }).on('gesturechange.surface', gestureChange);
+	    } // must call after surface init
+
+
+	    updateAreaFill();
+
+	    _doubleUpHandler.on('doubleUp.map', function (d3_event, p0) {
+	      if (!_dblClickZoomEnabled) return; // don't zoom if targeting something other than the map itself
+
+	      if (_typeof(d3_event.target.__data__) === 'object' && // or area fills
+	      !select(d3_event.target).classed('fill')) return;
+	      var zoomOut = d3_event.shiftKey;
+	      var t = projection.transform();
+	      var p1 = t.invert(p0);
+	      t = t.scale(zoomOut ? 0.5 : 2);
+	      t.x = p0[0] - p1[0] * t.k;
+	      t.y = p0[1] - p1[1] * t.k;
+	      map.transformEase(t);
+	    });
 
-	    map.notesEditable = function() {
-	        var layer = context.layers().layer('notes');
-	        if (!layer || !layer.enabled()) { return false; }
+	    context.on('enter.map', function () {
+	      if (!map.editableDataEnabled(true
+	      /* skip zoom check */
+	      )) return;
+	      if (_isTransformed) return; // redraw immediately any objects affected by a change in selectedIDs.
 
-	        return map.withinEditableZoom();
-	    };
+	      var graph = context.graph();
+	      var selectedAndParents = {};
+	      context.selectedIDs().forEach(function (id) {
+	        var entity = graph.hasEntity(id);
 
+	        if (entity) {
+	          selectedAndParents[entity.id] = entity;
 
-	    map.minzoom = function(val) {
-	        if (!arguments.length) { return _minzoom; }
-	        _minzoom = val;
-	        return map;
-	    };
+	          if (entity.type === 'node') {
+	            graph.parentWays(entity).forEach(function (parent) {
+	              selectedAndParents[parent.id] = parent;
+	            });
+	          }
+	        }
+	      });
+	      var data = Object.values(selectedAndParents);
 
+	      var filter = function filter(d) {
+	        return d.id in selectedAndParents;
+	      };
 
-	    map.toggleHighlightEdited = function() {
-	        surface.classed('highlight-edited', !surface.classed('highlight-edited'));
-	        map.pan([0,0]);  // trigger a redraw
-	        dispatch$1.call('changeHighlighting', this);
-	    };
+	      data = context.features().filter(data, graph);
+	      surface.call(drawVertices.drawSelected, graph, map.extent()).call(drawLines, graph, data, filter).call(drawAreas, graph, data, filter).call(drawMidpoints, graph, data, filter, map.trimmedExtent());
+	      dispatch.call('drawn', this, {
+	        full: false
+	      }); // redraw everything else later
 
+	      scheduleRedraw();
+	    });
+	    map.dimensions(utilGetDimensions(selection));
+	  }
 
-	    map.areaFillOptions = ['wireframe', 'partial', 'full'];
+	  function zoomEventFilter(d3_event) {
+	    // Fix for #2151, (see also d3/d3-zoom#60, d3/d3-brush#18)
+	    // Intercept `mousedown` and check if there is an orphaned zoom gesture.
+	    // This can happen if a previous `mousedown` occurred without a `mouseup`.
+	    // If we detect this, dispatch `mouseup` to complete the orphaned gesture,
+	    // so that d3-zoom won't stop propagation of new `mousedown` events.
+	    if (d3_event.type === 'mousedown') {
+	      var hasOrphan = false;
+	      var listeners = window.__on;
 
-	    map.activeAreaFill = function(val) {
-	        if (!arguments.length) { return corePreferences('area-fill') || 'partial'; }
+	      for (var i = 0; i < listeners.length; i++) {
+	        var listener = listeners[i];
 
-	        corePreferences('area-fill', val);
-	        if (val !== 'wireframe') {
-	            corePreferences('area-fill-toggle', val);
+	        if (listener.name === 'zoom' && listener.type === 'mouseup') {
+	          hasOrphan = true;
+	          break;
 	        }
-	        updateAreaFill();
-	        map.pan([0,0]);  // trigger a redraw
-	        dispatch$1.call('changeAreaFill', this);
-	        return map;
-	    };
-
-	    map.toggleWireframe = function() {
+	      }
 
-	        var activeFill = map.activeAreaFill();
+	      if (hasOrphan) {
+	        var event = window.CustomEvent;
 
-	        if (activeFill === 'wireframe') {
-	            activeFill = corePreferences('area-fill-toggle') || 'partial';
+	        if (event) {
+	          event = new event('mouseup');
 	        } else {
-	            activeFill = 'wireframe';
-	        }
+	          event = window.document.createEvent('Event');
+	          event.initEvent('mouseup', false, false);
+	        } // Event needs to be dispatched with an event.view property.
 
-	        map.activeAreaFill(activeFill);
-	    };
 
-	    function updateAreaFill() {
-	        var activeFill = map.activeAreaFill();
-	        map.areaFillOptions.forEach(function(opt) {
-	            surface.classed('fill-' + opt, Boolean(opt === activeFill));
-	        });
+	        event.view = window;
+	        window.dispatchEvent(event);
+	      }
 	    }
 
+	    return d3_event.button !== 2; // ignore right clicks
+	  }
 
-	    map.layers = function () { return drawLayers; };
-
-
-	    map.doubleUpHandler = function() {
-	        return _doubleUpHandler;
-	    };
+	  function pxCenter() {
+	    return [_dimensions[0] / 2, _dimensions[1] / 2];
+	  }
 
+	  function drawEditable(difference, extent) {
+	    var mode = context.mode();
+	    var graph = context.graph();
+	    var features = context.features();
+	    var all = context.history().intersects(map.extent());
+	    var fullRedraw = false;
+	    var data;
+	    var set;
+	    var filter;
+	    var applyFeatureLayerFilters = true;
+
+	    if (map.isInWideSelection()) {
+	      data = [];
+	      utilEntityAndDeepMemberIDs(mode.selectedIDs(), context.graph()).forEach(function (id) {
+	        var entity = context.hasEntity(id);
+	        if (entity) data.push(entity);
+	      });
+	      fullRedraw = true;
+	      filter = utilFunctor(true); // selected features should always be visible, so we can skip filtering
 
-	    return utilRebind(map, dispatch$1, 'on');
-	}
+	      applyFeatureLayerFilters = false;
+	    } else if (difference) {
+	      var complete = difference.complete(map.extent());
+	      data = Object.values(complete).filter(Boolean);
+	      set = new Set(Object.keys(complete));
 
-	function rendererPhotos(context) {
-	    var dispatch$1 = dispatch('change');
-	    var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'openstreetcam'];
-	    var _allPhotoTypes = ['flat', 'panoramic'];
-	    var _shownPhotoTypes = _allPhotoTypes.slice();   // shallow copy
+	      filter = function filter(d) {
+	        return set.has(d.id);
+	      };
 
-	    function photos() {}
+	      features.clear(data);
+	    } else {
+	      // force a full redraw if gatherStats detects that a feature
+	      // should be auto-hidden (e.g. points or buildings)..
+	      if (features.gatherStats(all, graph, _dimensions)) {
+	        extent = undefined;
+	      }
 
-	    function updateStorage() {
-	        if (window.mocha) { return; }
+	      if (extent) {
+	        data = context.history().intersects(map.extent().intersection(extent));
+	        set = new Set(data.map(function (entity) {
+	          return entity.id;
+	        }));
 
-	        var hash = utilStringQs(window.location.hash);
-	        var enabled = context.layers().all().filter(function(d) {
-	            return _layerIDs.indexOf(d.id) !== -1 && d.layer && d.layer.supported() && d.layer.enabled();
-	        }).map(function(d) {
-	            return d.id;
-	        });
-	        if (enabled.length) {
-	            hash.photo_overlay = enabled.join(',');
-	        } else {
-	            delete hash.photo_overlay;
-	        }
-	        window.location.replace('#' + utilQsString(hash, true));
+	        filter = function filter(d) {
+	          return set.has(d.id);
+	        };
+	      } else {
+	        data = all;
+	        fullRedraw = true;
+	        filter = utilFunctor(true);
+	      }
 	    }
 
-	    photos.overlayLayerIDs = function() {
-	        return _layerIDs;
-	    };
-
-	    photos.allPhotoTypes = function() {
-	        return _allPhotoTypes;
-	    };
+	    if (applyFeatureLayerFilters) {
+	      data = features.filter(data, graph);
+	    } else {
+	      context.features().resetStats();
+	    }
 
-	    function showsLayer(id) {
-	        var layer = context.layers().layer(id);
-	        return layer && layer.supported() && layer.enabled();
+	    if (mode && mode.id === 'select') {
+	      // update selected vertices - the user might have just double-clicked a way,
+	      // creating a new vertex, triggering a partial redraw without a mode change
+	      surface.call(drawVertices.drawSelected, graph, map.extent());
 	    }
 
-	    photos.shouldFilterByPhotoType = function() {
-	        return showsLayer('mapillary') ||
-	            (showsLayer('streetside') && showsLayer('openstreetcam'));
-	    };
+	    surface.call(drawVertices, graph, data, filter, map.extent(), fullRedraw).call(drawLines, graph, data, filter).call(drawAreas, graph, data, filter).call(drawMidpoints, graph, data, filter, map.trimmedExtent()).call(drawLabels, graph, data, filter, _dimensions, fullRedraw).call(drawPoints, graph, data, filter);
+	    dispatch.call('drawn', this, {
+	      full: true
+	    });
+	  }
 
-	    photos.showsPhotoType = function(val) {
-	        if (!photos.shouldFilterByPhotoType()) { return true; }
+	  map.init = function () {
+	    drawLayers = svgLayers(projection, context);
+	    drawPoints = svgPoints(projection, context);
+	    drawVertices = svgVertices(projection, context);
+	    drawLines = svgLines(projection, context);
+	    drawAreas = svgAreas(projection, context);
+	    drawMidpoints = svgMidpoints(projection, context);
+	    drawLabels = svgLabels(projection, context);
+	  };
 
-	        return _shownPhotoTypes.indexOf(val) !== -1;
+	  function editOff() {
+	    context.features().resetStats();
+	    surface.selectAll('.layer-osm *').remove();
+	    surface.selectAll('.layer-touch:not(.markers) *').remove();
+	    var allowed = {
+	      'browse': true,
+	      'save': true,
+	      'select-note': true,
+	      'select-data': true,
+	      'select-error': true
 	    };
+	    var mode = context.mode();
 
-	    photos.showsFlat = function() {
-	        return photos.showsPhotoType('flat');
-	    };
+	    if (mode && !allowed[mode.id]) {
+	      context.enter(modeBrowse(context));
+	    }
 
-	    photos.showsPanoramic = function() {
-	        return photos.showsPhotoType('panoramic');
-	    };
+	    dispatch.call('drawn', this, {
+	      full: true
+	    });
+	  }
 
-	    photos.togglePhotoType = function(val) {
-	        var index = _shownPhotoTypes.indexOf(val);
-	        if (index !== -1) {
-	            _shownPhotoTypes.splice(index, 1);
+	  function gestureChange(d3_event) {
+	    // Remap Safari gesture events to wheel events - #5492
+	    // We want these disabled most places, but enabled for zoom/unzoom on map surface
+	    // https://developer.mozilla.org/en-US/docs/Web/API/GestureEvent
+	    var e = d3_event;
+	    e.preventDefault();
+	    var props = {
+	      deltaMode: 0,
+	      // dummy values to ignore in zoomPan
+	      deltaY: 1,
+	      // dummy values to ignore in zoomPan
+	      clientX: e.clientX,
+	      clientY: e.clientY,
+	      screenX: e.screenX,
+	      screenY: e.screenY,
+	      x: e.x,
+	      y: e.y
+	    };
+	    var e2 = new WheelEvent('wheel', props);
+	    e2._scale = e.scale; // preserve the original scale
+
+	    e2._rotation = e.rotation; // preserve the original rotation
+
+	    _selection.node().dispatchEvent(e2);
+	  }
+
+	  function zoomPan(event, key, transform) {
+	    var source = event && event.sourceEvent || event;
+	    var eventTransform = transform || event && event.transform;
+	    var x = eventTransform.x;
+	    var y = eventTransform.y;
+	    var k = eventTransform.k; // Special handling of 'wheel' events:
+	    // They might be triggered by the user scrolling the mouse wheel,
+	    // or 2-finger pinch/zoom gestures, the transform may need adjustment.
+
+	    if (source && source.type === 'wheel') {
+	      // assume that the gesture is already handled by pointer events
+	      if (_pointerDown) return;
+	      var detected = utilDetect();
+	      var dX = source.deltaX;
+	      var dY = source.deltaY;
+	      var x2 = x;
+	      var y2 = y;
+	      var k2 = k;
+	      var t0, p0, p1; // Normalize mousewheel scroll speed (Firefox) - #3029
+	      // If wheel delta is provided in LINE units, recalculate it in PIXEL units
+	      // We are essentially redoing the calculations that occur here:
+	      //   https://github.com/d3/d3-zoom/blob/78563a8348aa4133b07cac92e2595c2227ca7cd7/src/zoom.js#L203
+	      // See this for more info:
+	      //   https://github.com/basilfx/normalize-wheel/blob/master/src/normalizeWheel.js
+
+	      if (source.deltaMode === 1
+	      /* LINE */
+	      ) {
+	        // Convert from lines to pixels, more if the user is scrolling fast.
+	        // (I made up the exp function to roughly match Firefox to what Chrome does)
+	        // These numbers should be floats, because integers are treated as pan gesture below.
+	        var lines = Math.abs(source.deltaY);
+	        var sign = source.deltaY > 0 ? 1 : -1;
+	        dY = sign * clamp$1(Math.exp((lines - 1) * 0.75) * 4.000244140625, 4.000244140625, // min
+	        350.000244140625 // max
+	        ); // On Firefox Windows and Linux we always get +/- the scroll line amount (default 3)
+	        // There doesn't seem to be any scroll acceleration.
+	        // This multiplier increases the speed a little bit - #5512
+
+	        if (detected.os !== 'mac') {
+	          dY *= 5;
+	        } // recalculate x2,y2,k2
+
+
+	        t0 = _isTransformed ? _transformLast : _transformStart;
+	        p0 = _getMouseCoords(source);
+	        p1 = t0.invert(p0);
+	        k2 = t0.k * Math.pow(2, -dY / 500);
+	        k2 = clamp$1(k2, kMin, kMax);
+	        x2 = p0[0] - p1[0] * k2;
+	        y2 = p0[1] - p1[1] * k2; // 2 finger map pinch zooming (Safari) - #5492
+	        // These are fake `wheel` events we made from Safari `gesturechange` events..
+	      } else if (source._scale) {
+	        // recalculate x2,y2,k2
+	        t0 = _gestureTransformStart;
+	        p0 = _getMouseCoords(source);
+	        p1 = t0.invert(p0);
+	        k2 = t0.k * source._scale;
+	        k2 = clamp$1(k2, kMin, kMax);
+	        x2 = p0[0] - p1[0] * k2;
+	        y2 = p0[1] - p1[1] * k2; // 2 finger map pinch zooming (all browsers except Safari) - #5492
+	        // Pinch zooming via the `wheel` event will always have:
+	        // - `ctrlKey = true`
+	        // - `deltaY` is not round integer pixels (ignore `deltaX`)
+	      } else if (source.ctrlKey && !isInteger(dY)) {
+	        dY *= 6; // slightly scale up whatever the browser gave us
+	        // recalculate x2,y2,k2
+
+	        t0 = _isTransformed ? _transformLast : _transformStart;
+	        p0 = _getMouseCoords(source);
+	        p1 = t0.invert(p0);
+	        k2 = t0.k * Math.pow(2, -dY / 500);
+	        k2 = clamp$1(k2, kMin, kMax);
+	        x2 = p0[0] - p1[0] * k2;
+	        y2 = p0[1] - p1[1] * k2; // Trackpad scroll zooming with shift or alt/option key down
+	      } else if ((source.altKey || source.shiftKey) && isInteger(dY)) {
+	        // recalculate x2,y2,k2
+	        t0 = _isTransformed ? _transformLast : _transformStart;
+	        p0 = _getMouseCoords(source);
+	        p1 = t0.invert(p0);
+	        k2 = t0.k * Math.pow(2, -dY / 500);
+	        k2 = clamp$1(k2, kMin, kMax);
+	        x2 = p0[0] - p1[0] * k2;
+	        y2 = p0[1] - p1[1] * k2; // 2 finger map panning (Mac only, all browsers except Firefox #8595) - #5492, #5512
+	        // Panning via the `wheel` event will always have:
+	        // - `ctrlKey = false`
+	        // - `deltaX`,`deltaY` are round integer pixels
+	      } else if (detected.os === 'mac' && detected.browser !== 'Firefox' && !source.ctrlKey && isInteger(dX) && isInteger(dY)) {
+	        p1 = projection.translate();
+	        x2 = p1[0] - dX;
+	        y2 = p1[1] - dY;
+	        k2 = projection.scale();
+	        k2 = clamp$1(k2, kMin, kMax);
+	      } // something changed - replace the event transform
+
+
+	      if (x2 !== x || y2 !== y || k2 !== k) {
+	        x = x2;
+	        y = y2;
+	        k = k2;
+	        eventTransform = identity$2.translate(x2, y2).scale(k2);
+
+	        if (_zoomerPanner._transform) {
+	          // utilZoomPan interface
+	          _zoomerPanner._transform(eventTransform);
 	        } else {
-	            _shownPhotoTypes.push(val);
-	        }
-	        dispatch$1.call('change', this);
-	        return photos;
-	    };
-
-	    photos.init = function() {
-	        var hash = utilStringQs(window.location.hash);
-	        if (hash.photo_overlay) {
-	            var hashOverlayIDs = hash.photo_overlay.replace(/;/g, ',').split(',');
-	            hashOverlayIDs.forEach(function(id) {
-	                var layer = context.layers().layer(id);
-	                if (layer) { layer.enabled(true); }
-	            });
-	        }
-
-	        context.layers().on('change.rendererPhotos', updateStorage);
-	    };
-
-	    return utilRebind(photos, dispatch$1, 'on');
-	}
-
-	function uiAccount(context) {
-	    var osm = context.connection();
-
-
-	    function update(selection) {
-	        if (!osm) { return; }
-
-	        if (!osm.authenticated()) {
-	            selection.selectAll('.userLink, .logoutLink')
-	                .classed('hide', true);
-	            return;
+	          // d3_zoom interface
+	          _selection.node().__zoom = eventTransform;
 	        }
+	      }
+	    }
 
-	        osm.userDetails(function(err, details) {
-	            var userLink = selection.select('.userLink'),
-	                logoutLink = selection.select('.logoutLink');
-
-	            userLink.html('');
-	            logoutLink.html('');
-
-	            if (err || !details) { return; }
-
-	            selection.selectAll('.userLink, .logoutLink')
-	                .classed('hide', false);
-
-	            // Link
-	            userLink.append('a')
-	                .attr('href', osm.userURL(details.display_name))
-	                .attr('target', '_blank');
-
-	            // Add thumbnail or dont
-	            if (details.image_url) {
-	                userLink.append('img')
-	                    .attr('class', 'icon pre-text user-icon')
-	                    .attr('src', details.image_url);
-	            } else {
-	                userLink
-	                    .call(svgIcon('#iD-icon-avatar', 'pre-text light'));
-	            }
-
-	            // Add user name
-	            userLink.append('span')
-	                .attr('class', 'label')
-	                .text(details.display_name);
-
-	            logoutLink.append('a')
-	                .attr('class', 'logout')
-	                .attr('href', '#')
-	                .text(_t('logout'))
-	                .on('click.logout', function() {
-	                    event.preventDefault();
-	                    osm.logout();
-	                });
-	        });
+	    if (_transformStart.x === x && _transformStart.y === y && _transformStart.k === k) {
+	      return; // no change
 	    }
 
+	    if (geoScaleToZoom(k, TILESIZE) < _minzoom) {
+	      surface.interrupt();
+	      dispatch.call('hitMinZoom', this, map);
+	      setCenterZoom(map.center(), context.minEditableZoom(), 0, true);
+	      scheduleRedraw();
+	      dispatch.call('move', this, map);
+	      return;
+	    }
 
-	    return function(selection) {
-	        selection.append('li')
-	            .attr('class', 'logoutLink')
-	            .classed('hide', true);
+	    projection.transform(eventTransform);
+	    var withinEditableZoom = map.withinEditableZoom();
 
-	        selection.append('li')
-	            .attr('class', 'userLink')
-	            .classed('hide', true);
+	    if (_lastWithinEditableZoom !== withinEditableZoom) {
+	      if (_lastWithinEditableZoom !== undefined) {
+	        // notify that the map zoomed in or out over the editable zoom threshold
+	        dispatch.call('crossEditableZoom', this, withinEditableZoom);
+	      }
 
-	        if (osm) {
-	            osm.on('change.account', function() { update(selection); });
-	            update(selection);
-	        }
-	    };
-	}
+	      _lastWithinEditableZoom = withinEditableZoom;
+	    }
 
-	function uiAttribution(context) {
-	  var _selection = select(null);
+	    var scale = k / _transformStart.k;
+	    var tX = (x / scale - _transformStart.x) * scale;
+	    var tY = (y / scale - _transformStart.y) * scale;
 
+	    if (context.inIntro()) {
+	      curtainProjection.transform({
+	        x: x - tX,
+	        y: y - tY,
+	        k: k
+	      });
+	    }
 
-	  function render(selection, data, klass) {
-	    var div = selection.selectAll(("." + klass))
-	      .data([0]);
+	    if (source) {
+	      _lastPointerEvent = event;
+	    }
 
-	    div = div.enter()
-	      .append('div')
-	      .attr('class', klass)
-	      .merge(div);
+	    _isTransformed = true;
+	    _transformLast = eventTransform;
+	    utilSetTransform(supersurface, tX, tY, scale);
+	    scheduleRedraw();
+	    dispatch.call('move', this, map);
 
+	    function isInteger(val) {
+	      return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
+	    }
+	  }
 
-	    var attributions = div.selectAll('.attribution')
-	      .data(data, function (d) { return d.id; });
+	  function resetTransform() {
+	    if (!_isTransformed) return false;
+	    utilSetTransform(supersurface, 0, 0);
+	    _isTransformed = false;
 
-	    attributions.exit()
-	      .remove();
+	    if (context.inIntro()) {
+	      curtainProjection.transform(projection.transform());
+	    }
 
-	    attributions = attributions.enter()
-	      .append('span')
-	      .attr('class', 'attribution')
-	      .each(function (d, i, nodes) {
-	        var attribution = select(nodes[i]);
+	    return true;
+	  }
 
-	        if (d.terms_html) {
-	          attribution.html(d.terms_html);
-	          return;
-	        }
+	  function redraw(difference, extent) {
+	    if (surface.empty() || !_redrawEnabled) return; // If we are in the middle of a zoom/pan, we can't do differenced redraws.
+	    // It would result in artifacts where differenced entities are redrawn with
+	    // one transform and unchanged entities with another.
 
-	        if (d.terms_url) {
-	          attribution = attribution
-	            .append('a')
-	            .attr('href', d.terms_url)
-	            .attr('target', '_blank');
-	        }
+	    if (resetTransform()) {
+	      difference = extent = undefined;
+	    }
 
-	        var sourceID = d.id.replace(/\./g, '<TX_DOT>');
-	        var terms_text = _t(("imagery." + sourceID + ".attribution.text"),
-	          { default: d.terms_text || d.id || d.name() }
-	        );
+	    var zoom = map.zoom();
+	    var z = String(~~zoom);
 
-	        if (d.icon && !d.overlay) {
-	          attribution
-	            .append('img')
-	            .attr('class', 'source-image')
-	            .attr('src', d.icon);
-	        }
+	    if (surface.attr('data-zoom') !== z) {
+	      surface.attr('data-zoom', z);
+	    } // class surface as `lowzoom` around z17-z18.5 (based on latitude)
 
-	        attribution
-	          .append('span')
-	          .attr('class', 'attribution-text')
-	          .text(terms_text);
-	      })
-	      .merge(attributions);
 
+	    var lat = map.center()[1];
+	    var lowzoom = linear().domain([-60, 0, 60]).range([17, 18.5, 17]).clamp(true);
+	    surface.classed('low-zoom', zoom <= lowzoom(lat));
 
-	    var copyright = attributions.selectAll('.copyright-notice')
-	      .data(function (d) {
-	        var notice = d.copyrightNotices(context.map().zoom(), context.map().extent());
-	        return notice ? [notice] : [];
-	      });
+	    if (!difference) {
+	      supersurface.call(context.background());
+	      wrapper.call(drawLayers);
+	    } // OSM
 
-	    copyright.exit()
-	      .remove();
 
-	    copyright = copyright.enter()
-	      .append('span')
-	      .attr('class', 'copyright-notice')
-	      .merge(copyright);
+	    if (map.editableDataEnabled() || map.isInWideSelection()) {
+	      context.loadTiles(projection);
+	      drawEditable(difference, extent);
+	    } else {
+	      editOff();
+	    }
 
-	    copyright
-	      .text(String);
+	    _transformStart = projection.transform();
+	    return map;
 	  }
 
+	  var immediateRedraw = function immediateRedraw(difference, extent) {
+	    if (!difference && !extent) cancelPendingRedraw();
+	    redraw(difference, extent);
+	  };
 
-	  function update() {
-	    var baselayer = context.background().baseLayerSource();
-	    _selection
-	      .call(render, (baselayer ? [baselayer] : []), 'base-layer-attribution');
-
-	    var z = context.map().zoom();
-	    var overlays = context.background().overlayLayerSources() || [];
-	    _selection
-	      .call(render, overlays.filter(function (s) { return s.validZoom(z); }), 'overlay-layer-attribution');
-	  }
-
+	  map.lastPointerEvent = function () {
+	    return _lastPointerEvent;
+	  };
 
-	  return function(selection) {
-	    _selection = selection;
+	  map.mouse = function (d3_event) {
+	    var event = d3_event || _lastPointerEvent;
 
-	    context.background()
-	      .on('change.attribution', update);
+	    if (event) {
+	      var s;
 
-	    context.map()
-	      .on('move.attribution', throttle(update, 400, { leading: false }));
+	      while (s = event.sourceEvent) {
+	        event = s;
+	      }
 
-	    update();
-	  };
-	}
+	      return _getMouseCoords(event);
+	    }
 
-	function uiContributors(context) {
-	    var osm = context.connection(),
-	        debouncedUpdate = debounce(function() { update(); }, 1000),
-	        limit = 4,
-	        hidden = false,
-	        wrap = select(null);
+	    return null;
+	  }; // returns Lng/Lat
 
 
-	    function update() {
-	        if (!osm) { return; }
+	  map.mouseCoordinates = function () {
+	    var coord = map.mouse() || pxCenter();
+	    return projection.invert(coord);
+	  };
 
-	        var users = {},
-	            entities = context.history().intersects(context.map().extent());
+	  map.dblclickZoomEnable = function (val) {
+	    if (!arguments.length) return _dblClickZoomEnabled;
+	    _dblClickZoomEnabled = val;
+	    return map;
+	  };
 
-	        entities.forEach(function(entity) {
-	            if (entity && entity.user) { users[entity.user] = true; }
-	        });
+	  map.redrawEnable = function (val) {
+	    if (!arguments.length) return _redrawEnabled;
+	    _redrawEnabled = val;
+	    return map;
+	  };
 
-	        var u = Object.keys(users),
-	            subset = u.slice(0, u.length > limit ? limit - 1 : limit);
+	  map.isTransformed = function () {
+	    return _isTransformed;
+	  };
 
-	        wrap.html('')
-	            .call(svgIcon('#iD-icon-nearby', 'pre-text light'));
+	  function setTransform(t2, duration, force) {
+	    var t = projection.transform();
+	    if (!force && t2.k === t.k && t2.x === t.x && t2.y === t.y) return false;
 
-	        var userList = select(document.createElement('span'));
+	    if (duration) {
+	      _selection.transition().duration(duration).on('start', function () {
+	        map.startEase();
+	      }).call(_zoomerPanner.transform, identity$2.translate(t2.x, t2.y).scale(t2.k));
+	    } else {
+	      projection.transform(t2);
+	      _transformStart = t2;
 
-	        userList.selectAll()
-	            .data(subset)
-	            .enter()
-	            .append('a')
-	            .attr('class', 'user-link')
-	            .attr('href', function(d) { return osm.userURL(d); })
-	            .attr('target', '_blank')
-	            .text(String);
-
-	        if (u.length > limit) {
-	            var count = select(document.createElement('span'));
-
-	            count.append('a')
-	                .attr('target', '_blank')
-	                .attr('href', function() {
-	                    return osm.changesetsURL(context.map().center(), context.map().zoom());
-	                })
-	                .text(u.length - limit + 1);
+	      _selection.call(_zoomerPanner.transform, _transformStart);
+	    }
 
-	            wrap.append('span')
-	                .html(_t('contributors.truncated_list', { users: userList.html(), count: count.html() }));
+	    return true;
+	  }
 
-	        } else {
-	            wrap.append('span')
-	                .html(_t('contributors.list', { users: userList.html() }));
-	        }
+	  function setCenterZoom(loc2, z2, duration, force) {
+	    var c = map.center();
+	    var z = map.zoom();
+	    if (loc2[0] === c[0] && loc2[1] === c[1] && z2 === z && !force) return false;
+	    var proj = geoRawMercator().transform(projection.transform()); // copy projection
+
+	    var k2 = clamp$1(geoZoomToScale(z2, TILESIZE), kMin, kMax);
+	    proj.scale(k2);
+	    var t = proj.translate();
+	    var point = proj(loc2);
+	    var center = pxCenter();
+	    t[0] += center[0] - point[0];
+	    t[1] += center[1] - point[1];
+	    return setTransform(identity$2.translate(t[0], t[1]).scale(k2), duration, force);
+	  }
+
+	  map.pan = function (delta, duration) {
+	    var t = projection.translate();
+	    var k = projection.scale();
+	    t[0] += delta[0];
+	    t[1] += delta[1];
+
+	    if (duration) {
+	      _selection.transition().duration(duration).on('start', function () {
+	        map.startEase();
+	      }).call(_zoomerPanner.transform, identity$2.translate(t[0], t[1]).scale(k));
+	    } else {
+	      projection.translate(t);
+	      _transformStart = projection.transform();
 
-	        if (!u.length) {
-	            hidden = true;
-	            wrap
-	                .transition()
-	                .style('opacity', 0);
+	      _selection.call(_zoomerPanner.transform, _transformStart);
 
-	        } else if (hidden) {
-	            wrap
-	                .transition()
-	                .style('opacity', 1);
-	        }
+	      dispatch.call('move', this, map);
+	      immediateRedraw();
 	    }
 
+	    return map;
+	  };
 
-	    return function(selection) {
-	        if (!osm) { return; }
-	        wrap = selection;
-	        update();
+	  map.dimensions = function (val) {
+	    if (!arguments.length) return _dimensions;
+	    _dimensions = val;
+	    drawLayers.dimensions(_dimensions);
+	    context.background().dimensions(_dimensions);
+	    projection.clipExtent([[0, 0], _dimensions]);
+	    _getMouseCoords = utilFastMouse(supersurface.node());
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	        osm.on('loaded.contributors', debouncedUpdate);
-	        context.map().on('move.contributors', debouncedUpdate);
-	    };
-	}
+	  function zoomIn(delta) {
+	    setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
+	  }
 
-	var _popoverID = 0;
+	  function zoomOut(delta) {
+	    setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
+	  }
 
-	function uiPopover(klass) {
-	    var _id = _popoverID++;
-	    var _anchorSelection = select(null);
-	    var popover = function(selection) {
-	        _anchorSelection = selection;
-	        selection.each(setup);
-	    };
-	    var _animation = utilFunctor(false);
-	    var _placement = utilFunctor('top'); // top, bottom, left, right
-	    var _alignment = utilFunctor('center');  // leading, center, trailing
-	    var _scrollContainer = utilFunctor(select(null));
-	    var _content;
-	    var _displayType = utilFunctor('');
-	    var _hasArrow = utilFunctor(true);
-
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-	    popover.displayType = function(val) {
-	        if (arguments.length) {
-	            _displayType = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _displayType;
-	        }
-	    };
+	  map.zoomIn = function () {
+	    zoomIn(1);
+	  };
 
-	    popover.hasArrow = function(val) {
-	        if (arguments.length) {
-	            _hasArrow = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _hasArrow;
-	        }
-	    };
+	  map.zoomInFurther = function () {
+	    zoomIn(4);
+	  };
 
-	    popover.placement = function(val) {
-	        if (arguments.length) {
-	            _placement = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _placement;
-	        }
-	    };
+	  map.canZoomIn = function () {
+	    return map.zoom() < maxZoom;
+	  };
 
-	    popover.alignment = function(val) {
-	        if (arguments.length) {
-	            _alignment = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _alignment;
-	        }
-	    };
+	  map.zoomOut = function () {
+	    zoomOut(1);
+	  };
 
-	    popover.scrollContainer = function(val) {
-	        if (arguments.length) {
-	            _scrollContainer = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _scrollContainer;
-	        }
-	    };
+	  map.zoomOutFurther = function () {
+	    zoomOut(4);
+	  };
 
-	    popover.content = function(val) {
-	        if (arguments.length) {
-	            _content = val;
-	            return popover;
-	        } else {
-	            return _content;
-	        }
-	    };
+	  map.canZoomOut = function () {
+	    return map.zoom() > minZoom;
+	  };
 
-	    popover.isShown = function() {
-	        var popoverSelection = _anchorSelection.select('.popover-' + _id);
-	        return !popoverSelection.empty() && popoverSelection.classed('in');
-	    };
+	  map.center = function (loc2) {
+	    if (!arguments.length) {
+	      return projection.invert(pxCenter());
+	    }
 
-	    popover.show = function() {
-	        _anchorSelection.each(show);
-	    };
+	    if (setCenterZoom(loc2, map.zoom())) {
+	      dispatch.call('move', this, map);
+	    }
 
-	    popover.updateContent = function() {
-	        _anchorSelection.each(updateContent);
-	    };
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	    popover.hide = function() {
-	        _anchorSelection.each(hide);
-	    };
+	  map.unobscuredCenterZoomEase = function (loc, zoom) {
+	    var offset = map.unobscuredOffsetPx();
+	    var proj = geoRawMercator().transform(projection.transform()); // copy projection
+	    // use the target zoom to calculate the offset center
 
-	    popover.toggle = function() {
-	        _anchorSelection.each(toggle);
-	    };
+	    proj.scale(geoZoomToScale(zoom, TILESIZE));
+	    var locPx = proj(loc);
+	    var offsetLocPx = [locPx[0] + offset[0], locPx[1] + offset[1]];
+	    var offsetLoc = proj.invert(offsetLocPx);
+	    map.centerZoomEase(offsetLoc, zoom);
+	  };
 
-	    popover.destroy = function(selection, selector) {
-	        // by default, just destroy the current popover
-	        selector = selector || '.popover-' + _id;
-
-	        selection
-	            .on(_pointerPrefix + 'enter.popover', null)
-	            .on(_pointerPrefix + 'leave.popover', null)
-	            .on(_pointerPrefix + 'up.popover', null)
-	            .on(_pointerPrefix + 'down.popover', null)
-	            .on('click.popover', null)
-	            .attr('title', function() {
-	                return this.getAttribute('data-original-title') || this.getAttribute('title');
-	            })
-	            .attr('data-original-title', null)
-	            .selectAll(selector)
-	            .remove();
-	    };
+	  map.unobscuredOffsetPx = function () {
+	    var openPane = context.container().select('.map-panes .map-pane.shown');
 
+	    if (!openPane.empty()) {
+	      return [openPane.node().offsetWidth / 2, 0];
+	    }
 
-	    popover.destroyAny = function(selection) {
-	        selection.call(popover.destroy, '.popover');
-	    };
+	    return [0, 0];
+	  };
 
-	    function setup() {
-	        var anchor = select(this);
-	        var animate = _animation.apply(this, arguments);
-	        var popoverSelection = anchor.selectAll('.popover-' + _id)
-	            .data([0]);
+	  map.zoom = function (z2) {
+	    if (!arguments.length) {
+	      return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
+	    }
 
+	    if (z2 < _minzoom) {
+	      surface.interrupt();
+	      dispatch.call('hitMinZoom', this, map);
+	      z2 = context.minEditableZoom();
+	    }
 
-	        var enter = popoverSelection.enter()
-	            .append('div')
-	            .attr('class', 'popover popover-' + _id + ' ' + (klass ? klass : ''))
-	            .classed('arrowed', _hasArrow.apply(this, arguments));
+	    if (setCenterZoom(map.center(), z2)) {
+	      dispatch.call('move', this, map);
+	    }
 
-	        enter
-	            .append('div')
-	            .attr('class', 'popover-arrow');
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	        enter
-	            .append('div')
-	            .attr('class', 'popover-inner');
+	  map.centerZoom = function (loc2, z2) {
+	    if (setCenterZoom(loc2, z2)) {
+	      dispatch.call('move', this, map);
+	    }
 
-	        popoverSelection = enter
-	            .merge(popoverSelection);
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	        if (animate) {
-	            popoverSelection.classed('fade', true);
-	        }
+	  map.zoomTo = function (entity) {
+	    var extent = entity.extent(context.graph());
+	    if (!isFinite(extent.area())) return map;
+	    var z2 = clamp$1(map.trimmedExtentZoom(extent), 0, 20);
+	    return map.centerZoom(extent.center(), z2);
+	  };
 
-	        var display = _displayType.apply(this, arguments);
+	  map.centerEase = function (loc2, duration) {
+	    duration = duration || 250;
+	    setCenterZoom(loc2, map.zoom(), duration);
+	    return map;
+	  };
 
-	        if (display === 'hover') {
-	            var _lastNonMouseEnterTime;
-	            anchor.on(_pointerPrefix + 'enter.popover', function() {
+	  map.zoomEase = function (z2, duration) {
+	    duration = duration || 250;
+	    setCenterZoom(map.center(), z2, duration, false);
+	    return map;
+	  };
 
-	                if (event.pointerType) {
-	                    if (event.pointerType !== 'mouse') {
-	                        _lastNonMouseEnterTime = event.timeStamp;
-	                        // only allow hover behavior for mouse input
-	                        return;
-	                    } else if (_lastNonMouseEnterTime &&
-	                        event.timeStamp - _lastNonMouseEnterTime < 1500) {
-	                        // HACK: iOS 13.4 sends an erroneous `mouse` type pointerenter
-	                        // event for non-mouse interactions right after sending
-	                        // the correct type pointerenter event. Workaround by discarding
-	                        // any mouse event that occurs immediately after a non-mouse event.
-	                        return;
-	                    }
-	                }
+	  map.centerZoomEase = function (loc2, z2, duration) {
+	    duration = duration || 250;
+	    setCenterZoom(loc2, z2, duration, false);
+	    return map;
+	  };
 
-	                // don't show if buttons are pressed, e.g. during click and drag of map
-	                if (event.buttons !== 0) { return; }
+	  map.transformEase = function (t2, duration) {
+	    duration = duration || 250;
+	    setTransform(t2, duration, false
+	    /* don't force */
+	    );
+	    return map;
+	  };
 
-	                show.apply(this, arguments);
-	            });
-	            anchor.on(_pointerPrefix + 'leave.popover', function() {
-	                hide.apply(this, arguments);
-	            });
+	  map.zoomToEase = function (obj, duration) {
+	    var extent;
 
-	        } else if (display === 'clickFocus') {
-	            anchor
-	                .on(_pointerPrefix + 'down.popover', function() {
-	                    event.preventDefault();
-	                    event.stopPropagation();
-	                })
-	                .on(_pointerPrefix + 'up.popover', function() {
-	                    event.preventDefault();
-	                    event.stopPropagation();
-	                })
-	                .on('click.popover', toggle);
+	    if (Array.isArray(obj)) {
+	      obj.forEach(function (entity) {
+	        var entityExtent = entity.extent(context.graph());
 
-	            popoverSelection
-	                .attr('tabindex', 0)
-	                .on('blur.popover', function() {
-	                    anchor.each(function() {
-	                        hide.apply(this, arguments);
-	                    });
-	                });
+	        if (!extent) {
+	          extent = entityExtent;
+	        } else {
+	          extent = extent.extend(entityExtent);
 	        }
+	      });
+	    } else {
+	      extent = obj.extent(context.graph());
 	    }
 
+	    if (!isFinite(extent.area())) return map;
+	    var z2 = clamp$1(map.trimmedExtentZoom(extent), 0, 20);
+	    return map.centerZoomEase(extent.center(), z2, duration);
+	  };
 
-	    function show() {
-	        var anchor = select(this);
-	        var popoverSelection = anchor.selectAll('.popover-' + _id);
-
-	        if (popoverSelection.empty()) {
-	            // popover was removed somehow, put it back
-	            anchor.call(popover.destroy);
-	            anchor.each(setup);
-	            popoverSelection = anchor.selectAll('.popover-' + _id);
-	        }
+	  map.startEase = function () {
+	    utilBindOnce(surface, _pointerPrefix + 'down.ease', function () {
+	      map.cancelEase();
+	    });
+	    return map;
+	  };
 
-	        popoverSelection.classed('in', true);
+	  map.cancelEase = function () {
+	    _selection.interrupt();
 
-	        var displayType = _displayType.apply(this, arguments);
-	        if (displayType === 'clickFocus') {
-	            anchor.classed('active', true);
-	            popoverSelection.node().focus();
-	        }
+	    return map;
+	  };
 
-	        anchor.each(updateContent);
+	  map.extent = function (val) {
+	    if (!arguments.length) {
+	      return new geoExtent(projection.invert([0, _dimensions[1]]), projection.invert([_dimensions[0], 0]));
+	    } else {
+	      var extent = geoExtent(val);
+	      map.centerZoom(extent.center(), map.extentZoom(extent));
 	    }
+	  };
 
-	    function updateContent() {
-	        var anchor = select(this);
-
-	        if (_content) {
-	            anchor.selectAll('.popover-' + _id + ' > .popover-inner')
-	                .call(_content.apply(this, arguments));
-	        }
-
-	        updatePosition.apply(this, arguments);
-	        // hack: update multiple times to fix instances where the absolute offset is
-	        // set before the dynamic popover size is calculated by the browser
-	        updatePosition.apply(this, arguments);
-	        updatePosition.apply(this, arguments);
+	  map.trimmedExtent = function (val) {
+	    if (!arguments.length) {
+	      var headerY = 71;
+	      var footerY = 30;
+	      var pad = 10;
+	      return new geoExtent(projection.invert([pad, _dimensions[1] - footerY - pad]), projection.invert([_dimensions[0] - pad, headerY + pad]));
+	    } else {
+	      var extent = geoExtent(val);
+	      map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
 	    }
+	  };
 
+	  function calcExtentZoom(extent, dim) {
+	    var tl = projection([extent[0][0], extent[1][1]]);
+	    var br = projection([extent[1][0], extent[0][1]]); // Calculate maximum zoom that fits extent
 
-	    function updatePosition() {
-
-	        var anchor = select(this);
-	        var popoverSelection = anchor.selectAll('.popover-' + _id);
-
-	        var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
-	        var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
-	        var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
-	        var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
-
-	        var placement = _placement.apply(this, arguments);
-	        popoverSelection
-	            .classed('left', false)
-	            .classed('right', false)
-	            .classed('top', false)
-	            .classed('bottom', false)
-	            .classed(placement, true);
-
-	        var alignment = _alignment.apply(this, arguments);
-	        var alignFactor = 0.5;
-	        if (alignment === 'leading') {
-	            alignFactor = 0;
-	        } else if (alignment === 'trailing') {
-	            alignFactor = 1;
-	        }
-	        var anchorFrame = getFrame(anchor.node());
-	        var popoverFrame = getFrame(popoverSelection.node());
-	        var position;
-
-	        switch (placement) {
-	            case 'top':
-	            position = {
-	                x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-	                y: anchorFrame.y - popoverFrame.h
-	            };
-	            break;
-	            case 'bottom':
-	            position = {
-	                x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-	                y: anchorFrame.y + anchorFrame.h
-	            };
-	            break;
-	            case 'left':
-	            position = {
-	                x: anchorFrame.x - popoverFrame.w,
-	                y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-	            };
-	            break;
-	            case 'right':
-	            position = {
-	                x: anchorFrame.x + anchorFrame.w,
-	                y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-	            };
-	            break;
-	        }
-
-	        if (position) {
-
-	            if (scrollNode && (placement === 'top' || placement === 'bottom')) {
-
-	                var initialPosX = position.x;
-
-	                if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
-	                    position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
-	                } else if (position.x < 10) {
-	                    position.x = 10;
-	                }
+	    var hFactor = (br[0] - tl[0]) / dim[0];
+	    var vFactor = (br[1] - tl[1]) / dim[1];
+	    var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
+	    var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
+	    var newZoom = map.zoom() - Math.max(hZoomDiff, vZoomDiff);
+	    return newZoom;
+	  }
 
-	                var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow');
-	                // keep the arrow centered on the button, or as close as possible
-	                var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
-	                arrow.style('left', ~~arrowPosX + 'px');
-	            }
+	  map.extentZoom = function (val) {
+	    return calcExtentZoom(geoExtent(val), _dimensions);
+	  };
 
-	            popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
-	        } else {
-	            popoverSelection.style('left', null).style('top', null);
-	        }
+	  map.trimmedExtentZoom = function (val) {
+	    var trimY = 120;
+	    var trimX = 40;
+	    var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
+	    return calcExtentZoom(geoExtent(val), trimmed);
+	  };
 
-	        function getFrame(node) {
-	            var positionStyle = select(node).style('position');
-	            if (positionStyle === 'absolute' || positionStyle === 'static') {
-	                return {
-	                    x: node.offsetLeft - scrollLeft,
-	                    y: node.offsetTop - scrollTop,
-	                    w: node.offsetWidth,
-	                    h: node.offsetHeight
-	                };
-	            } else {
-	                return {
-	                    x: 0,
-	                    y: 0,
-	                    w: node.offsetWidth,
-	                    h: node.offsetHeight
-	                };
-	            }
-	        }
-	    }
+	  map.withinEditableZoom = function () {
+	    return map.zoom() >= context.minEditableZoom();
+	  };
 
+	  map.isInWideSelection = function () {
+	    return !map.withinEditableZoom() && context.selectedIDs().length;
+	  };
 
-	    function hide() {
-	        var anchor = select(this);
-	        if (_displayType.apply(this, arguments) === 'clickFocus') {
-	            anchor.classed('active', false);
-	        }
-	        anchor.selectAll('.popover-' + _id).classed('in', false);
-	    }
+	  map.editableDataEnabled = function (skipZoomCheck) {
+	    var layer = context.layers().layer('osm');
+	    if (!layer || !layer.enabled()) return false;
+	    return skipZoomCheck || map.withinEditableZoom();
+	  };
 
+	  map.notesEditable = function () {
+	    var layer = context.layers().layer('notes');
+	    if (!layer || !layer.enabled()) return false;
+	    return map.withinEditableZoom();
+	  };
 
-	    function toggle() {
-	        if (select(this).select('.popover-' + _id).classed('in')) {
-	            hide.apply(this, arguments);
-	        } else {
-	            show.apply(this, arguments);
-	        }
-	    }
+	  map.minzoom = function (val) {
+	    if (!arguments.length) return _minzoom;
+	    _minzoom = val;
+	    return map;
+	  };
 
+	  map.toggleHighlightEdited = function () {
+	    surface.classed('highlight-edited', !surface.classed('highlight-edited'));
+	    map.pan([0, 0]); // trigger a redraw
 
-	    return popover;
-	}
+	    dispatch.call('changeHighlighting', this);
+	  };
 
-	function uiTooltip(klass) {
+	  map.areaFillOptions = ['wireframe', 'partial', 'full'];
 
-	    var tooltip = uiPopover((klass || '') + ' tooltip')
-	        .displayType('hover');
+	  map.activeAreaFill = function (val) {
+	    if (!arguments.length) return corePreferences('area-fill') || 'partial';
+	    corePreferences('area-fill', val);
 
-	    var _title = function() {
-	        var title = this.getAttribute('data-original-title');
-	        if (title) {
-	            return title;
-	        } else {
-	            title = this.getAttribute('title');
-	            this.removeAttribute('title');
-	            this.setAttribute('data-original-title', title);
-	        }
-	        return title;
-	    };
+	    if (val !== 'wireframe') {
+	      corePreferences('area-fill-toggle', val);
+	    }
 
-	    var _heading = utilFunctor(null);
-	    var _keys = utilFunctor(null);
+	    updateAreaFill();
+	    map.pan([0, 0]); // trigger a redraw
 
-	    tooltip.title = function(val) {
-	        if (!arguments.length) { return _title; }
-	        _title = utilFunctor(val);
-	        return tooltip;
-	    };
+	    dispatch.call('changeAreaFill', this);
+	    return map;
+	  };
 
-	    tooltip.heading = function(val) {
-	        if (!arguments.length) { return _heading; }
-	        _heading = utilFunctor(val);
-	        return tooltip;
-	    };
+	  map.toggleWireframe = function () {
+	    var activeFill = map.activeAreaFill();
 
-	    tooltip.keys = function(val) {
-	        if (!arguments.length) { return _keys; }
-	        _keys = utilFunctor(val);
-	        return tooltip;
-	    };
+	    if (activeFill === 'wireframe') {
+	      activeFill = corePreferences('area-fill-toggle') || 'partial';
+	    } else {
+	      activeFill = 'wireframe';
+	    }
 
-	    tooltip.content(function() {
-	        var heading = _heading.apply(this, arguments);
-	        var text = _title.apply(this, arguments);
-	        var keys = _keys.apply(this, arguments);
+	    map.activeAreaFill(activeFill);
+	  };
 
-	        return function(selection) {
+	  function updateAreaFill() {
+	    var activeFill = map.activeAreaFill();
+	    map.areaFillOptions.forEach(function (opt) {
+	      surface.classed('fill-' + opt, Boolean(opt === activeFill));
+	    });
+	  }
 
-	            var headingSelect = selection
-	                .selectAll('.tooltip-heading')
-	                .data(heading ? [heading] :[]);
+	  map.layers = function () {
+	    return drawLayers;
+	  };
 
-	            headingSelect.exit()
-	                .remove();
+	  map.doubleUpHandler = function () {
+	    return _doubleUpHandler;
+	  };
 
-	            headingSelect.enter()
-	                .append('div')
-	                .attr('class', 'tooltip-heading')
-	                .merge(headingSelect)
-	                .html(heading);
+	  return utilRebind(map, dispatch, 'on');
+	}
 
-	            var textSelect = selection
-	                .selectAll('.tooltip-text')
-	                .data(text ? [text] :[]);
+	function rendererPhotos(context) {
+	  var dispatch = dispatch$8('change');
+	  var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'kartaview'];
+	  var _allPhotoTypes = ['flat', 'panoramic'];
 
-	            textSelect.exit()
-	                .remove();
+	  var _shownPhotoTypes = _allPhotoTypes.slice(); // shallow copy
 
-	            textSelect.enter()
-	                .append('div')
-	                .attr('class', 'tooltip-text')
-	                .merge(textSelect)
-	                .html(text);
 
-	            var keyhintWrap = selection
-	                .selectAll('.keyhint-wrap')
-	                .data(keys && keys.length ? [0] : []);
+	  var _dateFilters = ['fromDate', 'toDate'];
 
-	            keyhintWrap.exit()
-	                .remove();
+	  var _fromDate;
 
-	            var keyhintWrapEnter = keyhintWrap.enter()
-	                .append('div')
-	                .attr('class', 'keyhint-wrap');
+	  var _toDate;
 
-	            keyhintWrapEnter
-	                .append('span')
-	                .html(_t('tooltip_keyhint'));
+	  var _usernames;
 
-	            keyhintWrap = keyhintWrapEnter.merge(keyhintWrap);
+	  function photos() {}
 
-	            keyhintWrap.selectAll('kbd.shortcut')
-	                .data(keys && keys.length ? keys : [])
-	                .enter()
-	                .append('kbd')
-	                .attr('class', 'shortcut')
-	                .html(function(d) {
-	                    return d;
-	                });
-	        };
+	  function updateStorage() {
+	    if (window.mocha) return;
+	    var hash = utilStringQs(window.location.hash);
+	    var enabled = context.layers().all().filter(function (d) {
+	      return _layerIDs.indexOf(d.id) !== -1 && d.layer && d.layer.supported() && d.layer.enabled();
+	    }).map(function (d) {
+	      return d.id;
 	    });
 
-	    return tooltip;
-	}
-
-	function uiEditMenu(context) {
-	    var dispatch$1 = dispatch('toggled');
+	    if (enabled.length) {
+	      hash.photo_overlay = enabled.join(',');
+	    } else {
+	      delete hash.photo_overlay;
+	    }
 
-	    var _menu = select(null);
-	    var _operations = [];
-	    // the position the menu should be displayed relative to
-	    var _anchorLoc = [0, 0];
-	    var _anchorLocLonLat = [0, 0];
-	    // a string indicating how the menu was opened
-	    var _triggerType = '';
+	    window.location.replace('#' + utilQsString(hash, true));
+	  }
 
-	    var _vpTopMargin = 85; // viewport top margin
-	    var _vpBottomMargin = 45; // viewport bottom margin
-	    var _vpSideMargin = 35;   // viewport side margin
+	  photos.overlayLayerIDs = function () {
+	    return _layerIDs;
+	  };
 
-	    var _menuTop = false;
-	    var _menuHeight;
-	    var _menuWidth;
+	  photos.allPhotoTypes = function () {
+	    return _allPhotoTypes;
+	  };
 
-	    // hardcode these values to make menu positioning easier
-	    var _verticalPadding = 4;
+	  photos.dateFilters = function () {
+	    return _dateFilters;
+	  };
 
-	    // see also `.edit-menu .tooltip` CSS; include margin
-	    var _tooltipWidth = 210;
+	  photos.dateFilterValue = function (val) {
+	    return val === _dateFilters[0] ? _fromDate : _toDate;
+	  };
 
-	    // offset the menu slightly from the target location
-	    var _menuSideMargin = 10;
+	  photos.setDateFilter = function (type, val, updateUrl) {
+	    // validate the date
+	    var date = val && new Date(val);
 
-	    var _tooltips = [];
+	    if (date && !isNaN(date)) {
+	      val = date.toISOString().substr(0, 10);
+	    } else {
+	      val = null;
+	    }
 
-	    var editMenu = function(selection) {
+	    if (type === _dateFilters[0]) {
+	      _fromDate = val;
 
-	        var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
+	      if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+	        _toDate = _fromDate;
+	      }
+	    }
 
-	        var ops = _operations.filter(function(op) {
-	            return !isTouchMenu || !op.mouseOnly;
-	        });
+	    if (type === _dateFilters[1]) {
+	      _toDate = val;
 
-	        if (!ops.length) { return; }
+	      if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+	        _fromDate = _toDate;
+	      }
+	    }
 
-	        _tooltips = [];
+	    dispatch.call('change', this);
 
-	        // Position the menu above the anchor for stylus and finger input
-	        // since the mapper's hand likely obscures the screen below the anchor
-	        _menuTop = isTouchMenu;
+	    if (updateUrl) {
+	      var rangeString;
 
-	        // Show labels for touch input since there aren't hover tooltips
-	        var showLabels = isTouchMenu;
+	      if (_fromDate || _toDate) {
+	        rangeString = (_fromDate || '') + '_' + (_toDate || '');
+	      }
 
-	        var buttonHeight = showLabels ? 32 : 34;
-	        if (showLabels) {
-	            // Get a general idea of the width based on the length of the label
-	            _menuWidth = 52 + Math.min(120, 6 * Math.max.apply(Math, ops.map(function(op) {
-	                return op.title.length;
-	            })));
-	        } else {
-	            _menuWidth = 44;
-	        }
+	      setUrlFilterValue('photo_dates', rangeString);
+	    }
+	  };
 
-	        _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
+	  photos.setUsernameFilter = function (val, updateUrl) {
+	    if (val && typeof val === 'string') val = val.replace(/;/g, ',').split(',');
 
-	        _menu = selection
-	            .append('div')
-	            .attr('class', 'edit-menu')
-	            .classed('touch-menu', isTouchMenu)
-	            .style('padding', _verticalPadding + 'px 0');
-
-	        var buttons = _menu.selectAll('.edit-menu-item')
-	            .data(ops);
-
-	        // enter
-	        var buttonsEnter = buttons.enter()
-	            .append('button')
-	            .attr('class', function (d) { return 'edit-menu-item edit-menu-item-' + d.id; })
-	            .style('height', buttonHeight + 'px')
-	            .on('click', click)
-	            // don't listen for `mouseup` because we only care about non-mouse pointer types
-	            .on('pointerup', pointerup)
-	            .on('pointerdown mousedown', function pointerdown() {
-	                // don't let button presses also act as map input - #1869
-	                event.stopPropagation();
-	            });
+	    if (val) {
+	      val = val.map(function (d) {
+	        return d.trim();
+	      }).filter(Boolean);
 
-	        buttonsEnter.each(function(d) {
-	            var tooltip = uiTooltip()
-	                .heading(d.title)
-	                .title(d.tooltip())
-	                .keys([d.keys[0]]);
+	      if (!val.length) {
+	        val = null;
+	      }
+	    }
 
-	            _tooltips.push(tooltip);
+	    _usernames = val;
+	    dispatch.call('change', this);
 
-	            select(this)
-	                .call(tooltip)
-	                .append('div')
-	                .attr('class', 'icon-wrap')
-	                .call(svgIcon('#iD-operation-' + d.id, 'operation'));
-	        });
+	    if (updateUrl) {
+	      var hashString;
 
-	        if (showLabels) {
-	            buttonsEnter.append('span')
-	                .attr('class', 'label')
-	                .text(function(d) {
-	                    return d.title;
-	                });
-	        }
+	      if (_usernames) {
+	        hashString = _usernames.join(',');
+	      }
 
-	        // update
-	        buttons = buttonsEnter
-	            .merge(buttons)
-	            .classed('disabled', function(d) { return d.disabled(); });
+	      setUrlFilterValue('photo_username', hashString);
+	    }
+	  };
 
-	        updatePosition();
+	  function setUrlFilterValue(property, val) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	        var initialScale = context.projection.scale();
-	        context.map()
-	            .on('move.edit-menu', function() {
-	                if (initialScale !== context.projection.scale()) {
-	                    editMenu.close();
-	                }
-	            })
-	            .on('drawn.edit-menu', function(info) {
-	                if (info.full) { updatePosition(); }
-	            });
+	      if (val) {
+	        if (hash[property] === val) return;
+	        hash[property] = val;
+	      } else {
+	        if (!(property in hash)) return;
+	        delete hash[property];
+	      }
 
-	        var lastPointerUpType;
-	        // `pointerup` is always called before `click`
-	        function pointerup() {
-	            lastPointerUpType = event.pointerType;
-	        }
-
-	        function click(operation) {
-	            event.stopPropagation();
-	            if (operation.disabled()) {
-	                if (lastPointerUpType === 'touch' ||
-	                    lastPointerUpType === 'pen') {
-	                    // there are no tooltips for touch interactions so flash feedback instead
-	                    context.ui().flash
-	                        .duration(4000)
-	                        .iconName('#iD-operation-' + operation.id)
-	                        .iconClass('operation disabled')
-	                        .text(operation.tooltip)();
-	                }
-	            } else {
-	                if (lastPointerUpType === 'touch' ||
-	                    lastPointerUpType === 'pen') {
-	                    context.ui().flash
-	                        .duration(2000)
-	                        .iconName('#iD-operation-' + operation.id)
-	                        .iconClass('operation')
-	                        .text(operation.annotation() || operation.title)();
-	                }
+	      window.location.replace('#' + utilQsString(hash, true));
+	    }
+	  }
 
-	                operation();
-	                editMenu.close();
-	            }
-	            lastPointerUpType = null;
-	        }
+	  function showsLayer(id) {
+	    var layer = context.layers().layer(id);
+	    return layer && layer.supported() && layer.enabled();
+	  }
 
-	        dispatch$1.call('toggled', this, true);
-	    };
+	  photos.shouldFilterByDate = function () {
+	    return showsLayer('mapillary') || showsLayer('kartaview') || showsLayer('streetside');
+	  };
 
-	    function updatePosition() {
+	  photos.shouldFilterByPhotoType = function () {
+	    return showsLayer('mapillary') || showsLayer('streetside') && showsLayer('kartaview');
+	  };
 
-	        if (!_menu || _menu.empty()) { return; }
+	  photos.shouldFilterByUsername = function () {
+	    return !showsLayer('mapillary') && showsLayer('kartaview') && !showsLayer('streetside');
+	  };
 
-	        var anchorLoc = context.projection(_anchorLocLonLat);
+	  photos.showsPhotoType = function (val) {
+	    if (!photos.shouldFilterByPhotoType()) return true;
+	    return _shownPhotoTypes.indexOf(val) !== -1;
+	  };
 
-	        var viewport = context.surfaceRect();
+	  photos.showsFlat = function () {
+	    return photos.showsPhotoType('flat');
+	  };
 
-	        if (anchorLoc[0] < 0 ||
-	            anchorLoc[0] > viewport.width ||
-	            anchorLoc[1] < 0 ||
-	            anchorLoc[1] > viewport.height) {
-	            // close the menu if it's gone offscreen
+	  photos.showsPanoramic = function () {
+	    return photos.showsPhotoType('panoramic');
+	  };
 
-	            editMenu.close();
-	            return;
-	        }
+	  photos.fromDate = function () {
+	    return _fromDate;
+	  };
 
-	        var menuLeft = displayOnLeft(viewport);
+	  photos.toDate = function () {
+	    return _toDate;
+	  };
 
-	        var offset = [0, 0];
+	  photos.togglePhotoType = function (val) {
+	    var index = _shownPhotoTypes.indexOf(val);
 
-	        offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
+	    if (index !== -1) {
+	      _shownPhotoTypes.splice(index, 1);
+	    } else {
+	      _shownPhotoTypes.push(val);
+	    }
 
-	        if (_menuTop) {
-	            if (anchorLoc[1] - _menuHeight < _vpTopMargin) {
-	                // menu is near top viewport edge, shift downward
-	                offset[1] = -anchorLoc[1] + _vpTopMargin;
-	            } else {
-	                offset[1] = -_menuHeight;
-	            }
-	        } else {
-	            if (anchorLoc[1] + _menuHeight > (viewport.height - _vpBottomMargin)) {
-	                // menu is near bottom viewport edge, shift upwards
-	                offset[1] = -anchorLoc[1] - _menuHeight + viewport.height - _vpBottomMargin;
-	            } else {
-	                offset[1] = 0;
-	            }
-	        }
+	    dispatch.call('change', this);
+	    return photos;
+	  };
 
-	        var origin = geoVecAdd(anchorLoc, offset);
+	  photos.usernames = function () {
+	    return _usernames;
+	  };
 
-	        _menu
-	            .style('left', origin[0] + 'px')
-	            .style('top', origin[1] + 'px');
+	  photos.init = function () {
+	    var hash = utilStringQs(window.location.hash);
 
-	        var tooltipSide = tooltipPosition(viewport, menuLeft);
-	        _tooltips.forEach(function(tooltip) {
-	            tooltip.placement(tooltipSide);
-	        });
+	    if (hash.photo_dates) {
+	      // expect format like `photo_dates=2019-01-01_2020-12-31`, but allow a couple different separators
+	      var parts = /^(.*)[–_](.*)$/g.exec(hash.photo_dates.trim());
+	      this.setDateFilter('fromDate', parts && parts.length >= 2 && parts[1], false);
+	      this.setDateFilter('toDate', parts && parts.length >= 3 && parts[2], false);
+	    }
 
-	        function displayOnLeft(viewport) {
-	            if (_mainLocalizer.textDirection() === 'ltr') {
-	                if ((anchorLoc[0] + _menuSideMargin + _menuWidth) > (viewport.width - _vpSideMargin)) {
-	                    // right menu would be too close to the right viewport edge, go left
-	                    return true;
-	                }
-	                // prefer right menu
-	                return false;
+	    if (hash.photo_username) {
+	      this.setUsernameFilter(hash.photo_username, false);
+	    }
 
-	            } else { // rtl
-	                if ((anchorLoc[0] - _menuSideMargin - _menuWidth) < _vpSideMargin) {
-	                    // left menu would be too close to the left viewport edge, go right
-	                    return false;
-	                }
-	                // prefer left menu
-	                return true;
-	            }
-	        }
+	    if (hash.photo_overlay) {
+	      // support enabling photo layers by default via a URL parameter, e.g. `photo_overlay=kartaview;mapillary;streetside`
+	      var hashOverlayIDs = hash.photo_overlay.replace(/;/g, ',').split(',');
+	      hashOverlayIDs.forEach(function (id) {
+	        if (id === 'openstreetcam') id = 'kartaview'; // legacy alias
 
-	        function tooltipPosition(viewport, menuLeft) {
-	            if (_mainLocalizer.textDirection() === 'ltr') {
-	                if (menuLeft) {
-	                    // if there's not room for a right-side menu then there definitely
-	                    // isn't room for right-side tooltips
-	                    return 'left';
-	                }
-	                if ((anchorLoc[0] + _menuSideMargin + _menuWidth + _tooltipWidth) > (viewport.width - _vpSideMargin)) {
-	                    // right tooltips would be too close to the right viewport edge, go left
-	                    return 'left';
-	                }
-	                // prefer right tooltips
-	                return 'right';
+	        var layer = _layerIDs.indexOf(id) !== -1 && context.layers().layer(id);
+	        if (layer && !layer.enabled()) layer.enabled(true);
+	      });
+	    }
 
-	            } else { // rtl
-	                if (!menuLeft) {
-	                    return 'right';
-	                }
-	                if ((anchorLoc[0] - _menuSideMargin - _menuWidth - _tooltipWidth) < _vpSideMargin) {
-	                    // left tooltips would be too close to the left viewport edge, go right
-	                    return 'right';
-	                }
-	                // prefer left tooltips
-	                return 'left';
+	    if (hash.photo) {
+	      // support opening a photo via a URL parameter, e.g. `photo=mapillary-fztgSDtLpa08ohPZFZjeRQ`
+	      var photoIds = hash.photo.replace(/;/g, ',').split(',');
+	      var photoId = photoIds.length && photoIds[0].trim();
+	      var results = /(.*)\/(.*)/g.exec(photoId);
+
+	      if (results && results.length >= 3) {
+	        var serviceId = results[1];
+	        if (serviceId === 'openstreetcam') serviceId = 'kartaview'; // legacy alias
+
+	        var photoKey = results[2];
+	        var service = services[serviceId];
+
+	        if (service && service.ensureViewerLoaded) {
+	          // if we're showing a photo then make sure its layer is enabled too
+	          var layer = _layerIDs.indexOf(serviceId) !== -1 && context.layers().layer(serviceId);
+	          if (layer && !layer.enabled()) layer.enabled(true);
+	          var baselineTime = Date.now();
+	          service.on('loadedImages.rendererPhotos', function () {
+	            // don't open the viewer if too much time has elapsed
+	            if (Date.now() - baselineTime > 45000) {
+	              service.on('loadedImages.rendererPhotos', null);
+	              return;
 	            }
+
+	            if (!service.cachedImage(photoKey)) return;
+	            service.on('loadedImages.rendererPhotos', null);
+	            service.ensureViewerLoaded(context).then(function () {
+	              service.selectImage(context, photoKey).showViewer(context);
+	            });
+	          });
 	        }
+	      }
 	    }
 
-	    editMenu.close = function () {
-
-	        context.map()
-	            .on('move.edit-menu', null)
-	            .on('drawn.edit-menu', null);
+	    context.layers().on('change.rendererPhotos', updateStorage);
+	  };
 
-	        _menu.remove();
-	        _tooltips = [];
+	  return utilRebind(photos, dispatch, 'on');
+	}
 
-	        dispatch$1.call('toggled', this, false);
-	    };
+	function uiAccount(context) {
+	  var osm = context.connection();
 
-	    editMenu.anchorLoc = function(val) {
-	        if (!arguments.length) { return _anchorLoc; }
-	        _anchorLoc = val;
-	        _anchorLocLonLat = context.projection.invert(_anchorLoc);
-	        return editMenu;
-	    };
+	  function update(selection) {
+	    if (!osm) return;
 
-	    editMenu.triggerType = function(val) {
-	        if (!arguments.length) { return _triggerType; }
-	        _triggerType = val;
-	        return editMenu;
-	    };
+	    if (!osm.authenticated()) {
+	      selection.selectAll('.userLink, .logoutLink').classed('hide', true);
+	      return;
+	    }
 
-	    editMenu.operations = function(val) {
-	        if (!arguments.length) { return _operations; }
-	        _operations = val;
-	        return editMenu;
-	    };
+	    osm.userDetails(function (err, details) {
+	      var userLink = selection.select('.userLink'),
+	          logoutLink = selection.select('.logoutLink');
+	      userLink.html('');
+	      logoutLink.html('');
+	      if (err || !details) return;
+	      selection.selectAll('.userLink, .logoutLink').classed('hide', false); // Link
 
-	    return utilRebind(editMenu, dispatch$1, 'on');
-	}
+	      var userLinkA = userLink.append('a').attr('href', osm.userURL(details.display_name)).attr('target', '_blank'); // Add thumbnail or dont
 
-	function uiFeatureInfo(context) {
-	    function update(selection) {
-	        var features = context.features();
-	        var stats = features.stats();
-	        var count = 0;
-	        var hiddenList = features.hidden().map(function(k) {
-	            if (stats[k]) {
-	                count += stats[k];
-	                return String(stats[k]) + ' ' + _t('feature.' + k + '.description');
-	            }
-	        }).filter(Boolean);
+	      if (details.image_url) {
+	        userLinkA.append('img').attr('class', 'icon pre-text user-icon').attr('src', details.image_url);
+	      } else {
+	        userLinkA.call(svgIcon('#iD-icon-avatar', 'pre-text light'));
+	      } // Add user name
 
-	        selection.html('');
 
-	        if (hiddenList.length) {
-	            var tooltipBehavior = uiTooltip()
-	                .placement('top')
-	                .title(function() {
-	                    return hiddenList.join('<br/>');
-	                });
+	      userLinkA.append('span').attr('class', 'label').html(details.display_name);
+	      logoutLink.append('a').attr('class', 'logout').attr('href', '#').call(_t.append('logout')).on('click.logout', function (d3_event) {
+	        d3_event.preventDefault();
+	        osm.logout();
+	      });
+	    });
+	  }
 
-	            selection.append('a')
-	                .attr('class', 'chip')
-	                .attr('href', '#')
-	                .attr('tabindex', -1)
-	                .html(_t('feature_info.hidden_warning', { count: count }))
-	                .call(tooltipBehavior)
-	                .on('click', function() {
-	                    tooltipBehavior.hide();
-	                    event.preventDefault();
-	                    // open the Map Data pane
-	                    context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
-	                });
-	        }
+	  return function (selection) {
+	    selection.append('li').attr('class', 'userLink').classed('hide', true);
+	    selection.append('li').attr('class', 'logoutLink').classed('hide', true);
 
-	        selection
-	            .classed('hide', !hiddenList.length);
+	    if (osm) {
+	      osm.on('change.account', function () {
+	        update(selection);
+	      });
+	      update(selection);
 	    }
+	  };
+	}
 
+	function uiAttribution(context) {
+	  var _selection = select(null);
 
-	    return function(selection) {
-	        update(selection);
+	  function render(selection, data, klass) {
+	    var div = selection.selectAll(".".concat(klass)).data([0]);
+	    div = div.enter().append('div').attr('class', klass).merge(div);
+	    var attributions = div.selectAll('.attribution').data(data, function (d) {
+	      return d.id;
+	    });
+	    attributions.exit().remove();
+	    attributions = attributions.enter().append('span').attr('class', 'attribution').each(function (d, i, nodes) {
+	      var attribution = select(nodes[i]);
 
-	        context.features().on('change.feature_info', function() {
-	            update(selection);
-	        });
-	    };
-	}
+	      if (d.terms_html) {
+	        attribution.html(d.terms_html);
+	        return;
+	      }
 
-	function uiFlash(context) {
-	    var _flashTimer;
+	      if (d.terms_url) {
+	        attribution = attribution.append('a').attr('href', d.terms_url).attr('target', '_blank');
+	      }
 
-	    var _duration = 2000;
-	    var _iconName = '#iD-icon-no';
-	    var _iconClass = 'disabled';
-	    var _text = '';
-	    var _textClass;
+	      var sourceID = d.id.replace(/\./g, '<TX_DOT>');
+	      var terms_text = _t("imagery.".concat(sourceID, ".attribution.text"), {
+	        "default": d.terms_text || d.id || d.name()
+	      });
 
-	    function flash() {
-	        if (_flashTimer) {
-	            _flashTimer.stop();
-	        }
+	      if (d.icon && !d.overlay) {
+	        attribution.append('img').attr('class', 'source-image').attr('src', d.icon);
+	      }
 
-	        context.container().select('.main-footer-wrap')
-	            .classed('footer-hide', true)
-	            .classed('footer-show', false);
-	        context.container().select('.flash-wrap')
-	            .classed('footer-hide', false)
-	            .classed('footer-show', true);
+	      attribution.append('span').attr('class', 'attribution-text').text(terms_text);
+	    }).merge(attributions);
+	    var copyright = attributions.selectAll('.copyright-notice').data(function (d) {
+	      var notice = d.copyrightNotices(context.map().zoom(), context.map().extent());
+	      return notice ? [notice] : [];
+	    });
+	    copyright.exit().remove();
+	    copyright = copyright.enter().append('span').attr('class', 'copyright-notice').merge(copyright);
+	    copyright.text(String);
+	  }
 
-	        var content = context.container().select('.flash-wrap').selectAll('.flash-content')
-	            .data([0]);
+	  function update() {
+	    var baselayer = context.background().baseLayerSource();
 
-	        // Enter
-	        var contentEnter = content.enter()
-	            .append('div')
-	            .attr('class', 'flash-content');
+	    _selection.call(render, baselayer ? [baselayer] : [], 'base-layer-attribution');
 
-	        var iconEnter = contentEnter
-	            .append('svg')
-	            .attr('class', 'flash-icon icon')
-	            .append('g')
-	            .attr('transform', 'translate(10,10)');
+	    var z = context.map().zoom();
+	    var overlays = context.background().overlayLayerSources() || [];
 
-	        iconEnter
-	            .append('circle')
-	            .attr('r', 9);
+	    _selection.call(render, overlays.filter(function (s) {
+	      return s.validZoom(z);
+	    }), 'overlay-layer-attribution');
+	  }
 
-	        iconEnter
-	            .append('use')
-	            .attr('transform', 'translate(-7,-7)')
-	            .attr('width', '14')
-	            .attr('height', '14');
+	  return function (selection) {
+	    _selection = selection;
+	    context.background().on('change.attribution', update);
+	    context.map().on('move.attribution', throttle(update, 400, {
+	      leading: false
+	    }));
+	    update();
+	  };
+	}
 
-	        contentEnter
-	            .append('div')
-	            .attr('class', 'flash-text');
+	function uiContributors(context) {
+	  var osm = context.connection(),
+	      debouncedUpdate = debounce(function () {
+	    update();
+	  }, 1000),
+	      limit = 4,
+	      hidden = false,
+	      wrap = select(null);
 
+	  function update() {
+	    if (!osm) return;
+	    var users = {},
+	        entities = context.history().intersects(context.map().extent());
+	    entities.forEach(function (entity) {
+	      if (entity && entity.user) users[entity.user] = true;
+	    });
+	    var u = Object.keys(users),
+	        subset = u.slice(0, u.length > limit ? limit - 1 : limit);
+	    wrap.html('').call(svgIcon('#iD-icon-nearby', 'pre-text light'));
+	    var userList = select(document.createElement('span'));
+	    userList.selectAll().data(subset).enter().append('a').attr('class', 'user-link').attr('href', function (d) {
+	      return osm.userURL(d);
+	    }).attr('target', '_blank').text(String);
+
+	    if (u.length > limit) {
+	      var count = select(document.createElement('span'));
+	      var othersNum = u.length - limit + 1;
+	      count.append('a').attr('target', '_blank').attr('href', function () {
+	        return osm.changesetsURL(context.map().center(), context.map().zoom());
+	      }).text(othersNum);
+	      wrap.append('span').html(_t.html('contributors.truncated_list', {
+	        n: othersNum,
+	        users: {
+	          html: userList.html()
+	        },
+	        count: {
+	          html: count.html()
+	        }
+	      }));
+	    } else {
+	      wrap.append('span').html(_t.html('contributors.list', {
+	        users: {
+	          html: userList.html()
+	        }
+	      }));
+	    }
 
-	        // Update
-	        content = content
-	            .merge(contentEnter);
+	    if (!u.length) {
+	      hidden = true;
+	      wrap.transition().style('opacity', 0);
+	    } else if (hidden) {
+	      wrap.transition().style('opacity', 1);
+	    }
+	  }
 
-	        content
-	            .selectAll('.flash-icon')
-	            .attr('class', 'icon flash-icon ' + (_iconClass || ''));
+	  return function (selection) {
+	    if (!osm) return;
+	    wrap = selection;
+	    update();
+	    osm.on('loaded.contributors', debouncedUpdate);
+	    context.map().on('move.contributors', debouncedUpdate);
+	  };
+	}
 
-	        content
-	            .selectAll('.flash-icon use')
-	            .attr('xlink:href', _iconName);
+	var _popoverID = 0;
+	function uiPopover(klass) {
+	  var _id = _popoverID++;
 
-	        content
-	            .selectAll('.flash-text')
-	            .attr('class', 'flash-text ' + (_textClass || ''))
-	            .text(_text);
+	  var _anchorSelection = select(null);
 
+	  var popover = function popover(selection) {
+	    _anchorSelection = selection;
+	    selection.each(setup);
+	  };
 
-	        _flashTimer = d3_timeout(function() {
-	            _flashTimer = null;
-	            context.container().select('.main-footer-wrap')
-	                .classed('footer-hide', false)
-	                .classed('footer-show', true);
-	            context.container().select('.flash-wrap')
-	                .classed('footer-hide', true)
-	                .classed('footer-show', false);
-	        }, _duration);
+	  var _animation = utilFunctor(false);
 
-	        return content;
-	    }
+	  var _placement = utilFunctor('top'); // top, bottom, left, right
 
 
-	    flash.duration = function(_) {
-	        if (!arguments.length) { return _duration; }
-	        _duration = _;
-	        return flash;
-	    };
+	  var _alignment = utilFunctor('center'); // leading, center, trailing
 
-	    flash.text = function(_) {
-	        if (!arguments.length) { return _text; }
-	        _text = _;
-	        return flash;
-	    };
 
-	    flash.textClass = function(_) {
-	        if (!arguments.length) { return _textClass; }
-	        _textClass = _;
-	        return flash;
-	    };
+	  var _scrollContainer = utilFunctor(select(null));
 
-	    flash.iconName = function(_) {
-	        if (!arguments.length) { return _iconName; }
-	        _iconName = _;
-	        return flash;
-	    };
+	  var _content;
 
-	    flash.iconClass = function(_) {
-	        if (!arguments.length) { return _iconClass; }
-	        _iconClass = _;
-	        return flash;
-	    };
+	  var _displayType = utilFunctor('');
 
-	    return flash;
-	}
+	  var _hasArrow = utilFunctor(true); // use pointer events on supported platforms; fallback to mouse events
 
-	function uiFullScreen(context) {
-	    var element = context.container().node();
-	    // var button = d3_select(null);
 
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	    function getFullScreenFn() {
-	        if (element.requestFullscreen) {
-	            return element.requestFullscreen;
-	        } else if (element.msRequestFullscreen) {
-	            return element.msRequestFullscreen;
-	        } else if (element.mozRequestFullScreen) {
-	            return element.mozRequestFullScreen;
-	        } else if (element.webkitRequestFullscreen) {
-	            return element.webkitRequestFullscreen;
-	        }
+	  popover.displayType = function (val) {
+	    if (arguments.length) {
+	      _displayType = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _displayType;
 	    }
+	  };
 
-
-	    function getExitFullScreenFn() {
-	        if (document.exitFullscreen) {
-	            return document.exitFullscreen;
-	        } else if (document.msExitFullscreen) {
-	            return document.msExitFullscreen;
-	        } else if (document.mozCancelFullScreen) {
-	            return document.mozCancelFullScreen;
-	        } else if (document.webkitExitFullscreen) {
-	            return document.webkitExitFullscreen;
-	        }
+	  popover.hasArrow = function (val) {
+	    if (arguments.length) {
+	      _hasArrow = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _hasArrow;
 	    }
+	  };
 
+	  popover.placement = function (val) {
+	    if (arguments.length) {
+	      _placement = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _placement;
+	    }
+	  };
 
-	    function isFullScreen() {
-	        return document.fullscreenElement ||
-	            document.mozFullScreenElement ||
-	            document.webkitFullscreenElement ||
-	            document.msFullscreenElement;
+	  popover.alignment = function (val) {
+	    if (arguments.length) {
+	      _alignment = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _alignment;
 	    }
+	  };
 
+	  popover.scrollContainer = function (val) {
+	    if (arguments.length) {
+	      _scrollContainer = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _scrollContainer;
+	    }
+	  };
 
-	    function isSupported() {
-	        return !!getFullScreenFn();
+	  popover.content = function (val) {
+	    if (arguments.length) {
+	      _content = val;
+	      return popover;
+	    } else {
+	      return _content;
 	    }
+	  };
 
+	  popover.isShown = function () {
+	    var popoverSelection = _anchorSelection.select('.popover-' + _id);
 
-	    function fullScreen() {
-	        event.preventDefault();
-	        if (!isFullScreen()) {
-	            // button.classed('active', true);
-	            getFullScreenFn().apply(element);
-	        } else {
-	            // button.classed('active', false);
-	            getExitFullScreenFn().apply(document);
-	        }
-	    }
+	    return !popoverSelection.empty() && popoverSelection.classed('in');
+	  };
 
+	  popover.show = function () {
+	    _anchorSelection.each(show);
+	  };
 
-	    return function() { // selection) {
-	        if (!isSupported()) { return; }
+	  popover.updateContent = function () {
+	    _anchorSelection.each(updateContent);
+	  };
 
-	        // button = selection.append('button')
-	        //     .attr('title', t('full_screen'))
-	        //     .attr('tabindex', -1)
-	        //     .on('click', fullScreen)
-	        //     .call(tooltip);
+	  popover.hide = function () {
+	    _anchorSelection.each(hide);
+	  };
 
-	        // button.append('span')
-	        //     .attr('class', 'icon full-screen');
+	  popover.toggle = function () {
+	    _anchorSelection.each(toggle);
+	  };
 
-	        var detected = utilDetect();
-	        var keys = (detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11']);
-	        context.keybinding().on(keys, fullScreen);
-	    };
-	}
+	  popover.destroy = function (selection, selector) {
+	    // by default, just destroy the current popover
+	    selector = selector || '.popover-' + _id;
+	    selection.on(_pointerPrefix + 'enter.popover', null).on(_pointerPrefix + 'leave.popover', null).on(_pointerPrefix + 'up.popover', null).on(_pointerPrefix + 'down.popover', null).on('click.popover', null).attr('title', function () {
+	      return this.getAttribute('data-original-title') || this.getAttribute('title');
+	    }).attr('data-original-title', null).selectAll(selector).remove();
+	  };
 
-	function uiGeolocate(context) {
-	    var _geolocationOptions = {
-	        // prioritize speed and power usage over precision
-	        enableHighAccuracy: false,
-	        // don't hang indefinitely getting the location
-	        timeout: 6000 // 6sec
-	    };
-	    var _locating = uiLoading(context).message(_t('geolocate.locating')).blocking(true);
-	    var _layer = context.layers().layer('geolocate');
-	    var _position;
-	    var _extent;
-	    var _timeoutID;
-	    var _button = select(null);
+	  popover.destroyAny = function (selection) {
+	    selection.call(popover.destroy, '.popover');
+	  };
 
-	    function click() {
-	        if (context.inIntro()) { return; }
-	        if (!_layer.enabled() && !_locating.isShown()) {
+	  function setup() {
+	    var anchor = select(this);
 
-	            // This timeout ensures that we still call finish() even if
-	            // the user declines to share their location in Firefox
-	            _timeoutID = setTimeout(error, 10000 /* 10sec */ );
+	    var animate = _animation.apply(this, arguments);
 
-	            context.container().call(_locating);
-	            // get the latest position even if we already have one
-	            navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
-	        } else {
-	            _locating.close();
-	            _layer.enabled(null, false);
-	            updateButtonState();
-	        }
+	    var popoverSelection = anchor.selectAll('.popover-' + _id).data([0]);
+	    var enter = popoverSelection.enter().append('div').attr('class', 'popover popover-' + _id + ' ' + (klass ? klass : '')).classed('arrowed', _hasArrow.apply(this, arguments));
+	    enter.append('div').attr('class', 'popover-arrow');
+	    enter.append('div').attr('class', 'popover-inner');
+	    popoverSelection = enter.merge(popoverSelection);
+
+	    if (animate) {
+	      popoverSelection.classed('fade', true);
 	    }
 
-	    function zoomTo() {
-	        context.enter(modeBrowse(context));
+	    var display = _displayType.apply(this, arguments);
 
-	        var map = context.map();
-	        _layer.enabled(_position, true);
-	        updateButtonState();
-	        map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
-	    }
+	    if (display === 'hover') {
+	      var _lastNonMouseEnterTime;
+
+	      anchor.on(_pointerPrefix + 'enter.popover', function (d3_event) {
+	        if (d3_event.pointerType) {
+	          if (d3_event.pointerType !== 'mouse') {
+	            _lastNonMouseEnterTime = d3_event.timeStamp; // only allow hover behavior for mouse input
 
-	    function success(geolocation) {
-	        _position = geolocation;
-	        var coords = _position.coords;
-	        _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
-	        zoomTo();
-	        finish();
+	            return;
+	          } else if (_lastNonMouseEnterTime && d3_event.timeStamp - _lastNonMouseEnterTime < 1500) {
+	            // HACK: iOS 13.4 sends an erroneous `mouse` type pointerenter
+	            // event for non-mouse interactions right after sending
+	            // the correct type pointerenter event. Workaround by discarding
+	            // any mouse event that occurs immediately after a non-mouse event.
+	            return;
+	          }
+	        } // don't show if buttons are pressed, e.g. during click and drag of map
+
+
+	        if (d3_event.buttons !== 0) return;
+	        show.apply(this, arguments);
+	      }).on(_pointerPrefix + 'leave.popover', function () {
+	        hide.apply(this, arguments);
+	      }) // show on focus too for better keyboard navigation support
+	      .on('focus.popover', function () {
+	        show.apply(this, arguments);
+	      }).on('blur.popover', function () {
+	        hide.apply(this, arguments);
+	      });
+	    } else if (display === 'clickFocus') {
+	      anchor.on(_pointerPrefix + 'down.popover', function (d3_event) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	      }).on(_pointerPrefix + 'up.popover', function (d3_event) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	      }).on('click.popover', toggle);
+	      popoverSelection // This attribute lets the popover take focus
+	      .attr('tabindex', 0).on('blur.popover', function () {
+	        anchor.each(function () {
+	          hide.apply(this, arguments);
+	        });
+	      });
 	    }
+	  }
 
-	    function error() {
-	        if (_position) {
-	            // use the position from a previous call if we have one
-	            zoomTo();
-	        } else {
-	            context.ui().flash
-	                .text(_t('geolocate.location_unavailable'))
-	                .iconName('#iD-icon-geolocate')();
-	        }
+	  function show() {
+	    var anchor = select(this);
+	    var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-	        finish();
+	    if (popoverSelection.empty()) {
+	      // popover was removed somehow, put it back
+	      anchor.call(popover.destroy);
+	      anchor.each(setup);
+	      popoverSelection = anchor.selectAll('.popover-' + _id);
 	    }
 
-	    function finish() {
-	        _locating.close();  // unblock ui
-	        if (_timeoutID) { clearTimeout(_timeoutID); }
-	        _timeoutID = undefined;
+	    popoverSelection.classed('in', true);
+
+	    var displayType = _displayType.apply(this, arguments);
+
+	    if (displayType === 'clickFocus') {
+	      anchor.classed('active', true);
+	      popoverSelection.node().focus();
 	    }
 
-	    function updateButtonState() {
-	        _button.classed('active', _layer.enabled());
+	    anchor.each(updateContent);
+	  }
+
+	  function updateContent() {
+	    var anchor = select(this);
+
+	    if (_content) {
+	      anchor.selectAll('.popover-' + _id + ' > .popover-inner').call(_content.apply(this, arguments));
 	    }
 
-	    return function(selection) {
-	        if (!navigator.geolocation || !navigator.geolocation.getCurrentPosition) { return; }
+	    updatePosition.apply(this, arguments); // hack: update multiple times to fix instances where the absolute offset is
+	    // set before the dynamic popover size is calculated by the browser
 
-	        _button = selection
-	            .append('button')
-	            .on('click', click)
-	            .call(svgIcon('#iD-icon-geolocate', 'light'))
-	            .call(uiTooltip()
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	                .title(_t('geolocate.title'))
-	                .keys([_t('geolocate.key')])
-	            );
+	    updatePosition.apply(this, arguments);
+	    updatePosition.apply(this, arguments);
+	  }
 
-	        context.keybinding().on(_t('geolocate.key'), click);
-	    };
-	}
+	  function updatePosition() {
+	    var anchor = select(this);
+	    var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-	function uiPanelBackground(context) {
-	    var background = context.background();
-	    var currSourceName = null;
-	    var metadata = {};
-	    var metadataKeys = [
-	        'zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'
-	    ];
+	    var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
 
-	    var debouncedRedraw = debounce(redraw, 250);
+	    var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
+	    var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
+	    var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
 
-	    function redraw(selection) {
-	        var source = background.baseLayerSource();
-	        if (!source) { return; }
+	    var placement = _placement.apply(this, arguments);
 
-	        var isDG = (source.id.match(/^DigitalGlobe/i) !== null);
+	    popoverSelection.classed('left', false).classed('right', false).classed('top', false).classed('bottom', false).classed(placement, true);
 
-	        if (currSourceName !== source.name()) {
-	            currSourceName = source.name();
-	            metadata = {};
-	        }
+	    var alignment = _alignment.apply(this, arguments);
 
-	        selection.html('');
+	    var alignFactor = 0.5;
 
-	        var list = selection
-	            .append('ul')
-	            .attr('class', 'background-info');
-
-	        list
-	            .append('li')
-	            .text(currSourceName);
-
-	        metadataKeys.forEach(function(k) {
-	            // DigitalGlobe vintage is available in raster layers for now.
-	            if (isDG && k === 'vintage') { return; }
-
-	            list
-	                .append('li')
-	                .attr('class', 'background-info-list-' + k)
-	                .classed('hide', !metadata[k])
-	                .text(_t('info_panels.background.' + k) + ':')
-	                .append('span')
-	                .attr('class', 'background-info-span-' + k)
-	                .text(metadata[k]);
-	        });
+	    if (alignment === 'leading') {
+	      alignFactor = 0;
+	    } else if (alignment === 'trailing') {
+	      alignFactor = 1;
+	    }
 
-	        debouncedGetMetadata(selection);
+	    var anchorFrame = getFrame(anchor.node());
+	    var popoverFrame = getFrame(popoverSelection.node());
+	    var position;
 
-	        var toggleTiles = context.getDebug('tile') ? 'hide_tiles' : 'show_tiles';
+	    switch (placement) {
+	      case 'top':
+	        position = {
+	          x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+	          y: anchorFrame.y - popoverFrame.h
+	        };
+	        break;
 
-	        selection
-	            .append('a')
-	            .text(_t('info_panels.background.' + toggleTiles))
-	            .attr('href', '#')
-	            .attr('class', 'button button-toggle-tiles')
-	            .on('click', function() {
-	                event.preventDefault();
-	                context.setDebug('tile', !context.getDebug('tile'));
-	                selection.call(redraw);
-	            });
+	      case 'bottom':
+	        position = {
+	          x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+	          y: anchorFrame.y + anchorFrame.h
+	        };
+	        break;
 
-	        if (isDG) {
-	            var key = source.id + '-vintage';
-	            var sourceVintage = context.background().findSource(key);
-	            var showsVintage = context.background().showsLayer(sourceVintage);
-	            var toggleVintage = showsVintage ? 'hide_vintage' : 'show_vintage';
-	            selection
-	                .append('a')
-	                .text(_t('info_panels.background.' + toggleVintage))
-	                .attr('href', '#')
-	                .attr('class', 'button button-toggle-vintage')
-	                .on('click', function() {
-	                    event.preventDefault();
-	                    context.background().toggleOverlayLayer(sourceVintage);
-	                    selection.call(redraw);
-	                });
-	        }
+	      case 'left':
+	        position = {
+	          x: anchorFrame.x - popoverFrame.w,
+	          y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+	        };
+	        break;
 
-	        // disable if necessary
-	        ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function(layerId) {
-	            if (source.id !== layerId) {
-	                var key = layerId + '-vintage';
-	                var sourceVintage = context.background().findSource(key);
-	                if (context.background().showsLayer(sourceVintage)) {
-	                    context.background().toggleOverlayLayer(sourceVintage);
-	                }
-	            }
-	        });
+	      case 'right':
+	        position = {
+	          x: anchorFrame.x + anchorFrame.w,
+	          y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+	        };
+	        break;
 	    }
 
+	    if (position) {
+	      if (scrollNode && (placement === 'top' || placement === 'bottom')) {
+	        var initialPosX = position.x;
 
-	    var debouncedGetMetadata = debounce(getMetadata, 250);
+	        if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
+	          position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
+	        } else if (position.x < 10) {
+	          position.x = 10;
+	        }
 
-	    function getMetadata(selection) {
-	        var tile = context.container().select('.layer-background img.tile-center');   // tile near viewport center
-	        if (tile.empty()) { return; }
+	        var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow'); // keep the arrow centered on the button, or as close as possible
 
-	        var sourceName = currSourceName;
-	        var d = tile.datum();
-	        var zoom = (d && d.length >= 3 && d[2]) || Math.floor(context.map().zoom());
-	        var center = context.map().center();
+	        var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
+	        arrow.style('left', ~~arrowPosX + 'px');
+	      }
 
-	        // update zoom
-	        metadata.zoom = String(zoom);
-	        selection.selectAll('.background-info-list-zoom')
-	            .classed('hide', false)
-	            .selectAll('.background-info-span-zoom')
-	            .text(metadata.zoom);
-
-	        if (!d || !d.length >= 3) { return; }
-
-	        background.baseLayerSource().getMetadata(center, d, function(err, result) {
-	            if (err || currSourceName !== sourceName) { return; }
-
-	            // update vintage
-	            var vintage = result.vintage;
-	            metadata.vintage = (vintage && vintage.range) || _t('info_panels.background.unknown');
-	            selection.selectAll('.background-info-list-vintage')
-	                .classed('hide', false)
-	                .selectAll('.background-info-span-vintage')
-	                .text(metadata.vintage);
-
-	            // update other metdata
-	            metadataKeys.forEach(function(k) {
-	                if (k === 'zoom' || k === 'vintage') { return; }  // done already
-	                var val = result[k];
-	                metadata[k] = val;
-	                selection.selectAll('.background-info-list-' + k)
-	                    .classed('hide', !val)
-	                    .selectAll('.background-info-span-' + k)
-	                    .text(val);
-	            });
-	        });
+	      popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
+	    } else {
+	      popoverSelection.style('left', null).style('top', null);
 	    }
 
+	    function getFrame(node) {
+	      var positionStyle = select(node).style('position');
 
-	    var panel = function(selection) {
-	        selection.call(redraw);
-
-	        context.map()
-	            .on('drawn.info-background', function() {
-	                selection.call(debouncedRedraw);
-	            })
-	            .on('move.info-background', function() {
-	                selection.call(debouncedGetMetadata);
-	            });
+	      if (positionStyle === 'absolute' || positionStyle === 'static') {
+	        return {
+	          x: node.offsetLeft - scrollLeft,
+	          y: node.offsetTop - scrollTop,
+	          w: node.offsetWidth,
+	          h: node.offsetHeight
+	        };
+	      } else {
+	        return {
+	          x: 0,
+	          y: 0,
+	          w: node.offsetWidth,
+	          h: node.offsetHeight
+	        };
+	      }
+	    }
+	  }
 
-	    };
+	  function hide() {
+	    var anchor = select(this);
 
-	    panel.off = function() {
-	        context.map()
-	            .on('drawn.info-background', null)
-	            .on('move.info-background', null);
-	    };
+	    if (_displayType.apply(this, arguments) === 'clickFocus') {
+	      anchor.classed('active', false);
+	    }
 
-	    panel.id = 'background';
-	    panel.title = _t('info_panels.background.title');
-	    panel.key = _t('info_panels.background.key');
+	    anchor.selectAll('.popover-' + _id).classed('in', false);
+	  }
 
+	  function toggle() {
+	    if (select(this).select('.popover-' + _id).classed('in')) {
+	      hide.apply(this, arguments);
+	    } else {
+	      show.apply(this, arguments);
+	    }
+	  }
 
-	    return panel;
+	  return popover;
 	}
 
-	function uiPanelHistory(context) {
-	    var osm;
+	function uiTooltip(klass) {
+	  var tooltip = uiPopover((klass || '') + ' tooltip').displayType('hover');
 
-	    function displayTimestamp(timestamp) {
-	        if (!timestamp) { return _t('info_panels.history.unknown'); }
-	        var options = {
-	            day: 'numeric', month: 'short', year: 'numeric',
-	            hour: 'numeric', minute: 'numeric', second: 'numeric'
-	        };
-	        var d = new Date(timestamp);
-	        if (isNaN(d.getTime())) { return _t('info_panels.history.unknown'); }
-	        return d.toLocaleString(_mainLocalizer.localeCode(), options);
+	  var _title = function _title() {
+	    var title = this.getAttribute('data-original-title');
+
+	    if (title) {
+	      return title;
+	    } else {
+	      title = this.getAttribute('title');
+	      this.removeAttribute('title');
+	      this.setAttribute('data-original-title', title);
 	    }
 
+	    return title;
+	  };
 
-	    function displayUser(selection, userName) {
-	        if (!userName) {
-	            selection
-	                .append('span')
-	                .text(_t('info_panels.history.unknown'));
-	            return;
-	        }
+	  var _heading = utilFunctor(null);
 
-	        selection
-	            .append('span')
-	            .attr('class', 'user-name')
-	            .text(userName);
+	  var _keys = utilFunctor(null);
 
-	        var links = selection
-	            .append('div')
-	            .attr('class', 'links');
+	  tooltip.title = function (val) {
+	    if (!arguments.length) return _title;
+	    _title = utilFunctor(val);
+	    return tooltip;
+	  };
 
-	        if (osm) {
-	            links
-	                .append('a')
-	                .attr('class', 'user-osm-link')
-	                .attr('href', osm.userURL(userName))
-	                .attr('target', '_blank')
-	                .attr('tabindex', -1)
-	                .text('OSM');
-	        }
-
-	        links
-	            .append('a')
-	            .attr('class', 'user-hdyc-link')
-	            .attr('href', 'https://hdyc.neis-one.org/?' + userName)
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .text('HDYC');
-	    }
-
-
-	    function displayChangeset(selection, changeset) {
-	        if (!changeset) {
-	            selection
-	                .append('span')
-	                .text(_t('info_panels.history.unknown'));
-	            return;
-	        }
+	  tooltip.heading = function (val) {
+	    if (!arguments.length) return _heading;
+	    _heading = utilFunctor(val);
+	    return tooltip;
+	  };
 
-	        selection
-	            .append('span')
-	            .attr('class', 'changeset-id')
-	            .text(changeset);
+	  tooltip.keys = function (val) {
+	    if (!arguments.length) return _keys;
+	    _keys = utilFunctor(val);
+	    return tooltip;
+	  };
 
-	        var links = selection
-	            .append('div')
-	            .attr('class', 'links');
+	  tooltip.content(function () {
+	    var heading = _heading.apply(this, arguments);
 
-	        if (osm) {
-	            links
-	                .append('a')
-	                .attr('class', 'changeset-osm-link')
-	                .attr('href', osm.changesetURL(changeset))
-	                .attr('target', '_blank')
-	                .attr('tabindex', -1)
-	                .text('OSM');
-	        }
-
-	        links
-	            .append('a')
-	            .attr('class', 'changeset-osmcha-link')
-	            .attr('href', 'https://osmcha.org/changesets/' + changeset)
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .text('OSMCha');
-
-	        links
-	            .append('a')
-	            .attr('class', 'changeset-achavi-link')
-	            .attr('href', 'https://overpass-api.de/achavi/?changeset=' + changeset)
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .text('Achavi');
-	    }
-
-
-	    function redraw(selection) {
-	        var selectedNoteID = context.selectedNoteID();
-	        osm = context.connection();
-
-	        var selected, note, entity;
-	        if (selectedNoteID && osm) {       // selected 1 note
-	            selected = [ _t('note.note') + ' ' + selectedNoteID ];
-	            note = osm.getNote(selectedNoteID);
-	        } else {                           // selected 1..n entities
-	            selected = context.selectedIDs()
-	                .filter(function(e) { return context.hasEntity(e); });
-	            if (selected.length) {
-	                entity = context.entity(selected[0]);
-	            }
-	        }
+	    var text = _title.apply(this, arguments);
 
-	        var singular = selected.length === 1 ? selected[0] : null;
+	    var keys = _keys.apply(this, arguments);
 
-	        selection.html('');
+	    return function (selection) {
+	      var headingSelect = selection.selectAll('.tooltip-heading').data(heading ? [heading] : []);
+	      headingSelect.exit().remove();
+	      headingSelect.enter().append('div').attr('class', 'tooltip-heading').merge(headingSelect).html(heading);
+	      var textSelect = selection.selectAll('.tooltip-text').data(text ? [text] : []);
+	      textSelect.exit().remove();
+	      textSelect.enter().append('div').attr('class', 'tooltip-text').merge(textSelect).html(text);
+	      var keyhintWrap = selection.selectAll('.keyhint-wrap').data(keys && keys.length ? [0] : []);
+	      keyhintWrap.exit().remove();
+	      var keyhintWrapEnter = keyhintWrap.enter().append('div').attr('class', 'keyhint-wrap');
+	      keyhintWrapEnter.append('span').call(_t.append('tooltip_keyhint'));
+	      keyhintWrap = keyhintWrapEnter.merge(keyhintWrap);
+	      keyhintWrap.selectAll('kbd.shortcut').data(keys && keys.length ? keys : []).enter().append('kbd').attr('class', 'shortcut').html(function (d) {
+	        return d;
+	      });
+	    };
+	  });
+	  return tooltip;
+	}
 
-	        selection
-	            .append('h4')
-	            .attr('class', 'history-heading')
-	            .text(singular || _t('info_panels.history.selected', { n: selected.length }));
+	function uiEditMenu(context) {
+	  var dispatch = dispatch$8('toggled');
 
-	        if (!singular) { return; }
+	  var _menu = select(null);
 
-	        if (entity) {
-	            selection.call(redrawEntity, entity);
-	        } else if (note) {
-	            selection.call(redrawNote, note);
-	        }
-	    }
+	  var _operations = []; // the position the menu should be displayed relative to
 
+	  var _anchorLoc = [0, 0];
+	  var _anchorLocLonLat = [0, 0]; // a string indicating how the menu was opened
 
-	    function redrawNote(selection, note) {
-	        if (!note || note.isNew()) {
-	            selection
-	                .append('div')
-	                .text(_t('info_panels.history.note_no_history'));
-	            return;
-	        }
+	  var _triggerType = '';
+	  var _vpTopMargin = 85; // viewport top margin
 
-	        var list = selection
-	            .append('ul');
+	  var _vpBottomMargin = 45; // viewport bottom margin
 
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.note_comments') + ':')
-	            .append('span')
-	            .text(note.comments.length);
+	  var _vpSideMargin = 35; // viewport side margin
 
-	        if (note.comments.length) {
-	            list
-	                .append('li')
-	                .text(_t('info_panels.history.note_created_date') + ':')
-	                .append('span')
-	                .text(displayTimestamp(note.comments[0].date));
+	  var _menuTop = false;
 
-	            list
-	                .append('li')
-	                .text(_t('info_panels.history.note_created_user') + ':')
-	                .call(displayUser, note.comments[0].user);
-	        }
+	  var _menuHeight;
 
-	        if (osm) {
-	            selection
-	                .append('a')
-	                .attr('class', 'view-history-on-osm')
-	                .attr('target', '_blank')
-	                .attr('tabindex', -1)
-	                .attr('href', osm.noteURL(note))
-	                .call(svgIcon('#iD-icon-out-link', 'inline'))
-	                .append('span')
-	                .text(_t('info_panels.history.note_link_text'));
-	        }
-	    }
+	  var _menuWidth; // hardcode these values to make menu positioning easier
 
 
-	    function redrawEntity(selection, entity) {
-	        if (!entity || entity.isNew()) {
-	            selection
-	                .append('div')
-	                .text(_t('info_panels.history.no_history'));
-	            return;
-	        }
+	  var _verticalPadding = 4; // see also `.edit-menu .tooltip` CSS; include margin
 
-	        var links = selection
-	            .append('div')
-	            .attr('class', 'links');
+	  var _tooltipWidth = 210; // offset the menu slightly from the target location
 
-	        if (osm) {
-	            links
-	                .append('a')
-	                .attr('class', 'view-history-on-osm')
-	                .attr('href', osm.historyURL(entity))
-	                .attr('target', '_blank')
-	                .attr('tabindex', -1)
-	                .attr('title', _t('info_panels.history.link_text'))
-	                .text('OSM');
-	        }
-	        links
-	            .append('a')
-	            .attr('class', 'pewu-history-viewer-link')
-	            .attr('href', 'https://pewu.github.io/osm-history/#/' + entity.type + '/' + entity.osmId())
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .text('PeWu');
-
-	        var list = selection
-	            .append('ul');
-
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.version') + ':')
-	            .append('span')
-	            .text(entity.version);
-
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.last_edit') + ':')
-	            .append('span')
-	            .text(displayTimestamp(entity.timestamp));
-
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.edited_by') + ':')
-	            .call(displayUser, entity.user);
-
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.changeset') + ':')
-	            .call(displayChangeset, entity.changeset);
-	    }
-
-
-	    var panel = function(selection) {
-	        selection.call(redraw);
+	  var _menuSideMargin = 10;
+	  var _tooltips = [];
 
-	        context.map()
-	            .on('drawn.info-history', function() {
-	                selection.call(redraw);
-	            });
+	  var editMenu = function editMenu(selection) {
+	    var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
 
-	        context
-	            .on('enter.info-history', function() {
-	                selection.call(redraw);
-	            });
-	    };
+	    var ops = _operations.filter(function (op) {
+	      return !isTouchMenu || !op.mouseOnly;
+	    });
 
-	    panel.off = function() {
-	        context.map().on('drawn.info-history', null);
-	        context.on('enter.info-history', null);
-	    };
+	    if (!ops.length) return;
+	    _tooltips = []; // Position the menu above the anchor for stylus and finger input
+	    // since the mapper's hand likely obscures the screen below the anchor
 
-	    panel.id = 'history';
-	    panel.title = _t('info_panels.history.title');
-	    panel.key = _t('info_panels.history.key');
+	    _menuTop = isTouchMenu; // Show labels for touch input since there aren't hover tooltips
 
+	    var showLabels = isTouchMenu;
+	    var buttonHeight = showLabels ? 32 : 34;
 
-	    return panel;
-	}
+	    if (showLabels) {
+	      // Get a general idea of the width based on the length of the label
+	      _menuWidth = 52 + Math.min(120, 6 * Math.max.apply(Math, ops.map(function (op) {
+	        return op.title.length;
+	      })));
+	    } else {
+	      _menuWidth = 44;
+	    }
 
-	var OSM_PRECISION = 7;
+	    _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
+	    _menu = selection.append('div').attr('class', 'edit-menu').classed('touch-menu', isTouchMenu).style('padding', _verticalPadding + 'px 0');
 
-	/**
-	 * Returns a localized representation of the given length measurement.
-	 *
-	 * @param {Number} m area in meters
-	 * @param {Boolean} isImperial true for U.S. customary units; false for metric
-	 */
-	function displayLength(m, isImperial) {
-	    var d = m * (isImperial ? 3.28084 : 1);
-	    var unit;
+	    var buttons = _menu.selectAll('.edit-menu-item').data(ops); // enter
 
-	    if (isImperial) {
-	        if (d >= 5280) {
-	            d /= 5280;
-	            unit = 'miles';
-	        } else {
-	            unit = 'feet';
-	        }
-	    } else {
-	        if (d >= 1000) {
-	            d /= 1000;
-	            unit = 'kilometers';
-	        } else {
-	            unit = 'meters';
-	        }
-	    }
 
-	    return _t('units.' + unit, {
-	        quantity: d.toLocaleString(_mainLocalizer.localeCode(), {
-	            maximumSignificantDigits: 4
-	        })
+	    var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
+	      return 'edit-menu-item edit-menu-item-' + d.id;
+	    }).style('height', buttonHeight + 'px').on('click', click) // don't listen for `mouseup` because we only care about non-mouse pointer types
+	    .on('pointerup', pointerup).on('pointerdown mousedown', function pointerdown(d3_event) {
+	      // don't let button presses also act as map input - #1869
+	      d3_event.stopPropagation();
+	    }).on('mouseenter.highlight', function (d3_event, d) {
+	      if (!d.relatedEntityIds || select(this).classed('disabled')) return;
+	      utilHighlightEntities(d.relatedEntityIds(), true, context);
+	    }).on('mouseleave.highlight', function (d3_event, d) {
+	      if (!d.relatedEntityIds) return;
+	      utilHighlightEntities(d.relatedEntityIds(), false, context);
 	    });
-	}
+	    buttonsEnter.each(function (d) {
+	      var tooltip = uiTooltip().heading(d.title).title(d.tooltip()).keys([d.keys[0]]);
 
-	/**
-	 * Returns a localized representation of the given area measurement.
-	 *
-	 * @param {Number} m2 area in square meters
-	 * @param {Boolean} isImperial true for U.S. customary units; false for metric
-	 */
-	function displayArea(m2, isImperial) {
-	    var locale = _mainLocalizer.localeCode();
-	    var d = m2 * (isImperial ? 10.7639111056 : 1);
-	    var d1, d2, area;
-	    var unit1 = '';
-	    var unit2 = '';
+	      _tooltips.push(tooltip);
 
-	    if (isImperial) {
-	        if (d >= 6969600) { // > 0.25mi² show mi²
-	            d1 = d / 27878400;
-	            unit1 = 'square_miles';
-	        } else {
-	            d1 = d;
-	            unit1 = 'square_feet';
-	        }
+	      select(this).call(tooltip).append('div').attr('class', 'icon-wrap').call(svgIcon(d.icon && d.icon() || '#iD-operation-' + d.id, 'operation'));
+	    });
 
-	        if (d > 4356 && d < 43560000) { // 0.1 - 1000 acres
-	            d2 = d / 43560;
-	            unit2 = 'acres';
-	        }
+	    if (showLabels) {
+	      buttonsEnter.append('span').attr('class', 'label').html(function (d) {
+	        return d.title;
+	      });
+	    } // update
 
-	    } else {
-	        if (d >= 250000) { // > 0.25km² show km²
-	            d1 = d / 1000000;
-	            unit1 = 'square_kilometers';
-	        } else {
-	            d1 = d;
-	            unit1 = 'square_meters';
-	        }
 
-	        if (d > 1000 && d < 10000000) { // 0.1 - 1000 hectares
-	            d2 = d / 10000;
-	            unit2 = 'hectares';
-	        }
+	    buttonsEnter.merge(buttons).classed('disabled', function (d) {
+	      return d.disabled();
+	    });
+	    updatePosition();
+	    var initialScale = context.projection.scale();
+	    context.map().on('move.edit-menu', function () {
+	      if (initialScale !== context.projection.scale()) {
+	        editMenu.close();
+	      }
+	    }).on('drawn.edit-menu', function (info) {
+	      if (info.full) updatePosition();
+	    });
+	    var lastPointerUpType; // `pointerup` is always called before `click`
+
+	    function pointerup(d3_event) {
+	      lastPointerUpType = d3_event.pointerType;
 	    }
 
-	    area = _t('units.' + unit1, {
-	        quantity: d1.toLocaleString(locale, {
-	            maximumSignificantDigits: 4
-	        })
-	    });
+	    function click(d3_event, operation) {
+	      d3_event.stopPropagation();
 
-	    if (d2) {
-	        return _t('units.area_pair', {
-	            area1: area,
-	            area2: _t('units.' + unit2, {
-	                quantity: d2.toLocaleString(locale, {
-	                    maximumSignificantDigits: 2
-	                })
-	            })
-	        });
-	    } else {
-	        return area;
+	      if (operation.relatedEntityIds) {
+	        utilHighlightEntities(operation.relatedEntityIds(), false, context);
+	      }
+
+	      if (operation.disabled()) {
+	        if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+	          // there are no tooltips for touch interactions so flash feedback instead
+	          context.ui().flash.duration(4000).iconName('#iD-operation-' + operation.id).iconClass('operation disabled').label(operation.tooltip)();
+	        }
+	      } else {
+	        if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+	          context.ui().flash.duration(2000).iconName('#iD-operation-' + operation.id).iconClass('operation').label(operation.annotation() || operation.title)();
+	        }
+
+	        operation();
+	        editMenu.close();
+	      }
+
+	      lastPointerUpType = null;
 	    }
-	}
 
-	function wrap(x, min, max) {
-	    var d = max - min;
-	    return ((x - min) % d + d) % d + min;
-	}
+	    dispatch.call('toggled', this, true);
+	  };
 
-	function clamp$1(x, min, max) {
-	    return Math.max(min, Math.min(x, max));
-	}
+	  function updatePosition() {
+	    if (!_menu || _menu.empty()) return;
+	    var anchorLoc = context.projection(_anchorLocLonLat);
+	    var viewport = context.surfaceRect();
 
-	function displayCoordinate(deg, pos, neg) {
-	    var locale = _mainLocalizer.localeCode();
-	    var min = (Math.abs(deg) - Math.floor(Math.abs(deg))) * 60;
-	    var sec = (min - Math.floor(min)) * 60;
-	    var displayDegrees = _t('units.arcdegrees', {
-	        quantity: Math.floor(Math.abs(deg)).toLocaleString(locale)
-	    });
-	    var displayCoordinate;
-
-	    if (Math.floor(sec) > 0) {
-	        displayCoordinate = displayDegrees +
-	            _t('units.arcminutes', {
-	                quantity: Math.floor(min).toLocaleString(locale)
-	            }) +
-	            _t('units.arcseconds', {
-	                quantity: Math.round(sec).toLocaleString(locale)
-	            });
-	    } else if (Math.floor(min) > 0) {
-	        displayCoordinate = displayDegrees +
-	            _t('units.arcminutes', {
-	                quantity: Math.round(min).toLocaleString(locale)
-	            });
-	    } else {
-	        displayCoordinate = _t('units.arcdegrees', {
-	            quantity: Math.round(Math.abs(deg)).toLocaleString(locale)
-	        });
+	    if (anchorLoc[0] < 0 || anchorLoc[0] > viewport.width || anchorLoc[1] < 0 || anchorLoc[1] > viewport.height) {
+	      // close the menu if it's gone offscreen
+	      editMenu.close();
+	      return;
 	    }
 
-	    if (deg === 0) {
-	        return displayCoordinate;
+	    var menuLeft = displayOnLeft(viewport);
+	    var offset = [0, 0];
+	    offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
+
+	    if (_menuTop) {
+	      if (anchorLoc[1] - _menuHeight < _vpTopMargin) {
+	        // menu is near top viewport edge, shift downward
+	        offset[1] = -anchorLoc[1] + _vpTopMargin;
+	      } else {
+	        offset[1] = -_menuHeight;
+	      }
 	    } else {
-	        return _t('units.coordinate', {
-	            coordinate: displayCoordinate,
-	            direction: _t('units.' + (deg > 0 ? pos : neg))
-	        });
+	      if (anchorLoc[1] + _menuHeight > viewport.height - _vpBottomMargin) {
+	        // menu is near bottom viewport edge, shift upwards
+	        offset[1] = -anchorLoc[1] - _menuHeight + viewport.height - _vpBottomMargin;
+	      } else {
+	        offset[1] = 0;
+	      }
 	    }
-	}
 
-	/**
-	 * Returns given coordinate pair in degree-minute-second format.
-	 *
-	 * @param {Array<Number>} coord longitude and latitude
-	 */
-	function dmsCoordinatePair(coord) {
-	    return _t('units.coordinate_pair', {
-	        latitude: displayCoordinate(clamp$1(coord[1], -90, 90), 'north', 'south'),
-	        longitude: displayCoordinate(wrap(coord[0], -180, 180), 'east', 'west')
-	    });
-	}
+	    var origin = geoVecAdd(anchorLoc, offset);
 
-	/**
-	 * Returns the given coordinate pair in decimal format.
-	 * note: unlocalized to avoid comma ambiguity - see #4765
-	 *
-	 * @param {Array<Number>} coord longitude and latitude
-	 */
-	function decimalCoordinatePair(coord) {
-	    return _t('units.coordinate_pair', {
-	        latitude: clamp$1(coord[1], -90, 90).toFixed(OSM_PRECISION),
-	        longitude: wrap(coord[0], -180, 180).toFixed(OSM_PRECISION)
+	    _menu.style('left', origin[0] + 'px').style('top', origin[1] + 'px');
+
+	    var tooltipSide = tooltipPosition(viewport, menuLeft);
+
+	    _tooltips.forEach(function (tooltip) {
+	      tooltip.placement(tooltipSide);
 	    });
-	}
 
-	function uiPanelLocation(context) {
-	    var currLocation = '';
+	    function displayOnLeft(viewport) {
+	      if (_mainLocalizer.textDirection() === 'ltr') {
+	        if (anchorLoc[0] + _menuSideMargin + _menuWidth > viewport.width - _vpSideMargin) {
+	          // right menu would be too close to the right viewport edge, go left
+	          return true;
+	        } // prefer right menu
 
 
-	    function redraw(selection) {
-	        selection.html('');
+	        return false;
+	      } else {
+	        // rtl
+	        if (anchorLoc[0] - _menuSideMargin - _menuWidth < _vpSideMargin) {
+	          // left menu would be too close to the left viewport edge, go right
+	          return false;
+	        } // prefer left menu
+
+
+	        return true;
+	      }
+	    }
+
+	    function tooltipPosition(viewport, menuLeft) {
+	      if (_mainLocalizer.textDirection() === 'ltr') {
+	        if (menuLeft) {
+	          // if there's not room for a right-side menu then there definitely
+	          // isn't room for right-side tooltips
+	          return 'left';
+	        }
 
-	        var list = selection
-	            .append('ul');
+	        if (anchorLoc[0] + _menuSideMargin + _menuWidth + _tooltipWidth > viewport.width - _vpSideMargin) {
+	          // right tooltips would be too close to the right viewport edge, go left
+	          return 'left';
+	        } // prefer right tooltips
 
-	        // Mouse coordinates
-	        var coord = context.map().mouseCoordinates();
-	        if (coord.some(isNaN)) {
-	            coord = context.map().center();
+
+	        return 'right';
+	      } else {
+	        // rtl
+	        if (!menuLeft) {
+	          return 'right';
 	        }
 
-	        list
-	            .append('li')
-	            .text(dmsCoordinatePair(coord))
-	            .append('li')
-	            .text(decimalCoordinatePair(coord));
+	        if (anchorLoc[0] - _menuSideMargin - _menuWidth - _tooltipWidth < _vpSideMargin) {
+	          // left tooltips would be too close to the left viewport edge, go right
+	          return 'right';
+	        } // prefer left tooltips
 
-	        // Location Info
-	        selection
-	            .append('div')
-	            .attr('class', 'location-info')
-	            .text(currLocation || ' ');
 
-	        debouncedGetLocation(selection, coord);
+	        return 'left';
+	      }
 	    }
+	  }
 
+	  editMenu.close = function () {
+	    context.map().on('move.edit-menu', null).on('drawn.edit-menu', null);
 
-	    var debouncedGetLocation = debounce(getLocation, 250);
-	    function getLocation(selection, coord) {
-	        if (!services.geocoder) {
-	            currLocation = _t('info_panels.location.unknown_location');
-	            selection.selectAll('.location-info')
-	                .text(currLocation);
-	        } else {
-	            services.geocoder.reverse(coord, function(err, result) {
-	                currLocation = result ? result.display_name : _t('info_panels.location.unknown_location');
-	                selection.selectAll('.location-info')
-	                    .text(currLocation);
-	            });
-	        }
+	    _menu.remove();
+
+	    _tooltips = [];
+	    dispatch.call('toggled', this, false);
+	  };
+
+	  editMenu.anchorLoc = function (val) {
+	    if (!arguments.length) return _anchorLoc;
+	    _anchorLoc = val;
+	    _anchorLocLonLat = context.projection.invert(_anchorLoc);
+	    return editMenu;
+	  };
+
+	  editMenu.triggerType = function (val) {
+	    if (!arguments.length) return _triggerType;
+	    _triggerType = val;
+	    return editMenu;
+	  };
+
+	  editMenu.operations = function (val) {
+	    if (!arguments.length) return _operations;
+	    _operations = val;
+	    return editMenu;
+	  };
+
+	  return utilRebind(editMenu, dispatch, 'on');
+	}
+
+	function uiFeatureInfo(context) {
+	  function update(selection) {
+	    var features = context.features();
+	    var stats = features.stats();
+	    var count = 0;
+	    var hiddenList = features.hidden().map(function (k) {
+	      if (stats[k]) {
+	        count += stats[k];
+	        return _t.html('inspector.title_count', {
+	          title: {
+	            html: _t.html('feature.' + k + '.description')
+	          },
+	          count: stats[k]
+	        });
+	      }
+
+	      return null;
+	    }).filter(Boolean);
+	    selection.html('');
+
+	    if (hiddenList.length) {
+	      var tooltipBehavior = uiTooltip().placement('top').title(function () {
+	        return hiddenList.join('<br/>');
+	      });
+	      selection.append('a').attr('class', 'chip').attr('href', '#').call(_t.append('feature_info.hidden_warning', {
+	        count: count
+	      })).call(tooltipBehavior).on('click', function (d3_event) {
+	        tooltipBehavior.hide();
+	        d3_event.preventDefault(); // open the Map Data pane
+
+	        context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
+	      });
 	    }
 
+	    selection.classed('hide', !hiddenList.length);
+	  }
 
-	    var panel = function(selection) {
-	        selection.call(redraw);
+	  return function (selection) {
+	    update(selection);
+	    context.features().on('change.feature_info', function () {
+	      update(selection);
+	    });
+	  };
+	}
 
-	        context.surface()
-	            .on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function() {
-	                selection.call(redraw);
-	            });
-	    };
+	function uiFlash(context) {
+	  var _flashTimer;
+
+	  var _duration = 2000;
+	  var _iconName = '#iD-icon-no';
+	  var _iconClass = 'disabled';
+	  var _label = '';
+
+	  function flash() {
+	    if (_flashTimer) {
+	      _flashTimer.stop();
+	    }
+
+	    context.container().select('.main-footer-wrap').classed('footer-hide', true).classed('footer-show', false);
+	    context.container().select('.flash-wrap').classed('footer-hide', false).classed('footer-show', true);
+	    var content = context.container().select('.flash-wrap').selectAll('.flash-content').data([0]); // Enter
+
+	    var contentEnter = content.enter().append('div').attr('class', 'flash-content');
+	    var iconEnter = contentEnter.append('svg').attr('class', 'flash-icon icon').append('g').attr('transform', 'translate(10,10)');
+	    iconEnter.append('circle').attr('r', 9);
+	    iconEnter.append('use').attr('transform', 'translate(-7,-7)').attr('width', '14').attr('height', '14');
+	    contentEnter.append('div').attr('class', 'flash-text'); // Update
+
+	    content = content.merge(contentEnter);
+	    content.selectAll('.flash-icon').attr('class', 'icon flash-icon ' + (_iconClass || ''));
+	    content.selectAll('.flash-icon use').attr('xlink:href', _iconName);
+	    content.selectAll('.flash-text').attr('class', 'flash-text').html(_label);
+	    _flashTimer = d3_timeout(function () {
+	      _flashTimer = null;
+	      context.container().select('.main-footer-wrap').classed('footer-hide', false).classed('footer-show', true);
+	      context.container().select('.flash-wrap').classed('footer-hide', true).classed('footer-show', false);
+	    }, _duration);
+	    return content;
+	  }
+
+	  flash.duration = function (_) {
+	    if (!arguments.length) return _duration;
+	    _duration = _;
+	    return flash;
+	  };
 
-	    panel.off = function() {
-	        context.surface()
-	            .on('.info-location', null);
-	    };
+	  flash.label = function (_) {
+	    if (!arguments.length) return _label;
+	    _label = _;
+	    return flash;
+	  };
 
-	    panel.id = 'location';
-	    panel.title = _t('info_panels.location.title');
-	    panel.key = _t('info_panels.location.key');
+	  flash.iconName = function (_) {
+	    if (!arguments.length) return _iconName;
+	    _iconName = _;
+	    return flash;
+	  };
 
+	  flash.iconClass = function (_) {
+	    if (!arguments.length) return _iconClass;
+	    _iconClass = _;
+	    return flash;
+	  };
 
-	    return panel;
+	  return flash;
 	}
 
-	function uiPanelMeasurement(context) {
-	    var locale = _mainLocalizer.localeCode();
-	    var isImperial = !_mainLocalizer.usesMetric();
+	function uiFullScreen(context) {
+	  var element = context.container().node(); // var button = d3_select(null);
 
+	  function getFullScreenFn() {
+	    if (element.requestFullscreen) {
+	      return element.requestFullscreen;
+	    } else if (element.msRequestFullscreen) {
+	      return element.msRequestFullscreen;
+	    } else if (element.mozRequestFullScreen) {
+	      return element.mozRequestFullScreen;
+	    } else if (element.webkitRequestFullscreen) {
+	      return element.webkitRequestFullscreen;
+	    }
+	  }
 
-	    function radiansToMeters(r) {
-	        // using WGS84 authalic radius (6371007.1809 m)
-	        return r * 6371007.1809;
+	  function getExitFullScreenFn() {
+	    if (document.exitFullscreen) {
+	      return document.exitFullscreen;
+	    } else if (document.msExitFullscreen) {
+	      return document.msExitFullscreen;
+	    } else if (document.mozCancelFullScreen) {
+	      return document.mozCancelFullScreen;
+	    } else if (document.webkitExitFullscreen) {
+	      return document.webkitExitFullscreen;
 	    }
+	  }
+
+	  function isFullScreen() {
+	    return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
+	  }
 
-	    function steradiansToSqmeters(r) {
-	        // http://gis.stackexchange.com/a/124857/40446
-	        return r / (4 * Math.PI) * 510065621724000;
+	  function isSupported() {
+	    return !!getFullScreenFn();
+	  }
+
+	  function fullScreen(d3_event) {
+	    d3_event.preventDefault();
+
+	    if (!isFullScreen()) {
+	      // button.classed('active', true);
+	      getFullScreenFn().apply(element);
+	    } else {
+	      // button.classed('active', false);
+	      getExitFullScreenFn().apply(document);
 	    }
+	  }
 
+	  return function () {
+	    // selection) {
+	    if (!isSupported()) return; // button = selection.append('button')
+	    //     .attr('title', t('full_screen'))
+	    //     .on('click', fullScreen)
+	    //     .call(tooltip);
+	    // button.append('span')
+	    //     .attr('class', 'icon full-screen');
 
-	    function toLineString(feature) {
-	        if (feature.type === 'LineString') { return feature; }
-
-	        var result = { type: 'LineString', coordinates: [] };
-	        if (feature.type === 'Polygon') {
-	            result.coordinates = feature.coordinates[0];
-	        } else if (feature.type === 'MultiPolygon') {
-	            result.coordinates = feature.coordinates[0][0];
-	        }
+	    var detected = utilDetect();
+	    var keys = detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11'];
+	    context.keybinding().on(keys, fullScreen);
+	  };
+	}
 
-	        return result;
-	    }
+	function uiGeolocate(context) {
+	  var _geolocationOptions = {
+	    // prioritize speed and power usage over precision
+	    enableHighAccuracy: false,
+	    // don't hang indefinitely getting the location
+	    timeout: 6000 // 6sec
 
+	  };
 
-	    function redraw(selection) {
-	        var graph = context.graph();
-	        var selectedNoteID = context.selectedNoteID();
-	        var osm = services.osm;
+	  var _locating = uiLoading(context).message(_t.html('geolocate.locating')).blocking(true);
 
-	        var heading;
-	        var center, location, centroid;
-	        var closed, geometry;
-	        var totalNodeCount, length = 0, area = 0;
+	  var _layer = context.layers().layer('geolocate');
 
-	        if (selectedNoteID && osm) {       // selected 1 note
+	  var _position;
 
-	            var note = osm.getNote(selectedNoteID);
-	            heading = _t('note.note') + ' ' + selectedNoteID;
-	            location = note.loc;
-	            geometry = 'note';
+	  var _extent;
 
-	        } else {                           // selected 1..n entities
-	            var selectedIDs = context.selectedIDs().filter(function(id) {
-	                return context.hasEntity(id);
-	            });
-	            var selected = selectedIDs.map(function(id) {
-	                return context.entity(id);
-	            });
+	  var _timeoutID;
 
-	            heading = selected.length === 1 ? selected[0].id :
-	                _t('info_panels.measurement.selected', { n: selected.length.toLocaleString(locale) });
-
-	            if (selected.length) {
-	                var extent = geoExtent();
-	                for (var i in selected) {
-	                    var entity = selected[i];
-	                    extent._extend(entity.extent(graph));
-
-	                    geometry = entity.geometry(graph);
-	                    if (geometry === 'line' || geometry === 'area') {
-	                        closed = (entity.type === 'relation') || (entity.isClosed() && !entity.isDegenerate());
-	                        var feature = entity.asGeoJSON(graph);
-	                        length += radiansToMeters(d3_geoLength(toLineString(feature)));
-	                        centroid = d3_geoCentroid(feature);
-	                        if (closed) {
-	                            area += steradiansToSqmeters(entity.area(graph));
-	                        }
-	                    }
-	                }
+	  var _button = select(null);
 
-	                if (selected.length > 1) {
-	                    geometry = null;
-	                    closed = null;
-	                    centroid = null;
-	                }
+	  function click() {
+	    if (context.inIntro()) return;
 
-	                if (selected.length === 1 && selected[0].type === 'node') {
-	                    location = selected[0].loc;
-	                } else {
-	                    totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
-	                }
+	    if (!_layer.enabled() && !_locating.isShown()) {
+	      // This timeout ensures that we still call finish() even if
+	      // the user declines to share their location in Firefox
+	      _timeoutID = setTimeout(error, 10000
+	      /* 10sec */
+	      );
+	      context.container().call(_locating); // get the latest position even if we already have one
 
-	                if (!location && !centroid) {
-	                    center = extent.center();
-	                }
-	            }
-	        }
+	      navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
+	    } else {
+	      _locating.close();
 
-	        selection.html('');
+	      _layer.enabled(null, false);
 
-	        if (heading) {
-	            selection
-	                .append('h4')
-	                .attr('class', 'measurement-heading')
-	                .text(heading);
-	        }
+	      updateButtonState();
+	    }
+	  }
 
-	        var list = selection
-	            .append('ul');
-	        var coordItem;
+	  function zoomTo() {
+	    context.enter(modeBrowse(context));
+	    var map = context.map();
 
-	        if (geometry) {
-	            list
-	                .append('li')
-	                .text(_t('info_panels.measurement.geometry') + ':')
-	                .append('span')
-	                .text(
-	                    closed ? _t('info_panels.measurement.closed_' + geometry) : _t('geometry.' + geometry)
-	                );
-	        }
+	    _layer.enabled(_position, true);
 
-	        if (totalNodeCount) {
-	            list
-	                .append('li')
-	                .text(_t('info_panels.measurement.node_count') + ':')
-	                .append('span')
-	                .text(totalNodeCount.toLocaleString(locale));
-	        }
+	    updateButtonState();
+	    map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
+	  }
 
-	        if (area) {
-	            list
-	                .append('li')
-	                .text(_t('info_panels.measurement.area') + ':')
-	                .append('span')
-	                .text(displayArea(area, isImperial));
-	        }
+	  function success(geolocation) {
+	    _position = geolocation;
+	    var coords = _position.coords;
+	    _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
+	    zoomTo();
+	    finish();
+	  }
 
-	        if (length) {
-	            var lengthLabel = _t('info_panels.measurement.' + (closed ? 'perimeter' : 'length'));
-	            list
-	                .append('li')
-	                .text(lengthLabel + ':')
-	                .append('span')
-	                .text(displayLength(length, isImperial));
-	        }
-
-	        if (location) {
-	            coordItem = list
-	                .append('li')
-	                .text(_t('info_panels.measurement.location') + ':');
-	            coordItem.append('span')
-	                .text(dmsCoordinatePair(location));
-	            coordItem.append('span')
-	                .text(decimalCoordinatePair(location));
-	        }
-
-	        if (centroid) {
-	            coordItem = list
-	                .append('li')
-	                .text(_t('info_panels.measurement.centroid') + ':');
-	            coordItem.append('span')
-	                .text(dmsCoordinatePair(centroid));
-	            coordItem.append('span')
-	                .text(decimalCoordinatePair(centroid));
-	        }
-
-	        if (center) {
-	            coordItem = list
-	                .append('li')
-	                .text(_t('info_panels.measurement.center') + ':');
-	            coordItem.append('span')
-	                .text(dmsCoordinatePair(center));
-	            coordItem.append('span')
-	                .text(decimalCoordinatePair(center));
-	        }
-
-	        if (length || area) {
-	            var toggle  = isImperial ? 'imperial' : 'metric';
-	            selection
-	                .append('a')
-	                .text(_t('info_panels.measurement.' + toggle))
-	                .attr('href', '#')
-	                .attr('class', 'button button-toggle-units')
-	                .on('click', function() {
-	                    event.preventDefault();
-	                    isImperial = !isImperial;
-	                    selection.call(redraw);
-	                });
-	        }
+	  function error() {
+	    if (_position) {
+	      // use the position from a previous call if we have one
+	      zoomTo();
+	    } else {
+	      context.ui().flash.label(_t.html('geolocate.location_unavailable')).iconName('#iD-icon-geolocate')();
 	    }
 
+	    finish();
+	  }
 
-	    var panel = function(selection) {
-	        selection.call(redraw);
+	  function finish() {
+	    _locating.close(); // unblock ui
 
-	        context.map()
-	            .on('drawn.info-measurement', function() {
-	                selection.call(redraw);
-	            });
 
-	        context
-	            .on('enter.info-measurement', function() {
-	                selection.call(redraw);
-	            });
-	    };
+	    if (_timeoutID) {
+	      clearTimeout(_timeoutID);
+	    }
 
-	    panel.off = function() {
-	        context.map().on('drawn.info-measurement', null);
-	        context.on('enter.info-measurement', null);
-	    };
+	    _timeoutID = undefined;
+	  }
 
-	    panel.id = 'measurement';
-	    panel.title = _t('info_panels.measurement.title');
-	    panel.key = _t('info_panels.measurement.key');
+	  function updateButtonState() {
+	    _button.classed('active', _layer.enabled());
 
+	    _button.attr('aria-pressed', _layer.enabled());
+	  }
 
-	    return panel;
+	  return function (selection) {
+	    if (!navigator.geolocation || !navigator.geolocation.getCurrentPosition) return;
+	    _button = selection.append('button').on('click', click).attr('aria-pressed', false).call(svgIcon('#iD-icon-geolocate', 'light')).call(uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_t.html('geolocate.title')).keys([_t('geolocate.key')]));
+	    context.keybinding().on(_t('geolocate.key'), click);
+	  };
 	}
 
-	var uiInfoPanels = {
-	    background: uiPanelBackground,
-	    history: uiPanelHistory,
-	    location: uiPanelLocation,
-	    measurement: uiPanelMeasurement,
-	};
+	function uiPanelBackground(context) {
+	  var background = context.background();
+	  var _currSourceName = null;
+	  var _metadata = {};
+	  var _metadataKeys = ['zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'];
+
+	  var debouncedRedraw = debounce(redraw, 250);
+
+	  function redraw(selection) {
+	    var source = background.baseLayerSource();
+	    if (!source) return;
+	    var isDG = source.id.match(/^DigitalGlobe/i) !== null;
+	    var sourceLabel = source.label();
+
+	    if (_currSourceName !== sourceLabel) {
+	      _currSourceName = sourceLabel;
+	      _metadata = {};
+	    }
+
+	    selection.html('');
+	    var list = selection.append('ul').attr('class', 'background-info');
+	    list.append('li').html(_currSourceName);
+
+	    _metadataKeys.forEach(function (k) {
+	      // DigitalGlobe vintage is available in raster layers for now.
+	      if (isDG && k === 'vintage') return;
+	      list.append('li').attr('class', 'background-info-list-' + k).classed('hide', !_metadata[k]).call(_t.append('info_panels.background.' + k, {
+	        suffix: ':'
+	      })).append('span').attr('class', 'background-info-span-' + k).text(_metadata[k]);
+	    });
 
-	function uiInfo(context) {
-	    var ids = Object.keys(uiInfoPanels);
-	    var wasActive = ['measurement'];
-	    var panels = {};
-	    var active = {};
-
-	    // create panels
-	    ids.forEach(function(k) {
-	        if (!panels[k]) {
-	            panels[k] = uiInfoPanels[k](context);
-	            active[k] = false;
-	        }
+	    debouncedGetMetadata(selection);
+	    var toggleTiles = context.getDebug('tile') ? 'hide_tiles' : 'show_tiles';
+	    selection.append('a').call(_t.append('info_panels.background.' + toggleTiles)).attr('href', '#').attr('class', 'button button-toggle-tiles').on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.setDebug('tile', !context.getDebug('tile'));
+	      selection.call(redraw);
 	    });
 
+	    if (isDG) {
+	      var key = source.id + '-vintage';
+	      var sourceVintage = context.background().findSource(key);
+	      var showsVintage = context.background().showsLayer(sourceVintage);
+	      var toggleVintage = showsVintage ? 'hide_vintage' : 'show_vintage';
+	      selection.append('a').call(_t.append('info_panels.background.' + toggleVintage)).attr('href', '#').attr('class', 'button button-toggle-vintage').on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        context.background().toggleOverlayLayer(sourceVintage);
+	        selection.call(redraw);
+	      });
+	    } // disable if necessary
 
-	    function info(selection) {
 
-	        function redraw() {
-	            var activeids = ids.filter(function(k) { return active[k]; }).sort();
+	    ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function (layerId) {
+	      if (source.id !== layerId) {
+	        var key = layerId + '-vintage';
+	        var sourceVintage = context.background().findSource(key);
 
-	            var containers = infoPanels.selectAll('.panel-container')
-	                .data(activeids, function(k) { return k; });
+	        if (context.background().showsLayer(sourceVintage)) {
+	          context.background().toggleOverlayLayer(sourceVintage);
+	        }
+	      }
+	    });
+	  }
 
-	            containers.exit()
-	                .style('opacity', 1)
-	                .transition()
-	                .duration(200)
-	                .style('opacity', 0)
-	                .on('end', function(d) {
-	                    select(this)
-	                        .call(panels[d].off)
-	                        .remove();
-	                });
+	  var debouncedGetMetadata = debounce(getMetadata, 250);
 
-	            var enter = containers.enter()
-	                .append('div')
-	                .attr('class', function(d) { return 'fillD2 panel-container panel-container-' + d; });
+	  function getMetadata(selection) {
+	    var tile = context.container().select('.layer-background img.tile-center'); // tile near viewport center
 
-	            enter
-	                .style('opacity', 0)
-	                .transition()
-	                .duration(200)
-	                .style('opacity', 1);
+	    if (tile.empty()) return;
+	    var sourceName = _currSourceName;
+	    var d = tile.datum();
+	    var zoom = d && d.length >= 3 && d[2] || Math.floor(context.map().zoom());
+	    var center = context.map().center(); // update zoom
 
-	            var title = enter
-	                .append('div')
-	                .attr('class', 'panel-title fillD2');
+	    _metadata.zoom = String(zoom);
+	    selection.selectAll('.background-info-list-zoom').classed('hide', false).selectAll('.background-info-span-zoom').text(_metadata.zoom);
+	    if (!d || !d.length >= 3) return;
+	    background.baseLayerSource().getMetadata(center, d, function (err, result) {
+	      if (err || _currSourceName !== sourceName) return; // update vintage
 
-	            title
-	                .append('h3')
-	                .text(function(d) { return panels[d].title; });
+	      var vintage = result.vintage;
+	      _metadata.vintage = vintage && vintage.range || _t('info_panels.background.unknown');
+	      selection.selectAll('.background-info-list-vintage').classed('hide', false).selectAll('.background-info-span-vintage').text(_metadata.vintage); // update other _metadata
 
-	            title
-	                .append('button')
-	                .attr('class', 'close')
-	                .on('click', function (d) { info.toggle(d); })
-	                .call(svgIcon('#iD-icon-close'));
+	      _metadataKeys.forEach(function (k) {
+	        if (k === 'zoom' || k === 'vintage') return; // done already
 
-	            enter
-	                .append('div')
-	                .attr('class', function(d) { return 'panel-content panel-content-' + d; });
+	        var val = result[k];
+	        _metadata[k] = val;
+	        selection.selectAll('.background-info-list-' + k).classed('hide', !val).selectAll('.background-info-span-' + k).text(val);
+	      });
+	    });
+	  }
 
+	  var panel = function panel(selection) {
+	    selection.call(redraw);
+	    context.map().on('drawn.info-background', function () {
+	      selection.call(debouncedRedraw);
+	    }).on('move.info-background', function () {
+	      selection.call(debouncedGetMetadata);
+	    });
+	  };
 
-	            // redraw the panels
-	            infoPanels.selectAll('.panel-content')
-	                .each(function(d) {
-	                    select(this).call(panels[d]);
-	                });
-	        }
+	  panel.off = function () {
+	    context.map().on('drawn.info-background', null).on('move.info-background', null);
+	  };
 
+	  panel.id = 'background';
+	  panel.label = _t.html('info_panels.background.title');
+	  panel.key = _t('info_panels.background.key');
+	  return panel;
+	}
 
-	        info.toggle = function(which) {
-	            if (event) {
-	                event.stopImmediatePropagation();
-	                event.preventDefault();
-	            }
+	function uiPanelHistory(context) {
+	  var osm;
 
-	            var activeids = ids.filter(function(k) { return active[k]; });
+	  function displayTimestamp(timestamp) {
+	    if (!timestamp) return _t('info_panels.history.unknown');
+	    var options = {
+	      day: 'numeric',
+	      month: 'short',
+	      year: 'numeric',
+	      hour: 'numeric',
+	      minute: 'numeric',
+	      second: 'numeric'
+	    };
+	    var d = new Date(timestamp);
+	    if (isNaN(d.getTime())) return _t('info_panels.history.unknown');
+	    return d.toLocaleString(_mainLocalizer.localeCode(), options);
+	  }
 
-	            if (which) {  // toggle one
-	                active[which] = !active[which];
-	                if (activeids.length === 1 && activeids[0] === which) {  // none active anymore
-	                    wasActive = [which];
-	                }
+	  function displayUser(selection, userName) {
+	    if (!userName) {
+	      selection.append('span').call(_t.append('info_panels.history.unknown'));
+	      return;
+	    }
 
-	                context.container().select('.' + which + '-panel-toggle-item')
-	                    .classed('active', active[which])
-	                    .select('input')
-	                    .property('checked', active[which]);
+	    selection.append('span').attr('class', 'user-name').text(userName);
+	    var links = selection.append('div').attr('class', 'links');
 
-	            } else {      // toggle all
-	                if (activeids.length) {
-	                    wasActive = activeids;
-	                    activeids.forEach(function(k) { active[k] = false; });
-	                } else {
-	                    wasActive.forEach(function(k) { active[k] = true; });
-	                }
-	            }
+	    if (osm) {
+	      links.append('a').attr('class', 'user-osm-link').attr('href', osm.userURL(userName)).attr('target', '_blank').call(_t.append('info_panels.history.profile_link'));
+	    }
 
-	            redraw();
-	        };
+	    links.append('a').attr('class', 'user-hdyc-link').attr('href', 'https://hdyc.neis-one.org/?' + userName).attr('target', '_blank').attr('tabindex', -1).text('HDYC');
+	  }
 
+	  function displayChangeset(selection, changeset) {
+	    if (!changeset) {
+	      selection.append('span').call(_t.append('info_panels.history.unknown'));
+	      return;
+	    }
 
-	        var infoPanels = selection.selectAll('.info-panels')
-	            .data([0]);
+	    selection.append('span').attr('class', 'changeset-id').text(changeset);
+	    var links = selection.append('div').attr('class', 'links');
 
-	        infoPanels = infoPanels.enter()
-	            .append('div')
-	            .attr('class', 'info-panels')
-	            .merge(infoPanels);
+	    if (osm) {
+	      links.append('a').attr('class', 'changeset-osm-link').attr('href', osm.changesetURL(changeset)).attr('target', '_blank').call(_t.append('info_panels.history.changeset_link'));
+	    }
 
-	        redraw();
+	    links.append('a').attr('class', 'changeset-osmcha-link').attr('href', 'https://osmcha.org/changesets/' + changeset).attr('target', '_blank').text('OSMCha');
+	    links.append('a').attr('class', 'changeset-achavi-link').attr('href', 'https://overpass-api.de/achavi/?changeset=' + changeset).attr('target', '_blank').text('Achavi');
+	  }
 
-	        context.keybinding()
-	            .on(uiCmd('⌘' + _t('info_panels.key')), info.toggle);
+	  function redraw(selection) {
+	    var selectedNoteID = context.selectedNoteID();
+	    osm = context.connection();
+	    var selected, note, entity;
 
-	        ids.forEach(function(k) {
-	            var key = _t('info_panels.' + k + '.key', { default: null });
-	            if (!key) { return; }
-	            context.keybinding()
-	                .on(uiCmd('⌘⇧' + key), function() { info.toggle(k); });
-	        });
+	    if (selectedNoteID && osm) {
+	      // selected 1 note
+	      selected = [_t.html('note.note') + ' ' + selectedNoteID];
+	      note = osm.getNote(selectedNoteID);
+	    } else {
+	      // selected 1..n entities
+	      selected = context.selectedIDs().filter(function (e) {
+	        return context.hasEntity(e);
+	      });
+
+	      if (selected.length) {
+	        entity = context.entity(selected[0]);
+	      }
 	    }
 
-	    return info;
-	}
+	    var singular = selected.length === 1 ? selected[0] : null;
+	    selection.html('');
 
-	function pointBox(loc, context) {
-	    var rect = context.surfaceRect();
-	    var point = context.curtainProjection(loc);
-	    return {
-	        left: point[0] + rect.left - 40,
-	        top: point[1] + rect.top - 60,
-	        width: 80,
-	        height: 90
-	    };
-	}
+	    if (singular) {
+	      selection.append('h4').attr('class', 'history-heading').html(singular);
+	    } else {
+	      selection.append('h4').attr('class', 'history-heading').call(_t.append('info_panels.selected', {
+	        n: selected.length
+	      }));
+	    }
 
+	    if (!singular) return;
 
-	function pad(locOrBox, padding, context) {
-	    var box;
-	    if (locOrBox instanceof Array) {
-	        var rect = context.surfaceRect();
-	        var point = context.curtainProjection(locOrBox);
-	        box = {
-	            left: point[0] + rect.left,
-	            top: point[1] + rect.top
-	        };
-	    } else {
-	        box = locOrBox;
+	    if (entity) {
+	      selection.call(redrawEntity, entity);
+	    } else if (note) {
+	      selection.call(redrawNote, note);
 	    }
+	  }
 
-	    return {
-	        left: box.left - padding,
-	        top: box.top - padding,
-	        width: (box.width || 0) + 2 * padding,
-	        height: (box.width || 0) + 2 * padding
-	    };
-	}
+	  function redrawNote(selection, note) {
+	    if (!note || note.isNew()) {
+	      selection.append('div').call(_t.append('info_panels.history.note_no_history'));
+	      return;
+	    }
 
+	    var list = selection.append('ul');
+	    list.append('li').call(_t.append('info_panels.history.note_comments', {
+	      suffix: ':'
+	    })).append('span').text(note.comments.length);
 
-	function icon(name, svgklass, useklass) {
-	    return '<svg class="icon ' + (svgklass || '') + '">' +
-	         '<use xlink:href="' + name + '"' +
-	         (useklass ? ' class="' + useklass + '"' : '') + '></use></svg>';
-	}
+	    if (note.comments.length) {
+	      list.append('li').call(_t.append('info_panels.history.note_created_date', {
+	        suffix: ':'
+	      })).append('span').text(displayTimestamp(note.comments[0].date));
+	      list.append('li').call(_t.append('info_panels.history.note_created_user', {
+	        suffix: ':'
+	      })).call(displayUser, note.comments[0].user);
+	    }
 
-	var helpStringReplacements;
+	    if (osm) {
+	      selection.append('a').attr('class', 'view-history-on-osm').attr('target', '_blank').attr('href', osm.noteURL(note)).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').call(_t.append('info_panels.history.note_link_text'));
+	    }
+	  }
 
-	// Returns the localized string for `id` with a standardized set of icon, key, and
-	// label replacements suitable for tutorials and documentation. Optionally supplemented
-	// with custom `replacements`
-	function helpString(id, replacements) {
-	    // only load these the first time
-	    if (!helpStringReplacements) { helpStringReplacements = {
-	        // insert icons corresponding to various UI elements
-	        point_icon: icon('#iD-icon-point', 'pre-text'),
-	        line_icon: icon('#iD-icon-line', 'pre-text'),
-	        area_icon: icon('#iD-icon-area', 'pre-text'),
-	        note_icon: icon('#iD-icon-note', 'pre-text add-note'),
-	        plus: icon('#iD-icon-plus', 'pre-text'),
-	        minus: icon('#iD-icon-minus', 'pre-text'),
-	        move_icon: icon('#iD-operation-move', 'pre-text operation'),
-	        merge_icon: icon('#iD-operation-merge', 'pre-text operation'),
-	        delete_icon: icon('#iD-operation-delete', 'pre-text operation'),
-	        circularize_icon: icon('#iD-operation-circularize', 'pre-text operation'),
-	        split_icon: icon('#iD-operation-split', 'pre-text operation'),
-	        orthogonalize_icon: icon('#iD-operation-orthogonalize', 'pre-text operation'),
-	        disconnect_icon: icon('#iD-operation-disconnect', 'pre-text operation'),
-	        layers_icon: icon('#iD-icon-layers', 'pre-text'),
-	        data_icon: icon('#iD-icon-data', 'pre-text'),
-	        inspect: icon('#iD-icon-inspect', 'pre-text'),
-	        help_icon: icon('#iD-icon-help', 'pre-text'),
-	        undo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo', 'pre-text'),
-	        redo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-undo' : '#iD-icon-redo', 'pre-text'),
-	        save_icon: icon('#iD-icon-save', 'pre-text'),
-	        leftclick: icon('#iD-walkthrough-mouse-left', 'pre-text operation'),
-	        rightclick: icon('#iD-walkthrough-mouse-right', 'pre-text operation'),
-	        mousewheel_icon: icon('#iD-walkthrough-mousewheel', 'pre-text operation'),
-	        tap_icon: icon('#iD-walkthrough-tap', 'pre-text operation'),
-	        doubletap_icon: icon('#iD-walkthrough-doubletap', 'pre-text operation'),
-	        longpress_icon: icon('#iD-walkthrough-longpress', 'pre-text operation'),
-	        touchdrag_icon: icon('#iD-walkthrough-touchdrag', 'pre-text operation'),
-	        pinch_icon: icon('#iD-walkthrough-pinch-apart', 'pre-text operation'),
-
-	        // insert keys; may be localized and platform-dependent
-	        shift: uiCmd.display('⇧'),
-	        alt: uiCmd.display('⌥'),
-	        return: uiCmd.display('↵'),
-	        esc: _t('shortcuts.key.esc'),
-	        space: _t('shortcuts.key.space'),
-	        add_note_key: _t('modes.add_note.key'),
-	        help_key: _t('help.key'),
-	        shortcuts_key: _t('shortcuts.toggle.key'),
-
-	        // reference localized UI labels directly so that they'll always match
-	        save: _t('save.title'),
-	        undo: _t('undo.title'),
-	        redo: _t('redo.title'),
-	        upload: _t('commit.save'),
-	        point: _t('modes.add_point.title'),
-	        line: _t('modes.add_line.title'),
-	        area: _t('modes.add_area.title'),
-	        note: _t('modes.add_note.title'),
-	        delete: _t('operations.delete.title'),
-	        move: _t('operations.move.title'),
-	        orthogonalize: _t('operations.orthogonalize.title'),
-	        circularize: _t('operations.circularize.title'),
-	        merge: _t('operations.merge.title'),
-	        disconnect: _t('operations.disconnect.title'),
-	        split: _t('operations.split.title'),
-	        map_data: _t('map_data.title'),
-	        osm_notes: _t('map_data.layers.notes.title'),
-	        fields: _t('inspector.fields'),
-	        tags: _t('inspector.tags'),
-	        relations: _t('inspector.relations'),
-	        new_relation: _t('inspector.new_relation'),
-	        turn_restrictions: _t('presets.fields.restrictions.label'),
-	        background_settings: _t('background.description'),
-	        imagery_offset: _t('background.fix_misalignment'),
-	        start_the_walkthrough: _t('splash.walkthrough'),
-	        help: _t('help.title'),
-	        ok: _t('intro.ok')
-	    }; }
-
-	    var reps;
-	    if (replacements) {
-	        reps = Object.assign(replacements, helpStringReplacements);
-	    } else {
-	        reps = helpStringReplacements;
+	  function redrawEntity(selection, entity) {
+	    if (!entity || entity.isNew()) {
+	      selection.append('div').call(_t.append('info_panels.history.no_history'));
+	      return;
 	    }
 
-	    return _t(id, reps)
-	         // use keyboard key styling for shortcuts
-	        .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
-	}
+	    var links = selection.append('div').attr('class', 'links');
+
+	    if (osm) {
+	      links.append('a').attr('class', 'view-history-on-osm').attr('href', osm.historyURL(entity)).attr('target', '_blank').call(_t.append('info_panels.history.history_link'));
+	    }
 
+	    links.append('a').attr('class', 'pewu-history-viewer-link').attr('href', 'https://pewu.github.io/osm-history/#/' + entity.type + '/' + entity.osmId()).attr('target', '_blank').attr('tabindex', -1).text('PeWu');
+	    var list = selection.append('ul');
+	    list.append('li').call(_t.append('info_panels.history.version', {
+	      suffix: ':'
+	    })).append('span').text(entity.version);
+	    list.append('li').call(_t.append('info_panels.history.last_edit', {
+	      suffix: ':'
+	    })).append('span').text(displayTimestamp(entity.timestamp));
+	    list.append('li').call(_t.append('info_panels.history.edited_by', {
+	      suffix: ':'
+	    })).call(displayUser, entity.user);
+	    list.append('li').call(_t.append('info_panels.history.changeset', {
+	      suffix: ':'
+	    })).call(displayChangeset, entity.changeset);
+	  }
 
-	function slugify(text) {
-	    return text.toString().toLowerCase()
-	        .replace(/\s+/g, '-')           // Replace spaces with -
-	        .replace(/[^\w\-]+/g, '')       // Remove all non-word chars
-	        .replace(/\-\-+/g, '-')         // Replace multiple - with single -
-	        .replace(/^-+/, '')             // Trim - from start of text
-	        .replace(/-+$/, '');            // Trim - from end of text
-	}
+	  var panel = function panel(selection) {
+	    selection.call(redraw);
+	    context.map().on('drawn.info-history', function () {
+	      selection.call(redraw);
+	    });
+	    context.on('enter.info-history', function () {
+	      selection.call(redraw);
+	    });
+	  };
 
+	  panel.off = function () {
+	    context.map().on('drawn.info-history', null);
+	    context.on('enter.info-history', null);
+	  };
 
-	// console warning for missing walkthrough names
-	var missingStrings = {};
-	function checkKey(key, text) {
-	    if (_t(key, { default: undefined}) === undefined) {
-	        if (missingStrings.hasOwnProperty(key)) { return; }  // warn once
-	        missingStrings[key] = text;
-	        var missing = key + ': ' + text;
-	        if (typeof console !== 'undefined') { console.log(missing); } // eslint-disable-line
-	    }
+	  panel.id = 'history';
+	  panel.label = _t.html('info_panels.history.title');
+	  panel.key = _t('info_panels.history.key');
+	  return panel;
 	}
 
+	var OSM_PRECISION = 7;
+	/**
+	 * Returns a localized representation of the given length measurement.
+	 *
+	 * @param {Number} m area in meters
+	 * @param {Boolean} isImperial true for U.S. customary units; false for metric
+	 */
 
-	function localize(obj) {
-	    var key;
+	function displayLength(m, isImperial) {
+	  var d = m * (isImperial ? 3.28084 : 1);
+	  var unit;
 
-	    // Assign name if entity has one..
-	    var name = obj.tags && obj.tags.name;
-	    if (name) {
-	        key = 'intro.graph.name.' + slugify(name);
-	        obj.tags.name = _t(key, { default: name });
-	        checkKey(key, name);
-	    }
-
-	    // Assign street name if entity has one..
-	    var street = obj.tags && obj.tags['addr:street'];
-	    if (street) {
-	        key = 'intro.graph.name.' + slugify(street);
-	        obj.tags['addr:street'] = _t(key, { default: street });
-	        checkKey(key, street);
-
-	        // Add address details common across walkthrough..
-	        var addrTags = [
-	            'block_number', 'city', 'county', 'district', 'hamlet', 'neighbourhood',
-	            'postcode', 'province', 'quarter', 'state', 'subdistrict', 'suburb'
-	        ];
-	        addrTags.forEach(function(k) {
-	            var key = 'intro.graph.' + k;
-	            var tag = 'addr:' + k;
-	            var val = obj.tags && obj.tags[tag];
-	            var str = _t(key, { default: val });
-
-	            if (str) {
-	                if (str.match(/^<.*>$/) !== null) {
-	                    delete obj.tags[tag];
-	                } else {
-	                    obj.tags[tag] = str;
-	                }
-	            }
-	        });
+	  if (isImperial) {
+	    if (d >= 5280) {
+	      d /= 5280;
+	      unit = 'miles';
+	    } else {
+	      unit = 'feet';
+	    }
+	  } else {
+	    if (d >= 1000) {
+	      d /= 1000;
+	      unit = 'kilometers';
+	    } else {
+	      unit = 'meters';
 	    }
+	  }
 
-	    return obj;
+	  return _t('units.' + unit, {
+	    quantity: d.toLocaleString(_mainLocalizer.localeCode(), {
+	      maximumSignificantDigits: 4
+	    })
+	  });
 	}
+	/**
+	 * Returns a localized representation of the given area measurement.
+	 *
+	 * @param {Number} m2 area in square meters
+	 * @param {Boolean} isImperial true for U.S. customary units; false for metric
+	 */
 
+	function displayArea(m2, isImperial) {
+	  var locale = _mainLocalizer.localeCode();
+	  var d = m2 * (isImperial ? 10.7639111056 : 1);
+	  var d1, d2, area;
+	  var unit1 = '';
+	  var unit2 = '';
+
+	  if (isImperial) {
+	    if (d >= 6969600) {
+	      // > 0.25mi² show mi²
+	      d1 = d / 27878400;
+	      unit1 = 'square_miles';
+	    } else {
+	      d1 = d;
+	      unit1 = 'square_feet';
+	    }
 
-	// Used to detect squareness.. some duplicataion of code from actionOrthogonalize.
-	function isMostlySquare(points) {
-	    // note: uses 15 here instead of the 12 from actionOrthogonalize because
-	    // actionOrthogonalize can actually straighten some larger angles as it iterates
-	    var threshold = 15; // degrees within right or straight
-	    var lowerBound = Math.cos((90 - threshold) * Math.PI / 180);  // near right
-	    var upperBound = Math.cos(threshold * Math.PI / 180);         // near straight
-
-	    for (var i = 0; i < points.length; i++) {
-	        var a = points[(i - 1 + points.length) % points.length];
-	        var origin = points[i];
-	        var b = points[(i + 1) % points.length];
-
-	        var dotp = geoVecNormalizedDot(a, b, origin);
-	        var mag = Math.abs(dotp);
-	        if (mag > lowerBound && mag < upperBound) {
-	            return false;
-	        }
+	    if (d > 4356 && d < 43560000) {
+	      // 0.1 - 1000 acres
+	      d2 = d / 43560;
+	      unit2 = 'acres';
+	    }
+	  } else {
+	    if (d >= 250000) {
+	      // > 0.25km² show km²
+	      d1 = d / 1000000;
+	      unit1 = 'square_kilometers';
+	    } else {
+	      d1 = d;
+	      unit1 = 'square_meters';
 	    }
 
-	    return true;
-	}
+	    if (d > 1000 && d < 10000000) {
+	      // 0.1 - 1000 hectares
+	      d2 = d / 10000;
+	      unit2 = 'hectares';
+	    }
+	  }
 
+	  area = _t('units.' + unit1, {
+	    quantity: d1.toLocaleString(locale, {
+	      maximumSignificantDigits: 4
+	    })
+	  });
 
-	function selectMenuItem(context, operation) {
-	    return context.container().select('.edit-menu .edit-menu-item-' + operation);
+	  if (d2) {
+	    return _t('units.area_pair', {
+	      area1: area,
+	      area2: _t('units.' + unit2, {
+	        quantity: d2.toLocaleString(locale, {
+	          maximumSignificantDigits: 2
+	        })
+	      })
+	    });
+	  } else {
+	    return area;
+	  }
 	}
 
-
-	function transitionTime(point1, point2) {
-	    var distance = geoSphericalDistance(point1, point2);
-	    if (distance === 0)
-	        { return 0; }
-	    else if (distance < 80)
-	        { return 500; }
-	    else
-	        { return 1000; }
+	function wrap(x, min, max) {
+	  var d = max - min;
+	  return ((x - min) % d + d) % d + min;
 	}
 
-	// Tooltips and svg mask used to highlight certain features
-	function uiCurtain(containerNode) {
+	function clamp(x, min, max) {
+	  return Math.max(min, Math.min(x, max));
+	}
 
-	    var surface = select(null),
-	        tooltip = select(null),
-	        darkness = select(null);
+	function displayCoordinate(deg, pos, neg) {
+	  var locale = _mainLocalizer.localeCode();
+	  var min = (Math.abs(deg) - Math.floor(Math.abs(deg))) * 60;
+	  var sec = (min - Math.floor(min)) * 60;
+	  var displayDegrees = _t('units.arcdegrees', {
+	    quantity: Math.floor(Math.abs(deg)).toLocaleString(locale)
+	  });
+	  var displayCoordinate;
 
-	    function curtain(selection) {
-	        surface = selection
-	            .append('svg')
-	            .attr('class', 'curtain')
-	            .style('top', 0)
-	            .style('left', 0);
+	  if (Math.floor(sec) > 0) {
+	    displayCoordinate = displayDegrees + _t('units.arcminutes', {
+	      quantity: Math.floor(min).toLocaleString(locale)
+	    }) + _t('units.arcseconds', {
+	      quantity: Math.round(sec).toLocaleString(locale)
+	    });
+	  } else if (Math.floor(min) > 0) {
+	    displayCoordinate = displayDegrees + _t('units.arcminutes', {
+	      quantity: Math.round(min).toLocaleString(locale)
+	    });
+	  } else {
+	    displayCoordinate = _t('units.arcdegrees', {
+	      quantity: Math.round(Math.abs(deg)).toLocaleString(locale)
+	    });
+	  }
 
-	        darkness = surface.append('path')
-	            .attr('x', 0)
-	            .attr('y', 0)
-	            .attr('class', 'curtain-darkness');
+	  if (deg === 0) {
+	    return displayCoordinate;
+	  } else {
+	    return _t('units.coordinate', {
+	      coordinate: displayCoordinate,
+	      direction: _t('units.' + (deg > 0 ? pos : neg))
+	    });
+	  }
+	}
+	/**
+	 * Returns given coordinate pair in degree-minute-second format.
+	 *
+	 * @param {Array<Number>} coord longitude and latitude
+	 */
 
-	        select(window).on('resize.curtain', resize);
 
-	        tooltip = selection.append('div')
-	            .attr('class', 'tooltip');
+	function dmsCoordinatePair(coord) {
+	  return _t('units.coordinate_pair', {
+	    latitude: displayCoordinate(clamp(coord[1], -90, 90), 'north', 'south'),
+	    longitude: displayCoordinate(wrap(coord[0], -180, 180), 'east', 'west')
+	  });
+	}
+	/**
+	 * Returns the given coordinate pair in decimal format.
+	 * note: unlocalized to avoid comma ambiguity - see #4765
+	 *
+	 * @param {Array<Number>} coord longitude and latitude
+	 */
 
-	        tooltip
-	            .append('div')
-	            .attr('class', 'popover-arrow');
+	function decimalCoordinatePair(coord) {
+	  return _t('units.coordinate_pair', {
+	    latitude: clamp(coord[1], -90, 90).toFixed(OSM_PRECISION),
+	    longitude: wrap(coord[0], -180, 180).toFixed(OSM_PRECISION)
+	  });
+	}
 
-	        tooltip
-	            .append('div')
-	            .attr('class', 'popover-inner');
+	function uiPanelLocation(context) {
+	  var currLocation = '';
 
-	        resize();
+	  function redraw(selection) {
+	    selection.html('');
+	    var list = selection.append('ul'); // Mouse coordinates
 
+	    var coord = context.map().mouseCoordinates();
 
-	        function resize() {
-	            surface
-	                .attr('width', containerNode.clientWidth)
-	                .attr('height', containerNode.clientHeight);
-	            curtain.cut(darkness.datum());
-	        }
+	    if (coord.some(isNaN)) {
+	      coord = context.map().center();
 	    }
 
+	    list.append('li').text(dmsCoordinatePair(coord)).append('li').text(decimalCoordinatePair(coord)); // Location Info
 
-	    /**
-	     * Reveal cuts the curtain to highlight the given box,
-	     * and shows a tooltip with instructions next to the box.
-	     *
-	     * @param  {String|ClientRect} [box]   box used to cut the curtain
-	     * @param  {String}    [text]          text for a tooltip
-	     * @param  {Object}    [options]
-	     * @param  {string}    [options.tooltipClass]    optional class to add to the tooltip
-	     * @param  {integer}   [options.duration]        transition time in milliseconds
-	     * @param  {string}    [options.buttonText]      if set, create a button with this text label
-	     * @param  {function}  [options.buttonCallback]  if set, the callback for the button
-	     * @param  {function}  [options.padding]         extra margin in px to put around bbox
-	     * @param  {String|ClientRect} [options.tooltipBox]  box for tooltip position, if different from box for the curtain
-	     */
-	    curtain.reveal = function(box, text, options) {
-	        options = options || {};
-
-	        if (typeof box === 'string') {
-	            box = select(box).node();
-	        }
-	        if (box && box.getBoundingClientRect) {
-	            box = copyBox(box.getBoundingClientRect());
-	            var containerRect = containerNode.getBoundingClientRect();
-	            box.top -= containerRect.top;
-	            box.left -= containerRect.left;
-	        }
-	        if (box && options.padding) {
-	            box.top -= options.padding;
-	            box.left -= options.padding;
-	            box.bottom += options.padding;
-	            box.right += options.padding;
-	            box.height += options.padding * 2;
-	            box.width += options.padding * 2;
-	        }
-
-	        var tooltipBox;
-	        if (options.tooltipBox) {
-	            tooltipBox = options.tooltipBox;
-	            if (typeof tooltipBox === 'string') {
-	                tooltipBox = select(tooltipBox).node();
-	            }
-	            if (tooltipBox && tooltipBox.getBoundingClientRect) {
-	                tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
-	            }
-	        } else {
-	            tooltipBox = box;
-	        }
-
-	        if (tooltipBox && text) {
-	            // pseudo markdown bold text for the instruction section..
-	            var parts = text.split('**');
-	            var html = parts[0] ? '<span>' + parts[0] + '</span>' : '';
-	            if (parts[1]) {
-	                html += '<span class="instruction">' + parts[1] + '</span>';
-	            }
+	    selection.append('div').attr('class', 'location-info').text(currLocation || ' ');
+	    debouncedGetLocation(selection, coord);
+	  }
 
-	            html = html.replace(/\*(.*?)\*/g, '<em>$1</em>');   // emphasis
-	            html = html.replace(/\{br\}/g, '<br/><br/>');       // linebreak
+	  var debouncedGetLocation = debounce(getLocation, 250);
 
-	            if (options.buttonText && options.buttonCallback) {
-	                html += '<div class="button-section">' +
-	                    '<button href="#" class="button action">' + options.buttonText + '</button></div>';
-	            }
+	  function getLocation(selection, coord) {
+	    if (!services.geocoder) {
+	      currLocation = _t('info_panels.location.unknown_location');
+	      selection.selectAll('.location-info').text(currLocation);
+	    } else {
+	      services.geocoder.reverse(coord, function (err, result) {
+	        currLocation = result ? result.display_name : _t('info_panels.location.unknown_location');
+	        selection.selectAll('.location-info').text(currLocation);
+	      });
+	    }
+	  }
 
-	            var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
-	            tooltip
-	                .classed(classes, true)
-	                .selectAll('.popover-inner')
-	                .html(html);
-
-	            if (options.buttonText && options.buttonCallback) {
-	                var button = tooltip.selectAll('.button-section .button.action');
-	                button
-	                    .on('click', function() {
-	                        event.preventDefault();
-	                        options.buttonCallback();
-	                    });
-	            }
+	  var panel = function panel(selection) {
+	    selection.call(redraw);
+	    context.surface().on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function () {
+	      selection.call(redraw);
+	    });
+	  };
 
-	            var tip = copyBox(tooltip.node().getBoundingClientRect()),
-	                w = containerNode.clientWidth,
-	                h = containerNode.clientHeight,
-	                tooltipWidth = 200,
-	                tooltipArrow = 5,
-	                side, pos;
+	  panel.off = function () {
+	    context.surface().on('.info-location', null);
+	  };
 
+	  panel.id = 'location';
+	  panel.label = _t.html('info_panels.location.title');
+	  panel.key = _t('info_panels.location.key');
+	  return panel;
+	}
 
-	            // hack: this will have bottom placement,
-	            // so need to reserve extra space for the tooltip illustration.
-	            if (options.tooltipClass === 'intro-mouse') {
-	                tip.height += 80;
-	            }
+	function uiPanelMeasurement(context) {
+	  function radiansToMeters(r) {
+	    // using WGS84 authalic radius (6371007.1809 m)
+	    return r * 6371007.1809;
+	  }
 
-	            // trim box dimensions to just the portion that fits in the container..
-	            if (tooltipBox.top + tooltipBox.height > h) {
-	                tooltipBox.height -= (tooltipBox.top + tooltipBox.height - h);
-	            }
-	            if (tooltipBox.left + tooltipBox.width > w) {
-	                tooltipBox.width -= (tooltipBox.left + tooltipBox.width - w);
-	            }
+	  function steradiansToSqmeters(r) {
+	    // http://gis.stackexchange.com/a/124857/40446
+	    return r / (4 * Math.PI) * 510065621724000;
+	  }
 
-	            // determine tooltip placement..
+	  function toLineString(feature) {
+	    if (feature.type === 'LineString') return feature;
+	    var result = {
+	      type: 'LineString',
+	      coordinates: []
+	    };
 
-	            if (tooltipBox.top + tooltipBox.height < 100) {
-	                // tooltip below box..
-	                side = 'bottom';
-	                pos = [
-	                    tooltipBox.left + tooltipBox.width / 2 - tip.width / 2,
-	                    tooltipBox.top + tooltipBox.height
-	                ];
+	    if (feature.type === 'Polygon') {
+	      result.coordinates = feature.coordinates[0];
+	    } else if (feature.type === 'MultiPolygon') {
+	      result.coordinates = feature.coordinates[0][0];
+	    }
 
-	            } else if (tooltipBox.top > h - 140) {
-	                // tooltip above box..
-	                side = 'top';
-	                pos = [
-	                    tooltipBox.left + tooltipBox.width / 2 - tip.width / 2,
-	                    tooltipBox.top - tip.height
-	                ];
+	    return result;
+	  }
 
-	            } else {
-	                // tooltip to the side of the tooltipBox..
-	                var tipY = tooltipBox.top + tooltipBox.height / 2 - tip.height / 2;
+	  var _isImperial = !_mainLocalizer.usesMetric();
 
-	                if (_mainLocalizer.textDirection() === 'rtl') {
-	                    if (tooltipBox.left - tooltipWidth - tooltipArrow < 70) {
-	                        side = 'right';
-	                        pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
+	  function redraw(selection) {
+	    var graph = context.graph();
+	    var selectedNoteID = context.selectedNoteID();
+	    var osm = services.osm;
+	    var localeCode = _mainLocalizer.localeCode();
+	    var heading;
+	    var center, location, centroid;
+	    var closed, geometry;
+	    var totalNodeCount,
+	        length = 0,
+	        area = 0,
+	        distance;
+
+	    if (selectedNoteID && osm) {
+	      // selected 1 note
+	      var note = osm.getNote(selectedNoteID);
+	      heading = _t.html('note.note') + ' ' + selectedNoteID;
+	      location = note.loc;
+	      geometry = 'note';
+	    } else {
+	      // selected 1..n entities
+	      var selectedIDs = context.selectedIDs().filter(function (id) {
+	        return context.hasEntity(id);
+	      });
+	      var selected = selectedIDs.map(function (id) {
+	        return context.entity(id);
+	      });
+	      heading = selected.length === 1 ? selected[0].id : _t.html('info_panels.selected', {
+	        n: selected.length
+	      });
 
-	                    } else {
-	                        side = 'left';
-	                        pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
-	                    }
+	      if (selected.length) {
+	        var extent = geoExtent();
 
-	                } else {
-	                    if (tooltipBox.left + tooltipBox.width + tooltipArrow + tooltipWidth > w - 70) {
-	                        side = 'left';
-	                        pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
-	                    }
-	                    else {
-	                        side = 'right';
-	                        pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
-	                    }
-	                }
-	            }
+	        for (var i in selected) {
+	          var entity = selected[i];
 
-	            if (options.duration !== 0 || !tooltip.classed(side)) {
-	                tooltip.call(uiToggle(true));
-	            }
+	          extent._extend(entity.extent(graph));
 
-	            tooltip
-	                .style('top', pos[1] + 'px')
-	                .style('left', pos[0] + 'px')
-	                .attr('class', classes + ' ' + side);
+	          geometry = entity.geometry(graph);
 
+	          if (geometry === 'line' || geometry === 'area') {
+	            closed = entity.type === 'relation' || entity.isClosed() && !entity.isDegenerate();
+	            var feature = entity.asGeoJSON(graph);
+	            length += radiansToMeters(d3_geoLength(toLineString(feature)));
+	            centroid = d3_geoPath(context.projection).centroid(entity.asGeoJSON(graph));
+	            centroid = centroid && context.projection.invert(centroid);
 
-	            // shift popover-inner if it is very close to the top or bottom edge
-	            // (doesn't affect the placement of the popover-arrow)
-	            var shiftY = 0;
-	            if (side === 'left' || side === 'right') {
-	                if (pos[1] < 60) {
-	                    shiftY = 60 - pos[1];
-	                }
-	                else if (pos[1] + tip.height > h - 100) {
-	                    shiftY = h - pos[1] - tip.height - 100;
-	                }
+	            if (!centroid || !isFinite(centroid[0]) || !isFinite(centroid[1])) {
+	              centroid = entity.extent(graph).center();
 	            }
-	            tooltip.selectAll('.popover-inner')
-	                .style('top', shiftY + 'px');
 
-	        } else {
-	            tooltip
-	                .classed('in', false)
-	                .call(uiToggle(false));
+	            if (closed) {
+	              area += steradiansToSqmeters(entity.area(graph));
+	            }
+	          }
 	        }
 
-	        curtain.cut(box, options.duration);
-
-	        return tooltip;
-	    };
-
+	        if (selected.length > 1) {
+	          geometry = null;
+	          closed = null;
+	          centroid = null;
+	        }
 
-	    curtain.cut = function(datum, duration) {
-	        darkness.datum(datum)
-	            .interrupt();
+	        if (selected.length === 2 && selected[0].type === 'node' && selected[1].type === 'node') {
+	          distance = geoSphericalDistance(selected[0].loc, selected[1].loc);
+	        }
 
-	        var selection;
-	        if (duration === 0) {
-	            selection = darkness;
+	        if (selected.length === 1 && selected[0].type === 'node') {
+	          location = selected[0].loc;
 	        } else {
-	            selection = darkness
-	                .transition()
-	                .duration(duration || 600)
-	                .ease(linear$1);
-	        }
-
-	        selection
-	            .attr('d', function(d) {
-	                var containerWidth = containerNode.clientWidth;
-	                var containerHeight = containerNode.clientHeight;
-	                var string = 'M 0,0 L 0,' + containerHeight + ' L ' +
-	                    containerWidth + ',' + containerHeight + 'L' +
-	                    containerWidth + ',0 Z';
-
-	                if (!d) { return string; }
-	                return string + 'M' +
-	                    d.left + ',' + d.top + 'L' +
-	                    d.left + ',' + (d.top + d.height) + 'L' +
-	                    (d.left + d.width) + ',' + (d.top + d.height) + 'L' +
-	                    (d.left + d.width) + ',' + (d.top) + 'Z';
+	          totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
+	        }
 
-	            });
-	    };
+	        if (!location && !centroid) {
+	          center = extent.center();
+	        }
+	      }
+	    }
 
+	    selection.html('');
 
-	    curtain.remove = function() {
-	        surface.remove();
-	        tooltip.remove();
-	        select(window).on('resize.curtain', null);
-	    };
+	    if (heading) {
+	      selection.append('h4').attr('class', 'measurement-heading').html(heading);
+	    }
 
+	    var list = selection.append('ul');
+	    var coordItem;
 
-	    // ClientRects are immutable, so copy them to an object,
-	    // in case we need to trim the height/width.
-	    function copyBox(src) {
-	        return {
-	            top: src.top,
-	            right: src.right,
-	            bottom: src.bottom,
-	            left: src.left,
-	            width: src.width,
-	            height: src.height
-	        };
+	    if (geometry) {
+	      list.append('li').call(_t.append('info_panels.measurement.geometry', {
+	        suffix: ':'
+	      })).append('span').html(closed ? _t.html('info_panels.measurement.closed_' + geometry) : _t.html('geometry.' + geometry));
 	    }
 
+	    if (totalNodeCount) {
+	      list.append('li').call(_t.append('info_panels.measurement.node_count', {
+	        suffix: ':'
+	      })).append('span').text(totalNodeCount.toLocaleString(localeCode));
+	    }
 
-	    return curtain;
-	}
+	    if (area) {
+	      list.append('li').call(_t.append('info_panels.measurement.area', {
+	        suffix: ':'
+	      })).append('span').text(displayArea(area, _isImperial));
+	    }
 
-	function uiIntroWelcome(context, reveal) {
-	    var dispatch$1 = dispatch('done');
+	    if (length) {
+	      list.append('li').call(_t.append('info_panels.measurement.' + (closed ? 'perimeter' : 'length'), {
+	        suffix: ':'
+	      })).append('span').text(displayLength(length, _isImperial));
+	    }
 
-	    var chapter = {
-	        title: 'intro.welcome.title'
-	    };
+	    if (typeof distance === 'number') {
+	      list.append('li').call(_t.append('info_panels.measurement.distance', {
+	        suffix: ':'
+	      })).append('span').text(displayLength(distance, _isImperial));
+	    }
 
+	    if (location) {
+	      coordItem = list.append('li').call(_t.append('info_panels.measurement.location', {
+	        suffix: ':'
+	      }));
+	      coordItem.append('span').text(dmsCoordinatePair(location));
+	      coordItem.append('span').text(decimalCoordinatePair(location));
+	    }
 
-	    function welcome() {
-	        context.map().centerZoom([-85.63591, 41.94285], 19);
-	        reveal('.intro-nav-wrap .chapter-welcome',
-	            helpString('intro.welcome.welcome'),
-	            { buttonText: _t('intro.ok'), buttonCallback: practice }
-	        );
+	    if (centroid) {
+	      coordItem = list.append('li').call(_t.append('info_panels.measurement.centroid', {
+	        suffix: ':'
+	      }));
+	      coordItem.append('span').text(dmsCoordinatePair(centroid));
+	      coordItem.append('span').text(decimalCoordinatePair(centroid));
 	    }
 
-	    function practice() {
-	        reveal('.intro-nav-wrap .chapter-welcome',
-	            helpString('intro.welcome.practice'),
-	            { buttonText: _t('intro.ok'), buttonCallback: words }
-	        );
+	    if (center) {
+	      coordItem = list.append('li').call(_t.append('info_panels.measurement.center', {
+	        suffix: ':'
+	      }));
+	      coordItem.append('span').text(dmsCoordinatePair(center));
+	      coordItem.append('span').text(decimalCoordinatePair(center));
 	    }
 
-	    function words() {
-	        reveal('.intro-nav-wrap .chapter-welcome',
-	            helpString('intro.welcome.words'),
-	            { buttonText: _t('intro.ok'), buttonCallback: chapters }
-	        );
+	    if (length || area || typeof distance === 'number') {
+	      var toggle = _isImperial ? 'imperial' : 'metric';
+	      selection.append('a').call(_t.append('info_panels.measurement.' + toggle)).attr('href', '#').attr('class', 'button button-toggle-units').on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        _isImperial = !_isImperial;
+	        selection.call(redraw);
+	      });
 	    }
+	  }
+
+	  var panel = function panel(selection) {
+	    selection.call(redraw);
+	    context.map().on('drawn.info-measurement', function () {
+	      selection.call(redraw);
+	    });
+	    context.on('enter.info-measurement', function () {
+	      selection.call(redraw);
+	    });
+	  };
 
+	  panel.off = function () {
+	    context.map().on('drawn.info-measurement', null);
+	    context.on('enter.info-measurement', null);
+	  };
 
-	    function chapters() {
-	        dispatch$1.call('done');
-	        reveal('.intro-nav-wrap .chapter-navigation',
-	            helpString('intro.welcome.chapters', { next: _t('intro.navigation.title') })
-	        );
-	    }
+	  panel.id = 'measurement';
+	  panel.label = _t.html('info_panels.measurement.title');
+	  panel.key = _t('info_panels.measurement.key');
+	  return panel;
+	}
 
+	var uiInfoPanels = {
+	  background: uiPanelBackground,
+	  history: uiPanelHistory,
+	  location: uiPanelLocation,
+	  measurement: uiPanelMeasurement
+	};
 
-	    chapter.enter = function() {
-	        welcome();
-	    };
+	function uiInfo(context) {
+	  var ids = Object.keys(uiInfoPanels);
+	  var wasActive = ['measurement'];
+	  var panels = {};
+	  var active = {}; // create panels
 
+	  ids.forEach(function (k) {
+	    if (!panels[k]) {
+	      panels[k] = uiInfoPanels[k](context);
+	      active[k] = false;
+	    }
+	  });
 
-	    chapter.exit = function() {
-	        context.container().select('.curtain-tooltip.intro-mouse')
-	            .selectAll('.counter')
-	            .remove();
-	    };
+	  function info(selection) {
+	    function redraw() {
+	      var activeids = ids.filter(function (k) {
+	        return active[k];
+	      }).sort();
+	      var containers = infoPanels.selectAll('.panel-container').data(activeids, function (k) {
+	        return k;
+	      });
+	      containers.exit().style('opacity', 1).transition().duration(200).style('opacity', 0).on('end', function (d) {
+	        select(this).call(panels[d].off).remove();
+	      });
+	      var enter = containers.enter().append('div').attr('class', function (d) {
+	        return 'fillD2 panel-container panel-container-' + d;
+	      });
+	      enter.style('opacity', 0).transition().duration(200).style('opacity', 1);
+	      var title = enter.append('div').attr('class', 'panel-title fillD2');
+	      title.append('h3').html(function (d) {
+	        return panels[d].label;
+	      });
+	      title.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function (d3_event, d) {
+	        d3_event.stopImmediatePropagation();
+	        d3_event.preventDefault();
+	        info.toggle(d);
+	      }).call(svgIcon('#iD-icon-close'));
+	      enter.append('div').attr('class', function (d) {
+	        return 'panel-content panel-content-' + d;
+	      }); // redraw the panels
+
+	      infoPanels.selectAll('.panel-content').each(function (d) {
+	        select(this).call(panels[d]);
+	      });
+	    }
 
+	    info.toggle = function (which) {
+	      var activeids = ids.filter(function (k) {
+	        return active[k];
+	      });
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	      if (which) {
+	        // toggle one
+	        active[which] = !active[which];
 
+	        if (activeids.length === 1 && activeids[0] === which) {
+	          // none active anymore
+	          wasActive = [which];
+	        }
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	        context.container().select('.' + which + '-panel-toggle-item').classed('active', active[which]).select('input').property('checked', active[which]);
+	      } else {
+	        // toggle all
+	        if (activeids.length) {
+	          wasActive = activeids;
+	          activeids.forEach(function (k) {
+	            active[k] = false;
+	          });
+	        } else {
+	          wasActive.forEach(function (k) {
+	            active[k] = true;
+	          });
+	        }
+	      }
 
-	function uiIntroNavigation(context, reveal) {
-	    var dispatch$1 = dispatch('done');
-	    var timeouts = [];
-	    var hallId = 'n2061';
-	    var townHall = [-85.63591, 41.94285];
-	    var springStreetId = 'w397';
-	    var springStreetEndId = 'n1834';
-	    var springStreet = [-85.63582, 41.94255];
-	    var onewayField = _mainPresetIndex.field('oneway');
-	    var maxspeedField = _mainPresetIndex.field('maxspeed');
-
-
-	    var chapter = {
-	        title: 'intro.navigation.title'
+	      redraw();
 	    };
 
+	    var infoPanels = selection.selectAll('.info-panels').data([0]);
+	    infoPanels = infoPanels.enter().append('div').attr('class', 'info-panels').merge(infoPanels);
+	    redraw();
+	    context.keybinding().on(uiCmd('⌘' + _t('info_panels.key')), function (d3_event) {
+	      d3_event.stopImmediatePropagation();
+	      d3_event.preventDefault();
+	      info.toggle();
+	    });
+	    ids.forEach(function (k) {
+	      var key = _t('info_panels.' + k + '.key', {
+	        "default": null
+	      });
+	      if (!key) return;
+	      context.keybinding().on(uiCmd('⌘⇧' + key), function (d3_event) {
+	        d3_event.stopImmediatePropagation();
+	        d3_event.preventDefault();
+	        info.toggle(k);
+	      });
+	    });
+	  }
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
-	    }
+	  return info;
+	}
 
+	function pointBox(loc, context) {
+	  var rect = context.surfaceRect();
+	  var point = context.curtainProjection(loc);
+	  return {
+	    left: point[0] + rect.left - 40,
+	    top: point[1] + rect.top - 60,
+	    width: 80,
+	    height: 90
+	  };
+	}
+	function pad(locOrBox, padding, context) {
+	  var box;
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
-	    }
+	  if (locOrBox instanceof Array) {
+	    var rect = context.surfaceRect();
+	    var point = context.curtainProjection(locOrBox);
+	    box = {
+	      left: point[0] + rect.left,
+	      top: point[1] + rect.top
+	    };
+	  } else {
+	    box = locOrBox;
+	  }
 
+	  return {
+	    left: box.left - padding,
+	    top: box.top - padding,
+	    width: (box.width || 0) + 2 * padding,
+	    height: (box.width || 0) + 2 * padding
+	  };
+	}
+	function icon(name, svgklass, useklass) {
+	  return '<svg class="icon ' + (svgklass || '') + '">' + '<use xlink:href="' + name + '"' + (useklass ? ' class="' + useklass + '"' : '') + '></use></svg>';
+	}
+	var helpStringReplacements; // Returns the localized HTML element for `id` with a standardized set of icon, key, and
+	// label replacements suitable for tutorials and documentation. Optionally supplemented
+	// with custom `replacements`
 
-	    function isTownHallSelected() {
-	        var ids = context.selectedIDs();
-	        return ids.length === 1 && ids[0] === hallId;
+	function helpHtml(id, replacements) {
+	  // only load these the first time
+	  if (!helpStringReplacements) {
+	    helpStringReplacements = {
+	      // insert icons corresponding to various UI elements
+	      point_icon: icon('#iD-icon-point', 'inline'),
+	      line_icon: icon('#iD-icon-line', 'inline'),
+	      area_icon: icon('#iD-icon-area', 'inline'),
+	      note_icon: icon('#iD-icon-note', 'inline add-note'),
+	      plus: icon('#iD-icon-plus', 'inline'),
+	      minus: icon('#iD-icon-minus', 'inline'),
+	      layers_icon: icon('#iD-icon-layers', 'inline'),
+	      data_icon: icon('#iD-icon-data', 'inline'),
+	      inspect: icon('#iD-icon-inspect', 'inline'),
+	      help_icon: icon('#iD-icon-help', 'inline'),
+	      undo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo', 'inline'),
+	      redo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-undo' : '#iD-icon-redo', 'inline'),
+	      save_icon: icon('#iD-icon-save', 'inline'),
+	      // operation icons
+	      circularize_icon: icon('#iD-operation-circularize', 'inline operation'),
+	      continue_icon: icon('#iD-operation-continue', 'inline operation'),
+	      copy_icon: icon('#iD-operation-copy', 'inline operation'),
+	      delete_icon: icon('#iD-operation-delete', 'inline operation'),
+	      disconnect_icon: icon('#iD-operation-disconnect', 'inline operation'),
+	      downgrade_icon: icon('#iD-operation-downgrade', 'inline operation'),
+	      extract_icon: icon('#iD-operation-extract', 'inline operation'),
+	      merge_icon: icon('#iD-operation-merge', 'inline operation'),
+	      move_icon: icon('#iD-operation-move', 'inline operation'),
+	      orthogonalize_icon: icon('#iD-operation-orthogonalize', 'inline operation'),
+	      paste_icon: icon('#iD-operation-paste', 'inline operation'),
+	      reflect_long_icon: icon('#iD-operation-reflect-long', 'inline operation'),
+	      reflect_short_icon: icon('#iD-operation-reflect-short', 'inline operation'),
+	      reverse_icon: icon('#iD-operation-reverse', 'inline operation'),
+	      rotate_icon: icon('#iD-operation-rotate', 'inline operation'),
+	      split_icon: icon('#iD-operation-split', 'inline operation'),
+	      straighten_icon: icon('#iD-operation-straighten', 'inline operation'),
+	      // interaction icons
+	      leftclick: icon('#iD-walkthrough-mouse-left', 'inline operation'),
+	      rightclick: icon('#iD-walkthrough-mouse-right', 'inline operation'),
+	      mousewheel_icon: icon('#iD-walkthrough-mousewheel', 'inline operation'),
+	      tap_icon: icon('#iD-walkthrough-tap', 'inline operation'),
+	      doubletap_icon: icon('#iD-walkthrough-doubletap', 'inline operation'),
+	      longpress_icon: icon('#iD-walkthrough-longpress', 'inline operation'),
+	      touchdrag_icon: icon('#iD-walkthrough-touchdrag', 'inline operation'),
+	      pinch_icon: icon('#iD-walkthrough-pinch-apart', 'inline operation'),
+	      // insert keys; may be localized and platform-dependent
+	      shift: uiCmd.display('⇧'),
+	      alt: uiCmd.display('⌥'),
+	      "return": uiCmd.display('↵'),
+	      esc: _t.html('shortcuts.key.esc'),
+	      space: _t.html('shortcuts.key.space'),
+	      add_note_key: _t.html('modes.add_note.key'),
+	      help_key: _t.html('help.key'),
+	      shortcuts_key: _t.html('shortcuts.toggle.key'),
+	      // reference localized UI labels directly so that they'll always match
+	      save: _t.html('save.title'),
+	      undo: _t.html('undo.title'),
+	      redo: _t.html('redo.title'),
+	      upload: _t.html('commit.save'),
+	      point: _t.html('modes.add_point.title'),
+	      line: _t.html('modes.add_line.title'),
+	      area: _t.html('modes.add_area.title'),
+	      note: _t.html('modes.add_note.label'),
+	      circularize: _t.html('operations.circularize.title'),
+	      "continue": _t.html('operations.continue.title'),
+	      copy: _t.html('operations.copy.title'),
+	      "delete": _t.html('operations.delete.title'),
+	      disconnect: _t.html('operations.disconnect.title'),
+	      downgrade: _t.html('operations.downgrade.title'),
+	      extract: _t.html('operations.extract.title'),
+	      merge: _t.html('operations.merge.title'),
+	      move: _t.html('operations.move.title'),
+	      orthogonalize: _t.html('operations.orthogonalize.title'),
+	      paste: _t.html('operations.paste.title'),
+	      reflect_long: _t.html('operations.reflect.title.long'),
+	      reflect_short: _t.html('operations.reflect.title.short'),
+	      reverse: _t.html('operations.reverse.title'),
+	      rotate: _t.html('operations.rotate.title'),
+	      split: _t.html('operations.split.title'),
+	      straighten: _t.html('operations.straighten.title'),
+	      map_data: _t.html('map_data.title'),
+	      osm_notes: _t.html('map_data.layers.notes.title'),
+	      fields: _t.html('inspector.fields'),
+	      tags: _t.html('inspector.tags'),
+	      relations: _t.html('inspector.relations'),
+	      new_relation: _t.html('inspector.new_relation'),
+	      turn_restrictions: _t.html('_tagging.presets.fields.restrictions.label'),
+	      background_settings: _t.html('background.description'),
+	      imagery_offset: _t.html('background.fix_misalignment'),
+	      start_the_walkthrough: _t.html('splash.walkthrough'),
+	      help: _t.html('help.title'),
+	      ok: _t.html('intro.ok')
+	    };
+
+	    for (var key in helpStringReplacements) {
+	      helpStringReplacements[key] = {
+	        html: helpStringReplacements[key]
+	      };
 	    }
+	  }
 
+	  var reps;
 
-	    function dragMap() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
+	  if (replacements) {
+	    reps = Object.assign(replacements, helpStringReplacements);
+	  } else {
+	    reps = helpStringReplacements;
+	  }
 
-	        var msec = transitionTime(townHall, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(townHall, 19, msec);
+	  return _t.html(id, reps) // use keyboard key styling for shortcuts
+	  .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
+	}
 
-	        timeout(function() {
-	            var centerStart = context.map().center();
+	function slugify(text) {
+	  return text.toString().toLowerCase().replace(/\s+/g, '-') // Replace spaces with -
+	  .replace(/[^\w\-]+/g, '') // Remove all non-word chars
+	  .replace(/\-\-+/g, '-') // Replace multiple - with single -
+	  .replace(/^-+/, '') // Trim - from start of text
+	  .replace(/-+$/, ''); // Trim - from end of text
+	} // console warning for missing walkthrough names
 
-	            var textId = context.lastPointerType() === 'mouse' ? 'drag' : 'drag_touch';
-	            var dragString = helpString('intro.navigation.map_info') + '{br}' + helpString('intro.navigation.' + textId);
-	            reveal('.surface', dragString);
-	            context.map().on('drawn.intro', function() {
-	                reveal('.surface', dragString, { duration: 0 });
-	            });
 
-	            context.map().on('move.intro', function() {
-	                var centerNow = context.map().center();
-	                if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
-	                    context.map().on('move.intro', null);
-	                    timeout(function() { continueTo(zoomMap); }, 3000);
-	                }
-	            });
+	var missingStrings = {};
 
-	        }, msec + 100);
+	function checkKey(key, text) {
+	  if (_t(key, {
+	    "default": undefined
+	  }) === undefined) {
+	    if (missingStrings.hasOwnProperty(key)) return; // warn once
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
-	    }
+	    missingStrings[key] = text;
+	    var missing = key + ': ' + text;
+	    if (typeof console !== 'undefined') console.log(missing); // eslint-disable-line
+	  }
+	}
 
+	function localize(obj) {
+	  var key; // Assign name if entity has one..
 
-	    function zoomMap() {
-	        var zoomStart = context.map().zoom();
+	  var name = obj.tags && obj.tags.name;
 
-	        var textId = context.lastPointerType() === 'mouse' ? 'zoom' : 'zoom_touch';
-	        var zoomString = helpString('intro.navigation.' + textId);
+	  if (name) {
+	    key = 'intro.graph.name.' + slugify(name);
+	    obj.tags.name = _t(key, {
+	      "default": name
+	    });
+	    checkKey(key, name);
+	  } // Assign street name if entity has one..
 
-	        reveal('.surface', zoomString);
 
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', zoomString, { duration: 0 });
-	        });
+	  var street = obj.tags && obj.tags['addr:street'];
 
-	        context.map().on('move.intro', function() {
-	            if (context.map().zoom() !== zoomStart) {
-	                context.map().on('move.intro', null);
-	                timeout(function() { continueTo(features); }, 3000);
-	            }
-	        });
+	  if (street) {
+	    key = 'intro.graph.name.' + slugify(street);
+	    obj.tags['addr:street'] = _t(key, {
+	      "default": street
+	    });
+	    checkKey(key, street); // Add address details common across walkthrough..
+
+	    var addrTags = ['block_number', 'city', 'county', 'district', 'hamlet', 'neighbourhood', 'postcode', 'province', 'quarter', 'state', 'subdistrict', 'suburb'];
+	    addrTags.forEach(function (k) {
+	      var key = 'intro.graph.' + k;
+	      var tag = 'addr:' + k;
+	      var val = obj.tags && obj.tags[tag];
+	      var str = _t(key, {
+	        "default": val
+	      });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
+	      if (str) {
+	        if (str.match(/^<.*>$/) !== null) {
+	          delete obj.tags[tag];
+	        } else {
+	          obj.tags[tag] = str;
 	        }
-	    }
-
-
-	    function features() {
-	        var onClick = function() { continueTo(pointsLinesAreas); };
-
-	        reveal('.surface', helpString('intro.navigation.features'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	      }
+	    });
+	  }
 
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', helpString('intro.navigation.features'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	  return obj;
+	} // Used to detect squareness.. some duplicataion of code from actionOrthogonalize.
 
-	        function continueTo(nextStep) {
-	            context.map().on('drawn.intro', null);
-	            nextStep();
-	        }
-	    }
+	function isMostlySquare(points) {
+	  // note: uses 15 here instead of the 12 from actionOrthogonalize because
+	  // actionOrthogonalize can actually straighten some larger angles as it iterates
+	  var threshold = 15; // degrees within right or straight
 
-	    function pointsLinesAreas() {
-	        var onClick = function() { continueTo(nodesWays); };
+	  var lowerBound = Math.cos((90 - threshold) * Math.PI / 180); // near right
 
-	        reveal('.surface', helpString('intro.navigation.points_lines_areas'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	  var upperBound = Math.cos(threshold * Math.PI / 180); // near straight
 
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', helpString('intro.navigation.points_lines_areas'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	  for (var i = 0; i < points.length; i++) {
+	    var a = points[(i - 1 + points.length) % points.length];
+	    var origin = points[i];
+	    var b = points[(i + 1) % points.length];
+	    var dotp = geoVecNormalizedDot(a, b, origin);
+	    var mag = Math.abs(dotp);
 
-	        function continueTo(nextStep) {
-	            context.map().on('drawn.intro', null);
-	            nextStep();
-	        }
+	    if (mag > lowerBound && mag < upperBound) {
+	      return false;
 	    }
+	  }
 
-	    function nodesWays() {
-	        var onClick = function() { continueTo(clickTownHall); };
+	  return true;
+	}
+	function selectMenuItem(context, operation) {
+	  return context.container().select('.edit-menu .edit-menu-item-' + operation);
+	}
+	function transitionTime(point1, point2) {
+	  var distance = geoSphericalDistance(point1, point2);
 
-	        reveal('.surface', helpString('intro.navigation.nodes_ways'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	  if (distance === 0) {
+	    return 0;
+	  } else if (distance < 80) {
+	    return 500;
+	  } else {
+	    return 1000;
+	  }
+	}
 
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', helpString('intro.navigation.nodes_ways'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	// hide class, which sets display=none, and a d3 transition for opacity.
+	// this will cause blinking when called repeatedly, so check that the
+	// value actually changes between calls.
 
-	        function continueTo(nextStep) {
-	            context.map().on('drawn.intro', null);
-	            nextStep();
-	        }
-	    }
+	function uiToggle(show, callback) {
+	  return function (selection) {
+	    selection.style('opacity', show ? 0 : 1).classed('hide', false).transition().style('opacity', show ? 1 : 0).on('end', function () {
+	      select(this).classed('hide', !show).style('opacity', null);
+	      if (callback) callback.apply(this);
+	    });
+	  };
+	}
 
-	    function clickTownHall() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
+	function uiCurtain(containerNode) {
+	  var surface = select(null),
+	      tooltip = select(null),
+	      darkness = select(null);
 
-	        var entity = context.hasEntity(hallId);
-	        if (!entity) { return; }
-	        reveal(null, null, { duration: 0 });
-	        context.map().centerZoomEase(entity.loc, 19, 500);
-
-	        timeout(function() {
-	            var entity = context.hasEntity(hallId);
-	            if (!entity) { return; }
-	            var box = pointBox(entity.loc, context);
-	            var textId = context.lastPointerType() === 'mouse' ? 'click_townhall' : 'tap_townhall';
-	            reveal(box, helpString('intro.navigation.' + textId));
-
-	            context.map().on('move.intro drawn.intro', function() {
-	                var entity = context.hasEntity(hallId);
-	                if (!entity) { return; }
-	                var box = pointBox(entity.loc, context);
-	                reveal(box, helpString('intro.navigation.' + textId), { duration: 0 });
-	            });
+	  function curtain(selection) {
+	    surface = selection.append('svg').attr('class', 'curtain').style('top', 0).style('left', 0);
+	    darkness = surface.append('path').attr('x', 0).attr('y', 0).attr('class', 'curtain-darkness');
+	    select(window).on('resize.curtain', resize);
+	    tooltip = selection.append('div').attr('class', 'tooltip');
+	    tooltip.append('div').attr('class', 'popover-arrow');
+	    tooltip.append('div').attr('class', 'popover-inner');
+	    resize();
 
-	            context.on('enter.intro', function() {
-	                if (isTownHallSelected()) { continueTo(selectedTownHall); }
-	            });
+	    function resize() {
+	      surface.attr('width', containerNode.clientWidth).attr('height', containerNode.clientHeight);
+	      curtain.cut(darkness.datum());
+	    }
+	  }
+	  /**
+	   * Reveal cuts the curtain to highlight the given box,
+	   * and shows a tooltip with instructions next to the box.
+	   *
+	   * @param  {String|ClientRect} [box]   box used to cut the curtain
+	   * @param  {String}    [text]          text for a tooltip
+	   * @param  {Object}    [options]
+	   * @param  {string}    [options.tooltipClass]    optional class to add to the tooltip
+	   * @param  {integer}   [options.duration]        transition time in milliseconds
+	   * @param  {string}    [options.buttonText]      if set, create a button with this text label
+	   * @param  {function}  [options.buttonCallback]  if set, the callback for the button
+	   * @param  {function}  [options.padding]         extra margin in px to put around bbox
+	   * @param  {String|ClientRect} [options.tooltipBox]  box for tooltip position, if different from box for the curtain
+	   */
 
-	        }, 550);  // after centerZoomEase
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	  curtain.reveal = function (box, html, options) {
+	    options = options || {};
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    if (typeof box === 'string') {
+	      box = select(box).node();
 	    }
 
+	    if (box && box.getBoundingClientRect) {
+	      box = copyBox(box.getBoundingClientRect());
+	      var containerRect = containerNode.getBoundingClientRect();
+	      box.top -= containerRect.top;
+	      box.left -= containerRect.left;
+	    }
 
-	    function selectedTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
-
-	        var entity = context.hasEntity(hallId);
-	        if (!entity) { return clickTownHall(); }
-
-	        var box = pointBox(entity.loc, context);
-	        var onClick = function() { continueTo(editorTownHall); };
+	    if (box && options.padding) {
+	      box.top -= options.padding;
+	      box.left -= options.padding;
+	      box.bottom += options.padding;
+	      box.right += options.padding;
+	      box.height += options.padding * 2;
+	      box.width += options.padding * 2;
+	    }
 
-	        reveal(box, helpString('intro.navigation.selected_townhall'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	    var tooltipBox;
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var entity = context.hasEntity(hallId);
-	            if (!entity) { return; }
-	            var box = pointBox(entity.loc, context);
-	            reveal(box, helpString('intro.navigation.selected_townhall'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	    if (options.tooltipBox) {
+	      tooltipBox = options.tooltipBox;
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	      if (typeof tooltipBox === 'string') {
+	        tooltipBox = select(tooltipBox).node();
+	      }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	      if (tooltipBox && tooltipBox.getBoundingClientRect) {
+	        tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
+	      }
+	    } else {
+	      tooltipBox = box;
 	    }
 
+	    if (tooltipBox && html) {
+	      if (html.indexOf('**') !== -1) {
+	        if (html.indexOf('<span') === 0) {
+	          html = html.replace(/^(<span.*?>)(.+?)(\*\*)/, '$1<span>$2</span>$3');
+	        } else {
+	          html = html.replace(/^(.+?)(\*\*)/, '<span>$1</span>$2');
+	        } // pseudo markdown bold text for the instruction section..
 
-	    function editorTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
-
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	        var onClick = function() { continueTo(presetTownHall); };
+	        html = html.replace(/\*\*(.*?)\*\*/g, '<span class="instruction">$1</span>');
+	      }
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.navigation.editor_townhall'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	      html = html.replace(/\*(.*?)\*/g, '<em>$1</em>'); // emphasis
 
-	        context.on('exit.intro', function() {
-	            continueTo(clickTownHall);
-	        });
+	      html = html.replace(/\{br\}/g, '<br/><br/>'); // linebreak
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	      if (options.buttonText && options.buttonCallback) {
+	        html += '<div class="button-section">' + '<button href="#" class="button action">' + options.buttonText + '</button></div>';
+	      }
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            nextStep();
-	        }
-	    }
+	      var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
+	      tooltip.classed(classes, true).selectAll('.popover-inner').html(html);
 
+	      if (options.buttonText && options.buttonCallback) {
+	        var button = tooltip.selectAll('.button-section .button.action');
+	        button.on('click', function (d3_event) {
+	          d3_event.preventDefault();
+	          options.buttonCallback();
+	        });
+	      }
 
-	    function presetTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
+	      var tip = copyBox(tooltip.node().getBoundingClientRect()),
+	          w = containerNode.clientWidth,
+	          h = containerNode.clientHeight,
+	          tooltipWidth = 200,
+	          tooltipArrow = 5,
+	          side,
+	          pos; // hack: this will have bottom placement,
+	      // so need to reserve extra space for the tooltip illustration.
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	      if (options.tooltipClass === 'intro-mouse') {
+	        tip.height += 80;
+	      } // trim box dimensions to just the portion that fits in the container..
 
-	        // preset match, in case the user happened to change it.
-	        var entity = context.entity(context.selectedIDs()[0]);
-	        var preset = _mainPresetIndex.match(entity, context.graph());
 
-	        var onClick = function() { continueTo(fieldsTownHall); };
+	      if (tooltipBox.top + tooltipBox.height > h) {
+	        tooltipBox.height -= tooltipBox.top + tooltipBox.height - h;
+	      }
 
-	        reveal('.entity-editor-pane .section-feature-type',
-	            helpString('intro.navigation.preset_townhall', { preset: preset.name() }),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	      if (tooltipBox.left + tooltipBox.width > w) {
+	        tooltipBox.width -= tooltipBox.left + tooltipBox.width - w;
+	      } // determine tooltip placement..
 
-	        context.on('exit.intro', function() {
-	            continueTo(clickTownHall);
-	        });
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	      if (tooltipBox.top + tooltipBox.height < 100) {
+	        // tooltip below box..
+	        side = 'bottom';
+	        pos = [tooltipBox.left + tooltipBox.width / 2 - tip.width / 2, tooltipBox.top + tooltipBox.height];
+	      } else if (tooltipBox.top > h - 140) {
+	        // tooltip above box..
+	        side = 'top';
+	        pos = [tooltipBox.left + tooltipBox.width / 2 - tip.width / 2, tooltipBox.top - tip.height];
+	      } else {
+	        // tooltip to the side of the tooltipBox..
+	        var tipY = tooltipBox.top + tooltipBox.height / 2 - tip.height / 2;
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            nextStep();
+	        if (_mainLocalizer.textDirection() === 'rtl') {
+	          if (tooltipBox.left - tooltipWidth - tooltipArrow < 70) {
+	            side = 'right';
+	            pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
+	          } else {
+	            side = 'left';
+	            pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
+	          }
+	        } else {
+	          if (tooltipBox.left + tooltipBox.width + tooltipArrow + tooltipWidth > w - 70) {
+	            side = 'left';
+	            pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
+	          } else {
+	            side = 'right';
+	            pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
+	          }
 	        }
-	    }
+	      }
 
+	      if (options.duration !== 0 || !tooltip.classed(side)) {
+	        tooltip.call(uiToggle(true));
+	      }
 
-	    function fieldsTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
+	      tooltip.style('top', pos[1] + 'px').style('left', pos[0] + 'px').attr('class', classes + ' ' + side); // shift popover-inner if it is very close to the top or bottom edge
+	      // (doesn't affect the placement of the popover-arrow)
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	      var shiftY = 0;
 
-	        var onClick = function() { continueTo(closeTownHall); };
+	      if (side === 'left' || side === 'right') {
+	        if (pos[1] < 60) {
+	          shiftY = 60 - pos[1];
+	        } else if (pos[1] + tip.height > h - 100) {
+	          shiftY = h - pos[1] - tip.height - 100;
+	        }
+	      }
 
-	        reveal('.entity-editor-pane .section-preset-fields',
-	            helpString('intro.navigation.fields_townhall'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	      tooltip.selectAll('.popover-inner').style('top', shiftY + 'px');
+	    } else {
+	      tooltip.classed('in', false).call(uiToggle(false));
+	    }
 
-	        context.on('exit.intro', function() {
-	            continueTo(clickTownHall);
-	        });
+	    curtain.cut(box, options.duration);
+	    return tooltip;
+	  };
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	  curtain.cut = function (datum, duration) {
+	    darkness.datum(datum).interrupt();
+	    var selection;
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            nextStep();
-	        }
+	    if (duration === 0) {
+	      selection = darkness;
+	    } else {
+	      selection = darkness.transition().duration(duration || 600).ease(linear$1);
 	    }
 
+	    selection.attr('d', function (d) {
+	      var containerWidth = containerNode.clientWidth;
+	      var containerHeight = containerNode.clientHeight;
+	      var string = 'M 0,0 L 0,' + containerHeight + ' L ' + containerWidth + ',' + containerHeight + 'L' + containerWidth + ',0 Z';
+	      if (!d) return string;
+	      return string + 'M' + d.left + ',' + d.top + 'L' + d.left + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + d.top + 'Z';
+	    });
+	  };
+
+	  curtain.remove = function () {
+	    surface.remove();
+	    tooltip.remove();
+	    select(window).on('resize.curtain', null);
+	  }; // ClientRects are immutable, so copy them to an object,
+	  // in case we need to trim the height/width.
 
-	    function closeTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
 
-	        var selector = '.entity-editor-pane button.close svg use';
-	        var href = select(selector).attr('href') || '#iD-icon-close';
+	  function copyBox(src) {
+	    return {
+	      top: src.top,
+	      right: src.right,
+	      bottom: src.bottom,
+	      left: src.left,
+	      width: src.width,
+	      height: src.height
+	    };
+	  }
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.navigation.close_townhall', { button: icon(href, 'pre-text') })
-	        );
+	  return curtain;
+	}
 
-	        context.on('exit.intro', function() {
-	            continueTo(searchStreet);
-	        });
+	function uiIntroWelcome(context, reveal) {
+	  var dispatch = dispatch$8('done');
+	  var chapter = {
+	    title: 'intro.welcome.title'
+	  };
 
-	        context.history().on('change.intro', function() {
-	            // update the close icon in the tooltip if the user edits something.
-	            var selector = '.entity-editor-pane button.close svg use';
-	            var href = select(selector).attr('href') || '#iD-icon-close';
+	  function welcome() {
+	    context.map().centerZoom([-85.63591, 41.94285], 19);
+	    reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.welcome'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: practice
+	    });
+	  }
 
-	            reveal('.entity-editor-pane',
-	                helpString('intro.navigation.close_townhall', { button: icon(href, 'pre-text') }),
-	                { duration: 0 }
-	            );
-	        });
+	  function practice() {
+	    reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.practice'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: words
+	    });
+	  }
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	  function words() {
+	    reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.words'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: chapters
+	    });
+	  }
 
+	  function chapters() {
+	    dispatch.call('done');
+	    reveal('.intro-nav-wrap .chapter-navigation', helpHtml('intro.welcome.chapters', {
+	      next: _t('intro.navigation.title')
+	    }));
+	  }
 
-	    function searchStreet() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');  // ensure spring street exists
+	  chapter.enter = function () {
+	    welcome();
+	  };
 
-	        var msec = transitionTime(springStreet, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(springStreet, 19, msec);  // ..and user can see it
+	  chapter.exit = function () {
+	    context.container().select('.curtain-tooltip.intro-mouse').selectAll('.counter').remove();
+	  };
 
-	        timeout(function() {
-	            reveal('.search-header input',
-	                helpString('intro.navigation.search_street', { name: _t('intro.graph.name.spring-street') })
-	            );
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	            context.container().select('.search-header input')
-	                .on('keyup.intro', checkSearchResult);
-	        }, msec + 100);
-	    }
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
+	function uiIntroNavigation(context, reveal) {
+	  var dispatch = dispatch$8('done');
+	  var timeouts = [];
+	  var hallId = 'n2061';
+	  var townHall = [-85.63591, 41.94285];
+	  var springStreetId = 'w397';
+	  var springStreetEndId = 'n1834';
+	  var springStreet = [-85.63582, 41.94255];
+	  var onewayField = _mainPresetIndex.field('oneway');
+	  var maxspeedField = _mainPresetIndex.field('maxspeed');
+	  var chapter = {
+	    title: 'intro.navigation.title'
+	  };
 
-	    function checkSearchResult() {
-	        var first = context.container().select('.feature-list-item:nth-child(0n+2)');  // skip "No Results" item
-	        var firstName = first.select('.entity-name');
-	        var name = _t('intro.graph.name.spring-street');
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
-	        if (!firstName.empty() && firstName.text() === name) {
-	            reveal(first.node(),
-	                helpString('intro.navigation.choose_street', { name: name }),
-	                { duration: 300 }
-	            );
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	            context.on('exit.intro', function() {
-	                continueTo(selectedStreet);
-	            });
+	  function isTownHallSelected() {
+	    var ids = context.selectedIDs();
+	    return ids.length === 1 && ids[0] === hallId;
+	  }
 
-	            context.container().select('.search-header input')
-	                .on('keydown.intro', eventCancel, true)
-	                .on('keyup.intro', null);
-	        }
+	  function dragMap() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var msec = transitionTime(townHall, context.map().center());
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.container().select('.search-header input')
-	                .on('keydown.intro', null)
-	                .on('keyup.intro', null);
-	            nextStep();
-	        }
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
+	    context.map().centerZoomEase(townHall, 19, msec);
+	    timeout(function () {
+	      var centerStart = context.map().center();
+	      var textId = context.lastPointerType() === 'mouse' ? 'drag' : 'drag_touch';
+	      var dragString = helpHtml('intro.navigation.map_info') + '{br}' + helpHtml('intro.navigation.' + textId);
+	      reveal('.surface', dragString);
+	      context.map().on('drawn.intro', function () {
+	        reveal('.surface', dragString, {
+	          duration: 0
+	        });
+	      });
+	      context.map().on('move.intro', function () {
+	        var centerNow = context.map().center();
 
-	    function selectedStreet() {
-	        if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
-	            return searchStreet();
+	        if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
+	          context.map().on('move.intro', null);
+	          timeout(function () {
+	            continueTo(zoomMap);
+	          }, 3000);
 	        }
+	      });
+	    }, msec + 100);
 
-	        var onClick = function() { continueTo(editorStreet); };
-	        var entity = context.entity(springStreetEndId);
-	        var box = pointBox(entity.loc, context);
-	        box.height = 500;
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        reveal(box,
-	            helpString('intro.navigation.selected_street', { name: _t('intro.graph.name.spring-street') }),
-	            { duration: 600, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	  function zoomMap() {
+	    var zoomStart = context.map().zoom();
+	    var textId = context.lastPointerType() === 'mouse' ? 'zoom' : 'zoom_touch';
+	    var zoomString = helpHtml('intro.navigation.' + textId);
+	    reveal('.surface', zoomString);
+	    context.map().on('drawn.intro', function () {
+	      reveal('.surface', zoomString, {
+	        duration: 0
+	      });
+	    });
+	    context.map().on('move.intro', function () {
+	      if (context.map().zoom() !== zoomStart) {
+	        context.map().on('move.intro', null);
+	        timeout(function () {
+	          continueTo(features);
+	        }, 3000);
+	      }
+	    });
 
-	        timeout(function() {
-	            context.map().on('move.intro drawn.intro', function() {
-	                var entity = context.hasEntity(springStreetEndId);
-	                if (!entity) { return; }
-	                var box = pointBox(entity.loc, context);
-	                box.height = 500;
-	                reveal(box,
-	                    helpString('intro.navigation.selected_street', { name: _t('intro.graph.name.spring-street') }),
-	                    { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	                );
-	            });
-	        }, 600);  // after reveal.
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.on('enter.intro', function(mode) {
-	            if (!context.hasEntity(springStreetId)) {
-	                return continueTo(searchStreet);
-	            }
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== springStreetId) {
-	                // keep Spring Street selected..
-	                context.enter(modeSelect(context, [springStreetId]));
-	            }
-	        });
+	  function features() {
+	    var onClick = function onClick() {
+	      continueTo(pointsLinesAreas);
+	    };
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
-	                timeout(function() {
-	                    continueTo(searchStreet);
-	                }, 300);  // after any transition (e.g. if user deleted intersection)
-	            }
-	        });
+	    reveal('.surface', helpHtml('intro.navigation.features'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.map().on('drawn.intro', function () {
+	      reveal('.surface', helpHtml('intro.navigation.features'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: onClick
+	      });
+	    });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function pointsLinesAreas() {
+	    var onClick = function onClick() {
+	      continueTo(nodesWays);
+	    };
 
-	    function editorStreet() {
-	        var selector = '.entity-editor-pane button.close svg use';
-	        var href = select(selector).attr('href') || '#iD-icon-close';
+	    reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.map().on('drawn.intro', function () {
+	      reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: onClick
+	      });
+	    });
 
-	        reveal('.entity-editor-pane', helpString('intro.navigation.street_different_fields') + '{br}' +
-	            helpString('intro.navigation.editor_street', {
-	                button: icon(href, 'pre-text'),
-	                field1: onewayField.label(),
-	                field2: maxspeedField.label()
-	            }));
+	    function continueTo(nextStep) {
+	      context.map().on('drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.on('exit.intro', function() {
-	            continueTo(play);
-	        });
+	  function nodesWays() {
+	    var onClick = function onClick() {
+	      continueTo(clickTownHall);
+	    };
 
-	        context.history().on('change.intro', function() {
-	            // update the close icon in the tooltip if the user edits something.
-	            var selector = '.entity-editor-pane button.close svg use';
-	            var href = select(selector).attr('href') || '#iD-icon-close';
-
-	            reveal('.entity-editor-pane', helpString('intro.navigation.street_different_fields') + '{br}' +
-	                helpString('intro.navigation.editor_street', {
-	                    button: icon(href, 'pre-text'),
-	                    field1: onewayField.label(),
-	                    field2: maxspeedField.label()
-	                }), { duration: 0 }
-	            );
-	        });
+	    reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.map().on('drawn.intro', function () {
+	      reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: onClick
+	      });
+	    });
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('drawn.intro', null);
+	      nextStep();
 	    }
+	  }
+
+	  function clickTownHall() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var entity = context.hasEntity(hallId);
+	    if (!entity) return;
+	    reveal(null, null, {
+	      duration: 0
+	    });
+	    context.map().centerZoomEase(entity.loc, 19, 500);
+	    timeout(function () {
+	      var entity = context.hasEntity(hallId);
+	      if (!entity) return;
+	      var box = pointBox(entity.loc, context);
+	      var textId = context.lastPointerType() === 'mouse' ? 'click_townhall' : 'tap_townhall';
+	      reveal(box, helpHtml('intro.navigation.' + textId));
+	      context.map().on('move.intro drawn.intro', function () {
+	        var entity = context.hasEntity(hallId);
+	        if (!entity) return;
+	        var box = pointBox(entity.loc, context);
+	        reveal(box, helpHtml('intro.navigation.' + textId), {
+	          duration: 0
+	        });
+	      });
+	      context.on('enter.intro', function () {
+	        if (isTownHallSelected()) continueTo(selectedTownHall);
+	      });
+	    }, 550); // after centerZoomEase
 
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
 
-	    function play() {
-	        dispatch$1.call('done');
-	        reveal('.ideditor',
-	            helpString('intro.navigation.play', { next: _t('intro.points.title') }), {
-	                tooltipBox: '.intro-nav-wrap .chapter-point',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { reveal('.ideditor'); }
-	            }
-	        );
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function selectedTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall();
+	    var entity = context.hasEntity(hallId);
+	    if (!entity) return clickTownHall();
+	    var box = pointBox(entity.loc, context);
 
-	    chapter.enter = function() {
-	        dragMap();
+	    var onClick = function onClick() {
+	      continueTo(editorTownHall);
 	    };
 
+	    reveal(box, helpHtml('intro.navigation.selected_townhall'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      var entity = context.hasEntity(hallId);
+	      if (!entity) return;
+	      var box = pointBox(entity.loc, context);
+	      reveal(box, helpHtml('intro.navigation.selected_townhall'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: onClick
+	      });
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
 
-	    chapter.exit = function() {
-	        timeouts.forEach(window.clearTimeout);
-	        context.on('enter.intro exit.intro', null);
-	        context.map().on('move.intro drawn.intro', null);
-	        context.history().on('change.intro', null);
-	        context.container().select('.inspector-wrap').on('wheel.intro', null);
-	        context.container().select('.search-header input').on('keydown.intro keyup.intro', null);
-	    };
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
+	  function editorTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall(); // disallow scrolling
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+
+	    var onClick = function onClick() {
+	      continueTo(presetTownHall);
 	    };
 
+	    reveal('.entity-editor-pane', helpHtml('intro.navigation.editor_townhall'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.on('exit.intro', function () {
+	      continueTo(clickTownHall);
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	function uiIntroPoint(context, reveal) {
-	    var dispatch$1 = dispatch('done');
-	    var timeouts = [];
-	    var intersection = [-85.63279, 41.94394];
-	    var building = [-85.632422, 41.944045];
-	    var cafePreset = _mainPresetIndex.item('amenity/cafe');
-	    var _pointID = null;
+	  function presetTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
 
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
 
-	    var chapter = {
-	        title: 'intro.points.title'
-	    };
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel); // preset match, in case the user happened to change it.
 
+	    var entity = context.entity(context.selectedIDs()[0]);
+	    var preset = _mainPresetIndex.match(entity, context.graph());
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
-	    }
+	    var onClick = function onClick() {
+	      continueTo(fieldsTownHall);
+	    };
 
+	    reveal('.entity-editor-pane .section-feature-type', helpHtml('intro.navigation.preset_townhall', {
+	      preset: preset.name()
+	    }), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.on('exit.intro', function () {
+	      continueTo(clickTownHall);
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function fieldsTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
 
-	    function addPoint() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
-
-	        var msec = transitionTime(intersection, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(intersection, 19, msec);
-
-	        timeout(function() {
-	            var tooltip = reveal('button.add-point',
-	                helpString('intro.points.points_info') + '{br}' + helpString('intro.points.add_point'));
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
 
-	            _pointID = null;
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	            tooltip.selectAll('.popover-inner')
-	                .insert('svg', 'span')
-	                .attr('class', 'tooltip-illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-graphic-points');
+	    var onClick = function onClick() {
+	      continueTo(closeTownHall);
+	    };
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-point') { return; }
-	                continueTo(placePoint);
-	            });
-	        }, msec + 100);
+	    reveal('.entity-editor-pane .section-preset-fields', helpHtml('intro.navigation.fields_townhall'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.on('exit.intro', function () {
+	      continueTo(clickTownHall);
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function closeTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall();
+	    var selector = '.entity-editor-pane button.close svg use';
+	    var href = select(selector).attr('href') || '#iD-icon-close';
+	    reveal('.entity-editor-pane', helpHtml('intro.navigation.close_townhall', {
+	      button: {
+	        html: icon(href, 'inline')
+	      }
+	    }));
+	    context.on('exit.intro', function () {
+	      continueTo(searchStreet);
+	    });
+	    context.history().on('change.intro', function () {
+	      // update the close icon in the tooltip if the user edits something.
+	      var selector = '.entity-editor-pane button.close svg use';
+	      var href = select(selector).attr('href') || '#iD-icon-close';
+	      reveal('.entity-editor-pane', helpHtml('intro.navigation.close_townhall', {
+	        button: {
+	          html: icon(href, 'inline')
+	        }
+	      }), {
+	        duration: 0
+	      });
+	    });
 
-	    function placePoint() {
-	        if (context.mode().id !== 'add-point') {
-	            return chapter.restart();
-	        }
-
-	        var pointBox = pad(building, 150, context);
-	        var textId = context.lastPointerType() === 'mouse' ? 'place_point' : 'place_point_touch';
-	        reveal(pointBox, helpString('intro.points.' + textId));
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            pointBox = pad(building, 150, context);
-	            reveal(pointBox, helpString('intro.points.' + textId), { duration: 0 });
-	        });
+	  function searchStreet() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial'); // ensure spring street exists
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') { return chapter.restart(); }
-	            _pointID = context.mode().selectedIDs()[0];
-	            continueTo(searchPreset);
-	        });
+	    var msec = transitionTime(springStreet, context.map().center());
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
+	    context.map().centerZoomEase(springStreet, 19, msec); // ..and user can see it
 
-	    function searchPreset() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return addPoint();
-	        }
-
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-
-	        context.container().select('.preset-search-input')
-	            .on('keydown.intro', null)
-	            .on('keyup.intro', checkPresetSearch);
+	    timeout(function () {
+	      reveal('.search-header input', helpHtml('intro.navigation.search_street', {
+	        name: _t('intro.graph.name.spring-street')
+	      }));
+	      context.container().select('.search-header input').on('keyup.intro', checkSearchResult);
+	    }, msec + 100);
+	  }
 
-	        reveal('.preset-search-input',
-	            helpString('intro.points.search_cafe', { preset: cafePreset.name() })
-	        );
+	  function checkSearchResult() {
+	    var first = context.container().select('.feature-list-item:nth-child(0n+2)'); // skip "No Results" item
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_pointID || !context.hasEntity(_pointID)) {
-	                return continueTo(addPoint);
-	            }
+	    var firstName = first.select('.entity-name');
+	    var name = _t('intro.graph.name.spring-street');
 
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
-	                // keep the user's point selected..
-	                context.enter(modeSelect(context, [_pointID]));
+	    if (!firstName.empty() && firstName.html() === name) {
+	      reveal(first.node(), helpHtml('intro.navigation.choose_street', {
+	        name: name
+	      }), {
+	        duration: 300
+	      });
+	      context.on('exit.intro', function () {
+	        continueTo(selectedStreet);
+	      });
+	      context.container().select('.search-header input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+	    }
 
-	                // disallow scrolling
-	                context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.container().select('.search-header input').on('keydown.intro', null).on('keyup.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', null)
-	                    .on('keyup.intro', checkPresetSearch);
+	  function selectedStreet() {
+	    if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
+	      return searchStreet();
+	    }
 
-	                reveal('.preset-search-input',
-	                    helpString('intro.points.search_cafe', { preset: cafePreset.name() })
-	                );
+	    var onClick = function onClick() {
+	      continueTo(editorStreet);
+	    };
 
-	                context.history().on('change.intro', null);
-	            }
+	    var entity = context.entity(springStreetEndId);
+	    var box = pointBox(entity.loc, context);
+	    box.height = 500;
+	    reveal(box, helpHtml('intro.navigation.selected_street', {
+	      name: _t('intro.graph.name.spring-street')
+	    }), {
+	      duration: 600,
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    timeout(function () {
+	      context.map().on('move.intro drawn.intro', function () {
+	        var entity = context.hasEntity(springStreetEndId);
+	        if (!entity) return;
+	        var box = pointBox(entity.loc, context);
+	        box.height = 500;
+	        reveal(box, helpHtml('intro.navigation.selected_street', {
+	          name: _t('intro.graph.name.spring-street')
+	        }), {
+	          duration: 0,
+	          buttonText: _t.html('intro.ok'),
+	          buttonCallback: onClick
 	        });
+	      });
+	    }, 600); // after reveal.
 
+	    context.on('enter.intro', function (mode) {
+	      if (!context.hasEntity(springStreetId)) {
+	        return continueTo(searchStreet);
+	      }
 
-	        function checkPresetSearch() {
-	            var first = context.container().select('.preset-list-item:first-child');
-
-	            if (first.classed('preset-amenity-cafe')) {
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', eventCancel, true)
-	                    .on('keyup.intro', null);
-
-	                reveal(first.select('.preset-list-button').node(),
-	                    helpString('intro.points.choose_cafe', { preset: cafePreset.name() }),
-	                    { duration: 300 }
-	                );
+	      var ids = context.selectedIDs();
 
-	                context.history().on('change.intro', function() {
-	                    continueTo(aboutFeatureEditor);
-	                });
-	            }
-	        }
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== springStreetId) {
+	        // keep Spring Street selected..
+	        context.enter(modeSelect(context, [springStreetId]));
+	      }
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
+	        timeout(function () {
+	          continueTo(searchStreet);
+	        }, 300); // after any transition (e.g. if user deleted intersection)
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
-
-	    function aboutFeatureEditor() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return addPoint();
+	  function editorStreet() {
+	    var selector = '.entity-editor-pane button.close svg use';
+	    var href = select(selector).attr('href') || '#iD-icon-close';
+	    reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
+	      button: {
+	        html: icon(href, 'inline')
+	      },
+	      field1: {
+	        html: onewayField.label()
+	      },
+	      field2: {
+	        html: maxspeedField.label()
+	      }
+	    }));
+	    context.on('exit.intro', function () {
+	      continueTo(play);
+	    });
+	    context.history().on('change.intro', function () {
+	      // update the close icon in the tooltip if the user edits something.
+	      var selector = '.entity-editor-pane button.close svg use';
+	      var href = select(selector).attr('href') || '#iD-icon-close';
+	      reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
+	        button: {
+	          html: icon(href, 'inline')
+	        },
+	        field1: {
+	          html: onewayField.label()
+	        },
+	        field2: {
+	          html: maxspeedField.label()
 	        }
+	      }), {
+	        duration: 0
+	      });
+	    });
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane', helpString('intro.points.feature_editor'), {
-	                tooltipClass: 'intro-points-describe',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { continueTo(addName); }
-	            });
-	        }, 400);
-
-	        context.on('exit.intro', function() {
-	            // if user leaves select mode here, just continue with the tutorial.
-	            continueTo(reselectPoint);
-	        });
-
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function play() {
+	    dispatch.call('done');
+	    reveal('.ideditor', helpHtml('intro.navigation.play', {
+	      next: _t('intro.points.title')
+	    }), {
+	      tooltipBox: '.intro-nav-wrap .chapter-point',
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        reveal('.ideditor');
+	      }
+	    });
+	  }
 
-	    function addName() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return addPoint();
-	        }
+	  chapter.enter = function () {
+	    dragMap();
+	  };
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	  chapter.exit = function () {
+	    timeouts.forEach(window.clearTimeout);
+	    context.on('enter.intro exit.intro', null);
+	    context.map().on('move.intro drawn.intro', null);
+	    context.history().on('change.intro', null);
+	    context.container().select('.inspector-wrap').on('wheel.intro', null);
+	    context.container().select('.search-header input').on('keydown.intro keyup.intro', null);
+	  };
 
-	        var addNameString = helpString('intro.points.fields_info') + '{br}' + helpString('intro.points.add_name');
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	        timeout(function() {
-	            // It's possible for the user to add a name in a previous step..
-	            // If so, don't tell them to add the name in this step.
-	            // Give them an OK button instead.
-	            var entity = context.entity(_pointID);
-	            if (entity.tags.name) {
-	                var tooltip = reveal('.entity-editor-pane', addNameString, {
-	                    tooltipClass: 'intro-points-describe',
-	                    buttonText: _t('intro.ok'),
-	                    buttonCallback: function() { continueTo(addCloseEditor); }
-	                });
-	                tooltip.select('.instruction').style('display', 'none');
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
-	            } else {
-	                reveal('.entity-editor-pane', addNameString,
-	                    { tooltipClass: 'intro-points-describe' }
-	                );
-	            }
-	        }, 400);
+	function uiIntroPoint(context, reveal) {
+	  var dispatch = dispatch$8('done');
+	  var timeouts = [];
+	  var intersection = [-85.63279, 41.94394];
+	  var building = [-85.632422, 41.944045];
+	  var cafePreset = _mainPresetIndex.item('amenity/cafe');
+	  var _pointID = null;
+	  var chapter = {
+	    title: 'intro.points.title'
+	  };
 
-	        context.history().on('change.intro', function() {
-	            continueTo(addCloseEditor);
-	        });
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
-	        context.on('exit.intro', function() {
-	            // if user leaves select mode here, just continue with the tutorial.
-	            continueTo(reselectPoint);
-	        });
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	  function addPoint() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var msec = transitionTime(intersection, context.map().center());
 
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	    function addCloseEditor() {
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    context.map().centerZoomEase(intersection, 19, msec);
+	    timeout(function () {
+	      var tooltip = reveal('button.add-point', helpHtml('intro.points.points_info') + '{br}' + helpHtml('intro.points.add_point'));
+	      _pointID = null;
+	      tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-points');
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'add-point') return;
+	        continueTo(placePoint);
+	      });
+	    }, msec + 100);
 
-	        var selector = '.entity-editor-pane button.close svg use';
-	        var href = select(selector).attr('href') || '#iD-icon-close';
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.on('exit.intro', function() {
-	            continueTo(reselectPoint);
-	        });
+	  function placePoint() {
+	    if (context.mode().id !== 'add-point') {
+	      return chapter.restart();
+	    }
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.points.add_close', { button: icon(href, 'pre-text') })
-	        );
+	    var pointBox = pad(building, 150, context);
+	    var textId = context.lastPointerType() === 'mouse' ? 'place_point' : 'place_point_touch';
+	    reveal(pointBox, helpHtml('intro.points.' + textId));
+	    context.map().on('move.intro drawn.intro', function () {
+	      pointBox = pad(building, 150, context);
+	      reveal(pointBox, helpHtml('intro.points.' + textId), {
+	        duration: 0
+	      });
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') return chapter.restart();
+	      _pointID = context.mode().selectedIDs()[0];
+	      continueTo(searchPreset);
+	    });
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function searchPreset() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return addPoint();
+	    } // disallow scrolling
 
-	    function reselectPoint() {
-	        if (!_pointID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_pointID);
-	        if (!entity) { return chapter.restart(); }
 
-	        // make sure it's still a cafe, in case user somehow changed it..
-	        var oldPreset = _mainPresetIndex.match(entity, context.graph());
-	        context.replace(actionChangePreset(_pointID, oldPreset, cafePreset));
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	    reveal('.preset-search-input', helpHtml('intro.points.search_cafe', {
+	      preset: cafePreset.name()
+	    }));
+	    context.on('enter.intro', function (mode) {
+	      if (!_pointID || !context.hasEntity(_pointID)) {
+	        return continueTo(addPoint);
+	      }
 
-	        context.enter(modeBrowse(context));
+	      var ids = context.selectedIDs();
 
-	        var msec = transitionTime(entity.loc, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerEase(entity.loc, msec);
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
+	        // keep the user's point selected..
+	        context.enter(modeSelect(context, [_pointID])); // disallow scrolling
 
-	        timeout(function() {
-	            var box = pointBox(entity.loc, context);
-	            reveal(box, helpString('intro.points.reselect'), { duration: 600 });
+	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	        context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	        reveal('.preset-search-input', helpHtml('intro.points.search_cafe', {
+	          preset: cafePreset.name()
+	        }));
+	        context.history().on('change.intro', null);
+	      }
+	    });
 
-	            timeout(function() {
-	                context.map().on('move.intro drawn.intro', function() {
-	                    var entity = context.hasEntity(_pointID);
-	                    if (!entity) { return chapter.restart(); }
-	                    var box = pointBox(entity.loc, context);
-	                    reveal(box, helpString('intro.points.reselect'), { duration: 0 });
-	                });
-	            }, 600); // after reveal..
+	    function checkPresetSearch() {
+	      var first = context.container().select('.preset-list-item:first-child');
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'select') { return; }
-	                continueTo(updatePoint);
-	            });
+	      if (first.classed('preset-amenity-cafe')) {
+	        context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+	        reveal(first.select('.preset-list-button').node(), helpHtml('intro.points.choose_cafe', {
+	          preset: cafePreset.name()
+	        }), {
+	          duration: 300
+	        });
+	        context.history().on('change.intro', function () {
+	          continueTo(aboutFeatureEditor);
+	        });
+	      }
+	    }
+
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        }, msec + 100);
+	  function aboutFeatureEditor() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return addPoint();
+	    }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.points.feature_editor'), {
+	        tooltipClass: 'intro-points-describe',
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: function buttonCallback() {
+	          continueTo(addName);
 	        }
+	      });
+	    }, 400);
+	    context.on('exit.intro', function () {
+	      // if user leaves select mode here, just continue with the tutorial.
+	      continueTo(reselectPoint);
+	    });
+
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function addName() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return addPoint();
+	    } // reset pane, in case user happened to change it..
 
-	    function updatePoint() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return continueTo(reselectPoint);
-	        }
 
-	        // reset pane, in case user happened to untag the point..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    var addNameString = helpHtml('intro.points.fields_info') + '{br}' + helpHtml('intro.points.add_name');
+	    timeout(function () {
+	      // It's possible for the user to add a name in a previous step..
+	      // If so, don't tell them to add the name in this step.
+	      // Give them an OK button instead.
+	      var entity = context.entity(_pointID);
 
-	        context.on('exit.intro', function() {
-	            continueTo(reselectPoint);
+	      if (entity.tags.name) {
+	        var tooltip = reveal('.entity-editor-pane', addNameString, {
+	          tooltipClass: 'intro-points-describe',
+	          buttonText: _t.html('intro.ok'),
+	          buttonCallback: function buttonCallback() {
+	            continueTo(addCloseEditor);
+	          }
 	        });
-
-	        context.history().on('change.intro', function() {
-	            continueTo(updateCloseEditor);
+	        tooltip.select('.instruction').style('display', 'none');
+	      } else {
+	        reveal('.entity-editor-pane', addNameString, {
+	          tooltipClass: 'intro-points-describe'
 	        });
+	      }
+	    }, 400);
+	    context.history().on('change.intro', function () {
+	      continueTo(addCloseEditor);
+	    });
+	    context.on('exit.intro', function () {
+	      // if user leaves select mode here, just continue with the tutorial.
+	      continueTo(reselectPoint);
+	    });
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane', helpString('intro.points.update'),
-	                { tooltipClass: 'intro-points-describe' }
-	            );
-	        }, 400);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	  function addCloseEditor() {
+	    // reset pane, in case user happened to change it..
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    var selector = '.entity-editor-pane button.close svg use';
+	    var href = select(selector).attr('href') || '#iD-icon-close';
+	    context.on('exit.intro', function () {
+	      continueTo(reselectPoint);
+	    });
+	    reveal('.entity-editor-pane', helpHtml('intro.points.add_close', {
+	      button: {
+	        html: icon(href, 'inline')
+	      }
+	    }));
+
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function reselectPoint() {
+	    if (!_pointID) return chapter.restart();
+	    var entity = context.hasEntity(_pointID);
+	    if (!entity) return chapter.restart(); // make sure it's still a cafe, in case user somehow changed it..
 
-	    function updateCloseEditor() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return continueTo(reselectPoint);
-	        }
+	    var oldPreset = _mainPresetIndex.match(entity, context.graph());
+	    context.replace(actionChangePreset(_pointID, oldPreset, cafePreset));
+	    context.enter(modeBrowse(context));
+	    var msec = transitionTime(entity.loc, context.map().center());
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	        context.on('exit.intro', function() {
-	            continueTo(rightClickPoint);
+	    context.map().centerEase(entity.loc, msec);
+	    timeout(function () {
+	      var box = pointBox(entity.loc, context);
+	      reveal(box, helpHtml('intro.points.reselect'), {
+	        duration: 600
+	      });
+	      timeout(function () {
+	        context.map().on('move.intro drawn.intro', function () {
+	          var entity = context.hasEntity(_pointID);
+	          if (!entity) return chapter.restart();
+	          var box = pointBox(entity.loc, context);
+	          reveal(box, helpHtml('intro.points.reselect'), {
+	            duration: 0
+	          });
 	        });
+	      }, 600); // after reveal..
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane',
-	                helpString('intro.points.update_close', { button: icon('#iD-icon-close', 'pre-text') })
-	            );
-	        }, 500);
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'select') return;
+	        continueTo(updatePoint);
+	      });
+	    }, msec + 100);
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function updatePoint() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return continueTo(reselectPoint);
+	    } // reset pane, in case user happened to untag the point..
 
-	    function rightClickPoint() {
-	        if (!_pointID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_pointID);
-	        if (!entity) { return chapter.restart(); }
-
-	        context.enter(modeBrowse(context));
 
-	        var box = pointBox(entity.loc, context);
-	        var textId = context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch';
-	        reveal(box, helpString('intro.points.' + textId), { duration: 600 });
-
-	        timeout(function() {
-	            context.map().on('move.intro', function() {
-	                var entity = context.hasEntity(_pointID);
-	                if (!entity) { return chapter.restart(); }
-	                var box = pointBox(entity.loc, context);
-	                reveal(box, helpString('intro.points.' + textId), { duration: 0 });
-	            });
-	        }, 600); // after reveal
-
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') { return; }
-	            var ids = context.selectedIDs();
-	            if (ids.length !== 1 || ids[0] !== _pointID) { return; }
-
-	            timeout(function() {
-	                var node = selectMenuItem(context, 'delete').node();
-	                if (!node) { return; }
-	                continueTo(enterDelete);
-	            }, 50);  // after menu visible
-	        });
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    context.on('exit.intro', function () {
+	      continueTo(reselectPoint);
+	    });
+	    context.history().on('change.intro', function () {
+	      continueTo(updateCloseEditor);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.points.update'), {
+	        tooltipClass: 'intro-points-describe'
+	      });
+	    }, 400);
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function updateCloseEditor() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return continueTo(reselectPoint);
+	    } // reset pane, in case user happened to change it..
 
-	    function enterDelete() {
-	        if (!_pointID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_pointID);
-	        if (!entity) { return chapter.restart(); }
-
-	        var node = selectMenuItem(context, 'delete').node();
-	        if (!node) { return continueTo(rightClickPoint); }
 
-	        reveal('.edit-menu',
-	            helpString('intro.points.delete'),
-	            { padding: 50 }
-	        );
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    context.on('exit.intro', function () {
+	      continueTo(rightClickPoint);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.points.update_close', {
+	        button: {
+	          html: icon('#iD-icon-close', 'inline')
+	        }
+	      }));
+	    }, 500);
 
-	        timeout(function() {
-	            context.map().on('move.intro', function() {
-	                reveal('.edit-menu',
-	                    helpString('intro.points.delete'),
-	                    { duration: 0,  padding: 50 }
-	                );
-	            });
-	        }, 300); // after menu visible
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.on('exit.intro', function() {
-	            if (!_pointID) { return chapter.restart(); }
-	            var entity = context.hasEntity(_pointID);
-	            if (entity) { return continueTo(rightClickPoint); }  // point still exists
+	  function rightClickPoint() {
+	    if (!_pointID) return chapter.restart();
+	    var entity = context.hasEntity(_pointID);
+	    if (!entity) return chapter.restart();
+	    context.enter(modeBrowse(context));
+	    var box = pointBox(entity.loc, context);
+	    var textId = context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch';
+	    reveal(box, helpHtml('intro.points.' + textId), {
+	      duration: 600
+	    });
+	    timeout(function () {
+	      context.map().on('move.intro', function () {
+	        var entity = context.hasEntity(_pointID);
+	        if (!entity) return chapter.restart();
+	        var box = pointBox(entity.loc, context);
+	        reveal(box, helpHtml('intro.points.' + textId), {
+	          duration: 0
 	        });
+	      });
+	    }, 600); // after reveal
 
-	        context.history().on('change.intro', function(changed) {
-	            if (changed.deleted().length) {
-	                continueTo(undo);
-	            }
-	        });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') return;
+	      var ids = context.selectedIDs();
+	      if (ids.length !== 1 || ids[0] !== _pointID) return;
+	      timeout(function () {
+	        var node = selectMenuItem(context, 'delete').node();
+	        if (!node) return;
+	        continueTo(enterDelete);
+	      }, 50); // after menu visible
+	    });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function enterDelete() {
+	    if (!_pointID) return chapter.restart();
+	    var entity = context.hasEntity(_pointID);
+	    if (!entity) return chapter.restart();
+	    var node = selectMenuItem(context, 'delete').node();
 
-	    function undo() {
-	        context.history().on('change.intro', function() {
-	            continueTo(play);
+	    if (!node) {
+	      return continueTo(rightClickPoint);
+	    }
+
+	    reveal('.edit-menu', helpHtml('intro.points.delete'), {
+	      padding: 50
+	    });
+	    timeout(function () {
+	      context.map().on('move.intro', function () {
+	        reveal('.edit-menu', helpHtml('intro.points.delete'), {
+	          duration: 0,
+	          padding: 50
 	        });
+	      });
+	    }, 300); // after menu visible
 
-	        reveal('.top-toolbar button.undo-button',
-	            helpString('intro.points.undo')
-	        );
+	    context.on('exit.intro', function () {
+	      if (!_pointID) return chapter.restart();
+	      var entity = context.hasEntity(_pointID);
+	      if (entity) return continueTo(rightClickPoint); // point still exists
+	    });
+	    context.history().on('change.intro', function (changed) {
+	      if (changed.deleted().length) {
+	        continueTo(undo);
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function undo() {
+	    context.history().on('change.intro', function () {
+	      continueTo(play);
+	    });
+	    reveal('.top-toolbar button.undo-button', helpHtml('intro.points.undo'));
 
-	    function play() {
-	        dispatch$1.call('done');
-	        reveal('.ideditor',
-	            helpString('intro.points.play', { next: _t('intro.areas.title') }), {
-	                tooltipBox: '.intro-nav-wrap .chapter-area',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { reveal('.ideditor'); }
-	            }
-	        );
+	    function continueTo(nextStep) {
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function play() {
+	    dispatch.call('done');
+	    reveal('.ideditor', helpHtml('intro.points.play', {
+	      next: _t('intro.areas.title')
+	    }), {
+	      tooltipBox: '.intro-nav-wrap .chapter-area',
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        reveal('.ideditor');
+	      }
+	    });
+	  }
 
-	    chapter.enter = function() {
-	        addPoint();
-	    };
+	  chapter.enter = function () {
+	    addPoint();
+	  };
 
+	  chapter.exit = function () {
+	    timeouts.forEach(window.clearTimeout);
+	    context.on('enter.intro exit.intro', null);
+	    context.map().on('move.intro drawn.intro', null);
+	    context.history().on('change.intro', null);
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	  };
 
-	    chapter.exit = function() {
-	        timeouts.forEach(window.clearTimeout);
-	        context.on('enter.intro exit.intro', null);
-	        context.map().on('move.intro drawn.intro', null);
-	        context.history().on('change.intro', null);
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-	        context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	    };
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	function uiIntroArea(context, reveal) {
+	  var dispatch = dispatch$8('done');
+	  var playground = [-85.63552, 41.94159];
+	  var playgroundPreset = _mainPresetIndex.item('leisure/playground');
+	  var nameField = _mainPresetIndex.field('name');
+	  var descriptionField = _mainPresetIndex.field('description');
+	  var timeouts = [];
 
+	  var _areaID;
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	  var chapter = {
+	    title: 'intro.areas.title'
+	  };
 
-	function uiIntroArea(context, reveal) {
-	    var dispatch$1 = dispatch('done');
-	    var playground = [-85.63552, 41.94159];
-	    var playgroundPreset = _mainPresetIndex.item('leisure/playground');
-	    var nameField = _mainPresetIndex.field('name');
-	    var descriptionField = _mainPresetIndex.field('description');
-	    var timeouts = [];
-	    var _areaID;
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	    var chapter = {
-	        title: 'intro.areas.title'
-	    };
+	  function revealPlayground(center, text, options) {
+	    var padding = 180 * Math.pow(2, context.map().zoom() - 19.5);
+	    var box = pad(center, padding, context);
+	    reveal(box, text, options);
+	  }
 
+	  function addArea() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    _areaID = null;
+	    var msec = transitionTime(playground, context.map().center());
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
+	    context.map().centerZoomEase(playground, 19, msec);
+	    timeout(function () {
+	      var tooltip = reveal('button.add-area', helpHtml('intro.areas.add_playground'));
+	      tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-areas');
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'add-area') return;
+	        continueTo(startPlayground);
+	      });
+	    }, msec + 100);
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
-
-	    function revealPlayground(center, text, options) {
-	        var padding = 180 * Math.pow(2, context.map().zoom() - 19.5);
-	        var box = pad(center, padding, context);
-	        reveal(box, text, options);
+	  function startPlayground() {
+	    if (context.mode().id !== 'add-area') {
+	      return chapter.restart();
 	    }
 
+	    _areaID = null;
+	    context.map().zoomEase(19.5, 500);
+	    timeout(function () {
+	      var textId = context.lastPointerType() === 'mouse' ? 'starting_node_click' : 'starting_node_tap';
+	      var startDrawString = helpHtml('intro.areas.start_playground') + helpHtml('intro.areas.' + textId);
+	      revealPlayground(playground, startDrawString, {
+	        duration: 250
+	      });
+	      timeout(function () {
+	        context.map().on('move.intro drawn.intro', function () {
+	          revealPlayground(playground, startDrawString, {
+	            duration: 0
+	          });
+	        });
+	        context.on('enter.intro', function (mode) {
+	          if (mode.id !== 'draw-area') return chapter.restart();
+	          continueTo(continuePlayground);
+	        });
+	      }, 250); // after reveal
+	    }, 550); // after easing
 
-	    function addArea() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
-	        _areaID = null;
-
-	        var msec = transitionTime(playground, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(playground, 19, msec);
-
-	        timeout(function() {
-	            var tooltip = reveal('button.add-area',
-	                helpString('intro.areas.add_playground'));
-
-	            tooltip.selectAll('.popover-inner')
-	                .insert('svg', 'span')
-	                .attr('class', 'tooltip-illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-graphic-areas');
-
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-area') { return; }
-	                continueTo(startPlayground);
-	            });
-	        }, msec + 100);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	  function continuePlayground() {
+	    if (context.mode().id !== 'draw-area') {
+	      return chapter.restart();
 	    }
 
+	    _areaID = null;
+	    revealPlayground(playground, helpHtml('intro.areas.continue_playground'), {
+	      duration: 250
+	    });
+	    timeout(function () {
+	      context.map().on('move.intro drawn.intro', function () {
+	        revealPlayground(playground, helpHtml('intro.areas.continue_playground'), {
+	          duration: 0
+	        });
+	      });
+	    }, 250); // after reveal
+
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-area') {
+	        var entity = context.hasEntity(context.selectedIDs()[0]);
 
-	    function startPlayground() {
-	        if (context.mode().id !== 'add-area') {
-	            return chapter.restart();
+	        if (entity && entity.nodes.length >= 6) {
+	          return continueTo(finishPlayground);
+	        } else {
+	          return;
 	        }
+	      } else if (mode.id === 'select') {
+	        _areaID = context.selectedIDs()[0];
+	        return continueTo(searchPresets);
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
 
-	        _areaID = null;
-	        context.map().zoomEase(19.5, 500);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        timeout(function() {
-	            var textId = context.lastPointerType() === 'mouse' ? 'starting_node_click' : 'starting_node_tap';
-	            var startDrawString = helpString('intro.areas.start_playground') + helpString('intro.areas.' + textId);
-	            revealPlayground(playground,
-	                startDrawString, { duration: 250 }
-	            );
+	  function finishPlayground() {
+	    if (context.mode().id !== 'draw-area') {
+	      return chapter.restart();
+	    }
 
-	            timeout(function() {
-	                context.map().on('move.intro drawn.intro', function() {
-	                    revealPlayground(playground,
-	                        startDrawString, { duration: 0 }
-	                    );
-	                });
-	                context.on('enter.intro', function(mode) {
-	                    if (mode.id !== 'draw-area') { return chapter.restart(); }
-	                    continueTo(continuePlayground);
-	                });
-	            }, 250);  // after reveal
+	    _areaID = null;
+	    var finishString = helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.areas.finish_playground');
+	    revealPlayground(playground, finishString, {
+	      duration: 250
+	    });
+	    timeout(function () {
+	      context.map().on('move.intro drawn.intro', function () {
+	        revealPlayground(playground, finishString, {
+	          duration: 0
+	        });
+	      });
+	    }, 250); // after reveal
 
-	        }, 550);  // after easing
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-area') {
+	        return;
+	      } else if (mode.id === 'select') {
+	        _areaID = context.selectedIDs()[0];
+	        return continueTo(searchPresets);
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function searchPresets() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	    function continuePlayground() {
-	        if (context.mode().id !== 'draw-area') {
-	            return chapter.restart();
-	        }
+	    var ids = context.selectedIDs();
 
-	        _areaID = null;
-	        revealPlayground(playground,
-	            helpString('intro.areas.continue_playground'),
-	            { duration: 250 }
-	        );
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      context.enter(modeSelect(context, [_areaID]));
+	    } // disallow scrolling
 
-	        timeout(function() {
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealPlayground(playground,
-	                    helpString('intro.areas.continue_playground'),
-	                    { duration: 0 }
-	                );
-	            });
-	        }, 250);  // after reveal
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-area') {
-	                var entity = context.hasEntity(context.selectedIDs()[0]);
-	                if (entity && entity.nodes.length >= 6) {
-	                    return continueTo(finishPlayground);
-	                } else {
-	                    return;
-	                }
-	            } else if (mode.id === 'select') {
-	                _areaID = context.selectedIDs()[0];
-	                return continueTo(searchPresets);
-	            } else {
-	                return chapter.restart();
-	            }
-	        });
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	      reveal('.preset-search-input', helpHtml('intro.areas.search_playground', {
+	        preset: playgroundPreset.name()
+	      }));
+	    }, 400); // after preset list pane visible..
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	    context.on('enter.intro', function (mode) {
+	      if (!_areaID || !context.hasEntity(_areaID)) {
+	        return continueTo(addArea);
+	      }
 
+	      var ids = context.selectedIDs();
 
-	    function finishPlayground() {
-	        if (context.mode().id !== 'draw-area') {
-	            return chapter.restart();
-	        }
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	        // keep the user's area selected..
+	        context.enter(modeSelect(context, [_areaID])); // reset pane, in case user somehow happened to change it..
 
-	        _areaID = null;
+	        context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
 
-	        var finishString = helpString('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.areas.finish_playground');
-	        revealPlayground(playground,
-	            finishString, { duration: 250 }
-	        );
+	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	        context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	        reveal('.preset-search-input', helpHtml('intro.areas.search_playground', {
+	          preset: playgroundPreset.name()
+	        }));
+	        context.history().on('change.intro', null);
+	      }
+	    });
 
-	        timeout(function() {
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealPlayground(playground,
-	                    finishString, { duration: 0 }
-	                );
-	            });
-	        }, 250);  // after reveal
+	    function checkPresetSearch() {
+	      var first = context.container().select('.preset-list-item:first-child');
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-area') {
-	                return;
-	            } else if (mode.id === 'select') {
-	                _areaID = context.selectedIDs()[0];
-	                return continueTo(searchPresets);
-	            } else {
-	                return chapter.restart();
-	            }
+	      if (first.classed('preset-leisure-playground')) {
+	        reveal(first.select('.preset-list-button').node(), helpHtml('intro.areas.choose_playground', {
+	          preset: playgroundPreset.name()
+	        }), {
+	          duration: 300
+	        });
+	        context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+	        context.history().on('change.intro', function () {
+	          continueTo(clickAddField);
 	        });
+	      }
+	    }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function clickAddField() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	    function searchPresets() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            context.enter(modeSelect(context, [_areaID]));
-	        }
+	    var ids = context.selectedIDs();
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    }
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	    if (!context.container().select('.form-field-description').empty()) {
+	      return continueTo(describePlayground);
+	    } // disallow scrolling
 
-	            context.container().select('.preset-search-input')
-	                .on('keydown.intro', null)
-	                .on('keyup.intro', checkPresetSearch);
 
-	            reveal('.preset-search-input',
-	                helpString('intro.areas.search_playground', { preset: playgroundPreset.name() })
-	            );
-	        }, 400);  // after preset list pane visible..
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // It's possible for the user to add a description in a previous step..
+	      // If they did this already, just continue to next step.
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_areaID || !context.hasEntity(_areaID)) {
-	                return continueTo(addArea);
-	            }
+	      var entity = context.entity(_areaID);
 
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	                // keep the user's area selected..
-	                context.enter(modeSelect(context, [_areaID]));
+	      if (entity.tags.description) {
+	        return continueTo(play);
+	      } // scroll "Add field" into view
 
-	                // reset pane, in case user somehow happened to change it..
-	                context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
-	                // disallow scrolling
-	                context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', null)
-	                    .on('keyup.intro', checkPresetSearch);
+	      var box = context.container().select('.more-fields').node().getBoundingClientRect();
 
-	                reveal('.preset-search-input',
-	                    helpString('intro.areas.search_playground', { preset: playgroundPreset.name() })
-	                );
+	      if (box.top > 300) {
+	        var pane = context.container().select('.entity-editor-pane .inspector-body');
+	        var start = pane.node().scrollTop;
+	        var end = start + (box.top - 300);
+	        pane.transition().duration(250).tween('scroll.inspector', function () {
+	          var node = this;
+	          var i = d3_interpolateNumber(start, end);
+	          return function (t) {
+	            node.scrollTop = i(t);
+	          };
+	        });
+	      }
 
-	                context.history().on('change.intro', null);
-	            }
+	      timeout(function () {
+	        reveal('.more-fields .combobox-input', helpHtml('intro.areas.add_field', {
+	          name: {
+	            html: nameField.label()
+	          },
+	          description: {
+	            html: descriptionField.label()
+	          }
+	        }), {
+	          duration: 300
+	        });
+	        context.container().select('.more-fields .combobox-input').on('click.intro', function () {
+	          // Watch for the combobox to appear...
+	          var watcher;
+	          watcher = window.setInterval(function () {
+	            if (!context.container().select('div.combobox').empty()) {
+	              window.clearInterval(watcher);
+	              continueTo(chooseDescriptionField);
+	            }
+	          }, 300);
 	        });
+	      }, 300); // after "Add Field" visible
+	    }, 400); // after editor pane visible
 
-	        function checkPresetSearch() {
-	            var first = context.container().select('.preset-list-item:first-child');
+	    context.on('exit.intro', function () {
+	      return continueTo(searchPresets);
+	    });
 
-	            if (first.classed('preset-leisure-playground')) {
-	                reveal(first.select('.preset-list-button').node(),
-	                    helpString('intro.areas.choose_playground', { preset: playgroundPreset.name() }),
-	                    { duration: 300 }
-	                );
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.more-fields .combobox-input').on('click.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', eventCancel, true)
-	                    .on('keyup.intro', null);
+	  function chooseDescriptionField() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	                context.history().on('change.intro', function() {
-	                    continueTo(clickAddField);
-	                });
-	            }
-	        }
+	    var ids = context.selectedIDs();
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	            nextStep();
-	        }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
 	    }
 
+	    if (!context.container().select('.form-field-description').empty()) {
+	      return continueTo(describePlayground);
+	    } // Make sure combobox is ready..
 
-	    function clickAddField() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            return searchPresets();
-	        }
 
-	        if (!context.container().select('.form-field-description').empty()) {
-	            return continueTo(describePlayground);
-	        }
+	    if (context.container().select('div.combobox').empty()) {
+	      return continueTo(clickAddField);
+	    } // Watch for the combobox to go away..
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    var watcher;
+	    watcher = window.setInterval(function () {
+	      if (context.container().select('div.combobox').empty()) {
+	        window.clearInterval(watcher);
+	        timeout(function () {
+	          if (context.container().select('.form-field-description').empty()) {
+	            continueTo(retryChooseDescription);
+	          } else {
+	            continueTo(describePlayground);
+	          }
+	        }, 300); // after description field added.
+	      }
+	    }, 300);
+	    reveal('div.combobox', helpHtml('intro.areas.choose_field', {
+	      field: {
+	        html: descriptionField.label()
+	      }
+	    }), {
+	      duration: 300
+	    });
+	    context.on('exit.intro', function () {
+	      return continueTo(searchPresets);
+	    });
 
-	            // It's possible for the user to add a description in a previous step..
-	            // If they did this already, just continue to next step.
-	            var entity = context.entity(_areaID);
-	            if (entity.tags.description) {
-	                return continueTo(play);
-	            }
+	    function continueTo(nextStep) {
+	      if (watcher) window.clearInterval(watcher);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            // scroll "Add field" into view
-	            var box = context.container().select('.more-fields').node().getBoundingClientRect();
-	            if (box.top > 300) {
-	                var pane = context.container().select('.entity-editor-pane .inspector-body');
-	                var start = pane.node().scrollTop;
-	                var end = start + (box.top - 300);
-
-	                pane
-	                    .transition()
-	                    .duration(250)
-	                    .tween('scroll.inspector', function() {
-	                        var node = this;
-	                        var i = d3_interpolateNumber(start, end);
-	                        return function(t) {
-	                            node.scrollTop = i(t);
-	                        };
-	                    });
-	            }
+	  function describePlayground() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	            timeout(function() {
-	                reveal('.more-fields .combobox-input',
-	                    helpString('intro.areas.add_field', {
-	                        name: nameField.label(),
-	                        description: descriptionField.label()
-	                    }),
-	                    { duration: 300 }
-	                );
+	    var ids = context.selectedIDs();
 
-	                context.container().select('.more-fields .combobox-input')
-	                    .on('click.intro', function() {
-	                        // Watch for the combobox to appear...
-	                        var watcher;
-	                        watcher = window.setInterval(function() {
-	                            if (!context.container().select('div.combobox').empty()) {
-	                                window.clearInterval(watcher);
-	                                continueTo(chooseDescriptionField);
-	                            }
-	                        }, 300);
-	                    });
-	            }, 300);  // after "Add Field" visible
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    } // reset pane, in case user happened to change it..
 
-	        }, 400);  // after editor pane visible
 
-	        context.on('exit.intro', function() {
-	            return continueTo(searchPresets);
-	        });
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.more-fields .combobox-input').on('click.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    if (context.container().select('.form-field-description').empty()) {
+	      return continueTo(retryChooseDescription);
 	    }
 
+	    context.on('exit.intro', function () {
+	      continueTo(play);
+	    });
+	    reveal('.entity-editor-pane', helpHtml('intro.areas.describe_playground', {
+	      button: {
+	        html: icon('#iD-icon-close', 'inline')
+	      }
+	    }), {
+	      duration: 300
+	    });
 
-	    function chooseDescriptionField() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            return searchPresets();
-	        }
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        if (!context.container().select('.form-field-description').empty()) {
-	            return continueTo(describePlayground);
-	        }
+	  function retryChooseDescription() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	        // Make sure combobox is ready..
-	        if (context.container().select('div.combobox').empty()) {
-	            return continueTo(clickAddField);
-	        }
-	        // Watch for the combobox to go away..
-	        var watcher;
-	        watcher = window.setInterval(function() {
-	            if (context.container().select('div.combobox').empty()) {
-	                window.clearInterval(watcher);
-	                timeout(function() {
-	                    if (context.container().select('.form-field-description').empty()) {
-	                        continueTo(retryChooseDescription);
-	                    } else {
-	                        continueTo(describePlayground);
-	                    }
-	                }, 300);  // after description field added.
-	            }
-	        }, 300);
+	    var ids = context.selectedIDs();
 
-	        reveal('div.combobox',
-	            helpString('intro.areas.choose_field', { field: descriptionField.label() }),
-	            { duration: 300 }
-	        );
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    } // reset pane, in case user happened to change it..
 
-	        context.on('exit.intro', function() {
-	            return continueTo(searchPresets);
-	        });
 
-	        function continueTo(nextStep) {
-	            if (watcher) { window.clearInterval(watcher); }
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    reveal('.entity-editor-pane', helpHtml('intro.areas.retry_add_field', {
+	      field: {
+	        html: descriptionField.label()
+	      }
+	    }), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(clickAddField);
+	      }
+	    });
+	    context.on('exit.intro', function () {
+	      return continueTo(searchPresets);
+	    });
+
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function play() {
+	    dispatch.call('done');
+	    reveal('.ideditor', helpHtml('intro.areas.play', {
+	      next: _t('intro.lines.title')
+	    }), {
+	      tooltipBox: '.intro-nav-wrap .chapter-line',
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        reveal('.ideditor');
+	      }
+	    });
+	  }
 
-	    function describePlayground() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            return searchPresets();
-	        }
+	  chapter.enter = function () {
+	    addArea();
+	  };
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	  chapter.exit = function () {
+	    timeouts.forEach(window.clearTimeout);
+	    context.on('enter.intro exit.intro', null);
+	    context.map().on('move.intro drawn.intro', null);
+	    context.history().on('change.intro', null);
+	    context.container().select('.inspector-wrap').on('wheel.intro', null);
+	    context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	    context.container().select('.more-fields .combobox-input').on('click.intro', null);
+	  };
 
-	        if (context.container().select('.form-field-description').empty()) {
-	            return continueTo(retryChooseDescription);
-	        }
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	        context.on('exit.intro', function() {
-	            continueTo(play);
-	        });
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.areas.describe_playground', { button: icon('#iD-icon-close', 'pre-text') }),
-	            { duration: 300 }
-	        );
+	function uiIntroLine(context, reveal) {
+	  var dispatch = dispatch$8('done');
+	  var timeouts = [];
+	  var _tulipRoadID = null;
+	  var flowerRoadID = 'w646';
+	  var tulipRoadStart = [-85.6297754121684, 41.95805253325314];
+	  var tulipRoadMidpoint = [-85.62975395449628, 41.95787501510204];
+	  var tulipRoadIntersection = [-85.62974496187628, 41.95742515554585];
+	  var roadCategory = _mainPresetIndex.item('category-road_minor');
+	  var residentialPreset = _mainPresetIndex.item('highway/residential');
+	  var woodRoadID = 'w525';
+	  var woodRoadEndID = 'n2862';
+	  var woodRoadAddNode = [-85.62390110349587, 41.95397111462291];
+	  var woodRoadDragEndpoint = [-85.623867390213, 41.95466987786487];
+	  var woodRoadDragMidpoint = [-85.62386254803509, 41.95430395953872];
+	  var washingtonStreetID = 'w522';
+	  var twelfthAvenueID = 'w1';
+	  var eleventhAvenueEndID = 'n3550';
+	  var twelfthAvenueEndID = 'n5';
+	  var _washingtonSegmentID = null;
+	  var eleventhAvenueEnd = context.entity(eleventhAvenueEndID).loc;
+	  var twelfthAvenueEnd = context.entity(twelfthAvenueEndID).loc;
+	  var deleteLinesLoc = [-85.6219395542764, 41.95228033922477];
+	  var twelfthAvenue = [-85.62219310052491, 41.952505413152956];
+	  var chapter = {
+	    title: 'intro.lines.title'
+	  };
+
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
+
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
+
+	  function addLine() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var msec = transitionTime(tulipRoadStart, context.map().center());
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
+	    context.map().centerZoomEase(tulipRoadStart, 18.5, msec);
+	    timeout(function () {
+	      var tooltip = reveal('button.add-line', helpHtml('intro.lines.add_line'));
+	      tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-lines');
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'add-line') return;
+	        continueTo(startLine);
+	      });
+	    }, msec + 100);
+
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
+
+	  function startLine() {
+	    if (context.mode().id !== 'add-line') return chapter.restart();
+	    _tulipRoadID = null;
+	    var padding = 70 * Math.pow(2, context.map().zoom() - 18);
+	    var box = pad(tulipRoadStart, padding, context);
+	    box.height = box.height + 100;
+	    var textId = context.lastPointerType() === 'mouse' ? 'start_line' : 'start_line_tap';
+	    var startLineString = helpHtml('intro.lines.missing_road') + '{br}' + helpHtml('intro.lines.line_draw_info') + helpHtml('intro.lines.' + textId);
+	    reveal(box, startLineString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      padding = 70 * Math.pow(2, context.map().zoom() - 18);
+	      box = pad(tulipRoadStart, padding, context);
+	      box.height = box.height + 100;
+	      reveal(box, startLineString, {
+	        duration: 0
+	      });
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'draw-line') return chapter.restart();
+	      continueTo(drawLine);
+	    });
 
-	    function retryChooseDescription() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            return searchPresets();
-	        }
-
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-
-	        reveal('.entity-editor-pane',
-	            helpString('intro.areas.retry_add_field', { field: descriptionField.label() }), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(clickAddField); }
-	        });
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.on('exit.intro', function() {
-	            return continueTo(searchPresets);
+	  function drawLine() {
+	    if (context.mode().id !== 'draw-line') return chapter.restart();
+	    _tulipRoadID = context.mode().selectedIDs()[0];
+	    context.map().centerEase(tulipRoadMidpoint, 500);
+	    timeout(function () {
+	      var padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
+	      var box = pad(tulipRoadMidpoint, padding, context);
+	      box.height = box.height * 2;
+	      reveal(box, helpHtml('intro.lines.intersect', {
+	        name: _t('intro.graph.name.flower-street')
+	      }));
+	      context.map().on('move.intro drawn.intro', function () {
+	        padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
+	        box = pad(tulipRoadMidpoint, padding, context);
+	        box.height = box.height * 2;
+	        reveal(box, helpHtml('intro.lines.intersect', {
+	          name: _t('intro.graph.name.flower-street')
+	        }), {
+	          duration: 0
 	        });
+	      });
+	    }, 550); // after easing..
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
-	    }
-
+	    context.history().on('change.intro', function () {
+	      if (isLineConnected()) {
+	        continueTo(continueLine);
+	      }
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-line') {
+	        return;
+	      } else if (mode.id === 'select') {
+	        continueTo(retryIntersect);
+	        return;
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
 
-	    function play() {
-	        dispatch$1.call('done');
-	        reveal('.ideditor',
-	            helpString('intro.areas.play', { next: _t('intro.lines.title') }), {
-	                tooltipBox: '.intro-nav-wrap .chapter-line',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { reveal('.ideditor'); }
-	            }
-	        );
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function isLineConnected() {
+	    var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
 
-	    chapter.enter = function() {
-	        addArea();
-	    };
-
-
-	    chapter.exit = function() {
-	        timeouts.forEach(window.clearTimeout);
-	        context.on('enter.intro exit.intro', null);
-	        context.map().on('move.intro drawn.intro', null);
-	        context.history().on('change.intro', null);
-	        context.container().select('.inspector-wrap').on('wheel.intro', null);
-	        context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	        context.container().select('.more-fields .combobox-input').on('click.intro', null);
-	    };
+	    if (!entity) return false;
+	    var drawNodes = context.graph().childNodes(entity);
+	    return drawNodes.some(function (node) {
+	      return context.graph().parentWays(node).some(function (parent) {
+	        return parent.id === flowerRoadID;
+	      });
+	    });
+	  }
 
+	  function retryIntersect() {
+	    select(window).on('pointerdown.intro mousedown.intro', eventCancel, true);
+	    var box = pad(tulipRoadIntersection, 80, context);
+	    reveal(box, helpHtml('intro.lines.retry_intersect', {
+	      name: _t('intro.graph.name.flower-street')
+	    }));
+	    timeout(chapter.restart, 3000);
+	  }
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	  function continueLine() {
+	    if (context.mode().id !== 'draw-line') return chapter.restart();
 
+	    var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	    if (!entity) return chapter.restart();
+	    context.map().centerEase(tulipRoadIntersection, 500);
+	    var continueLineText = helpHtml('intro.lines.continue_line') + '{br}' + helpHtml('intro.lines.finish_line_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.lines.finish_road');
+	    reveal('.surface', continueLineText);
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-line') {
+	        return;
+	      } else if (mode.id === 'select') {
+	        return continueTo(chooseCategoryRoad);
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
 
-	function uiIntroLine(context, reveal) {
-	    var dispatch$1 = dispatch('done');
-	    var timeouts = [];
-	    var _tulipRoadID = null;
-	    var flowerRoadID = 'w646';
-	    var tulipRoadStart = [-85.6297754121684, 41.95805253325314];
-	    var tulipRoadMidpoint = [-85.62975395449628, 41.95787501510204];
-	    var tulipRoadIntersection = [-85.62974496187628, 41.95742515554585];
-	    var roadCategory = _mainPresetIndex.item('category-road_minor');
-	    var residentialPreset = _mainPresetIndex.item('highway/residential');
-	    var woodRoadID = 'w525';
-	    var woodRoadEndID = 'n2862';
-	    var woodRoadAddNode = [-85.62390110349587, 41.95397111462291];
-	    var woodRoadDragEndpoint = [-85.623867390213, 41.95466987786487];
-	    var woodRoadDragMidpoint = [-85.62386254803509, 41.95430395953872];
-	    var washingtonStreetID = 'w522';
-	    var twelfthAvenueID = 'w1';
-	    var eleventhAvenueEndID = 'n3550';
-	    var twelfthAvenueEndID = 'n5';
-	    var _washingtonSegmentID = null;
-	    var eleventhAvenueEnd = context.entity(eleventhAvenueEndID).loc;
-	    var twelfthAvenueEnd = context.entity(twelfthAvenueEndID).loc;
-	    var deleteLinesLoc = [-85.6219395542764, 41.95228033922477];
-	    var twelfthAvenue = [-85.62219310052491, 41.952505413152956];
-
-
-	    var chapter = {
-	        title: 'intro.lines.title'
-	    };
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
+	  function chooseCategoryRoad() {
+	    if (context.mode().id !== 'select') return chapter.restart();
+	    context.on('exit.intro', function () {
+	      return chapter.restart();
+	    });
+	    var button = context.container().select('.preset-category-road_minor .preset-list-button');
+	    if (button.empty()) return chapter.restart(); // disallow scrolling
+
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      reveal(button.node(), helpHtml('intro.lines.choose_category_road', {
+	        category: roadCategory.name()
+	      }));
+	      button.on('click.intro', function () {
+	        continueTo(choosePresetResidential);
+	      });
+	    }, 400); // after editor pane visible
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function choosePresetResidential() {
+	    if (context.mode().id !== 'select') return chapter.restart();
+	    context.on('exit.intro', function () {
+	      return chapter.restart();
+	    });
+	    var subgrid = context.container().select('.preset-category-road_minor .subgrid');
+	    if (subgrid.empty()) return chapter.restart();
+	    subgrid.selectAll(':not(.preset-highway-residential) .preset-list-button').on('click.intro', function () {
+	      continueTo(retryPresetResidential);
+	    });
+	    subgrid.selectAll('.preset-highway-residential .preset-list-button').on('click.intro', function () {
+	      continueTo(nameRoad);
+	    });
+	    timeout(function () {
+	      reveal(subgrid.node(), helpHtml('intro.lines.choose_preset_residential', {
+	        preset: residentialPreset.name()
+	      }), {
+	        tooltipBox: '.preset-highway-residential .preset-list-button',
+	        duration: 300
+	      });
+	    }, 300);
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
+	    function continueTo(nextStep) {
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
+	  } // selected wrong road type
 
 
-	    function addLine() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
+	  function retryPresetResidential() {
+	    if (context.mode().id !== 'select') return chapter.restart();
+	    context.on('exit.intro', function () {
+	      return chapter.restart();
+	    }); // disallow scrolling
 
-	        var msec = transitionTime(tulipRoadStart, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(tulipRoadStart, 18.5, msec);
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      var button = context.container().select('.entity-editor-pane .preset-list-button');
+	      reveal(button.node(), helpHtml('intro.lines.retry_preset_residential', {
+	        preset: residentialPreset.name()
+	      }));
+	      button.on('click.intro', function () {
+	        continueTo(chooseCategoryRoad);
+	      });
+	    }, 500);
 
-	        timeout(function() {
-	            var tooltip = reveal('button.add-line',
-	                helpString('intro.lines.add_line'));
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            tooltip.selectAll('.popover-inner')
-	                .insert('svg', 'span')
-	                .attr('class', 'tooltip-illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-graphic-lines');
+	  function nameRoad() {
+	    context.on('exit.intro', function () {
+	      continueTo(didNameRoad);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.lines.name_road', {
+	        button: {
+	          html: icon('#iD-icon-close', 'inline')
+	        }
+	      }), {
+	        tooltipClass: 'intro-lines-name_road'
+	      });
+	    }, 500);
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-line') { return; }
-	                continueTo(startLine);
-	            });
-	        }, msec + 100);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
+	  function didNameRoad() {
+	    context.history().checkpoint('doneAddLine');
+	    timeout(function () {
+	      reveal('.surface', helpHtml('intro.lines.did_name_road'), {
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: function buttonCallback() {
+	          continueTo(updateLine);
 	        }
+	      });
+	    }, 500);
+
+	    function continueTo(nextStep) {
+	      nextStep();
 	    }
+	  }
 
+	  function updateLine() {
+	    context.history().reset('doneAddLine');
 
-	    function startLine() {
-	        if (context.mode().id !== 'add-line') { return chapter.restart(); }
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return chapter.restart();
+	    }
 
-	        _tulipRoadID = null;
+	    var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
 
-	        var padding = 70 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(tulipRoadStart, padding, context);
-	        box.height = box.height + 100;
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	        var textId = context.lastPointerType() === 'mouse' ? 'start_line' : 'start_line_tap';
-	        var startLineString = helpString('intro.lines.missing_road') + '{br}' +
-	            helpString('intro.lines.line_draw_info') +
-	            helpString('intro.lines.' + textId);
-	        reveal(box, startLineString);
+	    context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
+	    timeout(function () {
+	      var padding = 250 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragMidpoint, padding, context);
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            padding = 70 * Math.pow(2, context.map().zoom() - 18);
-	            box = pad(tulipRoadStart, padding, context);
-	            box.height = box.height + 100;
-	            reveal(box, startLineString, { duration: 0 });
-	        });
+	      var advance = function advance() {
+	        continueTo(addNode);
+	      };
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'draw-line') { return chapter.restart(); }
-	            continueTo(drawLine);
+	      reveal(box, helpHtml('intro.lines.update_line'), {
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: advance
+	      });
+	      context.map().on('move.intro drawn.intro', function () {
+	        var padding = 250 * Math.pow(2, context.map().zoom() - 19);
+	        var box = pad(woodRoadDragMidpoint, padding, context);
+	        reveal(box, helpHtml('intro.lines.update_line'), {
+	          duration: 0,
+	          buttonText: _t.html('intro.ok'),
+	          buttonCallback: advance
 	        });
+	      });
+	    }, msec + 100);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function addNode() {
+	    context.history().reset('doneAddLine');
 
-	    function drawLine() {
-	        if (context.mode().id !== 'draw-line') { return chapter.restart(); }
-
-	        _tulipRoadID = context.mode().selectedIDs()[0];
-	        context.map().centerEase(tulipRoadMidpoint, 500);
-
-	        timeout(function() {
-	            var padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
-	            var box = pad(tulipRoadMidpoint, padding, context);
-	            box.height = box.height * 2;
-	            reveal(box,
-	                helpString('intro.lines.intersect', { name: _t('intro.graph.name.flower-street') })
-	            );
-
-	            context.map().on('move.intro drawn.intro', function() {
-	                padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
-	                box = pad(tulipRoadMidpoint, padding, context);
-	                box.height = box.height * 2;
-	                reveal(box,
-	                    helpString('intro.lines.intersect', { name: _t('intro.graph.name.flower-street') }),
-	                    { duration: 0 }
-	                );
-	            });
-	        }, 550);  // after easing..
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return chapter.restart();
+	    }
 
-	        context.history().on('change.intro', function() {
-	            if (isLineConnected()) {
-	                continueTo(continueLine);
-	            }
-	        });
+	    var padding = 40 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadAddNode, padding, context);
+	    var addNodeString = helpHtml('intro.lines.add_node' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
+	    reveal(box, addNodeString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      var padding = 40 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadAddNode, padding, context);
+	      reveal(box, addNodeString, {
+	        duration: 0
+	      });
+	    });
+	    context.history().on('change.intro', function (changed) {
+	      if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	        return continueTo(updateLine);
+	      }
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-line') {
-	                return;
-	            } else if (mode.id === 'select') {
-	                continueTo(retryIntersect);
-	                return;
-	            } else {
-	                return chapter.restart();
-	            }
-	        });
+	      if (changed.created().length === 1) {
+	        timeout(function () {
+	          continueTo(startDragEndpoint);
+	        }, 500);
+	      }
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') {
+	        continueTo(updateLine);
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
-
-	    function isLineConnected() {
-	        var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
-	        if (!entity) { return false; }
-
-	        var drawNodes = context.graph().childNodes(entity);
-	        return drawNodes.some(function(node) {
-	            return context.graph().parentWays(node).some(function(parent) {
-	                return parent.id === flowerRoadID;
-	            });
-	        });
+	  function startDragEndpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
 	    }
 
+	    var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadDragEndpoint, padding, context);
+	    var startDragString = helpHtml('intro.lines.start_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch')) + helpHtml('intro.lines.drag_to_intersection');
+	    reveal(box, startDragString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	        return continueTo(updateLine);
+	      }
 
-	    function retryIntersect() {
-	        select(window).on('pointerdown.intro mousedown.intro', eventCancel, true);
+	      var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragEndpoint, padding, context);
+	      reveal(box, startDragString, {
+	        duration: 0
+	      });
+	      var entity = context.entity(woodRoadEndID);
 
-	        var box = pad(tulipRoadIntersection, 80, context);
-	        reveal(box,
-	            helpString('intro.lines.retry_intersect', { name: _t('intro.graph.name.flower-street') })
-	        );
+	      if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
+	        continueTo(finishDragEndpoint);
+	      }
+	    });
 
-	        timeout(chapter.restart, 3000);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function finishDragEndpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
+	    }
 
-	    function continueLine() {
-	        if (context.mode().id !== 'draw-line') { return chapter.restart(); }
-	        var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
-	        if (!entity) { return chapter.restart(); }
-
-	        context.map().centerEase(tulipRoadIntersection, 500);
+	    var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadDragEndpoint, padding, context);
+	    var finishDragString = helpHtml('intro.lines.spot_looks_good') + helpHtml('intro.lines.finish_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
+	    reveal(box, finishDragString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	        return continueTo(updateLine);
+	      }
 
-	        var continueLineText = helpString('intro.lines.continue_line') + '{br}' +
-	            helpString('intro.lines.finish_line_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.lines.finish_road');
+	      var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragEndpoint, padding, context);
+	      reveal(box, finishDragString, {
+	        duration: 0
+	      });
+	      var entity = context.entity(woodRoadEndID);
 
-	        reveal('.surface', continueLineText);
+	      if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
+	        continueTo(startDragEndpoint);
+	      }
+	    });
+	    context.on('enter.intro', function () {
+	      continueTo(startDragMidpoint);
+	    });
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-line')
-	                { return; }
-	            else if (mode.id === 'select')
-	                { return continueTo(chooseCategoryRoad); }
-	            else
-	                { return chapter.restart(); }
-	        });
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	  function startDragMidpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
 	    }
 
+	    if (context.selectedIDs().indexOf(woodRoadID) === -1) {
+	      context.enter(modeSelect(context, [woodRoadID]));
+	    }
 
-	    function chooseCategoryRoad() {
-	        if (context.mode().id !== 'select') { return chapter.restart(); }
+	    var padding = 80 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadDragMidpoint, padding, context);
+	    reveal(box, helpHtml('intro.lines.start_drag_midpoint'));
+	    context.map().on('move.intro drawn.intro', function () {
+	      if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	        return continueTo(updateLine);
+	      }
 
-	        context.on('exit.intro', function() {
-	            return chapter.restart();
-	        });
+	      var padding = 80 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragMidpoint, padding, context);
+	      reveal(box, helpHtml('intro.lines.start_drag_midpoint'), {
+	        duration: 0
+	      });
+	    });
+	    context.history().on('change.intro', function (changed) {
+	      if (changed.created().length === 1) {
+	        continueTo(continueDragMidpoint);
+	      }
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') {
+	        // keep Wood Road selected so midpoint triangles are drawn..
+	        context.enter(modeSelect(context, [woodRoadID]));
+	      }
+	    });
 
-	        var button = context.container().select('.preset-category-road_minor .preset-list-button');
-	        if (button.empty()) { return chapter.restart(); }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	  function continueDragMidpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
+	    }
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	    var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadDragEndpoint, padding, context);
+	    box.height += 400;
 
-	            reveal(button.node(),
-	                helpString('intro.lines.choose_category_road', { category: roadCategory.name() })
-	            );
+	    var advance = function advance() {
+	      context.history().checkpoint('doneUpdateLine');
+	      continueTo(deleteLines);
+	    };
 
-	            button.on('click.intro', function() {
-	                continueTo(choosePresetResidential);
-	            });
+	    reveal(box, helpHtml('intro.lines.continue_drag_midpoint'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: advance
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	        return continueTo(updateLine);
+	      }
 
-	        }, 400);  // after editor pane visible
+	      var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragEndpoint, padding, context);
+	      box.height += 400;
+	      reveal(box, helpHtml('intro.lines.continue_drag_midpoint'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: advance
+	      });
+	    });
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function deleteLines() {
+	    context.history().reset('doneUpdateLine');
+	    context.enter(modeBrowse(context));
 
-	    function choosePresetResidential() {
-	        if (context.mode().id !== 'select') { return chapter.restart(); }
-
-	        context.on('exit.intro', function() {
-	            return chapter.restart();
-	        });
-
-	        var subgrid = context.container().select('.preset-category-road_minor .subgrid');
-	        if (subgrid.empty()) { return chapter.restart(); }
-
-	        subgrid.selectAll(':not(.preset-highway-residential) .preset-list-button')
-	            .on('click.intro', function() {
-	                continueTo(retryPresetResidential);
-	            });
-
-	        subgrid.selectAll('.preset-highway-residential .preset-list-button')
-	            .on('click.intro', function() {
-	                continueTo(nameRoad);
-	            });
+	    if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return chapter.restart();
+	    }
 
-	        timeout(function() {
-	            reveal(subgrid.node(),
-	                helpString('intro.lines.choose_preset_residential', { preset: residentialPreset.name() }),
-	                { tooltipBox: '.preset-highway-residential .preset-list-button', duration: 300 }
-	            );
-	        }, 300);
+	    var msec = transitionTime(deleteLinesLoc, context.map().center());
 
-	        function continueTo(nextStep) {
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
+	    context.map().centerZoomEase(deleteLinesLoc, 18, msec);
+	    timeout(function () {
+	      var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	      var box = pad(deleteLinesLoc, padding, context);
+	      box.top -= 200;
+	      box.height += 400;
 
-	    // selected wrong road type
-	    function retryPresetResidential() {
-	        if (context.mode().id !== 'select') { return chapter.restart(); }
+	      var advance = function advance() {
+	        continueTo(rightClickIntersection);
+	      };
 
-	        context.on('exit.intro', function() {
-	            return chapter.restart();
+	      reveal(box, helpHtml('intro.lines.delete_lines', {
+	        street: _t('intro.graph.name.12th-avenue')
+	      }), {
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: advance
+	      });
+	      context.map().on('move.intro drawn.intro', function () {
+	        var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	        var box = pad(deleteLinesLoc, padding, context);
+	        box.top -= 200;
+	        box.height += 400;
+	        reveal(box, helpHtml('intro.lines.delete_lines', {
+	          street: _t('intro.graph.name.12th-avenue')
+	        }), {
+	          duration: 0,
+	          buttonText: _t.html('intro.ok'),
+	          buttonCallback: advance
 	        });
+	      });
+	      context.history().on('change.intro', function () {
+	        timeout(function () {
+	          continueTo(deleteLines);
+	        }, 500); // after any transition (e.g. if user deleted intersection)
+	      });
+	    }, msec + 100);
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        timeout(function() {
-	            var button = context.container().select('.entity-editor-pane .preset-list-button');
+	  function rightClickIntersection() {
+	    context.history().reset('doneUpdateLine');
+	    context.enter(modeBrowse(context));
+	    context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
+	    var rightClickString = helpHtml('intro.lines.split_street', {
+	      street1: _t('intro.graph.name.11th-avenue'),
+	      street2: _t('intro.graph.name.washington-street')
+	    }) + helpHtml('intro.lines.' + (context.lastPointerType() === 'mouse' ? 'rightclick_intersection' : 'edit_menu_intersection_touch'));
+	    timeout(function () {
+	      var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	      var box = pad(eleventhAvenueEnd, padding, context);
+	      reveal(box, rightClickString);
+	      context.map().on('move.intro drawn.intro', function () {
+	        var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	        var box = pad(eleventhAvenueEnd, padding, context);
+	        reveal(box, rightClickString, {
+	          duration: 0
+	        });
+	      });
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'select') return;
+	        var ids = context.selectedIDs();
+	        if (ids.length !== 1 || ids[0] !== eleventhAvenueEndID) return;
+	        timeout(function () {
+	          var node = selectMenuItem(context, 'split').node();
+	          if (!node) return;
+	          continueTo(splitIntersection);
+	        }, 50); // after menu visible
+	      });
+	      context.history().on('change.intro', function () {
+	        timeout(function () {
+	          continueTo(deleteLines);
+	        }, 300); // after any transition (e.g. if user deleted intersection)
+	      });
+	    }, 600);
 
-	            reveal(button.node(),
-	                helpString('intro.lines.retry_preset_residential', { preset: residentialPreset.name() })
-	            );
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            button.on('click.intro', function() {
-	                continueTo(chooseCategoryRoad);
-	            });
+	  function splitIntersection() {
+	    if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(deleteLines);
+	    }
 
-	        }, 500);
+	    var node = selectMenuItem(context, 'split').node();
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    if (!node) {
+	      return continueTo(rightClickIntersection);
 	    }
 
+	    var wasChanged = false;
+	    _washingtonSegmentID = null;
+	    reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
+	      street: _t('intro.graph.name.washington-street')
+	    }), {
+	      padding: 50
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      var node = selectMenuItem(context, 'split').node();
 
-	    function nameRoad() {
-	        context.on('exit.intro', function() {
-	            continueTo(didNameRoad);
-	        });
-
-	        timeout(function() {
-	            reveal('.entity-editor-pane',
-	                helpString('intro.lines.name_road', { button: icon('#iD-icon-close', 'pre-text') }),
-	                { tooltipClass: 'intro-lines-name_road' }
-	            );
-	        }, 500);
+	      if (!wasChanged && !node) {
+	        return continueTo(rightClickIntersection);
+	      }
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
+	      reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
+	        street: _t('intro.graph.name.washington-street')
+	      }), {
+	        duration: 0,
+	        padding: 50
+	      });
+	    });
+	    context.history().on('change.intro', function (changed) {
+	      wasChanged = true;
+	      timeout(function () {
+	        if (context.history().undoAnnotation() === _t('operations.split.annotation.line', {
+	          n: 1
+	        })) {
+	          _washingtonSegmentID = changed.created()[0].id;
+	          continueTo(didSplit);
+	        } else {
+	          _washingtonSegmentID = null;
+	          continueTo(retrySplit);
 	        }
+	      }, 300); // after any transition (e.g. if user deleted intersection)
+	    });
+
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function retrySplit() {
+	    context.enter(modeBrowse(context));
+	    context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
 
-	    function didNameRoad() {
-	        context.history().checkpoint('doneAddLine');
+	    var advance = function advance() {
+	      continueTo(rightClickIntersection);
+	    };
 
-	        timeout(function() {
-	            reveal('.surface', helpString('intro.lines.did_name_road'), {
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { continueTo(updateLine); }
-	            });
-	        }, 500);
+	    var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	    var box = pad(eleventhAvenueEnd, padding, context);
+	    reveal(box, helpHtml('intro.lines.retry_split'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: advance
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	      var box = pad(eleventhAvenueEnd, padding, context);
+	      reveal(box, helpHtml('intro.lines.retry_split'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: advance
+	      });
+	    });
 
-	        function continueTo(nextStep) {
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function didSplit() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
+	    }
 
-	    function updateLine() {
-	        context.history().reset('doneAddLine');
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return chapter.restart();
-	        }
-
-	        var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
+	    var ids = context.selectedIDs();
+	    var string = 'intro.lines.did_split_' + (ids.length > 1 ? 'multi' : 'single');
+	    var street = _t('intro.graph.name.washington-street');
+	    var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	    var box = pad(twelfthAvenue, padding, context);
+	    box.width = box.width / 2;
+	    reveal(box, helpHtml(string, {
+	      street1: street,
+	      street2: street
+	    }), {
+	      duration: 500
+	    });
+	    timeout(function () {
+	      context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	      context.map().on('move.intro drawn.intro', function () {
+	        var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	        var box = pad(twelfthAvenue, padding, context);
+	        box.width = box.width / 2;
+	        reveal(box, helpHtml(string, {
+	          street1: street,
+	          street2: street
+	        }), {
+	          duration: 0
+	        });
+	      });
+	    }, 600); // after initial reveal and curtain cut
 
-	        timeout(function() {
-	            var padding = 250 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragMidpoint, padding, context);
-	            var advance = function() { continueTo(addNode); };
+	    context.on('enter.intro', function () {
+	      var ids = context.selectedIDs();
 
-	            reveal(box, helpString('intro.lines.update_line'),
-	                { buttonText: _t('intro.ok'), buttonCallback: advance }
-	            );
+	      if (ids.length === 1 && ids[0] === _washingtonSegmentID) {
+	        continueTo(multiSelect);
+	      }
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	        return continueTo(rightClickIntersection);
+	      }
+	    });
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                var padding = 250 * Math.pow(2, context.map().zoom() - 19);
-	                var box = pad(woodRoadDragMidpoint, padding, context);
-	                reveal(box, helpString('intro.lines.update_line'),
-	                    { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-	                );
-	            });
-	        }, msec + 100);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
+	  function multiSelect() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
 	    }
 
+	    var ids = context.selectedIDs();
+	    var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
+	    var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;
 
-	    function addNode() {
-	        context.history().reset('doneAddLine');
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return chapter.restart();
-	        }
+	    if (hasWashington && hasTwelfth) {
+	      return continueTo(multiRightClick);
+	    } else if (!hasWashington && !hasTwelfth) {
+	      return continueTo(didSplit);
+	    }
 
-	        var padding = 40 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadAddNode, padding, context);
-	        var addNodeString = helpString('intro.lines.add_node' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
-	        reveal(box, addNodeString);
+	    context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	    timeout(function () {
+	      var selected, other, padding, box;
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var padding = 40 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadAddNode, padding, context);
-	            reveal(box, addNodeString, { duration: 0 });
-	        });
+	      if (hasWashington) {
+	        selected = _t('intro.graph.name.washington-street');
+	        other = _t('intro.graph.name.12th-avenue');
+	        padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	        box = pad(twelfthAvenueEnd, padding, context);
+	        box.width *= 3;
+	      } else {
+	        selected = _t('intro.graph.name.12th-avenue');
+	        other = _t('intro.graph.name.washington-street');
+	        padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	        box = pad(twelfthAvenue, padding, context);
+	        box.width /= 2;
+	      }
 
-	        context.history().on('change.intro', function(changed) {
-	            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	                return continueTo(updateLine);
-	            }
-	            if (changed.created().length === 1) {
-	                timeout(function() { continueTo(startDragEndpoint); }, 500);
-	            }
+	      reveal(box, helpHtml('intro.lines.multi_select', {
+	        selected: selected,
+	        other1: other
+	      }) + ' ' + helpHtml('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'), {
+	        selected: selected,
+	        other2: other
+	      }));
+	      context.map().on('move.intro drawn.intro', function () {
+	        if (hasWashington) {
+	          selected = _t('intro.graph.name.washington-street');
+	          other = _t('intro.graph.name.12th-avenue');
+	          padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	          box = pad(twelfthAvenueEnd, padding, context);
+	          box.width *= 3;
+	        } else {
+	          selected = _t('intro.graph.name.12th-avenue');
+	          other = _t('intro.graph.name.washington-street');
+	          padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	          box = pad(twelfthAvenue, padding, context);
+	          box.width /= 2;
+	        }
+
+	        reveal(box, helpHtml('intro.lines.multi_select', {
+	          selected: selected,
+	          other1: other
+	        }) + ' ' + helpHtml('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'), {
+	          selected: selected,
+	          other2: other
+	        }), {
+	          duration: 0
 	        });
+	      });
+	      context.on('enter.intro', function () {
+	        continueTo(multiSelect);
+	      });
+	      context.history().on('change.intro', function () {
+	        if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	          return continueTo(rightClickIntersection);
+	        }
+	      });
+	    }, 600);
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') {
-	                continueTo(updateLine);
-	            }
-	        });
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	  function multiRightClick() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
 	    }
 
+	    var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	    var box = pad(twelfthAvenue, padding, context);
+	    var rightClickString = helpHtml('intro.lines.multi_select_success') + helpHtml('intro.lines.multi_' + (context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch'));
+	    reveal(box, rightClickString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	      var box = pad(twelfthAvenue, padding, context);
+	      reveal(box, rightClickString, {
+	        duration: 0
+	      });
+	    });
+	    context.ui().editMenu().on('toggled.intro', function (open) {
+	      if (!open) return;
+	      timeout(function () {
+	        var ids = context.selectedIDs();
 
-	    function startDragEndpoint() {
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return continueTo(updateLine);
+	        if (ids.length === 2 && ids.indexOf(twelfthAvenueID) !== -1 && ids.indexOf(_washingtonSegmentID) !== -1) {
+	          var node = selectMenuItem(context, 'delete').node();
+	          if (!node) return;
+	          continueTo(multiDelete);
+	        } else if (ids.length === 1 && ids.indexOf(_washingtonSegmentID) !== -1) {
+	          return continueTo(multiSelect);
+	        } else {
+	          return continueTo(didSplit);
 	        }
-	        var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadDragEndpoint, padding, context);
-	        var startDragString = helpString('intro.lines.start_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch')) +
-	            helpString('intro.lines.drag_to_intersection');
-	        reveal(box, startDragString);
-
-	        context.map().on('move.intro drawn.intro', function() {
-	            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	                return continueTo(updateLine);
-	            }
-	            var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragEndpoint, padding, context);
-	            reveal(box, startDragString, { duration: 0 });
-
-	            var entity = context.entity(woodRoadEndID);
-	            if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
-	                continueTo(finishDragEndpoint);
-	            }
-	        });
+	      }, 300); // after edit menu visible
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	        return continueTo(rightClickIntersection);
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.ui().editMenu().on('toggled.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function multiDelete() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
+	    }
 
-	    function finishDragEndpoint() {
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return continueTo(updateLine);
-	        }
-
-	        var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadDragEndpoint, padding, context);
-	        var finishDragString = helpString('intro.lines.spot_looks_good') +
-	            helpString('intro.lines.finish_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
-	        reveal(box, finishDragString);
-
-	        context.map().on('move.intro drawn.intro', function() {
-	            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	                return continueTo(updateLine);
-	            }
-	            var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragEndpoint, padding, context);
-	            reveal(box, finishDragString, { duration: 0 });
+	    var node = selectMenuItem(context, 'delete').node();
+	    if (!node) return continueTo(multiRightClick);
+	    reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
+	      padding: 50
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
+	        duration: 0,
+	        padding: 50
+	      });
+	    });
+	    context.on('exit.intro', function () {
+	      if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
+	        return continueTo(multiSelect); // left select mode but roads still exist
+	      }
+	    });
+	    context.history().on('change.intro', function () {
+	      if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
+	        continueTo(retryDelete); // changed something but roads still exist
+	      } else {
+	        continueTo(play);
+	      }
+	    });
 
-	            var entity = context.entity(woodRoadEndID);
-	            if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
-	                continueTo(startDragEndpoint);
-	            }
-	        });
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.on('enter.intro', function() {
-	            continueTo(startDragMidpoint);
-	        });
+	  function retryDelete() {
+	    context.enter(modeBrowse(context));
+	    var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	    var box = pad(twelfthAvenue, padding, context);
+	    reveal(box, helpHtml('intro.lines.retry_delete'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(multiSelect);
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      nextStep();
 	    }
+	  }
 
+	  function play() {
+	    dispatch.call('done');
+	    reveal('.ideditor', helpHtml('intro.lines.play', {
+	      next: _t('intro.buildings.title')
+	    }), {
+	      tooltipBox: '.intro-nav-wrap .chapter-building',
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        reveal('.ideditor');
+	      }
+	    });
+	  }
 
-	    function startDragMidpoint() {
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return continueTo(updateLine);
-	        }
-	        if (context.selectedIDs().indexOf(woodRoadID) === -1) {
-	            context.enter(modeSelect(context, [woodRoadID]));
-	        }
+	  chapter.enter = function () {
+	    addLine();
+	  };
 
-	        var padding = 80 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadDragMidpoint, padding, context);
-	        reveal(box, helpString('intro.lines.start_drag_midpoint'));
+	  chapter.exit = function () {
+	    timeouts.forEach(window.clearTimeout);
+	    select(window).on('pointerdown.intro mousedown.intro', null, true);
+	    context.on('enter.intro exit.intro', null);
+	    context.map().on('move.intro drawn.intro', null);
+	    context.history().on('change.intro', null);
+	    context.container().select('.inspector-wrap').on('wheel.intro', null);
+	    context.container().select('.preset-list-button').on('click.intro', null);
+	  };
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	                return continueTo(updateLine);
-	            }
-	            var padding = 80 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragMidpoint, padding, context);
-	            reveal(box, helpString('intro.lines.start_drag_midpoint'), { duration: 0 });
-	        });
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	        context.history().on('change.intro', function(changed) {
-	            if (changed.created().length === 1) {
-	                continueTo(continueDragMidpoint);
-	            }
-	        });
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') {
-	                // keep Wood Road selected so midpoint triangles are drawn..
-	                context.enter(modeSelect(context, [woodRoadID]));
-	            }
-	        });
+	function uiIntroBuilding(context, reveal) {
+	  var dispatch = dispatch$8('done');
+	  var house = [-85.62815, 41.95638];
+	  var tank = [-85.62732, 41.95347];
+	  var buildingCatetory = _mainPresetIndex.item('category-building');
+	  var housePreset = _mainPresetIndex.item('building/house');
+	  var tankPreset = _mainPresetIndex.item('man_made/storage_tank');
+	  var timeouts = [];
+	  var _houseID = null;
+	  var _tankID = null;
+	  var chapter = {
+	    title: 'intro.buildings.title'
+	  };
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	    function continueDragMidpoint() {
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return continueTo(updateLine);
-	        }
+	  function revealHouse(center, text, options) {
+	    var padding = 160 * Math.pow(2, context.map().zoom() - 20);
+	    var box = pad(center, padding, context);
+	    reveal(box, text, options);
+	  }
 
-	        var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadDragEndpoint, padding, context);
-	        box.height += 400;
+	  function revealTank(center, text, options) {
+	    var padding = 190 * Math.pow(2, context.map().zoom() - 19.5);
+	    var box = pad(center, padding, context);
+	    reveal(box, text, options);
+	  }
 
-	        var advance = function() {
-	            context.history().checkpoint('doneUpdateLine');
-	            continueTo(deleteLines);
-	        };
+	  function addHouse() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    _houseID = null;
+	    var msec = transitionTime(house, context.map().center());
 
-	        reveal(box, helpString('intro.lines.continue_drag_midpoint'),
-	            { buttonText: _t('intro.ok'), buttonCallback: advance }
-	        );
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	                return continueTo(updateLine);
-	            }
-	            var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragEndpoint, padding, context);
-	            box.height += 400;
-	            reveal(box, helpString('intro.lines.continue_drag_midpoint'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-	            );
-	        });
+	    context.map().centerZoomEase(house, 19, msec);
+	    timeout(function () {
+	      var tooltip = reveal('button.add-area', helpHtml('intro.buildings.add_building'));
+	      tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-buildings');
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'add-area') return;
+	        continueTo(startHouse);
+	      });
+	    }, msec + 100);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function startHouse() {
+	    if (context.mode().id !== 'add-area') {
+	      return continueTo(addHouse);
+	    }
 
-	    function deleteLines() {
-	        context.history().reset('doneUpdateLine');
-	        context.enter(modeBrowse(context));
+	    _houseID = null;
+	    context.map().zoomEase(20, 500);
+	    timeout(function () {
+	      var startString = helpHtml('intro.buildings.start_building') + helpHtml('intro.buildings.building_corner_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
+	      revealHouse(house, startString);
+	      context.map().on('move.intro drawn.intro', function () {
+	        revealHouse(house, startString, {
+	          duration: 0
+	        });
+	      });
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'draw-area') return chapter.restart();
+	        continueTo(continueHouse);
+	      });
+	    }, 550); // after easing
 
-	        if (!context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return chapter.restart();
-	        }
-
-	        var msec = transitionTime(deleteLinesLoc, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(deleteLinesLoc, 18, msec);
-
-	        timeout(function() {
-	            var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	            var box = pad(deleteLinesLoc, padding, context);
-	            box.top -= 200;
-	            box.height += 400;
-	            var advance = function() { continueTo(rightClickIntersection); };
-
-	            reveal(box, helpString('intro.lines.delete_lines', { street: _t('intro.graph.name.12th-avenue') }),
-	                { buttonText: _t('intro.ok'), buttonCallback: advance }
-	            );
-
-	            context.map().on('move.intro drawn.intro', function() {
-	                var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	                var box = pad(deleteLinesLoc, padding, context);
-	                box.top -= 200;
-	                box.height += 400;
-	                reveal(box, helpString('intro.lines.delete_lines', { street: _t('intro.graph.name.12th-avenue') }),
-	                    { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-	                );
-	            });
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            context.history().on('change.intro', function() {
-	                timeout(function() {
-	                    continueTo(deleteLines);
-	                }, 500);  // after any transition (e.g. if user deleted intersection)
-	            });
+	  function continueHouse() {
+	    if (context.mode().id !== 'draw-area') {
+	      return continueTo(addHouse);
+	    }
 
-	        }, msec + 100);
+	    _houseID = null;
+	    var continueString = helpHtml('intro.buildings.continue_building') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_building');
+	    revealHouse(house, continueString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      revealHouse(house, continueString, {
+	        duration: 0
+	      });
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-area') {
+	        return;
+	      } else if (mode.id === 'select') {
+	        var graph = context.graph();
+	        var way = context.entity(context.selectedIDs()[0]);
+	        var nodes = graph.childNodes(way);
+	        var points = utilArrayUniq(nodes).map(function (n) {
+	          return context.projection(n.loc);
+	        });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
+	        if (isMostlySquare(points)) {
+	          _houseID = way.id;
+	          return continueTo(chooseCategoryBuilding);
+	        } else {
+	          return continueTo(retryHouse);
 	        }
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
+
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function retryHouse() {
+	    var onClick = function onClick() {
+	      continueTo(addHouse);
+	    };
 
-	    function rightClickIntersection() {
-	        context.history().reset('doneUpdateLine');
-	        context.enter(modeBrowse(context));
+	    revealHouse(house, helpHtml('intro.buildings.retry_building'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      revealHouse(house, helpHtml('intro.buildings.retry_building'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: onClick
+	      });
+	    });
 
-	        context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var rightClickString = helpString('intro.lines.split_street', {
-	                street1: _t('intro.graph.name.11th-avenue'),
-	                street2: _t('intro.graph.name.washington-street')
-	            }) +
-	            helpString('intro.lines.' + (context.lastPointerType() === 'mouse' ? 'rightclick_intersection' : 'edit_menu_intersection_touch'));
+	  function chooseCategoryBuilding() {
+	    if (!_houseID || !context.hasEntity(_houseID)) {
+	      return addHouse();
+	    }
 
-	        timeout(function() {
-	            var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	            var box = pad(eleventhAvenueEnd, padding, context);
-	            reveal(box, rightClickString);
+	    var ids = context.selectedIDs();
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	                var box = pad(eleventhAvenueEnd, padding, context);
-	                reveal(box, rightClickString,
-	                    { duration: 0 }
-	                );
-	            });
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	      context.enter(modeSelect(context, [_houseID]));
+	    } // disallow scrolling
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'select') { return; }
-	                var ids = context.selectedIDs();
-	                if (ids.length !== 1 || ids[0] !== eleventhAvenueEndID) { return; }
 
-	                timeout(function() {
-	                    var node = selectMenuItem(context, 'split').node();
-	                    if (!node) { return; }
-	                    continueTo(splitIntersection);
-	                }, 50);  // after menu visible
-	            });
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      var button = context.container().select('.preset-category-building .preset-list-button');
+	      reveal(button.node(), helpHtml('intro.buildings.choose_category_building', {
+	        category: buildingCatetory.name()
+	      }));
+	      button.on('click.intro', function () {
+	        button.on('click.intro', null);
+	        continueTo(choosePresetHouse);
+	      });
+	    }, 400); // after preset list pane visible..
 
-	            context.history().on('change.intro', function() {
-	                timeout(function() {
-	                    continueTo(deleteLines);
-	                }, 300);  // after any transition (e.g. if user deleted intersection)
-	            });
+	    context.on('enter.intro', function (mode) {
+	      if (!_houseID || !context.hasEntity(_houseID)) {
+	        return continueTo(addHouse);
+	      }
 
-	        }, 600);
+	      var ids = context.selectedIDs();
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	        return continueTo(chooseCategoryBuilding);
+	      }
+	    });
+
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function choosePresetHouse() {
+	    if (!_houseID || !context.hasEntity(_houseID)) {
+	      return addHouse();
+	    }
 
-	    function splitIntersection() {
-	        if (!context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(deleteLines);
-	        }
+	    var ids = context.selectedIDs();
 
-	        var node = selectMenuItem(context, 'split').node();
-	        if (!node) { return continueTo(rightClickIntersection); }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	      context.enter(modeSelect(context, [_houseID]));
+	    } // disallow scrolling
 
-	        var wasChanged = false;
-	        _washingtonSegmentID = null;
 
-	        reveal('.edit-menu', helpString('intro.lines.split_intersection',
-	            { street: _t('intro.graph.name.washington-street') }),
-	            { padding: 50 }
-	        );
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      var button = context.container().select('.preset-building-house .preset-list-button');
+	      reveal(button.node(), helpHtml('intro.buildings.choose_preset_house', {
+	        preset: housePreset.name()
+	      }), {
+	        duration: 300
+	      });
+	      button.on('click.intro', function () {
+	        button.on('click.intro', null);
+	        continueTo(closeEditorHouse);
+	      });
+	    }, 400); // after preset list pane visible..
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var node = selectMenuItem(context, 'split').node();
-	            if (!wasChanged && !node) { return continueTo(rightClickIntersection); }
+	    context.on('enter.intro', function (mode) {
+	      if (!_houseID || !context.hasEntity(_houseID)) {
+	        return continueTo(addHouse);
+	      }
 
-	            reveal('.edit-menu', helpString('intro.lines.split_intersection',
-	                { street: _t('intro.graph.name.washington-street') }),
-	                { duration: 0, padding: 50 }
-	            );
-	        });
+	      var ids = context.selectedIDs();
 
-	        context.history().on('change.intro', function(changed) {
-	            wasChanged = true;
-	            timeout(function() {
-	                if (context.history().undoAnnotation() === _t('operations.split.annotation.line')) {
-	                    _washingtonSegmentID = changed.created()[0].id;
-	                    continueTo(didSplit);
-	                } else {
-	                    _washingtonSegmentID = null;
-	                    continueTo(retrySplit);
-	                }
-	            }, 300);  // after any transition (e.g. if user deleted intersection)
-	        });
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	        return continueTo(chooseCategoryBuilding);
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function closeEditorHouse() {
+	    if (!_houseID || !context.hasEntity(_houseID)) {
+	      return addHouse();
+	    }
 
-	    function retrySplit() {
-	        context.enter(modeBrowse(context));
-	        context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
-	        var advance = function() { continueTo(rightClickIntersection); };
-
-	        var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(eleventhAvenueEnd, padding, context);
-	        reveal(box, helpString('intro.lines.retry_split'),
-	            { buttonText: _t('intro.ok'), buttonCallback: advance }
-	        );
-
-	        context.map().on('move.intro drawn.intro', function() {
-	            var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	            var box = pad(eleventhAvenueEnd, padding, context);
-	            reveal(box, helpString('intro.lines.retry_split'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-	            );
-	        });
+	    var ids = context.selectedIDs();
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	      context.enter(modeSelect(context, [_houseID]));
 	    }
 
-
-	    function didSplit() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
+	    context.history().checkpoint('hasHouse');
+	    context.on('exit.intro', function () {
+	      continueTo(rightClickHouse);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
+	        button: {
+	          html: icon('#iD-icon-close', 'inline')
 	        }
+	      }));
+	    }, 500);
 
-	        var ids = context.selectedIDs();
-	        var string = 'intro.lines.did_split_' + (ids.length > 1 ? 'multi' : 'single');
-	        var street = _t('intro.graph.name.washington-street');
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(twelfthAvenue, padding, context);
-	        box.width = box.width / 2;
-	        reveal(box, helpString(string, { street1: street, street2: street }),
-	            { duration: 500 }
-	        );
+	  function rightClickHouse() {
+	    if (!_houseID) return chapter.restart();
+	    context.enter(modeBrowse(context));
+	    context.history().reset('hasHouse');
+	    var zoom = context.map().zoom();
 
-	        timeout(function() {
-	            context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	    if (zoom < 20) {
+	      zoom = 20;
+	    }
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	                var box = pad(twelfthAvenue, padding, context);
-	                box.width = box.width / 2;
-	                reveal(box, helpString(string, { street1: street, street2: street }),
-	                    { duration: 0 }
-	                );
-	            });
-	        }, 600);  // after initial reveal and curtain cut
+	    context.map().centerZoomEase(house, zoom, 500);
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') return;
+	      var ids = context.selectedIDs();
+	      if (ids.length !== 1 || ids[0] !== _houseID) return;
+	      timeout(function () {
+	        var node = selectMenuItem(context, 'orthogonalize').node();
+	        if (!node) return;
+	        continueTo(clickSquare);
+	      }, 50); // after menu visible
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_building' : 'edit_menu_building_touch'));
+	      revealHouse(house, rightclickString, {
+	        duration: 0
+	      });
+	    });
+	    context.history().on('change.intro', function () {
+	      continueTo(rightClickHouse);
+	    });
 
-	        context.on('enter.intro', function() {
-	            var ids = context.selectedIDs();
-	            if (ids.length === 1 && ids[0] === _washingtonSegmentID) {
-	                continueTo(multiSelect);
-	            }
-	        });
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.history().on('change.intro', function() {
-	            if (!_washingtonSegmentID ||
-	                !context.hasEntity(_washingtonSegmentID) ||
-	                !context.hasEntity(washingtonStreetID) ||
-	                !context.hasEntity(twelfthAvenueID) ||
-	                !context.hasEntity(eleventhAvenueEndID)) {
-	                return continueTo(rightClickIntersection);
-	            }
-	        });
+	  function clickSquare() {
+	    if (!_houseID) return chapter.restart();
+	    var entity = context.hasEntity(_houseID);
+	    if (!entity) return continueTo(rightClickHouse);
+	    var node = selectMenuItem(context, 'orthogonalize').node();
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    if (!node) {
+	      return continueTo(rightClickHouse);
 	    }
 
+	    var wasChanged = false;
+	    reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
+	      padding: 50
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'browse') {
+	        continueTo(rightClickHouse);
+	      } else if (mode.id === 'move' || mode.id === 'rotate') {
+	        continueTo(retryClickSquare);
+	      }
+	    });
+	    context.map().on('move.intro', function () {
+	      var node = selectMenuItem(context, 'orthogonalize').node();
 
-	    function multiSelect() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
-	        }
+	      if (!wasChanged && !node) {
+	        return continueTo(rightClickHouse);
+	      }
 
-	        var ids = context.selectedIDs();
-	        var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
-	        var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;
+	      reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
+	        duration: 0,
+	        padding: 50
+	      });
+	    });
+	    context.history().on('change.intro', function () {
+	      wasChanged = true;
+	      context.history().on('change.intro', null); // Something changed.  Wait for transition to complete and check undo annotation.
 
-	        if (hasWashington && hasTwelfth) {
-	            return continueTo(multiRightClick);
-	        } else if (!hasWashington && !hasTwelfth) {
-	            return continueTo(didSplit);
+	      timeout(function () {
+	        if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature', {
+	          n: 1
+	        })) {
+	          continueTo(doneSquare);
+	        } else {
+	          continueTo(retryClickSquare);
 	        }
+	      }, 500); // after transitioned actions
+	    });
 
-	        context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        timeout(function() {
-	            var selected, other, padding, box;
-	            if (hasWashington) {
-	                selected = _t('intro.graph.name.washington-street');
-	                other = _t('intro.graph.name.12th-avenue');
-	                padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	                box = pad(twelfthAvenueEnd, padding, context);
-	                box.width *= 3;
-	            } else {
-	                selected = _t('intro.graph.name.12th-avenue');
-	                other = _t('intro.graph.name.washington-street');
-	                padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	                box = pad(twelfthAvenue, padding, context);
-	                box.width /= 2;
-	            }
+	  function retryClickSquare() {
+	    context.enter(modeBrowse(context));
+	    revealHouse(house, helpHtml('intro.buildings.retry_square'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(rightClickHouse);
+	      }
+	    });
 
-	            reveal(box,
-	                helpString('intro.lines.multi_select',
-	                    { selected: selected, other1: other }) + ' ' +
-	                helpString('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'),
-	                    { selected: selected, other2: other })
-	            );
-
-	            context.map().on('move.intro drawn.intro', function() {
-	                if (hasWashington) {
-	                    selected = _t('intro.graph.name.washington-street');
-	                    other = _t('intro.graph.name.12th-avenue');
-	                    padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	                    box = pad(twelfthAvenueEnd, padding, context);
-	                    box.width *= 3;
-	                } else {
-	                    selected = _t('intro.graph.name.12th-avenue');
-	                    other = _t('intro.graph.name.washington-street');
-	                    padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	                    box = pad(twelfthAvenue, padding, context);
-	                    box.width /= 2;
-	                }
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
+	  }
 
-	                reveal(box,
-	                    helpString('intro.lines.multi_select',
-	                        { selected: selected, other1: other }) + ' ' +
-	                    helpString('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'),
-	                        { selected: selected, other2: other }),
-	                    { duration: 0 }
-	                );
-	            });
+	  function doneSquare() {
+	    context.history().checkpoint('doneSquare');
+	    revealHouse(house, helpHtml('intro.buildings.done_square'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(addTank);
+	      }
+	    });
 
-	            context.on('enter.intro', function() {
-	                continueTo(multiSelect);
-	            });
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
+	  }
 
-	            context.history().on('change.intro', function() {
-	                if (!_washingtonSegmentID ||
-	                    !context.hasEntity(_washingtonSegmentID) ||
-	                    !context.hasEntity(washingtonStreetID) ||
-	                    !context.hasEntity(twelfthAvenueID) ||
-	                    !context.hasEntity(eleventhAvenueEndID)) {
-	                    return continueTo(rightClickIntersection);
-	                }
-	            });
-	        }, 600);
+	  function addTank() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('doneSquare');
+	    _tankID = null;
+	    var msec = transitionTime(tank, context.map().center());
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
+	    context.map().centerZoomEase(tank, 19.5, msec);
+	    timeout(function () {
+	      reveal('button.add-area', helpHtml('intro.buildings.add_tank'));
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'add-area') return;
+	        continueTo(startTank);
+	      });
+	    }, msec + 100);
 
-	    function multiRightClick() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
-	        }
-
-	        var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(twelfthAvenue, padding, context);
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var rightClickString = helpString('intro.lines.multi_select_success') +
-	            helpString('intro.lines.multi_' + (context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch'));
-	        reveal(box, rightClickString);
+	  function startTank() {
+	    if (context.mode().id !== 'add-area') {
+	      return continueTo(addTank);
+	    }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	            var box = pad(twelfthAvenue, padding, context);
-	            reveal(box, rightClickString, { duration: 0 });
+	    _tankID = null;
+	    timeout(function () {
+	      var startString = helpHtml('intro.buildings.start_tank') + helpHtml('intro.buildings.tank_edge_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
+	      revealTank(tank, startString);
+	      context.map().on('move.intro drawn.intro', function () {
+	        revealTank(tank, startString, {
+	          duration: 0
 	        });
+	      });
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'draw-area') return chapter.restart();
+	        continueTo(continueTank);
+	      });
+	    }, 550); // after easing
 
-	        context.ui().editMenu().on('toggled.intro', function(open) {
-	            if (!open) { return; }
-
-	            timeout(function() {
-	                var ids = context.selectedIDs();
-	                if (ids.length === 2 &&
-	                    ids.indexOf(twelfthAvenueID) !== -1 &&
-	                    ids.indexOf(_washingtonSegmentID) !== -1) {
-	                        var node = selectMenuItem(context, 'delete').node();
-	                        if (!node) { return; }
-	                        continueTo(multiDelete);
-	                } else if (ids.length === 1 &&
-	                    ids.indexOf(_washingtonSegmentID) !== -1) {
-	                    return continueTo(multiSelect);
-	                } else {
-	                    return continueTo(didSplit);
-	                }
-	            }, 300);  // after edit menu visible
-	        });
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.history().on('change.intro', function() {
-	            if (!_washingtonSegmentID ||
-	                !context.hasEntity(_washingtonSegmentID) ||
-	                !context.hasEntity(washingtonStreetID) ||
-	                !context.hasEntity(twelfthAvenueID) ||
-	                !context.hasEntity(eleventhAvenueEndID)) {
-	                return continueTo(rightClickIntersection);
-	            }
-	        });
+	  function continueTank() {
+	    if (context.mode().id !== 'draw-area') {
+	      return continueTo(addTank);
+	    }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.ui().editMenu().on('toggled.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    _tankID = null;
+	    var continueString = helpHtml('intro.buildings.continue_tank') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_tank');
+	    revealTank(tank, continueString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      revealTank(tank, continueString, {
+	        duration: 0
+	      });
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-area') {
+	        return;
+	      } else if (mode.id === 'select') {
+	        _tankID = context.selectedIDs()[0];
+	        return continueTo(searchPresetTank);
+	      } else {
+	        return continueTo(addTank);
+	      }
+	    });
+
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function searchPresetTank() {
+	    if (!_tankID || !context.hasEntity(_tankID)) {
+	      return addTank();
+	    }
 
-	    function multiDelete() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
-	        }
+	    var ids = context.selectedIDs();
 
-	        var node = selectMenuItem(context, 'delete').node();
-	        if (!node) { return continueTo(multiRightClick); }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+	      context.enter(modeSelect(context, [_tankID]));
+	    } // disallow scrolling
 
-	        reveal('.edit-menu',
-	            helpString('intro.lines.multi_delete'),
-	            { padding: 50 }
-	        );
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            reveal('.edit-menu',
-	                helpString('intro.lines.multi_delete'),
-	                { duration: 0, padding: 50 }
-	            );
-	        });
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	      reveal('.preset-search-input', helpHtml('intro.buildings.search_tank', {
+	        preset: tankPreset.name()
+	      }));
+	    }, 400); // after preset list pane visible..
 
-	        context.on('exit.intro', function() {
-	            if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
-	                return continueTo(multiSelect);  // left select mode but roads still exist
-	            }
-	        });
+	    context.on('enter.intro', function (mode) {
+	      if (!_tankID || !context.hasEntity(_tankID)) {
+	        return continueTo(addTank);
+	      }
 
-	        context.history().on('change.intro', function() {
-	            if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
-	                continueTo(retryDelete);         // changed something but roads still exist
-	            } else {
-	                continueTo(play);
-	            }
-	        });
+	      var ids = context.selectedIDs();
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _tankID) {
+	        // keep the user's area selected..
+	        context.enter(modeSelect(context, [_tankID])); // reset pane, in case user somehow happened to change it..
 
+	        context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
 
-	    function retryDelete() {
-	        context.enter(modeBrowse(context));
+	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	        context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	        reveal('.preset-search-input', helpHtml('intro.buildings.search_tank', {
+	          preset: tankPreset.name()
+	        }));
+	        context.history().on('change.intro', null);
+	      }
+	    });
 
-	        var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(twelfthAvenue, padding, context);
-	        reveal(box, helpString('intro.lines.retry_delete'), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(multiSelect); }
-	        });
+	    function checkPresetSearch() {
+	      var first = context.container().select('.preset-list-item:first-child');
 
-	        function continueTo(nextStep) {
-	            nextStep();
-	        }
+	      if (first.classed('preset-man_made-storage_tank')) {
+	        reveal(first.select('.preset-list-button').node(), helpHtml('intro.buildings.choose_tank', {
+	          preset: tankPreset.name()
+	        }), {
+	          duration: 300
+	        });
+	        context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+	        context.history().on('change.intro', function () {
+	          continueTo(closeEditorTank);
+	        });
+	      }
 	    }
 
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    function play() {
-	        dispatch$1.call('done');
-	        reveal('.ideditor',
-	            helpString('intro.lines.play', { next: _t('intro.buildings.title') }), {
-	                tooltipBox: '.intro-nav-wrap .chapter-building',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { reveal('.ideditor'); }
-	            }
-	        );
-	   }
+	  function closeEditorTank() {
+	    if (!_tankID || !context.hasEntity(_tankID)) {
+	      return addTank();
+	    }
 
+	    var ids = context.selectedIDs();
 
-	    chapter.enter = function() {
-	        addLine();
-	    };
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+	      context.enter(modeSelect(context, [_tankID]));
+	    }
 
+	    context.history().checkpoint('hasTank');
+	    context.on('exit.intro', function () {
+	      continueTo(rightClickTank);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
+	        button: {
+	          html: icon('#iD-icon-close', 'inline')
+	        }
+	      }));
+	    }, 500);
 
-	    chapter.exit = function() {
-	        timeouts.forEach(window.clearTimeout);
-	        select(window).on('pointerdown.intro mousedown.intro', null, true);
-	        context.on('enter.intro exit.intro', null);
-	        context.map().on('move.intro drawn.intro', null);
-	        context.history().on('change.intro', null);
-	        context.container().select('.inspector-wrap').on('wheel.intro', null);
-	        context.container().select('.preset-list-button').on('click.intro', null);
-	    };
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
+	  function rightClickTank() {
+	    if (!_tankID) return continueTo(addTank);
+	    context.enter(modeBrowse(context));
+	    context.history().reset('hasTank');
+	    context.map().centerEase(tank, 500);
+	    timeout(function () {
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'select') return;
+	        var ids = context.selectedIDs();
+	        if (ids.length !== 1 || ids[0] !== _tankID) return;
+	        timeout(function () {
+	          var node = selectMenuItem(context, 'circularize').node();
+	          if (!node) return;
+	          continueTo(clickCircle);
+	        }, 50); // after menu visible
+	      });
+	      var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_tank' : 'edit_menu_tank_touch'));
+	      revealTank(tank, rightclickString);
+	      context.map().on('move.intro drawn.intro', function () {
+	        revealTank(tank, rightclickString, {
+	          duration: 0
+	        });
+	      });
+	      context.history().on('change.intro', function () {
+	        continueTo(rightClickTank);
+	      });
+	    }, 600);
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
+	  function clickCircle() {
+	    if (!_tankID) return chapter.restart();
+	    var entity = context.hasEntity(_tankID);
+	    if (!entity) return continueTo(rightClickTank);
+	    var node = selectMenuItem(context, 'circularize').node();
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	    if (!node) {
+	      return continueTo(rightClickTank);
+	    }
 
-	function uiIntroBuilding(context, reveal) {
-	    var dispatch$1 = dispatch('done');
-	    var house = [-85.62815, 41.95638];
-	    var tank = [-85.62732, 41.95347];
-	    var buildingCatetory = _mainPresetIndex.item('category-building');
-	    var housePreset = _mainPresetIndex.item('building/house');
-	    var tankPreset = _mainPresetIndex.item('man_made/storage_tank');
-	    var timeouts = [];
-	    var _houseID = null;
-	    var _tankID = null;
-
-
-	    var chapter = {
-	        title: 'intro.buildings.title'
-	    };
+	    var wasChanged = false;
+	    reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
+	      padding: 50
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'browse') {
+	        continueTo(rightClickTank);
+	      } else if (mode.id === 'move' || mode.id === 'rotate') {
+	        continueTo(retryClickCircle);
+	      }
+	    });
+	    context.map().on('move.intro', function () {
+	      var node = selectMenuItem(context, 'circularize').node();
 
+	      if (!wasChanged && !node) {
+	        return continueTo(rightClickTank);
+	      }
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
-	    }
+	      reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
+	        duration: 0,
+	        padding: 50
+	      });
+	    });
+	    context.history().on('change.intro', function () {
+	      wasChanged = true;
+	      context.history().on('change.intro', null); // Something changed.  Wait for transition to complete and check undo annotation.
 
+	      timeout(function () {
+	        if (context.history().undoAnnotation() === _t('operations.circularize.annotation.feature', {
+	          n: 1
+	        })) {
+	          continueTo(play);
+	        } else {
+	          continueTo(retryClickCircle);
+	        }
+	      }, 500); // after transitioned actions
+	    });
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function retryClickCircle() {
+	    context.enter(modeBrowse(context));
+	    revealTank(tank, helpHtml('intro.buildings.retry_circle'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(rightClickTank);
+	      }
+	    });
 
-	    function revealHouse(center, text, options) {
-	        var padding = 160 * Math.pow(2, context.map().zoom() - 20);
-	        var box = pad(center, padding, context);
-	        reveal(box, text, options);
+	    function continueTo(nextStep) {
+	      nextStep();
 	    }
+	  }
 
+	  function play() {
+	    dispatch.call('done');
+	    reveal('.ideditor', helpHtml('intro.buildings.play', {
+	      next: _t('intro.startediting.title')
+	    }), {
+	      tooltipBox: '.intro-nav-wrap .chapter-startEditing',
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        reveal('.ideditor');
+	      }
+	    });
+	  }
 
-	    function revealTank(center, text, options) {
-	        var padding = 190 * Math.pow(2, context.map().zoom() - 19.5);
-	        var box = pad(center, padding, context);
-	        reveal(box, text, options);
-	    }
+	  chapter.enter = function () {
+	    addHouse();
+	  };
 
+	  chapter.exit = function () {
+	    timeouts.forEach(window.clearTimeout);
+	    context.on('enter.intro exit.intro', null);
+	    context.map().on('move.intro drawn.intro', null);
+	    context.history().on('change.intro', null);
+	    context.container().select('.inspector-wrap').on('wheel.intro', null);
+	    context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	    context.container().select('.more-fields .combobox-input').on('click.intro', null);
+	  };
 
-	    function addHouse() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
-	        _houseID = null;
-
-	        var msec = transitionTime(house, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(house, 19, msec);
-
-	        timeout(function() {
-	            var tooltip = reveal('button.add-area',
-	                helpString('intro.buildings.add_building'));
-
-	            tooltip.selectAll('.popover-inner')
-	                .insert('svg', 'span')
-	                .attr('class', 'tooltip-illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-graphic-buildings');
-
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-area') { return; }
-	                continueTo(startHouse);
-	            });
-	        }, msec + 100);
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
+	function uiIntroStartEditing(context, reveal) {
+	  var dispatch = dispatch$8('done', 'startEditing');
+	  var modalSelection = select(null);
+	  var chapter = {
+	    title: 'intro.startediting.title'
+	  };
 
-	    function startHouse() {
-	        if (context.mode().id !== 'add-area') {
-	            return continueTo(addHouse);
-	        }
+	  function showHelp() {
+	    reveal('.map-control.help-control', helpHtml('intro.startediting.help'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        shortcuts();
+	      }
+	    });
+	  }
 
-	        _houseID = null;
-	        context.map().zoomEase(20, 500);
+	  function shortcuts() {
+	    reveal('.map-control.help-control', helpHtml('intro.startediting.shortcuts'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        showSave();
+	      }
+	    });
+	  }
 
-	        timeout(function() {
-	            var startString = helpString('intro.buildings.start_building') +
-	                helpString('intro.buildings.building_corner_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
-	            revealHouse(house, startString);
+	  function showSave() {
+	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealHouse(house, startString, { duration: 0 });
-	            });
+	    reveal('.top-toolbar button.save', helpHtml('intro.startediting.save'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        showStart();
+	      }
+	    });
+	  }
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'draw-area') { return chapter.restart(); }
-	                continueTo(continueHouse);
-	            });
+	  function showStart() {
+	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
-	        }, 550);  // after easing
+	    modalSelection = uiModal(context.container());
+	    modalSelection.select('.modal').attr('class', 'modal-splash modal');
+	    modalSelection.selectAll('.close').remove();
+	    var startbutton = modalSelection.select('.content').attr('class', 'fillL').append('button').attr('class', 'modal-section huge-modal-button').on('click', function () {
+	      modalSelection.remove();
+	    });
+	    startbutton.append('svg').attr('class', 'illustration').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+	    startbutton.append('h2').call(_t.append('intro.startediting.start'));
+	    dispatch.call('startEditing');
+	  }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	  chapter.enter = function () {
+	    showHelp();
+	  };
 
+	  chapter.exit = function () {
+	    modalSelection.remove();
+	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+	  };
 
-	    function continueHouse() {
-	        if (context.mode().id !== 'draw-area') {
-	            return continueTo(addHouse);
-	        }
+	  return utilRebind(chapter, dispatch, 'on');
+	}
 
-	        _houseID = null;
+	var chapterUi = {
+	  welcome: uiIntroWelcome,
+	  navigation: uiIntroNavigation,
+	  point: uiIntroPoint,
+	  area: uiIntroArea,
+	  line: uiIntroLine,
+	  building: uiIntroBuilding,
+	  startEditing: uiIntroStartEditing
+	};
+	var chapterFlow = ['welcome', 'navigation', 'point', 'area', 'line', 'building', 'startEditing'];
+	function uiIntro(context) {
+	  var INTRO_IMAGERY = 'EsriWorldImageryClarity';
+	  var _introGraph = {};
 
-	        var continueString = helpString('intro.buildings.continue_building') + '{br}' +
-	            helpString('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.buildings.finish_building');
+	  var _currChapter;
 
-	        revealHouse(house, continueString);
+	  function intro(selection) {
+	    _mainFileFetcher.get('intro_graph').then(function (dataIntroGraph) {
+	      // create entities for intro graph and localize names
+	      for (var id in dataIntroGraph) {
+	        if (!_introGraph[id]) {
+	          _introGraph[id] = osmEntity(localize(dataIntroGraph[id]));
+	        }
+	      }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            revealHouse(house, continueString, { duration: 0 });
-	        });
+	      selection.call(startIntro);
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  }
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-area') {
-	                return;
-	            } else if (mode.id === 'select') {
-	                var graph = context.graph();
-	                var way = context.entity(context.selectedIDs()[0]);
-	                var nodes = graph.childNodes(way);
-	                var points = utilArrayUniq(nodes)
-	                    .map(function(n) { return context.projection(n.loc); });
-
-	                if (isMostlySquare(points)) {
-	                    _houseID = way.id;
-	                    return continueTo(chooseCategoryBuilding);
-	                } else {
-	                    return continueTo(retryHouse);
-	                }
+	  function startIntro(selection) {
+	    context.enter(modeBrowse(context)); // Save current map state
 
-	            } else {
-	                return chapter.restart();
-	            }
-	        });
+	    var osm = context.connection();
+	    var history = context.history().toJSON();
+	    var hash = window.location.hash;
+	    var center = context.map().center();
+	    var zoom = context.map().zoom();
+	    var background = context.background().baseLayerSource();
+	    var overlays = context.background().overlayLayerSources();
+	    var opacity = context.container().selectAll('.main-map .layer-background').style('opacity');
+	    var caches = osm && osm.caches();
+	    var baseEntities = context.history().graph().base().entities; // Show sidebar and disable the sidebar resizing button
+	    // (this needs to be before `context.inIntro(true)`)
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	    context.ui().sidebar.expand();
+	    context.container().selectAll('button.sidebar-toggle').classed('disabled', true); // Block saving
 
+	    context.inIntro(true); // Load semi-real data used in intro
 
-	    function retryHouse() {
-	        var onClick = function() { continueTo(addHouse); };
+	    if (osm) {
+	      osm.toggle(false).reset();
+	    }
 
-	        revealHouse(house, helpString('intro.buildings.retry_building'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	    context.history().reset();
+	    context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
+	    context.history().checkpoint('initial'); // Setup imagery
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            revealHouse(house, helpString('intro.buildings.retry_building'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	    var imagery = context.background().findSource(INTRO_IMAGERY);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
+	    if (imagery) {
+	      context.background().baseLayerSource(imagery);
+	    } else {
+	      context.background().bing();
 	    }
 
+	    overlays.forEach(function (d) {
+	      return context.background().toggleOverlayLayer(d);
+	    }); // Setup data layers (only OSM)
 
-	    function chooseCategoryBuilding() {
-	        if (!_houseID || !context.hasEntity(_houseID)) {
-	            return addHouse();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	            context.enter(modeSelect(context, [_houseID]));
-	        }
+	    var layers = context.layers();
+	    layers.all().forEach(function (item) {
+	      // if the layer has the function `enabled`
+	      if (typeof item.layer.enabled === 'function') {
+	        item.layer.enabled(item.id === 'osm');
+	      }
+	    });
+	    context.container().selectAll('.main-map .layer-background').style('opacity', 1);
+	    var curtain = uiCurtain(context.container().node());
+	    selection.call(curtain); // Store that the user started the walkthrough..
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    corePreferences('walkthrough_started', 'yes'); // Restore previous walkthrough progress..
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	    var storedProgress = corePreferences('walkthrough_progress') || '';
+	    var progress = storedProgress.split(';').filter(Boolean);
+	    var chapters = chapterFlow.map(function (chapter, i) {
+	      var s = chapterUi[chapter](context, curtain.reveal).on('done', function () {
+	        buttons.filter(function (d) {
+	          return d.title === s.title;
+	        }).classed('finished', true);
 
-	            var button = context.container().select('.preset-category-building .preset-list-button');
+	        if (i < chapterFlow.length - 1) {
+	          var next = chapterFlow[i + 1];
+	          context.container().select("button.chapter-".concat(next)).classed('next', true);
+	        } // Store walkthrough progress..
 
-	            reveal(button.node(),
-	                helpString('intro.buildings.choose_category_building', { category: buildingCatetory.name() })
-	            );
 
-	            button.on('click.intro', function() {
-	                button.on('click.intro', null);
-	                continueTo(choosePresetHouse);
-	            });
+	        progress.push(chapter);
+	        corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
+	      });
+	      return s;
+	    });
+	    chapters[chapters.length - 1].on('startEditing', function () {
+	      // Store walkthrough progress..
+	      progress.push('startEditing');
+	      corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';')); // Store if walkthrough is completed..
 
-	        }, 400);  // after preset list pane visible..
+	      var incomplete = utilArrayDifference(chapterFlow, progress);
 
+	      if (!incomplete.length) {
+	        corePreferences('walkthrough_completed', 'yes');
+	      }
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_houseID || !context.hasEntity(_houseID)) {
-	                return continueTo(addHouse);
-	            }
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	                return continueTo(chooseCategoryBuilding);
-	            }
-	        });
+	      curtain.remove();
+	      navwrap.remove();
+	      context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
+	      context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	      if (osm) {
+	        osm.toggle(true).reset().caches(caches);
+	      }
 
+	      context.history().reset().merge(Object.values(baseEntities));
+	      context.background().baseLayerSource(background);
+	      overlays.forEach(function (d) {
+	        return context.background().toggleOverlayLayer(d);
+	      });
 
-	    function choosePresetHouse() {
-	        if (!_houseID || !context.hasEntity(_houseID)) {
-	            return addHouse();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	            context.enter(modeSelect(context, [_houseID]));
-	        }
+	      if (history) {
+	        context.history().fromJSON(history, false);
+	      }
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	      context.map().centerZoom(center, zoom);
+	      window.location.replace(hash);
+	      context.inIntro(false);
+	    });
+	    var navwrap = selection.append('div').attr('class', 'intro-nav-wrap fillD');
+	    navwrap.append('svg').attr('class', 'intro-nav-wrap-logo').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+	    var buttonwrap = navwrap.append('div').attr('class', 'joined').selectAll('button.chapter');
+	    var buttons = buttonwrap.data(chapters).enter().append('button').attr('class', function (d, i) {
+	      return "chapter chapter-".concat(chapterFlow[i]);
+	    }).on('click', enterChapter);
+	    buttons.append('span').html(function (d) {
+	      return _t.html(d.title);
+	    });
+	    buttons.append('span').attr('class', 'status').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline'));
+	    enterChapter(null, chapters[0]);
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	    function enterChapter(d3_event, newChapter) {
+	      if (_currChapter) {
+	        _currChapter.exit();
+	      }
 
-	            var button = context.container().select('.preset-building-house .preset-list-button');
+	      context.enter(modeBrowse(context));
+	      _currChapter = newChapter;
 
-	            reveal(button.node(),
-	                helpString('intro.buildings.choose_preset_house', { preset: housePreset.name() }),
-	                { duration: 300 }
-	            );
+	      _currChapter.enter();
 
-	            button.on('click.intro', function() {
-	                button.on('click.intro', null);
-	                continueTo(closeEditorHouse);
-	            });
+	      buttons.classed('next', false).classed('active', function (d) {
+	        return d.title === _currChapter.title;
+	      });
+	    }
+	  }
 
-	        }, 400);  // after preset list pane visible..
+	  return intro;
+	}
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_houseID || !context.hasEntity(_houseID)) {
-	                return continueTo(addHouse);
-	            }
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	                return continueTo(chooseCategoryBuilding);
-	            }
-	        });
+	function uiIssuesInfo(context) {
+	  var warningsItem = {
+	    id: 'warnings',
+	    count: 0,
+	    iconID: 'iD-icon-alert',
+	    descriptionID: 'issues.warnings_and_errors'
+	  };
+	  var resolvedItem = {
+	    id: 'resolved',
+	    count: 0,
+	    iconID: 'iD-icon-apply',
+	    descriptionID: 'issues.user_resolved_issues'
+	  };
+
+	  function update(selection) {
+	    var shownItems = [];
+	    var liveIssues = context.validator().getIssues({
+	      what: corePreferences('validate-what') || 'edited',
+	      where: corePreferences('validate-where') || 'all'
+	    });
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    if (liveIssues.length) {
+	      warningsItem.count = liveIssues.length;
+	      shownItems.push(warningsItem);
 	    }
 
+	    if (corePreferences('validate-what') === 'all') {
+	      var resolvedIssues = context.validator().getResolvedIssues();
 
-	    function closeEditorHouse() {
-	        if (!_houseID || !context.hasEntity(_houseID)) {
-	            return addHouse();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	            context.enter(modeSelect(context, [_houseID]));
-	        }
+	      if (resolvedIssues.length) {
+	        resolvedItem.count = resolvedIssues.length;
+	        shownItems.push(resolvedItem);
+	      }
+	    }
 
-	        context.history().checkpoint('hasHouse');
+	    var chips = selection.selectAll('.chip').data(shownItems, function (d) {
+	      return d.id;
+	    });
+	    chips.exit().remove();
+	    var enter = chips.enter().append('a').attr('class', function (d) {
+	      return 'chip ' + d.id + '-count';
+	    }).attr('href', '#').each(function (d) {
+	      var chipSelection = select(this);
+	      var tooltipBehavior = uiTooltip().placement('top').title(_t.html(d.descriptionID));
+	      chipSelection.call(tooltipBehavior).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        tooltipBehavior.hide(select(this)); // open the Issues pane
+
+	        context.ui().togglePanes(context.container().select('.map-panes .issues-pane'));
+	      });
+	      chipSelection.call(svgIcon('#' + d.iconID));
+	    });
+	    enter.append('span').attr('class', 'count');
+	    enter.merge(chips).selectAll('span.count').text(function (d) {
+	      return d.count.toString();
+	    });
+	  }
 
-	        context.on('exit.intro', function() {
-	            continueTo(rightClickHouse);
-	        });
+	  return function (selection) {
+	    update(selection);
+	    context.validator().on('validated.infobox', function () {
+	      update(selection);
+	    });
+	  };
+	}
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane',
-	                helpString('intro.buildings.close', { button: icon('#iD-icon-close', 'pre-text') })
-	            );
-	        }, 500);
+	function uiMapInMap(context) {
+	  function mapInMap(selection) {
+	    var backgroundLayer = rendererTileLayer(context);
+	    var overlayLayers = {};
+	    var projection = geoRawMercator();
+	    var dataLayer = svgData(projection, context).showLabels(false);
+	    var debugLayer = svgDebug(projection, context);
+	    var zoom = d3_zoom().scaleExtent([geoZoomToScale(0.5), geoZoomToScale(24)]).on('start', zoomStarted).on('zoom', zoomed).on('end', zoomEnded);
+	    var wrap = select(null);
+	    var tiles = select(null);
+	    var viewport = select(null);
+	    var _isTransformed = false;
+	    var _isHidden = true;
+	    var _skipEvents = false;
+	    var _gesture = null;
+	    var _zDiff = 6; // by default, minimap renders at (main zoom - 6)
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
-	    }
+	    var _dMini; // dimensions of minimap
 
 
-	    function rightClickHouse() {
-	        if (!_houseID) { return chapter.restart(); }
+	    var _cMini; // center pixel of minimap
 
-	        context.enter(modeBrowse(context));
-	        context.history().reset('hasHouse');
-	        var zoom = context.map().zoom();
-	        if (zoom < 20) {
-	            zoom = 20;
-	        }
-	        context.map().centerZoomEase(house, zoom, 500);
-
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') { return; }
-	            var ids = context.selectedIDs();
-	            if (ids.length !== 1 || ids[0] !== _houseID) { return; }
-
-	            timeout(function() {
-	                var node = selectMenuItem(context, 'orthogonalize').node();
-	                if (!node) { return; }
-	                continueTo(clickSquare);
-	            }, 50);  // after menu visible
-	        });
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var rightclickString = helpString('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_building' : 'edit_menu_building_touch'));
-	            revealHouse(house, rightclickString, { duration: 0 });
-	        });
+	    var _tStart; // transform at start of gesture
 
-	        context.history().on('change.intro', function() {
-	            continueTo(rightClickHouse);
-	        });
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	    var _tCurr; // transform at most recent event
 
 
-	    function clickSquare() {
-	        if (!_houseID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_houseID);
-	        if (!entity) { return continueTo(rightClickHouse); }
+	    var _timeoutID;
 
-	        var node = selectMenuItem(context, 'orthogonalize').node();
-	        if (!node) { return continueTo(rightClickHouse); }
+	    function zoomStarted() {
+	      if (_skipEvents) return;
+	      _tStart = _tCurr = projection.transform();
+	      _gesture = null;
+	    }
 
-	        var wasChanged = false;
+	    function zoomed(d3_event) {
+	      if (_skipEvents) return;
+	      var x = d3_event.transform.x;
+	      var y = d3_event.transform.y;
+	      var k = d3_event.transform.k;
+	      var isZooming = k !== _tStart.k;
+	      var isPanning = x !== _tStart.x || y !== _tStart.y;
 
-	        reveal('.edit-menu',
-	            helpString('intro.buildings.square_building'),
-	            { padding: 50 }
-	        );
+	      if (!isZooming && !isPanning) {
+	        return; // no change
+	      } // lock in either zooming or panning, don't allow both in minimap.
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'browse') {
-	                continueTo(rightClickHouse);
-	            } else if (mode.id === 'move' || mode.id === 'rotate') {
-	                continueTo(retryClickSquare);
-	            }
-	        });
 
-	        context.map().on('move.intro', function() {
-	            var node = selectMenuItem(context, 'orthogonalize').node();
-	            if (!wasChanged && !node) { return continueTo(rightClickHouse); }
+	      if (!_gesture) {
+	        _gesture = isZooming ? 'zoom' : 'pan';
+	      }
 
-	            reveal('.edit-menu',
-	                helpString('intro.buildings.square_building'),
-	                { duration: 0, padding: 50 }
-	            );
-	        });
+	      var tMini = projection.transform();
+	      var tX, tY, scale;
 
-	        context.history().on('change.intro', function() {
-	            wasChanged = true;
-	            context.history().on('change.intro', null);
+	      if (_gesture === 'zoom') {
+	        scale = k / tMini.k;
+	        tX = (_cMini[0] / scale - _cMini[0]) * scale;
+	        tY = (_cMini[1] / scale - _cMini[1]) * scale;
+	      } else {
+	        k = tMini.k;
+	        scale = 1;
+	        tX = x - tMini.x;
+	        tY = y - tMini.y;
+	      }
 
-	            // Something changed.  Wait for transition to complete and check undo annotation.
-	            timeout(function() {
-	                if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature.single')) {
-	                    continueTo(doneSquare);
-	                } else {
-	                    continueTo(retryClickSquare);
-	                }
-	            }, 500);  // after transitioned actions
-	        });
+	      utilSetTransform(tiles, tX, tY, scale);
+	      utilSetTransform(viewport, 0, 0, scale);
+	      _isTransformed = true;
+	      _tCurr = identity$2.translate(x, y).scale(k);
+	      var zMain = geoScaleToZoom(context.projection.scale());
+	      var zMini = geoScaleToZoom(k);
+	      _zDiff = zMain - zMini;
+	      queueRedraw();
+	    }
+
+	    function zoomEnded() {
+	      if (_skipEvents) return;
+	      if (_gesture !== 'pan') return;
+	      updateProjection();
+	      _gesture = null;
+	      context.map().center(projection.invert(_cMini)); // recenter main map..
+	    }
+
+	    function updateProjection() {
+	      var loc = context.map().center();
+	      var tMain = context.projection.transform();
+	      var zMain = geoScaleToZoom(tMain.k);
+	      var zMini = Math.max(zMain - _zDiff, 0.5);
+	      var kMini = geoZoomToScale(zMini);
+	      projection.translate([tMain.x, tMain.y]).scale(kMini);
+	      var point = projection(loc);
+	      var mouse = _gesture === 'pan' ? geoVecSubtract([_tCurr.x, _tCurr.y], [_tStart.x, _tStart.y]) : [0, 0];
+	      var xMini = _cMini[0] - point[0] + tMain.x + mouse[0];
+	      var yMini = _cMini[1] - point[1] + tMain.y + mouse[1];
+	      projection.translate([xMini, yMini]).clipExtent([[0, 0], _dMini]);
+	      _tCurr = projection.transform();
+
+	      if (_isTransformed) {
+	        utilSetTransform(tiles, 0, 0);
+	        utilSetTransform(viewport, 0, 0);
+	        _isTransformed = false;
+	      }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	      zoom.scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
+	      _skipEvents = true;
+	      wrap.call(zoom.transform, _tCurr);
+	      _skipEvents = false;
 	    }
 
+	    function redraw() {
+	      clearTimeout(_timeoutID);
+	      if (_isHidden) return;
+	      updateProjection();
+	      var zMini = geoScaleToZoom(projection.scale()); // setup tile container
 
-	    function retryClickSquare() {
-	        context.enter(modeBrowse(context));
+	      tiles = wrap.selectAll('.map-in-map-tiles').data([0]);
+	      tiles = tiles.enter().append('div').attr('class', 'map-in-map-tiles').merge(tiles); // redraw background
 
-	        revealHouse(house, helpString('intro.buildings.retry_square'), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(rightClickHouse); }
-	        });
+	      backgroundLayer.source(context.background().baseLayerSource()).projection(projection).dimensions(_dMini);
+	      var background = tiles.selectAll('.map-in-map-background').data([0]);
+	      background.enter().append('div').attr('class', 'map-in-map-background').merge(background).call(backgroundLayer); // redraw overlay
 
-	        function continueTo(nextStep) {
-	            nextStep();
+	      var overlaySources = context.background().overlayLayerSources();
+	      var activeOverlayLayers = [];
+
+	      for (var i = 0; i < overlaySources.length; i++) {
+	        if (overlaySources[i].validZoom(zMini)) {
+	          if (!overlayLayers[i]) overlayLayers[i] = rendererTileLayer(context);
+	          activeOverlayLayers.push(overlayLayers[i].source(overlaySources[i]).projection(projection).dimensions(_dMini));
 	        }
+	      }
+
+	      var overlay = tiles.selectAll('.map-in-map-overlay').data([0]);
+	      overlay = overlay.enter().append('div').attr('class', 'map-in-map-overlay').merge(overlay);
+	      var overlays = overlay.selectAll('div').data(activeOverlayLayers, function (d) {
+	        return d.source().name();
+	      });
+	      overlays.exit().remove();
+	      overlays = overlays.enter().append('div').merge(overlays).each(function (layer) {
+	        select(this).call(layer);
+	      });
+	      var dataLayers = tiles.selectAll('.map-in-map-data').data([0]);
+	      dataLayers.exit().remove();
+	      dataLayers = dataLayers.enter().append('svg').attr('class', 'map-in-map-data').merge(dataLayers).call(dataLayer).call(debugLayer); // redraw viewport bounding box
+
+	      if (_gesture !== 'pan') {
+	        var getPath = d3_geoPath(projection);
+	        var bbox = {
+	          type: 'Polygon',
+	          coordinates: [context.map().extent().polygon()]
+	        };
+	        viewport = wrap.selectAll('.map-in-map-viewport').data([0]);
+	        viewport = viewport.enter().append('svg').attr('class', 'map-in-map-viewport').merge(viewport);
+	        var path = viewport.selectAll('.map-in-map-bbox').data([bbox]);
+	        path.enter().append('path').attr('class', 'map-in-map-bbox').merge(path).attr('d', getPath).classed('thick', function (d) {
+	          return getPath.area(d) < 30;
+	        });
+	      }
 	    }
 
+	    function queueRedraw() {
+	      clearTimeout(_timeoutID);
+	      _timeoutID = setTimeout(function () {
+	        redraw();
+	      }, 750);
+	    }
 
-	    function doneSquare() {
-	        context.history().checkpoint('doneSquare');
+	    function toggle(d3_event) {
+	      if (d3_event) d3_event.preventDefault();
+	      _isHidden = !_isHidden;
+	      context.container().select('.minimap-toggle-item').classed('active', !_isHidden).select('input').property('checked', !_isHidden);
 
-	        revealHouse(house, helpString('intro.buildings.done_square'), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(addTank); }
+	      if (_isHidden) {
+	        wrap.style('display', 'block').style('opacity', '1').transition().duration(200).style('opacity', '0').on('end', function () {
+	          selection.selectAll('.map-in-map').style('display', 'none');
 	        });
-
-	        function continueTo(nextStep) {
-	            nextStep();
-	        }
+	      } else {
+	        wrap.style('display', 'block').style('opacity', '0').transition().duration(200).style('opacity', '1').on('end', function () {
+	          redraw();
+	        });
+	      }
 	    }
 
+	    uiMapInMap.toggle = toggle;
+	    wrap = selection.selectAll('.map-in-map').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'map-in-map').style('display', _isHidden ? 'none' : 'block').call(zoom).on('dblclick.zoom', null).merge(wrap); // reflow warning: Hardcode dimensions - currently can't resize it anyway..
 
-	    function addTank() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('doneSquare');
-	        _tankID = null;
+	    _dMini = [200, 150]; //utilGetDimensions(wrap);
 
-	        var msec = transitionTime(tank, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(tank, 19.5, msec);
+	    _cMini = geoVecScale(_dMini, 0.5);
+	    context.map().on('drawn.map-in-map', function (drawn) {
+	      if (drawn.full === true) {
+	        redraw();
+	      }
+	    });
+	    redraw();
+	    context.keybinding().on(_t('background.minimap.key'), toggle);
+	  }
 
-	        timeout(function() {
-	            reveal('button.add-area',
-	                helpString('intro.buildings.add_tank')
-	            );
+	  return mapInMap;
+	}
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-area') { return; }
-	                continueTo(startTank);
-	            });
-	        }, msec + 100);
+	function uiNotice(context) {
+	  return function (selection) {
+	    var div = selection.append('div').attr('class', 'notice');
+	    var button = div.append('button').attr('class', 'zoom-to notice fillD').on('click', function () {
+	      context.map().zoomEase(context.minEditableZoom());
+	    }).on('wheel', function (d3_event) {
+	      // let wheel events pass through #4482
+	      var e2 = new WheelEvent(d3_event.type, d3_event);
+	      context.surface().node().dispatchEvent(e2);
+	    });
+	    button.call(svgIcon('#iD-icon-plus', 'pre-text')).append('span').attr('class', 'label').call(_t.append('zoom_in_edit'));
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    function disableTooHigh() {
+	      var canEdit = context.map().zoom() >= context.minEditableZoom();
+	      div.style('display', canEdit ? 'none' : 'block');
 	    }
 
+	    context.map().on('move.notice', debounce(disableTooHigh, 500));
+	    disableTooHigh();
+	  };
+	}
 
-	    function startTank() {
-	        if (context.mode().id !== 'add-area') {
-	            return continueTo(addTank);
-	        }
-
-	        _tankID = null;
-
-	        timeout(function() {
-	            var startString = helpString('intro.buildings.start_tank') +
-	                helpString('intro.buildings.tank_edge_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
-	            revealTank(tank, startString);
+	function uiPhotoviewer(context) {
+	  var dispatch = dispatch$8('resize');
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealTank(tank, startString, { duration: 0 });
-	            });
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'draw-area') { return chapter.restart(); }
-	                continueTo(continueTank);
-	            });
+	  function photoviewer(selection) {
+	    selection.append('button').attr('class', 'thumb-hide').attr('title', _t('icons.close')).on('click', function () {
+	      if (services.streetside) {
+	        services.streetside.hideViewer(context);
+	      }
 
-	        }, 550);  // after easing
+	      if (services.mapillary) {
+	        services.mapillary.hideViewer(context);
+	      }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	      if (services.kartaview) {
+	        services.kartaview.hideViewer(context);
+	      }
+	    }).append('div').call(svgIcon('#iD-icon-close'));
+
+	    function preventDefault(d3_event) {
+	      d3_event.preventDefault();
+	    }
+
+	    selection.append('button').attr('class', 'resize-handle-xy').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
+	      resizeOnX: true,
+	      resizeOnY: true
+	    }));
+	    selection.append('button').attr('class', 'resize-handle-x').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
+	      resizeOnX: true
+	    }));
+	    selection.append('button').attr('class', 'resize-handle-y').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
+	      resizeOnY: true
+	    }));
+
+	    function buildResizeListener(target, eventName, dispatch, options) {
+	      var resizeOnX = !!options.resizeOnX;
+	      var resizeOnY = !!options.resizeOnY;
+	      var minHeight = options.minHeight || 240;
+	      var minWidth = options.minWidth || 320;
+	      var pointerId;
+	      var startX;
+	      var startY;
+	      var startWidth;
+	      var startHeight;
+
+	      function startResize(d3_event) {
+	        if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        var mapSize = context.map().dimensions();
+
+	        if (resizeOnX) {
+	          var maxWidth = mapSize[0];
+	          var newWidth = clamp(startWidth + d3_event.clientX - startX, minWidth, maxWidth);
+	          target.style('width', newWidth + 'px');
+	        }
+
+	        if (resizeOnY) {
+	          var maxHeight = mapSize[1] - 90; // preserve space at top/bottom of map
+
+	          var newHeight = clamp(startHeight + startY - d3_event.clientY, minHeight, maxHeight);
+	          target.style('height', newHeight + 'px');
+	        }
+
+	        dispatch.call(eventName, target, utilGetDimensions(target, true));
+	      }
 
+	      function clamp(num, min, max) {
+	        return Math.max(min, Math.min(num, max));
+	      }
 
-	    function continueTank() {
-	        if (context.mode().id !== 'draw-area') {
-	            return continueTo(addTank);
-	        }
+	      function stopResize(d3_event) {
+	        if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation(); // remove all the listeners we added
 
-	        _tankID = null;
+	        select(window).on('.' + eventName, null);
+	      }
 
-	        var continueString = helpString('intro.buildings.continue_tank') + '{br}' +
-	            helpString('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.buildings.finish_tank');
+	      return function initResize(d3_event) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        pointerId = d3_event.pointerId || 'mouse';
+	        startX = d3_event.clientX;
+	        startY = d3_event.clientY;
+	        var targetRect = target.node().getBoundingClientRect();
+	        startWidth = targetRect.width;
+	        startHeight = targetRect.height;
+	        select(window).on(_pointerPrefix + 'move.' + eventName, startResize, false).on(_pointerPrefix + 'up.' + eventName, stopResize, false);
 
-	        revealTank(tank, continueString);
+	        if (_pointerPrefix === 'pointer') {
+	          select(window).on('pointercancel.' + eventName, stopResize, false);
+	        }
+	      };
+	    }
+	  }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            revealTank(tank, continueString, { duration: 0 });
-	        });
+	  photoviewer.onMapResize = function () {
+	    var photoviewer = context.container().select('.photoviewer');
+	    var content = context.container().select('.main-content');
+	    var mapDimensions = utilGetDimensions(content, true); // shrink photo viewer if it is too big
+	    // (-90 preserves space at top and bottom of map used by menus)
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-area') {
-	                return;
-	            } else if (mode.id === 'select') {
-	                _tankID = context.selectedIDs()[0];
-	                return continueTo(searchPresetTank);
-	            } else {
-	                return continueTo(addTank);
-	            }
-	        });
+	    var photoDimensions = utilGetDimensions(photoviewer, true);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    if (photoDimensions[0] > mapDimensions[0] || photoDimensions[1] > mapDimensions[1] - 90) {
+	      var setPhotoDimensions = [Math.min(photoDimensions[0], mapDimensions[0]), Math.min(photoDimensions[1], mapDimensions[1] - 90)];
+	      photoviewer.style('width', setPhotoDimensions[0] + 'px').style('height', setPhotoDimensions[1] + 'px');
+	      dispatch.call('resize', photoviewer, setPhotoDimensions);
 	    }
+	  };
 
+	  return utilRebind(photoviewer, dispatch, 'on');
+	}
 
-	    function searchPresetTank() {
-	        if (!_tankID || !context.hasEntity(_tankID)) {
-	            return addTank();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-	            context.enter(modeSelect(context, [_tankID]));
-	        }
+	function uiRestore(context) {
+	  return function (selection) {
+	    if (!context.history().hasRestorableChanges()) return;
+	    var modalSelection = uiModal(selection, true);
+	    modalSelection.select('.modal').attr('class', 'modal fillL');
+	    var introModal = modalSelection.select('.content');
+	    introModal.append('div').attr('class', 'modal-section').append('h3').call(_t.append('restore.heading'));
+	    introModal.append('div').attr('class', 'modal-section').append('p').call(_t.append('restore.description'));
+	    var buttonWrap = introModal.append('div').attr('class', 'modal-actions');
+	    var restore = buttonWrap.append('button').attr('class', 'restore').on('click', function () {
+	      context.history().restore();
+	      modalSelection.remove();
+	    });
+	    restore.append('svg').attr('class', 'logo logo-restore').append('use').attr('xlink:href', '#iD-logo-restore');
+	    restore.append('div').call(_t.append('restore.restore'));
+	    var reset = buttonWrap.append('button').attr('class', 'reset').on('click', function () {
+	      context.history().clearSaved();
+	      modalSelection.remove();
+	    });
+	    reset.append('svg').attr('class', 'logo logo-reset').append('use').attr('xlink:href', '#iD-logo-reset');
+	    reset.append('div').call(_t.append('restore.reset'));
+	    restore.node().focus();
+	  };
+	}
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	function uiScale(context) {
+	  var projection = context.projection,
+	      isImperial = !_mainLocalizer.usesMetric(),
+	      maxLength = 180,
+	      tickHeight = 8;
+
+	  function scaleDefs(loc1, loc2) {
+	    var lat = (loc2[1] + loc1[1]) / 2,
+	        conversion = isImperial ? 3.28084 : 1,
+	        dist = geoLonToMeters(loc2[0] - loc1[0], lat) * conversion,
+	        scale = {
+	      dist: 0,
+	      px: 0,
+	      text: ''
+	    },
+	        buckets,
+	        i,
+	        val,
+	        dLon;
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	    if (isImperial) {
+	      buckets = [5280000, 528000, 52800, 5280, 500, 50, 5, 1];
+	    } else {
+	      buckets = [5000000, 500000, 50000, 5000, 500, 50, 5, 1];
+	    } // determine a user-friendly endpoint for the scale
 
-	            context.container().select('.preset-search-input')
-	                .on('keydown.intro', null)
-	                .on('keyup.intro', checkPresetSearch);
 
-	            reveal('.preset-search-input',
-	                helpString('intro.buildings.search_tank', { preset: tankPreset.name() })
-	            );
-	        }, 400);  // after preset list pane visible..
+	    for (i = 0; i < buckets.length; i++) {
+	      val = buckets[i];
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_tankID || !context.hasEntity(_tankID)) {
-	                return continueTo(addTank);
-	            }
+	      if (dist >= val) {
+	        scale.dist = Math.floor(dist / val) * val;
+	        break;
+	      } else {
+	        scale.dist = +dist.toFixed(2);
+	      }
+	    }
 
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _tankID) {
-	                // keep the user's area selected..
-	                context.enter(modeSelect(context, [_tankID]));
+	    dLon = geoMetersToLon(scale.dist / conversion, lat);
+	    scale.px = Math.round(projection([loc1[0] + dLon, loc1[1]])[0]);
+	    scale.text = displayLength(scale.dist / conversion, isImperial);
+	    return scale;
+	  }
 
-	                // reset pane, in case user somehow happened to change it..
-	                context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
-	                // disallow scrolling
-	                context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	  function update(selection) {
+	    // choose loc1, loc2 along bottom of viewport (near where the scale will be drawn)
+	    var dims = context.map().dimensions(),
+	        loc1 = projection.invert([0, dims[1]]),
+	        loc2 = projection.invert([maxLength, dims[1]]),
+	        scale = scaleDefs(loc1, loc2);
+	    selection.select('.scale-path').attr('d', 'M0.5,0.5v' + tickHeight + 'h' + scale.px + 'v-' + tickHeight);
+	    selection.select('.scale-text').style(_mainLocalizer.textDirection() === 'ltr' ? 'left' : 'right', scale.px + 16 + 'px').text(scale.text);
+	  }
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', null)
-	                    .on('keyup.intro', checkPresetSearch);
+	  return function (selection) {
+	    function switchUnits() {
+	      isImperial = !isImperial;
+	      selection.call(update);
+	    }
 
-	                reveal('.preset-search-input',
-	                    helpString('intro.buildings.search_tank', { preset: tankPreset.name() })
-	                );
+	    var scalegroup = selection.append('svg').attr('class', 'scale').on('click', switchUnits).append('g').attr('transform', 'translate(10,11)');
+	    scalegroup.append('path').attr('class', 'scale-path');
+	    selection.append('div').attr('class', 'scale-text');
+	    selection.call(update);
+	    context.map().on('move.scale', function () {
+	      update(selection);
+	    });
+	  };
+	}
 
-	                context.history().on('change.intro', null);
-	            }
-	        });
+	function uiShortcuts(context) {
+	  var detected = utilDetect();
+	  var _activeTab = 0;
 
-	        function checkPresetSearch() {
-	            var first = context.container().select('.preset-list-item:first-child');
+	  var _modalSelection;
 
-	            if (first.classed('preset-man_made-storage_tank')) {
-	                reveal(first.select('.preset-list-button').node(),
-	                    helpString('intro.buildings.choose_tank', { preset: tankPreset.name() }),
-	                    { duration: 300 }
-	                );
+	  var _selection = select(null);
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', eventCancel, true)
-	                    .on('keyup.intro', null);
+	  var _dataShortcuts;
 
-	                context.history().on('change.intro', function() {
-	                    continueTo(closeEditorTank);
-	                });
-	            }
-	        }
+	  function shortcutsModal(_modalSelection) {
+	    _modalSelection.select('.modal').classed('modal-shortcuts', true);
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	            nextStep();
-	        }
-	    }
+	    var content = _modalSelection.select('.content');
 
+	    content.append('div').attr('class', 'modal-section header').append('h2').call(_t.append('shortcuts.title'));
+	    _mainFileFetcher.get('shortcuts').then(function (data) {
+	      _dataShortcuts = data;
+	      content.call(render);
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  }
 
-	    function closeEditorTank() {
-	        if (!_tankID || !context.hasEntity(_tankID)) {
-	            return addTank();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-	            context.enter(modeSelect(context, [_tankID]));
-	        }
+	  function render(selection) {
+	    if (!_dataShortcuts) return;
+	    var wrapper = selection.selectAll('.wrapper').data([0]);
+	    var wrapperEnter = wrapper.enter().append('div').attr('class', 'wrapper modal-section');
+	    var tabsBar = wrapperEnter.append('div').attr('class', 'tabs-bar');
+	    var shortcutsList = wrapperEnter.append('div').attr('class', 'shortcuts-list');
+	    wrapper = wrapper.merge(wrapperEnter);
+	    var tabs = tabsBar.selectAll('.tab').data(_dataShortcuts);
+	    var tabsEnter = tabs.enter().append('a').attr('class', 'tab').attr('href', '#').on('click', function (d3_event, d) {
+	      d3_event.preventDefault();
 
-	        context.history().checkpoint('hasTank');
+	      var i = _dataShortcuts.indexOf(d);
 
-	        context.on('exit.intro', function() {
-	            continueTo(rightClickTank);
-	        });
+	      _activeTab = i;
+	      render(selection);
+	    });
+	    tabsEnter.append('span').html(function (d) {
+	      return _t.html(d.text);
+	    }); // Update
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane',
-	                helpString('intro.buildings.close', { button: icon('#iD-icon-close', 'pre-text') })
-	            );
-	        }, 500);
+	    wrapper.selectAll('.tab').classed('active', function (d, i) {
+	      return i === _activeTab;
+	    });
+	    var shortcuts = shortcutsList.selectAll('.shortcut-tab').data(_dataShortcuts);
+	    var shortcutsEnter = shortcuts.enter().append('div').attr('class', function (d) {
+	      return 'shortcut-tab shortcut-tab-' + d.tab;
+	    });
+	    var columnsEnter = shortcutsEnter.selectAll('.shortcut-column').data(function (d) {
+	      return d.columns;
+	    }).enter().append('table').attr('class', 'shortcut-column');
+	    var rowsEnter = columnsEnter.selectAll('.shortcut-row').data(function (d) {
+	      return d.rows;
+	    }).enter().append('tr').attr('class', 'shortcut-row');
+	    var sectionRows = rowsEnter.filter(function (d) {
+	      return !d.shortcuts;
+	    });
+	    sectionRows.append('td');
+	    sectionRows.append('td').attr('class', 'shortcut-section').append('h3').html(function (d) {
+	      return _t.html(d.text);
+	    });
+	    var shortcutRows = rowsEnter.filter(function (d) {
+	      return d.shortcuts;
+	    });
+	    var shortcutKeys = shortcutRows.append('td').attr('class', 'shortcut-keys');
+	    var modifierKeys = shortcutKeys.filter(function (d) {
+	      return d.modifiers;
+	    });
+	    modifierKeys.selectAll('kbd.modifier').data(function (d) {
+	      if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
+	        return ['⌘'];
+	      } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
+	        return [];
+	      } else {
+	        return d.modifiers;
+	      }
+	    }).enter().each(function () {
+	      var selection = select(this);
+	      selection.append('kbd').attr('class', 'modifier').text(function (d) {
+	        return uiCmd.display(d);
+	      });
+	      selection.append('span').text('+');
+	    });
+	    shortcutKeys.selectAll('kbd.shortcut').data(function (d) {
+	      var arr = d.shortcuts;
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
-	    }
+	      if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
+	        arr = ['Y'];
+	      } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
+	        arr = ['F11'];
+	      } // replace translations
 
 
-	    function rightClickTank() {
-	        if (!_tankID) { return continueTo(addTank); }
+	      arr = arr.map(function (s) {
+	        return uiCmd.display(s.indexOf('.') !== -1 ? _t(s) : s);
+	      });
+	      return utilArrayUniq(arr).map(function (s) {
+	        return {
+	          shortcut: s,
+	          separator: d.separator,
+	          suffix: d.suffix
+	        };
+	      });
+	    }).enter().each(function (d, i, nodes) {
+	      var selection = select(this);
+	      var click = d.shortcut.toLowerCase().match(/(.*).click/);
+
+	      if (click && click[1]) {
+	        // replace "left_click", "right_click" with mouse icon
+	        selection.call(svgIcon('#iD-walkthrough-mouse-' + click[1], 'operation'));
+	      } else if (d.shortcut.toLowerCase() === 'long-press') {
+	        selection.call(svgIcon('#iD-walkthrough-longpress', 'longpress operation'));
+	      } else if (d.shortcut.toLowerCase() === 'tap') {
+	        selection.call(svgIcon('#iD-walkthrough-tap', 'tap operation'));
+	      } else {
+	        selection.append('kbd').attr('class', 'shortcut').text(function (d) {
+	          return d.shortcut;
+	        });
+	      }
 
-	        context.enter(modeBrowse(context));
-	        context.history().reset('hasTank');
-	        context.map().centerEase(tank, 500);
-
-	        timeout(function() {
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'select') { return; }
-	                var ids = context.selectedIDs();
-	                if (ids.length !== 1 || ids[0] !== _tankID) { return; }
-
-	                timeout(function() {
-	                    var node = selectMenuItem(context, 'circularize').node();
-	                    if (!node) { return; }
-	                    continueTo(clickCircle);
-	                }, 50);  // after menu visible
-	            });
+	      if (i < nodes.length - 1) {
+	        selection.append('span').html(d.separator || "\xA0" + _t.html('shortcuts.or') + "\xA0");
+	      } else if (i === nodes.length - 1 && d.suffix) {
+	        selection.append('span').text(d.suffix);
+	      }
+	    });
+	    shortcutKeys.filter(function (d) {
+	      return d.gesture;
+	    }).each(function () {
+	      var selection = select(this);
+	      selection.append('span').text('+');
+	      selection.append('span').attr('class', 'gesture').html(function (d) {
+	        return _t.html(d.gesture);
+	      });
+	    });
+	    shortcutRows.append('td').attr('class', 'shortcut-desc').html(function (d) {
+	      return d.text ? _t.html(d.text) : "\xA0";
+	    }); // Update
 
-	            var rightclickString = helpString('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_tank' : 'edit_menu_tank_touch'));
+	    wrapper.selectAll('.shortcut-tab').style('display', function (d, i) {
+	      return i === _activeTab ? 'flex' : 'none';
+	    });
+	  }
 
-	            revealTank(tank, rightclickString);
+	  return function (selection, show) {
+	    _selection = selection;
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealTank(tank, rightclickString, { duration: 0 });
-	            });
+	    if (show) {
+	      _modalSelection = uiModal(selection);
 
-	            context.history().on('change.intro', function() {
-	                continueTo(rightClickTank);
-	            });
+	      _modalSelection.call(shortcutsModal);
+	    } else {
+	      context.keybinding().on([_t('shortcuts.toggle.key'), '?'], function () {
+	        if (context.container().selectAll('.modal-shortcuts').size()) {
+	          // already showing
+	          if (_modalSelection) {
+	            _modalSelection.close();
 
-	        }, 600);
+	            _modalSelection = null;
+	          }
+	        } else {
+	          _modalSelection = uiModal(_selection);
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
+	          _modalSelection.call(shortcutsModal);
 	        }
+	      });
 	    }
+	  };
+	}
 
+	function uiDataHeader() {
+	  var _datum;
 
-	    function clickCircle() {
-	        if (!_tankID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_tankID);
-	        if (!entity) { return continueTo(rightClickTank); }
-
-	        var node = selectMenuItem(context, 'circularize').node();
-	        if (!node) { return continueTo(rightClickTank); }
+	  function dataHeader(selection) {
+	    var header = selection.selectAll('.data-header').data(_datum ? [_datum] : [], function (d) {
+	      return d.__featurehash__;
+	    });
+	    header.exit().remove();
+	    var headerEnter = header.enter().append('div').attr('class', 'data-header');
+	    var iconEnter = headerEnter.append('div').attr('class', 'data-header-icon');
+	    iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-data', 'note-fill'));
+	    headerEnter.append('div').attr('class', 'data-header-label').call(_t.append('map_data.layers.custom.title'));
+	  }
 
-	        var wasChanged = false;
+	  dataHeader.datum = function (val) {
+	    if (!arguments.length) return _datum;
+	    _datum = val;
+	    return this;
+	  };
 
-	        reveal('.edit-menu',
-	            helpString('intro.buildings.circle_tank'),
-	            { padding: 50 }
-	        );
+	  return dataHeader;
+	}
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'browse') {
-	                continueTo(rightClickTank);
-	            } else if (mode.id === 'move' || mode.id === 'rotate') {
-	                continueTo(retryClickCircle);
-	            }
-	        });
+	// It is keyed on the `value` of the entry. Data should be an array of objects like:
+	//   [{
+	//       value:   'string value',  // required
+	//       display: 'label html'     // optional
+	//       title:   'hover text'     // optional
+	//       terms:   ['search terms'] // optional
+	//   }, ...]
 
-	        context.map().on('move.intro', function() {
-	            var node = selectMenuItem(context, 'circularize').node();
-	            if (!wasChanged && !node) { return continueTo(rightClickTank); }
+	var _comboHideTimerID;
 
-	            reveal('.edit-menu',
-	                helpString('intro.buildings.circle_tank'),
-	                { duration: 0, padding: 50 }
-	            );
-	        });
+	function uiCombobox(context, klass) {
+	  var dispatch = dispatch$8('accept', 'cancel');
+	  var container = context.container();
+	  var _suggestions = [];
+	  var _data = [];
+	  var _fetched = {};
+	  var _selected = null;
+	  var _canAutocomplete = true;
+	  var _caseSensitive = false;
+	  var _cancelFetch = false;
+	  var _minItems = 2;
+	  var _tDown = 0;
+
+	  var _mouseEnterHandler, _mouseLeaveHandler;
+
+	  var _fetcher = function _fetcher(val, cb) {
+	    cb(_data.filter(function (d) {
+	      var terms = d.terms || [];
+	      terms.push(d.value);
+	      return terms.some(function (term) {
+	        return term.toString().toLowerCase().indexOf(val.toLowerCase()) !== -1;
+	      });
+	    }));
+	  };
 
-	        context.history().on('change.intro', function() {
-	            wasChanged = true;
-	            context.history().on('change.intro', null);
+	  var combobox = function combobox(input, attachTo) {
+	    if (!input || input.empty()) return;
+	    input.classed('combobox-input', true).on('focus.combo-input', focus).on('blur.combo-input', blur).on('keydown.combo-input', keydown).on('keyup.combo-input', keyup).on('input.combo-input', change).on('mousedown.combo-input', mousedown).each(function () {
+	      var parent = this.parentNode;
+	      var sibling = this.nextSibling;
+	      select(parent).selectAll('.combobox-caret').filter(function (d) {
+	        return d === input.node();
+	      }).data([input.node()]).enter().insert('div', function () {
+	        return sibling;
+	      }).attr('class', 'combobox-caret').on('mousedown.combo-caret', function (d3_event) {
+	        d3_event.preventDefault(); // don't steal focus from input
 
-	            // Something changed.  Wait for transition to complete and check undo annotation.
-	            timeout(function() {
-	                if (context.history().undoAnnotation() === _t('operations.circularize.annotation.single')) {
-	                    continueTo(play);
-	                } else {
-	                    continueTo(retryClickCircle);
-	                }
-	            }, 500);  // after transitioned actions
-	        });
+	        input.node().focus(); // focus the input as if it was clicked
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	        mousedown(d3_event);
+	      }).on('mouseup.combo-caret', function (d3_event) {
+	        d3_event.preventDefault(); // don't steal focus from input
 
+	        mouseup(d3_event);
+	      });
+	    });
 
-	    function retryClickCircle() {
-	        context.enter(modeBrowse(context));
+	    function mousedown(d3_event) {
+	      if (d3_event.button !== 0) return; // left click only
 
-	        revealTank(tank, helpString('intro.buildings.retry_circle'), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(rightClickTank); }
-	        });
+	      if (input.classed('disabled')) return;
+	      _tDown = +new Date(); // clear selection
 
-	        function continueTo(nextStep) {
-	            nextStep();
-	        }
-	    }
+	      var start = input.property('selectionStart');
+	      var end = input.property('selectionEnd');
 
+	      if (start !== end) {
+	        var val = utilGetSetValue(input);
+	        input.node().setSelectionRange(val.length, val.length);
+	        return;
+	      }
 
-	    function play() {
-	        dispatch$1.call('done');
-	        reveal('.ideditor',
-	            helpString('intro.buildings.play', { next: _t('intro.startediting.title') }), {
-	                tooltipBox: '.intro-nav-wrap .chapter-startEditing',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { reveal('.ideditor'); }
-	            }
-	        );
+	      input.on('mouseup.combo-input', mouseup);
 	    }
 
+	    function mouseup(d3_event) {
+	      input.on('mouseup.combo-input', null);
+	      if (d3_event.button !== 0) return; // left click only
 
-	    chapter.enter = function() {
-	        addHouse();
-	    };
-
-
-	    chapter.exit = function() {
-	        timeouts.forEach(window.clearTimeout);
-	        context.on('enter.intro exit.intro', null);
-	        context.map().on('move.intro drawn.intro', null);
-	        context.history().on('change.intro', null);
-	        context.container().select('.inspector-wrap').on('wheel.intro', null);
-	        context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	        context.container().select('.more-fields .combobox-input').on('click.intro', null);
-	    };
-
-
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
-
-
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	      if (input.classed('disabled')) return;
+	      if (input.node() !== document.activeElement) return; // exit if this input is not focused
 
-	function uiIntroStartEditing(context, reveal) {
-	    var dispatch$1 = dispatch('done', 'startEditing');
-	    var modalSelection = select(null);
+	      var start = input.property('selectionStart');
+	      var end = input.property('selectionEnd');
+	      if (start !== end) return; // exit if user is selecting
+	      // not showing or showing for a different field - try to show it.
 
+	      var combo = container.selectAll('.combobox');
 
-	    var chapter = {
-	        title: 'intro.startediting.title'
-	    };
+	      if (combo.empty() || combo.datum() !== input.node()) {
+	        var tOrig = _tDown;
+	        window.setTimeout(function () {
+	          if (tOrig !== _tDown) return; // exit if user double clicked
 
-	    function showHelp() {
-	        reveal('.map-control.help-control',
-	            helpString('intro.startediting.help'), {
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { shortcuts(); }
-	            }
-	        );
+	          fetchComboData('', function () {
+	            show();
+	            render();
+	          });
+	        }, 250);
+	      } else {
+	        hide();
+	      }
 	    }
 
-	    function shortcuts() {
-	        reveal('.map-control.help-control',
-	            helpString('intro.startediting.shortcuts'), {
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { showSave(); }
-	            }
-	        );
+	    function focus() {
+	      fetchComboData(''); // prefetch values (may warm taginfo cache)
 	    }
 
-	    function showSave() {
-	        context.container().selectAll('.shaded').remove();  // in case user opened keyboard shortcuts
-	        reveal('.top-toolbar button.save',
-	            helpString('intro.startediting.save'), {
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { showStart(); }
-	            }
-	        );
+	    function blur() {
+	      _comboHideTimerID = window.setTimeout(hide, 75);
 	    }
 
-	    function showStart() {
-	        context.container().selectAll('.shaded').remove();  // in case user opened keyboard shortcuts
+	    function show() {
+	      hide(); // remove any existing
 
-	        modalSelection = uiModal(context.container());
+	      container.insert('div', ':first-child').datum(input.node()).attr('class', 'combobox' + (klass ? ' combobox-' + klass : '')).style('position', 'absolute').style('display', 'block').style('left', '0px').on('mousedown.combo-container', function (d3_event) {
+	        // prevent moving focus out of the input field
+	        d3_event.preventDefault();
+	      });
+	      container.on('scroll.combo-scroll', render, true);
+	    }
 
-	        modalSelection.select('.modal')
-	            .attr('class', 'modal-splash modal');
+	    function hide() {
+	      if (_comboHideTimerID) {
+	        window.clearTimeout(_comboHideTimerID);
+	        _comboHideTimerID = undefined;
+	      }
 
-	        modalSelection.selectAll('.close').remove();
+	      container.selectAll('.combobox').remove();
+	      container.on('scroll.combo-scroll', null);
+	    }
 
-	        var startbutton = modalSelection.select('.content')
-	            .attr('class', 'fillL')
-	            .append('button')
-	                .attr('class', 'modal-section huge-modal-button')
-	                .on('click', function() {
-	                    modalSelection.remove();
-	                });
+	    function keydown(d3_event) {
+	      var shown = !container.selectAll('.combobox').empty();
+	      var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
 
-	            startbutton
-	                .append('svg')
-	                .attr('class', 'illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-logo-walkthrough');
+	      switch (d3_event.keyCode) {
+	        case 8: // ⌫ Backspace
 
-	            startbutton
-	                .append('h2')
-	                .text(_t('intro.startediting.start'));
+	        case 46:
+	          // ⌦ Delete
+	          d3_event.stopPropagation();
+	          _selected = null;
+	          render();
+	          input.on('input.combo-input', function () {
+	            var start = input.property('selectionStart');
+	            input.node().setSelectionRange(start, start);
+	            input.on('input.combo-input', change);
+	          });
+	          break;
 
-	        dispatch$1.call('startEditing');
-	    }
+	        case 9:
+	          // ⇥ Tab
+	          accept();
+	          break;
 
+	        case 13:
+	          // ↩ Return
+	          d3_event.preventDefault();
+	          d3_event.stopPropagation();
+	          break;
 
-	    chapter.enter = function() {
-	        showHelp();
-	    };
+	        case 38:
+	          // ↑ Up arrow
+	          if (tagName === 'textarea' && !shown) return;
+	          d3_event.preventDefault();
 
+	          if (tagName === 'input' && !shown) {
+	            show();
+	          }
 
-	    chapter.exit = function() {
-	        modalSelection.remove();
-	        context.container().selectAll('.shaded').remove();  // in case user opened keyboard shortcuts
-	    };
+	          nav(-1);
+	          break;
 
+	        case 40:
+	          // ↓ Down arrow
+	          if (tagName === 'textarea' && !shown) return;
+	          d3_event.preventDefault();
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	          if (tagName === 'input' && !shown) {
+	            show();
+	          }
 
-	var chapterUi = {
-	  welcome: uiIntroWelcome,
-	  navigation: uiIntroNavigation,
-	  point: uiIntroPoint,
-	  area: uiIntroArea,
-	  line: uiIntroLine,
-	  building: uiIntroBuilding,
-	  startEditing: uiIntroStartEditing
-	};
+	          nav(+1);
+	          break;
+	      }
+	    }
 
-	var chapterFlow = [
-	  'welcome',
-	  'navigation',
-	  'point',
-	  'area',
-	  'line',
-	  'building',
-	  'startEditing'
-	];
+	    function keyup(d3_event) {
+	      switch (d3_event.keyCode) {
+	        case 27:
+	          // ⎋ Escape
+	          cancel();
+	          break;
 
+	        case 13:
+	          // ↩ Return
+	          accept();
+	          break;
+	      }
+	    } // Called whenever the input value is changed (e.g. on typing)
 
-	function uiIntro(context) {
-	  var INTRO_IMAGERY = 'EsriWorldImageryClarity';
-	  var _introGraph = {};
-	  var _currChapter;
 
+	    function change() {
+	      fetchComboData(value(), function () {
+	        _selected = null;
+	        var val = input.property('value');
 
-	  function intro(selection) {
-	    _mainFileFetcher.get('intro_graph')
-	      .then(function (dataIntroGraph) {
-	        // create entities for intro graph and localize names
-	        for (var id in dataIntroGraph) {
-	          if (!_introGraph[id]) {
-	            _introGraph[id] = osmEntity(localize(dataIntroGraph[id]));
+	        if (_suggestions.length) {
+	          if (input.property('selectionEnd') === val.length) {
+	            _selected = tryAutocomplete();
+	          }
+
+	          if (!_selected) {
+	            _selected = val;
 	          }
 	        }
-	        selection.call(startIntro);
-	      })
-	      .catch(function() { /* ignore */ });
-	  }
 
+	        if (val.length) {
+	          var combo = container.selectAll('.combobox');
 
-	  function startIntro(selection) {
-	    context.enter(modeBrowse(context));
+	          if (combo.empty()) {
+	            show();
+	          }
+	        } else {
+	          hide();
+	        }
 
-	    // Save current map state
-	    var osm = context.connection();
-	    var history = context.history().toJSON();
-	    var hash = window.location.hash;
-	    var center = context.map().center();
-	    var zoom = context.map().zoom();
-	    var background = context.background().baseLayerSource();
-	    var overlays = context.background().overlayLayerSources();
-	    var opacity = context.container().selectAll('.main-map .layer-background').style('opacity');
-	    var caches = osm && osm.caches();
-	    var baseEntities = context.history().graph().base().entities;
+	        render();
+	      });
+	    } // Called when the user presses up/down arrows to navigate the list
 
-	    // Show sidebar and disable the sidebar resizing button
-	    // (this needs to be before `context.inIntro(true)`)
-	    context.ui().sidebar.expand();
-	    context.container().selectAll('button.sidebar-toggle').classed('disabled', true);
 
-	    // Block saving
-	    context.inIntro(true);
+	    function nav(dir) {
+	      if (_suggestions.length) {
+	        // try to determine previously selected index..
+	        var index = -1;
 
-	    // Load semi-real data used in intro
-	    if (osm) { osm.toggle(false).reset(); }
-	    context.history().reset();
-	    context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
-	    context.history().checkpoint('initial');
+	        for (var i = 0; i < _suggestions.length; i++) {
+	          if (_selected && _suggestions[i].value === _selected) {
+	            index = i;
+	            break;
+	          }
+	        } // pick new _selected
 
-	    // Setup imagery
-	    var imagery = context.background().findSource(INTRO_IMAGERY);
-	    if (imagery) {
-	      context.background().baseLayerSource(imagery);
-	    } else {
-	      context.background().bing();
-	    }
-	    overlays.forEach(function (d) { return context.background().toggleOverlayLayer(d); });
 
-	    // Setup data layers (only OSM)
-	    var layers = context.layers();
-	    layers.all().forEach(function (item) {
-	      // if the layer has the function `enabled`
-	      if (typeof item.layer.enabled === 'function') {
-	        item.layer.enabled(item.id === 'osm');
+	        index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
+	        _selected = _suggestions[index].value;
+	        input.property('value', _selected);
 	      }
-	    });
-
-
-	    context.container().selectAll('.main-map .layer-background').style('opacity', 1);
-
-	    var curtain = uiCurtain(context.container().node());
-	    selection.call(curtain);
 
-	    // Store that the user started the walkthrough..
-	    corePreferences('walkthrough_started', 'yes');
+	      render();
+	      ensureVisible();
+	    }
 
-	    // Restore previous walkthrough progress..
-	    var storedProgress = corePreferences('walkthrough_progress') || '';
-	    var progress = storedProgress.split(';').filter(Boolean);
+	    function ensureVisible() {
+	      var combo = container.selectAll('.combobox');
+	      if (combo.empty()) return;
+	      var containerRect = container.node().getBoundingClientRect();
+	      var comboRect = combo.node().getBoundingClientRect();
 
-	    var chapters = chapterFlow.map(function (chapter, i) {
-	      var s = chapterUi[chapter](context, curtain.reveal)
-	        .on('done', function () {
+	      if (comboRect.bottom > containerRect.bottom) {
+	        var node = attachTo ? attachTo.node() : input.node();
+	        node.scrollIntoView({
+	          behavior: 'instant',
+	          block: 'center'
+	        });
+	        render();
+	      } // https://stackoverflow.com/questions/11039885/scrollintoview-causing-the-whole-page-to-move
 
-	          buttons
-	            .filter(function (d) { return d.title === s.title; })
-	            .classed('finished', true);
 
-	          if (i < chapterFlow.length - 1) {
-	            var next = chapterFlow[i + 1];
-	            context.container().select(("button.chapter-" + next))
-	              .classed('next', true);
-	          }
+	      var selected = combo.selectAll('.combobox-option.selected').node();
 
-	          // Store walkthrough progress..
-	          progress.push(chapter);
-	          corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
+	      if (selected) {
+	        selected.scrollIntoView({
+	          behavior: 'smooth',
+	          block: 'nearest'
 	        });
-	      return s;
-	    });
-
-	    chapters[chapters.length - 1].on('startEditing', function () {
-	      // Store walkthrough progress..
-	      progress.push('startEditing');
-	      corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
-
-	      // Store if walkthrough is completed..
-	      var incomplete = utilArrayDifference(chapterFlow, progress);
-	      if (!incomplete.length) {
-	        corePreferences('walkthrough_completed', 'yes');
 	      }
+	    }
 
-	      curtain.remove();
-	      navwrap.remove();
-	      context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
-	      context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
-	      if (osm) { osm.toggle(true).reset().caches(caches); }
-	      context.history().reset().merge(Object.values(baseEntities));
-	      context.background().baseLayerSource(background);
-	      overlays.forEach(function (d) { return context.background().toggleOverlayLayer(d); });
-	      if (history) { context.history().fromJSON(history, false); }
-	      context.map().centerZoom(center, zoom);
-	      window.location.replace(hash);
-	      context.inIntro(false);
-	    });
-
-	    var navwrap = selection
-	      .append('div')
-	      .attr('class', 'intro-nav-wrap fillD');
+	    function value() {
+	      var value = input.property('value');
+	      var start = input.property('selectionStart');
+	      var end = input.property('selectionEnd');
 
-	    navwrap
-	      .append('svg')
-	      .attr('class', 'intro-nav-wrap-logo')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-walkthrough');
+	      if (start && end) {
+	        value = value.substring(0, start);
+	      }
 
-	    var buttonwrap = navwrap
-	      .append('div')
-	      .attr('class', 'joined')
-	      .selectAll('button.chapter');
+	      return value;
+	    }
 
-	    var buttons = buttonwrap
-	      .data(chapters)
-	      .enter()
-	      .append('button')
-	      .attr('class', function (d, i) { return ("chapter chapter-" + (chapterFlow[i])); })
-	      .on('click', enterChapter);
+	    function fetchComboData(v, cb) {
+	      _cancelFetch = false;
 
-	    buttons
-	      .append('span')
-	      .text(function (d) { return _t(d.title); });
+	      _fetcher.call(input, v, function (results) {
+	        // already chose a value, don't overwrite or autocomplete it
+	        if (_cancelFetch) return;
+	        _suggestions = results;
+	        results.forEach(function (d) {
+	          _fetched[d.value] = d;
+	        });
 
-	    buttons
-	      .append('span')
-	      .attr('class', 'status')
-	      .call(svgIcon((_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'), 'inline'));
+	        if (cb) {
+	          cb();
+	        }
+	      });
+	    }
 
-	    enterChapter(chapters[0]);
+	    function tryAutocomplete() {
+	      if (!_canAutocomplete) return;
+	      var val = _caseSensitive ? value() : value().toLowerCase();
+	      if (!val) return; // Don't autocomplete if user is typing a number - #4935
 
+	      if (!isNaN(parseFloat(val)) && isFinite(val)) return;
+	      var bestIndex = -1;
 
-	    function enterChapter(newChapter) {
-	      if (_currChapter) { _currChapter.exit(); }
-	      context.enter(modeBrowse(context));
+	      for (var i = 0; i < _suggestions.length; i++) {
+	        var suggestion = _suggestions[i].value;
+	        var compare = _caseSensitive ? suggestion : suggestion.toLowerCase(); // if search string matches suggestion exactly, pick it..
 
-	      _currChapter = newChapter;
-	      _currChapter.enter();
+	        if (compare === val) {
+	          bestIndex = i;
+	          break; // otherwise lock in the first result that starts with the search string..
+	        } else if (bestIndex === -1 && compare.indexOf(val) === 0) {
+	          bestIndex = i;
+	        }
+	      }
 
-	      buttons
-	        .classed('next', false)
-	        .classed('active', function (d) { return d.title === _currChapter.title; });
+	      if (bestIndex !== -1) {
+	        var bestVal = _suggestions[bestIndex].value;
+	        input.property('value', bestVal);
+	        input.node().setSelectionRange(val.length, bestVal.length);
+	        return bestVal;
+	      }
 	    }
-	  }
 
+	    function render() {
+	      if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
+	        hide();
+	        return;
+	      }
 
-	  return intro;
-	}
+	      var shown = !container.selectAll('.combobox').empty();
+	      if (!shown) return;
+	      var combo = container.selectAll('.combobox');
+	      var options = combo.selectAll('.combobox-option').data(_suggestions, function (d) {
+	        return d.value;
+	      });
+	      options.exit().remove(); // enter/update
+
+	      options.enter().append('a').attr('class', function (d) {
+	        return 'combobox-option ' + (d.klass || '');
+	      }).attr('title', function (d) {
+	        return d.title;
+	      }).html(function (d) {
+	        return d.display || d.value;
+	      }).on('mouseenter', _mouseEnterHandler).on('mouseleave', _mouseLeaveHandler).merge(options).classed('selected', function (d) {
+	        return d.value === _selected;
+	      }).on('click.combo-option', accept).order();
+	      var node = attachTo ? attachTo.node() : input.node();
+	      var containerRect = container.node().getBoundingClientRect();
+	      var rect = node.getBoundingClientRect();
+	      combo.style('left', rect.left + 5 - containerRect.left + 'px').style('width', rect.width - 10 + 'px').style('top', rect.height + rect.top - containerRect.top + 'px');
+	    } // Dispatches an 'accept' event
+	    // Then hides the combobox.
+
+
+	    function accept(d3_event, d) {
+	      _cancelFetch = true;
+	      var thiz = input.node();
+
+	      if (d) {
+	        // user clicked on a suggestion
+	        utilGetSetValue(input, d.value); // replace field contents
+
+	        utilTriggerEvent(input, 'change');
+	      } // clear (and keep) selection
+
+
+	      var val = utilGetSetValue(input);
+	      thiz.setSelectionRange(val.length, val.length);
+	      d = _fetched[val];
+	      dispatch.call('accept', thiz, d, val);
+	      hide();
+	    } // Dispatches an 'cancel' event
+	    // Then hides the combobox.
 
-	function uiIssuesInfo(context) {
 
-	    var warningsItem = {
-	        id: 'warnings',
-	        count: 0,
-	        iconID: 'iD-icon-alert',
-	        descriptionID: 'issues.warnings_and_errors'
-	    };
+	    function cancel() {
+	      _cancelFetch = true;
+	      var thiz = input.node(); // clear (and remove) selection, and replace field contents
 
-	    var resolvedItem = {
-	        id: 'resolved',
-	        count: 0,
-	        iconID: 'iD-icon-apply',
-	        descriptionID: 'issues.user_resolved_issues'
-	    };
+	      var val = utilGetSetValue(input);
+	      var start = input.property('selectionStart');
+	      var end = input.property('selectionEnd');
+	      val = val.slice(0, start) + val.slice(end);
+	      utilGetSetValue(input, val);
+	      thiz.setSelectionRange(val.length, val.length);
+	      dispatch.call('cancel', thiz);
+	      hide();
+	    }
+	  };
 
-	    function update(selection) {
+	  combobox.canAutocomplete = function (val) {
+	    if (!arguments.length) return _canAutocomplete;
+	    _canAutocomplete = val;
+	    return combobox;
+	  };
 
-	        var shownItems = [];
+	  combobox.caseSensitive = function (val) {
+	    if (!arguments.length) return _caseSensitive;
+	    _caseSensitive = val;
+	    return combobox;
+	  };
 
-	        var liveIssues = context.validator().getIssues({
-	            what: corePreferences('validate-what') || 'edited',
-	            where: corePreferences('validate-where') || 'all'
-	        });
-	        if (liveIssues.length) {
-	            warningsItem.count = liveIssues.length;
-	            shownItems.push(warningsItem);
-	        }
+	  combobox.data = function (val) {
+	    if (!arguments.length) return _data;
+	    _data = val;
+	    return combobox;
+	  };
 
-	        if (corePreferences('validate-what') === 'all') {
-	            var resolvedIssues = context.validator().getResolvedIssues();
-	            if (resolvedIssues.length) {
-	                resolvedItem.count = resolvedIssues.length;
-	                shownItems.push(resolvedItem);
-	            }
-	        }
+	  combobox.fetcher = function (val) {
+	    if (!arguments.length) return _fetcher;
+	    _fetcher = val;
+	    return combobox;
+	  };
 
-	        var chips = selection.selectAll('.chip')
-	            .data(shownItems, function(d) {
-	                return d.id;
-	            });
+	  combobox.minItems = function (val) {
+	    if (!arguments.length) return _minItems;
+	    _minItems = val;
+	    return combobox;
+	  };
 
-	        chips.exit().remove();
+	  combobox.itemsMouseEnter = function (val) {
+	    if (!arguments.length) return _mouseEnterHandler;
+	    _mouseEnterHandler = val;
+	    return combobox;
+	  };
 
-	        var enter = chips.enter()
-	            .append('a')
-	            .attr('class', function(d) {
-	                return 'chip ' + d.id + '-count';
-	            })
-	            .attr('href', '#')
-	            .attr('tabindex', -1)
-	            .each(function(d) {
+	  combobox.itemsMouseLeave = function (val) {
+	    if (!arguments.length) return _mouseLeaveHandler;
+	    _mouseLeaveHandler = val;
+	    return combobox;
+	  };
 
-	                var chipSelection = select(this);
+	  return utilRebind(combobox, dispatch, 'on');
+	}
 
-	                var tooltipBehavior = uiTooltip()
-	                    .placement('top')
-	                    .title(_t(d.descriptionID));
+	uiCombobox.off = function (input, context) {
+	  input.on('focus.combo-input', null).on('blur.combo-input', null).on('keydown.combo-input', null).on('keyup.combo-input', null).on('input.combo-input', null).on('mousedown.combo-input', null).on('mouseup.combo-input', null);
+	  context.container().on('scroll.combo-scroll', null);
+	};
 
-	                chipSelection
-	                    .call(tooltipBehavior)
-	                    .on('click', function() {
-	                        event.preventDefault();
+	function uiDisclosure(context, key, expandedDefault) {
+	  var dispatch = dispatch$8('toggled');
 
-	                        tooltipBehavior.hide(select(this));
-	                        // open the Issues pane
-	                        context.ui().togglePanes(context.container().select('.map-panes .issues-pane'));
-	                    });
+	  var _expanded;
 
-	                chipSelection.call(svgIcon('#' + d.iconID));
+	  var _label = utilFunctor('');
 
-	            });
+	  var _updatePreference = true;
 
-	        enter.append('span')
-	            .attr('class', 'count');
+	  var _content = function _content() {};
 
-	        enter.merge(chips)
-	            .selectAll('span.count')
-	            .text(function(d) {
-	                return d.count.toString();
-	            });
+	  var disclosure = function disclosure(selection) {
+	    if (_expanded === undefined || _expanded === null) {
+	      // loading _expanded here allows it to be reset by calling `disclosure.expanded(null)`
+	      var preference = corePreferences('disclosure.' + key + '.expanded');
+	      _expanded = preference === null ? !!expandedDefault : preference === 'true';
 	    }
 
+	    var hideToggle = selection.selectAll('.hide-toggle-' + key).data([0]); // enter
 
-	    return function(selection) {
-	        update(selection);
-
-	        context.validator().on('validated.infobox', function() {
-	            update(selection);
-	        });
-	    };
-	}
-
-	// import { utilGetDimensions } from '../util/dimensions';
+	    var hideToggleEnter = hideToggle.enter().append('h3').append('a').attr('role', 'button').attr('href', '#').attr('class', 'hide-toggle hide-toggle-' + key).call(svgIcon('', 'pre-text', 'hide-toggle-icon'));
+	    hideToggleEnter.append('span').attr('class', 'hide-toggle-text'); // update
 
+	    hideToggle = hideToggleEnter.merge(hideToggle);
+	    hideToggle.on('click', toggle).attr('title', _t("icons.".concat(_expanded ? 'collapse' : 'expand'))).attr('aria-expanded', _expanded).classed('expanded', _expanded);
+	    hideToggle.selectAll('.hide-toggle-text').html(_label());
+	    hideToggle.selectAll('.hide-toggle-icon').attr('xlink:href', _expanded ? '#iD-icon-down' : _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward');
+	    var wrap = selection.selectAll('.disclosure-wrap').data([0]); // enter/update
 
-	function uiMapInMap(context) {
+	    wrap = wrap.enter().append('div').attr('class', 'disclosure-wrap disclosure-wrap-' + key).merge(wrap).classed('hide', !_expanded);
 
-	    function mapInMap(selection) {
-	        var backgroundLayer = rendererTileLayer(context);
-	        var overlayLayers = {};
-	        var projection = geoRawMercator();
-	        var dataLayer = svgData(projection, context).showLabels(false);
-	        var debugLayer = svgDebug(projection, context);
-	        var zoom = d3_zoom()
-	            .scaleExtent([geoZoomToScale(0.5), geoZoomToScale(24)])
-	            .on('start', zoomStarted)
-	            .on('zoom', zoomed)
-	            .on('end', zoomEnded);
-
-	        var wrap = select(null);
-	        var tiles = select(null);
-	        var viewport = select(null);
-
-	        var _isTransformed = false;
-	        var _isHidden = true;
-	        var _skipEvents = false;
-	        var _gesture = null;
-	        var _zDiff = 6;    // by default, minimap renders at (main zoom - 6)
-	        var _dMini;        // dimensions of minimap
-	        var _cMini;        // center pixel of minimap
-	        var _tStart;       // transform at start of gesture
-	        var _tCurr;        // transform at most recent event
-	        var _timeoutID;
-
-
-	        function zoomStarted() {
-	            if (_skipEvents) { return; }
-	            _tStart = _tCurr = projection.transform();
-	            _gesture = null;
-	        }
-
-
-	        function zoomed() {
-	            if (_skipEvents) { return; }
-
-	            var x = event.transform.x;
-	            var y = event.transform.y;
-	            var k = event.transform.k;
-	            var isZooming = (k !== _tStart.k);
-	            var isPanning = (x !== _tStart.x || y !== _tStart.y);
-
-	            if (!isZooming && !isPanning) {
-	                return;  // no change
-	            }
+	    if (_expanded) {
+	      wrap.call(_content);
+	    }
 
-	            // lock in either zooming or panning, don't allow both in minimap.
-	            if (!_gesture) {
-	                _gesture = isZooming ? 'zoom' : 'pan';
-	            }
+	    function toggle(d3_event) {
+	      d3_event.preventDefault();
+	      _expanded = !_expanded;
 
-	            var tMini = projection.transform();
-	            var tX, tY, scale;
+	      if (_updatePreference) {
+	        corePreferences('disclosure.' + key + '.expanded', _expanded);
+	      }
 
-	            if (_gesture === 'zoom') {
-	                scale = k / tMini.k;
-	                tX = (_cMini[0] / scale - _cMini[0]) * scale;
-	                tY = (_cMini[1] / scale - _cMini[1]) * scale;
-	            } else {
-	                k = tMini.k;
-	                scale = 1;
-	                tX = x - tMini.x;
-	                tY = y - tMini.y;
-	            }
+	      hideToggle.classed('expanded', _expanded).attr('aria-expanded', _expanded).attr('title', _t("icons.".concat(_expanded ? 'collapse' : 'expand')));
+	      hideToggle.selectAll('.hide-toggle-icon').attr('xlink:href', _expanded ? '#iD-icon-down' : _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward');
+	      wrap.call(uiToggle(_expanded));
 
-	            utilSetTransform(tiles, tX, tY, scale);
-	            utilSetTransform(viewport, 0, 0, scale);
-	            _isTransformed = true;
-	            _tCurr = identity$2.translate(x, y).scale(k);
+	      if (_expanded) {
+	        wrap.call(_content);
+	      }
 
-	            var zMain = geoScaleToZoom(context.projection.scale());
-	            var zMini = geoScaleToZoom(k);
+	      dispatch.call('toggled', this, _expanded);
+	    }
+	  };
 
-	            _zDiff = zMain - zMini;
+	  disclosure.label = function (val) {
+	    if (!arguments.length) return _label;
+	    _label = utilFunctor(val);
+	    return disclosure;
+	  };
 
-	            queueRedraw();
-	        }
+	  disclosure.expanded = function (val) {
+	    if (!arguments.length) return _expanded;
+	    _expanded = val;
+	    return disclosure;
+	  };
 
+	  disclosure.updatePreference = function (val) {
+	    if (!arguments.length) return _updatePreference;
+	    _updatePreference = val;
+	    return disclosure;
+	  };
 
-	        function zoomEnded() {
-	            if (_skipEvents) { return; }
-	            if (_gesture !== 'pan') { return; }
+	  disclosure.content = function (val) {
+	    if (!arguments.length) return _content;
+	    _content = val;
+	    return disclosure;
+	  };
 
-	            updateProjection();
-	            _gesture = null;
-	            context.map().center(projection.invert(_cMini));   // recenter main map..
-	        }
+	  return utilRebind(disclosure, dispatch, 'on');
+	}
 
+	// Can be labeled and collapsible.
 
-	        function updateProjection() {
-	            var loc = context.map().center();
-	            var tMain = context.projection.transform();
-	            var zMain = geoScaleToZoom(tMain.k);
-	            var zMini = Math.max(zMain - _zDiff, 0.5);
-	            var kMini = geoZoomToScale(zMini);
+	function uiSection(id, context) {
+	  var _classes = utilFunctor('');
 
-	            projection
-	                .translate([tMain.x, tMain.y])
-	                .scale(kMini);
+	  var _shouldDisplay;
 
-	            var point = projection(loc);
-	            var mouse = (_gesture === 'pan') ? geoVecSubtract([_tCurr.x, _tCurr.y], [_tStart.x, _tStart.y]) : [0, 0];
-	            var xMini = _cMini[0] - point[0] + tMain.x + mouse[0];
-	            var yMini = _cMini[1] - point[1] + tMain.y + mouse[1];
+	  var _content;
 
-	            projection
-	                .translate([xMini, yMini])
-	                .clipExtent([[0, 0], _dMini]);
+	  var _disclosure;
 
-	            _tCurr = projection.transform();
+	  var _label;
 
-	            if (_isTransformed) {
-	                utilSetTransform(tiles, 0, 0);
-	                utilSetTransform(viewport, 0, 0);
-	                _isTransformed = false;
-	            }
+	  var _expandedByDefault = utilFunctor(true);
 
-	            zoom
-	                .scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
+	  var _disclosureContent;
 
-	            _skipEvents = true;
-	            wrap.call(zoom.transform, _tCurr);
-	            _skipEvents = false;
-	        }
+	  var _disclosureExpanded;
 
+	  var _containerSelection = select(null);
 
-	        function redraw() {
-	            clearTimeout(_timeoutID);
-	            if (_isHidden) { return; }
+	  var section = {
+	    id: id
+	  };
 
-	            updateProjection();
-	            var zMini = geoScaleToZoom(projection.scale());
+	  section.classes = function (val) {
+	    if (!arguments.length) return _classes;
+	    _classes = utilFunctor(val);
+	    return section;
+	  };
 
-	            // setup tile container
-	            tiles = wrap
-	                .selectAll('.map-in-map-tiles')
-	                .data([0]);
+	  section.label = function (val) {
+	    if (!arguments.length) return _label;
+	    _label = utilFunctor(val);
+	    return section;
+	  };
 
-	            tiles = tiles.enter()
-	                .append('div')
-	                .attr('class', 'map-in-map-tiles')
-	                .merge(tiles);
+	  section.expandedByDefault = function (val) {
+	    if (!arguments.length) return _expandedByDefault;
+	    _expandedByDefault = utilFunctor(val);
+	    return section;
+	  };
 
-	            // redraw background
-	            backgroundLayer
-	                .source(context.background().baseLayerSource())
-	                .projection(projection)
-	                .dimensions(_dMini);
+	  section.shouldDisplay = function (val) {
+	    if (!arguments.length) return _shouldDisplay;
+	    _shouldDisplay = utilFunctor(val);
+	    return section;
+	  };
 
-	            var background = tiles
-	                .selectAll('.map-in-map-background')
-	                .data([0]);
+	  section.content = function (val) {
+	    if (!arguments.length) return _content;
+	    _content = val;
+	    return section;
+	  };
 
-	            background.enter()
-	                .append('div')
-	                .attr('class', 'map-in-map-background')
-	                .merge(background)
-	                .call(backgroundLayer);
+	  section.disclosureContent = function (val) {
+	    if (!arguments.length) return _disclosureContent;
+	    _disclosureContent = val;
+	    return section;
+	  };
 
+	  section.disclosureExpanded = function (val) {
+	    if (!arguments.length) return _disclosureExpanded;
+	    _disclosureExpanded = val;
+	    return section;
+	  }; // may be called multiple times
 
-	            // redraw overlay
-	            var overlaySources = context.background().overlayLayerSources();
-	            var activeOverlayLayers = [];
-	            for (var i = 0; i < overlaySources.length; i++) {
-	                if (overlaySources[i].validZoom(zMini)) {
-	                    if (!overlayLayers[i]) { overlayLayers[i] = rendererTileLayer(context); }
-	                    activeOverlayLayers.push(overlayLayers[i]
-	                        .source(overlaySources[i])
-	                        .projection(projection)
-	                        .dimensions(_dMini));
-	                }
-	            }
 
-	            var overlay = tiles
-	                .selectAll('.map-in-map-overlay')
-	                .data([0]);
+	  section.render = function (selection) {
+	    _containerSelection = selection.selectAll('.section-' + id).data([0]);
 
-	            overlay = overlay.enter()
-	                .append('div')
-	                .attr('class', 'map-in-map-overlay')
-	                .merge(overlay);
+	    var sectionEnter = _containerSelection.enter().append('div').attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
 
+	    _containerSelection = sectionEnter.merge(_containerSelection);
 
-	            var overlays = overlay
-	                .selectAll('div')
-	                .data(activeOverlayLayers, function(d) { return d.source().name(); });
+	    _containerSelection.call(renderContent);
+	  };
 
-	            overlays.exit()
-	                .remove();
+	  section.reRender = function () {
+	    _containerSelection.call(renderContent);
+	  };
 
-	            overlays = overlays.enter()
-	                .append('div')
-	                .merge(overlays)
-	                .each(function(layer) { select(this).call(layer); });
+	  section.selection = function () {
+	    return _containerSelection;
+	  };
 
+	  section.disclosure = function () {
+	    return _disclosure;
+	  }; // may be called multiple times
 
-	            var dataLayers = tiles
-	                .selectAll('.map-in-map-data')
-	                .data([0]);
 
-	            dataLayers.exit()
-	                .remove();
+	  function renderContent(selection) {
+	    if (_shouldDisplay) {
+	      var shouldDisplay = _shouldDisplay();
 
-	            dataLayers = dataLayers.enter()
-	                .append('svg')
-	                .attr('class', 'map-in-map-data')
-	                .merge(dataLayers)
-	                .call(dataLayer)
-	                .call(debugLayer);
+	      selection.classed('hide', !shouldDisplay);
 
+	      if (!shouldDisplay) {
+	        selection.html('');
+	        return;
+	      }
+	    }
 
-	            // redraw viewport bounding box
-	            if (_gesture !== 'pan') {
-	                var getPath = d3_geoPath(projection);
-	                var bbox = { type: 'Polygon', coordinates: [context.map().extent().polygon()] };
+	    if (_disclosureContent) {
+	      if (!_disclosure) {
+	        _disclosure = uiDisclosure(context, id.replace(/-/g, '_'), _expandedByDefault()).label(_label || '')
+	        /*.on('toggled', function(expanded) {
+	            if (expanded) { selection.node().parentNode.scrollTop += 200; }
+	        })*/
+	        .content(_disclosureContent);
+	      }
 
-	                viewport = wrap.selectAll('.map-in-map-viewport')
-	                    .data([0]);
+	      if (_disclosureExpanded !== undefined) {
+	        _disclosure.expanded(_disclosureExpanded);
 
-	                viewport = viewport.enter()
-	                    .append('svg')
-	                    .attr('class', 'map-in-map-viewport')
-	                    .merge(viewport);
+	        _disclosureExpanded = undefined;
+	      }
 
+	      selection.call(_disclosure);
+	      return;
+	    }
 
-	                var path = viewport.selectAll('.map-in-map-bbox')
-	                    .data([bbox]);
+	    if (_content) {
+	      selection.call(_content);
+	    }
+	  }
 
-	                path.enter()
-	                    .append('path')
-	                    .attr('class', 'map-in-map-bbox')
-	                    .merge(path)
-	                    .attr('d', getPath)
-	                    .classed('thick', function(d) { return getPath.area(d) < 30; });
-	            }
-	        }
+	  return section;
+	}
 
+	// {
+	//   key: 'string',     // required
+	//   value: 'string'    // optional
+	// }
+	//   -or-
+	// {
+	//   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
+	// }
+	//
 
-	        function queueRedraw() {
-	            clearTimeout(_timeoutID);
-	            _timeoutID = setTimeout(function() { redraw(); }, 750);
-	        }
+	function uiTagReference(what) {
+	  var wikibase = what.qid ? services.wikidata : services.osmWikibase;
+	  var tagReference = {};
 
+	  var _button = select(null);
 
-	        function toggle() {
-	            if (event) { event.preventDefault(); }
+	  var _body = select(null);
 
-	            _isHidden = !_isHidden;
+	  var _loaded;
 
-	            context.container().select('.minimap-toggle-item')
-	                .classed('active', !_isHidden)
-	                .select('input')
-	                .property('checked', !_isHidden);
+	  var _showing;
 
-	            if (_isHidden) {
-	                wrap
-	                    .style('display', 'block')
-	                    .style('opacity', '1')
-	                    .transition()
-	                    .duration(200)
-	                    .style('opacity', '0')
-	                    .on('end', function() {
-	                        selection.selectAll('.map-in-map')
-	                            .style('display', 'none');
-	                    });
-	            } else {
-	                wrap
-	                    .style('display', 'block')
-	                    .style('opacity', '0')
-	                    .transition()
-	                    .duration(200)
-	                    .style('opacity', '1')
-	                    .on('end', function() {
-	                        redraw();
-	                    });
-	            }
-	        }
+	  function load() {
+	    if (!wikibase) return;
 
+	    _button.classed('tag-reference-loading', true);
 
-	        uiMapInMap.toggle = toggle;
+	    wikibase.getDocs(what, gotDocs);
+	  }
 
-	        wrap = selection.selectAll('.map-in-map')
-	            .data([0]);
+	  function gotDocs(err, docs) {
+	    _body.html('');
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'map-in-map')
-	            .style('display', (_isHidden ? 'none' : 'block'))
-	            .call(zoom)
-	            .on('dblclick.zoom', null)
-	            .merge(wrap);
-
-	        // reflow warning: Hardcode dimensions - currently can't resize it anyway..
-	        _dMini = [200,150]; //utilGetDimensions(wrap);
-	        _cMini = geoVecScale(_dMini, 0.5);
-
-	        context.map()
-	            .on('drawn.map-in-map', function(drawn) {
-	                if (drawn.full === true) {
-	                    redraw();
-	                }
-	            });
+	    if (!docs || !docs.title) {
+	      _body.append('p').attr('class', 'tag-reference-description').call(_t.append('inspector.no_documentation_key'));
 
-	        redraw();
+	      done();
+	      return;
+	    }
 
-	        context.keybinding()
-	            .on(_t('background.minimap.key'), toggle);
+	    if (docs.imageURL) {
+	      _body.append('img').attr('class', 'tag-reference-wiki-image').attr('alt', docs.description).attr('src', docs.imageURL).on('load', function () {
+	        done();
+	      }).on('error', function () {
+	        select(this).remove();
+	        done();
+	      });
+	    } else {
+	      done();
 	    }
 
-	    return mapInMap;
-	}
+	    var tagReferenceDescription = _body.append('p').attr('class', 'tag-reference-description').append('span');
 
-	function uiNotice(context) {
+	    if (docs.description) {
+	      tagReferenceDescription = tagReferenceDescription.attr('class', 'localized-text').attr('lang', docs.descriptionLocaleCode || 'und').text(docs.description);
+	    } else {
+	      tagReferenceDescription = tagReferenceDescription.call(_t.append('inspector.no_documentation_key'));
+	    }
 
-	    return function(selection) {
-	        var div = selection
-	            .append('div')
-	            .attr('class', 'notice');
-
-	        var button = div
-	            .append('button')
-	            .attr('class', 'zoom-to notice fillD')
-	            .on('click', function() {
-	                context.map().zoomEase(context.minEditableZoom());
-	            })
-	            .on('wheel', function() {   // let wheel events pass through #4482
-	                var e2 = new WheelEvent(event.type, event);
-	                context.surface().node().dispatchEvent(e2);
-	            });
+	    tagReferenceDescription.append('a').attr('class', 'tag-reference-edit').attr('target', '_blank').attr('title', _t('inspector.edit_reference')).attr('href', docs.editURL).call(svgIcon('#iD-icon-edit', 'inline'));
 
-	        button
-	            .call(svgIcon('#iD-icon-plus', 'pre-text'))
-	            .append('span')
-	            .attr('class', 'label')
-	            .text(_t('zoom_in_edit'));
+	    if (docs.wiki) {
+	      _body.append('a').attr('class', 'tag-reference-link').attr('target', '_blank').attr('href', docs.wiki.url).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').call(_t.append(docs.wiki.text));
+	    } // Add link to info about "good changeset comments" - #2923
 
 
-	        function disableTooHigh() {
-	            var canEdit = context.map().zoom() >= context.minEditableZoom();
-	            div.style('display', canEdit ? 'none' : 'block');
-	        }
+	    if (what.key === 'comment') {
+	      _body.append('a').attr('class', 'tag-reference-comment-link').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', _t('commit.about_changeset_comments_link')).append('span').call(_t.append('commit.about_changeset_comments'));
+	    }
+	  }
 
-	        context.map()
-	            .on('move.notice', debounce(disableTooHigh, 500));
+	  function done() {
+	    _loaded = true;
 
-	        disableTooHigh();
-	    };
-	}
+	    _button.classed('tag-reference-loading', false);
 
-	function uiPhotoviewer(context) {
+	    _body.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1');
 
-	    var dispatch$1 = dispatch('resize');
+	    _showing = true;
 
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	    _button.selectAll('svg.icon use').each(function () {
+	      var iconUse = select(this);
 
-	    function photoviewer(selection) {
-	        selection
-	            .append('button')
-	            .attr('class', 'thumb-hide')
-	            .on('click', function () {
-	                if (services.streetside) { services.streetside.hideViewer(context); }
-	                if (services.mapillary) { services.mapillary.hideViewer(context); }
-	                if (services.openstreetcam) { services.openstreetcam.hideViewer(context); }
-	            })
-	            .append('div')
-	            .call(svgIcon('#iD-icon-close'));
-
-	        function preventDefault() {
-	            event.preventDefault();
-	        }
-
-	        selection
-	            .append('button')
-	            .attr('class', 'resize-handle-xy')
-	            .on('touchstart touchdown touchend', preventDefault)
-	            .on(
-	                _pointerPrefix + 'down',
-	                buildResizeListener(selection, 'resize', dispatch$1, { resizeOnX: true, resizeOnY: true })
-	            );
-
-	        selection
-	            .append('button')
-	            .attr('class', 'resize-handle-x')
-	            .on('touchstart touchdown touchend', preventDefault)
-	            .on(
-	                _pointerPrefix + 'down',
-	                buildResizeListener(selection, 'resize', dispatch$1, { resizeOnX: true })
-	            );
-
-	        selection
-	            .append('button')
-	            .attr('class', 'resize-handle-y')
-	            .on('touchstart touchdown touchend', preventDefault)
-	            .on(
-	                _pointerPrefix + 'down',
-	                buildResizeListener(selection, 'resize', dispatch$1, { resizeOnY: true })
-	            );
-
-	        services.streetside.loadViewer(context);
-	        services.mapillary.loadViewer(context);
-	        services.openstreetcam.loadViewer(context);
-
-	        function buildResizeListener(target, eventName, dispatch, options) {
-
-	            var resizeOnX = !!options.resizeOnX;
-	            var resizeOnY = !!options.resizeOnY;
-	            var minHeight = options.minHeight || 240;
-	            var minWidth = options.minWidth || 320;
-	            var pointerId;
-	            var startX;
-	            var startY;
-	            var startWidth;
-	            var startHeight;
-
-	            function startResize() {
-	                if (pointerId !== (event.pointerId || 'mouse')) { return; }
-
-	                event.preventDefault();
-	                event.stopPropagation();
-
-	                var mapSize = context.map().dimensions();
-
-	                if (resizeOnX) {
-	                    var maxWidth = mapSize[0];
-	                    var newWidth = clamp((startWidth + event.clientX - startX), minWidth, maxWidth);
-	                    target.style('width', newWidth + 'px');
-	                }
+	      if (iconUse.attr('href') === '#iD-icon-info') {
+	        iconUse.attr('href', '#iD-icon-info-filled');
+	      }
+	    });
+	  }
 
-	                if (resizeOnY) {
-	                    var maxHeight = mapSize[1] - 90;  // preserve space at top/bottom of map
-	                    var newHeight = clamp((startHeight + startY - event.clientY), minHeight, maxHeight);
-	                    target.style('height', newHeight + 'px');
-	                }
+	  function hide() {
+	    _body.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
+	      _body.classed('expanded', false);
+	    });
 
-	                dispatch.call(eventName, target, utilGetDimensions(target, true));
-	            }
+	    _showing = false;
 
-	            function clamp(num, min, max) {
-	                return Math.max(min, Math.min(num, max));
-	            }
+	    _button.selectAll('svg.icon use').each(function () {
+	      var iconUse = select(this);
 
-	            function stopResize() {
-	                if (pointerId !== (event.pointerId || 'mouse')) { return; }
+	      if (iconUse.attr('href') === '#iD-icon-info-filled') {
+	        iconUse.attr('href', '#iD-icon-info');
+	      }
+	    });
+	  }
 
-	                event.preventDefault();
-	                event.stopPropagation();
+	  tagReference.button = function (selection, klass, iconName) {
+	    _button = selection.selectAll('.tag-reference-button').data([0]);
+	    _button = _button.enter().append('button').attr('class', 'tag-reference-button ' + (klass || '')).attr('title', _t('icons.information')).call(svgIcon('#iD-icon-' + (iconName || 'inspect'))).merge(_button);
 
-	                // remove all the listeners we added
-	                select(window)
-	                    .on('.' + eventName, null);
-	            }
+	    _button.on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	            return function initResize() {
-	                event.preventDefault();
-	                event.stopPropagation();
+	      if (_showing) {
+	        hide();
+	      } else if (_loaded) {
+	        done();
+	      } else {
+	        load();
+	      }
+	    });
+	  };
 
-	                pointerId = event.pointerId || 'mouse';
+	  tagReference.body = function (selection) {
+	    var itemID = what.qid || what.key + '-' + (what.value || '');
+	    _body = selection.selectAll('.tag-reference-body').data([itemID], function (d) {
+	      return d;
+	    });
 
-	                startX = event.clientX;
-	                startY = event.clientY;
-	                var targetRect = target.node().getBoundingClientRect();
-	                startWidth = targetRect.width;
-	                startHeight = targetRect.height;
+	    _body.exit().remove();
 
-	                select(window)
-	                    .on(_pointerPrefix + 'move.' + eventName, startResize, false)
-	                    .on(_pointerPrefix + 'up.' + eventName, stopResize, false);
+	    _body = _body.enter().append('div').attr('class', 'tag-reference-body').style('max-height', '0').style('opacity', '0').merge(_body);
 
-	                if (_pointerPrefix === 'pointer') {
-	                    select(window)
-	                        .on('pointercancel.' + eventName, stopResize, false);
-	                }
-	            };
-	        }
+	    if (_showing === false) {
+	      hide();
 	    }
+	  };
 
-	    photoviewer.onMapResize = function() {
-	        var photoviewer = context.container().select('.photoviewer');
-	        var content = context.container().select('.main-content');
-	        var mapDimensions = utilGetDimensions(content, true);
-	        // shrink photo viewer if it is too big
-	        // (-90 preserves space at top and bottom of map used by menus)
-	        var photoDimensions = utilGetDimensions(photoviewer, true);
-	        if (photoDimensions[0] > mapDimensions[0] || photoDimensions[1] > (mapDimensions[1] - 90)) {
-	            var setPhotoDimensions = [
-	                Math.min(photoDimensions[0], mapDimensions[0]),
-	                Math.min(photoDimensions[1], mapDimensions[1] - 90) ];
-
-	            photoviewer
-	                .style('width', setPhotoDimensions[0] + 'px')
-	                .style('height', setPhotoDimensions[1] + 'px');
-
-	            dispatch$1.call('resize', photoviewer, setPhotoDimensions);
-	        }
-	    };
+	  tagReference.showing = function (val) {
+	    if (!arguments.length) return _showing;
+	    _showing = val;
+	    return tagReference;
+	  };
 
-	    return utilRebind(photoviewer, dispatch$1, 'on');
+	  return tagReference;
 	}
 
-	function uiRestore(context) {
-	  return function(selection) {
-	    if (!context.history().hasRestorableChanges()) { return; }
+	// It borrows some code from uiHelp
 
-	    var modalSelection = uiModal(selection, true);
+	function uiFieldHelp(context, fieldName) {
+	  var fieldHelp = {};
 
-	    modalSelection.select('.modal')
-	      .attr('class', 'modal fillL');
+	  var _inspector = select(null);
 
-	    var introModal = modalSelection.select('.content');
+	  var _wrap = select(null);
 
-	    introModal
-	      .append('div')
-	      .attr('class', 'modal-section')
-	      .append('h3')
-	      .text(_t('restore.heading'));
-
-	    introModal
-	      .append('div')
-	      .attr('class','modal-section')
-	      .append('p')
-	      .text(_t('restore.description'));
-
-	    var buttonWrap = introModal
-	      .append('div')
-	      .attr('class', 'modal-actions');
-
-	    var restore = buttonWrap
-	      .append('button')
-	      .attr('class', 'restore')
-	      .on('click', function () {
-	        context.history().restore();
-	        modalSelection.remove();
-	      });
-
-	    restore
-	      .append('svg')
-	      .attr('class', 'logo logo-restore')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-restore');
-
-	    restore
-	      .append('div')
-	      .text(_t('restore.restore'));
-
-	    var reset = buttonWrap
-	      .append('button')
-	      .attr('class', 'reset')
-	      .on('click', function () {
-	        context.history().clearSaved();
-	        modalSelection.remove();
-	      });
-
-	    reset
-	      .append('svg')
-	      .attr('class', 'logo logo-reset')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-reset');
-
-	    reset
-	      .append('div')
-	      .text(_t('restore.reset'));
+	  var _body = select(null);
 
-	    restore.node().focus();
+	  var fieldHelpKeys = {
+	    restrictions: [['about', ['about', 'from_via_to', 'maxdist', 'maxvia']], ['inspecting', ['about', 'from_shadow', 'allow_shadow', 'restrict_shadow', 'only_shadow', 'restricted', 'only']], ['modifying', ['about', 'indicators', 'allow_turn', 'restrict_turn', 'only_turn']], ['tips', ['simple', 'simple_example', 'indirect', 'indirect_example', 'indirect_noedit']]]
 	  };
-	}
-
-	function uiScale(context) {
-	    var projection = context.projection,
-	        isImperial = !_mainLocalizer.usesMetric(),
-	        maxLength = 180,
-	        tickHeight = 8;
+	  var fieldHelpHeadings = {};
+	  var replacements = {
+	    distField: {
+	      html: _t.html('restriction.controls.distance')
+	    },
+	    viaField: {
+	      html: _t.html('restriction.controls.via')
+	    },
+	    fromShadow: {
+	      html: icon('#iD-turn-shadow', 'inline shadow from')
+	    },
+	    allowShadow: {
+	      html: icon('#iD-turn-shadow', 'inline shadow allow')
+	    },
+	    restrictShadow: {
+	      html: icon('#iD-turn-shadow', 'inline shadow restrict')
+	    },
+	    onlyShadow: {
+	      html: icon('#iD-turn-shadow', 'inline shadow only')
+	    },
+	    allowTurn: {
+	      html: icon('#iD-turn-yes', 'inline turn')
+	    },
+	    restrictTurn: {
+	      html: icon('#iD-turn-no', 'inline turn')
+	    },
+	    onlyTurn: {
+	      html: icon('#iD-turn-only', 'inline turn')
+	    }
+	  }; // For each section, squash all the texts into a single markdown document
 
+	  var docs = fieldHelpKeys[fieldName].map(function (key) {
+	    var helpkey = 'help.field.' + fieldName + '.' + key[0];
+	    var text = key[1].reduce(function (all, part) {
+	      var subkey = helpkey + '.' + part;
+	      var depth = fieldHelpHeadings[subkey]; // is this subkey a heading?
 
-	    function scaleDefs(loc1, loc2) {
-	        var lat = (loc2[1] + loc1[1]) / 2,
-	            conversion = (isImperial ? 3.28084 : 1),
-	            dist = geoLonToMeters(loc2[0] - loc1[0], lat) * conversion,
-	            scale = { dist: 0, px: 0, text: '' },
-	            buckets, i, val, dLon;
+	      var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
 
-	        if (isImperial) {
-	            buckets = [5280000, 528000, 52800, 5280, 500, 50, 5, 1];
-	        } else {
-	            buckets = [5000000, 500000, 50000, 5000, 500, 50, 5, 1];
-	        }
+	      return all + hhh + _t.html(subkey, replacements) + '\n\n';
+	    }, '');
+	    return {
+	      key: helpkey,
+	      title: _t.html(helpkey + '.title'),
+	      html: marked_1(text.trim())
+	    };
+	  });
 
-	        // determine a user-friendly endpoint for the scale
-	        for (i = 0; i < buckets.length; i++) {
-	            val = buckets[i];
-	            if (dist >= val) {
-	                scale.dist = Math.floor(dist / val) * val;
-	                break;
-	            } else {
-	                scale.dist = +dist.toFixed(2);
-	            }
-	        }
+	  function show() {
+	    updatePosition();
 
-	        dLon = geoMetersToLon(scale.dist / conversion, lat);
-	        scale.px = Math.round(projection([loc1[0] + dLon, loc1[1]])[0]);
+	    _body.classed('hide', false).style('opacity', '0').transition().duration(200).style('opacity', '1');
+	  }
 
-	        scale.text = displayLength(scale.dist / conversion, isImperial);
+	  function hide() {
+	    _body.classed('hide', true).transition().duration(200).style('opacity', '0').on('end', function () {
+	      _body.classed('hide', true);
+	    });
+	  }
 
-	        return scale;
-	    }
+	  function clickHelp(index) {
+	    var d = docs[index];
+	    var tkeys = fieldHelpKeys[fieldName][index][1];
 
+	    _body.selectAll('.field-help-nav-item').classed('active', function (d, i) {
+	      return i === index;
+	    });
 
-	    function update(selection) {
-	        // choose loc1, loc2 along bottom of viewport (near where the scale will be drawn)
-	        var dims = context.map().dimensions(),
-	            loc1 = projection.invert([0, dims[1]]),
-	            loc2 = projection.invert([maxLength, dims[1]]),
-	            scale = scaleDefs(loc1, loc2);
+	    var content = _body.selectAll('.field-help-content').html(d.html); // class the paragraphs so we can find and style them
 
-	        selection.select('.scale-path')
-	            .attr('d', 'M0.5,0.5v' + tickHeight + 'h' + scale.px + 'v-' + tickHeight);
 
-	        selection.select('.scale-textgroup')
-	            .attr('transform', 'translate(' + (scale.px + 8) + ',' + tickHeight + ')');
+	    content.selectAll('p').attr('class', function (d, i) {
+	      return tkeys[i];
+	    }); // insert special content for certain help sections
 
-	        selection.select('.scale-text')
-	            .text(scale.text);
+	    if (d.key === 'help.field.restrictions.inspecting') {
+	      content.insert('img', 'p.from_shadow').attr('class', 'field-help-image cf').attr('src', context.imagePath('tr_inspect.gif'));
+	    } else if (d.key === 'help.field.restrictions.modifying') {
+	      content.insert('img', 'p.allow_turn').attr('class', 'field-help-image cf').attr('src', context.imagePath('tr_modify.gif'));
 	    }
+	  }
 
+	  fieldHelp.button = function (selection) {
+	    if (_body.empty()) return;
+	    var button = selection.selectAll('.field-help-button').data([0]); // enter/update
 
-	    return function(selection) {
-	        function switchUnits() {
-	            isImperial = !isImperial;
-	            selection.call(update);
-	        }
-
-	        var scalegroup = selection.append('svg')
-	            .attr('class', 'scale')
-	            .on('click', switchUnits)
-	            .append('g')
-	            .attr('transform', 'translate(10,11)');
+	    button.enter().append('button').attr('class', 'field-help-button').call(svgIcon('#iD-icon-help')).merge(button).on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
 
-	        scalegroup
-	            .append('path')
-	            .attr('class', 'scale-path');
+	      if (_body.classed('hide')) {
+	        show();
+	      } else {
+	        hide();
+	      }
+	    });
+	  };
 
-	        scalegroup
-	            .append('g')
-	            .attr('class', 'scale-textgroup')
-	            .append('text')
-	            .attr('class', 'scale-text');
+	  function updatePosition() {
+	    var wrap = _wrap.node();
 
-	        selection.call(update);
+	    var inspector = _inspector.node();
 
-	        context.map().on('move.scale', function() {
-	            update(selection);
-	        });
-	    };
-	}
+	    var wRect = wrap.getBoundingClientRect();
+	    var iRect = inspector.getBoundingClientRect();
 
-	function uiShortcuts(context) {
-	    var detected = utilDetect();
-	    var _activeTab = 0;
-	    var _modalSelection;
-	    var _selection = select(null);
+	    _body.style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
+	  }
 
+	  fieldHelp.body = function (selection) {
+	    // This control expects the field to have a form-field-input-wrap div
+	    _wrap = selection.selectAll('.form-field-input-wrap');
+	    if (_wrap.empty()) return; // absolute position relative to the inspector, so it "floats" above the fields
 
-	    context.keybinding()
-	        .on([_t('shortcuts.toggle.key'), '?'], function () {
-	            if (context.container().selectAll('.modal-shortcuts').size()) {  // already showing
-	                if (_modalSelection) {
-	                    _modalSelection.close();
-	                    _modalSelection = null;
-	                }
-	            } else {
-	                _modalSelection = uiModal(_selection);
-	                _modalSelection.call(shortcutsModal);
-	            }
-	        });
+	    _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
+	    if (_inspector.empty()) return;
+	    _body = _inspector.selectAll('.field-help-body').data([0]);
 
+	    var enter = _body.enter().append('div').attr('class', 'field-help-body hide'); // initially hidden
 
-	    function shortcutsModal(_modalSelection) {
-	        _modalSelection.select('.modal')
-	            .classed('modal-shortcuts', true);
 
-	        var content = _modalSelection.select('.content');
+	    var titleEnter = enter.append('div').attr('class', 'field-help-title cf');
+	    titleEnter.append('h2').attr('class', _mainLocalizer.textDirection() === 'rtl' ? 'fr' : 'fl').call(_t.append('help.field.' + fieldName + '.title'));
+	    titleEnter.append('button').attr('class', 'fr close').attr('title', _t('icons.close')).on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      hide();
+	    }).call(svgIcon('#iD-icon-close'));
+	    var navEnter = enter.append('div').attr('class', 'field-help-nav cf');
+	    var titles = docs.map(function (d) {
+	      return d.title;
+	    });
+	    navEnter.selectAll('.field-help-nav-item').data(titles).enter().append('div').attr('class', 'field-help-nav-item').html(function (d) {
+	      return d;
+	    }).on('click', function (d3_event, d) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      clickHelp(titles.indexOf(d));
+	    });
+	    enter.append('div').attr('class', 'field-help-content');
+	    _body = _body.merge(enter);
+	    clickHelp(0);
+	  };
 
-	        content
-	            .append('div')
-	            .attr('class', 'modal-section')
-	            .append('h3')
-	            .text(_t('shortcuts.title'));
+	  return fieldHelp;
+	}
 
-	        _mainFileFetcher.get('shortcuts')
-	            .then(function(data) { content.call(render, data); })
-	            .catch(function() { /* ignore */ });
-	    }
+	function uiFieldCheck(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var options = field.options;
+	  var values = [];
+	  var texts = [];
 
+	  var _tags;
 
-	    function render(selection, dataShortcuts) {
-	        var wrapper = selection
-	            .selectAll('.wrapper')
-	            .data([0]);
+	  var input = select(null);
+	  var text = select(null);
+	  var label = select(null);
+	  var reverser = select(null);
 
-	        var wrapperEnter = wrapper
-	            .enter()
-	            .append('div')
-	            .attr('class', 'wrapper modal-section');
+	  var _impliedYes;
 
-	        var tabsBar = wrapperEnter
-	            .append('div')
-	            .attr('class', 'tabs-bar');
+	  var _entityIDs = [];
 
-	        var shortcutsList = wrapperEnter
-	            .append('div')
-	            .attr('class', 'shortcuts-list');
+	  var _value;
 
-	        wrapper = wrapper.merge(wrapperEnter);
+	  if (options) {
+	    for (var i in options) {
+	      var v = options[i];
+	      values.push(v === 'undefined' ? undefined : v);
+	      texts.push(field.t.html('options.' + v, {
+	        'default': v
+	      }));
+	    }
+	  } else {
+	    values = [undefined, 'yes'];
+	    texts = [_t.html('inspector.unknown'), _t.html('inspector.check.yes')];
 
-	        var tabs = tabsBar
-	            .selectAll('.tab')
-	            .data(dataShortcuts);
+	    if (field.type !== 'defaultCheck') {
+	      values.push('no');
+	      texts.push(_t.html('inspector.check.no'));
+	    }
+	  } // Checks tags to see whether an undefined value is "Assumed to be Yes"
 
-	        var tabsEnter = tabs
-	            .enter()
-	            .append('div')
-	            .attr('class', 'tab')
-	            .on('click', function (d, i) {
-	                _activeTab = i;
-	                render(selection, dataShortcuts);
-	            });
 
-	        tabsEnter
-	            .append('span')
-	            .text(function (d) { return _t(d.text); });
+	  function checkImpliedYes() {
+	    _impliedYes = field.id === 'oneway_yes'; // hack: pretend `oneway` field is a `oneway_yes` field
+	    // where implied oneway tag exists (e.g. `junction=roundabout`) #2220, #1841
 
-	        tabs = tabs
-	            .merge(tabsEnter);
+	    if (field.id === 'oneway') {
+	      var entity = context.entity(_entityIDs[0]);
 
-	        // Update
-	        wrapper.selectAll('.tab')
-	            .classed('active', function (d, i) {
-	                return i === _activeTab;
-	            });
+	      for (var key in entity.tags) {
+	        if (key in osmOneWayTags && entity.tags[key] in osmOneWayTags[key]) {
+	          _impliedYes = true;
+	          texts[0] = _t.html('_tagging.presets.fields.oneway_yes.options.undefined');
+	          break;
+	        }
+	      }
+	    }
+	  }
 
+	  function reverserHidden() {
+	    if (!context.container().select('div.inspector-hover').empty()) return true;
+	    return !(_value === 'yes' || _impliedYes && !_value);
+	  }
 
-	        var shortcuts = shortcutsList
-	            .selectAll('.shortcut-tab')
-	            .data(dataShortcuts);
+	  function reverserSetText(selection) {
+	    var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
+	    if (reverserHidden() || !entity) return selection;
+	    var first = entity.first();
+	    var last = entity.isClosed() ? entity.nodes[entity.nodes.length - 2] : entity.last();
+	    var pseudoDirection = first < last;
+	    var icon = pseudoDirection ? '#iD-icon-forward' : '#iD-icon-backward';
+	    selection.selectAll('.reverser-span').html('').call(_t.append('inspector.check.reverser')).call(svgIcon(icon, 'inline'));
+	    return selection;
+	  }
 
-	        var shortcutsEnter = shortcuts
-	            .enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'shortcut-tab shortcut-tab-' + d.tab; });
+	  var check = function check(selection) {
+	    checkImpliedYes();
+	    label = selection.selectAll('.form-field-input-wrap').data([0]);
+	    var enter = label.enter().append('label').attr('class', 'form-field-input-wrap form-field-input-check');
+	    enter.append('input').property('indeterminate', field.type !== 'defaultCheck').attr('type', 'checkbox').attr('id', field.domId);
+	    enter.append('span').html(texts[0]).attr('class', 'value');
 
-	        var columnsEnter = shortcutsEnter
-	            .selectAll('.shortcut-column')
-	            .data(function (d) { return d.columns; })
-	            .enter()
-	            .append('table')
-	            .attr('class', 'shortcut-column');
+	    if (field.type === 'onewayCheck') {
+	      enter.append('button').attr('class', 'reverser' + (reverserHidden() ? ' hide' : '')).append('span').attr('class', 'reverser-span');
+	    }
 
-	        var rowsEnter = columnsEnter
-	            .selectAll('.shortcut-row')
-	            .data(function (d) { return d.rows; })
-	            .enter()
-	            .append('tr')
-	            .attr('class', 'shortcut-row');
+	    label = label.merge(enter);
+	    input = label.selectAll('input');
+	    text = label.selectAll('span.value');
+	    input.on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      var t = {};
 
+	      if (Array.isArray(_tags[field.key])) {
+	        if (values.indexOf('yes') !== -1) {
+	          t[field.key] = 'yes';
+	        } else {
+	          t[field.key] = values[0];
+	        }
+	      } else {
+	        t[field.key] = values[(values.indexOf(_value) + 1) % values.length];
+	      } // Don't cycle through `alternating` or `reversible` states - #4970
+	      // (They are supported as translated strings, but should not toggle with clicks)
 
-	        var sectionRows = rowsEnter
-	            .filter(function (d) { return !d.shortcuts; });
 
-	        sectionRows
-	            .append('td');
+	      if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
+	        t[field.key] = values[0];
+	      }
 
-	        sectionRows
-	            .append('td')
-	            .attr('class', 'shortcut-section')
-	            .append('h3')
-	            .text(function (d) { return _t(d.text); });
+	      dispatch.call('change', this, t);
+	    });
 
+	    if (field.type === 'onewayCheck') {
+	      reverser = label.selectAll('.reverser');
+	      reverser.call(reverserSetText).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        context.perform(function (graph) {
+	          for (var i in _entityIDs) {
+	            graph = actionReverse(_entityIDs[i])(graph);
+	          }
 
-	        var shortcutRows = rowsEnter
-	            .filter(function (d) { return d.shortcuts; });
+	          return graph;
+	        }, _t('operations.reverse.annotation.line', {
+	          n: 1
+	        })); // must manually revalidate since no 'change' event was called
 
-	        var shortcutKeys = shortcutRows
-	            .append('td')
-	            .attr('class', 'shortcut-keys');
+	        context.validator().validate();
+	        select(this).call(reverserSetText);
+	      });
+	    }
+	  };
 
-	        var modifierKeys = shortcutKeys
-	            .filter(function (d) { return d.modifiers; });
+	  check.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return check;
+	  };
 
-	        modifierKeys
-	            .selectAll('kbd.modifier')
-	            .data(function (d) {
-	                if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
-	                    return ['⌘'];
-	                } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
-	                    return [];
-	                } else {
-	                    return d.modifiers;
-	                }
-	            })
-	            .enter()
-	            .each(function () {
-	                var selection = select(this);
+	  check.tags = function (tags) {
+	    _tags = tags;
 
-	                selection
-	                    .append('kbd')
-	                    .attr('class', 'modifier')
-	                    .text(function (d) { return uiCmd.display(d); });
+	    function isChecked(val) {
+	      return val !== 'no' && val !== '' && val !== undefined && val !== null;
+	    }
 
-	                selection
-	                    .append('span')
-	                    .text('+');
-	            });
+	    function textFor(val) {
+	      if (val === '') val = undefined;
+	      var index = values.indexOf(val);
+	      return index !== -1 ? texts[index] : '"' + val + '"';
+	    }
 
+	    checkImpliedYes();
+	    var isMixed = Array.isArray(tags[field.key]);
+	    _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
 
-	        shortcutKeys
-	            .selectAll('kbd.shortcut')
-	            .data(function (d) {
-	                var arr = d.shortcuts;
-	                if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
-	                    arr = ['Y'];
-	                } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
-	                    arr = ['F11'];
-	                }
+	    if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
+	      _value = 'yes';
+	    }
 
-	                // replace translations
-	                arr = arr.map(function(s) {
-	                    return uiCmd.display(s.indexOf('.') !== -1 ? _t(s) : s);
-	                });
+	    input.property('indeterminate', isMixed || field.type !== 'defaultCheck' && !_value).property('checked', isChecked(_value));
+	    text.html(isMixed ? _t.html('inspector.multiple_values') : textFor(_value)).classed('mixed', isMixed);
+	    label.classed('set', !!_value);
 
-	                return utilArrayUniq(arr).map(function(s) {
-	                    return {
-	                        shortcut: s,
-	                        separator: d.separator,
-	                        suffix: d.suffix
-	                    };
-	                });
-	            })
-	            .enter()
-	            .each(function (d, i, nodes) {
-	                var selection = select(this);
-	                var click = d.shortcut.toLowerCase().match(/(.*).click/);
-
-	                if (click && click[1]) {   // replace "left_click", "right_click" with mouse icon
-	                    selection
-	                        .call(svgIcon('#iD-walkthrough-mouse-' + click[1], 'operation'));
-	                } else if (d.shortcut.toLowerCase() === 'long-press') {
-	                    selection
-	                        .call(svgIcon('#iD-walkthrough-longpress', 'longpress operation'));
-	                } else if (d.shortcut.toLowerCase() === 'tap') {
-	                    selection
-	                        .call(svgIcon('#iD-walkthrough-tap', 'tap operation'));
-	                } else {
-	                    selection
-	                        .append('kbd')
-	                        .attr('class', 'shortcut')
-	                        .text(function (d) { return d.shortcut; });
-	                }
+	    if (field.type === 'onewayCheck') {
+	      reverser.classed('hide', reverserHidden()).call(reverserSetText);
+	    }
+	  };
 
-	                if (i < nodes.length - 1) {
-	                    selection
-	                        .append('span')
-	                        .text(d.separator || '\u00a0' + _t('shortcuts.or') + '\u00a0');
-	                } else if (i === nodes.length - 1 && d.suffix) {
-	                    selection
-	                        .append('span')
-	                        .text(d.suffix);
-	                }
-	            });
+	  check.focus = function () {
+	    input.node().focus();
+	  };
 
+	  return utilRebind(check, dispatch, 'on');
+	}
 
-	        shortcutKeys
-	            .filter(function(d) { return d.gesture; })
-	            .each(function () {
-	                var selection = select(this);
+	function uiFieldCombo(field, context) {
+	  var dispatch = dispatch$8('change');
 
-	                selection
-	                    .append('span')
-	                    .text('+');
+	  var _isMulti = field.type === 'multiCombo' || field.type === 'manyCombo';
 
-	                selection
-	                    .append('span')
-	                    .attr('class', 'gesture')
-	                    .text(function (d) { return _t(d.gesture); });
-	            });
+	  var _isNetwork = field.type === 'networkCombo';
 
+	  var _isSemi = field.type === 'semiCombo';
 
-	        shortcutRows
-	            .append('td')
-	            .attr('class', 'shortcut-desc')
-	            .text(function (d) { return d.text ? _t(d.text) : '\u00a0'; });
+	  var _optarray = field.options;
 
+	  var _showTagInfoSuggestions = field.type !== 'manyCombo' && field.autoSuggestions !== false;
 
-	        shortcuts = shortcuts
-	            .merge(shortcutsEnter);
+	  var _allowCustomValues = field.type !== 'manyCombo' && field.customValues !== false;
 
-	        // Update
-	        wrapper.selectAll('.shortcut-tab')
-	            .style('display', function (d, i) {
-	                return i === _activeTab ? 'flex' : 'none';
-	            });
-	    }
+	  var _snake_case = field.snake_case || field.snake_case === undefined;
 
+	  var _combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(field.caseSensitive).minItems(_isMulti || _isSemi ? 1 : 2);
 
-	    return function(selection, show) {
-	        _selection = selection;
-	        if (show) {
-	            _modalSelection = uiModal(selection);
-	            _modalSelection.call(shortcutsModal);
-	        }
-	    };
-	}
+	  var _container = select(null);
 
-	var pair_1 = pair;
+	  var _inputWrap = select(null);
 
+	  var _input = select(null);
 
-	function search(input, dims) {
-	  if (!dims) { dims = 'NSEW'; }
-	  if (typeof input !== 'string') { return null; }
+	  var _comboData = [];
+	  var _multiData = [];
+	  var _entityIDs = [];
 
-	  input = input.toUpperCase();
-	  var regex = /^[\s\,]*([NSEW])?\s*([\-|\—|\―]?[0-9.]+)[°º˚]?\s*(?:([0-9.]+)['’′‘]\s*)?(?:([0-9.]+)(?:''|"|”|″)\s*)?([NSEW])?/;
+	  var _tags;
 
-	  var m = input.match(regex);
-	  if (!m) { return null; }  // no match
+	  var _countryCode;
 
-	  var matched = m[0];
+	  var _staticPlaceholder; // initialize deprecated tags array
 
-	  // extract dimension.. m[1] = leading, m[5] = trailing
-	  var dim;
-	  if (m[1] && m[5]) {                 // if matched both..
-	    dim = m[1];                       // keep leading
-	    matched = matched.slice(0, -1);   // remove trailing dimension from match
-	  } else {
-	    dim = m[1] || m[5];
-	  }
 
-	  // if unrecognized dimension
-	  if (dim && dims.indexOf(dim) === -1) { return null; }
+	  var _dataDeprecated = [];
+	  _mainFileFetcher.get('deprecated').then(function (d) {
+	    _dataDeprecated = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  }); // ensure multiCombo field.key ends with a ':'
 
-	  // extract DMS
-	  var deg = m[2] ? parseFloat(m[2]) : 0;
-	  var min = m[3] ? parseFloat(m[3]) / 60 : 0;
-	  var sec = m[4] ? parseFloat(m[4]) / 3600 : 0;
-	  var sign = (deg < 0) ? -1 : 1;
-	  if (dim === 'S' || dim === 'W') { sign *= -1; }
+	  if (_isMulti && field.key && /[^:]$/.test(field.key)) {
+	    field.key += ':';
+	  }
 
-	  return {
-	    val: (Math.abs(deg) + min + sec) * sign,
-	    dim: dim,
-	    matched: matched,
-	    remain: input.slice(matched.length)
-	  };
-	}
+	  function snake(s) {
+	    return s.replace(/\s+/g, '_').toLowerCase();
+	  }
 
+	  function clean(s) {
+	    return s.split(';').map(function (s) {
+	      return s.trim();
+	    }).join(';');
+	  } // returns the tag value for a display value
+	  // (for multiCombo, dval should be the key suffix, not the entire key)
 
-	function pair(input, dims) {
-	  input = input.trim();
-	  var one = search(input, dims);
-	  if (!one) { return null; }
 
-	  input = one.remain.trim();
-	  var two = search(input, dims);
-	  if (!two || two.remain) { return null; }
+	  function tagValue(dval) {
+	    dval = clean(dval || '');
 
-	  if (one.dim) {
-	    return swapdim(one.val, two.val, one.dim);
-	  } else {
-	    return [one.val, two.val];
-	  }
-	}
+	    var found = _comboData.find(function (o) {
+	      return o.key && clean(o.value) === dval;
+	    });
 
+	    if (found) return found.key;
 
-	function swapdim(a, b, dim) {
-	  if (dim === 'N' || dim === 'S') { return [a, b]; }
-	  if (dim === 'W' || dim === 'E') { return [b, a]; }
-	}
+	    if (field.type === 'typeCombo' && !dval) {
+	      return 'yes';
+	    }
 
-	function uiFeatureList(context) {
-	    var _geocodeResults;
+	    return (_snake_case ? snake(dval) : dval) || undefined;
+	  } // returns the display value for a tag value
+	  // (for multiCombo, tval should be the key suffix, not the entire key)
 
 
-	    function featureList(selection) {
-	        var header = selection
-	            .append('div')
-	            .attr('class', 'header fillL cf');
+	  function displayValue(tval) {
+	    tval = tval || '';
 
-	        header
-	            .append('h3')
-	            .text(_t('inspector.feature_list'));
+	    if (field.hasTextForStringId('options.' + tval)) {
+	      return field.t('options.' + tval, {
+	        "default": tval
+	      });
+	    }
 
-	        var searchWrap = selection
-	            .append('div')
-	            .attr('class', 'search-header');
+	    if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
+	      return '';
+	    }
 
-	        var search = searchWrap
-	            .append('input')
-	            .attr('placeholder', _t('inspector.search'))
-	            .attr('type', 'search')
-	            .call(utilNoAuto)
-	            .on('keypress', keypress)
-	            .on('keydown', keydown)
-	            .on('input', inputevent);
+	    return tval;
+	  } // Compute the difference between arrays of objects by `value` property
+	  //
+	  // objectDifference([{value:1}, {value:2}, {value:3}], [{value:2}])
+	  // > [{value:1}, {value:3}]
+	  //
 
-	        searchWrap
-	            .call(svgIcon('#iD-icon-search', 'pre-text'));
 
-	        var listWrap = selection
-	            .append('div')
-	            .attr('class', 'inspector-body');
+	  function objectDifference(a, b) {
+	    return a.filter(function (d1) {
+	      return !b.some(function (d2) {
+	        return !d2.isMixed && d1.value === d2.value;
+	      });
+	    });
+	  }
 
-	        var list = listWrap
-	            .append('div')
-	            .attr('class', 'feature-list cf');
+	  function initCombo(selection, attachTo) {
+	    if (!_allowCustomValues) {
+	      selection.attr('readonly', 'readonly');
+	    }
 
-	        context
-	            .on('exit.feature-list', clearSearch);
-	        context.map()
-	            .on('drawn.feature-list', mapDrawn);
+	    if (_showTagInfoSuggestions && services.taginfo) {
+	      selection.call(_combobox.fetcher(setTaginfoValues), attachTo);
+	      setTaginfoValues('', setPlaceholder);
+	    } else {
+	      selection.call(_combobox, attachTo);
+	      setStaticValues(setPlaceholder);
+	    }
+	  }
 
-	        context.keybinding()
-	            .on(uiCmd('⌘F'), focusSearch);
+	  function setStaticValues(callback) {
+	    if (!_optarray) return;
+	    _comboData = _optarray.map(function (v) {
+	      return {
+	        key: v,
+	        value: field.t('options.' + v, {
+	          "default": v
+	        }),
+	        title: v,
+	        display: field.t.html('options.' + v, {
+	          "default": v
+	        }),
+	        klass: field.hasTextForStringId('options.' + v) ? '' : 'raw-option'
+	      };
+	    });
 
+	    _combobox.data(objectDifference(_comboData, _multiData));
 
-	        function focusSearch() {
-	            var mode = context.mode() && context.mode().id;
-	            if (mode !== 'browse') { return; }
+	    if (callback) callback(_comboData);
+	  }
 
-	            event.preventDefault();
-	            search.node().focus();
-	        }
+	  function setTaginfoValues(q, callback) {
+	    var fn = _isMulti ? 'multikeys' : 'values';
+	    var query = (_isMulti ? field.key : '') + q;
+	    var hasCountryPrefix = _isNetwork && _countryCode && _countryCode.indexOf(q.toLowerCase()) === 0;
 
+	    if (hasCountryPrefix) {
+	      query = _countryCode + ':';
+	    }
 
-	        function keydown() {
-	            if (event.keyCode === 27) {  // escape
-	                search.node().blur();
-	            }
-	        }
+	    var params = {
+	      debounce: q !== '',
+	      key: field.key,
+	      query: query
+	    };
 
+	    if (_entityIDs.length) {
+	      params.geometry = context.graph().geometry(_entityIDs[0]);
+	    }
 
-	        function keypress() {
-	            var q = search.property('value'),
-	                items = list.selectAll('.feature-list-item');
-	            if (event.keyCode === 13 && q.length && items.size()) {  // return
-	                click(items.datum());
-	            }
-	        }
+	    services.taginfo[fn](params, function (err, data) {
+	      if (err) return;
+	      data = data.filter(function (d) {
+	        if (field.type === 'typeCombo' && d.value === 'yes') {
+	          // don't show the fallback value
+	          return false;
+	        } // don't show values with very low usage
 
 
-	        function inputevent() {
-	            _geocodeResults = undefined;
-	            drawList();
-	        }
+	        return !d.count || d.count > 10;
+	      });
+	      var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
 
+	      if (deprecatedValues) {
+	        // don't suggest deprecated tag values
+	        data = data.filter(function (d) {
+	          return deprecatedValues.indexOf(d.value) === -1;
+	        });
+	      }
 
-	        function clearSearch() {
-	            search.property('value', '');
-	            drawList();
-	        }
+	      if (hasCountryPrefix) {
+	        data = data.filter(function (d) {
+	          return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
+	        });
+	      } // hide the caret if there are no suggestions
 
 
-	        function mapDrawn(e) {
-	            if (e.full) {
-	                drawList();
-	            }
-	        }
+	      _container.classed('empty-combobox', data.length === 0);
 
+	      _comboData = data.map(function (d) {
+	        var k = d.value;
+	        if (_isMulti) k = k.replace(field.key, '');
+	        var label = field.t('options.' + k, {
+	          "default": k
+	        });
+	        return {
+	          key: k,
+	          value: label,
+	          display: field.t.html('options.' + k, {
+	            "default": k
+	          }),
+	          title: d.title || label,
+	          klass: field.hasTextForStringId('options.' + k) ? '' : 'raw-option'
+	        };
+	      });
+	      _comboData = objectDifference(_comboData, _multiData);
+	      if (callback) callback(_comboData);
+	    });
+	  }
 
-	        function features() {
-	            var result = [];
-	            var graph = context.graph();
-	            var visibleCenter = context.map().extent().center();
-	            var q = search.property('value').toLowerCase();
+	  function setPlaceholder(values) {
+	    if (_isMulti || _isSemi) {
+	      _staticPlaceholder = field.placeholder() || _t('inspector.add');
+	    } else {
+	      var vals = values.map(function (d) {
+	        return d.value;
+	      }).filter(function (s) {
+	        return s.length < 20;
+	      });
+	      var placeholders = vals.length > 1 ? vals : values.map(function (d) {
+	        return d.key;
+	      });
+	      _staticPlaceholder = field.placeholder() || placeholders.slice(0, 3).join(', ');
+	    }
 
-	            if (!q) { return result; }
+	    if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
+	      _staticPlaceholder += '…';
+	    }
 
-	            var idMatch = q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
+	    var ph;
 
-	            if (idMatch) {
-	                var elemType = idMatch[1].charAt(0);
-	                var elemId = idMatch[2];
-	                result.push({
-	                    id: elemType + elemId,
-	                    geometry: elemType === 'n' ? 'point' : elemType === 'w' ? 'line' : 'relation',
-	                    type: elemType === 'n' ? _t('inspector.node') : elemType === 'w' ? _t('inspector.way') : _t('inspector.relation'),
-	                    name: elemId
-	                });
-	            }
+	    if (!_isMulti && !_isSemi && _tags && Array.isArray(_tags[field.key])) {
+	      ph = _t('inspector.multiple_values');
+	    } else {
+	      ph = _staticPlaceholder;
+	    }
 
-	            var locationMatch = pair_1(q.toUpperCase()) || q.match(/^(-?\d+\.?\d*)\s+(-?\d+\.?\d*)$/);
+	    _container.selectAll('input').attr('placeholder', ph);
+	  }
 
-	            if (locationMatch) {
-	                var loc = [parseFloat(locationMatch[0]), parseFloat(locationMatch[1])];
-	                result.push({
-	                    id: -1,
-	                    geometry: 'point',
-	                    type: _t('inspector.location'),
-	                    name: dmsCoordinatePair([loc[1], loc[0]]),
-	                    location: loc
-	                });
-	            }
+	  function change() {
+	    var t = {};
+	    var val;
 
-	            var allEntities = graph.entities;
-	            var localResults = [];
-	            for (var id in allEntities) {
-	                var entity = allEntities[id];
-	                if (!entity) { continue; }
-
-	                var name = utilDisplayName(entity) || '';
-	                if (name.toLowerCase().indexOf(q) < 0) { continue; }
-
-	                var matched = _mainPresetIndex.match(entity, graph);
-	                var type = (matched && matched.name()) || utilDisplayType(entity.id);
-	                var extent = entity.extent(graph);
-	                var distance = extent ? geoSphericalDistance(visibleCenter, extent.center()) : 0;
-
-	                localResults.push({
-	                    id: entity.id,
-	                    entity: entity,
-	                    geometry: entity.geometry(graph),
-	                    type: type,
-	                    name: name,
-	                    distance: distance
-	                });
+	    if (_isMulti || _isSemi) {
+	      val = tagValue(utilGetSetValue(_input).replace(/,/g, ';')) || '';
 
-	                if (localResults.length > 100) { break; }
-	            }
-	            localResults = localResults.sort(function byDistance(a, b) {
-	                return a.distance - b.distance;
-	            });
-	            result = result.concat(localResults);
+	      _container.classed('active', false);
 
-	            (_geocodeResults || []).forEach(function(d) {
-	                if (d.osm_type && d.osm_id) {    // some results may be missing these - #1890
+	      utilGetSetValue(_input, '');
+	      var vals = val.split(';').filter(Boolean);
+	      if (!vals.length) return;
 
-	                    // Make a temporary osmEntity so we can preset match
-	                    // and better localize the search result - #4725
-	                    var id = osmEntity.id.fromOSM(d.osm_type, d.osm_id);
-	                    var tags = {};
-	                    tags[d.class] = d.type;
+	      if (_isMulti) {
+	        utilArrayUniq(vals).forEach(function (v) {
+	          var key = (field.key || '') + v;
 
-	                    var attrs = { id: id, type: d.osm_type, tags: tags };
-	                    if (d.osm_type === 'way') {   // for ways, add some fake closed nodes
-	                        attrs.nodes = ['a','a'];  // so that geometry area is possible
-	                    }
+	          if (_tags) {
+	            // don't set a multicombo value to 'yes' if it already has a non-'no' value
+	            // e.g. `language:de=main`
+	            var old = _tags[key];
+	            if (typeof old === 'string' && old.toLowerCase() !== 'no') return;
+	          }
 
-	                    var tempEntity = osmEntity(attrs);
-	                    var tempGraph = coreGraph([tempEntity]);
-	                    var matched = _mainPresetIndex.match(tempEntity, tempGraph);
-	                    var type = (matched && matched.name()) || utilDisplayType(id);
-
-	                    result.push({
-	                        id: tempEntity.id,
-	                        geometry: tempEntity.geometry(tempGraph),
-	                        type: type,
-	                        name: d.display_name,
-	                        extent: new geoExtent(
-	                            [parseFloat(d.boundingbox[3]), parseFloat(d.boundingbox[0])],
-	                            [parseFloat(d.boundingbox[2]), parseFloat(d.boundingbox[1])])
-	                    });
-	                }
-	            });
+	          key = context.cleanTagKey(key);
+	          field.keys.push(key);
+	          t[key] = 'yes';
+	        });
+	      } else if (_isSemi) {
+	        var arr = _multiData.map(function (d) {
+	          return d.key;
+	        });
 
-	            if (q.match(/^[0-9]+$/)) {
-	                // if query is just a number, possibly an OSM ID without a prefix
-	                result.push({
-	                    id: 'n' + q,
-	                    geometry: 'point',
-	                    type: _t('inspector.node'),
-	                    name: q
-	                });
-	                result.push({
-	                    id: 'w' + q,
-	                    geometry: 'line',
-	                    type: _t('inspector.way'),
-	                    name: q
-	                });
-	                result.push({
-	                    id: 'r' + q,
-	                    geometry: 'relation',
-	                    type: _t('inspector.relation'),
-	                    name: q
-	                });
-	            }
+	        arr = arr.concat(vals);
+	        t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
+	      }
 
-	            return result;
-	        }
+	      window.setTimeout(function () {
+	        _input.node().focus();
+	      }, 10);
+	    } else {
+	      var rawValue = utilGetSetValue(_input); // don't override multiple values with blank string
 
+	      if (!rawValue && Array.isArray(_tags[field.key])) return;
+	      val = context.cleanTagValue(tagValue(rawValue));
+	      t[field.key] = val || undefined;
+	    }
 
-	        function drawList() {
-	            var value = search.property('value');
-	            var results = features();
+	    dispatch.call('change', this, t);
+	  }
 
-	            list.classed('filtered', value.length);
+	  function removeMultikey(d3_event, d) {
+	    d3_event.preventDefault();
+	    d3_event.stopPropagation();
+	    var t = {};
 
-	            var resultsIndicator = list.selectAll('.no-results-item')
-	                .data([0])
-	                .enter()
-	                .append('button')
-	                .property('disabled', true)
-	                .attr('class', 'no-results-item')
-	                .call(svgIcon('#iD-icon-alert', 'pre-text'));
-
-	            resultsIndicator.append('span')
-	                .attr('class', 'entity-name');
-
-	            list.selectAll('.no-results-item .entity-name')
-	                .text(_t('geocoder.no_results_worldwide'));
-
-	            if (services.geocoder) {
-	              list.selectAll('.geocode-item')
-	                  .data([0])
-	                  .enter()
-	                  .append('button')
-	                  .attr('class', 'geocode-item')
-	                  .on('click', geocoderSearch)
-	                  .append('div')
-	                  .attr('class', 'label')
-	                  .append('span')
-	                  .attr('class', 'entity-name')
-	                  .text(_t('geocoder.search'));
-	            }
+	    if (_isMulti) {
+	      t[d.key] = undefined;
+	    } else if (_isSemi) {
+	      var arr = _multiData.map(function (md) {
+	        return md.key === d.key ? null : md.key;
+	      }).filter(Boolean);
 
-	            list.selectAll('.no-results-item')
-	                .style('display', (value.length && !results.length) ? 'block' : 'none');
+	      arr = utilArrayUniq(arr);
+	      t[field.key] = arr.length ? arr.join(';') : undefined;
+	    }
 
-	            list.selectAll('.geocode-item')
-	                .style('display', (value && _geocodeResults === undefined) ? 'block' : 'none');
+	    dispatch.call('change', this, t);
+	  }
 
-	            list.selectAll('.feature-list-item')
-	                .data([-1])
-	                .remove();
+	  function combo(selection) {
+	    _container = selection.selectAll('.form-field-input-wrap').data([0]);
+	    var type = _isMulti || _isSemi ? 'multicombo' : 'combo';
+	    _container = _container.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + type).merge(_container);
 
-	            var items = list.selectAll('.feature-list-item')
-	                .data(results, function(d) { return d.id; });
+	    if (_isMulti || _isSemi) {
+	      _container = _container.selectAll('.chiplist').data([0]);
+	      var listClass = 'chiplist'; // Use a separate line for each value in the Destinations and Via fields
+	      // to mimic highway exit signs
 
-	            var enter = items.enter()
-	                .insert('button', '.geocode-item')
-	                .attr('class', 'feature-list-item')
-	                .on('mouseover', mouseover)
-	                .on('mouseout', mouseout)
-	                .on('click', click);
+	      if (field.key === 'destination' || field.key === 'via') {
+	        listClass += ' full-line-chips';
+	      }
 
-	            var label = enter
-	                .append('div')
-	                .attr('class', 'label');
+	      _container = _container.enter().append('ul').attr('class', listClass).on('click', function () {
+	        window.setTimeout(function () {
+	          _input.node().focus();
+	        }, 10);
+	      }).merge(_container);
+	      _inputWrap = _container.selectAll('.input-wrap').data([0]);
+	      _inputWrap = _inputWrap.enter().append('li').attr('class', 'input-wrap').merge(_inputWrap);
+	      _input = _inputWrap.selectAll('input').data([0]);
+	    } else {
+	      _input = _container.selectAll('input').data([0]);
+	    }
 
-	            label
-	                .each(function(d) {
-	                    select(this)
-	                        .call(svgIcon('#iD-icon-' + d.geometry, 'pre-text'));
-	                });
+	    _input = _input.enter().append('input').attr('type', 'text').attr('id', field.domId).call(utilNoAuto).call(initCombo, selection).merge(_input);
 
-	            label
-	                .append('span')
-	                .attr('class', 'entity-type')
-	                .text(function(d) { return d.type; });
+	    if (_isNetwork) {
+	      var extent = combinedEntityExtent();
+	      var countryCode = extent && iso1A2Code(extent.center());
+	      _countryCode = countryCode && countryCode.toLowerCase();
+	    }
 
-	            label
-	                .append('span')
-	                .attr('class', 'entity-name')
-	                .text(function(d) { return d.name; });
+	    _input.on('change', change).on('blur', change);
 
-	            enter
-	                .style('opacity', 0)
-	                .transition()
-	                .style('opacity', 1);
+	    _input.on('keydown.field', function (d3_event) {
+	      switch (d3_event.keyCode) {
+	        case 13:
+	          // ↩ Return
+	          _input.node().blur(); // blurring also enters the value
 
-	            items.order();
 
-	            items.exit()
-	                .remove();
-	        }
+	          d3_event.stopPropagation();
+	          break;
+	      }
+	    });
 
+	    if (_isMulti || _isSemi) {
+	      _combobox.on('accept', function () {
+	        _input.node().blur();
 
-	        function mouseover(d) {
-	            if (d.id === -1) { return; }
+	        _input.node().focus();
+	      });
 
-	            utilHighlightEntities([d.id], true, context);
-	        }
+	      _input.on('focus', function () {
+	        _container.classed('active', true);
+	      });
+	    }
+	  }
 
+	  combo.tags = function (tags) {
+	    _tags = tags;
 
-	        function mouseout(d) {
-	            if (d.id === -1) { return; }
+	    if (_isMulti || _isSemi) {
+	      _multiData = [];
+	      var maxLength;
 
-	            utilHighlightEntities([d.id], false, context);
+	      if (_isMulti) {
+	        // Build _multiData array containing keys already set..
+	        for (var k in tags) {
+	          if (field.key && k.indexOf(field.key) !== 0) continue;
+	          if (!field.key && field.keys.indexOf(k) === -1) continue;
+	          var v = tags[k];
+	          if (!v || typeof v === 'string' && v.toLowerCase() === 'no') continue;
+	          var suffix = field.key ? k.substr(field.key.length) : k;
+
+	          _multiData.push({
+	            key: k,
+	            value: displayValue(suffix),
+	            isMixed: Array.isArray(v)
+	          });
 	        }
 
+	        if (field.key) {
+	          // Set keys for form-field modified (needed for undo and reset buttons)..
+	          field.keys = _multiData.map(function (d) {
+	            return d.key;
+	          }); // limit the input length so it fits after prepending the key prefix
 
-	        function click(d) {
-	            event.preventDefault();
-
-	            if (d.location) {
-	                context.map().centerZoomEase([d.location[1], d.location[0]], 19);
-
-	            } else if (d.entity) {
-	                utilHighlightEntities([d.id], false, context);
+	          maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
+	        } else {
+	          maxLength = context.maxCharsForTagKey();
+	        }
+	      } else if (_isSemi) {
+	        var allValues = [];
+	        var commonValues;
 
-	                context.enter(modeSelect(context, [d.entity.id]));
-	                context.map().zoomToEase(d.entity);
+	        if (Array.isArray(tags[field.key])) {
+	          tags[field.key].forEach(function (tagVal) {
+	            var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
+	            allValues = allValues.concat(thisVals);
 
+	            if (!commonValues) {
+	              commonValues = thisVals;
 	            } else {
-	                // download, zoom to, and select the entity with the given ID
-	                context.zoomToEntity(d.id);
+	              commonValues = commonValues.filter(function (value) {
+	                return thisVals.includes(value);
+	              });
 	            }
+	          });
+	          allValues = utilArrayUniq(allValues).filter(Boolean);
+	        } else {
+	          allValues = utilArrayUniq((tags[field.key] || '').split(';')).filter(Boolean);
+	          commonValues = allValues;
 	        }
 
+	        _multiData = allValues.map(function (v) {
+	          return {
+	            key: v,
+	            value: displayValue(v),
+	            isMixed: !commonValues.includes(v)
+	          };
+	        });
+	        var currLength = utilUnicodeCharsCount(commonValues.join(';')); // limit the input length to the remaining available characters
 
-	        function geocoderSearch() {
-	            services.geocoder.search(search.property('value'), function (err, resp) {
-	                _geocodeResults = resp || [];
-	                drawList();
-	            });
+	        maxLength = context.maxCharsForTagValue() - currLength;
+
+	        if (currLength > 0) {
+	          // account for the separator if a new value will be appended to existing
+	          maxLength -= 1;
 	        }
-	    }
+	      } // a negative maxlength doesn't make sense
 
 
-	    return featureList;
-	}
+	      maxLength = Math.max(0, maxLength);
+	      var allowDragAndDrop = _isSemi // only semiCombo values are ordered
+	      && !Array.isArray(tags[field.key]); // Exclude existing multikeys from combo options..
 
-	function uiSectionEntityIssues(context) {
+	      var available = objectDifference(_comboData, _multiData);
 
-	    var _entityIDs = [];
-	    var _issues = [];
-	    var _activeIssueID;
+	      _combobox.data(available); // Hide 'Add' button if this field uses fixed set of
+	      // options and they're all currently used,
+	      // or if the field is already at its character limit
 
-	    var section = uiSection('entity-issues', context)
-	        .shouldDisplay(function() {
-	            return _issues.length > 0;
-	        })
-	        .title(function() {
-	            return _t('issues.list_title', { count: _issues.length });
-	        })
-	        .disclosureContent(renderDisclosureContent);
 
-	    context.validator()
-	        .on('validated.entity_issues', function() {
-	            // Refresh on validated events
-	            reloadIssues();
-	            section.reRender();
-	        })
-	        .on('focusedIssue.entity_issues', function(issue) {
-	             makeActiveIssue(issue.id);
-	        });
+	      var hideAdd = !_allowCustomValues && !available.length || maxLength <= 0;
 
-	    function reloadIssues() {
-	        _issues = context.validator().getSharedEntityIssues(_entityIDs, { includeDisabledRules: true });
-	    }
+	      _container.selectAll('.chiplist .input-wrap').style('display', hideAdd ? 'none' : null); // Render chips
 
-	    function makeActiveIssue(issueID) {
-	        _activeIssueID = issueID;
-	        section.selection().selectAll('.issue-container')
-	            .classed('active', function(d) { return d.id === _activeIssueID; });
-	    }
 
-	    function renderDisclosureContent(selection) {
+	      var chips = _container.selectAll('.chip').data(_multiData);
+
+	      chips.exit().remove();
+	      var enter = chips.enter().insert('li', '.input-wrap').attr('class', 'chip');
+	      enter.append('span');
+	      enter.append('a');
+	      chips = chips.merge(enter).order().classed('raw-value', function (d) {
+	        var k = d.key;
+	        if (_isMulti) k = k.replace(field.key, '');
+	        return !field.hasTextForStringId('options.' + k);
+	      }).classed('draggable', allowDragAndDrop).classed('mixed', function (d) {
+	        return d.isMixed;
+	      }).attr('title', function (d) {
+	        return d.isMixed ? _t('inspector.unshared_value_tooltip') : null;
+	      });
 
-	        selection.classed('grouped-items-area', true);
+	      if (allowDragAndDrop) {
+	        registerDragAndDrop(chips);
+	      }
 
-	        _activeIssueID = _issues.length > 0 ? _issues[0].id : null;
+	      chips.select('span').text(function (d) {
+	        return d.value;
+	      });
+	      chips.select('a').attr('href', '#').on('click', removeMultikey).attr('class', 'remove').text('×');
+	    } else {
+	      var isMixed = Array.isArray(tags[field.key]);
+	      var mixedValues = isMixed && tags[field.key].map(function (val) {
+	        return displayValue(val);
+	      }).filter(Boolean);
+	      var showsValue = !isMixed && tags[field.key] && !(field.type === 'typeCombo' && tags[field.key] === 'yes');
+	      var isRawValue = showsValue && !field.hasTextForStringId('options.' + tags[field.key]);
+	      var isKnownValue = showsValue && !isRawValue;
+	      var isReadOnly = !_allowCustomValues || isKnownValue;
+	      utilGetSetValue(_input, !isMixed ? displayValue(tags[field.key]) : '').classed('raw-value', isRawValue).classed('known-value', isKnownValue).attr('readonly', isReadOnly ? 'readonly' : undefined).attr('title', isMixed ? mixedValues.join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : _staticPlaceholder || '').classed('mixed', isMixed).on('keydown.deleteCapture', function (d3_event) {
+	        if (isReadOnly && isKnownValue && (d3_event.keyCode === utilKeybinding.keyCodes['⌫'] || d3_event.keyCode === utilKeybinding.keyCodes['⌦'])) {
+	          d3_event.preventDefault();
+	          d3_event.stopPropagation();
+	          var t = {};
+	          t[field.key] = undefined;
+	          dispatch.call('change', this, t);
+	        }
+	      });
+	    }
+	  };
 
-	        var containers = selection.selectAll('.issue-container')
-	            .data(_issues, function(d) { return d.id; });
+	  function registerDragAndDrop(selection) {
+	    // allow drag and drop re-ordering of chips
+	    var dragOrigin, targetIndex;
+	    selection.call(d3_drag().on('start', function (d3_event) {
+	      dragOrigin = {
+	        x: d3_event.x,
+	        y: d3_event.y
+	      };
+	      targetIndex = null;
+	    }).on('drag', function (d3_event) {
+	      var x = d3_event.x - dragOrigin.x,
+	          y = d3_event.y - dragOrigin.y;
+	      if (!select(this).classed('dragging') && // don't display drag until dragging beyond a distance threshold
+	      Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) return;
+	      var index = selection.nodes().indexOf(this);
+	      select(this).classed('dragging', true);
+	      targetIndex = null;
+	      var targetIndexOffsetTop = null;
+	      var draggedTagWidth = select(this).node().offsetWidth;
+
+	      if (field.key === 'destination' || field.key === 'via') {
+	        // meaning tags are full width
+	        _container.selectAll('.chip').style('transform', function (d2, index2) {
+	          var node = select(this).node();
+
+	          if (index === index2) {
+	            return 'translate(' + x + 'px, ' + y + 'px)'; // move the dragged tag up the order
+	          } else if (index2 > index && d3_event.y > node.offsetTop) {
+	            if (targetIndex === null || index2 > targetIndex) {
+	              targetIndex = index2;
+	            }
+
+	            return 'translateY(-100%)'; // move the dragged tag down the order
+	          } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
+	            if (targetIndex === null || index2 < targetIndex) {
+	              targetIndex = index2;
+	            }
+
+	            return 'translateY(100%)';
+	          }
 
-	        // Exit
-	        containers.exit()
-	            .remove();
+	          return null;
+	        });
+	      } else {
+	        _container.selectAll('.chip').each(function (d2, index2) {
+	          var node = select(this).node(); // check the cursor is in the bounding box
 
-	        // Enter
-	        var containersEnter = containers.enter()
-	            .append('div')
-	            .attr('class', 'issue-container');
+	          if (index !== index2 && d3_event.x < node.offsetLeft + node.offsetWidth + 5 && d3_event.x > node.offsetLeft && d3_event.y < node.offsetTop + node.offsetHeight && d3_event.y > node.offsetTop) {
+	            targetIndex = index2;
+	            targetIndexOffsetTop = node.offsetTop;
+	          }
+	        }).style('transform', function (d2, index2) {
+	          var node = select(this).node();
 
+	          if (index === index2) {
+	            return 'translate(' + x + 'px, ' + y + 'px)';
+	          } // only translate tags in the same row
 
-	        var itemsEnter = containersEnter
-	            .append('div')
-	            .attr('class', function(d) { return 'issue severity-' + d.severity; })
-	            .on('mouseover.highlight', function(d) {
-	                // don't hover-highlight the selected entity
-	                var ids = d.entityIds
-	                    .filter(function(e) { return _entityIDs.indexOf(e) === -1; });
-
-	                utilHighlightEntities(ids, true, context);
-	            })
-	            .on('mouseout.highlight', function(d) {
-	                var ids = d.entityIds
-	                    .filter(function(e) { return _entityIDs.indexOf(e) === -1; });
-
-	                utilHighlightEntities(ids, false, context);
-	            });
 
-	        var labelsEnter = itemsEnter
-	            .append('div')
-	            .attr('class', 'issue-label')
-	            .on('click', function(d) {
+	          if (node.offsetTop === targetIndexOffsetTop) {
+	            if (index2 < index && index2 >= targetIndex) {
+	              return 'translateX(' + draggedTagWidth + 'px)';
+	            } else if (index2 > index && index2 <= targetIndex) {
+	              return 'translateX(-' + draggedTagWidth + 'px)';
+	            }
+	          }
 
-	                makeActiveIssue(d.id); // expand only the clicked item
+	          return null;
+	        });
+	      }
+	    }).on('end', function () {
+	      if (!select(this).classed('dragging')) {
+	        return;
+	      }
 
-	                var extent = d.extent(context.graph());
-	                if (extent) {
-	                    var setZoom = Math.max(context.map().zoom(), 19);
-	                    context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
-	                }
-	            });
+	      var index = selection.nodes().indexOf(this);
+	      select(this).classed('dragging', false);
 
-	        var textEnter = labelsEnter
-	            .append('span')
-	            .attr('class', 'issue-text');
-
-	        textEnter
-	            .append('span')
-	            .attr('class', 'issue-icon')
-	            .each(function(d) {
-	                var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
-	                select(this)
-	                    .call(svgIcon(iconName));
-	            });
+	      _container.selectAll('.chip').style('transform', null);
 
-	        textEnter
-	            .append('span')
-	            .attr('class', 'issue-message');
-
-
-	        var infoButton = labelsEnter
-	            .append('button')
-	            .attr('class', 'issue-info-button')
-	            .attr('title', _t('icons.information'))
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-inspect'));
-
-	        infoButton
-	            .on('click', function () {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                this.blur();    // avoid keeping focus on the button - #4641
-
-	                var container = select(this.parentNode.parentNode.parentNode);
-	                var info = container.selectAll('.issue-info');
-	                var isExpanded = info.classed('expanded');
-
-	                if (isExpanded) {
-	                    info
-	                        .transition()
-	                        .duration(200)
-	                        .style('max-height', '0px')
-	                        .style('opacity', '0')
-	                        .on('end', function () {
-	                            info.classed('expanded', false);
-	                        });
-	                } else {
-	                    info
-	                        .classed('expanded', true)
-	                        .transition()
-	                        .duration(200)
-	                        .style('max-height', '200px')
-	                        .style('opacity', '1')
-	                        .on('end', function () {
-	                            info.style('max-height', null);
-	                        });
-	                }
-	            });
+	      if (typeof targetIndex === 'number') {
+	        var element = _multiData[index];
 
-	        itemsEnter
-	            .append('ul')
-	            .attr('class', 'issue-fix-list');
+	        _multiData.splice(index, 1);
 
-	        containersEnter
-	            .append('div')
-	            .attr('class', 'issue-info')
-	            .style('max-height', '0')
-	            .style('opacity', '0')
-	            .each(function(d) {
-	                if (typeof d.reference === 'function') {
-	                    select(this)
-	                        .call(d.reference);
-	                } else {
-	                    select(this)
-	                        .text(_t('inspector.no_documentation_key'));
-	                }
-	            });
+	        _multiData.splice(targetIndex, 0, element);
 
+	        var t = {};
 
-	        // Update
-	        containers = containers
-	            .merge(containersEnter)
-	            .classed('active', function(d) { return d.id === _activeIssueID; });
+	        if (_multiData.length) {
+	          t[field.key] = _multiData.map(function (element) {
+	            return element.key;
+	          }).join(';');
+	        } else {
+	          t[field.key] = undefined;
+	        }
 
-	        containers.selectAll('.issue-message')
-	            .text(function(d) {
-	                return d.message(context);
-	            });
+	        dispatch.call('change', this, t);
+	      }
 
-	        // fixes
-	        var fixLists = containers.selectAll('.issue-fix-list');
+	      dragOrigin = undefined;
+	      targetIndex = undefined;
+	    }));
+	  }
 
-	        var fixes = fixLists.selectAll('.issue-fix-item')
-	            .data(function(d) { return d.fixes ? d.fixes(context) : []; }, function(fix) { return fix.id; });
+	  combo.focus = function () {
+	    _input.node().focus();
+	  };
 
-	        fixes.exit()
-	            .remove();
+	  combo.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return combo;
+	  };
 
-	        var fixesEnter = fixes.enter()
-	            .append('li')
-	            .attr('class', 'issue-fix-item')
-	            .on('click', function(d) {
-	                // not all fixes are actionable
-	                if (!select(this).classed('actionable') || !d.onClick) { return; }
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	                // Don't run another fix for this issue within a second of running one
-	                // (Necessary for "Select a feature type" fix. Most fixes should only ever run once)
-	                if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) { return; }
-	                d.issue.dateLastRanFix = new Date();
+	  return utilRebind(combo, dispatch, 'on');
+	}
 
-	                // remove hover-highlighting
-	                utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
+	// based on https://github.com/bestiejs/punycode.js/blob/master/punycode.js
+	var global$2 = global$1o;
+	var uncurryThis$1 = functionUncurryThis;
 
-	                new Promise(function(resolve, reject) {
-	                    d.onClick(context, resolve, reject);
-	                    if (d.onClick.length <= 1) {
-	                        // if the fix doesn't take any completion parameters then consider it resolved
-	                        resolve();
-	                    }
-	                })
-	                .then(function() {
-	                    // revalidate whenever the fix has finished running successfully
-	                    context.validator().validate();
-	                });
-	            })
-	            .on('mouseover.highlight', function(d) {
-	                utilHighlightEntities(d.entityIds, true, context);
-	            })
-	            .on('mouseout.highlight', function(d) {
-	                utilHighlightEntities(d.entityIds, false, context);
-	            });
+	var maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1
+	var base = 36;
+	var tMin = 1;
+	var tMax = 26;
+	var skew = 38;
+	var damp = 700;
+	var initialBias = 72;
+	var initialN = 128; // 0x80
+	var delimiter = '-'; // '\x2D'
+	var regexNonASCII = /[^\0-\u007E]/; // non-ASCII chars
+	var regexSeparators = /[.\u3002\uFF0E\uFF61]/g; // RFC 3490 separators
+	var OVERFLOW_ERROR = 'Overflow: input needs wider integers to process';
+	var baseMinusTMin = base - tMin;
 
-	        fixesEnter
-	            .append('span')
-	            .attr('class', 'fix-icon')
-	            .each(function(d) {
-	                var iconName = d.icon || 'iD-icon-wrench';
-	                if (iconName.startsWith('maki')) {
-	                    iconName += '-15';
-	                }
-	                select(this).call(svgIcon('#' + iconName));
-	            });
+	var RangeError$1 = global$2.RangeError;
+	var exec$1 = uncurryThis$1(regexSeparators.exec);
+	var floor$1 = Math.floor;
+	var fromCharCode = String.fromCharCode;
+	var charCodeAt = uncurryThis$1(''.charCodeAt);
+	var join$1 = uncurryThis$1([].join);
+	var push$1 = uncurryThis$1([].push);
+	var replace$1 = uncurryThis$1(''.replace);
+	var split$1 = uncurryThis$1(''.split);
+	var toLowerCase$1 = uncurryThis$1(''.toLowerCase);
 
-	        fixesEnter
-	            .append('span')
-	            .attr('class', 'fix-message')
-	            .text(function(d) { return d.title; });
-
-	        fixesEnter.merge(fixes)
-	            .classed('actionable', function(d) {
-	                return d.onClick;
-	            })
-	            .attr('title', function(d) {
-	                if (d.disabledReason) {
-	                    return d.disabledReason;
-	                }
-	                return null;
-	            });
+	/**
+	 * Creates an array containing the numeric code points of each Unicode
+	 * character in the string. While JavaScript uses UCS-2 internally,
+	 * this function will convert a pair of surrogate halves (each of which
+	 * UCS-2 exposes as separate characters) into a single code point,
+	 * matching UTF-16.
+	 */
+	var ucs2decode = function (string) {
+	  var output = [];
+	  var counter = 0;
+	  var length = string.length;
+	  while (counter < length) {
+	    var value = charCodeAt(string, counter++);
+	    if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
+	      // It's a high surrogate, and there is a next character.
+	      var extra = charCodeAt(string, counter++);
+	      if ((extra & 0xFC00) == 0xDC00) { // Low surrogate.
+	        push$1(output, ((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
+	      } else {
+	        // It's an unmatched surrogate; only append this code unit, in case the
+	        // next code unit is the high surrogate of a surrogate pair.
+	        push$1(output, value);
+	        counter--;
+	      }
+	    } else {
+	      push$1(output, value);
 	    }
+	  }
+	  return output;
+	};
+
+	/**
+	 * Converts a digit/integer into a basic code point.
+	 */
+	var digitToBasic = function (digit) {
+	  //  0..25 map to ASCII a..z or A..Z
+	  // 26..35 map to ASCII 0..9
+	  return digit + 22 + 75 * (digit < 26);
+	};
+
+	/**
+	 * Bias adaptation function as per section 3.4 of RFC 3492.
+	 * https://tools.ietf.org/html/rfc3492#section-3.4
+	 */
+	var adapt = function (delta, numPoints, firstTime) {
+	  var k = 0;
+	  delta = firstTime ? floor$1(delta / damp) : delta >> 1;
+	  delta += floor$1(delta / numPoints);
+	  while (delta > baseMinusTMin * tMax >> 1) {
+	    delta = floor$1(delta / baseMinusTMin);
+	    k += base;
+	  }
+	  return floor$1(k + (baseMinusTMin + 1) * delta / (delta + skew));
+	};
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-	            _entityIDs = val;
-	            _activeIssueID = null;
-	            reloadIssues();
-	        }
-	        return section;
-	    };
+	/**
+	 * Converts a string of Unicode symbols (e.g. a domain name label) to a
+	 * Punycode string of ASCII-only symbols.
+	 */
+	var encode = function (input) {
+	  var output = [];
 
-	    return section;
-	}
+	  // Convert the input in UCS-2 to an array of Unicode code points.
+	  input = ucs2decode(input);
 
-	function uiPresetIcon() {
-	  var _preset;
-	  var _geometry;
-	  var _sizeClass = 'medium';
+	  // Cache the length.
+	  var inputLength = input.length;
 
+	  // Initialize the state.
+	  var n = initialN;
+	  var delta = 0;
+	  var bias = initialBias;
+	  var i, currentValue;
 
-	  function isSmall() {
-	    return _sizeClass === 'small';
+	  // Handle the basic code points.
+	  for (i = 0; i < input.length; i++) {
+	    currentValue = input[i];
+	    if (currentValue < 0x80) {
+	      push$1(output, fromCharCode(currentValue));
+	    }
 	  }
 
+	  var basicLength = output.length; // number of basic code points.
+	  var handledCPCount = basicLength; // number of code points that have been handled;
 
-	  function presetIcon(selection) {
-	    selection.each(render);
+	  // Finish the basic string with a delimiter unless it's empty.
+	  if (basicLength) {
+	    push$1(output, delimiter);
 	  }
 
+	  // Main encoding loop:
+	  while (handledCPCount < inputLength) {
+	    // All non-basic code points < n have been handled already. Find the next larger one:
+	    var m = maxInt;
+	    for (i = 0; i < input.length; i++) {
+	      currentValue = input[i];
+	      if (currentValue >= n && currentValue < m) {
+	        m = currentValue;
+	      }
+	    }
 
-	  function getIcon(p, geom) {
-	    if (isSmall() && p.isFallback && p.isFallback())
-	      { return 'iD-icon-' + p.id; }
-	    else if (p.icon)
-	      { return p.icon; }
-	    else if (geom === 'line')
-	      { return 'iD-other-line'; }
-	    else if (geom === 'vertex')
-	      { return p.isFallback() ? '' : 'temaki-vertex'; }
-	    else if (isSmall() && geom === 'point')
-	      { return ''; }
-	    else
-	      { return 'maki-marker-stroked'; }
-	  }
-
-
-	  function renderPointBorder(enter) {
-	    var w = 40;
-	    var h = 40;
-
-	    enter
-	      .append('svg')
-	      .attr('class', 'preset-icon-fill preset-icon-point-border')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h))
-	      .append('path')
-	      .attr('transform', 'translate(11.5, 8)')
-	      .attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
-	  }
+	    // Increase `delta` enough to advance the decoder's <n,i> state to <m,0>, but guard against overflow.
+	    var handledCPCountPlusOne = handledCPCount + 1;
+	    if (m - n > floor$1((maxInt - delta) / handledCPCountPlusOne)) {
+	      throw RangeError$1(OVERFLOW_ERROR);
+	    }
 
+	    delta += (m - n) * handledCPCountPlusOne;
+	    n = m;
 
-	  function renderCircleFill(fillEnter) {
-	    var w = 60;
-	    var h = 60;
-	    var d = 40;
+	    for (i = 0; i < input.length; i++) {
+	      currentValue = input[i];
+	      if (currentValue < n && ++delta > maxInt) {
+	        throw RangeError$1(OVERFLOW_ERROR);
+	      }
+	      if (currentValue == n) {
+	        // Represent delta as a generalized variable-length integer.
+	        var q = delta;
+	        var k = base;
+	        while (true) {
+	          var t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
+	          if (q < t) break;
+	          var qMinusT = q - t;
+	          var baseMinusT = base - t;
+	          push$1(output, fromCharCode(digitToBasic(t + qMinusT % baseMinusT)));
+	          q = floor$1(qMinusT / baseMinusT);
+	          k += base;
+	        }
+
+	        push$1(output, fromCharCode(digitToBasic(q)));
+	        bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
+	        delta = 0;
+	        handledCPCount++;
+	      }
+	    }
 
-	    fillEnter
-	      .append('svg')
-	      .attr('class', 'preset-icon-fill preset-icon-fill-vertex')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h))
-	      .append('circle')
-	      .attr('cx', w / 2)
-	      .attr('cy', h / 2)
-	      .attr('r', d / 2);
-	  }
+	    delta++;
+	    n++;
+	  }
+	  return join$1(output, '');
+	};
+
+	var stringPunycodeToAscii = function (input) {
+	  var encoded = [];
+	  var labels = split$1(replace$1(toLowerCase$1(input), regexSeparators, '\u002E'), '.');
+	  var i, label;
+	  for (i = 0; i < labels.length; i++) {
+	    label = labels[i];
+	    push$1(encoded, exec$1(regexNonASCII, label) ? 'xn--' + encode(label) : label);
+	  }
+	  return join$1(encoded, '.');
+	};
+
+	// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
+
+	var $ = _export;
+	var DESCRIPTORS = descriptors;
+	var USE_NATIVE_URL = nativeUrl;
+	var global$1 = global$1o;
+	var bind$2 = functionBindContext;
+	var uncurryThis = functionUncurryThis;
+	var defineProperties = objectDefineProperties.f;
+	var redefine = redefine$h.exports;
+	var anInstance = anInstance$7;
+	var hasOwn = hasOwnProperty_1;
+	var assign$1 = objectAssign;
+	var arrayFrom = arrayFrom$1;
+	var arraySlice = arraySliceSimple;
+	var codeAt = stringMultibyte.codeAt;
+	var toASCII = stringPunycodeToAscii;
+	var $toString = toString$k;
+	var setToStringTag = setToStringTag$a;
+	var validateArgumentsLength = validateArgumentsLength$4;
+	var URLSearchParamsModule = web_urlSearchParams;
+	var InternalStateModule = internalState;
+
+	var setInternalState = InternalStateModule.set;
+	var getInternalURLState = InternalStateModule.getterFor('URL');
+	var URLSearchParams$1 = URLSearchParamsModule.URLSearchParams;
+	var getInternalSearchParamsState = URLSearchParamsModule.getState;
+
+	var NativeURL = global$1.URL;
+	var TypeError$1 = global$1.TypeError;
+	var parseInt$1 = global$1.parseInt;
+	var floor = Math.floor;
+	var pow = Math.pow;
+	var charAt = uncurryThis(''.charAt);
+	var exec = uncurryThis(/./.exec);
+	var join = uncurryThis([].join);
+	var numberToString = uncurryThis(1.0.toString);
+	var pop = uncurryThis([].pop);
+	var push = uncurryThis([].push);
+	var replace = uncurryThis(''.replace);
+	var shift = uncurryThis([].shift);
+	var split = uncurryThis(''.split);
+	var stringSlice = uncurryThis(''.slice);
+	var toLowerCase = uncurryThis(''.toLowerCase);
+	var unshift = uncurryThis([].unshift);
+
+	var INVALID_AUTHORITY = 'Invalid authority';
+	var INVALID_SCHEME = 'Invalid scheme';
+	var INVALID_HOST = 'Invalid host';
+	var INVALID_PORT = 'Invalid port';
+
+	var ALPHA = /[a-z]/i;
+	// eslint-disable-next-line regexp/no-obscure-range -- safe
+	var ALPHANUMERIC = /[\d+-.a-z]/i;
+	var DIGIT = /\d/;
+	var HEX_START = /^0x/i;
+	var OCT = /^[0-7]+$/;
+	var DEC = /^\d+$/;
+	var HEX = /^[\da-f]+$/i;
+	/* eslint-disable regexp/no-control-character -- safe */
+	var FORBIDDEN_HOST_CODE_POINT = /[\0\t\n\r #%/:<>?@[\\\]^|]/;
+	var FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT = /[\0\t\n\r #/:<>?@[\\\]^|]/;
+	var LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE = /^[\u0000-\u0020]+|[\u0000-\u0020]+$/g;
+	var TAB_AND_NEW_LINE = /[\t\n\r]/g;
+	/* eslint-enable regexp/no-control-character -- safe */
+	var EOF;
+
+	// https://url.spec.whatwg.org/#ipv4-number-parser
+	var parseIPv4 = function (input) {
+	  var parts = split(input, '.');
+	  var partsLength, numbers, index, part, radix, number, ipv4;
+	  if (parts.length && parts[parts.length - 1] == '') {
+	    parts.length--;
+	  }
+	  partsLength = parts.length;
+	  if (partsLength > 4) return input;
+	  numbers = [];
+	  for (index = 0; index < partsLength; index++) {
+	    part = parts[index];
+	    if (part == '') return input;
+	    radix = 10;
+	    if (part.length > 1 && charAt(part, 0) == '0') {
+	      radix = exec(HEX_START, part) ? 16 : 8;
+	      part = stringSlice(part, radix == 8 ? 1 : 2);
+	    }
+	    if (part === '') {
+	      number = 0;
+	    } else {
+	      if (!exec(radix == 10 ? DEC : radix == 8 ? OCT : HEX, part)) return input;
+	      number = parseInt$1(part, radix);
+	    }
+	    push(numbers, number);
+	  }
+	  for (index = 0; index < partsLength; index++) {
+	    number = numbers[index];
+	    if (index == partsLength - 1) {
+	      if (number >= pow(256, 5 - partsLength)) return null;
+	    } else if (number > 255) return null;
+	  }
+	  ipv4 = pop(numbers);
+	  for (index = 0; index < numbers.length; index++) {
+	    ipv4 += numbers[index] * pow(256, 3 - index);
+	  }
+	  return ipv4;
+	};
+
+	// https://url.spec.whatwg.org/#concept-ipv6-parser
+	// eslint-disable-next-line max-statements -- TODO
+	var parseIPv6 = function (input) {
+	  var address = [0, 0, 0, 0, 0, 0, 0, 0];
+	  var pieceIndex = 0;
+	  var compress = null;
+	  var pointer = 0;
+	  var value, length, numbersSeen, ipv4Piece, number, swaps, swap;
+
+	  var chr = function () {
+	    return charAt(input, pointer);
+	  };
+
+	  if (chr() == ':') {
+	    if (charAt(input, 1) != ':') return;
+	    pointer += 2;
+	    pieceIndex++;
+	    compress = pieceIndex;
+	  }
+	  while (chr()) {
+	    if (pieceIndex == 8) return;
+	    if (chr() == ':') {
+	      if (compress !== null) return;
+	      pointer++;
+	      pieceIndex++;
+	      compress = pieceIndex;
+	      continue;
+	    }
+	    value = length = 0;
+	    while (length < 4 && exec(HEX, chr())) {
+	      value = value * 16 + parseInt$1(chr(), 16);
+	      pointer++;
+	      length++;
+	    }
+	    if (chr() == '.') {
+	      if (length == 0) return;
+	      pointer -= length;
+	      if (pieceIndex > 6) return;
+	      numbersSeen = 0;
+	      while (chr()) {
+	        ipv4Piece = null;
+	        if (numbersSeen > 0) {
+	          if (chr() == '.' && numbersSeen < 4) pointer++;
+	          else return;
+	        }
+	        if (!exec(DIGIT, chr())) return;
+	        while (exec(DIGIT, chr())) {
+	          number = parseInt$1(chr(), 10);
+	          if (ipv4Piece === null) ipv4Piece = number;
+	          else if (ipv4Piece == 0) return;
+	          else ipv4Piece = ipv4Piece * 10 + number;
+	          if (ipv4Piece > 255) return;
+	          pointer++;
+	        }
+	        address[pieceIndex] = address[pieceIndex] * 256 + ipv4Piece;
+	        numbersSeen++;
+	        if (numbersSeen == 2 || numbersSeen == 4) pieceIndex++;
+	      }
+	      if (numbersSeen != 4) return;
+	      break;
+	    } else if (chr() == ':') {
+	      pointer++;
+	      if (!chr()) return;
+	    } else if (chr()) return;
+	    address[pieceIndex++] = value;
+	  }
+	  if (compress !== null) {
+	    swaps = pieceIndex - compress;
+	    pieceIndex = 7;
+	    while (pieceIndex != 0 && swaps > 0) {
+	      swap = address[pieceIndex];
+	      address[pieceIndex--] = address[compress + swaps - 1];
+	      address[compress + --swaps] = swap;
+	    }
+	  } else if (pieceIndex != 8) return;
+	  return address;
+	};
+
+	var findLongestZeroSequence = function (ipv6) {
+	  var maxIndex = null;
+	  var maxLength = 1;
+	  var currStart = null;
+	  var currLength = 0;
+	  var index = 0;
+	  for (; index < 8; index++) {
+	    if (ipv6[index] !== 0) {
+	      if (currLength > maxLength) {
+	        maxIndex = currStart;
+	        maxLength = currLength;
+	      }
+	      currStart = null;
+	      currLength = 0;
+	    } else {
+	      if (currStart === null) currStart = index;
+	      ++currLength;
+	    }
+	  }
+	  if (currLength > maxLength) {
+	    maxIndex = currStart;
+	    maxLength = currLength;
+	  }
+	  return maxIndex;
+	};
+
+	// https://url.spec.whatwg.org/#host-serializing
+	var serializeHost = function (host) {
+	  var result, index, compress, ignore0;
+	  // ipv4
+	  if (typeof host == 'number') {
+	    result = [];
+	    for (index = 0; index < 4; index++) {
+	      unshift(result, host % 256);
+	      host = floor(host / 256);
+	    } return join(result, '.');
+	  // ipv6
+	  } else if (typeof host == 'object') {
+	    result = '';
+	    compress = findLongestZeroSequence(host);
+	    for (index = 0; index < 8; index++) {
+	      if (ignore0 && host[index] === 0) continue;
+	      if (ignore0) ignore0 = false;
+	      if (compress === index) {
+	        result += index ? ':' : '::';
+	        ignore0 = true;
+	      } else {
+	        result += numberToString(host[index], 16);
+	        if (index < 7) result += ':';
+	      }
+	    }
+	    return '[' + result + ']';
+	  } return host;
+	};
 
+	var C0ControlPercentEncodeSet = {};
+	var fragmentPercentEncodeSet = assign$1({}, C0ControlPercentEncodeSet, {
+	  ' ': 1, '"': 1, '<': 1, '>': 1, '`': 1
+	});
+	var pathPercentEncodeSet = assign$1({}, fragmentPercentEncodeSet, {
+	  '#': 1, '?': 1, '{': 1, '}': 1
+	});
+	var userinfoPercentEncodeSet = assign$1({}, pathPercentEncodeSet, {
+	  '/': 1, ':': 1, ';': 1, '=': 1, '@': 1, '[': 1, '\\': 1, ']': 1, '^': 1, '|': 1
+	});
 
-	  function renderSquareFill(fillEnter) {
-	    var d = isSmall() ? 40 : 60;
-	    var w = d;
-	    var h = d;
-	    var l = d * 2/3;
-	    var c1 = (w-l) / 2;
-	    var c2 = c1 + l;
+	var percentEncode = function (chr, set) {
+	  var code = codeAt(chr, 0);
+	  return code > 0x20 && code < 0x7F && !hasOwn(set, chr) ? chr : encodeURIComponent(chr);
+	};
 
-	    fillEnter = fillEnter
-	      .append('svg')
-	      .attr('class', 'preset-icon-fill preset-icon-fill-area')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h));
+	// https://url.spec.whatwg.org/#special-scheme
+	var specialSchemes = {
+	  ftp: 21,
+	  file: null,
+	  http: 80,
+	  https: 443,
+	  ws: 80,
+	  wss: 443
+	};
 
-	    ['fill', 'stroke'].forEach(function (klass) {
-	      fillEnter
-	        .append('path')
-	        .attr('d', ("M" + c1 + " " + c1 + " L" + c1 + " " + c2 + " L" + c2 + " " + c2 + " L" + c2 + " " + c1 + " Z"))
-	        .attr('class', ("line area " + klass));
-	    });
+	// https://url.spec.whatwg.org/#windows-drive-letter
+	var isWindowsDriveLetter = function (string, normalized) {
+	  var second;
+	  return string.length == 2 && exec(ALPHA, charAt(string, 0))
+	    && ((second = charAt(string, 1)) == ':' || (!normalized && second == '|'));
+	};
 
-	    var rVertex = 2.5;
-	    [[c1, c1], [c1, c2], [c2, c2], [c2, c1]].forEach(function (point) {
-	      fillEnter
-	        .append('circle')
-	        .attr('class', 'vertex')
-	        .attr('cx', point[0])
-	        .attr('cy', point[1])
-	        .attr('r', rVertex);
-	    });
+	// https://url.spec.whatwg.org/#start-with-a-windows-drive-letter
+	var startsWithWindowsDriveLetter = function (string) {
+	  var third;
+	  return string.length > 1 && isWindowsDriveLetter(stringSlice(string, 0, 2)) && (
+	    string.length == 2 ||
+	    ((third = charAt(string, 2)) === '/' || third === '\\' || third === '?' || third === '#')
+	  );
+	};
 
-	    if (!isSmall()) {
-	      var rMidpoint = 1.25;
-	      [[c1, w/2], [c2, w/2], [h/2, c1], [h/2, c2]].forEach(function (point) {
-	        fillEnter
-	          .append('circle')
-	          .attr('class', 'midpoint')
-	          .attr('cx', point[0])
-	          .attr('cy', point[1])
-	          .attr('r', rMidpoint);
-	      });
-	    }
-	  }
+	// https://url.spec.whatwg.org/#single-dot-path-segment
+	var isSingleDot = function (segment) {
+	  return segment === '.' || toLowerCase(segment) === '%2e';
+	};
+
+	// https://url.spec.whatwg.org/#double-dot-path-segment
+	var isDoubleDot = function (segment) {
+	  segment = toLowerCase(segment);
+	  return segment === '..' || segment === '%2e.' || segment === '.%2e' || segment === '%2e%2e';
+	};
+
+	// States:
+	var SCHEME_START = {};
+	var SCHEME = {};
+	var NO_SCHEME = {};
+	var SPECIAL_RELATIVE_OR_AUTHORITY = {};
+	var PATH_OR_AUTHORITY = {};
+	var RELATIVE = {};
+	var RELATIVE_SLASH = {};
+	var SPECIAL_AUTHORITY_SLASHES = {};
+	var SPECIAL_AUTHORITY_IGNORE_SLASHES = {};
+	var AUTHORITY = {};
+	var HOST = {};
+	var HOSTNAME = {};
+	var PORT = {};
+	var FILE = {};
+	var FILE_SLASH = {};
+	var FILE_HOST = {};
+	var PATH_START = {};
+	var PATH = {};
+	var CANNOT_BE_A_BASE_URL_PATH = {};
+	var QUERY = {};
+	var FRAGMENT = {};
+
+	var URLState = function (url, isBase, base) {
+	  var urlString = $toString(url);
+	  var baseState, failure, searchParams;
+	  if (isBase) {
+	    failure = this.parse(urlString);
+	    if (failure) throw TypeError$1(failure);
+	    this.searchParams = null;
+	  } else {
+	    if (base !== undefined) baseState = new URLState(base, true);
+	    failure = this.parse(urlString, null, baseState);
+	    if (failure) throw TypeError$1(failure);
+	    searchParams = getInternalSearchParamsState(new URLSearchParams$1());
+	    searchParams.bindURL(this);
+	    this.searchParams = searchParams;
+	  }
+	};
+
+	URLState.prototype = {
+	  type: 'URL',
+	  // https://url.spec.whatwg.org/#url-parsing
+	  // eslint-disable-next-line max-statements -- TODO
+	  parse: function (input, stateOverride, base) {
+	    var url = this;
+	    var state = stateOverride || SCHEME_START;
+	    var pointer = 0;
+	    var buffer = '';
+	    var seenAt = false;
+	    var seenBracket = false;
+	    var seenPasswordToken = false;
+	    var codePoints, chr, bufferCodePoints, failure;
+
+	    input = $toString(input);
+
+	    if (!stateOverride) {
+	      url.scheme = '';
+	      url.username = '';
+	      url.password = '';
+	      url.host = null;
+	      url.port = null;
+	      url.path = [];
+	      url.query = null;
+	      url.fragment = null;
+	      url.cannotBeABaseURL = false;
+	      input = replace(input, LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE, '');
+	    }
+
+	    input = replace(input, TAB_AND_NEW_LINE, '');
+
+	    codePoints = arrayFrom(input);
+
+	    while (pointer <= codePoints.length) {
+	      chr = codePoints[pointer];
+	      switch (state) {
+	        case SCHEME_START:
+	          if (chr && exec(ALPHA, chr)) {
+	            buffer += toLowerCase(chr);
+	            state = SCHEME;
+	          } else if (!stateOverride) {
+	            state = NO_SCHEME;
+	            continue;
+	          } else return INVALID_SCHEME;
+	          break;
 
+	        case SCHEME:
+	          if (chr && (exec(ALPHANUMERIC, chr) || chr == '+' || chr == '-' || chr == '.')) {
+	            buffer += toLowerCase(chr);
+	          } else if (chr == ':') {
+	            if (stateOverride && (
+	              (url.isSpecial() != hasOwn(specialSchemes, buffer)) ||
+	              (buffer == 'file' && (url.includesCredentials() || url.port !== null)) ||
+	              (url.scheme == 'file' && !url.host)
+	            )) return;
+	            url.scheme = buffer;
+	            if (stateOverride) {
+	              if (url.isSpecial() && specialSchemes[url.scheme] == url.port) url.port = null;
+	              return;
+	            }
+	            buffer = '';
+	            if (url.scheme == 'file') {
+	              state = FILE;
+	            } else if (url.isSpecial() && base && base.scheme == url.scheme) {
+	              state = SPECIAL_RELATIVE_OR_AUTHORITY;
+	            } else if (url.isSpecial()) {
+	              state = SPECIAL_AUTHORITY_SLASHES;
+	            } else if (codePoints[pointer + 1] == '/') {
+	              state = PATH_OR_AUTHORITY;
+	              pointer++;
+	            } else {
+	              url.cannotBeABaseURL = true;
+	              push(url.path, '');
+	              state = CANNOT_BE_A_BASE_URL_PATH;
+	            }
+	          } else if (!stateOverride) {
+	            buffer = '';
+	            state = NO_SCHEME;
+	            pointer = 0;
+	            continue;
+	          } else return INVALID_SCHEME;
+	          break;
 
-	  function renderLine(lineEnter) {
-	    var d = isSmall() ? 40 : 60;
-	    // draw the line parametrically
-	    var w = d;
-	    var h = d;
-	    var y = Math.round(d * 0.72);
-	    var l = Math.round(d * 0.6);
-	    var r = 2.5;
-	    var x1 = (w - l) / 2;
-	    var x2 = x1 + l;
+	        case NO_SCHEME:
+	          if (!base || (base.cannotBeABaseURL && chr != '#')) return INVALID_SCHEME;
+	          if (base.cannotBeABaseURL && chr == '#') {
+	            url.scheme = base.scheme;
+	            url.path = arraySlice(base.path);
+	            url.query = base.query;
+	            url.fragment = '';
+	            url.cannotBeABaseURL = true;
+	            state = FRAGMENT;
+	            break;
+	          }
+	          state = base.scheme == 'file' ? FILE : RELATIVE;
+	          continue;
 
-	    lineEnter = lineEnter
-	      .append('svg')
-	      .attr('class', 'preset-icon-line')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h));
+	        case SPECIAL_RELATIVE_OR_AUTHORITY:
+	          if (chr == '/' && codePoints[pointer + 1] == '/') {
+	            state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+	            pointer++;
+	          } else {
+	            state = RELATIVE;
+	            continue;
+	          } break;
 
-	    ['casing', 'stroke'].forEach(function (klass) {
-	      lineEnter
-	        .append('path')
-	        .attr('d', ("M" + x1 + " " + y + " L" + x2 + " " + y))
-	        .attr('class', ("line " + klass));
-	    });
+	        case PATH_OR_AUTHORITY:
+	          if (chr == '/') {
+	            state = AUTHORITY;
+	            break;
+	          } else {
+	            state = PATH;
+	            continue;
+	          }
 
-	    [[x1-1, y], [x2+1, y]].forEach(function (point) {
-	      lineEnter
-	        .append('circle')
-	        .attr('class', 'vertex')
-	        .attr('cx', point[0])
-	        .attr('cy', point[1])
-	        .attr('r', r);
-	    });
-	  }
+	        case RELATIVE:
+	          url.scheme = base.scheme;
+	          if (chr == EOF) {
+	            url.username = base.username;
+	            url.password = base.password;
+	            url.host = base.host;
+	            url.port = base.port;
+	            url.path = arraySlice(base.path);
+	            url.query = base.query;
+	          } else if (chr == '/' || (chr == '\\' && url.isSpecial())) {
+	            state = RELATIVE_SLASH;
+	          } else if (chr == '?') {
+	            url.username = base.username;
+	            url.password = base.password;
+	            url.host = base.host;
+	            url.port = base.port;
+	            url.path = arraySlice(base.path);
+	            url.query = '';
+	            state = QUERY;
+	          } else if (chr == '#') {
+	            url.username = base.username;
+	            url.password = base.password;
+	            url.host = base.host;
+	            url.port = base.port;
+	            url.path = arraySlice(base.path);
+	            url.query = base.query;
+	            url.fragment = '';
+	            state = FRAGMENT;
+	          } else {
+	            url.username = base.username;
+	            url.password = base.password;
+	            url.host = base.host;
+	            url.port = base.port;
+	            url.path = arraySlice(base.path);
+	            url.path.length--;
+	            state = PATH;
+	            continue;
+	          } break;
 
+	        case RELATIVE_SLASH:
+	          if (url.isSpecial() && (chr == '/' || chr == '\\')) {
+	            state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+	          } else if (chr == '/') {
+	            state = AUTHORITY;
+	          } else {
+	            url.username = base.username;
+	            url.password = base.password;
+	            url.host = base.host;
+	            url.port = base.port;
+	            state = PATH;
+	            continue;
+	          } break;
 
-	  function renderRoute(routeEnter) {
-	    var d = isSmall() ? 40 : 60;
-	    // draw the route parametrically
-	    var w = d;
-	    var h = d;
-	    var y1 = Math.round(d * 0.80);
-	    var y2 = Math.round(d * 0.68);
-	    var l = Math.round(d * 0.6);
-	    var r = 2;
-	    var x1 = (w - l) / 2;
-	    var x2 = x1 + l / 3;
-	    var x3 = x2 + l / 3;
-	    var x4 = x3 + l / 3;
+	        case SPECIAL_AUTHORITY_SLASHES:
+	          state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+	          if (chr != '/' || charAt(buffer, pointer + 1) != '/') continue;
+	          pointer++;
+	          break;
 
-	    routeEnter = routeEnter
-	      .append('svg')
-	      .attr('class', 'preset-icon-route')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h));
+	        case SPECIAL_AUTHORITY_IGNORE_SLASHES:
+	          if (chr != '/' && chr != '\\') {
+	            state = AUTHORITY;
+	            continue;
+	          } break;
+
+	        case AUTHORITY:
+	          if (chr == '@') {
+	            if (seenAt) buffer = '%40' + buffer;
+	            seenAt = true;
+	            bufferCodePoints = arrayFrom(buffer);
+	            for (var i = 0; i < bufferCodePoints.length; i++) {
+	              var codePoint = bufferCodePoints[i];
+	              if (codePoint == ':' && !seenPasswordToken) {
+	                seenPasswordToken = true;
+	                continue;
+	              }
+	              var encodedCodePoints = percentEncode(codePoint, userinfoPercentEncodeSet);
+	              if (seenPasswordToken) url.password += encodedCodePoints;
+	              else url.username += encodedCodePoints;
+	            }
+	            buffer = '';
+	          } else if (
+	            chr == EOF || chr == '/' || chr == '?' || chr == '#' ||
+	            (chr == '\\' && url.isSpecial())
+	          ) {
+	            if (seenAt && buffer == '') return INVALID_AUTHORITY;
+	            pointer -= arrayFrom(buffer).length + 1;
+	            buffer = '';
+	            state = HOST;
+	          } else buffer += chr;
+	          break;
 
-	    ['casing', 'stroke'].forEach(function (klass) {
-	      routeEnter
-	        .append('path')
-	        .attr('d', ("M" + x1 + " " + y1 + " L" + x2 + " " + y2))
-	        .attr('class', ("segment0 line " + klass));
-	      routeEnter
-	        .append('path')
-	        .attr('d', ("M" + x2 + " " + y2 + " L" + x3 + " " + y1))
-	        .attr('class', ("segment1 line " + klass));
-	      routeEnter
-	        .append('path')
-	        .attr('d', ("M" + x3 + " " + y1 + " L" + x4 + " " + y2))
-	        .attr('class', ("segment2 line " + klass));
-	    });
+	        case HOST:
+	        case HOSTNAME:
+	          if (stateOverride && url.scheme == 'file') {
+	            state = FILE_HOST;
+	            continue;
+	          } else if (chr == ':' && !seenBracket) {
+	            if (buffer == '') return INVALID_HOST;
+	            failure = url.parseHost(buffer);
+	            if (failure) return failure;
+	            buffer = '';
+	            state = PORT;
+	            if (stateOverride == HOSTNAME) return;
+	          } else if (
+	            chr == EOF || chr == '/' || chr == '?' || chr == '#' ||
+	            (chr == '\\' && url.isSpecial())
+	          ) {
+	            if (url.isSpecial() && buffer == '') return INVALID_HOST;
+	            if (stateOverride && buffer == '' && (url.includesCredentials() || url.port !== null)) return;
+	            failure = url.parseHost(buffer);
+	            if (failure) return failure;
+	            buffer = '';
+	            state = PATH_START;
+	            if (stateOverride) return;
+	            continue;
+	          } else {
+	            if (chr == '[') seenBracket = true;
+	            else if (chr == ']') seenBracket = false;
+	            buffer += chr;
+	          } break;
+
+	        case PORT:
+	          if (exec(DIGIT, chr)) {
+	            buffer += chr;
+	          } else if (
+	            chr == EOF || chr == '/' || chr == '?' || chr == '#' ||
+	            (chr == '\\' && url.isSpecial()) ||
+	            stateOverride
+	          ) {
+	            if (buffer != '') {
+	              var port = parseInt$1(buffer, 10);
+	              if (port > 0xFFFF) return INVALID_PORT;
+	              url.port = (url.isSpecial() && port === specialSchemes[url.scheme]) ? null : port;
+	              buffer = '';
+	            }
+	            if (stateOverride) return;
+	            state = PATH_START;
+	            continue;
+	          } else return INVALID_PORT;
+	          break;
 
-	    [[x1, y1], [x2, y2], [x3, y1], [x4, y2]].forEach(function (point) {
-	      routeEnter
-	        .append('circle')
-	        .attr('class', 'vertex')
-	        .attr('cx', point[0])
-	        .attr('cy', point[1])
-	        .attr('r', r);
-	    });
-	  }
+	        case FILE:
+	          url.scheme = 'file';
+	          if (chr == '/' || chr == '\\') state = FILE_SLASH;
+	          else if (base && base.scheme == 'file') {
+	            if (chr == EOF) {
+	              url.host = base.host;
+	              url.path = arraySlice(base.path);
+	              url.query = base.query;
+	            } else if (chr == '?') {
+	              url.host = base.host;
+	              url.path = arraySlice(base.path);
+	              url.query = '';
+	              state = QUERY;
+	            } else if (chr == '#') {
+	              url.host = base.host;
+	              url.path = arraySlice(base.path);
+	              url.query = base.query;
+	              url.fragment = '';
+	              state = FRAGMENT;
+	            } else {
+	              if (!startsWithWindowsDriveLetter(join(arraySlice(codePoints, pointer), ''))) {
+	                url.host = base.host;
+	                url.path = arraySlice(base.path);
+	                url.shortenPath();
+	              }
+	              state = PATH;
+	              continue;
+	            }
+	          } else {
+	            state = PATH;
+	            continue;
+	          } break;
 
+	        case FILE_SLASH:
+	          if (chr == '/' || chr == '\\') {
+	            state = FILE_HOST;
+	            break;
+	          }
+	          if (base && base.scheme == 'file' && !startsWithWindowsDriveLetter(join(arraySlice(codePoints, pointer), ''))) {
+	            if (isWindowsDriveLetter(base.path[0], true)) push(url.path, base.path[0]);
+	            else url.host = base.host;
+	          }
+	          state = PATH;
+	          continue;
 
-	  // Route icons are drawn with a zigzag annotation underneath:
-	  //     o   o
-	  //    / \ /
-	  //   o   o
-	  // This dataset defines the styles that are used to draw the zigzag segments.
-	  var routeSegments = {
-	    bicycle: ['highway/cycleway', 'highway/cycleway', 'highway/cycleway'],
-	    bus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
-	    trolleybus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
-	    detour: ['highway/tertiary', 'highway/residential', 'highway/unclassified'],
-	    ferry: ['route/ferry', 'route/ferry', 'route/ferry'],
-	    foot: ['highway/footway', 'highway/footway', 'highway/footway'],
-	    hiking: ['highway/path', 'highway/path', 'highway/path'],
-	    horse: ['highway/bridleway', 'highway/bridleway', 'highway/bridleway'],
-	    light_rail: ['railway/light_rail', 'railway/light_rail', 'railway/light_rail'],
-	    monorail: ['railway/monorail', 'railway/monorail', 'railway/monorail'],
-	    pipeline: ['man_made/pipeline', 'man_made/pipeline', 'man_made/pipeline'],
-	    piste: ['piste/downhill', 'piste/hike', 'piste/nordic'],
-	    power: ['power/line', 'power/line', 'power/line'],
-	    road: ['highway/secondary', 'highway/primary', 'highway/trunk'],
-	    subway: ['railway/subway', 'railway/subway', 'railway/subway'],
-	    train: ['railway/rail', 'railway/rail', 'railway/rail'],
-	    tram: ['railway/tram', 'railway/tram', 'railway/tram'],
-	    waterway: ['waterway/stream', 'waterway/stream', 'waterway/stream']
-	  };
+	        case FILE_HOST:
+	          if (chr == EOF || chr == '/' || chr == '\\' || chr == '?' || chr == '#') {
+	            if (!stateOverride && isWindowsDriveLetter(buffer)) {
+	              state = PATH;
+	            } else if (buffer == '') {
+	              url.host = '';
+	              if (stateOverride) return;
+	              state = PATH_START;
+	            } else {
+	              failure = url.parseHost(buffer);
+	              if (failure) return failure;
+	              if (url.host == 'localhost') url.host = '';
+	              if (stateOverride) return;
+	              buffer = '';
+	              state = PATH_START;
+	            } continue;
+	          } else buffer += chr;
+	          break;
 
+	        case PATH_START:
+	          if (url.isSpecial()) {
+	            state = PATH;
+	            if (chr != '/' && chr != '\\') continue;
+	          } else if (!stateOverride && chr == '?') {
+	            url.query = '';
+	            state = QUERY;
+	          } else if (!stateOverride && chr == '#') {
+	            url.fragment = '';
+	            state = FRAGMENT;
+	          } else if (chr != EOF) {
+	            state = PATH;
+	            if (chr != '/') continue;
+	          } break;
+
+	        case PATH:
+	          if (
+	            chr == EOF || chr == '/' ||
+	            (chr == '\\' && url.isSpecial()) ||
+	            (!stateOverride && (chr == '?' || chr == '#'))
+	          ) {
+	            if (isDoubleDot(buffer)) {
+	              url.shortenPath();
+	              if (chr != '/' && !(chr == '\\' && url.isSpecial())) {
+	                push(url.path, '');
+	              }
+	            } else if (isSingleDot(buffer)) {
+	              if (chr != '/' && !(chr == '\\' && url.isSpecial())) {
+	                push(url.path, '');
+	              }
+	            } else {
+	              if (url.scheme == 'file' && !url.path.length && isWindowsDriveLetter(buffer)) {
+	                if (url.host) url.host = '';
+	                buffer = charAt(buffer, 0) + ':'; // normalize windows drive letter
+	              }
+	              push(url.path, buffer);
+	            }
+	            buffer = '';
+	            if (url.scheme == 'file' && (chr == EOF || chr == '?' || chr == '#')) {
+	              while (url.path.length > 1 && url.path[0] === '') {
+	                shift(url.path);
+	              }
+	            }
+	            if (chr == '?') {
+	              url.query = '';
+	              state = QUERY;
+	            } else if (chr == '#') {
+	              url.fragment = '';
+	              state = FRAGMENT;
+	            }
+	          } else {
+	            buffer += percentEncode(chr, pathPercentEncodeSet);
+	          } break;
+
+	        case CANNOT_BE_A_BASE_URL_PATH:
+	          if (chr == '?') {
+	            url.query = '';
+	            state = QUERY;
+	          } else if (chr == '#') {
+	            url.fragment = '';
+	            state = FRAGMENT;
+	          } else if (chr != EOF) {
+	            url.path[0] += percentEncode(chr, C0ControlPercentEncodeSet);
+	          } break;
+
+	        case QUERY:
+	          if (!stateOverride && chr == '#') {
+	            url.fragment = '';
+	            state = FRAGMENT;
+	          } else if (chr != EOF) {
+	            if (chr == "'" && url.isSpecial()) url.query += '%27';
+	            else if (chr == '#') url.query += '%23';
+	            else url.query += percentEncode(chr, C0ControlPercentEncodeSet);
+	          } break;
+
+	        case FRAGMENT:
+	          if (chr != EOF) url.fragment += percentEncode(chr, fragmentPercentEncodeSet);
+	          break;
+	      }
 
-	  function render() {
-	    var p = _preset.apply(this, arguments);
-	    var geom = _geometry ? _geometry.apply(this, arguments) : null;
-	    if (geom === 'relation' && p.tags && ((p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route]) || p.tags.type === 'waterway')) {
-	      geom = 'route';
+	      pointer++;
 	    }
-
-	    var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
-	    var isFallback = isSmall() && p.isFallback && p.isFallback();
-	    var imageURL = (showThirdPartyIcons === 'true') && p.imageURL;
-	    var picon = getIcon(p, geom);
-	    var isMaki = picon && /^maki-/.test(picon);
-	    var isTemaki = picon && /^temaki-/.test(picon);
-	    var isFa = picon && /^fa[srb]-/.test(picon);
-	    var isTnp = picon && /^tnp-/.test(picon);
-	    var isiDIcon = picon && !(isMaki || isTemaki || isFa || isTnp);
-	    var isCategory = !p.setTags;
-	    var drawPoint = picon && geom === 'point' && isSmall() && !isFallback;
-	    var drawVertex = picon !== null && geom === 'vertex' && (!isSmall() || !isFallback);
-	    var drawLine = picon && geom === 'line' && !isFallback && !isCategory;
-	    var drawArea = picon && geom === 'area' && !isFallback;
-	    var drawRoute = picon && geom === 'route';
-	    var isFramed = (drawVertex || drawArea || drawLine || drawRoute);
-
-	    var tags = !isCategory ? p.setTags({}, geom) : {};
-	    for (var k in tags) {
-	      if (tags[k] === '*') {
-	        tags[k] = 'yes';
+	  },
+	  // https://url.spec.whatwg.org/#host-parsing
+	  parseHost: function (input) {
+	    var result, codePoints, index;
+	    if (charAt(input, 0) == '[') {
+	      if (charAt(input, input.length - 1) != ']') return INVALID_HOST;
+	      result = parseIPv6(stringSlice(input, 1, -1));
+	      if (!result) return INVALID_HOST;
+	      this.host = result;
+	    // opaque host
+	    } else if (!this.isSpecial()) {
+	      if (exec(FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT, input)) return INVALID_HOST;
+	      result = '';
+	      codePoints = arrayFrom(input);
+	      for (index = 0; index < codePoints.length; index++) {
+	        result += percentEncode(codePoints[index], C0ControlPercentEncodeSet);
 	      }
+	      this.host = result;
+	    } else {
+	      input = toASCII(input);
+	      if (exec(FORBIDDEN_HOST_CODE_POINT, input)) return INVALID_HOST;
+	      result = parseIPv4(input);
+	      if (result === null) return INVALID_HOST;
+	      this.host = result;
+	    }
+	  },
+	  // https://url.spec.whatwg.org/#cannot-have-a-username-password-port
+	  cannotHaveUsernamePasswordPort: function () {
+	    return !this.host || this.cannotBeABaseURL || this.scheme == 'file';
+	  },
+	  // https://url.spec.whatwg.org/#include-credentials
+	  includesCredentials: function () {
+	    return this.username != '' || this.password != '';
+	  },
+	  // https://url.spec.whatwg.org/#is-special
+	  isSpecial: function () {
+	    return hasOwn(specialSchemes, this.scheme);
+	  },
+	  // https://url.spec.whatwg.org/#shorten-a-urls-path
+	  shortenPath: function () {
+	    var path = this.path;
+	    var pathSize = path.length;
+	    if (pathSize && (this.scheme != 'file' || pathSize != 1 || !isWindowsDriveLetter(path[0], true))) {
+	      path.length--;
+	    }
+	  },
+	  // https://url.spec.whatwg.org/#concept-url-serializer
+	  serialize: function () {
+	    var url = this;
+	    var scheme = url.scheme;
+	    var username = url.username;
+	    var password = url.password;
+	    var host = url.host;
+	    var port = url.port;
+	    var path = url.path;
+	    var query = url.query;
+	    var fragment = url.fragment;
+	    var output = scheme + ':';
+	    if (host !== null) {
+	      output += '//';
+	      if (url.includesCredentials()) {
+	        output += username + (password ? ':' + password : '') + '@';
+	      }
+	      output += serializeHost(host);
+	      if (port !== null) output += ':' + port;
+	    } else if (scheme == 'file') output += '//';
+	    output += url.cannotBeABaseURL ? path[0] : path.length ? '/' + join(path, '/') : '';
+	    if (query !== null) output += '?' + query;
+	    if (fragment !== null) output += '#' + fragment;
+	    return output;
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-href
+	  setHref: function (href) {
+	    var failure = this.parse(href);
+	    if (failure) throw TypeError$1(failure);
+	    this.searchParams.update();
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-origin
+	  getOrigin: function () {
+	    var scheme = this.scheme;
+	    var port = this.port;
+	    if (scheme == 'blob') try {
+	      return new URLConstructor(scheme.path[0]).origin;
+	    } catch (error) {
+	      return 'null';
+	    }
+	    if (scheme == 'file' || !this.isSpecial()) return 'null';
+	    return scheme + '://' + serializeHost(this.host) + (port !== null ? ':' + port : '');
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-protocol
+	  getProtocol: function () {
+	    return this.scheme + ':';
+	  },
+	  setProtocol: function (protocol) {
+	    this.parse($toString(protocol) + ':', SCHEME_START);
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-username
+	  getUsername: function () {
+	    return this.username;
+	  },
+	  setUsername: function (username) {
+	    var codePoints = arrayFrom($toString(username));
+	    if (this.cannotHaveUsernamePasswordPort()) return;
+	    this.username = '';
+	    for (var i = 0; i < codePoints.length; i++) {
+	      this.username += percentEncode(codePoints[i], userinfoPercentEncodeSet);
+	    }
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-password
+	  getPassword: function () {
+	    return this.password;
+	  },
+	  setPassword: function (password) {
+	    var codePoints = arrayFrom($toString(password));
+	    if (this.cannotHaveUsernamePasswordPort()) return;
+	    this.password = '';
+	    for (var i = 0; i < codePoints.length; i++) {
+	      this.password += percentEncode(codePoints[i], userinfoPercentEncodeSet);
+	    }
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-host
+	  getHost: function () {
+	    var host = this.host;
+	    var port = this.port;
+	    return host === null ? ''
+	      : port === null ? serializeHost(host)
+	      : serializeHost(host) + ':' + port;
+	  },
+	  setHost: function (host) {
+	    if (this.cannotBeABaseURL) return;
+	    this.parse(host, HOST);
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-hostname
+	  getHostname: function () {
+	    var host = this.host;
+	    return host === null ? '' : serializeHost(host);
+	  },
+	  setHostname: function (hostname) {
+	    if (this.cannotBeABaseURL) return;
+	    this.parse(hostname, HOSTNAME);
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-port
+	  getPort: function () {
+	    var port = this.port;
+	    return port === null ? '' : $toString(port);
+	  },
+	  setPort: function (port) {
+	    if (this.cannotHaveUsernamePasswordPort()) return;
+	    port = $toString(port);
+	    if (port == '') this.port = null;
+	    else this.parse(port, PORT);
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-pathname
+	  getPathname: function () {
+	    var path = this.path;
+	    return this.cannotBeABaseURL ? path[0] : path.length ? '/' + join(path, '/') : '';
+	  },
+	  setPathname: function (pathname) {
+	    if (this.cannotBeABaseURL) return;
+	    this.path = [];
+	    this.parse(pathname, PATH_START);
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-search
+	  getSearch: function () {
+	    var query = this.query;
+	    return query ? '?' + query : '';
+	  },
+	  setSearch: function (search) {
+	    search = $toString(search);
+	    if (search == '') {
+	      this.query = null;
+	    } else {
+	      if ('?' == charAt(search, 0)) search = stringSlice(search, 1);
+	      this.query = '';
+	      this.parse(search, QUERY);
+	    }
+	    this.searchParams.update();
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-searchparams
+	  getSearchParams: function () {
+	    return this.searchParams.facade;
+	  },
+	  // https://url.spec.whatwg.org/#dom-url-hash
+	  getHash: function () {
+	    var fragment = this.fragment;
+	    return fragment ? '#' + fragment : '';
+	  },
+	  setHash: function (hash) {
+	    hash = $toString(hash);
+	    if (hash == '') {
+	      this.fragment = null;
+	      return;
 	    }
+	    if ('#' == charAt(hash, 0)) hash = stringSlice(hash, 1);
+	    this.fragment = '';
+	    this.parse(hash, FRAGMENT);
+	  },
+	  update: function () {
+	    this.query = this.searchParams.serialize() || null;
+	  }
+	};
 
-	    var tagClasses = svgTagClasses().getClassesString(tags, '');
-	    var selection = select(this);
+	// `URL` constructor
+	// https://url.spec.whatwg.org/#url-class
+	var URLConstructor = function URL(url /* , base */) {
+	  var that = anInstance(this, URLPrototype);
+	  var base = validateArgumentsLength(arguments.length, 1) > 1 ? arguments[1] : undefined;
+	  var state = setInternalState(that, new URLState(url, false, base));
+	  if (!DESCRIPTORS) {
+	    that.href = state.serialize();
+	    that.origin = state.getOrigin();
+	    that.protocol = state.getProtocol();
+	    that.username = state.getUsername();
+	    that.password = state.getPassword();
+	    that.host = state.getHost();
+	    that.hostname = state.getHostname();
+	    that.port = state.getPort();
+	    that.pathname = state.getPathname();
+	    that.search = state.getSearch();
+	    that.searchParams = state.getSearchParams();
+	    that.hash = state.getHash();
+	  }
+	};
+
+	var URLPrototype = URLConstructor.prototype;
 
-	    var container = selection.selectAll('.preset-icon-container')
-	      .data([0]);
+	var accessorDescriptor = function (getter, setter) {
+	  return {
+	    get: function () {
+	      return getInternalURLState(this)[getter]();
+	    },
+	    set: setter && function (value) {
+	      return getInternalURLState(this)[setter](value);
+	    },
+	    configurable: true,
+	    enumerable: true
+	  };
+	};
+
+	if (DESCRIPTORS) {
+	  defineProperties(URLPrototype, {
+	    // `URL.prototype.href` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-href
+	    href: accessorDescriptor('serialize', 'setHref'),
+	    // `URL.prototype.origin` getter
+	    // https://url.spec.whatwg.org/#dom-url-origin
+	    origin: accessorDescriptor('getOrigin'),
+	    // `URL.prototype.protocol` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-protocol
+	    protocol: accessorDescriptor('getProtocol', 'setProtocol'),
+	    // `URL.prototype.username` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-username
+	    username: accessorDescriptor('getUsername', 'setUsername'),
+	    // `URL.prototype.password` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-password
+	    password: accessorDescriptor('getPassword', 'setPassword'),
+	    // `URL.prototype.host` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-host
+	    host: accessorDescriptor('getHost', 'setHost'),
+	    // `URL.prototype.hostname` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-hostname
+	    hostname: accessorDescriptor('getHostname', 'setHostname'),
+	    // `URL.prototype.port` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-port
+	    port: accessorDescriptor('getPort', 'setPort'),
+	    // `URL.prototype.pathname` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-pathname
+	    pathname: accessorDescriptor('getPathname', 'setPathname'),
+	    // `URL.prototype.search` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-search
+	    search: accessorDescriptor('getSearch', 'setSearch'),
+	    // `URL.prototype.searchParams` getter
+	    // https://url.spec.whatwg.org/#dom-url-searchparams
+	    searchParams: accessorDescriptor('getSearchParams'),
+	    // `URL.prototype.hash` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-hash
+	    hash: accessorDescriptor('getHash', 'setHash')
+	  });
+	}
 
-	    container = container.enter()
-	      .append('div')
-	      .attr('class', ("preset-icon-container " + _sizeClass))
-	      .merge(container);
+	// `URL.prototype.toJSON` method
+	// https://url.spec.whatwg.org/#dom-url-tojson
+	redefine(URLPrototype, 'toJSON', function toJSON() {
+	  return getInternalURLState(this).serialize();
+	}, { enumerable: true });
 
-	    container
-	      .classed('showing-img', !!imageURL)
-	      .classed('fallback', isFallback);
+	// `URL.prototype.toString` method
+	// https://url.spec.whatwg.org/#URL-stringification-behavior
+	redefine(URLPrototype, 'toString', function toString() {
+	  return getInternalURLState(this).serialize();
+	}, { enumerable: true });
 
+	if (NativeURL) {
+	  var nativeCreateObjectURL = NativeURL.createObjectURL;
+	  var nativeRevokeObjectURL = NativeURL.revokeObjectURL;
+	  // `URL.createObjectURL` method
+	  // https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL
+	  if (nativeCreateObjectURL) redefine(URLConstructor, 'createObjectURL', bind$2(nativeCreateObjectURL, NativeURL));
+	  // `URL.revokeObjectURL` method
+	  // https://developer.mozilla.org/en-US/docs/Web/API/URL/revokeObjectURL
+	  if (nativeRevokeObjectURL) redefine(URLConstructor, 'revokeObjectURL', bind$2(nativeRevokeObjectURL, NativeURL));
+	}
 
-	    var pointBorder = container.selectAll('.preset-icon-point-border')
-	      .data(drawPoint ? [0] : []);
+	setToStringTag(URLConstructor, 'URL');
 
-	    pointBorder.exit()
-	      .remove();
+	$({ global: true, forced: !USE_NATIVE_URL, sham: !DESCRIPTORS }, {
+	  URL: URLConstructor
+	});
 
-	    var pointBorderEnter = pointBorder.enter();
-	    renderPointBorder(pointBorderEnter);
-	    pointBorder = pointBorderEnter.merge(pointBorder);
+	function uiFieldText(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var input = select(null);
+	  var outlinkButton = select(null);
+	  var wrap = select(null);
+	  var _entityIDs = [];
 
+	  var _tags;
 
-	    var vertexFill = container.selectAll('.preset-icon-fill-vertex')
-	      .data(drawVertex ? [0] : []);
+	  var _phoneFormats = {};
 
-	    vertexFill.exit()
-	      .remove();
+	  if (field.type === 'tel') {
+	    _mainFileFetcher.get('phone_formats').then(function (d) {
+	      _phoneFormats = d;
+	      updatePhonePlaceholder();
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  }
 
-	    var vertexFillEnter = vertexFill.enter();
-	    renderCircleFill(vertexFillEnter);
-	    vertexFill = vertexFillEnter.merge(vertexFill);
+	  function calcLocked() {
+	    // Protect certain fields that have a companion `*:wikidata` value
+	    var isLocked = (field.id === 'brand' || field.id === 'network' || field.id === 'operator' || field.id === 'flag') && _entityIDs.length && _entityIDs.some(function (entityID) {
+	      var entity = context.graph().hasEntity(entityID);
+	      if (!entity) return false; // Features linked to Wikidata are likely important and should be protected
 
+	      if (entity.tags.wikidata) return true;
+	      var preset = _mainPresetIndex.match(entity, context.graph());
+	      var isSuggestion = preset && preset.suggestion; // Lock the field if there is a value and a companion `*:wikidata` value
 
-	    var fill = container.selectAll('.preset-icon-fill-area')
-	      .data(drawArea ? [0] : []);
+	      var which = field.id; // 'brand', 'network', 'operator', 'flag'
 
-	    fill.exit()
-	      .remove();
+	      return isSuggestion && !!entity.tags[which] && !!entity.tags[which + ':wikidata'];
+	    });
 
-	    var fillEnter = fill.enter();
-	    renderSquareFill(fillEnter);
-	    fill = fillEnter.merge(fill);
+	    field.locked(isLocked);
+	  }
 
-	    fill.selectAll('path.stroke')
-	      .attr('class', ("area stroke " + tagClasses));
-	    fill.selectAll('path.fill')
-	      .attr('class', ("area fill " + tagClasses));
+	  function i(selection) {
+	    calcLocked();
+	    var isLocked = field.locked();
+	    wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    input = wrap.selectAll('input').data([0]);
+	    input = input.enter().append('input').attr('type', field.type === 'identifier' ? 'text' : field.type).attr('id', field.domId).classed(field.type, true).call(utilNoAuto).merge(input);
+	    input.classed('disabled', !!isLocked).attr('readonly', isLocked || null).on('input', change(true)).on('blur', change()).on('change', change());
 
+	    if (field.type === 'tel') {
+	      updatePhonePlaceholder();
+	    } else if (field.type === 'number') {
+	      var rtl = _mainLocalizer.textDirection() === 'rtl';
+	      input.attr('type', 'text');
+	      var inc = field.increment;
+	      var buttons = wrap.selectAll('.increment, .decrement').data(rtl ? [inc, -inc] : [-inc, inc]);
+	      buttons.enter().append('button').attr('class', function (d) {
+	        var which = d > 0 ? 'increment' : 'decrement';
+	        return 'form-field-button ' + which;
+	      }).attr('title', function (d) {
+	        var which = d > 0 ? 'increment' : 'decrement';
+	        return _t("inspector.".concat(which));
+	      }).merge(buttons).on('click', function (d3_event, d) {
+	        d3_event.preventDefault();
+	        var raw_vals = input.node().value || '0';
+	        var vals = raw_vals.split(';');
+	        vals = vals.map(function (v) {
+	          var num = parseFloat(v.trim(), 10);
+	          return isFinite(num) ? clamped(num + d) : v.trim();
+	        });
+	        input.node().value = vals.join(';');
+	        change()();
+	      });
+	    } else if (field.type === 'identifier' && field.urlFormat && field.pattern) {
+	      input.attr('type', 'text');
+	      outlinkButton = wrap.selectAll('.foreign-id-permalink').data([0]);
+	      outlinkButton.enter().append('button').call(svgIcon('#iD-icon-out-link')).attr('class', 'form-field-button foreign-id-permalink').attr('title', function () {
+	        var domainResults = /^https?:\/\/(.{1,}?)\//.exec(field.urlFormat);
+
+	        if (domainResults.length >= 2 && domainResults[1]) {
+	          var domain = domainResults[1];
+	          return _t('icons.view_on', {
+	            domain: domain
+	          });
+	        }
 
-	    var line = container.selectAll('.preset-icon-line')
-	      .data(drawLine ? [0] : []);
+	        return '';
+	      }).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        var value = validIdentifierValueForLink();
+
+	        if (value) {
+	          var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
+	          window.open(url, '_blank');
+	        }
+	      }).merge(outlinkButton);
+	    } else if (field.type === 'url') {
+	      input.attr('type', 'text');
+	      outlinkButton = wrap.selectAll('.foreign-id-permalink').data([0]);
+	      outlinkButton.enter().append('button').call(svgIcon('#iD-icon-out-link')).attr('class', 'form-field-button foreign-id-permalink').attr('title', function () {
+	        return _t('icons.visit_website');
+	      }).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        var value = validIdentifierValueForLink();
+	        if (value) window.open(value, '_blank');
+	      }).merge(outlinkButton);
+	    } else if (field.key.split(':').includes('colour')) {
+	      input.attr('type', 'text');
+	      updateColourPreview();
+	    }
+	  }
+
+	  function isColourValid(colour) {
+	    if (!colour.match(/^(#([0-9a-fA-F]{3}){1,2}|\w+)$/)) {
+	      // OSM only supports hex or named colors
+	      return false;
+	    } else if (!CSS.supports('color', colour) || ['unset', 'inherit', 'initial', 'revert'].includes(colour)) {
+	      // see https://stackoverflow.com/a/68217760/1627467
+	      return false;
+	    }
 
-	    line.exit()
-	      .remove();
+	    return true;
+	  }
 
-	    var lineEnter = line.enter();
-	    renderLine(lineEnter);
-	    line = lineEnter.merge(line);
+	  function updateColourPreview() {
+	    wrap.selectAll('.colour-preview').remove();
+	    var colour = utilGetSetValue(input);
+	    if (!isColourValid(colour) && colour !== '') return;
+	    var colourSelector = wrap.selectAll('.colour-selector').data([0]);
+	    outlinkButton = wrap.selectAll('.colour-preview').data([colour]);
+	    colourSelector.enter().append('input').attr('type', 'color').attr('class', 'form-field-button colour-selector').attr('value', colour).on('input', debounce(function (d3_event) {
+	      d3_event.preventDefault();
+	      var colour = this.value;
+	      if (!isColourValid(colour)) return;
+	      utilGetSetValue(input, this.value);
+	      change()();
+	      updateColourPreview();
+	    }, 100));
+	    outlinkButton = outlinkButton.enter().append('div').attr('class', 'form-field-button colour-preview').append('div').style('background-color', function (d) {
+	      return d;
+	    }).attr('class', 'colour-box');
 
-	    line.selectAll('path.stroke')
-	      .attr('class', ("line stroke " + tagClasses));
-	    line.selectAll('path.casing')
-	      .attr('class', ("line casing " + tagClasses));
+	    if (colour === '') {
+	      outlinkButton = outlinkButton.call(svgIcon('#iD-icon-edit'));
+	    }
 
+	    outlinkButton.on('click', function () {
+	      return wrap.select('.colour-selector').node().click();
+	    }).merge(outlinkButton);
+	  }
 
-	    var route = container.selectAll('.preset-icon-route')
-	      .data(drawRoute ? [0] : []);
+	  function updatePhonePlaceholder() {
+	    if (input.empty() || !Object.keys(_phoneFormats).length) return;
+	    var extent = combinedEntityExtent();
+	    var countryCode = extent && iso1A2Code(extent.center());
 
-	    route.exit()
-	      .remove();
+	    var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
 
-	    var routeEnter = route.enter();
-	    renderRoute(routeEnter);
-	    route = routeEnter.merge(route);
+	    if (format) input.attr('placeholder', format);
+	  }
 
-	    if (drawRoute) {
-	      var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
-	      var segmentPresetIDs = routeSegments[routeType];
-	      for (var i in segmentPresetIDs) {
-	        var segmentPreset = _mainPresetIndex.item(segmentPresetIDs[i]);
-	        var segmentTagClasses = svgTagClasses().getClassesString(segmentPreset.tags, '');
-	        route.selectAll(("path.stroke.segment" + i))
-	          .attr('class', ("segment" + i + " line stroke " + segmentTagClasses));
-	        route.selectAll(("path.casing.segment" + i))
-	          .attr('class', ("segment" + i + " line casing " + segmentTagClasses));
+	  function validIdentifierValueForLink() {
+	    var value = utilGetSetValue(input).trim();
+
+	    if (field.type === 'url' && value) {
+	      try {
+	        return new URL(value).href;
+	      } catch (e) {
+	        return null;
 	      }
 	    }
 
+	    if (field.type === 'identifier' && field.pattern) {
+	      return value && value.match(new RegExp(field.pattern))[0];
+	    }
 
-	    var icon = container.selectAll('.preset-icon')
-	      .data(picon ? [0] : []);
+	    return null;
+	  } // clamp number to min/max
 
-	    icon.exit()
-	      .remove();
 
-	    icon = icon.enter()
-	      .append('div')
-	      .attr('class', 'preset-icon')
-	      .call(svgIcon(''))
-	      .merge(icon);
+	  function clamped(num) {
+	    if (field.minValue !== undefined) {
+	      num = Math.max(num, field.minValue);
+	    }
 
-	    icon
-	      .attr('class', 'preset-icon ' + (geom ? geom + '-geom' : ''))
-	      .classed('framed', isFramed)
-	      .classed('preset-icon-iD', isiDIcon);
+	    if (field.maxValue !== undefined) {
+	      num = Math.min(num, field.maxValue);
+	    }
 
-	    icon.selectAll('svg')
-	      .attr('class', 'icon ' + picon + ' ' + (!isiDIcon && geom !== 'line'  ? '' : tagClasses));
+	    return num;
+	  }
 
-	    icon.selectAll('use')
-	      .attr('href', '#' + picon + (isMaki ? (isSmall() && geom === 'point' ? '-11' : '-15') : ''));
+	  function change(onInput) {
+	    return function () {
+	      var t = {};
+	      var val = utilGetSetValue(input);
+	      if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
 
-	    var imageIcon = container.selectAll('img.image-icon')
-	      .data(imageURL ? [0] : []);
+	      if (!val && Array.isArray(_tags[field.key])) return;
 
-	    imageIcon.exit()
-	      .remove();
+	      if (!onInput) {
+	        if (field.type === 'number' && val) {
+	          var vals = val.split(';');
+	          vals = vals.map(function (v) {
+	            var num = parseFloat(v.trim(), 10);
+	            return isFinite(num) ? clamped(num) : v.trim();
+	          });
+	          val = vals.join(';');
+	        }
 
-	    imageIcon = imageIcon.enter()
-	      .append('img')
-	      .attr('class', 'image-icon')
-	      .on('load', function () { return container.classed('showing-img', true); } )
-	      .on('error', function () { return container.classed('showing-img', false); } )
-	      .merge(imageIcon);
+	        utilGetSetValue(input, val);
+	      }
 
-	    imageIcon
-	      .attr('src', imageURL);
+	      t[field.key] = val || undefined;
+	      dispatch.call('change', this, t, onInput);
+	    };
 	  }
 
-
-	  presetIcon.preset = function(val) {
-	    if (!arguments.length) { return _preset; }
-	    _preset = utilFunctor(val);
-	    return presetIcon;
+	  i.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return i;
 	  };
 
+	  i.tags = function (tags) {
+	    _tags = tags;
+	    var isMixed = Array.isArray(tags[field.key]);
+	    utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder() || _t('inspector.unknown')).classed('mixed', isMixed);
+	    if (field.key.split(':').includes('colour')) updateColourPreview();
 
-	  presetIcon.geometry = function(val) {
-	    if (!arguments.length) { return _geometry; }
-	    _geometry = utilFunctor(val);
-	    return presetIcon;
+	    if (outlinkButton && !outlinkButton.empty()) {
+	      var disabled = !validIdentifierValueForLink();
+	      outlinkButton.classed('disabled', disabled);
+	    }
 	  };
 
-
-	  presetIcon.sizeClass = function(val) {
-	    if (!arguments.length) { return _sizeClass; }
-	    _sizeClass = val;
-	    return presetIcon;
+	  i.focus = function () {
+	    var node = input.node();
+	    if (node) node.focus();
 	  };
 
-	  return presetIcon;
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
+
+	  return utilRebind(i, dispatch, 'on');
 	}
 
-	function uiSectionFeatureType(context) {
+	function uiFieldAccess(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var items = select(null);
 
-	    var dispatch$1 = dispatch('choose');
+	  var _tags;
 
-	    var _entityIDs = [];
-	    var _presets = [];
+	  function access(selection) {
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    var list = wrap.selectAll('ul').data([0]);
+	    list = list.enter().append('ul').attr('class', 'rows').merge(list);
+	    items = list.selectAll('li').data(field.keys); // Enter
 
-	    var _tagReference;
+	    var enter = items.enter().append('li').attr('class', function (d) {
+	      return 'labeled-input preset-access-' + d;
+	    });
+	    enter.append('span').attr('class', 'label preset-label-access').attr('for', function (d) {
+	      return 'preset-input-access-' + d;
+	    }).html(function (d) {
+	      return field.t.html('types.' + d);
+	    });
+	    enter.append('div').attr('class', 'preset-input-access-wrap').append('input').attr('type', 'text').attr('class', function (d) {
+	      return 'preset-input-access preset-input-access-' + d;
+	    }).call(utilNoAuto).each(function (d) {
+	      select(this).call(uiCombobox(context, 'access-' + d).data(access.options(d)));
+	    }); // Update
 
-	    var section = uiSection('feature-type', context)
-	        .title(_t('inspector.feature_type'))
-	        .disclosureContent(renderDisclosureContent);
+	    items = items.merge(enter);
+	    wrap.selectAll('.preset-input-access').on('change', change).on('blur', change);
+	  }
 
-	    function renderDisclosureContent(selection) {
+	  function change(d3_event, d) {
+	    var tag = {};
+	    var value = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
 
-	        selection.classed('preset-list-item', true);
-	        selection.classed('mixed-types', _presets.length > 1);
+	    if (!value && typeof _tags[d] !== 'string') return;
+	    tag[d] = value || undefined;
+	    dispatch.call('change', this, tag);
+	  }
 
-	        var presetButtonWrap = selection
-	            .selectAll('.preset-list-button-wrap')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'preset-list-button-wrap');
+	  access.options = function (type) {
+	    var options = ['no', 'permissive', 'private', 'permit', 'destination', 'customers', 'unknown'];
 
-	        var presetButton = presetButtonWrap
-	            .append('button')
-	            .attr('class', 'preset-list-button preset-reset')
-	            .call(uiTooltip()
-	                .title(_t('inspector.back_tooltip'))
-	                .placement('bottom')
-	            );
+	    if (type !== 'access') {
+	      options.unshift('yes');
+	      options.push('designated');
 
-	        presetButton.append('div')
-	            .attr('class', 'preset-icon-container');
+	      if (type === 'bicycle') {
+	        options.push('dismount');
+	      }
+	    }
 
-	        presetButton
-	            .append('div')
-	            .attr('class', 'label')
-	            .append('div')
-	            .attr('class', 'label-inner');
+	    return options.map(function (option) {
+	      return {
+	        title: field.t('options.' + option + '.description'),
+	        value: option
+	      };
+	    });
+	  };
 
-	        presetButtonWrap.append('div')
-	            .attr('class', 'accessory-buttons');
+	  var placeholdersByHighway = {
+	    footway: {
+	      foot: 'designated',
+	      motor_vehicle: 'no'
+	    },
+	    steps: {
+	      foot: 'yes',
+	      motor_vehicle: 'no',
+	      bicycle: 'no',
+	      horse: 'no'
+	    },
+	    pedestrian: {
+	      foot: 'yes',
+	      motor_vehicle: 'no'
+	    },
+	    cycleway: {
+	      motor_vehicle: 'no',
+	      bicycle: 'designated'
+	    },
+	    bridleway: {
+	      motor_vehicle: 'no',
+	      horse: 'designated'
+	    },
+	    path: {
+	      foot: 'yes',
+	      motor_vehicle: 'no',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    motorway: {
+	      foot: 'no',
+	      motor_vehicle: 'yes',
+	      bicycle: 'no',
+	      horse: 'no'
+	    },
+	    trunk: {
+	      motor_vehicle: 'yes'
+	    },
+	    primary: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    secondary: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    tertiary: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    residential: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    unclassified: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    service: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    motorway_link: {
+	      foot: 'no',
+	      motor_vehicle: 'yes',
+	      bicycle: 'no',
+	      horse: 'no'
+	    },
+	    trunk_link: {
+	      motor_vehicle: 'yes'
+	    },
+	    primary_link: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    secondary_link: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    tertiary_link: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    }
+	  };
+
+	  access.tags = function (tags) {
+	    _tags = tags;
+	    utilGetSetValue(items.selectAll('.preset-input-access'), function (d) {
+	      return typeof tags[d] === 'string' ? tags[d] : '';
+	    }).classed('mixed', function (d) {
+	      return tags[d] && Array.isArray(tags[d]);
+	    }).attr('title', function (d) {
+	      return tags[d] && Array.isArray(tags[d]) && tags[d].filter(Boolean).join('\n');
+	    }).attr('placeholder', function (d) {
+	      if (tags[d] && Array.isArray(tags[d])) {
+	        return _t('inspector.multiple_values');
+	      }
 
-	        var tagReferenceBodyWrap = selection
-	            .selectAll('.tag-reference-body-wrap')
-	            .data([0]);
+	      if (d === 'access') {
+	        return 'yes';
+	      }
 
-	        tagReferenceBodyWrap = tagReferenceBodyWrap
-	            .enter()
-	            .append('div')
-	            .attr('class', 'tag-reference-body-wrap')
-	            .merge(tagReferenceBodyWrap);
-
-	        // update header
-	        if (_tagReference) {
-	            selection.selectAll('.preset-list-button-wrap .accessory-buttons')
-	                .style('display', _presets.length === 1 ? null : 'none')
-	                .call(_tagReference.button);
-
-	            tagReferenceBodyWrap
-	                .style('display', _presets.length === 1 ? null : 'none')
-	                .call(_tagReference.body);
-	        }
-
-	        selection.selectAll('.preset-reset')
-	            .on('click', function() {
-	                 dispatch$1.call('choose', this, _presets);
-	            })
-	            .on('pointerdown pointerup mousedown mouseup', function() {
-	                event.preventDefault();
-	                event.stopPropagation();
-	            });
+	      if (tags.access && typeof tags.access === 'string') {
+	        return tags.access;
+	      }
 
-	        var geometries = entityGeometries();
-	        selection.select('.preset-list-item button')
-	            .call(uiPresetIcon()
-	                .geometry(_presets.length === 1 ? (geometries.length === 1 && geometries[0]) : null)
-	                .preset(_presets.length === 1 ? _presets[0] : _mainPresetIndex.item('point'))
-	            );
+	      if (tags.highway) {
+	        if (typeof tags.highway === 'string') {
+	          if (placeholdersByHighway[tags.highway] && placeholdersByHighway[tags.highway][d]) {
+	            return placeholdersByHighway[tags.highway][d];
+	          }
+	        } else {
+	          var impliedAccesses = tags.highway.filter(Boolean).map(function (highwayVal) {
+	            return placeholdersByHighway[highwayVal] && placeholdersByHighway[highwayVal][d];
+	          }).filter(Boolean);
 
-	        // NOTE: split on en-dash, not a hypen (to avoid conflict with hyphenated names)
-	        var names = _presets.length === 1 ? _presets[0].name().split(' – ') : [_t('inspector.multiple_types')];
+	          if (impliedAccesses.length === tags.highway.length && new Set(impliedAccesses).size === 1) {
+	            // if all the highway values have the same implied access for this type then use that
+	            return impliedAccesses[0];
+	          }
+	        }
+	      }
 
-	        var label = selection.select('.label-inner');
-	        var nameparts = label.selectAll('.namepart')
-	            .data(names, function(d) { return d; });
+	      return field.placeholder();
+	    });
+	  };
 
-	        nameparts.exit()
-	            .remove();
+	  access.focus = function () {
+	    items.selectAll('.preset-input-access').node().focus();
+	  };
 
-	        nameparts
-	            .enter()
-	            .append('div')
-	            .attr('class', 'namepart')
-	            .text(function(d) { return d; });
-	    }
+	  return utilRebind(access, dispatch, 'on');
+	}
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return section;
-	    };
+	function uiFieldAddress(field, context) {
+	  var dispatch = dispatch$8('change');
 
-	    section.presets = function(val) {
-	        if (!arguments.length) { return _presets; }
+	  var _selection = select(null);
 
-	        // don't reload the same preset
-	        if (!utilArrayIdentical(val, _presets)) {
-	            _presets = val;
+	  var _wrap = select(null);
 
-	            var geometries = entityGeometries();
-	            if (_presets.length === 1 && geometries.length) {
-	                _tagReference = uiTagReference(_presets[0].reference(geometries[0]))
-	                    .showing(false);
-	            }
-	        }
+	  var addrField = _mainPresetIndex.field('address'); // needed for placeholder strings
 
-	        return section;
-	    };
+	  var _entityIDs = [];
 
-	    function entityGeometries() {
+	  var _tags;
 
-	        var counts = {};
+	  var _countryCode;
 
-	        for (var i in _entityIDs) {
-	            var geometry = context.graph().geometry(_entityIDs[i]);
-	            if (!counts[geometry]) { counts[geometry] = 0; }
-	            counts[geometry] += 1;
-	        }
+	  var _addressFormats = [{
+	    format: [['housenumber', 'street'], ['city', 'postcode']]
+	  }];
+	  _mainFileFetcher.get('address_formats').then(function (d) {
+	    _addressFormats = d;
 
-	        return Object.keys(counts).sort(function(geom1, geom2) {
-	            return counts[geom2] - counts[geom1];
-	        });
+	    if (!_selection.empty()) {
+	      _selection.call(address);
 	    }
+	  })["catch"](function () {
+	    /* ignore */
+	  });
 
-	    return utilRebind(section, dispatch$1, 'on');
-	}
-
-	// This currently only works with the 'restrictions' field
-	// It borrows some code from uiHelp
-
-	function uiFieldHelp(context, fieldName) {
-	    var fieldHelp = {};
-	    var _inspector = select(null);
-	    var _wrap = select(null);
-	    var _body = select(null);
-
-	    var fieldHelpKeys = {
-	        restrictions: [
-	            ['about',[
-	                'about',
-	                'from_via_to',
-	                'maxdist',
-	                'maxvia'
-	            ]],
-	            ['inspecting',[
-	                'about',
-	                'from_shadow',
-	                'allow_shadow',
-	                'restrict_shadow',
-	                'only_shadow',
-	                'restricted',
-	                'only'
-	            ]],
-	            ['modifying',[
-	                'about',
-	                'indicators',
-	                'allow_turn',
-	                'restrict_turn',
-	                'only_turn'
-	            ]],
-	            ['tips',[
-	                'simple',
-	                'simple_example',
-	                'indirect',
-	                'indirect_example',
-	                'indirect_noedit'
-	            ]]
-	        ]
-	    };
+	  function getNearStreets() {
+	    var extent = combinedEntityExtent();
+	    var l = extent.center();
+	    var box = geoExtent(l).padByMeters(200);
+	    var streets = context.history().intersects(box).filter(isAddressable).map(function (d) {
+	      var loc = context.projection([(extent[0][0] + extent[1][0]) / 2, (extent[0][1] + extent[1][1]) / 2]);
+	      var choice = geoChooseEdge(context.graph().childNodes(d), loc, context.projection);
+	      return {
+	        title: d.tags.name,
+	        value: d.tags.name,
+	        dist: choice.distance
+	      };
+	    }).sort(function (a, b) {
+	      return a.dist - b.dist;
+	    });
+	    return utilArrayUniqBy(streets, 'value');
 
-	    var fieldHelpHeadings = {};
+	    function isAddressable(d) {
+	      return d.tags.highway && d.tags.name && d.type === 'way';
+	    }
+	  }
 
-	    var replacements = {
-	        distField: _t('restriction.controls.distance'),
-	        viaField: _t('restriction.controls.via'),
-	        fromShadow: icon('#iD-turn-shadow', 'pre-text shadow from'),
-	        allowShadow: icon('#iD-turn-shadow', 'pre-text shadow allow'),
-	        restrictShadow: icon('#iD-turn-shadow', 'pre-text shadow restrict'),
-	        onlyShadow: icon('#iD-turn-shadow', 'pre-text shadow only'),
-	        allowTurn: icon('#iD-turn-yes', 'pre-text turn'),
-	        restrictTurn: icon('#iD-turn-no', 'pre-text turn'),
-	        onlyTurn: icon('#iD-turn-only', 'pre-text turn')
-	    };
+	  function getNearCities() {
+	    var extent = combinedEntityExtent();
+	    var l = extent.center();
+	    var box = geoExtent(l).padByMeters(200);
+	    var cities = context.history().intersects(box).filter(isAddressable).map(function (d) {
+	      return {
+	        title: d.tags['addr:city'] || d.tags.name,
+	        value: d.tags['addr:city'] || d.tags.name,
+	        dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
+	      };
+	    }).sort(function (a, b) {
+	      return a.dist - b.dist;
+	    });
+	    return utilArrayUniqBy(cities, 'value');
 
+	    function isAddressable(d) {
+	      if (d.tags.name) {
+	        if (d.tags.admin_level === '8' && d.tags.boundary === 'administrative') return true;
+	        if (d.tags.border_type === 'city') return true;
+	        if (d.tags.place === 'city' || d.tags.place === 'town' || d.tags.place === 'village') return true;
+	      }
 
-	    // For each section, squash all the texts into a single markdown document
-	    var docs = fieldHelpKeys[fieldName].map(function(key) {
-	        var helpkey = 'help.field.' + fieldName + '.' + key[0];
-	        var text = key[1].reduce(function(all, part) {
-	            var subkey = helpkey + '.' + part;
-	            var depth = fieldHelpHeadings[subkey];                     // is this subkey a heading?
-	            var hhh = depth ? Array(depth + 1).join('#') + ' ' : '';   // if so, prepend with some ##'s
-	            return all + hhh + _t(subkey, replacements) + '\n\n';
-	        }, '');
+	      if (d.tags['addr:city']) return true;
+	      return false;
+	    }
+	  }
 
-	        return {
-	            key: helpkey,
-	            title: _t(helpkey + '.title'),
-	            html: marked_1(text.trim())
-	        };
+	  function getNearValues(key) {
+	    var extent = combinedEntityExtent();
+	    var l = extent.center();
+	    var box = geoExtent(l).padByMeters(200);
+	    var results = context.history().intersects(box).filter(function hasTag(d) {
+	      return _entityIDs.indexOf(d.id) === -1 && d.tags[key];
+	    }).map(function (d) {
+	      return {
+	        title: d.tags[key],
+	        value: d.tags[key],
+	        dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
+	      };
+	    }).sort(function (a, b) {
+	      return a.dist - b.dist;
 	    });
+	    return utilArrayUniqBy(results, 'value');
+	  }
 
+	  function updateForCountryCode() {
+	    if (!_countryCode) return;
+	    var addressFormat;
 
-	    function show() {
-	        updatePosition();
-
-	        _body
-	            .classed('hide', false)
-	            .style('opacity', '0')
-	            .transition()
-	            .duration(200)
-	            .style('opacity', '1');
-	    }
+	    for (var i = 0; i < _addressFormats.length; i++) {
+	      var format = _addressFormats[i];
 
+	      if (!format.countryCodes) {
+	        addressFormat = format; // choose the default format, keep going
+	      } else if (format.countryCodes.indexOf(_countryCode) !== -1) {
+	        addressFormat = format; // choose the country format, stop here
 
-	    function hide() {
-	        _body
-	            .classed('hide', true)
-	            .transition()
-	            .duration(200)
-	            .style('opacity', '0')
-	            .on('end', function () {
-	                _body.classed('hide', true);
-	            });
+	        break;
+	      }
 	    }
 
+	    var dropdowns = addressFormat.dropdowns || ['city', 'county', 'country', 'district', 'hamlet', 'neighbourhood', 'place', 'postcode', 'province', 'quarter', 'state', 'street', 'subdistrict', 'suburb'];
+	    var widths = addressFormat.widths || {
+	      housenumber: 1 / 3,
+	      street: 2 / 3,
+	      city: 2 / 3,
+	      state: 1 / 4,
+	      postcode: 1 / 3
+	    };
 
-	    function clickHelp(index) {
-	        var d = docs[index];
-	        var tkeys = fieldHelpKeys[fieldName][index][1];
-
-	        _body.selectAll('.field-help-nav-item')
-	            .classed('active', function(d, i) { return i === index; });
+	    function row(r) {
+	      // Normalize widths.
+	      var total = r.reduce(function (sum, key) {
+	        return sum + (widths[key] || 0.5);
+	      }, 0);
+	      return r.map(function (key) {
+	        return {
+	          id: key,
+	          width: (widths[key] || 0.5) / total
+	        };
+	      });
+	    }
 
-	        var content = _body.selectAll('.field-help-content')
-	            .html(d.html);
+	    var rows = _wrap.selectAll('.addr-row').data(addressFormat.format, function (d) {
+	      return d.toString();
+	    });
 
-	        // class the paragraphs so we can find and style them
-	        content.selectAll('p')
-	            .attr('class', function(d, i) { return tkeys[i]; });
+	    rows.exit().remove();
+	    rows.enter().append('div').attr('class', 'addr-row').selectAll('input').data(row).enter().append('input').property('type', 'text').call(updatePlaceholder).attr('class', function (d) {
+	      return 'addr-' + d.id;
+	    }).call(utilNoAuto).each(addDropdown).style('width', function (d) {
+	      return d.width * 100 + '%';
+	    });
 
-	        // insert special content for certain help sections
-	        if (d.key === 'help.field.restrictions.inspecting') {
-	            content
-	                .insert('img', 'p.from_shadow')
-	                .attr('class', 'field-help-image cf')
-	                .attr('src', context.imagePath('tr_inspect.gif'));
+	    function addDropdown(d) {
+	      if (dropdowns.indexOf(d.id) === -1) return; // not a dropdown
 
-	        } else if (d.key === 'help.field.restrictions.modifying') {
-	            content
-	                .insert('img', 'p.allow_turn')
-	                .attr('class', 'field-help-image cf')
-	                .attr('src', context.imagePath('tr_modify.gif'));
-	        }
+	      var nearValues = d.id === 'street' ? getNearStreets : d.id === 'city' ? getNearCities : getNearValues;
+	      select(this).call(uiCombobox(context, 'address-' + d.id).minItems(1).caseSensitive(true).fetcher(function (value, callback) {
+	        callback(nearValues('addr:' + d.id));
+	      }));
 	    }
 
+	    _wrap.selectAll('input').on('blur', change()).on('change', change());
 
-	    fieldHelp.button = function(selection) {
-	        if (_body.empty()) { return; }
+	    _wrap.selectAll('input:not(.combobox-input)').on('input', change(true));
 
-	        var button = selection.selectAll('.field-help-button')
-	            .data([0]);
+	    if (_tags) updateTags(_tags);
+	  }
 
-	        // enter/update
-	        button.enter()
-	            .append('button')
-	            .attr('class', 'field-help-button')
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-help'))
-	            .merge(button)
-	            .on('click', function () {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                if (_body.classed('hide')) {
-	                    show();
-	                } else {
-	                    hide();
-	                }
-	            });
-	    };
+	  function address(selection) {
+	    _selection = selection;
+	    _wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    _wrap = _wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(_wrap);
+	    var extent = combinedEntityExtent();
 
+	    if (extent) {
+	      var countryCode;
 
-	    function updatePosition() {
-	        var wrap = _wrap.node();
-	        var inspector = _inspector.node();
-	        var wRect = wrap.getBoundingClientRect();
-	        var iRect = inspector.getBoundingClientRect();
+	      if (context.inIntro()) {
+	        // localize the address format for the walkthrough
+	        countryCode = _t('intro.graph.countrycode');
+	      } else {
+	        var center = extent.center();
+	        countryCode = iso1A2Code(center);
+	      }
 
-	        _body
-	            .style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
+	      if (countryCode) {
+	        _countryCode = countryCode.toLowerCase();
+	        updateForCountryCode();
+	      }
 	    }
+	  }
 
+	  function change(onInput) {
+	    return function () {
+	      var tags = {};
 
-	    fieldHelp.body = function(selection) {
-	        // This control expects the field to have a form-field-input-wrap div
-	        _wrap = selection.selectAll('.form-field-input-wrap');
-	        if (_wrap.empty()) { return; }
-
-	        // absolute position relative to the inspector, so it "floats" above the fields
-	        _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
-	        if (_inspector.empty()) { return; }
-
-	        _body = _inspector.selectAll('.field-help-body')
-	            .data([0]);
+	      _wrap.selectAll('input').each(function (subfield) {
+	        var key = field.key + ':' + subfield.id;
+	        var value = this.value;
+	        if (!onInput) value = context.cleanTagValue(value); // don't override multiple values with blank string
 
-	        var enter = _body.enter()
-	            .append('div')
-	            .attr('class', 'field-help-body hide');   // initially hidden
+	        if (Array.isArray(_tags[key]) && !value) return;
+	        tags[key] = value || undefined;
+	      });
 
-	        var titleEnter = enter
-	            .append('div')
-	            .attr('class', 'field-help-title cf');
-
-	        titleEnter
-	            .append('h2')
-	            .attr('class', ((_mainLocalizer.textDirection() === 'rtl') ? 'fr' : 'fl'))
-	            .text(_t('help.field.' + fieldName + '.title'));
-
-	        titleEnter
-	            .append('button')
-	            .attr('class', 'fr close')
-	            .on('click', function() {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                hide();
-	            })
-	            .call(svgIcon('#iD-icon-close'));
-
-	        var navEnter = enter
-	            .append('div')
-	            .attr('class', 'field-help-nav cf');
+	      dispatch.call('change', this, tags, onInput);
+	    };
+	  }
 
-	        var titles = docs.map(function(d) { return d.title; });
-	        navEnter.selectAll('.field-help-nav-item')
-	            .data(titles)
-	            .enter()
-	            .append('div')
-	            .attr('class', 'field-help-nav-item')
-	            .text(function(d) { return d; })
-	            .on('click', function(d, i) {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                clickHelp(i);
-	            });
+	  function updatePlaceholder(inputSelection) {
+	    return inputSelection.attr('placeholder', function (subfield) {
+	      if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
+	        return _t('inspector.multiple_values');
+	      }
 
-	        enter
-	            .append('div')
-	            .attr('class', 'field-help-content');
+	      if (_countryCode) {
+	        var localkey = subfield.id + '!' + _countryCode;
+	        var tkey = addrField.hasTextForStringId('placeholders.' + localkey) ? localkey : subfield.id;
+	        return addrField.t('placeholders.' + tkey);
+	      }
+	    });
+	  }
 
-	        _body = _body
-	            .merge(enter);
+	  function updateTags(tags) {
+	    utilGetSetValue(_wrap.selectAll('input'), function (subfield) {
+	      var val = tags[field.key + ':' + subfield.id];
+	      return typeof val === 'string' ? val : '';
+	    }).attr('title', function (subfield) {
+	      var val = tags[field.key + ':' + subfield.id];
+	      return val && Array.isArray(val) ? val.filter(Boolean).join('\n') : undefined;
+	    }).classed('mixed', function (subfield) {
+	      return Array.isArray(tags[field.key + ':' + subfield.id]);
+	    }).call(updatePlaceholder);
+	  }
 
-	        clickHelp(0);
-	    };
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
+	  address.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return address;
+	  };
 
-	    return fieldHelp;
-	}
+	  address.tags = function (tags) {
+	    _tags = tags;
+	    updateTags(tags);
+	  };
 
-	function uiFieldCheck(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var options = field.strings && field.strings.options;
-	    var values = [];
-	    var texts = [];
+	  address.focus = function () {
+	    var node = _wrap.selectAll('input').node();
 
-	    var _tags;
+	    if (node) node.focus();
+	  };
 
-	    var input = select(null);
-	    var text = select(null);
-	    var label = select(null);
-	    var reverser = select(null);
+	  return utilRebind(address, dispatch, 'on');
+	}
 
-	    var _impliedYes;
-	    var _entityIDs = [];
-	    var _value;
+	function uiFieldCycleway(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var items = select(null);
+	  var wrap = select(null);
 
+	  var _tags;
 
-	    if (options) {
-	        for (var k in options) {
-	            values.push(k === 'undefined' ? undefined : k);
-	            texts.push(field.t('options.' + k, { 'default': options[k] }));
-	        }
-	    } else {
-	        values = [undefined, 'yes'];
-	        texts = [_t('inspector.unknown'), _t('inspector.check.yes')];
-	        if (field.type !== 'defaultCheck') {
-	            values.push('no');
-	            texts.push(_t('inspector.check.no'));
-	        }
+	  function cycleway(selection) {
+	    function stripcolon(s) {
+	      return s.replace(':', '');
 	    }
 
+	    wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    var div = wrap.selectAll('ul').data([0]);
+	    div = div.enter().append('ul').attr('class', 'rows').merge(div);
+	    var keys = ['cycleway:left', 'cycleway:right'];
+	    items = div.selectAll('li').data(keys);
+	    var enter = items.enter().append('li').attr('class', function (d) {
+	      return 'labeled-input preset-cycleway-' + stripcolon(d);
+	    });
+	    enter.append('span').attr('class', 'label preset-label-cycleway').attr('for', function (d) {
+	      return 'preset-input-cycleway-' + stripcolon(d);
+	    }).html(function (d) {
+	      return field.t.html('types.' + d);
+	    });
+	    enter.append('div').attr('class', 'preset-input-cycleway-wrap').append('input').attr('type', 'text').attr('class', function (d) {
+	      return 'preset-input-cycleway preset-input-' + stripcolon(d);
+	    }).call(utilNoAuto).each(function (d) {
+	      select(this).call(uiCombobox(context, 'cycleway-' + stripcolon(d)).data(cycleway.options(d)));
+	    });
+	    items = items.merge(enter); // Update
 
-	    // Checks tags to see whether an undefined value is "Assumed to be Yes"
-	    function checkImpliedYes() {
-	        _impliedYes = (field.id === 'oneway_yes');
+	    wrap.selectAll('.preset-input-cycleway').on('change', change).on('blur', change);
+	  }
 
-	        // hack: pretend `oneway` field is a `oneway_yes` field
-	        // where implied oneway tag exists (e.g. `junction=roundabout`) #2220, #1841
-	        if (field.id === 'oneway') {
-	            var entity = context.entity(_entityIDs[0]);
-	            for (var key in entity.tags) {
-	                if (key in osmOneWayTags && (entity.tags[key] in osmOneWayTags[key])) {
-	                    _impliedYes = true;
-	                    texts[0] = _t('presets.fields.oneway_yes.options.undefined');
-	                    break;
-	                }
-	            }
-	        }
-	    }
+	  function change(d3_event, key) {
+	    var newValue = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
 
+	    if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) return;
 
-	    function reverserHidden() {
-	        if (!context.container().select('div.inspector-hover').empty()) { return true; }
-	        return !(_value === 'yes' || (_impliedYes && !_value));
+	    if (newValue === 'none' || newValue === '') {
+	      newValue = undefined;
 	    }
 
+	    var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
+	    var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];
 
-	    function reverserSetText(selection) {
-	        var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
-	        if (reverserHidden() || !entity) { return selection; }
-
-	        var first = entity.first();
-	        var last = entity.isClosed() ? entity.nodes[entity.nodes.length - 2] : entity.last();
-	        var pseudoDirection = first < last;
-	        var icon = pseudoDirection ? '#iD-icon-forward' : '#iD-icon-backward';
-
-	        selection.selectAll('.reverser-span')
-	            .text(_t('inspector.check.reverser'))
-	            .call(svgIcon(icon, 'inline'));
+	    if (otherValue && Array.isArray(otherValue)) {
+	      // we must always have an explicit value for comparison
+	      otherValue = otherValue[0];
+	    }
 
-	        return selection;
+	    if (otherValue === 'none' || otherValue === '') {
+	      otherValue = undefined;
 	    }
 
+	    var tag = {}; // If the left and right tags match, use the cycleway tag to tag both
+	    // sides the same way
 
-	    var check = function(selection) {
-	        checkImpliedYes();
+	    if (newValue === otherValue) {
+	      tag = {
+	        cycleway: newValue,
+	        'cycleway:left': undefined,
+	        'cycleway:right': undefined
+	      };
+	    } else {
+	      // Always set both left and right as changing one can affect the other
+	      tag = {
+	        cycleway: undefined
+	      };
+	      tag[key] = newValue;
+	      tag[otherKey] = otherValue;
+	    }
 
-	        label = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    dispatch.call('change', this, tag);
+	  }
 
-	        var enter = label.enter()
-	            .append('label')
-	            .attr('class', 'form-field-input-wrap form-field-input-check');
+	  cycleway.options = function () {
+	    return field.options.map(function (option) {
+	      return {
+	        title: field.t('options.' + option + '.description'),
+	        value: option
+	      };
+	    });
+	  };
 
-	        enter
-	            .append('input')
-	            .property('indeterminate', field.type !== 'defaultCheck')
-	            .attr('type', 'checkbox')
-	            .attr('id', field.domId);
+	  cycleway.tags = function (tags) {
+	    _tags = tags; // If cycleway is set, use that instead of individual values
 
-	        enter
-	            .append('span')
-	            .text(texts[0])
-	            .attr('class', 'value');
+	    var commonValue = typeof tags.cycleway === 'string' && tags.cycleway;
+	    utilGetSetValue(items.selectAll('.preset-input-cycleway'), function (d) {
+	      if (commonValue) return commonValue;
+	      return !tags.cycleway && typeof tags[d] === 'string' ? tags[d] : '';
+	    }).attr('title', function (d) {
+	      if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
+	        var vals = [];
 
-	        if (field.type === 'onewayCheck') {
-	            enter
-	                .append('a')
-	                .attr('class', 'reverser button' + (reverserHidden() ? ' hide' : ''))
-	                .attr('href', '#')
-	                .append('span')
-	                .attr('class', 'reverser-span');
+	        if (Array.isArray(tags.cycleway)) {
+	          vals = vals.concat(tags.cycleway);
 	        }
 
-	        label = label.merge(enter);
-	        input = label.selectAll('input');
-	        text = label.selectAll('span.value');
-
-	        input
-	            .on('click', function() {
-	                event.stopPropagation();
-	                var t = {};
-
-	                if (Array.isArray(_tags[field.key])) {
-	                    if (values.indexOf('yes') !== -1) {
-	                        t[field.key] = 'yes';
-	                    } else {
-	                        t[field.key] = values[0];
-	                    }
-	                } else {
-	                    t[field.key] = values[(values.indexOf(_value) + 1) % values.length];
-	                }
-
-	                // Don't cycle through `alternating` or `reversible` states - #4970
-	                // (They are supported as translated strings, but should not toggle with clicks)
-	                if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
-	                    t[field.key] = values[0];
-	                }
-
-	                dispatch$1.call('change', this, t);
-	            });
-
-	        if (field.type === 'onewayCheck') {
-	            reverser = label.selectAll('.reverser');
-
-	            reverser
-	                .call(reverserSetText)
-	                .on('click', function() {
-	                    event.preventDefault();
-	                    event.stopPropagation();
-	                    context.perform(
-	                        function(graph) {
-	                            for (var i in _entityIDs) {
-	                                graph = actionReverse(_entityIDs[i])(graph);
-	                            }
-	                            return graph;
-	                        },
-	                        _t('operations.reverse.annotation')
-	                    );
-
-	                    // must manually revalidate since no 'change' event was called
-	                    context.validator().validate();
-
-	                    select(this)
-	                        .call(reverserSetText);
-	                });
+	        if (Array.isArray(tags[d])) {
+	          vals = vals.concat(tags[d]);
 	        }
-	    };
-
 
-	    check.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return check;
-	    };
+	        return vals.filter(Boolean).join('\n');
+	      }
 
+	      return null;
+	    }).attr('placeholder', function (d) {
+	      if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
+	        return _t('inspector.multiple_values');
+	      }
 
-	    check.tags = function(tags) {
+	      return field.placeholder();
+	    }).classed('mixed', function (d) {
+	      return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
+	    });
+	  };
 
-	        _tags = tags;
+	  cycleway.focus = function () {
+	    var node = wrap.selectAll('input').node();
+	    if (node) node.focus();
+	  };
 
-	        function isChecked(val) {
-	            return val !== 'no' && val !== '' && val !== undefined && val !== null;
-	        }
+	  return utilRebind(cycleway, dispatch, 'on');
+	}
 
-	        function textFor(val) {
-	            if (val === '') { val = undefined; }
-	            var index = values.indexOf(val);
-	            return (index !== -1 ? texts[index] : ('"' + val + '"'));
-	        }
+	function uiFieldLanes(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var LANE_WIDTH = 40;
+	  var LANE_HEIGHT = 200;
+	  var _entityIDs = [];
 
-	        checkImpliedYes();
+	  function lanes(selection) {
+	    var lanesData = context.entity(_entityIDs[0]).lanes();
 
-	        var isMixed = Array.isArray(tags[field.key]);
+	    if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
+	      selection.call(lanes.off);
+	      return;
+	    }
 
-	        _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    var surface = wrap.selectAll('.surface').data([0]);
+	    var d = utilGetDimensions(wrap);
+	    var freeSpace = d[0] - lanesData.lanes.length * LANE_WIDTH * 1.5 + LANE_WIDTH * 0.5;
+	    surface = surface.enter().append('svg').attr('width', d[0]).attr('height', 300).attr('class', 'surface').merge(surface);
+	    var lanesSelection = surface.selectAll('.lanes').data([0]);
+	    lanesSelection = lanesSelection.enter().append('g').attr('class', 'lanes').merge(lanesSelection);
+	    lanesSelection.attr('transform', function () {
+	      return 'translate(' + freeSpace / 2 + ', 0)';
+	    });
+	    var lane = lanesSelection.selectAll('.lane').data(lanesData.lanes);
+	    lane.exit().remove();
+	    var enter = lane.enter().append('g').attr('class', 'lane');
+	    enter.append('g').append('rect').attr('y', 50).attr('width', LANE_WIDTH).attr('height', LANE_HEIGHT);
+	    enter.append('g').attr('class', 'forward').append('text').attr('y', 40).attr('x', 14).text('▲');
+	    enter.append('g').attr('class', 'bothways').append('text').attr('y', 40).attr('x', 14).text('▲▼');
+	    enter.append('g').attr('class', 'backward').append('text').attr('y', 40).attr('x', 14).text('▼');
+	    lane = lane.merge(enter);
+	    lane.attr('transform', function (d) {
+	      return 'translate(' + LANE_WIDTH * d.index * 1.5 + ', 0)';
+	    });
+	    lane.select('.forward').style('visibility', function (d) {
+	      return d.direction === 'forward' ? 'visible' : 'hidden';
+	    });
+	    lane.select('.bothways').style('visibility', function (d) {
+	      return d.direction === 'bothways' ? 'visible' : 'hidden';
+	    });
+	    lane.select('.backward').style('visibility', function (d) {
+	      return d.direction === 'backward' ? 'visible' : 'hidden';
+	    });
+	  }
 
-	        if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
-	            _value = 'yes';
-	        }
+	  lanes.entityIDs = function (val) {
+	    _entityIDs = val;
+	  };
 
-	        input
-	            .property('indeterminate', isMixed || (field.type !== 'defaultCheck' && !_value))
-	            .property('checked', isChecked(_value));
+	  lanes.tags = function () {};
 
-	        text
-	            .text(isMixed ? _t('inspector.multiple_values') : textFor(_value))
-	            .classed('mixed', isMixed);
+	  lanes.focus = function () {};
 
-	        label
-	            .classed('set', !!_value);
+	  lanes.off = function () {};
 
-	        if (field.type === 'onewayCheck') {
-	            reverser
-	                .classed('hide', reverserHidden())
-	                .call(reverserSetText);
-	        }
-	    };
+	  return utilRebind(lanes, dispatch, 'on');
+	}
+	uiFieldLanes.supportsMultiselection = false;
 
+	var _languagesArray = [];
+	function uiFieldLocalized(field, context) {
+	  var dispatch = dispatch$8('change', 'input');
+	  var wikipedia = services.wikipedia;
+	  var input = select(null);
+	  var localizedInputs = select(null);
 
-	    check.focus = function() {
-	        input.node().focus();
-	    };
+	  var _countryCode;
 
-	    return utilRebind(check, dispatch$1, 'on');
-	}
+	  var _tags; // A concern here in switching to async data means that _languagesArray will not
+	  // be available the first time through, so things like the fetchers and
+	  // the language() function will not work immediately.
 
-	function uiFieldCombo(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var taginfo = services.taginfo;
-	    var isMulti = (field.type === 'multiCombo');
-	    var isNetwork = (field.type === 'networkCombo');
-	    var isSemi = (field.type === 'semiCombo');
-	    var optstrings = field.strings && field.strings.options;
-	    var optarray = field.options;
-	    var snake_case = (field.snake_case || (field.snake_case === undefined));
-	    var caseSensitive = field.caseSensitive;
-	    var combobox = uiCombobox(context, 'combo-' + field.safeid)
-	        .caseSensitive(caseSensitive)
-	        .minItems(isMulti || isSemi ? 1 : 2);
-	    var container = select(null);
-	    var inputWrap = select(null);
-	    var input = select(null);
-	    var _comboData = [];
-	    var _multiData = [];
-	    var _entityIDs = [];
-	    var _tags;
-	    var _countryCode;
-	    var _staticPlaceholder;
-
-	    // initialize deprecated tags array
-	    var _dataDeprecated = [];
-	    _mainFileFetcher.get('deprecated')
-	        .then(function(d) { _dataDeprecated = d; })
-	        .catch(function() { /* ignore */ });
-
-
-	    // ensure multiCombo field.key ends with a ':'
-	    if (isMulti && /[^:]$/.test(field.key)) {
-	        field.key += ':';
-	    }
-
-
-	    function snake(s) {
-	        return s.replace(/\s+/g, '_');
-	    }
-
-	    function unsnake(s) {
-	        return s.replace(/_+/g, ' ');
-	    }
-
-	    function clean(s) {
-	        return s.split(';')
-	            .map(function(s) { return s.trim(); })
-	            .join(';');
-	    }
 
+	  _mainFileFetcher.get('languages').then(loadLanguagesArray)["catch"](function () {
+	    /* ignore */
+	  });
+	  var _territoryLanguages = {};
+	  _mainFileFetcher.get('territory_languages').then(function (d) {
+	    _territoryLanguages = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  }); // reuse these combos
 
-	    // returns the tag value for a display value
-	    // (for multiCombo, dval should be the key suffix, not the entire key)
-	    function tagValue(dval) {
-	        dval = clean(dval || '');
+	  var langCombo = uiCombobox(context, 'localized-lang').fetcher(fetchLanguages).minItems(0);
 
-	        if (optstrings) {
-	            var found = _comboData.find(function(o) {
-	                return o.key && clean(o.value) === dval;
-	            });
-	            if (found) {
-	                return found.key;
-	            }
-	        }
+	  var _selection = select(null);
 
-	        if (field.type === 'typeCombo' && !dval) {
-	            return 'yes';
-	        }
+	  var _multilingual = [];
 
-	        return (snake_case ? snake(dval) : dval) || undefined;
-	    }
+	  var _buttonTip = uiTooltip().title(_t.html('translate.translate')).placement('left');
 
+	  var _wikiTitles;
 
-	    // returns the display value for a tag value
-	    // (for multiCombo, tval should be the key suffix, not the entire key)
-	    function displayValue(tval) {
-	        tval = tval || '';
+	  var _entityIDs = [];
 
-	        if (optstrings) {
-	            var found = _comboData.find(function(o) {
-	                return o.key === tval && o.value;
-	            });
-	            if (found) {
-	                return found.value;
-	            }
-	        }
+	  function loadLanguagesArray(dataLanguages) {
+	    if (_languagesArray.length !== 0) return; // some conversion is needed to ensure correct OSM tags are used
 
-	        if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
-	            return '';
-	        }
+	    var replacements = {
+	      sr: 'sr-Cyrl',
+	      // in OSM, `sr` implies Cyrillic
+	      'sr-Cyrl': false // `sr-Cyrl` isn't used in OSM
 
-	        return snake_case ? unsnake(tval) : tval;
-	    }
+	    };
 
+	    for (var code in dataLanguages) {
+	      if (replacements[code] === false) continue;
+	      var metaCode = code;
+	      if (replacements[code]) metaCode = replacements[code];
 
-	    // Compute the difference between arrays of objects by `value` property
-	    //
-	    // objectDifference([{value:1}, {value:2}, {value:3}], [{value:2}])
-	    // > [{value:1}, {value:3}]
-	    //
-	    function objectDifference(a, b) {
-	        return a.filter(function(d1) {
-	            return !b.some(function(d2) {
-	                return !d2.isMixed && d1.value === d2.value;
-	            });
-	        });
+	      _languagesArray.push({
+	        localName: _mainLocalizer.languageName(metaCode, {
+	          localOnly: true
+	        }),
+	        nativeName: dataLanguages[metaCode].nativeName,
+	        code: code,
+	        label: _mainLocalizer.languageName(metaCode)
+	      });
 	    }
+	  }
 
+	  function calcLocked() {
+	    // Protect name field for suggestion presets that don't display a brand/operator field
+	    var isLocked = field.id === 'name' && _entityIDs.length && _entityIDs.some(function (entityID) {
+	      var entity = context.graph().hasEntity(entityID);
+	      if (!entity) return false; // Features linked to Wikidata are likely important and should be protected
 
-	    function initCombo(selection, attachTo) {
-	        if (optstrings) {
-	            selection.attr('readonly', 'readonly');
-	            selection.call(combobox, attachTo);
-	            setStaticValues(setPlaceholder);
+	      if (entity.tags.wikidata) return true; // Assume the name has already been confirmed if its source has been researched
 
-	        } else if (optarray) {
-	            selection.call(combobox, attachTo);
-	            setStaticValues(setPlaceholder);
+	      if (entity.tags['name:etymology:wikidata']) return true; // Lock the `name` if this is a suggestion preset that assigns the name,
+	      // and the preset does not display a `brand` or `operator` field.
+	      // (For presets like hotels, car dealerships, post offices, the `name` should remain editable)
+	      // see also similar logic in `outdated_tags.js`
 
-	        } else if (taginfo) {
-	            selection.call(combobox.fetcher(setTaginfoValues), attachTo);
-	            setTaginfoValues('', setPlaceholder);
-	        }
-	    }
+	      var preset = _mainPresetIndex.match(entity, context.graph());
 
+	      if (preset) {
+	        var isSuggestion = preset.suggestion;
+	        var fields = preset.fields();
+	        var showsBrandField = fields.some(function (d) {
+	          return d.id === 'brand';
+	        });
+	        var showsOperatorField = fields.some(function (d) {
+	          return d.id === 'operator';
+	        });
+	        var setsName = preset.addTags.name;
+	        var setsBrandWikidata = preset.addTags['brand:wikidata'];
+	        var setsOperatorWikidata = preset.addTags['operator:wikidata'];
+	        return isSuggestion && setsName && (setsBrandWikidata && !showsBrandField || setsOperatorWikidata && !showsOperatorField);
+	      }
 
-	    function setStaticValues(callback) {
-	        if (!(optstrings || optarray)) { return; }
+	      return false;
+	    });
 
-	        if (optstrings) {
-	            _comboData = Object.keys(optstrings).map(function(k) {
-	                var v = field.t('options.' + k, { 'default': optstrings[k] });
-	                return {
-	                    key: k,
-	                    value: v,
-	                    title: v
-	                };
-	            });
+	    field.locked(isLocked);
+	  } // update _multilingual, maintaining the existing order
 
-	        } else if (optarray) {
-	            _comboData = optarray.map(function(k) {
-	                var v = snake_case ? unsnake(k) : k;
-	                return {
-	                    key: k,
-	                    value: v,
-	                    title: v
-	                };
-	            });
-	        }
 
-	        combobox.data(objectDifference(_comboData, _multiData));
-	        if (callback) { callback(_comboData); }
-	    }
+	  function calcMultilingual(tags) {
+	    var existingLangsOrdered = _multilingual.map(function (item) {
+	      return item.lang;
+	    });
 
+	    var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
 
-	    function setTaginfoValues(q, callback) {
-	        var fn = isMulti ? 'multikeys' : 'values';
-	        var query = (isMulti ? field.key : '') + q;
-	        var hasCountryPrefix = isNetwork && _countryCode && _countryCode.indexOf(q.toLowerCase()) === 0;
-	        if (hasCountryPrefix) {
-	            query = _countryCode + ':';
-	        }
+	    for (var k in tags) {
+	      var m = k.match(/^(.*):(.*)$/);
 
-	        var params = {
-	            debounce: (q !== ''),
-	            key: field.key,
-	            query: query
+	      if (m && m[1] === field.key && m[2]) {
+	        var item = {
+	          lang: m[2],
+	          value: tags[k]
 	        };
 
-	        if (_entityIDs.length) {
-	            params.geometry = context.graph().geometry(_entityIDs[0]);
+	        if (existingLangs.has(item.lang)) {
+	          // update the value
+	          _multilingual[existingLangsOrdered.indexOf(item.lang)].value = item.value;
+	          existingLangs["delete"](item.lang);
+	        } else {
+	          _multilingual.push(item);
 	        }
+	      }
+	    } // Don't remove items based on deleted tags, since this makes the UI
+	    // disappear unexpectedly when clearing values - #8164
 
-	        taginfo[fn](params, function(err, data) {
-	            if (err) { return; }
-
-	            data = data.filter(function(d) {
-
-	                if (field.type === 'typeCombo' && d.value === 'yes') {
-	                    // don't show the fallback value
-	                    return false;
-	                }
 
-	                // don't show values with very low usage
-	                return !d.count || d.count > 10;
-	            });
+	    _multilingual.forEach(function (item) {
+	      if (item.lang && existingLangs.has(item.lang)) {
+	        item.value = '';
+	      }
+	    });
+	  }
 
-	            var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
-	            if (deprecatedValues) {
-	                // don't suggest deprecated tag values
-	                data = data.filter(function(d) {
-	                    return deprecatedValues.indexOf(d.value) === -1;
-	                });
-	            }
+	  function localized(selection) {
+	    _selection = selection;
+	    calcLocked();
+	    var isLocked = field.locked();
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]); // enter/update
 
-	            if (hasCountryPrefix) {
-	                data = data.filter(function(d) {
-	                    return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
-	                });
-	            }
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    input = wrap.selectAll('.localized-main').data([0]); // enter/update
 
-	            // hide the caret if there are no suggestions
-	            container.classed('empty-combobox', data.length === 0);
-
-	            _comboData = data.map(function(d) {
-	                var k = d.value;
-	                if (isMulti) { k = k.replace(field.key, ''); }
-	                var v = snake_case ? unsnake(k) : k;
-	                return {
-	                    key: k,
-	                    value: v,
-	                    title: isMulti ? v : d.title
-	                };
-	            });
+	    input = input.enter().append('input').attr('type', 'text').attr('id', field.domId).attr('class', 'localized-main').call(utilNoAuto).merge(input);
+	    input.classed('disabled', !!isLocked).attr('readonly', isLocked || null).on('input', change(true)).on('blur', change()).on('change', change());
+	    var translateButton = wrap.selectAll('.localized-add').data([0]);
+	    translateButton = translateButton.enter().append('button').attr('class', 'localized-add form-field-button').attr('aria-label', _t('icons.plus')).call(svgIcon('#iD-icon-plus')).merge(translateButton);
+	    translateButton.classed('disabled', !!isLocked).call(isLocked ? _buttonTip.destroy : _buttonTip).on('click', addNew);
 
-	            _comboData = objectDifference(_comboData, _multiData);
-	            if (callback) { callback(_comboData); }
-	        });
+	    if (_tags && !_multilingual.length) {
+	      calcMultilingual(_tags);
 	    }
 
+	    localizedInputs = selection.selectAll('.localized-multilingual').data([0]);
+	    localizedInputs = localizedInputs.enter().append('div').attr('class', 'localized-multilingual').merge(localizedInputs);
+	    localizedInputs.call(renderMultilingual);
+	    localizedInputs.selectAll('button, input').classed('disabled', !!isLocked).attr('readonly', isLocked || null);
+	    selection.selectAll('.combobox-caret').classed('nope', true);
 
-	    function setPlaceholder(values) {
+	    function addNew(d3_event) {
+	      d3_event.preventDefault();
+	      if (field.locked()) return;
+	      var defaultLang = _mainLocalizer.languageCode().toLowerCase();
 
-	        if (isMulti || isSemi) {
-	            _staticPlaceholder = field.placeholder() || _t('inspector.add');
-	        } else {
-	            var vals = values
-	                .map(function(d) { return d.value; })
-	                .filter(function(s) { return s.length < 20; });
+	      var langExists = _multilingual.find(function (datum) {
+	        return datum.lang === defaultLang;
+	      });
 
-	            var placeholders = vals.length > 1 ? vals : values.map(function(d) { return d.key; });
-	            _staticPlaceholder = field.placeholder() || placeholders.slice(0, 3).join(', ');
-	        }
+	      var isLangEn = defaultLang.indexOf('en') > -1;
 
-	        if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
-	            _staticPlaceholder += '…';
-	        }
+	      if (isLangEn || langExists) {
+	        defaultLang = '';
+	        langExists = _multilingual.find(function (datum) {
+	          return datum.lang === defaultLang;
+	        });
+	      }
 
-	        var ph;
-	        if (!isMulti && !isSemi && _tags && Array.isArray(_tags[field.key])) {
-	            ph = _t('inspector.multiple_values');
-	        } else {
-	            ph =  _staticPlaceholder;
-	        }
+	      if (!langExists) {
+	        // prepend the value so it appears at the top
+	        _multilingual.unshift({
+	          lang: defaultLang,
+	          value: ''
+	        });
 
-	        container.selectAll('input')
-	            .attr('placeholder', ph);
+	        localizedInputs.call(renderMultilingual);
+	      }
 	    }
 
+	    function change(onInput) {
+	      return function (d3_event) {
+	        if (field.locked()) {
+	          d3_event.preventDefault();
+	          return;
+	        }
 
-	    function change() {
+	        var val = utilGetSetValue(select(this));
+	        if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
+
+	        if (!val && Array.isArray(_tags[field.key])) return;
 	        var t = {};
-	        var val;
-
-	        if (isMulti || isSemi) {
-	            val = tagValue(utilGetSetValue(input).replace(/,/g, ';')) || '';
-	            container.classed('active', false);
-	            utilGetSetValue(input, '');
-
-	            var vals = val.split(';').filter(Boolean);
-	            if (!vals.length) { return; }
-
-	            if (isMulti) {
-	                utilArrayUniq(vals).forEach(function(v) {
-	                    var key = field.key + v;
-	                    if (_tags) {
-	                        // don't set a multicombo value to 'yes' if it already has a non-'no' value
-	                        // e.g. `language:de=main`
-	                        var old = _tags[key];
-	                        if (typeof old === 'string' && old.toLowerCase() !== 'no') { return; }
-	                    }
-	                    key = context.cleanTagKey(key);
-	                    field.keys.push(key);
-	                    t[key] = 'yes';
-	                });
+	        t[field.key] = val || undefined;
+	        dispatch.call('change', this, t, onInput);
+	      };
+	    }
+	  }
 
-	            } else if (isSemi) {
-	                var arr = _multiData.map(function(d) { return d.key; });
-	                arr = arr.concat(vals);
-	                t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
-	            }
+	  function key(lang) {
+	    return field.key + ':' + lang;
+	  }
 
-	            window.setTimeout(function() { input.node().focus(); }, 10);
+	  function changeLang(d3_event, d) {
+	    var tags = {}; // make sure unrecognized suffixes are lowercase - #7156
 
-	        } else {
-	            var rawValue = utilGetSetValue(input);
+	    var lang = utilGetSetValue(select(this)).toLowerCase();
 
-	            // don't override multiple values with blank string
-	            if (!rawValue && Array.isArray(_tags[field.key])) { return; }
+	    var language = _languagesArray.find(function (d) {
+	      return d.label.toLowerCase() === lang || d.localName && d.localName.toLowerCase() === lang || d.nativeName && d.nativeName.toLowerCase() === lang;
+	    });
 
-	            val = context.cleanTagValue(tagValue(rawValue));
-	            t[field.key] = val || undefined;
-	        }
+	    if (language) lang = language.code;
 
-	        dispatch$1.call('change', this, t);
+	    if (d.lang && d.lang !== lang) {
+	      tags[key(d.lang)] = undefined;
 	    }
 
+	    var newKey = lang && context.cleanTagKey(key(lang));
+	    var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));
 
-	    function removeMultikey(d) {
-	        event.stopPropagation();
-	        var t = {};
-	        if (isMulti) {
-	            t[d.key] = undefined;
-	        } else if (isSemi) {
-	            var arr = _multiData.map(function(md) {
-	                return md.key === d.key ? null : md.key;
-	            }).filter(Boolean);
-
-	            arr = utilArrayUniq(arr);
-	            t[field.key] = arr.length ? arr.join(';') : undefined;
-	        }
-	        dispatch$1.call('change', this, t);
+	    if (newKey && value) {
+	      tags[newKey] = value;
+	    } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
+	      tags[newKey] = _wikiTitles[d.lang];
 	    }
 
+	    d.lang = lang;
+	    dispatch.call('change', this, tags);
+	  }
 
-	    function combo(selection) {
-	        container = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
-
-	        var type = (isMulti || isSemi) ? 'multicombo': 'combo';
-	        container = container.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + type)
-	            .merge(container);
-
-	        if (isMulti || isSemi) {
-	            container = container.selectAll('.chiplist')
-	                .data([0]);
-
-	            var listClass = 'chiplist';
-
-	            // Use a separate line for each value in the Destinations field
-	            // to mimic highway exit signs
-	            if (field.key === 'destination') {
-	                listClass += ' full-line-chips';
-	            }
+	  function changeValue(d3_event, d) {
+	    if (!d.lang) return;
+	    var value = context.cleanTagValue(utilGetSetValue(select(this))) || undefined; // don't override multiple values with blank string
 
-	            container = container.enter()
-	                .append('ul')
-	                .attr('class', listClass)
-	                .on('click', function() {
-	                    window.setTimeout(function() { input.node().focus(); }, 10);
-	                })
-	                .merge(container);
+	    if (!value && Array.isArray(d.value)) return;
+	    var t = {};
+	    t[key(d.lang)] = value;
+	    d.value = value;
+	    dispatch.call('change', this, t);
+	  }
 
+	  function fetchLanguages(value, cb) {
+	    var v = value.toLowerCase(); // show the user's language first
 
-	            inputWrap = container.selectAll('.input-wrap')
-	                .data([0]);
+	    var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
 
-	            inputWrap = inputWrap.enter()
-	                .append('li')
-	                .attr('class', 'input-wrap')
-	                .merge(inputWrap);
+	    if (_countryCode && _territoryLanguages[_countryCode]) {
+	      langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
+	    }
 
-	            input = inputWrap.selectAll('input')
-	                .data([0]);
-	        } else {
-	            input = container.selectAll('input')
-	                .data([0]);
-	        }
-
-	        input = input.enter()
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('id', field.domId)
-	            .call(utilNoAuto)
-	            .call(initCombo, selection)
-	            .merge(input);
-
-	        if (isNetwork) {
-	            var extent = combinedEntityExtent();
-	            var countryCode = extent && iso1A2Code(extent.center());
-	            _countryCode = countryCode && countryCode.toLowerCase();
-	        }
-
-	        input
-	            .on('change', change)
-	            .on('blur', change);
-
-	        input
-	            .on('keydown.field', function() {
-	                switch (event.keyCode) {
-	                    case 13: // ↩ Return
-	                        input.node().blur(); // blurring also enters the value
-	                        event.stopPropagation();
-	                        break;
-	                }
-	            });
+	    var langItems = [];
+	    langCodes.forEach(function (code) {
+	      var langItem = _languagesArray.find(function (item) {
+	        return item.code === code;
+	      });
 
-	        if (isMulti || isSemi) {
-	            combobox
-	                .on('accept', function() {
-	                    input.node().blur();
-	                    input.node().focus();
-	                });
+	      if (langItem) langItems.push(langItem);
+	    });
+	    langItems = utilArrayUniq(langItems.concat(_languagesArray));
+	    cb(langItems.filter(function (d) {
+	      return d.label.toLowerCase().indexOf(v) >= 0 || d.localName && d.localName.toLowerCase().indexOf(v) >= 0 || d.nativeName && d.nativeName.toLowerCase().indexOf(v) >= 0 || d.code.toLowerCase().indexOf(v) >= 0;
+	    }).map(function (d) {
+	      return {
+	        value: d.label
+	      };
+	    }));
+	  }
 
-	            input
-	                .on('focus', function() { container.classed('active', true); });
+	  function renderMultilingual(selection) {
+	    var entries = selection.selectAll('div.entry').data(_multilingual, function (d) {
+	      return d.lang;
+	    });
+	    entries.exit().style('top', '0').style('max-height', '240px').transition().duration(200).style('opacity', '0').style('max-height', '0px').remove();
+	    var entriesEnter = entries.enter().append('div').attr('class', 'entry').each(function (_, index) {
+	      var wrap = select(this);
+	      var domId = utilUniqueDomId(index);
+	      var label = wrap.append('label').attr('class', 'field-label').attr('for', domId);
+	      var text = label.append('span').attr('class', 'label-text');
+	      text.append('span').attr('class', 'label-textvalue').call(_t.append('translate.localized_translation_label'));
+	      text.append('span').attr('class', 'label-textannotation');
+	      label.append('button').attr('class', 'remove-icon-multilingual').attr('title', _t('icons.remove')).on('click', function (d3_event, d) {
+	        if (field.locked()) return;
+	        d3_event.preventDefault(); // remove the UI item manually
+
+	        _multilingual.splice(_multilingual.indexOf(d), 1);
+
+	        var langKey = d.lang && key(d.lang);
+
+	        if (langKey && langKey in _tags) {
+	          delete _tags[langKey]; // remove from entity tags
+
+	          var t = {};
+	          t[langKey] = undefined;
+	          dispatch.call('change', this, t);
+	          return;
 	        }
-	    }
 
+	        renderMultilingual(selection);
+	      }).call(svgIcon('#iD-operation-delete'));
+	      wrap.append('input').attr('class', 'localized-lang').attr('id', domId).attr('type', 'text').attr('placeholder', _t('translate.localized_translation_language')).on('blur', changeLang).on('change', changeLang).call(langCombo);
+	      wrap.append('input').attr('type', 'text').attr('class', 'localized-value').on('blur', changeValue).on('change', changeValue);
+	    });
+	    entriesEnter.style('margin-top', '0px').style('max-height', '0px').style('opacity', '0').transition().duration(200).style('margin-top', '10px').style('max-height', '240px').style('opacity', '1').on('end', function () {
+	      select(this).style('max-height', '').style('overflow', 'visible');
+	    });
+	    entries = entries.merge(entriesEnter);
+	    entries.order(); // allow removing the entry UIs even if there isn't a tag to remove
 
-	    combo.tags = function(tags) {
-	        _tags = tags;
-
-	        if (isMulti || isSemi) {
-	            _multiData = [];
-
-	            var maxLength;
+	    entries.classed('present', true);
+	    utilGetSetValue(entries.select('.localized-lang'), function (d) {
+	      var langItem = _languagesArray.find(function (item) {
+	        return item.code === d.lang;
+	      });
 
-	            if (isMulti) {
-	                // Build _multiData array containing keys already set..
-	                for (var k in tags) {
-	                    if (k.indexOf(field.key) !== 0) { continue; }
-	                    var v = tags[k];
-	                    if (!v || (typeof v === 'string' && v.toLowerCase() === 'no')) { continue; }
+	      if (langItem) return langItem.label;
+	      return d.lang;
+	    });
+	    utilGetSetValue(entries.select('.localized-value'), function (d) {
+	      return typeof d.value === 'string' ? d.value : '';
+	    }).attr('title', function (d) {
+	      return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : null;
+	    }).attr('placeholder', function (d) {
+	      return Array.isArray(d.value) ? _t('inspector.multiple_values') : _t('translate.localized_translation_name');
+	    }).classed('mixed', function (d) {
+	      return Array.isArray(d.value);
+	    });
+	  }
 
-	                    var suffix = k.substring(field.key.length);
-	                    _multiData.push({
-	                        key: k,
-	                        value: displayValue(suffix),
-	                        isMixed: Array.isArray(v)
-	                    });
-	                }
+	  localized.tags = function (tags) {
+	    _tags = tags; // Fetch translations from wikipedia
 
-	                // Set keys for form-field modified (needed for undo and reset buttons)..
-	                field.keys = _multiData.map(function(d) { return d.key; });
+	    if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
+	      _wikiTitles = {};
+	      var wm = tags.wikipedia.match(/([^:]+):(.+)/);
 
-	                // limit the input length so it fits after prepending the key prefix
-	                maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
+	      if (wm && wm[0] && wm[1]) {
+	        wikipedia.translations(wm[1], wm[2], function (err, d) {
+	          if (err || !d) return;
+	          _wikiTitles = d;
+	        });
+	      }
+	    }
 
-	            } else if (isSemi) {
+	    var isMixed = Array.isArray(tags[field.key]);
+	    utilGetSetValue(input, typeof tags[field.key] === 'string' ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder()).classed('mixed', isMixed);
+	    calcMultilingual(tags);
 
-	                var allValues = [];
-	                var commonValues;
-	                if (Array.isArray(tags[field.key])) {
+	    _selection.call(localized);
+	  };
 
-	                    tags[field.key].forEach(function(tagVal) {
-	                        var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
-	                        allValues = allValues.concat(thisVals);
-	                        if (!commonValues) {
-	                            commonValues = thisVals;
-	                        } else {
-	                            commonValues = commonValues.filter(function (value) { return thisVals.includes(value); });
-	                        }
-	                    });
-	                    allValues = utilArrayUniq(allValues).filter(Boolean);
+	  localized.focus = function () {
+	    input.node().focus();
+	  };
 
-	                } else {
-	                    allValues =  utilArrayUniq((tags[field.key] || '').split(';')).filter(Boolean);
-	                    commonValues = allValues;
-	                }
+	  localized.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _multilingual = [];
+	    loadCountryCode();
+	    return localized;
+	  };
 
-	                _multiData = allValues.map(function(v) {
-	                    return {
-	                        key: v,
-	                        value: displayValue(v),
-	                        isMixed: !commonValues.includes(v)
-	                    };
-	                });
+	  function loadCountryCode() {
+	    var extent = combinedEntityExtent();
+	    var countryCode = extent && iso1A2Code(extent.center());
+	    _countryCode = countryCode && countryCode.toLowerCase();
+	  }
 
-	                var currLength = utilUnicodeCharsCount(commonValues.join(';'));
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	                // limit the input length to the remaining available characters
-	                maxLength = context.maxCharsForTagValue() - currLength;
+	  return utilRebind(localized, dispatch, 'on');
+	}
 
-	                if (currLength > 0) {
-	                    // account for the separator if a new value will be appended to existing
-	                    maxLength -= 1;
-	                }
-	            }
-	            // a negative maxlength doesn't make sense
-	            maxLength = Math.max(0, maxLength);
+	function uiFieldRoadheight(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var primaryUnitInput = select(null);
+	  var primaryInput = select(null);
+	  var secondaryInput = select(null);
+	  var secondaryUnitInput = select(null);
+	  var _entityIDs = [];
 
-	            var allowDragAndDrop = isSemi // only semiCombo values are ordered
-	                && !Array.isArray(tags[field.key]);
+	  var _tags;
 
-	            // Exclude existing multikeys from combo options..
-	            var available = objectDifference(_comboData, _multiData);
-	            combobox.data(available);
+	  var _isImperial;
 
-	            // Hide 'Add' button if this field uses fixed set of
-	            // translateable optstrings and they're all currently used,
-	            // or if the field is already at its character limit
-	            var hideAdd = (optstrings && !available.length) || maxLength <= 0;
-	            container.selectAll('.chiplist .input-wrap')
-	                .style('display', hideAdd ? 'none' : null);
+	  var primaryUnits = [{
+	    value: 'm',
+	    title: _t('inspector.roadheight.meter')
+	  }, {
+	    value: 'ft',
+	    title: _t('inspector.roadheight.foot')
+	  }];
+	  var unitCombo = uiCombobox(context, 'roadheight-unit').data(primaryUnits);
+
+	  function roadheight(selection) {
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    primaryInput = wrap.selectAll('input.roadheight-number').data([0]);
+	    primaryInput = primaryInput.enter().append('input').attr('type', 'text').attr('class', 'roadheight-number').attr('id', field.domId).call(utilNoAuto).merge(primaryInput);
+	    primaryInput.on('change', change).on('blur', change);
+	    var loc = combinedEntityExtent().center();
+	    _isImperial = roadHeightUnit(loc) === 'ft';
+	    primaryUnitInput = wrap.selectAll('input.roadheight-unit').data([0]);
+	    primaryUnitInput = primaryUnitInput.enter().append('input').attr('type', 'text').attr('class', 'roadheight-unit').call(unitCombo).merge(primaryUnitInput);
+	    primaryUnitInput.on('blur', changeUnits).on('change', changeUnits);
+	    secondaryInput = wrap.selectAll('input.roadheight-secondary-number').data([0]);
+	    secondaryInput = secondaryInput.enter().append('input').attr('type', 'text').attr('class', 'roadheight-secondary-number').call(utilNoAuto).merge(secondaryInput);
+	    secondaryInput.on('change', change).on('blur', change);
+	    secondaryUnitInput = wrap.selectAll('input.roadheight-secondary-unit').data([0]);
+	    secondaryUnitInput = secondaryUnitInput.enter().append('input').attr('type', 'text').call(utilNoAuto).classed('disabled', true).classed('roadheight-secondary-unit', true).attr('readonly', 'readonly').merge(secondaryUnitInput);
+
+	    function changeUnits() {
+	      _isImperial = utilGetSetValue(primaryUnitInput) === 'ft';
+	      utilGetSetValue(primaryUnitInput, _isImperial ? 'ft' : 'm');
+	      setUnitSuggestions();
+	      change();
+	    }
+	  }
+
+	  function setUnitSuggestions() {
+	    utilGetSetValue(primaryUnitInput, _isImperial ? 'ft' : 'm');
+	  }
+
+	  function change() {
+	    var tag = {};
+	    var primaryValue = utilGetSetValue(primaryInput).trim();
+	    var secondaryValue = utilGetSetValue(secondaryInput).trim(); // don't override multiple values with blank string
+
+	    if (!primaryValue && !secondaryValue && Array.isArray(_tags[field.key])) return;
+
+	    if (!primaryValue && !secondaryValue) {
+	      tag[field.key] = undefined;
+	    } else if (isNaN(primaryValue) || isNaN(secondaryValue) || !_isImperial) {
+	      tag[field.key] = context.cleanTagValue(primaryValue);
+	    } else {
+	      if (primaryValue !== '') {
+	        primaryValue = context.cleanTagValue(primaryValue + '\'');
+	      }
 
+	      if (secondaryValue !== '') {
+	        secondaryValue = context.cleanTagValue(secondaryValue + '"');
+	      }
 
-	            // Render chips
-	            var chips = container.selectAll('.chip')
-	                .data(_multiData);
+	      tag[field.key] = primaryValue + secondaryValue;
+	    }
 
-	            chips.exit()
-	                .remove();
+	    dispatch.call('change', this, tag);
+	  }
 
-	            var enter = chips.enter()
-	                .insert('li', '.input-wrap')
-	                .attr('class', 'chip');
+	  roadheight.tags = function (tags) {
+	    _tags = tags;
+	    var primaryValue = tags[field.key];
+	    var secondaryValue;
+	    var isMixed = Array.isArray(primaryValue);
 
-	            enter.append('span');
-	            enter.append('a');
+	    if (!isMixed) {
+	      if (primaryValue && (primaryValue.indexOf('\'') >= 0 || primaryValue.indexOf('"') >= 0)) {
+	        secondaryValue = primaryValue.match(/(-?[\d.]+)"/);
 
-	            chips = chips.merge(enter)
-	                .order()
-	                .classed('draggable', allowDragAndDrop)
-	                .classed('mixed', function(d) {
-	                    return d.isMixed;
-	                })
-	                .attr('title', function(d) {
-	                    return d.isMixed ? _t('inspector.unshared_value_tooltip') : null;
-	                });
+	        if (secondaryValue !== null) {
+	          secondaryValue = secondaryValue[1];
+	        }
 
-	            if (allowDragAndDrop) {
-	                registerDragAndDrop(chips);
-	            }
+	        primaryValue = primaryValue.match(/(-?[\d.]+)'/);
 
-	            chips.select('span')
-	                .text(function(d) { return d.value; });
+	        if (primaryValue !== null) {
+	          primaryValue = primaryValue[1];
+	        }
 
-	            chips.select('a')
-	                .on('click', removeMultikey)
-	                .attr('class', 'remove')
-	                .text('×');
+	        _isImperial = true;
+	      } else if (primaryValue) {
+	        _isImperial = false;
+	      }
+	    }
 
-	        } else {
-	            var isMixed = Array.isArray(tags[field.key]);
+	    setUnitSuggestions();
+	    utilGetSetValue(primaryInput, typeof primaryValue === 'string' ? primaryValue : '').attr('title', isMixed ? primaryValue.filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : _t('inspector.unknown')).classed('mixed', isMixed);
+	    utilGetSetValue(secondaryInput, typeof secondaryValue === 'string' ? secondaryValue : '').attr('placeholder', isMixed ? _t('inspector.multiple_values') : _isImperial ? '0' : null).classed('mixed', isMixed).classed('disabled', !_isImperial).attr('readonly', _isImperial ? null : 'readonly');
+	    secondaryUnitInput.attr('value', _isImperial ? _t('inspector.roadheight.inch') : null);
+	  };
 
-	            var mixedValues = isMixed && tags[field.key].map(function(val) {
-	                return displayValue(val);
-	            }).filter(Boolean);
+	  roadheight.focus = function () {
+	    primaryInput.node().focus();
+	  };
 
-	            utilGetSetValue(input, !isMixed ? displayValue(tags[field.key]) : '')
-	                .attr('title', isMixed ? mixedValues.join('\n') : undefined)
-	                .attr('placeholder', isMixed ? _t('inspector.multiple_values') : _staticPlaceholder || '')
-	                .classed('mixed', isMixed);
-	        }
-	    };
+	  roadheight.entityIDs = function (val) {
+	    _entityIDs = val;
+	  };
 
-	    function registerDragAndDrop(selection) {
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	        // allow drag and drop re-ordering of chips
-	        var dragOrigin, targetIndex;
-	        selection.call(d3_drag()
-	            .on('start', function() {
-	                dragOrigin = {
-	                    x: event.x,
-	                    y: event.y
-	                };
-	                targetIndex = null;
-	            })
-	            .on('drag', function(d, index) {
-	                var x = event.x - dragOrigin.x,
-	                    y = event.y - dragOrigin.y;
-
-	                if (!select(this).classed('dragging') &&
-	                    // don't display drag until dragging beyond a distance threshold
-	                    Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) { return; }
-
-	                select(this)
-	                    .classed('dragging', true);
-
-	                targetIndex = null;
-	                var targetIndexOffsetTop = null;
-	                var draggedTagWidth = select(this).node().offsetWidth;
-
-	                if (field.key === 'destination') { // meaning tags are full width
-	                    container.selectAll('.chip')
-	                        .style('transform', function(d2, index2) {
-	                            var node = select(this).node();
-
-	                            if (index === index2) {
-	                                return 'translate(' + x + 'px, ' + y + 'px)';
-	                            // move the dragged tag up the order
-	                            } else if (index2 > index && event.y > node.offsetTop) {
-	                                if (targetIndex === null || index2 > targetIndex) {
-	                                    targetIndex = index2;
-	                                }
-	                                return 'translateY(-100%)';
-	                            // move the dragged tag down the order
-	                            } else if (index2 < index && event.y < node.offsetTop + node.offsetHeight) {
-	                                if (targetIndex === null || index2 < targetIndex) {
-	                                    targetIndex = index2;
-	                                }
-	                                return 'translateY(100%)';
-	                            }
-	                            return null;
-	                        });
-	                } else {
-	                    container.selectAll('.chip')
-	                        .each(function(d2, index2) {
-	                            var node = select(this).node();
-
-	                            // check the cursor is in the bounding box
-	                            if (
-	                                index !== index2 &&
-	                                event.x < node.offsetLeft + node.offsetWidth + 5 &&
-	                                event.x > node.offsetLeft &&
-	                                event.y < node.offsetTop + node.offsetHeight &&
-	                                event.y > node.offsetTop
-	                            ) {
-	                                targetIndex = index2;
-	                                targetIndexOffsetTop = node.offsetTop;
-	                            }
-	                        })
-	                        .style('transform', function(d2, index2) {
-	                            var node = select(this).node();
-
-	                            if (index === index2) {
-	                                return 'translate(' + x + 'px, ' + y + 'px)';
-	                            }
-
-	                            // only translate tags in the same row
-	                            if (node.offsetTop === targetIndexOffsetTop) {
-	                                if (index2 < index && index2 >= targetIndex) {
-	                                    return 'translateX(' + draggedTagWidth + 'px)';
-	                                } else if (index2 > index && index2 <= targetIndex) {
-	                                    return 'translateX(-' + draggedTagWidth + 'px)';
-	                                }
-	                            }
-	                            return null;
-	                        });
-	                    }
-	            })
-	            .on('end', function(d, index) {
-	                if (!select(this).classed('dragging')) {
-	                    return;
-	                }
+	  return utilRebind(roadheight, dispatch, 'on');
+	}
 
-	                select(this)
-	                    .classed('dragging', false);
+	function uiFieldRoadspeed(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var unitInput = select(null);
+	  var input = select(null);
+	  var _entityIDs = [];
 
-	                container.selectAll('.chip')
-	                    .style('transform', null);
+	  var _tags;
 
-	                if (typeof targetIndex === 'number') {
-	                    var element = _multiData[index];
-	                    _multiData.splice(index, 1);
-	                    _multiData.splice(targetIndex, 0, element);
+	  var _isImperial;
 
-	                    var t = {};
+	  var speedCombo = uiCombobox(context, 'roadspeed');
+	  var unitCombo = uiCombobox(context, 'roadspeed-unit').data(['km/h', 'mph'].map(comboValues));
+	  var metricValues = [20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120];
+	  var imperialValues = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80];
 
-	                    if (_multiData.length) {
-	                        t[field.key] = _multiData.map(function(element) {
-	                            return element.key;
-	                        }).join(';');
-	                    } else {
-	                        t[field.key] = undefined;
-	                    }
+	  function roadspeed(selection) {
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    input = wrap.selectAll('input.roadspeed-number').data([0]);
+	    input = input.enter().append('input').attr('type', 'text').attr('class', 'roadspeed-number').attr('id', field.domId).call(utilNoAuto).call(speedCombo).merge(input);
+	    input.on('change', change).on('blur', change);
+	    var loc = combinedEntityExtent().center();
+	    _isImperial = roadSpeedUnit(loc) === 'mph';
+	    unitInput = wrap.selectAll('input.roadspeed-unit').data([0]);
+	    unitInput = unitInput.enter().append('input').attr('type', 'text').attr('class', 'roadspeed-unit').attr('aria-label', _t('inspector.speed_unit')).call(unitCombo).merge(unitInput);
+	    unitInput.on('blur', changeUnits).on('change', changeUnits);
 
-	                    dispatch$1.call('change', this, t);
-	                }
-	                dragOrigin = undefined;
-	                targetIndex = undefined;
-	            })
-	        );
+	    function changeUnits() {
+	      _isImperial = utilGetSetValue(unitInput) === 'mph';
+	      utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+	      setUnitSuggestions();
+	      change();
 	    }
+	  }
 
+	  function setUnitSuggestions() {
+	    speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
+	    utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+	  }
 
-	    combo.focus = function() {
-	        input.node().focus();
+	  function comboValues(d) {
+	    return {
+	      value: d.toString(),
+	      title: d.toString()
 	    };
+	  }
 
+	  function change() {
+	    var tag = {};
+	    var value = utilGetSetValue(input).trim(); // don't override multiple values with blank string
 
-	    combo.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return combo;
-	    };
-
+	    if (!value && Array.isArray(_tags[field.key])) return;
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	    if (!value) {
+	      tag[field.key] = undefined;
+	    } else if (isNaN(value) || !_isImperial) {
+	      tag[field.key] = context.cleanTagValue(value);
+	    } else {
+	      tag[field.key] = context.cleanTagValue(value + ' mph');
 	    }
 
+	    dispatch.call('change', this, tag);
+	  }
 
-	    return utilRebind(combo, dispatch$1, 'on');
-	}
-
-	function uiFieldText(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var input = select(null);
-	    var outlinkButton = select(null);
-	    var _entityIDs = [];
-	    var _tags;
-	    var _phoneFormats = {};
-
-	    if (field.type === 'tel') {
-	        _mainFileFetcher.get('phone_formats')
-	            .then(function(d) {
-	                _phoneFormats = d;
-	                updatePhonePlaceholder();
-	            })
-	            .catch(function() { /* ignore */ });
+	  roadspeed.tags = function (tags) {
+	    _tags = tags;
+	    var value = tags[field.key];
+	    var isMixed = Array.isArray(value);
+
+	    if (!isMixed) {
+	      if (value && value.indexOf('mph') >= 0) {
+	        value = parseInt(value, 10).toString();
+	        _isImperial = true;
+	      } else if (value) {
+	        _isImperial = false;
+	      }
 	    }
 
-	    function i(selection) {
-	        var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
-	        var preset = entity && _mainPresetIndex.match(entity, context.graph());
-	        var isLocked = preset && preset.suggestion && field.id === 'brand';
-	        field.locked(isLocked);
-
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    setUnitSuggestions();
+	    utilGetSetValue(input, typeof value === 'string' ? value : '').attr('title', isMixed ? value.filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder()).classed('mixed', isMixed);
+	  };
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	  roadspeed.focus = function () {
+	    input.node().focus();
+	  };
 
-	        input = wrap.selectAll('input')
-	            .data([0]);
+	  roadspeed.entityIDs = function (val) {
+	    _entityIDs = val;
+	  };
 
-	        input = input.enter()
-	            .append('input')
-	            .attr('type', field.type === 'identifier' ? 'text' : field.type)
-	            .attr('id', field.domId)
-	            .classed(field.type, true)
-	            .call(utilNoAuto)
-	            .merge(input);
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	        input
-	            .classed('disabled', !!isLocked)
-	            .attr('readonly', isLocked || null)
-	            .on('input', change(true))
-	            .on('blur', change())
-	            .on('change', change());
+	  return utilRebind(roadspeed, dispatch, 'on');
+	}
 
+	function uiFieldRadio(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var placeholder = select(null);
+	  var wrap = select(null);
+	  var labels = select(null);
+	  var radios = select(null);
+	  var radioData = (field.options || field.keys).slice(); // shallow copy
+
+	  var typeField;
+	  var layerField;
+	  var _oldType = {};
+	  var _entityIDs = [];
+
+	  function selectedKey() {
+	    var node = wrap.selectAll('.form-field-input-radio label.active input');
+	    return !node.empty() && node.datum();
+	  }
+
+	  function radio(selection) {
+	    selection.classed('preset-radio', true);
+	    wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    var enter = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-radio');
+	    enter.append('span').attr('class', 'placeholder');
+	    wrap = wrap.merge(enter);
+	    placeholder = wrap.selectAll('.placeholder');
+	    labels = wrap.selectAll('label').data(radioData);
+	    enter = labels.enter().append('label');
+	    enter.append('input').attr('type', 'radio').attr('name', field.id).attr('value', function (d) {
+	      return field.t('options.' + d, {
+	        'default': d
+	      });
+	    }).attr('checked', false);
+	    enter.append('span').html(function (d) {
+	      return field.t.html('options.' + d, {
+	        'default': d
+	      });
+	    });
+	    labels = labels.merge(enter);
+	    radios = labels.selectAll('input').on('change', changeRadio);
+	  }
+
+	  function structureExtras(selection, tags) {
+	    var selected = selectedKey() || tags.layer !== undefined;
+	    var type = _mainPresetIndex.field(selected);
+	    var layer = _mainPresetIndex.field('layer');
+	    var showLayer = selected === 'bridge' || selected === 'tunnel' || tags.layer !== undefined;
+	    var extrasWrap = selection.selectAll('.structure-extras-wrap').data(selected ? [0] : []);
+	    extrasWrap.exit().remove();
+	    extrasWrap = extrasWrap.enter().append('div').attr('class', 'structure-extras-wrap').merge(extrasWrap);
+	    var list = extrasWrap.selectAll('ul').data([0]);
+	    list = list.enter().append('ul').attr('class', 'rows').merge(list); // Type
+
+	    if (type) {
+	      if (!typeField || typeField.id !== selected) {
+	        typeField = uiField(context, type, _entityIDs, {
+	          wrap: false
+	        }).on('change', changeType);
+	      }
 
-	        if (field.type === 'tel') {
-	            updatePhonePlaceholder();
+	      typeField.tags(tags);
+	    } else {
+	      typeField = null;
+	    }
 
-	        } else if (field.type === 'number') {
-	            var rtl = (_mainLocalizer.textDirection() === 'rtl');
+	    var typeItem = list.selectAll('.structure-type-item').data(typeField ? [typeField] : [], function (d) {
+	      return d.id;
+	    }); // Exit
 
-	            input.attr('type', 'text');
+	    typeItem.exit().remove(); // Enter
 
-	            var buttons = wrap.selectAll('.increment, .decrement')
-	                .data(rtl ? [1, -1] : [-1, 1]);
+	    var typeEnter = typeItem.enter().insert('li', ':first-child').attr('class', 'labeled-input structure-type-item');
+	    typeEnter.append('span').attr('class', 'label structure-label-type').attr('for', 'preset-input-' + selected).call(_t.append('inspector.radio.structure.type'));
+	    typeEnter.append('div').attr('class', 'structure-input-type-wrap'); // Update
 
-	            buttons.enter()
-	                .append('button')
-	                .attr('tabindex', -1)
-	                .attr('class', function(d) {
-	                    var which = (d === 1 ? 'increment' : 'decrement');
-	                    return 'form-field-button ' + which;
-	                })
-	                .merge(buttons)
-	                .on('click', function(d) {
-	                    event.preventDefault();
-	                    var raw_vals = input.node().value || '0';
-	                    var vals = raw_vals.split(';');
-	                    vals = vals.map(function(v) {
-	                        var num = parseFloat(v.trim(), 10);
-	                        return isFinite(num) ? clamped(num + d) : v.trim();
-	                    });
-	                    input.node().value = vals.join(';');
-	                    change()();
-	                });
-	        } else if (field.type === 'identifier' && field.urlFormat && field.pattern) {
+	    typeItem = typeItem.merge(typeEnter);
 
-	            input.attr('type', 'text');
+	    if (typeField) {
+	      typeItem.selectAll('.structure-input-type-wrap').call(typeField.render);
+	    } // Layer
 
-	            outlinkButton = wrap.selectAll('.foreign-id-permalink')
-	                .data([0]);
 
-	            outlinkButton.enter()
-	                .append('button')
-	                .attr('tabindex', -1)
-	                .call(svgIcon('#iD-icon-out-link'))
-	                .attr('class', 'form-field-button foreign-id-permalink')
-	                .attr('title', function() {
-	                    var domainResults = /^https?:\/\/(.{1,}?)\//.exec(field.urlFormat);
-	                    if (domainResults.length >= 2 && domainResults[1]) {
-	                        var domain = domainResults[1];
-	                        return _t('icons.view_on', { domain: domain });
-	                    }
-	                    return '';
-	                })
-	                .on('click', function() {
-	                    event.preventDefault();
+	    if (layer && showLayer) {
+	      if (!layerField) {
+	        layerField = uiField(context, layer, _entityIDs, {
+	          wrap: false
+	        }).on('change', changeLayer);
+	      }
 
-	                    var value = validIdentifierValueForLink();
-	                    if (value) {
-	                        var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
-	                        window.open(url, '_blank');
-	                    }
-	                })
-	                .merge(outlinkButton);
-	        }
+	      layerField.tags(tags);
+	      field.keys = utilArrayUnion(field.keys, ['layer']);
+	    } else {
+	      layerField = null;
+	      field.keys = field.keys.filter(function (k) {
+	        return k !== 'layer';
+	      });
 	    }
 
+	    var layerItem = list.selectAll('.structure-layer-item').data(layerField ? [layerField] : []); // Exit
 
-	    function updatePhonePlaceholder() {
-	        if (input.empty() || !Object.keys(_phoneFormats).length) { return; }
-
-	        var extent = combinedEntityExtent();
-	        var countryCode = extent && iso1A2Code(extent.center());
-	        var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
-	        if (format) { input.attr('placeholder', format); }
-	    }
-
+	    layerItem.exit().remove(); // Enter
 
-	    function validIdentifierValueForLink() {
-	        if (field.type === 'identifier' && field.pattern) {
-	            var value = utilGetSetValue(input).trim().split(';')[0];
-	            return value && value.match(new RegExp(field.pattern));
-	        }
-	        return null;
-	    }
+	    var layerEnter = layerItem.enter().append('li').attr('class', 'labeled-input structure-layer-item');
+	    layerEnter.append('span').attr('class', 'label structure-label-layer').attr('for', 'preset-input-layer').call(_t.append('inspector.radio.structure.layer'));
+	    layerEnter.append('div').attr('class', 'structure-input-layer-wrap'); // Update
 
+	    layerItem = layerItem.merge(layerEnter);
 
-	    // clamp number to min/max
-	    function clamped(num) {
-	        if (field.minValue !== undefined) {
-	            num = Math.max(num, field.minValue);
-	        }
-	        if (field.maxValue !== undefined) {
-	            num = Math.min(num, field.maxValue);
-	        }
-	        return num;
+	    if (layerField) {
+	      layerItem.selectAll('.structure-input-layer-wrap').call(layerField.render);
 	    }
+	  }
 
+	  function changeType(t, onInput) {
+	    var key = selectedKey();
+	    if (!key) return;
+	    var val = t[key];
 
-	    function change(onInput) {
-	        return function() {
-	            var t = {};
-	            var val = utilGetSetValue(input);
-	            if (!onInput) { val = context.cleanTagValue(val); }
-
-	            // don't override multiple values with blank string
-	            if (!val && Array.isArray(_tags[field.key])) { return; }
-
-	            if (!onInput) {
-	                if (field.type === 'number' && val) {
-	                    var vals = val.split(';');
-	                    vals = vals.map(function(v) {
-	                        var num = parseFloat(v.trim(), 10);
-	                        return isFinite(num) ? clamped(num) : v.trim();
-	                    });
-	                    val = vals.join(';');
-	                }
-	                utilGetSetValue(input, val);
-	            }
-	            t[field.key] = val || undefined;
-	            dispatch$1.call('change', this, t, onInput);
-	        };
+	    if (val !== 'no') {
+	      _oldType[key] = val;
 	    }
 
+	    if (field.type === 'structureRadio') {
+	      // remove layer if it should not be set
+	      if (val === 'no' || key !== 'bridge' && key !== 'tunnel' || key === 'tunnel' && val === 'building_passage') {
+	        t.layer = undefined;
+	      } // add layer if it should be set
 
-	    i.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return i;
-	    };
-
-
-	    i.tags = function(tags) {
-	        _tags = tags;
 
-	        var isMixed = Array.isArray(tags[field.key]);
-
-	        utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '')
-	            .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined)
-	            .attr('placeholder', isMixed ? _t('inspector.multiple_values') : (field.placeholder() || _t('inspector.unknown')))
-	            .classed('mixed', isMixed);
-
-	        if (outlinkButton && !outlinkButton.empty()) {
-	            var disabled = !validIdentifierValueForLink();
-	            outlinkButton.classed('disabled', disabled);
+	      if (t.layer === undefined) {
+	        if (key === 'bridge' && val !== 'no') {
+	          t.layer = '1';
 	        }
-	    };
 
+	        if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
+	          t.layer = '-1';
+	        }
+	      }
+	    }
 
-	    i.focus = function() {
-	        var node = input.node();
-	        if (node) { node.focus(); }
-	    };
+	    dispatch.call('change', this, t, onInput);
+	  }
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  function changeLayer(t, onInput) {
+	    if (t.layer === '0') {
+	      t.layer = undefined;
 	    }
 
-	    return utilRebind(i, dispatch$1, 'on');
-	}
+	    dispatch.call('change', this, t, onInput);
+	  }
 
-	function uiFieldAccess(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var items = select(null);
-	    var _tags;
+	  function changeRadio() {
+	    var t = {};
+	    var activeKey;
 
-	    function access(selection) {
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    if (field.key) {
+	      t[field.key] = undefined;
+	    }
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	    radios.each(function (d) {
+	      var active = select(this).property('checked');
+	      if (active) activeKey = d;
 
-	        var list = wrap.selectAll('ul')
-	            .data([0]);
+	      if (field.key) {
+	        if (active) t[field.key] = d;
+	      } else {
+	        var val = _oldType[activeKey] || 'yes';
+	        t[d] = active ? val : undefined;
+	      }
+	    });
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'rows')
-	            .merge(list);
+	    if (field.type === 'structureRadio') {
+	      if (activeKey === 'bridge') {
+	        t.layer = '1';
+	      } else if (activeKey === 'tunnel' && t.tunnel !== 'building_passage') {
+	        t.layer = '-1';
+	      } else {
+	        t.layer = undefined;
+	      }
+	    }
 
+	    dispatch.call('change', this, t);
+	  }
 
-	        items = list.selectAll('li')
-	            .data(field.keys);
+	  radio.tags = function (tags) {
+	    function isOptionChecked(d) {
+	      if (field.key) {
+	        return tags[field.key] === d;
+	      }
 
-	        // Enter
-	        var enter = items.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'labeled-input preset-access-' + d; });
+	      return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
+	    }
 
-	        enter
-	            .append('span')
-	            .attr('class', 'label preset-label-access')
-	            .attr('for', function(d) { return 'preset-input-access-' + d; })
-	            .text(function(d) { return field.t('types.' + d); });
+	    function isMixed(d) {
+	      if (field.key) {
+	        return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
+	      }
 
-	        enter
-	            .append('div')
-	            .attr('class', 'preset-input-access-wrap')
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', function(d) { return 'preset-input-access preset-input-access-' + d; })
-	            .call(utilNoAuto)
-	            .each(function(d) {
-	                select(this)
-	                    .call(uiCombobox(context, 'access-' + d)
-	                        .data(access.options(d))
-	                    );
-	            });
+	      return Array.isArray(tags[d]);
+	    }
 
+	    radios.property('checked', function (d) {
+	      return isOptionChecked(d) && (field.key || field.options.filter(isOptionChecked).length === 1);
+	    });
+	    labels.classed('active', function (d) {
+	      if (field.key) {
+	        return Array.isArray(tags[field.key]) && tags[field.key].includes(d) || tags[field.key] === d;
+	      }
 
-	        // Update
-	        items = items.merge(enter);
+	      return Array.isArray(tags[d]) && tags[d].some(function (v) {
+	        return typeof v === 'string' && v.toLowerCase() !== 'no';
+	      }) || !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
+	    }).classed('mixed', isMixed).attr('title', function (d) {
+	      return isMixed(d) ? _t('inspector.unshared_value_tooltip') : null;
+	    });
+	    var selection = radios.filter(function () {
+	      return this.checked;
+	    });
 
-	        wrap.selectAll('.preset-input-access')
-	            .on('change', change)
-	            .on('blur', change);
+	    if (selection.empty()) {
+	      placeholder.call(_t.append('inspector.none'));
+	    } else {
+	      placeholder.text(selection.attr('value'));
+	      _oldType[selection.datum()] = tags[selection.datum()];
 	    }
 
+	    if (field.type === 'structureRadio') {
+	      // For waterways without a tunnel tag, set 'culvert' as
+	      // the _oldType to default to if the user picks 'tunnel'
+	      if (!!tags.waterway && !_oldType.tunnel) {
+	        _oldType.tunnel = 'culvert';
+	      }
 
-	    function change(d) {
-	        var tag = {};
-	        var value = context.cleanTagValue(utilGetSetValue(select(this)));
-
-	        // don't override multiple values with blank string
-	        if (!value && typeof _tags[d] !== 'string') { return; }
-
-	        tag[d] = value || undefined;
-	        dispatch$1.call('change', this, tag);
+	      wrap.call(structureExtras, tags);
 	    }
+	  };
 
+	  radio.focus = function () {
+	    radios.node().focus();
+	  };
 
-	    access.options = function(type) {
-	        var options = ['no', 'permissive', 'private', 'permit', 'destination'];
+	  radio.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _oldType = {};
+	    return radio;
+	  };
 
-	        if (type !== 'access') {
-	            options.unshift('yes');
-	            options.push('designated');
+	  radio.isAllowed = function () {
+	    return _entityIDs.length === 1;
+	  };
 
-	            if (type === 'bicycle') {
-	                options.push('dismount');
-	            }
-	        }
+	  return utilRebind(radio, dispatch, 'on');
+	}
 
-	        return options.map(function(option) {
-	            return {
-	                title: field.t('options.' + option + '.description'),
-	                value: option
-	            };
-	        });
-	    };
+	function uiFieldRestrictions(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var breathe = behaviorBreathe();
+	  corePreferences('turn-restriction-via-way', null); // remove old key
 
+	  var storedViaWay = corePreferences('turn-restriction-via-way0'); // use new key #6922
 
-	    var placeholdersByHighway = {
-	        footway: {
-	            foot: 'designated',
-	            motor_vehicle: 'no'
-	        },
-	        steps: {
-	            foot: 'yes',
-	            motor_vehicle: 'no',
-	            bicycle: 'no',
-	            horse: 'no'
-	        },
-	        pedestrian: {
-	            foot: 'yes',
-	            motor_vehicle: 'no'
-	        },
-	        cycleway: {
-	            motor_vehicle: 'no',
-	            bicycle: 'designated'
-	        },
-	        bridleway: {
-	            motor_vehicle: 'no',
-	            horse: 'designated'
-	        },
-	        path: {
-	            foot: 'yes',
-	            motor_vehicle: 'no',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        motorway: {
-	            foot: 'no',
-	            motor_vehicle: 'yes',
-	            bicycle: 'no',
-	            horse: 'no'
-	        },
-	        trunk: {
-	            motor_vehicle: 'yes'
-	        },
-	        primary: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        secondary: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        tertiary: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        residential: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        unclassified: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        service: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        motorway_link: {
-	            foot: 'no',
-	            motor_vehicle: 'yes',
-	            bicycle: 'no',
-	            horse: 'no'
-	        },
-	        trunk_link: {
-	            motor_vehicle: 'yes'
-	        },
-	        primary_link: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        secondary_link: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        tertiary_link: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        }
-	    };
+	  var storedDistance = corePreferences('turn-restriction-distance');
 
+	  var _maxViaWay = storedViaWay !== null ? +storedViaWay : 0;
 
-	    access.tags = function(tags) {
-	        _tags = tags;
-
-	        utilGetSetValue(items.selectAll('.preset-input-access'), function(d) {
-	                return typeof tags[d] === 'string' ? tags[d] : '';
-	            })
-	            .classed('mixed', function(d) {
-	                return tags[d] && Array.isArray(tags[d]);
-	            })
-	            .attr('title', function(d) {
-	                return tags[d] && Array.isArray(tags[d]) && tags[d].filter(Boolean).join('\n');
-	            })
-	            .attr('placeholder', function(d) {
-	                if (tags[d] && Array.isArray(tags[d])) {
-	                    return _t('inspector.multiple_values');
-	                }
-	                if (d === 'access') {
-	                    return 'yes';
-	                }
-	                if (tags.access && typeof tags.access === 'string') {
-	                    return tags.access;
-	                }
-	                if (tags.highway) {
-	                    if (typeof tags.highway === 'string') {
-	                        if (placeholdersByHighway[tags.highway] &&
-	                            placeholdersByHighway[tags.highway][d]) {
+	  var _maxDistance = storedDistance ? +storedDistance : 30;
 
-	                            return placeholdersByHighway[tags.highway][d];
-	                        }
-	                    } else {
-	                        var impliedAccesses = tags.highway.filter(Boolean).map(function(highwayVal) {
-	                            return placeholdersByHighway[highwayVal] && placeholdersByHighway[highwayVal][d];
-	                        }).filter(Boolean);
-
-	                        if (impliedAccesses.length === tags.highway.length &&
-	                            new Set(impliedAccesses).size === 1) {
-	                            // if all the highway values have the same implied access for this type then use that
-	                            return impliedAccesses[0];
-	                        }
-	                    }
-	                }
-	                return field.placeholder();
-	            });
-	    };
+	  var _initialized = false;
 
+	  var _parent = select(null); // the entire field
 
-	    access.focus = function() {
-	        items.selectAll('.preset-input-access')
-	            .node().focus();
-	    };
 
+	  var _container = select(null); // just the map
 
-	    return utilRebind(access, dispatch$1, 'on');
-	}
 
-	function uiFieldAddress(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var _selection = select(null);
-	    var _wrap = select(null);
-	    var addrField = _mainPresetIndex.field('address');   // needed for placeholder strings
-
-	    var _entityIDs = [];
-	    var _tags;
-	    var _countryCode;
-	    var _addressFormats = [{
-	        format: [
-	            ['housenumber', 'street'],
-	            ['city', 'postcode']
-	        ]
-	      }];
+	  var _oldTurns;
 
-	    _mainFileFetcher.get('address_formats')
-	        .then(function(d) {
-	            _addressFormats = d;
-	            if (!_selection.empty()) {
-	                _selection.call(address);
-	            }
-	        })
-	        .catch(function() { /* ignore */ });
-
-
-	    function getNearStreets() {
-	        var extent = combinedEntityExtent();
-	        var l = extent.center();
-	        var box = geoExtent(l).padByMeters(200);
-
-	        var streets = context.history().intersects(box)
-	            .filter(isAddressable)
-	            .map(function(d) {
-	                var loc = context.projection([
-	                    (extent[0][0] + extent[1][0]) / 2,
-	                    (extent[0][1] + extent[1][1]) / 2
-	                ]);
-	                var choice = geoChooseEdge(context.graph().childNodes(d), loc, context.projection);
-
-	                return {
-	                    title: d.tags.name,
-	                    value: d.tags.name,
-	                    dist: choice.distance
-	                };
-	            })
-	            .sort(function(a, b) {
-	                return a.dist - b.dist;
-	            });
+	  var _graph;
 
-	        return utilArrayUniqBy(streets, 'value');
+	  var _vertexID;
 
-	        function isAddressable(d) {
-	            return d.tags.highway && d.tags.name && d.type === 'way';
-	        }
-	    }
+	  var _intersection;
 
+	  var _fromWayID;
 
-	    function getNearCities() {
-	        var extent = combinedEntityExtent();
-	        var l = extent.center();
-	        var box = geoExtent(l).padByMeters(200);
+	  var _lastXPos;
 
-	        var cities = context.history().intersects(box)
-	            .filter(isAddressable)
-	            .map(function(d) {
-	                return {
-	                    title: d.tags['addr:city'] || d.tags.name,
-	                    value: d.tags['addr:city'] || d.tags.name,
-	                    dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
-	                };
-	            })
-	            .sort(function(a, b) {
-	                return a.dist - b.dist;
-	            });
+	  function restrictions(selection) {
+	    _parent = selection; // try to reuse the intersection, but always rebuild it if the graph has changed
 
-	        return utilArrayUniqBy(cities, 'value');
+	    if (_vertexID && (context.graph() !== _graph || !_intersection)) {
+	      _graph = context.graph();
+	      _intersection = osmIntersection(_graph, _vertexID, _maxDistance);
+	    } // It's possible for there to be no actual intersection here.
+	    // for example, a vertex of two `highway=path`
+	    // In this case, hide the field.
 
 
-	        function isAddressable(d) {
-	            if (d.tags.name) {
-	                if (d.tags.admin_level === '8' && d.tags.boundary === 'administrative')
-	                    { return true; }
-	                if (d.tags.border_type === 'city')
-	                    { return true; }
-	                if (d.tags.place === 'city' || d.tags.place === 'town' || d.tags.place === 'village')
-	                    { return true; }
-	            }
+	    var isOK = _intersection && _intersection.vertices.length && // has vertices
+	    _intersection.vertices // has the vertex that the user selected
+	    .filter(function (vertex) {
+	      return vertex.id === _vertexID;
+	    }).length && _intersection.ways.length > 2 && // has more than 2 ways
+	    _intersection.ways // has more than 1 TO way
+	    .filter(function (way) {
+	      return way.__to;
+	    }).length > 1; // Also hide in the case where
 
-	            if (d.tags['addr:city'])
-	                { return true; }
+	    select(selection.node().parentNode).classed('hide', !isOK); // if form field is hidden or has detached from dom, clean up.
 
-	            return false;
-	        }
+	    if (!isOK || !context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode || !selection.node().parentNode.parentNode) {
+	      selection.call(restrictions.off);
+	      return;
 	    }
 
-	    function getNearValues(key) {
-	        var extent = combinedEntityExtent();
-	        var l = extent.center();
-	        var box = geoExtent(l).padByMeters(200);
-
-	        var results = context.history().intersects(box)
-	            .filter(function hasTag(d) { return _entityIDs.indexOf(d.id) === -1 && d.tags[key]; })
-	            .map(function(d) {
-	                return {
-	                    title: d.tags[key],
-	                    value: d.tags[key],
-	                    dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
-	                };
-	            })
-	            .sort(function(a, b) {
-	                return a.dist - b.dist;
-	            });
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    var container = wrap.selectAll('.restriction-container').data([0]); // enter
 
-	        return utilArrayUniqBy(results, 'value');
-	    }
+	    var containerEnter = container.enter().append('div').attr('class', 'restriction-container');
+	    containerEnter.append('div').attr('class', 'restriction-help'); // update
 
+	    _container = containerEnter.merge(container).call(renderViewer);
+	    var controls = wrap.selectAll('.restriction-controls').data([0]); // enter/update
 
-	    function updateForCountryCode() {
+	    controls.enter().append('div').attr('class', 'restriction-controls-container').append('div').attr('class', 'restriction-controls').merge(controls).call(renderControls);
+	  }
 
-	        if (!_countryCode) { return; }
+	  function renderControls(selection) {
+	    var distControl = selection.selectAll('.restriction-distance').data([0]);
+	    distControl.exit().remove();
+	    var distControlEnter = distControl.enter().append('div').attr('class', 'restriction-control restriction-distance');
+	    distControlEnter.append('span').attr('class', 'restriction-control-label restriction-distance-label').call(_t.append('restriction.controls.distance', {
+	      suffix: ':'
+	    }));
+	    distControlEnter.append('input').attr('class', 'restriction-distance-input').attr('type', 'range').attr('min', '20').attr('max', '50').attr('step', '5');
+	    distControlEnter.append('span').attr('class', 'restriction-distance-text'); // update
 
-	        var addressFormat;
-	        for (var i = 0; i < _addressFormats.length; i++) {
-	            var format = _addressFormats[i];
-	            if (!format.countryCodes) {
-	                addressFormat = format;   // choose the default format, keep going
-	            } else if (format.countryCodes.indexOf(_countryCode) !== -1) {
-	                addressFormat = format;   // choose the country format, stop here
-	                break;
-	            }
-	        }
+	    selection.selectAll('.restriction-distance-input').property('value', _maxDistance).on('input', function () {
+	      var val = select(this).property('value');
+	      _maxDistance = +val;
+	      _intersection = null;
 
-	        var dropdowns = addressFormat.dropdowns || [
-	            'city', 'county', 'country', 'district', 'hamlet',
-	            'neighbourhood', 'place', 'postcode', 'province',
-	            'quarter', 'state', 'street', 'subdistrict', 'suburb'
-	        ];
+	      _container.selectAll('.layer-osm .layer-turns *').remove();
 
-	        var widths = addressFormat.widths || {
-	            housenumber: 1/3, street: 2/3,
-	            city: 2/3, state: 1/4, postcode: 1/3
-	        };
+	      corePreferences('turn-restriction-distance', _maxDistance);
 
-	        function row(r) {
-	            // Normalize widths.
-	            var total = r.reduce(function(sum, key) {
-	                return sum + (widths[key] || 0.5);
-	            }, 0);
+	      _parent.call(restrictions);
+	    });
+	    selection.selectAll('.restriction-distance-text').call(displayMaxDistance(_maxDistance));
+	    var viaControl = selection.selectAll('.restriction-via-way').data([0]);
+	    viaControl.exit().remove();
+	    var viaControlEnter = viaControl.enter().append('div').attr('class', 'restriction-control restriction-via-way');
+	    viaControlEnter.append('span').attr('class', 'restriction-control-label restriction-via-way-label').call(_t.append('restriction.controls.via', {
+	      suffix: ':'
+	    }));
+	    viaControlEnter.append('input').attr('class', 'restriction-via-way-input').attr('type', 'range').attr('min', '0').attr('max', '2').attr('step', '1');
+	    viaControlEnter.append('span').attr('class', 'restriction-via-way-text'); // update
 
-	            return r.map(function(key) {
-	                return {
-	                    id: key,
-	                    width: (widths[key] || 0.5) / total
-	                };
-	            });
-	        }
+	    selection.selectAll('.restriction-via-way-input').property('value', _maxViaWay).on('input', function () {
+	      var val = select(this).property('value');
+	      _maxViaWay = +val;
 
-	        var rows = _wrap.selectAll('.addr-row')
-	            .data(addressFormat.format, function(d) {
-	                return d.toString();
-	            });
+	      _container.selectAll('.layer-osm .layer-turns *').remove();
 
-	        rows.exit()
-	            .remove();
+	      corePreferences('turn-restriction-via-way0', _maxViaWay);
 
-	        rows
-	            .enter()
-	            .append('div')
-	            .attr('class', 'addr-row')
-	            .selectAll('input')
-	            .data(row)
-	            .enter()
-	            .append('input')
-	            .property('type', 'text')
-	            .call(updatePlaceholder)
-	            .attr('class', function (d) { return 'addr-' + d.id; })
-	            .call(utilNoAuto)
-	            .each(addDropdown)
-	            .style('width', function (d) { return d.width * 100 + '%'; });
-
-
-	        function addDropdown(d) {
-	            if (dropdowns.indexOf(d.id) === -1) { return; }  // not a dropdown
-
-	            var nearValues = (d.id === 'street') ? getNearStreets
-	                : (d.id === 'city') ? getNearCities
-	                : getNearValues;
-
-	            select(this)
-	                .call(uiCombobox(context, 'address-' + d.id)
-	                    .minItems(1)
-	                    .caseSensitive(true)
-	                    .fetcher(function(value, callback) {
-	                        callback(nearValues('addr:' + d.id));
-	                    })
-	                );
-	        }
+	      _parent.call(restrictions);
+	    });
+	    selection.selectAll('.restriction-via-way-text').call(displayMaxVia(_maxViaWay));
+	  }
+
+	  function renderViewer(selection) {
+	    if (!_intersection) return;
+	    var vgraph = _intersection.graph;
+	    var filter = utilFunctor(true);
+	    var projection = geoRawMercator(); // Reflow warning: `utilGetDimensions` calls `getBoundingClientRect`
+	    // Instead of asking the restriction-container for its dimensions,
+	    //  we can ask the .sidebar, which can have its dimensions cached.
+	    // width: calc as sidebar - padding
+	    // height: hardcoded (from `80_app.css`)
+	    // var d = utilGetDimensions(selection);
+
+	    var sdims = utilGetDimensions(context.container().select('.sidebar'));
+	    var d = [sdims[0] - 50, 370];
+	    var c = geoVecScale(d, 0.5);
+	    var z = 22;
+	    projection.scale(geoZoomToScale(z)); // Calculate extent of all key vertices
 
-	        _wrap.selectAll('input')
-	            .on('blur', change())
-	            .on('change', change());
+	    var extent = geoExtent();
 
-	        _wrap.selectAll('input:not(.combobox-input)')
-	            .on('input', change(true));
+	    for (var i = 0; i < _intersection.vertices.length; i++) {
+	      extent._extend(_intersection.vertices[i].extent());
+	    }
+
+	    var padTop = 35; // reserve top space for hint text
+	    // If this is a large intersection, adjust zoom to fit extent
+
+	    if (_intersection.vertices.length > 1) {
+	      var hPadding = Math.min(160, Math.max(110, d[0] * 0.4));
+	      var vPadding = 160;
+	      var tl = projection([extent[0][0], extent[1][1]]);
+	      var br = projection([extent[1][0], extent[0][1]]);
+	      var hFactor = (br[0] - tl[0]) / (d[0] - hPadding);
+	      var vFactor = (br[1] - tl[1]) / (d[1] - vPadding - padTop);
+	      var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
+	      var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
+	      z = z - Math.max(hZoomDiff, vZoomDiff);
+	      projection.scale(geoZoomToScale(z));
+	    }
+
+	    var extentCenter = projection(extent.center());
+	    extentCenter[1] = extentCenter[1] - padTop / 2;
+	    projection.translate(geoVecSubtract(c, extentCenter)).clipExtent([[0, 0], d]);
+	    var drawLayers = svgLayers(projection, context).only(['osm', 'touch']).dimensions(d);
+	    var drawVertices = svgVertices(projection, context);
+	    var drawLines = svgLines(projection, context);
+	    var drawTurns = svgTurns(projection, context);
+	    var firstTime = selection.selectAll('.surface').empty();
+	    selection.call(drawLayers);
+	    var surface = selection.selectAll('.surface').classed('tr', true);
+
+	    if (firstTime) {
+	      _initialized = true;
+	      surface.call(breathe);
+	    } // This can happen if we've lowered the detail while a FROM way
+	    // is selected, and that way is no longer part of the intersection.
+
+
+	    if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
+	      _fromWayID = null;
+	      _oldTurns = null;
+	    }
+
+	    surface.call(utilSetDimensions, d).call(drawVertices, vgraph, _intersection.vertices, filter, extent, z).call(drawLines, vgraph, _intersection.ways, filter).call(drawTurns, vgraph, _intersection.turns(_fromWayID, _maxViaWay));
+	    surface.on('click.restrictions', click).on('mouseover.restrictions', mouseover);
+	    surface.selectAll('.selected').classed('selected', false);
+	    surface.selectAll('.related').classed('related', false);
+	    var way;
 
-	        if (_tags) { updateTags(_tags); }
+	    if (_fromWayID) {
+	      way = vgraph.entity(_fromWayID);
+	      surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
 	    }
 
+	    document.addEventListener('resizeWindow', function () {
+	      utilSetDimensions(_container, null);
+	      redraw(1);
+	    }, false);
+	    updateHints(null);
 
-	    function address(selection) {
-	        _selection = selection;
+	    function click(d3_event) {
+	      surface.call(breathe.off).call(breathe);
+	      var datum = d3_event.target.__data__;
+	      var entity = datum && datum.properties && datum.properties.entity;
 
-	        _wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	      if (entity) {
+	        datum = entity;
+	      }
 
-	        _wrap = _wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(_wrap);
+	      if (datum instanceof osmWay && (datum.__from || datum.__via)) {
+	        _fromWayID = datum.id;
+	        _oldTurns = null;
+	        redraw();
+	      } else if (datum instanceof osmTurn) {
+	        var actions, extraActions, turns, i;
+	        var restrictionType = osmInferRestriction(vgraph, datum, projection);
 
-	        var extent = combinedEntityExtent();
+	        if (datum.restrictionID && !datum.direct) {
+	          return;
+	        } else if (datum.restrictionID && !datum.only) {
+	          // NO -> ONLY
+	          var seen = {};
+	          var datumOnly = JSON.parse(JSON.stringify(datum)); // deep clone the datum
 
-	        if (extent) {
-	            var countryCode;
-	            if (context.inIntro()) {
-	                // localize the address format for the walkthrough
-	                countryCode = _t('intro.graph.countrycode');
-	            } else {
-	                var center = extent.center();
-	                countryCode = iso1A2Code(center);
-	            }
-	            if (countryCode) {
-	                _countryCode = countryCode.toLowerCase();
-	                updateForCountryCode();
-	            }
-	        }
-	    }
+	          datumOnly.only = true; // but change this property
 
+	          restrictionType = restrictionType.replace(/^no/, 'only'); // Adding an ONLY restriction should destroy all other direct restrictions from the FROM towards the VIA.
+	          // We will remember them in _oldTurns, and restore them if the user clicks again.
 
-	    function change(onInput) {
-	        return function() {
-	            var tags = {};
+	          turns = _intersection.turns(_fromWayID, 2);
+	          extraActions = [];
+	          _oldTurns = [];
 
-	            _wrap.selectAll('input')
-	                .each(function (subfield) {
-	                    var key = field.key + ':' + subfield.id;
+	          for (i = 0; i < turns.length; i++) {
+	            var turn = turns[i];
+	            if (seen[turn.restrictionID]) continue; // avoid deleting the turn twice (#4968, #4928)
 
-	                    var value = this.value;
-	                    if (!onInput) { value = context.cleanTagValue(value); }
+	            if (turn.direct && turn.path[1] === datum.path[1]) {
+	              seen[turns[i].restrictionID] = true;
+	              turn.restrictionType = osmInferRestriction(vgraph, turn, projection);
 
-	                    // don't override multiple values with blank string
-	                    if (Array.isArray(_tags[key]) && !value) { return; }
+	              _oldTurns.push(turn);
 
-	                    tags[key] = value || undefined;
-	                });
+	              extraActions.push(actionUnrestrictTurn(turn));
+	            }
+	          }
 
-	            dispatch$1.call('change', this, tags, onInput);
-	        };
-	    }
+	          actions = _intersection.actions.concat(extraActions, [actionRestrictTurn(datumOnly, restrictionType), _t('operations.restriction.annotation.create')]);
+	        } else if (datum.restrictionID) {
+	          // ONLY -> Allowed
+	          // Restore whatever restrictions we might have destroyed by cycling thru the ONLY state.
+	          // This relies on the assumption that the intersection was already split up when we
+	          // performed the previous action (NO -> ONLY), so the IDs in _oldTurns shouldn't have changed.
+	          turns = _oldTurns || [];
+	          extraActions = [];
 
-	    function updatePlaceholder(inputSelection) {
-	        return inputSelection.attr('placeholder', function(subfield) {
-	            if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
-	                return _t('inspector.multiple_values');
+	          for (i = 0; i < turns.length; i++) {
+	            if (turns[i].key !== datum.key) {
+	              extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
 	            }
-	            if (_countryCode) {
-	                var localkey = subfield.id + '!' + _countryCode;
-	                var tkey = addrField.strings.placeholders[localkey] ? localkey : subfield.id;
-	                return addrField.t('placeholders.' + tkey);
-	            }
-	        });
-	    }
-
+	          }
 
-	    function updateTags(tags) {
-	        utilGetSetValue(_wrap.selectAll('input'), function (subfield) {
-	                var val = tags[field.key + ':' + subfield.id];
-	                return typeof val === 'string' ? val : '';
-	            })
-	            .attr('title', function(subfield) {
-	                var val = tags[field.key + ':' + subfield.id];
-	                return val && Array.isArray(val) && val.filter(Boolean).join('\n');
-	            })
-	            .classed('mixed', function(subfield) {
-	                return Array.isArray(tags[field.key + ':' + subfield.id]);
-	            })
-	            .call(updatePlaceholder);
-	    }
+	          _oldTurns = null;
+	          actions = _intersection.actions.concat(extraActions, [actionUnrestrictTurn(datum), _t('operations.restriction.annotation.delete')]);
+	        } else {
+	          // Allowed -> NO
+	          actions = _intersection.actions.concat([actionRestrictTurn(datum, restrictionType), _t('operations.restriction.annotation.create')]);
+	        }
 
+	        context.perform.apply(context, actions); // At this point the datum will be changed, but will have same key..
+	        // Refresh it and update the help..
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	        var s = surface.selectAll('.' + datum.key);
+	        datum = s.empty() ? null : s.datum();
+	        updateHints(datum);
+	      } else {
+	        _fromWayID = null;
+	        _oldTurns = null;
+	        redraw();
+	      }
 	    }
 
+	    function mouseover(d3_event) {
+	      var datum = d3_event.target.__data__;
+	      updateHints(datum);
+	    }
 
-	    address.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return address;
-	    };
+	    _lastXPos = _lastXPos || sdims[0];
 
+	    function redraw(minChange) {
+	      var xPos = -1;
 
-	    address.tags = function(tags) {
-	        _tags = tags;
-	        updateTags(tags);
-	    };
+	      if (minChange) {
+	        xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
+	      }
 
+	      if (!minChange || minChange && Math.abs(xPos - _lastXPos) >= minChange) {
+	        if (context.hasEntity(_vertexID)) {
+	          _lastXPos = xPos;
 
-	    address.focus = function() {
-	        var node = _wrap.selectAll('input').node();
-	        if (node) { node.focus(); }
-	    };
+	          _container.call(renderViewer);
+	        }
+	      }
+	    }
 
+	    function highlightPathsFrom(wayID) {
+	      surface.selectAll('.related').classed('related', false).classed('allow', false).classed('restrict', false).classed('only', false);
+	      surface.selectAll('.' + wayID).classed('related', true);
 
-	    return utilRebind(address, dispatch$1, 'on');
-	}
+	      if (wayID) {
+	        var turns = _intersection.turns(wayID, _maxViaWay);
 
-	function uiFieldCycleway(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var items = select(null);
-	    var wrap = select(null);
-	    var _tags;
+	        for (var i = 0; i < turns.length; i++) {
+	          var turn = turns[i];
+	          var ids = [turn.to.way];
+	          var klass = turn.no ? 'restrict' : turn.only ? 'only' : 'allow';
 
-	    function cycleway(selection) {
+	          if (turn.only || turns.length === 1) {
+	            if (turn.via.ways) {
+	              ids = ids.concat(turn.via.ways);
+	            }
+	          } else if (turn.to.way === wayID) {
+	            continue;
+	          }
 
-	        function stripcolon(s) {
-	            return s.replace(':', '');
+	          surface.selectAll(utilEntitySelector(ids)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only');
 	        }
+	      }
+	    }
 
+	    function updateHints(datum) {
+	      var help = _container.selectAll('.restriction-help').html('');
 
-	        wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
-
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	      var placeholders = {};
+	      ['from', 'via', 'to'].forEach(function (k) {
+	        placeholders[k] = {
+	          html: '<span class="qualifier">' + _t('restriction.help.' + k) + '</span>'
+	        };
+	      });
+	      var entity = datum && datum.properties && datum.properties.entity;
 
+	      if (entity) {
+	        datum = entity;
+	      }
 
-	        var div = wrap.selectAll('ul')
-	            .data([0]);
+	      if (_fromWayID) {
+	        way = vgraph.entity(_fromWayID);
+	        surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+	      } // Hovering a way
+
+
+	      if (datum instanceof osmWay && datum.__from) {
+	        way = datum;
+	        highlightPathsFrom(_fromWayID ? null : way.id);
+	        surface.selectAll('.' + way.id).classed('related', true);
+	        var clickSelect = !_fromWayID || _fromWayID !== way.id;
+	        help.append('div') // "Click to select FROM {fromName}." / "FROM {fromName}"
+	        .html(_t.html('restriction.help.' + (clickSelect ? 'select_from_name' : 'from_name'), {
+	          from: placeholders.from,
+	          fromName: displayName(way.id, vgraph)
+	        })); // Hovering a turn arrow
+	      } else if (datum instanceof osmTurn) {
+	        var restrictionType = osmInferRestriction(vgraph, datum, projection);
+	        var turnType = restrictionType.replace(/^(only|no)\_/, '');
+	        var indirect = datum.direct === false ? _t.html('restriction.help.indirect') : '';
+	        var klass, turnText, nextText;
+
+	        if (datum.no) {
+	          klass = 'restrict';
+	          turnText = _t.html('restriction.help.turn.no_' + turnType, {
+	            indirect: indirect
+	          });
+	          nextText = _t.html('restriction.help.turn.only_' + turnType, {
+	            indirect: ''
+	          });
+	        } else if (datum.only) {
+	          klass = 'only';
+	          turnText = _t.html('restriction.help.turn.only_' + turnType, {
+	            indirect: indirect
+	          });
+	          nextText = _t.html('restriction.help.turn.allowed_' + turnType, {
+	            indirect: ''
+	          });
+	        } else {
+	          klass = 'allow';
+	          turnText = _t.html('restriction.help.turn.allowed_' + turnType, {
+	            indirect: indirect
+	          });
+	          nextText = _t.html('restriction.help.turn.no_' + turnType, {
+	            indirect: ''
+	          });
+	        }
 
-	        div = div.enter()
-	            .append('ul')
-	            .attr('class', 'rows')
-	            .merge(div);
+	        help.append('div') // "NO Right Turn (indirect)"
+	        .attr('class', 'qualifier ' + klass).html(turnText);
+	        help.append('div') // "FROM {fromName} TO {toName}"
+	        .html(_t.html('restriction.help.from_name_to_name', {
+	          from: placeholders.from,
+	          fromName: displayName(datum.from.way, vgraph),
+	          to: placeholders.to,
+	          toName: displayName(datum.to.way, vgraph)
+	        }));
 
-	        var keys = ['cycleway:left', 'cycleway:right'];
+	        if (datum.via.ways && datum.via.ways.length) {
+	          var names = [];
 
-	        items = div.selectAll('li')
-	            .data(keys);
+	          for (var i = 0; i < datum.via.ways.length; i++) {
+	            var prev = names[names.length - 1];
+	            var curr = displayName(datum.via.ways[i], vgraph);
 
-	        var enter = items.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'labeled-input preset-cycleway-' + stripcolon(d); });
+	            if (!prev || curr !== prev) {
+	              // collapse identical names
+	              names.push(curr);
+	            }
+	          }
 
-	        enter
-	            .append('span')
-	            .attr('class', 'label preset-label-cycleway')
-	            .attr('for', function(d) { return 'preset-input-cycleway-' + stripcolon(d); })
-	            .text(function(d) { return field.t('types.' + d); });
+	          help.append('div') // "VIA {viaNames}"
+	          .html(_t.html('restriction.help.via_names', {
+	            via: placeholders.via,
+	            viaNames: names.join(', ')
+	          }));
+	        }
 
-	        enter
-	            .append('div')
-	            .attr('class', 'preset-input-cycleway-wrap')
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', function(d) { return 'preset-input-cycleway preset-input-' + stripcolon(d); })
-	            .call(utilNoAuto)
-	            .each(function(d) {
-	                select(this)
-	                    .call(uiCombobox(context, 'cycleway-' + stripcolon(d))
-	                        .data(cycleway.options(d))
-	                    );
-	            });
+	        if (!indirect) {
+	          help.append('div') // Click for "No Right Turn"
+	          .html(_t.html('restriction.help.toggle', {
+	            turn: {
+	              html: nextText.trim()
+	            }
+	          }));
+	        }
 
-	        items = items.merge(enter);
+	        highlightPathsFrom(null);
+	        var alongIDs = datum.path.slice();
+	        surface.selectAll(utilEntitySelector(alongIDs)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only'); // Hovering empty surface
+	      } else {
+	        highlightPathsFrom(null);
 
-	        // Update
-	        wrap.selectAll('.preset-input-cycleway')
-	            .on('change', change)
-	            .on('blur', change);
+	        if (_fromWayID) {
+	          help.append('div') // "FROM {fromName}"
+	          .html(_t.html('restriction.help.from_name', {
+	            from: placeholders.from,
+	            fromName: displayName(_fromWayID, vgraph)
+	          }));
+	        } else {
+	          help.append('div') // "Click to select a FROM segment."
+	          .html(_t.html('restriction.help.select_from', {
+	            from: placeholders.from
+	          }));
+	        }
+	      }
 	    }
+	  }
 
+	  function displayMaxDistance(maxDist) {
+	    return function (selection) {
+	      var isImperial = !_mainLocalizer.usesMetric();
+	      var opts;
+
+	      if (isImperial) {
+	        var distToFeet = {
+	          // imprecise conversion for prettier display
+	          20: 70,
+	          25: 85,
+	          30: 100,
+	          35: 115,
+	          40: 130,
+	          45: 145,
+	          50: 160
+	        }[maxDist];
+	        opts = {
+	          distance: _t('units.feet', {
+	            quantity: distToFeet
+	          })
+	        };
+	      } else {
+	        opts = {
+	          distance: _t('units.meters', {
+	            quantity: maxDist
+	          })
+	        };
+	      }
 
-	    function change(key) {
-
-	        var newValue = context.cleanTagValue(utilGetSetValue(select(this)));
+	      return selection.html('').call(_t.append('restriction.controls.distance_up_to', opts));
+	    };
+	  }
 
-	        // don't override multiple values with blank string
-	        if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) { return; }
+	  function displayMaxVia(maxVia) {
+	    return function (selection) {
+	      selection = selection.html('');
+	      return maxVia === 0 ? selection.call(_t.append('restriction.controls.via_node_only')) : maxVia === 1 ? selection.call(_t.append('restriction.controls.via_up_to_one')) : selection.call(_t.append('restriction.controls.via_up_to_two'));
+	    };
+	  }
 
-	        if (newValue === 'none' || newValue === '') { newValue = undefined; }
+	  function displayName(entityID, graph) {
+	    var entity = graph.entity(entityID);
+	    var name = utilDisplayName(entity) || '';
+	    var matched = _mainPresetIndex.match(entity, graph);
+	    var type = matched && matched.name() || utilDisplayType(entity.id);
+	    return name || type;
+	  }
 
-	        var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
-	        var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];
-	        if (otherValue && Array.isArray(otherValue)) {
-	            // we must always have an explicit value for comparison
-	            otherValue = otherValue[0];
-	        }
-	        if (otherValue === 'none' || otherValue === '') { otherValue = undefined; }
+	  restrictions.entityIDs = function (val) {
+	    _intersection = null;
+	    _fromWayID = null;
+	    _oldTurns = null;
+	    _vertexID = val[0];
+	  };
 
-	        var tag = {};
+	  restrictions.tags = function () {};
 
-	        // If the left and right tags match, use the cycleway tag to tag both
-	        // sides the same way
-	        if (newValue === otherValue) {
-	            tag = {
-	                cycleway: newValue,
-	                'cycleway:left': undefined,
-	                'cycleway:right': undefined
-	            };
-	        } else {
-	            // Always set both left and right as changing one can affect the other
-	            tag = {
-	                cycleway: undefined
-	            };
-	            tag[key] = newValue;
-	            tag[otherKey] = otherValue;
-	        }
+	  restrictions.focus = function () {};
 
-	        dispatch$1.call('change', this, tag);
-	    }
+	  restrictions.off = function (selection) {
+	    if (!_initialized) return;
+	    selection.selectAll('.surface').call(breathe.off).on('click.restrictions', null).on('mouseover.restrictions', null);
+	    select(window).on('resize.restrictions', null);
+	  };
 
+	  return utilRebind(restrictions, dispatch, 'on');
+	}
+	uiFieldRestrictions.supportsMultiselection = false;
 
-	    cycleway.options = function() {
-	        return Object.keys(field.strings.options).map(function(option) {
-	            return {
-	                title: field.t('options.' + option + '.description'),
-	                value: option
-	            };
-	        });
-	    };
+	function uiFieldTextarea(field, context) {
+	  var dispatch = dispatch$8('change');
+	  var input = select(null);
 
+	  var _tags;
 
-	    cycleway.tags = function(tags) {
-	        _tags = tags;
+	  function textarea(selection) {
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    input = wrap.selectAll('textarea').data([0]);
+	    input = input.enter().append('textarea').attr('id', field.domId).call(utilNoAuto).on('input', change(true)).on('blur', change()).on('change', change()).merge(input);
+	  }
 
-	        // If cycleway is set, use that instead of individual values
-	        var commonValue = typeof tags.cycleway === 'string' && tags.cycleway;
+	  function change(onInput) {
+	    return function () {
+	      var val = utilGetSetValue(input);
+	      if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
 
-	        utilGetSetValue(items.selectAll('.preset-input-cycleway'), function(d) {
-	                if (commonValue) { return commonValue; }
-	                return !tags.cycleway && typeof tags[d] === 'string' ? tags[d] : '';
-	            })
-	            .attr('title', function(d) {
-	                if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
-	                    var vals = [];
-	                    if (Array.isArray(tags.cycleway)) {
-	                        vals = vals.concat(tags.cycleway);
-	                    }
-	                    if (Array.isArray(tags[d])) {
-	                        vals = vals.concat(tags[d]);
-	                    }
-	                    return vals.filter(Boolean).join('\n');
-	                }
-	                return null;
-	            })
-	            .attr('placeholder', function(d) {
-	                if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
-	                    return _t('inspector.multiple_values');
-	                }
-	                return field.placeholder();
-	            })
-	            .classed('mixed', function(d) {
-	                return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
-	            });
+	      if (!val && Array.isArray(_tags[field.key])) return;
+	      var t = {};
+	      t[field.key] = val || undefined;
+	      dispatch.call('change', this, t, onInput);
 	    };
+	  }
 
+	  textarea.tags = function (tags) {
+	    _tags = tags;
+	    var isMixed = Array.isArray(tags[field.key]);
+	    utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder() || _t('inspector.unknown')).classed('mixed', isMixed);
+	  };
 
-	    cycleway.focus = function() {
-	        var node = wrap.selectAll('input').node();
-	        if (node) { node.focus(); }
-	    };
-
+	  textarea.focus = function () {
+	    input.node().focus();
+	  };
 
-	    return utilRebind(cycleway, dispatch$1, 'on');
+	  return utilRebind(textarea, dispatch, 'on');
 	}
 
-	function uiFieldLanes(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var LANE_WIDTH = 40;
-	    var LANE_HEIGHT = 200;
-	    var _entityIDs = [];
-
-	    function lanes(selection) {
-	        var lanesData = context.entity(_entityIDs[0]).lanes();
+	function uiFieldWikidata(field, context) {
+	  var wikidata = services.wikidata;
+	  var dispatch = dispatch$8('change');
 
-	        if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
-	            selection.call(lanes.off);
-	            return;
-	        }
+	  var _selection = select(null);
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  var _searchInput = select(null);
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	  var _qid = null;
+	  var _wikidataEntity = null;
+	  var _wikiURL = '';
+	  var _entityIDs = [];
 
-	        var surface =  wrap.selectAll('.surface')
-	            .data([0]);
+	  var _wikipediaKey = field.keys && field.keys.find(function (key) {
+	    return key.includes('wikipedia');
+	  }),
+	      _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];
 
-	        var d = utilGetDimensions(wrap);
-	        var freeSpace = d[0] - lanesData.lanes.length * LANE_WIDTH * 1.5 + LANE_WIDTH * 0.5;
+	  var combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(true).minItems(1);
 
-	        surface = surface.enter()
-	            .append('svg')
-	            .attr('width', d[0])
-	            .attr('height', 300)
-	            .attr('class', 'surface')
-	            .merge(surface);
+	  function wiki(selection) {
+	    _selection = selection;
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    var list = wrap.selectAll('ul').data([0]);
+	    list = list.enter().append('ul').attr('class', 'rows').merge(list);
+	    var searchRow = list.selectAll('li.wikidata-search').data([0]);
+	    var searchRowEnter = searchRow.enter().append('li').attr('class', 'wikidata-search');
+	    searchRowEnter.append('input').attr('type', 'text').attr('id', field.domId).style('flex', '1').call(utilNoAuto).on('focus', function () {
+	      var node = select(this).node();
+	      node.setSelectionRange(0, node.value.length);
+	    }).on('blur', function () {
+	      setLabelForEntity();
+	    }).call(combobox.fetcher(fetchWikidataItems));
+	    combobox.on('accept', function (d) {
+	      if (d) {
+	        _qid = d.id;
+	        change();
+	      }
+	    }).on('cancel', function () {
+	      setLabelForEntity();
+	    });
+	    searchRowEnter.append('button').attr('class', 'form-field-button wiki-link').attr('title', _t('icons.view_on', {
+	      domain: 'wikidata.org'
+	    })).call(svgIcon('#iD-icon-out-link')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      if (_wikiURL) window.open(_wikiURL, '_blank');
+	    });
+	    searchRow = searchRow.merge(searchRowEnter);
+	    _searchInput = searchRow.select('input');
+	    var wikidataProperties = ['description', 'identifier'];
+	    var items = list.selectAll('li.labeled-input').data(wikidataProperties); // Enter
 
+	    var enter = items.enter().append('li').attr('class', function (d) {
+	      return 'labeled-input preset-wikidata-' + d;
+	    });
+	    enter.append('span').attr('class', 'label').html(function (d) {
+	      return _t.html('wikidata.' + d);
+	    });
+	    enter.append('input').attr('type', 'text').call(utilNoAuto).classed('disabled', 'true').attr('readonly', 'true');
+	    enter.append('button').attr('class', 'form-field-button').attr('title', _t('icons.copy')).call(svgIcon('#iD-operation-copy')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      select(this.parentNode).select('input').node().select();
+	      document.execCommand('copy');
+	    });
+	  }
 
-	        var lanesSelection = surface.selectAll('.lanes')
-	            .data([0]);
+	  function fetchWikidataItems(q, callback) {
+	    if (!q && _hintKey) {
+	      // other tags may be good search terms
+	      for (var i in _entityIDs) {
+	        var entity = context.hasEntity(_entityIDs[i]);
 
-	        lanesSelection = lanesSelection.enter()
-	            .append('g')
-	            .attr('class', 'lanes')
-	            .merge(lanesSelection);
+	        if (entity.tags[_hintKey]) {
+	          q = entity.tags[_hintKey];
+	          break;
+	        }
+	      }
+	    }
 
-	        lanesSelection
-	            .attr('transform', function () {
-	                return 'translate(' + (freeSpace / 2) + ', 0)';
-	            });
+	    wikidata.itemsForSearchQuery(q, function (err, data) {
+	      if (err) return;
 
+	      for (var i in data) {
+	        data[i].value = data[i].label + ' (' + data[i].id + ')';
+	        data[i].title = data[i].description;
+	      }
 
-	        var lane = lanesSelection.selectAll('.lane')
-	           .data(lanesData.lanes);
-
-	        lane.exit()
-	            .remove();
-
-	        var enter = lane.enter()
-	            .append('g')
-	            .attr('class', 'lane');
-
-	        enter
-	            .append('g')
-	            .append('rect')
-	            .attr('y', 50)
-	            .attr('width', LANE_WIDTH)
-	            .attr('height', LANE_HEIGHT);
-
-	        enter
-	            .append('g')
-	            .attr('class', 'forward')
-	            .append('text')
-	            .attr('y', 40)
-	            .attr('x', 14)
-	            .text('▲');
-
-	        enter
-	            .append('g')
-	            .attr('class', 'bothways')
-	            .append('text')
-	            .attr('y', 40)
-	            .attr('x', 14)
-	            .text('▲▼');
-
-	        enter
-	            .append('g')
-	            .attr('class', 'backward')
-	            .append('text')
-	            .attr('y', 40)
-	            .attr('x', 14)
-	            .text('▼');
-
-
-	        lane = lane
-	            .merge(enter);
-
-	        lane
-	            .attr('transform', function(d) {
-	                return 'translate(' + (LANE_WIDTH * d.index * 1.5) + ', 0)';
-	            });
+	      if (callback) callback(data);
+	    });
+	  }
 
-	        lane.select('.forward')
-	            .style('visibility', function(d) {
-	                return d.direction === 'forward' ? 'visible' : 'hidden';
-	            });
+	  function change() {
+	    var syncTags = {};
+	    syncTags[field.key] = _qid;
+	    dispatch.call('change', this, syncTags); // attempt asynchronous update of wikidata tag..
 
-	        lane.select('.bothways')
-	            .style('visibility', function(d) {
-	                return d.direction === 'bothways' ? 'visible' : 'hidden';
-	            });
+	    var initGraph = context.graph();
+	    var initEntityIDs = _entityIDs;
+	    wikidata.entityByQID(_qid, function (err, entity) {
+	      if (err) return; // If graph has changed, we can't apply this update.
 
-	        lane.select('.backward')
-	            .style('visibility', function(d) {
-	                return d.direction === 'backward' ? 'visible' : 'hidden';
-	            });
-	    }
+	      if (context.graph() !== initGraph) return;
+	      if (!entity.sitelinks) return;
+	      var langs = wikidata.languagesToQuery(); // use the label and description languages as fallbacks
 
+	      ['labels', 'descriptions'].forEach(function (key) {
+	        if (!entity[key]) return;
+	        var valueLangs = Object.keys(entity[key]);
+	        if (valueLangs.length === 0) return;
+	        var valueLang = valueLangs[0];
 
-	    lanes.entityIDs = function(val) {
-	        _entityIDs = val;
-	    };
+	        if (langs.indexOf(valueLang) === -1) {
+	          langs.push(valueLang);
+	        }
+	      });
+	      var newWikipediaValue;
 
-	    lanes.tags = function() {};
-	    lanes.focus = function() {};
-	    lanes.off = function() {};
+	      if (_wikipediaKey) {
+	        var foundPreferred;
 
-	    return utilRebind(lanes, dispatch$1, 'on');
-	}
+	        for (var i in langs) {
+	          var lang = langs[i];
+	          var siteID = lang.replace('-', '_') + 'wiki';
 
-	uiFieldLanes.supportsMultiselection = false;
+	          if (entity.sitelinks[siteID]) {
+	            foundPreferred = true;
+	            newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title; // use the first match
 
-	var _languagesArray = [];
+	            break;
+	          }
+	        }
 
+	        if (!foundPreferred) {
+	          // No wikipedia sites available in the user's language or the fallback languages,
+	          // default to any wikipedia sitelink
+	          var wikiSiteKeys = Object.keys(entity.sitelinks).filter(function (site) {
+	            return site.endsWith('wiki');
+	          });
 
-	function uiFieldLocalized(field, context) {
-	    var dispatch$1 = dispatch('change', 'input');
-	    var wikipedia = services.wikipedia;
-	    var input = select(null);
-	    var localizedInputs = select(null);
-	    var _countryCode;
-	    var _tags;
+	          if (wikiSiteKeys.length === 0) {
+	            // if no wikipedia pages are linked to this wikidata entity, delete that tag
+	            newWikipediaValue = null;
+	          } else {
+	            var wikiLang = wikiSiteKeys[0].slice(0, -4).replace('_', '-');
+	            var wikiTitle = entity.sitelinks[wikiSiteKeys[0]].title;
+	            newWikipediaValue = wikiLang + ':' + wikiTitle;
+	          }
+	        }
+	      }
 
+	      if (newWikipediaValue) {
+	        newWikipediaValue = context.cleanTagValue(newWikipediaValue);
+	      }
 
-	    // A concern here in switching to async data means that _languagesArray will not
-	    // be available the first time through, so things like the fetchers and
-	    // the language() function will not work immediately.
-	    _mainFileFetcher.get('languages')
-	        .then(loadLanguagesArray)
-	        .catch(function() { /* ignore */ });
+	      if (typeof newWikipediaValue === 'undefined') return;
+	      var actions = initEntityIDs.map(function (entityID) {
+	        var entity = context.hasEntity(entityID);
+	        if (!entity) return null;
+	        var currTags = Object.assign({}, entity.tags); // shallow copy
 
-	    var _territoryLanguages = {};
-	    _mainFileFetcher.get('territory_languages')
-	        .then(function(d) { _territoryLanguages = d; })
-	        .catch(function() { /* ignore */ });
+	        if (newWikipediaValue === null) {
+	          if (!currTags[_wikipediaKey]) return null;
+	          delete currTags[_wikipediaKey];
+	        } else {
+	          currTags[_wikipediaKey] = newWikipediaValue;
+	        }
 
+	        return actionChangeTags(entityID, currTags);
+	      }).filter(Boolean);
+	      if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
 
-	    var allSuggestions = _mainPresetIndex.collection.filter(function(p) {
-	        return p.suggestion === true;
+	      context.overwrite(function actionUpdateWikipediaTags(graph) {
+	        actions.forEach(function (action) {
+	          graph = action(graph);
+	        });
+	        return graph;
+	      }, context.history().undoAnnotation()); // do not dispatch.call('change') here, because entity_editor
+	      // changeTags() is not intended to be called asynchronously
 	    });
+	  }
 
-	    // reuse these combos
-	    var langCombo = uiCombobox(context, 'localized-lang')
-	        .fetcher(fetchLanguages)
-	        .minItems(0);
-
-	    var brandCombo = uiCombobox(context, 'localized-brand')
-	        .canAutocomplete(false)
-	        .minItems(1);
-
-	    var _selection = select(null);
-	    var _multilingual = [];
-	    var _buttonTip = uiTooltip()
-	        .title(_t('translate.translate'))
-	        .placement('left');
-	    var _wikiTitles;
-	    var _entityIDs = [];
+	  function setLabelForEntity() {
+	    var label = '';
 
+	    if (_wikidataEntity) {
+	      label = entityPropertyForDisplay(_wikidataEntity, 'labels');
 
-	    function loadLanguagesArray(dataLanguages) {
-	        if (_languagesArray.length !== 0) { return; }
+	      if (label.length === 0) {
+	        label = _wikidataEntity.id.toString();
+	      }
+	    }
 
-	        // some conversion is needed to ensure correct OSM tags are used
-	        var replacements = {
-	            sr: 'sr-Cyrl',      // in OSM, `sr` implies Cyrillic
-	            'sr-Cyrl': false    // `sr-Cyrl` isn't used in OSM
-	        };
+	    utilGetSetValue(_searchInput, label);
+	  }
 
-	        for (var code in dataLanguages) {
-	            if (replacements[code] === false) { continue; }
-	            var metaCode = code;
-	            if (replacements[code]) { metaCode = replacements[code]; }
+	  wiki.tags = function (tags) {
+	    var isMixed = Array.isArray(tags[field.key]);
 
-	            _languagesArray.push({
-	                localName: _mainLocalizer.languageName(metaCode, { localOnly: true }),
-	                nativeName: dataLanguages[metaCode].nativeName,
-	                code: code,
-	                label: _mainLocalizer.languageName(metaCode)
-	            });
-	        }
-	    }
+	    _searchInput.attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : '').classed('mixed', isMixed);
 
+	    _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
 
-	    function calcLocked() {
+	    if (!/^Q[0-9]*$/.test(_qid)) {
+	      // not a proper QID
+	      unrecognized();
+	      return;
+	    } // QID value in correct format
 
-	        // only lock the Name field
-	        var isLocked = field.id === 'name' &&
-	            _entityIDs.length &&
-	            // lock the field if any feature needs it
-	            _entityIDs.some(function(entityID) {
 
-	                var entity = context.graph().hasEntity(entityID);
-	                if (!entity) { return false; }
+	    _wikiURL = 'https://wikidata.org/wiki/' + _qid;
+	    wikidata.entityByQID(_qid, function (err, entity) {
+	      if (err) {
+	        unrecognized();
+	        return;
+	      }
 
-	                var original = context.graph().base().entities[_entityIDs[0]];
-	                var hasOriginalName = original && entity.tags.name && entity.tags.name === original.tags.name;
-	                // if the name was already edited manually then allow further editing
-	                if (!hasOriginalName) { return false; }
+	      _wikidataEntity = entity;
+	      setLabelForEntity();
+	      var description = entityPropertyForDisplay(entity, 'descriptions');
 
-	                // features linked to Wikidata are likely important and should be protected
-	                if (entity.tags.wikidata) { return true; }
+	      _selection.select('button.wiki-link').classed('disabled', false);
 
-	                // assume the name has already been confirmed if its source has been researched
-	                if (entity.tags['name:etymology:wikidata']) { return true; }
+	      _selection.select('.preset-wikidata-description').style('display', function () {
+	        return description.length > 0 ? 'flex' : 'none';
+	      }).select('input').attr('value', description);
 
-	                var preset = _mainPresetIndex.match(entity, context.graph());
-	                var isSuggestion = preset && preset.suggestion;
-	                var showsBrand = preset && preset.originalFields.filter(function(d) {
-	                    return d.id === 'brand';
-	                }).length;
-	                // protect standardized brand names
-	                return isSuggestion && !showsBrand;
-	            });
+	      _selection.select('.preset-wikidata-identifier').style('display', function () {
+	        return entity.id ? 'flex' : 'none';
+	      }).select('input').attr('value', entity.id);
+	    }); // not a proper QID
 
-	        field.locked(isLocked);
-	    }
+	    function unrecognized() {
+	      _wikidataEntity = null;
+	      setLabelForEntity();
 
+	      _selection.select('.preset-wikidata-description').style('display', 'none');
 
-	    // update _multilingual, maintaining the existing order
-	    function calcMultilingual(tags) {
-	        var existingLangsOrdered = _multilingual.map(function(item) {
-	            return item.lang;
-	        });
-	        var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
+	      _selection.select('.preset-wikidata-identifier').style('display', 'none');
 
-	        for (var k in tags) {
-	            var m = k.match(/^(.*):([a-zA-Z_-]+)$/);
-	            if (m && m[1] === field.key && m[2]) {
-	                var item = { lang: m[2], value: tags[k] };
-	                if (existingLangs.has(item.lang)) {
-	                    // update the value
-	                    _multilingual[existingLangsOrdered.indexOf(item.lang)].value = item.value;
-	                    existingLangs.delete(item.lang);
-	                } else {
-	                    _multilingual.push(item);
-	                }
-	            }
-	        }
+	      _selection.select('button.wiki-link').classed('disabled', true);
 
-	        _multilingual = _multilingual.filter(function(item) {
-	            return !item.lang || !existingLangs.has(item.lang);
-	        });
+	      if (_qid && _qid !== '') {
+	        _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
+	      } else {
+	        _wikiURL = '';
+	      }
 	    }
+	  };
 
+	  function entityPropertyForDisplay(wikidataEntity, propKey) {
+	    if (!wikidataEntity[propKey]) return '';
+	    var propObj = wikidataEntity[propKey];
+	    var langKeys = Object.keys(propObj);
+	    if (langKeys.length === 0) return ''; // sorted by priority, since we want to show the user's language first if possible
 
-	    function localized(selection) {
-	        _selection = selection;
-	        calcLocked();
-	        var isLocked = field.locked();
-	        var singularEntity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
-	        var preset = singularEntity && _mainPresetIndex.match(singularEntity, context.graph());
+	    var langs = wikidata.languagesToQuery();
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    for (var i in langs) {
+	      var lang = langs[i];
+	      var valueObj = propObj[lang];
+	      if (valueObj && valueObj.value && valueObj.value.length > 0) return valueObj.value;
+	    } // default to any available value
 
-	        // enter/update
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
-
-	        input = wrap.selectAll('.localized-main')
-	            .data([0]);
-
-	        // enter/update
-	        input = input.enter()
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('id', field.domId)
-	            .attr('class', 'localized-main')
-	            .call(utilNoAuto)
-	            .merge(input);
-
-	        if (preset && field.id === 'name') {
-	            var pTag = preset.id.split('/', 2);
-	            var pKey = pTag[0];
-	            var pValue = pTag[1];
-
-	            if (!preset.suggestion) {
-	                // Not a suggestion preset - Add a suggestions dropdown if it makes sense to.
-	                // This code attempts to determine if the matched preset is the
-	                // kind of preset that even can benefit from name suggestions..
-	                // - true = shops, cafes, hotels, etc. (also generic and fallback presets)
-	                // - false = churches, parks, hospitals, etc. (things not in the index)
-	                var isFallback = preset.isFallback();
-	                var goodSuggestions = allSuggestions.filter(function(s) {
-	                    if (isFallback) { return true; }
-	                    var sTag = s.id.split('/', 2);
-	                    var sKey = sTag[0];
-	                    var sValue = sTag[1];
-	                    return pKey === sKey && (!pValue || pValue === sValue);
-	                });
 
-	                // Show the suggestions.. If the user picks one, change the tags..
-	                if (allSuggestions.length && goodSuggestions.length) {
-	                    input
-	                        .on('blur.localized', checkBrandOnBlur)
-	                        .call(brandCombo
-	                            .fetcher(fetchBrandNames(preset, allSuggestions))
-	                            .on('accept', acceptBrand)
-	                            .on('cancel', cancelBrand)
-	                        );
-	                }
-	            }
-	        }
+	    return propObj[langKeys[0]].value;
+	  }
 
-	        input
-	            .classed('disabled', !!isLocked)
-	            .attr('readonly', isLocked || null)
-	            .on('input', change(true))
-	            .on('blur', change())
-	            .on('change', change());
+	  wiki.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return wiki;
+	  };
 
+	  wiki.focus = function () {
+	    _searchInput.node().focus();
+	  };
 
-	        var translateButton = wrap.selectAll('.localized-add')
-	            .data([0]);
+	  return utilRebind(wiki, dispatch, 'on');
+	}
 
-	        translateButton = translateButton.enter()
-	            .append('button')
-	            .attr('class', 'localized-add form-field-button')
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-plus'))
-	            .merge(translateButton);
+	function uiFieldWikipedia(field, context) {
+	  var _arguments = arguments;
+	  var dispatch = dispatch$8('change');
+	  var wikipedia = services.wikipedia;
+	  var wikidata = services.wikidata;
 
-	        translateButton
-	            .classed('disabled', !!isLocked)
-	            .call(isLocked ? _buttonTip.destroy : _buttonTip)
-	            .on('click', addNew);
+	  var _langInput = select(null);
 
+	  var _titleInput = select(null);
 
-	        if (_tags && !_multilingual.length) {
-	            calcMultilingual(_tags);
-	        }
+	  var _wikiURL = '';
 
-	        localizedInputs = selection.selectAll('.localized-multilingual')
-	            .data([0]);
+	  var _entityIDs;
 
-	        localizedInputs = localizedInputs.enter()
-	            .append('div')
-	            .attr('class', 'localized-multilingual')
-	            .merge(localizedInputs);
+	  var _tags;
 
-	        localizedInputs
-	            .call(renderMultilingual);
+	  var _dataWikipedia = [];
+	  _mainFileFetcher.get('wmf_sitematrix').then(function (d) {
+	    _dataWikipedia = d;
+	    if (_tags) updateForTags(_tags);
+	  })["catch"](function () {
+	    /* ignore */
+	  });
+	  var langCombo = uiCombobox(context, 'wikipedia-lang').fetcher(function (value, callback) {
+	    var v = value.toLowerCase();
+	    callback(_dataWikipedia.filter(function (d) {
+	      return d[0].toLowerCase().indexOf(v) >= 0 || d[1].toLowerCase().indexOf(v) >= 0 || d[2].toLowerCase().indexOf(v) >= 0;
+	    }).map(function (d) {
+	      return {
+	        value: d[1]
+	      };
+	    }));
+	  });
+	  var titleCombo = uiCombobox(context, 'wikipedia-title').fetcher(function (value, callback) {
+	    if (!value) {
+	      value = '';
 
-	        localizedInputs.selectAll('button, input')
-	            .classed('disabled', !!isLocked)
-	            .attr('readonly', isLocked || null);
+	      for (var i in _entityIDs) {
+	        var entity = context.hasEntity(_entityIDs[i]);
 
+	        if (entity.tags.name) {
+	          value = entity.tags.name;
+	          break;
+	        }
+	      }
+	    }
 
+	    var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
+	    searchfn(language()[2], value, function (query, data) {
+	      callback(data.map(function (d) {
+	        return {
+	          value: d
+	        };
+	      }));
+	    });
+	  });
 
-	        // We are not guaranteed to get an `accept` or `cancel` when blurring the field.
-	        // (This can happen if the user actives the combo, arrows down, and then clicks off to blur)
-	        // So compare the current field value against the suggestions one last time.
-	        function checkBrandOnBlur() {
-	            var latest = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
-	            if (!latest) { return; }   // deleting the entity blurred the field?
+	  function wiki(selection) {
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', "form-field-input-wrap form-field-input-".concat(field.type)).merge(wrap);
+	    var langContainer = wrap.selectAll('.wiki-lang-container').data([0]);
+	    langContainer = langContainer.enter().append('div').attr('class', 'wiki-lang-container').merge(langContainer);
+	    _langInput = langContainer.selectAll('input.wiki-lang').data([0]);
+	    _langInput = _langInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-lang').attr('placeholder', _t('translate.localized_translation_language')).call(utilNoAuto).call(langCombo).merge(_langInput);
+
+	    _langInput.on('blur', changeLang).on('change', changeLang);
+
+	    var titleContainer = wrap.selectAll('.wiki-title-container').data([0]);
+	    titleContainer = titleContainer.enter().append('div').attr('class', 'wiki-title-container').merge(titleContainer);
+	    _titleInput = titleContainer.selectAll('input.wiki-title').data([0]);
+	    _titleInput = _titleInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-title').attr('id', field.domId).call(utilNoAuto).call(titleCombo).merge(_titleInput);
+
+	    _titleInput.on('blur', function () {
+	      change(true);
+	    }).on('change', function () {
+	      change(false);
+	    });
 
-	            var preset = _mainPresetIndex.match(latest, context.graph());
-	            if (preset && preset.suggestion) { return; }   // already accepted
+	    var link = titleContainer.selectAll('.wiki-link').data([0]);
+	    link = link.enter().append('button').attr('class', 'form-field-button wiki-link').attr('title', _t('icons.view_on', {
+	      domain: 'wikipedia.org'
+	    })).call(svgIcon('#iD-icon-out-link')).merge(link);
+	    link.on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      if (_wikiURL) window.open(_wikiURL, '_blank');
+	    });
+	  }
 
-	            // note: here we are testing against "decorated" names, i.e. 'Starbucks – Cafe'
-	            var name = utilGetSetValue(input).trim();
-	            var matched = allSuggestions.filter(function(s) { return name === s.name(); });
+	  function defaultLanguageInfo(skipEnglishFallback) {
+	    var langCode = _mainLocalizer.languageCode().toLowerCase();
 
-	            if (matched.length === 1) {
-	                acceptBrand({ suggestion: matched[0] });
-	            } else {
-	                cancelBrand();
-	            }
-	        }
+	    for (var i in _dataWikipedia) {
+	      var d = _dataWikipedia[i]; // default to the language of iD's current locale
 
+	      if (d[2] === langCode) return d;
+	    } // fallback to English
 
-	        function acceptBrand(d) {
 
-	            var entity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
+	    return skipEnglishFallback ? ['', '', ''] : ['English', 'English', 'en'];
+	  }
 
-	            if (!d || !entity) {
-	                cancelBrand();
-	                return;
-	            }
+	  function language(skipEnglishFallback) {
+	    var value = utilGetSetValue(_langInput).toLowerCase();
 
-	            var tags = entity.tags;
-	            var geometry = entity.geometry(context.graph());
-	            var removed = preset.unsetTags(tags, geometry);
-	            for (var k in tags) {
-	                tags[k] = removed[k];  // set removed tags to `undefined`
-	            }
-	            tags = d.suggestion.setTags(tags, geometry);
-	            utilGetSetValue(input, tags.name);
-	            dispatch$1.call('change', this, tags);
-	        }
+	    for (var i in _dataWikipedia) {
+	      var d = _dataWikipedia[i]; // return the language already set in the UI, if supported
 
+	      if (d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value) return d;
+	    } // fallback to English
 
-	        // user hit escape, clean whatever preset name appears after the last ' – '
-	        function cancelBrand() {
-	            var name = utilGetSetValue(input);
-	            var clean = cleanName(name);
-	            if (clean !== name) {
-	                utilGetSetValue(input, clean);
-	                dispatch$1.call('change', this, { name: clean });
-	            }
-	        }
 
-	        // Remove whatever is after the last ' – '
-	        // NOTE: split/join on en-dash, not a hypen (to avoid conflict with fr - nl names in Brussels etc)
-	        function cleanName(name) {
-	            var parts = name.split(' – ');
-	            if (parts.length > 1) {
-	                parts.pop();
-	                name = parts.join(' – ');
-	            }
-	            return name;
-	        }
-
-
-	        function fetchBrandNames(preset, suggestions) {
-	            var pTag = preset.id.split('/', 2);
-	            var pKey = pTag[0];
-	            var pValue = pTag[1];
-
-	            return function(value, callback) {
-	                var results = [];
-	                if (value && value.length > 2) {
-	                    for (var i = 0; i < suggestions.length; i++) {
-	                        var s = suggestions[i];
-
-	                        // don't suggest brands from incompatible countries
-	                        if (_countryCode && s.countryCodes &&
-	                            s.countryCodes.indexOf(_countryCode) === -1) { continue; }
-
-	                        var sTag = s.id.split('/', 2);
-	                        var sKey = sTag[0];
-	                        var sValue = sTag[1];
-	                        var name = s.name();
-	                        var dist = utilEditDistance(value, name.substring(0, value.length));
-	                        var matchesPreset = (pKey === sKey && (!pValue || pValue === sValue));
-
-	                        if (dist < 1 || (matchesPreset && dist < 3)) {
-	                            var obj = {
-	                                title: name,
-	                                value: name,
-	                                suggestion: s,
-	                                dist: dist + (matchesPreset ? 0 : 1)  // penalize if not matched preset
-	                            };
-	                            results.push(obj);
-	                        }
-	                    }
-	                    results.sort(function(a, b) { return a.dist - b.dist; });
-	                }
-	                results = results.slice(0, 10);
-	                callback(results);
-	            };
-	        }
+	    return defaultLanguageInfo(skipEnglishFallback);
+	  }
 
+	  function changeLang() {
+	    utilGetSetValue(_langInput, language()[1]);
+	    change(true);
+	  }
 
-	        function addNew() {
-	            event.preventDefault();
-	            if (field.locked()) { return; }
+	  function change(skipWikidata) {
+	    var value = utilGetSetValue(_titleInput);
+	    var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);
 
-	            var defaultLang = _mainLocalizer.languageCode().toLowerCase();
-	            var langExists = _multilingual.find(function(datum) { return datum.lang === defaultLang; });
-	            var isLangEn = defaultLang.indexOf('en') > -1;
-	            if (isLangEn || langExists) {
-	                defaultLang = '';
-	                langExists = _multilingual.find(function(datum) { return datum.lang === defaultLang; });
-	            }
+	    var langInfo = m && _dataWikipedia.find(function (d) {
+	      return m[1] === d[2];
+	    });
 
-	            if (!langExists) {
-	                // prepend the value so it appears at the top
-	                _multilingual.unshift({ lang: defaultLang, value: '' });
+	    var syncTags = {};
 
-	                localizedInputs
-	                    .call(renderMultilingual);
-	            }
-	        }
+	    if (langInfo) {
+	      var nativeLangName = langInfo[1]; // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
 
+	      value = decodeURIComponent(m[2]).replace(/_/g, ' ');
 
-	        function change(onInput) {
-	            return function() {
-	                if (field.locked()) {
-	                    event.preventDefault();
-	                    return;
-	                }
+	      if (m[3]) {
+	        var anchor; // try {
+	        // leave this out for now - #6232
+	        // Best-effort `anchordecode:` implementation
+	        // anchor = decodeURIComponent(m[3].replace(/\.([0-9A-F]{2})/g, '%$1'));
+	        // } catch (e) {
 
-	                var val = utilGetSetValue(select(this));
-	                if (!onInput) { val = context.cleanTagValue(val); }
+	        anchor = decodeURIComponent(m[3]); // }
 
-	                // don't override multiple values with blank string
-	                if (!val && Array.isArray(_tags[field.key])) { return; }
+	        value += '#' + anchor.replace(/_/g, ' ');
+	      }
 
-	                var t = {};
+	      value = value.slice(0, 1).toUpperCase() + value.slice(1);
+	      utilGetSetValue(_langInput, nativeLangName);
+	      utilGetSetValue(_titleInput, value);
+	    }
 
-	                t[field.key] = val || undefined;
-	                dispatch$1.call('change', this, t, onInput);
-	            };
-	        }
+	    if (value) {
+	      syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
+	    } else {
+	      syncTags.wikipedia = undefined;
 	    }
 
+	    dispatch.call('change', this, syncTags);
+	    if (skipWikidata || !value || !language()[2]) return; // attempt asynchronous update of wikidata tag..
 
-	    function key(lang) {
-	        return field.key + ':' + lang;
-	    }
+	    var initGraph = context.graph();
+	    var initEntityIDs = _entityIDs;
+	    wikidata.itemsByTitle(language()[2], value, function (err, data) {
+	      if (err || !data || !Object.keys(data).length) return; // If graph has changed, we can't apply this update.
 
+	      if (context.graph() !== initGraph) return;
+	      var qids = Object.keys(data);
+	      var value = qids && qids.find(function (id) {
+	        return id.match(/^Q\d+$/);
+	      });
+	      var actions = initEntityIDs.map(function (entityID) {
+	        var entity = context.entity(entityID).tags;
+	        var currTags = Object.assign({}, entity); // shallow copy
 
-	    function changeLang(d) {
-	        var tags = {};
+	        if (currTags.wikidata !== value) {
+	          currTags.wikidata = value;
+	          return actionChangeTags(entityID, currTags);
+	        }
 
-	        // make sure unrecognized suffixes are lowercase - #7156
-	        var lang = utilGetSetValue(select(this)).toLowerCase();
+	        return null;
+	      }).filter(Boolean);
+	      if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
 
-	        var language = _languagesArray.find(function(d) {
-	            return d.label.toLowerCase() === lang ||
-	                (d.localName && d.localName.toLowerCase() === lang) ||
-	                (d.nativeName && d.nativeName.toLowerCase() === lang);
+	      context.overwrite(function actionUpdateWikidataTags(graph) {
+	        actions.forEach(function (action) {
+	          graph = action(graph);
 	        });
-	        if (language) { lang = language.code; }
+	        return graph;
+	      }, context.history().undoAnnotation()); // do not dispatch.call('change') here, because entity_editor
+	      // changeTags() is not intended to be called asynchronously
+	    });
+	  }
 
-	        if (d.lang && d.lang !== lang) {
-	            tags[key(d.lang)] = undefined;
-	        }
+	  wiki.tags = function (tags) {
+	    _tags = tags;
+	    updateForTags(tags);
+	  };
 
-	        var newKey = lang && context.cleanTagKey(key(lang));
+	  function updateForTags(tags) {
+	    var value = typeof tags[field.key] === 'string' ? tags[field.key] : ''; // Expect tag format of `tagLang:tagArticleTitle`, e.g. `fr:Paris`, with
+	    // optional suffix of `#anchor`
 
-	        var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));
+	    var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
+	    var tagLang = m && m[1];
+	    var tagArticleTitle = m && m[2];
+	    var anchor = m && m[3];
 
-	        if (newKey && value) {
-	            tags[newKey] = value;
-	        } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
-	            tags[newKey] = _wikiTitles[d.lang];
-	        }
+	    var tagLangInfo = tagLang && _dataWikipedia.find(function (d) {
+	      return tagLang === d[2];
+	    }); // value in correct format
 
-	        d.lang = lang;
-	        dispatch$1.call('change', this, tags);
-	    }
 
+	    if (tagLangInfo) {
+	      var nativeLangName = tagLangInfo[1];
+	      utilGetSetValue(_langInput, nativeLangName);
+	      utilGetSetValue(_titleInput, tagArticleTitle + (anchor ? '#' + anchor : ''));
 
-	    function changeValue(d) {
-	        if (!d.lang) { return; }
-	        var value = context.cleanTagValue(utilGetSetValue(select(this))) || undefined;
+	      if (anchor) {
+	        try {
+	          // Best-effort `anchorencode:` implementation
+	          anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
+	        } catch (e) {
+	          anchor = anchor.replace(/ /g, '_');
+	        }
+	      }
 
-	        // don't override multiple values with blank string
-	        if (!value && Array.isArray(d.value)) { return; }
+	      _wikiURL = 'https://' + tagLang + '.wikipedia.org/wiki/' + tagArticleTitle.replace(/ /g, '_') + (anchor ? '#' + anchor : ''); // unrecognized value format
+	    } else {
+	      utilGetSetValue(_titleInput, value);
 
-	        var t = {};
-	        t[key(d.lang)] = value;
-	        d.value = value;
-	        dispatch$1.call('change', this, t);
+	      if (value && value !== '') {
+	        utilGetSetValue(_langInput, '');
+	        var defaultLangInfo = defaultLanguageInfo();
+	        _wikiURL = "https://".concat(defaultLangInfo[2], ".wikipedia.org/w/index.php?fulltext=1&search=").concat(value);
+	      } else {
+	        var shownOrDefaultLangInfo = language(true
+	        /* skipEnglishFallback */
+	        );
+	        utilGetSetValue(_langInput, shownOrDefaultLangInfo[1]);
+	        _wikiURL = '';
+	      }
 	    }
+	  }
+
+	  wiki.entityIDs = function (val) {
+	    if (!_arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return wiki;
+	  };
 
+	  wiki.focus = function () {
+	    _titleInput.node().focus();
+	  };
 
-	    function fetchLanguages(value, cb) {
-	        var v = value.toLowerCase();
+	  return utilRebind(wiki, dispatch, 'on');
+	}
+	uiFieldWikipedia.supportsMultiselection = false;
 
-	        // show the user's language first
-	        var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
+	var uiFields = {
+	  access: uiFieldAccess,
+	  address: uiFieldAddress,
+	  check: uiFieldCheck,
+	  combo: uiFieldCombo,
+	  cycleway: uiFieldCycleway,
+	  defaultCheck: uiFieldCheck,
+	  email: uiFieldText,
+	  identifier: uiFieldText,
+	  lanes: uiFieldLanes,
+	  localized: uiFieldLocalized,
+	  roadheight: uiFieldRoadheight,
+	  roadspeed: uiFieldRoadspeed,
+	  manyCombo: uiFieldCombo,
+	  multiCombo: uiFieldCombo,
+	  networkCombo: uiFieldCombo,
+	  number: uiFieldText,
+	  onewayCheck: uiFieldCheck,
+	  radio: uiFieldRadio,
+	  restrictions: uiFieldRestrictions,
+	  semiCombo: uiFieldCombo,
+	  structureRadio: uiFieldRadio,
+	  tel: uiFieldText,
+	  text: uiFieldText,
+	  textarea: uiFieldTextarea,
+	  typeCombo: uiFieldCombo,
+	  url: uiFieldText,
+	  wikidata: uiFieldWikidata,
+	  wikipedia: uiFieldWikipedia
+	};
 
-	        if (_countryCode && _territoryLanguages[_countryCode]) {
-	            langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
-	        }
+	function uiField(context, presetField, entityIDs, options) {
+	  options = Object.assign({
+	    show: true,
+	    wrap: true,
+	    remove: true,
+	    revert: true,
+	    info: true
+	  }, options);
+	  var dispatch = dispatch$8('change', 'revert');
+	  var field = Object.assign({}, presetField); // shallow copy
 
-	        var langItems = [];
-	        langCodes.forEach(function(code) {
-	            var langItem = _languagesArray.find(function(item) {
-	                return item.code === code;
-	            });
-	            if (langItem) { langItems.push(langItem); }
-	        });
-	        langItems = utilArrayUniq(langItems.concat(_languagesArray));
-
-	        cb(langItems.filter(function(d) {
-	            return d.label.toLowerCase().indexOf(v) >= 0 ||
-	                (d.localName && d.localName.toLowerCase().indexOf(v) >= 0) ||
-	                (d.nativeName && d.nativeName.toLowerCase().indexOf(v) >= 0) ||
-	                d.code.toLowerCase().indexOf(v) >= 0;
-	        }).map(function(d) {
-	            return { value: d.label };
-	        }));
-	    }
+	  field.domId = utilUniqueDomId('form-field-' + field.safeid);
+	  var _show = options.show;
+	  var _state = '';
+	  var _tags = {};
 
+	  var _entityExtent;
 
-	    function renderMultilingual(selection) {
-	        var entries = selection.selectAll('div.entry')
-	            .data(_multilingual, function(d) { return d.lang; });
+	  if (entityIDs && entityIDs.length) {
+	    _entityExtent = entityIDs.reduce(function (extent, entityID) {
+	      var entity = context.graph().entity(entityID);
+	      return extent.extend(entity.extent(context.graph()));
+	    }, geoExtent());
+	  }
 
-	        entries.exit()
-	            .style('top', '0')
-	            .style('max-height', '240px')
-	            .transition()
-	            .duration(200)
-	            .style('opacity', '0')
-	            .style('max-height', '0px')
-	            .remove();
+	  var _locked = false;
 
-	        var entriesEnter = entries.enter()
-	            .append('div')
-	            .attr('class', 'entry')
-	            .each(function(_, index) {
-	                var wrap = select(this);
-
-	                var domId = utilUniqueDomId(index);
-
-	                var label = wrap
-	                    .append('label')
-	                    .attr('class', 'field-label')
-	                    .attr('for', domId);
-
-	                var text = label
-	                    .append('span')
-	                    .attr('class', 'label-text');
-
-	                text
-	                    .append('span')
-	                    .attr('class', 'label-textvalue')
-	                    .text(_t('translate.localized_translation_label'));
-
-	                text
-	                    .append('span')
-	                    .attr('class', 'label-textannotation');
-
-	                label
-	                    .append('button')
-	                    .attr('class', 'remove-icon-multilingual')
-	                    .on('click', function(d, index) {
-	                        if (field.locked()) { return; }
-	                        event.preventDefault();
-
-	                        if (!d.lang || !d.value) {
-	                            _multilingual.splice(index, 1);
-	                            renderMultilingual(selection);
-	                        } else {
-	                            // remove from entity tags
-	                            var t = {};
-	                            t[key(d.lang)] = undefined;
-	                            dispatch$1.call('change', this, t);
-	                        }
-
-	                    })
-	                    .call(svgIcon('#iD-operation-delete'));
-
-	                wrap
-	                    .append('input')
-	                    .attr('class', 'localized-lang')
-	                    .attr('id', domId)
-	                    .attr('type', 'text')
-	                    .attr('placeholder', _t('translate.localized_translation_language'))
-	                    .on('blur', changeLang)
-	                    .on('change', changeLang)
-	                    .call(langCombo);
-
-	                wrap
-	                    .append('input')
-	                    .attr('type', 'text')
-	                    .attr('class', 'localized-value')
-	                    .on('blur', changeValue)
-	                    .on('change', changeValue);
-	            });
+	  var _lockedTip = uiTooltip().title(_t.html('inspector.lock.suggestion', {
+	    label: field.label
+	  })).placement('bottom');
 
-	        entriesEnter
-	            .style('margin-top', '0px')
-	            .style('max-height', '0px')
-	            .style('opacity', '0')
-	            .transition()
-	            .duration(200)
-	            .style('margin-top', '10px')
-	            .style('max-height', '240px')
-	            .style('opacity', '1')
-	            .on('end', function() {
-	                select(this)
-	                    .style('max-height', '')
-	                    .style('overflow', 'visible');
-	            });
+	  field.keys = field.keys || [field.key]; // only create the fields that are actually being shown
 
-	        entries = entries.merge(entriesEnter);
+	  if (_show && !field.impl) {
+	    createField();
+	  } // Creates the field.. This is done lazily,
+	  // once we know that the field will be shown.
 
-	        entries.order();
 
-	        entries.classed('present', function(d) {
-	            return d.lang && d.value;
-	        });
+	  function createField() {
+	    field.impl = uiFields[field.type](field, context).on('change', function (t, onInput) {
+	      dispatch.call('change', field, t, onInput);
+	    });
 
-	        utilGetSetValue(entries.select('.localized-lang'), function(d) {
-	            return _mainLocalizer.languageName(d.lang);
-	        });
+	    if (entityIDs) {
+	      field.entityIDs = entityIDs; // if this field cares about the entities, pass them along
 
-	        utilGetSetValue(entries.select('.localized-value'), function(d) {
-	                return typeof d.value === 'string' ? d.value : '';
-	            })
-	            .attr('title', function(d) {
-	                return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : null;
-	            })
-	            .attr('placeholder', function(d) {
-	                return Array.isArray(d.value) ? _t('inspector.multiple_values') : _t('translate.localized_translation_name');
-	            })
-	            .classed('mixed', function(d) {
-	                return Array.isArray(d.value);
-	            });
+	      if (field.impl.entityIDs) {
+	        field.impl.entityIDs(entityIDs);
+	      }
 	    }
+	  }
 
+	  function isModified() {
+	    if (!entityIDs || !entityIDs.length) return false;
+	    return entityIDs.some(function (entityID) {
+	      var original = context.graph().base().entities[entityID];
+	      var latest = context.graph().entity(entityID);
+	      return field.keys.some(function (key) {
+	        return original ? latest.tags[key] !== original.tags[key] : latest.tags[key];
+	      });
+	    });
+	  }
 
-	    localized.tags = function(tags) {
-	        _tags = tags;
-
-	        // Fetch translations from wikipedia
-	        if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
-	            _wikiTitles = {};
-	            var wm = tags.wikipedia.match(/([^:]+):(.+)/);
-	            if (wm && wm[0] && wm[1]) {
-	                wikipedia.translations(wm[1], wm[2], function(err, d) {
-	                    if (err || !d) { return; }
-	                    _wikiTitles = d;
-	                });
-	            }
+	  function tagsContainFieldKey() {
+	    return field.keys.some(function (key) {
+	      if (field.type === 'multiCombo') {
+	        for (var tagKey in _tags) {
+	          if (tagKey.indexOf(key) === 0) {
+	            return true;
+	          }
 	        }
 
-	        var isMixed = Array.isArray(tags[field.key]);
-
-	        utilGetSetValue(input, typeof tags[field.key] === 'string' ? tags[field.key] : '')
-	            .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined)
-	            .attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder())
-	            .classed('mixed', isMixed);
-
-	        calcMultilingual(tags);
-
-	        _selection
-	            .call(localized);
-	    };
+	        return false;
+	      }
 
+	      return _tags[key] !== undefined;
+	    });
+	  }
 
-	    localized.focus = function() {
-	        input.node().focus();
-	    };
+	  function revert(d3_event, d) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	    if (!entityIDs || _locked) return;
+	    dispatch.call('revert', d, d.keys);
+	  }
 
+	  function remove(d3_event, d) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	    if (_locked) return;
+	    var t = {};
+	    d.keys.forEach(function (key) {
+	      t[key] = undefined;
+	    });
+	    dispatch.call('change', d, t);
+	  }
 
-	    localized.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        _multilingual = [];
-	        loadCountryCode();
-	        return localized;
-	    };
+	  field.render = function (selection) {
+	    var container = selection.selectAll('.form-field').data([field]); // Enter
 
-	    function loadCountryCode() {
-	        var extent = combinedEntityExtent();
-	        var countryCode = extent && iso1A2Code(extent.center());
-	        _countryCode = countryCode && countryCode.toLowerCase();
-	    }
+	    var enter = container.enter().append('div').attr('class', function (d) {
+	      return 'form-field form-field-' + d.safeid;
+	    }).classed('nowrap', !options.wrap);
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-	    }
+	    if (options.wrap) {
+	      var labelEnter = enter.append('label').attr('class', 'field-label').attr('for', function (d) {
+	        return d.domId;
+	      });
+	      var textEnter = labelEnter.append('span').attr('class', 'label-text');
+	      textEnter.append('span').attr('class', 'label-textvalue').html(function (d) {
+	        return d.label();
+	      });
+	      textEnter.append('span').attr('class', 'label-textannotation');
 
-	    return utilRebind(localized, dispatch$1, 'on');
-	}
+	      if (options.remove) {
+	        labelEnter.append('button').attr('class', 'remove-icon').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete'));
+	      }
 
-	function uiFieldMaxspeed(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var unitInput = select(null);
-	    var input = select(null);
-	    var _entityIDs = [];
-	    var _tags;
-	    var _isImperial;
+	      if (options.revert) {
+	        labelEnter.append('button').attr('class', 'modified-icon').attr('title', _t('icons.undo')).call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo'));
+	      }
+	    } // Update
 
-	    var speedCombo = uiCombobox(context, 'maxspeed');
-	    var unitCombo = uiCombobox(context, 'maxspeed-unit')
-	            .data(['km/h', 'mph'].map(comboValues));
 
-	    var metricValues = [20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120];
-	    var imperialValues = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80];
+	    container = container.merge(enter);
+	    container.select('.field-label > .remove-icon') // propagate bound data
+	    .on('click', remove);
+	    container.select('.field-label > .modified-icon') // propagate bound data
+	    .on('click', revert);
+	    container.each(function (d) {
+	      var selection = select(this);
 
+	      if (!d.impl) {
+	        createField();
+	      }
 
-	    function maxspeed(selection) {
+	      var reference, help; // instantiate field help
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	      if (options.wrap && field.type === 'restrictions') {
+	        help = uiFieldHelp(context, 'restrictions');
+	      } // instantiate tag reference
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
 
+	      if (options.wrap && options.info) {
+	        var referenceKey = d.key || '';
 
-	        input = wrap.selectAll('input.maxspeed-number')
-	            .data([0]);
+	        if (d.type === 'multiCombo') {
+	          // lookup key without the trailing ':'
+	          referenceKey = referenceKey.replace(/:$/, '');
+	        }
 
-	        input = input.enter()
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', 'maxspeed-number')
-	            .attr('id', field.domId)
-	            .call(utilNoAuto)
-	            .call(speedCombo)
-	            .merge(input);
+	        reference = uiTagReference(d.reference || {
+	          key: referenceKey
+	        });
 
-	        input
-	            .on('change', change)
-	            .on('blur', change);
+	        if (_state === 'hover') {
+	          reference.showing(false);
+	        }
+	      }
 
-	        var loc = combinedEntityExtent().center();
-	        _isImperial = roadSpeedUnit(loc) === 'mph';
+	      selection.call(d.impl); // add field help components
 
-	        unitInput = wrap.selectAll('input.maxspeed-unit')
-	            .data([0]);
+	      if (help) {
+	        selection.call(help.body).select('.field-label').call(help.button);
+	      } // add tag reference components
 
-	        unitInput = unitInput.enter()
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', 'maxspeed-unit')
-	            .call(unitCombo)
-	            .merge(unitInput);
 
-	        unitInput
-	            .on('blur', changeUnits)
-	            .on('change', changeUnits);
+	      if (reference) {
+	        selection.call(reference.body).select('.field-label').call(reference.button);
+	      }
 
+	      d.impl.tags(_tags);
+	    });
+	    container.classed('locked', _locked).classed('modified', isModified()).classed('present', tagsContainFieldKey()); // show a tip and lock icon if the field is locked
 
-	        function changeUnits() {
-	            _isImperial = utilGetSetValue(unitInput) === 'mph';
-	            utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
-	            setUnitSuggestions();
-	            change();
-	        }
-	    }
+	    var annotation = container.selectAll('.field-label .label-textannotation');
+	    var icon = annotation.selectAll('.icon').data(_locked ? [0] : []);
+	    icon.exit().remove();
+	    icon.enter().append('svg').attr('class', 'icon').append('use').attr('xlink:href', '#fas-lock');
+	    container.call(_locked ? _lockedTip : _lockedTip.destroy);
+	  };
 
+	  field.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return field;
+	  };
 
-	    function setUnitSuggestions() {
-	        speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
-	        utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
-	    }
+	  field.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val;
 
+	    if (tagsContainFieldKey() && !_show) {
+	      // always show a field if it has a value to display
+	      _show = true;
 
-	    function comboValues(d) {
-	        return {
-	            value: d.toString(),
-	            title: d.toString()
-	        };
+	      if (!field.impl) {
+	        createField();
+	      }
 	    }
 
+	    return field;
+	  };
 
-	    function change() {
-	        var tag = {};
-	        var value = utilGetSetValue(input).trim();
-
-	        // don't override multiple values with blank string
-	        if (!value && Array.isArray(_tags[field.key])) { return; }
+	  field.locked = function (val) {
+	    if (!arguments.length) return _locked;
+	    _locked = val;
+	    return field;
+	  };
 
-	        if (!value) {
-	            tag[field.key] = undefined;
-	        } else if (isNaN(value) || !_isImperial) {
-	            tag[field.key] = context.cleanTagValue(value);
-	        } else {
-	            tag[field.key] = context.cleanTagValue(value + ' mph');
-	        }
+	  field.show = function () {
+	    _show = true;
 
-	        dispatch$1.call('change', this, tag);
+	    if (!field.impl) {
+	      createField();
 	    }
 
+	    if (field["default"] && field.key && _tags[field.key] !== field["default"]) {
+	      var t = {};
+	      t[field.key] = field["default"];
+	      dispatch.call('change', this, t);
+	    }
+	  }; // A shown field has a visible UI, a non-shown field is in the 'Add field' dropdown
 
-	    maxspeed.tags = function(tags) {
-	        _tags = tags;
 
-	        var value = tags[field.key];
-	        var isMixed = Array.isArray(value);
+	  field.isShown = function () {
+	    return _show;
+	  }; // An allowed field can appear in the UI or in the 'Add field' dropdown.
+	  // A non-allowed field is hidden from the user altogether
 
-	        if (!isMixed) {
-	            if (value && value.indexOf('mph') >= 0) {
-	                value = parseInt(value, 10).toString();
-	                _isImperial = true;
-	            } else if (value) {
-	                _isImperial = false;
-	            }
-	        }
 
-	        setUnitSuggestions();
+	  field.isAllowed = function () {
+	    if (entityIDs && entityIDs.length > 1 && uiFields[field.type].supportsMultiselection === false) return false;
+	    if (field.geometry && !entityIDs.every(function (entityID) {
+	      return field.matchGeometry(context.graph().geometry(entityID));
+	    })) return false;
 
-	        utilGetSetValue(input, typeof value === 'string' ? value : '')
-	            .attr('title', isMixed ? value.filter(Boolean).join('\n') : null)
-	            .attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder())
-	            .classed('mixed', isMixed);
-	    };
+	    if (entityIDs && _entityExtent && field.locationSetID) {
+	      // is field allowed in this location?
+	      var validLocations = _mainLocations.locationsAt(_entityExtent.center());
+	      if (!validLocations[field.locationSetID]) return false;
+	    }
 
+	    var prerequisiteTag = field.prerequisiteTag;
 
-	    maxspeed.focus = function() {
-	        input.node().focus();
-	    };
+	    if (entityIDs && !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
+	    prerequisiteTag) {
+	      if (!entityIDs.every(function (entityID) {
+	        var entity = context.graph().entity(entityID);
 
+	        if (prerequisiteTag.key) {
+	          var value = entity.tags[prerequisiteTag.key];
+	          if (!value) return false;
 
-	    maxspeed.entityIDs = function(val) {
-	        _entityIDs = val;
-	    };
+	          if (prerequisiteTag.valueNot) {
+	            return prerequisiteTag.valueNot !== value;
+	          }
 
+	          if (prerequisiteTag.value) {
+	            return prerequisiteTag.value === value;
+	          }
+	        } else if (prerequisiteTag.keyNot) {
+	          if (entity.tags[prerequisiteTag.keyNot]) return false;
+	        }
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	        return true;
+	      })) return false;
 	    }
 
+	    return true;
+	  };
 
-	    return utilRebind(maxspeed, dispatch$1, 'on');
-	}
-
-	function uiFieldRadio(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var placeholder = select(null);
-	    var wrap = select(null);
-	    var labels = select(null);
-	    var radios = select(null);
-	    var radioData = (field.options || (field.strings && field.strings.options && Object.keys(field.strings.options)) || field.keys).slice();  // shallow copy
-	    var typeField;
-	    var layerField;
-	    var _oldType = {};
-	    var _entityIDs = [];
-
-
-	    function selectedKey() {
-	        var node = wrap.selectAll('.form-field-input-radio label.active input');
-	        return !node.empty() && node.datum();
+	  field.focus = function () {
+	    if (field.impl) {
+	      field.impl.focus();
 	    }
+	  };
 
+	  return utilRebind(field, dispatch, 'on');
+	}
+
+	function uiFormFields(context) {
+	  var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
+	  var _fieldsArr = [];
+	  var _lastPlaceholder = '';
+	  var _state = '';
+	  var _klass = '';
+
+	  function formFields(selection) {
+	    var allowedFields = _fieldsArr.filter(function (field) {
+	      return field.isAllowed();
+	    });
 
-	    function radio(selection) {
-	        selection.classed('preset-radio', true);
+	    var shown = allowedFields.filter(function (field) {
+	      return field.isShown();
+	    });
+	    var notShown = allowedFields.filter(function (field) {
+	      return !field.isShown();
+	    });
+	    var container = selection.selectAll('.form-fields-container').data([0]);
+	    container = container.enter().append('div').attr('class', 'form-fields-container ' + (_klass || '')).merge(container);
+	    var fields = container.selectAll('.wrap-form-field').data(shown, function (d) {
+	      return d.id + (d.entityIDs ? d.entityIDs.join() : '');
+	    });
+	    fields.exit().remove(); // Enter
 
-	        wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    var enter = fields.enter().append('div').attr('class', function (d) {
+	      return 'wrap-form-field wrap-form-field-' + d.safeid;
+	    }); // Update
 
-	        var enter = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-radio');
+	    fields = fields.merge(enter);
+	    fields.order().each(function (d) {
+	      select(this).call(d.render);
+	    });
+	    var titles = [];
+	    var moreFields = notShown.map(function (field) {
+	      var title = field.title();
+	      titles.push(title);
+	      var terms = field.terms();
+	      if (field.key) terms.push(field.key);
+	      if (field.keys) terms = terms.concat(field.keys);
+	      return {
+	        display: field.label(),
+	        value: title,
+	        title: title,
+	        field: field,
+	        terms: terms
+	      };
+	    });
+	    var placeholder = titles.slice(0, 3).join(', ') + (titles.length > 3 ? '…' : '');
+	    var more = selection.selectAll('.more-fields').data(_state === 'hover' || moreFields.length === 0 ? [] : [0]);
+	    more.exit().remove();
+	    var moreEnter = more.enter().append('div').attr('class', 'more-fields').append('label');
+	    moreEnter.append('span').call(_t.append('inspector.add_fields'));
+	    more = moreEnter.merge(more);
+	    var input = more.selectAll('.value').data([0]);
+	    input.exit().remove();
+	    input = input.enter().append('input').attr('class', 'value').attr('type', 'text').attr('placeholder', placeholder).call(utilNoAuto).merge(input);
+	    input.call(utilGetSetValue, '').call(moreCombo.data(moreFields).on('accept', function (d) {
+	      if (!d) return; // user entered something that was not matched
+
+	      var field = d.field;
+	      field.show();
+	      selection.call(formFields); // rerender
+
+	      field.focus();
+	    })); // avoid updating placeholder excessively (triggers style recalc)
+
+	    if (_lastPlaceholder !== placeholder) {
+	      input.attr('placeholder', placeholder);
+	      _lastPlaceholder = placeholder;
+	    }
+	  }
+
+	  formFields.fieldsArr = function (val) {
+	    if (!arguments.length) return _fieldsArr;
+	    _fieldsArr = val || [];
+	    return formFields;
+	  };
 
-	        enter
-	            .append('span')
-	            .attr('class', 'placeholder');
+	  formFields.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return formFields;
+	  };
 
-	        wrap = wrap
-	            .merge(enter);
+	  formFields.klass = function (val) {
+	    if (!arguments.length) return _klass;
+	    _klass = val;
+	    return formFields;
+	  };
 
+	  return formFields;
+	}
 
-	        placeholder = wrap.selectAll('.placeholder');
+	function uiChangesetEditor(context) {
+	  var dispatch = dispatch$8('change');
+	  var formFields = uiFormFields(context);
+	  var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);
 
-	        labels = wrap.selectAll('label')
-	            .data(radioData);
+	  var _fieldsArr;
 
-	        enter = labels.enter()
-	            .append('label');
+	  var _tags;
 
-	        enter
-	            .append('input')
-	            .attr('type', 'radio')
-	            .attr('name', field.id)
-	            .attr('value', function(d) { return field.t('options.' + d, { 'default': d }); })
-	            .attr('checked', false);
+	  var _changesetID;
 
-	        enter
-	            .append('span')
-	            .text(function(d) { return field.t('options.' + d, { 'default': d }); });
+	  function changesetEditor(selection) {
+	    render(selection);
+	  }
 
-	        labels = labels
-	            .merge(enter);
+	  function render(selection) {
+	    var initial = false;
 
-	        radios = labels.selectAll('input')
-	            .on('change', changeRadio);
+	    if (!_fieldsArr) {
+	      initial = true;
+	      var presets = _mainPresetIndex;
+	      _fieldsArr = [uiField(context, presets.field('comment'), null, {
+	        show: true,
+	        revert: false
+	      }), uiField(context, presets.field('source'), null, {
+	        show: false,
+	        revert: false
+	      }), uiField(context, presets.field('hashtags'), null, {
+	        show: false,
+	        revert: false
+	      })];
 
+	      _fieldsArr.forEach(function (field) {
+	        field.on('change', function (t, onInput) {
+	          dispatch.call('change', field, undefined, t, onInput);
+	        });
+	      });
 	    }
 
+	    _fieldsArr.forEach(function (field) {
+	      field.tags(_tags);
+	    });
+
+	    selection.call(formFields.fieldsArr(_fieldsArr));
+
+	    if (initial) {
+	      var commentField = selection.select('.form-field-comment textarea');
+	      var commentNode = commentField.node();
+
+	      if (commentNode) {
+	        commentNode.focus();
+	        commentNode.select();
+	      } // trigger a 'blur' event so that comment field can be cleaned
+	      // and checked for hashtags, even if retrieved from localstorage
+
+
+	      utilTriggerEvent(commentField, 'blur');
+	      var osm = context.connection();
+
+	      if (osm) {
+	        osm.userChangesets(function (err, changesets) {
+	          if (err) return;
+	          var comments = changesets.map(function (changeset) {
+	            var comment = changeset.tags.comment;
+	            return comment ? {
+	              title: comment,
+	              value: comment
+	            } : null;
+	          }).filter(Boolean);
+	          commentField.call(commentCombo.data(utilArrayUniqBy(comments, 'title')));
+	        });
+	      }
+	    } // Add warning if comment mentions Google
 
-	    function structureExtras(selection, tags) {
-	        var selected = selectedKey() || tags.layer !== undefined;
-	        var type = _mainPresetIndex.field(selected);
-	        var layer = _mainPresetIndex.field('layer');
-	        var showLayer = (selected === 'bridge' || selected === 'tunnel' || tags.layer !== undefined);
 
+	    var hasGoogle = _tags.comment.match(/google/i);
 
-	        var extrasWrap = selection.selectAll('.structure-extras-wrap')
-	            .data(selected ? [0] : []);
+	    var commentWarning = selection.select('.form-field-comment').selectAll('.comment-warning').data(hasGoogle ? [0] : []);
+	    commentWarning.exit().transition().duration(200).style('opacity', 0).remove();
+	    var commentEnter = commentWarning.enter().insert('div', '.tag-reference-body').attr('class', 'field-warning comment-warning').style('opacity', 0);
+	    commentEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-alert', 'inline')).attr('href', _t('commit.google_warning_link')).append('span').call(_t.append('commit.google_warning'));
+	    commentEnter.transition().duration(200).style('opacity', 1);
+	  }
 
-	        extrasWrap.exit()
-	            .remove();
+	  changesetEditor.tags = function (_) {
+	    if (!arguments.length) return _tags;
+	    _tags = _; // Don't reset _fieldsArr here.
 
-	        extrasWrap = extrasWrap.enter()
-	            .append('div')
-	            .attr('class', 'structure-extras-wrap')
-	            .merge(extrasWrap);
+	    return changesetEditor;
+	  };
 
-	        var list = extrasWrap.selectAll('ul')
-	            .data([0]);
+	  changesetEditor.changesetID = function (_) {
+	    if (!arguments.length) return _changesetID;
+	    if (_changesetID === _) return changesetEditor;
+	    _changesetID = _;
+	    _fieldsArr = null;
+	    return changesetEditor;
+	  };
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'rows')
-	            .merge(list);
+	  return utilRebind(changesetEditor, dispatch, 'on');
+	}
 
+	var JXON = new function () {
+	  var sValueProp = 'keyValue',
+	      sAttributesProp = 'keyAttributes',
+	      sAttrPref = '@',
 
-	        // Type
-	        if (type) {
-	            if (!typeField || typeField.id !== selected) {
-	                typeField = uiField(context, type, _entityIDs, { wrap: false })
-	                    .on('change', changeType);
-	            }
-	            typeField.tags(tags);
-	        } else {
-	            typeField = null;
-	        }
+	  /* you can customize these values */
+	  aCache = [],
+	      rIsNull = /^\s*$/,
+	      rIsBool = /^(?:true|false)$/i;
 
-	        var typeItem = list.selectAll('.structure-type-item')
-	            .data(typeField ? [typeField] : [], function(d) { return d.id; });
+	  function parseText(sValue) {
+	    if (rIsNull.test(sValue)) {
+	      return null;
+	    }
 
-	        // Exit
-	        typeItem.exit()
-	            .remove();
+	    if (rIsBool.test(sValue)) {
+	      return sValue.toLowerCase() === 'true';
+	    }
 
-	        // Enter
-	        var typeEnter = typeItem.enter()
-	            .insert('li', ':first-child')
-	            .attr('class', 'labeled-input structure-type-item');
+	    if (isFinite(sValue)) {
+	      return parseFloat(sValue);
+	    }
 
-	        typeEnter
-	            .append('span')
-	            .attr('class', 'label structure-label-type')
-	            .attr('for', 'preset-input-' + selected)
-	            .text(_t('inspector.radio.structure.type'));
+	    if (isFinite(Date.parse(sValue))) {
+	      return new Date(sValue);
+	    }
 
-	        typeEnter
-	            .append('div')
-	            .attr('class', 'structure-input-type-wrap');
+	    return sValue;
+	  }
 
-	        // Update
-	        typeItem = typeItem
-	            .merge(typeEnter);
+	  function EmptyTree() {}
 
-	        if (typeField) {
-	            typeItem.selectAll('.structure-input-type-wrap')
-	                .call(typeField.render);
-	        }
+	  EmptyTree.prototype.toString = function () {
+	    return 'null';
+	  };
 
+	  EmptyTree.prototype.valueOf = function () {
+	    return null;
+	  };
 
-	        // Layer
-	        if (layer && showLayer) {
-	            if (!layerField) {
-	                layerField = uiField(context, layer, _entityIDs, { wrap: false })
-	                    .on('change', changeLayer);
-	            }
-	            layerField.tags(tags);
-	            field.keys = utilArrayUnion(field.keys, ['layer']);
-	        } else {
-	            layerField = null;
-	            field.keys = field.keys.filter(function(k) { return k !== 'layer'; });
-	        }
+	  function objectify(vValue) {
+	    return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
+	  }
 
-	        var layerItem = list.selectAll('.structure-layer-item')
-	            .data(layerField ? [layerField] : []);
+	  function createObjTree(oParentNode, nVerb, bFreeze, bNesteAttr) {
+	    var nLevelStart = aCache.length,
+	        bChildren = oParentNode.hasChildNodes(),
+	        bAttributes = oParentNode.hasAttributes(),
+	        bHighVerb = Boolean(nVerb & 2);
+	    var sProp,
+	        vContent,
+	        nLength = 0,
+	        sCollectedTxt = '',
+	        vResult = bHighVerb ? {} :
+	    /* put here the default value for empty nodes: */
+	    true;
 
-	        // Exit
-	        layerItem.exit()
-	            .remove();
+	    if (bChildren) {
+	      for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
+	        oNode = oParentNode.childNodes.item(nItem);
 
-	        // Enter
-	        var layerEnter = layerItem.enter()
-	            .append('li')
-	            .attr('class', 'labeled-input structure-layer-item');
+	        if (oNode.nodeType === 4) {
+	          /* nodeType is 'CDATASection' (4) */
+	          sCollectedTxt += oNode.nodeValue;
+	        } else if (oNode.nodeType === 3) {
+	          /* nodeType is 'Text' (3) */
+	          sCollectedTxt += oNode.nodeValue.trim();
+	        } else if (oNode.nodeType === 1 && !oNode.prefix) {
+	          /* nodeType is 'Element' (1) */
+	          aCache.push(oNode);
+	        }
+	      }
+	    }
 
-	        layerEnter
-	            .append('span')
-	            .attr('class', 'label structure-label-layer')
-	            .attr('for', 'preset-input-layer')
-	            .text(_t('inspector.radio.structure.layer'));
+	    var nLevelEnd = aCache.length,
+	        vBuiltVal = parseText(sCollectedTxt);
 
-	        layerEnter
-	            .append('div')
-	            .attr('class', 'structure-input-layer-wrap');
+	    if (!bHighVerb && (bChildren || bAttributes)) {
+	      vResult = nVerb === 0 ? objectify(vBuiltVal) : {};
+	    }
 
-	        // Update
-	        layerItem = layerItem
-	            .merge(layerEnter);
+	    for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
+	      sProp = aCache[nElId].nodeName.toLowerCase();
+	      vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
 
-	        if (layerField) {
-	            layerItem.selectAll('.structure-input-layer-wrap')
-	                .call(layerField.render);
+	      if (vResult.hasOwnProperty(sProp)) {
+	        if (vResult[sProp].constructor !== Array) {
+	          vResult[sProp] = [vResult[sProp]];
 	        }
+
+	        vResult[sProp].push(vContent);
+	      } else {
+	        vResult[sProp] = vContent;
+	        nLength++;
+	      }
 	    }
 
+	    if (bAttributes) {
+	      var nAttrLen = oParentNode.attributes.length,
+	          sAPrefix = bNesteAttr ? '' : sAttrPref,
+	          oAttrParent = bNesteAttr ? {} : vResult;
 
-	    function changeType(t, onInput) {
-	        var key = selectedKey();
-	        if (!key) { return; }
+	      for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
+	        oAttrib = oParentNode.attributes.item(nAttrib);
+	        oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
+	      }
 
-	        var val = t[key];
-	        if (val !== 'no') {
-	            _oldType[key] = val;
+	      if (bNesteAttr) {
+	        if (bFreeze) {
+	          Object.freeze(oAttrParent);
 	        }
 
-	        if (field.type === 'structureRadio') {
-	            // remove layer if it should not be set
-	            if (val === 'no' ||
-	                (key !== 'bridge' && key !== 'tunnel') ||
-	                (key === 'tunnel' && val === 'building_passage')) {
-	                t.layer = undefined;
-	            }
-	            // add layer if it should be set
-	            if (t.layer === undefined) {
-	                if (key === 'bridge' && val !== 'no') {
-	                    t.layer = '1';
-	                }
-	                if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
-	                    t.layer = '-1';
-	                }
-	            }
-	         }
-
-	        dispatch$1.call('change', this, t, onInput);
+	        vResult[sAttributesProp] = oAttrParent;
+	        nLength -= nAttrLen - 1;
+	      }
 	    }
 
+	    if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
+	      vResult[sValueProp] = vBuiltVal;
+	    } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
+	      vResult = vBuiltVal;
+	    }
 
-	    function changeLayer(t, onInput) {
-	        if (t.layer === '0') {
-	            t.layer = undefined;
-	        }
-	        dispatch$1.call('change', this, t, onInput);
+	    if (bFreeze && (bHighVerb || nLength > 0)) {
+	      Object.freeze(vResult);
 	    }
 
+	    aCache.length = nLevelStart;
+	    return vResult;
+	  }
 
-	    function changeRadio() {
-	        var t = {};
-	        var activeKey;
+	  function loadObjTree(oXMLDoc, oParentEl, oParentObj) {
+	    var vValue, oChild;
 
-	        if (field.key) {
-	            t[field.key] = undefined;
-	        }
+	    if (oParentObj instanceof String || oParentObj instanceof Number || oParentObj instanceof Boolean) {
+	      oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toString()));
+	      /* verbosity level is 0 */
+	    } else if (oParentObj.constructor === Date) {
+	      oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toGMTString()));
+	    }
 
-	        radios.each(function(d) {
-	            var active = select(this).property('checked');
-	            if (active) { activeKey = d; }
+	    for (var sName in oParentObj) {
+	      vValue = oParentObj[sName];
 
-	            if (field.key) {
-	                if (active) { t[field.key] = d; }
-	            } else {
-	                var val = _oldType[activeKey] || 'yes';
-	                t[d] = active ? val : undefined;
-	            }
-	        });
+	      if (isFinite(sName) || vValue instanceof Function) {
+	        continue;
+	      }
+	      /* verbosity level is 0 */
 
-	        if (field.type === 'structureRadio') {
-	            if (activeKey === 'bridge') {
-	                t.layer = '1';
-	            } else if (activeKey === 'tunnel' && t.tunnel !== 'building_passage') {
-	                t.layer = '-1';
-	            } else {
-	                t.layer = undefined;
-	            }
-	        }
 
-	        dispatch$1.call('change', this, t);
-	    }
+	      if (sName === sValueProp) {
+	        if (vValue !== null && vValue !== true) {
+	          oParentEl.appendChild(oXMLDoc.createTextNode(vValue.constructor === Date ? vValue.toGMTString() : String(vValue)));
+	        }
+	      } else if (sName === sAttributesProp) {
+	        /* verbosity level is 3 */
+	        for (var sAttrib in vValue) {
+	          oParentEl.setAttribute(sAttrib, vValue[sAttrib]);
+	        }
+	      } else if (sName.charAt(0) === sAttrPref) {
+	        oParentEl.setAttribute(sName.slice(1), vValue);
+	      } else if (vValue.constructor === Array) {
+	        for (var nItem = 0; nItem < vValue.length; nItem++) {
+	          oChild = oXMLDoc.createElement(sName);
+	          loadObjTree(oXMLDoc, oChild, vValue[nItem]);
+	          oParentEl.appendChild(oChild);
+	        }
+	      } else {
+	        oChild = oXMLDoc.createElement(sName);
 
+	        if (vValue instanceof Object) {
+	          loadObjTree(oXMLDoc, oChild, vValue);
+	        } else if (vValue !== null && vValue !== true) {
+	          oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
+	        }
 
-	    radio.tags = function(tags) {
+	        oParentEl.appendChild(oChild);
+	      }
+	    }
+	  }
 
-	        radios.property('checked', function(d) {
-	            if (field.key) {
-	                return tags[field.key] === d;
-	            }
-	            return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
-	        });
+	  this.build = function (oXMLParent, nVerbosity
+	  /* optional */
+	  , bFreeze
+	  /* optional */
+	  , bNesteAttributes
+	  /* optional */
+	  ) {
+	    var _nVerb = arguments.length > 1 && typeof nVerbosity === 'number' ? nVerbosity & 3 :
+	    /* put here the default verbosity level: */
+	    1;
 
-	        function isMixed(d) {
-	            if (field.key) {
-	                return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
-	            }
-	            return Array.isArray(tags[d]);
-	        }
+	    return createObjTree(oXMLParent, _nVerb, bFreeze || false, arguments.length > 3 ? bNesteAttributes : _nVerb === 3);
+	  };
 
-	        labels
-	            .classed('active', function(d) {
-	                if (field.key) {
-	                    return (Array.isArray(tags[field.key]) && tags[field.key].includes(d))
-	                        || tags[field.key] === d;
-	                }
-	                return Array.isArray(tags[d]) || !!(tags[d] && tags[d].toLowerCase() !== 'no');
-	            })
-	            .classed('mixed', isMixed)
-	            .attr('title', function(d) {
-	                return isMixed(d) ? _t('inspector.unshared_value_tooltip') : null;
-	            });
+	  this.unbuild = function (oObjTree) {
+	    var oNewDoc = document.implementation.createDocument('', '', null);
+	    loadObjTree(oNewDoc, oNewDoc, oObjTree);
+	    return oNewDoc;
+	  };
 
+	  this.stringify = function (oObjTree) {
+	    return new XMLSerializer().serializeToString(JXON.unbuild(oObjTree));
+	  };
+	}(); // var myObject = JXON.build(doc);
+	// we got our javascript object! try: alert(JSON.stringify(myObject));
+	// var newDoc = JXON.unbuild(myObject);
+	// we got our Document instance! try: alert((new XMLSerializer()).serializeToString(newDoc));
 
-	        var selection = radios.filter(function() { return this.checked; });
+	function uiSectionChanges(context) {
+	  var detected = utilDetect();
+	  var _discardTags = {};
+	  _mainFileFetcher.get('discarded').then(function (d) {
+	    _discardTags = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  });
+	  var section = uiSection('changes-list', context).label(function () {
+	    var history = context.history();
+	    var summary = history.difference().summary();
+	    return _t.html('inspector.title_count', {
+	      title: {
+	        html: _t.html('commit.changes')
+	      },
+	      count: summary.length
+	    });
+	  }).disclosureContent(renderDisclosureContent);
 
-	        if (selection.empty()) {
-	            placeholder.text(_t('inspector.none'));
-	        } else {
-	            placeholder.text(selection.attr('value'));
-	            _oldType[selection.datum()] = tags[selection.datum()];
-	        }
+	  function renderDisclosureContent(selection) {
+	    var history = context.history();
+	    var summary = history.difference().summary();
+	    var container = selection.selectAll('.commit-section').data([0]);
+	    var containerEnter = container.enter().append('div').attr('class', 'commit-section');
+	    containerEnter.append('ul').attr('class', 'changeset-list');
+	    container = containerEnter.merge(container);
+	    var items = container.select('ul').selectAll('li').data(summary);
+	    var itemsEnter = items.enter().append('li').attr('class', 'change-item');
+	    var buttons = itemsEnter.append('button').on('mouseover', mouseover).on('mouseout', mouseout).on('click', click);
+	    buttons.each(function (d) {
+	      select(this).call(svgIcon('#iD-icon-' + d.entity.geometry(d.graph), 'pre-text ' + d.changeType));
+	    });
+	    buttons.append('span').attr('class', 'change-type').html(function (d) {
+	      return _t.html('commit.' + d.changeType) + ' ';
+	    });
+	    buttons.append('strong').attr('class', 'entity-type').text(function (d) {
+	      var matched = _mainPresetIndex.match(d.entity, d.graph);
+	      return matched && matched.name() || utilDisplayType(d.entity.id);
+	    });
+	    buttons.append('span').attr('class', 'entity-name').text(function (d) {
+	      var name = utilDisplayName(d.entity) || '',
+	          string = '';
 
-	        if (field.type === 'structureRadio') {
-	            // For waterways without a tunnel tag, set 'culvert' as
-	            // the _oldType to default to if the user picks 'tunnel'
-	            if (!!tags.waterway && !_oldType.tunnel) {
-	                _oldType.tunnel = 'culvert';
-	            }
+	      if (name !== '') {
+	        string += ':';
+	      }
 
-	            wrap.call(structureExtras, tags);
-	        }
-	    };
+	      return string += ' ' + name;
+	    });
+	    items = itemsEnter.merge(items); // Download changeset link
 
+	    var changeset = new osmChangeset().update({
+	      id: undefined
+	    });
+	    var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+	    delete changeset.id; // Export without chnageset_id
 
-	    radio.focus = function() {
-	        radios.node().focus();
-	    };
+	    var data = JXON.stringify(changeset.osmChangeJXON(changes));
+	    var blob = new Blob([data], {
+	      type: 'text/xml;charset=utf-8;'
+	    });
+	    var fileName = 'changes.osc';
+	    var linkEnter = container.selectAll('.download-changes').data([0]).enter().append('a').attr('class', 'download-changes');
 
+	    if (detected.download) {
+	      // All except IE11 and Edge
+	      linkEnter // download the data as a file
+	      .attr('href', window.URL.createObjectURL(blob)).attr('download', fileName);
+	    } else {
+	      // IE11 and Edge
+	      linkEnter // open data uri in a new tab
+	      .attr('target', '_blank').on('click.download', function () {
+	        navigator.msSaveBlob(blob, fileName);
+	      });
+	    }
 
-	    radio.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        _oldType = {};
-	        return radio;
-	    };
+	    linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').call(_t.append('commit.download_changes'));
 
+	    function mouseover(d) {
+	      if (d.entity) {
+	        context.surface().selectAll(utilEntityOrMemberSelector([d.entity.id], context.graph())).classed('hover', true);
+	      }
+	    }
 
-	    radio.isAllowed = function() {
-	        return _entityIDs.length === 1;
-	    };
+	    function mouseout() {
+	      context.surface().selectAll('.hover').classed('hover', false);
+	    }
 
+	    function click(d3_event, change) {
+	      if (change.changeType !== 'deleted') {
+	        var entity = change.entity;
+	        context.map().zoomToEase(entity);
+	        context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph())).classed('hover', true);
+	      }
+	    }
+	  }
 
-	    return utilRebind(radio, dispatch$1, 'on');
+	  return section;
 	}
 
-	function uiFieldRestrictions(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var breathe = behaviorBreathe();
-
-	    corePreferences('turn-restriction-via-way', null);                 // remove old key
-	    var storedViaWay = corePreferences('turn-restriction-via-way0');   // use new key #6922
-	    var storedDistance = corePreferences('turn-restriction-distance');
-
-	    var _maxViaWay = storedViaWay !== null ? (+storedViaWay) : 0;
-	    var _maxDistance = storedDistance ? (+storedDistance) : 30;
-	    var _initialized = false;
-	    var _parent = select(null);       // the entire field
-	    var _container = select(null);    // just the map
-	    var _oldTurns;
-	    var _graph;
-	    var _vertexID;
-	    var _intersection;
-	    var _fromWayID;
-
-	    var _lastXPos;
-
-
-	    function restrictions(selection) {
-	        _parent = selection;
-
-	        // try to reuse the intersection, but always rebuild it if the graph has changed
-	        if (_vertexID && (context.graph() !== _graph || !_intersection)) {
-	            _graph = context.graph();
-	            _intersection = osmIntersection(_graph, _vertexID, _maxDistance);
-	        }
-
-	        // It's possible for there to be no actual intersection here.
-	        // for example, a vertex of two `highway=path`
-	        // In this case, hide the field.
-	        var isOK = (
-	            _intersection &&
-	            _intersection.vertices.length &&           // has vertices
-	            _intersection.vertices                     // has the vertex that the user selected
-	                .filter(function(vertex) { return vertex.id === _vertexID; }).length &&
-	            _intersection.ways.length > 2 &&           // has more than 2 ways
-	            _intersection.ways                         // has more than 1 TO way
-	                .filter(function(way) { return way.__to; }).length > 1
-	        );
-
-	        // Also hide in the case where
-	        select(selection.node().parentNode).classed('hide', !isOK);
+	function uiCommitWarnings(context) {
+	  function commitWarnings(selection) {
+	    var issuesBySeverity = context.validator().getIssuesBySeverity({
+	      what: 'edited',
+	      where: 'all',
+	      includeDisabledRules: true
+	    });
 
-	        // if form field is hidden or has detached from dom, clean up.
-	        if (!isOK ||
-	            !context.container().select('.inspector-wrap.inspector-hidden').empty() ||
-	            !selection.node().parentNode ||
-	            !selection.node().parentNode.parentNode) {
-	            selection.call(restrictions.off);
-	            return;
-	        }
+	    for (var severity in issuesBySeverity) {
+	      var issues = issuesBySeverity[severity];
 
+	      if (severity !== 'error') {
+	        // exclude 'fixme' and similar - #8603
+	        issues = issues.filter(function (issue) {
+	          return issue.type !== 'help_request';
+	        });
+	      }
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	      var section = severity + '-section';
+	      var issueItem = severity + '-item';
+	      var container = selection.selectAll('.' + section).data(issues.length ? [0] : []);
+	      container.exit().remove();
+	      var containerEnter = container.enter().append('div').attr('class', 'modal-section ' + section + ' fillL2');
+	      containerEnter.append('h3').html(severity === 'warning' ? _t.html('commit.warnings') : _t.html('commit.errors'));
+	      containerEnter.append('ul').attr('class', 'changeset-list');
+	      container = containerEnter.merge(container);
+	      var items = container.select('ul').selectAll('li').data(issues, function (d) {
+	        return d.key;
+	      });
+	      items.exit().remove();
+	      var itemsEnter = items.enter().append('li').attr('class', issueItem);
+	      var buttons = itemsEnter.append('button').on('mouseover', function (d3_event, d) {
+	        if (d.entityIds) {
+	          context.surface().selectAll(utilEntityOrMemberSelector(d.entityIds, context.graph())).classed('hover', true);
+	        }
+	      }).on('mouseout', function () {
+	        context.surface().selectAll('.hover').classed('hover', false);
+	      }).on('click', function (d3_event, d) {
+	        context.validator().focusIssue(d);
+	      });
+	      buttons.call(svgIcon('#iD-icon-alert', 'pre-text'));
+	      buttons.append('strong').attr('class', 'issue-message');
+	      buttons.filter(function (d) {
+	        return d.tooltip;
+	      }).call(uiTooltip().title(function (d) {
+	        return d.tooltip;
+	      }).placement('top'));
+	      items = itemsEnter.merge(items);
+	      items.selectAll('.issue-message').html(function (d) {
+	        return d.message(context);
+	      });
+	    }
+	  }
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	  return commitWarnings;
+	}
 
-	        var container = wrap.selectAll('.restriction-container')
-	            .data([0]);
+	var readOnlyTags = [/^changesets_count$/, /^created_by$/, /^ideditor:/, /^imagery_used$/, /^host$/, /^locale$/, /^warnings:/, /^resolved:/, /^closed:note$/, /^closed:keepright$/, /^closed:improveosm:/, /^closed:osmose:/]; // treat most punctuation (except -, _, +, &) as hashtag delimiters - #4398
+	// from https://stackoverflow.com/a/25575009
 
-	        // enter
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'restriction-container');
+	var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
+	function uiCommit(context) {
+	  var dispatch = dispatch$8('cancel');
 
-	        containerEnter
-	            .append('div')
-	            .attr('class', 'restriction-help');
+	  var _userDetails;
 
-	        // update
-	        _container = containerEnter
-	            .merge(container)
-	            .call(renderViewer);
+	  var _selection;
 
-	        var controls = wrap.selectAll('.restriction-controls')
-	            .data([0]);
+	  var changesetEditor = uiChangesetEditor(context).on('change', changeTags);
+	  var rawTagEditor = uiSectionRawTagEditor('changeset-tag-editor', context).on('change', changeTags).readOnlyTags(readOnlyTags);
+	  var commitChanges = uiSectionChanges(context);
+	  var commitWarnings = uiCommitWarnings(context);
 
-	        // enter/update
-	        controls.enter()
-	            .append('div')
-	            .attr('class', 'restriction-controls-container')
-	            .append('div')
-	            .attr('class', 'restriction-controls')
-	            .merge(controls)
-	            .call(renderControls);
-	    }
+	  function commit(selection) {
+	    _selection = selection; // Initialize changeset if one does not exist yet.
 
+	    if (!context.changeset) initChangeset();
+	    loadDerivedChangesetTags();
+	    selection.call(render);
+	  }
 
-	    function renderControls(selection) {
-	        var distControl = selection.selectAll('.restriction-distance')
-	            .data([0]);
+	  function initChangeset() {
+	    // expire stored comment, hashtags, source after cutoff datetime - #3947 #4899
+	    var commentDate = +corePreferences('commentDate') || 0;
+	    var currDate = Date.now();
+	    var cutoff = 2 * 86400 * 1000; // 2 days
 
-	        distControl.exit()
-	            .remove();
+	    if (commentDate > currDate || currDate - commentDate > cutoff) {
+	      corePreferences('comment', null);
+	      corePreferences('hashtags', null);
+	      corePreferences('source', null);
+	    } // load in explicitly-set values, if any
 
-	        var distControlEnter = distControl.enter()
-	            .append('div')
-	            .attr('class', 'restriction-control restriction-distance');
-
-	        distControlEnter
-	            .append('span')
-	            .attr('class', 'restriction-control-label restriction-distance-label')
-	            .text(_t('restriction.controls.distance') + ':');
-
-	        distControlEnter
-	            .append('input')
-	            .attr('class', 'restriction-distance-input')
-	            .attr('type', 'range')
-	            .attr('min', '20')
-	            .attr('max', '50')
-	            .attr('step', '5');
-
-	        distControlEnter
-	            .append('span')
-	            .attr('class', 'restriction-distance-text');
-
-	        // update
-	        selection.selectAll('.restriction-distance-input')
-	            .property('value', _maxDistance)
-	            .on('input', function() {
-	                var val = select(this).property('value');
-	                _maxDistance = +val;
-	                _intersection = null;
-	                _container.selectAll('.layer-osm .layer-turns *').remove();
-	                corePreferences('turn-restriction-distance', _maxDistance);
-	                _parent.call(restrictions);
-	            });
 
-	        selection.selectAll('.restriction-distance-text')
-	            .text(displayMaxDistance(_maxDistance));
+	    if (context.defaultChangesetComment()) {
+	      corePreferences('comment', context.defaultChangesetComment());
+	      corePreferences('commentDate', Date.now());
+	    }
 
+	    if (context.defaultChangesetSource()) {
+	      corePreferences('source', context.defaultChangesetSource());
+	      corePreferences('commentDate', Date.now());
+	    }
 
-	        var viaControl = selection.selectAll('.restriction-via-way')
-	            .data([0]);
+	    if (context.defaultChangesetHashtags()) {
+	      corePreferences('hashtags', context.defaultChangesetHashtags());
+	      corePreferences('commentDate', Date.now());
+	    }
 
-	        viaControl.exit()
-	            .remove();
+	    var detected = utilDetect();
+	    var tags = {
+	      comment: corePreferences('comment') || '',
+	      created_by: context.cleanTagValue('iD ' + context.version),
+	      host: context.cleanTagValue(detected.host),
+	      locale: context.cleanTagValue(_mainLocalizer.localeCode())
+	    }; // call findHashtags initially - this will remove stored
+	    // hashtags if any hashtags are found in the comment - #4304
 
-	        var viaControlEnter = viaControl.enter()
-	            .append('div')
-	            .attr('class', 'restriction-control restriction-via-way');
-
-	        viaControlEnter
-	            .append('span')
-	            .attr('class', 'restriction-control-label restriction-via-way-label')
-	            .text(_t('restriction.controls.via') + ':');
-
-	        viaControlEnter
-	            .append('input')
-	            .attr('class', 'restriction-via-way-input')
-	            .attr('type', 'range')
-	            .attr('min', '0')
-	            .attr('max', '2')
-	            .attr('step', '1');
-
-	        viaControlEnter
-	            .append('span')
-	            .attr('class', 'restriction-via-way-text');
-
-	        // update
-	        selection.selectAll('.restriction-via-way-input')
-	            .property('value', _maxViaWay)
-	            .on('input', function() {
-	                var val = select(this).property('value');
-	                _maxViaWay = +val;
-	                _container.selectAll('.layer-osm .layer-turns *').remove();
-	                corePreferences('turn-restriction-via-way0', _maxViaWay);
-	                _parent.call(restrictions);
-	            });
+	    findHashtags(tags, true);
+	    var hashtags = corePreferences('hashtags');
 
-	        selection.selectAll('.restriction-via-way-text')
-	            .text(displayMaxVia(_maxViaWay));
+	    if (hashtags) {
+	      tags.hashtags = hashtags;
 	    }
 
+	    var source = corePreferences('source');
+
+	    if (source) {
+	      tags.source = source;
+	    }
 
-	    function renderViewer(selection) {
-	        if (!_intersection) { return; }
+	    var photoOverlaysUsed = context.history().photoOverlaysUsed();
 
-	        var vgraph = _intersection.graph;
-	        var filter = utilFunctor(true);
-	        var projection = geoRawMercator();
+	    if (photoOverlaysUsed.length) {
+	      var sources = (tags.source || '').split(';'); // include this tag for any photo layer
 
-	        // Reflow warning: `utilGetDimensions` calls `getBoundingClientRect`
-	        // Instead of asking the restriction-container for its dimensions,
-	        //  we can ask the .sidebar, which can have its dimensions cached.
-	        // width: calc as sidebar - padding
-	        // height: hardcoded (from `80_app.css`)
-	        // var d = utilGetDimensions(selection);
-	        var sdims = utilGetDimensions(context.container().select('.sidebar'));
-	        var d = [ sdims[0] - 50, 370 ];
-	        var c = geoVecScale(d, 0.5);
-	        var z = 22;
+	      if (sources.indexOf('streetlevel imagery') === -1) {
+	        sources.push('streetlevel imagery');
+	      } // add the photo overlays used during editing as sources
 
-	        projection.scale(geoZoomToScale(z));
 
-	        // Calculate extent of all key vertices
-	        var extent = geoExtent();
-	        for (var i = 0; i < _intersection.vertices.length; i++) {
-	            extent._extend(_intersection.vertices[i].extent());
+	      photoOverlaysUsed.forEach(function (photoOverlay) {
+	        if (sources.indexOf(photoOverlay) === -1) {
+	          sources.push(photoOverlay);
 	        }
+	      });
+	      tags.source = context.cleanTagValue(sources.join(';'));
+	    }
 
-	        // If this is a large intersection, adjust zoom to fit extent
-	        if (_intersection.vertices.length > 1) {
-	            var padding = 180;   // in z22 pixels
-	            var tl = projection([extent[0][0], extent[1][1]]);
-	            var br = projection([extent[1][0], extent[0][1]]);
-	            var hFactor = (br[0] - tl[0]) / (d[0] - padding);
-	            var vFactor = (br[1] - tl[1]) / (d[1] - padding);
-	            var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
-	            var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
-	            z = z - Math.max(hZoomDiff, vZoomDiff);
-	            projection.scale(geoZoomToScale(z));
-	        }
+	    context.changeset = new osmChangeset({
+	      tags: tags
+	    });
+	  } // Calculates read-only metadata tags based on the user's editing session and applies
+	  // them to the changeset.
 
-	        var padTop = 35;   // reserve top space for hint text
-	        var extentCenter = projection(extent.center());
-	        extentCenter[1] = extentCenter[1] - padTop;
 
-	        projection
-	            .translate(geoVecSubtract(c, extentCenter))
-	            .clipExtent([[0, 0], d]);
+	  function loadDerivedChangesetTags() {
+	    var osm = context.connection();
+	    if (!osm) return;
+	    var tags = Object.assign({}, context.changeset.tags); // shallow copy
+	    // assign tags for imagery used
+
+	    var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
+	    tags.imagery_used = imageryUsed || 'None'; // assign tags for closed issues and notes
 
-	        var drawLayers = svgLayers(projection, context).only(['osm','touch']).dimensions(d);
-	        var drawVertices = svgVertices(projection, context);
-	        var drawLines = svgLines(projection, context);
-	        var drawTurns = svgTurns(projection, context);
+	    var osmClosed = osm.getClosedIDs();
+	    var itemType;
 
-	        var firstTime = selection.selectAll('.surface').empty();
+	    if (osmClosed.length) {
+	      tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
+	    }
 
-	        selection
-	            .call(drawLayers);
+	    if (services.keepRight) {
+	      var krClosed = services.keepRight.getClosedIDs();
 
-	        var surface = selection.selectAll('.surface')
-	            .classed('tr', true);
+	      if (krClosed.length) {
+	        tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
+	      }
+	    }
 
-	        if (firstTime) {
-	            _initialized = true;
+	    if (services.improveOSM) {
+	      var iOsmClosed = services.improveOSM.getClosedCounts();
 
-	            surface
-	                .call(breathe);
-	        }
+	      for (itemType in iOsmClosed) {
+	        tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
+	      }
+	    }
 
-	        // This can happen if we've lowered the detail while a FROM way
-	        // is selected, and that way is no longer part of the intersection.
-	        if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
-	            _fromWayID = null;
-	            _oldTurns = null;
-	        }
+	    if (services.osmose) {
+	      var osmoseClosed = services.osmose.getClosedCounts();
 
-	        surface
-	            .call(utilSetDimensions, d)
-	            .call(drawVertices, vgraph, _intersection.vertices, filter, extent, z)
-	            .call(drawLines, vgraph, _intersection.ways, filter)
-	            .call(drawTurns, vgraph, _intersection.turns(_fromWayID, _maxViaWay));
+	      for (itemType in osmoseClosed) {
+	        tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
+	      }
+	    } // remove existing issue counts
 
-	        surface
-	            .on('click.restrictions', click)
-	            .on('mouseover.restrictions', mouseover);
 
-	        surface
-	            .selectAll('.selected')
-	            .classed('selected', false);
+	    for (var key in tags) {
+	      if (key.match(/(^warnings:)|(^resolved:)/)) {
+	        delete tags[key];
+	      }
+	    }
 
-	        surface
-	            .selectAll('.related')
-	            .classed('related', false);
+	    function addIssueCounts(issues, prefix) {
+	      var issuesByType = utilArrayGroupBy(issues, 'type');
 
-	        if (_fromWayID) {
-	            var way = vgraph.entity(_fromWayID);
-	            surface
-	                .selectAll('.' + _fromWayID)
-	                .classed('selected', true)
-	                .classed('related', true);
-	        }
+	      for (var issueType in issuesByType) {
+	        var issuesOfType = issuesByType[issueType];
 
-	        document.addEventListener('resizeWindow', function () {
-	            utilSetDimensions(_container, null);
-	            redraw(1);
-	        }, false);
+	        if (issuesOfType[0].subtype) {
+	          var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');
 
-	        updateHints(null);
+	          for (var issueSubtype in issuesBySubtype) {
+	            var issuesOfSubtype = issuesBySubtype[issueSubtype];
+	            tags[prefix + ':' + issueType + ':' + issueSubtype] = context.cleanTagValue(issuesOfSubtype.length.toString());
+	          }
+	        } else {
+	          tags[prefix + ':' + issueType] = context.cleanTagValue(issuesOfType.length.toString());
+	        }
+	      }
+	    } // add counts of warnings generated by the user's edits
 
 
-	        function click() {
-	            surface
-	                .call(breathe.off)
-	                .call(breathe);
+	    var warnings = context.validator().getIssuesBySeverity({
+	      what: 'edited',
+	      where: 'all',
+	      includeIgnored: true,
+	      includeDisabledRules: true
+	    }).warning.filter(function (issue) {
+	      return issue.type !== 'help_request';
+	    }); // exclude 'fixme' and similar - #8603
 
-	            var datum = event.target.__data__;
-	            var entity = datum && datum.properties && datum.properties.entity;
-	            if (entity) {
-	                datum = entity;
-	            }
+	    addIssueCounts(warnings, 'warnings'); // add counts of issues resolved by the user's edits
 
-	            if (datum instanceof osmWay && (datum.__from || datum.__via)) {
-	                _fromWayID = datum.id;
-	                _oldTurns = null;
-	                redraw();
-
-	            } else if (datum instanceof osmTurn) {
-	                var actions, extraActions, turns, i;
-	                var restrictionType = osmInferRestriction(vgraph, datum, projection);
-
-	                if (datum.restrictionID && !datum.direct) {
-	                    return;
-
-	                } else if (datum.restrictionID && !datum.only) {    // NO -> ONLY
-	                    var seen = {};
-	                    var datumOnly = JSON.parse(JSON.stringify(datum));   // deep clone the datum
-	                    datumOnly.only = true;                               // but change this property
-	                    restrictionType = restrictionType.replace(/^no/, 'only');
-
-	                    // Adding an ONLY restriction should destroy all other direct restrictions from the FROM towards the VIA.
-	                    // We will remember them in _oldTurns, and restore them if the user clicks again.
-	                    turns = _intersection.turns(_fromWayID, 2);
-	                    extraActions = [];
-	                    _oldTurns = [];
-	                    for (i = 0; i < turns.length; i++) {
-	                        var turn = turns[i];
-	                        if (seen[turn.restrictionID]) { continue; }  // avoid deleting the turn twice (#4968, #4928)
-
-	                        if (turn.direct && turn.path[1] === datum.path[1]) {
-	                            seen[turns[i].restrictionID] = true;
-	                            turn.restrictionType = osmInferRestriction(vgraph, turn, projection);
-	                            _oldTurns.push(turn);
-	                            extraActions.push(actionUnrestrictTurn(turn));
-	                        }
-	                    }
+	    var resolvedIssues = context.validator().getResolvedIssues();
+	    addIssueCounts(resolvedIssues, 'resolved');
+	    context.changeset = context.changeset.update({
+	      tags: tags
+	    });
+	  }
 
-	                    actions = _intersection.actions.concat(extraActions, [
-	                        actionRestrictTurn(datumOnly, restrictionType),
-	                        _t('operations.restriction.annotation.create')
-	                    ]);
-
-	                } else if (datum.restrictionID) {   // ONLY -> Allowed
-	                    // Restore whatever restrictions we might have destroyed by cycling thru the ONLY state.
-	                    // This relies on the assumption that the intersection was already split up when we
-	                    // performed the previous action (NO -> ONLY), so the IDs in _oldTurns shouldn't have changed.
-	                    turns = _oldTurns || [];
-	                    extraActions = [];
-	                    for (i = 0; i < turns.length; i++) {
-	                        if (turns[i].key !== datum.key) {
-	                            extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
-	                        }
-	                    }
-	                    _oldTurns = null;
-
-	                    actions = _intersection.actions.concat(extraActions, [
-	                        actionUnrestrictTurn(datum),
-	                        _t('operations.restriction.annotation.delete')
-	                    ]);
-
-	                } else {    // Allowed -> NO
-	                    actions = _intersection.actions.concat([
-	                        actionRestrictTurn(datum, restrictionType),
-	                        _t('operations.restriction.annotation.create')
-	                    ]);
-	                }
+	  function render(selection) {
+	    var osm = context.connection();
+	    if (!osm) return;
+	    var header = selection.selectAll('.header').data([0]);
+	    var headerTitle = header.enter().append('div').attr('class', 'header fillL');
+	    headerTitle.append('div').append('h2').call(_t.append('commit.title'));
+	    headerTitle.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+	      dispatch.call('cancel', this);
+	    }).call(svgIcon('#iD-icon-close'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body); // Changeset Section
 
-	                context.perform.apply(context, actions);
+	    var changesetSection = body.selectAll('.changeset-editor').data([0]);
+	    changesetSection = changesetSection.enter().append('div').attr('class', 'modal-section changeset-editor').merge(changesetSection);
+	    changesetSection.call(changesetEditor.changesetID(context.changeset.id).tags(context.changeset.tags)); // Warnings
 
-	                // At this point the datum will be changed, but will have same key..
-	                // Refresh it and update the help..
-	                var s = surface.selectAll('.' + datum.key);
-	                datum = s.empty() ? null : s.datum();
-	                updateHints(datum);
+	    body.call(commitWarnings); // Upload Explanation
 
-	            } else {
-	                _fromWayID = null;
-	                _oldTurns = null;
-	                redraw();
-	            }
-	        }
+	    var saveSection = body.selectAll('.save-section').data([0]);
+	    saveSection = saveSection.enter().append('div').attr('class', 'modal-section save-section fillL').merge(saveSection);
+	    var prose = saveSection.selectAll('.commit-info').data([0]);
 
+	    if (prose.enter().size()) {
+	      // first time, make sure to update user details in prose
+	      _userDetails = null;
+	    }
 
-	        function mouseover() {
-	            var datum = event.target.__data__;
-	            updateHints(datum);
-	        }
+	    prose = prose.enter().append('p').attr('class', 'commit-info').call(_t.append('commit.upload_explanation')).merge(prose); // always check if this has changed, but only update prose.html()
+	    // if needed, because it can trigger a style recalculation
 
-	        _lastXPos = _lastXPos || sdims[0];
+	    osm.userDetails(function (err, user) {
+	      if (err) return;
+	      if (_userDetails === user) return; // no change
 
-	        function redraw(minChange) {
-	            var xPos = -1;
+	      _userDetails = user;
+	      var userLink = select(document.createElement('div'));
 
-	            if (minChange) {
-	                xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
-	            }
+	      if (user.image_url) {
+	        userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+	      }
 
-	            if (!minChange || (minChange && Math.abs(xPos - _lastXPos) >= minChange)) {
-	                if (context.hasEntity(_vertexID)) {
-	                    _lastXPos = xPos;
-	                    _container.call(renderViewer);
-	                }
-	            }
+	      userLink.append('a').attr('class', 'user-info').text(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
+	      prose.html(_t.html('commit.upload_explanation_with_user', {
+	        user: {
+	          html: userLink.html()
 	        }
+	      }));
+	    }); // Request Review
 
+	    var requestReview = saveSection.selectAll('.request-review').data([0]); // Enter
 
-	        function highlightPathsFrom(wayID) {
-	            surface.selectAll('.related')
-	                .classed('related', false)
-	                .classed('allow', false)
-	                .classed('restrict', false)
-	                .classed('only', false);
+	    var requestReviewEnter = requestReview.enter().append('div').attr('class', 'request-review');
+	    var requestReviewDomId = utilUniqueDomId('commit-input-request-review');
+	    var labelEnter = requestReviewEnter.append('label').attr('for', requestReviewDomId);
 
-	            surface.selectAll('.' + wayID)
-	                .classed('related', true);
+	    if (!labelEnter.empty()) {
+	      labelEnter.call(uiTooltip().title(_t.html('commit.request_review_info')).placement('top'));
+	    }
 
-	            if (wayID) {
-	                var turns = _intersection.turns(wayID, _maxViaWay);
-	                for (var i = 0; i < turns.length; i++) {
-	                    var turn = turns[i];
-	                    var ids = [turn.to.way];
-	                    var klass = (turn.no ? 'restrict' : (turn.only ? 'only' : 'allow'));
+	    labelEnter.append('input').attr('type', 'checkbox').attr('id', requestReviewDomId);
+	    labelEnter.append('span').call(_t.append('commit.request_review')); // Update
 
-	                    if (turn.only || turns.length === 1) {
-	                        if (turn.via.ways) {
-	                            ids = ids.concat(turn.via.ways);
-	                        }
-	                    } else if (turn.to.way === wayID) {
-	                        continue;
-	                    }
+	    requestReview = requestReview.merge(requestReviewEnter);
+	    var requestReviewInput = requestReview.selectAll('input').property('checked', isReviewRequested(context.changeset.tags)).on('change', toggleRequestReview); // Buttons
 
-	                    surface.selectAll(utilEntitySelector(ids))
-	                        .classed('related', true)
-	                        .classed('allow', (klass === 'allow'))
-	                        .classed('restrict', (klass === 'restrict'))
-	                        .classed('only', (klass === 'only'));
-	                }
-	            }
+	    var buttonSection = saveSection.selectAll('.buttons').data([0]); // enter
+
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons fillL');
+	    buttonEnter.append('button').attr('class', 'secondary-action button cancel-button').append('span').attr('class', 'label').call(_t.append('commit.cancel'));
+	    var uploadButton = buttonEnter.append('button').attr('class', 'action button save-button');
+	    uploadButton.append('span').attr('class', 'label').call(_t.append('commit.save'));
+	    var uploadBlockerTooltipText = getUploadBlockerMessage(); // update
+
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.selectAll('.cancel-button').on('click.cancel', function () {
+	      dispatch.call('cancel', this);
+	    });
+	    buttonSection.selectAll('.save-button').classed('disabled', uploadBlockerTooltipText !== null).on('click.save', function () {
+	      if (!select(this).classed('disabled')) {
+	        this.blur(); // avoid keeping focus on the button - #4641
+
+	        for (var key in context.changeset.tags) {
+	          // remove any empty keys before upload
+	          if (!key) delete context.changeset.tags[key];
 	        }
 
+	        context.uploader().save(context.changeset);
+	      }
+	    }); // remove any existing tooltip
 
-	        function updateHints(datum) {
-	            var help = _container.selectAll('.restriction-help').html('');
+	    uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
 
-	            var placeholders = {};
-	            ['from', 'via', 'to'].forEach(function(k) {
-	                placeholders[k] = '<span class="qualifier">' + _t('restriction.help.' + k) + '</span>';
-	            });
+	    if (uploadBlockerTooltipText) {
+	      buttonSection.selectAll('.save-button').call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
+	    } // Raw Tag Editor
 
-	            var entity = datum && datum.properties && datum.properties.entity;
-	            if (entity) {
-	                datum = entity;
-	            }
 
-	            if (_fromWayID) {
-	                way = vgraph.entity(_fromWayID);
-	                surface
-	                    .selectAll('.' + _fromWayID)
-	                    .classed('selected', true)
-	                    .classed('related', true);
-	            }
+	    var tagSection = body.selectAll('.tag-section.raw-tag-editor').data([0]);
+	    tagSection = tagSection.enter().append('div').attr('class', 'modal-section tag-section raw-tag-editor').merge(tagSection);
+	    tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
+	    .render);
+	    var changesSection = body.selectAll('.commit-changes-section').data([0]);
+	    changesSection = changesSection.enter().append('div').attr('class', 'modal-section commit-changes-section').merge(changesSection); // Change summary
 
-	            // Hovering a way
-	            if (datum instanceof osmWay && datum.__from) {
-	                way = datum;
-
-	                highlightPathsFrom(_fromWayID ? null : way.id);
-	                surface.selectAll('.' + way.id)
-	                    .classed('related', true);
-
-	                var clickSelect = (!_fromWayID || _fromWayID !== way.id);
-	                help
-	                    .append('div')      // "Click to select FROM {fromName}." / "FROM {fromName}"
-	                    .html(_t('restriction.help.' + (clickSelect ? 'select_from_name' : 'from_name'), {
-	                        from: placeholders.from,
-	                        fromName: displayName(way.id, vgraph)
-	                    }));
-
-
-	            // Hovering a turn arrow
-	            } else if (datum instanceof osmTurn) {
-	                var restrictionType = osmInferRestriction(vgraph, datum, projection);
-	                var turnType = restrictionType.replace(/^(only|no)\_/, '');
-	                var indirect = (datum.direct === false ? _t('restriction.help.indirect') : '');
-	                var klass, turnText, nextText;
-
-	                if (datum.no) {
-	                    klass = 'restrict';
-	                    turnText = _t('restriction.help.turn.no_' + turnType, { indirect: indirect });
-	                    nextText = _t('restriction.help.turn.only_' + turnType, { indirect: '' });
-	                } else if (datum.only) {
-	                    klass = 'only';
-	                    turnText = _t('restriction.help.turn.only_' + turnType, { indirect: indirect });
-	                    nextText = _t('restriction.help.turn.allowed_' + turnType, { indirect: '' });
-	                } else {
-	                    klass = 'allow';
-	                    turnText = _t('restriction.help.turn.allowed_' + turnType, { indirect: indirect });
-	                    nextText = _t('restriction.help.turn.no_' + turnType, { indirect: '' });
-	                }
+	    changesSection.call(commitChanges.render);
 
-	                help
-	                    .append('div')      // "NO Right Turn (indirect)"
-	                    .attr('class', 'qualifier ' + klass)
-	                    .text(turnText);
-
-	                help
-	                    .append('div')      // "FROM {fromName} TO {toName}"
-	                    .html(_t('restriction.help.from_name_to_name', {
-	                        from: placeholders.from,
-	                        fromName: displayName(datum.from.way, vgraph),
-	                        to: placeholders.to,
-	                        toName: displayName(datum.to.way, vgraph)
-	                    }));
-
-	                if (datum.via.ways && datum.via.ways.length) {
-	                    var names = [];
-	                    for (var i = 0; i < datum.via.ways.length; i++) {
-	                        var prev = names[names.length - 1];
-	                        var curr = displayName(datum.via.ways[i], vgraph);
-	                        if (!prev || curr !== prev)   // collapse identical names
-	                            { names.push(curr); }
-	                    }
+	    function toggleRequestReview() {
+	      var rr = requestReviewInput.property('checked');
+	      updateChangeset({
+	        review_requested: rr ? 'yes' : undefined
+	      });
+	      tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
+	      .render);
+	    }
+	  }
 
-	                    help
-	                        .append('div')      // "VIA {viaNames}"
-	                        .html(_t('restriction.help.via_names', {
-	                            via: placeholders.via,
-	                            viaNames: names.join(', ')
-	                        }));
-	                }
+	  function getUploadBlockerMessage() {
+	    var errors = context.validator().getIssuesBySeverity({
+	      what: 'edited',
+	      where: 'all'
+	    }).error;
 
-	                if (!indirect) {
-	                    help
-	                        .append('div')      // Click for "No Right Turn"
-	                        .text(_t('restriction.help.toggle', { turn: nextText.trim() }));
-	                }
+	    if (errors.length) {
+	      return _t('commit.outstanding_errors_message', {
+	        count: errors.length
+	      });
+	    } else {
+	      var hasChangesetComment = context.changeset && context.changeset.tags.comment && context.changeset.tags.comment.trim().length;
 
-	                highlightPathsFrom(null);
-	                var alongIDs = datum.path.slice();
-	                surface.selectAll(utilEntitySelector(alongIDs))
-	                    .classed('related', true)
-	                    .classed('allow', (klass === 'allow'))
-	                    .classed('restrict', (klass === 'restrict'))
-	                    .classed('only', (klass === 'only'));
+	      if (!hasChangesetComment) {
+	        return _t('commit.comment_needed_message');
+	      }
+	    }
 
+	    return null;
+	  }
 
-	            // Hovering empty surface
-	            } else {
-	                highlightPathsFrom(null);
-	                if (_fromWayID) {
-	                    help
-	                        .append('div')      // "FROM {fromName}"
-	                        .html(_t('restriction.help.from_name', {
-	                            from: placeholders.from,
-	                            fromName: displayName(_fromWayID, vgraph)
-	                        }));
+	  function changeTags(_, changed, onInput) {
+	    if (changed.hasOwnProperty('comment')) {
+	      if (changed.comment === undefined) {
+	        changed.comment = '';
+	      }
 
-	                } else {
-	                    help
-	                        .append('div')      // "Click to select a FROM segment."
-	                        .html(_t('restriction.help.select_from', {
-	                            from: placeholders.from
-	                        }));
-	                }
-	            }
-	        }
+	      if (!onInput) {
+	        corePreferences('comment', changed.comment);
+	        corePreferences('commentDate', Date.now());
+	      }
 	    }
 
+	    if (changed.hasOwnProperty('source')) {
+	      if (changed.source === undefined) {
+	        corePreferences('source', null);
+	      } else if (!onInput) {
+	        corePreferences('source', changed.source);
+	        corePreferences('commentDate', Date.now());
+	      }
+	    } // no need to update `prefs` for `hashtags` here since it's done in `updateChangeset`
 
-	    function displayMaxDistance(maxDist) {
-	        var isImperial = !_mainLocalizer.usesMetric();
-	        var opts;
 
-	        if (isImperial) {
-	            var distToFeet = {   // imprecise conversion for prettier display
-	                20: 70, 25: 85, 30: 100, 35: 115, 40: 130, 45: 145, 50: 160
-	            }[maxDist];
-	            opts = { distance: _t('units.feet', { quantity: distToFeet }) };
-	        } else {
-	            opts = { distance: _t('units.meters', { quantity: maxDist }) };
-	        }
+	    updateChangeset(changed, onInput);
 
-	        return _t('restriction.controls.distance_up_to', opts);
+	    if (_selection) {
+	      _selection.call(render);
 	    }
+	  }
 
+	  function findHashtags(tags, commentOnly) {
+	    var detectedHashtags = commentHashtags();
 
-	    function displayMaxVia(maxVia) {
-	        return maxVia === 0 ? _t('restriction.controls.via_node_only')
-	            : maxVia === 1 ? _t('restriction.controls.via_up_to_one')
-	            : _t('restriction.controls.via_up_to_two');
+	    if (detectedHashtags.length) {
+	      // always remove stored hashtags if there are hashtags in the comment - #4304
+	      corePreferences('hashtags', null);
 	    }
 
-
-	    function displayName(entityID, graph) {
-	        var entity = graph.entity(entityID);
-	        var name = utilDisplayName(entity) || '';
-	        var matched = _mainPresetIndex.match(entity, graph);
-	        var type = (matched && matched.name()) || utilDisplayType(entity.id);
-	        return name || type;
+	    if (!detectedHashtags.length || !commentOnly) {
+	      detectedHashtags = detectedHashtags.concat(hashtagHashtags());
 	    }
 
+	    var allLowerCase = new Set();
+	    return detectedHashtags.filter(function (hashtag) {
+	      // Compare tags as lowercase strings, but keep original case tags
+	      var lowerCase = hashtag.toLowerCase();
 
-	    restrictions.entityIDs = function(val) {
-	        _intersection = null;
-	        _fromWayID = null;
-	        _oldTurns = null;
-	        _vertexID = val[0];
-	    };
+	      if (!allLowerCase.has(lowerCase)) {
+	        allLowerCase.add(lowerCase);
+	        return true;
+	      }
+
+	      return false;
+	    }); // Extract hashtags from `comment`
 
+	    function commentHashtags() {
+	      var matches = (tags.comment || '').replace(/http\S*/g, '') // drop anything that looks like a URL - #4289
+	      .match(hashtagRegex);
+	      return matches || [];
+	    } // Extract and clean hashtags from `hashtags`
 
-	    restrictions.tags = function() {};
-	    restrictions.focus = function() {};
 
+	    function hashtagHashtags() {
+	      var matches = (tags.hashtags || '').split(/[,;\s]+/).map(function (s) {
+	        if (s[0] !== '#') {
+	          s = '#' + s;
+	        } // prepend '#'
 
-	    restrictions.off = function(selection) {
-	        if (!_initialized) { return; }
 
-	        selection.selectAll('.surface')
-	            .call(breathe.off)
-	            .on('click.restrictions', null)
-	            .on('mouseover.restrictions', null);
+	        var matched = s.match(hashtagRegex);
+	        return matched && matched[0];
+	      }).filter(Boolean); // exclude falsy
 
-	        select(window)
-	            .on('resize.restrictions', null);
-	    };
+	      return matches || [];
+	    }
+	  }
 
+	  function isReviewRequested(tags) {
+	    var rr = tags.review_requested;
+	    if (rr === undefined) return false;
+	    rr = rr.trim().toLowerCase();
+	    return !(rr === '' || rr === 'no');
+	  }
 
-	    return utilRebind(restrictions, dispatch$1, 'on');
-	}
+	  function updateChangeset(changed, onInput) {
+	    var tags = Object.assign({}, context.changeset.tags); // shallow copy
 
-	uiFieldRestrictions.supportsMultiselection = false;
+	    Object.keys(changed).forEach(function (k) {
+	      var v = changed[k];
+	      k = context.cleanTagKey(k);
+	      if (readOnlyTags.indexOf(k) !== -1) return;
 
-	function uiFieldTextarea(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var input = select(null);
-	    var _tags;
+	      if (v === undefined) {
+	        delete tags[k];
+	      } else if (onInput) {
+	        tags[k] = v;
+	      } else {
+	        tags[k] = context.cleanTagValue(v);
+	      }
+	    });
 
+	    if (!onInput) {
+	      // when changing the comment, override hashtags with any found in comment.
+	      var commentOnly = changed.hasOwnProperty('comment') && changed.comment !== '';
+	      var arr = findHashtags(tags, commentOnly);
 
-	    function textarea(selection) {
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	      if (arr.length) {
+	        tags.hashtags = context.cleanTagValue(arr.join(';'));
+	        corePreferences('hashtags', tags.hashtags);
+	      } else {
+	        delete tags.hashtags;
+	        corePreferences('hashtags', null);
+	      }
+	    } // always update userdetails, just in case user reauthenticates as someone else
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
 
-	        input = wrap.selectAll('textarea')
-	            .data([0]);
+	    if (_userDetails && _userDetails.changesets_count !== undefined) {
+	      var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1; // #4283
 
-	        input = input.enter()
-	            .append('textarea')
-	            .attr('id', field.domId)
-	            .call(utilNoAuto)
-	            .on('input', change(true))
-	            .on('blur', change())
-	            .on('change', change())
-	            .merge(input);
-	    }
+	      tags.changesets_count = String(changesetsCount); // first 100 edits - new user
 
+	      if (changesetsCount <= 100) {
+	        var s;
+	        s = corePreferences('walkthrough_completed');
 
-	    function change(onInput) {
-	        return function() {
+	        if (s) {
+	          tags['ideditor:walkthrough_completed'] = s;
+	        }
+
+	        s = corePreferences('walkthrough_progress');
 
-	            var val = utilGetSetValue(input);
-	            if (!onInput) { val = context.cleanTagValue(val); }
+	        if (s) {
+	          tags['ideditor:walkthrough_progress'] = s;
+	        }
 
-	            // don't override multiple values with blank string
-	            if (!val && Array.isArray(_tags[field.key])) { return; }
+	        s = corePreferences('walkthrough_started');
 
-	            var t = {};
-	            t[field.key] = val || undefined;
-	            dispatch$1.call('change', this, t, onInput);
-	        };
+	        if (s) {
+	          tags['ideditor:walkthrough_started'] = s;
+	        }
+	      }
+	    } else {
+	      delete tags.changesets_count;
 	    }
 
+	    if (!fastDeepEqual(context.changeset.tags, tags)) {
+	      context.changeset = context.changeset.update({
+	        tags: tags
+	      });
+	    }
+	  }
 
-	    textarea.tags = function(tags) {
-	        _tags = tags;
+	  commit.reset = function () {
+	    context.changeset = null;
+	  };
 
-	        var isMixed = Array.isArray(tags[field.key]);
+	  return utilRebind(commit, dispatch, 'on');
+	}
 
-	        utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '')
-	            .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined)
-	            .attr('placeholder', isMixed ? _t('inspector.multiple_values') : (field.placeholder() || _t('inspector.unknown')))
-	            .classed('mixed', isMixed);
-	    };
+	function uiConfirm(selection) {
+	  var modalSelection = uiModal(selection);
+	  modalSelection.select('.modal').classed('modal-alert', true);
+	  var section = modalSelection.select('.content');
+	  section.append('div').attr('class', 'modal-section header');
+	  section.append('div').attr('class', 'modal-section message-text');
+	  var buttons = section.append('div').attr('class', 'modal-section buttons cf');
+
+	  modalSelection.okButton = function () {
+	    buttons.append('button').attr('class', 'button ok-button action').on('click.confirm', function () {
+	      modalSelection.remove();
+	    }).call(_t.append('confirm.okay')).node().focus();
+	    return modalSelection;
+	  };
 
+	  return modalSelection;
+	}
 
-	    textarea.focus = function() {
-	        input.node().focus();
-	    };
+	function uiConflicts(context) {
+	  var dispatch = dispatch$8('cancel', 'save');
+	  var keybinding = utilKeybinding('conflicts');
 
+	  var _origChanges;
 
-	    return utilRebind(textarea, dispatch$1, 'on');
-	}
+	  var _conflictList;
 
-	function uiFieldWikidata(field, context) {
-	    var wikidata = services.wikidata;
-	    var dispatch$1 = dispatch('change');
-
-	    var _selection = select(null);
-	    var _searchInput = select(null);
-	    var _qid = null;
-	    var _wikidataEntity = null;
-	    var _wikiURL = '';
-	    var _entityIDs = [];
-
-	    var _wikipediaKey = field.keys && field.keys.find(function(key) {
-	            return key.includes('wikipedia');
-	        }),
-	        _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];
+	  var _shownConflictIndex;
 
-	    var combobox = uiCombobox(context, 'combo-' + field.safeid)
-	        .caseSensitive(true)
-	        .minItems(1);
+	  function keybindingOn() {
+	    select(document).call(keybinding.on('⎋', cancel, true));
+	  }
 
-	    function wiki(selection) {
+	  function keybindingOff() {
+	    select(document).call(keybinding.unbind);
+	  }
 
-	        _selection = selection;
+	  function tryAgain() {
+	    keybindingOff();
+	    dispatch.call('save');
+	  }
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  function cancel() {
+	    keybindingOff();
+	    dispatch.call('cancel');
+	  }
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
-
-
-	        var list = wrap.selectAll('ul')
-	            .data([0]);
-
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'rows')
-	            .merge(list);
-
-	        var searchRow = list.selectAll('li.wikidata-search')
-	            .data([0]);
-
-	        var searchRowEnter = searchRow.enter()
-	            .append('li')
-	            .attr('class', 'wikidata-search');
-
-	        searchRowEnter
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('id', field.domId)
-	            .style('flex', '1')
-	            .call(utilNoAuto)
-	            .on('focus', function() {
-	                var node = select(this).node();
-	                node.setSelectionRange(0, node.value.length);
-	            })
-	            .on('blur', function() {
-	                setLabelForEntity();
-	            })
-	            .call(combobox.fetcher(fetchWikidataItems));
-
-	        combobox.on('accept', function(d) {
-	            _qid = d.id;
-	            change();
-	        }).on('cancel', function() {
-	            setLabelForEntity();
-	        });
+	  function conflicts(selection) {
+	    keybindingOn();
+	    var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'fr').attr('title', _t('icons.close')).on('click', cancel).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h2').call(_t.append('save.conflict.header'));
+	    var bodyEnter = selection.selectAll('.body').data([0]).enter().append('div').attr('class', 'body fillL');
+	    var conflictsHelpEnter = bodyEnter.append('div').attr('class', 'conflicts-help').call(_t.append('save.conflict.help')); // Download changes link
 
-	        searchRowEnter
-	            .append('button')
-	            .attr('class', 'form-field-button wiki-link')
-	            .attr('title', _t('icons.view_on', { domain: 'wikidata.org' }))
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-out-link'))
-	            .on('click', function() {
-	                event.preventDefault();
-	                if (_wikiURL) { window.open(_wikiURL, '_blank'); }
-	            });
+	    var detected = utilDetect();
+	    var changeset = new osmChangeset();
+	    delete changeset.id; // Export without changeset_id
 
-	        searchRow = searchRow.merge(searchRowEnter);
-
-	        _searchInput = searchRow.select('input');
-
-	        var wikidataProperties = ['description', 'identifier'];
-
-	        var items = list.selectAll('li.labeled-input')
-	            .data(wikidataProperties);
-
-	        // Enter
-	        var enter = items.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'labeled-input preset-wikidata-' + d; });
-
-	        enter
-	            .append('span')
-	            .attr('class', 'label')
-	            .text(function(d) { return _t('wikidata.' + d); });
-
-	        enter
-	            .append('input')
-	            .attr('type', 'text')
-	            .call(utilNoAuto)
-	            .classed('disabled', 'true')
-	            .attr('readonly', 'true');
-
-	        enter
-	            .append('button')
-	            .attr('class', 'form-field-button')
-	            .attr('title', _t('icons.copy'))
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-operation-copy'))
-	            .on('click', function() {
-	                event.preventDefault();
-	                select(this.parentNode)
-	                    .select('input')
-	                    .node()
-	                    .select();
-	                document.execCommand('copy');
-	            });
+	    var data = JXON.stringify(changeset.osmChangeJXON(_origChanges));
+	    var blob = new Blob([data], {
+	      type: 'text/xml;charset=utf-8;'
+	    });
+	    var fileName = 'changes.osc';
+	    var linkEnter = conflictsHelpEnter.selectAll('.download-changes').append('a').attr('class', 'download-changes');
 
+	    if (detected.download) {
+	      // All except IE11 and Edge
+	      linkEnter // download the data as a file
+	      .attr('href', window.URL.createObjectURL(blob)).attr('download', fileName);
+	    } else {
+	      // IE11 and Edge
+	      linkEnter // open data uri in a new tab
+	      .attr('target', '_blank').on('click.download', function () {
+	        navigator.msSaveBlob(blob, fileName);
+	      });
 	    }
 
-	    function fetchWikidataItems(q, callback) {
+	    linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').call(_t.append('save.conflict.download_changes'));
+	    bodyEnter.append('div').attr('class', 'conflict-container fillL3').call(showConflict, 0);
+	    bodyEnter.append('div').attr('class', 'conflicts-done').attr('opacity', 0).style('display', 'none').call(_t.append('save.conflict.done'));
+	    var buttonsEnter = bodyEnter.append('div').attr('class', 'buttons col12 joined conflicts-buttons');
+	    buttonsEnter.append('button').attr('disabled', _conflictList.length > 1).attr('class', 'action conflicts-button col6').call(_t.append('save.title')).on('click.try_again', tryAgain);
+	    buttonsEnter.append('button').attr('class', 'secondary-action conflicts-button col6').call(_t.append('confirm.cancel')).on('click.cancel', cancel);
+	  }
+
+	  function showConflict(selection, index) {
+	    index = utilWrap(index, _conflictList.length);
+	    _shownConflictIndex = index;
+	    var parent = select(selection.node().parentNode); // enable save button if this is the last conflict being reviewed..
+
+	    if (index === _conflictList.length - 1) {
+	      window.setTimeout(function () {
+	        parent.select('.conflicts-button').attr('disabled', null);
+	        parent.select('.conflicts-done').transition().attr('opacity', 1).style('display', 'block');
+	      }, 250);
+	    }
+
+	    var conflict = selection.selectAll('.conflict').data([_conflictList[index]]);
+	    conflict.exit().remove();
+	    var conflictEnter = conflict.enter().append('div').attr('class', 'conflict');
+	    conflictEnter.append('h4').attr('class', 'conflict-count').call(_t.append('save.conflict.count', {
+	      num: index + 1,
+	      total: _conflictList.length
+	    }));
+	    conflictEnter.append('a').attr('class', 'conflict-description').attr('href', '#').text(function (d) {
+	      return d.name;
+	    }).on('click', function (d3_event, d) {
+	      d3_event.preventDefault();
+	      zoomToEntity(d.id);
+	    });
+	    var details = conflictEnter.append('div').attr('class', 'conflict-detail-container');
+	    details.append('ul').attr('class', 'conflict-detail-list').selectAll('li').data(function (d) {
+	      return d.details || [];
+	    }).enter().append('li').attr('class', 'conflict-detail-item').html(function (d) {
+	      return d;
+	    });
+	    details.append('div').attr('class', 'conflict-choices').call(addChoices);
+	    details.append('div').attr('class', 'conflict-nav-buttons joined cf').selectAll('button').data(['previous', 'next']).enter().append('button').html(function (d) {
+	      return _t.html('save.conflict.' + d);
+	    }).attr('class', 'conflict-nav-button action col6').attr('disabled', function (d, i) {
+	      return i === 0 && index === 0 || i === 1 && index === _conflictList.length - 1 || null;
+	    }).on('click', function (d3_event, d) {
+	      d3_event.preventDefault();
+	      var container = parent.selectAll('.conflict-container');
+	      var sign = d === 'previous' ? -1 : 1;
+	      container.selectAll('.conflict').remove();
+	      container.call(showConflict, index + sign);
+	    });
+	  }
 
-	        if (!q && _hintKey) {
-	            // other tags may be good search terms
-	            for (var i in _entityIDs) {
-	                var entity = context.hasEntity(_entityIDs[i]);
-	                if (entity.tags[_hintKey]) {
-	                    q = entity.tags[_hintKey];
-	                    break;
-	                }
-	            }
-	        }
+	  function addChoices(selection) {
+	    var choices = selection.append('ul').attr('class', 'layer-list').selectAll('li').data(function (d) {
+	      return d.choices || [];
+	    }); // enter
 
-	        wikidata.itemsForSearchQuery(q, function(err, data) {
-	            if (err) { return; }
+	    var choicesEnter = choices.enter().append('li').attr('class', 'layer');
+	    var labelEnter = choicesEnter.append('label');
+	    labelEnter.append('input').attr('type', 'radio').attr('name', function (d) {
+	      return d.id;
+	    }).on('change', function (d3_event, d) {
+	      var ul = this.parentNode.parentNode.parentNode;
+	      ul.__data__.chosen = d.id;
+	      choose(d3_event, ul, d);
+	    });
+	    labelEnter.append('span').text(function (d) {
+	      return d.text;
+	    }); // update
 
-	            for (var i in data) {
-	                data[i].value = data[i].label + ' (' +  data[i].id + ')';
-	                data[i].title = data[i].description;
-	            }
+	    choicesEnter.merge(choices).each(function (d) {
+	      var ul = this.parentNode;
 
-	            if (callback) { callback(data); }
-	        });
-	    }
+	      if (ul.__data__.chosen === d.id) {
+	        choose(null, ul, d);
+	      }
+	    });
+	  }
 
+	  function choose(d3_event, ul, datum) {
+	    if (d3_event) d3_event.preventDefault();
+	    select(ul).selectAll('li').classed('active', function (d) {
+	      return d === datum;
+	    }).selectAll('input').property('checked', function (d) {
+	      return d === datum;
+	    });
+	    var extent = geoExtent();
+	    var entity;
+	    entity = context.graph().hasEntity(datum.id);
+	    if (entity) extent._extend(entity.extent(context.graph()));
+	    datum.action();
+	    entity = context.graph().hasEntity(datum.id);
+	    if (entity) extent._extend(entity.extent(context.graph()));
+	    zoomToEntity(datum.id, extent);
+	  }
+
+	  function zoomToEntity(id, extent) {
+	    context.surface().selectAll('.hover').classed('hover', false);
+	    var entity = context.graph().hasEntity(id);
+
+	    if (entity) {
+	      if (extent) {
+	        context.map().trimmedExtent(extent);
+	      } else {
+	        context.map().zoomToEase(entity);
+	      }
 
-	    function change() {
-	        var syncTags = {};
-	        syncTags[field.key] = _qid;
-	        dispatch$1.call('change', this, syncTags);
+	      context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph())).classed('hover', true);
+	    }
+	  } // The conflict list should be an array of objects like:
+	  // {
+	  //     id: id,
+	  //     name: entityName(local),
+	  //     details: merge.conflicts(),
+	  //     chosen: 1,
+	  //     choices: [
+	  //         choice(id, keepMine, forceLocal),
+	  //         choice(id, keepTheirs, forceRemote)
+	  //     ]
+	  // }
 
-	        // attempt asynchronous update of wikidata tag..
-	        var initGraph = context.graph();
-	        var initEntityIDs = _entityIDs;
 
-	        wikidata.entityByQID(_qid, function(err, entity) {
-	            if (err) { return; }
+	  conflicts.conflictList = function (_) {
+	    if (!arguments.length) return _conflictList;
+	    _conflictList = _;
+	    return conflicts;
+	  };
 
-	            // If graph has changed, we can't apply this update.
-	            if (context.graph() !== initGraph) { return; }
+	  conflicts.origChanges = function (_) {
+	    if (!arguments.length) return _origChanges;
+	    _origChanges = _;
+	    return conflicts;
+	  };
 
-	            if (!entity.sitelinks) { return; }
+	  conflicts.shownEntityIds = function () {
+	    if (_conflictList && typeof _shownConflictIndex === 'number') {
+	      return [_conflictList[_shownConflictIndex].id];
+	    }
 
-	            var langs = wikidata.languagesToQuery();
-	            // use the label and description languages as fallbacks
-	            ['labels', 'descriptions'].forEach(function(key) {
-	                if (!entity[key]) { return; }
+	    return [];
+	  };
 
-	                var valueLangs = Object.keys(entity[key]);
-	                if (valueLangs.length === 0) { return; }
-	                var valueLang = valueLangs[0];
+	  return utilRebind(conflicts, dispatch, 'on');
+	}
 
-	                if (langs.indexOf(valueLang) === -1) {
-	                    langs.push(valueLang);
-	                }
-	            });
+	function uiSectionEntityIssues(context) {
+	  // Does the user prefer to expand the active issue?  Useful for viewing tag diff.
+	  // Expand by default so first timers see it - #6408, #8143
+	  var preference = corePreferences('entity-issues.reference.expanded');
 
-	            var newWikipediaValue;
-
-	            if (_wikipediaKey) {
-	                var foundPreferred;
-	                for (var i in langs) {
-	                    var lang = langs[i];
-	                    var siteID = lang.replace('-', '_') + 'wiki';
-	                    if (entity.sitelinks[siteID]) {
-	                        foundPreferred = true;
-	                        newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title;
-	                        // use the first match
-	                        break;
-	                    }
-	                }
+	  var _expanded = preference === null ? true : preference === 'true';
 
-	                if (!foundPreferred) {
-	                    // No wikipedia sites available in the user's language or the fallback languages,
-	                    // default to any wikipedia sitelink
+	  var _entityIDs = [];
+	  var _issues = [];
 
-	                    var wikiSiteKeys = Object.keys(entity.sitelinks).filter(function(site) {
-	                        return site.endsWith('wiki');
-	                    });
+	  var _activeIssueID;
 
-	                    if (wikiSiteKeys.length === 0) {
-	                        // if no wikipedia pages are linked to this wikidata entity, delete that tag
-	                        newWikipediaValue = null;
-	                    } else {
-	                        var wikiLang = wikiSiteKeys[0].slice(0, -4).replace('_', '-');
-	                        var wikiTitle = entity.sitelinks[wikiSiteKeys[0]].title;
-	                        newWikipediaValue = wikiLang + ':' + wikiTitle;
-	                    }
-	                }
-	            }
+	  var section = uiSection('entity-issues', context).shouldDisplay(function () {
+	    return _issues.length > 0;
+	  }).label(function () {
+	    return _t.html('inspector.title_count', {
+	      title: {
+	        html: _t.html('issues.list_title')
+	      },
+	      count: _issues.length
+	    });
+	  }).disclosureContent(renderDisclosureContent);
+	  context.validator().on('validated.entity_issues', function () {
+	    // Refresh on validated events
+	    reloadIssues();
+	    section.reRender();
+	  }).on('focusedIssue.entity_issues', function (issue) {
+	    makeActiveIssue(issue.id);
+	  });
 
-	            if (newWikipediaValue) {
-	                newWikipediaValue = context.cleanTagValue(newWikipediaValue);
-	            }
+	  function reloadIssues() {
+	    _issues = context.validator().getSharedEntityIssues(_entityIDs, {
+	      includeDisabledRules: true
+	    });
+	  }
 
-	            if (typeof newWikipediaValue === 'undefined') { return; }
+	  function makeActiveIssue(issueID) {
+	    _activeIssueID = issueID;
+	    section.selection().selectAll('.issue-container').classed('active', function (d) {
+	      return d.id === _activeIssueID;
+	    });
+	  }
 
-	            var actions = initEntityIDs.map(function(entityID) {
-	                var entity = context.hasEntity(entityID);
-	                if (!entity) { return; }
+	  function renderDisclosureContent(selection) {
+	    selection.classed('grouped-items-area', true);
+	    _activeIssueID = _issues.length > 0 ? _issues[0].id : null;
+	    var containers = selection.selectAll('.issue-container').data(_issues, function (d) {
+	      return d.key;
+	    }); // Exit
 
-	                var currTags = Object.assign({}, entity.tags);  // shallow copy
-	                if (newWikipediaValue === null) {
-	                    if (!currTags[_wikipediaKey]) { return; }
+	    containers.exit().remove(); // Enter
 
-	                    delete currTags[_wikipediaKey];
-	                } else {
-	                    currTags[_wikipediaKey] = newWikipediaValue;
-	                }
+	    var containersEnter = containers.enter().append('div').attr('class', 'issue-container');
+	    var itemsEnter = containersEnter.append('div').attr('class', function (d) {
+	      return 'issue severity-' + d.severity;
+	    }).on('mouseover.highlight', function (d3_event, d) {
+	      // don't hover-highlight the selected entity
+	      var ids = d.entityIds.filter(function (e) {
+	        return _entityIDs.indexOf(e) === -1;
+	      });
+	      utilHighlightEntities(ids, true, context);
+	    }).on('mouseout.highlight', function (d3_event, d) {
+	      var ids = d.entityIds.filter(function (e) {
+	        return _entityIDs.indexOf(e) === -1;
+	      });
+	      utilHighlightEntities(ids, false, context);
+	    });
+	    var labelsEnter = itemsEnter.append('div').attr('class', 'issue-label');
+	    var textEnter = labelsEnter.append('button').attr('class', 'issue-text').on('click', function (d3_event, d) {
+	      makeActiveIssue(d.id); // expand only the clicked item
 
-	                return actionChangeTags(entityID, currTags);
-	            }).filter(Boolean);
+	      var extent = d.extent(context.graph());
 
-	            if (!actions.length) { return; }
+	      if (extent) {
+	        var setZoom = Math.max(context.map().zoom(), 19);
+	        context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
+	      }
+	    });
+	    textEnter.each(function (d) {
+	      var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
+	      select(this).call(svgIcon(iconName, 'issue-icon'));
+	    });
+	    textEnter.append('span').attr('class', 'issue-message');
+	    var infoButton = labelsEnter.append('button').attr('class', 'issue-info-button').attr('title', _t('icons.information')).call(svgIcon('#iD-icon-inspect'));
+	    infoButton.on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      this.blur(); // avoid keeping focus on the button - #4641
+
+	      var container = select(this.parentNode.parentNode.parentNode);
+	      var info = container.selectAll('.issue-info');
+	      var isExpanded = info.classed('expanded');
+	      _expanded = !isExpanded;
+	      corePreferences('entity-issues.reference.expanded', _expanded); // update preference
+
+	      if (isExpanded) {
+	        info.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
+	          info.classed('expanded', false);
+	        });
+	      } else {
+	        info.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1').on('end', function () {
+	          info.style('max-height', null);
+	        });
+	      }
+	    });
+	    itemsEnter.append('ul').attr('class', 'issue-fix-list');
+	    containersEnter.append('div').attr('class', 'issue-info' + (_expanded ? ' expanded' : '')).style('max-height', _expanded ? null : '0').style('opacity', _expanded ? '1' : '0').each(function (d) {
+	      if (typeof d.reference === 'function') {
+	        select(this).call(d.reference);
+	      } else {
+	        select(this).call(_t.append('inspector.no_documentation_key'));
+	      }
+	    }); // Update
 
-	            // Coalesce the update of wikidata tag into the previous tag change
-	            context.overwrite(
-	                function actionUpdateWikipediaTags(graph) {
-	                    actions.forEach(function(action) {
-	                        graph = action(graph);
-	                    });
-	                    return graph;
-	                },
-	                context.history().undoAnnotation()
-	            );
+	    containers = containers.merge(containersEnter).classed('active', function (d) {
+	      return d.id === _activeIssueID;
+	    });
+	    containers.selectAll('.issue-message').html(function (d) {
+	      return d.message(context);
+	    }); // fixes
+
+	    var fixLists = containers.selectAll('.issue-fix-list');
+	    var fixes = fixLists.selectAll('.issue-fix-item').data(function (d) {
+	      return d.fixes ? d.fixes(context) : [];
+	    }, function (fix) {
+	      return fix.id;
+	    });
+	    fixes.exit().remove();
+	    var fixesEnter = fixes.enter().append('li').attr('class', 'issue-fix-item');
+	    var buttons = fixesEnter.append('button').on('click', function (d3_event, d) {
+	      // not all fixes are actionable
+	      if (select(this).attr('disabled') || !d.onClick) return; // Don't run another fix for this issue within a second of running one
+	      // (Necessary for "Select a feature type" fix. Most fixes should only ever run once)
+
+	      if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) return;
+	      d.issue.dateLastRanFix = new Date(); // remove hover-highlighting
+
+	      utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
+	      new Promise(function (resolve, reject) {
+	        d.onClick(context, resolve, reject);
+
+	        if (d.onClick.length <= 1) {
+	          // if the fix doesn't take any completion parameters then consider it resolved
+	          resolve();
+	        }
+	      }).then(function () {
+	        // revalidate whenever the fix has finished running successfully
+	        context.validator().validate();
+	      });
+	    }).on('mouseover.highlight', function (d3_event, d) {
+	      utilHighlightEntities(d.entityIds, true, context);
+	    }).on('mouseout.highlight', function (d3_event, d) {
+	      utilHighlightEntities(d.entityIds, false, context);
+	    });
+	    buttons.each(function (d) {
+	      var iconName = d.icon || 'iD-icon-wrench';
 
-	            // do not dispatch.call('change') here, because entity_editor
-	            // changeTags() is not intended to be called asynchronously
-	        });
-	    }
+	      if (iconName.startsWith('maki')) {
+	        iconName += '-15';
+	      }
 
-	    function setLabelForEntity() {
-	        var label = '';
-	        if (_wikidataEntity) {
-	            label = entityPropertyForDisplay(_wikidataEntity, 'labels');
-	            if (label.length === 0) {
-	                label = _wikidataEntity.id.toString();
-	            }
-	        }
-	        utilGetSetValue(_searchInput, label);
-	    }
+	      select(this).call(svgIcon('#' + iconName, 'fix-icon'));
+	    });
+	    buttons.append('span').attr('class', 'fix-message').html(function (d) {
+	      return d.title;
+	    });
+	    fixesEnter.merge(fixes).selectAll('button').classed('actionable', function (d) {
+	      return d.onClick;
+	    }).attr('disabled', function (d) {
+	      return d.onClick ? null : 'true';
+	    }).attr('title', function (d) {
+	      if (d.disabledReason) {
+	        return d.disabledReason;
+	      }
 
+	      return null;
+	    });
+	  }
 
-	    wiki.tags = function(tags) {
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
 
-	        var isMixed = Array.isArray(tags[field.key]);
-	        _searchInput
-	            .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null)
-	            .attr('placeholder', isMixed ? _t('inspector.multiple_values') : '')
-	            .classed('mixed', isMixed);
+	    if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+	      _entityIDs = val;
+	      _activeIssueID = null;
+	      reloadIssues();
+	    }
 
-	        _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
+	    return section;
+	  };
 
-	        if (!/^Q[0-9]*$/.test(_qid)) {   // not a proper QID
-	            unrecognized();
-	            return;
-	        }
+	  return section;
+	}
 
-	        // QID value in correct format
-	        _wikiURL = 'https://wikidata.org/wiki/' + _qid;
-	        wikidata.entityByQID(_qid, function(err, entity) {
-	            if (err) {
-	                unrecognized();
-	                return;
-	            }
-	            _wikidataEntity = entity;
+	function uiPresetIcon() {
+	  var _preset;
 
-	            setLabelForEntity();
+	  var _geometry;
 
-	            var description = entityPropertyForDisplay(entity, 'descriptions');
+	  var _sizeClass = 'medium';
 
-	            _selection.select('button.wiki-link')
-	                .classed('disabled', false);
+	  function isSmall() {
+	    return _sizeClass === 'small';
+	  }
 
-	            _selection.select('.preset-wikidata-description')
-	                .style('display', function(){
-	                    return description.length > 0 ? 'flex' : 'none';
-	                })
-	                .select('input')
-	                .attr('value', description);
+	  function presetIcon(selection) {
+	    selection.each(render);
+	  }
 
-	            _selection.select('.preset-wikidata-identifier')
-	                .style('display', function(){
-	                    return entity.id ? 'flex' : 'none';
-	                })
-	                .select('input')
-	                .attr('value', entity.id);
-	        });
+	  function getIcon(p, geom) {
+	    if (isSmall() && p.isFallback && p.isFallback()) return 'iD-icon-' + p.id;
+	    if (p.icon) return p.icon;
+	    if (geom === 'line') return 'iD-other-line';
+	    if (geom === 'vertex') return p.isFallback() ? '' : 'temaki-vertex';
+	    if (isSmall() && geom === 'point') return '';
+	    return 'maki-marker-stroked';
+	  }
 
+	  function renderPointBorder(container, drawPoint) {
+	    var pointBorder = container.selectAll('.preset-icon-point-border').data(drawPoint ? [0] : []);
+	    pointBorder.exit().remove();
+	    var pointBorderEnter = pointBorder.enter();
+	    var w = 40;
+	    var h = 40;
+	    pointBorderEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-point-border').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h)).append('path').attr('transform', 'translate(11.5, 8)').attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+	    pointBorder = pointBorderEnter.merge(pointBorder);
+	  }
 
-	        // not a proper QID
-	        function unrecognized() {
-	            _wikidataEntity = null;
-	            setLabelForEntity();
+	  function renderCategoryBorder(container, category) {
+	    var categoryBorder = container.selectAll('.preset-icon-category-border').data(category ? [0] : []);
+	    categoryBorder.exit().remove();
+	    var categoryBorderEnter = categoryBorder.enter();
+	    var d = 60;
+	    var svgEnter = categoryBorderEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-category-border').attr('width', d).attr('height', d).attr('viewBox', "0 0 ".concat(d, " ").concat(d));
+	    svgEnter.append('path').attr('class', 'area').attr('d', 'M9.5,7.5 L25.5,7.5 L28.5,12.5 L49.5,12.5 C51.709139,12.5 53.5,14.290861 53.5,16.5 L53.5,43.5 C53.5,45.709139 51.709139,47.5 49.5,47.5 L10.5,47.5 C8.290861,47.5 6.5,45.709139 6.5,43.5 L6.5,12.5 L9.5,7.5 Z');
+	    categoryBorder = categoryBorderEnter.merge(categoryBorder);
 
-	            _selection.select('.preset-wikidata-description')
-	                .style('display', 'none');
-	            _selection.select('.preset-wikidata-identifier')
-	                .style('display', 'none');
+	    if (category) {
+	      categoryBorder.selectAll('path').attr('class', "area ".concat(category.id));
+	    }
+	  }
 
-	            _selection.select('button.wiki-link')
-	                .classed('disabled', true);
+	  function renderCircleFill(container, drawVertex) {
+	    var vertexFill = container.selectAll('.preset-icon-fill-vertex').data(drawVertex ? [0] : []);
+	    vertexFill.exit().remove();
+	    var vertexFillEnter = vertexFill.enter();
+	    var w = 60;
+	    var h = 60;
+	    var d = 40;
+	    vertexFillEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-fill-vertex').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h)).append('circle').attr('cx', w / 2).attr('cy', h / 2).attr('r', d / 2);
+	    vertexFill = vertexFillEnter.merge(vertexFill);
+	  }
 
-	            if (_qid && _qid !== '') {
-	                _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
-	            } else {
-	                _wikiURL = '';
-	            }
-	        }
-	    };
+	  function renderSquareFill(container, drawArea, tagClasses) {
+	    var fill = container.selectAll('.preset-icon-fill-area').data(drawArea ? [0] : []);
+	    fill.exit().remove();
+	    var fillEnter = fill.enter();
+	    var d = isSmall() ? 40 : 60;
+	    var w = d;
+	    var h = d;
+	    var l = d * 2 / 3;
+	    var c1 = (w - l) / 2;
+	    var c2 = c1 + l;
+	    fillEnter = fillEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-fill-area').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
+	    ['fill', 'stroke'].forEach(function (klass) {
+	      fillEnter.append('path').attr('d', "M".concat(c1, " ").concat(c1, " L").concat(c1, " ").concat(c2, " L").concat(c2, " ").concat(c2, " L").concat(c2, " ").concat(c1, " Z")).attr('class', "area ".concat(klass));
+	    });
+	    var rVertex = 2.5;
+	    [[c1, c1], [c1, c2], [c2, c2], [c2, c1]].forEach(function (point) {
+	      fillEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', rVertex);
+	    });
 
-	    function entityPropertyForDisplay(wikidataEntity, propKey) {
-	        if (!wikidataEntity[propKey]) { return ''; }
-	        var propObj = wikidataEntity[propKey];
-	        var langKeys = Object.keys(propObj);
-	        if (langKeys.length === 0) { return ''; }
-	        // sorted by priority, since we want to show the user's language first if possible
-	        var langs = wikidata.languagesToQuery();
-	        for (var i in langs) {
-	            var lang = langs[i];
-	            var valueObj = propObj[lang];
-	            if (valueObj && valueObj.value && valueObj.value.length > 0) { return valueObj.value; }
-	        }
-	        // default to any available value
-	        return propObj[langKeys[0]].value;
+	    if (!isSmall()) {
+	      var rMidpoint = 1.25;
+	      [[c1, w / 2], [c2, w / 2], [h / 2, c1], [h / 2, c2]].forEach(function (point) {
+	        fillEnter.append('circle').attr('class', 'midpoint').attr('cx', point[0]).attr('cy', point[1]).attr('r', rMidpoint);
+	      });
 	    }
 
+	    fill = fillEnter.merge(fill);
+	    fill.selectAll('path.stroke').attr('class', "area stroke ".concat(tagClasses));
+	    fill.selectAll('path.fill').attr('class', "area fill ".concat(tagClasses));
+	  }
+
+	  function renderLine(container, drawLine, tagClasses) {
+	    var line = container.selectAll('.preset-icon-line').data(drawLine ? [0] : []);
+	    line.exit().remove();
+	    var lineEnter = line.enter();
+	    var d = isSmall() ? 40 : 60; // draw the line parametrically
 
-	    wiki.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return wiki;
-	    };
+	    var w = d;
+	    var h = d;
+	    var y = Math.round(d * 0.72);
+	    var l = Math.round(d * 0.6);
+	    var r = 2.5;
+	    var x1 = (w - l) / 2;
+	    var x2 = x1 + l;
+	    lineEnter = lineEnter.append('svg').attr('class', 'preset-icon-line').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
+	    ['casing', 'stroke'].forEach(function (klass) {
+	      lineEnter.append('path').attr('d', "M".concat(x1, " ").concat(y, " L").concat(x2, " ").concat(y)).attr('class', "line ".concat(klass));
+	    });
+	    [[x1 - 1, y], [x2 + 1, y]].forEach(function (point) {
+	      lineEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);
+	    });
+	    line = lineEnter.merge(line);
+	    line.selectAll('path.stroke').attr('class', "line stroke ".concat(tagClasses));
+	    line.selectAll('path.casing').attr('class', "line casing ".concat(tagClasses));
+	  }
 
+	  function renderRoute(container, drawRoute, p) {
+	    var route = container.selectAll('.preset-icon-route').data(drawRoute ? [0] : []);
+	    route.exit().remove();
+	    var routeEnter = route.enter();
+	    var d = isSmall() ? 40 : 60; // draw the route parametrically
 
-	    wiki.focus = function() {
-	        _searchInput.node().focus();
-	    };
+	    var w = d;
+	    var h = d;
+	    var y1 = Math.round(d * 0.80);
+	    var y2 = Math.round(d * 0.68);
+	    var l = Math.round(d * 0.6);
+	    var r = 2;
+	    var x1 = (w - l) / 2;
+	    var x2 = x1 + l / 3;
+	    var x3 = x2 + l / 3;
+	    var x4 = x3 + l / 3;
+	    routeEnter = routeEnter.append('svg').attr('class', 'preset-icon-route').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
+	    ['casing', 'stroke'].forEach(function (klass) {
+	      routeEnter.append('path').attr('d', "M".concat(x1, " ").concat(y1, " L").concat(x2, " ").concat(y2)).attr('class', "segment0 line ".concat(klass));
+	      routeEnter.append('path').attr('d', "M".concat(x2, " ").concat(y2, " L").concat(x3, " ").concat(y1)).attr('class', "segment1 line ".concat(klass));
+	      routeEnter.append('path').attr('d', "M".concat(x3, " ").concat(y1, " L").concat(x4, " ").concat(y2)).attr('class', "segment2 line ".concat(klass));
+	    });
+	    [[x1, y1], [x2, y2], [x3, y1], [x4, y2]].forEach(function (point) {
+	      routeEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);
+	    });
+	    route = routeEnter.merge(route);
 
+	    if (drawRoute) {
+	      var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
+	      var segmentPresetIDs = routeSegments[routeType];
 
-	    return utilRebind(wiki, dispatch$1, 'on');
-	}
+	      for (var i in segmentPresetIDs) {
+	        var segmentPreset = _mainPresetIndex.item(segmentPresetIDs[i]);
+	        var segmentTagClasses = svgTagClasses().getClassesString(segmentPreset.tags, '');
+	        route.selectAll("path.stroke.segment".concat(i)).attr('class', "segment".concat(i, " line stroke ").concat(segmentTagClasses));
+	        route.selectAll("path.casing.segment".concat(i)).attr('class', "segment".concat(i, " line casing ").concat(segmentTagClasses));
+	      }
+	    }
+	  }
 
-	function uiFieldWikipedia(field, context) {
-	  var arguments$1 = arguments;
+	  function renderSvgIcon(container, picon, geom, isFramed, category, tagClasses) {
+	    var isMaki = picon && /^maki-/.test(picon);
+	    var isTemaki = picon && /^temaki-/.test(picon);
+	    var isFa = picon && /^fa[srb]-/.test(picon);
+	    var isiDIcon = picon && !(isMaki || isTemaki || isFa);
+	    var icon = container.selectAll('.preset-icon').data(picon ? [0] : []);
+	    icon.exit().remove();
+	    icon = icon.enter().append('div').attr('class', 'preset-icon').call(svgIcon('')).merge(icon);
+	    icon.attr('class', 'preset-icon ' + (geom ? geom + '-geom' : '')).classed('category', category).classed('framed', isFramed).classed('preset-icon-iD', isiDIcon);
+	    icon.selectAll('svg').attr('class', 'icon ' + picon + ' ' + (!isiDIcon && geom !== 'line' ? '' : tagClasses));
+	    var suffix = '';
+
+	    if (isMaki) {
+	      suffix = isSmall() && geom === 'point' ? '-11' : '-15';
+	    }
+
+	    icon.selectAll('use').attr('href', '#' + picon + suffix);
+	  }
+
+	  function renderImageIcon(container, imageURL) {
+	    var imageIcon = container.selectAll('img.image-icon').data(imageURL ? [0] : []);
+	    imageIcon.exit().remove();
+	    imageIcon = imageIcon.enter().append('img').attr('class', 'image-icon').on('load', function () {
+	      return container.classed('showing-img', true);
+	    }).on('error', function () {
+	      return container.classed('showing-img', false);
+	    }).merge(imageIcon);
+	    imageIcon.attr('src', imageURL);
+	  } // Route icons are drawn with a zigzag annotation underneath:
+	  //     o   o
+	  //    / \ /
+	  //   o   o
+	  // This dataset defines the styles that are used to draw the zigzag segments.
 
-	  var dispatch$1 = dispatch('change');
-	  var wikipedia = services.wikipedia;
-	  var wikidata = services.wikidata;
-	  var _langInput = select(null);
-	  var _titleInput = select(null);
-	  var _wikiURL = '';
-	  var _entityIDs;
-	  var _tags;
 
-	  var _dataWikipedia = [];
-	  _mainFileFetcher.get('wmf_sitematrix')
-	    .then(function (d) {
-	      _dataWikipedia = d;
-	      if (_tags) { updateForTags(_tags); }
-	    })
-	    .catch(function () { /* ignore */ });
+	  var routeSegments = {
+	    bicycle: ['highway/cycleway', 'highway/cycleway', 'highway/cycleway'],
+	    bus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
+	    trolleybus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
+	    detour: ['highway/tertiary', 'highway/residential', 'highway/unclassified'],
+	    ferry: ['route/ferry', 'route/ferry', 'route/ferry'],
+	    foot: ['highway/footway', 'highway/footway', 'highway/footway'],
+	    hiking: ['highway/path', 'highway/path', 'highway/path'],
+	    horse: ['highway/bridleway', 'highway/bridleway', 'highway/bridleway'],
+	    light_rail: ['railway/light_rail', 'railway/light_rail', 'railway/light_rail'],
+	    monorail: ['railway/monorail', 'railway/monorail', 'railway/monorail'],
+	    mtb: ['highway/path', 'highway/track', 'highway/bridleway'],
+	    pipeline: ['man_made/pipeline', 'man_made/pipeline', 'man_made/pipeline'],
+	    piste: ['piste/downhill', 'piste/hike', 'piste/nordic'],
+	    power: ['power/line', 'power/line', 'power/line'],
+	    road: ['highway/secondary', 'highway/primary', 'highway/trunk'],
+	    subway: ['railway/subway', 'railway/subway', 'railway/subway'],
+	    train: ['railway/rail', 'railway/rail', 'railway/rail'],
+	    tram: ['railway/tram', 'railway/tram', 'railway/tram'],
+	    waterway: ['waterway/stream', 'waterway/stream', 'waterway/stream']
+	  };
 
+	  function render() {
+	    var p = _preset.apply(this, arguments);
 
-	  var langCombo = uiCombobox(context, 'wikipedia-lang')
-	    .fetcher(function (value, callback) {
-	      var v = value.toLowerCase();
-	      callback(_dataWikipedia
-	        .filter(function (d) {
-	          return d[0].toLowerCase().indexOf(v) >= 0 ||
-	            d[1].toLowerCase().indexOf(v) >= 0 ||
-	            d[2].toLowerCase().indexOf(v) >= 0;
-	        })
-	        .map(function (d) { return ({ value: d[1] }); })
-	      );
-	    });
+	    var geom = _geometry ? _geometry.apply(this, arguments) : null;
 
-	  var titleCombo = uiCombobox(context, 'wikipedia-title')
-	    .fetcher(function (value, callback) {
-	      if (!value) {
-	        value = '';
-	        for (var i in _entityIDs) {
-	          var entity = context.hasEntity(_entityIDs[i]);
-	          if (entity.tags.name) {
-	            value = entity.tags.name;
-	            break;
-	          }
-	        }
+	    if (geom === 'relation' && p.tags && (p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route] || p.tags.type === 'waterway')) {
+	      geom = 'route';
+	    }
+
+	    var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+	    var isFallback = isSmall() && p.isFallback && p.isFallback();
+	    var imageURL = showThirdPartyIcons === 'true' && p.imageURL;
+	    var picon = getIcon(p, geom);
+	    var isCategory = !p.setTags;
+	    var drawPoint = picon && geom === 'point' && isSmall() && !isFallback;
+	    var drawVertex = picon !== null && geom === 'vertex' && (!isSmall() || !isFallback);
+	    var drawLine = picon && geom === 'line' && !isFallback && !isCategory;
+	    var drawArea = picon && geom === 'area' && !isFallback && !isCategory;
+	    var drawRoute = picon && geom === 'route';
+	    var isFramed = drawVertex || drawArea || drawLine || drawRoute || isCategory;
+	    var tags = !isCategory ? p.setTags({}, geom) : {};
+
+	    for (var k in tags) {
+	      if (tags[k] === '*') {
+	        tags[k] = 'yes';
 	      }
-	      var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
-	      searchfn(language()[2], value, function (query, data) {
-	        callback( data.map(function (d) { return ({ value: d }); }) );
-	      });
-	    });
+	    }
 
+	    var tagClasses = svgTagClasses().getClassesString(tags, '');
+	    var selection = select(this);
+	    var container = selection.selectAll('.preset-icon-container').data([0]);
+	    container = container.enter().append('div').attr('class', "preset-icon-container ".concat(_sizeClass)).merge(container);
+	    container.classed('showing-img', !!imageURL).classed('fallback', isFallback);
+	    renderCategoryBorder(container, isCategory && p);
+	    renderPointBorder(container, drawPoint);
+	    renderCircleFill(container, drawVertex);
+	    renderSquareFill(container, drawArea, tagClasses);
+	    renderLine(container, drawLine, tagClasses);
+	    renderRoute(container, drawRoute, p);
+	    renderSvgIcon(container, picon, geom, isFramed, isCategory, tagClasses);
+	    renderImageIcon(container, imageURL);
+	  }
+
+	  presetIcon.preset = function (val) {
+	    if (!arguments.length) return _preset;
+	    _preset = utilFunctor(val);
+	    return presetIcon;
+	  };
 
-	  function wiki(selection) {
-	    var wrap = selection.selectAll('.form-field-input-wrap')
-	      .data([0]);
+	  presetIcon.geometry = function (val) {
+	    if (!arguments.length) return _geometry;
+	    _geometry = utilFunctor(val);
+	    return presetIcon;
+	  };
 
-	    wrap = wrap.enter()
-	      .append('div')
-	      .attr('class', ("form-field-input-wrap form-field-input-" + (field.type)))
-	      .merge(wrap);
+	  presetIcon.sizeClass = function (val) {
+	    if (!arguments.length) return _sizeClass;
+	    _sizeClass = val;
+	    return presetIcon;
+	  };
 
+	  return presetIcon;
+	}
 
-	    var langContainer = wrap.selectAll('.wiki-lang-container')
-	      .data([0]);
+	function uiSectionFeatureType(context) {
+	  var dispatch = dispatch$8('choose');
+	  var _entityIDs = [];
+	  var _presets = [];
+
+	  var _tagReference;
+
+	  var section = uiSection('feature-type', context).label(_t.html('inspector.feature_type')).disclosureContent(renderDisclosureContent);
+
+	  function renderDisclosureContent(selection) {
+	    selection.classed('preset-list-item', true);
+	    selection.classed('mixed-types', _presets.length > 1);
+	    var presetButtonWrap = selection.selectAll('.preset-list-button-wrap').data([0]).enter().append('div').attr('class', 'preset-list-button-wrap');
+	    var presetButton = presetButtonWrap.append('button').attr('class', 'preset-list-button preset-reset').call(uiTooltip().title(_t.html('inspector.back_tooltip')).placement('bottom'));
+	    presetButton.append('div').attr('class', 'preset-icon-container');
+	    presetButton.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+	    presetButtonWrap.append('div').attr('class', 'accessory-buttons');
+	    var tagReferenceBodyWrap = selection.selectAll('.tag-reference-body-wrap').data([0]);
+	    tagReferenceBodyWrap = tagReferenceBodyWrap.enter().append('div').attr('class', 'tag-reference-body-wrap').merge(tagReferenceBodyWrap); // update header
+
+	    if (_tagReference) {
+	      selection.selectAll('.preset-list-button-wrap .accessory-buttons').style('display', _presets.length === 1 ? null : 'none').call(_tagReference.button);
+	      tagReferenceBodyWrap.style('display', _presets.length === 1 ? null : 'none').call(_tagReference.body);
+	    }
+
+	    selection.selectAll('.preset-reset').on('click', function () {
+	      dispatch.call('choose', this, _presets);
+	    }).on('pointerdown pointerup mousedown mouseup', function (d3_event) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	    });
+	    var geometries = entityGeometries();
+	    selection.select('.preset-list-item button').call(uiPresetIcon().geometry(_presets.length === 1 ? geometries.length === 1 && geometries[0] : null).preset(_presets.length === 1 ? _presets[0] : _mainPresetIndex.item('point')));
+	    var names = _presets.length === 1 ? [_presets[0].nameLabel(), _presets[0].subtitleLabel()].filter(Boolean) : [_t('inspector.multiple_types')];
+	    var label = selection.select('.label-inner');
+	    var nameparts = label.selectAll('.namepart').data(names, function (d) {
+	      return d;
+	    });
+	    nameparts.exit().remove();
+	    nameparts.enter().append('div').attr('class', 'namepart').html(function (d) {
+	      return d;
+	    });
+	  }
 
-	    langContainer = langContainer.enter()
-	      .append('div')
-	      .attr('class', 'wiki-lang-container')
-	      .merge(langContainer);
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return section;
+	  };
 
+	  section.presets = function (val) {
+	    if (!arguments.length) return _presets; // don't reload the same preset
 
-	    _langInput = langContainer.selectAll('input.wiki-lang')
-	      .data([0]);
+	    if (!utilArrayIdentical(val, _presets)) {
+	      _presets = val;
 
-	    _langInput = _langInput.enter()
-	      .append('input')
-	      .attr('type', 'text')
-	      .attr('class', 'wiki-lang')
-	      .attr('placeholder', _t('translate.localized_translation_language'))
-	      .call(utilNoAuto)
-	      .call(langCombo)
-	      .merge(_langInput);
+	      if (_presets.length === 1) {
+	        _tagReference = uiTagReference(_presets[0].reference()).showing(false);
+	      }
+	    }
 
-	    utilGetSetValue(_langInput, language()[1]);
+	    return section;
+	  };
 
-	    _langInput
-	      .on('blur', changeLang)
-	      .on('change', changeLang);
+	  function entityGeometries() {
+	    var counts = {};
 
+	    for (var i in _entityIDs) {
+	      var geometry = context.graph().geometry(_entityIDs[i]);
+	      if (!counts[geometry]) counts[geometry] = 0;
+	      counts[geometry] += 1;
+	    }
 
-	    var titleContainer = wrap.selectAll('.wiki-title-container')
-	      .data([0]);
+	    return Object.keys(counts).sort(function (geom1, geom2) {
+	      return counts[geom2] - counts[geom1];
+	    });
+	  }
 
-	    titleContainer = titleContainer.enter()
-	      .append('div')
-	      .attr('class', 'wiki-title-container')
-	      .merge(titleContainer);
+	  return utilRebind(section, dispatch, 'on');
+	}
 
-	    _titleInput = titleContainer.selectAll('input.wiki-title')
-	      .data([0]);
+	function uiSectionPresetFields(context) {
+	  var section = uiSection('preset-fields', context).label(_t.html('inspector.fields')).disclosureContent(renderDisclosureContent);
+	  var dispatch = dispatch$8('change', 'revert');
+	  var formFields = uiFormFields(context);
 
-	    _titleInput = _titleInput.enter()
-	      .append('input')
-	      .attr('type', 'text')
-	      .attr('class', 'wiki-title')
-	      .attr('id', field.domId)
-	      .call(utilNoAuto)
-	      .call(titleCombo)
-	      .merge(_titleInput);
+	  var _state;
 
-	    _titleInput
-	      .on('blur', blur)
-	      .on('change', change);
+	  var _fieldsArr;
 
+	  var _presets = [];
 
-	    var link = titleContainer.selectAll('.wiki-link')
-	      .data([0]);
+	  var _tags;
 
-	    link = link.enter()
-	      .append('button')
-	      .attr('class', 'form-field-button wiki-link')
-	      .attr('tabindex', -1)
-	      .attr('title', _t('icons.view_on', { domain: 'wikipedia.org' }))
-	      .call(svgIcon('#iD-icon-out-link'))
-	      .merge(link);
+	  var _entityIDs;
 
-	    link
-	      .on('click', function () {
-	        event.preventDefault();
-	        if (_wikiURL) { window.open(_wikiURL, '_blank'); }
+	  function renderDisclosureContent(selection) {
+	    if (!_fieldsArr) {
+	      var graph = context.graph();
+	      var geometries = Object.keys(_entityIDs.reduce(function (geoms, entityID) {
+	        geoms[graph.entity(entityID).geometry(graph)] = true;
+	        return geoms;
+	      }, {}));
+	      var presetsManager = _mainPresetIndex;
+	      var allFields = [];
+	      var allMoreFields = [];
+	      var sharedTotalFields;
+
+	      _presets.forEach(function (preset) {
+	        var fields = preset.fields();
+	        var moreFields = preset.moreFields();
+	        allFields = utilArrayUnion(allFields, fields);
+	        allMoreFields = utilArrayUnion(allMoreFields, moreFields);
+
+	        if (!sharedTotalFields) {
+	          sharedTotalFields = utilArrayUnion(fields, moreFields);
+	        } else {
+	          sharedTotalFields = sharedTotalFields.filter(function (field) {
+	            return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
+	          });
+	        }
 	      });
-	  }
 
+	      var sharedFields = allFields.filter(function (field) {
+	        return sharedTotalFields.indexOf(field) !== -1;
+	      });
+	      var sharedMoreFields = allMoreFields.filter(function (field) {
+	        return sharedTotalFields.indexOf(field) !== -1;
+	      });
+	      _fieldsArr = [];
+	      sharedFields.forEach(function (field) {
+	        if (field.matchAllGeometry(geometries)) {
+	          _fieldsArr.push(uiField(context, field, _entityIDs));
+	        }
+	      });
+	      var singularEntity = _entityIDs.length === 1 && graph.hasEntity(_entityIDs[0]);
 
-	  function language() {
-	    var value = utilGetSetValue(_langInput).toLowerCase();
-	    var locale = _mainLocalizer.localeCode().toLowerCase();
-	    var localeLanguage;
-	    return _dataWikipedia.find(function (d) {
-	      if (d[2] === locale) { localeLanguage = d; }
-	      return d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value;
-	    }) || localeLanguage || ['English', 'English', 'en'];
-	  }
+	      if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
+	        _fieldsArr.push(uiField(context, presetsManager.field('restrictions'), _entityIDs));
+	      }
 
+	      var additionalFields = utilArrayUnion(sharedMoreFields, presetsManager.universal());
+	      additionalFields.sort(function (field1, field2) {
+	        return field1.label().localeCompare(field2.label(), _mainLocalizer.localeCode());
+	      });
+	      additionalFields.forEach(function (field) {
+	        if (sharedFields.indexOf(field) === -1 && field.matchAllGeometry(geometries)) {
+	          _fieldsArr.push(uiField(context, field, _entityIDs, {
+	            show: false
+	          }));
+	        }
+	      });
 
-	  function changeLang() {
-	    utilGetSetValue(_langInput, language()[1]);
-	    change(true);
-	  }
+	      _fieldsArr.forEach(function (field) {
+	        field.on('change', function (t, onInput) {
+	          dispatch.call('change', field, _entityIDs, t, onInput);
+	        }).on('revert', function (keys) {
+	          dispatch.call('revert', field, keys);
+	        });
+	      });
+	    }
 
+	    _fieldsArr.forEach(function (field) {
+	      field.state(_state).tags(_tags);
+	    });
 
-	  function blur() {
-	    change(true);
+	    selection.call(formFields.fieldsArr(_fieldsArr).state(_state).klass('grouped-items-area'));
+	    selection.selectAll('.wrap-form-field input').on('keydown', function (d3_event) {
+	      // if user presses enter, and combobox is not active, accept edits..
+	      if (d3_event.keyCode === 13 && // ↩ Return
+	      context.container().select('.combobox').empty()) {
+	        context.enter(modeBrowse(context));
+	      }
+	    });
 	  }
 
+	  section.presets = function (val) {
+	    if (!arguments.length) return _presets;
 
-	  function change(skipWikidata) {
-	    var value = utilGetSetValue(_titleInput);
-	    var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);
-	    var l = m && _dataWikipedia.find(function (d) { return m[1] === d[2]; });
-	    var syncTags = {};
-
-	    if (l) {
-	      // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
-	      value = decodeURIComponent(m[2]).replace(/_/g, ' ');
-	      if (m[3]) {
-	        var anchor;
-	        // try {
-	        // leave this out for now - #6232
-	          // Best-effort `anchordecode:` implementation
-	          // anchor = decodeURIComponent(m[3].replace(/\.([0-9A-F]{2})/g, '%$1'));
-	        // } catch (e) {
-	        anchor = decodeURIComponent(m[3]);
-	        // }
-	        value += '#' + anchor.replace(/_/g, ' ');
-	      }
-	      value = value.slice(0, 1).toUpperCase() + value.slice(1);
-	      utilGetSetValue(_langInput, l[1]);
-	      utilGetSetValue(_titleInput, value);
+	    if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
+	      _presets = val;
+	      _fieldsArr = null;
 	    }
 
-	    if (value) {
-	      syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
-	    } else {
-	      syncTags.wikipedia = undefined;
-	    }
+	    return section;
+	  };
 
-	    dispatch$1.call('change', this, syncTags);
+	  section.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return section;
+	  };
 
+	  section.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val; // Don't reset _fieldsArr here.
 
-	    if (skipWikidata || !value || !language()[2]) { return; }
+	    return section;
+	  };
 
-	    // attempt asynchronous update of wikidata tag..
-	    var initGraph = context.graph();
-	    var initEntityIDs = _entityIDs;
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
 
-	    wikidata.itemsByTitle(language()[2], value, function (err, data) {
-	      if (err || !data || !Object.keys(data).length) { return; }
+	    if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
+	      _entityIDs = val;
+	      _fieldsArr = null;
+	    }
 
-	      // If graph has changed, we can't apply this update.
-	      if (context.graph() !== initGraph) { return; }
+	    return section;
+	  };
 
-	      var qids = Object.keys(data);
-	      var value = qids && qids.find(function (id) { return id.match(/^Q\d+$/); });
+	  return utilRebind(section, dispatch, 'on');
+	}
 
-	      var actions = initEntityIDs.map(function (entityID) {
-	        var entity = context.entity(entityID).tags;
-	        var currTags = Object.assign({}, entity);  // shallow copy
-	        if (currTags.wikidata !== value) {
-	            currTags.wikidata = value;
-	            return actionChangeTags(entityID, currTags);
-	        }
-	      }).filter(Boolean);
+	function uiSectionRawMemberEditor(context) {
+	  var section = uiSection('raw-member-editor', context).shouldDisplay(function () {
+	    if (!_entityIDs || _entityIDs.length !== 1) return false;
+	    var entity = context.hasEntity(_entityIDs[0]);
+	    return entity && entity.type === 'relation';
+	  }).label(function () {
+	    var entity = context.hasEntity(_entityIDs[0]);
+	    if (!entity) return '';
+	    var gt = entity.members.length > _maxMembers ? '>' : '';
+	    var count = gt + entity.members.slice(0, _maxMembers).length;
+	    return _t.html('inspector.title_count', {
+	      title: {
+	        html: _t.html('inspector.members')
+	      },
+	      count: count
+	    });
+	  }).disclosureContent(renderDisclosureContent);
+	  var taginfo = services.taginfo;
 
-	      if (!actions.length) { return; }
+	  var _entityIDs;
 
-	      // Coalesce the update of wikidata tag into the previous tag change
-	      context.overwrite(
-	        function actionUpdateWikidataTags(graph) {
-	          actions.forEach(function(action) {
-	            graph = action(graph);
-	          });
-	          return graph;
-	        },
-	        context.history().undoAnnotation()
-	      );
+	  var _maxMembers = 1000;
 
-	      // do not dispatch.call('change') here, because entity_editor
-	      // changeTags() is not intended to be called asynchronously
+	  function downloadMember(d3_event, d) {
+	    d3_event.preventDefault(); // display the loading indicator
+
+	    select(this.parentNode).classed('tag-reference-loading', true);
+	    context.loadEntity(d.id, function () {
+	      section.reRender();
 	    });
 	  }
 
+	  function zoomToMember(d3_event, d) {
+	    d3_event.preventDefault();
+	    var entity = context.entity(d.id);
+	    context.map().zoomToEase(entity); // highlight the feature in case it wasn't previously on-screen
 
-	  wiki.tags = function (tags) {
-	    _tags = tags;
-	    updateForTags(tags);
-	  };
-
-	  function updateForTags(tags) {
+	    utilHighlightEntities([d.id], true, context);
+	  }
 
-	    var value = typeof tags[field.key] === 'string' ? tags[field.key] : '';
-	    var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
-	    var l = m && _dataWikipedia.find(function (d) { return m[1] === d[2]; });
-	    var anchor = m && m[3];
+	  function selectMember(d3_event, d) {
+	    d3_event.preventDefault(); // remove the hover-highlight styling
 
-	    // value in correct format
-	    if (l) {
-	      utilGetSetValue(_langInput, l[1]);
-	      utilGetSetValue(_titleInput, m[2] + (anchor ? ('#' + anchor) : ''));
-	      if (anchor) {
-	        try {
-	          // Best-effort `anchorencode:` implementation
-	          anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
-	        } catch (e) {
-	          anchor = anchor.replace(/ /g, '_');
-	        }
-	      }
-	      _wikiURL = 'https://' + m[1] + '.wikipedia.org/wiki/' +
-	        m[2].replace(/ /g, '_') + (anchor ? ('#' + anchor) : '');
+	    utilHighlightEntities([d.id], false, context);
+	    var entity = context.entity(d.id);
+	    var mapExtent = context.map().extent();
 
-	    // unrecognized value format
-	    } else {
-	      utilGetSetValue(_titleInput, value);
-	      if (value && value !== '') {
-	        utilGetSetValue(_langInput, '');
-	        _wikiURL = "https://en.wikipedia.org/wiki/Special:Search?search=" + value;
-	      } else {
-	        _wikiURL = '';
-	      }
+	    if (!entity.intersects(mapExtent, context.graph())) {
+	      // zoom to the entity if its extent is not visible now
+	      context.map().zoomToEase(entity);
 	    }
-	  }
 
+	    context.enter(modeSelect(context, [d.id]));
+	  }
 
-	  wiki.entityIDs = function (val) {
-	    if (!arguments$1.length) { return _entityIDs; }
-	    _entityIDs = val;
-	    return wiki;
-	  };
+	  function changeRole(d3_event, d) {
+	    var oldRole = d.role;
+	    var newRole = context.cleanRelationRole(select(this).property('value'));
 
+	    if (oldRole !== newRole) {
+	      var member = {
+	        id: d.id,
+	        type: d.type,
+	        role: newRole
+	      };
+	      context.perform(actionChangeMember(d.relation.id, member, d.index), _t('operations.change_role.annotation', {
+	        n: 1
+	      }));
+	      context.validator().validate();
+	    }
+	  }
 
-	  wiki.focus = function () {
-	    _titleInput.node().focus();
-	  };
+	  function deleteMember(d3_event, d) {
+	    // remove the hover-highlight styling
+	    utilHighlightEntities([d.id], false, context);
+	    context.perform(actionDeleteMember(d.relation.id, d.index), _t('operations.delete_member.annotation', {
+	      n: 1
+	    }));
 
+	    if (!context.hasEntity(d.relation.id)) {
+	      // Removing the last member will also delete the relation.
+	      // If this happens we need to exit the selection mode
+	      context.enter(modeBrowse(context));
+	    } else {
+	      // Changing the mode also runs `validate`, but otherwise we need to
+	      // rerun it manually
+	      context.validator().validate();
+	    }
+	  }
+
+	  function renderDisclosureContent(selection) {
+	    var entityID = _entityIDs[0];
+	    var memberships = [];
+	    var entity = context.entity(entityID);
+	    entity.members.slice(0, _maxMembers).forEach(function (member, index) {
+	      memberships.push({
+	        index: index,
+	        id: member.id,
+	        type: member.type,
+	        role: member.role,
+	        relation: entity,
+	        member: context.hasEntity(member.id),
+	        domId: utilUniqueDomId(entityID + '-member-' + index)
+	      });
+	    });
+	    var list = selection.selectAll('.member-list').data([0]);
+	    list = list.enter().append('ul').attr('class', 'member-list').merge(list);
+	    var items = list.selectAll('li').data(memberships, function (d) {
+	      return osmEntity.key(d.relation) + ',' + d.index + ',' + (d.member ? osmEntity.key(d.member) : 'incomplete');
+	    });
+	    items.exit().each(unbind).remove();
+	    var itemsEnter = items.enter().append('li').attr('class', 'member-row form-field').classed('member-incomplete', function (d) {
+	      return !d.member;
+	    });
+	    itemsEnter.each(function (d) {
+	      var item = select(this);
+	      var label = item.append('label').attr('class', 'field-label').attr('for', d.domId);
+
+	      if (d.member) {
+	        // highlight the member feature in the map while hovering on the list item
+	        item.on('mouseover', function () {
+	          utilHighlightEntities([d.id], true, context);
+	        }).on('mouseout', function () {
+	          utilHighlightEntities([d.id], false, context);
+	        });
+	        var labelLink = label.append('span').attr('class', 'label-text').append('a').attr('href', '#').on('click', selectMember);
+	        labelLink.append('span').attr('class', 'member-entity-type').text(function (d) {
+	          var matched = _mainPresetIndex.match(d.member, context.graph());
+	          return matched && matched.name() || utilDisplayType(d.member.id);
+	        });
+	        labelLink.append('span').attr('class', 'member-entity-name').text(function (d) {
+	          return utilDisplayName(d.member);
+	        });
+	        label.append('button').attr('title', _t('icons.remove')).attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete'));
+	        label.append('button').attr('class', 'member-zoom').attr('title', _t('icons.zoom_to')).call(svgIcon('#iD-icon-framed-dot', 'monochrome')).on('click', zoomToMember);
+	      } else {
+	        var labelText = label.append('span').attr('class', 'label-text');
+	        labelText.append('span').attr('class', 'member-entity-type').call(_t.append('inspector.' + d.type, {
+	          id: d.id
+	        }));
+	        labelText.append('span').attr('class', 'member-entity-name').call(_t.append('inspector.incomplete', {
+	          id: d.id
+	        }));
+	        label.append('button').attr('class', 'member-download').attr('title', _t('icons.download')).call(svgIcon('#iD-icon-load')).on('click', downloadMember);
+	      }
+	    });
+	    var wrapEnter = itemsEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
+	    wrapEnter.append('input').attr('class', 'member-role').attr('id', function (d) {
+	      return d.domId;
+	    }).property('type', 'text').attr('placeholder', _t('inspector.role')).call(utilNoAuto);
+
+	    if (taginfo) {
+	      wrapEnter.each(bindTypeahead);
+	    } // update
+
+
+	    items = items.merge(itemsEnter).order();
+	    items.select('input.member-role').property('value', function (d) {
+	      return d.role;
+	    }).on('blur', changeRole).on('change', changeRole);
+	    items.select('button.member-delete').on('click', deleteMember);
+	    var dragOrigin, targetIndex;
+	    items.call(d3_drag().on('start', function (d3_event) {
+	      dragOrigin = {
+	        x: d3_event.x,
+	        y: d3_event.y
+	      };
+	      targetIndex = null;
+	    }).on('drag', function (d3_event) {
+	      var x = d3_event.x - dragOrigin.x,
+	          y = d3_event.y - dragOrigin.y;
+	      if (!select(this).classed('dragging') && // don't display drag until dragging beyond a distance threshold
+	      Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) return;
+	      var index = items.nodes().indexOf(this);
+	      select(this).classed('dragging', true);
+	      targetIndex = null;
+	      selection.selectAll('li.member-row').style('transform', function (d2, index2) {
+	        var node = select(this).node();
+
+	        if (index === index2) {
+	          return 'translate(' + x + 'px, ' + y + 'px)';
+	        } else if (index2 > index && d3_event.y > node.offsetTop) {
+	          if (targetIndex === null || index2 > targetIndex) {
+	            targetIndex = index2;
+	          }
 
-	  return utilRebind(wiki, dispatch$1, 'on');
-	}
+	          return 'translateY(-100%)';
+	        } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
+	          if (targetIndex === null || index2 < targetIndex) {
+	            targetIndex = index2;
+	          }
 
-	uiFieldWikipedia.supportsMultiselection = false;
+	          return 'translateY(100%)';
+	        }
 
-	var uiFields = {
-	    access: uiFieldAccess,
-	    address: uiFieldAddress,
-	    check: uiFieldCheck,
-	    combo: uiFieldCombo,
-	    cycleway: uiFieldCycleway,
-	    defaultCheck: uiFieldCheck,
-	    email: uiFieldText,
-	    identifier: uiFieldText,
-	    lanes: uiFieldLanes,
-	    localized: uiFieldLocalized,
-	    maxspeed: uiFieldMaxspeed,
-	    multiCombo: uiFieldCombo,
-	    networkCombo: uiFieldCombo,
-	    number: uiFieldText,
-	    onewayCheck: uiFieldCheck,
-	    radio: uiFieldRadio,
-	    restrictions: uiFieldRestrictions,
-	    semiCombo: uiFieldCombo,
-	    structureRadio: uiFieldRadio,
-	    tel: uiFieldText,
-	    text: uiFieldText,
-	    textarea: uiFieldTextarea,
-	    typeCombo: uiFieldCombo,
-	    url: uiFieldText,
-	    wikidata: uiFieldWikidata,
-	    wikipedia: uiFieldWikipedia
-	};
+	        return null;
+	      });
+	    }).on('end', function (d3_event, d) {
+	      if (!select(this).classed('dragging')) return;
+	      var index = items.nodes().indexOf(this);
+	      select(this).classed('dragging', false);
+	      selection.selectAll('li.member-row').style('transform', null);
+
+	      if (targetIndex !== null) {
+	        // dragged to a new position, reorder
+	        context.perform(actionMoveMember(d.relation.id, index, targetIndex), _t('operations.reorder_members.annotation'));
+	        context.validator().validate();
+	      }
+	    }));
 
-	function uiField(context, presetField, entityIDs, options) {
-	    options = Object.assign({
-	        show: true,
-	        wrap: true,
-	        remove: true,
-	        revert: true,
-	        info: true
-	    }, options);
+	    function bindTypeahead(d) {
+	      var row = select(this);
+	      var role = row.selectAll('input.member-role');
+	      var origValue = role.property('value');
 
-	    var dispatch$1 = dispatch('change', 'revert');
-	    var field = Object.assign({}, presetField);   // shallow copy
-	    field.domId = utilUniqueDomId('form-field-' + field.safeid);
-	    var _show = options.show;
-	    var _state = '';
-	    var _tags = {};
+	      function sort(value, data) {
+	        var sameletter = [];
+	        var other = [];
 
-	    var _locked = false;
-	    var _lockedTip = uiTooltip()
-	        .title(_t('inspector.lock.suggestion', { label: field.label }))
-	        .placement('bottom');
+	        for (var i = 0; i < data.length; i++) {
+	          if (data[i].value.substring(0, value.length) === value) {
+	            sameletter.push(data[i]);
+	          } else {
+	            other.push(data[i]);
+	          }
+	        }
 
+	        return sameletter.concat(other);
+	      }
 
-	    field.keys = field.keys || [field.key];
+	      role.call(uiCombobox(context, 'member-role').fetcher(function (role, callback) {
+	        // The `geometry` param is used in the `taginfo.js` interface for
+	        // filtering results, as a key into the `tag_members_fractions`
+	        // object.  If we don't know the geometry because the member is
+	        // not yet downloaded, it's ok to guess based on type.
+	        var geometry;
+
+	        if (d.member) {
+	          geometry = context.graph().geometry(d.member.id);
+	        } else if (d.type === 'relation') {
+	          geometry = 'relation';
+	        } else if (d.type === 'way') {
+	          geometry = 'line';
+	        } else {
+	          geometry = 'point';
+	        }
 
-	    // only create the fields that are actually being shown
-	    if (_show && !field.impl) {
-	        createField();
+	        var rtype = entity.tags.type;
+	        taginfo.roles({
+	          debounce: true,
+	          rtype: rtype || '',
+	          geometry: geometry,
+	          query: role
+	        }, function (err, data) {
+	          if (!err) callback(sort(role, data));
+	        });
+	      }).on('cancel', function () {
+	        role.property('value', origValue);
+	      }));
 	    }
 
-	    // Creates the field.. This is done lazily,
-	    // once we know that the field will be shown.
-	    function createField() {
-	        field.impl = uiFields[field.type](field, context)
-	            .on('change', function(t, onInput) {
-	                dispatch$1.call('change', field, t, onInput);
-	            });
-
-	        if (entityIDs) {
-	            field.entityIDs = entityIDs;
-	            // if this field cares about the entities, pass them along
-	            if (field.impl.entityIDs) {
-	                field.impl.entityIDs(entityIDs);
-	            }
-	        }
+	    function unbind() {
+	      var row = select(this);
+	      row.selectAll('input.member-role').call(uiCombobox.off, context);
 	    }
+	  }
 
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return section;
+	  };
 
-	    function isModified() {
-	        if (!entityIDs || !entityIDs.length) { return false; }
-	        return entityIDs.some(function(entityID) {
-	            var original = context.graph().base().entities[entityID];
-	            var latest = context.graph().entity(entityID);
-	            return field.keys.some(function(key) {
-	                return original ? latest.tags[key] !== original.tags[key] : latest.tags[key];
-	            });
-	        });
-	    }
+	  return section;
+	}
 
+	function actionDeleteMembers(relationId, memberIndexes) {
+	  return function (graph) {
+	    // Remove the members in descending order so removals won't shift what members
+	    // are at the remaining indexes
+	    memberIndexes.sort(function (a, b) {
+	      return b - a;
+	    });
 
-	    function tagsContainFieldKey() {
-	        return field.keys.some(function(key) {
-	            if (field.type === 'multiCombo') {
-	                for (var tagKey in _tags) {
-	                    if (tagKey.indexOf(key) === 0) {
-	                        return true;
-	                    }
-	                }
-	                return false;
-	            }
-	            return _tags[key] !== undefined;
-	        });
+	    for (var i in memberIndexes) {
+	      graph = actionDeleteMember(relationId, memberIndexes[i])(graph);
 	    }
 
+	    return graph;
+	  };
+	}
+
+	function uiSectionRawMembershipEditor(context) {
+	  var section = uiSection('raw-membership-editor', context).shouldDisplay(function () {
+	    return _entityIDs && _entityIDs.length;
+	  }).label(function () {
+	    var parents = getSharedParentRelations();
+	    var gt = parents.length > _maxMemberships ? '>' : '';
+	    var count = gt + parents.slice(0, _maxMemberships).length;
+	    return _t.html('inspector.title_count', {
+	      title: {
+	        html: _t.html('inspector.relations')
+	      },
+	      count: count
+	    });
+	  }).disclosureContent(renderDisclosureContent);
+	  var taginfo = services.taginfo;
+	  var nearbyCombo = uiCombobox(context, 'parent-relation').minItems(1).fetcher(fetchNearbyRelations).itemsMouseEnter(function (d3_event, d) {
+	    if (d.relation) utilHighlightEntities([d.relation.id], true, context);
+	  }).itemsMouseLeave(function (d3_event, d) {
+	    if (d.relation) utilHighlightEntities([d.relation.id], false, context);
+	  });
+	  var _inChange = false;
+	  var _entityIDs = [];
 
-	    function revert(d) {
-	        event.stopPropagation();
-	        event.preventDefault();
-	        if (!entityIDs || _locked) { return; }
+	  var _showBlank;
 
-	        dispatch$1.call('revert', d, d.keys);
-	    }
+	  var _maxMemberships = 1000;
 
+	  function getSharedParentRelations() {
+	    var parents = [];
 
-	    function remove(d) {
-	        event.stopPropagation();
-	        event.preventDefault();
-	        if (_locked) { return; }
+	    for (var i = 0; i < _entityIDs.length; i++) {
+	      var entity = context.graph().hasEntity(_entityIDs[i]);
+	      if (!entity) continue;
 
-	        var t = {};
-	        d.keys.forEach(function(key) {
-	            t[key] = undefined;
-	        });
+	      if (i === 0) {
+	        parents = context.graph().parentRelations(entity);
+	      } else {
+	        parents = utilArrayIntersection(parents, context.graph().parentRelations(entity));
+	      }
 
-	        dispatch$1.call('change', d, t);
+	      if (!parents.length) break;
 	    }
 
+	    return parents;
+	  }
 
-	    field.render = function(selection) {
-	        var container = selection.selectAll('.form-field')
-	            .data([field]);
-
-	        // Enter
-	        var enter = container.enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'form-field form-field-' + d.safeid; })
-	            .classed('nowrap', !options.wrap);
-
-	        if (options.wrap) {
-	            var labelEnter = enter
-	                .append('label')
-	                .attr('class', 'field-label')
-	                .attr('for', function(d) { return d.domId; });
-
-	            var textEnter = labelEnter
-	                .append('span')
-	                .attr('class', 'label-text');
-
-	            textEnter
-	                .append('span')
-	                .attr('class', 'label-textvalue')
-	                .text(function(d) { return d.label(); });
-
-	            textEnter
-	                .append('span')
-	                .attr('class', 'label-textannotation');
-
-	            if (options.remove) {
-	                labelEnter
-	                    .append('button')
-	                    .attr('class', 'remove-icon')
-	                    .attr('title', _t('icons.remove'))
-	                    .attr('tabindex', -1)
-	                    .call(svgIcon('#iD-operation-delete'));
-	            }
+	  function getMemberships() {
+	    var memberships = [];
+	    var relations = getSharedParentRelations().slice(0, _maxMemberships);
+	    var isMultiselect = _entityIDs.length > 1;
+	    var i, relation, membership, index, member, indexedMember;
 
-	            if (options.revert) {
-	                labelEnter
-	                    .append('button')
-	                    .attr('class', 'modified-icon')
-	                    .attr('title', _t('icons.undo'))
-	                    .attr('tabindex', -1)
-	                    .call(svgIcon((_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-redo' : '#iD-icon-undo'));
-	            }
-	        }
+	    for (i = 0; i < relations.length; i++) {
+	      relation = relations[i];
+	      membership = {
+	        relation: relation,
+	        members: [],
+	        hash: osmEntity.key(relation)
+	      };
 
+	      for (index = 0; index < relation.members.length; index++) {
+	        member = relation.members[index];
 
-	        // Update
-	        container = container
-	            .merge(enter);
+	        if (_entityIDs.indexOf(member.id) !== -1) {
+	          indexedMember = Object.assign({}, member, {
+	            index: index
+	          });
+	          membership.members.push(indexedMember);
+	          membership.hash += ',' + index.toString();
+
+	          if (!isMultiselect) {
+	            // For single selections, list one entry per membership per relation.
+	            // For multiselections, list one entry per relation.
+	            memberships.push(membership);
+	            membership = {
+	              relation: relation,
+	              members: [],
+	              hash: osmEntity.key(relation)
+	            };
+	          }
+	        }
+	      }
 
-	        container.select('.field-label > .remove-icon')  // propagate bound data
-	            .on('click', remove);
+	      if (membership.members.length) memberships.push(membership);
+	    }
 
-	        container.select('.field-label > .modified-icon')  // propagate bound data
-	            .on('click', revert);
+	    memberships.forEach(function (membership) {
+	      membership.domId = utilUniqueDomId('membership-' + membership.relation.id);
+	      var roles = [];
+	      membership.members.forEach(function (member) {
+	        if (roles.indexOf(member.role) === -1) roles.push(member.role);
+	      });
+	      membership.role = roles.length === 1 ? roles[0] : roles;
+	    });
+	    return memberships;
+	  }
 
-	        container
-	            .each(function(d) {
-	                var selection = select(this);
+	  function selectRelation(d3_event, d) {
+	    d3_event.preventDefault(); // remove the hover-highlight styling
 
-	                if (!d.impl) {
-	                    createField();
-	                }
+	    utilHighlightEntities([d.relation.id], false, context);
+	    context.enter(modeSelect(context, [d.relation.id]));
+	  }
 
-	                var reference, help;
+	  function zoomToRelation(d3_event, d) {
+	    d3_event.preventDefault();
+	    var entity = context.entity(d.relation.id);
+	    context.map().zoomToEase(entity); // highlight the relation in case it wasn't previously on-screen
 
-	                // instantiate field help
-	                if (options.wrap && field.type === 'restrictions') {
-	                    help = uiFieldHelp(context, 'restrictions');
-	                }
+	    utilHighlightEntities([d.relation.id], true, context);
+	  }
 
-	                // instantiate tag reference
-	                if (options.wrap && options.info) {
-	                    var referenceKey = d.key;
-	                    if (d.type === 'multiCombo') {   // lookup key without the trailing ':'
-	                        referenceKey = referenceKey.replace(/:$/, '');
-	                    }
+	  function changeRole(d3_event, d) {
+	    if (d === 0) return; // called on newrow (shouldn't happen)
 
-	                    reference = uiTagReference(d.reference || { key: referenceKey });
-	                    if (_state === 'hover') {
-	                        reference.showing(false);
-	                    }
-	                }
+	    if (_inChange) return; // avoid accidental recursive call #5731
 
-	                selection
-	                    .call(d.impl);
+	    var newRole = context.cleanRelationRole(select(this).property('value'));
+	    if (!newRole.trim() && typeof d.role !== 'string') return;
+	    var membersToUpdate = d.members.filter(function (member) {
+	      return member.role !== newRole;
+	    });
 
-	                // add field help components
-	                if (help) {
-	                    selection
-	                        .call(help.body)
-	                        .select('.field-label')
-	                        .call(help.button);
-	                }
+	    if (membersToUpdate.length) {
+	      _inChange = true;
+	      context.perform(function actionChangeMemberRoles(graph) {
+	        membersToUpdate.forEach(function (member) {
+	          var newMember = Object.assign({}, member, {
+	            role: newRole
+	          });
+	          delete newMember.index;
+	          graph = actionChangeMember(d.relation.id, newMember, member.index)(graph);
+	        });
+	        return graph;
+	      }, _t('operations.change_role.annotation', {
+	        n: membersToUpdate.length
+	      }));
+	      context.validator().validate();
+	    }
 
-	                // add tag reference components
-	                if (reference) {
-	                    selection
-	                        .call(reference.body)
-	                        .select('.field-label')
-	                        .call(reference.button);
-	                }
+	    _inChange = false;
+	  }
 
-	                d.impl.tags(_tags);
-	            });
+	  function addMembership(d, role) {
+	    this.blur(); // avoid keeping focus on the button
 
+	    _showBlank = false;
 
-	            container
-	                .classed('locked', _locked)
-	                .classed('modified', isModified())
-	                .classed('present', tagsContainFieldKey());
+	    function actionAddMembers(relationId, ids, role) {
+	      return function (graph) {
+	        for (var i in ids) {
+	          var member = {
+	            id: ids[i],
+	            type: graph.entity(ids[i]).type,
+	            role: role
+	          };
+	          graph = actionAddMember(relationId, member)(graph);
+	        }
 
+	        return graph;
+	      };
+	    }
 
-	            // show a tip and lock icon if the field is locked
-	            var annotation = container.selectAll('.field-label .label-textannotation');
-	            var icon = annotation.selectAll('.icon')
-	                .data(_locked ? [0]: []);
+	    if (d.relation) {
+	      context.perform(actionAddMembers(d.relation.id, _entityIDs, role), _t('operations.add_member.annotation', {
+	        n: _entityIDs.length
+	      }));
+	      context.validator().validate();
+	    } else {
+	      var relation = osmRelation();
+	      context.perform(actionAddEntity(relation), actionAddMembers(relation.id, _entityIDs, role), _t('operations.add.annotation.relation')); // changing the mode also runs `validate`
 
-	            icon.exit()
-	                .remove();
+	      context.enter(modeSelect(context, [relation.id]).newFeature(true));
+	    }
+	  }
 
-	            icon.enter()
-	                .append('svg')
-	                .attr('class', 'icon')
-	                .append('use')
-	                .attr('xlink:href', '#fas-lock');
+	  function deleteMembership(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button
 
-	            container.call(_locked ? _lockedTip : _lockedTip.destroy);
-	    };
+	    if (d === 0) return; // called on newrow (shouldn't happen)
+	    // remove the hover-highlight styling
 
+	    utilHighlightEntities([d.relation.id], false, context);
+	    var indexes = d.members.map(function (member) {
+	      return member.index;
+	    });
+	    context.perform(actionDeleteMembers(d.relation.id, indexes), _t('operations.delete_member.annotation', {
+	      n: _entityIDs.length
+	    }));
+	    context.validator().validate();
+	  }
 
-	    field.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return field;
+	  function fetchNearbyRelations(q, callback) {
+	    var newRelation = {
+	      relation: null,
+	      value: _t('inspector.new_relation'),
+	      display: _t.html('inspector.new_relation')
 	    };
+	    var entityID = _entityIDs[0];
+	    var result = [];
+	    var graph = context.graph();
 
+	    function baseDisplayLabel(entity) {
+	      var matched = _mainPresetIndex.match(entity, graph);
+	      var presetName = matched && matched.name() || _t('inspector.relation');
+	      var entityName = utilDisplayName(entity) || '';
+	      return presetName + ' ' + entityName;
+	    }
 
-	    field.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
-
-	        if (tagsContainFieldKey() && !_show) {
-	            // always show a field if it has a value to display
-	            _show = true;
-	            if (!field.impl) {
-	                createField();
-	            }
-	        }
+	    var explicitRelation = q && context.hasEntity(q.toLowerCase());
 
-	        return field;
-	    };
+	    if (explicitRelation && explicitRelation.type === 'relation' && explicitRelation.id !== entityID) {
+	      // loaded relation is specified explicitly, only show that
+	      result.push({
+	        relation: explicitRelation,
+	        value: baseDisplayLabel(explicitRelation) + ' ' + explicitRelation.id
+	      });
+	    } else {
+	      context.history().intersects(context.map().extent()).forEach(function (entity) {
+	        if (entity.type !== 'relation' || entity.id === entityID) return;
+	        var value = baseDisplayLabel(entity);
+	        if (q && (value + ' ' + entity.id).toLowerCase().indexOf(q.toLowerCase()) === -1) return;
+	        result.push({
+	          relation: entity,
+	          value: value
+	        });
+	      });
+	      result.sort(function (a, b) {
+	        return osmRelation.creationOrder(a.relation, b.relation);
+	      }); // Dedupe identical names by appending relation id - see #2891
 
+	      var dupeGroups = Object.values(utilArrayGroupBy(result, 'value')).filter(function (v) {
+	        return v.length > 1;
+	      });
+	      dupeGroups.forEach(function (group) {
+	        group.forEach(function (obj) {
+	          obj.value += ' ' + obj.relation.id;
+	        });
+	      });
+	    }
 
-	    field.locked = function(val) {
-	        if (!arguments.length) { return _locked; }
-	        _locked = val;
-	        return field;
-	    };
+	    result.forEach(function (obj) {
+	      obj.title = obj.value;
+	    });
+	    result.unshift(newRelation);
+	    callback(result);
+	  }
 
+	  function renderDisclosureContent(selection) {
+	    var memberships = getMemberships();
+	    var list = selection.selectAll('.member-list').data([0]);
+	    list = list.enter().append('ul').attr('class', 'member-list').merge(list);
+	    var items = list.selectAll('li.member-row-normal').data(memberships, function (d) {
+	      return d.hash;
+	    });
+	    items.exit().each(unbind).remove(); // Enter
 
-	    field.show = function() {
-	        _show = true;
-	        if (!field.impl) {
-	            createField();
-	        }
-	        if (field.default && field.key && _tags[field.key] !== field.default) {
-	            var t = {};
-	            t[field.key] = field.default;
-	            dispatch$1.call('change', this, t);
-	        }
-	    };
+	    var itemsEnter = items.enter().append('li').attr('class', 'member-row member-row-normal form-field'); // highlight the relation in the map while hovering on the list item
 
-	    // A shown field has a visible UI, a non-shown field is in the 'Add field' dropdown
-	    field.isShown = function() {
-	        return _show;
-	    };
+	    itemsEnter.on('mouseover', function (d3_event, d) {
+	      utilHighlightEntities([d.relation.id], true, context);
+	    }).on('mouseout', function (d3_event, d) {
+	      utilHighlightEntities([d.relation.id], false, context);
+	    });
+	    var labelEnter = itemsEnter.append('label').attr('class', 'field-label').attr('for', function (d) {
+	      return d.domId;
+	    });
+	    var labelLink = labelEnter.append('span').attr('class', 'label-text').append('a').attr('href', '#').on('click', selectRelation);
+	    labelLink.append('span').attr('class', 'member-entity-type').text(function (d) {
+	      var matched = _mainPresetIndex.match(d.relation, context.graph());
+	      return matched && matched.name() || _t.html('inspector.relation');
+	    });
+	    labelLink.append('span').attr('class', 'member-entity-name').text(function (d) {
+	      return utilDisplayName(d.relation);
+	    });
+	    labelEnter.append('button').attr('class', 'remove member-delete').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete')).on('click', deleteMembership);
+	    labelEnter.append('button').attr('class', 'member-zoom').attr('title', _t('icons.zoom_to')).call(svgIcon('#iD-icon-framed-dot', 'monochrome')).on('click', zoomToRelation);
+	    var wrapEnter = itemsEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
+	    wrapEnter.append('input').attr('class', 'member-role').attr('id', function (d) {
+	      return d.domId;
+	    }).property('type', 'text').property('value', function (d) {
+	      return typeof d.role === 'string' ? d.role : '';
+	    }).attr('title', function (d) {
+	      return Array.isArray(d.role) ? d.role.filter(Boolean).join('\n') : d.role;
+	    }).attr('placeholder', function (d) {
+	      return Array.isArray(d.role) ? _t('inspector.multiple_roles') : _t('inspector.role');
+	    }).classed('mixed', function (d) {
+	      return Array.isArray(d.role);
+	    }).call(utilNoAuto).on('blur', changeRole).on('change', changeRole);
+
+	    if (taginfo) {
+	      wrapEnter.each(bindTypeahead);
+	    }
+
+	    var newMembership = list.selectAll('.member-row-new').data(_showBlank ? [0] : []); // Exit
+
+	    newMembership.exit().remove(); // Enter
+
+	    var newMembershipEnter = newMembership.enter().append('li').attr('class', 'member-row member-row-new form-field');
+	    var newLabelEnter = newMembershipEnter.append('label').attr('class', 'field-label');
+	    newLabelEnter.append('input').attr('placeholder', _t('inspector.choose_relation')).attr('type', 'text').attr('class', 'member-entity-input').call(utilNoAuto);
+	    newLabelEnter.append('button').attr('class', 'remove member-delete').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete')).on('click', function () {
+	      list.selectAll('.member-row-new').remove();
+	    });
+	    var newWrapEnter = newMembershipEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
+	    newWrapEnter.append('input').attr('class', 'member-role').property('type', 'text').attr('placeholder', _t('inspector.role')).call(utilNoAuto); // Update
 
+	    newMembership = newMembership.merge(newMembershipEnter);
+	    newMembership.selectAll('.member-entity-input').on('blur', cancelEntity) // if it wasn't accepted normally, cancel it
+	    .call(nearbyCombo.on('accept', acceptEntity).on('cancel', cancelEntity)); // Container for the Add button
 
-	    // An allowed field can appear in the UI or in the 'Add field' dropdown.
-	    // A non-allowed field is hidden from the user altogether
-	    field.isAllowed = function() {
+	    var addRow = selection.selectAll('.add-row').data([0]); // enter
 
-	        if (entityIDs &&
-	            entityIDs.length > 1 &&
-	            uiFields[field.type].supportsMultiselection === false) { return false; }
+	    var addRowEnter = addRow.enter().append('div').attr('class', 'add-row');
+	    var addRelationButton = addRowEnter.append('button').attr('class', 'add-relation').attr('aria-label', _t('inspector.add_to_relation'));
+	    addRelationButton.call(svgIcon('#iD-icon-plus', 'light'));
+	    addRelationButton.call(uiTooltip().title(_t.html('inspector.add_to_relation')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left'));
+	    addRowEnter.append('div').attr('class', 'space-value'); // preserve space
 
-	        if (field.geometry && !entityIDs.every(function(entityID) {
-	            return field.matchGeometry(context.graph().geometry(entityID));
-	        })) { return false; }
+	    addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+	    // update
 
-	        if (field.countryCodes || field.notCountryCodes) {
-	            var extent = combinedEntityExtent();
-	            if (!extent) { return true; }
+	    addRow = addRow.merge(addRowEnter);
+	    addRow.select('.add-relation').on('click', function () {
+	      _showBlank = true;
+	      section.reRender();
+	      list.selectAll('.member-entity-input').node().focus();
+	    });
 
-	            var center = extent.center();
-	            var countryCode = iso1A2Code(center);
+	    function acceptEntity(d) {
+	      if (!d) {
+	        cancelEntity();
+	        return;
+	      } // remove hover-higlighting
 
-	            if (!countryCode) { return false; }
 
-	            countryCode = countryCode.toLowerCase();
+	      if (d.relation) utilHighlightEntities([d.relation.id], false, context);
+	      var role = context.cleanRelationRole(list.selectAll('.member-row-new .member-role').property('value'));
+	      addMembership(d, role);
+	    }
 
-	            if (field.countryCodes && field.countryCodes.indexOf(countryCode) === -1) {
-	                return false;
-	            }
-	            if (field.notCountryCodes && field.notCountryCodes.indexOf(countryCode) !== -1) {
-	                return false;
-	            }
-	        }
+	    function cancelEntity() {
+	      var input = newMembership.selectAll('.member-entity-input');
+	      input.property('value', ''); // remove hover-higlighting
 
-	        var prerequisiteTag = field.prerequisiteTag;
+	      context.surface().selectAll('.highlighted').classed('highlighted', false);
+	    }
 
-	        if (entityIDs &&
-	            !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
-	            prerequisiteTag) {
+	    function bindTypeahead(d) {
+	      var row = select(this);
+	      var role = row.selectAll('input.member-role');
+	      var origValue = role.property('value');
 
-	            if (!entityIDs.every(function(entityID) {
-	                var entity = context.graph().entity(entityID);
-	                if (prerequisiteTag.key) {
-	                    var value = entity.tags[prerequisiteTag.key];
-	                    if (!value) { return false; }
+	      function sort(value, data) {
+	        var sameletter = [];
+	        var other = [];
 
-	                    if (prerequisiteTag.valueNot) {
-	                        return prerequisiteTag.valueNot !== value;
-	                    }
-	                    if (prerequisiteTag.value) {
-	                        return prerequisiteTag.value === value;
-	                    }
-	                } else if (prerequisiteTag.keyNot) {
-	                    if (entity.tags[prerequisiteTag.keyNot]) { return false; }
-	                }
-	                return true;
-	            })) { return false; }
+	        for (var i = 0; i < data.length; i++) {
+	          if (data[i].value.substring(0, value.length) === value) {
+	            sameletter.push(data[i]);
+	          } else {
+	            other.push(data[i]);
+	          }
 	        }
 
-	        return true;
-	    };
+	        return sameletter.concat(other);
+	      }
+
+	      role.call(uiCombobox(context, 'member-role').fetcher(function (role, callback) {
+	        var rtype = d.relation.tags.type;
+	        taginfo.roles({
+	          debounce: true,
+	          rtype: rtype || '',
+	          geometry: context.graph().geometry(_entityIDs[0]),
+	          query: role
+	        }, function (err, data) {
+	          if (!err) callback(sort(role, data));
+	        });
+	      }).on('cancel', function () {
+	        role.property('value', origValue);
+	      }));
+	    }
 
+	    function unbind() {
+	      var row = select(this);
+	      row.selectAll('input.member-role').call(uiCombobox.off, context);
+	    }
+	  }
 
-	    field.focus = function() {
-	        if (field.impl) {
-	            field.impl.focus();
-	        }
-	    };
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _showBlank = false;
+	    return section;
+	  };
 
+	  return section;
+	}
 
-	    function combinedEntityExtent() {
-	        return entityIDs && entityIDs.length && entityIDs.reduce(function(extent, entityID) {
-	            var entity = context.graph().entity(entityID);
-	            return extent.extend(entity.extent(context.graph()));
-	        }, geoExtent());
+	function uiSectionSelectionList(context) {
+	  var _selectedIDs = [];
+	  var section = uiSection('selected-features', context).shouldDisplay(function () {
+	    return _selectedIDs.length > 1;
+	  }).label(function () {
+	    return _t.html('inspector.title_count', {
+	      title: {
+	        html: _t.html('inspector.features')
+	      },
+	      count: _selectedIDs.length
+	    });
+	  }).disclosureContent(renderDisclosureContent);
+	  context.history().on('change.selectionList', function (difference) {
+	    if (difference) {
+	      section.reRender();
 	    }
+	  });
 
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _selectedIDs;
+	    _selectedIDs = val;
+	    return section;
+	  };
 
-	    return utilRebind(field, dispatch$1, 'on');
-	}
+	  function selectEntity(d3_event, entity) {
+	    context.enter(modeSelect(context, [entity.id]));
+	  }
 
-	function uiFormFields(context) {
-	    var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
-	    var _fieldsArr = [];
-	    var _lastPlaceholder = '';
-	    var _state = '';
-	    var _klass = '';
+	  function deselectEntity(d3_event, entity) {
+	    var selectedIDs = _selectedIDs.slice();
 
+	    var index = selectedIDs.indexOf(entity.id);
 
-	    function formFields(selection) {
-	        var allowedFields = _fieldsArr.filter(function(field) { return field.isAllowed(); });
-	        var shown = allowedFields.filter(function(field) { return field.isShown(); });
-	        var notShown = allowedFields.filter(function(field) { return !field.isShown(); });
+	    if (index > -1) {
+	      selectedIDs.splice(index, 1);
+	      context.enter(modeSelect(context, selectedIDs));
+	    }
+	  }
 
-	        var container = selection.selectAll('.form-fields-container')
-	            .data([0]);
+	  function renderDisclosureContent(selection) {
+	    var list = selection.selectAll('.feature-list').data([0]);
+	    list = list.enter().append('ul').attr('class', 'feature-list').merge(list);
 
-	        container = container.enter()
-	            .append('div')
-	            .attr('class', 'form-fields-container ' + (_klass || ''))
-	            .merge(container);
+	    var entities = _selectedIDs.map(function (id) {
+	      return context.hasEntity(id);
+	    }).filter(Boolean);
 
+	    var items = list.selectAll('.feature-list-item').data(entities, osmEntity.key);
+	    items.exit().remove(); // Enter
 
-	        var fields = container.selectAll('.wrap-form-field')
-	            .data(shown, function(d) { return d.id + (d.entityIDs ? d.entityIDs.join() : ''); });
+	    var enter = items.enter().append('li').attr('class', 'feature-list-item').each(function (d) {
+	      select(this).on('mouseover', function () {
+	        utilHighlightEntities([d.id], true, context);
+	      }).on('mouseout', function () {
+	        utilHighlightEntities([d.id], false, context);
+	      });
+	    });
+	    var label = enter.append('button').attr('class', 'label').on('click', selectEntity);
+	    label.append('span').attr('class', 'entity-geom-icon').call(svgIcon('', 'pre-text'));
+	    label.append('span').attr('class', 'entity-type');
+	    label.append('span').attr('class', 'entity-name');
+	    enter.append('button').attr('class', 'close').attr('title', _t('icons.deselect')).on('click', deselectEntity).call(svgIcon('#iD-icon-close')); // Update
+
+	    items = items.merge(enter);
+	    items.selectAll('.entity-geom-icon use').attr('href', function () {
+	      var entity = this.parentNode.parentNode.__data__;
+	      return '#iD-icon-' + entity.geometry(context.graph());
+	    });
+	    items.selectAll('.entity-type').text(function (entity) {
+	      return _mainPresetIndex.match(entity, context.graph()).name();
+	    });
+	    items.selectAll('.entity-name').text(function (d) {
+	      // fetch latest entity
+	      var entity = context.entity(d.id);
+	      return utilDisplayName(entity);
+	    });
+	  }
 
-	        fields.exit()
-	            .remove();
+	  return section;
+	}
 
-	        // Enter
-	        var enter = fields.enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'wrap-form-field wrap-form-field-' + d.safeid; });
+	function uiEntityEditor(context) {
+	  var dispatch = dispatch$8('choose');
+	  var _state = 'select';
+	  var _coalesceChanges = false;
+	  var _modified = false;
 
-	        // Update
-	        fields = fields
-	            .merge(enter);
+	  var _base;
 
-	        fields
-	            .order()
-	            .each(function(d) {
-	                select(this)
-	                    .call(d.render);
-	            });
+	  var _entityIDs;
 
+	  var _activePresets = [];
 
-	        var titles = [];
-	        var moreFields = notShown.map(function(field) {
-	            var label = field.label();
-	            titles.push(label);
+	  var _newFeature;
 
-	            var terms = field.terms();
-	            if (field.key) { terms.push(field.key); }
-	            if (field.keys) { terms = terms.concat(field.keys); }
+	  var _sections;
 
-	            return {
-	                title: label,
-	                value: label,
-	                field: field,
-	                terms: terms
-	            };
-	        });
+	  function entityEditor(selection) {
+	    var combinedTags = utilCombinedTags(_entityIDs, context.graph()); // Header
 
-	        var placeholder = titles.slice(0,3).join(', ') + ((titles.length > 3) ? '…' : '');
+	    var header = selection.selectAll('.header').data([0]); // Enter
 
+	    var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+	    var direction = _mainLocalizer.textDirection() === 'rtl' ? 'forward' : 'backward';
+	    headerEnter.append('button').attr('class', 'preset-reset preset-choose').attr('title', _t("icons.".concat(direction))).call(svgIcon("#iD-icon-".concat(direction)));
+	    headerEnter.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+	      context.enter(modeBrowse(context));
+	    }).call(svgIcon(_modified ? '#iD-icon-apply' : '#iD-icon-close'));
+	    headerEnter.append('h2'); // Update
 
-	        var more = selection.selectAll('.more-fields')
-	            .data((_state === 'hover' || moreFields.length === 0) ? [] : [0]);
+	    header = header.merge(headerEnter);
+	    header.selectAll('h2').html(_entityIDs.length === 1 ? _t.html('inspector.edit') : _t.html('inspector.edit_features'));
+	    header.selectAll('.preset-reset').on('click', function () {
+	      dispatch.call('choose', this, _activePresets);
+	    }); // Body
 
-	        more.exit()
-	            .remove();
+	    var body = selection.selectAll('.inspector-body').data([0]); // Enter
 
-	        var moreEnter = more.enter()
-	            .append('div')
-	            .attr('class', 'more-fields')
-	            .append('label');
-
-	        moreEnter
-	            .append('span')
-	            .text(_t('inspector.add_fields'));
-
-	        more = moreEnter
-	            .merge(more);
-
-
-	        var input = more.selectAll('.value')
-	            .data([0]);
-
-	        input.exit()
-	            .remove();
-
-	        input = input.enter()
-	            .append('input')
-	            .attr('class', 'value')
-	            .attr('type', 'text')
-	            .attr('placeholder', placeholder)
-	            .call(utilNoAuto)
-	            .merge(input);
-
-	        input
-	            .call(utilGetSetValue, '')
-	            .call(moreCombo
-	                .data(moreFields)
-	                .on('accept', function (d) {
-	                    if (!d) { return; }  // user entered something that was not matched
-	                    var field = d.field;
-	                    field.show();
-	                    selection.call(formFields);  // rerender
-	                    if (field.type !== 'semiCombo' && field.type !== 'multiCombo') {
-	                        field.focus();
-	                    }
-	                })
-	            );
+	    var bodyEnter = body.enter().append('div').attr('class', 'entity-editor inspector-body sep-top'); // Update
 
-	        // avoid updating placeholder excessively (triggers style recalc)
-	        if (_lastPlaceholder !== placeholder) {
-	            input.attr('placeholder', placeholder);
-	            _lastPlaceholder = placeholder;
-	        }
+	    body = body.merge(bodyEnter);
+
+	    if (!_sections) {
+	      _sections = [uiSectionSelectionList(context), uiSectionFeatureType(context).on('choose', function (presets) {
+	        dispatch.call('choose', this, presets);
+	      }), uiSectionEntityIssues(context), uiSectionPresetFields(context).on('change', changeTags).on('revert', revertTags), uiSectionRawTagEditor('raw-tag-editor', context).on('change', changeTags), uiSectionRawMemberEditor(context), uiSectionRawMembershipEditor(context)];
 	    }
 
+	    _sections.forEach(function (section) {
+	      if (section.entityIDs) {
+	        section.entityIDs(_entityIDs);
+	      }
 
-	    formFields.fieldsArr = function(val) {
-	        if (!arguments.length) { return _fieldsArr; }
-	        _fieldsArr = val || [];
-	        return formFields;
-	    };
+	      if (section.presets) {
+	        section.presets(_activePresets);
+	      }
 
-	    formFields.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return formFields;
-	    };
+	      if (section.tags) {
+	        section.tags(combinedTags);
+	      }
 
-	    formFields.klass = function(val) {
-	        if (!arguments.length) { return _klass; }
-	        _klass = val;
-	        return formFields;
-	    };
+	      if (section.state) {
+	        section.state(_state);
+	      }
 
+	      body.call(section.render);
+	    });
 
-	    return formFields;
-	}
+	    context.history().on('change.entity-editor', historyChanged);
+
+	    function historyChanged(difference) {
+	      if (selection.selectAll('.entity-editor').empty()) return;
+	      if (_state === 'hide') return;
+	      var significant = !difference || difference.didChange.properties || difference.didChange.addition || difference.didChange.deletion;
+	      if (!significant) return;
+	      _entityIDs = _entityIDs.filter(context.hasEntity);
+	      if (!_entityIDs.length) return;
+	      var priorActivePreset = _activePresets.length === 1 && _activePresets[0];
+	      loadActivePresets();
+	      var graph = context.graph();
+	      entityEditor.modified(_base !== graph);
+	      entityEditor(selection);
+
+	      if (priorActivePreset && _activePresets.length === 1 && priorActivePreset !== _activePresets[0]) {
+	        // flash the button to indicate the preset changed
+	        context.container().selectAll('.entity-editor button.preset-reset .label').style('background-color', '#fff').transition().duration(750).style('background-color', null);
+	      }
+	    }
+	  } // Tag changes that fire on input can all get coalesced into a single
+	  // history operation when the user leaves the field.  #2342
+	  // Use explicit entityIDs in case the selection changes before the event is fired.
 
-	function uiSectionPresetFields(context) {
 
-	    var section = uiSection('preset-fields', context)
-	        .title(function() {
-	            return _t('inspector.fields');
-	        })
-	        .disclosureContent(renderDisclosureContent);
+	  function changeTags(entityIDs, changed, onInput) {
+	    var actions = [];
 
-	    var dispatch$1 = dispatch('change', 'revert');
-	    var formFields = uiFormFields(context);
-	    var _state;
-	    var _fieldsArr;
-	    var _presets = [];
-	    var _tags;
-	    var _entityIDs;
+	    for (var i in entityIDs) {
+	      var entityID = entityIDs[i];
+	      var entity = context.entity(entityID);
+	      var tags = Object.assign({}, entity.tags); // shallow copy
 
-	    function renderDisclosureContent(selection) {
-	        if (!_fieldsArr) {
+	      for (var k in changed) {
+	        if (!k) continue;
+	        var v = changed[k];
 
-	            var graph = context.graph();
+	        if (_typeof(v) === 'object') {
+	          // a "key only" tag change
+	          tags[k] = tags[v.oldKey];
+	        } else if (v !== undefined || tags.hasOwnProperty(k)) {
+	          tags[k] = v;
+	        }
+	      }
 
-	            var geometries = Object.keys(_entityIDs.reduce(function(geoms, entityID) {
-	                return geoms[graph.entity(entityID).geometry(graph)] = true;
-	            }, {}));
+	      if (!onInput) {
+	        tags = utilCleanTags(tags);
+	      }
 
-	            var presetsManager = _mainPresetIndex;
+	      if (!fastDeepEqual(entity.tags, tags)) {
+	        actions.push(actionChangeTags(entityID, tags));
+	      }
+	    }
 
-	            var allFields = [];
-	            var allMoreFields = [];
-	            var sharedTotalFields;
+	    if (actions.length) {
+	      var combinedAction = function combinedAction(graph) {
+	        actions.forEach(function (action) {
+	          graph = action(graph);
+	        });
+	        return graph;
+	      };
 
-	            _presets.forEach(function(preset) {
-	                var fields = preset.fields();
-	                var moreFields = preset.moreFields();
+	      var annotation = _t('operations.change_tags.annotation');
 
-	                allFields = utilArrayUnion(allFields, fields);
-	                allMoreFields = utilArrayUnion(allMoreFields, moreFields);
+	      if (_coalesceChanges) {
+	        context.overwrite(combinedAction, annotation);
+	      } else {
+	        context.perform(combinedAction, annotation);
+	        _coalesceChanges = !!onInput;
+	      }
+	    } // if leaving field (blur event), rerun validation
 
-	                if (!sharedTotalFields) {
-	                    sharedTotalFields = utilArrayUnion(fields, moreFields);
-	                } else {
-	                    sharedTotalFields = sharedTotalFields.filter(function(field) {
-	                        return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
-	                    });
-	                }
-	            });
 
-	            var sharedFields = allFields.filter(function(field) {
-	                return sharedTotalFields.indexOf(field) !== -1;
-	            });
-	            var sharedMoreFields = allMoreFields.filter(function(field) {
-	                return sharedTotalFields.indexOf(field) !== -1;
-	            });
+	    if (!onInput) {
+	      context.validator().validate();
+	    }
+	  }
 
-	            _fieldsArr = [];
+	  function revertTags(keys) {
+	    var actions = [];
 
-	            sharedFields.forEach(function(field) {
-	                if (field.matchAllGeometry(geometries)) {
-	                    _fieldsArr.push(
-	                        uiField(context, field, _entityIDs)
-	                    );
-	                }
-	            });
+	    for (var i in _entityIDs) {
+	      var entityID = _entityIDs[i];
+	      var original = context.graph().base().entities[entityID];
+	      var changed = {};
 
-	            var singularEntity = _entityIDs.length === 1 && graph.hasEntity(_entityIDs[0]);
-	            if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
-	                _fieldsArr.push(
-	                    uiField(context, presetsManager.field('restrictions'), _entityIDs)
-	                );
-	            }
+	      for (var j in keys) {
+	        var key = keys[j];
+	        changed[key] = original ? original.tags[key] : undefined;
+	      }
 
-	            var additionalFields = utilArrayUnion(sharedMoreFields, presetsManager.universal());
-	            additionalFields.sort(function(field1, field2) {
-	                return field1.label().localeCompare(field2.label(), _mainLocalizer.localeCode());
-	            });
+	      var entity = context.entity(entityID);
+	      var tags = Object.assign({}, entity.tags); // shallow copy
 
-	            additionalFields.forEach(function(field) {
-	                if (sharedFields.indexOf(field) === -1 &&
-	                    field.matchAllGeometry(geometries)) {
-	                    _fieldsArr.push(
-	                        uiField(context, field, _entityIDs, { show: false })
-	                    );
-	                }
-	            });
+	      for (var k in changed) {
+	        if (!k) continue;
+	        var v = changed[k];
 
-	            _fieldsArr.forEach(function(field) {
-	                field
-	                    .on('change', function(t, onInput) {
-	                        dispatch$1.call('change', field, _entityIDs, t, onInput);
-	                    })
-	                    .on('revert', function(keys) {
-	                        dispatch$1.call('revert', field, keys);
-	                    });
-	            });
+	        if (v !== undefined || tags.hasOwnProperty(k)) {
+	          tags[k] = v;
 	        }
+	      }
 
-	        _fieldsArr.forEach(function(field) {
-	            field
-	                .state(_state)
-	                .tags(_tags);
-	        });
+	      tags = utilCleanTags(tags);
 
+	      if (!fastDeepEqual(entity.tags, tags)) {
+	        actions.push(actionChangeTags(entityID, tags));
+	      }
+	    }
 
-	        selection
-	            .call(formFields
-	                .fieldsArr(_fieldsArr)
-	                .state(_state)
-	                .klass('grouped-items-area')
-	            );
+	    if (actions.length) {
+	      var combinedAction = function combinedAction(graph) {
+	        actions.forEach(function (action) {
+	          graph = action(graph);
+	        });
+	        return graph;
+	      };
 
+	      var annotation = _t('operations.change_tags.annotation');
 
-	        selection.selectAll('.wrap-form-field input')
-	            .on('keydown', function() {
-	                // if user presses enter, and combobox is not active, accept edits..
-	                if (event.keyCode === 13 && context.container().select('.combobox').empty()) {
-	                    context.enter(modeBrowse(context));
-	                }
-	            });
+	      if (_coalesceChanges) {
+	        context.overwrite(combinedAction, annotation);
+	      } else {
+	        context.perform(combinedAction, annotation);
+	        _coalesceChanges = false;
+	      }
 	    }
 
-	    section.presets = function(val) {
-	        if (!arguments.length) { return _presets; }
-	        if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
-	            _presets = val;
-	            _fieldsArr = null;
-	        }
-	        return section;
-	    };
+	    context.validator().validate();
+	  }
 
-	    section.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return section;
-	    };
+	  entityEditor.modified = function (val) {
+	    if (!arguments.length) return _modified;
+	    _modified = val;
+	    return entityEditor;
+	  };
 
-	    section.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
-	        // Don't reset _fieldsArr here.
-	        return section;
-	    };
+	  entityEditor.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return entityEditor;
+	  };
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
-	            _entityIDs = val;
-	            _fieldsArr = null;
-	        }
-	        return section;
-	    };
+	  entityEditor.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs; // always reload these even if the entityIDs are unchanged, since we
+	    // could be reselecting after something like dragging a node
 
-	    return utilRebind(section, dispatch$1, 'on');
-	}
+	    _base = context.graph();
+	    _coalesceChanges = false;
+	    if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) return entityEditor; // exit early if no change
 
-	function uiSectionRawMemberEditor(context) {
+	    _entityIDs = val;
+	    loadActivePresets(true);
+	    return entityEditor.modified(false);
+	  };
 
-	    var section = uiSection('raw-member-editor', context)
-	        .shouldDisplay(function() {
-	            if (!_entityIDs || _entityIDs.length !== 1) { return false; }
+	  entityEditor.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return entityEditor;
+	  };
 
-	            var entity = context.hasEntity(_entityIDs[0]);
-	            return entity && entity.type === 'relation';
-	        })
-	        .title(function() {
-	            var entity = context.hasEntity(_entityIDs[0]);
-	            if (!entity) { return ''; }
+	  function loadActivePresets(isForNewSelection) {
+	    var graph = context.graph();
+	    var counts = {};
 
-	            var gt = entity.members.length > _maxMembers ? '>' : '';
-	            var count = gt + entity.members.slice(0, _maxMembers).length;
-	            return _t('inspector.title_count', { title: _t('inspector.members'), count: count });
-	        })
-	        .disclosureContent(renderDisclosureContent);
+	    for (var i in _entityIDs) {
+	      var entity = graph.hasEntity(_entityIDs[i]);
+	      if (!entity) return;
+	      var match = _mainPresetIndex.match(entity, graph);
+	      if (!counts[match.id]) counts[match.id] = 0;
+	      counts[match.id] += 1;
+	    }
 
-	    var taginfo = services.taginfo;
-	    var _entityIDs;
-	    var _maxMembers = 1000;
+	    var matches = Object.keys(counts).sort(function (p1, p2) {
+	      return counts[p2] - counts[p1];
+	    }).map(function (pID) {
+	      return _mainPresetIndex.item(pID);
+	    });
 
-	    function downloadMember(d) {
-	        event.preventDefault();
+	    if (!isForNewSelection) {
+	      // A "weak" preset doesn't set any tags. (e.g. "Address")
+	      var weakPreset = _activePresets.length === 1 && !_activePresets[0].isFallback() && Object.keys(_activePresets[0].addTags || {}).length === 0; // Don't replace a weak preset with a fallback preset (e.g. "Point")
 
-	        // display the loading indicator
-	        select(this.parentNode).classed('tag-reference-loading', true);
-	        context.loadEntity(d.id, function() {
-	            section.reRender();
-	        });
+	      if (weakPreset && matches.length === 1 && matches[0].isFallback()) return;
 	    }
 
-	    function zoomToMember(d) {
-	        event.preventDefault();
+	    entityEditor.presets(matches);
+	  }
 
-	        var entity = context.entity(d.id);
-	        context.map().zoomToEase(entity);
+	  entityEditor.presets = function (val) {
+	    if (!arguments.length) return _activePresets; // don't reload the same preset
 
-	        // highlight the feature in case it wasn't previously on-screen
-	        utilHighlightEntities([d.id], true, context);
+	    if (!utilArrayIdentical(val, _activePresets)) {
+	      _activePresets = val;
 	    }
 
+	    return entityEditor;
+	  };
 
-	    function selectMember(d) {
-	        event.preventDefault();
-
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.id], false, context);
+	  return utilRebind(entityEditor, dispatch, 'on');
+	}
 
-	        var entity = context.entity(d.id);
-	        var mapExtent = context.map().extent();
-	        if (!entity.intersects(mapExtent, context.graph())) {
-	            // zoom to the entity if its extent is not visible now
-	            context.map().zoomToEase(entity);
-	        }
+	var sexagesimal = {exports: {}};
 
-	        context.enter(modeSelect(context, [d.id]));
-	    }
+	sexagesimal.exports = element;
+	var pair_1 = sexagesimal.exports.pair = pair;
+	sexagesimal.exports.format = format;
+	sexagesimal.exports.formatPair = formatPair;
+	sexagesimal.exports.coordToDMS = coordToDMS;
 
+	function element(input, dims) {
+	  var result = search(input, dims);
+	  return result === null ? null : result.val;
+	}
 
-	    function changeRole(d) {
-	        var oldRole = d.role;
-	        var newRole = context.cleanRelationRole(select(this).property('value'));
+	function formatPair(input) {
+	  return format(input.lat, 'lat') + ' ' + format(input.lon, 'lon');
+	} // Is 0 North or South?
 
-	        if (oldRole !== newRole) {
-	            var member = { id: d.id, type: d.type, role: newRole };
-	            context.perform(
-	                actionChangeMember(d.relation.id, member, d.index),
-	                _t('operations.change_role.annotation')
-	            );
-	        }
-	    }
 
+	function format(input, dim) {
+	  var dms = coordToDMS(input, dim);
+	  return dms.whole + '° ' + (dms.minutes ? dms.minutes + '\' ' : '') + (dms.seconds ? dms.seconds + '" ' : '') + dms.dir;
+	}
 
-	    function deleteMember(d) {
+	function coordToDMS(input, dim) {
+	  var dirs = {
+	    lat: ['N', 'S'],
+	    lon: ['E', 'W']
+	  }[dim] || '';
+	  var dir = dirs[input >= 0 ? 0 : 1];
+	  var abs = Math.abs(input);
+	  var whole = Math.floor(abs);
+	  var fraction = abs - whole;
+	  var fractionMinutes = fraction * 60;
+	  var minutes = Math.floor(fractionMinutes);
+	  var seconds = Math.floor((fractionMinutes - minutes) * 60);
+	  return {
+	    whole: whole,
+	    minutes: minutes,
+	    seconds: seconds,
+	    dir: dir
+	  };
+	}
 
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.id], false, context);
+	function search(input, dims) {
+	  if (!dims) dims = 'NSEW';
+	  if (typeof input !== 'string') return null;
+	  input = input.toUpperCase();
+	  var regex = /^[\s\,]*([NSEW])?\s*([\-|\—|\―]?[0-9.]+)[°º˚]?\s*(?:([0-9.]+)['’′‘]\s*)?(?:([0-9.]+)(?:''|"|”|″)\s*)?([NSEW])?/;
+	  var m = input.match(regex);
+	  if (!m) return null; // no match
 
-	        context.perform(
-	            actionDeleteMember(d.relation.id, d.index),
-	            _t('operations.delete_member.annotation')
-	        );
+	  var matched = m[0]; // extract dimension.. m[1] = leading, m[5] = trailing
 
-	        if (!context.hasEntity(d.relation.id)) {
-	            context.enter(modeBrowse(context));
-	        }
-	    }
+	  var dim;
 
-	    function renderDisclosureContent(selection) {
+	  if (m[1] && m[5]) {
+	    // if matched both..
+	    dim = m[1]; // keep leading
 
-	        var entityID = _entityIDs[0];
+	    matched = matched.slice(0, -1); // remove trailing dimension from match
+	  } else {
+	    dim = m[1] || m[5];
+	  } // if unrecognized dimension
 
-	        var memberships = [];
-	        var entity = context.entity(entityID);
-	        entity.members.slice(0, _maxMembers).forEach(function(member, index) {
-	            memberships.push({
-	                index: index,
-	                id: member.id,
-	                type: member.type,
-	                role: member.role,
-	                relation: entity,
-	                member: context.hasEntity(member.id),
-	                domId: utilUniqueDomId(entityID + '-member-' + index)
-	            });
-	        });
 
-	        var list = selection.selectAll('.member-list')
-	            .data([0]);
+	  if (dim && dims.indexOf(dim) === -1) return null; // extract DMS
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'member-list')
-	            .merge(list);
+	  var deg = m[2] ? parseFloat(m[2]) : 0;
+	  var min = m[3] ? parseFloat(m[3]) / 60 : 0;
+	  var sec = m[4] ? parseFloat(m[4]) / 3600 : 0;
+	  var sign = deg < 0 ? -1 : 1;
+	  if (dim === 'S' || dim === 'W') sign *= -1;
+	  return {
+	    val: (Math.abs(deg) + min + sec) * sign,
+	    dim: dim,
+	    matched: matched,
+	    remain: input.slice(matched.length)
+	  };
+	}
 
+	function pair(input, dims) {
+	  input = input.trim();
+	  var one = search(input, dims);
+	  if (!one) return null;
+	  input = one.remain.trim();
+	  var two = search(input, dims);
+	  if (!two || two.remain) return null;
 
-	        var items = list.selectAll('li')
-	            .data(memberships, function(d) {
-	                return osmEntity.key(d.relation) + ',' + d.index + ',' +
-	                    (d.member ? osmEntity.key(d.member) : 'incomplete');
-	            });
+	  if (one.dim) {
+	    return swapdim(one.val, two.val, one.dim);
+	  } else {
+	    return [one.val, two.val];
+	  }
+	}
 
-	        items.exit()
-	            .each(unbind)
-	            .remove();
-
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', 'member-row form-field')
-	            .classed('member-incomplete', function(d) { return !d.member; });
-
-	        itemsEnter
-	            .each(function(d) {
-	                var item = select(this);
-
-	                var label = item
-	                    .append('label')
-	                    .attr('class', 'field-label')
-	                    .attr('for', d.domId);
-
-	                if (d.member) {
-	                    // highlight the member feature in the map while hovering on the list item
-	                    item
-	                        .on('mouseover', function() {
-	                            utilHighlightEntities([d.id], true, context);
-	                        })
-	                        .on('mouseout', function() {
-	                            utilHighlightEntities([d.id], false, context);
-	                        });
-
-	                    var labelLink = label
-	                        .append('span')
-	                        .attr('class', 'label-text')
-	                        .append('a')
-	                        .attr('href', '#')
-	                        .on('click', selectMember);
-
-	                    labelLink
-	                        .append('span')
-	                        .attr('class', 'member-entity-type')
-	                        .text(function(d) {
-	                            var matched = _mainPresetIndex.match(d.member, context.graph());
-	                            return (matched && matched.name()) || utilDisplayType(d.member.id);
-	                        });
-
-	                    labelLink
-	                        .append('span')
-	                        .attr('class', 'member-entity-name')
-	                        .text(function(d) { return utilDisplayName(d.member); });
-
-	                    label
-	                        .append('button')
-	                        .attr('tabindex', -1)
-	                        .attr('title', _t('icons.remove'))
-	                        .attr('class', 'remove member-delete')
-	                        .call(svgIcon('#iD-operation-delete'));
-
-	                    label
-	                        .append('button')
-	                        .attr('class', 'member-zoom')
-	                        .attr('title', _t('icons.zoom_to'))
-	                        .call(svgIcon('#iD-icon-framed-dot', 'monochrome'))
-	                        .on('click', zoomToMember);
+	function swapdim(a, b, dim) {
+	  if (dim === 'N' || dim === 'S') return [a, b];
+	  if (dim === 'W' || dim === 'E') return [b, a];
+	}
 
-	                } else {
-	                    var labelText = label
-	                        .append('span')
-	                        .attr('class', 'label-text');
-
-	                    labelText
-	                        .append('span')
-	                        .attr('class', 'member-entity-type')
-	                        .text(_t('inspector.' + d.type, { id: d.id }));
-
-	                    labelText
-	                        .append('span')
-	                        .attr('class', 'member-entity-name')
-	                        .text(_t('inspector.incomplete', { id: d.id }));
-
-	                    label
-	                        .append('button')
-	                        .attr('class', 'member-download')
-	                        .attr('title', _t('icons.download'))
-	                        .attr('tabindex', -1)
-	                        .call(svgIcon('#iD-icon-load'))
-	                        .on('click', downloadMember);
-	                }
-	            });
+	function uiFeatureList(context) {
+	  var _geocodeResults;
+
+	  function featureList(selection) {
+	    var header = selection.append('div').attr('class', 'header fillL');
+	    header.append('h2').call(_t.append('inspector.feature_list'));
+	    var searchWrap = selection.append('div').attr('class', 'search-header');
+	    searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
+	    var search = searchWrap.append('input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keypress', keypress).on('keydown', keydown).on('input', inputevent);
+	    var listWrap = selection.append('div').attr('class', 'inspector-body');
+	    var list = listWrap.append('div').attr('class', 'feature-list');
+	    context.on('exit.feature-list', clearSearch);
+	    context.map().on('drawn.feature-list', mapDrawn);
+	    context.keybinding().on(uiCmd('⌘F'), focusSearch);
+
+	    function focusSearch(d3_event) {
+	      var mode = context.mode() && context.mode().id;
+	      if (mode !== 'browse') return;
+	      d3_event.preventDefault();
+	      search.node().focus();
+	    }
+
+	    function keydown(d3_event) {
+	      if (d3_event.keyCode === 27) {
+	        // escape
+	        search.node().blur();
+	      }
+	    }
 
-	        var wrapEnter = itemsEnter
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-member');
-
-	        wrapEnter
-	            .append('input')
-	            .attr('class', 'member-role')
-	            .attr('id', function(d) {
-	                return d.domId;
-	            })
-	            .property('type', 'text')
-	            .attr('placeholder', _t('inspector.role'))
-	            .call(utilNoAuto);
-
-	        if (taginfo) {
-	            wrapEnter.each(bindTypeahead);
-	        }
-
-	        // update
-	        items = items
-	            .merge(itemsEnter)
-	            .order();
-
-	        items.select('input.member-role')
-	            .property('value', function(d) { return d.role; })
-	            .on('blur', changeRole)
-	            .on('change', changeRole);
-
-	        items.select('button.member-delete')
-	            .on('click', deleteMember);
-
-	        var dragOrigin, targetIndex;
-
-	        items.call(d3_drag()
-	            .on('start', function() {
-	                dragOrigin = {
-	                    x: event.x,
-	                    y: event.y
-	                };
-	                targetIndex = null;
-	            })
-	            .on('drag', function(d, index) {
-	                var x = event.x - dragOrigin.x,
-	                    y = event.y - dragOrigin.y;
-
-	                if (!select(this).classed('dragging') &&
-	                    // don't display drag until dragging beyond a distance threshold
-	                    Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) { return; }
-
-	                select(this)
-	                    .classed('dragging', true);
-
-	                targetIndex = null;
-
-	                selection.selectAll('li.member-row')
-	                    .style('transform', function(d2, index2) {
-	                        var node = select(this).node();
-	                        if (index === index2) {
-	                            return 'translate(' + x + 'px, ' + y + 'px)';
-	                        } else if (index2 > index && event.y > node.offsetTop) {
-	                            if (targetIndex === null || index2 > targetIndex) {
-	                                targetIndex = index2;
-	                            }
-	                            return 'translateY(-100%)';
-	                        } else if (index2 < index && event.y < node.offsetTop + node.offsetHeight) {
-	                            if (targetIndex === null || index2 < targetIndex) {
-	                                targetIndex = index2;
-	                            }
-	                            return 'translateY(100%)';
-	                        }
-	                        return null;
-	                    });
-	            })
-	            .on('end', function(d, index) {
+	    function keypress(d3_event) {
+	      var q = search.property('value'),
+	          items = list.selectAll('.feature-list-item');
 
-	                if (!select(this).classed('dragging')) {
-	                    return;
-	                }
+	      if (d3_event.keyCode === 13 && // ↩ Return
+	      q.length && items.size()) {
+	        click(d3_event, items.datum());
+	      }
+	    }
 
-	                select(this)
-	                    .classed('dragging', false);
+	    function inputevent() {
+	      _geocodeResults = undefined;
+	      drawList();
+	    }
 
-	                selection.selectAll('li.member-row')
-	                    .style('transform', null);
+	    function clearSearch() {
+	      search.property('value', '');
+	      drawList();
+	    }
 
-	                if (targetIndex !== null) {
-	                    // dragged to a new position, reorder
-	                    context.perform(
-	                        actionMoveMember(d.relation.id, index, targetIndex),
-	                        _t('operations.reorder_members.annotation')
-	                    );
-	                }
-	            })
-	        );
+	    function mapDrawn(e) {
+	      if (e.full) {
+	        drawList();
+	      }
+	    }
 
+	    function features() {
+	      var result = [];
+	      var graph = context.graph();
+	      var visibleCenter = context.map().extent().center();
+	      var q = search.property('value').toLowerCase();
+	      if (!q) return result;
+	      var locationMatch = pair_1(q.toUpperCase()) || q.match(/^(-?\d+\.?\d*)\s+(-?\d+\.?\d*)$/);
+
+	      if (locationMatch) {
+	        var loc = [parseFloat(locationMatch[0]), parseFloat(locationMatch[1])];
+	        result.push({
+	          id: -1,
+	          geometry: 'point',
+	          type: _t('inspector.location'),
+	          name: dmsCoordinatePair([loc[1], loc[0]]),
+	          location: loc
+	        });
+	      } // A location search takes priority over an ID search
 
 
-	        function bindTypeahead(d) {
-	            var row = select(this);
-	            var role = row.selectAll('input.member-role');
-	            var origValue = role.property('value');
+	      var idMatch = !locationMatch && q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
 
-	            function sort(value, data) {
-	                var sameletter = [];
-	                var other = [];
-	                for (var i = 0; i < data.length; i++) {
-	                    if (data[i].value.substring(0, value.length) === value) {
-	                        sameletter.push(data[i]);
-	                    } else {
-	                        other.push(data[i]);
-	                    }
-	                }
-	                return sameletter.concat(other);
-	            }
+	      if (idMatch) {
+	        var elemType = idMatch[1].charAt(0);
+	        var elemId = idMatch[2];
+	        result.push({
+	          id: elemType + elemId,
+	          geometry: elemType === 'n' ? 'point' : elemType === 'w' ? 'line' : 'relation',
+	          type: elemType === 'n' ? _t('inspector.node') : elemType === 'w' ? _t('inspector.way') : _t('inspector.relation'),
+	          name: elemId
+	        });
+	      }
 
-	            role.call(uiCombobox(context, 'member-role')
-	                .fetcher(function(role, callback) {
-	                    // The `geometry` param is used in the `taginfo.js` interface for
-	                    // filtering results, as a key into the `tag_members_fractions`
-	                    // object.  If we don't know the geometry because the member is
-	                    // not yet downloaded, it's ok to guess based on type.
-	                    var geometry;
-	                    if (d.member) {
-	                        geometry = context.graph().geometry(d.member.id);
-	                    } else if (d.type === 'relation') {
-	                        geometry = 'relation';
-	                    } else if (d.type === 'way') {
-	                        geometry = 'line';
-	                    } else {
-	                        geometry = 'point';
-	                    }
+	      var allEntities = graph.entities;
+	      var localResults = [];
 
-	                    var rtype = entity.tags.type;
-	                    taginfo.roles({
-	                        debounce: true,
-	                        rtype: rtype || '',
-	                        geometry: geometry,
-	                        query: role
-	                    }, function(err, data) {
-	                        if (!err) { callback(sort(role, data)); }
-	                    });
-	                })
-	                .on('cancel', function() {
-	                    role.property('value', origValue);
-	                })
-	            );
-	        }
+	      for (var id in allEntities) {
+	        var entity = allEntities[id];
+	        if (!entity) continue;
+	        var name = utilDisplayName(entity) || '';
+	        if (name.toLowerCase().indexOf(q) < 0) continue;
+	        var matched = _mainPresetIndex.match(entity, graph);
+	        var type = matched && matched.name() || utilDisplayType(entity.id);
+	        var extent = entity.extent(graph);
+	        var distance = extent ? geoSphericalDistance(visibleCenter, extent.center()) : 0;
+	        localResults.push({
+	          id: entity.id,
+	          entity: entity,
+	          geometry: entity.geometry(graph),
+	          type: type,
+	          name: name,
+	          distance: distance
+	        });
+	        if (localResults.length > 100) break;
+	      }
 
+	      localResults = localResults.sort(function byDistance(a, b) {
+	        return a.distance - b.distance;
+	      });
+	      result = result.concat(localResults);
+
+	      (_geocodeResults || []).forEach(function (d) {
+	        if (d.osm_type && d.osm_id) {
+	          // some results may be missing these - #1890
+	          // Make a temporary osmEntity so we can preset match
+	          // and better localize the search result - #4725
+	          var id = osmEntity.id.fromOSM(d.osm_type, d.osm_id);
+	          var tags = {};
+	          tags[d["class"]] = d.type;
+	          var attrs = {
+	            id: id,
+	            type: d.osm_type,
+	            tags: tags
+	          };
 
-	        function unbind() {
-	            var row = select(this);
+	          if (d.osm_type === 'way') {
+	            // for ways, add some fake closed nodes
+	            attrs.nodes = ['a', 'a']; // so that geometry area is possible
+	          }
 
-	            row.selectAll('input.member-role')
-	                .call(uiCombobox.off, context);
+	          var tempEntity = osmEntity(attrs);
+	          var tempGraph = coreGraph([tempEntity]);
+	          var matched = _mainPresetIndex.match(tempEntity, tempGraph);
+	          var type = matched && matched.name() || utilDisplayType(id);
+	          result.push({
+	            id: tempEntity.id,
+	            geometry: tempEntity.geometry(tempGraph),
+	            type: type,
+	            name: d.display_name,
+	            extent: new geoExtent([parseFloat(d.boundingbox[3]), parseFloat(d.boundingbox[0])], [parseFloat(d.boundingbox[2]), parseFloat(d.boundingbox[1])])
+	          });
 	        }
-	    }
-
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return section;
-	    };
+	      });
 
+	      if (q.match(/^[0-9]+$/)) {
+	        // if query is just a number, possibly an OSM ID without a prefix
+	        result.push({
+	          id: 'n' + q,
+	          geometry: 'point',
+	          type: _t('inspector.node'),
+	          name: q
+	        });
+	        result.push({
+	          id: 'w' + q,
+	          geometry: 'line',
+	          type: _t('inspector.way'),
+	          name: q
+	        });
+	        result.push({
+	          id: 'r' + q,
+	          geometry: 'relation',
+	          type: _t('inspector.relation'),
+	          name: q
+	        });
+	      }
 
-	    return section;
-	}
+	      return result;
+	    }
 
-	function uiSectionRawMembershipEditor(context) {
+	    function drawList() {
+	      var value = search.property('value');
+	      var results = features();
+	      list.classed('filtered', value.length);
+	      var resultsIndicator = list.selectAll('.no-results-item').data([0]).enter().append('button').property('disabled', true).attr('class', 'no-results-item').call(svgIcon('#iD-icon-alert', 'pre-text'));
+	      resultsIndicator.append('span').attr('class', 'entity-name');
+	      list.selectAll('.no-results-item .entity-name').html('').call(_t.append('geocoder.no_results_worldwide'));
 
-	    var section = uiSection('raw-membership-editor', context)
-	        .shouldDisplay(function() {
-	            return _entityIDs && _entityIDs.length === 1;
-	        })
-	        .title(function() {
-	            var entity = context.hasEntity(_entityIDs[0]);
-	            if (!entity) { return ''; }
-
-	            var parents = context.graph().parentRelations(entity);
-	            var gt = parents.length > _maxMemberships ? '>' : '';
-	            var count = gt + parents.slice(0, _maxMemberships).length;
-	            return _t('inspector.title_count', { title: _t('inspector.relations'), count: count });
-	        })
-	        .disclosureContent(renderDisclosureContent);
-
-	    var taginfo = services.taginfo;
-	    var nearbyCombo = uiCombobox(context, 'parent-relation')
-	        .minItems(1)
-	        .fetcher(fetchNearbyRelations)
-	        .itemsMouseEnter(function(d) {
-	            if (d.relation) { utilHighlightEntities([d.relation.id], true, context); }
-	        })
-	        .itemsMouseLeave(function(d) {
-	            if (d.relation) { utilHighlightEntities([d.relation.id], false, context); }
-	        });
-	    var _inChange = false;
-	    var _entityIDs = [];
-	    var _showBlank;
-	    var _maxMemberships = 1000;
+	      if (services.geocoder) {
+	        list.selectAll('.geocode-item').data([0]).enter().append('button').attr('class', 'geocode-item secondary-action').on('click', geocoderSearch).append('div').attr('class', 'label').append('span').attr('class', 'entity-name').call(_t.append('geocoder.search'));
+	      }
 
-	    function selectRelation(d) {
-	        event.preventDefault();
+	      list.selectAll('.no-results-item').style('display', value.length && !results.length ? 'block' : 'none');
+	      list.selectAll('.geocode-item').style('display', value && _geocodeResults === undefined ? 'block' : 'none');
+	      list.selectAll('.feature-list-item').data([-1]).remove();
+	      var items = list.selectAll('.feature-list-item').data(results, function (d) {
+	        return d.id;
+	      });
+	      var enter = items.enter().insert('button', '.geocode-item').attr('class', 'feature-list-item').on('mouseover', mouseover).on('mouseout', mouseout).on('click', click);
+	      var label = enter.append('div').attr('class', 'label');
+	      label.each(function (d) {
+	        select(this).call(svgIcon('#iD-icon-' + d.geometry, 'pre-text'));
+	      });
+	      label.append('span').attr('class', 'entity-type').text(function (d) {
+	        return d.type;
+	      });
+	      label.append('span').attr('class', 'entity-name').text(function (d) {
+	        return d.name;
+	      });
+	      enter.style('opacity', 0).transition().style('opacity', 1);
+	      items.order();
+	      items.exit().remove();
+	    }
 
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.relation.id], false, context);
+	    function mouseover(d3_event, d) {
+	      if (d.id === -1) return;
+	      utilHighlightEntities([d.id], true, context);
+	    }
 
-	        context.enter(modeSelect(context, [d.relation.id]));
+	    function mouseout(d3_event, d) {
+	      if (d.id === -1) return;
+	      utilHighlightEntities([d.id], false, context);
 	    }
 
-	    function zoomToRelation(d) {
-	        event.preventDefault();
+	    function click(d3_event, d) {
+	      d3_event.preventDefault();
 
-	        var entity = context.entity(d.relation.id);
-	        context.map().zoomToEase(entity);
+	      if (d.location) {
+	        context.map().centerZoomEase([d.location[1], d.location[0]], 19);
+	      } else if (d.entity) {
+	        utilHighlightEntities([d.id], false, context);
+	        context.enter(modeSelect(context, [d.entity.id]));
+	        context.map().zoomToEase(d.entity);
+	      } else {
+	        // download, zoom to, and select the entity with the given ID
+	        context.zoomToEntity(d.id);
+	      }
+	    }
 
-	        // highlight the relation in case it wasn't previously on-screen
-	        utilHighlightEntities([d.relation.id], true, context);
+	    function geocoderSearch() {
+	      services.geocoder.search(search.property('value'), function (err, resp) {
+	        _geocodeResults = resp || [];
+	        drawList();
+	      });
 	    }
+	  }
 
+	  return featureList;
+	}
+
+	function uiImproveOsmComments() {
+	  var _qaItem;
 
-	    function changeRole(d) {
-	        if (d === 0) { return; }    // called on newrow (shoudn't happen)
-	        if (_inChange) { return; }  // avoid accidental recursive call #5731
+	  function issueComments(selection) {
+	    // make the div immediately so it appears above the buttons
+	    var comments = selection.selectAll('.comments-container').data([0]);
+	    comments = comments.enter().append('div').attr('class', 'comments-container').merge(comments); // must retrieve comments from API before they can be displayed
 
-	        var oldRole = d.member.role;
-	        var newRole = context.cleanRelationRole(select(this).property('value'));
+	    services.improveOSM.getComments(_qaItem).then(function (d) {
+	      if (!d.comments) return; // nothing to do here
+
+	      var commentEnter = comments.selectAll('.comment').data(d.comments).enter().append('div').attr('class', 'comment');
+	      commentEnter.append('div').attr('class', 'comment-avatar').call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
+	      var mainEnter = commentEnter.append('div').attr('class', 'comment-main');
+	      var metadataEnter = mainEnter.append('div').attr('class', 'comment-metadata');
+	      metadataEnter.append('div').attr('class', 'comment-author').each(function (d) {
+	        var osm = services.osm;
+	        var selection = select(this);
 
-	        if (oldRole !== newRole) {
-	            _inChange = true;
-	            context.perform(
-	                actionChangeMember(d.relation.id, Object.assign({}, d.member, { role: newRole }), d.index),
-	                _t('operations.change_role.annotation')
-	            );
+	        if (osm && d.username) {
+	          selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.username)).attr('target', '_blank');
 	        }
-	        _inChange = false;
-	    }
 
+	        selection.text(function (d) {
+	          return d.username;
+	        });
+	      });
+	      metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
+	        return _t.html('note.status.commented', {
+	          when: localeDateString(d.timestamp)
+	        });
+	      });
+	      mainEnter.append('div').attr('class', 'comment-text').append('p').text(function (d) {
+	        return d.text;
+	      });
+	    })["catch"](function (err) {
+	      console.log(err); // eslint-disable-line no-console
+	    });
+	  }
 
-	    function addMembership(d, role) {
-	        this.blur();           // avoid keeping focus on the button
-	        _showBlank = false;
+	  function localeDateString(s) {
+	    if (!s) return null;
+	    var options = {
+	      day: 'numeric',
+	      month: 'short',
+	      year: 'numeric'
+	    };
+	    var d = new Date(s * 1000); // timestamp is served in seconds, date takes ms
 
-	        var member = { id: _entityIDs[0], type: context.entity(_entityIDs[0]).type, role: role };
+	    if (isNaN(d.getTime())) return null;
+	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	  }
 
-	        if (d.relation) {
-	            context.perform(
-	                actionAddMember(d.relation.id, member),
-	                _t('operations.add_member.annotation')
-	            );
+	  issueComments.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return issueComments;
+	  };
 
-	        } else {
-	            var relation = osmRelation();
-	            context.perform(
-	                actionAddEntity(relation),
-	                actionAddMember(relation.id, member),
-	                _t('operations.add.annotation.relation')
-	            );
+	  return issueComments;
+	}
 
-	            context.enter(modeSelect(context, [relation.id]).newFeature(true));
-	        }
-	    }
+	function uiImproveOsmDetails(context) {
+	  var _qaItem;
 
+	  function issueDetail(d) {
+	    if (d.desc) return d.desc;
+	    var issueKey = d.issueKey;
+	    d.replacements = d.replacements || {};
+	    d.replacements["default"] = {
+	      html: _t.html('inspector.unknown')
+	    }; // special key `default` works as a fallback string
 
-	    function deleteMembership(d) {
-	        this.blur();           // avoid keeping focus on the button
-	        if (d === 0) { return; }   // called on newrow (shoudn't happen)
+	    return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".description"), d.replacements);
+	  }
 
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.relation.id], false, context);
+	  function improveOsmDetails(selection) {
+	    var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    details.exit().remove();
+	    var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
 
-	        context.perform(
-	            actionDeleteMember(d.relation.id, d.index),
-	            _t('operations.delete_member.annotation')
-	        );
-	    }
+	    var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	    descriptionEnter.append('h4').call(_t.append('QA.keepRight.detail_description'));
+	    descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..
 
+	    var relatedEntities = [];
+	    descriptionEnter.selectAll('.error_entity_link, .error_object_link').attr('href', '#').each(function () {
+	      var link = select(this);
+	      var isObjectLink = link.classed('error_object_link');
+	      var entityID = isObjectLink ? utilEntityRoot(_qaItem.objectType) + _qaItem.objectId : this.textContent;
+	      var entity = context.hasEntity(entityID);
+	      relatedEntities.push(entityID); // Add click handler
 
-	    function fetchNearbyRelations(q, callback) {
-	        var newRelation = { relation: null, value: _t('inspector.new_relation') };
+	      link.on('mouseenter', function () {
+	        utilHighlightEntities([entityID], true, context);
+	      }).on('mouseleave', function () {
+	        utilHighlightEntities([entityID], false, context);
+	      }).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        utilHighlightEntities([entityID], false, context);
+	        var osmlayer = context.layers().layer('osm');
 
-	        var entityID = _entityIDs[0];
+	        if (!osmlayer.enabled()) {
+	          osmlayer.enabled(true);
+	        }
 
-	        var result = [];
+	        context.map().centerZoom(_qaItem.loc, 20);
 
-	        var graph = context.graph();
+	        if (entity) {
+	          context.enter(modeSelect(context, [entityID]));
+	        } else {
+	          context.loadEntity(entityID, function (err, result) {
+	            if (err) return;
+	            var entity = result.data.find(function (e) {
+	              return e.id === entityID;
+	            });
+	            if (entity) context.enter(modeSelect(context, [entityID]));
+	          });
+	        }
+	      }); // Replace with friendly name if possible
+	      // (The entity may not yet be loaded into the graph)
 
-	        function baseDisplayLabel(entity) {
-	            var matched = _mainPresetIndex.match(entity, graph);
-	            var presetName = (matched && matched.name()) || _t('inspector.relation');
-	            var entityName = utilDisplayName(entity) || '';
+	      if (entity) {
+	        var name = utilDisplayName(entity); // try to use common name
 
-	            return presetName + ' ' + entityName;
+	        if (!name && !isObjectLink) {
+	          var preset = _mainPresetIndex.match(entity, context.graph());
+	          name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
 	        }
 
-	        var explicitRelation = q && context.hasEntity(q.toLowerCase());
-	        if (explicitRelation && explicitRelation.type === 'relation' && explicitRelation.id !== entityID) {
-	            // loaded relation is specified explicitly, only show that
+	        if (name) {
+	          this.innerText = name;
+	        }
+	      }
+	    }); // Don't hide entities related to this error - #5880
 
-	            result.push({
-	                relation: explicitRelation,
-	                value: baseDisplayLabel(explicitRelation) + ' ' + explicitRelation.id
-	            });
-	        } else {
+	    context.features().forceVisible(relatedEntities);
+	    context.map().pan([0, 0]); // trigger a redraw
+	  }
 
-	            context.history().intersects(context.map().extent()).forEach(function(entity) {
-	                if (entity.type !== 'relation' || entity.id === entityID) { return; }
+	  improveOsmDetails.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return improveOsmDetails;
+	  };
 
-	                var value = baseDisplayLabel(entity);
-	                if (q && (value + ' ' + entity.id).toLowerCase().indexOf(q.toLowerCase()) === -1) { return; }
+	  return improveOsmDetails;
+	}
 
-	                result.push({ relation: entity, value: value });
-	            });
+	function uiImproveOsmHeader() {
+	  var _qaItem;
 
-	            result.sort(function(a, b) {
-	                return osmRelation.creationOrder(a.relation, b.relation);
-	            });
+	  function issueTitle(d) {
+	    var issueKey = d.issueKey;
+	    d.replacements = d.replacements || {};
+	    d.replacements["default"] = {
+	      html: _t.html('inspector.unknown')
+	    }; // special key `default` works as a fallback string
 
-	            // Dedupe identical names by appending relation id - see #2891
-	            var dupeGroups = Object.values(utilArrayGroupBy(result, 'value'))
-	                .filter(function(v) { return v.length > 1; });
+	    return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".title"), d.replacements);
+	  }
 
-	            dupeGroups.forEach(function(group) {
-	                group.forEach(function(obj) {
-	                    obj.value += ' ' + obj.relation.id;
-	                });
-	            });
-	        }
+	  function improveOsmHeader(selection) {
+	    var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    header.exit().remove();
+	    var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+	    var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+	      return d.id < 0;
+	    }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
+	      return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+	    });
+	    svgEnter.append('polygon').attr('fill', 'currentColor').attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+	    svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
+	      var picon = d.icon;
 
-	        result.forEach(function(obj) {
-	            obj.title = obj.value;
-	        });
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
+	      }
+	    });
+	    headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
+	  }
 
-	        result.unshift(newRelation);
-	        callback(result);
-	    }
+	  improveOsmHeader.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return improveOsmHeader;
+	  };
 
-	    function renderDisclosureContent(selection) {
+	  return improveOsmHeader;
+	}
 
-	        var entityID = _entityIDs[0];
+	function uiImproveOsmEditor(context) {
+	  var dispatch = dispatch$8('change');
+	  var qaDetails = uiImproveOsmDetails(context);
+	  var qaComments = uiImproveOsmComments();
+	  var qaHeader = uiImproveOsmHeader();
 
-	        var entity = context.entity(entityID);
-	        var parents = context.graph().parentRelations(entity);
+	  var _qaItem;
 
-	        var memberships = [];
+	  function improveOsmEditor(selection) {
+	    var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+	      return context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h2').call(_t.append('QA.improveOSM.title'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body);
+	    var editor = body.selectAll('.qa-editor').data([0]);
+	    editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(qaComments.issue(_qaItem)).call(improveOsmSaveSection);
+	  }
 
-	        parents.slice(0, _maxMemberships).forEach(function(relation) {
-	            relation.members.forEach(function(member, index) {
-	                if (member.id === entity.id) {
-	                    memberships.push({
-	                        relation: relation,
-	                        member: member,
-	                        index: index,
-	                        domId: utilUniqueDomId(entityID + '-membership-' + relation.id + '-' + index)
-	                    });
-	                }
-	            });
-	        });
+	  function improveOsmSaveSection(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+
+	    var isShown = _qaItem && (isSelected || _qaItem.newComment || _qaItem.comment);
+	    var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    }); // exit
+
+	    saveSection.exit().remove(); // enter
+
+	    var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
+	    saveSectionEnter.append('h4').attr('class', '.qa-save-header').call(_t.append('note.newComment'));
+	    saveSectionEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('QA.keepRight.comment_placeholder')).attr('maxlength', 1000).property('value', function (d) {
+	      return d.newComment;
+	    }).call(utilNoAuto).on('input', changeInput).on('blur', changeInput); // update
+
+	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
-	        var list = selection.selectAll('.member-list')
-	            .data([0]);
+	    function changeInput() {
+	      var input = select(this);
+	      var val = input.property('value').trim();
+
+	      if (val === '') {
+	        val = undefined;
+	      } // store the unsaved comment with the issue itself
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'member-list')
-	            .merge(list);
 
+	      _qaItem = _qaItem.update({
+	        newComment: val
+	      });
+	      var qaService = services.improveOSM;
+
+	      if (qaService) {
+	        qaService.replaceItem(_qaItem);
+	      }
 
-	        var items = list.selectAll('li.member-row-normal')
-	            .data(memberships, function(d) {
-	                return osmEntity.key(d.relation) + ',' + d.index;
-	            });
+	      saveSection.call(qaSaveButtons);
+	    }
+	  }
 
-	        items.exit()
-	            .each(unbind)
-	            .remove();
-
-	        // Enter
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', 'member-row member-row-normal form-field');
-
-	        // highlight the relation in the map while hovering on the list item
-	        itemsEnter.on('mouseover', function(d) {
-	                utilHighlightEntities([d.relation.id], true, context);
-	            })
-	            .on('mouseout', function(d) {
-	                utilHighlightEntities([d.relation.id], false, context);
-	            });
+	  function qaSaveButtons(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	        var labelEnter = itemsEnter
-	            .append('label')
-	            .attr('class', 'field-label')
-	            .attr('for', function(d) {
-	                return d.domId;
-	            });
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	        var labelLink = labelEnter
-	            .append('span')
-	            .attr('class', 'label-text')
-	            .append('a')
-	            .attr('href', '#')
-	            .on('click', selectRelation);
-
-	        labelLink
-	            .append('span')
-	            .attr('class', 'member-entity-type')
-	            .text(function(d) {
-	                var matched = _mainPresetIndex.match(d.relation, context.graph());
-	                return (matched && matched.name()) || _t('inspector.relation');
-	            });
+	    buttonSection.exit().remove(); // enter
 
-	        labelLink
-	            .append('span')
-	            .attr('class', 'member-entity-name')
-	            .text(function(d) { return utilDisplayName(d.relation); });
-
-	        labelEnter
-	            .append('button')
-	            .attr('tabindex', -1)
-	            .attr('class', 'remove member-delete')
-	            .call(svgIcon('#iD-operation-delete'))
-	            .on('click', deleteMembership);
-
-	        labelEnter
-	            .append('button')
-	            .attr('class', 'member-zoom')
-	            .attr('title', _t('icons.zoom_to'))
-	            .call(svgIcon('#iD-icon-framed-dot', 'monochrome'))
-	            .on('click', zoomToRelation);
-
-	        var wrapEnter = itemsEnter
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-member');
-
-	        wrapEnter
-	            .append('input')
-	            .attr('class', 'member-role')
-	            .attr('id', function(d) {
-	                return d.domId;
-	            })
-	            .property('type', 'text')
-	            .attr('placeholder', _t('inspector.role'))
-	            .call(utilNoAuto)
-	            .property('value', function(d) { return d.member.role; })
-	            .on('blur', changeRole)
-	            .on('change', changeRole);
-
-	        if (taginfo) {
-	            wrapEnter.each(bindTypeahead);
-	        }
-
-
-	        var newMembership = list.selectAll('.member-row-new')
-	            .data(_showBlank ? [0] : []);
-
-	        // Exit
-	        newMembership.exit()
-	            .remove();
-
-	        // Enter
-	        var newMembershipEnter = newMembership.enter()
-	            .append('li')
-	            .attr('class', 'member-row member-row-new form-field');
-
-	        var newLabelEnter = newMembershipEnter
-	            .append('label')
-	            .attr('class', 'field-label');
-
-	        newLabelEnter
-	            .append('input')
-	            .attr('placeholder', _t('inspector.choose_relation'))
-	            .attr('type', 'text')
-	            .attr('class', 'member-entity-input')
-	            .call(utilNoAuto);
-
-	        newLabelEnter
-	            .append('button')
-	            .attr('tabindex', -1)
-	            .attr('class', 'remove member-delete')
-	            .call(svgIcon('#iD-operation-delete'))
-	            .on('click', function() {
-	                list.selectAll('.member-row-new')
-	                    .remove();
-	            });
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+	    buttonEnter.append('button').attr('class', 'button comment-button action').call(_t.append('QA.keepRight.save_comment'));
+	    buttonEnter.append('button').attr('class', 'button close-button action');
+	    buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
-	        var newWrapEnter = newMembershipEnter
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-member');
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.select('.comment-button').attr('disabled', function (d) {
+	      return d.newComment ? null : true;
+	    }).on('click.comment', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	        newWrapEnter
-	            .append('input')
-	            .attr('class', 'member-role')
-	            .property('type', 'text')
-	            .attr('placeholder', _t('inspector.role'))
-	            .call(utilNoAuto);
+	      var qaService = services.improveOSM;
 
-	        // Update
-	        newMembership = newMembership
-	            .merge(newMembershipEnter);
+	      if (qaService) {
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
+	    });
+	    buttonSection.select('.close-button').html(function (d) {
+	      var andComment = d.newComment ? '_comment' : '';
+	      return _t.html("QA.keepRight.close".concat(andComment));
+	    }).on('click.close', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	        newMembership.selectAll('.member-entity-input')
-	            .on('blur', cancelEntity)   // if it wasn't accepted normally, cancel it
-	            .call(nearbyCombo
-	                .on('accept', acceptEntity)
-	                .on('cancel', cancelEntity)
-	            );
+	      var qaService = services.improveOSM;
 
+	      if (qaService) {
+	        d.newStatus = 'SOLVED';
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
+	    });
+	    buttonSection.select('.ignore-button').html(function (d) {
+	      var andComment = d.newComment ? '_comment' : '';
+	      return _t.html("QA.keepRight.ignore".concat(andComment));
+	    }).on('click.ignore', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	        // Container for the Add button
-	        var addRow = selection.selectAll('.add-row')
-	            .data([0]);
+	      var qaService = services.improveOSM;
 
-	        // enter
-	        var addRowEnter = addRow.enter()
-	            .append('div')
-	            .attr('class', 'add-row');
+	      if (qaService) {
+	        d.newStatus = 'INVALID';
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
+	    });
+	  } // NOTE: Don't change method name until UI v3 is merged
 
-	        var addRelationButton = addRowEnter
-	            .append('button')
-	            .attr('class', 'add-relation');
 
-	        addRelationButton
-	            .call(svgIcon('#iD-icon-plus', 'light'));
-	        addRelationButton
-	            .call(uiTooltip().title(_t('inspector.add_to_relation')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left'));
+	  improveOsmEditor.error = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return improveOsmEditor;
+	  };
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-value');   // preserve space
+	  return utilRebind(improveOsmEditor, dispatch, 'on');
+	}
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-buttons');  // preserve space
+	function uiPresetList(context) {
+	  var dispatch = dispatch$8('cancel', 'choose');
 
-	        // update
-	        addRow = addRow
-	            .merge(addRowEnter);
+	  var _entityIDs;
 
-	        addRow.select('.add-relation')
-	            .on('click', function() {
-	                _showBlank = true;
-	                section.reRender();
-	                list.selectAll('.member-entity-input').node().focus();
-	            });
+	  var _currLoc;
+
+	  var _currentPresets;
+
+	  var _autofocus = false;
+
+	  function presetList(selection) {
+	    if (!_entityIDs) return;
+	    var presets = _mainPresetIndex.matchAllGeometry(entityGeometries());
+	    selection.html('');
+	    var messagewrap = selection.append('div').attr('class', 'header fillL');
+	    var message = messagewrap.append('h2').call(_t.append('inspector.choose'));
+	    var direction = _mainLocalizer.textDirection() === 'rtl' ? 'backward' : 'forward';
+	    messagewrap.append('button').attr('class', 'preset-choose').attr('title', direction).on('click', function () {
+	      dispatch.call('cancel', this);
+	    }).call(svgIcon("#iD-icon-".concat(direction)));
+
+	    function initialKeydown(d3_event) {
+	      // hack to let delete shortcut work when search is autofocused
+	      if (search.property('value').length === 0 && (d3_event.keyCode === utilKeybinding.keyCodes['⌫'] || d3_event.keyCode === utilKeybinding.keyCodes['⌦'])) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        operationDelete(context, _entityIDs)(); // hack to let undo work when search is autofocused
+	      } else if (search.property('value').length === 0 && (d3_event.ctrlKey || d3_event.metaKey) && d3_event.keyCode === utilKeybinding.keyCodes.z) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        context.undo();
+	      } else if (!d3_event.ctrlKey && !d3_event.metaKey) {
+	        // don't check for delete/undo hack on future keydown events
+	        select(this).on('keydown', keydown);
+	        keydown.call(this, d3_event);
+	      }
+	    }
 
+	    function keydown(d3_event) {
+	      // down arrow
+	      if (d3_event.keyCode === utilKeybinding.keyCodes['↓'] && // if insertion point is at the end of the string
+	      search.node().selectionStart === search.property('value').length) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation(); // move focus to the first item in the preset list
 
-	        function acceptEntity(d) {
-	            if (!d) {
-	                cancelEntity();
-	                return;
-	            }
-	            // remove hover-higlighting
-	            if (d.relation) { utilHighlightEntities([d.relation.id], false, context); }
+	        var buttons = list.selectAll('.preset-list-button');
+	        if (!buttons.empty()) buttons.nodes()[0].focus();
+	      }
+	    }
 
-	            var role = context.cleanRelationRole(list.selectAll('.member-row-new .member-role').property('value'));
-	            addMembership(d, role);
-	        }
+	    function keypress(d3_event) {
+	      // enter
+	      var value = search.property('value');
 
+	      if (d3_event.keyCode === 13 && // ↩ Return
+	      value.length) {
+	        list.selectAll('.preset-list-item:first-child').each(function (d) {
+	          d.choose.call(this);
+	        });
+	      }
+	    }
 
-	        function cancelEntity() {
-	            var input = newMembership.selectAll('.member-entity-input');
-	            input.property('value', '');
+	    function inputevent() {
+	      var value = search.property('value');
+	      list.classed('filtered', value.length);
+	      var results, messageText;
 
-	            // remove hover-higlighting
-	            context.surface().selectAll('.highlighted')
-	                .classed('highlighted', false);
-	        }
+	      if (value.length) {
+	        results = presets.search(value, entityGeometries()[0], _currLoc);
+	        messageText = _t.html('inspector.results', {
+	          n: results.collection.length,
+	          search: value
+	        });
+	      } else {
+	        results = _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro(), _currLoc);
+	        messageText = _t.html('inspector.choose');
+	      }
 
+	      list.call(drawList, results);
+	      message.html(messageText);
+	    }
 
-	        function bindTypeahead(d) {
-	            var row = select(this);
-	            var role = row.selectAll('input.member-role');
-	            var origValue = role.property('value');
+	    var searchWrap = selection.append('div').attr('class', 'search-header');
+	    searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
+	    var search = searchWrap.append('input').attr('class', 'preset-search-input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keydown', initialKeydown).on('keypress', keypress).on('input', debounce(inputevent));
 
-	            function sort(value, data) {
-	                var sameletter = [];
-	                var other = [];
-	                for (var i = 0; i < data.length; i++) {
-	                    if (data[i].value.substring(0, value.length) === value) {
-	                        sameletter.push(data[i]);
-	                    } else {
-	                        other.push(data[i]);
-	                    }
-	                }
-	                return sameletter.concat(other);
-	            }
+	    if (_autofocus) {
+	      search.node().focus(); // Safari 14 doesn't always like to focus immediately,
+	      // so try again on the next pass
 
-	            role.call(uiCombobox(context, 'member-role')
-	                .fetcher(function(role, callback) {
-	                    var rtype = d.relation.tags.type;
-	                    taginfo.roles({
-	                        debounce: true,
-	                        rtype: rtype || '',
-	                        geometry: context.graph().geometry(entityID),
-	                        query: role
-	                    }, function(err, data) {
-	                        if (!err) { callback(sort(role, data)); }
-	                    });
-	                })
-	                .on('cancel', function() {
-	                    role.property('value', origValue);
-	                })
-	            );
-	        }
+	      setTimeout(function () {
+	        search.node().focus();
+	      }, 0);
+	    }
 
+	    var listWrap = selection.append('div').attr('class', 'inspector-body');
+	    var list = listWrap.append('div').attr('class', 'preset-list').call(drawList, _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro(), _currLoc));
+	    context.features().on('change.preset-list', updateForFeatureHiddenState);
+	  }
 
-	        function unbind() {
-	            var row = select(this);
+	  function drawList(list, presets) {
+	    presets = presets.matchAllGeometry(entityGeometries());
+	    var collection = presets.collection.reduce(function (collection, preset) {
+	      if (!preset) return collection;
 
-	            row.selectAll('input.member-role')
-	                .call(uiCombobox.off, context);
+	      if (preset.members) {
+	        if (preset.members.collection.filter(function (preset) {
+	          return preset.addable();
+	        }).length > 1) {
+	          collection.push(CategoryItem(preset));
 	        }
-	    }
+	      } else if (preset.addable()) {
+	        collection.push(PresetItem(preset));
+	      }
 
+	      return collection;
+	    }, []);
+	    var items = list.selectAll('.preset-list-item').data(collection, function (d) {
+	      return d.preset.id;
+	    });
+	    items.order();
+	    items.exit().remove();
+	    items.enter().append('div').attr('class', function (item) {
+	      return 'preset-list-item preset-' + item.preset.id.replace('/', '-');
+	    }).classed('current', function (item) {
+	      return _currentPresets.indexOf(item.preset) !== -1;
+	    }).each(function (item) {
+	      select(this).call(item);
+	    }).style('opacity', 0).transition().style('opacity', 1);
+	    updateForFeatureHiddenState();
+	  }
+
+	  function itemKeydown(d3_event) {
+	    // the actively focused item
+	    var item = select(this.closest('.preset-list-item'));
+	    var parentItem = select(item.node().parentNode.closest('.preset-list-item')); // arrow down, move focus to the next, lower item
+
+	    if (d3_event.keyCode === utilKeybinding.keyCodes['↓']) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation(); // the next item in the list at the same level
+
+	      var nextItem = select(item.node().nextElementSibling); // if there is no next item in this list
+
+	      if (nextItem.empty()) {
+	        // if there is a parent item
+	        if (!parentItem.empty()) {
+	          // the item is the last item of a sublist,
+	          // select the next item at the parent level
+	          nextItem = select(parentItem.node().nextElementSibling);
+	        } // if the focused item is expanded
+
+	      } else if (select(this).classed('expanded')) {
+	        // select the first subitem instead
+	        nextItem = item.select('.subgrid .preset-list-item:first-child');
+	      }
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        _showBlank = false;
-	        return section;
-	    };
+	      if (!nextItem.empty()) {
+	        // focus on the next item
+	        nextItem.select('.preset-list-button').node().focus();
+	      } // arrow up, move focus to the previous, higher item
 
+	    } else if (d3_event.keyCode === utilKeybinding.keyCodes['↑']) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation(); // the previous item in the list at the same level
 
-	    return section;
-	}
+	      var previousItem = select(item.node().previousElementSibling); // if there is no previous item in this list
 
-	function uiSectionSelectionList(context) {
+	      if (previousItem.empty()) {
+	        // if there is a parent item
+	        if (!parentItem.empty()) {
+	          // the item is the first subitem of a sublist select the parent item
+	          previousItem = parentItem;
+	        } // if the previous item is expanded
 
-	    var _selectedIDs = [];
+	      } else if (previousItem.select('.preset-list-button').classed('expanded')) {
+	        // select the last subitem of the sublist of the previous item
+	        previousItem = previousItem.select('.subgrid .preset-list-item:last-child');
+	      }
 
-	    var section = uiSection('selected-features', context)
-	        .shouldDisplay(function() {
-	            return _selectedIDs.length > 1;
-	        })
-	        .title(function() {
-	            return _t('inspector.title_count', { title: _t('inspector.features'), count: _selectedIDs.length });
-	        })
-	        .disclosureContent(renderDisclosureContent);
+	      if (!previousItem.empty()) {
+	        // focus on the previous item
+	        previousItem.select('.preset-list-button').node().focus();
+	      } else {
+	        // the focus is at the top of the list, move focus back to the search field
+	        var search = select(this.closest('.preset-list-pane')).select('.preset-search-input');
+	        search.node().focus();
+	      } // arrow left, move focus to the parent item if there is one
 
-	    context.history()
-	        .on('change.selectionList', function(difference) {
-	            if (difference) {
-	                section.reRender();
-	            }
-	        });
+	    } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation(); // if there is a parent item, focus on the parent item
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _selectedIDs; }
-	        _selectedIDs = val;
-	        return section;
-	    };
+	      if (!parentItem.empty()) {
+	        parentItem.select('.preset-list-button').node().focus();
+	      } // arrow right, choose this item
 
-	    function selectEntity(entity) {
-	        context.enter(modeSelect(context, [entity.id]));
+	    } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      item.datum().choose.call(select(this).node());
 	    }
+	  }
+
+	  function CategoryItem(preset) {
+	    var box,
+	        sublist,
+	        shown = false;
 
-	    function deselectEntity(entity) {
-	        event.stopPropagation();
+	    function item(selection) {
+	      var wrap = selection.append('div').attr('class', 'preset-list-button-wrap category');
 
-	        var selectedIDs = _selectedIDs.slice();
-	        var index = selectedIDs.indexOf(entity.id);
-	        if (index > -1) {
-	            selectedIDs.splice(index, 1);
-	            context.enter(modeSelect(context, selectedIDs));
+	      function click() {
+	        var isExpanded = select(this).classed('expanded');
+	        var iconName = isExpanded ? _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward' : '#iD-icon-down';
+	        select(this).classed('expanded', !isExpanded).attr('title', !isExpanded ? _t('icons.collapse') : _t('icons.expand'));
+	        select(this).selectAll('div.label-inner svg.icon use').attr('href', iconName);
+	        item.choose();
+	      }
+
+	      var geometries = entityGeometries();
+	      var button = wrap.append('button').attr('class', 'preset-list-button').attr('title', _t('icons.expand')).classed('expanded', false).call(uiPresetIcon().geometry(geometries.length === 1 && geometries[0]).preset(preset)).on('click', click).on('keydown', function (d3_event) {
+	        // right arrow, expand the focused item
+	        if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
+	          d3_event.preventDefault();
+	          d3_event.stopPropagation(); // if the item isn't expanded
+
+	          if (!select(this).classed('expanded')) {
+	            // toggle expansion (expand the item)
+	            click.call(this, d3_event);
+	          } // left arrow, collapse the focused item
+
+	        } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
+	          d3_event.preventDefault();
+	          d3_event.stopPropagation(); // if the item is expanded
+
+	          if (select(this).classed('expanded')) {
+	            // toggle expansion (collapse the item)
+	            click.call(this, d3_event);
+	          }
+	        } else {
+	          itemKeydown.call(this, d3_event);
 	        }
+	      });
+	      var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+	      label.append('div').attr('class', 'namepart').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline')).append('span').html(function () {
+	        return preset.nameLabel() + '&hellip;';
+	      });
+	      box = selection.append('div').attr('class', 'subgrid').style('max-height', '0px').style('opacity', 0);
+	      box.append('div').attr('class', 'arrow');
+	      sublist = box.append('div').attr('class', 'preset-list fillL3');
 	    }
 
-	    function renderDisclosureContent(selection) {
+	    item.choose = function () {
+	      if (!box || !sublist) return;
 
-	        var list = selection.selectAll('.feature-list')
-	            .data([0]);
+	      if (shown) {
+	        shown = false;
+	        box.transition().duration(200).style('opacity', '0').style('max-height', '0px').style('padding-bottom', '0px');
+	      } else {
+	        shown = true;
+	        var members = preset.members.matchAllGeometry(entityGeometries());
+	        sublist.call(drawList, members);
+	        box.transition().duration(200).style('opacity', '1').style('max-height', 200 + members.collection.length * 190 + 'px').style('padding-bottom', '10px');
+	      }
+	    };
 
-	        list = list.enter()
-	            .append('div')
-	            .attr('class', 'feature-list')
-	            .merge(list);
+	    item.preset = preset;
+	    return item;
+	  }
 
-	        var entities = _selectedIDs
-	            .map(function(id) { return context.hasEntity(id); })
-	            .filter(Boolean);
+	  function PresetItem(preset) {
+	    function item(selection) {
+	      var wrap = selection.append('div').attr('class', 'preset-list-button-wrap');
+	      var geometries = entityGeometries();
+	      var button = wrap.append('button').attr('class', 'preset-list-button').call(uiPresetIcon().geometry(geometries.length === 1 && geometries[0]).preset(preset)).on('click', item.choose).on('keydown', itemKeydown);
+	      var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+	      var nameparts = [preset.nameLabel(), preset.subtitleLabel()].filter(Boolean);
+	      label.selectAll('.namepart').data(nameparts).enter().append('div').attr('class', 'namepart').html(function (d) {
+	        return d;
+	      });
+	      wrap.call(item.reference.button);
+	      selection.call(item.reference.body);
+	    }
 
-	        var items = list.selectAll('.feature-list-item')
-	            .data(entities, osmEntity.key);
+	    item.choose = function () {
+	      if (select(this).classed('disabled')) return;
 
-	        items.exit()
-	            .remove();
+	      if (!context.inIntro()) {
+	        _mainPresetIndex.setMostRecent(preset, entityGeometries()[0]);
+	      }
 
-	        // Enter
-	        var enter = items.enter()
-	            .append('div')
-	            .attr('class', 'feature-list-item')
-	            .on('click', selectEntity);
+	      context.perform(function (graph) {
+	        for (var i in _entityIDs) {
+	          var entityID = _entityIDs[i];
+	          var oldPreset = _mainPresetIndex.match(graph.entity(entityID), graph);
+	          graph = actionChangePreset(entityID, oldPreset, preset)(graph);
+	        }
 
-	        enter
-	            .each(function(d) {
-	                select(this).on('mouseover', function() {
-	                    utilHighlightEntities([d.id], true, context);
-	                });
-	                select(this).on('mouseout', function() {
-	                    utilHighlightEntities([d.id], false, context);
-	                });
-	            });
+	        return graph;
+	      }, _t('operations.change_tags.annotation'));
+	      context.validator().validate(); // rerun validation
 
-	        var label = enter
-	            .append('button')
-	            .attr('class', 'label');
-
-	        enter
-	            .append('button')
-	            .attr('class', 'close')
-	            .attr('title', _t('icons.deselect'))
-	            .on('click', deselectEntity)
-	            .call(svgIcon('#iD-icon-close'));
-
-	        label
-	            .append('span')
-	            .attr('class', 'entity-geom-icon')
-	            .call(svgIcon('', 'pre-text'));
-
-	        label
-	            .append('span')
-	            .attr('class', 'entity-type');
-
-	        label
-	            .append('span')
-	            .attr('class', 'entity-name');
-
-	        // Update
-	        items = items.merge(enter);
-
-	        items.selectAll('.entity-geom-icon use')
-	            .attr('href', function() {
-	                var entity = this.parentNode.parentNode.__data__;
-	                return '#iD-icon-' + entity.geometry(context.graph());
-	            });
+	      dispatch.call('choose', this, preset);
+	    };
 
-	        items.selectAll('.entity-type')
-	            .text(function(entity) { return _mainPresetIndex.match(entity, context.graph()).name(); });
+	    item.help = function (d3_event) {
+	      d3_event.stopPropagation();
+	      item.reference.toggle();
+	    };
 
-	        items.selectAll('.entity-name')
-	            .text(function(d) {
-	                // fetch latest entity
-	                var entity = context.entity(d.id);
-	                return utilDisplayName(entity);
-	            });
-	    }
+	    item.preset = preset;
+	    item.reference = uiTagReference(preset.reference());
+	    return item;
+	  }
 
-	    return section;
-	}
+	  function updateForFeatureHiddenState() {
+	    if (!_entityIDs.every(context.hasEntity)) return;
+	    var geometries = entityGeometries();
+	    var button = context.container().selectAll('.preset-list .preset-list-button'); // remove existing tooltips
 
-	function uiEntityEditor(context) {
-	    var dispatch$1 = dispatch('choose');
-	    var _state = 'select';
-	    var _coalesceChanges = false;
-	    var _modified = false;
-	    var _base;
-	    var _entityIDs;
-	    var _activePresets = [];
-	    var _newFeature;
+	    button.call(uiTooltip().destroyAny);
+	    button.each(function (item, index) {
+	      var hiddenPresetFeaturesId;
 
-	    var _sections;
+	      for (var i in geometries) {
+	        hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
+	        if (hiddenPresetFeaturesId) break;
+	      }
 
-	    function entityEditor(selection) {
+	      var isHiddenPreset = !context.inIntro() && !!hiddenPresetFeaturesId && (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
+	      select(this).classed('disabled', isHiddenPreset);
 
-	        var combinedTags = utilCombinedTags(_entityIDs, context.graph());
+	      if (isHiddenPreset) {
+	        var isAutoHidden = context.features().autoHidden(hiddenPresetFeaturesId);
+	        select(this).call(uiTooltip().title(_t.html('inspector.hidden_preset.' + (isAutoHidden ? 'zoom' : 'manual'), {
+	          features: {
+	            html: _t.html('feature.' + hiddenPresetFeaturesId + '.description')
+	          }
+	        })).placement(index < 2 ? 'bottom' : 'top'));
+	      }
+	    });
+	  }
 
-	        // Header
-	        var header = selection.selectAll('.header')
-	            .data([0]);
+	  presetList.autofocus = function (val) {
+	    if (!arguments.length) return _autofocus;
+	    _autofocus = val;
+	    return presetList;
+	  };
 
-	        // Enter
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'header fillL cf');
+	  presetList.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _currLoc = null;
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'preset-reset preset-choose')
-	            .call(svgIcon((_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-forward' : '#iD-icon-backward'));
+	    if (_entityIDs && _entityIDs.length) {
+	      // calculate current location
+	      var extent = _entityIDs.reduce(function (extent, entityID) {
+	        var entity = context.graph().entity(entityID);
+	        return extent.extend(entity.extent(context.graph()));
+	      }, geoExtent());
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'close')
-	            .on('click', function() { context.enter(modeBrowse(context)); })
-	            .call(svgIcon(_modified ? '#iD-icon-apply' : '#iD-icon-close'));
+	      _currLoc = extent.center(); // match presets
 
-	        headerEnter
-	            .append('h3');
+	      var presets = _entityIDs.map(function (entityID) {
+	        return _mainPresetIndex.match(context.entity(entityID), context.graph());
+	      });
 
-	        // Update
-	        header = header
-	            .merge(headerEnter);
+	      presetList.presets(presets);
+	    }
 
-	        header.selectAll('h3')
-	            .text(_entityIDs.length === 1 ? _t('inspector.edit') : _t('inspector.edit_features'));
+	    return presetList;
+	  };
 
-	        header.selectAll('.preset-reset')
-	            .on('click', function() {
-	                dispatch$1.call('choose', this, _activePresets);
-	            });
+	  presetList.presets = function (val) {
+	    if (!arguments.length) return _currentPresets;
+	    _currentPresets = val;
+	    return presetList;
+	  };
 
-	        // Body
-	        var body = selection.selectAll('.inspector-body')
-	            .data([0]);
+	  function entityGeometries() {
+	    var counts = {};
 
-	        // Enter
-	        var bodyEnter = body.enter()
-	            .append('div')
-	            .attr('class', 'entity-editor inspector-body sep-top');
-
-	        // Update
-	        body = body
-	            .merge(bodyEnter);
-
-	        if (!_sections) {
-	            _sections = [
-	                uiSectionSelectionList(context),
-	                uiSectionFeatureType(context).on('choose', function(presets) {
-	                    dispatch$1.call('choose', this, presets);
-	                }),
-	                uiSectionEntityIssues(context),
-	                uiSectionPresetFields(context).on('change', changeTags).on('revert', revertTags),
-	                uiSectionRawTagEditor('raw-tag-editor', context).on('change', changeTags),
-	                uiSectionRawMemberEditor(context),
-	                uiSectionRawMembershipEditor(context)
-	            ];
-	        }
-
-	        _sections.forEach(function(section) {
-	            if (section.entityIDs) {
-	                section.entityIDs(_entityIDs);
-	            }
-	            if (section.presets) {
-	                section.presets(_activePresets);
-	            }
-	            if (section.tags) {
-	                section.tags(combinedTags);
-	            }
-	            if (section.state) {
-	                section.state(_state);
-	            }
-	            body.call(section.render);
-	        });
+	    for (var i in _entityIDs) {
+	      var entityID = _entityIDs[i];
+	      var entity = context.entity(entityID);
+	      var geometry = entity.geometry(context.graph()); // Treat entities on addr:interpolation lines as points, not vertices (#3241)
 
-	        body
-	            .selectAll('.key-trap-wrap')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'key-trap-wrap')
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', 'key-trap')
-	            .on('keydown.key-trap', function() {
-	                // On tabbing, send focus back to the first field on the inspector-body
-	                // (probably the `name` field) #4159
-	                if (event.keyCode === 9 && !event.shiftKey) {
-	                    event.preventDefault();
-	                    body.select('input').node().focus();
-	                }
-	            });
+	      if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
+	        geometry = 'point';
+	      }
 
-	        context.history()
-	            .on('change.entity-editor', historyChanged);
+	      if (!counts[geometry]) counts[geometry] = 0;
+	      counts[geometry] += 1;
+	    }
 
-	        function historyChanged(difference) {
-	            if (selection.selectAll('.entity-editor').empty()) { return; }
-	            if (_state === 'hide') { return; }
-	            var significant = !difference ||
-	                    difference.didChange.properties ||
-	                    difference.didChange.addition ||
-	                    difference.didChange.deletion;
-	            if (!significant) { return; }
+	    return Object.keys(counts).sort(function (geom1, geom2) {
+	      return counts[geom2] - counts[geom1];
+	    });
+	  }
 
-	            _entityIDs = _entityIDs.filter(context.hasEntity);
-	            if (!_entityIDs.length) { return; }
+	  return utilRebind(presetList, dispatch, 'on');
+	}
 
-	            var priorActivePreset = _activePresets.length === 1 && _activePresets[0];
+	function uiViewOnOSM(context) {
+	  var _what; // an osmEntity or osmNote
 
-	            loadActivePresets();
 
-	            var graph = context.graph();
-	            entityEditor.modified(_base !== graph);
-	            entityEditor(selection);
+	  function viewOnOSM(selection) {
+	    var url;
 
-	            if (priorActivePreset && _activePresets.length === 1 && priorActivePreset !== _activePresets[0]) {
-	                // flash the button to indicate the preset changed
-	                context.container().selectAll('.entity-editor button.preset-reset .label')
-	                    .style('background-color', '#fff')
-	                    .transition()
-	                    .duration(750)
-	                    .style('background-color', null);
-	            }
-	        }
+	    if (_what instanceof osmEntity) {
+	      url = context.connection().entityURL(_what);
+	    } else if (_what instanceof osmNote) {
+	      url = context.connection().noteURL(_what);
 	    }
 
+	    var data = !_what || _what.isNew() ? [] : [_what];
+	    var link = selection.selectAll('.view-on-osm').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	    // Tag changes that fire on input can all get coalesced into a single
-	    // history operation when the user leaves the field.  #2342
-	    // Use explicit entityIDs in case the selection changes before the event is fired.
-	    function changeTags(entityIDs, changed, onInput) {
-
-	        var actions = [];
-	        for (var i in entityIDs) {
-	            var entityID = entityIDs[i];
-	            var entity = context.entity(entityID);
+	    link.exit().remove(); // enter
 
-	            var tags = Object.assign({}, entity.tags);   // shallow copy
-
-	            for (var k in changed) {
-	                if (!k) { continue; }
-	                var v = changed[k];
-	                if (v !== undefined || tags.hasOwnProperty(k)) {
-	                    tags[k] = v;
-	                }
-	            }
+	    var linkEnter = link.enter().append('a').attr('class', 'view-on-osm').attr('target', '_blank').attr('href', url).call(svgIcon('#iD-icon-out-link', 'inline'));
+	    linkEnter.append('span').call(_t.append('inspector.view_on_osm'));
+	  }
 
-	            if (!onInput) {
-	                tags = utilCleanTags(tags);
-	            }
+	  viewOnOSM.what = function (_) {
+	    if (!arguments.length) return _what;
+	    _what = _;
+	    return viewOnOSM;
+	  };
 
-	            if (!fastDeepEqual(entity.tags, tags)) {
-	                actions.push(actionChangeTags(entityID, tags));
-	            }
-	        }
+	  return viewOnOSM;
+	}
 
-	        if (actions.length) {
-	            var combinedAction = function(graph) {
-	                actions.forEach(function(action) {
-	                    graph = action(graph);
-	                });
-	                return graph;
-	            };
+	function uiInspector(context) {
+	  var presetList = uiPresetList(context);
+	  var entityEditor = uiEntityEditor(context);
+	  var wrap = select(null),
+	      presetPane = select(null),
+	      editorPane = select(null);
+	  var _state = 'select';
 
-	            var annotation = _t('operations.change_tags.annotation');
+	  var _entityIDs;
 
-	            if (_coalesceChanges) {
-	                context.overwrite(combinedAction, annotation);
-	            } else {
-	                context.perform(combinedAction, annotation);
-	                _coalesceChanges = !!onInput;
-	            }
-	        }
+	  var _newFeature = false;
 
-	        // if leaving field (blur event), rerun validation
-	        if (!onInput) {
-	            context.validator().validate();
-	        }
-	    }
+	  function inspector(selection) {
+	    presetList.entityIDs(_entityIDs).autofocus(_newFeature).on('choose', inspector.setPreset).on('cancel', function () {
+	      inspector.setPreset();
+	    });
+	    entityEditor.state(_state).entityIDs(_entityIDs).on('choose', inspector.showList);
+	    wrap = selection.selectAll('.panewrap').data([0]);
+	    var enter = wrap.enter().append('div').attr('class', 'panewrap');
+	    enter.append('div').attr('class', 'preset-list-pane pane');
+	    enter.append('div').attr('class', 'entity-editor-pane pane');
+	    wrap = wrap.merge(enter);
+	    presetPane = wrap.selectAll('.preset-list-pane');
+	    editorPane = wrap.selectAll('.entity-editor-pane');
 
-	    function revertTags(keys) {
+	    function shouldDefaultToPresetList() {
+	      // always show the inspector on hover
+	      if (_state !== 'select') return false; // can only change preset on single selection
 
-	        var actions = [];
-	        for (var i in _entityIDs) {
-	            var entityID = _entityIDs[i];
+	      if (_entityIDs.length !== 1) return false;
+	      var entityID = _entityIDs[0];
+	      var entity = context.hasEntity(entityID);
+	      if (!entity) return false; // default to inspector if there are already tags
 
-	            var original = context.graph().base().entities[entityID];
-	            var changed = {};
-	            for (var j in keys) {
-	                var key = keys[j];
-	                changed[key] = original ? original.tags[key] : undefined;
-	            }
+	      if (entity.hasNonGeometryTags()) return false; // prompt to select preset if feature is new and untagged
 
-	            var entity = context.entity(entityID);
-	            var tags = Object.assign({}, entity.tags);   // shallow copy
+	      if (_newFeature) return true; // all existing features except vertices should default to inspector
 
-	            for (var k in changed) {
-	                if (!k) { continue; }
-	                var v = changed[k];
-	                if (v !== undefined || tags.hasOwnProperty(k)) {
-	                    tags[k] = v;
-	                }
-	            }
+	      if (entity.geometry(context.graph()) !== 'vertex') return false; // show vertex relations if any
 
+	      if (context.graph().parentRelations(entity).length) return false; // show vertex issues if there are any
 
-	            tags = utilCleanTags(tags);
+	      if (context.validator().getEntityIssues(entityID).length) return false; // show turn retriction editor for junction vertices
 
-	            if (!fastDeepEqual(entity.tags, tags)) {
-	                actions.push(actionChangeTags(entityID, tags));
-	            }
+	      if (entity.isHighwayIntersection(context.graph())) return false; // otherwise show preset list for uninteresting vertices
 
-	        }
+	      return true;
+	    }
 
-	        if (actions.length) {
-	            var combinedAction = function(graph) {
-	                actions.forEach(function(action) {
-	                    graph = action(graph);
-	                });
-	                return graph;
-	            };
+	    if (shouldDefaultToPresetList()) {
+	      wrap.style('right', '-100%');
+	      editorPane.classed('hide', true);
+	      presetPane.classed('hide', false).call(presetList);
+	    } else {
+	      wrap.style('right', '0%');
+	      presetPane.classed('hide', true);
+	      editorPane.classed('hide', false).call(entityEditor);
+	    }
 
-	            var annotation = _t('operations.change_tags.annotation');
+	    var footer = selection.selectAll('.footer').data([0]);
+	    footer = footer.enter().append('div').attr('class', 'footer').merge(footer);
+	    footer.call(uiViewOnOSM(context).what(context.hasEntity(_entityIDs.length === 1 && _entityIDs[0])));
+	  }
 
-	            if (_coalesceChanges) {
-	                context.overwrite(combinedAction, annotation);
-	            } else {
-	                context.perform(combinedAction, annotation);
-	                _coalesceChanges = false;
-	            }
-	        }
+	  inspector.showList = function (presets) {
+	    presetPane.classed('hide', false);
+	    wrap.transition().styleTween('right', function () {
+	      return interpolate$1('0%', '-100%');
+	    }).on('end', function () {
+	      editorPane.classed('hide', true);
+	    });
 
-	        context.validator().validate();
+	    if (presets) {
+	      presetList.presets(presets);
 	    }
 
+	    presetPane.call(presetList.autofocus(true));
+	  };
 
-	    entityEditor.modified = function(val) {
-	        if (!arguments.length) { return _modified; }
-	        _modified = val;
-	        return entityEditor;
-	    };
+	  inspector.setPreset = function (preset) {
+	    // upon setting multipolygon, go to the area preset list instead of the editor
+	    if (preset && preset.id === 'type/multipolygon') {
+	      presetPane.call(presetList.autofocus(true));
+	    } else {
+	      editorPane.classed('hide', false);
+	      wrap.transition().styleTween('right', function () {
+	        return interpolate$1('-100%', '0%');
+	      }).on('end', function () {
+	        presetPane.classed('hide', true);
+	      });
 
+	      if (preset) {
+	        entityEditor.presets([preset]);
+	      }
 
-	    entityEditor.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return entityEditor;
-	    };
+	      editorPane.call(entityEditor);
+	    }
+	  };
 
+	  inspector.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    entityEditor.state(_state); // remove any old field help overlay that might have gotten attached to the inspector
 
-	    entityEditor.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) { return entityEditor; }  // exit early if no change
+	    context.container().selectAll('.field-help-body').remove();
+	    return inspector;
+	  };
 
-	        _entityIDs = val;
-	        _base = context.graph();
-	        _coalesceChanges = false;
+	  inspector.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return inspector;
+	  };
 
-	        loadActivePresets(true);
+	  inspector.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return inspector;
+	  };
 
-	        return entityEditor
-	            .modified(false);
-	    };
+	  return inspector;
+	}
 
+	function uiKeepRightDetails(context) {
+	  var _qaItem;
 
-	    entityEditor.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        return entityEditor;
+	  function issueDetail(d) {
+	    var itemType = d.itemType,
+	        parentIssueType = d.parentIssueType;
+	    var unknown = {
+	      html: _t.html('inspector.unknown')
 	    };
+	    var replacements = d.replacements || {};
+	    replacements["default"] = unknown; // special key `default` works as a fallback string
+
+	    var detail = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".description"), replacements);
 
+	    if (detail === unknown.html) {
+	      detail = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".description"), replacements);
+	    }
 
-	    function loadActivePresets(isForNewSelection) {
+	    return detail;
+	  }
 
-	        var graph = context.graph();
+	  function keepRightDetails(selection) {
+	    var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    details.exit().remove();
+	    var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
 
-	        var counts = {};
+	    var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	    descriptionEnter.append('h4').call(_t.append('QA.keepRight.detail_description'));
+	    descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..
 
-	        for (var i in _entityIDs) {
-	            var entity = graph.hasEntity(_entityIDs[i]);
-	            if (!entity) { return; }
+	    var relatedEntities = [];
+	    descriptionEnter.selectAll('.error_entity_link, .error_object_link').attr('href', '#').each(function () {
+	      var link = select(this);
+	      var isObjectLink = link.classed('error_object_link');
+	      var entityID = isObjectLink ? utilEntityRoot(_qaItem.objectType) + _qaItem.objectId : this.textContent;
+	      var entity = context.hasEntity(entityID);
+	      relatedEntities.push(entityID); // Add click handler
 
-	            var match = _mainPresetIndex.match(entity, graph);
+	      link.on('mouseenter', function () {
+	        utilHighlightEntities([entityID], true, context);
+	      }).on('mouseleave', function () {
+	        utilHighlightEntities([entityID], false, context);
+	      }).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        utilHighlightEntities([entityID], false, context);
+	        var osmlayer = context.layers().layer('osm');
 
-	            if (!counts[match.id]) { counts[match.id] = 0; }
-	            counts[match.id] += 1;
+	        if (!osmlayer.enabled()) {
+	          osmlayer.enabled(true);
 	        }
 
-	        var matches = Object.keys(counts).sort(function(p1, p2) {
-	            return counts[p2] - counts[p1];
-	        }).map(function(pID) {
-	            return _mainPresetIndex.item(pID);
-	        });
+	        context.map().centerZoomEase(_qaItem.loc, 20);
 
-	        if (!isForNewSelection) {
-	            // A "weak" preset doesn't set any tags. (e.g. "Address")
-	            var weakPreset = _activePresets.length === 1 &&
-	                !_activePresets[0].isFallback() &&
-	                Object.keys(_activePresets[0].addTags || {}).length === 0;
-	            // Don't replace a weak preset with a fallback preset (e.g. "Point")
-	            if (weakPreset && matches.length === 1 && matches[0].isFallback()) { return; }
+	        if (entity) {
+	          context.enter(modeSelect(context, [entityID]));
+	        } else {
+	          context.loadEntity(entityID, function (err, result) {
+	            if (err) return;
+	            var entity = result.data.find(function (e) {
+	              return e.id === entityID;
+	            });
+	            if (entity) context.enter(modeSelect(context, [entityID]));
+	          });
 	        }
+	      }); // Replace with friendly name if possible
+	      // (The entity may not yet be loaded into the graph)
 
-	        entityEditor.presets(matches);
-	    }
+	      if (entity) {
+	        var name = utilDisplayName(entity); // try to use common name
 
-	    entityEditor.presets = function(val) {
-	        if (!arguments.length) { return _activePresets; }
+	        if (!name && !isObjectLink) {
+	          var preset = _mainPresetIndex.match(entity, context.graph());
+	          name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+	        }
 
-	        // don't reload the same preset
-	        if (!utilArrayIdentical(val, _activePresets)) {
-	            _activePresets = val;
+	        if (name) {
+	          this.innerText = name;
 	        }
-	        return entityEditor;
-	    };
+	      }
+	    }); // Don't hide entities related to this issue - #5880
 
-	    return utilRebind(entityEditor, dispatch$1, 'on');
-	}
+	    context.features().forceVisible(relatedEntities);
+	    context.map().pan([0, 0]); // trigger a redraw
+	  }
 
-	function uiPresetList(context) {
-	    var dispatch$1 = dispatch('cancel', 'choose');
-	    var _entityIDs;
-	    var _currentPresets;
-	    var _autofocus = false;
+	  keepRightDetails.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return keepRightDetails;
+	  };
 
+	  return keepRightDetails;
+	}
 
-	    function presetList(selection) {
-	        if (!_entityIDs) { return; }
+	function uiKeepRightHeader() {
+	  var _qaItem;
 
-	        var presets = _mainPresetIndex.matchAllGeometry(entityGeometries());
+	  function issueTitle(d) {
+	    var itemType = d.itemType,
+	        parentIssueType = d.parentIssueType;
+	    var unknown = _t.html('inspector.unknown');
+	    var replacements = d.replacements || {};
+	    replacements["default"] = {
+	      html: unknown
+	    }; // special key `default` works as a fallback string
 
-	        selection.html('');
+	    var title = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);
 
-	        var messagewrap = selection
-	            .append('div')
-	            .attr('class', 'header fillL');
-
-	        var message = messagewrap
-	            .append('h3')
-	            .text(_t('inspector.choose'));
-
-	        messagewrap
-	            .append('button')
-	            .attr('class', 'preset-choose')
-	            .on('click', function() { dispatch$1.call('cancel', this); })
-	            .call(svgIcon((_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-backward' : '#iD-icon-forward'));
-
-	        function initialKeydown() {
-	            // hack to let delete shortcut work when search is autofocused
-	            if (search.property('value').length === 0 &&
-	                (event.keyCode === utilKeybinding.keyCodes['⌫'] ||
-	                 event.keyCode === utilKeybinding.keyCodes['⌦'])) {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                operationDelete(context, _entityIDs)();
-
-	            // hack to let undo work when search is autofocused
-	            } else if (search.property('value').length === 0 &&
-	                (event.ctrlKey || event.metaKey) &&
-	                event.keyCode === utilKeybinding.keyCodes.z) {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                context.undo();
-	            } else if (!event.ctrlKey && !event.metaKey) {
-	                // don't check for delete/undo hack on future keydown events
-	                select(this).on('keydown', keydown);
-	                keydown.call(this);
-	            }
-	        }
+	    if (title !== unknown) {
+	      return _t.apply("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);
+	    } else {
+	      return _t.apply("QA.keepRight.errorTypes.".concat(parentIssueType, ".title"), replacements);
+	    }
+	  }
 
-	        function keydown() {
-	            // down arrow
-	            if (event.keyCode === utilKeybinding.keyCodes['↓'] &&
-	                // if insertion point is at the end of the string
-	                search.node().selectionStart === search.property('value').length) {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                // move focus to the first item in the preset list
-	                var buttons = list.selectAll('.preset-list-button');
-	                if (!buttons.empty()) { buttons.nodes()[0].focus(); }
-	            }
-	        }
+	  function keepRightHeader(selection) {
+	    var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    header.exit().remove();
+	    var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+	    var iconEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+	      return d.id < 0;
+	    });
+	    iconEnter.append('div').attr('class', function (d) {
+	      return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.parentIssueType);
+	    }).call(svgIcon('#iD-icon-bolt', 'qaItem-fill'));
+	    headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
+	  }
 
-	        function keypress() {
-	            // enter
-	            var value = search.property('value');
-	            if (event.keyCode === 13 && value.length) {
-	                list.selectAll('.preset-list-item:first-child')
-	                    .each(function(d) { d.choose.call(this); });
-	            }
-	        }
+	  keepRightHeader.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return keepRightHeader;
+	  };
 
-	        function inputevent() {
-	            var value = search.property('value');
-	            list.classed('filtered', value.length);
-	            var extent = combinedEntityExtent();
-	            var results, messageText;
-	            if (value.length && extent) {
-	                var center = extent.center();
-	                var countryCode = iso1A2Code(center);
+	  return keepRightHeader;
+	}
 
-	                results = presets.search(value, entityGeometries()[0], countryCode && countryCode.toLowerCase());
-	                messageText = _t('inspector.results', {
-	                    n: results.collection.length,
-	                    search: value
-	                });
-	            } else {
-	                results = _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro());
-	                messageText = _t('inspector.choose');
-	            }
-	            list.call(drawList, results);
-	            message.text(messageText);
-	        }
+	function uiViewOnKeepRight() {
+	  var _qaItem;
 
-	        var searchWrap = selection
-	            .append('div')
-	            .attr('class', 'search-header');
+	  function viewOnKeepRight(selection) {
+	    var url;
 
-	        var search = searchWrap
-	            .append('input')
-	            .attr('class', 'preset-search-input')
-	            .attr('placeholder', _t('inspector.search'))
-	            .attr('type', 'search')
-	            .call(utilNoAuto)
-	            .on('keydown', initialKeydown)
-	            .on('keypress', keypress)
-	            .on('input', inputevent);
+	    if (services.keepRight && _qaItem instanceof QAItem) {
+	      url = services.keepRight.issueURL(_qaItem);
+	    }
 
-	        searchWrap
-	            .call(svgIcon('#iD-icon-search', 'pre-text'));
+	    var link = selection.selectAll('.view-on-keepRight').data(url ? [url] : []); // exit
 
-	        if (_autofocus) {
-	            search.node().focus();
-	        }
+	    link.exit().remove(); // enter
 
-	        var listWrap = selection
-	            .append('div')
-	            .attr('class', 'inspector-body');
+	    var linkEnter = link.enter().append('a').attr('class', 'view-on-keepRight').attr('target', '_blank').attr('rel', 'noopener') // security measure
+	    .attr('href', function (d) {
+	      return d;
+	    }).call(svgIcon('#iD-icon-out-link', 'inline'));
+	    linkEnter.append('span').call(_t.append('inspector.view_on_keepRight'));
+	  }
 
-	        var list = listWrap
-	            .append('div')
-	            .attr('class', 'preset-list')
-	            .call(drawList, _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro()));
+	  viewOnKeepRight.what = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return viewOnKeepRight;
+	  };
 
-	        context.features().on('change.preset-list', updateForFeatureHiddenState);
-	    }
+	  return viewOnKeepRight;
+	}
 
+	function uiKeepRightEditor(context) {
+	  var dispatch = dispatch$8('change');
+	  var qaDetails = uiKeepRightDetails(context);
+	  var qaHeader = uiKeepRightHeader();
 
-	    function drawList(list, presets) {
-	        presets = presets.matchAllGeometry(entityGeometries());
-	        var collection = presets.collection.reduce(function(collection, preset) {
-	            if (!preset) { return collection; }
+	  var _qaItem;
 
-	            if (preset.members) {
-	                if (preset.members.collection.filter(function(preset) {
-	                    return preset.addable();
-	                }).length > 1) {
-	                    collection.push(CategoryItem(preset));
-	                }
-	            } else if (preset.addable()) {
-	                collection.push(PresetItem(preset));
-	            }
-	            return collection;
-	        }, []);
+	  function keepRightEditor(selection) {
+	    var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+	      return context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h2').call(_t.append('QA.keepRight.title'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body);
+	    var editor = body.selectAll('.qa-editor').data([0]);
+	    editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(keepRightSaveSection);
+	    var footer = selection.selectAll('.footer').data([0]);
+	    footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnKeepRight().what(_qaItem));
+	  }
 
-	        var items = list.selectAll('.preset-list-item')
-	            .data(collection, function(d) { return d.preset.id; });
+	  function keepRightSaveSection(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	        items.order();
+	    var isShown = _qaItem && (isSelected || _qaItem.newComment || _qaItem.comment);
+	    var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    }); // exit
 
-	        items.exit()
-	            .remove();
+	    saveSection.exit().remove(); // enter
 
-	        items.enter()
-	            .append('div')
-	            .attr('class', function(item) { return 'preset-list-item preset-' + item.preset.id.replace('/', '-'); })
-	            .classed('current', function(item) { return _currentPresets.indexOf(item.preset) !== -1; })
-	            .each(function(item) { select(this).call(item); })
-	            .style('opacity', 0)
-	            .transition()
-	            .style('opacity', 1);
-
-	        updateForFeatureHiddenState();
-	    }
-
-	    function itemKeydown(){
-	        // the actively focused item
-	        var item = select(this.closest('.preset-list-item'));
-	        var parentItem = select(item.node().parentNode.closest('.preset-list-item'));
-
-	        // arrow down, move focus to the next, lower item
-	        if (event.keyCode === utilKeybinding.keyCodes['↓']) {
-	            event.preventDefault();
-	            event.stopPropagation();
-	            // the next item in the list at the same level
-	            var nextItem = select(item.node().nextElementSibling);
-	            // if there is no next item in this list
-	            if (nextItem.empty()) {
-	                // if there is a parent item
-	                if (!parentItem.empty()) {
-	                    // the item is the last item of a sublist,
-	                    // select the next item at the parent level
-	                    nextItem = select(parentItem.node().nextElementSibling);
-	                }
-	            // if the focused item is expanded
-	            } else if (select(this).classed('expanded')) {
-	                // select the first subitem instead
-	                nextItem = item.select('.subgrid .preset-list-item:first-child');
-	            }
-	            if (!nextItem.empty()) {
-	                // focus on the next item
-	                nextItem.select('.preset-list-button').node().focus();
-	            }
+	    var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
+	    saveSectionEnter.append('h4').attr('class', '.qa-save-header').call(_t.append('QA.keepRight.comment'));
+	    saveSectionEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('QA.keepRight.comment_placeholder')).attr('maxlength', 1000).property('value', function (d) {
+	      return d.newComment || d.comment;
+	    }).call(utilNoAuto).on('input', changeInput).on('blur', changeInput); // update
 
-	        // arrow up, move focus to the previous, higher item
-	        } else if (event.keyCode === utilKeybinding.keyCodes['↑']) {
-	            event.preventDefault();
-	            event.stopPropagation();
-	            // the previous item in the list at the same level
-	            var previousItem = select(item.node().previousElementSibling);
-
-	            // if there is no previous item in this list
-	            if (previousItem.empty()) {
-	                // if there is a parent item
-	                if (!parentItem.empty()) {
-	                    // the item is the first subitem of a sublist select the parent item
-	                    previousItem = parentItem;
-	                }
-	            // if the previous item is expanded
-	            } else if (previousItem.select('.preset-list-button').classed('expanded')) {
-	                // select the last subitem of the sublist of the previous item
-	                previousItem = previousItem.select('.subgrid .preset-list-item:last-child');
-	            }
+	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
-	            if (!previousItem.empty()) {
-	                // focus on the previous item
-	                previousItem.select('.preset-list-button').node().focus();
-	            } else {
-	                // the focus is at the top of the list, move focus back to the search field
-	                var search = select(this.closest('.preset-list-pane')).select('.preset-search-input');
-	                search.node().focus();
-	            }
+	    function changeInput() {
+	      var input = select(this);
+	      var val = input.property('value').trim();
 
-	        // arrow left, move focus to the parent item if there is one
-	        } else if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '→' : '←']) {
-	            event.preventDefault();
-	            event.stopPropagation();
-	            // if there is a parent item, focus on the parent item
-	            if (!parentItem.empty()) {
-	                parentItem.select('.preset-list-button').node().focus();
-	            }
+	      if (val === _qaItem.comment) {
+	        val = undefined;
+	      } // store the unsaved comment with the issue itself
 
-	        // arrow right, choose this item
-	        } else if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '←' : '→']) {
-	            event.preventDefault();
-	            event.stopPropagation();
-	            item.datum().choose.call(select(this).node());
-	        }
-	    }
 
+	      _qaItem = _qaItem.update({
+	        newComment: val
+	      });
+	      var qaService = services.keepRight;
 
-	    function CategoryItem(preset) {
-	        var box, sublist, shown = false;
+	      if (qaService) {
+	        qaService.replaceItem(_qaItem); // update keepright cache
+	      }
 
-	        function item(selection) {
-	            var wrap = selection.append('div')
-	                .attr('class', 'preset-list-button-wrap category');
+	      saveSection.call(qaSaveButtons);
+	    }
+	  }
 
-	            function click() {
-	                var isExpanded = select(this).classed('expanded');
-	                var iconName = isExpanded ?
-	                    (_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward') : '#iD-icon-down';
-	                select(this)
-	                    .classed('expanded', !isExpanded);
-	                select(this).selectAll('div.label-inner svg.icon use')
-	                    .attr('href', iconName);
-	                item.choose();
-	            }
+	  function qaSaveButtons(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	            var geometries = entityGeometries();
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	            var button = wrap
-	                .append('button')
-	                .attr('class', 'preset-list-button')
-	                .classed('expanded', false)
-	                .call(uiPresetIcon()
-	                    .geometry(geometries.length === 1 && geometries[0])
-	                    .preset(preset))
-	                .on('click', click)
-	                .on('keydown', function() {
-	                    // right arrow, expand the focused item
-	                    if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '←' : '→']) {
-	                        event.preventDefault();
-	                        event.stopPropagation();
-	                        // if the item isn't expanded
-	                        if (!select(this).classed('expanded')) {
-	                            // toggle expansion (expand the item)
-	                            click.call(this);
-	                        }
-	                    // left arrow, collapse the focused item
-	                    } else if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '→' : '←']) {
-	                        event.preventDefault();
-	                        event.stopPropagation();
-	                        // if the item is expanded
-	                        if (select(this).classed('expanded')) {
-	                            // toggle expansion (collapse the item)
-	                            click.call(this);
-	                        }
-	                    } else {
-	                        itemKeydown.call(this);
-	                    }
-	                });
+	    buttonSection.exit().remove(); // enter
 
-	            var label = button
-	                .append('div')
-	                .attr('class', 'label')
-	                .append('div')
-	                .attr('class', 'label-inner');
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+	    buttonEnter.append('button').attr('class', 'button comment-button action').call(_t.append('QA.keepRight.save_comment'));
+	    buttonEnter.append('button').attr('class', 'button close-button action');
+	    buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
-	            label
-	                .append('div')
-	                .attr('class', 'namepart')
-	                .call(svgIcon((_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'), 'inline'))
-	                .append('span')
-	                .html(function() { return preset.name() + '&hellip;'; });
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.select('.comment-button') // select and propagate data
+	    .attr('disabled', function (d) {
+	      return d.newComment ? null : true;
+	    }).on('click.comment', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	            box = selection.append('div')
-	                .attr('class', 'subgrid')
-	                .style('max-height', '0px')
-	                .style('opacity', 0);
+	      var qaService = services.keepRight;
 
-	            box.append('div')
-	                .attr('class', 'arrow');
+	      if (qaService) {
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
+	    });
+	    buttonSection.select('.close-button') // select and propagate data
+	    .html(function (d) {
+	      var andComment = d.newComment ? '_comment' : '';
+	      return _t.html("QA.keepRight.close".concat(andComment));
+	    }).on('click.close', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	            sublist = box.append('div')
-	                .attr('class', 'preset-list fillL3');
-	        }
+	      var qaService = services.keepRight;
 
+	      if (qaService) {
+	        d.newStatus = 'ignore_t'; // ignore temporarily (item fixed)
 
-	        item.choose = function() {
-	            if (!box || !sublist) { return; }
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
+	    });
+	    buttonSection.select('.ignore-button') // select and propagate data
+	    .html(function (d) {
+	      var andComment = d.newComment ? '_comment' : '';
+	      return _t.html("QA.keepRight.ignore".concat(andComment));
+	    }).on('click.ignore', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	            if (shown) {
-	                shown = false;
-	                box.transition()
-	                    .duration(200)
-	                    .style('opacity', '0')
-	                    .style('max-height', '0px')
-	                    .style('padding-bottom', '0px');
-	            } else {
-	                shown = true;
-	                var members = preset.members.matchAllGeometry(entityGeometries());
-	                sublist.call(drawList, members);
-	                box.transition()
-	                    .duration(200)
-	                    .style('opacity', '1')
-	                    .style('max-height', 200 + members.collection.length * 190 + 'px')
-	                    .style('padding-bottom', '10px');
-	            }
-	        };
+	      var qaService = services.keepRight;
 
-	        item.preset = preset;
-	        return item;
-	    }
+	      if (qaService) {
+	        d.newStatus = 'ignore'; // ignore permanently (false positive)
 
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
+	    });
+	  } // NOTE: Don't change method name until UI v3 is merged
 
-	    function PresetItem(preset) {
-	        function item(selection) {
-	            var wrap = selection.append('div')
-	                .attr('class', 'preset-list-button-wrap');
 
-	            var geometries = entityGeometries();
+	  keepRightEditor.error = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return keepRightEditor;
+	  };
 
-	            var button = wrap.append('button')
-	                .attr('class', 'preset-list-button')
-	                .call(uiPresetIcon()
-	                    .geometry(geometries.length === 1 && geometries[0])
-	                    .preset(preset))
-	                .on('click', item.choose)
-	                .on('keydown', itemKeydown);
+	  return utilRebind(keepRightEditor, dispatch, 'on');
+	}
 
-	            var label = button
-	                .append('div')
-	                .attr('class', 'label')
-	                .append('div')
-	                .attr('class', 'label-inner');
+	function uiLasso(context) {
+	  var group, polygon;
+	  lasso.coordinates = [];
 
-	            // NOTE: split/join on en-dash, not a hypen (to avoid conflict with fr - nl names in Brussels etc)
-	            label.selectAll('.namepart')
-	                .data(preset.name().split(' – '))
-	                .enter()
-	                .append('div')
-	                .attr('class', 'namepart')
-	                .text(function(d) { return d; });
+	  function lasso(selection) {
+	    context.container().classed('lasso', true);
+	    group = selection.append('g').attr('class', 'lasso hide');
+	    polygon = group.append('path').attr('class', 'lasso-path');
+	    group.call(uiToggle(true));
+	  }
 
-	            wrap.call(item.reference.button);
-	            selection.call(item.reference.body);
-	        }
+	  function draw() {
+	    if (polygon) {
+	      polygon.data([lasso.coordinates]).attr('d', function (d) {
+	        return 'M' + d.join(' L') + ' Z';
+	      });
+	    }
+	  }
 
-	        item.choose = function() {
-	            if (select(this).classed('disabled')) { return; }
-	            if (!context.inIntro()) {
-	                _mainPresetIndex.setMostRecent(preset, entityGeometries()[0]);
-	            }
-	            context.perform(
-	                function(graph) {
-	                    for (var i in _entityIDs) {
-	                        var entityID = _entityIDs[i];
-	                        var oldPreset = _mainPresetIndex.match(graph.entity(entityID), graph);
-	                        graph = actionChangePreset(entityID, oldPreset, preset)(graph);
-	                    }
-	                    return graph;
-	                },
-	                _t('operations.change_tags.annotation')
-	            );
+	  lasso.extent = function () {
+	    return lasso.coordinates.reduce(function (extent, point) {
+	      return extent.extend(geoExtent(point));
+	    }, geoExtent());
+	  };
 
-	            context.validator().validate();  // rerun validation
-	            dispatch$1.call('choose', this, preset);
-	        };
+	  lasso.p = function (_) {
+	    if (!arguments.length) return lasso;
+	    lasso.coordinates.push(_);
+	    draw();
+	    return lasso;
+	  };
 
-	        item.help = function() {
-	            event.stopPropagation();
-	            item.reference.toggle();
-	        };
+	  lasso.close = function () {
+	    if (group) {
+	      group.call(uiToggle(false, function () {
+	        select(this).remove();
+	      }));
+	    }
 
-	        item.preset = preset;
-	        item.reference = uiTagReference(preset.reference(entityGeometries()[0]));
+	    context.container().classed('lasso', false);
+	  };
 
-	        return item;
-	    }
+	  return lasso;
+	}
 
+	function uiNoteComments() {
+	  var _note;
+
+	  function noteComments(selection) {
+	    if (_note.isNew()) return; // don't draw .comments-container
+
+	    var comments = selection.selectAll('.comments-container').data([0]);
+	    comments = comments.enter().append('div').attr('class', 'comments-container').merge(comments);
+	    var commentEnter = comments.selectAll('.comment').data(_note.comments).enter().append('div').attr('class', 'comment');
+	    commentEnter.append('div').attr('class', function (d) {
+	      return 'comment-avatar user-' + d.uid;
+	    }).call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
+	    var mainEnter = commentEnter.append('div').attr('class', 'comment-main');
+	    var metadataEnter = mainEnter.append('div').attr('class', 'comment-metadata');
+	    metadataEnter.append('div').attr('class', 'comment-author').each(function (d) {
+	      var selection = select(this);
+	      var osm = services.osm;
 
-	    function updateForFeatureHiddenState() {
-	        if (!_entityIDs.every(context.hasEntity)) { return; }
+	      if (osm && d.user) {
+	        selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.user)).attr('target', '_blank');
+	      }
 
-	        var geometries = entityGeometries();
-	        var button = context.container().selectAll('.preset-list .preset-list-button');
+	      if (d.user) {
+	        selection.text(d.user);
+	      } else {
+	        selection.call(_t.append('note.anonymous'));
+	      }
+	    });
+	    metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
+	      return _t.html('note.status.' + d.action, {
+	        when: localeDateString(d.date)
+	      });
+	    });
+	    mainEnter.append('div').attr('class', 'comment-text').html(function (d) {
+	      return d.html;
+	    }).selectAll('a').attr('rel', 'noopener nofollow').attr('target', '_blank');
+	    comments.call(replaceAvatars);
+	  }
 
-	        // remove existing tooltips
-	        button.call(uiTooltip().destroyAny);
+	  function replaceAvatars(selection) {
+	    var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+	    var osm = services.osm;
+	    if (showThirdPartyIcons !== 'true' || !osm) return;
+	    var uids = {}; // gather uids in the comment thread
 
-	        button.each(function(item, index) {
-	            var hiddenPresetFeaturesId;
-	            for (var i in geometries) {
-	                hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
-	                if (hiddenPresetFeaturesId) { break; }
-	            }
-	            var isHiddenPreset = !context.inIntro() &&
-	                !!hiddenPresetFeaturesId &&
-	                (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
-
-	            select(this)
-	                .classed('disabled', isHiddenPreset);
-
-	            if (isHiddenPreset) {
-	                var isAutoHidden = context.features().autoHidden(hiddenPresetFeaturesId);
-	                var tooltipIdSuffix = isAutoHidden ? 'zoom' : 'manual';
-	                var tooltipObj = { features: _t('feature.' + hiddenPresetFeaturesId + '.description') };
-	                select(this).call(uiTooltip()
-	                    .title(_t('inspector.hidden_preset.' + tooltipIdSuffix, tooltipObj))
-	                    .placement(index < 2 ? 'bottom' : 'top')
-	                );
-	            }
-	        });
-	    }
+	    _note.comments.forEach(function (d) {
+	      if (d.uid) uids[d.uid] = true;
+	    });
 
-	    presetList.autofocus = function(val) {
-	        if (!arguments.length) { return _autofocus; }
-	        _autofocus = val;
-	        return presetList;
-	    };
+	    Object.keys(uids).forEach(function (uid) {
+	      osm.loadUser(uid, function (err, user) {
+	        if (!user || !user.image_url) return;
+	        selection.selectAll('.comment-avatar.user-' + uid).html('').append('img').attr('class', 'icon comment-avatar-icon').attr('src', user.image_url).attr('alt', user.display_name);
+	      });
+	    });
+	  }
 
-	    presetList.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        if (_entityIDs && _entityIDs.length) {
-	            var presets = _entityIDs.map(function(entityID) {
-	                return _mainPresetIndex.match(context.entity(entityID), context.graph());
-	            });
-	            presetList.presets(presets);
-	        }
-	        return presetList;
+	  function localeDateString(s) {
+	    if (!s) return null;
+	    var options = {
+	      day: 'numeric',
+	      month: 'short',
+	      year: 'numeric'
 	    };
+	    s = s.replace(/-/g, '/'); // fix browser-specific Date() issues
 
-	    presetList.presets = function(val) {
-	        if (!arguments.length) { return _currentPresets; }
-	        _currentPresets = val;
-	        return presetList;
-	    };
+	    var d = new Date(s);
+	    if (isNaN(d.getTime())) return null;
+	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	  }
 
-	    function entityGeometries() {
+	  noteComments.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteComments;
+	  };
 
-	        var counts = {};
+	  return noteComments;
+	}
 
-	        for (var i in _entityIDs) {
-	            var entityID = _entityIDs[i];
-	            var entity = context.entity(entityID);
-	            var geometry = entity.geometry(context.graph());
+	function uiNoteHeader() {
+	  var _note;
 
-	            // Treat entities on addr:interpolation lines as points, not vertices (#3241)
-	            if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
-	                geometry = 'point';
-	            }
+	  function noteHeader(selection) {
+	    var header = selection.selectAll('.note-header').data(_note ? [_note] : [], function (d) {
+	      return d.status + d.id;
+	    });
+	    header.exit().remove();
+	    var headerEnter = header.enter().append('div').attr('class', 'note-header');
+	    var iconEnter = headerEnter.append('div').attr('class', function (d) {
+	      return 'note-header-icon ' + d.status;
+	    }).classed('new', function (d) {
+	      return d.id < 0;
+	    });
+	    iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-note', 'note-fill'));
+	    iconEnter.each(function (d) {
+	      var statusIcon;
+
+	      if (d.id < 0) {
+	        statusIcon = '#iD-icon-plus';
+	      } else if (d.status === 'open') {
+	        statusIcon = '#iD-icon-close';
+	      } else {
+	        statusIcon = '#iD-icon-apply';
+	      }
 
-	            if (!counts[geometry]) { counts[geometry] = 0; }
-	            counts[geometry] += 1;
-	        }
+	      iconEnter.append('div').attr('class', 'note-icon-annotation').attr('title', _t('icons.close')).call(svgIcon(statusIcon, 'icon-annotation'));
+	    });
+	    headerEnter.append('div').attr('class', 'note-header-label').html(function (d) {
+	      if (_note.isNew()) {
+	        return _t.html('note.new');
+	      }
 
-	        return Object.keys(counts).sort(function(geom1, geom2) {
-	            return counts[geom2] - counts[geom1];
-	        });
-	    }
+	      return _t.html('note.note') + ' ' + d.id + ' ' + (d.status === 'closed' ? _t.html('note.closed') : '');
+	    });
+	  }
 
-	    function combinedEntityExtent() {
-	        return _entityIDs.reduce(function(extent, entityID) {
-	            var entity = context.graph().entity(entityID);
-	            return extent.extend(entity.extent(context.graph()));
-	        }, geoExtent());
-	    }
+	  noteHeader.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteHeader;
+	  };
 
-	    return utilRebind(presetList, dispatch$1, 'on');
+	  return noteHeader;
 	}
 
-	function uiInspector(context) {
-	    var presetList = uiPresetList(context);
-	    var entityEditor = uiEntityEditor(context);
-	    var wrap = select(null),
-	        presetPane = select(null),
-	        editorPane = select(null);
-	    var _state = 'select';
-	    var _entityIDs;
-	    var _newFeature = false;
-
-
-	    function inspector(selection) {
-	        presetList
-	            .entityIDs(_entityIDs)
-	            .autofocus(_newFeature)
-	            .on('choose', inspector.setPreset)
-	            .on('cancel', function() {
-	                wrap.transition()
-	                    .styleTween('right', function() { return interpolate('-100%', '0%'); });
-	                editorPane.call(entityEditor);
-	            });
+	function uiNoteReport() {
+	  var _note;
 
-	        entityEditor
-	            .state(_state)
-	            .entityIDs(_entityIDs)
-	            .on('choose', inspector.showList);
+	  function noteReport(selection) {
+	    var url;
 
-	        wrap = selection.selectAll('.panewrap')
-	            .data([0]);
+	    if (services.osm && _note instanceof osmNote && !_note.isNew()) {
+	      url = services.osm.noteReportURL(_note);
+	    }
 
-	        var enter = wrap.enter()
-	            .append('div')
-	            .attr('class', 'panewrap');
+	    var link = selection.selectAll('.note-report').data(url ? [url] : []); // exit
 
-	        enter
-	            .append('div')
-	            .attr('class', 'preset-list-pane pane');
+	    link.exit().remove(); // enter
 
-	        enter
-	            .append('div')
-	            .attr('class', 'entity-editor-pane pane');
+	    var linkEnter = link.enter().append('a').attr('class', 'note-report').attr('target', '_blank').attr('href', function (d) {
+	      return d;
+	    }).call(svgIcon('#iD-icon-out-link', 'inline'));
+	    linkEnter.append('span').call(_t.append('note.report'));
+	  }
+
+	  noteReport.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteReport;
+	  };
 
-	        wrap = wrap.merge(enter);
-	        presetPane = wrap.selectAll('.preset-list-pane');
-	        editorPane = wrap.selectAll('.entity-editor-pane');
+	  return noteReport;
+	}
 
-	        function shouldDefaultToPresetList() {
-	            // always show the inspector on hover
-	            if (_state !== 'select') { return false; }
+	function uiNoteEditor(context) {
+	  var dispatch = dispatch$8('change');
+	  var noteComments = uiNoteComments();
+	  var noteHeader = uiNoteHeader(); // var formFields = uiFormFields(context);
 
-	            // can only change preset on single selection
-	            if (_entityIDs.length !== 1) { return false; }
+	  var _note;
 
-	            var entityID = _entityIDs[0];
-	            var entity = context.hasEntity(entityID);
-	            if (!entity) { return false; }
+	  var _newNote; // var _fieldsArr;
 
-	            // default to inspector if there are already tags
-	            if (entity.hasNonGeometryTags()) { return false; }
 
-	            // prompt to select preset if feature is new and untagged
-	            if (_newFeature) { return true; }
+	  function noteEditor(selection) {
+	    var header = selection.selectAll('.header').data([0]);
+	    var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+	      context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h2').call(_t.append('note.title'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body);
+	    var editor = body.selectAll('.note-editor').data([0]);
+	    editor.enter().append('div').attr('class', 'modal-section note-editor').merge(editor).call(noteHeader.note(_note)).call(noteComments.note(_note)).call(noteSaveSection);
+	    var footer = selection.selectAll('.footer').data([0]);
+	    footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnOSM(context).what(_note)).call(uiNoteReport().note(_note)); // rerender the note editor on any auth change
+
+	    var osm = services.osm;
+
+	    if (osm) {
+	      osm.on('change.note-save', function () {
+	        selection.call(noteEditor);
+	      });
+	    }
+	  }
 
-	            // all existing features except vertices should default to inspector
-	            if (entity.geometry(context.graph()) !== 'vertex') { return false; }
+	  function noteSaveSection(selection) {
+	    var isSelected = _note && _note.id === context.selectedNoteID();
 
-	            // show vertex relations if any
-	            if (context.graph().parentRelations(entity).length) { return false; }
+	    var noteSave = selection.selectAll('.note-save').data(isSelected ? [_note] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	            // show vertex issues if there are any
-	            if (context.validator().getEntityIssues(entityID).length) { return false; }
+	    noteSave.exit().remove(); // enter
 
-	            // show turn retriction editor for junction vertices
-	            if (entity.isHighwayIntersection(context.graph())) { return false; }
+	    var noteSaveEnter = noteSave.enter().append('div').attr('class', 'note-save save-section cf'); // // if new note, show categories to pick from
+	    // if (_note.isNew()) {
+	    //     var presets = presetManager;
+	    //     // NOTE: this key isn't a age and therefore there is no documentation (yet)
+	    //     _fieldsArr = [
+	    //         uiField(context, presets.field('category'), null, { show: true, revert: false }),
+	    //     ];
+	    //     _fieldsArr.forEach(function(field) {
+	    //         field
+	    //             .on('change', changeCategory);
+	    //     });
+	    //     noteSaveEnter
+	    //         .append('div')
+	    //         .attr('class', 'note-category')
+	    //         .call(formFields.fieldsArr(_fieldsArr));
+	    // }
+	    // function changeCategory() {
+	    //     // NOTE: perhaps there is a better way to get value
+	    //     var val = context.container().select('input[name=\'category\']:checked').property('__data__') || undefined;
+	    //     // store the unsaved category with the note itself
+	    //     _note = _note.update({ newCategory: val });
+	    //     var osm = services.osm;
+	    //     if (osm) {
+	    //         osm.replaceNote(_note);  // update note cache
+	    //     }
+	    //     noteSave
+	    //         .call(noteSaveButtons);
+	    // }
 
-	            // otherwise show preset list for uninteresting vertices
-	            return true;
-	        }
+	    noteSaveEnter.append('h4').attr('class', '.note-save-header').html(function () {
+	      return _note.isNew() ? _t.html('note.newDescription') : _t.html('note.newComment');
+	    });
+	    var commentTextarea = noteSaveEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('note.inputPlaceholder')).attr('maxlength', 1000).property('value', function (d) {
+	      return d.newComment;
+	    }).call(utilNoAuto).on('keydown.note-input', keydown).on('input.note-input', changeInput).on('blur.note-input', changeInput);
 
-	        if (shouldDefaultToPresetList()) {
-	            wrap.style('right', '-100%');
-	            presetPane.call(presetList);
-	        } else {
-	            wrap.style('right', '0%');
-	            editorPane.call(entityEditor);
-	        }
+	    if (!commentTextarea.empty() && _newNote) {
+	      // autofocus the comment field for new notes
+	      commentTextarea.node().focus();
+	    } // update
 
-	        var footer = selection.selectAll('.footer')
-	            .data([0]);
 
-	        footer = footer.enter()
-	            .append('div')
-	            .attr('class', 'footer')
-	            .merge(footer);
+	    noteSave = noteSaveEnter.merge(noteSave).call(userDetails).call(noteSaveButtons); // fast submit if user presses cmd+enter
 
-	        footer
-	            .call(uiViewOnOSM(context)
-	                .what(context.hasEntity(_entityIDs.length === 1 && _entityIDs[0]))
-	            );
+	    function keydown(d3_event) {
+	      if (!(d3_event.keyCode === 13 && // ↩ Return
+	      d3_event.metaKey)) return;
+	      var osm = services.osm;
+	      if (!osm) return;
+	      var hasAuth = osm.authenticated();
+	      if (!hasAuth) return;
+	      if (!_note.newComment) return;
+	      d3_event.preventDefault();
+	      select(this).on('keydown.note-input', null); // focus on button and submit
+
+	      window.setTimeout(function () {
+	        if (_note.isNew()) {
+	          noteSave.selectAll('.save-button').node().focus();
+	          clickSave();
+	        } else {
+	          noteSave.selectAll('.comment-button').node().focus();
+	          clickComment();
+	        }
+	      }, 10);
 	    }
 
-	    inspector.showList = function(presets) {
-
-	        wrap.transition()
-	            .styleTween('right', function() { return interpolate('0%', '-100%'); });
+	    function changeInput() {
+	      var input = select(this);
+	      var val = input.property('value').trim() || undefined; // store the unsaved comment with the note itself
 
-	        if (presets) {
-	            presetList.presets(presets);
-	        }
+	      _note = _note.update({
+	        newComment: val
+	      });
+	      var osm = services.osm;
 
-	        presetPane
-	            .call(presetList.autofocus(true));
-	    };
+	      if (osm) {
+	        osm.replaceNote(_note); // update note cache
+	      }
 
-	    inspector.setPreset = function(preset) {
+	      noteSave.call(noteSaveButtons);
+	    }
+	  }
 
-	        // upon setting multipolygon, go to the area preset list instead of the editor
-	        if (preset.id === 'type/multipolygon') {
-	            presetPane
-	                .call(presetList.autofocus(true));
+	  function userDetails(selection) {
+	    var detailSection = selection.selectAll('.detail-section').data([0]);
+	    detailSection = detailSection.enter().append('div').attr('class', 'detail-section').merge(detailSection);
+	    var osm = services.osm;
+	    if (!osm) return; // Add warning if user is not logged in
 
-	        } else {
-	            wrap.transition()
-	                .styleTween('right', function() { return interpolate('-100%', '0%'); });
+	    var hasAuth = osm.authenticated();
+	    var authWarning = detailSection.selectAll('.auth-warning').data(hasAuth ? [] : [0]);
+	    authWarning.exit().transition().duration(200).style('opacity', 0).remove();
+	    var authEnter = authWarning.enter().insert('div', '.tag-reference-body').attr('class', 'field-warning auth-warning').style('opacity', 0);
+	    authEnter.call(svgIcon('#iD-icon-alert', 'inline'));
+	    authEnter.append('span').call(_t.append('note.login'));
+	    authEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).append('span').call(_t.append('login')).on('click.note-login', function (d3_event) {
+	      d3_event.preventDefault();
+	      osm.authenticate();
+	    });
+	    authEnter.transition().duration(200).style('opacity', 1);
+	    var prose = detailSection.selectAll('.note-save-prose').data(hasAuth ? [0] : []);
+	    prose.exit().remove();
+	    prose = prose.enter().append('p').attr('class', 'note-save-prose').call(_t.append('note.upload_explanation')).merge(prose);
+	    osm.userDetails(function (err, user) {
+	      if (err) return;
+	      var userLink = select(document.createElement('div'));
+
+	      if (user.image_url) {
+	        userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+	      }
 
-	            editorPane
-	                .call(entityEditor.presets([preset]));
+	      userLink.append('a').attr('class', 'user-info').text(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
+	      prose.html(_t.html('note.upload_explanation_with_user', {
+	        user: {
+	          html: userLink.html()
 	        }
+	      }));
+	    });
+	  }
 
-	    };
+	  function noteSaveButtons(selection) {
+	    var osm = services.osm;
+	    var hasAuth = osm && osm.authenticated();
 
-	    inspector.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        entityEditor.state(_state);
+	    var isSelected = _note && _note.id === context.selectedNoteID();
 
-	        // remove any old field help overlay that might have gotten attached to the inspector
-	        context.container().selectAll('.field-help-body').remove();
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_note] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	        return inspector;
-	    };
+	    buttonSection.exit().remove(); // enter
 
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
 
-	    inspector.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return inspector;
-	    };
+	    if (_note.isNew()) {
+	      buttonEnter.append('button').attr('class', 'button cancel-button secondary-action').call(_t.append('confirm.cancel'));
+	      buttonEnter.append('button').attr('class', 'button save-button action').call(_t.append('note.save'));
+	    } else {
+	      buttonEnter.append('button').attr('class', 'button status-button action');
+	      buttonEnter.append('button').attr('class', 'button comment-button action').call(_t.append('note.comment'));
+	    } // update
 
 
-	    inspector.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        return inspector;
-	    };
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.select('.cancel-button') // select and propagate data
+	    .on('click.cancel', clickCancel);
+	    buttonSection.select('.save-button') // select and propagate data
+	    .attr('disabled', isSaveDisabled).on('click.save', clickSave);
+	    buttonSection.select('.status-button') // select and propagate data
+	    .attr('disabled', hasAuth ? null : true).html(function (d) {
+	      var action = d.status === 'open' ? 'close' : 'open';
+	      var andComment = d.newComment ? '_comment' : '';
+	      return _t.html('note.' + action + andComment);
+	    }).on('click.status', clickStatus);
+	    buttonSection.select('.comment-button') // select and propagate data
+	    .attr('disabled', isSaveDisabled).on('click.comment', clickComment);
 
+	    function isSaveDisabled(d) {
+	      return hasAuth && d.status === 'open' && d.newComment ? null : true;
+	    }
+	  }
 
-	    return inspector;
-	}
+	  function clickCancel(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	function uiSidebar(context) {
-	    var inspector = uiInspector(context);
-	    var dataEditor = uiDataEditor(context);
-	    var noteEditor = uiNoteEditor(context);
-	    var improveOsmEditor = uiImproveOsmEditor(context);
-	    var keepRightEditor = uiKeepRightEditor(context);
-	    var osmoseEditor = uiOsmoseEditor(context);
-	    var _current;
-	    var _wasData = false;
-	    var _wasNote = false;
-	    var _wasQaItem = false;
-
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-
-	    function sidebar(selection) {
-	        var container = context.container();
-	        var minWidth = 240;
-	        var sidebarWidth;
-	        var containerWidth;
-	        var dragOffset;
-
-	        // Set the initial width constraints
-	        selection
-	            .style('min-width', minWidth + 'px')
-	            .style('max-width', '400px')
-	            .style('width', '33.3333%');
-
-	        var resizer = selection
-	            .append('div')
-	            .attr('class', 'sidebar-resizer')
-	            .on(_pointerPrefix + 'down.sidebar-resizer', pointerdown);
+	    var osm = services.osm;
+
+	    if (osm) {
+	      osm.removeNote(d);
+	    }
 
-	        var downPointerId, lastClientX, containerLocGetter;
+	    context.enter(modeBrowse(context));
+	    dispatch.call('change');
+	  }
 
-	        function pointerdown() {
-	            if (downPointerId) { return; }
+	  function clickSave(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	            if ('button' in event && event.button !== 0) { return; }
+	    var osm = services.osm;
 
-	            downPointerId = event.pointerId || 'mouse';
+	    if (osm) {
+	      osm.postNoteCreate(d, function (err, note) {
+	        dispatch.call('change', note);
+	      });
+	    }
+	  }
 
-	            lastClientX = event.clientX;
+	  function clickStatus(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	            containerLocGetter = utilFastMouse(container.node());
+	    var osm = services.osm;
 
-	            // offset from edge of sidebar-resizer
-	            dragOffset = utilFastMouse(resizer.node())(event)[0] - 1;
+	    if (osm) {
+	      var setStatus = d.status === 'open' ? 'closed' : 'open';
+	      osm.postNoteUpdate(d, setStatus, function (err, note) {
+	        dispatch.call('change', note);
+	      });
+	    }
+	  }
 
-	            sidebarWidth = selection.node().getBoundingClientRect().width;
-	            containerWidth = container.node().getBoundingClientRect().width;
-	            var widthPct = (sidebarWidth / containerWidth) * 100;
-	            selection
-	                .style('width', widthPct + '%')    // lock in current width
-	                .style('max-width', '85%');        // but allow larger widths
+	  function clickComment(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	            resizer.classed('dragging', true);
+	    var osm = services.osm;
 
-	            select(window)
-	                .on('touchmove.sidebar-resizer', function() {
-	                    // disable page scrolling while resizing on touch input
-	                    event.preventDefault();
-	                }, { passive: false })
-	                .on(_pointerPrefix + 'move.sidebar-resizer', pointermove)
-	                .on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', pointerup);
-	        }
+	    if (osm) {
+	      osm.postNoteUpdate(d, d.status, function (err, note) {
+	        dispatch.call('change', note);
+	      });
+	    }
+	  }
 
-	        function pointermove() {
+	  noteEditor.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteEditor;
+	  };
 
-	            if (downPointerId !== (event.pointerId || 'mouse')) { return; }
+	  noteEditor.newNote = function (val) {
+	    if (!arguments.length) return _newNote;
+	    _newNote = val;
+	    return noteEditor;
+	  };
 
-	            event.preventDefault();
+	  return utilRebind(noteEditor, dispatch, 'on');
+	}
 
-	            var dx = event.clientX - lastClientX;
+	function uiSourceSwitch(context) {
+	  var keys;
 
-	            lastClientX = event.clientX;
+	  function click(d3_event) {
+	    d3_event.preventDefault();
+	    var osm = context.connection();
+	    if (!osm) return;
+	    if (context.inIntro()) return;
+	    if (context.history().hasChanges() && !window.confirm(_t('source_switch.lose_changes'))) return;
+	    var isLive = select(this).classed('live');
+	    isLive = !isLive;
+	    context.enter(modeBrowse(context));
+	    context.history().clearSaved(); // remove saved history
 
-	            var isRTL = (_mainLocalizer.textDirection() === 'rtl');
-	            var scaleX = isRTL ? 0 : 1;
-	            var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+	    context.flush(); // remove stored data
 
-	            var x = containerLocGetter(event)[0] - dragOffset;
-	            sidebarWidth = isRTL ? containerWidth - x : x;
+	    select(this).html(isLive ? _t.html('source_switch.live') : _t.html('source_switch.dev')).classed('live', isLive).classed('chip', isLive);
+	    osm["switch"](isLive ? keys[0] : keys[1]); // switch connection (warning: dispatches 'change' event)
+	  }
 
-	            var isCollapsed = selection.classed('collapsed');
-	            var shouldCollapse = sidebarWidth < minWidth;
+	  var sourceSwitch = function sourceSwitch(selection) {
+	    selection.append('a').attr('href', '#').call(_t.append('source_switch.live')).attr('class', 'live chip').on('click', click);
+	  };
 
-	            selection.classed('collapsed', shouldCollapse);
+	  sourceSwitch.keys = function (_) {
+	    if (!arguments.length) return keys;
+	    keys = _;
+	    return sourceSwitch;
+	  };
 
-	            if (shouldCollapse) {
-	                if (!isCollapsed) {
-	                    selection
-	                        .style(xMarginProperty, '-400px')
-	                        .style('width', '400px');
+	  return sourceSwitch;
+	}
 
-	                    context.ui().onResize([(sidebarWidth - dx) * scaleX, 0]);
-	                }
+	function uiSpinner(context) {
+	  var osm = context.connection();
+	  return function (selection) {
+	    var img = selection.append('img').attr('src', context.imagePath('loader-black.gif')).style('opacity', 0);
 
-	            } else {
-	                var widthPct = (sidebarWidth / containerWidth) * 100;
-	                selection
-	                    .style(xMarginProperty, null)
-	                    .style('width', widthPct + '%');
+	    if (osm) {
+	      osm.on('loading.spinner', function () {
+	        img.transition().style('opacity', 1);
+	      }).on('loaded.spinner', function () {
+	        img.transition().style('opacity', 0);
+	      });
+	    }
+	  };
+	}
 
-	                if (isCollapsed) {
-	                    context.ui().onResize([-sidebarWidth * scaleX, 0]);
-	                } else {
-	                    context.ui().onResize([-dx * scaleX, 0]);
-	                }
-	            }
-	        }
+	function uiSectionPrivacy(context) {
+	  var section = uiSection('preferences-third-party', context).label(_t.html('preferences.privacy.title')).disclosureContent(renderDisclosureContent);
 
-	        function pointerup() {
-	            if (downPointerId !== (event.pointerId || 'mouse')) { return; }
+	  function renderDisclosureContent(selection) {
+	    // enter
+	    selection.selectAll('.privacy-options-list').data([0]).enter().append('ul').attr('class', 'layer-list privacy-options-list');
+	    var thirdPartyIconsEnter = selection.select('.privacy-options-list').selectAll('.privacy-third-party-icons-item').data([corePreferences('preferences.privacy.thirdpartyicons') || 'true']).enter().append('li').attr('class', 'privacy-third-party-icons-item').append('label').call(uiTooltip().title(_t.html('preferences.privacy.third_party_icons.tooltip')).placement('bottom'));
+	    thirdPartyIconsEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+	      d3_event.preventDefault();
+	      corePreferences('preferences.privacy.thirdpartyicons', d === 'true' ? 'false' : 'true');
+	    });
+	    thirdPartyIconsEnter.append('span').call(_t.append('preferences.privacy.third_party_icons.description')); // update
 
-	            downPointerId = null;
+	    selection.selectAll('.privacy-third-party-icons-item').classed('active', function (d) {
+	      return d === 'true';
+	    }).select('input').property('checked', function (d) {
+	      return d === 'true';
+	    }); // Privacy Policy link
 
-	            resizer.classed('dragging', false);
+	    selection.selectAll('.privacy-link').data([0]).enter().append('div').attr('class', 'privacy-link').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/openstreetmap/iD/blob/release/PRIVACY.md').append('span').call(_t.append('preferences.privacy.privacy_link'));
+	  }
 
-	            select(window)
-	                .on('touchmove.sidebar-resizer', null)
-	                .on(_pointerPrefix + 'move.sidebar-resizer', null)
-	                .on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', null);
-	        }
+	  corePreferences.onChange('preferences.privacy.thirdpartyicons', section.reRender);
+	  return section;
+	}
 
-	        var featureListWrap = selection
-	            .append('div')
-	            .attr('class', 'feature-list-pane')
-	            .call(uiFeatureList(context));
+	function uiSplash(context) {
+	  return function (selection) {
+	    // Exception - if there are restorable changes, skip this splash screen.
+	    // This is because we currently only support one `uiModal` at a time
+	    //  and we need to show them `uiRestore`` instead of this one.
+	    if (context.history().hasRestorableChanges()) return; // If user has not seen this version of the privacy policy, show the splash again.
 
-	        var inspectorWrap = selection
-	            .append('div')
-	            .attr('class', 'inspector-hidden inspector-wrap');
+	    var updateMessage = '';
+	    var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
+	    var showSplash = !corePreferences('sawSplash');
 
-	        var hoverModeSelect = function(targets) {
-	            context.container().selectAll('.feature-list-item').classed('hover', false);
+	    if (sawPrivacyVersion !== context.privacyVersion) {
+	      updateMessage = _t('splash.privacy_update');
+	      showSplash = true;
+	    }
 
-	            if (context.selectedIDs().length > 1 &&
-	                targets && targets.length) {
+	    if (!showSplash) return;
+	    corePreferences('sawSplash', true);
+	    corePreferences('sawPrivacyVersion', context.privacyVersion); // fetch intro graph data now, while user is looking at the splash screen
 
-	                var elements = context.container().selectAll('.feature-list-item')
-	                    .filter(function (node) {
-	                        return targets.indexOf(node) !== -1;
-	                    });
+	    _mainFileFetcher.get('intro_graph');
+	    var modalSelection = uiModal(selection);
+	    modalSelection.select('.modal').attr('class', 'modal-splash modal');
+	    var introModal = modalSelection.select('.content').append('div').attr('class', 'fillL');
+	    introModal.append('div').attr('class', 'modal-section').append('h3').call(_t.append('splash.welcome'));
+	    var modalSection = introModal.append('div').attr('class', 'modal-section');
+	    modalSection.append('p').html(_t.html('splash.text', {
+	      version: context.version,
+	      website: {
+	        html: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/develop/CHANGELOG.md#whats-new">changelog</a>'
+	      },
+	      github: {
+	        html: '<a target="_blank" href="https://github.com/openstreetmap/iD/issues">github.com</a>'
+	      }
+	    }));
+	    modalSection.append('p').html(_t.html('splash.privacy', {
+	      updateMessage: updateMessage,
+	      privacyLink: {
+	        html: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/release/PRIVACY.md">' + _t('splash.privacy_policy') + '</a>'
+	      }
+	    }));
+	    uiSectionPrivacy(context).label(_t.html('splash.privacy_settings')).render(modalSection);
+	    var buttonWrap = introModal.append('div').attr('class', 'modal-actions');
+	    var walkthrough = buttonWrap.append('button').attr('class', 'walkthrough').on('click', function () {
+	      context.container().call(uiIntro(context));
+	      modalSelection.close();
+	    });
+	    walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+	    walkthrough.append('div').call(_t.append('splash.walkthrough'));
+	    var startEditing = buttonWrap.append('button').attr('class', 'start-editing').on('click', modalSelection.close);
+	    startEditing.append('svg').attr('class', 'logo logo-features').append('use').attr('xlink:href', '#iD-logo-features');
+	    startEditing.append('div').call(_t.append('splash.start'));
+	    modalSelection.select('button.close').attr('class', 'hide');
+	  };
+	}
 
-	                if (!elements.empty()) {
-	                    elements.classed('hover', true);
-	                }
-	            }
-	        };
+	function uiStatus(context) {
+	  var osm = context.connection();
+	  return function (selection) {
+	    if (!osm) return;
 
-	        sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
+	    function update(err, apiStatus) {
+	      selection.html('');
 
-	        function hover(targets) {
-	            var datum = targets && targets.length && targets[0];
-	            if (datum && datum.__featurehash__) {   // hovering on data
-	                _wasData = true;
-	                sidebar
-	                    .show(dataEditor.datum(datum));
+	      if (err) {
+	        if (apiStatus === 'connectionSwitched') {
+	          // if the connection was just switched, we can't rely on
+	          // the status (we're getting the status of the previous api)
+	          return;
+	        } else if (apiStatus === 'rateLimited') {
+	          selection.call(_t.append('osm_api_status.message.rateLimit')).append('a').attr('href', '#').attr('class', 'api-status-login').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).append('span').call(_t.append('login')).on('click.login', function (d3_event) {
+	            d3_event.preventDefault();
+	            osm.authenticate();
+	          });
+	        } else {
+	          // don't allow retrying too rapidly
+	          var throttledRetry = throttle(function () {
+	            // try loading the visible tiles
+	            context.loadTiles(context.projection); // manually reload the status too in case all visible tiles were already loaded
 
-	                selection.selectAll('.sidebar-component')
-	                    .classed('inspector-hover', true);
+	            osm.reloadApiStatus();
+	          }, 2000); // eslint-disable-next-line no-warning-comments
+	          // TODO: nice messages for different error types
 
-	            } else if (datum instanceof osmNote) {
-	                if (context.mode().id === 'drag-note') { return; }
-	                _wasNote = true;
 
-	                var osm = services.osm;
-	                if (osm) {
-	                    datum = osm.getNote(datum.id);   // marker may contain stale data - get latest
-	                }
+	          selection.call(_t.append('osm_api_status.message.error', {
+	            suffix: ' '
+	          })).append('a').attr('href', '#') // let the user manually retry their connection directly
+	          .call(_t.append('osm_api_status.retry')).on('click.retry', function (d3_event) {
+	            d3_event.preventDefault();
+	            throttledRetry();
+	          });
+	        }
+	      } else if (apiStatus === 'readonly') {
+	        selection.call(_t.append('osm_api_status.message.readonly'));
+	      } else if (apiStatus === 'offline') {
+	        selection.call(_t.append('osm_api_status.message.offline'));
+	      }
 
-	                sidebar
-	                    .show(noteEditor.note(datum));
+	      selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
+	    }
 
-	                selection.selectAll('.sidebar-component')
-	                    .classed('inspector-hover', true);
+	    osm.on('apiStatusChange.uiStatus', update);
+	    context.history().on('storage_error', function () {
+	      selection.selectAll('span.local-storage-full').remove();
+	      selection.append('span').attr('class', 'local-storage-full').call(_t.append('osm_api_status.message.local_storage_full'));
+	      selection.classed('error', true);
+	    }); // reload the status periodically regardless of other factors
 
-	            } else if (datum instanceof QAItem) {
-	                _wasQaItem = true;
+	    window.setInterval(function () {
+	      osm.reloadApiStatus();
+	    }, 90000); // load the initial status in case no OSM data was loaded yet
 
-	                var errService = services[datum.service];
-	                if (errService) {
-	                    // marker may contain stale data - get latest
-	                    datum = errService.getError(datum.id);
-	                }
+	    osm.reloadApiStatus();
+	  };
+	}
 
-	                // Currently only three possible services
-	                var errEditor;
-	                if (datum.service === 'keepRight') {
-	                    errEditor = keepRightEditor;
-	                } else if (datum.service === 'osmose') {
-	                    errEditor = osmoseEditor;
-	                } else {
-	                    errEditor = improveOsmEditor;
-	                }
+	// for punction see https://stackoverflow.com/a/21224179
 
-	                context.container().selectAll('.qaItem.' + datum.service)
-	                    .classed('hover', function(d) { return d.id === datum.id; });
+	function simplify(str) {
+	  if (typeof str !== 'string') return '';
+	  return diacritics.remove(str.replace(/&/g, 'and').replace(/İ/ig, 'i').replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>«»~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u200b-\u200f\u2016\u2017\u2020-\u2027\u2030-\u2038\u203b-\u203e\u2041-\u2043\u2047-\u2051\u2053\u2055-\u205e\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00\u2e01\u2e06-\u2e08\u2e0b\u2e0e-\u2e16\u2e18\u2e19\u2e1b\u2e1e\u2e1f\u2e2a-\u2e2e\u2e30-\u2e39\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\ufeff\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g, '').toLowerCase());
+	}
 
-	                sidebar
-	                    .show(errEditor.error(datum));
+	// `resolveStrings`
+	// Resolves the text strings for a given community index item
+	//
+	// Arguments
+	//   `item`:  Object containing the community index item
+	//   `defaults`: Object containing the community index default strings
+	//   `localizerFn?`: optional function we will call to do the localization.
+	//      This function should be like the iD `t()` function that
+	//      accepts a `stringID` and returns a localized string
+	//
+	// Returns
+	//   An Object containing all the resolved strings:
+	//   {
+	//     name:                     'talk-ru Mailing List',
+	//     url:                      'https://lists.openstreetmap.org/listinfo/talk-ru',
+	//     signupUrl:                'https://example.url/signup',
+	//     description:              'A one line description',
+	//     extendedDescription:      'Extended description',
+	//     nameHTML:                 '<a href="the url">the name</a>',
+	//     urlHTML:                  '<a href="the url">the url</a>',
+	//     signupUrlHTML:            '<a href="the signupUrl">the signupUrl</a>',
+	//     descriptionHTML:          the description, with urls and signupUrls linkified,
+	//     extendedDescriptionHTML:  the extendedDescription with urls and signupUrls linkified
+	//   }
+	//
 
-	                selection.selectAll('.sidebar-component')
-	                    .classed('inspector-hover', true);
+	function resolveStrings(item, defaults, localizerFn) {
+	  var itemStrings = Object.assign({}, item.strings); // shallow clone
 
-	            } else if (!_current && (datum instanceof osmEntity)) {
-	                featureListWrap
-	                    .classed('inspector-hidden', true);
+	  var defaultStrings = Object.assign({}, defaults[item.type]); // shallow clone
 
-	                inspectorWrap
-	                    .classed('inspector-hidden', false)
-	                    .classed('inspector-hover', true);
+	  var anyToken = new RegExp(/(\{\w+\})/, 'gi'); // Pre-localize the item and default strings
 
-	                if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), [datum.id]) || inspector.state() !== 'hover') {
-	                    inspector
-	                        .state('hover')
-	                        .entityIDs([datum.id])
-	                        .newFeature(false);
+	  if (localizerFn) {
+	    if (itemStrings.community) {
+	      var communityID = simplify(itemStrings.community);
+	      itemStrings.community = localizerFn("_communities.".concat(communityID));
+	    }
 
-	                    inspectorWrap
-	                        .call(inspector);
-	                }
+	    ['name', 'description', 'extendedDescription'].forEach(function (prop) {
+	      if (defaultStrings[prop]) defaultStrings[prop] = localizerFn("_defaults.".concat(item.type, ".").concat(prop));
+	      if (itemStrings[prop]) itemStrings[prop] = localizerFn("".concat(item.id, ".").concat(prop));
+	    });
+	  }
 
-	            } else if (!_current) {
-	                featureListWrap
-	                    .classed('inspector-hidden', false);
-	                inspectorWrap
-	                    .classed('inspector-hidden', true);
-	                inspector
-	                    .state('hide');
-
-	            } else if (_wasData || _wasNote || _wasQaItem) {
-	                _wasNote = false;
-	                _wasData = false;
-	                _wasQaItem = false;
-	                context.container().selectAll('.note').classed('hover', false);
-	                context.container().selectAll('.qaItem').classed('hover', false);
-	                sidebar.hide();
-	            }
-	        }
+	  var replacements = {
+	    account: item.account,
+	    community: itemStrings.community,
+	    signupUrl: itemStrings.signupUrl,
+	    url: itemStrings.url
+	  }; // Resolve URLs first (which may refer to {account})
 
-	        sidebar.hover = throttle(hover, 200);
+	  if (!replacements.signupUrl) {
+	    replacements.signupUrl = resolve(itemStrings.signupUrl || defaultStrings.signupUrl);
+	  }
 
+	  if (!replacements.url) {
+	    replacements.url = resolve(itemStrings.url || defaultStrings.url);
+	  }
 
-	        sidebar.intersects = function(extent) {
-	            var rect = selection.node().getBoundingClientRect();
-	            return extent.intersects([
-	                context.projection.invert([0, rect.height]),
-	                context.projection.invert([rect.width, 0])
-	            ]);
-	        };
+	  var resolved = {
+	    name: resolve(itemStrings.name || defaultStrings.name),
+	    url: resolve(itemStrings.url || defaultStrings.url),
+	    signupUrl: resolve(itemStrings.signupUrl || defaultStrings.signupUrl),
+	    description: resolve(itemStrings.description || defaultStrings.description),
+	    extendedDescription: resolve(itemStrings.extendedDescription || defaultStrings.extendedDescription)
+	  }; // Generate linkified strings
 
+	  resolved.nameHTML = linkify(resolved.url, resolved.name);
+	  resolved.urlHTML = linkify(resolved.url);
+	  resolved.signupUrlHTML = linkify(resolved.signupUrl);
+	  resolved.descriptionHTML = resolve(itemStrings.description || defaultStrings.description, true);
+	  resolved.extendedDescriptionHTML = resolve(itemStrings.extendedDescription || defaultStrings.extendedDescription, true);
+	  return resolved;
 
-	        sidebar.select = function(ids, newFeature) {
-	            sidebar.hide();
+	  function resolve(s, addLinks) {
+	    if (!s) return undefined;
+	    var result = s;
 
-	            if (ids && ids.length) {
+	    for (var key in replacements) {
+	      var token = "{".concat(key, "}");
+	      var regex = new RegExp(token, 'g');
 
-	                var entity = ids.length === 1 && context.entity(ids[0]);
-	                if (entity && newFeature && selection.classed('collapsed')) {
-	                    // uncollapse the sidebar
-	                    var extent = entity.extent(context.graph());
-	                    sidebar.expand(sidebar.intersects(extent));
-	                }
+	      if (regex.test(result)) {
+	        var replacement = replacements[key];
 
-	                featureListWrap
-	                    .classed('inspector-hidden', true);
+	        if (!replacement) {
+	          throw new Error("Cannot resolve token: ".concat(token));
+	        } else {
+	          if (addLinks && (key === 'signupUrl' || key === 'url')) {
+	            replacement = linkify(replacement);
+	          }
 
-	                inspectorWrap
-	                    .classed('inspector-hidden', false)
-	                    .classed('inspector-hover', false);
+	          result = result.replace(regex, replacement);
+	        }
+	      }
+	    } // There shouldn't be any leftover tokens in a resolved string
 
-	                if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), ids) || inspector.state() !== 'select') {
-	                    inspector
-	                        .state('select')
-	                        .entityIDs(ids)
-	                        .newFeature(newFeature);
 
-	                    inspectorWrap
-	                        .call(inspector);
-	                }
+	    var leftovers = result.match(anyToken);
 
-	            } else {
-	                inspector
-	                    .state('hide');
-	            }
-	        };
+	    if (leftovers) {
+	      throw new Error("Cannot resolve tokens: ".concat(leftovers));
+	    } // Linkify subreddits like `/r/openstreetmap`
+	    // https://github.com/osmlab/osm-community-index/issues/82
+	    // https://github.com/openstreetmap/iD/issues/4997
 
 
-	        sidebar.showPresetList = function() {
-	            inspector.showList();
-	        };
+	    if (addLinks && item.type === 'reddit') {
+	      result = result.replace(/(\/r\/\w+\/*)/i, function (match) {
+	        return linkify(resolved.url, match);
+	      });
+	    }
 
+	    return result;
+	  }
 
-	        sidebar.show = function(component, element) {
-	            featureListWrap
-	                .classed('inspector-hidden', true);
-	            inspectorWrap
-	                .classed('inspector-hidden', true);
+	  function linkify(url, text) {
+	    if (!url) return undefined;
+	    text = text || url;
+	    return "<a target=\"_blank\" href=\"".concat(url, "\">").concat(text, "</a>");
+	  }
+	}
 
-	            if (_current) { _current.remove(); }
-	            _current = selection
-	                .append('div')
-	                .attr('class', 'sidebar-component')
-	                .call(component, element);
-	        };
+	var _oci = null;
+	function uiSuccess(context) {
+	  var MAXEVENTS = 2;
+	  var dispatch = dispatch$8('cancel');
 
+	  var _changeset;
 
-	        sidebar.hide = function() {
-	            featureListWrap
-	                .classed('inspector-hidden', false);
-	            inspectorWrap
-	                .classed('inspector-hidden', true);
+	  var _location;
 
-	            if (_current) { _current.remove(); }
-	            _current = null;
-	        };
+	  ensureOSMCommunityIndex(); // start fetching the data
 
+	  function ensureOSMCommunityIndex() {
+	    var data = _mainFileFetcher;
+	    return Promise.all([data.get('oci_features'), data.get('oci_resources'), data.get('oci_defaults')]).then(function (vals) {
+	      if (_oci) return _oci; // Merge Custom Features
 
-	        sidebar.expand = function(moveMap) {
-	            if (selection.classed('collapsed')) {
-	                sidebar.toggle(moveMap);
-	            }
-	        };
+	      if (vals[0] && Array.isArray(vals[0].features)) {
+	        _mainLocations.mergeCustomGeoJSON(vals[0]);
+	      }
 
+	      var ociResources = Object.values(vals[1].resources);
 
-	        sidebar.collapse = function(moveMap) {
-	            if (!selection.classed('collapsed')) {
-	                sidebar.toggle(moveMap);
-	            }
+	      if (ociResources.length) {
+	        // Resolve all locationSet features.
+	        return _mainLocations.mergeLocationSets(ociResources).then(function () {
+	          _oci = {
+	            resources: ociResources,
+	            defaults: vals[2].defaults
+	          };
+	          return _oci;
+	        });
+	      } else {
+	        _oci = {
+	          resources: [],
+	          // no resources?
+	          defaults: vals[2].defaults
 	        };
+	        return _oci;
+	      }
+	    });
+	  } // string-to-date parsing in JavaScript is weird
 
 
-	        sidebar.toggle = function(moveMap) {
-	            var e = event;
-	            if (e && e.sourceEvent) {
-	                e.sourceEvent.preventDefault();
-	            } else if (e) {
-	                e.preventDefault();
-	            }
+	  function parseEventDate(when) {
+	    if (!when) return;
+	    var raw = when.trim();
+	    if (!raw) return;
 
-	            // Don't allow sidebar to toggle when the user is in the walkthrough.
-	            if (context.inIntro()) { return; }
+	    if (!/Z$/.test(raw)) {
+	      // if no trailing 'Z', add one
+	      raw += 'Z'; // this forces date to be parsed as a UTC date
+	    }
 
-	            var isCollapsed = selection.classed('collapsed');
-	            var isCollapsing = !isCollapsed;
-	            var isRTL = (_mainLocalizer.textDirection() === 'rtl');
-	            var scaleX = isRTL ? 0 : 1;
-	            var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+	    var parsed = new Date(raw);
+	    return new Date(parsed.toUTCString().substr(0, 25)); // convert to local timezone
+	  }
 
-	            sidebarWidth = selection.node().getBoundingClientRect().width;
+	  function success(selection) {
+	    var header = selection.append('div').attr('class', 'header fillL');
+	    header.append('h2').call(_t.append('success.just_edited'));
+	    header.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+	      return dispatch.call('cancel');
+	    }).call(svgIcon('#iD-icon-close'));
+	    var body = selection.append('div').attr('class', 'body save-success fillL');
+	    var summary = body.append('div').attr('class', 'save-summary');
+	    summary.append('h3').call(_t.append('success.thank_you' + (_location ? '_location' : ''), {
+	      where: _location
+	    }));
+	    summary.append('p').call(_t.append('success.help_html')).append('a').attr('class', 'link-out').attr('target', '_blank').attr('href', _t('success.help_link_url')).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').call(_t.append('success.help_link_text'));
+	    var osm = context.connection();
+	    if (!osm) return;
+	    var changesetURL = osm.changesetURL(_changeset.id);
+	    var table = summary.append('table').attr('class', 'summary-table');
+	    var row = table.append('tr').attr('class', 'summary-row');
+	    row.append('td').attr('class', 'cell-icon summary-icon').append('a').attr('target', '_blank').attr('href', changesetURL).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', '#iD-logo-osm');
+	    var summaryDetail = row.append('td').attr('class', 'cell-detail summary-detail');
+	    summaryDetail.append('a').attr('class', 'cell-detail summary-view-on-osm').attr('target', '_blank').attr('href', changesetURL).call(_t.append('success.view_on_osm'));
+	    summaryDetail.append('div').html(_t.html('success.changeset_id', {
+	      changeset_id: {
+	        html: "<a href=\"".concat(changesetURL, "\" target=\"_blank\">").concat(_changeset.id, "</a>")
+	      }
+	    })); // Get OSM community index features intersecting the map..
 
-	            // switch from % to px
-	            selection.style('width', sidebarWidth + 'px');
+	    ensureOSMCommunityIndex().then(function (oci) {
+	      var loc = context.map().center();
+	      var validLocations = _mainLocations.locationsAt(loc); // Gather the communities
 
-	            var startMargin, endMargin, lastMargin;
-	            if (isCollapsing) {
-	                startMargin = lastMargin = 0;
-	                endMargin = -sidebarWidth;
-	            } else {
-	                startMargin = lastMargin = -sidebarWidth;
-	                endMargin = 0;
-	            }
+	      var communities = [];
+	      oci.resources.forEach(function (resource) {
+	        var area = validLocations[resource.locationSetID];
+	        if (!area) return; // Resolve strings
 
-	            selection.transition()
-	                .style(xMarginProperty, endMargin + 'px')
-	                .tween('panner', function() {
-	                    var i = d3_interpolateNumber(startMargin, endMargin);
-	                    return function(t) {
-	                        var dx = lastMargin - Math.round(i(t));
-	                        lastMargin = lastMargin - dx;
-	                        context.ui().onResize(moveMap ? undefined : [dx * scaleX, 0]);
-	                    };
-	                })
-	                .on('end', function() {
-	                    selection.classed('collapsed', isCollapsing);
-
-	                    // switch back from px to %
-	                    if (!isCollapsing) {
-	                        var containerWidth = container.node().getBoundingClientRect().width;
-	                        var widthPct = (sidebarWidth / containerWidth) * 100;
-	                        selection
-	                            .style(xMarginProperty, null)
-	                            .style('width', widthPct + '%');
-	                    }
-	                });
+	        var localizer = function localizer(stringID) {
+	          return _t.html("community.".concat(stringID));
 	        };
 
-	        // toggle the sidebar collapse when double-clicking the resizer
-	        resizer.on('dblclick', sidebar.toggle);
-
-	        // ensure hover sidebar is closed when zooming out beyond editable zoom
-	        context.map().on('crossEditableZoom.sidebar', function(within) {
-	            if (!within && !selection.select('.inspector-hover').empty()) {
-	                hover([]);
-	            }
+	        resource.resolved = resolveStrings(resource, oci.defaults, localizer);
+	        communities.push({
+	          area: area,
+	          order: resource.order || 0,
+	          resource: resource
 	        });
-	    }
-
-	    sidebar.showPresetList = function() {};
-	    sidebar.hover = function() {};
-	    sidebar.hover.cancel = function() {};
-	    sidebar.intersects = function() {};
-	    sidebar.select = function() {};
-	    sidebar.show = function() {};
-	    sidebar.hide = function() {};
-	    sidebar.expand = function() {};
-	    sidebar.collapse = function() {};
-	    sidebar.toggle = function() {};
-
-	    return sidebar;
-	}
-
-	function uiSourceSwitch(context) {
-	    var keys;
+	      }); // sort communities by feature area ascending, community order descending
 
+	      communities.sort(function (a, b) {
+	        return a.area - b.area || b.order - a.order;
+	      });
+	      body.call(showCommunityLinks, communities.map(function (c) {
+	        return c.resource;
+	      }));
+	    });
+	  }
 
-	    function click() {
-	        event.preventDefault();
+	  function showCommunityLinks(selection, resources) {
+	    var communityLinks = selection.append('div').attr('class', 'save-communityLinks');
+	    communityLinks.append('h3').call(_t.append('success.like_osm'));
+	    var table = communityLinks.append('table').attr('class', 'community-table');
+	    var row = table.selectAll('.community-row').data(resources);
+	    var rowEnter = row.enter().append('tr').attr('class', 'community-row');
+	    rowEnter.append('td').attr('class', 'cell-icon community-icon').append('a').attr('target', '_blank').attr('href', function (d) {
+	      return d.resolved.url;
+	    }).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', function (d) {
+	      return "#community-".concat(d.type);
+	    });
+	    var communityDetail = rowEnter.append('td').attr('class', 'cell-detail community-detail');
+	    communityDetail.each(showCommunityDetails);
+	    communityLinks.append('div').attr('class', 'community-missing').call(_t.append('success.missing')).append('a').attr('class', 'link-out').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/osmlab/osm-community-index/issues').append('span').call(_t.append('success.tell_us'));
+	  }
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	  function showCommunityDetails(d) {
+	    var selection = select(this);
+	    var communityID = d.id;
+	    selection.append('div').attr('class', 'community-name').html(d.resolved.nameHTML);
+	    selection.append('div').attr('class', 'community-description').html(d.resolved.descriptionHTML); // Create an expanding section if any of these are present..
+
+	    if (d.resolved.extendedDescriptionHTML || d.languageCodes && d.languageCodes.length) {
+	      selection.append('div').call(uiDisclosure(context, "community-more-".concat(d.id), false).expanded(false).updatePreference(false).label(_t.html('success.more')).content(showMore));
+	    }
+
+	    var nextEvents = (d.events || []).map(function (event) {
+	      event.date = parseEventDate(event.when);
+	      return event;
+	    }).filter(function (event) {
+	      // date is valid and future (or today)
+	      var t = event.date.getTime();
+	      var now = new Date().setHours(0, 0, 0, 0);
+	      return !isNaN(t) && t >= now;
+	    }).sort(function (a, b) {
+	      // sort by date ascending
+	      return a.date < b.date ? -1 : a.date > b.date ? 1 : 0;
+	    }).slice(0, MAXEVENTS); // limit number of events shown
 
-	        if (context.inIntro()) { return; }
+	    if (nextEvents.length) {
+	      selection.append('div').call(uiDisclosure(context, "community-events-".concat(d.id), false).expanded(false).updatePreference(false).label(_t.html('success.events')).content(showNextEvents)).select('.hide-toggle').append('span').attr('class', 'badge-text').text(nextEvents.length);
+	    }
 
-	        if (context.history().hasChanges() &&
-	            !window.confirm(_t('source_switch.lose_changes'))) { return; }
+	    function showMore(selection) {
+	      var more = selection.selectAll('.community-more').data([0]);
+	      var moreEnter = more.enter().append('div').attr('class', 'community-more');
 
-	        var isLive = select(this)
-	            .classed('live');
+	      if (d.resolved.extendedDescriptionHTML) {
+	        moreEnter.append('div').attr('class', 'community-extended-description').html(d.resolved.extendedDescriptionHTML);
+	      }
 
-	        isLive = !isLive;
-	        context.enter(modeBrowse(context));
-	        context.history().clearSaved();          // remove saved history
-	        context.flush();                         // remove stored data
+	      if (d.languageCodes && d.languageCodes.length) {
+	        var languageList = d.languageCodes.map(function (code) {
+	          return _mainLocalizer.languageName(code);
+	        }).join(', ');
+	        moreEnter.append('div').attr('class', 'community-languages').call(_t.append('success.languages', {
+	          languages: languageList
+	        }));
+	      }
+	    }
 
-	        select(this)
-	            .text(isLive ? _t('source_switch.live') : _t('source_switch.dev'))
-	            .classed('live', isLive)
-	            .classed('chip', isLive);
+	    function showNextEvents(selection) {
+	      var events = selection.append('div').attr('class', 'community-events');
+	      var item = events.selectAll('.community-event').data(nextEvents);
+	      var itemEnter = item.enter().append('div').attr('class', 'community-event');
+	      itemEnter.append('div').attr('class', 'community-event-name').append('a').attr('target', '_blank').attr('href', function (d) {
+	        return d.url;
+	      }).text(function (d) {
+	        var name = d.name;
+
+	        if (d.i18n && d.id) {
+	          name = _t("community.".concat(communityID, ".events.").concat(d.id, ".name"), {
+	            "default": name
+	          });
+	        }
 
-	        osm.switch(isLive ? keys[0] : keys[1]);  // switch connection (warning: dispatches 'change' event)
-	    }
+	        return name;
+	      });
+	      itemEnter.append('div').attr('class', 'community-event-when').text(function (d) {
+	        var options = {
+	          weekday: 'short',
+	          day: 'numeric',
+	          month: 'short',
+	          year: 'numeric'
+	        };
 
-	    var sourceSwitch = function(selection) {
-	        selection
-	            .append('a')
-	            .attr('href', '#')
-	            .text(_t('source_switch.live'))
-	            .attr('class', 'live chip')
-	            .on('click', click);
-	    };
+	        if (d.date.getHours() || d.date.getMinutes()) {
+	          // include time if it has one
+	          options.hour = 'numeric';
+	          options.minute = 'numeric';
+	        }
 
+	        return d.date.toLocaleString(_mainLocalizer.localeCode(), options);
+	      });
+	      itemEnter.append('div').attr('class', 'community-event-where').text(function (d) {
+	        var where = d.where;
 
-	    sourceSwitch.keys = function(_) {
-	        if (!arguments.length) { return keys; }
-	        keys = _;
-	        return sourceSwitch;
-	    };
+	        if (d.i18n && d.id) {
+	          where = _t("community.".concat(communityID, ".events.").concat(d.id, ".where"), {
+	            "default": where
+	          });
+	        }
 
+	        return where;
+	      });
+	      itemEnter.append('div').attr('class', 'community-event-description').text(function (d) {
+	        var description = d.description;
 
-	    return sourceSwitch;
-	}
+	        if (d.i18n && d.id) {
+	          description = _t("community.".concat(communityID, ".events.").concat(d.id, ".description"), {
+	            "default": description
+	          });
+	        }
 
-	function uiSpinner(context) {
-	    var osm = context.connection();
+	        return description;
+	      });
+	    }
+	  }
 
+	  success.changeset = function (val) {
+	    if (!arguments.length) return _changeset;
+	    _changeset = val;
+	    return success;
+	  };
 
-	    return function(selection) {
-	        var img = selection
-	            .append('img')
-	            .attr('src', context.imagePath('loader-black.gif'))
-	            .style('opacity', 0);
+	  success.location = function (val) {
+	    if (!arguments.length) return _location;
+	    _location = val;
+	    return success;
+	  };
 
-	        if (osm) {
-	            osm
-	                .on('loading.spinner', function() {
-	                    img.transition()
-	                        .style('opacity', 1);
-	                })
-	                .on('loaded.spinner', function() {
-	                    img.transition()
-	                        .style('opacity', 0);
-	                });
-	        }
-	    };
+	  return utilRebind(success, dispatch, 'on');
 	}
 
-	function uiSplash(context) {
-	  return function (selection) {
-	    // Exception - if there are restorable changes, skip this splash screen.
-	    // This is because we currently only support one `uiModal` at a time
-	    //  and we need to show them `uiRestore`` instead of this one.
-	    if (context.history().hasRestorableChanges()) { return; }
+	var sawVersion = null;
+	var isNewVersion = false;
+	var isNewUser = false;
+	function uiVersion(context) {
+	  var currVersion = context.version;
+	  var matchedVersion = currVersion.match(/\d+\.\d+\.\d+.*/);
 
-	    // If user has not seen this version of the privacy policy, show the splash again.
-	    var updateMessage = '';
-	    var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
-	    var showSplash = !corePreferences('sawSplash');
-	    if (sawPrivacyVersion !== context.privacyVersion) {
-	      updateMessage = _t('splash.privacy_update');
-	      showSplash = true;
+	  if (sawVersion === null && matchedVersion !== null) {
+	    if (corePreferences('sawVersion')) {
+	      isNewUser = false;
+	      isNewVersion = corePreferences('sawVersion') !== currVersion && currVersion.indexOf('-') === -1;
+	    } else {
+	      isNewUser = true;
+	      isNewVersion = true;
 	    }
 
-	    if (!showSplash) { return; }
+	    corePreferences('sawVersion', currVersion);
+	    sawVersion = currVersion;
+	  }
 
-	    corePreferences('sawSplash', true);
-	    corePreferences('sawPrivacyVersion', context.privacyVersion);
+	  return function (selection) {
+	    selection.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD').text(currVersion); // only show new version indicator to users that have used iD before
 
-	    // fetch intro graph data now, while user is looking at the splash screen
-	    _mainFileFetcher.get('intro_graph');
+	    if (isNewVersion && !isNewUser) {
+	      selection.append('a').attr('class', 'badge').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/blob/release/CHANGELOG.md#whats-new').call(svgIcon('#maki-gift-11')).call(uiTooltip().title(_t.html('version.whats_new', {
+	        version: currVersion
+	      })).placement('top').scrollContainer(context.container().select('.main-footer-wrap')));
+	    }
+	  };
+	}
 
-	    var modalSelection = uiModal(selection);
+	function uiZoom(context) {
+	  var zooms = [{
+	    id: 'zoom-in',
+	    icon: 'iD-icon-plus',
+	    title: _t.html('zoom.in'),
+	    action: zoomIn,
+	    disabled: function disabled() {
+	      return !context.map().canZoomIn();
+	    },
+	    disabledTitle: _t.html('zoom.disabled.in'),
+	    key: '+'
+	  }, {
+	    id: 'zoom-out',
+	    icon: 'iD-icon-minus',
+	    title: _t.html('zoom.out'),
+	    action: zoomOut,
+	    disabled: function disabled() {
+	      return !context.map().canZoomOut();
+	    },
+	    disabledTitle: _t.html('zoom.disabled.out'),
+	    key: '-'
+	  }];
 
-	    modalSelection.select('.modal')
-	      .attr('class', 'modal-splash modal');
-
-	    var introModal = modalSelection.select('.content')
-	      .append('div')
-	      .attr('class', 'fillL');
-
-	    introModal
-	      .append('div')
-	      .attr('class','modal-section')
-	      .append('h3')
-	      .text(_t('splash.welcome'));
-
-	    var modalSection = introModal
-	      .append('div')
-	      .attr('class','modal-section');
-
-	    modalSection
-	      .append('p')
-	      .html(_t('splash.text', {
-	        version: context.version,
-	        website: '<a target="_blank" href="http://ideditor.blog/">ideditor.blog</a>',
-	        github: '<a target="_blank" href="https://github.com/openstreetmap/iD">github.com</a>'
-	      }));
+	  function zoomIn(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomIn();
+	  }
 
-	    modalSection
-	      .append('p')
-	      .html(_t('splash.privacy', {
-	        updateMessage: updateMessage,
-	        privacyLink: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/release/PRIVACY.md">' +
-	          _t('splash.privacy_policy') + '</a>'
-	      }));
+	  function zoomOut(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomOut();
+	  }
 
-	    var buttonWrap = introModal
-	      .append('div')
-	      .attr('class', 'modal-actions');
+	  function zoomInFurther(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomInFurther();
+	  }
 
-	    var walkthrough = buttonWrap
-	      .append('button')
-	      .attr('class', 'walkthrough')
-	      .on('click', function () {
-	        context.container().call(uiIntro(context));
-	        modalSelection.close();
-	      });
+	  function zoomOutFurther(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomOutFurther();
+	  }
 
-	    walkthrough
-	      .append('svg')
-	      .attr('class', 'logo logo-walkthrough')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-walkthrough');
+	  return function (selection) {
+	    var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function (d) {
+	      if (d.disabled()) {
+	        return d.disabledTitle;
+	      }
 
-	    walkthrough
-	      .append('div')
-	      .text(_t('splash.walkthrough'));
+	      return d.title;
+	    }).keys(function (d) {
+	      return [d.key];
+	    });
+	    var lastPointerUpType;
+	    var buttons = selection.selectAll('button').data(zooms).enter().append('button').attr('class', function (d) {
+	      return d.id;
+	    }).on('pointerup.editor', function (d3_event) {
+	      lastPointerUpType = d3_event.pointerType;
+	    }).on('click.editor', function (d3_event, d) {
+	      if (!d.disabled()) {
+	        d.action(d3_event);
+	      } else if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+	        context.ui().flash.duration(2000).iconName('#' + d.icon).iconClass('disabled').label(d.disabledTitle)();
+	      }
 
-	    var startEditing = buttonWrap
-	      .append('button')
-	      .attr('class', 'start-editing')
-	      .on('click', modalSelection.close);
+	      lastPointerUpType = null;
+	    }).call(tooltipBehavior);
+	    buttons.each(function (d) {
+	      select(this).call(svgIcon('#' + d.icon, 'light'));
+	    });
+	    utilKeybinding.plusKeys.forEach(function (key) {
+	      context.keybinding().on([key], zoomIn);
+	      context.keybinding().on([uiCmd('⌥' + key)], zoomInFurther);
+	    });
+	    utilKeybinding.minusKeys.forEach(function (key) {
+	      context.keybinding().on([key], zoomOut);
+	      context.keybinding().on([uiCmd('⌥' + key)], zoomOutFurther);
+	    });
 
-	    startEditing
-	      .append('svg')
-	      .attr('class', 'logo logo-features')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-features');
+	    function updateButtonStates() {
+	      buttons.classed('disabled', function (d) {
+	        return d.disabled();
+	      }).each(function () {
+	        var selection = select(this);
 
-	    startEditing
-	      .append('div')
-	      .text(_t('splash.start'));
+	        if (!selection.select('.tooltip.in').empty()) {
+	          selection.call(tooltipBehavior.updateContent);
+	        }
+	      });
+	    }
 
-	    modalSelection.select('button.close')
-	      .attr('class','hide');
+	    updateButtonStates();
+	    context.map().on('move.uiZoom', updateButtonStates);
 	  };
 	}
 
-	function uiStatus(context) {
-	    var osm = context.connection();
+	function uiSectionRawTagEditor(id, context) {
+	  var section = uiSection(id, context).classes('raw-tag-editor').label(function () {
+	    var count = Object.keys(_tags).filter(function (d) {
+	      return d;
+	    }).length;
+	    return _t.html('inspector.title_count', {
+	      title: {
+	        html: _t.html('inspector.tags')
+	      },
+	      count: count
+	    });
+	  }).expandedByDefault(false).disclosureContent(renderDisclosureContent);
+	  var taginfo = services.taginfo;
+	  var dispatch = dispatch$8('change');
+	  var availableViews = [{
+	    id: 'list',
+	    icon: '#fas-th-list'
+	  }, {
+	    id: 'text',
+	    icon: '#fas-i-cursor'
+	  }];
 
+	  var _tagView = corePreferences('raw-tag-editor-view') || 'list'; // 'list, 'text'
 
-	    return function(selection) {
-	        if (!osm) { return; }
 
-	        function update(err, apiStatus) {
-	            selection.html('');
+	  var _readOnlyTags = []; // the keys in the order we want them to display
 
-	            if (err) {
-	                if (apiStatus === 'connectionSwitched') {
-	                    // if the connection was just switched, we can't rely on
-	                    // the status (we're getting the status of the previous api)
-	                    return;
-
-	                } else if (apiStatus === 'rateLimited') {
-	                    selection
-	                        .text(_t('osm_api_status.message.rateLimit'))
-	                        .append('a')
-	                        .attr('class', 'api-status-login')
-	                        .attr('target', '_blank')
-	                        .call(svgIcon('#iD-icon-out-link', 'inline'))
-	                        .append('span')
-	                        .text(_t('login'))
-	                        .on('click.login', function() {
-	                            event.preventDefault();
-	                            osm.authenticate();
-	                        });
-	                } else {
+	  var _orderedKeys = [];
+	  var _showBlank = false;
+	  var _pendingChange = null;
 
-	                    // don't allow retrying too rapidly
-	                    var throttledRetry = throttle(function() {
-	                        // try loading the visible tiles
-	                        context.loadTiles(context.projection);
-	                        // manually reload the status too in case all visible tiles were already loaded
-	                        osm.reloadApiStatus();
-	                    }, 2000);
-
-	                    // eslint-disable-next-line no-warning-comments
-	                    // TODO: nice messages for different error types
-	                    selection
-	                        .text(_t('osm_api_status.message.error') + ' ')
-	                        .append('a')
-	                        // let the user manually retry their connection directly
-	                        .text(_t('osm_api_status.retry'))
-	                        .on('click.retry', function() {
-	                            event.preventDefault();
-	                            throttledRetry();
-	                        });
-	                }
+	  var _state;
 
-	            } else if (apiStatus === 'readonly') {
-	                selection.text(_t('osm_api_status.message.readonly'));
-	            } else if (apiStatus === 'offline') {
-	                selection.text(_t('osm_api_status.message.offline'));
-	            }
+	  var _presets;
 
-	            selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
-	        }
+	  var _tags;
 
-	        osm.on('apiStatusChange.uiStatus', update);
+	  var _entityIDs;
 
-	        // reload the status periodically regardless of other factors
-	        window.setInterval(function() {
-	            osm.reloadApiStatus();
-	        }, 90000);
+	  var _didInteract = false;
 
-	        // load the initial status in case no OSM data was loaded yet
-	        osm.reloadApiStatus();
-	    };
-	}
+	  function interacted() {
+	    _didInteract = true;
+	  }
 
-	function modeDrawArea(context, wayID, startGraph, button) {
-	    var mode = {
-	        button: button,
-	        id: 'draw-area'
-	    };
+	  function renderDisclosureContent(wrap) {
+	    // remove deleted keys
+	    _orderedKeys = _orderedKeys.filter(function (key) {
+	      return _tags[key] !== undefined;
+	    }); // When switching to a different entity or changing the state (hover/select)
+	    // reorder the keys alphabetically.
+	    // We trigger this by emptying the `_orderedKeys` array, then it will be rebuilt here.
+	    // Otherwise leave their order alone - #5857, #5927
 
-	    var behavior = behaviorDrawWay(context, wayID, mode, startGraph)
-	        .on('rejectedSelfIntersection.modeDrawArea', function() {
-	            context.ui().flash
-	                .text(_t('self_intersection.error.areas'))();
-	        });
+	    var all = Object.keys(_tags).sort();
+	    var missingKeys = utilArrayDifference(all, _orderedKeys);
 
-	    mode.wayID = wayID;
+	    for (var i in missingKeys) {
+	      _orderedKeys.push(missingKeys[i]);
+	    } // assemble row data
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	    var rowData = _orderedKeys.map(function (key, i) {
+	      return {
+	        index: i,
+	        key: key,
+	        value: _tags[key]
+	      };
+	    }); // append blank row last, if necessary
 
-	    mode.selectedIDs = function() {
-	        return [wayID];
-	    };
 
-	    mode.activeID = function() {
-	        return (behavior && behavior.activeID()) || [];
-	    };
+	    if (!rowData.length || _showBlank) {
+	      _showBlank = false;
+	      rowData.push({
+	        index: rowData.length,
+	        key: '',
+	        value: ''
+	      });
+	    } // View Options
+
+
+	    var options = wrap.selectAll('.raw-tag-options').data([0]);
+	    options.exit().remove();
+	    var optionsEnter = options.enter().insert('div', ':first-child').attr('class', 'raw-tag-options').attr('role', 'tablist');
+	    var optionEnter = optionsEnter.selectAll('.raw-tag-option').data(availableViews, function (d) {
+	      return d.id;
+	    }).enter();
+	    optionEnter.append('button').attr('class', function (d) {
+	      return 'raw-tag-option raw-tag-option-' + d.id + (_tagView === d.id ? ' selected' : '');
+	    }).attr('aria-selected', function (d) {
+	      return _tagView === d.id;
+	    }).attr('role', 'tab').attr('title', function (d) {
+	      return _t('icons.' + d.id);
+	    }).on('click', function (d3_event, d) {
+	      _tagView = d.id;
+	      corePreferences('raw-tag-editor-view', d.id);
+	      wrap.selectAll('.raw-tag-option').classed('selected', function (datum) {
+	        return datum === d;
+	      }).attr('aria-selected', function (datum) {
+	        return datum === d;
+	      });
+	      wrap.selectAll('.tag-text').classed('hide', d.id !== 'text').each(setTextareaHeight);
+	      wrap.selectAll('.tag-list, .add-row').classed('hide', d.id !== 'list');
+	    }).each(function (d) {
+	      select(this).call(svgIcon(d.icon));
+	    }); // View as Text
 
-	    return mode;
-	}
+	    var textData = rowsToText(rowData);
+	    var textarea = wrap.selectAll('.tag-text').data([0]);
+	    textarea = textarea.enter().append('textarea').attr('class', 'tag-text' + (_tagView !== 'text' ? ' hide' : '')).call(utilNoAuto).attr('placeholder', _t('inspector.key_value')).attr('spellcheck', 'false').merge(textarea);
+	    textarea.call(utilGetSetValue, textData).each(setTextareaHeight).on('input', setTextareaHeight).on('focus', interacted).on('blur', textChanged).on('change', textChanged); // View as List
 
-	function modeAddArea(context, mode) {
-	    mode.id = 'add-area';
+	    var list = wrap.selectAll('.tag-list').data([0]);
+	    list = list.enter().append('ul').attr('class', 'tag-list' + (_tagView !== 'list' ? ' hide' : '')).merge(list); // Container for the Add button
 
-	    var behavior = behaviorAddWay(context)
-	        .on('start', start)
-	        .on('startFromWay', startFromWay)
-	        .on('startFromNode', startFromNode);
+	    var addRowEnter = wrap.selectAll('.add-row').data([0]).enter().append('div').attr('class', 'add-row' + (_tagView !== 'list' ? ' hide' : ''));
+	    addRowEnter.append('button').attr('class', 'add-tag').attr('aria-label', _t('inspector.add_to_tag')).call(svgIcon('#iD-icon-plus', 'light')).call(uiTooltip().title(_t.html('inspector.add_to_tag')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left')).on('click', addTag);
+	    addRowEnter.append('div').attr('class', 'space-value'); // preserve space
 
-	    var defaultTags = { area: 'yes' };
-	    if (mode.preset) { defaultTags = mode.preset.setTags(defaultTags, 'area'); }
+	    addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+	    // Tag list items
 
+	    var items = list.selectAll('.tag-row').data(rowData, function (d) {
+	      return d.key;
+	    });
+	    items.exit().each(unbind).remove(); // Enter
 
-	    function actionClose(wayId) {
-	        return function (graph) {
-	            return graph.replace(graph.entity(wayId).close());
-	        };
-	    }
+	    var itemsEnter = items.enter().append('li').attr('class', 'tag-row').classed('readonly', isReadOnly);
+	    var innerWrap = itemsEnter.append('div').attr('class', 'inner-wrap');
+	    innerWrap.append('div').attr('class', 'key-wrap').append('input').property('type', 'text').attr('class', 'key').call(utilNoAuto).on('focus', interacted).on('blur', keyChange).on('change', keyChange);
+	    innerWrap.append('div').attr('class', 'value-wrap').append('input').property('type', 'text').attr('class', 'value').call(utilNoAuto).on('focus', interacted).on('blur', valueChange).on('change', valueChange).on('keydown.push-more', pushMore);
+	    innerWrap.append('button').attr('class', 'form-field-button remove').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete')); // Update
 
+	    items = items.merge(itemsEnter).sort(function (a, b) {
+	      return a.index - b.index;
+	    });
+	    items.each(function (d) {
+	      var row = select(this);
+	      var key = row.select('input.key'); // propagate bound data
 
-	    function start(loc) {
-	        var startGraph = context.graph();
-	        var node = osmNode({ loc: loc });
-	        var way = osmWay({ tags: defaultTags });
+	      var value = row.select('input.value'); // propagate bound data
 
-	        context.perform(
-	            actionAddEntity(node),
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id),
-	            actionClose(way.id)
-	        );
+	      if (_entityIDs && taginfo && _state !== 'hover') {
+	        bindTypeahead(key, value);
+	      }
 
-	        context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
-	    }
+	      var referenceOptions = {
+	        key: d.key
+	      };
+
+	      if (typeof d.value === 'string') {
+	        referenceOptions.value = d.value;
+	      }
 
+	      var reference = uiTagReference(referenceOptions);
 
-	    function startFromWay(loc, edge) {
-	        var startGraph = context.graph();
-	        var node = osmNode({ loc: loc });
-	        var way = osmWay({ tags: defaultTags });
+	      if (_state === 'hover') {
+	        reference.showing(false);
+	      }
 
-	        context.perform(
-	            actionAddEntity(node),
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id),
-	            actionClose(way.id),
-	            actionAddMidpoint({ loc: loc, edge: edge }, node)
-	        );
+	      row.select('.inner-wrap') // propagate bound data
+	      .call(reference.button);
+	      row.call(reference.body);
+	      row.select('button.remove'); // propagate bound data
+	    });
+	    items.selectAll('input.key').attr('title', function (d) {
+	      return d.key;
+	    }).call(utilGetSetValue, function (d) {
+	      return d.key;
+	    }).attr('readonly', function (d) {
+	      return isReadOnly(d) || null;
+	    });
+	    items.selectAll('input.value').attr('title', function (d) {
+	      return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : d.value;
+	    }).classed('mixed', function (d) {
+	      return Array.isArray(d.value);
+	    }).attr('placeholder', function (d) {
+	      return typeof d.value === 'string' ? null : _t('inspector.multiple_values');
+	    }).call(utilGetSetValue, function (d) {
+	      return typeof d.value === 'string' ? d.value : '';
+	    }).attr('readonly', function (d) {
+	      return isReadOnly(d) || null;
+	    });
+	    items.selectAll('button.remove').on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'down', removeTag); // 'click' fires too late - #5878
+	  }
 
-	        context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	  function isReadOnly(d) {
+	    for (var i = 0; i < _readOnlyTags.length; i++) {
+	      if (d.key.match(_readOnlyTags[i]) !== null) {
+	        return true;
+	      }
 	    }
 
+	    return false;
+	  }
+
+	  function setTextareaHeight() {
+	    if (_tagView !== 'text') return;
+	    var selection = select(this);
+	    var matches = selection.node().value.match(/\n/g);
+	    var lineCount = 2 + Number(matches && matches.length);
+	    var lineHeight = 20;
+	    selection.style('height', lineCount * lineHeight + 'px');
+	  }
 
-	    function startFromNode(node) {
-	        var startGraph = context.graph();
-	        var way = osmWay({ tags: defaultTags });
+	  function stringify(s) {
+	    return JSON.stringify(s).slice(1, -1); // without leading/trailing "
+	  }
 
-	        context.perform(
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id),
-	            actionClose(way.id)
-	        );
+	  function unstringify(s) {
+	    var leading = '';
+	    var trailing = '';
 
-	        context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	    if (s.length < 1 || s.charAt(0) !== '"') {
+	      leading = '"';
 	    }
 
+	    if (s.length < 2 || s.charAt(s.length - 1) !== '"' || s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\') {
+	      trailing = '"';
+	    }
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
+	    return JSON.parse(leading + s + trailing);
+	  }
 
+	  function rowsToText(rows) {
+	    var str = rows.filter(function (row) {
+	      return row.key && row.key.trim() !== '';
+	    }).map(function (row) {
+	      var rawVal = row.value;
+	      if (typeof rawVal !== 'string') rawVal = '*';
+	      var val = rawVal ? stringify(rawVal) : '';
+	      return stringify(row.key) + '=' + val;
+	    }).join('\n');
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	    if (_state !== 'hover' && str.length) {
+	      return str + '\n';
+	    }
 
+	    return str;
+	  }
 
-	    return mode;
-	}
+	  function textChanged() {
+	    var newText = this.value.trim();
+	    var newTags = {};
+	    newText.split('\n').forEach(function (row) {
+	      var m = row.match(/^\s*([^=]+)=(.*)$/);
 
-	function modeAddLine(context, mode) {
-	    mode.id = 'add-line';
+	      if (m !== null) {
+	        var k = context.cleanTagKey(unstringify(m[1].trim()));
+	        var v = context.cleanTagValue(unstringify(m[2].trim()));
+	        newTags[k] = v;
+	      }
+	    });
+	    var tagDiff = utilTagDiff(_tags, newTags);
+	    if (!tagDiff.length) return;
+	    _pendingChange = _pendingChange || {};
+	    tagDiff.forEach(function (change) {
+	      if (isReadOnly({
+	        key: change.key
+	      })) return; // skip unchanged multiselection placeholders
+
+	      if (change.newVal === '*' && typeof change.oldVal !== 'string') return;
+
+	      if (change.type === '-') {
+	        _pendingChange[change.key] = undefined;
+	      } else if (change.type === '+') {
+	        _pendingChange[change.key] = change.newVal || '';
+	      }
+	    });
 
-	    var behavior = behaviorAddWay(context)
-	        .on('start', start)
-	        .on('startFromWay', startFromWay)
-	        .on('startFromNode', startFromNode);
+	    if (Object.keys(_pendingChange).length === 0) {
+	      _pendingChange = null;
+	      return;
+	    }
 
-	    var defaultTags = {};
-	    if (mode.preset) { defaultTags = mode.preset.setTags(defaultTags, 'line'); }
+	    scheduleChange();
+	  }
 
+	  function pushMore(d3_event) {
+	    // if pressing Tab on the last value field with content, add a blank row
+	    if (d3_event.keyCode === 9 && !d3_event.shiftKey && section.selection().selectAll('.tag-list li:last-child input.value').node() === this && utilGetSetValue(select(this))) {
+	      addTag();
+	    }
+	  }
 
-	    function start(loc) {
-	        var startGraph = context.graph();
-	        var node = osmNode({ loc: loc });
-	        var way = osmWay({ tags: defaultTags });
+	  function bindTypeahead(key, value) {
+	    if (isReadOnly(key.datum())) return;
 
-	        context.perform(
-	            actionAddEntity(node),
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id)
-	        );
+	    if (Array.isArray(value.datum().value)) {
+	      value.call(uiCombobox(context, 'tag-value').minItems(1).fetcher(function (value, callback) {
+	        var keyString = utilGetSetValue(key);
+	        if (!_tags[keyString]) return;
 
-	        context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+	        var data = _tags[keyString].filter(Boolean).map(function (tagValue) {
+	          return {
+	            value: tagValue,
+	            title: tagValue
+	          };
+	        });
+
+	        callback(data);
+	      }));
+	      return;
 	    }
 
+	    var geometry = context.graph().geometry(_entityIDs[0]);
+	    key.call(uiCombobox(context, 'tag-key').fetcher(function (value, callback) {
+	      taginfo.keys({
+	        debounce: true,
+	        geometry: geometry,
+	        query: value
+	      }, function (err, data) {
+	        if (!err) {
+	          var filtered = data.filter(function (d) {
+	            return _tags[d.value] === undefined;
+	          });
+	          callback(sort(value, filtered));
+	        }
+	      });
+	    }));
+	    value.call(uiCombobox(context, 'tag-value').fetcher(function (value, callback) {
+	      taginfo.values({
+	        debounce: true,
+	        key: utilGetSetValue(key),
+	        geometry: geometry,
+	        query: value
+	      }, function (err, data) {
+	        if (!err) callback(sort(value, data));
+	      });
+	    }));
 
-	    function startFromWay(loc, edge) {
-	        var startGraph = context.graph();
-	        var node = osmNode({ loc: loc });
-	        var way = osmWay({ tags: defaultTags });
+	    function sort(value, data) {
+	      var sameletter = [];
+	      var other = [];
 
-	        context.perform(
-	            actionAddEntity(node),
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id),
-	            actionAddMidpoint({ loc: loc, edge: edge }, node)
-	        );
+	      for (var i = 0; i < data.length; i++) {
+	        if (data[i].value.substring(0, value.length) === value) {
+	          sameletter.push(data[i]);
+	        } else {
+	          other.push(data[i]);
+	        }
+	      }
 
-	        context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+	      return sameletter.concat(other);
 	    }
+	  }
 
+	  function unbind() {
+	    var row = select(this);
+	    row.selectAll('input.key').call(uiCombobox.off, context);
+	    row.selectAll('input.value').call(uiCombobox.off, context);
+	  }
 
-	    function startFromNode(node) {
-	        var startGraph = context.graph();
-	        var way = osmWay({ tags: defaultTags });
+	  function keyChange(d3_event, d) {
+	    if (select(this).attr('readonly')) return;
+	    var kOld = d.key; // exit if we are currently about to delete this row anyway - #6366
 
-	        context.perform(
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id)
-	        );
+	    if (_pendingChange && _pendingChange.hasOwnProperty(kOld) && _pendingChange[kOld] === undefined) return;
+	    var kNew = context.cleanTagKey(this.value.trim()); // allow no change if the key should be readonly
 
-	        context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+	    if (isReadOnly({
+	      key: kNew
+	    })) {
+	      this.value = kOld;
+	      return;
 	    }
 
+	    if (kNew && kNew !== kOld && _tags[kNew] !== undefined) {
+	      // new key is already in use, switch focus to the existing row
+	      this.value = kOld; // reset the key
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
+	      section.selection().selectAll('.tag-list input.value').each(function (d) {
+	        if (d.key === kNew) {
+	          // send focus to that other value combo instead
+	          var input = select(this).node();
+	          input.focus();
+	          input.select();
+	        }
+	      });
+	      return;
+	    }
 
+	    _pendingChange = _pendingChange || {};
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	    if (kOld) {
+	      if (kOld === kNew) return; // a tag key was renamed
 
-	    return mode;
-	}
+	      _pendingChange[kNew] = _pendingChange[kOld] || {
+	        oldKey: kOld
+	      };
+	      _pendingChange[kOld] = undefined;
+	    } else {
+	      // a new tag was added
+	      var row = this.parentNode.parentNode;
+	      var inputVal = select(row).selectAll('input.value');
+	      var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
+	      _pendingChange[kNew] = vNew;
+	      utilGetSetValue(inputVal, vNew);
+	    } // update the ordered key index so this row doesn't change position
 
-	function modeAddPoint(context, mode) {
 
-	    mode.id = 'add-point';
+	    var existingKeyIndex = _orderedKeys.indexOf(kOld);
 
-	    var behavior = behaviorDraw(context)
-	        .on('click', add)
-	        .on('clickWay', addWay)
-	        .on('clickNode', addNode)
-	        .on('cancel', cancel)
-	        .on('finish', cancel);
+	    if (existingKeyIndex !== -1) _orderedKeys[existingKeyIndex] = kNew;
+	    d.key = kNew; // update datum to avoid exit/enter on tag update
 
-	    var defaultTags = {};
-	    if (mode.preset) { defaultTags = mode.preset.setTags(defaultTags, 'point'); }
+	    this.value = kNew;
+	    scheduleChange();
+	  }
 
+	  function valueChange(d3_event, d) {
+	    if (isReadOnly(d)) return; // exit if this is a multiselection and no value was entered
 
-	    function add(loc) {
-	        var node = osmNode({ loc: loc, tags: defaultTags });
+	    if (typeof d.value !== 'string' && !this.value) return; // exit if we are currently about to delete this row anyway - #6366
 
-	        context.perform(
-	            actionAddEntity(node),
-	            _t('operations.add.annotation.point')
-	        );
+	    if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) return;
+	    _pendingChange = _pendingChange || {};
+	    _pendingChange[d.key] = context.cleanTagValue(this.value);
+	    scheduleChange();
+	  }
+
+	  function removeTag(d3_event, d) {
+	    if (isReadOnly(d)) return;
 
-	        enterSelectMode(node);
+	    if (d.key === '') {
+	      // removing the blank row
+	      _showBlank = false;
+	      section.reRender();
+	    } else {
+	      // remove the key from the ordered key index
+	      _orderedKeys = _orderedKeys.filter(function (key) {
+	        return key !== d.key;
+	      });
+	      _pendingChange = _pendingChange || {};
+	      _pendingChange[d.key] = undefined;
+	      scheduleChange();
 	    }
+	  }
 
+	  function addTag() {
+	    // Delay render in case this click is blurring an edited combo.
+	    // Without the setTimeout, the `content` render would wipe out the pending tag change.
+	    window.setTimeout(function () {
+	      _showBlank = true;
+	      section.reRender();
+	      section.selection().selectAll('.tag-list li:last-child input.key').node().focus();
+	    }, 20);
+	  }
 
-	    function addWay(loc, edge) {
-	        var node = osmNode({ tags: defaultTags });
+	  function scheduleChange() {
+	    // Cache IDs in case the editor is reloaded before the change event is called. - #6028
+	    var entityIDs = _entityIDs; // Delay change in case this change is blurring an edited combo. - #5878
 
-	        context.perform(
-	            actionAddMidpoint({loc: loc, edge: edge}, node),
-	            _t('operations.add.annotation.vertex')
-	        );
+	    window.setTimeout(function () {
+	      if (!_pendingChange) return;
+	      dispatch.call('change', this, entityIDs, _pendingChange);
+	      _pendingChange = null;
+	    }, 10);
+	  }
 
-	        enterSelectMode(node);
-	    }
+	  section.state = function (val) {
+	    if (!arguments.length) return _state;
 
-	    function enterSelectMode(node) {
-	        context.enter(
-	            modeSelect(context, [node.id]).newFeature(true)
-	        );
+	    if (_state !== val) {
+	      _orderedKeys = [];
+	      _state = val;
 	    }
 
+	    return section;
+	  };
 
-	    function addNode(node) {
-	        if (Object.keys(defaultTags).length === 0) {
-	            enterSelectMode(node);
-	            return;
-	        }
+	  section.presets = function (val) {
+	    if (!arguments.length) return _presets;
+	    _presets = val;
 
-	        var tags = Object.assign({}, node.tags);  // shallow copy
-	        for (var key in defaultTags) {
-	            tags[key] = defaultTags[key];
-	        }
+	    if (_presets && _presets.length && _presets[0].isFallback()) {
+	      section.disclosureExpanded(true); // don't collapse the disclosure if the mapper used the raw tag editor - #1881
+	    } else if (!_didInteract) {
+	      section.disclosureExpanded(null);
+	    }
 
-	        context.perform(
-	            actionChangeTags(node.id, tags),
-	            _t('operations.add.annotation.point')
-	        );
+	    return section;
+	  };
 
-	        enterSelectMode(node);
-	    }
+	  section.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val;
+	    return section;
+	  };
 
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
 
-	    function cancel() {
-	        context.enter(modeBrowse(context));
+	    if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+	      _entityIDs = val;
+	      _orderedKeys = [];
 	    }
 
+	    return section;
+	  }; // pass an array of regular expressions to test against the tag key
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
 
+	  section.readOnlyTags = function (val) {
+	    if (!arguments.length) return _readOnlyTags;
+	    _readOnlyTags = val;
+	    return section;
+	  };
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	  return utilRebind(section, dispatch, 'on');
+	}
 
+	function uiDataEditor(context) {
+	  var dataHeader = uiDataHeader();
+	  var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context).expandedByDefault(true).readOnlyTags([/./]);
 
-	    return mode;
-	}
+	  var _datum;
 
-	function modeAddNote(context) {
-	    var mode = {
-	        id: 'add-note',
-	        button: 'note',
-	        title: _t('modes.add_note.title'),
-	        description: _t('modes.add_note.description'),
-	        key: _t('modes.add_note.key')
-	    };
+	  function dataEditor(selection) {
+	    var header = selection.selectAll('.header').data([0]);
+	    var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+	      context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h2').call(_t.append('map_data.title'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body);
+	    var editor = body.selectAll('.data-editor').data([0]); // enter/update
 
-	    var behavior = behaviorDraw(context)
-	        .on('click', add)
-	        .on('cancel', cancel)
-	        .on('finish', cancel);
+	    editor.enter().append('div').attr('class', 'modal-section data-editor').merge(editor).call(dataHeader.datum(_datum));
+	    var rte = body.selectAll('.raw-tag-editor').data([0]); // enter/update
 
+	    rte.enter().append('div').attr('class', 'raw-tag-editor data-editor').merge(rte).call(rawTagEditor.tags(_datum && _datum.properties || {}).state('hover').render).selectAll('textarea.tag-text').attr('readonly', true).classed('readonly', true);
+	  }
 
-	    function add(loc) {
-	        var osm = services.osm;
-	        if (!osm) { return; }
+	  dataEditor.datum = function (val) {
+	    if (!arguments.length) return _datum;
+	    _datum = val;
+	    return this;
+	  };
 
-	        var note = osmNote({ loc: loc, status: 'open', comments: [] });
-	        osm.replaceNote(note);
+	  return dataEditor;
+	}
 
-	        // force a reraw (there is no history change that would otherwise do this)
-	        context.map().pan([0,0]);
+	function uiOsmoseDetails(context) {
+	  var _qaItem;
 
-	        context
-	            .selectedNoteID(note.id)
-	            .enter(modeSelectNote(context, note.id).newFeature(true));
-	    }
+	  function issueString(d, type) {
+	    if (!d) return ''; // Issue strings are cached from Osmose API
 
+	    var s = services.osmose.getStrings(d.itemType);
+	    return type in s ? s[type] : '';
+	  }
 
-	    function cancel() {
-	        context.enter(modeBrowse(context));
-	    }
+	  function osmoseDetails(selection) {
+	    var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    details.exit().remove();
+	    var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // Description
 
+	    if (issueString(_qaItem, 'detail')) {
+	      var div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	      div.append('h4').call(_t.append('QA.keepRight.detail_description'));
+	      div.append('p').attr('class', 'qa-details-description-text').html(function (d) {
+	        return issueString(d, 'detail');
+	      }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+	    } // Elements (populated later as data is requested)
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
 
+	    var detailsDiv = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	    var elemsDiv = detailsEnter.append('div').attr('class', 'qa-details-subsection'); // Suggested Fix (mustn't exist for every issue type)
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	    if (issueString(_qaItem, 'fix')) {
+	      var _div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
+	      _div.append('h4').call(_t.append('QA.osmose.fix_title'));
 
-	    return mode;
-	}
+	      _div.append('p').html(function (d) {
+	        return issueString(d, 'fix');
+	      }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+	    } // Common Pitfalls (mustn't exist for every issue type)
 
-	function uiConflicts(context) {
-	    var dispatch$1 = dispatch('cancel', 'save');
-	    var keybinding = utilKeybinding('conflicts');
-	    var _origChanges;
-	    var _conflictList;
-	    var _shownConflictIndex;
 
+	    if (issueString(_qaItem, 'trap')) {
+	      var _div2 = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
-	    function keybindingOn() {
-	        select(document)
-	            .call(keybinding.on('⎋', cancel, true));
-	    }
+	      _div2.append('h4').call(_t.append('QA.osmose.trap_title'));
 
-	    function keybindingOff() {
-	        select(document)
-	            .call(keybinding.unbind);
-	    }
+	      _div2.append('p').html(function (d) {
+	        return issueString(d, 'trap');
+	      }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+	    } // Save current item to check if UI changed by time request resolves
 
-	    function tryAgain() {
-	        keybindingOff();
-	        dispatch$1.call('save');
-	    }
 
-	    function cancel() {
-	        keybindingOff();
-	        dispatch$1.call('cancel');
-	    }
+	    var thisItem = _qaItem;
+	    services.osmose.loadIssueDetail(_qaItem).then(function (d) {
+	      // No details to add if there are no associated issue elements
+	      if (!d.elems || d.elems.length === 0) return; // Do nothing if UI has moved on by the time this resolves
 
+	      if (context.selectedErrorID() !== thisItem.id && context.container().selectAll(".qaItem.osmose.hover.itemId-".concat(thisItem.id)).empty()) return; // Things like keys and values are dynamically added to a subtitle string
 
-	    function conflicts(selection) {
-	        keybindingOn();
+	      if (d.detail) {
+	        detailsDiv.append('h4').call(_t.append('QA.osmose.detail_title'));
+	        detailsDiv.append('p').html(function (d) {
+	          return d.detail;
+	        }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+	      } // Create list of linked issue elements
 
-	        var headerEnter = selection.selectAll('.header')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'header fillL');
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'fr')
-	            .on('click', cancel)
-	            .call(svgIcon('#iD-icon-close'));
+	      elemsDiv.append('h4').call(_t.append('QA.osmose.elems_title'));
+	      elemsDiv.append('ul').selectAll('li').data(d.elems).enter().append('li').append('a').attr('href', '#').attr('class', 'error_entity_link').text(function (d) {
+	        return d;
+	      }).each(function () {
+	        var link = select(this);
+	        var entityID = this.textContent;
+	        var entity = context.hasEntity(entityID); // Add click handler
+
+	        link.on('mouseenter', function () {
+	          utilHighlightEntities([entityID], true, context);
+	        }).on('mouseleave', function () {
+	          utilHighlightEntities([entityID], false, context);
+	        }).on('click', function (d3_event) {
+	          d3_event.preventDefault();
+	          utilHighlightEntities([entityID], false, context);
+	          var osmlayer = context.layers().layer('osm');
+
+	          if (!osmlayer.enabled()) {
+	            osmlayer.enabled(true);
+	          }
 
-	        headerEnter
-	            .append('h3')
-	            .text(_t('save.conflict.header'));
+	          context.map().centerZoom(d.loc, 20);
 
-	        var bodyEnter = selection.selectAll('.body')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'body fillL');
+	          if (entity) {
+	            context.enter(modeSelect(context, [entityID]));
+	          } else {
+	            context.loadEntity(entityID, function (err, result) {
+	              if (err) return;
+	              var entity = result.data.find(function (e) {
+	                return e.id === entityID;
+	              });
+	              if (entity) context.enter(modeSelect(context, [entityID]));
+	            });
+	          }
+	        }); // Replace with friendly name if possible
+	        // (The entity may not yet be loaded into the graph)
 
-	        var conflictsHelpEnter = bodyEnter
-	            .append('div')
-	            .attr('class', 'conflicts-help')
-	            .text(_t('save.conflict.help'));
+	        if (entity) {
+	          var name = utilDisplayName(entity); // try to use common name
 
+	          if (!name) {
+	            var preset = _mainPresetIndex.match(entity, context.graph());
+	            name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+	          }
 
-	        // Download changes link
-	        var detected = utilDetect();
-	        var changeset = new osmChangeset();
+	          if (name) {
+	            this.innerText = name;
+	          }
+	        }
+	      }); // Don't hide entities related to this issue - #5880
 
-	        delete changeset.id;  // Export without changeset_id
+	      context.features().forceVisible(d.elems);
+	      context.map().pan([0, 0]); // trigger a redraw
+	    })["catch"](function (err) {
+	      console.log(err); // eslint-disable-line no-console
+	    });
+	  }
 
-	        var data = JXON.stringify(changeset.osmChangeJXON(_origChanges));
-	        var blob = new Blob([data], { type: 'text/xml;charset=utf-8;' });
-	        var fileName = 'changes.osc';
+	  osmoseDetails.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return osmoseDetails;
+	  };
 
-	        var linkEnter = conflictsHelpEnter.selectAll('.download-changes')
-	            .append('a')
-	            .attr('class', 'download-changes');
+	  return osmoseDetails;
+	}
 
-	        if (detected.download) {      // All except IE11 and Edge
-	            linkEnter                 // download the data as a file
-	                .attr('href', window.URL.createObjectURL(blob))
-	                .attr('download', fileName);
+	function uiOsmoseHeader() {
+	  var _qaItem;
 
-	        } else {                      // IE11 and Edge
-	            linkEnter                 // open data uri in a new tab
-	                .attr('target', '_blank')
-	                .on('click.download', function() {
-	                    navigator.msSaveBlob(blob, fileName);
-	                });
-	        }
+	  function issueTitle(d) {
+	    var unknown = _t('inspector.unknown');
+	    if (!d) return unknown; // Issue titles supplied by Osmose
 
-	        linkEnter
-	            .call(svgIcon('#iD-icon-load', 'inline'))
-	            .append('span')
-	            .text(_t('save.conflict.download_changes'));
+	    var s = services.osmose.getStrings(d.itemType);
+	    return 'title' in s ? s.title : unknown;
+	  }
 
+	  function osmoseHeader(selection) {
+	    var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    header.exit().remove();
+	    var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+	    var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+	      return d.id < 0;
+	    }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
+	      return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+	    });
+	    svgEnter.append('polygon').attr('fill', function (d) {
+	      return services.osmose.getColor(d.item);
+	    }).attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+	    svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
+	      var picon = d.icon;
 
-	        bodyEnter
-	            .append('div')
-	            .attr('class', 'conflict-container fillL3')
-	            .call(showConflict, 0);
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
+	      }
+	    });
+	    headerEnter.append('div').attr('class', 'qa-header-label').text(issueTitle);
+	  }
 
-	        bodyEnter
-	            .append('div')
-	            .attr('class', 'conflicts-done')
-	            .attr('opacity', 0)
-	            .style('display', 'none')
-	            .text(_t('save.conflict.done'));
+	  osmoseHeader.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return osmoseHeader;
+	  };
 
-	        var buttonsEnter = bodyEnter
-	            .append('div')
-	            .attr('class','buttons col12 joined conflicts-buttons');
+	  return osmoseHeader;
+	}
 
-	        buttonsEnter
-	            .append('button')
-	            .attr('disabled', _conflictList.length > 1)
-	            .attr('class', 'action conflicts-button col6')
-	            .text(_t('save.title'))
-	            .on('click.try_again', tryAgain);
+	function uiViewOnOsmose() {
+	  var _qaItem;
+
+	  function viewOnOsmose(selection) {
+	    var url;
 
-	        buttonsEnter
-	            .append('button')
-	            .attr('class', 'secondary-action conflicts-button col6')
-	            .text(_t('confirm.cancel'))
-	            .on('click.cancel', cancel);
+	    if (services.osmose && _qaItem instanceof QAItem) {
+	      url = services.osmose.itemURL(_qaItem);
 	    }
 
+	    var link = selection.selectAll('.view-on-osmose').data(url ? [url] : []); // exit
 
-	    function showConflict(selection, index) {
-	        index = utilWrap(index, _conflictList.length);
-	        _shownConflictIndex = index;
+	    link.exit().remove(); // enter
 
-	        var parent = select(selection.node().parentNode);
+	    var linkEnter = link.enter().append('a').attr('class', 'view-on-osmose').attr('target', '_blank').attr('rel', 'noopener') // security measure
+	    .attr('href', function (d) {
+	      return d;
+	    }).call(svgIcon('#iD-icon-out-link', 'inline'));
+	    linkEnter.append('span').call(_t.append('inspector.view_on_osmose'));
+	  }
 
-	        // enable save button if this is the last conflict being reviewed..
-	        if (index === _conflictList.length - 1) {
-	            window.setTimeout(function() {
-	                parent.select('.conflicts-button')
-	                    .attr('disabled', null);
+	  viewOnOsmose.what = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return viewOnOsmose;
+	  };
 
-	                parent.select('.conflicts-done')
-	                    .transition()
-	                    .attr('opacity', 1)
-	                    .style('display', 'block');
-	            }, 250);
-	        }
+	  return viewOnOsmose;
+	}
 
-	        var conflict = selection
-	            .selectAll('.conflict')
-	            .data([_conflictList[index]]);
+	function uiOsmoseEditor(context) {
+	  var dispatch = dispatch$8('change');
+	  var qaDetails = uiOsmoseDetails(context);
+	  var qaHeader = uiOsmoseHeader();
 
-	        conflict.exit()
-	            .remove();
+	  var _qaItem;
 
-	        var conflictEnter = conflict.enter()
-	            .append('div')
-	            .attr('class', 'conflict');
-
-	        conflictEnter
-	            .append('h4')
-	            .attr('class', 'conflict-count')
-	            .text(_t('save.conflict.count', { num: index + 1, total: _conflictList.length }));
-
-	        conflictEnter
-	            .append('a')
-	            .attr('class', 'conflict-description')
-	            .attr('href', '#')
-	            .text(function(d) { return d.name; })
-	            .on('click', function(d) {
-	                event.preventDefault();
-	                zoomToEntity(d.id);
-	            });
+	  function osmoseEditor(selection) {
+	    var header = selection.selectAll('.header').data([0]);
+	    var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+	      return context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h2').call(_t.append('QA.osmose.title'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body);
+	    var editor = body.selectAll('.qa-editor').data([0]);
+	    editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(osmoseSaveSection);
+	    var footer = selection.selectAll('.footer').data([0]);
+	    footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnOsmose().what(_qaItem));
+	  }
 
-	        var details = conflictEnter
-	            .append('div')
-	            .attr('class', 'conflict-detail-container');
+	  function osmoseSaveSection(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	        details
-	            .append('ul')
-	            .attr('class', 'conflict-detail-list')
-	            .selectAll('li')
-	            .data(function(d) { return d.details || []; })
-	            .enter()
-	            .append('li')
-	            .attr('class', 'conflict-detail-item')
-	            .html(function(d) { return d; });
+	    var isShown = _qaItem && isSelected;
+	    var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    }); // exit
 
-	        details
-	            .append('div')
-	            .attr('class', 'conflict-choices')
-	            .call(addChoices);
+	    saveSection.exit().remove(); // enter
 
-	        details
-	            .append('div')
-	            .attr('class', 'conflict-nav-buttons joined cf')
-	            .selectAll('button')
-	            .data(['previous', 'next'])
-	            .enter()
-	            .append('button')
-	            .text(function(d) { return _t('save.conflict.' + d); })
-	            .attr('class', 'conflict-nav-button action col6')
-	            .attr('disabled', function(d, i) {
-	                return (i === 0 && index === 0) ||
-	                    (i === 1 && index === _conflictList.length - 1) || null;
-	            })
-	            .on('click', function(d, i) {
-	                event.preventDefault();
-
-	                var container = parent.selectAll('.conflict-container');
-	                var sign = (i === 0 ? -1 : 1);
-
-	                container
-	                    .selectAll('.conflict')
-	                    .remove();
-
-	                container
-	                    .call(showConflict, index + sign);
-	            });
+	    var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf'); // update
 
-	    }
+	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
+	  }
 
+	  function qaSaveButtons(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	    function addChoices(selection) {
-	        var choices = selection
-	            .append('ul')
-	            .attr('class', 'layer-list')
-	            .selectAll('li')
-	            .data(function(d) { return d.choices || []; });
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	        // enter
-	        var choicesEnter = choices.enter()
-	            .append('li')
-	            .attr('class', 'layer');
+	    buttonSection.exit().remove(); // enter
 
-	        var labelEnter = choicesEnter
-	            .append('label');
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+	    buttonEnter.append('button').attr('class', 'button close-button action');
+	    buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'radio')
-	            .attr('name', function(d) { return d.id; })
-	            .on('change', function(d, i) {
-	                var ul = this.parentNode.parentNode.parentNode;
-	                ul.__data__.chosen = i;
-	                choose(ul, d);
-	            });
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.select('.close-button').call(_t.append('QA.keepRight.close')).on('click.close', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) { return d.text; });
-
-	        // update
-	        choicesEnter
-	            .merge(choices)
-	            .each(function(d, i) {
-	                var ul = this.parentNode;
-	                if (ul.__data__.chosen === i) {
-	                    choose(ul, d);
-	                }
-	            });
-	    }
+	      var qaService = services.osmose;
+
+	      if (qaService) {
+	        d.newStatus = 'done';
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
+	    });
+	    buttonSection.select('.ignore-button').call(_t.append('QA.keepRight.ignore')).on('click.ignore', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
+	      var qaService = services.osmose;
 
-	    function choose(ul, datum) {
-	        if (event) { event.preventDefault(); }
+	      if (qaService) {
+	        d.newStatus = 'false';
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch.call('change', item);
+	        });
+	      }
+	    });
+	  } // NOTE: Don't change method name until UI v3 is merged
 
-	        select(ul)
-	            .selectAll('li')
-	            .classed('active', function(d) { return d === datum; })
-	            .selectAll('input')
-	            .property('checked', function(d) { return d === datum; });
 
-	        var extent = geoExtent();
-	        var entity;
+	  osmoseEditor.error = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return osmoseEditor;
+	  };
 
-	        entity = context.graph().hasEntity(datum.id);
-	        if (entity) { extent._extend(entity.extent(context.graph())); }
+	  return utilRebind(osmoseEditor, dispatch, 'on');
+	}
 
-	        datum.action();
+	function uiSidebar(context) {
+	  var inspector = uiInspector(context);
+	  var dataEditor = uiDataEditor(context);
+	  var noteEditor = uiNoteEditor(context);
+	  var improveOsmEditor = uiImproveOsmEditor(context);
+	  var keepRightEditor = uiKeepRightEditor(context);
+	  var osmoseEditor = uiOsmoseEditor(context);
 
-	        entity = context.graph().hasEntity(datum.id);
-	        if (entity) { extent._extend(entity.extent(context.graph())); }
+	  var _current;
 
-	        zoomToEntity(datum.id, extent);
-	    }
+	  var _wasData = false;
+	  var _wasNote = false;
+	  var _wasQaItem = false; // use pointer events on supported platforms; fallback to mouse events
 
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	    function zoomToEntity(id, extent) {
-	        context.surface().selectAll('.hover')
-	            .classed('hover', false);
+	  function sidebar(selection) {
+	    var container = context.container();
+	    var minWidth = 240;
+	    var sidebarWidth;
+	    var containerWidth;
+	    var dragOffset; // Set the initial width constraints
+
+	    selection.style('min-width', minWidth + 'px').style('max-width', '400px').style('width', '33.3333%');
+	    var resizer = selection.append('div').attr('class', 'sidebar-resizer').on(_pointerPrefix + 'down.sidebar-resizer', pointerdown);
+	    var downPointerId, lastClientX, containerLocGetter;
+
+	    function pointerdown(d3_event) {
+	      if (downPointerId) return;
+	      if ('button' in d3_event && d3_event.button !== 0) return;
+	      downPointerId = d3_event.pointerId || 'mouse';
+	      lastClientX = d3_event.clientX;
+	      containerLocGetter = utilFastMouse(container.node()); // offset from edge of sidebar-resizer
+
+	      dragOffset = utilFastMouse(resizer.node())(d3_event)[0] - 1;
+	      sidebarWidth = selection.node().getBoundingClientRect().width;
+	      containerWidth = container.node().getBoundingClientRect().width;
+	      var widthPct = sidebarWidth / containerWidth * 100;
+	      selection.style('width', widthPct + '%') // lock in current width
+	      .style('max-width', '85%'); // but allow larger widths
+
+	      resizer.classed('dragging', true);
+	      select(window).on('touchmove.sidebar-resizer', function (d3_event) {
+	        // disable page scrolling while resizing on touch input
+	        d3_event.preventDefault();
+	      }, {
+	        passive: false
+	      }).on(_pointerPrefix + 'move.sidebar-resizer', pointermove).on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', pointerup);
+	    }
+
+	    function pointermove(d3_event) {
+	      if (downPointerId !== (d3_event.pointerId || 'mouse')) return;
+	      d3_event.preventDefault();
+	      var dx = d3_event.clientX - lastClientX;
+	      lastClientX = d3_event.clientX;
+	      var isRTL = _mainLocalizer.textDirection() === 'rtl';
+	      var scaleX = isRTL ? 0 : 1;
+	      var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+	      var x = containerLocGetter(d3_event)[0] - dragOffset;
+	      sidebarWidth = isRTL ? containerWidth - x : x;
+	      var isCollapsed = selection.classed('collapsed');
+	      var shouldCollapse = sidebarWidth < minWidth;
+	      selection.classed('collapsed', shouldCollapse);
+
+	      if (shouldCollapse) {
+	        if (!isCollapsed) {
+	          selection.style(xMarginProperty, '-400px').style('width', '400px');
+	          context.ui().onResize([(sidebarWidth - dx) * scaleX, 0]);
+	        }
+	      } else {
+	        var widthPct = sidebarWidth / containerWidth * 100;
+	        selection.style(xMarginProperty, null).style('width', widthPct + '%');
 
-	        var entity = context.graph().hasEntity(id);
-	        if (entity) {
-	            if (extent) {
-	                context.map().trimmedExtent(extent);
-	            } else {
-	                context.map().zoomToEase(entity);
-	            }
-	            context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph()))
-	                .classed('hover', true);
+	        if (isCollapsed) {
+	          context.ui().onResize([-sidebarWidth * scaleX, 0]);
+	        } else {
+	          context.ui().onResize([-dx * scaleX, 0]);
 	        }
+	      }
 	    }
 
+	    function pointerup(d3_event) {
+	      if (downPointerId !== (d3_event.pointerId || 'mouse')) return;
+	      downPointerId = null;
+	      resizer.classed('dragging', false);
+	      select(window).on('touchmove.sidebar-resizer', null).on(_pointerPrefix + 'move.sidebar-resizer', null).on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', null);
+	    }
 
-	    // The conflict list should be an array of objects like:
-	    // {
-	    //     id: id,
-	    //     name: entityName(local),
-	    //     details: merge.conflicts(),
-	    //     chosen: 1,
-	    //     choices: [
-	    //         choice(id, keepMine, forceLocal),
-	    //         choice(id, keepTheirs, forceRemote)
-	    //     ]
-	    // }
-	    conflicts.conflictList = function(_) {
-	        if (!arguments.length) { return _conflictList; }
-	        _conflictList = _;
-	        return conflicts;
-	    };
-
+	    var featureListWrap = selection.append('div').attr('class', 'feature-list-pane').call(uiFeatureList(context));
+	    var inspectorWrap = selection.append('div').attr('class', 'inspector-hidden inspector-wrap');
 
-	    conflicts.origChanges = function(_) {
-	        if (!arguments.length) { return _origChanges; }
-	        _origChanges = _;
-	        return conflicts;
-	    };
+	    var hoverModeSelect = function hoverModeSelect(targets) {
+	      context.container().selectAll('.feature-list-item button').classed('hover', false);
 
+	      if (context.selectedIDs().length > 1 && targets && targets.length) {
+	        var elements = context.container().selectAll('.feature-list-item button').filter(function (node) {
+	          return targets.indexOf(node) !== -1;
+	        });
 
-	    conflicts.shownEntityIds = function() {
-	        if (_conflictList && typeof _shownConflictIndex === 'number') {
-	            return [_conflictList[_shownConflictIndex].id];
+	        if (!elements.empty()) {
+	          elements.classed('hover', true);
 	        }
-	        return [];
+	      }
 	    };
 
+	    sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
 
-	    return utilRebind(conflicts, dispatch$1, 'on');
-	}
+	    function hover(targets) {
+	      var datum = targets && targets.length && targets[0];
 
-	function uiConfirm(selection) {
-	    var modalSelection = uiModal(selection);
+	      if (datum && datum.__featurehash__) {
+	        // hovering on data
+	        _wasData = true;
+	        sidebar.show(dataEditor.datum(datum));
+	        selection.selectAll('.sidebar-component').classed('inspector-hover', true);
+	      } else if (datum instanceof osmNote) {
+	        if (context.mode().id === 'drag-note') return;
+	        _wasNote = true;
+	        var osm = services.osm;
 
-	    modalSelection.select('.modal')
-	        .classed('modal-alert', true);
+	        if (osm) {
+	          datum = osm.getNote(datum.id); // marker may contain stale data - get latest
+	        }
 
-	    var section = modalSelection.select('.content');
+	        sidebar.show(noteEditor.note(datum));
+	        selection.selectAll('.sidebar-component').classed('inspector-hover', true);
+	      } else if (datum instanceof QAItem) {
+	        _wasQaItem = true;
+	        var errService = services[datum.service];
 
-	    section.append('div')
-	        .attr('class', 'modal-section header');
+	        if (errService) {
+	          // marker may contain stale data - get latest
+	          datum = errService.getError(datum.id);
+	        } // Currently only three possible services
 
-	    section.append('div')
-	        .attr('class', 'modal-section message-text');
 
-	    var buttons = section.append('div')
-	        .attr('class', 'modal-section buttons cf');
+	        var errEditor;
 
+	        if (datum.service === 'keepRight') {
+	          errEditor = keepRightEditor;
+	        } else if (datum.service === 'osmose') {
+	          errEditor = osmoseEditor;
+	        } else {
+	          errEditor = improveOsmEditor;
+	        }
 
-	    modalSelection.okButton = function() {
-	        buttons
-	            .append('button')
-	            .attr('class', 'button ok-button action')
-	            .on('click.confirm', function() {
-	                modalSelection.remove();
-	            })
-	            .text(_t('confirm.okay'))
-	            .node()
-	            .focus();
+	        context.container().selectAll('.qaItem.' + datum.service).classed('hover', function (d) {
+	          return d.id === datum.id;
+	        });
+	        sidebar.show(errEditor.error(datum));
+	        selection.selectAll('.sidebar-component').classed('inspector-hover', true);
+	      } else if (!_current && datum instanceof osmEntity) {
+	        featureListWrap.classed('inspector-hidden', true);
+	        inspectorWrap.classed('inspector-hidden', false).classed('inspector-hover', true);
+
+	        if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), [datum.id]) || inspector.state() !== 'hover') {
+	          inspector.state('hover').entityIDs([datum.id]).newFeature(false);
+	          inspectorWrap.call(inspector);
+	        }
+	      } else if (!_current) {
+	        featureListWrap.classed('inspector-hidden', false);
+	        inspectorWrap.classed('inspector-hidden', true);
+	        inspector.state('hide');
+	      } else if (_wasData || _wasNote || _wasQaItem) {
+	        _wasNote = false;
+	        _wasData = false;
+	        _wasQaItem = false;
+	        context.container().selectAll('.note').classed('hover', false);
+	        context.container().selectAll('.qaItem').classed('hover', false);
+	        sidebar.hide();
+	      }
+	    }
 
-	        return modalSelection;
-	    };
+	    sidebar.hover = throttle(hover, 200);
 
+	    sidebar.intersects = function (extent) {
+	      var rect = selection.node().getBoundingClientRect();
+	      return extent.intersects([context.projection.invert([0, rect.height]), context.projection.invert([rect.width, 0])]);
+	    };
 
-	    return modalSelection;
-	}
+	    sidebar.select = function (ids, newFeature) {
+	      sidebar.hide();
 
-	function uiChangesetEditor(context) {
-	    var dispatch$1 = dispatch('change');
-	    var formFields = uiFormFields(context);
-	    var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);
-	    var _fieldsArr;
-	    var _tags;
-	    var _changesetID;
+	      if (ids && ids.length) {
+	        var entity = ids.length === 1 && context.entity(ids[0]);
 
+	        if (entity && newFeature && selection.classed('collapsed')) {
+	          // uncollapse the sidebar
+	          var extent = entity.extent(context.graph());
+	          sidebar.expand(sidebar.intersects(extent));
+	        }
 
-	    function changesetEditor(selection) {
-	        render(selection);
-	    }
+	        featureListWrap.classed('inspector-hidden', true);
+	        inspectorWrap.classed('inspector-hidden', false).classed('inspector-hover', false); // reload the UI even if the ids are the same since the entities
+	        // themselves may have changed
 
+	        inspector.state('select').entityIDs(ids).newFeature(newFeature);
+	        inspectorWrap.call(inspector);
+	      } else {
+	        inspector.state('hide');
+	      }
+	    };
 
-	    function render(selection) {
-	        var initial = false;
+	    sidebar.showPresetList = function () {
+	      inspector.showList();
+	    };
 
-	        if (!_fieldsArr) {
-	            initial = true;
-	            var presets = _mainPresetIndex;
+	    sidebar.show = function (component, element) {
+	      featureListWrap.classed('inspector-hidden', true);
+	      inspectorWrap.classed('inspector-hidden', true);
+	      if (_current) _current.remove();
+	      _current = selection.append('div').attr('class', 'sidebar-component').call(component, element);
+	    };
 
-	            _fieldsArr = [
-	                uiField(context, presets.field('comment'), null, { show: true, revert: false }),
-	                uiField(context, presets.field('source'), null, { show: false, revert: false }),
-	                uiField(context, presets.field('hashtags'), null, { show: false, revert: false }) ];
+	    sidebar.hide = function () {
+	      featureListWrap.classed('inspector-hidden', false);
+	      inspectorWrap.classed('inspector-hidden', true);
+	      if (_current) _current.remove();
+	      _current = null;
+	    };
 
-	            _fieldsArr.forEach(function(field) {
-	                field
-	                    .on('change', function(t, onInput) {
-	                        dispatch$1.call('change', field, undefined, t, onInput);
-	                    });
-	            });
-	        }
+	    sidebar.expand = function (moveMap) {
+	      if (selection.classed('collapsed')) {
+	        sidebar.toggle(moveMap);
+	      }
+	    };
 
-	        _fieldsArr.forEach(function(field) {
-	            field
-	                .tags(_tags);
-	        });
+	    sidebar.collapse = function (moveMap) {
+	      if (!selection.classed('collapsed')) {
+	        sidebar.toggle(moveMap);
+	      }
+	    };
 
+	    sidebar.toggle = function (moveMap) {
+	      // Don't allow sidebar to toggle when the user is in the walkthrough.
+	      if (context.inIntro()) return;
+	      var isCollapsed = selection.classed('collapsed');
+	      var isCollapsing = !isCollapsed;
+	      var isRTL = _mainLocalizer.textDirection() === 'rtl';
+	      var scaleX = isRTL ? 0 : 1;
+	      var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+	      sidebarWidth = selection.node().getBoundingClientRect().width; // switch from % to px
 
-	        selection
-	            .call(formFields.fieldsArr(_fieldsArr));
+	      selection.style('width', sidebarWidth + 'px');
+	      var startMargin, endMargin, lastMargin;
 
+	      if (isCollapsing) {
+	        startMargin = lastMargin = 0;
+	        endMargin = -sidebarWidth;
+	      } else {
+	        startMargin = lastMargin = -sidebarWidth;
+	        endMargin = 0;
+	      }
 
-	        if (initial) {
-	            var commentField = selection.select('.form-field-comment textarea');
-	            var commentNode = commentField.node();
+	      if (!isCollapsing) {
+	        // unhide the sidebar's content before it transitions onscreen
+	        selection.classed('collapsed', isCollapsing);
+	      }
 
-	            if (commentNode) {
-	                commentNode.focus();
-	                commentNode.select();
-	            }
+	      selection.transition().style(xMarginProperty, endMargin + 'px').tween('panner', function () {
+	        var i = d3_interpolateNumber(startMargin, endMargin);
+	        return function (t) {
+	          var dx = lastMargin - Math.round(i(t));
+	          lastMargin = lastMargin - dx;
+	          context.ui().onResize(moveMap ? undefined : [dx * scaleX, 0]);
+	        };
+	      }).on('end', function () {
+	        if (isCollapsing) {
+	          // hide the sidebar's content after it transitions offscreen
+	          selection.classed('collapsed', isCollapsing);
+	        } // switch back from px to %
 
-	            // trigger a 'blur' event so that comment field can be cleaned
-	            // and checked for hashtags, even if retrieved from localstorage
-	            utilTriggerEvent(commentField, 'blur');
 
-	            var osm = context.connection();
-	            if (osm) {
-	                osm.userChangesets(function (err, changesets) {
-	                    if (err) { return; }
-
-	                    var comments = changesets.map(function(changeset) {
-	                        var comment = changeset.tags.comment;
-	                        return comment ? { title: comment, value: comment } : null;
-	                    }).filter(Boolean);
-
-	                    commentField
-	                        .call(commentCombo
-	                            .data(utilArrayUniqBy(comments, 'title'))
-	                        );
-	                });
-	            }
+	        if (!isCollapsing) {
+	          var containerWidth = container.node().getBoundingClientRect().width;
+	          var widthPct = sidebarWidth / containerWidth * 100;
+	          selection.style(xMarginProperty, null).style('width', widthPct + '%');
 	        }
+	      });
+	    }; // toggle the sidebar collapse when double-clicking the resizer
 
-	        // Add warning if comment mentions Google
-	        var hasGoogle = _tags.comment.match(/google/i);
-	        var commentWarning = selection.select('.form-field-comment').selectAll('.comment-warning')
-	            .data(hasGoogle ? [0] : []);
 
-	        commentWarning.exit()
-	            .transition()
-	            .duration(200)
-	            .style('opacity', 0)
-	            .remove();
+	    resizer.on('dblclick', function (d3_event) {
+	      d3_event.preventDefault();
 
-	        var commentEnter = commentWarning.enter()
-	            .insert('div', '.tag-reference-body')
-	            .attr('class', 'field-warning comment-warning')
-	            .style('opacity', 0);
+	      if (d3_event.sourceEvent) {
+	        d3_event.sourceEvent.preventDefault();
+	      }
 
-	        commentEnter
-	            .append('a')
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-alert', 'inline'))
-	            .attr('href', _t('commit.google_warning_link'))
-	            .append('span')
-	            .text(_t('commit.google_warning'));
+	      sidebar.toggle();
+	    }); // ensure hover sidebar is closed when zooming out beyond editable zoom
 
-	        commentEnter
-	            .transition()
-	            .duration(200)
-	            .style('opacity', 1);
-	    }
+	    context.map().on('crossEditableZoom.sidebar', function (within) {
+	      if (!within && !selection.select('.inspector-hover').empty()) {
+	        hover([]);
+	      }
+	    });
+	  }
 
+	  sidebar.showPresetList = function () {};
 
-	    changesetEditor.tags = function(_) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = _;
-	        // Don't reset _fieldsArr here.
-	        return changesetEditor;
-	    };
+	  sidebar.hover = function () {};
 
+	  sidebar.hover.cancel = function () {};
 
-	    changesetEditor.changesetID = function(_) {
-	        if (!arguments.length) { return _changesetID; }
-	        if (_changesetID === _) { return changesetEditor; }
-	        _changesetID = _;
-	        _fieldsArr = null;
-	        return changesetEditor;
-	    };
+	  sidebar.intersects = function () {};
 
+	  sidebar.select = function () {};
 
-	    return utilRebind(changesetEditor, dispatch$1, 'on');
-	}
+	  sidebar.show = function () {};
 
-	function uiSectionChanges(context) {
-	    var detected = utilDetect();
+	  sidebar.hide = function () {};
 
-	    var _discardTags = {};
-	    _mainFileFetcher.get('discarded')
-	        .then(function(d) { _discardTags = d; })
-	        .catch(function() { /* ignore */ });
+	  sidebar.expand = function () {};
 
-	    var section = uiSection('changes-list', context)
-	        .title(function() {
-	            var history = context.history();
-	            var summary = history.difference().summary();
-	            return _t('commit.changes', { count: summary.length });
-	        })
-	        .disclosureContent(renderDisclosureContent);
+	  sidebar.collapse = function () {};
 
-	    function renderDisclosureContent(selection) {
-	        var history = context.history();
-	        var summary = history.difference().summary();
+	  sidebar.toggle = function () {};
 
-	        var container = selection.selectAll('.commit-section')
-	            .data([0]);
+	  return sidebar;
+	}
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'commit-section');
+	function modeDrawArea(context, wayID, startGraph, button) {
+	  var mode = {
+	    button: button,
+	    id: 'draw-area'
+	  };
+	  var behavior = behaviorDrawWay(context, wayID, mode, startGraph).on('rejectedSelfIntersection.modeDrawArea', function () {
+	    context.ui().flash.iconName('#iD-icon-no').label(_t.html('self_intersection.error.areas'))();
+	  });
+	  mode.wayID = wayID;
 
-	        containerEnter
-	            .append('ul')
-	            .attr('class', 'changeset-list');
+	  mode.enter = function () {
+	    context.install(behavior);
+	  };
 
-	        container = containerEnter
-	            .merge(container);
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
+	  mode.selectedIDs = function () {
+	    return [wayID];
+	  };
 
-	        var items = container.select('ul').selectAll('li')
-	            .data(summary);
+	  mode.activeID = function () {
+	    return behavior && behavior.activeID() || [];
+	  };
 
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', 'change-item');
+	  return mode;
+	}
 
-	        itemsEnter
-	            .each(function(d) {
-	                select(this)
-	                    .call(svgIcon('#iD-icon-' + d.entity.geometry(d.graph), 'pre-text ' + d.changeType));
-	            });
+	function modeAddArea(context, mode) {
+	  mode.id = 'add-area';
+	  var behavior = behaviorAddWay(context).on('start', start).on('startFromWay', startFromWay).on('startFromNode', startFromNode);
+	  var defaultTags = {
+	    area: 'yes'
+	  };
+	  if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'area');
 
-	        itemsEnter
-	            .append('span')
-	            .attr('class', 'change-type')
-	            .text(function(d) { return _t('commit.' + d.changeType) + ' '; });
-
-	        itemsEnter
-	            .append('strong')
-	            .attr('class', 'entity-type')
-	            .text(function(d) {
-	                var matched = _mainPresetIndex.match(d.entity, d.graph);
-	                return (matched && matched.name()) || utilDisplayType(d.entity.id);
-	            });
+	  function actionClose(wayId) {
+	    return function (graph) {
+	      return graph.replace(graph.entity(wayId).close());
+	    };
+	  }
 
-	        itemsEnter
-	            .append('span')
-	            .attr('class', 'entity-name')
-	            .text(function(d) {
-	                var name = utilDisplayName(d.entity) || '',
-	                    string = '';
-	                if (name !== '') {
-	                    string += ':';
-	                }
-	                return string += ' ' + name;
-	            });
+	  function start(loc) {
+	    var startGraph = context.graph();
+	    var node = osmNode({
+	      loc: loc
+	    });
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id));
+	    context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	  }
 
-	        itemsEnter
-	            .style('opacity', 0)
-	            .transition()
-	            .style('opacity', 1);
+	  function startFromWay(loc, edge) {
+	    var startGraph = context.graph();
+	    var node = osmNode({
+	      loc: loc
+	    });
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id), actionAddMidpoint({
+	      loc: loc,
+	      edge: edge
+	    }, node));
+	    context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	  }
 
-	        items = itemsEnter
-	            .merge(items);
+	  function startFromNode(node) {
+	    var startGraph = context.graph();
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id));
+	    context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	  }
 
-	        items
-	            .on('mouseover', mouseover)
-	            .on('mouseout', mouseout)
-	            .on('click', click);
+	  mode.enter = function () {
+	    context.install(behavior);
+	  };
 
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	        // Download changeset link
-	        var changeset = new osmChangeset().update({ id: undefined });
-	        var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+	  return mode;
+	}
 
-	        delete changeset.id;  // Export without chnageset_id
+	function modeAddLine(context, mode) {
+	  mode.id = 'add-line';
+	  var behavior = behaviorAddWay(context).on('start', start).on('startFromWay', startFromWay).on('startFromNode', startFromNode);
+	  var defaultTags = {};
+	  if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'line');
+
+	  function start(loc) {
+	    var startGraph = context.graph();
+	    var node = osmNode({
+	      loc: loc
+	    });
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id));
+	    context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+	  }
 
-	        var data = JXON.stringify(changeset.osmChangeJXON(changes));
-	        var blob = new Blob([data], {type: 'text/xml;charset=utf-8;'});
-	        var fileName = 'changes.osc';
+	  function startFromWay(loc, edge) {
+	    var startGraph = context.graph();
+	    var node = osmNode({
+	      loc: loc
+	    });
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionAddMidpoint({
+	      loc: loc,
+	      edge: edge
+	    }, node));
+	    context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+	  }
 
-	        var linkEnter = container.selectAll('.download-changes')
-	            .data([0])
-	            .enter()
-	            .append('a')
-	            .attr('class', 'download-changes');
-
-	        if (detected.download) {      // All except IE11 and Edge
-	            linkEnter                 // download the data as a file
-	                .attr('href', window.URL.createObjectURL(blob))
-	                .attr('download', fileName);
-
-	        } else {                      // IE11 and Edge
-	            linkEnter                 // open data uri in a new tab
-	                .attr('target', '_blank')
-	                .on('click.download', function() {
-	                    navigator.msSaveBlob(blob, fileName);
-	                });
-	        }
+	  function startFromNode(node) {
+	    var startGraph = context.graph();
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(way), actionAddVertex(way.id, node.id));
+	    context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+	  }
 
-	        linkEnter
-	            .call(svgIcon('#iD-icon-load', 'inline'))
-	            .append('span')
-	            .text(_t('commit.download_changes'));
+	  mode.enter = function () {
+	    context.install(behavior);
+	  };
 
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	        function mouseover(d) {
-	            if (d.entity) {
-	                context.surface().selectAll(
-	                    utilEntityOrMemberSelector([d.entity.id], context.graph())
-	                ).classed('hover', true);
-	            }
-	        }
+	  return mode;
+	}
 
+	function modeAddPoint(context, mode) {
+	  mode.id = 'add-point';
+	  var behavior = behaviorDraw(context).on('click', add).on('clickWay', addWay).on('clickNode', addNode).on('cancel', cancel).on('finish', cancel);
+	  var defaultTags = {};
+	  if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'point');
+
+	  function add(loc) {
+	    var node = osmNode({
+	      loc: loc,
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(node), _t('operations.add.annotation.point'));
+	    enterSelectMode(node);
+	  }
 
-	        function mouseout() {
-	            context.surface().selectAll('.hover')
-	                .classed('hover', false);
-	        }
+	  function addWay(loc, edge) {
+	    var node = osmNode({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddMidpoint({
+	      loc: loc,
+	      edge: edge
+	    }, node), _t('operations.add.annotation.vertex'));
+	    enterSelectMode(node);
+	  }
 
+	  function enterSelectMode(node) {
+	    context.enter(modeSelect(context, [node.id]).newFeature(true));
+	  }
 
-	        function click(change) {
-	            if (change.changeType !== 'deleted') {
-	                var entity = change.entity;
-	                context.map().zoomToEase(entity);
-	                context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph()))
-	                    .classed('hover', true);
-	            }
-	        }
+	  function addNode(node) {
+	    if (Object.keys(defaultTags).length === 0) {
+	      enterSelectMode(node);
+	      return;
 	    }
 
-	    return section;
-	}
-
-	function uiCommitWarnings(context) {
+	    var tags = Object.assign({}, node.tags); // shallow copy
 
-	    function commitWarnings(selection) {
-	        var issuesBySeverity = context.validator()
-	            .getIssuesBySeverity({ what: 'edited', where: 'all', includeDisabledRules: true });
+	    for (var key in defaultTags) {
+	      tags[key] = defaultTags[key];
+	    }
 
-	        for (var severity in issuesBySeverity) {
-	            var issues = issuesBySeverity[severity];
-	            var section = severity + '-section';
-	            var issueItem = severity + '-item';
+	    context.perform(actionChangeTags(node.id, tags), _t('operations.add.annotation.point'));
+	    enterSelectMode(node);
+	  }
 
-	            var container = selection.selectAll('.' + section)
-	                .data(issues.length ? [0] : []);
+	  function cancel() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	            container.exit()
-	                .remove();
+	  mode.enter = function () {
+	    context.install(behavior);
+	  };
 
-	            var containerEnter = container.enter()
-	                .append('div')
-	                .attr('class', 'modal-section ' + section + ' fillL2');
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	            containerEnter
-	                .append('h3')
-	                .text(severity === 'warning' ? _t('commit.warnings') : _t('commit.errors'));
+	  return mode;
+	}
 
-	            containerEnter
-	                .append('ul')
-	                .attr('class', 'changeset-list');
+	function modeSelectNote(context, selectedNoteID) {
+	  var mode = {
+	    id: 'select-note',
+	    button: 'browse'
+	  };
 
-	            container = containerEnter
-	                .merge(container);
+	  var _keybinding = utilKeybinding('select-note');
 
+	  var _noteEditor = uiNoteEditor(context).on('change', function () {
+	    context.map().pan([0, 0]); // trigger a redraw
 
-	            var items = container.select('ul').selectAll('li')
-	                .data(issues, function(d) { return d.id; });
+	    var note = checkSelectedID();
+	    if (!note) return;
+	    context.ui().sidebar.show(_noteEditor.note(note));
+	  });
 
-	            items.exit()
-	                .remove();
+	  var _behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+	  var _newFeature = false;
 
-	            var itemsEnter = items.enter()
-	                .append('li')
-	                .attr('class', issueItem);
+	  function checkSelectedID() {
+	    if (!services.osm) return;
+	    var note = services.osm.getNote(selectedNoteID);
 
-	            itemsEnter
-	                .call(svgIcon('#iD-icon-alert', 'pre-text'));
+	    if (!note) {
+	      context.enter(modeBrowse(context));
+	    }
 
-	            itemsEnter
-	                .append('strong')
-	                .attr('class', 'issue-message');
+	    return note;
+	  } // class the note as selected, or return to browse mode if the note is gone
 
-	            itemsEnter.filter(function(d) { return d.tooltip; })
-	                .call(uiTooltip()
-	                    .title(function(d) { return d.tooltip; })
-	                    .placement('top')
-	                );
 
-	            items = itemsEnter
-	                .merge(items);
+	  function selectNote(d3_event, drawn) {
+	    if (!checkSelectedID()) return;
+	    var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
 
-	            items.selectAll('.issue-message')
-	                .text(function(d) {
-	                    return d.message(context);
-	                });
+	    if (selection.empty()) {
+	      // Return to browse mode if selected DOM elements have
+	      // disappeared because the user moved them out of view..
+	      var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;
 
-	            items
-	                .on('mouseover', function(d) {
-	                    if (d.entityIds) {
-	                        context.surface().selectAll(
-	                            utilEntityOrMemberSelector(
-	                                d.entityIds,
-	                                context.graph()
-	                            )
-	                        ).classed('hover', true);
-	                    }
-	                })
-	                .on('mouseout', function() {
-	                    context.surface().selectAll('.hover')
-	                        .classed('hover', false);
-	                })
-	                .on('click', function(d) {
-	                    context.validator().focusIssue(d);
-	                });
-	        }
+	      if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+	        context.enter(modeBrowse(context));
+	      }
+	    } else {
+	      selection.classed('selected', true);
+	      context.selectedNoteID(selectedNoteID);
 	    }
+	  }
 
+	  function esc() {
+	    if (context.container().select('.combobox').size()) return;
+	    context.enter(modeBrowse(context));
+	  }
 
-	    return commitWarnings;
-	}
-
-	var readOnlyTags = [
-	    /^changesets_count$/,
-	    /^created_by$/,
-	    /^ideditor:/,
-	    /^imagery_used$/,
-	    /^host$/,
-	    /^locale$/,
-	    /^warnings:/,
-	    /^resolved:/,
-	    /^closed:note$/,
-	    /^closed:keepright$/,
-	    /^closed:improveosm:/,
-	    /^closed:osmose:/
-	];
+	  mode.zoomToSelected = function () {
+	    if (!services.osm) return;
+	    var note = services.osm.getNote(selectedNoteID);
 
-	// treat most punctuation (except -, _, +, &) as hashtag delimiters - #4398
-	// from https://stackoverflow.com/a/25575009
-	var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
+	    if (note) {
+	      context.map().centerZoomEase(note.loc, 20);
+	    }
+	  };
 
+	  mode.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return mode;
+	  };
 
-	function uiCommit(context) {
-	    var dispatch$1 = dispatch('cancel');
-	    var _userDetails;
-	    var _selection;
+	  mode.enter = function () {
+	    var note = checkSelectedID();
+	    if (!note) return;
 
-	    var changesetEditor = uiChangesetEditor(context)
-	        .on('change', changeTags);
-	    var rawTagEditor = uiSectionRawTagEditor('changeset-tag-editor', context)
-	        .on('change', changeTags)
-	        .readOnlyTags(readOnlyTags);
-	    var commitChanges = uiSectionChanges(context);
-	    var commitWarnings = uiCommitWarnings(context);
+	    _behaviors.forEach(context.install);
 
+	    _keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
 
-	    function commit(selection) {
-	        _selection = selection;
+	    select(document).call(_keybinding);
+	    selectNote();
+	    var sidebar = context.ui().sidebar;
+	    sidebar.show(_noteEditor.note(note).newNote(_newFeature)); // expand the sidebar, avoid obscuring the note if needed
 
-	        // Initialize changeset if one does not exist yet.
-	        if (!context.changeset) { initChangeset(); }
+	    sidebar.expand(sidebar.intersects(note.extent()));
+	    context.map().on('drawn.select', selectNote);
+	  };
 
-	        loadDerivedChangesetTags();
+	  mode.exit = function () {
+	    _behaviors.forEach(context.uninstall);
 
-	        selection.call(render);
-	    }
+	    select(document).call(_keybinding.unbind);
+	    context.surface().selectAll('.layer-notes .selected').classed('selected hover', false);
+	    context.map().on('drawn.select', null);
+	    context.ui().sidebar.hide();
+	    context.selectedNoteID(null);
+	  };
 
-	    function initChangeset() {
+	  return mode;
+	}
 
-	        // expire stored comment, hashtags, source after cutoff datetime - #3947 #4899
-	        var commentDate = +corePreferences('commentDate') || 0;
-	        var currDate = Date.now();
-	        var cutoff = 2 * 86400 * 1000;   // 2 days
-	        if (commentDate > currDate || currDate - commentDate > cutoff) {
-	            corePreferences('comment', null);
-	            corePreferences('hashtags', null);
-	            corePreferences('source', null);
-	        }
+	function modeAddNote(context) {
+	  var mode = {
+	    id: 'add-note',
+	    button: 'note',
+	    description: _t.html('modes.add_note.description'),
+	    key: _t('modes.add_note.key')
+	  };
+	  var behavior = behaviorDraw(context).on('click', add).on('cancel', cancel).on('finish', cancel);
+
+	  function add(loc) {
+	    var osm = services.osm;
+	    if (!osm) return;
+	    var note = osmNote({
+	      loc: loc,
+	      status: 'open',
+	      comments: []
+	    });
+	    osm.replaceNote(note); // force a reraw (there is no history change that would otherwise do this)
 
-	        // load in explicitly-set values, if any
-	        if (context.defaultChangesetComment()) {
-	            corePreferences('comment', context.defaultChangesetComment());
-	            corePreferences('commentDate', Date.now());
-	        }
-	        if (context.defaultChangesetSource()) {
-	            corePreferences('source', context.defaultChangesetSource());
-	            corePreferences('commentDate', Date.now());
-	        }
-	        if (context.defaultChangesetHashtags()) {
-	            corePreferences('hashtags', context.defaultChangesetHashtags());
-	            corePreferences('commentDate', Date.now());
-	        }
+	    context.map().pan([0, 0]);
+	    context.selectedNoteID(note.id).enter(modeSelectNote(context, note.id).newFeature(true));
+	  }
 
-	        var detected = utilDetect();
-	        var tags = {
-	            comment: corePreferences('comment') || '',
-	            created_by: context.cleanTagValue('iD ' + context.version),
-	            host: context.cleanTagValue(detected.host),
-	            locale: context.cleanTagValue(_mainLocalizer.localeCode())
-	        };
+	  function cancel() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	        // call findHashtags initially - this will remove stored
-	        // hashtags if any hashtags are found in the comment - #4304
-	        findHashtags(tags, true);
+	  mode.enter = function () {
+	    context.install(behavior);
+	  };
 
-	        var hashtags = corePreferences('hashtags');
-	        if (hashtags) {
-	            tags.hashtags = hashtags;
-	        }
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	        var source = corePreferences('source');
-	        if (source) {
-	            tags.source = source;
-	        }
-	        var photoOverlaysUsed = context.history().photoOverlaysUsed();
-	        if (photoOverlaysUsed.length) {
-	            var sources = (tags.source || '').split(';');
+	  return mode;
+	}
 
-	            // include this tag for any photo layer
-	            if (sources.indexOf('streetlevel imagery') === -1) {
-	                sources.push('streetlevel imagery');
-	            }
+	function modeSave(context) {
+	  var mode = {
+	    id: 'save'
+	  };
+	  var keybinding = utilKeybinding('modeSave');
+	  var commit = uiCommit(context).on('cancel', cancel);
 
-	            // add the photo overlays used during editing as sources
-	            photoOverlaysUsed.forEach(function(photoOverlay) {
-	                if (sources.indexOf(photoOverlay) === -1) {
-	                    sources.push(photoOverlay);
-	                }
-	            });
+	  var _conflictsUi; // uiConflicts
 
-	            tags.source = context.cleanTagValue(sources.join(';'));
-	        }
 
-	        context.changeset = new osmChangeset({ tags: tags });
-	    }
+	  var _location;
 
-	    // Calculates read-only metadata tags based on the user's editing session and applies
-	    // them to the changeset.
-	    function loadDerivedChangesetTags() {
+	  var _success;
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	  var uploader = context.uploader().on('saveStarted.modeSave', function () {
+	    keybindingOff();
+	  }) // fire off some async work that we want to be ready later
+	  .on('willAttemptUpload.modeSave', prepareForSuccess).on('progressChanged.modeSave', showProgress).on('resultNoChanges.modeSave', function () {
+	    cancel();
+	  }).on('resultErrors.modeSave', showErrors).on('resultConflicts.modeSave', showConflicts).on('resultSuccess.modeSave', showSuccess);
 
-	        var tags = Object.assign({}, context.changeset.tags);   // shallow copy
+	  function cancel() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	        // assign tags for imagery used
-	        var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
-	        tags.imagery_used = imageryUsed || 'None';
+	  function showProgress(num, total) {
+	    var modal = context.container().select('.loading-modal .modal-section');
+	    var progress = modal.selectAll('.progress').data([0]); // enter/update
+
+	    progress.enter().append('div').attr('class', 'progress').merge(progress).text(_t('save.conflict_progress', {
+	      num: num,
+	      total: total
+	    }));
+	  }
+
+	  function showConflicts(changeset, conflicts, origChanges) {
+	    var selection = context.container().select('.sidebar').append('div').attr('class', 'sidebar-component');
+	    context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
+	    _conflictsUi = uiConflicts(context).conflictList(conflicts).origChanges(origChanges).on('cancel', function () {
+	      context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+	      selection.remove();
+	      keybindingOn();
+	      uploader.cancelConflictResolution();
+	    }).on('save', function () {
+	      context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+	      selection.remove();
+	      uploader.processResolvedConflicts(changeset);
+	    });
+	    selection.call(_conflictsUi);
+	  }
+
+	  function showErrors(errors) {
+	    keybindingOn();
+	    var selection = uiConfirm(context.container());
+	    selection.select('.modal-section.header').append('h3').text(_t('save.error'));
+	    addErrors(selection, errors);
+	    selection.okButton();
+	  }
+
+	  function addErrors(selection, data) {
+	    var message = selection.select('.modal-section.message-text');
+	    var items = message.selectAll('.error-container').data(data);
+	    var enter = items.enter().append('div').attr('class', 'error-container');
+	    enter.append('a').attr('class', 'error-description').attr('href', '#').classed('hide-toggle', true).text(function (d) {
+	      return d.msg || _t('save.unknown_error_details');
+	    }).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      var error = select(this);
+	      var detail = select(this.nextElementSibling);
+	      var exp = error.classed('expanded');
+	      detail.style('display', exp ? 'none' : 'block');
+	      error.classed('expanded', !exp);
+	    });
+	    var details = enter.append('div').attr('class', 'error-detail-container').style('display', 'none');
+	    details.append('ul').attr('class', 'error-detail-list').selectAll('li').data(function (d) {
+	      return d.details || [];
+	    }).enter().append('li').attr('class', 'error-detail-item').text(function (d) {
+	      return d;
+	    });
+	    items.exit().remove();
+	  }
 
-	        // assign tags for closed issues and notes
-	        var osmClosed = osm.getClosedIDs();
-	        var itemType;
-	        if (osmClosed.length) {
-	            tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
-	        }
-	        if (services.keepRight) {
-	            var krClosed = services.keepRight.getClosedIDs();
-	            if (krClosed.length) {
-	                tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
-	            }
-	        }
-	        if (services.improveOSM) {
-	            var iOsmClosed = services.improveOSM.getClosedCounts();
-	            for (itemType in iOsmClosed) {
-	                tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
-	            }
-	        }
-	        if (services.osmose) {
-	            var osmoseClosed = services.osmose.getClosedCounts();
-	            for (itemType in osmoseClosed) {
-	                tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
-	            }
-	        }
+	  function showSuccess(changeset) {
+	    commit.reset();
 
-	        // remove existing issue counts
-	        for (var key in tags) {
-	            if (key.match(/(^warnings:)|(^resolved:)/)) {
-	                delete tags[key];
-	            }
-	        }
+	    var ui = _success.changeset(changeset).location(_location).on('cancel', function () {
+	      context.ui().sidebar.hide();
+	    });
 
-	        function addIssueCounts(issues, prefix) {
-	            var issuesByType = utilArrayGroupBy(issues, 'type');
-	            for (var issueType in issuesByType) {
-	                var issuesOfType = issuesByType[issueType];
-	                if (issuesOfType[0].subtype) {
-	                    var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');
-	                    for (var issueSubtype in issuesBySubtype) {
-	                        var issuesOfSubtype = issuesBySubtype[issueSubtype];
-	                        tags[prefix + ':' + issueType + ':' + issueSubtype] = context.cleanTagValue(issuesOfSubtype.length.toString());
-	                    }
-	                } else {
-	                    tags[prefix + ':' + issueType] = context.cleanTagValue(issuesOfType.length.toString());
-	                }
-	            }
-	        }
+	    context.enter(modeBrowse(context).sidebar(ui));
+	  }
 
-	        // add counts of warnings generated by the user's edits
-	        var warnings = context.validator()
-	            .getIssuesBySeverity({ what: 'edited', where: 'all', includeIgnored: true, includeDisabledRules: true }).warning;
-	        addIssueCounts(warnings, 'warnings');
+	  function keybindingOn() {
+	    select(document).call(keybinding.on('⎋', cancel, true));
+	  }
 
-	        // add counts of issues resolved by the user's edits
-	        var resolvedIssues = context.validator().getResolvedIssues();
-	        addIssueCounts(resolvedIssues, 'resolved');
+	  function keybindingOff() {
+	    select(document).call(keybinding.unbind);
+	  } // Reverse geocode current map location so we can display a message on
+	  // the success screen like "Thank you for editing around place, region."
 
-	        context.changeset = context.changeset.update({ tags: tags });
-	    }
 
-	    function render(selection) {
+	  function prepareForSuccess() {
+	    _success = uiSuccess(context);
+	    _location = null;
+	    if (!services.geocoder) return;
+	    services.geocoder.reverse(context.map().center(), function (err, result) {
+	      if (err || !result || !result.address) return;
+	      var addr = result.address;
+	      var place = addr && (addr.town || addr.city || addr.county) || '';
+	      var region = addr && (addr.state || addr.country) || '';
+	      var separator = place && region ? _t('success.thank_you_where.separator') : '';
+	      _location = _t('success.thank_you_where.format', {
+	        place: place,
+	        separator: separator,
+	        region: region
+	      });
+	    });
+	  }
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	  mode.selectedIDs = function () {
+	    return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
+	  };
 
-	        var header = selection.selectAll('.header')
-	            .data([0]);
+	  mode.enter = function () {
+	    // Show sidebar
+	    context.ui().sidebar.expand();
 
-	        var headerTitle = header.enter()
-	            .append('div')
-	            .attr('class', 'header fillL header-container');
+	    function done() {
+	      context.ui().sidebar.show(commit);
+	    }
 
-	        headerTitle
-	            .append('div')
-	            .attr('class', 'header-block header-block-outer');
+	    keybindingOn();
+	    context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+	    var osm = context.connection();
 
-	        headerTitle
-	            .append('div')
-	            .attr('class', 'header-block')
-	            .append('h3')
-	            .text(_t('commit.title'));
+	    if (!osm) {
+	      cancel();
+	      return;
+	    }
 
-	        headerTitle
-	            .append('div')
-	            .attr('class', 'header-block header-block-outer header-block-close')
-	            .append('button')
-	            .attr('class', 'close')
-	            .on('click', function() {
-	                dispatch$1.call('cancel', this);
-	            })
-	            .call(svgIcon('#iD-icon-close'));
-
-	        var body = selection.selectAll('.body')
-	            .data([0]);
-
-	        body = body.enter()
-	            .append('div')
-	            .attr('class', 'body')
-	            .merge(body);
+	    if (osm.authenticated()) {
+	      done();
+	    } else {
+	      osm.authenticate(function (err) {
+	        if (err) {
+	          cancel();
+	        } else {
+	          done();
+	        }
+	      });
+	    }
+	  };
 
+	  mode.exit = function () {
+	    keybindingOff();
+	    context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
+	    context.ui().sidebar.hide();
+	  };
 
-	        // Changeset Section
-	        var changesetSection = body.selectAll('.changeset-editor')
-	            .data([0]);
+	  return mode;
+	}
 
-	        changesetSection = changesetSection.enter()
-	            .append('div')
-	            .attr('class', 'modal-section changeset-editor')
-	            .merge(changesetSection);
+	function modeSelectError(context, selectedErrorID, selectedErrorService) {
+	  var mode = {
+	    id: 'select-error',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('select-error');
+	  var errorService = services[selectedErrorService];
+	  var errorEditor;
 
-	        changesetSection
-	            .call(changesetEditor
-	                .changesetID(context.changeset.id)
-	                .tags(context.changeset.tags)
-	            );
+	  switch (selectedErrorService) {
+	    case 'improveOSM':
+	      errorEditor = uiImproveOsmEditor(context).on('change', function () {
+	        context.map().pan([0, 0]); // trigger a redraw
 
+	        var error = checkSelectedID();
+	        if (!error) return;
+	        context.ui().sidebar.show(errorEditor.error(error));
+	      });
+	      break;
 
-	        // Warnings
-	        body.call(commitWarnings);
+	    case 'keepRight':
+	      errorEditor = uiKeepRightEditor(context).on('change', function () {
+	        context.map().pan([0, 0]); // trigger a redraw
 
+	        var error = checkSelectedID();
+	        if (!error) return;
+	        context.ui().sidebar.show(errorEditor.error(error));
+	      });
+	      break;
 
-	        // Upload Explanation
-	        var saveSection = body.selectAll('.save-section')
-	            .data([0]);
+	    case 'osmose':
+	      errorEditor = uiOsmoseEditor(context).on('change', function () {
+	        context.map().pan([0, 0]); // trigger a redraw
 
-	        saveSection = saveSection.enter()
-	            .append('div')
-	            .attr('class','modal-section save-section fillL')
-	            .merge(saveSection);
+	        var error = checkSelectedID();
+	        if (!error) return;
+	        context.ui().sidebar.show(errorEditor.error(error));
+	      });
+	      break;
+	  }
 
-	        var prose = saveSection.selectAll('.commit-info')
-	            .data([0]);
+	  var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
 
-	        if (prose.enter().size()) {   // first time, make sure to update user details in prose
-	            _userDetails = null;
-	        }
+	  function checkSelectedID() {
+	    if (!errorService) return;
+	    var error = errorService.getError(selectedErrorID);
 
-	        prose = prose.enter()
-	            .append('p')
-	            .attr('class', 'commit-info')
-	            .text(_t('commit.upload_explanation'))
-	            .merge(prose);
+	    if (!error) {
+	      context.enter(modeBrowse(context));
+	    }
 
-	        // always check if this has changed, but only update prose.html()
-	        // if needed, because it can trigger a style recalculation
-	        osm.userDetails(function(err, user) {
-	            if (err) { return; }
+	    return error;
+	  }
 
-	            if (_userDetails === user) { return; }  // no change
-	            _userDetails = user;
+	  mode.zoomToSelected = function () {
+	    if (!errorService) return;
+	    var error = errorService.getError(selectedErrorID);
 
-	            var userLink = select(document.createElement('div'));
+	    if (error) {
+	      context.map().centerZoomEase(error.loc, 20);
+	    }
+	  };
 
-	            if (user.image_url) {
-	                userLink
-	                    .append('img')
-	                    .attr('src', user.image_url)
-	                    .attr('class', 'icon pre-text user-icon');
-	            }
+	  mode.enter = function () {
+	    var error = checkSelectedID();
+	    if (!error) return;
+	    behaviors.forEach(context.install);
+	    keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
+	    select(document).call(keybinding);
+	    selectError();
+	    var sidebar = context.ui().sidebar;
+	    sidebar.show(errorEditor.error(error));
+	    context.map().on('drawn.select-error', selectError); // class the error as selected, or return to browse mode if the error is gone
 
-	            userLink
-	                .append('a')
-	                .attr('class', 'user-info')
-	                .text(user.display_name)
-	                .attr('href', osm.userURL(user.display_name))
-	                .attr('target', '_blank');
+	    function selectError(d3_event, drawn) {
+	      if (!checkSelectedID()) return;
+	      var selection = context.surface().selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
 
-	            prose
-	                .html(_t('commit.upload_explanation_with_user', { user: userLink.html() }));
-	        });
+	      if (selection.empty()) {
+	        // Return to browse mode if selected DOM elements have
+	        // disappeared because the user moved them out of view..
+	        var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;
 
+	        if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+	          context.enter(modeBrowse(context));
+	        }
+	      } else {
+	        selection.classed('selected', true);
+	        context.selectedErrorID(selectedErrorID);
+	      }
+	    }
 
-	        // Request Review
-	        var requestReview = saveSection.selectAll('.request-review')
-	            .data([0]);
+	    function esc() {
+	      if (context.container().select('.combobox').size()) return;
+	      context.enter(modeBrowse(context));
+	    }
+	  };
 
-	        // Enter
-	        var requestReviewEnter = requestReview.enter()
-	            .append('div')
-	            .attr('class', 'request-review');
+	  mode.exit = function () {
+	    behaviors.forEach(context.uninstall);
+	    select(document).call(keybinding.unbind);
+	    context.surface().selectAll('.qaItem.selected').classed('selected hover', false);
+	    context.map().on('drawn.select-error', null);
+	    context.ui().sidebar.hide();
+	    context.selectedErrorID(null);
+	    context.features().forceVisible([]);
+	  };
 
-	        var requestReviewDomId = utilUniqueDomId('commit-input-request-review');
+	  return mode;
+	}
 
-	        var labelEnter = requestReviewEnter
-	            .append('label')
-	            .attr('for', requestReviewDomId);
+	function uiToolOldDrawModes(context) {
+	  var tool = {
+	    id: 'old_modes',
+	    label: _t.html('toolbar.add_feature')
+	  };
+	  var modes = [modeAddPoint(context, {
+	    title: _t.html('modes.add_point.title'),
+	    button: 'point',
+	    description: _t.html('modes.add_point.description'),
+	    preset: _mainPresetIndex.item('point'),
+	    key: '1'
+	  }), modeAddLine(context, {
+	    title: _t.html('modes.add_line.title'),
+	    button: 'line',
+	    description: _t.html('modes.add_line.description'),
+	    preset: _mainPresetIndex.item('line'),
+	    key: '2'
+	  }), modeAddArea(context, {
+	    title: _t.html('modes.add_area.title'),
+	    button: 'area',
+	    description: _t.html('modes.add_area.description'),
+	    preset: _mainPresetIndex.item('area'),
+	    key: '3'
+	  })];
+
+	  function enabled() {
+	    return osmEditable();
+	  }
+
+	  function osmEditable() {
+	    return context.editable();
+	  }
+
+	  modes.forEach(function (mode) {
+	    context.keybinding().on(mode.key, function () {
+	      if (!enabled()) return;
+
+	      if (mode.id === context.mode().id) {
+	        context.enter(modeBrowse(context));
+	      } else {
+	        context.enter(mode);
+	      }
+	    });
+	  });
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .attr('id', requestReviewDomId);
+	  tool.render = function (selection) {
+	    var wrap = selection.append('div').attr('class', 'joined').style('display', 'flex');
 
-	        labelEnter
-	            .append('span')
-	            .text(_t('commit.request_review'));
+	    var debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
+	    });
 
-	        // Update
-	        requestReview = requestReview
-	            .merge(requestReviewEnter);
+	    context.map().on('move.modes', debouncedUpdate).on('drawn.modes', debouncedUpdate);
+	    context.on('enter.modes', update);
+	    update();
 
-	        var requestReviewInput = requestReview.selectAll('input')
-	            .property('checked', isReviewRequested(context.changeset.tags))
-	            .on('change', toggleRequestReview);
+	    function update() {
+	      var buttons = wrap.selectAll('button.add-button').data(modes, function (d) {
+	        return d.id;
+	      }); // exit
 
+	      buttons.exit().remove(); // enter
 
-	        // Buttons
-	        var buttonSection = saveSection.selectAll('.buttons')
-	            .data([0]);
+	      var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
+	        return d.id + ' add-button bar-button';
+	      }).on('click.mode-buttons', function (d3_event, d) {
+	        if (!enabled()) return; // When drawing, ignore accidental clicks on mode buttons - #4042
 
-	        // enter
-	        var buttonEnter = buttonSection.enter()
-	            .append('div')
-	            .attr('class', 'buttons fillL');
+	        var currMode = context.mode().id;
+	        if (/^draw/.test(currMode)) return;
 
-	        buttonEnter
-	            .append('button')
-	            .attr('class', 'secondary-action button cancel-button')
-	            .append('span')
-	            .attr('class', 'label')
-	            .text(_t('commit.cancel'));
+	        if (d.id === currMode) {
+	          context.enter(modeBrowse(context));
+	        } else {
+	          context.enter(d);
+	        }
+	      }).call(uiTooltip().placement('bottom').title(function (d) {
+	        return d.description;
+	      }).keys(function (d) {
+	        return [d.key];
+	      }).scrollContainer(context.container().select('.top-toolbar')));
+	      buttonsEnter.each(function (d) {
+	        select(this).call(svgIcon('#iD-icon-' + d.button));
+	      });
+	      buttonsEnter.append('span').attr('class', 'label').html(function (mode) {
+	        return mode.title;
+	      }); // if we are adding/removing the buttons, check if toolbar has overflowed
+
+	      if (buttons.enter().size() || buttons.exit().size()) {
+	        context.ui().checkOverflow('.top-toolbar', true);
+	      } // update
+
+
+	      buttons = buttons.merge(buttonsEnter).attr('aria-disabled', function (d) {
+	        return !enabled();
+	      }).classed('disabled', function (d) {
+	        return !enabled();
+	      }).attr('aria-pressed', function (d) {
+	        return context.mode() && context.mode().button === d.button;
+	      }).classed('active', function (d) {
+	        return context.mode() && context.mode().button === d.button;
+	      });
+	    }
+	  };
 
-	        var uploadButton = buttonEnter
-	            .append('button')
-	            .attr('class', 'action button save-button');
+	  return tool;
+	}
 
-	        uploadButton.append('span')
-	            .attr('class', 'label')
-	            .text(_t('commit.save'));
+	function uiToolNotes(context) {
+	  var tool = {
+	    id: 'notes',
+	    label: _t.html('modes.add_note.label')
+	  };
+	  var mode = modeAddNote(context);
 
-	        var uploadBlockerTooltipText = getUploadBlockerMessage();
+	  function enabled() {
+	    return notesEnabled() && notesEditable();
+	  }
 
-	        // update
-	        buttonSection = buttonSection
-	            .merge(buttonEnter);
+	  function notesEnabled() {
+	    var noteLayer = context.layers().layer('notes');
+	    return noteLayer && noteLayer.enabled();
+	  }
 
-	        buttonSection.selectAll('.cancel-button')
-	            .on('click.cancel', function() {
-	                dispatch$1.call('cancel', this);
-	            });
+	  function notesEditable() {
+	    var mode = context.mode();
+	    return context.map().notesEditable() && mode && mode.id !== 'save';
+	  }
 
-	        buttonSection.selectAll('.save-button')
-	            .classed('disabled', uploadBlockerTooltipText !== null)
-	            .on('click.save', function() {
-	                if (!select(this).classed('disabled')) {
-	                    this.blur();    // avoid keeping focus on the button - #4641
-	                    context.uploader().save(context.changeset);
-	                }
-	            });
+	  context.keybinding().on(mode.key, function () {
+	    if (!enabled()) return;
 
-	        // remove any existing tooltip
-	        uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
+	    if (mode.id === context.mode().id) {
+	      context.enter(modeBrowse(context));
+	    } else {
+	      context.enter(mode);
+	    }
+	  });
 
-	        if (uploadBlockerTooltipText) {
-	            buttonSection.selectAll('.save-button')
-	                .call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
-	        }
+	  tool.render = function (selection) {
+	    var debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
+	    });
 
-	        // Raw Tag Editor
-	        var tagSection = body.selectAll('.tag-section.raw-tag-editor')
-	            .data([0]);
+	    context.map().on('move.notes', debouncedUpdate).on('drawn.notes', debouncedUpdate);
+	    context.on('enter.notes', update);
+	    update();
 
-	        tagSection = tagSection.enter()
-	            .append('div')
-	            .attr('class', 'modal-section tag-section raw-tag-editor')
-	            .merge(tagSection);
+	    function update() {
+	      var showNotes = notesEnabled();
+	      var data = showNotes ? [mode] : [];
+	      var buttons = selection.selectAll('button.add-button').data(data, function (d) {
+	        return d.id;
+	      }); // exit
 
-	        tagSection
-	            .call(rawTagEditor
-	                .tags(Object.assign({}, context.changeset.tags))   // shallow copy
-	                .render
-	            );
+	      buttons.exit().remove(); // enter
 
-	        var changesSection = body.selectAll('.commit-changes-section')
-	            .data([0]);
+	      var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
+	        return d.id + ' add-button bar-button';
+	      }).on('click.notes', function (d3_event, d) {
+	        if (!enabled()) return; // When drawing, ignore accidental clicks on mode buttons - #4042
 
-	        changesSection = changesSection.enter()
-	            .append('div')
-	            .attr('class', 'modal-section commit-changes-section')
-	            .merge(changesSection);
+	        var currMode = context.mode().id;
+	        if (/^draw/.test(currMode)) return;
 
-	        // Change summary
-	        changesSection.call(commitChanges.render);
+	        if (d.id === currMode) {
+	          context.enter(modeBrowse(context));
+	        } else {
+	          context.enter(d);
+	        }
+	      }).call(uiTooltip().placement('bottom').title(function (d) {
+	        return d.description;
+	      }).keys(function (d) {
+	        return [d.key];
+	      }).scrollContainer(context.container().select('.top-toolbar')));
+	      buttonsEnter.each(function (d) {
+	        select(this).call(svgIcon(d.icon || '#iD-icon-' + d.button));
+	      }); // if we are adding/removing the buttons, check if toolbar has overflowed
+
+	      if (buttons.enter().size() || buttons.exit().size()) {
+	        context.ui().checkOverflow('.top-toolbar', true);
+	      } // update
+
+
+	      buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
+	        return !enabled();
+	      }).attr('aria-disabled', function (d) {
+	        return !enabled();
+	      }).classed('active', function (d) {
+	        return context.mode() && context.mode().button === d.button;
+	      }).attr('aria-pressed', function (d) {
+	        return context.mode() && context.mode().button === d.button;
+	      });
+	    }
+	  };
 
+	  tool.uninstall = function () {
+	    context.on('enter.editor.notes', null).on('exit.editor.notes', null).on('enter.notes', null);
+	    context.map().on('move.notes', null).on('drawn.notes', null);
+	  };
 
-	        function toggleRequestReview() {
-	            var rr = requestReviewInput.property('checked');
-	            updateChangeset({ review_requested: (rr ? 'yes' : undefined) });
+	  return tool;
+	}
 
-	            tagSection
-	                .call(rawTagEditor
-	                    .tags(Object.assign({}, context.changeset.tags))   // shallow copy
-	                    .render
-	                );
-	        }
-	    }
+	function uiToolSave(context) {
+	  var tool = {
+	    id: 'save',
+	    label: _t.html('save.title')
+	  };
+	  var button = null;
+	  var tooltipBehavior = null;
+	  var history = context.history();
+	  var key = uiCmd('⌘S');
+	  var _numChanges = 0;
 
+	  function isSaving() {
+	    var mode = context.mode();
+	    return mode && mode.id === 'save';
+	  }
 
-	    function getUploadBlockerMessage() {
-	        var errors = context.validator()
-	            .getIssuesBySeverity({ what: 'edited', where: 'all' }).error;
+	  function isDisabled() {
+	    return _numChanges === 0 || isSaving();
+	  }
 
-	        if (errors.length) {
-	            return _t('commit.outstanding_errors_message', { count: errors.length });
+	  function save(d3_event) {
+	    d3_event.preventDefault();
 
-	        } else {
-	            var hasChangesetComment = context.changeset && context.changeset.tags.comment && context.changeset.tags.comment.trim().length;
-	            if (!hasChangesetComment) {
-	                return _t('commit.comment_needed_message');
-	            }
-	        }
-	        return null;
+	    if (!context.inIntro() && !isSaving() && history.hasChanges()) {
+	      context.enter(modeSave(context));
 	    }
+	  }
 
+	  function bgColor() {
+	    var step;
 
-	    function changeTags(_, changed, onInput) {
-	        if (changed.hasOwnProperty('comment')) {
-	            if (changed.comment === undefined) {
-	                changed.comment = '';
-	            }
-	            if (!onInput) {
-	                corePreferences('comment', changed.comment);
-	                corePreferences('commentDate', Date.now());
-	            }
-	        }
-	        if (changed.hasOwnProperty('source')) {
-	            if (changed.source === undefined) {
-	                corePreferences('source', null);
-	            } else if (!onInput) {
-	                corePreferences('source', changed.source);
-	                corePreferences('commentDate', Date.now());
-	            }
-	        }
-	        // no need to update `prefs` for `hashtags` here since it's done in `updateChangeset`
+	    if (_numChanges === 0) {
+	      return null;
+	    } else if (_numChanges <= 50) {
+	      step = _numChanges / 50;
+	      return d3_interpolateRgb('#fff', '#ff8')(step); // white -> yellow
+	    } else {
+	      step = Math.min((_numChanges - 50) / 50, 1.0);
+	      return d3_interpolateRgb('#ff8', '#f88')(step); // yellow -> red
+	    }
+	  }
 
-	        updateChangeset(changed, onInput);
+	  function updateCount() {
+	    var val = history.difference().summary().length;
+	    if (val === _numChanges) return;
+	    _numChanges = val;
 
-	        if (_selection) {
-	            _selection.call(render);
-	        }
+	    if (tooltipBehavior) {
+	      tooltipBehavior.title(_t.html(_numChanges > 0 ? 'save.help' : 'save.no_changes')).keys([key]);
 	    }
 
+	    if (button) {
+	      button.classed('disabled', isDisabled()).style('background', bgColor());
+	      button.select('span.count').text(_numChanges);
+	    }
+	  }
 
-	    function findHashtags(tags, commentOnly) {
-	        var detectedHashtags = commentHashtags();
-
-	        if (detectedHashtags.length) {
-	            // always remove stored hashtags if there are hashtags in the comment - #4304
-	            corePreferences('hashtags', null);
-	        }
-	        if (!detectedHashtags.length || !commentOnly) {
-	            detectedHashtags = detectedHashtags.concat(hashtagHashtags());
-	        }
+	  tool.render = function (selection) {
+	    tooltipBehavior = uiTooltip().placement('bottom').title(_t.html('save.no_changes')).keys([key]).scrollContainer(context.container().select('.top-toolbar'));
+	    var lastPointerUpType;
+	    button = selection.append('button').attr('class', 'save disabled bar-button').on('pointerup', function (d3_event) {
+	      lastPointerUpType = d3_event.pointerType;
+	    }).on('click', function (d3_event) {
+	      save(d3_event);
 
-	        var allLowerCase = new Set();
-	        return detectedHashtags.filter(function(hashtag) {
-	            // Compare tags as lowercase strings, but keep original case tags
-	            var lowerCase = hashtag.toLowerCase();
-	            if (!allLowerCase.has(lowerCase)) {
-	                allLowerCase.add(lowerCase);
-	                return true;
-	            }
-	            return false;
-	        });
+	      if (_numChanges === 0 && (lastPointerUpType === 'touch' || lastPointerUpType === 'pen')) {
+	        // there are no tooltips for touch interactions so flash feedback instead
+	        context.ui().flash.duration(2000).iconName('#iD-icon-save').iconClass('disabled').label(_t.html('save.no_changes'))();
+	      }
 
-	        // Extract hashtags from `comment`
-	        function commentHashtags() {
-	            var matches = (tags.comment || '')
-	                .replace(/http\S*/g, '')  // drop anything that looks like a URL - #4289
-	                .match(hashtagRegex);
+	      lastPointerUpType = null;
+	    }).call(tooltipBehavior);
+	    button.call(svgIcon('#iD-icon-save'));
+	    button.append('span').attr('class', 'count').attr('aria-hidden', 'true').text('0');
+	    updateCount();
+	    context.keybinding().on(key, save, true);
+	    context.history().on('change.save', updateCount);
+	    context.on('enter.save', function () {
+	      if (button) {
+	        button.classed('disabled', isDisabled());
 
-	            return matches || [];
+	        if (isSaving()) {
+	          button.call(tooltipBehavior.hide);
 	        }
+	      }
+	    });
+	  };
 
-	        // Extract and clean hashtags from `hashtags`
-	        function hashtagHashtags() {
-	            var matches = (tags.hashtags || '')
-	                .split(/[,;\s]+/)
-	                .map(function (s) {
-	                    if (s[0] !== '#') { s = '#' + s; }    // prepend '#'
-	                    var matched = s.match(hashtagRegex);
-	                    return matched && matched[0];
-	                }).filter(Boolean);                       // exclude falsy
+	  tool.uninstall = function () {
+	    context.keybinding().off(key, true);
+	    context.history().on('change.save', null);
+	    context.on('enter.save', null);
+	    button = null;
+	    tooltipBehavior = null;
+	  };
 
-	            return matches || [];
-	        }
-	    }
+	  return tool;
+	}
 
+	function uiToolSidebarToggle(context) {
+	  var tool = {
+	    id: 'sidebar_toggle',
+	    label: _t.html('toolbar.inspect')
+	  };
 
-	    function isReviewRequested(tags) {
-	        var rr = tags.review_requested;
-	        if (rr === undefined) { return false; }
-	        rr = rr.trim().toLowerCase();
-	        return !(rr === '' || rr === 'no');
-	    }
+	  tool.render = function (selection) {
+	    selection.append('button').attr('class', 'bar-button').attr('aria-label', _t('sidebar.tooltip')).on('click', function () {
+	      context.ui().sidebar.toggle();
+	    }).call(uiTooltip().placement('bottom').title(_t.html('sidebar.tooltip')).keys([_t('sidebar.key')]).scrollContainer(context.container().select('.top-toolbar'))).call(svgIcon('#iD-icon-sidebar-' + (_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')));
+	  };
 
+	  return tool;
+	}
 
-	    function updateChangeset(changed, onInput) {
-	        var tags = Object.assign({}, context.changeset.tags);   // shallow copy
+	function uiToolUndoRedo(context) {
+	  var tool = {
+	    id: 'undo_redo',
+	    label: _t.html('toolbar.undo_redo')
+	  };
+	  var commands = [{
+	    id: 'undo',
+	    cmd: uiCmd('⌘Z'),
+	    action: function action() {
+	      context.undo();
+	    },
+	    annotation: function annotation() {
+	      return context.history().undoAnnotation();
+	    },
+	    icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')
+	  }, {
+	    id: 'redo',
+	    cmd: uiCmd('⌘⇧Z'),
+	    action: function action() {
+	      context.redo();
+	    },
+	    annotation: function annotation() {
+	      return context.history().redoAnnotation();
+	    },
+	    icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'undo' : 'redo')
+	  }];
 
-	        Object.keys(changed).forEach(function(k) {
-	            var v = changed[k];
-	            k = context.cleanTagKey(k);
-	            if (readOnlyTags.indexOf(k) !== -1) { return; }
+	  function editable() {
+	    return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true
+	    /* ignore min zoom */
+	    );
+	  }
 
-	            if (k !== '' && v !== undefined) {
-	                if (onInput) {
-	                    tags[k] = v;
-	                } else {
-	                    tags[k] = context.cleanTagValue(v);
-	                }
-	            } else {
-	                delete tags[k];
-	            }
-	        });
+	  tool.render = function (selection) {
+	    var tooltipBehavior = uiTooltip().placement('bottom').title(function (d) {
+	      return d.annotation() ? _t.html(d.id + '.tooltip', {
+	        action: d.annotation()
+	      }) : _t.html(d.id + '.nothing');
+	    }).keys(function (d) {
+	      return [d.cmd];
+	    }).scrollContainer(context.container().select('.top-toolbar'));
+	    var lastPointerUpType;
+	    var buttons = selection.selectAll('button').data(commands).enter().append('button').attr('class', function (d) {
+	      return 'disabled ' + d.id + '-button bar-button';
+	    }).on('pointerup', function (d3_event) {
+	      // `pointerup` is always called before `click`
+	      lastPointerUpType = d3_event.pointerType;
+	    }).on('click', function (d3_event, d) {
+	      d3_event.preventDefault();
+	      var annotation = d.annotation();
+
+	      if (editable() && annotation) {
+	        d.action();
+	      }
 
-	        if (!onInput) {
-	            // when changing the comment, override hashtags with any found in comment.
-	            var commentOnly = changed.hasOwnProperty('comment') && (changed.comment !== '');
-	            var arr = findHashtags(tags, commentOnly);
-	            if (arr.length) {
-	                tags.hashtags = context.cleanTagValue(arr.join(';'));
-	                corePreferences('hashtags', tags.hashtags);
-	            } else {
-	                delete tags.hashtags;
-	                corePreferences('hashtags', null);
-	            }
-	        }
+	      if (editable() && (lastPointerUpType === 'touch' || lastPointerUpType === 'pen')) {
+	        // there are no tooltips for touch interactions so flash feedback instead
+	        var text = annotation ? _t.html(d.id + '.tooltip', {
+	          action: annotation
+	        }) : _t.html(d.id + '.nothing');
+	        context.ui().flash.duration(2000).iconName('#' + d.icon).iconClass(annotation ? '' : 'disabled').label(text)();
+	      }
 
-	        // always update userdetails, just in case user reauthenticates as someone else
-	        if (_userDetails && _userDetails.changesets_count !== undefined) {
-	            var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1;  // #4283
-	            tags.changesets_count = String(changesetsCount);
+	      lastPointerUpType = null;
+	    }).call(tooltipBehavior);
+	    buttons.each(function (d) {
+	      select(this).call(svgIcon('#' + d.icon));
+	    });
+	    context.keybinding().on(commands[0].cmd, function (d3_event) {
+	      d3_event.preventDefault();
+	      if (editable()) commands[0].action();
+	    }).on(commands[1].cmd, function (d3_event) {
+	      d3_event.preventDefault();
+	      if (editable()) commands[1].action();
+	    });
 
-	            // first 100 edits - new user
-	            if (changesetsCount <= 100) {
-	                var s;
-	                s = corePreferences('walkthrough_completed');
-	                if (s) {
-	                    tags['ideditor:walkthrough_completed'] = s;
-	                }
+	    var debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
+	    });
 
-	                s = corePreferences('walkthrough_progress');
-	                if (s) {
-	                    tags['ideditor:walkthrough_progress'] = s;
-	                }
+	    context.map().on('move.undo_redo', debouncedUpdate).on('drawn.undo_redo', debouncedUpdate);
+	    context.history().on('change.undo_redo', function (difference) {
+	      if (difference) update();
+	    });
+	    context.on('enter.undo_redo', update);
 
-	                s = corePreferences('walkthrough_started');
-	                if (s) {
-	                    tags['ideditor:walkthrough_started'] = s;
-	                }
-	            }
-	        } else {
-	            delete tags.changesets_count;
-	        }
+	    function update() {
+	      buttons.classed('disabled', function (d) {
+	        return !editable() || !d.annotation();
+	      }).each(function () {
+	        var selection = select(this);
 
-	        if (!fastDeepEqual(context.changeset.tags, tags)) {
-	            context.changeset = context.changeset.update({ tags: tags });
+	        if (!selection.select('.tooltip.in').empty()) {
+	          selection.call(tooltipBehavior.updateContent);
 	        }
+	      });
 	    }
+	  };
 
+	  tool.uninstall = function () {
+	    context.keybinding().off(commands[0].cmd).off(commands[1].cmd);
+	    context.map().on('move.undo_redo', null).on('drawn.undo_redo', null);
+	    context.history().on('change.undo_redo', null);
+	    context.on('enter.undo_redo', null);
+	  };
 
-	    commit.reset = function() {
-	        context.changeset = null;
-	    };
+	  return tool;
+	}
 
+	function uiTopToolbar(context) {
+	  var sidebarToggle = uiToolSidebarToggle(context),
+	      modes = uiToolOldDrawModes(context),
+	      notes = uiToolNotes(context),
+	      undoRedo = uiToolUndoRedo(context),
+	      save = uiToolSave(context);
+
+	  function notesEnabled() {
+	    var noteLayer = context.layers().layer('notes');
+	    return noteLayer && noteLayer.enabled();
+	  }
+
+	  function topToolbar(bar) {
+	    bar.on('wheel.topToolbar', function (d3_event) {
+	      if (!d3_event.deltaX) {
+	        // translate vertical scrolling into horizontal scrolling in case
+	        // the user doesn't have an input device that can scroll horizontally
+	        bar.node().scrollLeft += d3_event.deltaY;
+	      }
+	    });
 
-	    return utilRebind(commit, dispatch$1, 'on');
-	}
+	    var debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
+	    });
 
-	var RADIUS = 6378137;
-	var FLATTENING = 1/298.257223563;
-	var POLAR_RADIUS$1 = 6356752.3142;
+	    context.layers().on('change.topToolbar', debouncedUpdate);
+	    update();
 
-	var wgs84 = {
-		RADIUS: RADIUS,
-		FLATTENING: FLATTENING,
-		POLAR_RADIUS: POLAR_RADIUS$1
-	};
+	    function update() {
+	      var tools = [sidebarToggle, 'spacer', modes];
+	      tools.push('spacer');
 
-	var geometry_1 = geometry;
-	var ring = ringArea;
+	      if (notesEnabled()) {
+	        tools = tools.concat([notes, 'spacer']);
+	      }
 
-	function geometry(_) {
-	    var area = 0, i;
-	    switch (_.type) {
-	        case 'Polygon':
-	            return polygonArea(_.coordinates);
-	        case 'MultiPolygon':
-	            for (i = 0; i < _.coordinates.length; i++) {
-	                area += polygonArea(_.coordinates[i]);
-	            }
-	            return area;
-	        case 'Point':
-	        case 'MultiPoint':
-	        case 'LineString':
-	        case 'MultiLineString':
-	            return 0;
-	        case 'GeometryCollection':
-	            for (i = 0; i < _.geometries.length; i++) {
-	                area += geometry(_.geometries[i]);
-	            }
-	            return area;
+	      tools = tools.concat([undoRedo, save]);
+	      var toolbarItems = bar.selectAll('.toolbar-item').data(tools, function (d) {
+	        return d.id || d;
+	      });
+	      toolbarItems.exit().each(function (d) {
+	        if (d.uninstall) {
+	          d.uninstall();
+	        }
+	      }).remove();
+	      var itemsEnter = toolbarItems.enter().append('div').attr('class', function (d) {
+	        var classes = 'toolbar-item ' + (d.id || d).replace('_', '-');
+	        if (d.klass) classes += ' ' + d.klass;
+	        return classes;
+	      });
+	      var actionableItems = itemsEnter.filter(function (d) {
+	        return d !== 'spacer';
+	      });
+	      actionableItems.append('div').attr('class', 'item-content').each(function (d) {
+	        select(this).call(d.render, bar);
+	      });
+	      actionableItems.append('div').attr('class', 'item-label').html(function (d) {
+	        return d.label;
+	      });
 	    }
-	}
+	  }
 
-	function polygonArea(coords) {
-	    var area = 0;
-	    if (coords && coords.length > 0) {
-	        area += Math.abs(ringArea(coords[0]));
-	        for (var i = 1; i < coords.length; i++) {
-	            area -= Math.abs(ringArea(coords[i]));
-	        }
-	    }
-	    return area;
+	  return topToolbar;
 	}
 
-	/**
-	 * Calculate the approximate area of the polygon were it projected onto
-	 *     the earth.  Note that this area will be positive if ring is oriented
-	 *     clockwise, otherwise it will be negative.
-	 *
-	 * Reference:
-	 * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
-	 *     Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
-	 *     Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
-	 *
-	 * Returns:
-	 * {float} The approximate signed geodesic area of the polygon in square
-	 *     meters.
-	 */
+	function uiZoomToSelection(context) {
+	  function isDisabled() {
+	    var mode = context.mode();
+	    return !mode || !mode.zoomToSelected;
+	  }
 
-	function ringArea(coords) {
-	    var p1, p2, p3, lowerIndex, middleIndex, upperIndex, i,
-	    area = 0,
-	    coordsLength = coords.length;
-
-	    if (coordsLength > 2) {
-	        for (i = 0; i < coordsLength; i++) {
-	            if (i === coordsLength - 2) {// i = N-2
-	                lowerIndex = coordsLength - 2;
-	                middleIndex = coordsLength -1;
-	                upperIndex = 0;
-	            } else if (i === coordsLength - 1) {// i = N-1
-	                lowerIndex = coordsLength - 1;
-	                middleIndex = 0;
-	                upperIndex = 1;
-	            } else { // i = 0 to N-3
-	                lowerIndex = i;
-	                middleIndex = i+1;
-	                upperIndex = i+2;
-	            }
-	            p1 = coords[lowerIndex];
-	            p2 = coords[middleIndex];
-	            p3 = coords[upperIndex];
-	            area += ( rad(p3[0]) - rad(p1[0]) ) * Math.sin( rad(p2[1]));
-	        }
+	  var _lastPointerUpType;
+
+	  function pointerup(d3_event) {
+	    _lastPointerUpType = d3_event.pointerType;
+	  }
+
+	  function click(d3_event) {
+	    d3_event.preventDefault();
 
-	        area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
+	    if (isDisabled()) {
+	      if (_lastPointerUpType === 'touch' || _lastPointerUpType === 'pen') {
+	        context.ui().flash.duration(2000).iconName('#iD-icon-framed-dot').iconClass('disabled').label(_t.html('inspector.zoom_to.no_selection'))();
+	      }
+	    } else {
+	      var mode = context.mode();
+
+	      if (mode && mode.zoomToSelected) {
+	        mode.zoomToSelected();
+	      }
 	    }
 
-	    return area;
-	}
+	    _lastPointerUpType = null;
+	  }
 
-	function rad(_) {
-	    return _ * Math.PI / 180;
-	}
+	  return function (selection) {
+	    var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function () {
+	      if (isDisabled()) {
+	        return _t.html('inspector.zoom_to.no_selection');
+	      }
 
-	var geojsonArea = {
-		geometry: geometry_1,
-		ring: ring
-	};
+	      return _t.html('inspector.zoom_to.title');
+	    }).keys([_t('inspector.zoom_to.key')]);
+	    var button = selection.append('button').on('pointerup', pointerup).on('click', click).call(svgIcon('#iD-icon-framed-dot', 'light')).call(tooltipBehavior);
 
-	function toRadians(angleInDegrees) {
-	  return (angleInDegrees * Math.PI) / 180;
-	}
+	    function setEnabledState() {
+	      button.classed('disabled', isDisabled());
 
-	function toDegrees(angleInRadians) {
-	  return (angleInRadians * 180) / Math.PI;
-	}
+	      if (!button.select('.tooltip.in').empty()) {
+	        button.call(tooltipBehavior.updateContent);
+	      }
+	    }
 
-	function offset(c1, distance, bearing) {
-	  var lat1 = toRadians(c1[1]);
-	  var lon1 = toRadians(c1[0]);
-	  var dByR = distance / 6378137; // distance divided by 6378137 (radius of the earth) wgs84
-	  var lat = Math.asin(
-	    Math.sin(lat1) * Math.cos(dByR) +
-	      Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing)
-	  );
-	  var lon =
-	    lon1 +
-	    Math.atan2(
-	      Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1),
-	      Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat)
-	    );
-	  return [toDegrees(lon), toDegrees(lat)];
+	    context.on('enter.uiZoomToSelection', setEnabledState);
+	    setEnabledState();
+	  };
 	}
 
-	function validateCenter(center) {
-	  var validCenterLengths = [2, 3];
-	  if (!Array.isArray(center) || !validCenterLengths.includes(center.length)) {
-	    throw new Error("ERROR! Center has to be an array of length two or three");
-	  }
-	  var lng = center[0];
-	  var lat = center[1];
-	  if (typeof lng !== "number" || typeof lat !== "number") {
-	    throw new Error(
-	      ("ERROR! Longitude and Latitude has to be numbers but where " + (typeof lng) + " and " + (typeof lat))
-	    );
-	  }
-	  if (lng > 180 || lng < -180) {
-	    throw new Error(
-	      ("ERROR! Longitude has to be between -180 and 180 but was " + lng)
-	    );
-	  }
+	function uiPane(id, context) {
+	  var _key;
 
-	  if (lat > 90 || lat < -90) {
-	    throw new Error(
-	      ("ERROR! Latitude has to be between -90 and 90 but was " + lat)
-	    );
-	  }
-	}
+	  var _label = '';
+	  var _description = '';
+	  var _iconName = '';
 
-	function validateRadius(radius) {
-	  if (typeof radius !== "number") {
-	    throw new Error(
-	      ("ERROR! Radius has to be a positive number but was: " + (typeof radius))
-	    );
-	  }
+	  var _sections; // array of uiSection objects
 
-	  if (radius <= 0) {
-	    throw new Error(
-	      ("ERROR! Radius has to be a positive number but was: " + radius)
-	    );
-	  }
-	}
 
-	function validateNumberOfSegments(numberOfSegments) {
-	  if (typeof numberOfSegments !== "number" && numberOfSegments !== undefined) {
-	    throw new Error(
-	      ("ERROR! Number of segments has to be a number but was: " + (typeof numberOfSegments))
-	    );
-	  }
+	  var _paneSelection = select(null);
 
-	  if (numberOfSegments < 3) {
-	    throw new Error(
-	      ("ERROR! Number of segments has to be at least 3 but was: " + numberOfSegments)
-	    );
-	  }
-	}
+	  var _paneTooltip;
 
-	function validateInput(ref) {
-	  var center = ref.center;
-	  var radius = ref.radius;
-	  var numberOfSegments = ref.numberOfSegments;
+	  var pane = {
+	    id: id
+	  };
 
-	  validateCenter(center);
-	  validateRadius(radius);
-	  validateNumberOfSegments(numberOfSegments);
-	}
+	  pane.label = function (val) {
+	    if (!arguments.length) return _label;
+	    _label = val;
+	    return pane;
+	  };
 
-	var circleToPolygon = function circleToPolygon(center, radius, numberOfSegments) {
-	  var n = numberOfSegments ? numberOfSegments : 32;
+	  pane.key = function (val) {
+	    if (!arguments.length) return _key;
+	    _key = val;
+	    return pane;
+	  };
 
-	  // validateInput() throws error on invalid input and do nothing on valid input
-	  validateInput({ center: center, radius: radius, numberOfSegments: numberOfSegments });
+	  pane.description = function (val) {
+	    if (!arguments.length) return _description;
+	    _description = val;
+	    return pane;
+	  };
 
-	  var coordinates = [];
-	  for (var i = 0; i < n; ++i) {
-	    coordinates.push(offset(center, radius, (2 * Math.PI * -i) / n));
-	  }
-	  coordinates.push(coordinates[0]);
+	  pane.iconName = function (val) {
+	    if (!arguments.length) return _iconName;
+	    _iconName = val;
+	    return pane;
+	  };
 
-	  return {
-	    type: "Polygon",
-	    coordinates: [coordinates]
+	  pane.sections = function (val) {
+	    if (!arguments.length) return _sections;
+	    _sections = val;
+	    return pane;
+	  };
+
+	  pane.selection = function () {
+	    return _paneSelection;
 	  };
-	};
 
-	var geojsonPrecision = createCommonjsModule(function (module) {
-	(function() {
+	  function hidePane() {
+	    context.ui().togglePanes();
+	  }
 
-	  function parse(t, coordinatePrecision, extrasPrecision) {
+	  pane.togglePane = function (d3_event) {
+	    if (d3_event) d3_event.preventDefault();
 
-	    function point(p) {
-	      return p.map(function(e, index) {
-	        if (index < 2) {
-	            return 1 * e.toFixed(coordinatePrecision);
-	        } else {
-	            return 1 * e.toFixed(extrasPrecision);
-	        }
-	      });
-	    }
+	    _paneTooltip.hide();
 
-	    function multi(l) {
-	      return l.map(point);
-	    }
+	    context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
+	  };
 
-	    function poly(p) {
-	      return p.map(multi);
+	  pane.renderToggleButton = function (selection) {
+	    if (!_paneTooltip) {
+	      _paneTooltip = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_description).keys([_key]);
 	    }
 
-	    function multiPoly(m) {
-	      return m.map(poly);
-	    }
+	    selection.append('button').on('click', pane.togglePane).call(svgIcon('#' + _iconName, 'light')).call(_paneTooltip);
+	  };
 
-	    function geometry(obj) {
-	      if (!obj) {
-	        return {};
-	      }
-	      
-	      switch (obj.type) {
-	        case "Point":
-	          obj.coordinates = point(obj.coordinates);
-	          return obj;
-	        case "LineString":
-	        case "MultiPoint":
-	          obj.coordinates = multi(obj.coordinates);
-	          return obj;
-	        case "Polygon":
-	        case "MultiLineString":
-	          obj.coordinates = poly(obj.coordinates);
-	          return obj;
-	        case "MultiPolygon":
-	          obj.coordinates = multiPoly(obj.coordinates);
-	          return obj;
-	        case "GeometryCollection":
-	          obj.geometries = obj.geometries.map(geometry);
-	          return obj;
-	        default :
-	          return {};
-	      }
+	  pane.renderContent = function (selection) {
+	    // override to fully customize content
+	    if (_sections) {
+	      _sections.forEach(function (section) {
+	        selection.call(section.render);
+	      });
 	    }
+	  };
 
-	    function feature(obj) {
-	      obj.geometry = geometry(obj.geometry);
-	      return obj
-	    }
+	  pane.renderPane = function (selection) {
+	    _paneSelection = selection.append('div').attr('class', 'fillL map-pane hide ' + id + '-pane').attr('pane', id);
 
-	    function featureCollection(f) {
-	      f.features = f.features.map(feature);
-	      return f;
-	    }
+	    var heading = _paneSelection.append('div').attr('class', 'pane-heading');
 
-	    function geometryCollection(g) {
-	      g.geometries = g.geometries.map(geometry);
-	      return g;
-	    }
+	    heading.append('h2').html(_label);
+	    heading.append('button').attr('title', _t('icons.close')).on('click', hidePane).call(svgIcon('#iD-icon-close'));
 
-	    if (!t) {
-	      return t;
-	    }
+	    _paneSelection.append('div').attr('class', 'pane-content').call(pane.renderContent);
 
-	    switch (t.type) {
-	      case "Feature":
-	        return feature(t);
-	      case "GeometryCollection" :
-	        return geometryCollection(t);
-	      case "FeatureCollection" :
-	        return featureCollection(t);
-	      case "Point":
-	      case "LineString":
-	      case "Polygon":
-	      case "MultiPoint":
-	      case "MultiPolygon":
-	      case "MultiLineString":
-	        return geometry(t);
-	      default :
-	        return t;
+	    if (_key) {
+	      context.keybinding().on(_key, pane.togglePane);
 	    }
-	      
-	  }
+	  };
 
-	  module.exports = parse;
-	  module.exports.parse = parse;
+	  return pane;
+	}
 
-	}());
-	});
+	function uiSectionBackgroundDisplayOptions(context) {
+	  var section = uiSection('background-display-options', context).label(_t.html('background.display_options')).disclosureContent(renderDisclosureContent);
 
-	/* Polyfill service v3.13.0
-	 * For detailed credits and licence information see http://github.com/financial-times/polyfill-service
-	 *
-	 * - Array.prototype.fill, License: CC0 */
+	  var _detected = utilDetect();
 
-	if (!('fill' in Array.prototype)) {
-	  Object.defineProperty(Array.prototype, 'fill', {
-	    configurable: true,
-	    value: function fill (value) {
-	      if (this === undefined || this === null) {
-	        throw new TypeError(this + ' is not an object')
-	      }
+	  var _storedOpacity = corePreferences('background-opacity');
 
-	      var arrayLike = Object(this);
+	  var _minVal = 0;
 
-	      var length = Math.max(Math.min(arrayLike.length, 9007199254740991), 0) || 0;
+	  var _maxVal = _detected.cssfilters ? 3 : 1;
 
-	      var relativeStart = 1 in arguments ? parseInt(Number(arguments[1]), 10) || 0 : 0;
+	  var _sliders = _detected.cssfilters ? ['brightness', 'contrast', 'saturation', 'sharpness'] : ['brightness'];
 
-	      relativeStart = relativeStart < 0 ? Math.max(length + relativeStart, 0) : Math.min(relativeStart, length);
+	  var _options = {
+	    brightness: _storedOpacity !== null ? +_storedOpacity : 1,
+	    contrast: 1,
+	    saturation: 1,
+	    sharpness: 1
+	  };
 
-	      var relativeEnd = 2 in arguments && arguments[2] !== undefined ? parseInt(Number(arguments[2]), 10) || 0 : length;
+	  function clamp(x, min, max) {
+	    return Math.max(min, Math.min(x, max));
+	  }
 
-	      relativeEnd = relativeEnd < 0 ? Math.max(length + arguments[2], 0) : Math.min(relativeEnd, length);
+	  function updateValue(d, val) {
+	    val = clamp(val, _minVal, _maxVal);
+	    _options[d] = val;
+	    context.background()[d](val);
 
-	      while (relativeStart < relativeEnd) {
-	        arrayLike[relativeStart] = value;
+	    if (d === 'brightness') {
+	      corePreferences('background-opacity', val);
+	    }
 
-	        ++relativeStart;
-	      }
+	    section.reRender();
+	  }
 
-	      return arrayLike
-	    },
-	    writable: true
-	  });
-	}
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.display-options-container').data([0]);
+	    var containerEnter = container.enter().append('div').attr('class', 'display-options-container controls-list'); // add slider controls
 
-	/**
-	 * Polyfill for IE support
-	 */
-	Number.isFinite = Number.isFinite || function (value) {
-	  return typeof value === 'number' && isFinite(value)
-	};
+	    var slidersEnter = containerEnter.selectAll('.display-control').data(_sliders).enter().append('label').attr('class', function (d) {
+	      return 'display-control display-control-' + d;
+	    });
+	    slidersEnter.html(function (d) {
+	      return _t.html('background.' + d);
+	    }).append('span').attr('class', function (d) {
+	      return 'display-option-value display-option-value-' + d;
+	    });
+	    var sildersControlEnter = slidersEnter.append('div').attr('class', 'control-wrap');
+	    sildersControlEnter.append('input').attr('class', function (d) {
+	      return 'display-option-input display-option-input-' + d;
+	    }).attr('type', 'range').attr('min', _minVal).attr('max', _maxVal).attr('step', '0.05').on('input', function (d3_event, d) {
+	      var val = select(this).property('value');
+
+	      if (!val && d3_event && d3_event.target) {
+	        val = d3_event.target.value;
+	      }
 
-	Number.isInteger = Number.isInteger || function (val) {
-	  return typeof val === 'number' &&
-	  isFinite(val) &&
-	  Math.floor(val) === val
-	};
+	      updateValue(d, val);
+	    });
+	    sildersControlEnter.append('button').attr('title', function (d) {
+	      return "".concat(_t('background.reset'), " ").concat(_t('background.' + d));
+	    }).attr('class', function (d) {
+	      return 'display-option-reset display-option-reset-' + d;
+	    }).on('click', function (d3_event, d) {
+	      if (d3_event.button !== 0) return;
+	      updateValue(d, 1);
+	    }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo'))); // reset all button
+
+	    containerEnter.append('a').attr('class', 'display-option-resetlink').attr('role', 'button').attr('href', '#').call(_t.append('background.reset_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+
+	      for (var i = 0; i < _sliders.length; i++) {
+	        updateValue(_sliders[i], 1);
+	      }
+	    }); // update
 
-	Number.parseFloat = Number.parseFloat || parseFloat;
+	    container = containerEnter.merge(container);
+	    container.selectAll('.display-option-input').property('value', function (d) {
+	      return _options[d];
+	    });
+	    container.selectAll('.display-option-value').text(function (d) {
+	      return Math.floor(_options[d] * 100) + '%';
+	    });
+	    container.selectAll('.display-option-reset').classed('disabled', function (d) {
+	      return _options[d] === 1;
+	    }); // first time only, set brightness if needed
 
-	Number.isNaN = Number.isNaN || function (value) {
-	  return value !== value // eslint-disable-line
-	};
+	    if (containerEnter.size() && _options.brightness !== 1) {
+	      context.background().brightness(_options.brightness);
+	    }
+	  }
 
-	/**
-	 * Polyfill for IE support
-	 */
-	Math.trunc = Math.trunc || function (x) {
-	  return x < 0 ? Math.ceil(x) : Math.floor(x)
-	};
+	  return section;
+	}
 
-	var NumberUtil = function NumberUtil () {};
+	function uiSettingsCustomBackground() {
+	  var dispatch = dispatch$8('change');
+
+	  function render(selection) {
+	    // keep separate copies of original and current settings
+	    var _origSettings = {
+	      template: corePreferences('background-custom-template')
+	    };
+	    var _currSettings = {
+	      template: corePreferences('background-custom-template')
+	    };
+	    var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
+	    var modal = uiConfirm(selection).okButton();
+	    modal.classed('settings-modal settings-custom-background', true);
+	    modal.select('.modal-section.header').append('h3').call(_t.append('settings.custom_background.header'));
+	    var textSection = modal.select('.modal-section.message-text');
+	    var instructions = "".concat(_t.html('settings.custom_background.instructions.info'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.wms.tokens_label'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.proj'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.wkid'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.dimensions'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.bbox'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.tms.tokens_label'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.xyz'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.flipped_y'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.switch'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.quadtile'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.scale_factor'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.example'), "\n") + "`".concat(example, "`");
+	    textSection.append('div').attr('class', 'instructions-template').html(marked_1(instructions));
+	    textSection.append('textarea').attr('class', 'field-template').attr('placeholder', _t('settings.custom_background.template.placeholder')).call(utilNoAuto).property('value', _currSettings.template); // insert a cancel button
+
+	    var buttonSection = modal.select('.modal-section.buttons');
+	    buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').call(_t.append('confirm.cancel'));
+	    buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
+	    buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);
+
+	    function isSaveDisabled() {
+	      return null;
+	    } // restore the original template
 
-	NumberUtil.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	NumberUtil.prototype.getClass = function getClass () {
-	  return NumberUtil
-	};
-	NumberUtil.prototype.equalsWithTolerance = function equalsWithTolerance (x1, x2, tolerance) {
-	  return Math.abs(x1 - x2) <= tolerance
-	};
 
-	var IllegalArgumentException = (function (Error) {
-		function IllegalArgumentException (message) {
-			Error.call(this, message);
-			this.name = 'IllegalArgumentException';
-			this.message = message;
-			this.stack = (new Error()).stack;
-		}
-
-		if ( Error ) { IllegalArgumentException.__proto__ = Error; }
-		IllegalArgumentException.prototype = Object.create( Error && Error.prototype );
-		IllegalArgumentException.prototype.constructor = IllegalArgumentException;
-
-		return IllegalArgumentException;
-	}(Error));
-
-	var Double = function Double () {};
-
-	var staticAccessors$1 = { MAX_VALUE: { configurable: true } };
-
-	Double.isNaN = function isNaN (n) { return Number.isNaN(n) };
-	Double.doubleToLongBits = function doubleToLongBits (n) { return n };
-	Double.longBitsToDouble = function longBitsToDouble (n) { return n };
-	Double.isInfinite = function isInfinite (n) { return !Number.isFinite(n) };
-	staticAccessors$1.MAX_VALUE.get = function () { return Number.MAX_VALUE };
-
-	Object.defineProperties( Double, staticAccessors$1 );
-
-	var Comparable = function Comparable () {};
-
-	var Clonable = function Clonable () {};
-
-	var Comparator = function Comparator () {};
-
-	function Serializable () {}
-
-	// import Assert from '../util/Assert'
-
-	var Coordinate = function Coordinate () {
-	  this.x = null;
-	  this.y = null;
-	  this.z = null;
-	  if (arguments.length === 0) {
-	    this.x = 0.0;
-	    this.y = 0.0;
-	    this.z = Coordinate.NULL_ORDINATE;
-	  } else if (arguments.length === 1) {
-	    var c = arguments[0];
-	    this.x = c.x;
-	    this.y = c.y;
-	    this.z = c.z;
-	  } else if (arguments.length === 2) {
-	    this.x = arguments[0];
-	    this.y = arguments[1];
-	    this.z = Coordinate.NULL_ORDINATE;
-	  } else if (arguments.length === 3) {
-	    this.x = arguments[0];
-	    this.y = arguments[1];
-	    this.z = arguments[2];
-	  }
-	};
+	    function clickCancel() {
+	      textSection.select('.field-template').property('value', _origSettings.template);
+	      corePreferences('background-custom-template', _origSettings.template);
+	      this.blur();
+	      modal.close();
+	    } // accept the current template
 
-	var staticAccessors = { DimensionalComparator: { configurable: true },serialVersionUID: { configurable: true },NULL_ORDINATE: { configurable: true },X: { configurable: true },Y: { configurable: true },Z: { configurable: true } };
-	Coordinate.prototype.setOrdinate = function setOrdinate (ordinateIndex, value) {
-	  switch (ordinateIndex) {
-	    case Coordinate.X:
-	      this.x = value;
-	      break
-	    case Coordinate.Y:
-	      this.y = value;
-	      break
-	    case Coordinate.Z:
-	      this.z = value;
-	      break
-	    default:
-	      throw new IllegalArgumentException('Invalid ordinate index: ' + ordinateIndex)
-	  }
-	};
-	Coordinate.prototype.equals2D = function equals2D () {
-	  if (arguments.length === 1) {
-	    var other = arguments[0];
-	    if (this.x !== other.x) {
-	      return false
-	    }
-	    if (this.y !== other.y) {
-	      return false
-	    }
-	    return true
-	  } else if (arguments.length === 2) {
-	    var c = arguments[0];
-	    var tolerance = arguments[1];
-	    if (!NumberUtil.equalsWithTolerance(this.x, c.x, tolerance)) {
-	      return false
-	    }
-	    if (!NumberUtil.equalsWithTolerance(this.y, c.y, tolerance)) {
-	      return false
+
+	    function clickSave() {
+	      _currSettings.template = textSection.select('.field-template').property('value');
+	      corePreferences('background-custom-template', _currSettings.template);
+	      this.blur();
+	      modal.close();
+	      dispatch.call('change', this, _currSettings);
 	    }
-	    return true
-	  }
-	};
-	Coordinate.prototype.getOrdinate = function getOrdinate (ordinateIndex) {
-	  switch (ordinateIndex) {
-	    case Coordinate.X:
-	      return this.x
-	    case Coordinate.Y:
-	      return this.y
-	    case Coordinate.Z:
-	      return this.z
-	  }
-	  throw new IllegalArgumentException('Invalid ordinate index: ' + ordinateIndex)
-	};
-	Coordinate.prototype.equals3D = function equals3D (other) {
-	  return this.x === other.x &&
-	         this.y === other.y &&
-	         ((this.z === other.z || Double.isNaN(this.z)) &&
-	         Double.isNaN(other.z))
-	};
-	Coordinate.prototype.equals = function equals (other) {
-	  if (!(other instanceof Coordinate)) {
-	    return false
-	  }
-	  return this.equals2D(other)
-	};
-	Coordinate.prototype.equalInZ = function equalInZ (c, tolerance) {
-	  return NumberUtil.equalsWithTolerance(this.z, c.z, tolerance)
-	};
-	Coordinate.prototype.compareTo = function compareTo (o) {
-	  var other = o;
-	  if (this.x < other.x) { return -1 }
-	  if (this.x > other.x) { return 1 }
-	  if (this.y < other.y) { return -1 }
-	  if (this.y > other.y) { return 1 }
-	  return 0
-	};
-	Coordinate.prototype.clone = function clone () {
-	  // try {
-	  // var coord = null
-	  // return coord
-	  // } catch (e) {
-	  // if (e instanceof CloneNotSupportedException) {
-	  //   Assert.shouldNeverReachHere("this shouldn't happen because this class is Cloneable")
-	  //   return null
-	  // } else throw e
-	  // } finally {}
-	};
-	Coordinate.prototype.copy = function copy () {
-	  return new Coordinate(this)
-	};
-	Coordinate.prototype.toString = function toString () {
-	  return '(' + this.x + ', ' + this.y + ', ' + this.z + ')'
-	};
-	Coordinate.prototype.distance3D = function distance3D (c) {
-	  var dx = this.x - c.x;
-	  var dy = this.y - c.y;
-	  var dz = this.z - c.z;
-	  return Math.sqrt(dx * dx + dy * dy + dz * dz)
-	};
-	Coordinate.prototype.distance = function distance (c) {
-	  var dx = this.x - c.x;
-	  var dy = this.y - c.y;
-	  return Math.sqrt(dx * dx + dy * dy)
-	};
-	Coordinate.prototype.hashCode = function hashCode () {
-	  var result = 17;
-	  result = 37 * result + Coordinate.hashCode(this.x);
-	  result = 37 * result + Coordinate.hashCode(this.y);
-	  return result
-	};
-	Coordinate.prototype.setCoordinate = function setCoordinate (other) {
-	  this.x = other.x;
-	  this.y = other.y;
-	  this.z = other.z;
-	};
-	Coordinate.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable, Clonable, Serializable]
-	};
-	Coordinate.prototype.getClass = function getClass () {
-	  return Coordinate
-	};
-	Coordinate.hashCode = function hashCode () {
-	  if (arguments.length === 1) {
-	    var x = arguments[0];
-	    var f = Double.doubleToLongBits(x);
-	    return Math.trunc((f ^ f) >>> 32)
-	  }
-	};
-	staticAccessors.DimensionalComparator.get = function () { return DimensionalComparator };
-	staticAccessors.serialVersionUID.get = function () { return 6683108902428366910 };
-	staticAccessors.NULL_ORDINATE.get = function () { return Double.NaN };
-	staticAccessors.X.get = function () { return 0 };
-	staticAccessors.Y.get = function () { return 1 };
-	staticAccessors.Z.get = function () { return 2 };
-
-	Object.defineProperties( Coordinate, staticAccessors );
-
-	var DimensionalComparator = function DimensionalComparator (dimensionsToTest) {
-	  this._dimensionsToTest = 2;
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var dimensionsToTest$1 = arguments[0];
-	    if (dimensionsToTest$1 !== 2 && dimensionsToTest$1 !== 3) { throw new IllegalArgumentException('only 2 or 3 dimensions may be specified') }
-	    this._dimensionsToTest = dimensionsToTest$1;
 	  }
-	};
-	DimensionalComparator.prototype.compare = function compare (o1, o2) {
-	  var c1 = o1;
-	  var c2 = o2;
-	  var compX = DimensionalComparator.compare(c1.x, c2.x);
-	  if (compX !== 0) { return compX }
-	  var compY = DimensionalComparator.compare(c1.y, c2.y);
-	  if (compY !== 0) { return compY }
-	  if (this._dimensionsToTest <= 2) { return 0 }
-	  var compZ = DimensionalComparator.compare(c1.z, c2.z);
-	  return compZ
-	};
-	DimensionalComparator.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparator]
-	};
-	DimensionalComparator.prototype.getClass = function getClass () {
-	  return DimensionalComparator
-	};
-	DimensionalComparator.compare = function compare (a, b) {
-	  if (a < b) { return -1 }
-	  if (a > b) { return 1 }
-	  if (Double.isNaN(a)) {
-	    if (Double.isNaN(b)) { return 0 }
-	    return -1
-	  }
-	  if (Double.isNaN(b)) { return 1 }
-	  return 0
-	};
 
-	// import hasInterface from '../../../../hasInterface'
-	// import CoordinateSequence from './CoordinateSequence'
-
-	var CoordinateSequenceFactory = function CoordinateSequenceFactory () {};
+	  return utilRebind(render, dispatch, 'on');
+	}
 
-	CoordinateSequenceFactory.prototype.create = function create () {
-	  // if (arguments.length === 1) {
-	  // if (arguments[0] instanceof Array) {
-	  //   let coordinates = arguments[0]
-	  // } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	  //   let coordSeq = arguments[0]
-	  // }
-	  // } else if (arguments.length === 2) {
-	  // let size = arguments[0]
-	  // let dimension = arguments[1]
-	  // }
-	};
-	CoordinateSequenceFactory.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateSequenceFactory.prototype.getClass = function getClass () {
-	  return CoordinateSequenceFactory
-	};
+	function uiSectionBackgroundList(context) {
+	  var _backgroundList = select(null);
 
-	var Location = function Location () {};
+	  var _customSource = context.background().findSource('custom');
 
-	var staticAccessors$4 = { INTERIOR: { configurable: true },BOUNDARY: { configurable: true },EXTERIOR: { configurable: true },NONE: { configurable: true } };
+	  var _settingsCustomBackground = uiSettingsCustomBackground().on('change', customChanged);
 
-	Location.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Location.prototype.getClass = function getClass () {
-	  return Location
-	};
-	Location.toLocationSymbol = function toLocationSymbol (locationValue) {
-	  switch (locationValue) {
-	    case Location.EXTERIOR:
-	      return 'e'
-	    case Location.BOUNDARY:
-	      return 'b'
-	    case Location.INTERIOR:
-	      return 'i'
-	    case Location.NONE:
-	      return '-'
-	  }
-	  throw new IllegalArgumentException('Unknown location value: ' + locationValue)
-	};
-	staticAccessors$4.INTERIOR.get = function () { return 0 };
-	staticAccessors$4.BOUNDARY.get = function () { return 1 };
-	staticAccessors$4.EXTERIOR.get = function () { return 2 };
-	staticAccessors$4.NONE.get = function () { return -1 };
+	  var section = uiSection('background-list', context).label(_t.html('background.backgrounds')).disclosureContent(renderDisclosureContent);
 
-	Object.defineProperties( Location, staticAccessors$4 );
+	  function previousBackgroundID() {
+	    return corePreferences('background-last-used-toggle');
+	  }
 
-	var hasInterface = function (o, i) {
-	  return o.interfaces_ && o.interfaces_().indexOf(i) > -1
-	};
+	  function renderDisclosureContent(selection) {
+	    // the background list
+	    var container = selection.selectAll('.layer-background-list').data([0]);
+	    _backgroundList = container.enter().append('ul').attr('class', 'layer-list layer-background-list').attr('dir', 'auto').merge(container); // add minimap toggle below list
 
-	var MathUtil = function MathUtil () {};
+	    var bgExtrasListEnter = selection.selectAll('.bg-extras-list').data([0]).enter().append('ul').attr('class', 'layer-list bg-extras-list');
+	    var minimapLabelEnter = bgExtrasListEnter.append('li').attr('class', 'minimap-toggle-item').append('label').call(uiTooltip().title(_t.html('background.minimap.tooltip')).keys([_t('background.minimap.key')]).placement('top'));
+	    minimapLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      uiMapInMap.toggle();
+	    });
+	    minimapLabelEnter.append('span').call(_t.append('background.minimap.description'));
+	    var panelLabelEnter = bgExtrasListEnter.append('li').attr('class', 'background-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('background.panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.background.key'))]).placement('top'));
+	    panelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.ui().info.toggle('background');
+	    });
+	    panelLabelEnter.append('span').call(_t.append('background.panel.description'));
+	    var locPanelLabelEnter = bgExtrasListEnter.append('li').attr('class', 'location-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('background.location_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.location.key'))]).placement('top'));
+	    locPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.ui().info.toggle('location');
+	    });
+	    locPanelLabelEnter.append('span').call(_t.append('background.location_panel.description')); // "Info / Report a Problem" link
 
-	var staticAccessors$5 = { LOG_10: { configurable: true } };
+	    selection.selectAll('.imagery-faq').data([0]).enter().append('div').attr('class', 'imagery-faq').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/openstreetmap/iD/blob/develop/FAQ.md#how-can-i-report-an-issue-with-background-imagery').append('span').call(_t.append('background.imagery_problem_faq'));
 
-	MathUtil.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MathUtil.prototype.getClass = function getClass () {
-	  return MathUtil
-	};
-	MathUtil.log10 = function log10 (x) {
-	  var ln = Math.log(x);
-	  if (Double.isInfinite(ln)) { return ln }
-	  if (Double.isNaN(ln)) { return ln }
-	  return ln / MathUtil.LOG_10
-	};
-	MathUtil.min = function min (v1, v2, v3, v4) {
-	  var min = v1;
-	  if (v2 < min) { min = v2; }
-	  if (v3 < min) { min = v3; }
-	  if (v4 < min) { min = v4; }
-	  return min
-	};
-	MathUtil.clamp = function clamp () {
-	  if (typeof arguments[2] === 'number' && (typeof arguments[0] === 'number' && typeof arguments[1] === 'number')) {
-	    var x = arguments[0];
-	    var min = arguments[1];
-	    var max = arguments[2];
-	    if (x < min) { return min }
-	    if (x > max) { return max }
-	    return x
-	  } else if (Number.isInteger(arguments[2]) && (Number.isInteger(arguments[0]) && Number.isInteger(arguments[1]))) {
-	    var x$1 = arguments[0];
-	    var min$1 = arguments[1];
-	    var max$1 = arguments[2];
-	    if (x$1 < min$1) { return min$1 }
-	    if (x$1 > max$1) { return max$1 }
-	    return x$1
-	  }
-	};
-	MathUtil.wrap = function wrap (index, max) {
-	  if (index < 0) {
-	    return max - -index % max
+	    _backgroundList.call(drawListItems, 'radio', function (d3_event, d) {
+	      chooseBackground(d);
+	    }, function (d) {
+	      return !d.isHidden() && !d.overlay;
+	    });
 	  }
-	  return index % max
-	};
-	MathUtil.max = function max () {
-	  if (arguments.length === 3) {
-	    var v1 = arguments[0];
-	    var v2 = arguments[1];
-	    var v3 = arguments[2];
-	    var max = v1;
-	    if (v2 > max) { max = v2; }
-	    if (v3 > max) { max = v3; }
-	    return max
-	  } else if (arguments.length === 4) {
-	    var v1$1 = arguments[0];
-	    var v2$1 = arguments[1];
-	    var v3$1 = arguments[2];
-	    var v4 = arguments[3];
-	    var max$1 = v1$1;
-	    if (v2$1 > max$1) { max$1 = v2$1; }
-	    if (v3$1 > max$1) { max$1 = v3$1; }
-	    if (v4 > max$1) { max$1 = v4; }
-	    return max$1
+
+	  function setTooltips(selection) {
+	    selection.each(function (d, i, nodes) {
+	      var item = select(this).select('label');
+	      var span = item.select('span');
+	      var placement = i < nodes.length / 2 ? 'bottom' : 'top';
+	      var description = d.description();
+	      var isOverflowing = span.property('clientWidth') !== span.property('scrollWidth');
+	      item.call(uiTooltip().destroyAny);
+
+	      if (d.id === previousBackgroundID()) {
+	        item.call(uiTooltip().placement(placement).title('<div>' + _t.html('background.switch') + '</div>').keys([uiCmd('⌘' + _t('background.key'))]));
+	      } else if (description || isOverflowing) {
+	        item.call(uiTooltip().placement(placement).title(description || d.label()));
+	      }
+	    });
 	  }
-	};
-	MathUtil.average = function average (x1, x2) {
-	  return (x1 + x2) / 2.0
-	};
-	staticAccessors$5.LOG_10.get = function () { return Math.log(10) };
 
-	Object.defineProperties( MathUtil, staticAccessors$5 );
+	  function drawListItems(layerList, type, change, filter) {
+	    var sources = context.background().sources(context.map().extent(), context.map().zoom(), true).filter(filter).sort(function (a, b) {
+	      return a.best() && !b.best() ? -1 : b.best() && !a.best() ? 1 : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
+	    });
+	    var layerLinks = layerList.selectAll('li') // We have to be a bit inefficient about reordering the list since
+	    // arrow key navigation of radio values likes to work in the order
+	    // they were added, not the display document order.
+	    .data(sources, function (d, i) {
+	      return d.id + '---' + i;
+	    });
+	    layerLinks.exit().remove();
+	    var enter = layerLinks.enter().append('li').classed('layer-custom', function (d) {
+	      return d.id === 'custom';
+	    }).classed('best', function (d) {
+	      return d.best();
+	    });
+	    var label = enter.append('label');
+	    label.append('input').attr('type', type).attr('name', 'background-layer').attr('value', function (d) {
+	      return d.id;
+	    }).on('change', change);
+	    label.append('span').html(function (d) {
+	      return d.label();
+	    });
+	    enter.filter(function (d) {
+	      return d.id === 'custom';
+	    }).append('button').attr('class', 'layer-browse').call(uiTooltip().title(_t.html('settings.custom_background.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      editCustom();
+	    }).call(svgIcon('#iD-icon-more'));
+	    enter.filter(function (d) {
+	      return d.best();
+	    }).append('div').attr('class', 'best').call(uiTooltip().title(_t.html('background.best_imagery')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).append('span').html('&#9733;');
+	    layerList.call(updateLayerSelections);
+	  }
 
-	var StringBuffer = function StringBuffer (str) {
-	  this.str = str;
-	};
-	StringBuffer.prototype.append = function append (e) {
-	  this.str += e;
-	};
+	  function updateLayerSelections(selection) {
+	    function active(d) {
+	      return context.background().showsLayer(d);
+	    }
 
-	StringBuffer.prototype.setCharAt = function setCharAt (i, c) {
-	  this.str = this.str.substr(0, i) + c + this.str.substr(i + 1);
-	};
+	    selection.selectAll('li').classed('active', active).classed('switch', function (d) {
+	      return d.id === previousBackgroundID();
+	    }).call(setTooltips).selectAll('input').property('checked', active);
+	  }
 
-	StringBuffer.prototype.toString = function toString (e) {
-	  return this.str
-	};
+	  function chooseBackground(d) {
+	    if (d.id === 'custom' && !d.template()) {
+	      return editCustom();
+	    }
 
-	var Integer = function Integer (value) {
-	  this.value = value;
-	};
-	Integer.prototype.intValue = function intValue () {
-	  return this.value
-	};
-	Integer.prototype.compareTo = function compareTo (o) {
-	  if (this.value < o) { return -1 }
-	  if (this.value > o) { return 1 }
-	  return 0
-	};
-	Integer.isNaN = function isNaN (n) { return Number.isNaN(n) };
-
-	var Character = function Character () {};
-
-	Character.isWhitespace = function isWhitespace (c) { return ((c <= 32 && c >= 0) || c === 127) };
-	Character.toUpperCase = function toUpperCase (c) { return c.toUpperCase() };
-
-	var DD = function DD () {
-	  this._hi = 0.0;
-	  this._lo = 0.0;
-	  if (arguments.length === 0) {
-	    this.init(0.0);
-	  } else if (arguments.length === 1) {
-	    if (typeof arguments[0] === 'number') {
-	      var x = arguments[0];
-	      this.init(x);
-	    } else if (arguments[0] instanceof DD) {
-	      var dd = arguments[0];
-	      this.init(dd);
-	    } else if (typeof arguments[0] === 'string') {
-	      var str = arguments[0];
-	      DD.call(this, DD.parse(str));
-	    }
-	  } else if (arguments.length === 2) {
-	    var hi = arguments[0];
-	    var lo = arguments[1];
-	    this.init(hi, lo);
+	    var previousBackground = context.background().baseLayerSource();
+	    corePreferences('background-last-used-toggle', previousBackground.id);
+	    corePreferences('background-last-used', d.id);
+	    context.background().baseLayerSource(d);
 	  }
-	};
 
-	var staticAccessors$7 = { PI: { configurable: true },TWO_PI: { configurable: true },PI_2: { configurable: true },E: { configurable: true },NaN: { configurable: true },EPS: { configurable: true },SPLIT: { configurable: true },MAX_PRINT_DIGITS: { configurable: true },TEN: { configurable: true },ONE: { configurable: true },SCI_NOT_EXPONENT_CHAR: { configurable: true },SCI_NOT_ZERO: { configurable: true } };
-	DD.prototype.le = function le (y) {
-	  return (this._hi < y._hi || this._hi === y._hi) && this._lo <= y._lo
-	};
-	DD.prototype.extractSignificantDigits = function extractSignificantDigits (insertDecimalPoint, magnitude) {
-	  var y = this.abs();
-	  var mag = DD.magnitude(y._hi);
-	  var scale = DD.TEN.pow(mag);
-	  y = y.divide(scale);
-	  if (y.gt(DD.TEN)) {
-	    y = y.divide(DD.TEN);
-	    mag += 1;
-	  } else if (y.lt(DD.ONE)) {
-	    y = y.multiply(DD.TEN);
-	    mag -= 1;
-	  }
-	  var decimalPointPos = mag + 1;
-	  var buf = new StringBuffer();
-	  var numDigits = DD.MAX_PRINT_DIGITS - 1;
-	  for (var i = 0; i <= numDigits; i++) {
-	    if (insertDecimalPoint && i === decimalPointPos) {
-	      buf.append('.');
-	    }
-	    var digit = Math.trunc(y._hi);
-	    if (digit < 0) {
-	      break
-	    }
-	    var rebiasBy10 = false;
-	    var digitChar = 0;
-	    if (digit > 9) {
-	      rebiasBy10 = true;
-	      digitChar = '9';
+	  function customChanged(d) {
+	    if (d && d.template) {
+	      _customSource.template(d.template);
+
+	      chooseBackground(_customSource);
 	    } else {
-	      digitChar = '0' + digit;
-	    }
-	    buf.append(digitChar);
-	    y = y.subtract(DD.valueOf(digit)).multiply(DD.TEN);
-	    if (rebiasBy10) { y.selfAdd(DD.TEN); }
-	    var continueExtractingDigits = true;
-	    var remMag = DD.magnitude(y._hi);
-	    if (remMag < 0 && Math.abs(remMag) >= numDigits - i) { continueExtractingDigits = false; }
-	    if (!continueExtractingDigits) { break }
-	  }
-	  magnitude[0] = mag;
-	  return buf.toString()
-	};
-	DD.prototype.sqr = function sqr () {
-	  return this.multiply(this)
-	};
-	DD.prototype.doubleValue = function doubleValue () {
-	  return this._hi + this._lo
-	};
-	DD.prototype.subtract = function subtract () {
-	  if (arguments[0] instanceof DD) {
-	    var y = arguments[0];
-	    return this.add(y.negate())
-	  } else if (typeof arguments[0] === 'number') {
-	    var y$1 = arguments[0];
-	    return this.add(-y$1)
-	  }
-	};
-	DD.prototype.equals = function equals () {
-	  if (arguments.length === 1) {
-	    var y = arguments[0];
-	    return this._hi === y._hi && this._lo === y._lo
-	  }
-	};
-	DD.prototype.isZero = function isZero () {
-	  return this._hi === 0.0 && this._lo === 0.0
-	};
-	DD.prototype.selfSubtract = function selfSubtract () {
-	  if (arguments[0] instanceof DD) {
-	    var y = arguments[0];
-	    if (this.isNaN()) { return this }
-	    return this.selfAdd(-y._hi, -y._lo)
-	  } else if (typeof arguments[0] === 'number') {
-	    var y$1 = arguments[0];
-	    if (this.isNaN()) { return this }
-	    return this.selfAdd(-y$1, 0.0)
-	  }
-	};
-	DD.prototype.getSpecialNumberString = function getSpecialNumberString () {
-	  if (this.isZero()) { return '0.0' }
-	  if (this.isNaN()) { return 'NaN ' }
-	  return null
-	};
-	DD.prototype.min = function min (x) {
-	  if (this.le(x)) {
-	    return this
-	  } else {
-	    return x
-	  }
-	};
-	DD.prototype.selfDivide = function selfDivide () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof DD) {
-	      var y = arguments[0];
-	      return this.selfDivide(y._hi, y._lo)
-	    } else if (typeof arguments[0] === 'number') {
-	      var y$1 = arguments[0];
-	      return this.selfDivide(y$1, 0.0)
-	    }
-	  } else if (arguments.length === 2) {
-	    var yhi = arguments[0];
-	    var ylo = arguments[1];
-	    var hc = null;
-	    var tc = null;
-	    var hy = null;
-	    var ty = null;
-	    var C = null;
-	    var c = null;
-	    var U = null;
-	    var u = null;
-	    C = this._hi / yhi;
-	    c = DD.SPLIT * C;
-	    hc = c - C;
-	    u = DD.SPLIT * yhi;
-	    hc = c - hc;
-	    tc = C - hc;
-	    hy = u - yhi;
-	    U = C * yhi;
-	    hy = u - hy;
-	    ty = yhi - hy;
-	    u = hc * hy - U + hc * ty + tc * hy + tc * ty;
-	    c = (this._hi - U - u + this._lo - C * ylo) / yhi;
-	    u = C + c;
-	    this._hi = u;
-	    this._lo = C - u + c;
-	    return this
-	  }
-	};
-	DD.prototype.dump = function dump () {
-	  return 'DD<' + this._hi + ', ' + this._lo + '>'
-	};
-	DD.prototype.divide = function divide () {
-	  if (arguments[0] instanceof DD) {
-	    var y = arguments[0];
-	    var hc = null;
-	    var tc = null;
-	    var hy = null;
-	    var ty = null;
-	    var C = null;
-	    var c = null;
-	    var U = null;
-	    var u = null;
-	    C = this._hi / y._hi;
-	    c = DD.SPLIT * C;
-	    hc = c - C;
-	    u = DD.SPLIT * y._hi;
-	    hc = c - hc;
-	    tc = C - hc;
-	    hy = u - y._hi;
-	    U = C * y._hi;
-	    hy = u - hy;
-	    ty = y._hi - hy;
-	    u = hc * hy - U + hc * ty + tc * hy + tc * ty;
-	    c = (this._hi - U - u + this._lo - C * y._lo) / y._hi;
-	    u = C + c;
-	    var zhi = u;
-	    var zlo = C - u + c;
-	    return new DD(zhi, zlo)
-	  } else if (typeof arguments[0] === 'number') {
-	    var y$1 = arguments[0];
-	    if (Double.isNaN(y$1)) { return DD.createNaN() }
-	    return DD.copy(this).selfDivide(y$1, 0.0)
-	  }
-	};
-	DD.prototype.ge = function ge (y) {
-	  return (this._hi > y._hi || this._hi === y._hi) && this._lo >= y._lo
-	};
-	DD.prototype.pow = function pow (exp) {
-	  if (exp === 0.0) { return DD.valueOf(1.0) }
-	  var r = new DD(this);
-	  var s = DD.valueOf(1.0);
-	  var n = Math.abs(exp);
-	  if (n > 1) {
-	    while (n > 0) {
-	      if (n % 2 === 1) {
-	        s.selfMultiply(r);
-	      }
-	      n /= 2;
-	      if (n > 0) { r = r.sqr(); }
+	      _customSource.template('');
+
+	      chooseBackground(context.background().findSource('none'));
 	    }
-	  } else {
-	    s = r;
-	  }
-	  if (exp < 0) { return s.reciprocal() }
-	  return s
-	};
-	DD.prototype.ceil = function ceil () {
-	  if (this.isNaN()) { return DD.NaN }
-	  var fhi = Math.ceil(this._hi);
-	  var flo = 0.0;
-	  if (fhi === this._hi) {
-	    flo = Math.ceil(this._lo);
-	  }
-	  return new DD(fhi, flo)
-	};
-	DD.prototype.compareTo = function compareTo (o) {
-	  var other = o;
-	  if (this._hi < other._hi) { return -1 }
-	  if (this._hi > other._hi) { return 1 }
-	  if (this._lo < other._lo) { return -1 }
-	  if (this._lo > other._lo) { return 1 }
-	  return 0
-	};
-	DD.prototype.rint = function rint () {
-	  if (this.isNaN()) { return this }
-	  var plus5 = this.add(0.5);
-	  return plus5.floor()
-	};
-	DD.prototype.setValue = function setValue () {
-	  if (arguments[0] instanceof DD) {
-	    var value = arguments[0];
-	    this.init(value);
-	    return this
-	  } else if (typeof arguments[0] === 'number') {
-	    var value$1 = arguments[0];
-	    this.init(value$1);
-	    return this
-	  }
-	};
-	DD.prototype.max = function max (x) {
-	  if (this.ge(x)) {
-	    return this
-	  } else {
-	    return x
-	  }
-	};
-	DD.prototype.sqrt = function sqrt () {
-	  if (this.isZero()) { return DD.valueOf(0.0) }
-	  if (this.isNegative()) {
-	    return DD.NaN
-	  }
-	  var x = 1.0 / Math.sqrt(this._hi);
-	  var ax = this._hi * x;
-	  var axdd = DD.valueOf(ax);
-	  var diffSq = this.subtract(axdd.sqr());
-	  var d2 = diffSq._hi * (x * 0.5);
-	  return axdd.add(d2)
-	};
-	DD.prototype.selfAdd = function selfAdd () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof DD) {
-	      var y = arguments[0];
-	      return this.selfAdd(y._hi, y._lo)
-	    } else if (typeof arguments[0] === 'number') {
-	      var y$1 = arguments[0];
-	      var H = null;
-	      var h = null;
-	      var S = null;
-	      var s = null;
-	      var e = null;
-	      var f = null;
-	      S = this._hi + y$1;
-	      e = S - this._hi;
-	      s = S - e;
-	      s = y$1 - e + (this._hi - s);
-	      f = s + this._lo;
-	      H = S + f;
-	      h = f + (S - H);
-	      this._hi = H + h;
-	      this._lo = h + (H - this._hi);
-	      return this
-	    }
-	  } else if (arguments.length === 2) {
-	    var yhi = arguments[0];
-	    var ylo = arguments[1];
-	    var H$1 = null;
-	    var h$1 = null;
-	    var T = null;
-	    var t = null;
-	    var S$1 = null;
-	    var s$1 = null;
-	    var e$1 = null;
-	    var f$1 = null;
-	    S$1 = this._hi + yhi;
-	    T = this._lo + ylo;
-	    e$1 = S$1 - this._hi;
-	    f$1 = T - this._lo;
-	    s$1 = S$1 - e$1;
-	    t = T - f$1;
-	    s$1 = yhi - e$1 + (this._hi - s$1);
-	    t = ylo - f$1 + (this._lo - t);
-	    e$1 = s$1 + T;
-	    H$1 = S$1 + e$1;
-	    h$1 = e$1 + (S$1 - H$1);
-	    e$1 = t + h$1;
-	    var zhi = H$1 + e$1;
-	    var zlo = e$1 + (H$1 - zhi);
-	    this._hi = zhi;
-	    this._lo = zlo;
-	    return this
-	  }
-	};
-	DD.prototype.selfMultiply = function selfMultiply () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof DD) {
-	      var y = arguments[0];
-	      return this.selfMultiply(y._hi, y._lo)
-	    } else if (typeof arguments[0] === 'number') {
-	      var y$1 = arguments[0];
-	      return this.selfMultiply(y$1, 0.0)
-	    }
-	  } else if (arguments.length === 2) {
-	    var yhi = arguments[0];
-	    var ylo = arguments[1];
-	    var hx = null;
-	    var tx = null;
-	    var hy = null;
-	    var ty = null;
-	    var C = null;
-	    var c = null;
-	    C = DD.SPLIT * this._hi;
-	    hx = C - this._hi;
-	    c = DD.SPLIT * yhi;
-	    hx = C - hx;
-	    tx = this._hi - hx;
-	    hy = c - yhi;
-	    C = this._hi * yhi;
-	    hy = c - hy;
-	    ty = yhi - hy;
-	    c = hx * hy - C + hx * ty + tx * hy + tx * ty + (this._hi * ylo + this._lo * yhi);
-	    var zhi = C + c;
-	    hx = C - zhi;
-	    var zlo = c + hx;
-	    this._hi = zhi;
-	    this._lo = zlo;
-	    return this
 	  }
-	};
-	DD.prototype.selfSqr = function selfSqr () {
-	  return this.selfMultiply(this)
-	};
-	DD.prototype.floor = function floor () {
-	  if (this.isNaN()) { return DD.NaN }
-	  var fhi = Math.floor(this._hi);
-	  var flo = 0.0;
-	  if (fhi === this._hi) {
-	    flo = Math.floor(this._lo);
-	  }
-	  return new DD(fhi, flo)
-	};
-	DD.prototype.negate = function negate () {
-	  if (this.isNaN()) { return this }
-	  return new DD(-this._hi, -this._lo)
-	};
-	DD.prototype.clone = function clone () {
-	  // try {
-	  // return null
-	  // } catch (ex) {
-	  // if (ex instanceof CloneNotSupportedException) {
-	  //   return null
-	  // } else throw ex
-	  // } finally {}
-	};
-	DD.prototype.multiply = function multiply () {
-	  if (arguments[0] instanceof DD) {
-	    var y = arguments[0];
-	    if (y.isNaN()) { return DD.createNaN() }
-	    return DD.copy(this).selfMultiply(y)
-	  } else if (typeof arguments[0] === 'number') {
-	    var y$1 = arguments[0];
-	    if (Double.isNaN(y$1)) { return DD.createNaN() }
-	    return DD.copy(this).selfMultiply(y$1, 0.0)
+
+	  function editCustom() {
+	    context.container().call(_settingsCustomBackground);
 	  }
-	};
-	DD.prototype.isNaN = function isNaN () {
-	  return Double.isNaN(this._hi)
-	};
-	DD.prototype.intValue = function intValue () {
-	  return Math.trunc(this._hi)
-	};
-	DD.prototype.toString = function toString () {
-	  var mag = DD.magnitude(this._hi);
-	  if (mag >= -3 && mag <= 20) { return this.toStandardNotation() }
-	  return this.toSciNotation()
-	};
-	DD.prototype.toStandardNotation = function toStandardNotation () {
-	  var specialStr = this.getSpecialNumberString();
-	  if (specialStr !== null) { return specialStr }
-	  var magnitude = new Array(1).fill(null);
-	  var sigDigits = this.extractSignificantDigits(true, magnitude);
-	  var decimalPointPos = magnitude[0] + 1;
-	  var num = sigDigits;
-	  if (sigDigits.charAt(0) === '.') {
-	    num = '0' + sigDigits;
-	  } else if (decimalPointPos < 0) {
-	    num = '0.' + DD.stringOfChar('0', -decimalPointPos) + sigDigits;
-	  } else if (sigDigits.indexOf('.') === -1) {
-	    var numZeroes = decimalPointPos - sigDigits.length;
-	    var zeroes = DD.stringOfChar('0', numZeroes);
-	    num = sigDigits + zeroes + '.0';
-	  }
-	  if (this.isNegative()) { return '-' + num }
-	  return num
-	};
-	DD.prototype.reciprocal = function reciprocal () {
-	  var hc = null;
-	  var tc = null;
-	  var hy = null;
-	  var ty = null;
-	  var C = null;
-	  var c = null;
-	  var U = null;
-	  var u = null;
-	  C = 1.0 / this._hi;
-	  c = DD.SPLIT * C;
-	  hc = c - C;
-	  u = DD.SPLIT * this._hi;
-	  hc = c - hc;
-	  tc = C - hc;
-	  hy = u - this._hi;
-	  U = C * this._hi;
-	  hy = u - hy;
-	  ty = this._hi - hy;
-	  u = hc * hy - U + hc * ty + tc * hy + tc * ty;
-	  c = (1.0 - U - u - C * this._lo) / this._hi;
-	  var zhi = C + c;
-	  var zlo = C - zhi + c;
-	  return new DD(zhi, zlo)
-	};
-	DD.prototype.toSciNotation = function toSciNotation () {
-	  if (this.isZero()) { return DD.SCI_NOT_ZERO }
-	  var specialStr = this.getSpecialNumberString();
-	  if (specialStr !== null) { return specialStr }
-	  var magnitude = new Array(1).fill(null);
-	  var digits = this.extractSignificantDigits(false, magnitude);
-	  var expStr = DD.SCI_NOT_EXPONENT_CHAR + magnitude[0];
-	  if (digits.charAt(0) === '0') {
-	    throw new Error('Found leading zero: ' + digits)
-	  }
-	  var trailingDigits = '';
-	  if (digits.length > 1) { trailingDigits = digits.substring(1); }
-	  var digitsWithDecimal = digits.charAt(0) + '.' + trailingDigits;
-	  if (this.isNegative()) { return '-' + digitsWithDecimal + expStr }
-	  return digitsWithDecimal + expStr
-	};
-	DD.prototype.abs = function abs () {
-	  if (this.isNaN()) { return DD.NaN }
-	  if (this.isNegative()) { return this.negate() }
-	  return new DD(this)
-	};
-	DD.prototype.isPositive = function isPositive () {
-	  return (this._hi > 0.0 || this._hi === 0.0) && this._lo > 0.0
-	};
-	DD.prototype.lt = function lt (y) {
-	  return (this._hi < y._hi || this._hi === y._hi) && this._lo < y._lo
-	};
-	DD.prototype.add = function add () {
-	  if (arguments[0] instanceof DD) {
-	    var y = arguments[0];
-	    return DD.copy(this).selfAdd(y)
-	  } else if (typeof arguments[0] === 'number') {
-	    var y$1 = arguments[0];
-	    return DD.copy(this).selfAdd(y$1)
+
+	  context.background().on('change.background_list', function () {
+	    _backgroundList.call(updateLayerSelections);
+	  });
+	  context.map().on('move.background_list', debounce(function () {
+	    // layers in-view may have changed due to map move
+	    window.requestIdleCallback(section.reRender);
+	  }, 1000));
+	  return section;
+	}
+
+	function uiSectionBackgroundOffset(context) {
+	  var section = uiSection('background-offset', context).label(_t.html('background.fix_misalignment')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+
+	  var _directions = [['top', [0, -0.5]], ['left', [-0.5, 0]], ['right', [0.5, 0]], ['bottom', [0, 0.5]]];
+
+	  function updateValue() {
+	    var meters = geoOffsetToMeters(context.background().offset());
+	    var x = +meters[0].toFixed(2);
+	    var y = +meters[1].toFixed(2);
+	    context.container().selectAll('.nudge-inner-rect').select('input').classed('error', false).property('value', x + ', ' + y);
+	    context.container().selectAll('.nudge-reset').classed('disabled', function () {
+	      return x === 0 && y === 0;
+	    });
 	  }
-	};
-	DD.prototype.init = function init () {
-	  if (arguments.length === 1) {
-	    if (typeof arguments[0] === 'number') {
-	      var x = arguments[0];
-	      this._hi = x;
-	      this._lo = 0.0;
-	    } else if (arguments[0] instanceof DD) {
-	      var dd = arguments[0];
-	      this._hi = dd._hi;
-	      this._lo = dd._lo;
-	    }
-	  } else if (arguments.length === 2) {
-	    var hi = arguments[0];
-	    var lo = arguments[1];
-	    this._hi = hi;
-	    this._lo = lo;
+
+	  function resetOffset() {
+	    context.background().offset([0, 0]);
+	    updateValue();
 	  }
-	};
-	DD.prototype.gt = function gt (y) {
-	  return (this._hi > y._hi || this._hi === y._hi) && this._lo > y._lo
-	};
-	DD.prototype.isNegative = function isNegative () {
-	  return (this._hi < 0.0 || this._hi === 0.0) && this._lo < 0.0
-	};
-	DD.prototype.trunc = function trunc () {
-	  if (this.isNaN()) { return DD.NaN }
-	  if (this.isPositive()) { return this.floor(); } else { return this.ceil() }
-	};
-	DD.prototype.signum = function signum () {
-	  if (this._hi > 0) { return 1 }
-	  if (this._hi < 0) { return -1 }
-	  if (this._lo > 0) { return 1 }
-	  if (this._lo < 0) { return -1 }
-	  return 0
-	};
-	DD.prototype.interfaces_ = function interfaces_ () {
-	  return [Serializable, Comparable, Clonable]
-	};
-	DD.prototype.getClass = function getClass () {
-	  return DD
-	};
-	DD.sqr = function sqr (x) {
-	  return DD.valueOf(x).selfMultiply(x)
-	};
-	DD.valueOf = function valueOf () {
-	  if (typeof arguments[0] === 'string') {
-	    var str = arguments[0];
-	    return DD.parse(str)
-	  } else if (typeof arguments[0] === 'number') {
-	    var x = arguments[0];
-	    return new DD(x)
+
+	  function nudge(d) {
+	    context.background().nudge(d, context.map().zoom());
+	    updateValue();
 	  }
-	};
-	DD.sqrt = function sqrt (x) {
-	  return DD.valueOf(x).sqrt()
-	};
-	DD.parse = function parse (str) {
-	  var i = 0;
-	  var strlen = str.length;
-	  while (Character.isWhitespace(str.charAt(i))) { i++; }
-	  var isNegative = false;
-	  if (i < strlen) {
-	    var signCh = str.charAt(i);
-	    if (signCh === '-' || signCh === '+') {
-	      i++;
-	      if (signCh === '-') { isNegative = true; }
+
+	  function inputOffset() {
+	    var input = select(this);
+	    var d = input.node().value;
+	    if (d === '') return resetOffset();
+	    d = d.replace(/;/g, ',').split(',').map(function (n) {
+	      // if n is NaN, it will always get mapped to false.
+	      return !isNaN(n) && n;
+	    });
+
+	    if (d.length !== 2 || !d[0] || !d[1]) {
+	      input.classed('error', true);
+	      return;
 	    }
+
+	    context.background().offset(geoMetersToOffset(d));
+	    updateValue();
 	  }
-	  var val = new DD();
-	  var numDigits = 0;
-	  var numBeforeDec = 0;
-	  var exp = 0;
-	  while (true) {
-	    if (i >= strlen) { break }
-	    var ch = str.charAt(i);
-	    i++;
-	    if (Character.isDigit(ch)) {
-	      var d = ch - '0';
-	      val.selfMultiply(DD.TEN);
-	      val.selfAdd(d);
-	      numDigits++;
-	      continue
-	    }
-	    if (ch === '.') {
-	      numBeforeDec = numDigits;
-	      continue
-	    }
-	    if (ch === 'e' || ch === 'E') {
-	      var expStr = str.substring(i);
-	      try {
-	        exp = Integer.parseInt(expStr);
-	      } catch (ex) {
-	        if (ex instanceof Error) {
-	          throw new Error('Invalid exponent ' + expStr + ' in string ' + str)
-	        } else { throw ex }
-	      } finally {}
-	      break
-	    }
-	    throw new Error("Unexpected character '" + ch + "' at position " + i + ' in string ' + str)
-	  }
-	  var val2 = val;
-	  var numDecPlaces = numDigits - numBeforeDec - exp;
-	  if (numDecPlaces === 0) {
-	    val2 = val;
-	  } else if (numDecPlaces > 0) {
-	    var scale = DD.TEN.pow(numDecPlaces);
-	    val2 = val.divide(scale);
-	  } else if (numDecPlaces < 0) {
-	    var scale$1 = DD.TEN.pow(-numDecPlaces);
-	    val2 = val.multiply(scale$1);
-	  }
-	  if (isNegative) {
-	    return val2.negate()
-	  }
-	  return val2
-	};
-	DD.createNaN = function createNaN () {
-	  return new DD(Double.NaN, Double.NaN)
-	};
-	DD.copy = function copy (dd) {
-	  return new DD(dd)
-	};
-	DD.magnitude = function magnitude (x) {
-	  var xAbs = Math.abs(x);
-	  var xLog10 = Math.log(xAbs) / Math.log(10);
-	  var xMag = Math.trunc(Math.floor(xLog10));
-	  var xApprox = Math.pow(10, xMag);
-	  if (xApprox * 10 <= xAbs) { xMag += 1; }
-	  return xMag
-	};
-	DD.stringOfChar = function stringOfChar (ch, len) {
-	  var buf = new StringBuffer();
-	  for (var i = 0; i < len; i++) {
-	    buf.append(ch);
-	  }
-	  return buf.toString()
-	};
-	staticAccessors$7.PI.get = function () { return new DD(3.141592653589793116e+00, 1.224646799147353207e-16) };
-	staticAccessors$7.TWO_PI.get = function () { return new DD(6.283185307179586232e+00, 2.449293598294706414e-16) };
-	staticAccessors$7.PI_2.get = function () { return new DD(1.570796326794896558e+00, 6.123233995736766036e-17) };
-	staticAccessors$7.E.get = function () { return new DD(2.718281828459045091e+00, 1.445646891729250158e-16) };
-	staticAccessors$7.NaN.get = function () { return new DD(Double.NaN, Double.NaN) };
-	staticAccessors$7.EPS.get = function () { return 1.23259516440783e-32 };
-	staticAccessors$7.SPLIT.get = function () { return 134217729.0 };
-	staticAccessors$7.MAX_PRINT_DIGITS.get = function () { return 32 };
-	staticAccessors$7.TEN.get = function () { return DD.valueOf(10.0) };
-	staticAccessors$7.ONE.get = function () { return DD.valueOf(1.0) };
-	staticAccessors$7.SCI_NOT_EXPONENT_CHAR.get = function () { return 'E' };
-	staticAccessors$7.SCI_NOT_ZERO.get = function () { return '0.0E0' };
-
-	Object.defineProperties( DD, staticAccessors$7 );
-
-	var CGAlgorithmsDD = function CGAlgorithmsDD () {};
-
-	var staticAccessors$6 = { DP_SAFE_EPSILON: { configurable: true } };
-
-	CGAlgorithmsDD.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CGAlgorithmsDD.prototype.getClass = function getClass () {
-	  return CGAlgorithmsDD
-	};
-	CGAlgorithmsDD.orientationIndex = function orientationIndex (p1, p2, q) {
-	  var index = CGAlgorithmsDD.orientationIndexFilter(p1, p2, q);
-	  if (index <= 1) { return index }
-	  var dx1 = DD.valueOf(p2.x).selfAdd(-p1.x);
-	  var dy1 = DD.valueOf(p2.y).selfAdd(-p1.y);
-	  var dx2 = DD.valueOf(q.x).selfAdd(-p2.x);
-	  var dy2 = DD.valueOf(q.y).selfAdd(-p2.y);
-	  return dx1.selfMultiply(dy2).selfSubtract(dy1.selfMultiply(dx2)).signum()
-	};
-	CGAlgorithmsDD.signOfDet2x2 = function signOfDet2x2 (x1, y1, x2, y2) {
-	  var det = x1.multiply(y2).selfSubtract(y1.multiply(x2));
-	  return det.signum()
-	};
-	CGAlgorithmsDD.intersection = function intersection (p1, p2, q1, q2) {
-	  var denom1 = DD.valueOf(q2.y).selfSubtract(q1.y).selfMultiply(DD.valueOf(p2.x).selfSubtract(p1.x));
-	  var denom2 = DD.valueOf(q2.x).selfSubtract(q1.x).selfMultiply(DD.valueOf(p2.y).selfSubtract(p1.y));
-	  var denom = denom1.subtract(denom2);
-	  var numx1 = DD.valueOf(q2.x).selfSubtract(q1.x).selfMultiply(DD.valueOf(p1.y).selfSubtract(q1.y));
-	  var numx2 = DD.valueOf(q2.y).selfSubtract(q1.y).selfMultiply(DD.valueOf(p1.x).selfSubtract(q1.x));
-	  var numx = numx1.subtract(numx2);
-	  var fracP = numx.selfDivide(denom).doubleValue();
-	  var x = DD.valueOf(p1.x).selfAdd(DD.valueOf(p2.x).selfSubtract(p1.x).selfMultiply(fracP)).doubleValue();
-	  var numy1 = DD.valueOf(p2.x).selfSubtract(p1.x).selfMultiply(DD.valueOf(p1.y).selfSubtract(q1.y));
-	  var numy2 = DD.valueOf(p2.y).selfSubtract(p1.y).selfMultiply(DD.valueOf(p1.x).selfSubtract(q1.x));
-	  var numy = numy1.subtract(numy2);
-	  var fracQ = numy.selfDivide(denom).doubleValue();
-	  var y = DD.valueOf(q1.y).selfAdd(DD.valueOf(q2.y).selfSubtract(q1.y).selfMultiply(fracQ)).doubleValue();
-	  return new Coordinate(x, y)
-	};
-	CGAlgorithmsDD.orientationIndexFilter = function orientationIndexFilter (pa, pb, pc) {
-	  var detsum = null;
-	  var detleft = (pa.x - pc.x) * (pb.y - pc.y);
-	  var detright = (pa.y - pc.y) * (pb.x - pc.x);
-	  var det = detleft - detright;
-	  if (detleft > 0.0) {
-	    if (detright <= 0.0) {
-	      return CGAlgorithmsDD.signum(det)
-	    } else {
-	      detsum = detleft + detright;
+
+	  function dragOffset(d3_event) {
+	    if (d3_event.button !== 0) return;
+	    var origin = [d3_event.clientX, d3_event.clientY];
+	    var pointerId = d3_event.pointerId || 'mouse';
+	    context.container().append('div').attr('class', 'nudge-surface');
+	    select(window).on(_pointerPrefix + 'move.drag-bg-offset', pointermove).on(_pointerPrefix + 'up.drag-bg-offset', pointerup);
+
+	    if (_pointerPrefix === 'pointer') {
+	      select(window).on('pointercancel.drag-bg-offset', pointerup);
 	    }
-	  } else if (detleft < 0.0) {
-	    if (detright >= 0.0) {
-	      return CGAlgorithmsDD.signum(det)
-	    } else {
-	      detsum = -detleft - detright;
+
+	    function pointermove(d3_event) {
+	      if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      var latest = [d3_event.clientX, d3_event.clientY];
+	      var d = [-(origin[0] - latest[0]) / 4, -(origin[1] - latest[1]) / 4];
+	      origin = latest;
+	      nudge(d);
+	    }
+
+	    function pointerup(d3_event) {
+	      if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      if (d3_event.button !== 0) return;
+	      context.container().selectAll('.nudge-surface').remove();
+	      select(window).on('.drag-bg-offset', null);
 	    }
-	  } else {
-	    return CGAlgorithmsDD.signum(det)
 	  }
-	  var errbound = CGAlgorithmsDD.DP_SAFE_EPSILON * detsum;
-	  if (det >= errbound || -det >= errbound) {
-	    return CGAlgorithmsDD.signum(det)
+
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.nudge-container').data([0]);
+	    var containerEnter = container.enter().append('div').attr('class', 'nudge-container');
+	    containerEnter.append('div').attr('class', 'nudge-instructions').call(_t.append('background.offset'));
+	    var nudgeWrapEnter = containerEnter.append('div').attr('class', 'nudge-controls-wrap');
+	    var nudgeEnter = nudgeWrapEnter.append('div').attr('class', 'nudge-outer-rect').on(_pointerPrefix + 'down', dragOffset);
+	    nudgeEnter.append('div').attr('class', 'nudge-inner-rect').append('input').attr('type', 'text').attr('aria-label', _t('background.offset_label')).on('change', inputOffset);
+	    nudgeWrapEnter.append('div').selectAll('button').data(_directions).enter().append('button').attr('title', function (d) {
+	      return _t("background.nudge.".concat(d[0]));
+	    }).attr('class', function (d) {
+	      return d[0] + ' nudge';
+	    }).on('click', function (d3_event, d) {
+	      nudge(d[1]);
+	    });
+	    nudgeWrapEnter.append('button').attr('title', _t('background.reset')).attr('class', 'nudge-reset disabled').on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      resetOffset();
+	    }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
+	    updateValue();
 	  }
-	  return 2
-	};
-	CGAlgorithmsDD.signum = function signum (x) {
-	  if (x > 0) { return 1 }
-	  if (x < 0) { return -1 }
-	  return 0
-	};
-	staticAccessors$6.DP_SAFE_EPSILON.get = function () { return 1e-15 };
-
-	Object.defineProperties( CGAlgorithmsDD, staticAccessors$6 );
-
-	var CoordinateSequence = function CoordinateSequence () {};
-
-	var staticAccessors$8 = { X: { configurable: true },Y: { configurable: true },Z: { configurable: true },M: { configurable: true } };
-
-	staticAccessors$8.X.get = function () { return 0 };
-	staticAccessors$8.Y.get = function () { return 1 };
-	staticAccessors$8.Z.get = function () { return 2 };
-	staticAccessors$8.M.get = function () { return 3 };
-	CoordinateSequence.prototype.setOrdinate = function setOrdinate (index, ordinateIndex, value) {};
-	CoordinateSequence.prototype.size = function size () {};
-	CoordinateSequence.prototype.getOrdinate = function getOrdinate (index, ordinateIndex) {};
-	CoordinateSequence.prototype.getCoordinate = function getCoordinate () {};
-	CoordinateSequence.prototype.getCoordinateCopy = function getCoordinateCopy (i) {};
-	CoordinateSequence.prototype.getDimension = function getDimension () {};
-	CoordinateSequence.prototype.getX = function getX (index) {};
-	CoordinateSequence.prototype.clone = function clone () {};
-	CoordinateSequence.prototype.expandEnvelope = function expandEnvelope (env) {};
-	CoordinateSequence.prototype.copy = function copy () {};
-	CoordinateSequence.prototype.getY = function getY (index) {};
-	CoordinateSequence.prototype.toCoordinateArray = function toCoordinateArray () {};
-	CoordinateSequence.prototype.interfaces_ = function interfaces_ () {
-	  return [Clonable]
-	};
-	CoordinateSequence.prototype.getClass = function getClass () {
-	  return CoordinateSequence
-	};
 
-	Object.defineProperties( CoordinateSequence, staticAccessors$8 );
+	  context.background().on('change.backgroundOffset-update', updateValue);
+	  return section;
+	}
 
-	var Exception = function Exception () {};
+	function uiSectionOverlayList(context) {
+	  var section = uiSection('overlay-list', context).label(_t.html('background.overlays')).disclosureContent(renderDisclosureContent);
 
-	var NotRepresentableException = (function (Exception$$1) {
-	  function NotRepresentableException () {
-	    Exception$$1.call(this, 'Projective point not representable on the Cartesian plane.');
-	  }
+	  var _overlayList = select(null);
 
-	  if ( Exception$$1 ) { NotRepresentableException.__proto__ = Exception$$1; }
-	  NotRepresentableException.prototype = Object.create( Exception$$1 && Exception$$1.prototype );
-	  NotRepresentableException.prototype.constructor = NotRepresentableException;
-	  NotRepresentableException.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  NotRepresentableException.prototype.getClass = function getClass () {
-	    return NotRepresentableException
-	  };
+	  function setTooltips(selection) {
+	    selection.each(function (d, i, nodes) {
+	      var item = select(this).select('label');
+	      var span = item.select('span');
+	      var placement = i < nodes.length / 2 ? 'bottom' : 'top';
+	      var description = d.description();
+	      var isOverflowing = span.property('clientWidth') !== span.property('scrollWidth');
+	      item.call(uiTooltip().destroyAny);
 
-	  return NotRepresentableException;
-	}(Exception));
+	      if (description || isOverflowing) {
+	        item.call(uiTooltip().placement(placement).title(description || d.name()));
+	      }
+	    });
+	  }
 
-	var System = function System () {};
+	  function updateLayerSelections(selection) {
+	    function active(d) {
+	      return context.background().showsLayer(d);
+	    }
 
-	System.arraycopy = function arraycopy (src, srcPos, dest, destPos, len) {
-	  var c = 0;
-	  for (var i = srcPos; i < srcPos + len; i++) {
-	    dest[destPos + c] = src[i];
-	    c++;
+	    selection.selectAll('li').classed('active', active).call(setTooltips).selectAll('input').property('checked', active);
 	  }
-	};
 
-	System.getProperty = function getProperty (name) {
-	  return {
-	    'line.separator': '\n'
-	  }[name]
-	};
+	  function chooseOverlay(d3_event, d) {
+	    d3_event.preventDefault();
+	    context.background().toggleOverlayLayer(d);
 
-	var HCoordinate = function HCoordinate () {
-	  this.x = null;
-	  this.y = null;
-	  this.w = null;
-	  if (arguments.length === 0) {
-	    this.x = 0.0;
-	    this.y = 0.0;
-	    this.w = 1.0;
-	  } else if (arguments.length === 1) {
-	    var p = arguments[0];
-	    this.x = p.x;
-	    this.y = p.y;
-	    this.w = 1.0;
-	  } else if (arguments.length === 2) {
-	    if (typeof arguments[0] === 'number' && typeof arguments[1] === 'number') {
-	      var _x = arguments[0];
-	      var _y = arguments[1];
-	      this.x = _x;
-	      this.y = _y;
-	      this.w = 1.0;
-	    } else if (arguments[0] instanceof HCoordinate && arguments[1] instanceof HCoordinate) {
-	      var p1 = arguments[0];
-	      var p2 = arguments[1];
-	      this.x = p1.y * p2.w - p2.y * p1.w;
-	      this.y = p2.x * p1.w - p1.x * p2.w;
-	      this.w = p1.x * p2.y - p2.x * p1.y;
-	    } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Coordinate) {
-	      var p1$1 = arguments[0];
-	      var p2$1 = arguments[1];
-	      this.x = p1$1.y - p2$1.y;
-	      this.y = p2$1.x - p1$1.x;
-	      this.w = p1$1.x * p2$1.y - p2$1.x * p1$1.y;
-	    }
-	  } else if (arguments.length === 3) {
-	    var _x$1 = arguments[0];
-	    var _y$1 = arguments[1];
-	    var _w = arguments[2];
-	    this.x = _x$1;
-	    this.y = _y$1;
-	    this.w = _w;
-	  } else if (arguments.length === 4) {
-	    var p1$2 = arguments[0];
-	    var p2$2 = arguments[1];
-	    var q1 = arguments[2];
-	    var q2 = arguments[3];
-	    var px = p1$2.y - p2$2.y;
-	    var py = p2$2.x - p1$2.x;
-	    var pw = p1$2.x * p2$2.y - p2$2.x * p1$2.y;
-	    var qx = q1.y - q2.y;
-	    var qy = q2.x - q1.x;
-	    var qw = q1.x * q2.y - q2.x * q1.y;
-	    this.x = py * qw - qy * pw;
-	    this.y = qx * pw - px * qw;
-	    this.w = px * qy - qx * py;
-	  }
-	};
-	HCoordinate.prototype.getY = function getY () {
-	  var a = this.y / this.w;
-	  if (Double.isNaN(a) || Double.isInfinite(a)) {
-	    throw new NotRepresentableException()
-	  }
-	  return a
-	};
-	HCoordinate.prototype.getX = function getX () {
-	  var a = this.x / this.w;
-	  if (Double.isNaN(a) || Double.isInfinite(a)) {
-	    throw new NotRepresentableException()
-	  }
-	  return a
-	};
-	HCoordinate.prototype.getCoordinate = function getCoordinate () {
-	  var p = new Coordinate();
-	  p.x = this.getX();
-	  p.y = this.getY();
-	  return p
-	};
-	HCoordinate.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	HCoordinate.prototype.getClass = function getClass () {
-	  return HCoordinate
-	};
-	HCoordinate.intersection = function intersection (p1, p2, q1, q2) {
-	  var px = p1.y - p2.y;
-	  var py = p2.x - p1.x;
-	  var pw = p1.x * p2.y - p2.x * p1.y;
-	  var qx = q1.y - q2.y;
-	  var qy = q2.x - q1.x;
-	  var qw = q1.x * q2.y - q2.x * q1.y;
-	  var x = py * qw - qy * pw;
-	  var y = qx * pw - px * qw;
-	  var w = px * qy - qx * py;
-	  var xInt = x / w;
-	  var yInt = y / w;
-	  if (Double.isNaN(xInt) || (Double.isInfinite(xInt) || Double.isNaN(yInt)) || Double.isInfinite(yInt)) {
-	    throw new NotRepresentableException()
-	  }
-	  return new Coordinate(xInt, yInt)
-	};
+	    _overlayList.call(updateLayerSelections);
 
-	var Envelope = function Envelope () {
-	  this._minx = null;
-	  this._maxx = null;
-	  this._miny = null;
-	  this._maxy = null;
-	  if (arguments.length === 0) {
-	    this.init();
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      this.init(p.x, p.x, p.y, p.y);
-	    } else if (arguments[0] instanceof Envelope) {
-	      var env = arguments[0];
-	      this.init(env);
-	    }
-	  } else if (arguments.length === 2) {
-	    var p1 = arguments[0];
-	    var p2 = arguments[1];
-	    this.init(p1.x, p2.x, p1.y, p2.y);
-	  } else if (arguments.length === 4) {
-	    var x1 = arguments[0];
-	    var x2 = arguments[1];
-	    var y1 = arguments[2];
-	    var y2 = arguments[3];
-	    this.init(x1, x2, y1, y2);
+	    document.activeElement.blur();
 	  }
-	};
 
-	var staticAccessors$9 = { serialVersionUID: { configurable: true } };
-	Envelope.prototype.getArea = function getArea () {
-	  return this.getWidth() * this.getHeight()
-	};
-	Envelope.prototype.equals = function equals (other) {
-	  if (!(other instanceof Envelope)) {
-	    return false
-	  }
-	  var otherEnvelope = other;
-	  if (this.isNull()) {
-	    return otherEnvelope.isNull()
-	  }
-	  return this._maxx === otherEnvelope.getMaxX() && this._maxy === otherEnvelope.getMaxY() && this._minx === otherEnvelope.getMinX() && this._miny === otherEnvelope.getMinY()
-	};
-	Envelope.prototype.intersection = function intersection (env) {
-	  if (this.isNull() || env.isNull() || !this.intersects(env)) { return new Envelope() }
-	  var intMinX = this._minx > env._minx ? this._minx : env._minx;
-	  var intMinY = this._miny > env._miny ? this._miny : env._miny;
-	  var intMaxX = this._maxx < env._maxx ? this._maxx : env._maxx;
-	  var intMaxY = this._maxy < env._maxy ? this._maxy : env._maxy;
-	  return new Envelope(intMinX, intMaxX, intMinY, intMaxY)
-	};
-	Envelope.prototype.isNull = function isNull () {
-	  return this._maxx < this._minx
-	};
-	Envelope.prototype.getMaxX = function getMaxX () {
-	  return this._maxx
-	};
-	Envelope.prototype.covers = function covers () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      return this.covers(p.x, p.y)
-	    } else if (arguments[0] instanceof Envelope) {
-	      var other = arguments[0];
-	      if (this.isNull() || other.isNull()) {
-	        return false
-	      }
-	      return other.getMinX() >= this._minx && other.getMaxX() <= this._maxx && other.getMinY() >= this._miny && other.getMaxY() <= this._maxy
-	    }
-	  } else if (arguments.length === 2) {
-	    var x = arguments[0];
-	    var y = arguments[1];
-	    if (this.isNull()) { return false }
-	    return x >= this._minx && x <= this._maxx && y >= this._miny && y <= this._maxy
+	  function drawListItems(layerList, type, change, filter) {
+	    var sources = context.background().sources(context.map().extent(), context.map().zoom(), true).filter(filter);
+	    var layerLinks = layerList.selectAll('li').data(sources, function (d) {
+	      return d.name();
+	    });
+	    layerLinks.exit().remove();
+	    var enter = layerLinks.enter().append('li');
+	    var label = enter.append('label');
+	    label.append('input').attr('type', type).attr('name', 'layers').on('change', change);
+	    label.append('span').html(function (d) {
+	      return d.label();
+	    });
+	    layerList.selectAll('li').sort(sortSources);
+	    layerList.call(updateLayerSelections);
+
+	    function sortSources(a, b) {
+	      return a.best() && !b.best() ? -1 : b.best() && !a.best() ? 1 : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
+	    }
 	  }
-	};
-	Envelope.prototype.intersects = function intersects () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Envelope) {
-	      var other = arguments[0];
-	      if (this.isNull() || other.isNull()) {
-	        return false
-	      }
-	      return !(other._minx > this._maxx || other._maxx < this._minx || other._miny > this._maxy || other._maxy < this._miny)
-	    } else if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      return this.intersects(p.x, p.y)
-	    }
-	  } else if (arguments.length === 2) {
-	    var x = arguments[0];
-	    var y = arguments[1];
-	    if (this.isNull()) { return false }
-	    return !(x > this._maxx || x < this._minx || y > this._maxy || y < this._miny)
+
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.layer-overlay-list').data([0]);
+	    _overlayList = container.enter().append('ul').attr('class', 'layer-list layer-overlay-list').attr('dir', 'auto').merge(container);
+
+	    _overlayList.call(drawListItems, 'checkbox', chooseOverlay, function (d) {
+	      return !d.isHidden() && d.overlay;
+	    });
 	  }
-	};
-	Envelope.prototype.getMinY = function getMinY () {
-	  return this._miny
-	};
-	Envelope.prototype.getMinX = function getMinX () {
-	  return this._minx
-	};
-	Envelope.prototype.expandToInclude = function expandToInclude () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      this.expandToInclude(p.x, p.y);
-	    } else if (arguments[0] instanceof Envelope) {
-	      var other = arguments[0];
-	      if (other.isNull()) {
-	        return null
-	      }
-	      if (this.isNull()) {
-	        this._minx = other.getMinX();
-	        this._maxx = other.getMaxX();
-	        this._miny = other.getMinY();
-	        this._maxy = other.getMaxY();
+
+	  context.map().on('move.overlay_list', debounce(function () {
+	    // layers in-view may have changed due to map move
+	    window.requestIdleCallback(section.reRender);
+	  }, 1000));
+	  return section;
+	}
+
+	function uiPaneBackground(context) {
+	  var backgroundPane = uiPane('background', context).key(_t('background.key')).label(_t.html('background.title')).description(_t.html('background.description')).iconName('iD-icon-layers').sections([uiSectionBackgroundList(context), uiSectionOverlayList(context), uiSectionBackgroundDisplayOptions(context), uiSectionBackgroundOffset(context)]);
+	  return backgroundPane;
+	}
+
+	function uiPaneHelp(context) {
+	  var docKeys = [['help', ['welcome', 'open_data_h', 'open_data', 'before_start_h', 'before_start', 'open_source_h', 'open_source', 'open_source_help']], ['overview', ['navigation_h', 'navigation_drag', 'navigation_zoom', 'features_h', 'features', 'nodes_ways']], ['editing', ['select_h', 'select_left_click', 'select_right_click', 'select_space', 'multiselect_h', 'multiselect', 'multiselect_shift_click', 'multiselect_lasso', 'undo_redo_h', 'undo_redo', 'save_h', 'save', 'save_validation', 'upload_h', 'upload', 'backups_h', 'backups', 'keyboard_h', 'keyboard']], ['feature_editor', ['intro', 'definitions', 'type_h', 'type', 'type_picker', 'fields_h', 'fields_all_fields', 'fields_example', 'fields_add_field', 'tags_h', 'tags_all_tags', 'tags_resources']], ['points', ['intro', 'add_point_h', 'add_point', 'add_point_finish', 'move_point_h', 'move_point', 'delete_point_h', 'delete_point', 'delete_point_command']], ['lines', ['intro', 'add_line_h', 'add_line', 'add_line_draw', 'add_line_continue', 'add_line_finish', 'modify_line_h', 'modify_line_dragnode', 'modify_line_addnode', 'connect_line_h', 'connect_line', 'connect_line_display', 'connect_line_drag', 'connect_line_tag', 'disconnect_line_h', 'disconnect_line_command', 'move_line_h', 'move_line_command', 'move_line_connected', 'delete_line_h', 'delete_line', 'delete_line_command']], ['areas', ['intro', 'point_or_area_h', 'point_or_area', 'add_area_h', 'add_area_command', 'add_area_draw', 'add_area_continue', 'add_area_finish', 'square_area_h', 'square_area_command', 'modify_area_h', 'modify_area_dragnode', 'modify_area_addnode', 'delete_area_h', 'delete_area', 'delete_area_command']], ['relations', ['intro', 'edit_relation_h', 'edit_relation', 'edit_relation_add', 'edit_relation_delete', 'maintain_relation_h', 'maintain_relation', 'relation_types_h', 'multipolygon_h', 'multipolygon', 'multipolygon_create', 'multipolygon_merge', 'turn_restriction_h', 'turn_restriction', 'turn_restriction_field', 'turn_restriction_editing', 'route_h', 'route', 'route_add', 'boundary_h', 'boundary', 'boundary_add']], ['operations', ['intro', 'intro_2', 'straighten', 'orthogonalize', 'circularize', 'move', 'rotate', 'reflect', 'continue', 'reverse', 'disconnect', 'split', 'extract', 'merge', 'delete', 'downgrade', 'copy_paste']], ['notes', ['intro', 'add_note_h', 'add_note', 'place_note', 'move_note', 'update_note_h', 'update_note', 'save_note_h', 'save_note']], ['imagery', ['intro', 'sources_h', 'choosing', 'sources', 'offsets_h', 'offset', 'offset_change']], ['streetlevel', ['intro', 'using_h', 'using', 'photos', 'viewer']], ['gps', ['intro', 'survey', 'using_h', 'using', 'tracing', 'upload']], ['qa', ['intro', 'tools_h', 'tools', 'issues_h', 'issues']]];
+	  var headings = {
+	    'help.help.open_data_h': 3,
+	    'help.help.before_start_h': 3,
+	    'help.help.open_source_h': 3,
+	    'help.overview.navigation_h': 3,
+	    'help.overview.features_h': 3,
+	    'help.editing.select_h': 3,
+	    'help.editing.multiselect_h': 3,
+	    'help.editing.undo_redo_h': 3,
+	    'help.editing.save_h': 3,
+	    'help.editing.upload_h': 3,
+	    'help.editing.backups_h': 3,
+	    'help.editing.keyboard_h': 3,
+	    'help.feature_editor.type_h': 3,
+	    'help.feature_editor.fields_h': 3,
+	    'help.feature_editor.tags_h': 3,
+	    'help.points.add_point_h': 3,
+	    'help.points.move_point_h': 3,
+	    'help.points.delete_point_h': 3,
+	    'help.lines.add_line_h': 3,
+	    'help.lines.modify_line_h': 3,
+	    'help.lines.connect_line_h': 3,
+	    'help.lines.disconnect_line_h': 3,
+	    'help.lines.move_line_h': 3,
+	    'help.lines.delete_line_h': 3,
+	    'help.areas.point_or_area_h': 3,
+	    'help.areas.add_area_h': 3,
+	    'help.areas.square_area_h': 3,
+	    'help.areas.modify_area_h': 3,
+	    'help.areas.delete_area_h': 3,
+	    'help.relations.edit_relation_h': 3,
+	    'help.relations.maintain_relation_h': 3,
+	    'help.relations.relation_types_h': 2,
+	    'help.relations.multipolygon_h': 3,
+	    'help.relations.turn_restriction_h': 3,
+	    'help.relations.route_h': 3,
+	    'help.relations.boundary_h': 3,
+	    'help.notes.add_note_h': 3,
+	    'help.notes.update_note_h': 3,
+	    'help.notes.save_note_h': 3,
+	    'help.imagery.sources_h': 3,
+	    'help.imagery.offsets_h': 3,
+	    'help.streetlevel.using_h': 3,
+	    'help.gps.using_h': 3,
+	    'help.qa.tools_h': 3,
+	    'help.qa.issues_h': 3
+	  }; // For each section, squash all the texts into a single markdown document
+
+	  var docs = docKeys.map(function (key) {
+	    var helpkey = 'help.' + key[0];
+	    var helpPaneReplacements = {
+	      version: context.version
+	    };
+	    var text = key[1].reduce(function (all, part) {
+	      var subkey = helpkey + '.' + part;
+	      var depth = headings[subkey]; // is this subkey a heading?
+
+	      var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
+
+	      return all + hhh + helpHtml(subkey, helpPaneReplacements) + '\n\n';
+	    }, '');
+	    return {
+	      title: _t.html(helpkey + '.title'),
+	      content: marked_1(text.trim()) // use keyboard key styling for shortcuts
+	      .replace(/<code>/g, '<kbd>').replace(/<\/code>/g, '<\/kbd>')
+	    };
+	  });
+	  var helpPane = uiPane('help', context).key(_t('help.key')).label(_t.html('help.title')).description(_t.html('help.title')).iconName('iD-icon-help');
+
+	  helpPane.renderContent = function (content) {
+	    function clickHelp(d, i) {
+	      var rtl = _mainLocalizer.textDirection() === 'rtl';
+	      content.property('scrollTop', 0);
+	      helpPane.selection().select('.pane-heading h2').html(d.title);
+	      body.html(d.content);
+	      body.selectAll('a').attr('target', '_blank');
+	      menuItems.classed('selected', function (m) {
+	        return m.title === d.title;
+	      });
+	      nav.html('');
+
+	      if (rtl) {
+	        nav.call(drawNext).call(drawPrevious);
 	      } else {
-	        if (other._minx < this._minx) {
-	          this._minx = other._minx;
-	        }
-	        if (other._maxx > this._maxx) {
-	          this._maxx = other._maxx;
-	        }
-	        if (other._miny < this._miny) {
-	          this._miny = other._miny;
+	        nav.call(drawPrevious).call(drawNext);
+	      }
+
+	      function drawNext(selection) {
+	        if (i < docs.length - 1) {
+	          var nextLink = selection.append('a').attr('href', '#').attr('class', 'next').on('click', function (d3_event) {
+	            d3_event.preventDefault();
+	            clickHelp(docs[i + 1], i + 1);
+	          });
+	          nextLink.append('span').html(docs[i + 1].title).call(svgIcon(rtl ? '#iD-icon-backward' : '#iD-icon-forward', 'inline'));
 	        }
-	        if (other._maxy > this._maxy) {
-	          this._maxy = other._maxy;
+	      }
+
+	      function drawPrevious(selection) {
+	        if (i > 0) {
+	          var prevLink = selection.append('a').attr('href', '#').attr('class', 'previous').on('click', function (d3_event) {
+	            d3_event.preventDefault();
+	            clickHelp(docs[i - 1], i - 1);
+	          });
+	          prevLink.call(svgIcon(rtl ? '#iD-icon-forward' : '#iD-icon-backward', 'inline')).append('span').html(docs[i - 1].title);
 	        }
 	      }
 	    }
-	  } else if (arguments.length === 2) {
-	    var x = arguments[0];
-	    var y = arguments[1];
-	    if (this.isNull()) {
-	      this._minx = x;
-	      this._maxx = x;
-	      this._miny = y;
-	      this._maxy = y;
-	    } else {
-	      if (x < this._minx) {
-	        this._minx = x;
-	      }
-	      if (x > this._maxx) {
-	        this._maxx = x;
-	      }
-	      if (y < this._miny) {
-	        this._miny = y;
-	      }
-	      if (y > this._maxy) {
-	        this._maxy = y;
-	      }
+
+	    function clickWalkthrough(d3_event) {
+	      d3_event.preventDefault();
+	      if (context.inIntro()) return;
+	      context.container().call(uiIntro(context));
+	      context.ui().togglePanes();
 	    }
+
+	    function clickShortcuts(d3_event) {
+	      d3_event.preventDefault();
+	      context.container().call(context.ui().shortcuts, true);
+	    }
+
+	    var toc = content.append('ul').attr('class', 'toc');
+	    var menuItems = toc.selectAll('li').data(docs).enter().append('li').append('a').attr('role', 'button').attr('href', '#').html(function (d) {
+	      return d.title;
+	    }).on('click', function (d3_event, d) {
+	      d3_event.preventDefault();
+	      clickHelp(d, docs.indexOf(d));
+	    });
+	    var shortcuts = toc.append('li').attr('class', 'shortcuts').call(uiTooltip().title(_t.html('shortcuts.tooltip')).keys(['?']).placement('top')).append('a').attr('href', '#').on('click', clickShortcuts);
+	    shortcuts.append('div').call(_t.append('shortcuts.title'));
+	    var walkthrough = toc.append('li').attr('class', 'walkthrough').append('a').attr('href', '#').on('click', clickWalkthrough);
+	    walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+	    walkthrough.append('div').call(_t.append('splash.walkthrough'));
+	    var helpContent = content.append('div').attr('class', 'left-content');
+	    var body = helpContent.append('div').attr('class', 'body');
+	    var nav = helpContent.append('div').attr('class', 'nav');
+	    clickHelp(docs[0], 0);
+	  };
+
+	  return helpPane;
+	}
+
+	function uiSectionValidationIssues(id, severity, context) {
+	  var _issues = [];
+	  var section = uiSection(id, context).label(function () {
+	    if (!_issues) return '';
+	    var issueCountText = _issues.length > 1000 ? '1000+' : String(_issues.length);
+	    return _t.html('inspector.title_count', {
+	      title: {
+	        html: _t.html('issues.' + severity + 's.list_title')
+	      },
+	      count: issueCountText
+	    });
+	  }).disclosureContent(renderDisclosureContent).shouldDisplay(function () {
+	    return _issues && _issues.length;
+	  });
+
+	  function getOptions() {
+	    return {
+	      what: corePreferences('validate-what') || 'edited',
+	      where: corePreferences('validate-where') || 'all'
+	    };
+	  } // get and cache the issues to display, unordered
+
+
+	  function reloadIssues() {
+	    _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
 	  }
-	};
-	Envelope.prototype.minExtent = function minExtent () {
-	  if (this.isNull()) { return 0.0 }
-	  var w = this.getWidth();
-	  var h = this.getHeight();
-	  if (w < h) { return w }
-	  return h
-	};
-	Envelope.prototype.getWidth = function getWidth () {
-	  if (this.isNull()) {
-	    return 0
-	  }
-	  return this._maxx - this._minx
-	};
-	Envelope.prototype.compareTo = function compareTo (o) {
-	  var env = o;
-	  if (this.isNull()) {
-	    if (env.isNull()) { return 0 }
-	    return -1
-	  } else {
-	    if (env.isNull()) { return 1 }
-	  }
-	  if (this._minx < env._minx) { return -1 }
-	  if (this._minx > env._minx) { return 1 }
-	  if (this._miny < env._miny) { return -1 }
-	  if (this._miny > env._miny) { return 1 }
-	  if (this._maxx < env._maxx) { return -1 }
-	  if (this._maxx > env._maxx) { return 1 }
-	  if (this._maxy < env._maxy) { return -1 }
-	  if (this._maxy > env._maxy) { return 1 }
-	  return 0
-	};
-	Envelope.prototype.translate = function translate (transX, transY) {
-	  if (this.isNull()) {
-	    return null
-	  }
-	  this.init(this.getMinX() + transX, this.getMaxX() + transX, this.getMinY() + transY, this.getMaxY() + transY);
-	};
-	Envelope.prototype.toString = function toString () {
-	  return 'Env[' + this._minx + ' : ' + this._maxx + ', ' + this._miny + ' : ' + this._maxy + ']'
-	};
-	Envelope.prototype.setToNull = function setToNull () {
-	  this._minx = 0;
-	  this._maxx = -1;
-	  this._miny = 0;
-	  this._maxy = -1;
-	};
-	Envelope.prototype.getHeight = function getHeight () {
-	  if (this.isNull()) {
-	    return 0
-	  }
-	  return this._maxy - this._miny
-	};
-	Envelope.prototype.maxExtent = function maxExtent () {
-	  if (this.isNull()) { return 0.0 }
-	  var w = this.getWidth();
-	  var h = this.getHeight();
-	  if (w > h) { return w }
-	  return h
-	};
-	Envelope.prototype.expandBy = function expandBy () {
-	  if (arguments.length === 1) {
-	    var distance = arguments[0];
-	    this.expandBy(distance, distance);
-	  } else if (arguments.length === 2) {
-	    var deltaX = arguments[0];
-	    var deltaY = arguments[1];
-	    if (this.isNull()) { return null }
-	    this._minx -= deltaX;
-	    this._maxx += deltaX;
-	    this._miny -= deltaY;
-	    this._maxy += deltaY;
-	    if (this._minx > this._maxx || this._miny > this._maxy) { this.setToNull(); }
-	  }
-	};
-	Envelope.prototype.contains = function contains () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Envelope) {
-	      var other = arguments[0];
-	      return this.covers(other)
-	    } else if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      return this.covers(p)
-	    }
-	  } else if (arguments.length === 2) {
-	    var x = arguments[0];
-	    var y = arguments[1];
-	    return this.covers(x, y)
+
+	  function renderDisclosureContent(selection) {
+	    var center = context.map().center();
+	    var graph = context.graph(); // sort issues by distance away from the center of the map
+
+	    var issues = _issues.map(function withDistance(issue) {
+	      var extent = issue.extent(graph);
+	      var dist = extent ? geoSphericalDistance(center, extent.center()) : 0;
+	      return Object.assign(issue, {
+	        dist: dist
+	      });
+	    }).sort(function byDistance(a, b) {
+	      return a.dist - b.dist;
+	    }); // cut off at 1000
+
+
+	    issues = issues.slice(0, 1000); //renderIgnoredIssuesReset(_warningsSelection);
+
+	    selection.call(drawIssuesList, issues);
 	  }
-	};
-	Envelope.prototype.centre = function centre () {
-	  if (this.isNull()) { return null }
-	  return new Coordinate((this.getMinX() + this.getMaxX()) / 2.0, (this.getMinY() + this.getMaxY()) / 2.0)
-	};
-	Envelope.prototype.init = function init () {
-	  if (arguments.length === 0) {
-	    this.setToNull();
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      this.init(p.x, p.x, p.y, p.y);
-	    } else if (arguments[0] instanceof Envelope) {
-	      var env = arguments[0];
-	      this._minx = env._minx;
-	      this._maxx = env._maxx;
-	      this._miny = env._miny;
-	      this._maxy = env._maxy;
-	    }
-	  } else if (arguments.length === 2) {
-	    var p1 = arguments[0];
-	    var p2 = arguments[1];
-	    this.init(p1.x, p2.x, p1.y, p2.y);
-	  } else if (arguments.length === 4) {
-	    var x1 = arguments[0];
-	    var x2 = arguments[1];
-	    var y1 = arguments[2];
-	    var y2 = arguments[3];
-	    if (x1 < x2) {
-	      this._minx = x1;
-	      this._maxx = x2;
-	    } else {
-	      this._minx = x2;
-	      this._maxx = x1;
-	    }
-	    if (y1 < y2) {
-	      this._miny = y1;
-	      this._maxy = y2;
-	    } else {
-	      this._miny = y2;
-	      this._maxy = y1;
+
+	  function drawIssuesList(selection, issues) {
+	    var list = selection.selectAll('.issues-list').data([0]);
+	    list = list.enter().append('ul').attr('class', 'layer-list issues-list ' + severity + 's-list').merge(list);
+	    var items = list.selectAll('li').data(issues, function (d) {
+	      return d.key;
+	    }); // Exit
+
+	    items.exit().remove(); // Enter
+
+	    var itemsEnter = items.enter().append('li').attr('class', function (d) {
+	      return 'issue severity-' + d.severity;
+	    });
+	    var labelsEnter = itemsEnter.append('button').attr('class', 'issue-label').on('click', function (d3_event, d) {
+	      context.validator().focusIssue(d);
+	    }).on('mouseover', function (d3_event, d) {
+	      utilHighlightEntities(d.entityIds, true, context);
+	    }).on('mouseout', function (d3_event, d) {
+	      utilHighlightEntities(d.entityIds, false, context);
+	    });
+	    var textEnter = labelsEnter.append('span').attr('class', 'issue-text');
+	    textEnter.append('span').attr('class', 'issue-icon').each(function (d) {
+	      var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
+	      select(this).call(svgIcon(iconName));
+	    });
+	    textEnter.append('span').attr('class', 'issue-message');
+	    /*
+	    labelsEnter
+	        .append('span')
+	        .attr('class', 'issue-autofix')
+	        .each(function(d) {
+	            if (!d.autoFix) return;
+	             d3_select(this)
+	                .append('button')
+	                .attr('title', t('issues.fix_one.title'))
+	                .datum(d.autoFix)  // set button datum to the autofix
+	                .attr('class', 'autofix action')
+	                .on('click', function(d3_event, d) {
+	                    d3_event.preventDefault();
+	                    d3_event.stopPropagation();
+	                     var issuesEntityIDs = d.issue.entityIds;
+	                    utilHighlightEntities(issuesEntityIDs.concat(d.entityIds), false, context);
+	                     context.perform.apply(context, d.autoArgs);
+	                    context.validator().validate();
+	                })
+	                .call(svgIcon('#iD-icon-wrench'));
+	        });
+	    */
+	    // Update
+
+	    items = items.merge(itemsEnter).order();
+	    items.selectAll('.issue-message').html(function (d) {
+	      return d.message(context);
+	    });
+	    /*
+	    // autofix
+	    var canAutoFix = issues.filter(function(issue) { return issue.autoFix; });
+	     var autoFixAll = selection.selectAll('.autofix-all')
+	        .data(canAutoFix.length ? [0] : []);
+	     // exit
+	    autoFixAll.exit()
+	        .remove();
+	     // enter
+	    var autoFixAllEnter = autoFixAll.enter()
+	        .insert('div', '.issues-list')
+	        .attr('class', 'autofix-all');
+	     var linkEnter = autoFixAllEnter
+	        .append('a')
+	        .attr('class', 'autofix-all-link')
+	        .attr('href', '#');
+	     linkEnter
+	        .append('span')
+	        .attr('class', 'autofix-all-link-text')
+	        .call(t.append('issues.fix_all.title'));
+	     linkEnter
+	        .append('span')
+	        .attr('class', 'autofix-all-link-icon')
+	        .call(svgIcon('#iD-icon-wrench'));
+	     if (severity === 'warning') {
+	        renderIgnoredIssuesReset(selection);
 	    }
+	     // update
+	    autoFixAll = autoFixAll
+	        .merge(autoFixAllEnter);
+	     autoFixAll.selectAll('.autofix-all-link')
+	        .on('click', function() {
+	            context.pauseChangeDispatch();
+	            context.perform(actionNoop());
+	            canAutoFix.forEach(function(issue) {
+	                var args = issue.autoFix.autoArgs.slice();  // copy
+	                if (typeof args[args.length - 1] !== 'function') {
+	                    args.pop();
+	                }
+	                args.push(t('issues.fix_all.annotation'));
+	                context.replace.apply(context, args);
+	            });
+	            context.resumeChangeDispatch();
+	            context.validator().validate();
+	        });
+	    */
 	  }
-	};
-	Envelope.prototype.getMaxY = function getMaxY () {
-	  return this._maxy
-	};
-	Envelope.prototype.distance = function distance (env) {
-	  if (this.intersects(env)) { return 0 }
-	  var dx = 0.0;
-	  if (this._maxx < env._minx) { dx = env._minx - this._maxx; } else if (this._minx > env._maxx) { dx = this._minx - env._maxx; }
-	  var dy = 0.0;
-	  if (this._maxy < env._miny) { dy = env._miny - this._maxy; } else if (this._miny > env._maxy) { dy = this._miny - env._maxy; }
-	  if (dx === 0.0) { return dy }
-	  if (dy === 0.0) { return dx }
-	  return Math.sqrt(dx * dx + dy * dy)
-	};
-	Envelope.prototype.hashCode = function hashCode () {
-	  var result = 17;
-	  result = 37 * result + Coordinate.hashCode(this._minx);
-	  result = 37 * result + Coordinate.hashCode(this._maxx);
-	  result = 37 * result + Coordinate.hashCode(this._miny);
-	  result = 37 * result + Coordinate.hashCode(this._maxy);
-	  return result
-	};
-	Envelope.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable, Serializable]
-	};
-	Envelope.prototype.getClass = function getClass () {
-	  return Envelope
-	};
-	Envelope.intersects = function intersects () {
-	  if (arguments.length === 3) {
-	    var p1 = arguments[0];
-	    var p2 = arguments[1];
-	    var q = arguments[2];
-	    if (q.x >= (p1.x < p2.x ? p1.x : p2.x) && q.x <= (p1.x > p2.x ? p1.x : p2.x) && (q.y >= (p1.y < p2.y ? p1.y : p2.y) && q.y <= (p1.y > p2.y ? p1.y : p2.y))) {
-	      return true
-	    }
-	    return false
-	  } else if (arguments.length === 4) {
-	    var p1$1 = arguments[0];
-	    var p2$1 = arguments[1];
-	    var q1 = arguments[2];
-	    var q2 = arguments[3];
-	    var minq = Math.min(q1.x, q2.x);
-	    var maxq = Math.max(q1.x, q2.x);
-	    var minp = Math.min(p1$1.x, p2$1.x);
-	    var maxp = Math.max(p1$1.x, p2$1.x);
-	    if (minp > maxq) { return false }
-	    if (maxp < minq) { return false }
-	    minq = Math.min(q1.y, q2.y);
-	    maxq = Math.max(q1.y, q2.y);
-	    minp = Math.min(p1$1.y, p2$1.y);
-	    maxp = Math.max(p1$1.y, p2$1.y);
-	    if (minp > maxq) { return false }
-	    if (maxp < minq) { return false }
-	    return true
-	  }
-	};
-	staticAccessors$9.serialVersionUID.get = function () { return 5873921885273102420 };
 
-	Object.defineProperties( Envelope, staticAccessors$9 );
+	  context.validator().on('validated.uiSectionValidationIssues' + id, function () {
+	    window.requestIdleCallback(function () {
+	      reloadIssues();
+	      section.reRender();
+	    });
+	  });
+	  context.map().on('move.uiSectionValidationIssues' + id, debounce(function () {
+	    window.requestIdleCallback(function () {
+	      if (getOptions().where === 'visible') {
+	        // must refetch issues if they are viewport-dependent
+	        reloadIssues();
+	      } // always reload list to re-sort-by-distance
 
-	var regExes = {
-	  'typeStr': /^\s*(\w+)\s*\(\s*(.*)\s*\)\s*$/,
-	  'emptyTypeStr': /^\s*(\w+)\s*EMPTY\s*$/,
-	  'spaces': /\s+/,
-	  'parenComma': /\)\s*,\s*\(/,
-	  'doubleParenComma': /\)\s*\)\s*,\s*\(\s*\(/, // can't use {2} here
-	  'trimParens': /^\s*\(?(.*?)\)?\s*$/
-	};
 
-	/**
-	 * Class for reading and writing Well-Known Text.
-	 *
-	 * NOTE: Adapted from OpenLayers 2.11 implementation.
-	 */
+	      section.reRender();
+	    });
+	  }, 1000));
+	  return section;
+	}
 
-	/** Create a new parser for WKT
-	 *
-	 * @param {GeometryFactory} geometryFactory
-	 * @return An instance of WKTParser.
-	 * @constructor
-	 * @private
-	 */
-	var WKTParser = function WKTParser (geometryFactory) {
-	  this.geometryFactory = geometryFactory || new GeometryFactory();
-	};
-	/**
-	 * Deserialize a WKT string and return a geometry. Supports WKT for POINT,
-	 * MULTIPOINT, LINESTRING, LINEARRING, MULTILINESTRING, POLYGON, MULTIPOLYGON,
-	 * and GEOMETRYCOLLECTION.
-	 *
-	 * @param {String} wkt A WKT string.
-	 * @return {Geometry} A geometry instance.
-	 * @private
-	 */
-	WKTParser.prototype.read = function read (wkt) {
-	  var geometry, type, str;
-	  wkt = wkt.replace(/[\n\r]/g, ' ');
-	  var matches = regExes.typeStr.exec(wkt);
-	  if (wkt.search('EMPTY') !== -1) {
-	    matches = regExes.emptyTypeStr.exec(wkt);
-	    matches[2] = undefined;
+	function uiSectionValidationOptions(context) {
+	  var section = uiSection('issues-options', context).content(renderContent);
+
+	  function renderContent(selection) {
+	    var container = selection.selectAll('.issues-options-container').data([0]);
+	    container = container.enter().append('div').attr('class', 'issues-options-container').merge(container);
+	    var data = [{
+	      key: 'what',
+	      values: ['edited', 'all']
+	    }, {
+	      key: 'where',
+	      values: ['visible', 'all']
+	    }];
+	    var options = container.selectAll('.issues-option').data(data, function (d) {
+	      return d.key;
+	    });
+	    var optionsEnter = options.enter().append('div').attr('class', function (d) {
+	      return 'issues-option issues-option-' + d.key;
+	    });
+	    optionsEnter.append('div').attr('class', 'issues-option-title').html(function (d) {
+	      return _t.html('issues.options.' + d.key + '.title');
+	    });
+	    var valuesEnter = optionsEnter.selectAll('label').data(function (d) {
+	      return d.values.map(function (val) {
+	        return {
+	          value: val,
+	          key: d.key
+	        };
+	      });
+	    }).enter().append('label');
+	    valuesEnter.append('input').attr('type', 'radio').attr('name', function (d) {
+	      return 'issues-option-' + d.key;
+	    }).attr('value', function (d) {
+	      return d.value;
+	    }).property('checked', function (d) {
+	      return getOptions()[d.key] === d.value;
+	    }).on('change', function (d3_event, d) {
+	      updateOptionValue(d3_event, d.key, d.value);
+	    });
+	    valuesEnter.append('span').html(function (d) {
+	      return _t.html('issues.options.' + d.key + '.' + d.value);
+	    });
+	  }
+
+	  function getOptions() {
+	    return {
+	      what: corePreferences('validate-what') || 'edited',
+	      // 'all', 'edited'
+	      where: corePreferences('validate-where') || 'all' // 'all', 'visible'
+
+	    };
 	  }
-	  if (matches) {
-	    type = matches[1].toLowerCase();
-	    str = matches[2];
-	    if (parse$1[type]) {
-	      geometry = parse$1[type].apply(this, [str]);
+
+	  function updateOptionValue(d3_event, d, val) {
+	    if (!val && d3_event && d3_event.target) {
+	      val = d3_event.target.value;
 	    }
+
+	    corePreferences('validate-' + d, val);
+	    context.validator().validate();
 	  }
 
-	  if (geometry === undefined) { throw new Error('Could not parse WKT ' + wkt) }
+	  return section;
+	}
 
-	  return geometry
-	};
+	function uiSectionValidationRules(context) {
+	  var MINSQUARE = 0;
+	  var MAXSQUARE = 20;
+	  var DEFAULTSQUARE = 5; // see also unsquare_way.js
 
-	/**
-	 * Serialize a geometry into a WKT string.
-	 *
-	 * @param {Geometry} geometry A feature or array of features.
-	 * @return {String} The WKT string representation of the input geometries.
-	 * @private
-	 */
-	WKTParser.prototype.write = function write (geometry) {
-	  return this.extractGeometry(geometry)
-	};
+	  var section = uiSection('issues-rules', context).disclosureContent(renderDisclosureContent).label(_t.html('issues.rules.title'));
+
+	  var _ruleKeys = context.validator().getRuleKeys().filter(function (key) {
+	    return key !== 'maprules';
+	  }).sort(function (key1, key2) {
+	    // alphabetize by localized title
+	    return _t('issues.' + key1 + '.title') < _t('issues.' + key2 + '.title') ? -1 : 1;
+	  });
+
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.issues-rulelist-container').data([0]);
+	    var containerEnter = container.enter().append('div').attr('class', 'issues-rulelist-container');
+	    containerEnter.append('ul').attr('class', 'layer-list issue-rules-list');
+	    var ruleLinks = containerEnter.append('div').attr('class', 'issue-rules-links section-footer');
+	    ruleLinks.append('a').attr('class', 'issue-rules-link').attr('role', 'button').attr('href', '#').call(_t.append('issues.disable_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.validator().disableRules(_ruleKeys);
+	    });
+	    ruleLinks.append('a').attr('class', 'issue-rules-link').attr('role', 'button').attr('href', '#').call(_t.append('issues.enable_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.validator().disableRules([]);
+	    }); // Update
 
-	/**
-	 * Entry point to construct the WKT for a single Geometry object.
-	 *
-	 * @param {Geometry} geometry
-	 * @return {String} A WKT string of representing the geometry.
-	 * @private
-	 */
-	WKTParser.prototype.extractGeometry = function extractGeometry (geometry) {
-	  var type = geometry.getGeometryType().toLowerCase();
-	  if (!extract$1[type]) {
-	    return null
-	  }
-	  var wktType = type.toUpperCase();
-	  var data;
-	  if (geometry.isEmpty()) {
-	    data = wktType + ' EMPTY';
-	  } else {
-	    data = wktType + '(' + extract$1[type].apply(this, [geometry]) + ')';
+	    container = container.merge(containerEnter);
+	    container.selectAll('.issue-rules-list').call(drawListItems, _ruleKeys, 'checkbox', 'rule', toggleRule, isRuleEnabled);
 	  }
-	  return data
-	};
 
-	/**
-	 * Object with properties corresponding to the geometry types. Property values
-	 * are functions that do the actual data extraction.
-	 * @private
-	 */
-	var extract$1 = {
-	  coordinate: function coordinate (coordinate$1) {
-	    return coordinate$1.x + ' ' + coordinate$1.y
-	  },
+	  function drawListItems(selection, data, type, name, change, active) {
+	    var items = selection.selectAll('li').data(data); // Exit
 
-	  /**
-	   * Return a space delimited string of point coordinates.
-	   *
-	   * @param {Point}
-	   *          point
-	   * @return {String} A string of coordinates representing the point.
-	   */
-	  point: function point (point$1) {
-	    return extract$1.coordinate.call(this, point$1._coordinates._coordinates[0])
-	  },
+	    items.exit().remove(); // Enter
 
-	  /**
-	   * Return a comma delimited string of point coordinates from a multipoint.
-	   *
-	   * @param {MultiPoint}
-	   *          multipoint
-	   * @return {String} A string of point coordinate strings representing the
-	   *         multipoint.
-	   */
-	  multipoint: function multipoint (multipoint$1) {
-	    var this$1 = this;
+	    var enter = items.enter().append('li');
 
-	    var array = [];
-	    for (var i = 0, len = multipoint$1._geometries.length; i < len; ++i) {
-	      array.push('(' + extract$1.point.apply(this$1, [multipoint$1._geometries[i]]) + ')');
+	    if (name === 'rule') {
+	      enter.call(uiTooltip().title(function (d) {
+	        return _t.html('issues.' + d + '.tip');
+	      }).placement('top'));
 	    }
-	    return array.join(',')
-	  },
 
-	  /**
-	   * Return a comma delimited string of point coordinates from a line.
-	   *
-	   * @param {LineString} linestring
-	   * @return {String} A string of point coordinate strings representing the linestring.
-	   */
-	  linestring: function linestring (linestring$1) {
-	    var this$1 = this;
+	    var label = enter.append('label');
+	    label.append('input').attr('type', type).attr('name', name).on('change', change);
+	    label.append('span').html(function (d) {
+	      var params = {};
 
-	    var array = [];
-	    for (var i = 0, len = linestring$1._points._coordinates.length; i < len; ++i) {
-	      array.push(extract$1.coordinate.apply(this$1, [linestring$1._points._coordinates[i]]));
-	    }
-	    return array.join(',')
-	  },
+	      if (d === 'unsquare_way') {
+	        params.val = {
+	          html: '<span class="square-degrees"></span>'
+	        };
+	      }
 
-	  linearring: function linearring (linearring$1) {
-	    var this$1 = this;
+	      return _t.html('issues.' + d + '.title', params);
+	    }); // Update
 
-	    var array = [];
-	    for (var i = 0, len = linearring$1._points._coordinates.length; i < len; ++i) {
-	      array.push(extract$1.coordinate.apply(this$1, [linearring$1._points._coordinates[i]]));
-	    }
-	    return array.join(',')
-	  },
+	    items = items.merge(enter);
+	    items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false); // user-configurable square threshold
 
-	  /**
-	   * Return a comma delimited string of linestring strings from a
-	   * multilinestring.
-	   *
-	   * @param {MultiLineString} multilinestring
-	   * @return {String} A string of of linestring strings representing the multilinestring.
-	   */
-	  multilinestring: function multilinestring (multilinestring$1) {
-	    var this$1 = this;
+	    var degStr = corePreferences('validate-square-degrees');
 
-	    var array = [];
-	    for (var i = 0, len = multilinestring$1._geometries.length; i < len; ++i) {
-	      array.push('(' +
-	        extract$1.linestring.apply(this$1, [multilinestring$1._geometries[i]]) +
-	        ')');
+	    if (degStr === null) {
+	      degStr = DEFAULTSQUARE.toString();
 	    }
-	    return array.join(',')
-	  },
 
-	  /**
-	   * Return a comma delimited string of linear ring arrays from a polygon.
-	   *
-	   * @param {Polygon} polygon
-	   * @return {String} An array of linear ring arrays representing the polygon.
-	   */
-	  polygon: function polygon (polygon$1) {
-	    var this$1 = this;
+	    var span = items.selectAll('.square-degrees');
+	    var input = span.selectAll('.square-degrees-input').data([0]); // enter / update
 
-	    var array = [];
-	    array.push('(' + extract$1.linestring.apply(this, [polygon$1._shell]) + ')');
-	    for (var i = 0, len = polygon$1._holes.length; i < len; ++i) {
-	      array.push('(' + extract$1.linestring.apply(this$1, [polygon$1._holes[i]]) + ')');
-	    }
-	    return array.join(',')
-	  },
+	    input.enter().append('input').attr('type', 'number').attr('min', MINSQUARE.toString()).attr('max', MAXSQUARE.toString()).attr('step', '0.5').attr('class', 'square-degrees-input').call(utilNoAuto).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      this.select();
+	    }).on('keyup', function (d3_event) {
+	      if (d3_event.keyCode === 13) {
+	        // ↩ Return
+	        this.blur();
+	        this.select();
+	      }
+	    }).on('blur', changeSquare).merge(input).property('value', degStr);
+	  }
 
-	  /**
-	   * Return an array of polygon arrays from a multipolygon.
-	   *
-	   * @param {MultiPolygon} multipolygon
-	   * @return {String} An array of polygon arrays representing the multipolygon.
-	   */
-	  multipolygon: function multipolygon (multipolygon$1) {
-	    var this$1 = this;
+	  function changeSquare() {
+	    var input = select(this);
+	    var degStr = utilGetSetValue(input).trim();
+	    var degNum = parseFloat(degStr, 10);
 
-	    var array = [];
-	    for (var i = 0, len = multipolygon$1._geometries.length; i < len; ++i) {
-	      array.push('(' + extract$1.polygon.apply(this$1, [multipolygon$1._geometries[i]]) + ')');
+	    if (!isFinite(degNum)) {
+	      degNum = DEFAULTSQUARE;
+	    } else if (degNum > MAXSQUARE) {
+	      degNum = MAXSQUARE;
+	    } else if (degNum < MINSQUARE) {
+	      degNum = MINSQUARE;
 	    }
-	    return array.join(',')
-	  },
 
-	  /**
-	   * Return the WKT portion between 'GEOMETRYCOLLECTION(' and ')' for an
-	   * geometrycollection.
-	   *
-	   * @param {GeometryCollection} collection
-	   * @return {String} internal WKT representation of the collection.
-	   */
-	  geometrycollection: function geometrycollection (collection) {
-	    var this$1 = this;
+	    degNum = Math.round(degNum * 10) / 10; // round to 1 decimal
 
-	    var array = [];
-	    for (var i = 0, len = collection._geometries.length; i < len; ++i) {
-	      array.push(this$1.extractGeometry(collection._geometries[i]));
-	    }
-	    return array.join(',')
+	    degStr = degNum.toString();
+	    input.property('value', degStr);
+	    corePreferences('validate-square-degrees', degStr);
+	    context.validator().revalidateUnsquare();
 	  }
-	};
 
-	/**
-	 * Object with properties corresponding to the geometry types. Property values
-	 * are functions that do the actual parsing.
-	 * @private
-	 */
-	var parse$1 = {
-	  /**
-	   * Return point geometry given a point WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the point.
-	   * @return {Point} A point geometry.
-	   * @private
-	   */
-	  point: function point (str) {
-	    if (str === undefined) {
-	      return this.geometryFactory.createPoint()
-	    }
+	  function isRuleEnabled(d) {
+	    return context.validator().isRuleEnabled(d);
+	  }
 
-	    var coords = str.trim().split(regExes.spaces);
-	    return this.geometryFactory.createPoint(new Coordinate(Number.parseFloat(coords[0]),
-	      Number.parseFloat(coords[1])))
-	  },
+	  function toggleRule(d3_event, d) {
+	    context.validator().toggleRule(d);
+	  }
 
-	  /**
-	   * Return a multipoint geometry given a multipoint WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the multipoint.
-	   * @return {Point} A multipoint feature.
-	   * @private
-	   */
-	  multipoint: function multipoint (str) {
-	    var this$1 = this;
+	  context.validator().on('validated.uiSectionValidationRules', function () {
+	    window.requestIdleCallback(section.reRender);
+	  });
+	  return section;
+	}
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createMultiPoint()
-	    }
+	function uiSectionValidationStatus(context) {
+	  var section = uiSection('issues-status', context).content(renderContent).shouldDisplay(function () {
+	    var issues = context.validator().getIssues(getOptions());
+	    return issues.length === 0;
+	  });
 
-	    var point;
-	    var points = str.trim().split(',');
-	    var components = [];
-	    for (var i = 0, len = points.length; i < len; ++i) {
-	      point = points[i].replace(regExes.trimParens, '$1');
-	      components.push(parse$1.point.apply(this$1, [point]));
-	    }
-	    return this.geometryFactory.createMultiPoint(components)
-	  },
+	  function getOptions() {
+	    return {
+	      what: corePreferences('validate-what') || 'edited',
+	      where: corePreferences('validate-where') || 'all'
+	    };
+	  }
 
-	  /**
-	   * Return a linestring geometry given a linestring WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the linestring.
-	   * @return {LineString} A linestring geometry.
-	   * @private
-	   */
-	  linestring: function linestring (str) {
-	    if (str === undefined) {
-	      return this.geometryFactory.createLineString()
-	    }
+	  function renderContent(selection) {
+	    var box = selection.selectAll('.box').data([0]);
+	    var boxEnter = box.enter().append('div').attr('class', 'box');
+	    boxEnter.append('div').call(svgIcon('#iD-icon-apply', 'pre-text'));
+	    var noIssuesMessage = boxEnter.append('span');
+	    noIssuesMessage.append('strong').attr('class', 'message');
+	    noIssuesMessage.append('br');
+	    noIssuesMessage.append('span').attr('class', 'details');
+	    renderIgnoredIssuesReset(selection);
+	    setNoIssuesText(selection);
+	  }
 
-	    var points = str.trim().split(',');
-	    var components = [];
-	    var coords;
-	    for (var i = 0, len = points.length; i < len; ++i) {
-	      coords = points[i].trim().split(regExes.spaces);
-	      components.push(new Coordinate(Number.parseFloat(coords[0]), Number.parseFloat(coords[1])));
-	    }
-	    return this.geometryFactory.createLineString(components)
-	  },
+	  function renderIgnoredIssuesReset(selection) {
+	    var ignoredIssues = context.validator().getIssues({
+	      what: 'all',
+	      where: 'all',
+	      includeDisabledRules: true,
+	      includeIgnored: 'only'
+	    });
+	    var resetIgnored = selection.selectAll('.reset-ignored').data(ignoredIssues.length ? [0] : []); // exit
 
-	  /**
-	   * Return a linearring geometry given a linearring WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the linearring.
-	   * @return {LinearRing} A linearring geometry.
-	   * @private
-	   */
-	  linearring: function linearring (str) {
-	    if (str === undefined) {
-	      return this.geometryFactory.createLinearRing()
-	    }
+	    resetIgnored.exit().remove(); // enter
+
+	    var resetIgnoredEnter = resetIgnored.enter().append('div').attr('class', 'reset-ignored section-footer');
+	    resetIgnoredEnter.append('a').attr('href', '#'); // update
+
+	    resetIgnored = resetIgnored.merge(resetIgnoredEnter);
+	    resetIgnored.select('a').html(_t.html('inspector.title_count', {
+	      title: {
+	        html: _t.html('issues.reset_ignored')
+	      },
+	      count: ignoredIssues.length
+	    }));
+	    resetIgnored.on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.validator().resetIgnoredIssues();
+	    });
+	  }
+
+	  function setNoIssuesText(selection) {
+	    var opts = getOptions();
 
-	    var points = str.trim().split(',');
-	    var components = [];
-	    var coords;
-	    for (var i = 0, len = points.length; i < len; ++i) {
-	      coords = points[i].trim().split(regExes.spaces);
-	      components.push(new Coordinate(Number.parseFloat(coords[0]), Number.parseFloat(coords[1])));
+	    function checkForHiddenIssues(cases) {
+	      for (var type in cases) {
+	        var hiddenOpts = cases[type];
+	        var hiddenIssues = context.validator().getIssues(hiddenOpts);
+
+	        if (hiddenIssues.length) {
+	          selection.select('.box .details').html('').call(_t.append('issues.no_issues.hidden_issues.' + type, {
+	            count: hiddenIssues.length.toString()
+	          }));
+	          return;
+	        }
+	      }
+
+	      selection.select('.box .details').html('').call(_t.append('issues.no_issues.hidden_issues.none'));
 	    }
-	    return this.geometryFactory.createLinearRing(components)
-	  },
 
-	  /**
-	   * Return a multilinestring geometry given a multilinestring WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the multilinestring.
-	   * @return {MultiLineString} A multilinestring geometry.
-	   * @private
-	   */
-	  multilinestring: function multilinestring (str) {
-	    var this$1 = this;
+	    var messageType;
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createMultiLineString()
+	    if (opts.what === 'edited' && opts.where === 'visible') {
+	      messageType = 'edits_in_view';
+	      checkForHiddenIssues({
+	        elsewhere: {
+	          what: 'edited',
+	          where: 'all'
+	        },
+	        everything_else: {
+	          what: 'all',
+	          where: 'visible'
+	        },
+	        disabled_rules: {
+	          what: 'edited',
+	          where: 'visible',
+	          includeDisabledRules: 'only'
+	        },
+	        everything_else_elsewhere: {
+	          what: 'all',
+	          where: 'all'
+	        },
+	        disabled_rules_elsewhere: {
+	          what: 'edited',
+	          where: 'all',
+	          includeDisabledRules: 'only'
+	        },
+	        ignored_issues: {
+	          what: 'edited',
+	          where: 'visible',
+	          includeIgnored: 'only'
+	        },
+	        ignored_issues_elsewhere: {
+	          what: 'edited',
+	          where: 'all',
+	          includeIgnored: 'only'
+	        }
+	      });
+	    } else if (opts.what === 'edited' && opts.where === 'all') {
+	      messageType = 'edits';
+	      checkForHiddenIssues({
+	        everything_else: {
+	          what: 'all',
+	          where: 'all'
+	        },
+	        disabled_rules: {
+	          what: 'edited',
+	          where: 'all',
+	          includeDisabledRules: 'only'
+	        },
+	        ignored_issues: {
+	          what: 'edited',
+	          where: 'all',
+	          includeIgnored: 'only'
+	        }
+	      });
+	    } else if (opts.what === 'all' && opts.where === 'visible') {
+	      messageType = 'everything_in_view';
+	      checkForHiddenIssues({
+	        elsewhere: {
+	          what: 'all',
+	          where: 'all'
+	        },
+	        disabled_rules: {
+	          what: 'all',
+	          where: 'visible',
+	          includeDisabledRules: 'only'
+	        },
+	        disabled_rules_elsewhere: {
+	          what: 'all',
+	          where: 'all',
+	          includeDisabledRules: 'only'
+	        },
+	        ignored_issues: {
+	          what: 'all',
+	          where: 'visible',
+	          includeIgnored: 'only'
+	        },
+	        ignored_issues_elsewhere: {
+	          what: 'all',
+	          where: 'all',
+	          includeIgnored: 'only'
+	        }
+	      });
+	    } else if (opts.what === 'all' && opts.where === 'all') {
+	      messageType = 'everything';
+	      checkForHiddenIssues({
+	        disabled_rules: {
+	          what: 'all',
+	          where: 'all',
+	          includeDisabledRules: 'only'
+	        },
+	        ignored_issues: {
+	          what: 'all',
+	          where: 'all',
+	          includeIgnored: 'only'
+	        }
+	      });
 	    }
 
-	    var line;
-	    var lines = str.trim().split(regExes.parenComma);
-	    var components = [];
-	    for (var i = 0, len = lines.length; i < len; ++i) {
-	      line = lines[i].replace(regExes.trimParens, '$1');
-	      components.push(parse$1.linestring.apply(this$1, [line]));
+	    if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
+	      messageType = 'no_edits';
 	    }
-	    return this.geometryFactory.createMultiLineString(components)
-	  },
 
-	  /**
-	   * Return a polygon geometry given a polygon WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the polygon.
-	   * @return {Polygon} A polygon geometry.
-	   * @private
-	   */
-	  polygon: function polygon (str) {
-	    var this$1 = this;
+	    selection.select('.box .message').html('').call(_t.append('issues.no_issues.message.' + messageType));
+	  }
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createPolygon()
-	    }
+	  context.validator().on('validated.uiSectionValidationStatus', function () {
+	    window.requestIdleCallback(section.reRender);
+	  });
+	  context.map().on('move.uiSectionValidationStatus', debounce(function () {
+	    window.requestIdleCallback(section.reRender);
+	  }, 1000));
+	  return section;
+	}
 
-	    var ring, linestring, linearring;
-	    var rings = str.trim().split(regExes.parenComma);
-	    var shell;
-	    var holes = [];
-	    for (var i = 0, len = rings.length; i < len; ++i) {
-	      ring = rings[i].replace(regExes.trimParens, '$1');
-	      linestring = parse$1.linestring.apply(this$1, [ring]);
-	      linearring = this$1.geometryFactory.createLinearRing(linestring._points);
-	      if (i === 0) {
-	        shell = linearring;
+	function uiPaneIssues(context) {
+	  var issuesPane = uiPane('issues', context).key(_t('issues.key')).label(_t.html('issues.title')).description(_t.html('issues.title')).iconName('iD-icon-alert').sections([uiSectionValidationOptions(context), uiSectionValidationStatus(context), uiSectionValidationIssues('issues-errors', 'error', context), uiSectionValidationIssues('issues-warnings', 'warning', context), uiSectionValidationRules(context)]);
+	  return issuesPane;
+	}
+
+	function uiSettingsCustomData(context) {
+	  var dispatch = dispatch$8('change');
+
+	  function render(selection) {
+	    var dataLayer = context.layers().layer('data'); // keep separate copies of original and current settings
+
+	    var _origSettings = {
+	      fileList: dataLayer && dataLayer.fileList() || null,
+	      url: corePreferences('settings-custom-data-url')
+	    };
+	    var _currSettings = {
+	      fileList: dataLayer && dataLayer.fileList() || null,
+	      url: corePreferences('settings-custom-data-url')
+	    }; // var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
+
+	    var modal = uiConfirm(selection).okButton();
+	    modal.classed('settings-modal settings-custom-data', true);
+	    modal.select('.modal-section.header').append('h3').call(_t.append('settings.custom_data.header'));
+	    var textSection = modal.select('.modal-section.message-text');
+	    textSection.append('pre').attr('class', 'instructions-file').call(_t.append('settings.custom_data.file.instructions'));
+	    textSection.append('input').attr('class', 'field-file').attr('type', 'file').attr('accept', '.gpx,.kml,.geojson,.json,application/gpx+xml,application/vnd.google-earth.kml+xml,application/geo+json,application/json').property('files', _currSettings.fileList) // works for all except IE11
+	    .on('change', function (d3_event) {
+	      var files = d3_event.target.files;
+
+	      if (files && files.length) {
+	        _currSettings.url = '';
+	        textSection.select('.field-url').property('value', '');
+	        _currSettings.fileList = files;
 	      } else {
-	        holes.push(linearring);
+	        _currSettings.fileList = null;
 	      }
-	    }
-	    return this.geometryFactory.createPolygon(shell, holes)
-	  },
+	    });
+	    textSection.append('h4').call(_t.append('settings.custom_data.or'));
+	    textSection.append('pre').attr('class', 'instructions-url').call(_t.append('settings.custom_data.url.instructions'));
+	    textSection.append('textarea').attr('class', 'field-url').attr('placeholder', _t('settings.custom_data.url.placeholder')).call(utilNoAuto).property('value', _currSettings.url); // insert a cancel button
 
-	  /**
-	   * Return a multipolygon geometry given a multipolygon WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the multipolygon.
-	   * @return {MultiPolygon} A multipolygon geometry.
-	   * @private
-	   */
-	  multipolygon: function multipolygon (str) {
-	    var this$1 = this;
+	    var buttonSection = modal.select('.modal-section.buttons');
+	    buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').call(_t.append('confirm.cancel'));
+	    buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
+	    buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createMultiPolygon()
-	    }
+	    function isSaveDisabled() {
+	      return null;
+	    } // restore the original url
 
-	    var polygon;
-	    var polygons = str.trim().split(regExes.doubleParenComma);
-	    var components = [];
-	    for (var i = 0, len = polygons.length; i < len; ++i) {
-	      polygon = polygons[i].replace(regExes.trimParens, '$1');
-	      components.push(parse$1.polygon.apply(this$1, [polygon]));
-	    }
-	    return this.geometryFactory.createMultiPolygon(components)
-	  },
 
-	  /**
-	   * Return a geometrycollection given a geometrycollection WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the geometrycollection.
-	   * @return {GeometryCollection}
-	   * @private
-	   */
-	  geometrycollection: function geometrycollection (str) {
-	    var this$1 = this;
+	    function clickCancel() {
+	      textSection.select('.field-url').property('value', _origSettings.url);
+	      corePreferences('settings-custom-data-url', _origSettings.url);
+	      this.blur();
+	      modal.close();
+	    } // accept the current url
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createGeometryCollection()
-	    }
 
-	    // separate components of the collection with |
-	    str = str.replace(/,\s*([A-Za-z])/g, '|$1');
-	    var wktArray = str.trim().split('|');
-	    var components = [];
-	    for (var i = 0, len = wktArray.length; i < len; ++i) {
-	      components.push(this$1.read(wktArray[i]));
-	    }
-	    return this.geometryFactory.createGeometryCollection(components)
-	  }
-	};
+	    function clickSave() {
+	      _currSettings.url = textSection.select('.field-url').property('value').trim(); // one or the other but not both
 
-	/**
-	 * Writes the Well-Known Text representation of a {@link Geometry}. The
-	 * Well-Known Text format is defined in the <A
-	 * HREF="http://www.opengis.org/techno/specs.htm"> OGC Simple Features
-	 * Specification for SQL</A>.
-	 * <p>
-	 * The <code>WKTWriter</code> outputs coordinates rounded to the precision
-	 * model. Only the maximum number of decimal places necessary to represent the
-	 * ordinates to the required precision will be output.
-	 * <p>
-	 * The SFS WKT spec does not define a special tag for {@link LinearRing}s.
-	 * Under the spec, rings are output as <code>LINESTRING</code>s.
-	 */
+	      if (_currSettings.url) {
+	        _currSettings.fileList = null;
+	      }
 
-	/**
-	 * @param {GeometryFactory} geometryFactory
-	 * @constructor
-	 */
-	var WKTWriter = function WKTWriter (geometryFactory) {
-	  this.parser = new WKTParser(geometryFactory);
-	};
+	      if (_currSettings.fileList) {
+	        _currSettings.url = '';
+	      }
 
-	/**
-	 * Converts a <code>Geometry</code> to its Well-known Text representation.
-	 *
-	 * @param {Geometry} geometry a <code>Geometry</code> to process.
-	 * @return {string} a <Geometry Tagged Text> string (see the OpenGIS Simple
-	 *       Features Specification).
-	 * @memberof WKTWriter
-	 */
-	WKTWriter.prototype.write = function write (geometry) {
-	  return this.parser.write(geometry)
-	};
-	/**
-	 * Generates the WKT for a <tt>LINESTRING</tt> specified by two
-	 * {@link Coordinate}s.
-	 *
-	 * @param p0 the first coordinate.
-	 * @param p1 the second coordinate.
-	 *
-	 * @return the WKT.
-	 * @private
-	 */
-	WKTWriter.toLineString = function toLineString (p0, p1) {
-	  if (arguments.length !== 2) {
-	    throw new Error('Not implemented')
+	      corePreferences('settings-custom-data-url', _currSettings.url);
+	      this.blur();
+	      modal.close();
+	      dispatch.call('change', this, _currSettings);
+	    }
 	  }
-	  return 'LINESTRING ( ' + p0.x + ' ' + p0.y + ', ' + p1.x + ' ' + p1.y + ' )'
-	};
 
-	var RuntimeException = (function (Error) {
-	  function RuntimeException (message) {
-	    Error.call(this, message);
-	    this.name = 'RuntimeException';
-	    this.message = message;
-	    this.stack = (new Error()).stack;
-	  }
+	  return utilRebind(render, dispatch, 'on');
+	}
+
+	function uiSectionDataLayers(context) {
+	  var settingsCustomData = uiSettingsCustomData(context).on('change', customChanged);
+	  var layers = context.layers();
+	  var section = uiSection('data-layers', context).label(_t.html('map_data.data_layers')).disclosureContent(renderDisclosureContent);
 
-	  if ( Error ) { RuntimeException.__proto__ = Error; }
-	  RuntimeException.prototype = Object.create( Error && Error.prototype );
-	  RuntimeException.prototype.constructor = RuntimeException;
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.data-layer-container').data([0]);
+	    container.enter().append('div').attr('class', 'data-layer-container').merge(container).call(drawOsmItems).call(drawQAItems).call(drawCustomDataItems).call(drawVectorItems) // Beta - Detroit mapping challenge
+	    .call(drawPanelItems);
+	  }
 
-	  return RuntimeException;
-	}(Error));
+	  function showsLayer(which) {
+	    var layer = layers.layer(which);
 
-	var AssertionFailedException = (function (RuntimeException$$1) {
-	  function AssertionFailedException () {
-	    RuntimeException$$1.call(this);
-	    if (arguments.length === 0) {
-	      RuntimeException$$1.call(this);
-	    } else if (arguments.length === 1) {
-	      var message = arguments[0];
-	      RuntimeException$$1.call(this, message);
+	    if (layer) {
+	      return layer.enabled();
 	    }
+
+	    return false;
 	  }
 
-	  if ( RuntimeException$$1 ) { AssertionFailedException.__proto__ = RuntimeException$$1; }
-	  AssertionFailedException.prototype = Object.create( RuntimeException$$1 && RuntimeException$$1.prototype );
-	  AssertionFailedException.prototype.constructor = AssertionFailedException;
-	  AssertionFailedException.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  AssertionFailedException.prototype.getClass = function getClass () {
-	    return AssertionFailedException
-	  };
+	  function setLayer(which, enabled) {
+	    // Don't allow layer changes while drawing - #6584
+	    var mode = context.mode();
+	    if (mode && /^draw/.test(mode.id)) return;
+	    var layer = layers.layer(which);
 
-	  return AssertionFailedException;
-	}(RuntimeException));
+	    if (layer) {
+	      layer.enabled(enabled);
 
-	var Assert = function Assert () {};
+	      if (!enabled && (which === 'osm' || which === 'notes')) {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
+	  }
 
-	Assert.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Assert.prototype.getClass = function getClass () {
-	  return Assert
-	};
-	Assert.shouldNeverReachHere = function shouldNeverReachHere () {
-	  if (arguments.length === 0) {
-	    Assert.shouldNeverReachHere(null);
-	  } else if (arguments.length === 1) {
-	    var message = arguments[0];
-	    throw new AssertionFailedException('Should never reach here' + (message !== null ? ': ' + message : ''))
+	  function toggleLayer(which) {
+	    setLayer(which, !showsLayer(which));
 	  }
-	};
-	Assert.isTrue = function isTrue () {
-	  var assertion;
-	  var message;
-	  if (arguments.length === 1) {
-	    assertion = arguments[0];
-	    Assert.isTrue(assertion, null);
-	  } else if (arguments.length === 2) {
-	    assertion = arguments[0];
-	    message = arguments[1];
-	    if (!assertion) {
-	      if (message === null) {
-	        throw new AssertionFailedException()
+
+	  function drawOsmItems(selection) {
+	    var osmKeys = ['osm', 'notes'];
+	    var osmLayers = layers.all().filter(function (obj) {
+	      return osmKeys.indexOf(obj.id) !== -1;
+	    });
+	    var ul = selection.selectAll('.layer-list-osm').data([0]);
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-osm').merge(ul);
+	    var li = ul.selectAll('.list-item').data(osmLayers);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', function (d) {
+	      return 'list-item list-item-' + d.id;
+	    });
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      if (d.id === 'osm') {
+	        select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).keys([uiCmd('⌥' + _t('area_fill.wireframe.key'))]).placement('bottom'));
 	      } else {
-	        throw new AssertionFailedException(message)
+	        select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).placement('bottom'));
 	      }
-	    }
-	  }
-	};
-	Assert.equals = function equals () {
-	  var expectedValue;
-	  var actualValue;
-	  var message;
-	  if (arguments.length === 2) {
-	    expectedValue = arguments[0];
-	    actualValue = arguments[1];
-	    Assert.equals(expectedValue, actualValue, null);
-	  } else if (arguments.length === 3) {
-	    expectedValue = arguments[0];
-	    actualValue = arguments[1];
-	    message = arguments[2];
-	    if (!actualValue.equals(expectedValue)) {
-	      throw new AssertionFailedException('Expected ' + expectedValue + ' but encountered ' + actualValue + (message !== null ? ': ' + message : ''))
-	    }
+	    });
+	    labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+	      toggleLayer(d.id);
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      return _t.html('map_data.layers.' + d.id + '.title');
+	    }); // Update
+
+	    li.merge(liEnter).classed('active', function (d) {
+	      return d.layer.enabled();
+	    }).selectAll('input').property('checked', function (d) {
+	      return d.layer.enabled();
+	    });
 	  }
-	};
 
-	var LineIntersector = function LineIntersector () {
-	  this._result = null;
-	  this._inputLines = Array(2).fill().map(function () { return Array(2); });
-	  this._intPt = new Array(2).fill(null);
-	  this._intLineIndex = null;
-	  this._isProper = null;
-	  this._pa = null;
-	  this._pb = null;
-	  this._precisionModel = null;
-	  this._intPt[0] = new Coordinate();
-	  this._intPt[1] = new Coordinate();
-	  this._pa = this._intPt[0];
-	  this._pb = this._intPt[1];
-	  this._result = 0;
-	};
+	  function drawQAItems(selection) {
+	    var qaKeys = ['keepRight', 'improveOSM', 'osmose'];
+	    var qaLayers = layers.all().filter(function (obj) {
+	      return qaKeys.indexOf(obj.id) !== -1;
+	    });
+	    var ul = selection.selectAll('.layer-list-qa').data([0]);
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-qa').merge(ul);
+	    var li = ul.selectAll('.list-item').data(qaLayers);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', function (d) {
+	      return 'list-item list-item-' + d.id;
+	    });
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).placement('bottom'));
+	    });
+	    labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+	      toggleLayer(d.id);
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      return _t.html('map_data.layers.' + d.id + '.title');
+	    }); // Update
+
+	    li.merge(liEnter).classed('active', function (d) {
+	      return d.layer.enabled();
+	    }).selectAll('input').property('checked', function (d) {
+	      return d.layer.enabled();
+	    });
+	  } // Beta feature - sample vector layers to support Detroit Mapping Challenge
+	  // https://github.com/osmus/detroit-mapping-challenge
 
-	var staticAccessors$10 = { DONT_INTERSECT: { configurable: true },DO_INTERSECT: { configurable: true },COLLINEAR: { configurable: true },NO_INTERSECTION: { configurable: true },POINT_INTERSECTION: { configurable: true },COLLINEAR_INTERSECTION: { configurable: true } };
-	LineIntersector.prototype.getIndexAlongSegment = function getIndexAlongSegment (segmentIndex, intIndex) {
-	  this.computeIntLineIndex();
-	  return this._intLineIndex[segmentIndex][intIndex]
-	};
-	LineIntersector.prototype.getTopologySummary = function getTopologySummary () {
-	  var catBuf = new StringBuffer();
-	  if (this.isEndPoint()) { catBuf.append(' endpoint'); }
-	  if (this._isProper) { catBuf.append(' proper'); }
-	  if (this.isCollinear()) { catBuf.append(' collinear'); }
-	  return catBuf.toString()
-	};
-	LineIntersector.prototype.computeIntersection = function computeIntersection (p1, p2, p3, p4) {
-	  this._inputLines[0][0] = p1;
-	  this._inputLines[0][1] = p2;
-	  this._inputLines[1][0] = p3;
-	  this._inputLines[1][1] = p4;
-	  this._result = this.computeIntersect(p1, p2, p3, p4);
-	};
-	LineIntersector.prototype.getIntersectionNum = function getIntersectionNum () {
-	  return this._result
-	};
-	LineIntersector.prototype.computeIntLineIndex = function computeIntLineIndex () {
-	  if (arguments.length === 0) {
-	    if (this._intLineIndex === null) {
-	      this._intLineIndex = Array(2).fill().map(function () { return Array(2); });
-	      this.computeIntLineIndex(0);
-	      this.computeIntLineIndex(1);
-	    }
-	  } else if (arguments.length === 1) {
-	    var segmentIndex = arguments[0];
-	    var dist0 = this.getEdgeDistance(segmentIndex, 0);
-	    var dist1 = this.getEdgeDistance(segmentIndex, 1);
-	    if (dist0 > dist1) {
-	      this._intLineIndex[segmentIndex][0] = 0;
-	      this._intLineIndex[segmentIndex][1] = 1;
-	    } else {
-	      this._intLineIndex[segmentIndex][0] = 1;
-	      this._intLineIndex[segmentIndex][1] = 0;
+
+	  function drawVectorItems(selection) {
+	    var dataLayer = layers.layer('data');
+	    var vtData = [{
+	      name: 'Detroit Neighborhoods/Parks',
+	      src: 'neighborhoods-parks',
+	      tooltip: 'Neighborhood boundaries and parks as compiled by City of Detroit in concert with community groups.',
+	      template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmur6x34562qp9iv1u3ksf-54hev,jonahadkins.cjksmqxdx33jj2wp90xd9x2md-4e5y2/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
+	    }, {
+	      name: 'Detroit Composite POIs',
+	      src: 'composite-poi',
+	      tooltip: 'Fire Inspections, Business Licenses, and other public location data collated from the City of Detroit.',
+	      template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmm6a02sli31myxhsr7zf3-2sw8h/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
+	    }, {
+	      name: 'Detroit All-The-Places POIs',
+	      src: 'alltheplaces-poi',
+	      tooltip: 'Public domain business location data created by web scrapers.',
+	      template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmswgk340g2vo06p1w9w0j-8fjjc/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
+	    }]; // Only show this if the map is around Detroit..
+
+	    var detroit = geoExtent([-83.5, 42.1], [-82.8, 42.5]);
+	    var showVectorItems = context.map().zoom() > 9 && detroit.contains(context.map().center());
+	    var container = selection.selectAll('.vectortile-container').data(showVectorItems ? [0] : []);
+	    container.exit().remove();
+	    var containerEnter = container.enter().append('div').attr('class', 'vectortile-container');
+	    containerEnter.append('h4').attr('class', 'vectortile-header').text('Detroit Vector Tiles (Beta)');
+	    containerEnter.append('ul').attr('class', 'layer-list layer-list-vectortile');
+	    containerEnter.append('div').attr('class', 'vectortile-footer').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/osmus/detroit-mapping-challenge').append('span').text('About these layers');
+	    container = container.merge(containerEnter);
+	    var ul = container.selectAll('.layer-list-vectortile');
+	    var li = ul.selectAll('.list-item').data(vtData);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', function (d) {
+	      return 'list-item list-item-' + d.src;
+	    });
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      select(this).call(uiTooltip().title(d.tooltip).placement('top'));
+	    });
+	    labelEnter.append('input').attr('type', 'radio').attr('name', 'vectortile').on('change', selectVTLayer);
+	    labelEnter.append('span').text(function (d) {
+	      return d.name;
+	    }); // Update
+
+	    li.merge(liEnter).classed('active', isVTLayerSelected).selectAll('input').property('checked', isVTLayerSelected);
+
+	    function isVTLayerSelected(d) {
+	      return dataLayer && dataLayer.template() === d.template;
 	    }
-	  }
-	};
-	LineIntersector.prototype.isProper = function isProper () {
-	  return this.hasIntersection() && this._isProper
-	};
-	LineIntersector.prototype.setPrecisionModel = function setPrecisionModel (precisionModel) {
-	  this._precisionModel = precisionModel;
-	};
-	LineIntersector.prototype.isInteriorIntersection = function isInteriorIntersection () {
-	    var this$1 = this;
 
-	  if (arguments.length === 0) {
-	    if (this.isInteriorIntersection(0)) { return true }
-	    if (this.isInteriorIntersection(1)) { return true }
-	    return false
-	  } else if (arguments.length === 1) {
-	    var inputLineIndex = arguments[0];
-	    for (var i = 0; i < this._result; i++) {
-	      if (!(this$1._intPt[i].equals2D(this$1._inputLines[inputLineIndex][0]) || this$1._intPt[i].equals2D(this$1._inputLines[inputLineIndex][1]))) {
-	        return true
+	    function selectVTLayer(d3_event, d) {
+	      corePreferences('settings-custom-data-url', d.template);
+
+	      if (dataLayer) {
+	        dataLayer.template(d.template, d.src);
+	        dataLayer.enabled(true);
 	      }
 	    }
-	    return false
 	  }
-	};
-	LineIntersector.prototype.getIntersection = function getIntersection (intIndex) {
-	  return this._intPt[intIndex]
-	};
-	LineIntersector.prototype.isEndPoint = function isEndPoint () {
-	  return this.hasIntersection() && !this._isProper
-	};
-	LineIntersector.prototype.hasIntersection = function hasIntersection () {
-	  return this._result !== LineIntersector.NO_INTERSECTION
-	};
-	LineIntersector.prototype.getEdgeDistance = function getEdgeDistance (segmentIndex, intIndex) {
-	  var dist = LineIntersector.computeEdgeDistance(this._intPt[intIndex], this._inputLines[segmentIndex][0], this._inputLines[segmentIndex][1]);
-	  return dist
-	};
-	LineIntersector.prototype.isCollinear = function isCollinear () {
-	  return this._result === LineIntersector.COLLINEAR_INTERSECTION
-	};
-	LineIntersector.prototype.toString = function toString () {
-	  return WKTWriter.toLineString(this._inputLines[0][0], this._inputLines[0][1]) + ' - ' + WKTWriter.toLineString(this._inputLines[1][0], this._inputLines[1][1]) + this.getTopologySummary()
-	};
-	LineIntersector.prototype.getEndpoint = function getEndpoint (segmentIndex, ptIndex) {
-	  return this._inputLines[segmentIndex][ptIndex]
-	};
-	LineIntersector.prototype.isIntersection = function isIntersection (pt) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < this._result; i++) {
-	    if (this$1._intPt[i].equals2D(pt)) {
-	      return true
-	    }
-	  }
-	  return false
-	};
-	LineIntersector.prototype.getIntersectionAlongSegment = function getIntersectionAlongSegment (segmentIndex, intIndex) {
-	  this.computeIntLineIndex();
-	  return this._intPt[this._intLineIndex[segmentIndex][intIndex]]
-	};
-	LineIntersector.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	LineIntersector.prototype.getClass = function getClass () {
-	  return LineIntersector
-	};
-	LineIntersector.computeEdgeDistance = function computeEdgeDistance (p, p0, p1) {
-	  var dx = Math.abs(p1.x - p0.x);
-	  var dy = Math.abs(p1.y - p0.y);
-	  var dist = -1.0;
-	  if (p.equals(p0)) {
-	    dist = 0.0;
-	  } else if (p.equals(p1)) {
-	    if (dx > dy) { dist = dx; } else { dist = dy; }
-	  } else {
-	    var pdx = Math.abs(p.x - p0.x);
-	    var pdy = Math.abs(p.y - p0.y);
-	    if (dx > dy) { dist = pdx; } else { dist = pdy; }
-	    if (dist === 0.0 && !p.equals(p0)) {
-	      dist = Math.max(pdx, pdy);
-	    }
-	  }
-	  Assert.isTrue(!(dist === 0.0 && !p.equals(p0)), 'Bad distance calculation');
-	  return dist
-	};
-	LineIntersector.nonRobustComputeEdgeDistance = function nonRobustComputeEdgeDistance (p, p1, p2) {
-	  var dx = p.x - p1.x;
-	  var dy = p.y - p1.y;
-	  var dist = Math.sqrt(dx * dx + dy * dy);
-	  Assert.isTrue(!(dist === 0.0 && !p.equals(p1)), 'Invalid distance calculation');
-	  return dist
-	};
-	staticAccessors$10.DONT_INTERSECT.get = function () { return 0 };
-	staticAccessors$10.DO_INTERSECT.get = function () { return 1 };
-	staticAccessors$10.COLLINEAR.get = function () { return 2 };
-	staticAccessors$10.NO_INTERSECTION.get = function () { return 0 };
-	staticAccessors$10.POINT_INTERSECTION.get = function () { return 1 };
-	staticAccessors$10.COLLINEAR_INTERSECTION.get = function () { return 2 };
-
-	Object.defineProperties( LineIntersector, staticAccessors$10 );
-
-	var RobustLineIntersector = (function (LineIntersector$$1) {
-	  function RobustLineIntersector () {
-	    LineIntersector$$1.apply(this, arguments);
-	  }
-
-	  if ( LineIntersector$$1 ) { RobustLineIntersector.__proto__ = LineIntersector$$1; }
-	  RobustLineIntersector.prototype = Object.create( LineIntersector$$1 && LineIntersector$$1.prototype );
-	  RobustLineIntersector.prototype.constructor = RobustLineIntersector;
-
-	  RobustLineIntersector.prototype.isInSegmentEnvelopes = function isInSegmentEnvelopes (intPt) {
-	    var env0 = new Envelope(this._inputLines[0][0], this._inputLines[0][1]);
-	    var env1 = new Envelope(this._inputLines[1][0], this._inputLines[1][1]);
-	    return env0.contains(intPt) && env1.contains(intPt)
-	  };
-	  RobustLineIntersector.prototype.computeIntersection = function computeIntersection () {
-	    if (arguments.length === 3) {
-	      var p = arguments[0];
-	      var p1 = arguments[1];
-	      var p2 = arguments[2];
-	      this._isProper = false;
-	      if (Envelope.intersects(p1, p2, p)) {
-	        if (CGAlgorithms.orientationIndex(p1, p2, p) === 0 && CGAlgorithms.orientationIndex(p2, p1, p) === 0) {
-	          this._isProper = true;
-	          if (p.equals(p1) || p.equals(p2)) {
-	            this._isProper = false;
-	          }
-	          this._result = LineIntersector$$1.POINT_INTERSECTION;
-	          return null
-	        }
-	      }
-	      this._result = LineIntersector$$1.NO_INTERSECTION;
-	    } else { return LineIntersector$$1.prototype.computeIntersection.apply(this, arguments) }
-	  };
-	  RobustLineIntersector.prototype.normalizeToMinimum = function normalizeToMinimum (n1, n2, n3, n4, normPt) {
-	    normPt.x = this.smallestInAbsValue(n1.x, n2.x, n3.x, n4.x);
-	    normPt.y = this.smallestInAbsValue(n1.y, n2.y, n3.y, n4.y);
-	    n1.x -= normPt.x;
-	    n1.y -= normPt.y;
-	    n2.x -= normPt.x;
-	    n2.y -= normPt.y;
-	    n3.x -= normPt.x;
-	    n3.y -= normPt.y;
-	    n4.x -= normPt.x;
-	    n4.y -= normPt.y;
-	  };
-	  RobustLineIntersector.prototype.safeHCoordinateIntersection = function safeHCoordinateIntersection (p1, p2, q1, q2) {
-	    var intPt = null;
-	    try {
-	      intPt = HCoordinate.intersection(p1, p2, q1, q2);
-	    } catch (e) {
-	      if (e instanceof NotRepresentableException) {
-	        intPt = RobustLineIntersector.nearestEndpoint(p1, p2, q1, q2);
-	      } else { throw e }
-	    } finally {}
-	    return intPt
-	  };
-	  RobustLineIntersector.prototype.intersection = function intersection (p1, p2, q1, q2) {
-	    var intPt = this.intersectionWithNormalization(p1, p2, q1, q2);
-	    if (!this.isInSegmentEnvelopes(intPt)) {
-	      intPt = new Coordinate(RobustLineIntersector.nearestEndpoint(p1, p2, q1, q2));
-	    }
-	    if (this._precisionModel !== null) {
-	      this._precisionModel.makePrecise(intPt);
-	    }
-	    return intPt
-	  };
-	  RobustLineIntersector.prototype.smallestInAbsValue = function smallestInAbsValue (x1, x2, x3, x4) {
-	    var x = x1;
-	    var xabs = Math.abs(x);
-	    if (Math.abs(x2) < xabs) {
-	      x = x2;
-	      xabs = Math.abs(x2);
-	    }
-	    if (Math.abs(x3) < xabs) {
-	      x = x3;
-	      xabs = Math.abs(x3);
-	    }
-	    if (Math.abs(x4) < xabs) {
-	      x = x4;
-	    }
-	    return x
-	  };
-	  RobustLineIntersector.prototype.checkDD = function checkDD (p1, p2, q1, q2, intPt) {
-	    var intPtDD = CGAlgorithmsDD.intersection(p1, p2, q1, q2);
-	    var isIn = this.isInSegmentEnvelopes(intPtDD);
-	    System.out.println('DD in env = ' + isIn + '  --------------------- ' + intPtDD);
-	    if (intPt.distance(intPtDD) > 0.0001) {
-	      System.out.println('Distance = ' + intPt.distance(intPtDD));
-	    }
-	  };
-	  RobustLineIntersector.prototype.intersectionWithNormalization = function intersectionWithNormalization (p1, p2, q1, q2) {
-	    var n1 = new Coordinate(p1);
-	    var n2 = new Coordinate(p2);
-	    var n3 = new Coordinate(q1);
-	    var n4 = new Coordinate(q2);
-	    var normPt = new Coordinate();
-	    this.normalizeToEnvCentre(n1, n2, n3, n4, normPt);
-	    var intPt = this.safeHCoordinateIntersection(n1, n2, n3, n4);
-	    intPt.x += normPt.x;
-	    intPt.y += normPt.y;
-	    return intPt
-	  };
-	  RobustLineIntersector.prototype.computeCollinearIntersection = function computeCollinearIntersection (p1, p2, q1, q2) {
-	    var p1q1p2 = Envelope.intersects(p1, p2, q1);
-	    var p1q2p2 = Envelope.intersects(p1, p2, q2);
-	    var q1p1q2 = Envelope.intersects(q1, q2, p1);
-	    var q1p2q2 = Envelope.intersects(q1, q2, p2);
-	    if (p1q1p2 && p1q2p2) {
-	      this._intPt[0] = q1;
-	      this._intPt[1] = q2;
-	      return LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    if (q1p1q2 && q1p2q2) {
-	      this._intPt[0] = p1;
-	      this._intPt[1] = p2;
-	      return LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    if (p1q1p2 && q1p1q2) {
-	      this._intPt[0] = q1;
-	      this._intPt[1] = p1;
-	      return q1.equals(p1) && !p1q2p2 && !q1p2q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    if (p1q1p2 && q1p2q2) {
-	      this._intPt[0] = q1;
-	      this._intPt[1] = p2;
-	      return q1.equals(p2) && !p1q2p2 && !q1p1q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    if (p1q2p2 && q1p1q2) {
-	      this._intPt[0] = q2;
-	      this._intPt[1] = p1;
-	      return q2.equals(p1) && !p1q1p2 && !q1p2q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    if (p1q2p2 && q1p2q2) {
-	      this._intPt[0] = q2;
-	      this._intPt[1] = p2;
-	      return q2.equals(p2) && !p1q1p2 && !q1p1q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    return LineIntersector$$1.NO_INTERSECTION
-	  };
-	  RobustLineIntersector.prototype.normalizeToEnvCentre = function normalizeToEnvCentre (n00, n01, n10, n11, normPt) {
-	    var minX0 = n00.x < n01.x ? n00.x : n01.x;
-	    var minY0 = n00.y < n01.y ? n00.y : n01.y;
-	    var maxX0 = n00.x > n01.x ? n00.x : n01.x;
-	    var maxY0 = n00.y > n01.y ? n00.y : n01.y;
-	    var minX1 = n10.x < n11.x ? n10.x : n11.x;
-	    var minY1 = n10.y < n11.y ? n10.y : n11.y;
-	    var maxX1 = n10.x > n11.x ? n10.x : n11.x;
-	    var maxY1 = n10.y > n11.y ? n10.y : n11.y;
-	    var intMinX = minX0 > minX1 ? minX0 : minX1;
-	    var intMaxX = maxX0 < maxX1 ? maxX0 : maxX1;
-	    var intMinY = minY0 > minY1 ? minY0 : minY1;
-	    var intMaxY = maxY0 < maxY1 ? maxY0 : maxY1;
-	    var intMidX = (intMinX + intMaxX) / 2.0;
-	    var intMidY = (intMinY + intMaxY) / 2.0;
-	    normPt.x = intMidX;
-	    normPt.y = intMidY;
-	    n00.x -= normPt.x;
-	    n00.y -= normPt.y;
-	    n01.x -= normPt.x;
-	    n01.y -= normPt.y;
-	    n10.x -= normPt.x;
-	    n10.y -= normPt.y;
-	    n11.x -= normPt.x;
-	    n11.y -= normPt.y;
-	  };
-	  RobustLineIntersector.prototype.computeIntersect = function computeIntersect (p1, p2, q1, q2) {
-	    this._isProper = false;
-	    if (!Envelope.intersects(p1, p2, q1, q2)) { return LineIntersector$$1.NO_INTERSECTION }
-	    var Pq1 = CGAlgorithms.orientationIndex(p1, p2, q1);
-	    var Pq2 = CGAlgorithms.orientationIndex(p1, p2, q2);
-	    if ((Pq1 > 0 && Pq2 > 0) || (Pq1 < 0 && Pq2 < 0)) {
-	      return LineIntersector$$1.NO_INTERSECTION
-	    }
-	    var Qp1 = CGAlgorithms.orientationIndex(q1, q2, p1);
-	    var Qp2 = CGAlgorithms.orientationIndex(q1, q2, p2);
-	    if ((Qp1 > 0 && Qp2 > 0) || (Qp1 < 0 && Qp2 < 0)) {
-	      return LineIntersector$$1.NO_INTERSECTION
-	    }
-	    var collinear = Pq1 === 0 && Pq2 === 0 && Qp1 === 0 && Qp2 === 0;
-	    if (collinear) {
-	      return this.computeCollinearIntersection(p1, p2, q1, q2)
-	    }
-	    if (Pq1 === 0 || Pq2 === 0 || Qp1 === 0 || Qp2 === 0) {
-	      this._isProper = false;
-	      if (p1.equals2D(q1) || p1.equals2D(q2)) {
-	        this._intPt[0] = p1;
-	      } else if (p2.equals2D(q1) || p2.equals2D(q2)) {
-	        this._intPt[0] = p2;
-	      } else if (Pq1 === 0) {
-	        this._intPt[0] = new Coordinate(q1);
-	      } else if (Pq2 === 0) {
-	        this._intPt[0] = new Coordinate(q2);
-	      } else if (Qp1 === 0) {
-	        this._intPt[0] = new Coordinate(p1);
-	      } else if (Qp2 === 0) {
-	        this._intPt[0] = new Coordinate(p2);
-	      }
-	    } else {
-	      this._isProper = true;
-	      this._intPt[0] = this.intersection(p1, p2, q1, q2);
-	    }
-	    return LineIntersector$$1.POINT_INTERSECTION
-	  };
-	  RobustLineIntersector.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  RobustLineIntersector.prototype.getClass = function getClass () {
-	    return RobustLineIntersector
-	  };
-	  RobustLineIntersector.nearestEndpoint = function nearestEndpoint (p1, p2, q1, q2) {
-	    var nearestPt = p1;
-	    var minDist = CGAlgorithms.distancePointLine(p1, q1, q2);
-	    var dist = CGAlgorithms.distancePointLine(p2, q1, q2);
-	    if (dist < minDist) {
-	      minDist = dist;
-	      nearestPt = p2;
-	    }
-	    dist = CGAlgorithms.distancePointLine(q1, p1, p2);
-	    if (dist < minDist) {
-	      minDist = dist;
-	      nearestPt = q1;
-	    }
-	    dist = CGAlgorithms.distancePointLine(q2, p1, p2);
-	    if (dist < minDist) {
-	      minDist = dist;
-	      nearestPt = q2;
-	    }
-	    return nearestPt
-	  };
+	  function drawCustomDataItems(selection) {
+	    var dataLayer = layers.layer('data');
+	    var hasData = dataLayer && dataLayer.hasData();
+	    var showsData = hasData && dataLayer.enabled();
+	    var ul = selection.selectAll('.layer-list-data').data(dataLayer ? [0] : []); // Exit
 
-	  return RobustLineIntersector;
-	}(LineIntersector));
+	    ul.exit().remove(); // Enter
 
-	var RobustDeterminant = function RobustDeterminant () {};
+	    var ulEnter = ul.enter().append('ul').attr('class', 'layer-list layer-list-data');
+	    var liEnter = ulEnter.append('li').attr('class', 'list-item-data');
+	    var labelEnter = liEnter.append('label').call(uiTooltip().title(_t.html('map_data.layers.custom.tooltip')).placement('top'));
+	    labelEnter.append('input').attr('type', 'checkbox').on('change', function () {
+	      toggleLayer('data');
+	    });
+	    labelEnter.append('span').call(_t.append('map_data.layers.custom.title'));
+	    liEnter.append('button').attr('class', 'open-data-options').call(uiTooltip().title(_t.html('settings.custom_data.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      editCustom();
+	    }).call(svgIcon('#iD-icon-more'));
+	    liEnter.append('button').attr('class', 'zoom-to-data').call(uiTooltip().title(_t.html('map_data.layers.custom.zoom')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+	      if (select(this).classed('disabled')) return;
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      dataLayer.fitZoom();
+	    }).call(svgIcon('#iD-icon-framed-dot', 'monochrome')); // Update
 
-	RobustDeterminant.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	RobustDeterminant.prototype.getClass = function getClass () {
-	  return RobustDeterminant
-	};
-	RobustDeterminant.orientationIndex = function orientationIndex (p1, p2, q) {
-	  var dx1 = p2.x - p1.x;
-	  var dy1 = p2.y - p1.y;
-	  var dx2 = q.x - p2.x;
-	  var dy2 = q.y - p2.y;
-	  return RobustDeterminant.signOfDet2x2(dx1, dy1, dx2, dy2)
-	};
-	RobustDeterminant.signOfDet2x2 = function signOfDet2x2 (x1, y1, x2, y2) {
-	  var sign = null;
-	  var swap = null;
-	  var k = null;
-	  sign = 1;
-	  if (x1 === 0.0 || y2 === 0.0) {
-	    if (y1 === 0.0 || x2 === 0.0) {
-	      return 0
-	    } else if (y1 > 0) {
-	      if (x2 > 0) {
-	        return -sign
-	      } else {
-	        return sign
-	      }
-	    } else {
-	      if (x2 > 0) {
-	        return sign
-	      } else {
-	        return -sign
-	      }
-	    }
+	    ul = ul.merge(ulEnter);
+	    ul.selectAll('.list-item-data').classed('active', showsData).selectAll('label').classed('deemphasize', !hasData).selectAll('input').property('disabled', !hasData).property('checked', showsData);
+	    ul.selectAll('button.zoom-to-data').classed('disabled', !hasData);
 	  }
-	  if (y1 === 0.0 || x2 === 0.0) {
-	    if (y2 > 0) {
-	      if (x1 > 0) {
-	        return sign
-	      } else {
-	        return -sign
-	      }
-	    } else {
-	      if (x1 > 0) {
-	        return -sign
-	      } else {
-	        return sign
-	      }
-	    }
+
+	  function editCustom() {
+	    context.container().call(settingsCustomData);
 	  }
-	  if (y1 > 0.0) {
-	    if (y2 > 0.0) {
-	      if (y1 <= y2) ; else {
-	        sign = -sign;
-	        swap = x1;
-	        x1 = x2;
-	        x2 = swap;
-	        swap = y1;
-	        y1 = y2;
-	        y2 = swap;
-	      }
-	    } else {
-	      if (y1 <= -y2) {
-	        sign = -sign;
-	        x2 = -x2;
-	        y2 = -y2;
-	      } else {
-	        swap = x1;
-	        x1 = -x2;
-	        x2 = swap;
-	        swap = y1;
-	        y1 = -y2;
-	        y2 = swap;
-	      }
-	    }
-	  } else {
-	    if (y2 > 0.0) {
-	      if (-y1 <= y2) {
-	        sign = -sign;
-	        x1 = -x1;
-	        y1 = -y1;
-	      } else {
-	        swap = -x1;
-	        x1 = x2;
-	        x2 = swap;
-	        swap = -y1;
-	        y1 = y2;
-	        y2 = swap;
-	      }
-	    } else {
-	      if (y1 >= y2) {
-	        x1 = -x1;
-	        y1 = -y1;
-	        x2 = -x2;
-	        y2 = -y2;
-	      } else {
-	        sign = -sign;
-	        swap = -x1;
-	        x1 = -x2;
-	        x2 = swap;
-	        swap = -y1;
-	        y1 = -y2;
-	        y2 = swap;
-	      }
+
+	  function customChanged(d) {
+	    var dataLayer = layers.layer('data');
+
+	    if (d && d.url) {
+	      dataLayer.url(d.url);
+	    } else if (d && d.fileList) {
+	      dataLayer.fileList(d.fileList);
 	    }
 	  }
-	  if (x1 > 0.0) {
-	    if (x2 > 0.0) {
-	      if (x1 <= x2) ; else {
-	        return sign
-	      }
-	    } else {
-	      return sign
-	    }
-	  } else {
-	    if (x2 > 0.0) {
-	      return -sign
-	    } else {
-	      if (x1 >= x2) {
-	        sign = -sign;
-	        x1 = -x1;
-	        x2 = -x2;
-	      } else {
-	        return -sign
-	      }
-	    }
+
+	  function drawPanelItems(selection) {
+	    var panelsListEnter = selection.selectAll('.md-extras-list').data([0]).enter().append('ul').attr('class', 'layer-list md-extras-list');
+	    var historyPanelLabelEnter = panelsListEnter.append('li').attr('class', 'history-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('map_data.history_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.history.key'))]).placement('top'));
+	    historyPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.ui().info.toggle('history');
+	    });
+	    historyPanelLabelEnter.append('span').call(_t.append('map_data.history_panel.title'));
+	    var measurementPanelLabelEnter = panelsListEnter.append('li').attr('class', 'measurement-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('map_data.measurement_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.measurement.key'))]).placement('top'));
+	    measurementPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.ui().info.toggle('measurement');
+	    });
+	    measurementPanelLabelEnter.append('span').call(_t.append('map_data.measurement_panel.title'));
 	  }
-	  while (true) {
-	    k = Math.floor(x2 / x1);
-	    x2 = x2 - k * x1;
-	    y2 = y2 - k * y1;
-	    if (y2 < 0.0) {
-	      return -sign
-	    }
-	    if (y2 > y1) {
-	      return sign
-	    }
-	    if (x1 > x2 + x2) {
-	      if (y1 < y2 + y2) {
-	        return sign
-	      }
-	    } else {
-	      if (y1 > y2 + y2) {
-	        return -sign
-	      } else {
-	        x2 = x1 - x2;
-	        y2 = y1 - y2;
-	        sign = -sign;
-	      }
-	    }
-	    if (y2 === 0.0) {
-	      if (x2 === 0.0) {
-	        return 0
-	      } else {
-	        return -sign
-	      }
-	    }
-	    if (x2 === 0.0) {
-	      return sign
-	    }
-	    k = Math.floor(x1 / x2);
-	    x1 = x1 - k * x2;
-	    y1 = y1 - k * y2;
-	    if (y1 < 0.0) {
-	      return sign
-	    }
-	    if (y1 > y2) {
-	      return -sign
-	    }
-	    if (x2 > x1 + x1) {
-	      if (y2 < y1 + y1) {
-	        return -sign
-	      }
-	    } else {
-	      if (y2 > y1 + y1) {
-	        return sign
-	      } else {
-	        x1 = x2 - x1;
-	        y1 = y2 - y1;
-	        sign = -sign;
-	      }
-	    }
-	    if (y1 === 0.0) {
-	      if (x1 === 0.0) {
-	        return 0
-	      } else {
-	        return sign
+
+	  context.layers().on('change.uiSectionDataLayers', section.reRender);
+	  context.map().on('move.uiSectionDataLayers', debounce(function () {
+	    // Detroit layers may have moved in or out of view
+	    window.requestIdleCallback(section.reRender);
+	  }, 1000));
+	  return section;
+	}
+
+	function uiSectionMapFeatures(context) {
+	  var _features = context.features().keys();
+
+	  var section = uiSection('map-features', context).label(_t.html('map_data.map_features')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.layer-feature-list-container').data([0]);
+	    var containerEnter = container.enter().append('div').attr('class', 'layer-feature-list-container');
+	    containerEnter.append('ul').attr('class', 'layer-list layer-feature-list');
+	    var footer = containerEnter.append('div').attr('class', 'feature-list-links section-footer');
+	    footer.append('a').attr('class', 'feature-list-link').attr('role', 'button').attr('href', '#').call(_t.append('issues.disable_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.features().disableAll();
+	    });
+	    footer.append('a').attr('class', 'feature-list-link').attr('role', 'button').attr('href', '#').call(_t.append('issues.enable_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.features().enableAll();
+	    }); // Update
+
+	    container = container.merge(containerEnter);
+	    container.selectAll('.layer-feature-list').call(drawListItems, _features, 'checkbox', 'feature', clickFeature, showsFeature);
+	  }
+
+	  function drawListItems(selection, data, type, name, change, active) {
+	    var items = selection.selectAll('li').data(data); // Exit
+
+	    items.exit().remove(); // Enter
+
+	    var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
+	      var tip = _t.html(name + '.' + d + '.tooltip');
+
+	      if (autoHiddenFeature(d)) {
+	        var msg = showsLayer('osm') ? _t.html('map_data.autohidden') : _t.html('map_data.osmhidden');
+	        tip += '<div>' + msg + '</div>';
 	      }
-	    }
-	    if (x1 === 0.0) {
-	      return -sign
-	    }
+
+	      return tip;
+	    }).placement('top'));
+	    var label = enter.append('label');
+	    label.append('input').attr('type', type).attr('name', name).on('change', change);
+	    label.append('span').html(function (d) {
+	      return _t.html(name + '.' + d + '.description');
+	    }); // Update
+
+	    items = items.merge(enter);
+	    items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', autoHiddenFeature);
 	  }
-	};
 
-	var RayCrossingCounter = function RayCrossingCounter () {
-	  this._p = null;
-	  this._crossingCount = 0;
-	  this._isPointOnSegment = false;
-	  var p = arguments[0];
-	  this._p = p;
-	};
-	RayCrossingCounter.prototype.countSegment = function countSegment (p1, p2) {
-	  if (p1.x < this._p.x && p2.x < this._p.x) { return null }
-	  if (this._p.x === p2.x && this._p.y === p2.y) {
-	    this._isPointOnSegment = true;
-	    return null
-	  }
-	  if (p1.y === this._p.y && p2.y === this._p.y) {
-	    var minx = p1.x;
-	    var maxx = p2.x;
-	    if (minx > maxx) {
-	      minx = p2.x;
-	      maxx = p1.x;
-	    }
-	    if (this._p.x >= minx && this._p.x <= maxx) {
-	      this._isPointOnSegment = true;
-	    }
-	    return null
-	  }
-	  if ((p1.y > this._p.y && p2.y <= this._p.y) || (p2.y > this._p.y && p1.y <= this._p.y)) {
-	    var x1 = p1.x - this._p.x;
-	    var y1 = p1.y - this._p.y;
-	    var x2 = p2.x - this._p.x;
-	    var y2 = p2.y - this._p.y;
-	    var xIntSign = RobustDeterminant.signOfDet2x2(x1, y1, x2, y2);
-	    if (xIntSign === 0.0) {
-	      this._isPointOnSegment = true;
-	      return null
-	    }
-	    if (y2 < y1) { xIntSign = -xIntSign; }
-	    if (xIntSign > 0.0) {
-	      this._crossingCount++;
-	    }
+	  function autoHiddenFeature(d) {
+	    return context.features().autoHidden(d);
 	  }
-	};
-	RayCrossingCounter.prototype.isPointInPolygon = function isPointInPolygon () {
-	  return this.getLocation() !== Location.EXTERIOR
-	};
-	RayCrossingCounter.prototype.getLocation = function getLocation () {
-	  if (this._isPointOnSegment) { return Location.BOUNDARY }
-	  if (this._crossingCount % 2 === 1) {
-	    return Location.INTERIOR
+
+	  function showsFeature(d) {
+	    return context.features().enabled(d);
 	  }
-	  return Location.EXTERIOR
-	};
-	RayCrossingCounter.prototype.isOnSegment = function isOnSegment () {
-	  return this._isPointOnSegment
-	};
-	RayCrossingCounter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	RayCrossingCounter.prototype.getClass = function getClass () {
-	  return RayCrossingCounter
-	};
-	RayCrossingCounter.locatePointInRing = function locatePointInRing () {
-	  if (arguments[0] instanceof Coordinate && hasInterface(arguments[1], CoordinateSequence)) {
-	    var p = arguments[0];
-	    var ring = arguments[1];
-	    var counter = new RayCrossingCounter(p);
-	    var p1 = new Coordinate();
-	    var p2 = new Coordinate();
-	    for (var i = 1; i < ring.size(); i++) {
-	      ring.getCoordinate(i, p1);
-	      ring.getCoordinate(i - 1, p2);
-	      counter.countSegment(p1, p2);
-	      if (counter.isOnSegment()) { return counter.getLocation() }
-	    }
-	    return counter.getLocation()
-	  } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Array) {
-	    var p$1 = arguments[0];
-	    var ring$1 = arguments[1];
-	    var counter$1 = new RayCrossingCounter(p$1);
-	    for (var i$1 = 1; i$1 < ring$1.length; i$1++) {
-	      var p1$1 = ring$1[i$1];
-	      var p2$1 = ring$1[i$1 - 1];
-	      counter$1.countSegment(p1$1, p2$1);
-	      if (counter$1.isOnSegment()) { return counter$1.getLocation() }
-	    }
-	    return counter$1.getLocation()
+
+	  function clickFeature(d3_event, d) {
+	    context.features().toggle(d);
 	  }
-	};
 
-	var CGAlgorithms = function CGAlgorithms () {};
+	  function showsLayer(id) {
+	    var layer = context.layers().layer(id);
+	    return layer && layer.enabled();
+	  } // add listeners
 
-	var staticAccessors$3 = { CLOCKWISE: { configurable: true },RIGHT: { configurable: true },COUNTERCLOCKWISE: { configurable: true },LEFT: { configurable: true },COLLINEAR: { configurable: true },STRAIGHT: { configurable: true } };
 
-	CGAlgorithms.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CGAlgorithms.prototype.getClass = function getClass () {
-	  return CGAlgorithms
-	};
-	CGAlgorithms.orientationIndex = function orientationIndex (p1, p2, q) {
-	  return CGAlgorithmsDD.orientationIndex(p1, p2, q)
-	};
-	CGAlgorithms.signedArea = function signedArea () {
-	  if (arguments[0] instanceof Array) {
-	    var ring = arguments[0];
-	    if (ring.length < 3) { return 0.0 }
-	    var sum = 0.0;
-	    var x0 = ring[0].x;
-	    for (var i = 1; i < ring.length - 1; i++) {
-	      var x = ring[i].x - x0;
-	      var y1 = ring[i + 1].y;
-	      var y2 = ring[i - 1].y;
-	      sum += x * (y2 - y1);
-	    }
-	    return sum / 2.0
-	  } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	    var ring$1 = arguments[0];
-	    var n = ring$1.size();
-	    if (n < 3) { return 0.0 }
-	    var p0 = new Coordinate();
-	    var p1 = new Coordinate();
-	    var p2 = new Coordinate();
-	    ring$1.getCoordinate(0, p1);
-	    ring$1.getCoordinate(1, p2);
-	    var x0$1 = p1.x;
-	    p2.x -= x0$1;
-	    var sum$1 = 0.0;
-	    for (var i$1 = 1; i$1 < n - 1; i$1++) {
-	      p0.y = p1.y;
-	      p1.x = p2.x;
-	      p1.y = p2.y;
-	      ring$1.getCoordinate(i$1 + 1, p2);
-	      p2.x -= x0$1;
-	      sum$1 += p1.x * (p0.y - p2.y);
-	    }
-	    return sum$1 / 2.0
+	  context.features().on('change.map_features', section.reRender);
+	  return section;
+	}
+
+	function uiSectionMapStyleOptions(context) {
+	  var section = uiSection('fill-area', context).label(_t.html('map_data.style_options')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.layer-fill-list').data([0]);
+	    container.enter().append('ul').attr('class', 'layer-list layer-fill-list').merge(container).call(drawListItems, context.map().areaFillOptions, 'radio', 'area_fill', setFill, isActiveFill);
+	    var container2 = selection.selectAll('.layer-visual-diff-list').data([0]);
+	    container2.enter().append('ul').attr('class', 'layer-list layer-visual-diff-list').merge(container2).call(drawListItems, ['highlight_edits'], 'checkbox', 'visual_diff', toggleHighlightEdited, function () {
+	      return context.surface().classed('highlight-edited');
+	    });
 	  }
-	};
-	CGAlgorithms.distanceLineLine = function distanceLineLine (A, B, C, D) {
-	  if (A.equals(B)) { return CGAlgorithms.distancePointLine(A, C, D) }
-	  if (C.equals(D)) { return CGAlgorithms.distancePointLine(D, A, B) }
-	  var noIntersection = false;
-	  if (!Envelope.intersects(A, B, C, D)) {
-	    noIntersection = true;
-	  } else {
-	    var denom = (B.x - A.x) * (D.y - C.y) - (B.y - A.y) * (D.x - C.x);
-	    if (denom === 0) {
-	      noIntersection = true;
-	    } else {
-	      var rNumb = (A.y - C.y) * (D.x - C.x) - (A.x - C.x) * (D.y - C.y);
-	      var sNum = (A.y - C.y) * (B.x - A.x) - (A.x - C.x) * (B.y - A.y);
-	      var s = sNum / denom;
-	      var r = rNumb / denom;
-	      if (r < 0 || r > 1 || s < 0 || s > 1) {
-	        noIntersection = true;
-	      }
-	    }
+
+	  function drawListItems(selection, data, type, name, change, active) {
+	    var items = selection.selectAll('li').data(data); // Exit
+
+	    items.exit().remove(); // Enter
+
+	    var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
+	      return _t.html(name + '.' + d + '.tooltip');
+	    }).keys(function (d) {
+	      var key = d === 'wireframe' ? _t('area_fill.wireframe.key') : null;
+	      if (d === 'highlight_edits') key = _t('map_data.highlight_edits.key');
+	      return key ? [key] : null;
+	    }).placement('top'));
+	    var label = enter.append('label');
+	    label.append('input').attr('type', type).attr('name', name).on('change', change);
+	    label.append('span').html(function (d) {
+	      return _t.html(name + '.' + d + '.description');
+	    }); // Update
+
+	    items = items.merge(enter);
+	    items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false);
 	  }
-	  if (noIntersection) {
-	    return MathUtil.min(CGAlgorithms.distancePointLine(A, C, D), CGAlgorithms.distancePointLine(B, C, D), CGAlgorithms.distancePointLine(C, A, B), CGAlgorithms.distancePointLine(D, A, B))
+
+	  function isActiveFill(d) {
+	    return context.map().activeAreaFill() === d;
 	  }
-	  return 0.0
-	};
-	CGAlgorithms.isPointInRing = function isPointInRing (p, ring) {
-	  return CGAlgorithms.locatePointInRing(p, ring) !== Location.EXTERIOR
-	};
-	CGAlgorithms.computeLength = function computeLength (pts) {
-	  var n = pts.size();
-	  if (n <= 1) { return 0.0 }
-	  var len = 0.0;
-	  var p = new Coordinate();
-	  pts.getCoordinate(0, p);
-	  var x0 = p.x;
-	  var y0 = p.y;
-	  for (var i = 1; i < n; i++) {
-	    pts.getCoordinate(i, p);
-	    var x1 = p.x;
-	    var y1 = p.y;
-	    var dx = x1 - x0;
-	    var dy = y1 - y0;
-	    len += Math.sqrt(dx * dx + dy * dy);
-	    x0 = x1;
-	    y0 = y1;
-	  }
-	  return len
-	};
-	CGAlgorithms.isCCW = function isCCW (ring) {
-	  var nPts = ring.length - 1;
-	  if (nPts < 3) { throw new IllegalArgumentException('Ring has fewer than 4 points, so orientation cannot be determined') }
-	  var hiPt = ring[0];
-	  var hiIndex = 0;
-	  for (var i = 1; i <= nPts; i++) {
-	    var p = ring[i];
-	    if (p.y > hiPt.y) {
-	      hiPt = p;
-	      hiIndex = i;
-	    }
-	  }
-	  var iPrev = hiIndex;
-	  do {
-	    iPrev = iPrev - 1;
-	    if (iPrev < 0) { iPrev = nPts; }
-	  } while (ring[iPrev].equals2D(hiPt) && iPrev !== hiIndex)
-	  var iNext = hiIndex;
-	  do {
-	    iNext = (iNext + 1) % nPts;
-	  } while (ring[iNext].equals2D(hiPt) && iNext !== hiIndex)
-	  var prev = ring[iPrev];
-	  var next = ring[iNext];
-	  if (prev.equals2D(hiPt) || next.equals2D(hiPt) || prev.equals2D(next)) { return false }
-	  var disc = CGAlgorithms.computeOrientation(prev, hiPt, next);
-	  var isCCW = false;
-	  if (disc === 0) {
-	    isCCW = prev.x > next.x;
-	  } else {
-	    isCCW = disc > 0;
+
+	  function toggleHighlightEdited(d3_event) {
+	    d3_event.preventDefault();
+	    context.map().toggleHighlightEdited();
 	  }
-	  return isCCW
-	};
-	CGAlgorithms.locatePointInRing = function locatePointInRing (p, ring) {
-	  return RayCrossingCounter.locatePointInRing(p, ring)
-	};
-	CGAlgorithms.distancePointLinePerpendicular = function distancePointLinePerpendicular (p, A, B) {
-	  var len2 = (B.x - A.x) * (B.x - A.x) + (B.y - A.y) * (B.y - A.y);
-	  var s = ((A.y - p.y) * (B.x - A.x) - (A.x - p.x) * (B.y - A.y)) / len2;
-	  return Math.abs(s) * Math.sqrt(len2)
-	};
-	CGAlgorithms.computeOrientation = function computeOrientation (p1, p2, q) {
-	  return CGAlgorithms.orientationIndex(p1, p2, q)
-	};
-	CGAlgorithms.distancePointLine = function distancePointLine () {
-	  if (arguments.length === 2) {
-	    var p = arguments[0];
-	    var line = arguments[1];
-	    if (line.length === 0) { throw new IllegalArgumentException('Line array must contain at least one vertex') }
-	    var minDistance = p.distance(line[0]);
-	    for (var i = 0; i < line.length - 1; i++) {
-	      var dist = CGAlgorithms.distancePointLine(p, line[i], line[i + 1]);
-	      if (dist < minDistance) {
-	        minDistance = dist;
-	      }
-	    }
-	    return minDistance
-	  } else if (arguments.length === 3) {
-	    var p$1 = arguments[0];
-	    var A = arguments[1];
-	    var B = arguments[2];
-	    if (A.x === B.x && A.y === B.y) { return p$1.distance(A) }
-	    var len2 = (B.x - A.x) * (B.x - A.x) + (B.y - A.y) * (B.y - A.y);
-	    var r = ((p$1.x - A.x) * (B.x - A.x) + (p$1.y - A.y) * (B.y - A.y)) / len2;
-	    if (r <= 0.0) { return p$1.distance(A) }
-	    if (r >= 1.0) { return p$1.distance(B) }
-	    var s = ((A.y - p$1.y) * (B.x - A.x) - (A.x - p$1.x) * (B.y - A.y)) / len2;
-	    return Math.abs(s) * Math.sqrt(len2)
+
+	  function setFill(d3_event, d) {
+	    context.map().activeAreaFill(d);
 	  }
-	};
-	CGAlgorithms.isOnLine = function isOnLine (p, pt) {
-	  var lineIntersector = new RobustLineIntersector();
-	  for (var i = 1; i < pt.length; i++) {
-	    var p0 = pt[i - 1];
-	    var p1 = pt[i];
-	    lineIntersector.computeIntersection(p, p0, p1);
-	    if (lineIntersector.hasIntersection()) {
-	      return true
-	    }
+
+	  context.map().on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
+	  return section;
+	}
+
+	function uiSectionPhotoOverlays(context) {
+	  var layers = context.layers();
+	  var section = uiSection('photo-overlays', context).label(_t.html('photo_overlays.title')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.photo-overlay-container').data([0]);
+	    container.enter().append('div').attr('class', 'photo-overlay-container').merge(container).call(drawPhotoItems).call(drawPhotoTypeItems).call(drawDateFilter).call(drawUsernameFilter);
 	  }
-	  return false
-	};
-	staticAccessors$3.CLOCKWISE.get = function () { return -1 };
-	staticAccessors$3.RIGHT.get = function () { return CGAlgorithms.CLOCKWISE };
-	staticAccessors$3.COUNTERCLOCKWISE.get = function () { return 1 };
-	staticAccessors$3.LEFT.get = function () { return CGAlgorithms.COUNTERCLOCKWISE };
-	staticAccessors$3.COLLINEAR.get = function () { return 0 };
-	staticAccessors$3.STRAIGHT.get = function () { return CGAlgorithms.COLLINEAR };
 
-	Object.defineProperties( CGAlgorithms, staticAccessors$3 );
+	  function drawPhotoItems(selection) {
+	    var photoKeys = context.photos().overlayLayerIDs();
+	    var photoLayers = layers.all().filter(function (obj) {
+	      return photoKeys.indexOf(obj.id) !== -1;
+	    });
+	    var data = photoLayers.filter(function (obj) {
+	      return obj.layer.supported();
+	    });
 
-	var GeometryComponentFilter = function GeometryComponentFilter () {};
+	    function layerSupported(d) {
+	      return d.layer && d.layer.supported();
+	    }
 
-	GeometryComponentFilter.prototype.filter = function filter (geom) {};
-	GeometryComponentFilter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryComponentFilter.prototype.getClass = function getClass () {
-	  return GeometryComponentFilter
-	};
+	    function layerEnabled(d) {
+	      return layerSupported(d) && d.layer.enabled();
+	    }
 
-	var Geometry = function Geometry () {
-	  var factory = arguments[0];
+	    var ul = selection.selectAll('.layer-list-photos').data([0]);
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-photos').merge(ul);
+	    var li = ul.selectAll('.list-item-photos').data(data);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', function (d) {
+	      var classes = 'list-item-photos list-item-' + d.id;
 
-	  this._envelope = null;
-	  this._factory = null;
-	  this._SRID = null;
-	  this._userData = null;
-	  this._factory = factory;
-	  this._SRID = factory.getSRID();
-	};
+	      if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
+	        classes += ' indented';
+	      }
 
-	var staticAccessors$11 = { serialVersionUID: { configurable: true },SORTINDEX_POINT: { configurable: true },SORTINDEX_MULTIPOINT: { configurable: true },SORTINDEX_LINESTRING: { configurable: true },SORTINDEX_LINEARRING: { configurable: true },SORTINDEX_MULTILINESTRING: { configurable: true },SORTINDEX_POLYGON: { configurable: true },SORTINDEX_MULTIPOLYGON: { configurable: true },SORTINDEX_GEOMETRYCOLLECTION: { configurable: true },geometryChangedFilter: { configurable: true } };
-	Geometry.prototype.isGeometryCollection = function isGeometryCollection () {
-	  return this.getSortIndex() === Geometry.SORTINDEX_GEOMETRYCOLLECTION
-	};
-	Geometry.prototype.getFactory = function getFactory () {
-	  return this._factory
-	};
-	Geometry.prototype.getGeometryN = function getGeometryN (n) {
-	  return this
-	};
-	Geometry.prototype.getArea = function getArea () {
-	  return 0.0
-	};
-	Geometry.prototype.isRectangle = function isRectangle () {
-	  return false
-	};
-	Geometry.prototype.equals = function equals () {
-	  if (arguments[0] instanceof Geometry) {
-	    var g$1 = arguments[0];
-	    if (g$1 === null) { return false }
-	    return this.equalsTopo(g$1)
-	  } else if (arguments[0] instanceof Object) {
-	    var o = arguments[0];
-	    if (!(o instanceof Geometry)) { return false }
-	    var g = o;
-	    return this.equalsExact(g)
+	      return classes;
+	    });
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      var titleID;
+	      if (d.id === 'mapillary-signs') titleID = 'mapillary.signs.tooltip';else if (d.id === 'mapillary') titleID = 'mapillary_images.tooltip';else if (d.id === 'kartaview') titleID = 'kartaview_images.tooltip';else titleID = d.id.replace(/-/g, '_') + '.tooltip';
+	      select(this).call(uiTooltip().title(_t.html(titleID)).placement('top'));
+	    });
+	    labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+	      toggleLayer(d.id);
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      var id = d.id;
+	      if (id === 'mapillary-signs') id = 'photo_overlays.traffic_signs';
+	      return _t.html(id.replace(/-/g, '_') + '.title');
+	    }); // Update
+
+	    li.merge(liEnter).classed('active', layerEnabled).selectAll('input').property('checked', layerEnabled);
 	  }
-	};
-	Geometry.prototype.equalsExact = function equalsExact (other) {
-	  return this === other || this.equalsExact(other, 0)
-	};
-	Geometry.prototype.geometryChanged = function geometryChanged () {
-	  this.apply(Geometry.geometryChangedFilter);
-	};
-	Geometry.prototype.geometryChangedAction = function geometryChangedAction () {
-	  this._envelope = null;
-	};
-	Geometry.prototype.equalsNorm = function equalsNorm (g) {
-	  if (g === null) { return false }
-	  return this.norm().equalsExact(g.norm())
-	};
-	Geometry.prototype.getLength = function getLength () {
-	  return 0.0
-	};
-	Geometry.prototype.getNumGeometries = function getNumGeometries () {
-	  return 1
-	};
-	Geometry.prototype.compareTo = function compareTo () {
-	  if (arguments.length === 1) {
-	    var o = arguments[0];
-	    var other = o;
-	    if (this.getSortIndex() !== other.getSortIndex()) {
-	      return this.getSortIndex() - other.getSortIndex()
-	    }
-	    if (this.isEmpty() && other.isEmpty()) {
-	      return 0
-	    }
-	    if (this.isEmpty()) {
-	      return -1
-	    }
-	    if (other.isEmpty()) {
-	      return 1
-	    }
-	    return this.compareToSameClass(o)
-	  } else if (arguments.length === 2) {
-	    var other$1 = arguments[0];
-	    var comp = arguments[1];
-	    if (this.getSortIndex() !== other$1.getSortIndex()) {
-	      return this.getSortIndex() - other$1.getSortIndex()
+
+	  function drawPhotoTypeItems(selection) {
+	    var data = context.photos().allPhotoTypes();
+
+	    function typeEnabled(d) {
+	      return context.photos().showsPhotoType(d);
 	    }
-	    if (this.isEmpty() && other$1.isEmpty()) {
-	      return 0
+
+	    var ul = selection.selectAll('.layer-list-photo-types').data([0]);
+	    ul.exit().remove();
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-photo-types').merge(ul);
+	    var li = ul.selectAll('.list-item-photo-types').data(context.photos().shouldFilterByPhotoType() ? data : []);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', function (d) {
+	      return 'list-item-photo-types list-item-' + d;
+	    });
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      select(this).call(uiTooltip().title(_t.html('photo_overlays.photo_type.' + d + '.tooltip')).placement('top'));
+	    });
+	    labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+	      context.photos().togglePhotoType(d);
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      return _t.html('photo_overlays.photo_type.' + d + '.title');
+	    }); // Update
+
+	    li.merge(liEnter).classed('active', typeEnabled).selectAll('input').property('checked', typeEnabled);
+	  }
+
+	  function drawDateFilter(selection) {
+	    var data = context.photos().dateFilters();
+
+	    function filterEnabled(d) {
+	      return context.photos().dateFilterValue(d);
 	    }
-	    if (this.isEmpty()) {
-	      return -1
+
+	    var ul = selection.selectAll('.layer-list-date-filter').data([0]);
+	    ul.exit().remove();
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-date-filter').merge(ul);
+	    var li = ul.selectAll('.list-item-date-filter').data(context.photos().shouldFilterByDate() ? data : []);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', 'list-item-date-filter');
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      select(this).call(uiTooltip().title(_t.html('photo_overlays.date_filter.' + d + '.tooltip')).placement('top'));
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      return _t.html('photo_overlays.date_filter.' + d + '.title');
+	    });
+	    labelEnter.append('input').attr('type', 'date').attr('class', 'list-item-input').attr('placeholder', _t('units.year_month_day')).call(utilNoAuto).each(function (d) {
+	      utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
+	    }).on('change', function (d3_event, d) {
+	      var value = utilGetSetValue(select(this)).trim();
+	      context.photos().setDateFilter(d, value, true); // reload the displayed dates
+
+	      li.selectAll('input').each(function (d) {
+	        utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
+	      });
+	    });
+	    li = li.merge(liEnter).classed('active', filterEnabled);
+	  }
+
+	  function drawUsernameFilter(selection) {
+	    function filterEnabled() {
+	      return context.photos().usernames();
 	    }
-	    if (other$1.isEmpty()) {
-	      return 1
+
+	    var ul = selection.selectAll('.layer-list-username-filter').data([0]);
+	    ul.exit().remove();
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-username-filter').merge(ul);
+	    var li = ul.selectAll('.list-item-username-filter').data(context.photos().shouldFilterByUsername() ? ['username-filter'] : []);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', 'list-item-username-filter');
+	    var labelEnter = liEnter.append('label').each(function () {
+	      select(this).call(uiTooltip().title(_t.html('photo_overlays.username_filter.tooltip')).placement('top'));
+	    });
+	    labelEnter.append('span').call(_t.append('photo_overlays.username_filter.title'));
+	    labelEnter.append('input').attr('type', 'text').attr('class', 'list-item-input').call(utilNoAuto).property('value', usernameValue).on('change', function () {
+	      var value = select(this).property('value');
+	      context.photos().setUsernameFilter(value, true);
+	      select(this).property('value', usernameValue);
+	    });
+	    li.merge(liEnter).classed('active', filterEnabled);
+
+	    function usernameValue() {
+	      var usernames = context.photos().usernames();
+	      if (usernames) return usernames.join('; ');
+	      return usernames;
 	    }
-	    return this.compareToSameClass(other$1, comp)
-	  }
-	};
-	Geometry.prototype.getUserData = function getUserData () {
-	  return this._userData
-	};
-	Geometry.prototype.getSRID = function getSRID () {
-	  return this._SRID
-	};
-	Geometry.prototype.getEnvelope = function getEnvelope () {
-	  return this.getFactory().toGeometry(this.getEnvelopeInternal())
-	};
-	Geometry.prototype.checkNotGeometryCollection = function checkNotGeometryCollection (g) {
-	  if (g.getSortIndex() === Geometry.SORTINDEX_GEOMETRYCOLLECTION) {
-	    throw new IllegalArgumentException('This method does not support GeometryCollection arguments')
-	  }
-	};
-	Geometry.prototype.equal = function equal (a, b, tolerance) {
-	  if (tolerance === 0) {
-	    return a.equals(b)
 	  }
-	  return a.distance(b) <= tolerance
-	};
-	Geometry.prototype.norm = function norm () {
-	  var copy = this.copy();
-	  copy.normalize();
-	  return copy
-	};
-	Geometry.prototype.getPrecisionModel = function getPrecisionModel () {
-	  return this._factory.getPrecisionModel()
-	};
-	Geometry.prototype.getEnvelopeInternal = function getEnvelopeInternal () {
-	  if (this._envelope === null) {
-	    this._envelope = this.computeEnvelopeInternal();
+
+	  function toggleLayer(which) {
+	    setLayer(which, !showsLayer(which));
 	  }
-	  return new Envelope(this._envelope)
-	};
-	Geometry.prototype.setSRID = function setSRID (SRID) {
-	  this._SRID = SRID;
-	};
-	Geometry.prototype.setUserData = function setUserData (userData) {
-	  this._userData = userData;
-	};
-	Geometry.prototype.compare = function compare (a, b) {
-	  var i = a.iterator();
-	  var j = b.iterator();
-	  while (i.hasNext() && j.hasNext()) {
-	    var aElement = i.next();
-	    var bElement = j.next();
-	    var comparison = aElement.compareTo(bElement);
-	    if (comparison !== 0) {
-	      return comparison
+
+	  function showsLayer(which) {
+	    var layer = layers.layer(which);
+
+	    if (layer) {
+	      return layer.enabled();
 	    }
+
+	    return false;
 	  }
-	  if (i.hasNext()) {
-	    return 1
-	  }
-	  if (j.hasNext()) {
-	    return -1
-	  }
-	  return 0
-	};
-	Geometry.prototype.hashCode = function hashCode () {
-	  return this.getEnvelopeInternal().hashCode()
-	};
-	Geometry.prototype.isGeometryCollectionOrDerived = function isGeometryCollectionOrDerived () {
-	  if (this.getSortIndex() === Geometry.SORTINDEX_GEOMETRYCOLLECTION || this.getSortIndex() === Geometry.SORTINDEX_MULTIPOINT || this.getSortIndex() === Geometry.SORTINDEX_MULTILINESTRING || this.getSortIndex() === Geometry.SORTINDEX_MULTIPOLYGON) {
-	    return true
-	  }
-	  return false
-	};
-	Geometry.prototype.interfaces_ = function interfaces_ () {
-	  return [Clonable, Comparable, Serializable]
-	};
-	Geometry.prototype.getClass = function getClass () {
-	  return Geometry
-	};
-	Geometry.hasNonEmptyElements = function hasNonEmptyElements (geometries) {
-	  for (var i = 0; i < geometries.length; i++) {
-	    if (!geometries[i].isEmpty()) {
-	      return true
+
+	  function setLayer(which, enabled) {
+	    var layer = layers.layer(which);
+
+	    if (layer) {
+	      layer.enabled(enabled);
 	    }
 	  }
-	  return false
-	};
-	Geometry.hasNullElements = function hasNullElements (array) {
-	  for (var i = 0; i < array.length; i++) {
-	    if (array[i] === null) {
-	      return true
+
+	  context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
+	  context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
+	  return section;
+	}
+
+	function uiPaneMapData(context) {
+	  var mapDataPane = uiPane('map-data', context).key(_t('map_data.key')).label(_t.html('map_data.title')).description(_t.html('map_data.description')).iconName('iD-icon-data').sections([uiSectionDataLayers(context), uiSectionPhotoOverlays(context), uiSectionMapStyleOptions(context), uiSectionMapFeatures(context)]);
+	  return mapDataPane;
+	}
+
+	function uiPanePreferences(context) {
+	  var preferencesPane = uiPane('preferences', context).key(_t('preferences.key')).label(_t.html('preferences.title')).description(_t.html('preferences.description')).iconName('fas-user-cog').sections([uiSectionPrivacy(context)]);
+	  return preferencesPane;
+	}
+
+	function uiInit(context) {
+	  var _initCounter = 0;
+	  var _needWidth = {};
+
+	  var _lastPointerType;
+
+	  function render(container) {
+	    container.on('click.ui', function (d3_event) {
+	      // we're only concerned with the primary mouse button
+	      if (d3_event.button !== 0) return;
+	      if (!d3_event.composedPath) return; // some targets have default click events we don't want to override
+
+	      var isOkayTarget = d3_event.composedPath().some(function (node) {
+	        // we only care about element nodes
+	        return node.nodeType === 1 && ( // clicking <input> focuses it and/or changes a value
+	        node.nodeName === 'INPUT' || // clicking <label> affects its <input> by default
+	        node.nodeName === 'LABEL' || // clicking <a> opens a hyperlink by default
+	        node.nodeName === 'A');
+	      });
+	      if (isOkayTarget) return; // disable double-tap-to-zoom on touchscreens
+
+	      d3_event.preventDefault();
+	    });
+	    var detected = utilDetect(); // only WebKit supports gesture events
+
+	    if ('GestureEvent' in window && // Listening for gesture events on iOS 13.4+ breaks double-tapping,
+	    // but we only need to do this on desktop Safari anyway. – #7694
+	    !detected.isMobileWebKit) {
+	      // On iOS we disable pinch-to-zoom of the UI via the `touch-action`
+	      // CSS property, but on desktop Safari we need to manually cancel the
+	      // default gesture events.
+	      container.on('gesturestart.ui gesturechange.ui gestureend.ui', function (d3_event) {
+	        // disable pinch-to-zoom of the UI via multitouch trackpads on macOS Safari
+	        d3_event.preventDefault();
+	      });
 	    }
-	  }
-	  return false
-	};
-	staticAccessors$11.serialVersionUID.get = function () { return 8763622679187376702 };
-	staticAccessors$11.SORTINDEX_POINT.get = function () { return 0 };
-	staticAccessors$11.SORTINDEX_MULTIPOINT.get = function () { return 1 };
-	staticAccessors$11.SORTINDEX_LINESTRING.get = function () { return 2 };
-	staticAccessors$11.SORTINDEX_LINEARRING.get = function () { return 3 };
-	staticAccessors$11.SORTINDEX_MULTILINESTRING.get = function () { return 4 };
-	staticAccessors$11.SORTINDEX_POLYGON.get = function () { return 5 };
-	staticAccessors$11.SORTINDEX_MULTIPOLYGON.get = function () { return 6 };
-	staticAccessors$11.SORTINDEX_GEOMETRYCOLLECTION.get = function () { return 7 };
-	staticAccessors$11.geometryChangedFilter.get = function () { return geometryChangedFilter };
-
-	Object.defineProperties( Geometry, staticAccessors$11 );
-
-	var geometryChangedFilter = function geometryChangedFilter () {};
-
-	geometryChangedFilter.interfaces_ = function interfaces_ () {
-	  return [GeometryComponentFilter]
-	};
-	geometryChangedFilter.filter = function filter (geom) {
-	  geom.geometryChangedAction();
-	};
 
-	var CoordinateFilter = function CoordinateFilter () {};
+	    if ('PointerEvent' in window) {
+	      select(window).on('pointerdown.ui pointerup.ui', function (d3_event) {
+	        var pointerType = d3_event.pointerType || 'mouse';
 
-	CoordinateFilter.prototype.filter = function filter (coord) {};
-	CoordinateFilter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateFilter.prototype.getClass = function getClass () {
-	  return CoordinateFilter
-	};
+	        if (_lastPointerType !== pointerType) {
+	          _lastPointerType = pointerType;
+	          container.attr('pointer', pointerType);
+	        }
+	      }, true);
+	    } else {
+	      _lastPointerType = 'mouse';
+	      container.attr('pointer', 'mouse');
+	    }
 
-	var BoundaryNodeRule = function BoundaryNodeRule () {};
+	    container.attr('lang', _mainLocalizer.localeCode()).attr('dir', _mainLocalizer.textDirection()); // setup fullscreen keybindings (no button shown at this time)
 
-	var staticAccessors$12 = { Mod2BoundaryNodeRule: { configurable: true },EndPointBoundaryNodeRule: { configurable: true },MultiValentEndPointBoundaryNodeRule: { configurable: true },MonoValentEndPointBoundaryNodeRule: { configurable: true },MOD2_BOUNDARY_RULE: { configurable: true },ENDPOINT_BOUNDARY_RULE: { configurable: true },MULTIVALENT_ENDPOINT_BOUNDARY_RULE: { configurable: true },MONOVALENT_ENDPOINT_BOUNDARY_RULE: { configurable: true },OGC_SFS_BOUNDARY_RULE: { configurable: true } };
+	    container.call(uiFullScreen(context));
+	    var map = context.map();
+	    map.redrawEnable(false); // don't draw until we've set zoom/lat/long
 
-	BoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {};
-	BoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BoundaryNodeRule.prototype.getClass = function getClass () {
-	  return BoundaryNodeRule
-	};
-	staticAccessors$12.Mod2BoundaryNodeRule.get = function () { return Mod2BoundaryNodeRule };
-	staticAccessors$12.EndPointBoundaryNodeRule.get = function () { return EndPointBoundaryNodeRule };
-	staticAccessors$12.MultiValentEndPointBoundaryNodeRule.get = function () { return MultiValentEndPointBoundaryNodeRule };
-	staticAccessors$12.MonoValentEndPointBoundaryNodeRule.get = function () { return MonoValentEndPointBoundaryNodeRule };
-	staticAccessors$12.MOD2_BOUNDARY_RULE.get = function () { return new Mod2BoundaryNodeRule() };
-	staticAccessors$12.ENDPOINT_BOUNDARY_RULE.get = function () { return new EndPointBoundaryNodeRule() };
-	staticAccessors$12.MULTIVALENT_ENDPOINT_BOUNDARY_RULE.get = function () { return new MultiValentEndPointBoundaryNodeRule() };
-	staticAccessors$12.MONOVALENT_ENDPOINT_BOUNDARY_RULE.get = function () { return new MonoValentEndPointBoundaryNodeRule() };
-	staticAccessors$12.OGC_SFS_BOUNDARY_RULE.get = function () { return BoundaryNodeRule.MOD2_BOUNDARY_RULE };
-
-	Object.defineProperties( BoundaryNodeRule, staticAccessors$12 );
-
-	var Mod2BoundaryNodeRule = function Mod2BoundaryNodeRule () {};
-
-	Mod2BoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-	  return boundaryCount % 2 === 1
-	};
-	Mod2BoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return [BoundaryNodeRule]
-	};
-	Mod2BoundaryNodeRule.prototype.getClass = function getClass () {
-	  return Mod2BoundaryNodeRule
-	};
+	    map.on('hitMinZoom.ui', function () {
+	      ui.flash.iconName('#iD-icon-no').label(_t.html('cannot_zoom'))();
+	    });
+	    container.append('svg').attr('id', 'ideditor-defs').call(ui.svgDefs);
+	    container.append('div').attr('class', 'sidebar').call(ui.sidebar);
+	    var content = container.append('div').attr('class', 'main-content active'); // Top toolbar
+
+	    content.append('div').attr('class', 'top-toolbar-wrap').append('div').attr('class', 'top-toolbar fillD').call(uiTopToolbar(context));
+	    content.append('div').attr('class', 'main-map').attr('dir', 'ltr').call(map);
+	    var overMap = content.append('div').attr('class', 'over-map'); // HACK: Mobile Safari 14 likes to select anything selectable when long-
+	    // pressing, even if it's not targeted. This conflicts with long-pressing
+	    // to show the edit menu. We add a selectable offscreen element as the first
+	    // child to trick Safari into not showing the selection UI.
+
+	    overMap.append('div').attr('class', 'select-trap').text('t');
+	    overMap.call(uiMapInMap(context)).call(uiNotice(context));
+	    overMap.append('div').attr('class', 'spinner').call(uiSpinner(context)); // Map controls
+
+	    var controlsWrap = overMap.append('div').attr('class', 'map-controls-wrap');
+	    var controls = controlsWrap.append('div').attr('class', 'map-controls');
+	    controls.append('div').attr('class', 'map-control zoombuttons').call(uiZoom(context));
+	    controls.append('div').attr('class', 'map-control zoom-to-selection-control').call(uiZoomToSelection(context));
+	    controls.append('div').attr('class', 'map-control geolocate-control').call(uiGeolocate(context));
+	    controlsWrap.on('wheel.mapControls', function (d3_event) {
+	      if (!d3_event.deltaX) {
+	        controlsWrap.node().scrollTop += d3_event.deltaY;
+	      }
+	    }); // Add panes
+	    // This should happen after map is initialized, as some require surface()
+
+	    var panes = overMap.append('div').attr('class', 'map-panes');
+	    var uiPanes = [uiPaneBackground(context), uiPaneMapData(context), uiPaneIssues(context), uiPanePreferences(context), uiPaneHelp(context)];
+	    uiPanes.forEach(function (pane) {
+	      controls.append('div').attr('class', 'map-control map-pane-control ' + pane.id + '-control').call(pane.renderToggleButton);
+	      panes.call(pane.renderPane);
+	    });
+	    ui.info = uiInfo(context);
+	    overMap.call(ui.info);
+	    overMap.append('div').attr('class', 'photoviewer').classed('al', true) // 'al'=left,  'ar'=right
+	    .classed('hide', true).call(ui.photoviewer);
+	    overMap.append('div').attr('class', 'attribution-wrap').attr('dir', 'ltr').call(uiAttribution(context)); // Add footer
 
-	var EndPointBoundaryNodeRule = function EndPointBoundaryNodeRule () {};
+	    var about = content.append('div').attr('class', 'map-footer');
+	    about.append('div').attr('class', 'api-status').call(uiStatus(context));
+	    var footer = about.append('div').attr('class', 'map-footer-bar fillD');
+	    footer.append('div').attr('class', 'flash-wrap footer-hide');
+	    var footerWrap = footer.append('div').attr('class', 'main-footer-wrap footer-show');
+	    footerWrap.append('div').attr('class', 'scale-block').call(uiScale(context));
+	    var aboutList = footerWrap.append('div').attr('class', 'info-block').append('ul').attr('class', 'map-footer-list');
+	    aboutList.append('li').attr('class', 'user-list').call(uiContributors(context));
+	    var apiConnections = context.apiConnections();
 
-	EndPointBoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-	  return boundaryCount > 0
-	};
-	EndPointBoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return [BoundaryNodeRule]
-	};
-	EndPointBoundaryNodeRule.prototype.getClass = function getClass () {
-	  return EndPointBoundaryNodeRule
-	};
+	    if (apiConnections && apiConnections.length > 1) {
+	      aboutList.append('li').attr('class', 'source-switch').call(uiSourceSwitch(context).keys(apiConnections));
+	    }
+
+	    aboutList.append('li').attr('class', 'issues-info').call(uiIssuesInfo(context));
+	    aboutList.append('li').attr('class', 'feature-warning').call(uiFeatureInfo(context));
+	    var issueLinks = aboutList.append('li');
+	    issueLinks.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/issues').attr('aria-label', _t('report_a_bug')).call(svgIcon('#iD-icon-bug', 'light')).call(uiTooltip().title(_t.html('report_a_bug')).placement('top'));
+	    issueLinks.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/blob/develop/CONTRIBUTING.md#translating').attr('aria-label', _t('help_translate')).call(svgIcon('#iD-icon-translate', 'light')).call(uiTooltip().title(_t.html('help_translate')).placement('top'));
+	    aboutList.append('li').attr('class', 'version').call(uiVersion(context));
+
+	    if (!context.embed()) {
+	      aboutList.call(uiAccount(context));
+	    } // Setup map dimensions and move map to initial center/zoom.
+	    // This should happen after .main-content and toolbars exist.
+
+
+	    ui.onResize();
+	    map.redrawEnable(true);
+	    ui.hash = behaviorHash(context);
+	    ui.hash();
+
+	    if (!ui.hash.hadHash) {
+	      map.centerZoom([0, 0], 2);
+	    } // Bind events
+
+
+	    window.onbeforeunload = function () {
+	      return context.save();
+	    };
+
+	    window.onunload = function () {
+	      context.history().unlock();
+	    };
+
+	    select(window).on('resize.editor', function () {
+	      ui.onResize();
+	    });
+	    var panPixels = 80;
+	    context.keybinding().on('⌫', function (d3_event) {
+	      d3_event.preventDefault();
+	    }).on([_t('sidebar.key'), '`', '²', '@'], ui.sidebar.toggle) // #5663, #6864 - common QWERTY, AZERTY
+	    .on('←', pan([panPixels, 0])).on('↑', pan([0, panPixels])).on('→', pan([-panPixels, 0])).on('↓', pan([0, -panPixels])).on(uiCmd('⌥←'), pan([map.dimensions()[0], 0])).on(uiCmd('⌥↑'), pan([0, map.dimensions()[1]])).on(uiCmd('⌥→'), pan([-map.dimensions()[0], 0])).on(uiCmd('⌥↓'), pan([0, -map.dimensions()[1]])).on(uiCmd('⌘' + _t('background.key')), function quickSwitch(d3_event) {
+	      if (d3_event) {
+	        d3_event.stopImmediatePropagation();
+	        d3_event.preventDefault();
+	      }
 
-	var MultiValentEndPointBoundaryNodeRule = function MultiValentEndPointBoundaryNodeRule () {};
+	      var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));
 
-	MultiValentEndPointBoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-	  return boundaryCount > 1
-	};
-	MultiValentEndPointBoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return [BoundaryNodeRule]
-	};
-	MultiValentEndPointBoundaryNodeRule.prototype.getClass = function getClass () {
-	  return MultiValentEndPointBoundaryNodeRule
-	};
+	      if (previousBackground) {
+	        var currentBackground = context.background().baseLayerSource();
+	        corePreferences('background-last-used-toggle', currentBackground.id);
+	        corePreferences('background-last-used', previousBackground.id);
+	        context.background().baseLayerSource(previousBackground);
+	      }
+	    }).on(_t('area_fill.wireframe.key'), function toggleWireframe(d3_event) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      context.map().toggleWireframe();
+	    }).on(uiCmd('⌥' + _t('area_fill.wireframe.key')), function toggleOsmData(d3_event) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation(); // Don't allow layer changes while drawing - #6584
 
-	var MonoValentEndPointBoundaryNodeRule = function MonoValentEndPointBoundaryNodeRule () {};
+	      var mode = context.mode();
+	      if (mode && /^draw/.test(mode.id)) return;
+	      var layer = context.layers().layer('osm');
 
-	MonoValentEndPointBoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-	  return boundaryCount === 1
-	};
-	MonoValentEndPointBoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return [BoundaryNodeRule]
-	};
-	MonoValentEndPointBoundaryNodeRule.prototype.getClass = function getClass () {
-	  return MonoValentEndPointBoundaryNodeRule
-	};
+	      if (layer) {
+	        layer.enabled(!layer.enabled());
 
-	// import Iterator from './Iterator'
+	        if (!layer.enabled()) {
+	          context.enter(modeBrowse(context));
+	        }
+	      }
+	    }).on(_t('map_data.highlight_edits.key'), function toggleHighlightEdited(d3_event) {
+	      d3_event.preventDefault();
+	      context.map().toggleHighlightEdited();
+	    });
+	    context.on('enter.editor', function (entered) {
+	      container.classed('mode-' + entered.id, true);
+	    }).on('exit.editor', function (exited) {
+	      container.classed('mode-' + exited.id, false);
+	    });
+	    context.enter(modeBrowse(context));
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Collection.html
-	 *
-	 * @constructor
-	 * @private
-	 */
-	var Collection = function Collection () {};
+	    if (!_initCounter++) {
+	      if (!ui.hash.startWalkthrough) {
+	        context.container().call(uiSplash(context)).call(uiRestore(context));
+	      }
 
-	Collection.prototype.add = function add () {};
+	      context.container().call(ui.shortcuts);
+	    }
 
-	/**
-	 * Appends all of the elements in the specified collection to the end of this
-	 * list, in the order that they are returned by the specified collection's
-	 * iterator (optional operation).
-	 * @param {javascript.util.Collection} c
-	 * @return {boolean}
-	 */
-	Collection.prototype.addAll = function addAll () {};
+	    var osm = context.connection();
+	    var auth = uiLoading(context).message(_t.html('loading_auth')).blocking(true);
 
-	/**
-	 * Returns true if this collection contains no elements.
-	 * @return {boolean}
-	 */
-	Collection.prototype.isEmpty = function isEmpty () {};
+	    if (osm && auth) {
+	      osm.on('authLoading.ui', function () {
+	        context.container().call(auth);
+	      }).on('authDone.ui', function () {
+	        auth.close();
+	      });
+	    }
 
-	/**
-	 * Returns an iterator over the elements in this collection.
-	 * @return {javascript.util.Iterator}
-	 */
-	Collection.prototype.iterator = function iterator () {};
+	    _initCounter++;
 
-	/**
-	 * Returns an iterator over the elements in this collection.
-	 * @return {number}
-	 */
-	Collection.prototype.size = function size () {};
+	    if (ui.hash.startWalkthrough) {
+	      ui.hash.startWalkthrough = false;
+	      context.container().call(uiIntro(context));
+	    }
 
-	/**
-	 * Returns an array containing all of the elements in this collection.
-	 * @return {Array}
-	 */
-	Collection.prototype.toArray = function toArray () {};
+	    function pan(d) {
+	      return function (d3_event) {
+	        if (d3_event.shiftKey) return;
+	        if (context.container().select('.combobox').size()) return;
+	        d3_event.preventDefault();
+	        context.map().pan(d, 100);
+	      };
+	    }
+	  }
 
-	/**
-	 * Removes a single instance of the specified element from this collection if it
-	 * is present. (optional)
-	 * @param {Object} e
-	 * @return {boolean}
-	 */
-	Collection.prototype.remove = function remove () {};
+	  var ui = {};
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function IndexOutOfBoundsException (message) {
-	  this.message = message || '';
-	}
-	IndexOutOfBoundsException.prototype = new Error();
+	  var _loadPromise; // renders the iD interface into the container node
 
-	/**
-	 * @type {string}
-	 */
-	IndexOutOfBoundsException.prototype.name = 'IndexOutOfBoundsException';
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Iterator.html
-	 * @constructor
-	 * @private
-	 */
-	var Iterator$1 = function Iterator () {};
+	  ui.ensureLoaded = function () {
+	    if (_loadPromise) return _loadPromise;
+	    return _loadPromise = Promise.all([// must have strings and presets before loading the UI
+	    _mainLocalizer.ensureLoaded(), _mainPresetIndex.ensureLoaded()]).then(function () {
+	      if (!context.container().empty()) render(context.container());
+	    })["catch"](function (err) {
+	      return console.error(err);
+	    }); // eslint-disable-line
+	  }; // `ui.restart()` will destroy and rebuild the entire iD interface,
+	  // for example to switch the locale while iD is running.
 
-	Iterator$1.prototype.hasNext = function hasNext () {};
 
-	/**
-	 * Returns the next element in the iteration.
-	 * @return {Object}
-	 */
-	Iterator$1.prototype.next = function next () {};
+	  ui.restart = function () {
+	    context.keybinding().clear();
+	    _loadPromise = null;
+	    context.container().selectAll('*').remove();
+	    ui.ensureLoaded();
+	  };
 
-	/**
-	 * Removes from the underlying collection the last element returned by the
-	 * iterator (optional operation).
-	 */
-	Iterator$1.prototype.remove = function remove () {};
+	  ui.lastPointerType = function () {
+	    return _lastPointerType;
+	  };
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/List.html
-	 *
-	 * @extends {javascript.util.Collection}
-	 * @constructor
-	 * @private
-	 */
-	var List = (function (Collection$$1) {
-	  function List () {
-	    Collection$$1.apply(this, arguments);
-	  }
+	  ui.svgDefs = svgDefs(context);
+	  ui.flash = uiFlash(context);
+	  ui.sidebar = uiSidebar(context);
+	  ui.photoviewer = uiPhotoviewer(context);
+	  ui.shortcuts = uiShortcuts(context);
 
-	  if ( Collection$$1 ) { List.__proto__ = Collection$$1; }
-	  List.prototype = Object.create( Collection$$1 && Collection$$1.prototype );
-	  List.prototype.constructor = List;
+	  ui.onResize = function (withPan) {
+	    var map = context.map(); // Recalc dimensions of map and sidebar.. (`true` = force recalc)
+	    // This will call `getBoundingClientRect` and trigger reflow,
+	    //  but the values will be cached for later use.
 
-	  List.prototype.get = function get () { };
+	    var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
+	    utilGetDimensions(context.container().select('.sidebar'), true);
 
-	  /**
-	   * Replaces the element at the specified position in this list with the
-	   * specified element (optional operation).
-	   * @param {number} index
-	   * @param {Object} e
-	   * @return {Object}
-	   */
-	  List.prototype.set = function set () { };
+	    if (withPan !== undefined) {
+	      map.redrawEnable(false);
+	      map.pan(withPan);
+	      map.redrawEnable(true);
+	    }
 
-	  /**
-	   * Returns true if this collection contains no elements.
-	   * @return {boolean}
-	   */
-	  List.prototype.isEmpty = function isEmpty () { };
+	    map.dimensions(mapDimensions);
+	    ui.photoviewer.onMapResize(); // check if header or footer have overflowed
 
-	  return List;
-	}(Collection));
+	    ui.checkOverflow('.top-toolbar');
+	    ui.checkOverflow('.map-footer-bar'); // Use outdated code so it works on Explorer
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function NoSuchElementException (message) {
-	  this.message = message || '';
-	}
-	NoSuchElementException.prototype = new Error();
+	    var resizeWindowEvent = document.createEvent('Event');
+	    resizeWindowEvent.initEvent('resizeWindow', true, true);
+	    document.dispatchEvent(resizeWindowEvent);
+	  }; // Call checkOverflow when resizing or whenever the contents change.
 
-	/**
-	 * @type {string}
-	 */
-	NoSuchElementException.prototype.name = 'NoSuchElementException';
 
-	// import OperationNotSupported from './OperationNotSupported'
+	  ui.checkOverflow = function (selector, reset) {
+	    if (reset) {
+	      delete _needWidth[selector];
+	    }
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/ArrayList.html
-	 *
-	 * @extends List
-	 * @private
-	 */
-	var ArrayList = (function (List$$1) {
-	  function ArrayList () {
-	    List$$1.call(this);
-	    this.array_ = [];
+	    var selection = context.container().select(selector);
+	    if (selection.empty()) return;
+	    var scrollWidth = selection.property('scrollWidth');
+	    var clientWidth = selection.property('clientWidth');
+	    var needed = _needWidth[selector] || scrollWidth;
 
-	    if (arguments[0] instanceof Collection) {
-	      this.addAll(arguments[0]);
+	    if (scrollWidth > clientWidth) {
+	      // overflow happening
+	      selection.classed('narrow', true);
+
+	      if (!_needWidth[selector]) {
+	        _needWidth[selector] = scrollWidth;
+	      }
+	    } else if (scrollWidth >= needed) {
+	      selection.classed('narrow', false);
 	    }
-	  }
+	  };
 
-	  if ( List$$1 ) { ArrayList.__proto__ = List$$1; }
-	  ArrayList.prototype = Object.create( List$$1 && List$$1.prototype );
-	  ArrayList.prototype.constructor = ArrayList;
+	  ui.togglePanes = function (showPane) {
+	    var hidePanes = context.container().selectAll('.map-pane.shown');
+	    var side = _mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left';
+	    hidePanes.classed('shown', false).classed('hide', true);
+	    context.container().selectAll('.map-pane-control button').classed('active', false);
 
-	  ArrayList.prototype.ensureCapacity = function ensureCapacity () {};
-	  ArrayList.prototype.interfaces_ = function interfaces_ () { return [List$$1, Collection] };
+	    if (showPane) {
+	      hidePanes.classed('shown', false).classed('hide', true).style(side, '-500px');
+	      context.container().selectAll('.' + showPane.attr('pane') + '-control button').classed('active', true);
+	      showPane.classed('shown', true).classed('hide', false);
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.add = function add (e) {
-	    if (arguments.length === 1) {
-	      this.array_.push(e);
+	      if (hidePanes.empty()) {
+	        showPane.style(side, '-500px').transition().duration(200).style(side, '0px');
+	      } else {
+	        showPane.style(side, '0px');
+	      }
 	    } else {
-	      this.array_.splice(arguments[0], arguments[1]);
+	      hidePanes.classed('shown', true).classed('hide', false).style(side, '0px').transition().duration(200).style(side, '-500px').on('end', function () {
+	        select(this).classed('shown', false).classed('hide', true);
+	      });
 	    }
-	    return true
 	  };
 
-	  ArrayList.prototype.clear = function clear () {
-	    this.array_ = [];
+	  var _editMenu = uiEditMenu(context);
+
+	  ui.editMenu = function () {
+	    return _editMenu;
 	  };
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.addAll = function addAll (c) {
-	    var this$1 = this;
+	  ui.showEditMenu = function (anchorPoint, triggerType, operations) {
+	    // remove any displayed menu
+	    ui.closeEditMenu();
+	    if (!operations && context.mode().operations) operations = context.mode().operations();
+	    if (!operations || !operations.length) return; // disable menu if in wide selection, for example
 
-	    for (var i = c.iterator(); i.hasNext();) {
-	      this$1.add(i.next());
+	    if (!context.map().editableDataEnabled()) return;
+	    var surfaceNode = context.surface().node();
+
+	    if (surfaceNode.focus) {
+	      // FF doesn't support it
+	      // focus the surface or else clicking off the menu may not trigger modeBrowse
+	      surfaceNode.focus();
 	    }
-	    return true
-	  };
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.set = function set (index, element) {
-	    var oldElement = this.array_[index];
-	    this.array_[index] = element;
-	    return oldElement
-	  };
+	    operations.forEach(function (operation) {
+	      if (operation.point) operation.point(anchorPoint);
+	    });
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.iterator = function iterator () {
-	    return new Iterator_(this)
-	  };
+	    _editMenu.anchorLoc(anchorPoint).triggerType(triggerType).operations(operations); // render the menu
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.get = function get (index) {
-	    if (index < 0 || index >= this.size()) {
-	      throw new IndexOutOfBoundsException()
-	    }
 
-	    return this.array_[index]
+	    context.map().supersurface.call(_editMenu);
 	  };
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.isEmpty = function isEmpty () {
-	    return this.array_.length === 0
+	  ui.closeEditMenu = function () {
+	    // remove any existing menu no matter how it was added
+	    context.map().supersurface.select('.edit-menu').remove();
 	  };
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.size = function size () {
-	    return this.array_.length
-	  };
+	  var _saveLoading = select(null);
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.toArray = function toArray () {
-	    var this$1 = this;
+	  context.uploader().on('saveStarted.ui', function () {
+	    _saveLoading = uiLoading(context).message(_t.html('save.uploading')).blocking(true);
+	    context.container().call(_saveLoading); // block input during upload
+	  }).on('saveEnded.ui', function () {
+	    _saveLoading.close();
 
-	    var array = [];
+	    _saveLoading = select(null);
+	  });
+	  return ui;
+	}
 
-	    for (var i = 0, len = this.array_.length; i < len; i++) {
-	      array.push(this$1.array_[i]);
-	    }
+	function coreContext() {
+	  var _this = this;
 
-	    return array
-	  };
+	  var dispatch = dispatch$8('enter', 'exit', 'change');
+	  var context = utilRebind({}, dispatch, 'on');
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.remove = function remove (o) {
-	    var this$1 = this;
+	  var _deferred = new Set();
 
-	    var found = false;
+	  context.version = '2.20.4';
+	  context.privacyVersion = '20201202'; // iD will alter the hash so cache the parameters intended to setup the session
 
-	    for (var i = 0, len = this.array_.length; i < len; i++) {
-	      if (this$1.array_[i] === o) {
-	        this$1.array_.splice(i, 1);
-	        found = true;
-	        break
-	      }
-	    }
+	  context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
+	  /* Changeset */
+	  // An osmChangeset object. Not loaded until needed.
+
+	  context.changeset = null;
+	  var _defaultChangesetComment = context.initialHashParams.comment;
+	  var _defaultChangesetSource = context.initialHashParams.source;
+	  var _defaultChangesetHashtags = context.initialHashParams.hashtags;
+
+	  context.defaultChangesetComment = function (val) {
+	    if (!arguments.length) return _defaultChangesetComment;
+	    _defaultChangesetComment = val;
+	    return context;
+	  };
 
-	    return found
+	  context.defaultChangesetSource = function (val) {
+	    if (!arguments.length) return _defaultChangesetSource;
+	    _defaultChangesetSource = val;
+	    return context;
 	  };
 
-	  return ArrayList;
-	}(List));
+	  context.defaultChangesetHashtags = function (val) {
+	    if (!arguments.length) return _defaultChangesetHashtags;
+	    _defaultChangesetHashtags = val;
+	    return context;
+	  };
+	  /* Document title */
 
-	/**
-	 * @extends {Iterator}
-	 * @param {ArrayList} arrayList
-	 * @constructor
-	 * @private
-	 */
-	var Iterator_ = (function (Iterator$$1) {
-	  function Iterator_ (arrayList) {
-	    Iterator$$1.call(this);
-	    /**
-	     * @type {ArrayList}
-	     * @private
-	    */
-	    this.arrayList_ = arrayList;
-	    /**
-	     * @type {number}
-	     * @private
-	    */
-	    this.position_ = 0;
-	  }
+	  /* (typically shown as the label for the browser window/tab) */
+	  // If true, iD will update the title based on what the user is doing
 
-	  if ( Iterator$$1 ) { Iterator_.__proto__ = Iterator$$1; }
-	  Iterator_.prototype = Object.create( Iterator$$1 && Iterator$$1.prototype );
-	  Iterator_.prototype.constructor = Iterator_;
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.next = function next () {
-	    if (this.position_ === this.arrayList_.size()) {
-	      throw new NoSuchElementException()
-	    }
-	    return this.arrayList_.get(this.position_++)
-	  };
+	  var _setsDocumentTitle = true;
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.hasNext = function hasNext () {
-	    if (this.position_ < this.arrayList_.size()) {
-	      return true
-	    } else {
-	      return false
-	    }
-	  };
+	  context.setsDocumentTitle = function (val) {
+	    if (!arguments.length) return _setsDocumentTitle;
+	    _setsDocumentTitle = val;
+	    return context;
+	  }; // The part of the title that is always the same
 
-	  /**
-	   * TODO: should be in ListIterator
-	   * @override
-	   */
-	  Iterator_.prototype.set = function set (element) {
-	    return this.arrayList_.set(this.position_ - 1, element)
-	  };
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.remove = function remove () {
-	    this.arrayList_.remove(this.arrayList_.get(this.position_));
-	  };
-
-	  return Iterator_;
-	}(Iterator$1));
-
-	var CoordinateList = (function (ArrayList$$1) {
-	  function CoordinateList () {
-	    ArrayList$$1.call(this);
-	    if (arguments.length === 0) ; else if (arguments.length === 1) {
-	      var coord = arguments[0];
-	      this.ensureCapacity(coord.length);
-	      this.add(coord, true);
-	    } else if (arguments.length === 2) {
-	      var coord$1 = arguments[0];
-	      var allowRepeated = arguments[1];
-	      this.ensureCapacity(coord$1.length);
-	      this.add(coord$1, allowRepeated);
-	    }
-	  }
-
-	  if ( ArrayList$$1 ) { CoordinateList.__proto__ = ArrayList$$1; }
-	  CoordinateList.prototype = Object.create( ArrayList$$1 && ArrayList$$1.prototype );
-	  CoordinateList.prototype.constructor = CoordinateList;
-
-	  var staticAccessors = { coordArrayType: { configurable: true } };
-	  staticAccessors.coordArrayType.get = function () { return new Array(0).fill(null) };
-	  CoordinateList.prototype.getCoordinate = function getCoordinate (i) {
-	    return this.get(i)
-	  };
-	  CoordinateList.prototype.addAll = function addAll () {
-	    var this$1 = this;
-
-	    if (arguments.length === 2) {
-	      var coll = arguments[0];
-	      var allowRepeated = arguments[1];
-	      var isChanged = false;
-	      for (var i = coll.iterator(); i.hasNext();) {
-	        this$1.add(i.next(), allowRepeated);
-	        isChanged = true;
-	      }
-	      return isChanged
-	    } else { return ArrayList$$1.prototype.addAll.apply(this, arguments) }
-	  };
-	  CoordinateList.prototype.clone = function clone () {
-	    var this$1 = this;
-
-	    var clone = ArrayList$$1.prototype.clone.call(this);
-	    for (var i = 0; i < this.size(); i++) {
-	      clone.add(i, this$1.get(i).copy());
-	    }
-	    return clone
-	  };
-	  CoordinateList.prototype.toCoordinateArray = function toCoordinateArray () {
-	    return this.toArray(CoordinateList.coordArrayType)
-	  };
-	  CoordinateList.prototype.add = function add () {
-	    var this$1 = this;
-
-	    if (arguments.length === 1) {
-	      var coord = arguments[0];
-	      ArrayList$$1.prototype.add.call(this, coord);
-	    } else if (arguments.length === 2) {
-	      if (arguments[0] instanceof Array && typeof arguments[1] === 'boolean') {
-	        var coord$1 = arguments[0];
-	        var allowRepeated = arguments[1];
-	        this.add(coord$1, allowRepeated, true);
-	        return true
-	      } else if (arguments[0] instanceof Coordinate && typeof arguments[1] === 'boolean') {
-	        var coord$2 = arguments[0];
-	        var allowRepeated$1 = arguments[1];
-	        if (!allowRepeated$1) {
-	          if (this.size() >= 1) {
-	            var last = this.get(this.size() - 1);
-	            if (last.equals2D(coord$2)) { return null }
-	          }
-	        }
-	        ArrayList$$1.prototype.add.call(this, coord$2);
-	      } else if (arguments[0] instanceof Object && typeof arguments[1] === 'boolean') {
-	        var obj = arguments[0];
-	        var allowRepeated$2 = arguments[1];
-	        this.add(obj, allowRepeated$2);
-	        return true
-	      }
-	    } else if (arguments.length === 3) {
-	      if (typeof arguments[2] === 'boolean' && (arguments[0] instanceof Array && typeof arguments[1] === 'boolean')) {
-	        var coord$3 = arguments[0];
-	        var allowRepeated$3 = arguments[1];
-	        var direction = arguments[2];
-	        if (direction) {
-	          for (var i$1 = 0; i$1 < coord$3.length; i$1++) {
-	            this$1.add(coord$3[i$1], allowRepeated$3);
-	          }
-	        } else {
-	          for (var i$2 = coord$3.length - 1; i$2 >= 0; i$2--) {
-	            this$1.add(coord$3[i$2], allowRepeated$3);
-	          }
-	        }
-	        return true
-	      } else if (typeof arguments[2] === 'boolean' && (Number.isInteger(arguments[0]) && arguments[1] instanceof Coordinate)) {
-	        var i$3 = arguments[0];
-	        var coord$4 = arguments[1];
-	        var allowRepeated$4 = arguments[2];
-	        if (!allowRepeated$4) {
-	          var size = this.size();
-	          if (size > 0) {
-	            if (i$3 > 0) {
-	              var prev = this.get(i$3 - 1);
-	              if (prev.equals2D(coord$4)) { return null }
-	            }
-	            if (i$3 < size) {
-	              var next = this.get(i$3);
-	              if (next.equals2D(coord$4)) { return null }
-	            }
-	          }
-	        }
-	        ArrayList$$1.prototype.add.call(this, i$3, coord$4);
-	      }
-	    } else if (arguments.length === 4) {
-	      var coord$5 = arguments[0];
-	      var allowRepeated$5 = arguments[1];
-	      var start = arguments[2];
-	      var end = arguments[3];
-	      var inc = 1;
-	      if (start > end) { inc = -1; }
-	      for (var i = start; i !== end; i += inc) {
-	        this$1.add(coord$5[i], allowRepeated$5);
-	      }
-	      return true
-	    }
-	  };
-	  CoordinateList.prototype.closeRing = function closeRing () {
-	    if (this.size() > 0) { this.add(new Coordinate(this.get(0)), false); }
+	  var _documentTitleBase = document.title;
+
+	  context.documentTitleBase = function (val) {
+	    if (!arguments.length) return _documentTitleBase;
+	    _documentTitleBase = val;
+	    return context;
 	  };
-	  CoordinateList.prototype.interfaces_ = function interfaces_ () {
-	    return []
+	  /* User interface and keybinding */
+
+
+	  var _ui;
+
+	  context.ui = function () {
+	    return _ui;
 	  };
-	  CoordinateList.prototype.getClass = function getClass () {
-	    return CoordinateList
+
+	  context.lastPointerType = function () {
+	    return _ui.lastPointerType();
 	  };
 
-	  Object.defineProperties( CoordinateList, staticAccessors );
+	  var _keybinding = utilKeybinding('context');
 
-	  return CoordinateList;
-	}(ArrayList));
+	  context.keybinding = function () {
+	    return _keybinding;
+	  };
 
-	var CoordinateArrays = function CoordinateArrays () {};
+	  select(document).call(_keybinding);
+	  /* Straight accessors. Avoid using these if you can. */
+	  // Instantiate the connection here because it doesn't require passing in
+	  // `context` and it's needed for pre-init calls like `preauth`
 
-	var staticAccessors$13 = { ForwardComparator: { configurable: true },BidirectionalComparator: { configurable: true },coordArrayType: { configurable: true } };
+	  var _connection = services.osm;
 
-	staticAccessors$13.ForwardComparator.get = function () { return ForwardComparator };
-	staticAccessors$13.BidirectionalComparator.get = function () { return BidirectionalComparator };
-	staticAccessors$13.coordArrayType.get = function () { return new Array(0).fill(null) };
+	  var _history;
 
-	CoordinateArrays.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateArrays.prototype.getClass = function getClass () {
-	  return CoordinateArrays
-	};
-	CoordinateArrays.isRing = function isRing (pts) {
-	  if (pts.length < 4) { return false }
-	  if (!pts[0].equals2D(pts[pts.length - 1])) { return false }
-	  return true
-	};
-	CoordinateArrays.ptNotInList = function ptNotInList (testPts, pts) {
-	  for (var i = 0; i < testPts.length; i++) {
-	    var testPt = testPts[i];
-	    if (CoordinateArrays.indexOf(testPt, pts) < 0) { return testPt }
-	  }
-	  return null
-	};
-	CoordinateArrays.scroll = function scroll (coordinates, firstCoordinate) {
-	  var i = CoordinateArrays.indexOf(firstCoordinate, coordinates);
-	  if (i < 0) { return null }
-	  var newCoordinates = new Array(coordinates.length).fill(null);
-	  System.arraycopy(coordinates, i, newCoordinates, 0, coordinates.length - i);
-	  System.arraycopy(coordinates, 0, newCoordinates, coordinates.length - i, i);
-	  System.arraycopy(newCoordinates, 0, coordinates, 0, coordinates.length);
-	};
-	CoordinateArrays.equals = function equals () {
-	  if (arguments.length === 2) {
-	    var coord1 = arguments[0];
-	    var coord2 = arguments[1];
-	    if (coord1 === coord2) { return true }
-	    if (coord1 === null || coord2 === null) { return false }
-	    if (coord1.length !== coord2.length) { return false }
-	    for (var i = 0; i < coord1.length; i++) {
-	      if (!coord1[i].equals(coord2[i])) { return false }
-	    }
-	    return true
-	  } else if (arguments.length === 3) {
-	    var coord1$1 = arguments[0];
-	    var coord2$1 = arguments[1];
-	    var coordinateComparator = arguments[2];
-	    if (coord1$1 === coord2$1) { return true }
-	    if (coord1$1 === null || coord2$1 === null) { return false }
-	    if (coord1$1.length !== coord2$1.length) { return false }
-	    for (var i$1 = 0; i$1 < coord1$1.length; i$1++) {
-	      if (coordinateComparator.compare(coord1$1[i$1], coord2$1[i$1]) !== 0) { return false }
-	    }
-	    return true
-	  }
-	};
-	CoordinateArrays.intersection = function intersection (coordinates, env) {
-	  var coordList = new CoordinateList();
-	  for (var i = 0; i < coordinates.length; i++) {
-	    if (env.intersects(coordinates[i])) { coordList.add(coordinates[i], true); }
-	  }
-	  return coordList.toCoordinateArray()
-	};
-	CoordinateArrays.hasRepeatedPoints = function hasRepeatedPoints (coord) {
-	  for (var i = 1; i < coord.length; i++) {
-	    if (coord[i - 1].equals(coord[i])) {
-	      return true
-	    }
-	  }
-	  return false
-	};
-	CoordinateArrays.removeRepeatedPoints = function removeRepeatedPoints (coord) {
-	  if (!CoordinateArrays.hasRepeatedPoints(coord)) { return coord }
-	  var coordList = new CoordinateList(coord, false);
-	  return coordList.toCoordinateArray()
-	};
-	CoordinateArrays.reverse = function reverse (coord) {
-	  var last = coord.length - 1;
-	  var mid = Math.trunc(last / 2);
-	  for (var i = 0; i <= mid; i++) {
-	    var tmp = coord[i];
-	    coord[i] = coord[last - i];
-	    coord[last - i] = tmp;
-	  }
-	};
-	CoordinateArrays.removeNull = function removeNull (coord) {
-	  var nonNull = 0;
-	  for (var i = 0; i < coord.length; i++) {
-	    if (coord[i] !== null) { nonNull++; }
-	  }
-	  var newCoord = new Array(nonNull).fill(null);
-	  if (nonNull === 0) { return newCoord }
-	  var j = 0;
-	  for (var i$1 = 0; i$1 < coord.length; i$1++) {
-	    if (coord[i$1] !== null) { newCoord[j++] = coord[i$1]; }
-	  }
-	  return newCoord
-	};
-	CoordinateArrays.copyDeep = function copyDeep () {
-	  if (arguments.length === 1) {
-	    var coordinates = arguments[0];
-	    var copy = new Array(coordinates.length).fill(null);
-	    for (var i = 0; i < coordinates.length; i++) {
-	      copy[i] = new Coordinate(coordinates[i]);
-	    }
-	    return copy
-	  } else if (arguments.length === 5) {
-	    var src = arguments[0];
-	    var srcStart = arguments[1];
-	    var dest = arguments[2];
-	    var destStart = arguments[3];
-	    var length = arguments[4];
-	    for (var i$1 = 0; i$1 < length; i$1++) {
-	      dest[destStart + i$1] = new Coordinate(src[srcStart + i$1]);
-	    }
-	  }
-	};
-	CoordinateArrays.isEqualReversed = function isEqualReversed (pts1, pts2) {
-	  for (var i = 0; i < pts1.length; i++) {
-	    var p1 = pts1[i];
-	    var p2 = pts2[pts1.length - i - 1];
-	    if (p1.compareTo(p2) !== 0) { return false }
-	  }
-	  return true
-	};
-	CoordinateArrays.envelope = function envelope (coordinates) {
-	  var env = new Envelope();
-	  for (var i = 0; i < coordinates.length; i++) {
-	    env.expandToInclude(coordinates[i]);
-	  }
-	  return env
-	};
-	CoordinateArrays.toCoordinateArray = function toCoordinateArray (coordList) {
-	  return coordList.toArray(CoordinateArrays.coordArrayType)
-	};
-	CoordinateArrays.atLeastNCoordinatesOrNothing = function atLeastNCoordinatesOrNothing (n, c) {
-	  return c.length >= n ? c : []
-	};
-	CoordinateArrays.indexOf = function indexOf (coordinate, coordinates) {
-	  for (var i = 0; i < coordinates.length; i++) {
-	    if (coordinate.equals(coordinates[i])) {
-	      return i
-	    }
-	  }
-	  return -1
-	};
-	CoordinateArrays.increasingDirection = function increasingDirection (pts) {
-	  for (var i = 0; i < Math.trunc(pts.length / 2); i++) {
-	    var j = pts.length - 1 - i;
-	    var comp = pts[i].compareTo(pts[j]);
-	    if (comp !== 0) { return comp }
-	  }
-	  return 1
-	};
-	CoordinateArrays.compare = function compare (pts1, pts2) {
-	  var i = 0;
-	  while (i < pts1.length && i < pts2.length) {
-	    var compare = pts1[i].compareTo(pts2[i]);
-	    if (compare !== 0) { return compare }
-	    i++;
-	  }
-	  if (i < pts2.length) { return -1 }
-	  if (i < pts1.length) { return 1 }
-	  return 0
-	};
-	CoordinateArrays.minCoordinate = function minCoordinate (coordinates) {
-	  var minCoord = null;
-	  for (var i = 0; i < coordinates.length; i++) {
-	    if (minCoord === null || minCoord.compareTo(coordinates[i]) > 0) {
-	      minCoord = coordinates[i];
-	    }
-	  }
-	  return minCoord
-	};
-	CoordinateArrays.extract = function extract (pts, start, end) {
-	  start = MathUtil.clamp(start, 0, pts.length);
-	  end = MathUtil.clamp(end, -1, pts.length);
-	  var npts = end - start + 1;
-	  if (end < 0) { npts = 0; }
-	  if (start >= pts.length) { npts = 0; }
-	  if (end < start) { npts = 0; }
-	  var extractPts = new Array(npts).fill(null);
-	  if (npts === 0) { return extractPts }
-	  var iPts = 0;
-	  for (var i = start; i <= end; i++) {
-	    extractPts[iPts++] = pts[i];
-	  }
-	  return extractPts
-	};
+	  var _validator;
 
-	Object.defineProperties( CoordinateArrays, staticAccessors$13 );
+	  var _uploader;
 
-	var ForwardComparator = function ForwardComparator () {};
+	  context.connection = function () {
+	    return _connection;
+	  };
 
-	ForwardComparator.prototype.compare = function compare (o1, o2) {
-	  var pts1 = o1;
-	  var pts2 = o2;
-	  return CoordinateArrays.compare(pts1, pts2)
-	};
-	ForwardComparator.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparator]
-	};
-	ForwardComparator.prototype.getClass = function getClass () {
-	  return ForwardComparator
-	};
+	  context.history = function () {
+	    return _history;
+	  };
 
-	var BidirectionalComparator = function BidirectionalComparator () {};
-
-	BidirectionalComparator.prototype.compare = function compare (o1, o2) {
-	  var pts1 = o1;
-	  var pts2 = o2;
-	  if (pts1.length < pts2.length) { return -1 }
-	  if (pts1.length > pts2.length) { return 1 }
-	  if (pts1.length === 0) { return 0 }
-	  var forwardComp = CoordinateArrays.compare(pts1, pts2);
-	  var isEqualRev = CoordinateArrays.isEqualReversed(pts1, pts2);
-	  if (isEqualRev) { return 0 }
-	  return forwardComp
-	};
-	BidirectionalComparator.prototype.OLDcompare = function OLDcompare (o1, o2) {
-	  var pts1 = o1;
-	  var pts2 = o2;
-	  if (pts1.length < pts2.length) { return -1 }
-	  if (pts1.length > pts2.length) { return 1 }
-	  if (pts1.length === 0) { return 0 }
-	  var dir1 = CoordinateArrays.increasingDirection(pts1);
-	  var dir2 = CoordinateArrays.increasingDirection(pts2);
-	  var i1 = dir1 > 0 ? 0 : pts1.length - 1;
-	  var i2 = dir2 > 0 ? 0 : pts1.length - 1;
-	  for (var i = 0; i < pts1.length; i++) {
-	    var comparePt = pts1[i1].compareTo(pts2[i2]);
-	    if (comparePt !== 0) { return comparePt }
-	    i1 += dir1;
-	    i2 += dir2;
-	  }
-	  return 0
-	};
-	BidirectionalComparator.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparator]
-	};
-	BidirectionalComparator.prototype.getClass = function getClass () {
-	  return BidirectionalComparator
-	};
+	  context.validator = function () {
+	    return _validator;
+	  };
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Map.html
-	 *
-	 * @constructor
-	 * @private
-	 */
-	var Map$1$1 = function Map () {};
+	  context.uploader = function () {
+	    return _uploader;
+	  };
+	  /* Connection */
 
-	Map$1$1.prototype.get = function get () {};
-	/**
-	 * Associates the specified value with the specified key in this map (optional
-	 * operation).
-	 * @param {Object} key
-	 * @param {Object} value
-	 * @return {Object}
-	 */
-	Map$1$1.prototype.put = function put () {};
 
-	/**
-	 * Returns the number of key-value mappings in this map.
-	 * @return {number}
-	 */
-	Map$1$1.prototype.size = function size () {};
+	  context.preauth = function (options) {
+	    if (_connection) {
+	      _connection["switch"](options);
+	    }
 
-	/**
-	 * Returns a Collection view of the values contained in this map.
-	 * @return {javascript.util.Collection}
-	 */
-	Map$1$1.prototype.values = function values () {};
+	    return context;
+	  };
+	  /* connection options for source switcher (optional) */
 
-	/**
-	 * Returns a {@link Set} view of the mappings contained in this map.
-	 * The set is backed by the map, so changes to the map are
-	 * reflected in the set, and vice-versa.If the map is modified
-	 * while an iteration over the set is in progress (except through
-	 * the iterator's own <tt>remove</tt> operation, or through the
-	 * <tt>setValue</tt> operation on a map entry returned by the
-	 * iterator) the results of the iteration are undefined.The set
-	 * supports element removal, which removes the corresponding
-	 * mapping from the map, via the <tt>Iterator.remove</tt>,
-	 * <tt>Set.remove</tt>, <tt>removeAll</tt>, <tt>retainAll</tt> and
-	 * <tt>clear</tt> operations.It does not support the
-	 * <tt>add</tt> or <tt>addAll</tt> operations.
-	 *
-	 * @return {Set} a set view of the mappings contained in this map
-	 */
-	Map$1$1.prototype.entrySet = function entrySet () {};
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/SortedMap.html
-	 *
-	 * @extends {Map}
-	 * @constructor
-	 * @private
-	 */
-	var SortedMap = (function (Map) {
-		function SortedMap () {
-			Map.apply(this, arguments);
-		}if ( Map ) { SortedMap.__proto__ = Map; }
-		SortedMap.prototype = Object.create( Map && Map.prototype );
-		SortedMap.prototype.constructor = SortedMap;
+	  var _apiConnections;
 
-		
+	  context.apiConnections = function (val) {
+	    if (!arguments.length) return _apiConnections;
+	    _apiConnections = val;
+	    return context;
+	  }; // A string or array or locale codes to prefer over the browser's settings
 
-		return SortedMap;
-	}(Map$1$1));
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function OperationNotSupported (message) {
-	  this.message = message || '';
-	}
-	OperationNotSupported.prototype = new Error();
+	  context.locale = function (locale) {
+	    if (!arguments.length) return _mainLocalizer.localeCode();
+	    _mainLocalizer.preferredLocaleCodes(locale);
+	    return context;
+	  };
 
-	/**
-	 * @type {string}
-	 */
-	OperationNotSupported.prototype.name = 'OperationNotSupported';
+	  function afterLoad(cid, callback) {
+	    return function (err, result) {
+	      if (err) {
+	        // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
+	        if (err.status === 400 || err.status === 401 || err.status === 403) {
+	          if (_connection) {
+	            _connection.logout();
+	          }
+	        }
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Set.html
-	 *
-	 * @extends {Collection}
-	 * @constructor
-	 * @private
-	 */
-	function Set$2() {}
-	Set$2.prototype = new Collection();
+	        if (typeof callback === 'function') {
+	          callback(err);
+	        }
 
+	        return;
+	      } else if (_connection && _connection.getConnectionId() !== cid) {
+	        if (typeof callback === 'function') {
+	          callback({
+	            message: 'Connection Switched',
+	            status: -1
+	          });
+	        }
 
-	/**
-	 * Returns true if this set contains the specified element. More formally,
-	 * returns true if and only if this set contains an element e such that (o==null ?
-	 * e==null : o.equals(e)).
-	 * @param {Object} e
-	 * @return {boolean}
-	 */
-	Set$2.prototype.contains = function() {};
+	        return;
+	      } else {
+	        _history.merge(result.data, result.extent);
 
-	/**
-	 * @see http://docs.oracle.com/javase/6/docs/api/java/util/HashSet.html
-	 *
-	 * @extends {javascript.util.Set}
-	 * @constructor
-	 * @private
-	 */
-	var HashSet = (function (Set$$1) {
-	  function HashSet () {
-	    Set$$1.call(this);
-	    this.array_ = [];
+	        if (typeof callback === 'function') {
+	          callback(err, result);
+	        }
 
-	    if (arguments[0] instanceof Collection) {
-	      this.addAll(arguments[0]);
-	    }
+	        return;
+	      }
+	    };
 	  }
 
-	  if ( Set$$1 ) { HashSet.__proto__ = Set$$1; }
-	  HashSet.prototype = Object.create( Set$$1 && Set$$1.prototype );
-	  HashSet.prototype.constructor = HashSet;
+	  context.loadTiles = function (projection, callback) {
+	    var handle = window.requestIdleCallback(function () {
+	      _deferred["delete"](handle);
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.contains = function contains (o) {
-	    var this$1 = this;
+	      if (_connection && context.editableDataEnabled()) {
+	        var cid = _connection.getConnectionId();
 
-	    for (var i = 0, len = this.array_.length; i < len; i++) {
-	      var e = this$1.array_[i];
-	      if (e === o) {
-	        return true
+	        _connection.loadTiles(projection, afterLoad(cid, callback));
 	      }
-	    }
-	    return false
+	    });
+
+	    _deferred.add(handle);
 	  };
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.add = function add (o) {
-	    if (this.contains(o)) {
-	      return false
-	    }
+	  context.loadTileAtLoc = function (loc, callback) {
+	    var handle = window.requestIdleCallback(function () {
+	      _deferred["delete"](handle);
+
+	      if (_connection && context.editableDataEnabled()) {
+	        var cid = _connection.getConnectionId();
 
-	    this.array_.push(o);
+	        _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
+	      }
+	    });
 
-	    return true
-	  };
+	    _deferred.add(handle);
+	  }; // Download the full entity and its parent relations. The callback may be called multiple times.
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.addAll = function addAll (c) {
-	    var this$1 = this;
 
-	    for (var i = c.iterator(); i.hasNext();) {
-	      this$1.add(i.next());
+	  context.loadEntity = function (entityID, callback) {
+	    if (_connection) {
+	      var cid = _connection.getConnectionId();
+
+	      _connection.loadEntity(entityID, afterLoad(cid, callback)); // We need to fetch the parent relations separately.
+
+
+	      _connection.loadEntityRelations(entityID, afterLoad(cid, callback));
 	    }
-	    return true
 	  };
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.remove = function remove (o) {
-	    // throw new javascript.util.OperationNotSupported()
-	    throw new Error()
-	  };
+	  context.zoomToEntity = function (entityID, zoomTo) {
+	    // be sure to load the entity even if we're not going to zoom to it
+	    context.loadEntity(entityID, function (err, result) {
+	      if (err) return;
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.size = function size () {
-	    return this.array_.length
-	  };
+	      if (zoomTo !== false) {
+	        var entity = result.data.find(function (e) {
+	          return e.id === entityID;
+	        });
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.isEmpty = function isEmpty () {
-	    return this.array_.length === 0
-	  };
+	        if (entity) {
+	          _map.zoomTo(entity);
+	        }
+	      }
+	    });
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.toArray = function toArray () {
-	    var this$1 = this;
+	    _map.on('drawn.zoomToEntity', function () {
+	      if (!context.hasEntity(entityID)) return;
 
-	    var array = [];
+	      _map.on('drawn.zoomToEntity', null);
 
-	    for (var i = 0, len = this.array_.length; i < len; i++) {
-	      array.push(this$1.array_[i]);
-	    }
+	      context.on('enter.zoomToEntity', null);
+	      context.enter(modeSelect(context, [entityID]));
+	    });
 
-	    return array
-	  };
+	    context.on('enter.zoomToEntity', function () {
+	      if (_mode.id !== 'browse') {
+	        _map.on('drawn.zoomToEntity', null);
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.iterator = function iterator () {
-	    return new Iterator_$1(this)
+	        context.on('enter.zoomToEntity', null);
+	      }
+	    });
 	  };
 
-	  return HashSet;
-	}(Set$2));
-
-	/**
-	   * @extends {Iterator}
-	   * @param {HashSet} hashSet
-	   * @constructor
-	   * @private
-	   */
-	var Iterator_$1 = (function (Iterator$$1) {
-	  function Iterator_ (hashSet) {
-	    Iterator$$1.call(this);
-	    /**
-	     * @type {HashSet}
-	     * @private
-	     */
-	    this.hashSet_ = hashSet;
-	    /**
-	     * @type {number}
-	     * @private
-	     */
-	    this.position_ = 0;
-	  }
+	  var _minEditableZoom = 16;
 
-	  if ( Iterator$$1 ) { Iterator_.__proto__ = Iterator$$1; }
-	  Iterator_.prototype = Object.create( Iterator$$1 && Iterator$$1.prototype );
-	  Iterator_.prototype.constructor = Iterator_;
+	  context.minEditableZoom = function (val) {
+	    if (!arguments.length) return _minEditableZoom;
+	    _minEditableZoom = val;
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.next = function next () {
-	    if (this.position_ === this.hashSet_.size()) {
-	      throw new NoSuchElementException()
+	    if (_connection) {
+	      _connection.tileZoom(val);
 	    }
-	    return this.hashSet_.array_[this.position_++]
+
+	    return context;
+	  }; // String length limits in Unicode characters, not JavaScript UTF-16 code units
+
+
+	  context.maxCharsForTagKey = function () {
+	    return 255;
 	  };
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.hasNext = function hasNext () {
-	    if (this.position_ < this.hashSet_.size()) {
-	      return true
-	    } else {
-	      return false
-	    }
+	  context.maxCharsForTagValue = function () {
+	    return 255;
 	  };
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.remove = function remove () {
-	    throw new OperationNotSupported()
+	  context.maxCharsForRelationRole = function () {
+	    return 255;
 	  };
 
-	  return Iterator_;
-	}(Iterator$1));
+	  function cleanOsmString(val, maxChars) {
+	    // be lenient with input
+	    if (val === undefined || val === null) {
+	      val = '';
+	    } else {
+	      val = val.toString();
+	    } // remove whitespace
 
-	var BLACK = 0;
-	var RED = 1;
-	function colorOf (p) { return (p === null ? BLACK : p.color) }
-	function parentOf (p) { return (p === null ? null : p.parent) }
-	function setColor (p, c) { if (p !== null) { p.color = c; } }
-	function leftOf (p) { return (p === null ? null : p.left) }
-	function rightOf (p) { return (p === null ? null : p.right) }
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/TreeMap.html
-	 *
-	 * @extends {SortedMap}
-	 * @constructor
-	 * @private
-	 */
-	function TreeMap () {
-	  /**
-	   * @type {Object}
-	   * @private
-	   */
-	  this.root_ = null;
-	  /**
-	   * @type {number}
-	   * @private
-	  */
-	  this.size_ = 0;
-	}
-	TreeMap.prototype = new SortedMap();
+	    val = val.trim(); // use the canonical form of the string
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.get = function (key) {
-	  var p = this.root_;
-	  while (p !== null) {
-	    var cmp = key['compareTo'](p.key);
-	    if (cmp < 0) { p = p.left; }
-	    else if (cmp > 0) { p = p.right; }
-	    else { return p.value }
-	  }
-	  return null
-	};
+	    if (val.normalize) val = val.normalize('NFC'); // trim to the number of allowed characters
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.put = function (key, value) {
-	  if (this.root_ === null) {
-	    this.root_ = {
-	      key: key,
-	      value: value,
-	      left: null,
-	      right: null,
-	      parent: null,
-	      color: BLACK,
-	      getValue: function getValue () { return this.value },
-	      getKey: function getKey () { return this.key }
-	    };
-	    this.size_ = 1;
-	    return null
+	    return utilUnicodeCharsTruncated(val, maxChars);
 	  }
-	  var t = this.root_;
-	  var parent;
-	  var cmp;
-	  do {
-	    parent = t;
-	    cmp = key['compareTo'](t.key);
-	    if (cmp < 0) {
-	      t = t.left;
-	    } else if (cmp > 0) {
-	      t = t.right;
-	    } else {
-	      var oldValue = t.value;
-	      t.value = value;
-	      return oldValue
-	    }
-	  } while (t !== null)
-	  var e = {
-	    key: key,
-	    left: null,
-	    right: null,
-	    value: value,
-	    parent: parent,
-	    color: BLACK,
-	    getValue: function getValue () { return this.value },
-	    getKey: function getKey () { return this.key }
+
+	  context.cleanTagKey = function (val) {
+	    return cleanOsmString(val, context.maxCharsForTagKey());
 	  };
-	  if (cmp < 0) {
-	    parent.left = e;
-	  } else {
-	    parent.right = e;
-	  }
-	  this.fixAfterInsertion(e);
-	  this.size_++;
-	  return null
-	};
 
-	/**
-	 * @param {Object} x
-	 */
-	TreeMap.prototype.fixAfterInsertion = function (x) {
-	  var this$1 = this;
-
-	  x.color = RED;
-	  while (x != null && x !== this.root_ && x.parent.color === RED) {
-	    if (parentOf(x) === leftOf(parentOf(parentOf(x)))) {
-	      var y = rightOf(parentOf(parentOf(x)));
-	      if (colorOf(y) === RED) {
-	        setColor(parentOf(x), BLACK);
-	        setColor(y, BLACK);
-	        setColor(parentOf(parentOf(x)), RED);
-	        x = parentOf(parentOf(x));
-	      } else {
-	        if (x === rightOf(parentOf(x))) {
-	          x = parentOf(x);
-	          this$1.rotateLeft(x);
-	        }
-	        setColor(parentOf(x), BLACK);
-	        setColor(parentOf(parentOf(x)), RED);
-	        this$1.rotateRight(parentOf(parentOf(x)));
-	      }
-	    } else {
-	      var y$1 = leftOf(parentOf(parentOf(x)));
-	      if (colorOf(y$1) === RED) {
-	        setColor(parentOf(x), BLACK);
-	        setColor(y$1, BLACK);
-	        setColor(parentOf(parentOf(x)), RED);
-	        x = parentOf(parentOf(x));
-	      } else {
-	        if (x === leftOf(parentOf(x))) {
-	          x = parentOf(x);
-	          this$1.rotateRight(x);
-	        }
-	        setColor(parentOf(x), BLACK);
-	        setColor(parentOf(parentOf(x)), RED);
-	        this$1.rotateLeft(parentOf(parentOf(x)));
-	      }
-	    }
-	  }
-	  this.root_.color = BLACK;
-	};
+	  context.cleanTagValue = function (val) {
+	    return cleanOsmString(val, context.maxCharsForTagValue());
+	  };
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.values = function () {
-	  var arrayList = new ArrayList();
-	  var p = this.getFirstEntry();
-	  if (p !== null) {
-	    arrayList.add(p.value);
-	    while ((p = TreeMap.successor(p)) !== null) {
-	      arrayList.add(p.value);
-	    }
-	  }
-	  return arrayList
-	};
+	  context.cleanRelationRole = function (val) {
+	    return cleanOsmString(val, context.maxCharsForRelationRole());
+	  };
+	  /* History */
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.entrySet = function () {
-	  var hashSet = new HashSet();
-	  var p = this.getFirstEntry();
-	  if (p !== null) {
-	    hashSet.add(p);
-	    while ((p = TreeMap.successor(p)) !== null) {
-	      hashSet.add(p);
-	    }
-	  }
-	  return hashSet
-	};
 
-	/**
-	 * @param {Object} p
-	 */
-	TreeMap.prototype.rotateLeft = function (p) {
-	  if (p != null) {
-	    var r = p.right;
-	    p.right = r.left;
-	    if (r.left != null) { r.left.parent = p; }
-	    r.parent = p.parent;
-	    if (p.parent === null) { this.root_ = r; } else if (p.parent.left === p) { p.parent.left = r; } else { p.parent.right = r; }
-	    r.left = p;
-	    p.parent = r;
-	  }
-	};
+	  var _inIntro = false;
 
-	/**
-	 * @param {Object} p
-	 */
-	TreeMap.prototype.rotateRight = function (p) {
-	  if (p != null) {
-	    var l = p.left;
-	    p.left = l.right;
-	    if (l.right != null) { l.right.parent = p; }
-	    l.parent = p.parent;
-	    if (p.parent === null) { this.root_ = l; } else if (p.parent.right === p) { p.parent.right = l; } else { p.parent.left = l; }
-	    l.right = p;
-	    p.parent = l;
-	  }
-	};
+	  context.inIntro = function (val) {
+	    if (!arguments.length) return _inIntro;
+	    _inIntro = val;
+	    return context;
+	  }; // Immediately save the user's history to localstorage, if possible
+	  // This is called someteimes, but also on the `window.onbeforeunload` handler
 
-	/**
-	 * @return {Object}
-	 */
-	TreeMap.prototype.getFirstEntry = function () {
-	  var p = this.root_;
-	  if (p != null) {
-	    while (p.left != null) {
-	      p = p.left;
-	    }
-	  }
-	  return p
-	};
 
-	/**
-	 * @param {Object} t
-	 * @return {Object}
-	 * @private
-	 */
-	TreeMap.successor = function (t) {
-	  if (t === null) { return null } else if (t.right !== null) {
-	    var p = t.right;
-	    while (p.left !== null) {
-	      p = p.left;
-	    }
-	    return p
-	  } else {
-	    var p$1 = t.parent;
-	    var ch = t;
-	    while (p$1 !== null && ch === p$1.right) {
-	      ch = p$1;
-	      p$1 = p$1.parent;
-	    }
-	    return p$1
-	  }
-	};
+	  context.save = function () {
+	    // no history save, no message onbeforeunload
+	    if (_inIntro || context.container().select('.modal').size()) return;
+	    var canSave;
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.size = function () {
-	  return this.size_
-	};
+	    if (_mode && _mode.id === 'save') {
+	      canSave = false; // Attempt to prevent user from creating duplicate changes - see #5200
+
+	      if (services.osm && services.osm.isChangesetInflight()) {
+	        _history.clearSaved();
+
+	        return;
+	      }
+	    } else {
+	      canSave = context.selectedIDs().every(function (id) {
+	        var entity = context.hasEntity(id);
+	        return entity && !entity.isDegenerate();
+	      });
+	    }
 
-	var Lineal = function Lineal () {};
+	    if (canSave) {
+	      _history.save();
+	    }
 
-	Lineal.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Lineal.prototype.getClass = function getClass () {
-	  return Lineal
-	};
+	    if (_history.hasChanges()) {
+	      return _t('save.unsaved_changes');
+	    }
+	  }; // Debounce save, since it's a synchronous localStorage write,
+	  // and history changes can happen frequently (e.g. when dragging).
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/SortedSet.html
-	 *
-	 * @extends {Set}
-	 * @constructor
-	 * @private
-	 */
-	function SortedSet () {}
-	SortedSet.prototype = new Set$2();
 
-	// import Iterator from './Iterator'
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/TreeSet.html
-	 *
-	 * @extends {SortedSet}
-	 * @constructor
-	 * @private
-	 */
-	function TreeSet () {
-	  /**
-	   * @type {Array}
-	   * @private
-	  */
-	  this.array_ = [];
+	  context.debouncedSave = debounce(context.save, 350);
 
-	  if (arguments[0] instanceof Collection) {
-	    this.addAll(arguments[0]);
+	  function withDebouncedSave(fn) {
+	    return function () {
+	      var result = fn.apply(_history, arguments);
+	      context.debouncedSave();
+	      return result;
+	    };
 	  }
-	}
-	TreeSet.prototype = new SortedSet();
+	  /* Graph */
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.contains = function (o) {
-	  var this$1 = this;
 
-	  for (var i = 0, len = this.array_.length; i < len; i++) {
-	    var e = this$1.array_[i];
-	    if (e['compareTo'](o) === 0) {
-	      return true
-	    }
-	  }
-	  return false
-	};
+	  context.hasEntity = function (id) {
+	    return _history.graph().hasEntity(id);
+	  };
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.add = function (o) {
-	  var this$1 = this;
+	  context.entity = function (id) {
+	    return _history.graph().entity(id);
+	  };
+	  /* Modes */
 
-	  if (this.contains(o)) {
-	    return false
-	  }
 
-	  for (var i = 0, len = this.array_.length; i < len; i++) {
-	    var e = this$1.array_[i];
-	    if (e['compareTo'](o) === 1) {
-	      this$1.array_.splice(i, 0, o);
-	      return true
-	    }
-	  }
+	  var _mode;
 
-	  this.array_.push(o);
+	  context.mode = function () {
+	    return _mode;
+	  };
 
-	  return true
-	};
+	  context.enter = function (newMode) {
+	    if (_mode) {
+	      _mode.exit();
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.addAll = function (c) {
-	  var this$1 = this;
+	      dispatch.call('exit', _this, _mode);
+	    }
 
-	  for (var i = c.iterator(); i.hasNext();) {
-	    this$1.add(i.next());
-	  }
-	  return true
-	};
+	    _mode = newMode;
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.remove = function (e) {
-	  throw new OperationNotSupported()
-	};
+	    _mode.enter();
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.size = function () {
-	  return this.array_.length
-	};
+	    dispatch.call('enter', _this, _mode);
+	  };
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.isEmpty = function () {
-	  return this.array_.length === 0
-	};
+	  context.selectedIDs = function () {
+	    return _mode && _mode.selectedIDs && _mode.selectedIDs() || [];
+	  };
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.toArray = function () {
-	  var this$1 = this;
+	  context.activeID = function () {
+	    return _mode && _mode.activeID && _mode.activeID();
+	  };
 
-	  var array = [];
+	  var _selectedNoteID;
 
-	  for (var i = 0, len = this.array_.length; i < len; i++) {
-	    array.push(this$1.array_[i]);
-	  }
+	  context.selectedNoteID = function (noteID) {
+	    if (!arguments.length) return _selectedNoteID;
+	    _selectedNoteID = noteID;
+	    return context;
+	  }; // NOTE: Don't change the name of this until UI v3 is merged
 
-	  return array
-	};
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.iterator = function () {
-	  return new Iterator_$2(this)
-	};
+	  var _selectedErrorID;
 
-	/**
-	 * @extends {javascript.util.Iterator}
-	 * @param {javascript.util.TreeSet} treeSet
-	 * @constructor
-	 * @private
-	 */
-	var Iterator_$2 = function (treeSet) {
-	  /**
-	   * @type {javascript.util.TreeSet}
-	   * @private
-	   */
-	  this.treeSet_ = treeSet;
-	  /**
-	   * @type {number}
-	   * @private
-	   */
-	  this.position_ = 0;
-	};
+	  context.selectedErrorID = function (errorID) {
+	    if (!arguments.length) return _selectedErrorID;
+	    _selectedErrorID = errorID;
+	    return context;
+	  };
+	  /* Behaviors */
 
-	/**
-	 * @override
-	 */
-	Iterator_$2.prototype.next = function () {
-	  if (this.position_ === this.treeSet_.size()) {
-	    throw new NoSuchElementException()
-	  }
-	  return this.treeSet_.array_[this.position_++]
-	};
 
-	/**
-	 * @override
-	 */
-	Iterator_$2.prototype.hasNext = function () {
-	  if (this.position_ < this.treeSet_.size()) {
-	    return true
-	  } else {
-	    return false
-	  }
-	};
+	  context.install = function (behavior) {
+	    return context.surface().call(behavior);
+	  };
 
-	/**
-	 * @override
-	 */
-	Iterator_$2.prototype.remove = function () {
-	  throw new OperationNotSupported()
-	};
+	  context.uninstall = function (behavior) {
+	    return context.surface().call(behavior.off);
+	  };
+	  /* Copy/Paste */
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Arrays.html
-	 *
-	 * @constructor
-	 * @private
-	 */
-	var Arrays = function Arrays () {};
 
-	Arrays.sort = function sort () {
-	  var a = arguments[0];
-	  var i;
-	  var t;
-	  var comparator;
-	  var compare;
-	  if (arguments.length === 1) {
-	    compare = function (a, b) {
-	      return a.compareTo(b)
-	    };
-	    a.sort(compare);
-	  } else if (arguments.length === 2) {
-	    comparator = arguments[1];
-	    compare = function (a, b) {
-	      return comparator['compare'](a, b)
-	    };
-	    a.sort(compare);
-	  } else if (arguments.length === 3) {
-	    t = a.slice(arguments[1], arguments[2]);
-	    t.sort();
-	    var r = a.slice(0, arguments[1]).concat(t, a.slice(arguments[2], a.length));
-	    a.splice(0, a.length);
-	    for (i = 0; i < r.length; i++) {
-	      a.push(r[i]);
-	    }
-	  } else if (arguments.length === 4) {
-	    t = a.slice(arguments[1], arguments[2]);
-	    comparator = arguments[3];
-	    compare = function (a, b) {
-	      return comparator['compare'](a, b)
-	    };
-	    t.sort(compare);
-	    r = a.slice(0, arguments[1]).concat(t, a.slice(arguments[2], a.length));
-	    a.splice(0, a.length);
-	    for (i = 0; i < r.length; i++) {
-	      a.push(r[i]);
-	    }
-	  }
-	};
-	/**
-	 * @param {Array} array
-	 * @return {ArrayList}
-	 */
-	Arrays.asList = function asList (array) {
-	  var arrayList = new ArrayList();
-	  for (var i = 0, len = array.length; i < len; i++) {
-	    arrayList.add(array[i]);
-	  }
-	  return arrayList
-	};
+	  var _copyGraph;
 
-	var Dimension = function Dimension () {};
-
-	var staticAccessors$14 = { P: { configurable: true },L: { configurable: true },A: { configurable: true },FALSE: { configurable: true },TRUE: { configurable: true },DONTCARE: { configurable: true },SYM_FALSE: { configurable: true },SYM_TRUE: { configurable: true },SYM_DONTCARE: { configurable: true },SYM_P: { configurable: true },SYM_L: { configurable: true },SYM_A: { configurable: true } };
-
-	staticAccessors$14.P.get = function () { return 0 };
-	staticAccessors$14.L.get = function () { return 1 };
-	staticAccessors$14.A.get = function () { return 2 };
-	staticAccessors$14.FALSE.get = function () { return -1 };
-	staticAccessors$14.TRUE.get = function () { return -2 };
-	staticAccessors$14.DONTCARE.get = function () { return -3 };
-	staticAccessors$14.SYM_FALSE.get = function () { return 'F' };
-	staticAccessors$14.SYM_TRUE.get = function () { return 'T' };
-	staticAccessors$14.SYM_DONTCARE.get = function () { return '*' };
-	staticAccessors$14.SYM_P.get = function () { return '0' };
-	staticAccessors$14.SYM_L.get = function () { return '1' };
-	staticAccessors$14.SYM_A.get = function () { return '2' };
-
-	Dimension.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Dimension.prototype.getClass = function getClass () {
-	  return Dimension
-	};
-	Dimension.toDimensionSymbol = function toDimensionSymbol (dimensionValue) {
-	  switch (dimensionValue) {
-	    case Dimension.FALSE:
-	      return Dimension.SYM_FALSE
-	    case Dimension.TRUE:
-	      return Dimension.SYM_TRUE
-	    case Dimension.DONTCARE:
-	      return Dimension.SYM_DONTCARE
-	    case Dimension.P:
-	      return Dimension.SYM_P
-	    case Dimension.L:
-	      return Dimension.SYM_L
-	    case Dimension.A:
-	      return Dimension.SYM_A
-	  }
-	  throw new IllegalArgumentException('Unknown dimension value: ' + dimensionValue)
-	};
-	Dimension.toDimensionValue = function toDimensionValue (dimensionSymbol) {
-	  switch (Character.toUpperCase(dimensionSymbol)) {
-	    case Dimension.SYM_FALSE:
-	      return Dimension.FALSE
-	    case Dimension.SYM_TRUE:
-	      return Dimension.TRUE
-	    case Dimension.SYM_DONTCARE:
-	      return Dimension.DONTCARE
-	    case Dimension.SYM_P:
-	      return Dimension.P
-	    case Dimension.SYM_L:
-	      return Dimension.L
-	    case Dimension.SYM_A:
-	      return Dimension.A
-	  }
-	  throw new IllegalArgumentException('Unknown dimension symbol: ' + dimensionSymbol)
-	};
+	  context.copyGraph = function () {
+	    return _copyGraph;
+	  };
 
-	Object.defineProperties( Dimension, staticAccessors$14 );
+	  var _copyIDs = [];
 
-	var GeometryFilter = function GeometryFilter () {};
+	  context.copyIDs = function (val) {
+	    if (!arguments.length) return _copyIDs;
+	    _copyIDs = val;
+	    _copyGraph = _history.graph();
+	    return context;
+	  };
 
-	GeometryFilter.prototype.filter = function filter (geom) {};
-	GeometryFilter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryFilter.prototype.getClass = function getClass () {
-	  return GeometryFilter
-	};
+	  var _copyLonLat;
 
-	var CoordinateSequenceFilter = function CoordinateSequenceFilter () {};
+	  context.copyLonLat = function (val) {
+	    if (!arguments.length) return _copyLonLat;
+	    _copyLonLat = val;
+	    return context;
+	  };
+	  /* Background */
 
-	CoordinateSequenceFilter.prototype.filter = function filter (seq, i) {};
-	CoordinateSequenceFilter.prototype.isDone = function isDone () {};
-	CoordinateSequenceFilter.prototype.isGeometryChanged = function isGeometryChanged () {};
-	CoordinateSequenceFilter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateSequenceFilter.prototype.getClass = function getClass () {
-	  return CoordinateSequenceFilter
-	};
 
-	var GeometryCollection = (function (Geometry$$1) {
-	  function GeometryCollection (geometries, factory) {
-	    Geometry$$1.call(this, factory);
-	    this._geometries = geometries || [];
+	  var _background;
 
-	    if (Geometry$$1.hasNullElements(this._geometries)) {
-	      throw new IllegalArgumentException('geometries must not contain null elements')
-	    }
-	  }
+	  context.background = function () {
+	    return _background;
+	  };
+	  /* Features */
 
-	  if ( Geometry$$1 ) { GeometryCollection.__proto__ = Geometry$$1; }
-	  GeometryCollection.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  GeometryCollection.prototype.constructor = GeometryCollection;
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
-	  GeometryCollection.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-	    var this$1 = this;
+	  var _features;
 
-	    var envelope = new Envelope();
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      envelope.expandToInclude(this$1._geometries[i].getEnvelopeInternal());
-	    }
-	    return envelope
+	  context.features = function () {
+	    return _features;
 	  };
-	  GeometryCollection.prototype.getGeometryN = function getGeometryN (n) {
-	    return this._geometries[n]
+
+	  context.hasHiddenConnections = function (id) {
+	    var graph = _history.graph();
+
+	    var entity = graph.entity(id);
+	    return _features.hasHiddenConnections(entity, graph);
 	  };
-	  GeometryCollection.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry$$1.SORTINDEX_GEOMETRYCOLLECTION
+	  /* Photos */
+
+
+	  var _photos;
+
+	  context.photos = function () {
+	    return _photos;
 	  };
-	  GeometryCollection.prototype.getCoordinates = function getCoordinates () {
-	    var this$1 = this;
+	  /* Map */
 
-	    var coordinates = new Array(this.getNumPoints()).fill(null);
-	    var k = -1;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      var childCoordinates = this$1._geometries[i].getCoordinates();
-	      for (var j = 0; j < childCoordinates.length; j++) {
-	        k++;
-	        coordinates[k] = childCoordinates[j];
-	      }
-	    }
-	    return coordinates
+
+	  var _map;
+
+	  context.map = function () {
+	    return _map;
 	  };
-	  GeometryCollection.prototype.getArea = function getArea () {
-	    var this$1 = this;
 
-	    var area = 0.0;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      area += this$1._geometries[i].getArea();
-	    }
-	    return area
+	  context.layers = function () {
+	    return _map.layers();
 	  };
-	  GeometryCollection.prototype.equalsExact = function equalsExact () {
-	    var this$1 = this;
 
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      var otherCollection = other;
-	      if (this._geometries.length !== otherCollection._geometries.length) {
-	        return false
-	      }
-	      for (var i = 0; i < this._geometries.length; i++) {
-	        if (!this$1._geometries[i].equalsExact(otherCollection._geometries[i], tolerance)) {
-	          return false
-	        }
-	      }
-	      return true
-	    } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
+	  context.surface = function () {
+	    return _map.surface;
 	  };
-	  GeometryCollection.prototype.normalize = function normalize () {
-	    var this$1 = this;
 
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      this$1._geometries[i].normalize();
-	    }
-	    Arrays.sort(this._geometries);
+	  context.editableDataEnabled = function () {
+	    return _map.editableDataEnabled();
 	  };
-	  GeometryCollection.prototype.getCoordinate = function getCoordinate () {
-	    if (this.isEmpty()) { return null }
-	    return this._geometries[0].getCoordinate()
+
+	  context.surfaceRect = function () {
+	    return _map.surface.node().getBoundingClientRect();
 	  };
-	  GeometryCollection.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    var this$1 = this;
 
-	    var dimension = Dimension.FALSE;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      dimension = Math.max(dimension, this$1._geometries[i].getBoundaryDimension());
-	    }
-	    return dimension
+	  context.editable = function () {
+	    // don't allow editing during save
+	    var mode = context.mode();
+	    if (!mode || mode.id === 'save') return false;
+	    return _map.editableDataEnabled();
 	  };
-	  GeometryCollection.prototype.getDimension = function getDimension () {
-	    var this$1 = this;
+	  /* Debug */
+
+
+	  var _debugFlags = {
+	    tile: false,
+	    // tile boundaries
+	    collision: false,
+	    // label collision bounding boxes
+	    imagery: false,
+	    // imagery bounding polygons
+	    target: false,
+	    // touch targets
+	    downloaded: false // downloaded data from osm
 
-	    var dimension = Dimension.FALSE;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      dimension = Math.max(dimension, this$1._geometries[i].getDimension());
-	    }
-	    return dimension
 	  };
-	  GeometryCollection.prototype.getLength = function getLength () {
-	    var this$1 = this;
 
-	    var sum = 0.0;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      sum += this$1._geometries[i].getLength();
-	    }
-	    return sum
+	  context.debugFlags = function () {
+	    return _debugFlags;
 	  };
-	  GeometryCollection.prototype.getNumPoints = function getNumPoints () {
-	    var this$1 = this;
 
-	    var numPoints = 0;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      numPoints += this$1._geometries[i].getNumPoints();
-	    }
-	    return numPoints
+	  context.getDebug = function (flag) {
+	    return flag && _debugFlags[flag];
 	  };
-	  GeometryCollection.prototype.getNumGeometries = function getNumGeometries () {
-	    return this._geometries.length
+
+	  context.setDebug = function (flag, val) {
+	    if (arguments.length === 1) val = true;
+	    _debugFlags[flag] = val;
+	    dispatch.call('change');
+	    return context;
 	  };
-	  GeometryCollection.prototype.reverse = function reverse () {
-	    var this$1 = this;
+	  /* Container */
 
-	    var n = this._geometries.length;
-	    var revGeoms = new Array(n).fill(null);
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      revGeoms[i] = this$1._geometries[i].reverse();
-	    }
-	    return this.getFactory().createGeometryCollection(revGeoms)
+
+	  var _container = select(null);
+
+	  context.container = function (val) {
+	    if (!arguments.length) return _container;
+	    _container = val;
+
+	    _container.classed('ideditor', true);
+
+	    return context;
 	  };
-	  GeometryCollection.prototype.compareToSameClass = function compareToSameClass () {
-	    var this$1 = this;
 
-	    if (arguments.length === 1) {
-	      var o = arguments[0];
-	      var theseElements = new TreeSet(Arrays.asList(this._geometries));
-	      var otherElements = new TreeSet(Arrays.asList(o._geometries));
-	      return this.compare(theseElements, otherElements)
-	    } else if (arguments.length === 2) {
-	      var o$1 = arguments[0];
-	      var comp = arguments[1];
-	      var gc = o$1;
-	      var n1 = this.getNumGeometries();
-	      var n2 = gc.getNumGeometries();
-	      var i = 0;
-	      while (i < n1 && i < n2) {
-	        var thisGeom = this$1.getGeometryN(i);
-	        var otherGeom = gc.getGeometryN(i);
-	        var holeComp = thisGeom.compareToSameClass(otherGeom, comp);
-	        if (holeComp !== 0) { return holeComp }
-	        i++;
-	      }
-	      if (i < n1) { return 1 }
-	      if (i < n2) { return -1 }
-	      return 0
-	    }
+	  context.containerNode = function (val) {
+	    if (!arguments.length) return context.container().node();
+	    context.container(select(val));
+	    return context;
 	  };
-	  GeometryCollection.prototype.apply = function apply () {
-	    var this$1 = this;
 
-	    if (hasInterface(arguments[0], CoordinateFilter)) {
-	      var filter = arguments[0];
-	      for (var i = 0; i < this._geometries.length; i++) {
-	        this$1._geometries[i].apply(filter);
-	      }
-	    } else if (hasInterface(arguments[0], CoordinateSequenceFilter)) {
-	      var filter$1 = arguments[0];
-	      if (this._geometries.length === 0) { return null }
-	      for (var i$1 = 0; i$1 < this._geometries.length; i$1++) {
-	        this$1._geometries[i$1].apply(filter$1);
-	        if (filter$1.isDone()) {
-	          break
-	        }
-	      }
-	      if (filter$1.isGeometryChanged()) { this.geometryChanged(); }
-	    } else if (hasInterface(arguments[0], GeometryFilter)) {
-	      var filter$2 = arguments[0];
-	      filter$2.filter(this);
-	      for (var i$2 = 0; i$2 < this._geometries.length; i$2++) {
-	        this$1._geometries[i$2].apply(filter$2);
-	      }
-	    } else if (hasInterface(arguments[0], GeometryComponentFilter)) {
-	      var filter$3 = arguments[0];
-	      filter$3.filter(this);
-	      for (var i$3 = 0; i$3 < this._geometries.length; i$3++) {
-	        this$1._geometries[i$3].apply(filter$3);
-	      }
-	    }
+	  var _embed;
+
+	  context.embed = function (val) {
+	    if (!arguments.length) return _embed;
+	    _embed = val;
+	    return context;
 	  };
-	  GeometryCollection.prototype.getBoundary = function getBoundary () {
-	    this.checkNotGeometryCollection(this);
-	    Assert.shouldNeverReachHere();
-	    return null
+	  /* Assets */
+
+
+	  var _assetPath = '';
+
+	  context.assetPath = function (val) {
+	    if (!arguments.length) return _assetPath;
+	    _assetPath = val;
+	    _mainFileFetcher.assetPath(val);
+	    return context;
 	  };
-	  GeometryCollection.prototype.clone = function clone () {
-	    var this$1 = this;
 
-	    var gc = Geometry$$1.prototype.clone.call(this);
-	    gc._geometries = new Array(this._geometries.length).fill(null);
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      gc._geometries[i] = this$1._geometries[i].clone();
-	    }
-	    return gc
+	  var _assetMap = {};
+
+	  context.assetMap = function (val) {
+	    if (!arguments.length) return _assetMap;
+	    _assetMap = val;
+	    _mainFileFetcher.assetMap(val);
+	    return context;
 	  };
-	  GeometryCollection.prototype.getGeometryType = function getGeometryType () {
-	    return 'GeometryCollection'
+
+	  context.asset = function (val) {
+	    if (/^http(s)?:\/\//i.test(val)) return val;
+	    var filename = _assetPath + val;
+	    return _assetMap[filename] || filename;
 	  };
-	  GeometryCollection.prototype.copy = function copy () {
-	    var this$1 = this;
 
-	    var geometries = new Array(this._geometries.length).fill(null);
-	    for (var i = 0; i < geometries.length; i++) {
-	      geometries[i] = this$1._geometries[i].copy();
-	    }
-	    return new GeometryCollection(geometries, this._factory)
+	  context.imagePath = function (val) {
+	    return context.asset("img/".concat(val));
 	  };
-	  GeometryCollection.prototype.isEmpty = function isEmpty () {
-	    var this$1 = this;
+	  /* reset (aka flush) */
+
+
+	  context.reset = context.flush = function () {
+	    context.debouncedSave.cancel();
+	    Array.from(_deferred).forEach(function (handle) {
+	      window.cancelIdleCallback(handle);
 
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      if (!this$1._geometries[i].isEmpty()) {
-	        return false
+	      _deferred["delete"](handle);
+	    });
+	    Object.values(services).forEach(function (service) {
+	      if (service && typeof service.reset === 'function') {
+	        service.reset(context);
 	      }
-	    }
-	    return true
-	  };
-	  GeometryCollection.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  GeometryCollection.prototype.getClass = function getClass () {
-	    return GeometryCollection
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return -5694727726395021467 };
+	    });
+	    context.changeset = null;
 
-	  Object.defineProperties( GeometryCollection, staticAccessors );
+	    _validator.reset();
 
-	  return GeometryCollection;
-	}(Geometry));
+	    _features.reset();
 
-	var MultiLineString = (function (GeometryCollection$$1) {
-	  function MultiLineString () {
-	    GeometryCollection$$1.apply(this, arguments);
-	  }
+	    _history.reset();
 
-	  if ( GeometryCollection$$1 ) { MultiLineString.__proto__ = GeometryCollection$$1; }
-	  MultiLineString.prototype = Object.create( GeometryCollection$$1 && GeometryCollection$$1.prototype );
-	  MultiLineString.prototype.constructor = MultiLineString;
+	    _uploader.reset(); // don't leave stale state in the inspector
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
 
-	  MultiLineString.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry.SORTINDEX_MULTILINESTRING
+	    context.container().select('.inspector-wrap *').remove();
+	    return context;
 	  };
-	  MultiLineString.prototype.equalsExact = function equalsExact () {
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
+	  /* Projections */
+
+
+	  context.projection = geoRawMercator();
+	  context.curtainProjection = geoRawMercator();
+	  /* Init */
+
+	  context.init = function () {
+	    instantiateInternal();
+	    initializeDependents();
+	    return context; // Load variables and properties. No property of `context` should be accessed
+	    // until this is complete since load statuses are indeterminate. The order
+	    // of instantiation shouldn't matter.
+
+	    function instantiateInternal() {
+	      _history = coreHistory(context);
+	      context.graph = _history.graph;
+	      context.pauseChangeDispatch = _history.pauseChangeDispatch;
+	      context.resumeChangeDispatch = _history.resumeChangeDispatch;
+	      context.perform = withDebouncedSave(_history.perform);
+	      context.replace = withDebouncedSave(_history.replace);
+	      context.pop = withDebouncedSave(_history.pop);
+	      context.overwrite = withDebouncedSave(_history.overwrite);
+	      context.undo = withDebouncedSave(_history.undo);
+	      context.redo = withDebouncedSave(_history.redo);
+	      _validator = coreValidator(context);
+	      _uploader = coreUploader(context);
+	      _background = rendererBackground(context);
+	      _features = rendererFeatures(context);
+	      _map = rendererMap(context);
+	      _photos = rendererPhotos(context);
+	      _ui = uiInit(context);
+	    } // Set up objects that might need to access properties of `context`. The order
+	    // might matter if dependents make calls to each other. Be wary of async calls.
+
+
+	    function initializeDependents() {
+	      if (context.initialHashParams.presets) {
+	        _mainPresetIndex.addablePresetIDs(new Set(context.initialHashParams.presets.split(',')));
 	      }
-	      return GeometryCollection$$1.prototype.equalsExact.call(this, other, tolerance)
-	    } else { return GeometryCollection$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  MultiLineString.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    if (this.isClosed()) {
-	      return Dimension.FALSE
-	    }
-	    return 0
-	  };
-	  MultiLineString.prototype.isClosed = function isClosed () {
-	    var this$1 = this;
 
-	    if (this.isEmpty()) {
-	      return false
-	    }
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      if (!this$1._geometries[i].isClosed()) {
-	        return false
+	      if (context.initialHashParams.locale) {
+	        _mainLocalizer.preferredLocaleCodes(context.initialHashParams.locale);
+	      } // kick off some async work
+
+
+	      _mainLocalizer.ensureLoaded();
+
+	      _background.ensureLoaded();
+
+	      _mainPresetIndex.ensureLoaded();
+	      Object.values(services).forEach(function (service) {
+	        if (service && typeof service.init === 'function') {
+	          service.init();
+	        }
+	      });
+
+	      _map.init();
+
+	      _validator.init();
+
+	      _features.init();
+
+	      if (services.maprules && context.initialHashParams.maprules) {
+	        d3_json(context.initialHashParams.maprules).then(function (mapcss) {
+	          services.maprules.init();
+	          mapcss.forEach(function (mapcssSelector) {
+	            return services.maprules.addRule(mapcssSelector);
+	          });
+	        })["catch"](function () {
+	          /* ignore */
+	        });
+	      } // if the container isn't available, e.g. when testing, don't load the UI
+
+
+	      if (!context.container().empty()) {
+	        _ui.ensureLoaded().then(function () {
+	          _photos.init();
+	        });
 	      }
 	    }
-	    return true
 	  };
-	  MultiLineString.prototype.getDimension = function getDimension () {
-	    return 1
-	  };
-	  MultiLineString.prototype.reverse = function reverse () {
-	    var this$1 = this;
 
-	    var nLines = this._geometries.length;
-	    var revLines = new Array(nLines).fill(null);
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      revLines[nLines - 1 - i] = this$1._geometries[i].reverse();
-	    }
-	    return this.getFactory().createMultiLineString(revLines)
-	  };
-	  MultiLineString.prototype.getBoundary = function getBoundary () {
-	    return new BoundaryOp(this).getBoundary()
-	  };
-	  MultiLineString.prototype.getGeometryType = function getGeometryType () {
-	    return 'MultiLineString'
-	  };
-	  MultiLineString.prototype.copy = function copy () {
-	    var this$1 = this;
+	  return context;
+	}
 
-	    var lineStrings = new Array(this._geometries.length).fill(null);
-	    for (var i = 0; i < lineStrings.length; i++) {
-	      lineStrings[i] = this$1._geometries[i].copy();
-	    }
-	    return new MultiLineString(lineStrings, this._factory)
-	  };
-	  MultiLineString.prototype.interfaces_ = function interfaces_ () {
-	    return [Lineal]
-	  };
-	  MultiLineString.prototype.getClass = function getClass () {
-	    return MultiLineString
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return 8166665132445433741 };
+	// NSI contains the most correct tagging for many commonly mapped features.
+	// See https://github.com/osmlab/name-suggestion-index  and  https://nsi.guide
+	// DATA
 
-	  Object.defineProperties( MultiLineString, staticAccessors );
+	var _nsiStatus = 'loading'; // 'loading', 'ok', 'failed'
 
-	  return MultiLineString;
-	}(GeometryCollection));
+	var _nsi = {}; // Sometimes we can upgrade a feature tagged like `building=yes` to a better tag.
 
-	var BoundaryOp = function BoundaryOp () {
-	  this._geom = null;
-	  this._geomFact = null;
-	  this._bnRule = null;
-	  this._endpointMap = null;
-	  if (arguments.length === 1) {
-	    var geom = arguments[0];
-	    var bnRule = BoundaryNodeRule.MOD2_BOUNDARY_RULE;
-	    this._geom = geom;
-	    this._geomFact = geom.getFactory();
-	    this._bnRule = bnRule;
-	  } else if (arguments.length === 2) {
-	    var geom$1 = arguments[0];
-	    var bnRule$1 = arguments[1];
-	    this._geom = geom$1;
-	    this._geomFact = geom$1.getFactory();
-	    this._bnRule = bnRule$1;
-	  }
-	};
-	BoundaryOp.prototype.boundaryMultiLineString = function boundaryMultiLineString (mLine) {
-	  if (this._geom.isEmpty()) {
-	    return this.getEmptyMultiPoint()
-	  }
-	  var bdyPts = this.computeBoundaryCoordinates(mLine);
-	  if (bdyPts.length === 1) {
-	    return this._geomFact.createPoint(bdyPts[0])
-	  }
-	  return this._geomFact.createMultiPointFromCoords(bdyPts)
-	};
-	BoundaryOp.prototype.getBoundary = function getBoundary () {
-	  if (this._geom instanceof LineString) { return this.boundaryLineString(this._geom) }
-	  if (this._geom instanceof MultiLineString) { return this.boundaryMultiLineString(this._geom) }
-	  return this._geom.getBoundary()
-	};
-	BoundaryOp.prototype.boundaryLineString = function boundaryLineString (line) {
-	  if (this._geom.isEmpty()) {
-	    return this.getEmptyMultiPoint()
-	  }
-	  if (line.isClosed()) {
-	    var closedEndpointOnBoundary = this._bnRule.isInBoundary(2);
-	    if (closedEndpointOnBoundary) {
-	      return line.getStartPoint()
-	    } else {
-	      return this._geomFact.createMultiPoint()
-	    }
-	  }
-	  return this._geomFact.createMultiPoint([line.getStartPoint(), line.getEndPoint()])
-	};
-	BoundaryOp.prototype.getEmptyMultiPoint = function getEmptyMultiPoint () {
-	  return this._geomFact.createMultiPoint()
-	};
-	BoundaryOp.prototype.computeBoundaryCoordinates = function computeBoundaryCoordinates (mLine) {
-	    var this$1 = this;
-
-	  var bdyPts = new ArrayList();
-	  this._endpointMap = new TreeMap();
-	  for (var i = 0; i < mLine.getNumGeometries(); i++) {
-	    var line = mLine.getGeometryN(i);
-	    if (line.getNumPoints() === 0) { continue }
-	    this$1.addEndpoint(line.getCoordinateN(0));
-	    this$1.addEndpoint(line.getCoordinateN(line.getNumPoints() - 1));
-	  }
-	  for (var it = this._endpointMap.entrySet().iterator(); it.hasNext();) {
-	    var entry = it.next();
-	    var counter = entry.getValue();
-	    var valence = counter.count;
-	    if (this$1._bnRule.isInBoundary(valence)) {
-	      bdyPts.add(entry.getKey());
-	    }
-	  }
-	  return CoordinateArrays.toCoordinateArray(bdyPts)
-	};
-	BoundaryOp.prototype.addEndpoint = function addEndpoint (pt) {
-	  var counter = this._endpointMap.get(pt);
-	  if (counter === null) {
-	    counter = new Counter();
-	    this._endpointMap.put(pt, counter);
-	  }
-	  counter.count++;
-	};
-	BoundaryOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BoundaryOp.prototype.getClass = function getClass () {
-	  return BoundaryOp
-	};
-	BoundaryOp.getBoundary = function getBoundary () {
-	  if (arguments.length === 1) {
-	    var g = arguments[0];
-	    var bop = new BoundaryOp(g);
-	    return bop.getBoundary()
-	  } else if (arguments.length === 2) {
-	    var g$1 = arguments[0];
-	    var bnRule = arguments[1];
-	    var bop$1 = new BoundaryOp(g$1, bnRule);
-	    return bop$1.getBoundary()
-	  }
-	};
+	var buildingPreset = {
+	  'building/commercial': true,
+	  'building/government': true,
+	  'building/hotel': true,
+	  'building/retail': true,
+	  'building/office': true,
+	  'building/supermarket': true,
+	  'building/yes': true
+	}; // Exceptions to the namelike regexes.
+	// Usually a tag suffix contains a language code like `name:en`, `name:ru`
+	// but we want to exclude things like `operator:type`, `name:etymology`, etc..
 
-	var Counter = function Counter () {
-	  this.count = null;
-	};
-	Counter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Counter.prototype.getClass = function getClass () {
-	  return Counter
-	};
+	var notNames = /:(colou?r|type|forward|backward|left|right|etymology|pronunciation|wikipedia)$/i; // Exceptions to the branchlike regexes
 
-	// boundary
+	var notBranches = /(coop|express|wireless|factory|outlet)/i; // PRIVATE FUNCTIONS
+	// `setNsiSources()`
+	// Adds the sources to iD's filemap so we can start downloading data.
+	//
 
-	function PrintStream () {}
+	function setNsiSources() {
+	  var nsiVersion = packageJSON.devDependencies['name-suggestion-index'];
+	  var v = parseVersion(nsiVersion);
+	  var vMinor = "".concat(v.major, ".").concat(v.minor);
+	  var sources = {
+	    'nsi_data': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/nsi.min.json"),
+	    'nsi_dissolved': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/dissolved.min.json"),
+	    'nsi_features': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/featureCollection.min.json"),
+	    'nsi_generics': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/genericWords.min.json"),
+	    'nsi_presets': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/presets/nsi-id-presets.min.json"),
+	    'nsi_replacements': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/replacements.min.json"),
+	    'nsi_trees': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/trees.min.json")
+	  };
+	  var fileMap = _mainFileFetcher.fileMap();
+
+	  for (var k in sources) {
+	    if (!fileMap[k]) fileMap[k] = sources[k];
+	  }
+	} // `loadNsiPresets()`
+	//  Returns a Promise fulfilled when the presets have been downloaded and merged into iD.
+	//
 
-	function StringReader () {}
 
-	var DecimalFormat = function DecimalFormat () {};
+	function loadNsiPresets() {
+	  return Promise.all([_mainFileFetcher.get('nsi_presets'), _mainFileFetcher.get('nsi_features')]).then(function (vals) {
+	    // Add `suggestion=true` to all the nsi presets
+	    // The preset json schema doesn't include it, but the iD code still uses it
+	    Object.values(vals[0].presets).forEach(function (preset) {
+	      return preset.suggestion = true;
+	    });
+	    _mainPresetIndex.merge({
+	      presets: vals[0].presets,
+	      featureCollection: vals[1]
+	    });
+	  });
+	} // `loadNsiData()`
+	//  Returns a Promise fulfilled when the other data have been downloaded and processed
+	//
 
-	function ByteArrayOutputStream () {}
 
-	function IOException () {}
+	function loadNsiData() {
+	  return Promise.all([_mainFileFetcher.get('nsi_data'), _mainFileFetcher.get('nsi_dissolved'), _mainFileFetcher.get('nsi_replacements'), _mainFileFetcher.get('nsi_trees')]).then(function (vals) {
+	    _nsi = {
+	      data: vals[0].nsi,
+	      // the raw name-suggestion-index data
+	      dissolved: vals[1].dissolved,
+	      // list of dissolved items
+	      replacements: vals[2].replacements,
+	      // trivial old->new qid replacements
+	      trees: vals[3].trees,
+	      // metadata about trees, main tags
+	      kvt: new Map(),
+	      // Map (k -> Map (v -> t) )
+	      qids: new Map(),
+	      // Map (wd/wp tag values -> qids)
+	      ids: new Map() // Map (id -> NSI item)
 
-	function LineNumberReader () {}
+	    };
+	    _nsi.matcher = new Matcher();
 
-	var StringUtil = function StringUtil () {};
+	    _nsi.matcher.buildMatchIndex(_nsi.data);
 
-	var staticAccessors$15 = { NEWLINE: { configurable: true },SIMPLE_ORDINATE_FORMAT: { configurable: true } };
+	    _nsi.matcher.buildLocationIndex(_nsi.data, _mainLocations.loco());
 
-	StringUtil.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	StringUtil.prototype.getClass = function getClass () {
-	  return StringUtil
-	};
-	StringUtil.chars = function chars (c, n) {
-	  var ch = new Array(n).fill(null);
-	  for (var i = 0; i < n; i++) {
-	    ch[i] = c;
-	  }
-	  return String(ch)
-	};
-	StringUtil.getStackTrace = function getStackTrace () {
-	  if (arguments.length === 1) {
-	    var t = arguments[0];
-	    var os = new ByteArrayOutputStream();
-	    var ps = new PrintStream(os);
-	    t.printStackTrace(ps);
-	    return os.toString()
-	  } else if (arguments.length === 2) {
-	    var t$1 = arguments[0];
-	    var depth = arguments[1];
-	    var stackTrace = '';
-	    var stringReader = new StringReader(StringUtil.getStackTrace(t$1));
-	    var lineNumberReader = new LineNumberReader(stringReader);
-	    for (var i = 0; i < depth; i++) {
-	      try {
-	        stackTrace += lineNumberReader.readLine() + StringUtil.NEWLINE;
-	      } catch (e) {
-	        if (e instanceof IOException) {
-	          Assert.shouldNeverReachHere();
-	        } else { throw e }
-	      } finally {}
-	    }
-	    return stackTrace
-	  }
-	};
-	StringUtil.split = function split (s, separator) {
-	  var separatorlen = separator.length;
-	  var tokenList = new ArrayList();
-	  var tmpString = '' + s;
-	  var pos = tmpString.indexOf(separator);
-	  while (pos >= 0) {
-	    var token = tmpString.substring(0, pos);
-	    tokenList.add(token);
-	    tmpString = tmpString.substring(pos + separatorlen);
-	    pos = tmpString.indexOf(separator);
-	  }
-	  if (tmpString.length > 0) { tokenList.add(tmpString); }
-	  var res = new Array(tokenList.size()).fill(null);
-	  for (var i = 0; i < res.length; i++) {
-	    res[i] = tokenList.get(i);
-	  }
-	  return res
-	};
-	StringUtil.toString = function toString () {
-	  if (arguments.length === 1) {
-	    var d = arguments[0];
-	    return StringUtil.SIMPLE_ORDINATE_FORMAT.format(d)
-	  }
-	};
-	StringUtil.spaces = function spaces (n) {
-	  return StringUtil.chars(' ', n)
-	};
-	staticAccessors$15.NEWLINE.get = function () { return System.getProperty('line.separator') };
-	staticAccessors$15.SIMPLE_ORDINATE_FORMAT.get = function () { return new DecimalFormat('0.#') };
+	    Object.keys(_nsi.data).forEach(function (tkv) {
+	      var category = _nsi.data[tkv];
+	      var parts = tkv.split('/', 3); // tkv = "tree/key/value"
 
-	Object.defineProperties( StringUtil, staticAccessors$15 );
+	      var t = parts[0];
+	      var k = parts[1];
+	      var v = parts[2]; // Build a reverse index of keys -> values -> trees present in the name-suggestion-index
+	      // Collect primary keys  (e.g. "amenity", "craft", "shop", "man_made", "route", etc)
+	      // "amenity": {
+	      //   "restaurant": "brands"
+	      // }
 
-	var CoordinateSequences = function CoordinateSequences () {};
+	      var vmap = _nsi.kvt.get(k);
 
-	CoordinateSequences.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateSequences.prototype.getClass = function getClass () {
-	  return CoordinateSequences
-	};
-	CoordinateSequences.copyCoord = function copyCoord (src, srcPos, dest, destPos) {
-	  var minDim = Math.min(src.getDimension(), dest.getDimension());
-	  for (var dim = 0; dim < minDim; dim++) {
-	    dest.setOrdinate(destPos, dim, src.getOrdinate(srcPos, dim));
-	  }
-	};
-	CoordinateSequences.isRing = function isRing (seq) {
-	  var n = seq.size();
-	  if (n === 0) { return true }
-	  if (n <= 3) { return false }
-	  return seq.getOrdinate(0, CoordinateSequence.X) === seq.getOrdinate(n - 1, CoordinateSequence.X) && seq.getOrdinate(0, CoordinateSequence.Y) === seq.getOrdinate(n - 1, CoordinateSequence.Y)
-	};
-	CoordinateSequences.isEqual = function isEqual (cs1, cs2) {
-	  var cs1Size = cs1.size();
-	  var cs2Size = cs2.size();
-	  if (cs1Size !== cs2Size) { return false }
-	  var dim = Math.min(cs1.getDimension(), cs2.getDimension());
-	  for (var i = 0; i < cs1Size; i++) {
-	    for (var d = 0; d < dim; d++) {
-	      var v1 = cs1.getOrdinate(i, d);
-	      var v2 = cs2.getOrdinate(i, d);
-	      if (cs1.getOrdinate(i, d) === cs2.getOrdinate(i, d)) { continue }
-	      if (Double.isNaN(v1) && Double.isNaN(v2)) { continue }
-	      return false
-	    }
-	  }
-	  return true
-	};
-	CoordinateSequences.extend = function extend (fact, seq, size) {
-	  var newseq = fact.create(size, seq.getDimension());
-	  var n = seq.size();
-	  CoordinateSequences.copy(seq, 0, newseq, 0, n);
-	  if (n > 0) {
-	    for (var i = n; i < size; i++) { CoordinateSequences.copy(seq, n - 1, newseq, i, 1); }
-	  }
-	  return newseq
-	};
-	CoordinateSequences.reverse = function reverse (seq) {
-	  var last = seq.size() - 1;
-	  var mid = Math.trunc(last / 2);
-	  for (var i = 0; i <= mid; i++) {
-	    CoordinateSequences.swap(seq, i, last - i);
-	  }
-	};
-	CoordinateSequences.swap = function swap (seq, i, j) {
-	  if (i === j) { return null }
-	  for (var dim = 0; dim < seq.getDimension(); dim++) {
-	    var tmp = seq.getOrdinate(i, dim);
-	    seq.setOrdinate(i, dim, seq.getOrdinate(j, dim));
-	    seq.setOrdinate(j, dim, tmp);
-	  }
-	};
-	CoordinateSequences.copy = function copy (src, srcPos, dest, destPos, length) {
-	  for (var i = 0; i < length; i++) {
-	    CoordinateSequences.copyCoord(src, srcPos + i, dest, destPos + i);
-	  }
-	};
-	CoordinateSequences.toString = function toString () {
-	  if (arguments.length === 1) {
-	    var cs = arguments[0];
-	    var size = cs.size();
-	    if (size === 0) { return '()' }
-	    var dim = cs.getDimension();
-	    var buf = new StringBuffer();
-	    buf.append('(');
-	    for (var i = 0; i < size; i++) {
-	      if (i > 0) { buf.append(' '); }
-	      for (var d = 0; d < dim; d++) {
-	        if (d > 0) { buf.append(','); }
-	        buf.append(StringUtil.toString(cs.getOrdinate(i, d)));
-	      }
-	    }
-	    buf.append(')');
-	    return buf.toString()
-	  }
-	};
-	CoordinateSequences.ensureValidRing = function ensureValidRing (fact, seq) {
-	  var n = seq.size();
-	  if (n === 0) { return seq }
-	  if (n <= 3) { return CoordinateSequences.createClosedRing(fact, seq, 4) }
-	  var isClosed = seq.getOrdinate(0, CoordinateSequence.X) === seq.getOrdinate(n - 1, CoordinateSequence.X) && seq.getOrdinate(0, CoordinateSequence.Y) === seq.getOrdinate(n - 1, CoordinateSequence.Y);
-	  if (isClosed) { return seq }
-	  return CoordinateSequences.createClosedRing(fact, seq, n + 1)
-	};
-	CoordinateSequences.createClosedRing = function createClosedRing (fact, seq, size) {
-	  var newseq = fact.create(size, seq.getDimension());
-	  var n = seq.size();
-	  CoordinateSequences.copy(seq, 0, newseq, 0, n);
-	  for (var i = n; i < size; i++) { CoordinateSequences.copy(seq, 0, newseq, i, 1); }
-	  return newseq
-	};
+	      if (!vmap) {
+	        vmap = new Map();
 
-	var LineString = (function (Geometry$$1) {
-	  function LineString (points, factory) {
-	    Geometry$$1.call(this, factory);
-	    this._points = null;
-	    this.init(points);
-	  }
+	        _nsi.kvt.set(k, vmap);
+	      }
 
-	  if ( Geometry$$1 ) { LineString.__proto__ = Geometry$$1; }
-	  LineString.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  LineString.prototype.constructor = LineString;
+	      vmap.set(v, t);
+	      var tree = _nsi.trees[t]; // e.g. "brands", "operators"
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
-	  LineString.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-	    if (this.isEmpty()) {
-	      return new Envelope()
-	    }
-	    return this._points.expandEnvelope(new Envelope())
-	  };
-	  LineString.prototype.isRing = function isRing () {
-	    return this.isClosed() && this.isSimple()
-	  };
-	  LineString.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry$$1.SORTINDEX_LINESTRING
-	  };
-	  LineString.prototype.getCoordinates = function getCoordinates () {
-	    return this._points.toCoordinateArray()
-	  };
-	  LineString.prototype.equalsExact = function equalsExact () {
-	    var this$1 = this;
+	      var mainTag = tree.mainTag; // e.g. "brand:wikidata", "operator:wikidata", etc
 
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      var otherLineString = other;
-	      if (this._points.size() !== otherLineString._points.size()) {
-	        return false
-	      }
-	      for (var i = 0; i < this._points.size(); i++) {
-	        if (!this$1.equal(this$1._points.getCoordinate(i), otherLineString._points.getCoordinate(i), tolerance)) {
-	          return false
-	        }
-	      }
-	      return true
-	    } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  LineString.prototype.normalize = function normalize () {
-	    var this$1 = this;
+	      var items = category.items || [];
+	      items.forEach(function (item) {
+	        // Remember some useful things for later, cache NSI id -> item
+	        item.tkv = tkv;
+	        item.mainTag = mainTag;
 
-	    for (var i = 0; i < Math.trunc(this._points.size() / 2); i++) {
-	      var j = this$1._points.size() - 1 - i;
-	      if (!this$1._points.getCoordinate(i).equals(this$1._points.getCoordinate(j))) {
-	        if (this$1._points.getCoordinate(i).compareTo(this$1._points.getCoordinate(j)) > 0) {
-	          CoordinateSequences.reverse(this$1._points);
-	        }
-	        return null
-	      }
-	    }
-	  };
-	  LineString.prototype.getCoordinate = function getCoordinate () {
-	    if (this.isEmpty()) { return null }
-	    return this._points.getCoordinate(0)
-	  };
-	  LineString.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    if (this.isClosed()) {
-	      return Dimension.FALSE
-	    }
-	    return 0
-	  };
-	  LineString.prototype.isClosed = function isClosed () {
-	    if (this.isEmpty()) {
-	      return false
-	    }
-	    return this.getCoordinateN(0).equals2D(this.getCoordinateN(this.getNumPoints() - 1))
-	  };
-	  LineString.prototype.getEndPoint = function getEndPoint () {
-	    if (this.isEmpty()) {
-	      return null
-	    }
-	    return this.getPointN(this.getNumPoints() - 1)
-	  };
-	  LineString.prototype.getDimension = function getDimension () {
-	    return 1
-	  };
-	  LineString.prototype.getLength = function getLength () {
-	    return CGAlgorithms.computeLength(this._points)
-	  };
-	  LineString.prototype.getNumPoints = function getNumPoints () {
-	    return this._points.size()
-	  };
-	  LineString.prototype.reverse = function reverse () {
-	    var seq = this._points.copy();
-	    CoordinateSequences.reverse(seq);
-	    var revLine = this.getFactory().createLineString(seq);
-	    return revLine
-	  };
-	  LineString.prototype.compareToSameClass = function compareToSameClass () {
-	    var this$1 = this;
+	        _nsi.ids.set(item.id, item); // Cache Wikidata/Wikipedia values -> qid, for #6416
 
-	    if (arguments.length === 1) {
-	      var o = arguments[0];
-	      var line = o;
-	      var i = 0;
-	      var j = 0;
-	      while (i < this._points.size() && j < line._points.size()) {
-	        var comparison = this$1._points.getCoordinate(i).compareTo(line._points.getCoordinate(j));
-	        if (comparison !== 0) {
-	          return comparison
-	        }
-	        i++;
-	        j++;
-	      }
-	      if (i < this._points.size()) {
-	        return 1
-	      }
-	      if (j < line._points.size()) {
-	        return -1
-	      }
-	      return 0
-	    } else if (arguments.length === 2) {
-	      var o$1 = arguments[0];
-	      var comp = arguments[1];
-	      var line$1 = o$1;
-	      return comp.compare(this._points, line$1._points)
-	    }
-	  };
-	  LineString.prototype.apply = function apply () {
-	    var this$1 = this;
 
-	    if (hasInterface(arguments[0], CoordinateFilter)) {
-	      var filter = arguments[0];
-	      for (var i = 0; i < this._points.size(); i++) {
-	        filter.filter(this$1._points.getCoordinate(i));
-	      }
-	    } else if (hasInterface(arguments[0], CoordinateSequenceFilter)) {
-	      var filter$1 = arguments[0];
-	      if (this._points.size() === 0) { return null }
-	      for (var i$1 = 0; i$1 < this._points.size(); i$1++) {
-	        filter$1.filter(this$1._points, i$1);
-	        if (filter$1.isDone()) { break }
-	      }
-	      if (filter$1.isGeometryChanged()) { this.geometryChanged(); }
-	    } else if (hasInterface(arguments[0], GeometryFilter)) {
-	      var filter$2 = arguments[0];
-	      filter$2.filter(this);
-	    } else if (hasInterface(arguments[0], GeometryComponentFilter)) {
-	      var filter$3 = arguments[0];
-	      filter$3.filter(this);
-	    }
-	  };
-	  LineString.prototype.getBoundary = function getBoundary () {
-	    return new BoundaryOp(this).getBoundary()
-	  };
-	  LineString.prototype.isEquivalentClass = function isEquivalentClass (other) {
-	    return other instanceof LineString
-	  };
-	  LineString.prototype.clone = function clone () {
-	    var ls = Geometry$$1.prototype.clone.call(this);
-	    ls._points = this._points.clone();
-	    return ls
-	  };
-	  LineString.prototype.getCoordinateN = function getCoordinateN (n) {
-	    return this._points.getCoordinate(n)
-	  };
-	  LineString.prototype.getGeometryType = function getGeometryType () {
-	    return 'LineString'
-	  };
-	  LineString.prototype.copy = function copy () {
-	    return new LineString(this._points.copy(), this._factory)
-	  };
-	  LineString.prototype.getCoordinateSequence = function getCoordinateSequence () {
-	    return this._points
-	  };
-	  LineString.prototype.isEmpty = function isEmpty () {
-	    return this._points.size() === 0
-	  };
-	  LineString.prototype.init = function init (points) {
-	    if (points === null) {
-	      points = this.getFactory().getCoordinateSequenceFactory().create([]);
-	    }
-	    if (points.size() === 1) {
-	      throw new IllegalArgumentException('Invalid number of points in LineString (found ' + points.size() + ' - must be 0 or >= 2)')
-	    }
-	    this._points = points;
-	  };
-	  LineString.prototype.isCoordinate = function isCoordinate (pt) {
-	    var this$1 = this;
+	        var wd = item.tags[mainTag];
+	        var wp = item.tags[mainTag.replace('wikidata', 'wikipedia')];
+	        if (wd) _nsi.qids.set(wd, wd);
+	        if (wp && wd) _nsi.qids.set(wp, wd);
+	      });
+	    });
+	  });
+	} // `gatherKVs()`
+	// Gather all the k/v pairs that we will run through the NSI matcher.
+	// An OSM tags object can contain anything, but only a few tags will be interesting to NSI.
+	//
+	// This function will return the interesting tag pairs like:
+	//   "amenity/restaurant", "man_made/flagpole"
+	// and fallbacks like
+	//   "amenity/yes"
+	// excluding things like
+	//   "tiger:reviewed", "surface", "ref", etc.
+	//
+	// Arguments
+	//   `tags`: `Object` containing the feature's OSM tags
+	// Returns
+	//   `Object` containing kv pairs to test:
+	//   {
+	//     'primary': Set(),
+	//     'alternate': Set()
+	//   }
+	//
 
-	    for (var i = 0; i < this._points.size(); i++) {
-	      if (this$1._points.getCoordinate(i).equals(pt)) {
-	        return true
-	      }
-	    }
-	    return false
-	  };
-	  LineString.prototype.getStartPoint = function getStartPoint () {
-	    if (this.isEmpty()) {
-	      return null
+
+	function gatherKVs(tags) {
+	  var primary = new Set();
+	  var alternate = new Set();
+	  Object.keys(tags).forEach(function (osmkey) {
+	    var osmvalue = tags[osmkey];
+	    if (!osmvalue) return; // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
+
+	    if (osmkey === 'route_master') osmkey = 'route';
+
+	    var vmap = _nsi.kvt.get(osmkey);
+
+	    if (!vmap) return; // not an interesting key
+
+	    if (vmap.get(osmvalue)) {
+	      // Matched a category in NSI
+	      primary.add("".concat(osmkey, "/").concat(osmvalue)); // interesting key/value
+	    } else if (osmvalue === 'yes') {
+	      alternate.add("".concat(osmkey, "/").concat(osmvalue)); // fallback key/yes
 	    }
-	    return this.getPointN(0)
-	  };
-	  LineString.prototype.getPointN = function getPointN (n) {
-	    return this.getFactory().createPoint(this._points.getCoordinate(n))
-	  };
-	  LineString.prototype.interfaces_ = function interfaces_ () {
-	    return [Lineal]
-	  };
-	  LineString.prototype.getClass = function getClass () {
-	    return LineString
+	  }); // Can we try a generic building fallback match? - See #6122, #7197
+	  // Only try this if we do a preset match and find nothing else remarkable about that building.
+	  // For example, a way with `building=yes` + `name=Westfield` may be a Westfield department store.
+	  // But a way with `building=yes` + `name=Westfield` + `public_transport=station` is a train station for a town named "Westfield"
+
+	  var preset = _mainPresetIndex.matchTags(tags, 'area');
+
+	  if (buildingPreset[preset.id]) {
+	    alternate.add('building/yes');
+	  }
+
+	  return {
+	    primary: primary,
+	    alternate: alternate
 	  };
-	  staticAccessors.serialVersionUID.get = function () { return 3110669828065365560 };
+	} // `identifyTree()`
+	// NSI has a concept of trees: "brands", "operators", "flags", "transit".
+	// The tree determines things like which tags are namelike, and which tags hold important wikidata.
+	// This takes an Object of tags and tries to identify what tree to use.
+	//
+	// Arguments
+	//   `tags`: `Object` containing the feature's OSM tags
+	// Returns
+	//   `string` the name of the tree if known
+	//   or 'unknown' if it could match several trees (e.g. amenity/yes)
+	//   or null if no match
+	//
 
-	  Object.defineProperties( LineString, staticAccessors );
 
-	  return LineString;
-	}(Geometry));
+	function identifyTree(tags) {
+	  var unknown;
+	  var t; // Check all tags
 
-	var Puntal = function Puntal () {};
+	  Object.keys(tags).forEach(function (osmkey) {
+	    if (t) return; // found already
 
-	Puntal.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Puntal.prototype.getClass = function getClass () {
-	  return Puntal
-	};
+	    var osmvalue = tags[osmkey];
+	    if (!osmvalue) return; // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
 
-	var Point$1 = (function (Geometry$$1) {
-	  function Point (coordinates, factory) {
-	    Geometry$$1.call(this, factory);
-	    this._coordinates = coordinates || null;
-	    this.init(this._coordinates);
-	  }
+	    if (osmkey === 'route_master') osmkey = 'route';
 
-	  if ( Geometry$$1 ) { Point.__proto__ = Geometry$$1; }
-	  Point.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  Point.prototype.constructor = Point;
+	    var vmap = _nsi.kvt.get(osmkey);
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
-	  Point.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-	    if (this.isEmpty()) {
-	      return new Envelope()
-	    }
-	    var env = new Envelope();
-	    env.expandToInclude(this._coordinates.getX(0), this._coordinates.getY(0));
-	    return env
-	  };
-	  Point.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry$$1.SORTINDEX_POINT
-	  };
-	  Point.prototype.getCoordinates = function getCoordinates () {
-	    return this.isEmpty() ? [] : [this.getCoordinate()]
-	  };
-	  Point.prototype.equalsExact = function equalsExact () {
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      if (this.isEmpty() && other.isEmpty()) {
-	        return true
-	      }
-	      if (this.isEmpty() !== other.isEmpty()) {
-	        return false
-	      }
-	      return this.equal(other.getCoordinate(), this.getCoordinate(), tolerance)
-	    } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  Point.prototype.normalize = function normalize () {};
-	  Point.prototype.getCoordinate = function getCoordinate () {
-	    return this._coordinates.size() !== 0 ? this._coordinates.getCoordinate(0) : null
-	  };
-	  Point.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    return Dimension.FALSE
-	  };
-	  Point.prototype.getDimension = function getDimension () {
-	    return 0
-	  };
-	  Point.prototype.getNumPoints = function getNumPoints () {
-	    return this.isEmpty() ? 0 : 1
-	  };
-	  Point.prototype.reverse = function reverse () {
-	    return this.copy()
-	  };
-	  Point.prototype.getX = function getX () {
-	    if (this.getCoordinate() === null) {
-	      throw new Error('getX called on empty Point')
-	    }
-	    return this.getCoordinate().x
-	  };
-	  Point.prototype.compareToSameClass = function compareToSameClass () {
-	    if (arguments.length === 1) {
-	      var other = arguments[0];
-	      var point$1 = other;
-	      return this.getCoordinate().compareTo(point$1.getCoordinate())
-	    } else if (arguments.length === 2) {
-	      var other$1 = arguments[0];
-	      var comp = arguments[1];
-	      var point = other$1;
-	      return comp.compare(this._coordinates, point._coordinates)
-	    }
-	  };
-	  Point.prototype.apply = function apply () {
-	    if (hasInterface(arguments[0], CoordinateFilter)) {
-	      var filter = arguments[0];
-	      if (this.isEmpty()) {
-	        return null
-	      }
-	      filter.filter(this.getCoordinate());
-	    } else if (hasInterface(arguments[0], CoordinateSequenceFilter)) {
-	      var filter$1 = arguments[0];
-	      if (this.isEmpty()) { return null }
-	      filter$1.filter(this._coordinates, 0);
-	      if (filter$1.isGeometryChanged()) { this.geometryChanged(); }
-	    } else if (hasInterface(arguments[0], GeometryFilter)) {
-	      var filter$2 = arguments[0];
-	      filter$2.filter(this);
-	    } else if (hasInterface(arguments[0], GeometryComponentFilter)) {
-	      var filter$3 = arguments[0];
-	      filter$3.filter(this);
-	    }
-	  };
-	  Point.prototype.getBoundary = function getBoundary () {
-	    return this.getFactory().createGeometryCollection(null)
-	  };
-	  Point.prototype.clone = function clone () {
-	    var p = Geometry$$1.prototype.clone.call(this);
-	    p._coordinates = this._coordinates.clone();
-	    return p
-	  };
-	  Point.prototype.getGeometryType = function getGeometryType () {
-	    return 'Point'
-	  };
-	  Point.prototype.copy = function copy () {
-	    return new Point(this._coordinates.copy(), this._factory)
-	  };
-	  Point.prototype.getCoordinateSequence = function getCoordinateSequence () {
-	    return this._coordinates
-	  };
-	  Point.prototype.getY = function getY () {
-	    if (this.getCoordinate() === null) {
-	      throw new Error('getY called on empty Point')
-	    }
-	    return this.getCoordinate().y
-	  };
-	  Point.prototype.isEmpty = function isEmpty () {
-	    return this._coordinates.size() === 0
-	  };
-	  Point.prototype.init = function init (coordinates) {
-	    if (coordinates === null) {
-	      coordinates = this.getFactory().getCoordinateSequenceFactory().create([]);
+	    if (!vmap) return; // this key is not in nsi
+
+	    if (osmvalue === 'yes') {
+	      unknown = 'unknown';
+	    } else {
+	      t = vmap.get(osmvalue);
 	    }
-	    Assert.isTrue(coordinates.size() <= 1);
-	    this._coordinates = coordinates;
-	  };
-	  Point.prototype.isSimple = function isSimple () {
-	    return true
-	  };
-	  Point.prototype.interfaces_ = function interfaces_ () {
-	    return [Puntal]
-	  };
-	  Point.prototype.getClass = function getClass () {
-	    return Point
+	  });
+	  return t || unknown || null;
+	} // `gatherNames()`
+	// Gather all the namelike values that we will run through the NSI matcher.
+	// It will gather values primarily from tags `name`, `name:ru`, `flag:name`
+	//  and fallback to alternate tags like `brand`, `brand:ru`, `alt_name`
+	//
+	// Arguments
+	//   `tags`: `Object` containing the feature's OSM tags
+	// Returns
+	//   `Object` containing namelike values to test:
+	//   {
+	//     'primary': Set(),
+	//     'fallbacks': Set()
+	//   }
+	//
+
+
+	function gatherNames(tags) {
+	  var empty = {
+	    primary: new Set(),
+	    alternate: new Set()
 	  };
-	  staticAccessors.serialVersionUID.get = function () { return 4902022702746614570 };
+	  var primary = new Set();
+	  var alternate = new Set();
+	  var foundSemi = false;
+	  var testNameFragments = false;
+	  var patterns; // Patterns for matching OSM keys that might contain namelike values.
+	  // These roughly correspond to the "trees" concept in name-suggestion-index,
 
-	  Object.defineProperties( Point, staticAccessors );
+	  var t = identifyTree(tags);
+	  if (!t) return empty;
 
-	  return Point;
-	}(Geometry));
+	  if (t === 'transit') {
+	    patterns = {
+	      primary: /^network$/i,
+	      alternate: /^(operator|operator:\w+|network:\w+|\w+_name|\w+_name:\w+)$/i
+	    };
+	  } else if (t === 'flags') {
+	    patterns = {
+	      primary: /^(flag:name|flag:name:\w+)$/i,
+	      alternate: /^(flag|flag:\w+|subject|subject:\w+)$/i // note: no `country`, we special-case it below
 
-	var Polygonal = function Polygonal () {};
+	    };
+	  } else if (t === 'brands') {
+	    testNameFragments = true;
+	    patterns = {
+	      primary: /^(name|name:\w+)$/i,
+	      alternate: /^(brand|brand:\w+|operator|operator:\w+|\w+_name|\w+_name:\w+)/i
+	    };
+	  } else if (t === 'operators') {
+	    testNameFragments = true;
+	    patterns = {
+	      primary: /^(name|name:\w+|operator|operator:\w+)$/i,
+	      alternate: /^(brand|brand:\w+|\w+_name|\w+_name:\w+)/i
+	    };
+	  } else {
+	    // unknown/multiple
+	    testNameFragments = true;
+	    patterns = {
+	      primary: /^(name|name:\w+)$/i,
+	      alternate: /^(brand|brand:\w+|network|network:\w+|operator|operator:\w+|\w+_name|\w+_name:\w+)/i
+	    };
+	  } // Test `name` fragments, longest to shortest, to fit them into a "Name Branch" pattern.
+	  // e.g. "TUI ReiseCenter - Neuss Innenstadt" -> ["TUI", "ReiseCenter", "Neuss", "Innenstadt"]
 
-	Polygonal.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Polygonal.prototype.getClass = function getClass () {
-	  return Polygonal
-	};
 
-	var Polygon = (function (Geometry$$1) {
-	  function Polygon (shell, holes, factory) {
-	    Geometry$$1.call(this, factory);
-	    this._shell = null;
-	    this._holes = null;
-	    if (shell === null) {
-	      shell = this.getFactory().createLinearRing();
-	    }
-	    if (holes === null) {
-	      holes = [];
-	    }
-	    if (Geometry$$1.hasNullElements(holes)) {
-	      throw new IllegalArgumentException('holes must not contain null elements')
-	    }
-	    if (shell.isEmpty() && Geometry$$1.hasNonEmptyElements(holes)) {
-	      throw new IllegalArgumentException('shell is empty but holes are not')
-	    }
-	    this._shell = shell;
-	    this._holes = holes;
-	  }
+	  if (tags.name && testNameFragments) {
+	    var nameParts = tags.name.split(/[\s\-\/,.]/);
 
-	  if ( Geometry$$1 ) { Polygon.__proto__ = Geometry$$1; }
-	  Polygon.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  Polygon.prototype.constructor = Polygon;
+	    for (var split = nameParts.length; split > 0; split--) {
+	      var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
-	  Polygon.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-	    return this._shell.getEnvelopeInternal()
-	  };
-	  Polygon.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry$$1.SORTINDEX_POLYGON
-	  };
-	  Polygon.prototype.getCoordinates = function getCoordinates () {
-	    var this$1 = this;
-
-	    if (this.isEmpty()) {
-	      return []
-	    }
-	    var coordinates = new Array(this.getNumPoints()).fill(null);
-	    var k = -1;
-	    var shellCoordinates = this._shell.getCoordinates();
-	    for (var x = 0; x < shellCoordinates.length; x++) {
-	      k++;
-	      coordinates[k] = shellCoordinates[x];
-	    }
-	    for (var i = 0; i < this._holes.length; i++) {
-	      var childCoordinates = this$1._holes[i].getCoordinates();
-	      for (var j = 0; j < childCoordinates.length; j++) {
-	        k++;
-	        coordinates[k] = childCoordinates[j];
-	      }
+	      primary.add(name);
 	    }
-	    return coordinates
-	  };
-	  Polygon.prototype.getArea = function getArea () {
-	    var this$1 = this;
+	  } // Check all tags
 
-	    var area = 0.0;
-	    area += Math.abs(CGAlgorithms.signedArea(this._shell.getCoordinateSequence()));
-	    for (var i = 0; i < this._holes.length; i++) {
-	      area -= Math.abs(CGAlgorithms.signedArea(this$1._holes[i].getCoordinateSequence()));
-	    }
-	    return area
-	  };
-	  Polygon.prototype.isRectangle = function isRectangle () {
-	    if (this.getNumInteriorRing() !== 0) { return false }
-	    if (this._shell === null) { return false }
-	    if (this._shell.getNumPoints() !== 5) { return false }
-	    var seq = this._shell.getCoordinateSequence();
-	    var env = this.getEnvelopeInternal();
-	    for (var i = 0; i < 5; i++) {
-	      var x = seq.getX(i);
-	      if (!(x === env.getMinX() || x === env.getMaxX())) { return false }
-	      var y = seq.getY(i);
-	      if (!(y === env.getMinY() || y === env.getMaxY())) { return false }
-	    }
-	    var prevX = seq.getX(0);
-	    var prevY = seq.getY(0);
-	    for (var i$1 = 1; i$1 <= 4; i$1++) {
-	      var x$1 = seq.getX(i$1);
-	      var y$1 = seq.getY(i$1);
-	      var xChanged = x$1 !== prevX;
-	      var yChanged = y$1 !== prevY;
-	      if (xChanged === yChanged) { return false }
-	      prevX = x$1;
-	      prevY = y$1;
-	    }
-	    return true
-	  };
-	  Polygon.prototype.equalsExact = function equalsExact () {
-	    var this$1 = this;
 
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
+	  Object.keys(tags).forEach(function (osmkey) {
+	    var osmvalue = tags[osmkey];
+	    if (!osmvalue) return;
+
+	    if (isNamelike(osmkey, 'primary')) {
+	      if (/;/.test(osmvalue)) {
+	        foundSemi = true;
+	      } else {
+	        primary.add(osmvalue);
+	        alternate["delete"](osmvalue);
 	      }
-	      var otherPolygon = other;
-	      var thisShell = this._shell;
-	      var otherPolygonShell = otherPolygon._shell;
-	      if (!thisShell.equalsExact(otherPolygonShell, tolerance)) {
-	        return false
-	      }
-	      if (this._holes.length !== otherPolygon._holes.length) {
-	        return false
+	    } else if (!primary.has(osmvalue) && isNamelike(osmkey, 'alternate')) {
+	      if (/;/.test(osmvalue)) {
+	        foundSemi = true;
+	      } else {
+	        alternate.add(osmvalue);
 	      }
-	      for (var i = 0; i < this._holes.length; i++) {
-	        if (!this$1._holes[i].equalsExact(otherPolygon._holes[i], tolerance)) {
-	          return false
-	        }
-	      }
-	      return true
-	    } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  Polygon.prototype.normalize = function normalize () {
-	    var this$1 = this;
-
-	    if (arguments.length === 0) {
-	      this.normalize(this._shell, true);
-	      for (var i = 0; i < this._holes.length; i++) {
-	        this$1.normalize(this$1._holes[i], false);
-	      }
-	      Arrays.sort(this._holes);
-	    } else if (arguments.length === 2) {
-	      var ring = arguments[0];
-	      var clockwise = arguments[1];
-	      if (ring.isEmpty()) {
-	        return null
-	      }
-	      var uniqueCoordinates = new Array(ring.getCoordinates().length - 1).fill(null);
-	      System.arraycopy(ring.getCoordinates(), 0, uniqueCoordinates, 0, uniqueCoordinates.length);
-	      var minCoordinate = CoordinateArrays.minCoordinate(ring.getCoordinates());
-	      CoordinateArrays.scroll(uniqueCoordinates, minCoordinate);
-	      System.arraycopy(uniqueCoordinates, 0, ring.getCoordinates(), 0, uniqueCoordinates.length);
-	      ring.getCoordinates()[uniqueCoordinates.length] = uniqueCoordinates[0];
-	      if (CGAlgorithms.isCCW(ring.getCoordinates()) === clockwise) {
-	        CoordinateArrays.reverse(ring.getCoordinates());
-	      }
-	    }
-	  };
-	  Polygon.prototype.getCoordinate = function getCoordinate () {
-	    return this._shell.getCoordinate()
-	  };
-	  Polygon.prototype.getNumInteriorRing = function getNumInteriorRing () {
-	    return this._holes.length
-	  };
-	  Polygon.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    return 1
-	  };
-	  Polygon.prototype.getDimension = function getDimension () {
-	    return 2
-	  };
-	  Polygon.prototype.getLength = function getLength () {
-	    var this$1 = this;
-
-	    var len = 0.0;
-	    len += this._shell.getLength();
-	    for (var i = 0; i < this._holes.length; i++) {
-	      len += this$1._holes[i].getLength();
-	    }
-	    return len
-	  };
-	  Polygon.prototype.getNumPoints = function getNumPoints () {
-	    var this$1 = this;
-
-	    var numPoints = this._shell.getNumPoints();
-	    for (var i = 0; i < this._holes.length; i++) {
-	      numPoints += this$1._holes[i].getNumPoints();
-	    }
-	    return numPoints
-	  };
-	  Polygon.prototype.reverse = function reverse () {
-	    var this$1 = this;
-
-	    var poly = this.copy();
-	    poly._shell = this._shell.copy().reverse();
-	    poly._holes = new Array(this._holes.length).fill(null);
-	    for (var i = 0; i < this._holes.length; i++) {
-	      poly._holes[i] = this$1._holes[i].copy().reverse();
-	    }
-	    return poly
-	  };
-	  Polygon.prototype.convexHull = function convexHull () {
-	    return this.getExteriorRing().convexHull()
-	  };
-	  Polygon.prototype.compareToSameClass = function compareToSameClass () {
-	    var this$1 = this;
+	    }
+	  }); // For flags only, fallback to `country` tag only if no other namelike values were found.
+	  // See https://github.com/openstreetmap/iD/pull/8305#issuecomment-769174070
 
-	    if (arguments.length === 1) {
-	      var o = arguments[0];
-	      var thisShell = this._shell;
-	      var otherShell = o._shell;
-	      return thisShell.compareToSameClass(otherShell)
-	    } else if (arguments.length === 2) {
-	      var o$1 = arguments[0];
-	      var comp = arguments[1];
-	      var poly = o$1;
-	      var thisShell$1 = this._shell;
-	      var otherShell$1 = poly._shell;
-	      var shellComp = thisShell$1.compareToSameClass(otherShell$1, comp);
-	      if (shellComp !== 0) { return shellComp }
-	      var nHole1 = this.getNumInteriorRing();
-	      var nHole2 = poly.getNumInteriorRing();
-	      var i = 0;
-	      while (i < nHole1 && i < nHole2) {
-	        var thisHole = this$1.getInteriorRingN(i);
-	        var otherHole = poly.getInteriorRingN(i);
-	        var holeComp = thisHole.compareToSameClass(otherHole, comp);
-	        if (holeComp !== 0) { return holeComp }
-	        i++;
-	      }
-	      if (i < nHole1) { return 1 }
-	      if (i < nHole2) { return -1 }
-	      return 0
+	  if (tags.man_made === 'flagpole' && !primary.size && !alternate.size && !!tags.country) {
+	    var osmvalue = tags.country;
+
+	    if (/;/.test(osmvalue)) {
+	      foundSemi = true;
+	    } else {
+	      alternate.add(osmvalue);
 	    }
-	  };
-	  Polygon.prototype.apply = function apply (filter) {
-	    var this$1 = this;
+	  } // If any namelike value contained a semicolon, return empty set and don't try matching anything.
 
-	    if (hasInterface(filter, CoordinateFilter)) {
-	      this._shell.apply(filter);
-	      for (var i$1 = 0; i$1 < this._holes.length; i$1++) {
-	        this$1._holes[i$1].apply(filter);
-	      }
-	    } else if (hasInterface(filter, CoordinateSequenceFilter)) {
-	      this._shell.apply(filter);
-	      if (!filter.isDone()) {
-	        for (var i$2 = 0; i$2 < this._holes.length; i$2++) {
-	          this$1._holes[i$2].apply(filter);
-	          if (filter.isDone()) { break }
+
+	  if (foundSemi) {
+	    return empty;
+	  } else {
+	    return {
+	      primary: primary,
+	      alternate: alternate
+	    };
+	  }
+
+	  function isNamelike(osmkey, which) {
+	    if (osmkey === 'old_name') return false;
+	    return patterns[which].test(osmkey) && !notNames.test(osmkey);
+	  }
+	} // `gatherTuples()`
+	// Generate all combinations of [key,value,name] that we want to test.
+	// This prioritizes them so that the primary name and k/v pairs go first
+	//
+	// Arguments
+	//   `tryKVs`: `Object` containing primary and alternate k/v pairs to test
+	//   `tryNames`: `Object` containing primary and alternate names to test
+	// Returns
+	//   `Array`: tuple objects ordered by priority
+	//
+
+
+	function gatherTuples(tryKVs, tryNames) {
+	  var tuples = [];
+	  ['primary', 'alternate'].forEach(function (whichName) {
+	    // test names longest to shortest
+	    var arr = Array.from(tryNames[whichName]).sort(function (a, b) {
+	      return b.length - a.length;
+	    });
+	    arr.forEach(function (n) {
+	      ['primary', 'alternate'].forEach(function (whichKV) {
+	        tryKVs[whichKV].forEach(function (kv) {
+	          var parts = kv.split('/', 2);
+	          var k = parts[0];
+	          var v = parts[1];
+	          tuples.push({
+	            k: k,
+	            v: v,
+	            n: n
+	          });
+	        });
+	      });
+	    });
+	  });
+	  return tuples;
+	} // `_upgradeTags()`
+	// Try to match a feature to a canonical record in name-suggestion-index
+	// and upgrade the tags to match.
+	//
+	// Arguments
+	//   `tags`: `Object` containing the feature's OSM tags
+	//   `loc`: Location where this feature exists, as a [lon, lat]
+	// Returns
+	//   `Object` containing the result, or `null` if no changes needed:
+	//   {
+	//     'newTags': `Object` - The tags the the feature should have
+	//     'matched': `Object` - The matched item
+	//   }
+	//
+
+
+	function _upgradeTags(tags, loc) {
+	  var newTags = Object.assign({}, tags); // shallow copy
+
+	  var changed = false; // Before anything, perform trivial Wikipedia/Wikidata replacements
+
+	  Object.keys(newTags).forEach(function (osmkey) {
+	    var matchTag = osmkey.match(/^(\w+:)?wikidata$/);
+
+	    if (matchTag) {
+	      // Look at '*:wikidata' tags
+	      var prefix = matchTag[1] || '';
+	      var wd = newTags[osmkey];
+	      var replace = _nsi.replacements[wd]; // If it matches a QID in the replacement list...
+
+	      if (replace && replace.wikidata !== undefined) {
+	        // replace or delete `*:wikidata` tag
+	        changed = true;
+
+	        if (replace.wikidata) {
+	          newTags[osmkey] = replace.wikidata;
+	        } else {
+	          delete newTags[osmkey];
 	        }
 	      }
-	      if (filter.isGeometryChanged()) { this.geometryChanged(); }
-	    } else if (hasInterface(filter, GeometryFilter)) {
-	      filter.filter(this);
-	    } else if (hasInterface(filter, GeometryComponentFilter)) {
-	      filter.filter(this);
-	      this._shell.apply(filter);
-	      for (var i = 0; i < this._holes.length; i++) {
-	        this$1._holes[i].apply(filter);
+
+	      if (replace && replace.wikipedia !== undefined) {
+	        // replace or delete `*:wikipedia` tag
+	        changed = true;
+	        var wpkey = "".concat(prefix, "wikipedia");
+
+	        if (replace.wikipedia) {
+	          newTags[wpkey] = replace.wikipedia;
+	        } else {
+	          delete newTags[wpkey];
+	        }
 	      }
 	    }
-	  };
-	  Polygon.prototype.getBoundary = function getBoundary () {
-	    var this$1 = this;
+	  }); // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
 
-	    if (this.isEmpty()) {
-	      return this.getFactory().createMultiLineString()
-	    }
-	    var rings = new Array(this._holes.length + 1).fill(null);
-	    rings[0] = this._shell;
-	    for (var i = 0; i < this._holes.length; i++) {
-	      rings[i + 1] = this$1._holes[i];
-	    }
-	    if (rings.length <= 1) { return this.getFactory().createLinearRing(rings[0].getCoordinateSequence()) }
-	    return this.getFactory().createMultiLineString(rings)
-	  };
-	  Polygon.prototype.clone = function clone () {
-	    var this$1 = this;
+	  var isRouteMaster = tags.type === 'route_master'; // Gather key/value tag pairs to try to match
 
-	    var poly = Geometry$$1.prototype.clone.call(this);
-	    poly._shell = this._shell.clone();
-	    poly._holes = new Array(this._holes.length).fill(null);
-	    for (var i = 0; i < this._holes.length; i++) {
-	      poly._holes[i] = this$1._holes[i].clone();
-	    }
-	    return poly
-	  };
-	  Polygon.prototype.getGeometryType = function getGeometryType () {
-	    return 'Polygon'
-	  };
-	  Polygon.prototype.copy = function copy () {
-	    var this$1 = this;
+	  var tryKVs = gatherKVs(tags);
 
-	    var shell = this._shell.copy();
-	    var holes = new Array(this._holes.length).fill(null);
-	    for (var i = 0; i < holes.length; i++) {
-	      holes[i] = this$1._holes[i].copy();
-	    }
-	    return new Polygon(shell, holes, this._factory)
-	  };
-	  Polygon.prototype.getExteriorRing = function getExteriorRing () {
-	    return this._shell
-	  };
-	  Polygon.prototype.isEmpty = function isEmpty () {
-	    return this._shell.isEmpty()
-	  };
-	  Polygon.prototype.getInteriorRingN = function getInteriorRingN (n) {
-	    return this._holes[n]
-	  };
-	  Polygon.prototype.interfaces_ = function interfaces_ () {
-	    return [Polygonal]
-	  };
-	  Polygon.prototype.getClass = function getClass () {
-	    return Polygon
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return -3494792200821764533 };
+	  if (!tryKVs.primary.size && !tryKVs.alternate.size) {
+	    return changed ? {
+	      newTags: newTags,
+	      matched: null
+	    } : null;
+	  } // Gather namelike tag values to try to match
 
-	  Object.defineProperties( Polygon, staticAccessors );
 
-	  return Polygon;
-	}(Geometry));
+	  var tryNames = gatherNames(tags); // Do `wikidata=*` or `wikipedia=*` tags identify this entity as a chain? - See #6416
+	  // If so, these tags can be swapped to e.g. `brand:wikidata`/`brand:wikipedia`.
 
-	var MultiPoint = (function (GeometryCollection$$1) {
-	  function MultiPoint () {
-	    GeometryCollection$$1.apply(this, arguments);
-	  }
+	  var foundQID = _nsi.qids.get(tags.wikidata) || _nsi.qids.get(tags.wikipedia);
 
-	  if ( GeometryCollection$$1 ) { MultiPoint.__proto__ = GeometryCollection$$1; }
-	  MultiPoint.prototype = Object.create( GeometryCollection$$1 && GeometryCollection$$1.prototype );
-	  MultiPoint.prototype.constructor = MultiPoint;
+	  if (foundQID) tryNames.primary.add(foundQID); // matcher will recognize the Wikidata QID as name too
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
+	  if (!tryNames.primary.size && !tryNames.alternate.size) {
+	    return changed ? {
+	      newTags: newTags,
+	      matched: null
+	    } : null;
+	  } // Order the [key,value,name] tuples - test primary names before alternate names
 
-	  MultiPoint.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry.SORTINDEX_MULTIPOINT
-	  };
-	  MultiPoint.prototype.isValid = function isValid () {
-	    return true
-	  };
-	  MultiPoint.prototype.equalsExact = function equalsExact () {
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      return GeometryCollection$$1.prototype.equalsExact.call(this, other, tolerance)
-	    } else { return GeometryCollection$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  MultiPoint.prototype.getCoordinate = function getCoordinate () {
-	    if (arguments.length === 1) {
-	      var n = arguments[0];
-	      return this._geometries[n].getCoordinate()
-	    } else { return GeometryCollection$$1.prototype.getCoordinate.apply(this, arguments) }
-	  };
-	  MultiPoint.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    return Dimension.FALSE
-	  };
-	  MultiPoint.prototype.getDimension = function getDimension () {
-	    return 0
-	  };
-	  MultiPoint.prototype.getBoundary = function getBoundary () {
-	    return this.getFactory().createGeometryCollection(null)
-	  };
-	  MultiPoint.prototype.getGeometryType = function getGeometryType () {
-	    return 'MultiPoint'
-	  };
-	  MultiPoint.prototype.copy = function copy () {
-	    var this$1 = this;
 
-	    var points = new Array(this._geometries.length).fill(null);
-	    for (var i = 0; i < points.length; i++) {
-	      points[i] = this$1._geometries[i].copy();
-	    }
-	    return new MultiPoint(points, this._factory)
-	  };
-	  MultiPoint.prototype.interfaces_ = function interfaces_ () {
-	    return [Puntal]
-	  };
-	  MultiPoint.prototype.getClass = function getClass () {
-	    return MultiPoint
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return -8048474874175355449 };
+	  var tuples = gatherTuples(tryKVs, tryNames);
+	  var foundPrimary = false;
+	  var bestItem; // Test [key,value,name] tuples against the NSI matcher until we get a primary match or exhaust all options.
 
-	  Object.defineProperties( MultiPoint, staticAccessors );
+	  for (var i = 0; i < tuples.length && !foundPrimary; i++) {
+	    var tuple = tuples[i];
 
-	  return MultiPoint;
-	}(GeometryCollection));
+	    var hits = _nsi.matcher.match(tuple.k, tuple.v, tuple.n, loc); // Attempt to match an item in NSI
 
-	var LinearRing = (function (LineString$$1) {
-	  function LinearRing (points, factory) {
-	    if (points instanceof Coordinate && factory instanceof GeometryFactory) {
-	      points = factory.getCoordinateSequenceFactory().create(points);
-	    }
-	    LineString$$1.call(this, points, factory);
-	    this.validateConstruction();
-	  }
 
-	  if ( LineString$$1 ) { LinearRing.__proto__ = LineString$$1; }
-	  LinearRing.prototype = Object.create( LineString$$1 && LineString$$1.prototype );
-	  LinearRing.prototype.constructor = LinearRing;
+	    if (!hits || !hits.length) continue; // no match, try next tuple
 
-	  var staticAccessors = { MINIMUM_VALID_SIZE: { configurable: true },serialVersionUID: { configurable: true } };
-	  LinearRing.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry.SORTINDEX_LINEARRING
-	  };
-	  LinearRing.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    return Dimension.FALSE
-	  };
-	  LinearRing.prototype.isClosed = function isClosed () {
-	    if (this.isEmpty()) {
-	      return true
-	    }
-	    return LineString$$1.prototype.isClosed.call(this)
-	  };
-	  LinearRing.prototype.reverse = function reverse () {
-	    var seq = this._points.copy();
-	    CoordinateSequences.reverse(seq);
-	    var rev = this.getFactory().createLinearRing(seq);
-	    return rev
-	  };
-	  LinearRing.prototype.validateConstruction = function validateConstruction () {
-	    if (!this.isEmpty() && !LineString$$1.prototype.isClosed.call(this)) {
-	      throw new IllegalArgumentException('Points of LinearRing do not form a closed linestring')
-	    }
-	    if (this.getCoordinateSequence().size() >= 1 && this.getCoordinateSequence().size() < LinearRing.MINIMUM_VALID_SIZE) {
-	      throw new IllegalArgumentException('Invalid number of points in LinearRing (found ' + this.getCoordinateSequence().size() + ' - must be 0 or >= 4)')
-	    }
-	  };
-	  LinearRing.prototype.getGeometryType = function getGeometryType () {
-	    return 'LinearRing'
-	  };
-	  LinearRing.prototype.copy = function copy () {
-	    return new LinearRing(this._points.copy(), this._factory)
-	  };
-	  LinearRing.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  LinearRing.prototype.getClass = function getClass () {
-	    return LinearRing
-	  };
-	  staticAccessors.MINIMUM_VALID_SIZE.get = function () { return 4 };
-	  staticAccessors.serialVersionUID.get = function () { return -4261142084085851829 };
+	    if (hits[0].match !== 'primary' && hits[0].match !== 'alternate') break; // a generic match, stop looking
+	    // A match may contain multiple results, the first one is likely the best one for this location
+	    // e.g. `['pfk-a54c14', 'kfc-1ff19c', 'kfc-658eea']`
 
-	  Object.defineProperties( LinearRing, staticAccessors );
+	    for (var j = 0; j < hits.length; j++) {
+	      var hit = hits[j];
+	      var isPrimary = hits[j].match === 'primary';
+	      var itemID = hit.itemID;
+	      if (_nsi.dissolved[itemID]) continue; // Don't upgrade to a dissolved item
 
-	  return LinearRing;
-	}(LineString));
+	      var item = _nsi.ids.get(itemID);
 
-	var MultiPolygon = (function (GeometryCollection$$1) {
-	  function MultiPolygon () {
-	    GeometryCollection$$1.apply(this, arguments);
-	  }
+	      if (!item) continue;
+	      var mainTag = item.mainTag; // e.g. `brand:wikidata`
 
-	  if ( GeometryCollection$$1 ) { MultiPolygon.__proto__ = GeometryCollection$$1; }
-	  MultiPolygon.prototype = Object.create( GeometryCollection$$1 && GeometryCollection$$1.prototype );
-	  MultiPolygon.prototype.constructor = MultiPolygon;
+	      var itemQID = item.tags[mainTag]; // e.g. `brand:wikidata` qid
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
+	      var notQID = newTags["not:".concat(mainTag)]; // e.g. `not:brand:wikidata` qid
 
-	  MultiPolygon.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry.SORTINDEX_MULTIPOLYGON
-	  };
-	  MultiPolygon.prototype.equalsExact = function equalsExact () {
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      return GeometryCollection$$1.prototype.equalsExact.call(this, other, tolerance)
-	    } else { return GeometryCollection$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  MultiPolygon.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    return 1
-	  };
-	  MultiPolygon.prototype.getDimension = function getDimension () {
-	    return 2
-	  };
-	  MultiPolygon.prototype.reverse = function reverse () {
-	    var this$1 = this;
+	      if ( // Exceptions, skip this hit
+	      !itemQID || itemQID === notQID || // No `*:wikidata` or matched a `not:*:wikidata`
+	      newTags.office && !item.tags.office // feature may be a corporate office for a brand? - #6416
+	      ) {
+	        continue; // continue looking
+	      } // If we get here, the hit is good..
 
-	    var n = this._geometries.length;
-	    var revGeoms = new Array(n).fill(null);
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      revGeoms[i] = this$1._geometries[i].reverse();
-	    }
-	    return this.getFactory().createMultiPolygon(revGeoms)
-	  };
-	  MultiPolygon.prototype.getBoundary = function getBoundary () {
-	    var this$1 = this;
 
-	    if (this.isEmpty()) {
-	      return this.getFactory().createMultiLineString()
-	    }
-	    var allRings = new ArrayList();
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      var polygon = this$1._geometries[i];
-	      var rings = polygon.getBoundary();
-	      for (var j = 0; j < rings.getNumGeometries(); j++) {
-	        allRings.add(rings.getGeometryN(j));
+	      if (!bestItem || isPrimary) {
+	        bestItem = item;
+
+	        if (isPrimary) {
+	          foundPrimary = true;
+	        }
+
+	        break; // can ignore the rest of the hits from this match
 	      }
 	    }
-	    var allRingsArray = new Array(allRings.size()).fill(null);
-	    return this.getFactory().createMultiLineString(allRings.toArray(allRingsArray))
-	  };
-	  MultiPolygon.prototype.getGeometryType = function getGeometryType () {
-	    return 'MultiPolygon'
-	  };
-	  MultiPolygon.prototype.copy = function copy () {
-	    var this$1 = this;
+	  } // At this point we have matched a canonical item and can suggest tag upgrades..
 
-	    var polygons = new Array(this._geometries.length).fill(null);
-	    for (var i = 0; i < polygons.length; i++) {
-	      polygons[i] = this$1._geometries[i].copy();
-	    }
-	    return new MultiPolygon(polygons, this._factory)
-	  };
-	  MultiPolygon.prototype.interfaces_ = function interfaces_ () {
-	    return [Polygonal]
-	  };
-	  MultiPolygon.prototype.getClass = function getClass () {
-	    return MultiPolygon
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return -551033529766975875 };
 
-	  Object.defineProperties( MultiPolygon, staticAccessors );
+	  if (bestItem) {
+	    var _ret = function () {
+	      var itemID = bestItem.id;
+	      var item = JSON.parse(JSON.stringify(bestItem)); // deep copy
 
-	  return MultiPolygon;
-	}(GeometryCollection));
+	      var tkv = item.tkv;
+	      var parts = tkv.split('/', 3); // tkv = "tree/key/value"
 
-	var GeometryEditor = function GeometryEditor (factory) {
-	  this._factory = factory || null;
-	  this._isUserDataCopied = false;
-	};
+	      var k = parts[1];
+	      var v = parts[2];
+	      var category = _nsi.data[tkv];
+	      var properties = category.properties || {}; // Preserve some tags that we specifically don't want NSI to overwrite. ('^name', sometimes)
 
-	var staticAccessors$16 = { NoOpGeometryOperation: { configurable: true },CoordinateOperation: { configurable: true },CoordinateSequenceOperation: { configurable: true } };
-	GeometryEditor.prototype.setCopyUserData = function setCopyUserData (isUserDataCopied) {
-	  this._isUserDataCopied = isUserDataCopied;
-	};
-	GeometryEditor.prototype.edit = function edit (geometry, operation) {
-	  if (geometry === null) { return null }
-	  var result = this.editInternal(geometry, operation);
-	  if (this._isUserDataCopied) {
-	    result.setUserData(geometry.getUserData());
-	  }
-	  return result
-	};
-	GeometryEditor.prototype.editInternal = function editInternal (geometry, operation) {
-	  if (this._factory === null) { this._factory = geometry.getFactory(); }
-	  if (geometry instanceof GeometryCollection) {
-	    return this.editGeometryCollection(geometry, operation)
-	  }
-	  if (geometry instanceof Polygon) {
-	    return this.editPolygon(geometry, operation)
-	  }
-	  if (geometry instanceof Point$1) {
-	    return operation.edit(geometry, this._factory)
-	  }
-	  if (geometry instanceof LineString) {
-	    return operation.edit(geometry, this._factory)
-	  }
-	  Assert.shouldNeverReachHere('Unsupported Geometry class: ' + geometry.getClass().getName());
-	  return null
-	};
-	GeometryEditor.prototype.editGeometryCollection = function editGeometryCollection (collection, operation) {
-	    var this$1 = this;
+	      var preserveTags = item.preserveTags || properties.preserveTags || []; // These tags can be toplevel tags -or- attributes - so we generally want to preserve existing values - #8615
+	      // We'll only _replace_ the tag value if this tag is the toplevel/defining tag for the matched item (`k`)
 
-	  var collectionForType = operation.edit(collection, this._factory);
-	  var geometries = new ArrayList();
-	  for (var i = 0; i < collectionForType.getNumGeometries(); i++) {
-	    var geometry = this$1.edit(collectionForType.getGeometryN(i), operation);
-	    if (geometry === null || geometry.isEmpty()) {
-	      continue
-	    }
-	    geometries.add(geometry);
-	  }
-	  if (collectionForType.getClass() === MultiPoint) {
-	    return this._factory.createMultiPoint(geometries.toArray([]))
-	  }
-	  if (collectionForType.getClass() === MultiLineString) {
-	    return this._factory.createMultiLineString(geometries.toArray([]))
-	  }
-	  if (collectionForType.getClass() === MultiPolygon) {
-	    return this._factory.createMultiPolygon(geometries.toArray([]))
-	  }
-	  return this._factory.createGeometryCollection(geometries.toArray([]))
-	};
-	GeometryEditor.prototype.editPolygon = function editPolygon (polygon, operation) {
-	    var this$1 = this;
+	      ['building', 'emergency', 'internet_access', 'takeaway'].forEach(function (osmkey) {
+	        if (k !== osmkey) preserveTags.push("^".concat(osmkey, "$"));
+	      });
+	      var regexes = preserveTags.map(function (s) {
+	        return new RegExp(s, 'i');
+	      });
+	      var keepTags = {};
+	      Object.keys(newTags).forEach(function (osmkey) {
+	        if (regexes.some(function (regex) {
+	          return regex.test(osmkey);
+	        })) {
+	          keepTags[osmkey] = newTags[osmkey];
+	        }
+	      }); // Remove any primary tags ("amenity", "craft", "shop", "man_made", "route", etc) that have a
+	      // value like `amenity=yes` or `shop=yes` (exceptions have already been added to `keepTags` above)
 
-	  var newPolygon = operation.edit(polygon, this._factory);
-	  if (newPolygon === null) { newPolygon = this._factory.createPolygon(null); }
-	  if (newPolygon.isEmpty()) {
-	    return newPolygon
-	  }
-	  var shell = this.edit(newPolygon.getExteriorRing(), operation);
-	  if (shell === null || shell.isEmpty()) {
-	    return this._factory.createPolygon()
-	  }
-	  var holes = new ArrayList();
-	  for (var i = 0; i < newPolygon.getNumInteriorRing(); i++) {
-	    var hole = this$1.edit(newPolygon.getInteriorRingN(i), operation);
-	    if (hole === null || hole.isEmpty()) {
-	      continue
-	    }
-	    holes.add(hole);
-	  }
-	  return this._factory.createPolygon(shell, holes.toArray([]))
-	};
-	GeometryEditor.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryEditor.prototype.getClass = function getClass () {
-	  return GeometryEditor
-	};
-	GeometryEditor.GeometryEditorOperation = function GeometryEditorOperation () {};
-	staticAccessors$16.NoOpGeometryOperation.get = function () { return NoOpGeometryOperation };
-	staticAccessors$16.CoordinateOperation.get = function () { return CoordinateOperation };
-	staticAccessors$16.CoordinateSequenceOperation.get = function () { return CoordinateSequenceOperation };
+	      _nsi.kvt.forEach(function (vmap, k) {
+	        if (newTags[k] === 'yes') delete newTags[k];
+	      }); // Replace mistagged `wikidata`/`wikipedia` with e.g. `brand:wikidata`/`brand:wikipedia`
 
-	Object.defineProperties( GeometryEditor, staticAccessors$16 );
 
-	var NoOpGeometryOperation = function NoOpGeometryOperation () {};
+	      if (foundQID) {
+	        delete newTags.wikipedia;
+	        delete newTags.wikidata;
+	      } // Do the tag upgrade
 
-	NoOpGeometryOperation.prototype.edit = function edit (geometry, factory) {
-	  return geometry
-	};
-	NoOpGeometryOperation.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryEditor.GeometryEditorOperation]
-	};
-	NoOpGeometryOperation.prototype.getClass = function getClass () {
-	  return NoOpGeometryOperation
-	};
 
-	var CoordinateOperation = function CoordinateOperation () {};
+	      Object.assign(newTags, item.tags, keepTags); // Swap `route` back to `route_master` - name-suggestion-index#5184
 
-	CoordinateOperation.prototype.edit = function edit (geometry, factory) {
-	  var coords = this.editCoordinates(geometry.getCoordinates(), geometry);
-	  if (coords === null) { return geometry }
-	  if (geometry instanceof LinearRing) {
-	    return factory.createLinearRing(coords)
-	  }
-	  if (geometry instanceof LineString) {
-	    return factory.createLineString(coords)
-	  }
-	  if (geometry instanceof Point$1) {
-	    if (coords.length > 0) {
-	      return factory.createPoint(coords[0])
-	    } else {
-	      return factory.createPoint()
-	    }
-	  }
-	  return geometry
-	};
-	CoordinateOperation.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryEditor.GeometryEditorOperation]
-	};
-	CoordinateOperation.prototype.getClass = function getClass () {
-	  return CoordinateOperation
-	};
+	      if (isRouteMaster) {
+	        newTags.route_master = newTags.route;
+	        delete newTags.route;
+	      } // Special `branch` splitting rules - IF..
+	      // - NSI is suggesting to replace `name`, AND
+	      // - `branch` doesn't already contain something, AND
+	      // - original name has not moved to an alternate name (e.g. "Dunkin' Donuts" -> "Dunkin'"), AND
+	      // - original name is "some name" + "some stuff", THEN
+	      // consider splitting `name` into `name`/`branch`..
 
-	var CoordinateSequenceOperation = function CoordinateSequenceOperation () {};
 
-	CoordinateSequenceOperation.prototype.edit = function edit (geometry, factory) {
-	  if (geometry instanceof LinearRing) {
-	    return factory.createLinearRing(this.edit(geometry.getCoordinateSequence(), geometry))
-	  }
-	  if (geometry instanceof LineString) {
-	    return factory.createLineString(this.edit(geometry.getCoordinateSequence(), geometry))
-	  }
-	  if (geometry instanceof Point$1) {
-	    return factory.createPoint(this.edit(geometry.getCoordinateSequence(), geometry))
-	  }
-	  return geometry
-	};
-	CoordinateSequenceOperation.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryEditor.GeometryEditorOperation]
-	};
-	CoordinateSequenceOperation.prototype.getClass = function getClass () {
-	  return CoordinateSequenceOperation
-	};
+	      var origName = tags.name;
+	      var newName = newTags.name;
 
-	var CoordinateArraySequence = function CoordinateArraySequence () {
-	  var this$1 = this;
+	      if (newName && origName && newName !== origName && !newTags.branch) {
+	        var newNames = gatherNames(newTags);
+	        var newSet = new Set([].concat(_toConsumableArray(newNames.primary), _toConsumableArray(newNames.alternate)));
+	        var isMoved = newSet.has(origName); // another tag holds the original name now
 
-	  this._dimension = 3;
-	  this._coordinates = null;
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Array) {
-	      this._coordinates = arguments[0];
-	      this._dimension = 3;
-	    } else if (Number.isInteger(arguments[0])) {
-	      var size = arguments[0];
-	      this._coordinates = new Array(size).fill(null);
-	      for (var i = 0; i < size; i++) {
-	        this$1._coordinates[i] = new Coordinate();
-	      }
-	    } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordSeq = arguments[0];
-	      if (coordSeq === null) {
-	        this._coordinates = new Array(0).fill(null);
-	        return null
-	      }
-	      this._dimension = coordSeq.getDimension();
-	      this._coordinates = new Array(coordSeq.size()).fill(null);
-	      for (var i$1 = 0; i$1 < this._coordinates.length; i$1++) {
-	        this$1._coordinates[i$1] = coordSeq.getCoordinateCopy(i$1);
-	      }
-	    }
-	  } else if (arguments.length === 2) {
-	    if (arguments[0] instanceof Array && Number.isInteger(arguments[1])) {
-	      var coordinates = arguments[0];
-	      var dimension = arguments[1];
-	      this._coordinates = coordinates;
-	      this._dimension = dimension;
-	      if (coordinates === null) { this._coordinates = new Array(0).fill(null); }
-	    } else if (Number.isInteger(arguments[0]) && Number.isInteger(arguments[1])) {
-	      var size$1 = arguments[0];
-	      var dimension$1 = arguments[1];
-	      this._coordinates = new Array(size$1).fill(null);
-	      this._dimension = dimension$1;
-	      for (var i$2 = 0; i$2 < size$1; i$2++) {
-	        this$1._coordinates[i$2] = new Coordinate();
-	      }
-	    }
-	  }
-	};
+	        if (!isMoved) {
+	          // Test name fragments, longest to shortest, to fit them into a "Name Branch" pattern.
+	          // e.g. "TUI ReiseCenter - Neuss Innenstadt" -> ["TUI", "ReiseCenter", "Neuss", "Innenstadt"]
+	          var nameParts = origName.split(/[\s\-\/,.]/);
 
-	var staticAccessors$18 = { serialVersionUID: { configurable: true } };
-	CoordinateArraySequence.prototype.setOrdinate = function setOrdinate (index, ordinateIndex, value) {
-	  switch (ordinateIndex) {
-	    case CoordinateSequence.X:
-	      this._coordinates[index].x = value;
-	      break
-	    case CoordinateSequence.Y:
-	      this._coordinates[index].y = value;
-	      break
-	    case CoordinateSequence.Z:
-	      this._coordinates[index].z = value;
-	      break
-	    default:
-	      throw new IllegalArgumentException('invalid ordinateIndex')
-	  }
-	};
-	CoordinateArraySequence.prototype.size = function size () {
-	  return this._coordinates.length
-	};
-	CoordinateArraySequence.prototype.getOrdinate = function getOrdinate (index, ordinateIndex) {
-	  switch (ordinateIndex) {
-	    case CoordinateSequence.X:
-	      return this._coordinates[index].x
-	    case CoordinateSequence.Y:
-	      return this._coordinates[index].y
-	    case CoordinateSequence.Z:
-	      return this._coordinates[index].z
-	  }
-	  return Double.NaN
-	};
-	CoordinateArraySequence.prototype.getCoordinate = function getCoordinate () {
-	  if (arguments.length === 1) {
-	    var i = arguments[0];
-	    return this._coordinates[i]
-	  } else if (arguments.length === 2) {
-	    var index = arguments[0];
-	    var coord = arguments[1];
-	    coord.x = this._coordinates[index].x;
-	    coord.y = this._coordinates[index].y;
-	    coord.z = this._coordinates[index].z;
-	  }
-	};
-	CoordinateArraySequence.prototype.getCoordinateCopy = function getCoordinateCopy (i) {
-	  return new Coordinate(this._coordinates[i])
-	};
-	CoordinateArraySequence.prototype.getDimension = function getDimension () {
-	  return this._dimension
-	};
-	CoordinateArraySequence.prototype.getX = function getX (index) {
-	  return this._coordinates[index].x
-	};
-	CoordinateArraySequence.prototype.clone = function clone () {
-	    var this$1 = this;
+	          for (var split = nameParts.length; split > 0; split--) {
+	            var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"
 
-	  var cloneCoordinates = new Array(this.size()).fill(null);
-	  for (var i = 0; i < this._coordinates.length; i++) {
-	    cloneCoordinates[i] = this$1._coordinates[i].clone();
-	  }
-	  return new CoordinateArraySequence(cloneCoordinates, this._dimension)
-	};
-	CoordinateArraySequence.prototype.expandEnvelope = function expandEnvelope (env) {
-	    var this$1 = this;
+	            var branch = nameParts.slice(split).join(' '); // e.g. "Neuss Innenstadt"
 
-	  for (var i = 0; i < this._coordinates.length; i++) {
-	    env.expandToInclude(this$1._coordinates[i]);
-	  }
-	  return env
-	};
-	CoordinateArraySequence.prototype.copy = function copy () {
-	    var this$1 = this;
+	            var nameHits = _nsi.matcher.match(k, v, name, loc);
 
-	  var cloneCoordinates = new Array(this.size()).fill(null);
-	  for (var i = 0; i < this._coordinates.length; i++) {
-	    cloneCoordinates[i] = this$1._coordinates[i].copy();
-	  }
-	  return new CoordinateArraySequence(cloneCoordinates, this._dimension)
-	};
-	CoordinateArraySequence.prototype.toString = function toString () {
-	    var this$1 = this;
-
-	  if (this._coordinates.length > 0) {
-	    var strBuf = new StringBuffer(17 * this._coordinates.length);
-	    strBuf.append('(');
-	    strBuf.append(this._coordinates[0]);
-	    for (var i = 1; i < this._coordinates.length; i++) {
-	      strBuf.append(', ');
-	      strBuf.append(this$1._coordinates[i]);
-	    }
-	    strBuf.append(')');
-	    return strBuf.toString()
-	  } else {
-	    return '()'
-	  }
-	};
-	CoordinateArraySequence.prototype.getY = function getY (index) {
-	  return this._coordinates[index].y
-	};
-	CoordinateArraySequence.prototype.toCoordinateArray = function toCoordinateArray () {
-	  return this._coordinates
-	};
-	CoordinateArraySequence.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateSequence, Serializable]
-	};
-	CoordinateArraySequence.prototype.getClass = function getClass () {
-	  return CoordinateArraySequence
-	};
-	staticAccessors$18.serialVersionUID.get = function () { return -915438501601840650 };
+	            if (!nameHits || !nameHits.length) continue; // no match, try next name fragment
+
+	            if (nameHits.some(function (hit) {
+	              return hit.itemID === itemID;
+	            })) {
+	              // matched the name fragment to the same itemID above
+	              if (branch) {
+	                if (notBranches.test(branch)) {
+	                  // "branch" was detected but is noise ("factory outlet", etc)
+	                  newTags.name = origName; // Leave `name` alone, this part of the name may be significant..
+	                } else {
+	                  var branchHits = _nsi.matcher.match(k, v, branch, loc);
 
-	Object.defineProperties( CoordinateArraySequence, staticAccessors$18 );
+	                  if (branchHits && branchHits.length) {
+	                    // if "branch" matched something else in NSI..
+	                    if (branchHits[0].match === 'primary' || branchHits[0].match === 'alternate') {
+	                      // if another brand! (e.g. "KFC - Taco Bell"?)
+	                      return {
+	                        v: null
+	                      }; //   bail out - can't suggest tags in this case
+	                    } // else a generic (e.g. "gas", "cafe") - ignore
 
-	var CoordinateArraySequenceFactory = function CoordinateArraySequenceFactory () {};
+	                  } else {
+	                    // "branch" is not noise and not something in NSI
+	                    newTags.branch = branch; // Stick it in the `branch` tag..
+	                  }
+	                }
+	              }
 
-	var staticAccessors$17 = { serialVersionUID: { configurable: true },instanceObject: { configurable: true } };
+	              break;
+	            }
+	          }
+	        }
+	      }
 
-	CoordinateArraySequenceFactory.prototype.readResolve = function readResolve () {
-	  return CoordinateArraySequenceFactory.instance()
-	};
-	CoordinateArraySequenceFactory.prototype.create = function create () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Array) {
-	      var coordinates = arguments[0];
-	      return new CoordinateArraySequence(coordinates)
-	    } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordSeq = arguments[0];
-	      return new CoordinateArraySequence(coordSeq)
-	    }
-	  } else if (arguments.length === 2) {
-	    var size = arguments[0];
-	    var dimension = arguments[1];
-	    if (dimension > 3) { dimension = 3; }
-	    if (dimension < 2) { return new CoordinateArraySequence(size) }
-	    return new CoordinateArraySequence(size, dimension)
+	      return {
+	        v: {
+	          newTags: newTags,
+	          matched: item
+	        }
+	      };
+	    }();
+
+	    if (_typeof(_ret) === "object") return _ret.v;
 	  }
-	};
-	CoordinateArraySequenceFactory.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateSequenceFactory, Serializable]
-	};
-	CoordinateArraySequenceFactory.prototype.getClass = function getClass () {
-	  return CoordinateArraySequenceFactory
-	};
-	CoordinateArraySequenceFactory.instance = function instance () {
-	  return CoordinateArraySequenceFactory.instanceObject
-	};
 
-	staticAccessors$17.serialVersionUID.get = function () { return -4099577099607551657 };
-	staticAccessors$17.instanceObject.get = function () { return new CoordinateArraySequenceFactory() };
+	  return changed ? {
+	    newTags: newTags,
+	    matched: null
+	  } : null;
+	} // `_isGenericName()`
+	// Is the `name` tag generic?
+	//
+	// Arguments
+	//   `tags`: `Object` containing the feature's OSM tags
+	// Returns
+	//   `true` if it is generic, `false` if not
+	//
 
-	Object.defineProperties( CoordinateArraySequenceFactory, staticAccessors$17 );
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/HashMap.html
-	 *
-	 * @extends {javascript.util.Map}
-	 * @constructor
-	 * @private
-	 */
-	var HashMap = (function (MapInterface) {
-	  function HashMap () {
-	    MapInterface.call(this);
-	    this.map_ = new Map();
-	  }
+	function _isGenericName(tags) {
+	  var n = tags.name;
+	  if (!n) return false; // tryNames just contains the `name` tag value and nothing else
 
-	  if ( MapInterface ) { HashMap.__proto__ = MapInterface; }
-	  HashMap.prototype = Object.create( MapInterface && MapInterface.prototype );
-	  HashMap.prototype.constructor = HashMap;
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.get = function get (key) {
-	    return this.map_.get(key) || null
-	  };
+	  var tryNames = {
+	    primary: new Set([n]),
+	    alternate: new Set()
+	  }; // Gather key/value tag pairs to try to match
 
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.put = function put (key, value) {
-	    this.map_.set(key, value);
-	    return value
-	  };
+	  var tryKVs = gatherKVs(tags);
+	  if (!tryKVs.primary.size && !tryKVs.alternate.size) return false; // Order the [key,value,name] tuples - test primary before alternate
 
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.values = function values () {
-	    var arrayList = new ArrayList();
-	    var it = this.map_.values();
-	    var o = it.next();
-	    while (!o.done) {
-	      arrayList.add(o.value);
-	      o = it.next();
-	    }
-	    return arrayList
-	  };
+	  var tuples = gatherTuples(tryKVs, tryNames);
 
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.entrySet = function entrySet () {
-	    var hashSet = new HashSet();
-	    this.map_.entries().forEach(function (entry) { return hashSet.add(entry); });
-	    return hashSet
-	  };
+	  for (var i = 0; i < tuples.length; i++) {
+	    var tuple = tuples[i];
 
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.size = function size () {
-	    return this.map_.size()
-	  };
-
-	  return HashMap;
-	}(Map$1$1));
-
-	var PrecisionModel = function PrecisionModel () {
-	  this._modelType = null;
-	  this._scale = null;
-	  if (arguments.length === 0) {
-	    this._modelType = PrecisionModel.FLOATING;
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Type$2) {
-	      var modelType = arguments[0];
-	      this._modelType = modelType;
-	      if (modelType === PrecisionModel.FIXED) {
-	        this.setScale(1.0);
-	      }
-	    } else if (typeof arguments[0] === 'number') {
-	      var scale = arguments[0];
-	      this._modelType = PrecisionModel.FIXED;
-	      this.setScale(scale);
-	    } else if (arguments[0] instanceof PrecisionModel) {
-	      var pm = arguments[0];
-	      this._modelType = pm._modelType;
-	      this._scale = pm._scale;
-	    }
-	  }
-	};
+	    var hits = _nsi.matcher.match(tuple.k, tuple.v, tuple.n); // Attempt to match an item in NSI
+	    // If we get a `excludeGeneric` hit, this is a generic name.
 
-	var staticAccessors$19 = { serialVersionUID: { configurable: true },maximumPreciseValue: { configurable: true } };
-	PrecisionModel.prototype.equals = function equals (other) {
-	  if (!(other instanceof PrecisionModel)) {
-	    return false
-	  }
-	  var otherPrecisionModel = other;
-	  return this._modelType === otherPrecisionModel._modelType && this._scale === otherPrecisionModel._scale
-	};
-	PrecisionModel.prototype.compareTo = function compareTo (o) {
-	  var other = o;
-	  var sigDigits = this.getMaximumSignificantDigits();
-	  var otherSigDigits = other.getMaximumSignificantDigits();
-	  return new Integer(sigDigits).compareTo(new Integer(otherSigDigits))
-	};
-	PrecisionModel.prototype.getScale = function getScale () {
-	  return this._scale
-	};
-	PrecisionModel.prototype.isFloating = function isFloating () {
-	  return this._modelType === PrecisionModel.FLOATING || this._modelType === PrecisionModel.FLOATING_SINGLE
-	};
-	PrecisionModel.prototype.getType = function getType () {
-	  return this._modelType
-	};
-	PrecisionModel.prototype.toString = function toString () {
-	  var description = 'UNKNOWN';
-	  if (this._modelType === PrecisionModel.FLOATING) {
-	    description = 'Floating';
-	  } else if (this._modelType === PrecisionModel.FLOATING_SINGLE) {
-	    description = 'Floating-Single';
-	  } else if (this._modelType === PrecisionModel.FIXED) {
-	    description = 'Fixed (Scale=' + this.getScale() + ')';
-	  }
-	  return description
-	};
-	PrecisionModel.prototype.makePrecise = function makePrecise () {
-	  if (typeof arguments[0] === 'number') {
-	    var val = arguments[0];
-	    if (Double.isNaN(val)) { return val }
-	    if (this._modelType === PrecisionModel.FLOATING_SINGLE) {
-	      var floatSingleVal = val;
-	      return floatSingleVal
-	    }
-	    if (this._modelType === PrecisionModel.FIXED) {
-	      return Math.round(val * this._scale) / this._scale
-	    }
-	    return val
-	  } else if (arguments[0] instanceof Coordinate) {
-	    var coord = arguments[0];
-	    if (this._modelType === PrecisionModel.FLOATING) { return null }
-	    coord.x = this.makePrecise(coord.x);
-	    coord.y = this.makePrecise(coord.y);
+
+	    if (hits && hits.length && hits[0].match === 'excludeGeneric') return true;
 	  }
-	};
-	PrecisionModel.prototype.getMaximumSignificantDigits = function getMaximumSignificantDigits () {
-	  var maxSigDigits = 16;
-	  if (this._modelType === PrecisionModel.FLOATING) {
-	    maxSigDigits = 16;
-	  } else if (this._modelType === PrecisionModel.FLOATING_SINGLE) {
-	    maxSigDigits = 6;
-	  } else if (this._modelType === PrecisionModel.FIXED) {
-	    maxSigDigits = 1 + Math.trunc(Math.ceil(Math.log(this.getScale()) / Math.log(10)));
-	  }
-	  return maxSigDigits
-	};
-	PrecisionModel.prototype.setScale = function setScale (scale) {
-	  this._scale = Math.abs(scale);
-	};
-	PrecisionModel.prototype.interfaces_ = function interfaces_ () {
-	  return [Serializable, Comparable]
-	};
-	PrecisionModel.prototype.getClass = function getClass () {
-	  return PrecisionModel
-	};
-	PrecisionModel.mostPrecise = function mostPrecise (pm1, pm2) {
-	  if (pm1.compareTo(pm2) >= 0) { return pm1 }
-	  return pm2
-	};
-	staticAccessors$19.serialVersionUID.get = function () { return 7777263578777803835 };
-	staticAccessors$19.maximumPreciseValue.get = function () { return 9007199254740992.0 };
 
-	Object.defineProperties( PrecisionModel, staticAccessors$19 );
+	  return false;
+	} // PUBLIC INTERFACE
 
-	var Type$2 = function Type (name) {
-	  this._name = name || null;
-	  Type.nameToTypeMap.put(name, this);
-	};
 
-	var staticAccessors$1$1 = { serialVersionUID: { configurable: true },nameToTypeMap: { configurable: true } };
-	Type$2.prototype.readResolve = function readResolve () {
-	  return Type$2.nameToTypeMap.get(this._name)
-	};
-	Type$2.prototype.toString = function toString () {
-	  return this._name
-	};
-	Type$2.prototype.interfaces_ = function interfaces_ () {
-	  return [Serializable]
-	};
-	Type$2.prototype.getClass = function getClass () {
-	  return Type$2
-	};
-	staticAccessors$1$1.serialVersionUID.get = function () { return -5528602631731589822 };
-	staticAccessors$1$1.nameToTypeMap.get = function () { return new HashMap() };
-
-	Object.defineProperties( Type$2, staticAccessors$1$1 );
-
-	PrecisionModel.Type = Type$2;
-	PrecisionModel.FIXED = new Type$2('FIXED');
-	PrecisionModel.FLOATING = new Type$2('FLOATING');
-	PrecisionModel.FLOATING_SINGLE = new Type$2('FLOATING SINGLE');
-
-	var GeometryFactory = function GeometryFactory () {
-	  this._precisionModel = new PrecisionModel();
-	  this._SRID = 0;
-	  this._coordinateSequenceFactory = GeometryFactory.getDefaultCoordinateSequenceFactory();
-
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    if (hasInterface(arguments[0], CoordinateSequenceFactory)) {
-	      this._coordinateSequenceFactory = arguments[0];
-	    } else if (arguments[0] instanceof PrecisionModel) {
-	      this._precisionModel = arguments[0];
-	    }
-	  } else if (arguments.length === 2) {
-	    this._precisionModel = arguments[0];
-	    this._SRID = arguments[1];
-	  } else if (arguments.length === 3) {
-	    this._precisionModel = arguments[0];
-	    this._SRID = arguments[1];
-	    this._coordinateSequenceFactory = arguments[2];
-	  }
-	};
+	var serviceNsi = {
+	  // `init()`
+	  // On init, start preparing the name-suggestion-index
+	  //
+	  init: function init() {
+	    // Note: service.init is called immediately after the presetManager has started loading its data.
+	    // We expect to chain onto an unfulfilled promise here.
+	    setNsiSources();
+	    _mainPresetIndex.ensureLoaded().then(function () {
+	      return loadNsiPresets();
+	    }).then(function () {
+	      return delay(100);
+	    }) // wait briefly for locationSets to enter the locationManager queue
+	    .then(function () {
+	      return _mainLocations.mergeLocationSets([]);
+	    }) // wait for locationSets to resolve
+	    .then(function () {
+	      return loadNsiData();
+	    }).then(function () {
+	      return _nsiStatus = 'ok';
+	    })["catch"](function () {
+	      return _nsiStatus = 'failed';
+	    });
 
-	var staticAccessors$2 = { serialVersionUID: { configurable: true } };
-	GeometryFactory.prototype.toGeometry = function toGeometry (envelope) {
-	  if (envelope.isNull()) {
-	    return this.createPoint(null)
-	  }
-	  if (envelope.getMinX() === envelope.getMaxX() && envelope.getMinY() === envelope.getMaxY()) {
-	    return this.createPoint(new Coordinate(envelope.getMinX(), envelope.getMinY()))
-	  }
-	  if (envelope.getMinX() === envelope.getMaxX() || envelope.getMinY() === envelope.getMaxY()) {
-	    return this.createLineString([new Coordinate(envelope.getMinX(), envelope.getMinY()), new Coordinate(envelope.getMaxX(), envelope.getMaxY())])
-	  }
-	  return this.createPolygon(this.createLinearRing([new Coordinate(envelope.getMinX(), envelope.getMinY()), new Coordinate(envelope.getMinX(), envelope.getMaxY()), new Coordinate(envelope.getMaxX(), envelope.getMaxY()), new Coordinate(envelope.getMaxX(), envelope.getMinY()), new Coordinate(envelope.getMinX(), envelope.getMinY())]), null)
-	};
-	GeometryFactory.prototype.createLineString = function createLineString (coordinates) {
-	  if (!coordinates) { return new LineString(this.getCoordinateSequenceFactory().create([]), this) }
-	  else if (coordinates instanceof Array) { return new LineString(this.getCoordinateSequenceFactory().create(coordinates), this) }
-	  else if (hasInterface(coordinates, CoordinateSequence)) { return new LineString(coordinates, this) }
-	};
-	GeometryFactory.prototype.createMultiLineString = function createMultiLineString () {
-	  if (arguments.length === 0) {
-	    return new MultiLineString(null, this)
-	  } else if (arguments.length === 1) {
-	    var lineStrings = arguments[0];
-	    return new MultiLineString(lineStrings, this)
-	  }
-	};
-	GeometryFactory.prototype.buildGeometry = function buildGeometry (geomList) {
-	  var geomClass = null;
-	  var isHeterogeneous = false;
-	  var hasGeometryCollection = false;
-	  for (var i = geomList.iterator(); i.hasNext();) {
-	    var geom = i.next();
-	    var partClass = geom.getClass();
-	    if (geomClass === null) {
-	      geomClass = partClass;
-	    }
-	    if (partClass !== geomClass) {
-	      isHeterogeneous = true;
-	    }
-	    if (geom.isGeometryCollectionOrDerived()) { hasGeometryCollection = true; }
-	  }
-	  if (geomClass === null) {
-	    return this.createGeometryCollection()
-	  }
-	  if (isHeterogeneous || hasGeometryCollection) {
-	    return this.createGeometryCollection(GeometryFactory.toGeometryArray(geomList))
-	  }
-	  var geom0 = geomList.iterator().next();
-	  var isCollection = geomList.size() > 1;
-	  if (isCollection) {
-	    if (geom0 instanceof Polygon) {
-	      return this.createMultiPolygon(GeometryFactory.toPolygonArray(geomList))
-	    } else if (geom0 instanceof LineString) {
-	      return this.createMultiLineString(GeometryFactory.toLineStringArray(geomList))
-	    } else if (geom0 instanceof Point$1) {
-	      return this.createMultiPoint(GeometryFactory.toPointArray(geomList))
-	    }
-	    Assert.shouldNeverReachHere('Unhandled class: ' + geom0.getClass().getName());
-	  }
-	  return geom0
-	};
-	GeometryFactory.prototype.createMultiPointFromCoords = function createMultiPointFromCoords (coordinates) {
-	  return this.createMultiPoint(coordinates !== null ? this.getCoordinateSequenceFactory().create(coordinates) : null)
-	};
-	GeometryFactory.prototype.createPoint = function createPoint () {
-	  if (arguments.length === 0) {
-	    return this.createPoint(this.getCoordinateSequenceFactory().create([]))
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Coordinate) {
-	      var coordinate = arguments[0];
-	      return this.createPoint(coordinate !== null ? this.getCoordinateSequenceFactory().create([coordinate]) : null)
-	    } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordinates = arguments[0];
-	      return new Point$1(coordinates, this)
-	    }
-	  }
-	};
-	GeometryFactory.prototype.getCoordinateSequenceFactory = function getCoordinateSequenceFactory () {
-	  return this._coordinateSequenceFactory
-	};
-	GeometryFactory.prototype.createPolygon = function createPolygon () {
-	  if (arguments.length === 0) {
-	    return new Polygon(null, null, this)
-	  } else if (arguments.length === 1) {
-	    if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordinates = arguments[0];
-	      return this.createPolygon(this.createLinearRing(coordinates))
-	    } else if (arguments[0] instanceof Array) {
-	      var coordinates$1 = arguments[0];
-	      return this.createPolygon(this.createLinearRing(coordinates$1))
-	    } else if (arguments[0] instanceof LinearRing) {
-	      var shell = arguments[0];
-	      return this.createPolygon(shell, null)
-	    }
-	  } else if (arguments.length === 2) {
-	    var shell$1 = arguments[0];
-	    var holes = arguments[1];
-	    return new Polygon(shell$1, holes, this)
-	  }
-	};
-	GeometryFactory.prototype.getSRID = function getSRID () {
-	  return this._SRID
-	};
-	GeometryFactory.prototype.createGeometryCollection = function createGeometryCollection () {
-	  if (arguments.length === 0) {
-	    return new GeometryCollection(null, this)
-	  } else if (arguments.length === 1) {
-	    var geometries = arguments[0];
-	    return new GeometryCollection(geometries, this)
-	  }
-	};
-	GeometryFactory.prototype.createGeometry = function createGeometry (g) {
-	  var editor = new GeometryEditor(this);
-	  return editor.edit(g, {
-	    edit: function () {
-	      if (arguments.length === 2) {
-	        var coordSeq = arguments[0];
-	        // const geometry = arguments[1]
-	        return this._coordinateSequenceFactory.create(coordSeq)
-	      }
-	    }
-	  })
-	};
-	GeometryFactory.prototype.getPrecisionModel = function getPrecisionModel () {
-	  return this._precisionModel
-	};
-	GeometryFactory.prototype.createLinearRing = function createLinearRing () {
-	  if (arguments.length === 0) {
-	    return this.createLinearRing(this.getCoordinateSequenceFactory().create([]))
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Array) {
-	      var coordinates = arguments[0];
-	      return this.createLinearRing(coordinates !== null ? this.getCoordinateSequenceFactory().create(coordinates) : null)
-	    } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordinates$1 = arguments[0];
-	      return new LinearRing(coordinates$1, this)
-	    }
-	  }
-	};
-	GeometryFactory.prototype.createMultiPolygon = function createMultiPolygon () {
-	  if (arguments.length === 0) {
-	    return new MultiPolygon(null, this)
-	  } else if (arguments.length === 1) {
-	    var polygons = arguments[0];
-	    return new MultiPolygon(polygons, this)
-	  }
-	};
-	GeometryFactory.prototype.createMultiPoint = function createMultiPoint () {
-	    var this$1 = this;
-
-	  if (arguments.length === 0) {
-	    return new MultiPoint(null, this)
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Array) {
-	      var point = arguments[0];
-	      return new MultiPoint(point, this)
-	    } else if (arguments[0] instanceof Array) {
-	      var coordinates = arguments[0];
-	      return this.createMultiPoint(coordinates !== null ? this.getCoordinateSequenceFactory().create(coordinates) : null)
-	    } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordinates$1 = arguments[0];
-	      if (coordinates$1 === null) {
-	        return this.createMultiPoint(new Array(0).fill(null))
-	      }
-	      var points = new Array(coordinates$1.size()).fill(null);
-	      for (var i = 0; i < coordinates$1.size(); i++) {
-	        var ptSeq = this$1.getCoordinateSequenceFactory().create(1, coordinates$1.getDimension());
-	        CoordinateSequences.copy(coordinates$1, i, ptSeq, 0, 1);
-	        points[i] = this$1.createPoint(ptSeq);
-	      }
-	      return this.createMultiPoint(points)
+	    function delay(msec) {
+	      return new Promise(function (resolve) {
+	        window.setTimeout(resolve, msec);
+	      });
 	    }
+	  },
+	  // `reset()`
+	  // Reset is called when user saves data to OSM (does nothing here)
+	  //
+	  reset: function reset() {},
+	  // `status()`
+	  // To let other code know how it's going...
+	  //
+	  // Returns
+	  //   `String`: 'loading', 'ok', 'failed'
+	  //
+	  status: function status() {
+	    return _nsiStatus;
+	  },
+	  // `isGenericName()`
+	  // Is the `name` tag generic?
+	  //
+	  // Arguments
+	  //   `tags`: `Object` containing the feature's OSM tags
+	  // Returns
+	  //   `true` if it is generic, `false` if not
+	  //
+	  isGenericName: function isGenericName(tags) {
+	    return _isGenericName(tags);
+	  },
+	  // `upgradeTags()`
+	  // Suggest tag upgrades.
+	  // This function will not modify the input tags, it makes a copy.
+	  //
+	  // Arguments
+	  //   `tags`: `Object` containing the feature's OSM tags
+	  //   `loc`: Location where this feature exists, as a [lon, lat]
+	  // Returns
+	  //   `Object` containing the result, or `null` if no changes needed:
+	  //   {
+	  //     'newTags': `Object` - The tags the the feature should have
+	  //     'matched': `Object` - The matched item
+	  //   }
+	  //
+	  upgradeTags: function upgradeTags(tags, loc) {
+	    return _upgradeTags(tags, loc);
+	  },
+	  // `cache()`
+	  // Direct access to the NSI cache, useful for testing or breaking things
+	  //
+	  // Returns
+	  //   `Object`: the internal NSI cache
+	  //
+	  cache: function cache() {
+	    return _nsi;
 	  }
 	};
-	GeometryFactory.prototype.interfaces_ = function interfaces_ () {
-	  return [Serializable]
-	};
-	GeometryFactory.prototype.getClass = function getClass () {
-	  return GeometryFactory
-	};
-	GeometryFactory.toMultiPolygonArray = function toMultiPolygonArray (multiPolygons) {
-	  var multiPolygonArray = new Array(multiPolygons.size()).fill(null);
-	  return multiPolygons.toArray(multiPolygonArray)
-	};
-	GeometryFactory.toGeometryArray = function toGeometryArray (geometries) {
-	  if (geometries === null) { return null }
-	  var geometryArray = new Array(geometries.size()).fill(null);
-	  return geometries.toArray(geometryArray)
-	};
-	GeometryFactory.getDefaultCoordinateSequenceFactory = function getDefaultCoordinateSequenceFactory () {
-	  return CoordinateArraySequenceFactory.instance()
-	};
-	GeometryFactory.toMultiLineStringArray = function toMultiLineStringArray (multiLineStrings) {
-	  var multiLineStringArray = new Array(multiLineStrings.size()).fill(null);
-	  return multiLineStrings.toArray(multiLineStringArray)
-	};
-	GeometryFactory.toLineStringArray = function toLineStringArray (lineStrings) {
-	  var lineStringArray = new Array(lineStrings.size()).fill(null);
-	  return lineStrings.toArray(lineStringArray)
-	};
-	GeometryFactory.toMultiPointArray = function toMultiPointArray (multiPoints) {
-	  var multiPointArray = new Array(multiPoints.size()).fill(null);
-	  return multiPoints.toArray(multiPointArray)
-	};
-	GeometryFactory.toLinearRingArray = function toLinearRingArray (linearRings) {
-	  var linearRingArray = new Array(linearRings.size()).fill(null);
-	  return linearRings.toArray(linearRingArray)
-	};
-	GeometryFactory.toPointArray = function toPointArray (points) {
-	  var pointArray = new Array(points.size()).fill(null);
-	  return points.toArray(pointArray)
-	};
-	GeometryFactory.toPolygonArray = function toPolygonArray (polygons) {
-	  var polygonArray = new Array(polygons.size()).fill(null);
-	  return polygons.toArray(polygonArray)
-	};
-	GeometryFactory.createPointFromInternalCoord = function createPointFromInternalCoord (coord, exemplar) {
-	  exemplar.getPrecisionModel().makePrecise(coord);
-	  return exemplar.getFactory().createPoint(coord)
-	};
-	staticAccessors$2.serialVersionUID.get = function () { return -6820524753094095635 };
 
-	Object.defineProperties( GeometryFactory, staticAccessors$2 );
+	var apibase$1 = 'https://kartaview.org';
+	var maxResults$1 = 1000;
+	var tileZoom$1 = 14;
+	var tiler$3 = utilTiler().zoomExtent([tileZoom$1, tileZoom$1]).skipNullIsland(true);
+	var dispatch$3 = dispatch$8('loadedImages');
+	var imgZoom = d3_zoom().extent([[0, 0], [320, 240]]).translateExtent([[0, 0], [320, 240]]).scaleExtent([1, 15]);
 
-	var geometryTypes = ['Point', 'MultiPoint', 'LineString', 'MultiLineString', 'Polygon', 'MultiPolygon'];
+	var _oscCache;
 
-	/**
-	 * Class for reading and writing Well-Known Text.Create a new parser for GeoJSON
-	 * NOTE: Adapted from OpenLayers 2.11 implementation.
-	 */
+	var _oscSelectedImage;
 
-	/**
-	 * Create a new parser for GeoJSON
-	 *
-	 * @param {GeometryFactory} geometryFactory
-	 * @return An instance of GeoJsonParser.
-	 * @constructor
-	 * @private
-	 */
-	var GeoJSONParser = function GeoJSONParser (geometryFactory) {
-	  this.geometryFactory = geometryFactory || new GeometryFactory();
-	};
-	/**
-	 * Deserialize a GeoJSON object and return the Geometry or Feature(Collection) with JSTS Geometries
-	 *
-	 * @param {}
-	 *        A GeoJSON object.
-	 * @return {} A Geometry instance or object representing a Feature(Collection) with Geometry instances.
-	 * @private
-	 */
-	GeoJSONParser.prototype.read = function read (json) {
-	  var obj;
-	  if (typeof json === 'string') {
-	    obj = JSON.parse(json);
-	  } else {
-	    obj = json;
-	  }
+	var _loadViewerPromise$1;
 
-	  var type = obj.type;
+	function abortRequest$3(controller) {
+	  controller.abort();
+	}
 
-	  if (!parse$2[type]) {
-	    throw new Error('Unknown GeoJSON type: ' + obj.type)
-	  }
+	function maxPageAtZoom(z) {
+	  if (z < 15) return 2;
+	  if (z === 15) return 5;
+	  if (z === 16) return 10;
+	  if (z === 17) return 20;
+	  if (z === 18) return 40;
+	  if (z > 18) return 80;
+	}
 
-	  if (geometryTypes.indexOf(type) !== -1) {
-	    return parse$2[type].apply(this, [obj.coordinates])
-	  } else if (type === 'GeometryCollection') {
-	    return parse$2[type].apply(this, [obj.geometries])
-	  }
+	function loadTiles$1(which, url, projection) {
+	  var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
+	  var tiles = tiler$3.getTiles(projection); // abort inflight requests that are no longer needed
 
-	  // feature or feature collection
-	  return parse$2[type].apply(this, [obj])
-	};
+	  var cache = _oscCache[which];
+	  Object.keys(cache.inflight).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k.indexOf(tile.id + ',') === 0;
+	    });
 
-	/**
-	 * Serialize a Geometry object into GeoJSON
-	 *
-	 * @param {Geometry}
-	 *        geometry A Geometry or array of Geometries.
-	 * @return {Object} A GeoJSON object represting the input Geometry/Geometries.
-	 * @private
-	 */
-	GeoJSONParser.prototype.write = function write (geometry) {
-	  var type = geometry.getGeometryType();
+	    if (!wanted) {
+	      abortRequest$3(cache.inflight[k]);
+	      delete cache.inflight[k];
+	    }
+	  });
+	  tiles.forEach(function (tile) {
+	    loadNextTilePage$1(which, currZoom, url, tile);
+	  });
+	}
 
-	  if (!extract[type]) {
-	    throw new Error('Geometry is not supported')
-	  }
+	function loadNextTilePage$1(which, currZoom, url, tile) {
+	  var cache = _oscCache[which];
+	  var bbox = tile.extent.bbox();
+	  var maxPages = maxPageAtZoom(currZoom);
+	  var nextPage = cache.nextPage[tile.id] || 1;
+	  var params = utilQsString({
+	    ipp: maxResults$1,
+	    page: nextPage,
+	    // client_id: clientId,
+	    bbTopLeft: [bbox.maxY, bbox.minX].join(','),
+	    bbBottomRight: [bbox.minY, bbox.maxX].join(',')
+	  }, true);
+	  if (nextPage > maxPages) return;
+	  var id = tile.id + ',' + String(nextPage);
+	  if (cache.loaded[id] || cache.inflight[id]) return;
+	  var controller = new AbortController();
+	  cache.inflight[id] = controller;
+	  var options = {
+	    method: 'POST',
+	    signal: controller.signal,
+	    body: params,
+	    headers: {
+	      'Content-Type': 'application/x-www-form-urlencoded'
+	    }
+	  };
+	  d3_json(url, options).then(function (data) {
+	    cache.loaded[id] = true;
+	    delete cache.inflight[id];
 
-	  return extract[type].apply(this, [geometry])
-	};
+	    if (!data || !data.currentPageItems || !data.currentPageItems.length) {
+	      throw new Error('No Data');
+	    }
 
-	var parse$2 = {
-	  /**
-	   * Parse a GeoJSON Feature object
-	   *
-	   * @param {Object}
-	   *          obj Object to parse.
-	   *
-	   * @return {Object} Feature with geometry/bbox converted to JSTS Geometries.
-	   */
-	  Feature: function (obj) {
-	    var feature = {};
+	    var features = data.currentPageItems.map(function (item) {
+	      var loc = [+item.lng, +item.lat];
+	      var d;
 
-	    // copy features
-	    for (var key in obj) {
-	      feature[key] = obj[key];
-	    }
+	      if (which === 'images') {
+	        d = {
+	          loc: loc,
+	          key: item.id,
+	          ca: +item.heading,
+	          captured_at: item.shot_date || item.date_added,
+	          captured_by: item.username,
+	          imagePath: item.lth_name,
+	          sequence_id: item.sequence_id,
+	          sequence_index: +item.sequence_index
+	        }; // cache sequence info
+
+	        var seq = _oscCache.sequences[d.sequence_id];
+
+	        if (!seq) {
+	          seq = {
+	            rotation: 0,
+	            images: []
+	          };
+	          _oscCache.sequences[d.sequence_id] = seq;
+	        }
 
-	    // parse geometry
-	    if (obj.geometry) {
-	      var type = obj.geometry.type;
-	      if (!parse$2[type]) {
-	        throw new Error('Unknown GeoJSON type: ' + obj.type)
+	        seq.images[d.sequence_index] = d;
+	        _oscCache.images.forImageKey[d.key] = d; // cache imageKey -> image
 	      }
-	      feature.geometry = this.read(obj.geometry);
+
+	      return {
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      };
+	    });
+	    cache.rtree.load(features);
+
+	    if (data.currentPageItems.length === maxResults$1) {
+	      // more pages to load
+	      cache.nextPage[tile.id] = nextPage + 1;
+	      loadNextTilePage$1(which, currZoom, url, tile);
+	    } else {
+	      cache.nextPage[tile.id] = Infinity; // no more pages to load
+	    }
+
+	    if (which === 'images') {
+	      dispatch$3.call('loadedImages');
 	    }
+	  })["catch"](function () {
+	    cache.loaded[id] = true;
+	    delete cache.inflight[id];
+	  });
+	} // partition viewport into higher zoom tiles
+
+
+	function partitionViewport$1(projection) {
+	  var z = geoScaleToZoom(projection.scale());
+	  var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
+
+	  var tiler = utilTiler().zoomExtent([z2, z2]);
+	  return tiler.getTiles(projection).map(function (tile) {
+	    return tile.extent;
+	  });
+	} // no more than `limit` results per partition.
+
+
+	function searchLimited$1(limit, projection, rtree) {
+	  limit = limit || 5;
+	  return partitionViewport$1(projection).reduce(function (result, extent) {
+	    var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
+	      return d.data;
+	    });
+	    return found.length ? result.concat(found) : result;
+	  }, []);
+	}
 
-	    // bbox
-	    if (obj.bbox) {
-	      feature.bbox = parse$2.bbox.apply(this, [obj.bbox]);
+	var serviceKartaview = {
+	  init: function init() {
+	    if (!_oscCache) {
+	      this.reset();
 	    }
 
-	    return feature
+	    this.event = utilRebind(this, dispatch$3, 'on');
 	  },
+	  reset: function reset() {
+	    if (_oscCache) {
+	      Object.values(_oscCache.images.inflight).forEach(abortRequest$3);
+	    }
 
-	  /**
-	   * Parse a GeoJSON FeatureCollection object
-	   *
-	   * @param {Object}
-	   *          obj Object to parse.
-	   *
-	   * @return {Object} FeatureCollection with geometry/bbox converted to JSTS Geometries.
-	   */
-	  FeatureCollection: function (obj) {
-	    var this$1 = this;
+	    _oscCache = {
+	      images: {
+	        inflight: {},
+	        loaded: {},
+	        nextPage: {},
+	        rtree: new RBush(),
+	        forImageKey: {}
+	      },
+	      sequences: {}
+	    };
+	    _oscSelectedImage = null;
+	  },
+	  images: function images(projection) {
+	    var limit = 5;
+	    return searchLimited$1(limit, projection, _oscCache.images.rtree);
+	  },
+	  sequences: function sequences(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    var sequenceKeys = {}; // all sequences for images in viewport
 
-	    var featureCollection = {};
+	    _oscCache.images.rtree.search(bbox).forEach(function (d) {
+	      sequenceKeys[d.data.sequence_id] = true;
+	    }); // make linestrings from those sequences
 
-	    if (obj.features) {
-	      featureCollection.features = [];
 
-	      for (var i = 0; i < obj.features.length; ++i) {
-	        featureCollection.features.push(this$1.read(obj.features[i]));
+	    var lineStrings = [];
+	    Object.keys(sequenceKeys).forEach(function (sequenceKey) {
+	      var seq = _oscCache.sequences[sequenceKey];
+	      var images = seq && seq.images;
+
+	      if (images) {
+	        lineStrings.push({
+	          type: 'LineString',
+	          coordinates: images.map(function (d) {
+	            return d.loc;
+	          }).filter(Boolean),
+	          properties: {
+	            captured_at: images[0] ? images[0].captured_at : null,
+	            captured_by: images[0] ? images[0].captured_by : null,
+	            key: sequenceKey
+	          }
+	        });
 	      }
+	    });
+	    return lineStrings;
+	  },
+	  cachedImage: function cachedImage(imageKey) {
+	    return _oscCache.images.forImageKey[imageKey];
+	  },
+	  loadImages: function loadImages(projection) {
+	    var url = apibase$1 + '/1.0/list/nearby-photos/';
+	    loadTiles$1('images', url, projection);
+	  },
+	  ensureViewerLoaded: function ensureViewerLoaded(context) {
+	    if (_loadViewerPromise$1) return _loadViewerPromise$1; // add kartaview-wrapper
+
+	    var wrap = context.container().select('.photoviewer').selectAll('.kartaview-wrapper').data([0]);
+	    var that = this;
+	    var wrapEnter = wrap.enter().append('div').attr('class', 'photo-wrapper kartaview-wrapper').classed('hide', true).call(imgZoom.on('zoom', zoomPan)).on('dblclick.zoom', null);
+	    wrapEnter.append('div').attr('class', 'photo-attribution fillD');
+	    var controlsEnter = wrapEnter.append('div').attr('class', 'photo-controls-wrap').append('div').attr('class', 'photo-controls');
+	    controlsEnter.append('button').on('click.back', step(-1)).text('◄');
+	    controlsEnter.append('button').on('click.rotate-ccw', rotate(-90)).text('⤿');
+	    controlsEnter.append('button').on('click.rotate-cw', rotate(90)).text('⤾');
+	    controlsEnter.append('button').on('click.forward', step(1)).text('►');
+	    wrapEnter.append('div').attr('class', 'kartaview-image-wrap'); // Register viewer resize handler
+
+	    context.ui().photoviewer.on('resize.kartaview', function (dimensions) {
+	      imgZoom = d3_zoom().extent([[0, 0], dimensions]).translateExtent([[0, 0], dimensions]).scaleExtent([1, 15]).on('zoom', zoomPan);
+	    });
+
+	    function zoomPan(d3_event) {
+	      var t = d3_event.transform;
+	      context.container().select('.photoviewer .kartaview-image-wrap').call(utilSetTransform, t.x, t.y, t.k);
 	    }
 
-	    if (obj.bbox) {
-	      featureCollection.bbox = this.parse.bbox.apply(this, [obj.bbox]);
+	    function rotate(deg) {
+	      return function () {
+	        if (!_oscSelectedImage) return;
+	        var sequenceKey = _oscSelectedImage.sequence_id;
+	        var sequence = _oscCache.sequences[sequenceKey];
+	        if (!sequence) return;
+	        var r = sequence.rotation || 0;
+	        r += deg;
+	        if (r > 180) r -= 360;
+	        if (r < -180) r += 360;
+	        sequence.rotation = r;
+	        var wrap = context.container().select('.photoviewer .kartaview-wrapper');
+	        wrap.transition().duration(100).call(imgZoom.transform, identity$2);
+	        wrap.selectAll('.kartaview-image').transition().duration(100).style('transform', 'rotate(' + r + 'deg)');
+	      };
 	    }
 
-	    return featureCollection
+	    function step(stepBy) {
+	      return function () {
+	        if (!_oscSelectedImage) return;
+	        var sequenceKey = _oscSelectedImage.sequence_id;
+	        var sequence = _oscCache.sequences[sequenceKey];
+	        if (!sequence) return;
+	        var nextIndex = _oscSelectedImage.sequence_index + stepBy;
+	        var nextImage = sequence.images[nextIndex];
+	        if (!nextImage) return;
+	        context.map().centerEase(nextImage.loc);
+	        that.selectImage(context, nextImage.key);
+	      };
+	    } // don't need any async loading so resolve immediately
+
+
+	    _loadViewerPromise$1 = Promise.resolve();
+	    return _loadViewerPromise$1;
 	  },
+	  showViewer: function showViewer(context) {
+	    var viewer = context.container().select('.photoviewer').classed('hide', false);
+	    var isHidden = viewer.selectAll('.photo-wrapper.kartaview-wrapper.hide').size();
 
-	  /**
-	   * Convert the ordinates in an array to an array of Coordinates
-	   *
-	   * @param {Array}
-	   *          array Array with {Number}s.
-	   *
-	   * @return {Array} Array with Coordinates.
-	   */
-	  coordinates: function (array) {
-	    var coordinates = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      var sub = array[i];
-	      coordinates.push(new Coordinate(sub[0], sub[1]));
+	    if (isHidden) {
+	      viewer.selectAll('.photo-wrapper:not(.kartaview-wrapper)').classed('hide', true);
+	      viewer.selectAll('.photo-wrapper.kartaview-wrapper').classed('hide', false);
 	    }
-	    return coordinates
-	  },
 
-	  /**
-	   * Convert the bbox to a LinearRing
-	   *
-	   * @param {Array}
-	   *          array Array with [xMin, yMin, xMax, yMax].
-	   *
-	   * @return {Array} Array with Coordinates.
-	   */
-	  bbox: function (array) {
-	    return this.geometryFactory.createLinearRing([
-	      new Coordinate(array[0], array[1]),
-	      new Coordinate(array[2], array[1]),
-	      new Coordinate(array[2], array[3]),
-	      new Coordinate(array[0], array[3]),
-	      new Coordinate(array[0], array[1])
-	    ])
+	    return this;
 	  },
-
-	  /**
-	   * Convert an Array with ordinates to a Point
-	   *
-	   * @param {Array}
-	   *          array Array with ordinates.
-	   *
-	   * @return {Point} Point.
-	   */
-	  Point: function (array) {
-	    var coordinate = new Coordinate(array[0], array[1]);
-	    return this.geometryFactory.createPoint(coordinate)
+	  hideViewer: function hideViewer(context) {
+	    _oscSelectedImage = null;
+	    this.updateUrlImage(null);
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(null);
+	    viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+	    context.container().selectAll('.viewfield-group, .sequence, .icon-sign').classed('currentView', false);
+	    return this.setStyles(context, null, true);
 	  },
+	  selectImage: function selectImage(context, imageKey) {
+	    var d = this.cachedImage(imageKey);
+	    _oscSelectedImage = d;
+	    this.updateUrlImage(imageKey);
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(d);
+	    this.setStyles(context, null, true);
+	    context.container().selectAll('.icon-sign').classed('currentView', false);
+	    if (!d) return this;
+	    var wrap = context.container().select('.photoviewer .kartaview-wrapper');
+	    var imageWrap = wrap.selectAll('.kartaview-image-wrap');
+	    var attribution = wrap.selectAll('.photo-attribution').text('');
+	    wrap.transition().duration(100).call(imgZoom.transform, identity$2);
+	    imageWrap.selectAll('.kartaview-image').remove();
+
+	    if (d) {
+	      var sequence = _oscCache.sequences[d.sequence_id];
+	      var r = sequence && sequence.rotation || 0;
+	      imageWrap.append('img').attr('class', 'kartaview-image').attr('src', apibase$1 + '/' + d.imagePath).style('transform', 'rotate(' + r + 'deg)');
+
+	      if (d.captured_by) {
+	        attribution.append('a').attr('class', 'captured_by').attr('target', '_blank').attr('href', 'https://kartaview.org/user/' + encodeURIComponent(d.captured_by)).text('@' + d.captured_by);
+	        attribution.append('span').text('|');
+	      }
 
-	  /**
-	   * Convert an Array with coordinates to a MultiPoint
-	   *
-	   * @param {Array}
-	   *          array Array with coordinates.
-	   *
-	   * @return {MultiPoint} MultiPoint.
-	   */
-	  MultiPoint: function (array) {
-	    var this$1 = this;
+	      if (d.captured_at) {
+	        attribution.append('span').attr('class', 'captured_at').text(localeDateString(d.captured_at));
+	        attribution.append('span').text('|');
+	      }
 
-	    var points = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      points.push(parse$2.Point.apply(this$1, [array[i]]));
+	      attribution.append('a').attr('class', 'image-link').attr('target', '_blank').attr('href', 'https://kartaview.org/details/' + d.sequence_id + '/' + d.sequence_index).text('kartaview.org');
+	    }
+
+	    return this;
+
+	    function localeDateString(s) {
+	      if (!s) return null;
+	      var options = {
+	        day: 'numeric',
+	        month: 'short',
+	        year: 'numeric'
+	      };
+	      var d = new Date(s);
+	      if (isNaN(d.getTime())) return null;
+	      return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
 	    }
-	    return this.geometryFactory.createMultiPoint(points)
 	  },
+	  getSelectedImage: function getSelectedImage() {
+	    return _oscSelectedImage;
+	  },
+	  getSequenceKeyForImage: function getSequenceKeyForImage(d) {
+	    return d && d.sequence_id;
+	  },
+	  // Updates the currently highlighted sequence and selected bubble.
+	  // Reset is only necessary when interacting with the viewport because
+	  // this implicitly changes the currently selected bubble/sequence
+	  setStyles: function setStyles(context, hovered, reset) {
+	    if (reset) {
+	      // reset all layers
+	      context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false).classed('currentView', false);
+	      context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
+	    }
+
+	    var hoveredImageKey = hovered && hovered.key;
+	    var hoveredSequenceKey = this.getSequenceKeyForImage(hovered);
+	    var hoveredSequence = hoveredSequenceKey && _oscCache.sequences[hoveredSequenceKey];
+	    var hoveredImageKeys = hoveredSequence && hoveredSequence.images.map(function (d) {
+	      return d.key;
+	    }) || [];
+	    var viewer = context.container().select('.photoviewer');
+	    var selected = viewer.empty() ? undefined : viewer.datum();
+	    var selectedImageKey = selected && selected.key;
+	    var selectedSequenceKey = this.getSequenceKeyForImage(selected);
+	    var selectedSequence = selectedSequenceKey && _oscCache.sequences[selectedSequenceKey];
+	    var selectedImageKeys = selectedSequence && selectedSequence.images.map(function (d) {
+	      return d.key;
+	    }) || []; // highlight sibling viewfields on either the selected or the hovered sequences
+
+	    var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
+	    context.container().selectAll('.layer-kartaview .viewfield-group').classed('highlighted', function (d) {
+	      return highlightedImageKeys.indexOf(d.key) !== -1;
+	    }).classed('hovered', function (d) {
+	      return d.key === hoveredImageKey;
+	    }).classed('currentView', function (d) {
+	      return d.key === selectedImageKey;
+	    });
+	    context.container().selectAll('.layer-kartaview .sequence').classed('highlighted', function (d) {
+	      return d.properties.key === hoveredSequenceKey;
+	    }).classed('currentView', function (d) {
+	      return d.properties.key === selectedSequenceKey;
+	    }); // update viewfields if needed
 
-	  /**
-	   * Convert an Array with coordinates to a LineString
-	   *
-	   * @param {Array}
-	   *          array Array with coordinates.
-	   *
-	   * @return {LineString} LineString.
-	   */
-	  LineString: function (array) {
-	    var coordinates = parse$2.coordinates.apply(this, [array]);
-	    return this.geometryFactory.createLineString(coordinates)
+	    context.container().selectAll('.layer-kartaview .viewfield-group .viewfield').attr('d', viewfieldPath);
+
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
+
+	      if (d.pano && d.key !== selectedImageKey) {
+	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+	      } else {
+	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	      }
+	    }
+
+	    return this;
 	  },
+	  updateUrlImage: function updateUrlImage(imageKey) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	  /**
-	   * Convert an Array with coordinates to a MultiLineString
-	   *
-	   * @param {Array}
-	   *          array Array with coordinates.
-	   *
-	   * @return {MultiLineString} MultiLineString.
-	   */
-	  MultiLineString: function (array) {
-	    var this$1 = this;
+	      if (imageKey) {
+	        hash.photo = 'kartaview/' + imageKey;
+	      } else {
+	        delete hash.photo;
+	      }
 
-	    var lineStrings = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      lineStrings.push(parse$2.LineString.apply(this$1, [array[i]]));
+	      window.location.replace('#' + utilQsString(hash, true));
 	    }
-	    return this.geometryFactory.createMultiLineString(lineStrings)
 	  },
+	  cache: function cache() {
+	    return _oscCache;
+	  }
+	};
 
-	  /**
-	   * Convert an Array to a Polygon
-	   *
-	   * @param {Array}
-	   *          array Array with shell and holes.
-	   *
-	   * @return {Polygon} Polygon.
-	   */
-	  Polygon: function (array) {
-	    var this$1 = this;
+	var hashes$1 = {exports: {}};
 
-	    var shellCoordinates = parse$2.coordinates.apply(this, [array[0]]);
-	    var shell = this.geometryFactory.createLinearRing(shellCoordinates);
-	    var holes = [];
-	    for (var i = 1; i < array.length; ++i) {
-	      var hole = array[i];
-	      var coordinates = parse$2.coordinates.apply(this$1, [hole]);
-	      var linearRing = this$1.geometryFactory.createLinearRing(coordinates);
-	      holes.push(linearRing);
-	    }
-	    return this.geometryFactory.createPolygon(shell, holes)
-	  },
+	(function (module, exports) {
+	  (function () {
+	    var Hashes;
 
-	  /**
-	   * Convert an Array to a MultiPolygon
-	   *
-	   * @param {Array}
-	   *          array Array of arrays with shell and rings.
-	   *
-	   * @return {MultiPolygon} MultiPolygon.
-	   */
-	  MultiPolygon: function (array) {
-	    var this$1 = this;
+	    function utf8Encode(str) {
+	      var x,
+	          y,
+	          output = '',
+	          i = -1,
+	          l;
 
-	    var polygons = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      var polygon = array[i];
-	      polygons.push(parse$2.Polygon.apply(this$1, [polygon]));
-	    }
-	    return this.geometryFactory.createMultiPolygon(polygons)
-	  },
+	      if (str && str.length) {
+	        l = str.length;
 
-	  /**
-	   * Convert an Array to a GeometryCollection
-	   *
-	   * @param {Array}
-	   *          array Array of GeoJSON geometries.
-	   *
-	   * @return {GeometryCollection} GeometryCollection.
-	   */
-	  GeometryCollection: function (array) {
-	    var this$1 = this;
+	        while ((i += 1) < l) {
+	          /* Decode utf-16 surrogate pairs */
+	          x = str.charCodeAt(i);
+	          y = i + 1 < l ? str.charCodeAt(i + 1) : 0;
 
-	    var geometries = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      var geometry = array[i];
-	      geometries.push(this$1.read(geometry));
-	    }
-	    return this.geometryFactory.createGeometryCollection(geometries)
-	  }
-	};
+	          if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
+	            x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
+	            i += 1;
+	          }
+	          /* Encode output as utf-8 */
 
-	var extract = {
-	  /**
-	   * Convert a Coordinate to an Array
-	   *
-	   * @param {Coordinate}
-	   *          coordinate Coordinate to convert.
-	   *
-	   * @return {Array} Array of ordinates.
-	   */
-	  coordinate: function (coordinate) {
-	    return [coordinate.x, coordinate.y]
-	  },
 
-	  /**
-	   * Convert a Point to a GeoJSON object
-	   *
-	   * @param {Point}
-	   *          point Point to convert.
-	   *
-	   * @return {Array} Array of 2 ordinates (paired to a coordinate).
-	   */
-	  Point: function (point) {
-	    var array = extract.coordinate.apply(this, [point.getCoordinate()]);
-	    return {
-	      type: 'Point',
-	      coordinates: array
+	          if (x <= 0x7F) {
+	            output += String.fromCharCode(x);
+	          } else if (x <= 0x7FF) {
+	            output += String.fromCharCode(0xC0 | x >>> 6 & 0x1F, 0x80 | x & 0x3F);
+	          } else if (x <= 0xFFFF) {
+	            output += String.fromCharCode(0xE0 | x >>> 12 & 0x0F, 0x80 | x >>> 6 & 0x3F, 0x80 | x & 0x3F);
+	          } else if (x <= 0x1FFFFF) {
+	            output += String.fromCharCode(0xF0 | x >>> 18 & 0x07, 0x80 | x >>> 12 & 0x3F, 0x80 | x >>> 6 & 0x3F, 0x80 | x & 0x3F);
+	          }
+	        }
+	      }
+
+	      return output;
 	    }
-	  },
 
-	  /**
-	   * Convert a MultiPoint to a GeoJSON object
-	   *
-	   * @param {MultiPoint}
-	   *          multipoint MultiPoint to convert.
-	   *
-	   * @return {Array} Array of coordinates.
-	   */
-	  MultiPoint: function (multipoint) {
-	    var this$1 = this;
+	    function utf8Decode(str) {
+	      var i,
+	          ac,
+	          c1,
+	          c2,
+	          c3,
+	          arr = [],
+	          l;
+	      i = ac = c1 = c2 = c3 = 0;
 
-	    var array = [];
-	    for (var i = 0; i < multipoint._geometries.length; ++i) {
-	      var point = multipoint._geometries[i];
-	      var geoJson = extract.Point.apply(this$1, [point]);
-	      array.push(geoJson.coordinates);
-	    }
-	    return {
-	      type: 'MultiPoint',
-	      coordinates: array
-	    }
-	  },
+	      if (str && str.length) {
+	        l = str.length;
+	        str += '';
 
-	  /**
-	   * Convert a LineString to a GeoJSON object
-	   *
-	   * @param {LineString}
-	   *          linestring LineString to convert.
-	   *
-	   * @return {Array} Array of coordinates.
-	   */
-	  LineString: function (linestring) {
-	    var this$1 = this;
+	        while (i < l) {
+	          c1 = str.charCodeAt(i);
+	          ac += 1;
 
-	    var array = [];
-	    var coordinates = linestring.getCoordinates();
-	    for (var i = 0; i < coordinates.length; ++i) {
-	      var coordinate = coordinates[i];
-	      array.push(extract.coordinate.apply(this$1, [coordinate]));
-	    }
-	    return {
-	      type: 'LineString',
-	      coordinates: array
+	          if (c1 < 128) {
+	            arr[ac] = String.fromCharCode(c1);
+	            i += 1;
+	          } else if (c1 > 191 && c1 < 224) {
+	            c2 = str.charCodeAt(i + 1);
+	            arr[ac] = String.fromCharCode((c1 & 31) << 6 | c2 & 63);
+	            i += 2;
+	          } else {
+	            c2 = str.charCodeAt(i + 1);
+	            c3 = str.charCodeAt(i + 2);
+	            arr[ac] = String.fromCharCode((c1 & 15) << 12 | (c2 & 63) << 6 | c3 & 63);
+	            i += 3;
+	          }
+	        }
+	      }
+
+	      return arr.join('');
 	    }
-	  },
+	    /**
+	     * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+	     * to work around bugs in some JS interpreters.
+	     */
 
-	  /**
-	   * Convert a MultiLineString to a GeoJSON object
-	   *
-	   * @param {MultiLineString}
-	   *          multilinestring MultiLineString to convert.
-	   *
-	   * @return {Array} Array of Array of coordinates.
-	   */
-	  MultiLineString: function (multilinestring) {
-	    var this$1 = this;
 
-	    var array = [];
-	    for (var i = 0; i < multilinestring._geometries.length; ++i) {
-	      var linestring = multilinestring._geometries[i];
-	      var geoJson = extract.LineString.apply(this$1, [linestring]);
-	      array.push(geoJson.coordinates);
+	    function safe_add(x, y) {
+	      var lsw = (x & 0xFFFF) + (y & 0xFFFF),
+	          msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+	      return msw << 16 | lsw & 0xFFFF;
 	    }
-	    return {
-	      type: 'MultiLineString',
-	      coordinates: array
-	    }
-	  },
+	    /**
+	     * Bitwise rotate a 32-bit number to the left.
+	     */
 
-	  /**
-	   * Convert a Polygon to a GeoJSON object
-	   *
-	   * @param {Polygon}
-	   *          polygon Polygon to convert.
-	   *
-	   * @return {Array} Array with shell, holes.
-	   */
-	  Polygon: function (polygon) {
-	    var this$1 = this;
 
-	    var array = [];
-	    var shellGeoJson = extract.LineString.apply(this, [polygon._shell]);
-	    array.push(shellGeoJson.coordinates);
-	    for (var i = 0; i < polygon._holes.length; ++i) {
-	      var hole = polygon._holes[i];
-	      var holeGeoJson = extract.LineString.apply(this$1, [hole]);
-	      array.push(holeGeoJson.coordinates);
-	    }
-	    return {
-	      type: 'Polygon',
-	      coordinates: array
+	    function bit_rol(num, cnt) {
+	      return num << cnt | num >>> 32 - cnt;
 	    }
-	  },
+	    /**
+	     * Convert a raw string to a hex string
+	     */
 
-	  /**
-	   * Convert a MultiPolygon to a GeoJSON object
-	   *
-	   * @param {MultiPolygon}
-	   *          multipolygon MultiPolygon to convert.
-	   *
-	   * @return {Array} Array of polygons.
-	   */
-	  MultiPolygon: function (multipolygon) {
-	    var this$1 = this;
 
-	    var array = [];
-	    for (var i = 0; i < multipolygon._geometries.length; ++i) {
-	      var polygon = multipolygon._geometries[i];
-	      var geoJson = extract.Polygon.apply(this$1, [polygon]);
-	      array.push(geoJson.coordinates);
-	    }
-	    return {
-	      type: 'MultiPolygon',
-	      coordinates: array
-	    }
-	  },
+	    function rstr2hex(input, hexcase) {
+	      var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
+	          output = '',
+	          x,
+	          i = 0,
+	          l = input.length;
 
-	  /**
-	   * Convert a GeometryCollection to a GeoJSON object
-	   *
-	   * @param {GeometryCollection}
-	   *          collection GeometryCollection to convert.
-	   *
-	   * @return {Array} Array of geometries.
-	   */
-	  GeometryCollection: function (collection) {
-	    var this$1 = this;
+	      for (; i < l; i += 1) {
+	        x = input.charCodeAt(i);
+	        output += hex_tab.charAt(x >>> 4 & 0x0F) + hex_tab.charAt(x & 0x0F);
+	      }
 
-	    var array = [];
-	    for (var i = 0; i < collection._geometries.length; ++i) {
-	      var geometry = collection._geometries[i];
-	      var type = geometry.getGeometryType();
-	      array.push(extract[type].apply(this$1, [geometry]));
-	    }
-	    return {
-	      type: 'GeometryCollection',
-	      geometries: array
+	      return output;
 	    }
-	  }
-	};
+	    /**
+	     * Convert an array of big-endian words to a string
+	     */
 
-	/**
-	 * Converts a geometry in GeoJSON to a {@link Geometry}.
-	 */
 
-	/**
-	 * A <code>GeoJSONReader</code> is parameterized by a <code>GeometryFactory</code>,
-	 * to allow it to create <code>Geometry</code> objects of the appropriate
-	 * implementation. In particular, the <code>GeometryFactory</code> determines
-	 * the <code>PrecisionModel</code> and <code>SRID</code> that is used.
-	 *
-	 * @param {GeometryFactory} geometryFactory
-	 * @constructor
-	 */
-	var GeoJSONReader = function GeoJSONReader (geometryFactory) {
-	  this.geometryFactory = geometryFactory || new GeometryFactory();
-	  this.precisionModel = this.geometryFactory.getPrecisionModel();
-	  this.parser = new GeoJSONParser(this.geometryFactory);
-	};
-	/**
-	 * Reads a GeoJSON representation of a {@link Geometry}
-	 *
-	 * Will also parse GeoJSON Features/FeatureCollections as custom objects.
-	 *
-	 * @param {Object|String} geoJson a GeoJSON Object or String.
-	 * @return {Geometry|Object} a <code>Geometry or Feature/FeatureCollection representation.</code>
-	 * @memberof GeoJSONReader
-	 */
-	GeoJSONReader.prototype.read = function read (geoJson) {
-	  var geometry = this.parser.read(geoJson);
+	    function binb2rstr(input) {
+	      var i,
+	          l = input.length * 32,
+	          output = '';
 
-	  if (this.precisionModel.getType() === PrecisionModel.FIXED) {
-	    this.reducePrecision(geometry);
-	  }
+	      for (i = 0; i < l; i += 8) {
+	        output += String.fromCharCode(input[i >> 5] >>> 24 - i % 32 & 0xFF);
+	      }
 
-	  return geometry
-	};
+	      return output;
+	    }
+	    /**
+	     * Convert an array of little-endian words to a string
+	     */
 
-	// NOTE: this is a hack
-	GeoJSONReader.prototype.reducePrecision = function reducePrecision (geometry) {
-	    var this$1 = this;
 
-	  var i, len;
+	    function binl2rstr(input) {
+	      var i,
+	          l = input.length * 32,
+	          output = '';
 
-	  if (geometry.coordinate) {
-	    this.precisionModel.makePrecise(geometry.coordinate);
-	  } else if (geometry.points) {
-	    for (i = 0, len = geometry.points.length; i < len; i++) {
-	      this$1.precisionModel.makePrecise(geometry.points[i]);
-	    }
-	  } else if (geometry.geometries) {
-	    for (i = 0, len = geometry.geometries.length; i < len; i++) {
-	      this$1.reducePrecision(geometry.geometries[i]);
+	      for (i = 0; i < l; i += 8) {
+	        output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+	      }
+
+	      return output;
 	    }
-	  }
-	};
+	    /**
+	     * Convert a raw string to an array of little-endian words
+	     * Characters >255 have their high-byte silently ignored.
+	     */
 
-	/**
-	 * @module GeoJSONWriter
-	 */
 
-	/**
-	 * Writes the GeoJSON representation of a {@link Geometry}. The
-	 * The GeoJSON format is defined <A
-	 * HREF="http://geojson.org/geojson-spec.html">here</A>.
-	 */
+	    function rstr2binl(input) {
+	      var i,
+	          l = input.length * 8,
+	          output = Array(input.length >> 2),
+	          lo = output.length;
 
-	/**
-	 * The <code>GeoJSONWriter</code> outputs coordinates rounded to the precision
-	 * model. Only the maximum number of decimal places necessary to represent the
-	 * ordinates to the required precision will be output.
-	 *
-	 * @param {GeometryFactory} geometryFactory
-	 * @constructor
-	 */
-	var GeoJSONWriter = function GeoJSONWriter () {
-	  this.parser = new GeoJSONParser(this.geometryFactory);
-	};
-	/**
-	 * Converts a <code>Geometry</code> to its GeoJSON representation.
-	 *
-	 * @param {Geometry}
-	 *        geometry a <code>Geometry</code> to process.
-	 * @return {Object} The GeoJSON representation of the Geometry.
-	 * @memberof GeoJSONWriter
-	 */
-	GeoJSONWriter.prototype.write = function write (geometry) {
-	  return this.parser.write(geometry)
-	};
+	      for (i = 0; i < lo; i += 1) {
+	        output[i] = 0;
+	      }
 
-	/* eslint-disable no-undef */
+	      for (i = 0; i < l; i += 8) {
+	        output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << i % 32;
+	      }
 
-	// io
+	      return output;
+	    }
+	    /**
+	     * Convert a raw string to an array of big-endian words
+	     * Characters >255 have their high-byte silently ignored.
+	     */
 
-	var Position = function Position () {};
 
-	var staticAccessors$20 = { ON: { configurable: true },LEFT: { configurable: true },RIGHT: { configurable: true } };
+	    function rstr2binb(input) {
+	      var i,
+	          l = input.length * 8,
+	          output = Array(input.length >> 2),
+	          lo = output.length;
 
-	Position.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Position.prototype.getClass = function getClass () {
-	  return Position
-	};
-	Position.opposite = function opposite (position) {
-	  if (position === Position.LEFT) { return Position.RIGHT }
-	  if (position === Position.RIGHT) { return Position.LEFT }
-	  return position
-	};
-	staticAccessors$20.ON.get = function () { return 0 };
-	staticAccessors$20.LEFT.get = function () { return 1 };
-	staticAccessors$20.RIGHT.get = function () { return 2 };
+	      for (i = 0; i < lo; i += 1) {
+	        output[i] = 0;
+	      }
 
-	Object.defineProperties( Position, staticAccessors$20 );
+	      for (i = 0; i < l; i += 8) {
+	        output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << 24 - i % 32;
+	      }
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function EmptyStackException (message) {
-	  this.message = message || '';
-	}
-	EmptyStackException.prototype = new Error();
+	      return output;
+	    }
+	    /**
+	     * Convert a raw string to an arbitrary string encoding
+	     */
 
-	/**
-	 * @type {string}
-	 */
-	EmptyStackException.prototype.name = 'EmptyStackException';
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Stack.html
-	 *
-	 * @extends {List}
-	 * @constructor
-	 * @private
-	 */
-	function Stack () {
-	  /**
-	   * @type {Array}
-	   * @private
-	   */
-	  this.array_ = [];
-	}
-	Stack.prototype = new List();
+	    function rstr2any(input, encoding) {
+	      var divisor = encoding.length,
+	          remainders = Array(),
+	          i,
+	          q,
+	          x,
+	          ld,
+	          quotient,
+	          dividend,
+	          output,
+	          full_length;
+	      /* Convert to an array of 16-bit big-endian values, forming the dividend */
+
+	      dividend = Array(Math.ceil(input.length / 2));
+	      ld = dividend.length;
+
+	      for (i = 0; i < ld; i += 1) {
+	        dividend[i] = input.charCodeAt(i * 2) << 8 | input.charCodeAt(i * 2 + 1);
+	      }
+	      /**
+	       * Repeatedly perform a long division. The binary array forms the dividend,
+	       * the length of the encoding is the divisor. Once computed, the quotient
+	       * forms the dividend for the next step. We stop when the dividend is zerHashes.
+	       * All remainders are stored for later use.
+	       */
 
-	/**
-	 * @override
-	 */
-	Stack.prototype.add = function (e) {
-	  this.array_.push(e);
-	  return true
-	};
 
-	/**
-	 * @override
-	 */
-	Stack.prototype.get = function (index) {
-	  if (index < 0 || index >= this.size()) {
-	    throw new Error()
-	  }
+	      while (dividend.length > 0) {
+	        quotient = Array();
+	        x = 0;
 
-	  return this.array_[index]
-	};
+	        for (i = 0; i < dividend.length; i += 1) {
+	          x = (x << 16) + dividend[i];
+	          q = Math.floor(x / divisor);
+	          x -= q * divisor;
 
-	/**
-	 * Pushes an item onto the top of this stack.
-	 * @param {Object} e
-	 * @return {Object}
-	 */
-	Stack.prototype.push = function (e) {
-	  this.array_.push(e);
-	  return e
-	};
+	          if (quotient.length > 0 || q > 0) {
+	            quotient[quotient.length] = q;
+	          }
+	        }
 
-	/**
-	 * Pushes an item onto the top of this stack.
-	 * @param {Object} e
-	 * @return {Object}
-	 */
-	Stack.prototype.pop = function (e) {
-	  if (this.array_.length === 0) {
-	    throw new EmptyStackException()
-	  }
+	        remainders[remainders.length] = x;
+	        dividend = quotient;
+	      }
+	      /* Convert the remainders to the output string */
 
-	  return this.array_.pop()
-	};
 
-	/**
-	 * Looks at the object at the top of this stack without removing it from the
-	 * stack.
-	 * @return {Object}
-	 */
-	Stack.prototype.peek = function () {
-	  if (this.array_.length === 0) {
-	    throw new EmptyStackException()
-	  }
+	      output = '';
 
-	  return this.array_[this.array_.length - 1]
-	};
+	      for (i = remainders.length - 1; i >= 0; i--) {
+	        output += encoding.charAt(remainders[i]);
+	      }
+	      /* Append leading zero equivalents */
 
-	/**
-	 * Tests if this stack is empty.
-	 * @return {boolean} true if and only if this stack contains no items; false
-	 *         otherwise.
-	 */
-	Stack.prototype.empty = function () {
-	  if (this.array_.length === 0) {
-	    return true
-	  } else {
-	    return false
-	  }
-	};
 
-	/**
-	 * @return {boolean}
-	 */
-	Stack.prototype.isEmpty = function () {
-	  return this.empty()
-	};
+	      full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
 
-	/**
-	 * Returns the 1-based position where an object is on this stack. If the object
-	 * o occurs as an item in this stack, this method returns the distance from the
-	 * top of the stack of the occurrence nearest the top of the stack; the topmost
-	 * item on the stack is considered to be at distance 1. The equals method is
-	 * used to compare o to the items in this stack.
-	 *
-	 * NOTE: does not currently actually use equals. (=== is used)
-	 *
-	 * @param {Object} o
-	 * @return {number} the 1-based position from the top of the stack where the
-	 *         object is located; the return value -1 indicates that the object is
-	 *         not on the stack.
-	 */
-	Stack.prototype.search = function (o) {
-	  return this.array_.indexOf(o)
-	};
+	      for (i = output.length; i < full_length; i += 1) {
+	        output = encoding[0] + output;
+	      }
 
-	/**
-	 * @return {number}
-	 * @export
-	 */
-	Stack.prototype.size = function () {
-	  return this.array_.length
-	};
+	      return output;
+	    }
+	    /**
+	     * Convert a raw string to a base-64 string
+	     */
 
-	/**
-	 * @return {Array}
-	 */
-	Stack.prototype.toArray = function () {
-	  var this$1 = this;
 
-	  var array = [];
+	    function rstr2b64(input, b64pad) {
+	      var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
+	          output = '',
+	          len = input.length,
+	          i,
+	          j,
+	          triplet;
+	      b64pad = b64pad || '=';
+
+	      for (i = 0; i < len; i += 3) {
+	        triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
+
+	        for (j = 0; j < 4; j += 1) {
+	          if (i * 8 + j * 6 > input.length * 8) {
+	            output += b64pad;
+	          } else {
+	            output += tab.charAt(triplet >>> 6 * (3 - j) & 0x3F);
+	          }
+	        }
+	      }
 
-	  for (var i = 0, len = this.array_.length; i < len; i++) {
-	    array.push(this$1.array_[i]);
-	  }
+	      return output;
+	    }
 
-	  return array
-	};
+	    Hashes = {
+	      /**
+	       * @property {String} version
+	       * @readonly
+	       */
+	      VERSION: '1.0.6',
 
-	var RightmostEdgeFinder = function RightmostEdgeFinder () {
-	  this._minIndex = -1;
-	  this._minCoord = null;
-	  this._minDe = null;
-	  this._orientedDe = null;
-	};
-	RightmostEdgeFinder.prototype.getCoordinate = function getCoordinate () {
-	  return this._minCoord
-	};
-	RightmostEdgeFinder.prototype.getRightmostSide = function getRightmostSide (de, index) {
-	  var side = this.getRightmostSideOfSegment(de, index);
-	  if (side < 0) { side = this.getRightmostSideOfSegment(de, index - 1); }
-	  if (side < 0) {
-	    this._minCoord = null;
-	    this.checkForRightmostCoordinate(de);
-	  }
-	  return side
-	};
-	RightmostEdgeFinder.prototype.findRightmostEdgeAtVertex = function findRightmostEdgeAtVertex () {
-	  var pts = this._minDe.getEdge().getCoordinates();
-	  Assert.isTrue(this._minIndex > 0 && this._minIndex < pts.length, 'rightmost point expected to be interior vertex of edge');
-	  var pPrev = pts[this._minIndex - 1];
-	  var pNext = pts[this._minIndex + 1];
-	  var orientation = CGAlgorithms.computeOrientation(this._minCoord, pNext, pPrev);
-	  var usePrev = false;
-	  if (pPrev.y < this._minCoord.y && pNext.y < this._minCoord.y && orientation === CGAlgorithms.COUNTERCLOCKWISE) {
-	    usePrev = true;
-	  } else if (pPrev.y > this._minCoord.y && pNext.y > this._minCoord.y && orientation === CGAlgorithms.CLOCKWISE) {
-	    usePrev = true;
-	  }
-	  if (usePrev) {
-	    this._minIndex = this._minIndex - 1;
-	  }
-	};
-	RightmostEdgeFinder.prototype.getRightmostSideOfSegment = function getRightmostSideOfSegment (de, i) {
-	  var e = de.getEdge();
-	  var coord = e.getCoordinates();
-	  if (i < 0 || i + 1 >= coord.length) { return -1 }
-	  if (coord[i].y === coord[i + 1].y) { return -1 }
-	  var pos = Position.LEFT;
-	  if (coord[i].y < coord[i + 1].y) { pos = Position.RIGHT; }
-	  return pos
-	};
-	RightmostEdgeFinder.prototype.getEdge = function getEdge () {
-	  return this._orientedDe
-	};
-	RightmostEdgeFinder.prototype.checkForRightmostCoordinate = function checkForRightmostCoordinate (de) {
-	    var this$1 = this;
+	      /**
+	       * @member Hashes
+	       * @class Base64
+	       * @constructor
+	       */
+	      Base64: function Base64() {
+	        // private properties
+	        var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
+	            pad = '=',
+	            // URL encoding support @todo
+	        utf8 = true; // by default enable UTF-8 support encoding
+	        // public method for encoding
+
+	        this.encode = function (input) {
+	          var i,
+	              j,
+	              triplet,
+	              output = '',
+	              len = input.length;
+	          pad = pad || '=';
+	          input = utf8 ? utf8Encode(input) : input;
+
+	          for (i = 0; i < len; i += 3) {
+	            triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
+
+	            for (j = 0; j < 4; j += 1) {
+	              if (i * 8 + j * 6 > len * 8) {
+	                output += pad;
+	              } else {
+	                output += tab.charAt(triplet >>> 6 * (3 - j) & 0x3F);
+	              }
+	            }
+	          }
 
-	  var coord = de.getEdge().getCoordinates();
-	  for (var i = 0; i < coord.length - 1; i++) {
-	    if (this$1._minCoord === null || coord[i].x > this$1._minCoord.x) {
-	      this$1._minDe = de;
-	      this$1._minIndex = i;
-	      this$1._minCoord = coord[i];
-	    }
-	  }
-	};
-	RightmostEdgeFinder.prototype.findRightmostEdgeAtNode = function findRightmostEdgeAtNode () {
-	  var node = this._minDe.getNode();
-	  var star = node.getEdges();
-	  this._minDe = star.getRightmostEdge();
-	  if (!this._minDe.isForward()) {
-	    this._minDe = this._minDe.getSym();
-	    this._minIndex = this._minDe.getEdge().getCoordinates().length - 1;
-	  }
-	};
-	RightmostEdgeFinder.prototype.findEdge = function findEdge (dirEdgeList) {
-	    var this$1 = this;
+	          return output;
+	        }; // public method for decoding
+
+
+	        this.decode = function (input) {
+	          // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
+	          var i,
+	              o1,
+	              o2,
+	              o3,
+	              h1,
+	              h2,
+	              h3,
+	              h4,
+	              bits,
+	              ac,
+	              dec = '',
+	              arr = [];
+
+	          if (!input) {
+	            return input;
+	          }
 
-	  for (var i = dirEdgeList.iterator(); i.hasNext();) {
-	    var de = i.next();
-	    if (!de.isForward()) { continue }
-	    this$1.checkForRightmostCoordinate(de);
-	  }
-	  Assert.isTrue(this._minIndex !== 0 || this._minCoord.equals(this._minDe.getCoordinate()), 'inconsistency in rightmost processing');
-	  if (this._minIndex === 0) {
-	    this.findRightmostEdgeAtNode();
-	  } else {
-	    this.findRightmostEdgeAtVertex();
-	  }
-	  this._orientedDe = this._minDe;
-	  var rightmostSide = this.getRightmostSide(this._minDe, this._minIndex);
-	  if (rightmostSide === Position.LEFT) {
-	    this._orientedDe = this._minDe.getSym();
-	  }
-	};
-	RightmostEdgeFinder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	RightmostEdgeFinder.prototype.getClass = function getClass () {
-	  return RightmostEdgeFinder
-	};
+	          i = ac = 0;
+	          input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
+	          //input += '';
+
+	          do {
+	            // unpack four hexets into three octets using index points in b64
+	            h1 = tab.indexOf(input.charAt(i += 1));
+	            h2 = tab.indexOf(input.charAt(i += 1));
+	            h3 = tab.indexOf(input.charAt(i += 1));
+	            h4 = tab.indexOf(input.charAt(i += 1));
+	            bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
+	            o1 = bits >> 16 & 0xff;
+	            o2 = bits >> 8 & 0xff;
+	            o3 = bits & 0xff;
+	            ac += 1;
+
+	            if (h3 === 64) {
+	              arr[ac] = String.fromCharCode(o1);
+	            } else if (h4 === 64) {
+	              arr[ac] = String.fromCharCode(o1, o2);
+	            } else {
+	              arr[ac] = String.fromCharCode(o1, o2, o3);
+	            }
+	          } while (i < input.length);
 
-	var TopologyException = (function (RuntimeException$$1) {
-	  function TopologyException (msg, pt) {
-	    RuntimeException$$1.call(this, TopologyException.msgWithCoord(msg, pt));
-	    this.pt = pt ? new Coordinate(pt) : null;
-	    this.name = 'TopologyException';
-	  }
+	          dec = arr.join('');
+	          dec = utf8 ? utf8Decode(dec) : dec;
+	          return dec;
+	        }; // set custom pad string
 
-	  if ( RuntimeException$$1 ) { TopologyException.__proto__ = RuntimeException$$1; }
-	  TopologyException.prototype = Object.create( RuntimeException$$1 && RuntimeException$$1.prototype );
-	  TopologyException.prototype.constructor = TopologyException;
-	  TopologyException.prototype.getCoordinate = function getCoordinate () {
-	    return this.pt
-	  };
-	  TopologyException.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  TopologyException.prototype.getClass = function getClass () {
-	    return TopologyException
-	  };
-	  TopologyException.msgWithCoord = function msgWithCoord (msg, pt) {
-	    if (!pt) { return msg + ' [ ' + pt + ' ]' }
-	    return msg
-	  };
 
-	  return TopologyException;
-	}(RuntimeException));
+	        this.setPad = function (str) {
+	          pad = str || pad;
+	          return this;
+	        }; // set custom tab string characters
 
-	var LinkedList = function LinkedList () {
-	  this.array_ = [];
-	};
-	LinkedList.prototype.addLast = function addLast (e) {
-	  this.array_.push(e);
-	};
-	LinkedList.prototype.removeFirst = function removeFirst () {
-	  return this.array_.shift()
-	};
-	LinkedList.prototype.isEmpty = function isEmpty () {
-	  return this.array_.length === 0
-	};
 
-	var BufferSubgraph = function BufferSubgraph () {
-	  this._finder = null;
-	  this._dirEdgeList = new ArrayList();
-	  this._nodes = new ArrayList();
-	  this._rightMostCoord = null;
-	  this._env = null;
-	  this._finder = new RightmostEdgeFinder();
-	};
-	BufferSubgraph.prototype.clearVisitedEdges = function clearVisitedEdges () {
-	  for (var it = this._dirEdgeList.iterator(); it.hasNext();) {
-	    var de = it.next();
-	    de.setVisited(false);
-	  }
-	};
-	BufferSubgraph.prototype.getRightmostCoordinate = function getRightmostCoordinate () {
-	  return this._rightMostCoord
-	};
-	BufferSubgraph.prototype.computeNodeDepth = function computeNodeDepth (n) {
-	    var this$1 = this;
+	        this.setTab = function (str) {
+	          tab = str || tab;
+	          return this;
+	        };
 
-	  var startEdge = null;
-	  for (var i = n.getEdges().iterator(); i.hasNext();) {
-	    var de = i.next();
-	    if (de.isVisited() || de.getSym().isVisited()) {
-	      startEdge = de;
-	      break
-	    }
-	  }
-	  if (startEdge === null) { throw new TopologyException('unable to find edge to compute depths at ' + n.getCoordinate()) }
-	  n.getEdges().computeDepths(startEdge);
-	  for (var i$1 = n.getEdges().iterator(); i$1.hasNext();) {
-	    var de$1 = i$1.next();
-	    de$1.setVisited(true);
-	    this$1.copySymDepths(de$1);
-	  }
-	};
-	BufferSubgraph.prototype.computeDepth = function computeDepth (outsideDepth) {
-	  this.clearVisitedEdges();
-	  var de = this._finder.getEdge();
-	  // const n = de.getNode()
-	  // const label = de.getLabel()
-	  de.setEdgeDepths(Position.RIGHT, outsideDepth);
-	  this.copySymDepths(de);
-	  this.computeDepths(de);
-	};
-	BufferSubgraph.prototype.create = function create (node) {
-	  this.addReachable(node);
-	  this._finder.findEdge(this._dirEdgeList);
-	  this._rightMostCoord = this._finder.getCoordinate();
-	};
-	BufferSubgraph.prototype.findResultEdges = function findResultEdges () {
-	  for (var it = this._dirEdgeList.iterator(); it.hasNext();) {
-	    var de = it.next();
-	    if (de.getDepth(Position.RIGHT) >= 1 && de.getDepth(Position.LEFT) <= 0 && !de.isInteriorAreaEdge()) {
-	      de.setInResult(true);
-	    }
-	  }
-	};
-	BufferSubgraph.prototype.computeDepths = function computeDepths (startEdge) {
-	    var this$1 = this;
-
-	  var nodesVisited = new HashSet();
-	  var nodeQueue = new LinkedList();
-	  var startNode = startEdge.getNode();
-	  nodeQueue.addLast(startNode);
-	  nodesVisited.add(startNode);
-	  startEdge.setVisited(true);
-	  while (!nodeQueue.isEmpty()) {
-	    var n = nodeQueue.removeFirst();
-	    nodesVisited.add(n);
-	    this$1.computeNodeDepth(n);
-	    for (var i = n.getEdges().iterator(); i.hasNext();) {
-	      var de = i.next();
-	      var sym = de.getSym();
-	      if (sym.isVisited()) { continue }
-	      var adjNode = sym.getNode();
-	      if (!nodesVisited.contains(adjNode)) {
-	        nodeQueue.addLast(adjNode);
-	        nodesVisited.add(adjNode);
-	      }
-	    }
-	  }
-	};
-	BufferSubgraph.prototype.compareTo = function compareTo (o) {
-	  var graph = o;
-	  if (this._rightMostCoord.x < graph._rightMostCoord.x) {
-	    return -1
-	  }
-	  if (this._rightMostCoord.x > graph._rightMostCoord.x) {
-	    return 1
-	  }
-	  return 0
-	};
-	BufferSubgraph.prototype.getEnvelope = function getEnvelope () {
-	  if (this._env === null) {
-	    var edgeEnv = new Envelope();
-	    for (var it = this._dirEdgeList.iterator(); it.hasNext();) {
-	      var dirEdge = it.next();
-	      var pts = dirEdge.getEdge().getCoordinates();
-	      for (var i = 0; i < pts.length - 1; i++) {
-	        edgeEnv.expandToInclude(pts[i]);
-	      }
-	    }
-	    this._env = edgeEnv;
-	  }
-	  return this._env
-	};
-	BufferSubgraph.prototype.addReachable = function addReachable (startNode) {
-	    var this$1 = this;
+	        this.setUTF8 = function (bool) {
+	          if (typeof bool === 'boolean') {
+	            utf8 = bool;
+	          }
 
-	  var nodeStack = new Stack();
-	  nodeStack.add(startNode);
-	  while (!nodeStack.empty()) {
-	    var node = nodeStack.pop();
-	    this$1.add(node, nodeStack);
-	  }
-	};
-	BufferSubgraph.prototype.copySymDepths = function copySymDepths (de) {
-	  var sym = de.getSym();
-	  sym.setDepth(Position.LEFT, de.getDepth(Position.RIGHT));
-	  sym.setDepth(Position.RIGHT, de.getDepth(Position.LEFT));
-	};
-	BufferSubgraph.prototype.add = function add (node, nodeStack) {
-	    var this$1 = this;
-
-	  node.setVisited(true);
-	  this._nodes.add(node);
-	  for (var i = node.getEdges().iterator(); i.hasNext();) {
-	    var de = i.next();
-	    this$1._dirEdgeList.add(de);
-	    var sym = de.getSym();
-	    var symNode = sym.getNode();
-	    if (!symNode.isVisited()) { nodeStack.push(symNode); }
-	  }
-	};
-	BufferSubgraph.prototype.getNodes = function getNodes () {
-	  return this._nodes
-	};
-	BufferSubgraph.prototype.getDirectedEdges = function getDirectedEdges () {
-	  return this._dirEdgeList
-	};
-	BufferSubgraph.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	BufferSubgraph.prototype.getClass = function getClass () {
-	  return BufferSubgraph
-	};
+	          return this;
+	        };
+	      },
 
-	var TopologyLocation = function TopologyLocation () {
-	  var this$1 = this;
+	      /**
+	       * CRC-32 calculation
+	       * @member Hashes
+	       * @method CRC32
+	       * @static
+	       * @param {String} str Input String
+	       * @return {String}
+	       */
+	      CRC32: function CRC32(str) {
+	        var crc = 0,
+	            x = 0,
+	            y = 0,
+	            table,
+	            i,
+	            iTop;
+	        str = utf8Encode(str);
+	        table = ['00000000 77073096 EE0E612C 990951BA 076DC419 706AF48F E963A535 9E6495A3 0EDB8832 ', '79DCB8A4 E0D5E91E 97D2D988 09B64C2B 7EB17CBD E7B82D07 90BF1D91 1DB71064 6AB020F2 F3B97148 ', '84BE41DE 1ADAD47D 6DDDE4EB F4D4B551 83D385C7 136C9856 646BA8C0 FD62F97A 8A65C9EC 14015C4F ', '63066CD9 FA0F3D63 8D080DF5 3B6E20C8 4C69105E D56041E4 A2677172 3C03E4D1 4B04D447 D20D85FD ', 'A50AB56B 35B5A8FA 42B2986C DBBBC9D6 ACBCF940 32D86CE3 45DF5C75 DCD60DCF ABD13D59 26D930AC ', '51DE003A C8D75180 BFD06116 21B4F4B5 56B3C423 CFBA9599 B8BDA50F 2802B89E 5F058808 C60CD9B2 ', 'B10BE924 2F6F7C87 58684C11 C1611DAB B6662D3D 76DC4190 01DB7106 98D220BC EFD5102A 71B18589 ', '06B6B51F 9FBFE4A5 E8B8D433 7807C9A2 0F00F934 9609A88E E10E9818 7F6A0DBB 086D3D2D 91646C97 ', 'E6635C01 6B6B51F4 1C6C6162 856530D8 F262004E 6C0695ED 1B01A57B 8208F4C1 F50FC457 65B0D9C6 ', '12B7E950 8BBEB8EA FCB9887C 62DD1DDF 15DA2D49 8CD37CF3 FBD44C65 4DB26158 3AB551CE A3BC0074 ', 'D4BB30E2 4ADFA541 3DD895D7 A4D1C46D D3D6F4FB 4369E96A 346ED9FC AD678846 DA60B8D0 44042D73 ', '33031DE5 AA0A4C5F DD0D7CC9 5005713C 270241AA BE0B1010 C90C2086 5768B525 206F85B3 B966D409 ', 'CE61E49F 5EDEF90E 29D9C998 B0D09822 C7D7A8B4 59B33D17 2EB40D81 B7BD5C3B C0BA6CAD EDB88320 ', '9ABFB3B6 03B6E20C 74B1D29A EAD54739 9DD277AF 04DB2615 73DC1683 E3630B12 94643B84 0D6D6A3E ', '7A6A5AA8 E40ECF0B 9309FF9D 0A00AE27 7D079EB1 F00F9344 8708A3D2 1E01F268 6906C2FE F762575D ', '806567CB 196C3671 6E6B06E7 FED41B76 89D32BE0 10DA7A5A 67DD4ACC F9B9DF6F 8EBEEFF9 17B7BE43 ', '60B08ED5 D6D6A3E8 A1D1937E 38D8C2C4 4FDFF252 D1BB67F1 A6BC5767 3FB506DD 48B2364B D80D2BDA ', 'AF0A1B4C 36034AF6 41047A60 DF60EFC3 A867DF55 316E8EEF 4669BE79 CB61B38C BC66831A 256FD2A0 ', '5268E236 CC0C7795 BB0B4703 220216B9 5505262F C5BA3BBE B2BD0B28 2BB45A92 5CB36A04 C2D7FFA7 ', 'B5D0CF31 2CD99E8B 5BDEAE1D 9B64C2B0 EC63F226 756AA39C 026D930A 9C0906A9 EB0E363F 72076785 ', '05005713 95BF4A82 E2B87A14 7BB12BAE 0CB61B38 92D28E9B E5D5BE0D 7CDCEFB7 0BDBDF21 86D3D2D4 ', 'F1D4E242 68DDB3F8 1FDA836E 81BE16CD F6B9265B 6FB077E1 18B74777 88085AE6 FF0F6A70 66063BCA ', '11010B5C 8F659EFF F862AE69 616BFFD3 166CCF45 A00AE278 D70DD2EE 4E048354 3903B3C2 A7672661 ', 'D06016F7 4969474D 3E6E77DB AED16A4A D9D65ADC 40DF0B66 37D83BF0 A9BCAE53 DEBB9EC5 47B2CF7F ', '30B5FFE9 BDBDF21C CABAC28A 53B39330 24B4A3A6 BAD03605 CDD70693 54DE5729 23D967BF B3667A2E ', 'C4614AB8 5D681B02 2A6F2B94 B40BBE37 C30C8EA1 5A05DF1B 2D02EF8D'].join('');
+	        crc = crc ^ -1;
+
+	        for (i = 0, iTop = str.length; i < iTop; i += 1) {
+	          y = (crc ^ str.charCodeAt(i)) & 0xFF;
+	          x = '0x' + table.substr(y * 9, 8);
+	          crc = crc >>> 8 ^ x;
+	        } // always return a positive number (that's what >>> 0 does)
+
+
+	        return (crc ^ -1) >>> 0;
+	      },
 
-	  this.location = null;
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Array) {
-	      var location = arguments[0];
-	      this.init(location.length);
-	    } else if (Number.isInteger(arguments[0])) {
-	      var on = arguments[0];
-	      this.init(1);
-	      this.location[Position.ON] = on;
-	    } else if (arguments[0] instanceof TopologyLocation) {
-	      var gl = arguments[0];
-	      this.init(gl.location.length);
-	      if (gl !== null) {
-	        for (var i = 0; i < this.location.length; i++) {
-	          this$1.location[i] = gl.location[i];
-	        }
-	      }
-	    }
-	  } else if (arguments.length === 3) {
-	    var on$1 = arguments[0];
-	    var left = arguments[1];
-	    var right = arguments[2];
-	    this.init(3);
-	    this.location[Position.ON] = on$1;
-	    this.location[Position.LEFT] = left;
-	    this.location[Position.RIGHT] = right;
-	  }
-	};
-	TopologyLocation.prototype.setAllLocations = function setAllLocations (locValue) {
-	    var this$1 = this;
+	      /**
+	       * @member Hashes
+	       * @class MD5
+	       * @constructor
+	       * @param {Object} [config]
+	       *
+	       * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
+	       * Digest Algorithm, as defined in RFC 1321.
+	       * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
+	       * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+	       * See <http://pajhome.org.uk/crypt/md5> for more infHashes.
+	       */
+	      MD5: function MD5(options) {
+	        /**
+	         * Private config properties. You may need to tweak these to be compatible with
+	         * the server-side, but the defaults work in most cases.
+	         * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
+	         */
+	        var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
+	            // hexadecimal output case format. false - lowercase; true - uppercase
+	        b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
+	            // base-64 pad character. Defaults to '=' for strict RFC compliance
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true; // enable/disable utf8 encoding
+	        // privileged (public) methods
+
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s), hexcase);
+	        };
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    this$1.location[i] = locValue;
-	  }
-	};
-	TopologyLocation.prototype.isNull = function isNull () {
-	    var this$1 = this;
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    if (this$1.location[i] !== Location.NONE) { return false }
-	  }
-	  return true
-	};
-	TopologyLocation.prototype.setAllLocationsIfNull = function setAllLocationsIfNull (locValue) {
-	    var this$1 = this;
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    if (this$1.location[i] === Location.NONE) { this$1.location[i] = locValue; }
-	  }
-	};
-	TopologyLocation.prototype.isLine = function isLine () {
-	  return this.location.length === 1
-	};
-	TopologyLocation.prototype.merge = function merge (gl) {
-	    var this$1 = this;
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	  if (gl.location.length > this.location.length) {
-	    var newLoc = new Array(3).fill(null);
-	    newLoc[Position.ON] = this.location[Position.ON];
-	    newLoc[Position.LEFT] = Location.NONE;
-	    newLoc[Position.RIGHT] = Location.NONE;
-	    this.location = newLoc;
-	  }
-	  for (var i = 0; i < this.location.length; i++) {
-	    if (this$1.location[i] === Location.NONE && i < gl.location.length) { this$1.location[i] = gl.location[i]; }
-	  }
-	};
-	TopologyLocation.prototype.getLocations = function getLocations () {
-	  return this.location
-	};
-	TopologyLocation.prototype.flip = function flip () {
-	  if (this.location.length <= 1) { return null }
-	  var temp = this.location[Position.LEFT];
-	  this.location[Position.LEFT] = this.location[Position.RIGHT];
-	  this.location[Position.RIGHT] = temp;
-	};
-	TopologyLocation.prototype.toString = function toString () {
-	  var buf = new StringBuffer();
-	  if (this.location.length > 1) { buf.append(Location.toLocationSymbol(this.location[Position.LEFT])); }
-	  buf.append(Location.toLocationSymbol(this.location[Position.ON]));
-	  if (this.location.length > 1) { buf.append(Location.toLocationSymbol(this.location[Position.RIGHT])); }
-	  return buf.toString()
-	};
-	TopologyLocation.prototype.setLocations = function setLocations (on, left, right) {
-	  this.location[Position.ON] = on;
-	  this.location[Position.LEFT] = left;
-	  this.location[Position.RIGHT] = right;
-	};
-	TopologyLocation.prototype.get = function get (posIndex) {
-	  if (posIndex < this.location.length) { return this.location[posIndex] }
-	  return Location.NONE
-	};
-	TopologyLocation.prototype.isArea = function isArea () {
-	  return this.location.length > 1
-	};
-	TopologyLocation.prototype.isAnyNull = function isAnyNull () {
-	    var this$1 = this;
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d), hexcase);
+	        };
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    if (this$1.location[i] === Location.NONE) { return true }
-	  }
-	  return false
-	};
-	TopologyLocation.prototype.setLocation = function setLocation () {
-	  if (arguments.length === 1) {
-	    var locValue = arguments[0];
-	    this.setLocation(Position.ON, locValue);
-	  } else if (arguments.length === 2) {
-	    var locIndex = arguments[0];
-	    var locValue$1 = arguments[1];
-	    this.location[locIndex] = locValue$1;
-	  }
-	};
-	TopologyLocation.prototype.init = function init (size) {
-	  this.location = new Array(size).fill(null);
-	  this.setAllLocations(Location.NONE);
-	};
-	TopologyLocation.prototype.isEqualOnSide = function isEqualOnSide (le, locIndex) {
-	  return this.location[locIndex] === le.location[locIndex]
-	};
-	TopologyLocation.prototype.allPositionsEqual = function allPositionsEqual (loc) {
-	    var this$1 = this;
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    if (this$1.location[i] !== loc) { return false }
-	  }
-	  return true
-	};
-	TopologyLocation.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	TopologyLocation.prototype.getClass = function getClass () {
-	  return TopologyLocation
-	};
+	        this.any_hmac = function (k, d, e) {
+	          return rstr2any(rstr_hmac(k, d), e);
+	        };
+	        /**
+	         * Perform a simple self-test to see if the VM is working
+	         * @return {String} Hexadecimal hash sample
+	         */
 
-	var Label = function Label () {
-	  this.elt = new Array(2).fill(null);
-	  if (arguments.length === 1) {
-	    if (Number.isInteger(arguments[0])) {
-	      var onLoc = arguments[0];
-	      this.elt[0] = new TopologyLocation(onLoc);
-	      this.elt[1] = new TopologyLocation(onLoc);
-	    } else if (arguments[0] instanceof Label) {
-	      var lbl = arguments[0];
-	      this.elt[0] = new TopologyLocation(lbl.elt[0]);
-	      this.elt[1] = new TopologyLocation(lbl.elt[1]);
-	    }
-	  } else if (arguments.length === 2) {
-	    var geomIndex = arguments[0];
-	    var onLoc$1 = arguments[1];
-	    this.elt[0] = new TopologyLocation(Location.NONE);
-	    this.elt[1] = new TopologyLocation(Location.NONE);
-	    this.elt[geomIndex].setLocation(onLoc$1);
-	  } else if (arguments.length === 3) {
-	    var onLoc$2 = arguments[0];
-	    var leftLoc = arguments[1];
-	    var rightLoc = arguments[2];
-	    this.elt[0] = new TopologyLocation(onLoc$2, leftLoc, rightLoc);
-	    this.elt[1] = new TopologyLocation(onLoc$2, leftLoc, rightLoc);
-	  } else if (arguments.length === 4) {
-	    var geomIndex$1 = arguments[0];
-	    var onLoc$3 = arguments[1];
-	    var leftLoc$1 = arguments[2];
-	    var rightLoc$1 = arguments[3];
-	    this.elt[0] = new TopologyLocation(Location.NONE, Location.NONE, Location.NONE);
-	    this.elt[1] = new TopologyLocation(Location.NONE, Location.NONE, Location.NONE);
-	    this.elt[geomIndex$1].setLocations(onLoc$3, leftLoc$1, rightLoc$1);
-	  }
-	};
-	Label.prototype.getGeometryCount = function getGeometryCount () {
-	  var count = 0;
-	  if (!this.elt[0].isNull()) { count++; }
-	  if (!this.elt[1].isNull()) { count++; }
-	  return count
-	};
-	Label.prototype.setAllLocations = function setAllLocations (geomIndex, location) {
-	  this.elt[geomIndex].setAllLocations(location);
-	};
-	Label.prototype.isNull = function isNull (geomIndex) {
-	  return this.elt[geomIndex].isNull()
-	};
-	Label.prototype.setAllLocationsIfNull = function setAllLocationsIfNull () {
-	  if (arguments.length === 1) {
-	    var location = arguments[0];
-	    this.setAllLocationsIfNull(0, location);
-	    this.setAllLocationsIfNull(1, location);
-	  } else if (arguments.length === 2) {
-	    var geomIndex = arguments[0];
-	    var location$1 = arguments[1];
-	    this.elt[geomIndex].setAllLocationsIfNull(location$1);
-	  }
-	};
-	Label.prototype.isLine = function isLine (geomIndex) {
-	  return this.elt[geomIndex].isLine()
-	};
-	Label.prototype.merge = function merge (lbl) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < 2; i++) {
-	    if (this$1.elt[i] === null && lbl.elt[i] !== null) {
-	      this$1.elt[i] = new TopologyLocation(lbl.elt[i]);
-	    } else {
-	      this$1.elt[i].merge(lbl.elt[i]);
-	    }
-	  }
-	};
-	Label.prototype.flip = function flip () {
-	  this.elt[0].flip();
-	  this.elt[1].flip();
-	};
-	Label.prototype.getLocation = function getLocation () {
-	  if (arguments.length === 1) {
-	    var geomIndex = arguments[0];
-	    return this.elt[geomIndex].get(Position.ON)
-	  } else if (arguments.length === 2) {
-	    var geomIndex$1 = arguments[0];
-	    var posIndex = arguments[1];
-	    return this.elt[geomIndex$1].get(posIndex)
-	  }
-	};
-	Label.prototype.toString = function toString () {
-	  var buf = new StringBuffer();
-	  if (this.elt[0] !== null) {
-	    buf.append('A:');
-	    buf.append(this.elt[0].toString());
-	  }
-	  if (this.elt[1] !== null) {
-	    buf.append(' B:');
-	    buf.append(this.elt[1].toString());
-	  }
-	  return buf.toString()
-	};
-	Label.prototype.isArea = function isArea () {
-	  if (arguments.length === 0) {
-	    return this.elt[0].isArea() || this.elt[1].isArea()
-	  } else if (arguments.length === 1) {
-	    var geomIndex = arguments[0];
-	    return this.elt[geomIndex].isArea()
-	  }
-	};
-	Label.prototype.isAnyNull = function isAnyNull (geomIndex) {
-	  return this.elt[geomIndex].isAnyNull()
-	};
-	Label.prototype.setLocation = function setLocation () {
-	  if (arguments.length === 2) {
-	    var geomIndex = arguments[0];
-	    var location = arguments[1];
-	    this.elt[geomIndex].setLocation(Position.ON, location);
-	  } else if (arguments.length === 3) {
-	    var geomIndex$1 = arguments[0];
-	    var posIndex = arguments[1];
-	    var location$1 = arguments[2];
-	    this.elt[geomIndex$1].setLocation(posIndex, location$1);
-	  }
-	};
-	Label.prototype.isEqualOnSide = function isEqualOnSide (lbl, side) {
-	  return this.elt[0].isEqualOnSide(lbl.elt[0], side) && this.elt[1].isEqualOnSide(lbl.elt[1], side)
-	};
-	Label.prototype.allPositionsEqual = function allPositionsEqual (geomIndex, loc) {
-	  return this.elt[geomIndex].allPositionsEqual(loc)
-	};
-	Label.prototype.toLine = function toLine (geomIndex) {
-	  if (this.elt[geomIndex].isArea()) { this.elt[geomIndex] = new TopologyLocation(this.elt[geomIndex].location[0]); }
-	};
-	Label.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Label.prototype.getClass = function getClass () {
-	  return Label
-	};
-	Label.toLineLabel = function toLineLabel (label) {
-	  var lineLabel = new Label(Location.NONE);
-	  for (var i = 0; i < 2; i++) {
-	    lineLabel.setLocation(i, label.getLocation(i));
-	  }
-	  return lineLabel
-	};
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * Enable/disable uppercase hexadecimal returned string
+	         * @param {Boolean}
+	         * @return {Object} this
+	         */
 
-	var EdgeRing = function EdgeRing () {
-	  this._startDe = null;
-	  this._maxNodeDegree = -1;
-	  this._edges = new ArrayList();
-	  this._pts = new ArrayList();
-	  this._label = new Label(Location.NONE);
-	  this._ring = null;
-	  this._isHole = null;
-	  this._shell = null;
-	  this._holes = new ArrayList();
-	  this._geometryFactory = null;
-	  var start = arguments[0];
-	  var geometryFactory = arguments[1];
-	  this._geometryFactory = geometryFactory;
-	  this.computePoints(start);
-	  this.computeRing();
-	};
-	EdgeRing.prototype.computeRing = function computeRing () {
-	    var this$1 = this;
 
-	  if (this._ring !== null) { return null }
-	  var coord = new Array(this._pts.size()).fill(null);
-	  for (var i = 0; i < this._pts.size(); i++) {
-	    coord[i] = this$1._pts.get(i);
-	  }
-	  this._ring = this._geometryFactory.createLinearRing(coord);
-	  this._isHole = CGAlgorithms.isCCW(this._ring.getCoordinates());
-	};
-	EdgeRing.prototype.isIsolated = function isIsolated () {
-	  return this._label.getGeometryCount() === 1
-	};
-	EdgeRing.prototype.computePoints = function computePoints (start) {
-	    var this$1 = this;
+	        this.setUpperCase = function (a) {
+	          if (typeof a === 'boolean') {
+	            hexcase = a;
+	          }
 
-	  this._startDe = start;
-	  var de = start;
-	  var isFirstEdge = true;
-	  do {
-	    if (de === null) { throw new TopologyException('Found null DirectedEdge') }
-	    if (de.getEdgeRing() === this$1) { throw new TopologyException('Directed Edge visited twice during ring-building at ' + de.getCoordinate()) }
-	    this$1._edges.add(de);
-	    var label = de.getLabel();
-	    Assert.isTrue(label.isArea());
-	    this$1.mergeLabel(label);
-	    this$1.addPoints(de.getEdge(), de.isForward(), isFirstEdge);
-	    isFirstEdge = false;
-	    this$1.setEdgeRing(de, this$1);
-	    de = this$1.getNext(de);
-	  } while (de !== this._startDe)
-	};
-	EdgeRing.prototype.getLinearRing = function getLinearRing () {
-	  return this._ring
-	};
-	EdgeRing.prototype.getCoordinate = function getCoordinate (i) {
-	  return this._pts.get(i)
-	};
-	EdgeRing.prototype.computeMaxNodeDegree = function computeMaxNodeDegree () {
-	    var this$1 = this;
+	          return this;
+	        };
+	        /**
+	         * Defines a base64 pad string
+	         * @param {String} Pad
+	         * @return {Object} this
+	         */
 
-	  this._maxNodeDegree = 0;
-	  var de = this._startDe;
-	  do {
-	    var node = de.getNode();
-	    var degree = node.getEdges().getOutgoingDegree(this$1);
-	    if (degree > this$1._maxNodeDegree) { this$1._maxNodeDegree = degree; }
-	    de = this$1.getNext(de);
-	  } while (de !== this._startDe)
-	  this._maxNodeDegree *= 2;
-	};
-	EdgeRing.prototype.addPoints = function addPoints (edge, isForward, isFirstEdge) {
-	    var this$1 = this;
 
-	  var edgePts = edge.getCoordinates();
-	  if (isForward) {
-	    var startIndex = 1;
-	    if (isFirstEdge) { startIndex = 0; }
-	    for (var i = startIndex; i < edgePts.length; i++) {
-	      this$1._pts.add(edgePts[i]);
-	    }
-	  } else {
-	    var startIndex$1 = edgePts.length - 2;
-	    if (isFirstEdge) { startIndex$1 = edgePts.length - 1; }
-	    for (var i$1 = startIndex$1; i$1 >= 0; i$1--) {
-	      this$1._pts.add(edgePts[i$1]);
-	    }
-	  }
-	};
-	EdgeRing.prototype.isHole = function isHole () {
-	  return this._isHole
-	};
-	EdgeRing.prototype.setInResult = function setInResult () {
-	  var de = this._startDe;
-	  do {
-	    de.getEdge().setInResult(true);
-	    de = de.getNext();
-	  } while (de !== this._startDe)
-	};
-	EdgeRing.prototype.containsPoint = function containsPoint (p) {
-	  var shell = this.getLinearRing();
-	  var env = shell.getEnvelopeInternal();
-	  if (!env.contains(p)) { return false }
-	  if (!CGAlgorithms.isPointInRing(p, shell.getCoordinates())) { return false }
-	  for (var i = this._holes.iterator(); i.hasNext();) {
-	    var hole = i.next();
-	    if (hole.containsPoint(p)) { return false }
-	  }
-	  return true
-	};
-	EdgeRing.prototype.addHole = function addHole (ring) {
-	  this._holes.add(ring);
-	};
-	EdgeRing.prototype.isShell = function isShell () {
-	  return this._shell === null
-	};
-	EdgeRing.prototype.getLabel = function getLabel () {
-	  return this._label
-	};
-	EdgeRing.prototype.getEdges = function getEdges () {
-	  return this._edges
-	};
-	EdgeRing.prototype.getMaxNodeDegree = function getMaxNodeDegree () {
-	  if (this._maxNodeDegree < 0) { this.computeMaxNodeDegree(); }
-	  return this._maxNodeDegree
-	};
-	EdgeRing.prototype.getShell = function getShell () {
-	  return this._shell
-	};
-	EdgeRing.prototype.mergeLabel = function mergeLabel () {
-	  if (arguments.length === 1) {
-	    var deLabel = arguments[0];
-	    this.mergeLabel(deLabel, 0);
-	    this.mergeLabel(deLabel, 1);
-	  } else if (arguments.length === 2) {
-	    var deLabel$1 = arguments[0];
-	    var geomIndex = arguments[1];
-	    var loc = deLabel$1.getLocation(geomIndex, Position.RIGHT);
-	    if (loc === Location.NONE) { return null }
-	    if (this._label.getLocation(geomIndex) === Location.NONE) {
-	      this._label.setLocation(geomIndex, loc);
-	      return null
-	    }
-	  }
-	};
-	EdgeRing.prototype.setShell = function setShell (shell) {
-	  this._shell = shell;
-	  if (shell !== null) { shell.addHole(this); }
-	};
-	EdgeRing.prototype.toPolygon = function toPolygon (geometryFactory) {
-	    var this$1 = this;
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * Defines a base64 pad string
+	         * @param {Boolean}
+	         * @return {Object} [this]
+	         */
 
-	  var holeLR = new Array(this._holes.size()).fill(null);
-	  for (var i = 0; i < this._holes.size(); i++) {
-	    holeLR[i] = this$1._holes.get(i).getLinearRing();
-	  }
-	  var poly = geometryFactory.createPolygon(this.getLinearRing(), holeLR);
-	  return poly
-	};
-	EdgeRing.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeRing.prototype.getClass = function getClass () {
-	  return EdgeRing
-	};
 
-	var MinimalEdgeRing = (function (EdgeRing$$1) {
-	  function MinimalEdgeRing () {
-	    var start = arguments[0];
-	    var geometryFactory = arguments[1];
-	    EdgeRing$$1.call(this, start, geometryFactory);
-	  }
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	  if ( EdgeRing$$1 ) { MinimalEdgeRing.__proto__ = EdgeRing$$1; }
-	  MinimalEdgeRing.prototype = Object.create( EdgeRing$$1 && EdgeRing$$1.prototype );
-	  MinimalEdgeRing.prototype.constructor = MinimalEdgeRing;
-	  MinimalEdgeRing.prototype.setEdgeRing = function setEdgeRing (de, er) {
-	    de.setMinEdgeRing(er);
-	  };
-	  MinimalEdgeRing.prototype.getNext = function getNext (de) {
-	    return de.getNextMin()
-	  };
-	  MinimalEdgeRing.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  MinimalEdgeRing.prototype.getClass = function getClass () {
-	    return MinimalEdgeRing
-	  };
+	          return this;
+	        }; // private methods
 
-	  return MinimalEdgeRing;
-	}(EdgeRing));
+	        /**
+	         * Calculate the MD5 of a raw string
+	         */
 
-	var MaximalEdgeRing = (function (EdgeRing$$1) {
-	  function MaximalEdgeRing () {
-	    var start = arguments[0];
-	    var geometryFactory = arguments[1];
-	    EdgeRing$$1.call(this, start, geometryFactory);
-	  }
 
-	  if ( EdgeRing$$1 ) { MaximalEdgeRing.__proto__ = EdgeRing$$1; }
-	  MaximalEdgeRing.prototype = Object.create( EdgeRing$$1 && EdgeRing$$1.prototype );
-	  MaximalEdgeRing.prototype.constructor = MaximalEdgeRing;
-	  MaximalEdgeRing.prototype.buildMinimalRings = function buildMinimalRings () {
-	    var this$1 = this;
+	        function rstr(s) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binl2rstr(binl(rstr2binl(s), s.length * 8));
+	        }
+	        /**
+	         * Calculate the HMAC-MD5, of a key and some data (raw strings)
+	         */
 
-	    var minEdgeRings = new ArrayList();
-	    var de = this._startDe;
-	    do {
-	      if (de.getMinEdgeRing() === null) {
-	        var minEr = new MinimalEdgeRing(de, this$1._geometryFactory);
-	        minEdgeRings.add(minEr);
-	      }
-	      de = de.getNext();
-	    } while (de !== this._startDe)
-	    return minEdgeRings
-	  };
-	  MaximalEdgeRing.prototype.setEdgeRing = function setEdgeRing (de, er) {
-	    de.setEdgeRing(er);
-	  };
-	  MaximalEdgeRing.prototype.linkDirectedEdgesForMinimalEdgeRings = function linkDirectedEdgesForMinimalEdgeRings () {
-	    var this$1 = this;
 
-	    var de = this._startDe;
-	    do {
-	      var node = de.getNode();
-	      node.getEdges().linkMinimalDirectedEdges(this$1);
-	      de = de.getNext();
-	    } while (de !== this._startDe)
-	  };
-	  MaximalEdgeRing.prototype.getNext = function getNext (de) {
-	    return de.getNext()
-	  };
-	  MaximalEdgeRing.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  MaximalEdgeRing.prototype.getClass = function getClass () {
-	    return MaximalEdgeRing
-	  };
+	        function rstr_hmac(key, data) {
+	          var bkey, ipad, opad, hash, i;
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          bkey = rstr2binl(key);
 
-	  return MaximalEdgeRing;
-	}(EdgeRing));
+	          if (bkey.length > 16) {
+	            bkey = binl(bkey, key.length * 8);
+	          }
 
-	var GraphComponent = function GraphComponent () {
-	  this._label = null;
-	  this._isInResult = false;
-	  this._isCovered = false;
-	  this._isCoveredSet = false;
-	  this._isVisited = false;
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var label = arguments[0];
-	    this._label = label;
-	  }
-	};
-	GraphComponent.prototype.setVisited = function setVisited (isVisited) {
-	  this._isVisited = isVisited;
-	};
-	GraphComponent.prototype.setInResult = function setInResult (isInResult) {
-	  this._isInResult = isInResult;
-	};
-	GraphComponent.prototype.isCovered = function isCovered () {
-	  return this._isCovered
-	};
-	GraphComponent.prototype.isCoveredSet = function isCoveredSet () {
-	  return this._isCoveredSet
-	};
-	GraphComponent.prototype.setLabel = function setLabel (label) {
-	  this._label = label;
-	};
-	GraphComponent.prototype.getLabel = function getLabel () {
-	  return this._label
-	};
-	GraphComponent.prototype.setCovered = function setCovered (isCovered) {
-	  this._isCovered = isCovered;
-	  this._isCoveredSet = true;
-	};
-	GraphComponent.prototype.updateIM = function updateIM (im) {
-	  Assert.isTrue(this._label.getGeometryCount() >= 2, 'found partial label');
-	  this.computeIM(im);
-	};
-	GraphComponent.prototype.isInResult = function isInResult () {
-	  return this._isInResult
-	};
-	GraphComponent.prototype.isVisited = function isVisited () {
-	  return this._isVisited
-	};
-	GraphComponent.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GraphComponent.prototype.getClass = function getClass () {
-	  return GraphComponent
-	};
+	          ipad = Array(16), opad = Array(16);
 
-	var Node$1 = (function (GraphComponent$$1) {
-	  function Node () {
-	    GraphComponent$$1.call(this);
-	    this._coord = null;
-	    this._edges = null;
-	    var coord = arguments[0];
-	    var edges = arguments[1];
-	    this._coord = coord;
-	    this._edges = edges;
-	    this._label = new Label(0, Location.NONE);
-	  }
-
-	  if ( GraphComponent$$1 ) { Node.__proto__ = GraphComponent$$1; }
-	  Node.prototype = Object.create( GraphComponent$$1 && GraphComponent$$1.prototype );
-	  Node.prototype.constructor = Node;
-	  Node.prototype.isIncidentEdgeInResult = function isIncidentEdgeInResult () {
-	    for (var it = this.getEdges().getEdges().iterator(); it.hasNext();) {
-	      var de = it.next();
-	      if (de.getEdge().isInResult()) { return true }
-	    }
-	    return false
-	  };
-	  Node.prototype.isIsolated = function isIsolated () {
-	    return this._label.getGeometryCount() === 1
-	  };
-	  Node.prototype.getCoordinate = function getCoordinate () {
-	    return this._coord
-	  };
-	  Node.prototype.print = function print (out) {
-	    out.println('node ' + this._coord + ' lbl: ' + this._label);
-	  };
-	  Node.prototype.computeIM = function computeIM (im) {};
-	  Node.prototype.computeMergedLocation = function computeMergedLocation (label2, eltIndex) {
-	    var loc = Location.NONE;
-	    loc = this._label.getLocation(eltIndex);
-	    if (!label2.isNull(eltIndex)) {
-	      var nLoc = label2.getLocation(eltIndex);
-	      if (loc !== Location.BOUNDARY) { loc = nLoc; }
-	    }
-	    return loc
-	  };
-	  Node.prototype.setLabel = function setLabel () {
-	    if (arguments.length === 2) {
-	      var argIndex = arguments[0];
-	      var onLocation = arguments[1];
-	      if (this._label === null) {
-	        this._label = new Label(argIndex, onLocation);
-	      } else { this._label.setLocation(argIndex, onLocation); }
-	    } else { return GraphComponent$$1.prototype.setLabel.apply(this, arguments) }
-	  };
-	  Node.prototype.getEdges = function getEdges () {
-	    return this._edges
-	  };
-	  Node.prototype.mergeLabel = function mergeLabel () {
-	    var this$1 = this;
-
-	    if (arguments[0] instanceof Node) {
-	      var n = arguments[0];
-	      this.mergeLabel(n._label);
-	    } else if (arguments[0] instanceof Label) {
-	      var label2 = arguments[0];
-	      for (var i = 0; i < 2; i++) {
-	        var loc = this$1.computeMergedLocation(label2, i);
-	        var thisLoc = this$1._label.getLocation(i);
-	        if (thisLoc === Location.NONE) { this$1._label.setLocation(i, loc); }
-	      }
-	    }
-	  };
-	  Node.prototype.add = function add (e) {
-	    this._edges.insert(e);
-	    e.setNode(this);
-	  };
-	  Node.prototype.setLabelBoundary = function setLabelBoundary (argIndex) {
-	    if (this._label === null) { return null }
-	    var loc = Location.NONE;
-	    if (this._label !== null) { loc = this._label.getLocation(argIndex); }
-	    var newLoc = null;
-	    switch (loc) {
-	      case Location.BOUNDARY:
-	        newLoc = Location.INTERIOR;
-	        break
-	      case Location.INTERIOR:
-	        newLoc = Location.BOUNDARY;
-	        break
-	      default:
-	        newLoc = Location.BOUNDARY;
-	        break
-	    }
-	    this._label.setLocation(argIndex, newLoc);
-	  };
-	  Node.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  Node.prototype.getClass = function getClass () {
-	    return Node
-	  };
+	          for (i = 0; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	  return Node;
-	}(GraphComponent));
+	          hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
+	          return binl2rstr(binl(opad.concat(hash), 512 + 128));
+	        }
+	        /**
+	         * Calculate the MD5 of an array of little-endian words, and a bit length.
+	         */
+
+
+	        function binl(x, len) {
+	          var i,
+	              olda,
+	              oldb,
+	              oldc,
+	              oldd,
+	              a = 1732584193,
+	              b = -271733879,
+	              c = -1732584194,
+	              d = 271733878;
+	          /* append padding */
+
+	          x[len >> 5] |= 0x80 << len % 32;
+	          x[(len + 64 >>> 9 << 4) + 14] = len;
+
+	          for (i = 0; i < x.length; i += 16) {
+	            olda = a;
+	            oldb = b;
+	            oldc = c;
+	            oldd = d;
+	            a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
+	            d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
+	            c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
+	            b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
+	            a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
+	            d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
+	            c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
+	            b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
+	            a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
+	            d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
+	            c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
+	            b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
+	            a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
+	            d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
+	            c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
+	            b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
+	            a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
+	            d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
+	            c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
+	            b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
+	            a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
+	            d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
+	            c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
+	            b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
+	            a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
+	            d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
+	            c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
+	            b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
+	            a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
+	            d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
+	            c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
+	            b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
+	            a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
+	            d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
+	            c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
+	            b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
+	            a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
+	            d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
+	            c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
+	            b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
+	            a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
+	            d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
+	            c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
+	            b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
+	            a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
+	            d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
+	            c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
+	            b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
+	            a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
+	            d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
+	            c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
+	            b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
+	            a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
+	            d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
+	            c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
+	            b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
+	            a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
+	            d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
+	            c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
+	            b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
+	            a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
+	            d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
+	            c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
+	            b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
+	            a = safe_add(a, olda);
+	            b = safe_add(b, oldb);
+	            c = safe_add(c, oldc);
+	            d = safe_add(d, oldd);
+	          }
 
-	var NodeMap = function NodeMap () {
-	  this.nodeMap = new TreeMap();
-	  this.nodeFact = null;
-	  var nodeFact = arguments[0];
-	  this.nodeFact = nodeFact;
-	};
-	NodeMap.prototype.find = function find (coord) {
-	  return this.nodeMap.get(coord)
-	};
-	NodeMap.prototype.addNode = function addNode () {
-	  if (arguments[0] instanceof Coordinate) {
-	    var coord = arguments[0];
-	    var node = this.nodeMap.get(coord);
-	    if (node === null) {
-	      node = this.nodeFact.createNode(coord);
-	      this.nodeMap.put(coord, node);
-	    }
-	    return node
-	  } else if (arguments[0] instanceof Node$1) {
-	    var n = arguments[0];
-	    var node$1 = this.nodeMap.get(n.getCoordinate());
-	    if (node$1 === null) {
-	      this.nodeMap.put(n.getCoordinate(), n);
-	      return n
-	    }
-	    node$1.mergeLabel(n);
-	    return node$1
-	  }
-	};
-	NodeMap.prototype.print = function print (out) {
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var n = it.next();
-	    n.print(out);
-	  }
-	};
-	NodeMap.prototype.iterator = function iterator () {
-	  return this.nodeMap.values().iterator()
-	};
-	NodeMap.prototype.values = function values () {
-	  return this.nodeMap.values()
-	};
-	NodeMap.prototype.getBoundaryNodes = function getBoundaryNodes (geomIndex) {
-	  var bdyNodes = new ArrayList();
-	  for (var i = this.iterator(); i.hasNext();) {
-	    var node = i.next();
-	    if (node.getLabel().getLocation(geomIndex) === Location.BOUNDARY) { bdyNodes.add(node); }
-	  }
-	  return bdyNodes
-	};
-	NodeMap.prototype.add = function add (e) {
-	  var p = e.getCoordinate();
-	  var n = this.addNode(p);
-	  n.add(e);
-	};
-	NodeMap.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	NodeMap.prototype.getClass = function getClass () {
-	  return NodeMap
-	};
+	          return Array(a, b, c, d);
+	        }
+	        /**
+	         * These functions implement the four basic operations the algorithm uses.
+	         */
 
-	var Quadrant = function Quadrant () {};
 
-	var staticAccessors$21 = { NE: { configurable: true },NW: { configurable: true },SW: { configurable: true },SE: { configurable: true } };
+	        function md5_cmn(q, a, b, x, s, t) {
+	          return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
+	        }
 
-	Quadrant.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Quadrant.prototype.getClass = function getClass () {
-	  return Quadrant
-	};
-	Quadrant.isNorthern = function isNorthern (quad) {
-	  return quad === Quadrant.NE || quad === Quadrant.NW
-	};
-	Quadrant.isOpposite = function isOpposite (quad1, quad2) {
-	  if (quad1 === quad2) { return false }
-	  var diff = (quad1 - quad2 + 4) % 4;
-	  if (diff === 2) { return true }
-	  return false
-	};
-	Quadrant.commonHalfPlane = function commonHalfPlane (quad1, quad2) {
-	  if (quad1 === quad2) { return quad1 }
-	  var diff = (quad1 - quad2 + 4) % 4;
-	  if (diff === 2) { return -1 }
-	  var min = quad1 < quad2 ? quad1 : quad2;
-	  var max = quad1 > quad2 ? quad1 : quad2;
-	  if (min === 0 && max === 3) { return 3 }
-	  return min
-	};
-	Quadrant.isInHalfPlane = function isInHalfPlane (quad, halfPlane) {
-	  if (halfPlane === Quadrant.SE) {
-	    return quad === Quadrant.SE || quad === Quadrant.SW
-	  }
-	  return quad === halfPlane || quad === halfPlane + 1
-	};
-	Quadrant.quadrant = function quadrant () {
-	  if (typeof arguments[0] === 'number' && typeof arguments[1] === 'number') {
-	    var dx = arguments[0];
-	    var dy = arguments[1];
-	    if (dx === 0.0 && dy === 0.0) { throw new IllegalArgumentException('Cannot compute the quadrant for point ( ' + dx + ', ' + dy + ' )') }
-	    if (dx >= 0.0) {
-	      if (dy >= 0.0) { return Quadrant.NE; } else { return Quadrant.SE }
-	    } else {
-	      if (dy >= 0.0) { return Quadrant.NW; } else { return Quadrant.SW }
-	    }
-	  } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Coordinate) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    if (p1.x === p0.x && p1.y === p0.y) { throw new IllegalArgumentException('Cannot compute the quadrant for two identical points ' + p0) }
-	    if (p1.x >= p0.x) {
-	      if (p1.y >= p0.y) { return Quadrant.NE; } else { return Quadrant.SE }
-	    } else {
-	      if (p1.y >= p0.y) { return Quadrant.NW; } else { return Quadrant.SW }
-	    }
-	  }
-	};
-	staticAccessors$21.NE.get = function () { return 0 };
-	staticAccessors$21.NW.get = function () { return 1 };
-	staticAccessors$21.SW.get = function () { return 2 };
-	staticAccessors$21.SE.get = function () { return 3 };
-
-	Object.defineProperties( Quadrant, staticAccessors$21 );
-
-	var EdgeEnd = function EdgeEnd () {
-	  this._edge = null;
-	  this._label = null;
-	  this._node = null;
-	  this._p0 = null;
-	  this._p1 = null;
-	  this._dx = null;
-	  this._dy = null;
-	  this._quadrant = null;
-	  if (arguments.length === 1) {
-	    var edge = arguments[0];
-	    this._edge = edge;
-	  } else if (arguments.length === 3) {
-	    var edge$1 = arguments[0];
-	    var p0 = arguments[1];
-	    var p1 = arguments[2];
-	    var label = null;
-	    this._edge = edge$1;
-	    this.init(p0, p1);
-	    this._label = label;
-	  } else if (arguments.length === 4) {
-	    var edge$2 = arguments[0];
-	    var p0$1 = arguments[1];
-	    var p1$1 = arguments[2];
-	    var label$1 = arguments[3];
-	    this._edge = edge$2;
-	    this.init(p0$1, p1$1);
-	    this._label = label$1;
-	  }
-	};
-	EdgeEnd.prototype.compareDirection = function compareDirection (e) {
-	  if (this._dx === e._dx && this._dy === e._dy) { return 0 }
-	  if (this._quadrant > e._quadrant) { return 1 }
-	  if (this._quadrant < e._quadrant) { return -1 }
-	  return CGAlgorithms.computeOrientation(e._p0, e._p1, this._p1)
-	};
-	EdgeEnd.prototype.getDy = function getDy () {
-	  return this._dy
-	};
-	EdgeEnd.prototype.getCoordinate = function getCoordinate () {
-	  return this._p0
-	};
-	EdgeEnd.prototype.setNode = function setNode (node) {
-	  this._node = node;
-	};
-	EdgeEnd.prototype.print = function print (out) {
-	  var angle = Math.atan2(this._dy, this._dx);
-	  var className = this.getClass().getName();
-	  var lastDotPos = className.lastIndexOf('.');
-	  var name = className.substring(lastDotPos + 1);
-	  out.print('  ' + name + ': ' + this._p0 + ' - ' + this._p1 + ' ' + this._quadrant + ':' + angle + '   ' + this._label);
-	};
-	EdgeEnd.prototype.compareTo = function compareTo (obj) {
-	  var e = obj;
-	  return this.compareDirection(e)
-	};
-	EdgeEnd.prototype.getDirectedCoordinate = function getDirectedCoordinate () {
-	  return this._p1
-	};
-	EdgeEnd.prototype.getDx = function getDx () {
-	  return this._dx
-	};
-	EdgeEnd.prototype.getLabel = function getLabel () {
-	  return this._label
-	};
-	EdgeEnd.prototype.getEdge = function getEdge () {
-	  return this._edge
-	};
-	EdgeEnd.prototype.getQuadrant = function getQuadrant () {
-	  return this._quadrant
-	};
-	EdgeEnd.prototype.getNode = function getNode () {
-	  return this._node
-	};
-	EdgeEnd.prototype.toString = function toString () {
-	  var angle = Math.atan2(this._dy, this._dx);
-	  var className = this.getClass().getName();
-	  var lastDotPos = className.lastIndexOf('.');
-	  var name = className.substring(lastDotPos + 1);
-	  return '  ' + name + ': ' + this._p0 + ' - ' + this._p1 + ' ' + this._quadrant + ':' + angle + '   ' + this._label
-	};
-	EdgeEnd.prototype.computeLabel = function computeLabel (boundaryNodeRule) {};
-	EdgeEnd.prototype.init = function init (p0, p1) {
-	  this._p0 = p0;
-	  this._p1 = p1;
-	  this._dx = p1.x - p0.x;
-	  this._dy = p1.y - p0.y;
-	  this._quadrant = Quadrant.quadrant(this._dx, this._dy);
-	  Assert.isTrue(!(this._dx === 0 && this._dy === 0), 'EdgeEnd with identical endpoints found');
-	};
-	EdgeEnd.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	EdgeEnd.prototype.getClass = function getClass () {
-	  return EdgeEnd
-	};
+	        function md5_ff(a, b, c, d, x, s, t) {
+	          return md5_cmn(b & c | ~b & d, a, b, x, s, t);
+	        }
+
+	        function md5_gg(a, b, c, d, x, s, t) {
+	          return md5_cmn(b & d | c & ~d, a, b, x, s, t);
+	        }
+
+	        function md5_hh(a, b, c, d, x, s, t) {
+	          return md5_cmn(b ^ c ^ d, a, b, x, s, t);
+	        }
 
-	var DirectedEdge = (function (EdgeEnd$$1) {
-	  function DirectedEdge () {
-	    var edge = arguments[0];
-	    var isForward = arguments[1];
-	    EdgeEnd$$1.call(this, edge);
-	    this._isForward = null;
-	    this._isInResult = false;
-	    this._isVisited = false;
-	    this._sym = null;
-	    this._next = null;
-	    this._nextMin = null;
-	    this._edgeRing = null;
-	    this._minEdgeRing = null;
-	    this._depth = [0, -999, -999];
-	    this._isForward = isForward;
-	    if (isForward) {
-	      this.init(edge.getCoordinate(0), edge.getCoordinate(1));
-	    } else {
-	      var n = edge.getNumPoints() - 1;
-	      this.init(edge.getCoordinate(n), edge.getCoordinate(n - 1));
-	    }
-	    this.computeDirectedLabel();
-	  }
+	        function md5_ii(a, b, c, d, x, s, t) {
+	          return md5_cmn(c ^ (b | ~d), a, b, x, s, t);
+	        }
+	      },
 
-	  if ( EdgeEnd$$1 ) { DirectedEdge.__proto__ = EdgeEnd$$1; }
-	  DirectedEdge.prototype = Object.create( EdgeEnd$$1 && EdgeEnd$$1.prototype );
-	  DirectedEdge.prototype.constructor = DirectedEdge;
-	  DirectedEdge.prototype.getNextMin = function getNextMin () {
-	    return this._nextMin
-	  };
-	  DirectedEdge.prototype.getDepth = function getDepth (position) {
-	    return this._depth[position]
-	  };
-	  DirectedEdge.prototype.setVisited = function setVisited (isVisited) {
-	    this._isVisited = isVisited;
-	  };
-	  DirectedEdge.prototype.computeDirectedLabel = function computeDirectedLabel () {
-	    this._label = new Label(this._edge.getLabel());
-	    if (!this._isForward) { this._label.flip(); }
-	  };
-	  DirectedEdge.prototype.getNext = function getNext () {
-	    return this._next
-	  };
-	  DirectedEdge.prototype.setDepth = function setDepth (position, depthVal) {
-	    if (this._depth[position] !== -999) {
-	      if (this._depth[position] !== depthVal) { throw new TopologyException('assigned depths do not match', this.getCoordinate()) }
-	    }
-	    this._depth[position] = depthVal;
-	  };
-	  DirectedEdge.prototype.isInteriorAreaEdge = function isInteriorAreaEdge () {
-	    var this$1 = this;
+	      /**
+	       * @member Hashes
+	       * @class Hashes.SHA1
+	       * @param {Object} [config]
+	       * @constructor
+	       *
+	       * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined in FIPS 180-1
+	       * Version 2.2 Copyright Paul Johnston 2000 - 2009.
+	       * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+	       * See http://pajhome.org.uk/crypt/md5 for details.
+	       */
+	      SHA1: function SHA1(options) {
+	        /**
+	         * Private config properties. You may need to tweak these to be compatible with
+	         * the server-side, but the defaults work in most cases.
+	         * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
+	         */
+	        var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
+	            // hexadecimal output case format. false - lowercase; true - uppercase
+	        b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
+	            // base-64 pad character. Defaults to '=' for strict RFC compliance
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true; // enable/disable utf8 encoding
+	        // public methods
+
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s), hexcase);
+	        };
 
-	    var isInteriorAreaEdge = true;
-	    for (var i = 0; i < 2; i++) {
-	      if (!(this$1._label.isArea(i) && this$1._label.getLocation(i, Position.LEFT) === Location.INTERIOR && this$1._label.getLocation(i, Position.RIGHT) === Location.INTERIOR)) {
-	        isInteriorAreaEdge = false;
-	      }
-	    }
-	    return isInteriorAreaEdge
-	  };
-	  DirectedEdge.prototype.setNextMin = function setNextMin (nextMin) {
-	    this._nextMin = nextMin;
-	  };
-	  DirectedEdge.prototype.print = function print (out) {
-	    EdgeEnd$$1.prototype.print.call(this, out);
-	    out.print(' ' + this._depth[Position.LEFT] + '/' + this._depth[Position.RIGHT]);
-	    out.print(' (' + this.getDepthDelta() + ')');
-	    if (this._isInResult) { out.print(' inResult'); }
-	  };
-	  DirectedEdge.prototype.setMinEdgeRing = function setMinEdgeRing (minEdgeRing) {
-	    this._minEdgeRing = minEdgeRing;
-	  };
-	  DirectedEdge.prototype.isLineEdge = function isLineEdge () {
-	    var isLine = this._label.isLine(0) || this._label.isLine(1);
-	    var isExteriorIfArea0 = !this._label.isArea(0) || this._label.allPositionsEqual(0, Location.EXTERIOR);
-	    var isExteriorIfArea1 = !this._label.isArea(1) || this._label.allPositionsEqual(1, Location.EXTERIOR);
-	    return isLine && isExteriorIfArea0 && isExteriorIfArea1
-	  };
-	  DirectedEdge.prototype.setEdgeRing = function setEdgeRing (edgeRing) {
-	    this._edgeRing = edgeRing;
-	  };
-	  DirectedEdge.prototype.getMinEdgeRing = function getMinEdgeRing () {
-	    return this._minEdgeRing
-	  };
-	  DirectedEdge.prototype.getDepthDelta = function getDepthDelta () {
-	    var depthDelta = this._edge.getDepthDelta();
-	    if (!this._isForward) { depthDelta = -depthDelta; }
-	    return depthDelta
-	  };
-	  DirectedEdge.prototype.setInResult = function setInResult (isInResult) {
-	    this._isInResult = isInResult;
-	  };
-	  DirectedEdge.prototype.getSym = function getSym () {
-	    return this._sym
-	  };
-	  DirectedEdge.prototype.isForward = function isForward () {
-	    return this._isForward
-	  };
-	  DirectedEdge.prototype.getEdge = function getEdge () {
-	    return this._edge
-	  };
-	  DirectedEdge.prototype.printEdge = function printEdge (out) {
-	    this.print(out);
-	    out.print(' ');
-	    if (this._isForward) { this._edge.print(out); } else { this._edge.printReverse(out); }
-	  };
-	  DirectedEdge.prototype.setSym = function setSym (de) {
-	    this._sym = de;
-	  };
-	  DirectedEdge.prototype.setVisitedEdge = function setVisitedEdge (isVisited) {
-	    this.setVisited(isVisited);
-	    this._sym.setVisited(isVisited);
-	  };
-	  DirectedEdge.prototype.setEdgeDepths = function setEdgeDepths (position, depth) {
-	    var depthDelta = this.getEdge().getDepthDelta();
-	    if (!this._isForward) { depthDelta = -depthDelta; }
-	    var directionFactor = 1;
-	    if (position === Position.LEFT) { directionFactor = -1; }
-	    var oppositePos = Position.opposite(position);
-	    var delta = depthDelta * directionFactor;
-	    var oppositeDepth = depth + delta;
-	    this.setDepth(position, depth);
-	    this.setDepth(oppositePos, oppositeDepth);
-	  };
-	  DirectedEdge.prototype.getEdgeRing = function getEdgeRing () {
-	    return this._edgeRing
-	  };
-	  DirectedEdge.prototype.isInResult = function isInResult () {
-	    return this._isInResult
-	  };
-	  DirectedEdge.prototype.setNext = function setNext (next) {
-	    this._next = next;
-	  };
-	  DirectedEdge.prototype.isVisited = function isVisited () {
-	    return this._isVisited
-	  };
-	  DirectedEdge.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  DirectedEdge.prototype.getClass = function getClass () {
-	    return DirectedEdge
-	  };
-	  DirectedEdge.depthFactor = function depthFactor (currLocation, nextLocation) {
-	    if (currLocation === Location.EXTERIOR && nextLocation === Location.INTERIOR) { return 1; } else if (currLocation === Location.INTERIOR && nextLocation === Location.EXTERIOR) { return -1 }
-	    return 0
-	  };
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	  return DirectedEdge;
-	}(EdgeEnd));
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	var NodeFactory = function NodeFactory () {};
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	NodeFactory.prototype.createNode = function createNode (coord) {
-	  return new Node$1(coord, null)
-	};
-	NodeFactory.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	NodeFactory.prototype.getClass = function getClass () {
-	  return NodeFactory
-	};
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	var PlanarGraph = function PlanarGraph () {
-	  this._edges = new ArrayList();
-	  this._nodes = null;
-	  this._edgeEndList = new ArrayList();
-	  if (arguments.length === 0) {
-	    this._nodes = new NodeMap(new NodeFactory());
-	  } else if (arguments.length === 1) {
-	    var nodeFact = arguments[0];
-	    this._nodes = new NodeMap(nodeFact);
-	  }
-	};
-	PlanarGraph.prototype.printEdges = function printEdges (out) {
-	    var this$1 = this;
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	  out.println('Edges:');
-	  for (var i = 0; i < this._edges.size(); i++) {
-	    out.println('edge ' + i + ':');
-	    var e = this$1._edges.get(i);
-	    e.print(out);
-	    e.eiList.print(out);
-	  }
-	};
-	PlanarGraph.prototype.find = function find (coord) {
-	  return this._nodes.find(coord)
-	};
-	PlanarGraph.prototype.addNode = function addNode () {
-	  if (arguments[0] instanceof Node$1) {
-	    var node = arguments[0];
-	    return this._nodes.addNode(node)
-	  } else if (arguments[0] instanceof Coordinate) {
-	    var coord = arguments[0];
-	    return this._nodes.addNode(coord)
-	  }
-	};
-	PlanarGraph.prototype.getNodeIterator = function getNodeIterator () {
-	  return this._nodes.iterator()
-	};
-	PlanarGraph.prototype.linkResultDirectedEdges = function linkResultDirectedEdges () {
-	  for (var nodeit = this._nodes.iterator(); nodeit.hasNext();) {
-	    var node = nodeit.next();
-	    node.getEdges().linkResultDirectedEdges();
-	  }
-	};
-	PlanarGraph.prototype.debugPrintln = function debugPrintln (o) {
-	  System.out.println(o);
-	};
-	PlanarGraph.prototype.isBoundaryNode = function isBoundaryNode (geomIndex, coord) {
-	  var node = this._nodes.find(coord);
-	  if (node === null) { return false }
-	  var label = node.getLabel();
-	  if (label !== null && label.getLocation(geomIndex) === Location.BOUNDARY) { return true }
-	  return false
-	};
-	PlanarGraph.prototype.linkAllDirectedEdges = function linkAllDirectedEdges () {
-	  for (var nodeit = this._nodes.iterator(); nodeit.hasNext();) {
-	    var node = nodeit.next();
-	    node.getEdges().linkAllDirectedEdges();
-	  }
-	};
-	PlanarGraph.prototype.matchInSameDirection = function matchInSameDirection (p0, p1, ep0, ep1) {
-	  if (!p0.equals(ep0)) { return false }
-	  if (CGAlgorithms.computeOrientation(p0, p1, ep1) === CGAlgorithms.COLLINEAR && Quadrant.quadrant(p0, p1) === Quadrant.quadrant(ep0, ep1)) { return true }
-	  return false
-	};
-	PlanarGraph.prototype.getEdgeEnds = function getEdgeEnds () {
-	  return this._edgeEndList
-	};
-	PlanarGraph.prototype.debugPrint = function debugPrint (o) {
-	  System.out.print(o);
-	};
-	PlanarGraph.prototype.getEdgeIterator = function getEdgeIterator () {
-	  return this._edges.iterator()
-	};
-	PlanarGraph.prototype.findEdgeInSameDirection = function findEdgeInSameDirection (p0, p1) {
-	    var this$1 = this;
+	        this.any_hmac = function (k, d, e) {
+	          return rstr2any(rstr_hmac(k, d), e);
+	        };
+	        /**
+	         * Perform a simple self-test to see if the VM is working
+	         * @return {String} Hexadecimal hash sample
+	         * @public
+	         */
 
-	  for (var i = 0; i < this._edges.size(); i++) {
-	    var e = this$1._edges.get(i);
-	    var eCoord = e.getCoordinates();
-	    if (this$1.matchInSameDirection(p0, p1, eCoord[0], eCoord[1])) { return e }
-	    if (this$1.matchInSameDirection(p0, p1, eCoord[eCoord.length - 1], eCoord[eCoord.length - 2])) { return e }
-	  }
-	  return null
-	};
-	PlanarGraph.prototype.insertEdge = function insertEdge (e) {
-	  this._edges.add(e);
-	};
-	PlanarGraph.prototype.findEdgeEnd = function findEdgeEnd (e) {
-	  for (var i = this.getEdgeEnds().iterator(); i.hasNext();) {
-	    var ee = i.next();
-	    if (ee.getEdge() === e) { return ee }
-	  }
-	  return null
-	};
-	PlanarGraph.prototype.addEdges = function addEdges (edgesToAdd) {
-	    var this$1 = this;
-
-	  for (var it = edgesToAdd.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    this$1._edges.add(e);
-	    var de1 = new DirectedEdge(e, true);
-	    var de2 = new DirectedEdge(e, false);
-	    de1.setSym(de2);
-	    de2.setSym(de1);
-	    this$1.add(de1);
-	    this$1.add(de2);
-	  }
-	};
-	PlanarGraph.prototype.add = function add (e) {
-	  this._nodes.add(e);
-	  this._edgeEndList.add(e);
-	};
-	PlanarGraph.prototype.getNodes = function getNodes () {
-	  return this._nodes.values()
-	};
-	PlanarGraph.prototype.findEdge = function findEdge (p0, p1) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < this._edges.size(); i++) {
-	    var e = this$1._edges.get(i);
-	    var eCoord = e.getCoordinates();
-	    if (p0.equals(eCoord[0]) && p1.equals(eCoord[1])) { return e }
-	  }
-	  return null
-	};
-	PlanarGraph.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PlanarGraph.prototype.getClass = function getClass () {
-	  return PlanarGraph
-	};
-	PlanarGraph.linkResultDirectedEdges = function linkResultDirectedEdges (nodes) {
-	  for (var nodeit = nodes.iterator(); nodeit.hasNext();) {
-	    var node = nodeit.next();
-	    node.getEdges().linkResultDirectedEdges();
-	  }
-	};
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * @description Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	var PolygonBuilder = function PolygonBuilder () {
-	  this._geometryFactory = null;
-	  this._shellList = new ArrayList();
-	  var geometryFactory = arguments[0];
-	  this._geometryFactory = geometryFactory;
-	};
-	PolygonBuilder.prototype.sortShellsAndHoles = function sortShellsAndHoles (edgeRings, shellList, freeHoleList) {
-	  for (var it = edgeRings.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    if (er.isHole()) {
-	      freeHoleList.add(er);
-	    } else {
-	      shellList.add(er);
-	    }
-	  }
-	};
-	PolygonBuilder.prototype.computePolygons = function computePolygons (shellList) {
-	    var this$1 = this;
 
-	  var resultPolyList = new ArrayList();
-	  for (var it = shellList.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    var poly = er.toPolygon(this$1._geometryFactory);
-	    resultPolyList.add(poly);
-	  }
-	  return resultPolyList
-	};
-	PolygonBuilder.prototype.placeFreeHoles = function placeFreeHoles (shellList, freeHoleList) {
-	    var this$1 = this;
+	        this.setUpperCase = function (a) {
+	          if (typeof a === 'boolean') {
+	            hexcase = a;
+	          }
 
-	  for (var it = freeHoleList.iterator(); it.hasNext();) {
-	    var hole = it.next();
-	    if (hole.getShell() === null) {
-	      var shell = this$1.findEdgeRingContaining(hole, shellList);
-	      if (shell === null) { throw new TopologyException('unable to assign hole to a shell', hole.getCoordinate(0)) }
-	      hole.setShell(shell);
-	    }
-	  }
-	};
-	PolygonBuilder.prototype.buildMinimalEdgeRings = function buildMinimalEdgeRings (maxEdgeRings, shellList, freeHoleList) {
-	    var this$1 = this;
-
-	  var edgeRings = new ArrayList();
-	  for (var it = maxEdgeRings.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    if (er.getMaxNodeDegree() > 2) {
-	      er.linkDirectedEdgesForMinimalEdgeRings();
-	      var minEdgeRings = er.buildMinimalRings();
-	      var shell = this$1.findShell(minEdgeRings);
-	      if (shell !== null) {
-	        this$1.placePolygonHoles(shell, minEdgeRings);
-	        shellList.add(shell);
-	      } else {
-	        freeHoleList.addAll(minEdgeRings);
-	      }
-	    } else {
-	      edgeRings.add(er);
-	    }
-	  }
-	  return edgeRings
-	};
-	PolygonBuilder.prototype.containsPoint = function containsPoint (p) {
-	  for (var it = this._shellList.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    if (er.containsPoint(p)) { return true }
-	  }
-	  return false
-	};
-	PolygonBuilder.prototype.buildMaximalEdgeRings = function buildMaximalEdgeRings (dirEdges) {
-	    var this$1 = this;
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	  var maxEdgeRings = new ArrayList();
-	  for (var it = dirEdges.iterator(); it.hasNext();) {
-	    var de = it.next();
-	    if (de.isInResult() && de.getLabel().isArea()) {
-	      if (de.getEdgeRing() === null) {
-	        var er = new MaximalEdgeRing(de, this$1._geometryFactory);
-	        maxEdgeRings.add(er);
-	        er.setInResult();
-	      }
-	    }
-	  }
-	  return maxEdgeRings
-	};
-	PolygonBuilder.prototype.placePolygonHoles = function placePolygonHoles (shell, minEdgeRings) {
-	  for (var it = minEdgeRings.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    if (er.isHole()) {
-	      er.setShell(shell);
-	    }
-	  }
-	};
-	PolygonBuilder.prototype.getPolygons = function getPolygons () {
-	  var resultPolyList = this.computePolygons(this._shellList);
-	  return resultPolyList
-	};
-	PolygonBuilder.prototype.findEdgeRingContaining = function findEdgeRingContaining (testEr, shellList) {
-	  var testRing = testEr.getLinearRing();
-	  var testEnv = testRing.getEnvelopeInternal();
-	  var testPt = testRing.getCoordinateN(0);
-	  var minShell = null;
-	  var minEnv = null;
-	  for (var it = shellList.iterator(); it.hasNext();) {
-	    var tryShell = it.next();
-	    var tryRing = tryShell.getLinearRing();
-	    var tryEnv = tryRing.getEnvelopeInternal();
-	    if (minShell !== null) { minEnv = minShell.getLinearRing().getEnvelopeInternal(); }
-	    var isContained = false;
-	    if (tryEnv.contains(testEnv) && CGAlgorithms.isPointInRing(testPt, tryRing.getCoordinates())) { isContained = true; }
-	    if (isContained) {
-	      if (minShell === null || minEnv.contains(tryEnv)) {
-	        minShell = tryShell;
-	      }
-	    }
-	  }
-	  return minShell
-	};
-	PolygonBuilder.prototype.findShell = function findShell (minEdgeRings) {
-	  var shellCount = 0;
-	  var shell = null;
-	  for (var it = minEdgeRings.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    if (!er.isHole()) {
-	      shell = er;
-	      shellCount++;
-	    }
-	  }
-	  Assert.isTrue(shellCount <= 1, 'found two shells in MinimalEdgeRing list');
-	  return shell
-	};
-	PolygonBuilder.prototype.add = function add () {
-	  if (arguments.length === 1) {
-	    var graph = arguments[0];
-	    this.add(graph.getEdgeEnds(), graph.getNodes());
-	  } else if (arguments.length === 2) {
-	    var dirEdges = arguments[0];
-	    var nodes = arguments[1];
-	    PlanarGraph.linkResultDirectedEdges(nodes);
-	    var maxEdgeRings = this.buildMaximalEdgeRings(dirEdges);
-	    var freeHoleList = new ArrayList();
-	    var edgeRings = this.buildMinimalEdgeRings(maxEdgeRings, this._shellList, freeHoleList);
-	    this.sortShellsAndHoles(edgeRings, this._shellList, freeHoleList);
-	    this.placeFreeHoles(this._shellList, freeHoleList);
-	  }
-	};
-	PolygonBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PolygonBuilder.prototype.getClass = function getClass () {
-	  return PolygonBuilder
-	};
 
-	var Boundable = function Boundable () {};
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	Boundable.prototype.getBounds = function getBounds () {};
-	Boundable.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Boundable.prototype.getClass = function getClass () {
-	  return Boundable
-	};
 
-	var ItemBoundable = function ItemBoundable () {
-	  this._bounds = null;
-	  this._item = null;
-	  var bounds = arguments[0];
-	  var item = arguments[1];
-	  this._bounds = bounds;
-	  this._item = item;
-	};
-	ItemBoundable.prototype.getItem = function getItem () {
-	  return this._item
-	};
-	ItemBoundable.prototype.getBounds = function getBounds () {
-	  return this._bounds
-	};
-	ItemBoundable.prototype.interfaces_ = function interfaces_ () {
-	  return [Boundable, Serializable]
-	};
-	ItemBoundable.prototype.getClass = function getClass () {
-	  return ItemBoundable
-	};
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	var PriorityQueue = function PriorityQueue () {
-	  this._size = null;
-	  this._items = null;
-	  this._size = 0;
-	  this._items = new ArrayList();
-	  this._items.add(null);
-	};
-	PriorityQueue.prototype.poll = function poll () {
-	  if (this.isEmpty()) { return null }
-	  var minItem = this._items.get(1);
-	  this._items.set(1, this._items.get(this._size));
-	  this._size -= 1;
-	  this.reorder(1);
-	  return minItem
-	};
-	PriorityQueue.prototype.size = function size () {
-	  return this._size
-	};
-	PriorityQueue.prototype.reorder = function reorder (hole) {
-	    var this$1 = this;
+	          return this;
+	        }; // private methods
 
-	  var child = null;
-	  var tmp = this._items.get(hole);
-	  for (; hole * 2 <= this._size; hole = child) {
-	    child = hole * 2;
-	    if (child !== this$1._size && this$1._items.get(child + 1).compareTo(this$1._items.get(child)) < 0) { child++; }
-	    if (this$1._items.get(child).compareTo(tmp) < 0) { this$1._items.set(hole, this$1._items.get(child)); } else { break }
-	  }
-	  this._items.set(hole, tmp);
-	};
-	PriorityQueue.prototype.clear = function clear () {
-	  this._size = 0;
-	  this._items.clear();
-	};
-	PriorityQueue.prototype.isEmpty = function isEmpty () {
-	  return this._size === 0
-	};
-	PriorityQueue.prototype.add = function add (x) {
-	    var this$1 = this;
+	        /**
+	         * Calculate the SHA-512 of a raw string
+	         */
 
-	  this._items.add(null);
-	  this._size += 1;
-	  var hole = this._size;
-	  this._items.set(0, x);
-	  for (; x.compareTo(this._items.get(Math.trunc(hole / 2))) < 0; hole /= 2) {
-	    this$1._items.set(hole, this$1._items.get(Math.trunc(hole / 2)));
-	  }
-	  this._items.set(hole, x);
-	};
-	PriorityQueue.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PriorityQueue.prototype.getClass = function getClass () {
-	  return PriorityQueue
-	};
 
-	var ItemVisitor = function ItemVisitor () {};
+	        function rstr(s) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binb2rstr(binb(rstr2binb(s), s.length * 8));
+	        }
+	        /**
+	         * Calculate the HMAC-SHA1 of a key and some data (raw strings)
+	         */
 
-	ItemVisitor.prototype.visitItem = function visitItem (item) {};
-	ItemVisitor.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	ItemVisitor.prototype.getClass = function getClass () {
-	  return ItemVisitor
-	};
 
-	var SpatialIndex = function SpatialIndex () {};
+	        function rstr_hmac(key, data) {
+	          var bkey, ipad, opad, i, hash;
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          bkey = rstr2binb(key);
 
-	SpatialIndex.prototype.insert = function insert (itemEnv, item) {};
-	SpatialIndex.prototype.remove = function remove (itemEnv, item) {};
-	SpatialIndex.prototype.query = function query () {
-	  // if (arguments.length === 1) {
-	  // const searchEnv = arguments[0]
-	  // } else if (arguments.length === 2) {
-	  // const searchEnv = arguments[0]
-	  // const visitor = arguments[1]
-	  // }
-	};
-	SpatialIndex.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SpatialIndex.prototype.getClass = function getClass () {
-	  return SpatialIndex
-	};
+	          if (bkey.length > 16) {
+	            bkey = binb(bkey, key.length * 8);
+	          }
 
-	var AbstractNode = function AbstractNode () {
-	  this._childBoundables = new ArrayList();
-	  this._bounds = null;
-	  this._level = null;
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var level = arguments[0];
-	    this._level = level;
-	  }
-	};
+	          ipad = Array(16), opad = Array(16);
 
-	var staticAccessors$22 = { serialVersionUID: { configurable: true } };
-	AbstractNode.prototype.getLevel = function getLevel () {
-	  return this._level
-	};
-	AbstractNode.prototype.size = function size () {
-	  return this._childBoundables.size()
-	};
-	AbstractNode.prototype.getChildBoundables = function getChildBoundables () {
-	  return this._childBoundables
-	};
-	AbstractNode.prototype.addChildBoundable = function addChildBoundable (childBoundable) {
-	  Assert.isTrue(this._bounds === null);
-	  this._childBoundables.add(childBoundable);
-	};
-	AbstractNode.prototype.isEmpty = function isEmpty () {
-	  return this._childBoundables.isEmpty()
-	};
-	AbstractNode.prototype.getBounds = function getBounds () {
-	  if (this._bounds === null) {
-	    this._bounds = this.computeBounds();
-	  }
-	  return this._bounds
-	};
-	AbstractNode.prototype.interfaces_ = function interfaces_ () {
-	  return [Boundable, Serializable]
-	};
-	AbstractNode.prototype.getClass = function getClass () {
-	  return AbstractNode
-	};
-	staticAccessors$22.serialVersionUID.get = function () { return 6493722185909573708 };
+	          for (i = 0; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	Object.defineProperties( AbstractNode, staticAccessors$22 );
+	          hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
+	          return binb2rstr(binb(opad.concat(hash), 512 + 160));
+	        }
+	        /**
+	         * Calculate the SHA-1 of an array of big-endian words, and a bit length
+	         */
+
+
+	        function binb(x, len) {
+	          var i,
+	              j,
+	              t,
+	              olda,
+	              oldb,
+	              oldc,
+	              oldd,
+	              olde,
+	              w = Array(80),
+	              a = 1732584193,
+	              b = -271733879,
+	              c = -1732584194,
+	              d = 271733878,
+	              e = -1009589776;
+	          /* append padding */
+
+	          x[len >> 5] |= 0x80 << 24 - len % 32;
+	          x[(len + 64 >> 9 << 4) + 15] = len;
+
+	          for (i = 0; i < x.length; i += 16) {
+	            olda = a;
+	            oldb = b;
+	            oldc = c;
+	            oldd = d;
+	            olde = e;
+
+	            for (j = 0; j < 80; j += 1) {
+	              if (j < 16) {
+	                w[j] = x[i + j];
+	              } else {
+	                w[j] = bit_rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
+	              }
 
-	var Collections = function Collections () {};
+	              t = safe_add(safe_add(bit_rol(a, 5), sha1_ft(j, b, c, d)), safe_add(safe_add(e, w[j]), sha1_kt(j)));
+	              e = d;
+	              d = c;
+	              c = bit_rol(b, 30);
+	              b = a;
+	              a = t;
+	            }
 
-	Collections.reverseOrder = function reverseOrder () {
-	  return {
-	    compare: function compare (a, b) {
-	      return b.compareTo(a)
-	    }
-	  }
-	};
-	Collections.min = function min (l) {
-	  Collections.sort(l);
-	  return l.get(0)
-	};
-	Collections.sort = function sort (l, c) {
-	  var a = l.toArray();
-	  if (c) {
-	    Arrays.sort(a, c);
-	  } else {
-	    Arrays.sort(a);
-	  }
-	  var i = l.iterator();
-	  for (var pos = 0, alen = a.length; pos < alen; pos++) {
-	    i.next();
-	    i.set(a[pos]);
-	  }
-	};
-	Collections.singletonList = function singletonList (o) {
-	  var arrayList = new ArrayList();
-	  arrayList.add(o);
-	  return arrayList
-	};
+	            a = safe_add(a, olda);
+	            b = safe_add(b, oldb);
+	            c = safe_add(c, oldc);
+	            d = safe_add(d, oldd);
+	            e = safe_add(e, olde);
+	          }
 
-	var BoundablePair = function BoundablePair () {
-	  this._boundable1 = null;
-	  this._boundable2 = null;
-	  this._distance = null;
-	  this._itemDistance = null;
-	  var boundable1 = arguments[0];
-	  var boundable2 = arguments[1];
-	  var itemDistance = arguments[2];
-	  this._boundable1 = boundable1;
-	  this._boundable2 = boundable2;
-	  this._itemDistance = itemDistance;
-	  this._distance = this.distance();
-	};
-	BoundablePair.prototype.expandToQueue = function expandToQueue (priQ, minDistance) {
-	  var isComp1 = BoundablePair.isComposite(this._boundable1);
-	  var isComp2 = BoundablePair.isComposite(this._boundable2);
-	  if (isComp1 && isComp2) {
-	    if (BoundablePair.area(this._boundable1) > BoundablePair.area(this._boundable2)) {
-	      this.expand(this._boundable1, this._boundable2, priQ, minDistance);
-	      return null
-	    } else {
-	      this.expand(this._boundable2, this._boundable1, priQ, minDistance);
-	      return null
-	    }
-	  } else if (isComp1) {
-	    this.expand(this._boundable1, this._boundable2, priQ, minDistance);
-	    return null
-	  } else if (isComp2) {
-	    this.expand(this._boundable2, this._boundable1, priQ, minDistance);
-	    return null
-	  }
-	  throw new IllegalArgumentException('neither boundable is composite')
-	};
-	BoundablePair.prototype.isLeaves = function isLeaves () {
-	  return !(BoundablePair.isComposite(this._boundable1) || BoundablePair.isComposite(this._boundable2))
-	};
-	BoundablePair.prototype.compareTo = function compareTo (o) {
-	  var nd = o;
-	  if (this._distance < nd._distance) { return -1 }
-	  if (this._distance > nd._distance) { return 1 }
-	  return 0
-	};
-	BoundablePair.prototype.expand = function expand (bndComposite, bndOther, priQ, minDistance) {
-	    var this$1 = this;
+	          return Array(a, b, c, d, e);
+	        }
+	        /**
+	         * Perform the appropriate triplet combination function for the current
+	         * iteration
+	         */
 
-	  var children = bndComposite.getChildBoundables();
-	  for (var i = children.iterator(); i.hasNext();) {
-	    var child = i.next();
-	    var bp = new BoundablePair(child, bndOther, this$1._itemDistance);
-	    if (bp.getDistance() < minDistance) {
-	      priQ.add(bp);
-	    }
-	  }
-	};
-	BoundablePair.prototype.getBoundable = function getBoundable (i) {
-	  if (i === 0) { return this._boundable1 }
-	  return this._boundable2
-	};
-	BoundablePair.prototype.getDistance = function getDistance () {
-	  return this._distance
-	};
-	BoundablePair.prototype.distance = function distance () {
-	  if (this.isLeaves()) {
-	    return this._itemDistance.distance(this._boundable1, this._boundable2)
-	  }
-	  return this._boundable1.getBounds().distance(this._boundable2.getBounds())
-	};
-	BoundablePair.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	BoundablePair.prototype.getClass = function getClass () {
-	  return BoundablePair
-	};
-	BoundablePair.area = function area (b) {
-	  return b.getBounds().getArea()
-	};
-	BoundablePair.isComposite = function isComposite (item) {
-	  return item instanceof AbstractNode
-	};
 
-	var AbstractSTRtree = function AbstractSTRtree () {
-	  this._root = null;
-	  this._built = false;
-	  this._itemBoundables = new ArrayList();
-	  this._nodeCapacity = null;
-	  if (arguments.length === 0) {
-	    var nodeCapacity = AbstractSTRtree.DEFAULT_NODE_CAPACITY;
-	    this._nodeCapacity = nodeCapacity;
-	  } else if (arguments.length === 1) {
-	    var nodeCapacity$1 = arguments[0];
-	    Assert.isTrue(nodeCapacity$1 > 1, 'Node capacity must be greater than 1');
-	    this._nodeCapacity = nodeCapacity$1;
-	  }
-	};
+	        function sha1_ft(t, b, c, d) {
+	          if (t < 20) {
+	            return b & c | ~b & d;
+	          }
 
-	var staticAccessors$23 = { IntersectsOp: { configurable: true },serialVersionUID: { configurable: true },DEFAULT_NODE_CAPACITY: { configurable: true } };
-	AbstractSTRtree.prototype.getNodeCapacity = function getNodeCapacity () {
-	  return this._nodeCapacity
-	};
-	AbstractSTRtree.prototype.lastNode = function lastNode (nodes) {
-	  return nodes.get(nodes.size() - 1)
-	};
-	AbstractSTRtree.prototype.size = function size () {
-	    var this$1 = this;
+	          if (t < 40) {
+	            return b ^ c ^ d;
+	          }
 
-	  if (arguments.length === 0) {
-	    if (this.isEmpty()) {
-	      return 0
-	    }
-	    this.build();
-	    return this.size(this._root)
-	  } else if (arguments.length === 1) {
-	    var node = arguments[0];
-	    var size = 0;
-	    for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-	      var childBoundable = i.next();
-	      if (childBoundable instanceof AbstractNode) {
-	        size += this$1.size(childBoundable);
-	      } else if (childBoundable instanceof ItemBoundable) {
-	        size += 1;
-	      }
-	    }
-	    return size
-	  }
-	};
-	AbstractSTRtree.prototype.removeItem = function removeItem (node, item) {
-	  var childToRemove = null;
-	  for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-	    var childBoundable = i.next();
-	    if (childBoundable instanceof ItemBoundable) {
-	      if (childBoundable.getItem() === item) { childToRemove = childBoundable; }
-	    }
-	  }
-	  if (childToRemove !== null) {
-	    node.getChildBoundables().remove(childToRemove);
-	    return true
-	  }
-	  return false
-	};
-	AbstractSTRtree.prototype.itemsTree = function itemsTree () {
-	    var this$1 = this;
-
-	  if (arguments.length === 0) {
-	    this.build();
-	    var valuesTree = this.itemsTree(this._root);
-	    if (valuesTree === null) { return new ArrayList() }
-	    return valuesTree
-	  } else if (arguments.length === 1) {
-	    var node = arguments[0];
-	    var valuesTreeForNode = new ArrayList();
-	    for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-	      var childBoundable = i.next();
-	      if (childBoundable instanceof AbstractNode) {
-	        var valuesTreeForChild = this$1.itemsTree(childBoundable);
-	        if (valuesTreeForChild !== null) { valuesTreeForNode.add(valuesTreeForChild); }
-	      } else if (childBoundable instanceof ItemBoundable) {
-	        valuesTreeForNode.add(childBoundable.getItem());
-	      } else {
-	        Assert.shouldNeverReachHere();
-	      }
-	    }
-	    if (valuesTreeForNode.size() <= 0) { return null }
-	    return valuesTreeForNode
-	  }
-	};
-	AbstractSTRtree.prototype.insert = function insert (bounds, item) {
-	  Assert.isTrue(!this._built, 'Cannot insert items into an STR packed R-tree after it has been built.');
-	  this._itemBoundables.add(new ItemBoundable(bounds, item));
-	};
-	AbstractSTRtree.prototype.boundablesAtLevel = function boundablesAtLevel () {
-	    var this$1 = this;
+	          if (t < 60) {
+	            return b & c | b & d | c & d;
+	          }
 
-	  if (arguments.length === 1) {
-	    var level = arguments[0];
-	    var boundables = new ArrayList();
-	    this.boundablesAtLevel(level, this._root, boundables);
-	    return boundables
-	  } else if (arguments.length === 3) {
-	    var level$1 = arguments[0];
-	    var top = arguments[1];
-	    var boundables$1 = arguments[2];
-	    Assert.isTrue(level$1 > -2);
-	    if (top.getLevel() === level$1) {
-	      boundables$1.add(top);
-	      return null
-	    }
-	    for (var i = top.getChildBoundables().iterator(); i.hasNext();) {
-	      var boundable = i.next();
-	      if (boundable instanceof AbstractNode) {
-	        this$1.boundablesAtLevel(level$1, boundable, boundables$1);
-	      } else {
-	        Assert.isTrue(boundable instanceof ItemBoundable);
-	        if (level$1 === -1) {
-	          boundables$1.add(boundable);
+	          return b ^ c ^ d;
 	        }
-	      }
-	    }
-	    return null
-	  }
-	};
-	AbstractSTRtree.prototype.query = function query () {
-	    var this$1 = this;
+	        /**
+	         * Determine the appropriate additive constant for the current iteration
+	         */
 
-	  if (arguments.length === 1) {
-	    var searchBounds = arguments[0];
-	    this.build();
-	    var matches = new ArrayList();
-	    if (this.isEmpty()) {
-	      return matches
-	    }
-	    if (this.getIntersectsOp().intersects(this._root.getBounds(), searchBounds)) {
-	      this.query(searchBounds, this._root, matches);
-	    }
-	    return matches
-	  } else if (arguments.length === 2) {
-	    var searchBounds$1 = arguments[0];
-	    var visitor = arguments[1];
-	    this.build();
-	    if (this.isEmpty()) {
-	      return null
-	    }
-	    if (this.getIntersectsOp().intersects(this._root.getBounds(), searchBounds$1)) {
-	      this.query(searchBounds$1, this._root, visitor);
-	    }
-	  } else if (arguments.length === 3) {
-	    if (hasInterface(arguments[2], ItemVisitor) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-	      var searchBounds$2 = arguments[0];
-	      var node = arguments[1];
-	      var visitor$1 = arguments[2];
-	      var childBoundables = node.getChildBoundables();
-	      for (var i = 0; i < childBoundables.size(); i++) {
-	        var childBoundable = childBoundables.get(i);
-	        if (!this$1.getIntersectsOp().intersects(childBoundable.getBounds(), searchBounds$2)) {
-	          continue
-	        }
-	        if (childBoundable instanceof AbstractNode) {
-	          this$1.query(searchBounds$2, childBoundable, visitor$1);
-	        } else if (childBoundable instanceof ItemBoundable) {
-	          visitor$1.visitItem(childBoundable.getItem());
-	        } else {
-	          Assert.shouldNeverReachHere();
-	        }
-	      }
-	    } else if (hasInterface(arguments[2], List) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-	      var searchBounds$3 = arguments[0];
-	      var node$1 = arguments[1];
-	      var matches$1 = arguments[2];
-	      var childBoundables$1 = node$1.getChildBoundables();
-	      for (var i$1 = 0; i$1 < childBoundables$1.size(); i$1++) {
-	        var childBoundable$1 = childBoundables$1.get(i$1);
-	        if (!this$1.getIntersectsOp().intersects(childBoundable$1.getBounds(), searchBounds$3)) {
-	          continue
-	        }
-	        if (childBoundable$1 instanceof AbstractNode) {
-	          this$1.query(searchBounds$3, childBoundable$1, matches$1);
-	        } else if (childBoundable$1 instanceof ItemBoundable) {
-	          matches$1.add(childBoundable$1.getItem());
-	        } else {
-	          Assert.shouldNeverReachHere();
-	        }
-	      }
-	    }
-	  }
-	};
-	AbstractSTRtree.prototype.build = function build () {
-	  if (this._built) { return null }
-	  this._root = this._itemBoundables.isEmpty() ? this.createNode(0) : this.createHigherLevels(this._itemBoundables, -1);
-	  this._itemBoundables = null;
-	  this._built = true;
-	};
-	AbstractSTRtree.prototype.getRoot = function getRoot () {
-	  this.build();
-	  return this._root
-	};
-	AbstractSTRtree.prototype.remove = function remove () {
-	    var this$1 = this;
 
-	  if (arguments.length === 2) {
-	    var searchBounds = arguments[0];
-	    var item = arguments[1];
-	    this.build();
-	    if (this.getIntersectsOp().intersects(this._root.getBounds(), searchBounds)) {
-	      return this.remove(searchBounds, this._root, item)
-	    }
-	    return false
-	  } else if (arguments.length === 3) {
-	    var searchBounds$1 = arguments[0];
-	    var node = arguments[1];
-	    var item$1 = arguments[2];
-	    var found = this.removeItem(node, item$1);
-	    if (found) { return true }
-	    var childToPrune = null;
-	    for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-	      var childBoundable = i.next();
-	      if (!this$1.getIntersectsOp().intersects(childBoundable.getBounds(), searchBounds$1)) {
-	        continue
-	      }
-	      if (childBoundable instanceof AbstractNode) {
-	        found = this$1.remove(searchBounds$1, childBoundable, item$1);
-	        if (found) {
-	          childToPrune = childBoundable;
-	          break
+	        function sha1_kt(t) {
+	          return t < 20 ? 1518500249 : t < 40 ? 1859775393 : t < 60 ? -1894007588 : -899497514;
 	        }
-	      }
-	    }
-	    if (childToPrune !== null) {
-	      if (childToPrune.getChildBoundables().isEmpty()) {
-	        node.getChildBoundables().remove(childToPrune);
-	      }
-	    }
-	    return found
-	  }
-	};
-	AbstractSTRtree.prototype.createHigherLevels = function createHigherLevels (boundablesOfALevel, level) {
-	  Assert.isTrue(!boundablesOfALevel.isEmpty());
-	  var parentBoundables = this.createParentBoundables(boundablesOfALevel, level + 1);
-	  if (parentBoundables.size() === 1) {
-	    return parentBoundables.get(0)
-	  }
-	  return this.createHigherLevels(parentBoundables, level + 1)
-	};
-	AbstractSTRtree.prototype.depth = function depth () {
-	    var this$1 = this;
+	      },
 
-	  if (arguments.length === 0) {
-	    if (this.isEmpty()) {
-	      return 0
-	    }
-	    this.build();
-	    return this.depth(this._root)
-	  } else if (arguments.length === 1) {
-	    var node = arguments[0];
-	    var maxChildDepth = 0;
-	    for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-	      var childBoundable = i.next();
-	      if (childBoundable instanceof AbstractNode) {
-	        var childDepth = this$1.depth(childBoundable);
-	        if (childDepth > maxChildDepth) { maxChildDepth = childDepth; }
-	      }
-	    }
-	    return maxChildDepth + 1
-	  }
-	};
-	AbstractSTRtree.prototype.createParentBoundables = function createParentBoundables (childBoundables, newLevel) {
-	    var this$1 = this;
-
-	  Assert.isTrue(!childBoundables.isEmpty());
-	  var parentBoundables = new ArrayList();
-	  parentBoundables.add(this.createNode(newLevel));
-	  var sortedChildBoundables = new ArrayList(childBoundables);
-	  Collections.sort(sortedChildBoundables, this.getComparator());
-	  for (var i = sortedChildBoundables.iterator(); i.hasNext();) {
-	    var childBoundable = i.next();
-	    if (this$1.lastNode(parentBoundables).getChildBoundables().size() === this$1.getNodeCapacity()) {
-	      parentBoundables.add(this$1.createNode(newLevel));
-	    }
-	    this$1.lastNode(parentBoundables).addChildBoundable(childBoundable);
-	  }
-	  return parentBoundables
-	};
-	AbstractSTRtree.prototype.isEmpty = function isEmpty () {
-	  if (!this._built) { return this._itemBoundables.isEmpty() }
-	  return this._root.isEmpty()
-	};
-	AbstractSTRtree.prototype.interfaces_ = function interfaces_ () {
-	  return [Serializable]
-	};
-	AbstractSTRtree.prototype.getClass = function getClass () {
-	  return AbstractSTRtree
-	};
-	AbstractSTRtree.compareDoubles = function compareDoubles (a, b) {
-	  return a > b ? 1 : a < b ? -1 : 0
-	};
-	staticAccessors$23.IntersectsOp.get = function () { return IntersectsOp };
-	staticAccessors$23.serialVersionUID.get = function () { return -3886435814360241337 };
-	staticAccessors$23.DEFAULT_NODE_CAPACITY.get = function () { return 10 };
+	      /**
+	       * @class Hashes.SHA256
+	       * @param {config}
+	       *
+	       * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined in FIPS 180-2
+	       * Version 2.2 Copyright Angel Marin, Paul Johnston 2000 - 2009.
+	       * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+	       * See http://pajhome.org.uk/crypt/md5 for details.
+	       * Also http://anmar.eu.org/projects/jssha2/
+	       */
+	      SHA256: function SHA256(options) {
+	        /**
+	         * Private properties configuration variables. You may need to tweak these to be compatible with
+	         * the server-side, but the defaults work in most cases.
+	         * @see this.setUpperCase() method
+	         * @see this.setPad() method
+	         */
+	        options && typeof options.uppercase === 'boolean' ? options.uppercase : false;
+	            var // hexadecimal output case format. false - lowercase; true - uppercase  */
+	        b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
+
+	        /* base-64 pad character. Default '=' for strict RFC compliance   */
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-	Object.defineProperties( AbstractSTRtree, staticAccessors$23 );
+	        /* enable/disable utf8 encoding */
+	        sha256_K;
+	        /* privileged (public) methods */
 
-	var IntersectsOp = function IntersectsOp () {};
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s, utf8));
+	        };
 
-	var ItemDistance = function ItemDistance () {};
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s, utf8), b64pad);
+	        };
 
-	ItemDistance.prototype.distance = function distance (item1, item2) {};
-	ItemDistance.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	ItemDistance.prototype.getClass = function getClass () {
-	  return ItemDistance
-	};
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s, utf8), e);
+	        };
 
-	var STRtree = (function (AbstractSTRtree$$1) {
-	  function STRtree (nodeCapacity) {
-	    nodeCapacity = nodeCapacity || STRtree.DEFAULT_NODE_CAPACITY;
-	    AbstractSTRtree$$1.call(this, nodeCapacity);
-	  }
-
-	  if ( AbstractSTRtree$$1 ) { STRtree.__proto__ = AbstractSTRtree$$1; }
-	  STRtree.prototype = Object.create( AbstractSTRtree$$1 && AbstractSTRtree$$1.prototype );
-	  STRtree.prototype.constructor = STRtree;
-
-	  var staticAccessors = { STRtreeNode: { configurable: true },serialVersionUID: { configurable: true },xComparator: { configurable: true },yComparator: { configurable: true },intersectsOp: { configurable: true },DEFAULT_NODE_CAPACITY: { configurable: true } };
-	  STRtree.prototype.createParentBoundablesFromVerticalSlices = function createParentBoundablesFromVerticalSlices (verticalSlices, newLevel) {
-	    var this$1 = this;
-
-	    Assert.isTrue(verticalSlices.length > 0);
-	    var parentBoundables = new ArrayList();
-	    for (var i = 0; i < verticalSlices.length; i++) {
-	      parentBoundables.addAll(this$1.createParentBoundablesFromVerticalSlice(verticalSlices[i], newLevel));
-	    }
-	    return parentBoundables
-	  };
-	  STRtree.prototype.createNode = function createNode (level) {
-	    return new STRtreeNode(level)
-	  };
-	  STRtree.prototype.size = function size () {
-	    if (arguments.length === 0) {
-	      return AbstractSTRtree$$1.prototype.size.call(this)
-	    } else { return AbstractSTRtree$$1.prototype.size.apply(this, arguments) }
-	  };
-	  STRtree.prototype.insert = function insert () {
-	    if (arguments.length === 2) {
-	      var itemEnv = arguments[0];
-	      var item = arguments[1];
-	      if (itemEnv.isNull()) {
-	        return null
-	      }
-	      AbstractSTRtree$$1.prototype.insert.call(this, itemEnv, item);
-	    } else { return AbstractSTRtree$$1.prototype.insert.apply(this, arguments) }
-	  };
-	  STRtree.prototype.getIntersectsOp = function getIntersectsOp () {
-	    return STRtree.intersectsOp
-	  };
-	  STRtree.prototype.verticalSlices = function verticalSlices (childBoundables, sliceCount) {
-	    var sliceCapacity = Math.trunc(Math.ceil(childBoundables.size() / sliceCount));
-	    var slices = new Array(sliceCount).fill(null);
-	    var i = childBoundables.iterator();
-	    for (var j = 0; j < sliceCount; j++) {
-	      slices[j] = new ArrayList();
-	      var boundablesAddedToSlice = 0;
-	      while (i.hasNext() && boundablesAddedToSlice < sliceCapacity) {
-	        var childBoundable = i.next();
-	        slices[j].add(childBoundable);
-	        boundablesAddedToSlice++;
-	      }
-	    }
-	    return slices
-	  };
-	  STRtree.prototype.query = function query () {
-	    if (arguments.length === 1) {
-	      var searchEnv = arguments[0];
-	      return AbstractSTRtree$$1.prototype.query.call(this, searchEnv)
-	    } else if (arguments.length === 2) {
-	      var searchEnv$1 = arguments[0];
-	      var visitor = arguments[1];
-	      AbstractSTRtree$$1.prototype.query.call(this, searchEnv$1, visitor);
-	    } else if (arguments.length === 3) {
-	      if (hasInterface(arguments[2], ItemVisitor) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-	        var searchBounds = arguments[0];
-	        var node = arguments[1];
-	        var visitor$1 = arguments[2];
-	        AbstractSTRtree$$1.prototype.query.call(this, searchBounds, node, visitor$1);
-	      } else if (hasInterface(arguments[2], List) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-	        var searchBounds$1 = arguments[0];
-	        var node$1 = arguments[1];
-	        var matches = arguments[2];
-	        AbstractSTRtree$$1.prototype.query.call(this, searchBounds$1, node$1, matches);
-	      }
-	    }
-	  };
-	  STRtree.prototype.getComparator = function getComparator () {
-	    return STRtree.yComparator
-	  };
-	  STRtree.prototype.createParentBoundablesFromVerticalSlice = function createParentBoundablesFromVerticalSlice (childBoundables, newLevel) {
-	    return AbstractSTRtree$$1.prototype.createParentBoundables.call(this, childBoundables, newLevel)
-	  };
-	  STRtree.prototype.remove = function remove () {
-	    if (arguments.length === 2) {
-	      var itemEnv = arguments[0];
-	      var item = arguments[1];
-	      return AbstractSTRtree$$1.prototype.remove.call(this, itemEnv, item)
-	    } else { return AbstractSTRtree$$1.prototype.remove.apply(this, arguments) }
-	  };
-	  STRtree.prototype.depth = function depth () {
-	    if (arguments.length === 0) {
-	      return AbstractSTRtree$$1.prototype.depth.call(this)
-	    } else { return AbstractSTRtree$$1.prototype.depth.apply(this, arguments) }
-	  };
-	  STRtree.prototype.createParentBoundables = function createParentBoundables (childBoundables, newLevel) {
-	    Assert.isTrue(!childBoundables.isEmpty());
-	    var minLeafCount = Math.trunc(Math.ceil(childBoundables.size() / this.getNodeCapacity()));
-	    var sortedChildBoundables = new ArrayList(childBoundables);
-	    Collections.sort(sortedChildBoundables, STRtree.xComparator);
-	    var verticalSlices = this.verticalSlices(sortedChildBoundables, Math.trunc(Math.ceil(Math.sqrt(minLeafCount))));
-	    return this.createParentBoundablesFromVerticalSlices(verticalSlices, newLevel)
-	  };
-	  STRtree.prototype.nearestNeighbour = function nearestNeighbour () {
-	    if (arguments.length === 1) {
-	      if (hasInterface(arguments[0], ItemDistance)) {
-	        var itemDist = arguments[0];
-	        var bp = new BoundablePair(this.getRoot(), this.getRoot(), itemDist);
-	        return this.nearestNeighbour(bp)
-	      } else if (arguments[0] instanceof BoundablePair) {
-	        var initBndPair = arguments[0];
-	        return this.nearestNeighbour(initBndPair, Double.POSITIVE_INFINITY)
-	      }
-	    } else if (arguments.length === 2) {
-	      if (arguments[0] instanceof STRtree && hasInterface(arguments[1], ItemDistance)) {
-	        var tree = arguments[0];
-	        var itemDist$1 = arguments[1];
-	        var bp$1 = new BoundablePair(this.getRoot(), tree.getRoot(), itemDist$1);
-	        return this.nearestNeighbour(bp$1)
-	      } else if (arguments[0] instanceof BoundablePair && typeof arguments[1] === 'number') {
-	        var initBndPair$1 = arguments[0];
-	        var maxDistance = arguments[1];
-	        var distanceLowerBound = maxDistance;
-	        var minPair = null;
-	        var priQ = new PriorityQueue();
-	        priQ.add(initBndPair$1);
-	        while (!priQ.isEmpty() && distanceLowerBound > 0.0) {
-	          var bndPair = priQ.poll();
-	          var currentDistance = bndPair.getDistance();
-	          if (currentDistance >= distanceLowerBound) { break }
-	          if (bndPair.isLeaves()) {
-	            distanceLowerBound = currentDistance;
-	            minPair = bndPair;
-	          } else {
-	            bndPair.expandToQueue(priQ, distanceLowerBound);
-	          }
-	        }
-	        return [minPair.getBoundable(0).getItem(), minPair.getBoundable(1).getItem()]
-	      }
-	    } else if (arguments.length === 3) {
-	      var env = arguments[0];
-	      var item = arguments[1];
-	      var itemDist$2 = arguments[2];
-	      var bnd = new ItemBoundable(env, item);
-	      var bp$2 = new BoundablePair(this.getRoot(), bnd, itemDist$2);
-	      return this.nearestNeighbour(bp$2)[0]
-	    }
-	  };
-	  STRtree.prototype.interfaces_ = function interfaces_ () {
-	    return [SpatialIndex, Serializable]
-	  };
-	  STRtree.prototype.getClass = function getClass () {
-	    return STRtree
-	  };
-	  STRtree.centreX = function centreX (e) {
-	    return STRtree.avg(e.getMinX(), e.getMaxX())
-	  };
-	  STRtree.avg = function avg (a, b) {
-	    return (a + b) / 2
-	  };
-	  STRtree.centreY = function centreY (e) {
-	    return STRtree.avg(e.getMinY(), e.getMaxY())
-	  };
-	  staticAccessors.STRtreeNode.get = function () { return STRtreeNode };
-	  staticAccessors.serialVersionUID.get = function () { return 259274702368956900 };
-	  staticAccessors.xComparator.get = function () {
-	    return {
-	      interfaces_: function () {
-	        return [Comparator]
-	      },
-	      compare: function (o1, o2) {
-	        return AbstractSTRtree$$1.compareDoubles(STRtree.centreX(o1.getBounds()), STRtree.centreX(o2.getBounds()))
-	      }
-	    }
-	  };
-	  staticAccessors.yComparator.get = function () {
-	    return {
-	      interfaces_: function () {
-	        return [Comparator]
-	      },
-	      compare: function (o1, o2) {
-	        return AbstractSTRtree$$1.compareDoubles(STRtree.centreY(o1.getBounds()), STRtree.centreY(o2.getBounds()))
-	      }
-	    }
-	  };
-	  staticAccessors.intersectsOp.get = function () {
-	    return {
-	      interfaces_: function () {
-	        return [AbstractSTRtree$$1.IntersectsOp]
-	      },
-	      intersects: function (aBounds, bBounds) {
-	        return aBounds.intersects(bBounds)
-	      }
-	    }
-	  };
-	  staticAccessors.DEFAULT_NODE_CAPACITY.get = function () { return 10 };
+	        this.raw = function (s) {
+	          return rstr(s, utf8);
+	        };
 
-	  Object.defineProperties( STRtree, staticAccessors );
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	  return STRtree;
-	}(AbstractSTRtree));
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	var STRtreeNode = (function (AbstractNode$$1) {
-	  function STRtreeNode () {
-	    var level = arguments[0];
-	    AbstractNode$$1.call(this, level);
-	  }
+	        this.any_hmac = function (k, d, e) {
+	          return rstr2any(rstr_hmac(k, d), e);
+	        };
+	        /**
+	         * Perform a simple self-test to see if the VM is working
+	         * @return {String} Hexadecimal hash sample
+	         * @public
+	         */
 
-	  if ( AbstractNode$$1 ) { STRtreeNode.__proto__ = AbstractNode$$1; }
-	  STRtreeNode.prototype = Object.create( AbstractNode$$1 && AbstractNode$$1.prototype );
-	  STRtreeNode.prototype.constructor = STRtreeNode;
-	  STRtreeNode.prototype.computeBounds = function computeBounds () {
-	    var bounds = null;
-	    for (var i = this.getChildBoundables().iterator(); i.hasNext();) {
-	      var childBoundable = i.next();
-	      if (bounds === null) {
-	        bounds = new Envelope(childBoundable.getBounds());
-	      } else {
-	        bounds.expandToInclude(childBoundable.getBounds());
-	      }
-	    }
-	    return bounds
-	  };
-	  STRtreeNode.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  STRtreeNode.prototype.getClass = function getClass () {
-	    return STRtreeNode
-	  };
 
-	  return STRtreeNode;
-	}(AbstractNode));
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	var SegmentPointComparator = function SegmentPointComparator () {};
 
-	SegmentPointComparator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SegmentPointComparator.prototype.getClass = function getClass () {
-	  return SegmentPointComparator
-	};
-	SegmentPointComparator.relativeSign = function relativeSign (x0, x1) {
-	  if (x0 < x1) { return -1 }
-	  if (x0 > x1) { return 1 }
-	  return 0
-	};
-	SegmentPointComparator.compare = function compare (octant, p0, p1) {
-	  if (p0.equals2D(p1)) { return 0 }
-	  var xSign = SegmentPointComparator.relativeSign(p0.x, p1.x);
-	  var ySign = SegmentPointComparator.relativeSign(p0.y, p1.y);
-	  switch (octant) {
-	    case 0:
-	      return SegmentPointComparator.compareValue(xSign, ySign)
-	    case 1:
-	      return SegmentPointComparator.compareValue(ySign, xSign)
-	    case 2:
-	      return SegmentPointComparator.compareValue(ySign, -xSign)
-	    case 3:
-	      return SegmentPointComparator.compareValue(-xSign, ySign)
-	    case 4:
-	      return SegmentPointComparator.compareValue(-xSign, -ySign)
-	    case 5:
-	      return SegmentPointComparator.compareValue(-ySign, -xSign)
-	    case 6:
-	      return SegmentPointComparator.compareValue(-ySign, xSign)
-	    case 7:
-	      return SegmentPointComparator.compareValue(xSign, -ySign)
-	  }
-	  Assert.shouldNeverReachHere('invalid octant value');
-	  return 0
-	};
-	SegmentPointComparator.compareValue = function compareValue (compareSign0, compareSign1) {
-	  if (compareSign0 < 0) { return -1 }
-	  if (compareSign0 > 0) { return 1 }
-	  if (compareSign1 < 0) { return -1 }
-	  if (compareSign1 > 0) { return 1 }
-	  return 0
-	};
+	        this.setUpperCase = function (a) {
 
-	var SegmentNode = function SegmentNode () {
-	  this._segString = null;
-	  this.coord = null;
-	  this.segmentIndex = null;
-	  this._segmentOctant = null;
-	  this._isInterior = null;
-	  var segString = arguments[0];
-	  var coord = arguments[1];
-	  var segmentIndex = arguments[2];
-	  var segmentOctant = arguments[3];
-	  this._segString = segString;
-	  this.coord = new Coordinate(coord);
-	  this.segmentIndex = segmentIndex;
-	  this._segmentOctant = segmentOctant;
-	  this._isInterior = !coord.equals2D(segString.getCoordinate(segmentIndex));
-	};
-	SegmentNode.prototype.getCoordinate = function getCoordinate () {
-	  return this.coord
-	};
-	SegmentNode.prototype.print = function print (out) {
-	  out.print(this.coord);
-	  out.print(' seg # = ' + this.segmentIndex);
-	};
-	SegmentNode.prototype.compareTo = function compareTo (obj) {
-	  var other = obj;
-	  if (this.segmentIndex < other.segmentIndex) { return -1 }
-	  if (this.segmentIndex > other.segmentIndex) { return 1 }
-	  if (this.coord.equals2D(other.coord)) { return 0 }
-	  return SegmentPointComparator.compare(this._segmentOctant, this.coord, other.coord)
-	};
-	SegmentNode.prototype.isEndPoint = function isEndPoint (maxSegmentIndex) {
-	  if (this.segmentIndex === 0 && !this._isInterior) { return true }
-	  if (this.segmentIndex === maxSegmentIndex) { return true }
-	  return false
-	};
-	SegmentNode.prototype.isInterior = function isInterior () {
-	  return this._isInterior
-	};
-	SegmentNode.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	SegmentNode.prototype.getClass = function getClass () {
-	  return SegmentNode
-	};
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	// import Iterator from '../../../../java/util/Iterator'
-	var SegmentNodeList = function SegmentNodeList () {
-	  this._nodeMap = new TreeMap();
-	  this._edge = null;
-	  var edge = arguments[0];
-	  this._edge = edge;
-	};
-	SegmentNodeList.prototype.getSplitCoordinates = function getSplitCoordinates () {
-	    var this$1 = this;
-
-	  var coordList = new CoordinateList();
-	  this.addEndpoints();
-	  var it = this.iterator();
-	  var eiPrev = it.next();
-	  while (it.hasNext()) {
-	    var ei = it.next();
-	    this$1.addEdgeCoordinates(eiPrev, ei, coordList);
-	    eiPrev = ei;
-	  }
-	  return coordList.toCoordinateArray()
-	};
-	SegmentNodeList.prototype.addCollapsedNodes = function addCollapsedNodes () {
-	    var this$1 = this;
 
-	  var collapsedVertexIndexes = new ArrayList();
-	  this.findCollapsesFromInsertedNodes(collapsedVertexIndexes);
-	  this.findCollapsesFromExistingVertices(collapsedVertexIndexes);
-	  for (var it = collapsedVertexIndexes.iterator(); it.hasNext();) {
-	    var vertexIndex = it.next().intValue();
-	    this$1.add(this$1._edge.getCoordinate(vertexIndex), vertexIndex);
-	  }
-	};
-	SegmentNodeList.prototype.print = function print (out) {
-	  out.println('Intersections:');
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var ei = it.next();
-	    ei.print(out);
-	  }
-	};
-	SegmentNodeList.prototype.findCollapsesFromExistingVertices = function findCollapsesFromExistingVertices (collapsedVertexIndexes) {
-	    var this$1 = this;
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	  for (var i = 0; i < this._edge.size() - 2; i++) {
-	    var p0 = this$1._edge.getCoordinate(i);
-	    // const p1 = this._edge.getCoordinate(i + 1)
-	    var p2 = this$1._edge.getCoordinate(i + 2);
-	    if (p0.equals2D(p2)) {
-	      collapsedVertexIndexes.add(new Integer(i + 1));
-	    }
-	  }
-	};
-	SegmentNodeList.prototype.addEdgeCoordinates = function addEdgeCoordinates (ei0, ei1, coordList) {
-	    var this$1 = this;
-
-	  // let npts = ei1.segmentIndex - ei0.segmentIndex + 2
-	  var lastSegStartPt = this._edge.getCoordinate(ei1.segmentIndex);
-	  var useIntPt1 = ei1.isInterior() || !ei1.coord.equals2D(lastSegStartPt);
-	  // if (!useIntPt1) {
-	  // npts--
-	  // }
-	  // const ipt = 0
-	  coordList.add(new Coordinate(ei0.coord), false);
-	  for (var i = ei0.segmentIndex + 1; i <= ei1.segmentIndex; i++) {
-	    coordList.add(this$1._edge.getCoordinate(i));
-	  }
-	  if (useIntPt1) {
-	    coordList.add(new Coordinate(ei1.coord));
-	  }
-	};
-	SegmentNodeList.prototype.iterator = function iterator () {
-	  return this._nodeMap.values().iterator()
-	};
-	SegmentNodeList.prototype.addSplitEdges = function addSplitEdges (edgeList) {
-	    var this$1 = this;
-
-	  this.addEndpoints();
-	  this.addCollapsedNodes();
-	  var it = this.iterator();
-	  var eiPrev = it.next();
-	  while (it.hasNext()) {
-	    var ei = it.next();
-	    var newEdge = this$1.createSplitEdge(eiPrev, ei);
-	    edgeList.add(newEdge);
-	    eiPrev = ei;
-	  }
-	};
-	SegmentNodeList.prototype.findCollapseIndex = function findCollapseIndex (ei0, ei1, collapsedVertexIndex) {
-	  if (!ei0.coord.equals2D(ei1.coord)) { return false }
-	  var numVerticesBetween = ei1.segmentIndex - ei0.segmentIndex;
-	  if (!ei1.isInterior()) {
-	    numVerticesBetween--;
-	  }
-	  if (numVerticesBetween === 1) {
-	    collapsedVertexIndex[0] = ei0.segmentIndex + 1;
-	    return true
-	  }
-	  return false
-	};
-	SegmentNodeList.prototype.findCollapsesFromInsertedNodes = function findCollapsesFromInsertedNodes (collapsedVertexIndexes) {
-	    var this$1 = this;
-
-	  var collapsedVertexIndex = new Array(1).fill(null);
-	  var it = this.iterator();
-	  var eiPrev = it.next();
-	  while (it.hasNext()) {
-	    var ei = it.next();
-	    var isCollapsed = this$1.findCollapseIndex(eiPrev, ei, collapsedVertexIndex);
-	    if (isCollapsed) { collapsedVertexIndexes.add(new Integer(collapsedVertexIndex[0])); }
-	    eiPrev = ei;
-	  }
-	};
-	SegmentNodeList.prototype.getEdge = function getEdge () {
-	  return this._edge
-	};
-	SegmentNodeList.prototype.addEndpoints = function addEndpoints () {
-	  var maxSegIndex = this._edge.size() - 1;
-	  this.add(this._edge.getCoordinate(0), 0);
-	  this.add(this._edge.getCoordinate(maxSegIndex), maxSegIndex);
-	};
-	SegmentNodeList.prototype.createSplitEdge = function createSplitEdge (ei0, ei1) {
-	    var this$1 = this;
-
-	  var npts = ei1.segmentIndex - ei0.segmentIndex + 2;
-	  var lastSegStartPt = this._edge.getCoordinate(ei1.segmentIndex);
-	  var useIntPt1 = ei1.isInterior() || !ei1.coord.equals2D(lastSegStartPt);
-	  if (!useIntPt1) {
-	    npts--;
-	  }
-	  var pts = new Array(npts).fill(null);
-	  var ipt = 0;
-	  pts[ipt++] = new Coordinate(ei0.coord);
-	  for (var i = ei0.segmentIndex + 1; i <= ei1.segmentIndex; i++) {
-	    pts[ipt++] = this$1._edge.getCoordinate(i);
-	  }
-	  if (useIntPt1) { pts[ipt] = new Coordinate(ei1.coord); }
-	  return new NodedSegmentString(pts, this._edge.getData())
-	};
-	SegmentNodeList.prototype.add = function add (intPt, segmentIndex) {
-	  var eiNew = new SegmentNode(this._edge, intPt, segmentIndex, this._edge.getSegmentOctant(segmentIndex));
-	  var ei = this._nodeMap.get(eiNew);
-	  if (ei !== null) {
-	    Assert.isTrue(ei.coord.equals2D(intPt), 'Found equal nodes with different coordinates');
-	    return ei
-	  }
-	  this._nodeMap.put(eiNew, eiNew);
-	  return eiNew
-	};
-	SegmentNodeList.prototype.checkSplitEdgesCorrectness = function checkSplitEdgesCorrectness (splitEdges) {
-	  var edgePts = this._edge.getCoordinates();
-	  var split0 = splitEdges.get(0);
-	  var pt0 = split0.getCoordinate(0);
-	  if (!pt0.equals2D(edgePts[0])) { throw new RuntimeException('bad split edge start point at ' + pt0) }
-	  var splitn = splitEdges.get(splitEdges.size() - 1);
-	  var splitnPts = splitn.getCoordinates();
-	  var ptn = splitnPts[splitnPts.length - 1];
-	  if (!ptn.equals2D(edgePts[edgePts.length - 1])) { throw new RuntimeException('bad split edge end point at ' + ptn) }
-	};
-	SegmentNodeList.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SegmentNodeList.prototype.getClass = function getClass () {
-	  return SegmentNodeList
-	};
 
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
+	          return this;
+	        }; // private methods
 
-	// class NodeVertexIterator {
-	//   constructor () {
-	//     this._nodeList = null
-	//     this._edge = null
-	//     this._nodeIt = null
-	//     this._currNode = null
-	//     this._nextNode = null
-	//     this._currSegIndex = 0
-	//     let nodeList = arguments[0]
-	//     this._nodeList = nodeList
-	//     this._edge = nodeList.getEdge()
-	//     this._nodeIt = nodeList.iterator()
-	//     this.readNextNode()
-	//   }
-	//   next () {
-	//     if (this._currNode === null) {
-	//       this._currNode = this._nextNode
-	//       this._currSegIndex = this._currNode.segmentIndex
-	//       this.readNextNode()
-	//       return this._currNode
-	//     }
-	//     if (this._nextNode === null) return null
-	//     if (this._nextNode.segmentIndex === this._currNode.segmentIndex) {
-	//       this._currNode = this._nextNode
-	//       this._currSegIndex = this._currNode.segmentIndex
-	//       this.readNextNode()
-	//       return this._currNode
-	//     }
-	//     if (this._nextNode.segmentIndex > this._currNode.segmentIndex) {}
-	//     return null
-	//   }
-	//   remove () {
-	//     // throw new UnsupportedOperationException(this.getClass().getName())
-	//   }
-	//   hasNext () {
-	//     if (this._nextNode === null) return false
-	//     return true
-	//   }
-	//   readNextNode () {
-	//     if (this._nodeIt.hasNext()) this._nextNode = this._nodeIt.next(); else this._nextNode = null
-	//   }
-	//   interfaces_ () {
-	//     return [Iterator]
-	//   }
-	//   getClass () {
-	//     return NodeVertexIterator
-	//   }
-	// }
+	        /**
+	         * Calculate the SHA-512 of a raw string
+	         */
 
-	var Octant = function Octant () {};
 
-	Octant.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Octant.prototype.getClass = function getClass () {
-	  return Octant
-	};
-	Octant.octant = function octant () {
-	  if (typeof arguments[0] === 'number' && typeof arguments[1] === 'number') {
-	    var dx = arguments[0];
-	    var dy = arguments[1];
-	    if (dx === 0.0 && dy === 0.0) { throw new IllegalArgumentException('Cannot compute the octant for point ( ' + dx + ', ' + dy + ' )') }
-	    var adx = Math.abs(dx);
-	    var ady = Math.abs(dy);
-	    if (dx >= 0) {
-	      if (dy >= 0) {
-	        if (adx >= ady) { return 0; } else { return 1 }
-	      } else {
-	        if (adx >= ady) { return 7; } else { return 6 }
-	      }
-	    } else {
-	      if (dy >= 0) {
-	        if (adx >= ady) { return 3; } else { return 2 }
-	      } else {
-	        if (adx >= ady) { return 4; } else { return 5 }
-	      }
-	    }
-	  } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Coordinate) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    var dx$1 = p1.x - p0.x;
-	    var dy$1 = p1.y - p0.y;
-	    if (dx$1 === 0.0 && dy$1 === 0.0) { throw new IllegalArgumentException('Cannot compute the octant for two identical points ' + p0) }
-	    return Octant.octant(dx$1, dy$1)
-	  }
-	};
+	        function rstr(s, utf8) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binb2rstr(binb(rstr2binb(s), s.length * 8));
+	        }
+	        /**
+	         * Calculate the HMAC-sha256 of a key and some data (raw strings)
+	         */
 
-	var SegmentString = function SegmentString () {};
 
-	SegmentString.prototype.getCoordinates = function getCoordinates () {};
-	SegmentString.prototype.size = function size () {};
-	SegmentString.prototype.getCoordinate = function getCoordinate (i) {};
-	SegmentString.prototype.isClosed = function isClosed () {};
-	SegmentString.prototype.setData = function setData (data) {};
-	SegmentString.prototype.getData = function getData () {};
-	SegmentString.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SegmentString.prototype.getClass = function getClass () {
-	  return SegmentString
-	};
+	        function rstr_hmac(key, data) {
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          var hash,
+	              i = 0,
+	              bkey = rstr2binb(key),
+	              ipad = Array(16),
+	              opad = Array(16);
 
-	var NodableSegmentString = function NodableSegmentString () {};
+	          if (bkey.length > 16) {
+	            bkey = binb(bkey, key.length * 8);
+	          }
 
-	NodableSegmentString.prototype.addIntersection = function addIntersection (intPt, segmentIndex) {};
-	NodableSegmentString.prototype.interfaces_ = function interfaces_ () {
-	  return [SegmentString]
-	};
-	NodableSegmentString.prototype.getClass = function getClass () {
-	  return NodableSegmentString
-	};
+	          for (; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	var NodedSegmentString = function NodedSegmentString () {
-	  this._nodeList = new SegmentNodeList(this);
-	  this._pts = null;
-	  this._data = null;
-	  var pts = arguments[0];
-	  var data = arguments[1];
-	  this._pts = pts;
-	  this._data = data;
-	};
-	NodedSegmentString.prototype.getCoordinates = function getCoordinates () {
-	  return this._pts
-	};
-	NodedSegmentString.prototype.size = function size () {
-	  return this._pts.length
-	};
-	NodedSegmentString.prototype.getCoordinate = function getCoordinate (i) {
-	  return this._pts[i]
-	};
-	NodedSegmentString.prototype.isClosed = function isClosed () {
-	  return this._pts[0].equals(this._pts[this._pts.length - 1])
-	};
-	NodedSegmentString.prototype.getSegmentOctant = function getSegmentOctant (index) {
-	  if (index === this._pts.length - 1) { return -1 }
-	  return this.safeOctant(this.getCoordinate(index), this.getCoordinate(index + 1))
-	};
-	NodedSegmentString.prototype.setData = function setData (data) {
-	  this._data = data;
-	};
-	NodedSegmentString.prototype.safeOctant = function safeOctant (p0, p1) {
-	  if (p0.equals2D(p1)) { return 0 }
-	  return Octant.octant(p0, p1)
-	};
-	NodedSegmentString.prototype.getData = function getData () {
-	  return this._data
-	};
-	NodedSegmentString.prototype.addIntersection = function addIntersection () {
-	  if (arguments.length === 2) {
-	    var intPt$1 = arguments[0];
-	    var segmentIndex = arguments[1];
-	    this.addIntersectionNode(intPt$1, segmentIndex);
-	  } else if (arguments.length === 4) {
-	    var li = arguments[0];
-	    var segmentIndex$1 = arguments[1];
-	    // const geomIndex = arguments[2]
-	    var intIndex = arguments[3];
-	    var intPt = new Coordinate(li.getIntersection(intIndex));
-	    this.addIntersection(intPt, segmentIndex$1);
-	  }
-	};
-	NodedSegmentString.prototype.toString = function toString () {
-	  return WKTWriter.toLineString(new CoordinateArraySequence(this._pts))
-	};
-	NodedSegmentString.prototype.getNodeList = function getNodeList () {
-	  return this._nodeList
-	};
-	NodedSegmentString.prototype.addIntersectionNode = function addIntersectionNode (intPt, segmentIndex) {
-	  var normalizedSegmentIndex = segmentIndex;
-	  var nextSegIndex = normalizedSegmentIndex + 1;
-	  if (nextSegIndex < this._pts.length) {
-	    var nextPt = this._pts[nextSegIndex];
-	    if (intPt.equals2D(nextPt)) {
-	      normalizedSegmentIndex = nextSegIndex;
-	    }
-	  }
-	  var ei = this._nodeList.add(intPt, normalizedSegmentIndex);
-	  return ei
-	};
-	NodedSegmentString.prototype.addIntersections = function addIntersections (li, segmentIndex, geomIndex) {
-	    var this$1 = this;
+	          hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
+	          return binb2rstr(binb(opad.concat(hash), 512 + 256));
+	        }
+	        /*
+	         * Main sha256 function, with its support functions
+	         */
 
-	  for (var i = 0; i < li.getIntersectionNum(); i++) {
-	    this$1.addIntersection(li, segmentIndex, geomIndex, i);
-	  }
-	};
-	NodedSegmentString.prototype.interfaces_ = function interfaces_ () {
-	  return [NodableSegmentString]
-	};
-	NodedSegmentString.prototype.getClass = function getClass () {
-	  return NodedSegmentString
-	};
-	NodedSegmentString.getNodedSubstrings = function getNodedSubstrings () {
-	  if (arguments.length === 1) {
-	    var segStrings = arguments[0];
-	    var resultEdgelist = new ArrayList();
-	    NodedSegmentString.getNodedSubstrings(segStrings, resultEdgelist);
-	    return resultEdgelist
-	  } else if (arguments.length === 2) {
-	    var segStrings$1 = arguments[0];
-	    var resultEdgelist$1 = arguments[1];
-	    for (var i = segStrings$1.iterator(); i.hasNext();) {
-	      var ss = i.next();
-	      ss.getNodeList().addSplitEdges(resultEdgelist$1);
-	    }
-	  }
-	};
 
-	var LineSegment = function LineSegment () {
-	  this.p0 = null;
-	  this.p1 = null;
-	  if (arguments.length === 0) {
-	    this.p0 = new Coordinate();
-	    this.p1 = new Coordinate();
-	  } else if (arguments.length === 1) {
-	    var ls = arguments[0];
-	    this.p0 = new Coordinate(ls.p0);
-	    this.p1 = new Coordinate(ls.p1);
-	  } else if (arguments.length === 2) {
-	    this.p0 = arguments[0];
-	    this.p1 = arguments[1];
-	  } else if (arguments.length === 4) {
-	    var x0 = arguments[0];
-	    var y0 = arguments[1];
-	    var x1 = arguments[2];
-	    var y1 = arguments[3];
-	    this.p0 = new Coordinate(x0, y0);
-	    this.p1 = new Coordinate(x1, y1);
-	  }
-	};
+	        function sha256_S(X, n) {
+	          return X >>> n | X << 32 - n;
+	        }
 
-	var staticAccessors$24 = { serialVersionUID: { configurable: true } };
-	LineSegment.prototype.minX = function minX () {
-	  return Math.min(this.p0.x, this.p1.x)
-	};
-	LineSegment.prototype.orientationIndex = function orientationIndex () {
-	  if (arguments[0] instanceof LineSegment) {
-	    var seg = arguments[0];
-	    var orient0 = CGAlgorithms.orientationIndex(this.p0, this.p1, seg.p0);
-	    var orient1 = CGAlgorithms.orientationIndex(this.p0, this.p1, seg.p1);
-	    if (orient0 >= 0 && orient1 >= 0) { return Math.max(orient0, orient1) }
-	    if (orient0 <= 0 && orient1 <= 0) { return Math.max(orient0, orient1) }
-	    return 0
-	  } else if (arguments[0] instanceof Coordinate) {
-	    var p = arguments[0];
-	    return CGAlgorithms.orientationIndex(this.p0, this.p1, p)
-	  }
-	};
-	LineSegment.prototype.toGeometry = function toGeometry (geomFactory) {
-	  return geomFactory.createLineString([this.p0, this.p1])
-	};
-	LineSegment.prototype.isVertical = function isVertical () {
-	  return this.p0.x === this.p1.x
-	};
-	LineSegment.prototype.equals = function equals (o) {
-	  if (!(o instanceof LineSegment)) {
-	    return false
-	  }
-	  var other = o;
-	  return this.p0.equals(other.p0) && this.p1.equals(other.p1)
-	};
-	LineSegment.prototype.intersection = function intersection (line) {
-	  var li = new RobustLineIntersector();
-	  li.computeIntersection(this.p0, this.p1, line.p0, line.p1);
-	  if (li.hasIntersection()) { return li.getIntersection(0) }
-	  return null
-	};
-	LineSegment.prototype.project = function project () {
-	  if (arguments[0] instanceof Coordinate) {
-	    var p = arguments[0];
-	    if (p.equals(this.p0) || p.equals(this.p1)) { return new Coordinate(p) }
-	    var r = this.projectionFactor(p);
-	    var coord = new Coordinate();
-	    coord.x = this.p0.x + r * (this.p1.x - this.p0.x);
-	    coord.y = this.p0.y + r * (this.p1.y - this.p0.y);
-	    return coord
-	  } else if (arguments[0] instanceof LineSegment) {
-	    var seg = arguments[0];
-	    var pf0 = this.projectionFactor(seg.p0);
-	    var pf1 = this.projectionFactor(seg.p1);
-	    if (pf0 >= 1.0 && pf1 >= 1.0) { return null }
-	    if (pf0 <= 0.0 && pf1 <= 0.0) { return null }
-	    var newp0 = this.project(seg.p0);
-	    if (pf0 < 0.0) { newp0 = this.p0; }
-	    if (pf0 > 1.0) { newp0 = this.p1; }
-	    var newp1 = this.project(seg.p1);
-	    if (pf1 < 0.0) { newp1 = this.p0; }
-	    if (pf1 > 1.0) { newp1 = this.p1; }
-	    return new LineSegment(newp0, newp1)
-	  }
-	};
-	LineSegment.prototype.normalize = function normalize () {
-	  if (this.p1.compareTo(this.p0) < 0) { this.reverse(); }
-	};
-	LineSegment.prototype.angle = function angle () {
-	  return Math.atan2(this.p1.y - this.p0.y, this.p1.x - this.p0.x)
-	};
-	LineSegment.prototype.getCoordinate = function getCoordinate (i) {
-	  if (i === 0) { return this.p0 }
-	  return this.p1
-	};
-	LineSegment.prototype.distancePerpendicular = function distancePerpendicular (p) {
-	  return CGAlgorithms.distancePointLinePerpendicular(p, this.p0, this.p1)
-	};
-	LineSegment.prototype.minY = function minY () {
-	  return Math.min(this.p0.y, this.p1.y)
-	};
-	LineSegment.prototype.midPoint = function midPoint () {
-	  return LineSegment.midPoint(this.p0, this.p1)
-	};
-	LineSegment.prototype.projectionFactor = function projectionFactor (p) {
-	  if (p.equals(this.p0)) { return 0.0 }
-	  if (p.equals(this.p1)) { return 1.0 }
-	  var dx = this.p1.x - this.p0.x;
-	  var dy = this.p1.y - this.p0.y;
-	  var len = dx * dx + dy * dy;
-	  if (len <= 0.0) { return Double.NaN }
-	  var r = ((p.x - this.p0.x) * dx + (p.y - this.p0.y) * dy) / len;
-	  return r
-	};
-	LineSegment.prototype.closestPoints = function closestPoints (line) {
-	  var intPt = this.intersection(line);
-	  if (intPt !== null) {
-	    return [intPt, intPt]
-	  }
-	  var closestPt = new Array(2).fill(null);
-	  var minDistance = Double.MAX_VALUE;
-	  var dist = null;
-	  var close00 = this.closestPoint(line.p0);
-	  minDistance = close00.distance(line.p0);
-	  closestPt[0] = close00;
-	  closestPt[1] = line.p0;
-	  var close01 = this.closestPoint(line.p1);
-	  dist = close01.distance(line.p1);
-	  if (dist < minDistance) {
-	    minDistance = dist;
-	    closestPt[0] = close01;
-	    closestPt[1] = line.p1;
-	  }
-	  var close10 = line.closestPoint(this.p0);
-	  dist = close10.distance(this.p0);
-	  if (dist < minDistance) {
-	    minDistance = dist;
-	    closestPt[0] = this.p0;
-	    closestPt[1] = close10;
-	  }
-	  var close11 = line.closestPoint(this.p1);
-	  dist = close11.distance(this.p1);
-	  if (dist < minDistance) {
-	    minDistance = dist;
-	    closestPt[0] = this.p1;
-	    closestPt[1] = close11;
-	  }
-	  return closestPt
-	};
-	LineSegment.prototype.closestPoint = function closestPoint (p) {
-	  var factor = this.projectionFactor(p);
-	  if (factor > 0 && factor < 1) {
-	    return this.project(p)
-	  }
-	  var dist0 = this.p0.distance(p);
-	  var dist1 = this.p1.distance(p);
-	  if (dist0 < dist1) { return this.p0 }
-	  return this.p1
-	};
-	LineSegment.prototype.maxX = function maxX () {
-	  return Math.max(this.p0.x, this.p1.x)
-	};
-	LineSegment.prototype.getLength = function getLength () {
-	  return this.p0.distance(this.p1)
-	};
-	LineSegment.prototype.compareTo = function compareTo (o) {
-	  var other = o;
-	  var comp0 = this.p0.compareTo(other.p0);
-	  if (comp0 !== 0) { return comp0 }
-	  return this.p1.compareTo(other.p1)
-	};
-	LineSegment.prototype.reverse = function reverse () {
-	  var temp = this.p0;
-	  this.p0 = this.p1;
-	  this.p1 = temp;
-	};
-	LineSegment.prototype.equalsTopo = function equalsTopo (other) {
-	  return this.p0.equals(other.p0) &&
-	        (this.p1.equals(other.p1) || this.p0.equals(other.p1)) &&
-	         this.p1.equals(other.p0)
-	};
-	LineSegment.prototype.lineIntersection = function lineIntersection (line) {
-	  try {
-	    var intPt = HCoordinate.intersection(this.p0, this.p1, line.p0, line.p1);
-	    return intPt
-	  } catch (ex) {
-	    if (ex instanceof NotRepresentableException) ; else { throw ex }
-	  } finally {}
-	  return null
-	};
-	LineSegment.prototype.maxY = function maxY () {
-	  return Math.max(this.p0.y, this.p1.y)
-	};
-	LineSegment.prototype.pointAlongOffset = function pointAlongOffset (segmentLengthFraction, offsetDistance) {
-	  var segx = this.p0.x + segmentLengthFraction * (this.p1.x - this.p0.x);
-	  var segy = this.p0.y + segmentLengthFraction * (this.p1.y - this.p0.y);
-	  var dx = this.p1.x - this.p0.x;
-	  var dy = this.p1.y - this.p0.y;
-	  var len = Math.sqrt(dx * dx + dy * dy);
-	  var ux = 0.0;
-	  var uy = 0.0;
-	  if (offsetDistance !== 0.0) {
-	    if (len <= 0.0) { throw new Error('Cannot compute offset from zero-length line segment') }
-	    ux = offsetDistance * dx / len;
-	    uy = offsetDistance * dy / len;
-	  }
-	  var offsetx = segx - uy;
-	  var offsety = segy + ux;
-	  var coord = new Coordinate(offsetx, offsety);
-	  return coord
-	};
-	LineSegment.prototype.setCoordinates = function setCoordinates () {
-	  if (arguments.length === 1) {
-	    var ls = arguments[0];
-	    this.setCoordinates(ls.p0, ls.p1);
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    this.p0.x = p0.x;
-	    this.p0.y = p0.y;
-	    this.p1.x = p1.x;
-	    this.p1.y = p1.y;
-	  }
-	};
-	LineSegment.prototype.segmentFraction = function segmentFraction (inputPt) {
-	  var segFrac = this.projectionFactor(inputPt);
-	  if (segFrac < 0.0) { segFrac = 0.0; } else if (segFrac > 1.0 || Double.isNaN(segFrac)) { segFrac = 1.0; }
-	  return segFrac
-	};
-	LineSegment.prototype.toString = function toString () {
-	  return 'LINESTRING( ' + this.p0.x + ' ' + this.p0.y + ', ' + this.p1.x + ' ' + this.p1.y + ')'
-	};
-	LineSegment.prototype.isHorizontal = function isHorizontal () {
-	  return this.p0.y === this.p1.y
-	};
-	LineSegment.prototype.distance = function distance () {
-	  if (arguments[0] instanceof LineSegment) {
-	    var ls = arguments[0];
-	    return CGAlgorithms.distanceLineLine(this.p0, this.p1, ls.p0, ls.p1)
-	  } else if (arguments[0] instanceof Coordinate) {
-	    var p = arguments[0];
-	    return CGAlgorithms.distancePointLine(p, this.p0, this.p1)
-	  }
-	};
-	LineSegment.prototype.pointAlong = function pointAlong (segmentLengthFraction) {
-	  var coord = new Coordinate();
-	  coord.x = this.p0.x + segmentLengthFraction * (this.p1.x - this.p0.x);
-	  coord.y = this.p0.y + segmentLengthFraction * (this.p1.y - this.p0.y);
-	  return coord
-	};
-	LineSegment.prototype.hashCode = function hashCode () {
-	  var bits0 = Double.doubleToLongBits(this.p0.x);
-	  bits0 ^= Double.doubleToLongBits(this.p0.y) * 31;
-	  var hash0 = Math.trunc(bits0) ^ Math.trunc(bits0 >> 32);
-	  var bits1 = Double.doubleToLongBits(this.p1.x);
-	  bits1 ^= Double.doubleToLongBits(this.p1.y) * 31;
-	  var hash1 = Math.trunc(bits1) ^ Math.trunc(bits1 >> 32);
-	  return hash0 ^ hash1
-	};
-	LineSegment.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable, Serializable]
-	};
-	LineSegment.prototype.getClass = function getClass () {
-	  return LineSegment
-	};
-	LineSegment.midPoint = function midPoint (p0, p1) {
-	  return new Coordinate((p0.x + p1.x) / 2, (p0.y + p1.y) / 2)
-	};
-	staticAccessors$24.serialVersionUID.get = function () { return 3252005833466256227 };
+	        function sha256_R(X, n) {
+	          return X >>> n;
+	        }
 
-	Object.defineProperties( LineSegment, staticAccessors$24 );
+	        function sha256_Ch(x, y, z) {
+	          return x & y ^ ~x & z;
+	        }
 
-	var MonotoneChainOverlapAction = function MonotoneChainOverlapAction () {
-	  this.tempEnv1 = new Envelope();
-	  this.tempEnv2 = new Envelope();
-	  this._overlapSeg1 = new LineSegment();
-	  this._overlapSeg2 = new LineSegment();
-	};
-	MonotoneChainOverlapAction.prototype.overlap = function overlap () {
-	  if (arguments.length === 2) ; else if (arguments.length === 4) {
-	    var mc1 = arguments[0];
-	    var start1 = arguments[1];
-	    var mc2 = arguments[2];
-	    var start2 = arguments[3];
-	    mc1.getLineSegment(start1, this._overlapSeg1);
-	    mc2.getLineSegment(start2, this._overlapSeg2);
-	    this.overlap(this._overlapSeg1, this._overlapSeg2);
-	  }
-	};
-	MonotoneChainOverlapAction.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChainOverlapAction.prototype.getClass = function getClass () {
-	  return MonotoneChainOverlapAction
-	};
+	        function sha256_Maj(x, y, z) {
+	          return x & y ^ x & z ^ y & z;
+	        }
 
-	var MonotoneChain = function MonotoneChain () {
-	  this._pts = null;
-	  this._start = null;
-	  this._end = null;
-	  this._env = null;
-	  this._context = null;
-	  this._id = null;
-	  var pts = arguments[0];
-	  var start = arguments[1];
-	  var end = arguments[2];
-	  var context = arguments[3];
-	  this._pts = pts;
-	  this._start = start;
-	  this._end = end;
-	  this._context = context;
-	};
-	MonotoneChain.prototype.getLineSegment = function getLineSegment (index, ls) {
-	  ls.p0 = this._pts[index];
-	  ls.p1 = this._pts[index + 1];
-	};
-	MonotoneChain.prototype.computeSelect = function computeSelect (searchEnv, start0, end0, mcs) {
-	  var p0 = this._pts[start0];
-	  var p1 = this._pts[end0];
-	  mcs.tempEnv1.init(p0, p1);
-	  if (end0 - start0 === 1) {
-	    mcs.select(this, start0);
-	    return null
-	  }
-	  if (!searchEnv.intersects(mcs.tempEnv1)) { return null }
-	  var mid = Math.trunc((start0 + end0) / 2);
-	  if (start0 < mid) {
-	    this.computeSelect(searchEnv, start0, mid, mcs);
-	  }
-	  if (mid < end0) {
-	    this.computeSelect(searchEnv, mid, end0, mcs);
-	  }
-	};
-	MonotoneChain.prototype.getCoordinates = function getCoordinates () {
-	    var this$1 = this;
+	        function sha256_Sigma0256(x) {
+	          return sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22);
+	        }
 
-	  var coord = new Array(this._end - this._start + 1).fill(null);
-	  var index = 0;
-	  for (var i = this._start; i <= this._end; i++) {
-	    coord[index++] = this$1._pts[i];
-	  }
-	  return coord
-	};
-	MonotoneChain.prototype.computeOverlaps = function computeOverlaps (mc, mco) {
-	  this.computeOverlapsInternal(this._start, this._end, mc, mc._start, mc._end, mco);
-	};
-	MonotoneChain.prototype.setId = function setId (id) {
-	  this._id = id;
-	};
-	MonotoneChain.prototype.select = function select (searchEnv, mcs) {
-	  this.computeSelect(searchEnv, this._start, this._end, mcs);
-	};
-	MonotoneChain.prototype.getEnvelope = function getEnvelope () {
-	  if (this._env === null) {
-	    var p0 = this._pts[this._start];
-	    var p1 = this._pts[this._end];
-	    this._env = new Envelope(p0, p1);
-	  }
-	  return this._env
-	};
-	MonotoneChain.prototype.getEndIndex = function getEndIndex () {
-	  return this._end
-	};
-	MonotoneChain.prototype.getStartIndex = function getStartIndex () {
-	  return this._start
-	};
-	MonotoneChain.prototype.getContext = function getContext () {
-	  return this._context
-	};
-	MonotoneChain.prototype.getId = function getId () {
-	  return this._id
-	};
-	MonotoneChain.prototype.computeOverlapsInternal = function computeOverlapsInternal (start0, end0, mc, start1, end1, mco) {
-	  var p00 = this._pts[start0];
-	  var p01 = this._pts[end0];
-	  var p10 = mc._pts[start1];
-	  var p11 = mc._pts[end1];
-	  if (end0 - start0 === 1 && end1 - start1 === 1) {
-	    mco.overlap(this, start0, mc, start1);
-	    return null
-	  }
-	  mco.tempEnv1.init(p00, p01);
-	  mco.tempEnv2.init(p10, p11);
-	  if (!mco.tempEnv1.intersects(mco.tempEnv2)) { return null }
-	  var mid0 = Math.trunc((start0 + end0) / 2);
-	  var mid1 = Math.trunc((start1 + end1) / 2);
-	  if (start0 < mid0) {
-	    if (start1 < mid1) { this.computeOverlapsInternal(start0, mid0, mc, start1, mid1, mco); }
-	    if (mid1 < end1) { this.computeOverlapsInternal(start0, mid0, mc, mid1, end1, mco); }
-	  }
-	  if (mid0 < end0) {
-	    if (start1 < mid1) { this.computeOverlapsInternal(mid0, end0, mc, start1, mid1, mco); }
-	    if (mid1 < end1) { this.computeOverlapsInternal(mid0, end0, mc, mid1, end1, mco); }
-	  }
-	};
-	MonotoneChain.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChain.prototype.getClass = function getClass () {
-	  return MonotoneChain
-	};
+	        function sha256_Sigma1256(x) {
+	          return sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25);
+	        }
 
-	var MonotoneChainBuilder = function MonotoneChainBuilder () {};
+	        function sha256_Gamma0256(x) {
+	          return sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3);
+	        }
 
-	MonotoneChainBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChainBuilder.prototype.getClass = function getClass () {
-	  return MonotoneChainBuilder
-	};
-	MonotoneChainBuilder.getChainStartIndices = function getChainStartIndices (pts) {
-	  var start = 0;
-	  var startIndexList = new ArrayList();
-	  startIndexList.add(new Integer(start));
-	  do {
-	    var last = MonotoneChainBuilder.findChainEnd(pts, start);
-	    startIndexList.add(new Integer(last));
-	    start = last;
-	  } while (start < pts.length - 1)
-	  var startIndex = MonotoneChainBuilder.toIntArray(startIndexList);
-	  return startIndex
-	};
-	MonotoneChainBuilder.findChainEnd = function findChainEnd (pts, start) {
-	  var safeStart = start;
-	  while (safeStart < pts.length - 1 && pts[safeStart].equals2D(pts[safeStart + 1])) {
-	    safeStart++;
-	  }
-	  if (safeStart >= pts.length - 1) {
-	    return pts.length - 1
-	  }
-	  var chainQuad = Quadrant.quadrant(pts[safeStart], pts[safeStart + 1]);
-	  var last = start + 1;
-	  while (last < pts.length) {
-	    if (!pts[last - 1].equals2D(pts[last])) {
-	      var quad = Quadrant.quadrant(pts[last - 1], pts[last]);
-	      if (quad !== chainQuad) { break }
-	    }
-	    last++;
-	  }
-	  return last - 1
-	};
-	MonotoneChainBuilder.getChains = function getChains () {
-	  if (arguments.length === 1) {
-	    var pts = arguments[0];
-	    return MonotoneChainBuilder.getChains(pts, null)
-	  } else if (arguments.length === 2) {
-	    var pts$1 = arguments[0];
-	    var context = arguments[1];
-	    var mcList = new ArrayList();
-	    var startIndex = MonotoneChainBuilder.getChainStartIndices(pts$1);
-	    for (var i = 0; i < startIndex.length - 1; i++) {
-	      var mc = new MonotoneChain(pts$1, startIndex[i], startIndex[i + 1], context);
-	      mcList.add(mc);
-	    }
-	    return mcList
-	  }
-	};
-	MonotoneChainBuilder.toIntArray = function toIntArray (list) {
-	  var array = new Array(list.size()).fill(null);
-	  for (var i = 0; i < array.length; i++) {
-	    array[i] = list.get(i).intValue();
-	  }
-	  return array
-	};
+	        function sha256_Gamma1256(x) {
+	          return sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10);
+	        }
 
-	var Noder = function Noder () {};
+	        sha256_K = [1116352408, 1899447441, -1245643825, -373957723, 961987163, 1508970993, -1841331548, -1424204075, -670586216, 310598401, 607225278, 1426881987, 1925078388, -2132889090, -1680079193, -1046744716, -459576895, -272742522, 264347078, 604807628, 770255983, 1249150122, 1555081692, 1996064986, -1740746414, -1473132947, -1341970488, -1084653625, -958395405, -710438585, 113926993, 338241895, 666307205, 773529912, 1294757372, 1396182291, 1695183700, 1986661051, -2117940946, -1838011259, -1564481375, -1474664885, -1035236496, -949202525, -778901479, -694614492, -200395387, 275423344, 430227734, 506948616, 659060556, 883997877, 958139571, 1322822218, 1537002063, 1747873779, 1955562222, 2024104815, -2067236844, -1933114872, -1866530822, -1538233109, -1090935817, -965641998];
 
-	Noder.prototype.computeNodes = function computeNodes (segStrings) {};
-	Noder.prototype.getNodedSubstrings = function getNodedSubstrings () {};
-	Noder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Noder.prototype.getClass = function getClass () {
-	  return Noder
-	};
+	        function binb(m, l) {
+	          var HASH = [1779033703, -1150833019, 1013904242, -1521486534, 1359893119, -1694144372, 528734635, 1541459225];
+	          var W = new Array(64);
+	          var a, b, c, d, e, f, g, h;
+	          var i, j, T1, T2;
+	          /* append padding */
 
-	var SinglePassNoder = function SinglePassNoder () {
-	  this._segInt = null;
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var segInt = arguments[0];
-	    this.setSegmentIntersector(segInt);
-	  }
-	};
-	SinglePassNoder.prototype.setSegmentIntersector = function setSegmentIntersector (segInt) {
-	  this._segInt = segInt;
-	};
-	SinglePassNoder.prototype.interfaces_ = function interfaces_ () {
-	  return [Noder]
-	};
-	SinglePassNoder.prototype.getClass = function getClass () {
-	  return SinglePassNoder
-	};
+	          m[l >> 5] |= 0x80 << 24 - l % 32;
+	          m[(l + 64 >> 9 << 4) + 15] = l;
 
-	var MCIndexNoder = (function (SinglePassNoder$$1) {
-	  function MCIndexNoder (si) {
-	    if (si) { SinglePassNoder$$1.call(this, si); }
-	    else { SinglePassNoder$$1.call(this); }
-	    this._monoChains = new ArrayList();
-	    this._index = new STRtree();
-	    this._idCounter = 0;
-	    this._nodedSegStrings = null;
-	    this._nOverlaps = 0;
-	  }
+	          for (i = 0; i < m.length; i += 16) {
+	            a = HASH[0];
+	            b = HASH[1];
+	            c = HASH[2];
+	            d = HASH[3];
+	            e = HASH[4];
+	            f = HASH[5];
+	            g = HASH[6];
+	            h = HASH[7];
+
+	            for (j = 0; j < 64; j += 1) {
+	              if (j < 16) {
+	                W[j] = m[j + i];
+	              } else {
+	                W[j] = safe_add(safe_add(safe_add(sha256_Gamma1256(W[j - 2]), W[j - 7]), sha256_Gamma0256(W[j - 15])), W[j - 16]);
+	              }
+
+	              T1 = safe_add(safe_add(safe_add(safe_add(h, sha256_Sigma1256(e)), sha256_Ch(e, f, g)), sha256_K[j]), W[j]);
+	              T2 = safe_add(sha256_Sigma0256(a), sha256_Maj(a, b, c));
+	              h = g;
+	              g = f;
+	              f = e;
+	              e = safe_add(d, T1);
+	              d = c;
+	              c = b;
+	              b = a;
+	              a = safe_add(T1, T2);
+	            }
+
+	            HASH[0] = safe_add(a, HASH[0]);
+	            HASH[1] = safe_add(b, HASH[1]);
+	            HASH[2] = safe_add(c, HASH[2]);
+	            HASH[3] = safe_add(d, HASH[3]);
+	            HASH[4] = safe_add(e, HASH[4]);
+	            HASH[5] = safe_add(f, HASH[5]);
+	            HASH[6] = safe_add(g, HASH[6]);
+	            HASH[7] = safe_add(h, HASH[7]);
+	          }
+
+	          return HASH;
+	        }
+	      },
+
+	      /**
+	       * @class Hashes.SHA512
+	       * @param {config}
+	       *
+	       * A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined in FIPS 180-2
+	       * Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009.
+	       * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+	       * See http://pajhome.org.uk/crypt/md5 for details.
+	       */
+	      SHA512: function SHA512(options) {
+	        /**
+	         * Private properties configuration variables. You may need to tweak these to be compatible with
+	         * the server-side, but the defaults work in most cases.
+	         * @see this.setUpperCase() method
+	         * @see this.setPad() method
+	         */
+	        options && typeof options.uppercase === 'boolean' ? options.uppercase : false;
+
+	        var /* hexadecimal output case format. false - lowercase; true - uppercase  */
+	        b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
 
-	  if ( SinglePassNoder$$1 ) { MCIndexNoder.__proto__ = SinglePassNoder$$1; }
-	  MCIndexNoder.prototype = Object.create( SinglePassNoder$$1 && SinglePassNoder$$1.prototype );
-	  MCIndexNoder.prototype.constructor = MCIndexNoder;
+	        /* base-64 pad character. Default '=' for strict RFC compliance   */
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-	  var staticAccessors = { SegmentOverlapAction: { configurable: true } };
-	  MCIndexNoder.prototype.getMonotoneChains = function getMonotoneChains () {
-	    return this._monoChains
-	  };
-	  MCIndexNoder.prototype.getNodedSubstrings = function getNodedSubstrings () {
-	    return NodedSegmentString.getNodedSubstrings(this._nodedSegStrings)
-	  };
-	  MCIndexNoder.prototype.getIndex = function getIndex () {
-	    return this._index
-	  };
-	  MCIndexNoder.prototype.add = function add (segStr) {
-	    var this$1 = this;
-
-	    var segChains = MonotoneChainBuilder.getChains(segStr.getCoordinates(), segStr);
-	    for (var i = segChains.iterator(); i.hasNext();) {
-	      var mc = i.next();
-	      mc.setId(this$1._idCounter++);
-	      this$1._index.insert(mc.getEnvelope(), mc);
-	      this$1._monoChains.add(mc);
-	    }
-	  };
-	  MCIndexNoder.prototype.computeNodes = function computeNodes (inputSegStrings) {
-	    var this$1 = this;
-
-	    this._nodedSegStrings = inputSegStrings;
-	    for (var i = inputSegStrings.iterator(); i.hasNext();) {
-	      this$1.add(i.next());
-	    }
-	    this.intersectChains();
-	  };
-	  MCIndexNoder.prototype.intersectChains = function intersectChains () {
-	    var this$1 = this;
-
-	    var overlapAction = new SegmentOverlapAction(this._segInt);
-	    for (var i = this._monoChains.iterator(); i.hasNext();) {
-	      var queryChain = i.next();
-	      var overlapChains = this$1._index.query(queryChain.getEnvelope());
-	      for (var j = overlapChains.iterator(); j.hasNext();) {
-	        var testChain = j.next();
-	        if (testChain.getId() > queryChain.getId()) {
-	          queryChain.computeOverlaps(testChain, overlapAction);
-	          this$1._nOverlaps++;
-	        }
-	        if (this$1._segInt.isDone()) { return null }
-	      }
-	    }
-	  };
-	  MCIndexNoder.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  MCIndexNoder.prototype.getClass = function getClass () {
-	    return MCIndexNoder
-	  };
-	  staticAccessors.SegmentOverlapAction.get = function () { return SegmentOverlapAction };
-
-	  Object.defineProperties( MCIndexNoder, staticAccessors );
-
-	  return MCIndexNoder;
-	}(SinglePassNoder));
-
-	var SegmentOverlapAction = (function (MonotoneChainOverlapAction$$1) {
-	  function SegmentOverlapAction () {
-	    MonotoneChainOverlapAction$$1.call(this);
-	    this._si = null;
-	    var si = arguments[0];
-	    this._si = si;
-	  }
-
-	  if ( MonotoneChainOverlapAction$$1 ) { SegmentOverlapAction.__proto__ = MonotoneChainOverlapAction$$1; }
-	  SegmentOverlapAction.prototype = Object.create( MonotoneChainOverlapAction$$1 && MonotoneChainOverlapAction$$1.prototype );
-	  SegmentOverlapAction.prototype.constructor = SegmentOverlapAction;
-	  SegmentOverlapAction.prototype.overlap = function overlap () {
-	    if (arguments.length === 4) {
-	      var mc1 = arguments[0];
-	      var start1 = arguments[1];
-	      var mc2 = arguments[2];
-	      var start2 = arguments[3];
-	      var ss1 = mc1.getContext();
-	      var ss2 = mc2.getContext();
-	      this._si.processIntersections(ss1, start1, ss2, start2);
-	    } else { return MonotoneChainOverlapAction$$1.prototype.overlap.apply(this, arguments) }
-	  };
-	  SegmentOverlapAction.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  SegmentOverlapAction.prototype.getClass = function getClass () {
-	    return SegmentOverlapAction
-	  };
-
-	  return SegmentOverlapAction;
-	}(MonotoneChainOverlapAction));
+	        /* enable/disable utf8 encoding */
+	        sha512_k;
+	        /* privileged (public) methods */
 
-	var BufferParameters = function BufferParameters () {
-	  this._quadrantSegments = BufferParameters.DEFAULT_QUADRANT_SEGMENTS;
-	  this._endCapStyle = BufferParameters.CAP_ROUND;
-	  this._joinStyle = BufferParameters.JOIN_ROUND;
-	  this._mitreLimit = BufferParameters.DEFAULT_MITRE_LIMIT;
-	  this._isSingleSided = false;
-	  this._simplifyFactor = BufferParameters.DEFAULT_SIMPLIFY_FACTOR;
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s));
+	        };
 
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var quadrantSegments = arguments[0];
-	    this.setQuadrantSegments(quadrantSegments);
-	  } else if (arguments.length === 2) {
-	    var quadrantSegments$1 = arguments[0];
-	    var endCapStyle = arguments[1];
-	    this.setQuadrantSegments(quadrantSegments$1);
-	    this.setEndCapStyle(endCapStyle);
-	  } else if (arguments.length === 4) {
-	    var quadrantSegments$2 = arguments[0];
-	    var endCapStyle$1 = arguments[1];
-	    var joinStyle = arguments[2];
-	    var mitreLimit = arguments[3];
-	    this.setQuadrantSegments(quadrantSegments$2);
-	    this.setEndCapStyle(endCapStyle$1);
-	    this.setJoinStyle(joinStyle);
-	    this.setMitreLimit(mitreLimit);
-	  }
-	};
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	var staticAccessors$25 = { CAP_ROUND: { configurable: true },CAP_FLAT: { configurable: true },CAP_SQUARE: { configurable: true },JOIN_ROUND: { configurable: true },JOIN_MITRE: { configurable: true },JOIN_BEVEL: { configurable: true },DEFAULT_QUADRANT_SEGMENTS: { configurable: true },DEFAULT_MITRE_LIMIT: { configurable: true },DEFAULT_SIMPLIFY_FACTOR: { configurable: true } };
-	BufferParameters.prototype.getEndCapStyle = function getEndCapStyle () {
-	  return this._endCapStyle
-	};
-	BufferParameters.prototype.isSingleSided = function isSingleSided () {
-	  return this._isSingleSided
-	};
-	BufferParameters.prototype.setQuadrantSegments = function setQuadrantSegments (quadSegs) {
-	  this._quadrantSegments = quadSegs;
-	  if (this._quadrantSegments === 0) { this._joinStyle = BufferParameters.JOIN_BEVEL; }
-	  if (this._quadrantSegments < 0) {
-	    this._joinStyle = BufferParameters.JOIN_MITRE;
-	    this._mitreLimit = Math.abs(this._quadrantSegments);
-	  }
-	  if (quadSegs <= 0) {
-	    this._quadrantSegments = 1;
-	  }
-	  if (this._joinStyle !== BufferParameters.JOIN_ROUND) {
-	    this._quadrantSegments = BufferParameters.DEFAULT_QUADRANT_SEGMENTS;
-	  }
-	};
-	BufferParameters.prototype.getJoinStyle = function getJoinStyle () {
-	  return this._joinStyle
-	};
-	BufferParameters.prototype.setJoinStyle = function setJoinStyle (joinStyle) {
-	  this._joinStyle = joinStyle;
-	};
-	BufferParameters.prototype.setSimplifyFactor = function setSimplifyFactor (simplifyFactor) {
-	  this._simplifyFactor = simplifyFactor < 0 ? 0 : simplifyFactor;
-	};
-	BufferParameters.prototype.getSimplifyFactor = function getSimplifyFactor () {
-	  return this._simplifyFactor
-	};
-	BufferParameters.prototype.getQuadrantSegments = function getQuadrantSegments () {
-	  return this._quadrantSegments
-	};
-	BufferParameters.prototype.setEndCapStyle = function setEndCapStyle (endCapStyle) {
-	  this._endCapStyle = endCapStyle;
-	};
-	BufferParameters.prototype.getMitreLimit = function getMitreLimit () {
-	  return this._mitreLimit
-	};
-	BufferParameters.prototype.setMitreLimit = function setMitreLimit (mitreLimit) {
-	  this._mitreLimit = mitreLimit;
-	};
-	BufferParameters.prototype.setSingleSided = function setSingleSided (isSingleSided) {
-	  this._isSingleSided = isSingleSided;
-	};
-	BufferParameters.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferParameters.prototype.getClass = function getClass () {
-	  return BufferParameters
-	};
-	BufferParameters.bufferDistanceError = function bufferDistanceError (quadSegs) {
-	  var alpha = Math.PI / 2.0 / quadSegs;
-	  return 1 - Math.cos(alpha / 2.0)
-	};
-	staticAccessors$25.CAP_ROUND.get = function () { return 1 };
-	staticAccessors$25.CAP_FLAT.get = function () { return 2 };
-	staticAccessors$25.CAP_SQUARE.get = function () { return 3 };
-	staticAccessors$25.JOIN_ROUND.get = function () { return 1 };
-	staticAccessors$25.JOIN_MITRE.get = function () { return 2 };
-	staticAccessors$25.JOIN_BEVEL.get = function () { return 3 };
-	staticAccessors$25.DEFAULT_QUADRANT_SEGMENTS.get = function () { return 8 };
-	staticAccessors$25.DEFAULT_MITRE_LIMIT.get = function () { return 5.0 };
-	staticAccessors$25.DEFAULT_SIMPLIFY_FACTOR.get = function () { return 0.01 };
-
-	Object.defineProperties( BufferParameters, staticAccessors$25 );
-
-	var BufferInputLineSimplifier = function BufferInputLineSimplifier (inputLine) {
-	  this._distanceTol = null;
-	  this._isDeleted = null;
-	  this._angleOrientation = CGAlgorithms.COUNTERCLOCKWISE;
-	  this._inputLine = inputLine || null;
-	};
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	var staticAccessors$26 = { INIT: { configurable: true },DELETE: { configurable: true },KEEP: { configurable: true },NUM_PTS_TO_CHECK: { configurable: true } };
-	BufferInputLineSimplifier.prototype.isDeletable = function isDeletable (i0, i1, i2, distanceTol) {
-	  var p0 = this._inputLine[i0];
-	  var p1 = this._inputLine[i1];
-	  var p2 = this._inputLine[i2];
-	  if (!this.isConcave(p0, p1, p2)) { return false }
-	  if (!this.isShallow(p0, p1, p2, distanceTol)) { return false }
-	  return this.isShallowSampled(p0, p1, i0, i2, distanceTol)
-	};
-	BufferInputLineSimplifier.prototype.deleteShallowConcavities = function deleteShallowConcavities () {
-	    var this$1 = this;
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	  var index = 1;
-	  // const maxIndex = this._inputLine.length - 1
-	  var midIndex = this.findNextNonDeletedIndex(index);
-	  var lastIndex = this.findNextNonDeletedIndex(midIndex);
-	  var isChanged = false;
-	  while (lastIndex < this._inputLine.length) {
-	    var isMiddleVertexDeleted = false;
-	    if (this$1.isDeletable(index, midIndex, lastIndex, this$1._distanceTol)) {
-	      this$1._isDeleted[midIndex] = BufferInputLineSimplifier.DELETE;
-	      isMiddleVertexDeleted = true;
-	      isChanged = true;
-	    }
-	    if (isMiddleVertexDeleted) { index = lastIndex; } else { index = midIndex; }
-	    midIndex = this$1.findNextNonDeletedIndex(index);
-	    lastIndex = this$1.findNextNonDeletedIndex(midIndex);
-	  }
-	  return isChanged
-	};
-	BufferInputLineSimplifier.prototype.isShallowConcavity = function isShallowConcavity (p0, p1, p2, distanceTol) {
-	  var orientation = CGAlgorithms.computeOrientation(p0, p1, p2);
-	  var isAngleToSimplify = orientation === this._angleOrientation;
-	  if (!isAngleToSimplify) { return false }
-	  var dist = CGAlgorithms.distancePointLine(p1, p0, p2);
-	  return dist < distanceTol
-	};
-	BufferInputLineSimplifier.prototype.isShallowSampled = function isShallowSampled (p0, p2, i0, i2, distanceTol) {
-	    var this$1 = this;
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	  var inc = Math.trunc((i2 - i0) / BufferInputLineSimplifier.NUM_PTS_TO_CHECK);
-	  if (inc <= 0) { inc = 1; }
-	  for (var i = i0; i < i2; i += inc) {
-	    if (!this$1.isShallow(p0, p2, this$1._inputLine[i], distanceTol)) { return false }
-	  }
-	  return true
-	};
-	BufferInputLineSimplifier.prototype.isConcave = function isConcave (p0, p1, p2) {
-	  var orientation = CGAlgorithms.computeOrientation(p0, p1, p2);
-	  var isConcave = orientation === this._angleOrientation;
-	  return isConcave
-	};
-	BufferInputLineSimplifier.prototype.simplify = function simplify (distanceTol) {
-	    var this$1 = this;
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	  this._distanceTol = Math.abs(distanceTol);
-	  if (distanceTol < 0) { this._angleOrientation = CGAlgorithms.CLOCKWISE; }
-	  this._isDeleted = new Array(this._inputLine.length).fill(null);
-	  var isChanged = false;
-	  do {
-	    isChanged = this$1.deleteShallowConcavities();
-	  } while (isChanged)
-	  return this.collapseLine()
-	};
-	BufferInputLineSimplifier.prototype.findNextNonDeletedIndex = function findNextNonDeletedIndex (index) {
-	  var next = index + 1;
-	  while (next < this._inputLine.length && this._isDeleted[next] === BufferInputLineSimplifier.DELETE) { next++; }
-	  return next
-	};
-	BufferInputLineSimplifier.prototype.isShallow = function isShallow (p0, p1, p2, distanceTol) {
-	  var dist = CGAlgorithms.distancePointLine(p1, p0, p2);
-	  return dist < distanceTol
-	};
-	BufferInputLineSimplifier.prototype.collapseLine = function collapseLine () {
-	    var this$1 = this;
+	        this.any_hmac = function (k, d, e) {
+	          return rstr2any(rstr_hmac(k, d), e);
+	        };
+	        /**
+	         * Perform a simple self-test to see if the VM is working
+	         * @return {String} Hexadecimal hash sample
+	         * @public
+	         */
 
-	  var coordList = new CoordinateList();
-	  for (var i = 0; i < this._inputLine.length; i++) {
-	    if (this$1._isDeleted[i] !== BufferInputLineSimplifier.DELETE) { coordList.add(this$1._inputLine[i]); }
-	  }
-	  return coordList.toCoordinateArray()
-	};
-	BufferInputLineSimplifier.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferInputLineSimplifier.prototype.getClass = function getClass () {
-	  return BufferInputLineSimplifier
-	};
-	BufferInputLineSimplifier.simplify = function simplify (inputLine, distanceTol) {
-	  var simp = new BufferInputLineSimplifier(inputLine);
-	  return simp.simplify(distanceTol)
-	};
-	staticAccessors$26.INIT.get = function () { return 0 };
-	staticAccessors$26.DELETE.get = function () { return 1 };
-	staticAccessors$26.KEEP.get = function () { return 1 };
-	staticAccessors$26.NUM_PTS_TO_CHECK.get = function () { return 10 };
-
-	Object.defineProperties( BufferInputLineSimplifier, staticAccessors$26 );
-
-	var OffsetSegmentString = function OffsetSegmentString () {
-	  this._ptList = null;
-	  this._precisionModel = null;
-	  this._minimimVertexDistance = 0.0;
-	  this._ptList = new ArrayList();
-	};
 
-	var staticAccessors$28 = { COORDINATE_ARRAY_TYPE: { configurable: true } };
-	OffsetSegmentString.prototype.getCoordinates = function getCoordinates () {
-	  var coord = this._ptList.toArray(OffsetSegmentString.COORDINATE_ARRAY_TYPE);
-	  return coord
-	};
-	OffsetSegmentString.prototype.setPrecisionModel = function setPrecisionModel (precisionModel) {
-	  this._precisionModel = precisionModel;
-	};
-	OffsetSegmentString.prototype.addPt = function addPt (pt) {
-	  var bufPt = new Coordinate(pt);
-	  this._precisionModel.makePrecise(bufPt);
-	  if (this.isRedundant(bufPt)) { return null }
-	  this._ptList.add(bufPt);
-	};
-	OffsetSegmentString.prototype.revere = function revere () {};
-	OffsetSegmentString.prototype.addPts = function addPts (pt, isForward) {
-	    var this$1 = this;
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * @description Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	  if (isForward) {
-	    for (var i = 0; i < pt.length; i++) {
-	      this$1.addPt(pt[i]);
-	    }
-	  } else {
-	    for (var i$1 = pt.length - 1; i$1 >= 0; i$1--) {
-	      this$1.addPt(pt[i$1]);
-	    }
-	  }
-	};
-	OffsetSegmentString.prototype.isRedundant = function isRedundant (pt) {
-	  if (this._ptList.size() < 1) { return false }
-	  var lastPt = this._ptList.get(this._ptList.size() - 1);
-	  var ptDist = pt.distance(lastPt);
-	  if (ptDist < this._minimimVertexDistance) { return true }
-	  return false
-	};
-	OffsetSegmentString.prototype.toString = function toString () {
-	  var fact = new GeometryFactory();
-	  var line = fact.createLineString(this.getCoordinates());
-	  return line.toString()
-	};
-	OffsetSegmentString.prototype.closeRing = function closeRing () {
-	  if (this._ptList.size() < 1) { return null }
-	  var startPt = new Coordinate(this._ptList.get(0));
-	  var lastPt = this._ptList.get(this._ptList.size() - 1);
-	  // const last2Pt = null
-	  // if (this._ptList.size() >= 2) last2Pt = this._ptList.get(this._ptList.size() - 2)
-	  if (startPt.equals(lastPt)) { return null }
-	  this._ptList.add(startPt);
-	};
-	OffsetSegmentString.prototype.setMinimumVertexDistance = function setMinimumVertexDistance (minimimVertexDistance) {
-	  this._minimimVertexDistance = minimimVertexDistance;
-	};
-	OffsetSegmentString.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetSegmentString.prototype.getClass = function getClass () {
-	  return OffsetSegmentString
-	};
-	staticAccessors$28.COORDINATE_ARRAY_TYPE.get = function () { return new Array(0).fill(null) };
 
-	Object.defineProperties( OffsetSegmentString, staticAccessors$28 );
+	        this.setUpperCase = function (a) {
 
-	var Angle = function Angle () {};
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	var staticAccessors$29 = { PI_TIMES_2: { configurable: true },PI_OVER_2: { configurable: true },PI_OVER_4: { configurable: true },COUNTERCLOCKWISE: { configurable: true },CLOCKWISE: { configurable: true },NONE: { configurable: true } };
 
-	Angle.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Angle.prototype.getClass = function getClass () {
-	  return Angle
-	};
-	Angle.toDegrees = function toDegrees (radians) {
-	  return radians * 180 / Math.PI
-	};
-	Angle.normalize = function normalize (angle) {
-	  while (angle > Math.PI) { angle -= Angle.PI_TIMES_2; }
-	  while (angle <= -Math.PI) { angle += Angle.PI_TIMES_2; }
-	  return angle
-	};
-	Angle.angle = function angle () {
-	  if (arguments.length === 1) {
-	    var p = arguments[0];
-	    return Math.atan2(p.y, p.x)
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    var dx = p1.x - p0.x;
-	    var dy = p1.y - p0.y;
-	    return Math.atan2(dy, dx)
-	  }
-	};
-	Angle.isAcute = function isAcute (p0, p1, p2) {
-	  var dx0 = p0.x - p1.x;
-	  var dy0 = p0.y - p1.y;
-	  var dx1 = p2.x - p1.x;
-	  var dy1 = p2.y - p1.y;
-	  var dotprod = dx0 * dx1 + dy0 * dy1;
-	  return dotprod > 0
-	};
-	Angle.isObtuse = function isObtuse (p0, p1, p2) {
-	  var dx0 = p0.x - p1.x;
-	  var dy0 = p0.y - p1.y;
-	  var dx1 = p2.x - p1.x;
-	  var dy1 = p2.y - p1.y;
-	  var dotprod = dx0 * dx1 + dy0 * dy1;
-	  return dotprod < 0
-	};
-	Angle.interiorAngle = function interiorAngle (p0, p1, p2) {
-	  var anglePrev = Angle.angle(p1, p0);
-	  var angleNext = Angle.angle(p1, p2);
-	  return Math.abs(angleNext - anglePrev)
-	};
-	Angle.normalizePositive = function normalizePositive (angle) {
-	  if (angle < 0.0) {
-	    while (angle < 0.0) { angle += Angle.PI_TIMES_2; }
-	    if (angle >= Angle.PI_TIMES_2) { angle = 0.0; }
-	  } else {
-	    while (angle >= Angle.PI_TIMES_2) { angle -= Angle.PI_TIMES_2; }
-	    if (angle < 0.0) { angle = 0.0; }
-	  }
-	  return angle
-	};
-	Angle.angleBetween = function angleBetween (tip1, tail, tip2) {
-	  var a1 = Angle.angle(tail, tip1);
-	  var a2 = Angle.angle(tail, tip2);
-	  return Angle.diff(a1, a2)
-	};
-	Angle.diff = function diff (ang1, ang2) {
-	  var delAngle = null;
-	  if (ang1 < ang2) {
-	    delAngle = ang2 - ang1;
-	  } else {
-	    delAngle = ang1 - ang2;
-	  }
-	  if (delAngle > Math.PI) {
-	    delAngle = 2 * Math.PI - delAngle;
-	  }
-	  return delAngle
-	};
-	Angle.toRadians = function toRadians (angleDegrees) {
-	  return angleDegrees * Math.PI / 180.0
-	};
-	Angle.getTurn = function getTurn (ang1, ang2) {
-	  var crossproduct = Math.sin(ang2 - ang1);
-	  if (crossproduct > 0) {
-	    return Angle.COUNTERCLOCKWISE
-	  }
-	  if (crossproduct < 0) {
-	    return Angle.CLOCKWISE
-	  }
-	  return Angle.NONE
-	};
-	Angle.angleBetweenOriented = function angleBetweenOriented (tip1, tail, tip2) {
-	  var a1 = Angle.angle(tail, tip1);
-	  var a2 = Angle.angle(tail, tip2);
-	  var angDel = a2 - a1;
-	  if (angDel <= -Math.PI) { return angDel + Angle.PI_TIMES_2 }
-	  if (angDel > Math.PI) { return angDel - Angle.PI_TIMES_2 }
-	  return angDel
-	};
-	staticAccessors$29.PI_TIMES_2.get = function () { return 2.0 * Math.PI };
-	staticAccessors$29.PI_OVER_2.get = function () { return Math.PI / 2.0 };
-	staticAccessors$29.PI_OVER_4.get = function () { return Math.PI / 4.0 };
-	staticAccessors$29.COUNTERCLOCKWISE.get = function () { return CGAlgorithms.COUNTERCLOCKWISE };
-	staticAccessors$29.CLOCKWISE.get = function () { return CGAlgorithms.CLOCKWISE };
-	staticAccessors$29.NONE.get = function () { return CGAlgorithms.COLLINEAR };
-
-	Object.defineProperties( Angle, staticAccessors$29 );
-
-	var OffsetSegmentGenerator = function OffsetSegmentGenerator () {
-	  this._maxCurveSegmentError = 0.0;
-	  this._filletAngleQuantum = null;
-	  this._closingSegLengthFactor = 1;
-	  this._segList = null;
-	  this._distance = 0.0;
-	  this._precisionModel = null;
-	  this._bufParams = null;
-	  this._li = null;
-	  this._s0 = null;
-	  this._s1 = null;
-	  this._s2 = null;
-	  this._seg0 = new LineSegment();
-	  this._seg1 = new LineSegment();
-	  this._offset0 = new LineSegment();
-	  this._offset1 = new LineSegment();
-	  this._side = 0;
-	  this._hasNarrowConcaveAngle = false;
-	  var precisionModel = arguments[0];
-	  var bufParams = arguments[1];
-	  var distance = arguments[2];
-	  this._precisionModel = precisionModel;
-	  this._bufParams = bufParams;
-	  this._li = new RobustLineIntersector();
-	  this._filletAngleQuantum = Math.PI / 2.0 / bufParams.getQuadrantSegments();
-	  if (bufParams.getQuadrantSegments() >= 8 && bufParams.getJoinStyle() === BufferParameters.JOIN_ROUND) { this._closingSegLengthFactor = OffsetSegmentGenerator.MAX_CLOSING_SEG_LEN_FACTOR; }
-	  this.init(distance);
-	};
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	var staticAccessors$27 = { OFFSET_SEGMENT_SEPARATION_FACTOR: { configurable: true },INSIDE_TURN_VERTEX_SNAP_DISTANCE_FACTOR: { configurable: true },CURVE_VERTEX_SNAP_DISTANCE_FACTOR: { configurable: true },MAX_CLOSING_SEG_LEN_FACTOR: { configurable: true } };
-	OffsetSegmentGenerator.prototype.addNextSegment = function addNextSegment (p, addStartPoint) {
-	  this._s0 = this._s1;
-	  this._s1 = this._s2;
-	  this._s2 = p;
-	  this._seg0.setCoordinates(this._s0, this._s1);
-	  this.computeOffsetSegment(this._seg0, this._side, this._distance, this._offset0);
-	  this._seg1.setCoordinates(this._s1, this._s2);
-	  this.computeOffsetSegment(this._seg1, this._side, this._distance, this._offset1);
-	  if (this._s1.equals(this._s2)) { return null }
-	  var orientation = CGAlgorithms.computeOrientation(this._s0, this._s1, this._s2);
-	  var outsideTurn = (orientation === CGAlgorithms.CLOCKWISE && this._side === Position.LEFT) || (orientation === CGAlgorithms.COUNTERCLOCKWISE && this._side === Position.RIGHT);
-	  if (orientation === 0) {
-	    this.addCollinear(addStartPoint);
-	  } else if (outsideTurn) {
-	    this.addOutsideTurn(orientation, addStartPoint);
-	  } else {
-	    this.addInsideTurn(orientation, addStartPoint);
-	  }
-	};
-	OffsetSegmentGenerator.prototype.addLineEndCap = function addLineEndCap (p0, p1) {
-	  var seg = new LineSegment(p0, p1);
-	  var offsetL = new LineSegment();
-	  this.computeOffsetSegment(seg, Position.LEFT, this._distance, offsetL);
-	  var offsetR = new LineSegment();
-	  this.computeOffsetSegment(seg, Position.RIGHT, this._distance, offsetR);
-	  var dx = p1.x - p0.x;
-	  var dy = p1.y - p0.y;
-	  var angle = Math.atan2(dy, dx);
-	  switch (this._bufParams.getEndCapStyle()) {
-	    case BufferParameters.CAP_ROUND:
-	      this._segList.addPt(offsetL.p1);
-	      this.addFilletArc(p1, angle + Math.PI / 2, angle - Math.PI / 2, CGAlgorithms.CLOCKWISE, this._distance);
-	      this._segList.addPt(offsetR.p1);
-	      break
-	    case BufferParameters.CAP_FLAT:
-	      this._segList.addPt(offsetL.p1);
-	      this._segList.addPt(offsetR.p1);
-	      break
-	    case BufferParameters.CAP_SQUARE:
-	      var squareCapSideOffset = new Coordinate();
-	      squareCapSideOffset.x = Math.abs(this._distance) * Math.cos(angle);
-	      squareCapSideOffset.y = Math.abs(this._distance) * Math.sin(angle);
-	      var squareCapLOffset = new Coordinate(offsetL.p1.x + squareCapSideOffset.x, offsetL.p1.y + squareCapSideOffset.y);
-	      var squareCapROffset = new Coordinate(offsetR.p1.x + squareCapSideOffset.x, offsetR.p1.y + squareCapSideOffset.y);
-	      this._segList.addPt(squareCapLOffset);
-	      this._segList.addPt(squareCapROffset);
-	      break
-	  }
-	};
-	OffsetSegmentGenerator.prototype.getCoordinates = function getCoordinates () {
-	  var pts = this._segList.getCoordinates();
-	  return pts
-	};
-	OffsetSegmentGenerator.prototype.addMitreJoin = function addMitreJoin (p, offset0, offset1, distance) {
-	  var isMitreWithinLimit = true;
-	  var intPt = null;
-	  try {
-	    intPt = HCoordinate.intersection(offset0.p0, offset0.p1, offset1.p0, offset1.p1);
-	    var mitreRatio = distance <= 0.0 ? 1.0 : intPt.distance(p) / Math.abs(distance);
-	    if (mitreRatio > this._bufParams.getMitreLimit()) { isMitreWithinLimit = false; }
-	  } catch (ex) {
-	    if (ex instanceof NotRepresentableException) {
-	      intPt = new Coordinate(0, 0);
-	      isMitreWithinLimit = false;
-	    } else { throw ex }
-	  } finally {}
-	  if (isMitreWithinLimit) {
-	    this._segList.addPt(intPt);
-	  } else {
-	    this.addLimitedMitreJoin(offset0, offset1, distance, this._bufParams.getMitreLimit());
-	  }
-	};
-	OffsetSegmentGenerator.prototype.addFilletCorner = function addFilletCorner (p, p0, p1, direction, radius) {
-	  var dx0 = p0.x - p.x;
-	  var dy0 = p0.y - p.y;
-	  var startAngle = Math.atan2(dy0, dx0);
-	  var dx1 = p1.x - p.x;
-	  var dy1 = p1.y - p.y;
-	  var endAngle = Math.atan2(dy1, dx1);
-	  if (direction === CGAlgorithms.CLOCKWISE) {
-	    if (startAngle <= endAngle) { startAngle += 2.0 * Math.PI; }
-	  } else {
-	    if (startAngle >= endAngle) { startAngle -= 2.0 * Math.PI; }
-	  }
-	  this._segList.addPt(p0);
-	  this.addFilletArc(p, startAngle, endAngle, direction, radius);
-	  this._segList.addPt(p1);
-	};
-	OffsetSegmentGenerator.prototype.addOutsideTurn = function addOutsideTurn (orientation, addStartPoint) {
-	  if (this._offset0.p1.distance(this._offset1.p0) < this._distance * OffsetSegmentGenerator.OFFSET_SEGMENT_SEPARATION_FACTOR) {
-	    this._segList.addPt(this._offset0.p1);
-	    return null
-	  }
-	  if (this._bufParams.getJoinStyle() === BufferParameters.JOIN_MITRE) {
-	    this.addMitreJoin(this._s1, this._offset0, this._offset1, this._distance);
-	  } else if (this._bufParams.getJoinStyle() === BufferParameters.JOIN_BEVEL) {
-	    this.addBevelJoin(this._offset0, this._offset1);
-	  } else {
-	    if (addStartPoint) { this._segList.addPt(this._offset0.p1); }
-	    this.addFilletCorner(this._s1, this._offset0.p1, this._offset1.p0, orientation, this._distance);
-	    this._segList.addPt(this._offset1.p0);
-	  }
-	};
-	OffsetSegmentGenerator.prototype.createSquare = function createSquare (p) {
-	  this._segList.addPt(new Coordinate(p.x + this._distance, p.y + this._distance));
-	  this._segList.addPt(new Coordinate(p.x + this._distance, p.y - this._distance));
-	  this._segList.addPt(new Coordinate(p.x - this._distance, p.y - this._distance));
-	  this._segList.addPt(new Coordinate(p.x - this._distance, p.y + this._distance));
-	  this._segList.closeRing();
-	};
-	OffsetSegmentGenerator.prototype.addSegments = function addSegments (pt, isForward) {
-	  this._segList.addPts(pt, isForward);
-	};
-	OffsetSegmentGenerator.prototype.addFirstSegment = function addFirstSegment () {
-	  this._segList.addPt(this._offset1.p0);
-	};
-	OffsetSegmentGenerator.prototype.addLastSegment = function addLastSegment () {
-	  this._segList.addPt(this._offset1.p1);
-	};
-	OffsetSegmentGenerator.prototype.initSideSegments = function initSideSegments (s1, s2, side) {
-	  this._s1 = s1;
-	  this._s2 = s2;
-	  this._side = side;
-	  this._seg1.setCoordinates(s1, s2);
-	  this.computeOffsetSegment(this._seg1, side, this._distance, this._offset1);
-	};
-	OffsetSegmentGenerator.prototype.addLimitedMitreJoin = function addLimitedMitreJoin (offset0, offset1, distance, mitreLimit) {
-	  var basePt = this._seg0.p1;
-	  var ang0 = Angle.angle(basePt, this._seg0.p0);
-	  // const ang1 = Angle.angle(basePt, this._seg1.p1)
-	  var angDiff = Angle.angleBetweenOriented(this._seg0.p0, basePt, this._seg1.p1);
-	  var angDiffHalf = angDiff / 2;
-	  var midAng = Angle.normalize(ang0 + angDiffHalf);
-	  var mitreMidAng = Angle.normalize(midAng + Math.PI);
-	  var mitreDist = mitreLimit * distance;
-	  var bevelDelta = mitreDist * Math.abs(Math.sin(angDiffHalf));
-	  var bevelHalfLen = distance - bevelDelta;
-	  var bevelMidX = basePt.x + mitreDist * Math.cos(mitreMidAng);
-	  var bevelMidY = basePt.y + mitreDist * Math.sin(mitreMidAng);
-	  var bevelMidPt = new Coordinate(bevelMidX, bevelMidY);
-	  var mitreMidLine = new LineSegment(basePt, bevelMidPt);
-	  var bevelEndLeft = mitreMidLine.pointAlongOffset(1.0, bevelHalfLen);
-	  var bevelEndRight = mitreMidLine.pointAlongOffset(1.0, -bevelHalfLen);
-	  if (this._side === Position.LEFT) {
-	    this._segList.addPt(bevelEndLeft);
-	    this._segList.addPt(bevelEndRight);
-	  } else {
-	    this._segList.addPt(bevelEndRight);
-	    this._segList.addPt(bevelEndLeft);
-	  }
-	};
-	OffsetSegmentGenerator.prototype.computeOffsetSegment = function computeOffsetSegment (seg, side, distance, offset) {
-	  var sideSign = side === Position.LEFT ? 1 : -1;
-	  var dx = seg.p1.x - seg.p0.x;
-	  var dy = seg.p1.y - seg.p0.y;
-	  var len = Math.sqrt(dx * dx + dy * dy);
-	  var ux = sideSign * distance * dx / len;
-	  var uy = sideSign * distance * dy / len;
-	  offset.p0.x = seg.p0.x - uy;
-	  offset.p0.y = seg.p0.y + ux;
-	  offset.p1.x = seg.p1.x - uy;
-	  offset.p1.y = seg.p1.y + ux;
-	};
-	OffsetSegmentGenerator.prototype.addFilletArc = function addFilletArc (p, startAngle, endAngle, direction, radius) {
-	    var this$1 = this;
-
-	  var directionFactor = direction === CGAlgorithms.CLOCKWISE ? -1 : 1;
-	  var totalAngle = Math.abs(startAngle - endAngle);
-	  var nSegs = Math.trunc(totalAngle / this._filletAngleQuantum + 0.5);
-	  if (nSegs < 1) { return null }
-	  var initAngle = 0.0;
-	  var currAngleInc = totalAngle / nSegs;
-	  var currAngle = initAngle;
-	  var pt = new Coordinate();
-	  while (currAngle < totalAngle) {
-	    var angle = startAngle + directionFactor * currAngle;
-	    pt.x = p.x + radius * Math.cos(angle);
-	    pt.y = p.y + radius * Math.sin(angle);
-	    this$1._segList.addPt(pt);
-	    currAngle += currAngleInc;
-	  }
-	};
-	OffsetSegmentGenerator.prototype.addInsideTurn = function addInsideTurn (orientation, addStartPoint) {
-	  this._li.computeIntersection(this._offset0.p0, this._offset0.p1, this._offset1.p0, this._offset1.p1);
-	  if (this._li.hasIntersection()) {
-	    this._segList.addPt(this._li.getIntersection(0));
-	  } else {
-	    this._hasNarrowConcaveAngle = true;
-	    if (this._offset0.p1.distance(this._offset1.p0) < this._distance * OffsetSegmentGenerator.INSIDE_TURN_VERTEX_SNAP_DISTANCE_FACTOR) {
-	      this._segList.addPt(this._offset0.p1);
-	    } else {
-	      this._segList.addPt(this._offset0.p1);
-	      if (this._closingSegLengthFactor > 0) {
-	        var mid0 = new Coordinate((this._closingSegLengthFactor * this._offset0.p1.x + this._s1.x) / (this._closingSegLengthFactor + 1), (this._closingSegLengthFactor * this._offset0.p1.y + this._s1.y) / (this._closingSegLengthFactor + 1));
-	        this._segList.addPt(mid0);
-	        var mid1 = new Coordinate((this._closingSegLengthFactor * this._offset1.p0.x + this._s1.x) / (this._closingSegLengthFactor + 1), (this._closingSegLengthFactor * this._offset1.p0.y + this._s1.y) / (this._closingSegLengthFactor + 1));
-	        this._segList.addPt(mid1);
-	      } else {
-	        this._segList.addPt(this._s1);
-	      }
-	      this._segList.addPt(this._offset1.p0);
-	    }
-	  }
-	};
-	OffsetSegmentGenerator.prototype.createCircle = function createCircle (p) {
-	  var pt = new Coordinate(p.x + this._distance, p.y);
-	  this._segList.addPt(pt);
-	  this.addFilletArc(p, 0.0, 2.0 * Math.PI, -1, this._distance);
-	  this._segList.closeRing();
-	};
-	OffsetSegmentGenerator.prototype.addBevelJoin = function addBevelJoin (offset0, offset1) {
-	  this._segList.addPt(offset0.p1);
-	  this._segList.addPt(offset1.p0);
-	};
-	OffsetSegmentGenerator.prototype.init = function init (distance) {
-	  this._distance = distance;
-	  this._maxCurveSegmentError = distance * (1 - Math.cos(this._filletAngleQuantum / 2.0));
-	  this._segList = new OffsetSegmentString();
-	  this._segList.setPrecisionModel(this._precisionModel);
-	  this._segList.setMinimumVertexDistance(distance * OffsetSegmentGenerator.CURVE_VERTEX_SNAP_DISTANCE_FACTOR);
-	};
-	OffsetSegmentGenerator.prototype.addCollinear = function addCollinear (addStartPoint) {
-	  this._li.computeIntersection(this._s0, this._s1, this._s1, this._s2);
-	  var numInt = this._li.getIntersectionNum();
-	  if (numInt >= 2) {
-	    if (this._bufParams.getJoinStyle() === BufferParameters.JOIN_BEVEL || this._bufParams.getJoinStyle() === BufferParameters.JOIN_MITRE) {
-	      if (addStartPoint) { this._segList.addPt(this._offset0.p1); }
-	      this._segList.addPt(this._offset1.p0);
-	    } else {
-	      this.addFilletCorner(this._s1, this._offset0.p1, this._offset1.p0, CGAlgorithms.CLOCKWISE, this._distance);
-	    }
-	  }
-	};
-	OffsetSegmentGenerator.prototype.closeRing = function closeRing () {
-	  this._segList.closeRing();
-	};
-	OffsetSegmentGenerator.prototype.hasNarrowConcaveAngle = function hasNarrowConcaveAngle () {
-	  return this._hasNarrowConcaveAngle
-	};
-	OffsetSegmentGenerator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetSegmentGenerator.prototype.getClass = function getClass () {
-	  return OffsetSegmentGenerator
-	};
-	staticAccessors$27.OFFSET_SEGMENT_SEPARATION_FACTOR.get = function () { return 1.0E-3 };
-	staticAccessors$27.INSIDE_TURN_VERTEX_SNAP_DISTANCE_FACTOR.get = function () { return 1.0E-3 };
-	staticAccessors$27.CURVE_VERTEX_SNAP_DISTANCE_FACTOR.get = function () { return 1.0E-6 };
-	staticAccessors$27.MAX_CLOSING_SEG_LEN_FACTOR.get = function () { return 80 };
-
-	Object.defineProperties( OffsetSegmentGenerator, staticAccessors$27 );
-
-	var OffsetCurveBuilder = function OffsetCurveBuilder () {
-	  this._distance = 0.0;
-	  this._precisionModel = null;
-	  this._bufParams = null;
-	  var precisionModel = arguments[0];
-	  var bufParams = arguments[1];
-	  this._precisionModel = precisionModel;
-	  this._bufParams = bufParams;
-	};
-	OffsetCurveBuilder.prototype.getOffsetCurve = function getOffsetCurve (inputPts, distance) {
-	  this._distance = distance;
-	  if (distance === 0.0) { return null }
-	  var isRightSide = distance < 0.0;
-	  var posDistance = Math.abs(distance);
-	  var segGen = this.getSegGen(posDistance);
-	  if (inputPts.length <= 1) {
-	    this.computePointCurve(inputPts[0], segGen);
-	  } else {
-	    this.computeOffsetCurve(inputPts, isRightSide, segGen);
-	  }
-	  var curvePts = segGen.getCoordinates();
-	  if (isRightSide) { CoordinateArrays.reverse(curvePts); }
-	  return curvePts
-	};
-	OffsetCurveBuilder.prototype.computeSingleSidedBufferCurve = function computeSingleSidedBufferCurve (inputPts, isRightSide, segGen) {
-	  var distTol = this.simplifyTolerance(this._distance);
-	  if (isRightSide) {
-	    segGen.addSegments(inputPts, true);
-	    var simp2 = BufferInputLineSimplifier.simplify(inputPts, -distTol);
-	    var n2 = simp2.length - 1;
-	    segGen.initSideSegments(simp2[n2], simp2[n2 - 1], Position.LEFT);
-	    segGen.addFirstSegment();
-	    for (var i = n2 - 2; i >= 0; i--) {
-	      segGen.addNextSegment(simp2[i], true);
-	    }
-	  } else {
-	    segGen.addSegments(inputPts, false);
-	    var simp1 = BufferInputLineSimplifier.simplify(inputPts, distTol);
-	    var n1 = simp1.length - 1;
-	    segGen.initSideSegments(simp1[0], simp1[1], Position.LEFT);
-	    segGen.addFirstSegment();
-	    for (var i$1 = 2; i$1 <= n1; i$1++) {
-	      segGen.addNextSegment(simp1[i$1], true);
-	    }
-	  }
-	  segGen.addLastSegment();
-	  segGen.closeRing();
-	};
-	OffsetCurveBuilder.prototype.computeRingBufferCurve = function computeRingBufferCurve (inputPts, side, segGen) {
-	  var distTol = this.simplifyTolerance(this._distance);
-	  if (side === Position.RIGHT) { distTol = -distTol; }
-	  var simp = BufferInputLineSimplifier.simplify(inputPts, distTol);
-	  var n = simp.length - 1;
-	  segGen.initSideSegments(simp[n - 1], simp[0], side);
-	  for (var i = 1; i <= n; i++) {
-	    var addStartPoint = i !== 1;
-	    segGen.addNextSegment(simp[i], addStartPoint);
-	  }
-	  segGen.closeRing();
-	};
-	OffsetCurveBuilder.prototype.computeLineBufferCurve = function computeLineBufferCurve (inputPts, segGen) {
-	  var distTol = this.simplifyTolerance(this._distance);
-	  var simp1 = BufferInputLineSimplifier.simplify(inputPts, distTol);
-	  var n1 = simp1.length - 1;
-	  segGen.initSideSegments(simp1[0], simp1[1], Position.LEFT);
-	  for (var i = 2; i <= n1; i++) {
-	    segGen.addNextSegment(simp1[i], true);
-	  }
-	  segGen.addLastSegment();
-	  segGen.addLineEndCap(simp1[n1 - 1], simp1[n1]);
-	  var simp2 = BufferInputLineSimplifier.simplify(inputPts, -distTol);
-	  var n2 = simp2.length - 1;
-	  segGen.initSideSegments(simp2[n2], simp2[n2 - 1], Position.LEFT);
-	  for (var i$1 = n2 - 2; i$1 >= 0; i$1--) {
-	    segGen.addNextSegment(simp2[i$1], true);
-	  }
-	  segGen.addLastSegment();
-	  segGen.addLineEndCap(simp2[1], simp2[0]);
-	  segGen.closeRing();
-	};
-	OffsetCurveBuilder.prototype.computePointCurve = function computePointCurve (pt, segGen) {
-	  switch (this._bufParams.getEndCapStyle()) {
-	    case BufferParameters.CAP_ROUND:
-	      segGen.createCircle(pt);
-	      break
-	    case BufferParameters.CAP_SQUARE:
-	      segGen.createSquare(pt);
-	      break
-	  }
-	};
-	OffsetCurveBuilder.prototype.getLineCurve = function getLineCurve (inputPts, distance) {
-	  this._distance = distance;
-	  if (distance < 0.0 && !this._bufParams.isSingleSided()) { return null }
-	  if (distance === 0.0) { return null }
-	  var posDistance = Math.abs(distance);
-	  var segGen = this.getSegGen(posDistance);
-	  if (inputPts.length <= 1) {
-	    this.computePointCurve(inputPts[0], segGen);
-	  } else {
-	    if (this._bufParams.isSingleSided()) {
-	      var isRightSide = distance < 0.0;
-	      this.computeSingleSidedBufferCurve(inputPts, isRightSide, segGen);
-	    } else { this.computeLineBufferCurve(inputPts, segGen); }
-	  }
-	  var lineCoord = segGen.getCoordinates();
-	  return lineCoord
-	};
-	OffsetCurveBuilder.prototype.getBufferParameters = function getBufferParameters () {
-	  return this._bufParams
-	};
-	OffsetCurveBuilder.prototype.simplifyTolerance = function simplifyTolerance (bufDistance) {
-	  return bufDistance * this._bufParams.getSimplifyFactor()
-	};
-	OffsetCurveBuilder.prototype.getRingCurve = function getRingCurve (inputPts, side, distance) {
-	  this._distance = distance;
-	  if (inputPts.length <= 2) { return this.getLineCurve(inputPts, distance) }
-	  if (distance === 0.0) {
-	    return OffsetCurveBuilder.copyCoordinates(inputPts)
-	  }
-	  var segGen = this.getSegGen(distance);
-	  this.computeRingBufferCurve(inputPts, side, segGen);
-	  return segGen.getCoordinates()
-	};
-	OffsetCurveBuilder.prototype.computeOffsetCurve = function computeOffsetCurve (inputPts, isRightSide, segGen) {
-	  var distTol = this.simplifyTolerance(this._distance);
-	  if (isRightSide) {
-	    var simp2 = BufferInputLineSimplifier.simplify(inputPts, -distTol);
-	    var n2 = simp2.length - 1;
-	    segGen.initSideSegments(simp2[n2], simp2[n2 - 1], Position.LEFT);
-	    segGen.addFirstSegment();
-	    for (var i = n2 - 2; i >= 0; i--) {
-	      segGen.addNextSegment(simp2[i], true);
-	    }
-	  } else {
-	    var simp1 = BufferInputLineSimplifier.simplify(inputPts, distTol);
-	    var n1 = simp1.length - 1;
-	    segGen.initSideSegments(simp1[0], simp1[1], Position.LEFT);
-	    segGen.addFirstSegment();
-	    for (var i$1 = 2; i$1 <= n1; i$1++) {
-	      segGen.addNextSegment(simp1[i$1], true);
-	    }
-	  }
-	  segGen.addLastSegment();
-	};
-	OffsetCurveBuilder.prototype.getSegGen = function getSegGen (distance) {
-	  return new OffsetSegmentGenerator(this._precisionModel, this._bufParams, distance)
-	};
-	OffsetCurveBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetCurveBuilder.prototype.getClass = function getClass () {
-	  return OffsetCurveBuilder
-	};
-	OffsetCurveBuilder.copyCoordinates = function copyCoordinates (pts) {
-	  var copy = new Array(pts.length).fill(null);
-	  for (var i = 0; i < copy.length; i++) {
-	    copy[i] = new Coordinate(pts[i]);
-	  }
-	  return copy
-	};
 
-	var SubgraphDepthLocater = function SubgraphDepthLocater () {
-	  this._subgraphs = null;
-	  this._seg = new LineSegment();
-	  this._cga = new CGAlgorithms();
-	  var subgraphs = arguments[0];
-	  this._subgraphs = subgraphs;
-	};
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	var staticAccessors$30 = { DepthSegment: { configurable: true } };
-	SubgraphDepthLocater.prototype.findStabbedSegments = function findStabbedSegments () {
-	    var this$1 = this;
+	          return this;
+	        };
+	        /* private methods */
 
-	  if (arguments.length === 1) {
-	    var stabbingRayLeftPt = arguments[0];
-	    var stabbedSegments = new ArrayList();
-	    for (var i = this._subgraphs.iterator(); i.hasNext();) {
-	      var bsg = i.next();
-	      var env = bsg.getEnvelope();
-	      if (stabbingRayLeftPt.y < env.getMinY() || stabbingRayLeftPt.y > env.getMaxY()) { continue }
-	      this$1.findStabbedSegments(stabbingRayLeftPt, bsg.getDirectedEdges(), stabbedSegments);
-	    }
-	    return stabbedSegments
-	  } else if (arguments.length === 3) {
-	    if (hasInterface(arguments[2], List) && (arguments[0] instanceof Coordinate && arguments[1] instanceof DirectedEdge)) {
-	      var stabbingRayLeftPt$1 = arguments[0];
-	      var dirEdge = arguments[1];
-	      var stabbedSegments$1 = arguments[2];
-	      var pts = dirEdge.getEdge().getCoordinates();
-	      for (var i$1 = 0; i$1 < pts.length - 1; i$1++) {
-	        this$1._seg.p0 = pts[i$1];
-	        this$1._seg.p1 = pts[i$1 + 1];
-	        if (this$1._seg.p0.y > this$1._seg.p1.y) { this$1._seg.reverse(); }
-	        var maxx = Math.max(this$1._seg.p0.x, this$1._seg.p1.x);
-	        if (maxx < stabbingRayLeftPt$1.x) { continue }
-	        if (this$1._seg.isHorizontal()) { continue }
-	        if (stabbingRayLeftPt$1.y < this$1._seg.p0.y || stabbingRayLeftPt$1.y > this$1._seg.p1.y) { continue }
-	        if (CGAlgorithms.computeOrientation(this$1._seg.p0, this$1._seg.p1, stabbingRayLeftPt$1) === CGAlgorithms.RIGHT) { continue }
-	        var depth = dirEdge.getDepth(Position.LEFT);
-	        if (!this$1._seg.p0.equals(pts[i$1])) { depth = dirEdge.getDepth(Position.RIGHT); }
-	        var ds = new DepthSegment(this$1._seg, depth);
-	        stabbedSegments$1.add(ds);
-	      }
-	    } else if (hasInterface(arguments[2], List) && (arguments[0] instanceof Coordinate && hasInterface(arguments[1], List))) {
-	      var stabbingRayLeftPt$2 = arguments[0];
-	      var dirEdges = arguments[1];
-	      var stabbedSegments$2 = arguments[2];
-	      for (var i$2 = dirEdges.iterator(); i$2.hasNext();) {
-	        var de = i$2.next();
-	        if (!de.isForward()) { continue }
-	        this$1.findStabbedSegments(stabbingRayLeftPt$2, de, stabbedSegments$2);
-	      }
-	    }
-	  }
-	};
-	SubgraphDepthLocater.prototype.getDepth = function getDepth (p) {
-	  var stabbedSegments = this.findStabbedSegments(p);
-	  if (stabbedSegments.size() === 0) { return 0 }
-	  var ds = Collections.min(stabbedSegments);
-	  return ds._leftDepth
-	};
-	SubgraphDepthLocater.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SubgraphDepthLocater.prototype.getClass = function getClass () {
-	  return SubgraphDepthLocater
-	};
-	staticAccessors$30.DepthSegment.get = function () { return DepthSegment };
+	        /**
+	         * Calculate the SHA-512 of a raw string
+	         */
 
-	Object.defineProperties( SubgraphDepthLocater, staticAccessors$30 );
 
-	var DepthSegment = function DepthSegment () {
-	  this._upwardSeg = null;
-	  this._leftDepth = null;
-	  var seg = arguments[0];
-	  var depth = arguments[1];
-	  this._upwardSeg = new LineSegment(seg);
-	  this._leftDepth = depth;
-	};
-	DepthSegment.prototype.compareTo = function compareTo (obj) {
-	  var other = obj;
-	  if (this._upwardSeg.minX() >= other._upwardSeg.maxX()) { return 1 }
-	  if (this._upwardSeg.maxX() <= other._upwardSeg.minX()) { return -1 }
-	  var orientIndex = this._upwardSeg.orientationIndex(other._upwardSeg);
-	  if (orientIndex !== 0) { return orientIndex }
-	  orientIndex = -1 * other._upwardSeg.orientationIndex(this._upwardSeg);
-	  if (orientIndex !== 0) { return orientIndex }
-	  return this._upwardSeg.compareTo(other._upwardSeg)
-	};
-	DepthSegment.prototype.compareX = function compareX (seg0, seg1) {
-	  var compare0 = seg0.p0.compareTo(seg1.p0);
-	  if (compare0 !== 0) { return compare0 }
-	  return seg0.p1.compareTo(seg1.p1)
-	};
-	DepthSegment.prototype.toString = function toString () {
-	  return this._upwardSeg.toString()
-	};
-	DepthSegment.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	DepthSegment.prototype.getClass = function getClass () {
-	  return DepthSegment
-	};
+	        function rstr(s) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binb2rstr(binb(rstr2binb(s), s.length * 8));
+	        }
+	        /*
+	         * Calculate the HMAC-SHA-512 of a key and some data (raw strings)
+	         */
 
-	var Triangle = function Triangle (p0, p1, p2) {
-	  this.p0 = p0 || null;
-	  this.p1 = p1 || null;
-	  this.p2 = p2 || null;
-	};
-	Triangle.prototype.area = function area () {
-	  return Triangle.area(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.signedArea = function signedArea () {
-	  return Triangle.signedArea(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.interpolateZ = function interpolateZ (p) {
-	  if (p === null) { throw new IllegalArgumentException('Supplied point is null.') }
-	  return Triangle.interpolateZ(p, this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.longestSideLength = function longestSideLength () {
-	  return Triangle.longestSideLength(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.isAcute = function isAcute () {
-	  return Triangle.isAcute(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.circumcentre = function circumcentre () {
-	  return Triangle.circumcentre(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.area3D = function area3D () {
-	  return Triangle.area3D(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.centroid = function centroid () {
-	  return Triangle.centroid(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.inCentre = function inCentre () {
-	  return Triangle.inCentre(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Triangle.prototype.getClass = function getClass () {
-	  return Triangle
-	};
-	Triangle.area = function area (a, b, c) {
-	  return Math.abs(((c.x - a.x) * (b.y - a.y) - (b.x - a.x) * (c.y - a.y)) / 2)
-	};
-	Triangle.signedArea = function signedArea (a, b, c) {
-	  return ((c.x - a.x) * (b.y - a.y) - (b.x - a.x) * (c.y - a.y)) / 2
-	};
-	Triangle.det = function det (m00, m01, m10, m11) {
-	  return m00 * m11 - m01 * m10
-	};
-	Triangle.interpolateZ = function interpolateZ (p, v0, v1, v2) {
-	  var x0 = v0.x;
-	  var y0 = v0.y;
-	  var a = v1.x - x0;
-	  var b = v2.x - x0;
-	  var c = v1.y - y0;
-	  var d = v2.y - y0;
-	  var det = a * d - b * c;
-	  var dx = p.x - x0;
-	  var dy = p.y - y0;
-	  var t = (d * dx - b * dy) / det;
-	  var u = (-c * dx + a * dy) / det;
-	  var z = v0.z + t * (v1.z - v0.z) + u * (v2.z - v0.z);
-	  return z
-	};
-	Triangle.longestSideLength = function longestSideLength (a, b, c) {
-	  var lenAB = a.distance(b);
-	  var lenBC = b.distance(c);
-	  var lenCA = c.distance(a);
-	  var maxLen = lenAB;
-	  if (lenBC > maxLen) { maxLen = lenBC; }
-	  if (lenCA > maxLen) { maxLen = lenCA; }
-	  return maxLen
-	};
-	Triangle.isAcute = function isAcute (a, b, c) {
-	  if (!Angle.isAcute(a, b, c)) { return false }
-	  if (!Angle.isAcute(b, c, a)) { return false }
-	  if (!Angle.isAcute(c, a, b)) { return false }
-	  return true
-	};
-	Triangle.circumcentre = function circumcentre (a, b, c) {
-	  var cx = c.x;
-	  var cy = c.y;
-	  var ax = a.x - cx;
-	  var ay = a.y - cy;
-	  var bx = b.x - cx;
-	  var by = b.y - cy;
-	  var denom = 2 * Triangle.det(ax, ay, bx, by);
-	  var numx = Triangle.det(ay, ax * ax + ay * ay, by, bx * bx + by * by);
-	  var numy = Triangle.det(ax, ax * ax + ay * ay, bx, bx * bx + by * by);
-	  var ccx = cx - numx / denom;
-	  var ccy = cy + numy / denom;
-	  return new Coordinate(ccx, ccy)
-	};
-	Triangle.perpendicularBisector = function perpendicularBisector (a, b) {
-	  var dx = b.x - a.x;
-	  var dy = b.y - a.y;
-	  var l1 = new HCoordinate(a.x + dx / 2.0, a.y + dy / 2.0, 1.0);
-	  var l2 = new HCoordinate(a.x - dy + dx / 2.0, a.y + dx + dy / 2.0, 1.0);
-	  return new HCoordinate(l1, l2)
-	};
-	Triangle.angleBisector = function angleBisector (a, b, c) {
-	  var len0 = b.distance(a);
-	  var len2 = b.distance(c);
-	  var frac = len0 / (len0 + len2);
-	  var dx = c.x - a.x;
-	  var dy = c.y - a.y;
-	  var splitPt = new Coordinate(a.x + frac * dx, a.y + frac * dy);
-	  return splitPt
-	};
-	Triangle.area3D = function area3D (a, b, c) {
-	  var ux = b.x - a.x;
-	  var uy = b.y - a.y;
-	  var uz = b.z - a.z;
-	  var vx = c.x - a.x;
-	  var vy = c.y - a.y;
-	  var vz = c.z - a.z;
-	  var crossx = uy * vz - uz * vy;
-	  var crossy = uz * vx - ux * vz;
-	  var crossz = ux * vy - uy * vx;
-	  var absSq = crossx * crossx + crossy * crossy + crossz * crossz;
-	  var area3D = Math.sqrt(absSq) / 2;
-	  return area3D
-	};
-	Triangle.centroid = function centroid (a, b, c) {
-	  var x = (a.x + b.x + c.x) / 3;
-	  var y = (a.y + b.y + c.y) / 3;
-	  return new Coordinate(x, y)
-	};
-	Triangle.inCentre = function inCentre (a, b, c) {
-	  var len0 = b.distance(c);
-	  var len1 = a.distance(c);
-	  var len2 = a.distance(b);
-	  var circum = len0 + len1 + len2;
-	  var inCentreX = (len0 * a.x + len1 * b.x + len2 * c.x) / circum;
-	  var inCentreY = (len0 * a.y + len1 * b.y + len2 * c.y) / circum;
-	  return new Coordinate(inCentreX, inCentreY)
-	};
 
-	var OffsetCurveSetBuilder = function OffsetCurveSetBuilder () {
-	  this._inputGeom = null;
-	  this._distance = null;
-	  this._curveBuilder = null;
-	  this._curveList = new ArrayList();
-	  var inputGeom = arguments[0];
-	  var distance = arguments[1];
-	  var curveBuilder = arguments[2];
-	  this._inputGeom = inputGeom;
-	  this._distance = distance;
-	  this._curveBuilder = curveBuilder;
-	};
-	OffsetCurveSetBuilder.prototype.addPoint = function addPoint (p) {
-	  if (this._distance <= 0.0) { return null }
-	  var coord = p.getCoordinates();
-	  var curve = this._curveBuilder.getLineCurve(coord, this._distance);
-	  this.addCurve(curve, Location.EXTERIOR, Location.INTERIOR);
-	};
-	OffsetCurveSetBuilder.prototype.addPolygon = function addPolygon (p) {
-	    var this$1 = this;
-
-	  var offsetDistance = this._distance;
-	  var offsetSide = Position.LEFT;
-	  if (this._distance < 0.0) {
-	    offsetDistance = -this._distance;
-	    offsetSide = Position.RIGHT;
-	  }
-	  var shell = p.getExteriorRing();
-	  var shellCoord = CoordinateArrays.removeRepeatedPoints(shell.getCoordinates());
-	  if (this._distance < 0.0 && this.isErodedCompletely(shell, this._distance)) { return null }
-	  if (this._distance <= 0.0 && shellCoord.length < 3) { return null }
-	  this.addPolygonRing(shellCoord, offsetDistance, offsetSide, Location.EXTERIOR, Location.INTERIOR);
-	  for (var i = 0; i < p.getNumInteriorRing(); i++) {
-	    var hole = p.getInteriorRingN(i);
-	    var holeCoord = CoordinateArrays.removeRepeatedPoints(hole.getCoordinates());
-	    if (this$1._distance > 0.0 && this$1.isErodedCompletely(hole, -this$1._distance)) { continue }
-	    this$1.addPolygonRing(holeCoord, offsetDistance, Position.opposite(offsetSide), Location.INTERIOR, Location.EXTERIOR);
-	  }
-	};
-	OffsetCurveSetBuilder.prototype.isTriangleErodedCompletely = function isTriangleErodedCompletely (triangleCoord, bufferDistance) {
-	  var tri = new Triangle(triangleCoord[0], triangleCoord[1], triangleCoord[2]);
-	  var inCentre = tri.inCentre();
-	  var distToCentre = CGAlgorithms.distancePointLine(inCentre, tri.p0, tri.p1);
-	  return distToCentre < Math.abs(bufferDistance)
-	};
-	OffsetCurveSetBuilder.prototype.addLineString = function addLineString (line) {
-	  if (this._distance <= 0.0 && !this._curveBuilder.getBufferParameters().isSingleSided()) { return null }
-	  var coord = CoordinateArrays.removeRepeatedPoints(line.getCoordinates());
-	  var curve = this._curveBuilder.getLineCurve(coord, this._distance);
-	  this.addCurve(curve, Location.EXTERIOR, Location.INTERIOR);
-	};
-	OffsetCurveSetBuilder.prototype.addCurve = function addCurve (coord, leftLoc, rightLoc) {
-	  if (coord === null || coord.length < 2) { return null }
-	  var e = new NodedSegmentString(coord, new Label(0, Location.BOUNDARY, leftLoc, rightLoc));
-	  this._curveList.add(e);
-	};
-	OffsetCurveSetBuilder.prototype.getCurves = function getCurves () {
-	  this.add(this._inputGeom);
-	  return this._curveList
-	};
-	OffsetCurveSetBuilder.prototype.addPolygonRing = function addPolygonRing (coord, offsetDistance, side, cwLeftLoc, cwRightLoc) {
-	  if (offsetDistance === 0.0 && coord.length < LinearRing.MINIMUM_VALID_SIZE) { return null }
-	  var leftLoc = cwLeftLoc;
-	  var rightLoc = cwRightLoc;
-	  if (coord.length >= LinearRing.MINIMUM_VALID_SIZE && CGAlgorithms.isCCW(coord)) {
-	    leftLoc = cwRightLoc;
-	    rightLoc = cwLeftLoc;
-	    side = Position.opposite(side);
-	  }
-	  var curve = this._curveBuilder.getRingCurve(coord, side, offsetDistance);
-	  this.addCurve(curve, leftLoc, rightLoc);
-	};
-	OffsetCurveSetBuilder.prototype.add = function add (g) {
-	  if (g.isEmpty()) { return null }
-	  if (g instanceof Polygon) { this.addPolygon(g); }
-	  else if (g instanceof LineString) { this.addLineString(g); }
-	  else if (g instanceof Point$1) { this.addPoint(g); }
-	  else if (g instanceof MultiPoint) { this.addCollection(g); }
-	  else if (g instanceof MultiLineString) { this.addCollection(g); }
-	  else if (g instanceof MultiPolygon) { this.addCollection(g); }
-	  else if (g instanceof GeometryCollection) { this.addCollection(g); }
-	  // else throw new UnsupportedOperationException(g.getClass().getName())
-	};
-	OffsetCurveSetBuilder.prototype.isErodedCompletely = function isErodedCompletely (ring, bufferDistance) {
-	  var ringCoord = ring.getCoordinates();
-	  // const minDiam = 0.0
-	  if (ringCoord.length < 4) { return bufferDistance < 0 }
-	  if (ringCoord.length === 4) { return this.isTriangleErodedCompletely(ringCoord, bufferDistance) }
-	  var env = ring.getEnvelopeInternal();
-	  var envMinDimension = Math.min(env.getHeight(), env.getWidth());
-	  if (bufferDistance < 0.0 && 2 * Math.abs(bufferDistance) > envMinDimension) { return true }
-	  return false
-	};
-	OffsetCurveSetBuilder.prototype.addCollection = function addCollection (gc) {
-	    var this$1 = this;
+	        function rstr_hmac(key, data) {
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          var hash,
+	              i = 0,
+	              bkey = rstr2binb(key),
+	              ipad = Array(32),
+	              opad = Array(32);
 
-	  for (var i = 0; i < gc.getNumGeometries(); i++) {
-	    var g = gc.getGeometryN(i);
-	    this$1.add(g);
-	  }
-	};
-	OffsetCurveSetBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetCurveSetBuilder.prototype.getClass = function getClass () {
-	  return OffsetCurveSetBuilder
-	};
+	          if (bkey.length > 32) {
+	            bkey = binb(bkey, key.length * 8);
+	          }
 
-	var PointOnGeometryLocator = function PointOnGeometryLocator () {};
+	          for (; i < 32; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	PointOnGeometryLocator.prototype.locate = function locate (p) {};
-	PointOnGeometryLocator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointOnGeometryLocator.prototype.getClass = function getClass () {
-	  return PointOnGeometryLocator
-	};
+	          hash = binb(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
+	          return binb2rstr(binb(opad.concat(hash), 1024 + 512));
+	        }
+	        /**
+	         * Calculate the SHA-512 of an array of big-endian dwords, and a bit length
+	         */
+
+
+	        function binb(x, len) {
+	          var j,
+	              i,
+	              l,
+	              W = new Array(80),
+	              hash = new Array(16),
+	              //Initial hash values
+	          H = [new int64(0x6a09e667, -205731576), new int64(-1150833019, -2067093701), new int64(0x3c6ef372, -23791573), new int64(-1521486534, 0x5f1d36f1), new int64(0x510e527f, -1377402159), new int64(-1694144372, 0x2b3e6c1f), new int64(0x1f83d9ab, -79577749), new int64(0x5be0cd19, 0x137e2179)],
+	              T1 = new int64(0, 0),
+	              T2 = new int64(0, 0),
+	              a = new int64(0, 0),
+	              b = new int64(0, 0),
+	              c = new int64(0, 0),
+	              d = new int64(0, 0),
+	              e = new int64(0, 0),
+	              f = new int64(0, 0),
+	              g = new int64(0, 0),
+	              h = new int64(0, 0),
+	              //Temporary variables not specified by the document
+	          s0 = new int64(0, 0),
+	              s1 = new int64(0, 0),
+	              Ch = new int64(0, 0),
+	              Maj = new int64(0, 0),
+	              r1 = new int64(0, 0),
+	              r2 = new int64(0, 0),
+	              r3 = new int64(0, 0);
+
+	          if (sha512_k === undefined) {
+	            //SHA512 constants
+	            sha512_k = [new int64(0x428a2f98, -685199838), new int64(0x71374491, 0x23ef65cd), new int64(-1245643825, -330482897), new int64(-373957723, -2121671748), new int64(0x3956c25b, -213338824), new int64(0x59f111f1, -1241133031), new int64(-1841331548, -1357295717), new int64(-1424204075, -630357736), new int64(-670586216, -1560083902), new int64(0x12835b01, 0x45706fbe), new int64(0x243185be, 0x4ee4b28c), new int64(0x550c7dc3, -704662302), new int64(0x72be5d74, -226784913), new int64(-2132889090, 0x3b1696b1), new int64(-1680079193, 0x25c71235), new int64(-1046744716, -815192428), new int64(-459576895, -1628353838), new int64(-272742522, 0x384f25e3), new int64(0xfc19dc6, -1953704523), new int64(0x240ca1cc, 0x77ac9c65), new int64(0x2de92c6f, 0x592b0275), new int64(0x4a7484aa, 0x6ea6e483), new int64(0x5cb0a9dc, -1119749164), new int64(0x76f988da, -2096016459), new int64(-1740746414, -295247957), new int64(-1473132947, 0x2db43210), new int64(-1341970488, -1728372417), new int64(-1084653625, -1091629340), new int64(-958395405, 0x3da88fc2), new int64(-710438585, -1828018395), new int64(0x6ca6351, -536640913), new int64(0x14292967, 0xa0e6e70), new int64(0x27b70a85, 0x46d22ffc), new int64(0x2e1b2138, 0x5c26c926), new int64(0x4d2c6dfc, 0x5ac42aed), new int64(0x53380d13, -1651133473), new int64(0x650a7354, -1951439906), new int64(0x766a0abb, 0x3c77b2a8), new int64(-2117940946, 0x47edaee6), new int64(-1838011259, 0x1482353b), new int64(-1564481375, 0x4cf10364), new int64(-1474664885, -1136513023), new int64(-1035236496, -789014639), new int64(-949202525, 0x654be30), new int64(-778901479, -688958952), new int64(-694614492, 0x5565a910), new int64(-200395387, 0x5771202a), new int64(0x106aa070, 0x32bbd1b8), new int64(0x19a4c116, -1194143544), new int64(0x1e376c08, 0x5141ab53), new int64(0x2748774c, -544281703), new int64(0x34b0bcb5, -509917016), new int64(0x391c0cb3, -976659869), new int64(0x4ed8aa4a, -482243893), new int64(0x5b9cca4f, 0x7763e373), new int64(0x682e6ff3, -692930397), new int64(0x748f82ee, 0x5defb2fc), new int64(0x78a5636f, 0x43172f60), new int64(-2067236844, -1578062990), new int64(-1933114872, 0x1a6439ec), new int64(-1866530822, 0x23631e28), new int64(-1538233109, -561857047), new int64(-1090935817, -1295615723), new int64(-965641998, -479046869), new int64(-903397682, -366583396), new int64(-779700025, 0x21c0c207), new int64(-354779690, -840897762), new int64(-176337025, -294727304), new int64(0x6f067aa, 0x72176fba), new int64(0xa637dc5, -1563912026), new int64(0x113f9804, -1090974290), new int64(0x1b710b35, 0x131c471b), new int64(0x28db77f5, 0x23047d84), new int64(0x32caab7b, 0x40c72493), new int64(0x3c9ebe0a, 0x15c9bebc), new int64(0x431d67c4, -1676669620), new int64(0x4cc5d4be, -885112138), new int64(0x597f299c, -60457430), new int64(0x5fcb6fab, 0x3ad6faec), new int64(0x6c44198c, 0x4a475817)];
+	          }
 
-	var GeometryCollectionIterator = function GeometryCollectionIterator () {
-	  this._parent = null;
-	  this._atStart = null;
-	  this._max = null;
-	  this._index = null;
-	  this._subcollectionIterator = null;
-	  var parent = arguments[0];
-	  this._parent = parent;
-	  this._atStart = true;
-	  this._index = 0;
-	  this._max = parent.getNumGeometries();
-	};
-	GeometryCollectionIterator.prototype.next = function next () {
-	  if (this._atStart) {
-	    this._atStart = false;
-	    if (GeometryCollectionIterator.isAtomic(this._parent)) { this._index++; }
-	    return this._parent
-	  }
-	  if (this._subcollectionIterator !== null) {
-	    if (this._subcollectionIterator.hasNext()) {
-	      return this._subcollectionIterator.next()
-	    } else {
-	      this._subcollectionIterator = null;
-	    }
-	  }
-	  if (this._index >= this._max) {
-	    throw new NoSuchElementException()
-	  }
-	  var obj = this._parent.getGeometryN(this._index++);
-	  if (obj instanceof GeometryCollection) {
-	    this._subcollectionIterator = new GeometryCollectionIterator(obj);
-	    return this._subcollectionIterator.next()
-	  }
-	  return obj
-	};
-	GeometryCollectionIterator.prototype.remove = function remove () {
-	  throw new Error(this.getClass().getName())
-	};
-	GeometryCollectionIterator.prototype.hasNext = function hasNext () {
-	  if (this._atStart) {
-	    return true
-	  }
-	  if (this._subcollectionIterator !== null) {
-	    if (this._subcollectionIterator.hasNext()) {
-	      return true
-	    }
-	    this._subcollectionIterator = null;
-	  }
-	  if (this._index >= this._max) {
-	    return false
-	  }
-	  return true
-	};
-	GeometryCollectionIterator.prototype.interfaces_ = function interfaces_ () {
-	  return [Iterator$1]
-	};
-	GeometryCollectionIterator.prototype.getClass = function getClass () {
-	  return GeometryCollectionIterator
-	};
-	GeometryCollectionIterator.isAtomic = function isAtomic (geom) {
-	  return !(geom instanceof GeometryCollection)
-	};
+	          for (i = 0; i < 80; i += 1) {
+	            W[i] = new int64(0, 0);
+	          } // append padding to the source string. The format is described in the FIPS.
+
+
+	          x[len >> 5] |= 0x80 << 24 - (len & 0x1f);
+	          x[(len + 128 >> 10 << 5) + 31] = len;
+	          l = x.length;
+
+	          for (i = 0; i < l; i += 32) {
+	            //32 dwords is the block size
+	            int64copy(a, H[0]);
+	            int64copy(b, H[1]);
+	            int64copy(c, H[2]);
+	            int64copy(d, H[3]);
+	            int64copy(e, H[4]);
+	            int64copy(f, H[5]);
+	            int64copy(g, H[6]);
+	            int64copy(h, H[7]);
+
+	            for (j = 0; j < 16; j += 1) {
+	              W[j].h = x[i + 2 * j];
+	              W[j].l = x[i + 2 * j + 1];
+	            }
+
+	            for (j = 16; j < 80; j += 1) {
+	              //sigma1
+	              int64rrot(r1, W[j - 2], 19);
+	              int64revrrot(r2, W[j - 2], 29);
+	              int64shr(r3, W[j - 2], 6);
+	              s1.l = r1.l ^ r2.l ^ r3.l;
+	              s1.h = r1.h ^ r2.h ^ r3.h; //sigma0
+
+	              int64rrot(r1, W[j - 15], 1);
+	              int64rrot(r2, W[j - 15], 8);
+	              int64shr(r3, W[j - 15], 7);
+	              s0.l = r1.l ^ r2.l ^ r3.l;
+	              s0.h = r1.h ^ r2.h ^ r3.h;
+	              int64add4(W[j], s1, W[j - 7], s0, W[j - 16]);
+	            }
+
+	            for (j = 0; j < 80; j += 1) {
+	              //Ch
+	              Ch.l = e.l & f.l ^ ~e.l & g.l;
+	              Ch.h = e.h & f.h ^ ~e.h & g.h; //Sigma1
+
+	              int64rrot(r1, e, 14);
+	              int64rrot(r2, e, 18);
+	              int64revrrot(r3, e, 9);
+	              s1.l = r1.l ^ r2.l ^ r3.l;
+	              s1.h = r1.h ^ r2.h ^ r3.h; //Sigma0
+
+	              int64rrot(r1, a, 28);
+	              int64revrrot(r2, a, 2);
+	              int64revrrot(r3, a, 7);
+	              s0.l = r1.l ^ r2.l ^ r3.l;
+	              s0.h = r1.h ^ r2.h ^ r3.h; //Maj
+
+	              Maj.l = a.l & b.l ^ a.l & c.l ^ b.l & c.l;
+	              Maj.h = a.h & b.h ^ a.h & c.h ^ b.h & c.h;
+	              int64add5(T1, h, s1, Ch, sha512_k[j], W[j]);
+	              int64add(T2, s0, Maj);
+	              int64copy(h, g);
+	              int64copy(g, f);
+	              int64copy(f, e);
+	              int64add(e, d, T1);
+	              int64copy(d, c);
+	              int64copy(c, b);
+	              int64copy(b, a);
+	              int64add(a, T1, T2);
+	            }
+
+	            int64add(H[0], H[0], a);
+	            int64add(H[1], H[1], b);
+	            int64add(H[2], H[2], c);
+	            int64add(H[3], H[3], d);
+	            int64add(H[4], H[4], e);
+	            int64add(H[5], H[5], f);
+	            int64add(H[6], H[6], g);
+	            int64add(H[7], H[7], h);
+	          } //represent the hash as an array of 32-bit dwords
+
+
+	          for (i = 0; i < 8; i += 1) {
+	            hash[2 * i] = H[i].h;
+	            hash[2 * i + 1] = H[i].l;
+	          }
 
-	var SimplePointInAreaLocator = function SimplePointInAreaLocator () {
-	  this._geom = null;
-	  var geom = arguments[0];
-	  this._geom = geom;
-	};
-	SimplePointInAreaLocator.prototype.locate = function locate (p) {
-	  return SimplePointInAreaLocator.locate(p, this._geom)
-	};
-	SimplePointInAreaLocator.prototype.interfaces_ = function interfaces_ () {
-	  return [PointOnGeometryLocator]
-	};
-	SimplePointInAreaLocator.prototype.getClass = function getClass () {
-	  return SimplePointInAreaLocator
-	};
-	SimplePointInAreaLocator.isPointInRing = function isPointInRing (p, ring) {
-	  if (!ring.getEnvelopeInternal().intersects(p)) { return false }
-	  return CGAlgorithms.isPointInRing(p, ring.getCoordinates())
-	};
-	SimplePointInAreaLocator.containsPointInPolygon = function containsPointInPolygon (p, poly) {
-	  if (poly.isEmpty()) { return false }
-	  var shell = poly.getExteriorRing();
-	  if (!SimplePointInAreaLocator.isPointInRing(p, shell)) { return false }
-	  for (var i = 0; i < poly.getNumInteriorRing(); i++) {
-	    var hole = poly.getInteriorRingN(i);
-	    if (SimplePointInAreaLocator.isPointInRing(p, hole)) { return false }
-	  }
-	  return true
-	};
-	SimplePointInAreaLocator.containsPoint = function containsPoint (p, geom) {
-	  if (geom instanceof Polygon) {
-	    return SimplePointInAreaLocator.containsPointInPolygon(p, geom)
-	  } else if (geom instanceof GeometryCollection) {
-	    var geomi = new GeometryCollectionIterator(geom);
-	    while (geomi.hasNext()) {
-	      var g2 = geomi.next();
-	      if (g2 !== geom) { if (SimplePointInAreaLocator.containsPoint(p, g2)) { return true } }
-	    }
-	  }
-	  return false
-	};
-	SimplePointInAreaLocator.locate = function locate (p, geom) {
-	  if (geom.isEmpty()) { return Location.EXTERIOR }
-	  if (SimplePointInAreaLocator.containsPoint(p, geom)) { return Location.INTERIOR }
-	  return Location.EXTERIOR
-	};
+	          return hash;
+	        } //A constructor for 64-bit numbers
 
-	var EdgeEndStar = function EdgeEndStar () {
-	  this._edgeMap = new TreeMap();
-	  this._edgeList = null;
-	  this._ptInAreaLocation = [Location.NONE, Location.NONE];
-	};
-	EdgeEndStar.prototype.getNextCW = function getNextCW (ee) {
-	  this.getEdges();
-	  var i = this._edgeList.indexOf(ee);
-	  var iNextCW = i - 1;
-	  if (i === 0) { iNextCW = this._edgeList.size() - 1; }
-	  return this._edgeList.get(iNextCW)
-	};
-	EdgeEndStar.prototype.propagateSideLabels = function propagateSideLabels (geomIndex) {
-	  var startLoc = Location.NONE;
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    var label = e.getLabel();
-	    if (label.isArea(geomIndex) && label.getLocation(geomIndex, Position.LEFT) !== Location.NONE) { startLoc = label.getLocation(geomIndex, Position.LEFT); }
-	  }
-	  if (startLoc === Location.NONE) { return null }
-	  var currLoc = startLoc;
-	  for (var it$1 = this.iterator(); it$1.hasNext();) {
-	    var e$1 = it$1.next();
-	    var label$1 = e$1.getLabel();
-	    if (label$1.getLocation(geomIndex, Position.ON) === Location.NONE) { label$1.setLocation(geomIndex, Position.ON, currLoc); }
-	    if (label$1.isArea(geomIndex)) {
-	      var leftLoc = label$1.getLocation(geomIndex, Position.LEFT);
-	      var rightLoc = label$1.getLocation(geomIndex, Position.RIGHT);
-	      if (rightLoc !== Location.NONE) {
-	        if (rightLoc !== currLoc) { throw new TopologyException('side location conflict', e$1.getCoordinate()) }
-	        if (leftLoc === Location.NONE) {
-	          Assert.shouldNeverReachHere('found single null side (at ' + e$1.getCoordinate() + ')');
-	        }
-	        currLoc = leftLoc;
-	      } else {
-	        Assert.isTrue(label$1.getLocation(geomIndex, Position.LEFT) === Location.NONE, 'found single null side');
-	        label$1.setLocation(geomIndex, Position.RIGHT, currLoc);
-	        label$1.setLocation(geomIndex, Position.LEFT, currLoc);
-	      }
-	    }
-	  }
-	};
-	EdgeEndStar.prototype.getCoordinate = function getCoordinate () {
-	  var it = this.iterator();
-	  if (!it.hasNext()) { return null }
-	  var e = it.next();
-	  return e.getCoordinate()
-	};
-	EdgeEndStar.prototype.print = function print (out) {
-	  System.out.println('EdgeEndStar:   ' + this.getCoordinate());
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    e.print(out);
-	  }
-	};
-	EdgeEndStar.prototype.isAreaLabelsConsistent = function isAreaLabelsConsistent (geomGraph) {
-	  this.computeEdgeEndLabels(geomGraph.getBoundaryNodeRule());
-	  return this.checkAreaLabelsConsistent(0)
-	};
-	EdgeEndStar.prototype.checkAreaLabelsConsistent = function checkAreaLabelsConsistent (geomIndex) {
-	  var edges = this.getEdges();
-	  if (edges.size() <= 0) { return true }
-	  var lastEdgeIndex = edges.size() - 1;
-	  var startLabel = edges.get(lastEdgeIndex).getLabel();
-	  var startLoc = startLabel.getLocation(geomIndex, Position.LEFT);
-	  Assert.isTrue(startLoc !== Location.NONE, 'Found unlabelled area edge');
-	  var currLoc = startLoc;
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    var label = e.getLabel();
-	    Assert.isTrue(label.isArea(geomIndex), 'Found non-area edge');
-	    var leftLoc = label.getLocation(geomIndex, Position.LEFT);
-	    var rightLoc = label.getLocation(geomIndex, Position.RIGHT);
-	    if (leftLoc === rightLoc) {
-	      return false
-	    }
-	    if (rightLoc !== currLoc) {
-	      return false
-	    }
-	    currLoc = leftLoc;
-	  }
-	  return true
-	};
-	EdgeEndStar.prototype.findIndex = function findIndex (eSearch) {
-	    var this$1 = this;
 
-	  this.iterator();
-	  for (var i = 0; i < this._edgeList.size(); i++) {
-	    var e = this$1._edgeList.get(i);
-	    if (e === eSearch) { return i }
-	  }
-	  return -1
-	};
-	EdgeEndStar.prototype.iterator = function iterator () {
-	  return this.getEdges().iterator()
-	};
-	EdgeEndStar.prototype.getEdges = function getEdges () {
-	  if (this._edgeList === null) {
-	    this._edgeList = new ArrayList(this._edgeMap.values());
-	  }
-	  return this._edgeList
-	};
-	EdgeEndStar.prototype.getLocation = function getLocation (geomIndex, p, geom) {
-	  if (this._ptInAreaLocation[geomIndex] === Location.NONE) {
-	    this._ptInAreaLocation[geomIndex] = SimplePointInAreaLocator.locate(p, geom[geomIndex].getGeometry());
-	  }
-	  return this._ptInAreaLocation[geomIndex]
-	};
-	EdgeEndStar.prototype.toString = function toString () {
-	  var buf = new StringBuffer();
-	  buf.append('EdgeEndStar:   ' + this.getCoordinate());
-	  buf.append('\n');
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    buf.append(e);
-	    buf.append('\n');
-	  }
-	  return buf.toString()
-	};
-	EdgeEndStar.prototype.computeEdgeEndLabels = function computeEdgeEndLabels (boundaryNodeRule) {
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var ee = it.next();
-	    ee.computeLabel(boundaryNodeRule);
-	  }
-	};
-	EdgeEndStar.prototype.computeLabelling = function computeLabelling (geomGraph) {
-	    var this$1 = this;
-
-	  this.computeEdgeEndLabels(geomGraph[0].getBoundaryNodeRule());
-	  this.propagateSideLabels(0);
-	  this.propagateSideLabels(1);
-	  var hasDimensionalCollapseEdge = [false, false];
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    var label = e.getLabel();
-	    for (var geomi = 0; geomi < 2; geomi++) {
-	      if (label.isLine(geomi) && label.getLocation(geomi) === Location.BOUNDARY) { hasDimensionalCollapseEdge[geomi] = true; }
-	    }
-	  }
-	  for (var it$1 = this.iterator(); it$1.hasNext();) {
-	    var e$1 = it$1.next();
-	    var label$1 = e$1.getLabel();
-	    for (var geomi$1 = 0; geomi$1 < 2; geomi$1++) {
-	      if (label$1.isAnyNull(geomi$1)) {
-	        var loc = Location.NONE;
-	        if (hasDimensionalCollapseEdge[geomi$1]) {
-	          loc = Location.EXTERIOR;
-	        } else {
-	          var p = e$1.getCoordinate();
-	          loc = this$1.getLocation(geomi$1, p, geomGraph);
-	        }
-	        label$1.setAllLocationsIfNull(geomi$1, loc);
-	      }
-	    }
-	  }
-	};
-	EdgeEndStar.prototype.getDegree = function getDegree () {
-	  return this._edgeMap.size()
-	};
-	EdgeEndStar.prototype.insertEdgeEnd = function insertEdgeEnd (e, obj) {
-	  this._edgeMap.put(e, obj);
-	  this._edgeList = null;
-	};
-	EdgeEndStar.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeEndStar.prototype.getClass = function getClass () {
-	  return EdgeEndStar
-	};
+	        function int64(h, l) {
+	          this.h = h;
+	          this.l = l; //this.toString = int64toString;
+	        } //Copies src into dst, assuming both are 64-bit numbers
 
-	var DirectedEdgeStar = (function (EdgeEndStar$$1) {
-	  function DirectedEdgeStar () {
-	    EdgeEndStar$$1.call(this);
-	    this._resultAreaEdgeList = null;
-	    this._label = null;
-	    this._SCANNING_FOR_INCOMING = 1;
-	    this._LINKING_TO_OUTGOING = 2;
-	  }
-
-	  if ( EdgeEndStar$$1 ) { DirectedEdgeStar.__proto__ = EdgeEndStar$$1; }
-	  DirectedEdgeStar.prototype = Object.create( EdgeEndStar$$1 && EdgeEndStar$$1.prototype );
-	  DirectedEdgeStar.prototype.constructor = DirectedEdgeStar;
-	  DirectedEdgeStar.prototype.linkResultDirectedEdges = function linkResultDirectedEdges () {
-	    var this$1 = this;
-
-	    this.getResultAreaEdges();
-	    var firstOut = null;
-	    var incoming = null;
-	    var state = this._SCANNING_FOR_INCOMING;
-	    for (var i = 0; i < this._resultAreaEdgeList.size(); i++) {
-	      var nextOut = this$1._resultAreaEdgeList.get(i);
-	      var nextIn = nextOut.getSym();
-	      if (!nextOut.getLabel().isArea()) { continue }
-	      if (firstOut === null && nextOut.isInResult()) { firstOut = nextOut; }
-	      switch (state) {
-	        case this$1._SCANNING_FOR_INCOMING:
-	          if (!nextIn.isInResult()) { continue }
-	          incoming = nextIn;
-	          state = this$1._LINKING_TO_OUTGOING;
-	          break
-	        case this$1._LINKING_TO_OUTGOING:
-	          if (!nextOut.isInResult()) { continue }
-	          incoming.setNext(nextOut);
-	          state = this$1._SCANNING_FOR_INCOMING;
-	          break
-	      }
-	    }
-	    if (state === this._LINKING_TO_OUTGOING) {
-	      if (firstOut === null) { throw new TopologyException('no outgoing dirEdge found', this.getCoordinate()) }
-	      Assert.isTrue(firstOut.isInResult(), 'unable to link last incoming dirEdge');
-	      incoming.setNext(firstOut);
-	    }
-	  };
-	  DirectedEdgeStar.prototype.insert = function insert (ee) {
-	    var de = ee;
-	    this.insertEdgeEnd(de, de);
-	  };
-	  DirectedEdgeStar.prototype.getRightmostEdge = function getRightmostEdge () {
-	    var edges = this.getEdges();
-	    var size = edges.size();
-	    if (size < 1) { return null }
-	    var de0 = edges.get(0);
-	    if (size === 1) { return de0 }
-	    var deLast = edges.get(size - 1);
-	    var quad0 = de0.getQuadrant();
-	    var quad1 = deLast.getQuadrant();
-	    if (Quadrant.isNorthern(quad0) && Quadrant.isNorthern(quad1)) { return de0; } else if (!Quadrant.isNorthern(quad0) && !Quadrant.isNorthern(quad1)) { return deLast; } else {
-	      // const nonHorizontalEdge = null
-	      if (de0.getDy() !== 0) { return de0; } else if (deLast.getDy() !== 0) { return deLast }
-	    }
-	    Assert.shouldNeverReachHere('found two horizontal edges incident on node');
-	    return null
-	  };
-	  DirectedEdgeStar.prototype.print = function print (out) {
-	    System.out.println('DirectedEdgeStar: ' + this.getCoordinate());
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var de = it.next();
-	      out.print('out ');
-	      de.print(out);
-	      out.println();
-	      out.print('in ');
-	      de.getSym().print(out);
-	      out.println();
-	    }
-	  };
-	  DirectedEdgeStar.prototype.getResultAreaEdges = function getResultAreaEdges () {
-	    var this$1 = this;
-
-	    if (this._resultAreaEdgeList !== null) { return this._resultAreaEdgeList }
-	    this._resultAreaEdgeList = new ArrayList();
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var de = it.next();
-	      if (de.isInResult() || de.getSym().isInResult()) { this$1._resultAreaEdgeList.add(de); }
-	    }
-	    return this._resultAreaEdgeList
-	  };
-	  DirectedEdgeStar.prototype.updateLabelling = function updateLabelling (nodeLabel) {
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var de = it.next();
-	      var label = de.getLabel();
-	      label.setAllLocationsIfNull(0, nodeLabel.getLocation(0));
-	      label.setAllLocationsIfNull(1, nodeLabel.getLocation(1));
-	    }
-	  };
-	  DirectedEdgeStar.prototype.linkAllDirectedEdges = function linkAllDirectedEdges () {
-	    var this$1 = this;
-
-	    this.getEdges();
-	    var prevOut = null;
-	    var firstIn = null;
-	    for (var i = this._edgeList.size() - 1; i >= 0; i--) {
-	      var nextOut = this$1._edgeList.get(i);
-	      var nextIn = nextOut.getSym();
-	      if (firstIn === null) { firstIn = nextIn; }
-	      if (prevOut !== null) { nextIn.setNext(prevOut); }
-	      prevOut = nextOut;
-	    }
-	    firstIn.setNext(prevOut);
-	  };
-	  DirectedEdgeStar.prototype.computeDepths = function computeDepths () {
-	    var this$1 = this;
-
-	    if (arguments.length === 1) {
-	      var de = arguments[0];
-	      var edgeIndex = this.findIndex(de);
-	      // const label = de.getLabel()
-	      var startDepth = de.getDepth(Position.LEFT);
-	      var targetLastDepth = de.getDepth(Position.RIGHT);
-	      var nextDepth = this.computeDepths(edgeIndex + 1, this._edgeList.size(), startDepth);
-	      var lastDepth = this.computeDepths(0, edgeIndex, nextDepth);
-	      if (lastDepth !== targetLastDepth) { throw new TopologyException('depth mismatch at ' + de.getCoordinate()) }
-	    } else if (arguments.length === 3) {
-	      var startIndex = arguments[0];
-	      var endIndex = arguments[1];
-	      var startDepth$1 = arguments[2];
-	      var currDepth = startDepth$1;
-	      for (var i = startIndex; i < endIndex; i++) {
-	        var nextDe = this$1._edgeList.get(i);
-	        // const label = nextDe.getLabel()
-	        nextDe.setEdgeDepths(Position.RIGHT, currDepth);
-	        currDepth = nextDe.getDepth(Position.LEFT);
-	      }
-	      return currDepth
-	    }
-	  };
-	  DirectedEdgeStar.prototype.mergeSymLabels = function mergeSymLabels () {
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var de = it.next();
-	      var label = de.getLabel();
-	      label.merge(de.getSym().getLabel());
-	    }
-	  };
-	  DirectedEdgeStar.prototype.linkMinimalDirectedEdges = function linkMinimalDirectedEdges (er) {
-	    var this$1 = this;
-
-	    var firstOut = null;
-	    var incoming = null;
-	    var state = this._SCANNING_FOR_INCOMING;
-	    for (var i = this._resultAreaEdgeList.size() - 1; i >= 0; i--) {
-	      var nextOut = this$1._resultAreaEdgeList.get(i);
-	      var nextIn = nextOut.getSym();
-	      if (firstOut === null && nextOut.getEdgeRing() === er) { firstOut = nextOut; }
-	      switch (state) {
-	        case this$1._SCANNING_FOR_INCOMING:
-	          if (nextIn.getEdgeRing() !== er) { continue }
-	          incoming = nextIn;
-	          state = this$1._LINKING_TO_OUTGOING;
-	          break
-	        case this$1._LINKING_TO_OUTGOING:
-	          if (nextOut.getEdgeRing() !== er) { continue }
-	          incoming.setNextMin(nextOut);
-	          state = this$1._SCANNING_FOR_INCOMING;
-	          break
-	      }
-	    }
-	    if (state === this._LINKING_TO_OUTGOING) {
-	      Assert.isTrue(firstOut !== null, 'found null for first outgoing dirEdge');
-	      Assert.isTrue(firstOut.getEdgeRing() === er, 'unable to link last incoming dirEdge');
-	      incoming.setNextMin(firstOut);
-	    }
-	  };
-	  DirectedEdgeStar.prototype.getOutgoingDegree = function getOutgoingDegree () {
-	    if (arguments.length === 0) {
-	      var degree = 0;
-	      for (var it = this.iterator(); it.hasNext();) {
-	        var de = it.next();
-	        if (de.isInResult()) { degree++; }
-	      }
-	      return degree
-	    } else if (arguments.length === 1) {
-	      var er = arguments[0];
-	      var degree$1 = 0;
-	      for (var it$1 = this.iterator(); it$1.hasNext();) {
-	        var de$1 = it$1.next();
-	        if (de$1.getEdgeRing() === er) { degree$1++; }
-	      }
-	      return degree$1
-	    }
-	  };
-	  DirectedEdgeStar.prototype.getLabel = function getLabel () {
-	    return this._label
-	  };
-	  DirectedEdgeStar.prototype.findCoveredLineEdges = function findCoveredLineEdges () {
-	    var startLoc = Location.NONE;
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var nextOut = it.next();
-	      var nextIn = nextOut.getSym();
-	      if (!nextOut.isLineEdge()) {
-	        if (nextOut.isInResult()) {
-	          startLoc = Location.INTERIOR;
-	          break
-	        }
-	        if (nextIn.isInResult()) {
-	          startLoc = Location.EXTERIOR;
-	          break
-	        }
-	      }
-	    }
-	    if (startLoc === Location.NONE) { return null }
-	    var currLoc = startLoc;
-	    for (var it$1 = this.iterator(); it$1.hasNext();) {
-	      var nextOut$1 = it$1.next();
-	      var nextIn$1 = nextOut$1.getSym();
-	      if (nextOut$1.isLineEdge()) {
-	        nextOut$1.getEdge().setCovered(currLoc === Location.INTERIOR);
-	      } else {
-	        if (nextOut$1.isInResult()) { currLoc = Location.EXTERIOR; }
-	        if (nextIn$1.isInResult()) { currLoc = Location.INTERIOR; }
-	      }
-	    }
-	  };
-	  DirectedEdgeStar.prototype.computeLabelling = function computeLabelling (geom) {
-	    var this$1 = this;
 
-	    EdgeEndStar$$1.prototype.computeLabelling.call(this, geom);
-	    this._label = new Label(Location.NONE);
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var ee = it.next();
-	      var e = ee.getEdge();
-	      var eLabel = e.getLabel();
-	      for (var i = 0; i < 2; i++) {
-	        var eLoc = eLabel.getLocation(i);
-	        if (eLoc === Location.INTERIOR || eLoc === Location.BOUNDARY) { this$1._label.setLocation(i, Location.INTERIOR); }
-	      }
-	    }
-	  };
-	  DirectedEdgeStar.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  DirectedEdgeStar.prototype.getClass = function getClass () {
-	    return DirectedEdgeStar
-	  };
+	        function int64copy(dst, src) {
+	          dst.h = src.h;
+	          dst.l = src.l;
+	        } //Right-rotates a 64-bit number by shift
+	        //Won't handle cases of shift>=32
+	        //The function revrrot() is for that
 
-	  return DirectedEdgeStar;
-	}(EdgeEndStar));
 
-	var OverlayNodeFactory = (function (NodeFactory$$1) {
-	  function OverlayNodeFactory () {
-	    NodeFactory$$1.apply(this, arguments);
-	  }
+	        function int64rrot(dst, x, shift) {
+	          dst.l = x.l >>> shift | x.h << 32 - shift;
+	          dst.h = x.h >>> shift | x.l << 32 - shift;
+	        } //Reverses the dwords of the source and then rotates right by shift.
+	        //This is equivalent to rotation by 32+shift
 
-	  if ( NodeFactory$$1 ) { OverlayNodeFactory.__proto__ = NodeFactory$$1; }
-	  OverlayNodeFactory.prototype = Object.create( NodeFactory$$1 && NodeFactory$$1.prototype );
-	  OverlayNodeFactory.prototype.constructor = OverlayNodeFactory;
 
-	  OverlayNodeFactory.prototype.createNode = function createNode (coord) {
-	    return new Node$1(coord, new DirectedEdgeStar())
-	  };
-	  OverlayNodeFactory.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  OverlayNodeFactory.prototype.getClass = function getClass () {
-	    return OverlayNodeFactory
-	  };
+	        function int64revrrot(dst, x, shift) {
+	          dst.l = x.h >>> shift | x.l << 32 - shift;
+	          dst.h = x.l >>> shift | x.h << 32 - shift;
+	        } //Bitwise-shifts right a 64-bit number by shift
+	        //Won't handle shift>=32, but it's never needed in SHA512
 
-	  return OverlayNodeFactory;
-	}(NodeFactory));
 
-	var OrientedCoordinateArray = function OrientedCoordinateArray () {
-	  this._pts = null;
-	  this._orientation = null;
-	  var pts = arguments[0];
-	  this._pts = pts;
-	  this._orientation = OrientedCoordinateArray.orientation(pts);
-	};
-	OrientedCoordinateArray.prototype.compareTo = function compareTo (o1) {
-	  var oca = o1;
-	  var comp = OrientedCoordinateArray.compareOriented(this._pts, this._orientation, oca._pts, oca._orientation);
-	  return comp
-	};
-	OrientedCoordinateArray.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	OrientedCoordinateArray.prototype.getClass = function getClass () {
-	  return OrientedCoordinateArray
-	};
-	OrientedCoordinateArray.orientation = function orientation (pts) {
-	  return CoordinateArrays.increasingDirection(pts) === 1
-	};
-	OrientedCoordinateArray.compareOriented = function compareOriented (pts1, orientation1, pts2, orientation2) {
-	  var dir1 = orientation1 ? 1 : -1;
-	  var dir2 = orientation2 ? 1 : -1;
-	  var limit1 = orientation1 ? pts1.length : -1;
-	  var limit2 = orientation2 ? pts2.length : -1;
-	  var i1 = orientation1 ? 0 : pts1.length - 1;
-	  var i2 = orientation2 ? 0 : pts2.length - 1;
-	  // const comp = 0
-	  while (true) {
-	    var compPt = pts1[i1].compareTo(pts2[i2]);
-	    if (compPt !== 0) { return compPt }
-	    i1 += dir1;
-	    i2 += dir2;
-	    var done1 = i1 === limit1;
-	    var done2 = i2 === limit2;
-	    if (done1 && !done2) { return -1 }
-	    if (!done1 && done2) { return 1 }
-	    if (done1 && done2) { return 0 }
-	  }
-	};
+	        function int64shr(dst, x, shift) {
+	          dst.l = x.l >>> shift | x.h << 32 - shift;
+	          dst.h = x.h >>> shift;
+	        } //Adds two 64-bit numbers
+	        //Like the original implementation, does not rely on 32-bit operations
 
-	var EdgeList = function EdgeList () {
-	  this._edges = new ArrayList();
-	  this._ocaMap = new TreeMap();
-	};
-	EdgeList.prototype.print = function print (out) {
-	    var this$1 = this;
-
-	  out.print('MULTILINESTRING ( ');
-	  for (var j = 0; j < this._edges.size(); j++) {
-	    var e = this$1._edges.get(j);
-	    if (j > 0) { out.print(','); }
-	    out.print('(');
-	    var pts = e.getCoordinates();
-	    for (var i = 0; i < pts.length; i++) {
-	      if (i > 0) { out.print(','); }
-	      out.print(pts[i].x + ' ' + pts[i].y);
-	    }
-	    out.println(')');
-	  }
-	  out.print(')  ');
-	};
-	EdgeList.prototype.addAll = function addAll (edgeColl) {
-	    var this$1 = this;
 
-	  for (var i = edgeColl.iterator(); i.hasNext();) {
-	    this$1.add(i.next());
-	  }
-	};
-	EdgeList.prototype.findEdgeIndex = function findEdgeIndex (e) {
-	    var this$1 = this;
+	        function int64add(dst, x, y) {
+	          var w0 = (x.l & 0xffff) + (y.l & 0xffff);
+	          var w1 = (x.l >>> 16) + (y.l >>> 16) + (w0 >>> 16);
+	          var w2 = (x.h & 0xffff) + (y.h & 0xffff) + (w1 >>> 16);
+	          var w3 = (x.h >>> 16) + (y.h >>> 16) + (w2 >>> 16);
+	          dst.l = w0 & 0xffff | w1 << 16;
+	          dst.h = w2 & 0xffff | w3 << 16;
+	        } //Same, except with 4 addends. Works faster than adding them one by one.
 
-	  for (var i = 0; i < this._edges.size(); i++) {
-	    if (this$1._edges.get(i).equals(e)) { return i }
-	  }
-	  return -1
-	};
-	EdgeList.prototype.iterator = function iterator () {
-	  return this._edges.iterator()
-	};
-	EdgeList.prototype.getEdges = function getEdges () {
-	  return this._edges
-	};
-	EdgeList.prototype.get = function get (i) {
-	  return this._edges.get(i)
-	};
-	EdgeList.prototype.findEqualEdge = function findEqualEdge (e) {
-	  var oca = new OrientedCoordinateArray(e.getCoordinates());
-	  var matchEdge = this._ocaMap.get(oca);
-	  return matchEdge
-	};
-	EdgeList.prototype.add = function add (e) {
-	  this._edges.add(e);
-	  var oca = new OrientedCoordinateArray(e.getCoordinates());
-	  this._ocaMap.put(oca, e);
-	};
-	EdgeList.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeList.prototype.getClass = function getClass () {
-	  return EdgeList
-	};
 
-	var SegmentIntersector = function SegmentIntersector () {};
+	        function int64add4(dst, a, b, c, d) {
+	          var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff);
+	          var w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (w0 >>> 16);
+	          var w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (w1 >>> 16);
+	          var w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (w2 >>> 16);
+	          dst.l = w0 & 0xffff | w1 << 16;
+	          dst.h = w2 & 0xffff | w3 << 16;
+	        } //Same, except with 5 addends
 
-	SegmentIntersector.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {};
-	SegmentIntersector.prototype.isDone = function isDone () {};
-	SegmentIntersector.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SegmentIntersector.prototype.getClass = function getClass () {
-	  return SegmentIntersector
-	};
 
-	var IntersectionAdder = function IntersectionAdder () {
-	  this._hasIntersection = false;
-	  this._hasProper = false;
-	  this._hasProperInterior = false;
-	  this._hasInterior = false;
-	  this._properIntersectionPoint = null;
-	  this._li = null;
-	  this._isSelfIntersection = null;
-	  this.numIntersections = 0;
-	  this.numInteriorIntersections = 0;
-	  this.numProperIntersections = 0;
-	  this.numTests = 0;
-	  var li = arguments[0];
-	  this._li = li;
-	};
-	IntersectionAdder.prototype.isTrivialIntersection = function isTrivialIntersection (e0, segIndex0, e1, segIndex1) {
-	  if (e0 === e1) {
-	    if (this._li.getIntersectionNum() === 1) {
-	      if (IntersectionAdder.isAdjacentSegments(segIndex0, segIndex1)) { return true }
-	      if (e0.isClosed()) {
-	        var maxSegIndex = e0.size() - 1;
-	        if ((segIndex0 === 0 && segIndex1 === maxSegIndex) ||
-	            (segIndex1 === 0 && segIndex0 === maxSegIndex)) {
-	          return true
+	        function int64add5(dst, a, b, c, d, e) {
+	          var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff) + (e.l & 0xffff),
+	              w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (e.l >>> 16) + (w0 >>> 16),
+	              w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (e.h & 0xffff) + (w1 >>> 16),
+	              w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (e.h >>> 16) + (w2 >>> 16);
+	          dst.l = w0 & 0xffff | w1 << 16;
+	          dst.h = w2 & 0xffff | w3 << 16;
 	        }
-	      }
-	    }
-	  }
-	  return false
-	};
-	IntersectionAdder.prototype.getProperIntersectionPoint = function getProperIntersectionPoint () {
-	  return this._properIntersectionPoint
-	};
-	IntersectionAdder.prototype.hasProperInteriorIntersection = function hasProperInteriorIntersection () {
-	  return this._hasProperInterior
-	};
-	IntersectionAdder.prototype.getLineIntersector = function getLineIntersector () {
-	  return this._li
-	};
-	IntersectionAdder.prototype.hasProperIntersection = function hasProperIntersection () {
-	  return this._hasProper
-	};
-	IntersectionAdder.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {
-	  if (e0 === e1 && segIndex0 === segIndex1) { return null }
-	  this.numTests++;
-	  var p00 = e0.getCoordinates()[segIndex0];
-	  var p01 = e0.getCoordinates()[segIndex0 + 1];
-	  var p10 = e1.getCoordinates()[segIndex1];
-	  var p11 = e1.getCoordinates()[segIndex1 + 1];
-	  this._li.computeIntersection(p00, p01, p10, p11);
-	  if (this._li.hasIntersection()) {
-	    this.numIntersections++;
-	    if (this._li.isInteriorIntersection()) {
-	      this.numInteriorIntersections++;
-	      this._hasInterior = true;
-	    }
-	    if (!this.isTrivialIntersection(e0, segIndex0, e1, segIndex1)) {
-	      this._hasIntersection = true;
-	      e0.addIntersections(this._li, segIndex0, 0);
-	      e1.addIntersections(this._li, segIndex1, 1);
-	      if (this._li.isProper()) {
-	        this.numProperIntersections++;
-	        this._hasProper = true;
-	        this._hasProperInterior = true;
-	      }
-	    }
-	  }
-	};
-	IntersectionAdder.prototype.hasIntersection = function hasIntersection () {
-	  return this._hasIntersection
-	};
-	IntersectionAdder.prototype.isDone = function isDone () {
-	  return false
-	};
-	IntersectionAdder.prototype.hasInteriorIntersection = function hasInteriorIntersection () {
-	  return this._hasInterior
-	};
-	IntersectionAdder.prototype.interfaces_ = function interfaces_ () {
-	  return [SegmentIntersector]
-	};
-	IntersectionAdder.prototype.getClass = function getClass () {
-	  return IntersectionAdder
-	};
-	IntersectionAdder.isAdjacentSegments = function isAdjacentSegments (i1, i2) {
-	  return Math.abs(i1 - i2) === 1
-	};
+	      },
 
-	var EdgeIntersection = function EdgeIntersection () {
-	  this.coord = null;
-	  this.segmentIndex = null;
-	  this.dist = null;
-	  var coord = arguments[0];
-	  var segmentIndex = arguments[1];
-	  var dist = arguments[2];
-	  this.coord = new Coordinate(coord);
-	  this.segmentIndex = segmentIndex;
-	  this.dist = dist;
-	};
-	EdgeIntersection.prototype.getSegmentIndex = function getSegmentIndex () {
-	  return this.segmentIndex
-	};
-	EdgeIntersection.prototype.getCoordinate = function getCoordinate () {
-	  return this.coord
-	};
-	EdgeIntersection.prototype.print = function print (out) {
-	  out.print(this.coord);
-	  out.print(' seg # = ' + this.segmentIndex);
-	  out.println(' dist = ' + this.dist);
-	};
-	EdgeIntersection.prototype.compareTo = function compareTo (obj) {
-	  var other = obj;
-	  return this.compare(other.segmentIndex, other.dist)
-	};
-	EdgeIntersection.prototype.isEndPoint = function isEndPoint (maxSegmentIndex) {
-	  if (this.segmentIndex === 0 && this.dist === 0.0) { return true }
-	  if (this.segmentIndex === maxSegmentIndex) { return true }
-	  return false
-	};
-	EdgeIntersection.prototype.toString = function toString () {
-	  return this.coord + ' seg # = ' + this.segmentIndex + ' dist = ' + this.dist
-	};
-	EdgeIntersection.prototype.getDistance = function getDistance () {
-	  return this.dist
-	};
-	EdgeIntersection.prototype.compare = function compare (segmentIndex, dist) {
-	  if (this.segmentIndex < segmentIndex) { return -1 }
-	  if (this.segmentIndex > segmentIndex) { return 1 }
-	  if (this.dist < dist) { return -1 }
-	  if (this.dist > dist) { return 1 }
-	  return 0
-	};
-	EdgeIntersection.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	EdgeIntersection.prototype.getClass = function getClass () {
-	  return EdgeIntersection
-	};
+	      /**
+	       * @class Hashes.RMD160
+	       * @constructor
+	       * @param {Object} [config]
+	       *
+	       * A JavaScript implementation of the RIPEMD-160 Algorithm
+	       * Version 2.2 Copyright Jeremy Lin, Paul Johnston 2000 - 2009.
+	       * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+	       * See http://pajhome.org.uk/crypt/md5 for details.
+	       * Also http://www.ocf.berkeley.edu/~jjlin/jsotp/
+	       */
+	      RMD160: function RMD160(options) {
+	        /**
+	         * Private properties configuration variables. You may need to tweak these to be compatible with
+	         * the server-side, but the defaults work in most cases.
+	         * @see this.setUpperCase() method
+	         * @see this.setPad() method
+	         */
+	        options && typeof options.uppercase === 'boolean' ? options.uppercase : false;
+
+	        var /* hexadecimal output case format. false - lowercase; true - uppercase  */
+	        b64pad = options && typeof options.pad === 'string' ? options.pa : '=',
 
-	var EdgeIntersectionList = function EdgeIntersectionList () {
-	  this._nodeMap = new TreeMap();
-	  this.edge = null;
-	  var edge = arguments[0];
-	  this.edge = edge;
-	};
-	EdgeIntersectionList.prototype.print = function print (out) {
-	  out.println('Intersections:');
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var ei = it.next();
-	    ei.print(out);
-	  }
-	};
-	EdgeIntersectionList.prototype.iterator = function iterator () {
-	  return this._nodeMap.values().iterator()
-	};
-	EdgeIntersectionList.prototype.addSplitEdges = function addSplitEdges (edgeList) {
-	    var this$1 = this;
-
-	  this.addEndpoints();
-	  var it = this.iterator();
-	  var eiPrev = it.next();
-	  while (it.hasNext()) {
-	    var ei = it.next();
-	    var newEdge = this$1.createSplitEdge(eiPrev, ei);
-	    edgeList.add(newEdge);
-	    eiPrev = ei;
-	  }
-	};
-	EdgeIntersectionList.prototype.addEndpoints = function addEndpoints () {
-	  var maxSegIndex = this.edge.pts.length - 1;
-	  this.add(this.edge.pts[0], 0, 0.0);
-	  this.add(this.edge.pts[maxSegIndex], maxSegIndex, 0.0);
-	};
-	EdgeIntersectionList.prototype.createSplitEdge = function createSplitEdge (ei0, ei1) {
-	    var this$1 = this;
-
-	  var npts = ei1.segmentIndex - ei0.segmentIndex + 2;
-	  var lastSegStartPt = this.edge.pts[ei1.segmentIndex];
-	  var useIntPt1 = ei1.dist > 0.0 || !ei1.coord.equals2D(lastSegStartPt);
-	  if (!useIntPt1) {
-	    npts--;
-	  }
-	  var pts = new Array(npts).fill(null);
-	  var ipt = 0;
-	  pts[ipt++] = new Coordinate(ei0.coord);
-	  for (var i = ei0.segmentIndex + 1; i <= ei1.segmentIndex; i++) {
-	    pts[ipt++] = this$1.edge.pts[i];
-	  }
-	  if (useIntPt1) { pts[ipt] = ei1.coord; }
-	  return new Edge(pts, new Label(this.edge._label))
-	};
-	EdgeIntersectionList.prototype.add = function add (intPt, segmentIndex, dist) {
-	  var eiNew = new EdgeIntersection(intPt, segmentIndex, dist);
-	  var ei = this._nodeMap.get(eiNew);
-	  if (ei !== null) {
-	    return ei
-	  }
-	  this._nodeMap.put(eiNew, eiNew);
-	  return eiNew
-	};
-	EdgeIntersectionList.prototype.isIntersection = function isIntersection (pt) {
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var ei = it.next();
-	    if (ei.coord.equals(pt)) { return true }
-	  }
-	  return false
-	};
-	EdgeIntersectionList.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeIntersectionList.prototype.getClass = function getClass () {
-	  return EdgeIntersectionList
-	};
+	        /* base-64 pad character. Default '=' for strict RFC compliance   */
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-	var MonotoneChainIndexer = function MonotoneChainIndexer () {};
+	        /* enable/disable utf8 encoding */
+	        rmd160_r1 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8, 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12, 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2, 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13],
+	            rmd160_r2 = [5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12, 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2, 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13, 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14, 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11],
+	            rmd160_s1 = [11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8, 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12, 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5, 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12, 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6],
+	            rmd160_s2 = [8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6, 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11, 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5, 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8, 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11];
+	        /* privileged (public) methods */
+
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s));
+	        };
 
-	MonotoneChainIndexer.prototype.getChainStartIndices = function getChainStartIndices (pts) {
-	    var this$1 = this;
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	  var start = 0;
-	  var startIndexList = new ArrayList();
-	  startIndexList.add(new Integer(start));
-	  do {
-	    var last = this$1.findChainEnd(pts, start);
-	    startIndexList.add(new Integer(last));
-	    start = last;
-	  } while (start < pts.length - 1)
-	  var startIndex = MonotoneChainIndexer.toIntArray(startIndexList);
-	  return startIndex
-	};
-	MonotoneChainIndexer.prototype.findChainEnd = function findChainEnd (pts, start) {
-	  var chainQuad = Quadrant.quadrant(pts[start], pts[start + 1]);
-	  var last = start + 1;
-	  while (last < pts.length) {
-	    var quad = Quadrant.quadrant(pts[last - 1], pts[last]);
-	    if (quad !== chainQuad) { break }
-	    last++;
-	  }
-	  return last - 1
-	};
-	MonotoneChainIndexer.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChainIndexer.prototype.getClass = function getClass () {
-	  return MonotoneChainIndexer
-	};
-	MonotoneChainIndexer.toIntArray = function toIntArray (list) {
-	  var array = new Array(list.size()).fill(null);
-	  for (var i = 0; i < array.length; i++) {
-	    array[i] = list.get(i).intValue();
-	  }
-	  return array
-	};
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	var MonotoneChainEdge = function MonotoneChainEdge () {
-	  this.e = null;
-	  this.pts = null;
-	  this.startIndex = null;
-	  this.env1 = new Envelope();
-	  this.env2 = new Envelope();
-	  var e = arguments[0];
-	  this.e = e;
-	  this.pts = e.getCoordinates();
-	  var mcb = new MonotoneChainIndexer();
-	  this.startIndex = mcb.getChainStartIndices(this.pts);
-	};
-	MonotoneChainEdge.prototype.getCoordinates = function getCoordinates () {
-	  return this.pts
-	};
-	MonotoneChainEdge.prototype.getMaxX = function getMaxX (chainIndex) {
-	  var x1 = this.pts[this.startIndex[chainIndex]].x;
-	  var x2 = this.pts[this.startIndex[chainIndex + 1]].x;
-	  return x1 > x2 ? x1 : x2
-	};
-	MonotoneChainEdge.prototype.getMinX = function getMinX (chainIndex) {
-	  var x1 = this.pts[this.startIndex[chainIndex]].x;
-	  var x2 = this.pts[this.startIndex[chainIndex + 1]].x;
-	  return x1 < x2 ? x1 : x2
-	};
-	MonotoneChainEdge.prototype.computeIntersectsForChain = function computeIntersectsForChain () {
-	  if (arguments.length === 4) {
-	    var chainIndex0 = arguments[0];
-	    var mce = arguments[1];
-	    var chainIndex1 = arguments[2];
-	    var si = arguments[3];
-	    this.computeIntersectsForChain(this.startIndex[chainIndex0], this.startIndex[chainIndex0 + 1], mce, mce.startIndex[chainIndex1], mce.startIndex[chainIndex1 + 1], si);
-	  } else if (arguments.length === 6) {
-	    var start0 = arguments[0];
-	    var end0 = arguments[1];
-	    var mce$1 = arguments[2];
-	    var start1 = arguments[3];
-	    var end1 = arguments[4];
-	    var ei = arguments[5];
-	    var p00 = this.pts[start0];
-	    var p01 = this.pts[end0];
-	    var p10 = mce$1.pts[start1];
-	    var p11 = mce$1.pts[end1];
-	    if (end0 - start0 === 1 && end1 - start1 === 1) {
-	      ei.addIntersections(this.e, start0, mce$1.e, start1);
-	      return null
-	    }
-	    this.env1.init(p00, p01);
-	    this.env2.init(p10, p11);
-	    if (!this.env1.intersects(this.env2)) { return null }
-	    var mid0 = Math.trunc((start0 + end0) / 2);
-	    var mid1 = Math.trunc((start1 + end1) / 2);
-	    if (start0 < mid0) {
-	      if (start1 < mid1) { this.computeIntersectsForChain(start0, mid0, mce$1, start1, mid1, ei); }
-	      if (mid1 < end1) { this.computeIntersectsForChain(start0, mid0, mce$1, mid1, end1, ei); }
-	    }
-	    if (mid0 < end0) {
-	      if (start1 < mid1) { this.computeIntersectsForChain(mid0, end0, mce$1, start1, mid1, ei); }
-	      if (mid1 < end1) { this.computeIntersectsForChain(mid0, end0, mce$1, mid1, end1, ei); }
-	    }
-	  }
-	};
-	MonotoneChainEdge.prototype.getStartIndexes = function getStartIndexes () {
-	  return this.startIndex
-	};
-	MonotoneChainEdge.prototype.computeIntersects = function computeIntersects (mce, si) {
-	    var this$1 = this;
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	  for (var i = 0; i < this.startIndex.length - 1; i++) {
-	    for (var j = 0; j < mce.startIndex.length - 1; j++) {
-	      this$1.computeIntersectsForChain(i, mce, j, si);
-	    }
-	  }
-	};
-	MonotoneChainEdge.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChainEdge.prototype.getClass = function getClass () {
-	  return MonotoneChainEdge
-	};
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	var Depth = function Depth () {
-	  var this$1 = this;
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	  this._depth = Array(2).fill().map(function () { return Array(3); });
-	  for (var i = 0; i < 2; i++) {
-	    for (var j = 0; j < 3; j++) {
-	      this$1._depth[i][j] = Depth.NULL_VALUE;
-	    }
-	  }
-	};
+	        this.any_hmac = function (k, d, e) {
+	          return rstr2any(rstr_hmac(k, d), e);
+	        };
+	        /**
+	         * Perform a simple self-test to see if the VM is working
+	         * @return {String} Hexadecimal hash sample
+	         * @public
+	         */
 
-	var staticAccessors$31 = { NULL_VALUE: { configurable: true } };
-	Depth.prototype.getDepth = function getDepth (geomIndex, posIndex) {
-	  return this._depth[geomIndex][posIndex]
-	};
-	Depth.prototype.setDepth = function setDepth (geomIndex, posIndex, depthValue) {
-	  this._depth[geomIndex][posIndex] = depthValue;
-	};
-	Depth.prototype.isNull = function isNull () {
-	    var this$1 = this;
 
-	  if (arguments.length === 0) {
-	    for (var i = 0; i < 2; i++) {
-	      for (var j = 0; j < 3; j++) {
-	        if (this$1._depth[i][j] !== Depth.NULL_VALUE) { return false }
-	      }
-	    }
-	    return true
-	  } else if (arguments.length === 1) {
-	    var geomIndex = arguments[0];
-	    return this._depth[geomIndex][1] === Depth.NULL_VALUE
-	  } else if (arguments.length === 2) {
-	    var geomIndex$1 = arguments[0];
-	    var posIndex = arguments[1];
-	    return this._depth[geomIndex$1][posIndex] === Depth.NULL_VALUE
-	  }
-	};
-	Depth.prototype.normalize = function normalize () {
-	    var this$1 = this;
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * @description Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	  for (var i = 0; i < 2; i++) {
-	    if (!this$1.isNull(i)) {
-	      var minDepth = this$1._depth[i][1];
-	      if (this$1._depth[i][2] < minDepth) { minDepth = this$1._depth[i][2]; }
-	      if (minDepth < 0) { minDepth = 0; }
-	      for (var j = 1; j < 3; j++) {
-	        var newValue = 0;
-	        if (this$1._depth[i][j] > minDepth) { newValue = 1; }
-	        this$1._depth[i][j] = newValue;
-	      }
-	    }
-	  }
-	};
-	Depth.prototype.getDelta = function getDelta (geomIndex) {
-	  return this._depth[geomIndex][Position.RIGHT] - this._depth[geomIndex][Position.LEFT]
-	};
-	Depth.prototype.getLocation = function getLocation (geomIndex, posIndex) {
-	  if (this._depth[geomIndex][posIndex] <= 0) { return Location.EXTERIOR }
-	  return Location.INTERIOR
-	};
-	Depth.prototype.toString = function toString () {
-	  return 'A: ' + this._depth[0][1] + ',' + this._depth[0][2] + ' B: ' + this._depth[1][1] + ',' + this._depth[1][2]
-	};
-	Depth.prototype.add = function add () {
-	    var this$1 = this;
 
-	  if (arguments.length === 1) {
-	    var lbl = arguments[0];
-	    for (var i = 0; i < 2; i++) {
-	      for (var j = 1; j < 3; j++) {
-	        var loc = lbl.getLocation(i, j);
-	        if (loc === Location.EXTERIOR || loc === Location.INTERIOR) {
-	          if (this$1.isNull(i, j)) {
-	            this$1._depth[i][j] = Depth.depthAtLocation(loc);
-	          } else { this$1._depth[i][j] += Depth.depthAtLocation(loc); }
-	        }
-	      }
-	    }
-	  } else if (arguments.length === 3) {
-	    var geomIndex = arguments[0];
-	    var posIndex = arguments[1];
-	    var location = arguments[2];
-	    if (location === Location.INTERIOR) { this._depth[geomIndex][posIndex]++; }
-	  }
-	};
-	Depth.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Depth.prototype.getClass = function getClass () {
-	  return Depth
-	};
-	Depth.depthAtLocation = function depthAtLocation (location) {
-	  if (location === Location.EXTERIOR) { return 0 }
-	  if (location === Location.INTERIOR) { return 1 }
-	  return Depth.NULL_VALUE
-	};
-	staticAccessors$31.NULL_VALUE.get = function () { return -1 };
-
-	Object.defineProperties( Depth, staticAccessors$31 );
-
-	var Edge = (function (GraphComponent$$1) {
-	  function Edge () {
-	    GraphComponent$$1.call(this);
-	    this.pts = null;
-	    this._env = null;
-	    this.eiList = new EdgeIntersectionList(this);
-	    this._name = null;
-	    this._mce = null;
-	    this._isIsolated = true;
-	    this._depth = new Depth();
-	    this._depthDelta = 0;
-	    if (arguments.length === 1) {
-	      var pts = arguments[0];
-	      Edge.call(this, pts, null);
-	    } else if (arguments.length === 2) {
-	      var pts$1 = arguments[0];
-	      var label = arguments[1];
-	      this.pts = pts$1;
-	      this._label = label;
-	    }
-	  }
+	        this.setUpperCase = function (a) {
 
-	  if ( GraphComponent$$1 ) { Edge.__proto__ = GraphComponent$$1; }
-	  Edge.prototype = Object.create( GraphComponent$$1 && GraphComponent$$1.prototype );
-	  Edge.prototype.constructor = Edge;
-	  Edge.prototype.getDepth = function getDepth () {
-	    return this._depth
-	  };
-	  Edge.prototype.getCollapsedEdge = function getCollapsedEdge () {
-	    var newPts = new Array(2).fill(null);
-	    newPts[0] = this.pts[0];
-	    newPts[1] = this.pts[1];
-	    var newe = new Edge(newPts, Label.toLineLabel(this._label));
-	    return newe
-	  };
-	  Edge.prototype.isIsolated = function isIsolated () {
-	    return this._isIsolated
-	  };
-	  Edge.prototype.getCoordinates = function getCoordinates () {
-	    return this.pts
-	  };
-	  Edge.prototype.setIsolated = function setIsolated (isIsolated) {
-	    this._isIsolated = isIsolated;
-	  };
-	  Edge.prototype.setName = function setName (name) {
-	    this._name = name;
-	  };
-	  Edge.prototype.equals = function equals (o) {
-	    var this$1 = this;
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    if (!(o instanceof Edge)) { return false }
-	    var e = o;
-	    if (this.pts.length !== e.pts.length) { return false }
-	    var isEqualForward = true;
-	    var isEqualReverse = true;
-	    var iRev = this.pts.length;
-	    for (var i = 0; i < this.pts.length; i++) {
-	      if (!this$1.pts[i].equals2D(e.pts[i])) {
-	        isEqualForward = false;
-	      }
-	      if (!this$1.pts[i].equals2D(e.pts[--iRev])) {
-	        isEqualReverse = false;
-	      }
-	      if (!isEqualForward && !isEqualReverse) { return false }
-	    }
-	    return true
-	  };
-	  Edge.prototype.getCoordinate = function getCoordinate () {
-	    if (arguments.length === 0) {
-	      if (this.pts.length > 0) { return this.pts[0] }
-	      return null
-	    } else if (arguments.length === 1) {
-	      var i = arguments[0];
-	      return this.pts[i]
-	    }
-	  };
-	  Edge.prototype.print = function print (out) {
-	    var this$1 = this;
 
-	    out.print('edge ' + this._name + ': ');
-	    out.print('LINESTRING (');
-	    for (var i = 0; i < this.pts.length; i++) {
-	      if (i > 0) { out.print(','); }
-	      out.print(this$1.pts[i].x + ' ' + this$1.pts[i].y);
-	    }
-	    out.print(')  ' + this._label + ' ' + this._depthDelta);
-	  };
-	  Edge.prototype.computeIM = function computeIM (im) {
-	    Edge.updateIM(this._label, im);
-	  };
-	  Edge.prototype.isCollapsed = function isCollapsed () {
-	    if (!this._label.isArea()) { return false }
-	    if (this.pts.length !== 3) { return false }
-	    if (this.pts[0].equals(this.pts[2])) { return true }
-	    return false
-	  };
-	  Edge.prototype.isClosed = function isClosed () {
-	    return this.pts[0].equals(this.pts[this.pts.length - 1])
-	  };
-	  Edge.prototype.getMaximumSegmentIndex = function getMaximumSegmentIndex () {
-	    return this.pts.length - 1
-	  };
-	  Edge.prototype.getDepthDelta = function getDepthDelta () {
-	    return this._depthDelta
-	  };
-	  Edge.prototype.getNumPoints = function getNumPoints () {
-	    return this.pts.length
-	  };
-	  Edge.prototype.printReverse = function printReverse (out) {
-	    var this$1 = this;
+	        this.setPad = function (a) {
+	          if (typeof a !== 'undefined') {
+	            b64pad = a;
+	          }
 
-	    out.print('edge ' + this._name + ': ');
-	    for (var i = this.pts.length - 1; i >= 0; i--) {
-	      out.print(this$1.pts[i] + ' ');
-	    }
-	    out.println('');
-	  };
-	  Edge.prototype.getMonotoneChainEdge = function getMonotoneChainEdge () {
-	    if (this._mce === null) { this._mce = new MonotoneChainEdge(this); }
-	    return this._mce
-	  };
-	  Edge.prototype.getEnvelope = function getEnvelope () {
-	    var this$1 = this;
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    if (this._env === null) {
-	      this._env = new Envelope();
-	      for (var i = 0; i < this.pts.length; i++) {
-	        this$1._env.expandToInclude(this$1.pts[i]);
-	      }
-	    }
-	    return this._env
-	  };
-	  Edge.prototype.addIntersection = function addIntersection (li, segmentIndex, geomIndex, intIndex) {
-	    var intPt = new Coordinate(li.getIntersection(intIndex));
-	    var normalizedSegmentIndex = segmentIndex;
-	    var dist = li.getEdgeDistance(geomIndex, intIndex);
-	    var nextSegIndex = normalizedSegmentIndex + 1;
-	    if (nextSegIndex < this.pts.length) {
-	      var nextPt = this.pts[nextSegIndex];
-	      if (intPt.equals2D(nextPt)) {
-	        normalizedSegmentIndex = nextSegIndex;
-	        dist = 0.0;
-	      }
-	    }
-	    this.eiList.add(intPt, normalizedSegmentIndex, dist);
-	  };
-	  Edge.prototype.toString = function toString () {
-	    var this$1 = this;
 
-	    var buf = new StringBuffer();
-	    buf.append('edge ' + this._name + ': ');
-	    buf.append('LINESTRING (');
-	    for (var i = 0; i < this.pts.length; i++) {
-	      if (i > 0) { buf.append(','); }
-	      buf.append(this$1.pts[i].x + ' ' + this$1.pts[i].y);
-	    }
-	    buf.append(')  ' + this._label + ' ' + this._depthDelta);
-	    return buf.toString()
-	  };
-	  Edge.prototype.isPointwiseEqual = function isPointwiseEqual (e) {
-	    var this$1 = this;
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	    if (this.pts.length !== e.pts.length) { return false }
-	    for (var i = 0; i < this.pts.length; i++) {
-	      if (!this$1.pts[i].equals2D(e.pts[i])) {
-	        return false
-	      }
-	    }
-	    return true
-	  };
-	  Edge.prototype.setDepthDelta = function setDepthDelta (depthDelta) {
-	    this._depthDelta = depthDelta;
-	  };
-	  Edge.prototype.getEdgeIntersectionList = function getEdgeIntersectionList () {
-	    return this.eiList
-	  };
-	  Edge.prototype.addIntersections = function addIntersections (li, segmentIndex, geomIndex) {
-	    var this$1 = this;
+	          return this;
+	        };
+	        /* private methods */
 
-	    for (var i = 0; i < li.getIntersectionNum(); i++) {
-	      this$1.addIntersection(li, segmentIndex, geomIndex, i);
-	    }
-	  };
-	  Edge.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  Edge.prototype.getClass = function getClass () {
-	    return Edge
-	  };
-	  Edge.updateIM = function updateIM () {
-	    if (arguments.length === 2) {
-	      var label = arguments[0];
-	      var im = arguments[1];
-	      im.setAtLeastIfValid(label.getLocation(0, Position.ON), label.getLocation(1, Position.ON), 1);
-	      if (label.isArea()) {
-	        im.setAtLeastIfValid(label.getLocation(0, Position.LEFT), label.getLocation(1, Position.LEFT), 2);
-	        im.setAtLeastIfValid(label.getLocation(0, Position.RIGHT), label.getLocation(1, Position.RIGHT), 2);
-	      }
-	    } else { return GraphComponent$$1.prototype.updateIM.apply(this, arguments) }
-	  };
+	        /**
+	         * Calculate the rmd160 of a raw string
+	         */
 
-	  return Edge;
-	}(GraphComponent));
 
-	var BufferBuilder = function BufferBuilder (bufParams) {
-	  this._workingPrecisionModel = null;
-	  this._workingNoder = null;
-	  this._geomFact = null;
-	  this._graph = null;
-	  this._edgeList = new EdgeList();
-	  this._bufParams = bufParams || null;
-	};
-	BufferBuilder.prototype.setWorkingPrecisionModel = function setWorkingPrecisionModel (pm) {
-	  this._workingPrecisionModel = pm;
-	};
-	BufferBuilder.prototype.insertUniqueEdge = function insertUniqueEdge (e) {
-	  var existingEdge = this._edgeList.findEqualEdge(e);
-	  if (existingEdge !== null) {
-	    var existingLabel = existingEdge.getLabel();
-	    var labelToMerge = e.getLabel();
-	    if (!existingEdge.isPointwiseEqual(e)) {
-	      labelToMerge = new Label(e.getLabel());
-	      labelToMerge.flip();
-	    }
-	    existingLabel.merge(labelToMerge);
-	    var mergeDelta = BufferBuilder.depthDelta(labelToMerge);
-	    var existingDelta = existingEdge.getDepthDelta();
-	    var newDelta = existingDelta + mergeDelta;
-	    existingEdge.setDepthDelta(newDelta);
-	  } else {
-	    this._edgeList.add(e);
-	    e.setDepthDelta(BufferBuilder.depthDelta(e.getLabel()));
-	  }
-	};
-	BufferBuilder.prototype.buildSubgraphs = function buildSubgraphs (subgraphList, polyBuilder) {
-	  var processedGraphs = new ArrayList();
-	  for (var i = subgraphList.iterator(); i.hasNext();) {
-	    var subgraph = i.next();
-	    var p = subgraph.getRightmostCoordinate();
-	    var locater = new SubgraphDepthLocater(processedGraphs);
-	    var outsideDepth = locater.getDepth(p);
-	    subgraph.computeDepth(outsideDepth);
-	    subgraph.findResultEdges();
-	    processedGraphs.add(subgraph);
-	    polyBuilder.add(subgraph.getDirectedEdges(), subgraph.getNodes());
-	  }
-	};
-	BufferBuilder.prototype.createSubgraphs = function createSubgraphs (graph) {
-	  var subgraphList = new ArrayList();
-	  for (var i = graph.getNodes().iterator(); i.hasNext();) {
-	    var node = i.next();
-	    if (!node.isVisited()) {
-	      var subgraph = new BufferSubgraph();
-	      subgraph.create(node);
-	      subgraphList.add(subgraph);
-	    }
-	  }
-	  Collections.sort(subgraphList, Collections.reverseOrder());
-	  return subgraphList
-	};
-	BufferBuilder.prototype.createEmptyResultGeometry = function createEmptyResultGeometry () {
-	  var emptyGeom = this._geomFact.createPolygon();
-	  return emptyGeom
-	};
-	BufferBuilder.prototype.getNoder = function getNoder (precisionModel) {
-	  if (this._workingNoder !== null) { return this._workingNoder }
-	  var noder = new MCIndexNoder();
-	  var li = new RobustLineIntersector();
-	  li.setPrecisionModel(precisionModel);
-	  noder.setSegmentIntersector(new IntersectionAdder(li));
-	  return noder
-	};
-	BufferBuilder.prototype.buffer = function buffer (g, distance) {
-	  var precisionModel = this._workingPrecisionModel;
-	  if (precisionModel === null) { precisionModel = g.getPrecisionModel(); }
-	  this._geomFact = g.getFactory();
-	  var curveBuilder = new OffsetCurveBuilder(precisionModel, this._bufParams);
-	  var curveSetBuilder = new OffsetCurveSetBuilder(g, distance, curveBuilder);
-	  var bufferSegStrList = curveSetBuilder.getCurves();
-	  if (bufferSegStrList.size() <= 0) {
-	    return this.createEmptyResultGeometry()
-	  }
-	  this.computeNodedEdges(bufferSegStrList, precisionModel);
-	  this._graph = new PlanarGraph(new OverlayNodeFactory());
-	  this._graph.addEdges(this._edgeList.getEdges());
-	  var subgraphList = this.createSubgraphs(this._graph);
-	  var polyBuilder = new PolygonBuilder(this._geomFact);
-	  this.buildSubgraphs(subgraphList, polyBuilder);
-	  var resultPolyList = polyBuilder.getPolygons();
-	  if (resultPolyList.size() <= 0) {
-	    return this.createEmptyResultGeometry()
-	  }
-	  var resultGeom = this._geomFact.buildGeometry(resultPolyList);
-	  return resultGeom
-	};
-	BufferBuilder.prototype.computeNodedEdges = function computeNodedEdges (bufferSegStrList, precisionModel) {
-	    var this$1 = this;
-
-	  var noder = this.getNoder(precisionModel);
-	  noder.computeNodes(bufferSegStrList);
-	  var nodedSegStrings = noder.getNodedSubstrings();
-	  for (var i = nodedSegStrings.iterator(); i.hasNext();) {
-	    var segStr = i.next();
-	    var pts = segStr.getCoordinates();
-	    if (pts.length === 2 && pts[0].equals2D(pts[1])) { continue }
-	    var oldLabel = segStr.getData();
-	    var edge = new Edge(segStr.getCoordinates(), new Label(oldLabel));
-	    this$1.insertUniqueEdge(edge);
-	  }
-	};
-	BufferBuilder.prototype.setNoder = function setNoder (noder) {
-	  this._workingNoder = noder;
-	};
-	BufferBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferBuilder.prototype.getClass = function getClass () {
-	  return BufferBuilder
-	};
-	BufferBuilder.depthDelta = function depthDelta (label) {
-	  var lLoc = label.getLocation(0, Position.LEFT);
-	  var rLoc = label.getLocation(0, Position.RIGHT);
-	  if (lLoc === Location.INTERIOR && rLoc === Location.EXTERIOR) { return 1; } else if (lLoc === Location.EXTERIOR && rLoc === Location.INTERIOR) { return -1 }
-	  return 0
-	};
-	BufferBuilder.convertSegStrings = function convertSegStrings (it) {
-	  var fact = new GeometryFactory();
-	  var lines = new ArrayList();
-	  while (it.hasNext()) {
-	    var ss = it.next();
-	    var line = fact.createLineString(ss.getCoordinates());
-	    lines.add(line);
-	  }
-	  return fact.buildGeometry(lines)
-	};
+	        function rstr(s) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binl2rstr(binl(rstr2binl(s), s.length * 8));
+	        }
+	        /**
+	         * Calculate the HMAC-rmd160 of a key and some data (raw strings)
+	         */
 
-	var ScaledNoder = function ScaledNoder () {
-	  this._noder = null;
-	  this._scaleFactor = null;
-	  this._offsetX = null;
-	  this._offsetY = null;
-	  this._isScaled = false;
-	  if (arguments.length === 2) {
-	    var noder = arguments[0];
-	    var scaleFactor = arguments[1];
-	    this._noder = noder;
-	    this._scaleFactor = scaleFactor;
-	    this._offsetX = 0.0;
-	    this._offsetY = 0.0;
-	    this._isScaled = !this.isIntegerPrecision();
-	  } else if (arguments.length === 4) {
-	    var noder$1 = arguments[0];
-	    var scaleFactor$1 = arguments[1];
-	    var offsetX = arguments[2];
-	    var offsetY = arguments[3];
-	    this._noder = noder$1;
-	    this._scaleFactor = scaleFactor$1;
-	    this._offsetX = offsetX;
-	    this._offsetY = offsetY;
-	    this._isScaled = !this.isIntegerPrecision();
-	  }
-	};
-	ScaledNoder.prototype.rescale = function rescale () {
-	    var this$1 = this;
-
-	  if (hasInterface(arguments[0], Collection)) {
-	    var segStrings = arguments[0];
-	    for (var i = segStrings.iterator(); i.hasNext();) {
-	      var ss = i.next();
-	      this$1.rescale(ss.getCoordinates());
-	    }
-	  } else if (arguments[0] instanceof Array) {
-	    var pts = arguments[0];
-	    // let p0 = null
-	    // let p1 = null
-	    // if (pts.length === 2) {
-	    // p0 = new Coordinate(pts[0])
-	    // p1 = new Coordinate(pts[1])
-	    // }
-	    for (var i$1 = 0; i$1 < pts.length; i$1++) {
-	      pts[i$1].x = pts[i$1].x / this$1._scaleFactor + this$1._offsetX;
-	      pts[i$1].y = pts[i$1].y / this$1._scaleFactor + this$1._offsetY;
-	    }
-	    if (pts.length === 2 && pts[0].equals2D(pts[1])) {
-	      System.out.println(pts);
-	    }
-	  }
-	};
-	ScaledNoder.prototype.scale = function scale () {
-	    var this$1 = this;
-
-	  if (hasInterface(arguments[0], Collection)) {
-	    var segStrings = arguments[0];
-	    var nodedSegmentStrings = new ArrayList();
-	    for (var i = segStrings.iterator(); i.hasNext();) {
-	      var ss = i.next();
-	      nodedSegmentStrings.add(new NodedSegmentString(this$1.scale(ss.getCoordinates()), ss.getData()));
-	    }
-	    return nodedSegmentStrings
-	  } else if (arguments[0] instanceof Array) {
-	    var pts = arguments[0];
-	    var roundPts = new Array(pts.length).fill(null);
-	    for (var i$1 = 0; i$1 < pts.length; i$1++) {
-	      roundPts[i$1] = new Coordinate(Math.round((pts[i$1].x - this$1._offsetX) * this$1._scaleFactor), Math.round((pts[i$1].y - this$1._offsetY) * this$1._scaleFactor), pts[i$1].z);
-	    }
-	    var roundPtsNoDup = CoordinateArrays.removeRepeatedPoints(roundPts);
-	    return roundPtsNoDup
-	  }
-	};
-	ScaledNoder.prototype.isIntegerPrecision = function isIntegerPrecision () {
-	  return this._scaleFactor === 1.0
-	};
-	ScaledNoder.prototype.getNodedSubstrings = function getNodedSubstrings () {
-	  var splitSS = this._noder.getNodedSubstrings();
-	  if (this._isScaled) { this.rescale(splitSS); }
-	  return splitSS
-	};
-	ScaledNoder.prototype.computeNodes = function computeNodes (inputSegStrings) {
-	  var intSegStrings = inputSegStrings;
-	  if (this._isScaled) { intSegStrings = this.scale(inputSegStrings); }
-	  this._noder.computeNodes(intSegStrings);
-	};
-	ScaledNoder.prototype.interfaces_ = function interfaces_ () {
-	  return [Noder]
-	};
-	ScaledNoder.prototype.getClass = function getClass () {
-	  return ScaledNoder
-	};
 
-	var NodingValidator = function NodingValidator () {
-	  this._li = new RobustLineIntersector();
-	  this._segStrings = null;
-	  var segStrings = arguments[0];
-	  this._segStrings = segStrings;
-	};
+	        function rstr_hmac(key, data) {
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          var i,
+	              hash,
+	              bkey = rstr2binl(key),
+	              ipad = Array(16),
+	              opad = Array(16);
+
+	          if (bkey.length > 16) {
+	            bkey = binl(bkey, key.length * 8);
+	          }
+
+	          for (i = 0; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	var staticAccessors$33 = { fact: { configurable: true } };
-	NodingValidator.prototype.checkEndPtVertexIntersections = function checkEndPtVertexIntersections () {
-	    var this$1 = this;
+	          hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
+	          return binl2rstr(binl(opad.concat(hash), 512 + 160));
+	        }
+	        /**
+	         * Convert an array of little-endian words to a string
+	         */
 
-	  if (arguments.length === 0) {
-	    for (var i = this._segStrings.iterator(); i.hasNext();) {
-	      var ss = i.next();
-	      var pts = ss.getCoordinates();
-	      this$1.checkEndPtVertexIntersections(pts[0], this$1._segStrings);
-	      this$1.checkEndPtVertexIntersections(pts[pts.length - 1], this$1._segStrings);
-	    }
-	  } else if (arguments.length === 2) {
-	    var testPt = arguments[0];
-	    var segStrings = arguments[1];
-	    for (var i$1 = segStrings.iterator(); i$1.hasNext();) {
-	      var ss$1 = i$1.next();
-	      var pts$1 = ss$1.getCoordinates();
-	      for (var j = 1; j < pts$1.length - 1; j++) {
-	        if (pts$1[j].equals(testPt)) { throw new RuntimeException('found endpt/interior pt intersection at index ' + j + ' :pt ' + testPt) }
-	      }
-	    }
-	  }
-	};
-	NodingValidator.prototype.checkInteriorIntersections = function checkInteriorIntersections () {
-	    var this$1 = this;
-
-	  if (arguments.length === 0) {
-	    for (var i = this._segStrings.iterator(); i.hasNext();) {
-	      var ss0 = i.next();
-	      for (var j = this._segStrings.iterator(); j.hasNext();) {
-	        var ss1 = j.next();
-	        this$1.checkInteriorIntersections(ss0, ss1);
-	      }
-	    }
-	  } else if (arguments.length === 2) {
-	    var ss0$1 = arguments[0];
-	    var ss1$1 = arguments[1];
-	    var pts0 = ss0$1.getCoordinates();
-	    var pts1 = ss1$1.getCoordinates();
-	    for (var i0 = 0; i0 < pts0.length - 1; i0++) {
-	      for (var i1 = 0; i1 < pts1.length - 1; i1++) {
-	        this$1.checkInteriorIntersections(ss0$1, i0, ss1$1, i1);
-	      }
-	    }
-	  } else if (arguments.length === 4) {
-	    var e0 = arguments[0];
-	    var segIndex0 = arguments[1];
-	    var e1 = arguments[2];
-	    var segIndex1 = arguments[3];
-	    if (e0 === e1 && segIndex0 === segIndex1) { return null }
-	    var p00 = e0.getCoordinates()[segIndex0];
-	    var p01 = e0.getCoordinates()[segIndex0 + 1];
-	    var p10 = e1.getCoordinates()[segIndex1];
-	    var p11 = e1.getCoordinates()[segIndex1 + 1];
-	    this._li.computeIntersection(p00, p01, p10, p11);
-	    if (this._li.hasIntersection()) {
-	      if (this._li.isProper() || this.hasInteriorIntersection(this._li, p00, p01) || this.hasInteriorIntersection(this._li, p10, p11)) {
-	        throw new RuntimeException('found non-noded intersection at ' + p00 + '-' + p01 + ' and ' + p10 + '-' + p11)
-	      }
-	    }
-	  }
-	};
-	NodingValidator.prototype.checkValid = function checkValid () {
-	  this.checkEndPtVertexIntersections();
-	  this.checkInteriorIntersections();
-	  this.checkCollapses();
-	};
-	NodingValidator.prototype.checkCollapses = function checkCollapses () {
-	    var this$1 = this;
 
-	  if (arguments.length === 0) {
-	    for (var i = this._segStrings.iterator(); i.hasNext();) {
-	      var ss = i.next();
-	      this$1.checkCollapses(ss);
-	    }
-	  } else if (arguments.length === 1) {
-	    var ss$1 = arguments[0];
-	    var pts = ss$1.getCoordinates();
-	    for (var i$1 = 0; i$1 < pts.length - 2; i$1++) {
-	      this$1.checkCollapse(pts[i$1], pts[i$1 + 1], pts[i$1 + 2]);
-	    }
-	  }
-	};
-	NodingValidator.prototype.hasInteriorIntersection = function hasInteriorIntersection (li, p0, p1) {
-	  for (var i = 0; i < li.getIntersectionNum(); i++) {
-	    var intPt = li.getIntersection(i);
-	    if (!(intPt.equals(p0) || intPt.equals(p1))) { return true }
-	  }
-	  return false
-	};
-	NodingValidator.prototype.checkCollapse = function checkCollapse (p0, p1, p2) {
-	  if (p0.equals(p2)) { throw new RuntimeException('found non-noded collapse at ' + NodingValidator.fact.createLineString([p0, p1, p2])) }
-	};
-	NodingValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	NodingValidator.prototype.getClass = function getClass () {
-	  return NodingValidator
-	};
-	staticAccessors$33.fact.get = function () { return new GeometryFactory() };
-
-	Object.defineProperties( NodingValidator, staticAccessors$33 );
-
-	var HotPixel = function HotPixel () {
-	  this._li = null;
-	  this._pt = null;
-	  this._originalPt = null;
-	  this._ptScaled = null;
-	  this._p0Scaled = null;
-	  this._p1Scaled = null;
-	  this._scaleFactor = null;
-	  this._minx = null;
-	  this._maxx = null;
-	  this._miny = null;
-	  this._maxy = null;
-	  this._corner = new Array(4).fill(null);
-	  this._safeEnv = null;
-	  var pt = arguments[0];
-	  var scaleFactor = arguments[1];
-	  var li = arguments[2];
-	  this._originalPt = pt;
-	  this._pt = pt;
-	  this._scaleFactor = scaleFactor;
-	  this._li = li;
-	  if (scaleFactor <= 0) { throw new IllegalArgumentException('Scale factor must be non-zero') }
-	  if (scaleFactor !== 1.0) {
-	    this._pt = new Coordinate(this.scale(pt.x), this.scale(pt.y));
-	    this._p0Scaled = new Coordinate();
-	    this._p1Scaled = new Coordinate();
-	  }
-	  this.initCorners(this._pt);
-	};
+	        function binl2rstr(input) {
+	          var i,
+	              output = '',
+	              l = input.length * 32;
 
-	var staticAccessors$34 = { SAFE_ENV_EXPANSION_FACTOR: { configurable: true } };
-	HotPixel.prototype.intersectsScaled = function intersectsScaled (p0, p1) {
-	  var segMinx = Math.min(p0.x, p1.x);
-	  var segMaxx = Math.max(p0.x, p1.x);
-	  var segMiny = Math.min(p0.y, p1.y);
-	  var segMaxy = Math.max(p0.y, p1.y);
-	  var isOutsidePixelEnv = this._maxx < segMinx || this._minx > segMaxx || this._maxy < segMiny || this._miny > segMaxy;
-	  if (isOutsidePixelEnv) { return false }
-	  var intersects = this.intersectsToleranceSquare(p0, p1);
-	  Assert.isTrue(!(isOutsidePixelEnv && intersects), 'Found bad envelope test');
-	  return intersects
-	};
-	HotPixel.prototype.initCorners = function initCorners (pt) {
-	  var tolerance = 0.5;
-	  this._minx = pt.x - tolerance;
-	  this._maxx = pt.x + tolerance;
-	  this._miny = pt.y - tolerance;
-	  this._maxy = pt.y + tolerance;
-	  this._corner[0] = new Coordinate(this._maxx, this._maxy);
-	  this._corner[1] = new Coordinate(this._minx, this._maxy);
-	  this._corner[2] = new Coordinate(this._minx, this._miny);
-	  this._corner[3] = new Coordinate(this._maxx, this._miny);
-	};
-	HotPixel.prototype.intersects = function intersects (p0, p1) {
-	  if (this._scaleFactor === 1.0) { return this.intersectsScaled(p0, p1) }
-	  this.copyScaled(p0, this._p0Scaled);
-	  this.copyScaled(p1, this._p1Scaled);
-	  return this.intersectsScaled(this._p0Scaled, this._p1Scaled)
-	};
-	HotPixel.prototype.scale = function scale (val) {
-	  return Math.round(val * this._scaleFactor)
-	};
-	HotPixel.prototype.getCoordinate = function getCoordinate () {
-	  return this._originalPt
-	};
-	HotPixel.prototype.copyScaled = function copyScaled (p, pScaled) {
-	  pScaled.x = this.scale(p.x);
-	  pScaled.y = this.scale(p.y);
-	};
-	HotPixel.prototype.getSafeEnvelope = function getSafeEnvelope () {
-	  if (this._safeEnv === null) {
-	    var safeTolerance = HotPixel.SAFE_ENV_EXPANSION_FACTOR / this._scaleFactor;
-	    this._safeEnv = new Envelope(this._originalPt.x - safeTolerance, this._originalPt.x + safeTolerance, this._originalPt.y - safeTolerance, this._originalPt.y + safeTolerance);
-	  }
-	  return this._safeEnv
-	};
-	HotPixel.prototype.intersectsPixelClosure = function intersectsPixelClosure (p0, p1) {
-	  this._li.computeIntersection(p0, p1, this._corner[0], this._corner[1]);
-	  if (this._li.hasIntersection()) { return true }
-	  this._li.computeIntersection(p0, p1, this._corner[1], this._corner[2]);
-	  if (this._li.hasIntersection()) { return true }
-	  this._li.computeIntersection(p0, p1, this._corner[2], this._corner[3]);
-	  if (this._li.hasIntersection()) { return true }
-	  this._li.computeIntersection(p0, p1, this._corner[3], this._corner[0]);
-	  if (this._li.hasIntersection()) { return true }
-	  return false
-	};
-	HotPixel.prototype.intersectsToleranceSquare = function intersectsToleranceSquare (p0, p1) {
-	  var intersectsLeft = false;
-	  var intersectsBottom = false;
-	  this._li.computeIntersection(p0, p1, this._corner[0], this._corner[1]);
-	  if (this._li.isProper()) { return true }
-	  this._li.computeIntersection(p0, p1, this._corner[1], this._corner[2]);
-	  if (this._li.isProper()) { return true }
-	  if (this._li.hasIntersection()) { intersectsLeft = true; }
-	  this._li.computeIntersection(p0, p1, this._corner[2], this._corner[3]);
-	  if (this._li.isProper()) { return true }
-	  if (this._li.hasIntersection()) { intersectsBottom = true; }
-	  this._li.computeIntersection(p0, p1, this._corner[3], this._corner[0]);
-	  if (this._li.isProper()) { return true }
-	  if (intersectsLeft && intersectsBottom) { return true }
-	  if (p0.equals(this._pt)) { return true }
-	  if (p1.equals(this._pt)) { return true }
-	  return false
-	};
-	HotPixel.prototype.addSnappedNode = function addSnappedNode (segStr, segIndex) {
-	  var p0 = segStr.getCoordinate(segIndex);
-	  var p1 = segStr.getCoordinate(segIndex + 1);
-	  if (this.intersects(p0, p1)) {
-	    segStr.addIntersection(this.getCoordinate(), segIndex);
-	    return true
-	  }
-	  return false
-	};
-	HotPixel.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	HotPixel.prototype.getClass = function getClass () {
-	  return HotPixel
-	};
-	staticAccessors$34.SAFE_ENV_EXPANSION_FACTOR.get = function () { return 0.75 };
+	          for (i = 0; i < l; i += 8) {
+	            output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+	          }
 
-	Object.defineProperties( HotPixel, staticAccessors$34 );
+	          return output;
+	        }
+	        /**
+	         * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
+	         */
+
+
+	        function binl(x, len) {
+	          var T,
+	              j,
+	              i,
+	              l,
+	              h0 = 0x67452301,
+	              h1 = 0xefcdab89,
+	              h2 = 0x98badcfe,
+	              h3 = 0x10325476,
+	              h4 = 0xc3d2e1f0,
+	              A1,
+	              B1,
+	              C1,
+	              D1,
+	              E1,
+	              A2,
+	              B2,
+	              C2,
+	              D2,
+	              E2;
+	          /* append padding */
+
+	          x[len >> 5] |= 0x80 << len % 32;
+	          x[(len + 64 >>> 9 << 4) + 14] = len;
+	          l = x.length;
+
+	          for (i = 0; i < l; i += 16) {
+	            A1 = A2 = h0;
+	            B1 = B2 = h1;
+	            C1 = C2 = h2;
+	            D1 = D2 = h3;
+	            E1 = E2 = h4;
+
+	            for (j = 0; j <= 79; j += 1) {
+	              T = safe_add(A1, rmd160_f(j, B1, C1, D1));
+	              T = safe_add(T, x[i + rmd160_r1[j]]);
+	              T = safe_add(T, rmd160_K1(j));
+	              T = safe_add(bit_rol(T, rmd160_s1[j]), E1);
+	              A1 = E1;
+	              E1 = D1;
+	              D1 = bit_rol(C1, 10);
+	              C1 = B1;
+	              B1 = T;
+	              T = safe_add(A2, rmd160_f(79 - j, B2, C2, D2));
+	              T = safe_add(T, x[i + rmd160_r2[j]]);
+	              T = safe_add(T, rmd160_K2(j));
+	              T = safe_add(bit_rol(T, rmd160_s2[j]), E2);
+	              A2 = E2;
+	              E2 = D2;
+	              D2 = bit_rol(C2, 10);
+	              C2 = B2;
+	              B2 = T;
+	            }
+
+	            T = safe_add(h1, safe_add(C1, D2));
+	            h1 = safe_add(h2, safe_add(D1, E2));
+	            h2 = safe_add(h3, safe_add(E1, A2));
+	            h3 = safe_add(h4, safe_add(A1, B2));
+	            h4 = safe_add(h0, safe_add(B1, C2));
+	            h0 = T;
+	          }
 
-	var MonotoneChainSelectAction = function MonotoneChainSelectAction () {
-	  this.tempEnv1 = new Envelope();
-	  this.selectedSegment = new LineSegment();
-	};
-	MonotoneChainSelectAction.prototype.select = function select () {
-	  if (arguments.length === 1) ; else if (arguments.length === 2) {
-	    var mc = arguments[0];
-	    var startIndex = arguments[1];
-	    mc.getLineSegment(startIndex, this.selectedSegment);
-	    this.select(this.selectedSegment);
-	  }
-	};
-	MonotoneChainSelectAction.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChainSelectAction.prototype.getClass = function getClass () {
-	  return MonotoneChainSelectAction
-	};
+	          return [h0, h1, h2, h3, h4];
+	        } // specific algorithm methods
 
-	var MCIndexPointSnapper = function MCIndexPointSnapper () {
-	  this._index = null;
-	  var index = arguments[0];
-	  this._index = index;
-	};
 
-	var staticAccessors$35 = { HotPixelSnapAction: { configurable: true } };
-	MCIndexPointSnapper.prototype.snap = function snap () {
-	  if (arguments.length === 1) {
-	    var hotPixel = arguments[0];
-	    return this.snap(hotPixel, null, -1)
-	  } else if (arguments.length === 3) {
-	    var hotPixel$1 = arguments[0];
-	    var parentEdge = arguments[1];
-	    var hotPixelVertexIndex = arguments[2];
-	    var pixelEnv = hotPixel$1.getSafeEnvelope();
-	    var hotPixelSnapAction = new HotPixelSnapAction(hotPixel$1, parentEdge, hotPixelVertexIndex);
-	    this._index.query(pixelEnv, {
-	      interfaces_: function () {
-	        return [ItemVisitor]
-	      },
-	      visitItem: function (item) {
-	        var testChain = item;
-	        testChain.select(pixelEnv, hotPixelSnapAction);
-	      }
-	    });
-	    return hotPixelSnapAction.isNodeAdded()
-	  }
-	};
-	MCIndexPointSnapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MCIndexPointSnapper.prototype.getClass = function getClass () {
-	  return MCIndexPointSnapper
-	};
-	staticAccessors$35.HotPixelSnapAction.get = function () { return HotPixelSnapAction };
-
-	Object.defineProperties( MCIndexPointSnapper, staticAccessors$35 );
-
-	var HotPixelSnapAction = (function (MonotoneChainSelectAction$$1) {
-	  function HotPixelSnapAction () {
-	    MonotoneChainSelectAction$$1.call(this);
-	    this._hotPixel = null;
-	    this._parentEdge = null;
-	    this._hotPixelVertexIndex = null;
-	    this._isNodeAdded = false;
-	    var hotPixel = arguments[0];
-	    var parentEdge = arguments[1];
-	    var hotPixelVertexIndex = arguments[2];
-	    this._hotPixel = hotPixel;
-	    this._parentEdge = parentEdge;
-	    this._hotPixelVertexIndex = hotPixelVertexIndex;
-	  }
-
-	  if ( MonotoneChainSelectAction$$1 ) { HotPixelSnapAction.__proto__ = MonotoneChainSelectAction$$1; }
-	  HotPixelSnapAction.prototype = Object.create( MonotoneChainSelectAction$$1 && MonotoneChainSelectAction$$1.prototype );
-	  HotPixelSnapAction.prototype.constructor = HotPixelSnapAction;
-	  HotPixelSnapAction.prototype.isNodeAdded = function isNodeAdded () {
-	    return this._isNodeAdded
-	  };
-	  HotPixelSnapAction.prototype.select = function select () {
-	    if (arguments.length === 2) {
-	      var mc = arguments[0];
-	      var startIndex = arguments[1];
-	      var ss = mc.getContext();
-	      if (this._parentEdge !== null) {
-	        if (ss === this._parentEdge && startIndex === this._hotPixelVertexIndex) { return null }
-	      }
-	      this._isNodeAdded = this._hotPixel.addSnappedNode(ss, startIndex);
-	    } else { return MonotoneChainSelectAction$$1.prototype.select.apply(this, arguments) }
-	  };
-	  HotPixelSnapAction.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  HotPixelSnapAction.prototype.getClass = function getClass () {
-	    return HotPixelSnapAction
-	  };
-
-	  return HotPixelSnapAction;
-	}(MonotoneChainSelectAction));
-
-	var InteriorIntersectionFinderAdder = function InteriorIntersectionFinderAdder () {
-	  this._li = null;
-	  this._interiorIntersections = null;
-	  var li = arguments[0];
-	  this._li = li;
-	  this._interiorIntersections = new ArrayList();
-	};
-	InteriorIntersectionFinderAdder.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {
-	    var this$1 = this;
+	        function rmd160_f(j, x, y, z) {
+	          return 0 <= j && j <= 15 ? x ^ y ^ z : 16 <= j && j <= 31 ? x & y | ~x & z : 32 <= j && j <= 47 ? (x | ~y) ^ z : 48 <= j && j <= 63 ? x & z | y & ~z : 64 <= j && j <= 79 ? x ^ (y | ~z) : 'rmd160_f: j out of range';
+	        }
+
+	        function rmd160_K1(j) {
+	          return 0 <= j && j <= 15 ? 0x00000000 : 16 <= j && j <= 31 ? 0x5a827999 : 32 <= j && j <= 47 ? 0x6ed9eba1 : 48 <= j && j <= 63 ? 0x8f1bbcdc : 64 <= j && j <= 79 ? 0xa953fd4e : 'rmd160_K1: j out of range';
+	        }
 
-	  if (e0 === e1 && segIndex0 === segIndex1) { return null }
-	  var p00 = e0.getCoordinates()[segIndex0];
-	  var p01 = e0.getCoordinates()[segIndex0 + 1];
-	  var p10 = e1.getCoordinates()[segIndex1];
-	  var p11 = e1.getCoordinates()[segIndex1 + 1];
-	  this._li.computeIntersection(p00, p01, p10, p11);
-	  if (this._li.hasIntersection()) {
-	    if (this._li.isInteriorIntersection()) {
-	      for (var intIndex = 0; intIndex < this._li.getIntersectionNum(); intIndex++) {
-	        this$1._interiorIntersections.add(this$1._li.getIntersection(intIndex));
+	        function rmd160_K2(j) {
+	          return 0 <= j && j <= 15 ? 0x50a28be6 : 16 <= j && j <= 31 ? 0x5c4dd124 : 32 <= j && j <= 47 ? 0x6d703ef3 : 48 <= j && j <= 63 ? 0x7a6d76e9 : 64 <= j && j <= 79 ? 0x00000000 : 'rmd160_K2: j out of range';
+	        }
 	      }
-	      e0.addIntersections(this._li, segIndex0, 0);
-	      e1.addIntersections(this._li, segIndex1, 1);
-	    }
-	  }
-	};
-	InteriorIntersectionFinderAdder.prototype.isDone = function isDone () {
-	  return false
-	};
-	InteriorIntersectionFinderAdder.prototype.getInteriorIntersections = function getInteriorIntersections () {
-	  return this._interiorIntersections
-	};
-	InteriorIntersectionFinderAdder.prototype.interfaces_ = function interfaces_ () {
-	  return [SegmentIntersector]
-	};
-	InteriorIntersectionFinderAdder.prototype.getClass = function getClass () {
-	  return InteriorIntersectionFinderAdder
-	};
+	    }; // exposes Hashes
 
-	var MCIndexSnapRounder = function MCIndexSnapRounder () {
-	  this._pm = null;
-	  this._li = null;
-	  this._scaleFactor = null;
-	  this._noder = null;
-	  this._pointSnapper = null;
-	  this._nodedSegStrings = null;
-	  var pm = arguments[0];
-	  this._pm = pm;
-	  this._li = new RobustLineIntersector();
-	  this._li.setPrecisionModel(pm);
-	  this._scaleFactor = pm.getScale();
-	};
-	MCIndexSnapRounder.prototype.checkCorrectness = function checkCorrectness (inputSegmentStrings) {
-	  var resultSegStrings = NodedSegmentString.getNodedSubstrings(inputSegmentStrings);
-	  var nv = new NodingValidator(resultSegStrings);
-	  try {
-	    nv.checkValid();
-	  } catch (ex) {
-	    if (ex instanceof Exception) {
-	      ex.printStackTrace();
-	    } else { throw ex }
-	  } finally {}
-	};
-	MCIndexSnapRounder.prototype.getNodedSubstrings = function getNodedSubstrings () {
-	  return NodedSegmentString.getNodedSubstrings(this._nodedSegStrings)
-	};
-	MCIndexSnapRounder.prototype.snapRound = function snapRound (segStrings, li) {
-	  var intersections = this.findInteriorIntersections(segStrings, li);
-	  this.computeIntersectionSnaps(intersections);
-	  this.computeVertexSnaps(segStrings);
-	};
-	MCIndexSnapRounder.prototype.findInteriorIntersections = function findInteriorIntersections (segStrings, li) {
-	  var intFinderAdder = new InteriorIntersectionFinderAdder(li);
-	  this._noder.setSegmentIntersector(intFinderAdder);
-	  this._noder.computeNodes(segStrings);
-	  return intFinderAdder.getInteriorIntersections()
-	};
-	MCIndexSnapRounder.prototype.computeVertexSnaps = function computeVertexSnaps () {
-	    var this$1 = this;
+	    (function (window, undefined$1) {
+	      var freeExports = false;
 
-	  if (hasInterface(arguments[0], Collection)) {
-	    var edges = arguments[0];
-	    for (var i0 = edges.iterator(); i0.hasNext();) {
-	      var edge0 = i0.next();
-	      this$1.computeVertexSnaps(edge0);
-	    }
-	  } else if (arguments[0] instanceof NodedSegmentString) {
-	    var e = arguments[0];
-	    var pts0 = e.getCoordinates();
-	    for (var i = 0; i < pts0.length; i++) {
-	      var hotPixel = new HotPixel(pts0[i], this$1._scaleFactor, this$1._li);
-	      var isNodeAdded = this$1._pointSnapper.snap(hotPixel, e, i);
-	      if (isNodeAdded) {
-	        e.addIntersection(pts0[i], i);
+	      {
+	        freeExports = exports;
+
+	        if (exports && _typeof(commonjsGlobal) === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
+	          window = commonjsGlobal;
+	        }
 	      }
-	    }
-	  }
-	};
-	MCIndexSnapRounder.prototype.computeNodes = function computeNodes (inputSegmentStrings) {
-	  this._nodedSegStrings = inputSegmentStrings;
-	  this._noder = new MCIndexNoder();
-	  this._pointSnapper = new MCIndexPointSnapper(this._noder.getIndex());
-	  this.snapRound(inputSegmentStrings, this._li);
-	};
-	MCIndexSnapRounder.prototype.computeIntersectionSnaps = function computeIntersectionSnaps (snapPts) {
-	    var this$1 = this;
 
-	  for (var it = snapPts.iterator(); it.hasNext();) {
-	    var snapPt = it.next();
-	    var hotPixel = new HotPixel(snapPt, this$1._scaleFactor, this$1._li);
-	    this$1._pointSnapper.snap(hotPixel);
-	  }
-	};
-	MCIndexSnapRounder.prototype.interfaces_ = function interfaces_ () {
-	  return [Noder]
-	};
-	MCIndexSnapRounder.prototype.getClass = function getClass () {
-	  return MCIndexSnapRounder
-	};
+	      if (typeof undefined$1 === 'function' && _typeof(undefined$1.amd) === 'object' && undefined$1.amd) {
+	        // define as an anonymous module, so, through path mapping, it can be aliased
+	        undefined$1(function () {
+	          return Hashes;
+	        });
+	      } else if (freeExports) {
+	        // in Node.js or RingoJS v0.8.0+
+	        if (module && module.exports === freeExports) {
+	          module.exports = Hashes;
+	        } // in Narwhal or RingoJS v0.7.0-
+	        else {
+	          freeExports.Hashes = Hashes;
+	        }
+	      } else {
+	        // in a browser or Rhino
+	        window.Hashes = Hashes;
+	      }
+	    })(this);
+	  })(); // IIFE
 
-	var BufferOp = function BufferOp () {
-	  this._argGeom = null;
-	  this._distance = null;
-	  this._bufParams = new BufferParameters();
-	  this._resultGeometry = null;
-	  this._saveException = null;
-	  if (arguments.length === 1) {
-	    var g = arguments[0];
-	    this._argGeom = g;
-	  } else if (arguments.length === 2) {
-	    var g$1 = arguments[0];
-	    var bufParams = arguments[1];
-	    this._argGeom = g$1;
-	    this._bufParams = bufParams;
-	  }
-	};
+	})(hashes$1, hashes$1.exports);
 
-	var staticAccessors$32 = { CAP_ROUND: { configurable: true },CAP_BUTT: { configurable: true },CAP_FLAT: { configurable: true },CAP_SQUARE: { configurable: true },MAX_PRECISION_DIGITS: { configurable: true } };
-	BufferOp.prototype.bufferFixedPrecision = function bufferFixedPrecision (fixedPM) {
-	  var noder = new ScaledNoder(new MCIndexSnapRounder(new PrecisionModel(1.0)), fixedPM.getScale());
-	  var bufBuilder = new BufferBuilder(this._bufParams);
-	  bufBuilder.setWorkingPrecisionModel(fixedPM);
-	  bufBuilder.setNoder(noder);
-	  this._resultGeometry = bufBuilder.buffer(this._argGeom, this._distance);
-	};
-	BufferOp.prototype.bufferReducedPrecision = function bufferReducedPrecision () {
-	    var this$1 = this;
+	var hashes = hashes$1.exports,
+	    sha1 = new hashes.SHA1(); // # xtend
 
-	  if (arguments.length === 0) {
-	    for (var precDigits = BufferOp.MAX_PRECISION_DIGITS; precDigits >= 0; precDigits--) {
-	      try {
-	        this$1.bufferReducedPrecision(precDigits);
-	      } catch (ex) {
-	        if (ex instanceof TopologyException) {
-	          this$1._saveException = ex;
-	        } else { throw ex }
-	      } finally {}
-	      if (this$1._resultGeometry !== null) { return null }
-	    }
-	    throw this._saveException
-	  } else if (arguments.length === 1) {
-	    var precisionDigits = arguments[0];
-	    var sizeBasedScaleFactor = BufferOp.precisionScaleFactor(this._argGeom, this._distance, precisionDigits);
-	    var fixedPM = new PrecisionModel(sizeBasedScaleFactor);
-	    this.bufferFixedPrecision(fixedPM);
-	  }
-	};
-	BufferOp.prototype.computeGeometry = function computeGeometry () {
-	  this.bufferOriginalPrecision();
-	  if (this._resultGeometry !== null) { return null }
-	  var argPM = this._argGeom.getFactory().getPrecisionModel();
-	  if (argPM.getType() === PrecisionModel.FIXED) { this.bufferFixedPrecision(argPM); } else { this.bufferReducedPrecision(); }
-	};
-	BufferOp.prototype.setQuadrantSegments = function setQuadrantSegments (quadrantSegments) {
-	  this._bufParams.setQuadrantSegments(quadrantSegments);
-	};
-	BufferOp.prototype.bufferOriginalPrecision = function bufferOriginalPrecision () {
-	  try {
-	    var bufBuilder = new BufferBuilder(this._bufParams);
-	    this._resultGeometry = bufBuilder.buffer(this._argGeom, this._distance);
-	  } catch (ex) {
-	    if (ex instanceof RuntimeException) {
-	      this._saveException = ex;
-	    } else { throw ex }
-	  } finally {}
-	};
-	BufferOp.prototype.getResultGeometry = function getResultGeometry (distance) {
-	  this._distance = distance;
-	  this.computeGeometry();
-	  return this._resultGeometry
-	};
-	BufferOp.prototype.setEndCapStyle = function setEndCapStyle (endCapStyle) {
-	  this._bufParams.setEndCapStyle(endCapStyle);
-	};
-	BufferOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferOp.prototype.getClass = function getClass () {
-	  return BufferOp
-	};
-	BufferOp.bufferOp = function bufferOp () {
-	  if (arguments.length === 2) {
-	    var g = arguments[0];
-	    var distance = arguments[1];
-	    var gBuf = new BufferOp(g);
-	    var geomBuf = gBuf.getResultGeometry(distance);
-	    return geomBuf
-	  } else if (arguments.length === 3) {
-	    if (Number.isInteger(arguments[2]) && (arguments[0] instanceof Geometry && typeof arguments[1] === 'number')) {
-	      var g$1 = arguments[0];
-	      var distance$1 = arguments[1];
-	      var quadrantSegments = arguments[2];
-	      var bufOp = new BufferOp(g$1);
-	      bufOp.setQuadrantSegments(quadrantSegments);
-	      var geomBuf$1 = bufOp.getResultGeometry(distance$1);
-	      return geomBuf$1
-	    } else if (arguments[2] instanceof BufferParameters && (arguments[0] instanceof Geometry && typeof arguments[1] === 'number')) {
-	      var g$2 = arguments[0];
-	      var distance$2 = arguments[1];
-	      var params = arguments[2];
-	      var bufOp$1 = new BufferOp(g$2, params);
-	      var geomBuf$2 = bufOp$1.getResultGeometry(distance$2);
-	      return geomBuf$2
-	    }
-	  } else if (arguments.length === 4) {
-	    var g$3 = arguments[0];
-	    var distance$3 = arguments[1];
-	    var quadrantSegments$1 = arguments[2];
-	    var endCapStyle = arguments[3];
-	    var bufOp$2 = new BufferOp(g$3);
-	    bufOp$2.setQuadrantSegments(quadrantSegments$1);
-	    bufOp$2.setEndCapStyle(endCapStyle);
-	    var geomBuf$3 = bufOp$2.getResultGeometry(distance$3);
-	    return geomBuf$3
-	  }
-	};
-	BufferOp.precisionScaleFactor = function precisionScaleFactor (g, distance, maxPrecisionDigits) {
-	  var env = g.getEnvelopeInternal();
-	  var envMax = MathUtil.max(Math.abs(env.getMaxX()), Math.abs(env.getMaxY()), Math.abs(env.getMinX()), Math.abs(env.getMinY()));
-	  var expandByDistance = distance > 0.0 ? distance : 0.0;
-	  var bufEnvMax = envMax + 2 * expandByDistance;
-	  var bufEnvPrecisionDigits = Math.trunc(Math.log(bufEnvMax) / Math.log(10) + 1.0);
-	  var minUnitLog10 = maxPrecisionDigits - bufEnvPrecisionDigits;
-	  var scaleFactor = Math.pow(10.0, minUnitLog10);
-	  return scaleFactor
-	};
-	staticAccessors$32.CAP_ROUND.get = function () { return BufferParameters.CAP_ROUND };
-	staticAccessors$32.CAP_BUTT.get = function () { return BufferParameters.CAP_FLAT };
-	staticAccessors$32.CAP_FLAT.get = function () { return BufferParameters.CAP_FLAT };
-	staticAccessors$32.CAP_SQUARE.get = function () { return BufferParameters.CAP_SQUARE };
-	staticAccessors$32.MAX_PRECISION_DIGITS.get = function () { return 12 };
-
-	Object.defineProperties( BufferOp, staticAccessors$32 );
-
-	var PointPairDistance = function PointPairDistance () {
-	  this._pt = [new Coordinate(), new Coordinate()];
-	  this._distance = Double.NaN;
-	  this._isNull = true;
-	};
-	PointPairDistance.prototype.getCoordinates = function getCoordinates () {
-	  return this._pt
-	};
-	PointPairDistance.prototype.getCoordinate = function getCoordinate (i) {
-	  return this._pt[i]
-	};
-	PointPairDistance.prototype.setMinimum = function setMinimum () {
-	  if (arguments.length === 1) {
-	    var ptDist = arguments[0];
-	    this.setMinimum(ptDist._pt[0], ptDist._pt[1]);
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    if (this._isNull) {
-	      this.initialize(p0, p1);
-	      return null
-	    }
-	    var dist = p0.distance(p1);
-	    if (dist < this._distance) { this.initialize(p0, p1, dist); }
-	  }
-	};
-	PointPairDistance.prototype.initialize = function initialize () {
-	  if (arguments.length === 0) {
-	    this._isNull = true;
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    this._pt[0].setCoordinate(p0);
-	    this._pt[1].setCoordinate(p1);
-	    this._distance = p0.distance(p1);
-	    this._isNull = false;
-	  } else if (arguments.length === 3) {
-	    var p0$1 = arguments[0];
-	    var p1$1 = arguments[1];
-	    var distance = arguments[2];
-	    this._pt[0].setCoordinate(p0$1);
-	    this._pt[1].setCoordinate(p1$1);
-	    this._distance = distance;
-	    this._isNull = false;
-	  }
-	};
-	PointPairDistance.prototype.getDistance = function getDistance () {
-	  return this._distance
-	};
-	PointPairDistance.prototype.setMaximum = function setMaximum () {
-	  if (arguments.length === 1) {
-	    var ptDist = arguments[0];
-	    this.setMaximum(ptDist._pt[0], ptDist._pt[1]);
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    if (this._isNull) {
-	      this.initialize(p0, p1);
-	      return null
-	    }
-	    var dist = p0.distance(p1);
-	    if (dist > this._distance) { this.initialize(p0, p1, dist); }
-	  }
-	};
-	PointPairDistance.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointPairDistance.prototype.getClass = function getClass () {
-	  return PointPairDistance
-	};
+	var hasOwnProperty$1 = Object.prototype.hasOwnProperty;
 
-	var DistanceToPointFinder = function DistanceToPointFinder () {};
+	function xtend$1() {
+	  var target = {};
 
-	DistanceToPointFinder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	DistanceToPointFinder.prototype.getClass = function getClass () {
-	  return DistanceToPointFinder
-	};
-	DistanceToPointFinder.computeDistance = function computeDistance () {
-	  if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof LineString && arguments[1] instanceof Coordinate)) {
-	    var line = arguments[0];
-	    var pt = arguments[1];
-	    var ptDist = arguments[2];
-	    var coords = line.getCoordinates();
-	    var tempSegment = new LineSegment();
-	    for (var i = 0; i < coords.length - 1; i++) {
-	      tempSegment.setCoordinates(coords[i], coords[i + 1]);
-	      var closestPt = tempSegment.closestPoint(pt);
-	      ptDist.setMinimum(closestPt, pt);
-	    }
-	  } else if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof Polygon && arguments[1] instanceof Coordinate)) {
-	    var poly = arguments[0];
-	    var pt$1 = arguments[1];
-	    var ptDist$1 = arguments[2];
-	    DistanceToPointFinder.computeDistance(poly.getExteriorRing(), pt$1, ptDist$1);
-	    for (var i$1 = 0; i$1 < poly.getNumInteriorRing(); i$1++) {
-	      DistanceToPointFinder.computeDistance(poly.getInteriorRingN(i$1), pt$1, ptDist$1);
-	    }
-	  } else if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof Geometry && arguments[1] instanceof Coordinate)) {
-	    var geom = arguments[0];
-	    var pt$2 = arguments[1];
-	    var ptDist$2 = arguments[2];
-	    if (geom instanceof LineString) {
-	      DistanceToPointFinder.computeDistance(geom, pt$2, ptDist$2);
-	    } else if (geom instanceof Polygon) {
-	      DistanceToPointFinder.computeDistance(geom, pt$2, ptDist$2);
-	    } else if (geom instanceof GeometryCollection) {
-	      var gc = geom;
-	      for (var i$2 = 0; i$2 < gc.getNumGeometries(); i$2++) {
-	        var g = gc.getGeometryN(i$2);
-	        DistanceToPointFinder.computeDistance(g, pt$2, ptDist$2);
+	  for (var i = 0; i < arguments.length; i++) {
+	    var source = arguments[i];
+
+	    for (var key in source) {
+	      if (hasOwnProperty$1.call(source, key)) {
+	        target[key] = source[key];
 	      }
-	    } else {
-	      ptDist$2.setMinimum(geom.getCoordinate(), pt$2);
 	    }
-	  } else if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof LineSegment && arguments[1] instanceof Coordinate)) {
-	    var segment = arguments[0];
-	    var pt$3 = arguments[1];
-	    var ptDist$3 = arguments[2];
-	    var closestPt$1 = segment.closestPoint(pt$3);
-	    ptDist$3.setMinimum(closestPt$1, pt$3);
 	  }
-	};
-
-	var BufferCurveMaximumDistanceFinder = function BufferCurveMaximumDistanceFinder (inputGeom) {
-	  this._maxPtDist = new PointPairDistance();
-	  this._inputGeom = inputGeom || null;
-	};
 
-	var staticAccessors$36 = { MaxPointDistanceFilter: { configurable: true },MaxMidpointDistanceFilter: { configurable: true } };
-	BufferCurveMaximumDistanceFinder.prototype.computeMaxMidpointDistance = function computeMaxMidpointDistance (curve) {
-	  var distFilter = new MaxMidpointDistanceFilter(this._inputGeom);
-	  curve.apply(distFilter);
-	  this._maxPtDist.setMaximum(distFilter.getMaxPointDistance());
-	};
-	BufferCurveMaximumDistanceFinder.prototype.computeMaxVertexDistance = function computeMaxVertexDistance (curve) {
-	  var distFilter = new MaxPointDistanceFilter(this._inputGeom);
-	  curve.apply(distFilter);
-	  this._maxPtDist.setMaximum(distFilter.getMaxPointDistance());
-	};
-	BufferCurveMaximumDistanceFinder.prototype.findDistance = function findDistance (bufferCurve) {
-	  this.computeMaxVertexDistance(bufferCurve);
-	  this.computeMaxMidpointDistance(bufferCurve);
-	  return this._maxPtDist.getDistance()
-	};
-	BufferCurveMaximumDistanceFinder.prototype.getDistancePoints = function getDistancePoints () {
-	  return this._maxPtDist
-	};
-	BufferCurveMaximumDistanceFinder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferCurveMaximumDistanceFinder.prototype.getClass = function getClass () {
-	  return BufferCurveMaximumDistanceFinder
-	};
-	staticAccessors$36.MaxPointDistanceFilter.get = function () { return MaxPointDistanceFilter };
-	staticAccessors$36.MaxMidpointDistanceFilter.get = function () { return MaxMidpointDistanceFilter };
+	  return target;
+	}
 
-	Object.defineProperties( BufferCurveMaximumDistanceFinder, staticAccessors$36 );
+	var ohauth$1 = {};
 
-	var MaxPointDistanceFilter = function MaxPointDistanceFilter (geom) {
-	  this._maxPtDist = new PointPairDistance();
-	  this._minPtDist = new PointPairDistance();
-	  this._geom = geom || null;
-	};
-	MaxPointDistanceFilter.prototype.filter = function filter (pt) {
-	  this._minPtDist.initialize();
-	  DistanceToPointFinder.computeDistance(this._geom, pt, this._minPtDist);
-	  this._maxPtDist.setMaximum(this._minPtDist);
-	};
-	MaxPointDistanceFilter.prototype.getMaxPointDistance = function getMaxPointDistance () {
-	  return this._maxPtDist
-	};
-	MaxPointDistanceFilter.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateFilter]
-	};
-	MaxPointDistanceFilter.prototype.getClass = function getClass () {
-	  return MaxPointDistanceFilter
+	ohauth$1.qsString = function (obj) {
+	  return Object.keys(obj).sort().map(function (key) {
+	    return ohauth$1.percentEncode(key) + '=' + ohauth$1.percentEncode(obj[key]);
+	  }).join('&');
 	};
 
-	var MaxMidpointDistanceFilter = function MaxMidpointDistanceFilter (geom) {
-	  this._maxPtDist = new PointPairDistance();
-	  this._minPtDist = new PointPairDistance();
-	  this._geom = geom || null;
-	};
-	MaxMidpointDistanceFilter.prototype.filter = function filter (seq, index) {
-	  if (index === 0) { return null }
-	  var p0 = seq.getCoordinate(index - 1);
-	  var p1 = seq.getCoordinate(index);
-	  var midPt = new Coordinate((p0.x + p1.x) / 2, (p0.y + p1.y) / 2);
-	  this._minPtDist.initialize();
-	  DistanceToPointFinder.computeDistance(this._geom, midPt, this._minPtDist);
-	  this._maxPtDist.setMaximum(this._minPtDist);
-	};
-	MaxMidpointDistanceFilter.prototype.isDone = function isDone () {
-	  return false
-	};
-	MaxMidpointDistanceFilter.prototype.isGeometryChanged = function isGeometryChanged () {
-	  return false
-	};
-	MaxMidpointDistanceFilter.prototype.getMaxPointDistance = function getMaxPointDistance () {
-	  return this._maxPtDist
-	};
-	MaxMidpointDistanceFilter.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateSequenceFilter]
-	};
-	MaxMidpointDistanceFilter.prototype.getClass = function getClass () {
-	  return MaxMidpointDistanceFilter
+	ohauth$1.stringQs = function (str) {
+	  return str.split('&').filter(function (pair) {
+	    return pair !== '';
+	  }).reduce(function (obj, pair) {
+	    var parts = pair.split('=');
+	    obj[decodeURIComponent(parts[0])] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
+	    return obj;
+	  }, {});
 	};
 
-	var PolygonExtracter = function PolygonExtracter (comps) {
-	  this._comps = comps || null;
-	};
-	PolygonExtracter.prototype.filter = function filter (geom) {
-	  if (geom instanceof Polygon) { this._comps.add(geom); }
-	};
-	PolygonExtracter.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryFilter]
-	};
-	PolygonExtracter.prototype.getClass = function getClass () {
-	  return PolygonExtracter
-	};
-	PolygonExtracter.getPolygons = function getPolygons () {
-	  if (arguments.length === 1) {
-	    var geom = arguments[0];
-	    return PolygonExtracter.getPolygons(geom, new ArrayList())
-	  } else if (arguments.length === 2) {
-	    var geom$1 = arguments[0];
-	    var list = arguments[1];
-	    if (geom$1 instanceof Polygon) {
-	      list.add(geom$1);
-	    } else if (geom$1 instanceof GeometryCollection) {
-	      geom$1.apply(new PolygonExtracter(list));
-	    }
-	    return list
-	  }
-	};
+	ohauth$1.rawxhr = function (method, url, data, headers, callback) {
+	  var xhr = new XMLHttpRequest(),
+	      twoHundred = /^20\d$/;
 
-	var LinearComponentExtracter = function LinearComponentExtracter () {
-	  this._lines = null;
-	  this._isForcedToLineString = false;
-	  if (arguments.length === 1) {
-	    var lines = arguments[0];
-	    this._lines = lines;
-	  } else if (arguments.length === 2) {
-	    var lines$1 = arguments[0];
-	    var isForcedToLineString = arguments[1];
-	    this._lines = lines$1;
-	    this._isForcedToLineString = isForcedToLineString;
-	  }
-	};
-	LinearComponentExtracter.prototype.filter = function filter (geom) {
-	  if (this._isForcedToLineString && geom instanceof LinearRing) {
-	    var line = geom.getFactory().createLineString(geom.getCoordinateSequence());
-	    this._lines.add(line);
-	    return null
-	  }
-	  if (geom instanceof LineString) { this._lines.add(geom); }
-	};
-	LinearComponentExtracter.prototype.setForceToLineString = function setForceToLineString (isForcedToLineString) {
-	  this._isForcedToLineString = isForcedToLineString;
-	};
-	LinearComponentExtracter.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryComponentFilter]
-	};
-	LinearComponentExtracter.prototype.getClass = function getClass () {
-	  return LinearComponentExtracter
-	};
-	LinearComponentExtracter.getGeometry = function getGeometry () {
-	  if (arguments.length === 1) {
-	    var geom = arguments[0];
-	    return geom.getFactory().buildGeometry(LinearComponentExtracter.getLines(geom))
-	  } else if (arguments.length === 2) {
-	    var geom$1 = arguments[0];
-	    var forceToLineString = arguments[1];
-	    return geom$1.getFactory().buildGeometry(LinearComponentExtracter.getLines(geom$1, forceToLineString))
-	  }
-	};
-	LinearComponentExtracter.getLines = function getLines () {
-	  if (arguments.length === 1) {
-	    var geom = arguments[0];
-	    return LinearComponentExtracter.getLines(geom, false)
-	  } else if (arguments.length === 2) {
-	    if (hasInterface(arguments[0], Collection) && hasInterface(arguments[1], Collection)) {
-	      var geoms = arguments[0];
-	      var lines$1 = arguments[1];
-	      for (var i = geoms.iterator(); i.hasNext();) {
-	        var g = i.next();
-	        LinearComponentExtracter.getLines(g, lines$1);
-	      }
-	      return lines$1
-	    } else if (arguments[0] instanceof Geometry && typeof arguments[1] === 'boolean') {
-	      var geom$1 = arguments[0];
-	      var forceToLineString = arguments[1];
-	      var lines = new ArrayList();
-	      geom$1.apply(new LinearComponentExtracter(lines, forceToLineString));
-	      return lines
-	    } else if (arguments[0] instanceof Geometry && hasInterface(arguments[1], Collection)) {
-	      var geom$2 = arguments[0];
-	      var lines$2 = arguments[1];
-	      if (geom$2 instanceof LineString) {
-	        lines$2.add(geom$2);
-	      } else {
-	        geom$2.apply(new LinearComponentExtracter(lines$2));
-	      }
-	      return lines$2
+	  xhr.onreadystatechange = function () {
+	    if (4 === xhr.readyState && 0 !== xhr.status) {
+	      if (twoHundred.test(xhr.status)) callback(null, xhr);else return callback(xhr, null);
 	    }
-	  } else if (arguments.length === 3) {
-	    if (typeof arguments[2] === 'boolean' && (hasInterface(arguments[0], Collection) && hasInterface(arguments[1], Collection))) {
-	      var geoms$1 = arguments[0];
-	      var lines$3 = arguments[1];
-	      var forceToLineString$1 = arguments[2];
-	      for (var i$1 = geoms$1.iterator(); i$1.hasNext();) {
-	        var g$1 = i$1.next();
-	        LinearComponentExtracter.getLines(g$1, lines$3, forceToLineString$1);
-	      }
-	      return lines$3
-	    } else if (typeof arguments[2] === 'boolean' && (arguments[0] instanceof Geometry && hasInterface(arguments[1], Collection))) {
-	      var geom$3 = arguments[0];
-	      var lines$4 = arguments[1];
-	      var forceToLineString$2 = arguments[2];
-	      geom$3.apply(new LinearComponentExtracter(lines$4, forceToLineString$2));
-	      return lines$4
-	    }
-	  }
-	};
+	  };
 
-	var PointLocator = function PointLocator () {
-	  this._boundaryRule = BoundaryNodeRule.OGC_SFS_BOUNDARY_RULE;
-	  this._isIn = null;
-	  this._numBoundaries = null;
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var boundaryRule = arguments[0];
-	    if (boundaryRule === null) { throw new IllegalArgumentException('Rule must be non-null') }
-	    this._boundaryRule = boundaryRule;
-	  }
-	};
-	PointLocator.prototype.locateInternal = function locateInternal () {
-	    var this$1 = this;
-
-	  if (arguments[0] instanceof Coordinate && arguments[1] instanceof Polygon) {
-	    var p = arguments[0];
-	    var poly = arguments[1];
-	    if (poly.isEmpty()) { return Location.EXTERIOR }
-	    var shell = poly.getExteriorRing();
-	    var shellLoc = this.locateInPolygonRing(p, shell);
-	    if (shellLoc === Location.EXTERIOR) { return Location.EXTERIOR }
-	    if (shellLoc === Location.BOUNDARY) { return Location.BOUNDARY }
-	    for (var i = 0; i < poly.getNumInteriorRing(); i++) {
-	      var hole = poly.getInteriorRingN(i);
-	      var holeLoc = this$1.locateInPolygonRing(p, hole);
-	      if (holeLoc === Location.INTERIOR) { return Location.EXTERIOR }
-	      if (holeLoc === Location.BOUNDARY) { return Location.BOUNDARY }
-	    }
-	    return Location.INTERIOR
-	  } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof LineString) {
-	    var p$1 = arguments[0];
-	    var l = arguments[1];
-	    if (!l.getEnvelopeInternal().intersects(p$1)) { return Location.EXTERIOR }
-	    var pt = l.getCoordinates();
-	    if (!l.isClosed()) {
-	      if (p$1.equals(pt[0]) || p$1.equals(pt[pt.length - 1])) {
-	        return Location.BOUNDARY
-	      }
-	    }
-	    if (CGAlgorithms.isOnLine(p$1, pt)) { return Location.INTERIOR }
-	    return Location.EXTERIOR
-	  } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Point$1) {
-	    var p$2 = arguments[0];
-	    var pt$1 = arguments[1];
-	    var ptCoord = pt$1.getCoordinate();
-	    if (ptCoord.equals2D(p$2)) { return Location.INTERIOR }
-	    return Location.EXTERIOR
-	  }
-	};
-	PointLocator.prototype.locateInPolygonRing = function locateInPolygonRing (p, ring) {
-	  if (!ring.getEnvelopeInternal().intersects(p)) { return Location.EXTERIOR }
-	  return CGAlgorithms.locatePointInRing(p, ring.getCoordinates())
-	};
-	PointLocator.prototype.intersects = function intersects (p, geom) {
-	  return this.locate(p, geom) !== Location.EXTERIOR
-	};
-	PointLocator.prototype.updateLocationInfo = function updateLocationInfo (loc) {
-	  if (loc === Location.INTERIOR) { this._isIn = true; }
-	  if (loc === Location.BOUNDARY) { this._numBoundaries++; }
-	};
-	PointLocator.prototype.computeLocation = function computeLocation (p, geom) {
-	    var this$1 = this;
-
-	  if (geom instanceof Point$1) {
-	    this.updateLocationInfo(this.locateInternal(p, geom));
-	  }
-	  if (geom instanceof LineString) {
-	    this.updateLocationInfo(this.locateInternal(p, geom));
-	  } else if (geom instanceof Polygon) {
-	    this.updateLocationInfo(this.locateInternal(p, geom));
-	  } else if (geom instanceof MultiLineString) {
-	    var ml = geom;
-	    for (var i = 0; i < ml.getNumGeometries(); i++) {
-	      var l = ml.getGeometryN(i);
-	      this$1.updateLocationInfo(this$1.locateInternal(p, l));
-	    }
-	  } else if (geom instanceof MultiPolygon) {
-	    var mpoly = geom;
-	    for (var i$1 = 0; i$1 < mpoly.getNumGeometries(); i$1++) {
-	      var poly = mpoly.getGeometryN(i$1);
-	      this$1.updateLocationInfo(this$1.locateInternal(p, poly));
-	    }
-	  } else if (geom instanceof GeometryCollection) {
-	    var geomi = new GeometryCollectionIterator(geom);
-	    while (geomi.hasNext()) {
-	      var g2 = geomi.next();
-	      if (g2 !== geom) { this$1.computeLocation(p, g2); }
-	    }
+	  xhr.onerror = function (e) {
+	    return callback(e, null);
+	  };
+
+	  xhr.open(method, url, true);
+
+	  for (var h in headers) {
+	    xhr.setRequestHeader(h, headers[h]);
 	  }
+
+	  xhr.send(data);
+	  return xhr;
 	};
-	PointLocator.prototype.locate = function locate (p, geom) {
-	  if (geom.isEmpty()) { return Location.EXTERIOR }
-	  if (geom instanceof LineString) {
-	    return this.locateInternal(p, geom)
-	  } else if (geom instanceof Polygon) {
-	    return this.locateInternal(p, geom)
-	  }
-	  this._isIn = false;
-	  this._numBoundaries = 0;
-	  this.computeLocation(p, geom);
-	  if (this._boundaryRule.isInBoundary(this._numBoundaries)) { return Location.BOUNDARY }
-	  if (this._numBoundaries > 0 || this._isIn) { return Location.INTERIOR }
-	  return Location.EXTERIOR
-	};
-	PointLocator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointLocator.prototype.getClass = function getClass () {
-	  return PointLocator
+
+	ohauth$1.xhr = function (method, url, auth, data, options, callback) {
+	  var headers = options && options.header || {
+	    'Content-Type': 'application/x-www-form-urlencoded'
+	  };
+	  headers.Authorization = 'OAuth ' + ohauth$1.authHeader(auth);
+	  return ohauth$1.rawxhr(method, url, data, headers, callback);
 	};
 
-	var GeometryLocation = function GeometryLocation () {
-	  this._component = null;
-	  this._segIndex = null;
-	  this._pt = null;
-	  if (arguments.length === 2) {
-	    var component = arguments[0];
-	    var pt = arguments[1];
-	    GeometryLocation.call(this, component, GeometryLocation.INSIDE_AREA, pt);
-	  } else if (arguments.length === 3) {
-	    var component$1 = arguments[0];
-	    var segIndex = arguments[1];
-	    var pt$1 = arguments[2];
-	    this._component = component$1;
-	    this._segIndex = segIndex;
-	    this._pt = pt$1;
+	ohauth$1.nonce = function () {
+	  for (var o = ''; o.length < 6;) {
+	    o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
 	  }
-	};
 
-	var staticAccessors$38 = { INSIDE_AREA: { configurable: true } };
-	GeometryLocation.prototype.isInsideArea = function isInsideArea () {
-	  return this._segIndex === GeometryLocation.INSIDE_AREA
+	  return o;
 	};
-	GeometryLocation.prototype.getCoordinate = function getCoordinate () {
-	  return this._pt
+
+	ohauth$1.authHeader = function (obj) {
+	  return Object.keys(obj).sort().map(function (key) {
+	    return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
+	  }).join(', ');
 	};
-	GeometryLocation.prototype.getGeometryComponent = function getGeometryComponent () {
-	  return this._component
+
+	ohauth$1.timestamp = function () {
+	  return ~~(+new Date() / 1000);
 	};
-	GeometryLocation.prototype.getSegmentIndex = function getSegmentIndex () {
-	  return this._segIndex
+
+	ohauth$1.percentEncode = function (s) {
+	  return encodeURIComponent(s).replace(/\!/g, '%21').replace(/\'/g, '%27').replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
 	};
-	GeometryLocation.prototype.interfaces_ = function interfaces_ () {
-	  return []
+
+	ohauth$1.baseString = function (method, url, params) {
+	  if (params.oauth_signature) delete params.oauth_signature;
+	  return [method, ohauth$1.percentEncode(url), ohauth$1.percentEncode(ohauth$1.qsString(params))].join('&');
 	};
-	GeometryLocation.prototype.getClass = function getClass () {
-	  return GeometryLocation
+
+	ohauth$1.signature = function (oauth_secret, token_secret, baseString) {
+	  return sha1.b64_hmac(ohauth$1.percentEncode(oauth_secret) + '&' + ohauth$1.percentEncode(token_secret), baseString);
 	};
-	staticAccessors$38.INSIDE_AREA.get = function () { return -1 };
+	/**
+	 * Takes an options object for configuration (consumer_key,
+	 * consumer_secret, version, signature_method, token, token_secret)
+	 * and returns a function that generates the Authorization header
+	 * for given data.
+	 *
+	 * The returned function takes these parameters:
+	 * - method: GET/POST/...
+	 * - uri: full URI with protocol, port, path and query string
+	 * - extra_params: any extra parameters (that are passed in the POST data),
+	 *   can be an object or a from-urlencoded string.
+	 *
+	 * Returned function returns full OAuth header with "OAuth" string in it.
+	 */
 
-	Object.defineProperties( GeometryLocation, staticAccessors$38 );
 
-	var PointExtracter = function PointExtracter (pts) {
-	  this._pts = pts || null;
-	};
-	PointExtracter.prototype.filter = function filter (geom) {
-	  if (geom instanceof Point$1) { this._pts.add(geom); }
-	};
-	PointExtracter.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryFilter]
-	};
-	PointExtracter.prototype.getClass = function getClass () {
-	  return PointExtracter
-	};
-	PointExtracter.getPoints = function getPoints () {
-	  if (arguments.length === 1) {
-	    var geom = arguments[0];
-	    if (geom instanceof Point$1) {
-	      return Collections.singletonList(geom)
-	    }
-	    return PointExtracter.getPoints(geom, new ArrayList())
-	  } else if (arguments.length === 2) {
-	    var geom$1 = arguments[0];
-	    var list = arguments[1];
-	    if (geom$1 instanceof Point$1) {
-	      list.add(geom$1);
-	    } else if (geom$1 instanceof GeometryCollection) {
-	      geom$1.apply(new PointExtracter(list));
+	ohauth$1.headerGenerator = function (options) {
+	  options = options || {};
+	  var consumer_key = options.consumer_key || '',
+	      consumer_secret = options.consumer_secret || '',
+	      signature_method = options.signature_method || 'HMAC-SHA1',
+	      version = options.version || '1.0',
+	      token = options.token || '',
+	      token_secret = options.token_secret || '';
+	  return function (method, uri, extra_params) {
+	    method = method.toUpperCase();
+
+	    if (typeof extra_params === 'string' && extra_params.length > 0) {
+	      extra_params = ohauth$1.stringQs(extra_params);
 	    }
-	    return list
-	  }
-	};
 
-	var ConnectedElementLocationFilter = function ConnectedElementLocationFilter () {
-	  this._locations = null;
-	  var locations = arguments[0];
-	  this._locations = locations;
-	};
-	ConnectedElementLocationFilter.prototype.filter = function filter (geom) {
-	  if (geom instanceof Point$1 || geom instanceof LineString || geom instanceof Polygon) { this._locations.add(new GeometryLocation(geom, 0, geom.getCoordinate())); }
-	};
-	ConnectedElementLocationFilter.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryFilter]
-	};
-	ConnectedElementLocationFilter.prototype.getClass = function getClass () {
-	  return ConnectedElementLocationFilter
-	};
-	ConnectedElementLocationFilter.getLocations = function getLocations (geom) {
-	  var locations = new ArrayList();
-	  geom.apply(new ConnectedElementLocationFilter(locations));
-	  return locations
+	    var uri_parts = uri.split('?', 2),
+	        base_uri = uri_parts[0];
+	    var query_params = uri_parts.length === 2 ? ohauth$1.stringQs(uri_parts[1]) : {};
+	    var oauth_params = {
+	      oauth_consumer_key: consumer_key,
+	      oauth_signature_method: signature_method,
+	      oauth_version: version,
+	      oauth_timestamp: ohauth$1.timestamp(),
+	      oauth_nonce: ohauth$1.nonce()
+	    };
+	    if (token) oauth_params.oauth_token = token;
+	    var all_params = xtend$1({}, oauth_params, query_params, extra_params),
+	        base_str = ohauth$1.baseString(method, base_uri, all_params);
+	    oauth_params.oauth_signature = ohauth$1.signature(consumer_secret, token_secret, base_str);
+	    return 'OAuth ' + ohauth$1.authHeader(oauth_params);
+	  };
 	};
 
-	var DistanceOp = function DistanceOp () {
-	  this._geom = null;
-	  this._terminateDistance = 0.0;
-	  this._ptLocator = new PointLocator();
-	  this._minDistanceLocation = null;
-	  this._minDistance = Double.MAX_VALUE;
-	  if (arguments.length === 2) {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    this._geom = [g0, g1];
-	    this._terminateDistance = 0.0;
-	  } else if (arguments.length === 3) {
-	    var g0$1 = arguments[0];
-	    var g1$1 = arguments[1];
-	    var terminateDistance = arguments[2];
-	    this._geom = new Array(2).fill(null);
-	    this._geom[0] = g0$1;
-	    this._geom[1] = g1$1;
-	    this._terminateDistance = terminateDistance;
-	  }
-	};
-	DistanceOp.prototype.computeContainmentDistance = function computeContainmentDistance () {
-	    var this$1 = this;
-
-	  if (arguments.length === 0) {
-	    var locPtPoly = new Array(2).fill(null);
-	    this.computeContainmentDistance(0, locPtPoly);
-	    if (this._minDistance <= this._terminateDistance) { return null }
-	    this.computeContainmentDistance(1, locPtPoly);
-	  } else if (arguments.length === 2) {
-	    var polyGeomIndex = arguments[0];
-	    var locPtPoly$1 = arguments[1];
-	    var locationsIndex = 1 - polyGeomIndex;
-	    var polys = PolygonExtracter.getPolygons(this._geom[polyGeomIndex]);
-	    if (polys.size() > 0) {
-	      var insideLocs = ConnectedElementLocationFilter.getLocations(this._geom[locationsIndex]);
-	      this.computeContainmentDistance(insideLocs, polys, locPtPoly$1);
-	      if (this._minDistance <= this._terminateDistance) {
-	        this._minDistanceLocation[locationsIndex] = locPtPoly$1[0];
-	        this._minDistanceLocation[polyGeomIndex] = locPtPoly$1[1];
-	        return null
-	      }
-	    }
-	  } else if (arguments.length === 3) {
-	    if (arguments[2] instanceof Array && (hasInterface(arguments[0], List) && hasInterface(arguments[1], List))) {
-	      var locs = arguments[0];
-	      var polys$1 = arguments[1];
-	      var locPtPoly$2 = arguments[2];
-	      for (var i = 0; i < locs.size(); i++) {
-	        var loc = locs.get(i);
-	        for (var j = 0; j < polys$1.size(); j++) {
-	          this$1.computeContainmentDistance(loc, polys$1.get(j), locPtPoly$2);
-	          if (this$1._minDistance <= this$1._terminateDistance) { return null }
-	        }
-	      }
-	    } else if (arguments[2] instanceof Array && (arguments[0] instanceof GeometryLocation && arguments[1] instanceof Polygon)) {
-	      var ptLoc = arguments[0];
-	      var poly = arguments[1];
-	      var locPtPoly$3 = arguments[2];
-	      var pt = ptLoc.getCoordinate();
-	      if (Location.EXTERIOR !== this._ptLocator.locate(pt, poly)) {
-	        this._minDistance = 0.0;
-	        locPtPoly$3[0] = ptLoc;
-	        locPtPoly$3[1] = new GeometryLocation(poly, pt);
-
-	        return null
-	      }
-	    }
-	  }
-	};
-	DistanceOp.prototype.computeMinDistanceLinesPoints = function computeMinDistanceLinesPoints (lines, points, locGeom) {
-	    var this$1 = this;
+	var ohauth_1 = ohauth$1;
 
-	  for (var i = 0; i < lines.size(); i++) {
-	    var line = lines.get(i);
-	    for (var j = 0; j < points.size(); j++) {
-	      var pt = points.get(j);
-	      this$1.computeMinDistance(line, pt, locGeom);
-	      if (this$1._minDistance <= this$1._terminateDistance) { return null }
-	    }
-	  }
-	};
-	DistanceOp.prototype.computeFacetDistance = function computeFacetDistance () {
-	  var locGeom = new Array(2).fill(null);
-	  var lines0 = LinearComponentExtracter.getLines(this._geom[0]);
-	  var lines1 = LinearComponentExtracter.getLines(this._geom[1]);
-	  var pts0 = PointExtracter.getPoints(this._geom[0]);
-	  var pts1 = PointExtracter.getPoints(this._geom[1]);
-	  this.computeMinDistanceLines(lines0, lines1, locGeom);
-	  this.updateMinDistance(locGeom, false);
-	  if (this._minDistance <= this._terminateDistance) { return null }
-	  locGeom[0] = null;
-	  locGeom[1] = null;
-	  this.computeMinDistanceLinesPoints(lines0, pts1, locGeom);
-	  this.updateMinDistance(locGeom, false);
-	  if (this._minDistance <= this._terminateDistance) { return null }
-	  locGeom[0] = null;
-	  locGeom[1] = null;
-	  this.computeMinDistanceLinesPoints(lines1, pts0, locGeom);
-	  this.updateMinDistance(locGeom, true);
-	  if (this._minDistance <= this._terminateDistance) { return null }
-	  locGeom[0] = null;
-	  locGeom[1] = null;
-	  this.computeMinDistancePoints(pts0, pts1, locGeom);
-	  this.updateMinDistance(locGeom, false);
-	};
-	DistanceOp.prototype.nearestLocations = function nearestLocations () {
-	  this.computeMinDistance();
-	  return this._minDistanceLocation
-	};
-	DistanceOp.prototype.updateMinDistance = function updateMinDistance (locGeom, flip) {
-	  if (locGeom[0] === null) { return null }
-	  if (flip) {
-	    this._minDistanceLocation[0] = locGeom[1];
-	    this._minDistanceLocation[1] = locGeom[0];
-	  } else {
-	    this._minDistanceLocation[0] = locGeom[0];
-	    this._minDistanceLocation[1] = locGeom[1];
-	  }
-	};
-	DistanceOp.prototype.nearestPoints = function nearestPoints () {
-	  this.computeMinDistance();
-	  var nearestPts = [this._minDistanceLocation[0].getCoordinate(), this._minDistanceLocation[1].getCoordinate()];
-	  return nearestPts
-	};
-	DistanceOp.prototype.computeMinDistance = function computeMinDistance () {
-	    var this$1 = this;
-
-	  if (arguments.length === 0) {
-	    if (this._minDistanceLocation !== null) { return null }
-	    this._minDistanceLocation = new Array(2).fill(null);
-	    this.computeContainmentDistance();
-	    if (this._minDistance <= this._terminateDistance) { return null }
-	    this.computeFacetDistance();
-	  } else if (arguments.length === 3) {
-	    if (arguments[2] instanceof Array && (arguments[0] instanceof LineString && arguments[1] instanceof Point$1)) {
-	      var line = arguments[0];
-	      var pt = arguments[1];
-	      var locGeom = arguments[2];
-	      if (line.getEnvelopeInternal().distance(pt.getEnvelopeInternal()) > this._minDistance) { return null }
-	      var coord0 = line.getCoordinates();
-	      var coord = pt.getCoordinate();
-	      for (var i = 0; i < coord0.length - 1; i++) {
-	        var dist = CGAlgorithms.distancePointLine(coord, coord0[i], coord0[i + 1]);
-	        if (dist < this$1._minDistance) {
-	          this$1._minDistance = dist;
-	          var seg = new LineSegment(coord0[i], coord0[i + 1]);
-	          var segClosestPoint = seg.closestPoint(coord);
-	          locGeom[0] = new GeometryLocation(line, i, segClosestPoint);
-	          locGeom[1] = new GeometryLocation(pt, 0, coord);
-	        }
-	        if (this$1._minDistance <= this$1._terminateDistance) { return null }
-	      }
-	    } else if (arguments[2] instanceof Array && (arguments[0] instanceof LineString && arguments[1] instanceof LineString)) {
-	      var line0 = arguments[0];
-	      var line1 = arguments[1];
-	      var locGeom$1 = arguments[2];
-	      if (line0.getEnvelopeInternal().distance(line1.getEnvelopeInternal()) > this._minDistance) { return null }
-	      var coord0$1 = line0.getCoordinates();
-	      var coord1 = line1.getCoordinates();
-	      for (var i$1 = 0; i$1 < coord0$1.length - 1; i$1++) {
-	        for (var j = 0; j < coord1.length - 1; j++) {
-	          var dist$1 = CGAlgorithms.distanceLineLine(coord0$1[i$1], coord0$1[i$1 + 1], coord1[j], coord1[j + 1]);
-	          if (dist$1 < this$1._minDistance) {
-	            this$1._minDistance = dist$1;
-	            var seg0 = new LineSegment(coord0$1[i$1], coord0$1[i$1 + 1]);
-	            var seg1 = new LineSegment(coord1[j], coord1[j + 1]);
-	            var closestPt = seg0.closestPoints(seg1);
-	            locGeom$1[0] = new GeometryLocation(line0, i$1, closestPt[0]);
-	            locGeom$1[1] = new GeometryLocation(line1, j, closestPt[1]);
-	          }
-	          if (this$1._minDistance <= this$1._terminateDistance) { return null }
-	        }
-	      }
+	var resolveUrl$1 = {exports: {}};
+
+	(function (module, exports) {
+	  // Copyright 2014 Simon Lydell
+	  // X11 (“MIT”) Licensed. (See LICENSE.)
+	  void function (root, factory) {
+	    {
+	      module.exports = factory();
 	    }
-	  }
-	};
-	DistanceOp.prototype.computeMinDistancePoints = function computeMinDistancePoints (points0, points1, locGeom) {
-	    var this$1 = this;
+	  }(commonjsGlobal, function () {
+	    function
+	      /* ...urls */
+	    resolveUrl() {
+	      var numUrls = arguments.length;
 
-	  for (var i = 0; i < points0.size(); i++) {
-	    var pt0 = points0.get(i);
-	    for (var j = 0; j < points1.size(); j++) {
-	      var pt1 = points1.get(j);
-	      var dist = pt0.getCoordinate().distance(pt1.getCoordinate());
-	      if (dist < this$1._minDistance) {
-	        this$1._minDistance = dist;
-	        locGeom[0] = new GeometryLocation(pt0, 0, pt0.getCoordinate());
-	        locGeom[1] = new GeometryLocation(pt1, 0, pt1.getCoordinate());
+	      if (numUrls === 0) {
+	        throw new Error("resolveUrl requires at least one argument; got none.");
 	      }
-	      if (this$1._minDistance <= this$1._terminateDistance) { return null }
-	    }
-	  }
-	};
-	DistanceOp.prototype.distance = function distance () {
-	  if (this._geom[0] === null || this._geom[1] === null) { throw new IllegalArgumentException('null geometries are not supported') }
-	  if (this._geom[0].isEmpty() || this._geom[1].isEmpty()) { return 0.0 }
-	  this.computeMinDistance();
-	  return this._minDistance
-	};
-	DistanceOp.prototype.computeMinDistanceLines = function computeMinDistanceLines (lines0, lines1, locGeom) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < lines0.size(); i++) {
-	    var line0 = lines0.get(i);
-	    for (var j = 0; j < lines1.size(); j++) {
-	      var line1 = lines1.get(j);
-	      this$1.computeMinDistance(line0, line1, locGeom);
-	      if (this$1._minDistance <= this$1._terminateDistance) { return null }
-	    }
-	  }
-	};
-	DistanceOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	DistanceOp.prototype.getClass = function getClass () {
-	  return DistanceOp
-	};
-	DistanceOp.distance = function distance (g0, g1) {
-	  var distOp = new DistanceOp(g0, g1);
-	  return distOp.distance()
-	};
-	DistanceOp.isWithinDistance = function isWithinDistance (g0, g1, distance) {
-	  var distOp = new DistanceOp(g0, g1, distance);
-	  return distOp.distance() <= distance
-	};
-	DistanceOp.nearestPoints = function nearestPoints (g0, g1) {
-	  var distOp = new DistanceOp(g0, g1);
-	  return distOp.nearestPoints()
-	};
+	      var base = document.createElement("base");
+	      base.href = arguments[0];
 
-	var PointPairDistance$2 = function PointPairDistance () {
-	  this._pt = [new Coordinate(), new Coordinate()];
-	  this._distance = Double.NaN;
-	  this._isNull = true;
-	};
-	PointPairDistance$2.prototype.getCoordinates = function getCoordinates () {
-	  return this._pt
-	};
-	PointPairDistance$2.prototype.getCoordinate = function getCoordinate (i) {
-	  return this._pt[i]
-	};
-	PointPairDistance$2.prototype.setMinimum = function setMinimum () {
-	  if (arguments.length === 1) {
-	    var ptDist = arguments[0];
-	    this.setMinimum(ptDist._pt[0], ptDist._pt[1]);
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    if (this._isNull) {
-	      this.initialize(p0, p1);
-	      return null
-	    }
-	    var dist = p0.distance(p1);
-	    if (dist < this._distance) { this.initialize(p0, p1, dist); }
-	  }
-	};
-	PointPairDistance$2.prototype.initialize = function initialize () {
-	  if (arguments.length === 0) {
-	    this._isNull = true;
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    this._pt[0].setCoordinate(p0);
-	    this._pt[1].setCoordinate(p1);
-	    this._distance = p0.distance(p1);
-	    this._isNull = false;
-	  } else if (arguments.length === 3) {
-	    var p0$1 = arguments[0];
-	    var p1$1 = arguments[1];
-	    var distance = arguments[2];
-	    this._pt[0].setCoordinate(p0$1);
-	    this._pt[1].setCoordinate(p1$1);
-	    this._distance = distance;
-	    this._isNull = false;
-	  }
-	};
-	PointPairDistance$2.prototype.toString = function toString () {
-	  return WKTWriter.toLineString(this._pt[0], this._pt[1])
-	};
-	PointPairDistance$2.prototype.getDistance = function getDistance () {
-	  return this._distance
-	};
-	PointPairDistance$2.prototype.setMaximum = function setMaximum () {
-	  if (arguments.length === 1) {
-	    var ptDist = arguments[0];
-	    this.setMaximum(ptDist._pt[0], ptDist._pt[1]);
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    if (this._isNull) {
-	      this.initialize(p0, p1);
-	      return null
-	    }
-	    var dist = p0.distance(p1);
-	    if (dist > this._distance) { this.initialize(p0, p1, dist); }
-	  }
-	};
-	PointPairDistance$2.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointPairDistance$2.prototype.getClass = function getClass () {
-	  return PointPairDistance$2
-	};
+	      if (numUrls === 1) {
+	        return base.href;
+	      }
 
-	var DistanceToPoint = function DistanceToPoint () {};
+	      var head = document.getElementsByTagName("head")[0];
+	      head.insertBefore(base, head.firstChild);
+	      var a = document.createElement("a");
+	      var resolved;
 
-	DistanceToPoint.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	DistanceToPoint.prototype.getClass = function getClass () {
-	  return DistanceToPoint
-	};
-	DistanceToPoint.computeDistance = function computeDistance () {
-	  if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof LineString && arguments[1] instanceof Coordinate)) {
-	    var line = arguments[0];
-	    var pt = arguments[1];
-	    var ptDist = arguments[2];
-	    var tempSegment = new LineSegment();
-	    var coords = line.getCoordinates();
-	    for (var i = 0; i < coords.length - 1; i++) {
-	      tempSegment.setCoordinates(coords[i], coords[i + 1]);
-	      var closestPt = tempSegment.closestPoint(pt);
-	      ptDist.setMinimum(closestPt, pt);
-	    }
-	  } else if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof Polygon && arguments[1] instanceof Coordinate)) {
-	    var poly = arguments[0];
-	    var pt$1 = arguments[1];
-	    var ptDist$1 = arguments[2];
-	    DistanceToPoint.computeDistance(poly.getExteriorRing(), pt$1, ptDist$1);
-	    for (var i$1 = 0; i$1 < poly.getNumInteriorRing(); i$1++) {
-	      DistanceToPoint.computeDistance(poly.getInteriorRingN(i$1), pt$1, ptDist$1);
-	    }
-	  } else if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof Geometry && arguments[1] instanceof Coordinate)) {
-	    var geom = arguments[0];
-	    var pt$2 = arguments[1];
-	    var ptDist$2 = arguments[2];
-	    if (geom instanceof LineString) {
-	      DistanceToPoint.computeDistance(geom, pt$2, ptDist$2);
-	    } else if (geom instanceof Polygon) {
-	      DistanceToPoint.computeDistance(geom, pt$2, ptDist$2);
-	    } else if (geom instanceof GeometryCollection) {
-	      var gc = geom;
-	      for (var i$2 = 0; i$2 < gc.getNumGeometries(); i$2++) {
-	        var g = gc.getGeometryN(i$2);
-	        DistanceToPoint.computeDistance(g, pt$2, ptDist$2);
+	      for (var index = 1; index < numUrls; index++) {
+	        a.href = arguments[index];
+	        resolved = a.href;
+	        base.href = resolved;
 	      }
-	    } else {
-	      ptDist$2.setMinimum(geom.getCoordinate(), pt$2);
+
+	      head.removeChild(base);
+	      return resolved;
 	    }
-	  } else if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof LineSegment && arguments[1] instanceof Coordinate)) {
-	    var segment = arguments[0];
-	    var pt$3 = arguments[1];
-	    var ptDist$3 = arguments[2];
-	    var closestPt$1 = segment.closestPoint(pt$3);
-	    ptDist$3.setMinimum(closestPt$1, pt$3);
-	  }
-	};
 
-	var DiscreteHausdorffDistance = function DiscreteHausdorffDistance () {
-	  this._g0 = null;
-	  this._g1 = null;
-	  this._ptDist = new PointPairDistance$2();
-	  this._densifyFrac = 0.0;
-	  var g0 = arguments[0];
-	  var g1 = arguments[1];
-	  this._g0 = g0;
-	  this._g1 = g1;
+	    return resolveUrl;
+	  });
+	})(resolveUrl$1);
+
+	var assign = make_assign();
+	var create$1 = make_create();
+	var trim$1 = make_trim();
+	var Global$5 = typeof window !== 'undefined' ? window : commonjsGlobal;
+	var util$6 = {
+	  assign: assign,
+	  create: create$1,
+	  trim: trim$1,
+	  bind: bind$1,
+	  slice: slice$1,
+	  each: each$7,
+	  map: map,
+	  pluck: pluck$1,
+	  isList: isList$1,
+	  isFunction: isFunction$1,
+	  isObject: isObject$1,
+	  Global: Global$5
 	};
 
-	var staticAccessors$39 = { MaxPointDistanceFilter: { configurable: true },MaxDensifiedByFractionDistanceFilter: { configurable: true } };
-	DiscreteHausdorffDistance.prototype.getCoordinates = function getCoordinates () {
-	  return this._ptDist.getCoordinates()
-	};
-	DiscreteHausdorffDistance.prototype.setDensifyFraction = function setDensifyFraction (densifyFrac) {
-	  if (densifyFrac > 1.0 || densifyFrac <= 0.0) { throw new IllegalArgumentException('Fraction is not in range (0.0 - 1.0]') }
-	  this._densifyFrac = densifyFrac;
-	};
-	DiscreteHausdorffDistance.prototype.compute = function compute (g0, g1) {
-	  this.computeOrientedDistance(g0, g1, this._ptDist);
-	  this.computeOrientedDistance(g1, g0, this._ptDist);
-	};
-	DiscreteHausdorffDistance.prototype.distance = function distance () {
-	  this.compute(this._g0, this._g1);
-	  return this._ptDist.getDistance()
-	};
-	DiscreteHausdorffDistance.prototype.computeOrientedDistance = function computeOrientedDistance (discreteGeom, geom, ptDist) {
-	  var distFilter = new MaxPointDistanceFilter$1(geom);
-	  discreteGeom.apply(distFilter);
-	  ptDist.setMaximum(distFilter.getMaxPointDistance());
-	  if (this._densifyFrac > 0) {
-	    var fracFilter = new MaxDensifiedByFractionDistanceFilter(geom, this._densifyFrac);
-	    discreteGeom.apply(fracFilter);
-	    ptDist.setMaximum(fracFilter.getMaxPointDistance());
-	  }
-	};
-	DiscreteHausdorffDistance.prototype.orientedDistance = function orientedDistance () {
-	  this.computeOrientedDistance(this._g0, this._g1, this._ptDist);
-	  return this._ptDist.getDistance()
-	};
-	DiscreteHausdorffDistance.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	DiscreteHausdorffDistance.prototype.getClass = function getClass () {
-	  return DiscreteHausdorffDistance
-	};
-	DiscreteHausdorffDistance.distance = function distance () {
-	  if (arguments.length === 2) {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    var dist = new DiscreteHausdorffDistance(g0, g1);
-	    return dist.distance()
-	  } else if (arguments.length === 3) {
-	    var g0$1 = arguments[0];
-	    var g1$1 = arguments[1];
-	    var densifyFrac = arguments[2];
-	    var dist$1 = new DiscreteHausdorffDistance(g0$1, g1$1);
-	    dist$1.setDensifyFraction(densifyFrac);
-	    return dist$1.distance()
-	  }
-	};
-	staticAccessors$39.MaxPointDistanceFilter.get = function () { return MaxPointDistanceFilter$1 };
-	staticAccessors$39.MaxDensifiedByFractionDistanceFilter.get = function () { return MaxDensifiedByFractionDistanceFilter };
-
-	Object.defineProperties( DiscreteHausdorffDistance, staticAccessors$39 );
-
-	var MaxPointDistanceFilter$1 = function MaxPointDistanceFilter () {
-	  this._maxPtDist = new PointPairDistance$2();
-	  this._minPtDist = new PointPairDistance$2();
-	  this._euclideanDist = new DistanceToPoint();
-	  this._geom = null;
-	  var geom = arguments[0];
-	  this._geom = geom;
-	};
-	MaxPointDistanceFilter$1.prototype.filter = function filter (pt) {
-	  this._minPtDist.initialize();
-	  DistanceToPoint.computeDistance(this._geom, pt, this._minPtDist);
-	  this._maxPtDist.setMaximum(this._minPtDist);
-	};
-	MaxPointDistanceFilter$1.prototype.getMaxPointDistance = function getMaxPointDistance () {
-	  return this._maxPtDist
-	};
-	MaxPointDistanceFilter$1.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateFilter]
-	};
-	MaxPointDistanceFilter$1.prototype.getClass = function getClass () {
-	  return MaxPointDistanceFilter$1
-	};
+	function make_assign() {
+	  if (Object.assign) {
+	    return Object.assign;
+	  } else {
+	    return function shimAssign(obj, props1, props2, etc) {
+	      for (var i = 1; i < arguments.length; i++) {
+	        each$7(Object(arguments[i]), function (val, key) {
+	          obj[key] = val;
+	        });
+	      }
 
-	var MaxDensifiedByFractionDistanceFilter = function MaxDensifiedByFractionDistanceFilter () {
-	  this._maxPtDist = new PointPairDistance$2();
-	  this._minPtDist = new PointPairDistance$2();
-	  this._geom = null;
-	  this._numSubSegs = 0;
-	  var geom = arguments[0];
-	  var fraction = arguments[1];
-	  this._geom = geom;
-	  this._numSubSegs = Math.trunc(Math.round(1.0 / fraction));
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.filter = function filter (seq, index) {
-	    var this$1 = this;
-
-	  if (index === 0) { return null }
-	  var p0 = seq.getCoordinate(index - 1);
-	  var p1 = seq.getCoordinate(index);
-	  var delx = (p1.x - p0.x) / this._numSubSegs;
-	  var dely = (p1.y - p0.y) / this._numSubSegs;
-	  for (var i = 0; i < this._numSubSegs; i++) {
-	    var x = p0.x + i * delx;
-	    var y = p0.y + i * dely;
-	    var pt = new Coordinate(x, y);
-	    this$1._minPtDist.initialize();
-	    DistanceToPoint.computeDistance(this$1._geom, pt, this$1._minPtDist);
-	    this$1._maxPtDist.setMaximum(this$1._minPtDist);
+	      return obj;
+	    };
 	  }
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.isDone = function isDone () {
-	  return false
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.isGeometryChanged = function isGeometryChanged () {
-	  return false
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.getMaxPointDistance = function getMaxPointDistance () {
-	  return this._maxPtDist
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateSequenceFilter]
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.getClass = function getClass () {
-	  return MaxDensifiedByFractionDistanceFilter
-	};
+	}
 
-	var BufferDistanceValidator = function BufferDistanceValidator (input, bufDistance, result) {
-	  this._minValidDistance = null;
-	  this._maxValidDistance = null;
-	  this._minDistanceFound = null;
-	  this._maxDistanceFound = null;
-	  this._isValid = true;
-	  this._errMsg = null;
-	  this._errorLocation = null;
-	  this._errorIndicator = null;
-	  this._input = input || null;
-	  this._bufDistance = bufDistance || null;
-	  this._result = result || null;
-	};
+	function make_create() {
+	  if (Object.create) {
+	    return function create(obj, assignProps1, assignProps2, etc) {
+	      var assignArgsList = slice$1(arguments, 1);
+	      return assign.apply(this, [Object.create(obj)].concat(assignArgsList));
+	    };
+	  } else {
+	    var F = function F() {}; // eslint-disable-line no-inner-declarations
 
-	var staticAccessors$37 = { VERBOSE: { configurable: true },MAX_DISTANCE_DIFF_FRAC: { configurable: true } };
-	BufferDistanceValidator.prototype.checkMaximumDistance = function checkMaximumDistance (input, bufCurve, maxDist) {
-	  var haus = new DiscreteHausdorffDistance(bufCurve, input);
-	  haus.setDensifyFraction(0.25);
-	  this._maxDistanceFound = haus.orientedDistance();
-	  if (this._maxDistanceFound > maxDist) {
-	    this._isValid = false;
-	    var pts = haus.getCoordinates();
-	    this._errorLocation = pts[1];
-	    this._errorIndicator = input.getFactory().createLineString(pts);
-	    this._errMsg = 'Distance between buffer curve and input is too large (' + this._maxDistanceFound + ' at ' + WKTWriter.toLineString(pts[0], pts[1]) + ')';
+
+	    return function create(obj, assignProps1, assignProps2, etc) {
+	      var assignArgsList = slice$1(arguments, 1);
+	      F.prototype = obj;
+	      return assign.apply(this, [new F()].concat(assignArgsList));
+	    };
 	  }
-	};
-	BufferDistanceValidator.prototype.isValid = function isValid () {
-	  var posDistance = Math.abs(this._bufDistance);
-	  var distDelta = BufferDistanceValidator.MAX_DISTANCE_DIFF_FRAC * posDistance;
-	  this._minValidDistance = posDistance - distDelta;
-	  this._maxValidDistance = posDistance + distDelta;
-	  if (this._input.isEmpty() || this._result.isEmpty()) { return true }
-	  if (this._bufDistance > 0.0) {
-	    this.checkPositiveValid();
+	}
+
+	function make_trim() {
+	  if (String.prototype.trim) {
+	    return function trim(str) {
+	      return String.prototype.trim.call(str);
+	    };
 	  } else {
-	    this.checkNegativeValid();
-	  }
-	  if (BufferDistanceValidator.VERBOSE) {
-	    System.out.println('Min Dist= ' + this._minDistanceFound + '  err= ' + (1.0 - this._minDistanceFound / this._bufDistance) + '  Max Dist= ' + this._maxDistanceFound + '  err= ' + (this._maxDistanceFound / this._bufDistance - 1.0));
-	  }
-	  return this._isValid
-	};
-	BufferDistanceValidator.prototype.checkNegativeValid = function checkNegativeValid () {
-	  if (!(this._input instanceof Polygon || this._input instanceof MultiPolygon || this._input instanceof GeometryCollection)) {
-	    return null
-	  }
-	  var inputCurve = this.getPolygonLines(this._input);
-	  this.checkMinimumDistance(inputCurve, this._result, this._minValidDistance);
-	  if (!this._isValid) { return null }
-	  this.checkMaximumDistance(inputCurve, this._result, this._maxValidDistance);
-	};
-	BufferDistanceValidator.prototype.getErrorIndicator = function getErrorIndicator () {
-	  return this._errorIndicator
-	};
-	BufferDistanceValidator.prototype.checkMinimumDistance = function checkMinimumDistance (g1, g2, minDist) {
-	  var distOp = new DistanceOp(g1, g2, minDist);
-	  this._minDistanceFound = distOp.distance();
-	  if (this._minDistanceFound < minDist) {
-	    this._isValid = false;
-	    var pts = distOp.nearestPoints();
-	    this._errorLocation = distOp.nearestPoints()[1];
-	    this._errorIndicator = g1.getFactory().createLineString(pts);
-	    this._errMsg = 'Distance between buffer curve and input is too small (' + this._minDistanceFound + ' at ' + WKTWriter.toLineString(pts[0], pts[1]) + ' )';
+	    return function trim(str) {
+	      return str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');
+	    };
 	  }
-	};
-	BufferDistanceValidator.prototype.checkPositiveValid = function checkPositiveValid () {
-	  var bufCurve = this._result.getBoundary();
-	  this.checkMinimumDistance(this._input, bufCurve, this._minValidDistance);
-	  if (!this._isValid) { return null }
-	  this.checkMaximumDistance(this._input, bufCurve, this._maxValidDistance);
-	};
-	BufferDistanceValidator.prototype.getErrorLocation = function getErrorLocation () {
-	  return this._errorLocation
-	};
-	BufferDistanceValidator.prototype.getPolygonLines = function getPolygonLines (g) {
-	  var lines = new ArrayList();
-	  var lineExtracter = new LinearComponentExtracter(lines);
-	  var polys = PolygonExtracter.getPolygons(g);
-	  for (var i = polys.iterator(); i.hasNext();) {
-	    var poly = i.next();
-	    poly.apply(lineExtracter);
-	  }
-	  return g.getFactory().buildGeometry(lines)
-	};
-	BufferDistanceValidator.prototype.getErrorMessage = function getErrorMessage () {
-	  return this._errMsg
-	};
-	BufferDistanceValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferDistanceValidator.prototype.getClass = function getClass () {
-	  return BufferDistanceValidator
-	};
-	staticAccessors$37.VERBOSE.get = function () { return false };
-	staticAccessors$37.MAX_DISTANCE_DIFF_FRAC.get = function () { return 0.012 };
-
-	Object.defineProperties( BufferDistanceValidator, staticAccessors$37 );
-
-	var BufferResultValidator = function BufferResultValidator (input, distance, result) {
-	  this._isValid = true;
-	  this._errorMsg = null;
-	  this._errorLocation = null;
-	  this._errorIndicator = null;
-	  this._input = input || null;
-	  this._distance = distance || null;
-	  this._result = result || null;
-	};
+	}
 
-	var staticAccessors$40 = { VERBOSE: { configurable: true },MAX_ENV_DIFF_FRAC: { configurable: true } };
-	BufferResultValidator.prototype.isValid = function isValid () {
-	  this.checkPolygonal();
-	  if (!this._isValid) { return this._isValid }
-	  this.checkExpectedEmpty();
-	  if (!this._isValid) { return this._isValid }
-	  this.checkEnvelope();
-	  if (!this._isValid) { return this._isValid }
-	  this.checkArea();
-	  if (!this._isValid) { return this._isValid }
-	  this.checkDistance();
-	  return this._isValid
-	};
-	BufferResultValidator.prototype.checkEnvelope = function checkEnvelope () {
-	  if (this._distance < 0.0) { return null }
-	  var padding = this._distance * BufferResultValidator.MAX_ENV_DIFF_FRAC;
-	  if (padding === 0.0) { padding = 0.001; }
-	  var expectedEnv = new Envelope(this._input.getEnvelopeInternal());
-	  expectedEnv.expandBy(this._distance);
-	  var bufEnv = new Envelope(this._result.getEnvelopeInternal());
-	  bufEnv.expandBy(padding);
-	  if (!bufEnv.contains(expectedEnv)) {
-	    this._isValid = false;
-	    this._errorMsg = 'Buffer envelope is incorrect';
-	    this._errorIndicator = this._input.getFactory().toGeometry(bufEnv);
-	  }
-	  this.report('Envelope');
-	};
-	BufferResultValidator.prototype.checkDistance = function checkDistance () {
-	  var distValid = new BufferDistanceValidator(this._input, this._distance, this._result);
-	  if (!distValid.isValid()) {
-	    this._isValid = false;
-	    this._errorMsg = distValid.getErrorMessage();
-	    this._errorLocation = distValid.getErrorLocation();
-	    this._errorIndicator = distValid.getErrorIndicator();
-	  }
-	  this.report('Distance');
-	};
-	BufferResultValidator.prototype.checkArea = function checkArea () {
-	  var inputArea = this._input.getArea();
-	  var resultArea = this._result.getArea();
-	  if (this._distance > 0.0 && inputArea > resultArea) {
-	    this._isValid = false;
-	    this._errorMsg = 'Area of positive buffer is smaller than input';
-	    this._errorIndicator = this._result;
-	  }
-	  if (this._distance < 0.0 && inputArea < resultArea) {
-	    this._isValid = false;
-	    this._errorMsg = 'Area of negative buffer is larger than input';
-	    this._errorIndicator = this._result;
-	  }
-	  this.report('Area');
-	};
-	BufferResultValidator.prototype.checkPolygonal = function checkPolygonal () {
-	  if (!(this._result instanceof Polygon || this._result instanceof MultiPolygon)) { this._isValid = false; }
-	  this._errorMsg = 'Result is not polygonal';
-	  this._errorIndicator = this._result;
-	  this.report('Polygonal');
-	};
-	BufferResultValidator.prototype.getErrorIndicator = function getErrorIndicator () {
-	  return this._errorIndicator
-	};
-	BufferResultValidator.prototype.getErrorLocation = function getErrorLocation () {
-	  return this._errorLocation
-	};
-	BufferResultValidator.prototype.checkExpectedEmpty = function checkExpectedEmpty () {
-	  if (this._input.getDimension() >= 2) { return null }
-	  if (this._distance > 0.0) { return null }
-	  if (!this._result.isEmpty()) {
-	    this._isValid = false;
-	    this._errorMsg = 'Result is non-empty';
-	    this._errorIndicator = this._result;
-	  }
-	  this.report('ExpectedEmpty');
-	};
-	BufferResultValidator.prototype.report = function report (checkName) {
-	  if (!BufferResultValidator.VERBOSE) { return null }
-	  System.out.println('Check ' + checkName + ': ' + (this._isValid ? 'passed' : 'FAILED'));
-	};
-	BufferResultValidator.prototype.getErrorMessage = function getErrorMessage () {
-	  return this._errorMsg
-	};
-	BufferResultValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferResultValidator.prototype.getClass = function getClass () {
-	  return BufferResultValidator
-	};
-	BufferResultValidator.isValidMsg = function isValidMsg (g, distance, result) {
-	  var validator = new BufferResultValidator(g, distance, result);
-	  if (!validator.isValid()) { return validator.getErrorMessage() }
-	  return null
-	};
-	BufferResultValidator.isValid = function isValid (g, distance, result) {
-	  var validator = new BufferResultValidator(g, distance, result);
-	  if (validator.isValid()) { return true }
-	  return false
-	};
-	staticAccessors$40.VERBOSE.get = function () { return false };
-	staticAccessors$40.MAX_ENV_DIFF_FRAC.get = function () { return 0.012 };
+	function bind$1(obj, fn) {
+	  return function () {
+	    return fn.apply(obj, Array.prototype.slice.call(arguments, 0));
+	  };
+	}
 
-	Object.defineProperties( BufferResultValidator, staticAccessors$40 );
+	function slice$1(arr, index) {
+	  return Array.prototype.slice.call(arr, index || 0);
+	}
 
-	// operation.buffer
+	function each$7(obj, fn) {
+	  pluck$1(obj, function (val, key) {
+	    fn(val, key);
+	    return false;
+	  });
+	}
 
-	var BasicSegmentString = function BasicSegmentString () {
-	  this._pts = null;
-	  this._data = null;
-	  var pts = arguments[0];
-	  var data = arguments[1];
-	  this._pts = pts;
-	  this._data = data;
-	};
-	BasicSegmentString.prototype.getCoordinates = function getCoordinates () {
-	  return this._pts
-	};
-	BasicSegmentString.prototype.size = function size () {
-	  return this._pts.length
-	};
-	BasicSegmentString.prototype.getCoordinate = function getCoordinate (i) {
-	  return this._pts[i]
-	};
-	BasicSegmentString.prototype.isClosed = function isClosed () {
-	  return this._pts[0].equals(this._pts[this._pts.length - 1])
-	};
-	BasicSegmentString.prototype.getSegmentOctant = function getSegmentOctant (index) {
-	  if (index === this._pts.length - 1) { return -1 }
-	  return Octant.octant(this.getCoordinate(index), this.getCoordinate(index + 1))
-	};
-	BasicSegmentString.prototype.setData = function setData (data) {
-	  this._data = data;
-	};
-	BasicSegmentString.prototype.getData = function getData () {
-	  return this._data
-	};
-	BasicSegmentString.prototype.toString = function toString () {
-	  return WKTWriter.toLineString(new CoordinateArraySequence(this._pts))
-	};
-	BasicSegmentString.prototype.interfaces_ = function interfaces_ () {
-	  return [SegmentString]
-	};
-	BasicSegmentString.prototype.getClass = function getClass () {
-	  return BasicSegmentString
-	};
+	function map(obj, fn) {
+	  var res = isList$1(obj) ? [] : {};
+	  pluck$1(obj, function (v, k) {
+	    res[k] = fn(v, k);
+	    return false;
+	  });
+	  return res;
+	}
 
-	var InteriorIntersectionFinder = function InteriorIntersectionFinder () {
-	  this._findAllIntersections = false;
-	  this._isCheckEndSegmentsOnly = false;
-	  this._li = null;
-	  this._interiorIntersection = null;
-	  this._intSegments = null;
-	  this._intersections = new ArrayList();
-	  this._intersectionCount = 0;
-	  this._keepIntersections = true;
-	  var li = arguments[0];
-	  this._li = li;
-	  this._interiorIntersection = null;
-	};
-	InteriorIntersectionFinder.prototype.getInteriorIntersection = function getInteriorIntersection () {
-	  return this._interiorIntersection
-	};
-	InteriorIntersectionFinder.prototype.setCheckEndSegmentsOnly = function setCheckEndSegmentsOnly (isCheckEndSegmentsOnly) {
-	  this._isCheckEndSegmentsOnly = isCheckEndSegmentsOnly;
-	};
-	InteriorIntersectionFinder.prototype.getIntersectionSegments = function getIntersectionSegments () {
-	  return this._intSegments
-	};
-	InteriorIntersectionFinder.prototype.count = function count () {
-	  return this._intersectionCount
-	};
-	InteriorIntersectionFinder.prototype.getIntersections = function getIntersections () {
-	  return this._intersections
-	};
-	InteriorIntersectionFinder.prototype.setFindAllIntersections = function setFindAllIntersections (findAllIntersections) {
-	  this._findAllIntersections = findAllIntersections;
-	};
-	InteriorIntersectionFinder.prototype.setKeepIntersections = function setKeepIntersections (keepIntersections) {
-	  this._keepIntersections = keepIntersections;
-	};
-	InteriorIntersectionFinder.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {
-	  if (!this._findAllIntersections && this.hasIntersection()) { return null }
-	  if (e0 === e1 && segIndex0 === segIndex1) { return null }
-	  if (this._isCheckEndSegmentsOnly) {
-	    var isEndSegPresent = this.isEndSegment(e0, segIndex0) || this.isEndSegment(e1, segIndex1);
-	    if (!isEndSegPresent) { return null }
-	  }
-	  var p00 = e0.getCoordinates()[segIndex0];
-	  var p01 = e0.getCoordinates()[segIndex0 + 1];
-	  var p10 = e1.getCoordinates()[segIndex1];
-	  var p11 = e1.getCoordinates()[segIndex1 + 1];
-	  this._li.computeIntersection(p00, p01, p10, p11);
-	  if (this._li.hasIntersection()) {
-	    if (this._li.isInteriorIntersection()) {
-	      this._intSegments = new Array(4).fill(null);
-	      this._intSegments[0] = p00;
-	      this._intSegments[1] = p01;
-	      this._intSegments[2] = p10;
-	      this._intSegments[3] = p11;
-	      this._interiorIntersection = this._li.getIntersection(0);
-	      if (this._keepIntersections) { this._intersections.add(this._interiorIntersection); }
-	      this._intersectionCount++;
+	function pluck$1(obj, fn) {
+	  if (isList$1(obj)) {
+	    for (var i = 0; i < obj.length; i++) {
+	      if (fn(obj[i], i)) {
+	        return obj[i];
+	      }
+	    }
+	  } else {
+	    for (var key in obj) {
+	      if (obj.hasOwnProperty(key)) {
+	        if (fn(obj[key], key)) {
+	          return obj[key];
+	        }
+	      }
 	    }
 	  }
-	};
-	InteriorIntersectionFinder.prototype.isEndSegment = function isEndSegment (segStr, index) {
-	  if (index === 0) { return true }
-	  if (index >= segStr.size() - 2) { return true }
-	  return false
-	};
-	InteriorIntersectionFinder.prototype.hasIntersection = function hasIntersection () {
-	  return this._interiorIntersection !== null
-	};
-	InteriorIntersectionFinder.prototype.isDone = function isDone () {
-	  if (this._findAllIntersections) { return false }
-	  return this._interiorIntersection !== null
-	};
-	InteriorIntersectionFinder.prototype.interfaces_ = function interfaces_ () {
-	  return [SegmentIntersector]
-	};
-	InteriorIntersectionFinder.prototype.getClass = function getClass () {
-	  return InteriorIntersectionFinder
-	};
-	InteriorIntersectionFinder.createAllIntersectionsFinder = function createAllIntersectionsFinder (li) {
-	  var finder = new InteriorIntersectionFinder(li);
-	  finder.setFindAllIntersections(true);
-	  return finder
-	};
-	InteriorIntersectionFinder.createAnyIntersectionFinder = function createAnyIntersectionFinder (li) {
-	  return new InteriorIntersectionFinder(li)
-	};
-	InteriorIntersectionFinder.createIntersectionCounter = function createIntersectionCounter (li) {
-	  var finder = new InteriorIntersectionFinder(li);
-	  finder.setFindAllIntersections(true);
-	  finder.setKeepIntersections(false);
-	  return finder
-	};
+	}
 
-	var FastNodingValidator = function FastNodingValidator () {
-	  this._li = new RobustLineIntersector();
-	  this._segStrings = null;
-	  this._findAllIntersections = false;
-	  this._segInt = null;
-	  this._isValid = true;
-	  var segStrings = arguments[0];
-	  this._segStrings = segStrings;
-	};
-	FastNodingValidator.prototype.execute = function execute () {
-	  if (this._segInt !== null) { return null }
-	  this.checkInteriorIntersections();
-	};
-	FastNodingValidator.prototype.getIntersections = function getIntersections () {
-	  return this._segInt.getIntersections()
-	};
-	FastNodingValidator.prototype.isValid = function isValid () {
-	  this.execute();
-	  return this._isValid
-	};
-	FastNodingValidator.prototype.setFindAllIntersections = function setFindAllIntersections (findAllIntersections) {
-	  this._findAllIntersections = findAllIntersections;
-	};
-	FastNodingValidator.prototype.checkInteriorIntersections = function checkInteriorIntersections () {
-	  this._isValid = true;
-	  this._segInt = new InteriorIntersectionFinder(this._li);
-	  this._segInt.setFindAllIntersections(this._findAllIntersections);
-	  var noder = new MCIndexNoder();
-	  noder.setSegmentIntersector(this._segInt);
-	  noder.computeNodes(this._segStrings);
-	  if (this._segInt.hasIntersection()) {
-	    this._isValid = false;
-	    return null
-	  }
-	};
-	FastNodingValidator.prototype.checkValid = function checkValid () {
-	  this.execute();
-	  if (!this._isValid) { throw new TopologyException(this.getErrorMessage(), this._segInt.getInteriorIntersection()) }
-	};
-	FastNodingValidator.prototype.getErrorMessage = function getErrorMessage () {
-	  if (this._isValid) { return 'no intersections found' }
-	  var intSegs = this._segInt.getIntersectionSegments();
-	  return 'found non-noded intersection between ' + WKTWriter.toLineString(intSegs[0], intSegs[1]) + ' and ' + WKTWriter.toLineString(intSegs[2], intSegs[3])
-	};
-	FastNodingValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	FastNodingValidator.prototype.getClass = function getClass () {
-	  return FastNodingValidator
-	};
-	FastNodingValidator.computeIntersections = function computeIntersections (segStrings) {
-	  var nv = new FastNodingValidator(segStrings);
-	  nv.setFindAllIntersections(true);
-	  nv.isValid();
-	  return nv.getIntersections()
-	};
+	function isList$1(val) {
+	  return val != null && typeof val != 'function' && typeof val.length == 'number';
+	}
 
-	var EdgeNodingValidator = function EdgeNodingValidator () {
-	  this._nv = null;
-	  var edges = arguments[0];
-	  this._nv = new FastNodingValidator(EdgeNodingValidator.toSegmentStrings(edges));
-	};
-	EdgeNodingValidator.prototype.checkValid = function checkValid () {
-	  this._nv.checkValid();
-	};
-	EdgeNodingValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeNodingValidator.prototype.getClass = function getClass () {
-	  return EdgeNodingValidator
-	};
-	EdgeNodingValidator.toSegmentStrings = function toSegmentStrings (edges) {
-	  var segStrings = new ArrayList();
-	  for (var i = edges.iterator(); i.hasNext();) {
-	    var e = i.next();
-	    segStrings.add(new BasicSegmentString(e.getCoordinates(), e));
-	  }
-	  return segStrings
-	};
-	EdgeNodingValidator.checkValid = function checkValid (edges) {
-	  var validator = new EdgeNodingValidator(edges);
-	  validator.checkValid();
-	};
+	function isFunction$1(val) {
+	  return val && {}.toString.call(val) === '[object Function]';
+	}
+
+	function isObject$1(val) {
+	  return val && {}.toString.call(val) === '[object Object]';
+	}
 
-	var GeometryCollectionMapper = function GeometryCollectionMapper (mapOp) {
-	  this._mapOp = mapOp;
+	var util$5 = util$6;
+	var slice = util$5.slice;
+	var pluck = util$5.pluck;
+	var each$6 = util$5.each;
+	var bind = util$5.bind;
+	var create = util$5.create;
+	var isList = util$5.isList;
+	var isFunction = util$5.isFunction;
+	var isObject = util$5.isObject;
+	var storeEngine = {
+	  createStore: _createStore
 	};
-	GeometryCollectionMapper.prototype.map = function map (gc) {
-	    var this$1 = this;
+	var storeAPI = {
+	  version: '2.0.12',
+	  enabled: false,
+	  // get returns the value of the given key. If that value
+	  // is undefined, it returns optionalDefaultValue instead.
+	  get: function get(key, optionalDefaultValue) {
+	    var data = this.storage.read(this._namespacePrefix + key);
+	    return this._deserialize(data, optionalDefaultValue);
+	  },
+	  // set will store the given value at key and returns value.
+	  // Calling set with value === undefined is equivalent to calling remove.
+	  set: function set(key, value) {
+	    if (value === undefined) {
+	      return this.remove(key);
+	    }
 
-	  var mapped = new ArrayList();
-	  for (var i = 0; i < gc.getNumGeometries(); i++) {
-	    var g = this$1._mapOp.map(gc.getGeometryN(i));
-	    if (!g.isEmpty()) { mapped.add(g); }
+	    this.storage.write(this._namespacePrefix + key, this._serialize(value));
+	    return value;
+	  },
+	  // remove deletes the key and value stored at the given key.
+	  remove: function remove(key) {
+	    this.storage.remove(this._namespacePrefix + key);
+	  },
+	  // each will call the given callback once for each key-value pair
+	  // in this store.
+	  each: function each(callback) {
+	    var self = this;
+	    this.storage.each(function (val, namespacedKey) {
+	      callback.call(self, self._deserialize(val), (namespacedKey || '').replace(self._namespaceRegexp, ''));
+	    });
+	  },
+	  // clearAll will remove all the stored key-value pairs in this store.
+	  clearAll: function clearAll() {
+	    this.storage.clearAll();
+	  },
+	  // additional functionality that can't live in plugins
+	  // ---------------------------------------------------
+	  // hasNamespace returns true if this store instance has the given namespace.
+	  hasNamespace: function hasNamespace(namespace) {
+	    return this._namespacePrefix == '__storejs_' + namespace + '_';
+	  },
+	  // createStore creates a store.js instance with the first
+	  // functioning storage in the list of storage candidates,
+	  // and applies the the given mixins to the instance.
+	  createStore: function createStore() {
+	    return _createStore.apply(this, arguments);
+	  },
+	  addPlugin: function addPlugin(plugin) {
+	    this._addPlugin(plugin);
+	  },
+	  namespace: function namespace(_namespace) {
+	    return _createStore(this.storage, this.plugins, _namespace);
 	  }
-	  return gc.getFactory().createGeometryCollection(GeometryFactory.toGeometryArray(mapped))
-	};
-	GeometryCollectionMapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryCollectionMapper.prototype.getClass = function getClass () {
-	  return GeometryCollectionMapper
-	};
-	GeometryCollectionMapper.map = function map (gc, op) {
-	  var mapper = new GeometryCollectionMapper(op);
-	  return mapper.map(gc)
 	};
 
-	var LineBuilder = function LineBuilder () {
-	  this._op = null;
-	  this._geometryFactory = null;
-	  this._ptLocator = null;
-	  this._lineEdgesList = new ArrayList();
-	  this._resultLineList = new ArrayList();
-	  var op = arguments[0];
-	  var geometryFactory = arguments[1];
-	  var ptLocator = arguments[2];
-	  this._op = op;
-	  this._geometryFactory = geometryFactory;
-	  this._ptLocator = ptLocator;
-	};
-	LineBuilder.prototype.collectLines = function collectLines (opCode) {
-	    var this$1 = this;
+	function _warn() {
+	  var _console = typeof console == 'undefined' ? null : console;
 
-	  for (var it = this._op.getGraph().getEdgeEnds().iterator(); it.hasNext();) {
-	    var de = it.next();
-	    this$1.collectLineEdge(de, opCode, this$1._lineEdgesList);
-	    this$1.collectBoundaryTouchEdge(de, opCode, this$1._lineEdgesList);
-	  }
-	};
-	LineBuilder.prototype.labelIsolatedLine = function labelIsolatedLine (e, targetIndex) {
-	  var loc = this._ptLocator.locate(e.getCoordinate(), this._op.getArgGeometry(targetIndex));
-	  e.getLabel().setLocation(targetIndex, loc);
-	};
-	LineBuilder.prototype.build = function build (opCode) {
-	  this.findCoveredLineEdges();
-	  this.collectLines(opCode);
-	  this.buildLines(opCode);
-	  return this._resultLineList
-	};
-	LineBuilder.prototype.collectLineEdge = function collectLineEdge (de, opCode, edges) {
-	  var label = de.getLabel();
-	  var e = de.getEdge();
-	  if (de.isLineEdge()) {
-	    if (!de.isVisited() && OverlayOp.isResultOfOp(label, opCode) && !e.isCovered()) {
-	      edges.add(e);
-	      de.setVisitedEdge(true);
-	    }
+	  if (!_console) {
+	    return;
 	  }
-	};
-	LineBuilder.prototype.findCoveredLineEdges = function findCoveredLineEdges () {
-	    var this$1 = this;
 
-	  for (var nodeit = this._op.getGraph().getNodes().iterator(); nodeit.hasNext();) {
-	    var node = nodeit.next();
-	    node.getEdges().findCoveredLineEdges();
-	  }
-	  for (var it = this._op.getGraph().getEdgeEnds().iterator(); it.hasNext();) {
-	    var de = it.next();
-	    var e = de.getEdge();
-	    if (de.isLineEdge() && !e.isCoveredSet()) {
-	      var isCovered = this$1._op.isCoveredByA(de.getCoordinate());
-	      e.setCovered(isCovered);
-	    }
-	  }
-	};
-	LineBuilder.prototype.labelIsolatedLines = function labelIsolatedLines (edgesList) {
-	    var this$1 = this;
+	  var fn = _console.warn ? _console.warn : _console.log;
+	  fn.apply(_console, arguments);
+	}
 
-	  for (var it = edgesList.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    var label = e.getLabel();
-	    if (e.isIsolated()) {
-	      if (label.isNull(0)) { this$1.labelIsolatedLine(e, 0); } else { this$1.labelIsolatedLine(e, 1); }
-	    }
+	function _createStore(storages, plugins, namespace) {
+	  if (!namespace) {
+	    namespace = '';
 	  }
-	};
-	LineBuilder.prototype.buildLines = function buildLines (opCode) {
-	    var this$1 = this;
 
-	  for (var it = this._lineEdgesList.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    // const label = e.getLabel()
-	    var line = this$1._geometryFactory.createLineString(e.getCoordinates());
-	    this$1._resultLineList.add(line);
-	    e.setInResult(true);
+	  if (storages && !isList(storages)) {
+	    storages = [storages];
 	  }
-	};
-	LineBuilder.prototype.collectBoundaryTouchEdge = function collectBoundaryTouchEdge (de, opCode, edges) {
-	  var label = de.getLabel();
-	  if (de.isLineEdge()) { return null }
-	  if (de.isVisited()) { return null }
-	  if (de.isInteriorAreaEdge()) { return null }
-	  if (de.getEdge().isInResult()) { return null }
-	  Assert.isTrue(!(de.isInResult() || de.getSym().isInResult()) || !de.getEdge().isInResult());
-	  if (OverlayOp.isResultOfOp(label, opCode) && opCode === OverlayOp.INTERSECTION) {
-	    edges.add(de.getEdge());
-	    de.setVisitedEdge(true);
+
+	  if (plugins && !isList(plugins)) {
+	    plugins = [plugins];
 	  }
-	};
-	LineBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	LineBuilder.prototype.getClass = function getClass () {
-	  return LineBuilder
-	};
 
-	var PointBuilder = function PointBuilder () {
-	  this._op = null;
-	  this._geometryFactory = null;
-	  this._resultPointList = new ArrayList();
-	  var op = arguments[0];
-	  var geometryFactory = arguments[1];
-	  // const ptLocator = arguments[2]
-	  this._op = op;
-	  this._geometryFactory = geometryFactory;
-	};
-	PointBuilder.prototype.filterCoveredNodeToPoint = function filterCoveredNodeToPoint (n) {
-	  var coord = n.getCoordinate();
-	  if (!this._op.isCoveredByLA(coord)) {
-	    var pt = this._geometryFactory.createPoint(coord);
-	    this._resultPointList.add(pt);
+	  var namespacePrefix = namespace ? '__storejs_' + namespace + '_' : '';
+	  var namespaceRegexp = namespace ? new RegExp('^' + namespacePrefix) : null;
+	  var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
+
+	  if (!legalNamespaces.test(namespace)) {
+	    throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes');
 	  }
-	};
-	PointBuilder.prototype.extractNonCoveredResultNodes = function extractNonCoveredResultNodes (opCode) {
-	    var this$1 = this;
 
-	  for (var nodeit = this._op.getGraph().getNodes().iterator(); nodeit.hasNext();) {
-	    var n = nodeit.next();
-	    if (n.isInResult()) { continue }
-	    if (n.isIncidentEdgeInResult()) { continue }
-	    if (n.getEdges().getDegree() === 0 || opCode === OverlayOp.INTERSECTION) {
-	      var label = n.getLabel();
-	      if (OverlayOp.isResultOfOp(label, opCode)) {
-	        this$1.filterCoveredNodeToPoint(n);
+	  var _privateStoreProps = {
+	    _namespacePrefix: namespacePrefix,
+	    _namespaceRegexp: namespaceRegexp,
+	    _testStorage: function _testStorage(storage) {
+	      try {
+	        var testStr = '__storejs__test__';
+	        storage.write(testStr, testStr);
+	        var ok = storage.read(testStr) === testStr;
+	        storage.remove(testStr);
+	        return ok;
+	      } catch (e) {
+	        return false;
 	      }
-	    }
-	  }
-	};
-	PointBuilder.prototype.build = function build (opCode) {
-	  this.extractNonCoveredResultNodes(opCode);
-	  return this._resultPointList
-	};
-	PointBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointBuilder.prototype.getClass = function getClass () {
-	  return PointBuilder
-	};
+	    },
+	    _assignPluginFnProp: function _assignPluginFnProp(pluginFnProp, propName) {
+	      var oldFn = this[propName];
 
-	var GeometryTransformer = function GeometryTransformer () {
-	  this._inputGeom = null;
-	  this._factory = null;
-	  this._pruneEmptyGeometry = true;
-	  this._preserveGeometryCollectionType = true;
-	  this._preserveCollections = false;
-	  this._preserveType = false;
-	};
-	GeometryTransformer.prototype.transformPoint = function transformPoint (geom, parent) {
-	  return this._factory.createPoint(this.transformCoordinates(geom.getCoordinateSequence(), geom))
-	};
-	GeometryTransformer.prototype.transformPolygon = function transformPolygon (geom, parent) {
-	    var this$1 = this;
-
-	  var isAllValidLinearRings = true;
-	  var shell = this.transformLinearRing(geom.getExteriorRing(), geom);
-	  if (shell === null || !(shell instanceof LinearRing) || shell.isEmpty()) { isAllValidLinearRings = false; }
-	  var holes = new ArrayList();
-	  for (var i = 0; i < geom.getNumInteriorRing(); i++) {
-	    var hole = this$1.transformLinearRing(geom.getInteriorRingN(i), geom);
-	    if (hole === null || hole.isEmpty()) {
-	      continue
-	    }
-	    if (!(hole instanceof LinearRing)) { isAllValidLinearRings = false; }
-	    holes.add(hole);
-	  }
-	  if (isAllValidLinearRings) { return this._factory.createPolygon(shell, holes.toArray([])); } else {
-	    var components = new ArrayList();
-	    if (shell !== null) { components.add(shell); }
-	    components.addAll(holes);
-	    return this._factory.buildGeometry(components)
-	  }
-	};
-	GeometryTransformer.prototype.createCoordinateSequence = function createCoordinateSequence (coords) {
-	  return this._factory.getCoordinateSequenceFactory().create(coords)
-	};
-	GeometryTransformer.prototype.getInputGeometry = function getInputGeometry () {
-	  return this._inputGeom
-	};
-	GeometryTransformer.prototype.transformMultiLineString = function transformMultiLineString (geom, parent) {
-	    var this$1 = this;
+	      this[propName] = function pluginFn() {
+	        var args = slice(arguments, 0);
+	        var self = this; // super_fn calls the old function which was overwritten by
+	        // this mixin.
 
-	  var transGeomList = new ArrayList();
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var transformGeom = this$1.transformLineString(geom.getGeometryN(i), geom);
-	    if (transformGeom === null) { continue }
-	    if (transformGeom.isEmpty()) { continue }
-	    transGeomList.add(transformGeom);
-	  }
-	  return this._factory.buildGeometry(transGeomList)
-	};
-	GeometryTransformer.prototype.transformCoordinates = function transformCoordinates (coords, parent) {
-	  return this.copy(coords)
-	};
-	GeometryTransformer.prototype.transformLineString = function transformLineString (geom, parent) {
-	  return this._factory.createLineString(this.transformCoordinates(geom.getCoordinateSequence(), geom))
-	};
-	GeometryTransformer.prototype.transformMultiPoint = function transformMultiPoint (geom, parent) {
-	    var this$1 = this;
+	        function super_fn() {
+	          if (!oldFn) {
+	            return;
+	          }
 
-	  var transGeomList = new ArrayList();
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var transformGeom = this$1.transformPoint(geom.getGeometryN(i), geom);
-	    if (transformGeom === null) { continue }
-	    if (transformGeom.isEmpty()) { continue }
-	    transGeomList.add(transformGeom);
-	  }
-	  return this._factory.buildGeometry(transGeomList)
-	};
-	GeometryTransformer.prototype.transformMultiPolygon = function transformMultiPolygon (geom, parent) {
-	    var this$1 = this;
+	          each$6(arguments, function (arg, i) {
+	            args[i] = arg;
+	          });
+	          return oldFn.apply(self, args);
+	        } // Give mixing function access to super_fn by prefixing all mixin function
+	        // arguments with super_fn.
 
-	  var transGeomList = new ArrayList();
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var transformGeom = this$1.transformPolygon(geom.getGeometryN(i), geom);
-	    if (transformGeom === null) { continue }
-	    if (transformGeom.isEmpty()) { continue }
-	    transGeomList.add(transformGeom);
-	  }
-	  return this._factory.buildGeometry(transGeomList)
-	};
-	GeometryTransformer.prototype.copy = function copy (seq) {
-	  return seq.copy()
-	};
-	GeometryTransformer.prototype.transformGeometryCollection = function transformGeometryCollection (geom, parent) {
-	    var this$1 = this;
-
-	  var transGeomList = new ArrayList();
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var transformGeom = this$1.transform(geom.getGeometryN(i));
-	    if (transformGeom === null) { continue }
-	    if (this$1._pruneEmptyGeometry && transformGeom.isEmpty()) { continue }
-	    transGeomList.add(transformGeom);
-	  }
-	  if (this._preserveGeometryCollectionType) { return this._factory.createGeometryCollection(GeometryFactory.toGeometryArray(transGeomList)) }
-	  return this._factory.buildGeometry(transGeomList)
-	};
-	GeometryTransformer.prototype.transform = function transform (inputGeom) {
-	  this._inputGeom = inputGeom;
-	  this._factory = inputGeom.getFactory();
-	  if (inputGeom instanceof Point$1) { return this.transformPoint(inputGeom, null) }
-	  if (inputGeom instanceof MultiPoint) { return this.transformMultiPoint(inputGeom, null) }
-	  if (inputGeom instanceof LinearRing) { return this.transformLinearRing(inputGeom, null) }
-	  if (inputGeom instanceof LineString) { return this.transformLineString(inputGeom, null) }
-	  if (inputGeom instanceof MultiLineString) { return this.transformMultiLineString(inputGeom, null) }
-	  if (inputGeom instanceof Polygon) { return this.transformPolygon(inputGeom, null) }
-	  if (inputGeom instanceof MultiPolygon) { return this.transformMultiPolygon(inputGeom, null) }
-	  if (inputGeom instanceof GeometryCollection) { return this.transformGeometryCollection(inputGeom, null) }
-	  throw new IllegalArgumentException('Unknown Geometry subtype: ' + inputGeom.getClass().getName())
-	};
-	GeometryTransformer.prototype.transformLinearRing = function transformLinearRing (geom, parent) {
-	  var seq = this.transformCoordinates(geom.getCoordinateSequence(), geom);
-	  if (seq === null) { return this._factory.createLinearRing(null) }
-	  var seqSize = seq.size();
-	  if (seqSize > 0 && seqSize < 4 && !this._preserveType) { return this._factory.createLineString(seq) }
-	  return this._factory.createLinearRing(seq)
-	};
-	GeometryTransformer.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryTransformer.prototype.getClass = function getClass () {
-	  return GeometryTransformer
-	};
 
-	var LineStringSnapper = function LineStringSnapper () {
-	  this._snapTolerance = 0.0;
-	  this._srcPts = null;
-	  this._seg = new LineSegment();
-	  this._allowSnappingToSourceVertices = false;
-	  this._isClosed = false;
-	  if (arguments[0] instanceof LineString && typeof arguments[1] === 'number') {
-	    var srcLine = arguments[0];
-	    var snapTolerance = arguments[1];
-	    LineStringSnapper.call(this, srcLine.getCoordinates(), snapTolerance);
-	  } else if (arguments[0] instanceof Array && typeof arguments[1] === 'number') {
-	    var srcPts = arguments[0];
-	    var snapTolerance$1 = arguments[1];
-	    this._srcPts = srcPts;
-	    this._isClosed = LineStringSnapper.isClosed(srcPts);
-	    this._snapTolerance = snapTolerance$1;
-	  }
-	};
-	LineStringSnapper.prototype.snapVertices = function snapVertices (srcCoords, snapPts) {
-	    var this$1 = this;
+	        var newFnArgs = [super_fn].concat(args);
+	        return pluginFnProp.apply(self, newFnArgs);
+	      };
+	    },
+	    _serialize: function _serialize(obj) {
+	      return JSON.stringify(obj);
+	    },
+	    _deserialize: function _deserialize(strVal, defaultVal) {
+	      if (!strVal) {
+	        return defaultVal;
+	      } // It is possible that a raw string value has been previously stored
+	      // in a storage without using store.js, meaning it will be a raw
+	      // string value instead of a JSON serialized string. By defaulting
+	      // to the raw string value in case of a JSON parse error, we allow
+	      // for past stored values to be forwards-compatible with store.js
+
+
+	      var val = '';
+
+	      try {
+	        val = JSON.parse(strVal);
+	      } catch (e) {
+	        val = strVal;
+	      }
+
+	      return val !== undefined ? val : defaultVal;
+	    },
+	    _addStorage: function _addStorage(storage) {
+	      if (this.enabled) {
+	        return;
+	      }
+
+	      if (this._testStorage(storage)) {
+	        this.storage = storage;
+	        this.enabled = true;
+	      }
+	    },
+	    _addPlugin: function _addPlugin(plugin) {
+	      var self = this; // If the plugin is an array, then add all plugins in the array.
+	      // This allows for a plugin to depend on other plugins.
+
+	      if (isList(plugin)) {
+	        each$6(plugin, function (plugin) {
+	          self._addPlugin(plugin);
+	        });
+	        return;
+	      } // Keep track of all plugins we've seen so far, so that we
+	      // don't add any of them twice.
+
+
+	      var seenPlugin = pluck(this.plugins, function (seenPlugin) {
+	        return plugin === seenPlugin;
+	      });
+
+	      if (seenPlugin) {
+	        return;
+	      }
+
+	      this.plugins.push(plugin); // Check that the plugin is properly formed
 
-	  var end = this._isClosed ? srcCoords.size() - 1 : srcCoords.size();
-	  for (var i = 0; i < end; i++) {
-	    var srcPt = srcCoords.get(i);
-	    var snapVert = this$1.findSnapForVertex(srcPt, snapPts);
-	    if (snapVert !== null) {
-	      srcCoords.set(i, new Coordinate(snapVert));
-	      if (i === 0 && this$1._isClosed) { srcCoords.set(srcCoords.size() - 1, new Coordinate(snapVert)); }
-	    }
-	  }
-	};
-	LineStringSnapper.prototype.findSnapForVertex = function findSnapForVertex (pt, snapPts) {
-	    var this$1 = this;
+	      if (!isFunction(plugin)) {
+	        throw new Error('Plugins must be function values that return objects');
+	      }
 
-	  for (var i = 0; i < snapPts.length; i++) {
-	    if (pt.equals2D(snapPts[i])) { return null }
-	    if (pt.distance(snapPts[i]) < this$1._snapTolerance) { return snapPts[i] }
-	  }
-	  return null
-	};
-	LineStringSnapper.prototype.snapTo = function snapTo (snapPts) {
-	  var coordList = new CoordinateList(this._srcPts);
-	  this.snapVertices(coordList, snapPts);
-	  this.snapSegments(coordList, snapPts);
-	  var newPts = coordList.toCoordinateArray();
-	  return newPts
-	};
-	LineStringSnapper.prototype.snapSegments = function snapSegments (srcCoords, snapPts) {
-	    var this$1 = this;
+	      var pluginProperties = plugin.call(this);
 
-	  if (snapPts.length === 0) { return null }
-	  var distinctPtCount = snapPts.length;
-	  if (snapPts[0].equals2D(snapPts[snapPts.length - 1])) { distinctPtCount = snapPts.length - 1; }
-	  for (var i = 0; i < distinctPtCount; i++) {
-	    var snapPt = snapPts[i];
-	    var index = this$1.findSegmentIndexToSnap(snapPt, srcCoords);
-	    if (index >= 0) {
-	      srcCoords.add(index + 1, new Coordinate(snapPt), false);
-	    }
-	  }
-	};
-	LineStringSnapper.prototype.findSegmentIndexToSnap = function findSegmentIndexToSnap (snapPt, srcCoords) {
-	    var this$1 = this;
+	      if (!isObject(pluginProperties)) {
+	        throw new Error('Plugins must return an object of function properties');
+	      } // Add the plugin function properties to this store instance.
+
+
+	      each$6(pluginProperties, function (pluginFnProp, propName) {
+	        if (!isFunction(pluginFnProp)) {
+	          throw new Error('Bad plugin property: ' + propName + ' from plugin ' + plugin.name + '. Plugins should only return functions.');
+	        }
+
+	        self._assignPluginFnProp(pluginFnProp, propName);
+	      });
+	    },
+	    // Put deprecated properties in the private API, so as to not expose it to accidential
+	    // discovery through inspection of the store object.
+	    // Deprecated: addStorage
+	    addStorage: function addStorage(storage) {
+	      _warn('store.addStorage(storage) is deprecated. Use createStore([storages])');
 
-	  var minDist = Double.MAX_VALUE;
-	  var snapIndex = -1;
-	  for (var i = 0; i < srcCoords.size() - 1; i++) {
-	    this$1._seg.p0 = srcCoords.get(i);
-	    this$1._seg.p1 = srcCoords.get(i + 1);
-	    if (this$1._seg.p0.equals2D(snapPt) || this$1._seg.p1.equals2D(snapPt)) {
-	      if (this$1._allowSnappingToSourceVertices) { continue; } else { return -1 }
+	      this._addStorage(storage);
 	    }
-	    var dist = this$1._seg.distance(snapPt);
-	    if (dist < this$1._snapTolerance && dist < minDist) {
-	      minDist = dist;
-	      snapIndex = i;
+	  };
+	  var store = create(_privateStoreProps, storeAPI, {
+	    plugins: []
+	  });
+	  store.raw = {};
+	  each$6(store, function (prop, propName) {
+	    if (isFunction(prop)) {
+	      store.raw[propName] = bind(store, prop);
 	    }
-	  }
-	  return snapIndex
-	};
-	LineStringSnapper.prototype.setAllowSnappingToSourceVertices = function setAllowSnappingToSourceVertices (allowSnappingToSourceVertices) {
-	  this._allowSnappingToSourceVertices = allowSnappingToSourceVertices;
-	};
-	LineStringSnapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	LineStringSnapper.prototype.getClass = function getClass () {
-	  return LineStringSnapper
-	};
-	LineStringSnapper.isClosed = function isClosed (pts) {
-	  if (pts.length <= 1) { return false }
-	  return pts[0].equals2D(pts[pts.length - 1])
-	};
+	  });
+	  each$6(storages, function (storage) {
+	    store._addStorage(storage);
+	  });
+	  each$6(plugins, function (plugin) {
+	    store._addPlugin(plugin);
+	  });
+	  return store;
+	}
 
-	var GeometrySnapper = function GeometrySnapper (srcGeom) {
-	  this._srcGeom = srcGeom || null;
+	var util$4 = util$6;
+	var Global$4 = util$4.Global;
+	var localStorage_1 = {
+	  name: 'localStorage',
+	  read: read$5,
+	  write: write$5,
+	  each: each$5,
+	  remove: remove$5,
+	  clearAll: clearAll$5
 	};
 
-	var staticAccessors$41 = { SNAP_PRECISION_FACTOR: { configurable: true } };
-	GeometrySnapper.prototype.snapTo = function snapTo (snapGeom, snapTolerance) {
-	  var snapPts = this.extractTargetCoordinates(snapGeom);
-	  var snapTrans = new SnapTransformer(snapTolerance, snapPts);
-	  return snapTrans.transform(this._srcGeom)
-	};
-	GeometrySnapper.prototype.snapToSelf = function snapToSelf (snapTolerance, cleanResult) {
-	  var snapPts = this.extractTargetCoordinates(this._srcGeom);
-	  var snapTrans = new SnapTransformer(snapTolerance, snapPts, true);
-	  var snappedGeom = snapTrans.transform(this._srcGeom);
-	  var result = snappedGeom;
-	  if (cleanResult && hasInterface(result, Polygonal)) {
-	    result = snappedGeom.buffer(0);
-	  }
-	  return result
-	};
-	GeometrySnapper.prototype.computeSnapTolerance = function computeSnapTolerance (ringPts) {
-	  var minSegLen = this.computeMinimumSegmentLength(ringPts);
-	  var snapTol = minSegLen / 10;
-	  return snapTol
-	};
-	GeometrySnapper.prototype.extractTargetCoordinates = function extractTargetCoordinates (g) {
-	  var ptSet = new TreeSet();
-	  var pts = g.getCoordinates();
-	  for (var i = 0; i < pts.length; i++) {
-	    ptSet.add(pts[i]);
-	  }
-	  return ptSet.toArray(new Array(0).fill(null))
-	};
-	GeometrySnapper.prototype.computeMinimumSegmentLength = function computeMinimumSegmentLength (pts) {
-	  var minSegLen = Double.MAX_VALUE;
-	  for (var i = 0; i < pts.length - 1; i++) {
-	    var segLen = pts[i].distance(pts[i + 1]);
-	    if (segLen < minSegLen) { minSegLen = segLen; }
-	  }
-	  return minSegLen
-	};
-	GeometrySnapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometrySnapper.prototype.getClass = function getClass () {
-	  return GeometrySnapper
-	};
-	GeometrySnapper.snap = function snap (g0, g1, snapTolerance) {
-	  var snapGeom = new Array(2).fill(null);
-	  var snapper0 = new GeometrySnapper(g0);
-	  snapGeom[0] = snapper0.snapTo(g1, snapTolerance);
-	  var snapper1 = new GeometrySnapper(g1);
-	  snapGeom[1] = snapper1.snapTo(snapGeom[0], snapTolerance);
-	  return snapGeom
-	};
-	GeometrySnapper.computeOverlaySnapTolerance = function computeOverlaySnapTolerance () {
-	  if (arguments.length === 1) {
-	    var g = arguments[0];
-	    var snapTolerance = GeometrySnapper.computeSizeBasedSnapTolerance(g);
-	    var pm = g.getPrecisionModel();
-	    if (pm.getType() === PrecisionModel.FIXED) {
-	      var fixedSnapTol = 1 / pm.getScale() * 2 / 1.415;
-	      if (fixedSnapTol > snapTolerance) { snapTolerance = fixedSnapTol; }
-	    }
-	    return snapTolerance
-	  } else if (arguments.length === 2) {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    return Math.min(GeometrySnapper.computeOverlaySnapTolerance(g0), GeometrySnapper.computeOverlaySnapTolerance(g1))
-	  }
-	};
-	GeometrySnapper.computeSizeBasedSnapTolerance = function computeSizeBasedSnapTolerance (g) {
-	  var env = g.getEnvelopeInternal();
-	  var minDimension = Math.min(env.getHeight(), env.getWidth());
-	  var snapTol = minDimension * GeometrySnapper.SNAP_PRECISION_FACTOR;
-	  return snapTol
-	};
-	GeometrySnapper.snapToSelf = function snapToSelf (geom, snapTolerance, cleanResult) {
-	  var snapper0 = new GeometrySnapper(geom);
-	  return snapper0.snapToSelf(snapTolerance, cleanResult)
-	};
-	staticAccessors$41.SNAP_PRECISION_FACTOR.get = function () { return 1e-9 };
+	function localStorage$1() {
+	  return Global$4.localStorage;
+	}
+
+	function read$5(key) {
+	  return localStorage$1().getItem(key);
+	}
 
-	Object.defineProperties( GeometrySnapper, staticAccessors$41 );
+	function write$5(key, data) {
+	  return localStorage$1().setItem(key, data);
+	}
 
-	var SnapTransformer = (function (GeometryTransformer$$1) {
-	  function SnapTransformer (snapTolerance, snapPts, isSelfSnap) {
-	    GeometryTransformer$$1.call(this);
-	    this._snapTolerance = snapTolerance || null;
-	    this._snapPts = snapPts || null;
-	    this._isSelfSnap = (isSelfSnap !== undefined) ? isSelfSnap : false;
+	function each$5(fn) {
+	  for (var i = localStorage$1().length - 1; i >= 0; i--) {
+	    var key = localStorage$1().key(i);
+	    fn(read$5(key), key);
 	  }
+	}
 
-	  if ( GeometryTransformer$$1 ) { SnapTransformer.__proto__ = GeometryTransformer$$1; }
-	  SnapTransformer.prototype = Object.create( GeometryTransformer$$1 && GeometryTransformer$$1.prototype );
-	  SnapTransformer.prototype.constructor = SnapTransformer;
-	  SnapTransformer.prototype.snapLine = function snapLine (srcPts, snapPts) {
-	    var snapper = new LineStringSnapper(srcPts, this._snapTolerance);
-	    snapper.setAllowSnappingToSourceVertices(this._isSelfSnap);
-	    return snapper.snapTo(snapPts)
-	  };
-	  SnapTransformer.prototype.transformCoordinates = function transformCoordinates (coords, parent) {
-	    var srcPts = coords.toCoordinateArray();
-	    var newPts = this.snapLine(srcPts, this._snapPts);
-	    return this._factory.getCoordinateSequenceFactory().create(newPts)
-	  };
-	  SnapTransformer.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  SnapTransformer.prototype.getClass = function getClass () {
-	    return SnapTransformer
-	  };
+	function remove$5(key) {
+	  return localStorage$1().removeItem(key);
+	}
 
-	  return SnapTransformer;
-	}(GeometryTransformer));
+	function clearAll$5() {
+	  return localStorage$1().clear();
+	}
 
-	var CommonBits = function CommonBits () {
-	  this._isFirst = true;
-	  this._commonMantissaBitsCount = 53;
-	  this._commonBits = 0;
-	  this._commonSignExp = null;
-	};
-	CommonBits.prototype.getCommon = function getCommon () {
-	  return Double.longBitsToDouble(this._commonBits)
-	};
-	CommonBits.prototype.add = function add (num) {
-	  var numBits = Double.doubleToLongBits(num);
-	  if (this._isFirst) {
-	    this._commonBits = numBits;
-	    this._commonSignExp = CommonBits.signExpBits(this._commonBits);
-	    this._isFirst = false;
-	    return null
-	  }
-	  var numSignExp = CommonBits.signExpBits(numBits);
-	  if (numSignExp !== this._commonSignExp) {
-	    this._commonBits = 0;
-	    return null
-	  }
-	  this._commonMantissaBitsCount = CommonBits.numCommonMostSigMantissaBits(this._commonBits, numBits);
-	  this._commonBits = CommonBits.zeroLowerBits(this._commonBits, 64 - (12 + this._commonMantissaBitsCount));
-	};
-	CommonBits.prototype.toString = function toString () {
-	  if (arguments.length === 1) {
-	    var bits = arguments[0];
-	    var x = Double.longBitsToDouble(bits);
-	    var numStr = Double.toBinaryString(bits);
-	    var padStr = '0000000000000000000000000000000000000000000000000000000000000000' + numStr;
-	    var bitStr = padStr.substring(padStr.length - 64);
-	    var str = bitStr.substring(0, 1) + '  ' + bitStr.substring(1, 12) + '(exp) ' + bitStr.substring(12) + ' [ ' + x + ' ]';
-	    return str
-	  }
-	};
-	CommonBits.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CommonBits.prototype.getClass = function getClass () {
-	  return CommonBits
-	};
-	CommonBits.getBit = function getBit (bits, i) {
-	  var mask = 1 << i;
-	  return (bits & mask) !== 0 ? 1 : 0
-	};
-	CommonBits.signExpBits = function signExpBits (num) {
-	  return num >> 52
-	};
-	CommonBits.zeroLowerBits = function zeroLowerBits (bits, nBits) {
-	  var invMask = (1 << nBits) - 1;
-	  var mask = ~invMask;
-	  var zeroed = bits & mask;
-	  return zeroed
-	};
-	CommonBits.numCommonMostSigMantissaBits = function numCommonMostSigMantissaBits (num1, num2) {
-	  var count = 0;
-	  for (var i = 52; i >= 0; i--) {
-	    if (CommonBits.getBit(num1, i) !== CommonBits.getBit(num2, i)) { return count }
-	    count++;
-	  }
-	  return 52
-	};
+	// versions 6 and 7, where no localStorage, etc
+	// is available.
 
-	var CommonBitsRemover = function CommonBitsRemover () {
-	  this._commonCoord = null;
-	  this._ccFilter = new CommonCoordinateFilter();
+	var util$3 = util$6;
+	var Global$3 = util$3.Global;
+	var oldFFGlobalStorage = {
+	  name: 'oldFF-globalStorage',
+	  read: read$4,
+	  write: write$4,
+	  each: each$4,
+	  remove: remove$4,
+	  clearAll: clearAll$4
 	};
+	var globalStorage = Global$3.globalStorage;
 
-	var staticAccessors$42 = { CommonCoordinateFilter: { configurable: true },Translater: { configurable: true } };
-	CommonBitsRemover.prototype.addCommonBits = function addCommonBits (geom) {
-	  var trans = new Translater(this._commonCoord);
-	  geom.apply(trans);
-	  geom.geometryChanged();
-	};
-	CommonBitsRemover.prototype.removeCommonBits = function removeCommonBits (geom) {
-	  if (this._commonCoord.x === 0.0 && this._commonCoord.y === 0.0) { return geom }
-	  var invCoord = new Coordinate(this._commonCoord);
-	  invCoord.x = -invCoord.x;
-	  invCoord.y = -invCoord.y;
-	  var trans = new Translater(invCoord);
-	  geom.apply(trans);
-	  geom.geometryChanged();
-	  return geom
-	};
-	CommonBitsRemover.prototype.getCommonCoordinate = function getCommonCoordinate () {
-	  return this._commonCoord
-	};
-	CommonBitsRemover.prototype.add = function add (geom) {
-	  geom.apply(this._ccFilter);
-	  this._commonCoord = this._ccFilter.getCommonCoordinate();
-	};
-	CommonBitsRemover.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CommonBitsRemover.prototype.getClass = function getClass () {
-	  return CommonBitsRemover
-	};
-	staticAccessors$42.CommonCoordinateFilter.get = function () { return CommonCoordinateFilter };
-	staticAccessors$42.Translater.get = function () { return Translater };
+	function read$4(key) {
+	  return globalStorage[key];
+	}
 
-	Object.defineProperties( CommonBitsRemover, staticAccessors$42 );
+	function write$4(key, data) {
+	  globalStorage[key] = data;
+	}
 
-	var CommonCoordinateFilter = function CommonCoordinateFilter () {
-	  this._commonBitsX = new CommonBits();
-	  this._commonBitsY = new CommonBits();
-	};
-	CommonCoordinateFilter.prototype.filter = function filter (coord) {
-	  this._commonBitsX.add(coord.x);
-	  this._commonBitsY.add(coord.y);
-	};
-	CommonCoordinateFilter.prototype.getCommonCoordinate = function getCommonCoordinate () {
-	  return new Coordinate(this._commonBitsX.getCommon(), this._commonBitsY.getCommon())
-	};
-	CommonCoordinateFilter.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateFilter]
-	};
-	CommonCoordinateFilter.prototype.getClass = function getClass () {
-	  return CommonCoordinateFilter
-	};
+	function each$4(fn) {
+	  for (var i = globalStorage.length - 1; i >= 0; i--) {
+	    var key = globalStorage.key(i);
+	    fn(globalStorage[key], key);
+	  }
+	}
 
-	var Translater = function Translater () {
-	  this.trans = null;
-	  var trans = arguments[0];
-	  this.trans = trans;
-	};
-	Translater.prototype.filter = function filter (seq, i) {
-	  var xp = seq.getOrdinate(i, 0) + this.trans.x;
-	  var yp = seq.getOrdinate(i, 1) + this.trans.y;
-	  seq.setOrdinate(i, 0, xp);
-	  seq.setOrdinate(i, 1, yp);
-	};
-	Translater.prototype.isDone = function isDone () {
-	  return false
-	};
-	Translater.prototype.isGeometryChanged = function isGeometryChanged () {
-	  return true
-	};
-	Translater.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateSequenceFilter]
-	};
-	Translater.prototype.getClass = function getClass () {
-	  return Translater
-	};
+	function remove$4(key) {
+	  return globalStorage.removeItem(key);
+	}
 
-	var SnapOverlayOp = function SnapOverlayOp (g1, g2) {
-	  this._geom = new Array(2).fill(null);
-	  this._snapTolerance = null;
-	  this._cbr = null;
-	  this._geom[0] = g1;
-	  this._geom[1] = g2;
-	  this.computeSnapTolerance();
-	};
-	SnapOverlayOp.prototype.selfSnap = function selfSnap (geom) {
-	  var snapper0 = new GeometrySnapper(geom);
-	  var snapGeom = snapper0.snapTo(geom, this._snapTolerance);
-	  return snapGeom
-	};
-	SnapOverlayOp.prototype.removeCommonBits = function removeCommonBits (geom) {
-	  this._cbr = new CommonBitsRemover();
-	  this._cbr.add(geom[0]);
-	  this._cbr.add(geom[1]);
-	  var remGeom = new Array(2).fill(null);
-	  remGeom[0] = this._cbr.removeCommonBits(geom[0].copy());
-	  remGeom[1] = this._cbr.removeCommonBits(geom[1].copy());
-	  return remGeom
-	};
-	SnapOverlayOp.prototype.prepareResult = function prepareResult (geom) {
-	  this._cbr.addCommonBits(geom);
-	  return geom
-	};
-	SnapOverlayOp.prototype.getResultGeometry = function getResultGeometry (opCode) {
-	  var prepGeom = this.snap(this._geom);
-	  var result = OverlayOp.overlayOp(prepGeom[0], prepGeom[1], opCode);
-	  return this.prepareResult(result)
-	};
-	SnapOverlayOp.prototype.checkValid = function checkValid (g) {
-	  if (!g.isValid()) {
-	    System.out.println('Snapped geometry is invalid');
-	  }
-	};
-	SnapOverlayOp.prototype.computeSnapTolerance = function computeSnapTolerance () {
-	  this._snapTolerance = GeometrySnapper.computeOverlaySnapTolerance(this._geom[0], this._geom[1]);
-	};
-	SnapOverlayOp.prototype.snap = function snap (geom) {
-	  var remGeom = this.removeCommonBits(geom);
-	  var snapGeom = GeometrySnapper.snap(remGeom[0], remGeom[1], this._snapTolerance);
-	  return snapGeom
-	};
-	SnapOverlayOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SnapOverlayOp.prototype.getClass = function getClass () {
-	  return SnapOverlayOp
-	};
-	SnapOverlayOp.overlayOp = function overlayOp (g0, g1, opCode) {
-	  var op = new SnapOverlayOp(g0, g1);
-	  return op.getResultGeometry(opCode)
-	};
-	SnapOverlayOp.union = function union (g0, g1) {
-	  return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.UNION)
-	};
-	SnapOverlayOp.intersection = function intersection (g0, g1) {
-	  return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.INTERSECTION)
-	};
-	SnapOverlayOp.symDifference = function symDifference (g0, g1) {
-	  return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.SYMDIFFERENCE)
-	};
-	SnapOverlayOp.difference = function difference (g0, g1) {
-	  return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.DIFFERENCE)
-	};
+	function clearAll$4() {
+	  each$4(function (key, _) {
+	    delete globalStorage[key];
+	  });
+	}
 
-	var SnapIfNeededOverlayOp = function SnapIfNeededOverlayOp (g1, g2) {
-	  this._geom = new Array(2).fill(null);
-	  this._geom[0] = g1;
-	  this._geom[1] = g2;
-	};
-	SnapIfNeededOverlayOp.prototype.getResultGeometry = function getResultGeometry (opCode) {
-	  var result = null;
-	  var isSuccess = false;
-	  var savedException = null;
-	  try {
-	    result = OverlayOp.overlayOp(this._geom[0], this._geom[1], opCode);
-	    var isValid = true;
-	    if (isValid) { isSuccess = true; }
-	  } catch (ex) {
-	    if (ex instanceof RuntimeException) {
-	      savedException = ex;
-	    } else { throw ex }
-	  } finally {}
-	  if (!isSuccess) {
-	    try {
-	      result = SnapOverlayOp.overlayOp(this._geom[0], this._geom[1], opCode);
-	    } catch (ex$1) {
-	      if (ex$1 instanceof RuntimeException) {
-	        throw savedException
-	      } else { throw ex$1 }
-	    } finally {}
-	  }
-	  return result
-	};
-	SnapIfNeededOverlayOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SnapIfNeededOverlayOp.prototype.getClass = function getClass () {
-	  return SnapIfNeededOverlayOp
-	};
-	SnapIfNeededOverlayOp.overlayOp = function overlayOp (g0, g1, opCode) {
-	  var op = new SnapIfNeededOverlayOp(g0, g1);
-	  return op.getResultGeometry(opCode)
-	};
-	SnapIfNeededOverlayOp.union = function union (g0, g1) {
-	  return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.UNION)
-	};
-	SnapIfNeededOverlayOp.intersection = function intersection (g0, g1) {
-	  return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.INTERSECTION)
-	};
-	SnapIfNeededOverlayOp.symDifference = function symDifference (g0, g1) {
-	  return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.SYMDIFFERENCE)
-	};
-	SnapIfNeededOverlayOp.difference = function difference (g0, g1) {
-	  return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.DIFFERENCE)
-	};
+	// versions 6 and 7, where no localStorage, sessionStorage, etc
+	// is available.
 
-	var MonotoneChain$2 = function MonotoneChain () {
-	  this.mce = null;
-	  this.chainIndex = null;
-	  var mce = arguments[0];
-	  var chainIndex = arguments[1];
-	  this.mce = mce;
-	  this.chainIndex = chainIndex;
-	};
-	MonotoneChain$2.prototype.computeIntersections = function computeIntersections (mc, si) {
-	  this.mce.computeIntersectsForChain(this.chainIndex, mc.mce, mc.chainIndex, si);
-	};
-	MonotoneChain$2.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChain$2.prototype.getClass = function getClass () {
-	  return MonotoneChain$2
+	var util$2 = util$6;
+	var Global$2 = util$2.Global;
+	var oldIEUserDataStorage = {
+	  name: 'oldIE-userDataStorage',
+	  write: write$3,
+	  read: read$3,
+	  each: each$3,
+	  remove: remove$3,
+	  clearAll: clearAll$3
 	};
+	var storageName = 'storejs';
+	var doc$1 = Global$2.document;
 
-	var SweepLineEvent = function SweepLineEvent () {
-	  this._label = null;
-	  this._xValue = null;
-	  this._eventType = null;
-	  this._insertEvent = null;
-	  this._deleteEventIndex = null;
-	  this._obj = null;
-	  if (arguments.length === 2) {
-	    var x = arguments[0];
-	    var insertEvent = arguments[1];
-	    this._eventType = SweepLineEvent.DELETE;
-	    this._xValue = x;
-	    this._insertEvent = insertEvent;
-	  } else if (arguments.length === 3) {
-	    var label = arguments[0];
-	    var x$1 = arguments[1];
-	    var obj = arguments[2];
-	    this._eventType = SweepLineEvent.INSERT;
-	    this._label = label;
-	    this._xValue = x$1;
-	    this._obj = obj;
-	  }
-	};
+	var _withStorageEl = _makeIEStorageElFunction();
 
-	var staticAccessors$43 = { INSERT: { configurable: true },DELETE: { configurable: true } };
-	SweepLineEvent.prototype.isDelete = function isDelete () {
-	  return this._eventType === SweepLineEvent.DELETE
-	};
-	SweepLineEvent.prototype.setDeleteEventIndex = function setDeleteEventIndex (deleteEventIndex) {
-	  this._deleteEventIndex = deleteEventIndex;
-	};
-	SweepLineEvent.prototype.getObject = function getObject () {
-	  return this._obj
-	};
-	SweepLineEvent.prototype.compareTo = function compareTo (o) {
-	  var pe = o;
-	  if (this._xValue < pe._xValue) { return -1 }
-	  if (this._xValue > pe._xValue) { return 1 }
-	  if (this._eventType < pe._eventType) { return -1 }
-	  if (this._eventType > pe._eventType) { return 1 }
-	  return 0
-	};
-	SweepLineEvent.prototype.getInsertEvent = function getInsertEvent () {
-	  return this._insertEvent
-	};
-	SweepLineEvent.prototype.isInsert = function isInsert () {
-	  return this._eventType === SweepLineEvent.INSERT
-	};
-	SweepLineEvent.prototype.isSameLabel = function isSameLabel (ev) {
-	  if (this._label === null) { return false }
-	  return this._label === ev._label
-	};
-	SweepLineEvent.prototype.getDeleteEventIndex = function getDeleteEventIndex () {
-	  return this._deleteEventIndex
-	};
-	SweepLineEvent.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	SweepLineEvent.prototype.getClass = function getClass () {
-	  return SweepLineEvent
-	};
-	staticAccessors$43.INSERT.get = function () { return 1 };
-	staticAccessors$43.DELETE.get = function () { return 2 };
+	var disable = (Global$2.navigator ? Global$2.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
 
-	Object.defineProperties( SweepLineEvent, staticAccessors$43 );
+	function write$3(unfixedKey, data) {
+	  if (disable) {
+	    return;
+	  }
 
-	var EdgeSetIntersector = function EdgeSetIntersector () {};
+	  var fixedKey = fixKey(unfixedKey);
 
-	EdgeSetIntersector.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeSetIntersector.prototype.getClass = function getClass () {
-	  return EdgeSetIntersector
-	};
+	  _withStorageEl(function (storageEl) {
+	    storageEl.setAttribute(fixedKey, data);
+	    storageEl.save(storageName);
+	  });
+	}
 
-	var SegmentIntersector$2 = function SegmentIntersector () {
-	  this._hasIntersection = false;
-	  this._hasProper = false;
-	  this._hasProperInterior = false;
-	  this._properIntersectionPoint = null;
-	  this._li = null;
-	  this._includeProper = null;
-	  this._recordIsolated = null;
-	  this._isSelfIntersection = null;
-	  this._numIntersections = 0;
-	  this.numTests = 0;
-	  this._bdyNodes = null;
-	  this._isDone = false;
-	  this._isDoneWhenProperInt = false;
-	  var li = arguments[0];
-	  var includeProper = arguments[1];
-	  var recordIsolated = arguments[2];
-	  this._li = li;
-	  this._includeProper = includeProper;
-	  this._recordIsolated = recordIsolated;
-	};
-	SegmentIntersector$2.prototype.isTrivialIntersection = function isTrivialIntersection (e0, segIndex0, e1, segIndex1) {
-	  if (e0 === e1) {
-	    if (this._li.getIntersectionNum() === 1) {
-	      if (SegmentIntersector$2.isAdjacentSegments(segIndex0, segIndex1)) { return true }
-	      if (e0.isClosed()) {
-	        var maxSegIndex = e0.getNumPoints() - 1;
-	        if ((segIndex0 === 0 && segIndex1 === maxSegIndex) ||
-	            (segIndex1 === 0 && segIndex0 === maxSegIndex)) {
-	          return true
-	        }
-	      }
-	    }
-	  }
-	  return false
-	};
-	SegmentIntersector$2.prototype.getProperIntersectionPoint = function getProperIntersectionPoint () {
-	  return this._properIntersectionPoint
-	};
-	SegmentIntersector$2.prototype.setIsDoneIfProperInt = function setIsDoneIfProperInt (isDoneWhenProperInt) {
-	  this._isDoneWhenProperInt = isDoneWhenProperInt;
-	};
-	SegmentIntersector$2.prototype.hasProperInteriorIntersection = function hasProperInteriorIntersection () {
-	  return this._hasProperInterior
-	};
-	SegmentIntersector$2.prototype.isBoundaryPointInternal = function isBoundaryPointInternal (li, bdyNodes) {
-	  for (var i = bdyNodes.iterator(); i.hasNext();) {
-	    var node = i.next();
-	    var pt = node.getCoordinate();
-	    if (li.isIntersection(pt)) { return true }
-	  }
-	  return false
-	};
-	SegmentIntersector$2.prototype.hasProperIntersection = function hasProperIntersection () {
-	  return this._hasProper
-	};
-	SegmentIntersector$2.prototype.hasIntersection = function hasIntersection () {
-	  return this._hasIntersection
-	};
-	SegmentIntersector$2.prototype.isDone = function isDone () {
-	  return this._isDone
-	};
-	SegmentIntersector$2.prototype.isBoundaryPoint = function isBoundaryPoint (li, bdyNodes) {
-	  if (bdyNodes === null) { return false }
-	  if (this.isBoundaryPointInternal(li, bdyNodes[0])) { return true }
-	  if (this.isBoundaryPointInternal(li, bdyNodes[1])) { return true }
-	  return false
-	};
-	SegmentIntersector$2.prototype.setBoundaryNodes = function setBoundaryNodes (bdyNodes0, bdyNodes1) {
-	  this._bdyNodes = new Array(2).fill(null);
-	  this._bdyNodes[0] = bdyNodes0;
-	  this._bdyNodes[1] = bdyNodes1;
-	};
-	SegmentIntersector$2.prototype.addIntersections = function addIntersections (e0, segIndex0, e1, segIndex1) {
-	  if (e0 === e1 && segIndex0 === segIndex1) { return null }
-	  this.numTests++;
-	  var p00 = e0.getCoordinates()[segIndex0];
-	  var p01 = e0.getCoordinates()[segIndex0 + 1];
-	  var p10 = e1.getCoordinates()[segIndex1];
-	  var p11 = e1.getCoordinates()[segIndex1 + 1];
-	  this._li.computeIntersection(p00, p01, p10, p11);
-	  if (this._li.hasIntersection()) {
-	    if (this._recordIsolated) {
-	      e0.setIsolated(false);
-	      e1.setIsolated(false);
-	    }
-	    this._numIntersections++;
-	    if (!this.isTrivialIntersection(e0, segIndex0, e1, segIndex1)) {
-	      this._hasIntersection = true;
-	      if (this._includeProper || !this._li.isProper()) {
-	        e0.addIntersections(this._li, segIndex0, 0);
-	        e1.addIntersections(this._li, segIndex1, 1);
-	      }
-	      if (this._li.isProper()) {
-	        this._properIntersectionPoint = this._li.getIntersection(0).copy();
-	        this._hasProper = true;
-	        if (this._isDoneWhenProperInt) {
-	          this._isDone = true;
-	        }
-	        if (!this.isBoundaryPoint(this._li, this._bdyNodes)) { this._hasProperInterior = true; }
-	      }
-	    }
+	function read$3(unfixedKey) {
+	  if (disable) {
+	    return;
 	  }
-	};
-	SegmentIntersector$2.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SegmentIntersector$2.prototype.getClass = function getClass () {
-	  return SegmentIntersector$2
-	};
-	SegmentIntersector$2.isAdjacentSegments = function isAdjacentSegments (i1, i2) {
-	  return Math.abs(i1 - i2) === 1
-	};
 
-	var SimpleMCSweepLineIntersector = (function (EdgeSetIntersector$$1) {
-	  function SimpleMCSweepLineIntersector () {
-	    EdgeSetIntersector$$1.call(this);
-	    this.events = new ArrayList();
-	    this.nOverlaps = null;
-	  }
+	  var fixedKey = fixKey(unfixedKey);
+	  var res = null;
 
-	  if ( EdgeSetIntersector$$1 ) { SimpleMCSweepLineIntersector.__proto__ = EdgeSetIntersector$$1; }
-	  SimpleMCSweepLineIntersector.prototype = Object.create( EdgeSetIntersector$$1 && EdgeSetIntersector$$1.prototype );
-	  SimpleMCSweepLineIntersector.prototype.constructor = SimpleMCSweepLineIntersector;
-	  SimpleMCSweepLineIntersector.prototype.prepareEvents = function prepareEvents () {
-	    var this$1 = this;
+	  _withStorageEl(function (storageEl) {
+	    res = storageEl.getAttribute(fixedKey);
+	  });
 
-	    Collections.sort(this.events);
-	    for (var i = 0; i < this.events.size(); i++) {
-	      var ev = this$1.events.get(i);
-	      if (ev.isDelete()) {
-	        ev.getInsertEvent().setDeleteEventIndex(i);
-	      }
-	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.computeIntersections = function computeIntersections () {
-	    var this$1 = this;
+	  return res;
+	}
 
-	    if (arguments.length === 1) {
-	      var si = arguments[0];
-	      this.nOverlaps = 0;
-	      this.prepareEvents();
-	      for (var i = 0; i < this.events.size(); i++) {
-	        var ev = this$1.events.get(i);
-	        if (ev.isInsert()) {
-	          this$1.processOverlaps(i, ev.getDeleteEventIndex(), ev, si);
-	        }
-	        if (si.isDone()) {
-	          break
-	        }
-	      }
-	    } else if (arguments.length === 3) {
-	      if (arguments[2] instanceof SegmentIntersector$2 && (hasInterface(arguments[0], List) && hasInterface(arguments[1], List))) {
-	        var edges0 = arguments[0];
-	        var edges1 = arguments[1];
-	        var si$1 = arguments[2];
-	        this.addEdges(edges0, edges0);
-	        this.addEdges(edges1, edges1);
-	        this.computeIntersections(si$1);
-	      } else if (typeof arguments[2] === 'boolean' && (hasInterface(arguments[0], List) && arguments[1] instanceof SegmentIntersector$2)) {
-	        var edges = arguments[0];
-	        var si$2 = arguments[1];
-	        var testAllSegments = arguments[2];
-	        if (testAllSegments) { this.addEdges(edges, null); } else { this.addEdges(edges); }
-	        this.computeIntersections(si$2);
-	      }
-	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.addEdge = function addEdge (edge, edgeSet) {
-	    var this$1 = this;
+	function each$3(callback) {
+	  _withStorageEl(function (storageEl) {
+	    var attributes = storageEl.XMLDocument.documentElement.attributes;
 
-	    var mce = edge.getMonotoneChainEdge();
-	    var startIndex = mce.getStartIndexes();
-	    for (var i = 0; i < startIndex.length - 1; i++) {
-	      var mc = new MonotoneChain$2(mce, i);
-	      var insertEvent = new SweepLineEvent(edgeSet, mce.getMinX(i), mc);
-	      this$1.events.add(insertEvent);
-	      this$1.events.add(new SweepLineEvent(mce.getMaxX(i), insertEvent));
+	    for (var i = attributes.length - 1; i >= 0; i--) {
+	      var attr = attributes[i];
+	      callback(storageEl.getAttribute(attr.name), attr.name);
 	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.processOverlaps = function processOverlaps (start, end, ev0, si) {
-	    var this$1 = this;
+	  });
+	}
 
-	    var mc0 = ev0.getObject();
-	    for (var i = start; i < end; i++) {
-	      var ev1 = this$1.events.get(i);
-	      if (ev1.isInsert()) {
-	        var mc1 = ev1.getObject();
-	        if (!ev0.isSameLabel(ev1)) {
-	          mc0.computeIntersections(mc1, si);
-	          this$1.nOverlaps++;
-	        }
-	      }
-	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.addEdges = function addEdges () {
-	    var this$1 = this;
+	function remove$3(unfixedKey) {
+	  var fixedKey = fixKey(unfixedKey);
 
-	    if (arguments.length === 1) {
-	      var edges = arguments[0];
-	      for (var i = edges.iterator(); i.hasNext();) {
-	        var edge = i.next();
-	        this$1.addEdge(edge, edge);
-	      }
-	    } else if (arguments.length === 2) {
-	      var edges$1 = arguments[0];
-	      var edgeSet = arguments[1];
-	      for (var i$1 = edges$1.iterator(); i$1.hasNext();) {
-	        var edge$1 = i$1.next();
-	        this$1.addEdge(edge$1, edgeSet);
-	      }
-	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  SimpleMCSweepLineIntersector.prototype.getClass = function getClass () {
-	    return SimpleMCSweepLineIntersector
-	  };
+	  _withStorageEl(function (storageEl) {
+	    storageEl.removeAttribute(fixedKey);
+	    storageEl.save(storageName);
+	  });
+	}
 
-	  return SimpleMCSweepLineIntersector;
-	}(EdgeSetIntersector));
+	function clearAll$3() {
+	  _withStorageEl(function (storageEl) {
+	    var attributes = storageEl.XMLDocument.documentElement.attributes;
+	    storageEl.load(storageName);
 
-	var IntervalRTreeNode = function IntervalRTreeNode () {
-	  this._min = Double.POSITIVE_INFINITY;
-	  this._max = Double.NEGATIVE_INFINITY;
-	};
+	    for (var i = attributes.length - 1; i >= 0; i--) {
+	      storageEl.removeAttribute(attributes[i].name);
+	    }
 
-	var staticAccessors$45 = { NodeComparator: { configurable: true } };
-	IntervalRTreeNode.prototype.getMin = function getMin () {
-	  return this._min
-	};
-	IntervalRTreeNode.prototype.intersects = function intersects (queryMin, queryMax) {
-	  if (this._min > queryMax || this._max < queryMin) { return false }
-	  return true
-	};
-	IntervalRTreeNode.prototype.getMax = function getMax () {
-	  return this._max
-	};
-	IntervalRTreeNode.prototype.toString = function toString () {
-	  return WKTWriter.toLineString(new Coordinate(this._min, 0), new Coordinate(this._max, 0))
-	};
-	IntervalRTreeNode.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	IntervalRTreeNode.prototype.getClass = function getClass () {
-	  return IntervalRTreeNode
-	};
-	staticAccessors$45.NodeComparator.get = function () { return NodeComparator };
+	    storageEl.save(storageName);
+	  });
+	} // Helpers
+	//////////
+	// In IE7, keys cannot start with a digit or contain certain chars.
+	// See https://github.com/marcuswestin/store.js/issues/40
+	// See https://github.com/marcuswestin/store.js/issues/83
 
-	Object.defineProperties( IntervalRTreeNode, staticAccessors$45 );
 
-	var NodeComparator = function NodeComparator () {};
+	var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
 
-	NodeComparator.prototype.compare = function compare (o1, o2) {
-	  var n1 = o1;
-	  var n2 = o2;
-	  var mid1 = (n1._min + n1._max) / 2;
-	  var mid2 = (n2._min + n2._max) / 2;
-	  if (mid1 < mid2) { return -1 }
-	  if (mid1 > mid2) { return 1 }
-	  return 0
-	};
-	NodeComparator.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparator]
-	};
-	NodeComparator.prototype.getClass = function getClass () {
-	  return NodeComparator
-	};
+	function fixKey(key) {
+	  return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___');
+	}
 
-	var IntervalRTreeLeafNode = (function (IntervalRTreeNode$$1) {
-	  function IntervalRTreeLeafNode () {
-	    IntervalRTreeNode$$1.call(this);
-	    this._item = null;
-	    var min = arguments[0];
-	    var max = arguments[1];
-	    var item = arguments[2];
-	    this._min = min;
-	    this._max = max;
-	    this._item = item;
+	function _makeIEStorageElFunction() {
+	  if (!doc$1 || !doc$1.documentElement || !doc$1.documentElement.addBehavior) {
+	    return null;
 	  }
 
-	  if ( IntervalRTreeNode$$1 ) { IntervalRTreeLeafNode.__proto__ = IntervalRTreeNode$$1; }
-	  IntervalRTreeLeafNode.prototype = Object.create( IntervalRTreeNode$$1 && IntervalRTreeNode$$1.prototype );
-	  IntervalRTreeLeafNode.prototype.constructor = IntervalRTreeLeafNode;
-	  IntervalRTreeLeafNode.prototype.query = function query (queryMin, queryMax, visitor) {
-	    if (!this.intersects(queryMin, queryMax)) { return null }
-	    visitor.visitItem(this._item);
-	  };
-	  IntervalRTreeLeafNode.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  IntervalRTreeLeafNode.prototype.getClass = function getClass () {
-	    return IntervalRTreeLeafNode
+	  var scriptTag = 'script',
+	      storageOwner,
+	      storageContainer,
+	      storageEl; // Since #userData storage applies only to specific paths, we need to
+	  // somehow link our data to a specific path.  We choose /favicon.ico
+	  // as a pretty safe option, since all browsers already make a request to
+	  // this URL anyway and being a 404 will not hurt us here.  We wrap an
+	  // iframe pointing to the favicon in an ActiveXObject(htmlfile) object
+	  // (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)
+	  // since the iframe access rules appear to allow direct access and
+	  // manipulation of the document element, even for a 404 page.  This
+	  // document can be used instead of the current document (which would
+	  // have been limited to the current path) to perform #userData storage.
+
+	  try {
+	    /* global ActiveXObject */
+	    storageContainer = new ActiveXObject('htmlfile');
+	    storageContainer.open();
+	    storageContainer.write('<' + scriptTag + '>document.w=window</' + scriptTag + '><iframe src="/favicon.ico"></iframe>');
+	    storageContainer.close();
+	    storageOwner = storageContainer.w.frames[0].document;
+	    storageEl = storageOwner.createElement('div');
+	  } catch (e) {
+	    // somehow ActiveXObject instantiation failed (perhaps some special
+	    // security settings or otherwse), fall back to per-path storage
+	    storageEl = doc$1.createElement('div');
+	    storageOwner = doc$1.body;
+	  }
+
+	  return function (storeFunction) {
+	    var args = [].slice.call(arguments, 0);
+	    args.unshift(storageEl); // See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
+	    // and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx
+
+	    storageOwner.appendChild(storageEl);
+	    storageEl.addBehavior('#default#userData');
+	    storageEl.load(storageName);
+	    storeFunction.apply(this, args);
+	    storageOwner.removeChild(storageEl);
+	    return;
 	  };
+	}
+
+	// doesn't work but cookies do. This implementation is adopted from
+	// https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage
 
-	  return IntervalRTreeLeafNode;
-	}(IntervalRTreeNode));
+	var util$1 = util$6;
+	var Global$1 = util$1.Global;
+	var trim = util$1.trim;
+	var cookieStorage = {
+	  name: 'cookieStorage',
+	  read: read$2,
+	  write: write$2,
+	  each: each$2,
+	  remove: remove$2,
+	  clearAll: clearAll$2
+	};
+	var doc = Global$1.document;
 
-	var IntervalRTreeBranchNode = (function (IntervalRTreeNode$$1) {
-	  function IntervalRTreeBranchNode () {
-	    IntervalRTreeNode$$1.call(this);
-	    this._node1 = null;
-	    this._node2 = null;
-	    var n1 = arguments[0];
-	    var n2 = arguments[1];
-	    this._node1 = n1;
-	    this._node2 = n2;
-	    this.buildExtent(this._node1, this._node2);
+	function read$2(key) {
+	  if (!key || !_has(key)) {
+	    return null;
 	  }
 
-	  if ( IntervalRTreeNode$$1 ) { IntervalRTreeBranchNode.__proto__ = IntervalRTreeNode$$1; }
-	  IntervalRTreeBranchNode.prototype = Object.create( IntervalRTreeNode$$1 && IntervalRTreeNode$$1.prototype );
-	  IntervalRTreeBranchNode.prototype.constructor = IntervalRTreeBranchNode;
-	  IntervalRTreeBranchNode.prototype.buildExtent = function buildExtent (n1, n2) {
-	    this._min = Math.min(n1._min, n2._min);
-	    this._max = Math.max(n1._max, n2._max);
-	  };
-	  IntervalRTreeBranchNode.prototype.query = function query (queryMin, queryMax, visitor) {
-	    if (!this.intersects(queryMin, queryMax)) {
-	      return null
-	    }
-	    if (this._node1 !== null) { this._node1.query(queryMin, queryMax, visitor); }
-	    if (this._node2 !== null) { this._node2.query(queryMin, queryMax, visitor); }
-	  };
-	  IntervalRTreeBranchNode.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  IntervalRTreeBranchNode.prototype.getClass = function getClass () {
-	    return IntervalRTreeBranchNode
-	  };
+	  var regexpStr = "(?:^|.*;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
+	  return unescape(doc.cookie.replace(new RegExp(regexpStr), "$1"));
+	}
 
-	  return IntervalRTreeBranchNode;
-	}(IntervalRTreeNode));
+	function each$2(callback) {
+	  var cookies = doc.cookie.split(/; ?/g);
 
-	var SortedPackedIntervalRTree = function SortedPackedIntervalRTree () {
-	  this._leaves = new ArrayList();
-	  this._root = null;
-	  this._level = 0;
-	};
-	SortedPackedIntervalRTree.prototype.buildTree = function buildTree () {
-	    var this$1 = this;
+	  for (var i = cookies.length - 1; i >= 0; i--) {
+	    if (!trim(cookies[i])) {
+	      continue;
+	    }
 
-	  Collections.sort(this._leaves, new IntervalRTreeNode.NodeComparator());
-	  var src = this._leaves;
-	  var temp = null;
-	  var dest = new ArrayList();
-	  while (true) {
-	    this$1.buildLevel(src, dest);
-	    if (dest.size() === 1) { return dest.get(0) }
-	    temp = src;
-	    src = dest;
-	    dest = temp;
+	    var kvp = cookies[i].split('=');
+	    var key = unescape(kvp[0]);
+	    var val = unescape(kvp[1]);
+	    callback(val, key);
 	  }
-	};
-	SortedPackedIntervalRTree.prototype.insert = function insert (min, max, item) {
-	  if (this._root !== null) { throw new Error('Index cannot be added to once it has been queried') }
-	  this._leaves.add(new IntervalRTreeLeafNode(min, max, item));
-	};
-	SortedPackedIntervalRTree.prototype.query = function query (min, max, visitor) {
-	  this.init();
-	  this._root.query(min, max, visitor);
-	};
-	SortedPackedIntervalRTree.prototype.buildRoot = function buildRoot () {
-	  if (this._root !== null) { return null }
-	  this._root = this.buildTree();
-	};
-	SortedPackedIntervalRTree.prototype.printNode = function printNode (node) {
-	  System.out.println(WKTWriter.toLineString(new Coordinate(node._min, this._level), new Coordinate(node._max, this._level)));
-	};
-	SortedPackedIntervalRTree.prototype.init = function init () {
-	  if (this._root !== null) { return null }
-	  this.buildRoot();
-	};
-	SortedPackedIntervalRTree.prototype.buildLevel = function buildLevel (src, dest) {
-	  this._level++;
-	  dest.clear();
-	  for (var i = 0; i < src.size(); i += 2) {
-	    var n1 = src.get(i);
-	    var n2 = i + 1 < src.size() ? src.get(i) : null;
-	    if (n2 === null) {
-	      dest.add(n1);
-	    } else {
-	      var node = new IntervalRTreeBranchNode(src.get(i), src.get(i + 1));
-	      dest.add(node);
-	    }
+	}
+
+	function write$2(key, data) {
+	  if (!key) {
+	    return;
 	  }
-	};
-	SortedPackedIntervalRTree.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SortedPackedIntervalRTree.prototype.getClass = function getClass () {
-	  return SortedPackedIntervalRTree
-	};
 
-	var ArrayListVisitor = function ArrayListVisitor () {
-	  this._items = new ArrayList();
-	};
-	ArrayListVisitor.prototype.visitItem = function visitItem (item) {
-	  this._items.add(item);
-	};
-	ArrayListVisitor.prototype.getItems = function getItems () {
-	  return this._items
-	};
-	ArrayListVisitor.prototype.interfaces_ = function interfaces_ () {
-	  return [ItemVisitor]
-	};
-	ArrayListVisitor.prototype.getClass = function getClass () {
-	  return ArrayListVisitor
-	};
+	  doc.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
+	}
 
-	var IndexedPointInAreaLocator = function IndexedPointInAreaLocator () {
-	  this._index = null;
-	  var g = arguments[0];
-	  if (!hasInterface(g, Polygonal)) { throw new IllegalArgumentException('Argument must be Polygonal') }
-	  this._index = new IntervalIndexedGeometry(g);
-	};
+	function remove$2(key) {
+	  if (!key || !_has(key)) {
+	    return;
+	  }
 
-	var staticAccessors$44 = { SegmentVisitor: { configurable: true },IntervalIndexedGeometry: { configurable: true } };
-	IndexedPointInAreaLocator.prototype.locate = function locate (p) {
-	  var rcc = new RayCrossingCounter(p);
-	  var visitor = new SegmentVisitor(rcc);
-	  this._index.query(p.y, p.y, visitor);
-	  return rcc.getLocation()
-	};
-	IndexedPointInAreaLocator.prototype.interfaces_ = function interfaces_ () {
-	  return [PointOnGeometryLocator]
-	};
-	IndexedPointInAreaLocator.prototype.getClass = function getClass () {
-	  return IndexedPointInAreaLocator
-	};
-	staticAccessors$44.SegmentVisitor.get = function () { return SegmentVisitor };
-	staticAccessors$44.IntervalIndexedGeometry.get = function () { return IntervalIndexedGeometry };
+	  doc.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
+	}
 
-	Object.defineProperties( IndexedPointInAreaLocator, staticAccessors$44 );
+	function clearAll$2() {
+	  each$2(function (_, key) {
+	    remove$2(key);
+	  });
+	}
 
-	var SegmentVisitor = function SegmentVisitor () {
-	  this._counter = null;
-	  var counter = arguments[0];
-	  this._counter = counter;
-	};
-	SegmentVisitor.prototype.visitItem = function visitItem (item) {
-	  var seg = item;
-	  this._counter.countSegment(seg.getCoordinate(0), seg.getCoordinate(1));
-	};
-	SegmentVisitor.prototype.interfaces_ = function interfaces_ () {
-	  return [ItemVisitor]
-	};
-	SegmentVisitor.prototype.getClass = function getClass () {
-	  return SegmentVisitor
-	};
+	function _has(key) {
+	  return new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=").test(doc.cookie);
+	}
 
-	var IntervalIndexedGeometry = function IntervalIndexedGeometry () {
-	  this._index = new SortedPackedIntervalRTree();
-	  var geom = arguments[0];
-	  this.init(geom);
+	var util = util$6;
+	var Global = util.Global;
+	var sessionStorage_1 = {
+	  name: 'sessionStorage',
+	  read: read$1,
+	  write: write$1,
+	  each: each$1,
+	  remove: remove$1,
+	  clearAll: clearAll$1
 	};
-	IntervalIndexedGeometry.prototype.init = function init (geom) {
-	    var this$1 = this;
 
-	  var lines = LinearComponentExtracter.getLines(geom);
-	  for (var i = lines.iterator(); i.hasNext();) {
-	    var line = i.next();
-	    var pts = line.getCoordinates();
-	    this$1.addLine(pts);
-	  }
-	};
-	IntervalIndexedGeometry.prototype.addLine = function addLine (pts) {
-	    var this$1 = this;
+	function sessionStorage() {
+	  return Global.sessionStorage;
+	}
 
-	  for (var i = 1; i < pts.length; i++) {
-	    var seg = new LineSegment(pts[i - 1], pts[i]);
-	    var min = Math.min(seg.p0.y, seg.p1.y);
-	    var max = Math.max(seg.p0.y, seg.p1.y);
-	    this$1._index.insert(min, max, seg);
-	  }
-	};
-	IntervalIndexedGeometry.prototype.query = function query () {
-	  if (arguments.length === 2) {
-	    var min = arguments[0];
-	    var max = arguments[1];
-	    var visitor = new ArrayListVisitor();
-	    this._index.query(min, max, visitor);
-	    return visitor.getItems()
-	  } else if (arguments.length === 3) {
-	    var min$1 = arguments[0];
-	    var max$1 = arguments[1];
-	    var visitor$1 = arguments[2];
-	    this._index.query(min$1, max$1, visitor$1);
-	  }
-	};
-	IntervalIndexedGeometry.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	IntervalIndexedGeometry.prototype.getClass = function getClass () {
-	  return IntervalIndexedGeometry
-	};
+	function read$1(key) {
+	  return sessionStorage().getItem(key);
+	}
 
-	var GeometryGraph = (function (PlanarGraph$$1) {
-	  function GeometryGraph () {
-	    PlanarGraph$$1.call(this);
-	    this._parentGeom = null;
-	    this._lineEdgeMap = new HashMap();
-	    this._boundaryNodeRule = null;
-	    this._useBoundaryDeterminationRule = true;
-	    this._argIndex = null;
-	    this._boundaryNodes = null;
-	    this._hasTooFewPoints = false;
-	    this._invalidPoint = null;
-	    this._areaPtLocator = null;
-	    this._ptLocator = new PointLocator();
-	    if (arguments.length === 2) {
-	      var argIndex = arguments[0];
-	      var parentGeom = arguments[1];
-	      var boundaryNodeRule = BoundaryNodeRule.OGC_SFS_BOUNDARY_RULE;
-	      this._argIndex = argIndex;
-	      this._parentGeom = parentGeom;
-	      this._boundaryNodeRule = boundaryNodeRule;
-	      if (parentGeom !== null) {
-	        this.add(parentGeom);
-	      }
-	    } else if (arguments.length === 3) {
-	      var argIndex$1 = arguments[0];
-	      var parentGeom$1 = arguments[1];
-	      var boundaryNodeRule$1 = arguments[2];
-	      this._argIndex = argIndex$1;
-	      this._parentGeom = parentGeom$1;
-	      this._boundaryNodeRule = boundaryNodeRule$1;
-	      if (parentGeom$1 !== null) {
-	        this.add(parentGeom$1);
-	      }
-	    }
-	  }
-
-	  if ( PlanarGraph$$1 ) { GeometryGraph.__proto__ = PlanarGraph$$1; }
-	  GeometryGraph.prototype = Object.create( PlanarGraph$$1 && PlanarGraph$$1.prototype );
-	  GeometryGraph.prototype.constructor = GeometryGraph;
-	  GeometryGraph.prototype.insertBoundaryPoint = function insertBoundaryPoint (argIndex, coord) {
-	    var n = this._nodes.addNode(coord);
-	    var lbl = n.getLabel();
-	    var boundaryCount = 1;
-	    var loc = Location.NONE;
-	    loc = lbl.getLocation(argIndex, Position.ON);
-	    if (loc === Location.BOUNDARY) { boundaryCount++; }
-	    var newLoc = GeometryGraph.determineBoundary(this._boundaryNodeRule, boundaryCount);
-	    lbl.setLocation(argIndex, newLoc);
-	  };
-	  GeometryGraph.prototype.computeSelfNodes = function computeSelfNodes () {
-	    if (arguments.length === 2) {
-	      var li = arguments[0];
-	      var computeRingSelfNodes = arguments[1];
-	      return this.computeSelfNodes(li, computeRingSelfNodes, false)
-	    } else if (arguments.length === 3) {
-	      var li$1 = arguments[0];
-	      var computeRingSelfNodes$1 = arguments[1];
-	      var isDoneIfProperInt = arguments[2];
-	      var si = new SegmentIntersector$2(li$1, true, false);
-	      si.setIsDoneIfProperInt(isDoneIfProperInt);
-	      var esi = this.createEdgeSetIntersector();
-	      var isRings = this._parentGeom instanceof LinearRing || this._parentGeom instanceof Polygon || this._parentGeom instanceof MultiPolygon;
-	      var computeAllSegments = computeRingSelfNodes$1 || !isRings;
-	      esi.computeIntersections(this._edges, si, computeAllSegments);
-	      this.addSelfIntersectionNodes(this._argIndex);
-	      return si
-	    }
-	  };
-	  GeometryGraph.prototype.computeSplitEdges = function computeSplitEdges (edgelist) {
-	    for (var i = this._edges.iterator(); i.hasNext();) {
-	      var e = i.next();
-	      e.eiList.addSplitEdges(edgelist);
-	    }
-	  };
-	  GeometryGraph.prototype.computeEdgeIntersections = function computeEdgeIntersections (g, li, includeProper) {
-	    var si = new SegmentIntersector$2(li, includeProper, true);
-	    si.setBoundaryNodes(this.getBoundaryNodes(), g.getBoundaryNodes());
-	    var esi = this.createEdgeSetIntersector();
-	    esi.computeIntersections(this._edges, g._edges, si);
-	    return si
-	  };
-	  GeometryGraph.prototype.getGeometry = function getGeometry () {
-	    return this._parentGeom
-	  };
-	  GeometryGraph.prototype.getBoundaryNodeRule = function getBoundaryNodeRule () {
-	    return this._boundaryNodeRule
-	  };
-	  GeometryGraph.prototype.hasTooFewPoints = function hasTooFewPoints () {
-	    return this._hasTooFewPoints
-	  };
-	  GeometryGraph.prototype.addPoint = function addPoint () {
-	    if (arguments[0] instanceof Point$1) {
-	      var p = arguments[0];
-	      var coord = p.getCoordinate();
-	      this.insertPoint(this._argIndex, coord, Location.INTERIOR);
-	    } else if (arguments[0] instanceof Coordinate) {
-	      var pt = arguments[0];
-	      this.insertPoint(this._argIndex, pt, Location.INTERIOR);
-	    }
-	  };
-	  GeometryGraph.prototype.addPolygon = function addPolygon (p) {
-	    var this$1 = this;
-
-	    this.addPolygonRing(p.getExteriorRing(), Location.EXTERIOR, Location.INTERIOR);
-	    for (var i = 0; i < p.getNumInteriorRing(); i++) {
-	      var hole = p.getInteriorRingN(i);
-	      this$1.addPolygonRing(hole, Location.INTERIOR, Location.EXTERIOR);
-	    }
-	  };
-	  GeometryGraph.prototype.addEdge = function addEdge (e) {
-	    this.insertEdge(e);
-	    var coord = e.getCoordinates();
-	    this.insertPoint(this._argIndex, coord[0], Location.BOUNDARY);
-	    this.insertPoint(this._argIndex, coord[coord.length - 1], Location.BOUNDARY);
-	  };
-	  GeometryGraph.prototype.addLineString = function addLineString (line) {
-	    var coord = CoordinateArrays.removeRepeatedPoints(line.getCoordinates());
-	    if (coord.length < 2) {
-	      this._hasTooFewPoints = true;
-	      this._invalidPoint = coord[0];
-	      return null
-	    }
-	    var e = new Edge(coord, new Label(this._argIndex, Location.INTERIOR));
-	    this._lineEdgeMap.put(line, e);
-	    this.insertEdge(e);
-	    Assert.isTrue(coord.length >= 2, 'found LineString with single point');
-	    this.insertBoundaryPoint(this._argIndex, coord[0]);
-	    this.insertBoundaryPoint(this._argIndex, coord[coord.length - 1]);
-	  };
-	  GeometryGraph.prototype.getInvalidPoint = function getInvalidPoint () {
-	    return this._invalidPoint
-	  };
-	  GeometryGraph.prototype.getBoundaryPoints = function getBoundaryPoints () {
-	    var coll = this.getBoundaryNodes();
-	    var pts = new Array(coll.size()).fill(null);
-	    var i = 0;
-	    for (var it = coll.iterator(); it.hasNext();) {
-	      var node = it.next();
-	      pts[i++] = node.getCoordinate().copy();
-	    }
-	    return pts
-	  };
-	  GeometryGraph.prototype.getBoundaryNodes = function getBoundaryNodes () {
-	    if (this._boundaryNodes === null) { this._boundaryNodes = this._nodes.getBoundaryNodes(this._argIndex); }
-	    return this._boundaryNodes
-	  };
-	  GeometryGraph.prototype.addSelfIntersectionNode = function addSelfIntersectionNode (argIndex, coord, loc) {
-	    if (this.isBoundaryNode(argIndex, coord)) { return null }
-	    if (loc === Location.BOUNDARY && this._useBoundaryDeterminationRule) { this.insertBoundaryPoint(argIndex, coord); } else { this.insertPoint(argIndex, coord, loc); }
-	  };
-	  GeometryGraph.prototype.addPolygonRing = function addPolygonRing (lr, cwLeft, cwRight) {
-	    if (lr.isEmpty()) { return null }
-	    var coord = CoordinateArrays.removeRepeatedPoints(lr.getCoordinates());
-	    if (coord.length < 4) {
-	      this._hasTooFewPoints = true;
-	      this._invalidPoint = coord[0];
-	      return null
-	    }
-	    var left = cwLeft;
-	    var right = cwRight;
-	    if (CGAlgorithms.isCCW(coord)) {
-	      left = cwRight;
-	      right = cwLeft;
-	    }
-	    var e = new Edge(coord, new Label(this._argIndex, Location.BOUNDARY, left, right));
-	    this._lineEdgeMap.put(lr, e);
-	    this.insertEdge(e);
-	    this.insertPoint(this._argIndex, coord[0], Location.BOUNDARY);
-	  };
-	  GeometryGraph.prototype.insertPoint = function insertPoint (argIndex, coord, onLocation) {
-	    var n = this._nodes.addNode(coord);
-	    var lbl = n.getLabel();
-	    if (lbl === null) {
-	      n._label = new Label(argIndex, onLocation);
-	    } else { lbl.setLocation(argIndex, onLocation); }
-	  };
-	  GeometryGraph.prototype.createEdgeSetIntersector = function createEdgeSetIntersector () {
-	    return new SimpleMCSweepLineIntersector()
-	  };
-	  GeometryGraph.prototype.addSelfIntersectionNodes = function addSelfIntersectionNodes (argIndex) {
-	    var this$1 = this;
-
-	    for (var i = this._edges.iterator(); i.hasNext();) {
-	      var e = i.next();
-	      var eLoc = e.getLabel().getLocation(argIndex);
-	      for (var eiIt = e.eiList.iterator(); eiIt.hasNext();) {
-	        var ei = eiIt.next();
-	        this$1.addSelfIntersectionNode(argIndex, ei.coord, eLoc);
-	      }
-	    }
-	  };
-	  GeometryGraph.prototype.add = function add () {
-	    if (arguments.length === 1) {
-	      var g = arguments[0];
-	      if (g.isEmpty()) { return null }
-	      if (g instanceof MultiPolygon) { this._useBoundaryDeterminationRule = false; }
-	      if (g instanceof Polygon) { this.addPolygon(g); }
-	      else if (g instanceof LineString) { this.addLineString(g); }
-	      else if (g instanceof Point$1) { this.addPoint(g); }
-	      else if (g instanceof MultiPoint) { this.addCollection(g); }
-	      else if (g instanceof MultiLineString) { this.addCollection(g); }
-	      else if (g instanceof MultiPolygon) { this.addCollection(g); }
-	      else if (g instanceof GeometryCollection) { this.addCollection(g); }
-	      else { throw new Error(g.getClass().getName()) }
-	    } else { return PlanarGraph$$1.prototype.add.apply(this, arguments) }
-	  };
-	  GeometryGraph.prototype.addCollection = function addCollection (gc) {
-	    var this$1 = this;
-
-	    for (var i = 0; i < gc.getNumGeometries(); i++) {
-	      var g = gc.getGeometryN(i);
-	      this$1.add(g);
-	    }
-	  };
-	  GeometryGraph.prototype.locate = function locate (pt) {
-	    if (hasInterface(this._parentGeom, Polygonal) && this._parentGeom.getNumGeometries() > 50) {
-	      if (this._areaPtLocator === null) {
-	        this._areaPtLocator = new IndexedPointInAreaLocator(this._parentGeom);
-	      }
-	      return this._areaPtLocator.locate(pt)
-	    }
-	    return this._ptLocator.locate(pt, this._parentGeom)
-	  };
-	  GeometryGraph.prototype.findEdge = function findEdge () {
-	    if (arguments.length === 1) {
-	      var line = arguments[0];
-	      return this._lineEdgeMap.get(line)
-	    } else { return PlanarGraph$$1.prototype.findEdge.apply(this, arguments) }
-	  };
-	  GeometryGraph.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  GeometryGraph.prototype.getClass = function getClass () {
-	    return GeometryGraph
-	  };
-	  GeometryGraph.determineBoundary = function determineBoundary (boundaryNodeRule, boundaryCount) {
-	    return boundaryNodeRule.isInBoundary(boundaryCount) ? Location.BOUNDARY : Location.INTERIOR
-	  };
-
-	  return GeometryGraph;
-	}(PlanarGraph));
-
-	var GeometryGraphOp = function GeometryGraphOp () {
-	  this._li = new RobustLineIntersector();
-	  this._resultPrecisionModel = null;
-	  this._arg = null;
-	  if (arguments.length === 1) {
-	    var g0 = arguments[0];
-	    this.setComputationPrecision(g0.getPrecisionModel());
-	    this._arg = new Array(1).fill(null);
-	    this._arg[0] = new GeometryGraph(0, g0);
-	  } else if (arguments.length === 2) {
-	    var g0$1 = arguments[0];
-	    var g1 = arguments[1];
-	    var boundaryNodeRule = BoundaryNodeRule.OGC_SFS_BOUNDARY_RULE;
-	    if (g0$1.getPrecisionModel().compareTo(g1.getPrecisionModel()) >= 0) { this.setComputationPrecision(g0$1.getPrecisionModel()); } else { this.setComputationPrecision(g1.getPrecisionModel()); }
-	    this._arg = new Array(2).fill(null);
-	    this._arg[0] = new GeometryGraph(0, g0$1, boundaryNodeRule);
-	    this._arg[1] = new GeometryGraph(1, g1, boundaryNodeRule);
-	  } else if (arguments.length === 3) {
-	    var g0$2 = arguments[0];
-	    var g1$1 = arguments[1];
-	    var boundaryNodeRule$1 = arguments[2];
-	    if (g0$2.getPrecisionModel().compareTo(g1$1.getPrecisionModel()) >= 0) { this.setComputationPrecision(g0$2.getPrecisionModel()); } else { this.setComputationPrecision(g1$1.getPrecisionModel()); }
-	    this._arg = new Array(2).fill(null);
-	    this._arg[0] = new GeometryGraph(0, g0$2, boundaryNodeRule$1);
-	    this._arg[1] = new GeometryGraph(1, g1$1, boundaryNodeRule$1);
+	function write$1(key, data) {
+	  return sessionStorage().setItem(key, data);
+	}
+
+	function each$1(fn) {
+	  for (var i = sessionStorage().length - 1; i >= 0; i--) {
+	    var key = sessionStorage().key(i);
+	    fn(read$1(key), key);
 	  }
-	};
-	GeometryGraphOp.prototype.getArgGeometry = function getArgGeometry (i) {
-	  return this._arg[i].getGeometry()
-	};
-	GeometryGraphOp.prototype.setComputationPrecision = function setComputationPrecision (pm) {
-	  this._resultPrecisionModel = pm;
-	  this._li.setPrecisionModel(this._resultPrecisionModel);
-	};
-	GeometryGraphOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryGraphOp.prototype.getClass = function getClass () {
-	  return GeometryGraphOp
-	};
+	}
 
-	// operation.geometrygraph
+	function remove$1(key) {
+	  return sessionStorage().removeItem(key);
+	}
 
-	var GeometryMapper = function GeometryMapper () {};
+	function clearAll$1() {
+	  return sessionStorage().clear();
+	}
 
-	GeometryMapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryMapper.prototype.getClass = function getClass () {
-	  return GeometryMapper
-	};
-	GeometryMapper.map = function map () {
-	  if (arguments[0] instanceof Geometry && hasInterface(arguments[1], GeometryMapper.MapOp)) {
-	    var geom = arguments[0];
-	    var op = arguments[1];
-	    var mapped = new ArrayList();
-	    for (var i = 0; i < geom.getNumGeometries(); i++) {
-	      var g = op.map(geom.getGeometryN(i));
-	      if (g !== null) { mapped.add(g); }
-	    }
-	    return geom.getFactory().buildGeometry(mapped)
-	  } else if (hasInterface(arguments[0], Collection) && hasInterface(arguments[1], GeometryMapper.MapOp)) {
-	    var geoms = arguments[0];
-	    var op$1 = arguments[1];
-	    var mapped$1 = new ArrayList();
-	    for (var i$1 = geoms.iterator(); i$1.hasNext();) {
-	      var g$1 = i$1.next();
-	      var gr = op$1.map(g$1);
-	      if (gr !== null) { mapped$1.add(gr); }
-	    }
-	    return mapped$1
-	  }
+	// is functions (meaning store.get(), store.set(), etc will all function).
+	// However, stored values will not persist when the browser navigates to
+	// a new page or reloads the current page.
+
+	var memoryStorage_1 = {
+	  name: 'memoryStorage',
+	  read: read,
+	  write: write,
+	  each: each,
+	  remove: remove,
+	  clearAll: clearAll
 	};
-	GeometryMapper.MapOp = function MapOp () {};
-
-	var OverlayOp = (function (GeometryGraphOp) {
-	  function OverlayOp () {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    GeometryGraphOp.call(this, g0, g1);
-	    this._ptLocator = new PointLocator();
-	    this._geomFact = null;
-	    this._resultGeom = null;
-	    this._graph = null;
-	    this._edgeList = new EdgeList();
-	    this._resultPolyList = new ArrayList();
-	    this._resultLineList = new ArrayList();
-	    this._resultPointList = new ArrayList();
-	    this._graph = new PlanarGraph(new OverlayNodeFactory());
-	    this._geomFact = g0.getFactory();
-	  }
-
-	  if ( GeometryGraphOp ) { OverlayOp.__proto__ = GeometryGraphOp; }
-	  OverlayOp.prototype = Object.create( GeometryGraphOp && GeometryGraphOp.prototype );
-	  OverlayOp.prototype.constructor = OverlayOp;
-	  OverlayOp.prototype.insertUniqueEdge = function insertUniqueEdge (e) {
-	    var existingEdge = this._edgeList.findEqualEdge(e);
-	    if (existingEdge !== null) {
-	      var existingLabel = existingEdge.getLabel();
-	      var labelToMerge = e.getLabel();
-	      if (!existingEdge.isPointwiseEqual(e)) {
-	        labelToMerge = new Label(e.getLabel());
-	        labelToMerge.flip();
-	      }
-	      var depth = existingEdge.getDepth();
-	      if (depth.isNull()) {
-	        depth.add(existingLabel);
-	      }
-	      depth.add(labelToMerge);
-	      existingLabel.merge(labelToMerge);
-	    } else {
-	      this._edgeList.add(e);
-	    }
-	  };
-	  OverlayOp.prototype.getGraph = function getGraph () {
-	    return this._graph
-	  };
-	  OverlayOp.prototype.cancelDuplicateResultEdges = function cancelDuplicateResultEdges () {
-	    for (var it = this._graph.getEdgeEnds().iterator(); it.hasNext();) {
-	      var de = it.next();
-	      var sym = de.getSym();
-	      if (de.isInResult() && sym.isInResult()) {
-	        de.setInResult(false);
-	        sym.setInResult(false);
-	      }
-	    }
-	  };
-	  OverlayOp.prototype.isCoveredByLA = function isCoveredByLA (coord) {
-	    if (this.isCovered(coord, this._resultLineList)) { return true }
-	    if (this.isCovered(coord, this._resultPolyList)) { return true }
-	    return false
-	  };
-	  OverlayOp.prototype.computeGeometry = function computeGeometry (resultPointList, resultLineList, resultPolyList, opcode) {
-	    var geomList = new ArrayList();
-	    geomList.addAll(resultPointList);
-	    geomList.addAll(resultLineList);
-	    geomList.addAll(resultPolyList);
-	    if (geomList.isEmpty()) { return OverlayOp.createEmptyResult(opcode, this._arg[0].getGeometry(), this._arg[1].getGeometry(), this._geomFact) }
-	    return this._geomFact.buildGeometry(geomList)
-	  };
-	  OverlayOp.prototype.mergeSymLabels = function mergeSymLabels () {
-	    for (var nodeit = this._graph.getNodes().iterator(); nodeit.hasNext();) {
-	      var node = nodeit.next();
-	      node.getEdges().mergeSymLabels();
-	    }
-	  };
-	  OverlayOp.prototype.isCovered = function isCovered (coord, geomList) {
-	    var this$1 = this;
-
-	    for (var it = geomList.iterator(); it.hasNext();) {
-	      var geom = it.next();
-	      var loc = this$1._ptLocator.locate(coord, geom);
-	      if (loc !== Location.EXTERIOR) { return true }
-	    }
-	    return false
-	  };
-	  OverlayOp.prototype.replaceCollapsedEdges = function replaceCollapsedEdges () {
-	    var newEdges = new ArrayList();
-	    for (var it = this._edgeList.iterator(); it.hasNext();) {
-	      var e = it.next();
-	      if (e.isCollapsed()) {
-	        it.remove();
-	        newEdges.add(e.getCollapsedEdge());
-	      }
-	    }
-	    this._edgeList.addAll(newEdges);
-	  };
-	  OverlayOp.prototype.updateNodeLabelling = function updateNodeLabelling () {
-	    for (var nodeit = this._graph.getNodes().iterator(); nodeit.hasNext();) {
-	      var node = nodeit.next();
-	      var lbl = node.getEdges().getLabel();
-	      node.getLabel().merge(lbl);
-	    }
-	  };
-	  OverlayOp.prototype.getResultGeometry = function getResultGeometry (overlayOpCode) {
-	    this.computeOverlay(overlayOpCode);
-	    return this._resultGeom
-	  };
-	  OverlayOp.prototype.insertUniqueEdges = function insertUniqueEdges (edges) {
-	    var this$1 = this;
-
-	    for (var i = edges.iterator(); i.hasNext();) {
-	      var e = i.next();
-	      this$1.insertUniqueEdge(e);
-	    }
-	  };
-	  OverlayOp.prototype.computeOverlay = function computeOverlay (opCode) {
-	    this.copyPoints(0);
-	    this.copyPoints(1);
-	    this._arg[0].computeSelfNodes(this._li, false);
-	    this._arg[1].computeSelfNodes(this._li, false);
-	    this._arg[0].computeEdgeIntersections(this._arg[1], this._li, true);
-	    var baseSplitEdges = new ArrayList();
-	    this._arg[0].computeSplitEdges(baseSplitEdges);
-	    this._arg[1].computeSplitEdges(baseSplitEdges);
-	    // const splitEdges = baseSplitEdges
-	    this.insertUniqueEdges(baseSplitEdges);
-	    this.computeLabelsFromDepths();
-	    this.replaceCollapsedEdges();
-	    EdgeNodingValidator.checkValid(this._edgeList.getEdges());
-	    this._graph.addEdges(this._edgeList.getEdges());
-	    this.computeLabelling();
-	    this.labelIncompleteNodes();
-	    this.findResultAreaEdges(opCode);
-	    this.cancelDuplicateResultEdges();
-	    var polyBuilder = new PolygonBuilder(this._geomFact);
-	    polyBuilder.add(this._graph);
-	    this._resultPolyList = polyBuilder.getPolygons();
-	    var lineBuilder = new LineBuilder(this, this._geomFact, this._ptLocator);
-	    this._resultLineList = lineBuilder.build(opCode);
-	    var pointBuilder = new PointBuilder(this, this._geomFact, this._ptLocator);
-	    this._resultPointList = pointBuilder.build(opCode);
-	    this._resultGeom = this.computeGeometry(this._resultPointList, this._resultLineList, this._resultPolyList, opCode);
-	  };
-	  OverlayOp.prototype.labelIncompleteNode = function labelIncompleteNode (n, targetIndex) {
-	    var loc = this._ptLocator.locate(n.getCoordinate(), this._arg[targetIndex].getGeometry());
-	    n.getLabel().setLocation(targetIndex, loc);
-	  };
-	  OverlayOp.prototype.copyPoints = function copyPoints (argIndex) {
-	    var this$1 = this;
-
-	    for (var i = this._arg[argIndex].getNodeIterator(); i.hasNext();) {
-	      var graphNode = i.next();
-	      var newNode = this$1._graph.addNode(graphNode.getCoordinate());
-	      newNode.setLabel(argIndex, graphNode.getLabel().getLocation(argIndex));
-	    }
-	  };
-	  OverlayOp.prototype.findResultAreaEdges = function findResultAreaEdges (opCode) {
-	    for (var it = this._graph.getEdgeEnds().iterator(); it.hasNext();) {
-	      var de = it.next();
-	      var label = de.getLabel();
-	      if (label.isArea() && !de.isInteriorAreaEdge() && OverlayOp.isResultOfOp(label.getLocation(0, Position.RIGHT), label.getLocation(1, Position.RIGHT), opCode)) {
-	        de.setInResult(true);
-	      }
-	    }
-	  };
-	  OverlayOp.prototype.computeLabelsFromDepths = function computeLabelsFromDepths () {
-	    for (var it = this._edgeList.iterator(); it.hasNext();) {
-	      var e = it.next();
-	      var lbl = e.getLabel();
-	      var depth = e.getDepth();
-	      if (!depth.isNull()) {
-	        depth.normalize();
-	        for (var i = 0; i < 2; i++) {
-	          if (!lbl.isNull(i) && lbl.isArea() && !depth.isNull(i)) {
-	            if (depth.getDelta(i) === 0) {
-	              lbl.toLine(i);
-	            } else {
-	              Assert.isTrue(!depth.isNull(i, Position.LEFT), 'depth of LEFT side has not been initialized');
-	              lbl.setLocation(i, Position.LEFT, depth.getLocation(i, Position.LEFT));
-	              Assert.isTrue(!depth.isNull(i, Position.RIGHT), 'depth of RIGHT side has not been initialized');
-	              lbl.setLocation(i, Position.RIGHT, depth.getLocation(i, Position.RIGHT));
-	            }
-	          }
-	        }
-	      }
-	    }
-	  };
-	  OverlayOp.prototype.computeLabelling = function computeLabelling () {
-	    var this$1 = this;
+	var memoryStorage = {};
 
-	    for (var nodeit = this._graph.getNodes().iterator(); nodeit.hasNext();) {
-	      var node = nodeit.next();
-	      node.getEdges().computeLabelling(this$1._arg);
-	    }
-	    this.mergeSymLabels();
-	    this.updateNodeLabelling();
-	  };
-	  OverlayOp.prototype.labelIncompleteNodes = function labelIncompleteNodes () {
-	    var this$1 = this;
+	function read(key) {
+	  return memoryStorage[key];
+	}
 
-	    // let nodeCount = 0
-	    for (var ni = this._graph.getNodes().iterator(); ni.hasNext();) {
-	      var n = ni.next();
-	      var label = n.getLabel();
-	      if (n.isIsolated()) {
-	        // nodeCount++
-	        if (label.isNull(0)) { this$1.labelIncompleteNode(n, 0); } else { this$1.labelIncompleteNode(n, 1); }
-	      }
-	      n.getEdges().updateLabelling(label);
+	function write(key, data) {
+	  memoryStorage[key] = data;
+	}
+
+	function each(callback) {
+	  for (var key in memoryStorage) {
+	    if (memoryStorage.hasOwnProperty(key)) {
+	      callback(memoryStorage[key], key);
 	    }
-	  };
-	  OverlayOp.prototype.isCoveredByA = function isCoveredByA (coord) {
-	    if (this.isCovered(coord, this._resultPolyList)) { return true }
-	    return false
-	  };
-	  OverlayOp.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  OverlayOp.prototype.getClass = function getClass () {
-	    return OverlayOp
-	  };
+	  }
+	}
 
-	  return OverlayOp;
-	}(GeometryGraphOp));
+	function remove(key) {
+	  delete memoryStorage[key];
+	}
 
-	OverlayOp.overlayOp = function (geom0, geom1, opCode) {
-	  var gov = new OverlayOp(geom0, geom1);
-	  var geomOv = gov.getResultGeometry(opCode);
-	  return geomOv
-	};
-	OverlayOp.intersection = function (g, other) {
-	  if (g.isEmpty() || other.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.INTERSECTION, g, other, g.getFactory()) }
-	  if (g.isGeometryCollection()) {
-	    var g2 = other;
-	    return GeometryCollectionMapper.map(g, {
-	      interfaces_: function () {
-	        return [GeometryMapper.MapOp]
-	      },
-	      map: function (g) {
-	        return g.intersection(g2)
-	      }
-	    })
-	  }
-	  g.checkNotGeometryCollection(g);
-	  g.checkNotGeometryCollection(other);
-	  return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.INTERSECTION)
-	};
-	OverlayOp.symDifference = function (g, other) {
-	  if (g.isEmpty() || other.isEmpty()) {
-	    if (g.isEmpty() && other.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.SYMDIFFERENCE, g, other, g.getFactory()) }
-	    if (g.isEmpty()) { return other.copy() }
-	    if (other.isEmpty()) { return g.copy() }
-	  }
-	  g.checkNotGeometryCollection(g);
-	  g.checkNotGeometryCollection(other);
-	  return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.SYMDIFFERENCE)
-	};
-	OverlayOp.resultDimension = function (opCode, g0, g1) {
-	  var dim0 = g0.getDimension();
-	  var dim1 = g1.getDimension();
-	  var resultDimension = -1;
-	  switch (opCode) {
-	    case OverlayOp.INTERSECTION:
-	      resultDimension = Math.min(dim0, dim1);
-	      break
-	    case OverlayOp.UNION:
-	      resultDimension = Math.max(dim0, dim1);
-	      break
-	    case OverlayOp.DIFFERENCE:
-	      resultDimension = dim0;
-	      break
-	    case OverlayOp.SYMDIFFERENCE:
-	      resultDimension = Math.max(dim0, dim1);
-	      break
-	  }
-	  return resultDimension
-	};
-	OverlayOp.createEmptyResult = function (overlayOpCode, a, b, geomFact) {
-	  var result = null;
-	  switch (OverlayOp.resultDimension(overlayOpCode, a, b)) {
-	    case -1:
-	      result = geomFact.createGeometryCollection(new Array(0).fill(null));
-	      break
-	    case 0:
-	      result = geomFact.createPoint();
-	      break
-	    case 1:
-	      result = geomFact.createLineString();
-	      break
-	    case 2:
-	      result = geomFact.createPolygon();
-	      break
-	  }
-	  return result
-	};
-	OverlayOp.difference = function (g, other) {
-	  if (g.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.DIFFERENCE, g, other, g.getFactory()) }
-	  if (other.isEmpty()) { return g.copy() }
-	  g.checkNotGeometryCollection(g);
-	  g.checkNotGeometryCollection(other);
-	  return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.DIFFERENCE)
-	};
-	OverlayOp.isResultOfOp = function () {
-	  if (arguments.length === 2) {
-	    var label = arguments[0];
-	    var opCode = arguments[1];
-	    var loc0 = label.getLocation(0);
-	    var loc1 = label.getLocation(1);
-	    return OverlayOp.isResultOfOp(loc0, loc1, opCode)
-	  } else if (arguments.length === 3) {
-	    var loc0$1 = arguments[0];
-	    var loc1$1 = arguments[1];
-	    var overlayOpCode = arguments[2];
-	    if (loc0$1 === Location.BOUNDARY) { loc0$1 = Location.INTERIOR; }
-	    if (loc1$1 === Location.BOUNDARY) { loc1$1 = Location.INTERIOR; }
-	    switch (overlayOpCode) {
-	      case OverlayOp.INTERSECTION:
-	        return loc0$1 === Location.INTERIOR && loc1$1 === Location.INTERIOR
-	      case OverlayOp.UNION:
-	        return loc0$1 === Location.INTERIOR || loc1$1 === Location.INTERIOR
-	      case OverlayOp.DIFFERENCE:
-	        return loc0$1 === Location.INTERIOR && loc1$1 !== Location.INTERIOR
-	      case OverlayOp.SYMDIFFERENCE:
-	        return (loc0$1 === Location.INTERIOR && loc1$1 !== Location.INTERIOR) || (loc0$1 !== Location.INTERIOR && loc1$1 === Location.INTERIOR)
-	    }
-	    return false
-	  }
-	};
-	OverlayOp.INTERSECTION = 1;
-	OverlayOp.UNION = 2;
-	OverlayOp.DIFFERENCE = 3;
-	OverlayOp.SYMDIFFERENCE = 4;
-
-	var FuzzyPointLocator = function FuzzyPointLocator () {
-	  this._g = null;
-	  this._boundaryDistanceTolerance = null;
-	  this._linework = null;
-	  this._ptLocator = new PointLocator();
-	  this._seg = new LineSegment();
-	  var g = arguments[0];
-	  var boundaryDistanceTolerance = arguments[1];
-	  this._g = g;
-	  this._boundaryDistanceTolerance = boundaryDistanceTolerance;
-	  this._linework = this.extractLinework(g);
-	};
-	FuzzyPointLocator.prototype.isWithinToleranceOfBoundary = function isWithinToleranceOfBoundary (pt) {
-	    var this$1 = this;
+	function clearAll(key) {
+	  memoryStorage = {};
+	}
 
-	  for (var i = 0; i < this._linework.getNumGeometries(); i++) {
-	    var line = this$1._linework.getGeometryN(i);
-	    var seq = line.getCoordinateSequence();
-	    for (var j = 0; j < seq.size() - 1; j++) {
-	      seq.getCoordinate(j, this$1._seg.p0);
-	      seq.getCoordinate(j + 1, this$1._seg.p1);
-	      var dist = this$1._seg.distance(pt);
-	      if (dist <= this$1._boundaryDistanceTolerance) { return true }
-	    }
-	  }
-	  return false
-	};
-	FuzzyPointLocator.prototype.getLocation = function getLocation (pt) {
-	  if (this.isWithinToleranceOfBoundary(pt)) { return Location.BOUNDARY }
-	  return this._ptLocator.locate(pt, this._g)
-	};
-	FuzzyPointLocator.prototype.extractLinework = function extractLinework (g) {
-	  var extracter = new PolygonalLineworkExtracter();
-	  g.apply(extracter);
-	  var linework = extracter.getLinework();
-	  var lines = GeometryFactory.toLineStringArray(linework);
-	  return g.getFactory().createMultiLineString(lines)
-	};
-	FuzzyPointLocator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	FuzzyPointLocator.prototype.getClass = function getClass () {
-	  return FuzzyPointLocator
-	};
+	var all = [// Listed in order of usage preference
+	localStorage_1, oldFFGlobalStorage, oldIEUserDataStorage, cookieStorage, sessionStorage_1, memoryStorage_1];
 
-	var PolygonalLineworkExtracter = function PolygonalLineworkExtracter () {
-	  this._linework = null;
-	  this._linework = new ArrayList();
-	};
-	PolygonalLineworkExtracter.prototype.getLinework = function getLinework () {
-	  return this._linework
-	};
-	PolygonalLineworkExtracter.prototype.filter = function filter (g) {
-	    var this$1 = this;
+	/* eslint-disable */
+	//  json2.js
+	//  2016-10-28
+	//  Public Domain.
+	//  NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
+	//  See http://www.JSON.org/js.html
+	//  This code should be minified before deployment.
+	//  See http://javascript.crockford.com/jsmin.html
+	//  USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
+	//  NOT CONTROL.
+	//  This file creates a global JSON object containing two methods: stringify
+	//  and parse. This file provides the ES5 JSON capability to ES3 systems.
+	//  If a project might run on IE8 or earlier, then this file should be included.
+	//  This file does nothing on ES5 systems.
+	//      JSON.stringify(value, replacer, space)
+	//          value       any JavaScript value, usually an object or array.
+	//          replacer    an optional parameter that determines how object
+	//                      values are stringified for objects. It can be a
+	//                      function or an array of strings.
+	//          space       an optional parameter that specifies the indentation
+	//                      of nested structures. If it is omitted, the text will
+	//                      be packed without extra whitespace. If it is a number,
+	//                      it will specify the number of spaces to indent at each
+	//                      level. If it is a string (such as "\t" or "&nbsp;"),
+	//                      it contains the characters used to indent at each level.
+	//          This method produces a JSON text from a JavaScript value.
+	//          When an object value is found, if the object contains a toJSON
+	//          method, its toJSON method will be called and the result will be
+	//          stringified. A toJSON method does not serialize: it returns the
+	//          value represented by the name/value pair that should be serialized,
+	//          or undefined if nothing should be serialized. The toJSON method
+	//          will be passed the key associated with the value, and this will be
+	//          bound to the value.
+	//          For example, this would serialize Dates as ISO strings.
+	//              Date.prototype.toJSON = function (key) {
+	//                  function f(n) {
+	//                      // Format integers to have at least two digits.
+	//                      return (n < 10)
+	//                          ? "0" + n
+	//                          : n;
+	//                  }
+	//                  return this.getUTCFullYear()   + "-" +
+	//                       f(this.getUTCMonth() + 1) + "-" +
+	//                       f(this.getUTCDate())      + "T" +
+	//                       f(this.getUTCHours())     + ":" +
+	//                       f(this.getUTCMinutes())   + ":" +
+	//                       f(this.getUTCSeconds())   + "Z";
+	//              };
+	//          You can provide an optional replacer method. It will be passed the
+	//          key and value of each member, with this bound to the containing
+	//          object. The value that is returned from your method will be
+	//          serialized. If your method returns undefined, then the member will
+	//          be excluded from the serialization.
+	//          If the replacer parameter is an array of strings, then it will be
+	//          used to select the members to be serialized. It filters the results
+	//          such that only members with keys listed in the replacer array are
+	//          stringified.
+	//          Values that do not have JSON representations, such as undefined or
+	//          functions, will not be serialized. Such values in objects will be
+	//          dropped; in arrays they will be replaced with null. You can use
+	//          a replacer function to replace those with JSON values.
+	//          JSON.stringify(undefined) returns undefined.
+	//          The optional space parameter produces a stringification of the
+	//          value that is filled with line breaks and indentation to make it
+	//          easier to read.
+	//          If the space parameter is a non-empty string, then that string will
+	//          be used for indentation. If the space parameter is a number, then
+	//          the indentation will be that many spaces.
+	//          Example:
+	//          text = JSON.stringify(["e", {pluribus: "unum"}]);
+	//          // text is '["e",{"pluribus":"unum"}]'
+	//          text = JSON.stringify(["e", {pluribus: "unum"}], null, "\t");
+	//          // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
+	//          text = JSON.stringify([new Date()], function (key, value) {
+	//              return this[key] instanceof Date
+	//                  ? "Date(" + this[key] + ")"
+	//                  : value;
+	//          });
+	//          // text is '["Date(---current time---)"]'
+	//      JSON.parse(text, reviver)
+	//          This method parses a JSON text to produce an object or array.
+	//          It can throw a SyntaxError exception.
+	//          The optional reviver parameter is a function that can filter and
+	//          transform the results. It receives each of the keys and values,
+	//          and its return value is used instead of the original value.
+	//          If it returns what it received, then the structure is not modified.
+	//          If it returns undefined then the member is deleted.
+	//          Example:
+	//          // Parse the text. Values that look like ISO date strings will
+	//          // be converted to Date objects.
+	//          myData = JSON.parse(text, function (key, value) {
+	//              var a;
+	//              if (typeof value === "string") {
+	//                  a =
+	//   /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
+	//                  if (a) {
+	//                      return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
+	//                          +a[5], +a[6]));
+	//                  }
+	//              }
+	//              return value;
+	//          });
+	//          myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
+	//              var d;
+	//              if (typeof value === "string" &&
+	//                      value.slice(0, 5) === "Date(" &&
+	//                      value.slice(-1) === ")") {
+	//                  d = new Date(value.slice(5, -1));
+	//                  if (d) {
+	//                      return d;
+	//                  }
+	//              }
+	//              return value;
+	//          });
+	//  This is a reference implementation. You are free to copy, modify, or
+	//  redistribute.
 
-	  if (g instanceof Polygon) {
-	    var poly = g;
-	    this._linework.add(poly.getExteriorRing());
-	    for (var i = 0; i < poly.getNumInteriorRing(); i++) {
-	      this$1._linework.add(poly.getInteriorRingN(i));
-	    }
-	  }
-	};
-	PolygonalLineworkExtracter.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryFilter]
-	};
-	PolygonalLineworkExtracter.prototype.getClass = function getClass () {
-	  return PolygonalLineworkExtracter
-	};
+	/*jslint
+	    eval, for, this
+	*/
+
+	/*property
+	    JSON, apply, call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
+	    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
+	    lastIndex, length, parse, prototype, push, replace, slice, stringify,
+	    test, toJSON, toString, valueOf
+	*/
+	// Create a JSON object only if one does not already exist. We create the
+	// methods in a closure to avoid creating global variables.
+	if ((typeof JSON === "undefined" ? "undefined" : _typeof(JSON)) !== "object") {
+	  JSON = {};
+	}
 
-	var OffsetPointGenerator = function OffsetPointGenerator () {
-	  this._g = null;
-	  this._doLeft = true;
-	  this._doRight = true;
-	  var g = arguments[0];
-	  this._g = g;
-	};
-	OffsetPointGenerator.prototype.extractPoints = function extractPoints (line, offsetDistance, offsetPts) {
-	    var this$1 = this;
+	(function () {
 
-	  var pts = line.getCoordinates();
-	  for (var i = 0; i < pts.length - 1; i++) {
-	    this$1.computeOffsetPoints(pts[i], pts[i + 1], offsetDistance, offsetPts);
-	  }
-	};
-	OffsetPointGenerator.prototype.setSidesToGenerate = function setSidesToGenerate (doLeft, doRight) {
-	  this._doLeft = doLeft;
-	  this._doRight = doRight;
-	};
-	OffsetPointGenerator.prototype.getPoints = function getPoints (offsetDistance) {
-	    var this$1 = this;
+	  var rx_one = /^[\],:{}\s]*$/;
+	  var rx_two = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
+	  var rx_three = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
+	  var rx_four = /(?:^|:|,)(?:\s*\[)+/g;
+	  var rx_escapable = /[\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+	  var rx_dangerous = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
 
-	  var offsetPts = new ArrayList();
-	  var lines = LinearComponentExtracter.getLines(this._g);
-	  for (var i = lines.iterator(); i.hasNext();) {
-	    var line = i.next();
-	    this$1.extractPoints(line, offsetDistance, offsetPts);
-	  }
-	  return offsetPts
-	};
-	OffsetPointGenerator.prototype.computeOffsetPoints = function computeOffsetPoints (p0, p1, offsetDistance, offsetPts) {
-	  var dx = p1.x - p0.x;
-	  var dy = p1.y - p0.y;
-	  var len = Math.sqrt(dx * dx + dy * dy);
-	  var ux = offsetDistance * dx / len;
-	  var uy = offsetDistance * dy / len;
-	  var midX = (p1.x + p0.x) / 2;
-	  var midY = (p1.y + p0.y) / 2;
-	  if (this._doLeft) {
-	    var offsetLeft = new Coordinate(midX - uy, midY + ux);
-	    offsetPts.add(offsetLeft);
-	  }
-	  if (this._doRight) {
-	    var offsetRight = new Coordinate(midX + uy, midY - ux);
-	    offsetPts.add(offsetRight);
+	  function f(n) {
+	    // Format integers to have at least two digits.
+	    return n < 10 ? "0" + n : n;
 	  }
-	};
-	OffsetPointGenerator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetPointGenerator.prototype.getClass = function getClass () {
-	  return OffsetPointGenerator
-	};
 
-	var OverlayResultValidator = function OverlayResultValidator () {
-	  this._geom = null;
-	  this._locFinder = null;
-	  this._location = new Array(3).fill(null);
-	  this._invalidLocation = null;
-	  this._boundaryDistanceTolerance = OverlayResultValidator.TOLERANCE;
-	  this._testCoords = new ArrayList();
-	  var a = arguments[0];
-	  var b = arguments[1];
-	  var result = arguments[2];
-	  this._boundaryDistanceTolerance = OverlayResultValidator.computeBoundaryDistanceTolerance(a, b);
-	  this._geom = [a, b, result];
-	  this._locFinder = [new FuzzyPointLocator(this._geom[0], this._boundaryDistanceTolerance), new FuzzyPointLocator(this._geom[1], this._boundaryDistanceTolerance), new FuzzyPointLocator(this._geom[2], this._boundaryDistanceTolerance)];
-	};
+	  function this_value() {
+	    return this.valueOf();
+	  }
 
-	var staticAccessors$46 = { TOLERANCE: { configurable: true } };
-	OverlayResultValidator.prototype.reportResult = function reportResult (overlayOp, location, expectedInterior) {
-	  System.out.println('Overlay result invalid - A:' + Location.toLocationSymbol(location[0]) + ' B:' + Location.toLocationSymbol(location[1]) + ' expected:' + (expectedInterior ? 'i' : 'e') + ' actual:' + Location.toLocationSymbol(location[2]));
-	};
-	OverlayResultValidator.prototype.isValid = function isValid (overlayOp) {
-	  this.addTestPts(this._geom[0]);
-	  this.addTestPts(this._geom[1]);
-	  var isValid = this.checkValid(overlayOp);
-	  return isValid
-	};
-	OverlayResultValidator.prototype.checkValid = function checkValid () {
-	    var this$1 = this;
+	  if (typeof Date.prototype.toJSON !== "function") {
+	    Date.prototype.toJSON = function () {
+	      return isFinite(this.valueOf()) ? this.getUTCFullYear() + "-" + f(this.getUTCMonth() + 1) + "-" + f(this.getUTCDate()) + "T" + f(this.getUTCHours()) + ":" + f(this.getUTCMinutes()) + ":" + f(this.getUTCSeconds()) + "Z" : null;
+	    };
 
-	  if (arguments.length === 1) {
-	    var overlayOp = arguments[0];
-	    for (var i = 0; i < this._testCoords.size(); i++) {
-	      var pt = this$1._testCoords.get(i);
-	      if (!this$1.checkValid(overlayOp, pt)) {
-	        this$1._invalidLocation = pt;
-	        return false
-	      }
-	    }
-	    return true
-	  } else if (arguments.length === 2) {
-	    var overlayOp$1 = arguments[0];
-	    var pt$1 = arguments[1];
-	    this._location[0] = this._locFinder[0].getLocation(pt$1);
-	    this._location[1] = this._locFinder[1].getLocation(pt$1);
-	    this._location[2] = this._locFinder[2].getLocation(pt$1);
-	    if (OverlayResultValidator.hasLocation(this._location, Location.BOUNDARY)) { return true }
-	    return this.isValidResult(overlayOp$1, this._location)
+	    Boolean.prototype.toJSON = this_value;
+	    Number.prototype.toJSON = this_value;
+	    String.prototype.toJSON = this_value;
 	  }
-	};
-	OverlayResultValidator.prototype.addTestPts = function addTestPts (g) {
-	  var ptGen = new OffsetPointGenerator(g);
-	  this._testCoords.addAll(ptGen.getPoints(5 * this._boundaryDistanceTolerance));
-	};
-	OverlayResultValidator.prototype.isValidResult = function isValidResult (overlayOp, location) {
-	  var expectedInterior = OverlayOp.isResultOfOp(location[0], location[1], overlayOp);
-	  var resultInInterior = location[2] === Location.INTERIOR;
-	  var isValid = !(expectedInterior ^ resultInInterior);
-	  if (!isValid) { this.reportResult(overlayOp, location, expectedInterior); }
-	  return isValid
-	};
-	OverlayResultValidator.prototype.getInvalidLocation = function getInvalidLocation () {
-	  return this._invalidLocation
-	};
-	OverlayResultValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OverlayResultValidator.prototype.getClass = function getClass () {
-	  return OverlayResultValidator
-	};
-	OverlayResultValidator.hasLocation = function hasLocation (location, loc) {
-	  for (var i = 0; i < 3; i++) {
-	    if (location[i] === loc) { return true }
+
+	  var gap;
+	  var indent;
+	  var meta;
+	  var rep;
+
+	  function quote(string) {
+	    // If the string contains no control characters, no quote characters, and no
+	    // backslash characters, then we can safely slap some quotes around it.
+	    // Otherwise we must also replace the offending characters with safe escape
+	    // sequences.
+	    rx_escapable.lastIndex = 0;
+	    return rx_escapable.test(string) ? "\"" + string.replace(rx_escapable, function (a) {
+	      var c = meta[a];
+	      return typeof c === "string" ? c : "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
+	    }) + "\"" : "\"" + string + "\"";
 	  }
-	  return false
-	};
-	OverlayResultValidator.computeBoundaryDistanceTolerance = function computeBoundaryDistanceTolerance (g0, g1) {
-	  return Math.min(GeometrySnapper.computeSizeBasedSnapTolerance(g0), GeometrySnapper.computeSizeBasedSnapTolerance(g1))
-	};
-	OverlayResultValidator.isValid = function isValid (a, b, overlayOp, result) {
-	  var validator = new OverlayResultValidator(a, b, result);
-	  return validator.isValid(overlayOp)
-	};
-	staticAccessors$46.TOLERANCE.get = function () { return 0.000001 };
 
-	Object.defineProperties( OverlayResultValidator, staticAccessors$46 );
+	  function str(key, holder) {
+	    // Produce a string from holder[key].
+	    var i; // The loop counter.
 
-	// operation.overlay
+	    var k; // The member key.
 
-	var GeometryCombiner = function GeometryCombiner (geoms) {
-	  this._geomFactory = null;
-	  this._skipEmpty = false;
-	  this._inputGeoms = null;
-	  this._geomFactory = GeometryCombiner.extractFactory(geoms);
-	  this._inputGeoms = geoms;
-	};
-	GeometryCombiner.prototype.extractElements = function extractElements (geom, elems) {
-	    var this$1 = this;
+	    var v; // The member value.
 
-	  if (geom === null) { return null }
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var elemGeom = geom.getGeometryN(i);
-	    if (this$1._skipEmpty && elemGeom.isEmpty()) { continue }
-	    elems.add(elemGeom);
-	  }
-	};
-	GeometryCombiner.prototype.combine = function combine () {
-	    var this$1 = this;
+	    var length;
+	    var mind = gap;
+	    var partial;
+	    var value = holder[key]; // If the value has a toJSON method, call it to obtain a replacement value.
 
-	  var elems = new ArrayList();
-	  for (var i = this._inputGeoms.iterator(); i.hasNext();) {
-	    var g = i.next();
-	    this$1.extractElements(g, elems);
-	  }
-	  if (elems.size() === 0) {
-	    if (this._geomFactory !== null) {
-	      return this._geomFactory.createGeometryCollection(null)
-	    }
-	    return null
-	  }
-	  return this._geomFactory.buildGeometry(elems)
-	};
-	GeometryCombiner.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryCombiner.prototype.getClass = function getClass () {
-	  return GeometryCombiner
-	};
-	GeometryCombiner.combine = function combine () {
-	  if (arguments.length === 1) {
-	    var geoms = arguments[0];
-	    var combiner = new GeometryCombiner(geoms);
-	    return combiner.combine()
-	  } else if (arguments.length === 2) {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    var combiner$1 = new GeometryCombiner(GeometryCombiner.createList(g0, g1));
-	    return combiner$1.combine()
-	  } else if (arguments.length === 3) {
-	    var g0$1 = arguments[0];
-	    var g1$1 = arguments[1];
-	    var g2 = arguments[2];
-	    var combiner$2 = new GeometryCombiner(GeometryCombiner.createList(g0$1, g1$1, g2));
-	    return combiner$2.combine()
-	  }
-	};
-	GeometryCombiner.extractFactory = function extractFactory (geoms) {
-	  if (geoms.isEmpty()) { return null }
-	  return geoms.iterator().next().getFactory()
-	};
-	GeometryCombiner.createList = function createList () {
-	  if (arguments.length === 2) {
-	    var obj0 = arguments[0];
-	    var obj1 = arguments[1];
-	    var list = new ArrayList();
-	    list.add(obj0);
-	    list.add(obj1);
-	    return list
-	  } else if (arguments.length === 3) {
-	    var obj0$1 = arguments[0];
-	    var obj1$1 = arguments[1];
-	    var obj2 = arguments[2];
-	    var list$1 = new ArrayList();
-	    list$1.add(obj0$1);
-	    list$1.add(obj1$1);
-	    list$1.add(obj2);
-	    return list$1
-	  }
-	};
+	    if (value && _typeof(value) === "object" && typeof value.toJSON === "function") {
+	      value = value.toJSON(key);
+	    } // If we were called with a replacer function, then call the replacer to
+	    // obtain a replacement value.
 
-	var CascadedPolygonUnion = function CascadedPolygonUnion () {
-	  this._inputPolys = null;
-	  this._geomFactory = null;
-	  var polys = arguments[0];
-	  this._inputPolys = polys;
-	  if (this._inputPolys === null) { this._inputPolys = new ArrayList(); }
-	};
 
-	var staticAccessors$47 = { STRTREE_NODE_CAPACITY: { configurable: true } };
-	CascadedPolygonUnion.prototype.reduceToGeometries = function reduceToGeometries (geomTree) {
-	    var this$1 = this;
+	    if (typeof rep === "function") {
+	      value = rep.call(holder, key, value);
+	    } // What happens next depends on the value's type.
 
-	  var geoms = new ArrayList();
-	  for (var i = geomTree.iterator(); i.hasNext();) {
-	    var o = i.next();
-	    var geom = null;
-	    if (hasInterface(o, List)) {
-	      geom = this$1.unionTree(o);
-	    } else if (o instanceof Geometry) {
-	      geom = o;
-	    }
-	    geoms.add(geom);
-	  }
-	  return geoms
-	};
-	CascadedPolygonUnion.prototype.extractByEnvelope = function extractByEnvelope (env, geom, disjointGeoms) {
-	  var intersectingGeoms = new ArrayList();
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var elem = geom.getGeometryN(i);
-	    if (elem.getEnvelopeInternal().intersects(env)) { intersectingGeoms.add(elem); } else { disjointGeoms.add(elem); }
-	  }
-	  return this._geomFactory.buildGeometry(intersectingGeoms)
-	};
-	CascadedPolygonUnion.prototype.unionOptimized = function unionOptimized (g0, g1) {
-	  var g0Env = g0.getEnvelopeInternal();
-	  var g1Env = g1.getEnvelopeInternal();
-	  if (!g0Env.intersects(g1Env)) {
-	    var combo = GeometryCombiner.combine(g0, g1);
-	    return combo
-	  }
-	  if (g0.getNumGeometries() <= 1 && g1.getNumGeometries() <= 1) { return this.unionActual(g0, g1) }
-	  var commonEnv = g0Env.intersection(g1Env);
-	  return this.unionUsingEnvelopeIntersection(g0, g1, commonEnv)
-	};
-	CascadedPolygonUnion.prototype.union = function union () {
-	  if (this._inputPolys === null) { throw new Error('union() method cannot be called twice') }
-	  if (this._inputPolys.isEmpty()) { return null }
-	  this._geomFactory = this._inputPolys.iterator().next().getFactory();
-	  var index = new STRtree(CascadedPolygonUnion.STRTREE_NODE_CAPACITY);
-	  for (var i = this._inputPolys.iterator(); i.hasNext();) {
-	    var item = i.next();
-	    index.insert(item.getEnvelopeInternal(), item);
-	  }
-	  this._inputPolys = null;
-	  var itemTree = index.itemsTree();
-	  var unionAll = this.unionTree(itemTree);
-	  return unionAll
-	};
-	CascadedPolygonUnion.prototype.binaryUnion = function binaryUnion () {
-	  if (arguments.length === 1) {
-	    var geoms = arguments[0];
-	    return this.binaryUnion(geoms, 0, geoms.size())
-	  } else if (arguments.length === 3) {
-	    var geoms$1 = arguments[0];
-	    var start = arguments[1];
-	    var end = arguments[2];
-	    if (end - start <= 1) {
-	      var g0 = CascadedPolygonUnion.getGeometry(geoms$1, start);
-	      return this.unionSafe(g0, null)
-	    } else if (end - start === 2) {
-	      return this.unionSafe(CascadedPolygonUnion.getGeometry(geoms$1, start), CascadedPolygonUnion.getGeometry(geoms$1, start + 1))
-	    } else {
-	      var mid = Math.trunc((end + start) / 2);
-	      var g0$1 = this.binaryUnion(geoms$1, start, mid);
-	      var g1 = this.binaryUnion(geoms$1, mid, end);
-	      return this.unionSafe(g0$1, g1)
-	    }
-	  }
-	};
-	CascadedPolygonUnion.prototype.repeatedUnion = function repeatedUnion (geoms) {
-	  var union = null;
-	  for (var i = geoms.iterator(); i.hasNext();) {
-	    var g = i.next();
-	    if (union === null) { union = g.copy(); } else { union = union.union(g); }
-	  }
-	  return union
-	};
-	CascadedPolygonUnion.prototype.unionSafe = function unionSafe (g0, g1) {
-	  if (g0 === null && g1 === null) { return null }
-	  if (g0 === null) { return g1.copy() }
-	  if (g1 === null) { return g0.copy() }
-	  return this.unionOptimized(g0, g1)
-	};
-	CascadedPolygonUnion.prototype.unionActual = function unionActual (g0, g1) {
-	  return CascadedPolygonUnion.restrictToPolygons(g0.union(g1))
-	};
-	CascadedPolygonUnion.prototype.unionTree = function unionTree (geomTree) {
-	  var geoms = this.reduceToGeometries(geomTree);
-	  var union = this.binaryUnion(geoms);
-	  return union
-	};
-	CascadedPolygonUnion.prototype.unionUsingEnvelopeIntersection = function unionUsingEnvelopeIntersection (g0, g1, common) {
-	  var disjointPolys = new ArrayList();
-	  var g0Int = this.extractByEnvelope(common, g0, disjointPolys);
-	  var g1Int = this.extractByEnvelope(common, g1, disjointPolys);
-	  var union = this.unionActual(g0Int, g1Int);
-	  disjointPolys.add(union);
-	  var overallUnion = GeometryCombiner.combine(disjointPolys);
-	  return overallUnion
-	};
-	CascadedPolygonUnion.prototype.bufferUnion = function bufferUnion () {
-	  if (arguments.length === 1) {
-	    var geoms = arguments[0];
-	    var factory = geoms.get(0).getFactory();
-	    var gColl = factory.buildGeometry(geoms);
-	    var unionAll = gColl.buffer(0.0);
-	    return unionAll
-	  } else if (arguments.length === 2) {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    var factory$1 = g0.getFactory();
-	    var gColl$1 = factory$1.createGeometryCollection([g0, g1]);
-	    var unionAll$1 = gColl$1.buffer(0.0);
-	    return unionAll$1
-	  }
-	};
-	CascadedPolygonUnion.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CascadedPolygonUnion.prototype.getClass = function getClass () {
-	  return CascadedPolygonUnion
-	};
-	CascadedPolygonUnion.restrictToPolygons = function restrictToPolygons (g) {
-	  if (hasInterface(g, Polygonal)) {
-	    return g
-	  }
-	  var polygons = PolygonExtracter.getPolygons(g);
-	  if (polygons.size() === 1) { return polygons.get(0) }
-	  return g.getFactory().createMultiPolygon(GeometryFactory.toPolygonArray(polygons))
-	};
-	CascadedPolygonUnion.getGeometry = function getGeometry (list, index) {
-	  if (index >= list.size()) { return null }
-	  return list.get(index)
-	};
-	CascadedPolygonUnion.union = function union (polys) {
-	  var op = new CascadedPolygonUnion(polys);
-	  return op.union()
-	};
-	staticAccessors$47.STRTREE_NODE_CAPACITY.get = function () { return 4 };
 
-	Object.defineProperties( CascadedPolygonUnion, staticAccessors$47 );
+	    switch (_typeof(value)) {
+	      case "string":
+	        return quote(value);
 
-	var UnionOp = function UnionOp () {};
+	      case "number":
+	        // JSON numbers must be finite. Encode non-finite numbers as null.
+	        return isFinite(value) ? String(value) : "null";
 
-	UnionOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	UnionOp.prototype.getClass = function getClass () {
-	  return UnionOp
-	};
-	UnionOp.union = function union (g, other) {
-	  if (g.isEmpty() || other.isEmpty()) {
-	    if (g.isEmpty() && other.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.UNION, g, other, g.getFactory()) }
-	    if (g.isEmpty()) { return other.copy() }
-	    if (other.isEmpty()) { return g.copy() }
-	  }
-	  g.checkNotGeometryCollection(g);
-	  g.checkNotGeometryCollection(other);
-	  return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.UNION)
-	};
+	      case "boolean":
+	      case "null":
+	        // If the value is a boolean or null, convert it to a string. Note:
+	        // typeof null does not produce "null". The case is included here in
+	        // the remote chance that this gets fixed someday.
+	        return String(value);
+	      // If the type is "object", we might be dealing with an object or an array or
+	      // null.
 
-	/**
-	 * Earth Radius used with the Harvesine formula and approximates using a spherical (non-ellipsoid) Earth.
-	 */
+	      case "object":
+	        // Due to a specification blunder in ECMAScript, typeof null is "object",
+	        // so watch out for that case.
+	        if (!value) {
+	          return "null";
+	        } // Make an array to hold the partial results of stringifying this object value.
 
-	/**
-	 * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
-	 *
-	 * @name feature
-	 * @param {Geometry} geometry input geometry
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature} a GeoJSON Feature
-	 * @example
-	 * var geometry = {
-	 *   "type": "Point",
-	 *   "coordinates": [110, 50]
-	 * };
-	 *
-	 * var feature = turf.feature(geometry);
-	 *
-	 * //=feature
-	 */
-	function feature$1(geometry, properties, options) {
-	    // Optional Parameters
-	    options = options || {};
-	    if (!isObject$4(options)) { throw new Error('options is invalid'); }
-	    var bbox = options.bbox;
-	    var id = options.id;
 
-	    // Validation
-	    if (geometry === undefined) { throw new Error('geometry is required'); }
-	    if (properties && properties.constructor !== Object) { throw new Error('properties must be an Object'); }
-	    if (bbox) { validateBBox(bbox); }
-	    if (id) { validateId(id); }
+	        gap += indent;
+	        partial = []; // Is the value an array?
 
-	    // Main
-	    var feat = {type: 'Feature'};
-	    if (id) { feat.id = id; }
-	    if (bbox) { feat.bbox = bbox; }
-	    feat.properties = properties || {};
-	    feat.geometry = geometry;
-	    return feat;
-	}
+	        if (Object.prototype.toString.apply(value) === "[object Array]") {
+	          // The value is an array. Stringify every element. Use null as a placeholder
+	          // for non-JSON values.
+	          length = value.length;
 
-	/**
-	 * isNumber
-	 *
-	 * @param {*} num Number to validate
-	 * @returns {boolean} true/false
-	 * @example
-	 * turf.isNumber(123)
-	 * //=true
-	 * turf.isNumber('foo')
-	 * //=false
-	 */
-	function isNumber$1(num) {
-	    return !isNaN(num) && num !== null && !Array.isArray(num);
-	}
+	          for (i = 0; i < length; i += 1) {
+	            partial[i] = str(i, value) || "null";
+	          } // Join all of the elements together, separated with commas, and wrap them in
+	          // brackets.
 
-	/**
-	 * isObject
-	 *
-	 * @param {*} input variable to validate
-	 * @returns {boolean} true/false
-	 * @example
-	 * turf.isObject({elevation: 10})
-	 * //=true
-	 * turf.isObject('foo')
-	 * //=false
-	 */
-	function isObject$4(input) {
-	    return (!!input) && (input.constructor === Object);
-	}
 
-	/**
-	 * Validate BBox
-	 *
-	 * @private
-	 * @param {Array<number>} bbox BBox to validate
-	 * @returns {void}
-	 * @throws Error if BBox is not valid
-	 * @example
-	 * validateBBox([-180, -40, 110, 50])
-	 * //=OK
-	 * validateBBox([-180, -40])
-	 * //=Error
-	 * validateBBox('Foo')
-	 * //=Error
-	 * validateBBox(5)
-	 * //=Error
-	 * validateBBox(null)
-	 * //=Error
-	 * validateBBox(undefined)
-	 * //=Error
-	 */
-	function validateBBox(bbox) {
-	    if (!bbox) { throw new Error('bbox is required'); }
-	    if (!Array.isArray(bbox)) { throw new Error('bbox must be an Array'); }
-	    if (bbox.length !== 4 && bbox.length !== 6) { throw new Error('bbox must be an Array of 4 or 6 numbers'); }
-	    bbox.forEach(function (num) {
-	        if (!isNumber$1(num)) { throw new Error('bbox must only contain numbers'); }
-	    });
-	}
+	          v = partial.length === 0 ? "[]" : gap ? "[\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "]" : "[" + partial.join(",") + "]";
+	          gap = mind;
+	          return v;
+	        } // If the replacer is an array, use it to select the members to be stringified.
 
-	/**
-	 * Validate Id
-	 *
-	 * @private
-	 * @param {string|number} id Id to validate
-	 * @returns {void}
-	 * @throws Error if Id is not valid
-	 * @example
-	 * validateId([-180, -40, 110, 50])
-	 * //=Error
-	 * validateId([-180, -40])
-	 * //=Error
-	 * validateId('Foo')
-	 * //=OK
-	 * validateId(5)
-	 * //=OK
-	 * validateId(null)
-	 * //=Error
-	 * validateId(undefined)
-	 * //=Error
-	 */
-	function validateId(id) {
-	    if (!id) { throw new Error('id is required'); }
-	    if (['string', 'number'].indexOf(typeof id) === -1) { throw new Error('id must be a number or a string'); }
-	}
 
-	/**
-	 * Callback for geomEach
-	 *
-	 * @callback geomEachCallback
-	 * @param {Geometry} currentGeometry The current Geometry being processed.
-	 * @param {number} featureIndex The current index of the Feature being processed.
-	 * @param {Object} featureProperties The current Feature Properties being processed.
-	 * @param {Array<number>} featureBBox The current Feature BBox being processed.
-	 * @param {number|string} featureId The current Feature Id being processed.
-	 */
+	        if (rep && _typeof(rep) === "object") {
+	          length = rep.length;
 
-	/**
-	 * Iterate over each geometry in any GeoJSON object, similar to Array.forEach()
-	 *
-	 * @name geomEach
-	 * @param {FeatureCollection|Feature|Geometry} geojson any GeoJSON object
-	 * @param {Function} callback a method that takes (currentGeometry, featureIndex, featureProperties, featureBBox, featureId)
-	 * @returns {void}
-	 * @example
-	 * var features = turf.featureCollection([
-	 *     turf.point([26, 37], {foo: 'bar'}),
-	 *     turf.point([36, 53], {hello: 'world'})
-	 * ]);
-	 *
-	 * turf.geomEach(features, function (currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {
-	 *   //=currentGeometry
-	 *   //=featureIndex
-	 *   //=featureProperties
-	 *   //=featureBBox
-	 *   //=featureId
-	 * });
-	 */
-	function geomEach(geojson, callback) {
-	    var i, j, g, geometry, stopG,
-	        geometryMaybeCollection,
-	        isGeometryCollection,
-	        featureProperties,
-	        featureBBox,
-	        featureId,
-	        featureIndex = 0,
-	        isFeatureCollection = geojson.type === 'FeatureCollection',
-	        isFeature = geojson.type === 'Feature',
-	        stop = isFeatureCollection ? geojson.features.length : 1;
-
-	    // This logic may look a little weird. The reason why it is that way
-	    // is because it's trying to be fast. GeoJSON supports multiple kinds
-	    // of objects at its root: FeatureCollection, Features, Geometries.
-	    // This function has the responsibility of handling all of them, and that
-	    // means that some of the `for` loops you see below actually just don't apply
-	    // to certain inputs. For instance, if you give this just a
-	    // Point geometry, then both loops are short-circuited and all we do
-	    // is gradually rename the input until it's called 'geometry'.
-	    //
-	    // This also aims to allocate as few resources as possible: just a
-	    // few numbers and booleans, rather than any temporary arrays as would
-	    // be required with the normalization approach.
-	    for (i = 0; i < stop; i++) {
-
-	        geometryMaybeCollection = (isFeatureCollection ? geojson.features[i].geometry :
-	            (isFeature ? geojson.geometry : geojson));
-	        featureProperties = (isFeatureCollection ? geojson.features[i].properties :
-	            (isFeature ? geojson.properties : {}));
-	        featureBBox = (isFeatureCollection ? geojson.features[i].bbox :
-	            (isFeature ? geojson.bbox : undefined));
-	        featureId = (isFeatureCollection ? geojson.features[i].id :
-	            (isFeature ? geojson.id : undefined));
-	        isGeometryCollection = (geometryMaybeCollection) ? geometryMaybeCollection.type === 'GeometryCollection' : false;
-	        stopG = isGeometryCollection ? geometryMaybeCollection.geometries.length : 1;
-
-	        for (g = 0; g < stopG; g++) {
-	            geometry = isGeometryCollection ?
-	                geometryMaybeCollection.geometries[g] : geometryMaybeCollection;
-
-	            // Handle null Geometry
-	            if (geometry === null) {
-	                if (callback(null, featureIndex, featureProperties, featureBBox, featureId) === false) { return false; }
-	                continue;
-	            }
-	            switch (geometry.type) {
-	            case 'Point':
-	            case 'LineString':
-	            case 'MultiPoint':
-	            case 'Polygon':
-	            case 'MultiLineString':
-	            case 'MultiPolygon': {
-	                if (callback(geometry, featureIndex, featureProperties, featureBBox, featureId) === false) { return false; }
-	                break;
-	            }
-	            case 'GeometryCollection': {
-	                for (j = 0; j < geometry.geometries.length; j++) {
-	                    if (callback(geometry.geometries[j], featureIndex, featureProperties, featureBBox, featureId) === false) { return false; }
-	                }
-	                break;
+	          for (i = 0; i < length; i += 1) {
+	            if (typeof rep[i] === "string") {
+	              k = rep[i];
+	              v = str(k, value);
+
+	              if (v) {
+	                partial.push(quote(k) + (gap ? ": " : ":") + v);
+	              }
 	            }
-	            default:
-	                throw new Error('Unknown Geometry Type');
+	          }
+	        } else {
+	          // Otherwise, iterate through all of the keys in the object.
+	          for (k in value) {
+	            if (Object.prototype.hasOwnProperty.call(value, k)) {
+	              v = str(k, value);
+
+	              if (v) {
+	                partial.push(quote(k) + (gap ? ": " : ":") + v);
+	              }
 	            }
-	        }
-	        // Only increase `featureIndex` per each feature
-	        featureIndex++;
-	    }
-	}
+	          }
+	        } // Join all of the member texts together, separated with commas,
+	        // and wrap them in braces.
 
-	/**
-	 * Callback for geomReduce
-	 *
-	 * The first time the callback function is called, the values provided as arguments depend
-	 * on whether the reduce method has an initialValue argument.
-	 *
-	 * If an initialValue is provided to the reduce method:
-	 *  - The previousValue argument is initialValue.
-	 *  - The currentValue argument is the value of the first element present in the array.
-	 *
-	 * If an initialValue is not provided:
-	 *  - The previousValue argument is the value of the first element present in the array.
-	 *  - The currentValue argument is the value of the second element present in the array.
-	 *
-	 * @callback geomReduceCallback
-	 * @param {*} previousValue The accumulated value previously returned in the last invocation
-	 * of the callback, or initialValue, if supplied.
-	 * @param {Geometry} currentGeometry The current Geometry being processed.
-	 * @param {number} featureIndex The current index of the Feature being processed.
-	 * @param {Object} featureProperties The current Feature Properties being processed.
-	 * @param {Array<number>} featureBBox The current Feature BBox being processed.
-	 * @param {number|string} featureId The current Feature Id being processed.
-	 */
 
-	/**
-	 * Reduce geometry in any GeoJSON object, similar to Array.reduce().
-	 *
-	 * @name geomReduce
-	 * @param {FeatureCollection|Feature|Geometry} geojson any GeoJSON object
-	 * @param {Function} callback a method that takes (previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId)
-	 * @param {*} [initialValue] Value to use as the first argument to the first call of the callback.
-	 * @returns {*} The value that results from the reduction.
-	 * @example
-	 * var features = turf.featureCollection([
-	 *     turf.point([26, 37], {foo: 'bar'}),
-	 *     turf.point([36, 53], {hello: 'world'})
-	 * ]);
-	 *
-	 * turf.geomReduce(features, function (previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {
-	 *   //=previousValue
-	 *   //=currentGeometry
-	 *   //=featureIndex
-	 *   //=featureProperties
-	 *   //=featureBBox
-	 *   //=featureId
-	 *   return currentGeometry
-	 * });
-	 */
-	function geomReduce(geojson, callback, initialValue) {
-	    var previousValue = initialValue;
-	    geomEach(geojson, function (currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {
-	        if (featureIndex === 0 && initialValue === undefined) { previousValue = currentGeometry; }
-	        else { previousValue = callback(previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId); }
-	    });
-	    return previousValue;
-	}
+	        v = partial.length === 0 ? "{}" : gap ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}" : "{" + partial.join(",") + "}";
+	        gap = mind;
+	        return v;
+	    }
+	  } // If the JSON object does not yet have a stringify method, give it one.
 
-	/**
-	 * Callback for flattenEach
-	 *
-	 * @callback flattenEachCallback
-	 * @param {Feature} currentFeature The current flattened feature being processed.
-	 * @param {number} featureIndex The current index of the Feature being processed.
-	 * @param {number} multiFeatureIndex The current index of the Multi-Feature being processed.
-	 */
 
-	/**
-	 * Iterate over flattened features in any GeoJSON object, similar to
-	 * Array.forEach.
-	 *
-	 * @name flattenEach
-	 * @param {FeatureCollection|Feature|Geometry} geojson any GeoJSON object
-	 * @param {Function} callback a method that takes (currentFeature, featureIndex, multiFeatureIndex)
-	 * @example
-	 * var features = turf.featureCollection([
-	 *     turf.point([26, 37], {foo: 'bar'}),
-	 *     turf.multiPoint([[40, 30], [36, 53]], {hello: 'world'})
-	 * ]);
-	 *
-	 * turf.flattenEach(features, function (currentFeature, featureIndex, multiFeatureIndex) {
-	 *   //=currentFeature
-	 *   //=featureIndex
-	 *   //=multiFeatureIndex
-	 * });
-	 */
-	function flattenEach(geojson, callback) {
-	    geomEach(geojson, function (geometry, featureIndex, properties, bbox, id) {
-	        // Callback for single geometry
-	        var type = (geometry === null) ? null : geometry.type;
-	        switch (type) {
-	        case null:
-	        case 'Point':
-	        case 'LineString':
-	        case 'Polygon':
-	            if (callback(feature$1(geometry, properties, {bbox: bbox, id: id}), featureIndex, 0) === false) { return false; }
-	            return;
-	        }
+	  if (typeof JSON.stringify !== "function") {
+	    meta = {
+	      // table of character substitutions
+	      "\b": "\\b",
+	      "\t": "\\t",
+	      "\n": "\\n",
+	      "\f": "\\f",
+	      "\r": "\\r",
+	      "\"": "\\\"",
+	      "\\": "\\\\"
+	    };
 
-	        var geomType;
+	    JSON.stringify = function (value, replacer, space) {
+	      // The stringify method takes a value and an optional replacer, and an optional
+	      // space parameter, and returns a JSON text. The replacer can be a function
+	      // that can replace values, or an array of strings that will select the keys.
+	      // A default replacer method can be provided. Use of the space parameter can
+	      // produce text that is more easily readable.
+	      var i;
+	      gap = "";
+	      indent = ""; // If the space parameter is a number, make an indent string containing that
+	      // many spaces.
 
-	        // Callback for multi-geometry
-	        switch (type) {
-	        case 'MultiPoint':
-	            geomType = 'Point';
-	            break;
-	        case 'MultiLineString':
-	            geomType = 'LineString';
-	            break;
-	        case 'MultiPolygon':
-	            geomType = 'Polygon';
-	            break;
-	        }
+	      if (typeof space === "number") {
+	        for (i = 0; i < space; i += 1) {
+	          indent += " ";
+	        } // If the space parameter is a string, it will be used as the indent string.
 
-	        for (var multiFeatureIndex = 0; multiFeatureIndex < geometry.coordinates.length; multiFeatureIndex++) {
-	            var coordinate = geometry.coordinates[multiFeatureIndex];
-	            var geom = {
-	                type: geomType,
-	                coordinates: coordinate
-	            };
-	            if (callback(feature$1(geom, properties), featureIndex, multiFeatureIndex) === false) { return false; }
-	        }
-	    });
-	}
+	      } else if (typeof space === "string") {
+	        indent = space;
+	      } // If there is a replacer, it must be a function or an array.
+	      // Otherwise, throw an error.
 
-	/**
-	 * Takes one or more features and returns their area in square meters.
-	 *
-	 * @name area
-	 * @param {GeoJSON} geojson input GeoJSON feature(s)
-	 * @returns {number} area in square meters
-	 * @example
-	 * var polygon = turf.polygon([[[125, -15], [113, -22], [154, -27], [144, -15], [125, -15]]]);
-	 *
-	 * var area = turf.area(polygon);
-	 *
-	 * //addToMap
-	 * var addToMap = [polygon]
-	 * polygon.properties.area = area
-	 */
-	function area(geojson) {
-	    return geomReduce(geojson, function (value, geom) {
-	        return value + calculateArea(geom);
-	    }, 0);
-	}
 
-	var RADIUS$1 = 6378137;
-	// var FLATTENING_DENOM = 298.257223563;
-	// var FLATTENING = 1 / FLATTENING_DENOM;
-	// var POLAR_RADIUS = RADIUS * (1 - FLATTENING);
+	      rep = replacer;
 
-	/**
-	 * Calculate Area
-	 *
-	 * @private
-	 * @param {GeoJSON} geojson GeoJSON
-	 * @returns {number} area
-	 */
-	function calculateArea(geojson) {
-	    var area = 0, i;
-	    switch (geojson.type) {
-	    case 'Polygon':
-	        return polygonArea$1(geojson.coordinates);
-	    case 'MultiPolygon':
-	        for (i = 0; i < geojson.coordinates.length; i++) {
-	            area += polygonArea$1(geojson.coordinates[i]);
-	        }
-	        return area;
-	    case 'Point':
-	    case 'MultiPoint':
-	    case 'LineString':
-	    case 'MultiLineString':
-	        return 0;
-	    case 'GeometryCollection':
-	        for (i = 0; i < geojson.geometries.length; i++) {
-	            area += calculateArea(geojson.geometries[i]);
-	        }
-	        return area;
-	    }
-	}
+	      if (replacer && typeof replacer !== "function" && (_typeof(replacer) !== "object" || typeof replacer.length !== "number")) {
+	        throw new Error("JSON.stringify");
+	      } // Make a fake root object containing our value under the key of "".
+	      // Return the result of stringifying the value.
 
-	function polygonArea$1(coords) {
-	    var area = 0;
-	    if (coords && coords.length > 0) {
-	        area += Math.abs(ringArea$1(coords[0]));
-	        for (var i = 1; i < coords.length; i++) {
-	            area -= Math.abs(ringArea$1(coords[i]));
-	        }
-	    }
-	    return area;
-	}
 
-	/**
-	 * @private
-	 * Calculate the approximate area of the polygon were it projected onto the earth.
-	 * Note that this area will be positive if ring is oriented clockwise, otherwise it will be negative.
-	 *
-	 * Reference:
-	 * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
-	 * Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
-	 *
-	 * @param {Array<Array<number>>} coords Ring Coordinates
-	 * @returns {number} The approximate signed geodesic area of the polygon in square meters.
-	 */
-	function ringArea$1(coords) {
-	    var p1;
-	    var p2;
-	    var p3;
-	    var lowerIndex;
-	    var middleIndex;
-	    var upperIndex;
-	    var i;
-	    var area = 0;
-	    var coordsLength = coords.length;
-
-	    if (coordsLength > 2) {
-	        for (i = 0; i < coordsLength; i++) {
-	            if (i === coordsLength - 2) { // i = N-2
-	                lowerIndex = coordsLength - 2;
-	                middleIndex = coordsLength - 1;
-	                upperIndex = 0;
-	            } else if (i === coordsLength - 1) { // i = N-1
-	                lowerIndex = coordsLength - 1;
-	                middleIndex = 0;
-	                upperIndex = 1;
-	            } else { // i = 0 to N-3
-	                lowerIndex = i;
-	                middleIndex = i + 1;
-	                upperIndex = i + 2;
-	            }
-	            p1 = coords[lowerIndex];
-	            p2 = coords[middleIndex];
-	            p3 = coords[upperIndex];
-	            area += (rad$1(p3[0]) - rad$1(p1[0])) * Math.sin(rad$1(p2[1]));
-	        }
+	      return str("", {
+	        "": value
+	      });
+	    };
+	  } // If the JSON object does not yet have a parse method, give it one.
 
-	        area = area * RADIUS$1 * RADIUS$1 / 2;
-	    }
 
-	    return area;
-	}
+	  if (typeof JSON.parse !== "function") {
+	    JSON.parse = function (text, reviver) {
+	      // The parse method takes a text and an optional reviver function, and returns
+	      // a JavaScript value if the text is a valid JSON text.
+	      var j;
 
-	function rad$1(_) {
-	    return _ * Math.PI / 180;
-	}
+	      function walk(holder, key) {
+	        // The walk method is used to recursively walk the resulting structure so
+	        // that modifications can be made.
+	        var k;
+	        var v;
+	        var value = holder[key];
 
-	/**
-	 * Get Geometry from Feature or Geometry Object
-	 *
-	 * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
-	 * @returns {Geometry|null} GeoJSON Geometry Object
-	 * @throws {Error} if geojson is not a Feature or Geometry Object
-	 * @example
-	 * var point = {
-	 *   "type": "Feature",
-	 *   "properties": {},
-	 *   "geometry": {
-	 *     "type": "Point",
-	 *     "coordinates": [110, 40]
-	 *   }
-	 * }
-	 * var geom = turf.getGeom(point)
-	 * //={"type": "Point", "coordinates": [110, 40]}
-	 */
-	function getGeom(geojson) {
-	    if (!geojson) { throw new Error('geojson is required'); }
-	    if (geojson.geometry !== undefined) { return geojson.geometry; }
-	    if (geojson.coordinates || geojson.geometries) { return geojson; }
-	    throw new Error('geojson must be a valid Feature or Geometry Object');
-	}
+	        if (value && _typeof(value) === "object") {
+	          for (k in value) {
+	            if (Object.prototype.hasOwnProperty.call(value, k)) {
+	              v = walk(value, k);
 
-	/**
-	 * Finds the difference between two {@link Polygon|polygons} by clipping the second polygon from the first.
-	 *
-	 * @name difference
-	 * @param {Feature<Polygon|MultiPolygon>} polygon1 input Polygon feature
-	 * @param {Feature<Polygon|MultiPolygon>} polygon2 Polygon feature to difference from polygon1
-	 * @returns {Feature<Polygon|MultiPolygon>|null} a Polygon or MultiPolygon feature showing the area of `polygon1` excluding the area of `polygon2` (if empty returns `null`)
-	 * @example
-	 * var polygon1 = turf.polygon([[
-	 *   [128, -26],
-	 *   [141, -26],
-	 *   [141, -21],
-	 *   [128, -21],
-	 *   [128, -26]
-	 * ]], {
-	 *   "fill": "#F00",
-	 *   "fill-opacity": 0.1
-	 * });
-	 * var polygon2 = turf.polygon([[
-	 *   [126, -28],
-	 *   [140, -28],
-	 *   [140, -20],
-	 *   [126, -20],
-	 *   [126, -28]
-	 * ]], {
-	 *   "fill": "#00F",
-	 *   "fill-opacity": 0.1
-	 * });
-	 *
-	 * var difference = turf.difference(polygon1, polygon2);
-	 *
-	 * //addToMap
-	 * var addToMap = [polygon1, polygon2, difference];
-	 */
-	function difference(polygon1, polygon2) {
-	    var geom1 = getGeom(polygon1);
-	    var geom2 = getGeom(polygon2);
-	    var properties = polygon1.properties || {};
+	              if (v !== undefined) {
+	                value[k] = v;
+	              } else {
+	                delete value[k];
+	              }
+	            }
+	          }
+	        }
 
-	    // Issue #721 - JSTS can't handle empty polygons
-	    geom1 = removeEmptyPolygon(geom1);
-	    geom2 = removeEmptyPolygon(geom2);
-	    if (!geom1) { return null; }
-	    if (!geom2) { return feature$1(geom1, properties); }
+	        return reviver.call(holder, key, value);
+	      } // Parsing happens in four stages. In the first stage, we replace certain
+	      // Unicode characters with escape sequences. JavaScript handles many characters
+	      // incorrectly, either silently deleting them, or treating them as line endings.
 
-	    // JSTS difference operation
-	    var reader = new GeoJSONReader();
-	    var a = reader.read(geom1);
-	    var b = reader.read(geom2);
-	    var differenced = OverlayOp.difference(a, b);
-	    if (differenced.isEmpty()) { return null; }
-	    var writer = new GeoJSONWriter();
-	    var geom = writer.write(differenced);
 
-	    return feature$1(geom, properties);
-	}
+	      text = String(text);
+	      rx_dangerous.lastIndex = 0;
 
-	/**
-	 * Detect Empty Polygon
-	 *
-	 * @private
-	 * @param {Geometry<Polygon|MultiPolygon>} geom Geometry Object
-	 * @returns {Geometry<Polygon|MultiPolygon>|null} removed any polygons with no areas
-	 */
-	function removeEmptyPolygon(geom) {
-	    switch (geom.type) {
-	    case 'Polygon':
-	        if (area(geom) > 1) { return geom; }
-	        return null;
-	    case 'MultiPolygon':
-	        var coordinates = [];
-	        flattenEach(geom, function (feature$$1) {
-	            if (area(feature$$1) > 1) { coordinates.push(feature$$1.geometry.coordinates); }
+	      if (rx_dangerous.test(text)) {
+	        text = text.replace(rx_dangerous, function (a) {
+	          return "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
 	        });
-	        if (coordinates.length) { return {type: 'MultiPolygon', coordinates: coordinates}; }
-	    }
-	}
+	      } // In the second stage, we run the text against regular expressions that look
+	      // for non-JSON patterns. We are especially concerned with "()" and "new"
+	      // because they can cause invocation, and "=" because it can cause mutation.
+	      // But just to be safe, we want to reject all unexpected forms.
+	      // We split the second stage into 4 regexp operations in order to work around
+	      // crippling inefficiencies in IE's and Safari's regexp engines. First we
+	      // replace the JSON backslash pairs with "@" (a non-JSON character). Second, we
+	      // replace all simple value tokens with "]" characters. Third, we delete all
+	      // open brackets that follow a colon or comma or that begin the text. Finally,
+	      // we look to see that the remaining characters are only whitespace or "]" or
+	      // "," or ":" or "{" or "}". If that is so, then the text is safe for eval.
 
-	/**
-	 * Takes two or more {@link Polygon|polygons} and returns a combined polygon. If the input polygons are not contiguous, this function returns a {@link MultiPolygon} feature.
-	 *
-	 * @name union
-	 * @param {...Feature<Polygon>} A polygon to combine
-	 * @returns {Feature<(Polygon|MultiPolygon)>} a combined {@link Polygon} or {@link MultiPolygon} feature
-	 * @example
-	 * var poly1 = turf.polygon([[
-	 *     [-82.574787, 35.594087],
-	 *     [-82.574787, 35.615581],
-	 *     [-82.545261, 35.615581],
-	 *     [-82.545261, 35.594087],
-	 *     [-82.574787, 35.594087]
-	 * ]], {"fill": "#0f0"});
-	 * var poly2 = turf.polygon([[
-	 *     [-82.560024, 35.585153],
-	 *     [-82.560024, 35.602602],
-	 *     [-82.52964, 35.602602],
-	 *     [-82.52964, 35.585153],
-	 *     [-82.560024, 35.585153]
-	 * ]], {"fill": "#00f"});
-	 *
-	 * var union = turf.union(poly1, poly2);
-	 *
-	 * //addToMap
-	 * var addToMap = [poly1, poly2, union];
-	 */
-	function union$1() {
-	    var arguments$1 = arguments;
 
-	    var reader = new GeoJSONReader();
-	    var result = reader.read(JSON.stringify(arguments[0].geometry));
+	      if (rx_one.test(text.replace(rx_two, "@").replace(rx_three, "]").replace(rx_four, ""))) {
+	        // In the third stage we use the eval function to compile the text into a
+	        // JavaScript structure. The "{" operator is subject to a syntactic ambiguity
+	        // in JavaScript: it can begin a block or an object literal. We wrap the text
+	        // in parens to eliminate the ambiguity.
+	        j = eval("(" + text + ")"); // In the optional fourth stage, we recursively walk the new structure, passing
+	        // each name/value pair to a reviver function for possible transformation.
 
-	    for (var i = 1; i < arguments.length; i++) {
-	        result = UnionOp.union(result, reader.read(JSON.stringify(arguments$1[i].geometry)));
-	    }
+	        return typeof reviver === "function" ? walk({
+	          "": j
+	        }, "") : j;
+	      } // If the text is not JSON parseable, then a SyntaxError is thrown.
 
-	    var writer = new GeoJSONWriter();
-	    result = writer.write(result);
 
-	    return {
-	        type: 'Feature',
-	        geometry: result,
-	        properties: arguments[0].properties
+	      throw new SyntaxError("JSON.parse");
 	    };
+	  }
+	})();
+
+	var json2 = json2Plugin;
+
+	function json2Plugin() {
+	  return {};
 	}
 
-	// Reduce an array of locations into a single GeoJSON feature
-	function _locationReducer(accumulator, location) {
-	  /* eslint-disable no-console, no-invalid-this */
-	  var result;
-	  try {
-	    var resolved = this.resolveLocation(location);
-	    if (!resolved || !resolved.feature) {
-	      console.warn(("Warning:  Couldn't resolve location \"" + location + "\""));
-	      return accumulator;
+	var engine = storeEngine;
+	var storages = all;
+	var plugins = [json2];
+	var store_legacy = engine.createStore(storages, plugins);
+
+	var immutable = extend;
+	var hasOwnProperty = Object.prototype.hasOwnProperty;
+
+	function extend() {
+	  var target = {};
+
+	  for (var i = 0; i < arguments.length; i++) {
+	    var source = arguments[i];
+
+	    for (var key in source) {
+	      if (hasOwnProperty.call(source, key)) {
+	        target[key] = source[key];
+	      }
 	    }
-	    result = !accumulator ? resolved.feature : union$1(accumulator, resolved.feature);
-	  } catch (e) {
-	    console.warn(("Warning:  Error resolving location \"" + location + "\""));
-	    console.warn(e);
-	    result = accumulator;
 	  }
 
-	  return result;
-	  /* eslint-enable no-console, no-invalid-this */
+	  return target;
 	}
 
+	var ohauth = ohauth_1;
+	var resolveUrl = resolveUrl$1.exports;
+	var store = store_legacy;
+	var xtend = immutable; // # osm-auth
+	//
+	// This code is only compatible with IE10+ because the [XDomainRequest](http://bit.ly/LfO7xo)
+	// object, IE<10's idea of [CORS](http://en.wikipedia.org/wiki/Cross-origin_resource_sharing),
+	// does not support custom headers, which this uses everywhere.
 
+	var osmAuth = function osmAuth(o) {
+	  var oauth = {}; // authenticated users will also have a request token secret, but it's
+	  // not used in transactions with the server
 
-	function _cloneDeep(obj) {
-	  return JSON.parse(JSON.stringify(obj));
-	}
+	  oauth.authenticated = function () {
+	    return !!(token('oauth_token') && token('oauth_token_secret'));
+	  };
+
+	  oauth.logout = function () {
+	    token('oauth_token', '');
+	    token('oauth_token_secret', '');
+	    token('oauth_request_token_secret', '');
+	    return oauth;
+	  }; // TODO: detect lack of click event
+
+
+	  oauth.authenticate = function (callback) {
+	    if (oauth.authenticated()) return callback();
+	    oauth.logout(); // ## Getting a request token
+
+	    var params = timenonce(getAuth(o)),
+	        url = o.url + '/oauth/request_token';
+	    params.oauth_signature = ohauth.signature(o.oauth_secret, '', ohauth.baseString('POST', url, params));
+
+	    if (!o.singlepage) {
+	      // Create a 600x550 popup window in the center of the screen
+	      var w = 600,
+	          h = 550,
+	          settings = [['width', w], ['height', h], ['left', screen.width / 2 - w / 2], ['top', screen.height / 2 - h / 2]].map(function (x) {
+	        return x.join('=');
+	      }).join(','),
+	          popup = window.open('about:blank', 'oauth_window', settings);
+	      oauth.popupWindow = popup;
+
+	      if (!popup) {
+	        var error = new Error('Popup was blocked');
+	        error.status = 'popup-blocked';
+	        throw error;
+	      }
+	    } // Request a request token. When this is complete, the popup
+	    // window is redirected to OSM's authorization page.
+
+
+	    ohauth.xhr('POST', url, params, null, {}, reqTokenDone);
+	    o.loading();
 
+	    function reqTokenDone(err, xhr) {
+	      o.done();
+	      if (err) return callback(err);
+	      var resp = ohauth.stringQs(xhr.response);
+	      token('oauth_request_token_secret', resp.oauth_token_secret);
+	      var authorize_url = o.url + '/oauth/authorize?' + ohauth.qsString({
+	        oauth_token: resp.oauth_token,
+	        oauth_callback: resolveUrl(o.landing)
+	      });
 
-	var defaultExport = function defaultExport(fc) {
-	  var this$1 = this;
+	      if (o.singlepage) {
+	        location.href = authorize_url;
+	      } else {
+	        popup.location = authorize_url;
+	      }
+	    } // Called by a function in a landing page, in the popup window. The
+	    // window closes itself.
 
-	  this._cache = {};
 
-	  // process input FeatureCollection
-	  if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
-	    fc.features.forEach(function (feature) {
-	      feature.properties = feature.properties || {};
-	      var props = feature.properties;
+	    window.authComplete = function (token) {
+	      var oauth_token = ohauth.stringQs(token.split('?')[1]);
+	      get_access_token(oauth_token.oauth_token);
+	      delete window.authComplete;
+	    }; // ## Getting an request token
+	    //
+	    // At this point we have an `oauth_token`, brought in from a function
+	    // call on a landing page popup.
 
-	      // get `id` from either `id` or `properties`
-	      var id = feature.id || props.id;
-	      if (!id || !/^\S+\.geojson$/i.test(id)) { return; }
 
-	      // ensure id exists and is lowercase
-	      id = id.toLowerCase();
-	      feature.id = id;
-	      props.id = id;
+	    function get_access_token(oauth_token) {
+	      var url = o.url + '/oauth/access_token',
+	          params = timenonce(getAuth(o)),
+	          request_token_secret = token('oauth_request_token_secret');
+	      params.oauth_token = oauth_token;
+	      params.oauth_signature = ohauth.signature(o.oauth_secret, request_token_secret, ohauth.baseString('POST', url, params)); // ## Getting an access token
+	      //
+	      // The final token required for authentication. At this point
+	      // we have a `request token secret`
 
-	      // ensure area property exists
-	      if (!props.area) {
-	        var area = geojsonArea.geometry(feature.geometry) / 1e6;// m² to km²
-	        props.area = Number(area.toFixed(2));
-	      }
+	      ohauth.xhr('POST', url, params, null, {}, accessTokenDone);
+	      o.loading();
+	    }
 
-	      this$1._cache[id] = feature;
-	    });
-	  }
+	    function accessTokenDone(err, xhr) {
+	      o.done();
+	      if (err) return callback(err);
+	      var access_token = ohauth.stringQs(xhr.response);
+	      token('oauth_token', access_token.oauth_token);
+	      token('oauth_token_secret', access_token.oauth_token_secret);
+	      callback(null, oauth);
+	    }
+	  };
+
+	  oauth.bringPopupWindowToFront = function () {
+	    var brougtPopupToFront = false;
+
+	    try {
+	      // This may cause a cross-origin error:
+	      // `DOMException: Blocked a frame with origin "..." from accessing a cross-origin frame.`
+	      if (oauth.popupWindow && !oauth.popupWindow.closed) {
+	        oauth.popupWindow.focus();
+	        brougtPopupToFront = true;
+	      }
+	    } catch (err) {// Bringing popup window to front failed (probably because of the cross-origin error mentioned above)
+	    }
 
-	  // Replace CountryCoder world geometry to have a polygon covering the world.
-	  var world = _cloneDeep(feature('Q2'));
-	  world.geometry = {
-	    type: 'Polygon',
-	    coordinates: [[[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]]]
+	    return brougtPopupToFront;
 	  };
-	  world.id = 'Q2';
-	  world.properties.id = 'Q2';
-	  world.properties.area = geojsonArea.geometry(world.geometry) / 1e6;// m² to km²
-	  this._cache.Q2 = world;
-	};
 
+	  oauth.bootstrapToken = function (oauth_token, callback) {
+	    // ## Getting an request token
+	    // At this point we have an `oauth_token`, brought in from a function
+	    // call on a landing page popup.
+	    function get_access_token(oauth_token) {
+	      var url = o.url + '/oauth/access_token',
+	          params = timenonce(getAuth(o)),
+	          request_token_secret = token('oauth_request_token_secret');
+	      params.oauth_token = oauth_token;
+	      params.oauth_signature = ohauth.signature(o.oauth_secret, request_token_secret, ohauth.baseString('POST', url, params)); // ## Getting an access token
+	      // The final token required for authentication. At this point
+	      // we have a `request token secret`
 
-	// validateLocation
-	//
-	// Pass a `location` identifier
-	// Returns a result like
-	// {
-	//   type:   'point', 'geojson', or 'countrycoder'
-	//   location:the queried location
-	//   id:      a unique identifier
-	// }
-	//or `null` if the location is invalid
-	//
-	defaultExport.prototype.validateLocation = function validateLocation (location) {
-	  if (Array.isArray(location)) { // a [lon,lat] coordinate pair?
-	    if (location.length === 2 && Number.isFinite(location[0]) && Number.isFinite(location[1]) &&
-	      location[0] >= -180 && location[0] <= 180 && location[1] >= -90 && location[1] <= 90
-	    ) {
-	      var id = '[' + location.toString() + ']';
-	      return { type: 'point', location: location, id: id };
+	      ohauth.xhr('POST', url, params, null, {}, accessTokenDone);
+	      o.loading();
 	    }
 
-	  } else if (typeof location === 'string' && /^\S+\.geojson$/i.test(location)) { // a .geojson filename?
-	    var id$1 = location.toLowerCase();
-	    if (this._cache[id$1]) {
-	      return { type: 'geojson', location: location, id: id$1 };
+	    function accessTokenDone(err, xhr) {
+	      o.done();
+	      if (err) return callback(err);
+	      var access_token = ohauth.stringQs(xhr.response);
+	      token('oauth_token', access_token.oauth_token);
+	      token('oauth_token_secret', access_token.oauth_token_secret);
+	      callback(null, oauth);
 	    }
 
-	  } else if (typeof location === 'string' || typeof location === 'number') { // a country-coder value?
-	    var feature$1 = feature(location);
-	    if (feature$1) {
-	      // Use wikidata QID as the identifier, since that seems to be the only
-	      // property that everything in CountryCoder is guaranteed to have.
-	      var id$2 = feature$1.properties.wikidata;
-	      return { type: 'countrycoder', location: location, id: id$2 };
+	    get_access_token(oauth_token);
+	  }; // # xhr
+	  //
+	  // A single XMLHttpRequest wrapper that does authenticated calls if the
+	  // user has logged in.
+
+
+	  oauth.xhr = function (options, callback) {
+	    if (!oauth.authenticated()) {
+	      if (o.auto) {
+	        return oauth.authenticate(run);
+	      } else {
+	        callback('not authenticated', null);
+	        return;
+	      }
+	    } else {
+	      return run();
 	    }
-	  }
 
-	  return null;
-	};
+	    function run() {
+	      var params = timenonce(getAuth(o)),
+	          oauth_token_secret = token('oauth_token_secret'),
+	          url = options.prefix !== false ? o.url + options.path : options.path,
+	          url_parts = url.replace(/#.*$/, '').split('?', 2),
+	          base_url = url_parts[0],
+	          query = url_parts.length === 2 ? url_parts[1] : ''; // https://tools.ietf.org/html/rfc5849#section-3.4.1.3.1
 
+	      if ((!options.options || !options.options.header || options.options.header['Content-Type'] === 'application/x-www-form-urlencoded') && options.content) {
+	        params = xtend(params, ohauth.stringQs(options.content));
+	      }
 
-	// resolveLocation
-	//
-	// Pass a `location` identifier
-	// Returns a result like
-	// {
-	//   type:    'point', 'geojson', or 'countrycoder'
-	//   location:the queried location
-	//   id:      a unique identifier
-	//   feature: the geojson feature
-	// }
-	//or `null` if the location is invalid
-	//
-	defaultExport.prototype.resolveLocation = function resolveLocation (location) {
-	  var valid = this.validateLocation(location);
-	  if (!valid) { return null; }
-
-	  // return a result from cache if we can
-	  if (this._cache[valid.id]) {
-	    return Object.assign(valid, { feature: this._cache[valid.id] });
-	  }
-
-	  // a [lon,lat] coordinate pair?
-	  if (valid.type === 'point') {
-	    var RADIUS = 25000;// meters
-	    var EDGES = 10;
-	    var PRECISION = 3;
-	    var area = Math.PI * RADIUS * RADIUS / 1e6;   // m² to km²
-	    var feature$1 = this._cache[valid.id] = geojsonPrecision({
-	      type: 'Feature',
-	      id: valid.id,
-	      properties: { id: valid.id, area: Number(area.toFixed(2)) },
-	      geometry: circleToPolygon(location, RADIUS, EDGES)
-	    }, PRECISION);
-	    return Object.assign(valid, { feature: feature$1 });
-
-	  // a .geojson filename?
-	  } else if (valid.type === 'geojson') ; else if (valid.type === 'countrycoder') {
-	    var feature$1$1 = _cloneDeep(feature(valid.id));
-	    var props = feature$1$1.properties;
-
-	    // -> This block of code is weird and requires some explanation. <-
-	    // CountryCoder includes higher level features which are made up of members.
-	    // These features don't have their own geometry, but CountryCoder provides an
-	    // `aggregateFeature` method to combine these members into a MultiPolygon.
-	    // BUT, when we try to actually work with these aggregated MultiPolygons,
-	    // Turf/JSTS gets crashy because of topography bugs.
-	    // SO, we'll aggregate the features ourselves by unioning them together.
-	    // This approach also has the benefit of removing all the internal boaders and
-	    // simplifying the regional polygons a lot.
-	    if (Array.isArray(props.members)) {
-	      var seed = feature$1$1.geometry ? feature$1$1 : null;
-	      var aggregate = props.members.reduce(_locationReducer.bind(this), seed);
-	      feature$1$1.geometry = aggregate.geometry;
-	    }
-
-	    // ensure area property exists
-	    if (!props.area) {
-	      var area$1 = geojsonArea.geometry(feature$1$1.geometry) / 1e6;// m² to km²
-	      props.area = Number(area$1.toFixed(2));
-	    }
-
-	    // ensure id property exists
-	    feature$1$1.id = valid.id;
-	    props.id = valid.id;
-
-	    this._cache[valid.id] = feature$1$1;
-	    return Object.assign(valid, { feature: feature$1$1 });
-	  }
+	      params.oauth_token = token('oauth_token');
+	      params.oauth_signature = ohauth.signature(o.oauth_secret, oauth_token_secret, ohauth.baseString(options.method, base_url, xtend(params, ohauth.stringQs(query))));
+	      return ohauth.xhr(options.method, url, params, options.content, options.options, done);
+	    }
 
-	  return null;
-	};
+	    function done(err, xhr) {
+	      if (err) return callback(err);else if (xhr.responseXML) return callback(err, xhr.responseXML);else return callback(err, xhr.response);
+	    }
+	  }; // pre-authorize this object, if we can just get a token and token_secret
+	  // from the start
 
 
-	// resolveLocationSet
-	//
-	// Pass a `locationSet` Object like:
-	// `{ include: [ Array ], exclude: [ Array ] }`
-	// Returns a stable identifier string of the form:
-	// "+[included]-[excluded]"
-	//
-	defaultExport.prototype.resolveLocationSet = function resolveLocationSet (locationSet) {
-	  locationSet = locationSet || {};
-	  var resolve = this.resolveLocation.bind(this);
-	  var include = (locationSet.include || []).map(resolve).filter(Boolean);
-	  var exclude = (locationSet.exclude || []).map(resolve).filter(Boolean);
+	  oauth.preauth = function (c) {
+	    if (!c) return;
+	    if (c.oauth_token) token('oauth_token', c.oauth_token);
+	    if (c.oauth_token_secret) token('oauth_token_secret', c.oauth_token_secret);
+	    return oauth;
+	  };
 
-	  if (!include.length) {
-	    include = [resolve('Q2')]; // default to 'the world'
-	  }
+	  oauth.options = function (_) {
+	    if (!arguments.length) return o;
+	    o = _;
+	    o.url = o.url || 'https://www.openstreetmap.org';
+	    o.landing = o.landing || 'land.html';
+	    o.singlepage = o.singlepage || false; // Optional loading and loading-done functions for nice UI feedback.
+	    // by default, no-ops
 
-	  // return quickly if it's a single included location..
-	  if (include.length === 1 && exclude.length === 0) {
-	    return include[0].feature;
-	  }
+	    o.loading = o.loading || function () {};
 
-	  // generate stable identifier
-	  include.sort(sortFeatures);
-	  var id = '+[' + include.map(function (d) { return d.id; }).join(',') + ']';
-	  if (exclude.length) {
-	    exclude.sort(sortFeatures);
-	    id += '-[' + exclude.map(function (d) { return d.id; }).join(',') + ']';
-	  }
+	    o.done = o.done || function () {};
+
+	    return oauth.preauth(o);
+	  }; // 'stamp' an authentication object from `getAuth()`
+	  // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
+	  // and timestamp
 
-	  // return cached?
-	  if (this._cache[id]) {
-	    return this._cache[id];
-	  }
 
-	  // calculate unions
-	  var includeGeoJSON = include.map(function (d) { return d.location; }).reduce(_locationReducer.bind(this), null);
-	  var excludeGeoJSON = exclude.map(function (d) { return d.location; }).reduce(_locationReducer.bind(this), null);
+	  function timenonce(o) {
+	    o.oauth_timestamp = ohauth.timestamp();
+	    o.oauth_nonce = ohauth.nonce();
+	    return o;
+	  } // get/set tokens. These are prefixed with the base URL so that `osm-auth`
+	  // can be used with multiple APIs and the keys in `localStorage`
+	  // will not clash
 
-	  // calculate difference, update area and return result
-	  var resultGeoJSON = excludeGeoJSON ? difference(includeGeoJSON, excludeGeoJSON) : includeGeoJSON;
-	  var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6;// m² to km²
-	  resultGeoJSON.id = id;
-	  resultGeoJSON.properties = { id: id, area: Number(area.toFixed(2)) };
 
-	  return this._cache[id] = resultGeoJSON;
+	  var token;
 
+	  if (store.enabled) {
+	    token = function token(x, y) {
+	      if (arguments.length === 1) return store.get(o.url + x);else if (arguments.length === 2) return store.set(o.url + x, y);
+	    };
+	  } else {
+	    var storage = {};
 
-	  // Sorting the location lists is ok because they end up unioned together.
-	  // This sorting makes it possible to generate a deterministic id.
-	  function sortFeatures(a, b) {
-	    var rank = { countrycoder: 1, geojson: 2, point: 3 };
-	    var aRank = rank[a.type];
-	    var bRank = rank[b.type];
+	    token = function token(x, y) {
+	      if (arguments.length === 1) return storage[o.url + x];else if (arguments.length === 2) return storage[o.url + x] = y;
+	    };
+	  } // Get an authentication object. If you just add and remove properties
+	  // from a single object, you'll need to use `delete` to make sure that
+	  // it doesn't contain undesired properties for authentication
 
-	    return (aRank > bRank) ? 1
-	      : (aRank < bRank) ? -1
-	      : a.id.localeCompare(b.id);
-	  }
-	};
 
+	  function getAuth(o) {
+	    return {
+	      oauth_consumer_key: o.oauth_consumer_key,
+	      oauth_signature_method: 'HMAC-SHA1'
+	    };
+	  } // potentially pre-authorize
 
-	defaultExport.prototype.cache = function cache () {
-	  return this._cache;
+
+	  oauth.options(o);
+	  return oauth;
 	};
 
-	var _oci = null;
+	var tiler$2 = utilTiler();
+	var dispatch$2 = dispatch$8('apiStatusChange', 'authLoading', 'authDone', 'change', 'loading', 'loaded', 'loadedNotes');
+	var urlroot = 'https://www.openstreetmap.org';
+	var oauth = osmAuth({
+	  url: urlroot,
+	  oauth_consumer_key: '5A043yRSEugj4DJ5TljuapfnrflWDte8jTOcWLlT',
+	  oauth_secret: 'aB3jKq1TRsCOUrfOIZ6oQMEDmv2ptV76PA54NGLL',
+	  loading: authLoading,
+	  done: authDone
+	}); // hardcode default block of Google Maps
+
+	var _imageryBlocklists = [/.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/];
+	var _tileCache = {
+	  toLoad: {},
+	  loaded: {},
+	  inflight: {},
+	  seen: {},
+	  rtree: new RBush()
+	};
+	var _noteCache = {
+	  toLoad: {},
+	  loaded: {},
+	  inflight: {},
+	  inflightPost: {},
+	  note: {},
+	  closed: {},
+	  rtree: new RBush()
+	};
+	var _userCache = {
+	  toLoad: {},
+	  user: {}
+	};
 
-	function uiSuccess(context) {
-	  var MAXEVENTS = 2;
-	  var dispatch$1 = dispatch('cancel');
-	  var _changeset;
-	  var _location;
-	  ensureOSMCommunityIndex();   // start fetching the data
+	var _cachedApiStatus;
 
+	var _changeset = {};
 
-	  function ensureOSMCommunityIndex() {
-	    var data = _mainFileFetcher;
-	    return Promise.all([ data.get('oci_resources'), data.get('oci_features') ])
-	      .then(function (vals) {
-	        if (_oci) { return _oci; }
-
-	        var ociResources = vals[0].resources;
-	        var loco = new defaultExport(vals[1]);
-	        var ociFeatures = {};
-
-	        Object.values(ociResources).forEach(function (resource) {
-	          var feature = loco.resolveLocationSet(resource.locationSet);
-	          var ociFeature = ociFeatures[feature.id];
-	          if (!ociFeature) {
-	            ociFeature = JSON.parse(JSON.stringify(feature));  // deep clone
-	            ociFeature.properties.resourceIDs = new Set();
-	            ociFeatures[feature.id] = ociFeature;
-	          }
-	          ociFeature.properties.resourceIDs.add(resource.id);
-	        });
+	var _deferred = new Set();
 
-	        return _oci = {
-	          features: ociFeatures,
-	          resources: ociResources,
-	          query: whichPolygon_1({ type: 'FeatureCollection', features: Object.values(ociFeatures) })
-	        };
-	      });
-	  }
+	var _connectionID = 1;
+	var _tileZoom = 16;
+	var _noteZoom = 12;
+
+	var _rateLimitError;
 
+	var _userChangesets;
 
-	  // string-to-date parsing in JavaScript is weird
-	  function parseEventDate(when) {
-	    if (!when) { return; }
+	var _userDetails;
 
-	    var raw = when.trim();
-	    if (!raw) { return; }
+	var _off; // set a default but also load this from the API status
 
-	    if (!/Z$/.test(raw)) {   // if no trailing 'Z', add one
-	      raw += 'Z';            // this forces date to be parsed as a UTC date
-	    }
 
-	    var parsed = new Date(raw);
-	    return new Date(parsed.toUTCString().substr(0, 25));  // convert to local timezone
+	var _maxWayNodes = 2000;
+
+	function authLoading() {
+	  dispatch$2.call('authLoading');
+	}
+
+	function authDone() {
+	  dispatch$2.call('authDone');
+	}
+
+	function abortRequest$2(controllerOrXHR) {
+	  if (controllerOrXHR) {
+	    controllerOrXHR.abort();
 	  }
+	}
 
+	function hasInflightRequests(cache) {
+	  return Object.keys(cache.inflight).length;
+	}
 
-	  function success(selection) {
-	    var header = selection
-	      .append('div')
-	      .attr('class', 'header fillL');
-
-	    header
-	      .append('h3')
-	      .text(_t('success.just_edited'));
-
-	    header
-	      .append('button')
-	      .attr('class', 'close')
-	      .on('click', function () { return dispatch$1.call('cancel'); })
-	      .call(svgIcon('#iD-icon-close'));
-
-	    var body = selection
-	      .append('div')
-	      .attr('class', 'body save-success fillL');
-
-	    var summary = body
-	      .append('div')
-	      .attr('class', 'save-summary');
-
-	    summary
-	      .append('h3')
-	      .text(_t('success.thank_you' + (_location ? '_location' : ''), { where: _location }));
-
-	    summary
-	      .append('p')
-	      .text(_t('success.help_html'))
-	      .append('a')
-	      .attr('class', 'link-out')
-	      .attr('target', '_blank')
-	      .attr('tabindex', -1)
-	      .attr('href', _t('success.help_link_url'))
-	      .call(svgIcon('#iD-icon-out-link', 'inline'))
-	      .append('span')
-	      .text(_t('success.help_link_text'));
+	function abortUnwantedRequests(cache, visibleTiles) {
+	  Object.keys(cache.inflight).forEach(function (k) {
+	    if (cache.toLoad[k]) return;
+	    if (visibleTiles.find(function (tile) {
+	      return k === tile.id;
+	    })) return;
+	    abortRequest$2(cache.inflight[k]);
+	    delete cache.inflight[k];
+	  });
+	}
 
-	    var osm = context.connection();
-	    if (!osm) { return; }
+	function getLoc(attrs) {
+	  var lon = attrs.lon && attrs.lon.value;
+	  var lat = attrs.lat && attrs.lat.value;
+	  return [parseFloat(lon), parseFloat(lat)];
+	}
 
-	    var changesetURL = osm.changesetURL(_changeset.id);
+	function getNodes(obj) {
+	  var elems = obj.getElementsByTagName('nd');
+	  var nodes = new Array(elems.length);
 
-	    var table = summary
-	      .append('table')
-	      .attr('class', 'summary-table');
-
-	    var row = table
-	      .append('tr')
-	      .attr('class', 'summary-row');
-
-	    row
-	      .append('td')
-	      .attr('class', 'cell-icon summary-icon')
-	      .append('a')
-	      .attr('target', '_blank')
-	      .attr('href', changesetURL)
-	      .append('svg')
-	      .attr('class', 'logo-small')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-osm');
-
-	    var summaryDetail = row
-	      .append('td')
-	      .attr('class', 'cell-detail summary-detail');
-
-	    summaryDetail
-	      .append('a')
-	      .attr('class', 'cell-detail summary-view-on-osm')
-	      .attr('target', '_blank')
-	      .attr('href', changesetURL)
-	      .text(_t('success.view_on_osm'));
-
-	    summaryDetail
-	      .append('div')
-	      .html(_t('success.changeset_id', {
-	        changeset_id: ("<a href=\"" + changesetURL + "\" target=\"_blank\">" + (_changeset.id) + "</a>")
-	      }));
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    nodes[i] = 'n' + elems[i].attributes.ref.value;
+	  }
 
+	  return nodes;
+	}
 
-	    // Get OSM community index features intersecting the map..
-	    ensureOSMCommunityIndex()
-	      .then(function (oci) {
-	        var communities = [];
-	        var properties = oci.query(context.map().center(), true) || [];
-
-	        // Gather the communities from the result
-	        properties.forEach(function (props) {
-	          var resourceIDs = Array.from(props.resourceIDs);
-	          resourceIDs.forEach(function (resourceID) {
-	            var resource = oci.resources[resourceID];
-	            communities.push({
-	              area: props.area || Infinity,
-	              order: resource.order || 0,
-	              resource: resource
-	            });
-	          });
-	        });
+	function getNodesJSON(obj) {
+	  var elems = obj.nodes;
+	  var nodes = new Array(elems.length);
+
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    nodes[i] = 'n' + elems[i];
+	  }
 
-	        // sort communities by feature area ascending, community order descending
-	        communities.sort(function (a, b) { return a.area - b.area || b.order - a.order; });
+	  return nodes;
+	}
 
-	        body
-	          .call(showCommunityLinks, communities.map(function (c) { return c.resource; }));
-	      });
+	function getTags(obj) {
+	  var elems = obj.getElementsByTagName('tag');
+	  var tags = {};
+
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    var attrs = elems[i].attributes;
+	    tags[attrs.k.value] = attrs.v.value;
 	  }
 
+	  return tags;
+	}
 
-	  function showCommunityLinks(selection, resources) {
-	    var communityLinks = selection
-	      .append('div')
-	      .attr('class', 'save-communityLinks');
-
-	    communityLinks
-	      .append('h3')
-	      .text(_t('success.like_osm'));
-
-	    var table = communityLinks
-	      .append('table')
-	      .attr('class', 'community-table');
-
-	    var row = table.selectAll('.community-row')
-	      .data(resources);
-
-	    var rowEnter = row.enter()
-	      .append('tr')
-	      .attr('class', 'community-row');
-
-	    rowEnter
-	      .append('td')
-	      .attr('class', 'cell-icon community-icon')
-	      .append('a')
-	      .attr('target', '_blank')
-	      .attr('href', function (d) { return d.url; })
-	      .append('svg')
-	      .attr('class', 'logo-small')
-	      .append('use')
-	      .attr('xlink:href', function (d) { return ("#community-" + (d.type)); });
-
-	    var communityDetail = rowEnter
-	      .append('td')
-	      .attr('class', 'cell-detail community-detail');
-
-	    communityDetail
-	      .each(showCommunityDetails);
-
-	    communityLinks
-	      .append('div')
-	      .attr('class', 'community-missing')
-	      .text(_t('success.missing'))
-	      .append('a')
-	      .attr('class', 'link-out')
-	      .attr('target', '_blank')
-	      .attr('tabindex', -1)
-	      .call(svgIcon('#iD-icon-out-link', 'inline'))
-	      .attr('href', 'https://github.com/osmlab/osm-community-index/issues')
-	      .append('span')
-	      .text(_t('success.tell_us'));
+	function getMembers(obj) {
+	  var elems = obj.getElementsByTagName('member');
+	  var members = new Array(elems.length);
+
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    var attrs = elems[i].attributes;
+	    members[i] = {
+	      id: attrs.type.value[0] + attrs.ref.value,
+	      type: attrs.type.value,
+	      role: attrs.role.value
+	    };
 	  }
 
+	  return members;
+	}
+
+	function getMembersJSON(obj) {
+	  var elems = obj.members;
+	  var members = new Array(elems.length);
 
-	  function showCommunityDetails(d) {
-	    var selection = select(this);
-	    var communityID = d.id;
-	    var replacements = {
-	      url: linkify(d.url),
-	      signupUrl: linkify(d.signupUrl || d.url)
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    var attrs = elems[i];
+	    members[i] = {
+	      id: attrs.type[0] + attrs.ref,
+	      type: attrs.type,
+	      role: attrs.role
 	    };
+	  }
 
-	    selection
-	      .append('div')
-	      .attr('class', 'community-name')
-	      .append('a')
-	      .attr('target', '_blank')
-	      .attr('href', d.url)
-	      .text(_t(("community." + (d.id) + ".name")));
-
-	    var descriptionHTML = _t(("community." + (d.id) + ".description"), replacements);
-
-	    if (d.type === 'reddit') {   // linkify subreddits  #4997
-	      descriptionHTML = descriptionHTML
-	        .replace(/(\/r\/\w*\/*)/i, function (match) { return linkify(d.url, match); });
-	    }
-
-	    selection
-	      .append('div')
-	      .attr('class', 'community-description')
-	      .html(descriptionHTML);
-
-	    if (d.extendedDescription || (d.languageCodes && d.languageCodes.length)) {
-	      selection
-	        .append('div')
-	        .call(uiDisclosure(context, ("community-more-" + (d.id)), false)
-	          .expanded(false)
-	          .updatePreference(false)
-	          .title(_t('success.more'))
-	          .content(showMore)
-	        );
-	    }
+	  return members;
+	}
 
-	    var nextEvents = (d.events || [])
-	      .map(function (event) {
-	        event.date = parseEventDate(event.when);
-	        return event;
-	      })
-	      .filter(function (event) {      // date is valid and future (or today)
-	        var t = event.date.getTime();
-	        var now = (new Date()).setHours(0,0,0,0);
-	        return !isNaN(t) && t >= now;
-	      })
-	      .sort(function (a, b) {       // sort by date ascending
-	        return a.date < b.date ? -1 : a.date > b.date ? 1 : 0;
-	      })
-	      .slice(0, MAXEVENTS);   // limit number of events shown
+	function getVisible(attrs) {
+	  return !attrs.visible || attrs.visible.value !== 'false';
+	}
 
-	    if (nextEvents.length) {
-	      selection
-	        .append('div')
-	        .call(uiDisclosure(context, ("community-events-" + (d.id)), false)
-	          .expanded(false)
-	          .updatePreference(false)
-	          .title(_t('success.events'))
-	          .content(showNextEvents)
-	        )
-	        .select('.hide-toggle')
-	        .append('span')
-	        .attr('class', 'badge-text')
-	        .text(nextEvents.length);
-	    }
+	function parseComments(comments) {
+	  var parsedComments = []; // for each comment
 
+	  for (var i = 0; i < comments.length; i++) {
+	    var comment = comments[i];
 
-	    function showMore(selection) {
-	      var more = selection.selectAll('.community-more')
-	        .data([0]);
+	    if (comment.nodeName === 'comment') {
+	      var childNodes = comment.childNodes;
+	      var parsedComment = {};
 
-	      var moreEnter = more.enter()
-	        .append('div')
-	        .attr('class', 'community-more');
+	      for (var j = 0; j < childNodes.length; j++) {
+	        var node = childNodes[j];
+	        var nodeName = node.nodeName;
+	        if (nodeName === '#text') continue;
+	        parsedComment[nodeName] = node.textContent;
 
-	      if (d.extendedDescription) {
-	        moreEnter
-	          .append('div')
-	          .attr('class', 'community-extended-description')
-	          .html(_t(("community." + (d.id) + ".extendedDescription"), replacements));
-	      }
+	        if (nodeName === 'uid') {
+	          var uid = node.textContent;
 
-	      if (d.languageCodes && d.languageCodes.length) {
-	        var languageList = d.languageCodes
-	          .map(function (code) { return _mainLocalizer.languageName(code); })
-	          .join(', ');
+	          if (uid && !_userCache.user[uid]) {
+	            _userCache.toLoad[uid] = true;
+	          }
+	        }
+	      }
 
-	        moreEnter
-	          .append('div')
-	          .attr('class', 'community-languages')
-	          .text(_t('success.languages', { languages: languageList }));
+	      if (parsedComment) {
+	        parsedComments.push(parsedComment);
 	      }
 	    }
+	  }
 
+	  return parsedComments;
+	}
 
-	    function showNextEvents(selection) {
-	      var events = selection
-	        .append('div')
-	        .attr('class', 'community-events');
-
-	      var item = events.selectAll('.community-event')
-	        .data(nextEvents);
+	function encodeNoteRtree(note) {
+	  return {
+	    minX: note.loc[0],
+	    minY: note.loc[1],
+	    maxX: note.loc[0],
+	    maxY: note.loc[1],
+	    data: note
+	  };
+	}
 
-	      var itemEnter = item.enter()
-	        .append('div')
-	        .attr('class', 'community-event');
+	var jsonparsers = {
+	  node: function nodeData(obj, uid) {
+	    return new osmNode({
+	      id: uid,
+	      visible: typeof obj.visible === 'boolean' ? obj.visible : true,
+	      version: obj.version && obj.version.toString(),
+	      changeset: obj.changeset && obj.changeset.toString(),
+	      timestamp: obj.timestamp,
+	      user: obj.user,
+	      uid: obj.uid && obj.uid.toString(),
+	      loc: [parseFloat(obj.lon), parseFloat(obj.lat)],
+	      tags: obj.tags
+	    });
+	  },
+	  way: function wayData(obj, uid) {
+	    return new osmWay({
+	      id: uid,
+	      visible: typeof obj.visible === 'boolean' ? obj.visible : true,
+	      version: obj.version && obj.version.toString(),
+	      changeset: obj.changeset && obj.changeset.toString(),
+	      timestamp: obj.timestamp,
+	      user: obj.user,
+	      uid: obj.uid && obj.uid.toString(),
+	      tags: obj.tags,
+	      nodes: getNodesJSON(obj)
+	    });
+	  },
+	  relation: function relationData(obj, uid) {
+	    return new osmRelation({
+	      id: uid,
+	      visible: typeof obj.visible === 'boolean' ? obj.visible : true,
+	      version: obj.version && obj.version.toString(),
+	      changeset: obj.changeset && obj.changeset.toString(),
+	      timestamp: obj.timestamp,
+	      user: obj.user,
+	      uid: obj.uid && obj.uid.toString(),
+	      tags: obj.tags,
+	      members: getMembersJSON(obj)
+	    });
+	  },
+	  user: function parseUser(obj, uid) {
+	    return {
+	      id: uid,
+	      display_name: obj.display_name,
+	      account_created: obj.account_created,
+	      image_url: obj.img && obj.img.href,
+	      changesets_count: obj.changesets && obj.changesets.count && obj.changesets.count.toString() || '0',
+	      active_blocks: obj.blocks && obj.blocks.received && obj.blocks.received.active && obj.blocks.received.active.toString() || '0'
+	    };
+	  }
+	};
 
-	      itemEnter
-	        .append('div')
-	        .attr('class', 'community-event-name')
-	        .append('a')
-	        .attr('target', '_blank')
-	        .attr('href', function (d) { return d.url; })
-	        .text(function (d) {
-	          var name = d.name;
-	          if (d.i18n && d.id) {
-	            name = _t(("community." + communityID + ".events." + (d.id) + ".name"), { default: name });
-	          }
-	          return name;
-	        });
+	function parseJSON(payload, callback, options) {
+	  options = Object.assign({
+	    skipSeen: true
+	  }, options);
+
+	  if (!payload) {
+	    return callback({
+	      message: 'No JSON',
+	      status: -1
+	    });
+	  }
 
-	      itemEnter
-	        .append('div')
-	        .attr('class', 'community-event-when')
-	        .text(function (d) {
-	          var options = { weekday: 'short', day: 'numeric', month: 'short', year: 'numeric' };
-	          if (d.date.getHours() || d.date.getMinutes()) {   // include time if it has one
-	            options.hour = 'numeric';
-	            options.minute = 'numeric';
-	          }
-	          return d.date.toLocaleString(_mainLocalizer.localeCode(), options);
-	        });
+	  var json = payload;
+	  if (_typeof(json) !== 'object') json = JSON.parse(payload);
+	  if (!json.elements) return callback({
+	    message: 'No JSON',
+	    status: -1
+	  });
+	  var children = json.elements;
+	  var handle = window.requestIdleCallback(function () {
+	    _deferred["delete"](handle);
 
-	      itemEnter
-	        .append('div')
-	        .attr('class', 'community-event-where')
-	        .text(function (d) {
-	          var where = d.where;
-	          if (d.i18n && d.id) {
-	            where = _t(("community." + communityID + ".events." + (d.id) + ".where"), { default: where });
-	          }
-	          return where;
-	        });
+	    var results = [];
+	    var result;
 
-	      itemEnter
-	        .append('div')
-	        .attr('class', 'community-event-description')
-	        .text(function (d) {
-	          var description = d.description;
-	          if (d.i18n && d.id) {
-	            description = _t(("community." + communityID + ".events." + (d.id) + ".description"), { default: description });
-	          }
-	          return description;
-	        });
+	    for (var i = 0; i < children.length; i++) {
+	      result = parseChild(children[i]);
+	      if (result) results.push(result);
 	    }
 
+	    callback(null, results);
+	  });
+
+	  _deferred.add(handle);
 
-	    function linkify(url, text) {
-	      text = text || url;
-	      return ("<a target=\"_blank\" href=\"" + url + "\">" + text + "</a>");
+	  function parseChild(child) {
+	    var parser = jsonparsers[child.type];
+	    if (!parser) return null;
+	    var uid;
+	    uid = osmEntity.id.fromOSM(child.type, child.id);
+
+	    if (options.skipSeen) {
+	      if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
+
+	      _tileCache.seen[uid] = true;
 	    }
+
+	    return parser(child, uid);
+	  }
+	}
+
+	function parseUserJSON(payload, callback, options) {
+	  options = Object.assign({
+	    skipSeen: true
+	  }, options);
+
+	  if (!payload) {
+	    return callback({
+	      message: 'No JSON',
+	      status: -1
+	    });
 	  }
 
+	  var json = payload;
+	  if (_typeof(json) !== 'object') json = JSON.parse(payload);
+	  if (!json.users && !json.user) return callback({
+	    message: 'No JSON',
+	    status: -1
+	  });
+	  var objs = json.users || [json];
+	  var handle = window.requestIdleCallback(function () {
+	    _deferred["delete"](handle);
 
-	  success.changeset = function(val) {
-	    if (!arguments.length) { return _changeset; }
-	    _changeset = val;
-	    return success;
-	  };
+	    var results = [];
+	    var result;
 
+	    for (var i = 0; i < objs.length; i++) {
+	      result = parseObj(objs[i]);
+	      if (result) results.push(result);
+	    }
 
-	  success.location = function(val) {
-	    if (!arguments.length) { return _location; }
-	    _location = val;
-	    return success;
-	  };
+	    callback(null, results);
+	  });
 
+	  _deferred.add(handle);
 
-	  return utilRebind(success, dispatch$1, 'on');
-	}
+	  function parseObj(obj) {
+	    var uid = obj.user.id && obj.user.id.toString();
 
-	function modeSave(context) {
-	    var mode = { id: 'save' };
-	    var keybinding = utilKeybinding('modeSave');
+	    if (options.skipSeen && _userCache.user[uid]) {
+	      delete _userCache.toLoad[uid];
+	      return null;
+	    }
 
-	    var commit = uiCommit(context)
-	        .on('cancel', cancel);
-	    var _conflictsUi; // uiConflicts
+	    var user = jsonparsers.user(obj.user, uid);
+	    _userCache.user[uid] = user;
+	    delete _userCache.toLoad[uid];
+	    return user;
+	  }
+	}
 
-	    var _location;
-	    var _success;
+	var parsers = {
+	  node: function nodeData(obj, uid) {
+	    var attrs = obj.attributes;
+	    return new osmNode({
+	      id: uid,
+	      visible: getVisible(attrs),
+	      version: attrs.version.value,
+	      changeset: attrs.changeset && attrs.changeset.value,
+	      timestamp: attrs.timestamp && attrs.timestamp.value,
+	      user: attrs.user && attrs.user.value,
+	      uid: attrs.uid && attrs.uid.value,
+	      loc: getLoc(attrs),
+	      tags: getTags(obj)
+	    });
+	  },
+	  way: function wayData(obj, uid) {
+	    var attrs = obj.attributes;
+	    return new osmWay({
+	      id: uid,
+	      visible: getVisible(attrs),
+	      version: attrs.version.value,
+	      changeset: attrs.changeset && attrs.changeset.value,
+	      timestamp: attrs.timestamp && attrs.timestamp.value,
+	      user: attrs.user && attrs.user.value,
+	      uid: attrs.uid && attrs.uid.value,
+	      tags: getTags(obj),
+	      nodes: getNodes(obj)
+	    });
+	  },
+	  relation: function relationData(obj, uid) {
+	    var attrs = obj.attributes;
+	    return new osmRelation({
+	      id: uid,
+	      visible: getVisible(attrs),
+	      version: attrs.version.value,
+	      changeset: attrs.changeset && attrs.changeset.value,
+	      timestamp: attrs.timestamp && attrs.timestamp.value,
+	      user: attrs.user && attrs.user.value,
+	      uid: attrs.uid && attrs.uid.value,
+	      tags: getTags(obj),
+	      members: getMembers(obj)
+	    });
+	  },
+	  note: function parseNote(obj, uid) {
+	    var attrs = obj.attributes;
+	    var childNodes = obj.childNodes;
+	    var props = {};
+	    props.id = uid;
+	    props.loc = getLoc(attrs); // if notes are coincident, move them apart slightly
 
-	    var uploader = context.uploader()
-	        .on('saveStarted.modeSave', function() {
-	            keybindingOff();
-	        })
-	        // fire off some async work that we want to be ready later
-	        .on('willAttemptUpload.modeSave', prepareForSuccess)
-	        .on('progressChanged.modeSave', showProgress)
-	        .on('resultNoChanges.modeSave', function() {
-	            cancel();
-	        })
-	        .on('resultErrors.modeSave', showErrors)
-	        .on('resultConflicts.modeSave', showConflicts)
-	        .on('resultSuccess.modeSave', showSuccess);
+	    var coincident = false;
+	    var epsilon = 0.00001;
 
+	    do {
+	      if (coincident) {
+	        props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
+	      }
 
-	    function cancel() {
-	        context.enter(modeBrowse(context));
-	    }
+	      var bbox = geoExtent(props.loc).bbox();
+	      coincident = _noteCache.rtree.search(bbox).length;
+	    } while (coincident); // parse note contents
 
 
-	    function showProgress(num, total) {
-	        var modal = context.container().select('.loading-modal .modal-section');
-	        var progress = modal.selectAll('.progress')
-	            .data([0]);
+	    for (var i = 0; i < childNodes.length; i++) {
+	      var node = childNodes[i];
+	      var nodeName = node.nodeName;
+	      if (nodeName === '#text') continue; // if the element is comments, parse the comments
 
-	        // enter/update
-	        progress.enter()
-	            .append('div')
-	            .attr('class', 'progress')
-	            .merge(progress)
-	            .text(_t('save.conflict_progress', { num: num, total: total }));
+	      if (nodeName === 'comments') {
+	        props[nodeName] = parseComments(node.childNodes);
+	      } else {
+	        props[nodeName] = node.textContent;
+	      }
 	    }
 
+	    var note = new osmNote(props);
+	    var item = encodeNoteRtree(note);
+	    _noteCache.note[note.id] = note;
 
-	    function showConflicts(changeset, conflicts, origChanges) {
+	    _noteCache.rtree.insert(item);
 
-	        var selection = context.container()
-	            .select('.sidebar')
-	            .append('div')
-	            .attr('class','sidebar-component');
-
-	        context.container().selectAll('.main-content')
-	            .classed('active', true)
-	            .classed('inactive', false);
-
-	        _conflictsUi = uiConflicts(context)
-	            .conflictList(conflicts)
-	            .origChanges(origChanges)
-	            .on('cancel', function() {
-	                context.container().selectAll('.main-content')
-	                    .classed('active', false)
-	                    .classed('inactive', true);
-	                selection.remove();
-	                keybindingOn();
-
-	                uploader.cancelConflictResolution();
-	            })
-	            .on('save', function() {
-	                context.container().selectAll('.main-content')
-	                    .classed('active', false)
-	                    .classed('inactive', true);
-	                selection.remove();
-
-	                uploader.processResolvedConflicts(changeset);
-	            });
+	    return note;
+	  },
+	  user: function parseUser(obj, uid) {
+	    var attrs = obj.attributes;
+	    var user = {
+	      id: uid,
+	      display_name: attrs.display_name && attrs.display_name.value,
+	      account_created: attrs.account_created && attrs.account_created.value,
+	      changesets_count: '0',
+	      active_blocks: '0'
+	    };
+	    var img = obj.getElementsByTagName('img');
 
-	        selection.call(_conflictsUi);
+	    if (img && img[0] && img[0].getAttribute('href')) {
+	      user.image_url = img[0].getAttribute('href');
 	    }
 
+	    var changesets = obj.getElementsByTagName('changesets');
 
-	    function showErrors(errors) {
-	        keybindingOn();
+	    if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
+	      user.changesets_count = changesets[0].getAttribute('count');
+	    }
 
-	        var selection = uiConfirm(context.container());
-	        selection
-	            .select('.modal-section.header')
-	            .append('h3')
-	            .text(_t('save.error'));
+	    var blocks = obj.getElementsByTagName('blocks');
 
-	        addErrors(selection, errors);
-	        selection.okButton();
-	    }
+	    if (blocks && blocks[0]) {
+	      var received = blocks[0].getElementsByTagName('received');
 
+	      if (received && received[0] && received[0].getAttribute('active')) {
+	        user.active_blocks = received[0].getAttribute('active');
+	      }
+	    }
 
-	    function addErrors(selection, data) {
-	        var message = selection
-	            .select('.modal-section.message-text');
+	    _userCache.user[uid] = user;
+	    delete _userCache.toLoad[uid];
+	    return user;
+	  }
+	};
 
-	        var items = message
-	            .selectAll('.error-container')
-	            .data(data);
+	function parseXML(xml, callback, options) {
+	  options = Object.assign({
+	    skipSeen: true
+	  }, options);
+
+	  if (!xml || !xml.childNodes) {
+	    return callback({
+	      message: 'No XML',
+	      status: -1
+	    });
+	  }
 
-	        var enter = items.enter()
-	            .append('div')
-	            .attr('class', 'error-container');
-
-	        enter
-	            .append('a')
-	            .attr('class', 'error-description')
-	            .attr('href', '#')
-	            .classed('hide-toggle', true)
-	            .text(function(d) { return d.msg || _t('save.unknown_error_details'); })
-	            .on('click', function() {
-	                event.preventDefault();
-
-	                var error = select(this);
-	                var detail = select(this.nextElementSibling);
-	                var exp = error.classed('expanded');
-
-	                detail.style('display', exp ? 'none' : 'block');
-	                error.classed('expanded', !exp);
-	            });
+	  var root = xml.childNodes[0];
+	  var children = root.childNodes;
+	  var handle = window.requestIdleCallback(function () {
+	    _deferred["delete"](handle);
 
-	        var details = enter
-	            .append('div')
-	            .attr('class', 'error-detail-container')
-	            .style('display', 'none');
-
-	        details
-	            .append('ul')
-	            .attr('class', 'error-detail-list')
-	            .selectAll('li')
-	            .data(function(d) { return d.details || []; })
-	            .enter()
-	            .append('li')
-	            .attr('class', 'error-detail-item')
-	            .text(function(d) { return d; });
+	    var results = [];
+	    var result;
 
-	        items.exit()
-	            .remove();
+	    for (var i = 0; i < children.length; i++) {
+	      result = parseChild(children[i]);
+	      if (result) results.push(result);
 	    }
 
+	    callback(null, results);
+	  });
 
-	    function showSuccess(changeset) {
-	        commit.reset();
-
-	        var ui = _success
-	            .changeset(changeset)
-	            .location(_location)
-	            .on('cancel', function() { context.ui().sidebar.hide(); });
+	  _deferred.add(handle);
 
-	        context.enter(modeBrowse(context).sidebar(ui));
-	    }
+	  function parseChild(child) {
+	    var parser = parsers[child.nodeName];
+	    if (!parser) return null;
+	    var uid;
 
+	    if (child.nodeName === 'user') {
+	      uid = child.attributes.id.value;
 
-	    function keybindingOn() {
-	        select(document)
-	            .call(keybinding.on('⎋', cancel, true));
-	    }
+	      if (options.skipSeen && _userCache.user[uid]) {
+	        delete _userCache.toLoad[uid];
+	        return null;
+	      }
+	    } else if (child.nodeName === 'note') {
+	      uid = child.getElementsByTagName('id')[0].textContent;
+	    } else {
+	      uid = osmEntity.id.fromOSM(child.nodeName, child.attributes.id.value);
 
+	      if (options.skipSeen) {
+	        if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
 
-	    function keybindingOff() {
-	        select(document)
-	            .call(keybinding.unbind);
+	        _tileCache.seen[uid] = true;
+	      }
 	    }
 
+	    return parser(child, uid);
+	  }
+	} // replace or remove note from rtree
 
-	    // Reverse geocode current map location so we can display a message on
-	    // the success screen like "Thank you for editing around place, region."
-	    function prepareForSuccess() {
-	        _success = uiSuccess(context);
-	        _location = null;
-	        if (!services.geocoder) { return; }
 
-	        services.geocoder.reverse(context.map().center(), function(err, result) {
-	            if (err || !result || !result.address) { return; }
+	function updateRtree(item, replace) {
+	  _noteCache.rtree.remove(item, function isEql(a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
-	            var addr = result.address;
-	            var place = (addr && (addr.town || addr.city || addr.county)) || '';
-	            var region = (addr && (addr.state || addr.country)) || '';
-	            var separator = (place && region) ? _t('success.thank_you_where.separator') : '';
+	  if (replace) {
+	    _noteCache.rtree.insert(item);
+	  }
+	}
 
-	            _location = _t('success.thank_you_where.format',
-	                { place: place, separator: separator, region: region }
-	            );
-	        });
+	function wrapcb(thisArg, callback, cid) {
+	  return function (err, result) {
+	    if (err) {
+	      // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
+	      if (err.status === 400 || err.status === 401 || err.status === 403) {
+	        thisArg.logout();
+	      }
+
+	      return callback.call(thisArg, err);
+	    } else if (thisArg.getConnectionId() !== cid) {
+	      return callback.call(thisArg, {
+	        message: 'Connection Switched',
+	        status: -1
+	      });
+	    } else {
+	      return callback.call(thisArg, err, result);
 	    }
+	  };
+	}
 
+	var serviceOsm = {
+	  init: function init() {
+	    utilRebind(this, dispatch$2, 'on');
+	  },
+	  reset: function reset() {
+	    Array.from(_deferred).forEach(function (handle) {
+	      window.cancelIdleCallback(handle);
 
-	    mode.selectedIDs = function() {
-	        return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
+	      _deferred["delete"](handle);
+	    });
+	    _connectionID++;
+	    _userChangesets = undefined;
+	    _userDetails = undefined;
+	    _rateLimitError = undefined;
+	    Object.values(_tileCache.inflight).forEach(abortRequest$2);
+	    Object.values(_noteCache.inflight).forEach(abortRequest$2);
+	    Object.values(_noteCache.inflightPost).forEach(abortRequest$2);
+	    if (_changeset.inflight) abortRequest$2(_changeset.inflight);
+	    _tileCache = {
+	      toLoad: {},
+	      loaded: {},
+	      inflight: {},
+	      seen: {},
+	      rtree: new RBush()
+	    };
+	    _noteCache = {
+	      toLoad: {},
+	      loaded: {},
+	      inflight: {},
+	      inflightPost: {},
+	      note: {},
+	      closed: {},
+	      rtree: new RBush()
 	    };
+	    _userCache = {
+	      toLoad: {},
+	      user: {}
+	    };
+	    _cachedApiStatus = undefined;
+	    _changeset = {};
+	    return this;
+	  },
+	  getConnectionId: function getConnectionId() {
+	    return _connectionID;
+	  },
+	  changesetURL: function changesetURL(changesetID) {
+	    return urlroot + '/changeset/' + changesetID;
+	  },
+	  changesetsURL: function changesetsURL(center, zoom) {
+	    var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
+	    return urlroot + '/history#map=' + Math.floor(zoom) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
+	  },
+	  entityURL: function entityURL(entity) {
+	    return urlroot + '/' + entity.type + '/' + entity.osmId();
+	  },
+	  historyURL: function historyURL(entity) {
+	    return urlroot + '/' + entity.type + '/' + entity.osmId() + '/history';
+	  },
+	  userURL: function userURL(username) {
+	    return urlroot + '/user/' + encodeURIComponent(username);
+	  },
+	  noteURL: function noteURL(note) {
+	    return urlroot + '/note/' + note.id;
+	  },
+	  noteReportURL: function noteReportURL(note) {
+	    return urlroot + '/reports/new?reportable_type=Note&reportable_id=' + note.id;
+	  },
+	  // Generic method to load data from the OSM API
+	  // Can handle either auth or unauth calls.
+	  loadFromAPI: function loadFromAPI(path, callback, options) {
+	    options = Object.assign({
+	      skipSeen: true
+	    }, options);
+	    var that = this;
+	    var cid = _connectionID;
 
+	    function done(err, payload) {
+	      if (that.getConnectionId() !== cid) {
+	        if (callback) callback({
+	          message: 'Connection Switched',
+	          status: -1
+	        });
+	        return;
+	      }
 
-	    mode.enter = function() {
-	        // Show sidebar
-	        context.ui().sidebar.expand();
+	      var isAuthenticated = that.authenticated(); // 400 Bad Request, 401 Unauthorized, 403 Forbidden
+	      // Logout and retry the request..
 
-	        function done() {
-	            context.ui().sidebar.show(commit);
+	      if (isAuthenticated && err && err.status && (err.status === 400 || err.status === 401 || err.status === 403)) {
+	        that.logout();
+	        that.loadFromAPI(path, callback, options); // else, no retry..
+	      } else {
+	        // 509 Bandwidth Limit Exceeded, 429 Too Many Requests
+	        // Set the rateLimitError flag and trigger a warning..
+	        if (!isAuthenticated && !_rateLimitError && err && err.status && (err.status === 509 || err.status === 429)) {
+	          _rateLimitError = err;
+	          dispatch$2.call('change');
+	          that.reloadApiStatus();
+	        } else if (err && _cachedApiStatus === 'online' || !err && _cachedApiStatus !== 'online') {
+	          // If the response's error state doesn't match the status,
+	          // it's likely we lost or gained the connection so reload the status
+	          that.reloadApiStatus();
+	        }
+
+	        if (callback) {
+	          if (err) {
+	            return callback(err);
+	          } else {
+	            if (path.indexOf('.json') !== -1) {
+	              return parseJSON(payload, callback, options);
+	            } else {
+	              return parseXML(payload, callback, options);
+	            }
+	          }
 	        }
+	      }
+	    }
 
-	        keybindingOn();
-
-	        context.container().selectAll('.main-content')
-	            .classed('active', false)
-	            .classed('inactive', true);
+	    if (this.authenticated()) {
+	      return oauth.xhr({
+	        method: 'GET',
+	        path: path
+	      }, done);
+	    } else {
+	      var url = urlroot + path;
+	      var controller = new AbortController();
+	      var fn;
 
-	        var osm = context.connection();
-	        if (!osm) {
-	            cancel();
-	            return;
-	        }
+	      if (path.indexOf('.json') !== -1) {
+	        fn = d3_json;
+	      } else {
+	        fn = d3_xml;
+	      }
 
-	        if (osm.authenticated()) {
-	            done();
+	      fn(url, {
+	        signal: controller.signal
+	      }).then(function (data) {
+	        done(null, data);
+	      })["catch"](function (err) {
+	        if (err.name === 'AbortError') return; // d3-fetch includes status in the error message,
+	        // but we can't access the response itself
+	        // https://github.com/d3/d3-fetch/issues/27
+
+	        var match = err.message.match(/^\d{3}/);
+
+	        if (match) {
+	          done({
+	            status: +match[0],
+	            statusText: err.message
+	          });
 	        } else {
-	            osm.authenticate(function(err) {
-	                if (err) {
-	                    cancel();
-	                } else {
-	                    done();
-	                }
-	            });
+	          done(err.message);
 	        }
+	      });
+	      return controller;
+	    }
+	  },
+	  // Load a single entity by id (ways and relations use the `/full` call to include
+	  // nodes and members). Parent relations are not included, see `loadEntityRelations`.
+	  // GET /api/0.6/node/#id
+	  // GET /api/0.6/[way|relation]/#id/full
+	  loadEntity: function loadEntity(id, callback) {
+	    var type = osmEntity.id.type(id);
+	    var osmID = osmEntity.id.toOSM(id);
+	    var options = {
+	      skipSeen: false
+	    };
+	    this.loadFromAPI('/api/0.6/' + type + '/' + osmID + (type !== 'node' ? '/full' : '') + '.json', function (err, entities) {
+	      if (callback) callback(err, {
+	        data: entities
+	      });
+	    }, options);
+	  },
+	  // Load a single entity with a specific version
+	  // GET /api/0.6/[node|way|relation]/#id/#version
+	  loadEntityVersion: function loadEntityVersion(id, version, callback) {
+	    var type = osmEntity.id.type(id);
+	    var osmID = osmEntity.id.toOSM(id);
+	    var options = {
+	      skipSeen: false
+	    };
+	    this.loadFromAPI('/api/0.6/' + type + '/' + osmID + '/' + version + '.json', function (err, entities) {
+	      if (callback) callback(err, {
+	        data: entities
+	      });
+	    }, options);
+	  },
+	  // Load the relations of a single entity with the given.
+	  // GET /api/0.6/[node|way|relation]/#id/relations
+	  loadEntityRelations: function loadEntityRelations(id, callback) {
+	    var type = osmEntity.id.type(id);
+	    var osmID = osmEntity.id.toOSM(id);
+	    var options = {
+	      skipSeen: false
 	    };
+	    this.loadFromAPI('/api/0.6/' + type + '/' + osmID + '/relations.json', function (err, entities) {
+	      if (callback) callback(err, {
+	        data: entities
+	      });
+	    }, options);
+	  },
+	  // Load multiple entities in chunks
+	  // (note: callback may be called multiple times)
+	  // Unlike `loadEntity`, child nodes and members are not fetched
+	  // GET /api/0.6/[nodes|ways|relations]?#parameters
+	  loadMultiple: function loadMultiple(ids, callback) {
+	    var that = this;
+	    var groups = utilArrayGroupBy(utilArrayUniq(ids), osmEntity.id.type);
+	    Object.keys(groups).forEach(function (k) {
+	      var type = k + 's'; // nodes, ways, relations
 
+	      var osmIDs = groups[k].map(function (id) {
+	        return osmEntity.id.toOSM(id);
+	      });
+	      var options = {
+	        skipSeen: false
+	      };
+	      utilArrayChunk(osmIDs, 150).forEach(function (arr) {
+	        that.loadFromAPI('/api/0.6/' + type + '.json?' + type + '=' + arr.join(), function (err, entities) {
+	          if (callback) callback(err, {
+	            data: entities
+	          });
+	        }, options);
+	      });
+	    });
+	  },
+	  // Create, upload, and close a changeset
+	  // PUT /api/0.6/changeset/create
+	  // POST /api/0.6/changeset/#id/upload
+	  // PUT /api/0.6/changeset/#id/close
+	  putChangeset: function putChangeset(changeset, changes, callback) {
+	    var cid = _connectionID;
+
+	    if (_changeset.inflight) {
+	      return callback({
+	        message: 'Changeset already inflight',
+	        status: -2
+	      }, changeset);
+	    } else if (_changeset.open) {
+	      // reuse existing open changeset..
+	      return createdChangeset.call(this, null, _changeset.open);
+	    } else {
+	      // Open a new changeset..
+	      var options = {
+	        method: 'PUT',
+	        path: '/api/0.6/changeset/create',
+	        options: {
+	          header: {
+	            'Content-Type': 'text/xml'
+	          }
+	        },
+	        content: JXON.stringify(changeset.asJXON())
+	      };
+	      _changeset.inflight = oauth.xhr(options, wrapcb(this, createdChangeset, cid));
+	    }
 
-	    mode.exit = function() {
+	    function createdChangeset(err, changesetID) {
+	      _changeset.inflight = null;
 
-	        keybindingOff();
+	      if (err) {
+	        return callback(err, changeset);
+	      }
 
-	        context.container().selectAll('.main-content')
-	            .classed('active', true)
-	            .classed('inactive', false);
+	      _changeset.open = changesetID;
+	      changeset = changeset.update({
+	        id: changesetID
+	      }); // Upload the changeset..
 
-	        context.ui().sidebar.hide();
-	    };
+	      var options = {
+	        method: 'POST',
+	        path: '/api/0.6/changeset/' + changesetID + '/upload',
+	        options: {
+	          header: {
+	            'Content-Type': 'text/xml'
+	          }
+	        },
+	        content: JXON.stringify(changeset.osmChangeJXON(changes))
+	      };
+	      _changeset.inflight = oauth.xhr(options, wrapcb(this, uploadedChangeset, cid));
+	    }
 
-	    return mode;
-	}
+	    function uploadedChangeset(err) {
+	      _changeset.inflight = null;
+	      if (err) return callback(err, changeset); // Upload was successful, safe to call the callback.
+	      // Add delay to allow for postgres replication #1646 #2678
 
-	function uiToolOldDrawModes(context) {
+	      window.setTimeout(function () {
+	        callback(null, changeset);
+	      }, 2500);
+	      _changeset.open = null; // At this point, we don't really care if the connection was switched..
+	      // Only try to close the changeset if we're still talking to the same server.
 
-	    var tool = {
-	        id: 'old_modes',
-	        label: _t('toolbar.add_feature')
-	    };
+	      if (this.getConnectionId() === cid) {
+	        // Still attempt to close changeset, but ignore response because #2667
+	        oauth.xhr({
+	          method: 'PUT',
+	          path: '/api/0.6/changeset/' + changeset.id + '/close',
+	          options: {
+	            header: {
+	              'Content-Type': 'text/xml'
+	            }
+	          }
+	        }, function () {
+	          return true;
+	        });
+	      }
+	    }
+	  },
+	  // Load multiple users in chunks
+	  // (note: callback may be called multiple times)
+	  // GET /api/0.6/users?users=#id1,#id2,...,#idn
+	  loadUsers: function loadUsers(uids, callback) {
+	    var toLoad = [];
+	    var cached = [];
+	    utilArrayUniq(uids).forEach(function (uid) {
+	      if (_userCache.user[uid]) {
+	        delete _userCache.toLoad[uid];
+	        cached.push(_userCache.user[uid]);
+	      } else {
+	        toLoad.push(uid);
+	      }
+	    });
 
-	    var modes = [
-	        modeAddPoint(context, {
-	            title: _t('modes.add_point.title'),
-	            button: 'point',
-	            description: _t('modes.add_point.description'),
-	            preset: _mainPresetIndex.item('point'),
-	            key: '1'
-	        }),
-	        modeAddLine(context, {
-	            title: _t('modes.add_line.title'),
-	            button: 'line',
-	            description: _t('modes.add_line.description'),
-	            preset: _mainPresetIndex.item('line'),
-	            key: '2'
-	        }),
-	        modeAddArea(context, {
-	            title: _t('modes.add_area.title'),
-	            button: 'area',
-	            description: _t('modes.add_area.description'),
-	            preset: _mainPresetIndex.item('area'),
-	            key: '3'
-	        })
-	    ];
+	    if (cached.length || !this.authenticated()) {
+	      callback(undefined, cached);
+	      if (!this.authenticated()) return; // require auth
+	    }
 
+	    utilArrayChunk(toLoad, 150).forEach(function (arr) {
+	      oauth.xhr({
+	        method: 'GET',
+	        path: '/api/0.6/users.json?users=' + arr.join()
+	      }, wrapcb(this, done, _connectionID));
+	    }.bind(this));
 
-	    function enabled() {
-	        return osmEditable();
+	    function done(err, payload) {
+	      if (err) return callback(err);
+	      var options = {
+	        skipSeen: true
+	      };
+	      return parseUserJSON(payload, function (err, results) {
+	        if (err) return callback(err);
+	        return callback(undefined, results);
+	      }, options);
 	    }
-
-	    function osmEditable() {
-	        return context.editable();
+	  },
+	  // Load a given user by id
+	  // GET /api/0.6/user/#id
+	  loadUser: function loadUser(uid, callback) {
+	    if (_userCache.user[uid] || !this.authenticated()) {
+	      // require auth
+	      delete _userCache.toLoad[uid];
+	      return callback(undefined, _userCache.user[uid]);
+	    }
+
+	    oauth.xhr({
+	      method: 'GET',
+	      path: '/api/0.6/user/' + uid + '.json'
+	    }, wrapcb(this, done, _connectionID));
+
+	    function done(err, payload) {
+	      if (err) return callback(err);
+	      var options = {
+	        skipSeen: true
+	      };
+	      return parseUserJSON(payload, function (err, results) {
+	        if (err) return callback(err);
+	        return callback(undefined, results[0]);
+	      }, options);
+	    }
+	  },
+	  // Load the details of the logged-in user
+	  // GET /api/0.6/user/details
+	  userDetails: function userDetails(callback) {
+	    if (_userDetails) {
+	      // retrieve cached
+	      return callback(undefined, _userDetails);
 	    }
 
-	    modes.forEach(function(mode) {
-	        context.keybinding().on(mode.key, function() {
-	            if (!enabled()) { return; }
+	    oauth.xhr({
+	      method: 'GET',
+	      path: '/api/0.6/user/details.json'
+	    }, wrapcb(this, done, _connectionID));
 
-	            if (mode.id === context.mode().id) {
-	                context.enter(modeBrowse(context));
-	            } else {
-	                context.enter(mode);
-	            }
-	        });
-	    });
+	    function done(err, payload) {
+	      if (err) return callback(err);
+	      var options = {
+	        skipSeen: false
+	      };
+	      return parseUserJSON(payload, function (err, results) {
+	        if (err) return callback(err);
+	        _userDetails = results[0];
+	        return callback(undefined, _userDetails);
+	      }, options);
+	    }
+	  },
+	  // Load previous changesets for the logged in user
+	  // GET /api/0.6/changesets?user=#id
+	  userChangesets: function userChangesets(callback) {
+	    if (_userChangesets) {
+	      // retrieve cached
+	      return callback(undefined, _userChangesets);
+	    }
 
-	    tool.render = function(selection) {
+	    this.userDetails(wrapcb(this, gotDetails, _connectionID));
 
-	        var wrap = selection
-	            .append('div')
-	            .attr('class', 'joined')
-	            .style('display', 'flex');
+	    function gotDetails(err, user) {
+	      if (err) {
+	        return callback(err);
+	      }
 
-	        var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
+	      oauth.xhr({
+	        method: 'GET',
+	        path: '/api/0.6/changesets?user=' + user.id
+	      }, wrapcb(this, done, _connectionID));
+	    }
 
-	        context.map()
-	            .on('move.modes', debouncedUpdate)
-	            .on('drawn.modes', debouncedUpdate);
+	    function done(err, xml) {
+	      if (err) {
+	        return callback(err);
+	      }
 
-	        context
-	            .on('enter.modes', update);
+	      _userChangesets = Array.prototype.map.call(xml.getElementsByTagName('changeset'), function (changeset) {
+	        return {
+	          tags: getTags(changeset)
+	        };
+	      }).filter(function (changeset) {
+	        var comment = changeset.tags.comment;
+	        return comment && comment !== '';
+	      });
+	      return callback(undefined, _userChangesets);
+	    }
+	  },
+	  // Fetch the status of the OSM API
+	  // GET /api/capabilities
+	  status: function status(callback) {
+	    var url = urlroot + '/api/capabilities';
+	    var errback = wrapcb(this, done, _connectionID);
+	    d3_xml(url).then(function (data) {
+	      errback(null, data);
+	    })["catch"](function (err) {
+	      errback(err.message);
+	    });
 
-	        update();
+	    function done(err, xml) {
+	      if (err) {
+	        // the status is null if no response could be retrieved
+	        return callback(err, null);
+	      } // update blocklists
 
 
-	        function update() {
+	      var elements = xml.getElementsByTagName('blacklist');
+	      var regexes = [];
 
-	            var buttons = wrap.selectAll('button.add-button')
-	                .data(modes, function(d) { return d.id; });
+	      for (var i = 0; i < elements.length; i++) {
+	        var regexString = elements[i].getAttribute('regex'); // needs unencode?
 
-	            // exit
-	            buttons.exit()
-	                .remove();
+	        if (regexString) {
+	          try {
+	            var regex = new RegExp(regexString);
+	            regexes.push(regex);
+	          } catch (e) {
+	            /* noop */
+	          }
+	        }
+	      }
 
-	            // enter
-	            var buttonsEnter = buttons.enter()
-	                .append('button')
-	                .attr('class', function(d) { return d.id + ' add-button bar-button'; })
-	                .on('click.mode-buttons', function(d) {
-	                    if (!enabled()) { return; }
+	      if (regexes.length) {
+	        _imageryBlocklists = regexes;
+	      }
 
-	                    // When drawing, ignore accidental clicks on mode buttons - #4042
-	                    var currMode = context.mode().id;
-	                    if (/^draw/.test(currMode)) { return; }
+	      if (_rateLimitError) {
+	        return callback(_rateLimitError, 'rateLimited');
+	      } else {
+	        var waynodes = xml.getElementsByTagName('waynodes');
+	        var maxWayNodes = waynodes.length && parseInt(waynodes[0].getAttribute('maximum'), 10);
+	        if (maxWayNodes && isFinite(maxWayNodes)) _maxWayNodes = maxWayNodes;
+	        var apiStatus = xml.getElementsByTagName('status');
+	        var val = apiStatus[0].getAttribute('api');
+	        return callback(undefined, val);
+	      }
+	    }
+	  },
+	  // Calls `status` and dispatches an `apiStatusChange` event if the returned
+	  // status differs from the cached status.
+	  reloadApiStatus: function reloadApiStatus() {
+	    // throttle to avoid unnecessary API calls
+	    if (!this.throttledReloadApiStatus) {
+	      var that = this;
+	      this.throttledReloadApiStatus = throttle(function () {
+	        that.status(function (err, status) {
+	          if (status !== _cachedApiStatus) {
+	            _cachedApiStatus = status;
+	            dispatch$2.call('apiStatusChange', that, err, status);
+	          }
+	        });
+	      }, 500);
+	    }
 
-	                    if (d.id === currMode) {
-	                        context.enter(modeBrowse(context));
-	                    } else {
-	                        context.enter(d);
-	                    }
-	                })
-	                .call(uiTooltip()
-	                    .placement('bottom')
-	                    .title(function(d) { return d.description; })
-	                    .keys(function(d) { return [d.key]; })
-	                    .scrollContainer(context.container().select('.top-toolbar'))
-	                );
+	    this.throttledReloadApiStatus();
+	  },
+	  // Returns the maximum number of nodes a single way can have
+	  maxWayNodes: function maxWayNodes() {
+	    return _maxWayNodes;
+	  },
+	  // Load data (entities) from the API in tiles
+	  // GET /api/0.6/map?bbox=
+	  loadTiles: function loadTiles(projection, callback) {
+	    if (_off) return; // determine the needed tiles to cover the view
 
-	            buttonsEnter
-	                .each(function(d) {
-	                    select(this)
-	                        .call(svgIcon('#iD-icon-' + d.button));
-	                });
+	    var tiles = tiler$2.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	            buttonsEnter
-	                .append('span')
-	                .attr('class', 'label')
-	                .text(function(mode) { return mode.title; });
+	    var hadRequests = hasInflightRequests(_tileCache);
+	    abortUnwantedRequests(_tileCache, tiles);
 
-	            // if we are adding/removing the buttons, check if toolbar has overflowed
-	            if (buttons.enter().size() || buttons.exit().size()) {
-	                context.ui().checkOverflow('.top-toolbar', true);
-	            }
+	    if (hadRequests && !hasInflightRequests(_tileCache)) {
+	      dispatch$2.call('loaded'); // stop the spinner
+	    } // issue new requests..
 
-	            // update
-	            buttons = buttons
-	                .merge(buttonsEnter)
-	                .classed('disabled', function(d) { return !enabled(); })
-	                .classed('active', function(d) { return context.mode() && context.mode().button === d.button; });
-	        }
-	    };
 
-	    return tool;
-	}
+	    tiles.forEach(function (tile) {
+	      this.loadTile(tile, callback);
+	    }, this);
+	  },
+	  // Load a single data tile
+	  // GET /api/0.6/map?bbox=
+	  loadTile: function loadTile(tile, callback) {
+	    if (_off) return;
+	    if (_tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) return;
 
-	function uiToolNotes(context) {
+	    if (!hasInflightRequests(_tileCache)) {
+	      dispatch$2.call('loading'); // start the spinner
+	    }
 
-	    var tool = {
-	        id: 'notes',
-	        label: _t('modes.add_note.label')
+	    var path = '/api/0.6/map.json?bbox=';
+	    var options = {
+	      skipSeen: true
 	    };
+	    _tileCache.inflight[tile.id] = this.loadFromAPI(path + tile.extent.toParam(), tileCallback, options);
 
-	    var mode = modeAddNote(context);
-
-	    function enabled() {
-	        return notesEnabled() && notesEditable();
-	    }
+	    function tileCallback(err, parsed) {
+	      delete _tileCache.inflight[tile.id];
 
-	    function notesEnabled() {
-	        var noteLayer = context.layers().layer('notes');
-	        return noteLayer && noteLayer.enabled();
-	    }
+	      if (!err) {
+	        delete _tileCache.toLoad[tile.id];
+	        _tileCache.loaded[tile.id] = true;
+	        var bbox = tile.extent.bbox();
+	        bbox.id = tile.id;
 
-	    function notesEditable() {
-	        var mode = context.mode();
-	        return context.map().notesEditable() && mode && mode.id !== 'save';
-	    }
+	        _tileCache.rtree.insert(bbox);
+	      }
 
-	    context.keybinding().on(mode.key, function() {
-	        if (!enabled()) { return; }
+	      if (callback) {
+	        callback(err, Object.assign({
+	          data: parsed
+	        }, tile));
+	      }
 
-	        if (mode.id === context.mode().id) {
-	            context.enter(modeBrowse(context));
-	        } else {
-	            context.enter(mode);
-	        }
+	      if (!hasInflightRequests(_tileCache)) {
+	        dispatch$2.call('loaded'); // stop the spinner
+	      }
+	    }
+	  },
+	  isDataLoaded: function isDataLoaded(loc) {
+	    var bbox = {
+	      minX: loc[0],
+	      minY: loc[1],
+	      maxX: loc[0],
+	      maxY: loc[1]
+	    };
+	    return _tileCache.rtree.collides(bbox);
+	  },
+	  // load the tile that covers the given `loc`
+	  loadTileAtLoc: function loadTileAtLoc(loc, callback) {
+	    // Back off if the toLoad queue is filling up.. re #6417
+	    // (Currently `loadTileAtLoc` requests are considered low priority - used by operations to
+	    // let users safely edit geometries which extend to unloaded tiles.  We can drop some.)
+	    if (Object.keys(_tileCache.toLoad).length > 50) return;
+	    var k = geoZoomToScale(_tileZoom + 1);
+	    var offset = geoRawMercator().scale(k)(loc);
+	    var projection = geoRawMercator().transform({
+	      k: k,
+	      x: -offset[0],
+	      y: -offset[1]
 	    });
+	    var tiles = tiler$2.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection);
+	    tiles.forEach(function (tile) {
+	      if (_tileCache.toLoad[tile.id] || _tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) return;
+	      _tileCache.toLoad[tile.id] = true;
+	      this.loadTile(tile, callback);
+	    }, this);
+	  },
+	  // Load notes from the API in tiles
+	  // GET /api/0.6/notes?bbox=
+	  loadNotes: function loadNotes(projection, noteOptions) {
+	    noteOptions = Object.assign({
+	      limit: 10000,
+	      closed: 7
+	    }, noteOptions);
+	    if (_off) return;
+	    var that = this;
+	    var path = '/api/0.6/notes?limit=' + noteOptions.limit + '&closed=' + noteOptions.closed + '&bbox=';
 
-	    tool.render = function(selection) {
+	    var throttleLoadUsers = throttle(function () {
+	      var uids = Object.keys(_userCache.toLoad);
+	      if (!uids.length) return;
+	      that.loadUsers(uids, function () {}); // eagerly load user details
+	    }, 750); // determine the needed tiles to cover the view
 
 
-	        var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
+	    var tiles = tiler$2.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	        context.map()
-	            .on('move.notes', debouncedUpdate)
-	            .on('drawn.notes', debouncedUpdate);
+	    abortUnwantedRequests(_noteCache, tiles); // issue new requests..
 
-	        context
-	            .on('enter.notes', update);
+	    tiles.forEach(function (tile) {
+	      if (_noteCache.loaded[tile.id] || _noteCache.inflight[tile.id]) return;
+	      var options = {
+	        skipSeen: false
+	      };
+	      _noteCache.inflight[tile.id] = that.loadFromAPI(path + tile.extent.toParam(), function (err) {
+	        delete _noteCache.inflight[tile.id];
 
-	        update();
+	        if (!err) {
+	          _noteCache.loaded[tile.id] = true;
+	        }
 
+	        throttleLoadUsers();
+	        dispatch$2.call('loadedNotes');
+	      }, options);
+	    });
+	  },
+	  // Create a note
+	  // POST /api/0.6/notes?params
+	  postNoteCreate: function postNoteCreate(note, callback) {
+	    if (!this.authenticated()) {
+	      return callback({
+	        message: 'Not Authenticated',
+	        status: -3
+	      }, note);
+	    }
 
-	        function update() {
-	            var showNotes = notesEnabled();
-	            var data = showNotes ? [mode] : [];
+	    if (_noteCache.inflightPost[note.id]) {
+	      return callback({
+	        message: 'Note update already inflight',
+	        status: -2
+	      }, note);
+	    }
 
-	            var buttons = selection.selectAll('button.add-button')
-	                .data(data, function(d) { return d.id; });
+	    if (!note.loc[0] || !note.loc[1] || !note.newComment) return; // location & description required
 
-	            // exit
-	            buttons.exit()
-	                .remove();
+	    var comment = note.newComment;
 
-	            // enter
-	            var buttonsEnter = buttons.enter()
-	                .append('button')
-	                .attr('tabindex', -1)
-	                .attr('class', function(d) { return d.id + ' add-button bar-button'; })
-	                .on('click.notes', function(d) {
-	                    if (!enabled()) { return; }
+	    if (note.newCategory && note.newCategory !== 'None') {
+	      comment += ' #' + note.newCategory;
+	    }
 
-	                    // When drawing, ignore accidental clicks on mode buttons - #4042
-	                    var currMode = context.mode().id;
-	                    if (/^draw/.test(currMode)) { return; }
+	    var path = '/api/0.6/notes?' + utilQsString({
+	      lon: note.loc[0],
+	      lat: note.loc[1],
+	      text: comment
+	    });
+	    _noteCache.inflightPost[note.id] = oauth.xhr({
+	      method: 'POST',
+	      path: path
+	    }, wrapcb(this, done, _connectionID));
 
-	                    if (d.id === currMode) {
-	                        context.enter(modeBrowse(context));
-	                    } else {
-	                        context.enter(d);
-	                    }
-	                })
-	                .call(uiTooltip()
-	                    .placement('bottom')
-	                    .title(function(d) { return d.description; })
-	                    .keys(function(d) { return [d.key]; })
-	                    .scrollContainer(context.container().select('.top-toolbar'))
-	                );
+	    function done(err, xml) {
+	      delete _noteCache.inflightPost[note.id];
 
-	            buttonsEnter
-	                .each(function(d) {
-	                    select(this)
-	                        .call(svgIcon(d.icon || '#iD-icon-' + d.button));
-	                });
+	      if (err) {
+	        return callback(err);
+	      } // we get the updated note back, remove from caches and reparse..
 
-	            // if we are adding/removing the buttons, check if toolbar has overflowed
-	            if (buttons.enter().size() || buttons.exit().size()) {
-	                context.ui().checkOverflow('.top-toolbar', true);
-	            }
 
-	            // update
-	            buttons = buttons
-	                .merge(buttonsEnter)
-	                .classed('disabled', function(d) { return !enabled(); })
-	                .classed('active', function(d) { return context.mode() && context.mode().button === d.button; });
+	      this.removeNote(note);
+	      var options = {
+	        skipSeen: false
+	      };
+	      return parseXML(xml, function (err, results) {
+	        if (err) {
+	          return callback(err);
+	        } else {
+	          return callback(undefined, results[0]);
 	        }
-	    };
+	      }, options);
+	    }
+	  },
+	  // Update a note
+	  // POST /api/0.6/notes/#id/comment?text=comment
+	  // POST /api/0.6/notes/#id/close?text=comment
+	  // POST /api/0.6/notes/#id/reopen?text=comment
+	  postNoteUpdate: function postNoteUpdate(note, newStatus, callback) {
+	    if (!this.authenticated()) {
+	      return callback({
+	        message: 'Not Authenticated',
+	        status: -3
+	      }, note);
+	    }
+
+	    if (_noteCache.inflightPost[note.id]) {
+	      return callback({
+	        message: 'Note update already inflight',
+	        status: -2
+	      }, note);
+	    }
+
+	    var action;
+
+	    if (note.status !== 'closed' && newStatus === 'closed') {
+	      action = 'close';
+	    } else if (note.status !== 'open' && newStatus === 'open') {
+	      action = 'reopen';
+	    } else {
+	      action = 'comment';
+	      if (!note.newComment) return; // when commenting, comment required
+	    }
 
-	    tool.uninstall = function() {
-	        context
-	            .on('enter.editor.notes', null)
-	            .on('exit.editor.notes', null)
-	            .on('enter.notes', null);
+	    var path = '/api/0.6/notes/' + note.id + '/' + action;
 
-	        context.map()
-	            .on('move.notes', null)
-	            .on('drawn.notes', null);
-	    };
+	    if (note.newComment) {
+	      path += '?' + utilQsString({
+	        text: note.newComment
+	      });
+	    }
 
-	    return tool;
-	}
+	    _noteCache.inflightPost[note.id] = oauth.xhr({
+	      method: 'POST',
+	      path: path
+	    }, wrapcb(this, done, _connectionID));
 
-	function uiToolSave(context) {
+	    function done(err, xml) {
+	      delete _noteCache.inflightPost[note.id];
 
-	    var tool = {
-	        id: 'save',
-	        label: _t('save.title')
-	    };
+	      if (err) {
+	        return callback(err);
+	      } // we get the updated note back, remove from caches and reparse..
 
-	    var button = null;
-	    var tooltipBehavior = null;
-	    var history = context.history();
-	    var key = uiCmd('⌘S');
-	    var _numChanges = 0;
 
-	    function isSaving() {
-	        var mode = context.mode();
-	        return mode && mode.id === 'save';
-	    }
+	      this.removeNote(note); // update closed note cache - used to populate `closed:note` changeset tag
 
-	    function isDisabled() {
-	        return _numChanges === 0 || isSaving();
-	    }
+	      if (action === 'close') {
+	        _noteCache.closed[note.id] = true;
+	      } else if (action === 'reopen') {
+	        delete _noteCache.closed[note.id];
+	      }
 
-	    function save() {
-	        event.preventDefault();
-	        if (!context.inIntro() && !isSaving() && history.hasChanges()) {
-	            context.enter(modeSave(context));
+	      var options = {
+	        skipSeen: false
+	      };
+	      return parseXML(xml, function (err, results) {
+	        if (err) {
+	          return callback(err);
+	        } else {
+	          return callback(undefined, results[0]);
 	        }
+	      }, options);
 	    }
-
-	    function bgColor() {
-	        var step;
-	        if (_numChanges === 0) {
-	            return null;
-	        } else if (_numChanges <= 50) {
-	            step = _numChanges / 50;
-	            return d3_interpolateRgb('#fff', '#ff8')(step);  // white -> yellow
+	  },
+	  "switch": function _switch(options) {
+	    urlroot = options.urlroot;
+	    oauth.options(Object.assign({
+	      url: urlroot,
+	      loading: authLoading,
+	      done: authDone
+	    }, options));
+	    this.reset();
+	    this.userChangesets(function () {}); // eagerly load user details/changesets
+
+	    dispatch$2.call('change');
+	    return this;
+	  },
+	  toggle: function toggle(val) {
+	    _off = !val;
+	    return this;
+	  },
+	  isChangesetInflight: function isChangesetInflight() {
+	    return !!_changeset.inflight;
+	  },
+	  // get/set cached data
+	  // This is used to save/restore the state when entering/exiting the walkthrough
+	  // Also used for testing purposes.
+	  caches: function caches(obj) {
+	    function cloneCache(source) {
+	      var target = {};
+	      Object.keys(source).forEach(function (k) {
+	        if (k === 'rtree') {
+	          target.rtree = new RBush().fromJSON(source.rtree.toJSON()); // clone rbush
+	        } else if (k === 'note') {
+	          target.note = {};
+	          Object.keys(source.note).forEach(function (id) {
+	            target.note[id] = osmNote(source.note[id]); // copy notes
+	          });
 	        } else {
-	            step = Math.min((_numChanges - 50) / 50, 1.0);
-	            return d3_interpolateRgb('#ff8', '#f88')(step);  // yellow -> red
+	          target[k] = JSON.parse(JSON.stringify(source[k])); // clone deep
 	        }
+	      });
+	      return target;
 	    }
 
-	    function updateCount() {
-	        var val = history.difference().summary().length;
-	        if (val === _numChanges) { return; }
-
-	        _numChanges = val;
-
-	        if (tooltipBehavior) {
-	            tooltipBehavior
-	                .title(_t(_numChanges > 0 ? 'save.help' : 'save.no_changes'))
-	                .keys([key]);
-	        }
+	    if (!arguments.length) {
+	      return {
+	        tile: cloneCache(_tileCache),
+	        note: cloneCache(_noteCache),
+	        user: cloneCache(_userCache)
+	      };
+	    } // access caches directly for testing (e.g., loading notes rtree)
 
-	        if (button) {
-	            button
-	                .classed('disabled', isDisabled())
-	                .style('background', bgColor());
 
-	            button.select('span.count')
-	                .text(_numChanges);
-	        }
+	    if (obj === 'get') {
+	      return {
+	        tile: _tileCache,
+	        note: _noteCache,
+	        user: _userCache
+	      };
 	    }
 
+	    if (obj.tile) {
+	      _tileCache = obj.tile;
+	      _tileCache.inflight = {};
+	    }
 
-	    tool.render = function(selection) {
-	        tooltipBehavior = uiTooltip()
-	            .placement('bottom')
-	            .title(_t('save.no_changes'))
-	            .keys([key])
-	            .scrollContainer(context.container().select('.top-toolbar'));
-
-	        var lastPointerUpType;
-
-	        button = selection
-	            .append('button')
-	            .attr('class', 'save disabled bar-button')
-	            .on('pointerup', function() {
-	                lastPointerUpType = event.pointerType;
-	            })
-	            .on('click', function() {
-	                event.preventDefault();
+	    if (obj.note) {
+	      _noteCache = obj.note;
+	      _noteCache.inflight = {};
+	      _noteCache.inflightPost = {};
+	    }
 
-	                save();
+	    if (obj.user) {
+	      _userCache = obj.user;
+	    }
 
-	                if (_numChanges === 0 && (
-	                    lastPointerUpType === 'touch' ||
-	                    lastPointerUpType === 'pen')
-	                ) {
-	                    // there are no tooltips for touch interactions so flash feedback instead
-	                    context.ui().flash
-	                        .duration(2000)
-	                        .iconName('#iD-icon-save')
-	                        .iconClass('disabled')
-	                        .text(_t('save.no_changes'))();
-	                }
-	                lastPointerUpType = null;
-	            })
-	            .call(tooltipBehavior);
+	    return this;
+	  },
+	  logout: function logout() {
+	    _userChangesets = undefined;
+	    _userDetails = undefined;
+	    oauth.logout();
+	    dispatch$2.call('change');
+	    return this;
+	  },
+	  authenticated: function authenticated() {
+	    return oauth.authenticated();
+	  },
+	  authenticate: function authenticate(callback) {
+	    var that = this;
+	    var cid = _connectionID;
+	    _userChangesets = undefined;
+	    _userDetails = undefined;
 
-	        button
-	            .call(svgIcon('#iD-icon-save'));
+	    function done(err, res) {
+	      if (err) {
+	        if (callback) callback(err);
+	        return;
+	      }
 
-	        button
-	            .append('span')
-	            .attr('class', 'count')
-	            .attr('aria-hidden', 'true')
-	            .text('0');
+	      if (that.getConnectionId() !== cid) {
+	        if (callback) callback({
+	          message: 'Connection Switched',
+	          status: -1
+	        });
+	        return;
+	      }
 
-	        updateCount();
+	      _rateLimitError = undefined;
+	      dispatch$2.call('change');
+	      if (callback) callback(err, res);
+	      that.userChangesets(function () {}); // eagerly load user details/changesets
+	    }
 
+	    return oauth.authenticate(done);
+	  },
+	  imageryBlocklists: function imageryBlocklists() {
+	    return _imageryBlocklists;
+	  },
+	  tileZoom: function tileZoom(val) {
+	    if (!arguments.length) return _tileZoom;
+	    _tileZoom = val;
+	    return this;
+	  },
+	  // get all cached notes covering the viewport
+	  notes: function notes(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    return _noteCache.rtree.search(bbox).map(function (d) {
+	      return d.data;
+	    });
+	  },
+	  // get a single note from the cache
+	  getNote: function getNote(id) {
+	    return _noteCache.note[id];
+	  },
+	  // remove a single note from the cache
+	  removeNote: function removeNote(note) {
+	    if (!(note instanceof osmNote) || !note.id) return;
+	    delete _noteCache.note[note.id];
+	    updateRtree(encodeNoteRtree(note), false); // false = remove
+	  },
+	  // replace a single note in the cache
+	  replaceNote: function replaceNote(note) {
+	    if (!(note instanceof osmNote) || !note.id) return;
+	    _noteCache.note[note.id] = note;
+	    updateRtree(encodeNoteRtree(note), true); // true = replace
 
-	        context.keybinding()
-	            .on(key, save, true);
+	    return note;
+	  },
+	  // Get an array of note IDs closed during this session.
+	  // Used to populate `closed:note` changeset tag
+	  getClosedIDs: function getClosedIDs() {
+	    return Object.keys(_noteCache.closed).sort();
+	  }
+	};
 
+	var _apibase$1 = 'https://wiki.openstreetmap.org/w/api.php';
+	var _inflight$1 = {};
+	var _wikibaseCache = {};
+	var _localeIDs = {
+	  en: false
+	};
 
-	        context.history()
-	            .on('change.save', updateCount);
+	var debouncedRequest$1 = debounce(request$1, 500, {
+	  leading: false
+	});
 
-	        context
-	            .on('enter.save', function() {
-	                if (button) {
-	                    button
-	                        .classed('disabled', isDisabled());
+	function request$1(url, callback) {
+	  if (_inflight$1[url]) return;
+	  var controller = new AbortController();
+	  _inflight$1[url] = controller;
+	  d3_json(url, {
+	    signal: controller.signal
+	  }).then(function (result) {
+	    delete _inflight$1[url];
+	    if (callback) callback(null, result);
+	  })["catch"](function (err) {
+	    delete _inflight$1[url];
+	    if (err.name === 'AbortError') return;
+	    if (callback) callback(err.message);
+	  });
+	}
 
-	                    if (isSaving()) {
-	                        button.call(tooltipBehavior.hide);
-	                    }
-	                }
-	            });
-	    };
+	var serviceOsmWikibase = {
+	  init: function init() {
+	    _inflight$1 = {};
+	    _wikibaseCache = {};
+	    _localeIDs = {};
+	  },
+	  reset: function reset() {
+	    Object.values(_inflight$1).forEach(function (controller) {
+	      controller.abort();
+	    });
+	    _inflight$1 = {};
+	  },
 
+	  /**
+	   * Get the best value for the property, or undefined if not found
+	   * @param entity object from wikibase
+	   * @param property string e.g. 'P4' for image
+	   * @param langCode string e.g. 'fr' for French
+	   */
+	  claimToValue: function claimToValue(entity, property, langCode) {
+	    if (!entity.claims[property]) return undefined;
+	    var locale = _localeIDs[langCode];
+	    var preferredPick, localePick;
+	    entity.claims[property].forEach(function (stmt) {
+	      // If exists, use value limited to the needed language (has a qualifier P26 = locale)
+	      // Or if not found, use the first value with the "preferred" rank
+	      if (!preferredPick && stmt.rank === 'preferred') {
+	        preferredPick = stmt;
+	      }
 
-	    tool.uninstall = function() {
-	        context.keybinding()
-	            .off(key, true);
+	      if (locale && stmt.qualifiers && stmt.qualifiers.P26 && stmt.qualifiers.P26[0].datavalue.value.id === locale) {
+	        localePick = stmt;
+	      }
+	    });
+	    var result = localePick || preferredPick;
 
-	        context.history()
-	            .on('change.save', null);
+	    if (result) {
+	      var datavalue = result.mainsnak.datavalue;
+	      return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
+	    } else {
+	      return undefined;
+	    }
+	  },
 
-	        context
-	            .on('enter.save', null);
+	  /**
+	   * Convert monolingual property into a key-value object (language -> value)
+	   * @param entity object from wikibase
+	   * @param property string e.g. 'P31' for monolingual wiki page title
+	   */
+	  monolingualClaimToValueObj: function monolingualClaimToValueObj(entity, property) {
+	    if (!entity || !entity.claims[property]) return undefined;
+	    return entity.claims[property].reduce(function (acc, obj) {
+	      var value = obj.mainsnak.datavalue.value;
+	      acc[value.language] = value.text;
+	      return acc;
+	    }, {});
+	  },
+	  toSitelink: function toSitelink(key, value) {
+	    var result = value ? 'Tag:' + key + '=' + value : 'Key:' + key;
+	    return result.replace(/_/g, ' ').trim();
+	  },
+	  //
+	  // Pass params object of the form:
+	  // {
+	  //   key: 'string',
+	  //   value: 'string',
+	  //   langCode: 'string'
+	  // }
+	  //
+	  getEntity: function getEntity(params, callback) {
+	    var doRequest = params.debounce ? debouncedRequest$1 : request$1;
+	    var that = this;
+	    var titles = [];
+	    var result = {};
+	    var rtypeSitelink = params.key === 'type' && params.value ? ('Relation:' + params.value).replace(/_/g, ' ').trim() : false;
+	    var keySitelink = params.key ? this.toSitelink(params.key) : false;
+	    var tagSitelink = params.key && params.value ? this.toSitelink(params.key, params.value) : false;
+	    var localeSitelink;
+
+	    if (params.langCodes) {
+	      params.langCodes.forEach(function (langCode) {
+	        if (_localeIDs[langCode] === undefined) {
+	          // If this is the first time we are asking about this locale,
+	          // fetch corresponding entity (if it exists), and cache it.
+	          // If there is no such entry, cache `false` value to avoid re-requesting it.
+	          localeSitelink = ('Locale:' + langCode).replace(/_/g, ' ').trim();
+	          titles.push(localeSitelink);
+	        }
+	      });
+	    }
 
-	        button = null;
-	        tooltipBehavior = null;
-	    };
+	    if (rtypeSitelink) {
+	      if (_wikibaseCache[rtypeSitelink]) {
+	        result.rtype = _wikibaseCache[rtypeSitelink];
+	      } else {
+	        titles.push(rtypeSitelink);
+	      }
+	    }
 
-	    return tool;
-	}
+	    if (keySitelink) {
+	      if (_wikibaseCache[keySitelink]) {
+	        result.key = _wikibaseCache[keySitelink];
+	      } else {
+	        titles.push(keySitelink);
+	      }
+	    }
 
-	function uiToolSidebarToggle(context) {
+	    if (tagSitelink) {
+	      if (_wikibaseCache[tagSitelink]) {
+	        result.tag = _wikibaseCache[tagSitelink];
+	      } else {
+	        titles.push(tagSitelink);
+	      }
+	    }
 
-	    var tool = {
-	        id: 'sidebar_toggle',
-	        label: _t('toolbar.inspect')
-	    };
+	    if (!titles.length) {
+	      // Nothing to do, we already had everything in the cache
+	      return callback(null, result);
+	    } // Requesting just the user language code
+	    // If backend recognizes the code, it will perform proper fallbacks,
+	    // and the result will contain the requested code. If not, all values are returned:
+	    // {"zh-tw":{"value":"...","language":"zh-tw","source-language":"zh-hant"}
+	    // {"pt-br":{"value":"...","language":"pt","for-language":"pt-br"}}
 
-	    tool.render = function(selection) {
-	        selection
-	            .append('button')
-	            .attr('class', 'bar-button')
-	            .on('click', function() {
-	                context.ui().sidebar.toggle();
-	            })
-	            .call(uiTooltip()
-	                .placement('bottom')
-	                .title(_t('sidebar.tooltip'))
-	                .keys([_t('sidebar.key')])
-	                .scrollContainer(context.container().select('.top-toolbar'))
-	            )
-	            .call(svgIcon('#iD-icon-sidebar-' + (_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')));
-	    };
 
-	    return tool;
-	}
+	    var obj = {
+	      action: 'wbgetentities',
+	      sites: 'wiki',
+	      titles: titles.join('|'),
+	      languages: params.langCodes.join('|'),
+	      languagefallback: 1,
+	      origin: '*',
+	      format: 'json' // There is an MW Wikibase API bug https://phabricator.wikimedia.org/T212069
+	      // We shouldn't use v1 until it gets fixed, but should switch to it afterwards
+	      // formatversion: 2,
+
+	    };
+	    var url = _apibase$1 + '?' + utilQsString(obj);
+	    doRequest(url, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else if (!d.success || d.error) {
+	        callback(d.error.messages.map(function (v) {
+	          return v.html['*'];
+	        }).join('<br>'));
+	      } else {
+	        var localeID = false;
+	        Object.values(d.entities).forEach(function (res) {
+	          if (res.missing !== '') {
+	            var title = res.sitelinks.wiki.title;
+
+	            if (title === rtypeSitelink) {
+	              _wikibaseCache[rtypeSitelink] = res;
+	              result.rtype = res;
+	            } else if (title === keySitelink) {
+	              _wikibaseCache[keySitelink] = res;
+	              result.key = res;
+	            } else if (title === tagSitelink) {
+	              _wikibaseCache[tagSitelink] = res;
+	              result.tag = res;
+	            } else if (title === localeSitelink) {
+	              localeID = res.id;
+	            } else {
+	              console.log('Unexpected title ' + title); // eslint-disable-line no-console
+	            }
+	          }
+	        });
 
-	function uiToolUndoRedo(context) {
+	        if (localeSitelink) {
+	          // If locale ID is not found, store false to prevent repeated queries
+	          that.addLocale(params.langCodes[0], localeID);
+	        }
 
-	    var tool = {
-	        id: 'undo_redo',
-	        label: _t('toolbar.undo_redo')
-	    };
+	        callback(null, result);
+	      }
+	    });
+	  },
+	  //
+	  // Pass params object of the form:
+	  // {
+	  //   key: 'string',     // required
+	  //   value: 'string'    // optional
+	  // }
+	  //
+	  // Get an result object used to display tag documentation
+	  // {
+	  //   title:        'string',
+	  //   description:  'string',
+	  //   editURL:      'string',
+	  //   imageURL:     'string',
+	  //   wiki:         { title: 'string', text: 'string', url: 'string' }
+	  // }
+	  //
+	  getDocs: function getDocs(params, callback) {
+	    var that = this;
+	    var langCodes = _mainLocalizer.localeCodes().map(function (code) {
+	      return code.toLowerCase();
+	    });
+	    params.langCodes = langCodes;
+	    this.getEntity(params, function (err, data) {
+	      if (err) {
+	        callback(err);
+	        return;
+	      }
 
-	    var commands = [{
-	        id: 'undo',
-	        cmd: uiCmd('⌘Z'),
-	        action: function() {
-	            context.undo();
-	        },
-	        annotation: function() {
-	            return context.history().undoAnnotation();
-	        },
-	        icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')
-	    }, {
-	        id: 'redo',
-	        cmd: uiCmd('⌘⇧Z'),
-	        action: function() {
-	            context.redo();
-	        },
-	        annotation: function() {
-	            return context.history().redoAnnotation();
-	        },
-	        icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'undo' : 'redo')
-	    }];
+	      var entity = data.rtype || data.tag || data.key;
 
+	      if (!entity) {
+	        callback('No entity');
+	        return;
+	      }
 
-	    function editable() {
-	        return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true /* ignore min zoom */);
-	    }
+	      var i;
+	      var description;
 
+	      for (i in langCodes) {
+	        var _code = langCodes[i];
 
-	    tool.render = function(selection) {
-	        var tooltipBehavior = uiTooltip()
-	            .placement('bottom')
-	            .title(function (d) {
-	                return d.annotation() ?
-	                    _t(d.id + '.tooltip', { action: d.annotation() }) :
-	                    _t(d.id + '.nothing');
-	            })
-	            .keys(function(d) {
-	                return [d.cmd];
-	            })
-	            .scrollContainer(context.container().select('.top-toolbar'));
+	        if (entity.descriptions[_code] && entity.descriptions[_code].language === _code) {
+	          description = entity.descriptions[_code];
+	          break;
+	        }
+	      }
 
-	        var lastPointerUpType;
+	      if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
 
-	        var buttons = selection.selectAll('button')
-	            .data(commands)
-	            .enter()
-	            .append('button')
-	            .attr('class', function(d) { return 'disabled ' + d.id + '-button bar-button'; })
-	            .on('pointerup', function() {
-	                // `pointerup` is always called before `click`
-	                lastPointerUpType = event.pointerType;
-	            })
-	            .on('click', function(d) {
-	                event.preventDefault();
-
-	                var annotation = d.annotation();
-
-	                if (editable() && annotation) {
-	                    d.action();
-	                }
+	      var result = {
+	        title: entity.title,
+	        description: description ? description.value : '',
+	        descriptionLocaleCode: description ? description.language : '',
+	        editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
+	      }; // add image
+
+	      if (entity.claims) {
+	        var imageroot;
+	        var image = that.claimToValue(entity, 'P4', langCodes[0]);
+
+	        if (image) {
+	          imageroot = 'https://commons.wikimedia.org/w/index.php';
+	        } else {
+	          image = that.claimToValue(entity, 'P28', langCodes[0]);
 
-	                if (editable() && (
-	                    lastPointerUpType === 'touch' ||
-	                    lastPointerUpType === 'pen')
-	                ) {
-	                    // there are no tooltips for touch interactions so flash feedback instead
-
-	                    var text = annotation ?
-	                        _t(d.id + '.tooltip', { action: annotation }) :
-	                        _t(d.id + '.nothing');
-	                    context.ui().flash
-	                        .duration(2000)
-	                        .iconName('#' + d.icon)
-	                        .iconClass(annotation ? '' : 'disabled')
-	                        .text(text)();
-	                }
-	                lastPointerUpType = null;
-	            })
-	            .call(tooltipBehavior);
+	          if (image) {
+	            imageroot = 'https://wiki.openstreetmap.org/w/index.php';
+	          }
+	        }
 
-	        buttons.each(function(d) {
-	            select(this)
-	                .call(svgIcon('#' + d.icon));
-	        });
+	        if (imageroot && image) {
+	          result.imageURL = imageroot + '?' + utilQsString({
+	            title: 'Special:Redirect/file/' + image,
+	            width: 400
+	          });
+	        }
+	      } // Try to get a wiki page from tag data item first, followed by the corresponding key data item.
+	      // If neither tag nor key data item contain a wiki page in the needed language nor English,
+	      // get the first found wiki page from either the tag or the key item.
 
-	        context.keybinding()
-	            .on(commands[0].cmd, function() {
-	                event.preventDefault();
-	                if (editable()) { commands[0].action(); }
-	            })
-	            .on(commands[1].cmd, function() {
-	                event.preventDefault();
-	                if (editable()) { commands[1].action(); }
-	            });
 
+	      var rtypeWiki = that.monolingualClaimToValueObj(data.rtype, 'P31');
+	      var tagWiki = that.monolingualClaimToValueObj(data.tag, 'P31');
+	      var keyWiki = that.monolingualClaimToValueObj(data.key, 'P31');
+	      var wikis = [rtypeWiki, tagWiki, keyWiki];
 
-	        var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
+	      for (i in wikis) {
+	        var wiki = wikis[i];
 
-	        context.map()
-	            .on('move.undo_redo', debouncedUpdate)
-	            .on('drawn.undo_redo', debouncedUpdate);
+	        for (var j in langCodes) {
+	          var code = langCodes[j];
+	          var referenceId = langCodes[0].split('-')[0] !== 'en' && code.split('-')[0] === 'en' ? 'inspector.wiki_en_reference' : 'inspector.wiki_reference';
+	          var info = getWikiInfo(wiki, code, referenceId);
 
-	        context.history()
-	            .on('change.undo_redo', function(difference) {
-	                if (difference) { update(); }
-	            });
+	          if (info) {
+	            result.wiki = info;
+	            break;
+	          }
+	        }
 
-	        context
-	            .on('enter.undo_redo', update);
+	        if (result.wiki) break;
+	      }
 
+	      callback(null, result); // Helper method to get wiki info if a given language exists
 
-	        function update() {
-	            buttons
-	                .classed('disabled', function(d) {
-	                    return !editable() || !d.annotation();
-	                })
-	                .each(function() {
-	                    var selection = select(this);
-	                    if (!selection.select('.tooltip.in').empty()) {
-	                        selection.call(tooltipBehavior.updateContent);
-	                    }
-	                });
+	      function getWikiInfo(wiki, langCode, tKey) {
+	        if (wiki && wiki[langCode]) {
+	          return {
+	            title: wiki[langCode],
+	            text: tKey,
+	            url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
+	          };
 	        }
-	    };
-
-	    tool.uninstall = function() {
-	        context.keybinding()
-	            .off(commands[0].cmd)
-	            .off(commands[1].cmd);
-
-	        context.map()
-	            .on('move.undo_redo', null)
-	            .on('drawn.undo_redo', null);
+	      }
+	    });
+	  },
+	  addLocale: function addLocale(langCode, qid) {
+	    // Makes it easier to unit test
+	    _localeIDs[langCode] = qid;
+	  },
+	  apibase: function apibase(val) {
+	    if (!arguments.length) return _apibase$1;
+	    _apibase$1 = val;
+	    return this;
+	  }
+	};
 
-	        context.history()
-	            .on('change.undo_redo', null);
+	var jsonpCache = {};
+	window.jsonpCache = jsonpCache;
+	function jsonpRequest(url, callback) {
+	  var request = {
+	    abort: function abort() {}
+	  };
 
-	        context
-	            .on('enter.undo_redo', null);
-	    };
+	  if (window.JSONP_FIX) {
+	    if (window.JSONP_DELAY === 0) {
+	      callback(window.JSONP_FIX);
+	    } else {
+	      var t = window.setTimeout(function () {
+	        callback(window.JSONP_FIX);
+	      }, window.JSONP_DELAY || 0);
 
-	    return tool;
-	}
+	      request.abort = function () {
+	        window.clearTimeout(t);
+	      };
+	    }
 
-	function uiTopToolbar(context) {
+	    return request;
+	  }
 
-	    var sidebarToggle = uiToolSidebarToggle(context),
-	        modes = uiToolOldDrawModes(context),
-	        notes = uiToolNotes(context),
-	        undoRedo = uiToolUndoRedo(context),
-	        save = uiToolSave(context);
+	  function rand() {
+	    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
+	    var c = '';
+	    var i = -1;
 
-	    function notesEnabled() {
-	        var noteLayer = context.layers().layer('notes');
-	        return noteLayer && noteLayer.enabled();
+	    while (++i < 15) {
+	      c += chars.charAt(Math.floor(Math.random() * 52));
 	    }
 
-	    function topToolbar(bar) {
-
-	        bar.on('wheel.topToolbar', function() {
-	            if (!event.deltaX) {
-	                // translate vertical scrolling into horizontal scrolling in case
-	                // the user doesn't have an input device that can scroll horizontally
-	                bar.node().scrollLeft += event.deltaY;
-	            }
-	        });
-
-	        var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
-	        context.layers()
-	            .on('change.topToolbar', debouncedUpdate);
+	    return c;
+	  }
 
-	        update();
+	  function create(url) {
+	    var e = url.match(/callback=(\w+)/);
+	    var c = e ? e[1] : rand();
 
-	        function update() {
+	    jsonpCache[c] = function (data) {
+	      if (jsonpCache[c]) {
+	        callback(data);
+	      }
 
-	            var tools = [
-	                sidebarToggle,
-	                'spacer',
-	                modes
-	            ];
+	      finalize();
+	    };
 
-	            tools.push('spacer');
+	    function finalize() {
+	      delete jsonpCache[c];
+	      script.remove();
+	    }
 
-	            if (notesEnabled()) {
-	                tools = tools.concat([notes, 'spacer']);
-	            }
+	    request.abort = finalize;
+	    return 'jsonpCache.' + c;
+	  }
 
-	            tools = tools.concat([undoRedo, save]);
+	  var cb = create(url);
+	  var script = select('head').append('script').attr('type', 'text/javascript').attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
+	  return request;
+	}
 
-	            var toolbarItems = bar.selectAll('.toolbar-item')
-	                .data(tools, function(d) {
-	                    return d.id || d;
-	                });
+	var bubbleApi = 'https://dev.virtualearth.net/mapcontrol/HumanScaleServices/GetBubbles.ashx?';
+	var streetsideImagesApi = 'https://t.ssl.ak.tiles.virtualearth.net/tiles/';
+	var bubbleAppKey = 'AuftgJsO0Xs8Ts4M1xZUQJQXJNsvmh3IV8DkNieCiy3tCwCUMq76-WpkrBtNAuEm';
+	var pannellumViewerCSS = 'pannellum-streetside/pannellum.css';
+	var pannellumViewerJS = 'pannellum-streetside/pannellum.js';
+	var maxResults = 2000;
+	var tileZoom = 16.5;
+	var tiler$1 = utilTiler().zoomExtent([tileZoom, tileZoom]).skipNullIsland(true);
+	var dispatch$1 = dispatch$8('loadedImages', 'viewerChanged');
+	var minHfov = 10; // zoom in degrees:  20, 10, 5
 
-	            toolbarItems.exit()
-	                .each(function(d) {
-	                    if (d.uninstall) {
-	                        d.uninstall();
-	                    }
-	                })
-	                .remove();
-
-	            var itemsEnter = toolbarItems
-	                .enter()
-	                .append('div')
-	                .attr('class', function(d) {
-	                    var classes = 'toolbar-item ' + (d.id || d).replace('_', '-');
-	                    if (d.klass) { classes += ' ' + d.klass; }
-	                    return classes;
-	                });
+	var maxHfov = 90; // zoom out degrees
 
-	            var actionableItems = itemsEnter.filter(function(d) { return d !== 'spacer'; });
+	var defaultHfov = 45;
+	var _hires = false;
+	var _resolution = 512; // higher numbers are slower - 512, 1024, 2048, 4096
 
-	            actionableItems
-	                .append('div')
-	                .attr('class', 'item-content')
-	                .each(function(d) {
-	                    select(this).call(d.render, bar);
-	                });
+	var _currScene = 0;
 
-	            actionableItems
-	                .append('div')
-	                .attr('class', 'item-label')
-	                .text(function(d) {
-	                    return d.label;
-	                });
-	        }
+	var _ssCache;
 
-	    }
+	var _pannellumViewer;
 
-	    return topToolbar;
-	}
+	var _sceneOptions = {
+	  showFullscreenCtrl: false,
+	  autoLoad: true,
+	  compass: true,
+	  yaw: 0,
+	  minHfov: minHfov,
+	  maxHfov: maxHfov,
+	  hfov: defaultHfov,
+	  type: 'cubemap',
+	  cubeMap: []
+	};
 
-	// these are module variables so they are preserved through a ui.restart()
-	var sawVersion = null;
-	var isNewVersion = false;
-	var isNewUser = false;
+	var _loadViewerPromise;
+	/**
+	 * abortRequest().
+	 */
 
 
-	function uiVersion(context) {
+	function abortRequest$1(i) {
+	  i.abort();
+	}
+	/**
+	 * localeTimeStamp().
+	 */
 
-	    var currVersion = context.version;
-	    var matchedVersion = currVersion.match(/\d+\.\d+\.\d+.*/);
 
-	    if (sawVersion === null && matchedVersion !== null) {
-	        if (corePreferences('sawVersion')) {
-	            isNewUser = false;
-	            isNewVersion = corePreferences('sawVersion') !== currVersion && currVersion.indexOf('-') === -1;
-	        } else {
-	            isNewUser = true;
-	            isNewVersion = true;
-	        }
-	        corePreferences('sawVersion', currVersion);
-	        sawVersion = currVersion;
-	    }
-
-	    return function(selection) {
-	        selection
-	            .append('a')
-	            .attr('target', '_blank')
-	            .attr('href', 'https://github.com/openstreetmap/iD')
-	            .text(currVersion);
-
-	        // only show new version indicator to users that have used iD before
-	        if (isNewVersion && !isNewUser) {
-	            selection
-	                .append('div')
-	                .attr('class', 'badge')
-	                .append('a')
-	                .attr('target', '_blank')
-	                .attr('href', 'https://github.com/openstreetmap/iD/blob/release/CHANGELOG.md#whats-new')
-	                .call(svgIcon('#maki-gift-11'))
-	                .call(uiTooltip()
-	                    .title(_t('version.whats_new', { version: currVersion }))
-	                    .placement('top')
-	                );
-	        }
-	    };
+	function localeTimestamp(s) {
+	  if (!s) return null;
+	  var options = {
+	    day: 'numeric',
+	    month: 'short',
+	    year: 'numeric'
+	  };
+	  var d = new Date(s);
+	  if (isNaN(d.getTime())) return null;
+	  return d.toLocaleString(_mainLocalizer.localeCode(), options);
 	}
+	/**
+	 * loadTiles() wraps the process of generating tiles and then fetching image points for each tile.
+	 */
 
-	function uiZoom(context) {
 
-	    var zooms = [{
-	        id: 'zoom-in',
-	        icon: 'iD-icon-plus',
-	        title: _t('zoom.in'),
-	        action: zoomIn,
-	        disabled: function() {
-	            return !context.map().canZoomIn();
-	        },
-	        disabledTitle: _t('zoom.disabled.in'),
-	        key: '+'
-	    }, {
-	        id: 'zoom-out',
-	        icon: 'iD-icon-minus',
-	        title: _t('zoom.out'),
-	        action: zoomOut,
-	        disabled: function() {
-	            return !context.map().canZoomOut();
-	        },
-	        disabledTitle: _t('zoom.disabled.out'),
-	        key: '-'
-	    }];
+	function loadTiles(which, url, projection, margin) {
+	  var tiles = tiler$1.margin(margin).getTiles(projection); // abort inflight requests that are no longer needed
 
-	    function zoomIn() {
-	        event.preventDefault();
-	        context.map().zoomIn();
-	    }
+	  var cache = _ssCache[which];
+	  Object.keys(cache.inflight).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k.indexOf(tile.id + ',') === 0;
+	    });
 
-	    function zoomOut() {
-	        event.preventDefault();
-	        context.map().zoomOut();
+	    if (!wanted) {
+	      abortRequest$1(cache.inflight[k]);
+	      delete cache.inflight[k];
 	    }
+	  });
+	  tiles.forEach(function (tile) {
+	    return loadNextTilePage(which, url, tile);
+	  });
+	}
+	/**
+	 * loadNextTilePage() load data for the next tile page in line.
+	 */
 
-	    function zoomInFurther() {
-	        event.preventDefault();
-	        context.map().zoomInFurther();
-	    }
 
-	    function zoomOutFurther() {
-	        event.preventDefault();
-	        context.map().zoomOutFurther();
-	    }
+	function loadNextTilePage(which, url, tile) {
+	  var cache = _ssCache[which];
+	  var nextPage = cache.nextPage[tile.id] || 0;
+	  var id = tile.id + ',' + String(nextPage);
+	  if (cache.loaded[id] || cache.inflight[id]) return;
+	  cache.inflight[id] = getBubbles(url, tile, function (bubbles) {
+	    cache.loaded[id] = true;
+	    delete cache.inflight[id];
+	    if (!bubbles) return; // [].shift() removes the first element, some statistics info, not a bubble point
 
-	    return function(selection) {
-	        var tooltipBehavior = uiTooltip()
-	            .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            .title(function(d) {
-	                if (d.disabled()) {
-	                    return d.disabledTitle;
-	                }
-	                return d.title;
-	            })
-	            .keys(function(d) {
-	                return [d.key];
-	            });
+	    bubbles.shift();
+	    var features = bubbles.map(function (bubble) {
+	      if (cache.points[bubble.id]) return null; // skip duplicates
 
-	        var lastPointerUpType;
+	      var loc = [bubble.lo, bubble.la];
+	      var d = {
+	        loc: loc,
+	        key: bubble.id,
+	        ca: bubble.he,
+	        captured_at: bubble.cd,
+	        captured_by: 'microsoft',
+	        // nbn: bubble.nbn,
+	        // pbn: bubble.pbn,
+	        // ad: bubble.ad,
+	        // rn: bubble.rn,
+	        pr: bubble.pr,
+	        // previous
+	        ne: bubble.ne,
+	        // next
+	        pano: true,
+	        sequenceKey: null
+	      };
+	      cache.points[bubble.id] = d; // a sequence starts here
 
-	        var buttons = selection.selectAll('button')
-	            .data(zooms)
-	            .enter()
-	            .append('button')
-	            .attr('class', function(d) { return d.id; })
-	            .on('pointerup.editor', function() {
-	                lastPointerUpType = event.pointerType;
-	            })
-	            .on('click.editor', function(d) {
-	                if (!d.disabled()) {
-	                    d.action();
-	                } else if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
-	                    context.ui().flash
-	                        .duration(2000)
-	                        .iconName('#' + d.icon)
-	                        .iconClass('disabled')
-	                        .text(d.disabledTitle)();
-	                }
-	                lastPointerUpType = null;
-	            })
-	            .call(tooltipBehavior);
+	      if (bubble.pr === undefined) {
+	        cache.leaders.push(bubble.id);
+	      }
 
-	        buttons.each(function(d) {
-	            select(this)
-	                .call(svgIcon('#' + d.icon, 'light'));
-	        });
+	      return {
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      };
+	    }).filter(Boolean);
+	    cache.rtree.load(features);
+	    connectSequences();
 
-	        ['plus', 'ffplus', '=', 'ffequals'].forEach(function(key) {
-	            context.keybinding().on([key], zoomIn);
-	            context.keybinding().on([uiCmd('⌘' + key)], zoomInFurther);
-	        });
+	    if (which === 'bubbles') {
+	      dispatch$1.call('loadedImages');
+	    }
+	  });
+	} // call this sometimes to connect the bubbles into sequences
 
-	        ['_', '-', 'ffminus', 'dash'].forEach(function(key) {
-	            context.keybinding().on([key], zoomOut);
-	            context.keybinding().on([uiCmd('⌘' + key)], zoomOutFurther);
-	        });
 
-	        function updateButtonStates() {
-	            buttons
-	                .classed('disabled', function(d) {
-	                    return d.disabled();
-	                })
-	                .each(function() {
-	                    var selection = select(this);
-	                    if (!selection.select('.tooltip.in').empty()) {
-	                        selection.call(tooltipBehavior.updateContent);
-	                    }
-	                });
-	        }
+	function connectSequences() {
+	  var cache = _ssCache.bubbles;
+	  var keepLeaders = [];
 
-	        updateButtonStates();
+	  for (var i = 0; i < cache.leaders.length; i++) {
+	    var bubble = cache.points[cache.leaders[i]];
+	    var seen = {}; // try to make a sequence.. use the key of the leader bubble.
 
-	        context.map().on('move.uiZoom', updateButtonStates);
+	    var sequence = {
+	      key: bubble.key,
+	      bubbles: []
 	    };
-	}
-
-	function uiZoomToSelection(context) {
+	    var complete = false;
 
-	    function isDisabled() {
-	        var mode = context.mode();
-	        return !mode || !mode.zoomToSelected;
-	    }
+	    do {
+	      sequence.bubbles.push(bubble);
+	      seen[bubble.key] = true;
 
-	    var _lastPointerUpType;
+	      if (bubble.ne === undefined) {
+	        complete = true;
+	      } else {
+	        bubble = cache.points[bubble.ne]; // advance to next
+	      }
+	    } while (bubble && !seen[bubble.key] && !complete);
 
-	    function pointerup() {
-	        _lastPointerUpType = event.pointerType;
-	    }
+	    if (complete) {
+	      _ssCache.sequences[sequence.key] = sequence; // assign bubbles to the sequence
 
-	    function click() {
-	        event.preventDefault();
+	      for (var j = 0; j < sequence.bubbles.length; j++) {
+	        sequence.bubbles[j].sequenceKey = sequence.key;
+	      } // create a GeoJSON LineString
 
-	        if (isDisabled()) {
-	            if (_lastPointerUpType === 'touch' || _lastPointerUpType === 'pen') {
-	                context.ui().flash
-	                    .duration(2000)
-	                    .iconName('#iD-icon-framed-dot')
-	                    .iconClass('disabled')
-	                    .text(_t('inspector.zoom_to.no_selection'))();
-	            }
-	        } else {
-	            var mode = context.mode();
-	            if (mode && mode.zoomToSelected) {
-	                mode.zoomToSelected();
-	            }
-	        }
 
-	        _lastPointerUpType = null;
+	      sequence.geojson = {
+	        type: 'LineString',
+	        properties: {
+	          captured_at: sequence.bubbles[0] ? sequence.bubbles[0].captured_at : null,
+	          captured_by: sequence.bubbles[0] ? sequence.bubbles[0].captured_by : null,
+	          key: sequence.key
+	        },
+	        coordinates: sequence.bubbles.map(function (d) {
+	          return d.loc;
+	        })
+	      };
+	    } else {
+	      keepLeaders.push(cache.leaders[i]);
 	    }
+	  } // couldn't complete these, save for later
 
-	    return function(selection) {
 
-	        var tooltipBehavior = uiTooltip()
-	            .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            .title(function() {
-	                if (isDisabled()) {
-	                    return _t('inspector.zoom_to.no_selection');
-	                }
-	                return _t('inspector.zoom_to.title');
-	            })
-	            .keys([_t('inspector.zoom_to.key')]);
-
-	        var button = selection
-	            .append('button')
-	            .on('pointerup', pointerup)
-	            .on('click', click)
-	            .call(svgIcon('#iD-icon-framed-dot', 'light'))
-	            .call(tooltipBehavior);
-
-	        function setEnabledState() {
-	            button.classed('disabled', isDisabled());
-	            if (!button.select('.tooltip.in').empty()) {
-	                button.call(tooltipBehavior.updateContent);
-	            }
-	        }
+	  cache.leaders = keepLeaders;
+	}
+	/**
+	 * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
+	 */
 
-	        context.on('enter.uiZoomToSelection', setEnabledState);
 
-	        setEnabledState();
-	    };
-	}
+	function getBubbles(url, tile, callback) {
+	  var rect = tile.extent.rectangle();
+	  var urlForRequest = url + utilQsString({
+	    n: rect[3],
+	    s: rect[1],
+	    e: rect[2],
+	    w: rect[0],
+	    c: maxResults,
+	    appkey: bubbleAppKey,
+	    jsCallback: '{callback}'
+	  });
+	  return jsonpRequest(urlForRequest, function (data) {
+	    if (!data || data.error) {
+	      callback(null);
+	    } else {
+	      callback(data);
+	    }
+	  });
+	} // partition viewport into higher zoom tiles
 
-	function uiPane(id, context) {
 
-	    var _key;
-	    var _title = '';
-	    var _description = '';
-	    var _iconName = '';
-	    var _sections; // array of uiSection objects
+	function partitionViewport(projection) {
+	  var z = geoScaleToZoom(projection.scale());
+	  var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
 
-	    var _paneSelection = select(null);
+	  var tiler = utilTiler().zoomExtent([z2, z2]);
+	  return tiler.getTiles(projection).map(function (tile) {
+	    return tile.extent;
+	  });
+	} // no more than `limit` results per partition.
 
-	    var _paneTooltip;
 
-	    var pane = {
-	        id: id
-	    };
+	function searchLimited(limit, projection, rtree) {
+	  limit = limit || 5;
+	  return partitionViewport(projection).reduce(function (result, extent) {
+	    var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
+	      return d.data;
+	    });
+	    return found.length ? result.concat(found) : result;
+	  }, []);
+	}
+	/**
+	 * loadImage()
+	 */
 
-	    pane.title = function(val) {
-	        if (!arguments.length) { return _title; }
-	        _title = val;
-	        return pane;
-	    };
 
-	    pane.key = function(val) {
-	        if (!arguments.length) { return _key; }
-	        _key = val;
-	        return pane;
-	    };
+	function loadImage(imgInfo) {
+	  return new Promise(function (resolve) {
+	    var img = new Image();
 
-	    pane.description = function(val) {
-	        if (!arguments.length) { return _description; }
-	        _description = val;
-	        return pane;
+	    img.onload = function () {
+	      var canvas = document.getElementById('ideditor-canvas' + imgInfo.face);
+	      var ctx = canvas.getContext('2d');
+	      ctx.drawImage(img, imgInfo.x, imgInfo.y);
+	      resolve({
+	        imgInfo: imgInfo,
+	        status: 'ok'
+	      });
 	    };
 
-	    pane.iconName = function(val) {
-	        if (!arguments.length) { return _iconName; }
-	        _iconName = val;
-	        return pane;
+	    img.onerror = function () {
+	      resolve({
+	        data: imgInfo,
+	        status: 'error'
+	      });
 	    };
 
-	    pane.sections = function(val) {
-	        if (!arguments.length) { return _sections; }
-	        _sections = val;
-	        return pane;
-	    };
+	    img.setAttribute('crossorigin', '');
+	    img.src = imgInfo.url;
+	  });
+	}
+	/**
+	 * loadCanvas()
+	 */
+
 
-	    pane.selection = function() {
-	        return _paneSelection;
+	function loadCanvas(imageGroup) {
+	  return Promise.all(imageGroup.map(loadImage)).then(function (data) {
+	    var canvas = document.getElementById('ideditor-canvas' + data[0].imgInfo.face);
+	    var which = {
+	      '01': 0,
+	      '02': 1,
+	      '03': 2,
+	      '10': 3,
+	      '11': 4,
+	      '12': 5
+	    };
+	    var face = data[0].imgInfo.face;
+	    _sceneOptions.cubeMap[which[face]] = canvas.toDataURL('image/jpeg', 1.0);
+	    return {
+	      status: 'loadCanvas for face ' + data[0].imgInfo.face + 'ok'
 	    };
+	  });
+	}
+	/**
+	 * loadFaces()
+	 */
 
-	    function hidePane() {
-	        context.ui().togglePanes();
-	    }
 
-	    pane.togglePane = function() {
-	        if (event) { event.preventDefault(); }
-	        _paneTooltip.hide();
-	        context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
+	function loadFaces(faceGroup) {
+	  return Promise.all(faceGroup.map(loadCanvas)).then(function () {
+	    return {
+	      status: 'loadFaces done'
 	    };
+	  });
+	}
 
-	    pane.renderToggleButton = function(selection) {
+	function setupCanvas(selection, reset) {
+	  if (reset) {
+	    selection.selectAll('#ideditor-stitcher-canvases').remove();
+	  } // Add the Streetside working canvases. These are used for 'stitching', or combining,
+	  // multiple images for each of the six faces, before passing to the Pannellum control as DataUrls
 
-	        if (!_paneTooltip) {
-	            _paneTooltip = uiTooltip()
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	                .title(_description)
-	                .keys([_key]);
-	        }
 
-	        selection
-	            .append('button')
-	            .on('click', pane.togglePane)
-	            .call(svgIcon('#' + _iconName, 'light'))
-	            .call(_paneTooltip);
-	    };
+	  selection.selectAll('#ideditor-stitcher-canvases').data([0]).enter().append('div').attr('id', 'ideditor-stitcher-canvases').attr('display', 'none').selectAll('canvas').data(['canvas01', 'canvas02', 'canvas03', 'canvas10', 'canvas11', 'canvas12']).enter().append('canvas').attr('id', function (d) {
+	    return 'ideditor-' + d;
+	  }).attr('width', _resolution).attr('height', _resolution);
+	}
 
-	    pane.renderContent = function(selection) {
-	        // override to fully customize content
+	function qkToXY(qk) {
+	  var x = 0;
+	  var y = 0;
+	  var scale = 256;
 
-	        if (_sections) {
-	            _sections.forEach(function(section) {
-	                selection.call(section.render);
-	            });
-	        }
-	    };
+	  for (var i = qk.length; i > 0; i--) {
+	    var key = qk[i - 1];
+	    x += +(key === '1' || key === '3') * scale;
+	    y += +(key === '2' || key === '3') * scale;
+	    scale *= 2;
+	  }
 
-	    pane.renderPane = function(selection) {
+	  return [x, y];
+	}
 
-	        _paneSelection = selection
-	            .append('div')
-	            .attr('class', 'fillL map-pane hide ' + id + '-pane')
-	            .attr('pane', id);
+	function getQuadKeys() {
+	  var dim = _resolution / 256;
+	  var quadKeys;
 
-	        var heading = _paneSelection
-	            .append('div')
-	            .attr('class', 'pane-heading');
+	  if (dim === 16) {
+	    quadKeys = ['0000', '0001', '0010', '0011', '0100', '0101', '0110', '0111', '1000', '1001', '1010', '1011', '1100', '1101', '1110', '1111', '0002', '0003', '0012', '0013', '0102', '0103', '0112', '0113', '1002', '1003', '1012', '1013', '1102', '1103', '1112', '1113', '0020', '0021', '0030', '0031', '0120', '0121', '0130', '0131', '1020', '1021', '1030', '1031', '1120', '1121', '1130', '1131', '0022', '0023', '0032', '0033', '0122', '0123', '0132', '0133', '1022', '1023', '1032', '1033', '1122', '1123', '1132', '1133', '0200', '0201', '0210', '0211', '0300', '0301', '0310', '0311', '1200', '1201', '1210', '1211', '1300', '1301', '1310', '1311', '0202', '0203', '0212', '0213', '0302', '0303', '0312', '0313', '1202', '1203', '1212', '1213', '1302', '1303', '1312', '1313', '0220', '0221', '0230', '0231', '0320', '0321', '0330', '0331', '1220', '1221', '1230', '1231', '1320', '1321', '1330', '1331', '0222', '0223', '0232', '0233', '0322', '0323', '0332', '0333', '1222', '1223', '1232', '1233', '1322', '1323', '1332', '1333', '2000', '2001', '2010', '2011', '2100', '2101', '2110', '2111', '3000', '3001', '3010', '3011', '3100', '3101', '3110', '3111', '2002', '2003', '2012', '2013', '2102', '2103', '2112', '2113', '3002', '3003', '3012', '3013', '3102', '3103', '3112', '3113', '2020', '2021', '2030', '2031', '2120', '2121', '2130', '2131', '3020', '3021', '3030', '3031', '3120', '3121', '3130', '3131', '2022', '2023', '2032', '2033', '2122', '2123', '2132', '2133', '3022', '3023', '3032', '3033', '3122', '3123', '3132', '3133', '2200', '2201', '2210', '2211', '2300', '2301', '2310', '2311', '3200', '3201', '3210', '3211', '3300', '3301', '3310', '3311', '2202', '2203', '2212', '2213', '2302', '2303', '2312', '2313', '3202', '3203', '3212', '3213', '3302', '3303', '3312', '3313', '2220', '2221', '2230', '2231', '2320', '2321', '2330', '2331', '3220', '3221', '3230', '3231', '3320', '3321', '3330', '3331', '2222', '2223', '2232', '2233', '2322', '2323', '2332', '2333', '3222', '3223', '3232', '3233', '3322', '3323', '3332', '3333'];
+	  } else if (dim === 8) {
+	    quadKeys = ['000', '001', '010', '011', '100', '101', '110', '111', '002', '003', '012', '013', '102', '103', '112', '113', '020', '021', '030', '031', '120', '121', '130', '131', '022', '023', '032', '033', '122', '123', '132', '133', '200', '201', '210', '211', '300', '301', '310', '311', '202', '203', '212', '213', '302', '303', '312', '313', '220', '221', '230', '231', '320', '321', '330', '331', '222', '223', '232', '233', '322', '323', '332', '333'];
+	  } else if (dim === 4) {
+	    quadKeys = ['00', '01', '10', '11', '02', '03', '12', '13', '20', '21', '30', '31', '22', '23', '32', '33'];
+	  } else {
+	    // dim === 2
+	    quadKeys = ['0', '1', '2', '3'];
+	  }
 
-	        heading
-	            .append('h2')
-	            .text(_title);
+	  return quadKeys;
+	}
 
-	        heading
-	            .append('button')
-	            .on('click', hidePane)
-	            .call(svgIcon('#iD-icon-close'));
+	var serviceStreetside = {
+	  /**
+	   * init() initialize streetside.
+	   */
+	  init: function init() {
+	    if (!_ssCache) {
+	      this.reset();
+	    }
 
+	    this.event = utilRebind(this, dispatch$1, 'on');
+	  },
 
-	        _paneSelection
-	            .append('div')
-	            .attr('class', 'pane-content')
-	            .call(pane.renderContent);
+	  /**
+	   * reset() reset the cache.
+	   */
+	  reset: function reset() {
+	    if (_ssCache) {
+	      Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$1);
+	    }
 
-	        if (_key) {
-	            context.keybinding()
-	                .on(_key, pane.togglePane);
-	        }
+	    _ssCache = {
+	      bubbles: {
+	        inflight: {},
+	        loaded: {},
+	        nextPage: {},
+	        rtree: new RBush(),
+	        points: {},
+	        leaders: []
+	      },
+	      sequences: {}
 	    };
+	  },
 
-	    return pane;
-	}
+	  /**
+	   * bubbles()
+	   */
+	  bubbles: function bubbles(projection) {
+	    var limit = 5;
+	    return searchLimited(limit, projection, _ssCache.bubbles.rtree);
+	  },
+	  cachedImage: function cachedImage(imageKey) {
+	    return _ssCache.bubbles.points[imageKey];
+	  },
+	  sequences: function sequences(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    var seen = {};
+	    var results = []; // all sequences for bubbles in viewport
 
-	function uiSectionBackgroundDisplayOptions(context) {
+	    _ssCache.bubbles.rtree.search(bbox).forEach(function (d) {
+	      var key = d.data.sequenceKey;
 
-	    var section = uiSection('background-display-options', context)
-	        .title(_t('background.display_options'))
-	        .disclosureContent(renderDisclosureContent);
+	      if (key && !seen[key]) {
+	        seen[key] = true;
+	        results.push(_ssCache.sequences[key].geojson);
+	      }
+	    });
+
+	    return results;
+	  },
 
-	    var _detected = utilDetect();
-	    var _storedOpacity = corePreferences('background-opacity');
-	    var _minVal = 0.25;
-	    var _maxVal = _detected.cssfilters ? 2 : 1;
+	  /**
+	   * loadBubbles()
+	   */
+	  loadBubbles: function loadBubbles(projection, margin) {
+	    // by default: request 2 nearby tiles so we can connect sequences.
+	    if (margin === undefined) margin = 2;
+	    loadTiles('bubbles', bubbleApi, projection, margin);
+	  },
+	  viewer: function viewer() {
+	    return _pannellumViewer;
+	  },
+	  initViewer: function initViewer() {
+	    if (!window.pannellum) return;
+	    if (_pannellumViewer) return;
+	    _currScene += 1;
 
-	    var _sliders = _detected.cssfilters
-	        ? ['brightness', 'contrast', 'saturation', 'sharpness']
-	        : ['brightness'];
+	    var sceneID = _currScene.toString();
 
-	    var _options = {
-	        brightness: (_storedOpacity !== null ? (+_storedOpacity) : 1),
-	        contrast: 1,
-	        saturation: 1,
-	        sharpness: 1
+	    var options = {
+	      'default': {
+	        firstScene: sceneID
+	      },
+	      scenes: {}
 	    };
+	    options.scenes[sceneID] = _sceneOptions;
+	    _pannellumViewer = window.pannellum.viewer('ideditor-viewer-streetside', options);
+	  },
+	  ensureViewerLoaded: function ensureViewerLoaded(context) {
+	    if (_loadViewerPromise) return _loadViewerPromise; // create ms-wrapper, a photo wrapper class
 
-	    function clamp(x, min, max) {
-	        return Math.max(min, Math.min(x, max));
-	    }
+	    var wrap = context.container().select('.photoviewer').selectAll('.ms-wrapper').data([0]); // inject ms-wrapper into the photoviewer div
+	    // (used by all to house each custom photo viewer)
 
-	    function updateValue(d, val) {
-	        if (!val && event && event.target) {
-	            val = event.target.value;
-	        }
+	    var wrapEnter = wrap.enter().append('div').attr('class', 'photo-wrapper ms-wrapper').classed('hide', true);
+	    var that = this;
+	    var pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // inject div to support streetside viewer (pannellum) and attribution line
 
-	        val = clamp(val, _minVal, _maxVal);
+	    wrapEnter.append('div').attr('id', 'ideditor-viewer-streetside').on(pointerPrefix + 'down.streetside', function () {
+	      select(window).on(pointerPrefix + 'move.streetside', function () {
+	        dispatch$1.call('viewerChanged');
+	      }, true);
+	    }).on(pointerPrefix + 'up.streetside pointercancel.streetside', function () {
+	      select(window).on(pointerPrefix + 'move.streetside', null); // continue dispatching events for a few seconds, in case viewer has inertia.
 
-	        _options[d] = val;
-	        context.background()[d](val);
+	      var t = timer(function (elapsed) {
+	        dispatch$1.call('viewerChanged');
 
-	        if (d === 'brightness') {
-	            corePreferences('background-opacity', val);
+	        if (elapsed > 2000) {
+	          t.stop();
 	        }
+	      });
+	    }).append('div').attr('class', 'photo-attribution fillD');
+	    var controlsEnter = wrapEnter.append('div').attr('class', 'photo-controls-wrap').append('div').attr('class', 'photo-controls');
+	    controlsEnter.append('button').on('click.back', step(-1)).text('◄');
+	    controlsEnter.append('button').on('click.forward', step(1)).text('►'); // create working canvas for stitching together images
 
-	        section.reRender();
-	    }
-
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.display-options-container')
-	            .data([0]);
-
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'display-options-container controls-list');
-
-	        // add slider controls
-	        var slidersEnter = containerEnter.selectAll('.display-control')
-	            .data(_sliders)
-	            .enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'display-control display-control-' + d; });
-
-	        slidersEnter
-	            .append('h5')
-	            .text(function(d) { return _t('background.' + d); })
-	            .append('span')
-	            .attr('class', function(d) { return 'display-option-value display-option-value-' + d; });
-
-	        slidersEnter
-	            .append('input')
-	            .attr('class', function(d) { return 'display-option-input display-option-input-' + d; })
-	            .attr('type', 'range')
-	            .attr('min', _minVal)
-	            .attr('max', _maxVal)
-	            .attr('step', '0.05')
-	            .on('input', function(d) {
-	                var val = select(this).property('value');
-	                updateValue(d, val);
-	            });
+	    wrap = wrap.merge(wrapEnter).call(setupCanvas, true); // Register viewer resize handler
 
-	        slidersEnter
-	            .append('button')
-	            .attr('title', _t('background.reset'))
-	            .attr('class', function(d) { return 'display-option-reset display-option-reset-' + d; })
-	            .on('click', function(d) {
-	                if (event.button !== 0) { return; }
-	                updateValue(d, 1);
-	            })
-	            .call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
-
-	        // reset all button
-	        containerEnter
-	            .append('a')
-	            .attr('class', 'display-option-resetlink')
-	            .attr('href', '#')
-	            .text(_t('background.reset_all'))
-	            .on('click', function() {
-	                for (var i = 0; i < _sliders.length; i++) {
-	                    updateValue(_sliders[i],1);
-	                }
-	            });
+	    context.ui().photoviewer.on('resize.streetside', function () {
+	      if (_pannellumViewer) {
+	        _pannellumViewer.resize();
+	      }
+	    });
+	    _loadViewerPromise = new Promise(function (resolve, reject) {
+	      var loadedCount = 0;
 
-	        // update
-	        container = containerEnter
-	            .merge(container);
+	      function loaded() {
+	        loadedCount += 1; // wait until both files are loaded
 
-	        container.selectAll('.display-option-input')
-	            .property('value', function(d) { return _options[d]; });
+	        if (loadedCount === 2) resolve();
+	      }
 
-	        container.selectAll('.display-option-value')
-	            .text(function(d) { return Math.floor(_options[d] * 100) + '%'; });
+	      var head = select('head'); // load streetside pannellum viewer css
 
-	        container.selectAll('.display-option-reset')
-	            .classed('disabled', function(d) { return _options[d] === 1; });
+	      head.selectAll('#ideditor-streetside-viewercss').data([0]).enter().append('link').attr('id', 'ideditor-streetside-viewercss').attr('rel', 'stylesheet').attr('crossorigin', 'anonymous').attr('href', context.asset(pannellumViewerCSS)).on('load.serviceStreetside', loaded).on('error.serviceStreetside', function () {
+	        reject();
+	      }); // load streetside pannellum viewer js
 
-	        // first time only, set brightness if needed
-	        if (containerEnter.size() && _options.brightness !== 1) {
-	            context.background().brightness(_options.brightness);
-	        }
-	    }
+	      head.selectAll('#ideditor-streetside-viewerjs').data([0]).enter().append('script').attr('id', 'ideditor-streetside-viewerjs').attr('crossorigin', 'anonymous').attr('src', context.asset(pannellumViewerJS)).on('load.serviceStreetside', loaded).on('error.serviceStreetside', function () {
+	        reject();
+	      });
+	    })["catch"](function () {
+	      _loadViewerPromise = null;
+	    });
+	    return _loadViewerPromise;
 
-	    return section;
-	}
+	    function step(stepBy) {
+	      return function () {
+	        var viewer = context.container().select('.photoviewer');
+	        var selected = viewer.empty() ? undefined : viewer.datum();
+	        if (!selected) return;
+	        var nextID = stepBy === 1 ? selected.ne : selected.pr;
 
-	function uiSettingsCustomBackground() {
-	    var dispatch$1 = dispatch('change');
+	        var yaw = _pannellumViewer.getYaw();
 
-	    function render(selection) {
-	        // keep separate copies of original and current settings
-	        var _origSettings = {
-	            template: corePreferences('background-custom-template')
-	        };
-	        var _currSettings = {
-	            template: corePreferences('background-custom-template')
-	        };
+	        var ca = selected.ca + yaw;
+	        var origin = selected.loc; // construct a search trapezoid pointing out from current bubble
 
-	        var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
-	        var modal = uiConfirm(selection).okButton();
-
-	        modal
-	            .classed('settings-modal settings-custom-background', true);
-
-	        modal.select('.modal-section.header')
-	            .append('h3')
-	            .text(_t('settings.custom_background.header'));
-
-
-	        var textSection = modal.select('.modal-section.message-text');
-
-	        var instructions =
-	            (_t('settings.custom_background.instructions.info')) + "\n" +
-	            '\n' +
-	            "#### " + (_t('settings.custom_background.instructions.wms.tokens_label')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.wms.tokens.proj')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.wms.tokens.wkid')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.wms.tokens.dimensions')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.wms.tokens.bbox')) + "\n" +
-	            '\n' +
-	            "#### " + (_t('settings.custom_background.instructions.tms.tokens_label')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.tms.tokens.xyz')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.tms.tokens.flipped_y')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.tms.tokens.switch')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.tms.tokens.quadtile')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.tms.tokens.scale_factor')) + "\n" +
-	            '\n' +
-	            "#### " + (_t('settings.custom_background.instructions.example')) + "\n" +
-	            "`" + example + "`";
-
-	        textSection
-	            .append('div')
-	            .attr('class', 'instructions-template')
-	            .html(marked_1(instructions));
+	        var meters = 35;
+	        var p1 = [origin[0] + geoMetersToLon(meters / 5, origin[1]), origin[1]];
+	        var p2 = [origin[0] + geoMetersToLon(meters / 2, origin[1]), origin[1] + geoMetersToLat(meters)];
+	        var p3 = [origin[0] - geoMetersToLon(meters / 2, origin[1]), origin[1] + geoMetersToLat(meters)];
+	        var p4 = [origin[0] - geoMetersToLon(meters / 5, origin[1]), origin[1]];
+	        var poly = [p1, p2, p3, p4, p1]; // rotate it to face forward/backward
 
-	        textSection
-	            .append('textarea')
-	            .attr('class', 'field-template')
-	            .attr('placeholder', _t('settings.custom_background.template.placeholder'))
-	            .call(utilNoAuto)
-	            .property('value', _currSettings.template);
+	        var angle = (stepBy === 1 ? ca : ca + 180) * (Math.PI / 180);
+	        poly = geoRotate(poly, -angle, origin);
+	        var extent = poly.reduce(function (extent, point) {
+	          return extent.extend(geoExtent(point));
+	        }, geoExtent()); // find nearest other bubble in the search polygon
 
+	        var minDist = Infinity;
 
-	        // insert a cancel button
-	        var buttonSection = modal.select('.modal-section.buttons');
+	        _ssCache.bubbles.rtree.search(extent.bbox()).forEach(function (d) {
+	          if (d.data.key === selected.key) return;
+	          if (!geoPointInPolygon(d.data.loc, poly)) return;
+	          var dist = geoVecLength(d.data.loc, selected.loc);
+	          var theta = selected.ca - d.data.ca;
+	          var minTheta = Math.min(Math.abs(theta), 360 - Math.abs(theta));
 
-	        buttonSection
-	            .insert('button', '.ok-button')
-	            .attr('class', 'button cancel-button secondary-action')
-	            .text(_t('confirm.cancel'));
+	          if (minTheta > 20) {
+	            dist += 5; // penalize distance if camera angles don't match
+	          }
 
+	          if (dist < minDist) {
+	            nextID = d.data.key;
+	            minDist = dist;
+	          }
+	        });
 
-	        buttonSection.select('.cancel-button')
-	            .on('click.cancel', clickCancel);
+	        var nextBubble = nextID && that.cachedImage(nextID);
+	        if (!nextBubble) return;
+	        context.map().centerEase(nextBubble.loc);
+	        that.selectImage(context, nextBubble.key).yaw(yaw).showViewer(context);
+	      };
+	    }
+	  },
+	  yaw: function yaw(_yaw) {
+	    if (typeof _yaw !== 'number') return _yaw;
+	    _sceneOptions.yaw = _yaw;
+	    return this;
+	  },
 
-	        buttonSection.select('.ok-button')
-	            .attr('disabled', isSaveDisabled)
-	            .on('click.save', clickSave);
+	  /**
+	   * showViewer()
+	   */
+	  showViewer: function showViewer(context) {
+	    var wrap = context.container().select('.photoviewer').classed('hide', false);
+	    var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();
 
+	    if (isHidden) {
+	      wrap.selectAll('.photo-wrapper:not(.ms-wrapper)').classed('hide', true);
+	      wrap.selectAll('.photo-wrapper.ms-wrapper').classed('hide', false);
+	    }
 
-	        function isSaveDisabled() {
-	            return null;
-	        }
+	    return this;
+	  },
 
+	  /**
+	   * hideViewer()
+	   */
+	  hideViewer: function hideViewer(context) {
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(null);
+	    viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+	    context.container().selectAll('.viewfield-group, .sequence, .icon-sign').classed('currentView', false);
+	    this.updateUrlImage(null);
+	    return this.setStyles(context, null, true);
+	  },
 
-	        // restore the original template
-	        function clickCancel() {
-	            textSection.select('.field-template').property('value', _origSettings.template);
-	            corePreferences('background-custom-template', _origSettings.template);
-	            this.blur();
-	            modal.close();
-	        }
+	  /**
+	   * selectImage().
+	   */
+	  selectImage: function selectImage(context, key) {
+	    var that = this;
+	    var d = this.cachedImage(key);
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(d);
+	    this.setStyles(context, null, true);
+	    var wrap = context.container().select('.photoviewer .ms-wrapper');
+	    var attribution = wrap.selectAll('.photo-attribution').html('');
+	    wrap.selectAll('.pnlm-load-box') // display "loading.."
+	    .style('display', 'block');
+	    if (!d) return this;
+	    this.updateUrlImage(key);
+	    _sceneOptions.northOffset = d.ca;
+	    var line1 = attribution.append('div').attr('class', 'attribution-row');
+	    var hiresDomId = utilUniqueDomId('streetside-hires'); // Add hires checkbox
+
+	    var label = line1.append('label').attr('for', hiresDomId).attr('class', 'streetside-hires');
+	    label.append('input').attr('type', 'checkbox').attr('id', hiresDomId).property('checked', _hires).on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      _hires = !_hires;
+	      _resolution = _hires ? 1024 : 512;
+	      wrap.call(setupCanvas, true);
+	      var viewstate = {
+	        yaw: _pannellumViewer.getYaw(),
+	        pitch: _pannellumViewer.getPitch(),
+	        hfov: _pannellumViewer.getHfov()
+	      };
+	      _sceneOptions = Object.assign(_sceneOptions, viewstate);
+	      that.selectImage(context, d.key).showViewer(context);
+	    });
+	    label.append('span').call(_t.append('streetside.hires'));
+	    var captureInfo = line1.append('div').attr('class', 'attribution-capture-info'); // Add capture date
 
-	        // accept the current template
-	        function clickSave() {
-	            _currSettings.template = textSection.select('.field-template').property('value');
-	            corePreferences('background-custom-template', _currSettings.template);
-	            this.blur();
-	            modal.close();
-	            dispatch$1.call('change', this, _currSettings);
-	        }
+	    if (d.captured_by) {
+	      var yyyy = new Date().getFullYear();
+	      captureInfo.append('a').attr('class', 'captured_by').attr('target', '_blank').attr('href', 'https://www.microsoft.com/en-us/maps/streetside').text('©' + yyyy + ' Microsoft');
+	      captureInfo.append('span').text('|');
 	    }
 
-	    return utilRebind(render, dispatch$1, 'on');
-	}
+	    if (d.captured_at) {
+	      captureInfo.append('span').attr('class', 'captured_at').text(localeTimestamp(d.captured_at));
+	    } // Add image links
 
-	function uiSectionBackgroundList(context) {
 
-	    var _backgroundList = select(null);
+	    var line2 = attribution.append('div').attr('class', 'attribution-row');
+	    line2.append('a').attr('class', 'image-view-link').attr('target', '_blank').attr('href', 'https://www.bing.com/maps?cp=' + d.loc[1] + '~' + d.loc[0] + '&lvl=17&dir=' + d.ca + '&style=x&v=2&sV=1').call(_t.append('streetside.view_on_bing'));
+	    line2.append('a').attr('class', 'image-report-link').attr('target', '_blank').attr('href', 'https://www.bing.com/maps/privacyreport/streetsideprivacyreport?bubbleid=' + encodeURIComponent(d.key) + '&focus=photo&lat=' + d.loc[1] + '&lng=' + d.loc[0] + '&z=17').call(_t.append('streetside.report'));
+	    var bubbleIdQuadKey = d.key.toString(4);
+	    var paddingNeeded = 16 - bubbleIdQuadKey.length;
 
-	    var _customSource = context.background().findSource('custom');
+	    for (var i = 0; i < paddingNeeded; i++) {
+	      bubbleIdQuadKey = '0' + bubbleIdQuadKey;
+	    }
 
-	    var _settingsCustomBackground = uiSettingsCustomBackground()
-	        .on('change', customChanged);
+	    var imgUrlPrefix = streetsideImagesApi + 'hs' + bubbleIdQuadKey;
+	    var imgUrlSuffix = '.jpg?g=6338&n=z'; // Cubemap face code order matters here: front=01, right=02, back=03, left=10, up=11, down=12
 
-	    var section = uiSection('background-list', context)
-	        .title(_t('background.backgrounds'))
-	        .disclosureContent(renderDisclosureContent);
+	    var faceKeys = ['01', '02', '03', '10', '11', '12']; // Map images to cube faces
 
-	    function previousBackgroundID() {
-	        return corePreferences('background-last-used-toggle');
-	    }
+	    var quadKeys = getQuadKeys();
+	    var faces = faceKeys.map(function (faceKey) {
+	      return quadKeys.map(function (quadKey) {
+	        var xy = qkToXY(quadKey);
+	        return {
+	          face: faceKey,
+	          url: imgUrlPrefix + faceKey + quadKey + imgUrlSuffix,
+	          x: xy[0],
+	          y: xy[1]
+	        };
+	      });
+	    });
+	    loadFaces(faces).then(function () {
+	      if (!_pannellumViewer) {
+	        that.initViewer();
+	      } else {
+	        // make a new scene
+	        _currScene += 1;
 
-	    function renderDisclosureContent(selection) {
+	        var sceneID = _currScene.toString();
 
-	        // the background list
-	        var container = selection.selectAll('.layer-background-list')
-	            .data([0]);
+	        _pannellumViewer.addScene(sceneID, _sceneOptions).loadScene(sceneID); // remove previous scene
 
-	        _backgroundList = container.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-background-list')
-	            .attr('dir', 'auto')
-	            .merge(container);
 
+	        if (_currScene > 2) {
+	          sceneID = (_currScene - 1).toString();
 
-	        // add minimap toggle below list
-	        var bgExtrasListEnter = selection.selectAll('.bg-extras-list')
-	            .data([0])
-	            .enter()
-	            .append('ul')
-	            .attr('class', 'layer-list bg-extras-list');
-
-	        var minimapLabelEnter = bgExtrasListEnter
-	            .append('li')
-	            .attr('class', 'minimap-toggle-item')
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('background.minimap.tooltip'))
-	                .keys([_t('background.minimap.key')])
-	                .placement('top')
-	            );
-
-	        minimapLabelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() {
-	                event.preventDefault();
-	                uiMapInMap.toggle();
-	            });
+	          _pannellumViewer.removeScene(sceneID);
+	        }
+	      }
+	    });
+	    return this;
+	  },
+	  getSequenceKeyForBubble: function getSequenceKeyForBubble(d) {
+	    return d && d.sequenceKey;
+	  },
+	  // Updates the currently highlighted sequence and selected bubble.
+	  // Reset is only necessary when interacting with the viewport because
+	  // this implicitly changes the currently selected bubble/sequence
+	  setStyles: function setStyles(context, hovered, reset) {
+	    if (reset) {
+	      // reset all layers
+	      context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false).classed('currentView', false);
+	      context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
+	    }
 
-	        minimapLabelEnter
-	            .append('span')
-	            .text(_t('background.minimap.description'));
-
-
-	        var panelLabelEnter = bgExtrasListEnter
-	            .append('li')
-	            .attr('class', 'background-panel-toggle-item')
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('background.panel.tooltip'))
-	                .keys([uiCmd('⌘⇧' + _t('info_panels.background.key'))])
-	                .placement('top')
-	            );
-
-	        panelLabelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() {
-	                event.preventDefault();
-	                context.ui().info.toggle('background');
-	            });
+	    var hoveredBubbleKey = hovered && hovered.key;
+	    var hoveredSequenceKey = this.getSequenceKeyForBubble(hovered);
+	    var hoveredSequence = hoveredSequenceKey && _ssCache.sequences[hoveredSequenceKey];
+	    var hoveredBubbleKeys = hoveredSequence && hoveredSequence.bubbles.map(function (d) {
+	      return d.key;
+	    }) || [];
+	    var viewer = context.container().select('.photoviewer');
+	    var selected = viewer.empty() ? undefined : viewer.datum();
+	    var selectedBubbleKey = selected && selected.key;
+	    var selectedSequenceKey = this.getSequenceKeyForBubble(selected);
+	    var selectedSequence = selectedSequenceKey && _ssCache.sequences[selectedSequenceKey];
+	    var selectedBubbleKeys = selectedSequence && selectedSequence.bubbles.map(function (d) {
+	      return d.key;
+	    }) || []; // highlight sibling viewfields on either the selected or the hovered sequences
 
-	        panelLabelEnter
-	            .append('span')
-	            .text(_t('background.panel.description'));
-
-	        var locPanelLabelEnter = bgExtrasListEnter
-	            .append('li')
-	            .attr('class', 'location-panel-toggle-item')
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('background.location_panel.tooltip'))
-	                .keys([uiCmd('⌘⇧' + _t('info_panels.location.key'))])
-	                .placement('top')
-	            );
-
-	        locPanelLabelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() {
-	                event.preventDefault();
-	                context.ui().info.toggle('location');
-	            });
+	    var highlightedBubbleKeys = utilArrayUnion(hoveredBubbleKeys, selectedBubbleKeys);
+	    context.container().selectAll('.layer-streetside-images .viewfield-group').classed('highlighted', function (d) {
+	      return highlightedBubbleKeys.indexOf(d.key) !== -1;
+	    }).classed('hovered', function (d) {
+	      return d.key === hoveredBubbleKey;
+	    }).classed('currentView', function (d) {
+	      return d.key === selectedBubbleKey;
+	    });
+	    context.container().selectAll('.layer-streetside-images .sequence').classed('highlighted', function (d) {
+	      return d.properties.key === hoveredSequenceKey;
+	    }).classed('currentView', function (d) {
+	      return d.properties.key === selectedSequenceKey;
+	    }); // update viewfields if needed
 
-	        locPanelLabelEnter
-	            .append('span')
-	            .text(_t('background.location_panel.description'));
+	    context.container().selectAll('.layer-streetside-images .viewfield-group .viewfield').attr('d', viewfieldPath);
 
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	        // "Info / Report a Problem" link
-	        selection.selectAll('.imagery-faq')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'imagery-faq')
-	            .append('a')
-	            .attr('target', '_blank')
-	            .call(svgIcon('#iD-icon-out-link', 'inline'))
-	            .attr('href', 'https://github.com/openstreetmap/iD/blob/develop/FAQ.md#how-can-i-report-an-issue-with-background-imagery')
-	            .append('span')
-	            .text(_t('background.imagery_problem_faq'));
-
-	        _backgroundList
-	            .call(drawListItems, 'radio', chooseBackground, function(d) { return !d.isHidden() && !d.overlay; });
-	    }
-
-	    function setTooltips(selection) {
-	        selection.each(function(d, i, nodes) {
-	            var item = select(this).select('label');
-	            var span = item.select('span');
-	            var placement = (i < nodes.length / 2) ? 'bottom' : 'top';
-	            var description = d.description();
-	            var isOverflowing = (span.property('clientWidth') !== span.property('scrollWidth'));
-
-	            item.call(uiTooltip().destroyAny);
-
-	            if (d.id === previousBackgroundID()) {
-	                item.call(uiTooltip()
-	                    .placement(placement)
-	                    .title('<div>' + _t('background.switch') + '</div>')
-	                    .keys([uiCmd('⌘' + _t('background.key'))])
-	                );
-	            } else if (description || isOverflowing) {
-	                item.call(uiTooltip()
-	                    .placement(placement)
-	                    .title(description || d.name())
-	                );
-	            }
-	        });
+	      if (d.pano && d.key !== selectedBubbleKey) {
+	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+	      } else {
+	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	      }
 	    }
 
-	    function drawListItems(layerList, type, change, filter) {
-	        var sources = context.background()
-	            .sources(context.map().extent(), context.map().zoom(), true)
-	            .filter(filter);
-
-	        var layerLinks = layerList.selectAll('li')
-	            .data(sources, function(d) { return d.name(); });
+	    return this;
+	  },
+	  updateUrlImage: function updateUrlImage(imageKey) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	        layerLinks.exit()
-	            .remove();
+	      if (imageKey) {
+	        hash.photo = 'streetside/' + imageKey;
+	      } else {
+	        delete hash.photo;
+	      }
 
-	        var enter = layerLinks.enter()
-	            .append('li')
-	            .classed('layer-custom', function(d) { return d.id === 'custom'; })
-	            .classed('best', function(d) { return d.best(); });
+	      window.location.replace('#' + utilQsString(hash, true));
+	    }
+	  },
 
-	        var label = enter
-	            .append('label');
+	  /**
+	   * cache().
+	   */
+	  cache: function cache() {
+	    return _ssCache;
+	  }
+	};
 
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', 'layers')
-	            .on('change', change);
+	var _apibase = 'https://taginfo.openstreetmap.org/api/4/';
+	var _inflight = {};
+	var _popularKeys = {};
+	var _taginfoCache = {};
+	var tag_sorts = {
+	  point: 'count_nodes',
+	  vertex: 'count_nodes',
+	  area: 'count_ways',
+	  line: 'count_ways'
+	};
+	var tag_sort_members = {
+	  point: 'count_node_members',
+	  vertex: 'count_node_members',
+	  area: 'count_way_members',
+	  line: 'count_way_members',
+	  relation: 'count_relation_members'
+	};
+	var tag_filters = {
+	  point: 'nodes',
+	  vertex: 'nodes',
+	  area: 'ways',
+	  line: 'ways'
+	};
+	var tag_members_fractions = {
+	  point: 'count_node_members_fraction',
+	  vertex: 'count_node_members_fraction',
+	  area: 'count_way_members_fraction',
+	  line: 'count_way_members_fraction',
+	  relation: 'count_relation_members_fraction'
+	};
 
-	        label
-	            .append('span')
-	            .text(function(d) { return d.name(); });
+	function sets(params, n, o) {
+	  if (params.geometry && o[params.geometry]) {
+	    params[n] = o[params.geometry];
+	  }
 
-	        enter.filter(function(d) { return d.id === 'custom'; })
-	            .append('button')
-	            .attr('class', 'layer-browse')
-	            .call(uiTooltip()
-	                .title(_t('settings.custom_background.tooltip'))
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            )
-	            .on('click', editCustom)
-	            .call(svgIcon('#iD-icon-more'));
+	  return params;
+	}
 
-	        enter.filter(function(d) { return d.best(); })
-	            .append('div')
-	            .attr('class', 'best')
-	            .call(uiTooltip()
-	                .title(_t('background.best_imagery'))
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            )
-	            .append('span')
-	            .html('&#9733;');
+	function setFilter(params) {
+	  return sets(params, 'filter', tag_filters);
+	}
 
+	function setSort(params) {
+	  return sets(params, 'sortname', tag_sorts);
+	}
 
-	        layerList.selectAll('li')
-	            .sort(sortSources);
+	function setSortMembers(params) {
+	  return sets(params, 'sortname', tag_sort_members);
+	}
 
-	        layerList
-	            .call(updateLayerSelections);
+	function clean(params) {
+	  return utilObjectOmit(params, ['geometry', 'debounce']);
+	}
 
+	function filterKeys(type) {
+	  var count_type = type ? 'count_' + type : 'count_all';
+	  return function (d) {
+	    return parseFloat(d[count_type]) > 2500 || d.in_wiki;
+	  };
+	}
 
-	        function sortSources(a, b) {
-	            return a.best() && !b.best() ? -1
-	                : b.best() && !a.best() ? 1
-	                : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
-	        }
-	    }
+	function filterMultikeys(prefix) {
+	  return function (d) {
+	    // d.key begins with prefix, and d.key contains no additional ':'s
+	    var re = new RegExp('^' + prefix + '(.*)$');
+	    var matches = d.key.match(re) || [];
+	    return matches.length === 2 && matches[1].indexOf(':') === -1;
+	  };
+	}
 
-	    function updateLayerSelections(selection) {
-	        function active(d) {
-	            return context.background().showsLayer(d);
-	        }
+	function filterValues(allowUpperCase) {
+	  return function (d) {
+	    if (d.value.match(/[;,]/) !== null) return false; // exclude some punctuation
 
-	        selection.selectAll('li')
-	            .classed('active', active)
-	            .classed('switch', function(d) { return d.id === previousBackgroundID(); })
-	            .call(setTooltips)
-	            .selectAll('input')
-	            .property('checked', active);
-	    }
+	    if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) return false; // exclude uppercase letters
 
+	    return parseFloat(d.fraction) > 0.0;
+	  };
+	}
 
-	    function chooseBackground(d) {
-	        if (d.id === 'custom' && !d.template()) {
-	            return editCustom();
-	        }
+	function filterRoles(geometry) {
+	  return function (d) {
+	    if (d.role === '') return false; // exclude empty role
 
-	        event.preventDefault();
-	        var previousBackground = context.background().baseLayerSource();
-	        corePreferences('background-last-used-toggle', previousBackground.id);
-	        corePreferences('background-last-used', d.id);
-	        context.background().baseLayerSource(d);
-	        document.activeElement.blur();
-	    }
+	    if (d.role.match(/[A-Z*;,]/) !== null) return false; // exclude uppercase letters and some punctuation
 
+	    return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
+	  };
+	}
 
-	    function customChanged(d) {
-	        if (d && d.template) {
-	            _customSource.template(d.template);
-	            chooseBackground(_customSource);
-	        } else {
-	            _customSource.template('');
-	            chooseBackground(context.background().findSource('none'));
-	        }
-	    }
+	function valKey(d) {
+	  return {
+	    value: d.key,
+	    title: d.key
+	  };
+	}
 
+	function valKeyDescription(d) {
+	  var obj = {
+	    value: d.value,
+	    title: d.description || d.value
+	  };
 
-	    function editCustom() {
-	        event.preventDefault();
-	        context.container()
-	            .call(_settingsCustomBackground);
-	    }
+	  if (d.count) {
+	    obj.count = d.count;
+	  }
 
+	  return obj;
+	}
 
-	    context.background()
-	        .on('change.background_list', function() {
-	            _backgroundList.call(updateLayerSelections);
-	        });
+	function roleKey(d) {
+	  return {
+	    value: d.role,
+	    title: d.role
+	  };
+	} // sort keys with ':' lower than keys without ':'
 
-	    context.map()
-	        .on('move.background_list',
-	            debounce(function() {
-	                // layers in-view may have changed due to map move
-	                window.requestIdleCallback(section.reRender);
-	            }, 1000)
-	        );
 
-	    return section;
+	function sortKeys(a, b) {
+	  return a.key.indexOf(':') === -1 && b.key.indexOf(':') !== -1 ? -1 : a.key.indexOf(':') !== -1 && b.key.indexOf(':') === -1 ? 1 : 0;
 	}
 
-	function uiSectionBackgroundOffset(context) {
+	var debouncedRequest = debounce(request, 300, {
+	  leading: false
+	});
 
-	    var section = uiSection('background-offset', context)
-	        .title(_t('background.fix_misalignment'))
-	        .disclosureContent(renderDisclosureContent)
-	        .expandedByDefault(false);
+	function request(url, params, exactMatch, callback, loaded) {
+	  if (_inflight[url]) return;
+	  if (checkCache(url, params, exactMatch, callback)) return;
+	  var controller = new AbortController();
+	  _inflight[url] = controller;
+	  d3_json(url, {
+	    signal: controller.signal
+	  }).then(function (result) {
+	    delete _inflight[url];
+	    if (loaded) loaded(null, result);
+	  })["catch"](function (err) {
+	    delete _inflight[url];
+	    if (err.name === 'AbortError') return;
+	    if (loaded) loaded(err.message);
+	  });
+	}
 
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	function checkCache(url, params, exactMatch, callback) {
+	  var rp = params.rp || 25;
+	  var testQuery = params.query || '';
+	  var testUrl = url;
 
-	    var _directions = [
-	        ['right', [0.5, 0]],
-	        ['top', [0, -0.5]],
-	        ['left', [-0.5, 0]],
-	        ['bottom', [0, 0.5]]
-	    ];
+	  do {
+	    var hit = _taginfoCache[testUrl]; // exact match, or shorter match yielding fewer than max results (rp)
 
+	    if (hit && (url === testUrl || hit.length < rp)) {
+	      callback(null, hit);
+	      return true;
+	    } // don't try to shorten the query
 
-	    function cancelEvent() {
-	        event.stopPropagation();
-	        event.preventDefault();
-	    }
 
+	    if (exactMatch || !testQuery.length) return false; // do shorten the query to see if we already have a cached result
+	    // that has returned fewer than max results (rp)
 
-	    function updateValue() {
-	        var meters = geoOffsetToMeters(context.background().offset());
-	        var x = +meters[0].toFixed(2);
-	        var y = +meters[1].toFixed(2);
+	    testQuery = testQuery.slice(0, -1);
+	    testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
+	  } while (testQuery.length >= 0);
 
-	        context.container().selectAll('.nudge-inner-rect')
-	            .select('input')
-	            .classed('error', false)
-	            .property('value', x + ', ' + y);
+	  return false;
+	}
 
-	        context.container().selectAll('.nudge-reset')
-	            .classed('disabled', function() {
-	                return (x === 0 && y === 0);
-	            });
-	    }
+	var serviceTaginfo = {
+	  init: function init() {
+	    _inflight = {};
+	    _taginfoCache = {};
+	    _popularKeys = {
+	      // manually exclude some keys – #5377, #7485
+	      postal_code: true,
+	      full_name: true,
+	      loc_name: true,
+	      reg_name: true,
+	      short_name: true,
+	      sorting_name: true,
+	      artist_name: true,
+	      nat_name: true,
+	      long_name: true,
+	      'bridge:name': true
+	    }; // Fetch popular keys.  We'll exclude these from `values`
+	    // lookups because they stress taginfo, and they aren't likely
+	    // to yield meaningful autocomplete results.. see #3955
 
+	    var params = {
+	      rp: 100,
+	      sortname: 'values_all',
+	      sortorder: 'desc',
+	      page: 1,
+	      debounce: false,
+	      lang: _mainLocalizer.languageCode()
+	    };
+	    this.keys(params, function (err, data) {
+	      if (err) return;
+	      data.forEach(function (d) {
+	        if (d.value === 'opening_hours') return; // exception
+
+	        _popularKeys[d.value] = true;
+	      });
+	    });
+	  },
+	  reset: function reset() {
+	    Object.values(_inflight).forEach(function (controller) {
+	      controller.abort();
+	    });
+	    _inflight = {};
+	  },
+	  keys: function keys(params, callback) {
+	    var doRequest = params.debounce ? debouncedRequest : request;
+	    params = clean(setSort(params));
+	    params = Object.assign({
+	      rp: 10,
+	      sortname: 'count_all',
+	      sortorder: 'desc',
+	      page: 1,
+	      lang: _mainLocalizer.languageCode()
+	    }, params);
+	    var url = _apibase + 'keys/all?' + utilQsString(params);
+	    doRequest(url, params, false, callback, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else {
+	        var f = filterKeys(params.filter);
+	        var result = d.data.filter(f).sort(sortKeys).map(valKey);
+	        _taginfoCache[url] = result;
+	        callback(null, result);
+	      }
+	    });
+	  },
+	  multikeys: function multikeys(params, callback) {
+	    var doRequest = params.debounce ? debouncedRequest : request;
+	    params = clean(setSort(params));
+	    params = Object.assign({
+	      rp: 25,
+	      sortname: 'count_all',
+	      sortorder: 'desc',
+	      page: 1,
+	      lang: _mainLocalizer.languageCode()
+	    }, params);
+	    var prefix = params.query;
+	    var url = _apibase + 'keys/all?' + utilQsString(params);
+	    doRequest(url, params, true, callback, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else {
+	        var f = filterMultikeys(prefix);
+	        var result = d.data.filter(f).map(valKey);
+	        _taginfoCache[url] = result;
+	        callback(null, result);
+	      }
+	    });
+	  },
+	  values: function values(params, callback) {
+	    // Exclude popular keys from values lookups.. see #3955
+	    var key = params.key;
 
-	    function resetOffset() {
-	        context.background().offset([0, 0]);
-	        updateValue();
+	    if (key && _popularKeys[key]) {
+	      callback(null, []);
+	      return;
 	    }
 
+	    var doRequest = params.debounce ? debouncedRequest : request;
+	    params = clean(setSort(setFilter(params)));
+	    params = Object.assign({
+	      rp: 25,
+	      sortname: 'count_all',
+	      sortorder: 'desc',
+	      page: 1,
+	      lang: _mainLocalizer.languageCode()
+	    }, params);
+	    var url = _apibase + 'key/values?' + utilQsString(params);
+	    doRequest(url, params, false, callback, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else {
+	        // In most cases we prefer taginfo value results with lowercase letters.
+	        // A few OSM keys expect values to contain uppercase values (see #3377).
+	        // This is not an exhaustive list (e.g. `name` also has uppercase values)
+	        // but these are the fields where taginfo value lookup is most useful.
+	        var re = /network|taxon|genus|species|brand|grape_variety|royal_cypher|listed_status|booth|rating|stars|:output|_hours|_times|_ref|manufacturer|country|target|brewery|cai_scale/;
+	        var allowUpperCase = re.test(params.key);
+	        var f = filterValues(allowUpperCase);
+	        var result = d.data.filter(f).map(valKeyDescription);
+	        _taginfoCache[url] = result;
+	        callback(null, result);
+	      }
+	    });
+	  },
+	  roles: function roles(params, callback) {
+	    var doRequest = params.debounce ? debouncedRequest : request;
+	    var geometry = params.geometry;
+	    params = clean(setSortMembers(params));
+	    params = Object.assign({
+	      rp: 25,
+	      sortname: 'count_all_members',
+	      sortorder: 'desc',
+	      page: 1,
+	      lang: _mainLocalizer.languageCode()
+	    }, params);
+	    var url = _apibase + 'relation/roles?' + utilQsString(params);
+	    doRequest(url, params, true, callback, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else {
+	        var f = filterRoles(geometry);
+	        var result = d.data.filter(f).map(roleKey);
+	        _taginfoCache[url] = result;
+	        callback(null, result);
+	      }
+	    });
+	  },
+	  docs: function docs(params, callback) {
+	    var doRequest = params.debounce ? debouncedRequest : request;
+	    params = clean(setSort(params));
+	    var path = 'key/wiki_pages?';
 
-	    function nudge(d) {
-	        context.background().nudge(d, context.map().zoom());
-	        updateValue();
+	    if (params.value) {
+	      path = 'tag/wiki_pages?';
+	    } else if (params.rtype) {
+	      path = 'relation/wiki_pages?';
 	    }
 
+	    var url = _apibase + path + utilQsString(params);
+	    doRequest(url, params, true, callback, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else {
+	        _taginfoCache[url] = d.data;
+	        callback(null, d.data);
+	      }
+	    });
+	  },
+	  apibase: function apibase(_) {
+	    if (!arguments.length) return _apibase;
+	    _apibase = _;
+	    return this;
+	  }
+	};
 
-	    function pointerdownNudgeButton(d) {
-	        var interval;
-	        var timeout = window.setTimeout(function() {
-	                interval = window.setInterval(nudge.bind(null, d), 100);
-	            }, 500);
+	/**
+	 * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
+	 *
+	 * @name feature
+	 * @param {Geometry} geometry input geometry
+	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	 * @param {Object} [options={}] Optional Parameters
+	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	 * @param {string|number} [options.id] Identifier associated with the Feature
+	 * @returns {Feature} a GeoJSON Feature
+	 * @example
+	 * var geometry = {
+	 *   "type": "Point",
+	 *   "coordinates": [110, 50]
+	 * };
+	 *
+	 * var feature = turf.feature(geometry);
+	 *
+	 * //=feature
+	 */
 
-	        function doneNudge() {
-	            window.clearTimeout(timeout);
-	            window.clearInterval(interval);
-	            select(window)
-	                .on(_pointerPrefix + 'up.buttonoffset', null, true)
-	                .on(_pointerPrefix + 'down.buttonoffset', null, true);
-	        }
+	function feature(geom, properties, options) {
+	  if (options === void 0) {
+	    options = {};
+	  }
 
-	        select(window)
-	            .on(_pointerPrefix + 'up.buttonoffset', doneNudge, true)
-	            .on(_pointerPrefix + 'down.buttonoffset', doneNudge, true);
+	  var feat = {
+	    type: "Feature"
+	  };
 
-	        nudge(d);
-	    }
+	  if (options.id === 0 || options.id) {
+	    feat.id = options.id;
+	  }
 
+	  if (options.bbox) {
+	    feat.bbox = options.bbox;
+	  }
 
-	    function inputOffset() {
-	        var input = select(this);
-	        var d = input.node().value;
+	  feat.properties = properties || {};
+	  feat.geometry = geom;
+	  return feat;
+	}
+	/**
+	 * Creates a {@link Polygon} {@link Feature} from an Array of LinearRings.
+	 *
+	 * @name polygon
+	 * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
+	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	 * @param {Object} [options={}] Optional Parameters
+	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	 * @param {string|number} [options.id] Identifier associated with the Feature
+	 * @returns {Feature<Polygon>} Polygon Feature
+	 * @example
+	 * var polygon = turf.polygon([[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]], { name: 'poly1' });
+	 *
+	 * //=polygon
+	 */
 
-	        if (d === '') { return resetOffset(); }
+	function polygon(coordinates, properties, options) {
+	  if (options === void 0) {
+	    options = {};
+	  }
 
-	        d = d.replace(/;/g, ',').split(',').map(function(n) {
-	            // if n is NaN, it will always get mapped to false.
-	            return !isNaN(n) && n;
-	        });
+	  for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
+	    var ring = coordinates_1[_i];
 
-	        if (d.length !== 2 || !d[0] || !d[1]) {
-	            input.classed('error', true);
-	            return;
-	        }
+	    if (ring.length < 4) {
+	      throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
+	    }
 
-	        context.background().offset(geoMetersToOffset(d));
-	        updateValue();
+	    for (var j = 0; j < ring[ring.length - 1].length; j++) {
+	      // Check if first point of Polygon contains two numbers
+	      if (ring[ring.length - 1][j] !== ring[0][j]) {
+	        throw new Error("First and last Position are not equivalent.");
+	      }
 	    }
+	  }
+
+	  var geom = {
+	    type: "Polygon",
+	    coordinates: coordinates
+	  };
+	  return feature(geom, properties, options);
+	}
+	/**
+	 * Creates a {@link LineString} {@link Feature} from an Array of Positions.
+	 *
+	 * @name lineString
+	 * @param {Array<Array<number>>} coordinates an array of Positions
+	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	 * @param {Object} [options={}] Optional Parameters
+	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	 * @param {string|number} [options.id] Identifier associated with the Feature
+	 * @returns {Feature<LineString>} LineString Feature
+	 * @example
+	 * var linestring1 = turf.lineString([[-24, 63], [-23, 60], [-25, 65], [-20, 69]], {name: 'line 1'});
+	 * var linestring2 = turf.lineString([[-14, 43], [-13, 40], [-15, 45], [-10, 49]], {name: 'line 2'});
+	 *
+	 * //=linestring1
+	 * //=linestring2
+	 */
 
+	function lineString(coordinates, properties, options) {
+	  if (options === void 0) {
+	    options = {};
+	  }
 
-	    function dragOffset() {
-	        if (event.button !== 0) { return; }
+	  if (coordinates.length < 2) {
+	    throw new Error("coordinates must be an array of two or more positions");
+	  }
 
-	        var origin = [event.clientX, event.clientY];
+	  var geom = {
+	    type: "LineString",
+	    coordinates: coordinates
+	  };
+	  return feature(geom, properties, options);
+	}
+	/**
+	 * Creates a {@link Feature<MultiLineString>} based on a
+	 * coordinate array. Properties can be added optionally.
+	 *
+	 * @name multiLineString
+	 * @param {Array<Array<Array<number>>>} coordinates an array of LineStrings
+	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	 * @param {Object} [options={}] Optional Parameters
+	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	 * @param {string|number} [options.id] Identifier associated with the Feature
+	 * @returns {Feature<MultiLineString>} a MultiLineString feature
+	 * @throws {Error} if no coordinates are passed
+	 * @example
+	 * var multiLine = turf.multiLineString([[[0,0],[10,10]]]);
+	 *
+	 * //=multiLine
+	 */
 
-	        var pointerId = event.pointerId || 'mouse';
+	function multiLineString(coordinates, properties, options) {
+	  if (options === void 0) {
+	    options = {};
+	  }
 
-	        context.container()
-	            .append('div')
-	            .attr('class', 'nudge-surface');
+	  var geom = {
+	    type: "MultiLineString",
+	    coordinates: coordinates
+	  };
+	  return feature(geom, properties, options);
+	}
+	/**
+	 * Creates a {@link Feature<MultiPolygon>} based on a
+	 * coordinate array. Properties can be added optionally.
+	 *
+	 * @name multiPolygon
+	 * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygons
+	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	 * @param {Object} [options={}] Optional Parameters
+	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	 * @param {string|number} [options.id] Identifier associated with the Feature
+	 * @returns {Feature<MultiPolygon>} a multipolygon feature
+	 * @throws {Error} if no coordinates are passed
+	 * @example
+	 * var multiPoly = turf.multiPolygon([[[[0,0],[0,10],[10,10],[10,0],[0,0]]]]);
+	 *
+	 * //=multiPoly
+	 *
+	 */
 
-	        select(window)
-	            .on(_pointerPrefix + 'move.drag-bg-offset', pointermove)
-	            .on(_pointerPrefix + 'up.drag-bg-offset', pointerup);
+	function multiPolygon(coordinates, properties, options) {
+	  if (options === void 0) {
+	    options = {};
+	  }
 
-	        if (_pointerPrefix === 'pointer') {
-	            select(window)
-	                .on('pointercancel.drag-bg-offset', pointerup);
-	        }
+	  var geom = {
+	    type: "MultiPolygon",
+	    coordinates: coordinates
+	  };
+	  return feature(geom, properties, options);
+	}
 
-	        function pointermove() {
-	            if (pointerId !== (event.pointerId || 'mouse')) { return; }
+	/**
+	 * Get Geometry from Feature or Geometry Object
+	 *
+	 * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
+	 * @returns {Geometry|null} GeoJSON Geometry Object
+	 * @throws {Error} if geojson is not a Feature or Geometry Object
+	 * @example
+	 * var point = {
+	 *   "type": "Feature",
+	 *   "properties": {},
+	 *   "geometry": {
+	 *     "type": "Point",
+	 *     "coordinates": [110, 40]
+	 *   }
+	 * }
+	 * var geom = turf.getGeom(point)
+	 * //={"type": "Point", "coordinates": [110, 40]}
+	 */
 
-	            var latest = [event.clientX, event.clientY];
-	            var d = [
-	                -(origin[0] - latest[0]) / 4,
-	                -(origin[1] - latest[1]) / 4
-	            ];
+	function getGeom(geojson) {
+	  if (geojson.type === "Feature") {
+	    return geojson.geometry;
+	  }
 
-	            origin = latest;
-	            nudge(d);
-	        }
+	  return geojson;
+	}
 
-	        function pointerup() {
-	            if (pointerId !== (event.pointerId || 'mouse')) { return; }
-	            if (event.button !== 0) { return; }
+	// Cohen-Sutherland line clipping algorithm, adapted to efficiently
+	// handle polylines rather than just segments
+	function lineclip(points, bbox, result) {
+	  var len = points.length,
+	      codeA = bitCode(points[0], bbox),
+	      part = [],
+	      i,
+	      codeB,
+	      lastCode;
+	  var a;
+	  var b;
+	  if (!result) result = [];
 
-	            context.container().selectAll('.nudge-surface')
-	                .remove();
+	  for (i = 1; i < len; i++) {
+	    a = points[i - 1];
+	    b = points[i];
+	    codeB = lastCode = bitCode(b, bbox);
 
-	            select(window)
-	                .on('.drag-bg-offset', null);
+	    while (true) {
+	      if (!(codeA | codeB)) {
+	        // accept
+	        part.push(a);
+
+	        if (codeB !== lastCode) {
+	          // segment went outside
+	          part.push(b);
+
+	          if (i < len - 1) {
+	            // start a new line
+	            result.push(part);
+	            part = [];
+	          }
+	        } else if (i === len - 1) {
+	          part.push(b);
 	        }
-	    }
-
 
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.nudge-container')
-	            .data([0]);
+	        break;
+	      } else if (codeA & codeB) {
+	        // trivial reject
+	        break;
+	      } else if (codeA) {
+	        // a outside, intersect with clip edge
+	        a = intersect(a, b, codeA, bbox);
+	        codeA = bitCode(a, bbox);
+	      } else {
+	        // b outside
+	        b = intersect(a, b, codeB, bbox);
+	        codeB = bitCode(b, bbox);
+	      }
+	    }
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'nudge-container cf');
+	    codeA = lastCode;
+	  }
 
-	        containerEnter
-	            .append('div')
-	            .attr('class', 'nudge-instructions')
-	            .text(_t('background.offset'));
+	  if (part.length) result.push(part);
+	  return result;
+	} // Sutherland-Hodgeman polygon clipping algorithm
 
-	        var nudgeEnter = containerEnter
-	            .append('div')
-	            .attr('class', 'nudge-outer-rect')
-	            .on(_pointerPrefix + 'down', dragOffset);
+	function polygonclip(points, bbox) {
+	  var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
 
-	        nudgeEnter
-	            .append('div')
-	            .attr('class', 'nudge-inner-rect')
-	            .append('input')
-	            .on('change', inputOffset);
+	  for (edge = 1; edge <= 8; edge *= 2) {
+	    result = [];
+	    prev = points[points.length - 1];
+	    prevInside = !(bitCode(prev, bbox) & edge);
 
-	        containerEnter
-	            .append('div')
-	            .selectAll('button')
-	            .data(_directions).enter()
-	            .append('button')
-	            .attr('class', function(d) { return d[0] + ' nudge'; })
-	            .on('contextmenu', cancelEvent)
-	            .on(_pointerPrefix + 'down', function(d) {
-	                if (event.button !== 0) { return; }
-	                pointerdownNudgeButton(d[1]);
-	            });
+	    for (i = 0; i < points.length; i++) {
+	      p = points[i];
+	      inside = !(bitCode(p, bbox) & edge); // if segment goes through the clip window, add an intersection
 
-	        containerEnter
-	            .append('button')
-	            .attr('title', _t('background.reset'))
-	            .attr('class', 'nudge-reset disabled')
-	            .on('contextmenu', cancelEvent)
-	            .on('click', function() {
-	                event.preventDefault();
-	                if (event.button !== 0) { return; }
-	                resetOffset();
-	            })
-	            .call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
+	      if (inside !== prevInside) result.push(intersect(prev, p, edge, bbox));
+	      if (inside) result.push(p); // add a point if it's inside
 
-	        updateValue();
+	      prev = p;
+	      prevInside = inside;
 	    }
 
-	    context.background()
-	        .on('change.backgroundOffset-update', updateValue);
-
-	    return section;
-	}
-
-	function uiSectionOverlayList(context) {
-
-	    var section = uiSection('overlay-list', context)
-	        .title(_t('background.overlays'))
-	        .disclosureContent(renderDisclosureContent);
+	    points = result;
+	    if (!points.length) break;
+	  }
 
-	    var _overlayList = select(null);
+	  return result;
+	} // intersect a segment against one of the 4 lines that make up the bbox
 
-	    function setTooltips(selection) {
-	        selection.each(function(d, i, nodes) {
-	            var item = select(this).select('label');
-	            var span = item.select('span');
-	            var placement = (i < nodes.length / 2) ? 'bottom' : 'top';
-	            var description = d.description();
-	            var isOverflowing = (span.property('clientWidth') !== span.property('scrollWidth'));
+	function intersect(a, b, edge, bbox) {
+	  return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] // top
+	  : edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] // bottom
+	  : edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] // right
+	  : edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] // left
+	  : null;
+	} // bit code reflects the point position relative to the bbox:
+	//         left  mid  right
+	//    top  1001  1000  1010
+	//    mid  0001  0000  0010
+	// bottom  0101  0100  0110
 
-	            item.call(uiTooltip().destroyAny);
 
-	            if (description || isOverflowing) {
-	                item.call(uiTooltip()
-	                    .placement(placement)
-	                    .title(description || d.name())
-	                );
-	            }
-	        });
-	    }
+	function bitCode(p, bbox) {
+	  var code = 0;
+	  if (p[0] < bbox[0]) code |= 1; // left
+	  else if (p[0] > bbox[2]) code |= 2; // right
 
-	    function updateLayerSelections(selection) {
-	        function active(d) {
-	            return context.background().showsLayer(d);
-	        }
+	  if (p[1] < bbox[1]) code |= 4; // bottom
+	  else if (p[1] > bbox[3]) code |= 8; // top
 
-	        selection.selectAll('li')
-	            .classed('active', active)
-	            .call(setTooltips)
-	            .selectAll('input')
-	            .property('checked', active);
-	    }
+	  return code;
+	}
 
+	/**
+	 * Takes a {@link Feature} and a bbox and clips the feature to the bbox using
+	 * [lineclip](https://github.com/mapbox/lineclip).
+	 * May result in degenerate edges when clipping Polygons.
+	 *
+	 * @name bboxClip
+	 * @param {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature feature to clip to the bbox
+	 * @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
+	 * @returns {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} clipped Feature
+	 * @example
+	 * var bbox = [0, 0, 10, 10];
+	 * var poly = turf.polygon([[[2, 2], [8, 4], [12, 8], [3, 7], [2, 2]]]);
+	 *
+	 * var clipped = turf.bboxClip(poly, bbox);
+	 *
+	 * //addToMap
+	 * var addToMap = [bbox, poly, clipped]
+	 */
 
-	    function chooseOverlay(d) {
-	        event.preventDefault();
-	        context.background().toggleOverlayLayer(d);
-	        _overlayList.call(updateLayerSelections);
-	        document.activeElement.blur();
-	    }
+	function bboxClip(feature, bbox) {
+	  var geom = getGeom(feature);
+	  var type = geom.type;
+	  var properties = feature.type === "Feature" ? feature.properties : {};
+	  var coords = geom.coordinates;
 
-	    function drawListItems(layerList, type, change, filter) {
-	        var sources = context.background()
-	            .sources(context.map().extent(), context.map().zoom(), true)
-	            .filter(filter);
+	  switch (type) {
+	    case "LineString":
+	    case "MultiLineString":
+	      {
+	        var lines_1 = [];
 
-	        var layerLinks = layerList.selectAll('li')
-	            .data(sources, function(d) { return d.name(); });
+	        if (type === "LineString") {
+	          coords = [coords];
+	        }
 
-	        layerLinks.exit()
-	            .remove();
+	        coords.forEach(function (line) {
+	          lineclip(line, bbox, lines_1);
+	        });
 
-	        var enter = layerLinks.enter()
-	            .append('li');
+	        if (lines_1.length === 1) {
+	          return lineString(lines_1[0], properties);
+	        }
 
-	        var label = enter
-	            .append('label');
+	        return multiLineString(lines_1, properties);
+	      }
 
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', 'layers')
-	            .on('change', change);
+	    case "Polygon":
+	      return polygon(clipPolygon(coords, bbox), properties);
 
-	        label
-	            .append('span')
-	            .text(function(d) { return d.name(); });
+	    case "MultiPolygon":
+	      return multiPolygon(coords.map(function (poly) {
+	        return clipPolygon(poly, bbox);
+	      }), properties);
 
+	    default:
+	      throw new Error("geometry " + type + " not supported");
+	  }
+	}
 
-	        layerList.selectAll('li')
-	            .sort(sortSources);
+	function clipPolygon(rings, bbox) {
+	  var outRings = [];
 
-	        layerList
-	            .call(updateLayerSelections);
+	  for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
+	    var ring = rings_1[_i];
+	    var clipped = polygonclip(ring, bbox);
 
+	    if (clipped.length > 0) {
+	      if (clipped[0][0] !== clipped[clipped.length - 1][0] || clipped[0][1] !== clipped[clipped.length - 1][1]) {
+	        clipped.push(clipped[0]);
+	      }
 
-	        function sortSources(a, b) {
-	            return a.best() && !b.best() ? -1
-	                : b.best() && !a.best() ? 1
-	                : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
-	        }
+	      if (clipped.length >= 4) {
+	        outRings.push(clipped);
+	      }
 	    }
+	  }
 
-	    function renderDisclosureContent(selection) {
-
-	        var container = selection.selectAll('.layer-overlay-list')
-	            .data([0]);
-
-	        _overlayList = container.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-overlay-list')
-	            .attr('dir', 'auto')
-	            .merge(container);
+	  return outRings;
+	}
 
-	        _overlayList
-	            .call(drawListItems, 'checkbox', chooseOverlay, function(d) { return !d.isHidden() && d.overlay; });
-	    }
+	var tiler = utilTiler().tileSize(512).margin(1);
+	var dispatch = dispatch$8('loadedData');
 
-	    context.map()
-	        .on('move.overlay_list',
-	            debounce(function() {
-	                // layers in-view may have changed due to map move
-	                window.requestIdleCallback(section.reRender);
-	            }, 1000)
-	        );
+	var _vtCache;
 
-	    return section;
+	function abortRequest(controller) {
+	  controller.abort();
 	}
 
-	function uiPaneBackground(context) {
-
-	    var backgroundPane = uiPane('background', context)
-	        .key(_t('background.key'))
-	        .title(_t('background.title'))
-	        .description(_t('background.description'))
-	        .iconName('iD-icon-layers')
-	        .sections([
-	            uiSectionBackgroundList(context),
-	            uiSectionOverlayList(context),
-	            uiSectionBackgroundDisplayOptions(context),
-	            uiSectionBackgroundOffset(context)
-	        ]);
+	function vtToGeoJSON(data, tile, mergeCache) {
+	  var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
+	  var layers = Object.keys(vectorTile$1.layers);
 
-	    return backgroundPane;
-	}
+	  if (!Array.isArray(layers)) {
+	    layers = [layers];
+	  }
 
-	function uiPaneHelp(context) {
+	  var features = [];
+	  layers.forEach(function (layerID) {
+	    var layer = vectorTile$1.layers[layerID];
 
-	    var docKeys = [
-	        ['help', [
-	            'welcome',
-	            'open_data_h',
-	            'open_data',
-	            'before_start_h',
-	            'before_start',
-	            'open_source_h',
-	            'open_source',
-	            'open_source_help'
-	        ]],
-	        ['overview', [
-	            'navigation_h',
-	            'navigation_drag',
-	            'navigation_zoom',
-	            'features_h',
-	            'features',
-	            'nodes_ways'
-	        ]],
-	        ['editing', [
-	            'select_h',
-	            'select_left_click',
-	            'select_right_click',
-	            'select_space',
-	            'multiselect_h',
-	            'multiselect',
-	            'multiselect_shift_click',
-	            'multiselect_lasso',
-	            'undo_redo_h',
-	            'undo_redo',
-	            'save_h',
-	            'save',
-	            'save_validation',
-	            'upload_h',
-	            'upload',
-	            'backups_h',
-	            'backups',
-	            'keyboard_h',
-	            'keyboard'
-	        ]],
-	        ['feature_editor', [
-	            'intro',
-	            'definitions',
-	            'type_h',
-	            'type',
-	            'type_picker',
-	            'fields_h',
-	            'fields_all_fields',
-	            'fields_example',
-	            'fields_add_field',
-	            'tags_h',
-	            'tags_all_tags',
-	            'tags_resources'
-	        ]],
-	        ['points', [
-	            'intro',
-	            'add_point_h',
-	            'add_point',
-	            'add_point_finish',
-	            'move_point_h',
-	            'move_point',
-	            'delete_point_h',
-	            'delete_point',
-	            'delete_point_command'
-	        ]],
-	        ['lines', [
-	            'intro',
-	            'add_line_h',
-	            'add_line',
-	            'add_line_draw',
-	            'add_line_continue',
-	            'add_line_finish',
-	            'modify_line_h',
-	            'modify_line_dragnode',
-	            'modify_line_addnode',
-	            'connect_line_h',
-	            'connect_line',
-	            'connect_line_display',
-	            'connect_line_drag',
-	            'connect_line_tag',
-	            'disconnect_line_h',
-	            'disconnect_line_command',
-	            'move_line_h',
-	            'move_line_command',
-	            'move_line_connected',
-	            'delete_line_h',
-	            'delete_line',
-	            'delete_line_command'
-	        ]],
-	        ['areas', [
-	            'intro',
-	            'point_or_area_h',
-	            'point_or_area',
-	            'add_area_h',
-	            'add_area_command',
-	            'add_area_draw',
-	            'add_area_continue',
-	            'add_area_finish',
-	            'square_area_h',
-	            'square_area_command',
-	            'modify_area_h',
-	            'modify_area_dragnode',
-	            'modify_area_addnode',
-	            'delete_area_h',
-	            'delete_area',
-	            'delete_area_command'
-	        ]],
-	        ['relations', [
-	            'intro',
-	            'edit_relation_h',
-	            'edit_relation',
-	            'edit_relation_add',
-	            'edit_relation_delete',
-	            'maintain_relation_h',
-	            'maintain_relation',
-	            'relation_types_h',
-	            'multipolygon_h',
-	            'multipolygon',
-	            'multipolygon_create',
-	            'multipolygon_merge',
-	            'turn_restriction_h',
-	            'turn_restriction',
-	            'turn_restriction_field',
-	            'turn_restriction_editing',
-	            'route_h',
-	            'route',
-	            'route_add',
-	            'boundary_h',
-	            'boundary',
-	            'boundary_add'
-	        ]],
-	        ['notes', [
-	            'intro',
-	            'add_note_h',
-	            'add_note',
-	            'place_note',
-	            'move_note',
-	            'update_note_h',
-	            'update_note',
-	            'save_note_h',
-	            'save_note'
-	        ]],
-	        ['imagery', [
-	            'intro',
-	            'sources_h',
-	            'choosing',
-	            'sources',
-	            'offsets_h',
-	            'offset',
-	            'offset_change'
-	        ]],
-	        ['streetlevel', [
-	            'intro',
-	            'using_h',
-	            'using',
-	            'photos',
-	            'viewer'
-	        ]],
-	        ['gps', [
-	            'intro',
-	            'survey',
-	            'using_h',
-	            'using',
-	            'tracing',
-	            'upload'
-	        ]],
-	        ['qa', [
-	            'intro',
-	            'tools_h',
-	            'tools',
-	            'issues_h',
-	            'issues'
-	        ]]
-	    ];
+	    if (layer) {
+	      for (var i = 0; i < layer.length; i++) {
+	        var feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+	        var geometry = feature.geometry; // Treat all Polygons as MultiPolygons
 
-	    var headings = {
-	        'help.help.open_data_h': 3,
-	        'help.help.before_start_h': 3,
-	        'help.help.open_source_h': 3,
-	        'help.overview.navigation_h': 3,
-	        'help.overview.features_h': 3,
-	        'help.editing.select_h': 3,
-	        'help.editing.multiselect_h': 3,
-	        'help.editing.undo_redo_h': 3,
-	        'help.editing.save_h': 3,
-	        'help.editing.upload_h': 3,
-	        'help.editing.backups_h': 3,
-	        'help.editing.keyboard_h': 3,
-	        'help.feature_editor.type_h': 3,
-	        'help.feature_editor.fields_h': 3,
-	        'help.feature_editor.tags_h': 3,
-	        'help.points.add_point_h': 3,
-	        'help.points.move_point_h': 3,
-	        'help.points.delete_point_h': 3,
-	        'help.lines.add_line_h': 3,
-	        'help.lines.modify_line_h': 3,
-	        'help.lines.connect_line_h': 3,
-	        'help.lines.disconnect_line_h': 3,
-	        'help.lines.move_line_h': 3,
-	        'help.lines.delete_line_h': 3,
-	        'help.areas.point_or_area_h': 3,
-	        'help.areas.add_area_h': 3,
-	        'help.areas.square_area_h': 3,
-	        'help.areas.modify_area_h': 3,
-	        'help.areas.delete_area_h': 3,
-	        'help.relations.edit_relation_h': 3,
-	        'help.relations.maintain_relation_h': 3,
-	        'help.relations.relation_types_h': 2,
-	        'help.relations.multipolygon_h': 3,
-	        'help.relations.turn_restriction_h': 3,
-	        'help.relations.route_h': 3,
-	        'help.relations.boundary_h': 3,
-	        'help.notes.add_note_h': 3,
-	        'help.notes.update_note_h': 3,
-	        'help.notes.save_note_h': 3,
-	        'help.imagery.sources_h': 3,
-	        'help.imagery.offsets_h': 3,
-	        'help.streetlevel.using_h': 3,
-	        'help.gps.using_h': 3,
-	        'help.qa.tools_h': 3,
-	        'help.qa.issues_h': 3
-	    };
+	        if (geometry.type === 'Polygon') {
+	          geometry.type = 'MultiPolygon';
+	          geometry.coordinates = [geometry.coordinates];
+	        }
 
-	    // For each section, squash all the texts into a single markdown document
-	    var docs = docKeys.map(function(key) {
-	        var helpkey = 'help.' + key[0];
-	        var helpPaneReplacements = { version: context.version };
-	        var text = key[1].reduce(function(all, part) {
-	            var subkey = helpkey + '.' + part;
-	            var depth = headings[subkey];                              // is this subkey a heading?
-	            var hhh = depth ? Array(depth + 1).join('#') + ' ' : '';   // if so, prepend with some ##'s
-	            return all + hhh + helpString(subkey, helpPaneReplacements) + '\n\n';
-	        }, '');
+	        var isClipped = false; // Clip to tile bounds
 
-	        return {
-	            title: _t(helpkey + '.title'),
-	            html: marked_1(text.trim())
-	                // use keyboard key styling for shortcuts
-	                .replace(/<code>/g, '<kbd>')
-	                .replace(/<\/code>/g, '<\/kbd>')
-	        };
-	    });
+	        if (geometry.type === 'MultiPolygon') {
+	          var featureClip = bboxClip(feature, tile.extent.rectangle());
 
-	    var helpPane = uiPane('help', context)
-	        .key(_t('help.key'))
-	        .title(_t('help.title'))
-	        .description(_t('help.title'))
-	        .iconName('iD-icon-help');
+	          if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
+	            // feature = featureClip;
+	            isClipped = true;
+	          }
 
-	    helpPane.renderContent = function(content) {
+	          if (!feature.geometry.coordinates.length) continue; // not actually on this tile
 
-	        function clickHelp(d, i) {
-	            var rtl = (_mainLocalizer.textDirection() === 'rtl');
-	            content.property('scrollTop', 0);
-	            helpPane.selection().select('.pane-heading h2').html(d.title);
+	          if (!feature.geometry.coordinates[0].length) continue; // not actually on this tile
+	        } // Generate some unique IDs and add some metadata
 
-	            body.html(d.html);
-	            body.selectAll('a')
-	                .attr('target', '_blank');
-	            menuItems.classed('selected', function(m) {
-	                return m.title === d.title;
-	            });
 
-	            nav.html('');
-	            if (rtl) {
-	                nav.call(drawNext).call(drawPrevious);
-	            } else {
-	                nav.call(drawPrevious).call(drawNext);
-	            }
+	        var featurehash = utilHashcode(fastJsonStableStringify(feature));
+	        var propertyhash = utilHashcode(fastJsonStableStringify(feature.properties || {}));
+	        feature.__layerID__ = layerID.replace(/[^_a-zA-Z0-9\-]/g, '_');
+	        feature.__featurehash__ = featurehash;
+	        feature.__propertyhash__ = propertyhash;
+	        features.push(feature); // Clipped Polygons at same zoom with identical properties can get merged
 
+	        if (isClipped && geometry.type === 'MultiPolygon') {
+	          var merged = mergeCache[propertyhash];
 
-	            function drawNext(selection) {
-	                if (i < docs.length - 1) {
-	                    var nextLink = selection
-	                        .append('a')
-	                        .attr('class', 'next')
-	                        .on('click', function() {
-	                            clickHelp(docs[i + 1], i + 1);
-	                        });
+	          if (merged && merged.length) {
+	            var other = merged[0];
+	            var coords = index.union(feature.geometry.coordinates, other.geometry.coordinates);
 
-	                    nextLink
-	                        .append('span')
-	                        .text(docs[i + 1].title)
-	                        .call(svgIcon((rtl ? '#iD-icon-backward' : '#iD-icon-forward'), 'inline'));
-	                }
+	            if (!coords || !coords.length) {
+	              continue; // something failed in polygon union
 	            }
 
+	            merged.push(feature);
 
-	            function drawPrevious(selection) {
-	                if (i > 0) {
-	                    var prevLink = selection
-	                        .append('a')
-	                        .attr('class', 'previous')
-	                        .on('click', function() {
-	                            clickHelp(docs[i - 1], i - 1);
-	                        });
+	            for (var j = 0; j < merged.length; j++) {
+	              // all these features get...
+	              merged[j].geometry.coordinates = coords; // same coords
 
-	                    prevLink
-	                        .call(svgIcon((rtl ? '#iD-icon-forward' : '#iD-icon-backward'), 'inline'))
-	                        .append('span')
-	                        .text(docs[i - 1].title);
-	                }
+	              merged[j].__featurehash__ = featurehash; // same hash, so deduplication works
 	            }
+	          } else {
+	            mergeCache[propertyhash] = [feature];
+	          }
 	        }
+	      }
+	    }
+	  });
+	  return features;
+	}
 
+	function loadTile(source, tile) {
+	  if (source.loaded[tile.id] || source.inflight[tile.id]) return;
+	  var url = source.template.replace('{x}', tile.xyz[0]).replace('{y}', tile.xyz[1]) // TMS-flipped y coordinate
+	  .replace(/\{[t-]y\}/, Math.pow(2, tile.xyz[2]) - tile.xyz[1] - 1).replace(/\{z(oom)?\}/, tile.xyz[2]).replace(/\{switch:([^}]+)\}/, function (s, r) {
+	    var subdomains = r.split(',');
+	    return subdomains[(tile.xyz[0] + tile.xyz[1]) % subdomains.length];
+	  });
+	  var controller = new AbortController();
+	  source.inflight[tile.id] = controller;
+	  fetch(url, {
+	    signal: controller.signal
+	  }).then(function (response) {
+	    if (!response.ok) {
+	      throw new Error(response.status + ' ' + response.statusText);
+	    }
 
-	        function clickWalkthrough() {
-	            if (context.inIntro()) { return; }
-	            context.container().call(uiIntro(context));
-	            context.ui().togglePanes();
-	        }
+	    source.loaded[tile.id] = [];
+	    delete source.inflight[tile.id];
+	    return response.arrayBuffer();
+	  }).then(function (data) {
+	    if (!data) {
+	      throw new Error('No Data');
+	    }
 
+	    var z = tile.xyz[2];
 
-	        function clickShortcuts() {
-	            context.container().call(uiShortcuts(context), true);
-	        }
+	    if (!source.canMerge[z]) {
+	      source.canMerge[z] = {}; // initialize mergeCache
+	    }
 
-	        var toc = content
-	            .append('ul')
-	            .attr('class', 'toc');
+	    source.loaded[tile.id] = vtToGeoJSON(data, tile, source.canMerge[z]);
+	    dispatch.call('loadedData');
+	  })["catch"](function () {
+	    source.loaded[tile.id] = [];
+	    delete source.inflight[tile.id];
+	  });
+	}
 
-	        var menuItems = toc.selectAll('li')
-	            .data(docs)
-	            .enter()
-	            .append('li')
-	            .append('a')
-	            .html(function(d) { return d.title; })
-	            .on('click', clickHelp);
-
-	        var shortcuts = toc
-	            .append('li')
-	            .attr('class', 'shortcuts')
-	            .call(uiTooltip()
-	                .title(_t('shortcuts.tooltip'))
-	                .keys(['?'])
-	                .placement('top')
-	            )
-	            .append('a')
-	            .on('click', clickShortcuts);
+	var serviceVectorTile = {
+	  init: function init() {
+	    if (!_vtCache) {
+	      this.reset();
+	    }
 
-	        shortcuts
-	            .append('div')
-	            .text(_t('shortcuts.title'));
+	    this.event = utilRebind(this, dispatch, 'on');
+	  },
+	  reset: function reset() {
+	    for (var sourceID in _vtCache) {
+	      var source = _vtCache[sourceID];
 
-	        var walkthrough = toc
-	            .append('li')
-	            .attr('class', 'walkthrough')
-	            .append('a')
-	            .on('click', clickWalkthrough);
+	      if (source && source.inflight) {
+	        Object.values(source.inflight).forEach(abortRequest);
+	      }
+	    }
 
-	        walkthrough
-	            .append('svg')
-	            .attr('class', 'logo logo-walkthrough')
-	            .append('use')
-	            .attr('xlink:href', '#iD-logo-walkthrough');
+	    _vtCache = {};
+	  },
+	  addSource: function addSource(sourceID, template) {
+	    _vtCache[sourceID] = {
+	      template: template,
+	      inflight: {},
+	      loaded: {},
+	      canMerge: {}
+	    };
+	    return _vtCache[sourceID];
+	  },
+	  data: function data(sourceID, projection) {
+	    var source = _vtCache[sourceID];
+	    if (!source) return [];
+	    var tiles = tiler.getTiles(projection);
+	    var seen = {};
+	    var results = [];
 
-	        walkthrough
-	            .append('div')
-	            .text(_t('splash.walkthrough'));
+	    for (var i = 0; i < tiles.length; i++) {
+	      var features = source.loaded[tiles[i].id];
+	      if (!features || !features.length) continue;
 
+	      for (var j = 0; j < features.length; j++) {
+	        var feature = features[j];
+	        var hash = feature.__featurehash__;
+	        if (seen[hash]) continue;
+	        seen[hash] = true; // return a shallow copy, because the hash may change
+	        // later if this feature gets merged with another
 
-	        var helpContent = content
-	            .append('div')
-	            .attr('class', 'left-content');
+	        results.push(Object.assign({}, feature)); // shallow copy
+	      }
+	    }
 
-	        var body = helpContent
-	            .append('div')
-	            .attr('class', 'body');
+	    return results;
+	  },
+	  loadTiles: function loadTiles(sourceID, template, projection) {
+	    var source = _vtCache[sourceID];
 
-	        var nav = helpContent
-	            .append('div')
-	            .attr('class', 'nav');
+	    if (!source) {
+	      source = this.addSource(sourceID, template);
+	    }
 
-	        clickHelp(docs[0], 0);
+	    var tiles = tiler.getTiles(projection); // abort inflight requests that are no longer needed
 
-	    };
+	    Object.keys(source.inflight).forEach(function (k) {
+	      var wanted = tiles.find(function (tile) {
+	        return k === tile.id;
+	      });
 
-	    return helpPane;
-	}
+	      if (!wanted) {
+	        abortRequest(source.inflight[k]);
+	        delete source.inflight[k];
+	      }
+	    });
+	    tiles.forEach(function (tile) {
+	      loadTile(source, tile);
+	    });
+	  },
+	  cache: function cache() {
+	    return _vtCache;
+	  }
+	};
 
-	function uiSectionValidationIssues(id, severity, context) {
+	var apibase = 'https://www.wikidata.org/w/api.php?';
+	var _wikidataCache = {};
+	var serviceWikidata = {
+	  init: function init() {},
+	  reset: function reset() {
+	    _wikidataCache = {};
+	  },
+	  // Search for Wikidata items matching the query
+	  itemsForSearchQuery: function itemsForSearchQuery(query, callback) {
+	    if (!query) {
+	      if (callback) callback('No query', {});
+	      return;
+	    }
 
-	    var _issues = [];
+	    var lang = this.languagesToQuery()[0];
+	    var url = apibase + utilQsString({
+	      action: 'wbsearchentities',
+	      format: 'json',
+	      formatversion: 2,
+	      search: query,
+	      type: 'item',
+	      // the language to search
+	      language: lang,
+	      // the language for the label and description in the result
+	      uselang: lang,
+	      limit: 10,
+	      origin: '*'
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
-	    var section = uiSection(id, context)
-	        .title(function() {
-	            if (!_issues) { return ''; }
-	            var issueCountText = _issues.length > 1000 ? '1000+' : String(_issues.length);
-	            return _t('issues.' + severity + 's.list_title', { count: issueCountText });
-	        })
-	        .disclosureContent(renderDisclosureContent)
-	        .shouldDisplay(function() {
-	            return _issues && _issues.length;
-	        });
+	      if (callback) callback(null, result.search || {});
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message, {});
+	    });
+	  },
+	  // Given a Wikipedia language and article title,
+	  // return an array of corresponding Wikidata entities.
+	  itemsByTitle: function itemsByTitle(lang, title, callback) {
+	    if (!title) {
+	      if (callback) callback('No title', {});
+	      return;
+	    }
 
-	    function getOptions() {
-	        return {
-	            what: corePreferences('validate-what') || 'edited',
-	            where: corePreferences('validate-where') || 'all'
-	        };
+	    lang = lang || 'en';
+	    var url = apibase + utilQsString({
+	      action: 'wbgetentities',
+	      format: 'json',
+	      formatversion: 2,
+	      sites: lang.replace(/-/g, '_') + 'wiki',
+	      titles: title,
+	      languages: 'en',
+	      // shrink response by filtering to one language
+	      origin: '*'
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
+
+	      if (callback) callback(null, result.entities || {});
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message, {});
+	    });
+	  },
+	  languagesToQuery: function languagesToQuery() {
+	    return _mainLocalizer.localeCodes().map(function (code) {
+	      return code.toLowerCase();
+	    }).filter(function (code) {
+	      // HACK: en-us isn't a wikidata language. We should really be filtering by
+	      // the languages known to be supported by wikidata.
+	      return code !== 'en-us';
+	    });
+	  },
+	  entityByQID: function entityByQID(qid, callback) {
+	    if (!qid) {
+	      callback('No qid', {});
+	      return;
 	    }
 
-	    // get and cache the issues to display, unordered
-	    function reloadIssues() {
-	        _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
+	    if (_wikidataCache[qid]) {
+	      if (callback) callback(null, _wikidataCache[qid]);
+	      return;
 	    }
 
-	    function renderDisclosureContent(selection) {
+	    var langs = this.languagesToQuery();
+	    var url = apibase + utilQsString({
+	      action: 'wbgetentities',
+	      format: 'json',
+	      formatversion: 2,
+	      ids: qid,
+	      props: 'labels|descriptions|claims|sitelinks',
+	      sitefilter: langs.map(function (d) {
+	        return d + 'wiki';
+	      }).join('|'),
+	      languages: langs.join('|'),
+	      languagefallback: 1,
+	      origin: '*'
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
-	        var center = context.map().center();
-	        var graph = context.graph();
+	      if (callback) callback(null, result.entities[qid] || {});
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message, {});
+	    });
+	  },
+	  // Pass `params` object of the form:
+	  // {
+	  //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
+	  // }
+	  //
+	  // Get an result object used to display tag documentation
+	  // {
+	  //   title:        'string',
+	  //   description:  'string',
+	  //   editURL:      'string',
+	  //   imageURL:     'string',
+	  //   wiki:         { title: 'string', text: 'string', url: 'string' }
+	  // }
+	  //
+	  getDocs: function getDocs(params, callback) {
+	    var langs = this.languagesToQuery();
+	    this.entityByQID(params.qid, function (err, entity) {
+	      if (err || !entity) {
+	        callback(err || 'No entity');
+	        return;
+	      }
 
-	        // sort issues by distance away from the center of the map
-	        var issues = _issues.map(function withDistance(issue) {
-	                var extent = issue.extent(graph);
-	                var dist = extent ? geoSphericalDistance(center, extent.center()) : 0;
-	                return Object.assign(issue, { dist: dist });
-	            })
-	            .sort(function byDistance(a, b) {
-	                return a.dist - b.dist;
-	            });
+	      var i;
+	      var description;
 
-	        // cut off at 1000
-	        issues = issues.slice(0, 1000);
+	      for (i in langs) {
+	        var code = langs[i];
 
-	        //renderIgnoredIssuesReset(_warningsSelection);
+	        if (entity.descriptions[code] && entity.descriptions[code].language === code) {
+	          description = entity.descriptions[code];
+	          break;
+	        }
+	      }
 
-	        selection
-	            .call(drawIssuesList, issues);
-	    }
+	      if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
 
-	    function drawIssuesList(selection, issues) {
-	        var list = selection.selectAll('.issues-list')
-	            .data([0]);
+	      var result = {
+	        title: entity.id,
+	        description: description ? description.value : '',
+	        descriptionLocaleCode: description ? description.language : '',
+	        editURL: 'https://www.wikidata.org/wiki/' + entity.id
+	      }; // add image
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list issues-list ' + severity + 's-list')
-	            .merge(list);
+	      if (entity.claims) {
+	        var imageroot = 'https://commons.wikimedia.org/w/index.php';
+	        var props = ['P154', 'P18']; // logo image, image
 
+	        var prop, image;
 
-	        var items = list.selectAll('li')
-	            .data(issues, function(d) { return d.id; });
+	        for (i = 0; i < props.length; i++) {
+	          prop = entity.claims[props[i]];
 
-	        // Exit
-	        items.exit()
-	            .remove();
+	          if (prop && Object.keys(prop).length > 0) {
+	            image = prop[Object.keys(prop)[0]].mainsnak.datavalue.value;
 
-	        // Enter
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', function (d) { return 'issue severity-' + d.severity; })
-	            .on('click', function(d) {
-	                context.validator().focusIssue(d);
-	            })
-	            .on('mouseover', function(d) {
-	                utilHighlightEntities(d.entityIds, true, context);
-	            })
-	            .on('mouseout', function(d) {
-	                utilHighlightEntities(d.entityIds, false, context);
-	            });
+	            if (image) {
+	              result.imageURL = imageroot + '?' + utilQsString({
+	                title: 'Special:Redirect/file/' + image,
+	                width: 400
+	              });
+	              break;
+	            }
+	          }
+	        }
+	      }
 
+	      if (entity.sitelinks) {
+	        var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en'; // must be one of these that we requested..
 
-	        var labelsEnter = itemsEnter
-	            .append('div')
-	            .attr('class', 'issue-label');
-
-	        var textEnter = labelsEnter
-	            .append('span')
-	            .attr('class', 'issue-text');
-
-	        textEnter
-	            .append('span')
-	            .attr('class', 'issue-icon')
-	            .each(function(d) {
-	                var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
-	                select(this)
-	                    .call(svgIcon(iconName));
-	            });
+	        for (i = 0; i < langs.length; i++) {
+	          // check each, in order of preference
+	          var w = langs[i] + 'wiki';
 
-	        textEnter
-	            .append('span')
-	            .attr('class', 'issue-message');
+	          if (entity.sitelinks[w]) {
+	            var title = entity.sitelinks[w].title;
+	            var tKey = 'inspector.wiki_reference';
 
-	        /*
-	        labelsEnter
-	            .append('span')
-	            .attr('class', 'issue-autofix')
-	            .each(function(d) {
-	                if (!d.autoFix) return;
-
-	                d3_select(this)
-	                    .append('button')
-	                    .attr('title', t('issues.fix_one.title'))
-	                    .datum(d.autoFix)  // set button datum to the autofix
-	                    .attr('class', 'autofix action')
-	                    .on('click', function(d) {
-	                        d3_event.preventDefault();
-	                        d3_event.stopPropagation();
-
-	                        var issuesEntityIDs = d.issue.entityIds;
-	                        utilHighlightEntities(issuesEntityIDs.concat(d.entityIds), false, context);
-
-	                        context.perform.apply(context, d.autoArgs);
-	                        context.validator().validate();
-	                    })
-	                    .call(svgIcon('#iD-icon-wrench'));
-	            });
-	        */
+	            if (!englishLocale && langs[i] === 'en') {
+	              // user's locale isn't English but
+	              tKey = 'inspector.wiki_en_reference'; // we are sending them to enwiki anyway..
+	            }
 
-	        // Update
-	        items = items
-	            .merge(itemsEnter)
-	            .order();
+	            result.wiki = {
+	              title: title,
+	              text: tKey,
+	              url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
+	            };
+	            break;
+	          }
+	        }
+	      }
 
-	        items.selectAll('.issue-message')
-	            .text(function(d) {
-	                return d.message(context);
-	            });
+	      callback(null, result);
+	    });
+	  }
+	};
 
-	        /*
-	        // autofix
-	        var canAutoFix = issues.filter(function(issue) { return issue.autoFix; });
-
-	        var autoFixAll = selection.selectAll('.autofix-all')
-	            .data(canAutoFix.length ? [0] : []);
-
-	        // exit
-	        autoFixAll.exit()
-	            .remove();
-
-	        // enter
-	        var autoFixAllEnter = autoFixAll.enter()
-	            .insert('div', '.issues-list')
-	            .attr('class', 'autofix-all');
-
-	        var linkEnter = autoFixAllEnter
-	            .append('a')
-	            .attr('class', 'autofix-all-link')
-	            .attr('href', '#');
-
-	        linkEnter
-	            .append('span')
-	            .attr('class', 'autofix-all-link-text')
-	            .text(t('issues.fix_all.title'));
-
-	        linkEnter
-	            .append('span')
-	            .attr('class', 'autofix-all-link-icon')
-	            .call(svgIcon('#iD-icon-wrench'));
-
-	        if (severity === 'warning') {
-	            renderIgnoredIssuesReset(selection);
-	        }
-
-	        // update
-	        autoFixAll = autoFixAll
-	            .merge(autoFixAllEnter);
-
-	        autoFixAll.selectAll('.autofix-all-link')
-	            .on('click', function() {
-	                context.pauseChangeDispatch();
-	                context.perform(actionNoop());
-	                canAutoFix.forEach(function(issue) {
-	                    var args = issue.autoFix.autoArgs.slice();  // copy
-	                    if (typeof args[args.length - 1] !== 'function') {
-	                        args.pop();
-	                    }
-	                    args.push(t('issues.fix_all.annotation'));
-	                    context.replace.apply(context, args);
-	                });
-	                context.resumeChangeDispatch();
-	                context.validator().validate();
-	            });
-	        */
+	var endpoint = 'https://en.wikipedia.org/w/api.php?';
+	var serviceWikipedia = {
+	  init: function init() {},
+	  reset: function reset() {},
+	  search: function search(lang, query, callback) {
+	    if (!query) {
+	      if (callback) callback('No Query', []);
+	      return;
 	    }
 
-	    context.validator().on('validated.uiSectionValidationIssues' + id, function() {
-	        window.requestIdleCallback(function() {
-	            reloadIssues();
-	            section.reRender();
+	    lang = lang || 'en';
+	    var url = endpoint.replace('en', lang) + utilQsString({
+	      action: 'query',
+	      list: 'search',
+	      srlimit: '10',
+	      srinfo: 'suggestion',
+	      format: 'json',
+	      origin: '*',
+	      srsearch: query
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      } else if (!result || !result.query || !result.query.search) {
+	        throw new Error('No Results');
+	      }
+
+	      if (callback) {
+	        var titles = result.query.search.map(function (d) {
+	          return d.title;
 	        });
+	        callback(null, titles);
+	      }
+	    })["catch"](function (err) {
+	      if (callback) callback(err, []);
 	    });
+	  },
+	  suggestions: function suggestions(lang, query, callback) {
+	    if (!query) {
+	      if (callback) callback('', []);
+	      return;
+	    }
 
-	    context.map().on('move.uiSectionValidationIssues' + id,
-	        debounce(function() {
-	            window.requestIdleCallback(function() {
-	                if (getOptions().where === 'visible') {
-	                    // must refetch issues if they are viewport-dependent
-	                    reloadIssues();
-	                }
-	                // always reload list to re-sort-by-distance
-	                section.reRender();
-	            });
-	        }, 1000)
-	    );
+	    lang = lang || 'en';
+	    var url = endpoint.replace('en', lang) + utilQsString({
+	      action: 'opensearch',
+	      namespace: 0,
+	      suggest: '',
+	      format: 'json',
+	      origin: '*',
+	      search: query
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      } else if (!result || result.length < 2) {
+	        throw new Error('No Results');
+	      }
 
-	    return section;
-	}
+	      if (callback) callback(null, result[1] || []);
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message, []);
+	    });
+	  },
+	  translations: function translations(lang, title, callback) {
+	    if (!title) {
+	      if (callback) callback('No Title');
+	      return;
+	    }
 
-	function uiSectionValidationOptions(context) {
+	    var url = endpoint.replace('en', lang) + utilQsString({
+	      action: 'query',
+	      prop: 'langlinks',
+	      format: 'json',
+	      origin: '*',
+	      lllimit: 500,
+	      titles: title
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      } else if (!result || !result.query || !result.query.pages) {
+	        throw new Error('No Results');
+	      }
 
-	    var section = uiSection('issues-options', context)
-	        .content(renderContent);
+	      if (callback) {
+	        var list = result.query.pages[Object.keys(result.query.pages)[0]];
+	        var translations = {};
 
-	    function renderContent(selection) {
+	        if (list && list.langlinks) {
+	          list.langlinks.forEach(function (d) {
+	            translations[d.lang] = d['*'];
+	          });
+	        }
 
-	        var container = selection.selectAll('.issues-options-container')
-	            .data([0]);
+	        callback(null, translations);
+	      }
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message);
+	    });
+	  }
+	};
 
-	        container = container.enter()
-	            .append('div')
-	            .attr('class', 'issues-options-container')
-	            .merge(container);
+	var services = {
+	  geocoder: serviceNominatim,
+	  keepRight: serviceKeepRight,
+	  improveOSM: serviceImproveOSM,
+	  osmose: serviceOsmose,
+	  mapillary: serviceMapillary,
+	  nsi: serviceNsi,
+	  kartaview: serviceKartaview,
+	  osm: serviceOsm,
+	  osmWikibase: serviceOsmWikibase,
+	  maprules: serviceMapRules,
+	  streetside: serviceStreetside,
+	  taginfo: serviceTaginfo,
+	  vectorTile: serviceVectorTile,
+	  wikidata: serviceWikidata,
+	  wikipedia: serviceWikipedia
+	};
 
-	        var data = [
-	            { key: 'what', values: ['edited', 'all'] },
-	            { key: 'where', values: ['visible', 'all'] }
-	        ];
+	function modeDragNote(context) {
+	  var mode = {
+	    id: 'drag-note',
+	    button: 'browse'
+	  };
+	  var edit = behaviorEdit(context);
 
-	        var options = container.selectAll('.issues-option')
-	            .data(data, function(d) { return d.key; });
+	  var _nudgeInterval;
 
-	        var optionsEnter = options.enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'issues-option issues-option-' + d.key; });
+	  var _lastLoc;
 
-	        optionsEnter
-	            .append('div')
-	            .attr('class', 'issues-option-title')
-	            .text(function(d) { return _t('issues.options.' + d.key + '.title'); });
+	  var _note; // most current note.. dragged note may have stale datum.
 
-	        var valuesEnter = optionsEnter.selectAll('label')
-	            .data(function(d) {
-	                return d.values.map(function(val) { return { value: val, key: d.key }; });
-	            })
-	            .enter()
-	            .append('label');
 
-	        valuesEnter
-	            .append('input')
-	            .attr('type', 'radio')
-	            .attr('name', function(d) { return 'issues-option-' + d.key; })
-	            .attr('value', function(d) { return d.value; })
-	            .property('checked', function(d) { return getOptions()[d.key] === d.value; })
-	            .on('change', function(d) { updateOptionValue(d.key, d.value); });
+	  function startNudge(d3_event, nudge) {
+	    if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+	    _nudgeInterval = window.setInterval(function () {
+	      context.map().pan(nudge);
+	      doMove(d3_event, nudge);
+	    }, 50);
+	  }
 
-	        valuesEnter
-	            .append('span')
-	            .text(function(d) { return _t('issues.options.' + d.key + '.' + d.value); });
+	  function stopNudge() {
+	    if (_nudgeInterval) {
+	      window.clearInterval(_nudgeInterval);
+	      _nudgeInterval = null;
 	    }
+	  }
 
-	    function getOptions() {
-	        return {
-	            what: corePreferences('validate-what') || 'edited',  // 'all', 'edited'
-	            where: corePreferences('validate-where') || 'all'    // 'all', 'visible'
-	        };
-	    }
+	  function origin(note) {
+	    return context.projection(note.loc);
+	  }
 
-	    function updateOptionValue(d, val) {
-	        if (!val && event && event.target) {
-	            val = event.target.value;
-	        }
+	  function start(d3_event, note) {
+	    _note = note;
+	    var osm = services.osm;
 
-	        corePreferences('validate-' + d, val);
-	        context.validator().validate();
+	    if (osm) {
+	      // Get latest note from cache.. The marker may have a stale datum bound to it
+	      // and dragging it around can sometimes delete the users note comment.
+	      _note = osm.getNote(_note.id);
 	    }
 
-	    return section;
-	}
+	    context.surface().selectAll('.note-' + _note.id).classed('active', true);
+	    context.perform(actionNoop());
+	    context.enter(mode);
+	    context.selectedNoteID(_note.id);
+	  }
 
-	function uiSectionValidationRules(context) {
+	  function move(d3_event, entity, point) {
+	    d3_event.stopPropagation();
+	    _lastLoc = context.projection.invert(point);
+	    doMove(d3_event);
+	    var nudge = geoViewportEdge(point, context.map().dimensions());
 
-	    var MINSQUARE = 0;
-	    var MAXSQUARE = 20;
-	    var DEFAULTSQUARE = 5;  // see also unsquare_way.js
+	    if (nudge) {
+	      startNudge(d3_event, nudge);
+	    } else {
+	      stopNudge();
+	    }
+	  }
 
-	    var section = uiSection('issues-rules', context)
-	        .disclosureContent(renderDisclosureContent)
-	        .title(_t('issues.rules.title'));
+	  function doMove(d3_event, nudge) {
+	    nudge = nudge || [0, 0];
+	    var currPoint = d3_event && d3_event.point || context.projection(_lastLoc);
+	    var currMouse = geoVecSubtract(currPoint, nudge);
+	    var loc = context.projection.invert(currMouse);
+	    _note = _note.move(loc);
+	    var osm = services.osm;
 
-	    var _ruleKeys = context.validator().getRuleKeys()
-	        .filter(function(key) { return key !== 'maprules'; })
-	        .sort(function(key1, key2) {
-	            // alphabetize by localized title
-	            return _t('issues.' + key1 + '.title') < _t('issues.' + key2 + '.title') ? -1 : 1;
-	        });
+	    if (osm) {
+	      osm.replaceNote(_note); // update note cache
+	    }
 
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.issues-rulelist-container')
-	            .data([0]);
+	    context.replace(actionNoop()); // trigger redraw
+	  }
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'issues-rulelist-container');
+	  function end() {
+	    context.replace(actionNoop()); // trigger redraw
 
-	        containerEnter
-	            .append('ul')
-	            .attr('class', 'layer-list issue-rules-list');
+	    context.selectedNoteID(_note.id).enter(modeSelectNote(context, _note.id));
+	  }
 
-	        var ruleLinks = containerEnter
-	            .append('div')
-	            .attr('class', 'issue-rules-links section-footer');
-
-	        ruleLinks
-	            .append('a')
-	            .attr('class', 'issue-rules-link')
-	            .attr('href', '#')
-	            .text(_t('issues.enable_all'))
-	            .on('click', function() {
-	                context.validator().disableRules([]);
-	            });
+	  var drag = behaviorDrag().selector('.layer-touch.markers .target.note.new').surface(context.container().select('.main-map').node()).origin(origin).on('start', start).on('move', move).on('end', end);
 
-	        ruleLinks
-	            .append('a')
-	            .attr('class', 'issue-rules-link')
-	            .attr('href', '#')
-	            .text(_t('issues.disable_all'))
-	            .on('click', function() {
-	                context.validator().disableRules(_ruleKeys);
-	            });
+	  mode.enter = function () {
+	    context.install(edit);
+	  };
 
+	  mode.exit = function () {
+	    context.ui().sidebar.hover.cancel();
+	    context.uninstall(edit);
+	    context.surface().selectAll('.active').classed('active', false);
+	    stopNudge();
+	  };
 
-	        // Update
-	        container = container
-	            .merge(containerEnter);
+	  mode.behavior = drag;
+	  return mode;
+	}
 
-	        container.selectAll('.issue-rules-list')
-	            .call(drawListItems, _ruleKeys, 'checkbox', 'rule', toggleRule, isRuleEnabled);
-	    }
+	function modeSelectData(context, selectedDatum) {
+	  var mode = {
+	    id: 'select-data',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('select-data');
+	  var dataEditor = uiDataEditor(context);
+	  var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior]; // class the data as selected, or return to browse mode if the data is gone
 
-	    function drawListItems(selection, data, type, name, change, active) {
-	        var items = selection.selectAll('li')
-	            .data(data);
+	  function selectData(d3_event, drawn) {
+	    var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);
 
-	        // Exit
-	        items.exit()
-	            .remove();
+	    if (selection.empty()) {
+	      // Return to browse mode if selected DOM elements have
+	      // disappeared because the user moved them out of view..
+	      var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;
 
-	        // Enter
-	        var enter = items.enter()
-	            .append('li');
+	      if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+	        context.enter(modeBrowse(context));
+	      }
+	    } else {
+	      selection.classed('selected', true);
+	    }
+	  }
 
-	        if (name === 'rule') {
-	            enter
-	                .call(uiTooltip()
-	                    .title(function(d) { return _t('issues.' + d + '.tip'); })
-	                    .placement('top')
-	                );
-	        }
+	  function esc() {
+	    if (context.container().select('.combobox').size()) return;
+	    context.enter(modeBrowse(context));
+	  }
 
-	        var label = enter
-	            .append('label');
+	  mode.zoomToSelected = function () {
+	    var extent = geoExtent(d3_geoBounds(selectedDatum));
+	    context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
+	  };
 
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', name)
-	            .on('change', change);
+	  mode.enter = function () {
+	    behaviors.forEach(context.install);
+	    keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
+	    select(document).call(keybinding);
+	    selectData();
+	    var sidebar = context.ui().sidebar;
+	    sidebar.show(dataEditor.datum(selectedDatum)); // expand the sidebar, avoid obscuring the data if needed
 
-	        label
-	            .append('span')
-	            .html(function(d) {
-	                var params = {};
-	                if (d === 'unsquare_way') {
-	                    params.val = '<span class="square-degrees"></span>';
-	                }
-	                return _t('issues.' + d + '.title', params);
-	            });
+	    var extent = geoExtent(d3_geoBounds(selectedDatum));
+	    sidebar.expand(sidebar.intersects(extent));
+	    context.map().on('drawn.select-data', selectData);
+	  };
+
+	  mode.exit = function () {
+	    behaviors.forEach(context.uninstall);
+	    select(document).call(keybinding.unbind);
+	    context.surface().selectAll('.layer-mapdata .selected').classed('selected hover', false);
+	    context.map().on('drawn.select-data', null);
+	    context.ui().sidebar.hide();
+	  };
 
-	        // Update
-	        items = items
-	            .merge(enter);
-
-	        items
-	            .classed('active', active)
-	            .selectAll('input')
-	            .property('checked', active)
-	            .property('indeterminate', false);
-
-
-	        // user-configurable square threshold
-	        var degStr = corePreferences('validate-square-degrees');
-	        if (degStr === null) {
-	            degStr = '' + DEFAULTSQUARE;
-	        }
-
-	        var span = items.selectAll('.square-degrees');
-	        var input = span.selectAll('.square-degrees-input')
-	            .data([0]);
-
-	        // enter / update
-	        input.enter()
-	            .append('input')
-	            .attr('type', 'number')
-	            .attr('min', '' + MINSQUARE)
-	            .attr('max', '' + MAXSQUARE)
-	            .attr('step', '0.5')
-	            .attr('class', 'square-degrees-input')
-	            .call(utilNoAuto)
-	            .on('click', function () {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                this.select();
-	            })
-	            .on('keyup', function () {
-	                if (event.keyCode === 13) { // enter
-	                    this.blur();
-	                    this.select();
-	                }
-	            })
-	            .on('blur', changeSquare)
-	            .merge(input)
-	            .property('value', degStr);
-	    }
+	  return mode;
+	}
 
-	    function changeSquare() {
-	        var input = select(this);
-	        var degStr = utilGetSetValue(input).trim();
-	        var degNum = parseFloat(degStr, 10);
+	function behaviorSelect(context) {
+	  var _tolerancePx = 4; // see also behaviorDrag
 
-	        if (!isFinite(degNum)) {
-	            degNum = DEFAULTSQUARE;
-	        } else if (degNum > MAXSQUARE) {
-	            degNum = MAXSQUARE;
-	        } else if (degNum < MINSQUARE) {
-	            degNum = MINSQUARE;
-	        }
+	  var _lastMouseEvent = null;
+	  var _showMenu = false;
+	  var _downPointers = {};
+	  var _longPressTimeout = null;
+	  var _lastInteractionType = null; // the id of the down pointer that's enabling multiselection while down
 
-	        degNum = Math.round(degNum * 10 ) / 10;   // round to 1 decimal
-	        degStr = '' + degNum;
+	  var _multiselectionPointerId = null; // use pointer events on supported platforms; fallback to mouse events
 
-	        input
-	            .property('value', degStr);
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	        corePreferences('validate-square-degrees', degStr);
-	        context.validator().reloadUnsquareIssues();
+	  function keydown(d3_event) {
+	    if (d3_event.keyCode === 32) {
+	      // don't react to spacebar events during text input
+	      var activeNode = document.activeElement;
+	      if (activeNode && new Set(['INPUT', 'TEXTAREA']).has(activeNode.nodeName)) return;
 	    }
 
-	    function isRuleEnabled(d) {
-	        return context.validator().isRuleEnabled(d);
+	    if (d3_event.keyCode === 93 || // context menu key
+	    d3_event.keyCode === 32) {
+	      // spacebar
+	      d3_event.preventDefault();
 	    }
 
-	    function toggleRule(d) {
-	        context.validator().toggleRule(d);
-	    }
+	    if (d3_event.repeat) return; // ignore repeated events for held keys
+	    // if any key is pressed the user is probably doing something other than long-pressing
 
-	    context.validator().on('validated.uiSectionValidationRules', function() {
-	        window.requestIdleCallback(section.reRender);
-	    });
+	    cancelLongPress();
 
-	    return section;
-	}
+	    if (d3_event.shiftKey) {
+	      context.surface().classed('behavior-multiselect', true);
+	    }
 
-	function uiSectionValidationStatus(context) {
+	    if (d3_event.keyCode === 32) {
+	      // spacebar
+	      if (!_downPointers.spacebar && _lastMouseEvent) {
+	        cancelLongPress();
+	        _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
+	        _downPointers.spacebar = {
+	          firstEvent: _lastMouseEvent,
+	          lastEvent: _lastMouseEvent
+	        };
+	      }
+	    }
+	  }
 
-	    var section = uiSection('issues-status', context)
-	        .content(renderContent)
-	        .shouldDisplay(function() {
-	            var issues = context.validator().getIssues(getOptions());
-	            return issues.length === 0;
-	        });
+	  function keyup(d3_event) {
+	    cancelLongPress();
 
-	    function getOptions() {
-	        return {
-	            what: corePreferences('validate-what') || 'edited',
-	            where: corePreferences('validate-where') || 'all'
-	        };
+	    if (!d3_event.shiftKey) {
+	      context.surface().classed('behavior-multiselect', false);
 	    }
 
-	    function renderContent(selection) {
+	    if (d3_event.keyCode === 93) {
+	      // context menu key
+	      d3_event.preventDefault();
+	      _lastInteractionType = 'menukey';
+	      contextmenu(d3_event);
+	    } else if (d3_event.keyCode === 32) {
+	      // spacebar
+	      var pointer = _downPointers.spacebar;
 
-	        var box = selection.selectAll('.box')
-	            .data([0]);
+	      if (pointer) {
+	        delete _downPointers.spacebar;
+	        if (pointer.done) return;
+	        d3_event.preventDefault();
+	        _lastInteractionType = 'spacebar';
+	        click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
+	      }
+	    }
+	  }
 
-	        var boxEnter = box.enter()
-	            .append('div')
-	            .attr('class', 'box');
+	  function pointerdown(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
+	    cancelLongPress();
+	    if (d3_event.buttons && d3_event.buttons !== 1) return;
+	    context.ui().closeEditMenu();
+	    _longPressTimeout = window.setTimeout(didLongPress, 500, id, 'longdown-' + (d3_event.pointerType || 'mouse'));
+	    _downPointers[id] = {
+	      firstEvent: d3_event,
+	      lastEvent: d3_event
+	    };
+	  }
 
-	        boxEnter
-	            .append('div')
-	            .call(svgIcon('#iD-icon-apply', 'pre-text'));
+	  function didLongPress(id, interactionType) {
+	    var pointer = _downPointers[id];
+	    if (!pointer) return;
 
-	        var noIssuesMessage = boxEnter
-	            .append('span');
+	    for (var i in _downPointers) {
+	      // don't allow this or any currently down pointer to trigger another click
+	      _downPointers[i].done = true;
+	    } // treat long presses like right-clicks
 
-	        noIssuesMessage
-	            .append('strong')
-	            .attr('class', 'message');
 
-	        noIssuesMessage
-	            .append('br');
+	    _longPressTimeout = null;
+	    _lastInteractionType = interactionType;
+	    _showMenu = true;
+	    click(pointer.firstEvent, pointer.lastEvent, id);
+	  }
 
-	        noIssuesMessage
-	            .append('span')
-	            .attr('class', 'details');
+	  function pointermove(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
 
-	        renderIgnoredIssuesReset(selection);
-	        setNoIssuesText(selection);
+	    if (_downPointers[id]) {
+	      _downPointers[id].lastEvent = d3_event;
 	    }
 
-	    function renderIgnoredIssuesReset(selection) {
+	    if (!d3_event.pointerType || d3_event.pointerType === 'mouse') {
+	      _lastMouseEvent = d3_event;
 
-	        var ignoredIssues = context.validator()
-	            .getIssues({ what: 'all', where: 'all', includeDisabledRules: true, includeIgnored: 'only' });
+	      if (_downPointers.spacebar) {
+	        _downPointers.spacebar.lastEvent = d3_event;
+	      }
+	    }
+	  }
 
-	        var resetIgnored = selection.selectAll('.reset-ignored')
-	            .data(ignoredIssues.length ? [0] : []);
+	  function pointerup(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
+	    var pointer = _downPointers[id];
+	    if (!pointer) return;
+	    delete _downPointers[id];
 
-	        // exit
-	        resetIgnored.exit()
-	            .remove();
+	    if (_multiselectionPointerId === id) {
+	      _multiselectionPointerId = null;
+	    }
 
-	        // enter
-	        var resetIgnoredEnter = resetIgnored.enter()
-	            .append('div')
-	            .attr('class', 'reset-ignored section-footer');
+	    if (pointer.done) return;
+	    click(pointer.firstEvent, d3_event, id);
+	  }
 
-	        resetIgnoredEnter
-	            .append('a')
-	            .attr('href', '#');
+	  function pointercancel(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
+	    if (!_downPointers[id]) return;
+	    delete _downPointers[id];
 
-	        // update
-	        resetIgnored = resetIgnored
-	            .merge(resetIgnoredEnter);
+	    if (_multiselectionPointerId === id) {
+	      _multiselectionPointerId = null;
+	    }
+	  }
 
-	        resetIgnored.select('a')
-	            .text(_t('issues.reset_ignored', { count: ignoredIssues.length.toString() }));
+	  function contextmenu(d3_event) {
+	    d3_event.preventDefault();
 
-	        resetIgnored.on('click', function() {
-	            context.validator().resetIgnoredIssues();
-	        });
+	    if (!+d3_event.clientX && !+d3_event.clientY) {
+	      if (_lastMouseEvent) {
+	        d3_event.sourceEvent = _lastMouseEvent;
+	      } else {
+	        return;
+	      }
+	    } else {
+	      _lastMouseEvent = d3_event;
+	      _lastInteractionType = 'rightclick';
 	    }
 
-	    function setNoIssuesText(selection) {
+	    _showMenu = true;
+	    click(d3_event, d3_event);
+	  }
 
-	        var opts = getOptions();
+	  function click(firstEvent, lastEvent, pointerId) {
+	    cancelLongPress();
+	    var mapNode = context.container().select('.main-map').node(); // Use the `main-map` coordinate system since the surface and supersurface
+	    // are transformed when drag-panning.
 
-	        function checkForHiddenIssues(cases) {
-	            for (var type in cases) {
-	                var hiddenOpts = cases[type];
-	                var hiddenIssues = context.validator().getIssues(hiddenOpts);
-	                if (hiddenIssues.length) {
-	                    selection.select('.box .details')
-	                        .text(_t(
-	                            'issues.no_issues.hidden_issues.' + type,
-	                            { count: hiddenIssues.length.toString() }
-	                        ));
-	                    return;
-	                }
-	            }
-	            selection.select('.box .details')
-	                .text(_t('issues.no_issues.hidden_issues.none'));
-	        }
+	    var pointGetter = utilFastMouse(mapNode);
+	    var p1 = pointGetter(firstEvent);
+	    var p2 = pointGetter(lastEvent);
+	    var dist = geoVecLength(p1, p2);
 
-	        var messageType;
+	    if (dist > _tolerancePx || !mapContains(lastEvent)) {
+	      resetProperties();
+	      return;
+	    }
 
-	        if (opts.what === 'edited' && opts.where === 'visible') {
+	    var targetDatum = lastEvent.target.__data__;
+	    var multiselectEntityId;
 
-	            messageType = 'edits_in_view';
+	    if (!_multiselectionPointerId) {
+	      // If a different pointer than the one triggering this click is down on a
+	      // feature, treat this and all future clicks as multiselection until that
+	      // pointer is raised.
+	      var selectPointerInfo = pointerDownOnSelection(pointerId);
 
-	            checkForHiddenIssues({
-	                elsewhere: { what: 'edited', where: 'all' },
-	                everything_else: { what: 'all', where: 'visible' },
-	                disabled_rules: { what: 'edited', where: 'visible', includeDisabledRules: 'only' },
-	                everything_else_elsewhere: { what: 'all', where: 'all' },
-	                disabled_rules_elsewhere: { what: 'edited', where: 'all', includeDisabledRules: 'only' },
-	                ignored_issues: { what: 'edited', where: 'visible', includeIgnored: 'only' },
-	                ignored_issues_elsewhere: { what: 'edited', where: 'all', includeIgnored: 'only' }
-	            });
+	      if (selectPointerInfo) {
+	        _multiselectionPointerId = selectPointerInfo.pointerId; // if the other feature isn't selected yet, make sure we select it
 
-	        } else if (opts.what === 'edited' && opts.where === 'all') {
+	        multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
+	        _downPointers[selectPointerInfo.pointerId].done = true;
+	      }
+	    } // support multiselect if data is already selected
 
-	            messageType = 'edits';
 
-	            checkForHiddenIssues({
-	                everything_else: { what: 'all', where: 'all' },
-	                disabled_rules: { what: 'edited', where: 'all', includeDisabledRules: 'only' },
-	                ignored_issues: { what: 'edited', where: 'all', includeIgnored: 'only' }
-	            });
+	    var isMultiselect = context.mode().id === 'select' && ( // and shift key is down
+	    lastEvent && lastEvent.shiftKey || // or we're lasso-selecting
+	    context.surface().select('.lasso').node() || // or a pointer is down over a selected feature
+	    _multiselectionPointerId && !multiselectEntityId);
 
-	        } else if (opts.what === 'all' && opts.where === 'visible') {
+	    processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
 
-	            messageType = 'everything_in_view';
+	    function mapContains(event) {
+	      var rect = mapNode.getBoundingClientRect();
+	      return event.clientX >= rect.left && event.clientX <= rect.right && event.clientY >= rect.top && event.clientY <= rect.bottom;
+	    }
 
-	            checkForHiddenIssues({
-	                elsewhere: { what: 'all', where: 'all' },
-	                disabled_rules: { what: 'all', where: 'visible', includeDisabledRules: 'only' },
-	                disabled_rules_elsewhere: { what: 'all', where: 'all', includeDisabledRules: 'only' },
-	                ignored_issues: { what: 'all', where: 'visible', includeIgnored: 'only' },
-	                ignored_issues_elsewhere: { what: 'all', where: 'all', includeIgnored: 'only' }
-	            });
-	        } else if (opts.what === 'all' && opts.where === 'all') {
+	    function pointerDownOnSelection(skipPointerId) {
+	      var mode = context.mode();
+	      var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];
 
-	            messageType = 'everything';
+	      for (var pointerId in _downPointers) {
+	        if (pointerId === 'spacebar' || pointerId === skipPointerId) continue;
+	        var pointerInfo = _downPointers[pointerId];
+	        var p1 = pointGetter(pointerInfo.firstEvent);
+	        var p2 = pointGetter(pointerInfo.lastEvent);
+	        if (geoVecLength(p1, p2) > _tolerancePx) continue;
+	        var datum = pointerInfo.firstEvent.target.__data__;
+	        var entity = datum && datum.properties && datum.properties.entity || datum;
 
-	            checkForHiddenIssues({
-	                disabled_rules: { what: 'all', where: 'all', includeDisabledRules: 'only' },
-	                ignored_issues: { what: 'all', where: 'all', includeIgnored: 'only' }
-	            });
+	        if (context.graph().hasEntity(entity.id)) {
+	          return {
+	            pointerId: pointerId,
+	            entityId: entity.id,
+	            selected: selectedIDs.indexOf(entity.id) !== -1
+	          };
 	        }
+	      }
 
-	        if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
-	            messageType = 'no_edits';
-	        }
+	      return null;
+	    }
+	  }
 
-	        selection.select('.box .message')
-	            .text(_t('issues.no_issues.message.' + messageType));
+	  function processClick(datum, isMultiselect, point, alsoSelectId) {
+	    var mode = context.mode();
+	    var showMenu = _showMenu;
+	    var interactionType = _lastInteractionType;
+	    var entity = datum && datum.properties && datum.properties.entity;
+	    if (entity) datum = entity;
 
+	    if (datum && datum.type === 'midpoint') {
+	      // treat targeting midpoints as if targeting the parent way
+	      datum = datum.parents[0];
 	    }
 
-	    context.validator().on('validated.uiSectionValidationStatus', function() {
-	        window.requestIdleCallback(section.reRender);
-	    });
+	    var newMode;
 
-	    context.map().on('move.uiSectionValidationStatus',
-	        debounce(function() {
-	            window.requestIdleCallback(section.reRender);
-	        }, 1000)
-	    );
+	    if (datum instanceof osmEntity) {
+	      // targeting an entity
+	      var selectedIDs = context.selectedIDs();
+	      context.selectedNoteID(null);
+	      context.selectedErrorID(null);
 
-	    return section;
-	}
+	      if (!isMultiselect) {
+	        // don't change the selection if we're toggling the menu atop a multiselection
+	        if (!showMenu || selectedIDs.length <= 1 || selectedIDs.indexOf(datum.id) === -1) {
+	          if (alsoSelectId === datum.id) alsoSelectId = null;
+	          selectedIDs = (alsoSelectId ? [alsoSelectId] : []).concat([datum.id]); // always enter modeSelect even if the entity is already
+	          // selected since listeners may expect `context.enter` events,
+	          // e.g. in the walkthrough
 
-	function uiPaneIssues(context) {
+	          newMode = mode.id === 'select' ? mode.selectedIDs(selectedIDs) : modeSelect(context, selectedIDs).selectBehavior(behavior);
+	          context.enter(newMode);
+	        }
+	      } else {
+	        if (selectedIDs.indexOf(datum.id) !== -1) {
+	          // clicked entity is already in the selectedIDs list..
+	          if (!showMenu) {
+	            // deselect clicked entity, then reenter select mode or return to browse mode..
+	            selectedIDs = selectedIDs.filter(function (id) {
+	              return id !== datum.id;
+	            });
+	            newMode = selectedIDs.length ? mode.selectedIDs(selectedIDs) : modeBrowse(context).selectBehavior(behavior);
+	            context.enter(newMode);
+	          }
+	        } else {
+	          // clicked entity is not in the selected list, add it..
+	          selectedIDs = selectedIDs.concat([datum.id]);
+	          newMode = mode.selectedIDs(selectedIDs);
+	          context.enter(newMode);
+	        }
+	      }
+	    } else if (datum && datum.__featurehash__ && !isMultiselect) {
+	      // targeting custom data
+	      context.selectedNoteID(null).enter(modeSelectData(context, datum));
+	    } else if (datum instanceof osmNote && !isMultiselect) {
+	      // targeting a note
+	      context.selectedNoteID(datum.id).enter(modeSelectNote(context, datum.id));
+	    } else if (datum instanceof QAItem & !isMultiselect) {
+	      // targeting an external QA issue
+	      context.selectedErrorID(datum.id).enter(modeSelectError(context, datum.id, datum.service));
+	    } else {
+	      // targeting nothing
+	      context.selectedNoteID(null);
+	      context.selectedErrorID(null);
 
-	    var issuesPane = uiPane('issues', context)
-	        .key(_t('issues.key'))
-	        .title(_t('issues.title'))
-	        .description(_t('issues.title'))
-	        .iconName('iD-icon-alert')
-	        .sections([
-	            uiSectionValidationOptions(context),
-	            uiSectionValidationStatus(context),
-	            uiSectionValidationIssues('issues-errors', 'error', context),
-	            uiSectionValidationIssues('issues-warnings', 'warning', context),
-	            uiSectionValidationRules(context)
-	        ]);
+	      if (!isMultiselect && mode.id !== 'browse') {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
 
-	    return issuesPane;
-	}
+	    context.ui().closeEditMenu(); // always request to show the edit menu in case the mode needs it
 
-	function uiSettingsCustomData(context) {
-	    var dispatch$1 = dispatch('change');
+	    if (showMenu) context.ui().showEditMenu(point, interactionType);
+	    resetProperties();
+	  }
 
-	    function render(selection) {
-	        var dataLayer = context.layers().layer('data');
+	  function cancelLongPress() {
+	    if (_longPressTimeout) window.clearTimeout(_longPressTimeout);
+	    _longPressTimeout = null;
+	  }
 
-	        // keep separate copies of original and current settings
-	        var _origSettings = {
-	            fileList: (dataLayer && dataLayer.fileList()) || null,
-	            url: corePreferences('settings-custom-data-url')
-	        };
-	        var _currSettings = {
-	            fileList: (dataLayer && dataLayer.fileList()) || null,
-	            url: corePreferences('settings-custom-data-url')
-	        };
+	  function resetProperties() {
+	    cancelLongPress();
+	    _showMenu = false;
+	    _lastInteractionType = null; // don't reset _lastMouseEvent since it might still be useful
+	  }
 
-	        // var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
-	        var modal = uiConfirm(selection).okButton();
+	  function behavior(selection) {
+	    resetProperties();
+	    _lastMouseEvent = context.map().lastPointerEvent();
+	    select(window).on('keydown.select', keydown).on('keyup.select', keyup).on(_pointerPrefix + 'move.select', pointermove, true).on(_pointerPrefix + 'up.select', pointerup, true).on('pointercancel.select', pointercancel, true).on('contextmenu.select-window', function (d3_event) {
+	      // Edge and IE really like to show the contextmenu on the
+	      // menubar when user presses a keyboard menu button
+	      // even after we've already preventdefaulted the key event.
+	      var e = d3_event;
+
+	      if (+e.clientX === 0 && +e.clientY === 0) {
+	        d3_event.preventDefault();
+	      }
+	    });
+	    selection.on(_pointerPrefix + 'down.select', pointerdown).on('contextmenu.select', contextmenu);
+	    /*if (d3_event && d3_event.shiftKey) {
+	        context.surface()
+	            .classed('behavior-multiselect', true);
+	    }*/
+	  }
 
-	        modal
-	            .classed('settings-modal settings-custom-data', true);
+	  behavior.off = function (selection) {
+	    cancelLongPress();
+	    select(window).on('keydown.select', null).on('keyup.select', null).on('contextmenu.select-window', null).on(_pointerPrefix + 'move.select', null, true).on(_pointerPrefix + 'up.select', null, true).on('pointercancel.select', null, true);
+	    selection.on(_pointerPrefix + 'down.select', null).on('contextmenu.select', null);
+	    context.surface().classed('behavior-multiselect', false);
+	  };
 
-	        modal.select('.modal-section.header')
-	            .append('h3')
-	            .text(_t('settings.custom_data.header'));
+	  return behavior;
+	}
 
+	function operationContinue(context, selectedIDs) {
+	  var _entities = selectedIDs.map(function (id) {
+	    return context.graph().entity(id);
+	  });
 
-	        var textSection = modal.select('.modal-section.message-text');
+	  var _geometries = Object.assign({
+	    line: [],
+	    vertex: []
+	  }, utilArrayGroupBy(_entities, function (entity) {
+	    return entity.geometry(context.graph());
+	  }));
 
-	        textSection
-	            .append('pre')
-	            .attr('class', 'instructions-file')
-	            .text(_t('settings.custom_data.file.instructions'));
+	  var _vertex = _geometries.vertex.length && _geometries.vertex[0];
 
-	        textSection
-	            .append('input')
-	            .attr('class', 'field-file')
-	            .attr('type', 'file')
-	            .property('files', _currSettings.fileList)  // works for all except IE11
-	            .on('change', function() {
-	                var files = event.target.files;
-	                if (files && files.length) {
-	                    _currSettings.url = '';
-	                    textSection.select('.field-url').property('value', '');
-	                    _currSettings.fileList = files;
-	                } else {
-	                    _currSettings.fileList = null;
-	                }
-	            });
+	  function candidateWays() {
+	    return _vertex ? context.graph().parentWays(_vertex).filter(function (parent) {
+	      return parent.geometry(context.graph()) === 'line' && !parent.isClosed() && parent.affix(_vertex.id) && (_geometries.line.length === 0 || _geometries.line[0] === parent);
+	    }) : [];
+	  }
 
-	        textSection
-	            .append('h4')
-	            .text(_t('settings.custom_data.or'));
+	  var _candidates = candidateWays();
 
-	        textSection
-	            .append('pre')
-	            .attr('class', 'instructions-url')
-	            .text(_t('settings.custom_data.url.instructions'));
+	  var operation = function operation() {
+	    var candidate = _candidates[0];
+	    context.enter(modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(_vertex.id), true));
+	  };
 
-	        textSection
-	            .append('textarea')
-	            .attr('class', 'field-url')
-	            .attr('placeholder', _t('settings.custom_data.url.placeholder'))
-	            .call(utilNoAuto)
-	            .property('value', _currSettings.url);
+	  operation.relatedEntityIds = function () {
+	    return _candidates.length ? [_candidates[0].id] : [];
+	  };
 
+	  operation.available = function () {
+	    return _geometries.vertex.length === 1 && _geometries.line.length <= 1 && !context.features().hasHiddenConnections(_vertex, context.graph());
+	  };
 
-	        // insert a cancel button
-	        var buttonSection = modal.select('.modal-section.buttons');
+	  operation.disabled = function () {
+	    if (_candidates.length === 0) {
+	      return 'not_eligible';
+	    } else if (_candidates.length > 1) {
+	      return 'multiple';
+	    }
 
-	        buttonSection
-	            .insert('button', '.ok-button')
-	            .attr('class', 'button cancel-button secondary-action')
-	            .text(_t('confirm.cancel'));
+	    return false;
+	  };
 
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.continue.' + disable) : _t('operations.continue.description');
+	  };
 
-	        buttonSection.select('.cancel-button')
-	            .on('click.cancel', clickCancel);
+	  operation.annotation = function () {
+	    return _t('operations.continue.annotation.line');
+	  };
 
-	        buttonSection.select('.ok-button')
-	            .attr('disabled', isSaveDisabled)
-	            .on('click.save', clickSave);
+	  operation.id = 'continue';
+	  operation.keys = [_t('operations.continue.key')];
+	  operation.title = _t('operations.continue.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
+	function operationCopy(context, selectedIDs) {
+	  function getFilteredIdsToCopy() {
+	    return selectedIDs.filter(function (selectedID) {
+	      var entity = context.graph().hasEntity(selectedID); // don't copy untagged vertices separately from ways
 
-	        function isSaveDisabled() {
-	            return null;
-	        }
+	      return entity.hasInterestingTags() || entity.geometry(context.graph()) !== 'vertex';
+	    });
+	  }
 
+	  var operation = function operation() {
+	    var graph = context.graph();
+	    var selected = groupEntities(getFilteredIdsToCopy(), graph);
+	    var canCopy = [];
+	    var skip = {};
+	    var entity;
+	    var i;
 
-	        // restore the original url
-	        function clickCancel() {
-	            textSection.select('.field-url').property('value', _origSettings.url);
-	            corePreferences('settings-custom-data-url', _origSettings.url);
-	            this.blur();
-	            modal.close();
-	        }
+	    for (i = 0; i < selected.relation.length; i++) {
+	      entity = selected.relation[i];
 
-	        // accept the current url
-	        function clickSave() {
-	            _currSettings.url = textSection.select('.field-url').property('value').trim();
+	      if (!skip[entity.id] && entity.isComplete(graph)) {
+	        canCopy.push(entity.id);
+	        skip = getDescendants(entity.id, graph, skip);
+	      }
+	    }
 
-	            // one or the other but not both
-	            if (_currSettings.url) { _currSettings.fileList = null; }
-	            if (_currSettings.fileList) { _currSettings.url = ''; }
+	    for (i = 0; i < selected.way.length; i++) {
+	      entity = selected.way[i];
 
-	            corePreferences('settings-custom-data-url', _currSettings.url);
-	            this.blur();
-	            modal.close();
-	            dispatch$1.call('change', this, _currSettings);
-	        }
+	      if (!skip[entity.id]) {
+	        canCopy.push(entity.id);
+	        skip = getDescendants(entity.id, graph, skip);
+	      }
 	    }
 
-	    return utilRebind(render, dispatch$1, 'on');
-	}
+	    for (i = 0; i < selected.node.length; i++) {
+	      entity = selected.node[i];
 
-	function uiSectionDataLayers(context) {
+	      if (!skip[entity.id]) {
+	        canCopy.push(entity.id);
+	      }
+	    }
 
-	    var settingsCustomData = uiSettingsCustomData(context)
-	        .on('change', customChanged);
+	    context.copyIDs(canCopy);
 
-	    var layers = context.layers();
+	    if (_point && (canCopy.length !== 1 || graph.entity(canCopy[0]).type !== 'node')) {
+	      // store the anchor coordinates if copying more than a single node
+	      context.copyLonLat(context.projection.invert(_point));
+	    } else {
+	      context.copyLonLat(null);
+	    }
+	  };
 
-	    var section = uiSection('data-layers', context)
-	        .title(_t('map_data.data_layers'))
-	        .disclosureContent(renderDisclosureContent);
+	  function groupEntities(ids, graph) {
+	    var entities = ids.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    return Object.assign({
+	      relation: [],
+	      way: [],
+	      node: []
+	    }, utilArrayGroupBy(entities, 'type'));
+	  }
 
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.data-layer-container')
-	            .data([0]);
+	  function getDescendants(id, graph, descendants) {
+	    var entity = graph.entity(id);
+	    var children;
+	    descendants = descendants || {};
 
-	        container.enter()
-	            .append('div')
-	            .attr('class', 'data-layer-container')
-	            .merge(container)
-	            .call(drawOsmItems)
-	            .call(drawQAItems)
-	            .call(drawCustomDataItems)
-	            .call(drawVectorItems)      // Beta - Detroit mapping challenge
-	            .call(drawPanelItems);
+	    if (entity.type === 'relation') {
+	      children = entity.members.map(function (m) {
+	        return m.id;
+	      });
+	    } else if (entity.type === 'way') {
+	      children = entity.nodes;
+	    } else {
+	      children = [];
 	    }
 
-	    function showsLayer(which) {
-	        var layer = layers.layer(which);
-	        if (layer) {
-	            return layer.enabled();
-	        }
-	        return false;
+	    for (var i = 0; i < children.length; i++) {
+	      if (!descendants[children[i]]) {
+	        descendants[children[i]] = true;
+	        descendants = getDescendants(children[i], graph, descendants);
+	      }
 	    }
 
-	    function setLayer(which, enabled) {
-	        // Don't allow layer changes while drawing - #6584
-	        var mode = context.mode();
-	        if (mode && /^draw/.test(mode.id)) { return; }
+	    return descendants;
+	  }
 
-	        var layer = layers.layer(which);
-	        if (layer) {
-	            layer.enabled(enabled);
+	  operation.available = function () {
+	    return getFilteredIdsToCopy().length > 0;
+	  };
 
-	            if (!enabled && (which === 'osm' || which === 'notes')) {
-	                context.enter(modeBrowse(context));
-	            }
-	        }
-	    }
+	  operation.disabled = function () {
+	    var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
 
-	    function toggleLayer(which) {
-	        setLayer(which, !showsLayer(which));
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
 	    }
 
-	    function drawOsmItems(selection) {
-	        var osmKeys = ['osm', 'notes'];
-	        var osmLayers = layers.all().filter(function(obj) { return osmKeys.indexOf(obj.id) !== -1; });
-
-	        var ul = selection
-	            .selectAll('.layer-list-osm')
-	            .data([0]);
-
-	        ul = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-osm')
-	            .merge(ul);
+	    return false;
+	  };
 
-	        var li = ul.selectAll('.list-item')
-	            .data(osmLayers);
+	  operation.availableForKeypress = function () {
+	    var selection = window.getSelection && window.getSelection(); // if the user has text selected then let them copy that, not the selected feature
 
-	        li.exit()
-	            .remove();
+	    return !selection || !selection.toString();
+	  };
 
-	        var liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'list-item list-item-' + d.id; });
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.copy.' + disable, {
+	      n: selectedIDs.length
+	    }) : _t('operations.copy.description', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                if (d.id === 'osm') {
-	                    select(this)
-	                        .call(uiTooltip()
-	                            .title(_t('map_data.layers.' + d.id + '.tooltip'))
-	                            .keys([uiCmd('⌥' + _t('area_fill.wireframe.key'))])
-	                            .placement('bottom')
-	                        );
-	                } else {
-	                    select(this)
-	                        .call(uiTooltip()
-	                            .title(_t('map_data.layers.' + d.id + '.tooltip'))
-	                            .placement('bottom')
-	                        );
-	                }
-	            });
+	  operation.annotation = function () {
+	    return _t('operations.copy.annotation', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function(d) { toggleLayer(d.id); });
+	  var _point;
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) { return _t('map_data.layers.' + d.id + '.title'); });
+	  operation.point = function (val) {
+	    _point = val;
+	    return operation;
+	  };
 
+	  operation.id = 'copy';
+	  operation.keys = [uiCmd('⌘C')];
+	  operation.title = _t('operations.copy.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', function (d) { return d.layer.enabled(); })
-	            .selectAll('input')
-	            .property('checked', function (d) { return d.layer.enabled(); });
+	function operationDisconnect(context, selectedIDs) {
+	  var _vertexIDs = [];
+	  var _wayIDs = [];
+	  var _otherIDs = [];
+	  var _actions = [];
+	  selectedIDs.forEach(function (id) {
+	    var entity = context.entity(id);
+
+	    if (entity.type === 'way') {
+	      _wayIDs.push(id);
+	    } else if (entity.geometry(context.graph()) === 'vertex') {
+	      _vertexIDs.push(id);
+	    } else {
+	      _otherIDs.push(id);
 	    }
+	  });
 
-	    function drawQAItems(selection) {
-	        var qaKeys = ['keepRight', 'improveOSM', 'osmose'];
-	        var qaLayers = layers.all().filter(function(obj) { return qaKeys.indexOf(obj.id) !== -1; });
-
-	        var ul = selection
-	            .selectAll('.layer-list-qa')
-	            .data([0]);
+	  var _coords,
+	      _descriptionID = '',
+	      _annotationID = 'features';
 
-	        ul = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-qa')
-	            .merge(ul);
+	  var _disconnectingVertexIds = [];
+	  var _disconnectingWayIds = [];
 
-	        var li = ul.selectAll('.list-item')
-	            .data(qaLayers);
+	  if (_vertexIDs.length > 0) {
+	    // At the selected vertices, disconnect the selected ways, if any, else
+	    // disconnect all connected ways
+	    _disconnectingVertexIds = _vertexIDs;
 
-	        li.exit()
-	            .remove();
+	    _vertexIDs.forEach(function (vertexID) {
+	      var action = actionDisconnect(vertexID);
 
-	        var liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'list-item list-item-' + d.id; });
+	      if (_wayIDs.length > 0) {
+	        var waysIDsForVertex = _wayIDs.filter(function (wayID) {
+	          var way = context.entity(wayID);
+	          return way.nodes.indexOf(vertexID) !== -1;
+	        });
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                select(this)
-	                    .call(uiTooltip()
-	                        .title(_t('map_data.layers.' + d.id + '.tooltip'))
-	                        .placement('bottom')
-	                    );
-	            });
+	        action.limitWays(waysIDsForVertex);
+	      }
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function(d) { toggleLayer(d.id); });
+	      _actions.push(action);
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) { return _t('map_data.layers.' + d.id + '.title'); });
+	      _disconnectingWayIds = _disconnectingWayIds.concat(context.graph().parentWays(context.graph().entity(vertexID)).map(function (d) {
+	        return d.id;
+	      }));
+	    });
 
+	    _disconnectingWayIds = utilArrayUniq(_disconnectingWayIds).filter(function (id) {
+	      return _wayIDs.indexOf(id) === -1;
+	    });
+	    _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', function (d) { return d.layer.enabled(); })
-	            .selectAll('input')
-	            .property('checked', function (d) { return d.layer.enabled(); });
+	    if (_wayIDs.length === 1) {
+	      _descriptionID += 'single_way.' + context.graph().geometry(_wayIDs[0]);
+	    } else {
+	      _descriptionID += _wayIDs.length === 0 ? 'no_ways' : 'multiple_ways';
 	    }
+	  } else if (_wayIDs.length > 0) {
+	    // Disconnect the selected ways from each other, if they're connected,
+	    // else disconnect them from all connected ways
+	    var ways = _wayIDs.map(function (id) {
+	      return context.entity(id);
+	    });
 
-	    // Beta feature - sample vector layers to support Detroit Mapping Challenge
-	    // https://github.com/osmus/detroit-mapping-challenge
-	    function drawVectorItems(selection) {
-	        var dataLayer = layers.layer('data');
-	        var vtData = [
-	            {
-	                name: 'Detroit Neighborhoods/Parks',
-	                src: 'neighborhoods-parks',
-	                tooltip: 'Neighborhood boundaries and parks as compiled by City of Detroit in concert with community groups.',
-	                template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmur6x34562qp9iv1u3ksf-54hev,jonahadkins.cjksmqxdx33jj2wp90xd9x2md-4e5y2/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
-	            }, {
-	                name: 'Detroit Composite POIs',
-	                src: 'composite-poi',
-	                tooltip: 'Fire Inspections, Business Licenses, and other public location data collated from the City of Detroit.',
-	                template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmm6a02sli31myxhsr7zf3-2sw8h/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
-	            }, {
-	                name: 'Detroit All-The-Places POIs',
-	                src: 'alltheplaces-poi',
-	                tooltip: 'Public domain business location data created by web scrapers.',
-	                template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmswgk340g2vo06p1w9w0j-8fjjc/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
-	            }
-	        ];
+	    var nodes = utilGetAllNodes(_wayIDs, context.graph());
+	    _coords = nodes.map(function (n) {
+	      return n.loc;
+	    }); // actions for connected nodes shared by at least two selected ways
+
+	    var sharedActions = [];
+	    var sharedNodes = []; // actions for connected nodes
 
-	        // Only show this if the map is around Detroit..
-	        var detroit = geoExtent([-83.5, 42.1], [-82.8, 42.5]);
-	        var showVectorItems = (context.map().zoom() > 9 && detroit.contains(context.map().center()));
+	    var unsharedActions = [];
+	    var unsharedNodes = [];
+	    nodes.forEach(function (node) {
+	      var action = actionDisconnect(node.id).limitWays(_wayIDs);
 
-	        var container = selection.selectAll('.vectortile-container')
-	            .data(showVectorItems ? [0] : []);
+	      if (action.disabled(context.graph()) !== 'not_connected') {
+	        var count = 0;
 
-	        container.exit()
-	            .remove();
+	        for (var i in ways) {
+	          var way = ways[i];
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'vectortile-container');
+	          if (way.nodes.indexOf(node.id) !== -1) {
+	            count += 1;
+	          }
 
-	        containerEnter
-	            .append('h4')
-	            .attr('class', 'vectortile-header')
-	            .text('Detroit Vector Tiles (Beta)');
+	          if (count > 1) break;
+	        }
 
-	        containerEnter
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-vectortile');
+	        if (count > 1) {
+	          sharedActions.push(action);
+	          sharedNodes.push(node);
+	        } else {
+	          unsharedActions.push(action);
+	          unsharedNodes.push(node);
+	        }
+	      }
+	    });
+	    _descriptionID += 'no_points.';
+	    _descriptionID += _wayIDs.length === 1 ? 'single_way.' : 'multiple_ways.';
+
+	    if (sharedActions.length) {
+	      // if any nodes are shared, only disconnect the selected ways from each other
+	      _actions = sharedActions;
+	      _disconnectingVertexIds = sharedNodes.map(function (node) {
+	        return node.id;
+	      });
+	      _descriptionID += 'conjoined';
+	      _annotationID = 'from_each_other';
+	    } else {
+	      // if no nodes are shared, disconnect the selected ways from all connected ways
+	      _actions = unsharedActions;
+	      _disconnectingVertexIds = unsharedNodes.map(function (node) {
+	        return node.id;
+	      });
 
-	        containerEnter
-	            .append('div')
-	            .attr('class', 'vectortile-footer')
-	            .append('a')
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-out-link', 'inline'))
-	            .attr('href', 'https://github.com/osmus/detroit-mapping-challenge')
-	            .append('span')
-	            .text('About these layers');
+	      if (_wayIDs.length === 1) {
+	        _descriptionID += context.graph().geometry(_wayIDs[0]);
+	      } else {
+	        _descriptionID += 'separate';
+	      }
+	    }
+	  }
 
-	        container = container
-	            .merge(containerEnter);
+	  var _extent = utilTotalExtent(_disconnectingVertexIds, context.graph());
 
+	  var operation = function operation() {
+	    context.perform(function (graph) {
+	      return _actions.reduce(function (graph, action) {
+	        return action(graph);
+	      }, graph);
+	    }, operation.annotation());
+	    context.validator().validate();
+	  };
 
-	        var ul = container.selectAll('.layer-list-vectortile');
+	  operation.relatedEntityIds = function () {
+	    if (_vertexIDs.length) {
+	      return _disconnectingWayIds;
+	    }
 
-	        var li = ul.selectAll('.list-item')
-	            .data(vtData);
+	    return _disconnectingVertexIds;
+	  };
 
-	        li.exit()
-	            .remove();
+	  operation.available = function () {
+	    if (_actions.length === 0) return false;
+	    if (_otherIDs.length !== 0) return false;
+	    if (_vertexIDs.length !== 0 && _wayIDs.length !== 0 && !_wayIDs.every(function (wayID) {
+	      return _vertexIDs.some(function (vertexID) {
+	        var way = context.entity(wayID);
+	        return way.nodes.indexOf(vertexID) !== -1;
+	      });
+	    })) return false;
+	    return true;
+	  };
 
-	        var liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'list-item list-item-' + d.src; });
+	  operation.disabled = function () {
+	    var reason;
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                select(this).call(
-	                    uiTooltip().title(d.tooltip).placement('top')
-	                );
-	            });
+	    for (var actionIndex in _actions) {
+	      reason = _actions[actionIndex].disabled(context.graph());
+	      if (reason) return reason;
+	    }
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'radio')
-	            .attr('name', 'vectortile')
-	            .on('change', selectVTLayer);
+	    if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large.' + ((_vertexIDs.length ? _vertexIDs : _wayIDs).length === 1 ? 'single' : 'multiple');
+	    } else if (_coords && someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    }
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) { return d.name; });
+	    return false;
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', isVTLayerSelected)
-	            .selectAll('input')
-	            .property('checked', isVTLayerSelected);
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	        function isVTLayerSelected(d) {
-	            return dataLayer && dataLayer.template() === d.template;
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
 	        }
+	      }
 
-	        function selectVTLayer(d) {
-	            corePreferences('settings-custom-data-url', d.template);
-	            if (dataLayer) {
-	                dataLayer.template(d.template, d.src);
-	                dataLayer.enabled(true);
-	            }
-	        }
+	      return false;
 	    }
+	  };
 
-	    function drawCustomDataItems(selection) {
-	        var dataLayer = layers.layer('data');
-	        var hasData = dataLayer && dataLayer.hasData();
-	        var showsData = hasData && dataLayer.enabled();
-
-	        var ul = selection
-	            .selectAll('.layer-list-data')
-	            .data(dataLayer ? [0] : []);
-
-	        // Exit
-	        ul.exit()
-	            .remove();
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
 
-	        // Enter
-	        var ulEnter = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-data');
+	    if (disable) {
+	      return _t('operations.disconnect.' + disable);
+	    }
 
-	        var liEnter = ulEnter
-	            .append('li')
-	            .attr('class', 'list-item-data');
+	    return _t('operations.disconnect.description.' + _descriptionID);
+	  };
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('map_data.layers.custom.tooltip'))
-	                .placement('top')
-	            );
+	  operation.annotation = function () {
+	    return _t('operations.disconnect.annotation.' + _annotationID);
+	  };
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() { toggleLayer('data'); });
+	  operation.id = 'disconnect';
+	  operation.keys = [_t('operations.disconnect.key')];
+	  operation.title = _t('operations.disconnect.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	        labelEnter
-	            .append('span')
-	            .text(_t('map_data.layers.custom.title'));
+	function operationDowngrade(context, selectedIDs) {
+	  var _affectedFeatureCount = 0;
 
-	        liEnter
-	            .append('button')
-	            .call(uiTooltip()
-	                .title(_t('settings.custom_data.tooltip'))
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            )
-	            .on('click', editCustom)
-	            .call(svgIcon('#iD-icon-more'));
-
-	        liEnter
-	            .append('button')
-	            .call(uiTooltip()
-	                .title(_t('map_data.layers.custom.zoom'))
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            )
-	            .on('click', function() {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                dataLayer.fitZoom();
-	            })
-	            .call(svgIcon('#iD-icon-framed-dot'));
+	  var _downgradeType = downgradeTypeForEntityIDs(selectedIDs);
 
-	        // Update
-	        ul = ul
-	            .merge(ulEnter);
+	  var _multi = _affectedFeatureCount === 1 ? 'single' : 'multiple';
 
-	        ul.selectAll('.list-item-data')
-	            .classed('active', showsData)
-	            .selectAll('label')
-	            .classed('deemphasize', !hasData)
-	            .selectAll('input')
-	            .property('disabled', !hasData)
-	            .property('checked', showsData);
-	    }
+	  function downgradeTypeForEntityIDs(entityIds) {
+	    var downgradeType;
+	    _affectedFeatureCount = 0;
 
-	    function editCustom() {
-	        event.preventDefault();
-	        context.container()
-	            .call(settingsCustomData);
-	    }
+	    for (var i in entityIds) {
+	      var entityID = entityIds[i];
+	      var type = downgradeTypeForEntityID(entityID);
 
-	    function customChanged(d) {
-	        var dataLayer = layers.layer('data');
+	      if (type) {
+	        _affectedFeatureCount += 1;
 
-	        if (d && d.url) {
-	            dataLayer.url(d.url);
-	        } else if (d && d.fileList) {
-	            dataLayer.fileList(d.fileList);
+	        if (downgradeType && type !== downgradeType) {
+	          if (downgradeType !== 'generic' && type !== 'generic') {
+	            downgradeType = 'building_address';
+	          } else {
+	            downgradeType = 'generic';
+	          }
+	        } else {
+	          downgradeType = type;
 	        }
+	      }
 	    }
 
+	    return downgradeType;
+	  }
 
-	    function drawPanelItems(selection) {
+	  function downgradeTypeForEntityID(entityID) {
+	    var graph = context.graph();
+	    var entity = graph.entity(entityID);
+	    var preset = _mainPresetIndex.match(entity, graph);
+	    if (!preset || preset.isFallback()) return null;
 
-	        var panelsListEnter = selection.selectAll('.md-extras-list')
-	            .data([0])
-	            .enter()
-	            .append('ul')
-	            .attr('class', 'layer-list md-extras-list');
-
-	        var historyPanelLabelEnter = panelsListEnter
-	            .append('li')
-	            .attr('class', 'history-panel-toggle-item')
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('map_data.history_panel.tooltip'))
-	                .keys([uiCmd('⌘⇧' + _t('info_panels.history.key'))])
-	                .placement('top')
-	            );
-
-	        historyPanelLabelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() {
-	                event.preventDefault();
-	                context.ui().info.toggle('history');
-	            });
+	    if (entity.type === 'node' && preset.id !== 'address' && Object.keys(entity.tags).some(function (key) {
+	      return key.match(/^addr:.{1,}/);
+	    })) {
+	      return 'address';
+	    }
 
-	        historyPanelLabelEnter
-	            .append('span')
-	            .text(_t('map_data.history_panel.title'));
-
-	        var measurementPanelLabelEnter = panelsListEnter
-	            .append('li')
-	            .attr('class', 'measurement-panel-toggle-item')
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('map_data.measurement_panel.tooltip'))
-	                .keys([uiCmd('⌘⇧' + _t('info_panels.measurement.key'))])
-	                .placement('top')
-	            );
-
-	        measurementPanelLabelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() {
-	                event.preventDefault();
-	                context.ui().info.toggle('measurement');
-	            });
+	    var geometry = entity.geometry(graph);
 
-	        measurementPanelLabelEnter
-	            .append('span')
-	            .text(_t('map_data.measurement_panel.title'));
+	    if (geometry === 'area' && entity.tags.building && !preset.tags.building) {
+	      return 'building';
 	    }
 
-	    context.layers().on('change.uiSectionDataLayers', section.reRender);
-
-	    context.map()
-	        .on('move.uiSectionDataLayers',
-	            debounce(function() {
-	                // Detroit layers may have moved in or out of view
-	                window.requestIdleCallback(section.reRender);
-	            }, 1000)
-	        );
+	    if (geometry === 'vertex' && Object.keys(entity.tags).length) {
+	      return 'generic';
+	    }
 
-	    return section;
-	}
+	    return null;
+	  }
 
-	function uiSectionMapFeatures(context) {
+	  var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
+	  var addressKeysToKeep = ['source'];
 
-	    var _features = context.features().keys();
+	  var operation = function operation() {
+	    context.perform(function (graph) {
+	      for (var i in selectedIDs) {
+	        var entityID = selectedIDs[i];
+	        var type = downgradeTypeForEntityID(entityID);
+	        if (!type) continue;
+	        var tags = Object.assign({}, graph.entity(entityID).tags); // shallow copy
 
-	    var section = uiSection('map-features', context)
-	        .title(_t('map_data.map_features'))
-	        .disclosureContent(renderDisclosureContent)
-	        .expandedByDefault(false);
+	        for (var key in tags) {
+	          if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) continue;
 
-	    function renderDisclosureContent(selection) {
+	          if (type === 'building') {
+	            if (buildingKeysToKeep.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
+	          }
 
-	        var container = selection.selectAll('.layer-feature-list-container')
-	            .data([0]);
+	          if (type !== 'generic') {
+	            if (key.match(/^addr:.{1,}/) || key.match(/^source:.{1,}/)) continue;
+	          }
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'layer-feature-list-container');
+	          delete tags[key];
+	        }
 
-	        containerEnter
-	            .append('ul')
-	            .attr('class', 'layer-list layer-feature-list');
+	        graph = actionChangeTags(entityID, tags)(graph);
+	      }
 
-	        var footer = containerEnter
-	            .append('div')
-	            .attr('class', 'feature-list-links section-footer');
-
-	        footer
-	            .append('a')
-	            .attr('class', 'feature-list-link')
-	            .attr('href', '#')
-	            .text(_t('issues.enable_all'))
-	            .on('click', function() {
-	                context.features().enableAll();
-	            });
+	      return graph;
+	    }, operation.annotation());
+	    context.validator().validate(); // refresh the select mode to enable the delete operation
 
-	        footer
-	            .append('a')
-	            .attr('class', 'feature-list-link')
-	            .attr('href', '#')
-	            .text(_t('issues.disable_all'))
-	            .on('click', function() {
-	                context.features().disableAll();
-	            });
+	    context.enter(modeSelect(context, selectedIDs));
+	  };
 
-	        // Update
-	        container = container
-	            .merge(containerEnter);
+	  operation.available = function () {
+	    return _downgradeType;
+	  };
 
-	        container.selectAll('.layer-feature-list')
-	            .call(drawListItems, _features, 'checkbox', 'feature', clickFeature, showsFeature);
+	  operation.disabled = function () {
+	    if (selectedIDs.some(hasWikidataTag)) {
+	      return 'has_wikidata_tag';
 	    }
 
-	    function drawListItems(selection, data, type, name, change, active) {
-	        var items = selection.selectAll('li')
-	            .data(data);
-
-	        // Exit
-	        items.exit()
-	            .remove();
-
-	        // Enter
-	        var enter = items.enter()
-	            .append('li')
-	            .call(uiTooltip()
-	                .title(function(d) {
-	                    var tip = _t(name + '.' + d + '.tooltip');
-	                    if (autoHiddenFeature(d)) {
-	                        var msg = showsLayer('osm') ? _t('map_data.autohidden') : _t('map_data.osmhidden');
-	                        tip += '<div>' + msg + '</div>';
-	                    }
-	                    return tip;
-	                })
-	                .placement('top')
-	            );
-
-	        var label = enter
-	            .append('label');
+	    return false;
 
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', name)
-	            .on('change', change);
+	    function hasWikidataTag(id) {
+	      var entity = context.entity(id);
+	      return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+	    }
+	  };
 
-	        label
-	            .append('span')
-	            .text(function(d) { return _t(name + '.' + d + '.description'); });
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.downgrade.' + disable + '.' + _multi) : _t('operations.downgrade.description.' + _downgradeType);
+	  };
 
-	        // Update
-	        items = items
-	            .merge(enter);
+	  operation.annotation = function () {
+	    var suffix;
 
-	        items
-	            .classed('active', active)
-	            .selectAll('input')
-	            .property('checked', active)
-	            .property('indeterminate', autoHiddenFeature);
+	    if (_downgradeType === 'building_address') {
+	      suffix = 'generic';
+	    } else {
+	      suffix = _downgradeType;
 	    }
 
-	    function autoHiddenFeature(d) {
-	        return context.features().autoHidden(d);
-	    }
+	    return _t('operations.downgrade.annotation.' + suffix, {
+	      n: _affectedFeatureCount
+	    });
+	  };
 
-	    function showsFeature(d) {
-	        return context.features().enabled(d);
-	    }
+	  operation.id = 'downgrade';
+	  operation.keys = [uiCmd('⌫')];
+	  operation.title = _t('operations.downgrade.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	    function clickFeature(d) {
-	        context.features().toggle(d);
-	    }
+	function operationExtract(context, selectedIDs) {
+	  var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
 
-	    function showsLayer(id) {
-	        var layer = context.layers().layer(id);
-	        return layer && layer.enabled();
-	    }
+	  var _geometries = utilArrayUniq(selectedIDs.map(function (entityID) {
+	    return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
+	  }).filter(Boolean));
 
-	    // add listeners
-	    context.features()
-	        .on('change.map_features', section.reRender);
+	  var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
 
-	    return section;
-	}
+	  var _extent;
 
-	function uiSectionMapStyleOptions(context) {
+	  var _actions = selectedIDs.map(function (entityID) {
+	    var graph = context.graph();
+	    var entity = graph.hasEntity(entityID);
+	    if (!entity || !entity.hasInterestingTags()) return null;
+	    if (entity.type === 'node' && graph.parentWays(entity).length === 0) return null;
 
-	    var section = uiSection('fill-area', context)
-	        .title(_t('map_data.style_options'))
-	        .disclosureContent(renderDisclosureContent)
-	        .expandedByDefault(false);
-
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.layer-fill-list')
-	            .data([0]);
-
-	        container.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-fill-list')
-	            .merge(container)
-	            .call(drawListItems, context.map().areaFillOptions, 'radio', 'area_fill', setFill, isActiveFill);
-
-	        var container2 = selection.selectAll('.layer-visual-diff-list')
-	            .data([0]);
-
-	        container2.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-visual-diff-list')
-	            .merge(container2)
-	            .call(drawListItems, ['highlight_edits'], 'checkbox', 'visual_diff', toggleHighlightEdited, function() {
-	                return context.surface().classed('highlight-edited');
-	            });
+	    if (entity.type !== 'node') {
+	      var preset = _mainPresetIndex.match(entity, graph); // only allow extraction from ways/relations if the preset supports points
+
+	      if (preset.geometry.indexOf('point') === -1) return null;
 	    }
 
-	    function drawListItems(selection, data, type, name, change, active) {
-	        var items = selection.selectAll('li')
-	            .data(data);
+	    _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
+	    return actionExtract(entityID, context.projection);
+	  }).filter(Boolean);
 
-	        // Exit
-	        items.exit()
-	            .remove();
+	  var operation = function operation() {
+	    var combinedAction = function combinedAction(graph) {
+	      _actions.forEach(function (action) {
+	        graph = action(graph);
+	      });
 
-	        // Enter
-	        var enter = items.enter()
-	            .append('li')
-	            .call(uiTooltip()
-	                .title(function(d) {
-	                    return _t(name + '.' + d + '.tooltip');
-	                })
-	                .keys(function(d) {
-	                    var key = (d === 'wireframe' ? _t('area_fill.wireframe.key') : null);
-	                    if (d === 'highlight_edits') { key = _t('map_data.highlight_edits.key'); }
-	                    return key ? [key] : null;
-	                })
-	                .placement('top')
-	            );
+	      return graph;
+	    };
 
-	        var label = enter
-	            .append('label');
+	    context.perform(combinedAction, operation.annotation()); // do the extract
 
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', name)
-	            .on('change', change);
+	    var extractedNodeIDs = _actions.map(function (action) {
+	      return action.getExtractedNodeID();
+	    });
 
-	        label
-	            .append('span')
-	            .text(function(d) { return _t(name + '.' + d + '.description'); });
+	    context.enter(modeSelect(context, extractedNodeIDs));
+	  };
 
-	        // Update
-	        items = items
-	            .merge(enter);
+	  operation.available = function () {
+	    return _actions.length && selectedIDs.length === _actions.length;
+	  };
 
-	        items
-	            .classed('active', active)
-	            .selectAll('input')
-	            .property('checked', active)
-	            .property('indeterminate', false);
+	  operation.disabled = function () {
+	    if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (selectedIDs.some(function (entityID) {
+	      return context.graph().geometry(entityID) === 'vertex' && context.hasHiddenConnections(entityID);
+	    })) {
+	      return 'connected_to_hidden';
 	    }
 
-	    function isActiveFill(d) {
-	        return context.map().activeAreaFill() === d;
-	    }
+	    return false;
+	  };
 
-	    function toggleHighlightEdited() {
-	        event.preventDefault();
-	        context.map().toggleHighlightEdited();
-	    }
+	  operation.tooltip = function () {
+	    var disableReason = operation.disabled();
 
-	    function setFill(d) {
-	        context.map().activeAreaFill(d);
+	    if (disableReason) {
+	      return _t('operations.extract.' + disableReason + '.' + _amount);
+	    } else {
+	      return _t('operations.extract.description.' + _geometryID + '.' + _amount);
 	    }
+	  };
 
-	    context.map()
-	        .on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
+	  operation.annotation = function () {
+	    return _t('operations.extract.annotation', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	    return section;
+	  operation.id = 'extract';
+	  operation.keys = [_t('operations.extract.key')];
+	  operation.title = _t('operations.extract.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
-	function uiSectionPhotoOverlays(context) {
+	function operationMerge(context, selectedIDs) {
+	  var _action = getAction();
+
+	  function getAction() {
+	    // prefer a non-disabled action first
+	    var join = actionJoin(selectedIDs);
+	    if (!join.disabled(context.graph())) return join;
+	    var merge = actionMerge(selectedIDs);
+	    if (!merge.disabled(context.graph())) return merge;
+	    var mergePolygon = actionMergePolygon(selectedIDs);
+	    if (!mergePolygon.disabled(context.graph())) return mergePolygon;
+	    var mergeNodes = actionMergeNodes(selectedIDs);
+	    if (!mergeNodes.disabled(context.graph())) return mergeNodes; // otherwise prefer an action with an interesting disabled reason
+
+	    if (join.disabled(context.graph()) !== 'not_eligible') return join;
+	    if (merge.disabled(context.graph()) !== 'not_eligible') return merge;
+	    if (mergePolygon.disabled(context.graph()) !== 'not_eligible') return mergePolygon;
+	    return mergeNodes;
+	  }
+
+	  var operation = function operation() {
+	    if (operation.disabled()) return;
+	    context.perform(_action, operation.annotation());
+	    context.validator().validate();
+	    var resultIDs = selectedIDs.filter(context.hasEntity);
+
+	    if (resultIDs.length > 1) {
+	      var interestingIDs = resultIDs.filter(function (id) {
+	        return context.entity(id).hasInterestingTags();
+	      });
+	      if (interestingIDs.length) resultIDs = interestingIDs;
+	    }
 
-	    var layers = context.layers();
+	    context.enter(modeSelect(context, resultIDs));
+	  };
 
-	    var section = uiSection('photo-overlays', context)
-	        .title(_t('photo_overlays.title'))
-	        .disclosureContent(renderDisclosureContent)
-	        .expandedByDefault(false);
+	  operation.available = function () {
+	    return selectedIDs.length >= 2;
+	  };
 
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.photo-overlay-container')
-	            .data([0]);
+	  operation.disabled = function () {
+	    var actionDisabled = _action.disabled(context.graph());
 
-	        container.enter()
-	            .append('div')
-	            .attr('class', 'photo-overlay-container')
-	            .merge(container)
-	            .call(drawPhotoItems)
-	            .call(drawPhotoTypeItems);
-	    }
+	    if (actionDisabled) return actionDisabled;
+	    var osm = context.connection();
 
-	    function drawPhotoItems(selection) {
-	        var photoKeys = context.photos().overlayLayerIDs();
-	        var photoLayers = layers.all().filter(function(obj) { return photoKeys.indexOf(obj.id) !== -1; });
-	        var data = photoLayers.filter(function(obj) { return obj.layer.supported(); });
+	    if (osm && _action.resultingWayNodesLength && _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
+	      return 'too_many_vertices';
+	    }
 
-	        function layerSupported(d) {
-	            return d.layer && d.layer.supported();
-	        }
-	        function layerEnabled(d) {
-	            return layerSupported(d) && d.layer.enabled();
-	        }
+	    return false;
+	  };
 
-	        var ul = selection
-	            .selectAll('.layer-list-photos')
-	            .data([0]);
+	  operation.tooltip = function () {
+	    var disabled = operation.disabled();
 
-	        ul = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-photos')
-	            .merge(ul);
+	    if (disabled) {
+	      if (disabled === 'conflicting_relations') {
+	        return _t('operations.merge.conflicting_relations');
+	      }
 
-	        var li = ul.selectAll('.list-item-photos')
-	            .data(data);
+	      if (disabled === 'restriction' || disabled === 'connectivity') {
+	        return _t('operations.merge.damage_relation', {
+	          relation: _mainPresetIndex.item('type/' + disabled).name()
+	        });
+	      }
 
-	        li.exit()
-	            .remove();
+	      return _t('operations.merge.' + disabled);
+	    }
 
-	        var liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) {
-	                var classes = 'list-item-photos list-item-' + d.id;
-	                if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
-	                    classes += ' indented';
-	                }
-	                return classes;
-	            });
+	    return _t('operations.merge.description');
+	  };
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                var titleID;
-	                if (d.id === 'mapillary-signs') { titleID = 'mapillary.signs.tooltip'; }
-	                else if (d.id === 'mapillary') { titleID = 'mapillary_images.tooltip'; }
-	                else if (d.id === 'openstreetcam') { titleID = 'openstreetcam_images.tooltip'; }
-	                else { titleID = d.id.replace(/-/g, '_') + '.tooltip'; }
-	                select(this)
-	                    .call(uiTooltip()
-	                        .title(_t(titleID))
-	                        .placement('top')
-	                    );
-	            });
+	  operation.annotation = function () {
+	    return _t('operations.merge.annotation', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function(d) { toggleLayer(d.id); });
-
-	        labelEnter
-	            .append('span')
-	            .text(function(d) {
-	                var id = d.id;
-	                if (id === 'mapillary-signs') { id = 'photo_overlays.traffic_signs'; }
-	                return _t(id.replace(/-/g, '_') + '.title');
-	            });
+	  operation.id = 'merge';
+	  operation.keys = [_t('operations.merge.key')];
+	  operation.title = _t('operations.merge.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
+	function operationPaste(context) {
+	  var _pastePoint;
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', layerEnabled)
-	            .selectAll('input')
-	            .property('checked', layerEnabled);
-	    }
+	  var operation = function operation() {
+	    if (!_pastePoint) return;
+	    var oldIDs = context.copyIDs();
+	    if (!oldIDs.length) return;
+	    var projection = context.projection;
+	    var extent = geoExtent();
+	    var oldGraph = context.copyGraph();
+	    var newIDs = [];
+	    var action = actionCopyEntities(oldIDs, oldGraph);
+	    context.perform(action);
+	    var copies = action.copies();
+	    var originals = new Set();
+	    Object.values(copies).forEach(function (entity) {
+	      originals.add(entity.id);
+	    });
 
-	    function drawPhotoTypeItems(selection) {
-	        var data = context.photos().allPhotoTypes();
+	    for (var id in copies) {
+	      var oldEntity = oldGraph.entity(id);
+	      var newEntity = copies[id];
 
-	        function typeEnabled(d) {
-	            return context.photos().showsPhotoType(d);
-	        }
+	      extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
-	        var ul = selection
-	            .selectAll('.layer-list-photo-types')
-	            .data(context.photos().shouldFilterByPhotoType() ? [0] : []);
 
-	        ul.exit()
-	            .remove();
+	      var parents = context.graph().parentWays(newEntity);
+	      var parentCopied = parents.some(function (parent) {
+	        return originals.has(parent.id);
+	      });
 
-	        ul = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-photo-types')
-	            .merge(ul);
+	      if (!parentCopied) {
+	        newIDs.push(newEntity.id);
+	      }
+	    } // Use the location of the copy operation to offset the paste location,
+	    // or else use the center of the pasted extent
 
-	        var li = ul.selectAll('.list-item-photo-types')
-	            .data(data);
 
-	        li.exit()
-	            .remove();
+	    var copyPoint = context.copyLonLat() && projection(context.copyLonLat()) || projection(extent.center());
+	    var delta = geoVecSubtract(_pastePoint, copyPoint); // Move the pasted objects to be anchored at the paste location
 
-	        var liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) {
-	                return 'list-item-photo-types list-item-' + d;
-	            });
+	    context.replace(actionMove(newIDs, delta, projection), operation.annotation());
+	    context.enter(modeSelect(context, newIDs));
+	  };
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                select(this)
-	                    .call(uiTooltip()
-	                        .title(_t('photo_overlays.photo_type.' + d + '.tooltip'))
-	                        .placement('top')
-	                    );
-	            });
+	  operation.point = function (val) {
+	    _pastePoint = val;
+	    return operation;
+	  };
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function(d) {
-	                context.photos().togglePhotoType(d);
-	            });
+	  operation.available = function () {
+	    return context.mode().id === 'browse';
+	  };
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) {
-	                return _t('photo_overlays.photo_type.' + d + '.title');
-	            });
+	  operation.disabled = function () {
+	    return !context.copyIDs().length;
+	  };
 
+	  operation.tooltip = function () {
+	    var oldGraph = context.copyGraph();
+	    var ids = context.copyIDs();
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', typeEnabled)
-	            .selectAll('input')
-	            .property('checked', typeEnabled);
+	    if (!ids.length) {
+	      return _t('operations.paste.nothing_copied');
 	    }
 
-	    function toggleLayer(which) {
-	        setLayer(which, !showsLayer(which));
-	    }
+	    return _t('operations.paste.description', {
+	      feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph),
+	      n: ids.length
+	    });
+	  };
 
-	    function showsLayer(which) {
-	        var layer = layers.layer(which);
-	        if (layer) {
-	            return layer.enabled();
-	        }
-	        return false;
-	    }
+	  operation.annotation = function () {
+	    var ids = context.copyIDs();
+	    return _t('operations.paste.annotation', {
+	      n: ids.length
+	    });
+	  };
 
-	    function setLayer(which, enabled) {
-	        var layer = layers.layer(which);
-	        if (layer) {
-	            layer.enabled(enabled);
-	        }
-	    }
+	  operation.id = 'paste';
+	  operation.keys = [uiCmd('⌘V')];
+	  operation.title = _t('operations.paste.title');
+	  return operation;
+	}
 
-	    context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
-	    context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
+	function operationReverse(context, selectedIDs) {
+	  var operation = function operation() {
+	    context.perform(function combinedReverseAction(graph) {
+	      actions().forEach(function (action) {
+	        graph = action(graph);
+	      });
+	      return graph;
+	    }, operation.annotation());
+	    context.validator().validate();
+	  };
 
-	    return section;
-	}
+	  function actions(situation) {
+	    return selectedIDs.map(function (entityID) {
+	      var entity = context.hasEntity(entityID);
+	      if (!entity) return null;
 
-	function uiPaneMapData(context) {
+	      if (situation === 'toolbar') {
+	        if (entity.type === 'way' && !entity.isOneWay() && !entity.isSided()) return null;
+	      }
 
-	    var mapDataPane = uiPane('map-data', context)
-	        .key(_t('map_data.key'))
-	        .title(_t('map_data.title'))
-	        .description(_t('map_data.description'))
-	        .iconName('iD-icon-data')
-	        .sections([
-	            uiSectionDataLayers(context),
-	            uiSectionPhotoOverlays(context),
-	            uiSectionMapStyleOptions(context),
-	            uiSectionMapFeatures(context)
-	        ]);
+	      var geometry = entity.geometry(context.graph());
+	      if (entity.type !== 'node' && geometry !== 'line') return null;
+	      var action = actionReverse(entityID);
+	      if (action.disabled(context.graph())) return null;
+	      return action;
+	    }).filter(Boolean);
+	  }
 
-	    return mapDataPane;
-	}
+	  function reverseTypeID() {
+	    var acts = actions();
+	    var nodeActionCount = acts.filter(function (act) {
+	      var entity = context.hasEntity(act.entityID());
+	      return entity && entity.type === 'node';
+	    }).length;
+	    if (nodeActionCount === 0) return 'line';
+	    if (nodeActionCount === acts.length) return 'point';
+	    return 'feature';
+	  }
 
-	function uiSectionPrivacy(context) {
+	  operation.available = function (situation) {
+	    return actions(situation).length > 0;
+	  };
 
-	    var section = uiSection('preferences-third-party', context)
-	      .title(_t('preferences.privacy.title'))
-	      .disclosureContent(renderDisclosureContent);
+	  operation.disabled = function () {
+	    return false;
+	  };
 
-	    var _showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+	  operation.tooltip = function () {
+	    return _t('operations.reverse.description.' + reverseTypeID());
+	  };
 
-	    function renderDisclosureContent(selection) {
-	      // enter
-	      var privacyOptionsListEnter = selection.selectAll('.privacy-options-list')
-	        .data([0])
-	        .enter()
-	        .append('ul')
-	        .attr('class', 'layer-list privacy-options-list');
-
-	      var thirdPartyIconsEnter = privacyOptionsListEnter
-	        .append('li')
-	        .attr('class', 'privacy-third-party-icons-item')
-	        .append('label')
-	        .call(uiTooltip()
-	          .title(_t('preferences.privacy.third_party_icons.tooltip'))
-	          .placement('bottom')
-	        );
+	  operation.annotation = function () {
+	    var acts = actions();
+	    return _t('operations.reverse.annotation.' + reverseTypeID(), {
+	      n: acts.length
+	    });
+	  };
 
-	      thirdPartyIconsEnter
-	        .append('input')
-	        .attr('type', 'checkbox')
-	        .on('change', function () {
-	          event.preventDefault();
-	          _showThirdPartyIcons = (_showThirdPartyIcons === 'true') ? 'false' : 'true';
-	          corePreferences('preferences.privacy.thirdpartyicons', _showThirdPartyIcons);
-	          update();
-	        });
+	  operation.id = 'reverse';
+	  operation.keys = [_t('operations.reverse.key')];
+	  operation.title = _t('operations.reverse.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	      thirdPartyIconsEnter
-	        .append('span')
-	        .text(_t('preferences.privacy.third_party_icons.description'));
+	function operationSplit(context, selectedIDs) {
+	  var _vertexIds = selectedIDs.filter(function (id) {
+	    return context.graph().geometry(id) === 'vertex';
+	  });
 
+	  var _selectedWayIds = selectedIDs.filter(function (id) {
+	    var entity = context.graph().hasEntity(id);
+	    return entity && entity.type === 'way';
+	  });
 
-	      // Privacy Policy link
-	      selection.selectAll('.privacy-link')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'privacy-link')
-	        .append('a')
-	        .attr('target', '_blank')
-	        .call(svgIcon('#iD-icon-out-link', 'inline'))
-	        .attr('href', 'https://github.com/openstreetmap/iD/blob/release/PRIVACY.md')
-	        .append('span')
-	        .text(_t('preferences.privacy.privacy_link'));
+	  var _isAvailable = _vertexIds.length > 0 && _vertexIds.length + _selectedWayIds.length === selectedIDs.length;
 
-	      update();
+	  var _action = actionSplit(_vertexIds);
 
+	  var _ways = [];
+	  var _geometry = 'feature';
+	  var _waysAmount = 'single';
 
-	      function update() {
-	        selection.selectAll('.privacy-third-party-icons-item')
-	          .classed('active', (_showThirdPartyIcons === 'true'))
-	          .select('input')
-	          .property('checked', (_showThirdPartyIcons === 'true'));
-	      }
-	    }
+	  var _nodesAmount = _vertexIds.length === 1 ? 'single' : 'multiple';
 
-	    return section;
-	}
+	  if (_isAvailable) {
+	    if (_selectedWayIds.length) _action.limitWays(_selectedWayIds);
+	    _ways = _action.ways(context.graph());
+	    var geometries = {};
 
-	function uiPanePreferences(context) {
+	    _ways.forEach(function (way) {
+	      geometries[way.geometry(context.graph())] = true;
+	    });
 
-	  var preferencesPane = uiPane('preferences', context)
-	    .key(_t('preferences.key'))
-	    .title(_t('preferences.title'))
-	    .description(_t('preferences.description'))
-	    .iconName('fas-user-cog')
-	    .sections([
-	        uiSectionPrivacy(context)
-	    ]);
+	    if (Object.keys(geometries).length === 1) {
+	      _geometry = Object.keys(geometries)[0];
+	    }
 
-	  return preferencesPane;
-	}
+	    _waysAmount = _ways.length === 1 ? 'single' : 'multiple';
+	  }
 
-	function uiInit(context) {
-	    var _initCounter = 0;
-	    var _needWidth = {};
+	  var operation = function operation() {
+	    var difference = context.perform(_action, operation.annotation()); // select both the nodes and the ways so the mapper can immediately disconnect them if desired
 
-	    var _lastPointerType;
+	    var idsToSelect = _vertexIds.concat(difference.extantIDs().filter(function (id) {
+	      // filter out relations that may have had member additions
+	      return context.entity(id).type === 'way';
+	    }));
 
+	    context.enter(modeSelect(context, idsToSelect));
+	  };
 
-	    function render(container) {
+	  operation.relatedEntityIds = function () {
+	    return _selectedWayIds.length ? [] : _ways.map(function (way) {
+	      return way.id;
+	    });
+	  };
 
-	        container
-	            .on('click.ui', function() {
-	                // we're only concerned with the primary mouse button
-	                if (event.button !== 0) { return; }
+	  operation.available = function () {
+	    return _isAvailable;
+	  };
 
-	                if (!event.composedPath) { return; }
+	  operation.disabled = function () {
+	    var reason = _action.disabled(context.graph());
 
-	                // some targets have default click events we don't want to override
-	                var isOkayTarget = event.composedPath().some(function(node) {
-	                    // we only care about element nodes
-	                    return node.nodeType === 1 &&
-	                        // clicking <input> focuses it and/or changes a value
-	                        (node.nodeName === 'INPUT' ||
-	                        // clicking <label> affects its <input> by default
-	                        node.nodeName === 'LABEL' ||
-	                        // clicking <a> opens a hyperlink by default
-	                        node.nodeName === 'A');
-	                });
-	                if (isOkayTarget) { return; }
+	    if (reason) {
+	      return reason;
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    }
 
-	                // disable double-tap-to-zoom on touchscreens
-	                event.preventDefault();
-	            });
+	    return false;
+	  };
 
-	        var detected = utilDetect();
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    if (disable) return _t('operations.split.' + disable);
+	    return _t('operations.split.description.' + _geometry + '.' + _waysAmount + '.' + _nodesAmount + '_node');
+	  };
 
-	        // only WebKit supports gesture events
-	        if ('GestureEvent' in window &&
-	            // Listening for gesture events on iOS 13.4+ breaks double-tapping,
-	            // but we only need to do this on desktop Safari anyway. – #7694
-	            !detected.isMobileWebKit) {
+	  operation.annotation = function () {
+	    return _t('operations.split.annotation.' + _geometry, {
+	      n: _ways.length
+	    });
+	  };
 
-	            // On iOS we disable pinch-to-zoom of the UI via the `touch-action`
-	            // CSS property, but on desktop Safari we need to manually cancel the
-	            // default gesture events.
-	            container.on('gesturestart.ui gesturechange.ui gestureend.ui', function() {
-	                // disable pinch-to-zoom of the UI via multitouch trackpads on macOS Safari
-	                event.preventDefault();
-	            });
-	        }
+	  operation.icon = function () {
+	    if (_waysAmount === 'multiple') {
+	      return '#iD-operation-split-multiple';
+	    } else {
+	      return '#iD-operation-split';
+	    }
+	  };
 
-	        if ('PointerEvent' in window) {
-	            select(window)
-	                .on('pointerdown.ui pointerup.ui', function() {
-	                    var pointerType = event.pointerType || 'mouse';
-	                    if (_lastPointerType !== pointerType) {
-	                        _lastPointerType = pointerType;
-	                        container
-	                            .attr('pointer', pointerType);
-	                    }
-	                }, true);
-	        } else {
-	            _lastPointerType = 'mouse';
-	            container
-	                .attr('pointer', 'mouse');
-	        }
+	  operation.id = 'split';
+	  operation.keys = [_t('operations.split.key')];
+	  operation.title = _t('operations.split.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	        container
-	            .attr('dir', _mainLocalizer.textDirection());
+	function operationStraighten(context, selectedIDs) {
+	  var _wayIDs = selectedIDs.filter(function (id) {
+	    return id.charAt(0) === 'w';
+	  });
 
-	        // setup fullscreen keybindings (no button shown at this time)
-	        container
-	            .call(uiFullScreen(context));
+	  var _nodeIDs = selectedIDs.filter(function (id) {
+	    return id.charAt(0) === 'n';
+	  });
 
-	        var map = context.map();
-	        map.redrawEnable(false);  // don't draw until we've set zoom/lat/long
+	  var _amount = (_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple';
 
-	        map
-	            .on('hitMinZoom.ui', function() {
-	                ui.flash.text(_t('cannot_zoom'))();
-	            });
+	  var _nodes = utilGetAllNodes(selectedIDs, context.graph());
 
-	        container
-	            .append('svg')
-	            .attr('id', 'ideditor-defs')
-	            .call(svgDefs(context));
+	  var _coords = _nodes.map(function (n) {
+	    return n.loc;
+	  });
 
-	        container
-	            .append('div')
-	            .attr('class', 'sidebar')
-	            .call(ui.sidebar);
+	  var _extent = utilTotalExtent(selectedIDs, context.graph());
 
-	        var content = container
-	            .append('div')
-	            .attr('class', 'main-content active');
+	  var _action = chooseAction();
 
-	        // Top toolbar
-	        content
-	            .append('div')
-	            .attr('class', 'top-toolbar-wrap')
-	            .append('div')
-	            .attr('class', 'top-toolbar fillD')
-	            .call(uiTopToolbar(context));
+	  var _geometry;
 
-	        content
-	            .append('div')
-	            .attr('class', 'main-map')
-	            .attr('dir', 'ltr')
-	            .call(map);
+	  function chooseAction() {
+	    // straighten selected nodes
+	    if (_wayIDs.length === 0 && _nodeIDs.length > 2) {
+	      _geometry = 'point';
+	      return actionStraightenNodes(_nodeIDs, context.projection); // straighten selected ways (possibly between range of 2 selected nodes)
+	    } else if (_wayIDs.length > 0 && (_nodeIDs.length === 0 || _nodeIDs.length === 2)) {
+	      var startNodeIDs = [];
+	      var endNodeIDs = [];
 
-	        content
-	            .append('div')
-	            .attr('class', 'spinner')
-	            .call(uiSpinner(context));
+	      for (var i = 0; i < selectedIDs.length; i++) {
+	        var entity = context.entity(selectedIDs[i]);
 
-	        // Add attribution and footer
-	        var about = content
-	            .append('div')
-	            .attr('class', 'map-footer');
+	        if (entity.type === 'node') {
+	          continue;
+	        } else if (entity.type !== 'way' || entity.isClosed()) {
+	          return null; // exit early, can't straighten these
+	        }
 
-	        about
-	            .append('div')
-	            .attr('class', 'attribution-wrap')
-	            .attr('dir', 'ltr')
-	            .call(uiAttribution(context));
+	        startNodeIDs.push(entity.first());
+	        endNodeIDs.push(entity.last());
+	      } // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
 
-	        about
-	            .append('div')
-	            .attr('class', 'api-status')
-	            .call(uiStatus(context));
 
+	      startNodeIDs = startNodeIDs.filter(function (n) {
+	        return startNodeIDs.indexOf(n) === startNodeIDs.lastIndexOf(n);
+	      });
+	      endNodeIDs = endNodeIDs.filter(function (n) {
+	        return endNodeIDs.indexOf(n) === endNodeIDs.lastIndexOf(n);
+	      }); // Ensure all ways are connected (i.e. only 2 unique endpoints/startpoints)
 
-	        var footer = about
-	            .append('div')
-	            .attr('class', 'map-footer-bar fillD');
+	      if (utilArrayDifference(startNodeIDs, endNodeIDs).length + utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) return null; // Ensure path contains at least 3 unique nodes
 
-	        footer
-	            .append('div')
-	            .attr('class', 'flash-wrap footer-hide');
+	      var wayNodeIDs = utilGetAllNodes(_wayIDs, context.graph()).map(function (node) {
+	        return node.id;
+	      });
+	      if (wayNodeIDs.length <= 2) return null; // If range of 2 selected nodes is supplied, ensure nodes lie on the selected path
 
-	        var footerWrap = footer
-	            .append('div')
-	            .attr('class', 'main-footer-wrap footer-show');
+	      if (_nodeIDs.length === 2 && (wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1)) return null;
 
-	        footerWrap
-	            .append('div')
-	            .attr('class', 'scale-block')
-	            .call(uiScale(context));
+	      if (_nodeIDs.length) {
+	        // If we're only straightenting between two points, we only need that extent visible
+	        _extent = utilTotalExtent(_nodeIDs, context.graph());
+	      }
 
-	        var aboutList = footerWrap
-	            .append('div')
-	            .attr('class', 'info-block')
-	            .append('ul')
-	            .attr('class', 'map-footer-list');
-
-	        if (!context.embed()) {
-	            aboutList
-	                .call(uiAccount(context));
-	        }
-
-	        aboutList
-	            .append('li')
-	            .attr('class', 'version')
-	            .call(uiVersion(context));
-
-	        var issueLinks = aboutList
-	            .append('li');
-
-	        issueLinks
-	            .append('a')
-	            .attr('target', '_blank')
-	            .attr('href', 'https://github.com/openstreetmap/iD/issues')
-	            .call(svgIcon('#iD-icon-bug', 'light'))
-	            .call(uiTooltip().title(_t('report_a_bug')).placement('top'));
-
-	        issueLinks
-	            .append('a')
-	            .attr('target', '_blank')
-	            .attr('href', 'https://github.com/openstreetmap/iD/blob/develop/CONTRIBUTING.md#translating')
-	            .call(svgIcon('#iD-icon-translate', 'light'))
-	            .call(uiTooltip().title(_t('help_translate')).placement('top'));
-
-	        aboutList
-	            .append('li')
-	            .attr('class', 'feature-warning')
-	            .attr('tabindex', -1)
-	            .call(uiFeatureInfo(context));
-
-	        aboutList
-	            .append('li')
-	            .attr('class', 'issues-info')
-	            .attr('tabindex', -1)
-	            .call(uiIssuesInfo(context));
-
-	        var apiConnections = context.apiConnections();
-	        if (apiConnections && apiConnections.length > 1) {
-	            aboutList
-	                .append('li')
-	                .attr('class', 'source-switch')
-	                .attr('tabindex', -1)
-	                .call(uiSourceSwitch(context)
-	                    .keys(apiConnections)
-	                );
-	        }
+	      _geometry = 'line';
+	      return actionStraightenWay(selectedIDs, context.projection);
+	    }
 
-	        aboutList
-	            .append('li')
-	            .attr('class', 'user-list')
-	            .attr('tabindex', -1)
-	            .call(uiContributors(context));
+	    return null;
+	  }
 
+	  function operation() {
+	    if (!_action) return;
+	    context.perform(_action, operation.annotation());
+	    window.setTimeout(function () {
+	      context.validator().validate();
+	    }, 300); // after any transition
+	  }
 
-	        // Setup map dimensions and move map to initial center/zoom.
-	        // This should happen after .main-content and toolbars exist.
-	        ui.onResize();
-	        map.redrawEnable(true);
+	  operation.available = function () {
+	    return Boolean(_action);
+	  };
 
-	        ui.hash = behaviorHash(context);
-	        ui.hash();
-	        if (!ui.hash.hadHash) {
-	            map.centerZoom([0, 0], 2);
-	        }
+	  operation.disabled = function () {
+	    var reason = _action.disabled(context.graph());
 
+	    if (reason) {
+	      return reason;
+	    } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    }
 
-	        var overMap = content
-	            .append('div')
-	            .attr('class', 'over-map');
+	    return false;
 
-	        // Map controls
-	        var controls = overMap
-	            .append('div')
-	            .attr('class', 'map-controls');
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	        controls
-	            .append('div')
-	            .attr('class', 'map-control zoombuttons')
-	            .call(uiZoom(context));
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	        controls
-	            .append('div')
-	            .attr('class', 'map-control zoom-to-selection-control')
-	            .call(uiZoomToSelection(context));
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	        controls
-	            .append('div')
-	            .attr('class', 'map-control geolocate-control')
-	            .call(uiGeolocate(context));
+	      return false;
+	    }
+	  };
 
-	        // Add panes
-	        // This should happen after map is initialized, as some require surface()
-	        var panes = overMap
-	            .append('div')
-	            .attr('class', 'map-panes');
-
-	        var uiPanes = [
-	            uiPaneBackground(context),
-	            uiPaneMapData(context),
-	            uiPaneIssues(context),
-	            uiPanePreferences(context),
-	            uiPaneHelp(context)
-	        ];
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.straighten.' + disable + '.' + _amount) : _t('operations.straighten.description.' + _geometry + (_wayIDs.length === 1 ? '' : 's'));
+	  };
 
-	        uiPanes.forEach(function(pane) {
-	            controls
-	                .append('div')
-	                .attr('class', 'map-control map-pane-control ' + pane.id + '-control')
-	                .call(pane.renderToggleButton);
+	  operation.annotation = function () {
+	    return _t('operations.straighten.annotation.' + _geometry, {
+	      n: _wayIDs.length ? _wayIDs.length : _nodeIDs.length
+	    });
+	  };
 
-	            panes
-	                .call(pane.renderPane);
-	        });
+	  operation.id = 'straighten';
+	  operation.keys = [_t('operations.straighten.key')];
+	  operation.title = _t('operations.straighten.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	        ui.info = uiInfo(context);
+	var Operations = /*#__PURE__*/Object.freeze({
+		__proto__: null,
+		operationCircularize: operationCircularize,
+		operationContinue: operationContinue,
+		operationCopy: operationCopy,
+		operationDelete: operationDelete,
+		operationDisconnect: operationDisconnect,
+		operationDowngrade: operationDowngrade,
+		operationExtract: operationExtract,
+		operationMerge: operationMerge,
+		operationMove: operationMove,
+		operationOrthogonalize: operationOrthogonalize,
+		operationPaste: operationPaste,
+		operationReflectShort: operationReflectShort,
+		operationReflectLong: operationReflectLong,
+		operationReverse: operationReverse,
+		operationRotate: operationRotate,
+		operationSplit: operationSplit,
+		operationStraighten: operationStraighten
+	});
 
-	        // Add absolutely-positioned elements that sit on top of the map
-	        // This should happen after the map is ready (center/zoom)
-	        overMap
-	            .call(uiMapInMap(context))
-	            .call(ui.info)
-	            .call(uiNotice(context));
+	function modeSelect(context, selectedIDs) {
+	  var mode = {
+	    id: 'select',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('select');
 
+	  var _breatheBehavior = behaviorBreathe();
 
-	        overMap
-	            .append('div')
-	            .attr('class', 'photoviewer')
-	            .classed('al', true)       // 'al'=left,  'ar'=right
-	            .classed('hide', true)
-	            .call(ui.photoviewer);
+	  var _modeDragNode = modeDragNode(context);
 
+	  var _selectBehavior;
 
-	        // Bind events
-	        window.onbeforeunload = function() {
-	            return context.save();
-	        };
-	        window.onunload = function() {
-	            context.history().unlock();
-	        };
+	  var _behaviors = [];
+	  var _operations = [];
+	  var _newFeature = false;
+	  var _follow = false; // `_focusedParentWayId` is used when we visit a vertex with multiple
+	  // parents, and we want to remember which parent line we started on.
 
-	        select(window)
-	            .on('resize.editor', ui.onResize);
-
-
-	        var panPixels = 80;
-	        context.keybinding()
-	            .on('⌫', function() { event.preventDefault(); })
-	            .on([_t('sidebar.key'), '`', '²', '@'], ui.sidebar.toggle)   // #5663, #6864 - common QWERTY, AZERTY
-	            .on('←', pan([panPixels, 0]))
-	            .on('↑', pan([0, panPixels]))
-	            .on('→', pan([-panPixels, 0]))
-	            .on('↓', pan([0, -panPixels]))
-	            .on(uiCmd('⌘←'), pan([map.dimensions()[0], 0]))
-	            .on(uiCmd('⌘↑'), pan([0, map.dimensions()[1]]))
-	            .on(uiCmd('⌘→'), pan([-map.dimensions()[0], 0]))
-	            .on(uiCmd('⌘↓'), pan([0, -map.dimensions()[1]]))
-	            .on(uiCmd('⌘' + _t('background.key')), function quickSwitch() {
-	                if (event) {
-	                    event.stopImmediatePropagation();
-	                    event.preventDefault();
-	                }
-	                var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));
-	                if (previousBackground) {
-	                    var currentBackground = context.background().baseLayerSource();
-	                    corePreferences('background-last-used-toggle', currentBackground.id);
-	                    corePreferences('background-last-used', previousBackground.id);
-	                    context.background().baseLayerSource(previousBackground);
-	                }
-	            })
-	            .on(_t('area_fill.wireframe.key'), function toggleWireframe() {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                context.map().toggleWireframe();
-	            })
-	            .on(uiCmd('⌥' + _t('area_fill.wireframe.key')), function toggleOsmData() {
-	                event.preventDefault();
-	                event.stopPropagation();
-
-	                // Don't allow layer changes while drawing - #6584
-	                var mode = context.mode();
-	                if (mode && /^draw/.test(mode.id)) { return; }
-
-	                var layer = context.layers().layer('osm');
-	                if (layer) {
-	                    layer.enabled(!layer.enabled());
-	                    if (!layer.enabled()) {
-	                        context.enter(modeBrowse(context));
-	                    }
-	                }
-	            })
-	            .on(_t('map_data.highlight_edits.key'), function toggleHighlightEdited() {
-	                event.preventDefault();
-	                context.map().toggleHighlightEdited();
-	            });
+	  var _focusedParentWayId;
 
-	        context
-	            .on('enter.editor', function(entered) {
-	                container
-	                    .classed('mode-' + entered.id, true);
-	            })
-	            .on('exit.editor', function(exited) {
-	                container
-	                    .classed('mode-' + exited.id, false);
-	            });
+	  var _focusedVertexIds;
 
-	        context.enter(modeBrowse(context));
+	  function singular() {
+	    if (selectedIDs && selectedIDs.length === 1) {
+	      return context.hasEntity(selectedIDs[0]);
+	    }
+	  }
 
-	        if (!_initCounter++) {
-	            if (!ui.hash.startWalkthrough) {
-	                context.container()
-	                    .call(uiSplash(context))
-	                    .call(uiRestore(context));
-	            }
+	  function selectedEntities() {
+	    return selectedIDs.map(function (id) {
+	      return context.hasEntity(id);
+	    }).filter(Boolean);
+	  }
 
-	            context.container()
-	                .call(uiShortcuts(context));
-	        }
+	  function checkSelectedIDs() {
+	    var ids = [];
 
-	        var osm = context.connection();
-	        var auth = uiLoading(context).message(_t('loading_auth')).blocking(true);
+	    if (Array.isArray(selectedIDs)) {
+	      ids = selectedIDs.filter(function (id) {
+	        return context.hasEntity(id);
+	      });
+	    }
 
-	        if (osm && auth) {
-	            osm
-	                .on('authLoading.ui', function() {
-	                    context.container()
-	                        .call(auth);
-	                })
-	                .on('authDone.ui', function() {
-	                    auth.close();
-	                });
-	        }
+	    if (!ids.length) {
+	      context.enter(modeBrowse(context));
+	      return false;
+	    } else if (selectedIDs.length > 1 && ids.length === 1 || selectedIDs.length === 1 && ids.length > 1) {
+	      // switch between single- and multi-select UI
+	      context.enter(modeSelect(context, ids));
+	      return false;
+	    }
 
-	        _initCounter++;
+	    selectedIDs = ids;
+	    return true;
+	  } // find the parent ways for nextVertex, previousVertex, and selectParent
 
-	        if (ui.hash.startWalkthrough) {
-	            ui.hash.startWalkthrough = false;
-	            context.container().call(uiIntro(context));
-	        }
 
+	  function parentWaysIdsOfSelection(onlyCommonParents) {
+	    var graph = context.graph();
+	    var parents = [];
 
-	        function pan(d) {
-	            return function() {
-	                if (event.shiftKey) { return; }
-	                if (context.container().select('.combobox').size()) { return; }
-	                event.preventDefault();
-	                context.map().pan(d, 100);
-	            };
-	        }
+	    for (var i = 0; i < selectedIDs.length; i++) {
+	      var entity = context.hasEntity(selectedIDs[i]);
 
-	    }
+	      if (!entity || entity.geometry(graph) !== 'vertex') {
+	        return []; // selection includes some non-vertices
+	      }
 
+	      var currParents = graph.parentWays(entity).map(function (w) {
+	        return w.id;
+	      });
 
-	    var ui = {};
+	      if (!parents.length) {
+	        parents = currParents;
+	        continue;
+	      }
 
-	    var _loadPromise;
-	    // renders the iD interface into the container node
-	    ui.ensureLoaded = function () {
+	      parents = (onlyCommonParents ? utilArrayIntersection : utilArrayUnion)(parents, currParents);
 
-	        if (_loadPromise) { return _loadPromise; }
+	      if (!parents.length) {
+	        return [];
+	      }
+	    }
 
-	        return _loadPromise = Promise.all([
-	                // must have strings and presets before loading the UI
-	                _mainLocalizer.ensureLoaded(),
-	                _mainPresetIndex.ensureLoaded()
-	            ])
-	            .then(function () {
-	                if (!context.container().empty()) { render(context.container()); }
-	            })
-	            .catch(function (err) { return console.error(err); });  // eslint-disable-line
-	    };
+	    return parents;
+	  } // find the child nodes for selected ways
 
 
-	    // `ui.restart()` will destroy and rebuild the entire iD interface,
-	    // for example to switch the locale while iD is running.
-	    ui.restart = function() {
-	        context.keybinding().clear();
+	  function childNodeIdsOfSelection(onlyCommon) {
+	    var graph = context.graph();
+	    var childs = [];
 
-	        _loadPromise = null;
+	    for (var i = 0; i < selectedIDs.length; i++) {
+	      var entity = context.hasEntity(selectedIDs[i]);
 
-	        context.container().selectAll('*').remove();
+	      if (!entity || !['area', 'line'].includes(entity.geometry(graph))) {
+	        return []; // selection includes non-area/non-line
+	      }
 
-	        ui.ensureLoaded();
-	    };
+	      var currChilds = graph.childNodes(entity).map(function (node) {
+	        return node.id;
+	      });
 
-	    ui.lastPointerType = function() {
-	        return _lastPointerType;
-	    };
+	      if (!childs.length) {
+	        childs = currChilds;
+	        continue;
+	      }
 
-	    ui.flash = uiFlash(context);
+	      childs = (onlyCommon ? utilArrayIntersection : utilArrayUnion)(childs, currChilds);
 
-	    ui.sidebar = uiSidebar(context);
+	      if (!childs.length) {
+	        return [];
+	      }
+	    }
 
-	    ui.photoviewer = uiPhotoviewer(context);
+	    return childs;
+	  }
 
-	    ui.onResize = function(withPan) {
-	        var map = context.map();
+	  function checkFocusedParent() {
+	    if (_focusedParentWayId) {
+	      var parents = parentWaysIdsOfSelection(true);
+	      if (parents.indexOf(_focusedParentWayId) === -1) _focusedParentWayId = null;
+	    }
+	  }
 
-	        // Recalc dimensions of map and sidebar.. (`true` = force recalc)
-	        // This will call `getBoundingClientRect` and trigger reflow,
-	        //  but the values will be cached for later use.
-	        var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
-	        utilGetDimensions(context.container().select('.sidebar'), true);
+	  function parentWayIdForVertexNavigation() {
+	    var parentIds = parentWaysIdsOfSelection(true);
 
-	        if (withPan !== undefined) {
-	            map.redrawEnable(false);
-	            map.pan(withPan);
-	            map.redrawEnable(true);
-	        }
-	        map.dimensions(mapDimensions);
+	    if (_focusedParentWayId && parentIds.indexOf(_focusedParentWayId) !== -1) {
+	      // prefer the previously seen parent
+	      return _focusedParentWayId;
+	    }
 
-	        ui.photoviewer.onMapResize();
+	    return parentIds.length ? parentIds[0] : null;
+	  }
 
-	        // check if header or footer have overflowed
-	        ui.checkOverflow('.top-toolbar');
-	        ui.checkOverflow('.map-footer-bar');
+	  mode.selectedIDs = function (val) {
+	    if (!arguments.length) return selectedIDs;
+	    selectedIDs = val;
+	    return mode;
+	  };
 
-	        // Use outdated code so it works on Explorer
-	        var resizeWindowEvent = document.createEvent('Event');
+	  mode.zoomToSelected = function () {
+	    context.map().zoomToEase(selectedEntities());
+	  };
 
-	        resizeWindowEvent.initEvent('resizeWindow', true, true);
+	  mode.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return mode;
+	  };
 
-	        document.dispatchEvent(resizeWindowEvent);
-	    };
+	  mode.selectBehavior = function (val) {
+	    if (!arguments.length) return _selectBehavior;
+	    _selectBehavior = val;
+	    return mode;
+	  };
 
+	  mode.follow = function (val) {
+	    if (!arguments.length) return _follow;
+	    _follow = val;
+	    return mode;
+	  };
 
-	    // Call checkOverflow when resizing or whenever the contents change.
-	    ui.checkOverflow = function(selector, reset) {
-	        if (reset) {
-	            delete _needWidth[selector];
-	        }
+	  function loadOperations() {
+	    _operations.forEach(function (operation) {
+	      if (operation.behavior) {
+	        context.uninstall(operation.behavior);
+	      }
+	    });
 
-	        var element = select(selector);
-	        var scrollWidth = element.property('scrollWidth');
-	        var clientWidth = element.property('clientWidth');
-	        var needed = _needWidth[selector] || scrollWidth;
+	    _operations = Object.values(Operations).map(function (o) {
+	      return o(context, selectedIDs);
+	    }).filter(function (o) {
+	      return o.id !== 'delete' && o.id !== 'downgrade' && o.id !== 'copy';
+	    }).concat([// group copy/downgrade/delete operation together at the end of the list
+	    operationCopy(context, selectedIDs), operationDowngrade(context, selectedIDs), operationDelete(context, selectedIDs)]).filter(function (operation) {
+	      return operation.available();
+	    });
 
-	        if (scrollWidth > clientWidth) {    // overflow happening
-	            element.classed('narrow', true);
-	            if (!_needWidth[selector]) {
-	                _needWidth[selector] = scrollWidth;
-	            }
+	    _operations.forEach(function (operation) {
+	      if (operation.behavior) {
+	        context.install(operation.behavior);
+	      }
+	    }); // remove any displayed menu
 
-	        } else if (scrollWidth >= needed) {
-	            element.classed('narrow', false);
-	        }
-	    };
 
-	    ui.togglePanes = function(showPane) {
-	        var shownPanes = context.container().selectAll('.map-pane.shown');
+	    context.ui().closeEditMenu();
+	  }
 
-	        var side = _mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left';
+	  mode.operations = function () {
+	    return _operations;
+	  };
 
-	        shownPanes
-	            .classed('shown', false);
+	  mode.enter = function () {
+	    if (!checkSelectedIDs()) return;
+	    context.features().forceVisible(selectedIDs);
 
-	        context.container().selectAll('.map-pane-control button')
-	            .classed('active', false);
+	    _modeDragNode.restoreSelectedIDs(selectedIDs);
 
-	        if (showPane) {
-	            shownPanes
-	                .style('display', 'none')
-	                .style(side, '-500px');
+	    loadOperations();
 
-	            context.container().selectAll('.' + showPane.attr('pane') + '-control button')
-	                .classed('active', true);
+	    if (!_behaviors.length) {
+	      if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
+	      _behaviors = [behaviorPaste(context), _breatheBehavior, behaviorHover(context).on('hover', context.ui().sidebar.hoverModeSelect), _selectBehavior, behaviorLasso(context), _modeDragNode.behavior, modeDragNote(context).behavior];
+	    }
 
-	            showPane
-	                .classed('shown', true)
-	                .style('display', 'block');
-	            if (shownPanes.empty()) {
-	                showPane
-	                    .style('display', 'block')
-	                    .style(side, '-500px')
-	                    .transition()
-	                    .duration(200)
-	                    .style(side, '0px');
-	            } else {
-	                showPane
-	                    .style(side, '0px');
-	            }
-	        } else {
-	            shownPanes
-	                .style('display', 'block')
-	                .style(side, '0px')
-	                .transition()
-	                .duration(200)
-	                .style(side, '-500px')
-	                .on('end', function() {
-	                    select(this).style('display', 'none');
-	                });
-	        }
-	    };
+	    _behaviors.forEach(context.install);
 
+	    keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on(['[', 'pgup'], previousVertex).on([']', 'pgdown'], nextVertex).on(['{', uiCmd('⌘['), 'home'], firstVertex).on(['}', uiCmd('⌘]'), 'end'], lastVertex).on(uiCmd('⇧←'), nudgeSelection([-10, 0])).on(uiCmd('⇧↑'), nudgeSelection([0, -10])).on(uiCmd('⇧→'), nudgeSelection([10, 0])).on(uiCmd('⇧↓'), nudgeSelection([0, 10])).on(uiCmd('⇧⌥←'), nudgeSelection([-100, 0])).on(uiCmd('⇧⌥↑'), nudgeSelection([0, -100])).on(uiCmd('⇧⌥→'), nudgeSelection([100, 0])).on(uiCmd('⇧⌥↓'), nudgeSelection([0, 100])).on(utilKeybinding.plusKeys.map(function (key) {
+	      return uiCmd('⇧' + key);
+	    }), scaleSelection(1.05)).on(utilKeybinding.plusKeys.map(function (key) {
+	      return uiCmd('⇧⌥' + key);
+	    }), scaleSelection(Math.pow(1.05, 5))).on(utilKeybinding.minusKeys.map(function (key) {
+	      return uiCmd('⇧' + key);
+	    }), scaleSelection(1 / 1.05)).on(utilKeybinding.minusKeys.map(function (key) {
+	      return uiCmd('⇧⌥' + key);
+	    }), scaleSelection(1 / Math.pow(1.05, 5))).on(['\\', 'pause'], focusNextParent).on(uiCmd('⌘↑'), selectParent).on(uiCmd('⌘↓'), selectChild).on('⎋', esc, true);
+	    select(document).call(keybinding);
+	    context.ui().sidebar.select(selectedIDs, _newFeature);
+	    context.history().on('change.select', function () {
+	      loadOperations(); // reselect after change in case relation members were removed or added
 
-	    var _editMenu = uiEditMenu(context);
+	      selectElements();
+	    }).on('undone.select', checkSelectedIDs).on('redone.select', checkSelectedIDs);
+	    context.map().on('drawn.select', selectElements).on('crossEditableZoom.select', function () {
+	      selectElements();
 
-	    ui.editMenu = function() {
-	        return _editMenu;
-	    };
+	      _breatheBehavior.restartIfNeeded(context.surface());
+	    });
+	    context.map().doubleUpHandler().on('doubleUp.modeSelect', didDoubleUp);
+	    selectElements();
 
-	    ui.showEditMenu = function(anchorPoint, triggerType, operations) {
+	    if (_follow) {
+	      var extent = geoExtent();
+	      var graph = context.graph();
+	      selectedIDs.forEach(function (id) {
+	        var entity = context.entity(id);
 
-	        // remove any displayed menu
-	        ui.closeEditMenu();
+	        extent._extend(entity.extent(graph));
+	      });
+	      var loc = extent.center();
+	      context.map().centerEase(loc); // we could enter the mode multiple times, so reset follow for next time
 
-	        if (!operations && context.mode().operations) { operations = context.mode().operations(); }
-	        if (!operations || !operations.length) { return; }
+	      _follow = false;
+	    }
 
-	        // disable menu if in wide selection, for example
-	        if (!context.map().editableDataEnabled()) { return; }
+	    function nudgeSelection(delta) {
+	      return function () {
+	        // prevent nudging during low zoom selection
+	        if (!context.map().withinEditableZoom()) return;
+	        var moveOp = operationMove(context, selectedIDs);
 
-	        var surfaceNode = context.surface().node();
-	        if (surfaceNode.focus) {   // FF doesn't support it
-	            // focus the surface or else clicking off the menu may not trigger modeBrowse
-	            surfaceNode.focus();
+	        if (moveOp.disabled()) {
+	          context.ui().flash.duration(4000).iconName('#iD-operation-' + moveOp.id).iconClass('operation disabled').label(moveOp.tooltip)();
+	        } else {
+	          context.perform(actionMove(selectedIDs, delta, context.projection), moveOp.annotation());
+	          context.validator().validate();
 	        }
+	      };
+	    }
 
-	        operations.forEach(function(operation) {
-	            if (operation.point) { operation.point(anchorPoint); }
-	        });
+	    function scaleSelection(factor) {
+	      return function () {
+	        // prevent scaling during low zoom selection
+	        if (!context.map().withinEditableZoom()) return;
+	        var nodes = utilGetAllNodes(selectedIDs, context.graph());
+	        var isUp = factor > 1; // can only scale if multiple nodes are selected
+
+	        if (nodes.length <= 1) return;
+	        var extent = utilTotalExtent(selectedIDs, context.graph()); // These disabled checks would normally be handled by an operation
+	        // object, but we don't want an actual scale operation at this point.
+
+	        function scalingDisabled() {
+	          if (tooSmall()) {
+	            return 'too_small';
+	          } else if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	            return 'too_large';
+	          } else if (someMissing() || selectedIDs.some(incompleteRelation)) {
+	            return 'not_downloaded';
+	          } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	            return 'connected_to_hidden';
+	          }
 
-	        _editMenu
-	            .anchorLoc(anchorPoint)
-	            .triggerType(triggerType)
-	            .operations(operations);
+	          return false;
 
-	        // render the menu
-	        context.map().supersurface.call(_editMenu);
-	    };
+	          function tooSmall() {
+	            if (isUp) return false;
+	            var dLon = Math.abs(extent[1][0] - extent[0][0]);
+	            var dLat = Math.abs(extent[1][1] - extent[0][1]);
+	            return dLon < geoMetersToLon(1, extent[1][1]) && dLat < geoMetersToLat(1);
+	          }
 
-	    ui.closeEditMenu = function() {
-	        // remove any existing menu no matter how it was added
-	        context.map().supersurface
-	            .select('.edit-menu').remove();
-	    };
+	          function someMissing() {
+	            if (context.inIntro()) return false;
+	            var osm = context.connection();
 
+	            if (osm) {
+	              var missing = nodes.filter(function (n) {
+	                return !osm.isDataLoaded(n.loc);
+	              });
 
-	    var _saveLoading = select(null);
+	              if (missing.length) {
+	                missing.forEach(function (loc) {
+	                  context.loadTileAtLoc(loc);
+	                });
+	                return true;
+	              }
+	            }
 
-	    context.uploader()
-	        .on('saveStarted.ui', function() {
-	            _saveLoading = uiLoading(context)
-	                .message(_t('save.uploading'))
-	                .blocking(true);
-	            context.container().call(_saveLoading);  // block input during upload
-	        })
-	        .on('saveEnded.ui', function() {
-	            _saveLoading.close();
-	            _saveLoading = select(null);
-	        });
+	            return false;
+	          }
 
-	    return ui;
-	}
+	          function incompleteRelation(id) {
+	            var entity = context.entity(id);
+	            return entity.type === 'relation' && !entity.isComplete(context.graph());
+	          }
+	        }
 
-	function coreContext() {
-	  var this$1 = this;
+	        var disabled = scalingDisabled();
 
-	  var dispatch$1 = dispatch('enter', 'exit', 'change');
-	  var context = utilRebind({}, dispatch$1, 'on');
-	  var _deferred = new Set();
+	        if (disabled) {
+	          var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	          context.ui().flash.duration(4000).iconName('#iD-icon-no').iconClass('operation disabled').label(_t.html('operations.scale.' + disabled + '.' + multi))();
+	        } else {
+	          var pivot = context.projection(extent.center());
+	          var annotation = _t('operations.scale.annotation.' + (isUp ? 'up' : 'down') + '.feature', {
+	            n: selectedIDs.length
+	          });
+	          context.perform(actionScale(selectedIDs, pivot, factor, context.projection), annotation);
+	          context.validator().validate();
+	        }
+	      };
+	    }
 
-	  context.version = '2.18.3';
-	  context.privacyVersion = '20200407';
+	    function didDoubleUp(d3_event, loc) {
+	      if (!context.map().withinEditableZoom()) return;
+	      var target = select(d3_event.target);
+	      var datum = target.datum();
+	      var entity = datum && datum.properties && datum.properties.entity;
+	      if (!entity) return;
+
+	      if (entity instanceof osmWay && target.classed('target')) {
+	        var choice = geoChooseEdge(context.graph().childNodes(entity), loc, context.projection);
+	        var prev = entity.nodes[choice.index - 1];
+	        var next = entity.nodes[choice.index];
+	        context.perform(actionAddMidpoint({
+	          loc: choice.loc,
+	          edge: [prev, next]
+	        }, osmNode()), _t('operations.add.annotation.vertex'));
+	        context.validator().validate();
+	      } else if (entity.type === 'midpoint') {
+	        context.perform(actionAddMidpoint({
+	          loc: entity.loc,
+	          edge: entity.edge
+	        }, osmNode()), _t('operations.add.annotation.vertex'));
+	        context.validator().validate();
+	      }
+	    }
 
-	  // iD will alter the hash so cache the parameters intended to setup the session
-	  context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
+	    function selectElements() {
+	      if (!checkSelectedIDs()) return;
+	      var surface = context.surface();
+	      surface.selectAll('.selected-member').classed('selected-member', false);
+	      surface.selectAll('.selected').classed('selected', false);
+	      surface.selectAll('.related').classed('related', false); // reload `_focusedParentWayId` based on the current selection
 
-	  context.isFirstSession = !corePreferences('sawSplash') && !corePreferences('sawPrivacyVersion');
+	      checkFocusedParent();
 
+	      if (_focusedParentWayId) {
+	        surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
+	      }
 
-	  /* Changeset */
-	  // An osmChangeset object. Not loaded until needed.
-	  context.changeset = null;
+	      if (context.map().withinEditableZoom()) {
+	        // Apply selection styling if not in wide selection
+	        surface.selectAll(utilDeepMemberSelector(selectedIDs, context.graph(), true
+	        /* skipMultipolgonMembers */
+	        )).classed('selected-member', true);
+	        surface.selectAll(utilEntityOrDeepMemberSelector(selectedIDs, context.graph())).classed('selected', true);
+	      }
+	    }
 
-	  var _defaultChangesetComment = context.initialHashParams.comment;
-	  var _defaultChangesetSource = context.initialHashParams.source;
-	  var _defaultChangesetHashtags = context.initialHashParams.hashtags;
-	  context.defaultChangesetComment = function(val) {
-	    if (!arguments.length) { return _defaultChangesetComment; }
-	    _defaultChangesetComment = val;
-	    return context;
-	  };
-	  context.defaultChangesetSource = function(val) {
-	    if (!arguments.length) { return _defaultChangesetSource; }
-	    _defaultChangesetSource = val;
-	    return context;
-	  };
-	  context.defaultChangesetHashtags = function(val) {
-	    if (!arguments.length) { return _defaultChangesetHashtags; }
-	    _defaultChangesetHashtags = val;
-	    return context;
-	  };
+	    function esc() {
+	      if (context.container().select('.combobox').size()) return;
+	      context.enter(modeBrowse(context));
+	    }
 
-	  /* Document title */
-	  /* (typically shown as the label for the browser window/tab) */
+	    function firstVertex(d3_event) {
+	      d3_event.preventDefault();
+	      var entity = singular();
+	      var parentId = parentWayIdForVertexNavigation();
+	      var way;
 
-	  // If true, iD will update the title based on what the user is doing
-	  var _setsDocumentTitle = true;
-	  context.setsDocumentTitle = function(val) {
-	    if (!arguments.length) { return _setsDocumentTitle; }
-	    _setsDocumentTitle = val;
-	    return context;
-	  };
-	  // The part of the title that is always the same
-	  var _documentTitleBase = document.title;
-	  context.documentTitleBase = function(val) {
-	    if (!arguments.length) { return _documentTitleBase; }
-	    _documentTitleBase = val;
-	    return context;
-	  };
+	      if (entity && entity.type === 'way') {
+	        way = entity;
+	      } else if (parentId) {
+	        way = context.entity(parentId);
+	      }
 
+	      _focusedParentWayId = way && way.id;
 
-	  /* User interface and keybinding */
-	  var _ui;
-	  context.ui = function () { return _ui; };
-	  context.lastPointerType = function () { return _ui.lastPointerType(); };
+	      if (way) {
+	        context.enter(mode.selectedIDs([way.first()]).follow(true));
+	      }
+	    }
 
-	  var _keybinding = utilKeybinding('context');
-	  context.keybinding = function () { return _keybinding; };
-	  select(document).call(_keybinding);
+	    function lastVertex(d3_event) {
+	      d3_event.preventDefault();
+	      var entity = singular();
+	      var parentId = parentWayIdForVertexNavigation();
+	      var way;
 
+	      if (entity && entity.type === 'way') {
+	        way = entity;
+	      } else if (parentId) {
+	        way = context.entity(parentId);
+	      }
 
-	  /* Straight accessors. Avoid using these if you can. */
-	  // Instantiate the connection here because it doesn't require passing in
-	  // `context` and it's needed for pre-init calls like `preauth`
-	  var _connection = services.osm;
-	  var _history;
-	  var _validator;
-	  var _uploader;
-	  context.connection = function () { return _connection; };
-	  context.history = function () { return _history; };
-	  context.validator = function () { return _validator; };
-	  context.uploader = function () { return _uploader; };
+	      _focusedParentWayId = way && way.id;
 
-	  /* Connection */
-	  context.preauth = function (options) {
-	    if (_connection) {
-	      _connection.switch(options);
+	      if (way) {
+	        context.enter(mode.selectedIDs([way.last()]).follow(true));
+	      }
 	    }
-	    return context;
-	  };
-
-	  /* connection options for source switcher (optional) */
-	  var _apiConnections;
-	  context.apiConnections = function(val) {
-	    if (!arguments.length) { return _apiConnections; }
-	    _apiConnections = val;
-	    return context;
-	  };
 
+	    function previousVertex(d3_event) {
+	      d3_event.preventDefault();
+	      var parentId = parentWayIdForVertexNavigation();
+	      _focusedParentWayId = parentId;
+	      if (!parentId) return;
+	      var way = context.entity(parentId);
+	      var length = way.nodes.length;
+	      var curr = way.nodes.indexOf(selectedIDs[0]);
+	      var index = -1;
+
+	      if (curr > 0) {
+	        index = curr - 1;
+	      } else if (way.isClosed()) {
+	        index = length - 2;
+	      }
 
-	  // A string or array or locale codes to prefer over the browser's settings
-	  context.locale = function(locale) {
-	    if (!arguments.length) { return _mainLocalizer.localeCode(); }
-	    _mainLocalizer.preferredLocaleCodes(locale);
-	    return context;
-	  };
+	      if (index !== -1) {
+	        context.enter(mode.selectedIDs([way.nodes[index]]).follow(true));
+	      }
+	    }
 
+	    function nextVertex(d3_event) {
+	      d3_event.preventDefault();
+	      var parentId = parentWayIdForVertexNavigation();
+	      _focusedParentWayId = parentId;
+	      if (!parentId) return;
+	      var way = context.entity(parentId);
+	      var length = way.nodes.length;
+	      var curr = way.nodes.indexOf(selectedIDs[0]);
+	      var index = -1;
+
+	      if (curr < length - 1) {
+	        index = curr + 1;
+	      } else if (way.isClosed()) {
+	        index = 0;
+	      }
 
-	  function afterLoad(cid, callback) {
-	    return function (err, result) {
-	      if (err) {
-	        // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
-	        if (err.status === 400 || err.status === 401 || err.status === 403) {
-	          if (_connection) {
-	            _connection.logout();
-	          }
-	        }
-	        if (typeof callback === 'function') {
-	          callback(err);
-	        }
-	        return;
+	      if (index !== -1) {
+	        context.enter(mode.selectedIDs([way.nodes[index]]).follow(true));
+	      }
+	    }
 
-	      } else if (_connection && _connection.getConnectionId() !== cid) {
-	        if (typeof callback === 'function') {
-	          callback({ message: 'Connection Switched', status: -1 });
-	        }
-	        return;
+	    function focusNextParent(d3_event) {
+	      d3_event.preventDefault();
+	      var parents = parentWaysIdsOfSelection(true);
+	      if (!parents || parents.length < 2) return;
+	      var index = parents.indexOf(_focusedParentWayId);
 
+	      if (index < 0 || index > parents.length - 2) {
+	        _focusedParentWayId = parents[0];
 	      } else {
-	        _history.merge(result.data, result.extent);
-	        if (typeof callback === 'function') {
-	          callback(err, result);
-	        }
-	        return;
+	        _focusedParentWayId = parents[index + 1];
 	      }
-	    };
-	  }
 
+	      var surface = context.surface();
+	      surface.selectAll('.related').classed('related', false);
 
-	  context.loadTiles = function (projection, callback) {
-	    var handle = window.requestIdleCallback(function () {
-	      _deferred.delete(handle);
-	      if (_connection && context.editableDataEnabled()) {
-	        var cid = _connection.getConnectionId();
-	        _connection.loadTiles(projection, afterLoad(cid, callback));
+	      if (_focusedParentWayId) {
+	        surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
 	      }
-	    });
-	    _deferred.add(handle);
-	  };
+	    }
 
-	  context.loadTileAtLoc = function (loc, callback) {
-	    var handle = window.requestIdleCallback(function () {
-	      _deferred.delete(handle);
-	      if (_connection && context.editableDataEnabled()) {
-	        var cid = _connection.getConnectionId();
-	        _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
-	      }
-	    });
-	    _deferred.add(handle);
-	  };
+	    function selectParent(d3_event) {
+	      d3_event.preventDefault();
+	      var currentSelectedIds = mode.selectedIDs();
+	      var parentIds = _focusedParentWayId ? [_focusedParentWayId] : parentWaysIdsOfSelection(false);
+	      if (!parentIds.length) return;
+	      context.enter(mode.selectedIDs(parentIds)); // set this after re-entering the selection since we normally want it cleared on exit
 
-	  context.loadEntity = function (entityID, callback) {
-	    if (_connection) {
-	      var cid = _connection.getConnectionId();
-	      _connection.loadEntity(entityID, afterLoad(cid, callback));
+	      _focusedVertexIds = currentSelectedIds;
 	    }
-	  };
 
-	  context.zoomToEntity = function (entityID, zoomTo) {
-	    if (zoomTo !== false) {
-	      context.loadEntity(entityID, function (err, result) {
-	        if (err) { return; }
-	        var entity = result.data.find(function (e) { return e.id === entityID; });
-	        if (entity) {
-	          _map.zoomTo(entity);
-	        }
-	      });
+	    function selectChild(d3_event) {
+	      d3_event.preventDefault();
+	      var currentSelectedIds = mode.selectedIDs();
+	      var childIds = _focusedVertexIds ? _focusedVertexIds.filter(function (id) {
+	        return context.hasEntity(id);
+	      }) : childNodeIdsOfSelection(true);
+	      if (!childIds || !childIds.length) return;
+	      if (currentSelectedIds.length === 1) _focusedParentWayId = currentSelectedIds[0];
+	      context.enter(mode.selectedIDs(childIds));
 	    }
+	  };
 
-	    _map.on('drawn.zoomToEntity', function () {
-	      if (!context.hasEntity(entityID)) { return; }
-	      _map.on('drawn.zoomToEntity', null);
-	      context.on('enter.zoomToEntity', null);
-	      context.enter(modeSelect(context, [entityID]));
-	    });
+	  mode.exit = function () {
+	    // we could enter the mode multiple times but it's only new the first time
+	    _newFeature = false;
+	    _focusedVertexIds = null;
 
-	    context.on('enter.zoomToEntity', function () {
-	      if (_mode.id !== 'browse') {
-	        _map.on('drawn.zoomToEntity', null);
-	        context.on('enter.zoomToEntity', null);
+	    _operations.forEach(function (operation) {
+	      if (operation.behavior) {
+	        context.uninstall(operation.behavior);
 	      }
 	    });
-	  };
 
-	  var _minEditableZoom = 16;
-	  context.minEditableZoom = function(val) {
-	    if (!arguments.length) { return _minEditableZoom; }
-	    _minEditableZoom = val;
-	    if (_connection) {
-	      _connection.tileZoom(val);
-	    }
-	    return context;
-	  };
+	    _operations = [];
 
-	  // String length limits in Unicode characters, not JavaScript UTF-16 code units
-	  context.maxCharsForTagKey = function () { return 255; };
-	  context.maxCharsForTagValue = function () { return 255; };
-	  context.maxCharsForRelationRole = function () { return 255; };
+	    _behaviors.forEach(context.uninstall);
 
-	  function cleanOsmString(val, maxChars) {
-	    // be lenient with input
-	    if (val === undefined || val === null) {
-	      val = '';
-	    } else {
-	      val = val.toString();
+	    select(document).call(keybinding.unbind);
+	    context.ui().closeEditMenu();
+	    context.history().on('change.select', null).on('undone.select', null).on('redone.select', null);
+	    var surface = context.surface();
+	    surface.selectAll('.selected-member').classed('selected-member', false);
+	    surface.selectAll('.selected').classed('selected', false);
+	    surface.selectAll('.highlighted').classed('highlighted', false);
+	    surface.selectAll('.related').classed('related', false);
+	    context.map().on('drawn.select', null);
+	    context.ui().sidebar.hide();
+	    context.features().forceVisible([]);
+	    var entity = singular();
+
+	    if (_newFeature && entity && entity.type === 'relation' && // no tags
+	    Object.keys(entity.tags).length === 0 && // no parent relations
+	    context.graph().parentRelations(entity).length === 0 && ( // no members or one member with no role
+	    entity.members.length === 0 || entity.members.length === 1 && !entity.members[0].role)) {
+	      // the user added this relation but didn't edit it at all, so just delete it
+	      var deleteAction = actionDeleteRelation(entity.id, true
+	      /* don't delete untagged members */
+	      );
+	      context.perform(deleteAction, _t('operations.delete.annotation.relation'));
+	      context.validator().validate();
 	    }
+	  };
 
-	    // remove whitespace
-	    val = val.trim();
-
-	    // use the canonical form of the string
-	    if (val.normalize) { val = val.normalize('NFC'); }
-
-	    // trim to the number of allowed characters
-	    return utilUnicodeCharsTruncated(val, maxChars);
-	  }
-	  context.cleanTagKey = function (val) { return cleanOsmString(val, context.maxCharsForTagKey()); };
-	  context.cleanTagValue = function (val) { return cleanOsmString(val, context.maxCharsForTagValue()); };
-	  context.cleanRelationRole = function (val) { return cleanOsmString(val, context.maxCharsForRelationRole()); };
+	  return mode;
+	}
 
+	function behaviorLasso(context) {
+	  // use pointer events on supported platforms; fallback to mouse events
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	  /* History */
-	  var _inIntro = false;
-	  context.inIntro = function(val) {
-	    if (!arguments.length) { return _inIntro; }
-	    _inIntro = val;
-	    return context;
-	  };
+	  var behavior = function behavior(selection) {
+	    var lasso;
 
-	  // Immediately save the user's history to localstorage, if possible
-	  // This is called someteimes, but also on the `window.onbeforeunload` handler
-	  context.save = function () {
-	    // no history save, no message onbeforeunload
-	    if (_inIntro || context.container().select('.modal').size()) { return; }
+	    function pointerdown(d3_event) {
+	      var button = 0; // left
 
-	    var canSave;
-	    if (_mode && _mode.id === 'save') {
-	      canSave = false;
+	      if (d3_event.button === button && d3_event.shiftKey === true) {
+	        lasso = null;
+	        select(window).on(_pointerPrefix + 'move.lasso', pointermove).on(_pointerPrefix + 'up.lasso', pointerup);
+	        d3_event.stopPropagation();
+	      }
+	    }
 
-	      // Attempt to prevent user from creating duplicate changes - see #5200
-	      if (services.osm && services.osm.isChangesetInflight()) {
-	        _history.clearSaved();
-	        return;
+	    function pointermove() {
+	      if (!lasso) {
+	        lasso = uiLasso(context);
+	        context.surface().call(lasso);
 	      }
 
-	    } else {
-	      canSave = context.selectedIDs().every(function (id) {
-	        var entity = context.hasEntity(id);
-	        return entity && !entity.isDegenerate();
-	      });
+	      lasso.p(context.map().mouse());
 	    }
 
-	    if (canSave) {
-	      _history.save();
+	    function normalize(a, b) {
+	      return [[Math.min(a[0], b[0]), Math.min(a[1], b[1])], [Math.max(a[0], b[0]), Math.max(a[1], b[1])]];
 	    }
-	    if (_history.hasChanges()) {
-	      return _t('save.unsaved_changes');
-	    }
-	  };
 
-	  // Debounce save, since it's a synchronous localStorage write,
-	  // and history changes can happen frequently (e.g. when dragging).
-	  context.debouncedSave = debounce(context.save, 350);
+	    function lassoed() {
+	      if (!lasso) return [];
+	      var graph = context.graph();
+	      var limitToNodes;
 
-	  function withDebouncedSave(fn) {
-	    return function() {
-	      var result = fn.apply(_history, arguments);
-	      context.debouncedSave();
-	      return result;
-	    };
-	  }
+	      if (context.map().editableDataEnabled(true
+	      /* skipZoomCheck */
+	      ) && context.map().isInWideSelection()) {
+	        // only select from the visible nodes
+	        limitToNodes = new Set(utilGetAllNodes(context.selectedIDs(), graph));
+	      } else if (!context.map().editableDataEnabled()) {
+	        return [];
+	      }
 
+	      var bounds = lasso.extent().map(context.projection.invert);
+	      var extent = geoExtent(normalize(bounds[0], bounds[1]));
+	      var intersects = context.history().intersects(extent).filter(function (entity) {
+	        return entity.type === 'node' && (!limitToNodes || limitToNodes.has(entity)) && geoPointInPolygon(context.projection(entity.loc), lasso.coordinates) && !context.features().isHidden(entity, graph, entity.geometry(graph));
+	      }); // sort the lassoed nodes as best we can
 
-	  /* Graph */
-	  context.hasEntity = function (id) { return _history.graph().hasEntity(id); };
-	  context.entity = function (id) { return _history.graph().entity(id); };
+	      intersects.sort(function (node1, node2) {
+	        var parents1 = graph.parentWays(node1);
+	        var parents2 = graph.parentWays(node2);
 
+	        if (parents1.length && parents2.length) {
+	          // both nodes are vertices
+	          var sharedParents = utilArrayIntersection(parents1, parents2);
 
-	  /* Modes */
-	  var _mode;
-	  context.mode = function () { return _mode; };
-	  context.enter = function (newMode) {
-	    if (_mode) {
-	      _mode.exit();
-	      dispatch$1.call('exit', this$1, _mode);
+	          if (sharedParents.length) {
+	            var sharedParentNodes = sharedParents[0].nodes; // vertices are members of the same way; sort them in their listed order
+
+	            return sharedParentNodes.indexOf(node1.id) - sharedParentNodes.indexOf(node2.id);
+	          } else {
+	            // vertices do not share a way; group them by their respective parent ways
+	            return parseFloat(parents1[0].id.slice(1)) - parseFloat(parents2[0].id.slice(1));
+	          }
+	        } else if (parents1.length || parents2.length) {
+	          // only one node is a vertex; sort standalone points before vertices
+	          return parents1.length - parents2.length;
+	        } // both nodes are standalone points; sort left to right
+
+
+	        return node1.loc[0] - node2.loc[0];
+	      });
+	      return intersects.map(function (entity) {
+	        return entity.id;
+	      });
 	    }
 
-	    _mode = newMode;
-	    _mode.enter();
-	    dispatch$1.call('enter', this$1, _mode);
-	  };
+	    function pointerup() {
+	      select(window).on(_pointerPrefix + 'move.lasso', null).on(_pointerPrefix + 'up.lasso', null);
+	      if (!lasso) return;
+	      var ids = lassoed();
+	      lasso.close();
 
-	  context.selectedIDs = function () { return (_mode && _mode.selectedIDs && _mode.selectedIDs()) || []; };
-	  context.activeID = function () { return _mode && _mode.activeID && _mode.activeID(); };
+	      if (ids.length) {
+	        context.enter(modeSelect(context, ids));
+	      }
+	    }
 
-	  var _selectedNoteID;
-	  context.selectedNoteID = function(noteID) {
-	    if (!arguments.length) { return _selectedNoteID; }
-	    _selectedNoteID = noteID;
-	    return context;
+	    selection.on(_pointerPrefix + 'down.lasso', pointerdown);
 	  };
 
-	  // NOTE: Don't change the name of this until UI v3 is merged
-	  var _selectedErrorID;
-	  context.selectedErrorID = function(errorID) {
-	    if (!arguments.length) { return _selectedErrorID; }
-	    _selectedErrorID = errorID;
-	    return context;
+	  behavior.off = function (selection) {
+	    selection.on(_pointerPrefix + 'down.lasso', null);
 	  };
 
+	  return behavior;
+	}
 
-	  /* Behaviors */
-	  context.install = function (behavior) { return context.surface().call(behavior); };
-	  context.uninstall = function (behavior) { return context.surface().call(behavior.off); };
+	function modeBrowse(context) {
+	  var mode = {
+	    button: 'browse',
+	    id: 'browse',
+	    title: _t('modes.browse.title'),
+	    description: _t('modes.browse.description')
+	  };
+	  var sidebar;
 
+	  var _selectBehavior;
 
-	  /* Copy/Paste */
-	  var _copyGraph;
-	  context.copyGraph = function () { return _copyGraph; };
+	  var _behaviors = [];
 
-	  var _copyIDs = [];
-	  context.copyIDs = function(val) {
-	    if (!arguments.length) { return _copyIDs; }
-	    _copyIDs = val;
-	    _copyGraph = _history.graph();
-	    return context;
+	  mode.selectBehavior = function (val) {
+	    if (!arguments.length) return _selectBehavior;
+	    _selectBehavior = val;
+	    return mode;
 	  };
 
-	  var _copyLonLat;
-	  context.copyLonLat = function(val) {
-	    if (!arguments.length) { return _copyLonLat; }
-	    _copyLonLat = val;
-	    return context;
-	  };
+	  mode.enter = function () {
+	    if (!_behaviors.length) {
+	      if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
+	      _behaviors = [behaviorPaste(context), behaviorHover(context).on('hover', context.ui().sidebar.hover), _selectBehavior, behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+	    }
 
+	    _behaviors.forEach(context.install); // Get focus on the body.
 
-	  /* Background */
-	  var _background;
-	  context.background = function () { return _background; };
 
+	    if (document.activeElement && document.activeElement.blur) {
+	      document.activeElement.blur();
+	    }
 
-	  /* Features */
-	  var _features;
-	  context.features = function () { return _features; };
-	  context.hasHiddenConnections = function (id) {
-	    var graph = _history.graph();
-	    var entity = graph.entity(id);
-	    return _features.hasHiddenConnections(entity, graph);
+	    if (sidebar) {
+	      context.ui().sidebar.show(sidebar);
+	    } else {
+	      context.ui().sidebar.select(null);
+	    }
 	  };
 
+	  mode.exit = function () {
+	    context.ui().sidebar.hover.cancel();
 
-	  /* Photos */
-	  var _photos;
-	  context.photos = function () { return _photos; };
-
+	    _behaviors.forEach(context.uninstall);
 
-	  /* Map */
-	  var _map;
-	  context.map = function () { return _map; };
-	  context.layers = function () { return _map.layers(); };
-	  context.surface = function () { return _map.surface; };
-	  context.editableDataEnabled = function () { return _map.editableDataEnabled(); };
-	  context.surfaceRect = function () { return _map.surface.node().getBoundingClientRect(); };
-	  context.editable = function () {
-	    // don't allow editing during save
-	    var mode = context.mode();
-	    if (!mode || mode.id === 'save') { return false; }
-	    return _map.editableDataEnabled();
+	    if (sidebar) {
+	      context.ui().sidebar.hide();
+	    }
 	  };
 
-
-	  /* Debug */
-	  var _debugFlags = {
-	    tile: false,        // tile boundaries
-	    collision: false,   // label collision bounding boxes
-	    imagery: false,     // imagery bounding polygons
-	    target: false,      // touch targets
-	    downloaded: false   // downloaded data from osm
-	  };
-	  context.debugFlags = function () { return _debugFlags; };
-	  context.getDebug = function (flag) { return flag && _debugFlags[flag]; };
-	  context.setDebug = function(flag, val) {
-	    if (arguments.length === 1) { val = true; }
-	    _debugFlags[flag] = val;
-	    dispatch$1.call('change');
-	    return context;
+	  mode.sidebar = function (_) {
+	    if (!arguments.length) return sidebar;
+	    sidebar = _;
+	    return mode;
 	  };
 
-
-	  /* Container */
-	  var _container = select(null);
-	  context.container = function(val) {
-	    if (!arguments.length) { return _container; }
-	    _container = val;
-	    _container.classed('ideditor', true);
-	    return context;
-	  };
-	  context.containerNode = function(val) {
-	    if (!arguments.length) { return context.container().node(); }
-	    context.container(select(val));
-	    return context;
+	  mode.operations = function () {
+	    return [operationPaste(context)];
 	  };
 
-	  var _embed;
-	  context.embed = function(val) {
-	    if (!arguments.length) { return _embed; }
-	    _embed = val;
-	    return context;
-	  };
+	  return mode;
+	}
 
+	function behaviorAddWay(context) {
+	  var dispatch = dispatch$8('start', 'startFromWay', 'startFromNode');
+	  var draw = behaviorDraw(context);
 
-	  /* Assets */
-	  var _assetPath = '';
-	  context.assetPath = function(val) {
-	    if (!arguments.length) { return _assetPath; }
-	    _assetPath = val;
-	    _mainFileFetcher.assetPath(val);
-	    return context;
-	  };
+	  function behavior(surface) {
+	    draw.on('click', function () {
+	      dispatch.apply('start', this, arguments);
+	    }).on('clickWay', function () {
+	      dispatch.apply('startFromWay', this, arguments);
+	    }).on('clickNode', function () {
+	      dispatch.apply('startFromNode', this, arguments);
+	    }).on('cancel', behavior.cancel).on('finish', behavior.cancel);
+	    context.map().dblclickZoomEnable(false);
+	    surface.call(draw);
+	  }
 
-	  var _assetMap = {};
-	  context.assetMap = function(val) {
-	    if (!arguments.length) { return _assetMap; }
-	    _assetMap = val;
-	    _mainFileFetcher.assetMap(val);
-	    return context;
+	  behavior.off = function (surface) {
+	    surface.call(draw.off);
 	  };
 
-	  context.asset = function (val) {
-	    if (/^http(s)?:\/\//i.test(val)) { return val; }
-	    var filename = _assetPath + val;
-	    return _assetMap[filename] || filename;
+	  behavior.cancel = function () {
+	    window.setTimeout(function () {
+	      context.map().dblclickZoomEnable(true);
+	    }, 1000);
+	    context.enter(modeBrowse(context));
 	  };
 
-	  context.imagePath = function (val) { return context.asset(("img/" + val)); };
+	  return utilRebind(behavior, dispatch, 'on');
+	}
 
+	function behaviorHash(context) {
+	  // cached window.location.hash
+	  var _cachedHash = null; // allowable latitude range
+
+	  var _latitudeLimit = 90 - 1e-8;
+
+	  function computedHashParameters() {
+	    var map = context.map();
+	    var center = map.center();
+	    var zoom = map.zoom();
+	    var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
+	    var oldParams = utilObjectOmit(utilStringQs(window.location.hash), ['comment', 'source', 'hashtags', 'walkthrough']);
+	    var newParams = {};
+	    delete oldParams.id;
+	    var selected = context.selectedIDs().filter(function (id) {
+	      return context.hasEntity(id);
+	    });
 
-	  /* reset (aka flush) */
-	  context.reset = context.flush = function () {
-	    context.debouncedSave.cancel();
+	    if (selected.length) {
+	      newParams.id = selected.join(',');
+	    }
 
-	    Array.from(_deferred).forEach(function (handle) {
-	      window.cancelIdleCallback(handle);
-	      _deferred.delete(handle);
+	    newParams.map = zoom.toFixed(2) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
+	    return Object.assign(oldParams, newParams);
+	  }
+
+	  function computedHash() {
+	    return '#' + utilQsString(computedHashParameters(), true);
+	  }
+
+	  function computedTitle(includeChangeCount) {
+	    var baseTitle = context.documentTitleBase() || 'iD';
+	    var contextual;
+	    var changeCount;
+	    var titleID;
+	    var selected = context.selectedIDs().filter(function (id) {
+	      return context.hasEntity(id);
 	    });
 
-	    Object.values(services).forEach(function (service) {
-	      if (service && typeof service.reset === 'function') {
-	        service.reset(context);
+	    if (selected.length) {
+	      var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
+
+	      if (selected.length > 1) {
+	        contextual = _t('title.labeled_and_more', {
+	          labeled: firstLabel,
+	          count: selected.length - 1
+	        });
+	      } else {
+	        contextual = firstLabel;
 	      }
-	    });
 
-	    context.changeset = null;
+	      titleID = 'context';
+	    }
 
-	    _validator.reset();
-	    _features.reset();
-	    _history.reset();
-	    _uploader.reset();
+	    if (includeChangeCount) {
+	      changeCount = context.history().difference().summary().length;
 
-	    // don't leave stale state in the inspector
-	    context.container().select('.inspector-wrap *').remove();
+	      if (changeCount > 0) {
+	        titleID = contextual ? 'changes_context' : 'changes';
+	      }
+	    }
 
-	    return context;
-	  };
+	    if (titleID) {
+	      return _t('title.format.' + titleID, {
+	        changes: changeCount,
+	        base: baseTitle,
+	        context: contextual
+	      });
+	    }
 
+	    return baseTitle;
+	  }
 
-	  /* Projections */
-	  context.projection = geoRawMercator();
-	  context.curtainProjection = geoRawMercator();
+	  function updateTitle(includeChangeCount) {
+	    if (!context.setsDocumentTitle()) return;
+	    var newTitle = computedTitle(includeChangeCount);
 
+	    if (document.title !== newTitle) {
+	      document.title = newTitle;
+	    }
+	  }
 
-	  /* Init */
-	  context.init = function () {
+	  function updateHashIfNeeded() {
+	    if (context.inIntro()) return;
+	    var latestHash = computedHash();
 
-	    instantiateInternal();
+	    if (_cachedHash !== latestHash) {
+	      _cachedHash = latestHash; // Update the URL hash without affecting the browser navigation stack,
+	      // though unavoidably creating a browser history entry
 
-	    initializeDependents();
+	      window.history.replaceState(null, computedTitle(false
+	      /* includeChangeCount */
+	      ), latestHash); // set the title we want displayed for the browser tab/window
 
-	    return context;
+	      updateTitle(true
+	      /* includeChangeCount */
+	      );
+	    }
+	  }
 
-	    // Load variables and properties. No property of `context` should be accessed
-	    // until this is complete since load statuses are indeterminate. The order
-	    // of instantiation shouldn't matter.
-	    function instantiateInternal() {
+	  var _throttledUpdate = throttle(updateHashIfNeeded, 500);
 
-	      _history = coreHistory(context);
-	      context.graph = _history.graph;
-	      context.pauseChangeDispatch = _history.pauseChangeDispatch;
-	      context.resumeChangeDispatch = _history.resumeChangeDispatch;
-	      context.perform = withDebouncedSave(_history.perform);
-	      context.replace = withDebouncedSave(_history.replace);
-	      context.pop = withDebouncedSave(_history.pop);
-	      context.overwrite = withDebouncedSave(_history.overwrite);
-	      context.undo = withDebouncedSave(_history.undo);
-	      context.redo = withDebouncedSave(_history.redo);
+	  var _throttledUpdateTitle = throttle(function () {
+	    updateTitle(true
+	    /* includeChangeCount */
+	    );
+	  }, 500);
+
+	  function hashchange() {
+	    // ignore spurious hashchange events
+	    if (window.location.hash === _cachedHash) return;
+	    _cachedHash = window.location.hash;
+	    var q = utilStringQs(_cachedHash);
+	    var mapArgs = (q.map || '').split('/').map(Number);
+
+	    if (mapArgs.length < 3 || mapArgs.some(isNaN)) {
+	      // replace bogus hash
+	      updateHashIfNeeded();
+	    } else {
+	      // don't update if the new hash already reflects the state of iD
+	      if (_cachedHash === computedHash()) return;
+	      var mode = context.mode();
+	      context.map().centerZoom([mapArgs[2], Math.min(_latitudeLimit, Math.max(-_latitudeLimit, mapArgs[1]))], mapArgs[0]);
+
+	      if (q.id && mode) {
+	        var ids = q.id.split(',').filter(function (id) {
+	          return context.hasEntity(id);
+	        });
 
-	      _validator = coreValidator(context);
-	      _uploader = coreUploader(context);
+	        if (ids.length && (mode.id === 'browse' || mode.id === 'select' && !utilArrayIdentical(mode.selectedIDs(), ids))) {
+	          context.enter(modeSelect(context, ids));
+	          return;
+	        }
+	      }
 
-	      _background = rendererBackground(context);
-	      _features = rendererFeatures(context);
-	      _map = rendererMap(context);
-	      _photos = rendererPhotos(context);
+	      var center = context.map().center();
+	      var dist = geoSphericalDistance(center, [mapArgs[2], mapArgs[1]]);
+	      var maxdist = 500; // Don't allow the hash location to change too much while drawing
+	      // This can happen if the user accidentally hit the back button.  #3996
 
-	      _ui = uiInit(context);
+	      if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
+	        context.enter(modeBrowse(context));
+	        return;
+	      }
 	    }
+	  }
 
-	    // Set up objects that might need to access properties of `context`. The order
-	    // might matter if dependents make calls to each other. Be wary of async calls.
-	    function initializeDependents() {
+	  function behavior() {
+	    context.map().on('move.behaviorHash', _throttledUpdate);
+	    context.history().on('change.behaviorHash', _throttledUpdateTitle);
+	    context.on('enter.behaviorHash', _throttledUpdate);
+	    select(window).on('hashchange.behaviorHash', hashchange);
 
-	      if (context.initialHashParams.presets) {
-	        _mainPresetIndex.addablePresetIDs(new Set(context.initialHashParams.presets.split(',')));
+	    if (window.location.hash) {
+	      var q = utilStringQs(window.location.hash);
+
+	      if (q.id) {
+	        //if (!context.history().hasRestorableChanges()) {
+	        // targeting specific features: download, select, and zoom to them
+	        context.zoomToEntity(q.id.split(',')[0], !q.map); //}
 	      }
 
-	      if (context.initialHashParams.locale) {
-	        _mainLocalizer.preferredLocaleCodes(context.initialHashParams.locale);
+	      if (q.walkthrough === 'true') {
+	        behavior.startWalkthrough = true;
 	      }
 
-	      // kick off some async work
-	      _mainLocalizer.ensureLoaded();
-	      _background.ensureLoaded();
-	      _mainPresetIndex.ensureLoaded();
+	      if (q.map) {
+	        behavior.hadHash = true;
+	      }
 
-	      Object.values(services).forEach(function (service) {
-	        if (service && typeof service.init === 'function') {
-	          service.init();
-	        }
-	      });
+	      hashchange();
+	      updateTitle(false);
+	    }
+	  }
 
-	      _map.init();
-	      _validator.init();
-	      _features.init();
-	      _photos.init();
+	  behavior.off = function () {
+	    _throttledUpdate.cancel();
 
-	      if (services.maprules && context.initialHashParams.maprules) {
-	        d3_json(context.initialHashParams.maprules)
-	          .then(function (mapcss) {
-	            services.maprules.init();
-	            mapcss.forEach(function (mapcssSelector) { return services.maprules.addRule(mapcssSelector); });
-	          })
-	          .catch(function () { /* ignore */ });
-	      }
+	    _throttledUpdateTitle.cancel();
 
-	      // if the container isn't available, e.g. when testing, don't load the UI
-	      if (!context.container().empty()) { _ui.ensureLoaded(); }
-	    }
+	    context.map().on('move.behaviorHash', null);
+	    context.on('enter.behaviorHash', null);
+	    select(window).on('hashchange.behaviorHash', null);
+	    window.location.hash = '';
 	  };
 
-
-	  return context;
+	  return behavior;
 	}
 
-	// When `debug = true`, we use `Object.freeze` on immutables in iD.
 	// This is only done in testing because of the performance penalty.
-	var debug = false;
+
+	var debug = false; // Reexport just what our tests use, see #4379
 	var d3 = {
-	  customEvent: customEvent,
-	  dispatch:  dispatch,
-	  event:  event,
+	  dispatch: dispatch$8,
 	  geoMercator: mercator,
 	  geoProjection: projection,
 	  polygonArea: d3_polygonArea,
@@ -118596,6 +123419,7 @@
 		actionReverse: actionReverse,
 		actionRevert: actionRevert,
 		actionRotate: actionRotate,
+		actionScale: actionScale,
 		actionSplit: actionSplit,
 		actionStraightenNodes: actionStraightenNodes,
 		actionStraightenWay: actionStraightenWay,
@@ -118623,6 +123447,8 @@
 		coreLocalizer: coreLocalizer,
 		t: _t,
 		localizer: _mainLocalizer,
+		coreLocations: coreLocations,
+		locationManager: _mainLocations,
 		prefs: corePreferences,
 		coreTree: coreTree,
 		coreUploader: coreUploader,
@@ -118753,7 +123579,8 @@
 		serviceMapillary: serviceMapillary,
 		serviceMapRules: serviceMapRules,
 		serviceNominatim: serviceNominatim,
-		serviceOpenstreetcam: serviceOpenstreetcam,
+		serviceNsi: serviceNsi,
+		serviceKartaview: serviceKartaview,
 		serviceOsm: serviceOsm,
 		serviceOsmWikibase: serviceOsmWikibase,
 		serviceStreetside: serviceStreetside,
@@ -118776,7 +123603,7 @@
 		svgMidpoints: svgMidpoints,
 		svgNotes: svgNotes,
 		svgMarkerSegments: svgMarkerSegments,
-		svgOpenstreetcamImages: svgOpenstreetcamImages,
+		svgKartaviewImages: svgKartaviewImages,
 		svgOsm: svgOsm,
 		svgPassiveVertex: svgPassiveVertex,
 		svgPath: svgPath,
@@ -118793,6 +123620,7 @@
 		uiFieldDefaultCheck: uiFieldCheck,
 		uiFieldOnewayCheck: uiFieldCheck,
 		uiFieldCheck: uiFieldCheck,
+		uiFieldManyCombo: uiFieldCombo,
 		uiFieldMultiCombo: uiFieldCombo,
 		uiFieldNetworkCombo: uiFieldCombo,
 		uiFieldSemiCombo: uiFieldCombo,
@@ -118809,7 +123637,8 @@
 		uiFieldCycleway: uiFieldCycleway,
 		uiFieldLanes: uiFieldLanes,
 		uiFieldLocalized: uiFieldLocalized,
-		uiFieldMaxspeed: uiFieldMaxspeed,
+		uiFieldRoadheight: uiFieldRoadheight,
+		uiFieldRoadspeed: uiFieldRoadspeed,
 		uiFieldStructureRadio: uiFieldRadio,
 		uiFieldRadio: uiFieldRadio,
 		uiFieldRestrictions: uiFieldRestrictions,
@@ -118935,9 +123764,10 @@
 		utilDisplayLabel: utilDisplayLabel,
 		utilEntityRoot: utilEntityRoot,
 		utilEditDistance: utilEditDistance,
-		utilEntitySelector: utilEntitySelector,
+		utilEntityAndDeepMemberIDs: utilEntityAndDeepMemberIDs,
 		utilEntityOrMemberSelector: utilEntityOrMemberSelector,
 		utilEntityOrDeepMemberSelector: utilEntityOrDeepMemberSelector,
+		utilEntitySelector: utilEntitySelector,
 		utilFastMouse: utilFastMouse,
 		utilFunctor: utilFunctor,
 		utilGetAllNodes: utilGetAllNodes,
@@ -118947,6 +123777,8 @@
 		utilKeybinding: utilKeybinding,
 		utilNoAuto: utilNoAuto,
 		utilObjectOmit: utilObjectOmit,
+		utilCompareIDs: utilCompareIDs,
+		utilOldestID: utilOldestID,
 		utilPrefixCSSProperty: utilPrefixCSSProperty,
 		utilPrefixDOMProperty: utilPrefixDOMProperty,
 		utilQsString: utilQsString,
@@ -118982,24 +123814,21 @@
 		validationUnsquareWay: validationUnsquareWay
 	});
 
-	// polyfill requestIdleCallback
-	window.requestIdleCallback = window.requestIdleCallback ||
-	    function(cb) {
-	        var start = Date.now();
-	        return window.requestAnimationFrame(function() {
-	            cb({
-	                didTimeout: false,
-	                timeRemaining: function() {
-	                    return Math.max(0, 50 - (Date.now() - start));
-	                }
-	            });
-	        });
-	    };
+	window.requestIdleCallback = window.requestIdleCallback || function (cb) {
+	  var start = Date.now();
+	  return window.requestAnimationFrame(function () {
+	    cb({
+	      didTimeout: false,
+	      timeRemaining: function timeRemaining() {
+	        return Math.max(0, 50 - (Date.now() - start));
+	      }
+	    });
+	  });
+	};
 
-	window.cancelIdleCallback = window.cancelIdleCallback ||
-	    function(id) {
-	        window.cancelAnimationFrame(id);
-	    };
+	window.cancelIdleCallback = window.cancelIdleCallback || function (id) {
+	  window.cancelAnimationFrame(id);
+	};
 	window.iD = iD;
 
 }());